A spliced ​​height-adjustable distribution box

Abstract

The utility model discloses a spliced ​​height-adjustable distribution box, comprising a box body and an adjustment structure; the box body comprises an upper box body and a lower box body spliced ​​to each other, the lower part of the inner wall of the upper box body is provided with an inverted L-shaped upper splicing interface, and the upper part of the outer wall of the lower box body is provided with an L-shaped lower splicing interface adapted to the side wall of the upper splicing interface; the adjustment structure comprises an adjustment rod and a fixed block, the upper part of the adjustment rod is rotatably connected to the lower part of the outer wall of the upper box body through a mounting component, an adjustment opening is vertically penetrated on the fixed block, the adjustment rod is inserted into the adjustment opening and can move up and down relative to the adjustment opening, and a fixing assembly is provided on the fixed block. The utility model facilitates the adjustment of the size of the space formed by the upper box body and the lower box body, thereby the size of the space inside the box body can be flexibly adjusted according to the specifications of the electrical components or when other components need to be added, and the overall practicality is high.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution boxes, in particular to a spliced ​​height-adjustable distribution box. Background Art

[0002] Distribution boxes are widely used in the electric power field. They assemble switchgear, measuring instruments, protective electrical appliances and auxiliary equipment in a closed or semi-closed metal cabinet or on a screen according to the electrical wiring requirements to form a low-voltage distribution box. During normal operation, the circuit can be connected or disconnected with the help of manual or automatic switches, and in the event of a fault or abnormal operation, the circuit can be cut off or an alarm can be given with the help of protective electrical appliances.

[0003] However, the existing low-voltage distribution boxes have the following problems during use: the box structure of the low-voltage distribution box is relatively fixed, and its internal space is generally fixed after production is completed, but in reality the heights of electrical components vary, which will result in either insufficient height of the internal space of the box or more space being unusable, and when the electrical components inside the box are densely packed, it will be impossible to add other components, and the only option is to replace a larger distribution box or increase the number of distribution boxes, and then reinstall and reconfigure all the components, resulting in cumbersome operation, poor flexibility, and low practicality. Utility Model Content

[0004] Therefore, the purpose of the utility model is to provide a spliced ​​height-adjustable distribution box to solve the problem that the box structure of the low-voltage distribution box is relatively fixed, and its internal space is generally fixed after production. However, in reality, the heights of electrical components vary, which will result in either insufficient height of the internal space of the box or unavailability of more space. Moreover, when the electrical components inside the box are densely packed, it will be impossible to add other components, and it is necessary to replace a larger distribution box or increase the number of distribution boxes, and then reinstall and reconfigure all the components, resulting in complicated operation, poor flexibility and low practicality.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A spliced ​​height-adjustable distribution box, comprising a box body and an adjustment structure; the box body comprises an upper box body and a lower box body spliced ​​to each other, the lower part of the inner side wall of the upper box body is provided with an inverted L-shaped upper splicing interface, the upper part of the outer side wall of the lower box body is provided with an L-shaped lower splicing interface adapted to the side wall of the upper splicing interface, suitable for adapting to the side wall of the upper splicing interface to splice the upper box body and the lower box body together; the adjustment structure comprises an adjustment rod and a fixed block, the upper part of the adjustment rod is rotatably connected to the lower part of the outer side wall of the upper box body through a mounting component, the fixed block is connected to the upper part of the outer side wall of the lower box body corresponding to the adjustment rod, an adjustment opening is vertically penetrated on the fixed block, the adjustment rod is inserted into the adjustment opening and can move up and down relative to the adjustment opening, and a fixing component is provided on the fixed block, suitable for fixing the adjustment rod in the adjustment opening.

[0007] In an optional embodiment, the mounting component includes two connecting blocks and two groups of rotating components, the two connecting blocks are symmetrically connected to the outer side walls of the upper box body at intervals, and the two groups of rotating components are symmetrically connected to the two side walls of the adjusting rod and are rotatably connected to the inner side walls of the two connecting blocks.

[0008] In an optional embodiment, a plug-in interface is horizontally opened on the outer side walls of the two connecting blocks toward the upper box body, and the plug-in interface includes a horizontal clamping portion and a hemispherical rotating portion, and the rotating component passes through the clamping portion into the rotating portion and is rotatably connected to the rotating portion.

[0009] In an optional embodiment, the rotating assembly includes a rotating rod and an adjusting nut, the rotating rod is horizontally connected to the outer wall of the adjusting rod, an external thread is provided on the outer surface of the rotating rod, and the adjusting nut is threadedly connected to the external thread of the rotating rod through an internal thread, and is suitable for rotating inwardly and clamping into the rotating part to limit the rotating rod on the rotating part.

[0010] In an optional implementation, a support rod is radially connected to the outer end surface of the adjusting nut, so the support rod extends a preset length in the radial direction of the adjusting nut.

[0011] In an optional embodiment, a plurality of fixing openings are provided on the side wall of the adjusting rod close to the fixing assembly, and are spaced apart from top to bottom. The fixing block is located on one side of the adjusting opening and is provided with a accommodating chamber connected to the adjusting opening. The fixing assembly is installed in the accommodating chamber and can be moved into the adjusting opening to be clamped on the adjusting opening to fix the adjusting rod.

[0012] In an optional embodiment, the fixing assembly includes a moving rod, a telescopic spring and a limiting rod. The moving rod is horizontally inserted into the accommodating chamber and can move back and forth relative to the accommodating chamber. The inner end of the moving rod is located in the adjusting port and is adapted to the fixing port, and the outer end is located on the outside of the accommodating chamber. The limiting rod is vertically connected to the moving rod and is slidably connected to the inner wall of the accommodating chamber. The telescopic spring is sleeved on the moving rod, one end of which abuts against the limiting rod, and the other end abuts against the inner wall of the accommodating chamber.

[0013] In an optional embodiment, the top wall and the bottom wall of the accommodating chamber are symmetrically provided with straight-line sliding grooves, and the end of the limiting rod is inserted into the sliding groove and slidably connected to the sliding groove.

[0014] In an optional implementation, the diameter of the inner end of the moving rod is smaller than the diameter of the fixed port, and a push-pull rod is connected to the outer end of the moving rod.

[0015] In an optional embodiment, the front ends of the upper box body and the lower box body are open structures, and the front ends of the upper box body and the lower box body are covered with box doors, one side of the box doors is hinged to the side walls of the upper box body and the lower box body respectively, and the box doors are composed of an upper sealing plate and a lower sealing plate, and a telescopic cavity is provided at the lower part of the upper sealing plate, and the upper part of the lower sealing plate is inserted into the telescopic cavity and can move up and down relative to the telescopic cavity, and a locking bolt that penetrates into the telescopic cavity is connected to the outer side wall of the upper sealing plate, and the inner end of the locking bolt abuts against the side wall of the lower sealing plate.

[0016] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0017] 1. The utility model can splice the upper box body and the lower box body together to form a box body through the upper splicing interface and the lower splicing interface, which is convenient to use. The box body adopts a splicing type, so the upper box body and the lower box body can be separated during transportation, which is convenient for transportation and mobile installation.

[0018] 2. The utility model uses the functions of the adjusting rod, the adjusting port and the fixing assembly. The adjusting rod moves up and down in the adjusting port to drive the upper box body to move up and down relative to the lower box body, thereby adjusting the size of the space formed by the upper box body and the lower box body. The adjusting rod moved to a suitable position can be fixed by the fixing assembly, which is convenient for adjusting the size of the space formed by the upper box body and the lower box body. Therefore, the size of the space inside the box body can be flexibly adjusted according to the specifications of the electrical components or when other components need to be added, and the overall practicality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a schematic diagram of the structure of the utility model after the spliced ​​height-adjustable distribution box is assembled;

[0020] Figure 2 It is a schematic diagram of the structure after the upper box body and the lower box body of the utility model are adjusted;

[0021] Figure 3 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0022] Figure 4 for Figure 3 Schematic diagram of the structure when the middle adjusting nut is rotated outward;

[0023] Figure 5 for Figure 3 Schematic diagram of the structure when the middle adjustment rod is separated from the connecting block;

[0024] Figure 6 It is a cross-sectional structural diagram of the utility model when the movable rod fixes the adjusting rod;

[0025] Figure 7 It is a schematic cross-sectional view of the structure of the utility model when the moving rod is separated from the adjusting rod;

[0026] Figure 8 It is a structural schematic diagram of the utility model when the upper sealing plate and the lower sealing plate are separated;

[0027] Wherein, the accompanying drawings are marked as follows:

[0028] 1. Upper box body; 11. Upper assembly interface; 2. Lower box body; 21. Lower assembly interface; 3. Adjustment rod; 31. Rotation rod; 32. Adjustment nut; 33. Support rod; 34. Fixing port; 4. Fixing block; 41. Adjustment port; 42. Accommodating chamber; 43. Telescopic spring; 44. Moving rod; 45. Push-pull rod; 46. Slide groove; 47. Limit rod; 5. Connecting block; 51. Plug interface; 6. Upper sealing plate; 61. Telescopic cavity; 62. Locking bolt; 7. Lower sealing plate. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0030] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0031] For easier understanding, see Figure 1 and Figure 2 The present embodiment discloses a spliced ​​height-adjustable distribution box, comprising a box body and an adjustment structure; the box body comprises an upper box body 1 and a lower box body 2 spliced ​​together, the lower part of the inner side wall of the upper box body 1 is provided with an inverted L-shaped upper splicing interface 11, and the upper part of the outer side wall of the lower box body 2 is provided with an L-shaped lower splicing interface 21 adapted to the side wall of the upper splicing interface 11, which is suitable for adapting to the side wall of the upper splicing interface 11 to splice the upper box body 1 and the lower box body 2 together; the adjustment structure includes The utility model comprises an adjusting rod 3 and a fixing block 4, the upper portion of the adjusting rod 3 is rotatably connected to the lower portion of the outer side wall of the upper box body 1 through a mounting component, the fixing block 4 is connected to the upper portion of the outer side wall of the lower box body 2 corresponding to the adjusting rod 3, an adjusting opening 41 is vertically penetrated on the fixing block 4, the adjusting rod 3 is inserted into the adjusting opening 41 and can move up and down relative to the adjusting opening 41, and a fixing component is provided on the fixing block 4, which is suitable for fixing the adjusting rod 3 in the adjusting opening 41.

[0032] In the above embodiment, the upper box body 1 and the lower box body 2 can be spliced ​​together to form a box body through the action of the upper splicing interface 11 and the lower splicing interface 21, which is convenient to use, and the box body adopts a splicing type, so that the upper box body 1 and the lower box body 2 can be disassembled during transportation, which is convenient for transportation and mobile installation; through the action of the adjusting rod 3, the adjusting port 41 and the fixing component, the upper box body 1 can be driven to move up and down relative to the lower box body 2 by the up and down movement of the adjusting rod 3 in the adjusting port 41, thereby the size of the space formed by the upper box body 1 and the lower box body 2 can be adjusted, and the adjusting rod 3 moved to a suitable position can be fixed through the action of the fixing component, which is convenient for adjusting the size of the space formed by the upper box body 1 and the lower box body 2, thereby the size of the space inside the box body can be flexibly adjusted according to the specifications of the electrical components or when other components need to be added, and the overall practicality is high.

[0033] In the above embodiment, the height of the upper joint 11 and the lower joint 21 can be set according to the space height requirement that needs to be adjusted, the thickness of the side of the upper box body 1 is consistent with the thickness of the side of the lower box body 2, and the width of the upper joint 11 and the lower joint 21 are the same, that is, a notch is opened in the inner wall of the lower part of the upper box body 1 and the upper part of the lower box body 2, and the notch of the upper box body 1 and the notch of the lower box body 2 are just staggered, so that the notch of the upper box body 1 / lower box body 2 can be matched with the remaining side of the lower box body 2 / upper box body 1 after the notch is opened, and the upper box body 1 can be assembled Connected to the lower box body 2, when splicing, first align the adjusting rod 3 with the adjusting port 41 and then insert the adjusting rod 3 into the adjusting port 41, and then cover the upper box body 1 from top to bottom on the lower box body 2, after adjusting the upper box body 1 to a suitable position, the adjusting rod 3 can be fixed by the fixing assembly. When the space capacity inside the box body needs to be increased during the installation of electronic devices, loosen the fixing assembly on both sides of the lower box body 2 to fix the adjusting rod 3, and then move the upper box body 1 upward to a suitable position as a whole and fix the adjusting rod 3.

[0034] In an alternative embodiment, see Figure 3 , Figure 4 as well as Figure 5 The installation component includes two connecting blocks 5 and two groups of rotating components. The two connecting blocks 5 are symmetrically connected to the outer wall of the upper box body 1 at intervals, and the two groups of rotating components are symmetrically connected to the two side walls of the adjusting rod 3 and are rotatably connected to the inner walls of the two connecting blocks 5.

[0035] Preferably, an insertion port 51 is horizontally opened on the outer side walls of the two connecting blocks 5 in the direction toward the upper box body 1, and the insertion port 51 includes a horizontal clamping portion and a hemispherical rotating portion, and the rotating component passes through the clamping portion into the rotating portion and is rotatably connected to the rotating portion, that is, the rotating component is clamped into the rotating portion from the outside to the inside through the clamping portion.

[0036] Furthermore, the rotating assembly includes a rotating rod 31 and an adjusting nut 32. The rotating rod 31 is horizontally connected to the outer wall of the adjusting rod 3. An external thread is provided on the outer surface of the rotating rod 32. The adjusting nut 32 is threadedly connected to the external thread of the rotating rod 31 through an internal thread, and is suitable for rotating inwardly and clamping into the rotating part to limit the rotating rod 31 on the rotating part.

[0037] Furthermore, a support rod 33 is radially connected to the outer end surface of the adjusting nut 32, so the support rod 33 extends a preset length along the radial direction of the adjusting nut 32, so that the adjusting nut 32 can be rotated when the hand is placed on the support rod 33 and the support rod 33 is pushed, so that the adjusting nut 32 can be rotated into the rotating part of the plug-in interface 51 or the adjusting nut 32 can be rotated outside the rotating part of the plug-in interface 51. When the adjusting nut 32 needs to be rotated into the rotating part, the support rod 33 is pushed, and the adjusting nut 32 can be rotated inwardly. When a part of the adjusting nut 32 is rotated into the rotating part, the rotation can be stopped, that is, half of the adjusting nut 32 is located in the rotating part and the other half is located outside the rotating part, so as to prevent the adjusting nut 32 from rotating too deep into the rotating part and being difficult to rotate outward.

[0038] When the adjusting rod 3 is in the process of rotating, the adjusting nut 32 rotates together with the adjusting nut 32 on the rotating part, so that the rotating rod 31 is not easily disengaged from the clamping part. When the adjusting rod 3 needs to be disengaged from the connecting block 5, the adjusting nut 32 is rotated outward to disengage from the rotating part of the plug-in interface 51, and then the adjusting rod 3 is lifted up and the clamping part of the plug-in interface 51 is aligned with the rotating rod 31 before the rotating rod 31 is disengaged outward. This makes it easy to disassemble and install the adjusting rod 3, and the adjusting rod 3 can be rotated upward and stored when not in use after installation to avoid the length of the adjusting rod 3 extending to the lower part of the upper box body 1, which causes certain inconveniences during transportation.

[0039] In an alternative embodiment, see Figure 6 and Figure 7 A plurality of fixing openings 34 are provided on the side wall of the adjusting rod 3 close to the fixing assembly from top to bottom. The fixing block 4 is provided with a accommodating chamber 42 connected with the adjusting opening 41 on one side of the adjusting opening 41. The fixing assembly is installed in the accommodating chamber 42 and can be moved into the adjusting opening 41 to be stuck on the adjusting opening 41 to fix the adjusting rod 3. That is, the fixing assembly in the accommodating chamber 42 can move back and forth, and can pass through the connection between the accommodating chamber 42 and the adjusting opening 41 and be stuck on the fixing opening 34 to fix the adjusting rod 3. When the adjusting rod 3 needs to be adjusted up and down, the adjusting rod 3 can be adjusted after the fixing assembly is detached from the fixing opening 34 on the adjusting rod 3.

[0040] Preferably, the fixing assembly includes a moving rod 44, a telescopic spring 43 and a limiting rod 47. The moving rod 44 is horizontally inserted into the accommodating chamber 42 and can move back and forth relative to the accommodating chamber 42. The inner end of the moving rod 44 is located in the adjusting port 41 and is adapted to the fixing port 34, and the outer end is located on the outside of the accommodating chamber 42. The limiting rod 47 is vertically connected to the moving rod 44 and is slidably connected to the inner wall of the accommodating chamber 42. The telescopic spring 43 is sleeved on the moving rod 44, with one end abutting against the limiting rod 47 and the other end abutting against the inner wall of the accommodating chamber 42.

[0041] Furthermore, the top wall and the bottom wall of the accommodating chamber 42 are symmetrically recessed with a straight groove 46, and the end of the limiting rod 47 is inserted into the groove 46 and slidably connected to the groove 46. When the moving rod 44 moves in the accommodating chamber 42, it will drive the limiting rod 47 to slide back and forth in the groove 46. The groove 46 plays a certain limiting role to prevent the moving rod 44 from rotating during the movement.

[0042] Furthermore, the diameter of the inner end of the movable rod 44 is smaller than the diameter of the fixed opening 34, so that the movable rod 44 can be easily stuck on the fixed opening 34. A push-pull rod 45 is connected to the outer end of the movable rod 44, and the push-pull rod 45 can be used to pull the movable rod 44 back and forth, saving effort.

[0043] In the above embodiment, when the adjusting rod 3 needs to be adjusted, the moving rod 44 is first pulled outward to make the moving rod 44 disengage from the fixing opening 34 of the adjusting rod 3, and then the adjusting rod 3 is moved up or down. After moving to the appropriate position, the external force on the moving rod 44 is released, and the limit rod 47 is pushed forward under the reset action of the telescopic spring 43, thereby pushing the moving rod 44 forward and clamping it into the fixing opening 34 of the adjusting rod 3 to fix the adjusting rod 3. That is, when the adjusting rod 3 is adjusted and fixed, the moving rod 44 can be moved back and forth to disengage from the adjusting rod 3 or clamped on the adjusting rod 3.

[0044] In an alternative embodiment, see Figure 8 The front ends of the upper box body and the lower box body are open structures, and the front ends of the upper box body and the lower box body are covered with box doors, one side of the box door is hinged to the side walls of the upper box body and the lower box body respectively, and the box door is composed of an upper sealing plate 6 and a lower sealing plate 7, and a telescopic cavity 61 is provided at the lower part of the upper sealing plate 6, and the upper part of the lower sealing plate 7 is inserted into the telescopic cavity 61 and can move up and down relative to the telescopic cavity 61, and a locking bolt 62 that penetrates into the telescopic cavity 61 is connected to the outer side wall of the upper sealing plate 6, and the inner end of the locking bolt 62 abuts against the side wall of the lower sealing plate 7.

[0045] In the above embodiment, the height of the entire box door can be adjusted by moving the lower sealing plate 7 up and down in the telescopic cavity 61 of the upper sealing plate 6, thereby adjusting the height of the entire box door according to the size of the opening formed after the upper box body 1 and the lower box body 2 are adjusted. After adjustment, the lower sealing plate 7 is firmly fastened in the telescopic cavity 61 by the locking bolt 62, and then the entire box door is assembled on the upper box body 1 and the lower box body 2, and then rotated to cover the opening formed by the upper box body 1 and the lower box body 2. When it is necessary to adjust the internal capacity enclosed by the upper box body 1 and the lower box body 2, the upper sealing plate 6 is adjusted together with the upper box body 1. After adjustment, the adjusting rod 3 and the lower sealing plate 7 are fixed by the moving rod 44 and the locking bolt 62 respectively.

[0046] Although the present invention has been described using the above preferred embodiments, it is not intended to limit the scope of protection of the present invention. Any person skilled in the art may make various changes and modifications to the above embodiments without departing from the spirit and scope of the present invention, and the changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A spliced ​​height-adjustable distribution box, characterized in that: include: A box body, the box body comprising an upper box body and a lower box body spliced ​​to each other, the lower part of the inner side wall of the upper box body is provided with an inverted L-shaped upper splicing interface, the upper part of the outer side wall of the lower box body is provided with an L-shaped lower splicing interface adapted to the side wall of the upper splicing interface, and suitable for adapting to the side wall of the upper splicing interface to splice the upper box body and the lower box body together; The adjustment structure includes an adjustment rod and a fixed block. The upper part of the adjustment rod is rotatably connected to the lower part of the outer side wall of the upper box body through a mounting component. The fixed block is connected to the upper part of the outer side wall of the lower box body corresponding to the adjustment rod. An adjustment opening is vertically penetrated on the fixed block. The adjustment rod is inserted into the adjustment opening and can move up and down relative to the adjustment opening. A fixing component is provided on the fixed block, which is suitable for fixing the adjustment rod in the adjustment opening.

2. The spliced ​​height-adjustable distribution box according to claim 1 is characterized in that: The mounting component includes two connecting blocks and two groups of rotating components. The two connecting blocks are symmetrically connected to the outer side walls of the upper box body at intervals, and the two groups of rotating components are symmetrically connected to the two side walls of the adjusting rod and are rotatably connected to the inner side walls of the two connecting blocks.

3. The spliced ​​height-adjustable distribution box according to claim 2 is characterized in that: An insertion interface is horizontally opened on the outer side walls of the two connecting blocks toward the upper box body. The insertion interface includes a horizontal clamping portion and a hemispherical rotating portion. The rotating component passes through the clamping portion into the rotating portion and is rotatably connected to the rotating portion.

4. The spliced ​​height-adjustable distribution box according to claim 3 is characterized in that: The rotating assembly includes a rotating rod and an adjusting nut. The rotating rod is horizontally connected to the outer side wall of the adjusting rod. An external thread is arranged on the outer side surface of the rotating rod. The adjusting nut is threadedly connected to the external thread of the rotating rod through an internal thread, and is suitable for rotating inwardly and clamping into the rotating part to limit the rotating rod on the rotating part.

5. The spliced ​​height-adjustable distribution box according to claim 4 is characterized in that: A support rod is radially connected to the outer end surface of the adjusting nut, so the support rod extends along the radial direction of the adjusting nut by a preset length.

6. The spliced ​​height-adjustable distribution box according to claim 1, characterized in that: The side wall of the adjusting rod close to the fixing assembly is provided with a plurality of fixing openings spaced apart from top to bottom. The fixing block is located on one side of the adjusting opening and is provided with a accommodating chamber connected to the adjusting opening. The fixing assembly is installed in the accommodating chamber and can be moved into the adjusting opening to be clamped on the adjusting opening to fix the adjusting rod.

7. The spliced ​​height-adjustable distribution box according to claim 6, characterized in that: The fixing assembly includes a moving rod, a telescopic spring and a limiting rod. The moving rod is horizontally inserted into the accommodating chamber and can move back and forth relative to the accommodating chamber. The inner end of the moving rod is located in the adjusting port and is adapted to the fixing port, and the outer end is located outside the accommodating chamber. The limiting rod is vertically connected to the moving rod and is slidably connected to the inner wall of the accommodating chamber. The telescopic spring is sleeved on the moving rod, with one end abutting against the limiting rod and the other end abutting against the inner wall of the accommodating chamber.

8. The spliced ​​height-adjustable distribution box according to claim 7, characterized in that: The top wall and the bottom wall of the accommodating chamber are symmetrically recessed with straight-line sliding grooves, and the end of the limiting rod is inserted into the sliding groove and is slidably connected to the sliding groove.

9. The spliced ​​height-adjustable distribution box according to claim 7, characterized in that: The diameter of the inner end of the moving rod is smaller than the diameter of the fixed opening, and the outer end of the moving rod is connected with a push-pull rod.

10. The spliced ​​height-adjustable distribution box according to claim 1, characterized in that: The front ends of the upper box body and the lower box body are open structures, and the front ends of the upper box body and the lower box body are covered with box doors, one side of the box door is hinged to the side walls of the upper box body and the lower box body respectively, and the box door is composed of an upper sealing plate and a lower sealing plate, and a telescopic cavity is provided at the lower part of the upper sealing plate, and the upper part of the lower sealing plate is inserted into the telescopic cavity and can move up and down relative to the telescopic cavity, and a locking bolt that penetrates into the telescopic cavity is connected to the outer side wall of the upper sealing plate, and the inner end of the locking bolt abuts against the side wall of the lower sealing plate.

Images