A live detection device and method for the bus of a high-voltage switchgear

Abstract

The present invention discloses a busbar live detection device for a high-voltage switch cabinet, comprising a cabinet body and a cabinet door hinged on the front end face of the cabinet body, a locking mechanism being provided on the upper side of the rear end face of the cabinet door, a driving mechanism being provided on the upper side of the locking mechanism, a transmission mechanism being provided at a position corresponding to the upper end face of the cabinet body and the driving mechanism, a warning mechanism being connected to the upper end of the transmission mechanism, and a battery pack being provided at a position corresponding to the upper end face of the cabinet body and the transmission mechanism; the locking mechanism comprises a lock block fixedly connected to the cabinet door, a lock groove being provided inside the lock block, a plug-in rod being movably connected inside the lock groove, a movable block in the driving mechanism being fitted with an inner wall of a sleeve, and the sleeve being made of ceramic material, the plug-in rod is driven downward by the driving mechanism to be plugged into the lock groove in the lock block in a conductive state of the busbar to lock the cabinet door, so that the cabinet door cannot be opened in a conductive state of the busbar, thereby avoiding the risk of electric shock when opened manually.

Description

Technical Field

[0001] The present invention relates to the field of switch cabinets, and in particular to a device and method for detecting live busbars in high-voltage switch cabinets. Background Art

[0002] High-voltage switchgear accounts for a large proportion of high-voltage equipment in power systems, especially those at 35kV and below within substations, and plays a vital role in the safe operation of power grids. Because high-voltage switchgear is fully enclosed equipment, some operators are not familiar with the equipment structure within the switchgear, leading to frequent high-voltage switchgear accidents in power systems, posing a significant risk to the personal safety of operators. Investigations and analysis have revealed that high-voltage switchgear accidents are often caused by operators mistakenly entering live compartments due to lack of knowledge of live parts.

[0003] The Chinese patent with the authorization announcement number CN205355544U specifically discloses a high-voltage switch cabinet live alarm system. When the busbar is energized, the live detection module is connected. If the cabinet door is pushed at this time, the cabinet door control module is connected, and the entire power supply is turned on, thereby energizing the alarm and sending an alarm signal to the operator. Opening the cabinet door when the busbar is energized will trigger the alarm, notifying the operator that the busbar is energized; entering the switch cabinet when the busbar is de-energized will not send an alarm signal. This ensures that the busbar is not energized when entering the switch cabinet, ensuring a safe and reliable working environment for the operator.

[0004] Although this high-voltage switch cabinet live alarm system can trigger the alarm by opening the cabinet door when the busbar is energized, since most high-voltage switch cabinets are used outdoors, once the alarm system circuit is damaged during long-term use, the alarm signal cannot be triggered in time to serve as a warning to the user, thereby posing a risk of electric shock.

[0005] To this end, a device and method for detecting busbar liveness in a high-voltage switchgear are proposed. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a high-voltage switch cabinet busbar live detection device and method, which can achieve.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A high-voltage switchgear busbar live detection device comprises a cabinet body and a cabinet door hinged to the front end face of the cabinet body, a locking mechanism is provided on the upper side of the rear end face of the cabinet door, a driving mechanism is provided on the upper side of the locking mechanism, a transmission mechanism is provided at a position corresponding to the driving mechanism on the upper end face of the cabinet body, a warning mechanism is connected to the upper end of the transmission mechanism, and a battery pack is provided at a position corresponding to the transmission mechanism on the upper end face of the cabinet body;

[0009] The locking mechanism includes a lock block fixedly connected to the cabinet door. A lock groove is formed inside the lock block, and a plugging rod is movably connected inside the lock groove. When the busbar is in a conductive state, the driving mechanism drives the plugging rod to move downward and plug into the lock groove in the lock block to lock the cabinet door, so that the cabinet door cannot be opened when the busbar is in a conductive state, avoiding the risk of electric shock caused by manual opening.

[0010] The driving mechanism includes a sleeve arranged above the plugging rod. An electromagnet is fixed at the upper end inside the sleeve. A movable block is movably connected to the lower side of the electromagnet. A connecting rod is fixed to the lower end of the movable block. The lower end of the connecting rod penetrates through the sleeve and extends to the lower end of the sleeve and is fixed to the plugging rod. The electromagnet is electrically connected to a power sensor arranged outside the busbar. A control module is arranged in the battery pack. When the busbar is electrified, the signal of the power sensor is fed back to the battery pack, and the battery pack conducts electricity for the electromagnet to generate a magnet. The lower movable block is magnetically repulsive to the electromagnet, and then moves downward in the sleeve to drive the connecting rod to control the locking mechanism to lock the cabinet door.

[0011] Preferably, the movable block in the driving mechanism fits with the inner wall of the sleeve, and the sleeve is made of ceramic material, and the movable block is made of magnetic metal.

[0012] Preferably, an activity groove is formed at the corresponding position of the upper end of the cabinet body and the middle part of the electromagnet. A rope is fixed to the upper end of the movable block. The electromagnet is an annular electromagnet, and the upper end of the rope extends through the middle part of the annular electromagnet and the activity groove to the upper end of the cabinet body.

[0013] Preferably, the transmission mechanism includes an upper sleeve fixed to the upper end of the cabinet body. A rotating rod is rotatably connected inside the upper sleeve. The upper end of the rope extends into the upper sleeve and is rotatably connected and fixed to the bottom of the rotating rod.

[0014] Preferably, the battery pack is located at the rear side of the upper sleeve, and a generator is fixed to the upper end of the battery pack. A gear is fixed to the upper end of the generator. Teeth are arranged at the corresponding position of the outer part of the rotating rod exposed outside the upper sleeve and the gear. The generator is in meshing transmission connection with the teeth on the outer part of the rotating rod through the gear .

[0015] Preferably, the warning mechanism includes fan blades fixed to the upper end of the rotating rod, and the number of the fan blades is at least six groups and is distributed equidistantly in a ring. The fan blades are designed with a hollow structure.

[0016] Preferably, sliding grooves are formed on both sides inside the fan blades. Sliders are slidably connected inside the sliding grooves. One end of each slider is fixed with a fixing plate. The middle part of the upper end of the fixing plate is fixed with a pulling rope. The pulling rope penetrates through the fan blade and extends into the transmission rod. One end of the pulling rope is fixed to the upper end of the movable rod. A pulley is rotatably connected at the penetrating part of the pulling rope and the fan blade.

[0017] Preferably, a warning piece is fixed to the lower side of the fixed plate and the inner bottom end of the fan blade. The fan blade is made of transparent plastic material, and convex lenses are fixed to both outer sides of the fan blade. The convex lenses are also made of plastic material.

[0018] A method for detecting live busbars of a high-voltage switchgear cabinet includes the following steps:

[0019] S1: When the busbar is live, the signal of the power sensor is fed back to the battery pack. The battery pack conducts electricity for the electromagnet to generate a magnet. The lower movable block repels the electromagnet magnetically, and then moves downward in the sleeve to drive the connecting rod to control the locking mechanism to lock the cabinet door;

[0020] S2: When the locking mechanism moves downward, it triggers the warning mechanism through the rope, the movable rod and the pull rope to show a warning sign to remind passers-by;

[0021] S3: Under normal conditions, the warning mechanism can generate electricity independently through the blowing of wind and cooperate with the transmission mechanism to store it in the battery pack;

[0022] S4: The power generation of the battery pack is independent of the power of the high-voltage switchgear cabinet itself, avoiding the situation that the circuit in the high-voltage switch fails to give a warning and lock the cabinet door due to a short circuit.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] (1) In this application, the driving mechanism drives the insertion rod to move downward and insert into the locking groove in the lock block to lock the cabinet door when the busbar is conductive, realizing that the cabinet door cannot be opened when the busbar is conductive and avoiding the risk of electric shock caused by manual opening;

[0025] (2) In this application, the transmission mechanism and the warning mechanism cooperate to generate electricity independently by wind power, so that the power supply of the locking mechanism is independent of the power system of the high-voltage switchgear cabinet itself, avoiding the situation that the locking mechanism and the warning mechanism can still operate independently after the circuit in the high-voltage switchgear cabinet is damaged;

[0026] (3) In this application, through the cooperation of the transmission mechanism, the locking mechanism and the warning mechanism, the warning mechanism can be triggered to operate when the locking mechanism operates, warning and reminding passers-by and staff. This warning method does not rely on light sources such as warning lights, so that the device is suitable for use in various harsh environments, with reduced limitations and greatly increased service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present invention;

[0028] Figure 2 is the overall structural sectional schematic diagram of the present invention;

[0029] Figure 3A schematic diagram of the structural locking block and the plug-in rod of the present invention;

[0030] Figure 4 For the present invention Figure 2 A in the middle is an enlarged schematic diagram;

[0031] Figure 5 For the present invention Figure 2 The enlarged schematic diagram of point B in the middle;

[0032] Figure 6 For the present invention Figure 2 The enlarged schematic diagram of point C in the middle;

[0033] Figure 7 It is a cross-sectional schematic diagram of the fan blade of the present invention.

[0034] Description of the numbers in the figure:

[0035] 1. Cabinet body; 2. Cabinet door; 4. Locking mechanism; 41. Lock block; 42. Lock slot; 43. Connecting rod; 5. Battery pack; 6. Driving mechanism; 61. Sleeve; 62. Movable block; 63. Connecting rod; 64. Spring; 65. Rope; 66. Electromagnet; 67. Movable slot; 7. Transmission mechanism; 71. Rotating rod; 72. Upper sleeve; 73. Movable rod; 74. Generator; 8. Warning mechanism; 81. Fixed plate; 82. Slide slot; 83. Slider; 84. Pull rope; 85. Pulley; 86. Warning plate; 87. Convex lens; 88. Fan blade. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0037] Example 1:

[0038] See also Figures 1 to 7 A high-voltage switch cabinet busbar live detection device includes a cabinet body 1 and a cabinet door 2 hinged to the front end surface of the cabinet body 1. A locking mechanism 4 is provided on the upper side of the rear end surface of the cabinet door 2. A driving mechanism 6 is provided on the upper side of the locking mechanism 4. A transmission mechanism 7 is provided at a position corresponding to the upper end surface of the cabinet body 1 and the driving mechanism 6. The upper end of the transmission mechanism 7 is connected to a warning mechanism 8. A battery pack 5 is provided at a position corresponding to the upper end surface of the cabinet body 1 and the transmission mechanism 7.

[0039] The locking mechanism 4 includes a lock block 41 fixedly connected to the cabinet door 2. A lock groove 42 is formed inside the lock block 41. A plugging rod 43 is movably connected inside the lock groove 42. When the busbar is in a conductive state, the driving mechanism 6 drives the plugging rod 43 to move downward and plug into the lock groove 42 in the lock block 41 to lock the cabinet door 2, so that the cabinet door 2 cannot be opened when the busbar is in a conductive state, avoiding the risk of electric shock caused by manual opening.

[0040] The driving mechanism 6 includes a sleeve 61 arranged above the plugging rod 43. An electromagnet 66 is fixed at the upper end inside the sleeve 61. A movable block 62 is movably connected to the lower side of the electromagnet 66. A connecting rod 63 is fixed to the lower end of the movable block 62. The lower end of the connecting rod 63 penetrates through the sleeve 61 and extends to the lower end of the sleeve 61 and is fixed to the plugging rod 43. The electromagnet 66 is electrically connected to a power sensor arranged outside the busbar. A control module is arranged in the battery pack 5. When the busbar is electrified, the signal of the power sensor is fed back to the battery pack 5. The battery pack 5 conducts electricity for the electromagnet 66 to generate a magnet. The lower movable block 62 is magnetically repulsive to the electromagnet 66, and then moves downward in the sleeve 61 to drive the connecting rod 63 to control the locking mechanism 4 to lock the cabinet door 2.

[0041] Specifically, the movable block 62 in the driving mechanism 6 fits with the inner wall of the sleeve 61, and the sleeve 61 is made of ceramic material. The movable block 62 is made of magnetic metal. An activity groove 67 is formed at the corresponding position of the upper end of the cabinet body 1 and the middle part of the electromagnet 66. A rope 65 is fixed to the upper end of the movable block 62. The electromagnet 66 is an annular electromagnet 66, and the upper end of the rope 65 extends to the upper end of the cabinet body 1 through the middle part of the annular electromagnet 66 and the activity groove 67. During operation, first, a power monitoring sensor for the installation head is installed on the busbar. When the sensor detects that the busbar is electrified, it can be fed back to the control module in the battery pack 5. The control module controls the electromagnet 66 located in the sleeve 61 to conduct electricity to generate magnetic force. Since the movable block 62 below the electromagnet 66 is also made of magnetic metal material, once the electromagnet 66 conducts electricity, the magnetic force between its lower end face and the movable block 62 is mutually repulsive, and then the movable block 62 is driven to move downward inside the sleeve 61 and compress the spring 64. Then, the connecting rod 63 connected to the movable block 62 moves downward, and the plugging rod 43 fixedly connected to the lower end of the connecting rod 63 moves downward synchronously. Since the plugging rod 43 corresponds to the lock groove 42 in the lower lock block 41, the plugging rod 43 is plugged inside the lock groove 42, and then the connection and fixation between the plugging rod 43 and the lock block 41 are realized. At this time, the cabinet door 2 fixed to the lock block 41 cannot be opened normally, thus avoiding the risk of electric shock caused by manually opening the cabinet door 2 during the energized state of the busbar.

[0042] Specifically, the transmission mechanism 7 includes an upper sleeve 72 fixed to the upper end of the cabinet 1, the interior of the upper sleeve 72 is rotatably connected to the rotating rod 71, the upper end of the rope 65 extends into the upper sleeve 72 and is rotatably connected and fixed to the bottom of the rotating rod 71, the battery pack 5 is located at the rear side of the upper sleeve 72, and the upper end of the battery pack 5 is fixed to a generator 74, the upper end of the generator 74 is fixed to a gear, the rotating rod 71 exposed outside the upper sleeve 72 is provided with teeth at the corresponding position of the gear, the generator 74 is connected to the gear through the teeth meshing with the external teeth of the rotating rod 71, and under normal use, the wind blows The warning mechanism 8 and the rotating rod 71 connected to the warning mechanism 8 are now rotated and connected in the upper sleeve 72, so the rotating rod 71 also rotates accordingly, and the generator 74 on the battery is connected to the rotating rod 71 through a gear meshing transmission, thereby driving the generator 74 to rotate for wind power generation, and the electricity is converted and stored in the battery. Compared with the prior art, this structure can independently generate wind power through the cooperation of the transmission mechanism 7 and the warning mechanism 8, so that the power supply of the locking mechanism 4 is independent of the high-voltage switchgear's own power system, thereby avoiding the high-voltage switchgear itself being able to independently operate the locking mechanism 4 and the warning mechanism 8 after the circuit is damaged.

[0043] Specifically, the warning mechanism 8 includes a fan blade 88 fixed to the upper end of the rotating rod 71, and the number of the fan blades 88 is at least six groups distributed in an annular manner at equal distances. The fan blade 88 is designed as a hollow structure, and a slide groove 82 is provided on both sides of the interior of the fan blade 88. The interior of the slide groove 82 is slidably connected with a slider 83, and one end of the slider 83 is fixed with a fixed plate 81, and a pull rope 84 is fixed to the middle part of the upper end of the fixed plate 81. The pull rope 84 passes through the fan blade 88 and extends to the inside of the transmission rod, and one end of the pull rope 84 is fixed to the upper end of the movable rod 73. The pull rope 84 and the fan blade 88 are rotatably connected with a pulley 85. A warning piece 86 is fixed to the lower side of the fixed plate 81 and the bottom end of the inner part of the fan blade 88. The fan blade 88 is made of transparent plastic material, and convex lenses 87 are fixed on both sides of the outside of the fan blade 88. The lens 87 is also made of plastic material. When the connecting rod 63 in the locking mechanism 4 moves downward, the rope 65 will be pulled downward. At this time, the movable rod 73 connected to the rope 65 will move downward synchronously in the rotating rod 71, and then the pull rope 84 connected to the upper end of the movable rod 73 will move downward, and the fixed plate 81 connected to the other end of the pull will move upward in the fan blade 88. At this time, the warning piece 86 in the folded state at the lower end of the fixed plate 81 will move upward and unfold. The convex lenses 87 fixed on both sides of the fan blade 88 will magnify the text on the warning piece 86 to remind passers-by or staff to pay attention to the current status of the high-voltage switch cabinet and operate with caution. Once the busbar is not in the energized state, the components will return to their original positions under the action of the spring 64, and the conductive state of the electromagnet 66 can also be controlled manually through the control module in the battery pack 5.

[0044] A method for detecting a live busbar of a high-voltage switch cabinet comprises the following steps:

[0045] S1: When working, first install the head power monitoring sensor on the busbar. When the sensor detects that the busbar is energized, it can be fed back to the control module in the battery pack 5. The control module controls the electromagnet 66 located in the sleeve 61 to conduct electricity and generate magnetic force. Since the movable block 62 on the lower side of the electromagnet 66 is also made of magnetic metal material, once the electromagnet 66 is conductive, its lower end surface and the magnetic repulsion of the movable block 62 drive the movable block 62 to move downward inside the sleeve 61 and compress the spring 64. Then the connecting rod 63 connected to the movable block 62 moves downward, and the plug-in rod 43 connected and fixed to the lower end of the connecting rod 63 moves downward synchronously. Since the plug-in rod 43 corresponds to the lock groove 42 in the lower lock block 41, the plug-in rod 43 is plugged into the lock groove 42, thereby realizing the connection and fixation of the plug-in rod 43 and the lock block 41. At this time, the cabinet door 2 fixed to the lock block 41 cannot be opened normally, thereby avoiding the risk of electric shock caused by manual opening of the cabinet door 2 when the busbar is energized;

[0046] S2: The locking mechanism 4 moves downwards, triggering the warning mechanism 8 to display a warning sign through the rope 65, the movable rod 73 and the pull rope 84 to alert passersby;

[0047] S3: Under normal use, the wind blows on the warning mechanism 8, and the rotating rod 71 connected to the warning mechanism 8 is rotated and connected in the upper sleeve 72, so the rotating rod 71 also rotates accordingly, and the generator 74 on the battery is meshed and connected with the rotating rod 71 through gears, thereby driving the generator 74 to rotate to generate wind power, and the electricity is converted and stored in the battery. Compared with the prior art, this structure can independently generate wind power through the cooperation of the transmission mechanism 7 and the warning mechanism 8, so that the power supply of the locking mechanism 4 is independent of the high-voltage switchgear itself power system, thereby preventing the locking mechanism 4 and the warning mechanism 8 from being able to operate independently after the circuit of the high-voltage switchgear itself is damaged;

[0048] S4: When the connecting rod 63 in the locking mechanism 4 moves downward, the rope 65 is pulled downward. At this time, the movable rod 73 connected to the rope 65 moves downward synchronously in the rotating rod 71, and then the pull rope 84 connected to the upper end of the movable rod 73 moves downward, and the fixed plate 81 connected to the other end of the pull moves upward in the fan blade 88. At this time, the warning piece 86 in the folded state at the lower end of the fixed plate 81 moves upward and unfolds. The convex lenses 87 fixed on both sides of the fan blade 88 magnify the text on the warning piece 86 to remind passers-by or staff to pay attention to the current state of the high-voltage switch cabinet and operate with caution. Once the busbar is not in the energized state, the components return to their original positions under the action of the spring 64, and the conductive state of the electromagnet 66 can be controlled manually through the control module in the battery pack 5.

[0049] The above are only the preferred specific embodiments of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved conceptions, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A live detection device for the busbar of a high-voltage switchgear, comprising a cabinet body (1) and a cabinet door (2) hinged to the front end face of the cabinet body (1), characterized in that: A locking mechanism (4) is provided on the upper side of the rear end face of the cabinet door (2). A driving mechanism (6) is provided above the locking mechanism (4). A transmission mechanism (7) is provided at a position corresponding to the driving mechanism (6) on the upper end face of the cabinet body (1). A warning mechanism (8) is drivingly connected to the upper end of the transmission mechanism (7). A battery pack (5) is provided at a position corresponding to the transmission mechanism (7) on the upper end face of the cabinet body (1); The locking mechanism (4) includes a lock block (41) fixedly connected to the cabinet door (2). A lock groove (42) is formed inside the lock block (41). A plugging rod (43) is movably connected inside the lock groove (42). When the busbar is in a conductive state, the driving mechanism (6) drives the plugging rod (43) to move downward and plug into the lock groove (42) in the lock block (41) to lock the cabinet door (2), so that the cabinet door (2) cannot be opened when the busbar is in a conductive state, avoiding the risk of electric shock caused by manual opening; The driving mechanism (6) includes a sleeve (61) provided above the plugging rod (43). An electromagnet (66) is fixed to the upper end inside the sleeve (61). A movable block (62) is movably connected to the lower side of the electromagnet (66). A connecting rod (63) is fixed to the lower end of the movable block (62). The lower end of the connecting rod (63) penetrates through the sleeve (61) and extends to the lower end of the sleeve (61) and is fixed to the plugging rod (43). The electromagnet (66) is electrically connected to a power sensor provided outside the busbar; A control module is provided in the battery pack (5). When the busbar is charged, the signal of the power sensor is fed back to the battery pack (5). The battery pack (5) conducts electricity for the electromagnet (66) to generate a magnet. The lower movable block (62) is magnetically repelled by the electromagnet (66), and then moves downward in the sleeve (61) to drive the connecting rod (63) to control the locking mechanism (4) to lock the cabinet door (2); The warning mechanism (8) includes fan blades (88) fixed to the upper end of a rotating rod (71), and the number of the fan blades (88) is at least six groups and is distributed annularly and equidistantly. The fan blades (88) are designed with a hollow structure; Sliding grooves (82) are formed on both sides inside the fan blades (88). Sliders (83) are slidably connected inside the sliding grooves (82). A fixing plate (81) is fixed to one end of each slider (83). A pulling rope (84) is fixed to the middle of the upper end of the fixing plate (81). The pulling rope (84) penetrates through the fan blades (88) and extends into the transmission rod. One end of the pulling rope (84) is fixed to the upper end of a movable rod (73). A pulley (85) is rotatably connected to the position where the pulling rope (84) penetrates through the fan blades (88).

2. The live detection device for the busbar of a high-voltage switchgear according to claim 1, wherein: The movable block (62) in the driving mechanism (6) fits with the inner wall of the sleeve (61), and the sleeve (61) is made of ceramic material. The movable block (62) is made of magnetic metal.

3. The live detection device for the busbar of a high-voltage switchgear according to claim 2, characterized in that: A movable groove (67) is provided at a position corresponding to the upper end of the cabinet (1) and the middle of the electromagnet (66); a rope (65) is fixed to the upper end of the movable block (62); the electromagnet (66) is an annular electromagnet (66), and the upper end of the rope (65) extends to the upper end of the cabinet (1) through the middle of the annular electromagnet (66) and the movable groove (67).

4. The live detection device for the busbar of a high-voltage switchgear according to claim 3, characterized in that: The transmission mechanism (7) comprises an upper sleeve (72) fixed to the upper end of the cabinet (1); the interior of the upper sleeve (72) is rotatably connected to a rotating rod (71); the upper end of the rope (65) extends into the upper sleeve (72) and is rotatably connected and fixed to the bottom of the rotating rod (71).

5. The live detection device for the busbar of a high-voltage switchgear according to claim 4, wherein: The battery pack (5) is located at the rear side of the upper sleeve (72), and a generator (74) is fixed to the upper end of the battery pack (5). A gear is fixed to the upper end of the generator (74). The rotating rod (71) exposed outside the upper sleeve (72) is provided with teeth at positions corresponding to the gear. The generator (74) is connected to the teeth on the outer side of the rotating rod (71) through meshing transmission.

6. A live detection device for the busbar of a high-voltage switchgear according to claim 1, characterized in that: A warning sheet (86) is fixed to the lower side of the fixing plate (81) and the inner bottom end of the fan blade (88). The fan blade (88) is made of a transparent plastic material, and convex lenses (87) are fixed on both sides of the outside of the fan blade (88). The convex lenses (87) are also made of a plastic material.

7. A live detection method for the busbar of a high-voltage switchgear applicable to any one of claims 1 to 6, characterized in that: The steps include: S1: When the busbar is energized, the power sensor signal is fed back to the battery pack (5), and the battery pack (5) is electrically conductive to generate a magnet for the electromagnet (66), and the lower movable block (62) and the electromagnet (66) are magnetically repelled, thereby moving downward in the sleeve (61) to drive the connecting rod (63) to control the locking mechanism (4) to lock the cabinet door (2); S2: The locking mechanism (4) moves downwards through the rope (65), the movable rod (73) and the pull rope (84) to trigger the warning mechanism (8) to display a warning sign to alert passersby; S3: Under normal conditions, the warning mechanism (8) rotates in conjunction with the transmission mechanism (7) under the influence of wind and can generate electricity autonomously and store it in the battery pack (5); S4: The energy generated by the battery pack (5) is independent of the power of the high-voltage switch cabinet itself, so as to avoid a short circuit in the high-voltage switch cabinet and prevent the cabinet door (2) from being locked due to a short circuit.

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