Valve device

Abstract

The valve device comprises a connecting body, a valve element and a sealing piece, the connecting body is provided with a containing cavity and a communicating opening, the sealing piece is provided with a channel correspondingly communicating with the communicating opening, and at least part of the valve element is located in the containing cavity; the sealing element comprises an elastic part, the elastic part is arranged in the circumferential direction of the channel, the elastic part is compressed by the connecting body and the valve element, the sealing element is provided with a sealing groove, the sealing groove is arranged in the circumferential direction of the channel, the connecting body is attached to the elastic part to seal the sealing groove, and the elastic part is compressed to deform. The sealing grooves distributed in the circumferential direction of the channel exhaust air to form negative pressure, then the elastic part is better attached to the connecting body, and the sealing performance is improved.

Description

Technical Field

[0001] The invention relates to the field of fluid control, and in particular to a valve device. Background Art

[0002] The valve device includes a connector, a valve core and a seal. The seal has a channel connected to the connecting port of the connector. The seal is located between the connector and the valve core. How to design the valve device to improve the sealing performance of the valve device is an urgent problem to be solved. Summary of the invention

[0003] An object of the present invention is to provide a valve device to improve the sealing performance of the valve device.

[0004] One embodiment of the present invention discloses a valve device, which includes a connecting body, a valve core and a sealing member, wherein the connecting body has a accommodating cavity and a communicating port, the sealing member has a channel corresponding to the communicating port, and the valve core is at least partially located in the accommodating cavity; the sealing member includes an elastic portion, which is arranged circumferentially along the channel, the elastic portion is compressed by the connecting body and the valve core, the sealing member has a sealing groove, which is arranged circumferentially along the channel, and the connecting body fits the elastic portion to close the sealing groove.

[0005] A valve device provided according to one of the embodiments of the present invention includes a sealing member, which includes an elastic portion arranged along the circumference of a channel, the elastic portion having a sealing groove, the elastic portion of the seal is compressed by a connecting body and a valve core, the elastic member is compressed and deformed, and the sealing groove arranged along the circumference of the channel exhausts air to form a negative pressure, so that the elastic portion fits the connecting body more closely, thereby improving the sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic diagram of the overall internal structure of a valve device provided by an embodiment of the present invention;

[0007] Figure 2 It is a schematic diagram of the structure of various parts of a valve device provided by an embodiment of the present invention;

[0008] Figure 3 It is a schematic diagram of the structure of one channel of a valve device provided by an embodiment of the present invention;

[0009] Figure 4 yes Figure 3 An enlarged schematic diagram of S;

[0010] Figure 5 is a schematic structural diagram of one channel of a valve device provided by another embodiment of the present invention;

[0011] Figure 6 yes Figure 5An enlarged schematic diagram of N;

[0012] Figure 7 is a schematic structural diagram of a sealing elastic portion of a valve device provided by an embodiment of the present invention;

[0013] Figure 8 is a schematic structural diagram of a sealing elastic portion of a valve device provided by another embodiment of the present invention;

[0014] Fig. 9 yes Figure 5 Schematic diagram of the cross section in the MM direction;

[0015] Fig.10 is an angled schematic diagram of a first elastic portion and a second elastic portion of an embodiment of the present invention;

[0016] Fig.11 is a schematic structural diagram of an elastic portion of a valve device provided by another embodiment of the present invention;

[0017] Fig.12 is a schematic structural diagram of a sealing member of a valve device provided by an embodiment of the present invention from another perspective;

[0018] Fig.13 It is a schematic diagram of the sealing member and the connector structure of a valve device provided by an embodiment of the present invention;

[0019] Fig.14 is a schematic structural diagram of a limiting portion and a supporting portion of a valve device provided in an embodiment of the present invention;

[0020] Fig.15 is a schematic structural diagram of a support body according to another embodiment of the present invention;

[0021] 1. Connecting body; 2. Valve core; 3. Seal; 11. Closing cover; 12. Side wall; 13. Limiting rib; 31. Elastic part; 311. First elastic part; 312. Second elastic part; 3111. First surface; 3112. Second surface; 3121. Third surface; 3122. Fourth surface; 311a. First abutting part; 311b. First connecting part; 312a. Second abutting part; 312b. Second connecting part; 32. Base; 33. Peripheral wall; 34. Limiting part; 35. Supporting part; 351. Supporting body; 21. Upper partition; 22. Lower partition; 23. Vertical partition; 24. Middle partition; A. Accommodating chamber; B. Connecting port; C. Channel; D. Sealing groove; C1. First channel; C2. Second channel; a. First angle; b. Second angle. DETAILED DESCRIPTION

[0022] The features and exemplary embodiments of various aspects of the present invention will be described below. In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. In this article, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0023] The embodiment of the present invention provides a valve device, which can be applied to a vehicle thermal management system or an air conditioning system, and in particular can be applied to a coolant circulation loop of a vehicle. Specifically, the valve device can be used to control the on-off of a flow path in the coolant circulation loop and / or adjust the flow rate of the refrigerant.

[0024] Specifically, Figures 1 to 8 As shown, one of the valve devices provided by the embodiment of the present invention includes a connecting body 1, a valve core 2 and a sealing member 3, the connecting body 1 has a receiving cavity A and a communication port B, the sealing member 3 has a channel C corresponding to the communication port B, the valve core 2 is at least partially located in the receiving cavity A, at least a portion of the sealing member 3 is pressed between the connecting body 1 and the valve core 2, the connecting body can be a valve body or a flow channel plate, the connecting body includes a side wall portion 12, a bottom wall portion and a cover 11, the side wall portion 12, the bottom wall portion and the cover 11 limit The accommodating cavity A is fixed, the cover 11 is fixedly or positionally connected to the side wall 12, and the specific connection methods include screw connection, welding, and clamping. The communication port B is located at the side wall 12 or the bottom wall, and at least part of the seal 3 is pressed between the valve core 2 and the bottom wall or the side wall 12 of the connecting body 1; the seal 3 includes an elastic part 31, and the elastic part 31 is arranged circumferentially along the channel C, including but not limited to, the elastic part 31 surrounds the channel C, and the elastic part 31 is compressed between the connecting body 1 and the valve core 2. In this embodiment, It is not limited to the direct contact and compression of the connecting body 1 with the valve core 2 and the elastic part 31. It may be that additional components are generated on the connecting body 1 and the valve core 2 to compress the elastic part 31. The seal 3 has a sealing groove D, and the sealing groove D is arranged circumferentially along the channel C, including but not limited to, the sealing groove D surrounds the channel C, and the connecting body 1 is fitted with the elastic part 31 to close the sealing groove D. This embodiment is not limited to the direct contact and fitting of the connecting body 1 and the elastic part 31. It may also be that an additional component is fixedly connected to the connecting body 1, and the additional component is fitted with the elastic part 31 to seal the sealing groove D. When the seal 3 is pressed between the valve core 2 and the connecting body 1, the elastic part 31 is squeezed and deformed, and the air in the sealing groove D of the elastic part 31 is squeezed out, and negative pressure is formed in the sealing groove D, so that the elastic part 31 and the seal 3 are tightly fitted to the connecting body 1, and then the valve core 2 and the connecting body 1 at the connecting port B and the channel C are tightly fitted and sealed by the seal, thereby improving the sealing performance of the valve.

[0025] See also Figure 3 , Figure 4 and Figure 7 In this embodiment, the elastic part 31 includes a first elastic part 311 and a second elastic part 312. The second elastic part 312 is away from the center of the channel C relative to the first elastic part 311. The wall forming the sealing groove D includes the first elastic part 311 and the second elastic part 312. The first elastic part 311 and the second elastic part 312 are both arranged along the circumference of the channel C. The first elastic part 311 and the second elastic part 312 are preferably closed bodies. The closed body can be annular, frame-shaped or other closed polygons. Along the flow direction of the channel C, the projection of the closed body of the first elastic part 311 covers the projection of the wall of the channel C. The first elastic part 311 includes a first surface 3111 and a second surface 3112. The peripheral wall surface forming the channel C includes the first surface 3111. The wall surface forming the sealing groove D includes the second surface 3112 and the third surface 3121. The third surface 3121 is located at the second elastic part 312. The sealing groove D is squeezed by the first elastic part 311 and the second elastic part 312, thereby forming a negative pressure, so that the second surface 3112 and the third surface 3121 of the wall of the sealing groove D are adsorbed on the connecting body 1. Under the dual effects of the squeezing force of the first elastic part 311 and the second elastic part 312 and the adsorption force of the second surface 3112 and the third surface 3121, the sealing performance of the valve is significantly improved.

[0026] Further, see Figures 3 to 6In some implementations, in order to further improve the sealing performance of the seal, the seal 3 includes a base 32, an elastic part 31 and the base 32 as an integral structure, the elastic part 31 protrudes toward the connecting body 1 relative to the base 32, the first elastic part 311 and the second elastic part 312 protrude toward the connecting body 1 from one side wall of the base 32, and the other side wall of the base 32 is slidably matched with the valve core 2. Specifically, a side wall of the base 32 close to the valve core 2 is designed to be a thin film or a coating process is adopted, and the texture is smooth, which enhances the wear resistance of the seal 3 and reduces the friction between the base 32 and the valve core 2. The other side of the base 32 and the elastic part 31 are made of rubber products to increase the friction coefficient between the elastic part 31 and the connecting body 1. The first elastic portion 311 includes a first surface 3111 and a second surface 3112, the second elastic portion 312 includes a third surface 3121 and a fourth surface 3122, the peripheral wall surface forming the channel C includes the first surface 3111, the wall surface forming the sealing groove D includes the second surface 3112 and the third surface 3121, and the fourth surface is located on the side of the second elastic portion 312 away from the first elastic portion 311. When low-pressure fluid flows through the valve, the sealing of the valve mainly relies on the squeezing force of the first elastic part 311 and the second elastic part 312. When high-pressure fluid flows through the valve, the high-pressure fluid will exert a force on the first surface 3111 of the first elastic part 311 and the fourth surface 3122 of the second elastic part 312. Under the action of the force, the first elastic part 311 and the second elastic part 312 will approach each other, and then the first elastic part 311 and the second elastic part 312 will stand up relative to the base 32, that is, the first elastic part 311 and the second elastic part 312 tend to be perpendicular to the base 32, so that the squeezing force of the first elastic part 311 and the second elastic part 312 on the connecting body 1 increases. Therefore, when high-pressure fluid flows, the sealing performance of the valve will be further improved to meet the sealing requirements of the high-pressure fluid. In addition, when a plastic valve body or When a plastic flow channel plate is used as a connector, the sealing requirements of the high-pressure fluid need to be met, so the seal is generally compressed according to the sealing requirements of the high-pressure fluid. Therefore, no matter whether the fluid is a high-pressure fluid or a low-pressure fluid, the plastic valve body or the plastic flow channel plate will be squeezed and deformed. Long-term deformation will affect the resilience of the plastic valve body or the plastic flow channel plate, causing the extrusion pressure here to become smaller, and then the sealing performance is reduced. In this embodiment, only when the high-pressure fluid is circulated, the extrusion pressure of the seal 3 on the connector 1 increases to meet the sealing requirements of the high-pressure fluid. When the low-pressure fluid is circulated, the extrusion pressure of the seal 3 on the connector 1 is small, and the plastic valve body or the plastic flow channel plate will not produce a large deformation. Therefore, the impact on the resilience of the plastic valve body or the plastic flow channel plate is small, and the sealing performance of the valve will not be affected, thereby improving the life of the valve.

[0027] See also Figure 8 and Fig. 9In order to ensure that the sealing groove D of the elastic part 31 of the valve device is easy to exhaust during compression installation, and the elastic part 31 and the connecting body 1 fit more closely, the first elastic part 311 includes a first abutting part 311a and a first connecting part 311b, the first abutting part 311a fits with the connecting body 1, the first connecting part 311b is connected to the base 32, and the first connecting part 311b is connected to the first abutting part 311a. The first abutting part 311a is far away from the base 32 relative to the first connecting part 311b, and the first abutting part 311a is close to the center of the channel C relative to the first connecting part 311b, that is, along the flow direction of the channel C, the positive projection edge line of the first abutting part 311a is close to the center of the channel C relative to the positive projection edge line of the first connecting part 311b; further, the second elastic part 312 includes a second abutting part 311a and a first connecting part 311b. The connecting portion 312a and the second connecting portion 312b, the second abutting portion 312a is fitted with the connecting body 1, the second connecting portion 312b is connected to the base 32, the second connecting portion 312b is connected to the second abutting portion 312a, the second abutting portion 312a is far away from the base 32 relative to the second connecting portion 312b, and the second abutting portion 312a is far away from the center of the channel C relative to the second connecting portion 312b, that is, along the flow direction of the channel C, the positive projection edge line of the second abutting portion 312a is far away from the center of the channel C relative to the positive projection edge line of the second connecting portion 312b. In this embodiment, the cross-section of the first elastic portion 311 and the second elastic portion 312 is roughly trumpet-shaped. Of course, it is not limited to the above shape, and one of the first elastic portion 311 and the second elastic portion 312 can also be perpendicular to the base.

[0028] Further, see Fig.10 In the present embodiment, in order to ensure that the first elastic portion 311 and the second elastic portion 312 are in close contact with the connecting body 1, and when the high-pressure fluid flows, the first elastic portion 311 and the second elastic portion 312 can gather toward the sealing groove D direction, the inclined intersection of the first elastic portion 311 and the second elastic portion 312 is set, and the acute angle between the first elastic portion 311 and the base 32 is the first angle a, the first angle a is greater than 30° and less than 80°, and the acute angle between the second elastic portion 312 and the base 32 is the second angle b, the second angle b is greater than 30° and less than 80°; in the present embodiment, the angle of the first angle a and the second angle b is preferably 60° to 80°, or the angle between the outer peripheral surface of the base 32 and the first surface 3111 is preferably 68° to 73°, and the angle between the outer peripheral surface of the base 32 and the fourth surface 3122 is preferably 68° to 73°.

[0029] This embodiment mainly designs the seal of the column valve side wall, see Figure 1 , Figure 2 , Fig.12 and Fig.13The connecting body 1 includes a side wall portion 12, at least part of the sealing member 3 is pressed between the side wall portion 12 and the valve core 2, the sealing member 3 includes a peripheral wall portion 33, and the elastic portion 31 is located at the periphery of the peripheral wall portion 33. Of course, the sealing member 3 in this embodiment is also applicable to plane sealing, spherical sealing and other curved surface sealing.

[0030] Further, this embodiment is applicable to the sealing of a multi-way column valve. The sealing member 3 has a plurality of channels C. The elastic portion 31 includes a first elastic portion 311 and a second elastic portion 312. The first elastic portion 311 and the second elastic portion 312 are arranged circumferentially along the channel C. Each wall forming the channel C includes a first elastic portion 311. The enclosed space of the second elastic portion 312 is provided with one or more first elastic portions 311. Figure 8 In this embodiment, a first elastic portion 311 and a second elastic portion 312 are provided on the peripheral wall portion 33 of each channel C; see Figure 7 and Fig.11 In this embodiment, due to the miniaturized design of the valve, the space between the multiple channels C is small, and a first elastic portion 311 can be selected to be provided on the peripheral wall portion 33 at the multiple channels C. A second elastic portion 312 is provided on the side away from the center of the multiple first elastic portions 311, and multiple first elastic portions 311 are provided in the enclosed space of the second elastic portion 312. This not only ensures the miniaturization of the valve, but also reduces the processing cost.

[0031] See also Figure 7 In order to shorten the overall height of the valve and ensure that a certain degree of error is allowed during the rotation of the valve core 2, that is, to ensure that the vertical partition 23 of the valve core 2 abuts against the peripheral wall portion 33 between the channels C of the sealing member 3 within a certain rotation angle, in this embodiment, the sealing member 3 includes multiple groups of channels C, each group of channels C includes a first channel C1 and a second channel C2, the first channel C1 is located on the upper side, along the axial direction of the valve core 2, the orthographic projections of the multiple groups of channels C are arranged at intervals along the circumferential direction of the valve core 2, specifically, there are four groups of channels C, each group is provided with two, namely the first channel C1 and the second channel C2, the orthographic projections of the first channel C1 and the second channel C2 overlap, and the wall forming the first channel C1 and the wall forming the second channel C2 both include a first elastic portion 311, and the two first elastic portions 311 are located in the enclosed space of the same second elastic portion 312.

[0032] See also Fig.12 and Fig.13Since the outer periphery of the peripheral wall portion 33 of the sealing member 3 is provided with an elastic portion 31 protruding toward the connecting body 1, the area on the peripheral wall portion 33 without the elastic portion 31 will be greatly deformed under the extrusion of the valve core 2 and the connecting body 1. This area is mainly located between the limiting portion 34 and the elastic portion 31 of the sealing member 3. It is mainly because the vertical partition 23 of the valve core 2 squeezes the above-mentioned area of ​​the sealing member 3 to form a depression. In this embodiment, the sealing member 3 has a limiting portion 34. Along the circumferential direction of the valve core 2, the limiting portions 34 are located at both ends of the peripheral wall portion 33. The side wall portion 12 of the connecting body 1 is provided with a limiting rib 13, and the limiting portion 34 abuts against the limiting rib 13. On the outer periphery of the peripheral wall portion 33, a supporting portion 35 is provided between the limiting portion 34 and the elastic portion 31, and the supporting portion 35 abuts against the side wall portion 12 of the connecting body 1. It should be pointed out that the sealing member 3 in this embodiment is not a complete cylindrical shape, but this embodiment is also applicable to cylindrical valve body seals.

[0033] Further, see Fig.15 The above-mentioned support portion can be a whole continuous support body, or it can be protrusions arranged at intervals, see Fig.14 In the present embodiment, the support portion 35 includes a plurality of support bodies 351, and the support bodies 351 protrude toward the side wall portion 12 relative to the peripheral wall portion 33. The plurality of support bodies 351 are arranged at intervals along the axial direction of the valve core 2. The support bodies 351 are designed as spaced protrusions. On the one hand, it can ensure that when high-pressure fluid flows, the high-pressure fluid flows in the peripheral area of ​​the peripheral wall portion 33 and applies pressure to the fourth surface 3122 of the second elastic portion 312. On the other hand, the compression deformation of the support body 351 is increased to ensure that the elastic portion 31 is tightly fitted to the connecting body 1.

[0034] In some embodiments, it is preferred to arrange the sealing groove D of the elastic part 31 in the extension direction of the upper partition 21, the lower partition 22 and the middle partition 24 of the valve core, so that the compression of the elastic part 31 is more sufficient, and the gas in the sealing groove D is more fully discharged, so that the second surface 3112 and the third surface 3121 of the elastic part 31 are more closely fitted with the side wall portion 12 of the connector 1, thereby improving the sealing performance of the valve.

[0035] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention, such as the directional definitions of "front", "back", "left", "right", "up" and "down". Although the present invention has been described in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified, combined or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device, characterized in that: The valve device comprises a connecting body (1), a valve core (2) and a sealing member (3); the connecting body (1) has a receiving cavity (A) and a communication port (B); the sealing member (3) has a channel (C) corresponding to the communication port (B); and the valve core (2) is at least partially located in the receiving cavity (A); The sealing member (3) comprises an elastic portion (31), wherein the elastic portion (31) is arranged circumferentially along the channel (C), and the elastic portion (31) is compressed by the connecting body (1) and the valve core (2). The sealing member (3) has a sealing groove (D), wherein the sealing groove (D) is arranged circumferentially along the channel (C), and the connecting body (1) and the elastic portion (31) are fitted to close the sealing groove (D).

2. The valve device according to claim 1, characterized in that The elastic portion (31) includes a first elastic portion (311) and a second elastic portion (312), the first elastic portion (311) and the second elastic portion (312) are both arranged along the circumference of the channel (C), the second elastic portion (312) is away from the center of the channel (C) relative to the first elastic portion (311), and the wall forming the sealing groove (D) includes the first elastic portion (311) and the second elastic portion (312).

3. The valve device according to claim 2, characterized in that The sealing member (3) comprises a base (32), the elastic portion (31) and the base (32) being an integral structure, the elastic portion (31) protruding toward the connecting body (1) on one side wall relative to the base (32), and the other side wall of the base (32) being in sliding cooperation with the valve core (2).

4. The valve device according to claim 3, characterized in that The first elastic portion (311) comprises a first abutting portion (311a) and a first connecting portion (311b), the first abutting portion (311a) is in contact with the connecting body (1), the first connecting portion (311b) is connected to the base body (32), the first connecting portion (311b) is connected to the first abutting portion (311a), the first abutting portion (311a) is farther away from the base body (32) relative to the first connecting portion (311b), and the first abutting portion (311a) is closer to the center of the channel (C) relative to the first connecting portion (311b); And / or, the second elastic portion (312) includes a second abutting portion (312a) and a second connecting portion (312b), the second abutting portion (312a) is in contact with the connecting body (1), the second connecting portion (312b) is connected to the base (32), the second connecting portion (312b) is connected to the second abutting portion (312a), the second abutting portion (312a) is away from the base (32) relative to the second connecting portion (312b), and the second abutting portion (312a) is away from the center of the channel (C) relative to the second connecting portion (312b).

5. The valve device according to claim 4, characterized in that The acute angle between the first elastic portion (311) and the base (32) is a first angle (a), and the first angle (a) is greater than 30° and less than 80°. The acute angle between the second elastic portion (312) and the base (32) is a second angle (b), and the second angle (b) is greater than 30° and less than 80°.

6. The valve device according to any one of claims 1 to 5, characterized in that: The connecting body (1) comprises a side wall portion (12), at least a portion of the sealing member (3) is pressed between the side wall portion (12) and the valve core (2), the sealing member (3) comprises a peripheral wall portion (33), and the elastic portion (31) is located on the periphery of the peripheral wall portion (33).

7. The valve device according to claim 6, characterized in that The channel (C) of the sealing element (3) is arranged in plurality, the elastic portion (31) comprises a first elastic portion (311) and a second elastic portion (312), the first elastic portion (311) and the second elastic portion (312) are both arranged circumferentially along the channel (C), each wall forming the channel (C) comprises the first elastic portion (311), and the enclosed space of the second elastic portion (312) is provided with one or more first elastic portions (311).

8. The valve device according to claim 7, characterized in that The sealing member (3) comprises a plurality of groups of channels (C), each group of channels (C) comprising a first channel (C1) and a second channel (C2); along the axial direction of the valve core (2), the orthographic projections of the plurality of groups of channels (C) are arranged at intervals along the circumferential direction of the valve core (2); the orthographic projections of the first channel (C1) and the second channel (C2) overlap; the wall forming the first channel (C1) and the wall forming the second channel (C2) both comprise a first elastic portion (311); and the two first elastic portions (311) are located in the enclosed space of the same second elastic portion (312).

9. The valve device according to any one of claims 5 to 8, characterized in that: The sealing member (3) has a limiting portion (34), and along the circumferential direction of the valve core (2), the limiting portion (34) is located at both ends of the peripheral wall portion (33); the side wall portion (12) of the connecting body (1) is provided with a limiting rib (13), and the limiting portion (34) abuts against the limiting rib (13); and a supporting portion (35) is provided between the limiting portion (34) and the elastic portion (31) on the outer periphery of the peripheral wall portion (33), and the supporting portion (35) abuts against the side wall portion (12) of the connecting body (1).

10. The valve device according to claim 9, characterized in that The support portion (35) comprises a plurality of support bodies (351), wherein the support bodies (351) protrude toward the side wall portion (12) relative to the peripheral wall portion (33), and the plurality of support bodies (351) are arranged at intervals along the axial direction of the valve core (2).

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