Self-holding fire electromagnetic valve with bistability

Abstract

The application discloses a self-holding fire-fighting electromagnetic valve with bistable state and relates to the technical field of valves.The self-holding fire-fighting electromagnetic valve with bistable state comprises a valve body, the valve body comprises a valve body, a circular blind hole is formed in the right side of the valve body, a valve box is communicated with the top of the valve body, the bottom of the valve box is communicated with the blind hole in the right side of the valve body, a turbulence accelerating mechanism is communicated with the front face of the valve body, the turbulence accelerating mechanism comprises a rear accelerating pipe, a main pipe and an eccentric blade, the turbulence accelerating mechanism is communicated with the blind hole in the right side of the valve body, and the top of the valve body is fixedly connected with a vibration unblocking mechanism.The self-holding fire-fighting electromagnetic valve with bistable state is provided with a magnetic guide bracket, a lubricating copper sleeve, a vibration unblocking mechanism and a turbulence accelerating mechanism, the movable iron core is stably fixed after being opened, the vertical unblocking and the horizontal unblocking of the valve passage are realized, and the reliability of the valve is improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology, specifically to a bistable self-holding fire-fighting solenoid valve. Background Technology

[0002] Solenoid valves are electromagnetically controlled industrial devices and are basic automated components used to control fluids. In the spraying and extinguishing process of energy storage fire protection systems, solenoid valves are often used to control the spraying of extinguishing media such as aerosols.

[0003] Patent application CN202501083U discloses a self-holding fire-fighting solenoid valve with a manual device, including an upper valve body, a lower valve body, and a solenoid coil. A fixed iron core is provided at the top of the inner cavity of the upper valve body. The fixed iron core is connected to the moving iron core through a reset spring. A sealing gasket is provided at the lower end of the moving iron core. The lower valve body includes an inlet, an outlet, a valve port, and a piston. A self-holding valve control device is provided on one side of the upper valve body, and a manual valve opening device is provided on the other side.

[0004] The manual release mechanism of this self-holding fire-fighting solenoid valve with a manual release device is susceptible to failure due to various factors when it is not used for extended periods, thus affecting the reliability of the solenoid valve in critical moments. In particular, since aerosols are dispersion systems formed by solid or liquid particles stably suspended in a gaseous medium, after the aerosol fire extinguishing device is discharged, the generated aerosol particles adhere to the surfaces of the internal components of the solenoid valve, are difficult to clean, and gradually clog the valve, affecting its reliability in both long-term and secondary use. Therefore, improvements are needed. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a bistable self-holding fire-fighting solenoid valve to solve the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a bistable self-holding fire solenoid valve, comprising a valve body, the valve body including a valve body, a circular blind hole opened on the right side of the valve body, a valve box connected to the top of the valve body, the bottom of the valve box connected to the blind hole on the right side of the valve body, a turbulence acceleration mechanism connected to the front of the valve body, the turbulence acceleration mechanism connected to the blind hole on the right side of the valve body, and a vibration unblocking mechanism fixedly connected to the top of the valve body;

[0007] The turbulence acceleration mechanism includes:

[0008] The rear acceleration tube is connected to the front of the valve body and is used to accelerate the fire extinguishing medium fluid when it enters the valve body.

[0009] The main tube is connected to the front of the rear acceleration tube to restrict the flow direction of the extinguishing medium.

[0010] Eccentric blades are fixedly connected to the front of the main tube and are used to stir and disperse the extinguishing medium to prevent the extinguishing medium from clogging.

[0011] This invention provides a fire-fighting solenoid valve. It has the following beneficial effects:

[0012] 1. This bistable self-holding fire solenoid valve, by setting a magnetic guide bracket and cooperating with a permanent magnet, achieves stable fixation of the movable iron core after it is opened, which improves the stability of the valve in the open state. By cooperating with the movable iron core and rotating scraper, vertical clearing is achieved when the valve is opened and closed, and horizontal clearing is achieved when the fire extinguishing medium flows into the valve, preventing valve blockage caused by channel blockage and improving the reliability of the valve.

[0013] 2. This bistable self-holding fire solenoid valve, by setting a lubricating copper sleeve in conjunction with a one-way valve head, achieves lubrication of the one-way valve head during sliding, preventing valve blockage caused by the one-way valve head sticking, and improving the reliability of valve control in the opening and closing state. Through the cooperation of the lubricating copper sleeve and the vibration unblocking mechanism, the vibration is transmitted to the lubricating copper sleeve, thereby loosening the lubricating copper sleeve and the one-way sliding head, preventing valve blockage caused by the one-way valve head sticking.

[0014] 3. This bistable self-holding fire-fighting solenoid valve, by setting up a turbulence acceleration mechanism, uses eccentric blades to stir and turbulent the fire-fighting medium entering the valve, preventing the fire-fighting medium from agglomerating and causing valve blockage, thereby improving the reliability of the valve when controlling the opening and closing state. At the same time, the vibration generated by the rotation of the eccentric blades can prevent the fire-fighting medium from adhering inside the pipe body and causing blockage of the turbulence acceleration mechanism, thereby further improving the reliability of the valve.

[0015] 4. This bistable self-holding fire-fighting solenoid valve accelerates and disperses the extinguishing medium entering the turbulence acceleration mechanism and valve body by setting up a two-stage acceleration tube mechanism before and after the valve. This increases the flow velocity of the extinguishing medium to a certain extent, prevents the extinguishing medium from agglomerating and sticking to block the valve, and thus improves the reliability of the valve. The acceleration tube mechanism and the eccentric blade mechanism work together to improve the dispersion effect of the extinguishing medium, further improving the reliability of the valve. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the back side of the present invention;

[0018] Figure 3 This is a right-side sectional view showing the positional relationship between the valve body and the valve box of the present invention.

[0019] Figure 4 For the present invention Figure 3 Enlarged schematic diagram of the structure at point B in the diagram;

[0020] Figure 5 This is a schematic diagram showing the positional relationship between the movable iron core and the sealing head of the present invention;

[0021] Figure 6 This is a rear sectional view showing the positional relationship between the magnetic shielding tube body and the magnetic shielding collar of the present invention.

[0022] Figure 7 This is a bottom schematic diagram of the overall structure of the magnetic shielding collar of the present invention;

[0023] Figure 8 This is a rear sectional view showing the positional relationship between the valve body and the valve box of the present invention;

[0024] Figure 9 This is a schematic diagram of the overall structure of the magnetic guide support of the present invention;

[0025] Figure 10 This is a cross-sectional view of the internal structure of the front acceleration tube of the present invention;

[0026] Figure 11 This is a cross-sectional view of the internal structure of the main tube of the present invention;

[0027] Figure 12 This is a schematic diagram of the overall structure of the eccentric blade of the present invention;

[0028] Figure 13 For the present invention Figure 1 Enlarged schematic diagram of the structure at point A in the diagram;

[0029] Figure 14 For the present invention Figure 8 A magnified schematic diagram of the structure at point C.

[0030] In the diagram: 1. Valve body; 11. Valve body; 12. Cover plate; 13. Parallel connection port; 14. Lubricating copper sleeve; 15. One-way valve head; 17. Nozzle; 2. Valve box; 21. Magnetic shielding tube seat; 211. Magnetic shielding tube body; 212. Magnetic shielding collar; 22. Valve shell; 221. Shell; 222. Connector cover; 23. Magnetic guide bracket; 231. Main frame; 232. Permanent magnet; 24. Coil tube; 25. Magnetic guide plate; 26. Fixed iron core; 27. Movable iron core; 271. Core body; 272. Rotating scraper; 28. Sealing head; 3. Turbulence accelerator Structure; 31. Front accelerator tube; 311. Front tube body; 312. Front spoiler; 32. Main tube; 321. Tube body; 322. Cross bracket; 33. Eccentric blade; 331. Power motor; 332. Long curved blade; 333. Short curved blade; 34. Rear accelerator tube; 341. Rear tube body; 342. Rear spoiler; 4. Vibration unblocking mechanism; 41. Motor bracket; 42. Vibration motor; 43. Eccentric trigger wheel; 44. Impact rod; 441. Rod body; 442. Contact plate; 443. Limiting plate; 444. Rubber impact head. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0033] Example 1: Please refer to Figure 1-9This invention provides a technical solution: a bistable self-holding fire-fighting solenoid valve, comprising a valve body 1, the valve body 1 including a valve body 11, a circular blind hole on the right side of the valve body 11, a circular blind hole on the top of the valve body 11, a circular hole at the bottom of the circular blind hole communicating with the blind hole on the right side of the valve body 11, the circular hole being located to the left of the blind hole on the right side of the valve body 11, a circular short pipe communicating with the top of the circular hole, a cover plate 12 fixedly connected to the right side of the valve body 11 by bolts, and a parallel connection port 13 communicating with the back of the valve body 11 for connecting other pipelines and solenoid valves, the parallel connection port 13 communicating with the circular hole at the top of the valve body 11. The blind hole is connected to the valve body 11. A lubricating copper sleeve 14 is fixedly connected inside the blind hole on the right side of the valve body 11. The lubricating copper sleeve 14 is made of copper and has graphite material embedded on its inner surface. A one-way valve head 15 is slidably connected inside the lubricating copper sleeve 14. The lubricating copper sleeve 14 is used to lubricate the sliding process of the one-way valve head 15. There are circular through holes on the left and right sides of the one-way valve head 15. A nozzle 17 is fixedly connected inside the blind hole on the right side of the valve body 11. The nozzle 17 is located on the left side of the cover plate 12. A rubber pad is fixedly connected between the nozzle 17 and the cover plate 12. There are two circular blind holes on the top of the valve body 11, and the other one is located on the top of the lubricating copper sleeve 14.

[0034] The top of the valve body 11 is connected to a valve box 2, and the bottom of the valve box 2 is connected to a blind hole on the right side of the valve body 11. The valve box 2 includes a magnetic shielding tube seat 21, which is used to prevent the magnetic shielding tube seat 21 from being completely attracted to the iron core and affecting the movement of the iron core. The magnetic shielding tube seat 21 includes a magnetic shielding tube body 211, the bottom of which is connected to the blind hole at the top of the valve body 11. An O-ring is fitted between the bottom of the magnetic shielding tube body 211 and the blind hole at the top of the valve body 11. A round tube is fixedly connected to the top of the magnetic shielding tube body 211, and a valve shell 22 is fixedly connected to the top of the magnetic shielding tube body 211. A magnetic shielding collar 212 is fixedly connected to the bottom of the magnetic shielding tube body 211 to prevent the moving iron core 27 from being directly attracted to the inner wall of the blind hole at the top of the valve body 11. The valve housing 22 includes a housing 221. The bottom of the housing 221 is fixedly connected to the top of the magnetic shielding tube 211. The bottom of the housing 221 is sleeved with the top of the magnetic shielding tube 211. A connector cover 222 is connected to the front of the housing 221. A fixed iron core 26 is fixedly connected to the top of the round tube of the housing 221. A magnetic plate 25 is fixedly connected to the top of the fixed iron core 26 by screws. It is used to transmit magnetism to the fixed iron core 26. The magnetic plate 25 is inserted into the top of the housing 221. A coil tube 24 is sleeved on the surface of the round tube of the housing 221. The coil tube 24 includes a pin. The pin is inserted into the inside of the connector cover 222. The front of the pin has two prongs for connecting to an external power supply line to generate electromagnetic force.

[0035] A movable iron core 27 is slidably connected inside the round tube at the top of the housing 221. The movable iron core 27 includes a core body 271, the surface of which is slidably connected to the round tube of the housing 221. It is used to open and close the valve under the action of electromagnetic force. A sealing head 28 is inserted into the bottom of the core body 271 through a cylindrical rod. A rotating scraper 272 is rotatably connected to the bottom of the sealing head 28. The rotating scraper 272 is rotatably connected to the cylindrical rod at the bottom of the core body 271. The rotating scraper 272 is located in the round hole at the bottom of the round blind hole of the valve body 11. The rotating scraper 272 is used to slide up and down in the round hole at the bottom of the blind hole of the valve body 11 under the action of the core body 271, thereby clearing the fire extinguishing medium stuck in the round hole and preventing the fire extinguishing medium from blocking the valve body 11. The top of the core body 271 is fixedly connected to the fixed iron core 26 through a spring. An O-ring seal is fitted between the core body 271 and the magnetic shielding collar 212.

[0036] A magnetic support 23 is fixedly connected to the bottom of the inner wall of the housing 221. The magnetic support 23 includes a main frame 231. The bottom of the main frame 231 is inserted into the round tube of the housing 221. There are two main frames 231, and the other one is located at the top inside the housing 221. They are symmetrically distributed inside the housing 221. A permanent magnet 232 is fixedly connected between the gaps on the left side of the main frame 231. The N pole of the permanent magnet 232 is located at the top and the S pole is located at the bottom. It is used to stabilize the position of the core 271 by magnetic force after the valve is opened.

[0037] The valve body 11 has a turbulence acceleration mechanism 3 connected to the front, which is connected to the blind hole on the right side of the valve body 11. The valve body 11 has a vibration unblocking mechanism 4 fixedly connected to the top.

[0038] In use, when a fire occurs in the area where the solenoid valve is located, the fire protection system transmits current to the solenoid valve through a wire, activating the control valve box 2, the turbulence acceleration mechanism 3, and the vibration unblocking mechanism 4. At this time, the coil tube 24 receives the current and generates an upward electromagnetic force. The electromagnetic force of the permanent magnet 232 is transmitted through the main frame 231 to the magnetic guide plate 25, and then to the fixed iron core 26. The coil tube 24, along with the permanent magnet 232 and the fixed iron core 26, attract the core body 271. Under the action of the electromagnetic force, the core body 271 moves upward, simultaneously compressing the spring until the top of the core body 271 is attracted to the bottom of the fixed iron core 26. The core body 271 then drives the seal... The head 28 moves upward, thereby releasing the closure of the movable iron core 27 and the blind hole at the top of the valve body 11 by the sealing head 28. The extinguishing medium enters the device through the turbulence acceleration mechanism 3. Part of it enters other solenoid valves through the connection port 13, and the other part enters the blind hole on the right side of the valve body 11 through the circular through hole opened at the bottom of the sealing head 28. After the extinguishing medium enters the blind hole on the right side of the valve body 11, it pushes the one-way valve head 15 to slide along the inside of the lubricating copper sleeve 14 until the one-way valve head 15 leaks out of the through hole. The extinguishing medium enters the inside of the lubricating copper sleeve 14 through the through hole and flies out in a spray state through the nozzle 17, spraying onto the fire location to complete the fire extinguishing.

[0039] After adsorption is completed, the fire protection system stops supplying power to the coil tube 24. The core 271 remains in the open position under the magnetic attraction of the permanent magnet 232. At the same time, the fire extinguishing medium entering the valve body 11 pushes the sealing head 28 upward, thereby lifting the core 271 and further stabilizing the opening of the core 271. When the fire extinguishing is completed and the spraying mechanism needs to be closed, the fire protection system sends a reverse current to the coil tube 24 through the wire, and at the same time closes the turbulence acceleration mechanism 3 and the vibration unblocking mechanism 4. The coil tube 24 generates a reverse electromagnetic force acting on the core 271. Under the action of the electromagnetic force, the core 271 is detached from the fixed iron core 26 and re-adsorbed. The sealing head 28 re-seals the circular blind hole inside the valve body 11, thereby achieving valve closure.

[0040] During the opening process of the core 271, the movable iron core 27 slides upward under the action of electromagnetic force. During the closing process of the core 271, the movable iron core 27 slides downward under the action of electromagnetic force. During the upward or downward sliding of the movable iron core 27, the rotating scraper 272, driven by the core 271, vertically scrapes the inner wall of the circular hole at the bottom of the blind hole of the valve body 11 where the rotating scraper 272 is located, removing the extinguishing medium or other impurities that may adhere to the inside of the hole. At the same time, it clears the extinguishing medium stagnating in the circular hole and prevents the extinguishing medium from clogging the valve body 11. During the process of the extinguishing medium entering the valve body 11, the extinguishing medium flows through the blades of the rotating scraper 272. The flowing extinguishing medium drives the rotating scraper 272 to rotate, thereby allowing the rotating scraper 272 to scrape and clean the extinguishing medium adhering to the inner wall of the circular hole in the horizontal direction.

[0041] Example 2: Please refer to Figure 1-12 Based on Embodiment 1, the present invention provides a technical solution: the turbulence acceleration mechanism 3 includes:

[0042] A front acceleration pipe 31 is connected to the right side of the main pipe 32. The front acceleration pipe 31 includes a front pipe body 311, the left side of which is connected to the right side of the pipe body 321. Its inner wall is converging cone-shaped along the medium flow direction, and the outlet diameter is 20%–25% smaller than the inlet diameter, forming a Venturi effect to convert static pressure into dynamic pressure. Four front baffles 312 are fixedly connected inside the front pipe body 311 and are evenly distributed about the central axis of the front pipe body 311 to accelerate the flow of the extinguishing medium entering the valve.

[0043] The main tube 32 is connected to the front of the rear acceleration tube 34 via its back side, and is used to restrict the flow direction of the extinguishing medium. The main tube 32 includes a tube body 321, the inner diameter of which is flush with the outlet of the front tube body 311 to ensure that the high flow velocity obtained after pressure drop is maintained. The back side of the tube body 321 is connected to the front of the rear tube body 341, and a cross bracket 322 is fixedly connected to the back side of the tube body 321. The front of the cross bracket 322 has a circular through hole, which is used to restrict the position of the eccentric blade 33.

[0044] An eccentric blade 33 is fixedly connected to the front of the main tube 32 and is used to stir and disperse the extinguishing medium to prevent clogging. The eccentric blade 33 includes a power motor 331, which is fixedly connected to the front of the tube body 321 to provide power. The power motor 331 is electrically connected to an external power supply line through a wire. A metal round rod is fixedly connected to the back of the power motor 331 through a motor shaft. A long curved blade 332 is fixedly connected to the back of the power motor 331 through the metal round rod. The long curved blade 332 is located at the top of the metal round rod. A short curved blade 333 is fixedly connected to the back of the power motor 331 through the metal round rod. The front cross sections of the long curved blade 332 and the short curved blade 333 are both curved surfaces. The distance from the end point of the long curved blade 332 to the metal round rod is greater than the distance from the end point of the short curved blade 333 to the metal round rod, which is used to achieve eccentric rotation and generate vibration during rotation. The back of the metal round rod is rotatably connected to the circular through hole of the cross bracket 322. Specifically, the eccentric blade 33 is driven by the power motor 331, which generates pulsating vortices in the range of 8000–10000 rpm. The long and short curved blades 332 and 333 alternately sweep across the transmission medium under the eccentric trajectory, realizing blade vortex shearing, destroying the agglomeration of the aerosol medium during the transmission process, and further reducing the apparent viscosity of the medium.

[0045] The rear acceleration pipe 34, with its back end connected to the front end of the valve body 11, is used to accelerate the fire extinguishing medium fluid as it enters the valve body 1. The rear acceleration pipe 34 includes a rear pipe body 341, the back end of which is connected to a circular blind hole at the top of the valve body 11 for the entry of the fire extinguishing medium. A rear baffle 342 is fixedly connected inside the rear pipe body 341 to further accelerate the fire extinguishing medium. The inner wall of the rear pipe body 341 adopts a convergence-diffusion combination structure: the first two-thirds of the inner wall of the rear pipe body 341 converges (convergence angle 5°±0.5°) towards the main pipe 32 until the minimum throat diameter, while the last one-third of the inner wall diffuses slightly (angle ≤4°). The acceleration of the medium by the rear acceleration pipe 34 increases the flow velocity of the medium entering the valve body 11, ensuring that the fire extinguishing medium enters the valve body 11 with high kinetic energy, reducing the probability of blockage. Simultaneously, some static pressure is recovered in the diffusion section, reducing overall pressure loss. There are four rear spoilers 342, which are evenly distributed in the converging section about the central axis of the rear tube 341 inside the rear tube 341.

[0046] When in use, after the valve is started, the power motor 331 starts, which drives the long curved blade 332 and the short curved blade 333 to rotate, and at the same time generates vibration. The extinguishing medium enters the main pipe 32 through the front pipe body 311. During the process of entering the front acceleration pipe 31, the extinguishing medium is accelerated by the reaction force of the front pipe body 311 and enters the main pipe 32 at a high speed. The extinguishing medium entering the main pipe 32 is dispersed by the long curved blade 332 and the short curved blade 333, thereby preventing the extinguishing medium from agglomerating and causing blockage. The dispersed extinguishing medium enters the rear pipe body 341, and after being accelerated by the rear baffle 342, it enters the valve body 11 at a high speed.

[0047] During the dispersing process, the vibration generated by the rotation of the eccentric blade 33 is transmitted to the extinguishing medium in contact with it, promoting the loosening of the extinguishing medium. At the same time, the vibration is transmitted to the surface of the tube body 321 through the metal rod, promoting the loosening of the extinguishing medium adhering to the inner surface of the tube body 321.

[0048] Example 3: Please refer to Figure 1-14 Based on Embodiment 1 and Embodiment 2, the present invention provides a technical solution: the vibration unblocking mechanism 4 includes a motor bracket 41, which is fixedly connected to the top of the valve body 11 and located on the right side of the valve box 2. A vibration motor 42 is fixedly connected to the top of the motor bracket 41. The vibration motor 42 is electrically connected to an external power supply line through a wire. An eccentric trigger wheel 43 is fixedly connected to the left side of the vibration motor 42 through a motor shaft. An impact rod 44 is slidably connected inside the circular blind hole at the top of the lubricating copper sleeve 14, which is used to impact the lubricating copper sleeve 14 under the squeezing action of the eccentric trigger wheel 43 to generate vibration.

[0049] The impact rod 44 is located at the bottom of the eccentric trigger wheel 43. The impact rod 44 includes a rod body 441. A contact plate 442 is fixedly connected to the top of the rod body 441 for contacting the eccentric trigger wheel 43. The top of the contact plate 442 is covered with a rubber layer to reduce wear. A limit plate 443 is fixedly connected to the surface of the rod body 441. The limit plate 443 is located at the bottom of the contact plate 442. The bottom of the limit plate 443 is fixedly connected to the valve body 11 by a spring. A rubber impact head 444 is fixedly connected to the bottom of the rod body 441. The surface of the rubber impact head 444 is covered with a rubber layer for impacting the lubricating copper sleeve 14 and generating vibration under the action of the rod body 441.

[0050] When in use, after the valve is opened, the vibration motor 42 starts under the control of the fire protection system. The vibration motor 42 drives the eccentric trigger wheel 43 to rotate. After the eccentric trigger wheel 43 rotates, it periodically squeezes the contact plate 442. After the contact plate 442 is squeezed, it drives the rod 441, the limit plate 443, and the rubber impact head 444 to move downward, while squeezing the spring. The rubber impact head 444 vibrates after colliding with the lubricating copper sleeve 14, which promotes the detachment of the fire extinguishing medium adhering to the inner wall of the lubricating copper sleeve 14. The vibration is transmitted to the one-way valve head 15, which promotes the loosening of the one-way valve head 15 and the lubricating copper sleeve 14. The vibration promotes the loosening of the fire extinguishing medium inside.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A bistable, self-holding fire-fighting solenoid valve, comprising a valve body (1), characterized in that: The valve body (1) includes a valve body (11), a circular blind hole is provided on the right side of the valve body (11), a valve box (2) is connected to the top of the valve body (11), the bottom of the valve box (2) is connected to the blind hole on the right side of the valve body (11), a turbulence acceleration mechanism (3) is connected to the front of the valve body (11), the turbulence acceleration mechanism (3) is connected to the blind hole on the right side of the valve body (11), and a vibration unblocking mechanism (4) is fixedly connected to the top of the valve body (11). The turbulence acceleration mechanism (3) includes: The rear acceleration tube (34) is connected to the front of the valve body (11) on the back side, and is used to accelerate the fire extinguishing medium fluid when it enters the valve body (1). The main tube (32) is connected to the front of the rear acceleration tube (34) on the back side, which is used to restrict the flow direction of the extinguishing medium; Eccentric blade (33), the eccentric blade (33) is fixedly connected to the front of the main tube (32) and is used to stir and disperse the extinguishing medium to prevent the extinguishing medium from clogging; The valve body (11) has a circular blind hole at the top and a circular hole at the bottom of the circular blind hole that communicates with the blind hole on the right side of the valve body (11). The circular hole is located to the left of the blind hole on the right side of the valve body (11). A cover plate (12) is fixedly connected to the right side of the valve body (11) by bolts. A parallel connection port (13) is connected to the back of the valve body (11). The parallel connection port (13) communicates with the circular blind hole at the top of the valve body (11). A lubricating copper sleeve (14) is fixedly connected inside the blind hole on the right side of the valve body (11). Graphite material is embedded on the inner surface of the lubricating copper sleeve (14). A one-way valve head (15) is slidably connected inside the lubricating copper sleeve (14). A nozzle (17) is fixedly connected inside the blind hole on the right side of the valve body (11). There are two circular blind holes at the top of the valve body (11), and the other one is located at the top of the lubricating copper sleeve (14). The valve box (2) includes a magnetic shielding tube seat (21) to prevent the magnetic shielding tube seat (21) from being completely attracted to the iron core and affecting the movement of the iron core. The magnetic shielding tube seat (21) includes a magnetic shielding tube body (211). The bottom of the magnetic shielding tube body (211) is connected to the blind hole at the top of the valve body (11). A round tube is fixedly connected to the top of the magnetic shielding tube body (211). A valve shell (22) is fixedly connected to the top of the magnetic shielding tube body (211). A magnetic shielding collar (212) is fixedly connected to the bottom of the magnetic shielding tube body (211). The valve shell (22) includes a housing (221). The bottom of the housing (221) is fixedly connected to the top of the magnetic shielding tube body (211). The housing (221) includes a shell (221). The bottom of the shell (221) is fixedly connected to the top of the magnetic shielding tube body (211). 1) The bottom is sleeved with the top round tube of the magnetic shielding tube body (211). The front of the shell (221) is connected to the connector cover (222). The top of the round tube of the shell (221) is fixedly connected to the fixed iron core (26). The top of the fixed iron core (26) is fixedly connected to the magnetic plate (25) by screws, which is used to transmit magnetism to the fixed iron core (26). The magnetic plate (25) is inserted into the top of the shell (221). The surface of the round tube of the shell (221) is sleeved with a coil tube (24). The coil tube (24) includes a pin. The pin is inserted into the inside of the connector cover (222). The front of the pin is connected to two pins, which are used to connect with the external power supply line to generate electromagnetic force. The top circular tube of the housing (221) is slidably connected to a movable iron core (27). The movable iron core (27) includes a core body (271). The surface of the core body (271) is slidably connected to a magnetic shielding collar (212). The surface of the core body (271) is slidably connected to the circular tube of the housing (221) and is used to open and close the valve under the action of electromagnetic force.

2. The bistable self-holding fire-fighting solenoid valve according to claim 1, characterized in that: The lubricating copper sleeve (14) is made of copper.

3. A bistable self-holding fire-fighting solenoid valve according to claim 2, characterized in that: An O-ring is fitted between the bottom of the magnetic shielding tube (211) and the blind hole at the top of the valve body (11).

4. A bistable self-holding fire-fighting solenoid valve according to claim 3, characterized in that: The bottom of the core (271) is connected to a sealing head (28) via a cylindrical rod. The bottom of the sealing head (28) is rotatably connected to a rotating scraper (272). The rotating scraper (272) is rotatably connected to the cylindrical rod at the bottom of the core (271). The rotating scraper (272) is located in the circular hole at the bottom of the circular blind hole of the valve body (11). The rotating scraper (272) is used to clear the circular hole and prevent blockage under the action of the core (271). The top of the core (271) is fixedly connected to the fixed iron core (26) via a spring. An O-ring is fitted between the core (271) and the magnetic shielding collar (212).

5. A bistable self-holding fire-fighting solenoid valve according to claim 4, characterized in that: A magnetic support (23) is fixedly connected to the bottom of the inner wall of the housing (221). The magnetic support (23) includes a main frame (231). The bottom of the main frame (231) is inserted into the round tube of the housing (221). There are two main frames (231), and the other one is located at the top inside the housing (221) and is symmetrically distributed inside the housing (221). A permanent magnet (232) is fixedly connected between the left gaps of the main frame (231). The N pole of the permanent magnet (232) is located at the top and the S pole is located at the bottom, which is used to stabilize the position of the core (271) by magnetic force after the valve is opened.

6. A bistable self-holding fire-fighting solenoid valve according to claim 3, characterized in that: The rear acceleration tube (34) includes a rear tube body (341), the back of which is connected to a circular blind hole at the top of the valve body (11) for the entry of the extinguishing medium. A rear baffle (342) is fixedly connected inside the rear tube body (341) for accelerating the extinguishing medium. There are four rear baffles (342) and they are evenly distributed inside the rear tube body (341) about the central axis of the rear tube body (341). The main tube (32) includes a tube body (321), the back of which is connected to the front of the rear tube body (341). The back of the tube body (321) is fixedly connected to the front of the rear tube body (341). A cross bracket (322) is fixedly connected to the valve. The cross bracket (322) has a circular through hole on its front side to limit the position of the eccentric blade (33). The right side of the main tube (32) is connected to a front acceleration tube (31). The front acceleration tube (31) includes a front tube body (311). The left side of the front tube body (311) is connected to the right side of the tube body (321). A front spoiler (312) is fixedly connected inside the front tube body (311). There are four front spoilers (312) and they are evenly distributed about the central axis of the front tube body (311) to accelerate the fire extinguishing medium entering the valve.

7. A bistable self-holding fire-fighting solenoid valve according to claim 6, characterized in that: The eccentric blade (33) includes a power motor (331), which is fixedly connected to the front of the tube body (321) to provide power. The power motor (331) is electrically connected to an external power supply line through a wire. A metal rod is fixedly connected to the back of the power motor (331) through a motor shaft. A long curved blade (332) is fixedly connected to the back of the power motor (331) through the metal rod. The long curved blade (332) is located at the top of the metal rod. A short curved blade (333) is fixedly connected to the back of the power motor (331) through the metal rod. The front cross section of the long curved blade (332) and the short curved blade (333) are both curved. The distance from the end point of the long curved blade (332) to the metal rod is greater than the distance from the end point of the short curved blade (333) to the metal rod, which is used to achieve eccentricity and generate vibration during rotation. The back of the metal rod is rotatably connected to the circular through hole of the cross bracket (322).

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