A multi-purpose explosion-proof control box

Abstract

The present invention relates to the technical field of explosion-proof control boxes, and particularly to a multi-purpose explosion-proof control box, which includes a box body and a box door. An electrical chamber is arranged inside the box body, and an inspection opening communicating with the electrical chamber is arranged on the front end face of the box body. The box door is installed on the inspection opening. It also includes a surrounding plate, a buffer bag and a top cover. A pressure relief opening communicating with the electrical chamber is arranged on the upper end face of the box body. The surrounding plate is installed around the pressure relief opening of the box body. The buffer bag is cylindrical and is made of a flexible, sealed and fire-resistant material. The lower end of the buffer bag is hermetically connected to the inner wall of the surrounding plate. The buffer bag is folded and stored in the surrounding plate, and the upper end of the buffer bag is connected to the lower end face of the top cover. The top cover is placed on the upper port of the surrounding plate. It guides and absorbs the explosion pressure by increasing the effective volume and collects the flue gas to improve safety.

Description

Technical Field

[0001] The present invention relates to the technical field of explosion-proof control boxes, and particularly to a multi-purpose explosion-proof control box. Background Art

[0002] As a commonly used power distribution device, the explosion-proof control box is widely used in fields such as petrochemical, mining, and pharmaceutical industries. The explosion-proof control box generally adopts a special sealing structure to prevent the electric arc, spark or heat source inside the electrical equipment from igniting the surrounding flammable and explosive substances such as oil and gas, dust, etc., resulting in an explosion, or uses its own special explosion-proof structure and materials to limit the explosion range inside the box after the explosion occurs, and prevent the spark from spreading to the external environment, causing a larger safety accident.

[0003] The Chinese patent application with the publication number CN116667189A in the prior art proposes a modular explosion-proof control box. The modular explosion-proof control box includes a box body and a box cover. Two axially symmetric slide rails are arranged at the bottom of the box body. Each slide rail is provided with a connecting mechanism, and the connecting mechanism can be freely installed on or removed from the slide rail. An installation guide rail is detachably installed on the two connecting mechanisms on both sides. Various electrical components are snap-fitted on the installation guide rail. The connecting mechanism can move up and down along the slide rail to change the relative position of the installation guide rail in the box body. While the connecting mechanism drives the installation guide rail to move up and down, it can also make the movable wire groove slidably installed on the side wall of the box body move to a position convenient for wiring through the bridging rod installed on its side; thus, it can freely add or reduce installation modules and change the relative positions between them, which is convenient for adjustment and maintenance.

[0004] However, the box body of the above explosion-proof control box is an integral structure like the traditional box body. Due to the limited internal space of the box body, it cannot well guide or release the pressure after the explosion of the box body, resulting in the spread of sparks and even the rupture of the box body. Therefore, improvement is needed. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a multi-purpose explosion-proof control box that guides and absorbs the explosion pressure by increasing the effective volume, collects the flue gas, and improves safety.

[0006] A multi-purpose explosion-proof control box of the present invention includes a box body and a box door. An electrical chamber is arranged inside the box body, and a maintenance opening communicating with the electrical chamber is arranged on the front end face of the box body. The box door is installed on the maintenance opening. It also includes a surrounding plate, a buffer bag and a top cover. A pressure relief opening communicating with the electrical chamber is arranged on the upper end face of the box body. The surrounding plate is installed around the pressure relief opening of the box body. The buffer bag is cylindrical and made of a flexible, sealed and fire-resistant material. The lower end of the buffer bag is hermetically connected to the inner wall of the surrounding plate. The buffer bag is folded and stored in the surrounding plate. The upper end of the buffer bag is connected to the lower end face of the top cover. The top cover is placed on the upper port of the surrounding plate. The main control unit and multiple electrical control units are installed in the electrical chamber of the box body. In the normal state, the buffer bag is folded and stored in the surrounding plate, and the top cover covers the upper port of the surrounding plate, so it will not increase much height. When an explosion occurs in the electrical chamber of the box body, the explosion pressure rushes into the buffer bag through the pressure relief opening of the box body, so that the buffer bag expands and stretches upward, and pushes the top cover up from the surrounding plate, thereby increasing the effective volume of the electrical chamber of the box body. The increased volume can guide and absorb the explosion pressure, so that the pressure, smoke, etc. generated by the explosion are collected in the electrical chamber of the box body and the buffer bag, avoiding the spread of sparks to the external environment and even the rupture of the box body, and improving safety.

[0007] Preferably, it further includes a middle mounting frame, side mounting frames, a pressure relief plate one and a pressure relief plate two. The middle mounting frame is installed in the middle of the pressure relief opening of the box body. There are two side mounting frames, and the two side mounting frames are installed on both sides of the pressure relief opening of the box body. The lower end faces of the middle mounting frame and the side mounting frames are both inclined. The pressure relief plate one is hinged on the middle mounting frame, and the pressure relief plate two is hinged on the side mounting frame. The pressure relief plate one and the pressure relief plate two close the pressure relief opening of the box body when laid flat. In the normal state, the pressure relief plate one and the pressure relief plate two cooperate to close the pressure relief opening of the box body, reducing the contact between the buffer bag and air and gases such as ozone in the electrical chamber of the box body, thereby delaying oxidation and increasing the service life of the buffer bag. When an explosion occurs in the electrical chamber of the box body, the pressure and smoke push open the pressure relief plate one and the pressure relief plate two, making the pressure relief opening open, and it will not affect the pressure relief effect.

[0008] Preferably, it further includes a plurality of insertion tubes, a plurality of tips, a plurality of sockets and a plurality of frangible tubes. A plurality of insertion tubes are installed on the lower end surfaces of the middle mounting frame and the side mounting frame. Tips are provided on the upper sides of the outer ends of the plurality of insertion tubes. A plurality of sockets are installed on the lower end surfaces of the first pressure relief plate and the second pressure relief plate. The plurality of sockets and the plurality of insertion tubes are respectively aligned. The two ends of the plurality of frangible tubes are respectively inserted into the respectively aligned plurality of sockets and plurality of insertion tubes. A fire extinguishing agent is stored in the plurality of frangible tubes; the fire extinguishing agent stored in the frangible tubes such as dry ice, dry powder fire extinguishing agent and oxygen-consuming powder, etc. When the first pressure relief plate and the second pressure relief plate close the pressure relief port of the box body, the two ends of the plurality of frangible tubes are respectively inserted into the plurality of insertion tubes and the plurality of sockets, so that the plurality of frangible tubes are arranged on the pressure-bearing surface of the pressure relief port. When an explosion occurs in the electrical chamber of the box body, the first pressure relief plate and the second pressure relief plate drive the plurality of sockets to flip upwards and open, while the plurality of insertion tubes remain stable, thereby breaking the plurality of frangible tubes. During the process of breaking the plurality of frangible tubes, the plurality of tips respectively pierce the upper walls of the plurality of frangible tubes, so that the breaking effect of the plurality of frangible tubes is better. After the plurality of frangible tubes are broken, the fire extinguishing agent therein is sprayed downward at the break to the electrical chamber of the box body to extinguish the explosion and combustion part. The sublimation of dry ice can cool the electrical chamber of the box body to avoid secondary explosion and improve safety.

[0009] Preferably, it further includes an annular groove. Annular grooves are annularly arranged on the outer walls of the plurality of frangible tubes. When the frangible tubes are inserted on the insertion tubes and the sockets, the annular grooves are located below the tips; by providing the annular grooves, the frangible tubes break at the annular grooves, improving the fracture reliability of the frangible tubes.

[0010] Preferably, it further includes a bracket, a telescopic rod, a first spring, a support plate, a wedge block, a hook plate, a bimetallic strip, a piston and a pressure relief pipe. The upper end of the bracket is installed on the lower end surface of the top cover. The lower end of the telescopic rod is connected to the bracket, and the upper end of the telescopic rod is installed with the support plate. The lower end of the first spring is connected to the bracket, and the upper end of the first spring is connected to the support plate. A wedge block is arranged on the side wall of the support plate. The hook plate is elastically installed on the bracket, and a hook matching the wedge block is arranged at the upper end of the hook plate. The bimetallic strip is a thermosensitive metal sheet. The bimetallic strip is disc-shaped at normal temperature and bowl-shaped when heated. The bottom of the bimetallic strip is connected to the support plate, and the upper edge of the bimetallic strip is connected to the lower end of the piston. The pressure relief pipe is installed through the top cover, and the piston is aligned with the lower end of the pressure relief pipe. The piston seals the pressure relief pipe. In the normal state, the elastic force of the first spring extends the telescopic rod, pushing the support plate, the bimetallic strip and the piston upward, so that the piston presses tightly against the lower end surface of the pressure relief pipe for sealing. The bimetallic strip is in a flat disc shape, and the wedge block is located above the hook of the hook plate. When the hot flue gas of the explosion contacts the bimetallic strip, the bimetallic strip expands and bulges downward when heated, making the bimetallic strip into a convex bowl shape. The bimetallic strip pushes the support plate and the wedge block downward, so that the wedge block is hooked by the hook of the hook plate. After the explosion and fire inside the electrical chamber of the box are extinguished and the temperature drops, the bimetallic strip shrinks from the bowl shape to the disc shape, driving the piston to descend. The piston is separated from the pressure relief pipe, opening the pressure relief pipe. The low-temperature gas stored in the buffer bag is discharged through the pressure relief pipe, and the top cover and the buffer bag fall back, balancing the internal and external pressures of the box. At this time, the box door can be opened to repair the inside of the box, realizing automatic pressure relief and having good practicability.

[0011] Preferably, it further includes channel steels, a plurality of sensor units and a plurality of temperature sensors. There are at least two channel steels, which are installed on the top of the box body. The plurality of sensor units are installed on the channel steels and are evenly arranged around the box body. A plurality of temperature sensors are installed on each of the plurality of sensor units and are respectively oriented at different angles towards the box body. The plurality of temperature sensors detect abnormal high temperatures and fire situations in the surrounding environment of the box body. When there is an abnormal high temperature or a fire in the environment, due to different orientations, the plurality of temperature sensors will generate detection signals of different intensities. Among them, the temperature sensor that generates the strongest detection signal A points to the approximate direction of the abnormal high temperature or the fire. The other plurality of temperature sensors that point close to the temperature sensor that generates the strongest detection signal A generate sub-strong detection signals B, C, D, etc. Calculate the ratios of the signal intensities of the plurality of sub-strong detection signals to the signal intensity of the strongest detection signal, such as B / A, C / A, D / A, etc. Virtualize the abnormal high temperature or fire heat source as a point P. The line connecting P and the temperature sensor that generates the strongest detection signal A is the heat radiation line PA, and the lines connecting P and the plurality of temperature sensors that generate sub-strong detection signals are the heat radiation lines PB, PC, PD, etc. Let the angles between PB, PC, PD, etc. and the perpendiculars to the receiving surfaces of the plurality of temperature sensors be ∠b, ∠c, ∠d, etc. Then the above ratios B / A, C / A, D / A, etc. are approximately equal to cosine(b), cosine(c), cosine(d), etc. According to the inverse trigonometric function, the values of the above ∠b, ∠c, ∠d, etc. can be obtained. And the relative positions and angles of the plurality of temperature sensors with respect to the box body are known, and the values of the angles ∠ab, ∠ac, ∠ad, etc. between the orientations of the temperature sensor that generates the strongest detection signal A and the temperature sensors that generate sub-strong detection signals B, C, D, etc. are also known. Thus, the approximate position of point P is determined in reverse according to the values of the above ∠b, ∠c, ∠d, etc. The more the number of signals participating in the detection, the more accurate the position of point P, realizing the positioning of the abnormal high temperature and fire position in the environment.

[0012] Preferably, it further includes a swing arm, a shaft rod, a first gear, a first motor, a second gear, and a gas storage unit. The swing arm movably arranges a launch tube. The hinged end of the swing arm is rotatably connected to the shaft rod. The shaft rod is installed in the inner groove of the channel steel. The first gear is concentrically installed on the shaft rod. The first motor is installed on the swing arm. The output shaft of the first motor concentrically installs the second gear. The second gear meshes with the first gear. The gas storage unit is installed on the swing arm. The gas storage unit is provided with a gas cylinder and a gas pipeline. The output end of the gas pipeline of the gas storage unit is communicated with the launch tube of the swing arm. The gas cylinder stores high-pressure carbon dioxide gas or high-pressure nitrogen gas for fire retardant. The launch tube of the swing arm stores fire extinguishing agent. After multiple temperature sensors cooperate to determine the abnormally high temperature and the fire location, the first motor drives the second gear to rotate. The reaction force of the second gear meshing with the shaft rod drives the swing arm to rotate around the shaft rod, so that the launch tube of the swing arm faces the abnormally high temperature and the fire direction. The gas pipeline of the gas storage unit is opened to inject high-pressure gas into the launch tube of the swing arm, and the fire extinguishing agent is sprayed towards the target area to extinguish the primary fire and improve safety.

[0013] Preferably, it further includes a plurality of first storage barrels and a plurality of second storage barrels. The launch tube of the swing arm is filled with a plurality of first storage barrels and second storage barrels. A plurality of first storage barrels store fire extinguishing agent, and a plurality of second storage barrels store emergency escape equipment. The first storage barrels and the second storage barrels are made of heat-melting materials. The plurality of first storage barrels and the plurality of second storage barrels are sprayed to the abnormally high temperature and fire area. The plurality of first storage barrels are heated and melted to splash out the internal fire extinguishing agent for fire extinguishing. The plurality of second storage barrels are heated and melted to release the emergency escape equipment such as heat insulation blankets and emergency masks therein. The staff in the working fire area can improve the chance of escape after obtaining these emergency escape equipment.

[0014] Preferably, it further includes a bottom plate, magnetic attraction blocks, a power connection module, a first inductor, a wire slot, an expansion module, a magnetic attraction seat, and a second inductor. The bottom plate is installed on the side wall of the box body. Multiple magnetic attraction blocks and a power connection module are installed on the bottom plate. A first inductor and a wire slot are arranged on the power connection module. Multiple wiring terminals are installed at the bottom of the wire slot. Multiple magnetic attraction seats, a second inductor, and a wire insertion module are arranged on the side wall of the expansion module. The multiple magnetic attraction seats are respectively matched with the multiple magnetic attraction blocks. The second inductor is matched with the first inductor. The wire insertion module is matched with the wire slot. Wire insertion terminals matched with the multiple wiring terminals are arranged in the wire insertion module. Different functional units are built in the expansion module according to actual needs. When the functions of the box body need to be expanded, the multiple magnetic attraction seats of the expansion module are respectively inserted and magnetically fixed with the multiple magnetic attraction blocks. At this time, the wire insertion module is inserted into the wire slot, so that the multiple wire insertion terminals are respectively electrically connected with the multiple wiring terminals. At the same time, the second inductor is matched with the first inductor, and technologies such as electronic tags or NFC (Near Field Communication) are used for identity information recognition. The main control unit in the box body determines whether to accept the expansion of the expansion module according to the identity information. When the identity information is matched and confirmed, the functional unit of the expansion module is connected to the main control unit of the box body, so as to temporarily expand the functions of the main control unit in the box body without opening the box door, which is more flexible and convenient.

[0015] Preferably, it further includes a partition board, a second spring, and a positioning rod. A horizontal slot is arranged in the middle of the wire slot. The inner end of the partition board is slidably inserted into the horizontal slot of the wire slot. The outer end of the partition board extends out of the power connection module. The two ends of the second spring are respectively connected to the partition board and the power connection module. A positioning hole is arranged at the outer end of the partition board. The positioning rod is installed on the expansion module and is matched with the positioning hole of the partition board. The elastic force of the second spring pushes the partition board towards the inside of the wire slot, so that the partition board closes the wire slot to prevent the wiring terminals in the wire slot from generating electric sparks to the outside. When installing the expansion module, the wire insertion module is inserted into the wire slot and abuts against the partition board. When the partition board is pulled outwards in place, the adsorption force of the multiple magnetic attraction blocks and the multiple magnetic attraction seats automatically installs the expansion module in place. At this time, the wire insertion terminals of the wire insertion module are inserted into the wiring terminals of the wire slot. At the same time, the positioning rod is inserted into the positioning hole of the partition board to position the partition board. Release the partition board to complete the expansion installation of the expansion module. When removing the expansion module, the positioning rod is taken out from the positioning hole of the partition board, and the elastic force of the second spring pushes the partition board inwards to reset, so that the multiple wiring terminals of the wire slot are not exposed throughout the process, improving safety.

[0016] The beneficial effects of the present invention compared with the prior art are as follows: The main control unit and multiple electrical control units are installed in the electrical chamber of the box body. In the normal state, the buffer bag is folded and stored in the surrounding plate, and the top cover covers the upper port of the surrounding plate, so it will not increase much height. When an explosion occurs in the electrical chamber of the box body, the explosion pressure rushes into the buffer bag through the pressure relief port of the box body, so that the buffer bag expands and stretches upward, and pushes the top cover up from the surrounding plate, thereby increasing the effective volume of the electrical chamber of the box body. The increased volume can guide and absorb the explosion pressure, so that the pressure, smoke, etc. generated by the explosion are collected in the electrical chamber and the buffer bag of the box body, avoiding the spread of sparks to the external environment and even the rupture of the box body, and improving safety. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the present invention;

[0018] Figure 2 is an isometric schematic diagram of the present invention;

[0019] Figure 3 is a schematic front-sectional structural diagram of the present invention in the normal state;

[0020] Figure 4 is a schematic front-sectional structural diagram of the present invention in the explosion state;

[0021] Figure 5 is a schematic exploded structural diagram of structures such as the pressure relief plate one, the pressure relief plate two, the insertion tube, the socket, and the frangible tube;

[0022] Figure 6 is a schematic exploded structural diagram of structures such as the bracket, the telescopic rod, the spring one, the support plate, the elastic piece, the piston, and the pressure relief tube;

[0023] Figure 7 is Figure 3 a partial enlarged structural diagram at A in

[0024] Figure 8 is Figure 4 a partial enlarged schematic diagram at B in

[0025] Figure 9 is a structural diagram of structures such as the sensor unit, the temperature sensor, the swing arm, the shaft rod, the motor one, the gas storage unit, the storage barrel one, and the storage barrel two;

[0026] Figure 10 is a schematic exploded structural diagram of structures such as the bottom plate, the magnetic attraction block, the power connection module, the inductor one, the expansion module, the magnetic attraction seat, the inductor two, the wire insertion module, and the partition board.

[0027] Reference numerals in the drawings: 1, box body; 2, box door; 3, surrounding plate; 4, buffer bag; 5, top cover; 6, middle mounting bracket; 7, side mounting bracket; 8, pressure relief plate one; 9, pressure relief plate two; 10, insertion pipe; 11, tip; 12, socket; 13, fragile pipe; 14, annular groove; 15, bracket; 16, telescopic rod; 17, spring one; 18, support plate; 19, wedge block; 20, hook plate; 21, elastic sheet; 22, piston; 23, pressure relief pipe; 24, channel steel; 25, sensor unit; 26, temperature sensor; 27, swing arm; 28, shaft rod; 29, gear one; 30, motor one; 31, gear two; 32, gas storage unit; 33, storage barrel one; 34, storage barrel two; 35, bottom plate; 36, magnetic attraction block; 37, power connection module; 38, sensor one; 39, wire slot; 40, expansion module; 41, magnetic attraction seat; 42, sensor two; 43, wire insertion module; 44, partition board; 45, spring two; 46, positioning rod. Detailed implementation mode

[0028] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0029] Embodiment 1, as Figures 1 to 8As shown in the figure, a multi-purpose explosion-proof control box includes a box body 1 and a box door 2. An electrical chamber is provided inside the box body 1. An inspection opening communicating with the electrical chamber is provided on the front end face of the box body 1. The box door 2 is installed on the inspection opening. It also includes a surrounding plate 3, a buffer bag 4 and a top cover 5. A pressure relief opening communicating with the electrical chamber is provided on the upper end face of the box body 1. The surrounding plate 3 is installed around the pressure relief opening of the box body 1. The buffer bag 4 is cylindrical. The buffer bag 4 is made of flexible sealing and fire-resistant material. The lower end of the buffer bag 4 is hermetically connected to the inner wall of the surrounding plate 3. The buffer bag 4 is folded and stored in the surrounding plate 3. The upper end of the buffer bag 4 is connected to the lower end face of the top cover 5. The top cover 5 is placed on the upper port of the surrounding plate 3. It also includes a middle mounting frame 6, side mounting frames 7, a pressure relief plate 1 8 and a pressure relief plate 2 9. The middle mounting frame 6 is installed in the middle of the pressure relief opening of the box body 1. There are two side mounting frames 7, and the two side mounting frames 7 are installed on both sides of the pressure relief opening of the box body 1. The lower end faces of the middle mounting frame 6 and the side mounting frames 7 are both inclined. The pressure relief plate 1 8 is hinged on the middle mounting frame 6. The pressure relief plate 2 9 is hinged on the side mounting frames 7. When the pressure relief plate 1 8 and the pressure relief plate 2 9 are laid flat, the pressure relief opening of the box body 1 is closed. It also includes a plurality of insertion tubes 10, a plurality of tips 11, a plurality of sockets 12 and a plurality of fragile tubes 13. A plurality of insertion tubes 10 are installed on the lower end faces of the middle mounting frame 6 and the side mounting frames 7. Tips 11 are provided on the upper sides of the outer ends of the plurality of insertion tubes 10. A plurality of sockets 12 are installed on the lower end faces of the pressure relief plate 1 8 and the pressure relief plate 2 9. The plurality of sockets 12 and the plurality of insertion tubes 10 are respectively aligned. The two ends of the plurality of fragile tubes 13 are respectively inserted into the respectively aligned plurality of sockets 12 and plurality of insertion tubes 10. A fire extinguishing agent is stored in the plurality of fragile tubes 13. It also includes an annular groove 14. An annular groove 14 is provided around the outer walls of the plurality of fragile tubes 13. When the fragile tubes 13 are inserted into the insertion tubes 10 and the sockets 12, the annular groove 14 is located below the tip 11.

[0030] In the electrical chamber of the box body 1, a main control unit and multiple electrical control units are installed. In the normal state, the buffer bag 4 is folded and stored in the surrounding plate 3, and the top cover 5 covers the upper port of the surrounding plate 3, so the height is not increased much. The pressure relief plate one 8 and the pressure relief plate two 9 cooperate to close the pressure relief port of the box body 1, reducing the contact between the buffer bag 4 and gases such as air and ozone in the electrical chamber of the box body 1, thereby delaying oxidation and increasing the service life of the buffer bag 4. Fire extinguishing agents stored in the fragile tubes 13, such as dry ice, dry powder fire extinguishing agents, and oxygen-consuming powders, etc., when the pressure relief plate one 8 and the pressure relief plate two 9 close the pressure relief port of the box body 1, the two ends of the multiple fragile tubes 13 are respectively inserted into multiple insertion tubes 10 and multiple sockets 12, so that the multiple fragile tubes 13 are arranged on the pressure-bearing surface of the pressure relief port; when an explosion occurs in the electrical chamber of the box body 1, the pressure and smoke will blow open the pressure relief plate one 8 and the pressure relief plate two 9, causing the pressure relief port to open without affecting the pressure relief effect. The pressure relief plate one 8 and the pressure relief plate two 9 drive the multiple sockets 12 to turn upwards and open, while the multiple insertion tubes 10 remain stable, thereby breaking the multiple fragile tubes 13. During the process of breaking the multiple fragile tubes 13, the multiple tips 11 respectively pierce the upper walls of the multiple fragile tubes 13, so that the breaking effect of the multiple fragile tubes 13 is better. After the multiple fragile tubes 13 break, the fire extinguishing agents therein are sprayed downwards at the break to the electrical chamber of the box body 1 to extinguish the explosion and combustion part. The sublimation of dry ice can cool the electrical chamber of the box body 1 to avoid secondary explosion and improve safety. By setting the annular groove 14, the fragile tube 13 breaks at the annular groove 14, improving the breaking reliability of the fragile tube 13.

[0031] It further includes a bracket 15, a telescopic rod 16, a first spring 17, a support plate 18, a wedge block 19, a hook plate 20, a shrapnel 21, a piston 22, and a pressure relief pipe 23. The upper end of the bracket 15 is installed on the lower end surface of the top cover 5. The lower end of the telescopic rod 16 is connected to the bracket 15, and the upper end of the telescopic rod 16 is installed with the support plate 18. The lower end of the first spring 17 is connected to the bracket 15, and the upper end of the first spring 17 is connected to the support plate 18. A wedge block 19 is arranged on the side wall of the support plate 18. The hook plate 20 is elastically installed on the bracket 15, and a hook matching the wedge block 19 is arranged at the upper end of the hook plate 20. The shrapnel 21 is a thermosensitive metal sheet. The shrapnel 21 is in a disc shape at normal temperature and in a bowl shape when heated. The bottom of the shrapnel 21 is connected to the support plate 18, and the upper end edge of the shrapnel 21 is connected to the lower end of the piston 22. The pressure relief pipe 23 is installed through the top cover 5, and the piston 22 is aligned with the lower end of the pressure relief pipe 23. The piston 22 seals the pressure relief pipe 23.

[0032] In the normal state, the elastic force of spring 17 elongates the telescopic rod 16, pushing the support plate 18, the elastic sheet 21 and the piston 22 upward, causing the piston 22 to press against the lower end face of the pressure relief pipe 23 for sealing. The elastic sheet 21 is in the shape of a flat disc, and the wedge-shaped block 19 is located above the hook of the hook plate 20. When the hot flue gas from the explosion contacts the elastic sheet 21, the elastic sheet 21 expands due to heat and bulges downward, making the elastic sheet 21 into a convex bowl shape. The elastic sheet 21 pushes the support plate 18 and the wedge-shaped block 19 downward, causing the wedge-shaped block 19 to be hooked by the hook of the hook plate 20. When the explosion and fire inside the electrical chamber of the box body 1 are extinguished and the temperature drops, the elastic sheet 21 shrinks from the bowl shape to the disc shape, driving the piston 22 to descend. The piston 22 disengages from the pressure relief pipe 23, opening the pressure relief pipe 23. The low-temperature gas stored in the buffer bag 4 is discharged through the pressure relief pipe 23, and the top cover 5 and the buffer bag 4 fall back, balancing the internal and external pressures of the box body 1. At this time, the box door 2 can be opened to repair the inside of the box body 1.

[0033] Embodiment 2, as Figure 1 、 Figure 2 and Figure 9 shown. On the basis of Embodiment 1, it further includes channel steels 24, a plurality of sensor units 25 and a plurality of temperature sensors 26. At least two channel steels 24 are provided, and the channel steels 24 are installed on the top of the box body 1. A plurality of sensor units 25 are installed on the channel steels 24, and the plurality of sensor units 25 are arranged around the box body 1 evenly. A plurality of temperature sensors 26 are installed on each of the plurality of sensor units 25, and the plurality of temperature sensors 26 face the box body 1 at different angles.

[0034] Multiple temperature sensors 26 detect abnormal high temperatures and fire situations in the environment around the box body 1. When there is an abnormal high temperature or a fire in the environment, due to different orientations, the multiple temperature sensors 26 will generate detection signals of different intensities. Among them, the temperature sensor 26 that generates the strongest detection signal A points to the general direction of the abnormal high temperature or fire. The other multiple temperature sensors 26 with orientations similar to that of the temperature sensor 26 generating the strongest detection signal A generate sub-strong detection signals B, C, D,.... Calculate the ratios of the signal intensities of the multiple sub-strong detection signals to the signal intensity of the strongest detection signal, such as B / A, C / A, D / .... Virtualize the abnormal high temperature or fire heat source as a point P. The connection line between P and the temperature sensor 26 that generates the strongest detection signal A is the heat radiation line PA. The connection lines between P and the multiple temperature sensors 26 that generate sub-strong detection signals are the heat radiation lines PB, PC, PD,.... Let the angles between PB, PC, PD,.... and the perpendiculars to the receiving surfaces of the multiple temperature sensors 26 be ∠b, ∠c, ∠d,.... Then the above ratios B / A, C / A, D / .... are approximately equal to cosine(b), cosine(c), cosine(d),.... According to the inverse trigonometric function, the values of the above ∠b, ∠c, ∠d,.... can be obtained. And the relative positions and angles of the multiple temperature sensors 26 and the box body 1 are known, and the values of the angles ∠ab, ∠ac, ∠ad,.... between the orientation of the temperature sensor that generates the strongest detection signal A and the orientations of the temperature sensors that generate sub-strong detection signals B, C, D,.... are also known. Thus, the general position of point P is determined in reverse according to the values of the above ∠b, ∠c, ∠d,.... The more the number of signals participating in the detection, the more accurate the position of point P, realizing the positioning of the abnormal high temperature and fire positions in the environment.

[0035] It also includes a swing arm 27, a shaft rod 28, a first gear 29, a first motor 30, a second gear 31, and a gas storage unit 32. A transmitting tube is arranged at the movable end of the swing arm 27. The hinged end of the swing arm 27 is rotatably connected to the shaft rod 28. The shaft rod 28 is installed in the inner upper part of the groove of the channel steel 24. A first gear 29 is concentrically installed on the shaft rod 28. The first motor 30 is installed on the swing arm 27. The output shaft of the first motor 30 is concentrically installed with the second gear 31. The second gear 31 meshes with the first gear 29. The gas storage unit 32 is installed on the swing arm 27. The gas storage unit 32 is provided with a gas cylinder and a gas pipeline. The output end of the gas pipeline of the gas storage unit 32 is communicated with the transmitting tube of the swing arm 27.

[0036] The gas storage cylinder in the gas storage unit 32 stores high-pressure gas such as high-pressure carbon dioxide gas or high-pressure nitrogen for fire retardancy. The emission tube of the swing arm 27 stores the fire extinguishing agent. After multiple temperature sensors 26 cooperate to determine the abnormally high temperature and the location of the fire, the first motor 30 drives the second gear 31 to rotate. The reaction force of the second gear 31 meshing with the shaft rod 28 drives the swing arm 27 to rotate around the shaft rod 28, so that the emission tube of the swing arm 27 faces the direction of the abnormally high temperature and the fire. The gas pipeline of the gas storage unit 32 is opened to inject the high-pressure gas into the emission tube of the swing arm 27, and the fire extinguishing agent is sprayed towards the target area to extinguish the primary fire and improve safety.

[0037] It also includes multiple first storage barrels 33 and multiple second storage barrels 34. The emission tube of the swing arm 27 is filled with multiple first storage barrels 33 and second storage barrels 34. Multiple first storage barrels 33 store the fire extinguishing agent, and multiple second storage barrels 34 store emergency escape equipment. The first storage barrels 33 and the second storage barrels 34 are made of heat-melting materials. Multiple first storage barrels 33 and multiple second storage barrels 34 are sprayed into the area of abnormally high temperature and fire. Multiple first storage barrels 33 are heated and melted to cause the internal fire extinguishing agent to splash out for fire extinguishing. Multiple second storage barrels 34 are heated and melted to release emergency escape equipment such as heat insulation blankets and emergency masks therein. The staff in the working fire area can increase the chance of escape after obtaining these emergency escape equipment.

[0038] Embodiment 3, as Figure 1 、 Figure 2 and Figure 10 shown, on the basis of Embodiment 1, it further includes a bottom plate 35, a magnetic attraction block 36, a power connection module 37, a first inductor 38, a wire slot 39, an expansion module 40, a magnetic attraction seat 41 and a second inductor 42. The bottom plate 35 is installed on the side wall of the box body 1. Multiple magnetic attraction blocks 36 and a power connection module 37 are installed on the bottom plate 35. A first inductor 38 and a wire slot 39 are arranged on the power connection module 37. Multiple wiring terminals are installed at the bottom of the wire slot 39. Multiple magnetic attraction seats 41, a second inductor 42 and a wire insertion module 43 are arranged on the side wall of the expansion module 40. Multiple magnetic attraction seats 41 are respectively matched with multiple magnetic attraction blocks 36. The second inductor 42 is matched with the first inductor 38. The wire insertion module 43 is matched with the wire slot 39. Wire insertion terminals matched with multiple wiring terminals are arranged in the wire insertion module 43; It also includes a partition plate 44, a second spring 45 and a positioning rod 46. A horizontal slot is arranged in the middle of the wire slot 39. The inner end of the partition plate 44 is slidably inserted into the horizontal slot of the wire slot 39. The outer end of the partition plate 44 extends outside the power connection module 37. The two ends of the second spring 45 are respectively connected to the partition plate 44 and the power connection module 37. A positioning hole is arranged at the outer end of the partition plate 44. A positioning rod 46 is installed on the expansion module 40, and the positioning rod 46 is matched with the positioning hole of the partition plate 44.

[0039] According to actual needs, different functional units are built into the expansion module 40. When it is necessary to expand the functions of the box body 1, multiple magnetic suction seats 41 of the expansion module 40 are respectively inserted and magnetically fixed to multiple magnetic suction blocks 36. At this time, the wiring module 43 is inserted into the wiring slot 39, so that multiple wiring terminals are respectively electrically connected to multiple connection terminals. At the same time, the second inductor 42 and the first inductor 38 are used in combination with technologies such as electronic tags or NFC to identify identity information. The main control unit in the box body 1 determines whether to accept the expansion of the expansion module 40 according to the identity information. When the identity information is matched and confirmed, the functional unit of the expansion module 40 is connected to the main control unit of the box body 1, so as to temporarily expand the functions of the main control unit in the box body 1. There is no need to open the box door 2, which is more flexible and convenient. The elastic force of the second spring 45 pushes the partition plate 44 towards the inside of the wiring slot 39, so that the partition plate 44 closes the wiring slot 39, avoiding the connection terminals in the wiring slot 39 from generating electric sparks to the outside. When installing the expansion module 40, the wiring module 43 is inserted into the wiring slot 39 and abuts against the partition plate 44. When the partition plate 44 is pulled outwards in place, the adsorption force of multiple magnetic suction blocks 36 and multiple magnetic suction seats 41 automatically installs the expansion module 40 in place. At this time, the wiring terminals of the wiring module 43 are inserted into the connection terminals of the wiring slot 39, and at the same time, the positioning rod 46 is inserted into the positioning hole of the partition plate 44 to position the partition plate 44. Release the partition plate 44 to complete the expansion installation of the expansion module 40. When removing the expansion module 40, the positioning rod 46 is taken out from the positioning hole of the partition plate 44, and the elastic force of the second spring 45 pushes the partition plate 44 inwards to reset, so that the multiple connection terminals of the wiring slot 39 are not exposed throughout the process.

[0040] Such as Figures 1 to 10As shown in the figure, a multi-purpose explosion-proof control box of the present invention, when working, first, in the normal state, the buffer bag 4 is folded and stored in the surrounding plate 3, and the top cover 5 covers the upper port of the surrounding plate 3. The elastic force of the first spring 17 elongates the telescopic rod 16, pushing the support plate 18, the elastic sheet 21 and the piston 22 upward, so that the piston 22 presses against the lower end face of the pressure relief pipe 23 for sealing. The elastic sheet 21 is in the shape of a flat disc, and the wedge block 19 is located above the hook of the hook plate 20. After that, when an explosion occurs in the electrical chamber of the box body 1, the explosion pressure causes the first pressure relief plate 8 and the second pressure relief plate 9 to drive a plurality of sockets 12 to turn upward and open, while a plurality of insertion pipes 10 remain stable, thus breaking a plurality of fragile pipes 13. After the plurality of fragile pipes 13 are broken, the fire extinguishing agent therein sprays downward at the break to the electrical chamber of the box body 1 to extinguish the explosion and combustion part. Then, the explosion pressure rushes into the buffer bag 4 through the pressure relief port of the box body 1, so that the buffer bag 4 expands and stretches upward, and pushes the top cover 5 up from the surrounding plate 3, thereby increasing the effective volume of the electrical chamber of the box body 1. The increased volume can guide and absorb the explosion pressure, so that the pressure, smoke, etc. generated by the explosion are collected in the electrical chamber of the box body 1 and the buffer bag 4. When the hot smoke of the explosion contacts the elastic sheet 21, the elastic sheet 21 expands and bulges downward due to heat, making the elastic sheet 21 into a convex bowl shape. The elastic sheet 21 pushes the support plate 18 and the wedge block 19 downward, so that the wedge block 19 is hooked by the hook of the hook plate 20. Finally, when the explosion and fire inside the electrical chamber of the box body 1 are extinguished, the temperature drops, the elastic sheet 21 shrinks from the bowl shape to the disc shape, thereby driving the piston 22 to descend, and the piston 22 is separated from the pressure relief pipe 23, so that the pressure relief pipe 23 is opened, and the low-temperature gas stored in the buffer bag 4 is discharged through the pressure relief pipe 23. The top cover 5 and the buffer bag 4 fall back, and the internal and external pressures of the box body 1 are balanced. At this time, the box door 2 can be opened to repair the inside of the box body 1.

[0041] The main functions achieved by the present invention are:

[0042] 1. Guide and absorb the explosion pressure by increasing the effective volume, and collect the smoke to improve safety;

[0043] 2. Have a mechanical automatic pressure relief valve, automatically relieve pressure after the temperature drops, safe and reliable;

[0044] 3. Can release the fire extinguishing agent inward when an explosion occurs to extinguish the fire source in the box, with high safety;

[0045] 4. Can detect the fire situation in the external environment and extinguish the fire;

[0046] 5. Can launch emergency equipment to increase the chance of escape;

[0047] 6. Can be flexibly connected to an external expansion module to achieve versatility.

[0048] A multi-purpose explosion-proof control box of the present invention has common mechanical installation, connection, or setting methods, and any implementation method that can achieve its beneficial effects can be adopted; the box body 1, box door 2, buffer bag 4, pressure relief plate 1 8, pressure relief plate 2 9, fragile tube 13, fire extinguishing agent, telescopic rod 16, spring 1 17, elastic sheet 21, piston 22, pressure relief pipe 23, sensor unit 25, temperature sensor 26, gear 1 29, motor 1 30, gear 2 31, gas storage unit 32, storage barrel 1 33, storage barrel 2 34, bottom plate 35, magnetic attraction block 36, sensor 1 38, wire slot 39, magnetic attraction seat 41, sensor 2 42, wire plug-in module 43, and spring 2 45 of the multi-purpose explosion-proof control box of the present invention are purchased on the market, and technicians in this industry only need to install and operate according to the attached operation manual, without the need for technicians in this field to perform creative labor.

[0049] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multi-purpose explosion-proof control box, comprising a box body (1) and a box door (2). An electrical chamber is arranged inside the box body (1). An inspection opening communicating with the electrical chamber is arranged on the front end face of the box body (1). The box door (2) is installed on the inspection opening; it is characterized in that, It further includes a surrounding plate (3), a buffer bag (4) and a top cover (5). A pressure relief opening communicating with the electrical chamber is provided on the upper end surface of the box body (1). The surrounding plate (3) is installed around the pressure relief opening of the box body (1). The buffer bag (4) is cylindrical and made of a flexible, sealed and fire-resistant material. The lower end of the buffer bag (4) is hermetically connected to the inner wall of the surrounding plate (3). The buffer bag (4) is folded and stored in the surrounding plate (3). The upper end of the buffer bag (4) is connected to the lower end surface of the top cover (5). The top cover (5) is placed on the upper port of the surrounding plate (3). It further includes a bracket (15), a telescopic rod (16), a first spring (17), a support plate (18), a wedge block (19), a hook plate (20), a shrapnel (21), a piston (22) and a pressure relief pipe (23). The upper end of the bracket (15) is installed on the lower end surface of the top cover (5). The lower end of the telescopic rod (16) is connected to the bracket (15). The upper end of the telescopic rod (16) is installed with the support plate (18). The lower end of the first spring (17) is connected to the bracket (15). The upper end of the first spring (17) is connected to the support plate (18). A wedge block (19) is provided on the side wall of the support plate (18). The hook plate (20) is elastically installed on the bracket (15). The upper end of the hook plate (20) is provided with a hook matching the wedge block (19). The shrapnel (21) is a thermosensitive metal sheet. The shrapnel (21) is disc-shaped at normal temperature and bowl-shaped when heated. The bottom of the shrapnel (21) is connected to the support plate (18). The upper end edge of the shrapnel (21) is connected to the lower end of the piston (22). The pressure relief pipe (23) is installed through the top cover (5). The piston (22) is aligned with the lower end of the pressure relief pipe (23). The piston (22) seals the pressure relief pipe (23).

2. The multi-purpose explosion-proof control box according to claim 1, characterized in that, It further includes a middle mounting frame (6), side mounting frames (7), a first pressure relief plate (8) and a second pressure relief plate (9). The middle mounting frame (6) is installed in the middle of the pressure relief opening of the box body (1). There are two side mounting frames (7), and the two side mounting frames (7) are installed on both sides of the pressure relief opening of the box body (1). The lower end surfaces of the middle mounting frame (6) and the side mounting frames (7) are both inclined. The first pressure relief plate (8) is hinged on the middle mounting frame (6). The second pressure relief plate (9) is hinged on the side mounting frames (7). When the first pressure relief plate (8) and the second pressure relief plate (9) are laid flat, the pressure relief opening of the box body (1) is closed.

3. The multi-purpose explosion-proof control box according to claim 2, wherein, It further includes a plurality of insertion tubes (10), a plurality of tips (11), a plurality of sockets (12) and a plurality of fragile tubes (13). A plurality of insertion tubes (10) are installed on the lower end surfaces of the middle mounting frame (6) and the side mounting frames (7). Tips (11) are provided on the upper sides of the outer ends of the plurality of insertion tubes (10). A plurality of sockets (12) are installed on the lower end surfaces of the first pressure relief plate (8) and the second pressure relief plate (9). The plurality of sockets (12) and the plurality of insertion tubes (10) are respectively aligned. The two ends of the plurality of fragile tubes (13) are respectively inserted into the respectively aligned plurality of sockets (12) and plurality of insertion tubes (10). A fire extinguishing agent is stored in the plurality of fragile tubes (13).

4. A multi-purpose explosion-proof control box according to claim 3, characterized in that, It further includes an annular groove (14), and the outer walls of a plurality of frangible tubes (13) are all provided with the annular groove (14). When the frangible tubes (13) are inserted into the insertion tube (10) and the socket (12), the annular groove (14) is located below the tip (11).

5. A multi-purpose explosion-proof control box according to claim 1, characterized in that, It further includes channel steels (24), a plurality of sensor units (25) and a plurality of temperature sensors (26). At least two channel steels (24) are provided, and the channel steels (24) are installed on the top of the box body (1). A plurality of sensor units (25) are installed on the channel steels (24), and the plurality of sensor units (25) are evenly arranged around the box body (1). A plurality of temperature sensors (26) are installed on the plurality of sensor units (25), and the plurality of temperature sensors (26) face different angles of the box body (1) respectively.

6. The multi-purpose explosion-proof control box according to claim 5, characterized in that, It further includes a swing arm (27), a shaft rod (28), a first gear (29), a first motor (30), a second gear (31) and a gas storage unit (32). A transmitting tube is arranged at the movable end of the swing arm (27). The hinged end of the swing arm (27) is rotatably connected to the shaft rod (28). The shaft rod (28) is installed in the groove of the channel steel (24). The first gear (29) is concentrically installed on the shaft rod (28). The first motor (30) is installed on the swing arm (27). The output shaft of the first motor (30) is concentrically installed with the second gear (31). The second gear (31) meshes with the first gear (29). The gas storage unit (32) is installed on the swing arm (27). The gas storage unit (32) is provided with a gas storage cylinder and a gas pipeline. The output end of the gas pipeline of the gas storage unit (32) is communicated with the transmitting tube of the swing arm (27).

7. The multi-purpose explosion-proof control box according to claim 6, characterized in that, It further includes a plurality of first storage barrels (33) and a plurality of second storage barrels (34). The plurality of first storage barrels (33) and the second storage barrels (34) are loaded in the transmitting tube of the swing arm (27). A fire extinguishing agent is stored in the plurality of first storage barrels (33), and emergency escape equipment is stored in the plurality of second storage barrels (34). The first storage barrels (33) and the second storage barrels (34) are made of a thermoplastic material.

8. A multi-purpose explosion-proof control box according to claim 1, characterized in that, It further includes a bottom plate (35), a magnetic attraction block (36), a power connection module (37), a first inductor (38), a wire slot (39), an expansion module (40), a magnetic attraction seat (41) and a second inductor (42). The bottom plate (35) is installed on the side wall of the box body (1). A plurality of magnetic attraction blocks (36) and the power connection module (37) are installed on the bottom plate (35). The first inductor (38) and the wire slot (39) are arranged on the power connection module (37). A plurality of wiring terminals are installed at the bottom of the wire slot (39). A plurality of magnetic attraction seats (41), the second inductor (42) and a wire insertion module (43) are arranged on the side wall of the expansion module (40). The plurality of magnetic attraction seats (41) are respectively matched with the plurality of magnetic attraction blocks (36). The second inductor (42) is matched with the first inductor (38). The wire insertion module (43) is matched with the wire slot (39). Wire insertion terminals matched with the plurality of wiring terminals are arranged in the wire insertion module (43).

9. The multi-purpose explosion-proof control box according to claim 8, characterized in that, It further includes a partition board (44), a second spring (45) and a positioning rod (46). A horizontal slot is provided in the middle of the wire slot (39). The inner end of the partition board (44) is slidably inserted into the horizontal slot of the wire slot (39). The outer end of the partition board (44) extends out of the external part of the power connection module (37). The two ends of the second spring (45) are respectively connected to the partition board (44) and the power connection module (37). A positioning hole is provided at the outer end of the partition board (44). A positioning rod (46) is installed on the expansion module (40), and the positioning rod (46) is matched with the positioning hole of the partition board (44).

Images