Single-action high-precision pressure flow amplifier

Abstract

The invention discloses a single-action high-precision pressure flow amplifier in the field of industrial flow control. The single-action high-precision pressure flow amplifier comprises a valve core, an air inlet cavity, an air outlet cavity, an adjusting cavity, an air inlet channel, an air outlet channel and an IP air channel. The air inlet channel communicates with the air inlet cavity, the air outlet cavity communicates with the air outlet channel, and the adjusting cavity communicates with the IP air channel. Adjusting air flows into the adjusting cavity from the IP air channel to push the flexible diaphragm to deform, the flexible diaphragm pushes the valve core to enable the air inlet cavity to be communicated with the air outlet cavity, and input air sequentially flows through the air inlet channel, the air inlet cavity, the air outlet cavity and the air outlet channel to become output air. A part of output air flows through the first pressure stabilizing device, a part of input air flows through the second pressure stabilizing device, and the pressure intensity of the output air is automatically stabilized at a preset value. The two pressure stabilizing devices are arranged, the pressure intensity of output air can be automatically adjusted, and the application range is wider.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial flow control, in particular to a single-acting high-precision pressure flow amplifier. BACKGROUND

[0002] Automatic regulating valve is an important part of industrial automation instrument, and the valve positioner as the main control accessory of the regulating valve can significantly improve the control characteristics of the valve, improve the control accuracy, action speed and flexibility. The pressure generated by the electrical conversion module in the valve positioner is generally 0.015-1.0kg / cm 2 , and the loop pressure of the pneumatic actuator of the positioner generally needs 1.4-7.0kg / cm 2 , so they need a pressure flow amplifier to coordinate. The pressure flow amplifier is also called pneumatic amplifier, which is essentially a micro-pressure control element, using a pressure signal with very low flow as an input control signal to obtain a pressure signal with high pressure and large flow capable of driving the pneumatic actuator.

[0003] The pressure flow amplifier can be divided into diaphragm type, diaphragm cutoff type, diaphragm slider type and diaphragm slide column type according to its structure, and can be divided into adjustable amplifier and non-adjustable amplifier according to the internal air resistance form of its structure, and can be divided into switch type amplifier and proportional type amplifier according to its performance. The diaphragm proportional amplifier is generally used in valve positioner.

[0004] The output air pressure of the traditional amplifier generally changes with the pressure of the adjusting air, which needs to be adjusted by the electrical conversion module (also called IP module), and the adjustment performance of the control system is required to be relatively high. SUMMARY

[0005] In view of the above problems existing in the prior art, the present application provides a single-acting high-precision pressure flow amplifier, which is provided with two pressure stabilizing devices, so that the pressure of the output air can be automatically adjusted, and the pressure of the output air is more stable, and can be applied to more application scenarios.

[0006] The technical scheme of the present application is as follows:

[0007] A single-acting high-precision pressure flow amplifier, comprising a body 1, a flexible diaphragm 2, a valve core 3, a gas discharge assembly 4, a spiral spring 5, and a spiral spring 6.

[0008] The body 1 is provided with three chambers: the air inlet chamber 7, the air outlet chamber 8 and the pressure regulating chamber; the air inlet chamber 7 and the air outlet chamber 8 are communicated through a through hole, which is called the valve pipe 9; the flexible diaphragm 2 is a sheet structure, which is arranged in the pressure regulating chamber and divides the pressure regulating chamber into two chambers: the regulating chamber 10 and the air release chamber 11; the compressed air in the regulating chamber 10 cannot flow to the air release chamber 11; when viewed along the central axis of the valve pipe 9, the arrangement order of the above-mentioned chambers is: the air inlet chamber 7, the air outlet chamber 8, the air release chamber 11, the regulating chamber 10;

[0009] The shape of the valve core 3 is dumbbell structure, the middle is a round rod, and the two ends are respectively called the valve stop 301 and the piston stop 302; the valve core 3 is arranged in the valve pipe 9, and the central axis of the valve core 3 coincides with the central axis of the valve pipe 9; the valve core 3 can move linearly along the central axis of the valve pipe 9; after the valve core 3 moves to a specified position in the direction of the air outlet chamber 8, the valve stop 301 is blocked by the body 1, and this position is called the valve one; the spiral spring 5 is arranged in the air outlet chamber 8 and presses the valve stop 301 tightly at the valve one; when the valve stop 301 stays at the valve one, the air inlet chamber 7 and the air outlet chamber 8 are not communicated, and the compressed air cannot flow from the air inlet chamber 7 to the air outlet chamber 8;

[0010] The body 1 is provided with six pipes: the air inlet pipe one 12, the air outlet pipe one 13, the air outlet pipe two 14 and the IP air inlet pipe 15; one end of the air inlet pipe one 12 is communicated with the air inlet chamber 7, and the other end of the air inlet pipe one 12 is communicated with the outside, and the compressed air from the outside flows into the air inlet chamber 7 through the air inlet pipe one 12; one end of the air outlet pipe one 13 is communicated with the air outlet chamber 8, and the other end of the air outlet pipe one 13 is communicated with the outside, and the compressed air in the air outlet chamber 8 flows out to the outside through the air outlet pipe one 13; one end of the air outlet pipe two 14 is communicated with the air release chamber 11, and the other end of the air outlet pipe two 14 is communicated with the outside, and the compressed air in the air release chamber 11 flows out to the outside through the air outlet pipe two 14; one end of the IP air inlet pipe 15 is communicated with the regulating chamber 10, and the other end is communicated with the outside, and the compressed air flows into the regulating chamber 10 through the IP air inlet pipe 15;

[0011] The compressed air flowing into the air inlet pipe one 12 is called input air; the compressed air flowing out from the air outlet pipe one 13 and the air outlet pipe two 14 is called output air; the compressed air flowing into the IP air inlet pipe 15 is called regulating air;

[0012] The air release assembly 4 is arranged in the air outlet chamber 8 and includes the flexible diaphragm two 16, the inner fixing part 17 and the outer fixing part 18; the shape of the inner fixing part 17 can be divided into a bottle cap and a cylinder, the annular part of the bottle cap is called the inner fixing part edge, the planar part of the bottle cap is called the inner fixing part end face, and the cylinder is called the air release passage 19; the outer wall of the air release passage 19 is provided with threads;

[0013] The inner fixing part end face has a circular hole, which is called the inner fixing part air release hole; the center axis of the inner fixing part air release hole coincides with the center axis of the inner fixing part edge, and the diameter of the inner fixing part air release hole is exactly equal to the inner diameter of the air release channel 19; one end face of the air release channel 19 is welded to the inner fixing part end face, and the center axis of the air release channel 19 coincides with the center axis of the inner fixing part air release hole;

[0014] The outer fixing part 18 is in the shape of a bottle cap, the annular part of the bottle cap is called the outer fixing part edge, and the planar part of the bottle cap is called the outer fixing part end face; the outer fixing part end face has a threaded hole, which is called the outer fixing part threaded hole; the center axis of the outer fixing part threaded hole coincides with the center axis of the outer fixing part edge, and the thread of the outer fixing part threaded hole exactly matches the thread of the air release channel 19; the outer fixing part edge is provided with a through hole, which is called the edge air release hole 20;

[0015] The flexible diaphragm 16 is a circular thin film with a hole in the center, which is called the flexible diaphragm air release hole; the diameter of the flexible diaphragm air release hole is equal to the outer diameter of the air release channel 19;

[0016] The flexible diaphragm 16, the inner fixing part 17 and the outer fixing part 18 are connected into an air release assembly under the following conditions:

[0017] (1-1) The air release channel 19 of the inner fixing part 17 penetrates the flexible diaphragm air release hole;

[0018] (1-2) The outer fixing part threaded hole is connected with the air release channel 19 through thread;

[0019] (1-3) Among the two surfaces of the flexible diaphragm 16 perpendicular to the thickness direction, the inner fixing part end face is in contact with one of the surfaces, and the outer fixing part end face is in contact with the other surface;

[0020] The air release assembly 4 is fixedly connected with the body 1 through the flexible diaphragm 16, so that the inner fixing part 17 is located between the valve core 3 and the flexible diaphragm 16, and the outer fixing part 17 is located between the flexible diaphragm 16 and the flexible diaphragm 2;

[0021] After adjusting air flows into the adjusting cavity 10 from the IP intake passage 15, the pressure inside the adjusting cavity 10 rises, the flexible diaphragm 2 deforms and pushes the outer fixing part 18 of the air release assembly 4, so that the air release assembly 4 moves towards the outlet cavity 8; after the inner fixing part 17 of the air release assembly 4 comes into contact with the piston block 302 of the valve core 3, the inner fixing part 17 pushes the valve core 3 to move towards the outlet cavity 8, the valve block 301 of the valve core 3 is away from the valve 1, and the compressed air inside the intake cavity 7 flows into the outlet cavity 8 and becomes output air; the higher the pressure inside the adjusting cavity 10, the farther the distance between the valve block 301 and the valve 1, and the more the output air;

[0022] When the adjusting air inside the adjusting cavity 10 is reduced, the pressure inside the adjusting cavity 10 is reduced, the valve core 3 moves towards the air inlet cavity 7, the valve stop 301 approaches the valve I, the compressed air flowing from the air inlet cavity 7 into the air outlet cavity 8 is reduced, and the output air is reduced; when the valve stop 301 moves to the rear of the valve I, the compressed air flowing from the air inlet cavity 7 into the air outlet cavity 8 reaches the minimum value; at the same time, the inner fixing part 17 of the air exhaust assembly 4 is out of contact with the piston stop 302 of the valve core 3, the compressed air of the air inlet cavity 7 flows into the inside of the inner fixing part 17, and flows into the air exhaust cavity 11 from the edge air exhaust hole 20, and finally is discharged to the outside.

[0023] Further, the body 1 is provided with a pressure stabilizing device one 21, a flexible diaphragm three 22, a spiral spring three 23 and an air outlet three 24;

[0024] The pressure stabilizing device one 21 comprises a shell 25, an air needle 26 and a spiral spring four 27; the outer wall of the shell 25 is a cylindrical structure, and the inside is provided with an air inlet hole 28, a pressure stabilizing cavity 29, an air needle pipeline 30 and an air exhaust hole 31; the air inlet hole 28, the pressure stabilizing cavity 29, the air needle pipeline 30 and the air exhaust hole 31 are communicated, and the air exhaust hole 31 is communicated with the air outlet three 24, and the compressed air can flow from the air inlet hole 28 into the pressure stabilizing cavity 29, and then sequentially flow from the pressure stabilizing cavity 29 into the air needle pipeline 30, the air exhaust hole 31 and the air outlet three 24; the air outlet three 24 is communicated with the outside, and the compressed air inside the air outlet three 24 can flow out to the outside;

[0025] The air needle 26 has a T-shaped structure, and the T-shaped structure can be obtained by rotating around the symmetry axis of the air needle 26 for one turn; the air needle 26 is divided into two parts according to the diameter: a top needle 2601 and a hole stop 2602, wherein the diameter of the top needle 2601 is smaller than the diameter of the hole stop 2602;

[0026] The diameter of the air needle 26 is smaller than the diameter of the air needle pipeline 30; the air needle 26 is arranged inside the air needle pipeline 30 and can do linear reciprocating motion inside the air needle pipeline 30; the top needle 2601 is inside the pressure stabilizing cavity 29;

[0027] The spiral spring four 26 is arranged inside the pressure stabilizing cavity 29, one end of the spiral spring four 26 is in contact with the shell 25, the other end is in contact with the hole stop 2602, and the hole stop 2602 is pushed towards the air needle pipeline 30 until the hole stop 2602 is in contact with the shell 25; when the hole stop 2602 is in contact with the shell 25, the end of the top needle 2601 is exposed outside the shell 25;

[0028] One end of the spiral spring three 23 is in contact with the body 1, the other end is in contact with the flexible diaphragm three 22, and the flexible diaphragm three 22 is pushed towards the pressure stabilizing device one 21, so that the flexible diaphragm three 22 is in contact with the end of the top needle 2601;

[0029] When the compressed air flowing into the pressure stabilizing cavity 29 from the air inlet hole 28 is less, the pressure inside the pressure stabilizing cavity 29 is relatively low, the flexible diaphragm three 22 is in contact with the pressure stabilizing device one 21 under the pushing of the helical spring three 23; the thimble 2601 is pushed by the flexible diaphragm three 22, so that the hole stop 2602 is away from the shell 25, and the compressed air in the pressure stabilizing cavity 29 flows into the air release hole 31 from the gap between the thimble 2601 and the air needle duct 30;

[0030] When the compressed air flowing into the pressure stabilizing cavity 29 from the air inlet hole 28 is less, the pressure inside the pressure stabilizing cavity 29 is relatively low, the flexible diaphragm three 22 is in contact with the pressure stabilizing device one 21 under the pushing of the helical spring three 23; the thimble 2601 is pushed by the flexible diaphragm three 22, so that the hole stop 2602 is away from the shell 25, and the compressed air in the pressure stabilizing cavity 29 flows into the air release hole 31 from the gap between the thimble 2601 and the air needle duct 30;

[0031] Further, the air outlet one 13 is communicated with the air inlet hole 28 of the pressure stabilizing device one 21.

[0032] Further, the shell 1 is provided with a pressure stabilizing device two 32, a flexible diaphragm four 33, a helical spring five 34 and an air outlet four 35; the structure, relative position and function of the pressure stabilizing device two 32, the flexible diaphragm four 33, the helical spring five 34 and the air outlet four 35 are the same as those of the pressure stabilizing device one 21, the flexible diaphragm four 33, the helical spring three 23 and the air outlet three 24.

[0033] The shell 1 is provided with an air inlet two 36; one end of the air inlet two 36 is communicated with the outside, and the other end is communicated with the air inlet hole of the pressure stabilizing device two 32, so that the compressed air can flow into the inside of the pressure stabilizing device two 32 from the air inlet two 36.

[0034] Further, the air inlet one 12 is communicated with the air inlet two 36.

[0035] The beneficial technical effects of the present application are as follows:

[0036] Compared with the prior art which mainly relies on an electrical conversion module (also referred to as an IP module) to adjust the output air pressure, the present application is provided with two pressure stabilizing devices, which can automatically adjust the pressure of the output air, so that the pressure of the output air is more stable, and the control precision is also higher. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is an appearance view of an embodiment;

[0038] Figure 2 is a sectional view of an embodiment;

[0039] Figure 3is a structural diagram of the pressure stabilizing device;

[0040] Figure 4 is a structural diagram of the air release assembly.

[0041] In the figure, the correspondence between the component names and the figure numbers is as follows: 1, body; 2, flexible diaphragm 1; 3, valve core; 4, air release assembly; 5, coil spring 1; 6, coil spring 2; 7, air inlet cavity; 8, air outlet cavity; 9, valve conduit; 10, regulating cavity; 11, air release cavity; 12, air inlet passage 1; 13, air outlet passage 1; 14, air outlet passage 2; 15, IP air inlet passage; 16, flexible diaphragm 2; 17, inner fixing part; 18, outer fixing part; 19, air release passage; 20, edge air release hole; 21, pressure stabilizing device 1; 22, flexible diaphragm 3; 23, coil spring 3; 24, air outlet passage 3; 25, housing; 26, air needle; 27, coil spring 4; 28, air inlet hole; 29, pressure stabilizing cavity; 30, air needle conduit; 31, air release hole; 32, pressure stabilizing device 2; 33, flexible diaphragm 4; 34, coil spring 5; 35, air outlet passage 4; 36, air inlet passage 2; 301, valve stop of the valve core; 302, piston stop of the valve core; 2601, thimble of the air needle; 2602, hole stop of the air needle. DETAILED DESCRIPTION

[0042] The application will be described in greater detail below with reference to the drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0043] The structure of the embodiment is shown in Figures 1 to 4 which mainly comprises a body 1, a flexible diaphragm 1 2, a valve core 3, an air release assembly 4, a coil spring 1 5, and a coil spring 2 6.

[0044] The body 1 is provided with three cavities: an air inlet cavity 7, an air outlet cavity 8, and a pressure regulating cavity. The air inlet cavity 7 and the air outlet cavity 8 are communicated through a through hole, which is referred to as a valve conduit 9. The flexible diaphragm 1 2 is in a sheet structure and is arranged inside the pressure regulating cavity, which divides the pressure regulating cavity into two cavities: a regulating cavity 1 0 and an air release cavity 1 1, and the compressed air inside the regulating cavity 1 0 cannot flow to the air release cavity 1 1. When observed along the central axis of the valve conduit 9, the arrangement order of the above-mentioned cavities is: the air inlet cavity 7, the air outlet cavity 8, the air release cavity 1 1, and the regulating cavity 1 0.

[0045] The shape of the valve core 3 is dumbbell structure, the middle is a round rod, and the two ends are called valve stop 301 and piston stop 302 respectively. The valve core 3 is arranged inside the valve pipe 9, and the central axis of the valve core 3 coincides with the central axis of the valve pipe 9. The valve core 3 can move linearly along the central axis of the valve pipe 9. After the valve core 3 moves to a specified position in the direction of the outlet cavity 8, the valve stop 301 is blocked by the body 1, and this position is called valve one. The coil spring one 5 is arranged inside the outlet cavity 8 and presses the valve stop 301 tightly at the valve one. When the valve stop 301 stays at the valve one, the inlet cavity 7 and the outlet cavity 8 are not communicated, and the compressed air cannot flow from the inlet cavity 7 to the outlet cavity 8.

[0046] The body 1 is provided with six pipes: inlet passage one 12, outlet passage one 13, outlet passage two 14 and IP inlet passage 15. One end of the inlet passage one 12 communicates with the inlet cavity 7, and the other end of the inlet passage one 12 communicates with the outside, so that the compressed air in the outside can flow into the inlet cavity 7 through the inlet passage one 12; one end of the outlet passage one 13 communicates with the outlet cavity 8, and the other end of the outlet passage one 13 communicates with the outside, so that the compressed air in the outlet cavity 8 can flow out to the outside through the outlet passage one 13; one end of the outlet passage two 14 communicates with the exhaust cavity 11, and the other end of the outlet passage two 14 communicates with the outside, so that the compressed air in the exhaust cavity 11 can flow out to the outside through the outlet passage two 14; one end of the IP inlet passage 15 communicates with the adjusting cavity 10, and the other end of the IP inlet passage 15 communicates with the outside, so that the compressed air can flow into the adjusting cavity 10 through the IP inlet passage 15.

[0047] The compressed air flowing into the inlet passage one 12 is called input air, the compressed air flowing out of the outlet passage one 12 is called output air, and the compressed air flowing into the IP inlet passage 154 is called adjusting air.

[0048] The structure of the exhaust assembly 4 is shown in Figure 4 The exhaust assembly 4 is arranged inside the outlet cavity 8 and includes a flexible diaphragm two 16, an inner fixing part 17 and an outer fixing part 18. The shape of the inner fixing part 17 can be divided into a bottle cap and a cylinder, the annular part of the bottle cap is called the inner fixing part edge, the plane part of the bottle cap is called the inner fixing part end face, and the cylinder is called the exhaust passage 19. The outer wall of the exhaust passage 19 is threaded.

[0049] There is a circular hole on the inner fixing part end face, which is called the inner fixing part exhaust hole. The central axis of the inner fixing part exhaust hole coincides with the central axis of the inner fixing part edge, and the diameter of the inner fixing part exhaust hole is equal to the inner diameter of the exhaust passage 19. One end face of the exhaust passage 19 is welded to the inner fixing part end face, and the central axis of the exhaust passage 19 coincides with the central axis of the inner fixing part exhaust hole.

[0050] The outer fastener 18 is shaped like a bottle cap. The annular portion of the bottle cap is called the edge of the outer fastener, and the flat portion of the bottle cap is called the end face of the outer fastener. The end face of the outer fastener has a threaded hole, called the threaded hole of the outer fastener. The central axis of the threaded hole of the outer fastener coincides with the central axis of the edge of the outer fastener, and the thread of the threaded hole of the outer fastener matches the thread of the venting channel 19. A through hole is provided on the edge of the outer fastener, called the edge venting hole 20.

[0051] Flexible diaphragm 16 is a circular thin film with a central hole, called the flexible diaphragm vent hole. The diameter of the flexible diaphragm vent hole is equal to the outer diameter of the vent channel 19.

[0052] Flexible diaphragm 16, inner fixing member 17, and outer fixing member 18 are connected to form a venting assembly according to the following conditions:

[0053] (1-1) The venting channel 19 of the internal fixation member 17 passes through the venting hole of the flexible diaphragm;

[0054] (1-2) The threaded hole of the external fastener is connected to the venting channel 19 by a thread;

[0055] (1-3) In the two surfaces of the flexible diaphragm 16 that are perpendicular to the thickness direction, the end face of the inner fastener is in contact with one of the surfaces, and the end face of the outer fastener is in contact with the other surface.

[0056] The venting assembly 4 is fixedly connected to the body 1 via the second flexible diaphragm 16, such that the inner fixing member 17 is located between the valve core 3 and the second flexible diaphragm 16, and the outer fixing member 18 is located between the second flexible diaphragm 16 and the first flexible diaphragm 2.

[0057] The pressure of the output air generally changes with the pressure of the regulating air, and needs to be adjusted through an electrical conversion module. Therefore, the adjustment performance of the control system is relatively high. In order to make the output air pressure more stable, a pressure stabilizing device 21, a flexible diaphragm 22, a helical spring 23, and an air outlet duct 24 are installed on the machine body 1.

[0058] The structure of voltage regulator 21 is as follows Figure 3 As shown, the device includes a housing 25, an air needle 26, and a coil spring 27. The outer wall of the housing 25 is cylindrical, and its interior is provided with an air inlet 28, a pressure stabilizing chamber 29, an air needle pipe 30, and an air vent 31. The air inlet 28, pressure stabilizing chamber 29, air needle pipe 30, and air vent 31 are interconnected, and the air vent 31 is connected to the air outlet 24. Compressed air can flow from the air inlet 28 into the pressure stabilizing chamber 29, and then from the pressure stabilizing chamber 29 into the air needle pipe 30, the air vent 31, and the air outlet 24 in sequence. The air outlet 24 is connected to the outside, and the compressed air inside the air outlet 24 can flow out to the outside.

[0059] The cross-sectional view of the air needle 26 shows a T-shaped structure, which can be obtained by rotating the T-shaped structure around its own axis of symmetry. The air needle 26 is divided into two parts according to their diameter: the ejector pin 2601 and the hole stop 2602, wherein the diameter of the ejector pin 2601 is smaller than the diameter of the hole stop 2602.

[0060] The diameter of the air needle 26 is smaller than the diameter of the air needle pipe 30. The air needle 26 is located inside the air needle pipe 30 and can perform linear reciprocating motion inside the air needle pipe 30. The ejector pin 2601 is located inside the pressure stabilizing chamber 29.

[0061] A helical spring 26 is disposed inside the pressure stabilizing chamber 29. One end of the helical spring 26 contacts the housing 25, and the other end contacts the orifice 2602, pushing the orifice 2602 toward the air needle pipe 30 until the orifice 2602 contacts the housing 25. When the orifice 2602 contacts the housing 25, the end of the ejector pin 2601 is exposed outside the housing 25.

[0062] One end of the helical spring 23 contacts the body 1, and the other end contacts the flexible diaphragm 22, pushing the flexible diaphragm 22 towards the voltage stabilizing device 21, so that the flexible diaphragm 22 contacts the end of the ejector pin 2601.

[0063] The air outlet 13 is connected to the air inlet 28 of the pressure regulator 21. Therefore, a portion of the output air from the air outlet 13 will flow into the interior of the pressure regulator 21 from the air inlet 28 and finally flow out from the vent 31.

[0064] The working principle of voltage regulator 21 is as follows:

[0065] When the amount of compressed air flowing into the pressure stabilizing chamber 29 from the air inlet 28 is relatively small, the pressure inside the pressure stabilizing chamber 29 is relatively low. Under the push of the helical spring 23, the flexible diaphragm 22 comes into contact with the pressure stabilizing device 21. The ejector pin 2601 is pushed by the flexible diaphragm 22, causing the hole stop 2602 to move away from the housing 25. The compressed air in the pressure stabilizing chamber 29 flows into the vent hole 31 from the gap between the ejector pin 2601 and the air needle pipe 30.

[0066] As the amount of compressed air flowing into the pressure-stabilizing chamber 29 from the air inlet 28 increases, the pressure inside the pressure-stabilizing chamber 29 also increases. Under the combined action of the compressed air and the coil spring 23, the flexible diaphragm 22 moves away from the housing 25. The ejector pin 2601 remains in contact with the flexible diaphragm 22 under the push of the coil spring 27. Therefore, the hole stop 2602 moves towards the vent hole 31. The closer the hole stop 2602 is to the housing 25, the less compressed air flows into the vent hole 31 from the pressure-stabilizing chamber 29.

[0067] To provide more stable output air pressure, this embodiment directly supplies the input air to the pressure stabilizing device. The body 1 is equipped with a second pressure stabilizing device 32, a fourth flexible diaphragm 33, a fifth helical spring 34, and a fourth air outlet 35. The structure, relative position, and function of the second pressure stabilizing device 32, the fourth flexible diaphragm 33, the fifth helical spring 34, and the fourth air outlet 35 are the same as those of the first pressure stabilizing device 21, the fourth flexible diaphragm 33, the third helical spring 23, and the third air outlet 24. The body 1 is equipped with a second air inlet 36, one end of which connects to the outside, and the other end connects to the air inlet of the second pressure stabilizing device 32. Input air can flow into the interior of the second pressure stabilizing device 32 from the second air inlet 36. After flowing through the second pressure stabilizing device 32, the input air becomes output air with more stable pressure and flows out from the fourth air outlet 35.

[0068] The working principle of the embodiment is as follows:

[0069] After the regulated air flows into the regulating chamber 10 from the IP intake passage 15, the pressure inside the regulating chamber 10 increases. The flexible diaphragm 2 deforms and pushes the outer fixing member 18 of the venting assembly 4, causing the venting assembly 4 to move towards the outlet chamber 8. After the inner fixing member 17 of the venting assembly 4 contacts the piston stop 302 of the valve core 3, the inner fixing member 17 pushes the valve core 3 towards the outlet chamber 8. The valve stop 301 of the valve core 3 moves away from the valve, and the compressed air inside the intake chamber 7 flows into the outlet chamber 8 and into the outlet passage 13 to become output air. The higher the pressure inside the regulating chamber 10, the farther the valve stop 301 is from the valve, and the more output air there is.

[0070] The pressure inside the regulating chamber 10 decreases as the regulating air is reduced, causing the valve core 3 to move towards the intake chamber 7. The valve stop 301 moves closer to valve one, reducing the amount of compressed air flowing from the intake chamber 7 into the exhaust chamber 8 and thus reducing the output air. When the valve stop 301 moves to valve one, the amount of compressed air flowing from the intake chamber 7 into the exhaust chamber 8 reaches its minimum. At the same time, the inner fixing member 17 of the venting assembly 4 disengages from the piston stop 302 of the valve core 3, and the compressed air in the intake chamber 7 flows into the interior of the inner fixing member 17 and into the venting chamber 11 from the edge venting hole 20, and is finally discharged to the outside.

[0071] Although the embodiments of the present invention 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 the present invention. 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 the present invention. Therefore, the present invention is not limited to the specific details without departing from the general concept defined by the claims and their equivalents.

Claims

1. A single-acting high-precision pressure-flow amplifier, characterized in that: Includes body (1), flexible diaphragm one (2), valve core (3), venting assembly (4), coil spring one (5), and coil spring two (6); The body (1) is provided with three chambers: an air inlet chamber (7), an air outlet chamber (8), and a pressure regulating chamber; the air inlet chamber (7) and the air outlet chamber (8) are connected by a through hole, which is called the valve pipe (9); the flexible diaphragm (2) is a thin sheet structure and is set inside the pressure regulating chamber, dividing the pressure regulating chamber into two chambers: a regulating chamber (10) and a venting chamber (11); the compressed air inside the regulating chamber (10) cannot flow to the venting chamber (11); when observed along the central axis of the valve pipe (9), the arrangement order of the above chambers is: air inlet chamber (7), air outlet chamber (8), venting chamber (11), regulating chamber (10); The valve core (3) is shaped like a dumbbell with a round rod in the middle and two ends called valve stop (301) and piston stop (302) respectively. The valve core (3) is located inside the valve pipe (9), and the central axis of the valve core (3) coincides with the central axis of the valve pipe (9). The valve core (3) can move linearly along the central axis of the valve pipe (9). After the valve core (3) moves to the designated position in the direction of the outlet chamber (8), the valve stop (301) will be blocked by the body (1), and this position is called valve one. The helical spring one (5) is located inside the outlet chamber (8) and presses the valve stop (301) against valve one. When the valve stop (301) stays at valve one, the intake chamber (7) and the outlet chamber (8) are not connected, and compressed air cannot flow from the intake chamber (7) to the outlet chamber (8). The body (1) is provided with 6 pipes: air inlet duct 1 (12), air outlet duct 1 (13), air outlet duct 2 (14), and IP air inlet duct (15); one end of air inlet duct 1 (12) is connected to the air inlet chamber (7), and the other end of air inlet duct 1 (12) is connected to the outside, and compressed air from the outside flows into the air inlet chamber (7) from air inlet duct 1 (12); one end of air outlet duct 1 (13) is connected to the air outlet chamber (8), and the other end of air outlet duct 1 (13) is connected to the outside. The compressed air in the exhaust chamber (8) flows out to the outside through the exhaust passage one (13); one end of the exhaust passage two (14) is connected to the venting chamber (11), and the other end of the exhaust passage two (14) is connected to the outside, so the compressed air in the venting chamber (11) flows out to the outside through the exhaust passage two (14); one end of the IP intake passage (15) is connected to the regulating chamber (10), and the other end is connected to the outside, so the compressed air flows into the regulating chamber (10) from the IP intake passage (15); The compressed air flowing into the intake duct (12) is called input air; the compressed air flowing out of the exhaust duct (13) and the exhaust duct (14) is called output air; the compressed air flowing into the IP intake duct (15) is called regulating air. The venting assembly (4) is disposed inside the venting chamber (8) and includes a flexible diaphragm (16), an inner fixing member (17), and an outer fixing member (18). The inner fixing member (17) can be divided into a bottle cap and a cylinder. The annular part of the bottle cap is called the edge of the inner fixing member, the planar part of the bottle cap is called the end face of the inner fixing member, and the cylinder is called the venting channel (19). The outer wall of the venting channel (19) has threads. There is a round hole on the end face of the internal fixation component, which is called the vent hole of the internal fixation component; the central axis of the vent hole of the internal fixation component coincides with the central axis of the edge of the internal fixation component, and the diameter of the vent hole of the internal fixation component is exactly equal to the inner diameter of the venting channel (19); one end face of the venting channel (19) is welded to the end face of the internal fixation component, and the central axis of the venting channel (19) coincides with the central axis of the vent hole of the internal fixation component. The outer fixing member (18) is shaped like a bottle cap. The annular part of the bottle cap is called the edge of the outer fixing member, and the flat part of the bottle cap is called the end face of the outer fixing member. There is a threaded hole on the end face of the outer fixing member, which is called the threaded hole of the outer fixing member. The central axis of the threaded hole of the outer fixing member coincides with the central axis of the edge of the outer fixing member, and the thread of the threaded hole of the outer fixing member matches the thread of the venting channel (19). A through hole is provided on the edge of the outer fixing member, which is called the edge venting hole (20). The flexible diaphragm (16) is a circular thin film with a hole in the center, which is called the flexible diaphragm vent hole; the diameter of the flexible diaphragm vent hole is equal to the outer diameter of the vent channel (19); The flexible diaphragm (16), the inner fixing member (17), and the outer fixing member (18) are connected to form a venting assembly according to the following conditions: (1-1) The venting channel (19) of the internal fixation member (17) passes through the venting hole of the flexible diaphragm; (1-2) The threaded hole of the external fastener is connected to the venting channel (19) by a thread; (1-3) In the two surfaces of the flexible diaphragm (16) perpendicular to the thickness direction, the end face of the inner fastener contacts one of the surfaces and the end face of the outer fastener contacts the other surface. The venting assembly (4) is fixedly connected to the body (1) via the second flexible diaphragm (16), such that the inner fixing member (17) is located between the valve core (3) and the second flexible diaphragm (16), and the outer fixing member (17) is located between the second flexible diaphragm (16) and the first flexible diaphragm (2). After the regulating air flows into the regulating chamber (10) from the IP intake passage (15), the pressure inside the regulating chamber (10) increases, the flexible diaphragm (2) deforms and pushes the outer fixing part (18) of the venting assembly (4), causing the venting assembly (4) to move towards the outlet chamber (8); after the inner fixing part (17) of the venting assembly (4) contacts the piston stop (302) of the valve core (3), the inner fixing part (17) pushes the valve core (3) towards the outlet chamber (8), the valve stop (301) of the valve core (3) moves away from the valve, and the compressed air inside the intake chamber (7) flows into the outlet chamber (8) and into the outlet passage (13) to become the output air; the higher the pressure inside the regulating chamber (10), the farther the distance between the valve stop (301) and the valve, and the more output air; The pressure inside the regulating chamber (10) decreases as the regulating air is reduced. The valve core (3) moves toward the intake chamber (7), and the valve stop (301) moves closer to valve one. The amount of compressed air flowing from the intake chamber (7) into the exhaust chamber (8) decreases, and the output air decreases. When the valve stop (301) moves to valve one, the amount of compressed air flowing from the intake chamber (7) into the exhaust chamber (8) reaches a minimum. At the same time, the inner fixing member (17) of the venting assembly (4) disengages from the piston stop (302) of the valve core (3). The compressed air in the intake chamber (7) flows into the interior of the inner fixing member (17) and into the venting chamber (11) from the edge venting hole (20), and is finally discharged to the outside.

2. The single-acting high-precision pressure and flow amplifier according to claim 1, characterized in that: The body (1) is equipped with a pressure stabilizing device (21), a flexible diaphragm (22), a helical spring (23), and an air outlet (24); The pressure stabilizing device (21) includes a housing (25), an air needle (26), and a helical spring (27). The outer wall of the housing (25) is cylindrical, and the interior is provided with an air inlet (28), a pressure stabilizing chamber (29), an air needle pipe (30), and an air outlet (31). The air inlet (28), the pressure stabilizing chamber (29), the air needle pipe (30), and the air outlet (31) are connected, and the air outlet (31) is connected to the air outlet channel (24). Compressed air can flow from the air inlet (28) into the pressure stabilizing chamber (29), and then from the pressure stabilizing chamber (29) into the air needle pipe (30), the air outlet (31), and the air outlet channel (24) in sequence. The air outlet channel (24) is connected to the outside, and the compressed air inside the air outlet channel (24) can flow out to the outside. The cross-sectional view of the air needle (26) is a T-shaped structure. The air needle (26) can be obtained by rotating the T-shaped structure around its own axis of symmetry. The air needle (26) is divided into two parts according to the different diameters: the ejector pin (2601) and the hole stop (2602), wherein the diameter of the ejector pin (2601) is smaller than the diameter of the hole stop (2602). The diameter of the air needle (26) is smaller than the diameter of the air needle pipe (30); the air needle (26) is located inside the air needle pipe (30) and can make linear reciprocating motion inside the air needle pipe (30); the ejector pin (2601) is inside the pressure stabilizing chamber (29); The helical spring four (26) is installed inside the pressure stabilizing chamber (29). One end of the helical spring four (26) is in contact with the housing (25), and the other end is in contact with the hole stop (2602). The hole stop (2602) is pushed towards the air needle pipe (30) until the hole stop (2602) contacts the housing (25). When the hole stop (2602) contacts the housing (25), the end of the ejector pin (2601) is exposed outside the housing (25). One end of the helical spring three (23) is in contact with the body (1), and the other end is in contact with the flexible diaphragm three (22), and pushes the flexible diaphragm three (22) towards the voltage stabilizing device one (21), so that the flexible diaphragm three (22) comes into contact with the end of the ejector pin (2601); When less compressed air flows into the pressure stabilizing chamber (29) from the air inlet (28), the pressure inside the pressure stabilizing chamber (29) is relatively low. The flexible diaphragm three (22) is pushed by the helical spring three (23) and comes into contact with the pressure stabilizing device one (21). The ejector pin (2601) is pushed by the flexible diaphragm three (22), causing the hole stop (2602) to move away from the housing (25). The compressed air in the pressure stabilizing chamber (29) flows into the vent hole (31) from the gap between the ejector pin (2601) and the air needle pipe (30). As the amount of compressed air flowing into the pressure stabilizing chamber (29) from the air inlet (28) increases, the pressure inside the pressure stabilizing chamber (29) also increases. Under the combined action of the compressed air and the coil spring (23), the flexible diaphragm (22) moves away from the housing (25). The ejector pin (2601) remains in contact with the flexible diaphragm (22) under the push of the coil spring (27), so the hole stop (2602) moves closer to the housing (25). The closer the hole stop (2602) is to the housing (25), the less compressed air flows into the vent hole (31) from the pressure stabilizing chamber (29).

3. A single-acting high-precision pressure and flow amplifier according to claim 2, characterized in that, The air outlet (13) is connected to the air inlet (28) of the pressure stabilizing device (21).

4. A single-acting high-precision pressure and flow amplifier according to claim 2, characterized in that: The body (1) is provided with a second pressure stabilizing device (32), a fourth flexible diaphragm (33), a fifth helical spring (34), and a fourth air outlet (35); the structure, relative position, and function of the second pressure stabilizing device (32), the fourth flexible diaphragm (33), the fifth helical spring (34), and the fourth air outlet (35) are the same as those of the first pressure stabilizing device (21), the fourth flexible diaphragm (33), the third helical spring (23), and the third air outlet (24); The body (1) is provided with an air intake duct two (36); one end of the air intake duct two (36) is connected to the outside, and the other end is connected to the air intake hole of the pressure stabilizing device two (32), and compressed air can flow into the interior of the pressure stabilizing device two (32) from the air intake duct two (36).

5. A single-acting high-precision pressure-flow amplifier according to claim 2, characterized in that, The first air intake (12) and the second air intake (36) are connected.

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