Leakage-proof mechanical energy storage type automatic closing valve for industrial pipeline

Abstract

The invention discloses a leakproof mechanical energy storage type automatic closing valve for an industrial pipeline, which stores energy in the valve and is used for closing the valve by using the stored energy when power for closing the valve cannot be provided by the outside under an emergency condition. The device is mainly composed of a low-speed motor, a driving shaft, a gear system and a spring. And the valve controls the switch through the double-control switch in a normal power-on state. When the circuit is powered off or the temperature is too high, the electromagnet loses magnetic force, and the valve is automatically closed. A travel switch is arranged in the system and used for detecting rotation of the power output shaft, the electromagnet is triggered to work, and opening or closing of the valve is achieved. During starting, the motor drives the driving shaft to rotate, and the spring is tightened; during closing, the spring releases energy, and the valve is closed. The valve has self-checking and safety protection functions and is suitable for various industrial pipeline systems.

Description

Technical Field

[0001] The invention belongs to the technical field of valve equipment, and in particular relates to an industrial pipeline leakage-proof mechanical energy storage type automatic closing valve. Background Art

[0002] Valves are control components in pipeline fluid delivery systems, used to change the cross-section of the passage and the direction of medium flow. They have functions such as diversion, shut-off, throttling, check, diversion or overflow pressure relief. Valves used for fluid control come in a wide variety of varieties and specifications, from the simplest shut-off valves to various valves used in extremely complex automatic control systems. The nominal diameter of the valve ranges from extremely small instrument valves to industrial pipeline valves with a diameter of 10m. They can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioactive fluids. The working pressure of the valve can range from 0.0013MPa to ultra-high pressure of 1000MPa, and the working temperature can range from ultra-low temperature of c-270℃ to high temperature of 1430℃.

[0003] When chemical companies are carrying out production activities, if they encounter emergencies such as fire, they need to close the valves of flammable and explosive gases and liquids in time to prevent further fires and explosions. However, the old-style valves require people to enter the fire scene to manually close the valves, which is very likely to cause explosions and cause casualties.

[0004] When an explosive fire occurs, the factory's circuits are usually damaged, and some electric remote-controlled valves may be paralyzed and unable to close the valves in time. If there are flammable and explosive gases and liquids in the factory pipelines, if they are not closed in time, it may cause further explosions, resulting in greater property losses and casualties. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention aims to provide an industrial pipeline anti-leakage mechanical energy storage automatic closing valve, in which a certain amount of mechanical energy is stored in the valve device, that is, a tightened spring, which is used to close the valve automatically without external energy under special circumstances to prevent danger.

[0006] In order to solve the technical problem, the technical solution of the present invention is:

[0007] An industrial pipeline anti-leakage mechanical energy storage type automatic closing valve, comprising: a low-speed motor, a driving shaft, a second gear, a third gear and an energy storage device;

[0008] The low-speed motor drives the active shaft to rotate, the active power shaft is sleeved with a first gear, the lower end of the active power shaft is installed with a first electromagnet, the first gear meshes with a second gear, the second gear meshes with a third gear, the third gear is sleeved with an energy storage shaft, and the energy storage device is connected through the energy storage shaft; a limit plate is arranged at the lower part of the second gear, the second gear and the limit plate are both sleeved with a power output shaft, a second electromagnet is installed on the limit plate, and the lower end of the power output shaft is connected with a butterfly valve; when the power is normally on, the valve is controlled to be opened or closed by the double-control switch, the first electromagnet remains in a powered state, and the first gear and the second gear remain in a meshed state; when the overall circuit is powered off or the temperature sensor detects an excessively high temperature, the first electromagnet and the second electromagnet are powered off and lose their magnetic force, and the second gear is driven by the energy storage device to automatically close the valve.

[0009] Furthermore, it also includes: a travel switch, which is installed at the upper end of the power output shaft and is used for position detection; the travel switch detects the rotational position of the power output shaft, and when the power output shaft rotates to a set angle, the travel switch is triggered, and the travel switch closes or opens the circuit when triggered. When the power output shaft rotates 90°, the travel switch is triggered, and the second electromagnet starts to be energized.

[0010] Furthermore, under normal power-on state, when the valve rotates from closed to open: press the double-control switch, at this time the second electromagnet is disconnected, the second electromagnet loses its magnetic force, the iron core is pulled back by the spring, and at the same time the non-metallic contact clamped on the limit plate is retracted, the limit plate is fixed on the power output shaft, and while the iron core is pulled back, the copper sheet contact in the second electromagnet is pushed to contact, the circuit is turned on, and the low-speed motor starts to power and rotate, driving the power output shaft to rotate through the second gear, and at the same time the energy storage device that has not stored energy also starts to rotate, storing energy in the energy storage device, and when the power output shaft rotates 90°, the travel switch is triggered, at this time the second electromagnet changes from disconnected to open, the iron core is attracted downward, the contacted copper sheet contact is disconnected, the low-speed motor stops rotating, and at the same time the non-metallic contact is pushed downward to clamp the limit plate, and the valve opening work is completed.

[0011] Furthermore, under normal power-on state, when the valve rotates from open to closed: it is necessary to press the double-control switch, at this time the second electromagnet is disconnected, the second electromagnet loses its magnetic force, the iron core is pulled back by the spring, and at the same time the non-metallic contact clamped on the limit plate is retracted, the limit plate is fixed on the power output shaft, and while the iron core is pulled back, the copper sheet contact in the second electromagnet is pushed to contact, the circuit is turned on, and the low-speed motor starts to supply power and rotate in reverse, driving the power output shaft to rotate through the second gear, and the energy storage device after storing energy also starts to rotate in reverse. When the power output shaft rotates 90°, the travel switch is triggered, and at this time the second electromagnet changes from disconnected to open, the iron core is attracted downward, the contacted copper sheet contact is disconnected, the low-speed motor stops rotating, and at the same time the non-metallic contact is pushed downward to clamp the limit plate, and the valve closing work is completed.

[0012] Furthermore, it also includes: a main power shaft sleeve; the power shaft of the low-speed motor is sleeved and fixed with one end of the main power shaft sleeve, and the other end of the main power shaft sleeve is sleeved with the main power shaft, and the main power shaft can move up and down in the main power shaft sleeve.

[0013] Furthermore, when the overall circuit is powered off or the temperature sensor detects an excessively high temperature, the first electromagnet will lose its magnetic force due to power failure. At this time, the iron core in the first electromagnet is pushed by the spring, and at the same time drives the non-metallic contact, the first gear, and the main power shaft to move upward, so that the first gear is disengaged from the second gear; at the same time, the second electromagnet is disconnected, the electromagnet loses its magnetic force, the iron core is pulled back by the spring, and the non-metallic contact stuck on the limit plate is retracted. At this time, the energy storage device after storing energy begins to rotate as a power source, driving the power output shaft to rotate, and then closing the valve.

[0014] Furthermore, the energy storage device adopts a spring or a torsion spring.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] When facing a fire, an industrial pipeline anti-leakage mechanical energy storage automatic closing valve can sense the high temperature signal through the temperature sensor at the early stage of the fire and automatically close the valve. This not only eliminates the potential danger of casualties caused by explosions when personnel enter the fire scene to manually close the valve, but also prevents the fire from spreading further.

[0017] When facing an explosive fire, the circuit may be broken. At this time, the electric valve loses power and it is difficult for personnel to enter the fire scene to manually close the valve. An industrial pipeline anti-leakage mechanical energy storage automatic closing valve can start to close the valves of flammable and explosive gases and liquids through the stored mechanical energy at the moment the circuit is broken, preventing the explosion from happening again. This protects people's lives and safety to the greatest extent and greatly reduces the property losses of public enterprises.

[0018] Mechanical energy storage systems usually involve relatively simple mechanical components, such as springs and gears. The design and integration of these components are relatively straightforward, avoiding complex electrical or electronic component configurations, simplifying the design and assembly process. Because the mechanical components are relatively small and easy to handle, they can be easily integrated into existing systems without the need for complex electrical connections, control logic, and components.

[0019] Mechanical energy storage devices usually have no electronic components and are not susceptible to environmental changes and power fluctuations, so they are more durable and have a long life. Compared with electrical systems, mechanical components have a lower failure rate. The failure mechanism of mechanical energy storage systems is usually simple and can be solved by physical repair or replacement of parts.

[0020] Compared with other energy storage technologies, mechanical energy storage usually has higher energy conversion efficiency and can directly convert stored mechanical energy into power output. It can quickly release stored energy in a short period of time and is suitable for applications that require rapid response to changes.

[0021] It is usually cheaper to manufacture simple mechanical components (such as springs, gears, etc.) than high-performance batteries or other energy storage technologies. Mechanical energy storage systems are usually simpler and more economical to maintain, mainly requiring regular inspection and lubrication, avoiding frequent replacement of batteries or complex electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , the overall structure diagram of an industrial pipeline anti-leakage mechanical energy storage type automatic closing valve of the present invention;

[0023] Figure 2 , the wiring diagram of the travel switch provided by the present invention;

[0024] Figure 3 , a structural diagram of the limit plate provided by the present invention;

[0025] Figure 4 , the overall wiring diagram of the device of the present invention;

[0026] Figure 5 , an enlarged view of the second electromagnet structure.

[0027] Reference numerals

[0028] 1- low-speed motor; 2- main power shaft sleeve; 3- main power shaft; 4- first gear; 5- first electromagnet; 6- copper sheet contact; 7- temperature sensor; 8- butterfly valve; 9- travel switch; 10- second gear; 11- third gear; 12- energy storage device; 13- second electromagnet; 14- limit plate; 15- power output shaft; 16- fixed plate; 17- first bearing; 18- second bearing; 19- energy storage shaft. DETAILED DESCRIPTION

[0029] The specific implementation mode of the present invention is described below in conjunction with embodiments:

[0030] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0031] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0032] Embodiment 1:

[0033] like Figure 1 As shown, the present invention uses a low-speed motor 1 as a power source under normal circumstances, and the power shaft of the low-speed motor 1 is fixed to one end of the main power shaft sleeve 2, and the other end of the main power shaft sleeve 2 is connected to the main power shaft 3, and a part of the space is reserved inside the main power shaft sleeve 2 for the main power shaft 3 to move up and down. The lower end of the main power shaft 3 is fixed to the first gear 4. When the first electromagnet 5 is energized, the iron core is attracted by the magnetic force, driving the non-ferrous contact on the upper part of the electromagnet, the first gear 4, and the main power shaft 3 to fall at the same time, so that the first gear 4 is engaged with the second gear 10. At this time, the second gear 10 drives the power output shaft 15 fixed thereto to rotate, and the power output shaft 15 is connected to the butterfly valve 8, thereby controlling the rotation of the valve. At the same time, the second gear 10 is engaged with the third gear 11, and the third gear 11 is fixed to the energy storage shaft 19, and the energy storage shaft 19 is connected to the energy storage device 12 below, so that during the rotation of the second gear 10, the energy storage device 12 simultaneously stores or releases energy.

[0034] Iron core: The iron core is usually located in the central part of the electromagnet. It is the core component of the electromagnet and is used to enhance the strength of the electromagnetic field. The function of the iron core is to generate a strong magnetic field when current passes through it.

[0035] Non-ferrous contacts: Non-ferrous contacts are usually located on the top or side of the electromagnet and are usually used to connect to the current source or load. Their main function is to provide a contact point so that the circuit can be closed or opened when the electromagnet is working.

[0036] like Figure 5As shown, the copper sheet contact 6 is usually located near the non-ferrous contact and is responsible for making the circuit on and off. When the electromagnet is powered off, the two copper sheets are pushed to the connection point by the iron core. When the power is on, the iron core is attracted by the magnetic force and the spring is stretched. Copper is a good conductor and is therefore usually used as a contact material to reduce resistance and heat loss.

[0037] Figure 2 This is the wiring diagram of the travel switch. Under normal circumstances, when the valve rotates from closed to open, it is necessary to press the double-control switch 20. At this time, the second electromagnet 13 is disconnected, the second electromagnet 13 loses its magnetic force, and the iron core is pulled back by the spring; at the same time, the non-metallic contact stuck on the limit plate 14 is retracted, and the limit plate 14 is fixed on the power output shaft 15. When the iron core is pulled back, the copper sheet contact 6 in the electromagnet is pushed to contact. At this time, the low-speed motor 1 starts to power supply and rotate, driving the power output shaft 15 to rotate. At the same time, the energy storage device 12 also starts to store energy and tightens the spring. When the power output shaft 15 rotates 90°, the travel switch 9 is triggered. At this time, the second electromagnet 13 starts to power supply, the iron core is attracted downward, the contacting copper sheet contact 6 is disconnected, the low-speed motor 1 stops rotating, and the non-metallic contact is pushed downward to clamp the limit plate 14. The valve opening work is completed, and the limit plate is as shown in FIG. Figure 3 described.

[0038] Under normal circumstances, when the valve rotates from opening to closing, the steps are the same as above, except that the low-speed motor 1 is reversed and the energy storage device 12 starts to release energy to assist the motor in closing the valve.

[0039] like Figure 4 As shown, the first electromagnet 5 is always powered on under normal circumstances, that is, when there is no high temperature triggering the temperature control switch and no overall circuit power failure, so the first gear and the second gear are always in meshing state and do not change with the opening and closing of the valve under normal circumstances. Under special circumstances, when the overall circuit is powered off or the temperature sensor detects an excessively high temperature, the first electromagnet 5 will lose its magnetic force due to power failure. At this time, the iron core in the first electromagnet 5 is pushed by the spring, and at the same time, the non-metallic contact, the first gear 4, and the main power shaft 3 move upward, so that the first gear 4 and the second gear 10 are disengaged. At the same time, the second electromagnet 13 is disconnected, the electromagnet loses its magnetic force, the iron core is pulled back by the spring, and the non-metallic contact stuck on the limit plate 14 is retracted. At this time, the tightened spring 12 begins to rotate as a power source, driving the power output shaft 15 to rotate, and then closing the valve.

[0040] The overall components include:

[0041] Temperature sensor: such as NTC thermistor or digital temperature sensor (MCP9808).

[0042] Comparator or microcontroller: to judge the temperature sensor output (such as Arduino, LM358).

[0043] Relay: A switch used to control power, connected to the power management of the solenoid valve.

[0044] Double control switch: provides two or more positions to control the opening / closing of the valve.

[0045] The first electromagnet: used to control the main power shaft and the first gear, responsible for the action of the valve.

[0046] Second electromagnet: used to control the forward and reverse movement of the valve to increase safety.

[0047] Travel switch: Feedback the switch status of the valve to enhance system reliability.

[0048] Power module: provides power to the entire system.

[0049] The overall process is as follows:

[0050] Temperature Monitoring: The temperature sensor monitors the ambient temperature in real time and sends the data to a comparator or microcontroller.

[0051] Threshold setting: Set the high temperature threshold (e.g. 70°C) in the comparator or microcontroller.

[0052] Temperature comparison:

[0053] If the temperature exceeds the set threshold:

[0054] The comparator sends a signal to drive the relay, cutting off the power supply to the solenoid valve.

[0055] The first electromagnet, the second electromagnet, and the low-speed motor lose power, and the corresponding control force disappears, and the valve will return to a safe state (closed) according to the design (such as spring rebound).

[0056] Fault conditions or alarms can be provided via LED indicators or buzzers to alert the operator of excessive temperatures or valve actuation completion, which can be achieved via signals sent by travel switch sensors.

[0057] Embodiment 2:

[0058] Use other mechanical energy storage methods to store energy, such as springs, specifically torsion springs. A torsion spring is a spring that can store mechanical energy, and it mainly stores and releases energy by twisting. Unlike ordinary compression springs and tension springs, torsion springs are designed to twist in the axial direction; torsion springs are usually made of metal materials (such as steel) and have a certain degree of stiffness and elasticity. Its shape is usually a rotating spiral. The two ends of the torsion spring can be fixed to other components so that it twists when force is applied. When an external force (energy storage shaft 19) acts on one end of the torsion spring, the material twists, thereby storing mechanical energy. The other end is connected to a fixed plate, and when the external force is removed or changed, the torsion spring will return to its original untwisted state due to its elastic reaction force, releasing the stored energy. Example 3:

[0059] Store electrical energy through batteries or supercapacitors to adapt to rapid changes in system power demand. The design uses rechargeable batteries or supercapacitors to power the valve control circuit and automatically switch in the event of power failure.

[0060] In the automatic valve control system, energy storage batteries (such as lithium-ion batteries, lead-acid batteries) or supercapacitors are used to store electrical energy and provide power to solenoid valves or other control components when the system needs it. This ensures that the system can still reliably operate the valve even if the main power fails.

[0061] Energy storage system design

[0062] Selection of energy storage equipment

[0063] Lithium-ion battery: high energy density, suitable for situations where long-term operation is required, with high charging and discharging efficiency and long life.

[0064] Lead-acid batteries: low cost, suitable for short-term emergency power supply, mature technology. Supercapacitors: fast charging and discharging capabilities, suitable for applications that require high current and short-term power supply.

[0065] Calculation of energy storage capacity

[0066] To ensure that the energy storage system can maintain normal operation of the valve during a power outage, the capacity of the battery or capacitor needs to be calculated first.

[0067] Determine the load power: Determine the working power of the valve control system, mainly including the power consumption of the solenoid valve, motor, etc.

[0068] Run time requirement: Calculate how long the system needs to continue to operate in the event of a main power outage (e.g., 5 minutes, 15 minutes, or more).

[0069] Energy storage capacity calculation: Select the appropriate battery or capacitor capacity based on the calculation to ensure that it can provide sufficient power for the valve.

[0070] Charging and power switching system design

[0071] Charging control circuit

[0072] To ensure that the battery or capacitor is always in good condition, a smart charging system can be designed:

[0073] Charging controller: Use a dedicated battery management system (BMS) or supercapacitor charging controller to monitor the battery's charging and discharging status in real time to prevent overcharging and over-discharging.

[0074] Charging process: When the system is operating normally, the power supply charges the battery or capacitor, keeping it fully charged so that it can provide energy immediately when the power is off.

[0075] Dynamic monitoring: Ensure the safety of the charging process by monitoring battery voltage, current and temperature.

[0076] Power switching system

[0077] To automatically switch between primary and backup power sources, use an automatic transfer switch (ATS) or a power management module (PMM):

[0078] When main power is working: the valve system is powered by the main power supply and the battery or capacitor is charged at the same time.

[0079] When the main power fails: When the main power fails, the system will automatically switch to the energy storage power supply (such as lithium battery or super capacitor) to ensure that the solenoid valve and control system continue to work.

[0080] Restoring main power: Once main power is restored, the system automatically switches back to main power operation while recharging the battery.

[0081] Control logic and monitoring system design

[0082] Control Logic

[0083] Normal operation mode: The main power supply is used, the system keeps the battery fully charged, and the solenoid valve is directly controlled by the power supply. When the valve needs to be opened / closed, the main power supply drives the solenoid valve to perform the operation.

[0084] Emergency operation mode: When the main power fails, the control system automatically supplies power from the battery or supercapacitor to ensure normal operation of the valve. The system detects the change in the main power voltage through the sensor and instantly switches to the backup power supply.

[0085] Monitoring feedback: The system can provide users with real-time power status feedback (such as battery level, main power status, etc.) through LED indicators, buzzers or display screens, so that operators can understand the system status in a timely manner.

[0086] Sensors and protection devices

[0087] Voltage sensor: monitors the voltage of the battery or supercapacitor. When the voltage is lower than the set value, an alarm is triggered and emergency shutdown operations are performed first to prevent valve failure due to insufficient energy.

[0088] Temperature sensor: used to detect battery temperature, prevent overheating, and ensure the safety of charging and discharging.

[0089] Protection and safety mechanisms

[0090] In order to ensure the safety of the energy storage system, multiple protection mechanisms must be designed:

[0091] Overcharge protection: Prevents the battery from being damaged by overcharging.

[0092] Over-discharge protection: When the battery or supercapacitor is too low in power, the power supply is cut off to prevent deep discharge from damaging the energy storage device.

[0093] Temperature protection: When the temperature is too high, charging or discharging will be automatically stopped to prevent danger caused by excessive temperature.

[0094] The automatic valve controls the fluid flow through the solenoid valve. Batteries and supercapacitors are integrated into the system. Once the main power supply is lost, the system can switch to the backup battery to ensure that the valve continues to operate and closes safely in an emergency.

[0095] By integrating an electric energy storage system, the automatic valve control system can continue to operate safely in the event of a main power failure. The energy stored in batteries or supercapacitors can provide short-term or long-term power for the solenoid valve, ensuring high reliability and stability of the system. Reasonable control logic and monitoring system design can improve the intelligence of the system and ensure that the equipment can work efficiently under various conditions.

[0096] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0097] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. An industrial pipeline anti-leakage mechanical energy storage type automatic closing valve, characterized in that: include: A low-speed motor (1), a driving shaft (3), a second gear (10), a third gear (11) and an energy storage device (12); The low-speed motor (1) drives the driving shaft (3) to rotate; the main power shaft (3) is sleeved with a first gear (4); the lower end of the main power shaft (3) is provided with a first electromagnet (5); the first gear (4) is meshed with a second gear (10); the second gear (10) is meshed with a third gear (11); the third gear (11) is sleeved with an energy storage shaft (19) and connected to an energy storage device (12) via the energy storage shaft (19); a limiting plate (14) is provided at the lower part of the second gear (10); the second gear (10) and the limiting plate (14) are both sleeved with a power output shaft ( 15), a second electromagnet (13) is installed on the limit plate (14), and the lower end of the power output shaft (15) is connected to a butterfly valve (8); when in a normal power-on state, the valve is opened or closed by a double-control switch (20), the first electromagnet (5) remains powered, and the first gear (4) and the second gear (10) remain in a meshing state; when the entire circuit is powered off or the temperature sensor (7) detects an excessively high temperature, the first electromagnet (5) and the second electromagnet (13) are powered off and lose their magnetic force, and the energy storage device (12) drives the second gear (10) to automatically close the valve.

2. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: Also includes: A travel switch (9) is installed at the upper end of the power output shaft (15) and is used for position detection. The travel switch detects the rotational position of the power output shaft (15). When the power output shaft (15) rotates to a set angle, the travel switch (9) is triggered. When the travel switch (9) is triggered, the circuit is closed or disconnected. When the power output shaft (15) rotates 90°, the travel switch (9) is triggered and the second electromagnet (13) starts to be energized.

3. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: In the normal power-on state, when the valve rotates from closed to open: the double-control switch (20) is pressed, and the second electromagnet (13) is short-circuited, the second electromagnet (13) loses its magnetic force, the iron core is pulled back by the spring, and at the same time, the non-metallic contact connected to the limit plate (14) is retracted, and the limit plate (14) is fixed on the power output shaft (15). When the iron core is pulled back, the copper sheet contact (6) in the second electromagnet (13) is pushed to contact, and the circuit is turned on. At this time, the low-speed motor (1) starts to be powered and rotate. , the power output shaft (15) is driven to rotate through the second gear (10), and the energy storage device (12) that has not stored energy also starts to rotate, and the energy storage device is stored with energy. When the power output shaft (15) rotates 90 degrees, the travel switch (9) is triggered, and the second electromagnet (13) starts to supply power, the iron core is attracted downward, the contacting copper sheet contact (6) is disconnected, the low-speed motor (1) stops rotating, and the non-metallic contact is pushed downward to clamp the limit plate (14), and the valve opening work is completed.

4. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: In the normal power-on state, when the valve rotates from open to closed, the double-control switch (20) needs to be pressed, and the second electromagnet (13) is disconnected, the second electromagnet (13) loses its magnetic force, the iron core is pulled back by the spring, and the non-metallic contact connected to the limit plate (14) is retracted, and the limit plate (14) is fixed on the power output shaft (15). When the iron core is pulled back, the copper contact (6) in the second electromagnet (13) is pushed to contact, and the circuit is turned on. At this time, the low-speed motor (1) starts The power is supplied for reverse rotation, and the power output shaft (15) is driven to rotate through the second gear (10). At the same time, the energy storage device (12) after storing energy also starts to rotate in the reverse direction. When the power output shaft (15) rotates 90 degrees, the travel switch (9) is triggered. At this time, the second electromagnet (13) starts to supply power, the iron core is attracted downward, the contacting copper sheet contact (6) is disconnected, the low-speed motor (1) stops rotating, and the non-metallic contact is pushed downward to clamp the limit plate (14), and the valve closing work is completed.

5. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: Also includes: A main power shaft sleeve (2); the power shaft of the low-speed motor (1) is sleeved and fixed to one end of the main power shaft sleeve (2), and the other end of the main power shaft sleeve (2) is sleeved to the main power shaft (3), and the main power shaft (3) can move up and down in the main power shaft sleeve (2).

6. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: When the whole circuit is powered off or the temperature sensor (7) detects an excessively high temperature, the first electromagnet (5) loses its magnetic force due to the power failure. At this time, the iron core in the first electromagnet (5) is pushed by the spring, and at the same time drives the non-metallic contact, the first gear (4), and the main power shaft (3) to move upward, so that the first gear (4) and the second gear (10) are disengaged; at the same time, the second electromagnet (13) is disconnected, the electromagnet loses its magnetic force, the iron core is pulled back by the spring, and at the same time the non-metallic contact stuck on the limit plate (14) is retracted. At this time, the energy storage device (12) after storing energy starts to rotate as a power source, driving the power output shaft (15) to rotate, thereby closing the valve.

7. The industrial pipeline anti-leakage mechanical energy storage type automatic closing valve according to claim 1 is characterized in that: The energy storage device (12) is a spring or a torsion spring.

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