A smart remote overpressure shut-off valve

Abstract

An intelligent remote overpressure shut-off valve has a connecting body sealed and fixed to the top of the valve body. An upper housing is sealed and fixed to the top of the connecting body. A pressure tapping interface communicating with the interior of the valve body is provided on the side wall of the connecting body. A push rod is slidably connected and raised through the middle of the connecting body. The upper part of the connecting body and the lower part of the upper housing together form a sealed pressure sensing chamber. A spring-loaded pressure sensing unit is slidably connected and raised inside the pressure sensing chamber. This spring-loaded pressure sensing unit is powered by the air pressure inside the chamber, and the push rod is movably connected and raised through the middle of the spring-loaded pressure sensing unit. An electromagnetic pressure sensing unit, triggered by the spring-loaded pressure sensing unit and transmitting signals remotely, is fixed on the upper housing. This shut-off valve is equipped with both a spring-loaded pressure sensing unit and an electromagnetic pressure sensing unit, facilitating quick determination of the shut-off valve's operating status by on-site maintenance personnel. It also enables remote signal transmission of the shut-off valve's operating status, exhibiting higher stability and safety than existing ordinary gas overpressure shut-off valves.

Description

Technical Field

[0001] This invention relates to the field of gas transmission and distribution technology, specifically to an intelligent remote overpressure shut-off valve. Background Technology

[0002] In gas transmission and distribution systems, a typical pressure regulating system is composed of filters, gas overpressure shut-off valves, pressure regulators, and inlet and outlet valves. Filtered gas enters the pressure regulator after being shut off due to overpressure, and then enters subsequent pipelines after being reduced in pressure. The overpressure shut-off valve monitors the regulator's outlet pressure; if the outlet pressure exceeds a set value, it can automatically cut off the gas supply to the regulator's inlet, thus preventing the regulator's outlet pressure from continuing to rise and causing accidents in subsequent pipelines.

[0003] Currently used overpressure shut-off valves vary in form, structure, and size, and generally lack remote valve position transmission devices. In a gas pressure regulating station with one open and one standby valve, if one line is shut off, the other line can continue to operate; if the second line is also shut off, the system shuts off gas. After the first line is shut off, it is difficult to detect that it has been shut off without manual inspection. While installing a pressure remote transmitter allows for indirect analysis of pressure data, it cannot quickly and accurately determine the status of the shut-off valve.

[0004] Therefore, how to use an overpressure shut-off valve for gas pipelines to remotely transmit the valve's on / off status and enable maintenance personnel to quickly determine the valve's on / off status is a problem that urgently needs to be solved by those skilled in the art.

[0005] The following prior art documents were found through a public patent search:

[0006] A gas overpressure shut-off valve (CN2358304Y) discloses a gas overpressure shut-off valve, characterized by a feedback signal channel on the middle body of the valve body; the actuator includes an actuator rod assembly, a sleeve, a cylindrical lower support, a movable roller, and a hook. When the sleeve is inserted, the actuator rod assembly is clamped and fixed by the movable roller; when the sleeve is pulled out, the actuator rod assembly loses its clamping and moves downward, causing the hook to actuate; the valve core is connected to the hook, one end of the hook is hinged to the valve body, and the other end cooperates with the hook; the valve core has a small valve port at its center and a small valve core fitted inside a small spring. This valve features reliable operation and convenient reset, enabling timely shut-off of gas overpressure, preventing overpressure gas supply, and ensuring safe gas use for users.

[0007] Analysis shows that the above-mentioned gas overpressure shut-off valve differs significantly from the present application in terms of structure, function, and the technical problem it solves, but this does not affect the novelty of the present application. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an intelligent remote overpressure shut-off valve. This shut-off valve is equipped with both a spring pressure sensing unit and an electromagnetic pressure sensing unit, which makes it easy for on-site maintenance personnel to quickly determine the working status of the shut-off valve. At the same time, it can realize remote signal transmission of the working status of the shut-off valve. Its stability and safety are higher than those of ordinary gas overpressure shut-off valves in the prior art.

[0009] An intelligent remote overpressure shut-off valve includes a valve body with an inlet flange and an outlet flange fixedly mounted on it. An upward-opening valve port is fixedly mounted inside the valve body. A push rod is slidably mounted on the upper part of the valve body, with a sealing plate connecting to the bottom of the push rod to block the valve port. A connecting body is sealed and fixedly connected to the top of the valve body, and an upper housing is sealed and fixedly connected to the top of the connecting body. A pressure tapping interface communicating with the interior of the valve body is provided on the side wall of the connecting body. The middle part of the connecting body penetrates and slidably connects to the push rod, and the upper part of the connecting body and the lower part of the upper housing together form a sealed pressure sensing chamber. A spring pressure sensing unit is slidably connected inside the pressure sensing chamber, and the spring pressure sensing unit is powered by the air pressure inside the pressure sensing chamber. The middle part of the spring pressure sensing unit penetrates and movably connects to the push rod. An electromagnetic pressure sensing unit triggered by the spring pressure sensing unit and used for remote signal transmission is fixedly mounted on the upper housing.

[0010] Furthermore, an upwardly extending spring cylinder is fixedly installed in the middle of the upper housing. A transparent dust cap for observing the rise of the spring pressure sensing unit is fixedly connected to the top of the spring cylinder. The inner wall of the spring cylinder provides a guide for the rise and fall of the spring pressure sensing unit. The spring pressure sensing unit includes a steel ball sleeve, a diaphragm, a diaphragm disc, a clamping nut, an adjusting spring, and an adjusting screw. A stepped limiting hole for mounting a push rod is made in the middle of the steel ball sleeve. The diaphragm, diaphragm disc, and clamping nut are sequentially installed in the middle of the steel ball sleeve. An adjusting spring is installed on the upper part of the steel ball sleeve. The top of the steel ball sleeve extends upward into the interior of the transparent dust cap. An adjusting screw is threadedly connected to the inner wall of the spring cylinder to press the adjusting spring downward. The outer periphery of the diaphragm is clamped and sealed by the bottom surface of the upper housing and the top surface of the connecting body. The top of the adjusting spring is elastically supported on the bottom surface of the adjusting screw, and the bottom of the adjusting spring is elastically supported on the top surface of the clamping nut.

[0011] Furthermore, a stepped ring is slidably connected to the stepped limiting hole in the middle of the push rod; multiple steel balls that adjust and hang the push rod are movably placed on the top surface of the connecting body, and the multiple steel balls are circumferentially distributed on the outer periphery of the push rod and adjusted and limited by the circumferential inner wall of the stepped limiting hole, and the upper parts of the multiple steel balls are adjusted and supported on the bottom surface of the stepped ring.

[0012] Furthermore, the electromagnetic pressure sensing unit includes a base, a guide rod, a sleeve, a permanent magnet, a reed switch, and an adjustment seat. The base is fixedly mounted on the top surface of the upper housing, and the sleeve is coaxially fixedly connected to the top of the base. The middle of the base is connected to a guide rod that penetrates downward through the upper housing. The top of the guide rod is fixedly mounted with a permanent magnet. The inner circumferential wall of the sleeve is threadedly connected to an adjustment seat, and the top of the sleeve is coaxially fixedly mounted with an explosion-proof cable connector. The middle of the adjustment seat is connected to a reed switch, the bottom of which is suspended directly above the permanent magnet at the top of the guide rod. The top of the reed switch is connected to a signal line that penetrates upward through the explosion-proof cable connector.

[0013] Furthermore, breathing holes are provided on the side wall of the upper shell.

[0014] Furthermore, a clearance hole is provided in the center of the top surface of the connector to allow the stepped ring of the push rod to move up and down, and a steel ball washer is fixed on the top surface of the connector, covering the outer periphery of the top opening of the clearance hole; multiple steel balls are movably placed on the steel ball washer.

[0015] The advantages and technical effects of this invention are:

[0016] The present invention discloses an intelligent remote overpressure shut-off valve, which is equipped with both a spring pressure sensing unit and an electromagnetic pressure sensing unit to synchronously detect the on / off state of the shut-off valve. The electromagnetic pressure sensing unit is triggered by the spring pressure sensing unit and transmits the trigger electrical signal to the detection receiving end. The specific function of the electromagnetic pressure sensing unit is as follows: the base provides lifting guidance for the guide rod, the bottom of the guide rod is supported upward by the diaphragm plate, and the permanent magnet at the top of the guide rod rises and contacts the reed switch, and then sends an electrical signal to the signal receiving end at a distance via a signal line.

[0017] The spring-loaded pressure sensing unit is triggered by the gas pressure in the pressure sensing chamber. Its specific functions are as follows: Increased gas pressure in the chamber pushes up the diaphragm and skin, and the tightening nut is threadedly connected to the outer wall of the steel ball sleeve. The diaphragm and skin then drive the steel ball sleeve upwards. The adjusting spring and adjusting screw provide a pre-tightening force to the skin, adjusting the initial rising gas pressure of the steel ball sleeve within the pressure sensing chamber. A stepped ring slidably connects to the push rod within the stepped limiting hole in the steel ball sleeve. The axial inner wall of the stepped limiting hole restricts the radial rolling displacement of the steel ball, causing it to be locked at the bottom of the stepped ring, enabling the push rod to be actively engaged. When the steel ball sleeve rises, the steel ball is released from its restraints and pushed outwards by the stepped ring to directly below the sleeve. This supports the sleeve, allowing its top to extend into the transparent dust cap, facilitating external observation of the shut-off valve's status by maintenance personnel. Simultaneously, the push rod descends to seal the valve port, achieving the overpressure shut-off function of the gas pipeline. Attached Figure Description

[0018] Figure 1 This is a front view of the present invention (partial cross-section, straight valve embodiment);

[0019] Figure 2 This is a front view of the present invention (partial cross-section, straight valve embodiment);

[0020] Figure 3 This is a front view (partial sectional view, angle valve embodiment) of the present invention;

[0021] The names of the parts in the diagram are shown in Table 1:

[0022] Table 1: List of Major Components

[0023] Serial Number name Serial Number name Serial Number name 1 Imported flanges 2 sleeve 3 steel ball gasket 4 screw 5 steel ball 6 putter 7 steel ball sleeve 8 base 9 Guide rod 10 permanent magnet 11 Return spring 12 casing 13 Explosion-proof cable connector 14 signal line 15 Reed switch 16 Adjustment seat 17 dust cap 18 Indicator column 19 Adjusting screw 20 Adjusting spring 21 Spring Cylinder 22 upper shell 23 tightening nut 24 Membrane disc 25 Breathing hole 26 membrane 27 Pressure tapping interface 28 Connector 29 valve seat 30 Spring sleeve 31 Cut-off spring 32 valve core 33 bezel 34 Hole elastic retaining ring 35 Sealing 36 Valve body 37 Valve core spring 38 valve port 39 Export flange 40 Pressure sensing chamber 41 Step ring 42 Stepped limit hole 43 Give way hole Detailed Implementation

[0024] To further understand the content, features, and effects of this invention, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings. It should be noted that these embodiments are descriptive, not limiting, and should not be construed as limiting the scope of protection of this invention.

[0025] An intelligent remote overpressure shut-off valve includes a valve body 36, on which an inlet flange 1 and an outlet flange 39 are fixedly mounted. An upward-facing valve port 38 is fixedly mounted inside the valve body. A push rod 6 is slidably mounted on the upper part of the valve body, with a sealing plate 35 connecting to the bottom of the push rod to block the valve port. A connecting body 28 is sealed and fixedly connected to the top of the valve body, and an upper housing 22 is sealed and fixedly connected to the top of the connecting body. A pressure tapping interface 27 communicating with the interior of the valve body is provided on the side wall of the connecting body. The middle part of the connecting body penetrates and slidably connects to the push rod, and the upper part of the connecting body and the lower part of the upper housing together form a sealed pressure sensing chamber 40. A spring pressure sensing unit is slidably connected inside the pressure sensing chamber, and the spring pressure sensing unit is powered by the air pressure inside the pressure sensing chamber. The middle part of the spring pressure sensing unit penetrates and movably connects to the push rod. An electromagnetic pressure sensing unit triggered by the spring pressure sensing unit and transmitting signals remotely is fixedly mounted on the upper housing.

[0026] Furthermore, a spring cylinder 21 extending upward is fixedly installed in the middle of the upper housing, and a transparent dust cap 17 for observing the rise of the spring pressure sensing unit is fixedly connected to the top of the spring cylinder. The inner wall of the spring cylinder provides a lifting guide for the spring pressure sensing unit. The spring pressure sensing unit includes a steel ball sleeve 7, a diaphragm 26, a diaphragm disc 24, a clamping nut 23, a pressure adjusting spring 20, and a pressure adjusting screw. A stepped limiting hole 42 for mounting a push rod is made in the middle of the steel ball sleeve. The diaphragm, diaphragm disc, and clamping nut are sequentially installed in the middle of the steel ball sleeve. A pressure adjusting spring is installed on the upper part of the steel ball sleeve. The top of the steel ball sleeve extends upward into the transparent dust cap, and a pressure adjusting screw is threaded onto the steel ball sleeve to clamp the pressure adjusting spring. The outer periphery of the diaphragm is clamped and sealed by the bottom surface of the upper housing and the top surface of the connecting body. The top of the pressure adjusting spring is elastically supported on the bottom surface of the pressure adjusting screw, and the bottom of the pressure adjusting spring is elastically supported on the top surface of the clamping nut.

[0027] Furthermore, a stepped ring 41 is slidably connected to the stepped limiting hole in the middle of the push rod; multiple steel balls 5 for adjusting and hanging the push rod are movably placed on the top surface of the connecting body, wherein the multiple steel balls are circumferentially distributed on the outer periphery of the push rod and are adjusted and limited by the circumferential inner wall of the stepped limiting hole, and the upper part of the multiple steel balls is adjusted and supported on the bottom surface of the stepped ring.

[0028] Furthermore, the electromagnetic pressure sensing unit includes a base 8, a guide rod 9, a sleeve 12, a permanent magnet 10, a reed switch 15, and an adjustment seat 16. The base is fixedly mounted on the top surface of the upper housing, and the sleeve is coaxially fixedly connected to the top of the base. The middle of the base is connected to a guide rod that penetrates downward through the upper housing. The top of the guide rod is fixedly mounted with a permanent magnet. An adjustment seat is threadedly connected to the inner circumferential wall of the sleeve, and an explosion-proof cable connector 13 is coaxially fixedly mounted on the top of the sleeve. A reed switch is fixedly connected to the middle of the adjustment seat. The bottom of the reed switch is suspended directly above the permanent magnet at the top of the guide rod, and a signal line 14 that penetrates upward through the explosion-proof cable connector is connected to the top of the reed switch. A return spring 11 is coaxially arranged inside the sleeve. The top of the return spring is supported on the bottom of the reed switch, and the bottom of the return spring is supported on the top surface of the permanent magnet.

[0029] Furthermore, a breathing hole 25 is provided on the side wall of the upper shell.

[0030] Furthermore, a clearance hole 43 is provided in the middle of the top surface of the connector to provide lifting clearance for the stepped ring of the push rod, and a steel ball washer 3 is fixedly installed on the top surface of the connector, covering the outer periphery of the top opening of the clearance hole; multiple steel balls are movably placed on the steel ball washer.

[0031] In addition, preferably, a sleeve 2 is fixedly connected inside the valve body. The top of the sleeve is fixedly connected to the bottom surface of the connector, and the sleeve is fitted around the outside of the push rod to provide guidance and protection for the push rod and the valve disc.

[0032] To more clearly describe the specific embodiments of the present invention, an example is provided below:

[0033] The overpressure shut-off valve consists of a drive unit and a valve body, fastened together with screws. The drive unit is a direct-acting type, and the actuator is a lifting type. The main body of the shut-off drive unit comprises an upper housing and a connecting body, with a diaphragm in the middle. The lower side of the diaphragm is the pressure monitoring side, and the upper side is a diaphragm disc in contact with the diaphragm, which is in contact with a pressure regulating spring. The diaphragm disc and a steel ball sleeve are connected as one unit via threads; the push rod passes through the steel ball sleeve, and a steel ball holds the push rod between the push rod and the steel ball sleeve. When the steel ball sleeve shifts, the space around the steel ball increases, causing the steel ball to move away from the push rod, thus releasing the push rod. A manual pull rod can be connected to the top of the push rod, and the bottom is connected to the valve core 32 via threads. The valve core and the sealing disc are also connected as one unit via threads. The sealing disc is pressed against the valve port by the shut-off spring 31, thereby cutting off the airflow.

[0034] The shut-off valve uses a flange connection, but can also be designed with a threaded connection according to user requirements; the shape is divided into straight-through valve type and angle valve type to suit different installation occasions.

[0035] The core components of the valve position remote transmission device (i.e., the electromagnetic pressure sensing unit) are a reed switch and a permanent magnet. The permanent magnet is mounted on a guide rod. After the shut-off valve is closed, the valve diaphragm moves upward, simultaneously pushing the guide rod. When the permanent magnet approaches the reed switch, the reed switch is triggered, closing the circuit and providing a passive switching signal to the corresponding remote transmission device. After the shut-off valve is reopened, the diaphragm returns to its original position. Under the action of the return spring, the permanent magnet moves away from the reed switch, resetting the switch and disconnecting the circuit. This achieves remote transmission of the shut-off valve position.

[0036] Working principle

[0037] The overpressure shut-off valve is installed in the gas pipeline via a flange, located upstream of the gas pressure regulator. Its pressure tap is located on the regulator's outlet pipeline. The shut-off valve monitors the regulator's outlet pressure. Under normal conditions, when the outlet pressure is lower than the shut-off valve's shut-off pressure, the valve opens, allowing gas to flow through the valve port into the regulator.

[0038] When the outlet pressure of the pressure regulator rises due to reasons such as pressure regulator failure, the shut-off valve will activate after the pressure exceeds the set pressure of the shut-off valve. The sealing disc will press the valve port tightly under the action of the shut-off spring, thereby cutting off the gas supply and preventing the outlet pressure from continuing to rise from the source, thus protecting the downstream pipeline equipment.

[0039] At the same time as the shut-off valve is shut off, the valve position remote transmission device is triggered, providing a passive switching signal to the remote data transmitter, thereby uploading the shut-off information to the management center as soon as possible and improving the speed of emergency repair response.

[0040] After troubleshooting, the shut-off valve is reset using a dedicated shut-off valve lever. At the same time, the valve position remote transmission device is automatically reset, gas supply is restored, and the reset signal is simultaneously uploaded to the management center.

[0041] Advantages and positive effects

[0042] 1. It adopts a direct-acting structure, which is simple and reliable, and acts quickly and sensitively. It can quickly cut off the gas supply when the pressure is too high, protecting the safety of downstream pipeline equipment of the pressure regulator.

[0043] 2. Install a valve position remote transmission device, which can immediately send a signal to the remote data transmitter after the switching valve is shut off, and upload it to the management center in a timely manner to improve the efficiency of fault handling.

[0044] Structural Description

[0045] The overpressure shut-off valve mainly consists of a valve body, a shut-off drive, and a valve position remote transmission device.

[0046] The valve body consists of an inlet flange, an outlet flange, a valve seat 29, and a valve port. It can be machined into a straight-through valve or an angle valve according to usage requirements. The valve body is connected to the gas pipeline via a flange, or the inlet and outlet can be threaded for connection as required.

[0047] A connector is installed on the valve seat, and the two are connected by screw 4, which compresses the sealing ring to achieve a seal.

[0048] The upper housing is mounted on the connector and is fastened with screws. A pressure tapping port is located on one side of the connector, which receives the regulator's outlet pressure via a signal tube.

[0049] A diaphragm is sandwiched between the connecting body and the upper shell. The diaphragm is mounted on the steel ball sleeve, and a diaphragm disc is installed on the diaphragm. The diaphragm is compressed and sealed by tightening the nut.

[0050] A push rod passes through a steel ball sleeve, and a steel ball is placed between the push rod and the steel ball sleeve. A steel ball washer is installed on the connecting body to provide load-bearing and wear-resistant properties during the movement of the steel ball.

[0051] A sealing ring is installed between the steel ball sleeve and the push rod to seal the push rod.

[0052] A sealing ring is installed between the connector and the push rod, and a bushing is used to fix the sealing ring, thereby sealing the push rod.

[0053] A spring cylinder is installed on the upper housing to press the sealing ring and achieve a seal. An adjusting spring and adjusting screw 19 are placed inside the spring cylinder; the shut-off pressure of the shut-off valve is set by adjusting the tightness of the adjusting spring.

[0054] An indicator post 18 is placed inside the spring cylinder. After the shut-off valve is shut off, the position of the indicator post moves upward so that the operator can judge the shut-off status.

[0055] A dust cap is installed on the spring cylinder, and a seal is achieved by pressing the sealing ring, which serves to prevent water and dust.

[0056] A valve core is installed below the push rod. An elastic retaining ring 34 and a retaining ring 33 are used to integrate the valve core and the sealing disc. A rubber gasket is installed below the valve core, and the gasket is pressed together by the valve core spring 37 to achieve a seal. A spring sleeve 30 and a shut-off spring are installed above the valve core to provide the power for the shut-off valve to cut off.

[0057] The sealing plate is encapsulated with an adhesive gasket, which presses against the valve port to achieve a seal and cut off the gas supply.

[0058] The rubber pad and sealing plate have small holes that allow for pressure relief during cut-off recovery, ensuring equal pressure on the top and bottom of the sealing plate and facilitating its lifting.

[0059] A valve position remote transmission device is installed on the upper housing. The base is mounted on the upper housing, and a sealing ring is compacted to achieve waterproofing and leak prevention.

[0060] A sleeve is installed on the base, with a sealing ring between them. A guide rod is installed inside the base, with a permanent magnet embedded at the top. An adjusting seat is installed inside the sleeve, and a reed switch is installed inside the adjusting seat. A return spring is installed between the reed switch and the guide rod.

[0061] The magnetic reed switch signal lead-out device uses explosion-proof cable connectors to achieve circuit sealing.

[0062] Work process:

[0063] Normally, the pressure signal from the pressure tapping port acts on the diaphragm, and the pressure on the diaphragm disc from the diaphragm is balanced by the elastic force from the pressure regulating spring. The elastic force of the cut-off spring on the push rod is balanced by the supporting force of the steel ball. When the pressure signal exceeds the set value, the pressure on the diaphragm disc from the diaphragm increases, causing displacement. The steel ball sleeve moves accordingly, increasing the space around the steel ball. Under the pressure of the push rod, the ball displaces outward, and the push rod is then released. Under the action of the cut-off spring, the valve core drives the sealing disc to move and tightly press against the valve port to cut off the airflow. Only by manually lifting the push rod can the shut-off valve return to its normal state.

[0064] When the diaphragm moves upward, it pushes the guide rod, and the permanent magnet on the guide rod approaches the reed switch and triggers it. The reed switch then provides a closing signal, which is transmitted through the signal line to the remote data transmitter and then uploaded to the control center.

[0065] All aspects not covered in this invention utilize existing mature products and technologies.

[0066] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An intelligent remote overpressure shut-off valve, comprising a valve body, an inlet flange and an outlet flange fixedly mounted on the valve body, a valve port with an upward opening fixedly mounted inside the valve body, a push rod slidably mounted on the upper part of the valve body, and a sealing plate for sealing the valve port connected to the bottom of the push rod, characterized in that: The valve body is sealed and fixedly connected to a connector at its top, and an upper housing is sealed and fixedly connected to the top of the connector. A pressure tapping interface communicating with the inside of the valve body is provided on the side wall of the connector. A push rod is slidably connected to the connector through its middle section, and the upper part of the connector and the lower part of the upper housing together form a sealed pressure sensing chamber. A spring pressure sensing unit is slidably connected to the inside of the pressure sensing chamber. The spring pressure sensing unit is powered by the air pressure inside the pressure sensing chamber, and the push rod is movably connected to the spring pressure sensing unit through its middle section. An electromagnetic pressure sensing unit triggered by the spring pressure sensing unit and used for signal transmission is fixedly mounted on the upper housing. The electromagnetic pressure sensing unit includes a base, a guide rod, a sleeve, a permanent magnet, a reed switch, and an adjustment seat. The base is fixedly mounted on the top surface of the upper housing. The sleeve is coaxially fixed to the top of the base, and the guide rod, which penetrates downward through the upper housing, is slidably connected to the middle of the base. A permanent magnet is fixedly mounted on the top of the guide rod. An adjustment seat is threaded onto the circumferential inner wall of the sleeve, and an explosion-proof cable connector is coaxially fixed to the top of the sleeve. A reed switch is fixedly mounted through the middle of the adjustment seat. The bottom of the reed switch is suspended directly above the permanent magnet at the top of the guide rod, and a signal line that penetrates upward through the explosion-proof cable connector is connected to the top of the reed switch. A return spring is coaxially arranged inside the sleeve. The top of the return spring is supported by the bottom of the reed switch, and the bottom of the return spring is supported by the top surface of the permanent magnet. Breathing holes are provided on the side wall of the upper shell.

2. The intelligent remote overpressure shut-off valve according to claim 1, characterized in that: A spring cylinder extending upwards is fixedly mounted in the middle of the upper housing. A transparent dust cap for observing the rise of the spring pressure sensing unit is fixedly connected to the top of the spring cylinder. The inner wall of the spring cylinder provides a guide for the rise and fall of the spring pressure sensing unit. The spring pressure sensing unit includes a steel ball sleeve, a diaphragm, a diaphragm disc, a clamping nut, an adjusting spring, and an adjusting screw. A stepped limiting hole for mounting a push rod is formed in the middle of the steel ball sleeve. The diaphragm, diaphragm disc, and clamping nut are sequentially fitted in the middle of the steel ball sleeve. An adjusting spring is fitted on the upper part of the steel ball sleeve. The top of the steel ball sleeve extends upwards into the transparent dust cap. An adjusting screw is threadedly connected to the inner wall of the spring cylinder to press the adjusting spring downwards. The outer periphery of the diaphragm is clamped and sealed by the bottom surface of the upper housing and the top surface of the connecting body. The top of the adjusting spring is elastically supported on the bottom surface of the adjusting screw, and the bottom of the adjusting spring is elastically supported on the top surface of the clamping nut.

3. The intelligent remote overpressure shut-off valve according to claim 2, characterized in that: The push rod has a stepped ring that slides into the stepped limiting hole in the middle; multiple steel balls that adjust and hang the push rod are movably placed on the top surface of the connecting body, wherein the multiple steel balls are circumferentially distributed on the outer periphery of the push rod and are adjusted and limited by the circumferential inner wall of the stepped limiting hole, and the upper parts of the multiple steel balls are adjusted and supported on the bottom surface of the stepped ring.

4. The intelligent remote overpressure shut-off valve according to claim 1, characterized in that: The top surface of the connector has a clearance hole in the middle to provide lifting clearance for the stepped ring of the push rod, and a steel ball washer is fixed on the top surface of the connector, covering the outer periphery of the top opening of the clearance hole; multiple steel balls are movably placed on the steel ball washer.

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