Explosion-proof junction box
Through the interlaced multi-layer sealing structure and spring support, the problem of poor sealing performance of explosion-proof junction boxes is solved, achieving a more stable sealing effect and wider adaptability.
Patent Information
- Application Number
- CN202422383996.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing explosion-proof junction boxes have shortcomings in the sealing design, and the sealing structure is single, which leads to easy entry of external water vapor or dust, increasing the risk of explosion, and the sealing ring loses its sealing effect due to vibration or temperature difference, so the safety cannot be guaranteed.
Using a multi-layer sealing structure with interlaced design, the first and second inflatable rubber rings and convex rings are used to form multiple independent sealing points, and additional pressure support is provided through springs to ensure stable sealing performance.
Improves sealing effect, reduces the risk of seal failure caused by vibration or temperature difference, enhances the adaptability of the junction box, and maintains sealing performance in a wider environment.
Smart Images
Figure CN223156650U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical engineering, and specifically relates to an explosion-proof junction box. Background Art
[0002] As a box for line transition connection, line jump connection, and cross connection, a junction box is equipped with terminal blocks inside and is a commonly used device in some dangerous places. In practical applications, for example, the safety protection of the junction box supporting an explosion-proof electric heater has high requirements, and it is required to have good explosion-proof, waterproof, resistance to harsh environments, and convenience of use at the same time.
[0003] The existing explosion-proof junction boxes are mainly composed of parts such as a housing, a cover plate, and internal electrical components. Its working principle is based on explosion-proof isolation technology. Through a specially designed housing, the internal electrical components are isolated from the external environment to prevent electrical sparks or high temperatures from causing an explosion, ensuring the safe operation of the equipment in an explosive and flammable environment.
[0004] At present, the existing explosion-proof junction boxes have the following disadvantages: The existing explosion-proof junction boxes have deficiencies in the sealing design. Most of them use a simple single sealing ring for sealing, with a single sealing structure, resulting in poor sealing performance. This allows external water vapor or dust to easily enter the inside of the junction box, increasing the explosion risk. Moreover, the sealing ring will lose its original sealing effect due to expansion or contraction caused by external vibration or temperature difference, and the safety cannot be guaranteed. Therefore, an explosion-proof junction box is proposed to address the above problems. Summary of the Utility Model
[0005] In order to make up for the deficiencies of the existing explosion-proof junction boxes and solve the problems that the existing explosion-proof junction boxes have deficiencies in the sealing design, most of them use a simple single sealing ring for sealing, with a single sealing structure, resulting in poor sealing performance. This allows external water vapor or dust to easily enter the inside of the junction box, increasing the explosion risk. Moreover, the sealing ring will lose its original sealing effect due to expansion or contraction caused by external vibration or temperature difference, and the safety cannot be guaranteed, an explosion-proof junction box is proposed.
[0006] The technical solution adopted by the utility model to solve its technical problems is as follows: A kind of explosion-proof junction box described in the utility model includes a housing. One side of the housing is assembled with a cover plate. One side of the housing is provided with a first fixing plate, and one side of the cover plate is provided with a second fixing plate corresponding to the first fixing plate. One side of the first fixing plate is provided with a plurality of groups of first convex rings, and one side of the second fixing plate is provided with a plurality of groups of first concave rings corresponding to the first convex rings. A first inflatable rubber ring is arranged in the first concave ring. When the housing and the cover plate are assembled, the plurality of groups of first convex rings are inserted into the corresponding plurality of groups of first concave rings and squeeze the first inflatable rubber ring to form a plurality of groups of "sealing walls" for improving the sealing performance inside the housing.
[0007] Preferably, one side of the second fixing plate is provided with a plurality of second convex rings, one side of the first fixing plate is provided with a plurality of second concave rings corresponding to the second convex rings, a second inflatable rubber ring is arranged in the second concave rings. When the housing and the cover plate are assembled, the plurality of second convex rings are inserted into the corresponding second concave rings and extrude the second inflatable rubber rings to form a plurality of "sealing walls", further improving the sealing performance inside the housing.
[0008] Preferably, the positions of the first convex ring and the first concave ring are arranged in a staggered manner with the positions of the second convex ring and the second concave ring.
[0009] Preferably, rubber reinforcing ribs are arranged inside both the first inflatable rubber ring and the second inflatable rubber ring, and the rubber reinforcing ribs are distributed in a grid shape.
[0010] Preferably, a plurality of first grooves are formed in the inner wall of the second concave ring, a first spring is arranged in the first grooves, the other end of the first spring is connected to one side of the second inflatable rubber ring, a plurality of second grooves are formed in the inner wall of the first concave ring, a second spring is arranged in the second grooves, and the other end of the second spring is connected to one side of the first inflatable rubber ring.
[0011] Preferably, a plurality of assembly holes corresponding to the number of positions are formed on both the first fixing plate and the second fixing plate, and the assembly holes are used for inserting fixing bolts to assemble and fix the first fixing plate and the second fixing plate.
[0012] Advantages of the present utility model:
[0013] The present utility model provides an explosion-proof junction box. Through the cooperation of the sealing structure of the present utility model, the staggered design not only increases the connection stability, but also improves the sealing effect through multiple contact surfaces, forming a plurality of independent sealing points. These sealing points work together to form a series of strong sealing barriers, improving the sealing effect.
[0014] Through the cooperation of the first spring and the second spring, they respectively act on the second inflatable rubber ring and the first inflatable rubber ring, providing additional pressure support for them. This design helps to maintain the stable sealing performance of the inflatable rubber ring when the junction box is subjected to external pressure or vibration, reducing the risk of sealing failure caused by vibration or pressure change. And when the temperature difference is large, the elastic forces of the first spring and the second spring can compensate for this change, ensuring that the second inflatable rubber ring and the first inflatable rubber ring always closely fit on the sealing surface, maintaining the sealing performance, so that the explosion-proof junction box can adapt to a wider range of use environments and conditions. Description of the drawings
[0015] The accompanying drawings described herein are used to provide a further understanding of the present utility model and form a part of this application. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:
[0016] Figure 1 is the overall structural perspective view;
[0017] Figure 2 is the partial top view cross-sectional view when the first fixing plate and the second fixing plate are assembled;
[0018] Figure 3 is Figure 2 the enlarged structural view at A in
[0019] Figure 4 is the partial top view cross-sectional view when the first fixing plate and the second fixing plate are disassembled;
[0020] Figure 5 is Figure 4 the enlarged structural view at B in
[0021] Legend:
[0022] 1. Housing; 01. First fixing plate; 2. Cover plate; 02. Second fixing plate; 3. First convex ring; 4. First concave ring; 5. First inflatable rubber ring; 6. Second convex ring; 7. Second concave ring; 8. Second inflatable rubber ring; 9. Rubber reinforcing rib; 10. First groove; 11. First spring; 12. Second groove; 13. Second spring; 14. Assembly hole. Detailed implementation manners
[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0024] The following gives specific embodiments.
[0025] Please refer to Figures 1 - 5, an explosion-proof junction box of the present utility model includes a housing 1, a cover plate 2 is assembled on one side of the housing 1, a first fixing plate 01 is provided on one side of the housing 1, and a second fixing plate 02 corresponding to the first fixing plate 01 is provided on one side of the cover plate 2. A plurality of first convex rings 3 are provided on one side of the first fixing plate 01, and a plurality of first concave rings 4 corresponding to the first convex rings 3 are provided on one side of the second fixing plate 02. A first inflatable rubber ring 5 is arranged in the first concave ring 4. When the housing 1 and the cover plate 2 are assembled, the plurality of first convex rings 3 are inserted into the corresponding first concave rings 4 and squeeze the first inflatable rubber ring 5 to form a plurality of "sealing walls" for improving the sealing performance inside the housing 1;
[0026] A plurality of second convex rings 6 are provided on one side of the second fixing plate 02, and a plurality of second concave rings 7 corresponding to the second convex rings 6 are provided on one side of the first fixing plate 01. A second inflatable rubber ring 8 is arranged in the second concave ring 7. When the housing 1 and the cover plate 2 are assembled, the plurality of second convex rings 6 are inserted into the corresponding second concave rings 7 and squeeze the second inflatable rubber ring 8 to form a plurality of "sealing walls", further improving the sealing performance inside the housing 1. The positions of the first convex ring 3 and the first concave ring 4 are arranged in an interleaved manner with the positions of the second convex ring 6 and the second concave ring 7; A plurality of assembly holes 14 corresponding in position and quantity are formed on both the first fixing plate 01 and the second fixing plate 02. The assembly holes 14 are used for inserting fixing bolts to assemble and fix the first fixing plate 01 and the second fixing plate 02. During operation, when assembling the housing 1 and the cover plate 2, the staff inserts a plurality of fixing bolts into the corresponding assembly holes 14 of the housing 1 and the cover plate 2. At this time, the plurality of first convex rings 3 are inserted into the corresponding first concave rings 4 and squeeze the first inflatable rubber ring 5 in the first concave ring 4. The first inflatable rubber ring 5 is squeezed and deformed, filling the gap between the first fixing plate 01 and the second fixing plate 02 and filling any tiny gaps, thereby providing effective sealing. The contact surface of each first convex ring 3 and the first concave ring 4 forms a "labyrinth" - type obstacle, and the sealing performance is more guaranteed. At the same time, the second concave ring 7 and the second inflatable rubber ring 8 also form a plurality of seals in the same way as the first convex ring 3 and the first concave ring 4 above, which will not be elaborated here. And because the positions of the first convex ring 3 and the first concave ring 4 are arranged in an interleaved manner with the positions of the second convex ring 6 and the second concave ring 7, the interleaved design not only increases the connection stability but also improves the sealing effect through multiple contact surfaces. The cooperation of each group of the first convex ring 3 and the first concave ring 4 and the second convex ring 6 and the second concave ring 7 forms an independent sealing point. These sealing points act together to form a series of strong sealing barriers. When the cover plate 2 is fixed on the housing 1, the interleaved design helps to evenly distribute the pressure on the entire contact surface. This helps to maintain the compressed state of the first inflatable rubber ring 5 and the second inflatable rubber ring 8 and prevent the formation of too high a pressure gradient in a local area, which may lead to a problem of decreased sealing performance.
[0027] Further, rubber reinforcing ribs 9 are arranged inside both the first inflatable rubber ring 5 and the second inflatable rubber ring 8. The rubber reinforcing ribs 9 are distributed in a grid pattern. During operation, since the first inflatable rubber ring 5 and the second inflatable rubber ring 8 may be affected by factors such as wear and aging during long-term use, their sealing performance will gradually decline. The internally arranged rubber reinforcing ribs 9 can slow down this aging process, extend the service life, and thus maintain the stable and reliable sealing performance of the junction box. The rubber reinforcing ribs 9 distributed in a grid pattern not only enhance the strength and durability of the first inflatable rubber ring 5 and the second inflatable rubber ring 8, but also have a positive impact on their physical properties such as elasticity. The rubber reinforcing ribs 9 increase the resilience of the first inflatable rubber ring 5 and the second inflatable rubber ring 8, making the sealing surface fit more tightly.
[0028] Further, a plurality of groups of first grooves 10 are formed in the inner wall of the second concave ring 7. A first spring 11 is arranged in the first grooves 10, and the other end of the first spring 11 is connected to one side of the second inflatable rubber ring 8. A plurality of groups of second grooves 12 are formed in the inner wall of the first concave ring 4. A second spring 13 is arranged in the second grooves 12, and the other end of the second spring 13 is connected to one side of the first inflatable rubber ring 5. During operation, during the sealing process, the first spring 11 and the second spring 13 act on the second inflatable rubber ring 8 and the first inflatable rubber ring 5 respectively, providing additional pressure support for them. This design helps to maintain the stable sealing performance of the inflatable rubber ring when the junction box is subjected to external pressure or vibration, reducing the risk of sealing failure caused by vibration or pressure changes. Moreover, the first spring 11 and the second spring 13 enable the second inflatable rubber ring 8 and the first inflatable rubber ring 5 to make adaptive adjustments to a certain extent. When conditions such as pressure and temperature inside or outside the junction box change, the second inflatable rubber ring 8 and the first inflatable rubber ring 5 may lose their original sealing effect due to expansion or contraction. At this time, the elastic forces of the first spring 11 and the second spring 13 can compensate for this change, ensuring that the inflatable rubber ring always fits tightly on the sealing surface, maintaining the sealing performance, and enabling the explosion-proof junction box to adapt to a wider range of use environments and conditions, whether it is high temperature, low temperature, humidity or other harsh environments.
[0029] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0030] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements fall within the scope of the present utility model claimed.
Claims
1. An explosion-proof junction box, comprising a housing (1), and a cover plate (2) is assembled on one side of the housing (1), characterized in that: On one side of the housing (1), a first fixing plate (01) is provided. On one side of the cover plate (2), a second fixing plate (02) corresponding to the first fixing plate (01) is provided. On one side of the first fixing plate (01), a plurality of first convex rings (3) are provided. On one side of the second fixing plate (02), a plurality of first concave rings (4) corresponding to the first convex rings (3) are provided. A first inflatable rubber ring (5) is arranged in the first concave ring (4). When the housing (1) and the cover plate (2) are assembled, the plurality of first convex rings (3) are inserted into the corresponding plurality of first concave rings (4) and extrude the first inflatable rubber ring (5) to form a plurality of "sealing walls" for improving the sealing performance inside the housing (1).
2. An explosion-proof junction box according to claim 1, characterized in that: On one side of the second fixing plate (02), a plurality of second convex rings (6) are provided. On one side of the first fixing plate (01), a plurality of second concave rings (7) corresponding to the second convex rings (6) are provided. A second inflatable rubber ring (8) is arranged in the second concave ring (7). When the housing (1) and the cover plate (2) are assembled, the plurality of second convex rings (6) are inserted into the corresponding plurality of second concave rings (7) and extrude the second inflatable rubber ring (8) to form a plurality of "sealing walls" for further improving the sealing performance inside the housing (1).
3. An explosion-proof junction box according to claim 1, characterized in that: The positions of the first convex ring (3) and the first concave ring (4) are arranged in an alternating manner with the positions of the second convex ring (6) and the second concave ring (7).
4. An explosion-proof junction box according to claim 1, characterized in that: Rubber reinforcing ribs (9) are arranged inside both the first inflatable rubber ring (5) and the second inflatable rubber ring (8), and the rubber reinforcing ribs (9) are distributed in a grid pattern.
5. An explosion-proof junction box according to claim 2, characterized in that: A plurality of first grooves (10) are formed in the inner wall of the second concave ring (7). A first spring (11) is arranged in the first groove (10), and the other end of the first spring (11) is connected to one side of the second inflatable rubber ring (8). A plurality of second grooves (12) are formed in the inner wall of the first concave ring (4). A second spring (13) is arranged in the second groove (12), and the other end of the second spring (13) is connected to one side of the first inflatable rubber ring (5).
6. An explosion-proof junction box according to claim 1, characterized in that: A plurality of assembly holes (14) corresponding in position and quantity are formed in both the first fixing plate (01) and the second fixing plate (02). The assembly holes (14) are used for inserting fixing bolts to assemble and fix the first fixing plate (01) and the second fixing plate (02).