Moisture-proof and heat-dissipation power distribution cabinet

Abstract

The invention relates to the related technical field of power distribution cabinets, in particular to a moisture-proof heat dissipation power distribution cabinet, a heat dissipation moisture-proof mechanism comprises an air inlet hole, an air outlet hole, a temperature sensor, a controller, a fan, a mesh enclosure, a sealing assembly and a moisture-proof assembly, the air inlet hole is formed in the surface of one side of a cabinet body, and the air outlet hole is formed in the surface of one side of the cabinet body; the inner side surface of the cabinet body is fixedly connected with a temperature sensor, and the inner side surface of the cabinet body is fixedly connected with a controller. When the cabinet body needs to be cooled, the temperature sensor senses that the temperature in the cabinet body is higher than a set normal temperature range and transmits information to the controller, then the controller starts the fan on one side of the inner wall of the cabinet body, and the fan starts to suck external air into the cabinet body from the air inlet hole in the corresponding side. And meanwhile, the controller starts the fan on the other side of the inner wall of the cabinet body to blow out hot air in the cabinet body from the air outlet holes, so that the temperature in the cabinet body is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field related to power distribution cabinets, and in particular to a moisture-proof and heat-dissipating power distribution cabinet. Background Art

[0002] The power distribution cabinet (PDC) is the core equipment of the power system, acting as the "command center" for electrical energy, responsible for rationally distributing incoming power to various electrical devices. Its technological development has evolved from simple manual control to intelligent management. Traditional PDCs primarily rely on basic components such as circuit breakers and fuses to implement circuit switching and protection functions. Modern PDCs, however, incorporate intelligent technologies such as automated control and remote monitoring. Advances in power electronics, communications, and materials science have enabled today's PDCs to not only provide basic protection against overloads, short circuits, and leakage, but also utilize sensors to collect real-time operating data, enabling remote monitoring and fault warnings through the Internet of Things (IoT).

[0003] During operation, components within existing power distribution cabinets generate significant heat due to prolonged operation. If the temperature inside the cabinet remains high, it accelerates component aging, reduces component lifespan, and may even cause equipment failure. Currently, most power distribution cabinets have cooling holes on their side walls to reduce temperature through natural convection. However, these cooling effects are often ineffective, as the convection speed of natural wind is limited, making it difficult to meet the continuous and efficient heat dissipation requirements of the power distribution cabinet. Summary of the Invention

[0004] The purpose of the present invention is to provide a moisture-proof and heat-dissipating distribution cabinet to solve the problem raised in the above background technology that most of the existing distribution cabinets are designed with heat dissipation holes on the side walls to reduce the temperature through natural convection, but the actual heat dissipation effect is often poor, and the convection speed of natural wind is limited, which makes it difficult to meet the continuous and efficient heat dissipation needs of the distribution cabinet.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a moisture-proof and heat-dissipating power distribution cabinet, comprising a cabinet body, an inner wall of the cabinet body being provided with a heat dissipation and moisture-proof mechanism, a cabinet door being installed on the cabinet body, a cleaning assembly being provided on the side wall of the cabinet body, a wire harness assembly being provided on the inner wall of the cabinet body, a shock-absorbing assembly being provided on the bottom of the cabinet body, an observation window being installed on the outer wall of the cabinet door, a door lock being provided on the outer wall of the cabinet door, and a handle being fixedly connected to the outer wall of the cabinet door; The heat dissipation and moisture-proof mechanism includes an air inlet, an air outlet, a temperature sensor, a controller, a fan, a mesh cover, a closing component and a moisture-proof component. An air inlet is provided on one side surface of the cabinet, an air outlet is provided on one side surface of the cabinet, a temperature sensor is fixedly connected to the inner surface of the cabinet, a controller is fixedly connected to the inner surface of the cabinet, a fan is installed on the inner surface of the cabinet, a mesh cover is fixedly connected to the inner surface of the cabinet, a closing component is provided on the inner surface of the cabinet, and a moisture-proof component is provided on the bottom of the cabinet.

[0006] Preferably, the closing component includes a fixed frame, a slide groove, a baffle, a fixed block, a threaded column and a driving member. The inner wall surface of the cabinet is fixedly connected to the fixed frame, the upper wall surface of the fixed frame is provided with a slide groove, the inner side surface of the slide groove is slidably connected to the baffle, the outer wall surface of the baffle is fixedly connected to the fixed block, the outer wall surface of the fixed block is threadedly connected to the threaded column, and one end surface of the threaded column passes through the fixed frame and is fixedly connected to the rotating shaft of the driving member.

[0007] Preferably, the fixing frame is symmetrically arranged with respect to the central axis of the cabinet, and the inner wall size of the sliding groove is consistent with the outer wall size of the baffle.

[0008] Preferably, the moisture-proof component includes a base, a first air vent and a second air vent; the bottom of the cabinet is fixedly connected to the base; one side surface of the base is provided with a first air vent; and one side surface of the base is provided with a second air vent.

[0009] Preferably, the wiring harness assembly includes a limiting block, a receiving groove, a through groove, a partition, a limiting tube, a fixed column, a connecting piece, a first spring and a pull ring. The inner wall surface of the cabinet is fixedly connected with the limiting block, the outer wall surface of the limiting block is provided with a receiving groove, the outer wall surface of the limiting block is equidistantly provided with through grooves, the inner wall of the receiving groove is equidistantly installed with partitions, the outer wall surface of the limiting block is through-connected with the limiting tube, the inner wall surface of the limiting tube is slidably connected with a fixing column, one end surface of the fixing column is fixedly connected with a connecting piece, the outer side of the limiting tube is provided with a first spring, and the outer wall surface of the connecting piece is fixedly connected with a pull ring.

[0010] Preferably, the inner wall size of the through groove matches the outer wall size of the partition, and the two ends of the first spring are respectively connected to the limiting block and the connecting piece.

[0011] Preferably, the first springs are distributed equidistantly on the outer wall of the limiting block, and the limiting tubes are distributed equidistantly on the outer wall of the limiting block.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) Through the setting of air inlet, air outlet, temperature sensor, controller, fan, mesh cover, sealing component and moisture-proof component, when the cabinet needs to dissipate heat, the temperature sensor senses that the temperature inside the cabinet is higher than the set normal temperature range and transmits the information to the controller. Then the controller starts the fan on one side of the inner wall of the cabinet. The fan starts to draw external air into the cabinet from the air inlet on the corresponding side. At the same time, the controller starts the fan on the other side of the inner wall of the cabinet to blow the hot air inside the cabinet out of the air outlet, thereby controlling the temperature inside the cabinet.

[0013] (2) When the air outside the cabinet is humid and the inside of the cabinet needs to be isolated from the outside, the staff starts the driving part through the external control device, and the rotating shaft of the driving part drives the threaded column to rotate. Since the fixed block is threadedly connected to the threaded column, and the fixed block is restricted by the slide groove through the baffle and can only move in the slide groove and cannot rotate with the threaded column, the fixed block drives the baffle to move downward along the inner wall of the slide groove to block the corresponding air inlet and outlet holes to prevent internal and external air circulation. The base can lift the cabinet to prevent the bottom of the cabinet from contacting the ground and getting damp. The first ventilation groove and the second ventilation groove can enhance the air flow inside the base to prevent the base from getting damp, thereby indirectly preventing the bottom of the cabinet from getting damp.

[0014] (3) When the lines in the cabinet need to be sorted, the staff first pulls the pull ring by hand, and the pull ring transfers the pulling force to the connecting piece, so that the connecting piece drives the fixed column to move outward on the inner wall of the limiting tube. At this time, the first spring is stretched as the connecting piece moves. When one end of the fixed column completely leaves the storage slot and drives the partition to move in the through slot, a gap appears between the partition and the inner wall of the storage slot. At this time, the cable is placed in the interlayer between the corresponding storage slot and the partition, and then the hand pulling the pull ring is released, so that the partition is close to the inner wall of the storage slot again under the force of the partition's reset to limit the cable. In this way, different cables are separated and will not contact and affect each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the structure of the temperature sensor and controller used in conjunction with each other in the present invention; Figure 3 This is a schematic structural diagram of the wiring harness assembly of the present invention; Figure 4 This is a schematic diagram of the cleaning component structure of the present invention; Figure 5 This is a schematic structural diagram of the heat dissipation and moisture-proof mechanism of the present invention; In the figure: 1, cabinet; 2, heat dissipation and moisture-proof mechanism; 21, air inlet; 22, air outlet; 23, temperature sensor; 24, controller; 25, fan; 26, mesh cover; 27, closing assembly; 271, fixing frame; 272, slide; 273, baffle; 274, fixing block; 275, threaded column; 276, driving member; 28, moisture-proof assembly; 281, base; 282, first ventilation groove; 283, Second ventilation groove; 3. Cabinet door; 4. Cleaning assembly; 41. Electric push rod; 42. Limiting plate; 43. First limiting strip; 44. Scraper; 45. First limiting groove; 5. Wiring assembly; 51. Limiting block; 52. Storage groove; 53. Through groove; 54. Partition; 55. Limiting tube; 56. Fixed column; 57. Connecting piece; 58. First spring; 59. Pull ring; 6. Observation window; 7. Door lock; 8. Handle. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-5 The present invention provides a technical solution: a moisture-proof and heat-dissipating distribution cabinet, comprising a cabinet body 1, an inner wall of the cabinet body 1 is provided with a heat dissipation and moisture-proof mechanism 2, a cabinet door 3 is installed on the cabinet body 1, a cleaning component 4 is provided on the side wall of the cabinet body 1, a wiring assembly 5 is provided on the inner wall of the cabinet body 1, an observation window 6 is installed on the outer wall of the cabinet door 3, a door lock 7 is provided on the outer wall of the cabinet door 3, and a handle 8 is fixedly connected to the outer wall of the cabinet door 3.

[0018] The heat dissipation and moisture-proof mechanism 2 includes an air inlet 21, an air outlet 22, a temperature sensor 23, a controller 24, a fan 25, a mesh cover 26, a closing component 27 and a moisture-proof component 28. An air inlet 21 is provided on one side surface of the cabinet 1, an air outlet 22 is provided on one side surface of the cabinet 1, a temperature sensor 23 is fixedly connected to the inner surface of the cabinet 1, a controller 24 is fixedly connected to the inner surface of the cabinet 1, a fan 25 is installed on the inner surface of the cabinet 1, a mesh cover 26 is fixedly connected to the inner surface of the cabinet 1, a closing component 27 is provided on the inner surface of the cabinet 1, and a moisture-proof component 28 is provided at the bottom of the cabinet 1. 21, air outlet 22, temperature sensor 23, controller 24, fan 25, mesh cover 26, sealing component 27 and moisture-proof component 28 are set. When the cabinet 1 needs to dissipate heat, the temperature sensor 23 senses that the temperature inside the cabinet 1 is higher than the set normal temperature range and transmits the information to the controller 24. Then the controller 24 starts the fan 25 on one side of the inner wall of the cabinet 1. The fan 25 starts to suck the external air into the cabinet 1 from the air inlet 21 on the corresponding side. At the same time, the controller 24 starts the fan 25 on the other side of the inner wall of the cabinet 1 to blow the hot air inside the cabinet 1 out of the air outlet 22, thereby controlling the temperature inside the cabinet 1.

[0019] The closing assembly 27 includes a fixed frame 271, a slide groove 272, a baffle 273, a fixed block 274, a threaded column 275 and a driving member 276. The inner wall surface of the cabinet 1 is fixedly connected to the fixed frame 271, the upper wall surface of the fixed frame 271 is provided with a slide groove 272, the inner side surface of the slide groove 272 is slidably connected to the baffle 273, the outer wall surface of the baffle 273 is fixedly connected to the fixed block 274, the outer wall surface of the fixed block 274 is threadedly connected to the threaded column 275, one end surface of the threaded column 275 passes through the fixed frame 271 and is fixedly connected to the rotating shaft of the driving member 276. The setting of the fixed block 274, the threaded column 275 and the driving member 276 is that when the air outside the cabinet 1 is humid and the interior of the cabinet 1 needs to be isolated from the outside, the staff starts the driving member 276 through the external control device, and the rotating shaft of the driving member 276 drives the threaded column 275 to rotate. Since the fixed block 274 is threadedly connected to the threaded column 275, and the fixed block 274 is restricted by the slide groove 272 through the baffle 273 and can only rotate in the slide groove 272 and cannot rotate with the threaded column 275, the fixed block 274 drives the baffle 273 to move downward along the inner wall of the slide groove 272 to block the corresponding air inlet 21 and air outlet 22 to prevent internal and external air circulation.

[0020] The contact surfaces of the baffle 273 and the corresponding air inlet 21 and air outlet 22 are provided with rubber sealing strips to ensure complete sealing.

[0021] The outside of the air hole 21 and the air outlet 22 is also provided with electrically openable and closable waterproof shutters, which are automatically closed on rainy days to prevent rainwater from entering the cabinet through the air hole 21 and the air outlet 22.

[0022] The fixing frame 271 is symmetrically arranged with respect to the central axis of the cabinet 1 . The inner wall size of the slide groove 272 matches the outer wall size of the baffle 273 . The baffle 273 can slide in the slide groove 272 through the arrangement of the slide groove 272 .

[0023] The moisture-proof component 28 includes a base 281, a first air permeable groove 282 and a second air permeable groove 283. The bottom of the cabinet 1 is fixedly connected to the base 281. The first air permeable groove 282 is provided on one side surface of the base 281, and the second air permeable groove 283 is provided on one side surface of the base 281. Through the arrangement of the base 281, the first air permeable groove 282 and the second air permeable groove 283, the base 281 can lift the cabinet 1 to prevent the bottom of the cabinet 1 from contacting the ground and getting damp. The first air permeable groove 282 and the second air permeable groove 283 can enhance the air flow inside the base 281 to prevent the base 281 from getting damp, thereby indirectly preventing the bottom of the cabinet 1 from getting damp.

[0024] A moisture-proof agent box is provided inside the base 281, which contains silica gel desiccant; the bottom of the first air permeable groove 282 and the second air permeable groove 283 is inclined with the inside higher and the outside lower. When there is condensed water on the first air permeable groove 282 and the second air permeable groove 283, the water droplets will naturally flow out along the bottom of the groove, effectively preventing it from flowing into the interior of the cabinet.

[0025] The cleaning assembly 4 includes an electric push rod 41, a limiting plate 42, a first limiting strip 43, a scraper 44 and a first limiting groove 45. The outer wall surface of the cabinet 1 is respectively installed with an electric push rod 41, a limiting plate 42 is installed on one side surface of the electric push rod 41, a first limiting strip 43 is fixedly connected to one side surface of the limiting plate 42, a first limiting strip 43 is slidably connected to the scraper 44 on one side surface of the limiting plate 42, and a first limiting groove 45 is opened on both sides of the scraper 44. , the scraper 44 and the first limiting groove 45 are set. When dust on the outer walls of the air inlet 21 and the air outlet 22 hinders the air circulation inside and outside the cabinet 1, the staff starts the electric push rod 41 through the external control device, and one end of the electric push rod 41 applies force to the scraper 44. In this way, the scraper 44 moves up and down in the first limiting groove 45 under the restriction of the first limiting strip 43 and the first limiting groove 45, so that the scraper 44 scrapes off the dust on the outer walls of the air inlet 21 and the air outlet 22 to avoid affecting the heat dissipation effect.

[0026] The outer wall size of the first limiting strip 43 matches the inner wall size of the first limiting groove 45 . The first limiting strip 43 is symmetrically arranged with respect to the central axis of the cabinet 1 . The arrangement of the first limiting groove 45 allows the first limiting strip 43 to slide in the first limiting groove 45 .

[0027] The electric push rod 41 is symmetrically arranged with respect to the central axis of the cabinet 1 , and the limiting plate 42 is symmetrically arranged with respect to the central axis of the cabinet 1 . Through the arrangement of the electric push rod 41 , the output end of the electric push rod 41 can apply thrust to the scraper 44 .

[0028] The wiring harness assembly 5 includes a limiting block 51, a receiving groove 52, a through groove 53, a partition 54, a limiting tube 55, a fixed column 56, a connecting piece 57, a first spring 58 and a pull ring 59. The inner wall surface of the cabinet 1 is fixedly connected with the limiting block 51, the outer wall surface of the limiting block 51 is provided with a receiving groove 52, the outer wall surface of the limiting block 51 is equidistantly provided with a through groove 53, the inner wall surface of the storing groove 52 is equidistantly installed with a partition 54, the outer wall surface of the limiting block 51 is connected with the limiting tube 55, the inner wall surface of the limiting tube 55 is slidably connected with a fixing column 56, one end surface of the fixing column 56 is fixedly connected with a connecting piece 57, the outer sleeve of the limiting tube 55 is provided with a first spring 58, the outer wall surface of the connecting piece 57 is fixedly connected with a pull ring 59, The arrangement of the column 56, the connecting piece 57, the first spring 58 and the pull ring 59, when the lines in the cabinet 1 need to be sorted, the staff first pulls the pull ring 59 by hand, and the pull ring 59 transfers the tension to the connecting piece 57, so that the connecting piece 57 drives the fixed column 56 to move outward on the inner wall of the limiting tube 55. At this time, the first spring 58 is stretched as the connecting piece 57 moves. When one end of the fixed column 56 completely leaves the storage groove 52 and drives the partition 54 to move in the through groove 53, a gap appears between the partition 54 and the inner wall of the storage groove 52. At this time, the cable is placed in the interlayer between the corresponding storage groove 52 and the partition 54, and then the hand pulling the pull ring 59 is released, so that the partition 54 is again close to the inner wall of the storage groove 52 under the force of the partition 54 resetting to limit the cable. In this way, different cables are separated and will not contact and affect each other.

[0029] The inner wall size of the through-slot 53 matches the outer wall size of the partition 54 , and both ends of the first spring 58 are connected to the limiting block 51 and the connecting piece 57 respectively.

[0030] The first springs 58 are equidistantly distributed on the outer wall of the limiting block 51 , and the limiting tubes 55 are equidistantly distributed on the outer wall of the limiting block 51 .

[0031] Working principle: When the cabinet 1 needs to dissipate heat, the temperature sensor 23 senses that the temperature inside the cabinet 1 is higher than the set normal temperature range and transmits the information to the controller 24. Then the controller 24 starts the fan 25 on one side of the inner wall of the cabinet 1. The fan 25 starts to suck the external air into the cabinet 1 from the air inlet 21 on the corresponding side. At the same time, the controller 24 starts the fan 25 on the other side of the inner wall of the cabinet 1 to blow the hot air inside the cabinet 1 out from the air outlet 22, thereby controlling the temperature inside the cabinet 1. When the air outside the cabinet 1 is humid and the inside of the cabinet 1 needs to be isolated from the outside, the staff starts the driving member 276 through the external control device to drive the The rotating shaft of the movable member 276 drives the threaded column 275 to rotate, and since the fixed block 274 is threadedly connected to the threaded column 275, and the fixed block 274 is restricted by the slide groove 272 through the baffle 273 and can only move in the slide groove 272 and cannot rotate with the threaded column 275, the fixed block 274 drives the baffle 273 to move downward along the inner wall of the slide groove 272 to block the corresponding air inlet 21 and air outlet 22 to prevent internal and external air circulation. The base 281 can lift the cabinet 1 to prevent the bottom of the cabinet 1 from contacting the ground and getting wet. The first ventilation groove 282 and the second ventilation groove 283 can strengthen the air flow inside the base 281 to avoid the base The seat 281 is damp, thereby indirectly preventing the bottom of the cabinet 1 from getting damp; when dust on the outer walls of the air inlet 21 and the air outlet 22 hinders the air circulation inside and outside the cabinet 1, the staff starts the electric push rod 41 through the external control device, and one end of the electric push rod 41 applies force to the scraper 44, so that the scraper 44 moves up and down in the first limiting groove 45 under the restriction of the first limiting strip 43 and the first limiting groove 45, so that the scraper 44 scrapes the dust on the outer walls of the air inlet 21 and the air outlet 22 to avoid affecting the heat dissipation effect; when the wiring in the cabinet 1 needs to be tidied, the staff first pulls the pull ring 59 by hand, and the pull ring 59 transmits the pulling force Pass it to the connecting piece 57, so that the connecting piece 57 drives the fixing column 56 to move outward on the inner wall of the limiting tube 55. At this time, the first spring 58 is stretched as the connecting piece 57 moves. When one end of the fixing column 56 completely leaves the storage groove 52 and drives the partition 54 to move in the through groove 53, a gap appears between the partition 54 and the inner wall of the storage groove 52. At this time, the cable is placed in the interlayer between the corresponding storage groove 52 and the partition 54, and then the hand pulling the pull ring 59 is released, so that the partition 54 is again tightly attached to the inner wall of the storage groove 52 under the force of the partition 54 resetting to limit the cable. In this way, different cables are separated and will not contact and affect each other.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A moisture-proof and heat-dissipating power distribution cabinet, comprising a cabinet body (1), characterized in that: The inner wall of the cabinet (1) is provided with a heat dissipation and moisture-proof mechanism (2), a cabinet door (3) is installed on the cabinet (1), a cleaning assembly (4) is provided on the side wall of the cabinet (1), a wiring assembly (5) is provided on the inner wall of the cabinet (1), an observation window (6) is installed on the outer wall of the cabinet door (3), a door lock (7) is provided on the outer wall of the cabinet door (3), and a handle (8) is fixedly connected to the outer wall of the cabinet door (3); The heat dissipation and moisture-proof mechanism (2) comprises an air inlet (21), an air outlet (22), a temperature sensor (23), a controller (24), a fan (25), a mesh cover (26), a closing component (27) and a moisture-proof component (28). An air inlet (21) is provided on one side surface of the cabinet (1), an air outlet (22) is provided on one side surface of the cabinet (1), a temperature sensor (23) is fixedly connected to the inner surface of the cabinet (1), a controller (24) is fixedly connected to the inner surface of the cabinet (1), a fan (25) is installed on the inner surface of the cabinet (1), a mesh cover (26) is fixedly connected to the inner surface of the cabinet (1), a closing component (27) is provided on the inner surface of the cabinet (1), and a moisture-proof component (28) is provided on the bottom of the cabinet (1).

2. A moisture-proof and heat-dissipating power distribution cabinet according to claim 1, characterized in that: The closing assembly (27) comprises a fixed frame (271), a slide groove (272), a baffle (273), a fixed block (274), a threaded column (275) and a driving member (276); the inner wall surface of the cabinet (1) is fixedly connected to the fixed frame (271); the upper wall surface of the fixed frame (271) is provided with a slide groove (272); the inner side surface of the slide groove (272) is slidably connected to the baffle (273); the outer wall surface of the baffle (273) is fixedly connected to the fixed block (274); the outer wall surface of the fixed block (274) is threadedly connected to the threaded column (275); one end surface of the threaded column (275) passes through the fixed frame (271) and is fixedly connected to the rotating shaft of the driving member (276).

3. The moisture-proof and heat-dissipating power distribution cabinet according to claim 2, characterized in that: The fixing frame (271) is symmetrically arranged with respect to the central axis of the cabinet (1), and the inner wall size of the sliding groove (272) matches the outer wall size of the baffle (273).

4. The moisture-proof and heat-dissipating power distribution cabinet according to claim 1, characterized in that: The moisture-proof component (28) comprises a base (281), a first ventilation groove (282) and a second ventilation groove (283); the bottom of the cabinet (1) is fixedly connected to the base (281); a first ventilation groove (282) is provided on one side surface of the base (281); and a second ventilation groove (283) is provided on one side surface of the base (281).

5. The moisture-proof and heat-dissipating power distribution cabinet according to claim 1, characterized in that: The harness assembly (5) comprises a limiting block (51), a receiving groove (52), a through groove (53), a partition (54), a limiting tube (55), a fixing column (56), a connecting piece (57), a first spring (58) and a pull ring (59); the inner wall surface of the cabinet (1) is fixedly connected with the limiting block (51); the outer wall surface of the limiting block (51) is provided with a receiving groove (52); the outer wall surface of the limiting block (51) is provided with through grooves (53) at equal intervals; the inner wall of the receiving groove (52) is equidistantly provided with a partition (54); the outer wall surface of the limiting block (51) is through-connected with the limiting tube (55); the inner wall surface of the limiting tube (55) is slidably connected with the fixing column (56); one end surface of the fixing column (56) is fixedly connected with the connecting piece (57); the outer surface of the limiting tube (55) is sleeved with the first spring (58); and the outer wall surface of the connecting piece (57) is fixedly connected with the pull ring (59).

6. The moisture-proof and heat-dissipating power distribution cabinet according to claim 5, characterized in that: The inner wall size of the through groove (53) matches the outer wall size of the partition (54), and the two ends of the first spring (58) are respectively connected to the limiting block (51) and the connecting piece (57).

7. The moisture-proof and heat-dissipating power distribution cabinet according to claim 6, characterized in that: The first springs (58) are distributed equidistantly on the outer wall of the limiting block (51), and the limiting tubes (55) are distributed equidistantly on the outer wall of the limiting block (51).

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