A pilot device for a gas pressure regulator

Abstract

This invention proposes a controller for a gas pressure regulator, relating to the field of gas pressure regulator technology. It includes an actuator, a valve body, and a low-pressure actuator. One end of the valve body has an upper chamber, and the other end has a lower chamber. Both the upper and lower chambers contain matching diaphragms. An actuator is installed within the valve body, forcing the two diaphragms to interact with the corresponding actuator ends of the upper and lower chambers, respectively. The valve body includes a regulating mechanism for adjusting the pressure signals in the upper and lower chambers, preventing rapid pressure signal changes from causing surges in the pressure regulating system. The damping value can be adjusted according to the position of the damper within the valve body. A flow limiter adjusts the pressure relief rate to regulate the response time of the pressure regulating system. The actuator within the valve body enables the valve body to have a fast-release function, allowing for rapid pressure relief under complex operating conditions, ensuring response time and accuracy.

Description

Technical Field

[0001] This invention relates to the field of gas pressure regulator technology, and more specifically, to a controller for a gas pressure regulator. Background Technology

[0002] A gas pressure regulator is a device that automatically adjusts the outlet pressure of gas to stabilize it within a certain pressure range. A gas pressure regulator consists of a pilot valve and a main valve. The inlet pressure of the regulator is collectively referred to as P1, which is relatively high, while the outlet pressure is collectively referred to as P2, which is relatively low and requires stability. Gas delivered through gas pipelines is regulated from P1 to P2 by the main valve of the regulator before being supplied to downstream pipelines or gas appliances. The driving pressure, collectively referred to as P3, lies between the inlet and outlet pressures and is the variable used to adjust the opening size of the main valve, provided by the pilot valve. The pilot valve, also known as the pilot valve, is a preamplifier in an indirect-acting regulator. Its function is to use the change in outlet pressure P2, amplify it to obtain the driving pressure P3, and then control the opening size of the main valve cylinder and valve seat to maintain the stability of the main valve outlet pressure P2 of the regulator.

[0003] The working principle of the pressure regulator is as follows: the inlet gas pressure P1 is conducted through the stabilizer and the pilot valve to the driving pressure P3, which is controlled by the elastic rubber. The pilot valve controls the pressure of P3. When the pilot valve is closed, P3 equals P2, thus balancing the pressure on both sides of the main valve's elastic rubber, achieving closure through its own elasticity or the force of the closing spring. When gas is used, P2 in the lower chamber of the pilot valve diaphragm decreases, driving the pilot valve to open, increasing P3. Since P2 in the main valve of the pressure regulator is less than P3, the pressure regulator gradually opens. After dynamic balancing, the pressure regulating function is achieved. Currently, the operation of the existing pressure regulator pilot valve is significantly affected by the pre-regulation gas pressure P1. When P1 fluctuates greatly, P3 also fluctuates significantly, affecting the accuracy and stability of the post-regulation gas pressure P2, causing turbulence in the pressure regulating system, which is detrimental to the operation of the pilot valve. Furthermore, existing pilot valves are difficult to disassemble, resulting in inconvenient maintenance. Summary of the Invention

[0004] The purpose of this invention is to provide a controller for a gas pressure regulator, which addresses the shortcomings of the prior art and solves the problems mentioned in the background section.

[0005] The technical solution of this invention is implemented as follows:

[0006] This invention provides a controller for a gas pressure regulator, comprising an actuator, a valve body, and a low-pressure actuator;

[0007] One end of the valve body has an upper cavity, and the other end has a lower cavity. Both the upper and lower cavities of the valve body are equipped with matching diaphragms. The actuator is installed at one end of the valve body, and the actuator end abuts against the diaphragm in the upper cavity of the valve body.

[0008] The low-pressure actuator is installed at the other end of the valve body. The actuating end of the low-pressure actuator abuts against the diaphragm element placed in the lower cavity of the valve body. An actuator is installed in the valve body. The actuator is used to force the two diaphragms to be linked with the actuating ends of their corresponding actuators and the actuating ends of the low-pressure actuator, respectively.

[0009] The valve body is equipped with an adjustment mechanism for regulating the pressure signals in the upper and lower chambers of the valve body.

[0010] In some technical solutions of the present invention, the actuator includes two mounting holes opened in the valve body for connecting the upper cavity and the lower cavity of the valve body. A valve stem is inserted through each mounting hole. A lower tray connected to the two valve stems is provided in both the upper cavity and the lower cavity of the valve body. A diaphragm is sleeved on the lower tray. An upper tray abuts against the diaphragm is provided on the lower tray. A sealing element is provided in the middle of each valve stem. A compression nut abuts against the upper tray is provided on the lower tray.

[0011] In some technical solutions of the present invention, the regulating mechanism includes a pipe container interface opened on the outer wall of the valve body, a first mounting port communicating with the pipe container interface opened on the side wall of the valve body, a flow limiter installed in the first mounting port, a blocking member abutting against the flow limiter in the first mounting port, a first channel opening in the valve body communicating with the first mounting port and the lower cavity of the valve body respectively; a second mounting port communicating with the upper cavity of the valve body opened on the side wall of the valve body; a damping bolt installed in the second mounting port, a second channel opening in the valve body communicating with the second mounting port and the lower cavity of the valve body respectively, an input port communicating with the lower cavity of the valve body opened on the valve body; an output port communicating with the lower cavity of the valve body opened on the valve body, and a control component for controlling the communication between the lower cavity of the valve body and the input port in the valve body.

[0012] In some technical solutions of the present invention, the control component includes a valve port and a valve core disposed in the valve body. An inlet port communicating with the input port is provided on the outer wall of the valve port. The valve port is connected to the lower cavity of the valve body. An assembly port adapted to the valve core is provided on the lower tray installed in the lower cavity of the valve body. A quick-release spring connected to the inner wall of the assembly port is sleeved on the valve core.

[0013] A closing nut is fitted onto the end of the valve core that is away from the valve port, and the closing nut abuts against the inner wall of the assembly port.

[0014] In some technical solutions of the present invention, the actuator includes a pressure regulating diaphragm cover detachably mounted on the valve body. An upper nut is provided at one end of the pressure regulating diaphragm cover away from the valve body. A pressure regulating rod is passed through the upper nut. An upper spring seat and a lower spring seat are slidably mounted inside the pressure regulating diaphragm cover. A pressure regulating spring is provided between the upper spring seat and the lower spring seat. A locking nut for locking the pressure regulating rod is provided on the upper nut. A groove adapted to the locking nut is opened on the side wall of the lower spring seat opposite to the valve body.

[0015] In some technical solutions of the present invention, the low-pressure actuator includes a low-pressure lower membrane cover and a low-pressure upper membrane cover. The low-pressure lower membrane cover and the low-pressure upper membrane cover are detachably connected. A communication port is provided on the side wall of the low-pressure upper membrane cover away from the low-pressure lower membrane cover. A low-pressure tray assembly is provided between the low-pressure lower membrane cover and the low-pressure upper membrane cover.

[0016] In some technical solutions of the present invention, the low-pressure tray assembly includes a pressure ring, a pressure ring nut, a low-pressure diaphragm, an upper low-pressure tray, and a lower low-pressure tray. The low-pressure diaphragm, the upper low-pressure tray, and the lower low-pressure tray are all sleeved on the pressure ring. The upper low-pressure tray and the lower low-pressure tray are placed on both sides of the low-pressure diaphragm. The clamping nut located in the lower cavity of the valve body is placed inside the pressure ring and threadedly connected to it. The clamping nut has a through hole communicating with the assembly port, and the through hole communicates with the inner cavity of the pressure ring.

[0017] Compared with the prior art, the present invention has at least the following advantages or beneficial effects:

[0018] A damper is added to prevent rapid changes in pressure signal from causing surges in the pressure regulating system. The damping value can be adjusted according to the damper's position within the valve body. The flow restrictor, through a pressure relief hole and groove, can adjust the pressure relief rate to regulate the response time of the pressure regulating system. An actuator integrated within the valve body enables rapid release, allowing for quick pressure relief under complex operating conditions while maintaining response time and accuracy. The placement of the flow restrictor, damper, and actuator within the valve body facilitates later disassembly and maintenance, improving space utilization and achieving multi-functionality. This allows for compatibility with a wider range of applications, and the gas distributor assembly enhances the device's adaptability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2This is a schematic diagram of the combined structure of the valve body and the low-pressure diaphragm cover in this invention;

[0022] Figure 3 This is a schematic diagram of the internal structure of the valve body in this invention;

[0023] Figure 4 This is a schematic diagram of the valve port installation structure in this invention;

[0024] Figure 5 This is a cross-sectional view of the overall structure of the present invention;

[0025] Figure 6 This is a cross-sectional view of the valve body and the low-pressure actuator in this invention.

[0026] Figure 7 This is a schematic diagram of the output / input port of the valve body in the invention;

[0027] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the AA direction;

[0028] Figure 9 for Figure 7 Schematic diagram of the cross-sectional structure along the BB direction;

[0029] Figure 10 for Figure 7 Schematic diagram of the cross-sectional structure along the CC direction;

[0030] Figure 11 for Figure 7 Schematic diagram of the cross-sectional structure along the DD direction.

[0031] Icons: 1. Pressure regulating diaphragm cover; 2. Pressure regulating spring; 3. Pressure regulating rod; 4. Upper nut; 5. Locking nut; 6. Upper spring seat; 7. Lower spring seat; 8. Compression nut; 9. Output port; 10. Valve body; 11. Low-pressure lower diaphragm cover; 12. Upper tray; 13. Lower tray; 14. Low-pressure lower diaphragm cover area; 15. Valve stem; 16. Valve core; 17. Valve port; 18. Quick release spring; 19. Gasket; 20. Diaphragm component; 21. Low-pressure upper tray; 22. Second exhaust port; 23. Low-pressure lower tray; 24. Pressure ring nut; 25. Closing nut; 26. Pressure ring; 27. Pipe / container interface; 28. Low-pressure upper diaphragm cover; 29. ​​Damping bolt; 30. Upper cavity of valve body; 31. Lower cavity of valve body; 32. Flow restrictor; 33. Low-pressure diaphragm; 35. Input port; 36. First exhaust port. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] Example

[0035] Please refer to Figures 1-11 As shown.

[0036] This invention provides a pilot device for a gas pressure regulator, such as... Figure 1 , Figure 2 As shown, it includes an actuator, a valve body 10, a low-pressure actuator, an actuator installed in the valve body 10, and two diaphragm elements 20, a flow limiter 32, and a damping bolt 29 installed in the valve body 10.

[0037] The specific installation structure of the valve body 10, actuator, two diaphragm elements 20, flow restrictor 32, and damping bolt 29 is as follows:

[0038] Specifically, the valve body 10 is in the shape of a hexagonal prism; one end of the valve body 10 is provided with an upper valve body cavity 30, and the other end of the valve body 10 is provided with a lower valve body cavity 31; two diaphragm elements 20 are respectively placed in the upper valve body cavity 30 and the lower valve body cavity 31, and seal the upper valve body cavity 30 and the lower valve body cavity 31.

[0039] The actuator includes two mounting holes in the valve body 10, which connect the upper cavity 30 and the lower cavity 31 of the valve body. A valve stem 15, adapted to the valve stem 15, passes through each mounting hole. Both the upper cavity 30 and the lower cavity 31 of the valve body have lower trays 13 connected to the two valve stems 15. The valve stems 15 and the lower trays 13 are connected by screws. A diaphragm 20 is fitted onto the lower tray 13, and a gasket 19 is provided between the diaphragm 20 and the lower tray 13. An upper tray 12, which abuts against the diaphragm 20, is provided on the lower tray 13. An annular groove is formed in the middle of each valve stem 15, and a sealing element, namely a sealing ring, is provided within the annular groove to prevent gas from entering the lower cavity 31 of the valve body from the upper cavity 30 through the gap between the valve stem 15 and the mounting hole. A clamping nut 8, which abuts against the upper tray 12, is provided on the lower tray 13. The clamping nut 8 is threadedly connected to the lower tray 13, and a sealing ring is provided between them to enhance the sealing effect.

[0040] The regulating mechanism includes a pipe container interface 27 opened on the outer wall of the valve body 10, the pipe is connected to the main valve, a first installation port is opened in the middle of the valve body 10 and connected to the pipe container interface 27, and a flow limiter 32 is installed in the first installation port; a first channel is opened in the valve body 10 and connected to the first installation port and the lower cavity 31 of the valve body respectively; the first channel is arranged along the axial direction of the valve body 10.

[0041] A second mounting port communicating with the upper cavity 30 of the valve body is provided on the side wall of the valve body 10; a damping bolt 29 is installed in the second mounting port; a second channel communicating with the second mounting port and the lower cavity 31 of the valve body is provided in the valve body 10; the second channel is arranged along the axial direction of the valve body 10.

[0042] The valve body 10 is provided with an inlet 35 that communicates with the lower cavity 31 of the valve body; the inlet 35 is arranged radially along the valve body 10.

[0043] The valve body 10 has an output port 9 that communicates with the lower cavity 31 of the valve body; the output port 9 is arranged radially along the valve body 10.

[0044] The valve body 10 is equipped with a control component that connects the lower chamber 31 of the valve body to the input port 35.

[0045] Preferably, the current limiter 32 is divided into multiple segments, with a central cylindrical body and two conical segments at its front end, namely a first conical segment and a second conical segment. The first conical segment, the second conical segment, and the cylindrical body are connected in sequence. The large-diameter end of the first conical segment is connected to the small-diameter end of the second conical segment, and the large-diameter end of the second conical segment is connected to the cylindrical body. The outer diameter of the large-diameter end of the second conical segment is smaller than the outer diameter of the cylindrical body. A pressure relief groove is provided on the outer wall of the first conical segment, and a pressure relief hole is provided at the connection between the first conical segment and the second conical segment. The pressure relief hole communicates with the pressure relief groove. A sealing segment is also provided on the other side of the cylindrical body, and a sealing ring is provided on the outer wall of the sealing segment. A blocking member is provided in the first mounting port to abut against the current limiter 32, and the blocking member is threadedly connected to the inner wall of the first mounting port.

[0046] Preferably, the damping bolt is divided into multiple segments, with the central part being a cylindrical column. Its front end has two frustum segments, namely a first frustum and a second frustum. The first frustum, the second frustum, and the column are connected in sequence. The large-diameter end of the first frustum is connected to the small-diameter end of the second frustum, and the large-diameter end of the second frustum is connected to the column. The outer diameter of the large-diameter end of the second frustum is smaller than the outer diameter of the column, and a sealing section is provided on the other side of the column. A sealing ring is provided on the outer wall of the sealing section.

[0047] In some technical solutions of the present invention, the control component includes a valve port 17 and a valve core 16 disposed inside the valve body 10. An inlet port communicating with an input port 35 is provided on the outer side wall of the valve port 17. The valve port 17 is connected to the lower cavity 31 of the valve body. An assembly port for the valve core 16 is provided on the lower tray 13 installed in the lower cavity 31 of the valve body. A quick-release spring 18 connected to the inner wall of the assembly port is sleeved on the valve core 16.

[0048] A closing nut 25 is fitted onto the end of the valve core 16 that is away from the valve port 17, and the closing nut 25 abuts against the inner wall of the assembly port.

[0049] In some technical solutions of the present invention, the side wall of the closing nut 25 is provided with an annular inclined surface.

[0050] Preferably, the assembly port is machined into the lower tray 13 inside the lower cavity 31 of the valve body. The assembly port is divided into multiple sections, which are sequentially interconnected: a first chamber, a second chamber, and a third chamber. The inner diameter of the first chamber is larger than that of the second chamber. The inner diameters of the second and third chambers are the same. The second and third chambers are provided with spacers to restrict the movement of the quick-release spring 18. The side of the spacer away from the second chamber has an inner conical surface that matches the outer conical surface on the closing nut 25, thereby improving the airtightness of the closing nut 25 when it contacts the spacer and improving the sealing performance of this structure.

[0051] In some technical solutions of the present invention, the actuator includes a pressure regulating diaphragm cover 1 detachably mounted on the valve body 10. The pressure regulating diaphragm cover 1 is bolted to the upper end of the valve body 10. The end of the pressure regulating diaphragm cover 1 facing away from the valve body 10 is provided with an upper nut 4 threadedly connected to it. A pressure regulating rod 3 is mounted on the upper nut 4. An upper spring seat 6 and a lower spring seat 7 are slidably mounted inside the pressure regulating diaphragm cover 1. A pressure regulating spring 2 is provided between the upper spring seat 6 and the lower spring seat 7. A locking nut 5 is provided on the upper nut 4 to lock the pressure regulating rod 3. A groove adapted to the clamping nut 8 is opened on the side wall of the lower spring seat 7 opposite to the valve body 10. The diaphragm 20, which is placed in the upper cavity 30 of the valve body, is used to apply a preload to the diaphragm 20 and to ensure that the pressure value in the valve body 10 remains relatively stable when the actuator in the valve body 10 is injected with high-pressure gas. This is achieved by using the above-mentioned structural conditions to ensure the relative position of the diaphragm 20 and the actuator in the valve body 10, and to force the diaphragm 20 in the upper cavity 30 of the valve body to reset.

[0052] Furthermore, the diaphragm 20 located in the upper cavity 30 of the valve body is placed between the pressure regulating diaphragm cover 1 and the valve body 10. The diaphragm 20 can separate the valve body 10 and the pressure regulating diaphragm cover 1 into two independent areas, thus avoiding the risk of gas leakage.

[0053] In some technical solutions of the present invention, the low-pressure actuator includes a low-pressure lower membrane cover 11 and a low-pressure upper membrane cover 28. The low-pressure lower membrane cover 11 and the low-pressure upper membrane cover 28 are detachably connected by bolts. A communication port is provided on the side wall of the low-pressure upper membrane cover 28 away from the low-pressure lower membrane cover 11. A low-pressure tray assembly is provided between the low-pressure lower membrane cover 11 and the low-pressure upper membrane cover 28.

[0054] Furthermore, the diaphragm 20 located in the lower cavity 31 of the valve body is placed between the pressure regulating diaphragm cover 1 and the valve body 10. The diaphragm 20 can separate the valve body 10 and the low-pressure lower diaphragm cover 11 into two independent areas, namely the low-pressure lower diaphragm cover area 14 and the low-pressure upper diaphragm cover area, to avoid the risk of gas leakage.

[0055] In some technical solutions of the present invention, the low-pressure tray assembly includes a pressure ring 26, a pressure ring nut 24, a low-pressure diaphragm 33, a low-pressure upper tray 21, and a low-pressure lower tray 23. The low-pressure diaphragm 33, the low-pressure upper tray 21, and the low-pressure lower tray 23 are all sleeved on the pressure ring 26. The low-pressure upper tray 21 and the low-pressure lower tray 23 are positioned on both sides of the low-pressure diaphragm 33. The pressure ring nut 24 is threadedly connected to the pressure ring 26. A clamping nut 8 located in the lower cavity 31 of the valve body is placed inside the pressure ring 26 and threadedly connected to it. The clamping nut 8 has a through hole communicating with the assembly port, and the through hole communicates with the inner cavity of the pressure ring 26. The outer edge of the low-pressure diaphragm 33 is positioned between the low-pressure lower diaphragm cover 11 and the low-pressure upper diaphragm cover 28.

[0056] In some technical solutions of the present invention, a first exhaust port 36 is provided on the side wall of the low-pressure lower tray 23. The first exhaust port 36 is used to prevent the pressure in the low-pressure sealed area formed by the low-pressure diaphragm 33, the diaphragm element 20 located in the lower cavity 31 of the valve body, the valve body 10, and the low-pressure lower tray 23 from being greater than the external pressure, thus preventing the movement of the low-pressure diaphragm 33 and the diaphragm element 20 located in the lower cavity 31 of the valve body from being obstructed, and avoiding the situation where the adjustment accuracy of the high-pressure gas in the input valve body 10 cannot be guaranteed.

[0057] In some technical solutions of the present invention, a second vent 22 is provided on the side wall of the pressure regulating diaphragm cover 1. The second vent 22 is used to prevent the diaphragm 20 in the lower cavity 31 of the valve body from being obstructed due to the pressure in the pressure regulating sealed area formed by the diaphragm 20, valve body 10 and pressure regulating diaphragm cover 1 being greater than the external pressure; and to prevent the adjustment accuracy of the high pressure gas in the input valve body 10 from being compromised.

[0058] The working principle of this equipment is as follows:

[0059] First, the high-pressure gas P1 input through the pipeline needs to be connected to the inlet 35, so that the high-pressure gas P1 enters the lower cavity 31 of the valve body through the valve port 17 connected to the inlet 35, then enters the first installation port through the first channel, and enters the main valve through the pipeline container interface 27; then enters the second installation port through the second channel; and then enters the upper cavity 30 of the valve body through the second installation port; when the vulcanized valve core 16 disengages from the valve port 17, the high-pressure gas P1, after being damped by the actuator, damping bolt 29 and flow limiter 32 in the valve body 10, enters the connecting port through the assembly port and then enters the main valve; the gas P3 located in the valve body 10 outputs low-pressure gas P2 from the outlet 9; and then enters the downstream pipeline for gas supply;

[0060] When high-pressure gas P1 is introduced into valve body 10, the pressure signals in the lower chamber 31 and upper chamber 30 of the valve body change simultaneously, which can easily cause surge in the pressure regulating system. After high-pressure gas P1 is introduced into valve body 10, it is damped by damping bolt 29 to prevent the pressure signals in the lower chamber 31 and upper chamber 30 of the valve body from changing simultaneously. The faster the pressure signal of high-pressure gas P1 changes in valve body 10, the greater the damping force generated by damping bolt 29 on high-pressure gas P1 in valve body 10, preventing the pressure signals in the lower chamber 31 and upper chamber 30 of the valve body from changing simultaneously and avoiding excessively rapid changes in their frequency. This effectively reduces surge in the pressure regulating system. By adjusting the installation position of damping bolt 29 in the second mounting port, different damping coefficients can be achieved, allowing for a wider range of adjustment of the pressure value of high-pressure gas P1 entering the second mounting port, thus helping the pressure regulating system to operate in a stable state.

[0061] Furthermore, to avoid the problem of fixed pressure relief ports and fixed pressure relief limits in conventional pressure regulators, which cannot be adjusted, this structure incorporates a flow restrictor 32 within the valve body 10. The flow restrictor 32 features a pressure relief hole and a pressure relief groove to ensure normal pressure relief operation. The pressure relief rate can also be controlled by adjusting the position of the flow restrictor 32 in the first mounting port, thereby adjusting the response time of the pressure regulating system and improving its accuracy. This allows the fluid in the lower chamber 31 of the valve body to flow to the connecting pipe / container interface 27 according to the adjustment result, and then be introduced into the main valve.

[0062] Normally, the fluid pressure in the pipe container connected to pipe container interface 27 is lower than the fluid pressure in the lower chamber 31 of the valve body. However, in special cases, when the fluid pressure in the pipe container connected to pipe container interface 27 is greater than the fluid pressure in the lower chamber 31 of the valve body, the traditional pilot valve structure is difficult to adjust, which can cause the pressure regulating system to become disordered. To solve the above problem, a valve port 17, an actuator, and an adjusting component are installed in the valve body 10 to enable the valve body 10 to quickly release fluid and avoid the valve body 10 from becoming disordered. The working process is as follows: In fact, the pressure signal in the low-pressure diaphragm cover area 14 is the same as that in the pipe container interface 27. When the pressure signal in the pipe container interface 27 is greater than that in the lower cavity 31 of the valve body, if pressure is only released through the pressure relief hole and pressure relief groove, the response time is long, which can easily affect the accuracy and efficiency of the pressure regulating system. At this time, the pressure signal in the low-pressure diaphragm cover area 14 acts on the low-pressure diaphragm 33. The low-pressure diaphragm 33 drives the pressure ring 26 and the clamping nut 8 to move closer to the valve body 10. The low-pressure diaphragm 33 transmits the force to the lower tray 13 located in the lower cavity 31 of the valve body. The lower tray 13 located in the lower cavity 31 of the valve body continues to move downward. At this time, the lower tray 13 located in the lower cavity 31 of the valve body and the closing nut 25 are misaligned, and the channel between them is opened. The pressure signal in the low-pressure diaphragm cover area 14 will be quickly released into the lower cavity 31 of the valve body to achieve the quick release function. This ensures that the pressure in the pipe container interface 27 and the pressure relief diaphragm cover area are in a balanced state, thus guaranteeing the response efficiency and accuracy of the pressure regulating system.

[0063] Furthermore, by connecting the valve stem 15 in the actuator with the diaphragm in the upper cavity 30 of the valve body and the diaphragm 20 in the lower cavity 31 of the valve body, the passage between the upper cavity 30 and the lower cavity 31 of the valve body can be sealed, ensuring that there is no risk of leakage when the pressure signal between the upper cavity 30 and the lower cavity 31 of the valve body can be adjusted by the damper, thus achieving the damping function.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pilot device for a gas pressure regulator, characterized in that, Includes the actuator, valve body (10), and low-pressure actuator; The valve body (10) has an upper cavity (30) at one end and a lower cavity (31) at the other end; both the upper cavity (30) and the lower cavity (31) are provided with diaphragms (20) adapted to them; the actuator is installed at one end of the valve body (10), and its actuating end abuts against the diaphragm (20) placed in the upper cavity (30); The low-pressure actuator is installed at the other end of the valve body (10), and its actuating end abuts against the diaphragm (20) placed in the lower cavity (31) of the valve body; an actuator is installed in the valve body (10), which is used to force the two diaphragms (20) to be linked with the actuating ends of their corresponding actuators and the actuating ends of the low-pressure actuator respectively; The valve body (10) is provided with an adjustment mechanism for adjusting the pressure in the upper chamber (30) and lower chamber (31) of the valve body; the adjustment mechanism includes a pipe container interface (27) opened on the outer wall of the valve body (10), a first installation port communicating with the pipe container interface (27) is opened on the side wall of the valve body (10), a flow limiter (32) is installed in the first installation port, a blocking member abutting against the flow limiter (32) is provided in the first installation port, and a first channel communicating with the first installation port and the lower chamber (31) of the valve body (10) is opened in the valve body (10); A second mounting port communicating with the upper cavity (30) of the valve body (10) is provided on the side wall of the valve body (10); a damping bolt (29) is installed in the second mounting port; a second channel communicating with the second mounting port and the lower cavity (31) of the valve body (10) is provided in the valve body (10); an input port (35) communicating with the lower cavity (31) of the valve body is provided on the valve body (10); an output port (9) communicating with the lower cavity (31) of the valve body is provided on the valve body (10); and a control component for controlling the communication between the lower cavity (31) of the valve body and the input port (35) is provided in the valve body (10).

2. A pilot device for a gas pressure regulator according to claim 1, characterized in that, The actuator includes two mounting holes in the valve body (10) for connecting the upper cavity (30) and the lower cavity (31) of the valve body. A valve stem (15) is inserted into each mounting hole. A lower tray (13) connected to the two valve stems (15) is provided in both the upper cavity (30) and the lower cavity (31) of the valve body. A diaphragm (20) is sleeved on the lower tray (13). An upper tray (12) abuts against the diaphragm (20) is provided on the lower tray (13). A sealing element is provided in the middle of each valve stem (15). A compression nut (8) abuts against the upper tray (12) is provided on the lower tray (13).

3. A pilot device for a gas pressure regulator according to claim 1, characterized in that, The control component includes a valve port (17) and a valve core (16) disposed in the valve body (10). The outer side wall of the valve port (17) is provided with an inlet port that communicates with the inlet port (35). The valve port (17) communicates with the lower cavity (31) of the valve body. The lower tray (13) installed in the lower cavity (31) of the valve body is provided with an assembly port that is adapted to the valve core (16). The valve core (16) is fitted with a quick-release spring (18) that is connected to the inner wall of the assembly port. The valve core (16) is fitted with a closing nut (25) at one end away from the valve port (17), and the closing nut (25) abuts against the inner wall of the assembly port.

4. A pilot device for a gas pressure regulator according to claim 2, characterized in that, The actuator includes a pressure regulating diaphragm cover (1) detachably mounted on the valve body (10). The end of the pressure regulating diaphragm cover (1) facing away from the valve body (10) is provided with an upper nut (4). A pressure regulating rod (3) is mounted on the upper nut (4). An upper spring seat (6) and a lower spring seat (7) are slidably mounted inside the pressure regulating diaphragm cover (1). A pressure regulating spring (2) is provided between the upper spring seat (6) and the lower spring seat (7). A locking nut (5) is provided on the upper nut (4) to lock the pressure regulating rod (3). A groove adapted to the clamping nut (8) is provided on the side wall of the lower spring seat (7) opposite to the valve body (10).

5. A pilot device for a gas pressure regulator according to claim 3, characterized in that, The low-pressure actuator includes a low-pressure lower membrane cover (11) and a low-pressure upper membrane cover (28). The low-pressure lower membrane cover (11) and the low-pressure upper membrane cover (28) are detachably connected. The low-pressure upper membrane cover (28) has a communication port on its side wall away from the low-pressure lower membrane cover (11). A low-pressure tray assembly is provided between the low-pressure lower membrane cover (11) and the low-pressure upper membrane cover (28).

6. A pilot device for a gas pressure regulator according to claim 5, characterized in that, The low-pressure tray assembly includes a pressure ring (26), a pressure ring nut (24), a low-pressure diaphragm (33), a low-pressure upper tray (21), and a low-pressure lower tray (23). The low-pressure diaphragm (33), the low-pressure upper tray (21), and the low-pressure lower tray (23) are all sleeved on the pressure ring (26). The low-pressure upper tray (21) and the low-pressure lower tray (23) are placed on both sides of the low-pressure diaphragm (33). The clamping nut (8) located in the lower cavity (31) of the valve body is placed in the pressure ring (26) and threadedly connected to it. The clamping nut (8) has a through hole that communicates with the assembly port. The through hole communicates with the inner cavity of the pressure ring (26).

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