A power distribution network fault isolation device and method for a petrochemical plant
By designing a combination of an insulation box, a walking motor, conductive components, and a locking component, the problem of the insulating sleeve being unable to slide to the broken part when the wire breaks is solved, achieving all-round sealing and protection of the broken wire and preventing leakage accidents.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LIHUAYI LIJIN REFINING & CHEMICAL CO LTD
- Filing Date
- 2026-01-29
- Publication Date
- 2026-05-29
Smart Images
Figure CN122118570A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of power distribution network technology, specifically a fault isolation device and method for power distribution networks used in petrochemical plants. Background Technology
[0002] The petrochemical plant area power distribution network refers to the power distribution system within the petrochemical plant area, which is used to transmit electrical energy from power producers or transmission networks to various electrical equipment and buildings within the petrochemical plant area. Transmission lines are an important component of the urban power distribution network, through which high-voltage electrical energy is transmitted from power producers or transmission networks to substations within the petrochemical plant area.
[0003] Currently, when power lines in a power distribution network break due to accidents, leakage current occurs. The leaked current is conducted through the ground to surrounding areas, which can easily cause safety accidents. To address this, existing technology involves using an insulating sleeve to slide along the outside of the broken wire to the break point to protect against leakage. However, this leakage protection measure has the following drawbacks: Firstly, if the broken wire is too long and hangs on the ground, the insulating sleeve will be blocked by the ground and unable to continue sliding, preventing it from moving smoothly to the break point and thus failing to effectively isolate the leaked current. Secondly, if the broken wire is too short and hangs in the air, the insulating sleeve will slide directly off the outside of the wire, again failing to effectively isolate the leaked current. Summary of the Invention
[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a fault isolation device and method for power distribution networks in petrochemical plants.
[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A fault isolation device for power distribution networks in a petrochemical plant includes an insulating box, a traveling motor, conductive components, a power supply, a sealing component, and a locking component. The insulation box has two sets of through holes on its side wall for wires to pass through, and the bottom of the insulation box is equipped with wheels. The power supply, the conductive component, and the walking motor are installed at the bottom of the insulating box. When the wire breaks and falls to the ground, the conductive component enables electrical conduction between the power supply and the walking motor. The walking motor drives the walking wheels to rotate, while the insulating box slides downwards along the outside of the wire under the action of gravity. The sealing assembly and the locking assembly are disposed inside the insulation box. When the broken end of the wire moves into the insulation box, the sealing assembly is used to seal one of the through holes, and the locking assembly is used to lock the insulation box outside the wire.
[0006] As a further improvement of the present invention: a guide rail is fixedly provided at the bottom of the insulation box. The conductive component includes a conductive slider and a conductive block. The conductive slider slides in conjunction with the guide rail, the conductive block is fixedly installed at the bottom of the insulating box, and the conductive slider is connected to the power source and the conductive block is connected to the walking motor via wires.
[0007] As a further improvement of the present invention: magnets are provided on both the side of the conductive block facing the conductive slider and the side of the conductive slider facing the conductive block.
[0008] As a further improvement of the present invention: a support plate is fixedly provided on the upper part of the insulation box, an arc-shaped plate is fixedly provided on one side of the support plate, a support column is attached to the inner side of the arc-shaped plate, and the support column is fixedly installed on the pole or structure used to carry the wire.
[0009] As a further improvement of the present invention: the sealing assembly includes a rocker arm, a first elastic element, an insulating sealing plate, and a roller. One end of the swing arm is hinged to the inner wall of the insulation box, and the other end is rotatably connected to the roller. One end of the first elastic element is connected to the inner wall of the insulation box, and the other end is connected to the swing arm, which is used to provide elastic tension to the swing arm. The insulating sealing plate is fixedly installed on the side wall of the swing arm.
[0010] As a further improvement of the present invention: the locking assembly includes a positioning sleeve, a second elastic element, a first pressure plate, a second pressure plate, and a pressure rod. The positioning sleeve is fixedly installed on the inner top wall of the insulation box. The upper end of the pressure rod extends into the interior of the positioning sleeve, and the lower end extends below the positioning sleeve and is connected to the first pressure plate. One end of the second elastic element is connected to the bottom of the positioning sleeve, and the other end is connected to the first pressure plate. The second pressure plate is located below the first pressure plate, and the bottom of the second pressure plate is connected to the inner bottom wall of the insulation box through a support rod. The insulation box is also equipped with a limiting component. During the sliding of the insulation box along the outside of the wire, the limiting component is used to limit the pressure rod inside the positioning sleeve, so that the second elastic element is in a compressed state. After the broken end of the wire moves into the insulation box, the limiting component releases the limiting state of the pressure rod.
[0011] As a further improvement to the present invention: a locking hole is provided on the side wall of the pressure rod. The limiting assembly includes a rack, a gear, a third elastic element, a positioning rod, a top support sleeve, and a limiting plate. The positioning rod is fixedly installed on the inner top wall of the insulation box. The top support sleeve is movably sleeved on the outside of the lower end of the positioning rod. One end of the third elastic element is connected to the inner top wall of the insulation box, and the other end is connected to the top support sleeve, which provides elastic support to the top support sleeve, so that the lower end of the top support sleeve abuts against the swing rod. The gear is rotatably connected to the inner wall of the insulating box via a rotating shaft. Several toothed plates that mesh with the gear are fixedly provided on the side wall of the top support sleeve. The rack is meshed above the gear. One end of the limiting plate is connected to the rack, and the other end passes through the positioning sleeve and extends into the lock hole.
[0012] As a further improvement of the present invention: the rack is hollow inside, and a guide rod is movably inserted into the end of the rack away from the limiting piece, and the end of the guide rod away from the rack is fixedly connected to the inner wall of the insulation box.
[0013] As a further improvement of the present invention: the first elastic element, the second elastic element and the third elastic element are springs or metal sheets.
[0014] A method for fault isolation in a power distribution network in a petrochemical plant area, the method being implemented based on the aforementioned fault isolation device for a power distribution network in a petrochemical plant area, includes the following steps: When the wire breaks due to an accident, the insulation box slides downwards along the outside of the wire under the influence of gravity. The conductive component connects the power supply to the walking motor, which drives the walking wheels to rotate. If the broken wire is too short, it hangs suspended in the air and does not contact the ground. As the insulation box slides down along the outside of the wire, once the broken end of the wire moves into the insulation box through a set of through holes, the locking component locks the insulation box to the outside of the wire, and the sealing component seals the through holes. Conversely, if the broken wire is too long, the insulation box slides down along the outside of the wire and lands on the ground beforehand. Then, the rotating walking wheels move the insulation box along the ground. During the movement, the insulation box moves relative to the part of the wire that is on the ground until the broken end of the wire moves into the insulation box through a set of through holes. Then, the locking component locks the insulation box to the outside of the wire, and the sealing component seals the through holes.
[0015] Compared with the prior art, the beneficial effects of the present invention are: In this embodiment of the invention, when the wire is not broken and is working normally, the wire is in a relatively horizontal state. At this time, the wire passes through two sets of through holes in the insulation box, and the insulation box is hung outside the wire. When the wire breaks due to an accident, the broken wire hangs towards the ground. At this time, the insulation box slides downward along the outside of the wire due to gravity. Simultaneously, the conductive component connects the power supply to the walking motor, and the walking motor drives the walking wheels to rotate. At this time, if the broken wire is too short, the wire will be suspended in the air and will not contact the ground. As the insulation box slides down the outside of the wire, when the broken end of the wire moves into the inside of the insulation box through one set of through holes, the locking component locks the insulation box outside the wire, thereby preventing the insulation box from completely sliding off the wire. At the same time, the sealing component seals the through holes. At this time, the insulation box and the sealing component seal the wire in the suspended state. The broken end of the wire in its empty state is completely insulated to prevent current leakage and thus prevent leakage accidents. Conversely, if the broken wire is too long, part of it will fall to the ground when it falls. As the insulation box slides down the outside of the wire, it will first land on the ground. Then, with the help of rotating wheels, the insulation box moves along the ground. During the movement, the insulation box moves relative to the part of the wire that has fallen to the ground until the broken end of the wire moves into the insulation box through a set of through holes. At the same time, the locking component locks the insulation box to the outside of the wire, and the sealing component seals the through holes. At this point, the insulation box and the sealing component can also completely insulate the broken end of the wire that has fallen to the ground. Compared with the existing technology, it is not affected by the length of the broken wire and can effectively protect against leakage of broken wires, with the advantage of good protection effect. Attached Figure Description
[0016] Figure 1 A schematic diagram of the structure of a power distribution network fault isolation device for petrochemical plant areas. Figure 1 ; Figure 2 A schematic diagram of the structure of a power distribution network fault isolation device for petrochemical plant areas. Figure 2 ; Figure 3 This is a schematic diagram of the internal structure of an insulation box in a power distribution network fault isolation device used in a petrochemical plant. Figure 1 ; Figure 4 This is a schematic diagram of the internal structure of an insulation box in a power distribution network fault isolation device used in a petrochemical plant. Figure 2 ; Figure 5 This is a schematic diagram of the pressure bar structure in a power distribution network fault isolation device used in a petrochemical plant area. Figure 6 for Figure 2 Enlarged view of region A in the middle; Figure 7 for Figure 3 Enlarged view of region B in the middle; Figure 8 for Figure 4 Enlarged diagram of region C in the middle; In the diagram: 10-Insulation box, 101-Support plate, 102-Arc-shaped shell, 103-Walking wheel, 104-Guide rail, 20-Support column, 30-Walking motor, 40-Conductive component, 401-Conductive slider, 402-Conductive block, 50-Power supply, 60-Sealing component, 601-Swing rod, 602-First elastic element, 603-Insulating sealing plate, 604-Roller, 70-Locking component, 701-Positioning sleeve, 702-Second elastic element, 703-First pressure plate, 704-Second pressure plate, 705-Support rod, 706-Pressure rod, 707-Lock hole, 80-Limiting component, 801-Rotating shaft, 802-Rack, 803-Gear, 804-Third elastic element, 805-Positioning rod, 806-Gear plate, 807-Top support sleeve, 808-Guide rod, 809-Limiting plate. Detailed Implementation
[0017] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.
[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0019] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0021] Please see Figure 1 , Figure 2 as well as Figure 3This embodiment provides a fault isolation device for power distribution networks in a petrochemical plant, including an insulating box 10, a traveling motor 30, a conductive component 40, a power supply 50, a sealing component 60, and a locking component 70. The insulating box 10 has two sets of through holes (not shown in the figure) on its side wall for wires to pass through. A traveling wheel 103 is provided at the bottom of the insulating box 10. The power supply 50, the conductive component 40, and the traveling motor 30 are installed at the bottom of the insulating box 10. When a wire breaks and falls to the ground, the conductive component 40 enables electrical conduction between the power supply 50 and the traveling motor 30. The traveling motor 30 drives the traveling wheel 103 to rotate, and simultaneously, the insulating box 10 slides downwards along the outside of the wire under gravity. The sealing component 60 and the locking component 70 are located inside the insulating box 10. When the broken end of the wire moves into the insulating box 10, the sealing component 60 seals one set of the through holes, and the locking component 70 locks the insulating box 10 outside the wire.
[0022] When the wire is not broken and is operating normally, it is in a relatively horizontal state. The wire passes through the two sets of through holes in the insulation box 10, which hangs outside the wire. When the wire breaks due to an accident, the broken wire hangs towards the ground. At this time, the insulation box 10 slides downwards along the outside of the wire due to gravity. Simultaneously, the conductive component 40 connects the power supply 50 to the walking motor 30, which drives the walking wheel 103 to rotate. If the broken wire is too short, it will be suspended in the air and not in contact with the ground. As the insulation box 10 slides down along the outside of the wire, once the broken end of the wire moves into the insulation box 10 through one set of through holes, the locking component 70 locks the insulation box 10 outside the wire, preventing it from completely sliding away. Simultaneously, the sealing component 60 seals the through holes. In the first case, the insulation box 10 and sealing component 60 completely insulate the broken end of the suspended wire to prevent current leakage and thus prevent leakage accidents. Conversely, if the broken wire is too long, part of the wire will fall to the ground when it falls. As the insulation box 10 slides down the outside of the wire, it will first fall to the ground. Then, the rotating wheels 103 will make the insulation box 10 move along the ground. During the movement, the insulation box 10 moves relative to the part of the wire that has fallen to the ground until the broken end of the wire is moved into the insulation box 10 through a set of through holes. Then, the locking component 70 locks the insulation box 10 to the outside of the wire, and the sealing component 60 seals the through holes. At this time, the insulation box 10 and sealing component 60 can also completely insulate the broken end of the wire that has fallen to the ground.
[0023] Please see Figure 6 In one embodiment, a guide rail 104 is fixedly provided at the bottom of the insulation box 10, and the conductive component 40 includes a conductive slider 401 and a conductive block 402. The conductive slider 401 is slidably engaged with the guide rail 104, and the conductive block 402 is fixedly provided at the bottom of the insulation box 10. The conductive slider 401 is connected to the power supply 50 and the conductive block 402 is connected to the walking motor 30 through wires.
[0024] When the wire is intact, the insulation box 10 is mounted on the outside of the wire. At this time, the conductive slider 401 is located away from the conductive block 402, and there is no contact between the conductive slider 401 and the conductive block 402. When the wire breaks accidentally and falls, the insulation box 10 tilts due to the fall of the wire, which in turn causes the conductive slider 401 to tilt. The tilted conductive slider 401 slides along the guide rail 104 and comes into contact with the conductive block 402. At this time, the power supply 50 supplies power to the walking motor 30 through the conductive slider 401, the conductive block 402 and the corresponding wires. The walking motor 30 drives the walking wheel 103 to rotate, so that after the insulation box 10 falls to the ground, the walking wheel 103 can drive the insulation box 10 to walk along the ground, thereby bringing the broken end of the excessively long wire into the insulation box 10, thus achieving leakage protection for the wire.
[0025] In one embodiment, magnets (not shown in the figure) are provided on both the side of the conductive block 402 facing the conductive slider 401 and the side of the conductive slider 401 facing the conductive block 402.
[0026] When the wire is not broken, the conductive slider 401 is located away from the conductive block 402. The two sets of magnets are too far apart to generate an attraction. When the insulation box 10 is tilted so that the conductive slider 401 comes into contact with the conductive block 402, the attraction between the two sets of magnets can achieve a tight connection between the conductive slider 401 and the conductive block 402. This makes it difficult for the conductive slider 401 to separate from the conductive block 402 after contact, thereby ensuring that the power supply 50 can continuously and stably supply power to the walking motor 30. This ensures that the insulation box 10 can move smoothly along the ground and successfully put the broken end of the wire into the insulation box 10.
[0027] Please see Figure 1 In one embodiment, a support plate 101 is fixedly installed on the upper part of the insulation box 10, an arc-shaped plate 102 is fixedly installed on one side of the support plate 101, and a support column 20 is attached to the inner side of the arc-shaped plate 102. The support column 20 is fixedly installed on a pole or structure for carrying wires.
[0028] When the wire is not broken, it is in a relatively horizontal state. At this time, the arc plate 102 covers the outside of the support column 20. The support column 20 can provide certain support for the insulation box 10, thereby reducing the pressure exerted by the insulation box 10 on the wire. When the wire breaks due to an accident, the broken wire falls downward and drives the insulation box 10 to rotate. When the insulation box 10 rotates, the support plate 101 drives the arc plate 102 to rotate around the support column 20. When the arc plate 102 rotates at a certain angle, the insulation box 10 can slide down along the wire, and the arc plate 102 automatically detaches from the outside of the support column 20.
[0029] Please see Figure 3 as well as Figure 4 In one embodiment, the sealing assembly 60 includes a rocker arm 601, a first elastic element 602, an insulating sealing plate 603, and a roller 604. One end of the rocker arm 601 is hinged to the inner wall of the insulating box 10, and the other end is rotatably connected to the roller 604. One end of the first elastic element 602 is connected to the inner wall of the insulating box 10, and the other end is connected to the rocker arm 601, for providing elastic tension to the rocker arm 601. The insulating sealing plate 603 is fixedly disposed on the side wall of the rocker arm 601.
[0030] When the wire passes through the insulation box 10 through the two sets of through holes, the swing rod 601 is in an inclined state, the first elastic element 602 is in a stretched state, and the roller 604 acts on the side wall of the wire. When the wire breaks and droops, causing the insulation box 10 to slide down along the outside of the wire, the roller 604 rolls adaptively along the outer wall of the wire. When the broken end of the wire moves into the interior of the insulation box 10 through one of the sets of through holes, the roller 604 is removed from the outside of the wire. At this time, the first elastic element 602 pulls the swing rod 601, causing the swing rod 601 to rotate relative to the inner wall of the insulation box 10, thereby driving the insulating sealing plate 603 to rotate, so that the insulating sealing plate 603 is in contact with the inner wall of the insulation box 10, thereby sealing the set of through holes and preventing current leakage from the through holes.
[0031] Please see Figure 3 , Figure 4 as well as Figure 5In one embodiment, the locking assembly 70 includes a positioning sleeve 701, a second elastic element 702, a first pressure plate 703, a second pressure plate 704, and a pressure rod 706. The positioning sleeve 701 is fixedly installed on the inner top wall of the insulation box 10. The upper end of the pressure rod 706 extends into the interior of the positioning sleeve 701, and the lower end extends below the positioning sleeve 701 and is connected to the first pressure plate 703. One end of the second elastic element 702 is connected to the bottom of the positioning sleeve 702, and the other end is connected to the first pressure plate 703. The second pressure plate 704 is disposed below the first pressure plate 703, and the bottom of the second pressure plate 704 is supported by a support rod 705. Connected to the inner bottom wall of the insulation box 10, the insulation box 10 is also provided with a limiting component 80. During the sliding of the insulation box 10 along the outside of the wire, the limiting component 80 is used to limit the pressure rod 706 inside the positioning sleeve 701, so that the second elastic member 702 is in a compressed state. After the broken end of the wire moves into the insulation box 10, the limiting component 80 releases the limiting state of the pressure rod 706, so that the second elastic member 702 can push the first pressure plate 701 to move downward, thereby pressing the wire against the upper part of the second pressure plate 704, realizing the locking between the insulation box 10 and the wire, so that the broken end of the wire remains inside the insulation box 10.
[0032] Please see Figure 5 , Figure 7 as well as Figure 8 In one embodiment, a locking hole 707 is provided on the side wall of the pressure rod 706. The limiting assembly 80 includes a rack 802, a gear 803, a third elastic element 804, a positioning rod 805, a top support sleeve 807, and a limiting piece 809. The positioning rod 805 is fixedly installed on the inner top wall of the insulation box 10. The top support sleeve 807 is movably sleeved on the lower end of the positioning rod 805. One end of the third elastic element 804 is connected to the inner top wall of the insulation box 10, and the other end is connected to the top support sleeve 807. The top support sleeve 807 is used to provide elastic support, so that the lower end of the top support sleeve 807 abuts against the rocker arm 601. The gear 803 is rotatably connected to the inner wall of the insulating box 10 through the rotating shaft 801. A plurality of toothed pieces 806 that mesh with the gear 803 are fixedly provided on the side wall of the top support sleeve 807. The rack 802 is meshed above the gear 803. One end of the limiting piece 809 is connected to the rack 802, and the other end passes through the positioning sleeve 701 and extends into the lock hole 707.
[0033] As the insulation box 10 slides down along the outside of the wire, the limiting piece 809 extends into the locking hole 707, thereby locking the pressure rod 706 inside the positioning sleeve 701. This compresses the second elastic element 702, causing the first pressure plate 703 to remain above the wire without contacting it, thus ensuring that the insulation box 10 can slide smoothly along the outside of the wire. When the broken end of the wire moves into the insulation box 10, the first elastic element 602 pulls the swing rod 601, causing the swing rod 601 to rotate relative to the inner wall of the insulation box 10. During the rotation of the swing rod 601, the third elastic element 804 pushes the top support sleeve 807 downward along the outside of the positioning rod 805. This causes several toothed plates 806 to move downwards. When the toothed plates 806 move downwards, they mesh with the gear 803, causing the gear 803 to rotate. When the gear 803 rotates, it meshes with the rack 802, causing the rack 802 to move. When the rack 802 moves, it causes the limiting plate 809 to move, so that one end of the limiting plate 809 moves out of the lock hole 707, thereby releasing the restriction of the pressure rod 706. At this time, the second elastic element 702 pushes the first pressure plate 703 downwards, thereby pressing the wire tightly on the upper part of the second pressure plate 704, thereby locking the insulation box 10 outside the wire to cover the broken end of the wire and realize the leakage protection of the wire.
[0034] Please see Figure 7 In one embodiment, the rack 802 is hollow inside, and a guide rod 808 is movably inserted into the end of the rack 802 away from the limiting piece 809. The end of the guide rod 808 away from the rack 802 is fixedly connected to the inner wall of the insulation box 10.
[0035] Through the movable cooperation between the guide rod 808 and the rack 802, when several toothed pieces 806 move down and drive the gear 803 to rotate, the gear 803 can smoothly drive the rack 802 to move, thereby successfully taking one end of the limiting piece 809 out of the lock hole 707.
[0036] In one embodiment, the first elastic element 602, the second elastic element 702, and the third elastic element 804 can be springs or metal sheets, and there is no limitation here.
[0037] In one embodiment, a method for fault isolation in a power distribution network used in a petrochemical plant area is provided, the method comprising the following steps: When the wire breaks due to an accident, the insulation box 10 slides downwards along the outside of the wire due to gravity. The conductive component 40 connects the power supply 50 to the walking motor 30, which in turn drives the walking wheel 103 to rotate. At this time, if the broken wire is too short, it will hang in the air and not contact the ground. As the insulation box 10 slides down along the outside of the wire, once the broken end of the wire moves into the insulation box 10 through a set of through holes, the locking component 70 locks the insulation box 10 to the wire. Externally, the sealing assembly 60 seals the set of through holes; conversely, if the broken wire is too long, the insulation box 10 slides down the outside of the wire and falls to the ground beforehand. Then, the rotating wheels 103 make the insulation box 10 move along the ground. During the movement, the insulation box 10 moves relative to the part of the wire that has fallen to the ground until the broken end of the wire moves into the interior of the insulation box 10 through a set of through holes. Then, the locking assembly 70 locks the insulation box 10 to the outside of the wire, and the sealing assembly 60 seals the set of through holes.
[0038] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A fault isolation device for power distribution networks in a petrochemical plant area, characterized in that, It includes an insulation box (10), a walking motor (30), a conductive component (40), a power supply (50), a sealing component (60), and a locking component (70). The insulation box (10) has two sets of through holes on its side wall for wires to pass through, and the bottom of the insulation box (10) is provided with wheels (103). The power supply (50), the conductive component (40), and the walking motor (30) are installed at the bottom of the insulating box (10). When the wire breaks and falls to the ground, the conductive component (40) enables electrical conduction between the power supply (50) and the walking motor (30). The walking motor (30) drives the walking wheel (103) to rotate, and at the same time, the insulating box (10) slides downward along the outside of the wire under the action of gravity. The sealing assembly (60) and the locking assembly (70) are disposed inside the insulation box (10). When the broken end of the wire moves into the insulation box (10), the sealing assembly (60) is used to seal one of the through holes, and the locking assembly (70) is used to lock the insulation box (10) outside the wire.
2. The fault isolation device for power distribution networks in a petrochemical plant area according to claim 1, characterized in that, The bottom of the insulation box (10) is fixedly provided with a guide rail (104). The conductive component (40) includes a conductive slider (401) and a conductive block (402). The conductive slider (401) slides in cooperation with the guide rail (104), the conductive block (402) is fixedly installed at the bottom of the insulating box (10), and the conductive slider (401) is connected to the power supply (50) and the conductive block (402) is connected to the walking motor (30) by wires.
3. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 2, characterized in that, Magnets are provided on both the side of the conductive block (402) facing the conductive slider (401) and the side of the conductive slider (401) facing the conductive block (402).
4. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 1, characterized in that, The upper part of the insulation box (10) is fixedly provided with a support plate (101), and an arc plate (102) is fixedly provided on one side of the support plate (101). A support column (20) is attached to the inner side of the arc plate (102), and the support column (20) is fixedly installed on the pole or structure used to carry the wire.
5. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 1, characterized in that, The sealing assembly (60) includes a rocker arm (601), a first elastic element (602), an insulating sealing plate (603), and a roller (604). One end of the swing rod (601) is hinged to the inner wall of the insulation box (10), and the other end is rotatably connected to the roller (604). One end of the first elastic element (602) is connected to the inner wall of the insulation box (10), and the other end is connected to the swing rod (601), which is used to provide elastic tension to the swing rod (601). The insulating sealing plate (603) is fixedly installed on the side wall of the swing rod (601).
6. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 5, characterized in that, The locking assembly (70) includes a positioning sleeve (701), a second elastic element (702), a first pressure plate (703), a second pressure plate (704), and a pressure rod (706). The positioning sleeve (701) is fixedly installed on the inner top wall of the insulation box (10). The upper end of the pressure rod (706) extends into the interior of the positioning sleeve (701), and the lower end extends below the positioning sleeve (701) and is connected to the first pressure plate (703). One end of the second elastic element (702) is connected to the bottom of the positioning sleeve (702), and the other end is connected to the first pressure plate (703). The second pressure plate (704) is located below the first pressure plate (703), and the bottom of the second pressure plate (704) is connected to the inner bottom wall of the insulation box (10) through a support rod (705). The insulation box (10) is also provided with a limiting component (80). During the sliding of the insulation box (10) along the outside of the wire, the limiting component (80) is used to limit the pressure rod (706) inside the positioning sleeve (701), so that the second elastic element (702) is in a compressed state. After the broken end of the wire moves into the insulation box (10), the limiting component (80) releases the limiting state of the pressure rod (706).
7. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 6, characterized in that, A locking hole (707) is provided on the side wall of the pressure rod (706). The limiting component (80) includes a rack (802), a gear (803), a third elastic element (804), a positioning rod (805), a top support sleeve (807), and a limiting piece (809). The positioning rod (805) is fixedly installed on the inner top wall of the insulation box (10). The top support sleeve (807) is movably sleeved on the lower outside of the positioning rod (805). One end of the third elastic element (804) is connected to the inner top wall of the insulation box (10), and the other end is connected to the top support sleeve (807), which provides elastic support for the top support sleeve (807) so that the lower end of the top support sleeve (807) abuts against the swing rod (601). The gear (803) is rotatably connected to the inner wall of the insulating box (10) via a rotating shaft (801). A plurality of toothed plates (806) that mesh with the gear (803) are fixedly provided on the side wall of the top support sleeve (807). The rack (802) is meshed above the gear (803). One end of the limiting plate (809) is connected to the rack (802), and the other end passes through the positioning sleeve (701) and extends into the lock hole (707).
8. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 7, characterized in that, The rack (802) is hollow inside. A guide rod (808) is movably inserted into the end of the rack (802) away from the limiting piece (809). The end of the guide rod (808) away from the rack (802) is fixedly connected to the inner wall of the insulation box (10).
9. A fault isolation device for power distribution networks in a petrochemical plant area according to claim 7, characterized in that, The first elastic element (602), the second elastic element (702), and the third elastic element (804) are springs or metal sheets.
10. A method for fault isolation in a power distribution network used in a petrochemical plant, characterized in that, The method is implemented based on the fault isolation device for power distribution networks in petrochemical plants according to any one of claims 1-9, and includes the following steps: When the wire breaks due to an accident, the insulation box (10) slides downward along the outside of the wire due to gravity. The conductive component (40) connects the power supply (50) to the walking motor (30), and the walking motor (30) drives the walking wheel (103) to rotate. At this time, if the broken wire is too short, the wire will be suspended in the air and will not contact the ground. As the insulation box (10) slides down along the outside of the wire, when the broken end of the wire moves into the insulation box (10) through a set of through holes, the locking component (70) locks the insulation box (10) in place. Outside the wire, the sealing assembly (60) seals the set of through holes; conversely, if the broken wire is too long, the insulation box (10) slides down the outside of the wire and falls to the ground beforehand. Then, the insulation box (10) moves along the ground by means of the rotating wheels (103). During the movement of the insulation box (10), it moves relative to the part of the wire that has fallen to the ground until the broken end of the wire moves into the interior of the insulation box (10) through a set of through holes on the insulation box (10). Then, the locking assembly (70) locks the insulation box (10) to the outside of the wire and seals the set of through holes by the sealing assembly (60).