Valve structure

Abstract

The valve structure comprises a valve body, a valve element and a sealing ring, the valve body is provided with a valve cavity, the valve cavity is provided with a valve port, the valve element is movably arranged in the valve cavity and used for adjustably sealing the valve port, a sealing groove is formed in the valve element in the circumferential direction, at least part of the sealing ring is arranged in the sealing groove, and the part, exposed out of the sealing groove, of the sealing ring is in sealing fit with the valve port; a cavity is formed between the sealing groove and the sealing ring, a balance channel is formed in the valve element, one end of the balance channel communicates with the cavity, and the other end of the balance channel communicates with the space, located outside the valve element, in the valve body. The acting force of the fluid borne by the part, exposed out of the sealing groove, of the sealing ring is opposite to the acting force of the fluid in the cavity borne by the sealing ring in direction. Through the design, the sealing ring can be extruded towards the two sides in the circumferential direction in the area, close to the valve port, of the sealing ring under the action of drainage pressure, so that the outer side area of the sealing ring resists extrusion of the pressure difference action, and deformation of the sealing ring is reduced or avoided.

Description

Technical Field

[0001] The invention relates to a valve structure. Background Art

[0002] The valve core of the existing valve structure is provided with a sealing ring around the valve core, and the sealing ring is used to seal the valve core to the valve port of the valve body. However, when the valve core moves with the valve structure, or when the valve core is closed, the high-pressure fluid entering the valve cavity acts on the sealing ring on the valve core, causing the sealing ring to be squeezed, resulting in compression deformation of the sealing ring, causing serious internal leakage problems in the valve structure. Summary of the invention

[0003] A main purpose of the present invention is to overcome at least one of the above-mentioned defects of the prior art and provide a valve structure that is not prone to internal leakage.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] According to one aspect of the present invention, there is provided a valve structure, comprising a valve body, a valve core and a sealing ring, the valve body having a valve cavity, the valve cavity having a valve port, the valve core being movably arranged in the valve cavity and used for adjustably sealing the valve port, the valve core being circumferentially provided with a sealing groove, the sealing ring being at least partially arranged in the sealing groove, the portion of the sealing ring exposed in the sealing groove being in sealing cooperation with the valve port; wherein a cavity is formed between the sealing groove and the sealing ring, a balancing channel is arranged in the valve core, one end of the balancing channel is connected to the cavity, and the other end is connected to a space in the valve body outside the valve core; wherein the force exerted by the fluid on the portion of the sealing ring exposed in the sealing groove is opposite in direction to the force exerted by the fluid on the sealing ring in the cavity.

[0006] According to one embodiment of the present invention, wherein: the sealing groove has an upper groove wall, the cavity includes a first cavity formed between the upper groove wall and the upper surface of the sealing ring, the balancing channel includes a first balancing channel, the first balancing channel is connected to the first cavity and the area of ​​the valve cavity located above the sealing ring; and / or, the sealing groove has a lower groove wall, the cavity includes a second cavity formed between the lower groove wall and the lower surface of the sealing ring, the balancing channel includes a second balancing channel, the second balancing channel is connected to the second cavity and the area of ​​the valve cavity located below the sealing ring.

[0007] According to one embodiment of the present invention, the sealing groove has the upper groove wall and the lower groove wall, and the balancing channel includes the first balancing channel and the second balancing channel; wherein, in the radial direction of the valve body, the width of the upper groove wall is greater than the width of the lower groove wall, and the width of the opening of the first balancing channel on the upper groove wall is greater than or equal to the width of the opening of the second balancing channel on the lower groove wall.

[0008] According to one embodiment of the present invention, the sealing groove has the upper groove wall, and the balancing channel includes the first balancing channel; wherein the valve core is provided with at least two of the first balancing channels, and the at least two first balancing channels are evenly arranged along the circumference of the valve core.

[0009] According to one embodiment of the present invention, the sealing groove has the lower groove wall, and the balancing channel includes the second balancing channel; wherein the lower groove wall is provided with at least two second balancing channels, and the at least two second balancing channels are evenly arranged along the circumference of the valve core.

[0010] According to one embodiment of the present invention, the sealing groove has the upper groove wall, and the balancing channel includes the first balancing channel, wherein: the first balancing channel is a through hole; or, the first balancing channel is a through groove, with the plane where the upper groove wall is located as the reference plane, and on the reference plane, the orthographic projection of the through groove is arc-shaped.

[0011] According to one embodiment of the present invention, the sealing groove has the lower groove wall, and the balancing channel includes the second balancing channel, wherein: the second balancing channel is a through hole; or, the second balancing channel is a through groove, with the plane where the lower groove wall is located as a reference plane, and on the reference plane, the orthographic projection of the through groove is arc-shaped.

[0012] According to one embodiment of the present invention, the sealing groove has the upper groove wall, and the cavity includes the first cavity; wherein a first groove is formed on the upper surface of the sealing ring, and the first groove and the upper groove wall together form the first cavity.

[0013] According to one embodiment of the present invention, a first groove is provided on the upper surface of the sealing ring, the first groove is in a closed circular ring shape, and each of the first balancing channels is arranged to overlap with the first groove.

[0014] According to one embodiment of the present invention, the sealing groove has the lower groove wall, and the cavity includes the second cavity; wherein a second groove is formed on the upper surface of the sealing ring, and the second groove and the lower groove wall together form the second cavity.

[0015] According to one embodiment of the present invention, a second groove is provided on the lower surface of the sealing ring, the second groove is in a closed circular ring shape, and each of the second balancing channels is arranged to overlap with the second groove.

[0016] According to one embodiment of the present invention, the valve core is an integrated structure.

[0017] According to one embodiment of the present invention, the valve core includes a piston and a compression sleeve, the compression sleeve is connected to the lower end of the piston, the piston is circumferentially provided with a first boss, the compression sleeve is circumferentially provided with a second boss, the first boss and the second boss are axially spaced apart; wherein the space between the first boss and the second boss forms the sealing groove, the lower surface of the first boss is the upper groove wall of the sealing groove, and the upper surface of the second boss is the lower groove wall of the sealing groove.

[0018] It can be seen from the above technical solution that the advantages and positive effects of the valve structure proposed by the present invention are:

[0019] The valve structure proposed in the present invention includes a valve body, a valve core and a sealing ring, the valve core is provided with a sealing groove in the circumferential direction, the sealing ring is at least partially arranged in the sealing groove, a cavity is formed between the sealing groove and the sealing ring, and a balancing channel is provided in the valve core, one end of the balancing channel is connected to the cavity, and the other end is connected to the valve cavity. Through the above design, the present invention can use the balancing channel to drain the fluid in the valve cavity to the upper part and / or the lower part of the sealing ring, thereby making the sealing ring subject to the effect of the drainage pressure and being squeezed toward both sides along the circumferential direction in the area of ​​the sealing ring close to the valve port, so that the outer area of ​​the sealing ring resists the squeezing due to the pressure difference, so that the force on the sealing ring tends to be balanced, which is conducive to reducing or avoiding the deformation of the sealing ring and improving the sealing performance of the valve structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are merely exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always refer to the same or similar parts. Among them:

[0021] Figure 1 is a schematic diagram of a three-dimensional structure of a valve structure according to an exemplary embodiment;

[0022] Figure 2 is along Figure 1 An axial cross-sectional view of the valve structure shown;

[0023] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in FIG.

[0024] Figure 4 yes Figure 3 Schematic diagram of force identification;

[0025] Figure 5 yes Figure 2 A schematic diagram of the three-dimensional structure of the valve core is shown;

[0026] Figure 6 yes Figure 5 A three-dimensional exploded schematic diagram of the valve core is shown;

[0027] Figure 7 yes Figure 5 An axial cross-sectional view of the valve core is shown;

[0028] Figure 8 and Fig. 9 They are Figure 2 The three-dimensional structure schematic diagram of the sealing ring at two different viewing angles is shown;

[0029] Fig.10 is a perspective exploded schematic diagram of a valve core of a valve structure according to another exemplary embodiment;

[0030] Fig.11 is an axial cross-sectional view of a valve core of a valve structure according to yet another exemplary embodiment;

[0031] Fig.12 and Fig.13 Partially enlarged cross-sectional views of valve structures according to other two exemplary embodiments are shown respectively.

[0032] The following are the descriptions of the reference numerals:

[0033] 100. Valve body;

[0034] 110. Valve chamber;

[0035] 200. Valve core;

[0036] 201. Piston;

[0037] 2011. First Boss;

[0038] 202. Press sleeve;

[0039] 2021. Second boss;

[0040] 203. Boss;

[0041] 210. Sealing groove;

[0042] 211. Upper tank wall;

[0043] 212. Lower tank wall;

[0044] 221. The first balance channel;

[0045] 222. Second balance channel;

[0046] 300. Sealing ring;

[0047] 310. First groove;

[0048] 320. Second groove;

[0049] f1. Extrusion force;

[0050] f2. Extrusion pressure;

[0051] f3. Extrusion pressure;

[0052] C1. The first cavity;

[0053] C2. Second cavity;

[0054] S1. Region;

[0055] S2. Region;

[0056] W1.Width;

[0057] W2.Width;

[0058] W3.Width;

[0059] W4.Width. DETAILED DESCRIPTION

[0060] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and drawings therein are essentially for illustrative purposes rather than for limiting the present invention.

[0061] In the following description of different exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part of the present invention and in which different exemplary structures, systems and steps that can implement multiple aspects of the present invention are shown by way of example. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps can be used, and structural and functional modifications can be made without departing from the scope of the present invention. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present invention, these terms are used herein only for convenience, such as according to the direction of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the present invention.

[0062] See also Figure 1, which representatively shows a schematic diagram of the three-dimensional structure of the valve structure proposed in the present invention. In this exemplary embodiment, the valve structure proposed in the present invention is described by taking the valve structure applied to a vehicle thermal management system as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the present invention to valve structures of other types or application scenarios, various modifications, additions, substitutions, deletions or other changes are made to the specific embodiments described below, and these changes are still within the scope of the principle of the valve structure proposed in the present invention.

[0063] like Figure 1 As shown, in one embodiment of the present invention, the valve structure provided by the present invention includes a valve body 100, a valve core 200 and a sealing ring 300, the valve body 100 has a valve cavity 110, and the valve cavity 110 has a valve port, for example, Figure 1 and Figure 2 Taking the structure shown as an example, when the valve port is located at the lower end of the valve structure, the valve port can be understood as the lower end of the valve cavity 110, that is, the valve cavity 110 is located above the valve port. The valve core 200 is movably arranged in the valve cavity 110, and the valve core 200 can move up and down axially in the valve cavity 110 to adjustably seal the valve port. The valve core 200 is provided with a sealing groove 210 in the circumferential direction, and the sealing ring 300 is at least partially arranged in the sealing groove 210. The portion of the sealing ring 300 exposed in the sealing groove 210 is sealed with the valve port. For example, when the valve structure is in a state of valve port closing, the portion of the sealing ring 300 exposed in the sealing groove 210 abuts against the cavity wall of the valve cavity 110. For coordination, refer to Figures 2 to 9 , Figure 2 A representative axial cross-sectional view of a valve structure is shown in FIG. Figure 3 A representative example is shown in Figure 2 An enlarged schematic diagram of part A in FIG. Figure 4 yes Figure 3 Schematic diagram of force identification; Figure 5 A three-dimensional structural schematic diagram of the valve core 200 is representatively shown in FIG. Figure 6 A three-dimensional exploded schematic diagram of the valve core 200 is representatively shown in FIG. Figure 7 A representative axial cross-sectional view of the valve core 200 is shown; Figure 8 and Fig. 9 The three-dimensional structural diagrams of the sealing ring 300 at two different viewing angles are respectively and representatively shown. The structures, connection modes and functional relationships of the main components of the valve structure proposed by the present invention will be described in detail below in conjunction with the above drawings.

[0064] like Figures 1 to 3As shown, in one embodiment of the present invention, a cavity is formed between the sealing groove 210 and the sealing ring 300, and a balancing channel is provided in the valve core 200, one end of which is connected to the cavity, and the other end of which is connected to the valve cavity 110 of the valve body 100. Accordingly, the force exerted on the sealing ring 300 by the fluid directed into the cavity includes an outward extrusion force, and the force exerted on the outer periphery of the sealing ring 300 by the fluid in the valve cavity 110 includes an inward extrusion force, and the outward extrusion force and the inward extrusion force are opposite in direction and at least partially offset each other. Through the above design, the present invention can utilize the balancing channel to drain the fluid in the valve chamber 110 to the cavity formed between the sealing groove 210 and the sealing ring 300, thereby causing the sealing ring 300 to be squeezed circumferentially toward both sides in the area of ​​the sealing ring 300 close to the valve port under the action of the drainage pressure, so that the outer area of ​​the sealing ring 300 resists the squeezing caused by the pressure difference, and the force on the sealing ring 300 tends to be balanced, which is beneficial to reduce or avoid deformation of the sealing ring 300 and improve the sealing performance of the valve structure.

[0065] like Figures 1 to 3 As shown, in one embodiment of the present invention, the sealing groove 210 has an upper groove wall 211 and a lower groove wall 212 arranged opposite to each other. The cavity includes a first cavity C1 and a second cavity C2, the first cavity C1 is formed between the upper groove wall 211 and the upper surface of the sealing ring 300, and the second cavity C1 is formed between the lower groove wall 212 and the lower surface of the sealing ring 300. The balancing channel includes a first balancing channel 221 and a second balancing channel 222. The first balancing channel 221 communicates with the first cavity C1 and the area of ​​the valve cavity 110 located above the sealing ring 300, that is, one end of the first balancing channel 221 opens to the upper groove wall 211, and the other end opens to the area of ​​the valve core 200 surface located above the sealing groove 210 and communicates with the space outside the valve core 200 in the valve body 100 (for example, the area of ​​the valve cavity 110 located above the valve core 200). The second balancing channel 222 is connected to the second cavity C2 and the area of ​​the valve cavity 110 below the sealing ring 300, that is, one end of the second balancing channel 222 opens to the lower groove wall 212, and the other end opens to the area of ​​the valve core 200 surface below the sealing groove 210 and is connected to the space outside the valve core 200 in the valve body 100 (for example, the area of ​​the valve cavity 110 below the valve core 200, such as the valve port). Accordingly, the force of the fluid on the portion of the sealing ring 300 exposed to the sealing groove 210 (see Figure 4 The extrusion force f1 shown in FIG. 1 is the force exerted by the fluid in the cavity on the sealing ring 300 (see FIG. 1 ). Figure 4The extrusion force f2 and the extrusion force f3 shown in the figure are in opposite directions. Through the above design, the present invention can use the first balance channel 221 and the second balance channel 221 to achieve drainage of the upper and lower parts of the sealing ring 300, thereby further improving the resistance effect of the outer area of ​​the sealing ring 300 to the pressure difference, making the force on the sealing ring 300 more balanced, further reducing or avoiding the deformation of the sealing ring 300, and further improving the sealing performance of the valve structure.

[0066] Specifically, if Figure 4 As shown, Figure 4 The figure specifically shows the stress condition of the sealing ring 300 when the area above the sealing ring 300 where the valve chamber 110 is located is a high-pressure area, wherein the outer side of the sealing ring 300 is subjected to the inward extrusion force f1 due to the above-mentioned pressure differential force, and the middle area of ​​the sealing ring 300 (for example, the upper surface) is subjected to the outward extrusion force f2 due to the presence of the first balancing channel 221, and the middle area of ​​the sealing ring 300 (for example, the lower surface) is subjected to the outward extrusion force f3 due to the presence of the second balancing channel 222. At this time, the extrusion force f2 and the extrusion force f1 on the inner and outer sides of the area S1 at the top of the sealing ring 300 at least partially offset each other, and the extrusion force f3 and the extrusion force f1 on the inner and outer sides of the area S2 at the bottom of the sealing ring 300 at least partially offset each other, so that the forces on the sealing ring 300 in the areas S1 and S2 tend to be balanced, thereby avoiding deformation of the sealing ring 300 or reducing the deformation of the sealing ring 300. In some embodiments, the area of ​​the valve chamber 110 below the sealing ring 300 may also be a high-pressure area. At this time, the outer periphery of the sealing ring 300 will also be subjected to an inward extrusion pressure, and a portion of the fluid is diverted through the balance channel to the cavity between the sealing ring 300 and the sealing groove 210. The outward extrusion pressure generated can at least partially offset the inward extrusion force, thereby avoiding deformation of the sealing ring 300 or reducing the deformation of the sealing ring 300.

[0067] like Figure 7As shown, in one embodiment of the present invention, in the radial direction of the valve body 100 (e.g., the horizontal direction in the figure), the width W1 of the opening of the first balancing channel 221 on the upper groove wall 211 can account for 1 / 10 to 1 / 2 of the width W2 of the upper groove wall 211, such as 1 / 10, 1 / 8, 1 / 5, 1 / 3, 1 / 2, etc. Through the above design, the present invention can avoid the opening width of the first balancing channel 221 on the upper groove wall 211 from accounting for too large a proportion, leaving enough area for the contact between the upper groove wall 211 and the upper surface of the sealing ring 300, thereby ensuring the sealing effect of the sealing ring 300. At the same time, the present invention can avoid the opening width of the first balancing channel 221 on the upper groove wall 211 from accounting for too small a proportion, so that the first balancing channel 221 provides sufficient drainage and then provides sufficient extrusion force in the middle area of ​​the upper surface of the sealing ring 300 to offset the extrusion force on the outside, further alleviating the deformation problem of the sealing ring 300. In some embodiments, the width W1 of the opening of the first balancing channel 221 on the upper groove wall 211 may account for less than 1 / 10 of the width W2 of the upper groove wall 211, or may be greater than 1 / 2, such as 10 / 101, 51 / 100, etc., and is not limited to this embodiment.

[0068] like Figure 7 As shown, in one embodiment of the present invention, in the radial direction of the valve body 100 (e.g., the horizontal direction in the figure), the width W3 of the opening of the second balancing channel 222 on the lower groove wall 212 can account for 1 / 10 to 1 / 2 of the width W4 of the upper groove wall 211, such as 1 / 10, 1 / 8, 1 / 5, 1 / 3, 1 / 2, etc. Through the above design, the present invention can avoid the opening width of the second balancing channel 222 on the lower groove wall 212 accounting for too large a proportion, leaving enough area for the contact between the lower groove wall 212 and the lower surface of the sealing ring 300, and ensuring the sealing effect of the sealing ring 300. At the same time, the present invention can avoid the opening width of the second balancing channel 222 on the lower groove wall 212 accounting for too small a proportion, so that the second balancing channel 222 provides sufficient drainage and then provides sufficient extrusion force in the middle area of ​​the lower surface of the sealing ring 300 to offset the extrusion force on the outside, further alleviating the deformation problem of the sealing ring 300. In some embodiments, the width W3 of the opening of the second balancing channel 222 on the lower groove wall 212 may account for less than 1 / 10 of the width W4 of the lower groove wall 212, or may be greater than 1 / 2, such as 10 / 101, 51 / 100, etc., and is not limited to this embodiment.

[0069] like Figure 7As shown, in one embodiment of the present invention, in the radial direction of the valve body 100, the width W2 of the upper groove wall 211 is greater than the width W4 of the lower groove wall 212. For example, the sealing groove 210 may be in a trapezoidal cross-sectional shape in the axial side cross-sectional view. On this basis, the width W1 of the opening of the first balancing channel 221 on the upper groove wall 211 may be greater than or equal to the width W3 of the opening of the second balancing channel 222 on the lower groove wall 212. Through the above design, the present invention can make the extrusion force generated by the drainage of the balancing channel on the upper and lower sides of the sealing ring 300 more balanced, and further avoid the deformation of the sealing ring 300.

[0070] The valve core 200 may be provided with at least one first balancing channel 221. In some embodiments, the valve core 200 may also be provided with at least two first balancing channels 221. Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the valve core 200 may be provided with four first balancing channels 221, and these first balancing channels 221 are evenly spaced along the circumference of the valve core 200. Through the above design, the present invention can make the extrusion force generated by the drainage of the first balancing channels 221 on the upper part of the sealing ring 300 more balanced in the circumferential direction, further avoiding the deformation of the sealing ring 300. In some embodiments, the valve core 200 may also be provided with two, three, five or more first balancing channels 221, which is not limited to this embodiment.

[0071] The valve core 200 may be provided with at least one second balancing channel 222. In some embodiments, the valve core 200 may also be provided with at least two second balancing channels 222. Figure 6 As shown, in one embodiment of the present invention, the valve core 200 may be provided with eight second balancing channels 222, and these second balancing channels 222 are evenly spaced along the circumference of the valve core 200. Through the above design, the present invention can make the extrusion force generated by the drainage of the second balancing channels 222 on the lower part of the sealing ring 300 more balanced in the circumferential direction, further avoiding the deformation of the sealing ring 300. In some embodiments, the valve core 200 may also be provided with two, three, five or more second balancing channels 222, which is not limited to this embodiment.

[0072] like Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the first balancing channel 221 can be a through hole, such as but not limited to a circular hole, an elliptical hole, a rectangular hole, etc. Through the above design, the present invention can make the first balancing channel 221 easier to process and has less impact on the structure of the valve core 200.

[0073] like Figure 6As shown, in one embodiment of the present invention, the second balancing channel 222 may be a through hole, such as but not limited to a circular hole, an elliptical hole, a rectangular hole, etc. Through the above design, the present invention can make the second balancing channel 222 easier to process and has less impact on the structure of the valve core 200.

[0074] See also Fig.10 , Fig.10 Detailed Description of the Invention A three-dimensional structural diagram of a valve core 200 in another exemplary embodiment of a valve structure that can embody the principles of the present invention is representatively shown.

[0075] like Fig.10 As shown, in one embodiment of the present invention, the first balancing channel 221 can be a through groove, with the plane where the upper groove wall 211 is located as a reference plane, and on this reference plane, the through groove can be arc-shaped. For example, taking the sealing groove 210 as a circular ring as an example, the arc corresponding to each through groove can match the curvature of one section of the circular ring corresponding to the sealing ring. Through the above design, the present invention can expand the drainage area of ​​the first balancing channel 221, optimize the squeezing effect on the middle area of ​​the upper surface of the sealing ring 300, and further avoid deformation of the sealing ring 300.

[0076] like Fig.10 As shown, in one embodiment of the present invention, the second balancing channel 222 can be a through groove, with the plane where the lower groove wall 212 is located as a reference plane, and on this reference plane, the through groove can be arc-shaped. For example, taking the sealing groove 210 as a circular ring as an example, the arc corresponding to each through groove can match the curvature of one section of the circular ring corresponding to the sealing ring. Through the above design, the present invention can expand the drainage area of ​​the second balancing channel 222, optimize the squeezing effect on the middle area of ​​the lower surface of the sealing ring 300, and further avoid deformation of the sealing ring 300.

[0077] like Figure 7 As shown, in one embodiment of the present invention, the valve core 200 may include a piston 201 and a compression sleeve 202, wherein the compression sleeve 202 is connected to the lower end of the piston 201, for example, partially sleeved in the bottom opening of the piston 201. On this basis, the piston 201 is provided with a first boss 2011 in the circumferential direction, and the compression sleeve 202 is provided with a second boss 2021 in the circumferential direction, and the first boss 2011 and the second boss 2021 are arranged at intervals along the axial direction, for example, the upper and lower intervals shown in the drawings. On this basis, the space between the first boss 2011 and the second boss 2021 forms the sealing groove 210 of the valve core 200, and the lower surface of the first boss 2011 is the upper groove wall 211 of the sealing groove 210, and the upper surface of the second boss 2021 is the lower groove wall 212 of the sealing groove 210.

[0078] See also Fig.11 , Fig.11Detailed Description of the Invention A representative axial cross-sectional view of a valve core 200 in another exemplary embodiment of a valve structure that can embody the principles of the present invention is shown.

[0079] like Fig.11 As shown, in one embodiment of the present invention, the valve core 200 may be an integral structure. For example, the valve core 200 with an integral structure may be provided with two bosses 203 spaced apart in the axial direction on the circumference, and the space between the two bosses 203 forms the sealing groove 210 of the valve core 200.

[0080] like Figure 3 and Figure 8 As shown, in one embodiment of the present invention, the upper surface of the sealing ring 300 may be provided with a first groove 310, whereby the first groove 310 and the upper groove wall 211 of the sealing groove 210 jointly form a first cavity C1, and the opening of the first balancing channel 221 in the upper groove wall 211 at least partially overlaps with the first groove 310, that is, the first balancing channel 221 is connected to the first cavity C1. Through the above design, the present invention can utilize the first groove 310 to make the upper surface of the sealing ring 300 more fully squeezed under the drainage effect.

[0081] like Figure 8 As shown, based on the design that the upper surface of the sealing ring 300 is provided with a first groove 310, in one embodiment of the present invention, the upper surface of the sealing ring 300 may only have one first groove 310, and the first groove 310 may be in a closed annular shape, that is, the first cavity C1 may be in a closed annular shape, and each first balancing channel 221 is arranged overlapping with the first groove 310. In some embodiments, the upper surface of the sealing ring 300 may also have multiple first grooves 310, and the multiple first grooves 310 may be arranged corresponding to the positions of the multiple first balancing channels 221, respectively.

[0082] Based on the design that the first groove 310 is opened on the upper surface of the sealing ring 300, in one embodiment of the present invention, in the radial direction of the valve body 100 (for example, the horizontal direction in the figure), the width of the first groove 310 may account for 1 / 10 to 1 / 2 of the width of the upper surface of the sealing ring 300, such as 1 / 10, 1 / 8, 1 / 5, 1 / 3, 1 / 2, etc. Through the above design, the present invention can avoid that the opening width of the first groove 310 on the upper surface of the sealing ring 300 accounts for too large a proportion, and reserve sufficient area for the contact between the upper groove wall 211 and the upper surface of the sealing ring 300, thereby ensuring the sealing effect of the sealing ring 300. In some embodiments, the width of the first groove 310 may account for less than 1 / 10 of the width of the upper surface of the sealing ring 300, or may be greater than 1 / 2, such as 10 / 101, 51 / 100, etc., and is not limited to this embodiment.

[0083] like Figure 3 As shown, based on the design that the upper surface of the sealing ring 300 is provided with a first groove 310, in one embodiment of the present invention, the plane where the upper surface of the sealing ring 300 is located is taken as the reference plane, on which the orthographic projection of the opening of the first balancing channel 221 in the upper groove wall 211 can be completely located in the first groove 310. Furthermore, the width of the first groove 310 in the radial direction can be slightly larger than the width of the opening of the first balancing channel 221 in the upper groove wall 211. Through the above design, the present invention can make the drainage of the first balancing channel 211 generate a more sufficient extrusion force on the sealing ring 300 at the first groove 310.

[0084] like Figure 3 and Fig. 9 As shown, in one embodiment of the present invention, the lower surface of the sealing ring 300 may be provided with a second groove 320, whereby the second groove 320 and the lower groove wall 212 of the sealing groove 210 jointly form a second cavity C2, and the opening of the second balancing channel 222 in the lower groove wall 212 at least partially overlaps with the second groove 320, that is, the second balancing channel 222 is connected to the second cavity C2. Through the above design, the present invention can utilize the second groove 320 to make the extrusion force on the lower surface of the sealing ring 300 under the drainage effect more sufficient.

[0085] like Fig. 9 As shown, based on the design that the lower surface of the sealing ring 300 is provided with a second groove 320, in one embodiment of the present invention, the lower surface of the sealing ring 300 may only have one second groove 320, and the second groove 320 may be in a closed annular shape, that is, the second cavity C2 may be in a closed annular shape, and each second balancing channel 222 is arranged overlapping with the second groove 320. In some embodiments, the lower surface of the sealing ring 300 may also have a plurality of second grooves 320, and the plurality of second grooves 320 may be arranged corresponding to the positions of the plurality of second balancing channels 222, respectively.

[0086] Based on the design that the second groove 320 is provided on the lower surface of the sealing ring 300, in one embodiment of the present invention, in the radial direction of the valve body 100 (e.g., the horizontal direction in the figure), the width of the second groove 320 may account for 1 / 10 to 1 / 2 of the width of the lower surface of the sealing ring 300, such as 1 / 10, 1 / 8, 1 / 5, 1 / 3, 1 / 2, etc. Through the above design, the present invention can avoid the opening width of the second groove 320 on the lower surface of the sealing ring 300 from accounting for too large a proportion, and reserve sufficient area for the contact between the lower groove wall 212 and the lower surface of the sealing ring 300, thereby ensuring the sealing effect of the sealing ring 300. In some embodiments, the width of the second groove 320 may account for less than 1 / 10 of the width of the lower surface of the sealing ring 300, or may be greater than 1 / 2, such as 10 / 101, 51 / 100, etc., and is not limited to this embodiment.

[0087] like Figure 3 As shown, based on the design that the second groove 320 is opened on the lower surface of the sealing ring 300, in one embodiment of the present invention, the plane where the lower surface of the sealing ring 300 is located is taken as the reference plane, on which the orthographic projection of the opening of the second balancing channel 222 in the lower groove wall 212 can be completely located in the second groove 320. Further, the width of the second groove 320 in the radial direction can be slightly larger than the width of the opening of the second balancing channel 222 in the lower groove wall 212. Through the above design, the present invention can make the drainage of the second balancing channel 212 generate a more sufficient extrusion force on the sealing ring 300 at the second groove 320.

[0088] See also Fig.12 , Fig.12 A partial enlarged cross-sectional view of another exemplary embodiment of a valve structure that can embody the principles of the present invention is representatively shown.

[0089] like Fig.12 As shown, in one embodiment of the present invention, the valve core 200 may only be provided with a first balancing channel 221 , that is, no balancing channel is provided at the second groove wall 212 of the sealing groove 210 .

[0090] See also Fig.13 , Fig.13 A partial enlarged cross-sectional view of another exemplary embodiment of a valve structure that can embody the principles of the present invention is representatively shown.

[0091] like Fig.13 As shown, in one embodiment of the present invention, the valve core 200 may only be provided with the second balancing channel 222 , that is, no balancing channel is provided at the first groove wall 211 of the sealing groove 210 .

[0092] As described above, in various possible implementations consistent with the design concept of the present invention, the valve core 200 is provided with a balancing channel in at least one of the first groove wall 211 and the second groove wall 212 of the sealing groove 210 .

[0093] It should be noted that the valve structures shown in the drawings and described in this specification are only a few examples of the many valve structures that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details or any components of the valve structures shown in the drawings or described in this specification.

[0094] In summary, the valve structure proposed in the present invention includes a valve body 100, a valve core 200 and a sealing ring 300. The valve core 200 is provided with a sealing groove 210 in the circumferential direction. The sealing ring 300 is at least partially disposed in the sealing groove 210. A cavity is formed between the sealing groove 210 and the sealing ring 300. A balancing channel is provided in the valve core 200. One end of the balancing channel is connected to the cavity, and the other end is connected to the valve cavity 110. Through the above design, the present invention can use the balancing channel to drain the fluid in the valve cavity 110 to the upper part and / or the lower part of the sealing ring 300, thereby causing the sealing ring 300 to be squeezed toward both sides along the circumferential direction in the area of ​​the sealing ring 300 close to the valve port under the effect of the drainage pressure, so that the outer area of ​​the sealing ring 300 resists the squeezing due to the pressure difference, so that the force on the sealing ring 300 tends to be balanced, which is conducive to reducing or avoiding the deformation of the sealing ring 300 and improving the sealing performance of the valve structure.

[0095] The exemplary embodiments of the valve structure proposed by the present invention are described and / or illustrated in detail above. However, the embodiments of the present invention are not limited to the specific embodiments described here. On the contrary, the components and / or steps of each embodiment can be used independently and separately from other components and / or steps described here. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated here, the terms "one", "an" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to indicate the meaning of open inclusion and mean that in addition to the listed elements / components / etc., there may be other elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical restrictions on their objects.

[0096] While the valve structure of the present invention has been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.

Claims

1. A valve structure, comprising a valve body, a valve core and a sealing ring, wherein the valve body has a valve cavity, the valve cavity has a valve port, the valve core is movably arranged in the valve cavity and is used to adjustably seal the valve port, the valve core is provided with a sealing groove in the circumferential direction, the sealing ring is at least partially arranged in the sealing groove, and the portion of the sealing ring exposed in the sealing groove is sealed with the valve port; characterized in that: A cavity is formed between the sealing groove and the sealing ring, and a balancing channel is opened in the valve core, one end of the balancing channel is connected to the cavity, and the other end is connected to the space outside the valve core in the valve body; wherein the force exerted by the fluid on the part of the sealing ring exposed in the sealing groove is opposite to the direction of the force exerted by the fluid on the sealing ring in the cavity.

2. The valve structure according to claim 1, characterized in that: The sealing groove has an upper groove wall, the cavity includes a first cavity formed between the upper groove wall and the upper surface of the sealing ring, the balancing channel includes a first balancing channel, and the first balancing channel is connected to the first cavity and the area of ​​the valve cavity located above the sealing ring; and / or The sealing groove has a lower groove wall, the cavity includes a second cavity formed between the lower groove wall and the lower surface of the sealing ring, and the balancing channel includes a second balancing channel, and the second balancing channel is connected to the second cavity and the area of ​​the valve cavity located below the sealing ring.

3. The valve structure according to claim 2, characterized in that: The sealing groove has the upper groove wall and the lower groove wall, and the balancing channel includes the first balancing channel and the second balancing channel; wherein, in the radial direction of the valve body, the width of the upper groove wall is greater than the width of the lower groove wall, and the width of the opening of the first balancing channel on the upper groove wall is greater than or equal to the width of the opening of the second balancing channel on the lower groove wall.

4. The valve structure according to claim 2, characterized in that: The sealing groove has the upper groove wall, and the balancing channel includes the first balancing channel; wherein the valve core is provided with at least two of the first balancing channels, and the at least two first balancing channels are evenly spaced along the circumference of the valve core.

5. The valve structure according to claim 2, characterized in that: The sealing groove has the lower groove wall, and the balancing channel includes the second balancing channel; wherein the lower groove wall is provided with at least two second balancing channels, and the at least two second balancing channels are evenly spaced along the circumference of the valve core.

6. The valve structure according to claim 2, characterized in that: The sealing groove has the upper groove wall, and the balancing channel includes the first balancing channel, wherein: The first balancing channel is a through hole; or The first balancing channel is a through groove, and the plane where the upper groove wall is located is taken as a reference plane. On the reference plane, the orthographic projection of the through groove is an arc.

7. The valve structure according to claim 2, characterized in that: The sealing groove has the lower groove wall, and the balancing channel includes the second balancing channel, wherein: The second balancing channel is a through hole; or The second balancing channel is a through groove, and the plane where the lower groove wall is located is taken as a reference plane. On the reference plane, the orthographic projection of the through groove is an arc.

8. The valve structure according to claim 2, characterized in that: The sealing groove has the upper groove wall, and the cavity includes the first cavity; wherein a first groove is formed on the upper surface of the sealing ring, and the first groove and the upper groove wall together form the first cavity.

9. The valve structure according to claim 8, characterized in that: A first groove is provided on the upper surface of the sealing ring. The first groove is in a closed circular ring shape. Each of the first balancing channels is arranged to overlap with the first groove.

10. The valve structure according to claim 2, characterized in that: The sealing groove has the lower groove wall, and the cavity includes the second cavity; wherein a second groove is formed on the upper surface of the sealing ring, and the second groove and the lower groove wall together form the second cavity.

11. The valve structure according to claim 10, characterized in that: A second groove is formed on the lower surface of the sealing ring. The second groove is in a closed circular ring shape. Each of the second balancing channels is arranged to overlap with the second groove.

12. The valve structure according to claim 1, characterized in that: The valve core is an integrated structure.

13. The valve structure according to claim 1, characterized in that: The valve core includes a piston and a compression sleeve, the compression sleeve is connected to the lower end of the piston, the piston is circumferentially provided with a first boss, the compression sleeve is circumferentially provided with a second boss, the first boss and the second boss are axially spaced apart; wherein the space between the first boss and the second boss forms the sealing groove, the lower surface of the first boss is the upper groove wall of the sealing groove, and the upper surface of the second boss is the lower groove wall of the sealing groove.

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