A valve core assembly and check valve

Abstract

The utility model relates to a valve piece technical field especially relates to a valve core subassembly and check valve. The valve core subassembly includes first guide seat, second guide seat and check valve core, and first guide seat includes first main body seat and first guide bush, and forms first intercommunication mouth between both, and second guide seat includes second main body seat and second guide bush, and forms second intercommunication mouth between both, and first main body seat and second main body seat are connected, and the internal space between both forms check cavity, and check valve core includes plugging part and the first guide rod department and the second guide rod department connected in the both ends of plugging part, and first guide rod department is set up in first guide bush, and second guide rod department is set up in second guide bush, and plugging part can block or open first intercommunication mouth. The valve core subassembly can reduce even eliminate the whistling and vibration noise produced in the working process of check valve, thereby can prolong the service life of check valve.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a valve core assembly and a check valve. Background Technology

[0002] A check valve is a type of valve that automatically opens and closes based on the flow of the medium itself. Its core function is to prevent backflow and ensure unidirectional flow of the medium in the pipeline. Due to their advantages of high efficiency, energy saving, and reliable structure, check valves are widely used in fluid transportation systems.

[0003] Check valves in related technologies typically include a valve body and a valve core assembly installed within the valve body. The valve core assembly includes a valve seat, a guide seat, a valve core, and a return spring. The valve seat is coaxially mounted within the valve body. One end of the guide seat is fixedly connected to the valve seat, with a sealing ring sandwiched between them. The other end of the guide seat has a guide hole. The valve core includes a sealing part and a guide rod part, and is movably positioned between the valve seat and the guide seat. The guide rod part moves through the guide hole of the guide seat. When the medium pressure at the valve body inlet is greater than the medium pressure at the valve body outlet, it pushes the valve core axially, causing the sealing part to move away from the sealing ring, allowing the fluid medium to pass through the gap between the sealing part and the valve seat. When the medium pressure at the valve body outlet is greater than the medium pressure at the valve body inlet, the valve core presses tightly against the sealing ring, thus achieving unidirectional flow of the fluid medium.

[0004] However, the above-mentioned check valve still has the following problems in actual use: when the valve core moves along its axis, the end near the sealing part is far from the guide hole and is prone to shaking, which causes the sealing part and the return spring to resonate, thus generating whistling and vibration noise, affecting the performance of the check valve and its service life.

[0005] Therefore, there is an urgent need for a valve core assembly and a check valve to solve the above problems. Utility Model Content

[0006] The purpose of this utility model is to provide a valve core assembly and a check valve that can ensure the stability of the valve core during movement, thereby reducing or even eliminating the whistling and vibration noise generated by the check valve during operation, and thus extending the service life of the check valve.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A valve core assembly, comprising:

[0009] The first guide seat includes a first main body seat and a first guide sleeve disposed on the first main body seat, and a first communication port is formed between the first main body seat and the first guide sleeve;

[0010] The second guide seat includes a second main body seat and a second guide sleeve disposed on the second main body seat, and a second communication port is formed between the second main body seat and the second guide sleeve; the first main body seat and the second main body seat are connected, and the internal space between the first main body seat and the second main body seat forms a check cavity, and the two ends of the check cavity can be connected to the first communication port and the second communication port respectively;

[0011] The check valve core includes a blocking part, a first guide rod part, and a second guide rod part. The first guide rod part and the second guide rod part are respectively connected to the two ends of the blocking part. The first guide rod part is movably inserted into the first guide sleeve, and the second guide rod part is movably inserted into the second guide sleeve. The check valve core can move axially along the check cavity to block or open the first communication port.

[0012] As a preferred embodiment of the valve core assembly provided by this utility model, the valve core assembly further includes a return spring, which is sleeved on the second guide rod portion, and the two ends of the return spring respectively abut against the sealing portion and the second guide seat.

[0013] As a preferred embodiment of the valve core assembly provided by this utility model, a first limiting structure is provided at one end of the sealing part facing the second guide seat, and one end of the reset spring is sleeved outside the first limiting structure;

[0014] And / or, the second guide seat is provided with a second limiting structure at one end facing the blocking part, and the other end of the reset spring is sleeved outside the second limiting structure.

[0015] As a preferred embodiment of the valve core assembly provided by this utility model, one of the first main body and the second main body is provided with an annular groove on its outer periphery, and the other is provided with an embedding part on its inner wall, the embedding part being embedded in the annular groove.

[0016] As a preferred embodiment of the valve core assembly provided by this utility model, the width of the annular groove along the axial direction of the first main body is greater than the width of the embedded part.

[0017] As a preferred embodiment of the valve core assembly provided by this utility model, the inner wall of the first guide sleeve is provided with a plurality of spaced first protrusions, and the outer wall of the first guide rod portion contacts and slides with the first protrusions.

[0018] And / or, the inner wall of the second guide sleeve is provided with a plurality of second protrusions arranged at intervals, and the outer wall of the second guide rod portion contacts and slides with the second protrusions.

[0019] As a preferred embodiment of the valve core assembly provided by this utility model, the first main body seat includes:

[0020] The first seat has a stepped hole that extends through it along its axial direction. A stepped surface is formed between the small and large sections of the stepped hole. The sealing part cooperates with the stepped surface to seal the first communication port. The first seat is used to connect to the second main seat.

[0021] The first connecting part is used to connect the first guide sleeve to the small hole segment.

[0022] As a preferred embodiment of the valve core assembly provided by this utility model, the second main body includes a second seat body and a second connecting part. The second seat body is used to connect to the first main body, the second seat body is arranged around the second guide sleeve, and the second guide sleeve is connected to the second seat body through the second connecting part.

[0023] This utility model also provides a check valve, comprising:

[0024] The valve body has a valve cavity;

[0025] The valve core assembly as described above is installed in the valve cavity, and the first communication port of the valve core assembly can be connected to the inlet of the valve cavity.

[0026] As a preferred embodiment of the check valve provided by this utility model, at least a portion of the outer wall of the first guide seat of the valve core assembly is inclined outward to abut against the cavity wall of the valve chamber;

[0027] And / or, at least a portion of the outer wall of the second guide seat of the valve core assembly is inclined outward to abut against the cavity wall of the valve chamber.

[0028] The beneficial effects of this utility model are:

[0029] The valve core assembly provided by this utility model, by setting a first guide seat with a first guide sleeve and a second guide seat with a second guide sleeve, and with the first guide rod portion of the check valve core movably passing through the first guide sleeve and the second guide rod portion of the check valve core movably passing through the second guide sleeve, allows the first and second guide rod portions at both ends of the sealing part to slide stably in the first and second guide sleeves respectively when the check valve core moves axially along the check cavity. This ensures the stability of the check valve core during movement, prevents it from shaking, and avoids resonance with the return spring. This reduces or even eliminates the whistling and vibration noise generated by the check valve during operation, ensuring the performance of the check valve and extending its service life. By connecting the first and second main seats, the valve core assembly can be formed as a whole, improving the ease of assembly between the valve core assembly and the valve body.

[0030] The check valve provided by this utility model, by applying the above-mentioned valve core assembly, can ensure the stability of the valve core during movement, thereby reducing or even eliminating the whistling and vibration noise generated by the check valve during operation, thus extending the service life of the check valve, and improving the ease of assembly of the valve core assembly and the valve body. Attached Figure Description

[0031] Figure 1 This is a cross-sectional schematic diagram of the check valve provided in this embodiment of the utility model;

[0032] Figure 2 This is a cross-sectional schematic diagram of the valve core assembly provided in an embodiment of the present utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the first guide seat provided in an embodiment of the present utility model;

[0034] Figure 4 This is a cross-sectional schematic diagram of the first guide seat provided in an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the structure of the check valve core provided in this embodiment of the utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the second guide seat provided in an embodiment of the present invention;

[0037] Figure 7 yes Figure 2 A magnified view of a portion at point A.

[0038] In the picture:

[0039] 10. Valve core assembly; 1001. Check chamber;

[0040] 11. First guide seat; 110. First connecting port; 111. First main body seat; 1110. Embedding part; 1111. First seat body; 11111. Small hole section; 11112. Large hole section; 11113. Stepped surface; 1112. First connecting part; 112. First guide sleeve; 1121. First protrusion; 113. Mounting ring;

[0041] 12. Second guide seat; 120. Second connecting port; 121. Second main body seat; 1210. Annular groove; 1211. Second seat body; 1212. Second connecting part; 122. Second guide sleeve; 1221. Second protrusion;

[0042] 13. Check valve core; 131. Sealing part; 1311. Sealing body; 1312. Sealing element; 132. First guide rod part; 133. Second guide rod part; 134. First limiting structure; 1341. Limiting protrusion;

[0043] 14. Return spring;

[0044] 20. Valve body; 2001. Valve cavity; 21. Valve body; 211. First limiting step; 22. Valve cover; 221. Second limiting step. Detailed Implementation

[0045] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0046] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0048] Figure 1 A cross-sectional schematic diagram of the check valve provided in this embodiment is shown. Figure 1 As shown, this embodiment provides a check valve, which includes a valve body 20 and a valve core assembly 10. The valve body 20 has a valve cavity 2001. The valve body 20 is connected to an external pipeline, and the valve core assembly 10 is installed in the valve cavity 2001 to connect or disconnect the passage between the external pipeline and the valve cavity 2001, and only allows the fluid medium to flow from the inlet to the outlet of the valve cavity 2001, thereby realizing the unidirectional flow of the fluid medium in the pipeline.

[0049] Figure 2 A cross-sectional schematic diagram of the valve core assembly 10 provided in this embodiment is shown. Figure 2 and combined Figure 1 As shown, the valve core assembly 10 includes a first guide seat 11, a second guide seat 12, and a check valve core 13. The first guide seat 11 includes a first main body seat 111 and a first guide sleeve 112 disposed on the first main body seat 111, and a first communication port 110 is formed between the first main body seat 111 and the first guide sleeve 112. The second guide seat 12 includes a second main body seat 121 and a second guide sleeve 122 disposed on the second main body seat 121, and a second communication port 120 is formed between the second main body seat 121 and the second guide sleeve 122. The first main body seat 111 and the second main body seat 121 are connected, and the first main body seat 111 and the second main body seat 122 are connected. The internal space between 21 forms a check cavity 1001. The two ends of the check cavity 1001 can be connected to the first connecting port 110 and the second connecting port 120, respectively. The check valve core 13 includes a blocking part 131, a first guide rod part 132 and a second guide rod part 133. The first guide rod part 132 and the second guide rod part 133 are respectively connected to the two ends of the blocking part 131. The first guide rod part 132 is movably inserted into the first guide sleeve 112 and the second guide rod part 133 is movably inserted into the second guide sleeve 122. The check valve core 13 can move along the axial direction of the check cavity 1001 so that the blocking part 131 blocks or opens the first connecting port 110.

[0050] Specifically, when the valve core assembly 10 is installed in the valve cavity 2001 of the valve body 20, the first connecting port 110 is located near the inlet of the valve cavity 2001, and the second connecting port 120 is connected to the outlet of the valve cavity 2001. When the liquid pressure at the inlet of the valve cavity 2001 is high, the liquid at the inlet of the valve cavity 2001 can push the check valve core 13 to move away from the first connecting port 110, so as to open the first connecting port 110. At this time, the liquid in the external pipeline can flow sequentially through the inlet of the valve cavity 2001, the first connecting port 110, the check cavity 1001, the second connecting port 120, and the outlet of the valve cavity 2001. When the liquid flows in the opposite direction, the liquid pressure can press the check valve core 13 against the first guide seat 11 to block the first connecting port 110, thereby realizing the unidirectional flow of liquid in the pipeline.

[0051] In some embodiments, the valve core assembly 10 further includes a return spring 14, which is sleeved on the second guide rod portion 133, and its two ends abut against the sealing portion 131 and the second guide seat 12, respectively. By providing the return spring 14, the sealing portion 131 of the check valve core 13 can be pressed against the first guide seat 11 under the elastic force of the return spring 14, thus preventing the sealing portion 131 from being pushed away from the first guide seat 11 by a small amount of liquid pressure, thereby opening the first communication port 110. In other words, when the liquid pressure at the inlet of valve chamber 2001 is greater than the sum of the liquid pressure at the outlet of valve chamber 2001 and the preload of return spring 14, the check valve core 13 can move away from the first connecting port 110 to open the first connecting port 110, allowing liquid to flow from the inlet of valve chamber 2001 to the outlet of valve chamber 2001; when the liquid pressure at the inlet of valve chamber 2001 is less than the sum of the liquid pressure at the outlet of valve chamber 2001 and the preload of return spring 14, the sealing part 131 can press tightly against the first guide seat 11 under the elastic force of return spring 14 to block the first connecting port 110.

[0052] The valve core assembly 10 provided in this embodiment, by setting a first guide seat 11 with a first guide sleeve 112 and a second guide seat 12 with a second guide sleeve 122, and the first guide rod portion 132 of the check valve core 13 movably passing through the first guide sleeve 112, and the second guide rod portion 133 of the check valve core 13 movably passing through the second guide sleeve 122, can ensure that when the check valve core 13 moves along the axial direction of the check cavity 1001, the first guide rod portion 132 and the second guide rod portion 133 at both ends of the blocking portion 131 slide stably in the first guide sleeve 112 and the second guide sleeve 122 respectively, thereby ensuring the stability of the check valve core 13 during the movement process, avoiding its shaking, and thus preventing resonance with the return spring 14, thereby reducing or even eliminating the whistling and vibration noise generated by the check valve during operation, so as to ensure the performance of the check valve and extend the service life of the check valve. By connecting the first main body seat 111 and the second main body seat 121, the valve core assembly 10 can be formed as a whole, thereby improving the ease of assembling the valve core assembly 10 with the valve body 20.

[0053] In some embodiments, the sealing part 131 includes a sealing body 1311 and a sealing element 1312. The two ends of the sealing body 1311 are respectively connected to a first guide rod 132 and a second guide rod 133. The sealing element 1312 is installed at the end of the sealing body 1311 facing the first communication port 110. When the check valve core 13 is in the sealing position, the sealing part 131 is pressed tightly against the first guide seat 11 under the elastic force of the return spring 14. The sealing element 1312 improves the sealing effect of the check valve core 13 on the first communication port 110. For example, the sealing element 1312 is a rubber gasket, which provides good sealing, is easy to assemble, and has low cost.

[0054] Figure 3 A schematic diagram of the structure of the first guide seat 11 provided in this embodiment is shown. Figure 4 A cross-sectional schematic diagram of the first guide seat 11 provided in this embodiment is shown. (See attached diagram.) Figures 3-4 and combined Figure 2 As shown, the first main body 111 includes a first seat body 1111 and a first connecting portion 1112. The first seat body 1111 has a stepped hole extending through it along its axial direction. A stepped surface 11113 is formed between the small hole section 11111 and the large hole section 11112 of the stepped hole. The sealing portion 131 cooperates with the stepped surface 11113 to seal the first communication port 110. The first seat body 1111 is used to connect to the second main body 121. The first guide sleeve 112 is connected to the small hole section 11111 through the first connecting portion 1112. This design makes the structure of the first main body 111 relatively simple, easy to process, improves processing effect, and reduces processing cost.

[0055] In some embodiments, the first seat 1111 includes a first ring seat and a second ring seat. The second ring seat is connected to one end of the first ring seat along the axial direction. The outer diameter and inner diameter of the first ring seat are larger than the outer diameter and inner diameter of the second ring seat, respectively, so that the cross-section of the first seat 1111 is T-shaped. At the same time, a stepped hole is formed inside the first seat 1111. The end of the first ring seat away from the second ring seat is connected to the second main seat 121. The first guide sleeve 112 passes through the second ring seat, and the two ends of the first connecting part 1112 are respectively connected to the outer wall of the first guide sleeve 112 and the inner wall of the second ring seat.

[0056] In some embodiments, the number of first connecting portions 1112 is at least two, and each first connecting portion 1112 is spaced apart circumferentially along the first guide sleeve 112 to improve the connection strength between the first main body 111 and the first guide sleeve 112, and to ensure the uniformity of force on the first main body 111 and the first guide sleeve 112 in the circumferential direction. For example, the number of first connecting portions 1112 is three, and the included angle between two adjacent first connecting portions 1112 is 120°, ensuring sufficient connection strength between the first main body 111 and the first guide sleeve 112 while ensuring sufficient flow area for the first communication port 110. Of course, in other embodiments, the number of first connecting portions 1112 can also be two, four, five, or even more.

[0057] like Figure 3 As shown, the inner wall of the first guide sleeve 112 is provided with a plurality of spaced first protrusions 1121, and the outer wall of the first guide rod portion 132 contacts and slides with the first protrusions 1121. This design can, on the one hand, reduce the material used in the first guide sleeve 112 to a certain extent, thereby reducing material costs; on the other hand, it can reduce the mating area between the first guide rod portion 132 and the hole wall of the first guide sleeve 112, reducing friction and wear, thereby improving the service life of the first guide seat 11 and the check valve core 13.

[0058] Figure 5 A schematic diagram of the structure of the check valve core 13 provided in this embodiment is shown. Figure 5 and combined Figure 2 As shown, a first limiting structure 134 is provided at one end of the sealing part 131 facing the second guide seat 12, and one end of the return spring 14 is sleeved on the first limiting structure 134. The first limiting structure 134 provides a limiting effect for the return spring 14, so that it always extends and retracts along its own axis, thereby ensuring the stability of its extension and retraction process and preventing vibration caused by radial offset, so as to further reduce the whistling and noise generated by the check valve during operation.

[0059] In some embodiments, the first limiting structure 134 includes a plurality of limiting protrusions 1341, each of which is spaced apart circumferentially along the second guide rod portion 133. This design can reduce the material used in the first limiting structure 134 while ensuring a good limiting effect on the return spring 14, thereby reducing material costs. Of course, in other embodiments, the first limiting structure 134 can also be an annular protrusion surrounding the second guide rod portion 133, achieving the same effect.

[0060] In some embodiments, at least a portion of the end face of the limiting protrusion 1341 facing the second guide seat 12 is inclined, and the inclined surface gradually slopes from the direction away from the second guide rod portion 133 towards the direction closer to the sealing portion 131. The inclined surface on the limiting protrusion 1341 can provide guidance for its assembly with the return spring 14, thereby improving the assembly efficiency between the return spring 14 and the check valve core 13.

[0061] Figure 6 A schematic diagram of the structure of the second guide seat 12 provided in this embodiment is shown. Figure 6 and combined Figure 2 As shown, a second limiting structure is provided at one end of the second guide seat 12 facing the sealing part 131, and the other end of the return spring 14 is sleeved outside the second limiting structure. The second limiting structure provides a limiting effect for the return spring 14, ensuring that it always extends and retracts along its own axis, thereby guaranteeing the stability of its extension and retraction process and preventing vibration caused by radial offset, thus further reducing the whistling and noise generated by the check valve during operation. The first limiting structure 134 cooperates with the second limiting structure to further improve the stability of the return spring 14 during extension and retraction.

[0062] Specifically, the second main body 121 includes a second seat body 1211 and a second connecting portion 1212. The second seat body 1211 is used to connect to the first main body 111. The second seat body 1211 is arranged around the second guide sleeve 122, and the second guide sleeve 122 is connected to the second seat body 1211 through the second connecting portion 1212. This design simplifies the structure of the second guide seat 12, facilitates processing, and reduces the material used in the second guide seat 12, thereby reducing processing costs.

[0063] In this embodiment, the end face of the second guide sleeve 122 facing the sealing portion 131 is higher than the end face of the second connecting portion 1212. The return spring 14 is partially sleeved on the second guide sleeve 122 and abuts against the second connecting portion 1212. That is to say, a portion of the second guide sleeve 122 forms the aforementioned second limiting structure. The structure is simple, and the second guide sleeve 122 can simultaneously guide the second guide rod portion 133 and limit the return spring 14, thereby improving processing efficiency and reducing processing costs.

[0064] In some embodiments, the number of second connecting portions 1212 is at least two, and each second connecting portion 1212 is spaced apart circumferentially along the second guide sleeve 122 to improve the connection strength between the second main body 121 and the second guide sleeve 122 and ensure the uniformity of force on the second main body 121 and the second guide sleeve 122 in the circumferential direction. For example, the number of second connecting portions 1212 is three, and the included angle between two adjacent second connecting portions 1212 is 120°, ensuring sufficient connection strength between the second main body 121 and the second guide sleeve 122 while ensuring sufficient flow area in the second communication port 120. Of course, in other embodiments, the number of second connecting portions 1212 can also be two, four, five, or even more.

[0065] like Figure 6 As shown, the inner wall of the second guide sleeve 122 is provided with a plurality of spaced second protrusions 1221, and the outer wall of the second guide rod portion 133 contacts and slides with the second protrusions 1221. This design can, on the one hand, reduce the material used in the second guide sleeve 122 to a certain extent, thereby reducing material costs; on the other hand, it can reduce the mating area between the second guide rod portion 133 and the hole wall of the second guide sleeve 122, reducing friction and wear, thereby improving the service life of the second guide seat 12 and the check valve core 13.

[0066] Figure 7 It shows Figure 2 A magnified view of a portion at point A. (See image below.) Figure 7 and combined Figure 2 , Figure 4 and Figure 6 As shown, the second guide seat 12 (specifically the second main body seat 121) is provided with an annular groove 1210, and the first guide seat 11 (specifically the first annular seat of the first main body seat 111) is provided with an embedding part 1110. The embedding part 1110 is embedded in the annular groove 1210, thereby realizing the fixed connection between the first guide seat 11 and the second guide seat 12. The connection method is simple and easy to assemble. Of course, in other embodiments, the annular groove 1210 can also be provided on the first guide seat 11, and the embedding part 1110 can be provided on the second guide seat 12, which can achieve the same effect.

[0067] In some embodiments, the width of the annular groove 1210 along the axial direction of the first guide seat 11 (which is also the axial direction of the second guide seat 12) is greater than the width of the insert portion 1110, so that after the first guide seat 11 and the second guide seat 12 are connected, the two have a certain position adjustment space along the axial direction of the first guide seat 11, so as to adapt to valve bodies 20 of different sizes.

[0068] like Figure 1As shown, the valve body 20 includes a valve body 21 and a valve cover 22. The valve cover 22 is connected to the valve body 21, and the two form a valve cavity 2001. By setting the valve body 20 as a separate valve body 21 and valve cover 22, the assembly between the valve core assembly 10 and the valve body 20 can be facilitated. That is, when assembling the valve core assembly 10 and the valve body 20, the valve core assembly 10 can be installed in the valve body 21 first, and then the valve cover 22 can be installed on the valve body 21.

[0069] In some embodiments, the valve cover 22 is threaded to the valve body 21, which is simple in structure, secure in connection, and easy to disassemble and assemble.

[0070] In some embodiments, a sealing ring is also provided between the valve body 21 and the valve cover 22 to ensure the sealing between the two and prevent the fluid in the valve cavity 2001 from leaking from the gap between the valve body 21 and the valve cover 22, thereby ensuring the safety of the check valve in use.

[0071] In some embodiments, a first limiting step 211 is formed on the inner wall of the valve body 21, and the first guide seat 11 is limited and abuts against the first limiting step 211. A second limiting step 221 is formed on the inner wall of the valve cover 22, and the second guide seat 12 is limited and abuts against the second limiting step 221, thereby achieving the limited installation of the valve core assembly 10 in the valve body 20. It can be understood that, through the cooperating annular groove 1210 and the embedding part 1110, the first guide seat 11 and the second guide seat 12 can be adaptively adjusted according to the distance between the first limiting step 211 and the second limiting step 221, and under the elastic force of the return spring 14, the first guide seat 11 is limited and abuts against the first limiting step 211, while the second guide seat 12 is limited and abuts against the second limiting step 221, so as to prevent the valve core assembly 10 from being displaced relative to the valve body 20 under the impact of the fluid.

[0072] like Figures 3-4 and combined Figure 1 As shown, at least a portion of the outer wall of the first guide seat 11 is inclined outward to abut against the cavity wall of the valve cavity 2001. This design ensures a stable connection between the valve core assembly 10 and the valve body 20, and reduces the connection structure between them, thereby reducing processing costs and improving assembly efficiency.

[0073] Specifically, the first guide seat 11 also includes a mounting ring 113, which is connected to the first seat body 1111 and surrounds the second ring seat. The outer peripheral wall of the mounting ring 113 gradually slopes outward in a direction away from the first seat body 1111. After the valve core assembly 10 is installed into the valve body 20, the mounting ring 113 can be press-fitted with the cavity wall of the valve cavity 2001, thereby achieving a stable connection between the valve core assembly 10 and the valve body 20 and ensuring the sealing between the valve core assembly 10 and the valve body 20. This prevents fluid in the pipeline from leaking through the gap between the valve core assembly 10 and the valve body 20, thus affecting the performance of the check valve.

[0074] In some embodiments, at least a portion of the outer wall of the second guide seat 12 is inclined outward to abut against the cavity wall of the valve cavity 2001. That is, the same effect can be achieved by connecting the mounting ring 113 to the second guide seat 12 (second seat body 1211).

[0075] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A valve core assembly, characterized in that, include: The first guide seat (11) includes a first main body seat (111) and a first guide sleeve (112) disposed on the first main body seat (111), and a first communication port (110) is formed between the first main body seat (111) and the first guide sleeve (112). The second guide seat (12) includes a second main body seat (121) and a second guide sleeve (122) disposed on the second main body seat (121), and a second communication port (120) is formed between the second main body seat (121) and the second guide sleeve (122); the first main body seat (111) and the second main body seat (121) are connected, and the internal space between the first main body seat (111) and the second main body seat (121) forms a check cavity (1001), and the two ends of the check cavity (1001) can be connected to the first communication port (110) and the second communication port (120) respectively. The check valve core (13) includes a plugging part (131), a first guide rod part (132), and a second guide rod part (133). The first guide rod part (132) and the second guide rod part (133) are respectively connected to the two ends of the plugging part (131). The first guide rod part (132) is movably inserted into the first guide sleeve (112), and the second guide rod part (133) is movably inserted into the second guide sleeve (122). The check valve core (13) can move axially along the check cavity (1001) so that the plugging part (131) blocks or opens the first communication port (110).

2. The valve core assembly according to claim 1, characterized in that, The valve core assembly also includes a return spring (14), which is sleeved on the second guide rod portion (133), and the two ends of the return spring (14) abut against the sealing portion (131) and the second guide seat (12) respectively.

3. The valve core assembly according to claim 2, characterized in that, The sealing part (131) is provided with a first limiting structure (134) at one end facing the second guide seat (12), and one end of the reset spring (14) is sleeved outside the first limiting structure (134); And / or, the second guide seat (12) is provided with a second limiting structure at one end facing the sealing part (131), and the other end of the reset spring (14) is sleeved outside the second limiting structure.

4. The valve core assembly according to claim 1, characterized in that, One of the first main body (111) and the second main body (121) has an annular groove (1210) on its outer periphery, and the other has an embedding part (1110) on its inner wall, the embedding part (1110) being embedded in the annular groove (1210).

5. The valve core assembly according to claim 4, characterized in that, Along the axial direction of the first main body (111), the width of the annular groove (1210) is greater than the width of the insert (1110).

6. The valve core assembly according to claim 1, characterized in that, The inner wall of the first guide sleeve (112) is provided with a plurality of spaced first protrusions (1121), and the outer wall of the first guide rod (132) contacts and slides with the first protrusions (1121); And / or, the inner wall of the second guide sleeve (122) is provided with a plurality of spaced second protrusions (1221), and the outer wall of the second guide rod portion (133) contacts and slides with the second protrusions (1221).

7. The valve core assembly according to any one of claims 1 to 6, characterized in that, The first main body (111) includes: The first seat (1111) has a stepped hole that extends through it along its axial direction. A stepped surface (11113) is formed between the small hole section (11111) and the large hole section (11112) of the stepped hole. The sealing part (131) cooperates with the stepped surface (11113) to seal the first communication port (110). The first seat (1111) is used to connect the second main body seat (121). The first connecting part (1112) is connected to the small hole segment (11111) through the first connecting part (1112).

8. The valve core assembly according to any one of claims 1 to 6, characterized in that, The second main body (121) includes a second seat body (1211) and a second connecting part (1212). The second seat body (1211) is used to connect the first main body (111). The second seat body (1211) is arranged around the second guide sleeve (122), and the second guide sleeve (122) is connected to the second seat body (1211) through the second connecting part (1212).

9. A check valve, characterized in that, include: Valve body (20) has valve cavity (2001); The valve core assembly as described in any one of claims 1 to 8, wherein the valve core assembly is installed in the valve cavity (2001), and the first communication port (110) of the valve core assembly is connected to the inlet of the valve cavity (2001).

10. The check valve according to claim 9, characterized in that, At least a portion of the outer wall of the first guide seat (11) of the valve core assembly is inclined outward to abut against the cavity wall of the valve cavity (2001); And / or, at least a portion of the outer wall of the second guide seat (12) of the valve core assembly is inclined outward to abut against the cavity wall of the valve cavity (2001).

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