WO2002025154A1 - Electromagnetically actuated valve unit and a valve assembly - Google Patents

Abstract

The invention relates to an electromagnetically actuated valve unit comprising a housing, an actuating device, a primary valve and a pilot chamber that is connected to the outlet chamber by a pilot valve and connected to the inlet chamber by at least one connecting channel. The primary valve member and the pilot valve member are combined to form one structural entity. According to the invention, the fixed seat of the primary valve is formed by an insert, consisting of at least two parts, that can be clamped into the housing of the valve unit. The pilot chamber is assigned to the primary valve member in such a way that at least one part of the opposing surfaces, viewed from the flow direction of the hydraulic fluid, of said primary valve member is respectively subjected to the pressure prevailing in the inlet chamber and the pressure prevailing in the pilot chamber. The pilot chamber is respectively connected to the inlet chamber and to the pilot valve by at least one connecting channel that penetrates the structural entity. The pilot valve is connected to the outlet chamber by at least one connecting channel located outside the structural entity in the housing or in the insert.

Description

 Electromagnetically actuated valve device and valve device

The invention relates to an electromagnetically actuated valve device, in particular with the features from the preamble of claim 1; also a combined valve device.

An electromagnetically actuated valve device to ensure different functions is known from EP 0 305 710 A2. The combination of such valve devices - a first electromagnetically actuated valve device and a second electromagnetically actuated valve device - to form a combined valve device can also be found in this document. In this case, both are integrated in a shared housing. The first electromagnetically actuated valve device serves to control the connection between a pressure medium source and a consumer or a consumer system, i.e. a plurality of consumers, while the second valve device is used to control the pressure relief of the consumer or the consumer system. Both valve devices of the combined valve device are preferably constructed identically in order to achieve a high degree of standardization with regard to the design of the individual elements. The first valve device has an inlet chamber which can be connected to the pressure medium source via a corresponding connection and a working chamber which can be connected to a consumer or a consumer system, a main valve being arranged between the two chambers. This consists of a movable main valve element and a valve seat fixed to the housing. In the housing of the first valve device, a pilot chamber and a compensation chamber are also provided in addition to the inlet chamber and the working chamber. To control the movement of the main valve member is a

Actuator provided. The actuator is designed such that it is on a the first surface assigned to the inlet chamber is acted upon by the inlet pressure in the opening direction of the main valve, while the pressure in the pilot chamber is applied to a second surface of the actuator assigned to the pilot chamber in the closing direction of the main valve. The second area is larger than the first area. The

Pilot chamber can be connected to the working chamber via a pilot valve. The pilot valve is formed by a movable pilot valve member and a pilot valve body connected to the armature of the actuating magnet. The main valve member and the pilot valve member are firmly coupled such that movement of the

Main valve member in the opening direction of the main valve is at the same time a movement of the pilot valve member in the closing direction of the pilot valve. The pilot chamber is connected to the inlet chamber via a throttle connection. The throttle connection is dimensioned such that, with a small opening cross section of the pilot valve, the pressure medium throughput into the pilot chamber is at least as great as the pilot valve from the pilot chamber and, with an increasing opening cross section of the pilot valve, a lower pressure medium throughput into the pilot chamber than the pilot valve from. The second valve device, which is preferably constructed analogously to the first valve device with regard to the actuator, the actuating device and the functioning of the main and pilot valve, has a working chamber connected to the consumer system, which in the combined valve device also represents the outlet chamber of the first valve device and one outlet chamber connected to an outlet, between which a main valve consisting of a valve seat fixed to the housing and a movable main valve member is arranged, the outlet being at least indirectly connected to a pressure relief chamber. Furthermore, in analogy to the first valve device, the movement of the

Main valve controlling actuator and a pilot chamber intended. The actuator is acted upon by the consumer pressure on a first surface assigned to the working chamber in the opening direction of the main valve. The actuator in the closing direction of the main valve is acted upon by the pressure in the pilot chamber on a second surface assigned to the pilot chamber. The second

The area is also larger than the first area. The pilot chamber can be connected to the outlet chamber via a pilot valve. The pilot valve is formed by a movable pilot valve member and a pilot valve body connected to the armature of the actuating magnet. The main valve member and pilot valve member are so firmly coupled that a movement of the main valve member in the opening direction of the main valve is at the same time a movement of the pilot valve member in the closing direction of the pilot valve. The pilot chamber is connected via a further throttle connection to the outlet i.e. in this case the

Relief chamber connected.

The valve devices disclosed in this document are structurally very complex and assembly-intensive. These include an actuator with valve and switching piston at the ends. The thinner part of the

Actuator is guided through a partition. The individual parts are riveted together to ensure power transmission. The construction of the actuating device increases the space required for the individual valve device. Furthermore, it is not possible to check the valve seats without destroying the individual valve devices or the combined valve device. The replacement of the elastic valve seat part of the main valve also requires a lot of effort. In the case of repairs or maintenance, damage to other parts that were not originally affected cannot be ruled out. A

Repairing this valve device is therefore associated with risks, which is why it is always advisable to replace the entire valve device or even the entire valve device in the event of damage, regardless of degree. .

The invention is therefore based on the object of providing a valve device and in particular a combined valve device for controlling the connection between a pressure medium source and a consumer system and for controlling the pressure relief of the consumer system, which is easy to install and maintain or repair. The required construction volume is to be reduced with constant or increased fluid throughput, in particular air throughput. Another aspect is the simple manufacture of the individual elements of the individual valve devices and in particular the combined valve device. The requirements for ease of repair include a possible verifiability of the quality of valve pairs, so that if the results are good, further use of the valve pairs already in operation should be possible. If a replacement is required, then only the defective parts should be replaced, while the undamaged individual elements remain in use.

The solution according to the invention is characterized by the features of claims 1 and 19. Advantageous embodiments are given in the subclaims.

The electromagnetically actuated valve device comprises an electromagnetic actuating device, a main valve member, which is arranged between an inlet chamber and an outlet chamber, has a main valve member and a stationary valve seat, and furthermore a pilot control chamber which communicates with the valve via a pilot valve

Outlet chamber is connected. The pilot valve comprises a valve member and a valve body which is connected to an armature of the electromagnetic actuation device which is coupled to an actuation magnet. The main valve member and the pilot valve member are coupled to one another such that a movement of the main valve member in the opening direction of the main valve also a movement of the

Pilot valve member in the closing direction of the pilot valve. For this purpose, the main valve member and the pilot valve member are combined to form a structural unit, which is also referred to as a closing body. According to the invention, the fixed seat for the main valve member is formed by an at least two-part insert which can be arranged in the housing of the electromagnetically actuated valve device. The closing body forms the pilot chamber by means of corresponding sealing devices with the insert and possibly the housing, the pilot chamber being arranged in such a way that the pressure in it acts on the main valve member on the end face directed away from the inlet chamber. The coupling between the inlet chamber and the pilot valve takes place via at least one axial channel. The connection between the pilot valve and the outlet chamber takes place via at least one connecting channel arranged in the housing or the insert.

The provision of the at least two-part insert, the combination of the main valve member and pilot valve member in one structural unit and the assignment of the pilot chamber to the closing body make it easy to assemble and disassemble

Valve device created, which is also very easy to maintain and repair, damage to adjacent components is not necessarily expected when dismantling. Since the valve pairs are formed on different elements, the defective components are replaced independently of the others

Use of the other valve pairs possible. By the very crowded ß

The design and combination of the functional units in a very small space significantly reduced the required construction volume while maintaining the same or increased fluid throughput, especially air throughput.

The electromagnetically operable designed according to the invention

Valve device is suitable for the implementation of various tasks. This is according to the arrangement in pneumatic circuits or the assignment to individual elements of such a circuit either as a 1) control valve for controlling the connection between one

Pressure medium source and a consumer system, not shown, or as a 2) pressure relief valve for controlling the pressure relief of a

Consumer or multiple consumers can be used.

In the former case, the inlet chamber can be coupled to a pressure medium source, while the outlet chamber acts as a working chamber and is coupled to a consumer. In the second case, the inlet chamber is formed by the working chamber, which is coupled to a consumer, while the outlet can be connected to a relief chamber.

In a further aspect of the invention, however, it is also possible to assign a valve device designed according to the invention to any conventional valve device such that either the task mentioned under 1 or the task mentioned under 2 of the

Valve device is taken over.

Preferably, both valve devices are combined in a combined valve device to fulfill the two aforementioned tasks. In this case, the structure and design of the

Individual elements of the main and pilot valves are preferably identical. This offers the advantage that a high degree of uniformly designed partial elements is produced, which is particularly advantageous when individual elements have to be replaced, since the storage is reduced due to the small number of different components. For this purpose, two electromagnetically actuated valve devices designed according to the invention are combined in a housing which has three connections - an inlet which can be coupled to a pressure medium source, an outlet which is at least indirectly coupled to a consumer and a relief connection which is at least indirectly connected to a relief chamber is connected - has. In this

In this case, the outflow of the first valve device and the inflow to the second valve device are formed by a common connection to the consumer, that is to say one connection is shared. This combined valve device serves on the one hand to control the connection between the inlet from the pressure medium source

Consumer and further control of the pressure relief in the working chamber coupled to the consumer. Both valve devices are constructed identically with regard to the actuating device and the closing body. However, there are differences with regard to the inserts in the common housing, since the boundary between the two valve devices is not formed by the housing wall but by the insert or one of the inserts. The inserts are preferably designed in several parts for each valve device in order to enable simple assembly and disassembly of the individual elements of the valve device, in particular of the closing body. The

Closing body itself is designed as a piston element which, to form the main valve, has a piston-like widened end region which is acted upon by the pressure in the inlet chamber or by the pressure in the working chamber, depending on the type of valve device, on its end face - first valve device or second valve device.

The connection between the inlet chamber and the pilot valve takes place via a channel extending in the axial direction through the closing body. This thus serves to form a constant throttle in the entry area into the axial channel on the closing body and, through the corresponding actuation of the pilot valve body, which is coupled to an armature element of the electromagnetic actuating device, to form a controllable throttle which is connected downstream of the constant throttle.

Both valve devices - the first valve device and the second valve device - have an electromagnetic actuating device, which is preferably likewise of identical design. This comprises at least one actuating magnet, which is connected to an armature. The armature in turn is at least indirectly, preferably directly connected to the valve body of the pilot valve device. Regarding the mode of action and thus the achievement of the individual

Functional positions of the pilot valve device of each valve device essentially consist of the two options mentioned below:

1. Selection of an actuating magnet with an increasing stroke / current characteristic, that is to say the valve body is pulled into the corresponding functional position.

2. Formation of the actuating magnet with a falling stroke / current characteristic, that is to say realization of the functional positions of the valve body by pressure.

When the two valve devices are combined in a combined valve device, both valve devices with an identical actuating device are preferably used, so that the positions required to implement the functioning of the combined valve device are realized either by energizing or not energizing a single armature element. Exploiting this Possibility offers the advantage that the degree of standardization for the design of such valve devices for different purposes and use in combination in a combined valve device can be increased considerably. This also has the advantage that in the event of a replacement, particularly in the case of combined valve devices, it is not necessary to pay attention to different actuating devices.

The specific design of the individual elements of the individual valve devices can be done differently. However, at least the configuration of the closing body is preferably symmetrical with respect to an axis. The closing body is designed as a piston element, that is to say as an element with different dimensions when viewed in cross section. To form the pilot chamber and simple assembly, the insert is made in several parts, preferably in two parts. The two-part or multi-part design enables easy assembly and disassembly of the individual elements of the valve device and thus interchangeability of defective components.

At least one connecting channel is located in the closing body between

Inlet chamber and pilot chamber and pilot chamber and pilot valve arranged. Both channels are preferably combined in one channel which is connected to the pilot chamber. This extends from the end face of the main valve member facing the inlet chamber into the end region of the closing body, which is the

Valve element of the pilot valve forms.

There are a number of possibilities with regard to the execution of the inserts. When designed as a single valve device, that is to say with only one closing body and one actuating device for use between an inlet and an outlet, these are preferred constructed symmetrically. In the simplest case, a two-part version is also chosen here. The first insert element in the feed direction of the feed forms the valve seat of the main valve. To form the pilot chamber there is one between the end face of the closing body directed away from the inlet in the area of the formation of the main valve

Sealing device is provided, which abuts this surface and is attached to the insert, either on the first insert element or on the second insert element. This sealing device is preferably designed as an elastic membrane. Preferably, sealing devices are also provided between the main valve seat and the surfaces on the main valve member that are operatively connected to them. These can either be arranged on the stationary valve seat or on the closing body. The arrangement is preferably carried out on the closing body.

The second insert element in a two-part design of the insert is downstream of the first, viewed in the inflow direction from the inlet, and forms further boundary walls of the pilot chamber via a corresponding seal with the closing body. The second insert element is preferably designed such that, in addition to the support surface on the inner wall of the housing of the valve device, it has a projecting area which extends in the direction of the closing body and serves to support a sealing device, for example in the form of an O-ring. In the closed position of the valve device, that is to say the closed position of the main valve, the closing body is designed in such a way that it extends in the axial direction beyond the axial extent of the second insert element. This avoids contact with the valve body of the pilot valve device with a correspondingly narrow design of the insert. The connection between the pilot valve and the outlet takes place via corresponding through openings in the housing or on the insert, preferably the first and the second insert element outside the region of the pilot chamber.

When implemented as a combined valve device, that is to say combining the two valve devices and assigning them to the three connections mentioned above, the inserts are designed in such a way that the highest possible degree of standardization is achieved, that is, the proportion of elements with an identical structure is as high as possible is. In this case, the connection between the first pilot valve and the outlet, that is to say the working chamber, which is coupled to the consumer, is realized via a through opening which is arranged between the insert for the second valve device and the insert for the first valve device. The insert elements are arranged such that they are supported against each other.

The embodiment with a combined valve device is particularly advantageous, in which the membrane used to form the pilot chamber extends over both valve devices and is thus arranged, for example clamped, between the first and the second insert element of the inserts for the first and second valve devices. To connect the individual pilot valves with the corresponding outlets, that is, the first pilot valve device with the working chamber and the second

Pilot valve device with the relief chamber, at least one corresponding opening in the sealing device is provided, for example in the form of through openings.

When two valve devices designed according to the invention are formed or combined to form a combined one Valve device with three connections, this can be supplemented in a further aspect of the invention by additional components in order to perform additional functions. It is conceivable, for example, to integrate devices for detecting a state variable, in particular the pressure in the working chamber towards the consumer. This is usually in the form of a pressure sensor. The advantage is that by coupling with the appropriate electronics, in particular connection or inclusion in a control device, regulation of this state variable, in particular of the pressure, is possible.

A further development is to integrate an electronic control device in the combined valve device in addition to the pressure sensor. This integration enables the creation of a compact, easy to install and repair-friendly pressure control module, which can be offered as a fully tradable unit.

The solution according to the invention is explained below with reference to figures. The following is shown in detail:

FIG. 1 illustrates, using a sectional illustration, an embodiment of valve devices designed according to the invention in a combined valve device;

Figure 2 illustrates an embodiment according to Figure 1 with means for detecting a state variable in the working chamber;

Figure 3 illustrates an embodiment according to Figure 1 with the integration of an electronic control unit.

FIG. 1 illustrates an advantageous embodiment of a combined one on the basis of a sectional illustration in the form of an axial section

Valve device 1. This comprises two valve devices, a first Valve device 2 and a second valve device 3, the first valve device 2 in the combined valve device 1 acting as an inlet valve and the second valve device -3 as an outlet valve, for controlling the connection between a pressure medium source, not shown, and a consumer, also not shown

Consumer system, as well as to control the pressure relief on the consumer.

Both valve devices - first valve device 2 and second valve device 3 - can be actuated electromagnetically

Valve devices executed. For this purpose, the first valve device 2, that is to say the inlet valve device and the second valve device 3, that is to say the outflow valve device, each comprise means 4.1 and 4.2 for electromagnetic actuation. The means 4.1 and 4.2 for the electromagnetic actuation of the first valve device 2 and the second valve device 3 each have an actuating magnet 5.1 for the means 4.1 for electromagnetic actuation and 5.2 for the means 4.2 for electromagnetic actuation and an armature 6.1 and 6.2.

Each valve device - first valve device 2 and second valve device 3 - comprises a pilot valve, which is designated 8.1 for the first valve device 2 and 8.2 for the second valve device 3, and a main valve 9.1 and 9.2, respectively. Each main valve 9.1 and 9.2 has at least one main valve member 10.1 or 10.2 and a fixed valve seat 11; 1 or 11.2, while each pilot valve 8.1 and 8.2 has a pilot valve member 12.1 or 12.2 and a pilot valve body 7.1 coupled to the armature 6.1 or 6.2 of the actuating magnets 5.1 or 5.2 or 7.2 includes. The

Main valve members 10.1, 10.2 and the pilot valve members 12.1, 12.2 each Valve device - first valve device 2 and second valve device 3 are combined in a structural unit 13.1 or 13.2, so that a movement of the main valve member 10.1 or 10.2 in the opening direction of the main valve 9.1 or 9.2 also a movement of the pilot valve member 12.1 or

12.2 effected in the closing direction of the pilot valve 8.1 or 8.2. The structural units 13.1, 13.2 are each formed by a closing body 14.1, 14.2, which comprises, for example, a piston element 15.1, 15.2 and a shaft 16.1, 16.2 coupled to the piston element 15.1, 15.2, the main valve members 10.1,

10.2 are each formed by the piston elements 15.1, 15.2 and the pilot valve members 12.1, 12.2 from the shaft end.

Each valve device - first valve device 2 and second valve device 3 comprises an inlet chamber 17.1 or 17.2 and an outlet chamber 18.1 or 18.2, which can be coupled to corresponding connections. The main valves 9.1 and 9.2 are arranged between the corresponding inlet chambers 17.1 and 17.2 and the outlet chambers 18.1 and 18.2. Each of the chambers - inlet chambers 17.1, 17.2 and

Auslaßkammerπ 18.1, 18.2 - are with connections - here a first connection 20.1 for the inlet chamber 17.1 and a second connection 21.1 for the outlet chamber 18.1 of the first valve device 2 and a first connection 20.2 for the inlet chamber 17.2 and a second connection 21.2 for the outlet chamber 18.2 second valve device 3 - coupled. In the illustrated case of the combined valve device 1, the outlet chamber 18.1 of the first valve device 2 and the inlet chamber 17.2 of the second valve device 3 are combined and form a working chamber 19 which can be coupled to the consumer. In addition to the merging of the inlet chamber 17.2 of the second valve device 3 and the outlet chamber 18.1 of the first valve device 2 are also with it Connected connections - second connection 21.1 of the first valve device 2 and first connection 20.2 of the second valve device 3 combined to form a connection 22.

The first connection 20.1 of the first valve device 2 is formed by an inlet 23 which can be coupled to a pressure medium source. The second connection 21.1 of the first valve device 2 and thus the connection 22 of the combined valve device 1 is formed by a connection to the consumer. The first port 20.2 of the second valve device 3 is also from the port 22 for the purpose of pressure relief

Consumers are formed, while the second connection 21.2 of the second valve device 3 represents a connection 24 to a relief space. The term connection is not only to be understood in such a way that it is already an element of a positive and / or non-positive connection with corresponding lines, the term connection here only serves to reproduce the function, i.e. the provision of the possibility of coupling with a pressure medium source, a consumer e.t.c. The housing 25 of the combined valve device 1 has three connections, the inlet 23, which can be coupled to a pressure medium source, the connection 22 to the consumer, which supplies and supplies

Venting is vented and a connection 24 for ventilation, which is also referred to as a connection for coupling to a relief space. It is also conceivable, but not shown in detail here, not to directly connect the second connection 21.1 of the first valve device 2 and the first connection 20.2 of the second valve device 3, but via a module, not shown here, which has a connection block for individual channels represents, and includes as an output the connection to the consumer.

A pilot chamber 26.1, 26.2 is assigned to each pilot valve 8.1, 8.2. The pilot chamber 26.1 is connected to the first connection 20.1 of the first valve device 2, that is to say connected to the inlet 23 or the inlet chamber 17.1 coupled thereto, while the pilot chamber 26.2 of the second valve device 3 is connected to the first connection 20.2 of the second valve device 3, which is formed by the connection 22 to the consumer, or the working chamber 19 is coupled. The coupling between the inlet chamber 17.1 of the first valve device 2 and 17.2 of the second valve device 3 and the pilot chamber 26.1 or 26.2 takes place via a connecting channel 27.1 or 27.2 arranged in the closing body 14.1 or 14.2. This connecting channel 27.1 respectively

27.2 is unchangeable in its cross section during operation and therefore forms a constant throttle. The connection channel 27.1 or 27.2 preferably runs parallel to the inlet 23 or connection 22 to the consumer. An inclined one

Execution for the direction of flow in the inlet 23 or for connection to the consumer 22 is also conceivable, but is generally not sought. The coupling between the pilot chambers 26.1 and 26.2 and the pilot valves 8.1 and 8.2 takes place in each case via at least one further, which is due to the structural

Connecting channel 28.1 or 28.2 extending unit 13.1 or 13.2. The connecting channel 27.1 or 27.2 and the connecting channel 28.1, 28.2 are preferably combined to form an axial common channel 29.1 or 29.2 which extends through the structural unit 13.1 or 13.2. In this case, the coupling to the pilot chamber 26.1 or 26.2 takes place via a channel 30.1 or 30.2, which extends from the pilot chamber 26.2 or 26.2 into the channel 29.1 or 29.2. The pilot chambers 26.1, 26.2 are arranged in such a way that a back pressure to the pressure in the inlet chamber 17.1 at the main valve 9.1 and the working chamber 19 at the main valve 9.2 of the second valve device 3 is generated. At least a partial area 31.1 of the end face 32.1 of the

Main valves 9.1 pressurized from the egg lasskammer 17.1, while the pressure in the pilot chamber 26.1 acts on the end face 33.1 facing away from the inlet chamber 17.1 on the first closing body 14.1. In analogy, this statement also applies to the second valve device 3, here it is the partial area 31.2 which is acted upon by the pressure in the working chamber 19 on the end face 32.2 facing the working chamber 19, while the pressure in the pilot chamber 26.2 on that of the Working chamber 19 facing end face 33.2 acts.

The channel 27.1 or 27.2 preferably has a cross-section that is not variable during operation, so that it takes on the function of a constant throttle between the inlet chamber 17.1 and the pilot chamber 26.1 or the working chamber 19 and the pilot chamber 26.2. The pilot valve 8.1 or 8.2 is designed as a controllable throttle device. This is in each case formed by the pilot valve members 12.1 and 12.2, which form the structural unit 13.1 or 13.2 with the main valves 9.1 and 9.2, in particular the main valve member 10.1 or 10.2, and pilot valve bodies 7.1, 7.2, which each with the armatures 6.1, 6.2 of the actuating magnets 5.1 , 5.2 are connected. In the case shown, both actuating magnets 5.1 and 5.2 are shown in the de-energized state, this state being characterized in that the first valve device 2 is closed and thus blocks the inlet 23, while the second valve device 3 is open, so that between the Connection to the consumer 22 and the atmosphere or a relief chamber 24, there is a connection, but here the main valve 9.2 is shown in the closed state. The other states are explained in the functional description below.

According to the invention, in addition to the integration of a constant throttle and a controllable throttle in the form of the pilot valve 8.1 or 8.2 in a structural unit 13.1 or 13.2, the individual elements - main valve 9.1, 9.2 and pilot valve device 8.1, 8.2 of the two valve devices 2 and 3 - are each made using an at least two-part insert 34.1, 34.2 clamped in the housing 25 pressure-tight. The individual insert elements of each two-part insert 34.1, 34.2 are each designated 34.11 or 34.12 for the two-part insert 34.1 and 34.21 or 34.22 for the two-part insert 34.2. The inserts 34.1, 34.2 are integrated in the housing 25 and designed and arranged in such a way that they are supported on the inner walls 35 of the housing 25, in particular on the housing inner wall region 35.1 on a housing basic element 36 and a housing inner wall region 35.2, which is separated from one with the

Basic housing element 36, the cover element 37 forming the housing 25 is formed. The stationary valve seat 11.1 or 11.2 of the respective main valve 9.1 or 9.2 is formed by the two-part insert 34.1, 34.2, in particular the first insert element 34.11 of the first insert 34.1 or 34.21 of the second valve device 3. For this purpose, the first insert element 34.11 of the insert 34.1 of the first valve device 2, which is arranged in the flow direction from the inlet 23 to the connection 22 to the consumer before the second insert element 34.12, has a projection 38 which forms the valve seat 11.1 with at least one partial surface 39. The closing body 14.1, which in

Shape of the piston element 15.1 is designed, with its inlet 23 directed surface 32.1 on the valve seat 11.1 come to rest. The pilot chamber 26.1 is formed between the second insert part element 34.12 and the closing body 14.1. In the simplest case, a sealing device 40.1 is provided for this purpose, on the one hand between the first insert part element 34.11 and the second

Insert part element 34.12 of the first insert is fixed and, on the other hand, is fastened to the end face 33.1 of the closing body 14.1 facing away from the inlet 23 or the inlet chamber 17.1. In the case shown, the sealing device 40.1 is designed as a membrane and is fastened between the first and second insert part elements 34.11 and 34.12, respectively. However, it is also conceivable that the sealing device 40.1 is only fastened to the second insert element 34.12 of the first insert 34.1 and to the end face 33.1 of the closing body 14.1 which faces away from the inlet 23 or the inlet chamber 17.1. Furthermore, a further second sealing device 41.1 is provided to form the pilot chamber 26.1, which is also arranged between the second insert part element 34.12 of the first insert 34.1 and the closing body 14.1. The shape of the second insert element 34.12 is such that it has its support surfaces 42.1 for the sealing device 41.1 with its

Inner contour 43.1 forms at least one wall area of the pilot chamber 26.1. The two sealing devices 40.1 and 41.1 are arranged one behind the other in the axial direction. In the de-energized state of the actuating magnet 5.1 shown, that is to say when the first 5 valve device 2 is closed, the second controllable throttle device in the form of the pilot valve 8.1 is also closed. The pilot valve 8.1 is connected to the connection 22 to the consumer via a conductive connection. This is in the form of at least one connecting channel 44.1 which is formed in the housing wall or by providing at least one or more channel-like channels

Through openings 45.1 on the first insert element 34.11 or 45.2 is formed on the second insert element 34.12. Analogously, the explanations regarding the design of the pilot chamber 26.2 and the sealing devices required for this also apply to the second valve device 3. However, it must be taken into account that the second valve device 3 is also shown here in the de-energized state of the actuating magnets 5.2, which has an open position ,

The two valve devices - first valve device 2 and second valve device 3 - are combined to form a valve combination in the form of a combined valve device 1. The individual valve devices 2 and 3 are preferably constructed and designed in the same way in accordance with the arrangement and configuration of the individual valves - main valve and pilot valve. Through the combination, however, there is the possibility that either on a separate

Insert element can be omitted, or they are designed such that an insert element of a valve device 2 or 3 takes over the function of the partition between the two valve devices 2 and 3, so that the insert element of the other valve device no longer has to be formed in the intermediate area between the two valve devices. Another possibility is to combine the insert elements 34.11 and 34.21 to form a structural unit. In these particularly preferred embodiments, by combining the two valve devices, a separate partition between the two valve devices can be dispensed with when designing the inserts. There are a number of options in this regard. One is clearly shown in FIG. 1. In this embodiment, the connection channel between pilot valve 8.1 and outlet chamber 17.2 or working chamber 19 is the second insert element 34.12 of the first

Ventiie 2 and 34.22 of the second valve device 3 formed, and through the arrangement of both insert elements to each other. The first insert element 34.21 of the second valve device supports the two insert elements 34.12 and 34.22. This offers the advantage that the sealing device 40.1 is used simultaneously as a continuous sealing device for the formation of the second pilot chamber 26.2 of the second valve device 3. The transfer of the fluid from the pilot valves 8.1 or 8.2 designed as controllable throttles to the corresponding outlet, that is to say for the valve device 2 to the working chamber 19 and for the valve device 3 to a ventilation connection 24 or a ventilation chamber, takes place via at least one through opening 46 in the sealing device 40.1 or 40.2. Furthermore, the first insert element 34.21 of the second valve device 3 simultaneously forms the support surface for the sealing devices 40.1 and 40.2.

Both valve devices - first valve device 2 in the form of the inlet valve and second valve device 3 in the form of the outlet valve - operate on the same principle, the nozzle-baffle plate principle. Controllable resistors are used to set pressures.

The mode of operation is first explained below for the first valve device 2. The first valve device 2 is connected to the supply pressure for the inlet chamber 17.1. Due to the constant throttle in the form of the connecting channel 27.1 in the closing body 14.1, this supply pressure prevails, that is to say the pressure in the inlet chamber 17.1 also in the

Pilot chamber 26.1, since the controllable throttle device in the form of the pilot valve 8.1 is closed when the actuating magnet 5.1 is de-energized. Since the prevailing pressure in the chamber leading to the consumer, ie working chamber 19, is in this case less than or at most equal to the pressure in the inlet chamber 17.1, the main valve 9.1 also remains when the pilot valve 8.1 is closed closed. To increase the pressure in the chamber leading to the consumer, that is to say the working chamber 19, the actuating magnet 5.2 of the second valve device 3 is energized. This leads to the closing of the pilot valve 8.2 of the second valve device 3. If the actuating magnet 5.1 of the first valve device 2 is now energized, the controllable throttle device in the form of the pilot valve device 8.1 opens on the first closing body 14.1. The fluid from the pilot chamber 26.1 flows via the pilot valve 8.1 to the working chamber 19. Via the throttle device designed as a constant throttle in the form of the connecting channel 27.1 in the closing body

14.1 flows fluid from the inlet chamber 17.1. A pilot pressure is established in the pilot chamber 26.1 from the opening ratio between the constant throttle and pilot valve 8.1. The pressures thereby acting on the surfaces of the piston element 15.1 of the closing body 14.1 and the forces acting on the closing body 14.1 keep the latter in

Balance. If the pilot valve 8.1 is fully opened, the pressure in the pilot chamber 26.1 is immediately reduced to a relatively low pressure. The balance of forces at the closing body 14.1 is disturbed. This opens the main valve device 9.1. Fluid flows from the inlet chamber 17.1 directly into the working chamber 19 and thus to

Connection 22 to the consumer. As a result of the stroke of the closing body 14.1, the opening stroke of the controllable throttle device 8.1 is reduced at the other end. This results in a greater throttling of the pressure in the pilot valve 8.1. The closing body 14.1 moves in the closing direction of the first valve device 2 and throttles it

Fluid from the inlet chamber 17.1 to the connection 22 to the consumer, in particular the working chamber 19, in such a way that the closing body 14.1 is kept in a floating state. In this state, fluid flows from the inlet chamber 17.1 through the main valve 9.1 and the bypass via the two throttles 27.1 and 8.1 to the connection 22 to the

Consumer, that is, the Chamber of Labor 19. Taking into account the Operating times, the actuating magnet 5.1 of the first valve device 2 is de-energized in good time and the pilot valve 8.1 is thereby completely closed in good time, which finally leads to the closing of the main valve 9.1 of the first valve device 2 with the increase in pressure in the pilot chamber 26.1, so that when the

Main valve 9.1 the intended consumer pressure is reached. To hold the pressure in the working chamber 19 and thus in the connection 22 to the consumer, the actuating magnet 5.2 of the second valve device remains energized and the actuating magnet of the first valve device 2 is de-energized.

The pressure in the inlet 22 to the consumer is reduced in a similar manner with the second valve device 3, in particular the actuation of the actuating magnet 5.2. The actuating magnet 5.1 of the first valve device 2 remains de-energized during this phase. By

Lowering the current supply on the actuating magnet 5.2 of the second valve device opens the pilot valve 8.2, in particular the controllable throttle, and reduces the pressure from the pilot chamber 26.2 of the second valve device 3. The main valve 9.2 opens and releases fluid from the consumer to the atmosphere.

The pressurized surfaces effective on the closing bodies 14.1 and 14.2, in conjunction with the position and the width of the control area of the pilot valve device, cause a pressure change in partial areas in the chamber to the consumer, i.e. in the working chamber 19 only via the throttles 27.1, 8.1 in the closing body 14.1 or 27.2, 8.2 is reached in the closing body 14.2. This enables a sensitive adjustment in the border areas. According to a further aspect of the invention, according to FIG. 2, there is the possibility of expanding the valve combination 1 shown in FIG. 1 by a device 47 for detecting the pressure in the working chamber 19. This offers the possibility of offering a valve combination 1 with pressure detection device 47 as an independently tradable structural unit 48, which can be easily integrated into control or regulating devices.

In a further development of the embodiment according to FIGS. 1 or 2, an electronic control device 49 is integrated into the combined valve device 1. Thus, as shown in FIG. 3, there is the possibility of creating a pressure control module.

LIST OF REFERENCE NUMBERS

1 Combined valve device

2 first valve device 3 second valve device

4.1, 4.2 means for electromagnetic actuation

5.1, 5.2 actuating magnet

6.1, 6.2 anchor

7.1, 7.2 pilot valve body 8.1, 8.2 pilot valve

9.1, 9.2 main valve

10.1, 10.2 main valve member

11.1 Fixed seat of the main valve 9.1

11.2 Fixed seat of the main valve 9.2 12.1, 12.2 pilot valve member

13.1, 13.2 structural unit

14.1, 14.2 closing body

15.1, 15.2 piston element

16.1, 16.2 shaft 17.1 inlet chamber of the first valve device 2

17.2 Inlet chamber of the second valve device 3

18.1 outlet chamber of the first valve device 2

18.2 Outlet chamber of the second valve device 3 19 Working chamber 20.1 First connection of the first valve device 2

20.2 first connection of the second valve device 3

21.1 second connection of the first valve device 2

21.2 second connection of the second valve device 3 22 connection to the consumer 23 inlet

24 Connection to the relief room 25 housing

26.1, 26.2 pilot chamber

27.1, 27.2 connecting channel between the inlet chamber and

Pilot chamber 28.1, 28.2 connecting channel between pilot chamber and

Pilot valve 29.1, 29.2 ^• Community channel 30.1, 30.2, channel 31.1, 31.2, partial area 32.1, towards the inlet chamber 23, the end face on the closing body

14.1 32.2 facing the working chamber 19 end face on the closing body

14.2

33.1 face away from the inlet chamber 23 on the closing body

33.2 face away from the working chamber 19 on the closing body

34.1, 34.2 two-part insert

34.11 first single element of the two-part insert of the first valve device

34.12 second insert element of the two-part insert of the first valve device

34.21 first insert element of the two-part insert of the second valve device 34.22 second insert element of the two-part insert of the second valve device 35 inner wall

35.1, 35.2 inner wall area

36 basic housing element

37 cover element

38 head start 39 partial area

40. sealing device

41 second sealing device

42.1, 42.2 support surface 43.1 inner contour

44.1, 44.2 connecting channel

45.1, 45.2 through opening

46.1, 46.2 through opening on the sealing device

47 device for detecting the pressure 48 structural unit

49 control device

Claims

claims 1-. Valve device (2, 3), in particular electromagnetically actuated valve device (2, 3); 1.1 with a housing (25); 1.2 with an actuating device (4.1, 4.2); 1.3 with a main valve (9.1, 9.2) arranged between an inlet chamber (17,1, 17.2) and an outlet chamber (18.1, 18.2), comprising a main valve member (10.1, 10.2) and a fixed valve seat (11.1, 11.2); 1.3 with a pilot chamber (26.1, 26.2); 1.4 the pilot chamber (26.1, 26.2) is connected to the outlet chamber (12.1, 12.2) via a pilot valve (8.1, 8.2), comprising at least one pilot valve member (12.1, 12.2) and a valve body (12.1, 12.2) connected to the electromagnetic actuating device (4.1, 4.2) 17.2) and connected to the inlet chamber (17.1, 17.2) via at least one connecting channel (27.1, 27.2) with a channel cross-section that cannot be changed during operation; 1.5 main valve member (10.1, 10.2) and the pilot valve member (12.1, 12.2) are combined in a structural unit (13.1, 13.2), so that a movement of the main valve member (10.1, 10.2) in the opening direction of the main valve (9.1, 9.2) is simultaneously a movement of the pilot valve member (12.1, 12.2) in the closing direction of the pilot valve (8.1, 8.2); characterized by the following features: 1.6 the stationary seat (11.1, 11.2) of the main valve (9.1, 9.2) is formed by an at least two-part insert (34.1, 34.2) which can be clamped into the housing of the valve device (2, 3); 1.7 the pilot chamber (26.1, 26.2) is assigned to the main valve member (10.1, 10.2) such that the main valve member (10.1, 10.2) at least in a partial area of it in the flow direction of the Pressure medium considers oppositely aligned surfaces (32.1, 32.2, 33.1, 33.2) are each acted upon by the pressure prevailing in the inlet chamber (17.1, 17.2) and the pressure prevailing in the pilot chamber (26.1, 26.2); 1.8 the pilot chamber (26.1, 26.2) is connected to the inlet chamber (17.1, 17.2) and the pilot valve (8.1, 8.2) via at least one connecting channel (27.1, 27.2) extending through the structural unit (13.1, 13.2); 1.9 the connection between the pilot valve (8.1, 8.2) and Outlet chamber (18.1, 18.2) takes place via at least one connecting channel (44.1, 44.2) arranged outside the structural unit (13.1, 13.2) in the housing (25) or in the insert (34.1, 34.2). 2. Valve device (2, 3) according to claim 1, characterized in that the structural unit (13.1, 13.2) by forming the main valve member (10.1, 10.2) and the pilot valve member (12.1, 12.2) on a one-piece closing body (14.1, 14.2) is produced. 3. Valve device (2, 3) according to claim 2, characterized by the following features: 3.1 the closing body (14.1, 14.2) has a first piston-like End area (15.1, 15.2) and a shaft adjoining this (16.1, 16.2); 3.2 the piston-like end region (15.1, 15.2) forms the main valve member (10.1, 10.2); 3.3 the pilot valve member (12.1, 12.2) is from the piston type End region (15.1, 15.2) groundbreaking end region of the shaft (16.1, 16.2). 4. Valve device (2, 3) according to one of claims 1 to 3, characterized in that seated on the surface areas of main valve member (10.1, 10.2) or main valve (11.1, 11.2) and / or pilot valve member (12.1, 12.2.) ) or pilot bodies (7.1, 7.2) sealing devices are arranged. 5. Valve device (2, 3) according to one of claims 1 to 4, characterized in that the insert (34.1, 34.2) insertable insertable in the housing (25) is made in several parts, comprising at least one in the flow direction of the pressure medium from the Einiaßkammer (17.1, 17.2) viewed from first insert element (34.11, 34.21) and a second insert element (34.12, 34.22) arranged after it. 6. Valve device (2, 3) according to claim 5, characterized in that the fixed main valve seat (11.1, 11.2) is formed on the first insert element (34.11, 34.21). 7. Valve device (2, 3) according to claim 5 or 6, characterized in that the first insert element (34.11, 34.21) has a first region extending in the axial direction, which comes to rest on the housing inner wall (35) and a second, itself has in the inlet chamber (17.1, 17.2) extending area (38) which forms the main valve seat (11.1, 11.2). 8. Valve device (2, 3) according to one of claims 1 to 7, characterized in that the pilot chamber (26.1, 26.2) of an existing between the structural unit (13.1, 13.2) and the insert (34.1, 34.2), which by providing two sealing devices - a first sealing device (40.1, 40.2) and a second sealing device (41.1, 41.2) - between structural Unit (13.1, 13.2) and the insert (34.1, 34.2) is limited, is formed. 9. Ventiieinrichtung (2, 3) according to claim 8, characterized by the following features: 9.1 the pilot chamber (26.1, 26.2) is from the second Insert element (34.12, 34.22) of the insert (34.1, 34.2) and the structural unit (13.1, 13.2) consisting of the main valve member (10.1, 10.2) and pilot valve member (12.1, 12.2) limited; 9.2 between the second insert element (34.12, 34.22) and the structural unit (13.1, 13.2) the first and second sealing devices (40.1, 40.2, 41.1, 41.2) are arranged. 10. Ventiieeinrichtung (2, 3) according to claim 9, characterized by the following features: 10.1 the first sealing device (40.1, 40.2) is designed as a membrane which is attached to the end face (33.1, 33.2) of the main valve member (10.1, 10.2) facing away from the inlet chamber (17.1, 17.2) and to one of the two insert elements (34.11, 34.12, 34.21, 34.22) or between the first (34.11, 34.12) and the second Insert element (34.21, 34.22) is clamped; 10.2 the second sealing device (41.1, 41.2) between the structural unit (13.1, 13.2) and the second insert element (34.12, 34.22) comprises at least one O-ring. 11. Valve device (2, 3) according to one of claims 1 to 10, characterized in that the pilot chamber (26.1, 26.2) is connected to the pilot valve (8.1, 8.2) via at least one connecting channel (28.1, 28.2). 12. Valve device (2, 3) according to one of claims 1 to 11, characterized in that the connecting channels between the pilot chamber (26.1, 26.2) and the inlet chamber (17.1, 17.2) and pilot chamber (26.1, 26.2) and pilot valve (8.1, 8.2) in at least one channel axially through the structural unit (29.1, 29.2), which extends from the end face (32.1, 32.2) of the main valve member (10.1, 10.2) facing the inlet chamber (17.1, 17.2) through the structural unit (13.1, 13.2) to the end region of the stem (16.1, 16.2) extends and is coupled to at least one channel (30.1, 30.2) opening into the pilot chamber (26.1, 26.2). 13. Valve device (2, 3) according to one of claims 1 to 12, characterized in that the actuating device (4.1, 4.2) comprises at least one actuating magnet (5.1, 5.2) and an armature (6.1, 6.2) coupled to it. 14. Valve device (2, 3) according to claim 13, characterized in that the actuating magnet (5.1, 5.2) has an increasing stroke / current characteristic, ie is pulling. 15. Valve device (2, 3) according to claim 13, characterized in that the actuating magnet (5.1, 5.2) has a falling stroke / current characteristic, that is to say that it is pressing. 16. Valve device (2, 3) according to one of claims 1 to 15, characterized in that a sealing device is provided between the insert (34.1, 34.2) and the housing walls (35). 17. Valve device (2, 3) according to one of claims 1 to 16, characterized in that the inlet chamber (17.1) with a The pressure medium source can be connected and the outlet chamber (18.1) forms a working chamber (19) which can be coupled to a consumer. 18. Valve device (2, 3) according to one of claims 1 to 16, characterized in that the inlet chamber (17.2) is formed by a working chamber (19) which can be coupled to a consumer, and the outlet chamber (18.2) with a release space is connectable. 19. Combined valve device (1) 19.1 with a first valve device (2), in particular an electromagnetically actuated valve device (2) according to claim 17; 19.2 with a second valve device (3), in particular electromagnetically actuated valve device (3) according to claim 18. 20. Combined valve device (1) according to claim 19, characterized by the following features: 20.1 with at least three connections (23, 22, 24) coupled to the chambers (17.1, 17.2, 18.1, 18.2) of the valve devices (2, 3); 20.2 the inlet chamber (17.1) of the first valve device (2) can be coupled to a pressure medium source; 20.3 the outflow chamber (18.1) of the first valve device (2) and the The inlet chamber (17.2) of the second valve device (3) can be coupled to at least one consumer; 20.4 the outlet chamber (18.2) of the second valve device (3) is formed by a relief chamber which is coupled to a relief space. 21. Combined valve device according to claim 20, characterized in that the inlet chamber (17.2) of the second valve device (3) and the outlet chamber (18.1) of the first valve device (2) are formed by a working chamber (19), which two valve devices (2, 3) and which can be coupled to at least one connection (22) with one or more consumers. 22. Combined valve device (1) according to claim 21, characterized in that the connections (22) to the consumer in one Block are summarized. 23. Combined valve device (1) according to one of claims 19 to 22, characterized in that the actuating device (4.1, 4.2) and the closing body (14.1, 14.2) of the two Valve devices (2, 3) are constructed and dimensioned identically. 24. Combined valve device (1) according to one of claims 19 to 23, characterized in that the insert part elements (34.11, 34.12, 34.21, 34.22) of the two valve devices (2, 3) are constructed and designed such that they are supported against one another. 25. Combined valve device (1) according to one of claims 19 to 24, characterized in that the partition between the two valve devices (2, 3) is formed in each case by one of the insert elements (34.11, 34.12, 34.21, 34.22) of the two valve devices (2, 3). 26. Combined valve device (1) according to one of claims 19 to 25, characterized in that the two valve devices (2, 3) have a common membrane to limit the pilot chambers (26.1, 26.2) between the closing bodies (14.1, 14.2) and the inserts (34.1, 34.2). 27. Combined valve device (1) according to one of claims 19 to 26, characterized in that a device (47) for detecting the pressure is arranged in the working chamber (19). 28. Combined valve device (1) according to one of claims 19 to 27, characterized in that it forms a structural unit with a control unit (49).