Safety power-off device for power construction

Abstract

The invention discloses a safe power-off device for power construction, and relates to the technical field of power construction, and the safe power-off device comprises a node control box and a far-end background, the node control box comprises a box body which is of a composite structure, and at least the inner layer of the box body is insulated; the number of the wiring terminals is multiple, at least one of the wiring terminals is an input terminal, multiple wiring terminals are output terminals, and any one input terminal and the multiple output terminals form a group and are distributed on the two sides of the box body respectively; the power-off mechanism comprises a power-off assembly and a controller connected with the power-off assembly; the controller is wirelessly connected to a far-end background, and the power-off assembly comprises a first power transmission assembly corresponding to the input terminal, a second power transmission assembly corresponding to the output terminal and a conduction assembly. According to the invention, economic loss can be reduced, power consumption of the masses can be improved, power construction can be safely powered off under more conditions, and the construction safety effect is guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of power construction, and particularly to a power construction safety power-off device. Background Art

[0002] During the process of power construction, for safety considerations, electricians and related workers often cut off the power to power facilities before carrying out construction operations. However, in daily life, workers sometimes also encounter various abnormal power construction requirements, such as:

[0003] The cables near power nodes (stations) are disconnected, damaged, or grounded due to human accidents or natural causes, resulting in regional electric shock risks, making it impossible for workers to go to the nodes (stations) to activate the switchgear for power-off according to the normal power construction process, and there is a need for live working.

[0004] It should be noted that the reason why the above does not trip directly like a household circuit breaker is that the above nodes do not supply power to a single household. If tripping randomly, it will affect regional production and other activities, and even cause more serious safety risks.

[0005] In this case, another current method is that after the workers know the situation, they review and confirm the power-off conditions and cut off the power from a higher-level node. However, this method will affect other originally normal power-using facilities, expand economic losses, and bring a bad power-using experience to other people. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] In order to reduce economic losses, improve people's power use, and enable power construction to be safely powered off in more cases to ensure construction safety, this application provides a power construction safety power-off device.

[0007] This application provides a power construction safety power-off device, adopting the following technical solution:

[0008] A power construction safety power-off device, characterized in that it includes a node control box and a remote background. The node control box includes:

[0009] A box body, which is a composite structure and at least the inner layer is insulated;

[0010] Terminal blocks, there are multiple of them, and at least one is an input terminal, and multiple are output terminals. Any one input terminal and multiple output terminals are grouped and distributed on both sides of the box body respectively;

[0011] A power-off mechanism, which includes a power-off component and a controller connected thereto;

[0012] The controller is wirelessly connected to a remote backend, the power-off component includes a power transmission component 1 corresponding to the input terminal, a power transmission component 2 corresponding to the output terminal, and a conduction component, the power transmission component 1 includes an iron core 1 and a conductive block 1, the iron core 1 is slidably connected to the box body and the sliding direction is parallel to the arrangement direction of the input terminal and the output terminal, the conductive block 1 is fixed to an end of the iron core 1 away from the input terminal and is used to contact the power transmission component 2;

[0013] If the current is not direct current, then: there is a group of wires on one of the iron cores 1, one of which is a transmission line A and the other is a magnetic force generating line B. One end of the transmission line A is connected to the input terminal, and the other end is connected to the conductive block 1; one end of the magnetic force generating line B is connected to the input terminal, and the other end is connected in series with a current limiting circuit and surrounds the iron core 1 and then connected to the neutral line; the number of transmission lines A on a certain iron core 1 is two and is used to match the neutral line;

[0014] There are several conducting components and if one corresponds to one iron core, then the conducting components include a telescopic unit, a valve group and an air box. There are two telescopic units and they are coaxially arranged inside and outside the box respectively. The two telescopic units are insulating liquid push structures and are connected to each other. The telescopic unit located inside the box is linked to the iron core. The movable part of the telescopic unit located outside the box can be magnetically attracted and the inner cavity of the movable part facing away from the input terminal side is connected to the outside. The air box covers the telescopic unit outside the box. The valve group is electrically connected to the controller and is used to control whether the inner cavity of the air box and the telescopic unit outside is connected to the outside.

[0015] Optionally, an insulating partition for separating each power-off component is provided in the box, and the second iron core is installed on the insulating partition;

[0016] The output component 2 includes a conductive block 2 connected to the output terminal by a wire, and the wire connecting the conductive block 2 and the output terminal bypasses the iron core 2;

[0017] A guide rail is arranged below the iron core 2, the guide rail is parallel to the iron core 1 and is slidably connected with a floating slider, the floating slider is located on both sides of the guide rail, one is conductive and the other is insulated, and the insulated part is below; the floating slider can float up and down along the guide rail, the guide rail is connected to the neutral line, and the upper part of the floating slider is connected in series with the magnetic force generating line B.

[0018] Optionally, the weight of the floating slider is not greater than the suction force generated by the iron core 2 when the output terminal side is not used according to the rated standard.

[0019] Optionally, a ceramic ring is disposed on an outer sleeve of the core, and the ceramic ring is mounted on the inner wall of the box;

[0020] The first power transmission component includes an insulating sheet, a conductive sheet, and a conductive bar. The insulating sheet is fixed to one end of the first iron core away from the second power transmission component. The conductive sheet is fixed on the insulating sheet. One end of the conductive bar is connected to the input terminal, and the other end abuts against the conductive sheet. One end of the power transmission line A is connected to the conductive sheet, and the other end is connected to the first conductive block.

[0021] Optionally, the second power transmission component includes a movable cylinder, a sliding rod, and a spring. The movable cylinder is coaxial with the first iron core, and a fixed ring is formed on the outer wall. The sliding rod is parallel to the movable cylinder, one end is fixed to the inner wall of the box body, and the other end penetrates through the fixed ring. The spring is sleeved on the movable cylinder, one end is fixed to the side of the fixed ring away from the first iron core, and the other end is fixed to the inner wall of the box body. The second conductive block is fixed to the end of the movable cylinder.

[0022] Optionally, the weight of the floating slider is less than the suction force generated by the second iron core when the output terminal side is used at the rated standard.

[0023] Optionally, the telescopic unit includes a cylinder body, a piston, and an insulating rod. The cylinder body is coaxial with the corresponding first iron core and fixed to the box body. The two cylinder bodies located inside and outside the box body are communicated with each other. The piston is slidably connected to the cylinder body. One end of the insulating rod is fixed to the piston, and the other end extends out of the corresponding cylinder body. An insulating liquid is filled between the two pistons. On the outer side of the piston located outside the box body, a magnetization plate is fixed.

[0024] Optionally, a corrugated pipe or a flexible insulating sleeve is sleeved on the insulating rod inside the box body. One end of the corrugated pipe or the flexible insulating sleeve is fixed to the insulating rod, and the other end is fixed to the cylinder body.

[0025] An insulating safety box is arranged inside the box body. The safety box covers the telescopic unit located inside the box body and is penetrated by the insulating rod.

[0026] Optionally, the diameter of the cylinder body located outside the box body is larger than the diameter of the cylinder body located inside the box body.

[0027] In summary, the present application includes the following beneficial technical effects:

[0028] 1. Workers can access the remote background through the terminal, and the remote control node controls the box to disconnect the circuit. There is no need to be restricted by the regional electric shock risk, and there is no need to cut off the power from the upper-level node. While reducing economic losses, it enables the power construction to be safely powered off in more cases, ensuring the safety of construction.

[0029] 2. Due to the unique setting of the first power transmission component and the conduction component, there is no need for manual intervention after power-on, and the closing and connection can be automatically completed by using the current in the circuit.

[0030] At the same time, the inside and outside of the box body are isolated. When there is a power-off requirement, although it is an external response, the controllable opening and power-off can be completed without direct structural intervention inside, with higher safety.

[0031] 3. The closing force is controlled on the output terminal side. Abnormalities on the output terminal side can directly cause the closing force to weaken or even disappear, reducing the difficulty of opening the circuit and cutting off the power inside the box without direct structural intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the present application;

[0033] Figure 2 is a schematic diagram of a partial structure of the present application;

[0034] Figure 3 is a schematic diagram of the structure on the insulating partition of the present application.

[0035] Description of reference numerals: 1. Box body; 11. Safety box; 12. Insulating partition; 121. Core two; 122. Guide rail; 123. Floating slider; 2. Wiring terminal; 3. Power transmission component one; 31. Core one; 32. Insulating block; 33. Conductive block one; 34. Ceramic ring; 35. Insulating sheet; 36. Conductive sheet; 37. Conductive bar; 4. Power transmission component two; 41. Moving cylinder; 42. Fixed ring; 43. Sliding rod; 44. Spring; 45. Conductive block two; 5. Conducting component; 51. Telescopic unit; 52. Valve group; 521. Electric control valve one; 522. Electric control valve two; 53. Air box; 6. Arc extinguishing chamber; 7. Conductive lead plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] The following further elaborates on the present application in conjunction with the Figures 1-3 drawings.

[0037] The embodiment of the present application discloses a power construction safety power-off device.

[0038] Referring to Figure 1 and Figure 2 , the power construction safety power-off device includes a node control box and a remote background. The node control box includes a box body 1 and a power-off mechanism. The remote background establishes a data connection with the node control box, enabling staff to remotely control power on and off.

[0039] The box body 1 is installed at the power node position. Examples of power nodes in this embodiment include the output bus areas of places such as power distribution rooms, laboratories, and construction sites. The box body 1 has a composite layer structure, with a high-temperature resistant insulating material on the inner layer and an alloy or other material on the outer layer.

[0040] In this attached drawing, in order to better show the internal structure of the box body 1, one side opening of the box body 1 is specially shown. In actual application, a box door needs to be installed at the opening of the box body 1 for closing. Wiring terminals 2 are respectively fixed on two opposite sides of the box body 1. Among them, there are multiple wiring terminals 2, at least one of which is used as an input terminal, and the other multiple are used as output terminals. Any one input terminal and multiple output terminals form a group, that is, one path to multiple paths, to supply power to multiple electrical and power transmission facilities. Therefore, by switching the on-off relationship of the input of any group of terminals, the on-off of local requirements can be realized; this embodiment takes one group in one box body as an example.

[0041] It should be noted that in this embodiment, for the live wire and the neutral wire, that is, the ground wire part can be temporarily not considered for the time being. The live wire and the neutral wire are grouped, and the wire and the line are used as a substitute without special explanation.

[0042] The power-off mechanism includes multiple power-off components and a controller connected to the power-off components. The power-off components are installed inside the box body 1. The current input end of the power-off component is interconnected with the input terminal, and the current output end of the power-off component is interconnected with the output terminal; the controller can be placed outside.

[0043] It can be understood that since it is considered that the external main wire usually connects multiple external branch wires, in other embodiments, the current input ends of different power-off components can be connected to the same wiring terminal 2, while the current output ends of the power-off components are connected to different wiring terminals 2. How to allocate specifically can be set according to the actual situation.

[0044] The remote background includes a server; the above-mentioned controller integrates a communication module and can be separately powered by a rechargeable battery to achieve an effect similar to that of a laptop computer. Usually, it is powered by a charging line; in the case of a power-off of the charging line, it can also be powered by the battery to ensure the use safety; the controller establishes a data connection relationship with the remote background through the communication module, so that when there is a regional electric shock risk near the power node, the staff can access the remote background and remotely send a specified control to cut off the power supply line of the power-off mechanism, reducing the electric shock risk and also reducing the situation of excessive influence of power-off at a higher level. The power-off component includes a first power transmission component 3, a second power transmission component 4, and a conduction component 5. The first power transmission component 3 and the second power transmission component 4 are both arranged inside the box body 1. The first power transmission component 3 and the second power transmission component 4 respectively correspond to the input terminal and the output terminal, and the conduction component 5 determines the on-off of the power.

[0045] The first power transmission component 3 includes a first iron core 31. The first iron core 31 is columnar, one end faces the input terminal side, and the other end faces the output terminal side; the first iron core 31 is installed in a sliding connection manner.

[0046] An iron core 31 leads out a group of wires from the terminal, with one wire serving as the power transmission line A and one wire serving as the magnetic force generating line B; the iron core 31 is provided with a through groove along its length direction, and the power transmission line A passes through the through groove and is insulated from the iron core 31, such as: insulating paint, insulating sleeve; the magnetic force generating line B is spirally wound around the iron core 31, and one end is connected to the power transmission line A corresponding to the live wire.

[0047] It should be noted that the number of the power transmission line A on a certain iron core 31 should be two, because the neutral wire needs to be considered, and in this embodiment, the neutral wire is not separately equipped with an iron core 31; in addition, the magnetic force generating line B corresponding to the live wire should be connected back to the neutral wire to form a loop.

[0048] In order to enable the iron core 31 to move, the iron core 31 needs to be supported. Therefore, an insulating and high-temperature-resistant ceramic ring 34 is sleeved outside the iron core 31. The ceramic ring 34 is fixedly connected to the upper inner wall of the box body 1 through bolts with a base. The ceramic ring 34 limits the iron core 31, so that the iron core 31 can move between the input terminal and the output terminal.

[0049] Since there are coils wound outside the iron core 31, in order to prevent the coils from interfering with the movement of the iron core 31 in the ceramic ring 34, the ceramic ring 34 is sleeved on a section of the iron core 31 far from the input terminal, and no coil is wound on the section of the iron core 31 far from the input terminal.

[0050] An insulating block 32 is fixed at one end of the iron core 31 far from the input terminal. A conductive block 33 is adhered to one side of the insulating block 32. In this embodiment, in order to reduce the interference of the iron core 31 on the conductive block 33, the size of the conductive block 33 is smaller than that of the insulating block 32, and the conductive block 33 is arranged on the side of the insulating block 32 facing away from the iron core 31.

[0051] It should be noted that the number of the conductive blocks 33 is the same as the number of the power transmission lines A, and they are connected in one-to-one correspondence for connecting the power transmission component two 4.

[0052] The power transmission component two 4 includes a moving cylinder 41, a sliding rod 43, and a spring 44. Among them, the moving cylinder 41 is coaxial with the iron core 31, and a fixed ring 42 is formed on the outer wall of the moving cylinder 41; the sliding rod 43 is parallel to the moving cylinder 41 and one end is fixed to the inner wall of the box body 1. There are multiple sliding rods 43 and they all penetrate the fixed ring 42 and are slidably connected to the fixed ring 42; that is, the moving cylinder 41 can horizontally move along the length direction of the sliding rod 43 through the fixed ring 42. In this embodiment, the moving cylinder 41, the fixed ring 42, and the sliding rod 43 are all made of non-conductive materials.

[0053] The spring 44 is sleeved at a position of the moving cylinder 41 far from the power transmission component one 3, and one end of the spring 44 is fixedly connected to the inner wall of the box body 1, and the other end is fixedly connected to the fixed ring 42.

[0054] One end of the moving cylinder 41 facing the power transmission component 3 is fixedly connected with a second conductive block 45 corresponding to the first conductive block 33. The second conductive block 45 is connected to the output terminal through a wire. The moving cylinder 41 is hollow, and the wire can be placed inside the cylinder and has enough allowance to meet the pulling when the moving cylinder 41 moves.

[0055] According to the above content, the first iron core 31 and the moving cylinder 41 move towards each other so that the first conductive block 33 and the second conductive block 45 are in contact, connecting the input terminal and the output terminal; the above-mentioned spring 44 is used to ensure the mutual contact of the first conductive block 33 and the second conductive block 45, and is also used to reduce the harm caused by the hard impact when the two move towards each other.

[0056] Because in actual use, it is impossible for the staff's hand to penetrate into the box body 1, so the following settings are made in this embodiment:

[0057] 1. Minimize the resistance encountered when the first iron core 31 moves without affecting the circuit conduction;

[0058] 2. Optimize the activation method of the power transmission component 3 to reduce manual intervention and the contact between the internal structure of the box and the outside world.

[0059] Specifically:

[0060] The power transmission component 3 further includes an insulating sheet 35, a conductive sheet 36 and a conductive bar 37. The insulating sheet 35 is fixedly connected to the end of the first iron core 31 away from the power transmission component 4. In this embodiment, the insulating sheet 35 is arranged in a long strip shape. One side of the insulating sheet 35 facing away from the first iron core 31 is fixedly connected with a horizontally arranged conductive sheet 36. In this embodiment, the size of the conductive sheet 36 is smaller than that of the insulating sheet 35. One end of the above-mentioned power transmission line A is connected to the conductive sheet 36, and the other end is connected to the first conductive block 33.

[0061] One end of the conductive bar 37 is fixedly connected to the input terminal, and the other end is bent to be in sliding connection with the conductive sheet 36 as a contact to ensure that the power transmission component 3 can be separated from the power transmission component 4 and the input terminal remains connected to the power transmission component 3 when it is conductive.

[0062] There can be multiple conduction components 5, corresponding to each first iron core 31 one by one, or one corresponding to multiple iron cores; in this embodiment, the former is selected as an example for illustration:

[0063] The conduction component 5 includes a telescopic unit 51. The telescopic unit 51 includes a cylinder block, a piston and an insulating rod. The cylinder block is coaxial with the corresponding first iron core 31 and one end is fixed to the box body 1. There are two telescopic units 51 which are respectively located inside and outside the box body 1, and a pipeline is connected between the two cylinder blocks; the piston is slidably connected to the cylinder block, the insulating rod is coaxially fixed to the piston and one end extends out of the cylinder block; inside the box body 1, at the end of the insulating rod of the telescopic unit 51 fixed to the first iron core 31; outside the box body 1, a magnetization plate (made of ferroalloy) is fixed on the outer side of the piston in the telescopic unit 51, and insulating oil is filled between the two pistons.

[0064] According to the above settings, after the input terminal and the output terminal are correspondingly connected to the circuit and powered on, the first power transmission component 3 generates an end-to-end directional magnetic field, magnetically attracting the outer piston to move towards the inner side of the box body 1. During the process, the outer piston squeezes the oil to drive the telescopic unit 51 located inside to push the first iron core 31 towards the output terminal, and the power transmission can be automatically completed and connected.

[0065] Although the above-mentioned telescopic unit 51 uses insulating oil, there is still a risk of leakage. In order to reduce potential safety hazards, a corrugated pipe and a flexible insulating sleeve are sleeved on the insulating rod inside the box body 1. The corrugated pipe is located outside the cylinder block, one end is fixed to the insulating rod, and the other end is fixed to the outer end face of the cylinder block. This setting reduces the risk of oil leakage and does not affect the movement of the insulating rod.

[0066] Although the above can realize automatic power-on and circuit connection, it still cannot realize power-off. Therefore, the following settings are made in this application:

[0067] The conduction component 5 further includes a valve group 52 and an air box 53. The air box 53 covers the telescopic unit 51 outside the box body 1. An air pipe 1 is fixed to the outer end of the telescopic unit 51 outside the box body 1. The air pipe 1 is sleeved outside the insulating rod and the insulating rod is provided with an air channel. One end of the air channel communicates with the cavity in the cylinder block away from the oil, and the other end penetrates through the outer end of the insulating rod. The wall plate of the air box 53 is provided with an air pipe 2 communicating inside and outside; the valve group 52 includes an electromagnetic valve 521 installed on the air pipe 1 and an electromagnetic valve 522 installed on the air pipe 2; the electromagnetic valve 521 and the electromagnetic valve 522 are respectively electrically connected to the controller.

[0068] After the circuit connection is completed when this application is powered on, the electromagnetic valve 521 is closed, and a small and convenient air pump is used to draw negative pressure on the air pipe 2, and then the electromagnetic valve 522 is closed; then the air pump can be retained and can be taken away.

[0069] When power-off is required for this application, the electromagnetic valve 521 is opened, and under the action of negative pressure, the outer piston is pulled away from the box body 1, and the corresponding piston inside the box body 1 moves synchronously and drives the first iron core 31 to move, so as to separate the first power transmission component 3 and the second power transmission component 4 to realize power-off.

[0070] It should be noted that the reason why other direct mechanisms are not adopted to intervene in the box body 1 in this application is that there is high voltage in the box body 1, and it is necessary to block it inside and outside, and try to reduce the probability of internal and external contact. Therefore, when necessary, an insulating safety box 11 can be further set. The safety box 11 covers the telescopic unit 51 located in the box body 1 and has an opening for the insulating rod to extend out.

[0071] Under the above settings, although the power-on can be automatically connected, when power-off is required, it has a strong dependence on negative pressure, and it is also necessary for it to counteract the magnetic force on the power transmission component 1-3. Therefore, in another embodiment of this application, the following settings are also made:

[0072] Refer to Figure 3 , an insulating partition 12 is fixed in the box body 1. On the one hand, the insulating partition 12 is used to separate each group of the first power transmission components 3 and the second power transmission components 4, and on the other hand, it serves as a foundation. A second iron core 121 is fixed on the insulating partition 12, and the wire connecting the second conductive block 45 and the output terminal is wound around the second iron core 121.

[0073] A conductive guide rail 122 is fixed below the second iron core 121. The guide rail 122 is parallel to the first iron core 31 and is slidably connected with a floating slider 123. The floating slider 123 is located below the second iron core 121 and can be magnetized. The floating slider 123 is horizontally divided into two parts, the upper part is conductive, and the lower part is insulating; the floating slider 123 can float along the thickness direction of the guide rail 122 to change whether the upper part contacts the guide rail 122; the guide rail 122 is connected to the zero line, and the upper part of the floating slider 123 is connected in series to the magnetic force generating line B.

[0074] During the use process: after the input terminal and the output terminal of this application are automatically connected when powered on, the second iron core 121 generates magnetic force to generate magnetic suction on the floating slider 123, making it:

[0075] 1), show a tendency to float upward, that is, the weight of the floating slider 123 is designed to be not greater than the suction force generated during normal power transmission (that is, rated standard use). Once there is a risk of direct grounding or leakage of the cable near the node, the current increases, the magnetic force is greater than the gravity of the floating slider 123, making it float upward, disconnecting the current outside the first iron core 31 and making it lose magnetic force, without hindering the subsequent power-off;

[0076] If the initial current is too large and the weight of the floating slider 123 is not easy to configure, a bypass can be led out from the wire on the second iron core 121 from the second conductive block 45, and then connected back to the output terminal after the bypass.

[0077] 2), floating directly upward, that is, setting the weight of the floating slider 123 to be less than the suction force generated during normal power transmission. Once the input terminal and the output terminal are connected, the iron core 31 fails and does not hinder subsequent power-off. It can be understood that since the valve group 52 is closed, the iron core 31 cannot move randomly towards the input terminal at least, and because there is a spring 44 to maintain the connected state.

[0078] It should be noted that current-limiting circuits can be connected in series to the bypasses of the above-mentioned iron core 31 and iron core 121, or even directly use current-limiting resistors to make the magnetic force modulation relatively appropriate and cause less interference to the original circuit.

[0079] In an embodiment of the present application, the diameter of the cylinder body located outside the box body 1 of the telescopic unit 51 is larger than the diameter of the cylinder body located inside the box body 1. This setting allows the iron core 31 to move a large distance with a small momentum of the piston magnetically attracted outside, more reliably meeting the design requirements for power-on and power-off inside the box body 1, and avoiding the situation where the disconnection occurs but the distance is too close to maintain conduction.

[0080] In another embodiment of the present application, an arc extinguishing chamber 6 is further provided inside the box body 1. Conductive lead plates 7 are led out from the arc extinguishing chamber 6, and two conductive lead plates 7 are in a group and respectively correspond to the first conductive block 33 and the second conductive block 45. The design of the arc extinguishing chamber 6 can reduce the duration and probability of high-temperature arcs when the first conductive block 33 and the second conductive block 45 are disconnected, and improve the service life of the product.

[0081] The arc extinguishing chamber in this embodiment can be a gas-blast arc extinguishing structure, that is, a structure with a gas-blast arc extinguishing chamber inside. This is prior art and will not be elaborated here.

[0082] The above are all preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A safe power-off device for electric power construction, characterized in that: It includes a node control box and a remote backend, and the node control box includes: A box (1) having a composite structure and at least an inner layer of insulation; A plurality of connection terminals (2), at least one of which is an input terminal and a plurality of which are output terminals, wherein any one input terminal and a plurality of output terminals form a group and are respectively distributed on both sides of the box (1); A power-off mechanism, comprising a power-off component and a controller connected thereto; The controller is wirelessly connected to a remote backend, the power-off component comprises a power transmission component 1 (3) corresponding to the input terminal, a power transmission component 2 (4) corresponding to the output terminal, and a conduction component (5), the power transmission component 1 (3) comprises an iron core 1 (31) and a conductive block 1 (33), the iron core 1 (31) is slidably connected to the box body (1) and the sliding direction is parallel to the arrangement direction of the input terminal and the output terminal, the conductive block 1 (33) is fixed to an end of the iron core 1 (31) away from the input terminal and is used to contact the power transmission component 2 (4); If the current is not direct current, then: there is a group of wires on one of the iron cores (31), one of which is a transmission line A and the other is a magnetic force generating line B. One end of the transmission line A is connected to the input terminal, and the other end is connected to the conductive block (33); one end of the magnetic force generating line B is connected to the input terminal, and the other end is connected in series with a current limiting circuit and surrounds the iron core (31) and then connected to the neutral line; the number of transmission lines A on a certain iron core (31) is two and is used to match the neutral line; There are a plurality of conduction components (5), and if one corresponds to one iron core (31), the conduction component (5) comprises a telescopic unit (51), a valve group (52) and an air box (53). There are two telescopic units (51) and they are coaxially arranged inside and outside the box (1), respectively. The two telescopic units (51) are insulating liquid push structures and are interconnected. The telescopic unit (51) inside the box (1) is linked to the iron core (31). The movable part of the telescopic unit (51) outside the box (1) can be magnetically attracted and the inner cavity of the movable part facing away from the input terminal is connected to the outside. The air box (53) covers the telescopic unit (51) outside the box (1). The valve group (52) is electrically connected to the controller and is used to control whether the inner cavity of the air box (53) and the telescopic unit (51) outside are connected to the outside.

2. The electric power construction safety power-off device according to claim 1 is characterized in that: An insulating partition (12) for separating the power-off components is arranged in the box body (1), and a second iron core (121) is mounted on the insulating partition (12); The output component 2 includes a conductive block 2 (45) connected to the output terminal by a wire, and the wire connecting the conductive block 2 (45) and the output terminal bypasses the iron core 2 (121); A guide rail (122) is arranged below the second iron core (121), the guide rail (122) is parallel to the first iron core (31) and is slidably connected with a floating slider (123), one of the parts of the floating slider (123) located on both sides of the guide rail (122) is conductive, and the other is insulated and the insulated part is located below; the floating slider (123) can float up and down along the guide rail (122), the guide rail (122) is connected to the neutral line, and the upper part of the floating slider (123) is connected in series with the magnetic force generating line B.

3. The electric power construction safety power-off device according to claim 2 is characterized in that: The weight of the floating slider (123) is not greater than the suction force generated by the second iron core (121) when the output terminal side is used at a non-rated standard.

4. The electric power construction safety power-off device according to claim 1, characterized in that: The outer shell of the iron core 1 (31) is provided with a ceramic ring (34), and the ceramic ring (34) is installed on the inner wall of the box body (1); The power transmission component 1 (3) comprises an insulating sheet (35), a conductive sheet (36) and a conductive strip (37); the insulating sheet (35) is fixed to one end of the iron core 1 (31) away from the power transmission component 2 (4); the conductive sheet (36) is fixed on the insulating sheet (35); one end of the conductive strip (37) is connected to the input terminal, and the other end abuts against the conductive sheet (36); one end of the transmission line A is connected to the conductive sheet (36), and the other end is connected to the conductive block 1 (33).

5. The electric power construction safety power-off device according to claim 2 is characterized in that: The second power transmission component (4) comprises a moving cylinder (41), a sliding rod (43) and two springs (44); the moving cylinder (41) is coaxial with the first iron core (31) and has a fixed ring (42) formed on its outer wall; the sliding rod (43) is parallel to the moving cylinder (41) and has one end fixed to the inner wall of the box body (1) and the other end penetrating the fixed ring (42); the second spring (44) is sleeved on the moving cylinder (41) and has one end fixed to the side of the fixed ring (42) away from the first iron core (31) and the other end fixed to the inner wall of the box body (1); the second conductive block (45) is fixed to the end of the moving cylinder (41).

6. The electric power construction safety power-off device according to claim 5, characterized in that: The weight of the floating slider (123) is smaller than the suction force generated by the second iron core (121) when the output terminal side is used at a rated standard.

7. The electric power construction safety power-off device according to claim 1, characterized in that: The telescopic unit (51) comprises a cylinder, a piston and an insulating rod; the cylinder is coaxial with the corresponding iron core (31) and is fixed to the box (1); the two cylinders located inside and outside the box (1) are connected to each other; the piston is slidably connected to the cylinder; one end of the insulating rod fixes the piston and the other end extends out of the corresponding cylinder; insulating liquid is filled between the two pistons; the magnetized plate is fixed on the outer side of the piston located outside the box (1).

8. The electric power construction safety power-off device according to claim 7, characterized in that: A corrugated tube or a flexible insulating sleeve is sleeved on the insulating rod in the box body (1), one end of the corrugated tube or the flexible insulating sleeve is fixed to the insulating rod, and the other end is fixed to the cylinder body; An insulating safety box (11) is arranged in the box body (1), and the safety box (11) covers the telescopic unit (51) located in the box body (1) and is penetrated by the insulating rod.

9. The electric power construction safety power-off device according to claim 7, characterized in that: The diameter of the cylinder located outside the casing (1) is greater than the diameter of the cylinder located inside the casing (1).

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