Explosion-proof wire passing structure of explosion-proof distribution box
By adopting the same specification of the through-head and threaded fixing structure in the explosion-proof distribution box, the problems of complex assembly and insufficient explosion-proof performance in the prior art are solved, and the effect of reducing processing costs and improving explosion-proof performance is achieved.
Patent Information
- Application Number
- CN202421174731.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The explosion-proof over-wire structure of the existing explosion-proof distribution box is prone to misinstallation during the assembly process, which increases processing cost and complexity, and the increased number of openings reduces explosion-proof performance.
The same specification of the through head is directly fixed to the distribution module by threads, which reduces the use of bolts, simplifies the assembly process, and improves explosion-proof performance through sealant and rubber separator.
It reduces processing costs and complexity, improves assembly efficiency and explosion-proof performance, reduces explosion leakage points, and enhances the solidity and explosion-proof effect of the through-head connection.
Smart Images
Figure CN222483983U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of explosion-proof equipment, in particular to a flameproof wire passing structure of an explosion-proof distribution box. Background Art
[0002] Explosion-proof distribution box is a kind of distribution box with explosion-proof performance, mainly including explosion-proof lighting distribution box, explosion-proof power distribution box, explosion-proof and anti-corrosion distribution box, etc., which are suitable for power distribution in flammable and explosive places such as petrochemical equipment, oil platforms, chemical industry, pharmaceuticals, coal, smelting, shipbuilding, military industry, textiles, etc. Existing explosion-proof distribution boxes are generally composed of multiple distribution modules spliced together, and adjacent distribution modules are respectively provided with wire ports, and explosion-proof wire passing structures are provided between adjacent distribution modules. On the basis of meeting the explosion-proof requirements, the wire ports are connected and the adjacent distribution modules are fixed at the same time.
[0003] The existing explosion-proof wire-passing structure includes a male head and a female head respectively installed on the outer side of adjacent distribution modules, and the male head and the female head are respectively coaxially provided with wire holes connecting the wire-passing ports of adjacent distribution modules, and the male head and the distribution module, the female head and the distribution module, and the male head and the female head are fixed by bolts. The explosion-proof wire-passing structure of the above structure has the following disadvantages: ① The head has two male and female models and the appearance is not much different, resulting in two identical heads being installed between the two distribution modules during the assembly process, and thus cannot be installed. Accordingly, the two types of heads require two sets of corresponding equipment for processing, which greatly increases the processing cost and reduces the processing efficiency; ② In addition to the wire-passing port, the distribution module also requires multiple through holes for bolts (bolts for fixing the male head and the distribution module, bolts for fixing the female head and the distribution module, and bolts for fixing the male head and the female head) to pass through. The increase in the number of openings will increase the explosion leakage points, resulting in a greatly increased difficulty in meeting the explosion-proof requirements. Summary of the invention
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a flameproof wire-passing structure for an explosion-proof distribution box which reduces processing costs, improves processing efficiency, has good explosion-proof performance, and improves assembly convenience.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: comprising two power distribution modules, the two power distribution modules are relatively provided with wire passing openings, characterized in that: also comprising two through heads, the two through heads are respectively fixed to the two power distribution modules, each of the through heads is coaxially penetrated with the wire passing opening and is provided with a wire passing hole, the through head comprises a first part located at the outside of the power distribution module and abutting against the other through head and a second part extending into the power distribution module through the wire passing opening, the side wall of the power distribution module is provided with a mounting hole at the wire passing opening, the outer periphery of the second part is threadedly matched with the mounting hole to form a flameproof thread, the wire passing hole includes a large diameter part and a small diameter part in sequence along the direction from the second part to the first part, the connection between the large diameter part and the small diameter part forms an installation step, each of the large diameter parts is provided with a connecting ring that is limitedly matched with the installing step, a plurality of screws are passed between the two connecting rings, and nuts that are limitedly matched with each connecting ring are respectively provided at both ends of the screw.
[0006] By adopting the above technical solution, during assembly, the second parts of the two through-heads are first screwed into the mounting holes of the two distribution modules from the outside of the distribution modules, and then the two connecting rings are respectively placed in the large diameter parts of the two wire holes, and then the screw is passed through the two connecting rings and locked by nuts. During the locking process, the two through-heads gradually approach each other until the two wire holes form a channel connecting the two wire ports. The above structure has the following advantages: ① The two through-heads use the same specification, which not only avoids the possibility of wrong installation, but also does not require two sets of equipment for production, greatly reducing processing costs and increasing processing efficiency; ② Changing the traditional method of using bolts to connect the through-heads and the distribution modules A fixed fixing method is used, in which the through-head is directly screwed into the distribution module, and fixed fit can be achieved through threads. Firstly, due to the large size of the through-head, it can be directly rotated by hand. Compared with small-volume parts such as bolts, which need to be screwed in with tools in the limited space of the distribution module, this structure is easier to assemble. Secondly, the distribution module does not need to be processed with through holes for the bolts to pass through. Each distribution module only retains one wire passing port, which greatly reduces the number of openings and reduces explosion leakage points, thereby improving explosion-proof performance. Finally, while fixing, a flameproof thread for explosion-proof is formed on the outer periphery of the through-head, eliminating the inconvenience caused by the need to inject glue to form an explosion-proof structure after the bolts are fixed.
[0007] The utility model is further configured as follows: a sealing groove is circumferentially arranged on the end surface of the first part facing the other first part, and the sealing groove is provided with a sealing ring compressed between the two first parts.
[0008] By adopting the above technical solution, a sealing ring and a sealing groove are added to the outer end face of the first part. During the tightening process of the nut and the screw, the two first parts gradually approach each other to press the sealing ring, thereby achieving sealing and explosion-proofing at the connection between the two through heads.
[0009] The utility model is further configured as follows: the wire passing hole is filled with sealant, a rubber partition plate is sandwiched between one of the connecting rings and the installation step to block the sealant during injection, and the rubber partition plate is provided with a plurality of through holes for screws or wires to pass through.
[0010] By adopting the above technical solution, sealant is filled in the wire hole to form an explosion-proof barrier in the wire hole, so that an explosion in one distribution module will not cause the explosion of another distribution module, thereby improving the explosion-proof performance. In combination with the rubber isolation plate, the sealant can be prevented from leaking into the distribution module during the injection process.
[0011] The utility model is further configured as follows: the connecting ring comprises an annular main body and raised portions equidistantly arranged on the inner circumference of the annular main body along the circumferential direction, the raised portions correspond one to one with the screw rods, the connecting ring is provided with connecting holes for the screw rods to pass through, part of the connecting hole is located on the raised portion, and the other part is located on the annular main body.
[0012] By adopting the above technical solution, a protrusion for enlarging the diameter of the connecting hole is provided on the inner circumference of the annular body, so that the diameter of the screw is increased, the fixing reliability is improved, and the inner circumference has a larger passing area, making threading more convenient.
[0013] The utility model is further configured as follows: the outer diameter of the first part is greater than the outer diameter of the second part, and the outer periphery of the connection between the first part and the second part forms a limiting step that abuts against the outer side surface of the distribution module.
[0014] By adopting the above technical solution, the outer diameters of the first part and the second part are reasonably adjusted so that the outer diameter of the first part is larger than that of the second part, forming a limiting step that abuts against the outer side of the distribution module, so that the fixation is more reliable after the through head is screwed into place. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;
[0016] Figure 2 It is an exploded view of a specific implementation method of the utility model;
[0017] Figure 3 It is a partial cross-sectional view of a specific implementation method of the utility model;
[0018] Figure 4 A three-dimensional diagram of the connecting ring. DETAILED DESCRIPTION
[0019] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0021] like Figure 1 — Figure 3As shown, the utility model discloses an explosion-proof wire-passing structure of an explosion-proof distribution box, including two distribution modules 1. In order to better express the structure in the attached drawings, the shell of the distribution module 1 is used to represent the distribution module 1. The two distribution modules 1 are relatively provided with wire-passing openings 11, and also include two through-heads 2, which are respectively fixed to the two distribution modules 1, and each through-head 2 is coaxially penetrated with the wire-passing opening 11 and is provided with a wire-passing hole 21. The through-head 2 includes a first part 22 located outside the distribution module 1 and abutting against the other through-head 2 and a second part 23 extending into the distribution module 1 through the wire-passing opening 11. The side wall of the distribution module 1 is provided with a mounting hole 12 at the wire-passing opening 11, and the second part 23 is provided with a mounting hole 12. The outer periphery of the second part 23 is threadedly matched with the mounting hole 12 to form a flameproof thread. The wire hole 21 includes a large diameter part 211 and a small diameter part 212 in sequence along the direction of the second part 23 to the first part 22. The large diameter part 211 and the small diameter part 212 form a mounting step 213 at the connection. A connecting ring 24 that is limited and matched with the mounting step 213 is arranged in each large diameter part 211. A plurality of screws 241 are inserted between the two connecting rings 24. Nuts 242 that are limited and matched with each connecting ring 24 are respectively arranged at both ends of the screw 241. A gasket can be added between the nut 242 and the connecting ring 24 to improve the fixing reliability. When assembling, first put the second parts of the two through heads 2 23 are respectively screwed into the mounting holes 12 of the two distribution modules 1 from the outside of the distribution module 1, and then the two connecting rings 24 are respectively placed in the large diameter parts 211 of the two wire holes 21, and then the screw 241 passes through the two connecting rings 24 and is locked by the nut 242. During the locking process, the two through heads 2 gradually approach each other until the two wire holes 21 form a channel connecting the two wire ports 11. The above structure has the following advantages: ① The two through heads 2 use the same specification, which not only avoids the possibility of wrong installation, but also does not require two sets of equipment for production, greatly reducing the processing cost and increasing the processing efficiency; ② Changing the traditional method of fixing the through head and the distribution module 1 with bolts A certain fixing method is used, and the through head 2 is directly screwed into the distribution module 1, and fixed fit can be achieved through threads. Firstly, due to the large size of the through head 2, it can be directly rotated by hand. Compared with small-volume parts such as bolts, it is necessary to use tools to screw it in within the limited space of the distribution module 1. This structure is easier to assemble. Secondly, the distribution module 1 does not need to be processed with through holes for the bolts to pass through. Each distribution module only retains one wire opening 11, which greatly reduces the number of openings and reduces explosion leakage points, thereby improving the explosion-proof performance. Finally, while fixing, a flameproof thread for explosion-proof is formed on the outer periphery of the through head 2, eliminating the inconvenience caused by the need to inject glue to form an explosion-proof structure after the bolts are fixed.
[0022] A sealing groove 221 is circumferentially provided on the end face of the first part 22 facing the other first part 22, and the sealing groove 221 is provided with a sealing ring 222 compressed between the two first parts 22. A sealing ring 222 and a sealing groove 221 are additionally provided on the outer end face of the first part 22. During the tightening process of the nut 242 and the screw rod 241, the two first parts 22 gradually approach to press the sealing ring 222, thereby achieving sealing and explosion-proofing at the connection of the two through heads 2.
[0023] The wire hole 21 is filled with sealant 214, and a rubber isolation plate 26 is sandwiched between one of the connecting rings 24 and the installation step 213 to block the sealant 214 during injection. The rubber isolation plate 26 is provided with a plurality of through holes 261 for the screw 241 or the wire to pass through. The sealant 214 is filled in the wire hole 21 to form an explosion-proof barrier in the wire hole 21, so that an explosion in one of the distribution modules 1 will not cause the explosion of another distribution module 1, thereby improving the explosion-proof performance. In conjunction with the rubber isolation plate 26, the sealant 214 can be prevented from leaking into the distribution module 1 during the injection process.
[0024] The outer diameter of the first part 22 is larger than that of the second part 23, and a limiting step 25 is formed at the periphery of the connection between the first part 22 and the second part 23, which abuts against the outer side surface of the distribution module 1. The outer diameters of the first part 22 and the second part 23 are reasonably adjusted to make the outer diameter of the first part 22 larger than that of the second part 23, forming a limiting step 25 abutting against the outer side surface of the distribution module 1, so that the fixing is more reliable after the through head 2 is screwed into place.
[0025] like Figure 4 As shown, the connecting ring 24 includes an annular body 243 and protrusions 244 equidistantly arranged on the inner circumference of the annular body 243 along the circumferential direction. The protrusions 244 correspond to the screw rods 241 one by one. The connecting ring 24 is provided with a connecting hole 245 for the screw rod 241 to pass through. Part of the connecting hole 245 is located on the protrusion 244, and the other part is located on the annular body 243. The protrusion 244 for expanding the diameter of the connecting hole 245 is arranged on the inner circumference of the annular body 243, so that the diameter of the screw rod 241 is increased and the fixing reliability is improved. At the same time, the inner circumference has a larger passing area, which makes threading more convenient.
Claims
1. A flameproof wire-passing structure of an explosion-proof distribution box, comprising two distribution modules, wherein the two distribution modules are provided with wire-passing ports opposite to each other, and characterized in that: It also includes two through-heads, which are respectively fixed to two distribution modules, and each of the through-heads is coaxially connected with the wire-passing opening and is provided with a wire-passing hole. The through-head includes a first part located on the outside of the distribution module and abutting against the other through-head and a second part extending into the distribution module through the wire-passing opening. The side wall of the distribution module is provided with a mounting hole at the wire-passing opening, and the outer periphery of the second part cooperates with the thread of the mounting hole to form a flameproof thread. The wire-passing hole includes a large diameter part and a small diameter part in sequence along the direction from the second part to the first part, and an installation step is formed at the connection between the large diameter part and the small diameter part. A connecting ring that cooperates with the installation step is provided in each of the large diameter parts, and a plurality of screws are passed between the two connecting rings. Nuts that cooperate with each connecting ring are provided at both ends of the screws.
2. The explosion-proof wire-passing structure of the explosion-proof distribution box according to claim 1 is characterized in that: A sealing groove is circumferentially arranged on the end surface of the first part facing the other first part, and the sealing groove is provided with a sealing ring compressed between the two first parts.
3. The explosion-proof wire-passing structure of the explosion-proof distribution box according to claim 1 is characterized in that: The wire holes are filled with sealant, a rubber partition board is sandwiched between one of the connecting rings and the installation step to block the sealant during injection, and the rubber partition board is provided with a plurality of through holes for screws or wires to pass through.
4. The flameproof wire passing structure of the explosion-proof distribution box according to claim 1 is characterized in that: The connecting ring includes an annular body and raised portions equidistantly arranged on the inner circumference of the annular body along the circumferential direction. The raised portions correspond to the screw rods one by one. The connecting ring is provided with connecting holes for the screw rods to pass through. Part of the connecting hole is located on the raised portion, and the other part is located on the annular body.
5. The explosion-proof wire-passing structure of the explosion-proof distribution box according to claim 1 is characterized in that: The outer diameter of the first part is greater than the outer diameter of the second part, and the outer periphery of the connection between the first part and the second part forms a limiting step that abuts against the outer side surface of the distribution module.