220kV and below strain single-string insulator replacement wing-shaped clamp and use method thereof

Abstract

The invention relates to the technical field of power transmission line insulator replacement operation, and provides a 220kV and below strain single-string insulator replacement wing-shaped clamp and a use method thereof, a screw rod is embedded in a wing-shaped clamp, during insulator replacement operation, an operator only needs to hold a device main body to mount the device, a first insulator cannot be short-circuited, and the device is convenient to use. The safety of live insulator replacement operation is improved; a worm gear and a worm are adopted for transmission when the screw rod is tightened, the transmission ratio of the worm gear and the worm can be designed to be large, the screw rod can be tightened by rotating the driving block with small force during operation, and load transfer can be realized when an insulator is replaced by using an electric wrench, so that the labor intensity of operating personnel is reduced, and the working efficiency is improved. The time for tightening the screw rod is saved; the transmission shaft is used for driving the two lead screws to be tightened at the same time, tightening of the lead screws is even in force application and synchronous in movement, torque deviation generated by manual operation is avoided, and the risks of tool replacement and equipment damage are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of replacing insulators in power transmission lines, in particular to a wing-shaped fixture for replacing a 220 kV and below tension single-string insulator and a method for using the same. Background Art

[0002] Tension single string insulators are key insulating components in transmission lines. Their main functions include:

[0003] Supporting conductors: Tension single-string insulators can withstand the weight of the conductors and external forces such as wind, ensuring that the conductors remain in a stable suspended state during operation and preventing the conductors from sagging or breaking due to external forces. Insulation performance: The main function of the insulator is electrical insulation, preventing current from leaking to the tower or the ground, thereby protecting the safe operation of the equipment and reducing the risk of electrical short circuits and leakage. Resisting external interference: Tension single-string insulators can also withstand various interferences in the natural environment, such as wind, rain, snow, etc., to ensure the normal operation of power lines under severe weather conditions. Maintaining line stability: Tension single-string insulators can maintain a reasonable spacing between conductors, avoid interference between adjacent conductors, and ensure the stability and reliability of the power system.

[0004] During long-term use, the performance of single-string tension insulators will gradually decline due to environmental factors and electrical stress. The specific reasons include:

[0005] Aging and wear: Insulators are affected by environmental factors such as ultraviolet rays, temperature changes, humidity, and chemicals, which can cause the material to age, become brittle, or peel off, thereby reducing its insulation performance and mechanical strength. Electrical breakdown: In long-term power operation, insulators may suffer electrical breakdown due to excessive voltage or degradation of insulating materials, which will directly lead to current leakage, equipment damage, and even electrical accidents. Mechanical fatigue: Because insulators bear mechanical loads such as the gravity of the conductors and external wind forces, over time, the material may fatigue and microcrack, affecting its carrying capacity. Safety hazards: Aging and damaged insulators may increase the risk of failure in the power system and may even cause power accidents, endangering equipment safety and personnel safety.

[0006] Therefore, insulators need to be replaced and maintained regularly. At present, the tools used for live replacement of single-string tension insulators of voltage levels of 220kV and below are wing-shaped clips, double pull plates and bottle supports. The replacement tools are still divided according to voltage levels. Three sets of tools are required to replace insulators of voltage levels of 220kV and below.

[0007] The following are the main problems with the current operating tools: When replacing the wing-shaped clamps used for tension single-string insulators, the tightening screw is at the front end of the clamp, and the front end of the screw is connected to the pull plate. When the operator installs the tool, he must hold the connection between the screw and the pull plate to install it, and the screw handle is also at the front end. When tightening the screw, the operator must operate in front of the wing-shaped clamp. This method of tightening the screw by the operator will result in uneven force on the load-bearing tool during tightening, which may cause damage to the load-bearing tool and equipment. This tool not only brings certain difficulties to the operator during installation and operation, but also short-circuits the first insulator on the crossarm side, bringing safety risks to the operation.

[0008] Based on this, the present invention provides a 220kV and below single-string tension insulator replacement wing-shaped fixture and its use method to avoid uneven force on the load-bearing tools during tightening, while avoiding short-circuiting the first insulator on the crossarm side, thereby reducing the risk of replacing single-string tension insulators. Summary of the invention

[0009] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a 220kV and below single-string tension insulator replacement wing-shaped clamp and its use method to avoid uneven force on the load-bearing tools during tightening, while avoiding short-circuiting the first insulator on the crossarm side during operation, thereby reducing the risk of replacing single-string tension insulators.

[0010] In order to achieve the above object, the present invention adopts the following technical solutions:

[0011] A wing-shaped fixture for replacing a single-string tension insulator of 220 kV and below, comprising: a wing-shaped frame body, a transmission platform arranged on the top of the wing-shaped frame body, two screw rod nesting holes respectively arranged on both sides of the wing-shaped frame body, a screw rod tightening device arranged on the top of the screw rod nesting hole, and a transmission shaft connecting the screw rod tightening device and the transmission platform;

[0012] A set of screw tightening devices is respectively provided on the two screw nesting holes, and a connecting hardware is fixedly connected to the top of the screw tightening device; the transmission platform simultaneously drives the screw tightening devices arranged above the two screw nesting holes through the transmission shaft.

[0013] Preferably, a groove is provided on the wing frame body, and the groove is clamped with the connection hardware of the tension insulator string to be replaced; support plates are provided on both sides of the wing frame body, and the ends of the support plates are fixedly connected to the screw rod nesting holes, and fixing bolts are provided on the side walls of the groove.

[0014] Preferably, the transmission platform comprises: a connecting seat fixedly connected to the top of the airfoil frame body, an active bevel gear, a driven bevel gear and a driving block; the active bevel gear and the driven bevel gear are rotatably connected to the connecting seat; the active bevel gear and the driven bevel gear are axially crossed at 90°, the active bevel gear is meshed with the driven bevel gear shaft, the driving block is fixedly connected to the active bevel gear, and one end of the driving block passes through the connecting seat; the driven bevel gear is sleeved with the transmission shaft.

[0015] Preferably, a worm is provided at each end of the transmission shaft, and the worm drives the screw tightening device.

[0016] Preferably, the screw tightening device includes: a connecting sleeve fixedly connected to the screw nesting hole, a mounting seat arranged on the top of the connecting sleeve, a worm wheel rotatably connected to the mounting seat, and a screw sleeved with the worm wheel; the worm wheel is meshed with the worm, the worm wheel and the worm axially cross at 90°, and the worm is rotatably connected to the mounting seat; the worm wheel and the screw sleeve position are provided with an internal thread matching the screw; the top end of the screw is fixedly connected to the connecting hardware.

[0017] Preferably, two ends of the worm and worm wheel are provided with extension parts, bearings are sleeved on the extension parts, and the outer ring of the bearing is connected to the mounting seat.

[0018] Preferably, the connecting fitting is provided with a connecting hole.

[0019] Preferably, the driving block is a hexagonal prism, and a detachable operating handle is provided on the outside of the driving block.

[0020] Another object of the present invention is to provide a method for replacing a 220 kV and below tension single string insulator, using the above-mentioned 220 kV and below tension single string insulator replacement wing clamp, comprising the following steps:

[0021] S1. Insert the connection fitting of the tension insulator string to be replaced into the groove in the middle of the inner wing frame body, and use fixing bolts to lock and fix the wing frame body and the connection fitting;

[0022] S2. Connect the connection fittings to the load-bearing tool used to replace the insulator;

[0023] S3. Use the operating handle or electric wrench to rotate the drive block, the drive block drives the active bevel gear to rotate, the active bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the transmission shaft to rotate, the transmission shaft drives the worms at both ends to rotate, the worm drives the worm wheels of the two sets of screw tightening devices to rotate, the worm wheels drive the screw to move axially along the screw nesting hole, and the function of synchronously tightening the screw tightening devices on both sides of the wing-shaped card is realized;

[0024] S4. Dismantle and replace single-string tension insulators;

[0025] S5. Separate the connection fittings of the tension insulator string to be replaced from the main body of the wing frame.

[0026] The present invention discloses an overhead line maintenance operation method combining a lifting device with a lateral walking device, which has the following beneficial effects.

[0027] The present invention is more convenient to use: compared with the traditional wing-shaped card, the operator needs to hold the connection between the screw rod and the pull plate to install it. In the present device, the screw rod is embedded in the wing-shaped card. When replacing the insulator, the operator only needs to hold the main body of the device to install it, and the first insulator will not be short-circuited, which improves the safety of the live insulator replacement operation;

[0028] The operation of the screw rod is easy: compared with the traditional wing-shaped clamp, the operator needs to tighten the screw rod with both hands in front of the wing-shaped clamp (even if the screw rod moves linearly along the axial direction of the screw rod nesting hole, tightening the screw rod specifically refers to the screw rod moving linearly along the side away from the load-bearing tool). There will be uneven force on the load-bearing tool during tightening, which may cause damage to the load-bearing tool and equipment. The device uses a worm gear to drive when tightening the screw rod. Since the worm gear transmission ratio can be designed to be very large, only a small force is needed to rotate the drive block during operation to tighten the screw rod, and an electric wrench can be used for control to achieve load transfer when replacing insulators. This operation method not only reduces the labor intensity of the operator, but also saves time for tightening the screw rod;

[0029] Synchronous tightening screws: The present invention uses a transmission shaft to simultaneously drive two screws to tighten. The tightening screws exert force evenly and move synchronously, avoiding torque deviation caused by manual operation and reducing the risk of tool replacement and equipment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram of the overall structure of the wing-shaped fixture for replacing 220 kV and below single-string tension insulators according to the present invention.

[0031] Figure 2 The figure is a schematic side view of the overall structure of the wing-shaped fixture for replacing 220 kV and below single-string tension insulators of the present invention.

[0032] Figure 3 This is another overall structural schematic diagram of the wing-shaped fixture for replacing 220kV and below single-string tension insulators of the present invention.

[0033] Figure 4 This is a schematic diagram of the cooperation between the transmission platform and the screw tightening device for replacing the wing-shaped fixture of the 220kV and below single-string tension insulator of the present invention.

[0034] Figure 5 This is another schematic diagram of the coordination between the transmission platform and the screw tightening device for replacing the wing-shaped fixture of the 220kV and below single-string tension insulator of the present invention.

[0035] In the attached drawings: 1-wing frame body; 11-groove; 12-support plate; 2-transmission platform; 21-connecting seat; 22-active bevel gear; 23-driven bevel gear; 24-driving block; 25-bearing; 26-protective cover; 3-transmission shaft; 4-worm; 5-screw rod nesting hole; 6-screw rod tightening device; 61-connecting sleeve; 62-mounting seat; 63-worm wheel; 64-screw rod; 7-connecting hardware; 8-operating handle; 81-rotating sleeve; 9-fixing bolt. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0038] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0039] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0040] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] Example 1

[0042] Reference Figure 1 A wing-shaped fixture for replacing a single-string tension insulator of 220 kV and below, comprising: a wing-shaped frame body 1, a transmission platform 2 arranged at the top of the wing-shaped frame body 1, two screw rod 64 nesting holes 5 respectively arranged on both sides of the wing-shaped frame body 1, a screw rod 64 tightening device 6 arranged at the top of the screw rod 64 nesting hole 5, and a transmission shaft 3 connecting the screw rod 64 tightening device 6 and the transmission platform 2; in this embodiment, the wing-shaped fixture has a rated load of 30 kN, is made of high-strength alloy material, and has a weight controlled within 5 kg, which can meet the load transfer requirements when replacing a single-string tension insulator, and is light enough to be carried by operators, thereby reducing the labor intensity of operators. It should be understood that the transmission platform 2 will not affect the connection between the wing-shaped frame body 1 and the connection hardware 7 of the string of tension insulators to be replaced.

[0043] Please refer to Figure 3 A group of screw rod 64 tightening devices 6 are respectively provided on the two screw rod 64 nesting holes 5, that is, a group of screw rod 64 tightening devices 6 are provided on the left and right sides of the wing frame, and a connecting hardware 7 is fixedly connected to the top of the screw rod 64 tightening device 6; the transmission platform 2 simultaneously drives the screw rod 64 tightening device 6 arranged above the two screw rod 64 nesting holes 5 through the transmission shaft 3. The transmission platform 2 serves as a power output source and simultaneously drives the screw rod 64 tightening devices 6 provided on the left and right sides of the wing frame to tighten the screw rod 64. When tightening, the tightening distances of the screw rod 64 tightening devices 6 on the left and right sides of the wing frame are equal, the tightening screw rod 64 exerts force evenly and moves synchronously, avoiding torque deviation caused by manual operation, simple operation, and can reduce the risk of tool replacement and equipment damage.

[0044] Compared with the traditional wing-shaped card, the operator needs to hold the connection between the screw rod 64 and the pull plate to install. In this device, the screw rod 64 is embedded in the wing-shaped card. When replacing the insulator, the operator only needs to hold the main body of the device to install it, and the first insulator will not be short-circuited, which improves the safety of live insulator replacement.

[0045] Please refer to Figure 3 As a preferred embodiment, in this embodiment, a groove 11 is provided on the airfoil frame body 1, and the groove 11 is clamped with the connection fitting 7 of the tension insulator string to be replaced; a fixing bolt 9 is provided on the side wall of the groove 11, and the fixing bolt 9 is used to clamp and fix the connection fitting 7 of the tension insulator string to be replaced in the groove 11. Support plates 12 are provided on both sides of the airfoil frame body 1, and the ends of the support plates 12 are fixedly connected with the nesting holes 5 of the screw rod 64. As an option, the support plates 12 can be integrally set with the airfoil frame body 1, but it should be noted that the axis of the nesting hole 5 of the screw rod 64 needs to coincide with the axis of the load-bearing tool, so as to ensure the stability of the tightening screw rod 64 when exerting force and improve the use effect.

[0046] Please refer to Figure 3 and Figure 4 As a preference, in this embodiment, the transmission platform 2 comprises: a connection seat 21 fixedly connected to the top of the airfoil frame body 1, an active bevel gear 22, a driven bevel gear 23 and a driving block 24; in this embodiment, the connection seat 21 is a rectangular shell, and a protective cover 26 is provided on the connection seat 21 to prevent foreign matter from entering the transmission part, and the active bevel gear 22 and the driven bevel gear 23 are rotatably connected to the connection seat 21; the active bevel gear 22 and the driven bevel gear 23 are axially crossed at 90°, and the active bevel gear 22 and the driven bevel gear 23 are axially meshed. As an implementation method, the active bevel gear 22 is placed on the connection seat 21 away from the groove 11 of the airfoil frame body 1. The driven bevel gear 23 is placed on the side wall of the connecting seat 21 adjacent to the left and right sides of the active bevel gear 22. The connecting seat 21 and the active bevel gear 22 and the driven bevel gear 23 are connected at the positions with bearings 25 to ensure smooth transmission. In order to facilitate the rotation of the active bevel gear 22, the driving block 24 is fixedly connected to the active bevel gear 22, and one end of the driving block 24 passes through the connecting seat 21. The driving bevel gear 22 can be directly rotated by the driving block 24 as a power source for replacing the wing-shaped fixture of the tension single-string insulator. The driven bevel gear 23 is sleeved with the transmission shaft 3, and both ends of the transmission shaft 3 pass through the connecting seat 21. The transmission shaft 3 is rotatably connected to the connecting seat 21 through the bearings 25.

[0047] The driving method of the transmission platform 2 is as follows: the operating handle 8 or the electric wrench is used to rotate the driving block 24, the driving block 24 drives the active bevel gear 22 to rotate, the active bevel gear 22 drives the driven bevel gear 23 to rotate, and the driven bevel gear 23 drives the transmission shaft 3 to rotate.

[0048] Please refer to Figure 4 and Figure 5 Preferably, in this embodiment, a worm 4 is provided at both ends of the transmission shaft 3, and the worm 4 drives the screw 64 tightening device 6, that is, the worm 4 serves as the output power source of the transmission platform 2 and the input power source of the screw 64 tightening device 6.

[0049] Please refer to Figure 4 and Figure 5 Preferably, in this embodiment, the screw 64 tightening device 6 comprises: a connecting sleeve 61 fixedly connected to the screw 64 nesting hole 5, a mounting seat 62 arranged at the top of the connecting sleeve 61, a worm wheel 63 rotatably connected to the mounting seat 62, and a screw 64 sleeved with the worm wheel 63; the connecting sleeve 61 is hollow inside, and the connecting sleeve 61 is cylindrical and its axis coincides with the screw 64 nesting hole 5; the mounting seat 62 is divided into a worm wheel 63 mounting part and a worm 4 mounting part, the worm wheel 63 is meshed with the worm 4, the worm wheel 63 and the worm 4 axially intersect at 90°, the intersection angle is fixed by the mounting seat 62, and the worm 4 is rotatably connected to the mounting seat 62 through the bearing 25; the worm wheel 63 and the screw 64 sleeve position are provided with an internal thread matching the screw 64; the top of the screw 64 is fixedly connected to the connecting hardware 7.

[0050] Please refer to Figure 5 Preferably, in this embodiment, both ends of the worm 4 and the worm wheel 63 are provided with extension parts, and bearings 25 are sleeved on the extension parts, and the outer ring of the bearing 25 is connected to the mounting seat 62.

[0051] Please refer to Figure 2 Preferably, in the present embodiment, the driving block 24 is a hexagonal prism, and a detachable operating handle 8 is provided on the outside of the driving block 24. A rotating sleeve 81 is provided at the end of the operating handle 8 to facilitate the rotation of the driving block 24. The driving block 24 can also be driven by an electric wrench.

[0052] When it is necessary to tighten the screw rod 64, use the operating handle 8 or the electric wrench to rotate the driving block 24, the driving block 24 drives the active bevel gear 22 to rotate, the active bevel gear 22 drives the driven bevel gear 23 to rotate, the driven bevel gear 23 drives the transmission shaft 3 to rotate, the transmission shaft 3 drives the worm 4 at both ends to rotate, the worm 4 drives the worm gear 63 of the two sets of screw rods 64 tightening devices 6 to rotate, the worm gear 63 drives the screw rod 64 to move axially along the screw rod 64 nesting hole 5, that is, the screw rod 64 moves linearly along the axis direction of the load-bearing tool, thereby realizing the function of synchronously tightening the screw rods 64 tightening devices 6 on both sides of the wing-shaped card.

[0053] When tightening the screw rod 64, the device adopts the worm wheel 63 and the worm 4 for transmission. Since the transmission ratio of the worm wheel 63 and the worm 4 can be designed to be very large, only a small force is needed to rotate the driving block 24 during operation to tighten the screw rod 1, and an electric wrench can be used for control to achieve the load transfer when replacing the insulator. This operation method not only reduces the labor intensity of the operators, but also saves the time of tightening the screw rod 1.

[0054] Example 2

[0055] Based on Example 1, this embodiment provides a method for replacing a 220 kV and below tension single string insulator, using the above-mentioned 220 kV and below tension single string insulator replacement wing clamp, including the following steps:

[0056] S1, insert the connection fitting 7 of the tension insulator string to be replaced into the groove 11 opened in the middle of the inner wing frame body 1, and use the fixing bolts 9 to lock and fix the wing frame body 1 and the connection fitting 7;

[0057] S2, connect the connection fitting 7 to the load-bearing tool for replacing the insulator;

[0058] S3. Use the operating handle 8 or the electric wrench to rotate the driving block 24, the driving block 24 drives the active bevel gear 22 to rotate, the active bevel gear 22 drives the driven bevel gear 23 to rotate, the driven bevel gear 23 drives the transmission shaft 3 to rotate, the transmission shaft 3 drives the worm 4 at both ends to rotate, the worm 4 drives the worm wheel 63 of the two sets of screw rods 64 tightening devices 6 to rotate, the worm wheel 63 drives the screw rod 64 to move axially along the screw rod 64 nesting hole 5, so as to realize the function of synchronously tightening the screw rods 64 tightening devices 6 on both sides of the wing-shaped card;

[0059] Compared with the traditional wing-shaped card, the operator needs to hold the connection between the screw rod 64 and the pull plate to install it. In this device, the screw rod 64 is embedded in the wing-shaped card. When replacing the insulator, the operator only needs to hold the main body of the device to install it, and the first insulator will not be short-circuited, which improves the safety of live replacement of insulators. When tightening the screw rod 64, the worm gear 63 and worm 4 are used for transmission. Since the transmission ratio of the worm gear 63 and worm 4 can be designed to be very large, only a small force is needed to rotate the drive block 24 during operation to tighten the screw rod 1, and an electric wrench can be used for control to achieve load transfer when replacing the insulator. This operation method not only reduces the labor intensity of the operator, but also saves the time for tightening the screw rod 1.

[0060] S4. Dismantle and replace single-string tension insulators;

[0061] S5. Separate the connection fittings 7 of the tension insulator string to be replaced from the wing frame body 1.

[0062] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The substitution may be a substitution of a part of the structure, device, method step, or a complete technical solution. Any equivalent replacement or change according to the technical solution and the inventive concept of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A wing-shaped fixture for replacing single-string tension insulators of 220 kV and below, characterized in that: include: An airfoil frame body, a transmission platform disposed on the top of the airfoil frame body, two screw rod nesting holes disposed on both sides of the airfoil frame body, a screw rod tightening device disposed on the top of the screw rod nesting holes, and a transmission shaft connecting the screw rod tightening device and the transmission platform; A set of screw tightening devices is respectively provided on the two screw nesting holes, and a connecting hardware is fixedly connected to the top of the screw tightening device; the transmission platform simultaneously drives the screw tightening devices arranged above the two screw nesting holes through the transmission shaft.

2. The wing-shaped fixture for replacing single-string tension insulators of 220 kV and below as claimed in claim 1 is characterized in that: The wing-shaped frame body is provided with a groove, which is clamped with the connection hardware of the tension insulator string to be replaced; support plates are provided on both sides of the wing-shaped frame body, the ends of the support plates are fixedly connected to the screw rod nesting holes, and fixing bolts are provided on the side walls of the groove.

3. The wing-shaped fixture for replacing a single-string tension insulator of 220 kV and below as claimed in claim 1 is characterized in that: The transmission platform comprises: a connecting seat fixedly connected to the top of the airfoil frame body, an active bevel gear, a driven bevel gear and a driving block; the active bevel gear and the driven bevel gear are rotatably connected to the connecting seat; the active bevel gear and the driven bevel gear are axially crossed at 90 degrees, the active bevel gear is meshed with the driven bevel gear shaft, the driving block is fixedly connected to the active bevel gear, and one end of the driving block passes through the connecting seat; the driven bevel gear is sleeved with the transmission shaft.

4. The wing-shaped fixture for replacing a single-string tension insulator of 220 kV and below as claimed in claim 3 is characterized in that: A worm is provided at each end of the transmission shaft, and the worm drives a screw tightening device.

5. The wing-shaped fixture for replacing single-string tension insulators of 220 kV and below as claimed in claim 4 is characterized in that: The screw tightening device includes: a connecting sleeve fixedly connected to the screw embedding hole, a mounting seat arranged on the top of the connecting sleeve, a worm wheel rotatably connected to the mounting seat, and a screw sleeved with the worm wheel; the worm wheel is meshed with the worm, the worm wheel and the worm axially intersect at 90 degrees, and the worm is rotatably connected to the mounting seat; the worm wheel and the screw sleeve position are provided with an internal thread matching the screw; the top end of the screw is fixedly connected to the connecting hardware.

6. The wing-shaped fixture for replacing single-string tension insulators of 220 kV and below as claimed in claim 5, characterized in that: Extension parts are arranged at both ends of the worm and worm wheel, bearings are sleeved on the extension parts, and the outer ring of the bearing is connected to the mounting seat.

7. The wing-shaped fixture for replacing single-string tension insulators of 220 kV and below as claimed in claim 1 or 5, characterized in that: The connecting fitting is provided with a connecting hole.

8. The wing-shaped fixture for replacing single-string tension insulators of 220 kV and below as claimed in claim 5, characterized in that: The driving block is a hexagonal prism, and a detachable operating handle is provided on the outside of the driving block.

9. A method for replacing a 220 kV and below single-string tension insulator, using the 220 kV and below single-string tension insulator replacement wing-shaped fixture according to any one of claims 1 to 8, characterized in that: The steps include: S1. Insert the connection fitting of the tension insulator string to be replaced into the groove in the middle of the inner wing frame body, and use fixing bolts to lock and fix the wing frame body and the connection fitting; S2. Connect the connection fittings to the load-bearing tool used to replace the insulator; S3. Use the operating handle or electric wrench to rotate the drive block, the drive block drives the active bevel gear to rotate, the active bevel gear drives the driven bevel gear to rotate, the driven bevel gear drives the transmission shaft to rotate, the transmission shaft drives the worms at both ends to rotate, the worm drives the worm wheels of the two sets of screw tightening devices to rotate, the worm wheels drive the screw to move axially along the screw nesting hole, and the function of synchronously tightening the screw tightening devices on both sides of the wing-shaped card is realized; S4. Dismantle and replace single-string tension insulators; S5. Separate the connection fittings of the tension insulator string to be replaced from the main body of the wing frame.

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