A check valve

Abstract

This application relates to the field of check valve technology, and in particular to a check valve comprising: a mounting seat having a positioning hole and a water flow hole, the water flow hole penetrating two parallel sidewalls of the mounting seat for water flow; and a one-way sealing assembly including a seal, a positioning post, and a spring. The seal is integrally stretched to form a positioning groove. One end of the positioning post passes through the positioning hole and is detachably connected to the positioning groove. The spring is sleeved around the periphery of the positioning post and abuts against one end of the positioning post, while the other end of the spring presses against an adjacent sidewall of the mounting seat, tending to drive the positioning post to press the seal against the water flow hole. This application improves the machining sealing performance between the seal and the mounting seat.

Description

Technical Field

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

[0002] In the field of fluid transportation, check valves are key components in pipelines that prevent fluid from flowing backwards, and they are widely used in pipeline operations such as water supply and drainage.

[0003] In related technologies, a check valve includes a mounting seat and a one-way sealing assembly. The one-way sealing assembly includes a seal, a positioning pin, and a spring. Both the mounting seat and the seal have through holes for one end of the positioning pin to pass through. During installation, the seal and the spring are located on opposite sides of the mounting seat. The spring slides around the positioning pin, with one end of the spring limiting the position and the other end of the spring elastically pressing against the adjacent side wall of the mounting seat. The other end of the positioning pin passes through the through hole and is welded to the seal. The mounting seat has a water flow hole. When water flows through the through hole and acts on the seal, the spring contracts, creating a gap between the seal and the water flow hole. When the water pressure decreases, the spring returns to its elasticity, sealing the seal and the water flow hole, thus achieving one-way water flow.

[0004] Regarding the aforementioned technologies, during the mass production of check valves, welding between the positioning pin and the sealing element increases processing time. Furthermore, welding leaks that occur during the welding process between the sealing element and the positioning pin can affect the overall sealing performance of the sealing element. Utility Model Content

[0005] To improve the machining seal between the seal and the mounting seat, this application provides a check valve.

[0006] The check valve provided in this application adopts the following technical solution: A check valve, comprising: The valve seat is equipped with a positioning hole and a water flow hole. The water flow hole penetrates the two parallel side walls of the valve seat to allow water to flow through. A one-way sealing assembly includes a seal, a positioning post, and a spring. The seal is integrally stretched to form a positioning groove. One end of the positioning post passes through the positioning hole and is detachably connected to the positioning groove. The spring is sleeved around the periphery of the positioning post and abuts against one end of the positioning post. The other end of the spring is pressed against the adjacent side wall of the mounting valve seat, and has the tendency to drive the positioning post to press the seal tightly to seal the water flow hole.

[0007] By adopting the above technical solution, the sealing component is detachably threadedly connected by opening a positioning groove and positioning post, so that when the seal is connected and fixed with the positioning component, it is no longer fixed by welding. Under the elastic force of the spring, the seal can effectively seal the water flow hole, and it is not easy to have the sealing effect caused by the weld seam that is difficult to completely avoid during the welding process.

[0008] Optionally, the spring is trapezoidal in shape and has a limiting end and a pressing end. The diameter of the limiting end gradually increases towards the pressing end, and the pressing end abuts against the mounting valve seat.

[0009] By adopting the above technical solution, the spring is provided with a limiting end and a pressing end, and forms a trapezoidal shape with a gradually increasing outer diameter. This allows the pressing end to abut against the surface of the mounting valve seat over a larger range, increasing the probability that the spring will not bend along its circumference and improving the uniformity of the tension force applied by the spring to the positioning pin.

[0010] Optionally, the positioning post is provided with a limiting part and a threaded connection part. The threaded connection part is detachably threaded to the positioning groove by opening an external thread. The circumferential diameter of the limiting part is larger than the outer diameter of the limiting end of the spring.

[0011] By adopting the above technical solution, the setting of the limiting part and the threaded connection part enables the positioning pin to be accurately fixed in the positioning groove through the threaded connection part. At the same time, the limiting part can effectively limit the end of the spring and maintain the tension on the seal, so that the seal can firmly seal the water flow hole without the need to conduct water flow.

[0012] Optionally, the limiting part has a cross-shaped groove on its side wall facing away from the threaded connection part.

[0013] By adopting the above technical solution, the cross-shaped countersunk grooves are all designed so that when the positioning pin is detachably threaded into the positioning groove, it can be disassembled and assembled using a quick-release screwdriver, so as to facilitate the tightening of the positioning pin.

[0014] Optionally, the sealing element includes a sealing plate and a sealing ring. The sealing ring is disposed on the side of the sealing plate facing the mounting valve seat. The sealing ring is disposed opposite to the water flow hole. The positioning groove is disposed on the surface of the sealing plate and is recessed and stretched toward the side away from the sealing ring.

[0015] By adopting the above technical solution, the sealing plate and the sealing ring work together to further improve the basic sealing performance of the sealing plate. When in contact with water flow, the sealing ring can adapt to the tension change of the water flow force, thereby improving the sealing effect at the edge of the sealing plate and helping to keep the sealing performance of the water flow hole within a good range.

[0016] Optionally, multiple water flow holes are provided and are evenly arranged circumferentially along the axis of the mounting valve seat.

[0017] By adopting the above technical solution, compared with a single water flow hole, multiple and evenly distributed water flow holes increase the water flow rate and are less likely to cause uneven water flow force. This makes the force acting on the valve seat evenly distributed, less likely to form unilateral force, and less likely to cause stress fatigue.

[0018] Optionally, the mounting valve seat is provided with a partition mesh, which is evenly distributed within the water flow hole to form a filter mesh.

[0019] By adopting the above technical solution, the setting of the separator mesh, together with the water flow holes, forms multiple small filter mesh holes, thereby filtering out large-volume impurities in the water flow. At the same time, it increases the structural strength of the valve seat, making the thin sheet structure formed by the multiple water flow holes less prone to deformation, which helps to increase service life and durability.

[0020] Optionally, a fastening sealing ring is fitted on the outer peripheral wall of the mounting valve seat, and the fastening sealing ring is made of rubber.

[0021] By adopting the above technical solution, the setting of the fastening sealing ring provides protection to the outer wall of the valve seat, while improving the sealing performance of the outer wall of the valve seat and reducing the probability of water seepage from the outer edge.

[0022] Optionally, the mounting valve seat has a flow guide groove, and the flow guide groove has a guide slope. The guide slope is inclined toward the water flow hole to guide the buffered water flow toward the water flow hole.

[0023] By adopting the above technical solution, the guide channel uses the guiding slope to gather the water flow and introduce it into the water flow hole, so that the water flow can easily form a large pressure, thus making it suitable for some application scenarios where the water flow pressure in the pipeline is relatively small, and improving the applicability of the check valve.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The sealing assembly is detachably threaded through the opening of positioning grooves and positioning pins, so that when the seal is connected and fixed with the positioning part, it is no longer fixed by welding. Under the action of spring force, the seal can effectively seal the water flow hole, and is not easily affected by the weld seam that is difficult to completely avoid during the welding process. 2. By setting a limiting end and a pressing end, and forming a trapezoidal shape with a gradually increasing outer diameter, the spring can abut against the surface of the mounting valve seat over a larger range, increasing the probability that the spring will not bend along its circumference and improving the uniformity of the tension force applied by the spring to the positioning pin. 3. The partition mesh, in conjunction with the water flow holes, forms multiple fine filter holes, which effectively filter large impurities in the water flow. At the same time, it increases the structural strength of the valve seat, making the thin sheet structure formed by the multiple water flow holes less prone to deformation, thus helping to increase service life and durability. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the check valve in this application.

[0026] Figure 2 This is an exploded view of the valve seat and one-way sealing assembly installed in this application.

[0027] Figure 3 This is an exploded view of the valve seat and the fastening sealing ring installed in this application.

[0028] Figure 4 This is an exploded view of the overall structure of the check valve in this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Mounting valve seat; 11. Water flow hole; 12. Positioning hole; 13. Guide groove; 131. Guide slope; 14. Separator mesh; 2. One-way sealing assembly; 21. Seal; 211. Sealing plate; 212. Sealing ring; 213. Positioning groove; 22. Positioning pin; 221. Limiting part; 222. Threaded connection part; 223. Cross countersunk groove; 23. Spring; 231. Limiting end; 232. Pressing end; 3. Fastening sealing ring. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] This application discloses a check valve. (Refer to...) Figure 1 and Figure 2The check valve includes a mounting seat 1 and a one-way sealing assembly 2. The mounting seat 1 has a water flow hole 11 and a positioning hole 12. The one-way sealing assembly 2 includes a seal 21, a positioning pin 22, and a spring 23. The seal 21 is integrally stretched to form a positioning groove 213. One end of the positioning pin 22 passes through the positioning hole 12 and is detachably connected to the positioning groove 213. The spring 23 is sleeved on the periphery of the positioning pin 22 and abuts against one end of the positioning pin 22. The other end of the spring 23 is pressed against the adjacent side wall of the mounting seat 1, tending to drive the positioning pin 22 to press the seal 21 to seal the water flow hole 11. This eliminates the need for welding to fix the positioning pin 22 and the seal 21, reducing the impact of welding leaks on the sealing performance.

[0032] Reference Figure 2 A flow guide groove 13 is provided on the side of the valve seat 1 facing the spring 23. A guide slope 131 is provided on the inner wall of the flow guide groove 13, gradually tilting towards the center of the valve seat 1. This allows water to accumulate in the flow guide groove 13 and flow towards the center of the valve seat 1. A water flow hole 11 is located at the bottom of the flow guide groove 13 and penetrates two parallel sidewalls of the valve seat 1. It should be noted that a positioning hole 12 is located at the bottom of the flow guide groove 13 and is coaxial with the valve seat 1. In this embodiment, three water flow holes 11 are provided, evenly arranged circumferentially along the axis of the positioning hole 12.

[0033] Reference Figure 2 In order to further increase the structural strength of the mounting valve seat 1 and filter out larger foreign objects in the water flow, the mounting valve seat 1 is also provided with a partition mesh 14. The number of partition meshes 14 corresponds to the water flow holes 11. The partition meshes 14 are integrally injection molded with the mounting valve seat 1, so that filter mesh holes are formed in the water flow holes 11 to filter out relatively large foreign objects.

[0034] Reference Figure 3 The outer wall of the mounting valve seat 1 is also fitted with a fastening sealing ring 3. When the fastening sealing ring 3 is installed, it wraps around the side wall of the mounting valve seat 1. The fastening sealing ring 3 is made of rubber and has a certain elastic deformation, so that when the mounting valve seat 1 is assembled with the pipeline, it can fit against the inner wall of the pipeline, thereby improving the sealing performance.

[0035] Reference Figure 2 and Figure 4The sealing element 21 includes a sealing plate 211 and a sealing ring 212. Both the sealing plate 211 and the sealing ring 212 are circular, and the diameter of the sealing plate 211 is larger than the diameter of the sealing ring 212. During installation, a corresponding through hole is made on the sealing ring 212 so that one end of the positioning post 22 can pass through and be detachably connected and fixed to the sealing plate 211. It should be noted that the positioning groove 213 is formed on the sealing plate 211 by stretching or punching to form a groove, and then tapping to form a threaded groove, so as to form a detachable connection with the positioning post 22 through threaded connection.

[0036] In addition, the positioning post 22 includes a limiting part 221 and a threaded connection part 222. The threaded connection part 222 is located at the end near the sealing plate 211. The threaded connection part 222 is machined with an external thread to cooperate with the positioning groove 213. The limiting part 221 is located at the other end of the positioning post 22 away from the threaded connection part 222. It is arranged in a circular plate shape. A cross countersunk groove 223 is opened on the side wall facing away from the threaded connection part 222 for quick control of the electric Phillips screwdriver to facilitate disassembly and installation.

[0037] In this embodiment, the spring 23 is trapezoidal in shape and has a limiting end 231 and a pressing end 232. The outer diameter of the spring 23 increases from the limiting end 231 toward the pressing end 232, so that the pressing end 232 can be effectively pressed against the surface of the valve seat 1, reducing the probability of the spring 23 shifting during contraction and protecting the spring 23.

[0038] The implementation principle of a check valve in this application embodiment is as follows: a corresponding positioning groove 213 is formed by forming a sealing plate 211, so that the positioning groove 213 and the threaded connection part 222 at the end of the positioning column 22 are detachably threadedly connected. Compared with the method of connecting the positioning column 22 and the sealing plate 211 by welding process and overall stretching and forming, the sealing plate 211 substrate will not be damaged, and the sealing performance caused by weld problems can be effectively reduced, which helps to improve the one-way flow guidance effect of the check valve.

[0039] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A check valve, characterized in that, include: The valve seat (1) is provided with a positioning hole (12) and a water flow hole (11). The water flow hole (11) penetrates the two parallel side walls of the valve seat (1) to allow water to flow through. The one-way sealing assembly (2) includes a seal (21), a positioning post (22) and a spring (23). The seal (21) is integrally stretched to form a positioning groove (213). One end of the positioning post (22) passes through the positioning hole (12) and is detachably connected to the positioning groove (213). The spring (23) is sleeved on the periphery of the positioning post (22) and abuts against one end of the positioning post (22). The other end of the spring (23) is pressed against the adjacent side wall of the mounting valve seat (1), and has the tendency to drive the positioning post (22) to press the seal (21) to seal the water flow hole (11).

2. A check valve according to claim 1, characterized in that: The spring (23) is trapezoidal in shape and has a limiting end (231) and a pressing end (232). The diameter of the limiting end (231) gradually increases towards the pressing end (232), and the pressing end (232) abuts against the mounting valve seat (1).

3. A check valve according to claim 2, characterized in that: The positioning post (22) is provided with a limiting part (221) and a threaded connection part (222). The threaded connection part (222) is detachably threaded to the positioning groove (213) by opening an external thread. The circumferential diameter of the limiting part (221) is larger than the outer diameter of the limiting end (231) of the spring (23).

4. A check valve according to claim 3, characterized in that: The limiting part (221) has a cross groove (223) on its side wall opposite to the threaded connection part (222).

5. A check valve according to claim 1, characterized in that: The sealing element (21) includes a sealing plate (211) and a sealing ring (212). The sealing ring (212) is disposed on the side of the sealing plate (211) facing the mounting valve seat (1). The sealing ring (212) is disposed opposite to the water flow hole (11). The positioning groove (213) is disposed on the surface of the sealing plate (211) and is recessed and stretched toward the side away from the sealing ring (212).

6. A check valve according to claim 1, characterized in that: Multiple water flow holes (11) are provided and are evenly arranged circumferentially along the axis of the mounting valve seat (1).

7. A check valve according to claim 6, characterized in that: The mounting valve seat (1) is provided with a partition mesh (14), which is evenly distributed in the water flow hole (11) to form a filter mesh.

8. A check valve according to claim 1, characterized in that: The outer periphery of the mounting valve seat (1) is fitted with a fastening sealing ring (3), which is made of rubber.

9. A check valve according to claim 1, characterized in that, The mounting valve seat (1) has a guide groove (13), and the guide groove (13) has a guide slope (131). The guide slope (131) is inclined toward the water flow hole (11) to guide the buffer water flow toward the water flow hole (11).

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