WO2024061186A1 - Control valve - Google Patents

Abstract

A control valve. The control valve comprises a valve body (1), a valve core (2), and a sealing member (3); the valve body (1) is provided with a valve cavity; part of the valve core (2) and the sealing member (3) are arranged in the valve cavity; the valve core (2) comprises a rotating shaft (21) and a core body (22) connected to the rotating shaft (21); the core body (22) comprises a main body (221) and a flange portion (222); in the axial direction of the rotating shaft (21), the flange portion (222) is located on two sides of the main body (221); the peripheral sidewall of the flange portion (222) is provided with an arc-shaped surface (2221) and a first surface (2222); the sidewall of the sealing member (3) facing the main body (221) is provided with a sealing surface (31) and a second surface (32); the sidewall of the main body (221) facing the sealing member (3) comprises a matching surface (2211). On the vertical section of the control valve, the vertical distance between the arc-shaped surface (2221) and the axis of the valve core (2) is greater than the vertical distance between the first surface (2222) and the axis of the valve core (2). According to the control valve, the duration for which the sealing surface (31) of the sealing member (3) is worn is reduced, wear of the sealing member (3) is retarded, and the service life of the sealing member (3) is prolonged.

Description

Control valve

This application claims priority to the Chinese patent application filed with the China Patent Office on September 19, 2022, with application number 202211139419.6 and the invention name "Control Valve", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of valve body technology, and in particular to a control valve.

Background technique

Generally, a control valve includes a valve core, a valve body and a sealing assembly. The sealing assembly is located between the valve body and the valve core to enable the control valve to have a better seal. Among them, the sealing component includes a sealing block. In order to reduce internal fluid leakage, the sealing block is close to the surface of the valve core. As the valve core continues to rotate, the valve core and the sealing block continue to rub, which can easily cause wear and tear on the surface of the sealing block. Defects such as damage will have a greater impact on the sealing performance of the control valve.

Contents of the invention

The purpose of this application is to propose a control valve that can reduce the wear time of the sealing surface of the seal, delay the wear of the seal, and extend the service life of the seal.

In order to achieve the above technical effects, the technical solutions of this application are as follows:

One embodiment of the present application discloses a control valve. The control valve includes a valve body, a valve core and a sealing member. The valve body has a valve cavity, and a portion of the valve core and the sealing member are located on the valve body. In the valve cavity, the valve core includes a rotating shaft and a core body connected to the rotating shaft. The core body includes a body and a flange portion. Along the axial direction of the rotating shaft, the flange portion is located on the On both sides of the body, the outer peripheral side wall of the flange portion has an arc surface and a first surface, and the side wall of the sealing member facing the body has a sealing surface and a second surface, and the body faces the sealing member. The side wall includes a mating surface; wherein: in the vertical section of the control valve, the vertical distance between the arcuate surface and the axis of the valve core is greater than the first surface and the axis of the valve core the vertical distance between them, the seal has a first sealing state and a second sealing state, in the first sealing state, the second surface is spaced apart from the first surface, and the mating surface is in contact with The sealing surface; in the second sealing state In this state, the second surface is in contact with the arc surface, and the matching surface is separated from the sealing surface.

The beneficial effects of the control valve according to the embodiment of the present application: because the valve core has a flange portion, and the outer peripheral side wall of the flange portion has an arc surface and a first surface, and in the vertical section of the control valve, the arc surface and The vertical distance between the axes of the valve core is greater than the vertical distance between the first surface and the axis of the valve core. The side wall of the seal facing the body has a sealing surface and a second surface, so that during the operation of the control valve, with the rotation As the shaft rotates, the seal has a first sealing state and a second sealing state, causing the sealing surface of the seal to be in intermittent contact with the mating surface of the body. Compared with keeping the sealing surface of the seal in constant contact with the mating surface of the body, In short, the embodiments of the present invention can better reduce the friction on the sealing surface of the seal during the operation of the control valve, reduce the wear degree of the seal, prolong the service life of the seal, reduce the leakage probability of the control valve, and improve control Valve operating reliability.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of the drawings

Figure 1 is a schematic diagram of the exploded structure of the control valve according to Embodiment 1 of the present application;

Figure 2 is a schematic structural diagram of the valve core of the control valve according to Embodiment 1 of the present application;

Figure 3 is a schematic structural diagram of the wear-resistant insert of the control valve according to Embodiment 1 of the present application;

FIG4 is a schematic structural diagram of a valve core of a control valve in a first position according to a first embodiment of the present application;

Figure 5 is a cross-sectional view of the structure shown in Figure 4;

Figure 6 is an enlarged schematic diagram of the area circled A in Figure 4;

Figure 7 is an enlarged schematic diagram of the area circled B in Figure 4;

Figure 8 is a schematic structural diagram of the valve core of the control valve in the second position according to Embodiment 1 of the present application;

Figure 9 is a cross-sectional view of the structure shown in Figure 8;

FIG10 is an enlarged schematic diagram of the circle C in FIG9;

Figure 11 is a schematic structural diagram of the valve core of the control valve in Embodiment 2 of the present application;

FIG12 is a cross-sectional view of the structure shown in FIG11;

Figure 13 is an enlarged schematic diagram of the area circled D in Figure 12;

Figure 14 is a schematic structural diagram of the valve core of the control valve in Embodiment 3 of the present application;

Figure 15 is a cross-sectional view of the structure shown in Figure 14;

Figure 16 is an enlarged schematic diagram of the area circled E in Figure 15;

Figure 17 is a schematic structural diagram of the valve core of the control valve in Embodiment 4 of the present application;

Figure 18 is a cross-sectional view of the structure shown in Figure 17;

Figure 19 is an enlarged schematic diagram of the area circled F in Figure 18;

Figure 20 is a schematic structural diagram of the valve core of the control valve in the third position according to Embodiment 5 of the present application;

Figure 21 is a cross-sectional view of the structure shown in Figure 20;

Figure 22 is an enlarged schematic diagram of the area circled G in Figure 21;

Figure 23 is a schematic structural diagram of the valve core of the control valve in the fourth position according to Embodiment 5 of the present application;

Figure 24 is a cross-sectional view of the structure shown in Figure 23;

Figure 25 is an enlarged schematic diagram of the area circled H in Figure 24;

Figure 26 is a schematic structural diagram of the valve core of the control valve according to Embodiment 5 of the present application.

Reference signs:

1. Valve body; 11. Inlet; 12. First outlet; 13. Second outlet; 2. Valve core; 21. Rotating shaft; 22. Core body; 221. Body; 2211. Fitting surface; 2212. Conducting part ; 22121, conductive cavity; 2213, blocking part; 222, flange part; 2221, arc surface; 2222, first surface; 3, seal; 31, sealing surface; 32, second surface; 33, third A seal; 34, a second seal; 4, a wear-resistant insert; 41, an embedded section; 42, a straight section; 43, a gap; 5, a sealing block; 6, an elastic member.

Detailed ways

In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the present application will be further described below with reference to the accompanying drawings and through specific implementations. In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "vertical", "horizontal", "axial", "radial", "circumferential", etc. are based on those shown in the accompanying drawings. The orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application. In addition, features defined by "first" and "second" may explicitly or implicitly include one or more of these features, which are used to distinguish and describe features without distinction of order or importance. In the description of this application, unless otherwise stated, "plurality" means two or more.

The specific structure of the control valve of the embodiment of the present application is described below with reference to Figures 1 to 26.

This application discloses a control valve. As shown in Figure 1, the control valve includes a valve body 1, a valve core 2 and a seal 3. The valve body 1 has a valve cavity, and part of the valve core 2 and the seal 3 are located in the valve cavity. inside, valve The core 2 includes a rotating shaft 21 and a core 22 connected to the rotating shaft 21. The core 22 includes a body 221 and a flange portion 222. The flange portion 222 is located on both sides of the body 221 along the axial direction of the rotating shaft 21. The outer peripheral side wall of the portion 222 has an arc surface 2221 and a first surface 2222. The side wall of the seal 3 facing the body 221 has a sealing surface 31 and a second surface 32. The side wall of the body 221 facing the seal 3 includes a mating surface 2211. In the vertical section of the control valve, the vertical distance between the arc surface 2221 and the axis of the valve core 2 is greater than the vertical distance between the first surface 2222 and the axis of the valve core 2 . First of all, it needs to be explained that according to the above, in the control valve in the prior art, during the rotation of the valve core, the side wall of the valve core is always in contact with the arcuate side wall of the seal, which will cause the valve core to The seals are always in a state of wearing each other, thereby reducing the service life of the seals. In this article, the vertical section of the control valve refers to the section obtained by cutting the control valve along the axis parallel to the control valve.

It can be understood that in this embodiment, the valve core 2 is provided with a flange portion 222, the flange portion 222 is provided with an arc surface 2221 and a first surface 2222, and the sealing member 3 has a sealing surface 31 and a second surface. 32. When the rotating shaft 21 drives the valve core 2 to rotate, both the arc surface 2221 and the first surface 2222 can move to a state corresponding to the second surface 32. Therefore, during the operation of the control valve, the sealing member 3 has a first sealing state corresponding to the first surface 2222 and the second surface 32 and a second sealing state corresponding to the arcuate surface 2221 and the second surface 32 . Specifically, in the first sealing state, the second surface 32 is spaced apart from the first surface 2222, and the mating surface 2211 is in contact with the sealing surface 31. In this sealing state, if the rotating shaft 21 drives the valve core 2 to rotate, the mating surface 2211 will rub against the sealing surface 31. In the second sealing state, the second surface 32 abuts the arcuate surface 2221, because in the vertical section of the control valve, the vertical distance between the arcuate surface 2221 and the axis of the valve core 2 is greater than the vertical distance between the first surface 2222 and the valve core 2. The vertical distance between the axes of the core 2. When the second surface 32 abuts on the arc surface 2221, the mating surface 2211 and the sealing surface 31 will separate. In this sealing state, if the rotating shaft 21 drives the valve core 2 When rotating, the second surface 32 will rub against the arc surface 2221, but there will be a gap between the mating surface 2211 and the sealing surface 31 so that no friction will occur. In this article, the mating surface 2211 and the sealing surface 31 will separate, which means that there is a gap between the mating surface 2211 and the sealing surface 31.

To sum up, during the operation of the control valve of this embodiment, the sealing surface 31 of the seal 3 and the mating surface 2211 of the body 221 are not always in contact with each other as in the prior art, but are in contact with each other when the rotating shaft 21 Intermittent contact during the rotation process can better reduce the friction on the sealing surface 31 of the seal 3 during the operation of the control valve, reduce the wear degree of the seal 3, and prolong the The service life of the seal 3 is long while reducing the leakage probability of the control valve and improving the working reliability of the control valve.

In some embodiments, the flange portion 222 includes a wear-resistant insert 4. The wear-resistant insert 4 is provided with an arc surface 2221 and a notch 43 to avoid the first surface 2222. The wear-resistant insert 4 is located on the diameter of the valve core 2. is located outside the flange portion 222 in the direction. It can be understood that, according to the foregoing description, during the operation of the control valve, in the second sealing state, the arc surface 2221 will contact the second surface 32 to cause friction. In this embodiment, the flange portion 222 A wear-resistant insert 4 is added on the wear-resistant insert 4, and the arc surface 2221 is provided on the wear-resistant insert 4. Compared with the flange portion 222, the wear-resistant insert 4 has better wear resistance, so that during the operation of the control valve, The wear-resistant insert 4 replaces the flange portion 222 to rub against the seal 3, thereby reducing the degree of wear of the flange portion 222 and extending the service life of the valve core 2.

In some specific embodiments, the body 221 is provided with a slot, and one end of the wear-resistant insert 4 is inserted into the slot and interference-fits with the slot. Therefore, the connection stability of the wear-resistant insert 4 and the body 221 can be ensured, and the relative movement between the wear-resistant insert 4 and the body 221 can be avoided, which may cause the wear on the second surface 32 to increase.

Optionally, the end face of the wear-resistant insert 4 is flush with the end face of the seal 3 or the end face of the wear-resistant insert 4 is set beyond the end face of the seal 3 , and the end face of the wear-resistant insert 4 is flush with the side surface of the flange portion 222 The end faces of the flat or wear-resistant insert 4 are arranged beyond the sides of the flange portion 222 . Therefore, in the axial direction of the rotating shaft 21, the wear-resistant insert 4 completely covers the seal 3, so that the wear-resistant insert 4 can completely replace the flange portion 222 in friction with the seal 3, that is, during the working process , the flange portion 222 does not rub against the seal 3 , thereby reducing the degree of wear of the flange portion 222 and extending the service life of the valve core 2 .

In some specific embodiments, the wear-resistant insert 4 and the body 221 are an integral injection molded structure. Compared with the interference plugging method, the integrated injection molding structure of the wear-resistant insert 4 and the body 221 can further improve the connection stability of the wear-resistant insert 4 and the body 221, thereby minimizing the possibility of interference between the wear-resistant insert 4 and the body 221. The relative motion causes the second surface 32 to suffer increased wear.

It should be noted here that in other embodiments of the present application, the wear-resistant insert 4 can also be connected to the flange portion 222 by bonding or other methods, and is not limited to the plug-in connection and integral injection molding of this embodiment. Connection method.

In some embodiments, the seal 3 includes a wear insert 4 facing the flange portion. The outer side wall of 222 forms the second side 32 . It can be understood that, according to the above description, during the operation of the control valve, in the second sealing state, the arc surface 2221 will contact the second surface 32 to cause friction. In this embodiment, on the seal 3 A wear-resistant insert 4 is added, and the second surface 32 is provided on the wear-resistant insert 4. Compared with the seal 3, the wear-resistant performance of the wear-resistant insert 4 is more superior, so that during the operation of the control valve, the wear-resistant The insert 4 replaces the seal 3 to cause friction with the flange portion 222 , thereby reducing the wear degree of the seal 3 and extending the service life of the seal 3 .

In some specific embodiments, the seal 3 includes a wear-resistant insert 4. The wear-resistant insert 4 includes an embedded segment 41 and a straight segment 42. The embedded segment 41 is inserted into the seal 3, and the straight segment 42 is connected to the embedded segment 41. And the side wall of the straight section 42 facing the body 221 forms the second surface 32 . It can be understood that the embedded section 41 can ensure the stability of the connection between the wear-resistant insert 4 and the seal 3 , while the straight section 42 replaces the main structure of the seal 3 to rub against the flange portion 222 , reducing the friction of the seal 3 . The degree of wear of the main structure extends the service life of the seal 3.

Optionally, the extension direction of the embedded section 41 and the extension direction of the straight section 42 are arranged at an angle. It can be understood that the embedded section 41 is inserted into the seal 3, the straight section 42 is connected to the embedded section 41, and the extending direction of the embedded section 41 and the extending direction of the straight section 42 are arranged at an angle, optionally, as shown in Figure 6 As shown, the angle between the embedded section 41 and the straight section 42 can be an obtuse angle, which can better improve the connection strength of the entire wear-resistant insert 4 and the seal 3, thereby ensuring the connection stability of the wear-resistant insert 4 .

Optionally, the end surface of the straight section 42 is flush with the end surface of the flange portion 222 or the end surface of the wear-resistant insert 4 is disposed beyond the end surface of the flange portion 222 . Therefore, in the axial direction of the rotating shaft 21, the wear-resistant insert 4 completely covers the flange portion 222, and the wear-resistant insert 4 can completely replace the seal 3 in friction with the flange portion 222, that is, during the working process , the sealing member 3 does not rub against the flange portion 222, which reduces the degree of wear of the sealing member 3 and extends the service life of the sealing member 3.

In some embodiments, both the flange portion 222 and the seal 3 include a wear-resistant insert 4, and the wear-resistant insert 4 provided on the flange portion 222 is provided with an arcuate surface 2221 and a notch to avoid the first surface 2222. 43. The wear-resistant insert 4 provided on the seal 3 forms the second surface 32 toward the outer wall of the flange portion 222. It can be understood that, according to the foregoing description, during the operation of the control valve, in the second sealing state, the arc surface 2221 will contact the second surface 32 to cause friction. In this embodiment, the flange portion 222 A wear-resistant insert 4 is added on the wear-resistant insert 4, and the arc surface 2221 is provided on the wear-resistant insert 4, and on the seal 3 A wear-resistant insert 4 is added to the outer wall of the flange 222 to form the second surface 32 . Compared with the flange 222 and the seal 3 , the wear-resistant insert 4 has better wear resistance than the flange 222 and the seal 3 . Superior, during the operation of the control valve, the two wear-resistant inserts 4 replace the flange part 222 to rub against the seal 3, reducing the wear degree of the flange part 222 and the seal 3, and prolonging the life of the valve core 2 and the seal. The service life of part 3.

Optionally, the end surface of the wear-resistant insert 4 provided on the flange portion 222 is flush with the end surface of the seal 3 or the end surface of the wear-resistant insert 4 is disposed beyond the end surface of the seal 3 and is disposed on the seal 3 The end surface of the wear-resistant insert 4 is flush with the end surface of the flange portion 222 or the end surface of the wear-resistant insert 4 is arranged beyond the flange portion 222 . In the axial direction of the rotating shaft 21, one wear-resistant insert 4 completely covers the flange portion 222, and the other wear-resistant insert 4 completely covers the portion of the seal 3 facing the flange portion 222, so that the two wear-resistant inserts 4 completely cover the flange portion 222. The insert 4 can completely replace the friction between the seal 3 and the flange part 222, that is, during the working process, the seal 3 does not rub against the flange part 222, reducing the degree of wear of the seal 3 and the flange part 222, and extending the time. The service life of the seal 3 and the valve core 2 is shortened.

In some embodiments, the wear-resistant insert 4 is a metal part. It is understandable that the use of a metal part as the wear-resistant insert 4 can improve the wear resistance of the wear-resistant insert 4, thereby further extending the service life of the seal 3 and the valve core 2. Of course, in other embodiments of the present application, the material of the wear-resistant insert 4 can be adjusted according to actual needs and is not limited to the metal part of this embodiment.

In some embodiments, the valve body 1 has a communication port close to the valve cavity, the body 221 includes a conductive part 2212 and a blocking part 2213, the conductive part 2212 has a conductive cavity 22121, and the conductive cavity 22121 can connect at least two The communication port is conductive, and the blocking part 2213 can close the communication port. The conducting part 2212 and the blocking part 2213 are arranged along the circumferential direction of the valve core 2; the number of the first surface 2222 is at least one, in the circumferential direction of the valve core 2 , the central angle range corresponding to at least one first surface 2222 falls within the central angle range corresponding to the mating surface 2211 of the blocking portion 2213.

It can be understood that during operation of the control valve, the conductive portion 2212 is used to connect at least two communication ports, so the portion of the mating surface 2211 located on the conductive portion 2212 may not be in close contact with the sealing surface 31 of the seal 3 , but the blocking part 2213 is used to close the communication port, so when the blocking part 2213 plays a blocking role, at least part of the mating surface 2211 located in the blocking part 2213 needs to be in close contact with the sealing surface 31 of the seal 3 , can prevent liquid from flowing into the communication port from the joint between the part of the mating surface 2211 located at the blocking portion 2213 and the sealing surface 31 of the sealing member 3 . In this embodiment , the central angle range corresponding to at least one first surface 2222 falls within the central angle range corresponding to the mating surface 2211 of the blocking portion 2213. According to the above, when the first surface 2222 and the second surface 32 are spaced apart, the mating surface 2211 Just in contact with the sealing surface 31. That is to say, during the actual operation of the control valve, when the first surface 2222 whose central angle range falls within the matching central angle range of the blocking portion 2213 and the second surface 32 of the seal 3 are spaced apart, the blocking will occur. The mating surface 2211 on the portion 2213 is just in contact with the sealing surface 31, that is, the position of the at least one first surface 2222 and the second surface 32 in this embodiment corresponds to the flow channel switching position of the control valve, that is, when the valve core 2 rotates When reaching the flow channel switching position (the flow channel switching position refers to the position where the communication status of the multiple communication ports of the control valve changes), the first surface 2222 is spaced apart from the second surface 32 on the seal 3, thus ensuring The communication port that needs to be closed when the flow channel switches the position can be stably and well closed by the blocking part 2213, ensuring the reliability of the control valve.

In some specific embodiments, the communication port includes an inlet 11, a first outlet 12 and a second outlet 13, the sealing member 3 includes a first sealing member 33 and a second sealing member 34, and the channel of the first sealing member 33 is in contact with the first sealing member 33. The outlet 12 is connected, and the channel of the second sealing member 34 is connected with the second outlet 13 .

It can be understood that during one of the working processes of the control valve, when the inlet 11 is connected to the first outlet 12, the second outlet 13 is closed, and the liquid can enter the control valve from the inlet 11, and then from the first outlet 12 outflow.

Specifically, the control valve has an all-pass working mode. In the all-pass working mode, the conduction cavity 22121 connects the inlet 11 and the first outlet 12, and the blocking part 2213 closes the second outlet 13. At this time, due to the inlet 11 and the first outlet 12, the When one outlet 12 is connected, the sealing surface 31 of the first seal 33 does not need to contact the mating surface 2211 of the conductive portion 2212. This is because in this working state, the liquid only needs to flow out from the first outlet 12, even if the second outlet 12 is connected. A small gap between the seal 33 and the conductive part 2212 will not affect the normal operation of the control valve, and the separation between the first seal 33 and the conductive part 2212 can also reduce the wear of the first seal 33, so At this time, it is only necessary for the second surface 32 of the first sealing member 33 to contact the arcuate surface 2221 so that the sealing surface 31 of the first sealing member 33 and the mating surface 2211 of the conductive portion 2212 are separated. Since the inlet 11 and the second outlet 13 are blocked at this time, the liquid cannot flow out from the second outlet 13. At this time, it is necessary to ensure the sealing between the blocking portion 2213 of the valve core 2 and the second seal 34. Therefore, at this time, it is necessary to make the second surface 32 of the second sealing member 34 and the first surface 2222 spaced apart, so that the sealing surface of the second sealing member 34 31 contacts the mating surface 2211 of the blocking portion 2213 to prevent liquid from penetrating into the second outlet 13 from the mating gap between the second seal 34 and the valve core 2 .

Similarly, when the conducting cavity 22121 connects the inlet 11 with the second outlet 13, the blocking portion 2213 closes the first outlet 12, the second surface 32 of the second seal 34 abuts against the arc surface 2221, and the sealing surface 31 of the second seal 34 is separated from the matching surface 2211 of the conducting portion 2212, the second surface 32 of the first seal 33 is spaced apart from the first surface 2222, and the sealing surface 31 of the first seal 33 abuts against the matching surface 2211 of the blocking portion 2213. In summary, the seal 3 includes the first seal 33 and the second seal 34, and when the control valve is in the switching process, the seal 3 on the circulation side is spaced apart from the conducting portion 2212 of the valve core 2, thereby reducing the wear of the seal 3, and the seal 3 on the blocking side is tightly fitted with the blocking portion 2213 of the valve core 2, thereby avoiding leakage of the control valve and ensuring the working reliability of the control valve.

In some specific embodiments, as shown in FIG26 , there are more than two first surfaces 2222, and the more than two first surfaces 2222 are spaced apart along the circumference of the flange portion 222. The control valve has a proportional working mode, in which the conducting cavity 22121 connects the inlet 11, the first outlet 12 and the second outlet 13.

It can be understood that when the control valve has a proportional adjustment function, the inlet 11 needs to be connected to the first outlet 12 and the second outlet 13 at the same time, and due to the characteristics of the proportional adjustment function, the liquid needs to be accurately controlled from the first outlet 12 and the outflow ratio of the second outlet 13, which means that although the inlet 11 is connected to the first outlet 12 and the second outlet 13, it is necessary to ensure that the first seal 33 and the second seal 34 are connected to the valve core 2 There is a good sealing effect between them, that is, the seal 3 of the first seal 33 and the second seal 34 needs to be in contact with the mating surface 2211 of the valve core 2 to prevent liquid from flowing from the first seal 33 and the second seal 34 The joint with the valve core 2 leaks out, thereby reducing the accuracy of proportional adjustment.

Therefore, in this embodiment, when the control valve is in the proportional working mode, the second surface 32 of the first sealing member 33 is spaced apart from one of the first surfaces 2222, and the sealing surface 31 of the first sealing member 33 is in contact with Mating surface 2211. In this way, the first seal 33 can closely cooperate with the valve core 2 to avoid liquid leakage. At the same time, the second surface 32 of the second seal 34 is spaced apart from the other first surface 2222, and the second surface 32 of the second seal 34 is spaced apart from the other first surface 2222. The sealing surface 31 of the sealing member 34 is in contact with the mating surface 2211 . In this way, the second sealing member 34 can closely cooperate with the valve core 2 to avoid liquid leakage.

In some embodiments, as shown in FIG. 2 , in the circumferential direction of the flange portion 222 , the corresponding central angle of the arcuate surface 2221 is greater than the corresponding central angle of the first surface 2222 . It can be understood that no matter whether the control valve functions to switch the conduction mode or the proportional adjustment function, the flow channel switching position occupies a relatively small stroke of the valve core 2 during the rotation of the valve core 2, and the seal 3 is required to ensure The sealing position can also be only the flow channel switching position. In this embodiment, the central angle corresponding to the arcuate surface 2221 is greater than the central angle corresponding to the first surface 2222. That is to say, during the operation of the control valve, the arcuate surface 2221 contacts the second surface most of the time. On the surface 32, only a small part of the first surface 2222 and the second surface 32 are spaced apart. That is, during the operation of the control valve, the mating surface 2211 is separated from the sealing surface 31 most of the time, and is separated from the sealing surface 31 a small part of the time. 31 abuts, thus greatly reducing the wear of the seal 3 while ensuring the function of the seal 3, extending the service life of the seal 3, and improving the reliability of the control valve.

What needs to be supplemented here is that when there are multiple first surfaces 2222, the central angle corresponding to the arcuate surface 2221 should be greater than the sum of the central angles corresponding to the multiple first surfaces 2222.

In some embodiments, as shown in Figure 2, at least one of first side 2222 and second side 32 is planar. It can be understood that in actual design, the first surface 2222 can be a flat surface or a concave surface. It only needs to be ensured that the vertical distance between the arc surface 2221 and the axis of the valve core 2 is greater than the vertical distance between the first surface 2222 and the valve core 2 The vertical distance between the axes is sufficient. Setting the first surface 2222 as a flat surface can facilitate processing and simplify the processing technology of the valve core 2. The second surface 32 can be designed into any shape according to actual needs. Designing the second surface 32 as a flat surface can facilitate processing and simplify the processing technology of the seal 3 .

In some embodiments, as shown in Figure 1, the control valve also includes a sealing block 5 and an elastic member 6. The sealing block 5 is installed in the valve cavity. The sealing block 5 abuts the inner wall of the valve body 1. Both ends of the elastic member 6 They are respectively in contact with the sealing member 3 and the sealing block 5 . It can be understood that the function of the elastic member 6 and the sealing block 5 is to ensure that the seal 3 can be stably attached to the valve core 2 when it needs to be attached, and to prevent the seal 3 from coming out of the valve body 1 . In this application, the material and shape of the sealing block 5 and the material and type of the elastic member 6 can be selected according to actual needs, and the specific parameters of the sealing block 5 and the elastic member 6 are not limited here.

The following describes the specific structures of the control valves in five specific embodiments of the present application with reference to Figures 1-26.

Example 1:

As shown in Figures 1 to 10, the control valve of this embodiment includes a valve body 1, a valve core 2 and a sealing member 3. A valve cavity is defined in the valve body 1. The valve body 1 has a connecting port close to the valve cavity. The connecting port includes an inlet 11, a first outlet 12 and a second outlet 13. The valve core 2 includes a rotating shaft 21 and a core body 22 connected to the rotating shaft 21, the core body 22 includes a main body 221 and a flange portion 222, the main body 221 includes a conducting portion 2212 and a blocking portion 2213, the conducting portion 2212 has a conducting cavity 22121, and can conduct at least two connecting ports, the blocking portion 2213 can close the connecting ports, the flange portion 222 is located on both sides of the main body 221 along the axial direction of the rotating shaft 21, the outer peripheral side wall of the flange portion 222 has an arcuate surface 2221 and a first surface 2222, the first surface 2222 is a plane, and on the vertical section of the control valve, the vertical distance between the arcuate surface 2221 and the axis of the valve core 2 is greater than the vertical distance between the first surface 2222 and the axis of the valve core 2. The seal 3 includes a first seal 33 and a second seal 34. The first seal 33 and the second seal 34 have the same structure. The first seal 33 is located between the valve core 2 and the wall surface where the first outlet 12 is located, and the first seal 33 is communicated with the first outlet 12. The second seal 34 is located between the valve core 2 and the wall surface where the second outlet 13 is located, and the second seal 34 is communicated with the second outlet 13. The specific structure is described by taking the first seal 33 as an example. The seal 3 is provided with a wear-resistant insert 4, which includes an embedded section 41 and a straight section 42. The embedded section 41 is inserted into the seal 3, and the straight section 42 is connected to the embedded section 41. The side wall of the straight section 42 facing the body 221 constitutes the second surface 32. The side wall of the seal 3 facing the body 221 has a sealing surface 31.

The control valve of this embodiment has a full-through working mode. In the full-through working mode, the valve core 2 is located in the first position, the conducting cavity 22121 connects the inlet 11 with the first outlet 12, the blocking portion 2213 closes the second outlet 13, the second surface 32 of the first sealing member 33 abuts against the arc surface 2221, and the sealing surface 31 of the first sealing member 33 is disengaged from the mating surface 2211 of the conducting portion 2212, the second surface 32 of the second sealing member 34 is spaced apart from the first surface 2222, and the sealing surface 31 of the second sealing member 34 abuts against the mating surface 2211 of the blocking portion 2213. When the conducting cavity 22121 connects the inlet 11 with the second outlet 13 and the blocking portion 2213 closes the first outlet 12, the second surface 32 of the second seal 34 abuts against the arc surface 2221, and the sealing surface 31 of the second seal 34 is disengaged from the mating surface 2211 of the conducting portion 2212; the second surface 32 of the first seal 33 is spaced apart from the first surface 2222, and the sealing surface 31 of the first seal 33 abuts against the mating surface 2211 of the blocking portion 2213.

When the control valve is in the non-full-pass working mode, the valve core 2 is in the second position, and when the valve core 2 rotates from the first position to the second position, the working mode can be switched. As shown in Figure 8-9, The second surface 32 of the first sealing member 33 is in contact with the arc surface 2221, and the sealing surface 31 of the first sealing member 33 is separated from the mating surface 2211. There is a gap between the sealing surface 31 of the first sealing member 33 and the mating surface 2211. gap. The second surface 32 of the second sealing member 34 is in contact with the arcuate surface 2221, and the sealing surface 31 of the second sealing member 34 is separated from the mating surface 2211. It should be noted that at this time, the state of the first sealing member 33 is the same as that of the second sealing member 34 , so FIG. 10 only shows the detailed structure of the first sealing member 33 .

Example 2:

As shown in Figures 11 to 13, the structure of the control valve in this embodiment is roughly the same as that in Embodiment 1. The difference is that the flange portion 222 and the seal 3 of the control valve in this embodiment are not provided with Wear-resistant inserts 4.

Embodiment three:

As shown in Figures 14-16, the structure of the control valve in this embodiment is roughly the same as that in Embodiment 1. The difference is that the flange portion 222 of the control valve in this embodiment is provided with a wear-resistant insert 4. The seal 3 is not provided with a wear-resistant insert 4 .

Embodiment 4:

As shown in Figures 17-19, the structure of the control valve in this embodiment is roughly the same as that in Embodiment 1. The difference is that the flange portion 222 and the seal 3 of the control valve in this embodiment are provided with Wear-resistant inserts 4.

In Embodiments 2 to 4, only one first surface 2222 is provided on the flange portion 222 of the valve core 2. The control valves in Embodiments 2 to 4 have an all-pass working mode. The specific working principle is the same as that in Embodiment 1. The working principles are basically the same and will not be described again here.

Embodiment five:

As shown in Figures 20-26, the structure of the control valve in this embodiment is roughly the same as that in Embodiment 1. The difference is that four first surfaces 2222 are provided on the flange portion 222 of the valve core 2 in this embodiment. , the four first surfaces 2222 are evenly spaced along the circumferential direction of the flange portion 222 . And the four first surfaces 2222 are arranged in pairs.

The control valve of this embodiment has a proportional working mode, and the valve core 2 is located in the third position, as shown in Figures 20 and 21. In the proportional working mode, the conduction cavity 22121 connects the inlet 11, the first outlet 12 and the second outlet. 13 is connected, between the second surface 32 of the first sealing member 33 and one of the first surfaces 2222 The sealing surface 31 of the first sealing member 33 is in contact with the mating surface 2211, and the second surface 32 of the second sealing member 34 is spaced apart from the other first surface 2222 arranged in a pair, and the second sealing member 34 The sealing surface 31 is in contact with the mating surface 2211. It should be noted that at this time, the state of the first sealing member 33 is the same as that of the second sealing member 34, so FIG. 22 only shows the detailed structure of the first sealing member 33.

When the control valve is in the non-proportional working mode, the valve core 2 is in the fourth position, and the valve core 2 rotates from the third position to the fourth position to achieve switching between the above two working modes, as shown in Figures 23 and 24. The first The second surface 32 of the sealing member 33 is in contact with the arcuate surface 2221, the sealing surface 31 of the first sealing member 33 is separated from the mating surface 2211, the second surface 32 of the second sealing member 34 is in contact with the arcuate surface 2221, and the second surface 32 of the second sealing member 34 is in contact with the arcuate surface 2221. The sealing surface 31 of the second sealing member 34 is separated from the mating surface 2211. It should be noted that at this time, the state of the first sealing member 33 is the same as that of the second sealing member 34, so FIG. 25 only shows the detailed structure of the first sealing member 33.

In the description of this specification, reference to the terms "some embodiments," "other embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one implementation of the application. example or examples. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above content is only the preferred embodiment of the present application. For those of ordinary skill in the art, there will be changes in the specific implementation mode and application scope based on the ideas of the present application. The content of this description should not be understood as a limitation of the present application. limits.

Claims (14)

Control valve, the control valve includes a valve body (1), a valve core (2) and a seal (3), characterized in that the valve body (1) has a valve cavity, and part of the valve core (2) The seal (3) is located in the valve cavity, and the valve core (2) includes a rotating shaft (21) and a core body (22) connected to the rotating shaft (21). The core body (22) includes a body (221) and a flange portion (222). Along the axial direction of the rotation shaft (21), the flange portion (222) is located on both sides of the body (221). The peripheral side wall of the edge (222) has an arc surface (2221) and a first surface (2222), and the side wall of the seal (3) facing the body (221) has a sealing surface (31) and a second surface. Surface (32), the side wall of the body (221) facing the seal (3) includes a mating surface (2211); Wherein: the vertical distance between the arc surface (2221) and the axis of the valve core (2) is greater than the vertical distance between the first surface (2222) and the axis of the valve core (2), The seal (3) has a first sealing state and a second sealing state. In the first sealing state, the second surface (32) is spaced apart from the first surface (2222), and the mating surface (2211) is in contact with the sealing surface (31); in the second sealing state, the second surface (32) is in contact with the arcuate surface (2221), and the mating surface (2211) and The sealing surface (31) is detached. The control valve according to claim 1, characterized in that the flange portion (222) includes a wear-resistant insert (4), and the wear-resistant insert (4) is provided with the arc surface (2221) ) and the notch (43) to avoid the first surface (2222), the wear-resistant insert (4) is located outside the flange portion (222) in the radial direction of the valve core (2) ; And/or, the seal (3) includes a wear-resistant insert (4), which forms the second surface (32) toward the outer wall of the flange portion (222). The control valve according to claim 2, characterized in that the end surface of the wear-resistant insert (14) is flush with the end surface of the seal (3), or the end surface of the wear-resistant insert (4) Set beyond the end face of the seal (3); The end surface of the wear-resistant insert (4) is flush with the side surface of the flange portion (222) or the end surface of the wear-resistant insert (4) is arranged beyond the side surface of the flange portion (222). The control valve according to claim 2, characterized in that a slot is provided on the body (221), and one end of the wear-resistant insert (4) is inserted into the slot and connected with the slot. slot interference fit; Alternatively, the wear-resistant insert (4) and the body (221) are an integral injection molded structure. The control valve according to claim 2, characterized in that the seal (3) includes a wear-resistant insert (4), and the wear-resistant insert (4) includes: Embedding section (41), the embedding section (41) is inserted into the seal (3); Straight section (42), the straight section (42) is connected to the embedded section (41), and the side wall of the straight section (42) facing the body (221) constitutes the second Face(32). The control valve according to claim 5, characterized in that the extension direction of the embedded section (41) and the extension direction of the straight section (42) are arranged at an angle. The control valve according to claim 5, characterized in that the end surface of the straight section (42) is flush with the end surface of the flange part (222), or the end surface of the wear-resistant insert (4) It is provided beyond the end surface of the flange portion (222). The control valve according to any one of claims 1 to 7, characterized in that the valve body (1) has a communication port close to the valve chamber, and the body (221) includes a conductive portion (2212) and a blocking part (2213). The conductive part (2212) has a conductive cavity (22121) and can conduct at least two of the communication ports. The blocking part (2213) can close the communication. The conductive part (2212) and the blocking part (2213) are arranged along the circumferential direction of the valve core (2). The control valve according to claim 8, characterized in that the number of the first surface (2222) is at least one, and in the circumferential direction of the valve core (2), at least one first surface (2222) ) falls within the central angle range corresponding to the mating surface (2211) of the blocking portion (2213). The control valve according to claim 8, characterized in that the communication port includes an inlet (11), a first outlet (12) and a second outlet (13), and the seal (3) includes a first seal (33) and a second sealing member (34). The channel of the first sealing member (33) is connected with the first outlet (12). The channel of the second sealing member (34) is connected with the second sealing member (34). Exit (13) connected; The control valve has an all-pass working mode. In the all-pass working mode, the conductive cavity (22121) connects the inlet (11) and the first outlet (12), and the blocking part (22121) 2213) Close the second outlet (13), the second surface (32) of the first sealing member (33) is in contact with the arcuate surface (2221), and the first sealing member The sealing surface (31) of (33) is separated from the mating surface (2211) of the conductive part (2212), and the second surface (32) of the second sealing member (34) is separated from the The first surfaces (2222) are spaced apart, and the sealing surface (31) of the second sealing member (34) is in contact with the The mating surface (2211) of the blocking part (2213); or: in the all-pass working mode, the conductive cavity (22121) connects the inlet (11) and the second outlet (13) , the blocking part (2213) closes the first outlet (12), and the second surface (32) of the second sealing member (34) is in contact with the arc surface (2221), And the sealing surface (31) of the second sealing member (34) is separated from the mating surface (2211) of the conductive part (2212), and the third sealing surface of the first sealing member (33) The two surfaces (32) are spaced apart from the first surface (2222), and the sealing surface (31) of the first sealing member (33) is in contact with the fitting of the blocking portion (2213). Face(2211). The control valve according to claim 10, characterized in that the number of the first surfaces (2222) is more than two, and the more than two first surfaces (2222) are distributed at intervals along the circumference of the flange portion (222); The control valve has a proportional working mode. In the proportional working mode, the conduction chamber (22121) connects the inlet (11), the first outlet (12) and the second outlet (13). , the second surface (32) of the first sealing member (33) is spaced apart from one of the first surfaces (2222), and the sealing surface (31) of the first sealing member (33) ) is in contact with the mating surface (2211), the second surface (32) of the second seal (34) is spaced apart from the other first surface (2222), and the second seal The sealing surface (31) of the component (34) is in contact with the mating surface (2211). The control valve according to any one of claims 1 to 7, characterized in that, in the circumferential direction of the flange portion (222), the corresponding central angle of the arcuate surface (2221) is greater than the The central angle corresponding to the first face (2222). The control valve according to any one of claims 1-7, characterized in that at least one of the first surface (2222) and the second surface (32) is a plane. The control valve according to any one of claims 1 to 7, characterized in that the control valve further includes a sealing block (5) and an elastic member (6), the sealing block (5) is installed on the valve In the cavity, the sealing block (5) is in contact with the inner wall of the valve body (1), and the two ends of the elastic member (6) are in contact with the sealing member (3) and the sealing block (5) respectively. ).