Explosion-proof junction box

Abstract

This utility model provides an explosion-proof junction box. The explosion-proof junction box includes a housing and a cover. The housing has an internal cavity with an upper opening, and the cover has an internal cavity with a lower opening. The lower port of the housing is fastened to the upper port of the cover. The housing has a reinforcing portion protruding from its bottom. The outer side of the housing has a protruding connecting portion one, extending from the upper end of the housing to the lower end, and located at one end of the reinforcing portion. A fastener can be installed at the connecting portion one, allowing the cover to be securely connected to the housing after it is fastened to the housing. A second connecting portion protruding from the bottom of the housing has another fastener that can be installed at the second connecting portion, located at the other end of the reinforcing portion. This fastener secures the housing to a corresponding mounting bracket. This explosion-proof junction box has high stability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically to an explosion-proof junction box. Background Technology

[0002] Explosion-proof junction boxes are electrical connection protection devices specifically designed for flammable and explosive hazardous locations. Their main function is to achieve safe connection, branching and transition of cables, while effectively preventing the combustion and explosion of external explosive gases, dust or vapor environments caused by possible internal electric sparks, arcs or high temperatures.

[0003] Therefore, explosion-proof junction boxes require a certain level of strength. If an explosion-proof junction box is damaged, the electrical sparks, arcs, or high temperatures generated at the junction box may ignite external explosive gases, dust, or vapors, thus creating a serious safety hazard.

[0004] Therefore, the casing of an explosion-proof junction box needs to have high strength while using the same amount of material. However, achieving high strength also results in a relatively high cost for the casing.

[0005] Since the box consists of a shell and a cover, two connection points need to be considered in the box design:

[0006] Firstly, the connection between the shell and the cover;

[0007] Secondly, the connection between the housing and the corresponding mounting bracket.

[0008] In existing explosion-proof junction boxes, the structures of the two connections mentioned above are set independently on the housing, which inevitably leads to the connection structures occupying a certain amount of space on the housing.

[0009] Meanwhile, the bottom of the housing contacts the mounting bracket surface, and this surface contact connection is a theoretical design feature. In actual connection, the non-high-precision bottom of the housing may not maintain surface contact with the corresponding bracket. In other words, a gap will appear between the housing and the bracket. This gap will result in insufficient installation stability of the housing, leading to the housing easily detaching from the bracket or becoming loose. Utility Model Content

[0010] The purpose of this invention is to address the aforementioned problems in existing technologies by providing an explosion-proof junction box that is compact in structure and highly stable after installation.

[0011] To achieve the above objectives, this utility model can be implemented through the following technical solutions:

[0012] An explosion-proof junction box includes a housing and a cover. The housing has an internal cavity and an upper opening, and the cover has an internal cavity and a lower opening. The lower port of the housing is fastened to the upper port of the cover. The housing is characterized by having a reinforcing portion protruding from its bottom.

[0013] The outer side of the housing has a protruding connecting portion, which extends from the upper end of the housing to the lower end and is located at one end of the reinforcing portion. A fastener can be installed in the connecting portion, and when the cover is fastened to the housing, the cover can be securely connected to the housing through the fastener.

[0014] The outer side of the housing has a second connecting part protruding from the bottom of the housing. Another fastener can be installed at the second connecting part. The second connecting part is located at the other end of the reinforcement part. The housing can be fixed to the corresponding mounting bracket by the fastener.

[0015] In the aforementioned explosion-proof junction box, the reinforcing part, connecting part one, connecting part two, and the housing are an integral structure.

[0016] In the aforementioned explosion-proof junction box, one of the connection parts has a connecting hole that runs from top to bottom, and a corresponding fastener is inserted through the connecting hole.

[0017] In the aforementioned explosion-proof junction box, the second connection part has a through connection hole, and a corresponding fastener is inserted through the second connection hole.

[0018] In the aforementioned explosion-proof junction box, the upper port of the housing has a protruding fastening edge, and the lower port of the cover has a recessed fastening groove that matches the fastening edge. When the cover is fastened to the housing, the fastening edge is embedded in the fastening groove.

[0019] In the aforementioned explosion-proof junction box, the snap-fit ​​groove has a sealing ring, which is pressed tightly between the housing and the cover.

[0020] In the aforementioned explosion-proof junction box, the cover has a through connection hole three, and when the housing and the cover are fastened together, the connection hole one and the connection hole three are directly opposite each other.

[0021] In the aforementioned explosion-proof junction box, the edge of the cover has a recessed connector, and the aforementioned three connector holes are located at the connector.

[0022] In the aforementioned explosion-proof junction box, the housing is square, with two reinforcing parts on one side of the housing, located at both ends of the housing, and two additional reinforcing parts on the other side of the housing, located at both ends of the housing.

[0023] In the aforementioned explosion-proof junction box, the height dimensions of the four reinforcing parts are all the same.

[0024] Compared with existing technologies, the reinforcing section in this explosion-proof junction box not only enhances the strength of the bottom of the housing, but also provides ample space for the installation of connection part one and connection part two. Therefore, the entire explosion-proof junction box possesses high strength.

[0025] Given that connecting part one is used to connect the housing to the cover, and connecting part two is used to connect the housing to the corresponding mounting bracket, the two connection positions are centrally located, which improves the compactness of the structure to a certain extent.

[0026] The housing contacts the corresponding bracket through four reinforcing parts. Since all four reinforcing parts are in close contact with the corresponding bracket, the housing is stable after installation and is not easy to loosen or fall off. Attached Figure Description

[0027] Figure 1 This is a top-view schematic diagram of the three-dimensional structure of the explosion-proof junction box.

[0028] Figure 2 This is a three-dimensional structural diagram of the style and orientation of this explosion-proof junction box.

[0029] Figure 3 This is a cross-sectional structural diagram of the explosion-proof junction box.

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the shell.

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the shell cover.

[0032] Figure 6 yes Figure 3 A schematic diagram of the local structure at point A in the middle.

[0033] Figure 7 yes Figure 5 A schematic diagram of the local structure at point B.

[0034] In the picture:

[0035] 1. Housing; 2. Housing cover; 21. Connecting hole three; 22. Connecting seat; 3. Reinforcing part; 4. Connecting part one; 41. Connecting hole one; 5. Connecting part two; 51. Connecting hole two; 6. Fastening edge; 7. Fastening groove; 8. Sealing ring. Detailed Implementation

[0036] The following are specific embodiments of the present invention, and the technical solution of the present invention will be further described in conjunction with the accompanying drawings.

[0037] like Figure 1-7As shown, this explosion-proof junction box includes a housing 1 and a cover 2. The housing 1 has an internal cavity with an opening at the top, and the cover 2 has an internal cavity with an opening at the bottom. The lower port of the housing 1 is fastened to the upper port of the cover 2. The housing 1 has a reinforcing part 3 protruding from its bottom.

[0038] The outer side of the housing 1 has a protruding connecting portion 4, which extends from the upper end of the housing 1 to the lower end of the housing 1 and is located at one end of the reinforcing portion 3. A fastener can be installed at the connecting portion 4. When the cover 2 is fastened to the housing 1, the cover 2 and the housing 1 can be securely connected by the fastener.

[0039] The outer side of the housing 1 has a connecting part 2 5 protruding from the bottom of the housing 1. Another fastener can be installed at the connecting part 2 5. The connecting part 2 5 is located at the other end of the reinforcing part 3. The housing 1 can be fixed to the corresponding mounting bracket by the fastener.

[0040] Reinforcement part 3 has two functions:

[0041] Firstly, because the reinforcing part 3 protrudes from the bottom of the housing 1, when the housing 1 is connected to the corresponding bracket, the reinforcing part 3 can prevent the housing 1 from directly contacting the bracket. This improves the connection stability between the housing 1 and the corresponding bracket.

[0042] Secondly, it provides sufficient space for the installation of connection part 4 and connection part 5, ensuring that the entire junction box has a high degree of compactness.

[0043] Of course, since both the first connecting part 4 and the second connecting part 5 are located at the high-strength reinforcing part 3, this will not reduce the strength of the shell 1.

[0044] The reinforcing part 3, connecting part one 4, connecting part two 5, and the shell 1 are an integral structure.

[0045] This effectively improves the structural compactness of shell 1.

[0046] The connecting part 4 has a connecting hole 41 that runs from top to bottom, and a corresponding fastener is inserted through the connecting hole 41.

[0047] The connection hole 41 contains a fastener, and the two ends of the fastener are respectively connected to the housing 1 and the cover 2, which can ensure a stable connection between the housing 1 and the cover 2.

[0048] The connecting part 2 5 has a through connecting hole 2 51, and a corresponding fastener is inserted through the connecting hole 2 51.

[0049] There is another fastener at the second connection hole 51, which can stably fix the housing 51 to the corresponding connection bracket.

[0050] The upper port of the housing 1 has a protruding fastening edge 6, and the lower port of the cover 2 has a recessed fastening groove 7 that matches the fastening edge 6. When the cover 2 is fastened to the housing 1, the fastening edge 6 is embedded in the fastening groove 7.

[0051] After the snap-fit ​​edge 6 is embedded in the snap-fit ​​groove 7, the cover 2 can be stably snapped onto the housing 1, and a sealed cavity is formed between the two.

[0052] Since the wiring parts are all located in a sealed cavity, it effectively prevents the combustion and explosion of external explosive gases, dust or vapor environments caused by electrical sparks, arcs or high temperatures that may be generated inside the junction box.

[0053] The fastening groove 7 has a sealing ring 8, which is pressed tightly between the housing 1 and the cover 2.

[0054] The sealing ring 8 further improves the sealing performance after the housing 1 and the cover 2 are connected.

[0055] The cover 2 has a through connection hole 3 21. When the housing 1 and the cover 2 are fastened together, the connection hole 1 41 and the connection hole 3 21 are directly opposite each other.

[0056] The two ends of the fastener are connected to connection hole 41 and connection hole 21 respectively, thereby ensuring a stable connection between the cover 2 and the housing 1. In this embodiment, the two ends of the fastener are connected to the corresponding connection hole 41 and connection hole 21 respectively.

[0057] The shell cover 2 has a recessed connecting seat 22 at its edge, and the aforementioned connecting hole 3 21 is located at the connecting seat 22.

[0058] The connector 22 can avoid the fastener, ensuring that the fastener can be stably connected to the cover 2.

[0059] The housing 1 is square in shape. One side of the housing 1 has two reinforcing parts 3, which are located at both ends of the housing 1. The other side of the housing 1 has two more reinforcing parts 3, which are located at both ends of the housing 1.

[0060] The height dimensions of the four reinforcing parts 3 are all the same.

[0061] All four reinforcing parts 3 protrude from the bottom of the housing 1, and the height of the four reinforcing parts 3 is the same. Therefore, when the housing 1 is connected to the corresponding bracket, the four reinforcing parts 3 are in contact with the bracket, which ensures that the housing 1 is stably connected to the corresponding bracket.

[0062] The reinforcing section in this explosion-proof junction box not only strengthens the bottom of the housing but also provides ample space for the installation of connection part one and connection part two. Therefore, the entire explosion-proof junction box possesses high strength.

[0063] Given that connecting part one is used to connect the housing to the cover, and connecting part two is used to connect the housing to the corresponding mounting bracket, the two connection positions are centrally located, which improves the compactness of the structure to a certain extent.

[0064] The housing contacts the corresponding bracket through four reinforcing parts. Since all four reinforcing parts are in close contact with the corresponding bracket, the housing is stable after installation and is not easy to loosen or fall off.

[0065] The above-described technical solution of this utility model addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. The parts not covered in this application's technical solution are the same as or can be implemented using existing technologies, and will not be described in detail here.

[0066] The technical solutions in the above embodiments have clearly and completely described the content of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. An explosion-proof terminal box comprising a housing and a cover, the housing having an empty cavity inside and an open upper portion, the cover having an empty cavity inside and an open lower portion, and the lower end of the housing being connected to the upper end of the cover by a snap-fit, characterized in that, The housing has a reinforcing portion protruding from its bottom. The outer side of the housing has a protruding connecting portion, which extends from the upper end of the housing to the lower end and is located at one end of the reinforcing portion. A fastener can be installed in the connecting portion, and when the cover is fastened to the housing, the cover can be securely connected to the housing through the fastener. The outer side of the housing has a second connecting part protruding from the bottom of the housing. Another fastener can be installed at the second connecting part. The second connecting part is located at the other end of the reinforcement part. The housing can be fixed to the corresponding mounting bracket by the fastener.

2. The explosion-proof junction box according to claim 1, characterized in that, The reinforcing part, connecting part one, connecting part two, and the shell are an integral structure.

3. The explosion-proof junction box according to claim 1, characterized in that, The connecting part has a connecting hole that runs from top to bottom, and a corresponding fastener is inserted through the connecting hole.

4. The explosion-proof junction box according to claim 1, characterized in that, The connecting part has a through connecting hole, and a corresponding fastener is inserted through the connecting hole.

5. The explosion-proof junction box according to claim 1, 2, 3, or 4, characterized in that, The upper port of the housing has a protruding fastening edge, and the lower port of the cover has a recessed fastening groove that matches the fastening edge. When the cover is fastened to the housing, the fastening edge is embedded in the fastening groove.

6. The explosion-proof junction box according to claim 5, characterized in that, The fastening groove has a sealing ring, which is pressed tightly between the housing and the cover.

7. The explosion-proof junction box according to claim 3, characterized in that, The shell cover has a through connection hole three. When the shell and the shell cover are fastened together, the connection hole one and the connection hole three are directly opposite each other.

8. The explosion-proof junction box according to claim 7, characterized in that, The shell cover has a recessed connecting seat at its edge, and the three connecting holes are located at the connecting seat.

9. The explosion-proof junction box according to claim 1, 2, 3, or 4, characterized in that, The shell is square, with two reinforcing parts on one side, located at both ends of the shell, and two additional reinforcing parts on the other side, also located at both ends of the shell.

10. The explosion-proof junction box according to any one of claims 1, 2, 3, or 4, characterized in that, All four reinforcement sections have the same height.

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