Electric power construction safety disconnect device

Abstract

This invention discloses a power outage safety device for power construction, relating to the field of power construction technology. It includes a node control box and a remote control unit. The node control box includes: a box body, which is a composite structure with at least an inner layer of insulation; multiple terminals, at least one of which is an input terminal, and multiple are output terminals, with any one input terminal and multiple output terminals forming a group distributed on both sides of the box body; and a power outage mechanism, including a power outage component and a controller connected thereto. The controller is wirelessly connected to the remote control unit. The power outage component includes a first transmission component corresponding to the input terminal, a second transmission component corresponding to the output terminal, and a conduction component. This application can reduce economic losses, improve public electricity supply, and enable safe power outages during power construction in more situations, thus ensuring construction safety.

Description

Technical Field

[0001] This application relates to the field of power construction technology, and in particular to a power construction safety power-off device. Background Technology

[0002] During electrical construction, for safety reasons, electricians and related personnel usually disconnect the power to the facilities before commencing work. However, in daily life, workers sometimes encounter various abnormal electrical construction needs, such as:

[0003] Cables near power nodes (sites) may be broken or damaged due to human error or natural causes, or cables may be grounded, posing a risk of electric shock in the area. This may prevent workers from following normal power construction procedures to reach the nodes (sites) to activate the power-off devices, thus requiring live-line work.

[0004] It is important to note that the reason why the above-mentioned nodes do not trip directly like household circuit breakers is because they are not supplying power to a single household. If they were to trip arbitrarily, it would affect regional production and other activities, and could even lead to more serious safety risks.

[0005] In such situations, another approach currently is for staff to verify the power outage conditions after being informed of the situation, and then cut off the power from a higher-level node. However, this approach can affect other normally functioning electrical facilities, increase economic losses, and provide a poor electricity experience for other users. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] In order to reduce economic losses, improve public electricity use, and ensure safe power outages during power construction in more situations, thereby guaranteeing construction safety, this application provides a power construction safety power outage device.

[0007] This application provides a power outage safety device for electrical construction, which adopts the following technical solution:

[0008] A power construction safety power-off device, characterized in that it includes a node control box and a remote control unit, wherein the node control box includes:

[0009] The enclosure is a composite structure and has at least an inner layer of insulation;

[0010] The wiring terminals include multiple terminals, at least one of which is an input terminal, and multiple terminals are output terminals. Any one input terminal and multiple output terminals are grouped together and distributed on both sides of the enclosure.

[0011] A power-off mechanism, comprising 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 one corresponding to the input terminal, a power transmission component two corresponding to the output terminal, and a conduction component. The power transmission component one includes an iron core one and a conductive block one. The iron core one is slidably connected to the housing and the sliding direction is parallel to the arrangement direction of the input terminal and the output terminal. The conductive block one is fixed to the end of the iron core one away from the input terminal and is used to contact the power transmission component two.

[0013] If the current is not direct current, then: one of the iron cores has a set of wires, one of which is a power transmission wire A and the other is a magnetic force generating wire B. One end of the power transmission wire A is connected to the input terminal and the other end is connected to the conductive block one; one end of the magnetic force generating wire B is connected to the input terminal, the other end is connected in series with a current limiting circuit and is connected to the neutral wire after wrapping around the iron core one; the number of power transmission wires A on a certain iron core one is two and they are used to match the neutral wire.

[0014] The conductive components are multiple, and if one corresponds to one iron core, the conductive components include a telescopic unit, a valve group, and an air box. There are two telescopic units, which are located inside and outside the box and are coaxially arranged. The two telescopic units are insulated liquid-push structures and are interconnected. The telescopic unit located inside the box is linked to the iron core. The movable part of the telescopic unit located outside the box is magnetically attracted, and the inner cavity of the movable part facing away from the input terminal 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, the housing is provided with an insulating partition for separating the various power-off components, and an iron core is installed on the insulating partition;

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

[0017] A guide rail is provided below the second iron core. The guide rail is parallel to the first iron core and is slidably connected to a floating slider. One part of the floating slider on each side of the guide rail is conductive, and the other part is insulated and is located below. The floating slider can float up and down along the guide rail. The guide rail is connected to the neutral wire, and a magnetic force generating wire B is connected in series at the top of the floating slider.

[0018] Optionally, the weight of the floating slider is not greater than the suction force generated by the iron core two when the output terminal side is used in a non-rated standard manner.

[0019] Optionally, a ceramic ring is provided on one side of the iron core, and the ceramic ring is installed on the inner wall of the box.

[0020] The first power transmission component includes an insulating sheet, a conductive sheet, and a conductive strip. The insulating sheet is fixed to the 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 strip 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 iron core and has a fixed ring formed on its outer wall. The sliding rod is parallel to the movable cylinder and has one end fixed to the inner wall of the housing, while the other end penetrates the fixed ring. The spring is sleeved on the movable cylinder and has one end fixed to the side of the fixed ring away from the iron core, while the other end is fixed to the inner wall of the housing. 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 core two when used at the output terminal side in the rated standard.

[0023] Optionally, the telescopic unit includes a cylinder, a piston, and an insulating rod. The cylinder is coaxial with the corresponding iron core and fixed to the housing. Two cylinders located inside and outside the housing are interconnected. The piston is slidably connected to the cylinder. One end of the insulating rod is fixed to the piston, and the other end extends out of the corresponding cylinder. The space between the two pistons is filled with insulating fluid. A magnetizing plate is fixed to the outer side of the piston located outside the housing.

[0024] Optionally, a corrugated tube or flexible insulating sleeve is fitted onto the insulating rod inside the housing, with one end of the corrugated tube or flexible insulating sleeve fixed to the insulating rod and the other end fixed to the cylinder body;

[0025] An insulated safety box is installed inside the box, which covers the telescopic unit located inside the box and is penetrated by an insulating rod.

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

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

[0028] 1. Staff can access the remote backend through the terminal to remotely control the node control box to disconnect the circuit. They are not limited by the regional electric shock risk, nor do they need to disconnect the power from the upper level node. This reduces economic losses and allows power construction to be safely disconnected in more situations, ensuring construction safety.

[0029] 2. Due to the unique design of the transmission and conduction components, no manual intervention is required after power-on; the circuit can be automatically closed using the current in the line.

[0030] Meanwhile, the enclosure is designed to isolate the inside from the outside, so when a power outage is required, although it is an external response, there is no direct structural intervention inside to complete the controllable tripping of the power supply, which is safer.

[0031] 3. The closing force is controlled on the output terminal side. An abnormality on the output terminal side can directly cause the closing force to weaken or even disappear, thereby reducing the difficulty of disconnecting the circuit breaker without direct structural intervention in the enclosure. Attached Figure Description

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

[0033] Figure 2 This is a partial structural diagram of this application;

[0034] Figure 3 This is a schematic diagram of the structure of the insulating partition in this application.

[0035] Explanation of reference numerals in the attached diagram: 1. Housing; 11. Safety box; 12. Insulating partition; 121. Iron core II; 122. Guide rail; 123. Floating slider; 2. Terminal block; 3. Power transmission assembly I; 31. Iron core I; 32. Insulating block; 33. Conductive block I; 34. Ceramic ring; 35. Insulating sheet; 36. Conductive sheet; 37. Conductive strip; 4. Power transmission assembly II; 41. Moving cylinder; 42. Fixed ring; 43. Sliding rod; 44. Spring; 45. Conductive block II; 5. Conducting assembly; 51. Telescopic unit; 52. Valve group; 521. Solenoid valve I; 522. Solenoid valve II; 53. Gas box; 6. Arc extinguishing chamber; 7. Conductive lead plate. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0037] This application discloses a power-off safety device for power construction.

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

[0039] The enclosure 1 is installed at the location of the power node. In this embodiment, the power node is an example of the output bus area in a power distribution room, laboratory, construction site, or other similar location. The enclosure 1 has a composite layer structure, with an inner layer of high-temperature resistant insulating material and an outer layer that can be an alloy or other material.

[0040] In this accompanying drawing, to better illustrate the internal structure of the enclosure 1, one side opening of the enclosure 1 is shown. In practical applications, a door needs to be installed at the opening of the enclosure 1 for closure. Wiring terminals 2 are fixed on opposite sides of the enclosure 1. There are multiple wiring terminals 2, at least one as an input terminal and the others as output terminals. Any input terminal and multiple output terminals form a group, i.e., one path to multiple paths, supplying power to multiple electrical devices. Therefore, switching the on / off relationship of any group of terminals can achieve localized power supply needs. This embodiment uses one enclosure as an example.

[0041] It should be noted that this embodiment focuses on the live wire and neutral wire. That is, the ground wire is temporarily disregarded. The live wire and neutral wire are grouped together and referred to as cables or lines without further 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 housing 1. The current input terminal of the power-off components is connected to the input terminal interconnection, and the current output terminal of the power-off components is interconnected. The controller can be externally mounted.

[0043] It is understandable that, considering that the external main line usually connects to multiple external branch lines, in other embodiments, the current input terminals of different power-off components can be connected to the same terminal 2, while the current output terminals of the power-off components are connected to different terminal 2. The specific allocation can be set according to the actual situation.

[0044] The remote backend includes a server; the controller integrates a communication module and can be powered by a rechargeable battery, similar to a laptop computer, normally powered by a charging cable; in the event of a power outage on the charging cable, it can still be powered by the battery, ensuring safety; the controller establishes a data connection with the remote backend via the communication module, allowing staff to access the remote backend and remotely send a control to cut off the power supply line when there is a regional risk of electric shock near the power node, reducing the risk of electric shock and minimizing the impact of power outages at higher levels. The power-off components include transmission component one 3, transmission component two 4, and a continuity component 5. Transmission component one 3 and transmission component two 4 are both located inside the housing 1, corresponding to the input and output terminals respectively, with the continuity component 5 determining whether power is supplied or disconnected.

[0045] The power transmission assembly 3 includes a core 31, which is cylindrical with one end facing the input terminal side and the other end facing the output terminal side; the core 31 is installed by a sliding connection.

[0046] A set of wires is led out from the terminal block of an iron core 31, one of which serves as the power transmission line A and the other as the magnetic force generating line B. The iron core 31 has a through groove along its length. The power transmission line A runs through the through groove and is insulated from the iron core 31, such as by insulating varnish or insulating sleeve. The magnetic force generating line B is spirally arranged 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 there should be two transmission lines A on a certain iron core 31, because the neutral wire needs to be considered. In this embodiment, the neutral wire is not equipped with iron core 31 alone. In addition, the magnetic force generating wire B corresponding to the live wire should be connected back to the neutral wire to form a loop.

[0048] In order to allow the iron core 31 to move, it needs to be supported. Therefore, an insulating and high-temperature resistant ceramic ring 34 is installed on the outer sleeve of the iron core 31. The ceramic ring 34 is fixed to the inner wall of the upper end of the housing 1 by bolts with a base. The ceramic ring 34 limits the movement of the iron core 31, so that the iron core 31 can move between the input terminal and the output terminal.

[0049] Since the iron core 31 is wound with a coil, in order to prevent the coil from interfering with the movement of the iron core 31 in the ceramic ring 34, the ceramic ring 34 is fitted on the section of the iron core 31 away from the input terminal, and the section of the iron core 31 away from the input terminal is not wound with a coil.

[0050] An insulating block 32 is fixed to one end of the iron core 31 away from the input terminal. A conductive block 33 is attached 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 the size of the insulating block 32, and the conductive block 33 is located on the side of the insulating block 32 away from the iron core 31.

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

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

[0053] Spring 44 is sleeved on one end of the movable cylinder 41 away from the power transmission component 3, and one end of spring 44 is fixedly connected to the inner wall of the housing 1, and the other end is fixedly connected to the fixing ring 42.

[0054] The end of the movable cylinder 41 facing the power transmission component 3 is fixedly connected to a conductive block 45 corresponding to the conductive block 33. The conductive block 45 is connected to the output terminal through a wire. The movable cylinder 41 is hollow, and the wire can be built into the cylinder with sufficient slack to meet the pulling requirements when the movable cylinder 41 moves.

[0055] As can be seen from the above, the iron core 31 and the moving cylinder 41 move towards each other to make the conductive block 33 and the conductive block 45 contact each other, thus connecting the input terminal and the output terminal; the spring 44 is used to ensure that the conductive block 33 and the conductive block 45 are in contact with each other, and also to reduce the damage caused by the hard impact when the two move towards each other.

[0056] Since it is impossible for workers to put their hands inside the box 1 during actual use, the following settings are made in this embodiment:

[0057] 1. To minimize the obstruction encountered when the iron core 31 moves, without affecting the circuit conduction;

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

[0059] Specifically:

[0060] The power transmission assembly 3 further includes an insulating sheet 35, a conductive sheet 36, and a conductive strip 37. The insulating sheet 35 is fixedly connected to the end of the iron core 31 away from the power transmission assembly 4. In this embodiment, the insulating sheet 35 is elongated. The horizontally arranged conductive sheet 36 is fixedly connected to the side of the insulating sheet 35 away from the iron core 31. In this embodiment, the size of the conductive sheet 36 is smaller than the size of the insulating sheet 35. One end of the aforementioned power transmission line A is connected to the conductive sheet 36, and the other end is connected to the conductive block 33.

[0061] One end of the conductive strip 37 is fixedly connected to the input terminal, and the other end is bent to slide as a contact on the conductive sheet 36, so as to ensure that the power transmission component 3 can be separated from the power transmission component 4, and that the input terminal and the power transmission component 3 are connected when the circuit is turned on.

[0062] There can be multiple conductive components 5, each corresponding to one of the iron cores 31, or one component can correspond to multiple iron cores 31; this embodiment selects the former as an example for illustration:

[0063] The conductive assembly 5 includes a telescopic unit 51, which includes a cylinder, a piston, and an insulating rod. The cylinder is coaxial with the corresponding iron core 31 and one end is fixed to the housing 1. There are two telescopic units 51, which are located on the inner and outer sides of the housing 1 respectively. A pipe connects the two cylinders. The piston is slidably connected to the cylinder, and the insulating rod is coaxially fixed to the piston and one end extends out of the cylinder. The insulating rod of the telescopic unit 51 inside the housing 1 is fixed to the end of the iron core 31. A magnetizing plate (containing iron alloy) is fixed on the outer side of the piston in the telescopic unit 51 outside the housing 1, and insulating oil is filled between the two pistons.

[0064] According to the above settings, after the input terminal and output terminal are connected to the circuit, when the power is turned on, the power transmission component 3 generates an end-direction magnetic field, which magnetically attracts the outer piston and moves it toward the inside of the housing 1. During the process, the outer piston squeezes the oil, which drives the telescopic unit 51 located on the inside to push the iron core 31 toward the output terminal, thus automatically completing the power supply connection.

[0065] Although the aforementioned telescopic unit 51 uses insulating oil, there is still a risk of leakage. To reduce safety hazards, a corrugated pipe and a flexible insulating sleeve are fitted onto the insulating rod inside the housing 1. The corrugated pipe is located outside the cylinder body, with one end fixed to the insulating rod and the other end fixed to the outer end face of the cylinder body. This design reduces the risk of oil leakage without affecting the movement of the insulating rod.

[0066] While the above method can automatically connect the circuit upon power-on, it cannot disconnect the power. Therefore, this application also includes the following feature:

[0067] The conductive assembly 5 also includes a valve group 52 and an air box 53. The air box 53 covers the telescopic unit 51 outside the housing 1. An air pipe is fixed to the outer end of the telescopic unit 51 outside the housing 1. The air pipe is set outside the insulating rod, and the insulating rod has an air passage. One end of the air passage connects to the cavity inside the cylinder that is away from the oil, and the other end opens to the outer end of the insulating rod. The wall panel of the air box 53 is equipped with an air pipe 2 that connects the inside and outside. The valve group 52 includes an electrically controlled valve 521 installed on the air pipe 1 and an electrically controlled valve 522 installed on the air pipe 2. The electrically controlled valve 521 and the electrically controlled valve 522 are electrically connected to the controller.

[0068] After the circuit is connected by power-on, close the first electric control valve 521, use the small portable air pump connected to the second air pipe to draw out the negative pressure, and then close the second electric control valve 522; the air pump can then be kept or removed.

[0069] When it is necessary to disconnect the power of this application, the electric control valve 521 is opened. Under the action of negative pressure, the outer piston is pulled away from the housing 1. The corresponding piston located in the housing 1 moves synchronously and drives the iron core 31 to move, so as to separate the power transmission assembly 3 and the power transmission assembly 4 to disconnect the power.

[0070] It should be noted that the reason why this application does not use other direct mechanisms to intervene in the enclosure 1 is because there is a high voltage inside the enclosure 1, which needs to be blocked from the inside and outside to minimize the probability of contact between the inside and outside. Therefore, if necessary, an insulated safety box 11 can be further provided. The safety box 11 covers the telescopic unit 51 located inside the enclosure 1 and has an opening for the insulating rod to extend out.

[0071] Under the above settings, although automatic power-on can be achieved, it is highly dependent on negative voltage when power needs to be cut off, and it also needs to resist the magnetic force on the power transmission component 3. Therefore, in another embodiment of this application, the following settings are also made:

[0072] Reference Figure 3 An insulating partition 12 is fixed inside the housing 1. The insulating partition 12 serves two purposes: firstly, it separates the power transmission components 3 and 4; secondly, it serves as a foundation. An iron core 121 is fixed on the insulating partition 12, and the wires connecting the conductive block 45 and the output terminal are wrapped around the 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 to 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 divided into two parts laterally, with the upper part being conductive and the lower part being insulated. 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 neutral wire, and the upper part of the floating slider 123 is connected in series with the magnetic force generating line B.

[0074] Usage: When the power is turned on and the input and output terminals are automatically connected, the iron core 121 generates a magnetic force that attracts the floating slider 123, causing it to:

[0075] 1) There is an upward floating trend. That is, the weight of the floating slider 123 is designed to be no greater than the attraction generated when the power is supplied normally (i.e., when the rated standard is used). However, once there is a risk of direct grounding and leakage of the cable near the node, the current increases and the magnetic force is greater than the weight of the floating slider 123, causing it to float up and disconnect the current outside the iron core 31 so that it loses its magnetic force and does not hinder the subsequent power disconnection.

[0076] If the initial current is too large and the weight of the floating slider 123 is difficult to configure, a bypass can be drawn from the wire on the iron core 121 through the conductive block 45, and then connected back to the output terminal.

[0077] 2) Direct upward floating: The weight of the floating slider 123 is set to be less than the suction force generated during normal power supply. Once the input and output terminals are connected, the iron core 31 becomes ineffective and does not hinder subsequent power cut-off. It is understandable that because the valve group 52 is closed, the iron core 31 cannot move freely towards the input terminal, and the spring 44 can maintain the connected state.

[0078] It should be noted that the bypass circuits of the aforementioned iron core 31 and iron core 121 can be connected in series with current limiting circuits, or even directly with current limiting resistors, so as to modulate the magnetic force relatively appropriately and minimize interference to the original circuit.

[0079] In one embodiment of this application, the diameter of the cylinder outside the housing 1 of the telescopic unit 51 is larger than the diameter of the cylinder inside the housing 1. This arrangement allows the iron core 31 to move a large distance by magnetically attracting the piston on the outside, which in turn more reliably meets the design requirements for power on / off inside the housing 1 and avoids the situation where the circuit is disconnected but the distance is too close to maintain the continuity.

[0080] In another embodiment of this application, an arc-extinguishing chamber 6 is further provided inside the housing 1, and conductive lead plates 7 are led out from the arc-extinguishing chamber 6. The conductive lead plates 7 are in pairs, corresponding to conductive block 33 and conductive block 45 respectively. The design of the arc-extinguishing chamber 6 can reduce the duration and probability of high-temperature arc when conductive block 33 and conductive block 45 are disconnected, thereby improving the service life of the product.

[0081] In this embodiment, the arc-extinguishing chamber can be an air-blown arc-extinguishing structure, that is, a structure with an air-blown arc-extinguishing chamber on the inside. This is existing technology and will not be described in detail here.

[0082] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A power-cutting safety device for electrical construction, characterized in that: It includes a node control box and a remote backend, wherein the node control box includes: The enclosure (1) is a composite structure and has at least an inner layer of insulation; The wiring terminals (2) are multiple, with at least one being an input terminal and multiple being output terminals. Any one input terminal and multiple output terminals are distributed as a group on both sides of the housing (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 includes a power transmission component one (3) corresponding to the input terminal, a power transmission component two (4) corresponding to the output terminal, and a conduction component (5). The power transmission component one (3) includes an iron core one (31) and a conductive block one (33). The iron core one (31) is slidably connected to the housing (1) and the sliding direction is parallel to the arrangement direction of the input terminal and the output terminal. The conductive block one (33) is fixed to the end of the iron core one (31) away from the input terminal and is used to contact the power transmission component two (4). If the current is not direct current, then: one of the iron cores (31) has a set of wires, one of which is a power transmission wire A and the other is a magnetic force generating wire B. One end of the power transmission wire 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 wire B is connected to the input terminal, the other end is connected in series with a current limiting circuit and is connected to the neutral wire after wrapping around the iron core (31); the number of power transmission wires A on a certain iron core (31) is two and they are used to match the neutral wire; The conductive assembly (5) consists of several units, and if each unit corresponds to one iron core (31), the conductive assembly (5) includes a telescopic unit (51), a valve group (52), and an air box (53). There are two telescopic units (51) located inside and outside the housing (1) and arranged coaxially. The two telescopic units (51) are insulated liquid push structures and are interconnected. The telescopic unit (51) located inside the housing (1) is linked to the iron core (31). The movable part of the telescopic unit (51) located outside the housing (1) can be magnetically attracted, and the inner cavity of the movable part away from the input terminal side is connected to the outside. The air box (53) covers the telescopic unit (51) outside the housing (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 is connected to the outside.

2. The power construction safety power-off device according to claim 1, characterized in that: The housing (1) is provided with an insulating partition (12) for separating each power-off component, and an iron core (121) is installed on the insulating partition (12); The second power transmission component includes a second conductive block (45) connected to the output terminal by a wire, and the wire connecting the second conductive block (45) and the output terminal passes around the second iron core (121). A guide rail (122) is provided below the second iron core (121). The guide rail (122) is parallel to the first iron core (31) and is slidably connected to a floating slider (123). The floating slider (123) has one conductive part and the other insulating part located on the lower side of the guide rail (122). The floating slider (123) can float up and down along the guide rail (122). The guide rail (122) is connected to the neutral wire. The upper part of the floating slider (123) is connected in series with a magnetic force generating line B.

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

4. The power construction safety power-off device according to claim 1, characterized in that: The iron core (31) is fitted with a ceramic ring (34), which is installed on the inner wall of the housing (1); The first power transmission component (3) includes an insulating sheet (35), a conductive sheet (36), and a conductive strip (37). The insulating sheet (35) is fixed to one end of the first iron core (31) away from the second power transmission component (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 power transmission line A is connected to the conductive sheet (36), and the other end is connected to the first conductive block (33).

5. The power construction safety disconnection device according to claim 2, characterized in that: The second power transmission component (4) includes a movable cylinder (41), a sliding rod (43), and two springs (44). The movable 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 movable cylinder (41) and has one end fixed to the inner wall of the housing (1) and the other end penetrating the fixed ring (42). The second spring (44) is sleeved on the movable 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 housing (1). The second conductive block (45) is fixed to the end of the movable cylinder (41).

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

7. The power construction safety disconnection device according to claim 1, characterized in that: The telescopic unit (51) includes a cylinder, a piston, and an insulating rod. The cylinder is coaxial with the corresponding iron core (31) and fixed to the housing (1). The two cylinders located inside and outside the housing (1) are interconnected. The piston is slidably connected to the cylinder. One end of the insulating rod is fixed to the piston, and the other end extends out of the corresponding cylinder. The space between the two pistons is filled with insulating liquid. The piston located outside the housing (1) has a magnetized plate fixed to the side facing outward.

8. The power construction safety power-off device according to claim 7, characterized in that: A corrugated tube or flexible insulating sleeve is fitted on the insulating rod inside the box (1). One end of the corrugated tube or flexible insulating sleeve is fixed to the insulating rod, and the other end is fixed to the cylinder. An insulated safety box (11) is provided inside the box (1). The safety box (11) covers the telescopic unit (51) located inside the box (1) and is penetrated by an insulating rod.

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

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