A new check valve structure

Abstract

The utility model relates to check valve technical field especially is a new check valve structure, including check valve body, be provided with the piston in check valve body, the lateral surface fixedly connected with the locating point of piston, the outer surface of locating point has the joint of sealing washer, sealing washer and check valve body abut, the outer surface of piston is set up spring positioning step, the outer surface of piston is provided with spring, through the cooperation of check valve body, measuring valve cover, spring, spring presser bar and spring guide bush, the size of flow channel is consistent, guarantees system pressure drop, can bear higher pressure, sealing washer service life, effectively reduce leakage, reduce maintenance cost, the cooperation gap of precision between piston and sealing washer is designed, can guarantee sealing performance, can reduce friction, prolong service life, spring can provide stable recovery force under different pressure, ensure the reliable work of check valve, the setting of spring presser bar and spring guide bush, further strengthened the stability and durability of spring.

Description

Technical Field

[0001] This utility model relates to the field of check valve technology, specifically a novel check valve structure. Background Technology

[0002] A check valve is a valve that automatically opens and closes its disc based on the flow of the medium itself to prevent backflow of the medium. It is also known as a non-return valve, one-way valve, backflow valve, and back pressure valve. Check valves are a type of automatic valve, and their main functions are to prevent backflow of the medium, prevent pumps and drive motors from reversing, and prevent the release of medium from containers.

[0003] Existing technologies, such as CN218818359U, provide a structurally stable check valve. By using the frictional force generated by the rotation of the deceleration arc wall relative to the friction block, the speed of the valve disc during rotation tends to slow down, reducing the impact force of the valve disc on the valve seat or the inner wall of the valve body. This indirectly protects the valve disc, valve seat, and valve body, thus giving the valve disc, valve seat, and valve body good structural stability.

[0004] However, this check valve still has some shortcomings in its use:

[0005] Wear on the sealing surface can easily lead to leakage, resulting in high maintenance costs. Inappropriate flow channel design can cause local turbulence and increase system pressure drop.

[0006] It cannot withstand high pressure; under high pressure, its check valve function will be compromised. Existing improvement solutions address this by modifying the sealing method and sealing materials. Utility Model Content

[0007] The purpose of this invention is to provide a novel check valve structure to address the issues raised in the background art, such as leakage due to wear of the sealing surface, high maintenance costs, unreasonable flow channel design leading to local turbulence, increased system pressure drop, inability to withstand high pressures, and loss of backflow prevention effect under high pressure. Existing improvements address these issues by modifying the sealing method and sealing materials.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A novel check valve structure includes a check valve body, a piston disposed within the check valve body, a positioning point fixedly connected to the side of the piston, a sealing ring snapped onto the outer surface of the positioning point, the sealing ring abutting against the check valve body, a spring positioning step formed on the outer surface of the piston, a spring disposed on the outer surface of the piston, the end of the spring abutting against the spring positioning step, a valve side cover disposed on the side of the check valve body, an internal thread formed on the inner surface wall of the valve side cover, an external thread formed on the side of the check valve body, the valve side cover extending to the side of the check valve body, and the internal thread and the external thread being threadedly connected.

[0010] As a preferred embodiment of this utility model, a pressure cover step is provided on the side of the check valve body, a spring pressure cover is provided in the pressure cover step, the spring pressure cover abuts against the end of the spring, a flow guiding slope is provided in the valve side cover, a pressure cover positioning hole is provided at the center of the side of the spring pressure cover, and an outer arc is provided at the end of the spring pressure cover.

[0011] As a preferred embodiment of this utility model, a spring guide sleeve is provided inside the spring, the side of the spring guide sleeve extends into the positioning hole of the pressure cap, and an overflow port is provided on the side of the spring guide sleeve.

[0012] As a preferred embodiment of this utility model, a first welding bevel is provided at the side edge of the check valve body, and a second welding bevel is provided at the side edge of the valve side cover.

[0013] As a preferred embodiment of this utility model, the ends of the check valve body and the valve side cover are respectively fixedly connected with mounting pipes, and both mounting pipes are made of copper.

[0014] As a preferred embodiment of this utility model, the check valve body, the valve side cover, and the two mounting pipes are connected, and the check valve body and the valve side cover are connected to form a specific high-pressure resistant sealing body.

[0015] As a preferred embodiment of this utility model, the end of the spring guide sleeve is provided with a tapered slope, and the overflow port is located at the center of the side of the tapered slope.

[0016] As a preferred embodiment of this utility model, the spring is made of stainless steel and the sealing ring is made of polytetrafluoroethylene.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. In this utility model, the check valve body, test valve cover, piston, sealing ring, spring, spring rod, and spring guide sleeve are used in combination to ensure that the flow channel size is consistent, guaranteeing the system pressure drop and enabling it to withstand higher pressures. The sealing ring has a longer service life, effectively reducing leakage and lowering maintenance costs. The piston and sealing ring are designed with a precise fit clearance, which can ensure sealing performance, reduce friction, and extend service life. The spring can provide stable restoring force under different pressures, ensuring the reliable operation of the check valve. The spring rod and spring guide sleeve further enhance the stability and durability of the spring.

[0019] 2. In this utility model, by setting up a check valve body, valve side cover, internal thread, external thread, first welding bevel and second welding bevel in cooperation, the overall structure of the valve is optimized, the strength and sealing performance of the valve are enhanced, the valve side cover and check valve body are connected to facilitate the inspection and maintenance of the internal parts of the check valve, the design of internal and external threads allows the check valve to be easily connected to other pipeline components, improving the convenience and efficiency of installation, and the setting of the first welding bevel and second welding bevel ensures the quality and strength of the welding, further improving the reliability and sealing performance of the check valve. Attached Figure Description

[0020] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the check valve body structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the valve side cover structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the piston structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the spring guide sleeve structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the spring cap structure of this utility model;

[0026] Figure 7 This is a schematic diagram of the overall exploded structure of this utility model.

[0027] In the diagram: 1. Check valve body; 2. Valve side cover; 3. Piston; 4. Sealing ring; 5. Spring; 6. Spring guide sleeve; 7. Spring gland; 8. Mounting tube; 9. External thread; 10. First welding bevel; 11. Gland step; 12. Second welding bevel; 13. Internal thread; 14. Guide slope; 15. Spring positioning step; 16. Positioning point; 17. Conical slope; 18. Overflow port; 19. Outer arc; 20. Gland positioning hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] For examples, please refer to Figures 1-7 This utility model provides a technical solution:

[0030] A novel check valve structure includes a check valve body 1, a piston 3 disposed inside the check valve body 1, a positioning point 16 fixedly connected to the side of the piston 3, a sealing ring 4 snapped onto the outer surface of the positioning point 16, the sealing ring 4 abutting against the check valve body 1, a spring positioning step 15 formed on the outer surface of the piston 3, a spring 5 disposed on the outer surface of the piston 3, the end of the spring 5 abutting against the spring positioning step 15, a valve side cover 2 disposed on the side of the check valve body 1, an internal thread 13 formed on the inner surface wall of the valve side cover 2, an external thread 9 formed on the side of the check valve body 1, the valve side cover 2 extending to the side of the check valve body 1, the internal thread 13 and the external thread 9 being threadedly connected, and mounting tubes 8 fixedly connected to the ends of the check valve body 1 and the valve side cover 2 respectively, both mounting tubes 8 being made of copper.

[0031] In this process, the spring 5 releases energy to push the piston 3 backward, closing the fluid passage and effectively preventing fluid backflow. During this process, the sealing ring 4 plays a crucial sealing role, ensuring that the fluid does not leak.

[0032] In this embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a pressure plate step 11 is provided on the side of the check valve body 1, and a spring pressure plate 7 is provided inside the pressure plate step 11. The spring pressure plate 7 abuts against the end of the spring 5. A flow guiding slope 14 is provided inside the valve side cover 2. A pressure plate positioning hole 20 is provided at the center of the side of the spring pressure plate 7. An outer arc 19 is provided at the end of the spring pressure plate 7. A spring guide sleeve 6 is provided inside the spring 5. The side of the spring guide sleeve 6 extends into the pressure plate positioning hole 20. An overflow port 18 is provided on the side of the spring guide sleeve 6. The end of the spring pressure plate 7 is... The valve body 1 has an outer arc 19, a first welding bevel 10 on the side edge of the check valve body 1, and a second welding bevel 12 on the side edge of the valve side cover 2. The check valve body 1, the valve side cover 2 and the two mounting pipes 8 are connected. After the check valve body 1 and the valve side cover 2 are connected, they form a specific high-pressure resistant sealing body. The end of the spring guide sleeve 6 has a tapered slope 17, and the overflow port 18 is located at the center of the side of the tapered slope 17. The spring 5 is made of stainless steel, and the sealing ring 4 is made of polytetrafluoroethylene.

[0033] The beveling is performed by the first welding bevel 10 and the second welding bevel 12 to complete the assembly of the check valve body 1 and the valve side cover 2, forming a specific high-pressure resistant sealing body.

[0034] The working process of this utility model is as follows: When using the novel check valve structure designed in this scheme, first check whether the structure is working properly, ensuring that all components are intact and correctly installed. The check valve body 1 is a rotating body with a cavity, the size of which is determined according to the size of the installation pipe 8 to be connected.

[0035] The spring cap step 11 on the check valve body 1 has a depth determined by the thickness of the spring cap 7 and an inner diameter determined by the outer diameter of the spring cap 7. It forms a sealing structure with the sealing ring 4. The external thread 9 and the internal thread 13 are assembled. After assembly, the beveling is completed by the first welding bevel 10 and the second welding bevel 12, thus completing the assembly of the check valve body 1 and the valve side cover 2, forming a specific high-pressure resistant sealing body. When the fluid starts to flow, it pushes the piston 3 forward. At this time, the spring 5 is compressed. Due to the forward movement of the piston 3, the fluid passage in the check valve body 1 is opened, allowing the fluid to pass smoothly. When the fluid stops flowing or flows in reverse, the spring 5 releases energy, pushing the piston 3 backward to close the fluid passage and effectively prevent the fluid from flowing back. In this process, the sealing ring 4 plays a key sealing role to ensure that the fluid does not leak. In addition, the guide slope 14 and the conical slope 17 in this design help to reduce the resistance of fluid flow and improve fluid efficiency.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel check valve structure, comprising a check valve body (1), characterized in that: A piston (3) is provided inside the check valve body (1). A positioning point (16) is fixedly connected to the side of the piston (3). A sealing ring (4) is snapped onto the outer surface of the positioning point (16). The sealing ring (4) abuts against the check valve body (1). A spring positioning step (15) is provided on the outer surface of the piston (3). A spring (5) is provided on the outer surface of the piston (3). The end of the spring (5) abuts against the spring positioning step (15). A valve side cover (2) is provided on the side of the check valve body (1). An internal thread (13) is provided on the inner surface wall of the valve side cover (2). An external thread (9) is provided on the side of the check valve body (1). The valve side cover (2) extends to the side of the check valve body (1). The internal thread (13) and the external thread (9) are threadedly connected.

2. The novel check valve structure according to claim 1, characterized in that, The check valve body (1) has a pressure plate step (11) on its side, and a spring pressure plate (7) is provided in the pressure plate step (11). The spring pressure plate (7) abuts against the end of the spring (5). The valve side cover (2) has a flow guiding slope (14). The center of the side of the spring pressure plate (7) has a pressure plate positioning hole (20). The end of the spring pressure plate (7) has an outer arc (19).

3. The novel check valve structure according to claim 1, characterized in that, A spring guide sleeve (6) is provided inside the spring (5), and the side of the spring guide sleeve (6) extends into the pressure cap positioning hole (20). An overflow port (18) is provided on the side of the spring guide sleeve (6).

4. The novel check valve structure according to claim 1, characterized in that, The check valve body (1) has a first welding bevel (10) at its side edge, and the valve side cover (2) has a second welding bevel (12) at its side edge.

5. The novel check valve structure according to claim 1, characterized in that, The check valve body (1) and valve side cover (2) are respectively fixedly connected to the ends of the mounting tubes (8), and both mounting tubes (8) are made of copper.

6. The novel check valve structure according to claim 5, characterized in that, The check valve body (1), valve side cover (2) and two mounting pipes (8) are connected. After the check valve body (1) and valve side cover (2) are connected, they form a specific high-pressure resistant sealing body.

7. The novel check valve structure according to claim 3, characterized in that, The end of the spring guide sleeve (6) is provided with a tapered inclined surface (17), and the overflow port (18) is located at the center of the side of the tapered inclined surface (17).

8. The novel check valve structure according to claim 1, characterized in that, The spring (5) is made of stainless steel, and the sealing ring (4) is made of polytetrafluoroethylene.

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