High-voltage IIB-level explosion-proof junction box

Abstract

The utility model discloses a high-voltage IIB-level explosion-proof junction box, which belongs to the technical field of junction boxes and comprises a box body, a plurality of high-voltage pillar porcelain insulators are arranged at the upper end in the box body, a plurality of explosion-proof joints are arranged at the bottom of the box body, a box cover is connected to the side edge of the box body, and the box cover and the box body are fixed through fixing bolts. According to the utility model, the explosion-proof joint is arranged, a sealing ring with a corresponding aperture is installed according to the diameter of a wire, the fixing ring is screwed in the lower fixing seat, the sealing ring is fixed, the wire passes through the sealing ring, the lower fixing seat and the upper fixing seat to enter the box body, the lower fixing seat is screwed, and the wire is fixed through the pin hole. The lower fixing seat is in meshed connection with the fixing claw, the fixing claw is extruded and bent, the fixing claw clamps the electric wire, the sealing ring seals the connecting position of the electric wire and the box body, and the anti-explosion sealing effect is improved.

Description

Technical Field

[0001] This utility model belongs to the field of junction box technology, specifically relating to a high-voltage IIB-level explosion-proof junction box. Background Technology

[0002] Explosion-proof electrical appliances are a class of electrical products used in explosive gas or dust environments. Because conventional electrical appliances may generate sparks or even open flames during operation, they cannot be safely used in explosive environments. In this context, explosion-proof electrical appliances have emerged and gradually developed. In existing technologies, the basic design principles of explosion-proof electrical appliances are to eliminate spark generation through structural improvements or to fully isolate the appliance from the external environment. However, since different electrical appliances have different structures and operating principles, there is no universal design solution to achieve explosion-proof functionality across different appliances. Instead, a targeted design must be developed based on the specific characteristics of each appliance.

[0003] Existing high-voltage Class IIB explosion-proof junction boxes have the following drawbacks: poor performance of explosion-proof connectors, inability to fix wires of different diameters, poor sealing at wire connections, and a simple and unreliable cover fixing structure. Utility Model Content

[0004] To address the problems mentioned in the background section, this utility model provides a high-voltage IIB-class explosion-proof junction box, which features convenient fixing of explosion-proof connectors, good sealing performance, and a securely fixed box cover.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage IIB-level explosion-proof junction box, comprising a box body, wherein a plurality of high-voltage support porcelain insulators are provided at the upper part of the box body, a plurality of explosion-proof connectors are provided at the bottom of the box body, a box cover is connected to the side of the box body, the box cover is fixed to the box body by a fixing bolt, a fixing component is provided in the middle of the box cover, and pin holes are provided around the inner wall of the box body.

[0006] Preferably, the explosion-proof connector includes a sealing gasket, an upper fixing seat, fixing claws, a lower fixing seat, a sealing component, and a mounting groove. The lower end of the upper fixing seat is provided with a plurality of fixing claws, the surfaces of the fixing claws are threadedly engaged with the lower fixing seat, the inner wall of the lower fixing seat is provided with an inclined internal thread, the outer surface of the fixing claws is provided with an inclined external thread, the interior of the lower fixing seat is provided with a mounting groove, and the sealing component is provided in the middle of the mounting groove.

[0007] Preferably, the inner wall of the upper fixing seat is provided with a sealing gasket, and the sealing gasket is bonded and fixed to the inner wall of the upper fixing seat with strong adhesive.

[0008] Preferably, the sealing assembly includes a retaining ring and a sealing ring, wherein the sealing ring is provided at the bottom of the mounting groove, the retaining ring is provided at the upper end of the sealing ring, and the retaining ring is threadedly engaged with the inner wall of the lower fixing seat.

[0009] Preferably, the fixing assembly includes a return spring, a fixing pin, a connecting rod, a fixing plate, a pull rope, a drum, and a limiting block. The drum is connected to the middle of the side of the box cover, and the pull rope is connected to the surface of the drum. A fixing plate is provided in the middle of the four sides of the box cover. A connecting rod is movably connected to the middle of the fixing plate. A fixing pin is connected to the side of the connecting rod. A limiting block is connected to the other end of the connecting rod. A return spring is nested on the surface of the connecting rod between the fixing pin and the fixing plate.

[0010] Preferably, the fixing pin is inserted into the pin hole under the elastic force of the return spring, and the drum and the box cover are rotatably connected by a rotating shaft.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model is equipped with an explosion-proof connector. A sealing ring with a corresponding hole diameter is installed according to the wire diameter. The fixing ring is screwed into the lower fixing seat to fix the sealing ring. The wire is passed through the sealing ring, the lower fixing seat and the upper fixing seat into the box. The lower fixing seat is screwed on to make the lower fixing seat engage with the fixing claw. The fixing claw is squeezed and bent, and the fixing claw clamps the wire. The sealing ring seals the connection between the wire and the box, improving the explosion-proof sealing effect.

[0013] 2. This utility model is equipped with a fixing component. By rotating the drum, the pull rope moves the limiting block, which in turn moves the connecting rod on the fixing plate. The return spring is compressed, and the fixing pin moves. After the box cover is installed on the side of the box body, the drum is released, and the elastic force of the return spring moves the fixing pin. The fixing pin is inserted into the pin hole, realizing the quick fixing of the box cover. The fixing bolt passes through the box cover and is screwed to the box body for further fixing, ensuring a reliable fixation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the internal structure of the box of this utility model;

[0016] Figure 3 This is a schematic diagram of the explosion-proof connector structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the sealing component structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the fixing component structure of this utility model;

[0019] In the diagram: 1. Enclosure; 2. Enclosure cover; 3. Fixing bolt; 4. Fixing assembly; 41. Return spring; 42. Fixing pin; 43. Connecting rod; 44. Fixing plate; 45. Pull rope; 46. Drum; 47. Limiting block; 5. Explosion-proof connector; 51. Sealing gasket; 52. Upper fixing seat; 53. Fixing claw; 54. Lower fixing seat; 55. Sealing assembly; 551. Fixing ring; 552. Sealing ring; 56. Mounting groove; 6. High-voltage post porcelain insulator; 7. Pin hole. 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] Example 1

[0022] Please see Figure 1-5 The present invention provides the following technical solution: a high-voltage IIB-level explosion-proof junction box, including a box body 1, a plurality of high-voltage support porcelain insulators 6 are provided at the upper end of the box body 1, a plurality of explosion-proof connectors 5 are provided at the bottom of the box body 1, a box cover 2 is connected to the side of the box body 1, the box cover 2 is fixed to the box body 1 by a fixing bolt 3, a fixing component 4 is provided in the middle of the box cover 2, and pin holes 7 are opened around the inner wall of the box body 1.

[0023] Specifically, the explosion-proof connector 5 includes a sealing gasket 51, an upper fixing seat 52, fixing claws 53, a lower fixing seat 54, a sealing component 55, and a mounting groove 56. The lower end of the upper fixing seat 52 is provided with several fixing claws 53, and the surface of the fixing claws 53 is threadedly engaged with the lower fixing seat 54. The inner wall of the lower fixing seat 54 is provided with an inclined internal thread, and the outer surface of the fixing claws 53 is provided with an inclined external thread. The interior of the lower fixing seat 54 is provided with a mounting groove 56, and the sealing component 55 is provided in the middle of the mounting groove 56.

[0024] By adopting the above technical solution, the wire is passed through the lower fixing seat 54 and the upper fixing seat 52 into the housing 1. The lower fixing seat 54 is screwed on so that it engages with the fixing claw 53. The fixing claw 53 is squeezed and bent, and the fixing claw 53 clamps the wire. The sealing component 55 seals the connection between the wire and the housing 1, thereby improving the explosion-proof sealing effect.

[0025] Specifically, a sealing gasket 51 is provided on the inner wall of the upper fixing seat 52, and the sealing gasket 51 is bonded and fixed to the inner wall of the upper fixing seat 52 with strong adhesive.

[0026] By adopting the above technical solution, sealing is achieved and the wires are protected, preventing the fixing claw 53 from damaging the wires.

[0027] Specifically, the sealing assembly 55 includes a retaining ring 551 and a sealing ring 552. The sealing ring 552 is provided at the bottom of the mounting groove 56, and the retaining ring 551 is provided at the upper end of the sealing ring 552. The retaining ring 551 is threadedly engaged with the inner wall of the lower fixing seat 54.

[0028] By adopting the above technical solution, a sealing ring 552 with a corresponding hole diameter is installed according to the wire diameter, and a fixing ring 551 is screwed into the lower fixing seat 54 to fix the sealing ring 552. The wire is passed through the sealing ring 552, and the sealing ring 552 seals the connection between the wire and the box 1.

[0029] In this embodiment, a sealing ring 552 with a corresponding hole diameter is installed according to the wire diameter. The fixing ring 551 is screwed into the lower fixing seat 54 to fix the sealing ring 552. The wire is passed through the sealing ring 552, the lower fixing seat 54 and the upper fixing seat 52 into the housing 1. The lower fixing seat 54 is screwed on to make the lower fixing seat 54 engage with the fixing claw 53. The fixing claw 53 is squeezed and bent, and the fixing claw 53 clamps the wire. The sealing ring 552 seals the connection between the wire and the housing 1, improves the explosion-proof sealing effect, and realizes high-voltage IIB level explosion-proof wiring.

[0030] Example 2

[0031] The difference between this embodiment and embodiment 1 is that the fixing component 4 includes a return spring 41, a fixing pin 42, a connecting rod 43, a fixing plate 44, a pull rope 45, a drum 46, and a limiting block 47. The drum 46 is connected to the middle of the side of the box cover 2, and the pull rope 45 is connected to the surface of the drum 46. The fixing plate 44 is provided in the middle of the perimeter of the box cover 2. The connecting rod 43 is movably connected to the middle of the fixing plate 44. The fixing pin 42 is connected to the side of the connecting rod 43. The limiting block 47 is connected to the other end of the connecting rod 43. The return spring 41 is nested on the surface of the connecting rod 43 between the fixing pin 42 and the fixing plate 44.

[0032] By adopting the above technical solution, the drum 46 is turned so that the pull rope 45 pulls the limiting block 47 to move. The limiting block 47 pulls the connecting rod 43 to move on the fixed plate 44. The return spring 41 is compressed, and the fixing pin 42 moves. After the box cover 2 is installed on the side of the box body 1, the drum 46 is released. The elastic force of the return spring 41 causes the fixing pin 42 to move. The fixing pin 42 is inserted into the pin hole 7 to achieve quick fixing of the box cover 2. The fixing bolt 3 passes through the box cover 2 and is screwed to the box body 1 for further fixing to ensure a reliable fixation.

[0033] Specifically, the fixing pin 42 is inserted into the pin hole 7 under the elastic force of the return spring 41, and the drum 46 and the box cover 2 are rotatably connected by a rotating shaft.

[0034] By adopting the above technical solution, the elastic force of the return spring 41 causes the fixing pin 42 to move, and the fixing pin 42 is inserted into the pin hole 7, thereby achieving the quick fixing of the box cover 2.

[0035] In this embodiment, when the drum 46 is turned, the pull rope 45 pulls the limiting block 47 to move. The limiting block 47 pulls the connecting rod 43 to move on the fixed plate 44. The return spring 41 is compressed, and the fixing pin 42 moves. After the box cover 2 is installed on the side of the box body 1, the drum 46 is released. The elastic force of the return spring 41 causes the fixing pin 42 to move. The fixing pin 42 is inserted into the pin hole 7 to achieve quick fixing of the box cover 2. The fixing bolt 3 passes through the box cover 2 and is screwed to the box body 1 for further fixing to ensure a reliable fixation.

[0036] The working principle and usage process of this utility model are as follows: When using this utility model, install a sealing ring 552 with a corresponding hole diameter according to the wire diameter. Tighten the fixing ring 551 into the lower fixing seat 54 to fix the sealing ring 552. Pass the wire through the sealing ring 552, the lower fixing seat 54, and the upper fixing seat 52 into the housing 1. Tighten the lower fixing seat 54 to engage with the fixing claw 53. The fixing claw 53 is compressed and bent, clamping the wire. The sealing ring 552 seals the connection between the wire and the housing 1. High explosion-proof sealing effect, achieving high-pressure IIB level explosion-proof wiring; Twisting the drum 46 causes the pull rope 45 to pull the limit block 47 to move, the limit block 47 pulls the connecting rod 43 to move on the fixed plate 44, the return spring 41 is compressed, the fixing pin 42 moves, after the box cover 2 is installed on the side of the box body 1, the drum 46 is released, the elastic force of the return spring 41 causes the fixing pin 42 to move, the fixing pin 42 is inserted into the pin hole 7, realizing the quick fixing of the box cover 2, the fixing bolt 3 passes through the box cover 2 and screws it to the box body 1 for further fixing, ensuring a reliable fixation.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage Ex-IIB enclosure comprising a housing (1), characterized in that: The upper part of the box (1) is provided with several high-voltage support porcelain insulators (6), the bottom of the box (1) is provided with several explosion-proof connectors (5), the side of the box (1) is connected with a box cover (2), the box cover (2) is fixed to the box (1) by a fixing bolt (3), a fixing component (4) is provided in the middle of the box cover (2), and pin holes (7) are opened around the inner wall of the box (1).

2. A high-voltage IIB-rated explosion-proof junction box according to claim 1, characterized in that: The explosion-proof connector (5) includes a sealing gasket (51), an upper fixing seat (52), fixing claws (53), a lower fixing seat (54), a sealing component (55), and a mounting groove (56). The lower end of the upper fixing seat (52) is provided with several fixing claws (53). The surface of the fixing claws (53) is threadedly connected to the lower fixing seat (54). The inner wall of the lower fixing seat (54) is provided with an inclined internal thread. The outer surface of the fixing claws (53) is provided with an inclined external thread. The interior of the lower fixing seat (54) is provided with a mounting groove (56). The middle of the mounting groove (56) is provided with a sealing component (55).

3. A high-voltage IIB-rated explosion-proof junction box according to claim 2, characterized in that: The inner wall of the upper fixing seat (52) is provided with a sealing gasket (51), and the sealing gasket (51) is bonded and fixed to the inner wall of the upper fixing seat (52) by strong adhesive.

4. A high-voltage IIB-rated explosion-proof junction box according to claim 3, characterized in that: The sealing assembly (55) includes a retaining ring (551) and a sealing ring (552). The sealing ring (552) is provided at the bottom of the mounting groove (56), and the retaining ring (551) is provided at the upper end of the sealing ring (552). The retaining ring (551) is threadedly engaged with the inner wall of the lower fixing seat (54).

5. A high-voltage IIB-rated explosion-proof junction box according to claim 1, characterized in that: The fixing component (4) includes a return spring (41), a fixing pin (42), a connecting rod (43), a fixing plate (44), a pull rope (45), a drum (46), and a limiting block (47). The drum (46) is connected to the middle of the side of the box cover (2), and the pull rope (45) is connected to the surface of the drum (46). The fixing plate (44) is provided in the middle of the four sides of the box cover (2). The connecting rod (43) is movably connected to the middle of the fixing plate (44). The fixing pin (42) is connected to the side of the connecting rod (43). The limiting block (47) is connected to the other end of the connecting rod (43). The return spring (41) is nested on the surface of the connecting rod (43) between the fixing pin (42) and the fixing plate (44).

6. A high-voltage IIB-rated explosion-proof junction box according to claim 5, characterized in that: The fixing pin (42) is inserted into the pin hole (7) under the elastic force of the return spring (41), and the drum (46) and the box cover (2) are rotatably connected by a rotating shaft.

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