Dual-pressure cut-off device of gas pressure regulator
By injecting inert gas into the gas pressure regulator to achieve automatic dual-pressure cutoff, the problem of damage to the gas pressure regulator and downstream equipment caused by overpressure or underpressure is solved, ensuring safe operation of the equipment and normal use by users.
Patent Information
- Application Number
- CN202511151852.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-18
- Publication Date
- 2025-11-25
AI Technical Summary
The existing gas pressure regulator's shut-off device fails to effectively protect the gas pressure regulator and downstream equipment from upstream pressure overpressure and underpressure, resulting in equipment damage and abnormal user operation.
A dual-pressure cutoff device for a gas pressure regulator is designed. By injecting standard high-pressure and low-pressure inert gases into the second and third inner chambers respectively, the device achieves automatic dual-pressure cutoff through the linkage of various components, ensuring the safe operation of the gas pressure regulator and downstream equipment.
It effectively prevents damage to gas pressure regulators and downstream equipment due to overpressure or underpressure, extends equipment lifespan, and ensures normal operation for users.
Smart Images
Figure CN121007233A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of gas valve, more particularly, it relates to a kind of gas pressure regulator dual-pressure cut-off device. BACKGROUND
[0002] Gas pressure regulator is also called pressure reducing valve or gas pressure regulating valve, which is a device that automatically changes the gas flow through the regulating valve to maintain the specified pressure at the outlet. The safety protection device of gas pressure regulator is mainly the cut-off device, which is mainly for safety relief and gas pressure regulator outlet pressure feedback overpressure or pressure loss cut-off.
[0003] However, the existing technology for gas pressure regulating valve cut-off device does not consider the safety impact of gas pressure regulator inlet pressure on pressure regulating equipment and downstream equipment. Overpressure supply of upstream pressure can cause damage to the gas pressure regulator, which can cause overpressure operation of downstream equipment, even burst pipes and leakage, with unpredictable consequences. At the same time, the loss of pressure of the discharged gas will affect the normal use of the user. SUMMARY
[0004] To overcome the shortcomings of the prior art, the present application provides a kind of gas pressure regulator dual-pressure cut-off device, by respectively injecting standard high-pressure inert gas and standard low-pressure inert gas into the second inner cavity and the third inner cavity, when the first connecting pipe internal gas continues high pressure, and when the second connecting pipe internal delivery cavity discharges gas loss of pressure, through the linkage between each component, realize dual-pressure automatic cut-off, improve the service life of gas pressure regulator and downstream equipment.
[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:
[0006] A kind of gas pressure regulator dual-pressure cut-off device, comprising a gas pressure regulator and an overpressure cut-off part and a pressure loss cut-off part respectively fixedly installed at the gas inlet end and the gas outlet end of the gas pressure regulator;The overpressure cut-off part includes a first connecting pipe;The first connecting pipe inner wall is fixed with a first annular pipe;The first connecting pipe is internally fixedly installed with a sealing air bag coaxially arranged;The pressure loss cut-off part includes a second connecting pipe;The second connecting pipe is internally fixed with an inner tube coaxially arranged;The inner tube is sealed at both ends;The second connecting pipe and the inner tube form a delivery cavity;The inner tube inner wall is fixed with a second annular pipe;The second annular pipe inner wall is fixed with a second annular diaphragm;The second annular pipe inner wall in the delivery cavity is uniformly provided with a second gas-permeable hole;The second connecting pipe inner wall and the second annular pipe outer wall are fixedly connected with a ring-shaped baffle.
[0007] The application is further provided with: the gas pressure regulator inlet and outlet are respectively connected with high-pressure gas inlet pipe and low-pressure gas outlet pipe; the high-pressure gas inlet pipe and low-pressure gas outlet pipe are fixed with first connection flange at the end, and the inner wall is provided with internal thread; the first connection pipe and second connection pipe are respectively connected with plug-in pipe which is inserted into the high-pressure gas inlet pipe and low-pressure gas outlet pipe; the plug-in pipe is fixed with second connection flange on the side; the plug-in pipe is provided with external thread on the outer wall.
[0008] The application is further provided with: the high-pressure gas inlet pipe and low-pressure gas outlet pipe are respectively provided with first annular sealing groove, and the inner wall is provided with second annular sealing groove; the plug-in pipe is fixed with rubber sealing ring at the end; the plug-in pipe is provided with annular groove on the outer wall; the inner wall of the annular groove is provided with third annular diaphragm; the plug-in pipe is provided with L-shaped pipe which is connected with the annular groove; the L-shaped pipe is connected with air nozzle at the end.
[0009] The application is further provided with: the first annular pipe is provided with first air hole on the side; the first connection pipe is provided with annular cavity; the first annular pipe is fixed with first annular diaphragm; the first connection pipe is fixed with piston cylinder; the piston cylinder is connected with gas pipe; the piston cylinder is provided with piston plate; the piston plate is fixed with return spring.
[0010] The application is further provided with: the piston cylinder is provided with through hole on the side; the piston plate is provided with T-shaped channel; the piston cylinder is fixed with support ring; the first branch pipe and second branch pipe are respectively connected with the air bag; the piston cylinder is connected with support column; the T-shaped channel and first branch pipe are fixed with gas hose.
[0011] The application is further provided with: the first connection pipe is fixed with piston pipe; the piston pipe is provided with piston block; the piston pipe is connected with support pipe; the piston pipe is provided with exhaust pipe; the support pipe and exhaust pipe are provided with one-way valve.
[0012] The piston pipe top is provided with a screw pipe extending outward through the first connecting pipe; the screw pipe is internally screwed with a screw rod matched with the piston block in rotation; the screw rod top is fixed with a handle; the first connecting pipe outer wall is fixedly installed with an arc plate; the arc plate circumferential surface is fixedly installed with a micro high-pressure air pump; the micro high-pressure air pump is installed with a controller; the first annular pipe inner top is installed with a pressure sensor; the controller input end is electrically connected with the pressure sensor, and the output end is electrically connected with the micro high-pressure air pump; the micro high-pressure air pump suction end is fixed with a suction pipe extending into the first connecting pipe interior, and the exhaust end is fixed with a conveying pipe extending into the first connecting pipe interior and fixedly connected with the second branch pipe.
[0013] The first annular diaphragm divides the first annular pipe into a first inner cavity and a second inner cavity from inside to outside; the second annular diaphragm divides the second annular pipe into a third inner cavity and a fourth inner cavity from inside to outside; the second inner cavity and the third inner cavity are both filled with inert gas.
[0014] The application has the advantages that:
[0015] 1. The inert gas with standard high pressure is injected into the second inner cavity, the first annular diaphragm is inflated and supported on the first inner cavity bottom surface, when the gas passing through the first connecting pipe continuously over-pressurizes, the gas enters the first inner cavity through the first gas permeable hole, gradually extrudes the first annular diaphragm, until the first annular diaphragm is supported on the second inner cavity top, in this process, the inert gas in the second inner cavity enters the piston cylinder to extrude the piston plate to descend, so that the through hole and the T-shaped channel are in conduction, the over-pressurized gas enters the plugging air bag through the T-shaped channel, so that the internal pressure of the plugging air bag and the first connecting pipe interior keep balance, which is convenient for subsequent rapid inflation of the plugging air bag, the inflated plugging air bag blocks the first annular pipe, the over-pressurized automatic cutting of the first connecting pipe is completed, and the service life of the gas pressure regulator and downstream equipment is improved.
[0016] 2. The inert gas with standard low pressure is injected into the third inner cavity, so that the second annular diaphragm is inflated and supported on the fourth inner cavity top, blocks the second gas permeable hole, and cooperates with the annular baffle to complete the plugging of the conveying cavity in the second connecting pipe, only when the gas discharged from the conveying cavity is higher than the standard low pressure, the gas enters the fourth inner cavity through the second gas permeable hole, so that the second annular diaphragm is separated from the fourth inner cavity top, the conveying cavity is opened, and the pressure loss of the discharged gas does not affect the normal use of the downstream equipment. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a structural schematic view of the gas pressure regulator double-pressure cutting device.
[0018] Figure 2Structure diagram of the normal view angle of the application. Figure 1 Structure diagram of the normal view angle of the application.
[0019] Figure 3 Structure diagram of the gas pressure regulator of the application.
[0020] Figure 4 Structure diagram of the normal view angle of the application. Figure 3 Structure diagram of the normal view angle of the application.
[0021] Figure 5 Structure diagram of the normal view angle of the application.
[0022] Figure 6 Structure diagram of the normal view angle of the application. Figure 5 Structure diagram of the normal view angle of the application.
[0023] Figure 7 Structure diagram of the normal view angle of the application. Figure 5 Structure diagram of the normal view angle of the application.
[0024] Figure 8 Structure diagram of the normal view angle of the application.
[0025] Figure 9 Structure diagram of the normal view angle of the application. Figure 8 Structure diagram of the normal view angle of the application.
[0026] In the figure: 1, gas pressure regulator; 2, overpressure cut end; 3, pressure cut-off; 4, first connecting pipe; 5, first annular pipe; 6, plugging air bag; 7, second connecting pipe; 8, inner pipe; 9, conveying cavity; 10, second annular pipe; 11, second annular diaphragm; 12, second air hole; 13, annular baffle; 14, high-pressure gas inlet pipe; 15, low-pressure gas outlet pipe; 16, first connecting flange; 17, inner thread; 18, plug-in pipe; 19, second connecting flange; 20, outer thread; 21, first annular sealing groove; 22, second annular sealing groove; 23, rubber sealing ring; 24, annular groove; 25, third annular diaphragm; 26, L-shaped pipe; 27, air nozzle; 28, first air hole; 29, annular cavity; 30, first annular diaphragm; 31, piston cylinder; 32, gas conveying pipe; 33, piston plate; 34, return spring; 35, through hole; 36, T-shaped channel; 37, support ring; 38, first branch pipe; 39, second branch pipe; 40, gas conveying hose; 41, piston pipe; 42, piston block; 43, support pipe; 44, exhaust pipe; 45, screw pipe; 46, screw rod; 47, handle; 48, arc plate; 49, micro high-pressure air pump; 50, air suction pipe; 51, conveying pipe; 52, first inner cavity; 53, second inner cavity; 54, third inner cavity; 55, fourth inner cavity. DETAILED DESCRIPTION
[0027] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.
[0029] In the present application, unless otherwise specified, the orientation such as "up, down" is generally directed to the direction shown in the drawings, or is directed to the vertical, perpendicular or gravity direction; similarly, for the convenience of understanding and description, "left, right" is generally directed to the left and right shown in the drawings; "inner, outer" refers to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.
[0030] Embodiment one, please refer to Figures 1-9 The present application provides the following technical solutions:
[0031] A gas pressure regulator double-pressure cut-off device, specifically comprising a gas pressure regulator 1 and an overpressure cut-off part 2 and a pressure loss cut-off part 3 fixedly installed at the gas inlet end and the gas outlet end of the gas pressure regulator 1 respectively; the overpressure cut-off part 2 comprises a first connecting pipe 4; a first annular pipe 5 is fixedly penetrated in the inner wall of the first connecting pipe 4; a plugging air bag 6 coaxially arranged with the first connecting pipe 4 is fixedly installed inside the first connecting pipe 4.
[0032] The pressure loss cut-off part 3 comprises a second connecting pipe 7; an inner pipe 8 coaxially arranged with the second connecting pipe 7 is fixedly installed inside the second connecting pipe 7; the two ends of the inner pipe 8 are closed; a conveying cavity 9 is formed between the second connecting pipe 7 and the inner pipe 8; a second annular pipe 10 is fixedly penetrated in the inner wall of the inner pipe 8; a second annular diaphragm 11 is fixedly installed in the inner wall of the second annular pipe 10; a plurality of second air holes 12 are uniformly arranged in the inner wall of the second annular pipe 10 arranged inside the conveying cavity 9; and a ring-shaped baffle 13 is fixedly connected between the inner wall of the second connecting pipe 7 and the outer wall of the second annular pipe 10.
[0033] The first annular diaphragm 30 divides the first annular pipe 5 into a first inner cavity 52 and a second inner cavity 53 from inside to outside; the second annular diaphragm 11 divides the second annular pipe 10 into a third inner cavity 54 and a fourth inner cavity 55 from inside to outside; and the second inner cavity 53 and the third inner cavity 54 are both filled with inert gas.
[0034] The working principle of the present embodiment is as follows:
[0035] When the first connecting pipe 4 is continuously under high pressure and the second connecting pipe 7 is under low pressure, the automatic double-pressure cut-off is realized through the linkage between the components, and the service life of the gas pressure regulator 1 and the downstream equipment is improved.
[0036] Embodiment Two, please refer to Figures 1-9 In this embodiment, the gas inlet end and the gas outlet end of the gas pressure regulator 1 are respectively connected with the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15; the end of the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15 is fixed with the first connecting flange 16, and the inner wall of the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15 is provided with the internal thread 17; one end of the first connecting pipe 4 and the second connecting pipe 7 is respectively connected with the plug-in pipe 18 which is inserted into the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15; the plug-in pipe 18 is fixed with the second connecting flange 19 on the side; and the outer wall of the plug-in pipe 18 is provided with the external thread 20 which is matched with the internal thread 17.
[0037] The high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15 are respectively provided with the first annular sealing groove 21 and the second annular sealing groove 22; the end of the plug-in pipe 18 is fixed with the rubber sealing ring 23 which is inserted into the first annular sealing groove 21; the outer wall of the plug-in pipe 18 is uniformly provided with the annular groove 24; the inner wall of the annular groove 24 is provided with the third annular diaphragm 25 which is matched with the annular groove 24; the plug-in pipe 18 is provided with the L-shaped pipe 26 which is communicated with the annular groove 24; the end of the L-shaped pipe 26 is fixed with the gas nozzle 27; and the gas nozzle 27 is screwed with the sealing cap.
[0038] The working principle of this embodiment is as follows:
[0039] The plug-in pipe 18 at the end of the first connecting pipe 4 and the second connecting pipe 7 is screwed into the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15 respectively; the rubber sealing ring 23 at the end of the plug-in pipe 18 is inserted into the corresponding first annular sealing groove 21; the gas nozzle 27 is filled with gas by the external gas filling equipment; the gas is filled into the corresponding L-shaped pipe 26; the third annular diaphragm 25 is filled with gas and is expanded; the expanded third annular diaphragm 25 is inserted into the corresponding second annular sealing groove 22; the first connecting pipe 4 and the second connecting pipe 7 are respectively connected with the high-pressure gas inlet pipe 14 and the low-pressure gas outlet pipe 15; and the sealing connection between the overpressure cutting end 2 and the pressure cut-off part 3 and the gas inlet end and the gas outlet end of the gas pressure regulator 1 is improved.
[0040] Embodiment Three, please refer to Figures 1-9The first connecting pipe 4 is internally provided with the first annular pipe 5, and the first annular pipe 5 is internally provided with the first annular cavity 29; the first annular pipe 5 is internally provided with the first annular diaphragm 30; the first connecting pipe 4 is internally provided with the piston cylinder 31; the piston cylinder 31 is internally provided with the piston plate 33; the piston plate 33 is internally provided with the T-shaped channel 36; the piston cylinder 31 is internally provided with the support ring 37; the first branch pipe 38 and the second branch pipe 39 are respectively fixedly connected to the two ends of the sealing air bag 6; the piston cylinder 31 is internally provided with the piston pipe 41; the piston pipe 41 is internally provided with the piston block 42; the piston pipe 41 is internally provided with the support pipe 43; the support pipe 43 and the exhaust pipe 44 are provided with one-way valves.
[0041] The piston cylinder 31 is internally provided with the support pipe 43; the support pipe 43 and the exhaust pipe 44 are provided with one-way valves.
[0042] The piston pipe 41 is internally provided with the support pipe 43; the support pipe 43 and the exhaust pipe 44 are provided with one-way valves.
[0043] The piston pipe 41 is internally provided with the support pipe 43; the support pipe 43 and the exhaust pipe 44 are provided with one-way valves.
[0044] The piston pipe 41 is internally provided with the support pipe 43; the support pipe 43 and the exhaust pipe 44 are provided with one-way valves.
[0045] The top of the piston pipe 41 is communicated with a fixed screw pipe 45 extending outward through the first connecting pipe 4; the screw pipe 45 is internally screwed with a screw rod 46 in rotational cooperation with the piston block 42; the top of the screw rod 46 is fixed with a handle 47; the outer wall of the first connecting pipe 4 is fixedly installed with an arc plate 48; the circumferential surface of the arc plate 48 is fixedly installed with a micro high-pressure air pump 49; the micro high-pressure air pump 49 is installed with a controller; the inner top of the first annular pipe 5 is installed with a pressure sensor; the input end of the controller is electrically connected with the pressure sensor, and the output end thereof is electrically connected with the micro high-pressure air pump 49; the air extraction end of the micro high-pressure air pump 49 is fixed with an air extraction pipe 50 extending into the inner part of the first connecting pipe 4, and the air exhaust end thereof is fixed with a conveying pipe 51 extending into the inner part of the first connecting pipe 4 and communicated with the second branch pipe 39.
[0046] The working principle of the third embodiment is as follows:
[0047] The first annular diaphragm 30 is inflated and supported in the inner bottom of the first inner cavity 52 by filling the second inner cavity 53 with standard high-pressure inert gas, and the fuel gas in the first inner cavity 52 is discharged into the inner part of the first connecting pipe 4 through the first air hole 28. At this time, the piston plate 33 is pressed against the inner top of the piston cylinder 31 under the elastic extrusion force of the reset spring 34, and the through hole 35 is blocked by the piston plate 33.
[0048] When the fuel gas continuously overflows in the first connecting pipe 4, the gas pressure in the first connecting pipe 4 is greater than the standard high pressure in the second inner cavity 53, and under the action of the pressure difference, the fuel gas in the first connecting pipe 4 enters the inner part of the first inner cavity 52 through the first air hole 28, until the inert gas in the second inner cavity 53 is pressed into the inner part of the piston cylinder 31 through the air conveying pipe 32, and the piston plate 33 is extruded and slides downward along the inner wall of the piston cylinder 31 until it is pressed against the supporting ring 37. At this time, the through hole 35 is in communication with the T-shaped channel 36, and the fuel gas in the first connecting pipe 4 enters the blocking air bag 6 in turn through the through hole 35, the T-shaped channel 36, the air conveying hose 40 and the first branch pipe 38, so that the gas pressure in the blocking air bag 6 is consistent with the gas pressure in the first connecting pipe 4, facilitating the subsequent rapid inflation of the blocking air bag 6.
[0049] The first annular diaphragm 30 is inflated and supported in the inner bottom of the first inner cavity 52 by filling the second inner cavity 53 with standard high-pressure inert gas, and the fuel gas in the first inner cavity 52 is discharged into the inner part of the first connecting pipe 4 through the first air hole 28. At this time, the piston plate 33 is pressed against the inner top of the piston cylinder 31 under the elastic extrusion force of the reset spring 34, and the through hole 35 is blocked by the piston plate 33.
[0050] When the pressure inside the subsequent first connecting pipe 4 is reduced to or below the standard high pressure, the piston plate 33 is lifted to reset under the elastic force of the reset spring 34 and the pressure difference between the second inner cavity 53 and the inside of the first connecting pipe 4, the through hole 35 is separated from the T-shaped channel 36, the first annular diaphragm 30 is reset against the inner bottom of the first inner cavity 52 to block the corresponding first gas permeable hole 28, at this time, the blocking air bag 6 still maintains the inflated state to block, only the manual rotation of the screw rod 46 drives the piston block 42 to slide upward, the elastic reset force of the blocking air bag 6 makes the gas inside the blocking air bag 6 enter the piston pipe 41, the reverse rotation of the screw rod 46 drives the piston block 42 to slide downward, the gas in the piston pipe 41 is discharged into the inside of the first connecting pipe 4 through the exhaust pipe 44, the blocking of the first connecting pipe 4 by the blocking air bag 6 is removed, and the safety during use is improved.
[0051] By injecting the inert gas of the standard low pressure into the third inner cavity 54, the second annular diaphragm 11 is inflated to block against the inner top of the fourth inner cavity 55 to block the second gas permeable hole 12, and the annular baffle 13 is combined to complete the blocking of the conveying cavity 9, only when the conveying cavity 9 discharges the gas higher than the standard low pressure, the gas will enter the fourth inner cavity 55 through the second gas permeable hole 12 under the action of the pressure difference, so that the second annular diaphragm 11 is separated from the inner top of the fourth inner cavity, the opening of the conveying cavity 9 is realized, and the influence of the discharged gas pressure loss on the normal use of the downstream equipment is avoided.
[0052] Obviously, the above-described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.
[0053] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.
[0054] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.
[0055] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
[0056] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A dual pressure cut-off device of a gas pressure regulator, comprising a gas pressure regulator (1) and an overpressure cut-off part (2) and a pressure loss cut-off part (3) fixedly installed at the gas inlet end and the gas outlet end of the gas pressure regulator (1) respectively; characterized in that: The overpressure cut-off end (2) comprises a first connecting pipe (4); a first annular pipe (5) is fixed through the inner wall of the first connecting pipe (4); a plugging air bag (6) is fixed and installed inside the first connecting pipe (4) and is coaxially arranged with the first connecting pipe (4); The pressure loss cut-off part (3) comprises a second connecting pipe (7); an inner pipe (8) is fixed inside the second connecting pipe (7) and is coaxially arranged with the second connecting pipe (7); the two ends of the inner pipe (8) are closed; a conveying cavity (9) is formed between the second connecting pipe (7) and the inner pipe (8); a second annular pipe (10) is fixed through the inner wall of the second annular pipe (10); a second annular diaphragm (11) is fixed to the inner wall of the second annular pipe (10); a plurality of second air permeable holes (12) are uniformly arranged on the inner wall of the second annular pipe (10) arranged in the conveying cavity (9); an annular baffle (13) is fixedly connected between the inner wall of the second connecting pipe (7) and the outer wall of the second annular pipe (10).
2. A dual pressure cut-out device for a gas pressure regulator as defined in claim 1, wherein: The gas pressure regulator (1) is respectively communicated with a high-pressure gas inlet pipe (14) and a low-pressure gas outlet pipe (15) at the gas inlet end and the gas outlet end; the high-pressure gas inlet pipe (14) and the low-pressure gas outlet pipe (15) are both fixed with a first connecting flange (16) at the end, and the inner wall of the first connecting flange (16) is provided with an internal thread (17); one end of the first connecting pipe (4) and the second connecting pipe (7) are both communicated with a plug-in pipe (18) which is inserted and matched with the corresponding high-pressure gas inlet pipe (14) and low-pressure gas outlet pipe (15); the plug-in pipe (18) is fixed with a second connecting flange (19) on the side surface; the outer wall of the plug-in pipe (18) is provided with an external thread (20) which is matched with the internal thread (17).
3. A dual pressure cut-out device for a gas pressure regulator as defined in claim 2, wherein: The high-pressure gas inlet pipe (14) and the low-pressure gas outlet pipe (15) are both provided with a first annular sealing groove (21) in the inside, and the inner wall of the first annular sealing groove (21) is provided with a plurality of second annular sealing grooves (22); the end of the plug-in pipe (18) is fixed with a rubber sealing ring (23) which is inserted and matched with the first annular sealing groove (21); the outer wall of the plug-in pipe (18) is uniformly provided with a plurality of annular grooves (24); the inner wall of the annular groove (24) is provided with a third annular diaphragm (25) which is matched with the annular groove (24); the plug-in pipe (18) is provided with an L-shaped pipe (26) which is communicated with each annular groove (24); the end of the L-shaped pipe (26) is communicated with a gas nozzle (27).
4. A dual pressure cut-out device for a gas pressure regulator as defined in claim 3, wherein: The first annular pipe (5) arranged in the first connecting pipe (4) is uniformly provided with a first air permeable hole (28) on the side surface; the first connecting pipe (4) is provided with an annular cavity (29) in the inside; the inner wall of the first annular pipe (5) is fixed with a first annular diaphragm (30); the inner wall of the first connecting pipe (4) is fixed through a piston cylinder (31); the top of the piston cylinder (31) and the first annular pipe (5) are communicated with a gas conveying pipe (32); the piston cylinder (31) is slidably provided with a piston plate (33); the bottom of the piston plate (33) and the inner bottom surface of the piston cylinder (31) are fixed with a return spring (34).
5. A dual pressure cut-out device for a gas pressure regulator as defined in claim 4, wherein: The piston cylinder (31) is symmetrically provided with a through hole (35) on the side surface; the piston plate (33) is internally provided with a T-shaped channel (36); the inner wall of the piston cylinder (31) is fixedly provided with a support ring (37) near the bottom; the occlusive air bag (6) is fixedly provided with a first branch pipe (38) and a second branch pipe (39) at both ends; the support column is fixedly communicated between the bottom of the piston cylinder (31) and the first branch pipe (38); the T-shaped channel (36) and the first branch pipe (38) are fixedly provided with a gas conveying hose (40).
6. A dual pressure cut-out device for a gas pressure regulator as defined in claim 5, wherein: The piston pipe (41) is fixedly penetrated in the inner wall of the first connecting pipe (4); the piston pipe (41) is internally slidably provided with a piston block (42); the support pipe (43) is fixedly communicated between the bottom of the piston pipe (41) and the second branch pipe (39); the exhaust pipe (44) is communicatedly provided on the side surface of the piston pipe (41) near the bottom; the support pipe (43) and the exhaust pipe (44) are provided with a one-way valve.
7. A dual pressure cut-out device for a gas pressure regulator as defined in claim 6, wherein: The screw pipe (45) is fixedly communicated on the top of the piston pipe (41) and extends outwardly through the first connecting pipe (4); the screw rod (46) is screw-connected with the piston block (42) and rotates with the piston block (42); the handle (47) is fixedly provided on the top of the screw rod (46); the arc-shaped plate (48) is fixedly installed on the outer wall of the first connecting pipe (4); the micro high-pressure air pump (49) is fixedly installed on the side surface of the arc-shaped plate (48); the controller is installed on the micro high-pressure air pump (49); the input end of the controller is electrically connected with the pressure sensor, and the output end of the controller is electrically connected with the micro high-pressure air pump (49); the air suction end of the micro high-pressure air pump (49) is fixedly provided with the air suction pipe (50) which extends into the first connecting pipe (4), and the air exhaust end of the micro high-pressure air pump (49) is fixedly provided with the conveying pipe (51) which extends into the first connecting pipe (4) and is fixedly communicated with the second branch pipe (39).
8. A dual pressure cut-out device for a gas pressure regulator as defined in claim 7, wherein: The first annular diaphragm (30) divides the first annular pipe (5) into a first inner cavity (52) and a second inner cavity (53) from inside to outside; the second annular diaphragm (11) divides the second annular pipe (10) into a third inner cavity (54) and a fourth inner cavity (55) from inside to outside; the second inner cavity (53) and the third inner cavity (54) are both filled with inert gas.