Interlocking mechanism for high-voltage mutual inductor and door

Abstract

The utility model provides an interlocking mechanism for a high-voltage mutual inductor and a door, and belongs to the field of interlocking mechanisms. The problem of door opening and closing potential safety hazards caused by lack of mechanical interlocking between the high-voltage mutual inductor and the door at present is solved. Comprising an interlocking hook, a pin shaft, a limiting screw, a support and a tension spring, the support is fixed in a cabinet body provided with a high-voltage mutual inductor assembly, and a cylinder is fixed on one side of the high-voltage mutual inductor assembly; the top of the support is rotationally connected with the interlocking hook through a pin shaft, a tension spring is connected between the interlocking hook and the support, and the support is further provided with a limiting screw used for limiting the tension spring; a door nose matched with the interlocking hook is arranged in a door of the cabinet body; when the high-voltage mutual inductor assembly is located at a working position, the door nose and the interlocking hook are connected in a hooked mode, the cylinder and the interlocking hook are in a separated state, and when the high-voltage mutual inductor assembly exits and is powered off, the cylinder presses the interlocking hook downwards, and the door nose and the interlocking hook are separated. The mechanical interlocking device is applied to mechanical interlocking of the high-voltage mutual inductor and the door.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof electrical equipment for mines, in particular to an interlocking mechanism for a high-voltage mutual inductor and a door. Background Art

[0002] The explosion-proof high-voltage vacuum distribution device for mining is suitable for environments with explosive mixtures such as methane and coal dust in coal mines. However, when dealing with some emergencies, it is very likely that misoperation will occur, leading to safety accidents. Therefore, the equipment must be equipped with electrical and mechanical interlocking mechanisms to ensure the operation sequence. Generally, there will be a chamber for assembling the high-voltage transformer assembly in the high-voltage vacuum distribution device. Due to the high voltage of the high-voltage switchgear, in order to ensure the personal safety of the operating and maintenance personnel, there are strict requirements for some interlocking in the operation of the high-voltage switchgear. However, there is a lack of corresponding interlocking control mechanism between the current high-voltage transformer and the door, which may cause it to be energized when opening and closing the door, posing a safety hazard. Utility Model Content

[0003] In order to solve the problem of potential safety hazards in opening and closing doors caused by lack of mechanical interlocking between the high-voltage transformer and the door, the utility model proposes an interlocking mechanism for the high-voltage transformer and the door, the purpose of which is to ensure that there is no electricity when the door is opened by arranging an interlocking mechanism between the high-voltage transformer and the door.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: an interlocking mechanism for a high-voltage transformer and a door, comprising an interlocking hook, a pin, a limit screw, a bracket and a tension spring, wherein the bracket is fixed in a cabinet in which a high-voltage transformer assembly is installed, wherein the bracket is installed between the high-voltage transformer assembly and the door of the cabinet, and a cylinder is fixed on one side of the high-voltage transformer assembly;

[0005] The top of the bracket is rotatably connected to the interlocking hook through a pin shaft, a tension spring is connected between the interlocking hook and the bracket, and a limiting screw for limiting the tension spring is also installed on the bracket;

[0006] A door nose is arranged in the door of the cabinet, and the door nose cooperates with the interlocking hook;

[0007] When the high-voltage transformer assembly is in the working position, the door nose and the interlocking hook are hooked with each other, and the cylinder and the interlocking hook are in a separated state. When the high-voltage transformer assembly exits the power-off state, the cylinder presses down the interlocking hook, and the door nose and the interlocking hook are separated.

[0008] The interlocking hook comprises a hook-shaped connecting portion with a front end facing downward, a straight section in the middle, a convex surface at the rear end and an inclined surface at the end, and the bracket is connected to the straight section in the middle of the interlocking hook.

[0009] The high-voltage transformer assembly comprises a trolley, a high-voltage transformer is mounted on the trolley, and the cylinder is mounted on one side of the trolley.

[0010] The door of the cabinet is provided with a through hole which is opposite to the driving screw nut of the trolley.

[0011] The bracket is a "┛"-shaped bracket.

[0012] The limit screw is fixed on the bracket below the interlocking hook.

[0013] The beneficial effects of the utility model compared with the prior art are as follows: the interlocking mechanism for the high-voltage transformer and the door provided by the utility model is located inside the cabinet, and only when the transformer assembly is isolated and withdrawn, the cylinder presses down the interlocking hook, and then the door can be opened, thereby ensuring safety when opening the door. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of the utility model installed in the cabinet Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model installed in the cabinet Figure 2 ;

[0017] Figure 3 It is a structural schematic diagram of the high voltage transformer part of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the utility model;

[0019] In the figure: 1 is a copper contact, 2 is a high-voltage transformer, 3 is a trolley, 4 is a cylinder, 5 is an interlocking hook, 6 is a pin, 7 is a limit screw, 8 is a bracket, 9 is a tension spring, 10 is a cabinet, 11 is a high-voltage transformer assembly, and 12 is an interlocking mechanism. DETAILED DESCRIPTION

[0020] like Figures 1 to 4 As shown, the utility model provides an interlocking mechanism for a high-voltage transformer and a door, which is a mechanical interlocking device designed for the interlocking relationship between a high-voltage transformer (PT) assembly 11 and a door cover in a high-voltage power distribution device, installed inside a cabinet 10 and welded at the lower right corner of the cabinet 10 (the position can be determined according to the direction of opening the door), as shown in FIG. Figure 2As shown, the interlocking mechanism 12 is installed between the high-voltage transformer assembly 11 and the door of the cabinet 11, near the lower right corner of the cabinet 11, wherein the high-voltage transformer assembly 11 includes a trolley 3 installed in the cabinet 10, a high-voltage transformer 2 is installed on the trolley 3, the back of the trolley 3 is a copper contact 1 of the high-voltage transformer, and a cylinder 4 is installed on one side of the trolley 3, which is used to contact the interlocking mechanism 12 to complete the interlocking of the transformer assembly 11 and the door.

[0021] The interlocking mechanism includes an interlocking hook 5, a pin 6, a limit screw 7, a bracket 8 and a tension spring 9, wherein the bracket 8 is fixed to the side of the cylinder 4 near the side of the trolley 3 inside the cabinet 10, and the bracket 8 is a "┛"-shaped bracket. The top of the bracket 8 is rotatably connected with the interlocking hook 5 through the pin 6. The interlocking hook 5 and the horizontal plate of the bracket 8 are provided with circular holes, and the two circular holes are respectively connected to the two ends of the tension spring 9. The vertical plate of the bracket 8 is also equipped with a limit screw 7 for limiting the tension spring 9, and the limit screw 7 is specifically fixed below the interlocking hook 5.

[0022] The interlocking hook 5 is a horizontal plate, and a downward hook-shaped connecting part is provided at the front end of the horizontal plate, and the hook-shaped connecting part can cooperate with the door nose on the door. The middle section of the horizontal plate is a rectangular connecting part, which is connected to the bracket 8 through a pin shaft 6. The rear section of the horizontal plate is a trapezoidal connecting part, wherein the raised surface of the trapezoidal connecting part is located on the top surface. When the high-voltage transformer assembly 11 is powered off and exited, the inclined surface at the end of the trapezoidal connecting part can contact the cylinder 4 until the cylinder 4 contacts the raised surface of the trapezoidal connecting part. At this time, the interlocking hook 5 can be pressed down, and the hook-shaped connecting part at the front end of the interlocking hook 5 can be lifted, so that the interlocking hook 5 is separated from the door nose on the door, and the door can be opened at this time.

[0023] A through hole corresponding to the position of the driving screw nut on the trolley 3 is opened on the door, and the handle can be connected to the driving screw nut through the through hole, so as to realize the operation of the trolley 3 outside the door.

[0024] The operating principle of the utility model is as follows:

[0025] When the power-on operation is performed, the door is opened first, and the high-voltage transformer assembly 11 is pushed to the working position by shaking the trolley 3, and then the door is closed. The interlocking hook 5 hooks the door nose and cannot be disengaged under the action of the tension spring 9, ensuring that the door cannot be opened.

[0026] When performing maintenance operations, the trolley 3 is shaken by the handle outside the door to make the copper contact 1 retreat and isolate and open the switch. During the retreat process, the cylinder 4 of the high-voltage transformer assembly 11 gradually moves from the inclined surface at the end of the interlocking hook 5 to the convex surface. When the cylinder 4 moves to the convex surface of the interlocking hook 5, the interlocking hook 5 is pressed down to lift it up and unhook it, and the door can be opened.

[0027] The interlocking mechanism of the utility model realizes that when the power is turned on, the door cover cannot be opened through a simple structure, and the door can be opened when the isolation is disconnected, thereby ensuring the safety of opening the door.

[0028] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring about corresponding technical effects, and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An interlocking mechanism for a high voltage transformer and a door, characterized in that: It comprises an interlocking hook (5), a pin (6), a limit screw (7), a bracket (8) and a tension spring (9), wherein the bracket (8) is fixed in a cabinet (10) on which a high-voltage transformer assembly (11) is installed, wherein the bracket (8) is installed between the high-voltage transformer assembly (11) and a door of the cabinet (10), and a cylinder (4) is fixed on one side of the high-voltage transformer assembly (11); The top of the bracket (8) is rotatably connected to the interlocking hook (5) via a pin (6); a tension spring (9) is connected between the interlocking hook (5) and the bracket (8); and a limit screw (7) for limiting the position of the tension spring (9) is also installed on the bracket (8); A door nose is provided inside the door of the cabinet (10), and the door nose cooperates with the interlocking hook (5); When the high-voltage transformer assembly (11) is in the working position, the door nose and the interlocking hook (5) are connected to each other, and the cylinder (4) and the interlocking hook (5) are in a separated state. When the high-voltage transformer assembly (11) is out of power, the cylinder (4) presses down the interlocking hook (5), and the door nose and the interlocking hook (5) are separated.

2. The interlocking mechanism for a high voltage transformer and a door according to claim 1, characterized in that: The interlocking hook (5) comprises a hook-shaped connecting portion with a front end facing downward, a straight section in the middle, a convex surface at the rear end, and an inclined surface at the end, and the bracket (8) is connected to the straight section in the middle of the interlocking hook (5).

3. The interlocking mechanism for a high voltage transformer and a door according to claim 1, characterized in that: The high-voltage transformer assembly comprises a trolley (3), a high-voltage transformer (2) is mounted on the trolley (3), and the cylinder (4) is mounted on one side of the trolley (3).

4. The interlocking mechanism for a high voltage transformer and a door according to claim 3, characterized in that: The door of the cabinet (10) is provided with a through hole which is opposite to the position of the driving screw nut of the trolley (3).

5. The interlocking mechanism for a high voltage transformer and a door according to claim 1, characterized in that: The bracket (8) is a "┛"-shaped bracket.

6. The interlocking mechanism for a high voltage transformer and a door according to claim 1, characterized in that: The limit screw (7) is fixed on the bracket (8) below the interlocking hook (5).

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