Check valve with good leakproofness
Through the design of the annular boss and the sealing ring, combined with the return spring, the sealing performance of the check valve is enhanced, the problem of air leakage in the traditional check valve is solved, and the effective isolation of the airflow and the stable operation of the system are achieved.
Patent Information
- Application Number
- CN202423278086.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-30
AI Technical Summary
The sealing performance of traditional check valves in airflow control is unstable, resulting in air leakage, which affects the operational stability and safety of the pipeline system.
The annular boss is matched with a sealing ring to enhance the sealing performance, and the annular groove increases the contact area between the return gas and the valve cover, accelerating the reset, and the reset spring is used to realize the automatic closing of the valve cover.
The airtightness of the check valve is improved, ensuring that the airflow does not flow back, and improving the operational stability and safety of the pipeline system.
Smart Images
Figure CN223483513U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of check valve technology, specifically to a check valve with good sealing performance. Background Technology
[0002] A check valve (also known as a one-way valve) is a safety device used in piping systems. Its main function is to prevent backflow of media. It automatically controls the opening and closing of the valve by utilizing the direction of fluid flow. When the media flows in the normal direction, the valve opens, allowing the fluid to pass through. When the media flows in the reverse direction, the valve automatically closes to prevent backflow. Check valves are widely used in water treatment, water supply, fire protection, air conditioning, HVAC, and petrochemical industries to effectively protect equipment safety and prevent system damage or pollution.
[0003] In traditional airflow control devices, the sealing fit between the valve cover and the air inlet is often unstable, resulting in air leakage in the airflow channel. This is especially true when the sealing ring ages or the valve cover does not open and close precisely enough. As a result, the airflow cannot be completely blocked, and the stability and safety of the entire pipeline system operation process will also be affected. Utility Model Content
[0004] This utility model aims to solve at least one of the technical problems existing in the prior art.
[0005] Therefore, one objective of this utility model is to provide a check valve with good sealing performance. This check valve with good sealing performance utilizes an annular boss combined with a sealing ring to enhance the sealing performance when it is tightly fitted with an annular baffle. The annular groove increases the contact area between the backflow gas and the valve cover, accelerates the reset, and improves the check valve effect.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a check valve with good sealing performance, comprising a valve body, wherein the valve body is provided with an air inlet and an air outlet, the valve body is provided with a valve cover and a valve stem inside, the valve stem passing through the valve cover and the valve body in sequence, an annular baffle is fixedly connected to the inner wall of the valve body, an annular boss is provided on the outer wall of the valve cover, a sealing ring is fixedly connected to one side of the annular boss, the sealing ring is in contact with the annular baffle, an annular groove is provided on one side of the valve cover, and a return spring is sleeved on the outer wall of the valve stem, with one end of the return spring abutting against one side of the valve cover.
[0007] Preferably, the cross-section of the annular groove is a right trapezoid.
[0008] Preferably, a windbreak groove is formed between the annular baffle and the inner wall of the valve body, and the cross-section of the windbreak groove is wedge-shaped.
[0009] Preferably, an annular block is fixedly connected inside the valve body, one end of the valve stem passes through the annular block, and the end of the return spring away from the valve cover is located inside the annular block.
[0010] Preferably, the inner walls of both the air inlet and the air outlet are provided with threaded grooves.
[0011] Preferably, the return spring is conical.
[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses a valve stem that passes through the valve cover and valve body. When the airflow passes normally, the valve cover is pushed open by the airflow. When the airflow stops, the return spring pushes the valve cover back. The annular boss combined with the sealing ring can enhance the sealing performance when it is tightly fitted with the annular baffle. The annular groove increases the contact area between the backflow gas and the valve cover, accelerates the reset, and improves the anti-reverse effect. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of a check valve with good sealing performance according to an embodiment of the present utility model;
[0014] Figure 2 This is a schematic diagram of the valve cover, valve stem, and return spring in a check valve with good sealing performance according to an embodiment of this utility model.
[0015] Figure 3 This is an embodiment of the present utility model. Figure 1 A magnified structural diagram of part A in the middle.
[0016] In the diagram: 1. Valve body; 2. Air inlet; 3. Air outlet; 4. Valve stem; 5. Valve cover; 6. Annular baffle; 7. Annular groove; 8. Return spring; 9. Annular block; 10. Threaded groove; 11. Windproof groove; 12. Annular boss; 13. Sealing ring. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figure 1 The present invention provides a check valve with good sealing performance, comprising: valve body 1.
[0019] Among them, such as Figure 1-Figure 2As shown, the valve body 1 is provided with an air inlet 2 and an air outlet 3. The valve body 1 is provided with a valve cover 5 and a valve stem 4 inside. The valve stem 4 passes through the valve cover 5 and the valve body 1 in sequence. An annular baffle 6 is fixedly connected to the inner wall of the valve body 1. An annular boss 12 is provided on the outer wall of the valve cover 5. In use, the air inlet 2 and the air outlet 3 allow airflow to enter and exit the valve body 1. The valve stem 4 passes through the valve cover 5 and the valve body 1 and works with the annular baffle 6 and the sealing ring 13 to achieve the anti-backflow function. When the airflow is flowing normally, the valve cover 5 is opened by the airflow. When the airflow stops, the return spring 8 pushes the valve cover 5 back.
[0020] Furthermore, a windbreak groove 11 is formed between the annular baffle 6 and the inner wall of the valve body 1, and the cross-section of the windbreak groove 11 is wedge-shaped. When the valve cover 5 closes the air inlet 2, the backflowing gas is blocked from entering the windbreak groove 11 and is turned back to the air outlet 3.
[0021] In this embodiment, as Figure 1-Figure 3 As shown, a sealing ring 13 is fixedly connected to one side of the annular boss 12. The sealing ring 13 fits against the annular baffle 6. An annular groove 7 is provided on one side of the valve cover 5. A return spring 8 is sleeved on the outer wall of the valve stem 4, and one end of the return spring 8 abuts against one side of the valve cover 5. The cross section of the annular groove 7 is a right trapezoid, and the return spring 8 is conical.
[0022] When in use, when the airflow stops, the return spring 8 pushes the valve cover 5 back, and the sealing ring 13 fits tightly with the annular baffle 6, cutting off the airflow channel and preventing backflow. The annular boss 12 enhances the sealing between the valve cover 5 and the sealing ring 13, ensuring the backflow prevention effect. The annular groove 7 increases the contact area between the backflow gas and one side of the valve cover 5, accelerating the reset of the valve cover 5 and further enhancing the backflow prevention effect.
[0023] like Figure 1 As shown, an annular block 9 is fixedly connected inside the valve body 1. One end of the valve stem 4 passes through the annular block 9, and the end of the return spring 8 away from the valve cover 5 is located inside the annular block 9. The annular block 9 can limit one end of the return spring 8 to prevent the one end of the return spring 8 from deviating.
[0024] Specifically, the inner walls of both the air inlet 2 and the air outlet 3 are provided with threaded grooves 10, and both the air inlet 2 and the air outlet 3 can be connected to the external pipe through the threaded grooves 10.
[0025] Based on the above technical solution, the working steps of this solution are summarized as follows: When this utility model is used, the air inlet 2 and the air outlet 3 allow airflow to enter and exit the valve body 1. The valve stem 4 passes through the valve cover 5 and the valve body 1, and works with the annular baffle 6 and the sealing ring 13 to achieve the anti-backflow function. When the airflow is flowing normally, the valve cover 5 is opened by the airflow. When the airflow stops, the return spring 8 pushes the valve cover 5 back. The sealing ring 13 fits tightly with the annular baffle 6, cutting off the airflow channel and thus preventing the airflow from flowing back.
[0026] Among them, the annular boss 12 enhances the sealing performance between the valve cover 5 and the sealing ring 13, ensuring the backflow prevention effect, and the annular groove 7 can increase the contact area between the backflow gas and one side of the valve cover 5, accelerate the reset of the valve cover 5, and further enhance the backflow prevention effect.
[0027] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model 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 this utility model, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A check valve with good sealing performance, comprising a valve body (1), wherein the valve body (1) is provided with an air inlet (2) and an air outlet (3), and the valve body (1) is provided with a valve cover (5) and a valve stem (4) inside, characterized in that: The valve stem (4) passes through the valve cover (5) and the valve body (1) in sequence. An annular baffle (6) is fixedly connected to the inner wall of the valve body (1). An annular boss (12) is provided on the outer wall of the valve cover (5). A sealing ring (13) is fixedly connected to one side of the annular boss (12). The sealing ring (13) fits against the annular baffle (6). An annular groove (7) is provided on one side of the valve cover (5). A return spring (8) is sleeved on the outer wall of the valve stem (4), and one end of the return spring (8) abuts against one side of the valve cover (5).
2. The check valve with good sealing performance according to claim 1, characterized in that: The cross-section of the annular groove (7) is a right trapezoid.
3. The check valve with good sealing performance according to claim 1, characterized in that: A windbreak groove (11) is formed between the annular baffle (6) and the inner wall of the valve body (1), and the cross section of the windbreak groove (11) is wedge-shaped.
4. The check valve with good sealing performance according to claim 1, characterized in that: An annular block (9) is fixedly connected inside the valve body (1), one end of the valve stem (4) passes through the annular block (9), and the end of the return spring (8) away from the valve cover (5) is located inside the annular block (9).
5. A check valve with good sealing performance according to claim 1, characterized in that: The inner walls of the air inlet (2) and the air outlet (3) are provided with threaded grooves (10).
6. A check valve with good sealing performance according to claim 1, characterized in that: The reset spring (8) is conical.