A protection device for preventing live cover opening of an electrical apparatus

Abstract

The utility model relates to the electrical explosion -proof field, concretely is a protection device that prevents electrical equipment live uncovering. It includes casing, upper cover subassembly and operating mechanism, casing inside is provided with mounting bracket, is provided with circuit breaker on mounting bracket, and circuit breaker has the operating handle of control on -off electricity, upper cover subassembly slidingly sets up in casing upper portion, operating mechanism includes setting up in casing and having guide slot's guide seat, top end rotation setting in the mobile link of casing bottom, horizontal setting in the push rod and slide bar of mobile link bottom end both sides and rotation setting in the two guide plates of guide slot, and guide slot top end is open, and guide slot includes vertical slide and is communicated in the two V -shaped slide way of vertical slide same side, two V -shaped slide way is along vertical direction and is distributed side by side, and V -shaped slide way's opening faces vertical slide, and two guide plates are along vertical direction and are distributed side by side. The utility model can automatically power off when uncovering, prevent live uncovering, and can automatically power on when closing, and the security is high.

Description

Technical Field

[0001] This utility model relates to the field of electrical explosion protection, and in particular to a protective device for preventing electrical equipment from being opened while energized. Background Technology

[0002] Explosion-proof electrical equipment is a type of electrical equipment used in locations with explosion hazards. It achieves explosion protection through the explosion-proof and flameproof properties of its enclosure, and is applicable to mining industries such as coal mines. When inspecting explosion-proof electrical equipment, the top cover needs to be opened. If the top cover is opened for maintenance without disconnecting the power, in flammable and explosive environments such as coal mines, mine accidents often occur, causing significant casualties and posing a substantial safety hazard. Utility Model Content

[0003] The purpose of this utility model is to address the problems existing in the background technology by proposing a protective device to prevent electrical equipment from being opened while energized. It can automatically cut off the power when the cover is opened to prevent opening while energized, and can automatically turn on the power when the cover is closed, thus ensuring high safety.

[0004] The present invention provides a protective device for preventing the opening of energized electrical equipment covers, comprising a housing, a cover assembly, and an operating mechanism. The housing contains a mounting bracket on which a circuit breaker is mounted, the circuit breaker having an operating handle for controlling power on / off. The cover assembly is slidably mounted on the upper part of the housing. The operating mechanism includes a guide seat with a guide groove inside the housing, a movable rod rotatably mounted at the bottom of the housing, a push rod and a slide rod horizontally mounted on both sides of the bottom end of the movable rod, and two guide plates rotatably mounted within the guide groove. The top of the guide groove is open, and the guide groove covers... It includes a vertical slide and two V-shaped slides connected to the same side of the vertical slide. The two V-shaped slides are arranged side by side in the vertical direction, and the openings of the V-shaped slides face the vertical slide. Two guide plates are arranged side by side in the vertical direction. When the upper guide plate is pushed open from top to bottom by the slide rod, it changes from a tilted downward state to a vertical downward state. When the lower guide plate is pushed open from bottom to top by the slide rod, it changes from a tilted upward state to a vertical upward state. The guide seat is equipped with two sets of reset components that respectively reset the upper guide plate to the tilted downward state and the lower guide plate to the tilted upward state.

[0005] Preferably, the length of the guide plate is greater than the width of the vertical slide of the guide groove.

[0006] Preferably, the bottom end of the movable rod is rotatably provided with a mounting shaft, and the push rod and the slide rod are coaxially mounted on the mounting shaft, with the diameter of the slide rod matching the width of the vertical slide of the guide groove.

[0007] Preferably, the top cover assembly includes a top cover, a handle disposed on the top of the top cover, and a plurality of guide components disposed at the bottom of the top cover and extending through the upper part of the housing.

[0008] Preferably, the upper part of the housing has a surrounding plate portion, and the guide assembly includes a guide rod, a sleeve, and a cover. The guide rod is vertically disposed at the bottom of the top cover, the sleeve is disposed on the surrounding plate portion, the guide rod is slidably disposed on the sleeve, and the cover is disposed at the bottom of the surrounding plate portion and located on the outer periphery of the sleeve.

[0009] Preferably, the bottom of the top cover is provided with a number of vertically distributed studs, the casing plate is provided with a number of through holes for the studs to pass through, and the lower part of the studs is threaded with nuts.

[0010] Preferably, the back of the guide seat is provided with two grooves, and the reset assembly includes a rotating shaft rotatably mounted on the guide seat, a pressure plate mounted on the rotating shaft, and a torsion spring fitted on the outer periphery of the rotating shaft. The guide plate is mounted on the rotating shaft, and the two ends of the torsion spring are pressed against the groove wall and the pressure plate, respectively.

[0011] Preferably, the pressure table has a pressure groove, and one end of the torsion spring is pressed into the pressure groove.

[0012] Compared with the prior art, this utility model has the following beneficial technical effects: This utility model can automatically cut off the power when the cover is opened, preventing the cover from being opened while energized. When the cover is closed, the circuit breaker is energized, automatically powering on the electrical equipment and ensuring the normal operation of the relevant equipment. The operation is simple and quick, effectively preventing the cover from being opened while energized, and ensuring high safety. Attached Figure Description

[0013] Figure 1 A structural schematic diagram showing the closed top cover state of this utility model embodiment; Figure 2 for Figure 1 A partial structural sectional view; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 4 This is a schematic diagram showing the state when the two guide plates are not in contact with the slide bar. Figure 5 This is a schematic diagram showing the state of the upper guide plate when it is pushed open from top to bottom by the sliding rod. Figure 6 This is a schematic diagram showing the state of the lower guide plate when it is pushed open from bottom to top by the sliding rod. Figure 7 This is a schematic diagram illustrating the principle that the guide plate can be reset after being pushed open.

[0014] Reference numerals: 1. Housing; 101. Through hole; 2. Mounting plate; 3. Top cover; 4. Handle; 5. Guide rod; 6. Sleeve; 7. Cover; 8. Stud; 9. Circuit breaker; 91. Operating handle; 10. Mounting bracket; 11. Moving rod; 12. Push rod; 13. Slide rod; 14. Guide seat; 141. Guide groove; 142. Groove; 15. Guide plate; 16. Rotating shaft; 17. Pressure table; 18. Torsion spring. Detailed Implementation

[0015] Example 1: As Figures 1-6 As shown in the figure, the protective device for preventing electrical equipment from being opened while energized according to this embodiment includes a housing 1, an upper cover assembly and an operating mechanism.

[0016] The bottom of the housing 1 is provided with several mounting plates 2, each with connecting holes. The upper part of the housing 1 has a surrounding plate, and the bottom of the top cover 3 is provided with several vertically distributed studs 8. The surrounding plate of the housing 1 is provided with several through holes 101 for the studs 8 to pass through, and nuts are threaded to the lower part of the studs 8. When the top cover 3 is installed on the top of the housing 1, the studs 8 pass through the through holes 101, and nuts are screwed on from the bottom of the studs 8, thereby firmly connecting the top cover 3 and the housing 1.

[0017] like Figure 2 As shown, a mounting bracket 10 is provided inside the housing 1, and a circuit breaker 9 is mounted on the mounting bracket 10. The circuit breaker 9 has an operating handle 91 for controlling the on and off of power. By moving the operating handle 91, the power on and off of the electrical equipment can be controlled. For the circuit breaker 9 in this embodiment, pushing the operating handle 91 upward corresponds to the circuit breaker 9 opening (power off), and pushing the operating handle 91 downward corresponds to the circuit breaker 9 closing (power on). The operating mechanism allows the operating handle 91 to be pressed and the circuit breaker 9 to be powered on when the top cover assembly is placed on top of the housing 1. When the top cover assembly is moved upward, the operating mechanism can be used to push the operating handle 91 upward to de-energize the circuit breaker 9, thereby avoiding opening the cover while it is energized.

[0018] like Figure 1 and Figure 2 As shown, the upper cover assembly is slidably mounted on the upper part of the housing 1. The upper cover assembly includes a top cover 3, a handle 4 located on the top of the top cover 3, and several guide components located at the bottom of the top cover 3 and penetrating the upper part of the housing 1. The bottom surface of the top cover 3 and the top surface of the housing 1 are both flat, allowing for a close fit when the top cover 3 is closed. A sealing gasket can also be further installed between the top cover 3 and the housing 1.

[0019] like Figure 2 As shown, the guide assembly includes a guide rod 5, a sleeve 6, and a cover 7. The guide rod 5 is vertically mounted at the bottom of the top cover 3, the sleeve 6 is mounted on the surrounding plate, and the guide rod 5 is slidably mounted on the sleeve 6. The cover 7 is located at the bottom of the surrounding plate and on the outer periphery of the sleeve 6. The guide assembly guides the upward and downward movement of the top cover 3. When the top cover 3 moves downward, the guide rod 5 is inserted into the sleeve 6, with its bottom end passing through the sleeve 6. The bottom end of the guide rod 5 is located inside the cover 7, which provides protection for the guide rod 5 and the sleeve 6. The bottom end of the guide rod 5 can be chamfered to facilitate its insertion into the sleeve 6.

[0020] like Figures 2-6As shown, the operating mechanism includes a guide seat 14 disposed within the housing 1 and having a guide groove 141, a movable rod 11 rotatably disposed at the bottom of the housing 1, a push rod 12 and a slide rod 13 horizontally disposed on both sides of the bottom end of the movable rod 11, and two guide plates 15 rotatably disposed within the guide groove 141. The top of the guide groove 141 is open, and a chamfer can be provided at the open end to facilitate the entry of the slide rod 13. The guide groove 141 includes a vertical slide and two V-shaped slides connected on the same side of the vertical slide. The two V-shaped slides are arranged side by side along the vertical direction, and the openings of the V-shaped slides face the vertical slide. The two guide plates 15 are arranged side by side along the vertical direction. When the upper guide plate 15 is pushed open from top to bottom by the slide rod 13, it changes from an inclined downward state to a vertical downward state, so that when the slide rod 13 moves downward subsequently, the push rod 12 pushes the operating handle 91 downward to energize the circuit breaker 9. When the lower guide plate 15 is pushed open from bottom to top by the slide rod 13, it changes from an inclined upward state to a vertical upward state. This allows the push rod 12 to push the operating handle 91 upward when the slide rod 13 moves upward, thereby disconnecting the circuit breaker 9. The guide seat 14 is equipped with two sets of reset components, one for resetting the upper guide plate 15 to an inclined downward state and the other for resetting the lower guide plate 15 to an inclined upward state. Regardless of how the operating handle 91 in the circuit breaker 9 is moved by the push rod 12, the guide plate 15 will be reset by the action of the reset components after the movement is completed, in preparation for the next opening or closing of the cover.

[0021] The length of the guide plate 15 is greater than the width of the vertical slide of the guide groove 141. The rotation center axis of the guide plate 15 is located at the theoretical left edge of the vertical slide of the guide groove 141, which is the part that communicates with the side of the V-shaped slide. The bottom end of the moving rod 11 is rotatably equipped with a mounting shaft. The push rod 12 and the slide rod 13 are coaxially mounted on the mounting shaft. The diameter of the slide rod 13 matches the width of the vertical slide of the guide groove 141, allowing it to slide within the vertical slide. When the slide rod 13 does not push the guide plate 15 away, it can slide between the guide plate 15 and the V-shaped slide, guided by the guide plate 15, or slide directly on the surface of the V-shaped slide.

[0022] When the cover is opened, the slide rod 13 is initially located at the bottom of the guide groove 141. The maintenance personnel unscrew the nut on the stud 8 and lift the top cover 3 using the handle 4. The guide rod 5 slides vertically upward in the sleeve 6. The slide rod 13 pushes the lower guide plate 15 upward (the lower guide plate 15 can rotate in the opposite direction and return to its original position against the side wall of the guide groove 141 after the slide rod 13 moves upward), and moves it to the lower left side of the upper guide plate 15. The push rod 12 pushes the downward-sloping operating handle 91 upward, switching the operating handle 91 to the upward-sloping state, and the circuit breaker 9 trips and disconnects the power. As the top cover 3 continues to move upward, the slide rod 13 continues to slide along the area formed between the upper guide plate 15 and the upper V-shaped slide, sliding into the upper V-shaped slide, so that the push rod 12 avoids the operating handle 91 during the movement. As the top cover 3 continues to move upward, the slide bar 13 moves out from the opening at the top of the guide groove 141, and the push rod 12 will not touch the upward-sloping operating handle 91.

[0023] When closing the cover, the maintenance personnel grasp handle 4 and lower the top cover 3, align the guide rod 5 with the sleeve 6 and insert it downwards. With the moving rod 11 hanging naturally, the sliding rod 13 aligns with the top opening of the guide groove 141. The top cover 3 continues to move downwards, the sliding rod 13 enters the guide groove 141 and moves to the upper right side of the upper guide plate 15. As the sliding rod 13 continues to move downwards, it pushes the upper guide plate 15 downwards, rotating it from an inclined downward position to a vertical downward position. The sliding rod 13 continues to move downwards, and the push rod 12 pushes the inclined upward operating handle 91 downwards, switching the operating handle 91 to an inclined downward position, and the circuit breaker 9 is closed and energized. The top cover 3 continues to move downwards, the sliding rod 13 moves to the upper left side of the lower guide plate 15, and enters the lower V-shaped slide under the guidance of the lower guide plate 15, so that the push rod 12 avoids the operating handle 91. As the top cover 3 continues to move downwards, the slide bar 13 eventually moves to the bottom of the guide groove 141. During this process, the push rod 12 will avoid the downward-sloping operating handle 91, preventing structural interference. Finally, tighten the nut onto the stud 8 to securely connect the housing 1 and the top cover 3.

[0024] This embodiment automatically cuts off power when the cover is opened. Pushing the operating handle 91 upwards via the push rod 12 de-energizes the circuit breaker 9, preventing the cover from being opened while energized. When the cover is closed, pushing the operating handle 91 downwards via the push rod 12 energizes the circuit breaker 9, automatically powering on the electrical equipment and ensuring its normal operation. Utilizing the opening and closing of the top cover 3 to link the power supply to and from the circuit breaker 9 is simple, quick, effectively prevents opening the cover while energized, and ensures high safety.

[0025] Example 2: Figures 1-7As shown, this embodiment proposes a protective device to prevent electrical equipment from being opened while energized. Compared to Embodiment 1, in this embodiment, the guide seat 14 has two grooves 142 on its back. The reset assembly includes a rotating shaft 16 rotatably mounted on the guide seat 14, a pressure plate 17 mounted on the rotating shaft 16, and a torsion spring 18 fitted around the outer periphery of the rotating shaft 16. The guide plate 15 is mounted on the rotating shaft 16, and the two ends of the torsion spring 18 are pressed against the groove wall of the groove 142 and the pressure plate 17, respectively. After the guide plate 15 is pushed open by the slide rod 13, the guide plate 15 drives the rotating shaft 16 to rotate, the rotating shaft 16 drives the pressure plate 17 to rotate, and the pressure plate 17 presses the torsion spring 18, causing the torsion spring 18 to twist. After the slide rod 13 is removed, the torsion spring 18 releases its elastic potential energy and, through the pressure plate 17, rotates the rotating shaft 16 in the opposite direction, thereby resetting the guide plate 15. The structure is simple and reliable.

[0026] To prevent the torsion spring 18 from coming loose, the pressure table 17 has a pressure groove. One end of the torsion spring 18 is pressed into the pressure groove. When the pressure table 17 rotates with the rotating shaft 16 and presses one end of the torsion spring 18, the torsion spring 18 is not easy to come loose during the torsion process.

[0027] In this embodiment, the reset component can reset the corresponding guide plate 15 to an inclined state after the slide bar 13 is moved away, in preparation for the next opening or closing of the cover.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A protective device for preventing the opening of a live electrical equipment cover, characterized in that, include: The housing (1) has an internal mounting bracket (10) and a circuit breaker (9) on the mounting bracket (10). The circuit breaker (9) has an operating handle (91) for controlling the power on and off. The upper cover assembly is slidably disposed on the upper part of the housing (1); The operating mechanism includes a guide seat (14) with a guide groove (141) disposed inside the housing (1), a moving rod (11) rotatably disposed at the bottom of the housing (1), a push rod (12) and a slide rod (13) horizontally disposed on both sides of the bottom end of the moving rod (11), and two guide plates (15) rotatably disposed inside the guide groove (141). The top of the guide groove (141) is open. The guide groove (141) includes a vertical slide and two V-shaped slides connected on the same side of the vertical slide. The two V-shaped slides are arranged side by side along the vertical direction. The V-shaped slide opening faces the vertical slide, and the two guide plates (15) are arranged side by side in the vertical direction. When the upper guide plate (15) is pushed open from top to bottom by the slide rod (13), it changes from the inclined downward state to the vertical downward state. When the lower guide plate (15) is pushed open from bottom to top by the slide rod (13), it changes from the inclined upward state to the vertical upward state. The guide seat (14) is provided with two sets of reset components that reset the upper guide plate (15) to the inclined downward state and the lower guide plate (15) to the inclined upward state, respectively.

2. The protective device for preventing the opening of energized electrical equipment according to claim 1, characterized in that, The length of the guide plate (15) is greater than the width of the vertical slide of the guide groove (141).

3. The protective device for preventing the opening of a live electrical equipment cover according to claim 1, characterized in that, The bottom end of the movable rod (11) is rotatably equipped with an installation shaft. The push rod (12) and the slide rod (13) are coaxially mounted on the installation shaft. The diameter of the slide rod (13) matches the width of the vertical slide of the guide groove (141).

4. A protective device for preventing the opening of a live electrical equipment cover according to claim 1, characterized in that, The top cover assembly includes a top cover (3), a handle (4) disposed on the top of the top cover (3), and several guide components disposed at the bottom of the top cover (3) and extending through the upper part of the housing (1).

5. A protective device for preventing the opening of a live electrical equipment cover according to claim 4, characterized in that, The upper part of the housing (1) has a surrounding plate. The guide assembly includes a guide rod (5), a sleeve (6) and a cover (7). The guide rod (5) is vertically arranged at the bottom of the top cover (3). The sleeve (6) is arranged on the surrounding plate. The guide rod (5) is slidably arranged on the sleeve (6). The cover (7) is arranged at the bottom of the surrounding plate and located on the outer periphery of the sleeve (6).

6. A protective device for preventing the opening of a live electrical equipment cover according to claim 5, characterized in that, The top cover (3) has several vertically distributed studs (8) at the bottom, and the shell (1) has several through holes (101) for the studs (8) to pass through. The studs (8) are threaded with nuts at the bottom.

7. A protective device for preventing the opening of a live electrical equipment cover according to claim 1, characterized in that, The guide seat (14) has two grooves (142) on its back. The reset assembly includes a rotating shaft (16) rotatably mounted on the guide seat (14), a pressure plate (17) mounted on the rotating shaft (16), and a torsion spring (18) fitted on the outer periphery of the rotating shaft (16). The guide plate (15) is mounted on the rotating shaft (16), and the two ends of the torsion spring (18) are pressed against the groove wall of the groove (142) and the pressure plate (17) respectively.

8. A protective device for preventing the opening of a live electrical equipment cover according to claim 7, characterized in that, The pressure table (17) has a pressure groove, and one end of the torsion spring (18) is pressed into the pressure groove.

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