Air-tight pneumatic switch and method of use

Abstract

The application discloses airtight pneumatic switch, which comprises a switch integral part, a shell covering the switch integral part, and a first sealing washer arranged between the switch integral part and the shell. The switch integral part comprises a pneumatic assembly, a push rod assembly arranged on the pneumatic assembly, and two groups of combined contacts with the same specification. The switch has long service life, high temperature resistance, convenient assembly and debugging, small size, light weight, and good circuit connection performance. The application further discloses a use method of the airtight pneumatic switch.

Description

Airtight Pneumatic Switch and Usage Instructions Technical Field

[0001] This invention relates to a switch that uses an airtight structure to achieve an airtight function and activates the switch contacts, specifically an airtight pneumatic switch and its usage method. Background Technology

[0002] Mechanical limit switches are devices that control the connection or disconnection of one or more circuits through travel. Generally, limit switches operate under external mechanical pressure, with mechanical pressure / travel as input causing the actuating contacts to displace, thus switching circuits. Because limit switches rely on mechanical action, their sealing performance is limited to waterproof levels, rarely reaching gas-tight levels; high-pressure gas-powered changeover switches are even rarer. Waterproof limit switches primarily rely on rubber sealing rings for sealing, resulting in low sealing levels, and even lower levels of dynamic sealing. Since the rubber sealing ring actuates along with the switch button, the limit switch experiences a large rebound force and slow rebound, leading to delayed switching and affecting the control accuracy and signal feedback speed of the equipment. Providing mechanical actuation pressure for non-sealed mechanical limit switches in high-pressure gas environments is extremely difficult, resulting in poor usability. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an airtight pneumatic switch and its usage method. This switch has a long lifespan, high temperature resistance, is easy to assemble and debug, is small in size and light in weight, and has excellent circuit connection performance.

[0004] The technical solution to achieve the objective of this invention is:

[0005] An airtight pneumatic switch includes a switch assembly and a housing that covers part of the switch assembly. A first sealing gasket is provided between the switch assembly and the housing.

[0006] The switch assembly includes a pneumatic component, a push rod assembly mounted on the pneumatic component, and two sets of identical combination contacts.

[0007] The pneumatic assembly includes a base with a through hole at its center. A recess is located at the center of one end of the base. From the inside out, the bottom surface of the recess contains a movable corrugated body, an adjusting screw, a second sealing washer, and a screw plug. A fastening screw plug is also located at the outward-facing end of the adjusting screw plug. The fastening screw plug and the adjusting screw plug are adjusted and fixed together by fasteners and spring washers.

[0008] The push rod assembly includes a push rod and a first support plate at one end of the push rod, and a first moving contact assembly and a second moving contact assembly of the same specifications symmetrically arranged at one end of the push rod with the push rod axis as the baseline. The first moving contact assembly includes a third insulating sleeve and a fourth insulating sleeve nested and stacked on the first support plate by a first rivet. The first rivet has a first moving contact near the fourth insulating sleeve. The first moving contact assembly also includes a first insulating sleeve and a second insulating sleeve nested and stacked by the support sleeve. A first spring plate is provided between the connection between the third and fourth insulating sleeves and the connection between the first insulating sleeve and the support sleeve. A second spring plate is provided between the connection between the fourth insulating sleeve and the first rivet and the connection between the first and second insulating sleeves. A gasket is provided at the fitting part between the second insulating sleeve and the support sleeve. The push rod is placed in the middle of the adjusting screw plug, and the support sleeves of the first and second moving contact assemblies are connected to the base by fasteners to prevent the push rod assembly from tilting during operation, which could cause the push rod to become misaligned, resulting in jamming and malfunction of the push rod assembly.

[0009] The set of combined contacts includes a third spring plate and a second support plate stacked together. The center points of the third spring plate and the second support plate are on the same straight line. A second rivet is provided at the center of the second support plate and the third spring plate. A stationary contact is provided at the end of the second rivet near the end of the second support plate. A fifth insulating sleeve and a sixth insulating sleeve are stacked at the same end of the second support plate and the third spring plate, and a seventh insulating sleeve and an eighth insulating sleeve are stacked at the other end. The two ends of the second support plate and the third spring plate are respectively located at the connection between the fifth insulating sleeve and the sixth insulating sleeve and the connection between the seventh insulating sleeve and the eighth insulating sleeve. The two sets of combined contacts are horizontally parallel and spaced apart above the push rod assembly. The stationary contacts of the two sets of combined contacts are respectively directly opposite the first moving contact of the first moving contact assembly and the second moving contact of the second moving contact assembly in the push rod assembly. There is a gap between the two stationary contacts and the first moving contact and the second moving contact. The sixth insulating sleeve and the eighth insulating sleeve in the two sets of combined contacts are connected to the screw plug by fasteners.

[0010] The housing is provided with a socket partially embedded in the inner cavity of the housing. The end of the socket in the inner cavity of the housing is provided with a set of cables with cable clamps. The other end of the socket is a plug. The cables are respectively connected to the two ends of the second spring plate and the third spring plate of the first moving contact assembly and the second moving contact assembly.

[0011] The corrugated body includes a sphere and a first flat segment, a first corrugated segment, a second corrugated segment, a third corrugated segment, a fourth corrugated segment, a fifth corrugated segment, and a second flat segment radiating outward from the sphere. The first corrugated segment, the second corrugated segment, the third corrugated segment, the fourth corrugated segment, and the fifth corrugated segment have the same specifications, the corrugations of adjacent corrugated segments have opposite directions, and the connection points are tangent. The connection points between the sphere and the first flat segment, the first flat segment and the first corrugated segment, and the fifth corrugated segment and the second flat segment are provided with chamfers.

[0012] The lowest point of the sphere is lower than the bottom surface of the first flat section and the lowest point of the first corrugated section. The bottom surface of the first flat section is higher than the lowest point of the first corrugated section. The highest point of the first flat section is lower than the highest point of the first corrugated section. The lowest point of the second flat section is higher than the highest point of the first corrugated section.

[0013] The second sealing gasket is a metal sealing gasket. The second sealing gasket and the adjusting plug form a sealing ring with the bellows. The second sealing gasket is made of 20Cr13 material and provides a mechanical seal around the bellows to prevent gas leakage.

[0014] A gap is provided between the corrugated body and the adjusting screw plug.

[0015] The support sleeve is a metal support sleeve that serves a guiding function.

[0016] The first to the eighth insulating sleeves are all ceramic insulating sleeves to ensure the insulation performance of the first spring sheet, the second spring sheet and the third spring sheet.

[0017] The socket is a four-pin J599 ultra-miniature connector.

[0018] The first sealing gasket is a non-metallic sealing gasket.

[0019] The first to third spring plates are all made of beryllium bronze. The elastic deformation strength of the spring plates determines the movement displacement of the push rod assembly. The better the elasticity, the better the reliable deformation generated by repeated movements.

[0020] The first moving contact, the second moving contact, and the two stationary contacts are all made of silver tin oxide material with good conductivity.

[0021] The base material is 15-5PH stainless steel. During assembly and adjustment, the gap between the corrugated body and the adjusting screw plug should be ensured.

[0022] The corrugated body material is Mn steel strip. By calculating the operating pressure and operating stroke, the operating life of the switch is guaranteed. To ensure the elastic performance and fatigue strength of the corrugated body, a reasonable deformation size of the corrugated body should be determined and heat treatment should be performed.

[0023] The positional dimensions of the fastening plug and the plug are very important during assembly and debugging. It is necessary to ensure both the installation requirements of the screw and the positional relationship between the two.

[0024] The socket is fixedly connected to the housing by fasteners and bonded with thread-locking adhesive. The cable clamp is used to fix the four-core wire to the fasteners to prevent damage to the cable from excessive vibration during switch use. The wires are welded to the two stationary contacts. According to the circuit connection, the corresponding connection in the socket is determined and welded firmly.

[0025] A method for using an airtight pneumatic switch, comprising the aforementioned airtight pneumatic switch, the method comprising the following steps:

[0026] 1) Assemble all the components of the airtight pneumatic switch. At this time, the two sets of combined contacts and the push rod assembly form two normally open circuits, and the corrugated body is in a free state.

[0027] 2) Connect a high-pressure gas pipeline to the non-recessed end of the base, so that the high-pressure gas pipeline is connected to the through hole of the base;

[0028] 3) Input high-pressure gas, the high-pressure gas compresses the corrugated body, the compressed corrugated body pushes the push rod assembly, so that the first moving contact and the second moving contact are respectively connected to the two stationary contacts, and the two sets of circuits are connected. At this time, the corrugated body converts the pressure signal of the high-pressure gas into a mechanical displacement signal, and the connected circuit converts the mechanical signal into an electrical signal.

[0029] 4) The two connected circuits transmit electrical signals to the plug output of the socket through the cable. If the input high-pressure gas is reduced to the specified value, the first and second spring plates of the first and second moving contact components in the corrugated body and push rod assembly rebound, and the first and second moving contacts disconnect from the two stationary contacts respectively, and the two circuits return to the initial disconnected state.

[0030] The advantages of this gas-tight pneumatic switch are: 1. Integrated sealing structure design, with an ultimate pressure of up to 26.08MPa; 2. Precise bellows movement, fatigue resistance, and a mechanical life of up to fifteen years; 3. Reliable contact through a combination of contacts and spring plates to achieve line contact between stationary and moving contacts; 4. Use of ceramic insulators, which significantly improves the switch's high-temperature resistance; 5. Provides a J599 socket interface for convenient circuit connection; 6. Easy connection between the switch assembly and the housing, facilitating debugging; 7. Small size and light weight, requiring only threaded installation.

[0031] This type of switch has a long lifespan, is resistant to high temperatures, is easy to assemble and debug, is small in size and light in weight, and has excellent circuit connection performance. Attached Figure Description

[0032] Figure 1 is an assembly diagram of the embodiment;

[0033] Figure 2 is a structural diagram of the switch assembly in the embodiment;

[0034] Figure 3 is a structural diagram of the push rod assembly in the embodiment;

[0035] Figure 4 is a structural diagram of the combined contacts in the embodiment;

[0036] Figure 5 is a structural diagram of the pneumatic component in the embodiment;

[0037] Figure 6 is a structural diagram of the outer shell in the embodiment;

[0038] Figure 7 is a structural diagram of the corrugated body in the embodiment.

[0039] In the diagram, 1. Switch assembly; 2. Housing; 201. Socket; 202. Cable clamp; 203. Cable; 3. First sealing washer; 4. Pneumatic assembly; 401. Base; 4011. Through hole; 402. Corrugated body; 4021. Ball; 4022. First flat section; 4023. First corrugated section; 4024. Second corrugated section; 4025. Third corrugated section; 4026. Fourth corrugated section; 4027. Fifth corrugated section; 4028. Second flat section; 403. Adjusting plug; 404. Second sealing washer; 405. Plug; 406. Fastening plug; 407. Spring washer; 5. Push rod assembly; 501. Push rod; 502. First support piece 503. First rivet 504. Third insulating sleeve 505. Fourth insulating sleeve 506. First moving contact 5061. Second moving contact 507. Support sleeve 508. First insulating sleeve 509. Second insulating sleeve 5010. First spring piece 5011. Second spring piece 5012. Washer 6. Combined contact 601. Third spring piece 602. Second support piece 603. Second rivet 604. Stationary contact 605. Fifth insulating sleeve 606. Sixth insulating sleeve 607. Seventh insulating sleeve 608. Eighth insulating sleeve. Detailed Implementation Methods

[0040] The present invention will be further described below with reference to embodiments, but these are not intended to limit the scope of the invention. Embodiments

[0041] Referring to Figure 1, the airtight pneumatic switch includes a switch assembly 1 and a housing 2 that covers part of the switch assembly. A first sealing gasket 3 is provided between the switch assembly 1 and the housing 2.

[0042] As shown in Figure 2, the switch assembly 1 includes a pneumatic component 4, a push rod assembly 5 mounted on the pneumatic component 4, and two sets of identical combination contacts 6. In Figure 2, (a) is a front view of the push rod assembly, (b) is a front view of the combination contacts, and (c) is a top view of (b).

[0043] As shown in Figure 5, the pneumatic assembly 4 includes a base 401 with a through hole 4011 at its center. A recess is located at the center of one end of the base 401. From the inside out, the bottom surface of the recess is provided with a movable corrugated body 402, an adjusting plug 403, a second sealing washer 404, and a plug 405. A fastening plug 406 is also provided at the outward-facing end of the adjusting plug 403. The fastening plug 406 and the adjusting plug 403 are adjusted and fixed by fasteners and spring washers 407.

[0044] As shown in Figure 3, the push rod assembly 5 includes a push rod 501 and a first support plate 502 disposed at one end of the push rod 501, and a first moving contact assembly and a second moving contact assembly of the same specifications symmetrically arranged at one end of the push rod 501 with the push rod axis as the baseline. The first moving contact assembly includes a third insulating sleeve 504 and a fourth insulating sleeve 505 nested and stacked on the first support plate 502 by a first rivet 503. The first rivet 503 is provided with a first moving contact 506 near the fourth insulating sleeve 505. The first moving contact assembly also includes a first insulating sleeve 508 and a fourth insulating sleeve 505 nested and stacked by a support sleeve 507. A first spring plate 5010 is provided between the connection points of the second insulating sleeve 509, the third insulating sleeve 504, and the fourth insulating sleeve 505 and the connection points of the first insulating sleeve 508 and the support sleeve 507. A second spring plate 5011 is provided between the connection points of the fourth insulating sleeve 505 and the first rivet 503 and the connection points of the first insulating sleeve 508 and the second insulating sleeve 509. A gasket 5012 is provided at the fitting portion of the second insulating sleeve 509 and the support sleeve 507. The push rod 501 is located in the middle of the adjusting screw plug 403, and the support sleeves 507 of the first moving contact assembly and the second moving contact assembly are connected to the base 401 by fasteners.

[0045] As shown in Figure 4, the set of combined contacts 6 includes a third spring plate 601 and a second support plate 602 stacked together. The center points of the third spring plate 601 and the second support plate 602 are on the same straight line. A second rivet 603 is provided at the center of the second support plate 602 and the third spring plate 601. A stationary contact 604 is provided at the end of the second rivet 603 near the second support plate 602. A fifth insulating sleeve 605 and a sixth insulating sleeve 606 are stacked at the same end of the second support plate 602 and the third spring plate 601, and a seventh insulating sleeve 607 and an eighth insulating sleeve 608 are stacked at the other end. The two ends of 1 are located at the connection between the fifth insulating sleeve 605 and the sixth insulating sleeve 606, and at the connection between the seventh insulating sleeve 607 and the eighth insulating sleeve 608, respectively. The two sets of combined contacts 6 are horizontally parallel and spaced apart above the push rod assembly 5, and the stationary contacts 604 of the two sets of combined contacts 6 are respectively directly opposite the first moving contact 506 of the first moving contact assembly and the second moving contact 5061 of the second moving contact assembly in the push rod assembly 5. There is a gap between the two stationary contacts 604 and the first moving contact 506 and the second moving contact 5061. The sixth insulating sleeve 606 and the eighth insulating sleeve 608 in the two sets of combined contacts 6 are connected to the screw plug 405 by fasteners.

[0046] As shown in Figure 6, the outer shell 2 is provided with a socket 201 partially embedded in the inner cavity of the outer shell 2. The end of the socket 201 in the inner cavity of the outer shell 2 is provided with a set of cable 203 with cable clamp 202. The other end of the socket 201 is a plug. The cable 203 is connected to the second spring plate 5011 of the first moving contact assembly and the second moving contact assembly and the two ends of the third spring plate 601 of the two sets of combined contacts 6 respectively.

[0047] As shown in Figure 7, the corrugated body 402 includes a sphere 4021 and a first flat segment 4022, a first corrugated segment 4023, a second corrugated segment 4024, a third corrugated segment 4025, a fourth corrugated segment 4026, a fifth corrugated segment 4027, and a second flat segment 4028 radiating outwards from the sphere 4021. The first corrugated segments 4023, 4024, 4025, 4026, and 4027 have the same specifications, adjacent corrugated segments have opposite corrugation directions, and their connections are tangent. The sphere 4021 is connected to the first flat segment 4022 and the second flat segment 4028. The connection points between the first corrugated segment 4023, the fifth corrugated segment 4027, and the second flat segment 4028 are rounded. In this example, the corrugated body 402, which is integrally formed with the sphere 4021, the first flat segment 4022, the first corrugated segment 4023, the second corrugated segment 4024, the third corrugated segment 4025, the fourth corrugated segment 4026, the fifth corrugated segment 4027, and the second flat segment 4028, is basin-shaped. In this example, the diameter of the corrugated body 402 is 26 mm and the thickness is 0.4 mm. The diameter of the sphere 4021 is 2 mm. The radii of the first to fifth corrugated segments are all 1.3 mm, and the radius of the rounded corners is 0.3 mm.

[0048] The lowest point of the sphere 4021 is lower than the bottom surface of the first flat section 4022 and the lowest point of the first corrugated section 4023. The bottom surface of the first flat section 4022 is higher than the lowest point of the first corrugated section 4023. The highest point of the first flat section 4022 is lower than the highest point of the first corrugated section 4023. The lowest point of the second flat section 4028 is higher than the highest point of the first corrugated section 4023.

[0049] The second sealing gasket 404 is a metal sealing gasket, and the second sealing gasket 404 and the adjusting screw plug 403 form a sealing ring with the bellows 402.

[0050] A gap is provided between the corrugated body 402 and the adjusting screw 403.

[0051] The support sleeve 507 is a metal support sleeve.

[0052] The first insulating sleeve 508 to the eighth insulating sleeve 608 are all ceramic insulating sleeves.

[0053] The socket 201 is a four-pin J599 ultra-miniature connector.

[0054] The first sealing gasket 3 is a non-metallic sealing gasket.

[0055] The first spring plate 5010 to the third spring plate 601 are all made of beryllium bronze.

[0056] The first moving contact 506, the second moving contact 5061, and the two stationary contacts 604 are all made of silver tin oxide material with good conductivity.

[0057] The base 401 is made of 15-5PH stainless steel.

[0058] The corrugated body 402 is made of Mn steel strip.

[0059] A method for using an airtight pneumatic switch, comprising the aforementioned airtight pneumatic switch, the method comprising the following steps:

[0060] 1) After assembling all the components of the airtight pneumatic switch, the two sets of combined contacts 6 and push rod assembly 5 form two normally open circuits, and the corrugated body 402 is in a free state.

[0061] 2) Connect a high-pressure gas pipeline to the non-recessed end of the base 401, so that the high-pressure gas pipeline is connected to the through hole 4011 of the base 401.

[0062] 3) Input high-pressure gas, which compresses the corrugated body 402. The compressed corrugated body 402 pushes the push rod 501 of the push rod assembly 5. The push rod 501 causes the first moving contact 506 and the second moving contact 5061 to conduct with the two stationary contacts 604 respectively, and the two sets of circuits are connected. At this time, the corrugated body 402 converts the pressure signal of the high-pressure gas into a mechanical displacement signal, and the connected circuit converts the mechanical signal into an electrical signal.

[0063] 4) The two connected circuits transmit electrical signals to the plug output of the socket 201 through the cable 203. If the input high-pressure gas is reduced to the specified value, the first spring plate 5010 and the second spring plate 5011 of the first moving contact assembly and the second moving contact assembly in the corrugated body 402 and the push rod assembly 5 rebound, and the first moving contact 506 and the second moving contact 5061 are disconnected from the two stationary contacts 604 respectively, and the two circuits return to the initial disconnected state.

[0064] Through theoretical design calculations, analysis, and simulation, the long-term working pressure of the air-tight pneumatic switch in this example reaches 2.5MPa, and the ultimate air pressure reaches 26.08MPa, which meets the requirements of most industrial application environments.

Claims

1. An airtight pneumatic switch, characterized in that, The device includes a complete switch assembly and a housing that partially covers the switch assembly. A first sealing gasket is provided between the switch assembly and the housing. The switch assembly includes a pneumatic component, a push rod assembly mounted on the pneumatic component, and two sets of identical combination contacts. The pneumatic component includes a base with a through hole at its center. A recess is provided in the middle of one end of the base. From the inside out, the bottom surface of the recess is provided with a movable corrugated body, an adjusting screw, a second sealing gasket, and a screw plug. A fastening screw is also provided at the outward end of the adjusting screw. The fastening screw and the adjusting screw are adjusted and fixed by fasteners and spring washers. The push rod assembly includes a push rod and a first support plate provided at one end of the push rod, as well as a symmetrically positioned contact plate at one end of the push rod with the push rod axis as the baseline. The first moving contact assembly and the second moving contact assembly are identical. The first moving contact assembly includes a third insulating sleeve and a fourth insulating sleeve nested and stacked on a first support plate by a first rivet. The first rivet has a first moving contact near the fourth insulating sleeve. The first moving contact assembly also includes a first insulating sleeve and a second insulating sleeve nested and stacked by a support sleeve. A first spring plate is provided between the connection between the third and fourth insulating sleeves and the connection between the first insulating sleeve and the support sleeve. A second spring plate is provided between the connection between the fourth insulating sleeve and the first rivet and the connection between the first and second insulating sleeves. A gasket is provided between the sleeve portion of the second insulating sleeve and the support sleeve. A push rod is located in the middle of the adjusting screw plug. The first moving contact assembly and the second moving contact assembly are identical. The support sleeve and base of the two-moving contact assembly are connected by fasteners. One set of the combined contacts includes a stacked third spring plate and a second support plate, with the center points of the third spring plate and the second support plate collinear. A second rivet is provided at the center of the second support plate and the third spring plate. A stationary contact is provided near the end of the second rivet close to the second support plate. A fifth insulating sleeve and a sixth insulating sleeve are stacked at one end of the second support plate and the third spring plate, and a seventh insulating sleeve and an eighth insulating sleeve are stacked at the other end of the second support plate and the third spring plate. The two ends of the second support plate and the third spring plate are located at the connection points of the fifth and sixth insulating sleeves and the seventh and eighth insulating sleeves, respectively. Two sets of combined contacts are horizontally parallel and spaced apart above the push rod assembly. The stationary contacts of the two sets of combined contacts are respectively directly opposite the first moving contact of the first moving contact assembly and the second moving contact of the second moving contact assembly in the push rod assembly. There are gaps between the two stationary contacts and the first and second moving contacts, respectively. The sixth and eighth insulating sleeves of the two sets of combined contacts are respectively connected to the screw plugs by fasteners. The housing is provided with a socket partially embedded in the inner cavity of the housing. One end of the socket in the inner cavity of the housing is provided with a cable with a cable clamp, and the other end of the socket is a plug that goes out of the housing. The cable is connected to the second spring plates of the first and second moving contact assemblies and the two ends of the third spring plates of the two sets of combined contacts, respectively.

2. The airtight pneumatic switch according to claim 1, characterized in that, The corrugated body includes a sphere and a first flat segment, a first corrugated segment, a second corrugated segment, a third corrugated segment, a fourth corrugated segment, a fifth corrugated segment, and a second flat segment radiating outward from the sphere. The first corrugated segment, the second corrugated segment, the third corrugated segment, the fourth corrugated segment, and the fifth corrugated segment have the same specifications. The corrugations of adjacent corrugated segments have opposite directions and are tangent at the connection points. The connection points between the sphere and the first flat segment, the first flat segment and the first corrugated segment, and the fifth corrugated segment and the second flat segment are respectively provided with chamfers.

3. The airtight pneumatic switch according to claim 2, characterized in that, The lowest point of the sphere is lower than the bottom surface of the first flat section and the lowest point of the first corrugated section. The bottom surface of the first flat section is higher than the lowest point of the first corrugated section. The highest point of the first flat section is lower than the highest point of the first corrugated section. The lowest point of the second flat section is higher than the highest point of the first corrugated section.

4. The airtight pneumatic switch according to claim 1, characterized in that, The second sealing gasket is a metal sealing gasket, and the second sealing gasket and the adjusting plug form a sealing ring with the bellows.

5. The airtight pneumatic switch according to claim 1, characterized in that, A gap is provided between the corrugated body and the adjusting screw plug.

6. The airtight pneumatic switch according to claim 1, characterized in that, The support sleeve is a metal support sleeve.

7. The airtight pneumatic switch according to claim 1, characterized in that, The first insulating sleeve, the second insulating sleeve, the third insulating sleeve, the fourth insulating sleeve, the fifth insulating sleeve, the sixth insulating sleeve, the seventh insulating sleeve, and the eighth insulating sleeve are all ceramic insulating sleeves.

8. A method of using an airtight pneumatic switch, characterized in that, The method of the gas-tight pneumatic switch, including any one of claims 1-7, comprises the following steps: 1) Assembling the components of the gas-tight pneumatic switch, at which point the two sets of combined contacts and the push rod assembly constitute two sets of normally open circuits, and the corrugated body is in a free state; 2) Connecting a high-pressure gas pipeline to the end of the base without a recess, so that the high-pressure gas pipeline is connected to the through hole of the base; 3) Inputting high-pressure gas, the high-pressure gas compresses the corrugated body, and the compressed corrugated body pushes the push rod assembly, so that the first moving contact and the second moving contact are respectively connected to the two stationary contacts, and the two sets of circuits are connected. At this time, the corrugated body converts the pressure signal of the high-pressure gas into a mechanical displacement signal, and the connected circuit converts the mechanical displacement signal into an electrical signal; 4) The two connected circuits transmit the electrical signal to the plug output of the socket through a cable. If the input high-pressure gas decreases to a specified value, the first spring plate and the second spring plate of the first moving contact assembly and the second moving contact assembly in the corrugated body and the push rod assembly rebound, and the first moving contact and the second moving contact are respectively disconnected from the two stationary contacts, and the two sets of circuits return to the initial disconnected state.

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