Intelligent normally-closed emergency cut-off electromagnetic valve

Abstract

The intelligent normally-closed emergency cut-off electromagnetic valve comprises a valve body module, an opening module, an action module and a circuit module, the opening module, the action module and the circuit module are installed on the valve body module, and the opening module comprises a top cover, a first driving unit and a second driving unit; the action module comprises a driving rod and a valve plate; the circuit module comprises a circuit board, an air pressure sensor and a valve position sensor. According to the intelligent normally-closed emergency cut-off electromagnetic valve disclosed by the invention, the rotating shaft gear and the middle shaft rack are driven to act by rotating the rotating handle, so that the driving rod is driven, the valve plate is quickly lifted, and quick opening is realized; the first communication circuit, the second communication circuit, the voltage acquisition circuit and the booster circuit are linked, so that near-field and far-field transmission of data is realized, voltage is detected in real time, power is supplied to the coil through the standby battery during power failure, and emergency cut-off during power failure is realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of solenoid valves, and in particular relates to an intelligent normally closed emergency cut-off solenoid valve. Background Art

[0002] The gas emergency shut-off solenoid valve is a safety device mainly used in gas transmission and distribution systems. When a gas leak or other emergency situation is detected, the coil can be quickly energized by the mains electricity, thereby linking the drive rod and valve plate to cut off the gas supply and prevent the accident from escalating.

[0003] To open a gas emergency shutoff solenoid valve, the valve disc must be lifted, allowing the valve's input and output to connect, allowing gas to flow. During opening, the gas exerts downward pressure on the valve disc. This pressure is high when the valve disc is large, making manual opening difficult. Furthermore, many existing gas shutoff valves lack remote communication capabilities, preventing remote data viewing. Furthermore, they lose their emergency shutoff function in the event of a power outage, posing a potential safety hazard.

[0004] Therefore, further improvements are made to the above problems. Summary of the Invention

[0005] The main purpose of the present invention is to provide an intelligent normally closed emergency shut-off solenoid valve, which is linked by an opening module, an action module and a circuit module, and drives the rotating shaft gear and the central axis rack to move by rotating the handle, thereby driving the drive rod, and then the valve plate is quickly lifted up to achieve rapid opening; and is linked by a first communication circuit, a second communication circuit, a voltage acquisition circuit and a boost circuit to achieve near-field and far-field transmission of data, and real-time voltage detection, and when the power is off, the coil is powered by a backup battery, thereby achieving emergency shut-off when the power is off. It has the advantages of high practicality, high safety and wide range of applications.

[0006] To achieve the above objectives, the present invention provides an intelligent normally closed emergency shut-off solenoid valve, comprising a valve body module and an opening module, an action module, and a circuit module installed on the valve body module, wherein:

[0007] The valve body module includes a lower valve body and an upper valve body, wherein the lower valve body and the upper valve body are fixedly connected, the lower valve body is provided with a gas input end, a gas output end, and gas through holes located at the gas input end and the gas output end, and the lower valve body is further provided with a balancing cavity, and the balancing cavity is connected to the gas input end (through a small hole);

[0008] The opening module includes a top cover, a first drive unit and a second drive unit. The first drive unit and the second drive unit are both mounted on the top cover. The top cover is fixedly mounted on the top of the upper valve body. The top cover is provided with a gear channel and a rack channel. The first drive unit includes a turning handle, a connecting pipe, a return spring and a rotating shaft gear. The second drive unit includes a central axis rack, a position indicating cap and a sealing cover.

[0009] The action module includes a driving rod and a valve plate, the top of the driving rod is fixedly connected to the bottom of the central axis rack and the bottom of the driving rod is installed with the valve plate, and the valve plate is located in the gas through hole;

[0010] The circuit module includes a circuit board, an air pressure sensor and a valve position sensor. The installation position of the air pressure sensor is connected to the gas input end, monitors the gas pressure data in real time and transmits the air pressure data to the circuit board. The valve position sensor (magnetic element) is located on one side of the driving rod and monitors in real time whether the driving rod is close, thereby transmitting the obtained valve position data to the circuit board (when the solenoid valve is opened, the driving rod moves upward, thereby approaching the valve position sensor, thereby triggering the valve position sensor to generate a signal; when the solenoid valve is closed, the driving rod moves downward, thereby moving away from the valve position sensor, thereby releasing the trigger and generating another signal. The two signals can be used as valve position status). The circuit board includes a first communication circuit and a second communication circuit. The first communication circuit and the second communication circuit are used to wirelessly transmit the obtained data.

[0011] As a further preferred technical solution of the above technical solution, for the top cover, the gear channel and the rack channel are connected, and a safety flip cover is provided at one end of the gear channel;

[0012] For the first driving unit, the first end of the rotating handle is fixedly mounted on the first end of the connecting tube, and the first end of the rotating handle is provided with a locking block, and the locking block is used to be installed in the lock hole of the safety flip cover; the second end of the connecting tube and the rotating shaft gear are both built into the gear channel, and the second end of the connecting tube is provided with a connecting groove portion, the return spring is sleeved on the second end of the connecting tube, and the end of the rotating shaft gear close to the connecting tube is provided with a connecting protrusion, and the connecting groove portion is used to be inserted into the protrusion;

[0013] For the second driving unit, the central axis rack is installed on the rack channel and the central axis rack is meshed with the rotating shaft gear, the position indicating cap is fixedly installed on the top of the central axis rack, the cover is covered on the position indicating cap and the cover is fixedly installed on the top of the rack channel.

[0014] As a further preferred technical solution of the above technical solution, the action module further includes a moving iron core, a fixed iron core, a coil (powered by a circuit module) and an auxiliary opening unit, the moving iron core and the fixed iron core are both sleeved on the driving rod and the moving iron core is located above the fixed iron core, and the coil surrounds the moving iron core and the fixed iron core (when emergency shutoff is required, the coil is energized by the circuit module, thereby electromagnetic induction, attracting and moving the moving iron core to a position close to the fixed iron core, thereby releasing the restrictions of the steel ball, the groove part and other components on the driving rod, and then the driving rod moves downward, so that the valve plate covers the gas through hole, achieving emergency shutoff);

[0015] The auxiliary opening unit includes a balancing membrane assembly and a push rod. The balancing membrane assembly covers the balancing cavity and is surrounded and fixed to the bottom of the push rod. The top of the push rod is close to the gas through hole.

[0016] As a further preferred technical solution of the above technical solution, it further includes a manual closing module installed on the upper valve body, the manual closing module includes a push rod, a cover and a spring, the cover covers the first end of the push rod and the spring is sleeved on the push rod, wherein:

[0017] (When both the mains power supply and the battery power supply of the circuit module fail, manual closing can be performed in an emergency) When manual closing is required, open the cover and push the first end of the push rod so that the second end of the push rod is close to the moving iron core and presses the moving iron core downward through the inclined surface. After the driving rod releases the restriction, it drives the valve plate to move downward and cover the gas through hole (manual emergency shut-off is achieved. After releasing the push rod, the push rod is reset due to spring compression).

[0018] As a further preferred technical solution of the above technical solution, the first communication circuit includes a communication chip U2 and an antenna interface RF2, and pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 through an inductor SL1, a resistor BR11, and a capacitor C2 in sequence; pin 16 of the communication chip U2 is electrically connected to the second end of the connector P7 through a resistor R24, and pin 17 of the communication chip U2 is electrically connected to the first end of the connector P7 through a resistor R23; pin 22 of the communication chip U2 is electrically connected to the connector P6 through a resistor R30, and the end of the resistor R30 close to the connector P6 is also electrically connected to pin 21 of the communication chip U2;

[0019] The second communication circuit includes a communication chip U3, an antenna interface RF1 and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 through resistor NR11 and capacitor CF1 in sequence. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 through resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 through resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2.

[0020] As a further preferred technical solution of the above technical solution, pin 18 of the communication chip U2 is grounded through a diode D1 and the cathode of the diode D1 is electrically connected to the connector P4;

[0021] The second communication circuit also includes a SIM card holder, pin 12 of the communication chip U2 is electrically connected to the C3 end of the SIM card holder through a resistor R13, pin 13 of the communication chip U2 is electrically connected to the C5 end of the SIM card holder through a resistor R15, pin 14 of the communication chip U2 is electrically connected to the C6 end of the SIM card holder through a resistor R14, and pin 15 of the communication chip U2 is electrically connected to the C1 end of the SIM card holder.

[0022] As a further preferred technical solution of the above technical solution, it further includes a voltage acquisition circuit, wherein the voltage acquisition circuit includes a resistor R19 and a resistor R21, and a common terminal of the resistor R19 and the resistor R21 is electrically connected to the Schottky diode D6;

[0023] The device further includes a boost circuit, the boost circuit including a boost chip U5 and a transistor SQ5, wherein pin 1 of the transistor SQ5 is electrically connected to the battery power supply terminal via a diode FD3 and an inductor L3 in sequence, pin 1 of the boost chip U5 is electrically connected to the common terminal of the diode FD3 and the inductor L3, and pin 3 of the boost chip U5 is electrically connected to an end of the resistor R19 away from the resistor R18, pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 via a resistor R40, and pin 5 of the boost chip U5 is electrically connected to the battery power supply terminal on one path and electrically connected to pin 1 of the transistor SQ5 on the other path via capacitors C42 and C41;

[0024] Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 through resistor R22 and is electrically connected to the source of the field-effect transistor Q5 through resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 through resistor FR16, and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 through resistor FR8. The output end of the transistor SQ5 is connected to the coil load interface P5. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a cross-sectional view of the present invention (closed state).

[0027] Figure 3 It is a cross-sectional view of the present invention (open state).

[0028] Figure 4 It is a cross-sectional view from another angle of the present invention (open state).

[0029] Figure 5 It is a structural schematic diagram of the opening module of the present invention.

[0030] Figure 6 It is a cross-sectional view of the opening module of the present invention.

[0031] Figure 7 It is a structural schematic diagram of the opening module of the present invention.

[0032] Figure 8 This is the first communication circuit diagram of the present invention.

[0033] Figure 9 It is the second communication circuit diagram of the present invention.

[0034] Figure 10 It is a voltage acquisition circuit diagram of the present invention.

[0035] Figure 11 It is a boost circuit diagram of the present invention.

[0036] Reference numerals include: 100, valve body module; 110, lower valve body; 111, gas input end; 112, gas output end; 113, gas through hole; 114, balance chamber; 120, upper valve body; 200, opening module; 210, top cover; 211, gear channel; 212, rack channel; 213, safety flip cover; 220, first drive unit; 221, handle; 222, connecting pipe; 223, return spring; 224, shaft gear; 225, lock block; 226, connecting groove portion; 227, convex end ; 230, second drive unit; 231, central axis rack; 232, position display cap; 233, cover; 300, action module; 310, drive rod; 320, valve plate; 330, moving iron core; 340, fixed iron core; 350, coil; 360, auxiliary opening unit; 361, balancing membrane assembly; 362, push rod; 400 circuit module; 410, circuit board; 420, air pressure sensor; 430, valve position sensor; 500, manual closing module; 510, push rod; 520, cover; 530, spring. DETAILED DESCRIPTION

[0037] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0038] In the preferred embodiment of the present invention, those skilled in the art should note that the coils, driving rods, etc. involved in the present invention may be regarded as prior art.

[0039] Preferred embodiment.

[0040] like Figure 1-11 As shown, the present invention discloses an intelligent normally closed emergency shut-off solenoid valve, comprising a valve body module 100 and an opening module 200, an action module 300 and a circuit module 400 installed on the valve body module 100, wherein:

[0041] The valve body module 100 includes a lower valve body 110 and an upper valve body 120, wherein the lower valve body 110 and the upper valve body 120 are fixedly connected. The lower valve body 110 is provided with a gas input end 111, a gas output end 112, and gas through holes 113 located at the gas input end 111 and the gas output end 112. The lower valve body 110 is also provided with a balancing chamber 114, and the balancing chamber 114 is connected to the gas input end 111 (through a small hole);

[0042] The opening module 200 includes a top cover 210, a first drive unit 220, and a second drive unit 230. The first drive unit 220 and the second drive unit 230 are both mounted on the top cover 210. The top cover 210 is fixedly mounted on the top of the upper valve body 120. The top cover 210 is provided with a gear channel 211 and a rack channel 212. The first drive unit 220 includes a handle 221, a connecting tube 222, a return spring 223, and a shaft gear 224. The second drive unit 230 includes a central shaft rack 231, a position indicating cap 232 (preferably red), and a (transparent) cover 233.

[0043] The action module 300 includes a driving rod 310 and a valve plate 320. The top of the driving rod 310 is fixedly connected to the bottom of the central axis rack 231, and the valve plate 320 is installed at the bottom of the driving rod 310. The valve plate 320 is located in the gas through hole 113.

[0044] The circuit module 400 includes a circuit board 410, an air pressure sensor 420 and a valve position sensor 430. The installation position of the air pressure sensor 420 is connected to the gas input end 111, and monitors the air pressure data of the gas in real time and transmits the air pressure data to the circuit board 410. The valve position sensor 430 (magnetic element) is located on one side of the drive rod 310 and monitors in real time whether the drive rod 310 is close, thereby transmitting the obtained valve position data to the circuit board 410 (when the solenoid valve is opened, the drive rod moves upward, thereby approaching the valve position sensor, thereby triggering the valve position sensor to generate a signal; when the solenoid valve is closed, the drive rod moves downward, thereby moving away from the valve position sensor, and then generating another signal after the trigger is released. The two signals can be used as valve position status). The circuit board 410 includes a first communication circuit and a second communication circuit. The first communication circuit and the second communication circuit are used to wirelessly transmit the obtained data.

[0045] Specifically, for the top cover 210, the gear channel 211 is connected to the rack channel 212, and a safety flip cover 213 is provided at one end of the gear channel 211;

[0046] With respect to the first driving unit 220, the first end of the rotating handle 221 is fixedly mounted on the first end of the connecting tube 222, and the first end of the rotating handle 221 is provided with a locking block 225, and the locking block 225 is used to be mounted on the locking hole of the safety flip cover 213 (when the safety flip cover is in the installed state, the locking block is mounted on the locking hole, so that the rotating handle cannot be rotated, thereby preventing the shut-off valve from being opened; when the safety flip cover is opened, the locking block is disengaged from the locking hole, so that the rotating handle can be rotated, thereby opening the shut-off valve). The second end of the connecting tube 222 and the rotating shaft gear 224 are both embedded in the gear channel 211, and the second end of the connecting tube 222 is provided with a connecting groove portion 226, the return spring 223 is sleeved on the second end of the connecting tube 222, and the rotating shaft gear 224 is provided with a connecting protrusion 227 at one end close to the connecting tube 222, and the connecting groove portion 226 is used to be inserted into the protrusion 227 (matching the shape of the connecting groove portion, the rotating shaft gear can be rotated by rotating the connecting tube during insertion);

[0047] For the second driving unit 230, the central axis rack 231 is installed on the rack channel 212 and the central axis rack 231 is engaged with the rotating shaft gear 224, the position indicating cap 232 is fixedly installed on the top of the central axis rack 231, and the cover 233 covers the position indicating cap 232 and the cover 233 is fixedly installed on the top of the rack channel 212.

[0048] More specifically, the action module 300 further includes a moving iron core 330, a fixed iron core 340, a coil 350 (powered by a circuit module) and an auxiliary opening unit 360. The moving iron core 330 and the fixed iron core 340 are both sleeved on the driving rod 310 and the moving iron core 330 is located above the fixed iron core 340. The coil 350 surrounds the moving iron core 330 and the fixed iron core 340 (when emergency shutoff is required, the coil is energized by the circuit module, thereby electromagnetic induction causes the moving iron core to be attracted and moved down to a position close to the fixed iron core, thereby releasing the restriction of the driving rod by components such as the steel ball and the groove portion (the restriction of the driving rod by components such as the steel ball and the groove portion belongs to the prior art, and reference can be made to patent CN118959678A), thereby driving the rod downward so that the valve plate covers the gas through hole, thereby achieving emergency shutoff);

[0049] The auxiliary opening unit 360 includes a balancing membrane assembly 361 and a push rod 362. The balancing membrane assembly 361 covers the balancing chamber 114 and surrounds and is fixed to the bottom of the push rod 362. The top of the push rod 362 is close to the gas through hole 113 (sometimes due to the high pressure of the gas, when the solenoid valve is opened, the gas enters from the gas input end, which will apply a downward force to the valve plate, thereby limiting the upward movement of the valve plate and causing it to be unable to open). When the solenoid valve needs to be opened, the gas enters the balancing chamber 114 from the gas input end 111 through the auxiliary hole, so that the gas provides an upward force to the balancing membrane assembly 361, driving the push rod 362 to move upward, thereby pushing open the valve plate 320 covering the gas through hole 113 (when the gas is under high pressure, the valve plate is pushed open by the push rod, thereby releasing the high pressure pressure, and finally allowing the moving iron core to move upward normally under the drive of electromagnetic force, etc.).

[0050] Furthermore, a manual closing module 500 is further included, which is mounted on the upper valve body 120. The manual closing module 500 includes a push rod 510, a cover 520, and a spring 530. The cover 520 covers the first end of the push rod 510, and the spring 530 is sleeved on the push rod 510.

[0051] (When both the AC power supply and the battery power supply of the circuit module fail, manual closing can be performed in an emergency) When manual closing is required, open the cover 520 and push the first end of the push rod 510 so that the second end of the push rod 510 is close to the moving iron core 330 and presses the moving iron core 330 downward through the inclined surface. After the driving rod 310 releases the restriction, it drives the valve plate 320 to move downward and cover the gas through hole 113 (to achieve manual emergency shut-off. After releasing the push rod, the push rod is reset due to spring compression).

[0052] Furthermore, the first communication circuit includes a communication chip U2 (a Bluetooth chip, also serving as a processing chip) and an antenna interface RF2. Pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 via an inductor SL1 (the end of the inductor SL1 away from pin 26 is electrically connected to pin 25), a resistor BR11, and a capacitor C2. Pin 16 of the communication chip U2 is electrically connected to the second end of the connector P7 (used to connect a pressure sensor (model MPM258) to detect the pressure of the gas in the gas shut-off valve) via a resistor R24. The communication chip U2 Pin 17 of the communication chip U2 is electrically connected to the first end of the connector P7 through a resistor R23; pin 22 of the communication chip U2 is electrically connected to the connector P6 (for connecting to a valve position sensor for detecting whether the current gas shut-off valve is open or closed) through a resistor R30, and the end of the resistor R30 close to the connector P6 is also electrically connected to pin 21 of the communication chip U2 (the first communication circuit is used for data processing to monitor the gas pressure value and valve position status of the gas shut-off valve, and is also used for Bluetooth communication to facilitate users to view data through terminals such as mobile phones when in the vicinity);

[0053] The second communication circuit includes a communication chip U3 (NB-IoT), an antenna interface RF1 and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 through resistor NR11 and capacitor CF1 in sequence. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 through resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 through resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2 (the second communication circuit performs remote communication through NB-IoT, and remotely transmits the data collected by the communication chip U2 to the background to facilitate remote data viewing).

[0054] Specifically, pin 18 of the communication chip U2 is grounded through a diode D1 and the cathode of the diode D1 is electrically connected to a connector P4 (P4 serves as an external signal interface and can be connected to sensors such as temperature for data collection).

[0055] More specifically, the second communication circuit also includes a SIM card holder (CARD1), pin 12 of the communication chip U2 is electrically connected to the C3 end of the SIM card holder through a resistor R13, pin 13 of the communication chip U2 is electrically connected to the C5 end of the SIM card holder through a resistor R15, pin 14 of the communication chip U2 is electrically connected to the C6 end of the SIM card holder through a resistor R14, and pin 15 of the communication chip U2 is electrically connected to the C1 end of the SIM card holder.

[0056] Furthermore, it also includes a voltage acquisition circuit, which includes a resistor R19 and a resistor R21, and the common end of the resistor R19 and the resistor R21 is electrically connected to the Schottky diode D6 (one end of the Schottky diode D6 is connected to the power supply terminal M4_AVCC and the other end is grounded. The current power supply status of the gas shut-off valve and whether the mains power is supplied to it can be determined through voltage acquisition).

[0057] Furthermore, a boost circuit is further included, the boost circuit including a boost chip U5 and a transistor SQ5, pin 1 of the transistor SQ5 is electrically connected to the battery power terminal (System_2.2-3.6V) through a diode FD3 and an inductor L3 in sequence, pin 1 of the boost chip U5 is electrically connected to the common terminal of the diode FD3 and the inductor L3, and pin 3 of the boost chip U5 is electrically connected to an end of the resistor R19 away from the resistor R18, pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 through a resistor R40, and pin 5 of the boost chip U5 is electrically connected to the battery power terminal on one path and electrically connected to pin 1 of the transistor SQ5 on the other path through capacitors C42 and C41;

[0058] Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 through resistor R22 and is electrically connected to the source of the field-effect transistor Q5 through resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 through resistor FR16 and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 through resistor FR8. The output end (pins 5-8) of the transistor SQ5 is connected to the coil load interface P5 (P5 is connected to the coil of the gas shut-off valve for energizing the coil, so that in the event of an emergency power outage (the mains power cannot energize the coil normally), the coil is energized by boosting the battery to achieve emergency shutoff and improve safety).

[0059] Preferably, for the opening module 200, when opening the emergency shut-off solenoid valve, the safety flip cover 213 is first opened to disengage the lock block 225 from the lock hole, and a force is applied to the rotating handle 221 toward the rotating shaft gear 224 so that the connecting groove portion 226 is inserted into the protruding end 227. At this time, the return spring 223 is compressed, and then the rotating handle 221 is rotated to drive the rotating shaft gear 224 to rotate together through the connecting tube 222, and finally drive the central axis rack 231 to move upward, thereby lifting the valve plate 320 through the driving rod 310 and no longer covering the gas through-hole 113 (the shut-off valve is quickly opened through the mechanical structure and force transmission);

[0060] When the central axis rack 231 moves up, the indicating cap 232 also moves up, so that the color of the indicating cap (red) can be seen through the transparent cover 233, so that it can be intuitively judged that the current emergency shut-off solenoid valve is in the open state (if it is not opened, the red color cannot be seen if the indicating cap does not move up, and the shut-off valve is judged to be in the closed state at this time); after opening, the turning handle 221 is released, and due to the compression force of the reset spring 223, the turning handle 221 returns to the initial position, and the connecting groove part 226 disengages from the protruding end 227, realizing safe return (later when it is closed by electromagnetic or manual closing, the central axis rack moves down, and the connecting groove part disengages from the protruding end, and cannot drive the turning handle to rotate, thereby improving safety).

[0061] It is worth mentioning that the technical features such as coils and drive rods involved in the patent application of this invention should be regarded as prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by conventional options in the field and should not be regarded as the inventive point of this patent. This patent will not be further elaborated.

[0062] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An intelligent normally closed emergency shut-off solenoid valve, characterized in that: It includes a valve body module and an opening module, an action module and a circuit module installed on the valve body module, wherein: The valve body module includes a lower valve body and an upper valve body, wherein the lower valve body and the upper valve body are fixedly connected, the lower valve body is provided with a gas input end, a gas output end, and gas through holes located at the gas input end and the gas output end, and the lower valve body is further provided with a balancing chamber, and the balancing chamber is communicated with the gas input end; The opening module includes a top cover, a first drive unit and a second drive unit. The first drive unit and the second drive unit are both mounted on the top cover. The top cover is fixedly mounted on the top of the upper valve body. The top cover is provided with a gear channel and a rack channel. The first drive unit includes a turning handle, a connecting pipe, a return spring and a rotating shaft gear. The second drive unit includes a central axis rack, a position indicating cap and a sealing cover. The action module includes a driving rod and a valve plate, the top of the driving rod is fixedly connected to the bottom of the central axis rack and the bottom of the driving rod is installed with the valve plate, and the valve plate is located in the gas through hole; The circuit module includes a circuit board, an air pressure sensor and a valve position sensor. The installation position of the air pressure sensor is connected to the gas input end, and monitors the gas pressure data of the gas in real time and transmits the air pressure data to the circuit board. The valve position sensor is located on one side of the driving rod and monitors in real time whether the driving rod is close, thereby transmitting the obtained valve position data to the circuit board. The circuit board includes a first communication circuit and a second communication circuit. The first communication circuit and the second communication circuit are used to wirelessly transmit the obtained data.

2. The intelligent normally closed emergency shut-off solenoid valve according to claim 1, characterized in that: For the top cover, the gear channel is connected to the rack channel, and a safety flip cover is provided at one end of the gear channel; For the first driving unit, the first end of the rotating handle is fixedly mounted on the first end of the connecting tube, and the first end of the rotating handle is provided with a locking block, and the locking block is used to be installed in the lock hole of the safety flip cover; the second end of the connecting tube and the rotating shaft gear are both built into the gear channel, and the second end of the connecting tube is provided with a connecting groove portion, the return spring is sleeved on the second end of the connecting tube, and the end of the rotating shaft gear close to the connecting tube is provided with a connecting protrusion, and the connecting groove portion is used to be inserted into the protrusion; For the second driving unit, the central axis rack is installed on the rack channel and the central axis rack is meshed with the rotating shaft gear, the position indicating cap is fixedly installed on the top of the central axis rack, the cover is covered on the position indicating cap and the cover is fixedly installed on the top of the rack channel.

3. The intelligent normally closed emergency shut-off solenoid valve according to claim 2, characterized in that: The action module further includes a moving iron core, a fixed iron core, a coil and an auxiliary opening unit, wherein the moving iron core and the fixed iron core are both sleeved on the driving rod and the moving iron core is located above the fixed iron core, and the coil surrounds the moving iron core and the fixed iron core; The auxiliary opening unit includes a balancing membrane assembly and a push rod. The balancing membrane assembly covers the balancing cavity and is surrounded and fixed to the bottom of the push rod. The top of the push rod is close to the gas through hole.

4. The intelligent normally closed emergency shut-off solenoid valve according to claim 3, characterized in that: Also included is a manual closing module installed on the upper valve body, the manual closing module includes a push rod, a cover and a spring, the cover covers the first end of the push rod and the spring is sleeved on the push rod, wherein: When manual closing is required, the cover is opened and the first end of the push rod is pushed so that the second end of the push rod is close to the moving iron core and presses the moving iron core downward through the inclined surface. After the driving rod releases the restriction, it drives the valve plate to move downward and cover the gas through hole.

5. The intelligent normally closed emergency shut-off solenoid valve according to claim 4, characterized in that: The first communication circuit includes a communication chip U2 and an antenna interface RF2. Pin 26 of the communication chip U2 is electrically connected to the antenna interface RF2 via an inductor SL1, a resistor BR11, and a capacitor C2. Pin 16 of the communication chip U2 is electrically connected to the second end of the connector P7 via a resistor R24. Pin 17 of the communication chip U2 is electrically connected to the first end of the connector P7 via a resistor R23. Pin 22 of the communication chip U2 is electrically connected to the connector P6 via a resistor R30, and an end of the resistor R30 close to the connector P6 is also electrically connected to pin 21 of the communication chip U2. The second communication circuit includes a communication chip U3, an antenna interface RF1 and a level conversion chip U4. Pin 27 of the communication chip U3 is electrically connected to the antenna interface RF1 through resistor NR11 and capacitor CF1 in sequence. Pin 9 of the communication chip U3 is electrically connected to pin 7 of the level conversion chip U4 through resistor R8, and pin 10 of the communication chip U3 is electrically connected to pin 6 of the level conversion chip U4 through resistor R9. Pin 2 of the level conversion chip U4 is electrically connected to pin 15 of the communication chip U2, and pin 3 of the level conversion chip U4 is electrically connected to pin 14 of the communication chip U2.

6. The intelligent normally closed emergency shut-off solenoid valve according to claim 5, characterized in that: Pin 18 of the communication chip U2 is grounded via a diode D1 and the cathode of the diode D1 is electrically connected to the connector P4; The second communication circuit also includes a SIM card holder, pin 12 of the communication chip U2 is electrically connected to the C3 end of the SIM card holder through a resistor R13, pin 13 of the communication chip U2 is electrically connected to the C5 end of the SIM card holder through a resistor R15, pin 14 of the communication chip U2 is electrically connected to the C6 end of the SIM card holder through a resistor R14, and pin 15 of the communication chip U2 is electrically connected to the C1 end of the SIM card holder.

7. The intelligent normally closed emergency shut-off solenoid valve according to claim 6, characterized in that: It also includes a voltage acquisition circuit, the voltage acquisition circuit includes a resistor R19 and a resistor R21, and a common terminal of the resistor R19 and the resistor R21 is electrically connected to the Schottky diode D6; The device further includes a boost circuit, the boost circuit including a boost chip U5 and a transistor SQ5, wherein pin 1 of the transistor SQ5 is electrically connected to the battery power supply terminal via a diode FD3 and an inductor L3 in sequence, pin 1 of the boost chip U5 is electrically connected to the common terminal of the diode FD3 and the inductor L3, and pin 3 of the boost chip U5 is electrically connected to an end of the resistor R19 away from the resistor R18, pin 4 of the boost chip U5 is electrically connected to pin 2 of the communication chip U2 via a resistor R40, and pin 5 of the boost chip U5 is electrically connected to the battery power supply terminal on one path and electrically connected to pin 1 of the transistor SQ5 on the other path via capacitors C42 and C41; Pin 3 of the boost chip U5 is electrically connected to pin 1 of the transistor SQ5 through resistor R22 and is electrically connected to the source of the field-effect transistor Q5 through resistor R31. The gate of the field-effect transistor Q5 is electrically connected to pin 1 of the communication chip U2 through resistor FR16, and the drain of the field-effect transistor Q5 is electrically connected to pin 4 of the transistor SQ5 through resistor FR8. The output end of the transistor SQ5 is connected to the coil load interface P5.

8. The intelligent normally closed emergency shut-off solenoid valve according to claim 7, characterized in that: As for the opening module, when opening the emergency shut-off solenoid valve, first open the safety flip cover to disengage the lock block from the lock hole, and apply a force to the rotating shaft gear on the turning handle so that the connecting groove part is inserted into the convex end. At this time, the return spring is compressed, and then the turning handle is rotated to drive the rotating shaft gear to rotate together through the connecting pipe, and finally drive the central axis rack to move upward, so that the valve plate is lifted up through the driving rod and no longer covers the gas through-hole; When the center axis rack moves up, the position indicating cap also moves up, so that the color of the position indicating cap can be seen through the transparent cover, so as to intuitively judge whether the current emergency shut-off solenoid valve is in the open state; After opening, release the handle, and due to the compression force of the return spring, the handle returns to the initial position, and the connecting groove part is separated from the convex end, achieving safe return.

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