A tilt high-voltage sleeve hoisting tool without lifting rings

Abstract

The utility model relates to tilt high pressure sleeve hoisting technical field of no hanging ring, propose a kind of tilt high pressure sleeve hoisting tool of no hanging ring, including first double-eared main sling, second double-eared main sling, double-eared auxiliary sling, double-eared around sling, cable wind rope and around gasket, around gasket by including first C type gasket and second C type gasket, both are installed between porcelain skirt and metal flange of high pressure sleeve, outer wall is equipped with recess, for embedding main sling ring sleeve, avoid porcelain skirt local stress. Double-eared auxiliary sling, main sling, double-eared around sling form three-section hoisting structure;Cable wind rope is used for hoisting end auxiliary dismantling lifting appliance. Light structure, not using metal lifting appliance, effectively prevent high pressure sleeve hoisting process due to stress too concentrated, eccentric force, the security risk caused by metal lifting appliance to high pressure sleeve. Realize high pressure sleeve smooth lifting, angle adjustment and safe dismantling lifting appliance, easy to operate, improve hoisting efficiency and security.

Description

Technical Field

[0001] This utility model relates to the field of lifting technology for inclined high-pressure bushings without lifting rings, and in particular to a lifting tool for inclined high-pressure bushings without lifting rings. Background Technology

[0002] High-voltage bushings, as important components in high-voltage power transmission and transformation equipment, are mainly used to safely lead conductive joints out from the equipment housing, while simultaneously achieving effective insulation between high voltage and the grounded outer shell. Existing high-voltage bushings typically consist of a ceramic or composite insulating shell, a conductive core, and a connecting sealing structure. To increase the creepage distance, a ceramic skirt is specially designed on the outer side of the high-voltage bushing. However, the ceramic skirt is relatively thin and easily damaged, readily breaking or cracking under external forces.

[0003] During the manufacturing, transportation, installation, and maintenance of power transmission and transformation equipment, high-voltage bushings often require hoisting operations, such as adjusting them from a horizontal transport position to an inclined position, or adjusting them from an inclined position to a horizontal transport position for equipment maintenance. If improper force is applied or insufficient protection is provided during hoisting, it can easily lead to localized stress concentration, collision, or slippage damage to the porcelain skirt, which may result in insulation failure.

[0004] Currently used hoisting methods still have the following problems: When metal lifting tools come into contact with or collide with the surface of the ceramic skirt during the lifting process, micro-cracks or damage may occur in the ceramic insulator shell, affecting the insulation performance and operational reliability of the bushing. Traditional lifting slings have rope knots located at the root of the ceramic skirt during casing installation, which causes stress concentration at the root of the ceramic skirt and is prone to damage to the ceramic skirt. In addition, after the lifting slings are in place, personnel and machinery are often required to climb to heights to remove them, which increases the risk of working at heights. At the same time, the operation is time-consuming and resource-intensive, which affects the lifting efficiency. Therefore, it is necessary to provide a lifting tool for tilting high-pressure bushings without lifting rings to solve the problems of easy detachment and collision damage to the ceramic skirt of existing metal lifting tools and the inconvenience of dismantling at height, so as to achieve safe and efficient lifting operations. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a lifting tool for tilting high-pressure bushings without lifting rings, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A lifting tool for inclined high-pressure bushings without lifting rings includes: a first double-ear main lifting sling, a second double-ear main lifting sling, a double-ear auxiliary lifting sling, a double-ear wrap-around lifting sling, guy ropes, and wrap-around washers; The surrounding gasket includes a first C-shaped gasket and a second C-shaped gasket, which are symmetrically arranged between the ceramic skirt and the metal flange of the high-pressure bushing. The outer walls of the first C-shaped gasket and the second C-shaped gasket are provided with grooves. The outer wall height of the surrounding gasket is higher than the outer surface of the ceramic skirt. One end of the first double-ear main sling and one end of the second double-ear main sling form a loop and fit into the groove of the first C-shaped washer and the second C-shaped washer, respectively; The double-ear sling is wrapped around the neck of the high-voltage bushing, with the two lugs of the double-ear sling facing the lifting direction of the high-voltage bushing. The free ends of the first double-ear main sling and the second double-ear main sling cross above the high-pressure bushing and then pass through the two lugs of the double-ear loop sling respectively before being hung on the main hook; One end of the double-ear auxiliary sling ring is fitted inside the high-pressure bushing and located below the metal flange, and the free end of the double-ear auxiliary sling is hung on the auxiliary hook. One end of the guy rope is fixed to the double-eared sling, and the other end is a handheld control terminal for the worker.

[0007] Preferably, the first double-ear main sling, the second double-ear main sling, the double-ear auxiliary sling, and the double-ear wrap sling are all double-ear nylon slings covered with fine canvas.

[0008] Preferably, the lengths of the first double-ear main sling, the second double-ear main sling, and the double-ear auxiliary sling are 2–2.5 times the length of the high-pressure bushing.

[0009] Preferably, the outer walls of the first C-type washer and the second C-type washer are provided with U-shaped grooves.

[0010] Preferably, a visible position mark is provided at the midpoint between the first double-ear main strap and the second double-ear main strap.

[0011] Preferably, the first C-type washer and the second C-type washer are made of flexible materials, including elastic rubber, polyurethane or silicone.

[0012] Another objective of this utility model is to provide a method for lifting inclined high-pressure bushings without lifting rings using the aforementioned lifting tool for lifting inclined high-pressure bushings without lifting rings, comprising the following steps: S1. Select the first C-type washer and the second C-type washer, measure the outer diameter of the porcelain bushing and the outer diameter of the porcelain skirt between the bottom of the porcelain skirt of the high-pressure bushing and the metal flange, so that the length of the first C-type washer and the second C-type washer is slightly less than half of the outer diameter of the porcelain bushing between the bottom of the porcelain skirt of the high-pressure bushing and the metal flange, and the radial thickness is slightly greater than the difference between the outer diameter of the porcelain skirt of the high-pressure bushing and the outer diameter of the porcelain bushing between the bottom of the porcelain skirt of the high-pressure bushing and the metal flange. S2. Select the first double-ear main sling, the second double-ear main sling, and the double-ear auxiliary sling. Measure the length of the ceramic skirt and select the first double-ear main sling, the second double-ear main sling, and the double-ear auxiliary sling with a length of 2–2.5 times that of the high-pressure bushing. S3. Select a double-eared sling, measure the outer diameter of the upper neck of the high-pressure bushing, and wrap the double-eared sling around the upper neck of the high-pressure bushing at least once before the two lifting ears face the lifting direction of the high-pressure bushing. S4. Secure one end of the guy rope to the double-ear loop sling, and wrap the double-ear loop sling around the neck of the high-voltage bushing. S5. Form a loop at one end of the first double-ear main sling and the second double-ear main sling respectively and fit it into the groove of the first C-type washer and the second C-type washer. Then, pull the free ends of the first double-ear main sling and the second double-ear main sling out from the front and rear sides of the surrounding washer above the high-pressure bushing, cross each other, pass through the two lifting ears of the double-ear surrounding sling respectively, and hang them on the main hook. S6. Place one end of the double-ear auxiliary sling loop inside the high-pressure bushing and below the metal flange, and hang the free end of the double-ear auxiliary sling on the auxiliary hook. S7. Direct the crane to slowly and synchronously lift the main hook and auxiliary hook until the high-pressure bushing is off the ground and in a horizontal suspended position. Then, by continuing to lift the main hook or lowering the auxiliary hook, the bushing is gradually tilted. When the double-ear auxiliary slings are obviously loosened, the high-pressure bushing is rotated to the target angle. The crane's auxiliary hook continues to descend to an appropriate position above the high-pressure bushing. After manually removing the double-ear auxiliary slings, the high-pressure bushing is then lifted to the installation position for installation. S8. After installing the high-pressure bushing, control the main hook to descend above the high-pressure bushing installation point. The worker stands on the installed high-pressure bushing metal flange and manually removes the first and second main lifting straps in sequence. A designated person controls the double-ear loop lifting straps to gradually loosen them through the guy ropes, allowing the double-ear loop lifting straps to slide down the ceramic skirt to a suitable position above the installation point. The double-ear loop lifting straps slide down the ceramic skirt to the installation point, and the first and second double-ear main lifting straps are manually separated from the double-ear loop lifting straps, completing the removal of the lifting tools.

[0013] Preferably, in step S5, the disconnection points of the first C-type washer and the second C-type washer are located at the center above the high-pressure bushing.

[0014] This utility model discloses a lifting tool for inclined high-pressure bushings without lifting rings, which has the following beneficial effects.

[0015] This utility model provides circumferential support to the high-pressure bushing by setting a ring consisting of a first C-type washer and a second C-type washer between the ceramic skirt and the metal flange of the high-pressure bushing. The C-type washer is made of a flexible material (such as elastic rubber, polyurethane, or silicone). The first double-ear main lifting strap and the second double-ear main lifting strap do not compress the ceramic skirt, effectively buffering the concentrated stress on the ceramic skirt caused by the lifting force. This avoids damage to the ceramic skirt caused by excessive force concentration in the traditional "single-point lifting method" or the upward tension of the rope knot at the root of the ceramic skirt.

[0016] The first double-ear main sling and the second double-ear main sling of this utility model are respectively fixed in the grooves of the C-shaped washers on both sides. One end of the first double-ear main sling and the second double-ear main sling form a ring knot and is embedded in the grooves of the C-shaped washers on both sides. After the free ends of the slings cross, they pass through the two double ears, wrap around the two lifting ears of the slings, and are suspended from the main hook. This makes the high-pressure bushing symmetrically stressed on both sides during the hoisting process, and the force path is clear. It can effectively prevent eccentric stress during the hoisting of the bushing and improve the hoisting stability.

[0017] In this invention, the main hook and auxiliary hook are simultaneously and slowly lifted until the high-pressure bushing is off the ground and in a horizontal suspended position. Then, the angle of the high-pressure bushing is adjusted. The high-pressure bushing is kept in the air throughout the entire lifting process, which can effectively avoid stress on the equalizing ball and prevent damage to it.

[0018] This utility model features a guy rope with one end fixed to a double-eared sling, and the other end controlled by a worker. During the dismantling phase of the lifting equipment, the guy rope can be manually controlled from below the high-voltage bushing to dismantle the first main sling, the second main sling, and the double-eared sling. This eliminates the need for additional work at height by personnel and aerial work platforms, improving the efficiency of high-voltage bushing lifting. Furthermore, it completely eliminates the use of metal lifting equipment, effectively avoiding the risk of falling equipment damaging the ceramic skirt.

[0019] The components are mainly composed of nylon slings, flexible washers and guy ropes. They do not require complex and heavy metal structures or custom tooling. They can be quickly assembled and disassembled on site. The materials are lightweight and reusable, which significantly reduces construction costs and improves on-site work efficiency. Attached Figure Description

[0020] Figure 1 This is a front view of the high-pressure bushing of this utility model being lifted off the ground and in a horizontal suspended position.

[0021] Figure 2 This is a top view of the high-pressure bushing of this utility model being lifted off the ground and in a horizontally suspended position.

[0022] Figure 3 This is a frontal view of the high-pressure bushing after the angle of the present invention has been adjusted.

[0023] Figure 4This is a schematic diagram of the first double-ear main sling structure of this utility model.

[0024] In the attached image: 1. First double-ear main lifting sling; 101. Sling body; 102. Lifting lug; 2. Second double-ear main lifting sling; 3. Double-ear auxiliary lifting sling; 4. Double-ear wraparound lifting sling; 5. Guy rope; 6. Main hook; 7. Auxiliary hook; 8. Wraparound washer; 801. First C-type washer; 802. Second C-type washer; 9. High-pressure bushing; 901. Equalizing ball; 902. Metal flange; 903. Porcelain skirt; 904. Terminal block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Example 1 Please refer to Figures 1 to 3 A high-pressure bushing hoisting tool is used in high-pressure bushing hoisting scenarios without lifting rings, including: a first double-ear main sling 1, a second double-ear main sling 2, a double-ear auxiliary sling 3, a double-ear wraparound sling 4, a guy rope 5, and a wraparound washer 8. The surrounding gasket 8 includes a first C-type gasket 801 and a second C-type gasket 802, which are symmetrically arranged between the ceramic skirt 903 and the metal flange 902 of the high-pressure bushing 9. The outer walls of the first C-type gasket 801 and the second C-type gasket 802 are provided with grooves. The height of the outer wall of the surrounding gasket 8 is higher than the outer surface of the ceramic skirt 903. It should be understood that there is sufficient space between the porcelain skirt 903 and the metal flange 902 of the high-pressure bushing 9 to install the first C-type gasket 801 and the second C-type gasket 802. This part of the space only has the porcelain bushing and no porcelain skirt 903.

[0028] The first C-type gasket 801 and the second C-type gasket 802 are together arranged around the outer periphery of the high-pressure bushing 9 between the ceramic skirt 903 and the metal flange 902.

[0029] One end of the first double-ear main sling 1 and the second double-ear main sling 2 respectively forms a ring and fits into the grooves of the first C-type washer 801 and the second C-type washer 802. It should be noted that the first C-type washer 801 and the second C-type washer 802 are arranged opposite each other with their cut ends facing upwards. After they are joined together, they form an approximately circular structure. The first C-type washer 801 and the second C-type washer 802 are fixed between the ceramic skirt 903 and the metal flange 902 of the high-pressure bushing 9 by the first double-ear main sling 1 and the second double-ear main sling 2. It should be emphasized that when the first double-ear main sling 1 and the second double-ear main sling 2 are tightened, the first C-type washer 801 and the second C-type washer 802 can be stably fixed at the outer periphery between the ceramic skirt 903 and the metal flange 902 of the high-pressure bushing 9, without the need for additional fixing devices.

[0030] It should be noted that after one end of the first double-ear main sling 1 and the second double-ear main sling 2 passes through the other end, they form a loop knot that is embedded in the groove of the C-shaped washer on both sides.

[0031] The grooves machined on the outer walls of the first C-type washer 801 and the second C-type washer 802 are used to accommodate the first double-ear main sling 1 and the second double-ear main sling 2 loops. Their radial thickness is slightly greater than the difference between the outer diameter of the ceramic skirt 903 of the high-pressure bushing 9 and the outer diameter of the ceramic sleeve between the lowest end of the ceramic skirt 903 and the metal flange 902, so that its outer edge is higher than the outer edge of the ceramic skirt 903. This avoids direct contact between the first double-ear main sling 1 and the second double-ear main sling 2 and the ceramic skirt 903. The first double-ear main sling 1 and the second double-ear main sling 2 do not compress the ceramic skirt 903, effectively buffering the concentrated stress of the lifting force on the ceramic skirt 903, and avoiding damage to the ceramic skirt 903 caused by direct contact between the slings and the ceramic skirt 903 in traditional lifting.

[0032] Preferably, in this embodiment, the outer walls of the first C-type washer 801 and the second C-type washer 802 are provided with U-shaped grooves.

[0033] The double-eared sling 4 is wrapped around the neck of the high-voltage bushing 9, with the two lugs of the double-eared sling 4 facing the lifting direction of the high-voltage bushing 9; after the double-eared sling 4 is wrapped around the neck of the high-voltage bushing 9 at least once, the length of the connection section between the two lugs and the high-voltage bushing 9 is one-third of the length of the ceramic skirt 903.

[0034] It should be understood that the upper neck of the high-voltage bushing 9 only has a porcelain bushing and no porcelain skirt 903, and the double-ear sling 4 is wrapped around the porcelain bushing at the upper neck of the high-voltage bushing 9.

[0035] The free ends of the first double-ear main sling 1 and the second double-ear main sling 2 cross above the high-pressure bushing and then pass through the two lugs of the double-ear loop sling 4 respectively before being hung on the main hook 6. One end of the double-ear auxiliary sling 3 ring is fitted inside the high-pressure bushing 9 and closely attached to the lower part of the metal flange 902; the free end of the double-ear auxiliary sling 3 is hung on the auxiliary hook 7. The double-ear auxiliary sling 3 is used in conjunction with the first double-ear main sling 1 and the second double-ear main sling 2 to form two lifting points, thereby smoothly and horizontally lifting the high-pressure bushing 9. The angle is adjusted only after the high-pressure bushing 9 is sufficiently lifted off the ground, so as to avoid directly adjusting the angle and pressing the equalizing ball 901, which would cause it to be damaged.

[0036] One end of the guy rope 5 is connected to the double-ear loop sling 4 via a knot, and the other end is held by the worker to control the double-ear loop sling 4 to gradually loosen, so that the double-ear loop sling 4 slides down the ceramic skirt 903 to the installation point. The first double-ear main sling 1 and the second double-ear main sling 2 are manually separated from the double-ear loop sling 4, and the removal of the hoisting tools is completed.

[0037] Preferably, in this embodiment, the first double-ear main sling 1, the second double-ear main sling 2, the double-ear auxiliary sling 3, and the double-ear wrap-around sling 4 are all double-ear nylon slings covered with fine canvas; the first double-ear main sling 1, the second double-ear main sling 2, the double-ear auxiliary sling 3, and the double-ear wrap-around sling 4 have similar structures and are all double-ear slings; Figure 4 The first double-ear main sling 1 shown includes a sling body 101 and two lugs 102 integrally disposed at both ends of the sling body 101.

[0038] Preferably, in this embodiment, the lengths of the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3 are all 2–2.5 times the length of the high-pressure sleeve 9. Specifically, in this embodiment, the lengths of the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3 are all 2.1 times the length of the high-pressure sleeve 9.

[0039] Preferably, in this embodiment, a visible position mark is provided at the midpoint of the first double-ear main sling 1 and the second double-ear main sling 2 to facilitate finding the contact position between the first double-ear main sling 1, the second double-ear main sling 2 and the double-ear wraparound sling 4.

[0040] Preferably, in this embodiment, the first C-type washer 801 and the second C-type washer 802 are made of flexible materials, including elastic rubber, polyurethane or silicone.

[0041] The first double-ear main sling 1 and the second double-ear main sling 2 are respectively fixed in the grooves of the C-shaped washers on both sides. After the free ends of the slings cross, they pass through the two lugs of the double-ear loop sling 4 and are suspended from the main hook 6. This makes the high-pressure bushing 9 symmetrically stressed on both sides during the hoisting process, with a clear force path, which can effectively prevent eccentric stress during bushing hoisting and improve hoisting stability.

[0042] Example 2 Please refer to Figures 1 to 3 Based on Embodiment 1, this embodiment provides a method for lifting a high-pressure bushing without lifting rings using the aforementioned lifting tool for tilted high-pressure bushings. This method is applied to a scenario where the installation angle of the high-pressure bushing 9 is 30 degrees, i.e., the angle between the high-pressure bushing 9 and the horizontal is 60°. The method includes the following steps: S1. Select the first C-type washer 801 and the second C-type washer 802. Measure the outer diameter of the porcelain sleeve between the lowest end of the porcelain skirt 903 of the high-pressure bushing 9 and the metal flange 902, and the outer diameter of the porcelain skirt 903. Make the length of the first C-type washer 801 and the second C-type washer 802 slightly less than half the outer diameter of the porcelain sleeve between the lowest end of the porcelain skirt 903 of the high-pressure bushing 9 and the metal flange 902, and make their radial thickness slightly greater than the difference between the outer diameter of the porcelain skirt 903 of the high-pressure bushing 9 and the outer diameter of the porcelain sleeve between the lowest end of the porcelain skirt 903 of the high-pressure bushing 9 and the metal flange 902. S2. Select the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3. Measure the length of the ceramic skirt 903 and select the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3 with a length of 2–2.5 times that of the ceramic skirt 903. Specifically, in this embodiment, the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3 are all selected with a length of 2.1 times that of the ceramic skirt 903. This ensures that when disassembling and lifting tools, the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear auxiliary sling 3 have sufficient length to reach a height where workers can operate below the main hook 6 and the auxiliary hook 7.

[0043] S3. Select double-ear sling 4, measure the outer diameter of the upper neck of the high-pressure bushing 9, and after the double-ear sling 4 is wrapped around the upper neck of the high-pressure bushing 9 at least once, the two lifting ears face the lifting direction of the high-pressure bushing 9, and the length of the connection section between the two lifting ears and the high-pressure bushing 9 is one-third of the length of the ceramic skirt 903. It should be noted that the length of the connection section between the two lifting lugs and the high-pressure bushing 9 after the double-ear sling 4 is wrapped around the upper neck of the high-pressure bushing 9 at least once is measured by setting out based on the inclination angle of the high-pressure bushing to be lifted. In this embodiment, the high-pressure bushing is at an angle of approximately 60° to the horizontal.

[0044] S4. Secure one end of the guy rope 5 to the double-ear loop sling 4, and wrap the double-ear loop sling 4 around the neck of the high-voltage bushing 9. S5. Form a loop at one end of the first double-ear main sling 1 and the second double-ear main sling 2 and fit it into the groove of the first C-type washer 801 and the second C-type washer 802. Then, pull the free ends of the first double-ear main sling 1 and the second double-ear main sling 2 out from the front and rear sides of the surrounding washer 8 above the high-pressure sleeve 9 and cross each other. After passing through the two lugs of the double-ear surrounding sling 4, they are hung on the main hook 6. The two lugs of the double-ear surrounding sling 4 are respectively fitted at the midpoint of the first double-ear main sling 1 and the second double-ear main sling 2. Preferably, in this embodiment, in S5, the disconnection position of the first C-type washer 801 and the second C-type washer 802 is located at the center above the high-pressure bushing 9.

[0045] The first double-ear main sling 1 and the second double-ear main sling 2 of this utility model are respectively fixed in the grooves of the C-shaped washers on both sides. After the free ends of the slings cross, they pass through the two lifting ears of the double-ear wrap sling 4 and are suspended from the main hook 6. This makes the high-pressure bushing 9 symmetrically stressed on both sides during the hoisting process, with a clear force path, which can effectively prevent eccentric stress during bushing hoisting and improve hoisting stability.

[0046] S6. Fit one end of the double-ear auxiliary sling 3 ring inside the high-pressure bushing 9 and below the metal flange 902. Hang the free end of the double-ear auxiliary sling 3 on the auxiliary hook 7. The double-ear auxiliary sling 3, the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear loop sling 4 form a three-section hoisting structure. S7. The crane operator slowly and synchronously lifts the main hook 6 and auxiliary hook 7 until the high-pressure bushing 9 is off the ground and in a horizontal suspended position. Then, by continuing to lift the main hook 6 or lowering the auxiliary hook 7, the bushing is gradually tilted. When the double-ear auxiliary sling 3 is significantly loosened, the high-pressure bushing 9 is rotated to the target angle. In this embodiment, the angle between the high-pressure bushing 9 and the horizontal is approximately 60°, and the terminal block 904 is facing upward. It should be noted that although the first double-ear main sling 1 and the second double-ear main sling 2 only pass through the two lugs of the double-ear wrap sling 4 and are not directly fixed to the two lugs of the double-ear wrap sling 4, the weight of the high-pressure bushing 9 itself will exert a pulling force on the double-ear wrap sling 4. In addition, the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear wrap sling 4 are all double-ear nylon slings wrapped with fine canvas. When the forces are balanced, their friction is sufficient to effectively prevent the two lugs of the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear wrap sling 4 from sliding relative to each other. The auxiliary hook 7 continues to descend to above the installation point of the high-pressure bushing 9. The double-ear auxiliary slings 3 are manually removed. At this time, the high-pressure bushing 9 is hoisted to the installation position for installation. S8. After installing the high-pressure bushing 9, control the main hook 6 to descend above the installation point of the high-pressure bushing 9. Manually remove the first main sling and the second main sling in sequence. A designated person controls the double-ear loop sling 4 to gradually loosen it through the guy rope 5, so that the double-ear loop sling 4 slides down the ceramic skirt 903 to the installation point. Manually separate the first double-ear main sling 1 and the second double-ear main sling 2 from the double-ear loop sling 4, and complete the removal of the lifting tools. The whole process is safe, stable and controllable.

[0047] Specifically, after installing the high-pressure bushing 9, when removing the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear loop sling 4, the workers stand on the metal flange 902 of the installed high-pressure bushing 9 and direct the main hook 6 to descend to a suitable position above the high-pressure bushing 9, that is, the workers can reach out and touch the main hook 6. The first double-ear main sling 1 and the second double-ear main sling 2 on the main hook 6 are removed manually in sequence. Then, a designated person controls the double-ear loop sling 4 to slide down along the ceramic skirt 9 of the high-pressure bushing to a suitable position, that is, the workers can reach out and touch it. Finally, the first double-ear main sling 1, the second double-ear main sling 2, and the double-ear loop sling 4 are manually separated to complete the removal of the lifting tools.

[0048] One end of the guy rope 5 of this utility model is connected to the double-eared sling 4 by a knot, and the other end is controlled by the worker. During the dismantling of the lifting tools, the guy rope 5 can be manually controlled to dismantle the first main sling, the second main sling, and the double-eared sling 4. No additional climbing work is required with the help of personnel and aerial work platform vehicles, which improves the lifting efficiency of the high-voltage bushing 9. Moreover, it does not use metal lifting tools at all, which effectively avoids the risk of the lifting tools falling and damaging the ceramic skirt 903.

[0049] The components are mainly composed of nylon slings, flexible washers and guy ropes. They do not require complex and heavy metal structures or custom tooling. They can be quickly assembled and disassembled on site. The materials are lightweight and reusable, which significantly reduces construction costs and improves on-site work efficiency.

[0050] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Substitutions may include replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the scope of protection of this utility model.

Claims

1. A lifting tool for tilting high-pressure bushings without lifting rings, characterized in that, include: First double-ear main sling, second double-ear main sling, double-ear auxiliary sling, double-ear wrap sling, guy rope, wrap washer; The surrounding gasket includes a first C-shaped gasket and a second C-shaped gasket, which are symmetrically arranged between the ceramic skirt and the metal flange of the high-pressure bushing. The outer walls of the first C-shaped gasket and the second C-shaped gasket are provided with grooves. The outer wall height of the surrounding gasket is higher than the outer surface of the ceramic skirt. One end of the first double-ear main sling and one end of the second double-ear main sling form a loop and fit into the groove of the first C-shaped washer and the second C-shaped washer, respectively; The double-ear sling is wrapped around the neck of the high-voltage bushing, with the two lugs of the double-ear sling facing the lifting direction of the high-voltage bushing. The free ends of the first double-ear main sling and the second double-ear main sling cross above the high-pressure bushing and then pass through the two lugs of the double-ear loop sling respectively before being hung on the main hook; One end of the double-ear auxiliary sling ring is fitted inside the high-pressure bushing and located below the metal flange, and the free end of the double-ear auxiliary sling is hung on the auxiliary hook. One end of the guy rope is fixed to the double-eared sling, and the other end is a handheld control terminal for the worker.

2. The lifting tool for tilting high-pressure bushings without lifting rings as described in claim 1, characterized in that, The first double-ear main sling, the second double-ear main sling, the double-ear auxiliary sling, and the double-ear wrap sling are all double-ear nylon slings with an outer layer of fine canvas.

3. The lifting tool for tilting high-pressure bushings without lifting rings as described in claim 1, characterized in that, The lengths of the first double-ear main sling, the second double-ear main sling, and the double-ear auxiliary sling are 2–2.5 times the length of the high-pressure bushing.

4. The lifting tool for tilting high-pressure bushings without lifting rings as described in claim 1, characterized in that, The outer walls of the first C-type washer and the second C-type washer are provided with U-shaped grooves.

5. The lifting tool for tilting high-pressure bushings without lifting rings as described in claim 1, characterized in that, A visible position mark is provided at the midpoint between the first double-ear main sling and the second double-ear main sling.

6. The lifting tool for tilting high-pressure bushings without lifting rings as described in claim 1 or 4, characterized in that, The first C-type washer and the second C-type washer are made of flexible materials, including elastic rubber, polyurethane or silicone.

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