An explosion-proof wire-through box device

Abstract

The utility model relates to an anti -explosion type threading box device. Including the box body of front part open mouth, install the openable box cover on the front part open mouth, be equipped with a plurality of left side cable sealing interface on the left side wall of box body, be equipped with a plurality of right side cable sealing interface on the right side wall of box body, install the box inner substrate for installing fixed wiring assembly in the inner chamber middle part of box, be equipped with the heat conduction folding plate in the top and bottom of box inner substrate, install the cover heat dissipation board on the box cover, install the top heat dissipation board on the top of box body, install the bottom heat dissipation board on the bottom of box body, the top heat dissipation board is located the top of box inner substrate heat conduction folding board above and is equipped with heat conduction silica gel between both, the bottom heat dissipation board is located the bottom of box inner substrate heat conduction folding board below and is equipped with heat conduction silica gel between both. The utility model has the heat dissipation capacity, can release the heat of inside to external environment, guarantees the long -term anti -explosion characteristic of threading box by avoiding internal temperature rise too high.

Description

Technical Field

[0001] This utility model belongs to the field of explosion-proof equipment technology, and in particular relates to an explosion-proof junction box device. Background Technology

[0002] Explosion-proof junction boxes are a type of junction box product used in explosion-proof scenarios. Their function is to allow wiring to be passed through the box in an explosion-proof environment. By wiring inside the box, sparks from the wiring connections prevent the ignition of flammable and explosive gases or dust in the surrounding environment, thus achieving the purpose of explosion-proof safety. With the rapid development of industries such as petrochemicals, metal smelting, and pharmaceuticals, various types of explosion-proof junction boxes are being used more and more widely in system control.

[0003] Explosion-proof junction boxes typically have multiple sets of terminals inside. During application, external cables are threaded into the box through cable interfaces located on the box body and connected via the terminals. In practical use, it has been found that when using terminals for internal wiring, due to factors such as wiring resistance, the high current flowing through the cables generates heat, causing the internal temperature of the junction box to be significantly higher than the external ambient temperature. High temperatures inside the box will accelerate the aging or deformation of the junction box, internal terminals, and cable sheaths, thereby compromising the explosion-proof characteristics and reducing explosion-proof performance. Therefore, it is necessary to develop and design a new type of explosion-proof junction box to solve the aforementioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof junction box device with heat dissipation capabilities, which can dissipate internal heat to the external environment and ensure the long-term explosion-proof characteristics of the junction box by avoiding excessive internal temperature rise.

[0005] The technical solution adopted by this utility model is as follows: an explosion-proof cable box device, including a box body with an open front, an openable box cover installed on the open front, multiple left-side cable sealing interfaces provided on the left side wall of the box body, and multiple right-side cable sealing interfaces provided on the right side wall of the box body; an inner base plate for installing and fixing wiring components is installed in the middle of the inner cavity of the box body, heat-conducting baffles are provided at the top and bottom of the inner base plate, a cover heat dissipation plate is installed on the box cover, a top heat dissipation plate is installed at the top of the box body, and a bottom heat dissipation plate is installed at the bottom of the box body. The top heat dissipation plate is located above the heat-conducting baffles at the top of the inner base plate and heat-conducting silicone is provided between the two. The bottom heat dissipation plate is located below the heat-conducting baffles at the bottom of the inner base plate and heat-conducting silicone is provided between the two.

[0006] Preferably, the inner substrate, its top heat-conducting folding plate, and its bottom heat-conducting folding plate are integrally formed structures made of aluminum alloy.

[0007] Preferably, a plurality of supporting threaded rods extending forward and backward are installed and fixed on the rear wall of the box body, and connecting holes are provided at corresponding positions on the inner substrate of the box. Each supporting threaded rod is located in the connecting hole and the inner substrate of the box is clamped and fixed by two locking nuts at the front and rear.

[0008] Preferably, a window is provided on the top wall of the box, and a top heat dissipation plate is mounted and fixed on a top base plate. The top base plate is located above the window and is fixedly connected to the top wall of the box by multiple assembly screws and is provided with a sealing gasket.

[0009] Preferably, the lid consists of a frame and a cover plate. The frame is hinged to the box body. A sealing gasket is provided between the frame and the box body. After the lid is closed, it is fixed to the box body by multiple lid screws. A handle is also installed on the cover plate.

[0010] Preferably, a protective cover with an open bottom and a heat dissipation vent at the top is installed on the cover plate, and the heat dissipation plate is located inside the protective cover.

[0011] Preferably, the left cable sealing interface and the right cable sealing interface have the same structure, both including a base sleeve with internal threads that is fixed to the box body, a sealing filler and a pressure ring are provided inside the base sleeve, and a lock nut is installed at the end of the base sleeve.

[0012] Preferably, a fixing plate is provided at the four corners of the back of the box, and the fixing plate has a groove for mounting bolts to be inserted.

[0013] The advantages and positive effects of this utility model are: This utility model provides an explosion-proof junction box device. Compared with existing explosion-proof junction boxes, the explosion-proof junction box device of this utility model has a cover heat dissipation plate installed on the box cover, a top heat dissipation plate installed on the top, and a bottom heat dissipation plate installed on the bottom, thus possessing heat dissipation capabilities. During operation, the heat generated inside due to wiring resistance and current can be dissipated to the external environment through the cover heat dissipation plate, the top heat dissipation plate, and the bottom heat dissipation plate, thereby controlling the temperature rise inside the junction box and effectively preventing excessive temperature rise inside the junction box. Therefore, it can solve the problems of box deformation and component aging caused by high internal temperature conditions, and ensure the long-term explosion-proof characteristics of the junction box by avoiding excessive internal temperature rise.

[0014] This explosion-proof junction box device uses an internal base plate for installing wiring components. The base plate is efficiently heated by the top and bottom heat-conducting folds and thermally conductive silicone to the top and bottom heat dissipation plates, ensuring effective heat dissipation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external three-dimensional structure of this utility model, from a top view. Figure 2This is a schematic diagram of the internal structure of this utility model, viewed from below; Figure 3 This is a cross-sectional structural diagram of the present invention.

[0016] In the picture: 1. Box body; 2. Left side cable sealing interface; 3. Fixing plate; 4. Assembly screws; 5. Top heat sink; 6. Top base plate; 7. Heat dissipation vent; 8. Protective cover; 9. Box cover screws; 10. Cover plate; 11. Handle; 12. Cover heat sink; 13. Hinge; 14. Right side cable sealing interface; 15. Bottom heat sink; 16. Frame; 17. Support threaded rod; 18. Inner base plate; 19. Box top sealing gasket; 20. Cover sealing gasket. Detailed Implementation

[0017] To further understand the invention content, features and effects of this utility model, the following embodiments are provided in detail.

[0018] Please see Figure 1 , Figure 2 and Figure 3 The explosion-proof cable box device of this utility model includes a box body 1 with an open front, an openable box cover installed on the open front, multiple left-side cable sealing interfaces 2 on the left side wall of the box body 1, and multiple right-side cable sealing interfaces 14 on the right side wall of the box body 1.

[0019] In this embodiment, the box cover consists of a frame 16 and a cover plate 10. The frame 16 is hinged to the box body 1 using a hinge 13. A sealing gasket is provided between the frame 16 and the box body 1. After the box cover is closed, it is fixedly connected to the box body 1 using multiple box cover screws 9. A handle 11 is also installed on the cover plate 10. The aforementioned sealing gaskets include a cover sealing gasket 20 installed on the inside of the frame 16 and a box sealing gasket 19 installed on the front of the box body 1. When the box cover is closed and fixed by multiple box cover screws 9, the box sealing gasket 19 and the cover sealing gasket 20 come into contact and press together to achieve a reliable sealing effect, ensuring the sealing and explosion-proof characteristics of the wiring box.

[0020] In this embodiment, the left cable sealing interface 2 and the right cable sealing interface 14 have the same structure, both including a base sleeve with internal threads fixed to the housing 1. A sealing filler and a pressure ring are provided inside the base sleeve, and a locking nut is installed at the end of the base sleeve. When threading the cable, the cable is passed through the locking nut, pressure ring, and sealing filler. Then, the locking nut is rotated from the outside, pushing the pressure ring. After the pressure ring shifts, it compresses the sealing filler, causing it to deform and seal the cable passage, achieving an explosion-proof seal.

[0021] In this embodiment, fixing plates 3 are provided at the four corners of the back of the box 1, and the fixing plates 3 have grooves for mounting bolts to be inserted. During installation, this explosion-proof junction box device is fixedly connected to the wall or bracket using four bolts at the four corners.

[0022] An inner base plate 18 for mounting and fixing wiring assemblies is installed in the middle of the inner cavity of the housing 1. As shown in the figure, the wiring assembly ( Figure 3 As shown by the dashed lines, multiple sets of terminals (typically existing components) are mounted and fixed on the inner substrate 18 of the box. Cables pass through the left cable sealing interface 2 and the right cable sealing interface 14 into the box and are connected via wiring assemblies. In this embodiment, multiple front-to-back extending support threaded rods 17 are mounted and fixed on the rear wall of the box body 1. Connection holes are provided at corresponding positions on the inner substrate 18. Each support threaded rod 17 is located in its respective connection hole and is clamped and fixed to the inner substrate 18 using two locking nuts. Therefore, by adjusting the position of each set of locking nuts on each support threaded rod 17, the inner substrate 18 can be appropriately shifted back and forth.

[0023] Thermally conductive baffles are provided at the top and bottom of the inner substrate 18. A cover heat sink 12 is installed on the lid. A top heat sink 5 is installed at the top of the box body 1, and a bottom heat sink 15 is installed at the bottom of the box body 1. The top heat sink 5 is located above the thermally conductive baffles at the top of the inner substrate 18, with thermally conductive silicone between them. The bottom heat sink 15 is located below the thermally conductive baffles at the bottom of the inner substrate 18, with thermally conductive silicone between them. By ensuring that the top heat sink 5 and the bottom heat sink 15 are in close proximity to the thermally conductive baffles and filled with thermally conductive silicone, thermal conductivity can be guaranteed and heat dissipation effect can be improved.

[0024] In this embodiment, the inner substrate 18 and its top and bottom heat-conducting folding plates are integrally formed structures made of aluminum alloy. Specifically, the inner substrate 18 and its upper and lower heat-conducting folding plates can be milled from the same piece of aluminum alloy. In this embodiment, the cover heat sink 12, the top heat sink 5, and the bottom heat sink 15 are all made of aluminum alloy, making full use of the excellent thermal conductivity of aluminum alloy. Furthermore, the outer walls of the cover heat sink 12, the top heat sink 5, and the bottom heat sink 15 are machined into a toothed surface to improve the heat dissipation effect.

[0025] In this embodiment, a window is provided on the top wall of the box body 1, and the top heat dissipation plate 5 is installed and fixed on a top base plate 6. The top base plate 6 is located above the window and is fixedly connected to the top wall of the box body 1 by multiple assembly screws 4 and is provided with a sealing gasket. This structure is used to improve the ease of operation when assembling this explosion-proof wiring box device.

[0026] In this embodiment, a protective cover 8 with an open bottom and a heat dissipation vent at the top is installed on the cover plate 10, and the heat dissipation plate 12 is located inside the protective cover 8. The purpose of the protective cover 8 is to enclose the heat dissipation plate 12 inside and prevent it from being exposed, thus preventing the operator from contacting the heat dissipation plate 12.

[0027] How to use: Open the box cover and remove the top substrate 6 and its top heat sink 5. Apply thermal conductive silicone to the upper surface of the thermally conductive baffle on the upper part of the inner substrate 18 and to the lower surface of the thermally conductive baffle. Then, insert the inner substrate 18 into the box from the window on the top wall, insert the support threaded rod 17 into the connection hole on the inner substrate 18, and install the lock nut to fix the inner substrate 18. Then, fix the top substrate 6 to the top wall of the box body 1. Pass the cable through the left cable sealing interface 2 and the right cable sealing interface 14 into the box and connect it to the wiring assembly on the inner substrate 18. Then, rotate the locking nuts of the left cable sealing interface 2 and the right cable sealing interface 14 to squeeze the sealing filler to seal the cable passage. Then, close the box cover and fix the box cover to the box body 1 using multiple box cover screws 9.

Claims

1. An explosion-proof junction box device, characterized in that: The box includes a front-opening box (1) with an openable cover. Multiple left-side cable sealing interfaces (2) are provided on the left side wall of the box (1), and multiple right-side cable sealing interfaces (14) are provided on the right side wall of the box (1). An inner base plate (18) for installing and fixing wiring components is installed in the middle of the inner cavity of the box (1). Heat-conducting baffles are provided at the top and bottom of the inner base plate (18). A cover heat sink (12) is installed on the cover. A top heat sink (5) is installed at the top of the box (1), and a bottom heat sink (15) is installed at the bottom of the box (1). The top heat sink (5) is located above the heat-conducting baffle at the top of the inner base plate (18) and heat-conducting silicone is provided between them. The bottom heat sink (15) is located below the heat-conducting baffle at the bottom of the inner base plate (18) and heat-conducting silicone is provided between them.

2. The explosion-proof junction box device as described in claim 1, characterized in that: The inner substrate (18) and its top and bottom heat-conducting folding plates are integrally formed structures made of aluminum alloy.

3. The explosion-proof junction box device as described in claim 2, characterized in that: Multiple supporting threaded rods (17) extending forward and backward are installed and fixed on the rear wall of the box body (1). Connection holes are provided at corresponding positions on the inner substrate (18). Each supporting threaded rod (17) is located in the connection hole and is clamped and fixed to the inner substrate (18) by two locking nuts.

4. The explosion-proof junction box device as described in claim 3, characterized in that: A window is provided on the top wall of the box (1), and a top heat sink (5) is installed and fixed on a top base plate (6). The top base plate (6) is located above the window and is fixedly connected to the top wall of the box (1) by multiple assembly screws (4) and is provided with a sealing gasket.

5. The explosion-proof junction box device as described in claim 4, characterized in that: The lid is composed of a frame (16) and a cover plate (10). The frame (16) is hinged to the box body (1) by a hinge (13). A sealing gasket is provided between the frame (16) and the box body (1). After the lid is closed, it is fixedly connected to the box body (1) by multiple lid screws (9). A handle (11) is also installed on the cover plate (10).

6. The explosion-proof junction box device as described in claim 5, characterized in that: in A protective cover (8) with an open bottom and a heat dissipation vent (7) on the top is installed on the cover plate (10), and a heat dissipation plate (12) is placed inside the protective cover (8).

7. The explosion-proof junction box device as described in claim 6, characterized in that: The left cable sealing interface (2) and the right cable sealing interface (14) have the same structure. Both include a base sleeve with internal threads that is fixed to the box body (1). A sealing filler and a pressure ring are provided inside the base sleeve. A locking nut is installed at the end of the base sleeve.

8. The explosion-proof junction box device as described in claim 7, characterized in that: Fixing plates (3) are provided at the four corners of the back of the box (1), and the fixing plates (3) have grooves for mounting bolts to be inserted.

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