Combined power distribution cabinet

Abstract

The utility model discloses a combined power distribution cabinet, which particularly relates to the field of power distribution cabinets and comprises a power distribution cabinet door structure and a horizontal power distribution cabinet structure which are mutually mounted in a combined manner. A plurality of wire harness positioning mechanisms for positioning component wire harnesses are mounted in the horizontal power distribution cabinet structure; the horizontal power distribution cabinet structure comprises a first power distribution cabinet frame part, second power distribution cabinet frame parts are fixedly installed on the two sides of the first power distribution cabinet frame part respectively, and a third power distribution cabinet frame part is fixedly installed on the side, away from the first power distribution cabinet frame part, of each second power distribution cabinet frame part. The combined power distribution cabinet adopts a flat design, the position of the combined power distribution cabinet is allowed to be flexibly adjusted in a narrow installation space, the plurality of power distribution cabinet frame pieces I are arranged in a positive and negative crossing or vertical stacking manner, so that equipment can be efficiently utilized in a limited space, the space utilization rate is greatly improved by the design, and the space utilization rate is reduced. The device is especially suitable for power distribution occasions with dense equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinets, and more specifically, to a combined power distribution cabinet. Background Art

[0002] At present, most of the power distribution cabinets on the market adopt vertical design, which occupies a large installation space. Especially in the environment with dense equipment or narrow space, traditional vertical power distribution cabinets often cannot effectively utilize the limited space, resulting in unreasonable equipment layout, installation and maintenance difficulties. In addition, the structural design of traditional vertical power distribution cabinets is relatively fixed and cannot be flexibly adjusted according to actual needs, which limits the diversity of its application scenarios;

[0003] The utility model provides a combined power distribution cabinet. By adopting a flat design and a combinable structure, the power distribution cabinet can be flexibly adjusted and installed in a small space, which greatly improves the space utilization rate. Compared with the traditional vertical power distribution cabinet, the power distribution cabinet of the utility model can not only be arranged in a positive and negative cross or up and down stacking manner, but also can be efficiently arranged in a small corner, which solves the problem of insufficient space utilization in the prior art and improves the overall layout of the equipment and the convenience of installation. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a combined power distribution cabinet, which solves the problems raised in the above-mentioned background technology through a power distribution cabinet with a combined design and a flat structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a combined power distribution cabinet, comprising a power distribution cabinet door structure and a flat power distribution cabinet structure, wherein the power distribution cabinet door structure and the flat power distribution cabinet structure are installed mutually in a combined manner, and a plurality of harness positioning mechanisms for positioning component harnesses are installed inside the flat power distribution cabinet structure;

[0006] The flat-type distribution cabinet structure comprises a distribution cabinet frame member 1, and distribution cabinet frame members 2 are fixedly installed on both sides of the distribution cabinet frame member 1, and a distribution cabinet frame member 3 is fixedly installed on a side of the distribution cabinet frame member 2 away from the distribution cabinet frame member 1, and the distribution cabinet frame member 2 and the distribution cabinet frame member 3 form a raised support portion 1, and a curling positioning member is fixedly installed on one side of the distribution cabinet frame member 3, and the curling direction of the curling positioning member is toward the distribution cabinet frame member 1;

[0007] The number of the distribution cabinet frame parts one is set to be multiple, and the multiple distribution cabinet frame parts one are arranged in a cross-distribution arrangement in front and back order or stacked up and down. Two adjacent distribution cabinet frame parts one are wound around each other through two curling positioning parts to form a cross-distribution arrangement in front and back order.

[0008] In a preferred embodiment, the distribution cabinet door structure includes a distribution cabinet door panel, a positioning protrusion one is fixedly installed on one side of the distribution cabinet door panel, a positioning protrusion two is fixedly installed on the side of the positioning protrusion one away from the distribution cabinet door panel, the positioning protrusion one and the positioning protrusion two form a raised support portion two, and the distribution positions of the support portion one and the support portion two are arranged in a one-to-one correspondence.

[0009] In a preferred embodiment, a group of corner positioning members are respectively installed on both sides of the distribution cabinet door panel, and the number of corner positioning members in each group is set to two. The two groups of corner positioning members correspond to the four corners of the flat distribution cabinet structure, and the corner positioning members are installed with rubber gaskets facing the sides of the distribution cabinet door panel.

[0010] In a preferred embodiment, the wiring harness positioning mechanism includes a flat pallet plate 1, the number of which is set to be multiple, and the components are installed between the multiple wiring harness positioning mechanisms, and a transverse positioning rod 1 and a transverse positioning rod 2 are installed on the side of each of the flat pallet plates 1, wherein the wiring harness of the components is positioned by clamping the transverse positioning rod 1 and the transverse positioning rod 2.

[0011] In a preferred embodiment, the surfaces of the transverse positioning rod 1 and the transverse positioning rod 2 are rotatably connected with multiple groups of rotating cylinders, the number of the rotating cylinders in each group is set to two, a positioning disc is fixedly installed on the side of the rotating cylinder, a middle rotating cylinder is installed between the two positioning discs by bolts, and the middle rotating cylinder is rotatably connected to the outside of the transverse positioning rod 1 or the transverse positioning rod 2 through the rotating cylinder;

[0012] A plurality of bolt-type positioning members for squeezing the wiring harness are fixedly mounted on the outer wall of the central rotating cylinder, and a prefabricated transverse groove is provided in the middle of the bolt-type positioning member in a through-shaped manner.

[0013] In a preferred embodiment, an annular stopper 1 is fixedly installed at both ends of the transverse positioning rod 1 and the transverse positioning rod 2, a semicircular positioning member is sleeved on the outer wall of the annular stopper 1, and the cross section of the semicircular positioning member is C-shaped, and a connecting support member is fixedly installed between the two semicircular positioning members;

[0014] An annular limiting member 2 is installed at one end of the annular limiting member 1. The annular limiting member 2 is hollow. The inner cavity of the annular limiting member 2 is plug-in and rotatably connected to a rod-shaped supporting member. A coil spring for assisting resetting is installed between the rod-shaped supporting member and the annular limiting member 2.

[0015] In a preferred embodiment, an extension arm is installed at one end of the rod-shaped supporting member through a bolt, a flat support plate 2 is installed at one end of the extension arm, a flat support plate 3 is installed on one side of the flat support plate 2, and the flat support plate 3 is fixedly connected to the flat support plate 1;

[0016] A through groove 1 and a through groove 2 are provided inside the flat support plate 1, the through groove 1 and the through groove 2 are connected, a wire harness positioning circular groove is provided in the middle of the through groove 2, and the position of the wire harness positioning circular groove is consistent with the position of the central rotating cylinder;

[0017] An S-shaped external component 1 is installed on the side of the flat support plate 1 through a through groove 1, an S-shaped external component 2 is installed on the side of the S-shaped external component 1, a positioning panel frame is fixedly installed on the surface of the distribution cabinet frame 1 by bolts, prefabricated clips are fixedly installed on the top and bottom of the positioning panel frame, the prefabricated clips are clamped in the inside of the S-shaped external component 2, and an installation slot is opened on the surface of the positioning panel frame.

[0018] Technical effects and advantages of the utility model:

[0019] 1. Improve space utilization: The combined power distribution cabinet of the utility model adopts a flat design, which allows it to flexibly adjust its position in a narrow installation space. Multiple power distribution cabinet frame parts are arranged in a positive and negative cross or stacked up and down manner, so that the equipment can be efficiently used in a limited space. This design greatly improves the space utilization rate and is particularly suitable for power distribution occasions with dense equipment;

[0020] 2. Enhance equipment stability: The distribution cabinet frame parts 2 and 3 of the distribution cabinet form a stable support part to ensure that the cabinet is not easily displaced during installation. At the same time, the one-to-one correspondence design of the support part 1 and the support part 2 provides a double fixing effect, further improving the stability and safety of the equipment and adapting to application requirements in different environments;

[0021] 3. Optimize harness management: The harness positioning mechanism includes a flat support plate, a horizontal positioning rod and a rotating cylinder. The central rotating cylinder is fixed and the bolt-type positioning piece is used to ensure that the harness is not easy to loosen or fall off during installation and operation. The friction between the rotating cylinder and the flat support plate is adjustable, which can not only stabilize the harness, but also facilitate harness adjustment and maintenance, greatly optimizing the harness management efficiency;

[0022] 4. Easy to install and maintain: The various components of the distribution cabinet adopt a modular design. The joint support parts and the annular limit parts are used together, making the equipment easy to operate during installation, and easy to disassemble and maintain. The coil spring reset mechanism enables the horizontal positioning rod to automatically reset after installation and use, which improves the overall convenience of operation and the efficiency of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 It is a side structural schematic diagram of the utility model.

[0025] Figure 3 It is a schematic structural diagram of a transverse positioning rod 1 and a transverse positioning rod 2 of the utility model.

[0026] Figure 4 For this utility model Figure 3 A-section structure enlarged view.

[0027] Figure 5 It is a structural schematic diagram of the positioning panel frame of the utility model.

[0028] Figure 6 It is a structural cross-sectional view of a flat support plate and a positioning panel frame of the utility model.

[0029] Figure 7 For this utility model Figure 6 Enlarged view of the structure of part B.

[0030] The accompanying drawings are marked as follows: 1 distribution cabinet door structure, 101 distribution cabinet door panel, 102 positioning type protrusion 1, 103 positioning type protrusion 2, 104 corner positioning member, 105 rubber gasket, 2 flat distribution cabinet structure, 21 distribution cabinet frame member 1, 22 distribution cabinet frame member 2, 23 distribution cabinet frame member 3, 24 curling positioning member, 3 harness positioning mechanism, 31 flat support plate 1, 32 horizontal positioning rod 1, 33 horizontal positioning rod 2, 34 rotating cylinder, 35 positioning disk, 36 center Rotating cylinder, 37 connecting support, 38 bolt-type positioning member, 39 prefabricated transverse groove, 310 annular limiter 1, 311 semicircular positioning member, 312 annular limiter 2, 313 rod-shaped supporting member, 314 extension arm, 315 flat support plate 2, 316 flat support plate 3, 317 through groove 1, 318 through groove 2, 319 harness positioning circular groove, 320 S-type external plug-in 1, 321 S-type external plug-in 2, 322 positioning panel frame, 323 prefabricated buckles, 324 installation notches. DETAILED DESCRIPTION

[0031] 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 in 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.

[0032] Refer to the instruction manual Figure 1-7A combined power distribution cabinet according to an embodiment of the utility model comprises a power distribution cabinet door structure 1 and a flat power distribution cabinet structure 2. The power distribution cabinet door structure 1 and the flat power distribution cabinet structure 2 are installed with each other in a combined manner. A plurality of harness positioning mechanisms 3 for positioning component harnesses are installed inside the flat power distribution cabinet structure 2. The flat power distribution cabinet structure 2 comprises a power distribution cabinet frame member 21. Power distribution cabinet frame members 22 are fixedly installed on both sides of the power distribution cabinet frame member 21. The power distribution cabinet frame member 22 is fixed away from the side of the power distribution cabinet frame member 21. A distribution cabinet frame part 3 23 is installed, and the distribution cabinet frame part 22 and the distribution cabinet frame part 3 23 form a raised supporting portion 1. A curling positioning part 24 is fixedly installed on one side of the distribution cabinet frame part 3 23, and the curling direction of the curling positioning part 24 is toward the distribution cabinet frame part 1 21; the number of the distribution cabinet frame parts 1 21 is set to multiple, and the multiple distribution cabinet frame parts 21 are arranged in a cross-distributed arrangement in reverse order or stacked up and down, and two adjacent distribution cabinet frame parts 21 are wound around each other through two curling positioning parts 24 to form a cross-distributed arrangement in reverse order.

[0033] Among them, the distribution cabinet door structure 1 includes a distribution cabinet door panel 101, a positioning protrusion 102 is fixedly installed on one side of the distribution cabinet door panel 101, and a positioning protrusion 103 is fixedly installed on the side of the positioning protrusion 102 away from the distribution cabinet door panel 101. The positioning protrusion 102 and the positioning protrusion 103 form a raised support part 2, and the distribution positions of the support part 1 and the support part 2 are arranged in a one-to-one correspondence; a group of corner positioning pieces 104 are respectively installed on both sides of the distribution cabinet door panel 101, and the number of each group of corner positioning pieces 104 is set to two, and the two groups of corner positioning pieces 104 correspond to the four corners of the flat distribution cabinet structure 2, and the corner positioning pieces 104 are installed with rubber gaskets 105 facing the sides of the distribution cabinet door panel 101.

[0034] The wiring harness positioning mechanism 3 includes a flat support plate 31, the number of which is set to be multiple, and the components are installed between the multiple wiring harness positioning mechanisms 3. A transverse positioning rod 32 and a transverse positioning rod 33 are installed on the side of each flat support plate 31, wherein the wiring harness of the components is positioned by clamping the transverse positioning rod 32 and the transverse positioning rod 33; the surfaces of the transverse positioning rod 32 and the transverse positioning rod 33 are rotatably connected to multiple groups of rotating cylinders 34, and the number of each group of rotating cylinders 34 is set to two. A positioning disc 35 is fixedly installed on the side of the rotating cylinder 34, and a central rotating cylinder 36 is installed between the two positioning discs 35 by bolts. The central rotating cylinder 36 is rotatably connected to the outside of the transverse positioning rod 32 or the transverse positioning rod 33 through the rotating cylinder 34; the central rotating cylinder The outer wall of 36 is fixedly installed with a plurality of bolt-type positioning members 38 for extruding the wiring harness, and the middle part of the bolt-type positioning member 38 is provided with a prefabricated transverse groove 39 in a through-shape; an annular limiting member 1 310 is fixedly installed at both ends of the transverse positioning rod 1 32 and the transverse positioning rod 2 33, and a semicircular positioning member 311 is sleeved on the outer wall of the annular limiting member 1 310, and the cross-section of the semicircular positioning member 311 is C-shaped, and a connecting support member 37 is fixedly installed between the two semicircular positioning members 311, and an annular limiting member 2 312 is installed at one end of the annular limiting member 1 310, and the annular limiting member 2 312 is hollow, and the inner cavity of the annular limiting member 2 312 is plug-in and rotatably connected to a rod-shaped supporting member 313, and a coil spring for auxiliary resetting is installed between the rod-shaped supporting member 313 and the annular limiting member 2 312.

[0035] An extension arm 314 is installed at one end of the rod-shaped supporting member 313 by bolts, and a flat support plate 2 315 is installed at one end of the extension arm 314. A flat support plate 316 is installed on one side of the flat support plate 2 315, and the flat support plate 316 is fixedly connected to the flat support plate 1 31; a through groove 1 317 and a through groove 2 318 are opened inside the flat support plate 1 31, and the through groove 1 317 and the through groove 2 318 are connected. A wire harness positioning circular groove 319 is opened in the middle of the through groove 2 318, and the position of the wire harness positioning circular groove 319 is consistent with the center position. The position of the rotating cylinder 36 remains consistent; an S-shaped external component 320 is installed on the side of the flat support plate 31 through a through groove 317, and an S-shaped external component 321 is installed on the side of the S-shaped external component 320; a positioning panel frame 322 is fixedly installed on the surface of the distribution cabinet frame 21 by bolts; prefabricated clips 323 are fixedly installed on the top and bottom of the positioning panel frame 322; the prefabricated clips 323 are clamped in the inside of the S-shaped external component 321; and a mounting slot 324 is provided on the surface of the positioning panel frame 322.

[0036] It should be noted that in actual use, the switch cabinet door panel 101 is engaged with the two sides of the switch cabinet frame member 21 to form two installation modes, such as Figure 2As shown, when the switch cabinet door panel 101 is installed on the left side of the switch cabinet frame member 21, it belongs to the component open mode, and when the switch cabinet door panel 101 is installed on the right side of the switch cabinet frame member 21, it belongs to the component closed mode. The switch cabinet door structure 1 protects the horizontal switch cabinet structure 2. This solution designs the switch cabinet door structure 1 and the horizontal switch cabinet structure 2 to be flat, which can make it more convenient for this solution to be installed in a small corner of the cabinet with components. Compared with the traditional large vertical switch cabinet, this solution is more flexible in actual use. In addition, in the process of wiring components, holes can be opened on the surface of the switch cabinet door structure 1 or the horizontal switch cabinet structure 2, which is convenient for actual use.

[0037] When accommodating a multi-section flat distribution cabinet structure 2, one of them is to arrange two distribution cabinet frame members 21 in a positive and negative manner, so that the curling positioning members 24 on the sides of the two distribution cabinet frame members 21 are close to each other, so that the two curling positioning members 24 are rolled together by deformation to form a planar arrangement, which is more conducive to being placed in a narrow space for use. The material of the curling positioning member 24 can be selected from metal materials with good toughness and elasticity, including nickel-titanium memory alloy; another arrangement method is to stack the protrusions of the positioning protrusion 102 and the positioning protrusion 2 103 to form a longitudinal arrangement, and the final positioning can be secondary positioned by bolts, the components are installed in the flat distribution cabinet structure 2, and the wiring harness directly passes through the distribution cabinet door structure 1 or the flat distribution cabinet structure 2;

[0038] When the harness positioning mechanism 3 is actually used, the horizontal positioning rod 1 32 and the horizontal positioning rod 2 33 are positioned by the connecting support 37 and the two semicircular positioning members 311, wherein the width of the connecting support 37 determines the distance between the horizontal positioning rod 1 32 and the horizontal positioning rod 2 33, thereby adapting to component harnesses of different diameters. The components are installed between the two sets of harness positioning mechanisms 3 by bolts, and the harness of the components passes through the two middle rotating cylinders 36 to achieve the work of positioning the component harness, wherein the coil spring between the rod-shaped supporting member 313 and the annular limiting member 2 312 is used It helps the horizontal positioning rod 1 32 and the horizontal positioning rod 2 33 to reset, which is beneficial to the positioning of the entire row of wire harnesses and prevents the horizontal positioning rod 1 32 and the horizontal positioning rod 2 33 from rotating and shifting at will. In addition, when positioning the wire harness, the friction between the rotating cylinder 34 and the horizontal positioning rod 1 32 and the horizontal positioning rod 2 33 determines whether the wire harness is easy to pull out and how good the positioning effect is. If the wire harness needs to be firmly positioned, high friction materials such as rubber and raised blocks can be used; if the wire harness needs to be easy to move and adjust, low friction materials such as smooth metal materials can be used;

[0039] In addition, in actual use, the positioning panel frame 322 is installed inside the flat distribution cabinet structure 2 by bolts, and the installation slot 324 is a reserved installation hole for the bolts. The prefabricated buckle 323 cooperates with the S-shaped external part 321 to facilitate positioning and installation.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A combined power distribution cabinet, comprising a power distribution cabinet door structure (1) and a horizontal power distribution cabinet structure (2), characterized in that: The power distribution cabinet door structure (1) and the horizontal power distribution cabinet structure (2) are installed with each other in a combined manner, and a plurality of harness positioning mechanisms (3) for positioning component harnesses are installed inside the horizontal power distribution cabinet structure (2); The horizontal distribution cabinet structure (2) comprises a distribution cabinet frame member 1 (21), and distribution cabinet frame members 2 (22) are fixedly installed on both sides of the distribution cabinet frame member 1 (21), and a distribution cabinet frame member 3 (23) is fixedly installed on the side of the distribution cabinet frame member 2 (22) away from the distribution cabinet frame member 1 (21), and the distribution cabinet frame member 2 (22) and the distribution cabinet frame member 3 (23) form a raised support portion 1, and a curling positioning member (24) is fixedly installed on one side of the distribution cabinet frame member 3 (23), and the curling direction of the curling positioning member (24) faces the distribution cabinet frame member 1 (21); The number of the power distribution cabinet frame members (21) is set to be multiple, and the multiple power distribution cabinet frame members (21) are arranged in a cross-distribution arrangement in front and back order or stacked up and down, and two adjacent power distribution cabinet frame members (21) are wound around each other through two curling positioning members (24) to form a cross-distribution arrangement in front and back order.

2. A combined power distribution cabinet according to claim 1, characterized in that: The switch cabinet door structure (1) comprises a switch cabinet door panel (101), a positioning protrusion 1 (102) is fixedly mounted on one side of the switch cabinet door panel (101), a positioning protrusion 2 (103) is fixedly mounted on the side of the positioning protrusion 1 (102) away from the switch cabinet door panel (101), the positioning protrusion 1 (102) and the positioning protrusion 2 (103) form a raised support portion 2, and the distribution positions of the support portion 1 and the support portion 2 are arranged in a one-to-one correspondence.

3. A combined power distribution cabinet according to claim 2, characterized in that: A group of corner positioning members (104) are respectively installed on both sides of the distribution cabinet door panel (101), and the number of each group of corner positioning members (104) is set to two. The two groups of corner positioning members (104) correspond to the four corners of the flat distribution cabinet structure (2), and the corner positioning members (104) are installed with rubber gaskets (105) on the sides facing the distribution cabinet door panel (101).

4. A combined power distribution cabinet according to claim 3, characterized in that: The wiring harness positioning mechanism (3) comprises a flat support plate (31), the number of which is set to be multiple, and components are installed between the multiple wiring harness positioning mechanisms (3), and a transverse positioning rod (32) and a transverse positioning rod (33) are installed on the side of each of the flat support plates (31), wherein the wiring harness of the components is positioned by clamping the transverse positioning rod (32) and the transverse positioning rod (33).

5. A combined power distribution cabinet according to claim 4, characterized in that: The surfaces of the transverse positioning rod 1 (32) and the transverse positioning rod 2 (33) are rotatably connected to a plurality of groups of rotating cylinders (34), and the number of the rotating cylinders (34) in each group is set to two. A positioning disc (35) is fixedly installed on the side of the rotating cylinder (34), and a middle rotating cylinder (36) is installed between the two positioning discs (35) by bolts. The middle rotating cylinder (36) is rotatably connected to the outside of the transverse positioning rod 1 (32) or the transverse positioning rod 2 (33) through the rotating cylinder (34); A plurality of bolt-type positioning members (38) for extruding the wiring harness are fixedly mounted on the outer wall of the central rotating cylinder (36), and a prefabricated transverse groove (39) is provided in the middle of the bolt-type positioning member (38) in a through-shaped manner.

6. A combined power distribution cabinet according to claim 5, characterized in that: An annular limiting member (310) is fixedly installed at both ends of the transverse positioning rod (32) and the transverse positioning rod (33); a semicircular positioning member (311) is sleeved on the outer wall of the annular limiting member (310); the cross section of the semicircular positioning member (311) is C-shaped; a connecting support member (37) is fixedly installed between the two semicircular positioning members (311); An annular limiting member 2 (312) is installed at one end of the annular limiting member 1 (310), and the annular limiting member 2 (312) is arranged in a hollow shape. The inner cavity of the annular limiting member 2 (312) is plug-in and rotatably connected to a rod-shaped supporting member (313), and a coil spring for assisting resetting is installed between the rod-shaped supporting member (313) and the annular limiting member 2 (312).

7. A combined power distribution cabinet according to claim 6, characterized in that: An extension arm (314) is installed at one end of the rod-shaped supporting member (313) by means of bolts, a flat support plate 2 (315) is installed at one end of the extension arm (314), a flat support plate 3 (316) is installed at one side of the flat support plate 2 (315), and the flat support plate 3 (316) is fixedly connected to the flat support plate 1 (31); The flat support plate (31) is provided with a first through groove (317) and a second through groove (318) inside, the first through groove (317) and the second through groove (318) are connected, a wire harness positioning circular groove (319) is provided in the middle of the second through groove (318), and the position of the wire harness positioning circular groove (319) is consistent with the position of the central rotating cylinder (36); An S-shaped external component 1 (320) is installed on the side of the flat support plate 1 (31) through a through groove 1 (317), and an S-shaped external component 2 (321) is installed on the side of the S-shaped external component 1 (320). A positioning panel frame (322) is fixedly installed on the surface of the distribution cabinet frame 1 (21) through bolts, and prefabricated buckles (323) are fixedly installed on the top and bottom of the positioning panel frame (322). The prefabricated buckles (323) are clamped in the interior of the S-shaped external component 2 (321), and a mounting notch (324) is provided on the surface of the positioning panel frame (322).

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