Explosion-proof electrical control cabinet

Abstract

The invention discloses an explosion-proof electrical control cabinet, and relates to the technical field of electrical cabinets, the control cabinet comprises a base, a cabinet body is arranged above the base, an alarm assembly is arranged at the top of the cabinet body, a plurality of ventilation holes are formed in the bottom of an inner cavity of the cabinet body, and a ventilation assembly is arranged in an inner cavity of the base; a refrigeration assembly is arranged below the ventilation assembly, an inner cavity of the cabinet body is communicated with the refrigeration assembly through ventilation holes and the ventilation assembly, the refrigeration assembly comprises two connecting pieces, and a plurality of thermal bimetallic strips are arranged at the bottom of each connecting piece in a linear array mode. Through the arrangement of the thermal bimetallic strip and the ventilation assembly, gas in the cabinet body enters the refrigeration assembly from one side, on one hand, dual heat dissipation is performed on the gas in the cabinet body through the thermal bimetallic strip and the refrigeration piece, and on the other hand, the thermal bimetallic strip is deformed according to the temperature of the gas and pushes the sliding piece to move, so that the heat dissipation area is expanded, and the heat dissipation efficiency is improved. Therefore, the device can adaptively adjust the heat dissipation effect according to the temperature of the gas.

Description

Technical Field

[0001] The invention relates to the technical field of electrical cabinets, in particular to an explosion-proof electrical control cabinet. Background Art

[0002] With the rapid development of industrial automation, especially in high-risk industries such as petroleum, chemical, and coal, preventing accidents such as sparks and explosions has become a top priority. The explosion-proof electrical control box uses special materials and designs to effectively isolate and protect electrical components in dangerous environments, thereby greatly reducing the probability of explosion accidents.

[0003] A Chinese patent with application number 202011114892X discloses an outdoor explosion-proof vertical electrical control cabinet with a built-in heat dissipation protection structure, including a shell, a mounting plate, a dust cover, a heat dissipation pipe and a fan. A cabinet door is installed on the left side of the shell through a hinge, and a radiator is installed on the top of the shell, and a wire management box is installed on the lower inner side of the shell. Heat dissipation holes are opened on the back of the shell, and a back plate is installed at the rear of the shell. Heat pipes are installed around the mounting plate through ring buckles, and a one-way valve is installed at the end of the heat pipe. A mounting hole groove is opened on the mounting plate, and the conduit is connected to the liquid inlet and the liquid outlet.

[0004] Chinese patent application number 202220203736.9 discloses a combined heat dissipation explosion-proof electrical cabinet, including a motor, one side of the motor is fixedly connected to a ventilation device, and one side of the ventilation device is fixedly connected to an air pipe; through the structural design of the motor, the ventilation device, the air pipe, the docking port, the filter, the connecting rod and the heat dissipation port, by opening the motor, the output end of the motor transmits the ventilation device through the coupling, so that the ventilation device works, and the ventilation device absorbs and dissipates the airflow in each placement groove through the docking port of the air pipe, and can also achieve the effect of heat dissipation, and at the same time, some floccules in the placement groove are isolated through the filter, and at the same time, the heat dissipation port can also dissipate the heat generated when the electrical appliance is working, realizing the function of efficient heat dissipation, solving the problem that the explosion-proof electrical cabinet is affected by the low heat dissipation efficiency, and improving the working efficiency of the explosion-proof electrical cabinet.

[0005] Based on the above-mentioned prior art, it can be known that in order to improve the heat dissipation effect of the explosion-proof electrical control cabinet, a ventilation device is usually arranged on the electrical cabinet to dissipate the heat of the electrical cabinet. However, since the explosion-proof electrical cabinet must be isolated from the outside gas when in use, the setting of the ventilation device will cause some outside gas to enter the interior of the electrical cabinet, causing the explosion-proof electrical cabinet to lose its flameproof capability. At the same time, when the explosion-proof electrical cabinet is dissipating the heat, if a fire or explosion occurs inside the electrical cabinet, the ventilation device will cause the fire source to spread to the surroundings under the action of wind, which is not conducive to the use of the explosion-proof electrical cabinet.

[0006] Although sensors and other detection components can be installed in the explosion-proof electrical cabinet to detect whether a fire or explosion has occurred in the cabinet by measuring the temperature inside the cabinet, the electrical cabinet itself will also emit heat when in use, and the heat dissipation is affected by factors such as the power of the electrical cabinet and the external environment. Therefore, it is impossible to effectively identify the condition inside the cabinet by only using the detection components without opening the cabinet, which is not conducive to the normal operation of the explosion-proof electrical cabinet.

[0007] Therefore, it is necessary to invent an explosion-proof electrical control cabinet to solve the above problems. Summary of the invention

[0008] The purpose of the present invention is to provide an explosion-proof electrical control cabinet to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an explosion-proof electrical control cabinet, comprising a base, a cabinet body is arranged above the base, an alarm assembly is arranged on the top of the cabinet body, a plurality of ventilation holes are opened at the bottom of the inner cavity of the cabinet, and a ventilation assembly is arranged in the inner cavity of the base; a refrigeration assembly is arranged below the ventilation assembly, and the inner cavity of the cabinet is connected with the refrigeration assembly through the ventilation holes and the ventilation assembly, and the refrigeration assembly comprises two connecting parts, and a plurality of thermal bimetallic strips are arranged in a linear array at the bottom of each connecting part, and a pushing part is fixedly connected to the bottom of a side with a low expansion coefficient of each thermal bimetallic strip, a sliding part is arranged at the other end of the pushing part, and a refrigeration sheet is arranged on the sliding part, and sealing parts for closing the ventilation assembly are respectively arranged at both ends of the two connecting parts close to the ventilation assembly.

[0010] Preferably, the refrigeration component further comprises a refrigeration bin, which is fixedly mounted inside the base, and two baffles are respectively fixedly connected at both ends of the refrigeration bin close to the ventilation component, and the sliding member is slidably connected to the two baffles.

[0011] Preferably, the seal includes a sealing end and a connecting end, the sealing ends of the two seals are both in contact with the top of the inner cavity of the refrigeration warehouse, one side of the connecting end of the two seals is connected to the connecting piece, and the other side is connected to the sealing end of the seal, and the connecting ends of the two adjacent seals are staggered up and down.

[0012] Preferably, one end of the pushing member away from the thermal bimetallic strip is hinged with a sliding block, and the sliding block is slidably connected to the sliding member.

[0013] Preferably, the ventilation assembly includes two ventilation grooves, which are arranged on the top of the base and pass through the top of the base and are connected to the ventilation holes. An air collecting bin is fixedly connected below the ventilation groove, and an air pump is fixedly installed in one of the air collecting bins. The air in the cabinet is drawn into the refrigeration assembly through the air pump, and the gas is sent into the cabinet through the other air collecting bin.

[0014] Preferably, a connecting pipe is fixedly installed at the bottom of each gas collecting bin, one end of the connecting pipe away from the gas collecting bin extends into the refrigeration assembly, and the radius of the connecting pipe is smaller than the width of the seal. When the two seals are in contact with each other, the connecting pipe will be blocked.

[0015] Preferably, two legs are fixedly connected to both sides of the bottom of the base, a mounting frame is fixedly connected to the inside of the cabinet, a plurality of electrical components are arranged on the mounting frame, a cabinet door is movably connected to one side of the cabinet, a plurality of electrical switches are arranged in an array on the cabinet door, and the plurality of electrical switches are electrically connected to the electrical components.

[0016] Preferably, a sealing strip is fixedly installed around one side of the cabinet door close to the inner cavity of the cabinet. When the cabinet door is rotated to fit together with the cabinet, the gap between the cabinet and the cabinet door is filled and sealed by the sealing strip. A plurality of electromagnetic plugs are fixedly connected around one end of the cabinet door close to the cabinet, and a plurality of sockets compatible with the electromagnetic plugs are provided in the cabinet.

[0017] Preferably, the alarm assembly includes a detection platform, the top of which is fixedly connected to an alarm light, and one side of the detection platform is fixedly connected to an exhaust pipe. Preferably, the side of the exhaust pipe away from the detection platform passes through the cabinet and extends into the inner cavity of the cabinet, and a temperature sensor and an exhaust device are provided in the detection platform.

[0018] Technical effects and advantages of the present invention: 1. The present invention allows the gas in the cabinet to enter the refrigeration component from one side through the arrangement of the thermal bimetallic strip and the ventilation component. On the one hand, the gas in the cabinet is doubly cooled by the thermal bimetallic strip and the refrigeration sheet. On the other hand, the thermal bimetallic strip is deformed according to the temperature of the gas and pushes the sliding part to move, thereby expanding the heat dissipation area, so that the device can adaptively adjust the heat dissipation effect according to the temperature of the gas.

[0019] 2. The present invention is provided with devices such as thermal bimetal strips and seals. When a fire or explosion occurs in the cabinet, the temperature of the gas in the cabinet rises instantaneously and expands. According to the characteristics of the thermal bimetal strip, the instantaneously expanded gas pushes the sliding member to move, thereby driving the thermal bimetal strip as a whole to slide in the reverse direction and driving the seal to move. On the one hand, the expansion gas generated by the explosion or fire is depressurized by the setting of a refrigeration bin to prevent the cabinet door from being broken due to excessive air pressure in the cabinet and causing a secondary fire or explosion. On the other hand, the cabinet is sealed after the pressure relief is completed by the setting of the seal to prevent the gas flow in the cabinet from spreading to the surroundings, and at the same time, the cabinet is flame-retarded and fire-extinguished. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of another state structure of the overall structure of the present invention; Figure 3 It is a schematic diagram of the half-section structure inside the cabinet of the present invention; Figure 4 It is a schematic diagram of a half-section structure of a ventilation assembly of the present invention; Figure 5 It is a schematic diagram of the exploded structure of the refrigeration component of the present invention; Figure 6 It is a schematic diagram of the explosion structure of the connecting piece and the thermal bimetal plate of the present invention; Figure 7 It is a schematic diagram of the connection structure between the pusher and the sliding member of the present invention; Figure 8 It is a schematic diagram of the connection between the pusher and the sliding block of the present invention.

[0021] In the figure: 1. base; 2. cabinet; 21. mounting frame; 22. cabinet door; 23. electrical switch; 24. ventilation hole; 25. sealing strip; 3. support leg; 4. alarm component; 41. test table; 42. alarm light; 43. exhaust pipe; 5. ventilation component; 51. ventilation trough; 52. air collecting bin; 53. connecting pipe; 6. refrigeration component; 61. connecting piece; 62. thermal bimetallic strip; 63. refrigeration bin; 64. pushing piece; 65. sliding piece; 66. sealing piece; 67. baffle plate; 68. sliding block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1-2 As shown, the first embodiment of the present invention provides an explosion-proof electrical control cabinet, including a base 1, a cabinet body 2 is arranged above the base 1, and an alarm component 4 is arranged on the top of the cabinet body 2. By arranging the alarm component 4 on the cabinet body 2, the internal situation of the explosion-proof electrical control cabinet can be monitored in real time. When high temperature or fire and explosion occur in the cabinet body 2, an alarm is sounded through the alarm component 4 to prompt the construction personnel.

[0024] In this embodiment, the alarm component 4 includes a detection platform 41, and an alarm light 42 is fixedly connected to the top of the detection platform 41. An exhaust pipe 43 is fixedly connected to one side of the detection platform 41. The exhaust pipe 43 penetrates the cabinet 2 and extends into the inner cavity of the cabinet 2 on the side away from the detection platform 41. A temperature sensor and a ventilation device are provided in the detection platform 41. By arranging the temperature sensor and the ventilation device in the detection platform 41, when it is necessary to detect the situation in the cabinet 2, the ventilation device is controlled to work, and the gas in the cabinet 2 is first drawn into the detection platform 41 through the exhaust pipe 43, and the temperature in the cabinet 2 is detected by the temperature sensor arranged in the detection platform 41. At this time, if the detected temperature is within the preset range, it means that no fire or explosion has occurred in the cabinet 2. If the detected temperature is higher than the preset range, it means that a fire or explosion has occurred in the cabinet 2. In this state, the construction personnel are reminded by controlling the alarm light 42 above the detection platform 41.

[0025] When the inspection bench 41 completes the inspection of the cabinet 2, the ventilation device is controlled to work in reverse, and the gas extracted from the cabinet 2 is transmitted back to the cabinet 2 through the exhaust pipe 43, so that the air pressure in the cabinet 2 is always within a normal range, thereby preventing the air pressure in the cabinet 2 from being too low, causing external gas to be sucked into the cabinet 2 under the action of air pressure and causing fire or explosion.

[0026] like Figure 2 As shown, based on the explosion-proof electrical control cabinet of the above embodiment, in another embodiment of the present invention, two legs 3 are fixedly connected to both sides of the bottom of the base 1, a mounting frame 21 is fixedly connected to the inside of the cabinet 2, and a plurality of electrical components are arranged on the mounting frame 21, a cabinet door 22 is movably connected to one side of the cabinet 2, and a plurality of electrical switches 23 are arranged in an array on the cabinet door 22, and the plurality of electrical switches 23 are electrically connected to the electrical components, and the two legs 3 are fixedly connected to the bottom of the base 1, so that the base 1 and the cabinet 2 are separated from the ground, and the problem of ground moisture infiltrating into the cabinet 2 after the device is placed for a long time is effectively avoided, and the legs 3 can be set as a telescopic structure, so that the length of the legs 3 can be adjusted according to the use requirements.

[0027] Based on the explosion-proof electrical control cabinet of the above embodiment, in another embodiment of the present invention, a sealing strip 25 is fixedly installed around one side of the cabinet door 22 close to the inner cavity of the cabinet body 2. When the cabinet door 22 is rotated to fit together with the cabinet body 2, the gap between the cabinet body 2 and the cabinet door 22 is filled and sealed by the sealing strip 25. A plurality of electromagnetic plugs are fixedly connected around one end of the cabinet door 22 close to the cabinet body 2. A plurality of sockets compatible with the electromagnetic plugs are provided in the cabinet body 2. By fixing the sealing strip 25 on the cabinet door 22 and arranging a plurality of electromagnetic plugs on the cabinet door 22, when the cabinet door 22 and the cabinet body 2 fit together, the cabinet door 22 and the cabinet body 2 are first locked by the electromagnetic plugs, and then the inner cavity of the cabinet body 2 forms a sealed area through the cooperation of the arranged sealing strip 25 and the cabinet door 22, thereby preventing the external flammable and explosive gas, dust or liquid from entering the cabinet body 2 and causing fire or explosion.

[0028] When in use, the locking and opening of the cabinet door 22 and the cabinet body 2 are controlled by the electromagnetic latch arranged on the cabinet door 22, and the inner cavity of the cabinet body 2 in the closed state is sealed by the sealing strip 25 arranged on the cabinet door 22 to isolate it from the external gas. At the same time, through the setting of multiple electrical switches 23, the cabinet door 22 can also control the electrical components in the cabinet body 2 without opening.

[0029] Based on the explosion-proof electrical control cabinet of the above embodiment, in another embodiment of the present invention, a plurality of ventilation holes 24 are opened at the bottom of the inner cavity of the cabinet 2, a ventilation component 5 is provided in the inner cavity of the base 1, and a refrigeration component 6 is provided below the ventilation component 5. The inner cavity of the cabinet 2 is connected with the refrigeration component 6 through the ventilation holes 24 and the ventilation component 5. By opening a plurality of ventilation holes 24 at the bottom of the cabinet 2 and connecting the inner cavity of the cabinet 2 with the refrigeration component 6 through the ventilation component 5 and the ventilation holes 24, the temperature of the inner cavity of the cabinet 2 is adjusted through the refrigeration component 6, so that the internal temperature of the cabinet 2 is always within a preset range, thereby avoiding the problem that multiple electrical components in the cabinet 2 cannot work normally due to excessively high or low temperatures.

[0030] like Figure 3As shown, in the present embodiment, the ventilation assembly 5 includes two ventilation grooves 51, the ventilation grooves 51 are arranged on the top of the base 1 and the ventilation grooves 51 pass through the top of the base 1 and are connected to the ventilation holes 24, and an air collecting bin 52 is fixedly connected below the ventilation grooves 51, and an air pump is fixedly installed in one of the air collecting bins 52, and the air in the cabinet 2 is sucked into the refrigeration assembly 6 through the air pump, and the gas is sent into the cabinet 2 through the other air collecting bin 52. For the convenience of description, the air pump installed in the left air collecting bin 52 is used as an example for explanation. When the ventilation assembly 5 starts to work, the cabinet is sucked into the refrigeration assembly 6 by controlling the air pump in the left air collecting bin 52. The gas in the cabinet 2 is sucked into the left gas collecting bin 52 by the suction force of the vacuum pump and is transmitted to the refrigeration assembly 6 arranged below the gas collecting bin 52. At this time, since the gas continuously enters the refrigeration assembly 6 from the cabinet 2 through the left gas collecting bin 52, the gas in the refrigeration assembly 6 is pushed to move to the right, and moves into the cabinet 2 through the gas collecting bin 52 arranged on the right side of the refrigeration assembly 6, so that the cooled gas is discharged into the cabinet 2, and the vacuum pump in the left gas collecting bin 52 continues to operate, so that the gas in the cabinet 2 is unidirectionally circulated through the refrigeration assembly 6, thereby regulating the temperature in the cabinet 2.

[0031] like Figure 4 As shown, in this embodiment, the refrigeration component 6 includes two connecting members 61, and a plurality of thermal bimetallic sheets 62 are arranged in a linear array at the bottom of each connecting member 61. A pusher 64 is fixedly connected to the bottom of one side of each thermal bimetallic sheet 62 with a low expansion coefficient, and a sliding member 65 is arranged at the other end of the pushing member 64, and a refrigeration sheet is arranged on the sliding member 65. The two ends of the two connecting members 61 close to the ventilation component 5 are respectively provided with sealing members 66 for closing the ventilation component 5. By arranging a plurality of thermal bimetallic sheets 62 at the bottom of each connecting member 61 and expanding the thermal bimetallic sheets 62, the refrigeration component 5 is closed. The side with a lower coefficient is fixedly connected to the pushing member 64. When the temperature in the refrigeration component 6 gradually increases, the two ends of the thermal bimetallic strip 62 are deformed to different degrees due to the heat. At this time, the end of the thermal bimetallic strip 62 with a higher thermal expansion coefficient expands more than the end with a lower thermal expansion coefficient, so that the thermal bimetallic strip 62 as a whole bends toward the end with a lower thermal expansion coefficient, and pushes the pushing member 64 arranged here to push the sliding member 65 to move away from the thermal bimetallic strip 62, thereby expanding the refrigeration area of ​​the refrigeration plate and effectively cooling the high-temperature gas.

[0032] It should be noted that in order to improve the deformation effect of the thermal bimetallic strip 62, the active layer and the passive layer of the thermal bimetallic strip 62 can be made of composite materials composed of two or more metals or other materials with suitable properties and large differences in expansion coefficients. At the same time, the thickness and size of the active layer and the passive layer can be set to meet the usage requirements.

[0033] In this embodiment, the seal 66 includes a sealing end and a connecting end. The sealing ends of the two seals 66 are both in contact with the top of the inner cavity of the refrigeration bin 63. One side of the connecting end of the two seals 66 is connected to the connecting member 61, and the other side is connected to the sealing end of the seal 66. The connecting ends of two adjacent seals 66 are staggered up and down. By arranging the connecting ends of the two seals 66 to be staggered up and down, the two seals 66 will not interfere with each other during movement. At the same time, by making the sealing ends of the two seals 66 in contact with the top of the inner cavity of the refrigeration bin 63, the sealing effect of the seal 66 is improved.

[0034] It should be noted that the connection end of the seal 66 is arranged in a midline area close to the length direction of the refrigeration bin 63 , and the sealing end of the seal 66 is arranged in a side area away from the length direction of the refrigeration bin 63 .

[0035] In this embodiment, a sliding block 68 is hinged at one end of the pushing member 64 away from the thermal bimetallic strip 62, and the sliding block 68 is slidably connected to the sliding member 65. By arranging the sliding block 68 on one side of the pushing member 64 and arranging a sliding groove compatible with the sliding block 68 on the sliding member 65, when the thermal bimetallic strip 62 is heated and bent, the thermal bimetallic strip 62 will drive the pushing member 64 to move. At this time, the pushing member 64 will push the sliding member 65 to slide through the sliding block 68. Through the setting of the sliding block 68, the problem of the sliding member 65 and the pushing member 64 being stuck in each other's limit position, resulting in the inability of the sliding member 65 to slide, is effectively avoided.

[0036] like Figure 5-8 As shown, in the present embodiment, a connecting pipe 53 is fixedly installed at the bottom of each gas collecting bin 52, and one end of the connecting pipe 53 away from the gas collecting bin 52 extends into the refrigeration assembly 6, and the radius of the connecting pipe 53 is smaller than the width of the sealing member 66. When the two sealing members 66 are in contact with each other, the connecting pipe 53 will be blocked. By staggering the two sealing members 66 and connecting them with two connecting members 61, when an explosion or fire occurs in the cabinet 2, the gas in the cabinet 2 will expand rapidly due to the heat and enter the refrigeration assembly 6 through the connecting pipe 53, thereby pushing the two connecting members 61 away from each other. At this time, the two connecting members 61 will drive the two sealing members 66 to approach each other and seal the connecting pipe 53, so that the gas in the cabinet 2 cannot flow into the refrigeration assembly 6, preventing the fire from spreading to the surroundings through wind force. At the same time, the cabinet 2 is sealed by the sealing member 66, effectively preventing air from entering the cabinet 2, thereby achieving fire extinguishing inside the cabinet 2.

[0037] Based on the explosion-proof electrical control cabinet of the above embodiment, in another embodiment of the present invention, the refrigeration component 6 also includes a refrigeration bin 63, which is fixedly installed inside the base 1, and two baffles 67 are fixedly connected to the two ends of the refrigeration bin 63 near the ventilation component 5, and the sliding member 65 is slidably connected to the two baffles 67. By arranging baffles 67 on both sides of the refrigeration bin 63 and slidably connecting the sliding member 65 with the two baffles 67, the interior of the refrigeration bin 63 is divided into a central refrigeration area and ventilation areas symmetrically arranged on both sides of the refrigeration area. When the vacuum pump in the left air collecting bin 52 is continuously operated to make the gas in the cabinet 2 circulate unidirectionally through the refrigeration component 6, the gas in the cabinet 2 will first enter the ventilation area on the left, and move to the central refrigeration area under the impetus of the air flow, and finally be discharged back into the cabinet 2 from the ventilation area on the right, so that the gas in the cabinet 2 flows back into the cabinet 2 through the refrigeration of the refrigeration area, so that the temperature in the cabinet 2 is always maintained within a preset range.

[0038] When in use, first, the vacuum operation is carried out through the vacuum pump arranged in the air collecting bin 52 on the bottom side of the cabinet 2, and the gas in the cabinet 2 is pumped into the ventilation area in the refrigeration bin 63 through the air collecting bin 52 and the connecting pipe 53, and the continuous operation of the vacuum pump makes the gas entering the ventilation area later push the gas entering the ventilation area earlier to flow into the refrigeration area in the middle of the refrigeration bin 63, and the gas is cooled by the refrigeration plate arranged on the sliding part 65, and then the gas is transmitted to the cabinet 2 through another air collecting bin 52 and the connecting pipe 53, so as to realize the regulation of the temperature in the cabinet 2 in a closed environment, and effectively solves the problem of external heat dissipation in the prior art causing external gas to enter the cabinet 2, thereby making the device explosion-proof.

[0039] Secondly, when the gas in the cabinet 2 enters the refrigeration bin 63 through the gas collecting bin 52 and the connecting pipe 53 for heat exchange, the gas contacts the high-temperature gas through the multiple thermal bimetallic strips 62 arranged in the refrigeration area. At this time, on the one hand, the high-temperature gas is subjected to a first-order heat exchange through the thermal bimetallic strips 62, thereby reducing the temperature of the high-temperature gas. On the other hand, the gas is blocked by the thermal bimetallic strips 62, thereby extending the time for the gas to pass through the refrigeration area, thereby further improving the heat dissipation effect of the device on the gas. At the same time, since a pushing member 64 is provided on the side of the thermal bimetallic strip 62 with a lower expansion coefficient, when the thermal bimetallic strip 62 is heated and bends toward the side with a lower expansion coefficient, the thermal bimetallic strip 62 will drive the pushing member 64 to move. By arranging a sliding block 68 on the pushing member 64, when the pushing member 64 moves with the deformation of the thermal bimetallic strip 62, the sliding block 68 will push the sliding member 65 to slide in a direction away from the thermal bimetallic strip 62, thereby expanding the refrigeration area, and the gas in this area is subjected to a second-order heat dissipation through the refrigeration sheet arranged on the sliding member 65.

[0040] It should be noted that since the deformation degree of the thermal bimetallic strip 62 is proportional to the gas temperature, that is, the higher the gas temperature, the greater the deformation degree of the thermal bimetallic strip 62, the longer the distance that the thermal bimetallic strip 62 pushes the sliding member 65 to slide, and the larger the range of the refrigeration area, if the gas temperature is within the preset range, the gas temperature at this time is not enough to cause the thermal bimetallic strip 62 to deform, and the refrigeration component 6 performs normal cooling of the gas. However, when the gas temperature increases with the continuous use or overclocking of the electrical control cabinet, the temperature inside the gas will gradually increase. At this time, the thermal bimetallic strip 62 will continuously absorb heat and deform, thereby improving the heat dissipation effect on the gas, so that the temperature inside the electrical control cabinet is always maintained within the preset range. The problem of adaptively adjusting the electrical control cabinet by the thermal bimetallic strip 62 effectively avoids the problem of adding too many electrical components in the distribution cabinet, which leads to the problem of increased temperature in the distribution cabinet.

[0041] Again, when a fire or explosion occurs in the distribution cabinet, the temperature of the gas in the cabinet 2 will rise instantaneously, and the gas will expand due to the heat. In this state, since there is only an air pump in a single air collecting bin 52, and the two air collecting bins 52 are connected to the refrigeration assembly 6 and the cabinet 2, when the gas in the cabinet 2 expands due to the explosion or fire, the air pressure in the cabinet 2 will be greater than the air pressure in the refrigeration assembly 6, thereby pressing the excess gas into the refrigeration assembly 6. On the one hand, the pressure of the gas inside the cabinet 2 is relieved by the setting of the refrigeration assembly 6, so that when the gas pressure inside the cabinet 2 is too high and the cabinet door 22 is broken, the fire source comes into contact with the outside gas, causing a secondary fire or explosion. On the other hand, when the expanded heated gas enters the refrigeration assembly 6 through the air collecting bin 52, the gas flows into the refrigeration bin 63 through the two air collecting bins 52 at the same time under the action of the air pressure, and the hot bimetallic strip 62 arranged in the refrigeration bin 63 absorbs the gas. It takes a certain amount of time for heat to cause deformation, so the thermal bimetallic strip 62 cannot instantly absorb heat and deform to increase the area of ​​the refrigeration zone. At this time, the sliding member 65 will be pushed to move to both sides under the extrusion of the gas, thereby driving the pushing member 64 set on the sliding member 65 to pull the thermal bimetallic strip 62 to move, so that the two connecting members 61 are away from each other. In this process, the two connecting members 61 will simultaneously drive the sealing members 66 set at both ends thereof to approach each other in the refrigeration bin 63 and seal the connecting pipe 53, so that the gas in the cabinet 2 cannot continue to be discharged into the refrigeration bin 63. On the one hand, the gas in the cabinet 2 remains in a relatively static state to prevent the fire from spreading to the surroundings under the flow of gas. On the other hand, the sealing of the sealing member 66 makes the cabinet 2 in a completely sealed state, isolating oxygen and other combustion-supporting gases from entering the cabinet 2, thereby achieving fire extinguishing inside the cabinet 2.

[0042] Finally, by setting a conductive element at the sealing ends of two adjacent seals 66, when the two seals 66 are in contact with each other during movement, the current passes through the two conductive elements to form a closed loop, thereby causing the alarm component 4 to sound an alarm, and at the same time controlling the cabinet door 22 and the cabinet body 2 to be locked, effectively preventing the electrical cabinet from emitting heat during use. The detection component alone cannot effectively identify the condition inside the cabinet without opening the cabinet, which is not conducive to the normal operation of the explosion-proof electrical cabinet.

[0043] It should be particularly noted that the present invention allows the gas in the cabinet 2 to enter the refrigeration assembly 6 from one side through the arrangement of the thermal bimetal 62 and the ventilation assembly 5. On the one hand, the gas in the cabinet 2 is doubly cooled by the thermal bimetal 62 and the refrigeration sheet. On the other hand, the thermal bimetal 62 is deformed according to the temperature of the gas and the sliding member 65 is pushed to move to expand the heat dissipation area, so that the device can adjust the heat dissipation effect according to the temperature of the gas. At the same time, when a fire or explosion occurs in the cabinet 2, the temperature of the gas in the cabinet 2 rises instantly and expands. According to the characteristics of the thermal bimetallic strip 62, the instantaneously expanded gas pushes the sliding member 65 to move, thereby driving the thermal bimetallic strip 62 as a whole to slide in the opposite direction, and driving the sealing member 66 to move. On the one hand, the expansion gas generated by the explosion or fire is depressurized by the setting of the refrigeration bin 63 to prevent the cabinet door 22 from being broken due to excessive air pressure in the cabinet 2 and causing a secondary fire or explosion. On the other hand, the cabinet 2 is sealed after the pressure relief is completed by the setting of the sealing member 66 to prevent the gas flow in the cabinet 2 from causing the fire to spread to the surroundings, and at the same time, the cabinet 2 is flame-retardant and fire-extinguishing.

[0044] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An explosion-proof electrical control cabinet, comprising a base, a cabinet body is arranged above the base, and an alarm component is arranged on the top of the cabinet body, characterized in that: A plurality of ventilation holes are provided at the bottom of the cabinet inner cavity, and a ventilation component is provided in the inner cavity of the base; A refrigeration assembly is provided below the ventilation assembly, and the inner cavity of the cabinet is connected with the refrigeration assembly through ventilation holes and the ventilation assembly. The refrigeration assembly includes two connectors, and a plurality of thermal bimetallic sheets are provided in a linear array at the bottom of each connector.

2. The explosion-proof electrical control cabinet according to claim 1, characterized in that: The refrigeration component also includes a refrigeration bin, which is fixedly installed inside the base. Two baffles are fixedly connected to the two ends of the refrigeration bin near the ventilation component, and the sliding member is slidably connected to the two baffles.

3. The explosion-proof electrical control cabinet according to claim 2, characterized in that: A pushing member is fixedly connected to the bottom of the side with a low expansion coefficient of each thermal bimetallic strip, a sliding member is provided at the other end of the pushing member, and a refrigeration plate is provided on the sliding member, and sealing members for closing the ventilation assembly are respectively provided at both ends of the two connecting members close to the ventilation assembly, and the sealing members include a sealing end and a connecting end, and the sealing ends of the two sealing members are both in contact with the top of the inner cavity of the refrigeration bin, one side of the connecting end of the two seals is connected to the connecting member, and the other side is connected to the sealing end of the seal, and the connecting ends of two adjacent seals are staggered up and down.

4. The explosion-proof electrical control cabinet according to claim 3, characterized in that: A sliding block is hingedly connected to one end of the pushing member away from the thermal bimetallic strip, and the sliding block is slidably connected to the sliding member.

5. The explosion-proof electrical control cabinet according to claim 4, characterized in that: The ventilation assembly includes two ventilation grooves, which are arranged on the top of the base and penetrate the top of the base and are connected to the ventilation holes. An air collecting bin is fixedly connected below the ventilation groove. An air pump is fixedly installed in one of the air collecting bins. The air in the cabinet is drawn into the refrigeration assembly through the air pump, and the gas is sent into the cabinet through the other air collecting bin.

6. The explosion-proof electrical control cabinet according to claim 3, characterized in that: A connecting pipe is fixedly installed at the bottom of each gas collecting bin, and one end of the connecting pipe away from the gas collecting bin extends into the refrigeration assembly. The radius of the connecting pipe is smaller than the width of the seal. When the two seals are in contact with each other, the connecting pipe will be blocked.

7. The explosion-proof electrical control cabinet according to claim 1, characterized in that: Two legs are fixedly connected to both sides of the bottom of the base, a mounting frame is fixedly connected to the inside of the cabinet, a plurality of electrical components are arranged on the mounting frame, a cabinet door is movably connected to one side of the cabinet, a plurality of electrical switches are arranged in an array on the cabinet door, and the plurality of electrical switches are electrically connected to the electrical components.

8. The explosion-proof electrical control cabinet according to claim 7, characterized in that: A sealing strip is fixedly installed around one side of the cabinet door close to the inner cavity of the cabinet. When the cabinet door is rotated to fit together with the cabinet, the sealing strip is used to fill and seal the gap between the cabinet and the cabinet door. A plurality of electromagnetic plugs are fixedly connected around one end of the cabinet door close to the cabinet, and a plurality of sockets compatible with the electromagnetic plugs are provided in the cabinet.

9. The explosion-proof electrical control cabinet according to claim 1, characterized in that: The alarm component comprises a detection platform, a warning light is fixedly connected to the top of the detection platform, and a suction pipe is fixedly connected to one side of the detection platform.

10. The explosion-proof electrical control cabinet according to claim 9, characterized in that: The side of the air extraction pipe away from the detection platform penetrates the cabinet and extends into the inner cavity of the cabinet. A temperature sensor and an air extraction device are arranged in the detection platform.

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