Pressure controlled two-way valve

Abstract

The application discloses a pressure control type double-way valve, which comprises a high-pressure cavity, a first low-pressure cavity, a second low-pressure cavity and an air inlet, wherein the air inlet is communicated with the high-pressure cavity, the first low-pressure cavity and the second low-pressure cavity respectively, the high-pressure cavity is provided with a first sliding block and a high-pressure exhaust port, the first sliding block controls opening or closing of the high-pressure exhaust port; the first low-pressure cavity is provided with a second sliding block, the second sliding block is connected with a third sliding block, the second low-pressure cavity is provided with the third sliding block and a low-pressure exhaust port, and the third sliding block controls opening or closing of the low-pressure exhaust port. The double-way valve switch is completely controlled by external input pressure, which is different from the traditional electromagnetic valve coil electromagnetic drive control valve on-off mode. The high-pressure valve and the low-pressure valve switch can be automatically adjusted according to the pressure state, and the input control demand under the positive pressure, the normal pressure and the negative pressure state can be met, and the corresponding pressure gauge can be switched when the measured pressure reaches a certain threshold value.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a pressure-controlled two-way valve. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the temperature, pressure, and flow rate of the transported medium. They have functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, or overflow pressure relief. Valves can be controlled by various actuation methods, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electromagnetic-hydraulic, electro-hydraulic, and pneumatic-hydraulic. They can operate according to predetermined requirements under the influence of pressure, temperature, or other forms of sensor signals.

[0003] Some pressure measuring devices are specifically designed for positive or negative pressure environments. Currently, most positive pressure measuring instruments on the market can only be used in positive pressure environments; using them in negative pressure environments may affect their performance or even damage them. The same applies to some instruments designed for negative pressure measurements; using them in positive pressure environments can result in equipment damage. Therefore, it is necessary to design a two-way valve for positive and negative pressure gauges to ensure their safe use in both positive and negative pressure environments. Summary of the Invention

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this invention is to provide a pressure-controlled two-way valve that automatically adjusts the switching of the high-pressure valve and the low-pressure valve according to the pressure state, so as to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this invention to solve its technical problem is: a pressure-controlled two-way valve, comprising a high-pressure chamber, a first low-pressure chamber, a second low-pressure chamber, and an air inlet, wherein the air inlet is connected to the high-pressure chamber, the first low-pressure chamber, and the second low-pressure chamber respectively; the high-pressure chamber is provided with a first slider and a high-pressure exhaust port, wherein the first slider controls the opening or closing of the high-pressure exhaust port; the first low-pressure chamber is provided with a second slider, the second slider being connected to a third slider, wherein the second low-pressure chamber is provided with a third slider and a low-pressure exhaust port, wherein the third slider controls the opening or closing of the low-pressure exhaust port.

[0006] As a further improvement of the present invention: the air inlet is connected to the high-pressure chamber, the first low-pressure chamber and the second low-pressure chamber through a four-way pipe.

[0007] As a further improvement of the present invention: the high-pressure chamber is located above the air inlet, the first low-pressure chamber and the second low-pressure chamber are located below the air inlet, and the second low-pressure chamber is located to the right of the first low-pressure chamber.

[0008] As a further improvement of the present invention: the first slider is installed inside the high-pressure cavity, the first slider includes a first cylindrical part and a first conical part, the first cylindrical part and the first conical part are integrally formed, and the first conical part is located on the side close to the high-pressure exhaust port.

[0009] As a further improvement of the present invention: a number of sealing rings are installed on the outside of the first column to facilitate the first slider to slide left and right in the high-pressure chamber to maintain the air pressure difference.

[0010] As a further improvement of the present invention: a first spring is provided on the left side of the first slider, the left end of the first spring is fixedly connected to the left inner wall of the high-pressure cavity, and the right end of the first spring is connected to the first slider.

[0011] As a further improvement of the present invention: the right end of the first spring abuts against or is fixedly connected to the left side of the first slider.

[0012] As a further improvement of the present invention: the high-pressure exhaust port is installed at the right end of the high-pressure cavity, and the lower right side of the high-pressure cavity is provided with a first connection port connected to the air inlet.

[0013] As a further improvement of the present invention: the upper left side of the first low-pressure cavity is provided with a second connection port connected to the air inlet, and the right end of the first low-pressure cavity is provided with a first connecting hole.

[0014] As a further improvement of the present invention: the second slider is disposed inside the first low-pressure cavity, the second slider is cylindrical in shape, and a connecting rod is fixedly connected to the right end of the second slider.

[0015] As a further improvement of the present invention: several sealing rings are installed on the outside of the second slider to facilitate the second slider to slide left and right in the first low-pressure cavity to maintain the air pressure difference.

[0016] As a further improvement of the present invention: a third connection port connected to the air inlet is provided on the upper right side of the second low-pressure cavity, a second connecting hole is provided on the left end of the second low-pressure cavity, and the low-pressure exhaust port is installed on the right end of the second low-pressure cavity.

[0017] As a further improvement of the present invention: the third slider is disposed inside the second low-pressure cavity, the third slider includes a second cylindrical part and a second conical part, the second cylindrical part and the second conical part are integrally formed, the second conical part is disposed on the side near the low-pressure exhaust port, and the left end of the third slider is fixedly connected to the connecting rod.

[0018] As a further improvement of the present invention: one end of the connecting rod passes through the first connecting hole and is connected to the second slider, the other end of the connecting rod passes through the second connecting hole and is connected to the third slider, a second spring is installed on the outside of the connecting rod near the second slider, the left end of the second spring is connected to the second slider, and the right end of the second spring is fixedly connected to the right inner wall of the first low-pressure cavity.

[0019] As a further improvement of the present invention: the left end of the second spring abuts against or is fixedly connected to the right side of the second slider.

[0020] As a further improvement of the present invention: the diameter of the connecting rod is the same as the diameter of the first connecting hole and the second connecting hole.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. Unlike traditional solenoid valves that rely on electromagnetic drive to control valve opening and closing, this invention's two-way valve is entirely controlled by externally input pressure.

[0023] 2. This invention can automatically adjust the opening and closing of the high-pressure valve and the low-pressure valve according to the pressure status, while meeting the input control requirements under positive pressure, normal pressure and negative pressure conditions. When the pressure to be measured reaches a certain threshold, the corresponding pressure gauge can be switched.

[0024] 3. With the adoption of this invention, positive and negative pressure calculation tables can coexist on the same pipeline with fluctuating positive and negative pressure. For equipment with pressure protection requirements, such as equipment that only needs positive or negative pressure, it can play a role in protecting the equipment. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention when the external air pressure is normal.

[0026] Figure 2 This is a schematic diagram of the structure of the present invention when the external air pressure is positive.

[0027] Figure 3 This is a schematic diagram of the structure of the present invention when the external air pressure is negative.

[0028] Explanation of the labels in the diagram:

[0029] 1. High-pressure chamber; 2. First spring; 3. First slider; 31. First cylindrical part; 32. First conical part; 4. Sealing ring; 5. High-pressure exhaust port; 6. Air inlet; 7. First low-pressure chamber; 8. Second slider; 9. Second spring; 10. Connecting rod; 11. Second low-pressure chamber; 12. Third slider; 121. Second cylindrical part; 122. Second conical part; 13. Low-pressure exhaust port; 14. First connecting port; 15. Second connecting port; 16. Third connecting port; 17. First connecting hole; 18. Second connecting hole. Detailed Implementation

[0030] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0031] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0032] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] The present invention will now be further described in conjunction with the accompanying drawings and embodiments: such as Figure 1As shown, a pressure-controlled two-way valve includes a high-pressure chamber 1, a first low-pressure chamber 7, a second low-pressure chamber 11, and an air inlet 6. The air inlet 6 is connected to the high-pressure chamber 1, the first low-pressure chamber 7, and the second low-pressure chamber 11. The high-pressure chamber 1 is provided with a first slider 3 and a high-pressure exhaust port 5. The first slider 3 controls the opening or closing of the high-pressure exhaust port 5. The first low-pressure chamber 7 is provided with a second slider 8, which is connected to a third slider 12. The second low-pressure chamber 11 is provided with a third slider 12 and a low-pressure exhaust port 13. The third slider 12 controls the opening or closing of the low-pressure exhaust port 13.

[0035] The air inlet 6 is connected to the high-pressure chamber 1, the first low-pressure chamber 7, and the second low-pressure chamber 11 via a four-way pipe. The high-pressure chamber 1, the first low-pressure chamber 7, the second low-pressure chamber 11, and the four-way pipe are sealed together to ensure sufficient sealing of the entire system.

[0036] The high-pressure chamber 1 is located above the air inlet 6, the first low-pressure chamber 7 and the second low-pressure chamber 11 are located below the air inlet 6, and the second low-pressure chamber 11 is located to the right of the first low-pressure chamber 7.

[0037] The first slider 3 is installed inside the high-pressure chamber 1. The first slider 3 includes a first column part 31 and a first cone part 32. The first column part 31 and the first cone part 32 are integrally formed. The first cone part 32 is located on the side close to the high-pressure exhaust port 5.

[0038] Several sealing rings 4 are installed on the outside of the first column part 31 to facilitate the first slider 3 to slide left and right in the high pressure chamber 1 to maintain the air pressure difference.

[0039] A first spring 2 is provided on the left side of the first slider 3. The left end of the first spring 2 is fixedly connected to the left inner wall of the high-pressure chamber 1, and the right end of the first spring 2 is connected to the first slider 3.

[0040] The right end of the first spring 2 is abutted or fixedly connected to the left side of the first slider 3.

[0041] The high-pressure exhaust port 5 is installed at the right end of the high-pressure chamber 1. The lower right side of the high-pressure chamber 1 is provided with a first connection port 14 connected to the air inlet 6. When the first spring 2 is in the natural state, the first cone part 32 of the first slider 3 blocks the high-pressure exhaust port 5. Since the first connection port 14 is located on the side close to the first cone part 32, the first slider 3 will not block the first connection port 14. When the first spring 2 is in the compressed state, the first slider 3 is on the left side of the high-pressure chamber 1, and the first cone part 32 of the first slider 3 is separated from the high-pressure exhaust port 5.

[0042] The upper left side of the first low-pressure cavity 7 is provided with a second connection port 15 connected to the air inlet 6, and the right end of the first low-pressure cavity 7 is provided with a first connecting hole 17.

[0043] The second slider 8 is located inside the first low-pressure cavity 7. The second slider 8 is cylindrical in shape, and a connecting rod 10 is fixedly connected to the right end of the second slider 8.

[0044] The second slider 8 is equipped with several sealing rings 4 on its outside, which facilitates the second slider 8 to slide left and right in the first low-pressure chamber 7 to maintain the air pressure difference.

[0045] The third slider 12 is located inside the second low-pressure cavity 11. The third slider 12 includes a second column part 121 and a second cone part 122. The second column part 121 and the second cone part 122 are integrally formed. The second cone part 122 is located on the side near the low-pressure exhaust port 13. The left end of the third slider 12 is fixedly connected to the connecting rod 10.

[0046] The upper right side of the second low-pressure chamber 11 is provided with a third connection port 16 connected to the air inlet 6, and the left end of the second low-pressure chamber 11 is provided with a second connecting hole 18. The low-pressure exhaust port 13 is installed at the right end of the second low-pressure chamber 11. When the second spring 9 is in its natural state, the second slider 8 is in the middle of the first low-pressure chamber 7, and the third slider 12 is on the right side of the second low-pressure chamber 11. The second cone portion 122 of the third slider 12 blocks the low-pressure exhaust port 13. Since the third connection port 16 is located on the side close to the second cone portion 122, the third slider 12 will not block the third connection port 16. When the second spring 9 is in its extended state, the second slider 8 is on the left side of the first low-pressure chamber 7. The second slider 8 drives the third slider 12 to move to the left synchronously. The second slider 8 blocks the second connection port 15, and the second cone portion 122 of the third slider 12 separates from the low-pressure exhaust port 13.

[0047] One end of the connecting rod 10 passes through the first connecting hole 17 and is connected to the second slider 8. The other end of the connecting rod 10 passes through the second connecting hole 18 and is connected to the third slider 12. A second spring 9 is installed on the outside of the connecting rod 10 near the second slider 8. The left end of the second spring 9 is connected to the second slider 8, and the right end of the second spring 9 is fixedly connected to the right inner wall of the first low-pressure cavity 7.

[0048] The left end of the second spring 9 abuts or is fixedly connected to the right side of the second slider 8.

[0049] The diameter of the connecting rod 10 is the same as or slightly smaller than the diameter of the first connecting hole 17 and the second connecting hole 18.

[0050] The working principle of this invention: This invention utilizes a spring-driven self-resetting telescopic structure design. When the input air pressure changes to a required threshold, the spring's extension or contraction is controlled, further enabling the automatic opening and closing of the high-pressure exhaust port 5 and the low-pressure exhaust port 13. This two-way valve can meet the system's positive or negative pressure measurement requirements. It allows two pressure gauges to coexist on the same pipeline where the pressure varies.

[0051] like Figure 2 As shown, when the external air pressure is positive (i.e., higher than standard atmospheric pressure), high-pressure gas enters the high-pressure chamber 1, generating pressure that acts on the first slider 3. When the pressure reaches a certain value, it overcomes the force of the first spring 2 and compresses the first spring 2, causing the first slider 3 to move to the left. The first slider 3 separates from the high-pressure exhaust port 5, opening the high-pressure exhaust port 5. The high-pressure gas then enters the first low-pressure chamber 7, overcoming the force of the second spring 9 and pushing the second slider 8 to the right. This causes the third slider 12, connected to the second slider 8, to move synchronously to the right, blocking the low-pressure exhaust port 13, thus sealing the low-pressure exhaust port 13.

[0052] like Figure 3 As shown, when the external air pressure is negative, that is, when the external air pressure is lower than the standard atmospheric pressure, the first spring 2 inside the high-pressure chamber returns to its original state under negative pressure, the first slider 3 moves to the right and blocks the high-pressure exhaust port 5, thus sealing the high-pressure exhaust port 5; at the same time, the pressure pushing the second slider 8 inside the first low-pressure chamber 7 disappears, the second spring 9 returns to its original state and pushes the second slider 8 to the left, and the second slider 8 drives the third slider 12 to move to the left synchronously through the connecting rod 10, thus opening the low-pressure exhaust port 13.

[0053] like Figure 1 As shown, when the external air pressure is at normal pressure, that is, when the external air pressure is equal to the standard atmospheric pressure, the first spring 2 and the second spring 9 are both in their natural state, the first slider 3 is at the rightmost end of the high-pressure chamber 1, blocking the high-pressure exhaust port 5, the second slider 8 is at the right end of the first low-pressure chamber 7, causing the third slider 12 to block the low-pressure exhaust port 13, and the high-pressure exhaust port 5 and the low-pressure exhaust port 13 are closed at the same time.

[0054] Implementation Case 1:

[0055] This embodiment provides a pressure-controlled two-way valve, including a high-pressure chamber 1, a first low-pressure chamber 7, a second low-pressure chamber 11, and an air inlet 6. The air inlet 6 is connected to the high-pressure chamber 1, the first low-pressure chamber 7, and the second low-pressure chamber 11. The high-pressure chamber 1 is provided with a first slider 3 and a high-pressure exhaust port 5. The first slider 3 controls the opening or closing of the high-pressure exhaust port 5. The first low-pressure chamber 7 is provided with a second slider 8, which is connected to a third slider 12. The second low-pressure chamber 11 is provided with a third slider 12 and a low-pressure exhaust port 13. The third slider 12 controls the opening or closing of the low-pressure exhaust port 13.

[0056] The air inlet 6 is connected to the high-pressure chamber 1, the first low-pressure chamber 7, and the second low-pressure chamber 11 via a four-way pipe. The high-pressure chamber 1, the first low-pressure chamber 7, the second low-pressure chamber 11, and the four-way pipe are sealed together to ensure sufficient sealing of the entire system.

[0057] The high-pressure chamber 1 is located above the air inlet 6, the first low-pressure chamber 7 and the second low-pressure chamber 11 are located below the air inlet 6, and the second low-pressure chamber 11 is located to the right of the first low-pressure chamber 7.

[0058] The first slider 3 is installed inside the high-pressure chamber 1. The first slider 3 includes a first column part 31 and a first cone part 32. The first column part 31 and the first cone part 32 are integrally formed. The first cone part 32 is located on the side close to the high-pressure exhaust port 5.

[0059] Two sealing rings 4 are installed on the outside of the first column part 31 to facilitate the first slider 3 to slide left and right in the high pressure chamber 1 to maintain the air pressure difference. The sealing rings 4 are respectively located at both ends of the first column part 31.

[0060] A first spring 2 is provided on the left side of the first slider 3. The left end of the first spring 2 is fixedly connected to the left inner wall of the high-pressure chamber 1, and the right end of the first spring 2 is connected to the first slider 3.

[0061] The right end of the first spring 2 is abutted or fixedly connected to the left side of the first slider 3.

[0062] The high-pressure exhaust port 5 is installed at the right end of the high-pressure chamber 1. The lower right side of the high-pressure chamber 1 is provided with a first connection port 14 connected to the air inlet 6. When the first spring 2 is in the natural state, the first cone part 32 of the first slider 3 blocks the high-pressure exhaust port 5. Since the first connection port 14 is located on the side close to the first cone part 32, the first slider 3 will not block the first connection port 14. When the first spring 2 is in the compressed state, the first slider 3 is on the left side of the high-pressure chamber 1, and the first cone part 32 of the first slider 3 is separated from the high-pressure exhaust port 5.

[0063] The upper left side of the first low-pressure cavity 7 is provided with a second connection port 15 connected to the air inlet 6, and the right end of the first low-pressure cavity 7 is provided with a first connecting hole 17.

[0064] The second slider 8 is located inside the first low-pressure cavity 7. The second slider 8 is cylindrical in shape, and a connecting rod 10 is fixedly connected to the right end of the second slider 8.

[0065] Two sealing rings 4 are installed on the outside of the second slider 8 to facilitate the second slider 8 to slide left and right in the first low-pressure chamber 7 to maintain the air pressure difference. The sealing rings 4 are respectively located at both ends of the second slider 8.

[0066] The third slider 12 is located inside the second low-pressure cavity 11. The third slider 12 includes a second column part 121 and a second cone part 122. The second column part 121 and the second cone part 122 are integrally formed. The second cone part 122 is located on the side near the low-pressure exhaust port 13. The left end of the third slider 12 is fixedly connected to the connecting rod 10.

[0067] The upper right side of the second low-pressure chamber 11 is provided with a third connection port 16 connected to the air inlet 6, and the left end of the second low-pressure chamber 11 is provided with a second connecting hole 18. The low-pressure exhaust port 13 is installed at the right end of the second low-pressure chamber 11. When the second spring 9 is in its natural state, the second slider 8 is in the middle of the first low-pressure chamber 7, and the third slider 12 is on the right side of the second low-pressure chamber 11. The second cone portion 122 of the third slider 12 blocks the low-pressure exhaust port 13. Since the third connection port 16 is located on the side close to the second cone portion 122, the third slider 12 will not block the third connection port 16. When the second spring 9 is in its extended state, the second slider 8 is on the left side of the first low-pressure chamber 7. The second slider 8 drives the third slider 12 to move to the left synchronously. The second slider 8 blocks the second connection port 15, and the second cone portion 122 of the third slider 12 separates from the low-pressure exhaust port 13.

[0068] One end of the connecting rod 10 passes through the first connecting hole 17 and is connected to the second slider 8. The other end of the connecting rod 10 passes through the second connecting hole 18 and is connected to the third slider 12. A second spring 9 is installed on the outside of the connecting rod 10 near the second slider 8. The left end of the second spring 9 is connected to the second slider 8, and the right end of the second spring 9 is fixedly connected to the right inner wall of the first low-pressure cavity 7.

[0069] The left end of the second spring 9 abuts or is fixedly connected to the right side of the second slider 8.

[0070] The diameter of the connecting rod 10 is the same as or slightly smaller than the diameter of the first connecting hole 17 and the second connecting hole 18.

[0071] The main functions of this invention are:

[0072] 1. Unlike traditional solenoid valves that rely on electromagnetic drive to control valve opening and closing, this invention's two-way valve is entirely controlled by externally input pressure.

[0073] 2. This invention can automatically adjust the opening and closing of the high-pressure valve and the low-pressure valve according to the pressure status, while meeting the input control requirements under positive pressure, normal pressure and negative pressure conditions. When the pressure to be measured reaches a certain threshold, the corresponding pressure gauge can be switched.

[0074] 3. With the adoption of this invention, positive and negative pressure calculation tables can coexist on the same pipeline with fluctuating positive and negative pressure. For equipment with pressure protection requirements, such as equipment that only needs positive or negative pressure, it can play a role in protecting the equipment.

[0075] In summary, after reading this invention document, those skilled in the art can make various other corresponding modifications to the technical solutions and concepts based on this invention without creative mental effort, and all of these modifications fall within the scope of protection of this invention.

Claims

1. A pressure-controlled two-way valve, characterized in that, It includes a high-pressure chamber, a first low-pressure chamber, a second low-pressure chamber, and an air inlet. The air inlet is connected to the high-pressure chamber, the first low-pressure chamber, and the second low-pressure chamber. The high-pressure chamber is provided with a first slider and a high-pressure exhaust port. The first slider controls the opening or closing of the high-pressure exhaust port. The first low-pressure chamber is provided with a second slider, which is connected to a third slider. The second low-pressure chamber is provided with a third slider and a low-pressure exhaust port. The third slider controls the opening or closing of the low-pressure exhaust port. The high-pressure chamber is located above the air inlet, the first low-pressure chamber and the second low-pressure chamber are located below the air inlet, and the second low-pressure chamber is located to the right of the first low-pressure chamber; the upper left side of the first low-pressure chamber has a second connection port connected to the air inlet, and the right end of the first low-pressure chamber has a first connecting hole; the upper right side of the second low-pressure chamber has a third connection port connected to the air inlet, and the left end of the second low-pressure chamber has a second connecting hole, and the low-pressure exhaust port is located at the right end of the second low-pressure chamber; The second slider is located inside the first low-pressure cavity, and a connecting rod is fixedly connected to the right end of the second slider; one end of the connecting rod passes through the first connecting hole and is connected to the second slider, and the other end of the connecting rod passes through the second connecting hole and is connected to the third slider; a second spring is installed on the outside of the connecting rod near the second slider, the left end of the second spring is connected to the second slider, and the right end of the second spring is fixedly connected to the right inner wall of the first low-pressure cavity. Under positive pressure, the high-pressure gas pushes the first slider to compress the first spring, opening the high-pressure exhaust port; at the same time, it pushes the second slider to compress the second spring, and the third slider blocks the low-pressure exhaust port; under negative pressure, the first spring returns to its original position, and the first slider blocks the high-pressure exhaust port; the second spring returns to its original position, causing the second slider to block the second connection port, and the third slider to open the low-pressure exhaust port; under normal pressure, both the first and second springs return to their original positions, and both the high-pressure and low-pressure exhaust ports are closed. The first slider is installed inside the high-pressure chamber. The first slider includes a first cylindrical part and a first conical part. The first conical part is located on the side near the high-pressure exhaust port. A first spring is provided on the left side of the first slider. The left end of the first spring is fixedly connected to the left inner wall of the high-pressure chamber, and the right end of the first spring is connected to the first slider. The high-pressure exhaust port is installed at the right end of the high-pressure chamber. A first connection port connected to the air inlet is provided on the lower right side of the high-pressure chamber.

2. The pressure-controlled two-way valve according to claim 1, characterized in that, The third slider is located inside the second low-pressure cavity. The third slider includes a second cylindrical part and a second conical part. The second conical part is located on the side near the low-pressure exhaust port. The left end of the third slider is fixedly connected to the connecting rod.

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