CN112864826B - Low-voltage switch cabinet with continuous dehumidification function in cabinet - Google Patents

Abstract

The invention discloses a low-voltage switch cabinet with a continuous dehumidification function in the cabinet, comprising a switch cabinet body and a dehumidification box, wherein an intake pipe and an air return pipe are fixedly connected together between the switch cabinet body and the dehumidification box. The air intake duct is located below the return air duct, an axial flow fan and a filter assembly are arranged in the middle of the air intake duct, and the filter assembly is located on the side close to the switch cabinet, and the upper part of the inner cavity of the dehumidification box is provided with a secondary dehumidification assembly, The left side wall of the inner cavity of the dehumidification box is equidistantly provided with at least three installation grooves, and each installation groove is correspondingly provided with a condensation component, the right end of the dehumidification box is provided with a drainage component, and the left end of the dehumidification box is fixedly installed with a The cooling fins and the control box are movably installed on the upper part of the rear end of the dehumidification box with a single door. The low-voltage switch cabinet with the function of continuous dehumidification in the cabinet according to the present invention can continuously dehumidify the inside of the switch cabinet, does not occupy the space in the cabinet, has good dehumidification effect, and is suitable for promotion.

Description

A low-voltage switch cabinet with continuous dehumidification function in the cabinet

technical field

The invention relates to the related field of electrical cabinets, in particular to a low-voltage switch cabinet with a function of continuous dehumidification in the cabinet.

Background technique

Low-voltage switchgear is a product listed in the "Catalogue" of 3C Certification Compulsory Certification Products. It is suitable for power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings and other industries, as power transmission, distribution and power conversion. Low-voltage switchgear can be divided into GCS type low-voltage switchgear, GCK withdrawable switchgear, GGD low-voltage fixed switchgear, assembled low-voltage switchgear, etc.

In summer, especially in the rainy season, the weather is humid and hot, and the long-term operation of equipment such as circuit breakers inside the switch cabinet will generate heat, which will eventually cause condensation in the high and low voltage cabinets in the substation. The switchgear has a high protection level, and its heat dissipation and ventilation conditions are poor. Condensation is formed due to the good sealing, and it adheres to the insulating surface to accelerate the deterioration of the insulating medium, causing the circuit breaker to trip or electrical equipment to be damaged. After several years of operation of the switchgear hanging on the grid, the problem of equipment discharge and heating is very prominent. A large part of the reason is that the dehumidification and cooling effect of the switchgear is not good. The tightness of the switch cabinet and the cable trench is not up to the requirements or the long-term operation will inevitably cause moisture to enter from the small gap. If the condensation is serious, ionization will occur, and ozone will be generated at the same time, which will affect the normal operation of the switchgear and even cause accidents. Therefore, it is very necessary to conduct timely cooling and dehumidification of the switch cabinet.

In the prior art, most of the dehumidification devices used in switch cabinets are relatively simple in structure, and it is difficult to perform continuous dehumidification and automatic dehumidification, and the dehumidification effect is not ideal, and most of the dehumidification devices are installed inside the switch cabinet. In view of this, the present inventor proposes a low-voltage switchgear with the function of continuous dehumidification in the cabinet.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide a low-voltage switch cabinet with a continuous dehumidification function in the cabinet, which can effectively solve the problems in the background technology.

To achieve the above object, the technical scheme adopted in the present invention is:

A low-voltage switch cabinet with continuous dehumidification function in the cabinet, including a switch cabinet body and a dehumidification box, an air intake pipe and a return air pipe are fixedly connected together between the switch cabinet body and the dehumidification box, and the air intake pipe is located in the Below the return air duct, and the switch cabinet body and the dehumidification box are connected through the air intake duct and the return air duct, an axial flow fan and a filter assembly are arranged in the middle of the air intake duct, and the filter assembly is located on the side close to the switch cabinet body, The upper part of the inner cavity of the dehumidification box is provided with a secondary dehumidification component, the left side wall of the inner cavity of the dehumidification box is equidistantly provided with at least three installation grooves, and each installation groove is correspondingly provided with a condensation component, and the dehumidification box The right end is provided with a drainage assembly, the left end of the dehumidification box is fixedly installed with heat dissipation fins and a control box, and a single door is movably installed on the upper part of the rear end of the dehumidification box.

Preferably, the drainage assembly includes at least three water receiving boxes, all of the water receiving boxes are fixedly installed on the right side wall of the dehumidification box, and the water receiving boxes are all cuboid structures with a hollow interior and an open upper end, and the left part of the water receiving box is Protruding into the inner cavity of the dehumidification box, the part of the rear end of the water receiving box located outside the dehumidification box is fixedly connected with a drainage branch pipe, and one end of the drainage branch pipe away from the water receiving box is fixedly installed with a vertical drainage main pipe.

Preferably, the filter assembly includes a vertical plate, a filter screen is fixedly installed in the middle of one end of the vertical plate, a chute is provided on both the top wall and the bottom wall of the inner cavity of the air intake duct, and the air intake Installation blocks are fixedly installed on the right side of the upper end and the right side of the lower end of the pipeline, and the upper right parts of the two installation blocks are provided with first installation holes that penetrate up and down, and the upper end of the vertical plate is provided with a second installation hole. The second mounting hole and the first mounting hole are jointly fixed and installed with a stable bolt.

Preferably, the filter screen is slidably connected in two chutes, and sealing gaskets are provided between the filter screen and the two chutes.

Preferably, the condensing assembly includes a semiconductor refrigeration sheet and a heat-conducting metal plate, the semiconductor refrigeration sheet is inlaid and fixed in the installation groove, the cooling end of the semiconductor refrigeration sheet faces the inner cavity of the dehumidification box, and the heat-conducting metal plate is close to the semiconductor The cooling end of the refrigerating sheet, the heating end of the semiconductor refrigerating sheet is in contact with the heat dissipation fins, and the end of the heat-conducting metal plate away from the semiconductor refrigerating sheet is fixedly installed with several guide rods, and the guide rod and the heat-conducting metal plate are One-piece molding structure, the upper ends of a plurality of the guide rods are fixedly connected with two mutually parallel stabilizing rods, and the front ends of the two stabilizing rods are fixedly installed with connecting plates, and the front ends of each of the connecting plates are provided with symmetrical through-holes. hole.

Preferably, the guide rod is a strip structure with the upper end surface flush with the horizontal plate and the lower end surface protruding downward, and the outer surface of each guide rod is coated with a hydrophobic coating, preferably a polytetrafluoroethylene coating , the guide rods are installed at an angle of 30° with the horizontal plane, and the ends of the guide rods away from the heat-conducting metal plate extend to the top of the opening of the water receiving tank.

Preferably, the secondary dehumidification assembly includes a mounting plate and a supporting plate, two mounting plates are provided and are respectively fixed and installed on the upper left side wall and the upper right side wall of the inner cavity of the dehumidification box, and the two mounting plates are of the same height, so A rectangular groove is opened in the middle of the upper end of the support plate, and a number of connecting rods are fixedly connected in the rectangular groove at equal distances. The lower end of the support plate is located on both sides of the rectangular groove. The horizontal parts of the L-shaped plates are symmetrically provided with two first screw holes that penetrate up and down, and the upper ends of the two mounting plates are provided with second screw holes at the positions corresponding to the first screw holes, and each group of corresponding The first screw hole and the second screw hole are jointly provided with a limiting bolt, and a solid desiccant is placed at the upper end of the support plate, and the solid desiccant is preferably a color-changing silica gel desiccant.

Preferably, a sealing ring is arranged at the connection between the single door and the dehumidification box, and an observation window is arranged in the middle of the single door.

Preferably, both the semiconductor refrigerating sheet and the axial flow fan are electrically connected to a control box, the control box is provided with a programming controller, and the switch cabinet is provided with a humidity sensor; the humidity sensor is provided with a maximum Threshold value and a minimum threshold value, when it detects that the humidity in the switch cabinet is higher than the highest threshold value, the axial flow fan and semiconductor refrigeration chip are started to work through the programming controller in the control box, when it detects that the humidity in the switch cabinet is lower than When the minimum threshold is reached, the axial flow fan and the semiconductor cooling chip are started to stop working through the programming controller in the control box.

Compared with the prior art, the present invention has the following beneficial effects:

The invention discloses a low-voltage switch cabinet with the function of continuous dehumidification in the cabinet: during actual operation, the humidity sensor is provided with a maximum threshold and a minimum threshold. When it detects that the humidity in the switch cabinet is higher than the maximum threshold, it passes The programming controller in the control box starts the axial flow fan and the semiconductor refrigeration piece, and the axial flow fan works to send the moisture in the switch cabinet into the dehumidification box, and the water vapor condenses into small water on the outer surface of the guide rod when it is cooled Because the guide rods are installed at an angle of 30° to the horizontal plane, and the end of the guide rods away from the heat-conducting metal plate extends to the top of the opening of the water receiving tank, so that the condensed water droplets slide down to the water receiving tank under the action of their own gravity. Collecting inside to achieve the purpose of dehumidification, when it detects that the humidity in the switch cabinet is lower than the minimum threshold, the axial flow fan and semiconductor refrigeration chip are started to stop working through the programming controller in the control box, which is highly efficient and energy-saving, and can continuously dehumidify and dehumidify. Good; in addition, by providing a filter assembly, in the actual working process, the sundries in the switch cabinet can be prevented from entering the air intake pipe and cause it to be blocked. The matching of the installation holes and the stable bolts can facilitate the regular removal of the filter screen for cleaning, and a gasket is arranged between the filter screen and the two chutes, and the use of the gasket can enhance the stability of the filter screen installation.

Description of drawings

Fig. 1 is the schematic diagram of the right rear perspective of a low-voltage switchgear with continuous dehumidification function in the cabinet according to the present invention;

Fig. 2 is a left rear perspective view of a low-voltage switchgear with continuous dehumidification function in the cabinet according to the present invention;

3 is a schematic diagram of the installation position of the drainage assembly of a low-voltage switchgear with continuous dehumidification function in the cabinet according to the present invention;

4 is a schematic diagram of the installation structure of a filter assembly of a low-voltage switchgear with continuous dehumidification in the cabinet according to the present invention;

5 is a schematic diagram of the connection between the condensing component and the cooling fins of a low-voltage switchgear with continuous dehumidification function in the cabinet according to the present invention;

6 is a schematic diagram of the overall structure of a condensing assembly of a low-voltage switchgear with continuous dehumidification in the cabinet according to the present invention;

7 is a cross-sectional view of a guide rod of a low-voltage switchgear with continuous dehumidification in the cabinet according to the present invention;

8 is a schematic structural diagram of a secondary dehumidification component of a low-voltage switchgear with a continuous dehumidification function in the cabinet according to the present invention.

In the figure: 1. Switch cabinet; 2. Dehumidification box; 3. Air intake duct; 4. Axial flow fan; 5. Filter assembly; 51. Vertical plate; 52. Filter screen; 53. Mounting block; 54. 1. Installation hole; 55. Second installation hole; 56. Chute; 57. Gasket; 58. Stable bolt; 6. Secondary dehumidification component; 61. Installation plate; 62. Support plate; 63. Connecting rod; 64. L-shaped plate; 65, first screw hole; 66, second screw hole; 67, limit bolt; 7, single door; 8, return air pipe; 9, control box; 10, condensing assembly; 101, semiconductor refrigeration chip ; 102, thermally conductive metal plate; 103, guide rod; 104, stabilizer rod; 105, connecting plate; 106, through hole; 11, drainage assembly; 111, water tank; 112, drainage branch pipe; 113, drainage main pipe; 12, Cooling fins; 13. Mounting slots.

Detailed ways

In order to make the technical means, creative features, achievement goals and effects realized by the present invention easy to understand, the present invention will be further described below with reference to the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, a specific orientation, and a specific orientation. The orientation configuration and operation are therefore not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense, for example, "connected" may be a fixed connection It can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Figure 1-8, a low-voltage switchgear with continuous dehumidification in the cabinet includes a switchgear body 1 and a dehumidification box 2, and an air intake duct 3 is fixedly connected between the switchgear body 1 and the dehumidification box 2. With the return air duct 8, the air intake duct 3 is located below the return air duct 8, and the switch cabinet 1 and the dehumidification box 2 are communicated with the return air duct 8 through the air intake duct 3, and an axial flow fan 4 is arranged in the middle of the air intake duct 3. and the filter assembly 5, and the filter assembly 5 is located on the side close to the switch cabinet 1, the upper part of the inner cavity of the dehumidification box 2 is provided with a secondary dehumidification assembly 6, and the left side wall of the inner cavity of the dehumidification box 2 is equidistantly provided with at least three installation slots 13, and each installation slot 13 is provided with a corresponding condensing assembly 10, the right end of the dehumidification box 2 is provided with a drainage assembly 11, the left end of the dehumidification box 2 is fixedly installed with a cooling fin 12 and a control box 9, and the upper part of the rear end of the dehumidification box 2 is movable A single door 7 is installed; wherein, a sealing ring is provided at the connection between the single door 7 and the dehumidification box 2, and an observation window is provided in the middle of the single door 7, and the observation window on the single door 7 can facilitate the situation in the dehumidification box 2. Observed.

Specifically, please refer to FIG. 3 , the drainage assembly 11 includes at least three water receiving boxes 111 . The water receiving boxes 111 are all fixedly installed on the right side wall of the dehumidification box 2 , and the water receiving boxes 111 are all of the cuboid structure with a hollow interior and an open upper end. The left part of the water tank 111 extends into the inner cavity of the dehumidification box 2, and the part of the rear end of the water tank 111 located outside the dehumidification box 2 is fixedly connected with a drainage branch pipe 112, and one end of the drainage branch pipe 112 away from the water receiving tank 111 is fixed and installed in a vertical direction. The drain main 113.

Wherein, the main drainage pipe 113 is in communication with a plurality of sub-drain pipes 112, and each sub-drain pipe 112 is in communication with the interior of the water receiving tank 111 connected to it. .

Please refer to FIG. 4 , the filter assembly 5 includes a vertical plate 51 , a filter screen 52 is fixedly installed in the middle of one end of the vertical plate 51 , and the top wall and the bottom wall of the inner cavity of the air inlet duct 3 are both provided with chute 56 , and the air intake Mounting blocks 53 are fixedly installed on the right side of the upper end and the right side of the lower end of the pipe 3 , and the upper and right parts of the two mounting blocks 53 are both provided with first mounting holes 54 penetrating up and down, and the upper end of the vertical plate 51 is provided with a second mounting hole 55 , the two second mounting holes 55 and the first mounting holes 54 are fixedly installed with a solid bolt 58 .

It should be noted that the filter screen 52 is slidably connected in the two chutes 56 , and a gasket 57 is provided between the filter screen 52 and the two chutes 56 . The air in the cabinet 1 is sent into the dehumidification box 2 through the air intake duct 3. During this process, the filter screen 52 can prevent the sundries in the switch cabinet from entering the air intake duct 3 and causing it to be blocked. The chute 56 , the second installation hole 55 , the first installation hole 54 and the stabilizing bolt 58 cooperate to facilitate the regular removal of the filter screen 52 for cleaning, and a gasket 57 is provided between the filter screen 52 and the two chute 56 . , the use of the gasket 57 can enhance the stability of the installation of the filter screen 52 .

Referring to FIGS. 5-7 , the condensing assembly 10 includes a semiconductor refrigeration sheet 101 and a heat-conducting metal plate 102 . The semiconductor refrigeration sheet 101 is inlaid and fixed in the installation groove 13 , and the cooling end of the semiconductor refrigeration sheet 101 faces the inner cavity of the dehumidification box 2 , and conducts heat. The metal plate 102 is close to the cooling end of the semiconductor refrigeration sheet 101, the heating end of the semiconductor refrigeration sheet 101 is in contact with the heat dissipation fin 12, and a plurality of guide rods 103 are fixedly installed at one end of the thermally conductive metal plate 102 away from the semiconductor refrigeration sheet 101, and The guide rods 103 and the heat-conducting metal plate 102 are integrally formed. The upper ends of the several guide rods 103 are fixedly connected with two mutually parallel stabilizing rods 104, and the front ends of the two stabilizing rods 104 are fixedly installed with connecting plates 105. The front ends of each connecting plate 105 are provided with symmetrical through holes 106 .

Wherein, the guide rod 103 is a strip-shaped structure with the upper end surface flush with the horizontal plate and the lower end surface protruding downward. The outer surface of each guide rod 103 is coated with a hydrophobic coating, preferably a polytetrafluoroethylene coating. The rods 103 are installed at an angle of 30° to the horizontal plane, and the ends of the guide rods 103 away from the heat-conducting metal plate 102 all extend above the opening of the water receiving box 111 .

It can be seen from this that when the semiconductor refrigeration sheet 101 is energized, the temperature of its refrigeration end decreases rapidly, and the temperature of the guide rod 103 can be reduced through the heat-conducting metal plate 102. The moisture is sent into the dehumidification box 2, and the water vapor condenses into small water droplets on the outer surface of the guide rod 103 after being cooled. One end of the plate 102 extends above the opening of the water receiving box 111, so that the condensed water droplets fall into the water receiving box 111 under the action of its own gravity for collection, and the outer surface of each guide rod 103 is coated with a hydrophobic coating. , preferably a polytetrafluoroethylene coating, so that the water droplets on the guide rod 103 can slide off faster.

Referring to FIG. 8 , the secondary dehumidification assembly 6 includes a mounting plate 61 and a supporting plate 62 . Two mounting plates 61 are provided and are respectively fixed and installed on the upper left side wall and the upper right side wall of the inner cavity of the dehumidification box 2 , and two installation plates 61 are installed. The height of the plate 61 is the same, a rectangular groove is opened in the middle of the upper end of the support plate 62, and a number of connecting rods 63 are fixedly connected in the rectangular groove at equal distances, and the lower end of the support plate 62 is located on both sides of the rectangular groove. Plate 64, and the horizontal parts of the two L-shaped plates 64 are symmetrically provided with two first screw holes 65 that penetrate up and down, and the upper ends of the two mounting plates 61 are provided with second screw holes 65 at positions corresponding to the first screw holes 65. A hole 66 is formed, and a limiting bolt 67 is provided in the corresponding first screw hole 65 and the second screw hole 66 of each group.

It should be noted that a solid desiccant is placed on the upper end of the support plate 62, and the solid desiccant is preferably a color-changing silica gel desiccant, which can be used to further absorb moisture, improve the drying degree of the air, and prevent the humid air from entering the switch cabinet 1 again. Inside, when the color-changing silica gel desiccant is saturated with moisture, its color changes, which can be observed through the observation window at the single door 7, and the entire support plate 62 is easy to remove to replace the color-changing silica gel desiccant.

In the present invention, the semiconductor refrigeration sheet 101 and the axial flow fan 4 are both electrically connected to the control box 9, the control box 9 is provided with a programming controller, and the switch cabinet 1 is provided with a humidity sensor; The sensor is provided with a maximum threshold value and a minimum threshold value. When it detects that the humidity in the switch cabinet 1 is higher than the maximum threshold value, the programming controller in the control box 9 starts the axial flow fan 4 and the semiconductor cooling chip 101 to work, and the shaft The flow fan 4 works to send the moisture in the switch cabinet 1 into the dehumidification box 2. After the water vapor is cooled, it condenses into small water droplets on the outer surface of the guide rod 103, because the guide rod 103 is 30° from the horizontal plane. Angle installation, and the end of the guide rod 103 away from the heat-conducting metal plate 102 extends above the opening of the water receiving tank 111, so that the condensed water droplets fall into the water receiving tank 111 under the action of its own gravity for collection to achieve the purpose of dehumidification. When it detects that the humidity in the switch cabinet 1 is lower than the minimum threshold, the programming controller in the control box 9 starts the axial flow fan 4 and the semiconductor refrigeration chip 101 to stop working, which is efficient and energy saving and has a good dehumidification effect.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments, and the descriptions in the above-mentioned embodiments and the description are only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and modifications fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A low-voltage switchgear with continuous dehumidification function in the cabinet, comprising a switchgear body (1) and a dehumidification box (2), characterized in that: between the switchgear body (1) and the dehumidification box (2) An air intake duct (3) and a return air duct (8) are fixedly connected together, the air intake duct (3) is located below the return air duct (8), and the switch cabinet (1) and the dehumidification box (2) pass through the air inlet duct (8). The air duct (3) is communicated with the return air duct (8), an axial flow fan (4) and a filter assembly (5) are arranged in the middle of the air intake duct (3), and the filter assembly (5) is located close to the switch cabinet. On one side of (1), the upper part of the inner cavity of the dehumidification box (2) is provided with a secondary dehumidification component (6), and at least three installation grooves (13) are equidistantly provided on the left side wall of the inner cavity of the dehumidification box (2). ), and each installation slot (13) is provided with a corresponding condensation assembly (10), the right end of the dehumidification box (2) is provided with a drainage assembly (11), and the left end of the dehumidification box (2) is fixedly installed with cooling fins A sheet (12) and a control box (9), a single door (7) is movably installed on the upper rear end of the dehumidification box (2), and the condensation assembly (10) includes a semiconductor refrigeration sheet (101) and a heat-conducting metal plate (102) ), the semiconductor refrigerating sheet (101) is inlaid and fixed in the installation groove (13), and the cooling end of the semiconductor refrigerating sheet (101) faces the inner cavity of the dehumidification box (2), and the heat conducting metal plate (102) is in close contact with The cooling end of the semiconductor refrigeration sheet (101), the heating end of the semiconductor refrigeration sheet (101) is in contact with the heat dissipation fin (12), and the end of the thermally conductive metal plate (102) away from the semiconductor refrigeration sheet (101) is fixedly installed There are several guide rods (103), and the guide rods (103) and the heat-conducting metal plate (102) are integrally formed, and the upper ends of the several guide rods (103) are fixedly connected with two mutually parallel stable rods (104), and connecting plates (105) are fixedly installed at the front ends of the two stabilizer bars (104), and symmetrical through holes (106) are opened at the front ends of each of the connecting plates (105). (101) and the axial flow fan (4) are electrically connected to the control box (9), the control box (9) is provided with a programming controller, and the switch cabinet (1) is provided with a humidity sensor, The humidity sensor is provided with a maximum threshold value and a minimum threshold value, and when it detects that the humidity in the switch cabinet (1) is higher than the maximum threshold value, the axial flow fan (4) is activated through the programming controller in the control box (9). ) and the semiconductor refrigeration sheet (101), when it detects that the humidity in the switch cabinet (1) is lower than the minimum threshold, the programming controller in the control box (9) starts the axial flow fan (4) and the semiconductor refrigeration The slice (101) stops working. 2 . The low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 1 , wherein the drainage assembly ( 11 ) comprises at least three water receiving tanks ( 111 ), and the water receiving tanks ( 111 ). 3 . ) are fixedly installed on the right side wall of the dehumidification box (2), and the water receiving box (111) is a cuboid structure with a hollow interior and an open upper end, and the left part of the water receiving box (111) extends into the dehumidification box (2). The part of the rear end of the water receiving box (111) located on the outside of the dehumidification box (2) is fixedly connected with a drainage branch pipe (112), and one end of the drainage branch pipe (112) away from the water receiving tank (111) is jointly fixed and installed with a vertical drainage pipe (112). direction of the drain main (113). 3 . The low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 1 , wherein the filter assembly ( 5 ) comprises a vertical plate ( 51 ), and the vertical plate ( 51 ) A filter screen (52) is fixedly installed in the middle of one end of the air inlet pipe (3), a chute (56) is provided on the top wall and the bottom wall of the inner cavity of the air inlet pipe (3), and the upper right side of the air inlet pipe (3) A mounting block (53) is fixedly installed on the right side of the lower end, and a first mounting hole (54) penetrating up and down is provided on the right portion of the upper end of the two mounting blocks (53), and a first mounting hole (54) is provided on the upper end of the vertical plate (51). Two mounting holes (55), two of the second mounting holes (55) and the first mounting hole (54) are fixedly mounted with a firm bolt (58). 4. A low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 3, characterized in that: the filter screen (52) is slidably connected in the two chutes (56), and the filter screen (52) is slidably connected to the two chutes (56). Sealing gaskets (57) are arranged between 52) and the two sliding grooves (56). 5. A low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 1, characterized in that: the guide rod (103) is the upper end surface of which is flush with the horizontal plate and the lower end surface protrudes downward. Strip structure, the outer surface of each guide rod (103) is coated with a hydrophobic coating, the hydrophobic coating is a polytetrafluoroethylene coating, and the guide rods (103) are all at 30° to the horizontal plane Angle installation, and one end of the guide rod (103) away from the heat-conducting metal plate (102) extends above the opening of the water receiving tank (111). 6. A low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 1, characterized in that: the secondary dehumidification assembly (6) comprises a mounting plate (61) and a support plate (62), the mounting Two plates (61) are provided and are respectively fixed and installed on the upper left side wall and the upper right side wall of the inner cavity of the dehumidification box (2), and the two mounting plates (61) are of the same height, and the middle part of the upper end of the support plate (62) A rectangular slot is provided, and a plurality of connecting rods (63) are fixedly connected at equal distances in the rectangular slot, and two L-shaped plates (64) are symmetrically and fixedly installed at the lower ends of the support plate (62) on both sides of the rectangular slot. , and the horizontal parts of the two L-shaped plates (64) are symmetrically provided with two first screw holes (65) that penetrate up and down, and the upper ends of the two mounting plates (61) correspond to the first screw holes (65) A second screw hole (66) is provided at each position, and a limiting bolt (67) is arranged in the corresponding first screw hole (65) and the second screw hole (66) of each group. The support plate (62) ), a solid desiccant is placed on the upper end, and the solid desiccant is a color-changing silica gel desiccant. 7. A low-voltage switchgear with continuous dehumidification function in the cabinet according to claim 1, characterized in that: a sealing ring is provided at the connection between the single door (7) and the dehumidification box (2), and the An observation window is arranged in the middle of the single door (7).

Images