A double-acting piston pressure flow amplifier

Abstract

The utility model discloses an industry flow control field's double -acting piston formula pressure flow amplifier, including organism, piston subassembly, valve core no.

Description

Technical Field

[0001] This utility model relates to the field of industrial flow control, and in particular to a double-acting piston pressure flow amplifier. Background Technology

[0002] Automatic control valves are an important component of industrial automation instrumentation. Valve positioners, as key control accessories for control valves, significantly improve valve control characteristics, enhancing control accuracy, response speed, and flexibility. The pressure generated by the electrical conversion module in the valve positioner is typically 0.015–1.0 kg / cm². 2 The circuit pressure of the pneumatic actuator of the positioner typically needs to be 1.4–7.0 kg / cm². 2 Therefore, pressure-flow amplifiers are needed to coordinate them. Pressure-flow amplifiers, also known as pneumatic amplifiers, are essentially micro-pressure control elements. They use a very low-pressure, low-flow-rate air pressure signal as the input control signal to obtain a high-pressure, high-flow-rate air pressure signal capable of driving pneumatic actuators.

[0003] Pressure and flow amplifiers can be classified into several types according to their structure, including diaphragm type, diaphragm shut-off type, diaphragm slider type, and diaphragm sliding column type; according to the form of air resistance within their structure, they can be divided into adjustable amplifiers and non-adjustable amplifiers; and according to their performance, they can be divided into on / off amplifiers and proportional amplifiers. Diaphragm proportional amplifiers are generally used in valve positioners. However, these amplifiers have only one output port, and the pressure fluctuation of the output air is relatively large, making them unsuitable for certain application scenarios. Utility Model Content

[0004] To address the aforementioned problems in the existing technology, this utility model provides a double-acting piston-type pressure and flow amplifier, which regulates the flow and pressure of two air paths through the linear reciprocating motion of a piston, making it applicable to a wider range of scenarios; moreover, it is equipped with a pressure stabilizing device, resulting in smaller pressure fluctuations in the output air.

[0005] The technical solution of this utility model is as follows:

[0006] A double-acting piston-type pressure and flow amplifier includes a body 1, a piston assembly 2, a valve core 1 3, a valve core 2 4, a coil spring 1 5, a coil spring 2 6, and a coil spring 3 7.

[0007] The body 1 has three chambers: an adjustment chamber 8, an air intake chamber 1 9, and an air intake chamber 2 10; the three chambers are connected by a piston pipe 11; the central axis of the piston pipe 11 is a straight line.

[0008] The body 1 is provided with two pipes: an air intake duct 12 and an air intake duct 2 13; one end of the air intake duct 12 is connected to the air intake chamber 9, and the other end of the air intake duct 12 is connected to the outside, and compressed air from the outside flows into the air intake chamber 9 from the air intake duct 12; one end of the air intake duct 2 13 is connected to the air intake chamber 2 10, and the other end of the air intake duct 2 13 is connected to the outside, and compressed air from the outside flows into the air intake chamber 2 10 from the air intake duct 2 13.

[0009] The body 1 is provided with two pipes: an air outlet 14 and an air outlet 15; one end of the air outlet 14 is connected to the air inlet 9, and the other end of the air outlet 14 is connected to the outside, and the compressed air in the air inlet 9 flows out to the outside through the air outlet 14; one end of the air outlet 15 is connected to the air inlet 10, and the other end of the air outlet 15 is connected to the outside, and the compressed air in the air inlet 10 flows out to the outside through the air outlet 15.

[0010] The valve core 3 is shaped like a dumbbell, with a round rod in the middle and a large spherical crown and a small spherical crown at each end; the large spherical crown is called the valve stop 301, and the small spherical crown is called the piston stop 302; the valve core 3 is located inside the intake chamber 9, and the central axis of the valve core 3 coincides with the central axis of the piston pipe 11; the valve core 3 can move linearly along the central axis of the piston pipe 11; after the valve core 3 moves to a designated position in the direction of the piston pipe 11, the valve stop 301 will be blocked by the body 1, and this position is called valve one; the coil spring 5 presses the valve stop 301 tightly against valve one; when the valve stop 301 is stopped at valve one, the outlet passage 14 is not connected to the intake chamber 9, and compressed air cannot flow from the intake chamber 9 to the outlet passage 14;

[0011] The structure of valve core 2 4 is the same as that of valve core 1 3. It is located inside the intake chamber 2 10, and the central axis of valve core 2 4 coincides with the central axis of piston pipe 11. Valve core 2 4 can move linearly along the central axis of piston pipe 11. After valve core 2 4 moves to a designated position in the direction of piston pipe 11, valve stop 401 will be blocked by the engine body 1. This position is called valve 2. The coil spring 2 5 presses valve stop 401 tightly against valve 2. When valve stop 401 is stopped at valve 2, the outlet passage 2 15 is not connected to the intake chamber 2 10, and compressed air cannot flow from the intake chamber 2 10 to the outlet passage 2 15.

[0012] The piston assembly 3 includes a piston rod 16, a flexible sealing sheet 17, a sealing sheet fixing member 18, and a sealing sheet fixing member 2 19; the piston rod 16 is a round rod structure with a diameter smaller than that of the piston channel 11; the flexible sealing sheet 17 is a thin sheet structure and is fixed to the piston rod 16 by the sealing sheet fixing member 18 and the sealing sheet fixing member 2 19; the relative positions of the piston rod 16 and the flexible sealing sheet 17 meet the following conditions:

[0013] (1-1) The thickness direction of the flexible sealing sheet 17 is parallel to the central axis of the piston rod 16;

[0014] (1-2) Take a plane perpendicular to the central axis of the piston rod 16. The projection of the flexible sealing sheet 17 on this plane completely blocks the projection of the piston rod 16 on this plane.

[0015] (1-3) Select two end faces of the piston rod 16 that are perpendicular to the central axis, and the flexible sealing sheet 17 is located between these two end faces;

[0016] The flexible sealing sheet 17 is fixed inside the regulating cavity 8, dividing the regulating cavity 8 into two chambers: the IP chamber 20 and the back pressure chamber 21; the compressed air in the IP chamber 20 cannot flow into the back pressure chamber 21.

[0017] The piston rod 16 is located inside the piston pipe 11 and can move linearly along the central axis of the piston pipe 11. After the piston rod 16 moves to a designated position in the direction close to the valve core 3, the sealing plate fixing member 18 will be blocked by the machine body 1. This position is called the piston limit. The helical spring 7 presses the piston assembly 3 against the piston limit.

[0018] The body 1 is provided with an IP air intake duct 22; one end of the IP air intake duct 22 is connected to the IP cavity 20, and the other end is connected to the outside. Compressed air flows into the IP cavity 20 from the IP air intake duct 22; the compressed air flowing into the IP air intake duct 22 is called regulating air, the compressed air flowing into the first air intake duct 12 and the second air intake duct 13 is called input air, the compressed air flowing out of the first air outlet duct 14 is called output air one, and the compressed air flowing out of the second air outlet duct 15 is called output air two.

[0019] After the regulating air flows into the IP cavity 20 from the IP intake passage 22, the pressure inside the IP cavity 20 increases, the coil spring 37 is compressed, and the piston rod 16 moves inside the piston passage 11, moving away from the intake cavity 19 and closer to the intake cavity 20. The piston stop 302 of the valve core 3 remains in contact with the piston rod 16. Under the push of the coil spring 5, the valve core 3 moves closer to the valve. The closer the valve core 3 is to the valve, the less compressed air flows into the exhaust passage 12 from the intake cavity 9. When the valve stop 301 of the valve core 3 reaches the valve, the piston stop 302 of the valve core 3... When the piston rod 16 disengages from the intake chamber 19, the flow rate of compressed air into the exhaust passage 12 reaches its minimum. After the piston rod 16 contacts the piston stop 402 of the valve core 4, the piston rod 16 pushes the piston stop 402 of the valve core 4, causing the valve stop 401 of the valve core 4 to move away from the valve, and compressed air flows from the intake chamber 10 into the exhaust passage 15. The greater the distance between the valve core 4 and the valve, the more compressed air flows into the exhaust passage 15. When the sealing plate fixing part 19 contacts the machine body 1, the flow of compressed air into the exhaust passage 15 reaches its maximum value.

[0020] Reducing the amount of regulating air inside IP cavity 20 decreases the pressure inside IP cavity 20. The coil spring 3 7, through the sealing plate fixing member 2 19, pushes the piston rod 16 closer to intake cavity 1 9 and away from intake cavity 2 10. The piston stop 402 of valve core 2 4 remains in contact with the piston rod 16. Under the push of the coil spring 2 6, the valve stop 402 of valve core 2 4 moves closer to valve 2. The closer the valve stop 402 is to valve 2, the less compressed air flows from intake cavity 2 10 into exhaust passage 2 13. When the valve stop 402 moves to valve 2... When the compressed air flowing from the intake chamber 2 10 into the exhaust passage 2 13 reaches its minimum value; after the piston stop 302 of the valve core 3 comes into contact with the piston rod 16, the valve core 3 is pushed by the piston rod 16, causing the valve stop 301 of the valve core 3 to move away from the valve, and the compressed air flows from the intake chamber 19 into the exhaust passage 14; the farther the valve stop 301 of the valve core 3 is from the valve, the more compressed air flows into the exhaust passage 14; after the piston rod 16 moves to the piston limit, the compressed air flowing into the exhaust passage 14 reaches its maximum value.

[0021] Gradually increase the amount of regulating air inside IP cavity 20, the pressure inside IP cavity 20 gradually increases, the flow rate of air output from outlet 2 15 gradually increases to its maximum value, and the flow rate of air output from outlet 14 gradually decreases to its minimum value; gradually decrease the amount of regulating air inside IP cavity 20, the pressure inside IP cavity 20 gradually decreases, the flow rate of air output from outlet 14 gradually increases to its maximum value, and the flow rate of air output from outlet 2 15 gradually decreases to its minimum value.

[0022] Furthermore, the first air intake 12 and the second air intake 13 are connected, and the input air can flow into the first air intake chamber 9 and the second air intake chamber 10 simultaneously from the first air intake 12, or into the first air intake chamber 9 and the second air intake chamber 10 simultaneously from the second air intake 13.

[0023] Furthermore, a window is provided on the body 1 so that the back pressure chamber 21 is connected to the outside, and outside air can flow into the back pressure chamber 21 through the window; the sealing plate fixing member 29 extends from the window to the outside of the body 1, that is, a part of the sealing plate fixing member 19 is located inside the adjustment chamber 8, and the other part is located outside the body 1 and is fixedly connected to the permanent magnet 23; the permanent magnet 23 moves together with the piston assembly 3.

[0024] Furthermore, the piston rod 16 is a hollow cylinder; the pipe inside the piston rod 16 is called the vent; the piston rod 16 is provided with a through hole, called the vent hole 24; the central axis of the vent hole 24 is perpendicular to and intersects the central axis of the piston rod 16; when the piston rod 16 moves in the piston pipe 11, the vent hole 24 is always located inside the back pressure chamber 21.

[0025] Furthermore, an annular sealing ring 25 is provided between the piston rod 16 and the piston pipe 11, so that compressed air cannot flow through the gap between the piston rod 16 and the piston pipe 11;

[0026] When the piston stop 302 of valve core 3 contacts the piston rod 16, the piston stop 402 of valve core 4 does not contact the piston rod 16, and the back pressure chamber 21 and the outlet passage 2 15 are connected through the vent hole 24 and the vent passage.

[0027] When the piston stop 402 of valve core 2 4 contacts the piston rod 16, the piston stop 302 of valve core 3 3 does not contact the piston rod 16, and the back pressure chamber 21 and the outlet passage 14 are connected through the vent hole 24 and the vent passage.

[0028] Furthermore, observing along the central axis of the piston rod 16, the IP chamber 20 is located between the first intake chamber 9 and the second intake chamber 10.

[0029] Furthermore, the machine body 1 is equipped with a pressure stabilizing device; the pressure stabilizing device includes a spring plate 26, a flexible sealing plate 27, and a cover plate 28; both the spring plate 26 and the flexible sealing plate 27 are thin sheet structures, and their thickness directions are perpendicular to the central axis of the piston rod 16; the cover plate 28 presses the spring plate 26 and the flexible sealing plate 27 onto the machine body 1, so that a cavity is formed between the flexible sealing plate 27 and the machine body 1, which is called the pressure stabilizing chamber 29;

[0030] The intake chamber 9 is connected to the pressure stabilizing chamber 29, and the input air flows into the pressure stabilizing chamber 29 through the intake chamber 9.

[0031] The beneficial technical effects of this utility model are as follows:

[0032] (1) It can control the pressure and flow rate of two gas paths at the same time, making it applicable to a wider range of scenarios;

[0033] (2) A pressure stabilizing device is installed, resulting in smaller pressure fluctuations. Attached Figure Description

[0034] Figure 1 This is an appearance diagram of an embodiment;

[0035] Figure 2 This is a cross-sectional view of an embodiment;

[0036] Figure 3 This is a structural diagram of the piston assembly.

[0037] In the diagram, the correspondence between the component names and their corresponding numbers is as follows: 1. Engine body; 2. Piston assembly; 3. Valve core 1; 4. Valve core 2; 5. Coil spring 1; 6. Coil spring 2; 7. Coil spring 3; 8. Adjustment chamber; 9. Intake chamber 1; 10. Intake chamber 2; 11. Piston pipe; 12. Intake passage 1; 13. Intake passage 2; 14. Exit passage 1; 15. Exit passage 2; 16. Piston rod; 17. Flexible sealing plate; 18. 19. Sealing plate fixing component one; 20. Sealing plate fixing component two; 21. IP cavity; 22. Back pressure cavity; 23. IP intake passage; 24. Permanent magnet; 25. Vent hole; 26. Annular sealing ring; 27. Spring plate; 28. Flexible sealing plate two; 29. ​​Cover plate; 200. Pressure stabilizing cavity; 301. Valve stop of valve core one; 302. Piston stop of valve core one; 401. Valve stop of valve core two; 402. Piston stop of valve core two. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0039] The structure of the embodiment is as follows Figure 1 , 2 As shown, it mainly consists of body 1, piston assembly 2, valve core 1 3, valve core 2 4, coil spring 1 5, coil spring 2 6, and coil spring 3 7.

[0040] The body 1 has three chambers: an adjustment chamber 8, an air intake chamber 1 9, and an air intake chamber 2 10. These three chambers are connected by a piston pipe 11. The piston pipe 11 is a circular pipe with a straight central axis, used to install the piston assembly 2 and to allow the piston assembly 2 to perform linear reciprocating motion.

[0041] The main body 1 has two pipes: intake duct 12 and intake duct 2 13. One end of intake duct 12 is connected to intake chamber 9, and the other end is connected to the outside. Compressed air from the outside flows into intake chamber 9 through intake duct 12. One end of intake duct 2 13 is connected to intake chamber 2 10, and the other end is connected to the outside. Compressed air from the outside flows into intake chamber 2 10 through intake duct 2 13. Intake duct 12 and intake duct 2 13 are connected by a pipe, so compressed air from the outside can flow into both intake chamber 9 and intake chamber 2 10 simultaneously from intake duct 12, or simultaneously from intake duct 2 13.

[0042] The main body 1 has two pipes: exhaust pipe 14 and exhaust pipe 15. One end of exhaust pipe 14 is connected to intake chamber 9, and the other end is connected to the outside. Compressed air from intake chamber 9 flows out through exhaust pipe 14 to the outside. One end of exhaust pipe 15 is connected to intake chamber 10, and the other end is connected to the outside. Compressed air from intake chamber 10 flows out through exhaust pipe 15 to the outside. A flow rate adjustment mechanism, valve core 3, is installed between exhaust pipe 14 and intake chamber 9 to achieve flow rate regulation. The same applies to exhaust pipe 15.

[0043] The valve core 3 is shaped like a dumbbell, with a round rod in the middle and a large and a small spherical crown at each end. The large spherical crown is called the valve stop 301, and the small spherical crown is called the piston stop 302. The valve core 3 is located inside the intake chamber 9, and its central axis coincides with the central axis of the piston passage 11. The valve core 3 can move linearly along the central axis of the piston passage 11. After the valve core 3 moves to a designated position in the direction of the piston passage 11, the valve stop 301 is blocked by the engine block 1; this position is called valve one. The coil spring 5 presses the valve stop 301 firmly against valve one. When the valve stop 301 is at valve one, the outlet passage 14 is not connected to the intake chamber 9, and compressed air cannot flow from the intake chamber 9 to the outlet passage 14.

[0044] Valve core 2 (4) has the same structure as valve core 1 (3), and is located inside intake chamber 2 (10), with its central axis coinciding with the central axis of piston passage 11. Valve core 2 (4) can move linearly along the central axis of piston passage 11. After valve core 2 (4) moves to a designated position in the direction of piston passage 11, valve stop 401 is blocked by the engine block 1; this position is called valve 2. Coil spring 2 (5) presses valve stop 401 firmly against valve 2. When valve stop 401 is in valve 2, exhaust passage 2 (15) is not connected to intake chamber 2 (10), and compressed air cannot flow from intake chamber 2 (10) to exhaust passage 2 (15).

[0045] like Figure 3 As shown, the piston assembly 3 includes a piston rod 16, a flexible sealing plate 17, a sealing plate fixing member 18, and a sealing plate fixing member 2 19. The piston rod 16 is a round rod structure with a diameter smaller than that of the piston channel 11. The flexible sealing plate 17 is a thin sheet structure and is fixed to the piston rod 16 by the sealing plate fixing member 18 and the sealing plate fixing member 2 19. The relative positions of the piston rod 16 and the flexible sealing plate 17 meet the following conditions:

[0046] (1-1) The thickness direction of the flexible sealing sheet 17 is parallel to the central axis of the piston rod 16;

[0047] (1-2) Take a plane perpendicular to the central axis of the piston rod 16. The projection of the flexible sealing sheet 17 on this plane completely blocks the projection of the piston rod 16 on this plane.

[0048] (1-3) Select two end faces of the piston rod 16 that are perpendicular to the central axis, and the flexible sealing sheet 17 is located between these two end faces.

[0049] The flexible sealing sheet 17 is fixed inside the regulating cavity 8, dividing the regulating cavity 8 into two chambers: the IP chamber 20 and the back pressure chamber 21. Compressed air in the IP chamber 20 cannot flow into the back pressure chamber 21. Observing along the central axis of the piston rod 16, the IP chamber 20 is located between the first intake chamber 9 and the second intake chamber 10.

[0050] The piston rod 16 is located inside the piston pipe 11 and can move linearly along the central axis of the piston pipe 11. After the piston rod 16 moves to a designated position in the direction close to the valve core 3, the sealing plate fixing member 18 will be blocked by the machine body 1. This position is called the piston limit. The helical spring 7 presses the piston assembly 3 against the piston limit.

[0051] The piston rod 16 is a hollow cylinder, and the channel inside the piston rod 16 is called the vent. The piston rod 16 is provided with a through hole, called the vent hole 24. The central axis of the vent hole 24 is perpendicular to and intersects the central axis of the piston rod 16. When the piston rod 16 moves in the piston channel 11, the vent hole 24 is always located inside the back pressure chamber 21.

[0052] An annular sealing ring 25 is provided between the piston rod 16 and the piston pipe 11, preventing compressed air from flowing through the gap between the piston rod 16 and the piston pipe 11. When the piston stop 302 of valve core 3 contacts the piston rod 16, the piston stop 402 of valve core 4 does not contact the piston rod 16, and the back pressure chamber 21 is connected to the outlet passage 15 through the vent hole 24 and the vent passage; when the piston stop 402 of valve core 4 contacts the piston rod 16, the piston stop 302 of valve core 3 does not contact the piston rod 16, and the back pressure chamber 21 is connected to the outlet passage 14 through the vent hole 24 and the vent passage. Simultaneously, a window, called a ventilation window, is provided on the body 1. The ventilation window allows the back pressure chamber 21 to connect with the outside, and outside air can flow into the back pressure chamber 21 through this window. This design ensures that the pressure inside the back pressure chamber 21 is always equal to the pressure of the outside air, and that the minimum pressure of the first air outlet 14 and the second air outlet 15 is equal to the pressure of the outside air.

[0053] The sealing plate fixing member 19 extends from the vent to the outside of the body 1; that is, a part of the sealing plate fixing member 19 is located inside the regulating chamber 8, and the other part is located outside the body 1 and is fixedly connected to the permanent magnet 23. The permanent magnet 23 moves with the piston assembly 3, so the displacement of the piston rod 16 can be determined by measuring the displacement of the permanent magnet 23. Adjusting the pressure of the compressed air in the electrical conversion module according to the displacement of the piston rod 16 can further improve the overall performance of the automatic regulating valve.

[0054] An IP air inlet 22 is provided on the body 1. One end of the IP air inlet 22 is connected to the IP cavity 20, and the other end is connected to the outside. Compressed air can flow into the IP cavity 20 from the IP air inlet 22. Compressed air from the electrical conversion module is input into the IP air inlet 22 and then flows into the IP cavity 20. The pressure inside the IP cavity 20 can be adjusted by adjusting the pressure of the compressed air from the electrical conversion module. The compressed air flowing into the IP air inlet 22 is called regulating air, the compressed air flowing into air inlet 12 and air inlet 13 is called input air, the compressed air flowing out of air outlet 14 is called output air 1, and the compressed air flowing out of air outlet 15 is called output air 2.

[0055] The working principle of the embodiment is as follows:

[0056] After the regulating air flows into the IP cavity 20 from the IP intake passage 22, the pressure inside the IP cavity 20 increases, the coil spring 37 is compressed, and the piston rod 16 moves inside the piston passage 11, moving away from the intake cavity 19 and closer to the intake cavity 20. The piston stop 302 of the valve core 3 remains in contact with the piston rod 16. Under the push of the coil spring 5, the valve core 3 moves closer to the valve. The closer the valve core 3 is to the valve, the less compressed air flows into the exhaust passage 12 from the intake cavity 9. When the valve stop 301 of the valve core 3 reaches the valve, the piston stop 302 of the valve core 3... When the piston rod 16 disengages from the intake chamber 19, the flow rate of compressed air into the exhaust passage 12 reaches its minimum. After the piston rod 16 contacts the piston stop 402 of the valve core 4, the piston rod 16 pushes the piston stop 402 of the valve core 4, causing the valve stop 401 of the valve core 4 to move away from the valve, and compressed air flows from the intake chamber 10 into the exhaust passage 15. The greater the distance between the valve core 4 and the valve, the more compressed air flows into the exhaust passage 15. When the sealing plate fixing part 19 contacts the machine body 1, the flow of compressed air into the exhaust passage 15 reaches its maximum value.

[0057] Reducing the amount of regulating air inside IP cavity 20 decreases the pressure inside IP cavity 20. The coil spring 3 7, through the sealing plate fixing member 2 19, pushes the piston rod 16 closer to intake cavity 1 9 and away from intake cavity 2 10. The piston stop 402 of valve core 2 4 remains in contact with the piston rod 16. Under the push of the coil spring 2 6, the valve stop 402 of valve core 2 4 moves closer to valve 2. The closer the valve stop 402 is to valve 2, the less compressed air flows from intake cavity 2 10 into exhaust passage 2 13. When the valve stop 402 moves to valve 2... When the compressed air flowing from the intake chamber 2 10 into the exhaust passage 2 13 reaches its minimum value; after the piston stop 302 of the valve core 3 comes into contact with the piston rod 16, the valve core 3 is pushed by the piston rod 16, causing the valve stop 301 of the valve core 3 to move away from the valve, and the compressed air flows from the intake chamber 19 into the exhaust passage 14; the farther the valve stop 301 of the valve core 3 is from the valve, the more compressed air flows into the exhaust passage 14; after the piston rod 16 moves to the piston limit, the compressed air flowing into the exhaust passage 14 reaches its maximum value.

[0058] The above-described motion process can be summarized as follows: Gradually increasing the amount of regulating air inside IP cavity 20 causes a gradual increase in pressure within IP cavity 20, a gradual increase in the flow rate of output air two from outlet 15 to its maximum value, and a gradual decrease in the flow rate of output air one from outlet 14 to its minimum value; conversely, gradually decreasing the amount of regulating air inside IP cavity 20 causes a gradual decrease in pressure within IP cavity 20, a gradual increase in the flow rate of output air one from outlet 14 to its maximum value, and a gradual decrease in the flow rate of output air two from outlet 15 to its minimum value. Therefore, in this embodiment, the output of two compressed air streams can be simultaneously controlled by the movement of a single piston.

[0059] To stabilize the output air pressure, the machine body 1 is equipped with a pressure stabilizing device. This device includes a spring plate 26, a flexible sealing plate 27, and a cover plate 28. Both the spring plate 26 and the flexible sealing plate 27 are thin sheet structures, with their thickness directions perpendicular to the central axis of the piston rod 16. The cover plate 28 presses the spring plate 26 and the flexible sealing plate 27 tightly against the machine body 1, forming a chamber between the flexible sealing plate 27 and the machine body 1, called the pressure stabilizing chamber 29. The intake chamber 9 is connected to the pressure stabilizing chamber 29, and input air flows into the pressure stabilizing chamber 29 through the intake chamber 9. When the input air pressure fluctuates, the spring plate 26 deforms, causing a change in the volume of the pressure stabilizing chamber 29, thereby reducing the amplitude of the pressure fluctuation.

[0060] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, and for those of ordinary skill in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details.

Claims

1. A double-acting piston-type pressure-flow amplifier, characterized in that: It includes the body (1), piston assembly (2), valve core one (3), valve core two (4), coil spring one (5), coil spring two (6) and coil spring three (7). The body (1) is provided with three chambers: adjustment chamber (8), air intake chamber one (9) and air intake chamber two (10); the three chambers are connected by a piston pipe (11); the central axis of the piston pipe (11) is a straight line; The body (1) is provided with two pipes: intake pipe one (12) and intake pipe two (13); one end of intake pipe one (12) is connected to intake chamber one (9), and the other end of intake pipe one (12) is connected to the outside. Compressed air from the outside flows into intake chamber one (9) from intake pipe one (12); one end of intake pipe two (13) is connected to intake chamber two (10), and the other end of intake pipe two (13) is connected to the outside. Compressed air from the outside flows into intake chamber two (10) from intake pipe two (13). The body (1) is provided with two pipes: an air outlet 1 (14) and an air outlet 2 (15); one end of the air outlet 1 (14) is connected to the air inlet 1 (9), and the other end of the air outlet 1 (14) is connected to the outside. The compressed air in the air inlet 1 (9) flows out to the outside through the air outlet 1 (14); one end of the air outlet 2 (15) is connected to the air inlet 2 (10), and the other end of the air outlet 2 (15) is connected to the outside. The compressed air in the air inlet 2 (10) flows out to the outside through the air outlet 2 (15). The valve core (3) is shaped like a dumbbell with a round rod in the middle and a large spherical crown and a small spherical crown at each end. The large spherical crown is called the valve stop and the small spherical crown is called the piston stop. The valve core (3) is located inside the intake chamber (9) and the central axis of the valve core (3) coincides with the central axis of the piston pipe (11). The valve core (3) can move linearly along the central axis of the piston pipe (11). After the valve core (3) moves to the designated position in the direction of the piston pipe (11), the valve stop will be blocked by the body (1), and this position is called valve one. The helical spring (5) presses the valve stop tightly against valve one. When the valve stop is at valve one, the outlet passage (14) is not connected to the intake chamber (9), and compressed air cannot flow from the intake chamber (9) to the outlet passage (14). The structure of valve core two (4) is the same as that of valve core one (3), and it is located inside the intake chamber two (10). The central axis of valve core two (4) coincides with the central axis of piston pipe (11). Valve core two (4) can move linearly along the central axis of piston pipe (11). After valve core two (4) moves to a designated position in the direction of piston pipe (11), the valve stop will be blocked by the body (1). This position is called valve two. The helical spring two (6) presses the valve stop tightly on valve two. When the valve stop is on valve two, the outlet passage two (15) is not connected to the intake chamber two (10), and compressed air cannot flow from the intake chamber two (10) to the outlet passage two (15). The piston assembly (2) includes a piston rod (16), a flexible sealing sheet (17), a sealing sheet fixing component one (18), and a sealing sheet fixing component two (19); the piston rod (16) is a round rod structure with a diameter smaller than that of the piston pipe (11); the flexible sealing sheet (17) is a thin sheet structure and is fixed to the piston rod (16) by the sealing sheet fixing component one (18) and the sealing sheet fixing component two (19); the relative positions of the piston rod (16) and the flexible sealing sheet (17) meet the following conditions: (1-1) The thickness direction of the flexible sealing sheet (17) is parallel to the central axis of the piston rod (16); (1-2) Take a plane perpendicular to the central axis of the piston rod (16). The projection of the flexible sealing sheet (17) on this plane completely blocks the projection of the piston rod (16) on this plane. (1-3) Select two end faces of the piston rod (16) that are perpendicular to the central axis, and place the flexible sealing sheet (17) between these two end faces; The flexible sealing sheet (17) is fixed inside the regulating cavity (8), dividing the regulating cavity (8) into two chambers: the IP chamber (20) and the back pressure chamber (21); the compressed air in the IP chamber (20) cannot flow to the back pressure chamber (21). The piston rod (16) is located inside the piston pipe (11) and can move linearly along the central axis of the piston pipe (11); after the piston rod (16) moves to the designated position in the direction close to the valve core (3), the sealing plate fixing part (18) will be blocked by the body (1), and this position is called the piston limit; the helical spring (7) presses the piston assembly (2) on the piston limit; The body (1) is provided with an IP air intake channel (22); one end of the IP air intake channel (22) is connected to the IP cavity (20), and the other end is connected to the outside. Compressed air flows into the IP cavity (20) from the IP air intake channel (22); the compressed air flowing into the IP air intake channel (22) is called regulating air, the compressed air flowing into the first air intake channel (12) and the second air intake channel (13) is called input air, the compressed air flowing out of the first air outlet channel (14) is called output air one, and the compressed air flowing out of the second air outlet channel (15) is called output air two. After the regulating air flows into the IP cavity (20) from the IP intake passage (22), the pressure inside the IP cavity (20) increases, the coil spring three (7) is compressed, and the piston rod (16) moves inside the piston passage (11), moving away from the intake cavity one (9) and closer to the intake cavity two (10); the piston stop of the valve core one (3) remains in contact with the piston rod (16), and the valve core one (3) moves closer to the valve one under the push of the coil spring one (5). The closer the valve core one (3) is to the valve one, the less compressed air flows into the exhaust passage one (14) from the intake cavity one (9); when the valve stop of the valve core one (3) reaches the valve one, the valve core one (3) moves. When the stopper disengages from the piston rod (16), the flow rate of compressed air from the intake chamber (9) into the outlet passage (14) reaches its minimum value; after the piston rod (16) contacts the piston stop of the valve core (4), the piston rod (16) pushes the piston stop of the valve core (4), causing the valve stop of the valve core (4) to move away from the valve, and compressed air flows from the intake chamber (10) into the outlet passage (15); the greater the distance between the valve core (4) and the valve, the more compressed air flows into the outlet passage (15); when the sealing plate fixing part (19) contacts the body (1), the flow of compressed air into the outlet passage (15) reaches its maximum value; Reducing the regulating air inside the IP cavity (20) decreases the pressure inside the IP cavity (20). The coil spring three (7) pushes the piston rod (16) closer to the intake cavity one (9) and away from the intake cavity two (10) through the sealing plate fixing part two (19). The piston stop of the valve core two (4) remains in contact with the piston rod (16). The valve stop of the valve core two (4) moves closer to the valve two under the push of the coil spring two (6). The closer the valve stop is to the valve two, the less compressed air flows from the intake cavity two (10) into the exhaust passage two (15). When the valve stop moves to the valve two, from the intake cavity two (10) into the exhaust passage two (15), the compressed air flows from the intake cavity two (10) into the exhaust passage two (15). When the compressed air flowing into the second intake chamber (10) and the second outlet passage (15) reaches its minimum value; after the piston stop of the valve core (3) comes into contact with the piston rod (16), the valve core (3) is pushed by the piston rod (16), causing the valve stop of the valve core (3) to move away from the valve, and the compressed air flows into the first outlet passage (14) from the first intake chamber (9); the farther the distance between the valve stop of the valve core (3) and the valve, the more compressed air flows into the first outlet passage (14); after the piston rod (16) moves to the piston limit, the compressed air flowing into the first outlet passage (14) reaches its maximum value; Gradually increase the regulating air inside the IP cavity (20), the pressure inside the IP cavity (20) gradually increases, the flow rate of the second output air of the second outlet (15) gradually increases to the maximum value, and the flow rate of the first output air of the first outlet (14) gradually decreases to the minimum value; gradually decrease the regulating air inside the IP cavity (20), the pressure inside the IP cavity (20) gradually decreases, the flow rate of the first output air of the first outlet (14) gradually increases to the maximum value, and the flow rate of the second output air of the second outlet (15) gradually decreases to the minimum value.

2. The double-acting piston-type pressure and flow amplifier according to claim 1, characterized in that: The first air intake (12) and the second air intake (13) are connected. The input air can flow into the first air intake chamber (9) and the second air intake chamber (10) simultaneously from the first air intake (12), or it can flow into the first air intake chamber (9) and the second air intake chamber (10) simultaneously from the second air intake (13).

3. The double-acting piston-type pressure-flow amplifier according to claim 1, characterized in that: A window is provided on the body (1) so that the back pressure chamber (21) is connected to the outside, and outside air can flow into the back pressure chamber (21) through the window; the sealing plate fixing part two (19) extends from the window to the outside of the body (1), that is, part of the sealing plate fixing part two (19) is located inside the adjustment chamber (8), and the other part is located outside the body (1) and is fixedly connected to the permanent magnet (23); the permanent magnet (23) moves together with the piston assembly (2).

4. A double-acting piston-type pressure-flow amplifier according to claim 1, characterized in that: The piston rod (16) is a hollow cylinder; the pipe inside the piston rod (16) is called the vent; the piston rod (16) is provided with a through hole, called the vent hole (24); the central axis of the vent hole (24) is perpendicular to and intersects the central axis of the piston rod (16); when the piston rod (16) moves in the piston pipe (11), the vent hole (24) is always located inside the back pressure chamber (21).

5. A double-acting piston-type pressure-flow amplifier according to claim 4, characterized in that: An annular sealing ring (25) is provided between the piston rod (16) and the piston pipe (11), so that compressed air cannot flow through the gap between the piston rod (16) and the piston pipe (11); When the piston stop of valve core one comes into contact with the piston rod (16), the piston stop of valve core two does not come into contact with the piston rod (16), and the back pressure chamber (21) and the outlet passage two (15) are connected through the vent hole (24) and the vent passage. When the piston stop of valve core 2 comes into contact with the piston rod (16), the piston stop of valve core 1 does not come into contact with the piston rod (16), and the back pressure chamber (21) and the outlet passage 1 (14) are connected through the vent hole (24) and the vent passage.

6. A double-acting piston-type pressure-flow amplifier according to claim 1, characterized in that: Observing along the central axis of the piston rod (16), the IP chamber (20) is located between the first intake chamber (9) and the second intake chamber (10).

7. A double-acting piston-type pressure-flow amplifier according to claim 1, characterized in that: The body (1) is equipped with a pressure stabilizing device; the pressure stabilizing device includes a spring plate (26), a flexible sealing plate (27) and a cover plate (28); the spring plate (26) and the flexible sealing plate (27) are both thin sheet structures, and the thickness direction of both is perpendicular to the central axis of the piston rod (16); the cover plate (28) presses the spring plate (26) and the flexible sealing plate (27) onto the body (1), so that a cavity is formed between the flexible sealing plate (27) and the body (1), which is called the pressure stabilizing cavity (29). The intake chamber 1 (9) is connected to the pressure stabilizing chamber (29), and the input air flows into the pressure stabilizing chamber (29) through the intake chamber 1 (9).

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