Natural gas working pressure regulating valve

Abstract

The invention provides a natural gas working pressure regulating valve, which relates to the technical field of natural gas, and comprises a valve seat, the gas outlet end of the valve seat is communicated with a gas outlet pipe, the upper end of the valve seat is provided with a mounting bracket, the inner bottom surface of the mounting bracket is fixedly connected with a valve body, the top end of the mounting bracket is provided with an actuating mechanism, and the control end of the actuating mechanism is communicated with the gas outlet pipe through a control gas circuit; the output end of the executing mechanism is fixedly connected with an output shaft, the output shaft slidably penetrates through the upper top face of the mounting support in the vertical direction, the lower end of the output shaft is fixedly connected with an adjusting assembly, a first spring is fixedly connected between the lower end of the adjusting assembly and the upper surface of the valve body, and the lower end of the adjusting assembly is fixedly connected with a valve rod which slidably penetrates through the valve body in the vertical direction. The lower end of the valve rod extends into the valve seat and is fixedly connected with a valve element. The defects that in the prior art, an external executing mechanism is single in function, the working pressure regulating valve cannot be controlled in real time through the external executing mechanism, and the pressure of natural gas after passing through the working pressure regulating valve is kept stable are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of natural gas, and in particular to a natural gas working pressure regulating valve. Background Art

[0002] The valves used in natural gas pressure regulating devices mainly include safety shut-off valves, monitoring pressure regulating valves and working pressure regulating valves. Among them, the working pressure regulating valve undertakes the main pressure regulation task to ensure the stable pressure in the downstream pipeline. With the rapid increase of domestic natural gas transmission pipelines.

[0003] Currently, the pressure of the natural gas pipeline is controlled by an external actuator, which has a single function. Due to the complex working conditions of the natural gas pipeline, it is impossible to control the working pressure regulating valve through the external actuator in real time to maintain a stable pressure of the natural gas after passing through the working pressure regulating valve. Summary of the Invention

[0004] The present invention provides a natural gas working pressure regulating valve to solve the defect in the prior art that the external actuator has a single function and cannot control the working pressure regulating valve in real time through the external actuator to maintain a stable pressure of natural gas after passing through the working pressure regulating valve.

[0005] The present invention provides a natural gas working pressure regulating valve, comprising a valve seat, an air outlet end of the valve seat is connected to the air outlet pipe, a mounting bracket is installed on the upper end of the valve seat, the inner bottom surface of the mounting bracket is fixedly connected to the valve body, an actuator is installed on the top of the mounting bracket, a control end of the actuator is connected to the air outlet pipe through a control air path, an output end of the actuator is fixedly connected to an output shaft, the output shaft slides in the up and down directions and passes through the upper top surface of the mounting bracket, the lower end of the output shaft is fixedly connected to an adjusting component, a spring is fixedly connected between the lower end of the adjusting component and the upper surface of the valve body, the lower end of the adjusting component is fixedly connected to a valve stem, the valve stem slides in the up and down directions and passes through the valve body, the lower end of the valve stem extends into the interior of the valve seat, and the lower end of the valve body is fixedly connected to a valve core.

[0006] Preferably, the control air circuit includes: air duct one, a condenser and air duct two, the air inlet end of air duct one is connected to the air outlet pipe, the air inlet end of the condenser is connected to the air outlet end of air duct one, the air inlet end of air duct two is connected to the air outlet end of the condenser, and the air outlet end of air duct two is connected to the actuator.

[0007] Preferably, the actuator includes a diaphragm box, in which a horizontally arranged rubber diaphragm is installed, and the output shaft is fixedly connected to the lower surface of the rubber diaphragm, and the output shaft extends from the lower end of the diaphragm box.

[0008] Preferably, the adjustment component includes an adjustment frame, an adjustment cavity is provided inside the adjustment frame, a rotating table is fixedly connected to the bottom surface of the adjustment cavity, the upper end of the rotating table is rotatably connected to gear 1, the upper end of gear 1 is fixedly connected to a control turntable, the control turntable is mounted on the outside of the output shaft, gear 1 is respectively engaged with several groups of lifting components, the lifting components are all fixedly connected to the upper surface of the adjustment block, and the upper end of spring 1 is fixedly connected to the lower surface of the adjustment block.

[0009] Preferably, a plurality of threaded holes are provided on the lower side wall of the adjusting chamber, and each threaded block corresponds to a group of lifting components. The lifting components include: a threaded block, gear 2 and a positioning column. Gear 2 is fixedly connected to the upper surface of the threaded block, the threaded block is threadedly connected in the threaded hole, the lower surface of the threaded block is fixedly connected to the upper surface of the adjusting block, a positioning hole is provided on the top surface of gear 2, the positioning column is fixedly connected to the top surface of the adjusting chamber, and the positioning column slides in the positioning hole in the up and down directions.

[0010] Preferably, the adjustment assembly also includes several groups of locking assemblies, the locking assembly includes a locking block, the side wall of the locking block is fixedly connected to the limiting block 1, the lower part of the locking block is rotatably fitted with the limiting block 2, a spring 2 is fixedly connected between the limiting block 2 and the top surface of the adjustment cavity, the spring 2 is fitted on the outside of the locking block 2, and the upper end of the locking block 2 is fixedly connected to a handle.

[0011] Preferably, the regulating component further includes an operation monitoring system, which includes:

[0012] Pressure monitoring module, used to monitor the real-time pressure of the outlet pipe;

[0013] Aging monitoring module, used to evaluate the aging degree of the pressure regulating valve and determine whether the pressure regulating valve needs to be repaired;

[0014] The adjustment guidance module is used to generate a corresponding adjustment plan based on the input target adjustment pressure.

[0015] Preferably, the aging monitoring module includes:

[0016] A data calling unit is used to call historical pressure detection values ​​of the outlet pipe;

[0017] An evaluation parameter calculation unit, used for calculating an aging evaluation parameter of the pressure regulating valve;

[0018] Among them, G is the aging evaluation parameter of the pressure regulating valve; α and β are the weighted calculation coefficients of regulation accuracy and regulation stability respectively; M is the total number of historical pressure detection values ​​of the outlet pipe; P B is the set pressure value of the pressure regulating valve; P Si is the actual value of the historical pressure detection value of the i-th group of outlet pipes; P S is the preset maximum allowable pressure fluctuation value of the outlet pipe; || is the absolute value symbol;

[0019] The maintenance judgment unit determines that the pressure regulating valve needs maintenance when the aging assessment parameter of the pressure regulating valve is greater than a preset maintenance threshold value, and otherwise determines that the pressure regulating valve does not need maintenance.

[0020] Preferably, the adjustment guidance module includes:

[0021] A pressure setting unit, used for inputting a set pressure value;

[0022] The feedback judgment unit is used to monitor the actual pressure value in the outlet pipe and compare it with the set target pressure. When the difference between the set pressure value and the actual pressure value in the outlet pipe is greater than the adjustment threshold, the valve is adjusted; otherwise, the valve is not adjusted;

[0023] A plan generating unit is used to generate an adjustment plan.

[0024] Preferably, the solution generation unit generates the adjustment solution based on the following method:

[0025] Step S1: Calculate the target rotation angle of the control dial

[0026] Where θ is the target rotation angle of the control turntable; Z1 is the number of teeth on gear 1; Z2 is the number of teeth on gear 2; P B is the set pressure value of the pressure regulating valve; A F is the flow cross-sectional area of ​​the valve seat; k is the spring constant; A X is the leakage area of ​​the valve seat; P S is the actual pressure value in the outlet pipe; L is the current drop height of the regulating block; D is the pitch of the thread on the thread block;

[0027] Step S2: Determine whether the target rotation angle of the control dial is within the allowable rotation angle range of the control dial. If the target rotation angle of the control dial is within the allowable rotation angle range of the control dial, the adjustment plan is to rotate the control dial to the target rotation angle. Otherwise, a fault report is generated that the input target adjustment pressure cannot be achieved.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention combines the actuator with the natural gas pipeline and adjusts the pressure regulating valve by controlling the pressure change of the gas path. This can accurately control the gas pressure and ensure that the pressure regulating valve quickly responds to the changes in the controlled gas path, achieving a precise pressure regulation function and ensuring the stability of the natural gas pressure. The setting of the regulating component provides a multi-stage regulation mode, which can achieve more precise pressure regulation. The setting of the locking component provides an effective locking and protection mechanism to prevent the regulating component from being affected by accidental operation during use, thereby increasing the safety of the equipment.

[0030] (2) The present invention uses an aging monitoring module to assess the aging degree of the pressure regulating valve. Combined with historical pressure detection values, it can accurately assess the service life of the pressure regulating valve. When the aging assessment parameter exceeds a preset threshold, the system can automatically determine whether the pressure regulating valve requires maintenance, thereby reducing downtime caused by equipment failure and improving equipment reliability and life management efficiency.

[0031] By setting up the feedback judgment unit, it is possible to automatically determine whether valve adjustment is required, thereby directly omitting the process of generating an adjustment plan when valve adjustment is not required, thus avoiding waste of computing power and human resources. The plan generation unit can automatically generate an adjustment plan that meets the requirements based on a preset calculation method, and calculate the target rotation angle of the control dial 17. This ability to automatically generate plans greatly simplifies the operating process and improves the adjustment efficiency, while avoiding manual operation errors. During the plan generation process, if the target adjustment pressure cannot be achieved, a fault report will be generated. This adaptive fault warning mechanism can detect potential risks in a timely manner before problems occur, conduct warnings and adjustments, and ensure the continuity and stability of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 yes Figure 1 Enlarged schematic diagram of point A in the middle.

[0035] Reference numerals:

[0036] 1. Valve seat; 2. Air outlet pipe; 3. Valve body; 4. Mounting bracket; 5. Output shaft; 6. Spring 1; 7. Valve stem; 8. Valve core; 9. Air bleed pipe 1; 10. Condenser; 11. Air bleed pipe 2; 12. Diaphragm box; 13. Adjustment frame; 14. Adjustment chamber; 15. Turntable; 16. Gear 1; 17. Control dial; 18. Adjustment block; 19. Threaded block; 20. Gear 2; 21. Positioning column; 22. Positioning hole; 23. Locking block; 24. Limit block 1; 25. Limit block 2; 26. Spring 2; 27. Handle. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0038] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] Example 1

[0040] The embodiment of the present invention provides a natural gas working pressure regulating valve, such as Figure 1-2 As shown, it includes a valve seat 1, the air outlet end of the valve seat 1 is connected to the air outlet pipe 2, a mounting bracket 4 is installed on the upper end of the valve seat 1, the inner bottom surface of the mounting bracket 4 is fixedly connected to the valve body 3, an actuator is installed on the top of the mounting bracket 4, the control end of the actuator is connected to the air outlet pipe 2 through the control air path, the output end of the actuator is fixedly connected to the output shaft 5, the output shaft 5 slides along the up and down directions through the upper top surface of the mounting bracket 4, the lower end of the output shaft 5 is fixedly connected to the adjusting component, a spring 6 is fixedly connected between the lower end of the adjusting component and the upper surface of the valve body 3, the lower end of the adjusting component is fixedly connected to the valve stem 7, the valve stem 7 slides along the up and down directions through the valve body 3, the lower end of the valve stem 7 extends into the interior of the valve seat 1, and the lower end of the valve body 3 is fixedly connected to the valve core 8.

[0041] Preferably, the control air circuit includes: air duct 1 9, condenser 10 and air duct 2 11, the air inlet end of air duct 1 9 is connected to the air outlet pipe 2, the air inlet end of the condenser 10 is connected to the air outlet end of air duct 1 9, the air inlet end of air duct 2 11 is connected to the air outlet end of the condenser 10, and the air outlet end of air duct 2 11 is connected to the actuator.

[0042] Preferably, the actuator includes a diaphragm box 12 , in which a horizontally arranged rubber diaphragm is installed. The output shaft 5 is fixedly connected to the lower surface of the rubber diaphragm, and the output shaft 5 extends from the lower end of the diaphragm box 12 .

[0043] Preferably, the adjustment component includes an adjustment frame 13, an adjustment chamber 14 is provided inside the adjustment frame 13, a rotating table 15 is fixedly connected to the bottom surface of the adjustment chamber 14, a gear 16 is rotatably connected to the upper end of the rotating table 15, a control turntable 17 is fixedly connected to the upper end of the gear 16, the control turntable 17 is sleeved on the outside of the output shaft 5, the gear 16 is respectively engaged with several groups of lifting components, the lifting components are all fixedly connected to the upper surface of the adjustment block 18, and the upper end of the spring 16 is fixedly connected to the lower surface of the adjustment block 18.

[0044] Preferably, a plurality of threaded holes are provided on the lower side wall of the adjusting chamber 14, and each threaded block 19 corresponds to a group of lifting components. The lifting components include: a threaded block 19, a gear 20 and a positioning column 21. The gear 20 is fixedly connected to the upper surface of the threaded block 19, and the threaded block 19 is threadedly connected in the threaded hole. The lower surface of the threaded block 19 is fixedly connected to the upper surface of the adjusting block 18. A positioning hole 22 is provided on the top surface of the gear 20. The positioning column 21 is fixedly connected to the top surface of the adjusting chamber 14, and the positioning column 21 slides in the positioning hole 22 in the up and down directions.

[0045] Preferably, the adjustment assembly also includes several groups of locking assemblies, the locking assembly including a locking block 23, the side wall of the locking block 23 is fixedly connected to the limiting block 1 24, the lower part of the locking block 23 is rotatably fitted with the limiting block 25, and a spring 26 is fixedly connected between the limiting block 25 and the top surface of the adjustment chamber 14. The spring 26 is fitted on the outside of the locking block 23, and the upper end of the locking block 23 is fixedly connected to a handle 27.

[0046] The beneficial effects of the above technical solution are:

[0047] When the air pressure in the outlet pipe 2 does not meet the set requirements, the rubber diaphragm will be deformed under the action of the pressure difference until a mechanical balance is achieved between the rubber diaphragm and the spring. The position of the valve core 8 is then changed through the transmission action of the output shaft 5, and the flow area in the valve seat 1 is adjusted, thereby achieving the pressure regulation effect.

[0048] When it is necessary to adjust the working pressure of the pressure regulating valve, the staff first manually pulls up the handle 27 to move the locking block 23 upward, and then rotates the locking block 23 to make the lower surface of the limit block 24 contact the upper surface of the adjustment frame 13, thereby preventing the locking block 23 from rebounding under the action of the spring 26. Then, by rotating the control dial 17, the gear 16 is driven to rotate, and then the threaded block 19 is driven to rotate through the meshing action of the gear 16 and the gear 2 20, thereby adjusting the height of the adjusting block 18, realizing the adjustment of the preload force of the spring 16, and thus realizing the function of adjusting the working pressure of the pressure regulating valve.

[0049] By integrating an actuator with a natural gas pipeline and adjusting the pressure-regulating valve by controlling changes in gas pressure, the present invention precisely controls gas pressure and ensures the valve rapidly responds to changes in the controlled gas path, achieving precise pressure regulation and ensuring stable natural gas pressure. The multi-stage adjustment provided by the adjustment component enables more precise pressure regulation. The locking component provides an effective locking and protection mechanism, preventing the adjustment component from being affected by accidental operation during use and enhancing the safety of the device.

[0050] Example 2

[0051] Based on Example 1, the adjustment component further includes an operation monitoring system, which includes:

[0052] A pressure monitoring module, used to monitor the real-time pressure of the outlet pipe 2;

[0053] Aging monitoring module, used to evaluate the aging degree of the pressure regulating valve and determine whether the pressure regulating valve needs to be repaired;

[0054] The adjustment guidance module is used to generate a corresponding adjustment plan based on the input target adjustment pressure.

[0055] Preferably, the aging monitoring module includes:

[0056] A data calling unit, used to call historical pressure detection values ​​of the outlet pipe 2;

[0057] An evaluation parameter calculation unit, used for calculating an aging evaluation parameter of the pressure regulating valve;

[0058] Where G is the aging evaluation parameter of the pressure regulating valve; α and β are the weighted calculation coefficients of regulation accuracy and regulation stability respectively; M is the total number of historical pressure detection values ​​of the outlet pipe 2; P B is the set pressure value of the pressure regulating valve; P Si is the actual value of the historical pressure detection value of the i-th group of outlet pipes 2; P S is the preset maximum allowable pressure fluctuation value of the outlet pipe 2; || is the absolute value symbol;

[0059] The maintenance judgment unit determines that the pressure regulating valve needs maintenance when the aging assessment parameter of the pressure regulating valve is greater than a preset maintenance threshold value, and otherwise determines that the pressure regulating valve does not need maintenance.

[0060] Preferably, the adjustment guidance module includes:

[0061] A pressure setting unit, used for inputting a set pressure value;

[0062] The feedback judgment unit is used to monitor the actual pressure value in the outlet pipe 2 and compare it with the set target pressure. When the difference between the set pressure value and the actual pressure value in the outlet pipe 2 is greater than the adjustment threshold, the valve is adjusted; otherwise, the valve is not adjusted;

[0063] A plan generating unit is used to generate an adjustment plan.

[0064] Preferably, the solution generation unit generates the adjustment solution based on the following method:

[0065] Step S1: Calculate the target rotation angle of the control dial 17

[0066] Wherein, θ is the target rotation angle of the control turntable 17; Z1 is the number of teeth of gear 1; Z2 is the number of teeth of gear 2; P B is the set pressure value of the pressure regulating valve; A F is the flow cross-sectional area of ​​valve seat 1; k is the spring constant of spring 1; A X is the leakage area of ​​valve seat 1; P S is the actual pressure value in the outlet pipe 2; L is the current drop height of the regulating block; D is the pitch of the thread on the thread block;

[0067] Step S2: Determine whether the target rotation angle of the control dial 17 is within the allowable rotation angle range of the control dial 17. If the target rotation angle of the control dial 17 is within the allowable rotation angle range of the control dial 17, the adjustment plan is to rotate the control dial 17 to the target rotation angle, otherwise a fault report is generated that the input target adjustment pressure cannot be achieved.

[0068] In this embodiment, the leakage area of ​​the valve seat 1 is the area of ​​the leakage channel when the valve is closed.

[0069] The beneficial effects of the above technical solution are:

[0070] This invention uses an aging monitoring module to assess the aging degree of the pressure regulating valve. Combined with historical pressure test values, it can accurately estimate the service life of the pressure regulating valve. When the aging assessment parameter exceeds a preset threshold, the system automatically determines whether the pressure regulating valve requires maintenance, reducing downtime caused by equipment failure and improving equipment reliability and life management efficiency.

[0071] By setting up the feedback judgment unit, it is possible to automatically determine whether valve adjustment is required, thereby directly omitting the process of generating an adjustment plan when valve adjustment is not required, thus avoiding waste of computing power and human resources. The plan generation unit can automatically generate an adjustment plan that meets the requirements based on a preset calculation method, and calculate the target rotation angle of the control dial 17. This ability to automatically generate plans greatly simplifies the operating process and improves the adjustment efficiency, while avoiding manual operation errors. During the plan generation process, if the target adjustment pressure cannot be achieved, a fault report will be generated. This adaptive fault warning mechanism can detect potential risks in a timely manner before problems occur, conduct warnings and adjustments, and ensure the continuity and stability of system operation.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A natural gas working pressure regulating valve, characterized in that: The invention comprises a valve seat (1), wherein the air outlet end of the valve seat (1) is connected to the air outlet pipe (2), the upper end of the valve seat (1) is installed with a mounting bracket (4), the inner bottom surface of the mounting bracket (4) is fixedly connected to the valve body (3), the top of the mounting bracket (4) is installed with an actuator, the control end of the actuator is connected to the air outlet pipe (2) through the control air path, the output end of the actuator is fixedly connected with an output shaft (5), the output shaft (5) slides through the upper top surface of the mounting bracket (4) in the up-down direction, the lower end of the output shaft (5) is fixedly connected with an adjusting component, a spring (6) is fixedly connected between the lower end of the adjusting component and the upper surface of the valve body (3), the lower end of the adjusting component is fixedly connected with a valve stem (7), the valve stem (7) slides through the valve body (3) in the up-down direction, the lower end of the valve stem (7) extends into the interior of the valve seat (1), and the lower end of the valve body (3) is fixedly connected with a valve core (8).

2. A natural gas working pressure regulating valve according to claim 1, characterized in that: The control air circuit includes: an air bleed pipe (9), a condenser (10) and an air bleed pipe (11), the air inlet end of the air bleed pipe (9) is connected to the air outlet pipe (2), the air inlet end of the condenser (10) is connected to the air outlet end of the air bleed pipe (9), the air inlet end of the air bleed pipe (11) is connected to the air outlet end of the condenser (10), and the air outlet end of the air bleed pipe (11) is connected to the actuator.

3. A natural gas working pressure regulating valve according to claim 1, characterized in that: The actuator comprises a diaphragm box (12), a horizontally arranged rubber diaphragm is installed in the diaphragm box (12), the output shaft (5) is fixedly connected to the lower surface of the rubber diaphragm, and the output shaft (5) extends from the lower end of the diaphragm box (12).

4. A natural gas working pressure regulating valve according to claim 1, characterized in that: The adjustment component includes an adjustment frame (13), an adjustment cavity (14) is provided inside the adjustment frame (13), a rotating platform (15) is fixedly connected to the bottom surface of the adjustment cavity (14), the upper end of the rotating platform (15) is rotatably connected to a gear 1 (16), the upper end of the gear 1 (16) is fixedly connected to a control turntable (17), the control turntable (17) is sleeved on the outside of the output shaft (5), the gear 1 (16) is respectively engaged with a plurality of lifting components, the lifting components are all fixedly connected to the upper surface of the adjustment block (18), and the upper end of the spring 1 (6) is fixedly connected to the lower surface of the adjustment block (18).

5. A natural gas working pressure regulating valve according to claim 4, characterized in that: A plurality of threaded holes are provided on the lower side wall of the adjustment chamber (14), and each threaded block (19) corresponds to a group of lifting components; The lifting assembly comprises: a threaded block (19), a second gear (20) and a positioning column (21); the second gear (20) is fixedly connected to the upper surface of the threaded block (19); the threaded block (19) is threadedly connected in a threaded hole; the lower surface of the threaded block (19) is fixedly connected to the upper surface of the adjustment block (18); a positioning hole (22) is provided on the top surface of the second gear (20); the positioning column (21) is fixedly connected to the top surface of the adjustment cavity (14); and the positioning column (21) slides in the positioning hole (22) along the up and down directions.

6. A natural gas working pressure regulating valve according to claim 4, characterized in that: The adjustment assembly further comprises a plurality of locking assemblies, wherein the locking assemblies comprise a locking block (23), a side wall of the locking block (23) being fixedly connected to a limiting block 1 (24), a lower portion of the locking block (23) being rotatably fitted with a limiting block 2 (25), a spring 2 (26) being fixedly connected between the limiting block 2 (25) and the inner top surface of the adjustment chamber (14), the spring 2 (26) being fitted onto the outside of the locking block 2 (23), and a handle (27) being fixedly connected to the upper end of the locking block 2 (23).

7. A natural gas working pressure regulating valve according to claim 4, characterized in that: The regulating component also includes an operation monitoring system, and the operation monitoring system includes: A pressure monitoring module, used for monitoring the real-time pressure of the air outlet pipe (2); Aging monitoring module, used to evaluate the aging degree of the pressure regulating valve and determine whether the pressure regulating valve needs to be repaired; The adjustment guidance module is used to generate a corresponding adjustment plan based on the input target adjustment pressure.

8. A natural gas working pressure regulating valve according to claim 7, characterized in that: The aging monitoring module includes: A data calling unit, used for calling historical pressure detection values ​​of the outlet pipe (2); An evaluation parameter calculation unit, used for calculating an aging evaluation parameter of the pressure regulating valve; Wherein, G is the aging evaluation parameter of the pressure regulating valve; α and β are weighted calculation coefficients of regulation accuracy and regulation stability respectively; M is the total number of historical pressure detection values ​​of the outlet pipe (2); P B is the set pressure value of the pressure regulating valve; P Si is the actual value of the historical pressure detection value of the i-th group of outlet pipes (2); P S is the maximum allowable pressure fluctuation value of the preset outlet pipe (2); || is the absolute value symbol; The maintenance judgment unit determines that the pressure regulating valve needs maintenance when the aging assessment parameter of the pressure regulating valve is greater than a preset maintenance threshold value, and otherwise determines that the pressure regulating valve does not need maintenance.

9. A natural gas working pressure regulating valve according to claim 7, characterized in that: The adjustment guidance module includes: A pressure setting unit, used for inputting a set pressure value; A feedback judgment unit is used to monitor the actual pressure value in the outlet pipe (2) and compare it with the set target pressure. When the difference between the set pressure value and the actual pressure value in the outlet pipe (2) is greater than the adjustment threshold, the valve is adjusted; otherwise, the valve is not adjusted; A plan generating unit is used to generate an adjustment plan.

10. A natural gas working pressure regulating valve according to claim 9, characterized in that: The solution generation unit generates an adjustment solution based on the following method: Step S1: Calculate the target rotation angle of the control dial (17) Wherein, θ is the target rotation angle of the control turntable (17); Z1 is the number of teeth of gear 1; Z2 is the number of teeth of gear 2; P B is the set pressure value of the pressure regulating valve; A F is the flow cross-sectional area of ​​the valve seat (1); k is the spring constant of spring 1; A X is the leakage area of ​​the valve seat (1); P S is the actual pressure value in the air outlet pipe (2); L is the current drop height of the regulating block; D is the pitch of the thread on the thread block; Step S2: determining whether the target rotation angle of the control dial (17) is within the allowable rotation angle range of the control dial (17); if the target rotation angle of the control dial (17) is within the allowable rotation angle range of the control dial (17), the adjustment solution is to rotate the control dial (17) to the target rotation angle; otherwise, a fault report is generated indicating that the input target adjustment pressure cannot be achieved.

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