CN1018291B - Quick acting fluid line couplings - Google Patents

Abstract

A coupling, preferably designed as a quick-action coupling, has two sealing members (2, 3) whose sealing surfaces are made of a material having the same coefficient of thermal expansion, in particular a hard metal, and which are in a precise movable fit without conicity and pressure. Thus, no sealing rings are necessary, which is maintenance-free and troublesome and can be used in corrosive fluids and in wide temperature range applications.

Description

The present invention relates to a coupling, and more particularly to a fast-acting fluid line coupling.

This type of coupling is especially suitable for quick and tight connections of hoses or other flexible liquid conduits.

A coupling of this type is described in Swiss Patent No. CH-A-626696, which has two sealing members, one of which is designed as a plug valve and the other as a spigot valve, each with a coupling part, which The closed state can be driven by a spring member, and the sealing ring in each cavity is pressed against the inner conical surface of the sealing member by the sealing state. The sealing of the two sealing members is obtained by the sealing members pressing together the sealing rings of elastomeric material. In the coupled state, the coupling part can be locked in the released position by a locking nail device, so that there is no axial movement beyond its released position during pressure surges. This means that in the most unfavorable circumstances, the entire system is completely locked out to prevent the valve from closing. The two sealing members are locked by locking balls which, in the coupled state, are located in the grooves of the socket valve and sleeve. Additional slots in the sleeves that slide over plug and socket valves allow the balls to go into an unlatched position; these locking balls must be replaced when coupling and unmating, which can introduce problems such as contamination or seizure.

Sealing rings wear out rapidly and damage due to leakage can only be avoided by frequent periodic maintenance (replacement of sealing rings). In order to change the sealing ring, the entire coupling must be dismantled, which is laborious and time-consuming, and the plant must be shut down. Elastomeric sealing rings cannot be used in the presence of corrosive fluids or gases, high, low or large temperature fluctuations, and radioactivity. Hitherto, no coupling of this nature has been available in this state. Another disadvantage of this type of universal coupling is the large number of parts which makes it unreliable and expensive.

Another coupling of this type is described in French Patent No. FR-A-1288938 and Swiss Patent No. CH-A-474010, which has a sealing conical surface, an elastic sealing flange pressed against the conical face. Frequent opening and closing of the sealing member can cause wear of the sealing flanges and tapered surfaces, compromising the tightness of the overall coupling. If such a coupling is not frequently opened, the compressed sealing lug may adhere to the opposing surface, making it impossible to release the coupling without damaging it. In addition, when the two sealing members are pressed together, possible contamination between the tapered surfaces also makes it impossible to create a suitable tightness between them.

It is an object of the present invention to provide a maintenance-free coupling of simple design which can be used with corrosive fluids and over a wide temperature range. This coupling can be used especially in places with high temperature, low temperature and large temperature fluctuations, radioactivity, harsh environmental conditions and underwater.

According to the invention, this object is achieved by the method provided in the characterizing part of claim 1: namely a coupling, in particular a coupling with two connectable sealing members for connecting fluid lines, characterized in that the two sealing The sealing surface of the member is a cylindrical surface and/or a prismatic surface, which are separated from each other by dynamic fit, and the surface lines generated by the cylindrical surface or the prismatic surface are parallel to the axis of the coupling, so that in the connected state, they are not pressed against each other; The movement fit is made very small so that the fluid cannot leak from between the sealing surfaces.

The advantages of the present invention are fundamentally based on the fact that, contrary to popular practice, it does not use elastomeric sealing rings, conical sealing surfaces, or elastomeric flanges; eliminates maintenance requirements, allows for a simpler structure than popular couplings, and uses less The components are used to achieve the tightness of the sealing member, so only a few handling and processing steps are required when assembling and manufacturing.

Preferred embodiments of the coupling of the present invention are listed in claims 2-15

Embodiments of the coupling of the present invention are now described in more detail with reference to the accompanying drawings, in which:

Figure 1 is a longitudinal sectional view of a quick acting coupling in an uncoupled state,

Fig. 2 is a longitudinal sectional view of the coupler in a connected state,

Fig. 3 is a side view of the connecting part of the coupler,

Figure 4 is a partial view of the joint in the IV direction of Figure 3,

Fig. 5 is a longitudinal sectional view of a modified coupling in an uncoupled state

The quick-acting couplings shown in Figures 1-4 are used to connect liquids such as water or oil through the flexible pipes. It consists of two sealing components 2 and 3, the coupling component 2 being made like a plug valve and the component 3 being made like a socket valve. In the two sealing members 2 and 3, all elements, including the springs 6, 19 to be described later as well as the spring clip 14 and the locking ring 13 are all made of the same material, preferably steel, especially of high hardness and corrosion resistance. steel; therefore, their coefficients of thermal expansion are the same. The use of materials with the same coefficient of thermal expansion is necessary to maintain a positive fit of the sealing surfaces in the event of fluctuations in the temperature of the environment or fluid so that their gap width does not develop into an inseparable tight or leaky fit. Each sealing member 2 or 3 has a coupling portion 5 and a coil spring 6 serving as a sealing spring. The outer diameter of the coil spring 6 is selected to closely fit the diameter of the bore 35 or 36 as will be described below.

The plug valve 2 has a plug part 10 with a coaxial raised part 12 abutting against its front end part 16 which, when coupled along the front part 16, faces the spigot valve 3, followed by a groove 15. The spigot valve 3 has a spigot part 11 and six elastic tongues (14) with hook-shaped notches at their free ends, which are welded to a slot lock ring 13, said notches protruding beyond the front part 18 of the spigot part 11, The helical spring member 19 is slid over it. On each plug part 10 and socket part 11 a cover 7 is firmly screwed.

The slotted lock ring 13 is held securely in the coaxial groove 20 of the socket part 11 and the helical spring 19 is a sliding fit over the lock ring 13 and the tongue 14 over part of its length. One end of the coil spring 19 abuts against the protruding portion 24 of the socket portion 11, which is the radially extending edge of the groove 20 away from the front end 18, and the other end is supported on the substantially coaxial inner protruding portion 29 of the groove 17. on, approximately in the middle of it.

To carry out the coupling, the sleeve 17 is retracted manually against the force of the spring 19, the tongue 14 being elastic, and it can be pushed onto the raised portion 12 until seated in the groove 15. The elastic force of the spring 19 pushes the sleeve 17 back on the tongue 14 again, so that the tongue 14 cannot be bent radially outwards, and like this, the two sealing members 2 and 3 are fixed together in a manner that cannot be slid apart. Under the coupled and uncoupled state, the raised portion 29 is seated on the first inflection point of the tongue 14 extending from the lock ring 13 away from the coupling shaft, thereby preventing the sleeve 17 from sliding downwards, and also During assembly and disassembly by adding The increasing pressure pushes the sleeve 17 onto the resilient tongue 14 .

The front end 16 of the plug part 10 has a coaxial annular protrusion 21, and the front end 18 of the socket part 11 also has an inner coaxial annular protrusion 22 and an outer coaxial annular protrusion 23 forming an annular groove therebetween. The protruding part 21 has two cylindrical surfaces 25 and 26 and the inner protruding part 22 has a cylindrical surface 27 . The outer projection 23 has a cylindrical surface 28 which is a pair of surfaces 25 and 27 and 26 and 28 which are slidingly fitted together when the sealing members 2 and 3 are joined together. Between surfaces 25 and 27, the maximum gap is 5um, which is only the case for a helium seal (if used for water, the maximum gap width requirement is less stringent). The lines of the cylindrical pipe surfaces 25, 26, 27 and 28 are parallel to the axis of the plug-in valve 2 or 3, and therefore also parallel to the coupling axis, so the taper should be reduced as much as possible. The taper can only be a few points at most and cannot be exceeded, otherwise in When used as a quick coupler, the plug valve may become stuck in the socket valve.

The plug part 10 and the socket part 11 each have a coaxial bore 31 and 32 which are of the same diameter and which are flush and aligned with each other when coupled together. The edges of holes 31 and 32 are sharp corners without burrs. The length of the holes 31 and 32 corresponds substantially to one and a half times its diameter, which is slightly longer than the barrel length of the surface 25 or 27 . As will be described below, the lengths of the holes 31 and 32 and the barrel length of the surface 25 or 27 shown in FIG. 1 depend on the precision of machining and the desired sealing effect. Bore 31 opens into a hole with a coaxial inner surface 25 at the end facing front end 16, the inner diameter of which is the same as the outer diameter of annular projection 22 without considering the sliding fit, and hole 32 is in the annular projection 22 Extending inwardly, its total length is approximately equal to the sum of the length of the hole 31 plus the barrel length of the surface 25 .

Bores 31 and 32 extend, respectively, from radially stepped surfaces 42 perpendicular to the bore axis, into bores 35 and 36; bores 35 and 36 are substantially the same diameter, as are the axes of these bores and the axis of the sealing member. The diameters of the holes 35 and 36 are structurally determined by the diameter of a top cap (described later) of the coupling portion 5 housed therein and the diameter of the coil spring. The length of the hole 35 is derived from the following lengths: the length of the fully compressed helical spring 6, the thickness of the top cap 39, the length of the joint 40 of the coupling part 5 (described below), plus a few millimeters b. In order to make the fluid flow through the opening of the coupling part 5 and the guide member 41 (to be described later), it is necessary to add several millimeters b, which I will describe it later.

The axial length of the contact surface of the annular protruding parts 21, 22, 23 in a mutually sealed state is greater than the opening and the guide member in the coupled state and stretches out twice the coupling hole 31, 32 outer length b, so that when pulling apart and connecting While sealing the sealing members 2,3, the fluid cannot escape from the pipeline and/or the sealing members 2,3.

As shown in Figures 1 and 2, the cover 7 is made by connecting the coaxial threaded joint 43 to the coaxial hexagon nut. There is a hole 47 in the middle of the threaded joint 43, and it is formed on a radial wall 49 perpendicular to the axis of the hole. Extend into the axial internal threaded hole 50 in the hex nut. As mentioned above, the top cap 7 is screwed to the plug part 10 and the socket part 11 at the other end of the cap end 16 or 18 via the internal thread 50 and the external thread 52 respectively. In the assembled state, the cover 7 is firmly seated on the plug part 10 and the socket part 11 . The sealing is obtained by the wall 49 pressing the plug part and the other front end of the socket part away from the front end 16 or 18 . In order to be able to screw the cover 7 firmly onto the plug part 10 and the socket part 11 and unscrew it later, they are formed in the same way as the circular surfaces 54 or 55 of the sockets 10 and 11, i.e. the above-mentioned hex nuts 44 shapes.

A flexible pipe or hose (not shown) is secured to the sealing member 2 or 3, in the case shown in Figures 1 and 2, to one end of the threaded joint of the cover 7, of course with a hose clamp Securely clamp hose fittings in place of threaded fittings.

A disc-shaped top cap 39 forms a mushroom-shaped coupling portion 5 together with a cylindrical pin serving as a ram. The upper surface 60 and the lower surface 59 of the top cap are substantially parallel to each other and perpendicular to the shaft axis. The cutaway portions of the disc-shaped top cap 39 are portions 57 of two opposing circles which serve as spaces for fluid to flow through. In the uncoupled state, the lower surface 59 of the top cap 39 is pressed against the stop surface 42 by the helical spring 6 . The upper side 60 of the top cap 39 supports one end of the helical spring 6 . The push rod has three semicircular notches 56 at its end leaving the top cap, the notches are distributed around the circumference of the rod, and the length is two-thirds of the full length. The cross-sectional area of the two partial circles 57 is substantially equal to the area of the three recesses 56 through which the fluid flows in the coupled state. The joint 40 is designed cylindrically, it occupies only one-third of the length of the opening and guide member 41 . These length ratios are selected such that the fluid flows between the ends of the joint 40 and The flow into and out of three recesses 56 over a distance b between the surfaces 42 can be seen from FIG. 2 .

In Figures 1 and 2, the coupling parts 5 are rotated 90 degrees about their shaft axes from the position shown in Figure 3 in order to more clearly show the free and blocked passages of the fluid when coupled.

In the coupled state, the opening of the coupling part 5 and the guide member 41 are aligned with each other. When assembled, the coupling part 5 is free to rotate in the hole 31 or 32, and the sealing members 2 and 3 are also free to rotate. As a result, it is impossible to predict the time of the coupling state. How the sections between the notches 56 fit. There is a bevel at the front end of the opening and guide member 41, which prevents undulations in the fluid when the notches are turned relative to each other.

In the unconnected state, as shown in Figure 1, the joints 40 of the coupling part 5 are respectively inserted in the holes 31 and 32. When the fluid is water, the seal material is steel, and the pressure difference of the holes 31 and 32 is several tons, they The maximum moving fit gap is 5um; the size of this gap varies with the pressure difference of the contained fluid, the viscosity of the fluid, the available elastic force of the coil spring 6 of the length of the joint 40. In the case of surfaces 25-28, the taper of joint 40 and bores 31 and 32 cannot be more than a fraction of an angle.

On the one hand, the above-mentioned gap should be large enough to allow the coupling part 5 to slide easily, but on the other hand should be small enough to ensure a suitable seal against the fluid in the hole 36 . When the two sealing members 2 and 3 are not coupled when pulled apart, the member of the sealing spring 6 has to push the coupling part 5 forward as quickly as possible. This can be done anytime there is sufficient spring force, but only so much that the normal few Newtons of force can be exerted with two hands without much effort to push the two joint parts together.

In the above example, the dynamic fit for sealing is designed to be a maximum of 5 μm, which is achieved between a pair of sealing surfaces such as the connection hole 31 or 32 and the corresponding joint 40 . In the case of sealing surfaces with several radial complex arrangements, for example in the case of pairs of surfaces 61/62, 25/27, 63/64, 26/28, 65/66, the dynamic fit can rise to ten one-fifth of a millimeter.

For the amazing joint sealing effect obtained without any sealing ring and the sealing surfaces that are not pressed together, it may be explained as follows: there is a layer of fluid film in the annular gap between the hole 32 and the joint 40, due to its The adhesion effect makes it adhere to the inner wall of the hole 32 and Connection block 40 on. The friction of the connecting block 5 in the bore 32 is similar to the friction of lubricant in a pivot bearing. It is proportional to the viscosity coefficient of the sliding surface, the moving speed of the joint part 5 and the reciprocal of the gap width, and the speed of flow through the gap is proportional to the pressure gradient of the inner and outer surfaces, the cross-sectional area of the gap, a quarter of the gap width and the reciprocal of the viscosity coefficient is directly proportional, while the viscosity coefficient depends on the temperature of the fluid and its pressure. In conclusion, it can be assumed that such an amazing sealing effect is based on the physically non-ideal fluid adhesion and its properties (coefficient of viscosity, etc.).

When the coupling parts 5 move back and forth, in order to prevent them from jamming, they must be correctly guided to ensure their high precision. The correct guidance is obtained by means of the precise mating surfaces of the intersections between the notches 56 .

Surfaces 25 and 27, 26 and 28 seal fluid passing between the two sealing members, and as mentioned in the past, their tolerances are on the order of microns. The accuracy of these surfaces can be less, because here the seal is obtained in a radially complex manner by the following seals; these gaps are the two gaps between the surfaces 25/27 and 26/28, the holes 32 The additional clearance between the two radial surfaces 61 and 62 to surface 27 and the hole 31 to surface 25, the clearance between the two radial surfaces 63 and 64 from tables 27 to 28 and from 25 to 26, and the Radial surface 65 adjacent to surface 26 or radial surface 66 adjacent to surface 28 . The sealing effect of these pairs of surfaces 25/27, 26/28, 61/62, 62/63 and 65/66 is further improved by the fact that the passing liquid adds a suction effect on the fluid in the gap.

When decoupling, the sleeve 17 is pushed back by hand, and the sealing members 2 and 3 are pulled apart by overcoming the clamping force of the tongue 14 on the raised portion 12 . The coil spring 16 presses the coupling portion 5 out of the sealing members 2 and 3 substantially smoothly. The two openings and the guide member 41 are in contact with each other at their fronts, and the corresponding joint 40 slides into the corresponding connection hole 31 or 32, thus sealing off the liquid in the piping system behind the sealing member. The sealing member is only pulled so that the paired surfaces 25/27, 26/28, 63/64, 65/66, 61/62 no longer have a sealing effect, and about two-thirds of the full length of the joint 40 is placed in the hole 31 or 32 within. When dismantling, since the sealing surfaces of the joint are sealed before they are completely separated from each other, no liquid will be ejected. Then the coupling part 5 is further slid into the coupling holes 31 and 32 until Until the bottom 59 of the top cap 39 pushes onto the surface 42 .

When manufacturing the elements of the two seals 2 and 3, care must be taken to ensure that the surfaces 26 and 28, especially 25 and 27, are coaxial with one another and have as little taper as possible. This taper should not exceed a few minutes, since higher values will impair the operability of the coupling, which can cause jamming when the sealing member is pulled apart under high pressure. One advantage of these coaxial surfaces is that when the sealing members 2 and 3 are pushed together, dirt adhering to the surfaces 25/27 and 26/28 is pushed aside.

It has been found experimentally that when the sealing member is pulled to about half the length of the barrel on either surface 25 or 27, the seal is maintained. A seal can thus be obtained with the design of the two surfaces 25 and 27 described above.

The situation is similar for the sealing of the coupling part 5 , a taper of the surface of the joint 40 and of the axial connection hole 31 or 32 must also be avoided.

Top cap 39 can also have some holes except that it is made into above-mentioned shape, and the hole axis is substantially parallel to the rod axis, and can also be opened into a small cross-like hole. Its function is to bear against one end of the helical spring 6 and against the surface 42 when decoupling, so that the spring 6 does not push the coupling part 5 out of the corresponding sealing member 2 or 3 . Otherwise, the top cap 39 would have to be made such that liquid could flow through it or by it.

The three notches 56 can also be made into several notches and notches with shapes different from those shown in the figure, here only need to ensure guiding performance and proper flow. However, the form shown in the diagram has proven to be optimal.

Six elastic tongues 14 can also be three, four, five or more than six tongues. However, the six tongues ensure good guidance when pushed together.

In a simplified construction, the sealing surfaces 26 and 28 can also be omitted if there are no high sealing requirements for the connection.

The elastic tongue 14 is used together with the spring-loaded sleeve 17 to prevent the separation of the two sealing members together. As an alternative, as shown in FIG. There is an interface nut 74, the interface nut 74 has a coaxial step 75, and the sealing member 73 has a radial step 76 whose diameter is larger than the inner diameter of the radial step 75. Before installing the hose, the interface nut 74 is sleeved on the corresponding sealing member 73 on.

The arrangement of the annular protrusions 21 , 22 , 23 , the sleeve 17 and the tongue 14 is all possible to choose an asymmetrical shape such as an oval. The asymmetrical shape defines the relative positions of the sealing members 2 and 3. In addition, if the radial position of the coupling portion 5 to the corresponding sealing member 2 or 3 is determined so that the two openings and the recess 56 of the guide member 41 are aligned with each other, the maximum Traffic always occurs in the connected state. As an example, the coupling part 5 can be fixed in such a way that the top cap 39 has grooves or protrusions (not shown) near its edge which protrude into holes 35 or 36 (not shown).

If the annular protrusions 21, 22, 23, the sleeve 17 and the tongue 14 are made into different shapes, such as oval, triangular or polygonal different from cylindrical; this just makes it possible to manufacture a coupling with non-interchangeable sealing members . This makes it possible to install the entire coupling set, which eliminates the risk of interference with the individual sealing elements and the exchange fluid flow. If the sealing surfaces 25/27 and 26/28 are not made of cylindrical surfaces, but of cylindrical plus flat right-angled partial surfaces or only of prismatic surfaces, then the cylinders of the ring-shaped partial surfaces or their partial surfaces, or of the prismatic surfaces, are parallel For spigot or plug valve 2 or 3 shafts. Different diameters may also be used with different shapes. Alternatively, such a coupling could also be coded by matching holes and pins on one or more surfaces 61 , 63 , 66 of the socket 3 and one or more surfaces 62 , 64 , 65 of the plug part 2 . It is also possible to provide screw holes only on the surfaces 61-66, and to generate the required code, the user screws a pin and flat head screw into the appropriate hole flush with the surface.

If this quick-acting coupling does not use the coupling part 5 and the coil spring 6, this coupling can also be used as a simple coupling for connecting pipes.

The flow rate can be adjusted by the size of the cross-sectional area of the notch 56 , in other words, the flow rate can be set by inserting a coupling part having a corresponding cross-section of the notch 56 .

It is also possible to design holes 35 and 36 as connecting holes instead of connecting holes 31 and 32 . The top cap 39 of the coupling part 5 is coaxially designed similarly to the joint 40 , the opening and the guide member 41 . The holes 31 and 32 or 35 and 36 can also be designed so that they can take over the connecting and guiding functions. These bores now have axial grooves (not shown) on their inner surfaces away from the front part 16 or 18 for guiding fluid in the coupled state. The remainder of the hole is designed as a joint. If the top cap is designed as a joint, opening And the guide member, the unsealed spring 6 must be designed so that it no longer clings to the center spring of the top hat flange. This technical solution involves a more complex structure, for the large holes 35 and 36, compared with the holes 31 or 32, the exact fit is difficult and laborious.

Since the connecting part 5 adopts a stepped mushroom design, it functions as a variable voltage reducer. When there is no coupling, a continuous pressure drop is created which prevents excessive surges in the piping system to be disconnected.

Due to the special design of the coupling, flow-impeding internal threads are also avoided, and special care has been taken to provide bores 35 or 36 with smooth inner walls.

As stated earlier, the great advantage of the coupling or quick acting coupling of the present invention is the elimination of elastic sealing elements which must be specially interchanged and are subject to wear, depending of course on the fluids flowing, room temperature and other condition.

The sealing surfaces 25/27, 26/28, 31/40, 32/40, the connecting part 5, the plug and socket parts 10 and 11 are not only made of the same steel, but also can be treated with the same treatment method, especially the surface treatment method. Made of brass or aluminum. Instead of using the same hard metal, the coupling part 5 and the plug and socket parts 10 and 11 can also be made of hard plastic or only plastic-coated material.

During coupling, care must be taken to obtain a smooth flow without gaps and corners where some material may be deposited. For this reason, the coupling is especially suitable for use in the food sector. It is also used in the chemical industry and laboratories.

By proper design of the front faces 61-66 and 25-28 of the plug and socket valves 2 and 3, the coupling can also be used where air flows through it.

The quick acting couplings described in claims 6 and 8 can also be manufactured from light metals such as aluminium. Also can open a groove that is used for inserting sealing ring, preferably open on a corner of two surfaces 27 and 63 or 25 and 62. The coupling part 5 can also have a groove for securing the sealing ring, preferably on the top cap 59 and the joint 40 and a corner below.

Claims (15)

1. A fast-acting fluid pipeline coupling having two connectable sealing members (2, 3), characterized in that the sealing surfaces (25/27, 26/28) of the two sealing members (2, 3) ) are cylindrical surfaces and/or prismatic surfaces, which are separated from each other by dynamic fit, and the surface lines generated by the cylindrical surface or prismatic surface are parallel to the axis of the coupling, so that in the connected state, they are not pressed together, and the dynamic fit is done Small so that fluid cannot leak from between the covers (25/27, 26/28). 2. A quick-acting fluid line coupling according to claim 1, characterized in that the sealing surfaces (25/27, 26/28) are made of a hard metallic material having the same coefficient of thermal expansion, preferably the same. 3. A quick-acting fluid line coupling according to claim 1 or 2, characterized in that the two sealing members (2,3) each have a cylindrical bore (31,32) of the same diameter, and each has a Having at least one annular projection (21, 22, 23); in the coupled state, the holes (31, 32) are flush and snug with each other and aligned with each other; in the coupled state the annular projections (21, 22, 23) are sealed way together. 4. A quick-acting fluid line coupling according to claim 3, characterized in that the inner diameter of the annular projection (21) of a sealing member (2) is greater than the diameter of the hole (31), and that within the projection (21) There is at least one annular step (62) substantially perpendicular to the axis of the coupling between the surface (25) and the hole (31), and the hole (32) of the other sealing member (3) passes through its annular protrusion (22), Surrounded on its outer side (27) by an annular groove (27, 63, 28) which is adapted to receive a protrusion (21) of a sealing member (2), the sealing surface is formed by the annular protrusion of a sealing member (2) The inner surface (25) of part (21), and the outer surface (27) of the annular protrusion (22) of another sealing member (3), and the outer surface (21) of the protrusion (21) of one sealing member (2) 26) and the corresponding surface (28) of the annular groove (27, 63, 28) of another sealing member (3); a front surface (61) of the step (62) and the protrusion (22) and the annular groove ( 27, 63, 28) the substantially vertical annular bottom surface (63) and the annular front face of the projection (21) serve as stop surfaces for the two sealing members (2, 3). 5. A quick-acting fluid line coupling according to claim 1, characterized in that one sealing member has an external thread (71) and the other sealing member has a correspondingly matched interface nut (74) to prevent two The sealing member slides open. 6. A quick-acting fluid line coupling according to claim 1, characterized in that one of the two sealing members (2) has an outer coaxial ring (12), and the other member (3) has a plurality of elastic tongues ( 14), they are contained in the outside of this member, and its free end is bent into a hook shape, and in the connected state, they stretch out on the outer ring (12) to prevent the coupler from slipping away. 7. A quick-acting fluid line coupling according to claim 6, characterized in that the other sealing member (3) has a retractable retaining sleeve (17) which is made forward by spring (19) means Slide onto the tongue (14), when connecting; overcome the elastic force of the spring (19), the sleeve retracts to release the tongue (14), and then the sleeve is set forward by the spring (19) on the tongue tabs (14) such that their hooked ends are depressed to engage the loops (12). 8. A quick-acting fluid line coupling according to claim 1, characterized in that each sealing member (2, 3) has a coupling portion (5) loaded with a sealing spring (6), in the uncoupled state, It blocks the sealing members (2, 3) and loosens them in the connected state; the connecting part (5) has an opening, a guide member (41) and a joint (40), which are connected in the connecting holes of the sealing members (2, 3) ( 31, 32) inside the guide, in the coupled state, the opening and guide member (41) is located in the connecting hole (31, 32), and designed so that fluid can flow through them, the joint (40) is located in the connecting hole (31) in the coupled state , 32) outside, in the unconnected state, close to the connection holes (31, 32). 9. The quick-acting fluid pipe coupling according to claim 8, characterized in that the two coupling parts (5) are pressed against each other during coupling and move against the force of the sealing spring (6). In the coupling state, each The two sealing springs (6) are almost completely compressed by the coupling part (5), so that in the coupled state, the coupling parts (5) are firmly fixed together to prevent fluid pressure fluctuations. 10. A quick-acting fluid line coupling according to claim 8 or 9, characterized in that the coupling portion (5) is mushroom-shaped, and in the uncoupled state, the top cap (39) of the mushroom-shaped coupling portion (5) The lower side (59) is close to the stop part (42) of each sealing member (2, 3), the upper side (60) of the top cap (39) is made into the support of one end of the sealing spring (6), and the rod ( 40, 41) has at least one notch (56) for passing fluid, and the side surface of the top cap of the mushroom-shaped coupling part (5) is processed with guide holes (31, 32) Opening and guide member (41) and another part machined into joint (40). 11. A quick acting fluid pipe coupling according to claim 10, characterized in that the rod of the mushroom-shaped coupling part (5) is a cylindrical bolt, and the opening and guide member at the other end of the top cap (39) (41) has an axial notch (56) on the circumference, in the area of the top cap (39) there is at least one space for fluid passage. 12. A quick acting fluid line coupling according to claim 11, wherein the overall cross-sectional area of the recess in the stem is substantially equal to the overall cross-sectional area of the top hat region through which fluid passes. 13. A quick-acting fluid line coupling according to claim 10, characterized in that the coaxial second hole (35,36) is connected to the connection hole (31,32), and the two holes (31,32,35, 36) between the top hat (39) underside (59) stop in the form of an annular step (42), the opening and guide member (41) extending into the second hole (35, 36) in the coupled state . 14. A quick-acting fluid line coupling according to claim 13, characterized in that the top cap (39) is movable in the second hole (35, 36), the coil of the spring (6) is formed as a helical spring, It abuts against the second hole (35, 36), thus reducing the resistance to fluid flow in the second hole (35, 36). 15. The quick-acting fluid pipeline coupling according to claim 8, characterized in that the opening and guide member (41) protrudes out of the connecting hole (31, 32) in the connected state, and each of the two sealing members (2, 3) One has at least one annular protrusion (21, 22, 23), which cooperates with each other in a sealed manner in the coupled state, and the axial length of the contact surface of the annular protrusions (21, 22, 23) in the mutual sealing state is greater than the opening and the guide When the components are in the coupled state, they protrude twice the outer length (b) of the connection holes (31, 32), so that when the sealing components (2, 3) are pulled apart and connected, the fluid will not flow from the pipeline and/or the sealing components. (2,3) ran out.

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