Explosion-proof electrical control cabinet

Abstract

The present invention discloses an explosion-proof electrical control cabinet, which relates to the technical field of electrical cabinets. The control cabinet includes a base, a cabinet body is provided above the base, an alarm assembly is provided on the top of the cabinet body, a plurality of ventilation holes are provided at the bottom of the cabinet inner cavity, and a ventilation assembly 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 to the refrigeration assembly through the ventilation holes and the ventilation assembly. The refrigeration assembly includes two connecting parts, and a plurality of thermal bimetallic strips are provided at the bottom of each connecting part in a linear array. The present invention allows the gas in the cabinet to enter the refrigeration assembly from one side through the arrangement of the thermal bimetallic strips and the ventilation assembly. On the one hand, the gas in the cabinet is doubly cooled by the thermal bimetallic strips and the cooling strips. On the other hand, the thermal bimetallic strips are deformed according to the temperature of the gas and push 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.

Description

Technical Field

[0001] The present 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. Explosion-proof electrical control boxes utilize specialized materials and designs to effectively isolate and protect electrical components in hazardous environments, significantly reducing the probability of explosion accidents.

[0003] The Chinese patent application number 202011114892X discloses an outdoor explosion-proof vertical electrical control cabinet with a built-in heat dissipation protection structure, including an outer 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 outer shell through a hinge, and a cold row is installed on the top of the outer shell, and a wire management box is installed on the lower inner side of the outer shell. Heat dissipation holes are opened on the back of the outer shell, and a back plate is installed at the rear of the outer 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. Mounting hole grooves are opened on the mounting plate, and the conduit is connected to the liquid inlet and 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, when the motor is turned on, 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 slot through the docking port of the air pipe, and can also achieve the effect of heat dissipation, and at the same time, some flocs in the placement slot 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 set on the electrical cabinet to dissipate heat from the electrical cabinet. However, since the explosion-proof electrical cabinet must be isolated from the external gas when in use, the setting of the ventilation device will allow some external gas to enter the interior of the electrical cabinet, causing the explosion-proof electrical cabinet to lose its explosion-proof capability. At the same time, when the explosion-proof electrical cabinet is dissipating 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 are 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 situation 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 object 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 objectives, the present invention provides the following technical solutions: an explosion-proof electrical control cabinet, comprising a base, a cabinet body is provided above the base, an alarm assembly is provided on the top of the cabinet body, a plurality of ventilation holes are provided at the bottom of the inner cavity of the cabinet, and a ventilation assembly 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 to the refrigeration assembly through the ventilation holes and the ventilation assembly, and the refrigeration assembly comprises two connecting parts, and the bottom of each connecting part is provided with a plurality of thermal bimetallic strips in a linear array, and a pushing part is fixedly connected to the bottom of the side with a low expansion coefficient of each thermal bimetallic strip, and a sliding part is provided at the other end of the pushing part, and a refrigeration plate is provided on the sliding part, and the two connecting parts are respectively provided with sealing parts for closing the ventilation assembly at both ends close to the ventilation assembly.

[0010] Preferably, the refrigeration component further includes a refrigeration bin, which is fixedly mounted inside the base. Two baffles are fixedly connected to both ends of the refrigeration bin near 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 member, 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 tube is fixedly installed at the bottom of each gas collecting bin, and one end of the connecting tube away from the gas collecting bin extends into the refrigeration assembly, and the radius of the connecting tube is smaller than the width of the seal. When the two seals are in contact with each other, the connecting tube will be blocked.

[0015] Preferably, two legs are fixedly connected to both sides of the bottom of the base, a mounting bracket is fixedly connected to the inside of the cabinet, a plurality of electrical components are provided on the mounting bracket, a cabinet door is movably connected to one side of the cabinet, a plurality of electrical switches are arrayed 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 body, the sealing strip fills and seals the gap between the cabinet body and the cabinet door. A plurality of electromagnetic latches are fixedly connected around one end of the cabinet door close to the cabinet body, and a plurality of sockets compatible with the electromagnetic latches are provided in the cabinet body.

[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.

[0018] 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.

[0019] Technical effects and advantages of the present invention:

[0020] 1. The present invention uses a thermal bimetallic strip and a ventilation assembly to allow the gas in the cabinet to enter the refrigeration assembly from one side. On the one hand, the thermal bimetallic strip and the refrigeration plate provide dual heat dissipation for the gas in the cabinet. 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. As a result, the device can adaptively adjust the heat dissipation effect according to the temperature of the gas.

[0021] 2. The present invention is provided with devices such as thermal bimetallic 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 bimetallic strip, the instantaneously expanded gas pushes the sliding part to move, thereby driving the thermal bimetallic 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 the refrigeration bin to avoid excessive air pressure in the cabinet to break through the cabinet door and cause 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 avoid the flow of gas in the cabinet to cause the fire to spread to the surroundings, and at the same time, the cabinet is flame-retarded and fire-extinguished. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic structural diagram of another state of the overall structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the half-section structure of the interior of the cabinet of the present invention;

[0025] Figure 4 This is a schematic diagram of a half-section structure of the ventilation assembly of the present invention;

[0026] Figure 5 It is a schematic diagram of the exploded structure of the refrigeration component of the present invention;

[0027] Figure 6 Schematic diagram of the explosion structure of the connecting piece and the thermal bimetallic plate of the present invention;

[0028] Figure 7 This is a schematic diagram of the connection structure between the pusher and the sliding member of the present invention;

[0029] Figure 8 It is a schematic diagram of the connection between the pushing member and the sliding block of the present invention.

[0030] 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 assembly; 41. Inspection table; 42. Alarm light; 43. Exhaust pipe; 5. Ventilation assembly; 51. Ventilation trough; 52. Gas collecting chamber; 53. Connecting pipe; 6. Refrigeration assembly; 61. Connecting piece; 62. Thermal bimetallic strip; 63. Refrigeration chamber; 64. Pushing piece; 65. Sliding piece; 66. Sealing piece; 67. Baffle; 68. Sliding block. DETAILED DESCRIPTION

[0031] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] 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 provided above the base 1, and an alarm component 4 is provided 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 issued through the alarm component 4 to prompt the construction personnel.

[0033] 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 passes through the cabinet 2 on the side away from the detection platform 41 and extends into the inner cavity of the cabinet 2. 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.

[0034] 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 the 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.

[0035] 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, and a mounting frame 21 is fixedly connected to the inside of the cabinet body 2, and a plurality of electrical components are provided on the mounting frame 21. A cabinet door 22 is movably connected to one side of the cabinet body 2, and a plurality of electrical switches 23 are arranged in an array on the cabinet door 22. The plurality of electrical switches 23 are electrically connected to the electrical components. By fixing the two legs 3 at the bottom of the base 1, the base 1 and the cabinet body 2 are separated from the ground, effectively avoiding the problem of ground moisture infiltrating into the cabinet body 2 after the device is placed for a long time. At the same time, the legs 3 can be set to a telescopic structure to adjust the length of the legs 3 according to usage requirements.

[0036] 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 2 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 latches are fixedly connected around one end of the cabinet door 2 close to the cabinet body 2. A plurality of sockets compatible with the electromagnetic latches are provided in the cabinet body 2. By fixing the sealing strip 25 on the cabinet door 22 and arranging a plurality of electromagnetic latches on the cabinet door 22, when the cabinet door 22 and the cabinet body 2 are fitted together, the cabinet door 22 and the cabinet body 2 are first locked by the electromagnetic latch, and then a sealed area is formed in the inner cavity of the cabinet body 2 through the mutual cooperation of the arranged sealing strip 25 and the cabinet door 22, thereby preventing flammable and explosive gases, dust or liquids from the outside from entering the cabinet body 2 and causing fire or explosion.

[0037] 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 be used to control the electrical components in the cabinet body 2 without opening.

[0038] 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 provided 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 by the refrigeration component 6, so that the internal temperature of the cabinet 2 is always within the preset range, avoiding the problem of multiple electrical components in the cabinet 2 not being able to work normally due to excessively high or low temperatures.

[0039] like Figure 3As shown, in this embodiment, the ventilation component 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 groove 51. 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 component 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 component 5 starts working, the cabinet is turned on by controlling the air pump in the left air collecting bin 52 to work. The gas in 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. The vacuum pump in the left gas collecting bin 52 continues to operate, so that the gas in the cabinet 2 is circulated in one direction through the refrigeration assembly 6, thereby regulating the temperature in the cabinet 2.

[0040] 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 provided at the bottom of each connecting member 61 in a linear array. A pusher 64 is fixedly connected to the bottom of the side with a low expansion coefficient of each thermal bimetallic sheet 62, and a sliding member 65 is provided at the other end of the pushing member 64, and a refrigeration sheet is provided 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 pusher 64. When the temperature in the refrigeration component 6 gradually rises, 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 pusher 64 set here to push the sliding member 65 to move away from the thermal bimetallic strip 62, thereby expanding the cooling area of ​​the refrigeration plate and effectively cooling the high-temperature gas.

[0041] 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.

[0042] 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 connector 61, and the other side is connected to the sealing end of the seal 66. The connecting ends of the two adjacent seals 66 are staggered up and down. By setting 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.

[0043] 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 chamber 63, and the sealing end of the seal 66 is arranged in a side area away from the length direction of the refrigeration chamber 63.

[0044] In this embodiment, the end of the pushing member 64 away from the thermal bimetallic strip 62 is hinged with a sliding block 68, 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. The setting of the sliding block 68 effectively avoids the problem that the sliding member 65 and the pushing member 64 are limited and stuck to each other, resulting in the inability of the sliding member 65 to slide.

[0045] like Figure 5-8 As shown, in this embodiment, a connecting pipe 53 is fixedly installed at the bottom of each gas collecting bin 52, and the 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 seal 66. When the two seals 66 fit together, the connecting pipe 53 will be blocked. By staggering the two seals 66 and connecting them with two connectors 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 connectors 61 away from each other. At this time, the two connectors 61 will drive the two seals 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 seal 66, effectively preventing air from entering the cabinet 2, thereby achieving fire extinguishing inside the cabinet 2.

[0046] 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 push 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 the preset range.

[0047] During use, first, the air is extracted by the air pump arranged in the air collecting bin 52 on one side of the bottom of the cabinet 2, and the gas in the cabinet 2 is sucked into the ventilation area in the refrigeration bin 63 through the air collecting bin 52 and the connecting pipe 53. The continuous operation of the air 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 cools the gas through the refrigeration plate arranged on the sliding part 65. Then, the gas is transmitted to the cabinet 2 through another air collecting bin 52 and the connecting pipe 53, thereby realizing the regulation of the temperature in the cabinet 2 in a closed environment, effectively solving the problem of external heat dissipation in the prior art causing external gas to enter the cabinet 2, making the device explosion-proof.

[0048] Secondly, when the gas in the cabinet 2 enters the refrigeration bin 63 for heat exchange through the gas collecting bin 52 and the connecting pipe 53, the gas comes into contact with 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 setting of the thermal bimetallic strips 62, which prolongs the time for the gas to pass through the refrigeration area, 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 performing a second-order heat dissipation on the gas in this area through the refrigeration sheet arranged on the sliding member 65.

[0049] It should be noted that since the degree of deformation of the thermal bimetallic strip 62 is proportional to the gas temperature, that is, the higher the gas temperature, the greater the degree of deformation 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 cooling 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 causes the temperature inside the distribution cabinet to increase.

[0050] 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, and the problem of the fire source contacting the external gas when the air pressure inside the cabinet 2 breaks through the cabinet door 22, causing a secondary fire or explosion, is avoided. 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 at the same time through the two air collecting bins 52 under the action of air pressure, and the hot bimetallic strip 62 arranged in the refrigeration bin 63 absorbs 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 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 completely sealed, isolating oxygen and other combustion-supporting gases from entering the cabinet 2, thereby achieving fire extinguishing inside the cabinet 2.

[0051] Finally, by setting a conductive element at the sealing end of two adjacent seals 66, when the two seals 66 fit together 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 avoiding the heat dissipation of the electrical cabinet during use. The condition inside the cabinet cannot be effectively identified by the detection component alone without opening the cabinet, which is not conducive to the normal operation of the explosion-proof electrical cabinet.

[0052] It should be 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 bimetallic strip 62 and the ventilation assembly 5. On the one hand, the gas in the cabinet 2 is doubly cooled by the thermal bimetallic strip 62 and the refrigeration sheet. On the other hand, the thermal bimetallic strip 62 is deformed according to the temperature of the gas and pushes the sliding member 65 to move, thereby expanding the heat dissipation area. As a result, the device can adaptively 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 instantaneously and expands. According to the characteristics of the thermal bimetallic strip 62, the instantaneous expansion of the gas pushes the sliding member 65 to move, thereby driving the thermal bimetallic strip 62 as a whole to slide in the reverse 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 chamber 63 to prevent the cabinet door 22 from breaking through the cabinet body 2 due to excessive air pressure in the cabinet body 2, causing a secondary fire or explosion. On the other hand, the cabinet body 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 body 2 from causing the fire to spread to the surroundings, and at the same time, the cabinet body 2 is flame-retarded and fire-extinguished.

[0053] 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, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An explosion-proof electrical control cabinet, comprising a base, a cabinet body disposed above the base, and an alarm assembly disposed 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 assembly is provided in the inner cavity of the base; a refrigeration assembly is provided below the ventilation assembly, and the cabinet inner cavity is connected to the refrigeration assembly through the ventilation holes and the ventilation assembly, and the refrigeration assembly includes two connecting parts, and a plurality of thermal bimetallic strips are provided in a linear array at the bottom of each connecting part; The refrigeration assembly further includes a refrigeration bin, which is fixedly mounted inside the base. Two baffles are fixedly connected to both ends of the refrigeration bin near the ventilation assembly. A pusher is fixedly connected to the bottom of the side with a low expansion coefficient of each thermal bimetallic strip, and a sliding member is provided at the other end of the pushing member. The sliding member is slidably connected to the two baffles, and a refrigeration fin is provided on the sliding member. The two ends of the two connecting members close to the ventilation component are respectively provided with sealing members for closing the ventilation component. The sealing members include a sealing end and a connecting end. 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; 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. 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.

2. The explosion-proof electrical control cabinet according to claim 1, characterized in that: 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.

3. The explosion-proof electrical control cabinet according to claim 1, 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, 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.

4. 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 provided on the mounting frame, a cabinet door is movably connected to one side of the cabinet, a plurality of electrical switches are arrayed on the cabinet door, and the plurality of electrical switches are electrically connected to the electrical components.

5. The explosion-proof electrical control cabinet according to claim 4, characterized in that: A sealing strip is fixedly installed around one side of the cabinet door close to the cabinet inner cavity. When the cabinet door is rotated to fit together with the cabinet body, the sealing strip fills and seals the gap between the cabinet body and the cabinet door. A plurality of electromagnetic latches are fixedly connected around one end of the cabinet door close to the cabinet body, and a plurality of sockets compatible with the electromagnetic latches are provided in the cabinet body.

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

7. The explosion-proof electrical control cabinet according to claim 6, characterized in that: The side of the exhaust pipe away from the detection platform passes through the cabinet and extends into the inner cavity of the cabinet. A temperature sensor and an exhaust device are provided in the detection platform.

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