A mine explosion-proof and intrinsically safe combined switch box structure

Abstract

The utility model relates to the technical field of combined switch box, specifically is a mine explosion -proof and intrinsically safe combined switch box structure, including the fixed connection of the inner thread cylinder with the box top, and the inner thread cylinder inside is linked together with the box inside, and the box body is located above the box, the connecting pipe is rotatably connected with the box body bottom, and the connecting pipe outside wall is equipped with the thread, the connecting pipe is screwed in the inner thread cylinder inside through the thread. In the utility model, the conduit is connected with the gas storage tank, the inert gas enters the box bottom, a plurality of hydraulic cylinders are started to drive the piston plate to move up, thereby making the space below the piston plate produce the negative pressure suction inside the original air of the box, thereby making the original air in the box be pushed up by the inert gas below and be sucked by the box body above to enter the box body, thereby replacing the original air in the box, and the safety of the box is improved.

Description

Technical Field

[0001] This utility model relates to the field of combined switch box technology, specifically a mine explosion-proof and intrinsically safe combined switch box structure. Background Technology

[0002] Mining explosion-proof and intrinsically safe combination switch boxes are electrical devices specifically designed for explosive gas environments such as underground coal mines. They combine explosion-proof and intrinsically safe features. The explosion-proof enclosure effectively prevents the propagation of internal explosions, while the low-energy circuit design used in intrinsic safety ensures that electrical sparks and thermal effects generated under normal or fault conditions will not trigger external explosions. Mining explosion-proof and intrinsically safe combination switch boxes typically have a certain degree of airtightness to prevent external gases, water, and dust from entering the box. However, when the box is opened or closed, the gas inside may mix with explosive gases in the environment. Usually, the internal gas can be vented through... The fan ventilates the interior of the enclosure. However, considering the presence of explosive gases in the environment, specially designed explosion-proof fans are typically used to replace and ventilate the air inside the enclosure. However, conventional explosion-proof fans are expensive, and while their explosion-proof principle relies on their own explosion-proof motors and special structural designs to effectively prevent sparks, arcs, or high temperatures from being generated during operation, thus avoiding explosions, it is difficult to prevent external explosive gases from entering the enclosure. This can lead to the presence of explosive gases inside the enclosure, posing a safety hazard and causing inconvenience. Furthermore, the special structural design of explosion-proof motors and other ventilation equipment makes maintenance difficult. Utility Model Content

[0003] The purpose of this utility model is to provide a mine-use explosion-proof and intrinsically safe combined switch box structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A mine-use explosion-proof and intrinsically safe combined switch box structure includes:

[0006] The system comprises a housing, a box for storing gas extracted from the housing, an extraction mechanism for extracting gas from the box, and an intake mechanism. An internally threaded cylinder is fixedly connected to the top surface of the housing, and the interior of the internally threaded cylinder is connected to the interior of the housing. The box is located above the housing. A connecting pipe is rotatably connected to the bottom of the box, and the outer wall of the connecting pipe is threaded. The connecting pipe is screwed into the internally threaded cylinder. The extraction mechanism is located inside the box and includes a piston plate that is slidably fitted inside the box. Multiple uprights are fixedly connected to the top surface of the piston plate, with the top of any upright penetrating the top surface of the box. The intake mechanism is fixedly connected to the top surface of the housing.

[0007] Furthermore, a connecting plate is provided on the top of the box body, and the bottom surface of the connecting plate is fixedly connected to the top of multiple uprights.

[0008] Furthermore, the bottom surface of the box is fixedly connected to multiple hydraulic cylinders via a connecting frame, and the movable end of any hydraulic cylinder is fixedly connected to the connecting plate.

[0009] Furthermore, the intake mechanism includes:

[0010] The box includes a connecting shell, a conduit for injecting air into the box, and a sliding ring for sealing the connecting shell. The connecting shell is fixedly connected to the top surface of the box. A circular hole is provided on the top surface of the box. One end of the conduit passes through the circular hole on the top surface of the box. A counterweight ring is fixedly sleeved on one end of the conduit. The sliding ring is slidably sleeved inside the connecting shell.

[0011] Furthermore, one end of the connecting shell is rotatably connected to a screw, and a threaded hole is provided on one side of the sliding ring, with the screw engaging with the threaded hole.

[0012] Furthermore, a rubber plug is movably engaged at the opening at the other end of the connecting shell;

[0013] Furthermore, the bottom surface of the box is fixedly connected with multiple L-shaped exhaust pipes, and a one-way valve is provided inside each exhaust pipe and the connecting pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] By connecting the conduit to the gas storage tank, inert gas inside the tank enters the bottom of the box. Multiple hydraulic cylinders are activated to move the connecting plate and the upright upwards. The upright pulls the piston plate upwards, creating a negative pressure in the space below the piston plate to draw in the original air inside the box. This causes the original air inside the box to be pushed upwards by the inert gas below and drawn in by the box above, thus replacing the original air inside the box and improving the safety of the box. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the extraction mechanism in this utility model;

[0018] Figure 3 This is an exploded view of the extraction mechanism structure in this utility model;

[0019] Figure 4 This is an exploded view of the air intake mechanism structure in this utility model.

[0020] In the diagram: 100, housing; 110, internal threaded cylinder; 200, box body; 210, connecting pipe; 220, exhaust pipe; 300, extraction mechanism; 310, piston plate; 320, upright; 321, connecting plate; 330, hydraulic cylinder; 400, air intake mechanism; 410, connecting shell; 420, conduit; 421, counterweight ring; 430, sliding ring; 431, screw; 440, rubber stopper. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4 In this embodiment of the present invention, a mine-use explosion-proof and intrinsically safe combination switch box structure includes a box body 100, a housing 200 capable of storing gas extracted from the inside of the box body 100, an extraction mechanism 300 capable of extracting gas from the inside of the housing 100 through the housing 200, and an air intake mechanism 400. An internally threaded cylinder 110 is fixedly connected to the top surface of the box body 100, and the interior of the internally threaded cylinder 110 communicates with the interior of the box body 100. The housing 200 is located above the housing 100, and the bottom of the housing 200... A connecting pipe 210 is rotatably connected, and the outer wall of the connecting pipe 210 is threaded. The connecting pipe 210 is screwed into the inner threaded cylinder 110 through the thread. The extraction mechanism 300 is located inside the box body 200. The extraction mechanism 300 includes a piston plate 310, which is slidably sleeved inside the box body 200. Multiple uprights 320 are fixedly connected to the top surface of the piston plate 310. The top of any upright 320 penetrates the top surface of the box body 200. The air intake mechanism 400 is fixedly connected to the top surface of the box body 100.

[0023] Specifically, the enclosure 100 is a conventional mine-use explosion-proof and intrinsically safe combination switch box. After the enclosure 100 is closed, the connecting pipe 210 is screwed into the internal threaded cylinder 110, and then the piston plate 310 is moved upward by pulling the upright rod 320. The surface of the piston plate 310 is made of rubber, which creates a negative pressure below the piston plate 310 to draw air from inside the enclosure 100. Then, inert gases such as nitrogen are injected into the enclosure 100 through the air intake mechanism 400, thereby reducing the content of flammable gases inside the enclosure 100 and improving the safety of the switch box. It has a simple structure, low cost, and is easy to maintain and replace.

[0024] Example 1

[0025] like Figure 2-3As shown, in this embodiment, a connecting plate 321 is provided above the box body 200, and the bottom surface of the connecting plate 321 is fixedly connected to the top of multiple uprights 320. Multiple hydraulic cylinders 330 are fixedly connected to the bottom surface of the box body 200 through a connecting frame, and the movable end of any hydraulic cylinder 330 is fixedly connected to the connecting plate 321.

[0026] In this embodiment, by activating the hydraulic cylinder 330, the connecting plate 321 and multiple uprights 320 can be moved synchronously, thereby moving the piston plate 310. The hydraulic cylinder 330 can be a manual hydraulic jack, which is convenient for users to use. Furthermore, since the hydraulic cylinder 330 is a manual jack and does not use electricity, it is less likely to generate sparks or other factors that could cause a gas explosion.

[0027] like Figure 1 and Figure 4 As shown, in this embodiment, the air intake mechanism 400 includes a connecting shell 410, a conduit 420 capable of injecting air into the housing 100, and a sliding ring 430 capable of sealing the connecting shell 410. The connecting shell 410 is fixedly connected to the top surface of the housing 200. A circular hole is opened on the top surface of the housing 200. One end of the conduit 420 passes through the circular hole on the top surface of the housing 200. A counterweight ring 421 is fixedly sleeved on one end of the conduit 420. The sliding ring 430 is slidably sleeved inside the connecting shell 410. A screw 431 is rotatably connected to one end of the connecting shell 410. A threaded hole is opened on one side of the sliding ring 430, and the screw 431 is screwed into the threaded hole. A rubber plug 440 is movably engaged at the opening of the other end of the connecting shell 410.

[0028] In practice, by rotating the screw 431 according to the gas density inside the housing 100, the screw 431 drives the sliding ring 430 to move. As the sliding ring 430 moves towards the connecting shell 410, one end of the conduit 420 is pulled downwards towards the bottom of the housing 100 by the weight of the counterweight ring 421. The conduit 420 is then connected to the inert gas storage tank, allowing inert gas to be introduced into the housing 100 through the conduit 420. When selecting the inert gas, the density of the inert gas introduced into the housing 100 should be referenced to ensure that it is greater than the original gas density inside the housing 100, thereby causing the inert gas to settle. Below the original gas inside the housing 100, and with the suction force generated by the movement of the piston plate 310 inside the box 200, the original gas inside the housing 100 enters the box 200, thereby replacing the original gas inside the housing 100 with an inert gas, improving the safety of the switch box. After the gas inside the housing 100 is replaced, the conduit 420 can be disconnected from the gas storage tank, and then the rubber plug 440 can be inserted into the opening at the other end of the connecting shell 410 to seal the connecting shell 410. The outer layer of the sliding ring 430 is made of rubber, making it difficult for external gas to enter the housing 100 through the sliding ring 430 and the circular hole.

[0029] Example 2

[0030] Based on Embodiment 1, an L-shaped exhaust pipe 220 is provided to facilitate the discharge of gas from inside the box 200.

[0031] like Figure 3 As shown, in this embodiment, a plurality of L-shaped exhaust pipes 220 are fixedly connected to the bottom surface of the box 200, and a one-way valve is provided inside each exhaust pipe 220 and the connecting pipe 210.

[0032] In practice, the one-way valve inside the connecting pipe 210 prevents the gas inside the housing 100 from flowing back into the box 200 after being drawn in, while the one-way valve inside the exhaust pipe 220 prevents outside gas from entering the box 200. When the piston plate 310 moves upward inside the box 200, the box 200 draws gas from inside the housing 100. Then, when the piston plate 310 moves downward, the gas inside the box 200 is discharged to the outside through multiple exhaust pipes 220, thereby quickly discharging the gas inside the box 200. This facilitates multiple replacements of the gas inside the housing 100 using the box 200, and also allows for ventilation of the inside of the housing 100 by replacing the gas inside the box 100.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A mining explosion-proof and intrinsically safe combined switch box structure, characterized in that, include: The top surface of the box (100) is fixedly connected to an internally threaded cylinder (110), and the inside of the internally threaded cylinder (110) is connected to the inside of the box (100); The box body (200) is located above the box body (100). The bottom of the box body (200) is rotatably connected to a connecting pipe (210), and the outer wall of the connecting pipe (210) is threaded. The connecting pipe (210) is screwed into the inner threaded cylinder (110) through the thread. The extraction mechanism (300) is located inside the box body (200). The extraction mechanism (300) includes a piston plate (310), and the piston plate (310) is slidably sleeved inside the box body (200). Multiple uprights (320) are fixedly connected to the top surface of the piston plate (310), and the top of any upright (320) penetrates the top surface of the box body (200). The air intake mechanism (400) is fixedly connected to the top surface of the housing (100).

2. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 1, characterized in that, A connecting plate (321) is provided above the box body (200), and the bottom surface of the connecting plate (321) is fixedly connected to the top of multiple uprights (320).

3. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 1, characterized in that, The bottom surface of the box (200) is fixedly connected to multiple hydraulic cylinders (330) via a connecting frame, and the movable end of any hydraulic cylinder (330) is fixedly connected to the connecting plate (321).

4. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 1, characterized in that, The bottom surface of the box (200) is fixedly connected with multiple L-shaped exhaust pipes (220), and a one-way valve is provided inside each exhaust pipe (220) and the connecting pipe (210).

5. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 1, characterized in that, The air intake mechanism (400) includes: A connecting shell (410) is fixedly connected to the top surface of the box body (200), and a circular hole is provided on the top surface of the box body (200); The conduit (420) has one end that passes through a circular hole on the top surface of the box (200), and a counterweight ring (421) is fixedly sleeved on one end of the conduit (420). The sliding ring (430) is slidably sleeved inside the connecting shell (410).

6. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 5, characterized in that, One end of the connecting shell (410) is rotatably connected to a screw (431), and a threaded hole is provided on one side of the sliding ring (430), and the screw (431) is screwed into the threaded hole.

7. The structure of the mine-use explosion-proof and intrinsically safe combined switch box according to claim 6, characterized in that, A rubber plug (440) is movably engaged at the opening at the other end of the connecting shell (410).

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