Electric heat tracing explosion-proof power supply junction box

Abstract

The utility model discloses an electric heat tracing explosion-proof power supply junction box, which relates to the field of electric heat tracing belts, and aims to solve the problems that an existing electric heat tracing explosion-proof power supply junction box is heavy in weight and not easy to take and disassemble after being filled with explosion-proof mud, and is characterized by comprising a box body and a box cover fixed with the box body through screws, connecting angle plates are fixed into the box bodies through screws and installed at the corners of the box bodies, the upper connecting angle plate and the lower connecting angle plate are arranged at the corner of each box body, a metal protective net is elastically connected between every two adjacent connecting angle plates on the same plane, and fixing columns are fixed to the bottoms of the box bodies. The bottom end, away from the box body, of the fixing column is elastically and slidably connected with a threaded connecting column, a screw inserting column is fixed to the side, facing the box body, of the box cover and corresponds to the threaded connecting column, a screw is in threaded connection with the threaded connecting column after being inserted through the screw inserting column, and the technical effects of simple structure, light weight and multidirectional explosion prevention are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric heating tapes, in particular to an electric heating explosion-proof power junction box. Background Art

[0002] The junction box is one of the electrical auxiliary materials. In electrical engineering, explosion-proof power junction boxes are used. The junction box can protect the wires and joints, thereby protecting and controlling the circuit.

[0003] Electric heating cables are suitable for heating, antifreezing and thermal insulation of various process pipelines, equipment and tanks in industrial and mining enterprises. The electric heating cables are usually connected to the external power supply using a square box with a lid. The electric heating cables and wires and cables are fixed to the terminal posts through screws, and then the square box is filled with explosion-proof mud to achieve the wiring and explosion-proof effects. This method is not only inconvenient to use and heavy, but also greatly affects efficiency. Utility Model Content

[0004] The utility model aims to provide an electric heating explosion-proof power junction box which is simple in structure, light in weight and explosion-proof in all directions.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An electric heating explosion-proof power junction box comprises a box body and a box cover fixed with screws to the box body, characterized in that a connecting angle plate is fixed with screws inside the box body, and the connecting angle plate is installed at the corner of the box body. Two connecting angle plates are provided at upper and lower positions at each corner of the box body, and a metal protective net is elastically connected between two adjacent connecting angle plates on the same plane. A fixing column is fixed to the bottom of the box body, and the fixing column is elastically slidably connected with a threaded connecting column away from the bottom end of the box body. At the position of the threaded connecting column, a screw insertion column is fixed to the box cover facing the box body, and the screw is threadedly connected to the threaded connecting column after being inserted through the screw insertion column.

[0007] Furthermore, a fixing block is welded and fixed inside the connecting angle plate, fixing pipes are fixed on adjacent two sides of the fixing block, a connecting pipe is slidably connected inside the fixing pipe, and the metal protective net is fixed between the two oppositely arranged connecting pipes.

[0008] By adopting the above technical solution, the metal protective net is easy to install and easy to disassemble and replace after failure.

[0009] Furthermore, a first spring is fixed to the end of the connecting pipe away from the metal protective net, and the first spring is fixed inside the fixed pipe away from the end of the connecting pipe.

[0010] By adopting the above technical solution, after the metal protective net is impacted, the metal protective net is recessed toward the inner wall of the box body. At this time, the metal protective net drives the connecting pipes at both ends to move, and the connecting pipes begin to slide along the inside of the fixed pipe and begin to pull the first spring. After the first spring is stretched, it has elastic potential energy for reset. Then, while the metal protective net bends and recesses to absorb energy, the elastic potential energy of the first spring counteracts and offsets the impact force, thereby providing explosion-proof protection for the four inner walls of the box body.

[0011] Furthermore, a sliding rail is fixed on the inner wall of the fixed column, and the sliding rail is symmetrically arranged about the middle of the fixed column. A sliding block is slidably connected to the inside of the sliding rail, and a sliding column is fixed to the sliding block toward the bottom end of the sliding rail. The sliding column extends away from the sliding block end along the bottom of the sliding rail, and a second spring is sleeved on the outside of the sliding column. One end of the second spring is fixed to the bottom of the sliding block, and the other end is fixed to the bottom of the sliding rail.

[0012] By adopting the above technical solution, when an outward explosive force is generated inside the box body, it touches the metal protective mesh and the box cover at the same time, and the box cover moves upward, thereby avoiding direct damage to the box cover due to excessive rigidity of the box cover connection. At the same time, the box cover drives the screw installed inside the screw insertion column to move upward, and the threaded connection column is pulled, thereby driving the connecting rod and the sliding block to move. The sliding block slides along the inside of the slide rail, driving the second spring to stretch. At this time, the elastic potential energy of the second spring can offset the impact force, thereby protecting the box cover.

[0013] Furthermore, a connecting rod is fixed to the end of the sliding block away from the second spring, a connecting block is fixed to the other end of the connecting rod, and the connecting block is fixed to the inner wall of the threaded connecting column.

[0014] By adopting the above technical solution, an elastic connection between the threaded connection column and the fixed column is achieved.

[0015] Furthermore, a plurality of raised cotton bodies are fixed on the side of the box cover facing the box body, and the plurality of raised cotton bodies are evenly distributed on the inner wall of the box cover.

[0016] By adopting the above technical solution and utilizing the energy absorbing effect of the raised cotton body, the impact force inside the box body can be further absorbed, thereby further improving the explosion-proof protection effect of the box cover.

[0017] In summary, the beneficial technical effects of the present invention are:

[0018] 1. A connecting tube and a metal protective net are used. When the metal protective net is impacted, it dents toward the inner wall of the box body. At this time, the metal protective net drives the connecting tubes at both ends to move. The connecting tubes begin to slide along the inside of the fixed tube, and begin to pull the first spring. After the first spring is stretched, it has elastic potential energy for restoration. Then, while the metal protective net bends and dents to absorb energy, the elastic potential energy of the first spring counteracts the impact force, thereby providing explosion-proof protection for the four inner walls of the box body.

[0019] 2. Separate threaded connection columns and fixed columns are used to prevent the box cover from being directly damaged by excessive rigidity. At the same time, the box cover drives the screw installed inside the screw insertion column to move upward. At the same time, the threaded connection column is pulled, thereby driving the connecting rod and the sliding block to move. The sliding block slides along the inside of the slide rail, driving the second spring to stretch. At this time, the elastic potential energy of the second spring can offset the impact force, thereby protecting the box cover;

[0020] 3. The raised cotton body can absorb the impact force inside the box by utilizing the anti-impact and energy-absorbing effect of the raised cotton body when the temperature is too high, thereby further improving the explosion-proof protection effect of the box cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute part of the specification, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a structural diagram of an electric heating explosion-proof power junction box according to this embodiment;

[0023] Figure 2 This is an electric heating explosion-proof power junction box of this embodiment. Figure 1 Schematic diagram of the top view structure;

[0024] Figure 3 This is an electric heating explosion-proof power junction box of this embodiment. Figure 2 Middle AA cross-sectional view;

[0025] Figure 4 This is an electric heating explosion-proof power junction box of this embodiment. Figure 2 Schematic diagram of the BB cutaway;

[0026] Figure 5 This is an electric heating explosion-proof power junction box of this embodiment. Figure 4 Enlarged schematic diagram of point A in the middle.

[0027] In the figure, 1. box body; 2. box cover; 3. connecting angle plate; 4. metal protective net; 5. fixing column; 6. threaded connection column; 7. screw insertion column; 8. fixing block; 9. fixing tube; 10. first spring; 11. slide rail; 12. sliding block; 13. sliding column; 14. second spring; 15. connecting rod; 16. connecting block; 17. raised cotton body. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-5 The utility model provides a technical solution: an electric heating explosion-proof power junction box, comprising a box body 1 and a box cover 2 fixed with screws to the box body 1, the box body 1 is fixed with a connecting angle plate 3 with screws inside, the connecting angle plate 3 is installed at the corner of the box body 1, each corner of the box body 1 is provided with two connecting angle plates 3 in upper and lower positions, and a metal protective net 4 is elastically connected between two adjacent connecting angle plates 3 on the same plane. A fixing column 5 is fixed to the bottom of the box body 1, and the fixing column 5 is elastically slidably connected with a threaded connecting column 6 away from the bottom end of the box body 1. At the position of the threaded connecting column 6, a screw insertion column 7 is fixed to the side of the box cover 2 facing the box body 1, and the screw is threadedly connected with the threaded connecting column 6 after being inserted through the screw insertion column 7.

[0031] Among them, a fixing block 8 is welded and fixed inside the connecting angle plate 3, and fixing pipes 9 are fixed on the adjacent two sides of the fixing block 8. A connecting pipe is slidably connected inside the fixing pipe 9, and the metal protective net 4 is fixed between the two oppositely arranged connecting pipes.

[0032] A first spring 10 is fixed to the end of the connecting pipe away from the metal protective net 4 , and the first spring 10 is fixed inside the fixed pipe 9 away from the end of the connecting pipe.

[0033] Then, after the metal protective mesh 4 is impacted, the metal protective mesh 4 is recessed toward the inner wall of the box body 1. At this time, the metal protective mesh 4 drives the connecting pipes at both ends to move, and the connecting pipes begin to slide along the inside of the fixed pipe 9 and begin to pull the first spring 10. After the first spring 10 is stretched, it has elastic potential energy for reset. Then, while the metal protective mesh 4 bends and recesses to absorb energy, the elastic potential energy of the first spring 10 counteracts the impact force, thereby providing explosion-proof protection for the four inner walls of the box body 1.

[0034] At the same time, a slide rail 11 is fixed on the inner wall of the fixed column 5 inside the box body 1. The slide rail 11 is symmetrically arranged about the middle part of the fixed column 5. A sliding block 12 is slidably connected to the inside of the slide rail 11. A sliding column 13 is fixed to the sliding block 12 toward the bottom end of the slide rail 11. The sliding column 13 extends away from the end of the sliding block 12 along the bottom of the slide rail 11. A second spring 14 is sleeved on the outside of the sliding column 13. One end of the second spring 14 is fixed to the bottom of the sliding block 12, and the other end is fixed to the bottom of the slide rail 11.

[0035] A connecting rod 15 is fixed to the end of the sliding block 12 away from the second spring 14 , and a connecting block 16 is fixed to the other end of the connecting rod 15 . The connecting block 16 is fixed to the inner wall of the threaded connecting column 6 .

[0036] When an outward explosive force is generated inside the box body 1, it touches the metal protective mesh 4 and the box cover 2 at the same time, and the box cover 2 moves upward, thereby preventing the box cover 2 from being directly damaged by excessive connection rigidity. At the same time, the box cover 2 drives the screw installed inside the screw insertion column 7 to move upward, and at the same time the threaded connection column 6 is pulled, thereby driving the connecting rod 15 and the sliding block 12 to move. The sliding block 12 slides along the inside of the slide rail 11, driving the second spring 14 to stretch. At this time, the elastic potential energy of the second spring 14 can offset the impact force, thereby protecting the box cover 2.

[0037] In addition, a plurality of raised cotton bodies 17 are fixed on the side of the box cover 2 facing the box body 1. The raised cotton bodies 17 are evenly distributed on the inner wall of the box cover 2. The energy absorption effect of the raised cotton bodies 17 can further absorb the impact force inside the box body 1, thereby further improving the explosion-proof protection effect of the box cover 2.

[0038] The working principle of the present invention is as follows: the explosion-proof mud in the traditional technology is removed, and a metal protective net 4 with four-sided protection is set inside the box body 1. At the same time, elastically connected connecting pipes are pulled at both ends of the metal protective net 4 to provide explosion-proof protection for the four sides of the box body 1. At the same time, the box cover 2 is connected to the box body 1 through a connecting rod 15, a sliding block 12 and a second spring 14. The box cover 2 can be displaced relative to the box body 1 under the action of impact force, avoiding excessive connection rigidity, effectively protecting the box cover 2, and thus achieving multi-directional explosion protection.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric heating explosion-proof power junction box, comprising a box body (1) and a box cover (2) fixed to the box body (1) with screws, characterized in that: The box body (1) is internally fixed with a connecting angle plate (3) by screws. The connecting angle plate (3) is installed at the corner of the box body (1). Each corner of the box body (1) is provided with two connecting angle plates (3) at upper and lower positions. A metal protective net (4) is elastically connected between two adjacent connecting angle plates (3) on the same plane. A fixing column (5) is fixed at the bottom of the box body (1). The fixing column (5) is elastically slidably connected to a threaded connecting column (6) away from the bottom end of the box body (1). At the position corresponding to the threaded connecting column (6), a screw insertion column (7) is fixed on the side of the box cover (2) facing the box body (1). After the screw is inserted through the screw insertion column (7), it is threadedly connected to the threaded connecting column (6).

2. The electric heating explosion-proof power junction box according to claim 1, characterized in that: A fixing block (8) is welded and fixed inside the connecting angle plate (3), fixing pipes (9) are fixed on adjacent two sides of the fixing block (8), a connecting pipe is slidably connected inside the fixing pipe (9), and the metal protective net (4) is fixed between the two oppositely arranged connecting pipes.

3. The electric heating explosion-proof power junction box according to claim 2, characterized in that: A first spring (10) is fixed to the end of the connecting pipe away from the metal protective net (4), and the first spring (10) is fixed inside the fixed pipe (9) away from the end of the connecting pipe.

4. The electric heating explosion-proof power junction box according to claim 1, characterized in that: A slide rail (11) is fixed on the inner wall of the fixed column (5), and the slide rail (11) is symmetrically arranged about the middle of the fixed column (5). A sliding block (12) is slidably connected inside the slide rail (11), and a sliding column (13) is fixed to the end of the sliding block (12) toward the bottom of the slide rail (11). The end of the sliding column (13) away from the sliding block (12) extends along the bottom of the slide rail (11), and a second spring (14) is sleeved on the outside of the sliding column (13). One end of the second spring (14) is fixed to the bottom of the sliding block (12), and the other end is fixed to the bottom of the slide rail (11).

5. The electric heating explosion-proof power junction box according to claim 4, characterized in that: A connecting rod (15) is fixed to the end of the sliding block (12) away from the second spring (14), and a connecting block (16) is fixed to the other end of the connecting rod (15), and the connecting block (16) is fixed on the inner wall of the threaded connecting column (6).

6. The electric heating explosion-proof power junction box according to claim 4, characterized in that: A plurality of raised cotton bodies (17) are fixed on the side of the box cover (2) facing the box body (1), and the plurality of raised cotton bodies (17) are evenly distributed on the inner wall of the box cover (2).

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