An automatic switching valve

Abstract

The application relates to the field of valves and discloses an automatic switching valve which comprises a frame body, a switching assembly arranged on the frame body, a plurality of connecting pipes connected to the switching assembly, and a pressure reducing valve and a diaphragm valve arranged on the connecting pipes; the switching assembly comprises a switching seat fixed to the frame body, a plurality of sliding cavities communicated with each other are arranged in the switching seat, the plurality of sliding cavities are arranged in one-to-one correspondence with the plurality of connecting pipes, and the corresponding sliding cavities and the connecting pipes are communicated; a plurality of communicating cavities communicated with the plurality of sliding cavities are arranged on the switching seat; an exhaust pipe communicated with the plurality of communicating cavities is arranged on the switching seat; a sliding block is slidably connected in the sliding cavity; the sliding block is used for controlling the opening and closing of the communicating cavity; the high-pressure gas injected into the connecting pipe pushes the sliding block away from the connecting pipe and opens the communicating cavity; and the sliding block simultaneously pushes the remaining sliding blocks to move close to the connecting pipe and closes the communicating cavity. The application has the effect that the gas in the gas tank can be continuously outputted, and the convenience of using the gas tank is improved.

Description

Technical Field

[0001] This application relates to the field of valves, and more particularly to an automatic switching valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the transported medium. Installing valves on gas tanks allows for more convenient control over the tank's operation and the pressure of the gas it delivers.

[0003] In related technologies, a gas cylinder valve includes a valve body installed on a gas cylinder, a diaphragm valve is provided on the valve body, and a pressure reducing valve is connected to the end of the diaphragm valve away from the valve body, thereby controlling the gas pressure output from the gas cylinder.

[0004] Regarding the aforementioned technologies, the valve body is installed on the gas tank, and the gas tank can be used better by controlling the diaphragm valve and the pressure reducing valve. However, with this design, when the gas in the gas tank is used up, the gas tank needs to be replaced. At this time, the gas tank cannot be used normally, which will cause the gas delivery to be interrupted, which is not conducive to the continuous use of the gas tank and reduces the convenience of using the gas tank. It is urgent to improve. Summary of the Invention

[0005] In order to enable the continuous output of gas from the gas cylinder and improve the convenience of using the gas cylinder, this application provides an automatic switching valve.

[0006] The automatic switching valve provided in this application adopts the following technical solution: An automatic switching valve includes a frame, on which a switching component is mounted, and a plurality of connecting pipes are connected to the switching component. A pressure reducing valve and a diaphragm valve are mounted on the connecting pipes, and the end of the connecting pipe away from the switching component is connected to a gas tank. The switching assembly includes a switching base fixed to the frame. The switching base has several interconnected sliding cavities. Each of the sliding cavities corresponds to a number of connecting pipes, and the corresponding sliding cavities are connected to the connecting pipes. The switching base has several communicating cavities that communicate with the sliding cavities. The switching base is provided with an exhaust pipe that communicates with the communicating cavities. A sliding block is slidably connected in each sliding cavity. The sliding block is used to control the opening and closing of the communicating cavity. High-pressure gas injected into the connecting pipe pushes the sliding block away from the connecting pipe and opens the communicating cavity. At the same time, the sliding block pushes the remaining sliding blocks to move closer to the connecting pipe and closes the communicating cavity.

[0007] By adopting the above technical solution, during use, several gas cylinders are connected to several connecting pipes respectively. The operator controls the gas pressure injected into the sliding chamber by controlling the pressure reducing valve, thereby controlling one of the sliding blocks to move away from the corresponding connecting pipe, thus opening the connecting chamber and allowing the gas cylinder to stably discharge gas through the exhaust pipe. At the same time, the sliding block pushes the remaining sliding blocks to move closer to the corresponding connecting pipe, thereby closing the connecting chamber and allowing a single gas cylinder to supply gas, improving the stability of the gas supply. When the gas in the gas cylinder is used up, the pressure inside the gas cylinder decreases, which can push the sliding block to move, allowing another gas cylinder to more smoothly deliver gas through the exhaust pipe. This design allows multiple gas cylinders to be connected simultaneously and used sequentially, thereby allowing the exhaust pipe to continuously deliver gas and improving the stability of gas delivery.

[0008] Optionally, the sliding block has a limiting inclined surface on the side near the connecting pipe, the sliding cavity has a limiting ring on the side near the connecting pipe that abuts against the limiting inclined surface, and the sliding block has an abutting surface on the side near the connecting pipe.

[0009] By adopting the above technical solution, the gas enters the sliding cavity and acts directly on the contact surface. When the sliding block opens, the air pressure acts on the limiting inclined surface, which can greatly increase the force-bearing area of ​​the sliding block, thereby increasing the pressure on the sliding block and improving the stability of the sliding block after it opens.

[0010] Optionally, a limiting cavity is formed within the communicating cavity, and a closing slider for closing the communicating cavity is slidably connected within the limiting cavity. An elastic element for driving the closing slider to close the communicating cavity is provided within the limiting cavity.

[0011] By adopting the above technical solution, when the sliding block is closed, the elastic element drives the closing slider to close the sliding cavity. When the sliding block is opened, the gas pressure drives the closing slider to move closer to the limiting cavity, so that the gas can flow normally. This design can limit the pressure of the gas in the sliding cavity, prevent the pressure in the sliding cavity from decreasing suddenly, affect the stability of the sliding block, and improve the stability of gas delivery.

[0012] Optionally, the inner wall of the sliding cavity is provided with a first sealing ring, which abuts against the outer wall of the sliding block.

[0013] By adopting the above technical solution, the use of the first sealing ring can reduce leakage caused by the gap between the sliding block and the inner wall of the sliding cavity, reduce the occurrence of communication between the two sliding cavities, and improve the sealing performance of the valve.

[0014] Optionally, a flow cavity is formed between several of the sliding blocks, and a pressure relief hole communicating with the flow cavity is provided on the switching seat. A first connecting hole communicating with the flow cavity is provided on the side of the sliding block away from the connecting pipe, and a second connecting hole communicating with the first connecting hole is provided on the side wall of the sliding block. When the sliding block is away from the connecting pipe, the opening of the second connecting hole is located on the side of the first sealing ring away from the connecting pipe. When the sliding block is close to the connecting pipe, the second connecting hole is connected with the communicating cavity.

[0015] By adopting the above technical solution, when the sliding block moves away from the connecting pipe to allow gas to flow, it closes the second connecting hole, thereby enabling the gas to be delivered more stably; when the remaining sliding block moves closer to the connecting pipe, the second connecting hole connects with the connecting cavity, thereby depressurizing the connecting cavity, allowing the closing slider to automatically reset, thus achieving the purpose of closing the connecting cavity, reducing gas flow in the switching seat, and improving the convenience of using the valve.

[0016] Optionally, a pressure relief valve is connected to the connecting pipe, which is used to release air from the connecting pipe.

[0017] By adopting the above technical solution, the pressure relief valve can discharge air from the connecting pipe during the gas supply process, thereby improving the purity of the transported gas and the convenience of using the valve.

[0018] Optionally, two sliding blocks are provided, and the two sliding blocks abut against each other, with the sidewalls of the two sliding cavities smoothly transitioning.

[0019] By adopting the above technical solution, two sliding blocks can be used to control the connection and switching seat of two gas tanks. This design allows the two sliders to slide more smoothly, improving the convenience of using the sliding blocks.

[0020] Optionally, three sliding blocks are provided, and a connecting rod is rotatably connected between two adjacent sliding blocks. The connecting rod includes a first connecting slide rod rotatably connected to the two sliding blocks. One of the first connecting slide rods has a telescopic hole, and an adjacent first connecting slide rod is provided with a telescopic rod that is inserted into the telescopic hole.

[0021] By adopting the above technical solution, two first connecting slide rods abut against each other, so that the sliding block can be moved to push the other two slide blocks to close the sliding cavity, thereby improving the convenience of using the slide block.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. In use, several gas cylinders are connected to several connecting pipes. The operator controls the gas pressure injected into the sliding chamber by controlling the pressure reducing valve, thereby controlling one of the sliding blocks to move away from the corresponding connecting pipe, thus opening the connecting chamber and allowing the gas cylinder to stably discharge gas through the exhaust pipe. At the same time, the sliding block pushes the remaining sliding blocks to move closer to the corresponding connecting pipe, thereby closing the connecting chamber and allowing a single gas cylinder to supply gas, improving the stability of the gas supply. When the gas in the gas cylinder is used up, the sliding block can automatically close, and other gas cylinders can then supply gas. This design allows multiple gas cylinders to be connected simultaneously and used sequentially, thus enabling the exhaust pipe to continuously deliver gas and improving the stability of gas delivery. 2. The gas enters the sliding cavity and acts directly on the contact surface. When the sliding block opens, the gas pressure acts on the limiting inclined surface, which can greatly increase the force-bearing area of ​​the sliding block, thereby increasing the pressure on the sliding block and making it easier to close and open the sliding block. 3. When the sliding block is closed, the elastic element drives the closing slider to close the sliding cavity. When the sliding block is opened, the gas pressure drives the closing slider to move closer to the limiting cavity, so that the gas can flow normally. This design can limit the pressure of the gas in the sliding cavity, prevent the pressure in the sliding cavity from decreasing suddenly, affect the stability of the sliding block, and improve the stability of gas delivery. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an automatic switching valve according to Embodiment 1 of this application.

[0024] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle.

[0025] Figure 3 This is a partial structural schematic diagram of an automatic switching valve according to Embodiment 2 of this application.

[0026] Reference numerals: 1. Connecting pipe; 2. Switching seat; 3. Pressure reducing valve; 4. Diaphragm valve; 5. Pressure relief valve; 6. Sliding block; 7. Sliding cavity; 8. Enclosed slider; 9. Second connecting hole; 10. First connecting hole; 11. Flow cavity; 12. Pressure relief hole; 13. First sealing ring; 14. Limiting inclined surface; 15. Abutting surface; 16. Limiting ring; 17. Communicating cavity; 18. Limiting cavity; 19. Exhaust pipe; 20. Connecting rod; 21. First connecting slide rod; 22. Telescopic rod; 23. Frame; 24. Elastic element. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 —3 provides further detailed description of this application.

[0028] This application discloses an automatic switching valve.

[0029] Example 1: Reference Figure 1 and Figure 2 An automatic switching valve includes a frame 23, on which a switching assembly is fixed. Two connecting pipes 1 are connected to both sides of the switching assembly. A pressure reducing valve 3 and a diaphragm valve 4 are sequentially installed on the connecting pipes 1 away from the switching assembly. The diaphragm valve 4 controls the opening and closing of the connecting pipes 1, and the pressure reducing valve 3 controls the air pressure within the connecting pipes 1. The end of the connecting pipe 1 away from the switching assembly is connected to an air tank. The switching assembly includes a switching seat 2 fixed to the frame 23. Two interconnected sliding chambers 7 are formed within the switching seat 2. Each sliding chamber 7 is cylindrical and corresponds to a connecting pipe 1, with each corresponding sliding chamber 7 communicating with the connecting pipe 1. The switching base 2 has several communicating cavities 17 connected to several sliding cavities 7. An exhaust pipe 19 connected to the communicating cavities 17 is fixed to the switching base 2. Sliding blocks 6, cylindrical blocks, are slidably connected within each sliding cavity 7. Sliding blocks 6 control the opening and closing of the communicating cavities 17. Two sliding blocks 6 abut against each other, and the sidewalls of the two sliding cavities 7 transition smoothly. High-pressure gas injected into the communicating pipe pushes sliding blocks 6 away from the connecting pipe 1 and opens the communicating cavity 17. Simultaneously, sliding block 6 pushes another sliding block 6 closer to the connecting pipe 1 and closes the communicating cavity 17. This allows control of the opening and closing of the two communicating cavities 17, improving the convenience of connecting the two gas tanks to the exhaust pipe 19.

[0030] A limiting inclined surface 14 is formed on the side of the sliding block 6 near the connecting pipe 1. A limiting ring 16 is integrally formed on the side of the sliding cavity 7 near the connecting pipe 1, which abuts against the limiting inclined surface 14. An abutting surface 15 is formed on the side of the sliding block 6 near the connecting pipe 1. Gas enters the sliding cavity 7, and the high-pressure gas acts directly on the abutting surface 15, pushing the sliding block 6 to move. After the sliding block 6 moves, the gas pressure falls back onto the limiting inclined surface 14, which greatly increases the force-bearing area of ​​the sliding block 6, thus making the sliding block 6 open more stably. Furthermore, the limiting inclined surface 14 and the limiting ring 16 cooperate to limit the sliding block 6, improving the stability of using the sliding block 6.

[0031] A limiting cavity 18 is provided inside the connecting cavity 17. A sealing slider 8 for closing the connecting cavity 17 is slidably connected inside the limiting cavity 18. The outer diameter of the sealing slider 8 first increases and then decreases along its length. An elastic element 24 for driving the sealing slider 8 to close the connecting cavity 17 is installed inside the limiting cavity 18. The elastic element 24 is a compression spring. By compressing the spring, the sealing slider 8 can be pressed tightly against the limiting cavity 18 to achieve a sealing effect.

[0032] A first sealing ring 13 is fixed to the inner wall of the sliding cavity 7, and the first sealing ring 13 abuts against the outer wall of the sliding block 6, thereby achieving the purpose of sealing the sliding block 6 and preventing the gas in the two sliding cavities 7 from communicating. A flow cavity 11 is formed between the two sliding blocks 6. A first connecting hole 10 communicating with the flow cavity 11 is opened on the switching seat 2, and a pressure relief hole 12 communicating with the flow cavity 11 is opened on the switching seat 2. A second connecting hole 9 communicating with the first connecting hole 10 is opened on the side wall of the sliding block 6. When the sliding block 6 is away from the connecting pipe 1, the opening of the second connecting hole 9 is located on the side of the first sealing ring 13 away from the connecting pipe 1. When the sliding block 6 is close to the connecting pipe 1, the second connecting hole 9 communicates with the connecting cavity 17. By controlling the position of the second connecting hole 9 at the first sealing ring 13, the communication between the connecting cavity 17 and the pressure relief hole 12 can be controlled. Thus, after the sliding block 6 seals the cavity, pressure can be relieved through the pressure relief hole 12, so that the closing slider 8 can more easily seal the connecting cavity 17.

[0033] A pressure relief valve 5 is connected to the connecting pipe 1. The pressure relief valve 5 is used to discharge the air in the connecting pipe 1. The pressure relief valve 5 can make the gas discharged from the exhaust pipe 19 purer and improve the stability of the supplied gas.

[0034] The implementation principle of Example 1 is as follows: In use, two gas cylinders are connected to connecting pipe 1, and then the pressure reducing valve 3 and diaphragm valve 4 are controlled to more conveniently control the gas pressure delivery. The pressure at one end of connecting pipe 1 is higher, which pushes a sliding block 6 to open the sliding chamber 7, and then another sliding block 6 closes the sliding chamber 7 at the other end. When the gas pressure in one gas cylinder is insufficient, the gas in the other gas cylinder can push another sliding block 6 to open the sliding chamber 7, thus allowing the sliding block 6 to more conveniently control the opening and closing of the connecting chamber 17. This allows for a smoother and continuous flow of gas, improving the convenience of using the automatic switching valve.

[0035] Example 2: Reference Figure 3 An automatic switching valve, which differs from Embodiment 1, has three sliding blocks 6 and three sliding grooves. The sliding blocks 6 slide within the sliding grooves. A connecting rod 20 is rotatably connected between two adjacent sliding blocks 6. The connecting rod 20 includes a first connecting slide rod 21 rotatably connected to the two sliding blocks 6. One of the first connecting slide rods 21 has a telescopic hole. A telescopic rod 22 that is inserted into the telescopic hole is fixed on the adjacent first connecting slide rod 21.

[0036] The implementation principle of Example 2 is as follows: Unlike Example 1, three sliders are used, which can connect three gas cylinders at the same time, increasing the number of gas cylinders that can be installed on the frame 23 and improving the convenience of using and replacing gas cylinders.

[0037] 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. An automatic switching valve, characterized in that: Includes a frame (23), on which a switching assembly is provided, and a plurality of connecting pipes (1) are connected to the switching assembly. A pressure reducing valve (3) and a diaphragm valve (4) are provided on the connecting pipes (1). The end of the connecting pipe (1) away from the switching assembly is connected to a gas tank. The switching assembly includes a switching seat (2) fixed on the frame (23). The switching seat (2) has a plurality of interconnected sliding cavities (7). The plurality of sliding cavities (7) are arranged one-to-one with the plurality of connecting pipes (1), and the corresponding sliding cavities (7) are connected to the connecting pipes (1). The switching seat (2) has a plurality of connecting cavities (17) connected to the plurality of sliding cavities (7). The switching seat (2) is provided with an exhaust pipe (19) connected to the plurality of connecting cavities (17). A sliding block (6) is slidably connected in the sliding cavity (7). The sliding block (6) is used to control the opening and closing of the connecting cavity (17). The high-pressure gas injected into the connecting pipe (1) pushes the sliding block (6) away from the connecting pipe (1) and opens the connecting cavity (17). At the same time, the sliding block (6) pushes the remaining sliding blocks (6) to move closer to the connecting pipe (1) and closes the connecting cavity (17). A limiting cavity (18) is provided in the communicating cavity (17), and a closing slider (8) for closing the communicating cavity (17) is slidably connected in the limiting cavity (18). An elastic element (24) for driving the closing slider (8) to close the communicating cavity (17) is provided in the limiting cavity (18). The inner wall of the sliding cavity (7) is provided with a first sealing ring (13), which abuts against the outer wall of the sliding block (6); A flow cavity (11) is formed between several sliding blocks (6). A pressure relief hole (12) communicating with the flow cavity (11) is provided on the switching seat (2). A first connecting hole (10) communicating with the flow cavity (11) is provided on the side of the sliding block (6) away from the connecting pipe (1). A second connecting hole (9) communicating with the first connecting hole (10) is provided on the side wall of the sliding block (6). When the sliding block (6) is away from the connecting pipe (1), the opening of the second connecting hole (9) is located on the side of the first sealing ring (13) away from the connecting pipe (1). When the sliding block (6) is close to the connecting pipe (1), the second connecting hole (9) is connected with the communicating cavity (17).

2. The automatic switching valve according to claim 1, characterized in that: The sliding block (6) has a limiting inclined surface (14) on the side near the connecting pipe (1), the sliding cavity (7) is provided with a limiting ring (16) that abuts against the limiting inclined surface (14), and the sliding block (6) has an abutting surface (15) formed on the side near the connecting pipe (1).

3. An automatic switching valve according to claim 1, characterized in that: A pressure relief valve (5) is connected to the connecting pipe (1), and the pressure relief valve (5) is used to discharge the air in the connecting pipe (1).

4. An automatic switching valve according to claim 1, characterized in that: Two sliding blocks (6) are provided, and the two sliding blocks (6) abut against each other, and the sidewalls of the two sliding cavities (7) are smoothly transitioned.

5. An automatic switching valve according to claim 1, characterized in that: Three sliding blocks (6) are provided, and a connecting rod (20) is rotatably connected between two adjacent sliding blocks (6). The connecting rod (20) includes a first connecting slide rod (21) rotatably connected to the two sliding blocks (6). One of the first connecting slide rods (21) has a telescopic hole, and an extension rod (22) that is inserted into the telescopic hole is provided on the adjacent first connecting slide rod (21).

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