A pneumatic pressure controller

Abstract

The present application discloses a pneumatic pressure controller, including: a calculation module, a setting module, and an input-output module. The calculation module is connected to the setting module gas circuit, used for inputting working gas source, setting pressure, receiving pressure, and needle valve switch pressure, performing proportional integral calculation through a number of wave springs, outputting the control pressure after calculation, and realizing positive or negative control; the setting module is connected to the calculation module and the input-output module gas circuit respectively, used for realizing the switching between manual control mode and automatic control mode by changing the gas flow direction, and at the same time, through manual pressure adjustment, providing the setting pressure in the automatic control mode and providing the output pressure of the controller in the manual control mode; the input-output module is connected to the setting module gas circuit, used for collecting the air cushion chamber pressure and the external setting pressure, introducing the external gas source, providing the gas consumption of the controller function, and at the same time, outputting the control pressure of the controller. The present application has a simple structure, low cost and low failure rate.

Description

Technical Field

[0001] The present application relates to the technical field of air pressure control, and in particular, to a pneumatic pressure controller. Background Art

[0002] The automatic pressure-maintaining system is an important system for slurry and earth pressure shield machines. It adjusts the support pressure by automatically adjusting the pressure of the air cushion chamber, stabilizes the excavation surface, and ensures the safety of shield construction. The core component of the automatic pressure-maintaining system is the pneumatic pressure controller, which realizes PID control of the air cushion chamber pressure through mechanical and pneumatic theories. It can set the corresponding pressure according to the required support pressure, and control the opening and closing of the ventilation valve through automatic calculation output control signals, thereby controlling the air cushion chamber pressure to make it consistent with the set pressure.

[0003] Existing pneumatic pressure controllers are usually divided into three parts: signal input and output module, pressure calculation module, and pressure setting module. The functions usually include automatic / manual control, local / remote setting, positive / reverse control, etc. The numerous modules and functions result in a large controller size, complex internal gas circuits, many parts, redundant design, high processing and manufacturing costs, complex assembly, high failure rate, and difficult maintenance. Therefore, optimizing the gas circuit design of the controller, simplifying the structure and assembly process, and reducing the size, cost, and failure rate are important research directions. Summary of the invention

[0004] The embodiment of the present application provides a pneumatic pressure controller to solve the technical problems of the existing pneumatic pressure controllers having complex structures, high costs and high failure rates.

[0005] The technical solutions adopted in this application are as follows:

[0006] A pneumatic pressure controller, comprising: a calculation module, a setting module, an input and output module,

[0007] The operation module is connected to the setting module gas circuit, and is used for inputting the working gas source, setting pressure, receiving pressure, and needle valve switch pressure, performing proportional integral operation through a plurality of wave springs, outputting the control pressure after the operation, and realizing positive or negative control;

[0008] The setting module is connected to the gas circuits of the operation module and the input / output module respectively, and is used to switch between the manual control mode and the automatic control mode by changing the gas flow direction, and at the same time, by manually adjusting the pressure, provides the set pressure in the automatic control mode and provides the output pressure of the controller in the manual control mode;

[0009] The input-output module is connected to the setting module gas circuit, and is used to collect the air cushion chamber pressure and the external setting pressure, introduce the external air source, provide the controller function gas consumption, and at the same time, output the control pressure of the controller.

[0010] Furthermore, the input-output module is also used to: lead out the controller set pressure for remote display.

[0011] Furthermore, the input-output module includes a second external set pressure interface, a fourth gas source pressure interface, a fourth set pressure interface, a second controller output pressure interface, and a fourth receiving pressure interface, wherein the second external set pressure interface is used to receive the pressure in the external set pressure controller as automatic control, and when the control pressure is set from inside the controller, the input is closed; the fourth gas source pressure interface is used to receive the gas source pressure to provide functional gas for various components of the controller; the fourth set pressure interface is used to output the automatic control pressure set by the controller; the second controller output pressure interface is used to output the controller output pressure by controlling the opening and closing of the valve and the opening; the fourth receiving pressure interface is used to receive the air cushion tank pressure that has been linearly transmitted for feedback calculation.

[0012] Further, the setting module includes: a second gas source pressure interface, a second receiving pressure interface, a second conversion device; a manual pressure regulating mechanism, a feedback diaphragm, a second amplifier, a second throttle hole, a second setting pressure interface; a second operation output pressure interface, a third receiving pressure interface, a needle valve switch pressure interface, a first external setting pressure interface, a third gas source pressure interface, a first setting pressure interface; a first controller output pressure interface, a rotation switching device, wherein:

[0013] The first external set pressure interface is connected to the second external set pressure interface, and one way is connected to an input end of the second conversion device, one way of the output end of the second conversion device is connected to the second set pressure interface, and the other way is connected to the third set pressure interface, and the other input end of the second conversion device is connected to an output end of the rotation switching device;

[0014] The third gas source pressure interface is connected to the fourth gas source pressure interface, and is connected to the second gas source pressure interface, one of the input ends of the rotary switching device, the gas source cavity of the second amplifier, the second throttle hole and the manual pressure regulating mechanism. A pipeline is connected to the input cavity of the second amplifier by a pipeline between the second throttle hole and the manual pressure regulating mechanism. The output cavity of the second amplifier linearly outputs an output pressure according to the input cavity pressure, which is fed back to the feedback diaphragm and the other input end of the rotary switching device respectively.

[0015] The third set pressure interface is connected to the fourth set pressure interface;

[0016] The first controller output pressure interface is connected to the second controller output pressure interface and is also connected to the other output end of the rotation switching device;

[0017] The second receiving pressure interface is connected to the fourth receiving pressure interface and is also connected to the third receiving pressure interface;

[0018] The second operation output pressure interface is connected to the other input end of the rotation switching device;

[0019] The needle valve switch pressure interface is connected to the other output end of the rotary switching device.

[0020] Further, the rotary switching device includes an eighth air port, a ninth air port, a tenth air port, an eleventh air port, a twelfth air port, a thirteenth air port, a fourteenth air port, a fifteenth air port, and a sixteenth air port, the ninth air port is connected to the second amplifier and the feedback diaphragm, the tenth air port is connected to the fifteenth air port, the eighth air port is connected to the needle valve switch pressure interface, the twelfth air port is connected to the second air source pressure interface and the first air source pressure interface, and the thirteenth air port is connected to the second operation output pressure interface The fourteenth air port is connected to the output pressure interface of the first controller, the sixteenth air port is connected to the seventh air port of the second conversion device, and the rotary switching device includes two states: state a2 and state b2. When in state a2, the thirteenth air port is connected to the fourteenth air port, the sixteenth air port is connected to the ninth air port, and the eleventh air port is connected to the eighth air port; when in state b2, the fourteenth air port is connected to the fifteenth air port, the ninth air port is connected to the tenth air port, and the twelfth air port is connected to the eighth air port.

[0021] Further, the second conversion device includes a fifth air port, a sixth air port, and a seventh air port, the fifth air port is connected to the second set pressure interface and the third set pressure interface, the sixth air port is connected to the first external set pressure interface, and the seventh air port is connected to the sixteenth air port of the rotary switching device. The second conversion device includes two manually convertible connection states: state a211 and state b211. When in state a211, the fifth air port and the seventh air port are connected, and the sixth air port is closed. At this time, the output of the second conversion device is the pressure of the sixteenth air port in the manual control mode. When in state b211, the fifth air port and the sixth air port are connected, and the seventh air port is closed. At this time, the output of the second conversion device is the pressure of the first external set pressure interface.

[0022] Furthermore, the setting module also includes a setting pressure display and an air cushion chamber pressure display, the setting pressure display is connected to the pipeline between the seventh air inlet and the sixteenth air inlet, and the air cushion chamber pressure display is connected to the second receiving pressure interface and the third receiving pressure interface.

[0023] Furthermore, the operation module is provided with a first air source pressure interface, a first set pressure interface, a first operation output pressure interface, a first receiving pressure interface, a needle valve switch pressure interface, a first conversion device, an air chamber, a needle valve, a first amplifier, a first throttle hole, a first wave spring, a second wave spring, a third wave spring, and a fourth wave spring, wherein the first air source pressure interface is connected to the second air source pressure interface, and at the same time, one path of the first air source pressure interface provides air source to the air source cavity of the first amplifier, and the other path is ejected from the nozzle through the first throttle hole, and one path of pressure is drawn between the first throttle hole and the nozzle to flow into the input cavity of the first amplifier, and after the output cavity of the first amplifier linearly outputs an output pressure according to the input cavity pressure, the pressure directly flows into the fourth wave spring. , one path is output from the first operation output pressure interface, and the other path flows into the needle valve, the air chamber and the second wave spring in sequence, the second wave spring and the fourth wave spring are a group of springs, the same size, symmetrical position, play the role of integral regulation, the first set pressure interface and the first receiving pressure interface are respectively connected to the two input ends of the first conversion device, the two output ends of the first conversion device are switchably connected to the first wave spring and the third wave spring, the first wave spring and the third wave spring are a group of springs, the same size, symmetrical position, play the role of proportional regulation, the needle valve switch pressure interface is connected to the needle valve, when the pressure of the needle valve switch pressure interface is atmospheric pressure, the needle valve plays a throttling role, when the pressure of the needle valve switch pressure interface is the air source pressure, the needle valve does not play a throttling role.

[0024] Further, the first conversion device includes a first air port, a second air port, a third air port, and a fourth air port. The first air port is connected to the third wave spring, the second air port is connected to the first set pressure interface, the third air port is connected to the first wave spring, and the fourth air port is connected to the first receiving pressure interface. The first conversion device includes two connection states: state a16 and state b16. When in state a16, the first air port is connected to the fourth air port, and the second air port is connected to the third air port. When in state b16, the first air port and the second air port are connected, and the third air port is connected to the fourth air port. The states a16 and b16 correspond to the positive control and negative control of the controller, respectively.

[0025] Furthermore, the first conversion device and the second conversion device are rotary conversion devices.

[0026] Compared with the prior art, this application has the following beneficial effects:

[0027] The present invention provides a pneumatic pressure controller, comprising: an operation module, a setting module, and an input-output module. The operation module is connected to the setting module gas circuit, and is used for inputting a working gas source, a set pressure, a receiving pressure, and a needle valve switch pressure, performing proportional integral operation through a plurality of wave springs, outputting a control pressure after the operation, and realizing positive or negative control; the setting module is connected to the operation module and the input-output module gas circuit respectively, and is used for realizing switching between a manual control mode and an automatic control mode by changing a gas flow direction, and at the same time, by manually adjusting the pressure, providing a set pressure in the automatic control mode, and providing an output pressure of the controller in the manual control mode; the input-output module is connected to the setting module gas circuit, and is used for collecting an air cushion chamber pressure and an external set pressure, introducing an external gas source, providing gas consumption for the controller function, and at the same time, outputting the control pressure of the controller. Compared with the prior art, the present application has the following technical advantages:

[0028] 1. This application adopts pure gas driven pressure automatic control, which has strong anti-interference ability and high reliability;

[0029] 2. This application splits the controller into three modules. The functional principle of each module is clear and the internal integration of the module is high. The modules can be installed separately and the gas circuit can be connected with a hose or other means.

[0030] 3. This application sets up multiple pressure conversion devices to achieve positive / reverse control of the valve and remote / local control of the set pressure.

[0031] 4. This application only provides a manual pressure adjustment device and a rotating device, and the pressure is switched by the rotating device to achieve switching between manual control mode and automatic control mode.

[0032] 5. The gas circuit of the present invention is concise, the structure is simple, the risk of gas leakage is small, and the fault is easy to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0034] Figure 1 It is a module schematic diagram of a pneumatic pressure controller of a preferred embodiment of the present application.

[0035] Figure 2 This is the gas circuit diagram of the input and output modules of the preferred embodiment of the present application.

[0036] Figure 3 It is a schematic diagram of the gas circuit of the computing module of the preferred embodiment of the present application.

[0037] Figure 4It is a state-structure diagram of the first conversion device of the preferred embodiment of the present application.

[0038] Figure 5 It is a schematic diagram of the state 2 structure of the first conversion device of the preferred embodiment of the present application.

[0039] Figure 6 It is a gas circuit schematic diagram of setting module state 1 of the preferred embodiment of the present application.

[0040] Figure 7 It is a gas circuit principle diagram of setting module state 2 of the preferred embodiment of the present application.

[0041] Figure 8 It is a state-structure diagram of the second conversion device of the preferred embodiment of the present application.

[0042] Fig. 9 It is a schematic diagram of the state 2 structure of the second conversion device of the preferred embodiment of the present application.

[0043] In the figure: 1. operation module; 2. setting module; 3. input and output module; 11. first air source pressure interface; 12. first setting pressure interface; 13. first operation output pressure interface; 14. first receiving pressure interface; 15. needle valve switch pressure interface; 16. first conversion device; 161. first air connection port; 162. second air connection port; 163. third air connection port; 164. fourth air connection port; 17. air chamber; 18. needle valve; 19. first amplifier; 20. first throttle hole; 21. second air source pressure interface; 201. first wave spring; 210. second receiving pressure interface; 211. second conversion device; 2111. fifth air connection port; 2112. sixth air connection port; 2113. seventh air connection port; 212. manual pressure regulating mechanism; 213. feedback diaphragm; 214. second amplifier; 215. second throttle hole; 216. set pressure display; 217. air cushion chamber pressure force display; 218, the eighth air connection port; 219, the ninth air connection port; 22, the second set pressure interface; 202, the second wave spring; 220, the tenth air connection port; 221, the eleventh air connection port; 222, the twelfth air connection port; 223, the thirteenth air connection port; 224, the fourteenth air connection port; 225, the fifteenth air connection port; 226, the sixteenth air connection port; 23, the second operation output pressure interface; 203, the third wave spring; 24, the third receiving pressure interface; 204, the fourth wave spring; 25, the needle valve switch pressure interface; 205, the nozzle; 26, the first external set pressure interface; 27, the third gas source pressure interface; 28, the third set pressure interface; 29, the first controller output pressure interface; 31, the second external set pressure interface; 32, the fourth gas source pressure interface; 33, the fourth set pressure interface; 34, the second controller output pressure interface; 35, the fourth receiving pressure interface. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] Reference Figure 1 The preferred embodiment of the present application provides a pneumatic pressure controller, comprising: a calculation module 1, a setting module 2, an input and output module 3,

[0046] The operation module 1 is connected to the setting module 2 in an air circuit, and is used for inputting the working air source, the setting pressure, the receiving pressure, and the needle valve switch pressure, performing proportional integral operation through a plurality of wave springs, outputting the control pressure after the operation, and realizing the positive or negative control;

[0047] The setting module 2 is connected to the operation module 1 and the input / output module 3 respectively, and is used to switch between the manual control mode and the automatic control mode by changing the gas flow direction, and at the same time, by manually adjusting the pressure, provides the set pressure in the automatic control mode and provides the output pressure of the controller in the manual control mode;

[0048] The input-output module 3 is connected to the setting module 2 in an air circuit, and is used to collect the air cushion chamber pressure and the external setting pressure, introduce an external air source, provide air consumption for the controller function, and output the control pressure of the controller.

[0049] The present embodiment provides a pneumatic pressure controller, including: an operation module 1, a setting module 2, and an input-output module 3. The operation module 1 is connected to the setting module 2 by air circuit, and is used for inputting a working gas source, a set pressure, a receiving pressure, and a needle valve switch pressure, and performs proportional integral operation through a plurality of wave springs, outputs the control pressure after the operation, and realizes positive or negative control; the setting module 2 is connected to the operation module 1 and the input-output module 3 by air circuit, and is used for realizing the switching between the manual control mode and the automatic control mode by changing the gas flow direction, and at the same time, by manually adjusting the pressure, provides the set pressure in the automatic control mode, and provides the output pressure of the controller in the manual control mode; the input-output module 3 is connected to the setting module 2 by air circuit, and is used for collecting the air cushion chamber pressure and the external set pressure, introducing the external gas source, providing the gas consumption of the controller function, and at the same time, outputting the control pressure of the controller. Compared with the prior art, the present embodiment has the following technical advantages:

[0050] 1. This embodiment adopts pure gas driven pressure automatic control, which has strong anti-interference ability and high reliability;

[0051] 2. In this embodiment, the controller is divided into three modules. The functional principle of each module is clear and the internal integration of the module is high. The modules can be installed separately and the gas circuits can be connected with hoses or other methods.

[0052] 3. This embodiment provides a plurality of pressure conversion devices to realize the positive / reverse action control of the valve and the remote / local control of the set pressure.

[0053] 4. This embodiment only provides a manual pressure adjustment device and a rotating device, and the pressure is switched by the rotating device to achieve switching between the manual control mode and the automatic control mode.

[0054] 5. This embodiment has a concise gas circuit, a simple structure, a low risk of gas leakage, and easy fault inspection and repair.

[0055] Specifically, in a preferred embodiment of the present application, the input-output module 3 is also used to: lead out the controller set pressure for remote display to facilitate monitoring.

[0056] Specifically, Figure 2 As shown, in a preferred embodiment of the present application, the input-output module 3 includes a second external set pressure interface 31, a fourth gas source pressure interface 32, a fourth set pressure interface 33, a second controller output pressure interface 34, and a fourth receiving pressure interface 35, wherein the second external set pressure interface 31 is used to receive the pressure in the external set pressure controller as automatic control, and when the control pressure is set from inside the controller, the input is closed; the fourth gas source pressure interface 32 is used to receive the gas source pressure to provide functional gas for various components of the controller; the fourth set pressure interface 33 is used to output the automatic control pressure set by the controller; the second controller output pressure interface 34 is used to output the control signal pressure; the fourth receiving pressure interface 35 is used to receive the air cushion chamber pressure that has been linearly transmitted for feedback calculation.

[0057] Specifically, Figure 6 and Figure 7 As shown, in a preferred embodiment of the present application, the setting module 2 includes: a second gas source pressure interface 21, a second receiving pressure interface 210, a second conversion device 211; a manual pressure regulating mechanism 212, a feedback diaphragm 213, a second amplifier 214, a second throttle hole 215, a second set pressure interface 22; a second operation output pressure interface 23, a third receiving pressure interface 24, a needle valve switch pressure interface 25, a first external set pressure interface 26, a third gas source pressure interface 27, a first set pressure interface 28; a first controller output pressure interface 29, a rotation switching device, wherein:

[0058] The first external set pressure interface 26 is connected to the second external set pressure interface 31, and is connected to an input end of the second conversion device 211 at one end. The output end of the second conversion device 211 is connected to the second set pressure interface 22 at one end and to the third set pressure interface 28 at the other end. The other input end of the second conversion device 211 is connected to an output end of the rotation switching device.

[0059] The third gas source pressure interface 27 is connected to the fourth gas source pressure interface 32, and is connected to the second gas source pressure interface 21, one of the input ends of the rotary switching device, the gas source cavity of the second amplifier 214, the second throttle hole 215 and the manual pressure regulating mechanism 212. A pipeline is connected to the input cavity of the second amplifier 214 on the pipeline between the second throttle hole 215 and the manual pressure regulating mechanism 212. The output cavity of the second amplifier 214 linearly outputs an output pressure according to the input cavity pressure, which is fed back to the feedback diaphragm 213 and the other input end of the rotary switching device respectively.

[0060] The third set pressure interface 28 is connected to the fourth set pressure interface 33;

[0061] The first controller output pressure interface 29 is connected to the second controller output pressure interface 34 and is also connected to the other output end of the rotary switching device; the second receiving pressure interface 210 is connected to the fourth receiving pressure interface 35 and is also connected to the third receiving pressure interface 24;

[0062] The second calculation output pressure interface 23 is connected to the other input end of the rotation switching device;

[0063] The needle valve switch pressure interface 25 is connected to the other output end of the rotary switching device.

[0064] Specifically, in a preferred embodiment of the present application, the rotary switching device includes an eighth air port 218, a ninth air port 219, a tenth air port 220, an eleventh air port 221, a twelfth air port 222, a thirteenth air port 223, a fourteenth air port 224, a fifteenth air port 225, and a sixteenth air port 226, the ninth air port 219 is connected to the second amplifier 214 and the feedback diaphragm 213, the tenth air port 220 is connected to the fifteenth air port 225, and the eighth air port The port 218 is connected to the needle valve switch pressure interface 25, the twelfth air port 222 is connected to the second air source pressure interface 21 and the first air source pressure interface 27, the thirteenth air port 223 is connected to the second operation output pressure interface 23, the fourteenth air port 224 is connected to the first controller output pressure interface 29, the sixteenth air port 226 is connected to the seventh air port 2113 of the second conversion device 211, and the rotation switching device includes two states: state a2 and state b2, as shown in FIG. Figure 6 As shown, when in state a2, the thirteenth air inlet 223 is connected to the fourteenth air inlet 224, the sixteenth air inlet 226 is connected to the ninth air inlet 219, the eleventh air inlet 221 is connected to the atmosphere, and is also connected to the eighth air inlet 218; Figure 7 As shown, when in state b2 , the fourteenth air receiving port 224 is connected to the fifteenth air receiving port 225 , the ninth air receiving port 219 is connected to the tenth air receiving port 220 , and the twelfth air receiving port 222 is connected to the eighth air receiving port 218 .

[0065] Specifically, in a preferred embodiment of the present application, the second conversion device 211 includes a fifth air port 2111, a sixth air port 2112, and a seventh air port 2113, wherein the fifth air port 2111 is connected to the second set pressure interface 22 and the third set pressure interface 28, the sixth air port 2112 is connected to the first external set pressure interface 26, the seventh air port 2113 is connected to the sixteenth air port 226 of the rotary switching device, and the second conversion device 211 includes two manually switchable connection states: state a211 and state b211. Figure 8 As shown, when in state a211, the fifth air inlet 2111 and the seventh air inlet 2113 are connected, and the sixth air inlet 2112 is closed. At this time, the output of the second conversion device 211 is the pressure of the sixteenth air inlet 226 in the manual control mode, as shown in FIG. Fig. 9 As shown, when in state b211, the fifth air port 2111 and the sixth air port 2112 are connected, and the seventh air port 2113 is closed, and the output of the second conversion device 211 is the pressure of the first external set pressure interface 26. The two states can realize local and remote control of the set pressure.

[0066] Specifically, Figure 6 and Figure 7 As shown, in a preferred embodiment of the present application, the setting module 2 also includes a setting pressure display 216 and an air cushion chamber pressure display 217, the setting pressure display 216 is connected to the pipeline between the seventh air inlet 2113 and the sixteenth air inlet 226, and the air cushion chamber pressure display 217 is connected to the second receiving pressure interface 210 and the third receiving pressure interface 24.

[0067] One of the functions of the setting module 2 shown is to manually set the air cushion chamber pressure to be controlled in the automatic control mode, and the controller will automatically perform calculations and controls to control the air cushion chamber pressure near the set pressure; the second function is to manually adjust the output signal pressure of the controller in the manual control mode, and the signal pressure controls the opening and closing of the inlet and outlet valves, thereby artificially controlling the air cushion chamber pressure. The setting module 2 enables the controller to be automatically controlled or manually controlled. The manual pressure regulating mechanism 212, the manual pressure regulating mechanism 213 and the second amplifier 214 are used to manually adjust the pressure. The output pressure of the second amplifier 214 is the output pressure of the entire regulating device (the pressure of the ninth air port 219). State a2 is the automatic control mode. In this mode, the output pressure of the regulating device flows through the ninth air port 219, the sixteenth air port 226, the second conversion device 211, the second set pressure interface 22, and finally flows into the calculation module 1 as the set pressure for its automatic control. The output pressure of the operation module 1 after operation reaches the fourteenth air port 224 through the second operation output pressure interface 23 and the thirteenth air port 223, and then flows into the input-output module 3 from the first controller output pressure interface 29. At the same time, the eighth air port 218 is connected to the eleventh air port 221, and the air pressure is atmospheric pressure. At this time, the needle valve 18 of the operation module 1 is throttled normally. State b2 is a manual control mode. In this mode, the output pressure of the regulating device flows through the ninth air port 219, the tenth air port 220, the fifteenth air port 225, and the fourteenth air port 224 in turn, and the controller outputs pressure to the first controller output pressure interface 29, and finally flows into the input-output module 3. At the same time, the eighth air port 218 is connected to the twelfth air port 222, and the air pressure is the air source pressure. The needle valve 18 does not throttle, and the output pressure of the operation module 1 does not flow after flowing into the thirteenth air port 223, and the operation module 1 does not work.

[0068] Specifically, in a preferred embodiment of the present application, the operation module 1 is provided with a first air source pressure interface 11, a first set pressure interface 12, a first operation output pressure interface 13, a first receiving pressure interface 14, a needle valve switch pressure interface 15, a first conversion device 16, an air chamber 17, a needle valve 18, a first amplifier 19, a first throttle hole 20, a first wave spring 201, a second wave spring 202, a third wave spring 203, and a fourth wave spring 204, wherein the first air source pressure interface 11 is connected to the second air source pressure interface, and at the same time, one path of the first air source pressure interface 11 provides an air source to the air source cavity of the first amplifier 19, and the other path is ejected from the nozzle 205 through the first throttle hole 20, and one path of pressure is drawn between the first throttle hole 20 and the nozzle 205 to flow into the input cavity of the first amplifier 19, and after the output cavity of the first amplifier 19 linearly outputs an output pressure according to the input cavity pressure, the pressure flows directly into the fourth wave spring 204, and one path from The first operation output pressure interface 13 outputs, and the other path flows into the needle valve 18, the air chamber 17 and the second wave spring 202 in sequence. The second wave spring 202 and the fourth wave spring 204 are a group of springs with the same size and symmetrical position, which play the role of integral regulation. The first setting pressure interface 12 and the first receiving pressure interface 14 are respectively connected to the two input ends of the first conversion device 16. The two output ends of the first conversion device 16 are switchably connected to the first wave spring 201 and the third wave spring 203. The first wave spring 201 and the third wave spring 203 are a group of springs with the same size and symmetrical position, which play the role of proportional regulation. The needle valve switch pressure interface 15 is connected to the needle valve 18. The needle valve 18 is a throttling device. The opening of the throttling hole can be adjusted to adjust the gas path flow. When the pressure of the needle valve switch pressure interface 15 is atmospheric pressure, the needle valve 18 plays a throttling role. When the pressure of the needle valve switch pressure interface 15 is the air source pressure, the needle valve 18 does not play a throttling role. The conversion process of the needle valve switch pressure is carried out in the setting module 2. The computing module 1 of this embodiment is an automatically controlled proportional integral pressure controller, the core of which is to compare the air pressure of the first wave spring 201 and the third wave spring 203, and the difference between the two proportionally controls the automatic output pressure to the first computing output pressure interface 13. At the same time, the output pressure is also fed back to the second wave spring 202 and the fourth wave spring 204, forming an integral control on the output pressure.

[0069] Specifically, in a preferred embodiment of the present application, the first conversion device 16 includes a first air inlet 161, a second air inlet 162, a third air inlet 163, and a fourth air inlet 164. The first air inlet 161 is connected to the third wave spring 203, the second air inlet 162 is connected to the first set pressure interface 12, the third air inlet 163 is connected to the first wave spring 201, and the fourth air inlet 164 is connected to the first receiving pressure interface 14. The first conversion device 16 includes two connection states: state a16 and state b16. Figure 4 As shown, when in state a16, the first air inlet 161 is connected to the fourth air inlet 164, and the second air inlet 162 is connected to the third air inlet 163. At this time, the pressure of the first setting pressure interface 12 and the pressure of the first receiving pressure interface 14 flow into the first wave spring 201 and the third wave spring 203 respectively through the first conversion device 16. Figure 5 As shown, when in state b16, the first air port 161 and the second air port 162 are connected, and the third air port 163 and the fourth air port 164 are connected. At this time, the pressure of the first set pressure interface 12 and the pressure of the first receiving pressure interface 14 flow into the third wave spring 203 and the first wave spring 201 respectively through the first conversion device 16. The state a16 and state b16 correspond to the positive control and negative control of the controller respectively.

[0070] Specifically, in a preferred embodiment of the present application, the first conversion device 16 and the second conversion device 211 are rotation switching devices.

[0071] In addition, the manual pressure regulating mechanism in the above embodiment can be either a handle mechanism or other manual pressure regulating mechanisms, such as a pressure reducing valve. The operation module in the above embodiment is a purely pneumatic proportional integral operator, which can be replaced by an electronically controlled operator through signal conversion. The rotary switching device in the above embodiment can be split into two rotary devices, which separate the switching of the manual / automatic control mode and the switching of the needle valve switch pressure, and control them separately; the controller in the above embodiment can set the operation module 1, the setting module 2, and the input-output module 3 as an integral module without changing the gas circuit principle.

[0072] When the above-mentioned controller is working, the control pressure is first set manually, and the controller collects the air cushion chamber pressure. When the air cushion chamber pressure is lower than the control pressure, the intake valve is controlled to intake air, otherwise, the exhaust valve is controlled to exhaust air, and finally the air cushion chamber pressure is made the same as the set pressure. Specifically, the core function of the above-mentioned pneumatic pressure controller is to realize automatic control of the external air cushion chamber pressure. It collects the air cushion chamber pressure from the outside (needs to undergo linear transmission, which is the receiving pressure of the fourth receiving pressure interface 35 after transmission), and compares it with the manually set air cushion chamber pressure. When the actual air cushion chamber pressure is lower than the set air cushion chamber pressure, the controller outputs the pressure required by the intake valve (the controller outputs the pressure of the second controller output pressure interface 34), controls the intake valve to open, and inflates the air cushion chamber to increase its pressure; otherwise, when the actual air cushion chamber pressure is higher than the set air cushion chamber pressure, the controller outputs the pressure required by the exhaust valve (the controller outputs the pressure of the second controller output pressure interface 34, and this pressure range does not overlap with the intake valve opening pressure range), controls the exhaust valve to open, and the air cushion chamber is deflated, and the pressure drops. After a period of time, the actual air cushion chamber pressure is equal to the set air cushion chamber pressure.

[0073] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A pneumatic pressure controller, characterized in that: include: An operation module (1), a setting module (2), and an input / output module (3), wherein the operation module (1) is connected to the setting module (2) by air circuit, and is used for inputting a working gas source, a set pressure, a receiving pressure, and a needle valve switch pressure, performing proportional integral operation through a plurality of wave springs, outputting a control pressure after the operation, and realizing positive or negative control; the setting module (2) is connected to the operation module (1) and the input / output module (3) by air circuit, and is used for realizing switching between a manual control mode and an automatic control mode by changing a gas flow direction, and at the same time, by manually adjusting the pressure, providing a set pressure in the automatic control mode, and providing an output pressure of the controller in the manual control mode; the input / output module (3) is connected to the setting module (2) by air circuit, and is used for collecting an air cushion chamber pressure and an external set pressure, introducing an external gas source, providing gas consumption for the controller function, and at the same time, outputting the control pressure of the controller;The operation module (1) is provided with a first air source pressure interface (11), a first set pressure interface (12), a first operation output pressure interface (13), a first receiving pressure interface (14), a needle valve switch pressure interface (15), a first conversion device (16), an air chamber (17), a needle valve (18), a first amplifier (19), a first throttle hole (20), a first wave spring (201), a second wave spring (202), a third wave spring (203), and a fourth wave spring (204), wherein the first air source pressure interface (11) is connected to the second air source pressure interface, and at the same time, one path of the first air source pressure interface (11) provides air source to the air source cavity of the first amplifier (19), and the other path is ejected from the nozzle (205) through the first throttle hole (20), and a pressure path is drawn between the first throttle hole (20) and the nozzle (205) to flow into the input cavity of the first amplifier (19), and after the output cavity of the first amplifier (19) linearly outputs an output pressure according to the input cavity pressure, the pressure path directly flows into the fourth wave spring (204). The first operating output pressure interface (13) is connected to the first wave spring (204), one of which is output from the first operating output pressure interface (13), and the other of which flows into the needle valve (18), the air chamber (17) and the second wave spring (202) in sequence. The second wave spring (202) and the fourth wave spring (204) are a group of springs with the same size and symmetrical position, and play an integral adjustment role. The first set pressure interface (12) and the first receiving pressure interface (14) are respectively connected to the two input ends of the first conversion device (16). The two input ends of the first conversion device (16) are connected to the first set pressure interface (12) and the first receiving pressure interface (14). The outlet end is switchably connected to the first wave spring (201) and the third wave spring (203); the first wave spring (201) and the third wave spring (203) are a set of springs with the same size and symmetrical position, and play a role of proportional regulation; the needle valve switch pressure interface (15) is connected to the needle valve (18); when the pressure of the needle valve switch pressure interface (15) is atmospheric pressure, the needle valve (18) plays a throttling role; when the pressure of the needle valve switch pressure interface (15) is the air source pressure, the needle valve (18) does not play a throttling role. ; 2. The pneumatic pressure controller according to claim 1, characterized in that: The input-output module (3) is also used to lead out the controller set pressure for remote display.

3. The pneumatic pressure controller according to claim 1, characterized in that: The input-output module (3) comprises a second external set pressure interface (31), a fourth gas source pressure interface (32), a fourth set pressure interface (33), a second controller output pressure interface (34), and a fourth receiving pressure interface (35), wherein the second external set pressure interface (31) is used to receive the pressure of the external set pressure controller as the automatic control pressure, and when the control pressure is set from inside the controller, the input quantity is closed; the fourth gas source pressure interface (32) is used to receive the gas source pressure to provide functional gas for various components of the controller; the fourth set pressure interface (33) is used to output the automatic control pressure set by the controller; the second controller output pressure interface (34) is used to output the controller output pressure by controlling the opening and closing and opening of the valve; the fourth receiving pressure interface (35) is used to receive the air cushion chamber pressure transmitted by linear transmission for feedback operation.

4. The pneumatic pressure controller according to claim 3, characterized in that: The setting module (2) comprises: a second gas source pressure interface (21), a second receiving pressure interface (210), a second conversion device (211); a manual pressure regulating mechanism (212), a feedback diaphragm (213), a second amplifier (214), a second throttle hole (215), a second setting pressure interface (22); a second operation output pressure interface (23), a third receiving pressure interface (24), a needle valve switch pressure interface (25), a first external setting pressure interface (26), a third gas source pressure interface (27), a first setting pressure interface (28); a first controller output pressure interface (29), a rotation switching device, wherein: The first external set pressure interface (26) is connected to the second external set pressure interface (31), and is connected to an input end of a second conversion device (211) at one end, the output end of the second conversion device (211) is connected to the second set pressure interface (22) at one end, and is connected to the third set pressure interface (28) at the other end, and the other input end of the second conversion device (211) is connected to an output end of a rotation switching device; The third gas source pressure interface (27) is connected to the fourth gas source pressure interface (32), and is also connected to the second gas source pressure interface (21), one of the input ends of the rotary switching device, the gas source cavity of the second amplifier (214), the second throttle hole (215) and the manual pressure regulating mechanism (212) respectively. A pipeline is connected to the input cavity of the second amplifier (214) on the pipeline between the second throttle hole (215) and the manual pressure regulating mechanism (212). The output cavity of the second amplifier (214) linearly outputs an output pressure according to the input cavity pressure, which is fed back to the feedback diaphragm (213) and the other input end of the rotary switching device respectively. The third set pressure interface (28) is connected to the fourth set pressure interface (33); The first controller output pressure interface (29) is connected to the second controller output pressure interface (34), and is also connected to the other output end of the rotation switching device; The second receiving pressure interface (210) is connected to the fourth receiving pressure interface (35) and is also connected to the third receiving pressure interface (24); The second calculation output pressure interface (23) is connected to the other input end of the rotation switching device; The needle valve switch pressure interface (25) is connected to the other output end of the rotation switching device.

5. The pneumatic pressure controller according to claim 4, characterized in that: The rotary switching device comprises an eighth air connection port (218), a ninth air connection port (219), a tenth air connection port (220), an eleventh air connection port (221), a twelfth air connection port (222), a thirteenth air connection port (223), a fourteenth air connection port (224), a fifteenth air connection port (225), and a sixteenth air connection port (226); the ninth air connection port (219) is connected to the second amplifier (214) and the feedback diaphragm (213); the tenth air connection port (220) is connected to the fifteenth air connection port (225); the eighth air connection port (218) is connected to the needle valve switch pressure interface (25); the twelfth air connection port (222) is connected to the second air source pressure interface (21) and the first air source pressure interface (27); the thirteenth air connection port (223) is connected to the second operation output pressure interface (214); (23), the fourteenth air port (224) is connected to the first controller output pressure interface (29), the sixteenth air port (226) is connected to the seventh air port (2113) of the second conversion device (211), and the rotary switching device includes two states: state a2 and state b2. When in state a2, the thirteenth air port (223) is connected to the fourteenth air port (224), the sixteenth air port (226) is connected to the ninth air port (219), and the eleventh air port (221) is connected to the eighth air port (218); when in state b2, the fourteenth air port (224) is connected to the fifteenth air port (225), the ninth air port (219) is connected to the tenth air port (220), and the twelfth air port (222) is connected to the eighth air port (218).

6. The pneumatic pressure controller according to claim 5, characterized in that: The second conversion device (211) comprises a fifth air connection port (2111), a sixth air connection port (2112), and a seventh air connection port (2113); the fifth air connection port (2111) is connected to the second set pressure interface (22) and the third set pressure interface (28); the sixth air connection port (2112) is connected to the first external set pressure interface (26); the seventh air connection port (2113) is connected to the sixteenth air connection port (226) of the rotary switching device; the second conversion device (211) comprises two manually switchable connection states: state a2 11. State b211. When in state a211, the fifth air port (2111) and the seventh air port (2113) are connected, and the sixth air port (2112) is closed. At this time, the output of the second conversion device (211) is the pressure of the sixteenth air port (226) in the manual control mode. When in state b211, the fifth air port (2111) and the sixth air port (2112) are connected, and the seventh air port (2113) is closed. At this time, the output of the second conversion device (211) is the pressure of the first external set pressure interface (26).

7. The pneumatic pressure controller according to claim 6, characterized in that: The setting module (2) further comprises a setting pressure display (216) and an air cushion chamber pressure display (217); the setting pressure display (216) is connected to the pipeline between the seventh air inlet (2113) and the sixteenth air inlet (226); and the air cushion chamber pressure display (217) is connected to the second receiving pressure interface (210) and the third receiving pressure interface (24).

8. The pneumatic pressure controller according to claim 1, characterized in that: The first conversion device (16) comprises a first air inlet (161), a second air inlet (162), a third air inlet (163), and a fourth air inlet (164); the first air inlet (161) is connected to a third wave spring (203); the second air inlet (162) is connected to a first set pressure interface (12); the third air inlet (163) is connected to the first wave spring (201); the fourth air inlet (164) is connected to the first receiving pressure interface (14); the first conversion device (16) comprises a first air inlet (161), a second air inlet (162), a third air inlet (163), and a fourth air inlet (164); The exchange device (16) comprises two connection states: state a16 and state b16. When in state a16, the first air inlet (161) and the fourth air inlet (164) are connected, and the second air inlet (162) and the third air inlet (163) are connected. When in state b16, the first air inlet (161) and the second air inlet (162) are connected, and the third air inlet (163) and the fourth air inlet (164) are connected. The states a16 and b16 correspond to the positive control and the negative control of the controller, respectively.

9. The pneumatic pressure controller according to claim 1, characterized in that: The first conversion device (16) and the second conversion device (211) are rotary conversion devices.

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