Check valve assembly

Abstract

The utility model discloses a check valve assembly which comprises flanges, a front valve body and a rear valve body are respectively arranged between the flanges, an air inlet is arranged inside the flange on one side of the front valve body, an air outlet is arranged inside the flange on one side of the rear valve body, air valve assemblies are arranged inside the front valve body and the rear valve body, and the air valve assemblies are arranged in the front valve body and the rear valve body. A movable valve element is arranged on one side of the air valve assembly, a connecting spring is installed in the movable valve element, an annular support is arranged in the air inlet, a cleaning scraper is arranged on the inner wall of a flange at the position of the annular support, and a filter screen plate is arranged in the annular support. A positioning column is fixed to the center of the surface of the filter screen plate, the positioning column is sleeved with a positioning cap, and a cleaning scraper is fixed to one side of the positioning cap. According to the utility model, the filter screen is convenient to clean, and the efficiency is improved.

Description

Technical Field

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

[0002] A check valve is a type of valve whose opening and closing element is a circular valve disc that relies on its own weight and the pressure of the medium to prevent backflow of the medium. It belongs to the category of automatic valves and is also known as a non-return valve, one-way valve, backflow valve, or isolation valve. The main function of a check valve in a gas pipeline is to prevent gas backflow, ensure that the gas flows in a predetermined direction, and avoid equipment failure or pipeline pressure fluctuations caused by backflow.

[0003] Because impurities in the gas in the pipeline can cause blockages in the internal flow channels of the check valve, jamming of the valve components, poor sealing, and wear, the current measure is to add a filter screen at the air inlet to filter impurities in the gas. However, after filtering for a long time, impurities will accumulate on the surface of the filter screen, causing the mesh to become clogged and affecting the filtration effect. However, the filter screen is relatively troublesome to disassemble, making cleaning inconvenient. Therefore, improvements are urgently needed. Utility Model Content

[0004] The purpose of this invention is to provide a check valve assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a check valve assembly, including flanges, with a front valve body and a rear valve body respectively disposed between the flanges. An air inlet is disposed inside the flange on one side of the front valve body, and an exhaust port is disposed inside the flange on one side of the rear valve body. A valve assembly is disposed inside the front and rear valve bodies. The valve assembly has equally spaced first gas channels inside. A movable valve core is disposed on one side of the valve assembly, and a connecting spring is installed inside the movable valve core. One end of the connecting spring is fixedly connected to the valve assembly. A second gas channel with equal spacing is disposed inside the movable valve core. An annular support is disposed inside the air inlet. A cleaning scraper is disposed on the inner wall of the flange at the position of the annular support. A filter screen is disposed inside the annular support. A positioning post is fixed at the center of the surface of the filter screen, and a positioning cap is fitted onto the outside of the positioning post. A cleaning scraper is fixed to one side of the positioning cap.

[0006] Preferably, a spiral wound gasket is provided between the flange and the front valve body and the rear valve body.

[0007] Preferably, the top of the flange is connected by fully threaded bolts, and both ends of the fully threaded bolts are threaded with nuts.

[0008] Preferably, the bottom ends of the front valve body and the rear valve body are provided with locking gaskets, and the locking gaskets are connected to the front valve body and the rear valve body by locking bolts.

[0009] Preferably, four sets of limiting edges are provided on the inner wall of the annular bracket on one side of the filter screen, and the filter screen is fixed to the limiting edges by bolts.

[0010] Preferably, the inner wall of the positioning cap is provided with equally spaced positioning grooves, and the outer wall of the positioning post is provided with equally spaced positioning protrusions, the positioning protrusions being tightly engaged with the positioning grooves.

[0011] Preferably, a sealing gasket is provided at the connection between the air valve assembly and the front valve body and the rear valve body, and the sealing gasket is made of expanded graphite.

[0012] Preferably, the second gas channel has the same number as the first gas channel and is staggered in distribution.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The filter screen filters the gas. Periodically, open the valve body, pinch the positioning cap, and rotate the cleaning scraper to scrape along the filter screen to remove the dirt accumulated on its surface. Then remove the positioning cap from the positioning post to remove the cleaning scraper, making it easier to clean the dirt. After cleaning, put the positioning cap back on the positioning post so that the positioning protrusion engages with the positioning groove, thus installing the positioning cap on the positioning post. This design makes the filter screen easy to clean and improves cleaning efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is an enlarged structural schematic diagram of the air valve assembly of this utility model;

[0017] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0018] Figure 4 This is a front view structural diagram of the filter screen of this utility model;

[0019] Figure 5 This is a rear-view magnified structural diagram of the positioning cap of this utility model.

[0020] In the diagram: 1. Flange; 101. Inlet; 102. Exhaust port; 2. Nut; 3. Fully threaded bolt; 4. Spiral wound gasket; 5. Front valve body; 6. Sealing gasket; 7. Valve assembly; 8. Rear valve body; 9. Locking gasket; 10. Locking bolt; 11. First gas passage; 12. Movable valve core; 13. Connecting spring; 14. Second gas passage; 15. Annular bracket; 16. Limiting stop; 17. Filter screen; 18. Positioning post; 19. Positioning protrusion; 20. Positioning cap; 21. Positioning groove; 22. Cleaning scraper. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 scope of protection of the present utility model.

[0023] Please see Figure 1-5 An embodiment of this utility model provides: a check valve assembly, including a flange 1, a front valve body 5 and a rear valve body 8 respectively disposed between the flanges 1, an air inlet 101 is disposed inside the flange 1 on one side of the front valve body 5, an exhaust port 102 is disposed inside the flange 1 on one side of the rear valve body 8, a valve assembly 7 is disposed inside the front valve body 5 and the rear valve body 8, a first gas channel 11 with equal spacing is disposed inside the valve assembly 7, a movable valve core 12 is disposed on one side of the valve assembly 7, and a connecting spring 13 is installed inside the movable valve core 12, one end of the connecting spring 13 is fixedly connected to the valve assembly 7, and a second gas channel 14 with equal spacing is disposed inside the movable valve core 12;

[0024] Specifically, gas enters from the inlet 101, passes through the front valve body 5 and the rear valve body 8, and then exits from the outlet 102. When the gas passes through the first gas channel 11 inside the valve assembly 7, the resulting thrust causes the movable valve core 12 to overcome the elasticity of the connecting spring 13 and separate from the valve assembly 7, allowing the gas to pass through the gap between the valve assembly 7 and the movable valve core 12 and through the second gas channel 14. Because the first gas channel 11 and the second gas channel 14 are misaligned, the gas can only flow from the inlet 101 to the outlet 102 and cannot flow in the opposite direction, thus avoiding equipment failure or pipeline pressure fluctuations caused by backflow.

[0025] When gas passes through the inlet 101, the filter screen 17 inside the annular support 15 filters the gas, and the adsorption of activated carbon filters out impurities in the gas, reducing the damage of impurities to the valve body.

[0026] An annular bracket 15 is provided inside the air inlet 101. A cleaning scraper 22 is provided on the inner wall of the flange 1 at the position of the annular bracket 15. A filter screen 17 is provided inside the annular bracket 15. A positioning post 18 is fixed at the center of the surface of the filter screen 17. A positioning cap 20 is fitted on the outside of the positioning post 18. A cleaning scraper 22 is fixed on one side of the positioning cap 20.

[0027] Specifically, the filter screen 17 filters the gas. Periodically, the valve body is opened, the positioning cap 20 is pinched and the cleaning scraper 22 is rotated to scrape along the filter screen 17 to remove the dirt accumulated on its surface. Then, the positioning cap 20 is removed from the positioning post 18, and the cleaning scraper 22 can be removed, which makes it easier to clean the dirt. After cleaning, the positioning cap 20 is put on the positioning post 18 so that the positioning protrusion 19 engages with the positioning groove 21, and the positioning cap 20 can be installed on the positioning post 18. This design makes the filter screen 17 easy to clean and improves cleaning efficiency.

[0028] A spiral wound gasket 4 is provided between flange 1 and the front valve body 5 and the rear valve body 8;

[0029] The top of flange 1 is connected by fully threaded bolts 3, and both ends of the fully threaded bolts 3 are threaded with nuts 2;

[0030] Locking gaskets 9 are provided at the bottom of the front valve body 5 and the rear valve body 8, and the locking gaskets 9 are connected to the front valve body 5 and the rear valve body 8 by locking bolts 10.

[0031] Four sets of limiting edges 16 are provided on the inner wall of the annular bracket 15 on one side of the filter screen plate 17, and the filter screen plate 17 is fixed to the limiting edges 16 by bolts.

[0032] The inner wall of the positioning cap 20 is provided with equally spaced positioning grooves 21, and the outer wall of the positioning post 18 is provided with equally spaced positioning protrusions 19, which are tightly engaged with the positioning grooves 21.

[0033] A sealing gasket 6 is provided at the connection between the air valve assembly 7 and the front valve body 5 and the rear valve body 8, and the sealing gasket 6 is made of expanded graphite.

[0034] The second gas channel 14 is the same number as the first gas channel 11 and is staggered.

[0035] In this embodiment, the gas first enters through the inlet 101, passes through the front valve body 5 and the rear valve body 8, and then exits through the outlet 102. When the gas passes through the inlet 101, the filter screen 17 inside the annular bracket 15 filters the gas, and the adsorption of activated carbon filters out impurities in the gas, reducing the damage of impurities to the valve body. Then, when the gas passes through the first gas channel 11 inside the valve assembly 7, the resulting thrust causes the movable valve core 12 to overcome the elasticity of the connecting spring 13 and separate from the valve assembly 7, allowing the gas to pass through the gap between the valve assembly 7 and the movable valve core 12 and through the second gas channel 14. Due to the misalignment of the first gas channel 11 and the second gas channel 14... This design ensures that gas can only flow from the inlet 101 to the outlet 102, preventing reverse flow and avoiding equipment malfunctions or pipeline pressure fluctuations caused by backflow. The filter screen 17 filters the gas. Periodically, open the valve body, pinch the positioning cap 20, and rotate the cleaning scraper 22 to scrape off the dirt accumulated on the surface of the filter screen 17. Then, remove the positioning cap 20 from the positioning post 18 to remove the cleaning scraper 22, making it easier to clean the dirt. After cleaning, put the positioning cap 20 back on the positioning post 18 so that the positioning protrusion 19 engages with the positioning groove 21, thus installing the positioning cap 20 on the positioning post 18. This design makes the filter screen 17 easy to clean and improves cleaning efficiency.

[0036] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A check valve assembly, comprising flanges (1), wherein a front valve body (5) and a rear valve body (8) are respectively disposed between the flanges (1), an air inlet (101) is disposed inside the flange (1) on one side of the front valve body (5), and an exhaust port (102) is disposed inside the flange (1) on one side of the rear valve body (8), characterized in that, The front valve body (5) and the rear valve body (8) are provided with a valve assembly (7). The valve assembly (7) is provided with a first gas channel (11) with equal spacing. A movable valve core (12) is provided on one side of the valve assembly (7). A connecting spring (13) is installed inside the movable valve core (12). One end of the connecting spring (13) is fixedly connected to the valve assembly (7). A second gas channel (14) with equal spacing is provided inside the movable valve core (12). An annular bracket (15) is provided inside the air inlet (101). A cleaning scraper (22) is provided on the inner wall of the flange (1) at the position of the annular bracket (15). A filter screen plate (17) is provided inside the annular bracket (15). A positioning post (18) is fixed at the center of the surface of the filter screen plate (17). A positioning cap (20) is fitted on the outside of the positioning post (18). A cleaning scraper (22) is fixed on one side of the positioning cap (20).

2. A check valve assembly according to claim 1, characterized in that: A spiral wound gasket (4) is provided between the flange (1) and the front valve body (5) and the rear valve body (8).

3. A check valve assembly according to claim 1, characterized in that: The top of the flange (1) is connected by a fully threaded bolt (3), and both ends of the fully threaded bolt (3) are threaded with nuts (2).

4. A check valve assembly according to claim 1, characterized in that: The bottom ends of the front valve body (5) and the rear valve body (8) are provided with locking gaskets (9), and the locking gaskets (9) are connected to the front valve body (5) and the rear valve body (8) by locking bolts (10).

5. A check valve assembly according to claim 1, characterized in that: Four sets of limiting edges (16) are provided on the inner wall of the annular bracket (15) on one side of the filter screen (17), and the filter screen (17) is fixed to the limiting edges (16) by bolts.

6. A check valve assembly according to claim 1, characterized in that: The inner wall of the positioning cap (20) is provided with equally spaced positioning grooves (21), and the outer wall of the positioning post (18) is provided with equally spaced positioning protrusions (19), which are tightly engaged with the positioning grooves (21).

7. A check valve assembly according to claim 1, characterized in that: A sealing gasket (6) is provided at the connection between the air valve assembly (7) and the front valve body (5) and the rear valve body (8), and the sealing gasket (6) is made of expanded graphite.

8. A check valve assembly according to claim 1, characterized in that: The second gas channel (14) has the same number as the first gas channel (11) and is staggered.

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