Fireproof metering box with heat dissipation structure

Abstract

The present application relates to the technical field of electric energy metering box, and particularly relates to a fireproof metering box with a heat dissipation structure, which comprises a box body, ventilating openings are formed on both sides of the box body, and adjusting vanes are installed on the ventilating openings; guide rods are fixed on both sides of the ventilating openings, respectively, and the guide rods are extended and lengthened towards both ends; an isolation plate is slidably sleeved on the guide rods, and a locking assembly is fixed on the isolation plate; a temperature sensing displacement assembly and a sliding rod are arranged on the top of the box body, the sliding rod is slidably penetrated through the side plates of the box body where the ventilating openings are located, the temperature sensing displacement assembly is fixedly installed on the top of the box body, and the moving output end of the temperature sensing displacement assembly is fixedly connected with the sliding rod; a box body is fixed on one side of the box body, one end of the sliding rod is extended into the box body, a fire extinguishing assembly is arranged in the box body, and the extended end of the sliding rod is detachably connected with the fire extinguishing assembly; when the temperature in the box body rises due to fire, the temperature sensing displacement assembly is triggered to push the sliding rod, the sliding rod moves to make the isolation plate fall and block the ventilating openings, and the fire extinguishing assembly is triggered to spray fire extinguishing medium into the box body.

Description

Technical Field

[0001] This invention relates to the field of electricity metering box technology, and specifically to a fireproof metering box with a heat dissipation structure. Background Technology

[0002] A metering box is a specialized enclosure used to centrally install electrical energy metering equipment (such as electricity meters and transformers). Its core function is to achieve accurate metering and data management of electrical energy. During operation, it is necessary to maintain heat dissipation to prevent the equipment inside the box from overheating due to long-term operation, which could lead to inaccurate meter readings, aging of electronic components, or even burnout, thus ensuring metering accuracy and equipment lifespan. In the event of a fire, it is necessary to extinguish the fire promptly to prevent the spread of electric arcs, overheating, or external fire sources caused by electrical faults, and to prevent the enclosure materials from fueling combustion or the internal equipment from exploding, effectively reducing the risk of electrical fires and protecting personal and property safety.

[0003] Chinese patent document (publication number: CN120377080A) discloses a distribution box wiring protection device and fire protection method that facilitates later maintenance, relating to the field of distribution box technology. The device includes a distribution box body, a protective gate, a lifting assembly, and a fireproof bag assembly. A wiring board is installed inside the distribution box. Heat dissipation windows are provided on both side panels and the back panel of the distribution box body. The protective gate is movably mounted on the outside of the distribution box body. This distribution box wiring protection device can, in the event of a fire, immediately close the heat dissipation windows of the distribution box through the protective gate, while simultaneously using fireproof bags to isolate the burning components. Combined with a spray fire extinguisher, it can effectively extinguish the fire by sealing and burying the burning components, thereby improving the fire extinguishing success rate, shortening the fire start time, and reducing fire losses.

[0004] Existing fireproof metering boxes have the following technical problems:

[0005] 1. Most cooling systems lack effective airflow organization and control between the bidirectional fan and the vent, which can easily lead to airflow short-circuiting and low cooling efficiency.

[0006] 2. The temperature control system adopts a single threshold triggering method and lacks a temperature buffering mechanism. It is prone to false triggering when the metering equipment is operating under normal high load or when the ambient temperature fluctuates, resulting in unnecessary fire extinguishing actions.

[0007] 3. Fire extinguishing systems mostly rely on electronic control components. In the harsh environment of high temperature, dense smoke, electromagnetic interference and other conditions generated by a fire, electronic components are prone to performance degradation, poor contact and other failures, which may lead to system failure at critical moments.

[0008] 4. The lack of a phased switching control mechanism between fire extinguishing and heat dissipation functions makes it impossible to achieve an orderly switch between closed fire extinguishing, anti-reignition control, and ventilation according to the fire situation, which can easily lead to re-ignition or damage to metering equipment due to high temperature. Summary of the Invention

[0009] To address the shortcomings of existing technologies, this invention provides a fireproof metering box with a heat dissipation structure. By designing a double-rack linkage mechanism between the adjusting blades and the fan plate, the bidirectional reversible fan automatically closes when adjacent to the adjusting blades during operation, preventing airflow short-circuiting and ensuring forced convection covers the depth of the box, thus improving heat dissipation efficiency. Paraffin wax is used as a temperature-sensitive expansion medium, utilizing its unique "contraction followed by expansion" two-stage phase change characteristic to form a natural temperature buffer zone. During the initial melting stage at 65-70 degrees Celsius, volume contraction prevents false triggering; only when the temperature continues to rise to 75-85 degrees Celsius does significant expansion force drive the fire extinguishing mechanism. The system employs a purely mechanical triggering structure. The expansion of paraffin wax within the piston cylinder pushes a sliding rod, which, via a rack and pinion transmission system, drives the first and second rotating rods. These rods, along with mechanical components such as the first and second ratchet teeth and locking blocks, achieve phased control of the isolation plate. This relies entirely on physical force to avoid the risk of electronic component failure in harsh environments. A one-way bearing and an extended-path design for the second ratchet enable precise phased switching between fire extinguishing and heat dissipation functions. During a fire, the vents are sealed to extinguish the flames; as the temperature drops, the vents are delayed to prevent reignition; and finally, the ventilation function is activated for rapid heat dissipation and air exchange, ensuring the orderly and reliable switching of system states.

[0010] To achieve the above objectives, the present invention adopts the following technical solution:

[0011] A fireproof metering box with a heat dissipation structure includes a box body with vents on both sides. Each vent is equipped with an adjusting blade. Guide rods are fixed on both sides of each vent, extending to their respective ends. Isolation plates are slidably fitted onto the guide rods, and locking components are fixed on the isolation plates. A temperature-sensing displacement component and a sliding rod are installed at the top of the box body. The sliding rod slides through the side panels of the box body where the two vents are located. The temperature-sensing displacement component is fixedly installed at the top of the box body, and its movable output end is fixedly connected to the sliding rod. A rotating rod is movably inserted through the locking component, with one end of the rotating rod rotating. Installed on the base of the box, the other end of the rotating rod extends to the bottom of the sliding rod, and a first gear is installed at the end of the rotating rod. A first rack is fixed at the bottom end of the sliding rod near the first gear, and the first racks at both ends of the sliding rod mesh with the adjacent first gears respectively. A box is fixed on one side of the box, and one end of the sliding rod extends into the box. A fire extinguishing component is installed inside the box, and the extended end of the sliding rod is detachably connected to the fire extinguishing component. When a fire occurs inside the box and the temperature rises, the temperature-sensing displacement component is triggered to push the sliding rod. When the sliding rod moves, it causes the isolation plate to fall and block the vent, and at the same time, it triggers the fire extinguishing component to spray fire extinguishing medium into the box.

[0012] Preferably, two support rods are fixedly installed parallel to the slide rod at the inner top of the box body. The two ends of the support rods are fixedly connected to the side plates of the box body. The temperature-sensing displacement assembly is fixedly installed on the two support rods. The temperature-sensing displacement assembly includes a frame and a piston cylinder. The frame is fixed to the support rods by screws. The piston cylinder is fixedly sleeved in the frame. A piston rod is slidably sleeved inside the piston cylinder. An expansion medium is filled between the inner bottom of the piston cylinder and the piston. A stop block is fixedly installed at the end of the piston rod. The stop block is fixedly connected to the slide rod. A first tension spring is sleeved on the piston rod. The two ends of the first tension spring are fixedly connected to the frame and the stop block, respectively.

[0013] Preferably, the fire extinguishing assembly includes a fire extinguishing cylinder, a U-shaped rod, and a counterweight. The counterweight is fixedly connected to both ends of the U-shaped rod, and a roller is rotatably mounted on the crossbar of the U-shaped rod. Vertical limiting grooves are symmetrically opened on the two upright plates of the housing, and the vertical rods on both sides of the U-shaped rod are slidably fitted inside the limiting grooves. A prong is provided at the end of the rod extending into the housing, and the roller of the U-shaped rod is slidably mounted above the prong. A cylinder groove is fixed at the bottom of the housing, and a conveying pipe is provided above the cylinder groove. The conveying pipe extends to the top of the housing and is equipped with multiple nozzles. The fire extinguishing cylinder is installed inside the cylinder groove, and its output end is connected to the conveying pipe. A support rod is provided at the bottom of the lower pressure rod of the fire extinguishing cylinder, and the support rod is fixed to the ear plates of the two upright plates by bolts. The counterweight is located at the top of the upper pressure rod of the fire extinguishing cylinder. When the prong slides and releases the U-shaped rod, the counterweight presses down on the upper pressure rod of the fire extinguishing cylinder, thereby spraying the fire extinguishing medium.

[0014] Preferably, the rotating rod includes a first rotating rod and a second rotating rod with the same outer diameter. A first gear is fixed at the top of the first rotating rod, and the bottom of the first rotating rod extends to form a third rotating rod by means of a reduced diameter. The top of the second rotating rod is a hollow structure, and the third rotating rod is installed inside the second rotating rod through a one-way bearing. The adjacent ends of the first and second rotating rods are rotatably abutted together. A first ratchet is provided on the first rotating rod, and a second ratchet is provided on the second rotating rod. The first ratchet occupies one-quarter of the circumference, and the second ratchet occupies three-quarters of the circumference.

[0015] Preferably, when the piston cylinder expands, driving the piston rod to move outward and displacing the slide rod, the slide rod drives the first rotating rod to rotate through a gear and rack transmission. At this time, the one-way bearing rotates freely, and the second rotating rod remains stationary. When the piston cylinder contracts inward and the piston rod moves in the opposite direction, the one-way bearing locks, causing the first and second rotating rods to rotate synchronously.

[0016] Preferably, the locking assembly includes a locking block and a locking rod. The locking block has a through hole for the rotating rod to pass through. An interconnected inclined groove is formed on one side of the through hole. A return spring and a locking rod are slidably installed inside the inclined groove. A square rod is fixed to the end of the locking rod located in the inclined groove. The square rod slides through the locking block. A hand-held cap is provided at the end of the square rod by a plug-in fixing method. The return spring is sleeved on the square rod. A flat-top notch is provided at the end of the locking rod located in the through hole. The first ratchet and the second ratchet are both flat-bottom notches. The flat-top notch of the locking rod cooperates with the flat-bottom notch of the ratchet to restrict the downward movement of the locking block and the isolation plate.

[0017] Preferably, the second rotating rod is connected to the base via a thrust bearing, a reset mark is provided at the bottom of the second rotating rod, and friction damping is provided between the bottom of the second rotating rod and the base to keep the second rotating rod stationary during the idling of the one-way bearing.

[0018] Preferably, a vent is provided on the side of one of the ventilation openings of the housing. Several rotating shafts are rotatably arranged along the radial plane inside the vent. Air vanes are fixed on the rotating shafts. The rotating shafts are located at an eccentric position above the air vanes. A counterweight is added to the bottom of the air vanes so that the air vanes are vertical and close to each other in a closed state when there is no interference. A bidirectional reversible fan is installed on the vent located outside the housing. The end of the bidirectional reversible fan away from the housing extends to the outside of the working area through an air duct. A temperature sensor is installed inside the housing. The temperature sensor controls the start of the bidirectional reversible fan through an electrical connection.

[0019] Preferably, a second rotating shaft is fixedly inserted axially through the adjusting blades in the two vents, and the two ends of the second rotating shaft are rotatably installed inside the side walls of the vents. When the adjusting blades are in a vertical state, they remain close to each other and form a seal. A third gear is fixedly installed on the second rotating shaft of the adjusting blades on the same side of the bidirectional reversible fan, and the second rotating shaft is installed to the side wall of the vent via a rotating bearing. A second gear is fixedly installed at the end of the rotating shaft near the third gear. A sliding groove is provided in the side plate area of ​​the housing where the second and third gears are located, and two fixedly connected first gears are slidably installed inside the sliding groove. The second rack and the third rack are of different lengths, with the third rack being shorter than the second rack. The second rack meshes with all the third gears, and the third rack meshes with the second gear. When the bidirectional reversible fan is drawing air, the bottom of the air deflects in the direction of the bidirectional reversible fan, creating an opening that drives the shaft and the second gear to rotate in the same direction. Through the two racks, multiple third gears are driven to rotate in the same direction, causing multiple adjusting blades to move vertically closer to each other and form a closed state. When the bidirectional reversible fan stops, the air deflector returns to a vertical position under the action of counterweight, and the multiple adjusting blades unfold to allow air to pass through through the gear and rack transmission.

[0020] Preferably, a touch rod and an L-rod are provided on the top of the isolation plate near the vent. A stop switch is provided on the upper part of the side plate near the vent, and an open switch is provided on the lower part. The touch rod, the stop switch, and the open switch are on the same vertical line. The touch rod will sequentially touch the stop switch and the open switch as the isolation plate slides down. The second rack is located between the vent and the line connecting the stop switch and the open switch. In the vertical plane, the L-rod is located between the side plate and the touch rod. The horizontal end of the L-rod extends towards the side plate to form the second touch rod. The second touch rod and the third rack are on the same vertical line. As the second touch rod slides down to the bottom of the isolation plate, it will abut against and drag the end of the third rack excessively downward, causing the third rack to disengage from the second gear. Moreover, the second rack engages with the third gear to drive the adjusting blade to open.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. This invention achieves automatic switching between different states through the linkage design of ventilation, triggering, and fire extinguishing mechanisms, ensuring optimal working conditions for either extraction or blowing, timely heat dissipation of the internal components, and timely cooling and ventilation to prevent reignition in case of fire. It also prevents metering equipment from being damaged by prolonged exposure to high temperatures and effectively avoids the impact of surrounding polluted air on the metering equipment. The use of paraffin wax as a temperature-sensitive expansion medium reduces the probability of false triggering of the fire extinguishing mechanism. The adoption of a purely mechanical fire extinguishing triggering structure avoids risks such as performance degradation and poor contact of electronic components, ensuring the immediacy and reliability of the triggering action and providing a final safety guarantee for the metering equipment. The use of prefabricated fire extinguishing cylinders as fire extinguishing equipment enhances the system's adaptability and versatility, improves maintenance and replacement speed, and reduces prefabrication costs.

[0023] 2. In this invention, the linear movement of the piston rod driven by the thermal expansion of paraffin inside the piston cylinder is transformed into the precise rotation of the first and second rotating rods at different time periods through the coordinated design of the first rotating rod, the second rotating rod, and the locking block. This drives the isolation plate to achieve a phased descent action, which can not only close the vent to achieve a sealed fire extinguishing environment when a fire occurs, but also reopen the vent to restore the heat dissipation and ventilation function after the fire is extinguished, effectively ensuring the operational safety of the metering equipment.

[0024] Specifically, when the sliding rod moves due to the increased internal temperature of the housing, the first rotating rod is driven to rotate through the engagement of the first gear and the first rack. Due to the free-spinning characteristic of the one-way bearing, the second rotating rod remains stationary. During the rotation of the first rotating rod, the first ratchet and the flat-top notch gradually move away from each other until they are completely disengaged. The circumferential surface of the first rotating rod pushes the locking rod into the inclined groove. The locking block and the isolation plate slide down the first rotating rod together. When the flat-top notch locks with the second ratchet, the isolation plate stably seals the vent, making full preparation for the fire extinguishing cylinder to spray the extinguishing medium. When the sliding rod moves in the opposite direction due to the decrease in internal temperature... At this time, the first rotating rod is driven to rotate in the opposite direction through the cooperation of the first gear and the first rack. At this time, the one-way bearing is in the locked state, and the first rotating rod and the second rotating rod rotate synchronously in the opposite direction. Due to the design of the second ratchet with an extended path of three-quarters of the circumference, the process of the locking block disengaging from the second ratchet requires an additional time interval, which effectively avoids the risk of reignition of the fire inside the box caused by rapid opening. When the first ratchet and the second ratchet gradually move away from each other until they are completely disengaged during the rotation of the second rotating rod, the locking block and the isolation plate slide down along the second rotating rod together, reopening the vent, which is conducive to the smooth operation of ventilation and heat dissipation.

[0025] 3. The bidirectional reversible fan in this invention automatically switches between suction, stop, and air supply to the inside of the housing under different states, while simultaneously triggering the adjacent regulating blades to close or open to match the operating conditions of the bidirectional reversible fan, preventing short-circuiting of the airflow inside the housing and maintaining a stable heat dissipation state; specifically,

[0026] Under normal operating conditions, the adjusting blades on both sides remain unobstructed, forming natural convection for heat dissipation, and the air deflector is in the closed state. When the temperature sensor inside the housing detects that the temperature has reached the preset threshold, the system automatically starts the ventilation function of the bidirectional reversible fan. The bottom of the air deflector shifts and rotates towards the bidirectional reversible fan, opening up. The air deflector drives the rotating shaft and the second gear to rotate. The second gear meshes with the third rack, causing both racks to move simultaneously. The meshing of the two racks drives all the third gears to rotate together with the second gear in the same direction. The third gear drives the adjusting blades to rotate to a vertical position close to each other, forming a closed state. The air deflector in the vent opens and forms forced convection with the vent on the opposite side, significantly enhancing the heat dissipation effect. When the internal temperature is lower than the threshold, the bidirectional reversible fan stops, and the air deflector returns to the closed state. Due to the counterweight at the bottom of the air deflector, the lightweight double rack and adjusting blades move. The adjusting blades rotate to the initial position, maintaining the opening and maintaining natural convection with the vent on the opposite side.

[0027] When the temperature continues to rise during a fire, the sliding rod moves due to the increased internal temperature of the enclosure. The sliding rod, through the gear rack and the first rotating rod, causes the isolation plate to slide down, blocking the vents. During this descent, the contact rod triggers the stop switch, shutting off the exhaust function of the bidirectional reversible fan, keeping the enclosure sealed and facilitating the spraying of fire extinguishing cylinders. When the fire stabilizes and the temperature decreases, the sliding rod moves in the opposite direction. Through the cooperation of the second rotating rod and the locking block, the locking block fixed on the isolation plate disengages from the second ratchet and continues to slide down, opening the vents. During this descent, the contact rod triggers the open switch, activating the air supply function of the bidirectional reversible fan. Simultaneously, the second contact rod on the L-rod pulls the third rack downwards, disengaging the third rack from the second gear. The rack continues to move downwards, driving the third gear to rotate, keeping the adjusting vanes open and connecting the vents on both sides for rapid heat dissipation and ventilation. The excessive dragging of the L-rod on the third rack removes the mechanical constraint that prevents the fan plate and adjusting vanes from opening synchronously, ensuring maximum ventilation and heat dissipation during the recovery phase.

[0028] 4. In this invention, paraffin wax is used as a temperature-sensitive expansion medium, which reduces the probability of false triggering of the fire extinguishing mechanism; a purely mechanical fire extinguishing triggering structure is adopted to avoid risks such as performance degradation and poor contact of electronic components, ensuring the immediacy and reliability of the triggering action and providing a final safety guarantee for the metering equipment; and prefabricated fire extinguishing cylinders are used as fire extinguishing equipment to enhance the system's adaptability and versatility, improve maintenance and replacement speed, and reduce prefabrication production costs.

[0029] Specifically, compared to traditional bimetallic strips or fusible alloy temperature sensing elements, the innovative paraffin application design features a unique "contraction followed by expansion" phase change process, forming a natural temperature buffer zone. During initial melting, the paraffin slightly shrinks in volume, preventing the piston rod inside the piston cylinder from generating outward thrust and avoiding false triggering due to temperature fluctuations during normal high-load operation of the metering equipment. As the temperature continues to rise, the liquid paraffin significantly thermally expands, increasing in volume. This expansion force pushes the piston rod to drive the slide rod, ensuring the fire extinguishing mechanism only activates under true fire hazard conditions. The fire extinguishing triggering mechanism of this invention employs a purely mechanical structure, triggering the fire extinguishing cylinder's activation through the gravitational potential energy of a counterweight. A vent is closed or opened via an isolation plate to facilitate fire extinguishing and heat dissipation. The mechanical structure is unaffected by harsh environments such as high temperatures, dense smoke, and electromagnetic interference, avoiding risks such as performance degradation and poor contact of electronic components, ensuring the immediacy and reliability of the triggering action. Using commercially available standard-specification fire extinguishing cylinders facilitates procurement and inventory management. Different capacities and pressure ratings can be selected according to application requirements, eliminating the need for specialized customization or complex adaptation modifications during replacement, significantly reducing maintenance costs and technical barriers. Attached Figure Description

[0030] Figure 1 This is a three-dimensional schematic diagram of the overall installation structure of the metering box of the present invention;

[0031] Figure 2 This is a three-dimensional schematic diagram of the internal installation structure of the metering box of the present invention;

[0032] Figure 3 This is a three-dimensional schematic diagram of the internal disassembled structure of the metering box of the present invention;

[0033] Figure 4 This is a three-dimensional schematic diagram of the internal structure of the metering box of the present invention.

[0034] Figure 5 This is a three-dimensional schematic diagram of the sliding rod arrangement inside the metering box of the present invention;

[0035] Figure 6 This is a schematic diagram of the disassembled structure of the rotating rod and locking block inside the metering box of the present invention;

[0036] Figure 7 This is a schematic diagram of the installation structure of the rotating rod and locking block inside the metering box of the present invention;

[0037] Figure 8 This is a three-dimensional schematic diagram showing the positional relationship of the ventilation openings inside the metering box of the present invention;

[0038] Figure 9 This is a three-dimensional schematic diagram of the installation structure of the air plate and double rack inside the metering box of the present invention;

[0039] Figure 10 This is a three-dimensional schematic diagram of the disassembled structure of the air plate and double rack inside the metering box of the present invention;

[0040] In the diagram: Box body-11; Box body-12; Fire extinguishing cylinder-13; Measuring device-14; Support rod-15; Adjusting blade-16; Isolation plate-17; First rotating rod-18; Two-way reversible fan-19; U-shaped rod-20; Support rod-21; Counterweight block-22; Vertical plate-23; Bottle slot-24; Vertical limiting slide groove-25; Pick-up head-26; Frame body-27; Piston cylinder-28; First tension spring-29; Slide rod-30; Locking block-31; Second rotating rod-32; First gear-33; First rack-pinion-34; Delivery pipe-35; Handheld cap-36; First ratchet-37; One-way bearing-38; Second ratchet-39; Reset mark -40; Third rotating rod -41; Contact rod -42; L rod -43; Guide rod -44; Stop switch -45; Opening switch -46; Ventilation port -47; Slide groove -48; Second rack -49; Third rack -50; Third gear -51; Air vane -52; Rotating shaft -53; Second gear -54; Base -55; Through hole -56; Locking rod -57; Flat top notch -58; Reset spring -59. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

[0042] Contents not described in detail in this specification are prior art known to those skilled in the art. In the description of this invention, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, terms such as "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0043] Figures 1-10 As shown, a fireproof metering box with a heat dissipation structure includes a box body 11. Ventilation openings are provided on both sides of the box body 11, and adjusting blades 16 are installed on each ventilation opening. Guide rods 44 are fixed on both sides of the ventilation openings, extending to both ends. Isolation plates 17 are slidably fitted onto the guide rods 44, and locking components are fixed on the isolation plates 17. A temperature-sensing displacement component and a sliding rod 30 are provided at the top inside the box body 11. The sliding rod 30 slides through the side panels of the box body where the two ventilation openings are located. The temperature-sensing displacement component is fixedly installed at the top inside the box body, and its movable output end is fixedly connected to the sliding rod 30. A rotating rod is movably inserted through the locking component. One end of the rotating rod is rotatably mounted on the box body base 55, and the other end of the rotating rod... The slide rod 30 extends to the bottom of the slide rod 30 and a first gear 33 is installed at the end of the slide rod 30. A first rack 34 is fixed at the bottom end of the slide rod 30 near the first gear 33. The first racks 34 at both ends of the slide rod 30 respectively mesh with the adjacent first gear 33. A box 12 is fixed on one side of the box 11. One end of the slide rod 30 extends into the box 12. A fire extinguishing component is installed inside the box 12. The extended end of the slide rod 30 is detachably connected to the fire extinguishing component. When a fire occurs and the temperature rises inside the box 11, the temperature sensing displacement component is triggered to push the slide rod 30. When the slide rod 30 moves, it causes the isolation plate 17 to fall and block the vent. At the same time, the fire extinguishing component is triggered to spray fire extinguishing medium into the box 11. A metering device 14 is installed on the back plate of the box 11.

[0044] This invention achieves automatic switching under different conditions through the linkage design of ventilation, triggering and fire extinguishing mechanisms, so that the air extraction or blowing reaches the optimal working condition and heats up the inside of the box 11 in time. In the event of a fire, it can not only cool down and ventilate in time to prevent reignition, but also prevent the metering equipment from being damaged by being in a high-temperature environment for a long time. It can also effectively prevent the impact of the surrounding polluted air on the metering equipment 14. The following will be described in detail.

[0045] Furthermore, two support rods 15 are fixedly installed parallel to the slide rod 30 at the inner top of the box 11. The two ends of the support rods 15 are fixedly connected to the side plates of the box 11. The temperature sensing displacement assembly is fixedly installed on the two support rods 15. The temperature sensing displacement assembly includes a frame 27 and a piston cylinder 28. The frame 27 is fixed to the support rod 15 by screws. The piston cylinder 28 is fixedly sleeved in the frame 27. The piston rod is slidably sleeved inside the piston cylinder 28. An expansion medium is filled between the inner bottom of the piston cylinder 28 and the piston. A stop block is fixedly installed at the end of the piston rod. The stop block is fixedly connected to the slide rod 30. A first tension spring 29 is sleeved on the piston rod. The two ends of the first tension spring 29 are fixedly connected to the frame 27 and the stop block, respectively.

[0046] In the process of cooling, after the expansion medium expands and releases the extended piston rod, the first tension spring 29 is used to pull the extended piston rod back to its original position, thereby causing the slide bar 30 to move back.

[0047] The expansion medium can be paraffin. Below 65 degrees Celsius, paraffin is fixed. When it reaches its melting point, it melts. When it melts, its overall volume shrinks. If the temperature continues to rise, the liquid paraffin will continue to expand, pushing the piston rod outward and further triggering the enclosure 11 to close. The fire extinguishing component then sprays the fire extinguishing medium into the enclosure.

[0048] During the melting process, paraffin wax first shrinks in volume, thus preventing it from directly triggering the fire extinguishing mechanism and reducing the probability of false triggering of the fire extinguishing mechanism.

[0049] If the slide bar 30 requires a larger stroke, the piston cylinder 28 can be configured with a thicker bottom and a thinner cylinder where the piston contacts, thereby increasing the amount of movement of the expansion medium in the thinner cylinder.

[0050] Furthermore, the fire extinguishing assembly includes a fire extinguishing cylinder 13, a U-shaped rod 20, and a counterweight 22. The counterweight 22 is fixedly connected to both ends of the U-shaped rod 20, and a roller is rotatably mounted on the crossbar of the U-shaped rod 20. Vertical limiting grooves 25 are symmetrically opened on the two upright plates 23 of the box body 12, and the vertical rods on both sides of the U-shaped rod 20 are slidably mounted inside the limiting grooves 25. A protruding head 26 is provided at the end of the sliding rod 30 extending into the box body 12, and the roller of the U-shaped rod 20 is slidably mounted above the protruding head 26. A cylinder groove is fixed at the bottom of the box body 12. 24. A delivery pipe 35 is installed above the bottle tank 24. The delivery pipe 35 extends to the top of the box 11 and is equipped with multiple nozzles. The fire extinguishing cylinder 13 is installed inside the bottle tank 24 and its output end is connected to the delivery pipe 35. A support rod 21 is installed at the bottom of the lower pressure rod of the fire extinguishing cylinder 13. The support rod 21 is fixed to the ear plates of the two upright plates 23 by bolts. The counterweight 22 is located at the top of the upper pressure rod of the fire extinguishing cylinder 13. When the tip 26 slides to release the U-shaped rod 20, the counterweight 22 presses down the upper pressure rod of the fire extinguishing cylinder 13 by gravity, thereby spraying the fire extinguishing medium.

[0051] It should be noted that the fire extinguishing cylinder 13 contains carbon dioxide as the extinguishing medium, which is a commercially available finished product and does not require customization, thus saving costs and improving installation and replacement efficiency.

[0052] In this invention, paraffin wax is used as a temperature-sensitive expansion medium, which significantly reduces the probability of false triggering of the fire extinguishing mechanism; the use of pre-made fire extinguishing cylinders 13 as fire extinguishing equipment enhances the system's adaptability and versatility, improves maintenance and replacement speed, and reduces prefabrication costs; specifically, paraffin wax has unique phase change characteristics, and its volume shows a slight decreasing trend when it initially melts from a solid state, avoiding false activation caused by small temperature fluctuations. Only under subsequent continuous heating will the liquid paraffin wax undergo significant volume expansion, thereby pushing the slide bar 30 to move and trigger the fire extinguishing mechanism. This two-stage response mechanism effectively avoids false system activation caused by normal fluctuations or brief anomalies in ambient temperature.

[0053] Compared to traditional bimetallic or fusible alloy temperature sensing elements, the innovative application of paraffin wax lies in its unique "contraction followed by expansion" phase transition process, forming a natural temperature buffer. In the initial melting stage at 65-70 degrees Celsius, paraffin wax increases in density by approximately 8% as it transitions from solid to liquid, corresponding to a slight volume contraction. At this time, the piston rod inside the piston cylinder 28 does not generate outward thrust, effectively preventing false triggering due to temperature fluctuations during normal high-load operation of the metering device 14. Only when the temperature continues to rise to the 75-85 degree Celsius range does the liquid paraffin wax begin to expand significantly, with a volume increase rate of 10-15%. The resulting expansion force is sufficient to drive the piston rod and slide bar 30, ensuring that the fire extinguishing mechanism is activated only under actual fire hazard conditions. This innovative two-stage temperature response mechanism, compared to the single-threshold triggering method of traditional temperature sensing elements, has higher judgment accuracy and stronger anti-interference capabilities, reducing the probability of false triggering. Simultaneously, the reversible phase transition characteristics of paraffin wax allow the system to automatically reset after temperature reduction, without manual intervention or replacement of consumables, significantly improving the system's reliability and economy.

[0054] This invention employs a purely mechanical triggering structure. The expansion of paraffin wax within the piston cylinder 28 pushes the piston rod, which is then transmitted via the slide rod 30 to a precision gear and rack transmission system consisting of the first gear 33 and the first rack 34. This drives the phased rotation of the first rotating rod 18 and the second rotating rod 32. Combined with locking mechanisms such as the first ratchet 37, the second ratchet 39, and the flat-top notch 58, precise control of the isolation plate 17 is achieved, causing the slide rod 30 to disengage from the U-shaped rod 20. Finally, the gravitational potential energy of the counterweight 22 triggers the activation of the fire extinguishing cylinder 13. The entire process relies entirely on mechanical transmission and physical force, requiring no electronic control components or external power supply. This mechanical triggering structure offers significant stability advantages in fire conditions: firstly, the mechanical structure is unaffected by harsh environments such as high temperatures, dense smoke, and electromagnetic interference, avoiding the need for electronic components to... The system avoids several safety hazards: performance degradation at high temperatures, poor contact due to smoke corrosion, and interference from electromagnetic pulses generated by spark discharge on the control circuit. Secondly, each link in the mechanical transmission chain has definite physical response characteristics, eliminating inherent risks of electronic systems such as software failures, signal loss, or processing delays, ensuring the immediacy and reliability of the triggering action. Thirdly, the gear rack, ratchet lock, and other mechanical structures are precisely designed and manufactured, possessing extremely high mechanical strength and durability, maintaining stable transmission accuracy even in long-term harsh environments, with a failure rate far lower than that of electronic control systems. Finally, the self-locking characteristics and gravity-driven mechanism of the mechanical structure ensure that even if some components are damaged, the critical fire extinguishing triggering function can still be reliably executed, providing a final safety guarantee for the metering equipment 14.

[0055] In addition, using commercially available standard fire extinguishing cylinders 13 as the extinguishing medium container not only facilitates procurement and inventory management, but also allows for flexible selection of products with different capacities and pressure ratings according to the needs of different application scenarios. When the fire extinguishing cylinder 13 is used up, users can directly replace it with a standard product of the same specification without the need for special customization or complex adaptation modifications, which greatly reduces the system's operation and maintenance costs and technical threshold. At the same time, the standardized interface design also ensures the safety and reliability of the replacement process.

[0056] Furthermore, the rotating rod includes a first rotating rod 18 and a second rotating rod 32 with the same outer diameter. A first gear 33 is fixed at the top of the first rotating rod 18, and the bottom of the first rotating rod 18 extends to form a third rotating rod 41 by means of a reduced diameter. The top of the second rotating rod 32 has a hollow structure, and the third rotating rod 41 is installed inside the second rotating rod 32 by means of a one-way bearing 38. The adjacent ends of the first rotating rod 18 and the second rotating rod 32 are rotatably abutted together. The first rotating rod 18 is provided with a first ratchet 37, and the second rotating rod 32 is provided with a second ratchet 39. The first ratchet 37 occupies one-quarter of the circumference, and the second ratchet 39 occupies three-quarters of the circumference. When the piston cylinder 28 expands internally, it drives the piston rod to move outward and pushes the slide rod 30 to move. The slide rod 30 drives the first rotating rod 18 to rotate through the gear and rack transmission. At this time, the one-way bearing 38 rotates freely, and the second rotating rod 32 remains stationary. When the piston cylinder 28 contracts inward and the piston rod moves in the opposite direction, the one-way bearing 38 locks, so that the first rotating rod 18 and the second rotating rod 32 rotate synchronously.

[0057] Under normal operating conditions, the regulating blades 16 on both sides remain unobstructed, forming natural convection for heat dissipation. When the temperature sensor inside the housing 11 detects that the temperature has reached a preset threshold, the system automatically activates the ventilation function of the bidirectional reversible fan 19. The air deflector 52 unfolds as the fan rotates, and the air deflector 52 drives the adjacent regulating blades 16 to close through a double rack and pinion structure. The bidirectional reversible fan 19 and the opening regulating blades 16 on the opposite side form forced convection, ensuring that the airflow covers the depth area of ​​the housing and improving heat dissipation efficiency. When a fire occurs and the temperature continues to rise, the paraffin inside the piston cylinder 28 begins to melt. The expansion of the liquid paraffin pushes the piston rod to move, causing the slide rod 30 to shift. This triggers the first rotating rod 18 to rotate, causing the isolation plate 17 to slide down and close the vent. At the same time, the bidirectional reversible fan 19 is shut down, and the air deflector 52 closes the ventilation opening 47, making the interior of the housing 11 sealed and isolating external air. Simultaneously, the slide rod 30 triggers the fire extinguishing mechanism, and the counterweight 2... 2. The cylinder falls onto the upper pressure rod of the fire extinguishing cylinder 13, activating the fire extinguishing cylinder 13 to spray carbon dioxide extinguishing medium onto the metering device 14 for rapid fire extinguishing control. When the fire is under control and the internal temperature of the housing 11 drops, the volume of paraffin inside the piston cylinder 28 shrinks, the piston rod retracts, and the sliding rod 30 moves in the opposite direction, triggering the first rotating rod 18 to rotate, causing the isolation plate 17 to slide down to the bottom position and reopen the vents on both sides. The isolation plate 17 on the side adjacent to the first rotating rod 18 is disengaged from the wind plate 52 through the double rack and pinion structure linkage, and at the same time, it drives the adjusting blades 16 to unfold to form a convection channel. The isolation plate 17 triggers the opening switch 46 to start the air supply function, injecting fresh air into the housing 11. This not only achieves timely cooling and ventilation to prevent reignition, but also prevents the metering device from being damaged by prolonged exposure to high temperatures. It also effectively prevents the impact of surrounding polluted air on the metering device 14, further ensuring the operational safety of the metering device 14.

[0058] Furthermore, the locking assembly includes a locking block 31 and a locking rod 57. The locking block 31 has a through hole 56 for the rotating rod to pass through. An interconnected inclined groove is formed on one side of the through hole 56. A return spring 59 and the locking rod 57 are slidably installed inside the inclined groove. A square rod is fixed to the end of the locking rod 57 located in the inclined groove. The square rod slides through the locking block 31. A hand-held cap 36 is fixed to the end of the square rod by a plug-in method. The return spring 59 is sleeved on the square rod. A flat-top notch 58 is provided at the end of the locking rod 57 located in the through hole 56. The first ratchet 37 and the second ratchet 39 are both flat-bottom notches. The flat-top notch 58 of the locking rod 57 cooperates with the flat-bottom notch of the ratchet to restrict the downward movement of the locking block 31 and the isolation plate 17.

[0059] It should be noted that, due to the stretching force of the return spring 59, the flat-top notch 58 of the locking rod 57 is located in the through hole 56. The flat-top notch 58 and the flat-bottom notch of the ratchet cooperate to form a lock, restricting the downward movement of the locking block 31 and the isolation plate 17. When the first rotating rod 18 and the second rotating rod 32 are driven to rotate, the ratchet will rotate axially and gradually disengage from the flat-top notch 58. The complete circumference of the rotating rod without the ratchet pushes the locking rod 57 into the inclined groove. The ratchet structure is disengaged from the limit. Under the action of gravity, the locking block 31 and the isolation plate 17 slide down together.

[0060] The locking block 31 slides down from the first ratchet 37 onto the second rotating rod 32. Since the second ratchet 39 occupies three-quarters of the circumference, the locking block 31 remains locked in place with the second rotating rod 32. The isolation plate 17 blocks the vent, which is conducive to the sealed extinguishing of the fire extinguishing medium. When the second rotating rod 32 rotates, the second ratchet 39 disengages from the flat top notch 58 and is limited. The isolation plate 17 continues to slide down, releasing the blockage of the vent, which is conducive to the rapid ventilation and heat release of the inside of the box 11 after the fire is extinguished, and avoids the residual heat from damaging the metering equipment 14 or other components.

[0061] The hand-held cap 36 is used for hand-pulling, which facilitates reset. The hand-held cap 36 also has a limiting function to prevent the locking rod 57 from falling out of the inclined groove.

[0062] The first ratchet 37 occupies one-quarter of the circumference, and the second ratchet 39 occupies three-quarters of the circumference. When the piston cylinder 28 retracts inward to reset, the three-quarters circumference design ensures that the rotating rod has enough time to rotate, so that the interior of the fire-prone box 11 remains in a closed environment and covered by extinguishing medium for a sufficient time to prevent the fire from reigniting.

[0063] Furthermore, the second rotating rod 32 is connected to the base 55 via a thrust bearing, a reset mark 40 is provided at the bottom of the second rotating rod 32, and a friction damper is provided between the bottom of the second rotating rod 32 and the base 55 to keep the second rotating rod 32 stationary during the idling of the one-way bearing.

[0064] It should be noted that the thrust bearing is used to bear axial loads, which is beneficial to the stable rotation of the structure; the reset mark 40 is set so that after the second rotating rod 32 completes the ventilation, it can be quickly reset.

[0065] The design of the first rotating rod 18, the second rotating rod 32 and the locking block 31 in this invention transforms the linear movement of the piston rod driven by the thermal expansion of paraffin inside the piston cylinder 28 into the precise rotation of the first rotating rod 18 and the second rotating rod 32 at different time periods, thereby driving the isolation plate 17 to achieve a phased falling action. This can both close the vent to achieve a sealed fire extinguishing environment when a fire occurs, and reopen the vent to restore the heat dissipation and ventilation function after the fire is extinguished, effectively ensuring the operational safety of the metering equipment 14.

[0066] Specifically, when the slide rod 30 moves due to the internal temperature rise of the housing 11, the first rotating rod 18 is driven to rotate through the cooperation of the first gear 33 and the first rack 34. Due to the free-spinning characteristic of the one-way bearing 38, the second rotating rod 32 remains stationary. During the rotation of the first rotating rod 18, the first ratchet 37 and the flat-top notch 58 gradually move away from each other until they are completely disengaged. The circumferential surface of the first rotating rod 18 pushes the locking rod 57 into the inclined groove. The locking block 31 and the isolation plate 17 slide down the first rotating rod 18 together. When the flat-top notch 58 locks with the second ratchet 39, the isolation plate 17 stably seals the vent, making full preparation for the fire extinguishing cylinder 13 to spray the extinguishing medium. When the slide rod 30 moves due to the internal temperature drop, When moving in the reverse direction, the first rotating rod 18 is driven to rotate in the reverse direction by the cooperation of the first gear 33 and the first rack 34. At this time, the one-way bearing 38 is in a locked state, and the first rotating rod 18 and the second rotating rod 32 rotate in the opposite direction synchronously. Since the second ratchet 39 has an extended path design of three-quarters of the circumference, the process of disengaging the locking block 31 from the second ratchet 39 requires an additional time interval, which effectively avoids the risk of reignition of the fire inside the box 11 caused by rapid opening. When the first ratchet 37 and the second ratchet 39 gradually move away from each other until they are completely disengaged during the rotation of the second rotating rod 32, the locking block 31 and the isolation plate 17 slide down along the second rotating rod 32 together, reopening the vent, which is conducive to the smooth operation of ventilation and heat dissipation.

[0067] Furthermore, a vent 47 is provided on the side of one of the ventilation openings of the housing 11. Several rotating shafts 53 are rotatably arranged along the radial plane inside the vent 47. Air vanes 52 are fixed on the rotating shafts 53. The rotating shafts 53 are located at an eccentric position above the air vanes 52. A counterweight is added to the bottom of the air vanes 52 so that the air vanes 52 are vertical and close to each other in a closed state when there is no interference. A bidirectional reversible fan 19 is installed on the vent 47 located outside the housing 11. The end of the bidirectional reversible fan 19 away from the housing 11 extends to the outside of the working area through an air duct. A temperature sensor is installed inside the housing 11. The temperature sensor controls the start of the bidirectional reversible fan 19 through an electrical connection.

[0068] It should be noted that the bidirectional reversible fan 19 can be a bidirectional axial flow fan, which can achieve air intake or blowing by controlling the forward and reverse rotation of the bidirectional axial flow fan. The bidirectional axial flow fan is commercially available and belongs to the prior art. The working principle will not be explained in detail here.

[0069] The air duct extends beyond the work area to ensure that fresh air from outside is blown into the chamber 11 to replace the polluted air inside the chamber, and also to prevent poor-quality air near the fire point from being introduced into the chamber, which would affect the treatment effect.

[0070] The temperature sensor is electrically connected to the bidirectional reversible fan 19 by other components, including: a temperature controller (responsible for receiving sensor signals, comparing them with preset thresholds, and issuing control commands), a relay or solid-state relay (acting as a power switch to safely switch the fan's power circuit on and off under controller commands), and a power supply providing appropriate voltage to the controller and the relay / solid-state relay. Furthermore, a fuse or circuit breaker is installed in the fan's power circuit for overcurrent protection, and RC buffer circuits or varistors are configured for the relay contacts or solid-state relay outputs to handle voltage spikes generated by the inductive load (motor). Finally, the sensor, controller, relay / solid-state relay, protection components, power supply, and fan are correctly connected according to signal and power flows via connecting wires to form a complete automatic temperature-controlled fan system. The above is prior art; the external power supply and control system used in this application are also prior art, and their principles are not described in detail here.

[0071] Furthermore, a second rotating shaft is fixedly inserted axially through the adjusting blades 16 in each of the two vents. The two ends of the second rotating shaft are rotatably mounted inside the side walls of the vents. When the adjusting blades 16 are both in a vertical position, they remain close to each other and form a seal. A third gear 51 is fixedly mounted on the second rotating shaft of the adjusting blade 16 on the same side of the bidirectional reversible fan 19. The second rotating shaft is connected to the side wall of the vent via a rotating bearing. A second gear 54 is fixedly mounted at the end of the rotating shaft 53 near the third gear 51. A sliding groove 48 is provided in the side plate area of ​​the housing where the second gear 54 and the third gear 51 are located. Two fixedly connected second racks 49 and... are slidably mounted inside the sliding groove 48. The third rack 50 is shorter than the second rack 49. The second rack 49 meshes with all the third gears 51, and the third rack 50 meshes with the second gear 54. When the bidirectional reversible fan 19 is drawing air, the bottom of the air deflector 52 rotates in the direction of the bidirectional reversible fan 19 to create an opening, which drives the rotating shaft 53 and the second gear 54 to rotate in the same direction. Through the two racks, multiple third gears 51 are driven to rotate in the same direction, so that multiple adjusting blades 16 are vertically close to each other to form a closed state. When the bidirectional reversible fan 19 stops, the air deflector 52 returns to the vertical state under the action of the counterweight, and the multiple adjusting blades 16 are opened to allow air to pass through through the gear and rack transmission.

[0072] It should be noted that the second rack 49, the third rack 50 and the adjusting blade 16 are all made of lightweight material, which facilitates the adjustment of the angle. The upper and lower parts of the adjusting blade 16 are equipped with sealing strips. When adjacent adjusting blades 16 are close to each other, the sealing strips produce a certain sealing effect, preventing rapid air convection and avoiding reignition of the burning equipment covered by the extinguishing agent.

[0073] The second rotating shaft of the adjusting blade 16 on the side away from the bidirectional reversible fan 19 is provided with friction damping between it and the inner wall of the vent, so that the adjusting blade 16 remains stable. The adjusting blade 16 on the side away from the bidirectional reversible fan 19 is kept in the open state and is sealed by the isolation plate 17. The ventilation volume can also be changed by manually adjusting the distance between adjacent adjusting blades 16.

[0074] In this invention, the bidirectional reversible fan 19 automatically switches between suction, stop, and air supply to the inside of the housing 11 under different states, while simultaneously triggering the adjacent regulating blades 16 to close or open to match the operating conditions of the bidirectional reversible fan 19, preventing short-circuiting of the airflow inside the housing 11 and maintaining a stable heat dissipation state; specifically,

[0075] Under normal operating conditions, the adjusting blades 16 on both sides remain unobstructed, forming natural convection for heat dissipation, and the fan plate 52 is in the closed state. When the temperature sensor inside the housing 11 detects that the temperature has reached the preset threshold, the system automatically starts the ventilation function of the bidirectional reversible fan 19. The bottom of the fan plate 52 is offset and rotated towards the bidirectional reversible fan 19 and unfolds. The fan plate 52 drives the rotating shaft 53 and the second gear 54 to rotate. The second gear 54 meshes with the third rack 50, causing both racks to move simultaneously. The meshing of the two racks drives all the third gears 51 together with the second gear. Wheel 54 rotates in the same direction, and the third gear 51 drives the adjusting blades 16 to rotate to a vertical position close to each other to form a closed state. The air deflector 52 in the vent 47 opens and forms forced convection with the air vent on the opposite side, which significantly enhances the heat dissipation effect. When the internal temperature is lower than the threshold, the bidirectional reversible fan 19 stops, and the air deflector 52 returns to the closed state. Due to the counterweight at the bottom of the air deflector 52, the lightweight double rack and adjusting blades 16 move. The adjusting blades 16 rotate to the initial position, maintaining the opening and maintaining natural convection with the air vent on the opposite side.

[0076] When the fire temperature continues to rise, the sliding rod 30 moves due to the increased temperature inside the housing 11. The sliding rod 30, through the gear rack and the first rotating rod 18, causes the isolation plate 17 to slide down and block the vent. During this descent, the contact rod 42 activates the stop switch 45, shutting off the ventilation function of the bidirectional reversible fan 19, thus maintaining a sealed state inside the housing 11 and facilitating the spraying of the fire extinguishing cylinder 13. When the fire stabilizes and the temperature decreases, the sliding rod 30 moves in the opposite direction. Through the cooperation of the second rotating rod 32 and the locking block 31, the locking block 31 fixed on the isolation plate 17 disengages from the second ratchet 39 and continues to slide down, opening the vent. During the downward movement of the isolation plate 17, the contact rod 42 touches the opening switch 46 to activate the air supply function of the bidirectional reversible fan 19. At the same time, the second contact rod on the L rod 43 pulls the third rack 50 downwards together, causing the third rack 50 and the second gear 54 to disengage from the transmission. The rack continues to move downwards, driving the third gear 51 to rotate and keeping the adjusting blade 16 open, so that the air vents on both sides are connected for rapid heat dissipation and ventilation. The excessive dragging of the third rack 50 by the L rod 43 removes the mechanical constraint that the fan plate 52 and the adjusting blade 16 cannot open synchronously, ensuring that the system can achieve the maximum ventilation and heat dissipation effect during the recovery phase.

[0077] Furthermore, a touch rod 42 and an L-shaped rod 43 are provided on the top of the isolation plate 17 near the vent 47. A stop switch 45 is provided on the upper part of the side panel of the housing near the vent, and an open switch 46 is provided on the lower part. The touch rod 42 is on the same vertical line as the stop switch 45 and the open switch 46. The touch rod 42 will sequentially touch the stop switch 45 and the open switch 46 as it slides down with the isolation plate 17. The second rack 49 is located on the line connecting the vent and the stop switch 45 and the open switch 46. Between; in the vertical plane, L-rod 43 is located between the side plate of the box and the contact rod 42; the horizontal end of L-rod 43 extends toward the side plate of the box to form a second contact rod, the second contact rod and the third rack 50 are on the same vertical line, the second contact rod will abut against and drag the end of the third rack 50 to move excessively downward as the partition plate 17 slides down to the bottom, so that the third rack 50 is disengaged from the second gear 54, and the third gear 51 is driven to open the adjusting blade 16 through the meshing of the second rack 49;

[0078] Stop switch 45 and start switch 46 are used to control bidirectional reversible fan 19. Stop switch 45 and start switch 46 are set as lever-type automatic return switches. When the contact rod 42 contacts and pushes the two lever-type switches, the switch performs its function, but the lever automatically returns to its original position under the action of the spring. This lever-type automatic return switch is existing technology, and its working principle will not be explained in detail here.

[0079] When the isolation plate 17 is above the vent, the locking block 31 and the first ratchet 37 are locked in place through the ratchet structure; when the isolation plate 17 slides down to the vent position, it forms a closed state, and the locking block 31 and the second ratchet 39 are locked in place through the ratchet structure. At this time, the contact rod 42 contacts the stop switch 45 and activates the switch, so that the bidirectional reversible fan 19 stops rotating.

[0080] When the isolation plate 17 slides down below the vent and keeps the vent open, the bottom of the isolation plate 17 lands on the top of the base 55 to form a stable state. At this time, the contact rod 42 on the L rod 43 drags the third rack 50 downward, causing the shorter third rack 50 to disengage from the second gear 54 and disengage the transmission. At the same time, it drives the second rack 49 to move down and engage all the third gears 51, causing the third gears 51 to rotate, so that the adjusting blades 16 unfold to achieve airflow between the inside and outside. Also, the contact rod 42 contacts the switch 46 and activates the switch, so that the bidirectional reversible fan 19 starts blowing air into the box 11, bringing fresh air into the box 11 and then expelling it from the vents on both sides, achieving airflow exchange between the inside and outside and cooling.

[0081] The present invention has been illustrated through the above embodiments, but the present invention is not limited to the above embodiments, that is, it does not mean that the present invention must rely on the above embodiments to be implemented. Those skilled in the art should understand that all related improvements to the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. A fireproof metering box with a heat dissipation structure, comprising a box body (11), wherein air vents are provided on both sides of the box body (11), and adjusting blades (16) are installed on each air vent, characterized in that, Guide rods (44) are fixed on both sides of the vent, and the guide rods (44) extend to both ends. Isolation plates (17) are slidably fitted on the guide rods (44), and locking components are fixed on the isolation plates (17). A temperature-sensing displacement component and a slide rod (30) are set at the top inside the box (11). The slide rod (30) slides through the side plate of the box where the two vents are located. The temperature-sensing displacement component is fixedly installed at the top inside the box. The moving output end of the temperature-sensing displacement component is fixedly connected to the slide rod (30). A rotating rod is movably inserted in the locking component. One end of the rotating rod is rotatably installed on the box base (55), and the other end of the rotating rod extends to the bottom of the slide rod (30). A first gear (33) is installed at the end of the rotating rod. A first rack (34) is fixed at the bottom end of the slide rod (30) near the first gear (33), and the first racks (34) at both ends of the slide rod (30) mesh with the adjacent first gear (33); a box body (12) is fixed on one side of the box body (11), and one end of the slide rod (30) extends into the box body (12). A fire extinguishing component is installed inside the box body (12), and the extended end of the slide rod (30) is detachably connected to the fire extinguishing component; when a fire occurs and the temperature rises inside the box body (11), the temperature sensing displacement component is triggered to push the slide rod (30). When the slide rod (30) moves, it causes the isolation plate (17) to fall and block the vent, and at the same time, the fire extinguishing component is triggered to spray fire extinguishing medium into the box body (11); Two support rods (15) are fixedly installed on the inner top of the box (11) parallel to the slide rod (30). The two ends of the support rods (15) are fixedly connected to the side plate of the box (11). The temperature sensing displacement assembly is fixedly installed on the two support rods (15). The temperature sensing displacement assembly includes a frame (27) and a piston cylinder (28). The frame (27) is fixed to the support rod (15) by screws. The piston cylinder (28) is fixedly sleeved in the frame (27). The piston rod is sealed and slidably sleeved inside the piston cylinder (28). An expansion medium is filled between the inner bottom of the piston cylinder (28) and the piston. A stop block is fixedly installed at the end of the piston rod. The stop block is fixedly connected to the slide rod (30). A first tension spring (29) is sleeved on the piston rod. The two ends of the first tension spring (29) are fixedly connected to the frame (27) and the stop block, respectively. The rotating rod includes a first rotating rod (18) and a second rotating rod (32) with the same outer diameter. A first gear (33) is fixed at the top of the first rotating rod (18), and the bottom of the first rotating rod (18) extends to form a third rotating rod (41) by means of a reduced diameter. The top of the second rotating rod (32) is a hollow structure, and the third rotating rod (41) is installed inside the second rotating rod (32) through a one-way bearing (38). The adjacent ends of the first rotating rod (18) and the second rotating rod (32) are rotatably abutted. A first ratchet (37) is provided on the first rotating rod (18), and a second ratchet (39) is provided on the second rotating rod (32). The first ratchet (37) occupies one-quarter of the circumference, and the second ratchet (39) occupies three-quarters of the circumference. When the piston cylinder (28) expands, it drives the piston rod to move outward and pushes the slide rod (30) to move. The slide rod (30) drives the first rotating rod (18) to rotate through the gear and rack transmission. At this time, the one-way bearing (38) rotates freely and the second rotating rod (32) remains stationary. When the piston cylinder (28) contracts inward and the piston rod moves in the opposite direction, the one-way bearing (38) locks, so that the first rotating rod (18) and the second rotating rod (32) rotate synchronously. The locking assembly includes a locking block (31) and a locking rod (57). The locking block (31) has a through hole (56) for the rotating rod to pass through. An inclined groove is provided on one side of the through hole (56). A return spring (59) and a locking rod (57) are slidably installed inside the inclined groove. A square rod is fixed at the end of the locking rod (57) located in the inclined groove. The square rod slides through the locking block (31). A hand cap (36) is provided at the end of the square rod by a plug-in fixed method. The return spring (59) is sleeved on the square rod. A flat-top notch (58) is provided at the end of the locking rod (57) located in the through hole (56). The first ratchet (37) and the second ratchet (39) are both flat-bottom notches. The flat-top notch (58) of the locking rod (57) cooperates with the flat-bottom notch of the ratchet to restrict the downward movement of the locking block (31) and the isolation plate (17).

2. The fireproof metering box with a heat dissipation structure according to claim 1, characterized in that, The fire extinguishing assembly includes a fire extinguishing cylinder (13), a U-shaped rod (20), and a counterweight (22). The counterweight (22) is fixedly connected to both ends of the U-shaped rod (20), and a roller is rotatably mounted on the crossbar of the U-shaped rod (20). Vertical limiting grooves (25) are symmetrically opened on the two upright plates (23) of the box body (12), and the vertical rods on both sides of the U-shaped rod (20) are slidably mounted inside the limiting grooves (25). A pick (26) is provided at the end of the slide rod (30) extending into the box body (12), and the roller of the U-shaped rod (20) is slidably mounted above the pick (26). A cylinder groove (24) is fixedly provided at the bottom of the box body (12). A delivery pipe (35) is installed above the bottle tank (24), and the delivery pipe (35) extends to the top of the box (11) and is equipped with multiple nozzles; the fire extinguishing cylinder (13) is installed inside the bottle tank (24) and the output end is connected to the delivery pipe (35). A support rod (21) is installed at the bottom of the lower pressure rod of the fire extinguishing cylinder (13), and the support rod (21) is fixed to the ear plate of the two upright plates (23) by bolts; the counterweight (22) is located at the top of the upper pressure rod of the fire extinguishing cylinder (13). When the tip (26) slides to release the U-shaped rod (20), the counterweight (22) presses down the upper pressure rod of the fire extinguishing cylinder (13) by gravity, thereby spraying the fire extinguishing medium.

3. The fireproof metering box with a heat dissipation structure according to claim 1, characterized in that, The second rotating rod (32) is connected to the base (55) by a thrust bearing. A reset mark (40) is set at the bottom of the second rotating rod (32). Friction damping is also provided between the bottom of the second rotating rod (32) and the base (55) to keep the second rotating rod (32) stationary during the idling of the one-way bearing.

4. The fireproof metering box with a heat dissipation structure according to claim 1, characterized in that, A ventilation opening (47) is provided on the side of one of the ventilation openings of the housing (11). Several rotating shafts (53) are rotatably arranged along the radial plane inside the ventilation opening. A wind plate (52) is fixed on the rotating shaft (53). The rotating shaft (53) is located at an eccentric position above the wind plate (52). A counterweight is added to the bottom of the wind plate (52) so that the wind plate (52) is in a vertical and close-to-each other closed state when there is no interference. A bidirectional reversible fan (19) is installed on the ventilation opening (47) located outside the housing (11). The end of the bidirectional reversible fan (19) away from the housing (11) extends to the outside of the working area through a duct. A temperature sensor is installed inside the housing (11), and the temperature sensor controls the start of the bidirectional reversible fan (19) through an electrical connection.

5. The fireproof metering box with a heat dissipation structure according to claim 4, characterized in that, A second rotating shaft is fixedly inserted axially on each of the adjusting blades (16) in the two vents. The two ends of the second rotating shaft are rotatably installed inside the side walls of the vents. When the adjusting blades (16) are both in a vertical state, they remain close to each other and form a seal. A third gear (51) is fixedly installed on the second rotating shaft of the adjusting blade (16) on the same side of the bidirectional reversible fan (19). The second rotating shaft is installed with the side wall of the vent through a rotating bearing. A second gear (54) is fixedly installed at the end of the rotating shaft (53) near the third gear (51). A sliding groove (48) is provided in the side plate area of ​​the housing where the second gear (54) and the third gear (51) are located. Two fixedly connected second racks (49) and third racks (51) are slidably installed inside the sliding groove (48). 0), the length of the third rack (50) is less than that of the second rack (49), the second rack (49) meshes with all the third gears (51), and the third rack (50) meshes with the second gear (54); when the bidirectional reversible fan (19) is drawing air, the bottom of the air plate (52) rotates with the wind towards the direction of the bidirectional reversible fan (19) to generate an opening, which drives the rotating shaft (53) and the second gear (54) to rotate in the same direction. Through the two racks, multiple third gears (51) are driven to rotate in the same direction, so that multiple adjusting blades (16) are vertically close to each other to form a closed state; when the bidirectional reversible fan (19) is stopped, the air plate (52) is reset to the vertical state under the action of the counterweight, and multiple adjusting blades (16) are opened to allow air to pass through the gear and rack transmission.

6. The fireproof metering box with a heat dissipation structure according to claim 5, characterized in that, A touch rod (42) and an L-shaped rod (43) are provided on the top of the isolation plate (17) near the vent (47). A stop switch (45) is provided on the upper part of the side panel of the housing near the vent, and an open switch (46) is provided on the lower part. The touch rod (42) is on the same vertical line as the stop switch (45) and the open switch (46). The touch rod (42) will sequentially touch the stop switch (45) and the open switch (46) as it slides down with the isolation plate (17). The second rack (49) is located between the vent and the stop switch (45) and the open switch (46). Between the connecting lines; in the vertical plane, the L rod (43) is located between the side plate of the box and the contact rod (42); the horizontal end of the L rod (43) extends toward the side plate of the box to form the second contact rod, the second contact rod and the third rack (50) are on the same vertical line, the second contact rod will abut and drag the end of the third rack (50) to move excessively downward as the partition plate (17) slides down to the bottom, so that the third rack (50) and the second gear (54) disengage and engage, and the third gear (51) is driven to open the adjusting blade (16) through the meshing of the second rack (49).

Images