Anti-seismic structure of box-type substation

Abstract

The utility model discloses an anti-seismic structure of a box-type substation, and relates to the technical field of electric power engineering. The transformer substation comprises a base and a transformer substation body, the transformer substation body is arranged at the top of the base through a mounting assembly, and moisture-proof assemblies are further arranged on the two sides in the base; the mounting assembly comprises a movable plate movably connected to the upper portion of the inner side of the base, a third through groove and a sliding groove are formed in the center position and the periphery of the surface of the movable plate correspondingly, a lead screw is rotationally connected into the sliding groove, the lead screw is sleeved with a sliding block in a threaded mode, and a clamping plate is welded to the top of the sliding block. According to the utility model, the screw rod in the mounting assembly drives the clamping plate to clamp the transformer substation body on the movable plate, so that the problem that the transformer substation body and the anti-seismic structure are inconvenient to mount and dismount in the prior art is solved, and air in the base is sucked into the dehumidification box through the exhaust fan; and meanwhile, water in the air is absorbed through the water absorption filler in the filler frame, and the problem that an existing anti-seismic structure is inconvenient to prevent moisture is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric power engineering, in particular to an earthquake-resistant structure of a box-type transformer substation. Background Art

[0002] Box-type substation, also known as prefabricated substation or prefabricated substation, is a kind of transformer step-down, low-voltage power distribution and other functions organically combined together, installed inside a steel structure box, is one of the common basic equipment in power engineering, widely used in mines, factories, oil and gas fields and wind power stations, is a new type of complete set of power distribution equipment, and in the use of box-type substation, in order to avoid vibration and damage to the internal electronic components, usually through the seismic structure to install the box-type substation;

[0003] The document with the existing publication number CN216016186U discloses a box-type substation with earthquake resistance, including a base, a support rod and a movable plate, a fixed column is arranged at the bottom of the movable plate, a connecting rod is arranged at the lower end of the fixed column, two groups of connecting rods are arranged, one end of the two groups of connecting rods are connected to a slider, a sliding rod is arranged on the inner side of the slider, fixed blocks are arranged at both ends of the sliding rod, a second spring is arranged on the outer side of both ends of the sliding rod, the bottom of the fixed block is fixed to the surface of the base, a shock-absorbing rod is arranged at the bottom of both ends of the movable plate, a second baffle is arranged on the surface of the shock-absorbing rod, a shock-absorbing column is arranged at the lower end of the shock-absorbing rod, the bottom of the shock-absorbing column is fixed to the upper end of the base, a first baffle is arranged on the inner wall of the shock-absorbing column, and a first spring is arranged at the upper end of the first baffle;

[0004] However, it still has the following disadvantages in actual use:

[0005] 1. The above-mentioned box-type substation with earthquake resistance has an internal movable plate connected to the base, and a substation is arranged on the movable plate. The substation and the base are installed by the movable plate, and the substation is earthquake-resistant by the first spring, the second spring and the third spring on the base. However, when in use, it is not convenient to quickly install the substation on the movable plate, which makes it inconvenient to construct it;

[0006] 2. The above-mentioned earthquake-resistant box-type substation has a movable plate movably connected inside its base, and a substation is arranged on the movable plate. The substation and the base are installed by the movable plate, and the substation is earthquake-resistant by the first spring, the second spring and the third spring on the base. However, when in use, the interior of the base lacks a moisture-proof structure, and since the base is directly installed on the ground, moisture on the ground will penetrate into the interior of the substation through the base, and the moisture inside the base will also affect the use of structures such as the first spring and the second spring.

[0007] To this end, we provide a seismic-resistant structure of a box-type substation to solve the above-mentioned problems. Utility Model Content

[0008] The utility model aims to provide an earthquake-resistant structure of a box-type substation, which clamps the substation body on a movable plate by driving a clamping plate through a screw rod in an installation assembly, thereby solving the problem that it is inconvenient to install and disassemble the substation body and the earthquake-resistant structure. The air in the base is drawn into the dehumidification box through an exhaust fan, and the moisture in the air is absorbed by the water-absorbing filler in the filler frame, thereby solving the problem that the existing earthquake-resistant structure is inconvenient to be moisture-proof.

[0009] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0010] The utility model is an earthquake-resistant structure of a box-type substation, comprising a base and a substation body, wherein the substation body is arranged on the top of the base through an installation component, and moisture-proof components are also arranged on both sides of the interior of the base;

[0011] The installation assembly includes a movable plate movably connected to the upper inner side of the base, a third through groove and a slide groove are respectively provided at the center position and around the surface of the movable plate, a screw rod is rotatably connected inside the slide groove, a slider is threadedly sleeved on the screw rod, a clamping plate is welded on the top of the slider, a positioning column is welded on the outer wall of the side of the clamping plate close to the substation body, and an end of the positioning column away from the clamping plate is gap-fitted inside the positioning hole located on the substation body;

[0012] The moisture-proof component includes a side cover plate that is clamped inside the second through groove on the outer walls on both sides of the base, a dehumidification box is fixedly connected to one side of the side cover plate located inside the base, an air inlet is provided below the outer wall of the dehumidification box on the side away from the side cover plate, an exhaust fan is fixedly connected inside the air inlet, a stuffing frame is clamped on the upper part of the interior of the dehumidification box, an upper cover plate is clamped on the top of the stuffing frame, and ventilation holes are provided on the inner bottom of the stuffing frame and the surface of the upper cover plate.

[0013] The utility model is further configured as follows: a waterproof cover is bonded to the lower part of the outer wall of the transformer substation body, the bottom of the waterproof cover is bonded to the top of the base, a first damper is fixedly connected to the four sides of the inner bottom of the base, the top of the first damper is respectively fixedly connected to the four sides of the lower surface of the movable plate, a second damper is arranged on both sides of the base, mounting plates are hinged at both ends of the second damper, and the mounting plates at the top of the second damper are respectively fixedly connected to the top of the outer walls on both sides of the base.

[0014] The utility model is further configured as follows: a transmission rod is rotatably connected to the bottom of the movable plate through a mounting frame, the top end of the transmission rod is located inside the third through groove, one end of the screw rod and the top end of the transmission rod are both sleeved with a first bevel gear, the first bevel gears are meshed and connected with each other, a driving rod is rotatably connected to the bottom of the transmission rod, both ends of the driving rod extend to the front and rear ends of the outer side of the base respectively, a second bevel gear is sleeved on the bottom end of the transmission rod and the outer wall of the driving rod, the second bevel gears are meshed and connected with each other.

[0015] The utility model is further configured as follows: the front and rear ends of the lower surface of the movable plate are fixedly connected to the bearing seats, both ends of the transmission rod are rotatably connected to the inside of the bearing seats, first through grooves are provided on the front and rear end surfaces of the base, the inside of the first through grooves is movably connected to movable blocks via return springs, both ends of the transmission rod are rotatably passed through the movable blocks and extend to the outside of the base, and both ends of the transmission rod are welded with clamping blocks.

[0016] The utility model is further configured as follows: the front and rear end surfaces of the base are both rotatably connected with a front cover frame, a rotating block is arranged inside the front cover frame located in front of the base, and a clamping groove which is clearance-matched with the clamping block is opened on the rear end surface of the rotating block.

[0017] The utility model is further configured as follows: grooves are provided on both sides of the inner bottom of the base, the internal gaps of the grooves are matched with protrusions, and the tops of the protrusions are respectively welded to the lower surface of the side cover plate and the bottom of the dehumidification box.

[0018] The utility model is further configured as follows: a handle is welded on an outer wall of one side of the side cover plate located outside the base.

[0019] The utility model is further configured as follows: fixing rods are welded around the outer wall of one side of the dehumidification box close to the side cover plate, and one end of the fixing rod away from the dehumidification box is welded around the outer wall of one side of the side cover plate.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model sets an installation component, drives the driving rod to rotate through the rotating block, drives the transmission rod to rotate synchronously through the second bevel gear, and drives the screw rod to rotate synchronously through the first bevel gear. Under the action of the threaded connection between the screw rod and the slider, the slider drives the clamping plate to move relative to the substation body, thereby realizing the installation of the substation body on the movable plate or removal from the movable plate, which facilitates the installation or removal between the anti-seismic structure and the substation body.

[0022] 2. The utility model sets a moisture-proof component and starts the exhaust fan. Under the action of the exhaust fan, the air in the base enters the interior of the dehumidification box through the air inlet, so that the air contacts the water-absorbing filler in the filler frame, and absorbs moisture in the air through the water-absorbing filler. The dry air returns to the interior of the base through the ventilation holes on the upper cover plate, thereby achieving dehumidification and moisture-proofing of the interior of the base and preventing moisture on the ground from penetrating into the inner side of the substation body through the base.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The figure is a schematic diagram of the overall structure of a seismic-resistant structure of a box-type substation.

[0026] Figure 2 It is an overall front sectional view of the utility model.

[0027] Figure 3 It is a structural schematic diagram of the base of the utility model.

[0028] Figure 4 It is a structural schematic diagram of the substation body of the utility model.

[0029] Figure 5 It is a structural schematic diagram of the installation assembly of the utility model.

[0030] Figure 6 It is a bottom view of the movable plate of the utility model.

[0031] Figure 7 It is a structural schematic diagram of the splint of the utility model.

[0032] Figure 8 It is a schematic diagram of the installation between the transmission rod and the driving rod of the utility model.

[0033] Fig. 9 It is a structural schematic diagram of the rotating block of the utility model.

[0034] Fig.10 It is a structural schematic diagram of the moisture-proof component of the utility model.

[0035] Fig.11 It is a structural schematic diagram of the side cover plate of the utility model.

[0036] Fig.12 It is a structural schematic diagram of the dehumidification box of the utility model.

[0037] Fig.13 It is a structural schematic diagram of the packing frame of the utility model.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 1-base, 101-waterproof cover, 102-first through slot, 103-front cover frame, 104-second through slot, 105-groove, 2-substation body, 201-positioning hole, 3-installation assembly, 301-movable plate, 301a-third through slot, 301b-slideway, 301c-mounting frame, 302-screw, 302a-first bevel gear, 303-clamping plate, 303a-sliding block, 303b-positioning column, 304-transmission rod, 304a-second bevel gear, 305-driving rod, 305a-bearing seat, 305b-movable block, 305c-reset spring, 305d-block, 306-rotating block, 306a-slot, 4-moisture-proof component, 401-side cover, 401a-handle, 401b-bump, 402-dehumidification box, 402a-air inlet, 402b-fixing rod, 403-exhaust fan, 404-filling frame, 404a-upper cover, 404b-ventilation hole, 5-first damper, 6-second damper. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] Example 1

[0042] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, it is the first embodiment of the utility model, which provides a seismic-resistant structure of a box-type substation, including a base 1 and a substation body 2. The substation body 2 is arranged on the top of the base 1 through an installation component 3. The installation component 3 includes a movable plate 301, a screw rod 302, a clamping plate 303, a transmission rod 304 and a driving rod 305. The screw rod 302 is driven to rotate by the transmission rod 304 and the driving rod 305, and the clamping plate 303 is driven by the screw rod 302 to clamp the substation body 2 on the movable plate 301, which solves the existing problem of inconvenience in installation and disassembly between the substation body 2 and the seismic-resistant structure.

[0043] Specifically, the movable plate 301 is movably connected to the upper inner side of the base 1, and the surface center position and the surrounding of the movable plate 301 are respectively provided with a third through groove 301a and a slide groove 301b, the inner part of the slide groove 301b is rotatably connected with a screw rod 302, a slider 303a is threadedly sleeved on the screw rod 302, a clamping plate 303 is welded on the top of the slider 303a, and a positioning column 303b is welded on the outer wall of the clamping plate 303 close to the substation body 2, and the end of the positioning column 303b away from the clamping plate 303 is gap-fitted at the position of the substation body 2. Inside the positioning hole 201 on the power station body 2, the lower part of the movable plate 301 is rotatably connected to a transmission rod 304 through a mounting frame 301c, the top of the transmission rod 304 is located inside the third through slot 301a, one end of the screw rod 302 and the top of the transmission rod 304 are sleeved with a first bevel gear 302a, the first bevel gears 302a are meshed and connected with each other, and the lower part of the transmission rod 304 is rotatably connected to a driving rod 305, and the two ends of the driving rod 305 extend to the front and rear ends of the outer side of the base 1 respectively, and the transmission rod 304 The bottom end and the outer wall of the driving rod 305 are sleeved with a second bevel gear 304a, and the second bevel gears 304a are meshed with each other. The movable plate 301 is used to install the substation body 2 on the base 1, the slide groove 301b is used to install the screw rod 302, and the third through groove 301a is used to install the first bevel gear 302a. The screw rod 302 and the slider 303a are used to drive the clamping plate 303 to move. The first bevel gear 302a is set to realize the screw rod 302a. The transmission effect between the rod 302 and the transmission rod 304, the setting of the clamping plate 303 is used to clamp the substation body 2 on the movable plate 301, the setting of the positioning column 303b and the positioning hole 201 realizes the positioning between the clamping plate 303 and the substation body 2, the setting of the transmission rod 304 is used to drive the screw rod 302 to rotate, the setting of the drive rod 305 is used to drive the transmission rod 304 to rotate, and the setting of the second bevel gear 304a realizes the transmission effect between the transmission rod 304 and the drive rod 305.

[0044] Further, a waterproof cover 101 is bonded to the lower part of the outer wall of the substation body 2, the bottom of the waterproof cover 101 is bonded to the top of the base 1, the first damper 5 is fixedly connected to the four sides of the inner bottom of the base 1, the top of the first damper 5 is respectively fixedly connected to the four sides of the lower surface of the movable plate 301, and the second damper 6 is provided on both sides of the base 1, and the two ends of the second damper 6 are hinged with mounting plates 601, and the mounting plates 601 at the top of the second damper 6 are respectively fixedly connected to the top of the outer walls on both sides of the base 1;

[0045] The front and rear ends of the lower surface of the movable plate 301 are fixedly connected with a bearing seat 305a, and both ends of the transmission rod 304 are rotatably connected to the inside of the bearing seat 305a. The front and rear end surfaces of the base 1 are provided with a first through groove 102, and the inside of the first through groove 102 is movably connected with a movable block 305b through a return spring 305c. Both ends of the transmission rod 304 rotate through the movable block 305b and extend to the outside of the base 1, and both ends of the transmission rod 304 are welded with a clamping block 305d;

[0046] The front cover frame 103 is rotatably connected to the front and rear end surfaces of the base 1. A rotating block 306 is arranged inside the front cover frame 103 located in front of the base 1. A slot 306a is provided on the rear end surface of the rotating block 306 to be clearance-matched with the clamping block 305d.

[0047] The operation process of this embodiment is: open the front cover frame 103, and sleeve the rotating block 306 on the driving rod 305 through the gap between the clamping block 305d and the clamping groove 306a, then drive the driving rod 305 to rotate through the rotating block 306, the driving rod 305 drives the transmission rod 304 to rotate synchronously through the second bevel gear 304a, and the transmission rod 304 drives the screw rod 302 to rotate synchronously through the first bevel gear 302a, and under the action of the threaded connection between the screw rod 302 and the slider 303a, the slider 303a drives the clamping plate 303 to move relative to the substation body 2, so that the substation body 2 can be installed on the movable plate 301 or removed from the movable plate 301.

[0048] Example 2

[0049] See also Figure 1 , Figure 2 , Fig.10 , Fig.11 , Fig.12 and Fig.13As shown, it is the second embodiment of the utility model, which is based on the previous embodiment, but is different from the previous embodiment in that: moisture-proof components 4 are also arranged on both sides of the interior of the base 1, and the moisture-proof components 4 include side cover plates 401, dehumidification box 402, exhaust fan 403 and filling frame 404. The air in the base 1 is sucked into the dehumidification box 402 by the exhaust fan 403, and the moisture in the air is absorbed by the water-absorbing filler in the filling frame 404, which solves the problem of poor moisture-proof ability of the existing earthquake-resistant structure.

[0050] Specifically, second through grooves 104 are provided on the outer walls on both sides of the base 1, and the side cover plate 401 is clamped inside the second through grooves 104. A dehumidification box 402 is fixedly connected to one side of the side cover plate 401 located inside the base 1, and an air inlet 402a is provided below the outer wall of the dehumidification box 402 away from the side cover plate 401, and an exhaust fan 403 is fixedly connected inside the air inlet 402a, and a stuffing box 404 is clamped on the upper part of the dehumidification box 402, and an upper cover plate 404a is clamped on the top of the stuffing box 404, and the inner bottom and The surface of the upper cover 404a is provided with ventilation holes 404b, and the side cover 401 is arranged to realize the installation of the dehumidification box 402 inside the base 1. The dehumidification box 402 is arranged to install the exhaust fan 403 and other structures, and the exhaust fan 403 is arranged to draw the humid air inside the base 1 into the dehumidification box 402. The filling frame 404 is arranged to fill the water-absorbing filler and absorb the moisture in the air with the help of the water-absorbing filler. The upper cover 404a is arranged to facilitate the replacement of the water-absorbing filler in the filling frame 404.

[0051] Furthermore, grooves 105 are provided on both sides of the inner bottom of the base 1, and the internal gap of the groove 105 is matched with a protrusion 401b, and the top of the protrusion 401b is welded to the lower surface of the side cover plate 401 and the bottom of the dehumidification box 402 respectively;

[0052] A handle 401a is welded on the outer wall of one side of the side cover plate 401 located outside the base 1;

[0053] Fixed rods 402 b are welded around the outer wall of one side of the dehumidification box 402 close to the side cover plate 401 , and one end of the fixed rod 402 b away from the dehumidification box 402 is welded around the outer wall of one side of the side cover plate 401 .

[0054] The rest of the structure is the same as that of Example 1.

[0055] The operation process of this embodiment is: start the exhaust fan 403, and under the action of the exhaust fan 403, the air in the base 1 enters the interior of the dehumidification box 402 through the air inlet 402a, so that the air contacts the water-absorbing filler in the filler frame 404, and absorbs moisture in the air through its water-absorbing filler, and the dry air returns to the interior of the base 1 through the ventilation hole 404b on the upper cover plate 404a, thereby achieving dehumidification and moisture-proofing of the interior of the base 1.

[0056] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0057] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A seismic resistant structure of a box-type substation, comprising a base (1) and a substation body (2), characterized in that: The substation body (2) is arranged on the top of the base (1) via a mounting assembly (3), and moisture-proof assemblies (4) are also arranged on both sides of the interior of the base (1); The mounting assembly (3) comprises a movable plate (301) movably connected to the upper inner side of the base (1), and a third through groove (301a) and a slide groove (301b) are respectively provided at the center position and around the surface of the movable plate (301), a screw rod (302) is rotatably connected inside the slide groove (301b), and a slider (303a) is threadedly sleeved on the screw rod (302), a clamping plate (303) is welded to the top of the slider (303a), and a positioning column (303b) is welded to the outer wall of the clamping plate (303) on one side close to the transformer substation body (2), and an end of the positioning column (303b) away from the clamping plate (303) is clearance-fitted inside the positioning hole (201) located on the transformer substation body (2); The moisture-proof component (4) comprises a side cover plate (401) clamped inside the second through groove (104) on the outer walls on both sides of the base (1), and a dehumidification box (402) is fixedly connected to one side of the side cover plate (401) located inside the base (1), an air inlet (402a) is provided below the outer wall of the dehumidification box (402) away from the side cover plate (401), and an exhaust fan (403) is fixedly connected inside the air inlet (402a), a packing frame (404) is clamped on the upper part of the interior of the dehumidification box (402), and an upper cover plate (404a) is clamped on the top of the packing frame (404), and ventilation holes (404b) are provided on the inner bottom of the packing frame (404) and the surface of the upper cover plate (404a).

2. The earthquake-resistant structure of a box-type substation according to claim 1 is characterized in that: A waterproof cover (101) is bonded to the lower part of the outer wall of the transformer substation body (2), and the bottom of the waterproof cover (101) is bonded to the top of the base (1). The inner bottom of the base (1) is fixedly connected to first dampers (5) on all sides, and the top of the first damper (5) is respectively fixedly connected to the lower surface of the movable plate (301) on all sides. Second dampers (6) are provided on both sides of the base (1), and mounting plates (601) are hinged at both ends of the second damper (6). The mounting plates (601) at the top of the second damper (6) are respectively fixedly connected to the top of the outer walls on both sides of the base (1).

3. The earthquake-resistant structure of a box-type substation according to claim 1, characterized in that: A transmission rod (304) is rotatably connected to the bottom of the movable plate (301) via a mounting frame (301c), and the top end of the transmission rod (304) is located inside the third through slot (301a). One end of the screw rod (302) and the top end of the transmission rod (304) are sleeved with a first bevel gear (302a), and the first bevel gears (302a) are meshingly connected to each other. A driving rod (305) is rotatably connected to the bottom of the transmission rod (304), and both ends of the driving rod (305) extend to the front and rear ends of the outside of the base (1), respectively. A second bevel gear (304a) is sleeved on the bottom end of the transmission rod (304) and the outer wall of the driving rod (305), and the second bevel gears (304a) are meshingly connected to each other.

4. The earthquake-resistant structure of a box-type substation according to claim 3 is characterized in that: The front and rear ends of the lower surface of the movable plate (301) are fixedly connected to a bearing seat (305a), and both ends of the transmission rod (304) are rotatably connected to the inside of the bearing seat (305a). The front and rear end surfaces of the base (1) are provided with a first through groove (102), and the inside of the first through groove (102) is movably connected to a movable block (305b) via a return spring (305c). Both ends of the transmission rod (304) are rotatably passed through the movable block (305b) and extend to the outside of the base (1), and both ends of the transmission rod (304) are welded with a clamping block (305d).

5. The earthquake-resistant structure of a box-type substation according to claim 4, characterized in that: The front and rear end surfaces of the base (1) are both rotatably connected to a front cover frame (103), and a rotating block (306) is arranged inside the front cover frame (103) located in front of the base (1), and a clamping groove (306a) that is clearance-matched with the clamping block (305d) is provided on the rear end surface of the rotating block (306).

6. The earthquake-resistant structure of a box-type substation according to claim 1, characterized in that: Grooves (105) are provided on both sides of the inner bottom of the base (1), and a protrusion (401b) is provided in the internal gap of the groove (105), and the top of the protrusion (401b) is respectively welded to the lower surface of the side cover plate (401) and the bottom of the dehumidification box (402).

7. The earthquake-resistant structure of a box-type substation according to claim 6, characterized in that: A handle (401a) is welded to an outer wall of one side of the side cover plate (401) located outside the base (1).

8. The earthquake-resistant structure of a box-type substation according to claim 6, characterized in that: The outer wall of one side of the dehumidification box (402) close to the side cover plate (401) is welded with fixing rods (402b) around the periphery, and the end of the fixing rod (402b) away from the dehumidification box (402) is welded to the outer wall of one side of the side cover plate (401) around the periphery.

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