Mining explosion-proof switch

Abstract

The utility model discloses a mining explosion-proof switch. The mining explosion-proof switch comprises a shell and a sealing mechanism, threading holes are formed in the left end and the right end of the shell, the upper surface of the shell is of an opening structure, a barrel is installed at the upper end of the shell, and a reversing switch is arranged at the lower end of the barrel; the sealing mechanism comprises a pressing ring, a first sealing rubber mat, a second sealing rubber mat and a third sealing rubber mat, the pressing ring is installed at the upper end of the shell and located between the limiting disc at the upper end of the barrel and the shell, the outer arc face of a circular ring on the lower surface of the pressing ring is fixedly sleeved with the first sealing rubber mat, and the inner arc face of the pressing ring is provided with the second sealing rubber mat; according to the mining explosion-proof switch, the internal air pressure of the installed explosion-proof switch can be increased only by pressing, explosive gas in a mine hole is prevented from entering the explosion-proof switch, the sealing effect of the explosion-proof switch is improved, the time required for installing the explosion-proof switch is shortened, and the mining explosion-proof switch is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof switches, in particular to a mine explosion-proof switch. Background Technique

[0002] As an important safety device, the main function of the explosion-proof switch is to quickly cut off the power supply when a circuit failure occurs, preventing sparks or arcs from causing an explosion. It is widely used in flammable and explosive places such as chemical industry, petroleum, and coal mines. Especially during the coal mining process, some flammable and explosive gases will inevitably be generated. The arc generated during the opening and closing of the mine circuit is extremely likely to ignite the explosive gas, resulting in an explosion inside the mine tunnel, with relatively high danger. Therefore, the switches used in mines must be explosion-proof switches to prevent explosions. In the prior art, the explosion-proof switch adopts a tight sealing design, and sealing components are provided at the gaps between the wire holes and components of the explosion-proof switch, which can prevent external explosive gases from entering the switch interior. At the same time, some high-pressure gases are injected into the explosion-proof switch interior to reduce the probability of external air entering the explosion-proof switch interior. However, the process of injecting high-pressure gases into the explosion-proof switch interior takes a relatively long time, resulting in an increase in the installation time required for the explosion-proof switch and making it more inconvenient to use. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a mine explosion-proof switch. By simply pressing, the air pressure inside the installed explosion-proof switch can be increased, preventing explosive gases in the mine tunnel from entering the explosion-proof switch interior and improving the sealing effect of the explosion-proof switch, which can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a mine explosion-proof switch, including a housing and a sealing mechanism;

[0005] Housing: Wire holes are provided at both the left and right ends thereof. The upper surface of the housing is an open structure. A cylinder is installed at the upper end of the housing, and a reversing switch is provided at the lower end of the cylinder.

[0006] Sealing mechanism: It includes a pressure ring, a first sealing gasket, a second sealing gasket, and a third sealing gasket. The pressure ring is installed at the upper end of the housing, located between the limiting disc at the upper end of the cylinder and the housing. The outer arc surface of the circular ring on the lower surface of the pressure ring is fixedly sleeved with the first sealing gasket. The inner arc surface of the pressure ring is provided with the second sealing gasket, and the second sealing gasket fits with the outer arc surface of the cylinder. The third sealing gasket that can be tightened is respectively arranged inside the wire holes. By simply pressing, the air pressure inside the installed explosion-proof switch can be increased, preventing explosive gases in the mine tunnel from entering the explosion-proof switch interior, improving the sealing effect of the explosion-proof switch, reducing the installation time required for the explosion-proof switch, and making the use of the mine explosion-proof switch more convenient.

[0007] Further, the sealing mechanism further includes a limiting ring, a polymerization ring and a threaded ring. The threaded rings are respectively threadedly connected to the inside of the wire passing holes. Polymerization rings are provided on the sides of the threaded rings close to the center of the housing. Sealing rubber gaskets III are provided on the inner arc surfaces of the polymerization rings. The limiting rings are respectively arranged on the inner arc surfaces of the wire passing holes. The tapered inner arc surfaces of the limiting rings are fitted and installed with the polymerization rings to deform the sealing rubber gaskets III.

[0008] Further, the sealing mechanism further includes a clamping groove, which is arranged on the outer arc surface of the cylinder body. The clamping groove is fitted and installed with the sealing rubber gasket II to increase the contact area between the sealing rubber gasket II and the cylinder body.

[0009] Further, a groove is provided on the inner arc surface of the pressing ring. A plastic ring is slidably connected to the inside of the groove. A sealing rubber gasket II is provided on the inner arc surface of the plastic ring. Vent holes are respectively provided on the lower surface of the groove. The sealing rubber gasket II is further deformed by the increase of air pressure.

[0010] Further, connecting plates are provided at both the left and right ends of the housing. The connecting plates are both U-shaped plates. Hexagonal bolts are respectively threadedly connected to the inside of the connecting plates. The hexagonal bolts respectively pass through the connecting holes on the surfaces of the pressing ring and the cylinder body limiting plate to connect the housing, the pressing ring and the cylinder body.

[0011] Further, fixing plates are respectively provided at the lower ends of the outer side surfaces of the housing to fix the position of the housing.

[0012] Further, outer hexagonal rings are provided at the ends of the threaded rings away from the center of the housing to facilitate the rotation of the threaded rings.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: This mine explosion-proof switch has the following advantages:

[0014] After the wiring of the explosion-proof switch is completed, press the lower end of the cylinder body into the housing to reduce the space inside the housing. The sealing rubber gasket I, the sealing rubber gasket II and the sealing rubber gasket III block the air from discharging outwards, increasing the air pressure inside the housing. Just by pressing, the air pressure inside the installed explosion-proof switch can be increased, preventing the explosive gas in the mine tunnel from entering the explosion-proof switch, improving the sealing effect of the explosion-proof switch, reducing the time required for the installation of the explosion-proof switch, and making the use of the mine explosion-proof switch more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the overall device of the present utility model in a front view sectional view;

[0017] Figure 3 is a schematic enlarged structural diagram of part A of the present utility model;

[0018] Figure 4 This is a structural schematic diagram of the explosion of the overall device of the present utility model.

[0019] In the figure: 1 housing, 2 wire passing holes, 3 cylinder body, 4 forward and reverse switch, 5 sealing mechanism, 51 pressing ring, 52 first sealing rubber pad, 53 second sealing rubber pad, 54 clamping groove, 55 limiting ring, 56 polymerization ring, 57 third sealing rubber pad, 58 threaded ring, 6 groove, 7 plastic ring, 8 ventilation hole, 9 connecting plate, 10 hexagon bolt, 11 fixing plate, 12 external hexagon ring. Specific embodiments

[0020] 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.

[0021] Please refer to Figures 1-4 , this embodiment provides a technical solution: a mine explosion-proof switch, including a housing 1 and a sealing mechanism 5;

[0022] Housing 1: Wire passing holes 2 are provided at both the left and right ends thereof, facilitating the entry of mine electric wires into the interior of the housing 1. The upper surface of the housing 1 is an open structure. A cylinder body 3 is installed at the upper end of the housing 1. A forward and reverse switch 4 is provided at the lower end of the cylinder body 3 to control the on-off of the mine circuit. Fixing plates 11 are respectively provided at the lower end of the outer side surface of the housing 1 to facilitate the fixation of the position of the housing 1;

[0023] Sealing mechanism 5: It includes a pressure ring 51, a first sealing gasket 52, a second sealing gasket 53 and a third sealing gasket 57. The pressure ring 51 is installed at the upper end of the housing 1. The pressure ring 51 is located between the limiting disk at the upper end of the cylinder body 3 and the housing 1. The circular outer arc surface of the lower surface of the pressure ring 51 is fixedly sleeved with the first sealing gasket 52. The first sealing gasket 52 is pressed against the surface of the housing 1 by the pressure ring 51, and the first sealing gasket 52 is used to seal between the pressure ring 51 and the housing 1. The inner arc surface of the pressure ring 51 is provided with the second sealing gasket 53, and the second sealing gasket 53 is attached to the outer arc surface of the cylinder body 3. The second sealing gasket 53 is used to seal between the pressure ring 51 and the cylinder body 3. The third sealing gaskets 57 that can be tightened are respectively arranged inside the wire passing holes 2. The third sealing gaskets 57 are tightened to seal between the wire passing holes 2 and the mining electric wires. Then, press the cylinder body 3 to make the cylinder body 3 move downward. The lower end of the cylinder body 3 is inserted into the housing 1, and the space inside the housing 1 decreases. The first sealing gasket 52, the second sealing gasket 53 and the third sealing gaskets 57 block the air from discharging outward, so that the air pressure inside the housing 1 increases, preventing external explosive gases from entering the housing 1 and improving the sealing effect of the explosion-proof switch. The sealing mechanism 5 further includes a limiting ring 55, a polymerization ring 56 and a threaded ring 58. The threaded rings 58 are respectively threadedly connected inside the wire passing holes 2. The polymerization rings 56 are provided on the sides of the threaded rings 58 close to the center of the housing 1. The inner arc surfaces of the polymerization rings 56 are provided with the third sealing gaskets 57. The limiting rings 55 are respectively arranged on the inner arc surfaces of the wire passing holes 2. The tapered inner arc surfaces of the limiting rings 55 are fitted and installed with the polymerization rings 56. After wiring is completed, insert the polymerization ring 56 into the wire passing hole 2 and rotate the threaded ring 58. Through the threaded connection between the threaded ring 58 and the wire passing hole 2, the polymerization ring 56 continuously goes deep into the wire passing hole 2. During the movement of the polymerization ring 56, the tapered inner arc surface of the limiting ring 55 applies a force to the polymerization ring 56, making the mining electric wires gather together, restricting the positions of the mining electric wires, and at the same time deforming the third sealing gaskets 57. The third sealing gaskets 57 are used to seal between the mining electric wires and the wire passing holes 2. The sealing mechanism 5 further includes a card slot 54. The card slot 54 is arranged on the outer arc surface of the cylinder body 3. The card slot 54 is fitted and installed with the second sealing gasket 53, increasing the contact area between the cylinder body 3 and the second sealing gasket 53 and improving the sealing effect of the second sealing gasket 53. The inner arc surface of the pressure ring 51 is provided with a groove 6. A plastic ring 7 is slidably connected inside the groove 6. The inner arc surface of the plastic ring 7 is provided with the second sealing gasket 53. The lower surface of the groove 6 is respectively provided with ventilation holes 8. The plastic ring 7 is an elastic plastic ring and can be deformed. When the air pressure inside the housing 1 increases, under the communication of the ventilation holes 8, the air pressure inside the groove 6 increases. The plastic ring 7 applies a force to the second sealing gasket 53, making the second sealing gasket 53 further deformed and improving the sealing effect of the second sealing gasket 53. Connecting plates 9 are provided at both the left and right ends of the housing 1. The connecting plates 9 are all U-shaped plates, which are convenient for restricting the vertical position of the pressure ring 51. Hexagonal bolts 10 are respectively threadedly connected inside the connecting plates 9.The hexagonal bolts 10 pass through the connection holes on the surface of the limiting plates of the pressing ring 51 and the cylinder body 3 respectively to fix the positions among the housing 1, the pressing ring 51 and the cylinder body 3. At one end of the thread ring 58 far from the center of the housing 1, external hexagonal rings 12 are provided, which is convenient for rotating the thread ring 58.

[0024] The working principle of a mine explosion-proof switch provided by the present utility model is as follows: When in use, mine lines are respectively passed through the polymerization ring 56 and the wire passing holes 2 and connected to the reversing switch 4. After the wiring is completed, the polymerization ring 56 is inserted into the wire passing holes 2, and the thread ring 58 is rotated. Through the threaded connection between the thread ring 58 and the wire passing holes 2, the polymerization ring 56 continuously penetrates into the wire passing holes 2. During the movement of the polymerization ring 56, the conical inner arc surface of the limiting ring 55 applies a force to the polymerization ring 56 to gather the mine wires, limit the positions of the mine wires, and at the same time cause the sealing gasket III 57 to deform. The sealing gasket III 57 is used to seal between the mine wires and the wire passing holes 2. Then, the pressing ring 51 is used to press the sealing gasket I 52 on the surface of the housing 1. At the same time, the pressing ring 51 is rotated so that the limiting plate of the pressing ring 51 is located in the relief groove in the middle of the connecting plate 9. The U-shaped connecting plate 9 is used to limit the up and down positions of the pressing ring 51. At this time, the sealing gasket II 53 is used to seal between the pressing ring 51 and the cylinder body 3, and the sealing gasket I 52 is used to seal between the pressing ring 51 and the housing 1 to maintain the sealed state of the upper opening of the housing 1. Then, the cylinder body 3 is pressed to make the cylinder body 3 move downward. The lower end of the cylinder body 3 is inserted into the housing 1, and the space inside the housing 1 is reduced. The sealing gasket I 52, the sealing gasket II 53 and the sealing gasket III 57 block the air from discharging outward, so that the air pressure inside the housing 1 increases, preventing external explosive gases from entering the housing 1 and improving the sealing effect of the explosion-proof switch.

[0025] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural or equivalent process transformations made by using the content of the description and drawings of the present utility model, or directly or indirectly applied to other related technical fields, are similarly included in the patent protection scope of the present utility model.

Claims

1. A mining explosion-proof switch, characterized in that: It comprises a housing (1) and a sealing mechanism (5); Shell (1): Both left and right ends of the shell are provided with threading holes (2); the upper surface of the shell (1) is an open structure; a cylinder (3) is installed at the upper end of the shell (1); and a forward / reverse switch (4) is provided at the lower end of the cylinder (3); The sealing mechanism (5) comprises a pressure ring (51), a sealing rubber pad 1 (52), a sealing rubber pad 2 (53) and a sealing rubber pad 3 (57). The pressure ring (51) is mounted on the upper end of the shell (1). The pressure ring (51) is located between the limit plate at the upper end of the cylinder (3) and the shell (1). The outer arc surface of the circular ring on the lower surface of the pressure ring (51) is provided with a sealing rubber pad 1 (52). The inner arc surface of the pressure ring (51) is provided with a sealing rubber pad 2 (53). The sealing rubber pad 2 (53) is fitted with the outer arc surface of the cylinder (3). The tightenable sealing rubber pad 3 (57) is respectively arranged inside the threading hole (2).

2. The explosion-proof switch for mining according to claim 1, characterized in that: The sealing mechanism (5) further comprises a limiting ring (55), a polymer ring (56) and a threaded ring (58), wherein the threaded ring (58) is respectively threadedly connected to the inside of the threading hole (2), the side surface of the threaded ring (58) close to the center of the shell (1) is provided with a polymer ring (56), the inner arc surface of the polymer ring (56) is provided with a sealing rubber pad three (57), the limiting ring (55) is respectively arranged on the inner arc surface of the threading hole (2), and the conical inner arc surface of the limiting ring (55) is installed in coordination with the polymer ring (56).

3. The explosion-proof switch for mining according to claim 1, characterized in that: The sealing mechanism (5) further comprises a clamping groove (54), wherein the clamping groove (54) is arranged on the outer arc surface of the cylinder (3), and the clamping groove (54) is installed in cooperation with the second sealing rubber pad (53).

4. The explosion-proof switch for mining according to claim 1, characterized in that: The inner arc surface of the pressure ring (51) is provided with a groove (6), the interior of the groove (6) is slidably connected with a plastic ring (7), the inner arc surface of the plastic ring (7) is provided with a second sealing rubber pad (53), and the lower surface of the groove (6) is respectively provided with ventilation holes (8).

5. The explosion-proof switch for mining according to claim 1, characterized in that: The left and right ends of the housing (1) are both provided with connecting plates (9), the connecting plates (9) are all U-shaped plates, the interiors of the connecting plates (9) are both threadedly connected with hexagonal bolts (10), and the hexagonal bolts (10) respectively pass through connecting holes on the surface of the pressure ring (51) and the limiting plate of the cylinder (3).

6. The explosion-proof switch for mining according to claim 1, characterized in that: A fixing plate (11) is respectively provided at the lower end of the outer side surface of the shell (1).

7. The explosion-proof switch for mining according to claim 2, characterized in that: An outer hexagonal ring (12) is provided at one end of the threaded ring (58) away from the center of the housing (1).

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