A quick assembly structure for explosion-proof junction boxes

Abstract

This utility model relates to the field of explosion-proof junction box technology, specifically a quick assembly structure for an explosion-proof junction box. It includes an explosion-proof junction box body, an explosion-proof enclosure on the body, wiring terminals installed inside the enclosure, and cable entry devices evenly spaced on the outer side of the enclosure. An explosion-proof sealing cover is located on top of the enclosure, and a sealing ring engaging with the enclosure is fitted below it. A limit post is welded to the bottom of the sealing cover. An assembly positioning shell is provided on the exterior of the junction box body. This quick assembly structure secures the explosion-proof junction box and the explosion-proof sealing cover through threaded and bolted fastening. The assembly positioning shell on the exterior of the enclosure provides dust protection and secure positioning of the cable entry devices. Compared to traditional assembly structures, this method is simpler and more stable, improving assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof junction box technology, specifically to a quick assembly structure for an explosion-proof junction box. Background Technology

[0002] An explosion-proof junction box is an electrical connection device specifically designed for use in hazardous environments containing explosive gases, vapors, or dust. Its primary function is to prevent explosions caused by electrical sparks, thereby protecting personnel safety and the integrity of equipment. Explosion-proof junction boxes are typically made of high-strength and corrosion-resistant materials such as aluminum alloy and stainless steel, and possess excellent sealing performance. They effectively prevent external explosive gases or dust from entering the junction box and are widely used in flammable and explosive environments such as petroleum, chemical, natural gas extraction and processing, coal mining, pharmaceuticals, and paint production. They are not only used for connecting electrical wires and cables but also serve as safe installation locations for sensors, switches, instruments, and other electrical equipment.

[0003] When assembling existing explosion-proof junction boxes, the base and cover are fixed by screwing together with a threaded structure or by bolts. However, at least four bolts are required. If there are errors in the manufacturing process, the positioning will not be accurate enough. Threaded fixing is also prone to loosening. Furthermore, if the cable entry device on the side of the explosion-proof junction box is not properly secured when the cable is not fixed, the sealing structure will fail, thus affecting the safe use of the explosion-proof junction box. Utility Model Content

[0004] The purpose of this utility model is to provide a quick assembly structure for explosion-proof junction boxes, so as to solve the problems mentioned in the background art, where explosion-proof junction boxes on the market are currently fixed by bolts or threads during assembly, resulting in inaccurate positioning and easy loosening. At the same time, the sealing parts at the cable entry device may fail to seal due to insufficient fixation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quick assembly structure for an explosion-proof junction box, comprising an explosion-proof junction box body, an explosion-proof box on the explosion-proof junction box body, wiring terminals installed inside the explosion-proof box, and cable entry devices evenly spaced on the outer side of the explosion-proof box, an explosion-proof sealing cover on the top of the explosion-proof box, a sealing ring engaging with the explosion-proof box below the explosion-proof sealing cover, and a limit post fixedly welded to the bottom of the explosion-proof sealing cover, an assembly positioning shell on the outside of the explosion-proof junction box body, the bottom of the assembly positioning shell being securely engaged with the bottom of the explosion-proof box, and a positioning seat integrally provided inside the assembly positioning shell for securely engaging with the cable entry devices, a sealing snap plate engaging at the positioning seat on the inner side of the assembly positioning shell, and a fastening protrusion integrally provided on the side of the sealing snap plate corresponding to the position of the cable entry devices, and a fixed edge integrally provided on the outer ring of the explosion-proof box, with limit holes and mounting holes spaced apart on the fixed edge, and the limit holes being movably inserted into the limit posts.

[0006] Preferably, the bottom of the assembly positioning housing is symmetrically perforated with positioning screws, and the inner side of the assembly positioning housing is also integrally provided with heat dissipation fins. The assembly positioning housing is provided with through holes corresponding to the position of the cable introduction device, and the size of the sealing snap plate is larger than the size of the through holes on the side of the assembly positioning housing.

[0007] Preferably, the assembly positioning shell is covered with a dustproof cover, and a matching hinge seat is fixed between the dustproof cover and the assembly positioning shell.

[0008] Preferably, a reinforcing plate with an arc-shaped structure is embedded and fixed inside the sealing snap plate, and a pull-out hole is opened at the upper end of the sealing snap plate and the reinforcing plate together.

[0009] Preferably, the bottom and sides of the explosion-proof box are integrally provided with reinforcing ribs, and the upper part of the inner side of the explosion-proof box is provided with internal threads.

[0010] Preferably, the cable introduction device has a through hole communicating with the inside of the explosion-proof box, and the outer end of the through hole of the cable introduction device has a threaded structure.

[0011] Preferably, the cable fixing member is rotated and tightened at the threaded hole of the cable introduction device, and the cable fixing member is tightly engaged with the fastening protrusion.

[0012] Preferably, the explosion-proof sealing cover has a T-shaped cross-section, and the outer ring at the bottom of the explosion-proof sealing cover is provided with an external thread that is fastened to the internal thread, and a rotating hole is provided at the upper end of the explosion-proof sealing cover.

[0013] Compared with existing technologies, the advantages of this utility model are as follows: The explosion-proof junction box quick-assembly structure is secured by threaded and bolted fixing between the explosion-proof box and the explosion-proof sealing cover. An assembly positioning shell is provided outside the explosion-proof box for dust prevention and positioning and securing of the cable entry device. Compared with traditional assembly structures, the assembly method is simpler and more stable, improving assembly efficiency. The explosion-proof junction box quick-assembly structure has a sealing snap-fit ​​plate inside the assembly positioning shell that corresponds to the position of the cable entry device. This sealing snap-fit ​​plate can seal the cable entry device, ensuring the stability of the sealing structure and preventing seal failure. Simultaneously, the positioning seat inside the assembly positioning shell secures both the sealing snap-fit ​​plate and the cable entry device, ensuring the stability of the assembled explosion-proof junction box structure. Attached Figure Description

[0014] Figure 1 This is a top view of a quick assembly structure for an explosion-proof junction box according to this utility model;

[0015] Figure 2 This utility model relates to a quick assembly structure for an explosion-proof junction box. Figure 1 Enlarged structural diagram at point A in the middle;

[0016] Figure 3 This is a schematic diagram of the sealing snap-fit ​​plate structure of a quick assembly structure for an explosion-proof junction box according to this utility model;

[0017] Figure 4 This is an open side view of a quick assembly structure for an explosion-proof junction box according to the present invention;

[0018] Figure 5 This is a side view of a quick assembly structure for an explosion-proof junction box according to this utility model.

[0019] In the diagram: 1. Explosion-proof junction box body; 2. Assembly positioning shell; 201. Positioning screw; 202. Positioning seat; 203. Dustproof cover; 204. Hinge seat; 205. Heat dissipation fin; 3. Terminal block; 4. Sealing snap plate; 401. Reinforcing plate; 402. Fastening protrusion; 403. Pull-out hole; 5. Explosion-proof box; 501. Limiting hole; 502. Fixing edge; 503. Mounting hole; 504. Reinforcing rib; 505. Internal thread; 6. Cable entry device; 601. Cable fastener; 7. Explosion-proof sealing cover; 701. Rotating hole; 702. External thread; 703. Limiting post; 8. Sealing ring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5This utility model provides a technical solution: a quick assembly structure for an explosion-proof junction box, including an explosion-proof junction box body 1, an explosion-proof box 5 on the explosion-proof junction box body 1, and wiring terminals 3 installed inside the explosion-proof box 5. Cable entry devices 6 are evenly spaced and fixed on the outer side of the explosion-proof box 5. An explosion-proof sealing cover 7 is provided above the explosion-proof box 5, and a sealing ring 8 that seals with the explosion-proof box 5 is engaged below the explosion-proof sealing cover 7. A limit post 703 is fixed to the bottom of the explosion-proof sealing cover 7 by welding. An assembly positioning shell 2 is provided outside the explosion-proof junction box body 1. A dustproof cover 203 is provided on top of the assembly positioning shell 2, and a matching hinge seat 204 is fixed between the dustproof cover 203 and the assembly positioning shell 2. This structure allows the dustproof cover 203 and the assembly positioning shell 2 to work together. The positioning shells 2 are sealed with rubber rings to further improve the moisture-proof effect. The dust cover 203 can be flipped open via the hinge seat 204 to provide basic positioning for the assembly of the explosion-proof box 5, improving the protective performance. The bottom of the positioning shell 2 is firmly locked to the bottom of the explosion-proof box 5. The positioning shell 2 is integrally provided with a positioning seat 202 that is firmly locked to the cable entry device 6. A sealing locking plate 4 is engaged with the positioning seat 202 on the inner side of the positioning shell 2. Positioning screws 201 are symmetrically inserted through the bottom of the positioning shell 2. The inner side of the positioning shell 2 is also integrally provided with heat dissipation fins 205. The positioning shell 2 has through holes corresponding to the position of the cable entry device 6, and the size of the sealing locking plate 4 is larger than the side of the positioning shell 2. The size of the through hole allows the assembly positioning housing 2 to be cooled by the heat dissipation fins 205. This ensures efficient heat dissipation for the explosion-proof junction box body 1 while also providing dust protection and further sealing against moisture. The sealing snap plate 4 has an integrally formed fastening protrusion 402 on its side corresponding to the cable entry device 6. An arc-shaped reinforcing plate 401 is embedded and fixed within the sealing snap plate 4. Both the sealing snap plate 4 and the reinforcing plate 401 have a pull-out hole 403 at their upper ends. This structure makes the sealing snap plate 4 and the fastening protrusion 402 a single piece of rubber material, with the reinforcing plate 401 forming a rigid positioning structure, ensuring the stability of the sealing snap plate 4. Simultaneously, the sealing snap plate 4 can seal the connection between the assembly positioning housing 2 and the cable entry device. Between positions 6, when the cable is not fixed inside the cable entry device 6, an efficient moisture-proof sealing effect can be ensured, preventing sealing failure from affecting the use of the explosion-proof junction box body 1. At the same time, the sealing method is simpler and more stable. The outer ring of the explosion-proof box 5 is integrally provided with a fixing edge 502, and the fixing edge 502 is provided with limit holes 501 and mounting holes 503 at intervals. The limit holes 501 are movably inserted with the limit posts 703. The bottom and sides of the inner side of the explosion-proof box 5 are integrally provided with reinforcing ribs 504, and the upper part of the inner side of the explosion-proof box 5 is provided with internal threads 505. This structure allows the explosion-proof box 5 to strengthen the internal structure through the reinforcing ribs 504, and to securely install the terminal block 3. The cable entry device 6 has a through hole that communicates with the inside of the explosion-proof box 5.Furthermore, the outer end of the through hole of the cable introduction device 6 has a threaded structure. This structure allows the cable to pass through the cable introduction device 6 and enter the explosion-proof box 5. The cable fixing part 601 is rotated and tightened at the threaded hole of the cable introduction device 6, and the cable fixing part 601 is tightly engaged with the fastening protrusion 402. This structure of the cable fixing part 601 is an existing structure for cable fixing, which can be made of plastic or alloy material. By introducing the cable into the explosion-proof box 5 and connecting it to the terminal block 3, the wiring fixing is achieved. The fastening protrusion 402 then seals the cable fixing part 601 when the cable is not being fixed. The explosion-proof sealing cover 7... The explosion-proof sealing cover 7 has a T-shaped cross-section, and its bottom outer ring is provided with an external thread 702 that is fastened to the internal thread 505. A rotation hole 701 is provided at the top of the explosion-proof sealing cover 7. During assembly and fixing, the explosion-proof sealing cover 7 is positioned by the insertion of a limiting post 703 into the limiting hole 501. Then, the explosion-proof sealing cover 7 is tightened relative to the explosion-proof box 5 through the engagement of the external thread 702 and the internal thread 505. Finally, two screws are fixed through the mounting hole 503, thus securing the explosion-proof sealing cover 7 to the explosion-proof box 5. This reduces the number of bolts and improves assembly efficiency and stability.

[0022] Working Principle: When using this explosion-proof junction box quick assembly structure, firstly, the terminal block 3 is installed into the explosion-proof box 5, and positioned by the reinforcing rib 504. The reinforcing rib 504 also strengthens the structural strength of the explosion-proof box 5. Then, the explosion-proof box 5 is snapped into the assembly positioning shell 2, and the cable entry device 6 is snapped between the positioning seats 202, achieving relative stability between the explosion-proof box 5 and the assembly positioning shell 2. Next, the cable is passed through the assembly positioning shell 2 into the cable entry device 6. The cable entry device 6 uses the cable fixing component 601 to seal and secure the cable, allowing it to smoothly enter the explosion-proof box 5 and electrically connect to the terminal block 3. At the cable entry device 6 where the cable is not secured, the sealing snap plate 4 is snapped between the positioning seats 202, and the fastening protrusion 402 is inserted into the cable fixing component 601 to achieve a seal. Simultaneously, the reinforcing plate 401 provides a rigid positioning structure to ensure a secure snap-fit. To ensure the stability of the plate 4 structure, if the cable entry device 6 is to be used, the sealing snap plate 4 can be easily pulled out through the pull hole 403. When the explosion-proof sealing cover 7 is covered, the limiting post 703 is inserted into the limiting hole 501, and the explosion-proof sealing cover 7 is rotated relative to the explosion-proof box 5 through the rotation hole 701, so that the external thread 702 and the internal thread 505 cooperate to lock it. Then, the explosion-proof sealing cover 7 and the explosion-proof box 5 are fixed with bolts through the mounting hole 503. The fixing edge 502 provides a positioning point for the explosion-proof box 5. The sealing ring 8 plays a sealing and fastening role between the explosion-proof sealing cover 7 and the explosion-proof box 5. Finally, the assembly positioning shell 2 is positioned and stabilized by the positioning screw 201. Finally, the dust cover 203 is covered. The hinge seat 204 is used for the rotation and opening of the dust cover 203. During the operation of the explosion-proof junction box body 1, the heat dissipation fins 205 ensure the heat dissipation effect, thereby completing a series of tasks.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick assembly structure of an explosion-proof terminal box, comprising an explosion-proof terminal box body (1), characterized in that: The explosion-proof junction box body (1) is provided with an explosion-proof box (5), and a terminal block (3) is installed inside the explosion-proof box (5). Cable entry devices (6) are evenly spaced on the outer side of the explosion-proof box (5). An explosion-proof sealing cover (7) is provided on the top of the explosion-proof box (5), and a sealing ring (8) that seals with the explosion-proof box (5) is engaged below the explosion-proof sealing cover (7). A limit post (703) is fixed to the bottom of the explosion-proof sealing cover (7) by welding. An assembly positioning shell (2) is provided on the outside of the explosion-proof junction box body (1), and the bottom of the assembly positioning shell (2) is fastened to the bottom of the explosion-proof box (5). The assembly positioning housing (2) is integrally provided with a positioning seat (202) that is fastened to the cable introduction device (6). The inner side of the assembly positioning housing (2) is fitted with a sealing snap plate (4) at the positioning seat (202), and the side of the sealing snap plate (4) is integrally provided with a fastening protrusion (402) corresponding to the position of the cable introduction device (6). The outer ring of the explosion-proof box (5) is integrally provided with a fixed edge (502), and the fixed edge (502) is provided with a limit hole (501) and a mounting hole (503) at intervals, and the limit hole (501) is movably inserted into the limit post (703).

2. The explosion-proof junction box quick assembly structure according to claim 1, characterized in that: The bottom of the assembly positioning shell (2) is symmetrically perforated with positioning screws (201), and the inner side of the assembly positioning shell (2) is also integrally provided with heat dissipation fins (205). The assembly positioning shell (2) has through holes corresponding to the position of the cable introduction device (6), and the size of the sealing snap plate (4) is larger than the size of the through holes on the side of the assembly positioning shell (2).

3. The explosion-proof junction box quick assembly structure according to claim 1, characterized in that: The assembly positioning shell (2) is covered with a dust cover (203), and a matching hinge seat (204) is fixed between the dust cover (203) and the assembly positioning shell (2).

4. The explosion-proof junction box quick assembly structure according to claim 1, characterized in that: The sealing snap plate (4) has an embedded and fixed reinforcing plate (401) with an arc structure, and the upper end of the sealing snap plate (4) and the reinforcing plate (401) are provided with a pull-out hole (403).

5. The explosion-proof junction box quick assembly structure according to claim 1, characterized in that: The explosion-proof box (5) has a reinforcing rib (504) integrally provided on the bottom and sides of the inner side, and an internal thread (505) is provided on the upper part of the inner side of the explosion-proof box (5).

6. The explosion-proof junction box quick assembly structure according to claim 1, characterized in that: The cable introduction device (6) has a through hole that communicates with the inside of the explosion-proof box (5), and the outer end of the through hole of the cable introduction device (6) has a threaded structure.

7. The explosion-proof junction box quick assembly structure according to claim 6, characterized in that: The cable introduction device (6) is rotated and tightened at the threaded hole of the cable fixing member (601), and the cable fixing member (601) is tightly engaged with the fastening protrusion (402).

8. The explosion-proof junction box quick assembly structure according to claim 5, characterized in that: The explosion-proof sealing cover (7) has a T-shaped cross section, and the outer ring of the bottom of the explosion-proof sealing cover (7) is provided with an external thread (702) that is fastened to the internal thread (505), and a rotating hole (701) is provided at the upper end of the explosion-proof sealing cover (7).

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