Explosion-proof charging socket structure

Abstract

This utility model discloses an explosion-proof charging socket structure, including a housing. A connecting strip is installed on the bottom inner side of the housing, and multiple second contact plates are installed on the connecting strip, with the second contact plates connected to external electrical wires. A cover is installed at the front of the housing, and a plug shell is slidably connected to the middle of the cover. Multiple first contact plates are installed on one side of the plug shell, and the first contact plates are adapted to the second contact plates. Through an elastic membrane tightly fitting the plug shell and connecting strip, combined with the explosion-proof surface design of the housing and cover, it can effectively prevent electrical sparks that may be generated during insertion and removal from contacting the external flammable and explosive environment, significantly reducing the risk of combustion and explosion, and meeting the safety requirements of hazardous environments. The limiting mechanism, through the cooperation of a push plate, spring, limiting plug plate, and limiting slot, can stably fix the plug shell in the working and non-working states, preventing contact separation due to external force during charging.

Description

Technical Field

[0001] This utility model relates to the field of socket technology, specifically to an explosion-proof charging socket structure. Background Technology

[0002] In hazardous environments containing flammable and explosive gases (such as methane and propane) or dust, traditional charging sockets, due to structural design flaws, often have their conductive contact components (such as metal prongs) directly exposed to the air, relying solely on a simple outer casing for protection. When the plug is inserted or removed, the current breaking down the air can easily generate an electric spark. If the flammable and explosive substances present in such environments come into contact with this spark, it can easily trigger combustion, explosions, and other serious safety accidents, severely threatening personnel lives and equipment safety.

[0003] Therefore, an explosion-proof charging socket structure is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof charging socket structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof charging socket structure, including a housing, a connecting bar installed on the bottom inner side of the housing, and a plurality of second contact plates installed on the connecting bar, the second contact plates being connected to external wires;

[0006] A cover is installed at the front of the outer shell, and an insert shell is slidably connected to the middle of the cover. A plurality of first contact plates are installed on one side of the insert shell, and the first contact plates are adapted to the second contact plates.

[0007] An elastic membrane is installed between the insert and the connecting bar;

[0008] Boxes are installed on both sides of the insert shell, and a limiting mechanism that cooperates with the cover to restrict the position of the insert shell is installed inside the box.

[0009] Preferably, the limiting mechanism includes a support plate and multiple rods;

[0010] Multiple rods are evenly installed on the inner bottom of the box, and the support plate is installed on the inner middle of the box. Multiple sliding grooves are provided on the support plate, and a push plate is provided on the support plate. The bottom of the push plate passes through the sliding groove and is slidably connected to the outside of the rod.

[0011] Preferably, a spring is installed on the outer side of the rod.

[0012] Preferably, an inner plate is installed on the inner side of the cover, and two limiting slots are symmetrically opened on both sides of the inner plate.

[0013] Preferably, a limiting insert is installed on one side of the push plate, and one side of the limiting insert penetrates the box body and is adapted to the limiting slot.

[0014] Preferably, the connecting bar has multiple limiting holes evenly distributed, and the insert shell has multiple limiting posts evenly distributed, with the multiple limiting posts matching the multiple limiting holes.

[0015] Compared with existing technologies, the advantages of this utility model are: by tightly fitting the insert shell and connecting strip with an elastic membrane, and in conjunction with the explosion-proof surface design of the outer shell and cover, it can effectively block the contact between electrical sparks that may be generated during insertion and removal and the external flammable and explosive environment, significantly reducing the risk of combustion and explosion, and meeting the safety requirements of hazardous environments. The limiting mechanism, through the cooperation of the push plate, spring, limiting insert plate and limiting slot, can stably fix the insert shell in the working and non-working states, avoiding contact separation caused by external force during charging. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the insert shell of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the box body of this utility model;

[0019] Figure 4 This is an exploded view of the structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the cover of this utility model;

[0021] Figure 6 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 7 This utility model Figure 6 Enlarged structural diagram of area A in the middle.

[0023] In the diagram: 1. Outer shell; 2. Cover; 3. Box; 4. Insert shell; 5. First contact plate; 6. Push plate; 7. Rod; 8. Spring; 9. Limiting insert plate; 10. Connecting bar; 11. Limiting hole; 12. Second contact plate; 13. Elastic membrane; 14. Limiting post; 15. Inner plate; 16. Limiting slot; 17. Support plate; 18. Slide groove. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0025] Please see Figure 1-7This utility model provides a technical solution: an explosion-proof charging socket structure, including a shell 1, a connecting strip 10 installed on the bottom inner side of the shell 1, a plurality of second contact plates 12 installed on the connecting strip 10, the second contact plates 12 being connected to external wires, the plurality of second contact plates 12 being positive, negative and ground respectively, and being connected to external power lines respectively, the connection points being sealed by a potting process to ensure compliance with explosion-proof standards.

[0026] The front of the outer shell 1 is fitted with a cover 2, and the middle of the cover 2 is slidably connected with an insert shell 4. The insert shell 4 can be connected to the cover 2 by means of a slider and a groove, which can initially restrict the position of the insert shell 4 so that it can only move within a certain range and prevent it from detaching from the cover 2.

[0027] Multiple first contact plates 5 are installed on one side of the housing 4. The first contact plates 5 are adapted to the second contact plates 12. The positions of the first contact plates 5 and the second contact plates 12 correspond to each other, and they are all made of conductive material. When the two contact plates are in contact, power can be transmitted.

[0028] An elastic membrane 13 is installed between the insert housing 4 and the connecting strip 10. The elastic membrane 13 is made of rubber and is tightly connected to the insert housing 4 and the connecting strip 10 on both sides to reduce the entry and exit of gas and at the same time prevent the electric spark from contacting the external environment.

[0029] Boxes 3 are installed on both sides of the insert shell 4. Inside the box 3, there is a limiting mechanism that works with the cover 2 to restrict the position of the insert shell 4. The limiting mechanism fixes the position of the insert shell 4 in two ways. When it is not needed, the insert shell 4 and the front surface of the cover 2 are at the same level. When it is needed, the plug is first inserted into the interior of the insert shell 4, and then the limiting mechanism is controlled to retract and press the insert shell 4 inward to fix the position of the insert shell 4 again through the limiting mechanism.

[0030] like Figure 3 and Figure 7 As shown: The limiting mechanism includes a support plate 17 and multiple rods 7; the multiple rods 7 are evenly installed on the inner bottom of the box 3, the support plate 17 is installed in the middle of the inner side of the box 3, the support plate 17 is provided with multiple sliding grooves 18, the support plate 17 is provided with a push plate 6, the bottom of the push plate 6 passes through the sliding groove 18 and is slidably connected to the outside of the rod 7, and a spring 8 is installed on the outside of the rod 7.

[0031] Spring 8 can automatically return to its original position after push plate 6 moves, facilitating future use. When the operator needs to press the insert 4 inward for electrical connection, first pinch the push plates 6 on both sides to move them along the slide groove 18 and rod 7, thereby causing the limiting insert 9 to retract from the upper limiting slot 16. Then, press the insert 4 inward. Once in position, release the pinched push plates 6. Spring 8 will allow the limiting insert 9 to automatically reset and insert into the lower limiting slot 16, thus limiting and fixing the position of the insert 4.

[0032] like Figure 5 and Figure 7 As shown: An inner plate 15 is installed on the inner side of the cover 2. Two limiting slots 16 are symmetrically opened on both sides of the inner plate 15. A limiting insert plate 9 is installed on one side of the push plate 6. One side of the limiting insert plate 9 penetrates the box body 3 and is adapted to the limiting slot 16. The limiting slot 16 can cooperate with the limiting insert plate 9 to restrict the position of the insert shell 4, so that the insert shell 4 is in a disconnected and connected state.

[0033] like Figure 4 As shown: Multiple limiting holes 11 are evenly distributed on the connecting strip 10, and multiple limiting posts 14 are evenly distributed on the insert shell 4. The multiple limiting posts 14 are adapted to the multiple limiting holes 11. During the movement of the insert shell 4, the position between the insert shell 4 and the connecting strip 10 is restricted, facilitating the mating and bonding of the contact plates.

[0034] Working principle:

[0035] The insert 4 is flush with the front surface of the cover 2. At this time, the limiting mechanism is in the "locked" state. Under the elastic force of the spring 8, the push plate 6 drives the limiting insert 9 to be inserted into the limiting slot 16 above the inner plate 15 on the inner side of the cover 2, fixing the position of the insert 4 and preventing it from sliding at will.

[0036] The connection between the second contact plate 12 on the connecting strip 10 and the external wire is sealed using a potting process to ensure no gas leakage at the wire connection point. The elastic membrane 13 between the socket 4 and the connecting strip 10 is in a naturally stretched state, tightly fitting the components on both sides to form an initial seal, preventing direct communication between the internal space and the external flammable and explosive environment.

[0037] When charging is required, insert the external charging plug into the socket of the housing 4. The plug's prongs contact the conductive components inside the housing 4, such as copper plates, which connect with the first contact plate 5, completing the initial positioning. Then, manually pinch the push plates 6 on both sides of the housing 4's casing 3 and push them inward along the slide groove 18 of the support plate 17. The bottom of the push plate 6 slides along the rod 7, compressing the spring 8, and simultaneously causing the limiting insert plate 9 to retract from the limiting slot 16 above the inner plate 15, releasing the position restriction on the housing 4.

[0038] Next, push the plug inward to press the housing 4. The limiting post 14 on the housing 4 slides synchronously along the limiting hole 11 of the connecting strip 10 to ensure that the housing 4 moves in a precise direction and to prevent misalignment between the first contact plate 5 and the second contact plate 12. As the housing 4 moves inward, the first contact plate 5 on one side gradually approaches and fits against the second contact plate 12 on the connecting strip 10. Both are made of highly conductive materials, such as copper, forming a conductive path. Electricity is transmitted to the plug through the contact plate to achieve charging.

[0039] After the first contact plate 5 and the second contact plate 12 are fully engaged, the push plate 6 is released, the spring 8 is reset and pushes the push plate 6 back, so that the limiting insert 9 is embedded in the limiting slot 16 below the inner plate 15, and the position of the insert shell 4 is fixed again to prevent contact separation due to external force during charging.

[0040] When the insert 4 moves inward, the elastic membrane 13 deforms but remains tightly attached to the insert 4 and the connecting strip 10, preventing the contact between the electric sparks that may be generated inside and the flammable and explosive gases outside. The connection between the outer shell 1 and the cover 2 adopts an explosion-proof surface design such as a stop fit to further enhance the sealing performance.

[0041] After charging is complete, squeeze the push plate 6 again to make the limiting insert 9 exit the lower limiting slot 16. Under the action of manually pulling the plug, the insert 4 moves outward along the sliding track, the first contact plate 5 separates from the second contact plate 12, and the conductive path is broken.

[0042] After the socket 4 is reset to be flush with the front surface of the cover 2, the push plate 6 is released, and the spring 8 pushes the limiting plate 9 to re-embed into the upper limiting slot 16, completing the overall reset and ensuring the explosion-proof seal when the socket is in a non-working state.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure of an explosion-proof charging socket, comprising a housing (1), characterized in that: A connecting bar (10) is installed on the bottom inner side of the housing (1), and a plurality of second contact plates (12) are installed on the connecting bar (10). The second contact plates (12) are connected to external wires. The front of the outer shell (1) is fitted with a cover (2), and the middle of the cover (2) is slidably connected with a plug shell (4). A plurality of first contact plates (5) are installed on one side of the plug shell (4), and the first contact plates (5) are adapted to the second contact plates (12). An elastic membrane (13) is installed between the insert (4) and the connecting bar (10); Boxes (3) are installed on both sides of the insert (4), and a limiting mechanism that cooperates with the cover (2) to restrict the position of the insert (4) is installed inside the box (3).

2. The flameproof charging socket structure according to claim 1, characterized in that: The limiting mechanism includes a support plate (17) and multiple rods (7); Multiple rods (7) are evenly installed on the inner bottom of the box (3). The support plate (17) is installed in the middle of the inner side of the box (3). Multiple sliding grooves (18) are provided on the support plate (17). A push plate (6) is provided on the support plate (17). The bottom of the push plate (6) passes through the sliding groove (18) and is slidably connected to the outside of the rod (7).

3. The flameproof charging socket structure according to claim 2, characterized in that: A spring (8) is installed on the outside of the rod (7).

4. The flameproof charging socket structure according to claim 2, characterized in that: An inner plate (15) is installed on the inner side of the cover (2), and two limiting slots (16) are symmetrically opened on both sides of the inner plate (15).

5. The flameproof charging socket structure according to claim 4, characterized in that: A limiting insert (9) is installed on one side of the push plate (6), and one side of the limiting insert (9) penetrates the box body (3) and is adapted to the limiting slot (16).

6. The flameproof charging socket structure according to claim 1, characterized in that: The connecting bar (10) is provided with a plurality of limiting holes (11) evenly, and the insert shell (4) is provided with a plurality of limiting posts (14) evenly, and the plurality of limiting posts (14) are adapted to the plurality of limiting holes (11).

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