A locking device for the isolation handle and locking rod of explosion-proof electrical equipment

Abstract

This utility model discloses a locking device for the locking rod of an isolation handle of explosion-proof electrical equipment, which solves the technical problem of locking explosion-proof electrical equipment after power failure due to the lack of a through hole and the non-removable locking rod. It belongs to the technical field of explosion-proof electrical equipment in coal mines. This utility model includes a lower locking plate and a connecting plate. The connecting plate is vertically fixed to one side of the lower locking plate, and a limit fixing plate is vertically fixed to the connecting plate. A threaded hole is provided at the center of the limit fixing plate. The widths of the limit fixing plate, the lower locking plate, and the connecting plate are all in the range of 10mm to 40mm and are consistent. A limit screw is installed in the threaded hole.

Description

Technical Field

[0001] This utility model belongs to the technical field of explosion-proof electrical equipment in coal mines, and specifically relates to a locking device for the locking rod of the isolation handle of explosion-proof electrical equipment. Background Technology

[0002] In the underground working environment of coal mines, safety is always of paramount importance. According to strict safety regulations, all relevant electrical equipment must be locked during power outage maintenance operations. This is to prevent serious safety accidents caused by unauthorized equipment operation, which is undoubtedly a crucial link in ensuring safe production in coal mines.

[0003] However, a thorny problem has emerged in the actual management and operation of explosion-proof electrical equipment. Existing explosion-proof electrical equipment can be roughly divided into two categories: one type has a locking hole on the isolating handle locking rod, allowing for relatively convenient locking after a power outage; however, the other type is problematic because its isolating handle locking rod does not have such a hole, only a blind hole. Even more problematic is that these locking rods cannot be removed from the equipment, making it impossible to transport them to the surface for drilling or other processing. This situation directly results in the inability to lock this type of equipment according to safety requirements after a power outage.

[0004] Given the complexity and danger of underground coal mine operations, the inability to lock equipment poses a significant risk of accidental activation during power outages, potentially jeopardizing the lives of on-site personnel and severely violating established safety regulations. Therefore, it is necessary to develop an innovative technical method to solve the problem of locking explosion-proof electrical equipment without through holes and with non-removable locking rods after a power outage. Utility Model Content

[0005] The purpose of this utility model is to provide a locking device for the isolation handle locking rod of explosion-proof electrical equipment, which solves the technical problem of locking explosion-proof electrical equipment after power failure due to the lack of a through hole and the inability to disassemble the locking rod.

[0006] This utility model is achieved using the following technical solution: A locking device for the locking lever of an isolation handle of an explosion-proof electrical equipment includes a lower locking plate and a connecting plate. The connecting plate is vertically fixed to one side of the lower locking plate, and a limit fixing plate is vertically fixed to the connecting plate. A threaded hole is provided at the center of the limit fixing plate. The width of the limit fixing plate, the lower locking plate, and the connecting plate are all in the range of 10mm to 40mm and are consistent. A limit screw is installed in the threaded hole.

[0007] When applying, insert the lower locking plate vertically behind the locking rod of the explosion-proof switch isolating handle, so that the locking rod of the explosion-proof switch isolating handle fits into the gap between the lower locking plate and the limit fixing plate. Use a Phillips screwdriver to screw the limit screw into the threaded hole on the limit fixing plate until the limit screw is tightened into the blind hole on the locking rod of the explosion-proof switch isolating handle.

[0008] A further preferred embodiment includes an upper locking plate, which has a circular hole near one end, and a circular hole on the other side of the lower locking plate. The upper and lower locking plates have the same width, and the two circular holes are positioned correspondingly. The upper locking plate is rotatably connected to the other side of the connecting plate. The circular holes in the upper and lower locking plates are used together for padlocking, facilitating the locking of this utility model using a padlock.

[0009] More preferably, the center of the circular hole is 10mm away from one edge of the upper locking plate, and the center of the circular hole is 10mm away from the other edge of the lower locking plate.

[0010] More preferably, the center of the circular hole is located on the long axis of symmetry of the upper or lower locking plate.

[0011] More preferably, the upper locking plate, lower locking plate, limiting fixing plate, and connecting plate are made of 3mm thick steel plate. The limiting fixing plate is 30mm long and 30mm wide, and the diameter of the threaded hole is 6mm. The upper locking plate is 47mm long and 30mm wide, and the lower locking plate is 50mm long and 30mm wide. In application, the lower locking plate is fixed to the lower edge of the connecting plate. The limiting fixing plate is horizontally welded to the connecting plate 18mm away from the lower edge, and the lower locking plate is horizontally welded to the lower edge of the connecting plate.

[0012] This utility model has the following advantages over the prior art: it is small in size, easy to carry, and simple to operate, solving the safety problem that some explosion-proof switches in underground coal mines cannot be locked after a power outage. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This diagram shows the locking lever of the explosion-proof switch isolation handle of this utility model.

[0016] Figure 2This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 3 This is a front view schematic diagram of the present invention.

[0018] Figure 4 This is a schematic diagram of the right side of the present invention.

[0019] Figure 5 This is a top view of the present invention.

[0020] In the diagram: 1-Upper locking plate, 2-Limit fixing plate, 3-Lower locking plate, 4-Connecting plate, 5-Connecting pin, 6-Connecting ear, 7-Limiting screw, 8-Round hole. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0022] In this description, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joint" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0024] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Example

[0025] A locking device for the locking lever of an isolation handle of an explosion-proof electrical equipment includes a lower locking plate 3 and a connecting plate 4. The connecting plate 4 is vertically fixed to one side of the lower locking plate 3. A limit fixing plate 2 is vertically fixed to the connecting plate 4. A threaded hole is provided at the center of the limit fixing plate 2. The widths of the limit fixing plate 2, the lower locking plate 3, and the connecting plate 4 are in the range of 10mm to 40mm and are all the same. A limit screw 7 is installed in the threaded hole.

[0026] It also includes an upper locking plate 1, which has a circular hole 8 near one end. The lower locking plate 3 has a circular hole 8 on the other side. The upper locking plate 1 and the lower locking plate 3 have the same width, and the two circular holes 8 are positioned correspondingly. The upper locking plate 1 is rotatably connected to the other side of the connecting plate 4. In a specific implementation, the rotatable connection between the connecting plate 4 and the upper locking plate 1 can be achieved by fixing a connecting lug 6 on each of the top two sides of the other side of the connecting plate 4. The connecting lug 6 is a hollow tubular shape. A connecting lug 6 is fixedly fixed in the middle of the other end of the upper locking plate 1. After the three connecting lugs 6 are hollow and positioned on the same axis, a connecting pin 5 is inserted to achieve the rotatable connection between the upper locking plate 1 and the connecting plate 4.

[0027] The center of the circular hole 8 is 10mm away from one side edge of the upper locking plate 1, and the center of the circular hole 8 is 10mm away from the other side edge of the lower locking plate 3.

[0028] The center of the circular hole 8 is located on the long axis of symmetry of the upper locking plate 1 or the lower locking plate 3.

[0029] The upper locking plate 1, lower locking plate 3, limiting and fixing plate 2 and connecting plate 4 are made of 3mm thick steel plate. The limiting and fixing plate 2 is 30mm long and 30mm wide. The diameter of the threaded hole is 6mm. The upper locking plate 1 is 47mm long and 30mm wide. The lower locking plate 3 is 50mm long and 30mm wide.

[0030] The working principle is as follows: Insert the lower locking plate 3 vertically behind the locking rod of the explosion-proof switch isolating handle, so that the locking rod of the explosion-proof switch isolating handle fits into the gap between the lower locking plate 3 and the limiting fixing plate 2. After it is in place, adjust the upper locking plate 1 to be perpendicular to the lower locking plate 3. Use a Phillips screwdriver to screw the limiting screw 7 into the threaded hole on the limiting fixing plate 2 until the limiting screw 7 is tightened into the blind hole on the locking rod of the explosion-proof switch isolating handle. Finally, adjust the upper locking plate 1 to be parallel to the lower locking plate 3. Use a padlock to pass through the round holes 8 of the upper locking plate 1 and the lower locking plate 3 to lock the upper locking plate 1 and the lower locking plate 3. In this way, the padlock can further prevent others from accidentally energizing the electrical equipment under maintenance.

[0031] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A locking device for the locking lever of an isolation handle in explosion-proof electrical equipment, characterized in that: It includes a lower locking plate (3) and a connecting plate (4). The connecting plate (4) is vertically fixed to one side of the lower locking plate (3). The connecting plate (4) is vertically fixed to a limiting fixing plate (2). The limiting fixing plate (2) has a threaded hole at its center. The width of the limiting fixing plate (2), the lower locking plate (3) and the connecting plate (4) is all in the range of 10mm to 40mm and the width is consistent. The threaded hole is fitted with a limiting screw (7).

2. The locking device for the isolation handle locking rod of an explosion-proof electrical equipment according to claim 1, characterized in that: It also includes an upper locking plate (1), which has a round hole (8) near one end and a round hole (8) on the other side of the lower locking plate (3). The upper locking plate (1) and the lower locking plate (3) have the same width and the two round holes (8) are in corresponding positions. The upper locking plate (1) is rotatably connected to the other side of the connecting plate (4).

3. The locking device for the isolation handle locking rod of an explosion-proof electrical equipment according to claim 2, characterized in that: The center of the circular hole (8) is 10mm away from one side edge of the upper locking plate (1), and the center of the circular hole (8) is 10mm away from the other side edge of the lower locking plate (3).

4. The locking device for the isolation handle locking rod of an explosion-proof electrical equipment according to claim 3, characterized in that: The center of the circular hole (8) is located on the long axis of symmetry of the upper locking plate (1) or the lower locking plate (3).

5. A locking device for the isolation handle locking rod of an explosion-proof electrical equipment according to any one of claims 1-4, characterized in that: The upper locking plate (1), lower locking plate (3), limiting fixing plate (2) and connecting plate (4) are made of 3mm thick steel plate. The limiting fixing plate (2) is 30mm long and 30mm wide. The diameter of the threaded hole is 6mm. The upper locking plate (1) is 47mm long and 30mm wide. The lower locking plate (3) is 50mm long and 30mm wide.

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