An explosion-proof distribution box

Abstract

The utility model relates to the technical fields of explosion -proof distribution box, disclose a kind of explosion -proof distribution box, including electrical component, electric gate and electric meter, further include: fixed plate and electric box front shell;Electric box front shell is hinged on fixed plate, and electrical component is arranged in electric box front shell, electric gate and electric meter are arranged on electric box front shell;Sealing structure, sealing between fixed plate and electric box front shell by sealing structure;Nitrogen replacement structure, it is arranged at electric box front shell bottom, and by nitrogen replacement structure, gas in electric box front shell is replaced into nitrogen;Dustproof shell, it is arranged at electric box front shell outside.Compared with prior art, the advantages are that: the utility model is filled with nitrogen, and electrical components are immersed in highly flame-retardant inert gas, explosion-proof effect is realized, spark and arc can be effectively isolated, the life of electrical components is prolonged, use is safer and more reliable, and the utility model is filled with nitrogen by external nitrogen cylinder, and it is more convenient to supplement.

Description

Technical Field

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

[0002] Explosion-proof distribution boxes are electrical distribution equipment specifically designed for flammable and explosive environments. They effectively prevent internal explosions of electrical equipment or external explosions caused by sparks. They are suitable for use in petrochemical plants, oil platforms, chemical plants, pharmaceutical plants, coal mines, metallurgical plants, shipbuilding factories, military industries, textile mills, and other similar locations.

[0003] The existing explosion-proof distribution boxes on the market are mainly of the explosion-proof shell type and the flameproof type. One type achieves the explosion-proof effect by increasing the outer surface area to dissipate sparks and heat. The other type adopts the principle of explosion-proof isolation, which prevents the impact of electrical component failure on the surrounding environment by setting up isolation elements such as partitions or fuses inside. However, neither of these two types of explosion-proof distribution boxes can prevent the phenomenon of high-temperature combustion caused by electrical component failure, which will cause damage to itself. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide an explosion-proof distribution box, which achieves the explosion-proof effect by filling nitrogen gas and immersing electrical components in a highly flame-retardant inert gas.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] An explosion-proof distribution box includes electrical components, a switch, and an electrical meter, and further includes:

[0007] Fixed plate and front cover of electrical box; the front cover of electrical box is hinged to the fixed plate, and the electrical components are housed inside the front cover of electrical box, while the switch and electrical meter are housed on the front cover of electrical box;

[0008] A sealing structure is used to seal the space between the fixing plate and the front cover of the electrical box.

[0009] A nitrogen replacement structure is installed at the bottom of the front cover of the electrical box, and the gas inside the front cover of the electrical box is replaced with nitrogen through the nitrogen replacement structure.

[0010] A dust cover is installed on the outside of the front cover of the electrical box.

[0011] As an improvement, the sealing structure includes a rib ring and a sealing ring; the rib ring is formed on the fixed plate and is adapted to the front cover of the electrical box, the sealing ring is disposed on the rib ring, and after the front cover of the electrical box is closed, the sealing ring is interference-fitted with the inner wall of the front cover of the electrical box.

[0012] As an improvement, the nitrogen replacement structure includes an inflation pipe, an exhaust pipe, and a nitrogen cylinder; the inflation pipe and the exhaust pipe are respectively located at the bottom of the front cover of the electrical box, and both are equipped with valves, with the nitrogen cylinder connected to the bottom of the inflation pipe.

[0013] As an improvement, the dust cover is a square box structure with open bottom and rear side, with the top rear side hinged to a fixed plate, and a transparent window provided on the front side wall.

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. This utility model achieves an explosion-proof effect by filling the electrical components with nitrogen gas and immersing them in a highly flame-retardant inert gas. It can effectively isolate sparks and electric arcs, extend the life of electrical components, and make them safer and more reliable to use.

[0016] 2. This utility model uses an external nitrogen cylinder for nitrogen filling, which makes the replenishment method simple and more convenient to use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0019] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 3 .

[0020] Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0021] As shown in the figure: 1. Dustproof cover; 2. Transparent window; 3. Front cover of electrical box; 4. Fixing plate; 5. Inflation pipe; 6. Exhaust pipe; 7. Nitrogen cylinder; 8. Pressure gauge; 9. Electrical meter; 10. Switch; 11. Limit block; 12. Sliding block; 13. Mounting plate; 14. Rib ring; 15. Sealing ring. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] An explosion-proof distribution box, such as Figure 1 , 2 As shown in Figure 3, it includes:

[0025] The fixing plate 4 is a square plate structure, fixed to the wall, and has a circumferential rib ring 14 on its front side wall, with a sealing ring 15 on the rib ring 14. The mounting plate 13 is fixed to the fixing plate 4 inside the rib ring 14, and the electrical components are mounted on the mounting plate 13. The front cover 3 of the electrical box is a square box with an open rear side, which is adapted to the rib ring 14, and its left side is hinged to the front side wall of the fixing plate 4. After the front cover 3 of the electrical box is closed, it fits onto the rib ring 14, and the sealing ring 15 is interference-fitted with the inner wall of the front cover 3 of the electrical box (e.g., Figure 4 As shown), a seal is formed. The power switch 10, electrical meter 9, and control module are installed on the front cover 3 of the electrical box and connected to the electrical components inside the front cover 3. A limit block 11 is also formed on the right side wall of the front cover 3 of the electrical box, and a sliding block 12 is provided on the fixed plate 4 corresponding to the limit block 11. The sliding block 12 is a U-shaped structure, and its two ends are slidably installed on the fixed plate 4. After the limit block 11 is sleeved and fitted inside the sliding block 12, the front cover 3 of the electrical box is fixed in the closed state.

[0026] Nitrogen replacement structures, such as Figure 1 As shown, it includes an inflation pipe 5, an exhaust pipe 6, and a nitrogen cylinder 7; the inflation pipe 5 and the exhaust pipe 6 are respectively located at the bottom of the front cover 3 of the electrical box, and both are equipped with valves. The top air jet hole of the nitrogen cylinder 7 is provided with an internal thread structure, and the lower end of the inflation pipe 5 is correspondingly provided with an external thread structure. The nitrogen cylinder 7 is threadedly connected to the lower end of the inflation pipe 5. A pressure gauge 8 is also provided on the nitrogen cylinder 7.

[0027] Dustproof cover 1 Figure 2 As shown, it is a square box structure with open bottom and rear sides. Its top is hinged to the fixed plate 4, and a transparent window 2 is provided on the front side wall.

[0028] A gas composition detection sensor is also installed on the mounting plate 13, and the display is shown by the electrical meter 9. The electrical components, gas composition detection sensor, switch 10, and electrical meter 9, as well as their usage, are all existing mature technologies.

[0029] In the specific implementation of this embodiment:

[0030] Install the electrical components on the mounting plate 13 and connect them to the switch 10 and meter 9 on the front cover 3 of the electrical box. Close the front cover 3 of the electrical box and move the sliding block 12 to fit the limit block 11 inside the sliding block 12, so that the front cover 3 of the electrical box is fixed and sealed. Open the valves of the exhaust pipe 6 and the inflation pipe 5 to allow nitrogen to enter the front cover 3 of the electrical box and squeeze out the air. Read the gas composition through the meter 9. When the nitrogen content is sufficient and the electrical components are soaked, close the valves of the exhaust pipe 6 and the inflation pipe 5, and then close the top dust cover 1.

[0031] When the electrical meter 9 shows that the nitrogen content is insufficient, open the valves of the exhaust pipe 6 and the filling pipe 5 to replenish the nitrogen. After the nitrogen content is restored, close the valves of the exhaust pipe 6 and the filling pipe 5.

[0032] When the pressure gauge 8 shows insufficient pressure, the nitrogen cylinder 7 should be replaced or refilled in time.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An explosion-proof distribution box, comprising electrical components, a switch (10), and an electrical meter (9), characterized in that, Also includes: Fixed plate (4) and front cover of electrical box (3); the front cover of electrical box (3) is hinged to the fixed plate (4), and electrical components are installed inside the front cover of electrical box (3), and the switch (10) and electrical meter (9) are installed on the front cover of electrical box (3); The sealing structure seals the connection between the fixing plate (4) and the front cover (3) of the electrical box. The nitrogen replacement structure is set at the bottom of the front cover (3) of the electrical box, and the gas inside the front cover (3) of the electrical box is replaced with nitrogen through the nitrogen replacement structure; A dust cover (1) is installed on the outside of the front cover (3) of the electrical box.

2. The explosion-proof distribution box according to claim 1, characterized in that: The sealing structure includes a rib ring (14) and a sealing ring (15); the rib ring (14) is formed on the fixed plate (4) and is adapted to the front cover (3) of the electrical box; the sealing ring (15) is set on the rib ring (14); and after the front cover (3) of the electrical box is closed, the sealing ring (15) is interference-fitted with the inner wall of the front cover (3) of the electrical box.

3. The explosion-proof distribution box according to claim 1, characterized in that: The nitrogen replacement structure includes an inflation pipe (5), an exhaust pipe (6), and a nitrogen cylinder (7); the inflation pipe (5) and the exhaust pipe (6) are respectively located at the bottom of the front cover (3) of the electrical box, and both are equipped with valves, and the nitrogen cylinder (7) is connected to the bottom of the inflation pipe (5).

4. The explosion-proof distribution box according to claim 3, characterized in that: The nitrogen cylinder (7) has an internal thread structure on the top air jet hole, and the lower end of the inflation tube (5) has an external thread structure. The nitrogen cylinder (7) and the lower end of the inflation tube (5) are connected together by threaded engagement.

5. The explosion-proof distribution box according to claim 3, characterized in that: A pressure gauge (8) is installed on the nitrogen cylinder (7).

6. The explosion-proof distribution box according to claim 1, characterized in that: The dust cover (1) is a square box structure with open bottom and rear side, with its top hinged to the fixing plate (4) and a transparent window (2) on the front side wall.

7. The explosion-proof distribution box according to claim 2, characterized in that: It also includes a mounting plate (13), which is fixed on a fixing plate (4) inside the rib ring (14), and electrical components are mounted on the mounting plate (13).

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