Electromagnetic drive for a cabinet extinguishing device

Abstract

The application belongs to the technical field of fire-fighting equipment, and particularly relates to an electromagnetic driving device of a cabinet type fire extinguishing device, which comprises a cabinet body, a gas cylinder arranged in the cabinet body, an electromagnetic valve body mounted on the top of the gas cylinder, a discharge switch connected to one side of the electromagnetic valve body, a coil connected to the inner wall of the electromagnetic valve body, the discharge switch being electrically connected to the coil, and a movable iron core arranged in the coil. The electromagnetic driving device of the cabinet type fire extinguishing device can effectively reduce the working temperature of the electromagnetic coil through auxiliary heat dissipation, reduce the resistance increase caused by overheating, thereby stabilizing the electromagnetic force generated when the current flows through the coil, reducing the driving force fluctuation caused by temperature change, improving the action consistency of the electromagnetic valve, and ensuring the coil to work at a lower temperature through auxiliary heat dissipation, avoiding the adverse effects of overheating on the coil performance, enabling the valve core to move faster, and thereby improving the response speed.

Description

Technical Field

[0001] This invention belongs to the field of fire protection equipment technology, and specifically relates to an electromagnetic drive device for a cabinet-type fire extinguishing device. Background Technology

[0002] Cabinet-type fire extinguishing systems are commonly used fire protection equipment in industrial and civil buildings. Their design purpose is to quickly and effectively extinguish fires in the event of a fire, achieving early fire control and suppression, and protecting personnel and property safety. The drive mechanism, as a key component of the cabinet-type fire extinguishing system, directly determines the system's activation response speed and operational reliability.

[0003] Currently, the main drive methods for existing cabinet-type fire extinguishing devices include mechanical drive, pneumatic drive, and electromagnetic drive. Among them, mechanical drive devices have complex structures, transmission components are prone to wear, and jamming is likely to occur after long-term use, resulting in delayed start-up and failing to meet the needs of rapid fire extinguishing in the early stages of a fire. Pneumatic drive devices require high-pressure gas cylinders, which not only increases the overall size and weight of the device but also poses safety hazards such as gas cylinder leakage and insufficient pressure, resulting in high maintenance costs. Electromagnetic drive devices, with their advantages of simple structure, fast response speed, and high control precision, are gradually becoming the mainstream drive method for cabinet-type fire extinguishing devices.

[0004] However, existing electromagnetic drive devices still have some shortcomings: on the one hand, the driving force output of the electromagnetic drive mechanism is unstable. Under different ambient temperatures, the electromagnetic attraction of the electromagnetic coil is prone to fluctuation, resulting in poor consistency of the fire extinguishing device's activation action; on the other hand, the instantaneous response speed of the electromagnetic valve is limited. Since the electromagnetic coil needs a large instantaneous current to excite the magnetic field when it is activated, the power supply capacity of a single power source is difficult to meet the demand for the large instantaneous current, resulting in a delay in the valve core's action, which further affects the fire extinguishing response efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide an electromagnetic drive device for a cabinet-type fire extinguishing device, which can effectively reduce the operating temperature of the electromagnetic coil through auxiliary heat dissipation, reduce the increase in resistance caused by overheating, thereby stabilizing the electromagnetic force generated when the current flows through the coil, and reducing the fluctuation of driving force caused by temperature changes, improving the consistency of the solenoid valve's operation. At the same time, auxiliary heat dissipation can ensure that the coil operates at a lower temperature, avoiding the adverse effects of overheating on the coil performance, allowing the valve core to move faster, thereby improving the response speed.

[0006] The specific technical solution adopted by this invention is as follows: An electromagnetic drive device for a cabinet-type fire extinguishing system includes a cabinet. A gas cylinder is housed inside the cabinet. An electromagnetic valve body is mounted on the top of the gas cylinder. A discharge switch is connected to one side of the electromagnetic valve body. A coil is connected to the inner wall of the electromagnetic valve body. The discharge switch is electrically connected to the coil. A movable iron core is movably disposed inside the coil. A movable rod is connected to the bottom of the movable iron core. A spike is connected to the bottom of the movable rod. A return spring is sleeved on the surface of the spike. The top of the return spring abuts against the bottom of the movable rod. The bottom end of the return spring is connected to the inner wall of the electromagnetic valve body. The cabinet... The internal structure includes a power supply and energy storage structure; the solenoid valve body has an internal cavity with an auxiliary heat dissipation structure; the power supply and energy storage structure includes a battery and a capacitor bank connected to the inner wall of the cabinet, the battery supplying power to the capacitor bank, and the capacitor bank providing instantaneous power to the coil through a discharge switch; the auxiliary heat dissipation structure includes a heat-conducting coil connected to the inner wall of the cavity, the height of the heat-conducting coil being adapted to the coil, and a heat sink connected to the outer surface of the heat-conducting coil; several heat dissipation vents are provided on the top of the surface of the solenoid valve body, and are equidistantly distributed on the outer surface of the solenoid valve body.

[0007] Preferably, the battery is connected to a charging management module, and the charging management module is powered by external AC power. The charging management module is used to charge the battery.

[0008] Preferably, the coil adopts a disc-type design and is made of pure copper. A central hole is provided at the center of the coil, and the moving iron core is slidably connected inside the central hole.

[0009] Preferably, a diode is provided between the capacitor bank and the discharge switch. The diode is a unidirectional diode, and the diode current flows from the capacitor bank to the discharge switch.

[0010] Preferably, the solenoid valve body has a groove inside, a guide sleeve is connected inside the groove, and the moving rod is slidably connected inside the guide sleeve.

[0011] Preferably, the bottom of the moving iron core is provided with a through hole, which extends to the top of the moving iron core. There are several through holes, which are distributed in a ring inside the moving iron core.

[0012] Preferably, the return spring is made of stainless steel and has an anti-corrosion coating on its surface.

[0013] Preferably, the inner wall of the cabinet is connected to an outer frame, the battery is installed inside the outer frame, and the capacitor bank and diodes are installed outside the outer frame.

[0014] Preferably, a dust cover is connected to the outer side of the outer frame, and the capacitor bank and diode are disposed inside the dust cover.

[0015] Preferably, the moving rod is made of aluminum alloy or a lightweight composite material, and the surface of the moving rod is provided with a wear-resistant layer.

[0016] The technical effects achieved by this invention are as follows: In this invention, the power supply and energy storage structure combines normal standby with instantaneous high current release. The battery provides long-term stable monitoring power, while the capacitor bank can release huge electrical energy the instantaneously upon receiving the start signal, ensuring that the solenoid valve body receives sufficient starting current, improving the start-up speed of the fire extinguishing device, and ensuring rapid release of extinguishing agent in emergency situations. This greatly enhances the action response of the solenoid valve body in emergency fire extinguishing situations. At the same time, with the cooperation of the auxiliary heat dissipation mechanism, the Joule heat generated by the coil inside the solenoid valve body during operation is efficiently discharged and dissipated to the external environment, avoiding a significant impact of temperature changes on electromagnetic attraction and ensuring the consistency of the solenoid valve body's start-up action.

[0017] In this invention, the rechargeable battery design enables the solenoid valve body and other key components to continue providing power in the event of a fire and power outage, ensuring that the fire extinguishing device can still function normally in emergencies and achieve rapid response. Furthermore, the charging management module inside the battery can protect the battery from overcharging and over-discharging, preventing damage to the battery. The unidirectional conduction diode prevents the capacitor bank from being damaged by reverse electromotive force, effectively protecting other components of the circuit and increasing the overall stability and safety of the solenoid valve body during operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the connection between the solenoid valve body and the gas cylinder of the present invention; Figure 3 This is a three-dimensional schematic diagram of the power supply and energy storage structure of the present invention; Figure 4 This is a three-dimensional sectional view of the front section of the solenoid valve body of the present invention; Figure 5 This is a three-dimensional schematic diagram of the coil and moving iron core of the present invention disassembled; Figure 6 This is a three-dimensional schematic diagram showing the heat-conducting coil and heat sink of the present invention separated; Figure 7 This is a schematic diagram illustrating the working principle of the driving device of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: 1. Cabinet; 101. Gas cylinder; 2. Solenoid valve body; 201. Discharge switch; 202. Coil; 203. Moving iron core; 204. Moving rod; 205. Spike rod; 206. Return spring; 3. Cavity; 301. Heat conducting coil; 302. Heat sink; 303. Heat dissipation port; 401. Battery; 402. Capacitor group; 5. Center hole; 6. Diode; 701. Slide groove; 702. Guide sleeve; 8. Through hole; 9. Outer frame; 10. Dust cover. Detailed Implementation

[0020] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0021] like Figures 1-7 As shown, an electromagnetic drive device for a cabinet-type fire extinguishing device includes a cabinet 1. A gas cylinder 101 is housed inside the cabinet 1. An electromagnetic valve body 2 is mounted on the top of the gas cylinder 101. A discharge switch 201 is connected to one side of the electromagnetic valve body 2. A coil 202 is connected to the inner wall of the electromagnetic valve body 2. The discharge switch 201 is electrically connected to the coil 202. A movable iron core 203 is movably disposed inside the coil 202. A movable rod 204 is connected to the bottom of the movable iron core 203. A spike 205 is connected to the bottom of the movable rod 204. A return spring 206 is sleeved on the surface of the spike 205. The top of the return spring 206 abuts against the bottom of the movable rod 204, and the bottom end of the return spring 206 is connected to the inner wall of the electromagnetic valve body 2. A power supply and energy storage structure is provided inside the cabinet 1. A cavity 3 is opened inside the electromagnetic valve body 2, and an auxiliary heat dissipation structure is provided inside the cavity 3. The energy storage structure includes a battery 401 and a capacitor bank 402 connected to the inner wall of the cabinet 1. The battery 401 supplies power to the capacitor bank 402, and the capacitor bank 402 provides instantaneous power to the coil 202 through the discharge switch 201. With the cooperation of the solenoid valve body 2 and the power supply and energy storage structure, it can ensure that in the event of a fire, power outage, or emergency, the fire extinguishing system can still quickly activate the solenoid valve body 2, rapidly release the extinguishing agent, and achieve efficient fire extinguishing. Secondly, the presence of the capacitor bank 402 can provide instantaneous high current support for the solenoid valve body 2, ensuring that the solenoid valve body 2 can respond quickly when the instantaneous current demand is high, reducing the working delay of the solenoid valve body 2. The design with a return spring 206 ensures that the solenoid valve body 2 can quickly reset after stopping work, avoiding failures caused by prolonged inactivity and improving the reliability and continuity of the solenoid valve body 2.

[0022] like Figure 4 and Figure 6As shown, the auxiliary heat dissipation structure includes a heat-conducting coil 301 connected to the inner wall of the cavity 3. The height of the heat-conducting coil 301 is adapted to the coil 202. A heat sink 302 is connected to the outer surface of the heat-conducting coil 301. Several heat dissipation ports 303 are opened on the top of the surface of the solenoid valve body 2 and are evenly distributed on the outer surface of the solenoid valve body 2. The heat-conducting coil 301 connected to the inner wall of the cavity 3 can effectively conduct the heat generated by the coil 202 to the heat sink 302. The heat sink 302 increases the heat dissipation area of ​​the solenoid valve body 2 and the internal coil 202. The design of the heat dissipation ports 303 allows hot air to be quickly discharged from the solenoid valve body 2, further improving the heat dissipation efficiency, reducing the temperature generated by the internal coil 202 during operation, preventing overheating, and thus reducing the resistance of the coil 202, improving the energy conversion efficiency, and ensuring that the solenoid valve body 2 responds to signals and performs actions quickly and accurately.

[0023] like Figure 1 and Figure 3 As shown, the battery 401 is connected to a charging management module, which is powered by external AC mains. The charging management module is used to charge the battery 401, and the charging management module and the battery 401 are integrated into a single design, which reduces the space occupied by the battery. The charging management module can monitor the voltage and current of the battery 401, realize overcharge protection, and prevent safety hazards such as thermal runaway or explosion caused by overcharging. This protects the battery 401 and the connected electronic components. At the same time, the rechargeable battery 401 can ensure that it is automatically replenished with power after the AC mains power is restored or the fault is recovered, thus realizing uninterrupted power supply.

[0024] like Figure 4 and Figure 5 As shown, the coil 202 adopts a disc-type design and is made of pure copper. A central hole 5 is opened in the center of the disc-type coil 202, and the moving iron core 203 is slidably connected inside the central hole 5. The pure copper material has extremely high conductivity and extremely low resistivity, which can effectively reduce energy loss when current passes through, improve the working efficiency of the coil 202, and ensure the response speed and performance of the solenoid valve body 2. In addition, the design of the disc-type coil 202 can increase the surface area, which helps heat dissipation. Good heat dissipation performance can prevent the coil 202 from overheating, thereby improving the stability of the solenoid valve body 2. The moving iron core 203 is slidably connected inside the central hole 5, allowing it to move flexibly when the current changes, enabling it to quickly respond to control signals and improve the dynamic performance and response speed of the solenoid valve.

[0025] like Figure 2As shown, a diode 6 is provided between the capacitor bank 402 and the discharge switch 201. The diode 6 is a unidirectional diode, and the current flows from the capacitor bank 402 to the discharge switch 201. When the solenoid valve body 2 is closed, reverse current is easily generated. The diode 6 can prevent this current from damaging the circuit or the capacitor bank 402. At the same time, the fast switching characteristic of the diode 6 can improve the response speed of the solenoid valve body 2, reduce the delay time, and ensure that the fire extinguishing device can react quickly.

[0026] like Figure 4 and Figure 5 As shown, the solenoid valve body 2 has a sliding groove 701 inside, and a guide sleeve 702 is connected inside the sliding groove 701. The moving rod 204 is slidably connected inside the guide sleeve 702. The guide sleeve 702 provides a precise guiding path to ensure that the moving rod 204 maintains a stable direction when sliding, reducing the offset or shaking of the moving rod 204. This allows the moving rod 204 to push the needle to pierce the sealing film of the gas cylinder 101 vertically and accurately. Moreover, the design of the guide sleeve 702 can greatly reduce the sliding resistance of the moving rod 204, enabling the solenoid valve body 2 to achieve a fast response with lower energy consumption and better improve the response speed of the solenoid valve body 2.

[0027] like Figure 5 As shown, a through hole 8 is provided at the bottom of the moving iron core 203, extending to the top of the moving iron core 203. There are several through holes 8, which are distributed in a ring inside the moving iron core 203. The through holes 8 not only reduce the overall material usage of the moving iron core 203, but also allow gas to pass through the through holes 8 when the moving iron core 203 moves, forming an exhaust channel. This ensures that the movement of the moving iron core 203 is almost only affected by electromagnetic force and mechanical friction, making the movement process decisive and smooth, reducing the resistance generated when the moving iron core 203 moves, improving the movement efficiency, and enabling it to respond more quickly.

[0028] like Figure 4 and Figure 5 As shown, the return spring 206 is made of stainless steel and has an anti-corrosion coating on its surface. Stainless steel generally has high strength and elasticity, and can maintain good shape recovery ability under repeated compression and tension, thereby increasing the fatigue life of the return spring 206 under repeated compression and ensuring long-term stability and safety.

[0029] like Figure 3As shown, the inner wall of the cabinet 1 is connected to the outer frame 9. The battery 401 is installed inside the outer frame 9, and the capacitor bank 402 and diode 6 are installed on the outside of the outer frame 9. By installing the battery 401 inside the outer frame 9, the battery 401 can be physically protected by the outer frame 9, which can resist the influence of external impacts, dust and moisture and other environmental factors, thus improving the overall protection capability. When it is necessary to inspect, test or replace the capacitor bank 402 and diode 6, technicians can operate directly on the outside of the outer frame 9 without touching or disassembling the internal electronic components and their complex wiring, which greatly simplifies the maintenance process and reduces the risk of misoperation.

[0030] like Figure 1 and Figure 3 As shown, a dust cover 10 is connected to the outside of the outer frame 9, and the capacitor group 402 and diode 6 are located inside the dust cover 10. The use of the dust cover 10 can reduce the influence of external factors on the capacitor group 402 and diode 6, thereby reducing the failure rate, extending the service life of these electronic components, and improving the reliability of the system.

[0031] like Figure 4 and Figure 5 As shown, the moving rod 204 is made of aluminum alloy or composite lightweight material. The surface of the moving rod 204 is provided with a wear-resistant layer. Aluminum alloy and composite material have good lightweight properties, which can effectively reduce the weight of the moving rod 204 and help improve the response speed of the solenoid valve body 2. Aluminum alloy and composite material usually have high strength and rigidity, which can withstand large loads and impacts, ensuring the stability and reliability of the moving rod 204 during operation and reducing the risk of deformation and damage.

[0032] The working principle of this invention is as follows: The battery 401 inside the cabinet 1 provides continuous standby power to the control circuit of the entire electromagnetic drive device through the discharge switch 201. The capacitor bank 402 is fully charged by the battery 401 through the charging circuit and is in an energy storage ready state. When the solenoid valve body 2 is not energized, the reset spring 206 is in a natural state, and its upward elastic force acts on the moving iron core 203 through the moving rod 204, keeping the moving iron core 203 and the connected spike 205 in a raised state. When a start signal is sent to the solenoid valve body 2, the discharge switch 201 connects the drive circuit of the solenoid valve body 2. The drive circuit guides the instantaneous release of the electrical energy stored in the capacitor bank 402. The diode 6 ensures that the current flows unidirectionally from the capacitor bank 402 to the coil 202 of the solenoid valve body 2, preventing reverse impact. The cooperation between the capacitor bank 402 and the battery 401 can supplement the voltage output of the discharge switch 201 to the solenoid valve body 2, improving the voltage output. A large current with instantaneous output capability flows through the disc coil 202, generating a strong magnetic field at the center of the coil 202. This magnetic field acts on the moving iron core 203, which slides in the center hole 5 of the coil 202, generating a strong downward electromagnetic attraction. The electromagnetic force overcomes the elasticity of the return spring 206 and the system friction, quickly pulling the moving iron core 203 downward. The moving iron core 203 drives the spike 205 through the moving rod 204 to impact downward with great speed and force, piercing the sealing diaphragm or valve of the fire extinguishing agent cylinder 101. After the cylinder 101 is pierced, the gas is instantly ejected through the opened channel to extinguish the fire. During the operation of the solenoid valve body 2, the heat generated by the coil 202 is efficiently conducted to the heat sink 302 through the heat conduction coil 301, and then convected with the air inside the cabinet 1 through the heat dissipation port 303 on the solenoid valve body 2, preventing the coil 202 from overheating and being damaged, and ensuring the reliability and lifespan of the solenoid valve body 2.

[0033] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. An electromagnetic drive device for a cabinet-type fire extinguishing system, characterized in that: The system includes a cabinet (1), inside which a gas cylinder (101) is installed. A solenoid valve body (2) is installed on the top of the gas cylinder (101). A discharge switch (201) is connected to one side of the solenoid valve body (2). A coil (202) is connected to the inner wall of the solenoid valve body (2). The discharge switch (201) is electrically connected to the coil (202). A movable iron core (203) is movably installed inside the coil (202). A moving rod is connected to the bottom of the movable iron core (203). (204), the bottom of the moving rod (204) is connected to a spike (205), and a return spring (206) is sleeved on the surface of the spike (205). The top of the return spring (206) abuts against the bottom of the moving rod (204), and the bottom of the return spring (206) is connected to the inner wall of the solenoid valve body (2). The cabinet (1) is provided with a power supply and energy storage structure. The solenoid valve body (2) is provided with a cavity (3), and the cavity (3) is provided with an auxiliary heat dissipation structure. The power supply and energy storage structure includes a battery (401) and a capacitor bank (402) connected to the inner wall of the cabinet (1). The battery (401) is used to supply power to the capacitor bank (402), and the capacitor bank (402) provides instantaneous power to the coil (202) through a discharge switch (201). The auxiliary heat dissipation structure includes a heat-conducting coil (301) connected to the inner wall of the cavity (3). The height of the heat-conducting coil (301) is adapted to the coil (202). A heat sink (302) is connected to the outer surface of the heat-conducting coil (301). Several heat dissipation ports (303) are opened on the top of the surface of the solenoid valve body (2) and are evenly distributed on the outer surface of the solenoid valve body (2).

2. The electromagnetic drive device of the cabinet-type fire extinguishing device according to claim 1, characterized in that: The battery (401) is connected to a charging management module, and the charging management module is powered by external AC power. The charging management module is used to charge the battery (401).

3. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 1, characterized in that: The coil (202) adopts a disc design and is made of pure copper. A central hole (5) is provided at the center of the coil (202), and the moving iron core (203) is slidably connected inside the central hole (5).

4. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 1, characterized in that: A diode (6) is provided between the capacitor bank (402) and the discharge switch (201). The diode (6) is a unidirectional conducting diode, and the current flows from the capacitor bank (402) to the discharge switch (201).

5. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 1, characterized in that: The solenoid valve body (2) has a groove (701) inside, and a guide sleeve (702) is connected inside the groove (701). The moving rod (204) is slidably connected inside the guide sleeve (702).

6. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 1, characterized in that: The bottom of the moving iron core (203) is provided with a through hole (8), which extends to the top of the moving iron core (203). There are several through holes (8), which are distributed in a ring inside the moving iron core (203).

7. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 1, characterized in that: The return spring (206) is made of stainless steel and has an anti-corrosion coating on its surface.

8. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 4, characterized in that: The inner wall of the cabinet (1) is connected to the outer frame (9), the battery (401) is installed inside the outer frame (9), and the capacitor group (402) and diode (6) are installed on the outside of the outer frame (9).

9. The electromagnetic drive device for a cabinet-type fire extinguishing device according to claim 8, characterized in that: A dust cover (10) is connected to the outside of the outer frame (9), and the capacitor group (402) and diode (6) are disposed inside the dust cover (10).

10. The electromagnetic drive device of the cabinet-type fire extinguishing device according to claim 5, characterized in that: The moving rod (204) is made of aluminum alloy or composite lightweight material, and the surface of the moving rod (204) is provided with a wear-resistant layer.

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