A linear pole changes the live working hoisting device of pole of installation of one -man convenience

Abstract

The application discloses a linear pole improved tension pole live-line work lifting device convenient for single-person installation, which comprises a lifting device, a lifting device and a cross arm fixer, a first through hole for penetrating through the lifting device is arranged on the lifting device, the lifting device can be up and down and is arranged in the first through hole of the lifting device in a penetrating mode, the cross arm fixer is connected to one side of the lifting device, the lifting device is detachably connected with the lifting device, and the lower end of the lifting device is smaller in size than the size of the first through hole, so that the lower end of the lifting device can penetrate into the first through hole. The linear pole improved tension pole live-line work lifting device convenient for single-person installation can reduce the weight of the component that needs to be held when a single component is installed, reduce the single-person installation difficulty, realize single-person disassembly and assembly of the lifting device, and reduce the number of workers who need to work in the air.

Description

Technical Field

[0001] This invention relates to the field of power equipment modification tools, and in particular to a live-line lifting device for converting straight poles into tension poles that is easy for a single person to install. Background Technology

[0002] Most current power distribution networks are double-circuit systems, which typically have the following drawbacks: fewer disconnect switches in double-circuit delta-arranged lines, and significant line crossings. When maintenance is required, a complete power outage must be coordinated across the entire network, resulting in a large impact area. To reduce large-scale power outages caused by these issues, improve power supply reliability, and minimize unnecessary power outage losses and customer impact, live-line bypass work is necessary. However, bypass cables require tension poles, which are often encountered in practice as straight poles. Therefore, this problem can be solved by replacing energized straight poles with tension poles. Patent application CN202210373758.4 discloses a live-line working tool for converting a double-circuit line triangularly arranged straight pole into a tension pole. The tool uses a crossarm fixer to secure a lifting device to the crossarm, and then a lifting device with a fixed conductor is threaded through it. Because the lifting device has a vertical lifting structure, the conductor rises and falls synchronously with the lifting device, ensuring stability during lifting. Furthermore, since the crossarm fixer is fixed to one side of the lifting device, the entire lifting device is kept away from the crossarm after installation, effectively preventing interference from the crossarm during lifting and significantly improving lifting quality and efficiency. However, this tool is quite heavy, requiring two people to install it on the crossarm, resulting in high labor costs. Additionally, two people need to be simultaneously transported to the crossarm via a lift, creating a cramped and inconvenient installation space. Summary of the Invention

[0003] In order to overcome the problem that the existing lifting devices are inconvenient for single-person installation, this invention provides a lifting device for live-line work on a straight pole converted into a tension pole that is easy for single-person installation. It can reduce the weight of the components that need to be held when installing individual parts, reduce the difficulty of single-person installation, realize the disassembly and assembly of the lifting device by a single person, and reduce the number of workers required for high-altitude operations.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A lifting device for live-line work on a straight pole converted into a tension pole, which is easy for a single person to install, includes a lifting device, a hoisting device, and a crossbeam fixer. The lifting device has a first through hole for the hoisting device to pass through. The hoisting device can be lifted and lowered through the first through hole of the lifting device. The crossbeam fixer is connected to one side of the lifting device. The hoisting device is detachably connected to the lifting device. The lower end of the hoisting device is smaller than the size of the first through hole so that the lower end of the hoisting device can be inserted into the first through hole.

[0005] In the above technical solution, the lifting device and the lifting device are detachably connected. Before installing the lifting device onto the pole, the two can be separated. After installing the lifting device and the crossarm fixer onto the crossarm of the pole, the lower end of the lifting device is inserted into the first through hole to connect the lifting device and the lifting device. Separating the lifting device and the lifting device reduces the weight of the components that need to be held when installing individual parts, reduces the difficulty of installation by a single person, allows for the assembly and disassembly of the lifting device by a single person, and reduces the number of workers required for high-altitude operations.

[0006] Preferably, the lifting device is provided with a limiting member detachably connected to the lifting device near its lower end. The limiting member prevents the lifting device from detaching from the lifting device during lifting. During installation, the limiting member is first removed, the lifting device is installed onto the lifting device, and then the limiting member is reinstalled to limit the lifting device's movement.

[0007] Preferably, the lifting device has a horizontally arranged second through hole near its lower end. The limiting member is equipped with a magnet; one end of the limiting member is located outside the second through hole and is attracted to the lifting device by the magnet, while the other end passes through the second through hole. This structure facilitates the installation and removal of the limiting member from the lifting device. During installation, one end of the limiting member is inserted into the second through hole, and the magnet attracts the limiting member to the lifting device, thus limiting its position.

[0008] Preferably, the lifting device has a second through hole located laterally near its lower end. One end of the limiting member has a limiting portion larger than the second through hole, and the other end of the limiting member passes through the second through hole and has a resilient pin to prevent the limiting member from disengaging from the second through hole. This structure facilitates the installation and removal of the limiting member from the lifting device. During installation, one end of the limiting member is inserted into the second through hole, and the resilient pin is inserted into the pin hole on that end of the limiting member, thus limiting the lifting device. During removal, the resilient pin is pulled out of the limiting member, and the limiting member is pulled out of the second through hole to release the limiting effect on the lifting device.

[0009] Preferably, the lifting device includes a fixed plate, and the limiting member includes a slider and a telescopic spring. The slider and the fixed plate are slidably connected in the lateral direction. The telescopic spring connects the slider and the fixed plate respectively, so that one end of the slider extends out of the fixed plate. The horizontal projection of the slider exceeds the outline of the horizontal projection of the first through hole. A first guide slope is provided on the lower side of the end of the slider that extends out of the fixed plate.

[0010] When the lifting device is installed onto the lifting device, the lower end of the lifting device can be directly inserted into the first through hole. The first guide ramp will retract the fixing plate when the slider encounters an obstruction, allowing the lower end of the lifting device to smoothly pass through the first through hole, thus completing the installation of the lifting device. After installation, the telescopic spring will cause one end of the slider to extend out of the fixing plate, limiting the lifting device. When it is necessary to disassemble the lifting device, the slider can be manually pressed back into the fixing plate to release the limiting effect on the lifting device, and then the lifting device can be pulled out from the first through hole.

[0011] Preferably, a retractable locking block is provided below the slider. The retractable locking block is slidably connected to the fixing plate in the vertical direction. The slider has a slot that matches the retractable locking block. When the slider retracts, the retractable locking block engages with the slot to keep the slider in the retracted state. When the lifting device needs to be disassembled, the slider can be manually pressed back into the fixing plate to release the limiting effect on the lifting device. Then, the retractable locking block can be engaged with the slot, and the lifting device can be pulled out from the first through hole. It is not necessary to hold the slider down continuously during the disassembly process, making the disassembly process more convenient.

[0012] Preferably, an unlocking block is provided above the slider, and the unlocking block is slidably connected to the fixing plate laterally. A contact block is provided on the inner sidewall of the first through hole near the lower end. The unlocking block extends out of the fixing plate, and guide surfaces are provided on both the upper and lower sides of the end face of the unlocking block extending out of the fixing plate, so that the unlocking block can retract into the fixing plate when it contacts the other unlocking block. One end of the retraction locking block contacts the unlocking block through an inclined surface, so that when the unlocking block retracts into the fixing plate, the unlocking block moves the retraction locking block downward, causing the retraction locking block to disengage from the slot. When it is necessary to disassemble the lifting device, the lifting device can be moved first, so that the unlocking block is moved above the contact block. Then, the slider can be manually pressed back to the fixing plate to release the slider's limiting effect on the lifting device. Then, the retraction locking block can be inserted into the slot, and the lifting device can be pulled out from the first through hole. It is not necessary to hold the slider down continuously during the disassembly process, making the disassembly process more convenient. During installation, the unlocking block will contact the contact block, causing the unlocking block to retract into the fixed plate. The inclined surface will then move the retracting locking block downwards, disengaging it from the slot. This achieves automatic reset of the retracting locking block during installation, preventing workers from forgetting to reset the retracting locking block and causing the slider to fail to move properly.

[0013] Preferably, the crossarm fixing device is detachably connected to the lifting device. This structure allows for a detachable connection between the crossarm fixing device and the lifting device. During the installation of the lifting device, the crossarm fixing device is first fixed to the crossarm, and then the lifting device is fixed to the crossarm fixing device. This further reduces the weight of the component that needs to be held when installing a single part, thus reducing the difficulty of installation for a single person.

[0014] Preferably, the crossarm retainer has an upward-opening mounting slot, and the lifting device includes a fixed frame with a mounting plate adapted to the mounting slot. The lower end of the mounting plate extends into the mounting slot and contacts the bottom surface of the slot. Since the lifting device is mainly subjected to a downward vertical force during operation, the lower end of the mounting plate extending into the mounting slot enables quick installation of the crossarm retainer and the lifting device. Furthermore, the contact between the bottom surface of the mounting slot and the lower end of the mounting plate provides support for the lifting device.

[0015] Preferably, the crossarm retainer is equipped with an anti-detachment component, one end of which passes through the crossarm retainer and engages with the mounting plate. This anti-detachment component prevents the lifting device from falling off the crossarm retainer after installation.

[0016] Preferably, the crossarm retainer is provided with an anti-detachment component, which is a fixing bolt. One end of the fixing bolt passes through the third through hole on the crossarm retainer and is threadedly connected to the mounting plate.

[0017] Preferably, the crossarm retainer is equipped with an anti-detachment component and an anti-detachment spring. The anti-detachment component is slidably connected to the crossarm retainer laterally. The two ends of the anti-detachment spring are connected to the anti-detachment component and the crossarm retainer, respectively, so that one end of the anti-detachment component extends into a positioning hole on the mounting plate, limiting the mounting plate. A second guide slope is provided on the upper side of the end of the anti-detachment component extending from the mounting plate. The anti-detachment component can limit the lifting device, preventing it from falling off the crossarm retainer. During installation of the lifting device, the mounting plate contacts the second guide slope, causing the anti-detachment component to retract, facilitating installation. For disassembly, simply pull the other end of the anti-detachment component to remove it from the mounting plate, thus releasing its limitation on the mounting plate. The anti-detachment component only serves a limiting function and bears almost no force during the operation of the lifting device.

[0018] Preferably, the mounting groove has an upward-opening clearance groove at the middle position of the side of the mounting plate closest to the lifting device, and a reinforcing rib is provided between the mounting plate and the fixed frame, with the reinforcing rib passing through the clearance groove. This structure can increase the connection strength between the mounting plate and the fixed frame. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is a partial structural diagram of Example 2. Figure 1 ; Figure 4 This is a partial structural diagram of Example 2. Figure 2 ; Figure 5 yes Figure 2 A magnified view of a section at point A in the middle; Figure 6 yes Figure 2 A magnified view of a section at point B in the middle.

[0020] In the diagram: Lifting device 1, First through hole 1.1, Fixed frame 1.2, Mounting plate 1.3, Positioning hole 1.4, Reinforcing rib 1.5, Transmission gear set 1.6, Drive assembly 1.7, Lifting device 2, Second through hole 2.1, Fixed plate 2.2, Lifting rack 2.3, Wire fixing block 2.4, Opening slot 2.5, Limiting pin 2.6, Crossarm fixing device 3, Mounting slot 3.1, Clearance slot 3.3, Crossarm fixing frame 3.4, Sliding limit block 3.5, Fixed limit block 3.6, First sliding limiter 3.7, Second sliding limiter 3.8, Limiting component 4, Slider 4.1, Slot 4.1.1, Telescopic spring 4.2, First guide slope 4.3, Limiting part 4.4, Magnet 5, Elastic pin 6, Retracting locking block 7, Unlocking block 8, Guide surface 8.1, Anti-detachment component 9, Second guide slope 9.1, Anti-detachment spring 10, Contact block 11. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0022] Example 1: like Figure 1 and Figure 2 As shown, a lifting device for live-line work on a straight pole converted into a tension pole, which is easy for a single person to install, includes a lifting device 1, a hoisting device 2, and a crossbeam fixer 3. The lifting device 1 is provided with a first through hole 1.1 for the hoisting device 2 to pass through. The hoisting device 2 can be lifted and lowered through the first through hole 1.1 of the lifting device 1. The crossbeam fixer 3 is connected to one side of the lifting device 1. The hoisting device 2 is detachably connected to the lifting device 1. The lower end of the hoisting device 2 is smaller than the size of the first through hole 1.1 so that the lower end of the hoisting device 2 can pass through the first through hole 1.1.

[0023] In the above technical solution, the lifting device 2 and the lifting device 1 are detachably connected. Before installing the lifting device onto the pole, the two can be separated. After installing the lifting device 1 and the crossarm fixing device 3 onto the crossarm of the pole, the lower end of the lifting device 2 is inserted into the first through hole 1.1 to connect the lifting device 2 and the lifting device 1. Installing the lifting device 2 and the lifting device 1 separately can reduce the weight of the component that needs to be held when installing a single part, reduce the difficulty of installation by a single person, enable a single person to assemble and disassemble the lifting device, and reduce the number of workers required for high-altitude operations.

[0024] The lifting device 1 includes a fixed frame 1.2 and a transmission gear set 1.6 that passes through the fixed frame 1.2 and meshes with the lifting device 2. A drive component 1.7 is located on the front side of the fixed frame 1.2 and is used to drive the transmission gear set 1.6 to perform transmission work. A control component is also included to control the start or stop of the transmission gear set 1.6. This device can achieve stability in lifting and lowering, ensure control of lifting and lowering in confined spaces, facilitate the installation of the entire lifting device, and enable remote control of the control component to start or stop the first gear drive component.

[0025] The lifting device 2 includes two parallel and opposite fixed plates 2.2 and two lifting racks 2.3 fixed back to back between the two parallel and opposite fixed plates 2.2. A wire fixing block 2.4 is also provided between the two parallel and opposite fixed plates 2.2 and at the top of the two lifting racks 2.3. An opening slot 2.5 for placing wires is provided at the end of the wire fixing block 2.4 away from the two parallel and opposite fixed plates 2.2. A limit pin 2.6 is provided at the opening end of the opening slot 2.5.

[0026] The crossarm fixing device 3 includes a crossarm fixing frame 3.4, a sliding limit block 3.5, a fixed limit block 3.6, a first sliding limiter 3.7, and several second sliding limiters 3.8. One end of the sliding limit block 3.5 slides through the crossarm fixing frame 3.4, and the other end of the sliding limit block 3.5 is slidably connected to the first sliding limiter 3.7. The fixed limit block 3.6 is fixed to the end of the crossarm fixing frame 3.4 away from the fixed frame 1.2. The second sliding limiters 3.8 are parallel to each other and slide relative to each other at the lower part of the crossarm fixing frame 3.4. This device can adapt to various crossarms and can be adjusted according to the size and position of the crossarm to ensure the fixing quality of the entire conductor lifting device. Other parts of the lifting device structure not described in detail in this application can be found in patent applications CN202210362178.5 and CN202210373758.4.

[0027] Example 2: like Figure 2As shown, based on Embodiment 1, the lifting device 2 is provided with a limiting member 4 detachably connected to the lifting device 2 near its lower end. The limiting member 4 can prevent the lifting device 2 from falling off the lifting device 1 during lifting. When installing the lifting device 2, the limiting member 4 is first removed, and after the lifting device 2 is installed on the lifting device 1, the limiting member 4 is then installed back on the lifting device 2 to limit the lifting device 2.

[0028] In one embodiment, such as Figure 3 As shown, the lifting device 2 has a horizontally arranged second through hole 2.1 near its lower end. The limiting member 4 is equipped with a magnet 5. One end of the limiting member 4 is located outside the second through hole 2.1 and is attracted to the lifting device 2 by the magnet 5. The other end of the limiting member 4 passes through the second through hole 2.1. This structure facilitates the installation and removal of the limiting member 4 from the lifting device 2. During installation, one end of the limiting member 4 is inserted into the second through hole 2.1, and the magnet 5 attracts the limiting member 4 to the lifting device 2, thus limiting the lifting device 2. In this application, the lifting direction of the lifting device 2 is vertical, and the axis of the second through hole 2.1 is horizontal.

[0029] In another embodiment, such as Figure 4 As shown, the lifting device 2 has a second through hole 2.1 horizontally positioned near its lower end. One end of the limiting member 4 has a limiting part 4.4 larger than the second through hole 2.1, and the other end of the limiting member 4 passes through the second through hole 2.1 and has an elastic pin 6 to prevent the limiting member 4 from disengaging from the second through hole 2.1. This structure facilitates the installation and removal of the limiting member 4 from the lifting device 2. During installation, one end of the limiting member 4 is inserted into the second through hole 2.1, and the elastic pin 6 is inserted into the pin hole on that end of the limiting member 4, thus limiting the lifting device 2. During removal, the elastic pin 6 is pulled out from the limiting member 4, and the limiting member 4 is pulled out from the second through hole 2.1 to release the limiting effect on the lifting device 2.

[0030] In another embodiment, the lifting device 2 is provided with a horizontally arranged threaded hole near its lower end, and one end of the limiting member 4 is disposed in the threaded hole and threadedly connected thereto.

[0031] Example 3: like Figure 5As shown, based on Embodiment 1, the lifting device 2 includes a fixed plate 2.2, and the limiting member 4 includes a slider 4.1 and a telescopic spring 4.2. The slider 4.1 is slidably connected to the fixed plate 2.2 in the lateral direction. The telescopic spring 4.2 connects the slider 4.1 and the fixed plate 2.2 respectively, so that one end of the slider 4.1 extends out of the fixed plate 2.2. The horizontal projection of the slider 4.1 exceeds the outline of the horizontal projection of the first through hole 1.1. A first guide slope 4.3 is provided on the lower side of the end of the slider 4.1 that extends out of the fixed plate 2.2.

[0032] When the lifting device 2 is installed onto the lifting device 1, the lower end of the lifting device 2 can be directly inserted into the first through hole 1.1. The first guide slope 4.3 will retract the fixing plate 2.2 when the slider 4.1 encounters an obstruction, allowing the lower end of the lifting device 2 to pass smoothly through the first through hole 1.1, thus completing the installation of the lifting device 2. After installation, the telescopic spring 4.2 will cause one end of the slider 4.1 to extend out of the fixing plate 2.2, limiting the lifting device 2. When it is necessary to disassemble the lifting device 2, the slider 4.1 can be manually pressed back into the fixing plate 2.2 to release the limiting effect on the lifting device 2, and then the lifting device 2 can be pulled out from the first through hole 1.1.

[0033] A retraction locking block 7 is provided below the slider 4.1. The retraction locking block 7 is slidably connected to the fixing plate 2.2 in the vertical direction. The slider 4.1 is provided with a slot 4.1.1 that matches the retraction locking block 7. When the slider 4.1 retracts, the retraction locking block 7 engages with the slot 4.1.1 to keep the slider 4.1 in the retracted state. When it is necessary to disassemble the lifting device 2, the slider 4.1 can be manually pressed back into the fixing plate 2.2 to release the limiting effect on the lifting device 2. Then, the retraction locking block 7 can be engaged with the slot 4.1.1, and the lifting device 2 can be pulled out from the first through hole 1.1. It is not necessary to keep the slider 4.1 installed during the disassembly process, making the disassembly process more convenient.

[0034] An unlocking block 8 is provided above the slider 4.1. The unlocking block 8 is slidably connected to the fixing plate 2.2 in the lateral direction. A contact block 11 is provided on the inner side wall of the first through hole 1.1 near the lower end. The unlocking block 8 extends out of the fixing plate 2.2. Guide surfaces 8.1 are provided on both the upper and lower sides of the end face of the unlocking block 8 extending out of the fixing plate 2.2 so that the unlocking block 8 can retract into the fixing plate 2.2 when it contacts the other unlocking block 8. One end of the retraction locking block 7 contacts the unlocking block 8 through an inclined surface so that when the unlocking block 8 retracts into the fixing plate 2.2, the unlocking block 8 moves the retraction locking block 7 down, so that the retraction locking block 7 disengages from the slot 4.1.1. When disassembling the lifting device 2, first move the lifting device 2 so that the unlocking block 8 moves above the contact block 11. Then, manually press the slider 4.1 back onto the fixing plate 2.2 to release the limiting effect of the slider 4.1 on the lifting device 2. Next, insert the retractable locking block 7 into the slot 4.1.1 and pull the lifting device 2 out of the first through hole 1.1. It is not necessary to hold the slider 4.1 down during the disassembly process, making the disassembly process more convenient. During installation, the unlocking block 8 will contact the contact block 11, causing the unlocking block 8 to retract into the fixing plate 2.2. The inclined surface will then cause the retractable locking block 7 to move downward, disengaging the retractable locking block 7 from the slot 4.1.1. This achieves automatic reset of the retractable locking block 7 during installation, preventing workers from forgetting to reset the retractable locking block 7, which could lead to the slider 4.1 failing to properly limit its position.

[0035] Example 4: like Figure 6 As shown, based on Embodiment 1, the crossbeam fixer 3 is detachably connected to the lifting device 1. This structure, through the detachable connection between the crossbeam fixer 3 and the lifting device 1, allows for the following installation process: first, the crossbeam fixer 3 is fixed to the crossbeam, and then the lifting device 1 is fixed to the crossbeam fixer 3. This further reduces the weight of components that need to be held when installing individual parts, thus reducing the difficulty of installation by a single person.

[0036] The crossbeam fixer 3 has an upward-opening mounting groove 3.1. The lifting device 1 includes a fixed frame 1.2, on which a mounting plate 1.3 adapted to the mounting groove 3.1 is provided. The lower end of the mounting plate 1.3 extends into the mounting groove 3.1 and contacts the bottom surface of the mounting groove 3.1. Since the lifting device 1 is mainly subjected to a vertically downward force during operation, the lower end of the mounting plate 1.3 extending into the mounting groove 3.1 enables quick installation of the crossbeam fixer 3 and the lifting device 1. Furthermore, the contact between the bottom surface of the mounting groove 3.1 and the lower end of the mounting plate 1.3 provides support for the lifting device 2.

[0037] The mounting groove 3.1 has an upward-opening clearance groove 3.3 located in the middle of the side near the lifting device 1. A reinforcing rib 1.5 is provided between the mounting plate 1.3 and the fixed frame 1.2, and the reinforcing rib 1.5 passes through the clearance groove 3.3. This structure can increase the connection strength between the mounting plate 1.3 and the fixed frame 1.2.

[0038] In one embodiment, the crossarm fixing device 3 is provided with an anti-detachment component 9, one end of which passes through the crossarm fixing device 3 and is engaged with the mounting plate 1.3. The anti-detachment component 9 can prevent the lifting device 1 from falling off the crossarm fixing device 3 after installation.

[0039] In another embodiment, the crossarm retainer 3 is provided with an anti-detachment component 9, which is a fixing bolt. One end of the fixing bolt passes through the third through hole on the crossarm retainer 3 and is threadedly connected to the mounting plate 1.3.

[0040] In another embodiment, such as Figure 6 As shown, the crossbeam fixer 3 is equipped with an anti-detachment component 9 and an anti-detachment spring 10. The anti-detachment component 9 is slidably connected to the crossbeam fixer 3 laterally. The two ends of the anti-detachment spring 10 are respectively connected to the anti-detachment component 9 and the crossbeam fixer 3, so that one end of the anti-detachment component 9 extends into the positioning hole 1.4 on the mounting plate 1.3, limiting the mounting plate 1.3. A second guide slope 9.1 is provided on the upper side of the end of the anti-detachment component 9 extending out of the mounting plate 1.3. The anti-detachment component 9 can limit the lifting device 1, preventing it from falling off the crossbeam fixer 3. During the installation of the lifting device 1, the mounting plate 1.3 contacts the second guide slope 9.1, causing the anti-detachment component 9 to retract, facilitating the installation of the lifting device 1. When disassembly is required, simply pull the other end of the anti-detachment component 9 to pull it out of the mounting plate 1.3 to release the anti-detachment component 9's limitation on the mounting plate 1.3. The anti-detachment component 9 only serves a limiting function and bears almost no force during the operation of the lifting device.

Claims

1. A lifting device for live-line working on a straight pole converted into a tension pole, which is easy for a single person to install, comprising a lifting device, a hoisting device, and a crossbeam fixer, wherein the lifting device is provided with a first through hole for the hoisting device to pass through, the hoisting device being able to be lifted and lowered through the first through hole of the lifting device, and the crossbeam fixer being connected to one side of the lifting device, characterized in that... The lifting device is detachably connected to the lifting device, and the lower end of the lifting device is smaller than the size of the first through hole so that the lower end of the lifting device can pass through the first through hole. The lifting device is provided with a limiting component that can be detachably connected to the lifting device near its lower end; The lifting device includes a fixed plate, and the limiting member includes a slider and a telescopic spring. The slider and the fixed plate are slidably connected in the lateral direction. The telescopic spring is connected to the slider and the fixed plate respectively, so that one end of the slider extends out of the fixed plate. The horizontal projection of the slider exceeds the outline of the horizontal projection of the first through hole. A first guide slope is provided on the lower side of the end of the slider that extends out of the fixed plate. The slider is provided with a retraction locking block below it. The retraction locking block is slidably connected to the fixing plate in the vertical direction. The slider is provided with a slot that matches the retraction locking block. When the slider retracts, the retraction locking block is engaged in the slot to keep the slider in the retracted state. An unlocking block is provided above the slider. The unlocking block is slidably connected to the fixing plate in the horizontal direction. A contact block is provided on the inner side wall of the first through hole near the lower end. The unlocking block extends out of the fixing plate. Guide surfaces are provided on both the upper and lower sides of the end face of the unlocking block extending out of the fixing plate so that the unlocking block can retract into the fixing plate when the contact block contacts the unlocking block. One end of the retraction locking block contacts the unlocking block through an inclined surface so that when the unlocking block retracts into the fixing plate, the unlocking block moves the retraction locking block down, causing the retraction locking block to disengage from the slot. When the lifting device needs to be disassembled, first move the lifting device so that the unlocking block moves above the contact block, then manually press the slider back to the fixing plate to release the slider's limiting effect on the lifting device, then insert the retractable locking block into the slot and pull the lifting device out of the first through hole. During the installation of the lifting device, after the lower end of the lifting device passes through the first through hole, the unlocking block contacts the contact block, causing the unlocking block to retract into the fixed plate. The inclined surface then moves the retractable locking block downward, causing the retractable locking block to disengage from the slot and automatically reset the retractable locking block.

2. The lifting device for live-line work on a straight pole converted into a tension pole, which is easy for a single person to install, as described in claim 1, is characterized in that... The lifting device has a second through hole arranged horizontally near its lower end. The limiting member is equipped with a magnet. One end of the limiting member is located outside the second through hole and is attracted to the lifting device by the magnet. The other end of the limiting member passes through the second through hole.

3. The lifting device for live-line work on a straight pole converted into a tension pole, which is easy for a single person to install, as described in claim 1, is characterized in that... The lifting device has a second through hole arranged laterally near its lower end. One end of the limiting member has a limiting part with a size larger than the second through hole. The other end of the limiting member passes through the second through hole and has an elastic pin to prevent the limiting member from disengaging from the second through hole.

4. A live-line working lifting device for converting a straight pole into a tension pole, which is easy for a single person to install, as described in any one of claims 1 to 3, characterized in that... The crossbeam fixer is detachably connected to the lifting device.

5. A live-line working lifting device for converting a straight pole into a tension pole, which is easy for a single person to install, as described in claim 4, is characterized in that... The crossbeam fixer is provided with an upward-opening mounting groove. The lifting device includes a fixed frame, and the fixed frame is provided with a mounting plate adapted to the mounting groove. The lower end of the mounting plate extends into the mounting groove and contacts the bottom surface of the mounting groove.

6. A lifting device for live-line work on a straight pole converted into a tension pole, which is easy for a single person to install, as described in claim 5, is characterized in that... The crossarm retainer is equipped with an anti-detachment component, which is a fixing bolt. One end of the fixing bolt passes through the third through hole on the crossarm retainer and is threadedly connected to the mounting plate.

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