Repeater cable hoist and control method

Abstract

The application discloses a rotating power cable lifting device and a control method. The rotating power cable lifting device comprises a guide frame arranged along a first direction, and a plurality of groups of first magnetic components arranged along the first direction in sequence. The first magnetic components comprise a plurality of first magnetic pieces arranged around the guide frame along the first direction. The lifting platform comprises a surrounding part and a bearing part connected to one side of the surrounding part. The surrounding part is arranged around the guide frame along the first direction. The surrounding part is provided with a plurality of second magnetic pieces arranged around the guide frame along the first direction. The lifting driving assembly comprises a driving source fixed to the lifting platform, a screw rod rotatably connected to the lifting platform along the first direction, and a plurality of guide pieces fixed to the guide frame along the first direction. The screw rod is drivingly connected to the driving source to rotate around the axis of the first direction. The screw rod is engaged with the guide pieces to drive the lifting platform to ascend along the first direction by rotation. The screw rod has a first position and a second position. The power supply and the control assembly are electrically connected to the second magnetic pieces.

Description

Technical Field

[0001] This invention relates to the field of power supply emergency repair equipment, and in particular to a power transfer cable lifting device and control method. Background Technology

[0002] During emergency repairs of broken high-voltage cables, it is often necessary to connect an additional power cable to the break point to restore power to the high-voltage cable as quickly as possible. When the high-voltage cable is an overhead line, a tower needs to be built for repair work. Towers are typically constructed from multiple stacked standard components, and the lifting platform usually operates using gears and racks. When multiple standard components are stacked on the tower, the lifting platform needs to undergo multiple ascents and descents to complete the stack to a certain height. However, the gear and rack mechanism makes it difficult to achieve rapid ascents and descents, affecting repair efficiency. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a power cable lifting device that enables rapid emergency repairs of high-voltage cables, improving repair efficiency.

[0004] The present invention also proposes a control method for using the above-mentioned power transfer cable lifting device.

[0005] According to a first aspect of the present invention, a power transfer cable lifting device includes: The guide frame arranged along the first direction is further provided with a plurality of first magnetic components distributed sequentially along the first direction. The first magnetic components include a plurality of first magnetic elements that surround the guide frame around the first direction. A lifting platform includes a surrounding portion and a support portion connected to one side of the surrounding portion. The surrounding portion surrounds the guide frame in a first direction. The surrounding portion is provided with a plurality of second magnetic elements surrounding the guide frame in the first direction. Each second magnetic element corresponds to each first magnetic element. The second magnetic element is configured to: change its magnetism to be the same as the magnetism of the portion opposite to the first magnetic element when the lifting platform rises; change its magnetism to be opposite to the magnetism of the portion opposite to the first magnetic element when the lifting platform stops; and change its magnetism to be opposite to the magnetism of the portion opposite to the first magnetic element when the lifting platform descends. A lifting drive assembly includes a drive source fixed to the lifting platform, a screw rotatably connected to the lifting platform along a first direction, and a plurality of guide members fixed to the guide frame along the first direction. The screw is driven to the drive source to rotate about an axis in the first direction. The screw engages with the guide members to drive the lifting platform to rise along the first direction by rotation. The screw has a first position and a second position. The screw is configured such that: in the first position, the screw engages with the guide members to drive the lifting platform to rise and fall along the first direction by rotation; and in the second position, the screw disengages from the guide members and is spaced apart from them. The power supply and control component are both electrically connected to the second magnetic component, and the control component is electrically connected to the drive source. The control component is configured to: when the lifting platform changes from a stop to a descent, control the current output by the power supply to the second magnetic component to increase, so as to suspend the lifting platform; when the screw moves from the first position to the second position, control the current output by the power supply to the second magnetic component to decrease, so as to lower the lifting platform.

[0006] The power transfer cable lifting device according to the first aspect of the present invention has at least the following beneficial effects: 1. When the lifting platform rises, the magnetic properties of the second magnetic component and the opposite part of the first magnetic component are the same, so that the entire lifting platform is suspended on the outer circumference of the guide frame. The lifting platform is driven by the drive source to rotate the screw. The rotating screw rises in the first direction through engagement with the guide component, thereby driving the lifting platform to rise. Since the lifting platform is suspended on the outer circumference of the guide frame, the friction between the lifting platform and the guide frame is reduced. Under the same driving force, the lifting platform moves at a higher speed, which increases the rising speed and saves emergency repair time. 2. After the lifting platform rises to the preset position, it stops to make electrical connections between the transfer cable and the high-voltage cable. After the connection is completed, the lifting platform needs to be lowered. First, the control component increases the current of the second magnetic component and adjusts the magnetic properties of the opposite parts of the second and first magnetic components to be opposite, so that the attraction between the second and first magnetic components increases. The lifting platform can be completely suspended in the air by magnetic force. At this time, the screw can be moved from the first position to the second position, and the lifting platform is suspended on the outer circumference of the lifting platform by magnetic force. Then, the current output of the power supply to the second magnetic component is reduced, so that the lifting platform descends. The descent speed of the lifting platform is controlled by controlling the magnitude of the current, so that the descent speed of the lifting platform is higher, saving emergency repair time.

[0007] According to some embodiments of the present invention, the guide frame includes a plurality of standard sections that are detachably connected in sequence along the first direction, and the standard sections have at least one set of the first magnetic components.

[0008] According to some embodiments of the present invention, one side of the standard section is provided with a guide rail, and the side of the guide rail away from the standard section is provided with a plurality of guide members along the first direction, and the plurality of guide rails can be spliced ​​together along the first direction to form a total track.

[0009] According to some embodiments of the present invention, the guide member is a guide wheel, the rotation axis of the guide wheel is perpendicular to the first direction, or the guide member is a toothed segment, the toothed segment being able to mesh with the screw.

[0010] According to some embodiments of the present invention, both ends of the screw are rotatably connected to rotating plates, and the rotating plates are slidably connected to the lifting platform in a direction away from the guide frame. The lifting drive assembly further includes a position adjustment assembly, which includes a first adjusting arm, a second adjusting arm, and a telescopic source. The first adjusting arm and the second adjusting arm are respectively connected to the two rotating plates. The telescopic source is fixed to the lifting platform and is drively connected to the first adjusting arm and the second adjusting arm to drive the rotating plates away from or closer to the guide frame. The control assembly is electrically connected to the telescopic source to control the screw to move between the first position and the second position.

[0011] According to some embodiments of the present invention, it further includes: a lifting assembly disposed on the lifting platform for lifting the power transfer terminal and the cable.

[0012] According to some embodiments of the present invention, it further includes: a cable tie assembly, the cable tie assembly connecting the guide frame to the ground to fix the guide frame at an angle.

[0013] According to some embodiments of the present invention, the lifting platform is provided with a plurality of tilt sensors, the tilt sensors being electrically connected to the control component, and the control component being configured to adjust the current distribution of the second magnetic element to balance the lifting platform when the tilt sensors detect that the lifting platform is tilted.

[0014] According to some embodiments of the present invention, the lifting platform is provided with a settlement sensor, the settlement sensor being electrically connected to the control component, and the control component being configured to increase the current of the second magnetic element when the settlement sensor detects that the lifting platform has settled, so as to stop the lifting platform.

[0015] According to a control method of a second aspect of the present invention, using the power transfer cable lifting device of the first aspect of the present invention, the steps include: S1: The control component controls the power supply to output current to the second magnetic component to a first preset value, and controls the magnetic properties of the second magnetic component and the opposite part of the first magnetic component to be the same, and controls the drive source to drive the screw to rotate, and the screw rises along the first direction by engaging with the guide component, so as to drive the lifting platform to rise along the first direction. S2: The control component controls the lifting platform to move to the end of the guide frame along the first direction, and controls the drive source to stop rotating the screw; S3: The control component controls the drive source to drive the screw to rotate, moving the second magnetic component between the two magnetic poles of the first magnetic component. The power supply outputs current to the second magnetic component to a second preset value, which is greater than the first preset value. The control component also controls the magnetic properties of the opposite part of the second magnetic component to be opposite to those of the first magnetic component, so as to suspend the lifting platform. Then, the control component moves the screw from the first position to the second position, and the screw disengages from the guide. Finally, the control component controls the current output by the power supply to the second magnetic component to decrease, so as to lower the lifting platform. When the platform is close to the ground, the control component controls the current output by the power supply to the second magnetic component to increase to the second preset value, so as to decelerate and stop the lifting platform.

[0016] The control method according to the second aspect of the present invention has at least the following beneficial effects: by increasing the transport speed of the lifting platform during ascent and descent, the time for installing and repairing the transfer cable is saved, which can greatly improve the repair efficiency of the high-voltage cable.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of a power transfer cable lifting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the lifting drive assembly of a power transfer cable lifting device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the lifting platform of a power transfer cable lifting device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a standard section of a power transfer cable lifting device according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the standard section stacking structure of a power transfer cable lifting device according to an embodiment of the present invention; Figure 6 This is a schematic cross-sectional view of the lifting platform and guide frame of the power transfer cable lifting device according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the power transfer cable lifting device and the high-voltage overhead line in one embodiment of the present invention.

[0019] Icon labels: Guide frame 100; First magnetic component 110; Guide component 120; Standard section 130; Guide rail 131; Lifting platform 200; Surrounding part 210; Second magnetic component 211; Bearing part 220; Screw 310; Position adjustment component 400; Lifting device 500; 600 cable-stayed assembly. Detailed Implementation

[0020] 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.

[0021] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0022] In the description of this invention, "several" refers to one or more, and "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0024] Reference Figures 1 to 7As shown, a first aspect of the present invention provides a power cable lifting device, comprising: a guide frame 100, a lifting platform 200, a lifting drive assembly, a power supply and control assembly. The guide frame 100 is arranged along a first direction and is further provided with a plurality of first magnetic components arranged sequentially along the first direction. The first magnetic components include a plurality of first magnetic elements 110 surrounding the guide frame 100 around the first direction. The lifting platform 200 includes a surrounding portion 210 and a bearing portion 220 connected to one side of the surrounding portion 210. The surrounding portion 210 surrounds the guide frame 100 around the first direction and is provided with... A plurality of second magnetic elements 211 are arranged around the guide frame 100 in a first direction. Each second magnetic element 211 corresponds to a first magnetic element 110. The second magnetic element 211 is configured relative to the corresponding first magnetic element 110 to: change its magnetism to be the same as the magnetism of the portion opposite to the first magnetic element 110 when the lifting platform 200 rises; change its magnetism to be opposite to the magnetism of the portion opposite to the first magnetic element 110 when the lifting platform 200 stops; and change its magnetism to be the same as the magnetism of the portion opposite to the first magnetic element 110 when the lifting platform 200 descends. Conversely, the lifting drive assembly includes a drive source fixed to the lifting platform 200, a screw 310 rotatably connected to the lifting platform 200 in a first direction, and a plurality of guide members 120 fixed to the guide frame 100 in the first direction. The screw 310 is drively connected to the drive source to rotate about an axis in the first direction. The screw 310 engages with the guide members 120 to drive the lifting platform 200 to rise in the first direction by rotation. The screw 310 has a first position and a second position. The screw 310 is configured such that, in the first position, the screw 310 engages with the guide members 120 to drive the lifting platform 200 to rise in the first direction by rotation. The lifting platform 200 moves up and down in a first direction; in the second position, the screw 310 disengages from the guide member 120 and is spaced apart from the guide member 120; the power supply and control component are both electrically connected to the second magnetic member 211, and the control component is electrically connected to the drive source. The control component is configured such that when the lifting platform 200 changes from a stop to a descent, the current output by the control power supply to the second magnetic member 211 increases to suspend the lifting platform 200, the screw 310 moves from the first position to the second position, and then the current output by the control power supply to the second magnetic member 211 decreases to lower the lifting platform 200.

[0025] It should be noted that the magnetism of the side of the second magnetic element 211 facing the first magnetic element 110 changes with the magnetism of the first magnetic element 110, ensuring that the magnetism of the opposite portions of the second magnetic element 211 and the first magnetic element 110 is always the same or opposite. Because the first magnetic element 110 is uniformly surrounding the outer circumference of the guide frame 100, and the second magnetic element 211 corresponds one-to-one with the first magnetic element 110, when the magnetism of the opposite portions of the second magnetic element 211 and the first magnetic element 110 is the same, the lifting platform 200 is affected by a uniform repulsive force, resulting in a constant gap between the lifting platform 200 and the outer circumference of the guide frame 100. Conversely, when the magnetism of the opposite portions of the second magnetic element 211 and the first magnetic element 110 is opposite, the lifting platform 200 is affected by a uniform attractive force, again resulting in a constant gap between the lifting platform 200 and the outer circumference of the guide frame 100.

[0026] In this embodiment, the power source is a generator prepared on the ground, and the power source is electrically connected to the second magnetic component 211 of the lifting platform 200 via a separate cable. The generator is a diesel generator.

[0027] It is understandable that when the lifting platform 200 rises, the magnetic properties of the second magnetic component 211 and the corresponding portion of the first magnetic component 110 are the same, causing the lifting platform 200 to float entirely on the outer circumference of the guide frame 100. The lifting platform 200 is driven by a drive source to rotate the screw 310. The rotating screw 310 rises along the first direction through engagement with the guide component 120, thereby driving the lifting platform 200 to rise. Since the lifting platform 200 is suspended on the outer circumference of the guide frame 100, the friction between the lifting platform 200 and the guide frame 100 is reduced. This allows the lifting platform 200 to move at a higher speed under the same driving force, increasing the rising speed and saving repair time. After the lifting platform 200 rises to the preset position, it stops to facilitate the transfer of power cables and high-voltage cables. After the electrical connection is established, the lifting platform 200 needs to be lowered. First, the control component increases the current of the second magnetic component 211 and adjusts the magnetism of the opposite part of the second magnetic component 211 to be opposite to that of the first magnetic component 110, so that the attraction between the second magnetic component 211 and the first magnetic component 110 increases. The lifting platform 200 can be completely suspended in the air by magnetic force. At this time, the screw 310 can be moved from the first position to the second position. The lifting platform 200 is suspended on the outer circumference of the lifting platform 200 by magnetic force alone. Then, the current output of the power supply to the second magnetic component 211 is reduced, so that the lifting platform 200 is lowered. The lowering speed of the lifting platform 200 is controlled by controlling the magnitude of the current, so that the lowering speed of the lifting platform 200 is higher, saving emergency repair time.

[0028] Reference Figure 1 , Figure 4 and Figure 5As shown, in some specific embodiments of the present invention, the guide frame 100 includes a plurality of standard sections 130 that are detachably connected in sequence along a first direction, and each standard section 130 has at least one set of first magnetic components.

[0029] It is worth understanding that the guide frame 100 includes multiple standard sections 130. By stacking multiple standard sections 130, the height of the guide frame 100 can be adjusted, and it can be transported by multiple lifting and lowering movements of the lifting platform 200, so as to realize the installation of the standard sections 130 and make the manufacturing of the guide frame 100 more convenient.

[0030] In this embodiment, both ends of the standard section 130 are provided with connecting parts along the first direction, and the connecting parts are provided with connecting holes. When the two standard sections 130 are stacked along the first direction, the connecting holes of the connecting parts of one standard section 130 are aligned with the connecting holes of the connecting parts of the other standard section 130. Then, a pin is inserted into the through hole formed by the two connecting holes and locked by a nut to realize the assembly of the two standard sections 130.

[0031] Reference Figure 1 , Figure 4 and Figure 5 As shown, in some specific embodiments of the present invention, a guide rail 131 is provided on one side of the standard section 130, and a plurality of guide members 120 along the first direction are provided on the side of the guide rail 131 away from the standard section 130. The plurality of guide rails 131 can be spliced ​​together along the first direction to form a total track.

[0032] It is worth understanding that when the standard section 130 is spliced ​​along the first direction, the guide rail 131 can also be directly connected along the first direction to form a total track, so that the screw 310 can rise along the track.

[0033] Reference Figure 2 As shown, in some specific embodiments of the present invention, the guide member 120 is a guide wheel, the rotation axis of the guide wheel is perpendicular to the first direction, or the guide member 120 is a toothed segment, the toothed segment can mesh with the screw 310.

[0034] It is worth understanding that the screw 310 can be engaged with the guide wheel or through the toothed segment, and through the engagement and rotation of the screw 310, the screw 310 can be raised and lowered in the first direction.

[0035] Reference Figure 3As shown, in some specific embodiments of the present invention, both ends of the screw 310 are rotatably connected to rotating plates. The rotating plates are slidably connected to the lifting platform 200 in a direction away from the guide frame 100. The lifting drive assembly also includes a position adjustment assembly 400. The position adjustment assembly 400 includes a first adjustment arm, a second adjustment arm, and a telescopic source. The first adjustment arm and the second adjustment arm are respectively connected to the two rotating plates. The telescopic source is fixed to the lifting platform 200 and is drively connected to the first adjustment arm and the second adjustment arm to drive the rotating plates away from or close to the guide frame 100. The control assembly is electrically connected to the telescopic source to control the screw 310 to move between the first position and the second position.

[0036] It is understandable that by controlling the first and second adjusting arms to move away from the guide plate through the telescopic source, the screw 310 can be disengaged from the guide member 120, realizing the movement of the screw 310 between the first and second positions, thereby enabling the lifting platform 200 to descend without using the screw 310, thus increasing the descent speed of the lifting platform 200.

[0037] Reference Figure 3 As shown, in some specific embodiments of the present invention, a lifting assembly is also included, located on the lifting platform 200, for lifting the power transfer terminal and the cable.

[0038] It is understandable that when the guide frame 100 is set up, the power transfer terminal and cable are hoisted by the lifting assembly. When the lifting platform 200 rises, the lifting assembly drives the power transfer terminal and power transfer cable to rise together, and the power transfer terminal, power transfer cable and high voltage cable are electrically connected at the top of the guide frame 100.

[0039] In this embodiment, the lifting device 500 includes a rotary table and a boom connected to the rotary table.

[0040] Reference Figure 1 and Figure 7 As shown, some specific embodiments of the present invention also include: a diagonal bracing assembly 600, which connects the guide frame 100 to the ground to diagonally fix the guide frame 100. It is worth understanding that by diagonally bracing the guide frame 100 with the diagonal bracing assembly 600, the guide frame 100 is diagonally fixed, reducing the risk of lateral tilting of the guide frame 100.

[0041] The cable-stayed assembly 600 consists of three sets, connected to the bottom, middle, and top of the guide frame 100 respectively. Each cable-stayed assembly 600 includes at least two cable-stayed steel cables.

[0042] In some specific embodiments of the present invention, the lifting platform 200 is provided with a plurality of tilt sensors. The tilt sensors are electrically connected to the control component. The control component is configured to adjust the current distribution of the second magnetic element 211 to balance the lifting platform 200 when the tilt sensors detect that the lifting platform 200 is tilted.

[0043] It is worth understanding that each of the second magnetic components 211 is electrically connected to a current regulator, and the power supply is electrically connected to each current regulator to control the current regulator, thereby controlling the current magnitude of each second magnetic component 211, and ultimately controlling the magnetic force of each second magnetic component 211. When the tilt sensor detects that one side of the lifting platform 200 is tilted, the power supply controls the magnetic force of the second magnetic component 211 on the opposite side of the tilt to increase, so as to balance the lifting platform 200 and realize the dynamic balance adjustment of the lifting platform 200, making the lifting platform 200 more stable during use.

[0044] In some specific embodiments of the present invention, the lifting platform 200 is provided with a settlement sensor, which is electrically connected to a control component. The control component is configured to increase the current of the second magnetic element 211 when the settlement sensor detects that the lifting platform 200 has settled, so as to stop the lifting platform 200.

[0045] It is understandable that by detecting the settlement of the lifting platform 200 through the settlement sensor, when the settlement of the lifting platform 200 exceeds the preset value range, the current of the second magnetic component 211 is further increased, so that the electromagnetic pulling force on the lifting platform 200 increases, causing the lifting platform 200 to levitate.

[0046] A second aspect of the present invention provides a control method using the power transfer cable lifting device of the first aspect of the present invention, the steps of which include: S1: The control component controls the power supply to output the current to the second magnetic element 211 to a first preset value, and controls the magnetic properties of the second magnetic element 211 and the opposite part of the first magnetic element 110 to be the same, and controls the drive source to drive the screw 310 to rotate, and the screw 310 rises along the first direction through engagement with the guide 120, so as to drive the lifting platform 200 to rise along the first direction. S2: The control component controls the lifting platform 200 to move to the end of the guide frame 100 along the first direction, and controls the drive source to stop rotating the screw 310; S3: The control component controls the drive source to drive the screw 310 to rotate, moving the second magnetic element 211 between the two magnetic poles of the first magnetic element 110. The power supply outputs the current to the second magnetic element 211 to a second preset value, which is greater than the first preset value. The control component controls the magnetic properties of the opposite part of the second magnetic element 211 and the first magnetic element 110 to be opposite, so as to suspend the lifting platform 200. Then, the control component controls the screw 310 to move from the first position to the second position, and the screw 310 disengages from the guide 120. Finally, the control component controls the current output to the second magnetic element 211 to decrease, so as to lower the lifting platform 200. When it is close to the ground, the control component controls the current output to the second magnetic element 211 to increase to the second preset value, so as to decelerate and stop the lifting platform 200.

[0047] It is understandable that by increasing the transport speed of the lifting platform 200 during both its ascent and descent, time is saved for the installation and emergency repair of power cables, thus greatly improving the efficiency of high-voltage cable repair. Specifically, when the lifting platform 200 descends, the magnetic pull of the second magnetic component 211 decreases to buffer the descent speed and prevent it from falling too quickly. Simultaneously, as the lifting platform 200 is about to ground, the current increases, causing the magnetic pull of the second magnetic component 211 to increase slowly, and the lifting platform 200 decelerates, reducing its speed until it hovers at the bottom of the guide frame 100.

[0048] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. 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 power cable lifting device, characterized in that, include: The guide frame arranged along the first direction is further provided with a plurality of first magnetic components distributed sequentially along the first direction. The first magnetic components include a plurality of first magnetic elements that surround the guide frame around the first direction. A lifting platform includes a surrounding portion and a support portion connected to one side of the surrounding portion. The surrounding portion surrounds the guide frame in a first direction. The surrounding portion is provided with a plurality of second magnetic elements surrounding the guide frame in the first direction. Each second magnetic element corresponds to each first magnetic element. The second magnetic elements are disposed opposite to their corresponding first magnetic elements. The second magnetic elements are configured to: change their magnetism to be the same as the magnetism of the portion opposite to the first magnetic element when the lifting platform rises; change their magnetism to be opposite to the magnetism of the portion opposite to the first magnetic element when the lifting platform stops; and change their magnetism to be opposite to the magnetism of the portion opposite to the first magnetic element when the lifting platform descends. A lifting drive assembly includes a drive source fixed to the lifting platform, a screw rotatably connected to the lifting platform along a first direction, and a plurality of guide members fixed to the guide frame along the first direction. The screw is driven to the drive source to rotate about an axis in the first direction. The screw engages with the guide members to drive the lifting platform to rise along the first direction by rotation. The screw has a first position and a second position. The screw is configured such that: in the first position, the screw engages with the guide members to drive the lifting platform to rise and fall along the first direction by rotation; and in the second position, the screw disengages from the guide members and is spaced apart from them. The power supply and control component are both electrically connected to the second magnetic component, and the control component is electrically connected to the drive source. The control component is configured to: when the lifting platform changes from a stop to a descent, control the current output by the power supply to the second magnetic component to increase, so as to suspend the lifting platform; when the screw moves from the first position to the second position, control the current output by the power supply to the second magnetic component to decrease, so as to lower the lifting platform.

2. The power transfer cable lifting device according to claim 1, characterized in that: The guide frame includes a plurality of standard sections that are detachably connected in sequence along the first direction, and each standard section has at least one set of the first magnetic components.

3. The power transfer cable lifting device according to claim 2, characterized in that: One side of the standard section is provided with a guide rail, and the side of the guide rail away from the standard section is provided with multiple guide members along the first direction. The multiple guide rails can be spliced ​​together along the first direction to form a total track.

4. The power transfer cable lifting device according to claim 1, characterized in that: The guide member is a guide wheel, the rotation axis of which is perpendicular to the first direction, or the guide member is a toothed segment that can mesh with the screw.

5. The power transfer cable lifting device according to claim 1, characterized in that: Both ends of the screw are rotatably connected to rotating plates. The rotating plates are slidably connected to the lifting platform in a direction away from the guide frame. The lifting drive assembly also includes a position adjustment assembly, which includes a first adjusting arm, a second adjusting arm, and a telescopic source. The first adjusting arm and the second adjusting arm are respectively connected to the two rotating plates. The telescopic source is fixed to the lifting platform and is drively connected to the first adjusting arm and the second adjusting arm to drive the rotating plates away from or closer to the guide frame. The control assembly is electrically connected to the telescopic source to control the screw to move between the first position and the second position.

6. The power transfer cable lifting device according to claim 1, characterized in that, Also includes: A lifting assembly, located on the lifting platform, is used to lift the power transfer terminal and cable.

7. The power transfer cable lifting device according to claim 1, characterized in that, Also includes: A cable tie assembly connects the guide frame to the ground to fix the guide frame at an angle.

8. The power transfer cable lifting device according to claim 1, characterized in that: The lifting platform is equipped with multiple tilt sensors, which are electrically connected to the control component. The control component is configured to adjust the current distribution of the second magnetic element to balance the lifting platform when the tilt sensors detect that the lifting platform is tilted.

9. The power transfer cable lifting device according to claim 1, characterized in that: The lifting platform is equipped with a settlement sensor, which is electrically connected to the control component. The control component is configured to increase the current of the second magnetic element to stop the lifting platform when the settlement sensor detects that the lifting platform has settled.

10. A control method, characterized in that, Using the power transfer cable lifting device according to any one of claims 1 to 9, the steps include: S1: The control component controls the power supply to output current to the second magnetic component to a first preset value, and controls the magnetic properties of the second magnetic component and the opposite part of the first magnetic component to be the same, and controls the drive source to drive the screw to rotate, and the screw rises along the first direction by engaging with the guide component, so as to drive the lifting platform to rise along the first direction. S2: The control component controls the lifting platform to move to the end of the guide frame along the first direction, and controls the drive source to stop rotating the screw; S3: The control component controls the drive source to drive the screw to rotate, moving the second magnetic component between the two magnetic poles of the first magnetic component. The power supply outputs current to the second magnetic component to a second preset value, which is greater than the first preset value. The control component also controls the magnetic properties of the opposite part of the second magnetic component to be opposite to those of the first magnetic component, so as to suspend the lifting platform. Then, the control component moves the screw from the first position to the second position, and the screw disengages from the guide. Finally, the control component controls the current output by the power supply to the second magnetic component to decrease, so as to lower the lifting platform. When the platform is close to the ground, the control component controls the current output by the power supply to the second magnetic component to increase to the second preset value, so as to decelerate and stop the lifting platform.

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