Anti-misoperation mechanical locking device for high-voltage switch cabinet

Abstract

The invention relates to the field of industrial high-voltage switch cabinets, and discloses an anti-misoperation mechanical locking device for a high-voltage switch cabinet, which comprises a cabinet body, the bottom of the front end of the cabinet body is rotatably connected with a lower door plate, the top of the front end of the cabinet body is rotatably connected with an upper door plate, and the interior of the upper door plate is fixedly connected with a display. An electromagnetic lock is fixedly connected to the interior of the lower door plate, a dismounting and mounting mechanism is slidably connected to the interior of the electromagnetic lock, a bunching mechanism is fixedly connected to the rear side of the electromagnetic lock, a sealing mechanism is fixedly connected to the front side of the electromagnetic lock, and the dismounting and mounting mechanism comprises two sliding plates; the exteriors of the two sliding plates are slidably connected to the interior of the electromagnetic lock, and the front sides of the sliding plates are fixedly connected with transmission assemblies. And by loosening the pulling force on the holding plate, the reset force of the first spring is utilized, the first spring gives a force in the opposite direction to the limiting plate for resetting, the limiting plate is clamped in the limiting frame to complete fixing, and then the maintenance efficiency is improved.

Description

Technical Field

[0004]

[0001] The present invention relates to the field of industrial high - voltage switchgear, and particularly to an anti - misoperation mechanical interlock device for high - voltage switchgear. Background Art

[0002] A high - voltage switchgear refers to a complete set of electrical equipment used in the power system to break, control, protect, and monitor circuits with a voltage level of 3 kV and above. It usually consists of a circuit breaker, disconnector, load switch, fuse, transformer, measuring instrument, protection device, and auxiliary equipment, etc. It is installed in a closed or semi - closed metal cabinet, featuring a compact structure, safe operation, and convenient maintenance. It is widely used in the power distribution links of power systems such as substations, power plants, and industrial enterprises. The anti - misoperation device of the high - voltage switchgear needs to meet the "five - prevention" requirements, and the combination of mechanical interlock and electromagnetic lock can effectively achieve these functions. If the line is charged, the electromagnetic lock locks the operating mechanism and the cabinet door. When performing maintenance during power outage, first trip the circuit breaker. After the display updates the status and there is no current in the line, unlock the disconnector and open it. After the disconnector is tripped, unlock the grounding switch and close it. After grounding is completed, the cabinet door can be opened for maintenance. If the cabinet door is not closed, the circuit breaker cannot be closed. After the maintenance is completed, first disconnect the grounding switch, then unlock and close the disconnector, and finally unlock the circuit breaker to close and restore power supply.

[0003] However, in the prior art, when disassembling and assembling the electromagnetic lock of the anti - misoperation mechanical interlock device of some high - voltage switchgears, screws and tools are needed for disassembly and assembly, and the operation process is cumbersome and time - consuming, reducing the maintenance efficiency. Therefore, an anti - misoperation mechanical interlock device for high - voltage switchgear is proposed to solve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an anti - misoperation mechanical interlock device for high - voltage switchgear, which solves the problem that when disassembling and assembling the electromagnetic lock of the anti - misoperation mechanical interlock device of some high - voltage switchgears, screws and tools are needed, and the operation is complex, time - consuming, and laborious.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a mechanical interlocking device for preventing misoperation in a high-voltage switchgear, comprising a cabinet, a lower door panel rotatably connected to the bottom front end of the cabinet, an upper door panel rotatably connected to the top front end of the cabinet, a display fixedly connected inside the upper door panel, an electromagnetic lock fixedly connected inside the lower door panel, a disassembly and assembly mechanism slidably connected inside the electromagnetic lock, a wire harness mechanism fixedly connected to the rear side of the electromagnetic lock, and a sealing mechanism fixedly connected to the front side of the electromagnetic lock. The disassembly and assembly mechanism includes two sliding plates, the two sliding plates being slidably connected to the interior of the electromagnetic lock, a transmission component fixedly connected to the front side of the sliding plates, two positioning shafts slidably connected inside the two sliding plates, a spring sleeved on the exterior of the positioning shafts, a limit plate fixedly connected to the opposite side of each of the two sliding plates, and a limit frame slidably connected to the opposite end of each of the two limit plates.

[0006] Preferably, the wire harness mechanism includes a side plate, the front side of which is fixedly connected to the rear side of the electromagnetic lock. Multiple connectors are fixedly connected to the front top of the side plate, and multiple lower templates are fixedly connected to the rear top of the side plate. Guide posts are fixedly connected to both the left and right ends of the top of the side plate. Springs are sleeved on the outside of each guide post. A sliding plate is slidably connected to the outside of the two guide posts. An arc-shaped plate is fixedly connected to the rear of the sliding plate. Multiple connecting blocks are fixedly connected to the top of the sliding plate. A connecting plate is fixedly connected to the top of each connecting block. A pressing post is fixedly connected to the front bottom of the connecting plate. Multiple upper templates are fixedly connected to the bottom of the sliding plate.

[0007] Preferably, the sealing mechanism includes a fixed ring, the rear side of which is fixedly connected to the front side of the electromagnetic lock, a threaded post is threadedly connected to the inside of the fixed ring, a connecting plate is fixedly connected to the front side of the threaded post, a sealing ring is fixedly connected to the inside of the fixed ring, trapezoidal plates are slidably connected to both the left and right ends of the fixed ring, and guide plates are fixedly connected to both the upper and lower sides of the trapezoidal plates.

[0008] Preferably, both of the transfer components include a transfer plate, the rear side of which is fixedly connected to the front side of the sliding plate, and a gripping plate is fixedly connected to the front side of the transfer plate.

[0009] Preferably, the two positioning shafts are externally fixedly connected to the inside of the electromagnetic lock, and the adjacent sides of the two sliding plates are respectively fixedly connected to the left and right ends of the two springs.

[0010] Preferably, the rear sides of the two limiting frames are fixedly connected to the front side of the lower door panel, and the electromagnetic lock has a limiting opening on its front side.

[0011] Preferably, the two limiting plates are externally slidably connected to the inside of the lower door panel, and the two grip plates are externally slidably connected to the inside of the limiting opening.

[0012] Preferably, the top ends of the two springs are fixedly connected to the bottom side of the sliding plate, and the bottom ends of the two springs are fixedly connected to the top side of the side plate.

[0013] Preferably, the external part of the pressing column is slidably connected to the inside of the connector, and the bottom side of the upper template is in contact with the top side of the lower template.

[0014] Preferably, the left and right ends of the fixing ring are provided with strip-shaped openings, the two guide plates are slidably connected inside the strip-shaped openings, the outside of the threaded column is in contact with the near end of the two trapezoidal plates, and the far end of the two trapezoidal plates is slidably connected inside the left and right ends of the sealing ring respectively.

[0015] This invention provides a mechanical interlocking device for preventing misoperation in high-voltage switchgear. It has the following advantages: 1. This invention improves maintenance efficiency by releasing the tension of the gripping plate and using the resetting force of the spring to apply a reverse force to the limiting plate, which then locks it inside the limiting frame.

[0016] 2. This invention releases the tension on the arc-shaped plate, and uses the force of the spring to reset the slide plate to drive multiple upper templates to reset and move downward. The upper and lower templates tightly clamp the wires to achieve fixation and prevent cable tangling. At the same time, the pressing column is inserted into the connector to complete the quick connection of the wires, thereby improving the connection efficiency.

[0017] 3. This invention slides the two trapezoidal plates to opposite sides, and uses the trapezoidal plates to compress and deform the sealing ring, making it fit tightly against the front of the electromagnetic lock, effectively preventing dust and moisture from entering, thereby extending its service life. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the upper door panel of the present invention; Figure 3 This is a schematic diagram of the lower door panel of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the limiting plate of the present invention; Figure 6 This is a schematic diagram of the transfer plate of the present invention; Figure 7This is a schematic diagram of the positioning shaft of the present invention; Figure 8 This is a schematic diagram of the connecting plate of the present invention; Figure 9 This is a schematic diagram of the connecting plate of the present invention.

[0019] The components include: 1. Cabinet body; 2. Lower door panel; 3. Upper door panel; 4. Monitor; 5. Electromagnetic lock; 6. Disassembly and assembly mechanism; 61. Sliding plate; 62. Transfer assembly; 621. Transfer plate; 622. Grip plate; 63. Positioning shaft; 64. Spring 1; 65. Limiting plate; 66. Limiting frame; 67. Limiting opening; 7. Cable management mechanism; 71. Side panel; 72. Connector; 73. Lower template; 74. Guide column; 75. Spring 2; 76. Sliding plate; 77. Curved plate; 78. Connecting block; 79. Connecting plate; 710. Pressing column; 711. Upper template; 8. Sealing mechanism; 81. Fixing ring; 82. Threaded column; 83. Connecting plate; 84. Sealing ring; 85. Strip opening; 86. Trapezoidal plate; 87. Guide plate. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see the appendix Figure 1 - Appendix Figure 9 This invention provides a mechanical interlocking device for preventing misoperation in high-voltage switchgear, comprising a cabinet 1. The cabinet 1 serves as the basic load-bearing structure and is made of cold-rolled steel plate, capable of withstanding various stresses and external impacts under high-voltage environments. A lower door panel 2 is rotatably connected to the bottom front end of the cabinet 1. The lower door panel 2 is rotatably connected to the cabinet 1 via two hinges made of stainless steel, which are corrosion-resistant and wear-resistant, ensuring that the lower door panel 2 can rotate flexibly and stably, facilitating maintenance and repair work by operators. An upper door panel 3 is rotatably connected to the top front end of the cabinet 1. The upper door panel 3 is also rotatably connected to the top of the cabinet 1 via two hinges. The hinges are of the same specifications as those used in the lower door panel 2, ensuring the uniformity and stability of the overall structure. A display 4 is fixedly connected inside the upper door panel 3. This is prior art and will not be described in detail here. The display 4 is an industrial-grade touchscreen, featuring high definition and high brightness, capable of clearly displaying operating information and equipment status under various lighting conditions. An electromagnetic lock 5 is fixedly connected inside the lower door panel 2. The electromagnetic lock 5 is made of high-performance electromagnetic material and can achieve fast and stable locking and unlocking operations in both power-on and power-off states. This is existing technology and will not be described in detail here.

[0022] Please see the appendix Figure 5 - Appendix Figure 7 The electromagnetic lock 5 has an internal sliding connection to a disassembly and assembly mechanism 6, which facilitates the disassembly and installation of the electromagnetic lock 5, improving equipment maintenance efficiency. The disassembly and assembly mechanism 6 includes two sliding plates 61, which are externally slidably connected to the inside of the electromagnetic lock 5. The two sliding plates 61 are arranged parallel to each other in a sliding groove inside the electromagnetic lock 5, ensuring smooth sliding within the electromagnetic lock 5. A transmission assembly 62 is fixedly connected to the front side of each sliding plate 61, which transmits the external force applied by the operator to the sliding plate 61, enabling its sliding operation. Both transmission assemblies 62 include a transmission plate 621, the rear side of which is fixedly connected to the front side of the sliding plate 61 by welding. A gripping plate 622 is fixedly connected to the front side of the transmission plate 621; pushing the gripping plate 622 causes it to slide, which in turn drives the transmission plate 621 to slide. Two positioning shafts 63 are internally slidably connected to the two sliding plates 61, guiding the sliding of the sliding plates 61. The two positioning shafts 63 are externally fixedly connected to the inside of the electromagnetic lock 5 and are fixed by welding, so that the positioning shafts 63 can stably provide guidance; A spring 64 is sleeved on the outside of the positioning shaft 63. By restricting the spring 64, the force on the spring 64 is evenly distributed. The adjacent sides of the two sliding plates 61 are fixedly connected to the left and right ends of the two springs 64, respectively. Under the action of the springs 64, the sliding plates 61 can automatically return to their original position after sliding and compressing the springs 64. Limiting plates 65 are fixedly connected to the opposite sides of the two sliding plates 61. The function of the limiting plates 65 is to limit the sliding range of the sliding plates 61 and prevent them from sliding out of the electromagnetic lock 5. Limiting frames 66 are slidably connected to the opposite ends of the two limiting plates 65. The limiting frames 66 are used to further restrict the movement of the limiting plates 65 and ensure the stability of the sliding plates 61. The rear sides of the two limiting frames 66 are fixedly connected to the front side of the lower door panel 2 by welding, thereby providing support for the limiting frames 66. The electromagnetic lock 5 has a limiting opening 67 on its front side. The size of the limiting opening 67 is adapted to the grip plate 622, ensuring that the grip plate 622 can slide smoothly within the limiting opening 67, while also providing a certain limiting effect on the grip plate 622. The two grip plates 622 are externally slidably connected to the inside of the limiting opening 67, guiding the grip plates 622 to slide horizontally through the limiting opening 67.

[0023] Please see the appendix Figure 3 Appendix Figure 4 and attached Figure 8A cable management mechanism 7 is fixedly connected to the rear side of the electromagnetic lock 5. This mechanism organizes and secures the wires connecting the electromagnetic lock 5 and the display 4, ensuring neatness and safety. The cable management mechanism 7 includes a side plate 71, the front of which is fixedly connected to the rear side of the electromagnetic lock 5 by welding, providing support for the side plate 71. Multiple connectors 72 are fixedly connected to the top front end of the side plate 71, used to connect wires to the display 4. Multiple lower templates 73 are fixedly connected to the top rear end of the side plate 71, providing support for the cables. Guide posts 74 are fixedly connected to both the left and right ends of the top side of the side plate 71, vertically fixed to the side plate 71. Springs 75 are fitted around the outside of the guide posts 74, ensuring even force distribution. Sliding plates 76 are slidably connected to the outside of the two guide posts 74, guiding their up-and-down movement. The top ends of the two springs 75 are fixedly connected to the bottom side of the sliding plate 76. The sliding plate 76 slides downward and then compresses the two springs 75, so that the two springs 75 store elastic potential energy, and then give the sliding plate 76 a force in the opposite direction to reset it. An arc-shaped plate 77 is fixedly connected to the rear side of the sliding plate 76. Pushing the arc-shaped plate 77 causes the sliding plate 76 to slide synchronously. The bottom ends of two springs 75 are fixedly connected to the top side of the side plate 71, ensuring even force distribution on the springs. Multiple connecting blocks 78 are fixedly connected to the top side of the sliding plate 76, secured by welding, providing support for the connecting blocks 78. A connecting plate 79 is fixedly connected to the top side of the connecting block 78, and a pressing post 710 is fixedly connected to the front bottom side of the connecting plate 79. The pressing post 710 is slidably connected to the inside of the connector 72, guiding the pressing post 710 for fixation, and then securing the cable, reducing the time wasted on screw fixing. Multiple upper templates 711 are fixedly connected to the bottom side of the sliding plate 76. The bottom side of the upper template 711 is in contact with the top side of the lower template 73. Through the elastic force of the second spring 75, the upper template 711 and the lower template 73 can tightly clamp the wire to fix the wire.

[0024] Please see the appendix Figure 5 and attached Figure 9A sealing mechanism 8 is fixedly connected to the front of the electromagnetic lock 5. The sealing mechanism 8 prevents dust and moisture from entering the electromagnetic lock 5, ensuring its normal operation. The sealing mechanism 8 includes a fixing ring 81, whose rear side is fixedly connected to the front of the electromagnetic lock 5 by welding, thus providing support for the fixing ring 81. A threaded post 82 is threadedly connected internally to the fixing ring 81. The threaded fit between the threaded post 82 and the fixing ring 81 is highly precise, ensuring stable rotation of the threaded post 82. A connecting plate 83 is fixedly connected to the front of the threaded post 82, facilitating rotation of the threaded post 82 by the operator. A sealing ring 84 is fixedly connected internally to the fixing ring 81. The sealing ring 84 is made of highly elastic rubber, providing excellent sealing performance and effectively preventing dust and moisture from entering. Both ends of the fixed ring 81 have slotted openings 85, providing internal space for movement. Trapezoidal plates 86 are slidably connected to both ends of the fixed ring 81, allowing them to slide stably. The threaded post 82 contacts the adjacent ends of the two trapezoidal plates 86; rotating the threaded post 82 pushes the trapezoidal plates 86 to slide within the fixed ring 81. The distant ends of the two trapezoidal plates 86 are slidably connected to the left and right ends of the sealing ring 84, ensuring a tight seal between the sealing ring 84 and the threaded post 82, thus improving the sealing effect. Guide plates 87 are fixedly connected to the upper and lower sides of the trapezoidal plates 86, slidably connected inside the slotted openings 85. The guide plates 87 ensure accurate sliding direction of the trapezoidal plates 86, preventing deviation.

[0025] Working principle: When the electromagnetic lock 5 needs to be disassembled for maintenance, the operator holds the two grip plates 622 and slides them to the same side. Then, the grip plates 622 drive the transmission plate 621 to slide, and then drive the sliding plate 61 to slide. At this time, the two sliding plates 61 will slide to the same side and squeeze the two springs 64, so that the two springs 64 can store elastic potential energy, and then give the sliding plate 61 a force in the opposite direction to reset it. During the sliding process of the sliding plate 61, it will also drive the limiting plate 65 to slide, so that the limiting plate 65 slides into the limiting frame 66. At this time, the electromagnetic lock 5 can be removed. Conversely, the pulling force on the grip plates 622 is released, and the force of the springs 64 resets the limiting plate 65 by giving it a force in the opposite direction, and it is locked into the limiting frame 66 to complete the fixation. First, the curved plate 77 is pushed to drive the sliding plate 76 to slide upwards. Then, the connecting plate 79 is driven to slide through the connecting block 78, thereby causing the pressing column 710 to slide away from the inside of the connector 72. During the sliding process of the sliding plate 76, multiple upper templates 711 will also slide and stretch multiple springs 75, allowing the springs 75 to store elastic potential energy. Then, the sliding plate 76 will apply a force in the opposite direction to the upper templates 711 to reset them. Then, the wire is passed through the connector 72. At this time, the tension on the curved plate 77 is released. The reset force of the springs 75 will drive the multiple upper templates 711 to reset and move downwards through the sliding plate 76. The upper templates 711 and the lower template 73 will tightly clamp the wire to achieve fixation. At the same time, the pressing column 710 is inserted into the connector 72 to complete the quick connection of the wire. To ensure the normal working environment of the electromagnetic lock 5, the threaded column 82 is rotated by rotating the connecting plate 83, so that the threaded column 82 rotates and moves inside the fixed ring 81, and then slides against the two trapezoidal plates 86 to the opposite side. The trapezoidal plates 86 squeeze the sealing ring 84 to deform it and fit it tightly against the front side of the electromagnetic lock 5, effectively preventing dust and moisture from entering.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mechanical interlocking device for preventing misoperation in high-voltage switchgear, comprising a cabinet (1), characterized in that, The cabinet (1) is rotatably connected to a lower door panel (2) at the bottom front end, and to an upper door panel (3) at the top front end. A display (4) is fixedly connected inside the upper door panel (3), and an electromagnetic lock (5) is fixedly connected inside the lower door panel (2). A disassembly and assembly mechanism (6) is slidably connected inside the electromagnetic lock (5). A wire harness mechanism (7) is fixedly connected to the rear side of the electromagnetic lock (5), and a sealing mechanism (8) is fixedly connected to the front side of the electromagnetic lock (5). The disassembly and assembly mechanism (6) includes two sliding plates (61). The two sliding plates (61) are slidably connected to the outside of the electromagnetic lock (5). A transmission component (62) is fixedly connected to the front side of the sliding plate (61). Two positioning shafts (63) are slidably connected inside the two sliding plates (61). A spring (64) is sleeved on the outside of the positioning shafts (63). A limit plate (65) is fixedly connected to the opposite side of the two sliding plates (61). A limit frame (66) is slidably connected to the opposite end of the two limit plates (65).

2. The anti-misoperation mechanical interlocking device for high-voltage switchgear according to claim 1, characterized in that, The wire harness mechanism (7) includes a side plate (71). The front side of the side plate (71) is fixedly connected to the rear side of the electromagnetic lock (5). Multiple connectors (72) are fixedly connected to the front end of the top side of the side plate (71). Multiple lower templates (73) are fixedly connected to the rear end of the top side of the side plate (71). Guide posts (74) are fixedly connected to both the left and right ends of the top side of the side plate (71). Springs (75) are sleeved on the outside of the guide posts (74). Sliding plates (76) are slidably connected to the outside of the two guide posts (74). An arc plate (77) is fixedly connected to the rear side of the sliding plate (76). Multiple connecting blocks (78) are fixedly connected to the top side of the sliding plate (76). A connecting plate (79) is fixedly connected to the top side of the connecting block (78). A pressing post (710) is fixedly connected to the front end of the bottom side of the connecting plate (79). Multiple upper templates (711) are fixedly connected to the bottom side of the sliding plate (76).

3. The anti-misoperation mechanical interlocking device for high-voltage switchgear according to claim 1, characterized in that, The sealing mechanism (8) includes a fixing ring (81), the rear side of which is fixedly connected to the front side of the electromagnetic lock (5). The fixing ring (81) is internally threaded with a threaded post (82), the front side of which is fixedly connected with a connecting plate (83), the fixing ring (81) is internally fixedly connected with a sealing ring (84), and the left and right ends of the fixing ring (81) are slidably connected with trapezoidal plates (86). The upper and lower sides of the trapezoidal plates (86) are fixedly connected with guide plates (87).

4. The anti-misoperation mechanical interlocking device for high-voltage switchgear according to claim 1, characterized in that, Both of the transfer components (62) include a transfer plate (621), the rear side of which is fixedly connected to the front side of the sliding plate (61), and a gripping plate (622) is fixedly connected to the front side of the transfer plate (621).

5. A mechanical interlocking device for preventing misoperation in high-voltage switchgear according to claim 1, characterized in that, The two positioning shafts (63) are externally fixedly connected to the inside of the electromagnetic lock (5), and the two sliding plates (61) are respectively fixedly connected to the left and right ends of the two springs (64) on their adjacent sides.

6. A mechanical interlocking device for preventing misoperation in a high-voltage switchgear according to claim 4, characterized in that, The rear sides of the two limiting frames (66) are fixedly connected to the front side of the lower door panel (2), and the front side of the electromagnetic lock (5) has a limiting opening (67).

7. A mechanical interlocking device for preventing misoperation in a high-voltage switchgear according to claim 6, characterized in that, The two limiting plates (65) are externally slidably connected to the inside of the lower door panel (2), and the two grip plates (622) are externally slidably connected to the inside of the limiting opening (67).

8. A mechanical interlocking device for preventing misoperation in a high-voltage switchgear according to claim 2, characterized in that, The top ends of the two springs (75) are fixedly connected to the bottom side of the sliding plate (76), and the bottom ends of the two springs (75) are fixedly connected to the top side of the side plate (71).

9. A mechanical interlocking device for preventing misoperation in a high-voltage switchgear according to claim 2, characterized in that, The external sliding connection of the pressing column (710) is inside the connector (72), and the bottom side of the upper template (711) is in contact with the top side of the lower template (73).

10. A mechanical interlocking device for preventing misoperation in a high-voltage switchgear according to claim 3, characterized in that, The fixed ring (81) has a strip opening (85) inside both the left and right ends. The two guide plates (87) are slidably connected inside the strip opening (85). The outside of the threaded column (82) is in contact with the close end of the two trapezoidal plates (86). The far ends of the two trapezoidal plates (86) are slidably connected inside the left and right ends of the sealing ring (84).

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