A zero-leak self-latching gas check valve

Abstract

This utility model relates to the field of gas check valve technology, and discloses a zero-leakage self-locking gas check valve, including a valve body. An inlet pipe is threadedly connected to the left side of the inner wall of the valve body. An inclined pipe is threaded through and fixedly connected to the bottom of the inlet pipe. A filter screen is slidably connected to the inner wall of the inclined pipe. Limit plates are slidably connected to the top and bottom of one end of the filter screen. A sealing cap is fixedly connected to one end of the limit plate. The sealing cap is threadedly connected to one end of the inner wall of the inclined pipe. A sealing element is fixedly connected to the top of the inner wall of the inlet pipe, and the bottom of the sealing element is in contact with the filter screen. In this utility model, the filtered gas pushes open the sealing plug, the sealing plug presses the spring and drives the sliding rod to move to the right, allowing the gas to be discharged from the outlet pipe. After the transportation work is completed, the spring force can push the sealing plug back to its original position, thus sealing the ring, achieving zero leakage and self-locking, and ensuring the sealing performance of the device.

Description

Technical Field

[0001] This utility model relates to the field of gas check valve technology, specifically a zero-leakage self-locking gas check valve. Background Technology

[0002] A gas check valve is a device used in pipelines to prevent gas backflow. Its core function is to automatically open the valve disc under gas pressure, allowing gas to flow in one direction; when the gas flow reverses, it blocks the backflow. This prevents gas backflow from causing equipment damage, media contamination, or process disruptions in the system.

[0003] Zero-leakage self-locking gas check valve is a device that enhances the sealing and self-locking functions of a regular check valve. Its function is to ensure zero-leakage sealing during unidirectional gas flow, preventing reverse gas flow infiltration; simultaneously, in the event of system pressure fluctuations or shutdown, the self-locking mechanism maintains the valve disc in a tightly closed state, preventing gas backflow and equipment failure.

[0004] Existing zero-leakage self-locking gas check valves still have the following problems: it is inconvenient to filter the gas; if there are impurities in the gas, it may damage the valve body or downstream equipment; and the valve body and other equipment usually need to be inspected frequently, which increases maintenance costs. In order to address the above problems, a zero-leakage self-locking gas check valve is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a zero-leakage self-locking gas check valve, which solves the problem of inconvenient gas filtration in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a zero-leakage self-locking gas check valve, comprising a valve body, an inlet pipe threadedly connected to the left side of the inner wall of the valve body, an inclined pipe through and fixedly connected to the bottom of the inlet pipe, a filter screen slidably connected to the inner wall of the inclined pipe, a limit plate slidably connected to the top and bottom of one end of the filter screen, a sealing cap fixedly connected to one end of the limit plate, the sealing cap being threadedly connected to one end of the inner wall of the inclined pipe, a sealing element fixedly connected to the top of the inner wall of the inlet pipe, the bottom of the sealing element contacting the filter screen, and a connecting assembly provided in the middle of the inner wall of the valve body.

[0007] By adopting the above technical solution, the filter screen can filter out solid impurities in the gas. After the filter screen has been working for a long time, it needs to be cleaned. By opening the sealing cover, the filter screen can be removed and cleaned, so that the filter screen can be reused and the impact of dust and impurities on subsequent equipment can be avoided.

[0008] As a further description of the above technical solution: the connecting assembly includes a connecting plate, the front and rear ends of the connecting plate are fixedly connected to the valve body, a slide rod is slidably connected through the middle of the connecting plate, a sealing ring is fixedly connected to the left side of the middle of the inner wall of the valve body, a sealing plug is fixedly connected to the left side of the slide rod, the sealing plug is slidably connected to the inner wall of the sealing ring, and a spring is fixedly connected between the sealing plug and the connecting plate.

[0009] By adopting the above technical solution, the filtered gas pushes open the sealing plug, the sealing plug presses the spring and drives the slide rod to move to the right, and the gas can be discharged from the discharge pipe. After the transportation work is completed, the sealing plug can be pushed back to its original position by the elastic force of the spring, which can block the sealing ring, achieve zero leakage and self-locking, and ensure the sealing performance of the device.

[0010] As a further description of the above technical solution: guide rods are fixedly connected to the top and bottom of the right side of the sealing plug, and the guide rods are slidably connected to the connecting plate through it.

[0011] By adopting the above technical solution, the guide rod allows the sealing plug to slide stably.

[0012] As a further description of the above technical solution: a first flange is fixedly connected to the left side of the outer wall of the inlet pipe.

[0013] By adopting the above technical solution, the first flange allows the inlet pipe to be connected to other equipment.

[0014] As a further description of the above technical solution: a handle is fixedly connected to the top of the outer wall of the valve body.

[0015] By adopting the above technical solution, the handle makes it easy to lift the valve body.

[0016] As a further description of the above technical solution: a pipe is threadedly connected to the right side of the inner wall of the valve body, and a second flange is fixedly connected to the right side of the outer wall of the pipe.

[0017] By adopting the above technical solution, the gas is discharged from the valve body through the pipe, and other equipment is connected through the second flange.

[0018] As a further description of the above technical solution: a top ring is fixedly connected to the right side of the middle of the inner wall of the valve body, and the right side of the top ring is in contact with the pipe.

[0019] By adopting the above technical solution, the installation position of the pipe arrangement is restricted by the top ring.

[0020] As a further description of the above technical solution: a limiting groove is provided at the top and bottom of one end of the filter screen, and the inner wall of the limiting groove is slidably connected to the limiting plate.

[0021] By adopting the above technical solution, the limiting groove is used to install the limiting plate.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] This utility model provides a zero-leakage self-locking gas check valve. The filter screen can filter out solid impurities in the gas. After the filter screen has been working for a long time, it needs to be cleaned. By opening the sealing cover, the filter screen can be removed and cleaned, so that the filter screen can be reused and the impact of dust and impurities on downstream equipment is avoided.

[0024] This utility model provides a zero-leakage self-locking gas check valve. After the filtered gas pushes open the sealing plug, the sealing plug presses the spring and drives the slide rod to move to the right, and the gas can be discharged from the discharge pipe. After the transportation work is completed, the sealing plug can be pushed back to its original position by the elastic force of the spring, which can block the sealing ring, complete the zero leakage and self-locking, and ensure the sealing performance of the device. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model;

[0026] Figure 2 This is an exploded view of the valve body of this utility model;

[0027] Figure 3 This is a cross-sectional view of the valve body of this utility model;

[0028] Figure 4 This is a schematic diagram of the filter screen of this utility model;

[0029] Figure 5 This is an exploded view of the filter screen of this utility model.

[0030] In the diagram: 1. First flange; 2. Inlet pipe; 3. Inclined pipe; 4. Valve body; 5. Pipeline; 6. Second flange; 7. Handle; 8. Sealing plug; 9. Slide rod; 10. Spring; 11. Connecting plate; 12. Top ring; 13. Guide rod; 14. Sealing ring; 15. Filter screen; 16. Sealing cover; 17. Seal; 18. Limiting plate; 19. Limiting groove. Detailed Implementation

[0031] 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.

[0032] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0033] Combination Figures 1-3 This utility model discloses a zero-leakage self-locking gas check valve, comprising a valve body 4, an inlet pipe 2 threadedly connected to the left side of the inner wall of the valve body 4, through which gas enters the valve body 4, a first flange 1 fixedly connected to the left side of the outer wall of the inlet pipe 2, through which the inlet pipe 2 connects to other equipment, a handle 7 fixedly connected to the top of the outer wall of the valve body 4, through which the valve body 4 is easily lifted, a drain pipe 5 threadedly connected to the right side of the inner wall of the valve body 4, a second flange 6 fixedly connected to the right side of the outer wall of the drain pipe 5, through which gas exits the valve body 4, and through the second flange 6 connects to other equipment, a top ring 12 fixedly connected to the right side of the middle of the inner wall of the valve body 4, the right side of the top ring 12 contacting the drain pipe 5, the top ring 12 restricting the installation position of the drain pipe 5, and a limit groove 19 is provided at the top and bottom of one end of the filter screen 15, the inner wall of the limit groove 19 slidingly connected to the limit plate 18, through which the limit plate 18 is installed.

[0034] Combination Figure 4 An inclined tube 3 is fixedly connected to the bottom of the inlet pipe 2. A filter screen 15 is slidably connected to the inner wall of the inclined tube 3. The filter screen 15 filters dust and impurities in the gas. A limit plate 18 is slidably connected to the top and bottom of one end of the filter screen 15. A sealing cover 16 is fixedly connected to one end of the limit plate 18. The filter screen 15 and the sealing cover 16 are connected by the limit plate 18. The sealing cover 16 is threaded to one end of the inner wall of the inclined tube 3. The sealing cover 16 seals the inclined tube 3. A sealing element 17 is fixedly connected to the top of the inner wall of the inlet pipe 2. The bottom of the sealing element 17 is in contact with the filter screen 15. The sealing element 17 seals the top of the filter screen 15, preventing the gas from escaping the filter screen 15.

[0035] Combination Figures 2-3 A connecting assembly is provided in the middle of the inner wall of the valve body 4. The connecting assembly includes a connecting plate 11. The front and rear ends of the connecting plate 11 are fixedly connected to the valve body 4. The connecting plate 11 is installed through the valve body 4. A slide rod 9 is slidably connected through the middle of the connecting plate 11. A sealing ring 14 is fixedly connected to the left side of the middle of the inner wall of the valve body 4. The sealing ring 14 is installed through the valve body 4. A sealing plug 8 is fixedly connected to the left side of the slide rod 9. The sealing plug 8 is slidably connected to the inner wall of the sealing ring 14. The sealing plug 8 and the sealing ring 14 cooperate with each other to ensure zero leakage and self-locking. A spring 10 is fixedly connected between the sealing plug 8 and the connecting plate 11. The spring 10 can press the sealing plug 8 tightly so that the sealing plug 8 can fit against the sealing ring 14. Guide rods 13 are fixedly connected to the top and bottom of the right side of the sealing plug 8. The guide rods 13 are slidably connected through the connecting plate 11. The guide rods 13 allow the sealing plug 8 to slide stably.

[0036] Working principle: Connect the first flange 1 and the second flange 6 to other related equipment. Then, the pressurized gas will pass through the filter screen 15, which can filter out solid impurities in the gas. After the filter screen 15 has been working for a long time, it needs to be inspected or cleaned. Open the sealing cover 16, and then the filter screen 15 can be removed by the cooperation of the limiting plate 18 and the limiting groove 19. The filter screen 15 can be cleaned, so that the filter screen 15 can be reused, avoiding the impact of dust and impurities on subsequent equipment. The filtered gas pushes open the sealing plug 8. The sealing plug 8 presses the spring 10 and drives the slide rod 9 to move to the right, so that the gas can be discharged smoothly from the discharge pipe 5. When the transportation work is finished, under the elastic force of the spring 10, the sealing plug 8 can be pushed back to its original position, which can block the sealing ring 14, achieving zero leakage and self-locking, ensuring the sealing of the device.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] 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 zero-leak self-latching gas check valve comprising a valve body (4) characterised in that: The valve body (4) has an inlet pipe (2) threadedly connected to the left side of its inner wall. The bottom of the inlet pipe (2) is connected to an inclined pipe (3) that passes through and is fixedly connected to it. The inner wall of the inclined pipe (3) is slidably connected to a filter screen (15). The top and bottom of one end of the filter screen (15) are slidably connected to a limiting plate (18). One end of the limiting plate (18) is fixedly connected to a sealing cap (16). The sealing cap (16) is threadedly connected to one end of the inner wall of the inclined pipe (3). The top of the inner wall of the inlet pipe (2) is fixedly connected to a sealing element (17). The bottom of the sealing element (17) is in contact with the filter screen (15). A connecting component is provided in the middle of the inner wall of the valve body (4).

2. A zero-leak self-latching gas check valve according to claim 1, wherein: The connecting assembly includes a connecting plate (11), the front and rear ends of which are fixedly connected to the valve body (4). A slide rod (9) is slidably connected through the middle of the connecting plate (11). A sealing ring (14) is fixedly connected to the left side of the middle of the inner wall of the valve body (4). A sealing plug (8) is fixedly connected to the left side of the slide rod (9). The sealing plug (8) is slidably connected to the inner wall of the sealing ring (14). A spring (10) is fixedly connected between the sealing plug (8) and the connecting plate (11).

3. A zero-leak self-latching gas check valve according to claim 2, wherein: The top and bottom right sides of the sealing plug (8) are fixedly connected with guide rods (13), and the guide rods (13) are connected to the connecting plate (11) through and slidingly.

4. A zero-leak, self-latching gas check valve according to claim 1, wherein: The first flange (1) is fixedly connected to the left side of the outer wall of the inlet pipe (2).

5. A zero-leak, self-latching gas check valve according to claim 1, wherein: A handle (7) is fixedly connected to the top of the outer wall of the valve body (4).

6. A zero-leak, self-latching gas check valve according to claim 1, wherein: The valve body (4) has a threaded connection to the right side of the inner wall of the valve body (4), and a second flange (6) is fixedly connected to the right side of the outer wall of the valve body (5).

7. A zero-leakage self-latching gas check valve according to claim 1, wherein: A top ring (12) is fixedly connected to the right side of the middle of the inner wall of the valve body (4), and the right side of the top ring (12) is in contact with the drain pipe (5).

8. A zero-leak, self-latching gas check valve according to claim 1, wherein: The filter screen (15) has a limiting groove (19) at the top and bottom of one end, and the inner wall of the limiting groove (19) is slidably connected to the limiting plate (18).

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