Explosion-proof power distribution device
By installing a rubber envelope outside the conductive column of the explosion-proof distribution device and adopting explosion-proof form of threaded joint surface and flat joint surface, the problem of poor sealing caused by gap between the explosion-proof box and the explosion-proof cover is solved, and high sealing and safer use is achieved.
Patent Information
- Application Number
- CN202420685482.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-07
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-07
AI Technical Summary
The existing explosion-proof power distribution devices are prone to errors during processing and assembly, resulting in a gap between the explosion-proof box and the explosion-proof cover, making it difficult to achieve effective sealing, and the potting glue is easily leaked, affecting the filling effect.
An explosion-proof power distribution device is designed. By installing a rubber envelope outside the conductive column and using the explosion-proof form of the first threaded joint surface at the corresponding positions of the rubber envelope, the explosion-proof chamber and the wiring chamber, the sealing colloid is not easily leaked after filling. At the same time, the first and second connecting parts are provided with explosion-proof form of a planar joint surface to reduce the overall thickness and improve the sealing property.
It effectively avoids the leakage of sealant, ensures the sealing between the explosion-proof box, the wiring box and the conductive column, improves the overall sealing performance, and makes the device have the characteristics of high sealing, reasonable structure and safer use.
Smart Images
Figure CN222673689U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power distribution devices, in particular to an explosion-proof power distribution device. Background Art
[0002] Explosion-proof distribution boxes have been widely used in chemical, military, mining and other industries. They generally include flameproof boxes, increased safety boxes and connecting parts between the flameproof boxes and the increased safety boxes. Various electrical components such as circuit breakers, contactors, fuses, etc. are installed in the flameproof box to form an electrical system; switching elements are provided in the increased safety box, and are connected to the electrical components in the flameproof box through lines to realize power supply and control of the electrical system.
[0003] In actual practice, due to inevitable errors in the processing and assembly process, there is a certain gap between the explosion-proof box and the explosion-proof cover, making it difficult to achieve effective sealing between the explosion-proof box and the explosion-proof cover. When the explosion-proof box and the junction box are in use, potting glue will be poured at the wire connection to ensure that the potting glue can fill the gap at the connection. If the sealing between the explosion-proof box and the junction box is poor, the potting glue will leak, affecting the filling of the potting glue. Utility Model Content
[0004] In view of the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide an explosion-proof power distribution device which has a reasonable structure, is safer to use, and has high sealing performance.
[0005] The technical solution adopted by the present invention to solve its technical problems is an explosion-proof power distribution device, comprising an explosion-proof box and a wiring box connected to the lower side of the explosion-proof box by external bolts, the circuit breaker is installed in the explosion-proof chamber of the explosion-proof box, the lower end of the circuit breaker is connected to a conductive column that passes through the wiring chamber of the wiring box, a rubber seal for filling a sealing colloid is provided outside the conductive column, the rubber seal and the lower end of the explosion-proof chamber and the upper end of the wiring chamber are explosion-proof in the form of a first threaded joint surface at corresponding positions, the outer ends of the side walls of the explosion-proof box are also extended outward to form a first connecting portion, and the first connecting portion of the explosion-proof box is connected by a first screw thread. An explosion-proof cover body is connected with a nail, and the outer ends of the side walls around the explosion-proof cover body extend outward to form a second connecting part. The second connecting part and the first connecting part adopt an explosion-proof form of a flat joint surface. The explosion-proof cover body is also provided with an operating handle that cooperates with the circuit breaker. The operating handle is connected to a rotating shaft through a pin shaft. One end of the rotating shaft and one end of the linkage mechanism of the circuit breaker form a plug-in fit. The other end of the rotating shaft is also provided with a cylindrical explosion-proof sleeve. The cylindrical explosion-proof sleeve and the explosion-proof cover body adopt an explosion-proof form of a second threaded joint surface. The cylindrical explosion-proof sleeve and the other end of the rotating shaft adopt an explosion-proof form of a cylindrical joint surface and are also provided with a first sealing ring.
[0006] The advantages of adopting the above technical solution are: by arranging a rubber seal for filling the sealing colloid outside the conductive column, and the rubber seal is matched with the explosion-proof form of the first threaded joint surface at the corresponding position of the lower end of the explosion-proof chamber and the upper end of the wiring chamber, it is not easy to leak the sealing colloid after filling, and at the same time, it can effectively ensure the sealing between the explosion-proof box, the wiring box and the conductive column. By arranging the first connecting part and the second connecting part in the explosion-proof form of the flat joint surface between the explosion-proof box and the explosion-proof cover, when the explosion-proof cover is locked relative to the explosion-proof box, the first connecting part can be connected to the explosion-proof cover. The end faces of the second connecting parts can form a complete fit with the end face of the first connecting part, which can effectively ensure the sealing between the explosion-proof box and the explosion-proof cover, and also reduce the overall thickness. By providing a cylindrical explosion-proof sleeve, and making the cylindrical explosion-proof sleeve and the rotating shaft and the explosion-proof cover respectively adopt a cylindrical joint surface and a second threaded joint surface to cooperate with the explosion-proof form, the sealing between the operating handle and the explosion-proof cover can be effectively ensured. Therefore, the explosion-proof distribution device has the characteristics of high sealing, and the overall structure is reasonable, safer to use, and has a wider range of use.
[0007] Furthermore, a first sealing gasket is provided at the bottom of the inner cavity of the rubber seal outside the conductive column, and a second sealing gasket is provided outside the rubber seal at the connection between the explosion-proof box and the junction box.
[0008] The advantages of adopting the above technical solution are: by setting the first sealing gasket, the problem of gaps caused by uneven flow of the colloid is avoided, making it less likely to leak during filling, and since errors will inevitably occur during the processing and assembly process, there will be a certain gap between the assembly of the explosion-proof box and the junction box. Therefore, by setting the second sealing gasket, the exposure of the rubber envelope to the outside world is avoided, thereby achieving effective sealing and making it safer to use.
[0009] Furthermore, a sealing ring groove is provided on the first connecting portion or the second connecting portion, and a second sealing ring is provided in the sealing ring groove.
[0010] The advantages of adopting the above technical solution are: through the coordinated arrangement of the first sealing ring groove and the second sealing ring, the second sealing ring can be effectively squeezed when the explosion-proof box body and the explosion-proof cover body are in contact, thereby increasing the sealing effect of the second sealing ring, and the explosion-proof sealing effect is better after the explosion-proof box body and the explosion-proof cover body are fixed.
[0011] Furthermore, the junction box is connected to a junction cover by a second screw, and an opening closed by the junction box is provided on the junction box, and the side walls around the opening extend toward the junction cover to form a first stop portion, and the end of the first stop portion is connected to a second stop portion that bends outward and extends, and a third sealing gasket is sandwiched between the second stop portion and the junction cover.
[0012] Advantages of the above technical solution: through the setting of the first stop portion, a protruding U-shaped waterproof portion is formed at the opening of the junction box. Through the setting of the second stop portion, when rainwater invades, it will be blocked by the second stop portion, and then flow out from both sides along the first stop portion without entering the explosion-proof box. The setting of the third sealing gasket makes the sealing performance of the junction box and the junction cover better.
[0013] Furthermore, a fastening sleeve is provided at a corresponding position of the junction box body, which cooperates with the second screw and extends inward. The side walls of the junction cover body extend toward the junction box body to form an installation support portion, and the installation support portion is supported on the junction box body.
[0014] The advantages of adopting the above technical solution are: through the setting of the fastening sleeve, the second screw is stably connected to the junction box body, and the setting of the mounting support portion enables the second screw to effectively and stably squeeze the third sealing gasket clamped between the second stop portion and the junction box body, and can further reduce the intrusion of rainwater to a certain extent.
[0015] Furthermore, an explosion-proof wire plug is provided at the line inlet at the lower end of the junction box, and the explosion-proof wire plug is fixed by a locking nut. A fourth sealing gasket is also provided at the connection between the explosion-proof wire plug and the junction box.
[0016] The advantages of adopting the above technical solution are: when the user needs to use the wire inlet on the junction box, just unscrew the explosion-proof wire plug and use the corresponding explosion-proof cable clamping device, which is convenient for the user to use, and the setting of the fourth sealing gasket ensures the sealing effect.
[0017] Furthermore, the explosion-proof box and the junction box are also provided with mounting beams for fixation.
[0018] Advantages of adopting the above technical solution: by setting the mounting beam, the wall-mounted installation mode of the explosion-proof box and the junction box is realized, thereby making the overall waterproof and moisture-proof effects better. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;
[0021] Figure 3 for Figure 2 A magnified view of the structure at point A;
[0022] Figure 4 for Figure 2 A magnified view of the structure at point B in FIG;
[0023] Figure 5 for Figure 2 A magnified view of the structure at point C in FIG;
[0024] Figure 6 for Figure 2 A magnified view of the structure at D in FIG;
[0025] Figure 7 for Figure 2 Enlarged view of the structure at E in .
[0026] In the figure: 1- explosion-proof box, 2- junction box, 3- circuit breaker, 4- conductive column, 5- rubber seal, 6- sealing colloid, 7- first threaded joint surface, 8- first connecting part, 9- first screw, 10- explosion-proof cover, 11- second connecting part, 12- flat joint surface, 13- operating handle, 14- rotating shaft, 15- cylindrical explosion-proof sleeve, 16- second threaded joint surface, 17- cylindrical joint surface, 18- first sealing ring, 19- A sealing gasket, 20-a second sealing gasket, 21-a sealing ring groove, 22-a second sealing ring, 23-a second screw, 24-a wiring cover, 25-a first stopper, 26-a second stopper, 27-a third sealing gasket, 28-a fastening sleeve, 29-a mounting support, 30-an explosion-proof wire plug, 31-a locking nut, 32-a fourth sealing gasket, 33-a mounting beam, 34-an explosion-proof box, 35-a wiring box, 36-a wiring terminal, 37-a conductive bar. DETAILED DESCRIPTION
[0027] To more clearly illustrate the embodiments of the present invention and / or the technical solutions in the prior art, the following describes specific embodiments of the present invention with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. A person skilled in the art can, without inventive effort, derive other drawings and other embodiments from these drawings. References to orientations only represent relative positional relationships between components, not absolute positional relationships.
[0028] See also Figures 1 to 7 As shown, an explosion-proof power distribution device includes an explosion-proof box 1, a junction box 2, and a circuit breaker 3. The junction box is connected to the lower side of the explosion-proof box 1 through external bolts, and the circuit breaker 3 is installed in the explosion-proof chamber of the explosion-proof box 1.
[0029] In this embodiment, the lower end of the circuit breaker 3 is connected to a conductive post 4 that passes through the wiring chamber of the junction box 2. A rubber sleeve 5 for filling a sealing colloid 6 is provided outside the conductive post 4. The rubber sleeve 5 has an explosion-proof form with a first threaded joint surface 7 at corresponding positions with the lower end of the explosion-proof chamber and the upper end of the wiring chamber. By providing the rubber sleeve 5 for filling the sealing colloid 6 outside the conductive post 4, and adopting the explosion-proof form of the first threaded joint surface 7 at corresponding positions with the lower end of the explosion-proof chamber and the upper end of the wiring chamber, the sealing colloid 6 is not easily leaked after being filled, and the sealing between the explosion-proof box 1, the junction box 2 and the conductive post 4 can be effectively ensured.
[0030] In this embodiment, the outer ends of the four side walls of the explosion-proof box 1 are also extended outward to form a first connecting portion 8. The explosion-proof cover body 10 is connected to the first connecting portion 8 of the explosion-proof box 1 by a first screw 9. The outer ends of the four side walls of the explosion-proof cover body 10 are extended outward to form a second connecting portion 11, and an explosion-proof form of a planar joint surface 12 is adopted between the second connecting portion 11 and the first connecting portion. By arranging the first connecting portion 8 and the second connecting portion 11 in the explosion-proof form of a planar joint surface 12 between the explosion-proof box 1 and the explosion-proof cover body 10, when the explosion-proof cover body 10 is locked relative to the explosion-proof box 1, the end face of the second connecting portion 11 can form a complete fit with the end face of the first connecting portion 8, which can effectively ensure the sealing between the explosion-proof box 1 and the explosion-proof cover body 10. In addition, this arrangement reduces the overall thickness while ensuring the stability of the sealed fixed installation.
[0031] In this embodiment, the explosion-proof cover body 10 is also provided with an operating handle 13 that cooperates with the circuit breaker 3. The operating handle 13 is connected to a rotating shaft 14 through a pin shaft. One end of the rotating shaft 14 is plugged into one end of the linkage mechanism of the circuit breaker 3. The other end of the rotating shaft 14 is also provided with a cylindrical explosion-proof sleeve 15. The cylindrical explosion-proof sleeve 15 and the explosion-proof cover body 10 adopt a second threaded joint surface 16 for explosion-proofing, and a cylindrical joint surface 17 is adopted between the cylindrical explosion-proof sleeve 15 and the other end of the rotating shaft 14 for explosion-proofing and a first sealing ring 18 is also provided. By providing the cylindrical explosion-proof sleeve 15 and making the cylindrical explosion-proof sleeve 15 and the rotating shaft 14 and the explosion-proof cover body 10 respectively adopt the cylindrical joint surface 17 and the second threaded joint surface 16 for explosion-proofing, the sealing between the operating handle 13 and the explosion-proof cover body 10 can be effectively ensured. Therefore, the explosion-proof power distribution device has the characteristics of high sealing, and the overall structure is reasonable, safer to use, and has a wider range of use.
[0032] In this embodiment, a first sealing gasket 19 is further provided at the bottom of the inner cavity of the rubber seal 5 outside the conductive column 4. The provision of the first sealing gasket 19 avoids the problem of gaps due to uneven flow of the colloid, making it less likely to leak during filling. In addition, since errors will inevitably occur during the processing and assembly process, there will be a certain gap between the assembly of the explosion-proof box 1 and the junction box 2. Therefore, a second sealing gasket 20 is further provided outside the rubber seal 5 at the connection between the explosion-proof box 1 and the junction box 2. This provision can, on the one hand, eliminate the installation gap, and on the other hand, avoid the exposure of the rubber seal 5 to the outside world, thereby achieving effective sealing and making it safer to use.
[0033] In this embodiment, a sealing ring groove 21 is further provided on the first connecting portion 8 or the second connecting portion 11, and a second sealing ring 22 is arranged in the sealing ring groove 21. Because the first connecting portion 8 and the second connecting portion 11 adopt an explosion-proof matching form with a planar joint surface, sealing measures are indispensable. Therefore, a sealing ring groove 21 is provided, and then a second sealing ring 22 is provided in the sealing ring groove 21, so that when the explosion-proof box body 1 contacts the explosion-proof cover body 10, the second sealing ring 22 can be effectively squeezed, thereby increasing the sealing effect of the second sealing ring 22, and the explosion-proof sealing effect is better after the explosion-proof box body 1 and the explosion-proof cover body 10 are fixed.
[0034] In this embodiment, the junction box 2 is connected to the junction cover 24 by second screws 23. The junction box 2 is provided with an opening closed by the junction cover 24. The side walls of the opening extend toward the junction cover 24 to form a first stop 25. The end of the first stop 25 is connected to a second stop 26 that bends outward. A third sealing gasket 27 is sandwiched between the second stop 26 and the junction cover 24. The provision of the first stop 25 forms a protruding U-shaped waterproof portion at the opening of the junction box. When rainwater enters the opening, it is blocked by the first and second stop 25, 26 and then flows out from both sides along the first stop 24 without entering the explosion-proof box 1. This arrangement prevents rainwater from entering the junction box 1 even when the connection is opened. The provision of the third sealing gasket 27 improves the sealing performance between the junction box 2 and the junction cover 24.
[0035] In this embodiment, a fastening sleeve 28 is provided at a corresponding position of the junction box 2, which cooperates with the second screw 23 and extends inward. The fastening sleeve 28 is tightly fitted with the junction box 2, and the fastening sleeve 28 is threadedly engaged with the second screw 23. This arrangement ensures that the second screw 23 is stably connected to the junction box 1. More specifically, the side walls of the junction cover 24 extend toward the junction box 2 to form a mounting support portion 29. The mounting support portion 29 is arranged on the outside of the first stop portion 25 and the second stop portion 26. The mounting position of the second screw 23 is also blocked by the mounting support portion 29. After the junction cover 24 is closed, the mounting support portion 29 is supported on the junction box 1. Through the provision of the mounting support portion 29, the second screw 23 can effectively and stably squeeze the third sealing gasket 27 sandwiched between the second stop portion 26 and the junction box 2, and can further reduce the intrusion of rainwater to a certain extent.
[0036] In this embodiment, an explosion-proof wire plug 30 is provided at the lower end of the junction box 2 at the wire inlet, and the explosion-proof wire plug 30 is fixed by a locking nut 31. A fourth sealing gasket 32 is also provided at the connection between the explosion-proof wire plug 30 and the junction box 2. When the user needs to use the wire inlet on the junction box 2, the explosion-proof wire plug 30 is unscrewed and equipped with a corresponding explosion-proof cable clamping device, which is convenient for the user to use, and the setting of the fourth sealing gasket 32 ensures the sealing effect.
[0037] In this embodiment, the explosion-proof box 1 and the junction box 2 are further provided with mounting beams 33 for fixing. By setting the mounting beams 33, the explosion-proof box 1 and the junction box 2 are wall-mounted, thereby making the overall waterproof and moisture-proof effects better.
[0038] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.
Claims
1. An explosion-proof power distribution device, comprising an explosion-proof box (1), and a wiring box (2) connected to the lower side of the explosion-proof box (1) by external bolts, a circuit breaker (3) installed in an explosion-proof chamber of the explosion-proof box (1), and a conductive column (4) penetrating into the wiring chamber of the wiring box (2) is connected at the lower end of the circuit breaker (3), characterized in that: The conductive column (4) is provided with a rubber seal (5) for filling a sealing colloid (6). The rubber seal (5) and the lower end of the explosion-proof chamber and the upper end of the wiring chamber have a first threaded joint surface (7) at the corresponding position. The outer ends of the surrounding side walls of the explosion-proof box (1) are also extended outward to form a first connecting portion (8). The first connecting portion (8) of the explosion-proof box (1) is connected to an explosion-proof cover (10) by a first screw (9). The outer ends of the surrounding side walls of the explosion-proof cover (10) are extended outward to form a second connecting portion (11). A plane joint surface (12) is used between the second connecting portion (11) and the first connecting portion (8). ), the explosion-proof cover (10) is also provided with an operating handle (13) for matching with the circuit breaker (3), the operating handle (13) is connected to a rotating shaft (14) via a pin shaft, one end of the rotating shaft (14) and one end of the linkage mechanism of the circuit breaker (3) form a plug-in fit, the other end of the rotating shaft (14) is also provided with a cylindrical explosion-proof sleeve (15), a second threaded joint surface (16) is adopted between the cylindrical explosion-proof sleeve (15) and the explosion-proof cover (10), a cylindrical joint surface (17) is adopted between the cylindrical explosion-proof sleeve (15) and the other end of the rotating shaft (14) and a first sealing ring (18) is also provided.
2. An explosion-proof power distribution device according to claim 1, characterized in that: A first sealing gasket (19) is also provided at the bottom of the inner cavity of the rubber seal (5) outside the conductive column (4), and a second sealing gasket (20) is also provided outside the rubber seal (5) at the connection between the explosion-proof box (1) and the junction box (2).
3. An explosion-proof power distribution device according to claim 1, characterized in that: A sealing ring groove (21) is also provided on the first connecting portion (8) or the second connecting portion (11), and a second sealing ring (22) is provided in the sealing ring groove (21).
4. An explosion-proof power distribution device according to claim 1, characterized in that: The junction box (2) is connected to a junction cover (24) by a second screw (23), and an opening is provided on the junction box (2) and is closed by the junction cover (24), and side walls around the opening extend toward the junction cover (24) to form a first stopper (25), and a second stopper (26) is connected to the end of the first stopper (25) and is bent and extended outward, and a third sealing gasket (27) is sandwiched between the second stopper (26) and the junction cover (24).
5. An explosion-proof power distribution device according to claim 4, characterized in that: A fastening sleeve (28) is provided at a corresponding position of the junction box (2) and cooperates with the second screw (23) and extends inwardly. The surrounding side walls of the junction cover (24) extend toward the junction box (2) to form a mounting support portion (29). The mounting support portion (29) is supported on the junction box (2).
6. An explosion-proof power distribution device according to claim 1, characterized in that: An explosion-proof wire plug (30) is provided at the lower end of the junction box (2) at the wire inlet, the explosion-proof wire plug (30) is fixed by a locking nut (31), and a fourth sealing gasket (32) is also provided at the connection between the explosion-proof wire plug (30) and the junction box (2).
7. An explosion-proof power distribution device according to claim 1, characterized in that: The explosion-proof box (1) and the junction box (2) are also provided with mounting beams (33) for fixing.