Mining flame-proof and intrinsic safety type PLC control box

Abstract

The utility model relates to the technical field of explosion-proof control boxes, in particular to a mining explosion-proof and intrinsic safety type PLC control box which comprises a box body, a sleeve frame, a fixing mechanism and a moving mechanism, one side of the box body is of an opening structure, the box body is provided with a box door in a matched mode, and the sleeve frame is fixedly connected with the outer side of the opening of the box body in a sleeved mode. One side edge of the sleeve frame is rotationally connected with one side edge of the box door through a hinge, and the fixing mechanism is movably connected with the sleeve frame and the box door in a clamped mode. In the utility model, the box door is rotationally closed through the hinge, so that the box door is attached to the sleeve frame, then the two movable plates are pulled in the direction far away from the fixed frame, the two movable plates pull the four U-shaped clamping blocks to synchronously move towards the box door through the adjacent support arms, and the edges of the box door and the sleeve frame are synchronously embedded between the two arms of the four U-shaped clamping blocks; and then a nut is rotated to enable a gasket to abut against two moving plates, so that the four U-shaped clamping blocks are synchronously fixed, and the box door is conveniently used by a user.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof control box technology, specifically a mining explosion-proof and intrinsically safe PLC control box. Background Technology

[0002] Mining explosion-proof and intrinsically safe PLC control boxes are mainly used in various automated control devices in coal mines, such as drainage automation control and belt conveyor automation control. To provide explosion protection, the enclosure of these boxes is typically made of heavy metal. This heavy enclosure can withstand the explosion pressure of internal explosive gases and prevent the explosion from propagating outwards. The enclosure and door are usually connected by hinges. However, ordinary hinges cannot withstand the pressure generated by an internal explosion, which could cause the door to be blown open, allowing the explosion to spread outwards. To reduce this, a flange-like connection is usually added at the junction of the door and enclosure. Holes are drilled along the edges of the door and enclosure, and bolts are passed through these holes and screwed into nuts to reinforce the door and enclosure. However, this method requires a large number of bolts, making disassembly cumbersome and inconvenient for users during routine maintenance. Utility Model Content

[0003] The purpose of this invention is to provide a mine-use explosion-proof and intrinsically safe PLC control box 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 PLC control box includes:

[0006] The enclosure comprises a housing, a frame, a fixing mechanism, and a moving mechanism. One side of the housing is open, and a door is provided. The frame is fixedly fitted to the outside of the housing opening. One side of the frame is rotatably connected to one side of the door via a hinge. The fixing mechanism is movably engaged with the frame and the door. The fixing mechanism includes four U-shaped clamps located on the four sides of the frame. A fixing frame is fixedly fitted to the outer wall of the housing, with one side of the fixing frame parallel to one side of the frame. Multiple sliding grooves are provided on one side of the fixing frame. A slider is fixedly connected to both ends of one side of each U-shaped clamp, and each slider is slidably engaged within an adjacent sliding groove. The frame and the door are movably engaged between the two arms of adjacent U-shaped clamps. The moving mechanism is fixedly connected to the fixing mechanism.

[0007] Furthermore, one end of each arm of any U-shaped clamp is an arc-shaped surface.

[0008] Furthermore, both the outer wall of the door and the outer wall of the frame are inclined surfaces.

[0009] Furthermore, a U-shaped clamp has multiple rectangular holes on its inner wall, and any hinge is located inside an adjacent rectangular hole.

[0010] Furthermore, the moving mechanism includes:

[0011] The system comprises two movable plates and two screws. Each movable plate has a sleeve hole at the center of one side. Each U-shaped clamp has a U-shaped plate fixedly connected to both ends on one side. Each U-shaped plate has a support arm rotatably connected between its two arms. One end of each support arm is rotatably connected to the outer wall of the adjacent movable plate. One end of each screw is fixedly connected to one side of the fixed frame. The two screws are located on opposite sides of the fixed frame. The two sleeve holes are slidably engaged with the outer walls of the two screws.

[0012] Furthermore, both screws have nuts screwed onto their outer side walls, with each nut located between the adjacent moving plate and the fixed frame.

[0013] Furthermore, each of the two nuts is provided with a washer on one side, each washer is annular, and the inner wall of each washer is slidably sleeved with the outer wall of the adjacent screw.

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

[0015] By closing the cabinet door via hinges, the door is brought into contact with the frame. Then, the two movable plates are pulled away from the fixed frame, causing the two movable plates to pull the four U-shaped clamps synchronously towards the cabinet door via adjacent support arms. This allows the edges of the cabinet door and the frame to be simultaneously engaged between the two arms of the four U-shaped clamps, thus fixing and reinforcing the cabinet door. Then, the two nuts are manually turned so that they abut against adjacent washers, which in turn fix the two movable plates in place, thus simultaneously fixing the four U-shaped clamps. This makes the cabinet door easy for users to operate. 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 middle box door and the frame structure of this utility model;

[0018] Figure 3 This is a schematic diagram showing the positional relationship between the moving mechanism and the fixed mechanism in this utility model;

[0019] Figure 4 This is an exploded view of the moving mechanism and the fixed mechanism in this utility model.

[0020] In the diagram: 100, box body; 110, box door; 200, frame; 300, fixing mechanism; 310, U-shaped clamp; 311, slider; 320, fixing frame; 321, slide groove; 330, U-shaped plate; 331, support arm; 400, moving mechanism; 410, moving plate; 420, screw; 430, nut; 440, washer. 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 Figures 1-4 In this embodiment of the present invention, a mine-use explosion-proof and intrinsically safe PLC control box includes:

[0023] The enclosure 100 comprises a housing 100, a frame 200, a fixing mechanism 300, and a moving mechanism 400. One side of the housing 100 is open, and a door 110 is provided. The frame 200 is fixedly fitted to the outer side of the opening of the housing 100. One side of the frame 200 is rotatably connected to one side of the door 110 via a hinge. The fixing mechanism 300 is movably engaged with the frame 200 and the door 110. The fixing mechanism 300 includes four U-shaped clamps 310, and the four U-shaped clamps 310 are respectively located on the frame 200. On the four sides, a fixed frame 320 is fixedly fitted to the outer wall of the box 100, and one side of the fixed frame 320 is parallel to one side of the frame 200. Multiple sliding grooves 321 are opened on one side of the fixed frame 320. A slider 311 is fixedly connected to both ends of one side of any U-shaped clamp 310. Any slider 311 is slidably engaged in the interior of the adjacent sliding groove 321. The frame 200 and the box door 110 are movably engaged between the two arms of the adjacent U-shaped clamp 310. The moving mechanism 400 is fixedly connected to the fixing mechanism 300.

[0024] Specifically, by installing hinges on the frame 200 and connecting the hinges to the door 110, the door 110 can be rotated to open or rotated to fit against the frame 200 to close the opening of the box 100. When the door 110 is closed, it fits against the frame 200. At this time, four U-shaped clamps 310 can be slid and move synchronously towards the door 110, so that the four sides of the door 110 and the frame 200 are respectively engaged between the two arms of the four U-shaped clamps 310, thereby reinforcing the door 110 and the frame 200, and making it easier for users to close and reinforce the door 110.

[0025] Example 1

[0026] like Figures 2-4 As shown, in this embodiment, one end of each arm of any U-shaped clamp 310 is an arc surface, the outer wall of the box door 110 and the outer wall of the frame 200 are both inclined surfaces, and a U-shaped clamp 310 has multiple rectangular holes on one inner wall, and any hinge is located inside an adjacent rectangular hole.

[0027] In this embodiment, the edges of the door 110 and the frame 200 are beveled, and the two arms of the U-shaped clamp 310 are arc-shaped. This makes it easy for the edges of the door 110 and the frame 200 to be inserted between the two arms of the U-shaped clamp 310 when the door 110 and the frame 200 are closed and embedded in the U-shaped clamp 310. When the hinge on the frame 200 is embedded between the two arms of the adjacent U-shaped clamp 310, the hinge can be located inside the rectangular hole, which does not affect the U-shaped clamp 310 fixing the frame 200 and the door 110.

[0028] like Figures 3-4 As shown, in this embodiment, the moving mechanism 400 includes:

[0029] Two movable plates 410 and two screws 420 are provided. Each of the two movable plates 410 has a sleeve hole at the center of one side. Each U-shaped clamp 310 has a U-shaped plate 330 fixedly connected to both ends of one side. Each U-shaped plate 330 has a support arm 331 rotatably connected between its two arms. One end of each support arm 331 is rotatably connected to the outer wall of the adjacent movable plate 410. One end of each of the two screws 420 is fixedly connected to one side of the fixed frame 320. The two screws 420 are located on opposite sides of the fixed frame 320. The two sleeve holes are slidably sleeved with the outer walls of the two screws 420. Nuts 430 are screwed onto the outer walls of each of the two screws 420. Each nut 430 is located between the adjacent movable plate 410 and the fixed frame 320.

[0030] In specific implementation, both movable plates 410 abut against the side wall of the housing 100. The moving direction of the thicker movable plate 410 is limited by the sleeve hole and the screw 420. When the two movable plates 410 move towards the fixed frame 320, the movable plates 410 can simultaneously push the sliders 311 on the four U-shaped clamps 310 along the adjacent slide grooves 321 through the adjacent support arms 331, so that the U-shaped clamps 310 move away from the housing door 110 and the sleeve frame 200 simultaneously. When the movable plates 410 move towards the fixed frame 320, the sliding plates 410 can simultaneously push the sliders 311 on the four U-shaped clamps 310 along the adjacent slide grooves 321. When the two movable plates 410 are far from the fixed frame 320, the two movable plates 410 simultaneously pull the four U-shaped clamps 310 towards the box door 110 through the adjacent support arms 331. This allows the two arms of the multiple U-shaped clamps 310 to simultaneously engage the edges of the box door 110 and the frame 200, thereby reinforcing the box door 110 and the frame 200. Then, the user can rotate the two nuts 430 to abut against the two movable plates 410 to fix the position of the two movable plates 410, thereby simultaneously fixing the position of the multiple U-shaped clamps 310.

[0031] Example 2

[0032] Based on Embodiment 1, the pressure exerted by the nut 430 on the moving plate 410 is reduced by setting a shim 440.

[0033] like Figure 4 As shown, in this embodiment, a washer 440 is provided on one side of each of the two nuts 430. Each washer 440 is annular, and the inner wall of each washer 440 is slidably sleeved with the outer wall of the adjacent screw 420.

[0034] In practice, the gasket 440 has a relatively long diameter. By placing the gasket 440 between the nut 430 and the moving plate 410, the contact surface between the gasket 440 and the moving plate 410 can be increased, thus avoiding local stress concentration.

[0035] 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.

[0036] 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 mine-used explosion-proof and intrinsically safe PLC control box, characterized in that, include: The box (100) has an open structure on one side, and the box (100) is equipped with a box door (110); A sleeve frame (200) is fixedly sleeved to the outside of the opening of the box body (100), and one side of the sleeve frame (200) is rotatably connected to one side of the box door (110) by a hinge; A fixing mechanism (300) is movably engaged with the sleeve frame (200) and the box door (110). The fixing mechanism (300) includes four U-shaped clamps (310), and the four U-shaped clamps (310) are respectively located on the four sides of the sleeve frame (200). A fixing frame (320) is fixedly sleeved on the outer wall of the box body (100), and one side of the fixing frame (320) is parallel to one side of the sleeve frame (200). A plurality of sliding grooves (321) are opened on one side of the fixing frame (320). A slider (311) is fixedly connected to both ends of one side of any U-shaped clamp (310). Any slider (311) is slidably engaged in the interior of the adjacent sliding groove (321). The sleeve frame (200) and the box door (110) are movably engaged between the two arms of the adjacent U-shaped clamps (310). The moving mechanism (400) is fixedly connected to the fixed mechanism (300).

2. The mine-used explosion-proof and intrinsically safe PLC control box according to claim 1, characterized in that, The moving mechanism (400) includes: Two movable plates (410) each have a sleeve hole in the center of one side. Both ends of one side of any U-shaped clamp (310) are fixedly connected to a U-shaped plate (330). A support arm (331) is rotatably connected between the two arms of any U-shaped plate (330). One end of any support arm (331) is rotatably connected to the outer wall of the adjacent movable plate (410). Two screws (420) are fixedly connected at one end to one side of the fixed frame (320). The two screws (420) are located on opposite sides of the fixed frame (320). The two sleeve holes are slidably sleeved with the outer side walls of the two screws (420).

3. The mine-used explosion-proof and intrinsically safe PLC control box according to claim 2, characterized in that, Both screws (420) have nuts (430) screwed onto their outer side walls, and each nut (430) is located between the adjacent moving plate (410) and the fixed frame (320).

4. The explosion-proof and intrinsically safe PLC control box for mine of claim 1, characterized in that, Both arms of any U-shaped clamp (310) have an arc-shaped surface at one end.

5. The mine-used explosion-proof and intrinsically safe PLC control box according to claim 4, characterized in that, Both the outer wall of the door (110) and the outer wall of the frame (200) are inclined.

6. The mine-used explosion-proof and intrinsically safe PLC control box according to claim 5, characterized in that, A U-shaped clamp (310) has multiple rectangular holes on its inner wall, and any hinge is located inside an adjacent rectangular hole.

7. The mine-used explosion-proof and intrinsically safe PLC control box according to claim 3, characterized in that, Both nuts (430) are provided with washers (440) on one side. Each washer (440) is annular, and the inner wall of each washer (440) is slidably sleeved with the outer wall of the adjacent screw (420).

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