A distribution cabinet with emergency dehumidification function

Abstract

The present invention relates to the technical field of power distribution stations, and specifically to a power distribution cabinet with an emergency dehumidification function, wherein the power distribution cabinet comprises a cabinet body, a cabinet door, a lead mechanism, an air inlet box and a dehumidification seat, wherein the cabinet door is arranged at a side end of the cabinet body, and the lead mechanism is arranged at an end of the bottom of the cabinet body away from the cabinet door. Compared with the current power distribution cabinet, the present invention is provided with a dehumidification mechanism, and the dehumidification mechanism can timely adjust the ventilation effect of the dehumidification mechanism according to the gas humidity in the working chamber, thereby ensuring that the gas in the working chamber is dry and low in temperature, and avoiding poor gas flow in the working chamber. The present invention is also provided with a lead mechanism, through which gaps between cables and the cabinet body or between cables can be avoided. If at a certain moment, the staff needs to drag the cable, the lead mechanism will detect the posture of the cable, and then change the clamping force, so as to facilitate the staff to drag the cable.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution stations, in particular to a power distribution cabinet with an emergency dehumidification function. Background Art

[0002] A power distribution cabinet is a device used to centrally manage power distribution. It is usually installed in industrial facilities, commercial buildings or large residential areas. Its main functions include power distribution, power monitoring and protection to ensure the safe and efficient operation of the power system. Depending on the place of use and needs, the power distribution cabinet can also be freely customized as needed to meet specific power distribution and management needs.

[0003] Current power distribution cabinets are usually equipped with heat dissipation and dehumidification functions, such as the patents "Distribution cabinet dehumidification device and distribution cabinet with publication number CN115364633A" and "A self-pressurized dehumidification distribution cabinet with publication number CN114243476B". However, while ensuring the dehumidification effect, the existing technical solutions often sacrifice the smooth flow of gas, and cannot timely adjust the dehumidification effect and ventilation effect of the dehumidification mechanism according to the gas humidity in the cabinet. In addition, in order to ensure the sealing of the cabinet, the current distribution cabinet usually uses insulating putty or a special sealing structure to block the inlet and outlet of the distribution cabinet, such as the patent "CN117996 572A A sealing structure for incoming and outgoing cables for a power distribution cabinet", but in actual work, workers sometimes drag the cables, causing the cables in the power distribution cabinet to move. However, in order to ensure the sealing effect, the existing sealing mechanism usually exerts a large force on the surface of the cable, so that every time the worker moves the cable, the sealing mechanism needs to be manually adjusted, otherwise the cable is difficult to move, and even when the cable is moved by brute force, the cable or the sealing mechanism will be damaged; finally, the current power distribution cabinet usually has no redundant design in terms of fire extinguishing, so that sometimes the fire extinguishing system cannot work normally due to various accidents. Summary of the invention

[0004] The purpose of the present invention is to provide a distribution cabinet with emergency dehumidification function to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a power distribution cabinet with emergency dehumidification function, the power distribution cabinet comprising a cabinet body, a cabinet door, a lead mechanism, an air inlet box and a dehumidification seat, the cabinet door is arranged at the side end of the cabinet body, the lead mechanism is arranged at an end of the bottom of the cabinet body away from the cabinet door, and the lead mechanism is used to ensure that the cables can move freely, so as to avoid gaps between the cables and the cabinet body or between the cables. When the present invention is in use, the cabinet body can be separated from the external environment by the cabinet door and the lead mechanism, the dehumidification seat is arranged on a side of the cabinet body away from the cabinet door, the dehumidification mechanism is arranged in the dehumidification seat, two groups of the air inlet boxes are arranged, and the two groups of the air inlet boxes are relatively arranged on the left and right sides of the cabinet body, a working chamber is arranged inside the cabinet body, a filter chamber is arranged above the working chamber, the working chamber and the filter chamber are connected through an air outlet, and the inner walls on both sides of the working chamber are provided with A plurality of groups of air inlet holes are provided, wherein the plurality of groups of the air inlet holes are connected with two groups of air inlet boxes, a filter is arranged inside the filter cavity, the filter is connected with the air inlet end of the dehumidification mechanism through an air inlet pipe, and the two groups of the air inlet boxes are connected with the air outlet end of the dehumidification mechanism through two groups of air outlet pipes. During the use of the present invention, the dehumidification mechanism will continuously control the gas in the working cavity to flow along the air outlet hole-filter-air inlet pipe-dehumidification mechanism-air outlet pipe-air inlet box-air inlet hole. During the flow of the gas, the gas in the working cavity is purified by the filter to prevent dust and other impurities from remaining in the working cavity every time the staff opens and closes the cabinet door. The gas in the working cavity is dehumidified and cooled by the dehumidification mechanism. On the one hand, the gas temperature in the working cavity is prevented from being too high to cause thermal damage and aging of the components. On the other hand, the insulation performance of the electrical components in the working cavity is prevented from being reduced, thereby ensuring the stability and reliability of the electrical system.

[0006] Furthermore, a temperature detector is provided inside the working chamber, and the temperature change of the working chamber is detected by the temperature detector. A protective chamber and a sealed chamber are provided below the working chamber, and the sealed chamber is connected with the air inlet box through a protective pipe. The protective chamber is a heat-insulating environment and is filled with a fire-extinguishing medium. A sealing mechanism is provided in the sealed chamber, and the sealing mechanism is electrically connected to the temperature detector. The fire-extinguishing medium used in the present invention is carbon dioxide. When the present invention is used normally, the protective chamber and the sealed chamber are isolated by the sealing mechanism. When a fire occurs in an electrical component in the working chamber, the temperature detector controls the sealing mechanism to open. At this time, the protective chamber is connected with the sealed chamber, and the fire-extinguishing medium in the protective chamber will enter the working chamber along the protective pipe and the air inlet box, so as to achieve the purpose of extinguishing the fire.

[0007] Furthermore, the dehumidification mechanism includes a first dehumidification tank, a fan, a second dehumidification tank and an annular groove, a condenser is arranged in the first dehumidification tank, a drying plate is arranged in the second dehumidification tank, a desiccant is arranged in the drying plate, one end of the first dehumidification tank is connected to an air inlet duct, the other end of the first dehumidification tank is connected to an air suction end of the fan through an air inlet channel, one end of the second dehumidification tank is connected to an air exhaust end of the fan, the other end of the second dehumidification tank is connected to the annular groove, two groups of exhaust holes are arranged on the outer side of the annular groove, and each group of the exhaust holes is connected to a group of air outlet ducts. When the present invention is in use, the fan controls the gas in the working chamber to flow in the dehumidification mechanism along: first dehumidification tank-air inlet channel-second dehumidification tank-annular groove, the gas in the working chamber is cooled and preliminarily dehumidified by the condenser in the first dehumidification tank, and the gas in the working chamber is secondarily dehumidified by the drying plate in the second dehumidification tank. Through the above technical scheme, it is ensured that the gas in the working chamber is always in a dry and low-temperature state.

[0008] Furthermore, a hygrometer is provided in the air inlet channel, and the humidity of the gas in the working chamber after coming out of the first dehumidification tank is detected by the hygrometer. A liquid pump and a liquid storage tank are provided in the dehumidification seat. Several groups of drying plates are provided, and a group of telescopic grooves are provided under each group of drying plates. Each group of telescopic grooves is connected to the liquid pump through a group of guide pipes, and a group of valves is provided on each group of guide pipes. The liquid pump is connected to the liquid storage tank, and the liquid pump has a two-way liquid discharge function. The liquid storage tank and the telescopic groove are filled with transmission fluid. Through the valves provided on the liquid pump and the guide pipe, the staff can control the position of each group of drying plates (the specific working principle is as follows: when the working When the staff needs to control a group of drying plates to descend, they only need to open the corresponding valve, and then use the liquid pump to pump the transmission fluid under the group of drying plates into the liquid storage tank. At this time, the group of drying plates will automatically fall into the liquid storage tank under the action of gravity; similarly, when the staff needs to control a group of drying plates to rise, they only need to open the corresponding valve, and then use the liquid pump to transport the transmission fluid in the liquid storage tank to the bottom of the group of drying plates. At this time, the group of drying plates will automatically rise under the action of hydraulic pressure). Compared with the current dehumidification mechanism, the present invention is provided with a hygrometer and several groups of movable drying plates, so that the staff can adjust the ventilation effect of the second dehumidification tank in time according to the gas humidity in the working chamber.

[0009] Furthermore, an alarm groove is also provided in the dehumidifier seat, one end of the alarm groove is connected to the air duct through a pressure relief valve, and the other end of the alarm groove is connected to the external environment. The alarm groove is a whistle-shaped structure, and a ball is provided in the alarm groove. During use of the present invention, if a fire occurs in the electrical components in the working chamber, the fire extinguishing medium in the protective chamber will enter the working chamber along the protective pipe and the air inlet box. Since the working chamber is connected to the dehumidification mechanism, the fire extinguishing medium in the protective chamber will eventually fill the first dehumidification groove and the air duct. Under the action of air pressure, the pressure relief valve opens, and part of the fire extinguishing medium will be discharged from the alarm groove to the outside. During the movement of this part of the fire extinguishing medium, a loud alarm sound will be generated to remind the staff that there is a problem with the present invention. Compared with the current direct alarm through electrical equipment, the present invention has a higher fault tolerance rate, which avoids the wires of the electrical alarm equipment from being burned out when the fire just occurs, so that the staff cannot discover the fire in time.

[0010] Furthermore, the lead-in mechanism includes a fixing frame, which is fixedly mounted on the cabinet, and a plurality of groups of lead-in holes are provided at one end of the fixing frame close to the working chamber, and a group of air bags are provided inside each group of the lead-in holes, and an air storage tank and an air cylinder are provided below the lead-in holes, and the air storage tank is connected with the plurality of groups of air bags through a diversion channel, and compressed gas and a piston are provided in the air storage tank, and the piston is connected with the cylinder, and a first piezoelectric sheet is provided at one end of the piston away from the cylinder. When the present invention is in use, the staff can insert the cable into the cabinet through the lead-in hole, and when the cable is connected to the electrical component in the cabinet, the staff can squeeze the compressed gas in the air storage tank into the air bag by opening the cylinder, and the air bag will expand and wrap the cable. Through the above technical scheme, it is avoided that there is a gap between the cable and the cabinet or between the cables during the use of the present invention, so as to prevent the gas in the external environment from entering the cabinet.

[0011] Furthermore, a plurality of groups of second sensing slots are provided at one end of the fixing frame away from the working chamber, each group of the lead holes is aligned with a group of second sensing slots, a group of support plates are provided inside each group of the second sensing slots, a group of first sensing slots are provided below each group of the second sensing slots, each group of the support plates is connected to a group of first sensing slots through a sensing spring, a second piezoelectric sheet is provided at one end of the support plate close to the sensing spring, and the second piezoelectric sheet is connected to the cylinder. When the cable is passed through the lead hole of the present invention, the cable will first pass through the second sensing slot. At this time, the staff needs to ensure that the cable is located above the support plate. When the cable is aligned with the cabinet After the electrical components in the body are connected, the cable located in the second sensing slot will be in a relaxed and drooping posture. At this time, the cable will exert a set of downward forces on the support plate, and the second piezoelectric sheet will generate a set of electrical signals. During normal use of the present invention, if the staff needs to drag the cable, the cable will change from a relaxed and drooping posture to a tensioned posture. At this time, the downward force exerted by the cable on the support plate will be reduced or even disappear. Finally, the electrical signal generated by the second piezoelectric sheet will change, and the cylinder will extract a part of the compressed gas in several groups of airbags to reduce the degree of clamping of the airbags on the cables, thereby facilitating the staff to drag the cables.

[0012] Furthermore, the protective cavity and the sealing cavity are connected through a through hole, and the sealing mechanism includes a sealing plate and an electromagnet, the sealing plate is arranged at one end of the sealing cavity close to the through hole through a sealing spring rod, and the electromagnet is arranged at one end of the sealing cavity close to the protective pipe, a heat conducting plate is arranged at the bottom of the working cavity, an emergency frame is arranged inside the protective cavity, an emergency groove is arranged inside the emergency frame, a heat conducting rod, emergency gas and a push rod are arranged in the emergency groove, the heat conducting rod is connected to the heat conducting plate, the push rod is connected to the sealing plate, and the emergency gas can be selected according to the needs of the staff to ensure the temperature in the working cavity When a certain critical value is reached, the pressure generated by the expansion of the emergency gas can push the sealing plate away from the through hole. The specific working principle is as follows: When the present invention encounters a fire, if the temperature detector fails, or the wire that outputs the signal to the outside of the temperature detector is burned out when the fire just occurs, then as the temperature in the working chamber rises, the emergency gas will expand and exert a set of forces on the top rod. Finally, when the temperature in the working chamber reaches a certain critical value, the sealing plate is pushed away from the through hole, and the fire extinguishing medium in the emergency groove is released into the working chamber. Compared with the emergency fire extinguishing measures currently adopted by the distribution cabinet, the present invention has higher safety and higher fault tolerance.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: compared with the current power distribution cabinet, the present invention is provided with a dehumidification mechanism, and the gas in the working chamber is dehumidified and cooled by the dehumidification mechanism, which, on the one hand, avoids the gas temperature in the working chamber from being too high and causing thermal damage and aging of components, and on the other hand, prevents the insulation performance of electrical components in the working chamber from being reduced, thereby ensuring the stability and reliability of the electrical system. Compared with the current dehumidification mechanism, the dehumidification mechanism provided in the present invention can timely adjust the ventilation effect of the dehumidification mechanism according to the gas humidity in the working chamber, thereby avoiding poor gas flow in the working chamber on the basis of ensuring the dryness and low temperature of the gas in the working chamber. The present invention is also provided with a lead-in mechanism, and when the cable passes through the lead-in mechanism, the lead-in mechanism can avoid gaps between the cable and the cabinet or between the cables, thereby preventing the gas in the external environment from entering the cabinet. If at a certain moment, the staff needs to drag the cable, the lead-in mechanism The posture of the cable will be detected, and the clamping force will be changed to facilitate the staff to drag the cable. Finally, the present invention is provided with a protective cavity and a sealing cavity. The connection state between the protective cavity and the sealing cavity is controlled by a sealing mechanism. When a fire occurs in the electrical components in the working cavity, the temperature detector controls the sealing mechanism to open. At this time, the protective cavity is connected to the sealing cavity, and the fire extinguishing medium in the protective cavity will enter the working cavity along the protective pipe and the air inlet box, so as to achieve the purpose of fire extinguishing. If the temperature detector fails, or the wire that outputs the signal to the outside of the temperature detector is burned when the fire just occurs, as the temperature in the working cavity rises, the emergency gas will expand and exert a set of forces on the top rod. When the temperature in the working cavity reaches a certain critical value, the sealing mechanism is opened to release the fire extinguishing medium in the emergency slot into the working cavity. Compared with the emergency fire extinguishing measures currently adopted by the distribution cabinet, the present invention has higher safety and higher fault tolerance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 is a first perspective schematic diagram of the present invention;

[0016] Figure 2 is a second viewing angle schematic diagram of the present invention;

[0017] Figure 3 is a cross-sectional view of the present invention;

[0018] Figure 4 It is a schematic diagram of the internal structure of the dehumidification seat of the present invention;

[0019] Figure 5 The present invention Figure 4 Schematic diagram of the structure of the middle AA part;

[0020] Figure 6 It is a schematic diagram of the lead wire mechanism structure of the present invention;

[0021] Figure 7 It is a schematic diagram of the internal structure of the lead-in mechanism of the present invention;

[0022] Figure 8 The present invention Figure 7 Schematic diagram of the structure of the middle BB part;

[0023] Fig. 9 The present invention Figure 7 Schematic diagram of the CC structure;

[0024] Fig.10 It is a schematic diagram of the internal structure of the protection cavity of the present invention;

[0025] Fig.11 It is a schematic diagram of the internal structure of the emergency rack of the present invention.

[0026] In the figure: 1, cabinet; 11, working chamber; 111, air inlet; 112, air outlet; 113, heat conduction plate; 12, filter chamber; 121, filter; 13, protection chamber; 131, emergency frame; 1311, emergency slot; 1312, top rod; 1313, heat conduction rod; 14, sealing chamber; 141, sealing plate; 142, electromagnet; 2, cabinet door; 3, lead wire mechanism; 31, fixed frame; 32, lead wire hole; 33, gas storage tank; 34, first sense Response slot; 35. Support plate; 36. Air bag; 37. Second sensing slot; 38. Diversion channel; 39. Cylinder; 4. Air intake box; 5. Dehumidification seat; 51. First dehumidification slot; 511. Condenser; 52. Air inlet channel; 521. Humidifier; 53. Fan; 54. Second dehumidification slot; 541. Drying plate; 55. Annular slot; 551. Exhaust hole; 56. Telescopic slot; 561. Guide pipe; 57. Liquid pump; 58. Liquid storage tank; 59. Alarm slot. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] See also Figure 1-Figure 11The present invention provides a technical solution: a power distribution cabinet with emergency dehumidification function, the power distribution cabinet comprising a cabinet body 1, a cabinet door 2, a lead mechanism 3, an air inlet box 4 and a dehumidification seat 5, the cabinet door 2 is arranged at the side end of the cabinet body 1, and the lead mechanism 3 is arranged at an end of the bottom of the cabinet body 1 away from the cabinet door 2. The lead mechanism 3 ensures that the cables can move freely, so as to avoid gaps between the cables and the cabinet body 1 or between the cables. When the present invention is in use, the cabinet body 1 can be separated from the external environment by the cabinet door 2 and the lead mechanism 3, the dehumidification seat 5 is arranged on a side of the cabinet body 1 away from the cabinet door 2, and a dehumidification mechanism is arranged in the dehumidification seat 5. Two groups of air inlet boxes 4 are arranged, and the two groups of air inlet boxes 4 are relatively arranged on the left and right sides of the cabinet body 1. A working chamber 11 is arranged inside the cabinet body 1, and a filter chamber 12 is arranged above the working chamber 11. The working chamber 11 and the filter chamber 12 are connected through an air outlet 112. A plurality of groups of air inlet holes 111 are arranged on the inner walls on both sides of the working chamber 11, and a plurality of groups of air inlet holes 111 are arranged on the inner walls on both sides of the working chamber 11. The air hole 111 is connected with the two groups of air inlet boxes 4, and a filter 121 is arranged inside the filter chamber 12. The filter 121 is connected with the air inlet end of the dehumidification mechanism through an air inlet pipe, and the two groups of air inlet boxes 4 are connected with the air outlet end of the dehumidification mechanism through two groups of air outlet pipes. During the use of the present invention, the dehumidification mechanism will continuously control the gas in the working chamber 11 to flow along the air outlet hole 112-filter 121-air inlet pipe-dehumidification mechanism-air outlet pipe-air inlet box 4-air inlet hole 111. During the flow of gas, the gas in the working chamber 11 is purified by the filter 121 to prevent dust and other impurities from remaining in the working chamber 11 every time the staff opens and closes the cabinet door 2. The gas in the working chamber 11 is dehumidified and cooled by the dehumidification mechanism. On the one hand, it is avoided that the gas temperature in the working chamber 11 is too high to cause thermal damage and aging of the components. On the other hand, it is prevented that the insulation performance of the electrical components in the working chamber 11 is reduced, thereby ensuring the stability and reliability of the electrical system.

[0029] like Figure 3 As shown, a temperature detector is provided inside the working chamber 11, and the temperature change of the working chamber 11 is detected by the temperature detector. A protective chamber 13 and a sealed chamber 14 are provided below the working chamber 11. The sealed chamber 14 is connected with the air inlet box 4 through a protective pipe. The protective chamber 13 is a heat-insulating environment and is filled with a fire-extinguishing medium. A sealing mechanism is provided in the sealed chamber 14, and the sealing mechanism is electrically connected to the temperature detector. The fire-extinguishing medium used in the present invention is carbon dioxide. When the present invention is used normally, the protective chamber 13 is isolated from the sealed chamber 14 by the sealing mechanism. When a fire occurs in the electrical components in the working chamber 11, the temperature detector controls the sealing mechanism to open. At this time, the protective chamber 13 is connected with the sealed chamber 14, and the fire-extinguishing medium in the protective chamber 13 will enter the working chamber 11 along the protective pipe and the air inlet box 4, so as to achieve the purpose of fire extinguishing.

[0030] like Figure 2-Figure 5As shown, the dehumidification mechanism includes a first dehumidification tank 51, a fan 53, a second dehumidification tank 54 and an annular tank 55. A condenser 511 is arranged in the first dehumidification tank 51, a drying plate 541 is arranged in the second dehumidification tank 54, and a desiccant is arranged in the drying plate 541. One end of the first dehumidification tank 51 is connected to the air intake duct, and the other end of the first dehumidification tank 51 is connected to the air intake end of the fan 53 through the air inlet channel 52. One end of the second dehumidification tank 54 is connected to the exhaust end of the fan 53, and the other end of the second dehumidification tank 54 is connected to the annular tank 55. Two sets of exhaust pipes are arranged on the outside of the annular tank 55. Air holes 551, each group of exhaust holes 551 is connected to a group of air outlet pipes. When the present invention is in use, the fan 53 controls the gas in the working chamber 11 to flow in the dehumidification mechanism along: the first dehumidification groove 51-the air inlet channel 52-the second dehumidification groove 54-the annular groove 55. The condenser 511 in the first dehumidification groove 51 cools and preliminarily dehumidifies the gas in the working chamber 11, and the drying plate 541 in the second dehumidification groove 54 dehumidifies the gas in the working chamber 11 for a second time. Through the above technical solution, it is ensured that the gas in the working chamber 11 is always in a dry and low-temperature state.

[0031] like Figure 4-Figure 5 As shown, a hygrometer 521 is provided in the air inlet channel 52, and the humidity of the gas in the working chamber 11 after coming out of the first dehumidification tank 51 is detected by the hygrometer 521. A liquid pump 57 and a liquid storage tank 58 are provided in the dehumidification seat 5. Several groups of drying plates 541 are provided. A group of telescopic grooves 56 are provided below each group of drying plates 541. Each group of telescopic grooves 56 is connected to the liquid pump 57 through a group of guide pipes 561. A group of valves are provided on each group of guide pipes 561. The liquid pump 57 is connected to the liquid storage tank 58. The liquid pump 57 has a two-way drainage function. The liquid storage tank 58 and the telescopic groove 56 are filled with transmission fluid. Through the valves provided on the liquid pump 57 and the guide pipe 561, the staff can control the position of each group of drying plates 541 (the specific working principle is as follows: when the staff needs When controlling a group of drying plates 541 to descend, it is only necessary to open the corresponding valve, and then pump the transmission fluid under the group of drying plates 541 into the liquid storage tank 58 through the liquid pump 57. At this time, the group of drying plates 541 will automatically fall into the liquid storage tank 58 under the action of gravity; similarly, when the staff needs to control a group of drying plates 541 to rise, it is only necessary to open the corresponding valve, and then transport the transmission fluid in the liquid storage tank 58 to the bottom of the group of drying plates 541 through the liquid pump 57. At this time, the group of drying plates 541 will automatically rise under the action of hydraulic pressure). Compared with the current dehumidification mechanism, the present invention is provided with a hygrometer 521 and a plurality of groups of movable drying plates 541, so as to facilitate the staff to timely adjust the ventilation effect of the second dehumidification tank 54 according to the gas humidity in the working chamber 11.

[0032] like Figure 5As shown, an alarm groove 59 is also provided in the dehumidifier seat 5, one end of the alarm groove 59 is connected to the air bleed channel 52 through a pressure relief valve, and the other end of the alarm groove 59 is connected to the external environment. The alarm groove 59 is a whistle-shaped structure, and a ball is provided in the alarm groove 59. During the use of the present invention, if a fire occurs in the electrical components in the working chamber 11, the fire extinguishing medium in the protective chamber 13 will enter the working chamber 11 along the protective pipe and the air inlet box 4. Since the working chamber 11 is connected to the dehumidification mechanism, the fire extinguishing medium in the protective chamber 13 will eventually fill the first dehumidification groove 51 and the air bleed channel 52. Under the action of air pressure, the pressure relief valve opens, and part of the fire extinguishing medium will be discharged from the alarm groove 59 to the outside. During the movement of this part of the fire extinguishing medium, a loud alarm sound will be generated to remind the staff that there is a problem with the present invention. Compared with the current direct alarm through electrical equipment, the present invention has a higher fault tolerance rate, which avoids the wires of the electrical alarm equipment being burned out when the fire just occurs, so that the staff cannot discover the fire in time.

[0033] like Figure 1-Figure 2 , Figure 6-Figure 9 As shown, the lead-in mechanism 3 includes a fixing frame 31, which is fixedly mounted on the cabinet 1. A plurality of groups of lead-in holes 32 are provided at one end of the fixing frame 31 close to the working chamber 11. A group of air bags 36 are provided inside each group of lead-in holes 32. An air storage tank 33 and a cylinder 39 are provided below the lead-in holes 32. The air storage tank 33 is connected to the plurality of groups of air bags 36 through a shunt channel 38. Compressed gas and a piston are provided in the air storage tank 33. The piston is connected to the cylinder 39. A first piezoelectric sheet is provided at one end of the piston away from the cylinder 39. When the present invention is in use, the staff can insert the cable into the cabinet 1 through the lead-in hole 32. When the cable is connected to the electrical components in the cabinet 1, the staff can squeeze the compressed gas in the air storage tank 33 into the air bag 36 by opening the cylinder 39. At this time, the air bag 36 will expand and wrap the cable. Through the above technical solution, it is avoided that during the use of the present invention, there is a gap between the cable and the cabinet 1 or between the cables, so as to prevent the gas in the external environment from entering the cabinet 1.

[0034] like Figure 6-Figure 9As shown, a plurality of groups of second sensing slots 37 are provided at one end of the fixing frame 31 away from the working chamber 11, each group of lead holes 32 is aligned with a group of second sensing slots 37, a group of support plates 35 are provided inside each group of second sensing slots 37, a group of first sensing slots 34 are provided below each group of second sensing slots 37, each group of support plates 35 is connected to a group of first sensing slots 34 through a sensing spring, a second piezoelectric sheet is provided at one end of the support plate 35 close to the sensing spring, and the second piezoelectric sheet is connected to the cylinder 39. When the cable is passed through the lead hole 32 of the present invention, the cable will first pass through the second sensing slot 37. At this time, the staff needs to ensure that the cable is located above the support plate 35. When After the cable is connected to the electrical components in the cabinet 1, the cable in the second sensing slot 37 will be in a relaxed and drooping posture. At this time, the cable will exert a set of downward forces on the support plate 35, and the second piezoelectric film will generate a set of electrical signals. During normal use of the present invention, if the staff needs to drag the cable, the cable will change from a relaxed and drooping posture to a tensioned posture. At this time, the downward force exerted by the cable on the support plate 35 will be reduced or even disappear. Finally, the electrical signal generated by the second piezoelectric film will change, and the cylinder 39 will extract a part of the compressed gas in several groups of air bags 36 to reduce the clamping degree of the air bags 36 on the cables, thereby facilitating the staff to drag the cables.

[0035] like Figure 5 As shown, the protective chamber 13 is connected to the sealing chamber 14 through a through hole, and the sealing mechanism includes a sealing plate 141 and an electromagnet 142. The sealing plate 141 is arranged at one end of the sealing chamber 14 near the through hole through a sealing spring rod, and the electromagnet 142 is arranged at one end of the sealing chamber 14 near the protective pipe. A heat conducting plate 113 is arranged at the bottom of the working chamber 11, and an emergency frame 131 is arranged inside the protective chamber 13. An emergency groove 1311 is arranged inside the emergency frame 131. A heat conducting rod 1313, emergency gas and a push rod 1312 are arranged in the emergency groove 1311. The heat conducting rod 1313 is connected to the heat conducting plate 113, and the push rod 1312 is connected to the sealing plate 141. The emergency gas can be adjusted according to the needs of the staff. Selection to ensure that when the temperature in the working chamber 11 reaches a certain critical value, the pressure generated by the expansion of the emergency gas can push the sealing plate 141 away from the through hole. The specific working principle is as follows: When the present invention encounters a fire, if the temperature detector fails, or the wire that outputs the signal to the outside of the temperature detector is burned out when the fire just occurs, then as the temperature in the working chamber 11 rises, the emergency gas will expand and apply a set of forces to the top rod 1312. Finally, when the temperature in the working chamber 11 reaches a certain critical value, the sealing plate 141 is pushed away from the through hole, and the fire extinguishing medium in the emergency groove 1311 is released into the working chamber 11. Compared with the emergency fire extinguishing measures currently adopted by the distribution cabinet, the present invention has higher safety and higher fault tolerance.

[0036] Working principle of the present invention: when the staff passes the cable from outside the cabinet 1 to inside the cabinet 1, the cable will first pass through the second sensing slot 37 and then through the lead hole 32. When the cable is connected to the electrical components in the cabinet 1, the staff can squeeze the compressed gas in the gas storage tank 33 into the air bag 36 by opening the cylinder 39. At this time, the air bag 36 will expand and wrap the cable, and the cable in the second sensing slot 37 will show a relaxed and drooping posture. At the same time, the second piezoelectric plate will generate a group of electrical signals. During normal use of the present invention, the dehumidification mechanism will continuously control the gas in the working chamber 11 to flow along the air outlet 112-filter 121-air inlet pipe-dehumidification mechanism-air outlet pipe-air inlet box 4-air inlet hole 111. During the flow of gas, the gas in the working chamber 11 is filtered by the filter 121. Purification is carried out to prevent dust and other impurities from remaining in the working chamber 11 every time the staff opens and closes the cabinet door 2. The gas in the working chamber 11 is dehumidified and cooled by the dehumidification mechanism. If at a certain moment, the staff needs to drag the cable, the cable will change from a loose and drooping posture to a tensioned posture. At this time, the electrical signal generated by the second piezoelectric sheet will change, and the cylinder 39 will extract a part of the compressed gas in several groups of air bags 36 to reduce the clamping degree of the air bags 36 on the cables, thereby facilitating the staff to drag the cables. Finally, when a fire occurs in the electrical components in the working chamber 11, the temperature detector controls the sealing mechanism to open. At this time, the protective chamber 13 is connected to the sealing chamber 14, and the fire extinguishing medium in the protective chamber 13 will enter the working chamber 11 along the protective pipe and the air inlet box 4, so as to achieve the purpose of fire extinguishing.

[0037] Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, substitute and vary the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A power distribution cabinet with emergency dehumidification function, characterized in that: The power distribution cabinet comprises a cabinet body (1), a cabinet door (2), a lead mechanism (3), an air inlet box (4) and a dehumidification seat (5), wherein the cabinet door (2) is arranged at a side end of the cabinet body (1), the lead mechanism (3) is arranged at an end of the bottom of the cabinet body (1) away from the cabinet door (2), the dehumidification seat (5) is arranged at a side of the cabinet body (1) away from the cabinet door (2), a dehumidification mechanism is arranged inside the dehumidification seat (5), two groups of the air inlet boxes (4) are arranged, and the two groups of the air inlet boxes (4) are arranged on the left and right sides of the cabinet body (1) relative to each other, and a working chamber (11) is arranged inside the cabinet body (1). A filter chamber (12) is arranged above the working chamber (11); the working chamber (11) and the filter chamber (12) are connected via an air outlet hole (112); a plurality of groups of air inlet holes (111) are arranged on inner walls on both sides of the working chamber (11); the plurality of groups of air inlet holes (111) are connected to two groups of air inlet boxes (4); a filter (121) is arranged inside the filter chamber (12); the filter (121) is connected to an air inlet end of a dehumidifying mechanism via an air inlet pipe; the two groups of air inlet boxes (4) are connected to an air outlet end of the dehumidifying mechanism via two groups of air outlet pipes; The dehumidification mechanism comprises a first dehumidification groove (51), a fan (53), a second dehumidification groove (54) and an annular groove (55); a condenser (511) is arranged in the first dehumidification groove (51); a drying plate (541) is arranged in the second dehumidification groove (54); one end of the first dehumidification groove (51) is connected to an air inlet duct; the other end of the first dehumidification groove (51) is connected to an air suction end of the fan (53) via an air inlet passage (52); one end of the second dehumidification groove (54) is connected to an air discharge end of the fan (53); the other end of the second dehumidification groove (54) is connected to the annular groove (55); two groups of exhaust holes (551) are arranged on the outer side of the annular groove (55); each group of exhaust holes (551) is connected to a group of air outlet ducts; A humidity meter (521) is provided in the air inlet passage (52), a liquid pump (57) and a liquid storage tank (58) are further provided in the dehumidification seat (5), a plurality of groups of drying plates (541) are provided, a group of telescopic grooves (56) is provided below each group of drying plates (541), each group of telescopic grooves (56) is connected to the liquid pump (57) via a group of flow guide tubes (561), each group of flow guide tubes (561) is provided with a group of valves, the liquid pump (57) is connected to the liquid storage tank (58), and the liquid pump (57) has a two-way liquid discharge function.

2. A power distribution cabinet with emergency dehumidification function according to claim 1, characterized in that: A temperature detector is arranged inside the working chamber (11), a protective chamber (13) and a sealing chamber (14) are arranged below the working chamber (11), the sealing chamber (14) is connected to the air inlet box (4) via a protective pipe, the protective chamber (13) is a heat-insulating environment and is filled with a fire-extinguishing medium, and a sealing mechanism is arranged inside the sealing chamber (14), and the sealing mechanism is electrically connected to the temperature detector.

3. The power distribution cabinet with emergency dehumidification function according to claim 1, characterized in that: An alarm groove (59) is also provided in the dehumidifier seat (5); one end of the alarm groove (59) is connected to the air inlet passage (52) via a pressure relief valve, and the other end of the alarm groove (59) is connected to the external environment; the alarm groove (59) is a whistle-shaped structure, and a ball bearing is provided in the alarm groove (59).

4. The power distribution cabinet with emergency dehumidification function according to claim 1, characterized in that: The lead-in mechanism (3) comprises a fixing frame (31), the fixing frame (31) being fixedly mounted on the cabinet (1), a plurality of groups of lead-in holes (32) being arranged at one end of the fixing frame (31) close to the working chamber (11), a group of air bags (36) being arranged inside each group of the lead-in holes (32), an air storage tank (33) and an air cylinder (39) being arranged below the lead-in holes (32), the air storage tank (33) being connected to the plurality of groups of air bags (36) via a shunt channel (38), compressed gas and a piston being arranged in the air storage tank (33), the piston being connected to the air cylinder (39), and a first piezoelectric sheet being arranged at one end of the piston away from the air cylinder (39).

5. The power distribution cabinet with emergency dehumidification function according to claim 4, characterized in that: A plurality of groups of second sensing slots (37) are arranged at one end of the fixing frame (31) away from the working chamber (11); each group of the lead holes (32) is aligned with a group of the second sensing slots (37); a group of support plates (35) are arranged inside each group of the second sensing slots (37); a group of first sensing slots (34) are arranged below each group of the second sensing slots (37); each group of the support plates (35) is connected to a group of the first sensing slots (34) via a sensing spring; and a second piezoelectric sheet is arranged at one end of the support plate (35) close to the sensing spring.

6. The power distribution cabinet with emergency dehumidification function according to claim 2, characterized in that: The protective cavity (13) and the sealing cavity (14) are connected via a through hole; the sealing mechanism comprises a sealing plate (141) and an electromagnet (142); the sealing plate (141) is arranged at one end of the sealing cavity (14) close to the through hole via a sealing spring rod; the electromagnet (142) is arranged at one end of the sealing cavity (14) close to the protective pipe; a heat conducting plate (113) is arranged at the bottom of the working cavity (11); an emergency frame (131) is arranged inside the protective cavity (13); an emergency groove (1311) is arranged inside the emergency frame (131); a heat conducting rod (1313), emergency gas and a push rod (1312) are arranged inside the emergency groove (1311); the heat conducting rod (1313) is connected to the heat conducting plate (113); and the push rod (1312) is connected to the sealing plate (141).

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