750 kilovolt power transmission line tension yoke plate replacement device

Abstract

The invention relates to the technical field of replacement devices for power transmission lines, in particular to a 750kV power transmission line tension yoke plate replacement device. The device comprises an upper-layer plate and a lower-layer plate, the left ends of the upper-layer plate and the lower-layer plate are fixedly provided with pull rods respectively, the right ends of the upper-layer plate and the lower-layer plate are fixedly installed together through at least two traction plates, the upper end face of the left portion of the upper-layer plate is fixedly provided with a photovoltaic assembly, and the right portion of the upper-layer plate is fixedly provided with an electromagnetic lock body. And an electromagnetic lock armature is fixedly arranged on the lower layer plate at the corresponding position. The device is reasonable and compact in structure and convenient to use, the upper-layer plate, the lower-layer plate and the traction plate are used in cooperation, the strain yoke plate can be rapidly replaced under the condition that the LF yoke plate has no construction hole or the construction hole is unreasonable, the device has the advantages of being safe and reliable, operation is convenient, and working efficiency is improved; and meanwhile, the safety specification of high-voltage operation is met, the safety of workers during high-voltage operation is ensured, and the labor cost and the construction risk are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of replacement devices for power transmission lines, in particular to a replacement device for tension joint plates of a 750 kV power transmission line. Background Art

[0002] The conductor tension string is a key component in the transmission line, which is used to connect and fix the transmission line conductors to ensure that they remain stable under various environmental and load conditions. It is usually composed of tension clamps, insulator strings and connecting hardware, and is mainly installed at the tension section of poles and towers. The main function of the conductor tension string is to withstand the tension of the conductor and transfer it to the pole or tower to ensure the mechanical strength and electrical insulation performance of the line. The design and selection of the tension string needs to consider factors such as the voltage level, mechanical load and operating environment of the line to ensure the safe and reliable operation of the transmission line.

[0003] Transmission lines are in harsh natural environments for a long time. As time goes by, the connecting hardware, tension plates and other components in the tension strings are prone to varying degrees of corrosion. Or, due to improper operation during construction, the connecting hardware may be damaged, the tension plates may be deformed and bent, etc. In order to ensure that the normal operation of the transmission lines is not affected, the hardware needs to be replaced and rectified.

[0004] During the process of replacing the tension joint plate, a hand hoist and wire rope are used to fix one end on the construction hole of the tower or the construction hole of the LF joint plate, and the other end is anchored by a temporary anchor rope and a wire clamp to form a temporary anchor device, so that the tension joint plate is in a relaxed and unstressed state, and then the tension joint plate is replaced.

[0005] However, since the 750 kV conductor tension string has more connection and length adjustment hardware, and the insulation requires more porcelain insulators, the overall length of the tension string is usually 12-15 meters depending on the dirty area of ​​the line. If one side of the wire rope is fixed to the construction hole of the tower during the replacement of the tension joint plate, the required wire rope length is long, which makes the operation inconvenient and prone to risks. When connected to the construction hole of the tower, the tension string as a whole is not stressed and is in a sagging state. When the tension joint plate is replaced and restored, the tension string needs to be lifted. The 750 kV tension string usually uses porcelain insulators, and the overall weight of the tension string is more than 2 tons, making the work of lifting the tension string difficult.

[0006] If one side of the wire rope is fixed on the LF joint plate construction hole during the replacement of the tension joint plate, the construction risk of the replacement operation can be reduced because the LF joint plate and the tension joint plate are only connected by a right-angle hanging plate and the distance is short. In addition, the hardware and insulators at the tower end of the LF joint plate are still under stress, which can reduce the lifting operation of the tension string compared to the anchoring tower construction hole, thereby improving construction efficiency.

[0007] At present, there is no unified specification or document requirement for the setting of construction holes in hardware joint plates. Hardware manufacturers usually set construction holes based on their own experience or do not consider setting construction holes. The set construction holes may not take into account the construction operation requirements and are set only based on experience, resulting in unreasonable construction hole settings that cannot meet construction requirements.

[0008] Therefore, the development of a 750 kV transmission line tension plate replacement device for LF plates without construction holes or LF plates with unreasonable construction holes has become the key to solving this problem. In view of the special situation in 750 kV high-voltage transmission lines, traditional construction methods often cannot meet the replacement requirements, especially for LF tension plates without reserved construction holes or unreasonable construction hole positions, the replacement operation will face great difficulties and risks.

[0009] Therefore, it is particularly important to develop a tension plate replacement device specifically for 750 kV transmission lines. Patent document CN217079911U (2022-04-02) A double-gauge tower cable installation tool discloses a double-gauge tower cable installation tool, including a fixing part and a U-shaped ring, the fixing parts are two, distributed symmetrically, the upper parts of the two fixing parts are welded together, and the lower parts of the two fixing parts are distributed at an angle of 120°; a U-shaped ring is provided on the top of the fixing part, and a hand hoist is connected to the top of the U-shaped ring. Patent document CN212343174U (2020-04-10) A clamp for replacing a 500kV insulator string discloses a clamp for replacing a 500kV insulator string, and relates to the technical field of insulator string replacement and maintenance tools, comprising a connecting plate with a trapezoidal structure, on which a construction hole is opened, a connecting plate clamp is fixedly arranged in the middle of the connecting plate, and a first double screw is arranged at the bottom of the connecting plate clamp; a wing-shaped clamp is fixedly arranged on the side of the connecting plate; the wing-shaped clamp is a U-shaped structure, on which a wing-shaped clamp fixing hole is opened, and the wing-shaped clamp fixing hole matches and corresponds to the construction hole; bolts are passed through the wing-shaped clamp fixing hole and the construction hole, and the connecting plate and the wing-shaped clamp are fixedly connected to each other by the bolts; the outer end of the wing-shaped clamp is hinged to one end of the second double screw; the bottom end of the first double screw is hinged to one end of the insulator clamp, and the other end of the insulator clamp is hinged to the other end of the second double screw.

[0010] At present, there is no 750 kV transmission line tension plate replacement device specifically for LF plates without construction holes or LF plates with unreasonable construction holes, which can no longer meet existing construction needs. Summary of the invention

[0011] The present invention provides a 750 kV transmission line tension plate replacement device, which overcomes the shortcomings of the above-mentioned prior art and can effectively solve the problem that there is currently no 750 kV transmission line tension plate replacement device specifically for LF plates without construction holes or LF plates with unreasonable construction holes, and that the replacement device can no longer meet existing construction needs.

[0012] The technical solution of the present invention is achieved through the following measures: a 750 kV transmission line tension plate replacement device, comprising an upper plate and a lower plate; pull rods are fixedly installed on the left ends of the upper plate and the lower plate respectively, and the right ends of the upper plate and the lower plate are fixedly installed together through at least two traction plates, a photovoltaic component is fixedly installed on the upper end surface of the left part of the upper plate, an electromagnetic lock body is fixedly installed on the right part of the upper plate, and an electromagnetic lock armature is fixedly installed on the lower plate at the corresponding position, and the photovoltaic component and the electromagnetic lock body are connected together by a wire.

[0013] The following are further optimizations and / or improvements to the above technical solutions: At least two traction plates are symmetrically fixedly installed between the right ends of the upper plate and the lower plate along the front-to-back direction, and a U-shaped hanging ring, a rotary connector, a tension sensor and a steel wire rope are fixedly installed on the traction plates in sequence from left to right.

[0014] The above-mentioned six traction plates are symmetrically fixedly installed between the right ends of the upper plate and the lower plate along the front-to-back direction; the left part of the traction plate is fixedly installed with the upper plate and the lower plate respectively by bolts and nuts, the right part of the traction plate and the left part of the U-shaped hanging ring are fixedly installed together by bolts and nuts, the right part of the U-shaped hanging ring and the left part of the rotary connector are fixedly installed together by bolts and nuts, the right part of the rotary connector and the left part of the tension sensor are connected together, and the right part of the tension sensor is connected to the wire rope.

[0015] The photovoltaic assembly and the tension sensor are connected together through a wire.

[0016] The upper plate is integrally fixed with an upper ear plate at the front left end and the rear left end, respectively, and mounting holes are set on the upper ear plate, and pull rods are fixedly installed on the mounting holes of the two upper ear plates; the lower plate is integrally fixed with a lower ear plate at the front left end and the rear left end, respectively, and mounting holes are set on the lower ear plate, and pull rods are fixedly installed on the mounting holes of the two lower ear plates.

[0017] The pull rod is connected with a metal braided mesh.

[0018] The present invention has a reasonable and compact structure and is easy to use. Through the coordinated use of the upper plate, the lower plate and the traction plate, the replacement of the tension connecting plate can be quickly completed when the LF connecting plate has no construction holes or the construction holes are unreasonable. It has the characteristics of safety, reliability and portability, facilitates operation and improves work efficiency. It also meets the safety standards for high-voltage operations, ensures the safety of workers when working at high altitudes, reduces labor costs and construction risks, and provides reliable guarantee for the stable operation of the transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a schematic diagram of the top structure of the present invention.

[0020] Attached Figure 2 It is a bottom view structural schematic diagram of the present invention.

[0021] Attached Figure 3 It is a schematic diagram of the main structure of the present invention.

[0022] The codes in the accompanying drawings are: 1 is the upper plate, 2 is the lower plate, 3 is the pull rod, 4 is the traction plate, 5 is the photovoltaic component, 6 is the electromagnetic lock body, 7 is the electromagnetic lock armature, 8 is the U-shaped hanging ring, 9 is the rotary connector, 10 is the tension sensor, 11 is the wire rope, 12 is the upper ear plate, 13 is the lower ear plate, and 14 is the metal woven mesh. DETAILED DESCRIPTION

[0023] The present invention is not limited by the following embodiments, and specific implementation methods can be determined based on the technical solution of the present invention and actual conditions.

[0024] In the present invention, for the convenience of description, the relative position relationship of each component is described according to the attached Figure 1 The layout is described in detail, such as the positional relationship of front, back, top, bottom, left, right, etc., which is based on the attached manual. Figure 1 It is determined by the layout direction.

[0025] The present invention will be further described below in conjunction with embodiments and drawings: As attached Figure 1 , 2As shown in Figure 3, the 750 kV transmission line tension joint plate replacement device includes an upper plate 1 and a lower plate 2; a pull rod 3 is fixedly installed on the left ends of the upper plate 1 and the lower plate 2 respectively, and the right ends of the upper plate 1 and the lower plate 2 are fixedly installed together through at least two traction plates 4, a photovoltaic module 5 is fixedly installed on the upper end surface of the left part of the upper plate 1, an electromagnetic lock body 6 is fixedly installed on the right part of the upper plate 1, and an electromagnetic lock armature 7 is fixedly installed on the lower plate 2 at the corresponding position, and the photovoltaic module 5 and the electromagnetic lock body 6 are connected together through a wire. The photovoltaic module 5, the electromagnetic lock body 6 and the electromagnetic lock armature 7 are all known and used in the prior art; the electricity generated by the photovoltaic module 5 provides power support for the electromagnetic lock; when the switch is turned on, that is, when the power is on, the electromagnetic lock body 6 and the electromagnetic lock armature 7 generate suction, which can maintain the stability between the upper plate 1 and the lower plate 2, avoid dislocation and uneven force, and at the same time, the suction can compensate for a certain pulling force. In this way, through the coordinated use of the upper plate 1, the lower plate 2 and the traction plate 4, the replacement of the tension joint plate can be quickly completed when there is no construction hole in the LF joint plate or the construction hole is unreasonable. It is safe, reliable and lightweight, convenient to operate and improves work efficiency. It also meets the safety standards for high-voltage operations, ensures the safety of workers when working at high altitudes, reduces labor costs and construction risks, and provides reliable guarantees for the stable operation of transmission lines.

[0026] According to actual needs, the above-mentioned 750 kV transmission line tension plate replacement device can be further optimized and / or improved: As attached Figure 1 , 2 As shown in Figures 3 and 4, at least two traction plates 4 are symmetrically fixedly installed between the right ends of the upper plate 1 and the lower plate 2 along the front-to-back direction, and a U-shaped hanging ring 8, a rotating connector 9, a tension sensor 10 and a steel wire rope 11 are fixedly installed on the traction plates 4 in sequence from left to right. The U-shaped hanging ring 8, the rotating connector 9 and the tension sensor 10 are all known and commonly used in the prior art; in this way, a more uniform tension is generated.

[0027] As attached Figure 1 , 2 As shown in Figure 3, six traction plates 4 are symmetrically fixedly installed between the right ends of the upper plate 1 and the lower plate 2 along the front-to-back direction; the left part of the traction plate 4 is fixedly installed with the upper plate 1 and the lower plate 2 respectively by bolts and nuts, the right part of the traction plate 4 is fixedly installed with the left part of the U-shaped hanging ring 8 by bolts and nuts, the right part of the U-shaped hanging ring 8 is fixedly installed with the left part of the rotating connector 9 by bolts and nuts, the right part of the rotating connector 9 is connected with the left part of the tension sensor 10, and the right part of the tension sensor 10 is connected with the wire rope 11. In this way, it is convenient to generate more uniform tension and also convenient to install and disassemble.

[0028] As required, the photovoltaic module 5 and the tension sensor 10 are connected together through a wire. The electricity generated by the photovoltaic module 5 provides power support for the tension sensor 10; when the switch is turned on, that is, when the power is on, the tension sensor 10 works so that the staff can pay attention to the tension state in time to avoid accidents such as rope breakage caused by excessive tension.

[0029] As attached Figure 1 , 2 As shown in Figures 3 and 4, upper ear plates 12 are fixedly mounted on the front left end and the rear left end of the upper plate 1, and mounting holes are set on the upper ear plates 12, and tie rods 3 are fixedly mounted on the mounting holes of the two upper ear plates 12; lower ear plates 13 are fixedly mounted on the front left end and the rear left end of the lower plate 2, and mounting holes are set on the lower ear plates 13, and tie rods 3 are fixedly mounted on the mounting holes of the two lower ear plates 13. In this way, the tie rods 3 are convenient to connect with external equipment (such as LF connection board).

[0030] As attached Figure 1 , 2 As shown in FIG. 3 , a metal braided mesh 14 is connected to the pull rod 3. The metal braided mesh 14 is known and commonly used, and can be a double-layer structure; when working, the metal braided mesh 14 can be put on the LF connecting plate and the upper and lower pull rods 3. The use of the metal braided mesh 14 can increase the contact area between the force-bearing components and the LF connecting plate (square connecting plate), and avoid the occurrence of stress concentration damage to the LF connecting plate; the surface of the LF connecting plate can be wrapped with a rubber pad for protection, further reducing the wear of the device on the LF connecting plate and the damage to the zinc layer.

[0031] Advantages of the invention: The 750 kV transmission line tension plate replacement device of the invention is light, efficient and safe, and can quickly replace the tension plate in the absence of construction holes or unreasonable construction holes. At the same time, it also meets the safety standards of high-voltage operations and ensures the safety of workers when working at high altitudes. The device can not only improve the efficiency of replacement operations, but also reduce labor costs and construction risks, providing reliable guarantees for the stable operation of transmission lines.

[0032] The steps of replacing the tension joint plate using the 750 kV transmission line tension joint plate replacement device of the present invention are as follows: (1) Assembling and inspecting the 750 kV transmission line tension plate replacement device of the present invention on the ground, and assembling the traction plate 4, U-shaped hanging ring 8, rotary connector 9, tension sensor 10, and wire rope 11; (2) The ground workers pass the conductor clamp, conductor secondary rope and connecting shackle (U-shaped ring) to the tower workers in turn, and the tower workers cooperate to complete the installation of six sub-conductor secondary ropes. (The sub-conductor is connected to the tower material through the conductor clamp, conductor secondary rope and connecting shackle to form a backup protection for the sub-conductor. Protective measures should be taken for the insulator and tower material before connection); (3) The ground workers sequentially transfer the conductor clamp, the hand hoist, the 750 kV transmission line tension joint plate replacement device of the present invention, and the metal braided mesh 14 to the tower. The tower workers sequentially connect the conductor clamp, the hand hoist, the 750 kV transmission line tension joint plate replacement device, and the metal braided mesh 14. During the process, measures are taken on the two strings of porcelain insulators to ensure that when the hand hoist is tightened, the left and right strings of porcelain insulators remain parallel; (4) The ground workers transfer the new tension joint plate to the tower, and the workers on the tower cooperate to restore the connection between the tension joint plate and the sub-line and the LF joint plate (square joint plate), and confirm that the connection is good; (5) The operators on the tower release the hand-operated hoist synchronously. When the tension joint plate resumes stress, the action is stopped and the stress condition of the tension joint plate is checked again. After confirmation, the hand-operated hoist is released until the joint plate is fully stressed. (6) After the replacement is completed, the workers on the tower will restore the connection between the angle irons of the tension plates. After completion, the hand winch, shackle, conductor clamp, conductor secondary rope and other materials will be removed in turn.

[0033] The above technical features constitute the embodiments of the present invention, which have strong adaptability and implementation effect. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A 750 kV transmission line tension plate replacement device, characterized in that It includes an upper plate and a lower plate; pull rods are fixedly installed on the left ends of the upper plate and the lower plate respectively, and the right ends of the upper plate and the lower plate are fixedly installed together through at least two traction plates, a photovoltaic component is fixedly installed on the upper end surface of the left part of the upper plate, an electromagnetic lock body is fixedly installed on the right part of the upper plate, and an electromagnetic lock armature is fixedly installed on the lower plate at the corresponding position, and the photovoltaic component and the electromagnetic lock body are connected together by a wire.

2. The 750 kV transmission line tension plate replacement device according to claim 1 is characterized in that At least two traction plates are symmetrically fixedly installed between the right ends of the upper plate and the lower plate along the front-to-back direction, and a U-shaped hanging ring, a rotary connector, a tension sensor and a steel wire rope are fixedly installed on the traction plates in sequence from left to right.

3. The 750 kV transmission line tension plate replacement device according to claim 2 is characterized in that Six traction plates are symmetrically fixedly installed between the right ends of the upper plate and the lower plate in the front-to-back direction; the left part of the traction plate is fixedly installed with the upper plate and the lower plate respectively by bolts and nuts, the right part of the traction plate and the left part of the U-shaped hanging ring are fixedly installed together by bolts and nuts, the right part of the U-shaped hanging ring and the left part of the rotary connector are fixedly installed together by bolts and nuts, the right part of the rotary connector and the left part of the tension sensor are connected together, and the right part of the tension sensor is connected to the wire rope.

4. The 750 kV transmission line tension plate replacement device according to claim 3 is characterized in that The photovoltaic module and the tension sensor are connected together through wires.

5. The 750 kV transmission line tension plate replacement device according to claim 1, 2, 3 or 4, characterized in that An upper ear plate is integrally fixed to the front left end and the rear left end of the upper plate, mounting holes are arranged on the upper ear plates, and pull rods are fixedly installed on the mounting holes of the two upper ear plates; a lower ear plate is integrally fixed to the front left end and the rear left end of the lower plate, mounting holes are arranged on the lower ear plate, and pull rods are fixedly installed on the mounting holes of the two lower ear plates.

6. The 750 kV transmission line tension plate replacement device according to claim 1, 2, 3 or 4, characterized in that A metal braided mesh is connected to the pull rod.

7. The 750 kV transmission line tension plate replacement device according to claim 5 is characterized in that A metal braided mesh is connected to the pull rod.

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