Valve structure

Abstract

The utility model provides a valve structure which comprises a valve body and a valve element. The valve body is provided with a through hole, and the through hole is located in the periphery of the valve body and communicated with a valve cavity of the valve body. The valve element can be movably arranged in the valve cavity in the axial direction. The inner circumferential face of the valve cavity or the outer circumferential face of the valve element is provided with two first sealing grooves in the circumferential direction, the two first sealing grooves are formed in the axial direction in a spaced mode and located in one side, in the axial direction, of the through hole, sealing rings are contained in the two first sealing grooves, and the sealing rings are suitable for achieving sealing between the outer circumferential face of the valve element and the inner circumferential face of the valve cavity. The compression rates of the two sealing rings are different, and / or the filling rates of the two sealing rings in the corresponding first sealing grooves are different. By means of the structural design, the sealing rings contained in the two first sealing grooves are designed to be different in compression rate and / or filling rate, so that the influence of pressure difference generated by media on the deformation performance of the sealing rings can be reduced, and the friction force between the valve element and the valve body in the moving process of the valve element is reduced.

Description

Technical Field

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

[0002] A sealing ring is arranged between the valve core and the valve body of the existing valve structure, and the sealing ring is used to realize the sealing function between the valve body and the valve body in this area. However, it is difficult to meet the high requirements for the sealing function with only one sealing ring, especially the sealing performance of the valve structure is poor when it is used in a high-pressure environment.

[0003] To solve the above technical problems, an existing improvement solution is to set two sealing rings arranged axially in the above region of the valve core and the valve body to meet higher sealing requirements. However, the two sealing rings increase the friction between the valve core and the valve body during movement. Utility Model Content

[0004] A main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art and provide a valve structure with better sealing performance.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, a valve structure is provided, including a valve body and a valve core; the valve body is provided with a through hole, the through hole is located at the outer periphery of the valve body, and the through hole is connected to the valve cavity of the valve body; the valve core can be movably arranged in the valve cavity along the axial direction; wherein, the inner peripheral surface of the valve cavity or the outer peripheral surface of the valve core has two first sealing grooves in the circumferential direction, the two first sealing grooves are arranged at intervals in the axial direction and are both located on one side of the through hole in the axial direction, the two first sealing grooves both accommodate sealing rings, the sealing rings are suitable for achieving sealing between the outer peripheral surface of the valve core and the inner peripheral surface of the valve cavity, the compression rates of the two sealing rings are different, and / or the filling rates of the two sealing rings in the corresponding first sealing grooves are different.

[0007] According to one embodiment of the utility model, the valve structure has a valve port, and of the two first sealing grooves, one relatively close to the valve port in the axial direction is a first groove, and the other is a second groove, the sealing ring accommodated in the first groove is a first sealing ring, and the sealing ring accommodated in the second groove is a second sealing ring, the valve port is connected to the second groove, and the through hole is connected to the first groove; wherein: in an initial state, when the compression rate of the first sealing ring is greater than the compression rate of the second sealing ring, and the filling rate of the first sealing ring in the first groove is greater than the filling rate of the second sealing ring in the second groove, the medium flow direction of the valve structure is to flow in from the valve port; or, in an initial state, when the compression rate of the first sealing ring is less than the compression rate of the second sealing ring, and the filling rate of the first sealing ring in the first groove is less than the filling rate of the second sealing ring in the second groove, the medium flow direction of the valve structure is to flow out from the valve port.

[0008] According to one of the embodiments of the utility model, the two first sealing grooves are the same in shape and size, and the cross-sectional diameters of the two sealing rings in an uncompressed state are not equal; or, the volumes of the two first sealing grooves are different, and the cross-sectional diameters of the two sealing rings in an uncompressed state are equal.

[0009] According to one of the embodiments of the utility model, a plane parallel to the axial direction is used as a cutting surface, and the cross-section of the first sealing groove cut by the cutting surface is rectangular, and the groove widths of the two first sealing grooves along the axial direction are equal; wherein: the groove depths of the two first sealing grooves are equal, and the cross-sectional diameters of the two sealing rings in the uncompressed state are unequal; or, the cross-sectional diameters of the two sealing rings in the uncompressed state are equal, and the groove depths of the two first sealing grooves are unequal.

[0010] According to one embodiment of the utility model, an oil storage groove is circumferentially provided on the inner circumferential surface of the valve cavity or the outer circumferential surface of the valve core, and the oil storage groove is axially located between the two first sealing grooves. The oil storage groove is suitable for containing lubricating oil and forming an oil seal between the two first sealing grooves.

[0011] According to one of the embodiments of the utility model, wherein: the first sealing groove and the oil storage groove are both arranged on the inner circumferential surface of the valve cavity, a part of the area of ​​the inner circumferential surface located between the two first sealing grooves is recessed relative to other parts to form the oil storage groove, and the oil storage groove and the first sealing groove are arranged axially at intervals; or, the first sealing groove and the oil storage groove are both arranged on the outer circumferential surface of the valve core, a part of the area of ​​the outer circumferential surface located between the two first sealing grooves is recessed relative to other parts to form the oil storage groove, and the oil storage groove and the first sealing groove are arranged axially at intervals.

[0012] According to one of the embodiments of the utility model, wherein: the first sealing groove and the oil storage groove are both arranged on the inner circumferential surface of the valve cavity, the area of ​​the inner circumferential surface between the two first sealing grooves is recessed as a whole relative to other areas to form the oil storage groove, and the oil storage groove is axially connected with the first sealing groove; or, the first sealing groove and the oil storage groove are both arranged on the outer circumferential surface of the valve core, the area of ​​the outer circumferential surface between the two first sealing grooves is recessed as a whole relative to other areas to form the oil storage groove, and the oil storage groove is axially connected with the first sealing groove.

[0013] According to one embodiment of the utility model, the valve structure has a valve port, 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 a second sealing groove, the second sealing groove accommodates a sealing ring, and the sealing ring is suitable for achieving sealing between the valve core and the valve port.

[0014] According to one embodiment of the utility model, a first protrusion is provided on the lower surface of the first boss, a second protrusion is provided on the upper surface of the second boss, a first groove is provided on the upper surface of the sealing ring, a second groove is provided on the lower surface of the sealing ring, the first protrusion is accommodated in the first groove, and the second protrusion is accommodated in the second groove.

[0015] According to one of the embodiments of the utility model, wherein: along the radial direction, the first protrusion and the second protrusion are staggered; and / or, a first gap is formed between an area where the lower surface of the first boss is located outside the first protrusion and an area where the upper surface of the sealing ring is located outside the first groove; and a second gap is formed between an area where the upper surface of the second boss is located outside the second protrusion and an area where the lower surface of the sealing ring is located outside the second groove.

[0016] According to one embodiment of the utility model, the first boss is provided with a first balancing channel, the first balancing channel passes through the first boss, and one end of the first balancing channel opens on the end surface of the first protrusion facing the second boss; the second boss is provided with a second balancing channel, the second balancing channel passes through the second boss, and one end of the second balancing channel opens on the end surface of the second protrusion facing the first boss.

[0017] It can be seen from the above technical solution that the advantages and positive effects of the valve structure proposed by the utility model are:

[0018] The valve structure proposed in the utility model has two first sealing grooves circumferentially provided on the inner circumference of the valve cavity or the outer circumference of the valve core. The two first sealing grooves are arranged at intervals along the axial direction and are both located on one side of the through hole of the valve body in the axial direction. The two first sealing grooves both contain sealing rings, which are suitable for realizing the sealing between the outer circumference of the valve core and the inner circumference of the valve cavity. The compression rates of the two sealing rings are different, and / or the filling rates of the two sealing rings in their respective corresponding first sealing grooves are different. Through the above-mentioned structural design, on the basis of optimizing the sealing performance between the valve body and the valve core by using the two first sealing grooves, the utility model adopts a design with different compression rates and / or filling rates for the sealing rings contained in the two first sealing grooves, thereby reducing the compression rate and / or filling rate corresponding to one of the sealing rings, and reducing the friction between the valve core and the valve body during the movement of the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The various objects, features and advantages of the present invention will become more apparent by considering the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The accompanying drawings are only exemplary illustrations of the present invention and are not necessarily drawn to scale. In the accompanying drawings, the same reference numerals always represent the same or similar parts. Among them:

[0020] Figure 1 is a schematic diagram of a three-dimensional structure of a valve structure according to an exemplary embodiment;

[0021] Figure 2 yes Figure 1 An axial cross-sectional view of the valve structure shown;

[0022] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in FIG.

[0023] Figure 4 yes Figure 2 An enlarged schematic diagram of part B in FIG.

[0024] Figure 5 and Figure 6 They are Figure 2 The valve core is shown in a three-dimensional exploded schematic diagram at two different viewing angles;

[0025] Figures 7 to 10 They are respectively partial enlarged cross-sectional views of valve structures according to other several exemplary embodiments.

[0026] The following are the descriptions of the reference numerals:

[0027] 100. Valve body;

[0028] 110. Valve chamber;

[0029] 120. Valve port;

[0030] 130.Through hole;

[0031] 200. Valve core;

[0032] 201.Balance channel;

[0033] 211. First slot;

[0034] 212. Second slot;

[0035] 221. First sealing ring;

[0036] 222. Second sealing ring;

[0037] 230. Oil storage tank;

[0038] 240. Piston;

[0039] 241. First boss;

[0040] 2411. First bulge;

[0041] 2412. First balance channel;

[0042] 250. Press sleeve;

[0043] 251. Second boss;

[0044] 2511. Second bulge;

[0045] 2512. Second balance channel;

[0046] 260. Second sealing groove;

[0047] 270. Sealing ring;

[0048] 271. First groove;

[0049] 272. Second groove;

[0050] G1. First gap;

[0051] G2. The second gap;

[0052] H. Groove depth;

[0053] W. Groove width;

[0054] X. Axial. DETAILED DESCRIPTION

[0055] 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.

[0056] In the following description of different exemplary embodiments of the utility model, reference is made to the accompanying drawings, which form a part of the utility model and in which different exemplary structures, systems and steps that can implement multiple aspects of the utility model 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 utility model. Moreover, although the terms "above", "between", "within", etc. can be used in this specification to describe different exemplary features and elements of the utility model, 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 utility model.

[0057] See also Figure 1 , which representatively shows a three-dimensional structural schematic diagram of the valve structure proposed by the utility model. In this exemplary embodiment, the valve structure proposed by the utility model is described by taking the valve structure applied to the thermal management system of a vehicle as an example. It is easy for those skilled in the art to understand that in order to apply the relevant design of the utility model 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 by the utility model.

[0058] 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 and a valve core 200. Figures 2 to 5 , 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.

[0059] Figure 4 A representative example is shown in Figure 2 An enlarged schematic diagram of part B in FIG. Figure 5 A three-dimensional exploded schematic diagram of the valve core 200 is representatively shown in FIG. 1 ; the structures, connection methods and functional relationships of the main components of the valve structure proposed in the present invention will be described in detail below in conjunction with the above drawings.

[0060] like Figures 1 to 3 , Figure 5 and Figure 6 As shown, in one embodiment of the present invention, the valve body 100 is provided with a through hole 130, which is located at the outer periphery of the valve body 100, that is, the opening direction of the through hole 130 is perpendicular to the axial direction X (for example, in the radial direction), and the through hole 130 is connected to the valve cavity 110 of the valve body 100. The valve core 200 can be movably arranged in the valve cavity 110 along the axial direction X. On this basis, the outer peripheral surface of the valve core 200 is provided with two first sealing grooves in the circumferential direction, and the two first sealing grooves are arranged at intervals along the axial direction X. The two first sealing grooves are both located on one side of the through hole 130 in the axial direction X, that is, one first sealing groove is farther away from the through hole 130 than the other first sealing groove in the axial direction X. The two first sealing grooves both contain sealing rings, which are suitable for achieving sealing between the outer peripheral surface of the valve core 200 and the inner peripheral surface of the valve cavity 110, and the compression rates of the two sealing rings are different, and / or the filling rates of the two sealing rings in the respective corresponding first sealing grooves are different. In this embodiment, in order to achieve the above-mentioned differential design of compression rate and filling rate, the structures of the two first sealing grooves are designed differently. Compared with the two sealing rings corresponding to a larger compression rate and / or filling rate, by reducing the compression rate and / or filling rate corresponding to one of the sealing rings, the friction between the valve core and the valve body during the movement of the valve core can be reduced while ensuring the sealing effect.

[0061] In one embodiment of the present invention, the two first sealing grooves are of the same shape and size, and the cross-sectional diameters of the two sealing rings in the uncompressed state are not equal. The sealing ring with a larger cross-sectional diameter corresponds to a larger compression rate, and the corresponding first sealing groove has a larger filling rate. Accordingly, the present invention can reduce the friction between the valve core and the valve body during the movement of the valve core by reducing the cross-sectional diameter of one of the sealing rings, compared with the solution of using two sealing rings with larger cross-sectional diameters.

[0062] Alternatively, in another embodiment of the present invention, the volumes of the two first sealing grooves are different, the cross-sectional diameters of the two sealing rings in the uncompressed state are equal, the sealing ring has a greater compression rate in the first sealing groove with a smaller volume, and the first sealing groove has a greater filling rate. Accordingly, the present invention can reduce the friction between the valve core and the valve body during movement by increasing the volume of one of the first sealing grooves, compared to the solution of using two first sealing grooves with smaller volumes.

[0063] Specifically, if Figure 3As shown, the inner circumference of the valve cavity 110 and the outer circumference of the valve core 200 are parallel to the axial direction X, and a plane parallel to the axial direction X is used as a cutting surface. The cross section of the first sealing groove cut by the cutting surface is rectangular, and the groove width W of the two first sealing grooves along the axial direction is equal. On this basis, the cross-sectional diameters of the two sealing rings in the uncompressed state are equal, and the groove depths H of the two first sealing grooves are not equal. Accordingly, in the assembled state, the first sealing groove with a relatively small groove depth H and the inner circumference of the valve cavity 110 jointly form a smaller cross-sectional area than the accommodation space formed by the other first sealing groove, so that the sealing ring set in the first sealing groove with a relatively small groove depth H is compressed to a greater extent in the assembled state, and the proportion of filling in the accommodation space is higher, thereby achieving a higher compression rate and filling rate of the sealing ring compared with the other sealing ring, thereby achieving a different design of the compression rate and filling rate of the two sealing rings. Through the above-mentioned structural design, on the basis of utilizing the two first sealing grooves to optimize the sealing performance between the valve body 100 and the valve core 200, the utility model adopts a design with different compression rates and filling rates for the sealing rings accommodated in the two first sealing grooves, thereby reducing the friction between the valve core and the valve body during movement.

[0064] In some embodiments, by designing the structures of the two first sealing grooves differently (i.e., the structures of the two sealing rings are the same), or by designing the structures of the two sealing rings differently (i.e., the structures of the two first sealing grooves are the same), or by designing the structures of the two sealing rings differently and designing the structures of the two first sealing grooves differently at the same time, the utility model can also achieve only one of the difference in compression rate and filling rate of the two sealing rings. For example, the compression rates of the two sealing rings are different and the filling rates of the two sealing rings in their respective corresponding first sealing grooves are the same. For example, the filling rates of the two sealing rings in their respective corresponding first sealing grooves are different and the compression rates of the two sealing rings are the same. Both are not limited to the above-mentioned embodiments.

[0065] It should be noted that Figure 3 The cross-sectional structure of the sealing ring shown in the figure is only schematic, and specifically shows the cross-sectional structure of the sealing ring in the uncompressed state, so as to facilitate the observation of the relationship between the cross-sectional diameters of the two sealing rings in the uncompressed state. For other structures, such as the valve body 100 and the valve core 200, they are still illustrated as a combined structure in the assembled state, so the drawings also show that part of the cross-sectional profile of the sealing ring intersects with part of the cross-sectional profile of the valve body 100 and the valve core 200, and those skilled in the art can understand that the above-mentioned intersection is only exemplary and does not limit the application of the present application in various embodiments.

[0066] like Figure 2 and Figure 3As shown, in one embodiment of the present invention, the valve structure further has a valve port 120, which may not be directly disposed on the valve body 100, but may also be directly disposed on the valve body 100. Specifically, the valve port 120 is located at one end of the valve body 100 in the axial direction X, that is, the opening direction of the valve port 120 is toward one side in the axial direction X. For ease of understanding and description, in this specification, the first sealing groove relatively close to the valve port 120 in the axial direction X is named as the first groove 211, and the other first sealing groove is named as the second groove 212. At the same time, the sealing ring accommodated in the first groove 211 is named as the first sealing ring 221, and the sealing ring accommodated in the second groove 212 is named as the second sealing ring 222. In the initial state, the compression rate of the first sealing ring 221 may be less than the compression rate of the second sealing ring 222, and the filling rate of the first sealing ring 221 in the first groove 211 may be less than the filling rate of the second sealing ring 222 in the second groove 212. In other words, based on the difference in the compression rate and filling rate of the two sealing rings achieved through the difference in the design of the two first sealing grooves, in this embodiment, the cross-sectional diameters of the two sealing rings in the uncompressed state are designed to be equal, and the groove depth H of the first groove 211 is designed to be greater than the groove depth H of the second groove 212. At this time, in the assembled state, the second sealing ring 222 is compressed to a greater extent, and its filling ratio in the accommodating space formed by the second groove 212 is higher, thereby achieving that the second sealing ring 222 has a higher compression rate and filling rate than the first sealing ring 221. On this basis, the medium flow direction of the valve structure proposed by the utility model is to flow out of the valve port 120. For example, the medium can flow into the valve cavity 110 from the through hole 130, and flow out of the valve cavity 110 from the valve port 120, that is, the medium in Figure 2 The flow direction in can be roughly understood as "side in and bottom out". Through the above structural design, the utility model can be adaptively designed according to the medium flow direction of the valve structure to meet the sealing needs of the high and low pressure differences generated by the specific flow direction. The valve core 200 is provided with a balance channel 201, and the valve port 120 is connected to the second groove 212 through the balance channel 201. The through hole 130 is connected to the first groove 211. Specifically, when the valve structure adopts the flow direction of the medium "side in and bottom out", the high-pressure medium flows into the valve cavity 110 from the through hole 130, the first groove 211 is in the high-pressure area, and the filling rate and compression rate of the first sealing ring 221 are relatively small (it can still squeeze the first sealing ring 221 through the high-pressure area to form a self-seal). At the same time, the second groove 212 is in the low-pressure area, and the filling rate and compression rate of the second sealing ring 222 are relatively large (thereby ensuring sufficient sealing performance). Accordingly, through the differentiated structural design of the two first sealing grooves, the utility model can further reduce the movement resistance of the valve core 200 on the basis of improving the sealing performance.

[0067] See also Figure 7 , Figure 7A partial enlarged cross-sectional view of a valve structure in another exemplary embodiment that can embody the principle of the utility model is representatively shown in FIG. Figure 3 Of Figure 2 magnified area.

[0068] Different from Figure 2 and Figure 3 In the embodiment shown, the valve structure adopts the medium flow direction of "side in and bottom out", such as Figure 7 As shown, in one embodiment of the present invention, in the initial state, the compression rate of the first sealing ring 221 can be greater than the compression rate of the second sealing ring 222, and the filling rate of the first sealing ring 221 in the first groove 211 can be greater than the filling rate of the second sealing ring 222 in the second groove 212. In other words, based on the difference in the compression rate and filling rate of the two sealing rings achieved by the difference in the design of the two first sealing grooves, in this embodiment, the cross-sectional diameters of the two sealing rings in the uncompressed state are designed to be equal, and the groove depth H of the first groove 211 is designed to be smaller than the groove depth H of the second groove 212. At this time, in the assembled state, the first sealing ring 221 is compressed to a greater extent, and its filling ratio in the accommodation space formed by the first groove 211 is higher, thereby achieving a higher compression rate and filling rate of the first sealing ring 221 than the second sealing ring 222. On this basis, the valve structure proposed in the utility model can also adopt the flow direction design of the medium "inlet from the bottom and outlet from the side", that is, the medium can flow into the valve cavity 110 from the valve port 120, and flow out of the valve cavity 110 from the through hole 130. The valve core 200 is provided with a balance channel 201, and the valve port 120 is connected with the second groove 212 through the balance channel 201. The through hole 130 is connected with the first groove 211. Specifically, when the valve structure adopts the flow direction of the medium "inlet from the bottom and outlet from the side", the high-pressure medium flows into the valve cavity 110 from the valve port 120, the first groove 211 is in the low-pressure area, and the filling rate and compression rate of the first sealing ring 221 are relatively large (thereby ensuring sufficient sealing performance). At the same time, the second groove 212 is in the high-pressure area, and the filling rate and compression rate of the second sealing ring 222 are relatively small (it can still squeeze the second sealing ring 222 through the high-pressure area to form a self-seal).

[0069] See also Figure 8 , Figure 8 A partial enlarged cross-sectional view of a valve structure in another exemplary embodiment that can embody the principle of the utility model is representatively shown in FIG. Figure 3 Of Figure 2 magnified area.

[0070] Different from Figure 3 or Figure 7 In the embodiment shown, the difference in the compression rate and the filling rate of the sealing ring is achieved by the difference in the structural design of the first sealing groove, such as Figure 8 As shown, in one embodiment of the present invention, the two first sealing grooves may also adopt the same structure, and the difference in compression rate and filling rate can be achieved by different designs of the sealing ring structures. Figure 8 As shown, the inner circumference of the valve cavity 110 and the outer circumference of the valve core 200 are parallel to the axial direction X, and the groove widths W of the two first sealing grooves are equal. On this basis, the cross-sectional diameters of the two sealing rings in the uncompressed state are equal, and the groove depths H of the two first sealing grooves are not equal. Accordingly, in the assembled state, the shapes (i.e., cross-sectional areas) of the two accommodation spaces formed by the two first sealing grooves and the inner circumference of the valve cavity 110 are the same. At this time, the sealing ring with a relatively large cross-sectional diameter is compressed to a greater extent in the assembled state, and a higher proportion of the sealing ring is filled in the accommodation space. Therefore, the sealing ring has a higher compression rate and filling rate than the other sealing ring, thereby realizing the difference design of the compression rate and filling rate of the two sealing rings.

[0071] like Figure 8 As shown, based on the difference in compression rate and filling rate of the sealing rings through the difference in structure design, in one embodiment of the utility model, the medium flow direction of the valve structure is based on the above-mentioned "side in and bottom out", that is, the compression rate and filling rate of the first sealing ring 221 are less than the compression rate and filling rate of the second sealing ring 222. Based on the difference in compression rate and filling rate of the two sealing rings through the difference in design, in this embodiment, the cross-sectional shape (i.e., cross-sectional area) of the two first sealing grooves is designed to be the same, and the cross-sectional diameter of the first sealing ring 221 is designed to be greater than the cross-sectional diameter of the second sealing ring 222. At this time, in the assembled state, the second sealing ring 222 is compressed to a greater extent, and its filling ratio in the accommodation space formed by the second groove 212 is higher, thereby achieving that the second sealing ring 222 has a higher compression rate and filling rate than the first sealing ring 221. In some embodiments, when the medium flow direction of the valve structure adopts the above-mentioned "bottom-in and side-out" design, and when the cross-sectional shapes (i.e., cross-sectional areas) of the two first sealing grooves are the same, the cross-sectional diameter of the first sealing ring 221 may also be smaller than the cross-sectional diameter of the second sealing ring 222, and is not limited to the above-mentioned embodiments.

[0072] It should be noted that in Figure 3 , Figure 7 or Figure 8In the illustrated embodiment, in order to achieve a differentiated design of the compression rate and the filling rate of the two sealing rings, one of the differentiated design of the groove depth H of the two first sealing grooves and the differentiated design of the cross-sectional diameter of the two sealing rings is selectively adopted. It should be understood that in various possible embodiments consistent with the design concept of the utility model, in order to achieve a differentiated design of the compression rate and the filling rate of the two sealing rings, when the groove depth H of the two first sealing grooves adopts a differentiated design, it is not limited whether the cross-sectional diameters of the two sealing rings adopt a differentiated design, or, when the cross-sectional diameters of the two sealing rings adopt a differentiated design, it is not limited whether the groove depth H of the two first sealing grooves adopts a differentiated design. In other words, in some embodiments, the cross-sectional diameters of the two sealing rings are not equal, and the groove depths H of the two first sealing grooves are also not equal. For example, when the valve structure adopts the above-mentioned medium flow direction of "side in and bottom out", that is, when the compression rate and filling rate of the first sealing ring 221 are less than the compression rate and filling rate of the second sealing ring 222, the groove depth H of the first groove 211 can be greater than the groove depth H of the second groove 212, and the cross-sectional diameter of the first sealing ring 221 can be less than the cross-sectional diameter of the second sealing ring 222. For another example, still taking the above-mentioned medium flow direction as an example, when the groove depth H of the first groove 211 is greater than the groove depth H of the second groove 212, the cross-sectional diameter of the first sealing ring 221 can even be greater than the cross-sectional diameter of the second sealing ring 222, or when the cross-sectional diameter of the first sealing ring 221 is less than the cross-sectional diameter of the second sealing ring 222, the groove depth H of the first groove 211 can even be less than the groove depth H of the second groove 212, and it is only necessary to ensure that the compression rate and filling rate of the first sealing ring 221 are less than the compression rate and filling rate of the second sealing ring 222. Of course, when the valve structure adopts the above-mentioned "bottom-in and side-out" medium flow direction, that is, when the compression rate and filling rate of the first sealing ring 221 are greater than the compression rate and filling rate of the second sealing ring 222, the difference design of the above-mentioned two first sealing grooves and / or two sealing rings can also be referred to, which will not be elaborated here.

[0073] See also Fig. 9 , Fig. 9 A partial enlarged cross-sectional view of a valve structure in another exemplary embodiment that can embody the principle of the utility model is representatively shown in FIG. Figure 3 Of Figure 2 magnified area.

[0074] Different from Figure 3 , Figure 7 or Figure 8 In the embodiment shown, the first sealing groove is arranged on the outer peripheral surface of the valve core 200. Fig. 9As shown, in one embodiment of the present invention, the first sealing groove may also be provided on the valve body 100, that is, the first sealing groove is provided on the inner circumference of the valve core 200. In other words, in various possible embodiments that conform to the design concept of the present invention, the first sealing groove may be provided on the inner circumference of the valve cavity 110 or the outer circumference of the valve core 200.

[0075] like Figure 3 As shown, in one embodiment of the utility model, the outer peripheral surface of the valve core 200 is provided with an oil storage groove 230 in the circumferential direction, that is, the oil storage groove 230 and the first sealing groove are jointly arranged on the outer peripheral surface of the valve core 200, and the oil storage groove 230 is located between the two first sealing grooves in the axial direction X, so that the oil storage groove 230 is used to contain the lubricating oil and an oil seal is formed between the two first sealing grooves. Through the above structural design, the utility model can add corresponding lubricating oil to the first sealing groove during the assembly process, and use the two sealing structures formed by the two first sealing grooves and the two sealing rings to seal the lubricating oil in the oil storage groove 230 to form an isolation layer, which plays a certain sealing role. At the same time, the lubricating oil can play a lubricating role when the valve core 200 and the valve body 100 move relative to each other, reducing the movement resistance. In some embodiments, when the first sealing groove is arranged on the inner peripheral surface of the valve cavity 110, the oil storage groove 230 can also be opened on the inner peripheral surface of the valve cavity 110. In other words, in various possible embodiments that conform to the design concept of the present invention, the inner circumferential surface of the valve cavity 110 or the outer circumferential surface of the valve core 200 is provided with an oil storage groove 230 in the circumferential direction, and the oil storage groove 230 and the first sealing groove are provided on the same one of the inner circumferential surface of the valve cavity 110 and the outer circumferential surface of the valve core 200. In other embodiments, when the first sealing groove is provided on one of the inner circumferential surface of the valve cavity 110 and the outer circumferential surface of the valve core 200, the oil storage groove 230 may also be provided on the other one of the inner circumferential surface of the valve cavity 110 and the outer circumferential surface of the valve core 200.

[0076] like Figure 3As shown, based on the structural design of the oil storage tank 230, in one embodiment of the present utility model, the oil storage tank 230 and the first sealing groove are still set on the outer peripheral surface of the valve core 200 as an example, the outer peripheral surface of the valve core 200 is located between the two first sealing grooves. The area is recessed relative to other areas to form the oil storage tank 230, and the oil storage tank 230 is connected with the first sealing groove in the axial direction X. In other words, the two sides of the oil storage tank 230 in the axial direction X do not have a groove wall of a solid structure. In addition, for the two side groove walls of the first sealing groove in the axial direction X, the heights of the two side groove walls along the radial direction are not equal. Through the above structural design, the utility model can realize the maximum design of the oil storage tank 230 in the axial direction X, which is conducive to increasing the accommodation space of the lubricating oil and improving the lubrication effect. In some embodiments, the first sealing groove and the oil storage tank 230 can also be set on the inner peripheral surface of the valve cavity 110 at the same time, then the area of ​​the inner peripheral surface of the valve cavity 110 located between the two first sealing grooves is recessed relative to other areas to form the oil storage tank 230, which is not limited to the above embodiment.

[0077] See also Fig.10 , Fig.10 A partial enlarged cross-sectional view of a valve structure in another exemplary embodiment that can embody the principle of the utility model is representatively shown in FIG. Figure 3 Of Figure 2 magnified area.

[0078] Different from Figure 3 In the embodiment shown, the outer peripheral surface of the valve core 200 is located between the two first sealing grooves and the area is integrally recessed to form the oil storage groove 230. Fig. 9 As shown, in one embodiment of the present invention, taking the example that both the oil storage tank 230 and the first sealing groove are arranged on the outer peripheral surface of the valve core 200, a part of the area of ​​the outer peripheral surface of the valve core 200 located between the two first sealing grooves is recessed relative to other parts to form the oil storage tank 230, and accordingly, the oil storage tank 230 and the first sealing groove are arranged at intervals in the axial direction X. In other words, the oil storage tank 230 has a groove wall of a solid structure on both sides of the axial direction X, and in addition, for the groove walls on both sides of the first sealing groove in the axial direction X, the heights of the groove walls on both sides are equal in the radial direction. Through the above structural design, the present invention can extend the leakage path between the oil storage tank 230 and the first sealing groove, and further improve the sealing effect between the oil storage tank 230 and the first sealing groove. In some embodiments, the first sealing groove and the oil storage tank 230 can also be simultaneously arranged on the inner peripheral surface of the valve cavity 110, and a part of the area of ​​the inner peripheral surface of the valve cavity 110 located between the two first sealing grooves is recessed relative to other parts to form the oil storage tank 230, which is not limited to the above embodiment.

[0079] like Figure 2 , Figures 4 to 6As shown, in one embodiment of the present invention, the valve core 200 may include a piston 240 and a press sleeve 250, and the press sleeve 250 is connected to the lower end of the piston 240. The piston 240 is provided with a first boss 241 in the circumferential direction, and the press sleeve 250 is provided with a second boss 251 in the circumferential direction, and the first boss 241 and the second boss 251 are arranged at intervals along the axial direction X. On this basis, the space between the first boss 241 and the second boss 251 forms a second sealing groove 260, and the second sealing groove 260 accommodates a sealing ring 270, and the outer edge of the sealing ring 270 can abut against the inner circumference of the valve port 120, thereby realizing the sealing of the valve core 200 and the valve body 100 at the valve port 120.

[0080] like Figures 4 to 6 As shown, based on the structural design of the second sealing groove 260 and the sealing ring 270, in one embodiment of the present utility model, the lower surface of the first boss 241 may be provided with a first protrusion 2411, and the upper surface of the second boss 251 may be provided with a second protrusion 2511. Correspondingly, the upper surface of the sealing ring 270 may be provided with a first groove 271, and the lower surface of the sealing ring 270 may be provided with a second groove 272. Accordingly, the first protrusion 2411 is accommodated in the first groove 271, and the second protrusion 2511 is accommodated in the second groove 272. During press-fitting, the first protrusion 2411 is pressed and fitted with the first groove 271, and the second protrusion 2511 is pressed and fitted with the second groove 272, effectively preventing the sealing ring from coming out. Through the above structural design, the present utility model can further improve the assembly tightness of the sealing ring 270 and the second sealing groove 260, and can extend the leakage path between the second sealing groove 260 and the sealing ring 270, further improving the sealing performance.

[0081] like Figure 4 As shown, based on the structural design of the first protrusion 2411 and the second protrusion 2511, in one embodiment of the present invention, along the radial direction, the first protrusion 2411 is located in the middle of the first boss 241, and the second protrusion 2511 is located in the middle of the second boss 251, and the first protrusion 2411 and the second protrusion 2511 can be staggered. Through the above structural design, the present invention can stagger the pressing positions of the first protrusion 2411 and the second protrusion 2511 on both sides of the sealing ring 270 along the radial direction, so as to avoid the stress of the sealing ring 270 being concentrated at one position.

[0082] like Figure 4As shown, based on the structural design of the first protrusion 2411 and the second protrusion 2511, in one embodiment of the present invention, a first gap G1 may be provided between the area of ​​the lower surface of the first boss 241 located outside the first protrusion 2411 and the area of ​​the upper surface of the sealing ring 270 located outside the first groove 271. In addition, a second gap G2 may be provided between the area of ​​the upper surface of the second boss 251 located outside the second protrusion 2511 and the area of ​​the lower surface of the sealing ring 270 located outside the second groove 272. Through the above structural design, the present invention can use the above gap to provide expansion space for the sealing ring 270, and avoid the expansion of the sealing ring 270 being concentrated in its outer edge area. Since the outer edge area of ​​the sealing ring 270 is the area where it seals with the valve port 120, when the expansion of the sealing ring 270 is concentrated in its outer edge area, it will affect the sealing effect between the valve core 200 and the valve port 120. The present invention can further ensure the sealing performance of the sealing ring 270 between the valve core 200 and the valve port 120.

[0083] like Figure 4 As shown, based on the structural design of the first protrusion 2411 and the second protrusion 2511, in one embodiment of the present utility model, the first boss 241 may be provided with a first balancing channel 2412, the first balancing channel 2412 passes through the first boss 241 in parallel with the axial direction X, and one end of the first balancing channel 2412 opens on the end surface of the first boss 2411 facing the second boss 251. In addition, the second boss 251 may be provided with a second balancing channel 2512, the second balancing channel 2512 passes through the second boss 251 in parallel with the axial direction X, and one end of the second balancing channel 2512 opens on the end surface of the second boss 2511 facing the first boss 241. Through the above structural design, the utility model can use the above balancing channel to drain the medium in the valve cavity 110 to the upper and lower parts of the sealing ring 270, so that the sealing ring 270 is squeezed in the circumferential direction toward both sides in the area of ​​the sealing ring 270 close to the valve port 120 under the effect of the drainage pressure, so that the outer area of ​​the sealing ring 270 resists the squeezing of the pressure difference, so that the force of the sealing ring 270 tends to be balanced, which is conducive to reducing or avoiding the deformation of the sealing ring 270 and improving the sealing performance of the valve structure. In some embodiments, the first balancing channel 2412 can also extend in other directions and penetrate the first boss 241, and the second balancing channel 2512 can also extend in other directions and penetrate the second boss 251.

[0084] 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 of the valve structures shown in the drawings or described in this specification or any components of the valve structures.

[0085] In summary, the valve structure proposed in the present invention has two first sealing grooves opened in the circumferential direction on the inner circumferential surface of the valve cavity 110 or the outer circumferential surface of the valve core 200. The two first sealing grooves are arranged at intervals along the axial direction X and are both located on one side of the through hole 130 of the valve body 100 in the axial direction X. The two first sealing grooves both contain sealing rings, which are suitable for achieving the sealing between the outer circumferential surface of the valve core 200 and the inner circumferential surface of the valve body 100. The two sealing rings have different compression rates, and / or the two sealing rings have different filling rates in their respective corresponding first sealing grooves. Through the above-mentioned structural design, on the basis of optimizing the sealing performance between the valve body 100 and the valve core 200 by using the two first sealing grooves, the present invention uses the sealing rings contained in the two first sealing grooves with different compression rates and / or filling rates to reduce the compression rate and / or filling rate corresponding to one of the sealing rings, thereby reducing the friction between the valve core and the valve body during movement.

[0086] The exemplary embodiments of the valve structure proposed by the present utility model are described and / or illustrated in detail above. However, the embodiments of the present utility model 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", "one" 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.

[0087] Although the valve structure proposed by the present invention has been described according to different specific embodiments, those skilled in the art will recognize that the implementation of the present invention can be modified within the spirit and scope of the claims.

Claims

1. A valve structure, comprising: A valve body is provided with a through hole, wherein the through hole is located at the outer periphery of the valve body and is connected to the valve cavity of the valve body; and A valve core is movably disposed in the valve cavity along the axial direction; Among them, two first sealing grooves are opened in the circumferential direction on the inner circumferential surface of the valve cavity or the outer circumferential surface of the valve core, the two first sealing grooves are arranged at intervals in the axial direction and are both located on one side of the through hole in the axial direction, the two first sealing grooves both accommodate sealing rings, and the sealing rings are suitable for achieving sealing between the outer circumferential surface of the valve core and the inner circumferential surface of the valve cavity, the compression rates of the two sealing rings are different, and / or the filling rates of the two sealing rings in their respective corresponding first sealing grooves are different.

2. The valve structure according to claim 1, characterized in that: The valve structure has a valve port, one of the two first sealing grooves that is relatively close to the valve port in the axial direction is a first groove, and the other is a second groove, the sealing ring accommodated in the first groove is a first sealing ring, and the sealing ring accommodated in the second groove is a second sealing ring, the valve port is communicated with the second groove, and the through hole is communicated with the first groove; wherein: In the initial state, when the compression rate of the first sealing ring is greater than the compression rate of the second sealing ring, and the filling rate of the first sealing ring in the first groove is greater than the filling rate of the second sealing ring in the second groove, the medium of the valve structure flows in from the valve port; or In the initial state, when the compression rate of the first sealing ring is smaller than that of the second sealing ring, and the filling rate of the first sealing ring in the first groove is smaller than that of the second sealing ring in the second groove, the medium flow direction of the valve structure is outflow from the valve port.

3. The valve structure according to claim 1, characterized in that: The two first sealing grooves are of the same shape and size, and the cross-sectional diameters of the two sealing rings in an uncompressed state are not equal; or The volumes of the two first sealing grooves are different, and the cross-sectional diameters of the two sealing rings in an uncompressed state are equal.

4. The valve structure according to claim 1, characterized in that: Taking a plane parallel to the axial direction as a cutting plane, the cross section of the first sealing groove cut by the cutting plane is rectangular, and the groove widths of the two first sealing grooves along the axial direction are equal; wherein: The groove depths of the two first sealing grooves are equal, and the cross-sectional diameters of the two sealing rings in an uncompressed state are unequal; or The cross-sectional diameters of the two sealing rings in an uncompressed state are equal, and the groove depths of the two first sealing grooves are unequal.

5. The valve structure according to claim 1, characterized in that: An oil storage groove is circumferentially formed on the inner circumferential surface of the valve cavity or the outer circumferential surface of the valve core. The oil storage groove is axially located between the two first sealing grooves. The oil storage groove is suitable for containing lubricating oil to form an oil seal between the two first sealing grooves.

6. The valve structure according to claim 5, characterized in that: The first sealing groove and the oil storage groove are both arranged on the inner circumferential surface of the valve cavity, a part of the area of ​​the inner circumferential surface between the two first sealing grooves is recessed relative to other parts to form the oil storage groove, and the oil storage groove is spaced apart from the first sealing groove in the axial direction; or The first sealing groove and the oil storage groove are both arranged on the outer peripheral surface of the valve core, a part of the outer peripheral surface located between the two first sealing grooves is recessed relative to other parts to form the oil storage groove, and the oil storage groove is spaced apart from the first sealing groove in the axial direction.

7. The valve structure according to claim 5, characterized in that: The first sealing groove and the oil storage groove are both arranged on the inner circumferential surface of the valve cavity, the area of ​​the inner circumferential surface between the two first sealing grooves is as a whole recessed relative to other areas to form the oil storage groove, and the oil storage groove is axially connected with the first sealing groove; or The first sealing groove and the oil storage groove are both arranged on the outer peripheral surface of the valve core, and the area of ​​the outer peripheral surface located between the two first sealing grooves is recessed relative to other areas as a whole to form the oil storage groove, and the oil storage groove is connected to the first sealing groove in the axial direction.

8. The valve structure according to claim 1, characterized in that: The valve structure has a valve port, 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 a second sealing groove, the second sealing groove accommodates a sealing ring, and the sealing ring is suitable for achieving sealing between the valve core and the valve port.

9. The valve structure according to claim 8, characterized in that: The lower surface of the first boss is provided with a first protrusion, the upper surface of the second boss is provided with a second protrusion, the upper surface of the sealing ring is provided with a first groove, the lower surface of the sealing ring is provided with a second groove, the first protrusion is accommodated in the first groove, and the second protrusion is accommodated in the second groove.

10. The valve structure according to claim 9, characterized in that: In radial direction, the first protrusion and the second protrusion are staggered; and / or The lower surface of the first boss is located in the area outside the first protrusion, and has a first gap with the area outside the upper surface of the sealing ring is located in the first groove; the upper surface of the second boss is located in the area outside the second protrusion, and has a second gap with the area outside the lower surface of the sealing ring is located in the second groove.

11. The valve structure according to claim 9, characterized in that: The first boss is provided with a first balancing channel, which passes through the first boss, and one end of the first balancing channel opens on the end surface of the first protrusion facing the second boss; the second boss is provided with a second balancing channel, which passes through the second boss, and one end of the second balancing channel opens on the end surface of the second protrusion facing the first boss.

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