CN103825222A - Tool for changing 220kV narrow base tower strain insulator string with charges - Google Patents

Abstract

A tool for live replacement of 220kV narrow-base tower tension insulator strings, which is composed of triangular connecting plate clamps for connecting delta connecting plates, insulating pull rods, hydraulic screw and right-angle connecting plate clamps for connecting right-angle connecting plates. Disassemble the connection structure, the insulating pull rod is connected between the triangular joint clamp and the right-angle joint clamp by a hydraulic screw, and the triangle joint clamp is used to connect one end of the triangular joint and the right-angle joint One end of the jig used to connect the right-angled joints forms a double-splint structure. The double-splints of the triangular jointed jig can clamp the triangular joints between them and fix them, and the double-splined plates of the right-angled jointed jig can clamp the right-angled joints. fixed in between. The invention is simple in structure, easy to install and operate, can reduce the difficulty of maintenance work, improve efficiency, and has more reliable connection, high strength and good balance, can reduce potential safety hazards, effectively meet the safety requirements in the process of liveline operation of narrow base towers, and realize Safe live maintenance greatly improves the safety and reliability of power grid operation.

Description

A tool for live replacement of 220kV narrow base tower tension insulator strings

technical field

The invention relates to the technical field of live operation of power grids and transmission lines, in particular to a tool for live replacement of 220kV narrow base tower tension insulator strings. the

Background technique

With the development of society and economy, the society's demand for electric power is increasing, which promotes the continuous expansion of the grid scale. As the current main mode of power transmission, overhead line transmission is also increasing the scale of the line. With the acceleration of urbanization, the land resources are becoming more and more tense. The commonly used typical angle steel towers occupy a wide line channel and the towers are large, which cannot adapt to the current situation of land resources shortage in economically developed areas. However, if steel pipe poles are used, although it can meet the requirements of reducing the occupied area, the steel pipe pole lines have higher requirements than iron towers, and the processing and transportation are difficult. Large-scale mechanical equipment is required for assembly, which has high requirements for the construction site environment and high project cost. , is not conducive to operation and maintenance. the

On this basis, narrow base towers, such as narrow base steel pipe towers, came into being. Compared with conventional angle steel and steel pipe towers, narrow-base steel pipe towers have the advantages of small footprint, compact and stable overall tower shape, compact tower arm span, and less space occupied by lines. Therefore, new line infrastructure projects have become more and more popular in recent years. The more inclined to use this type of tower. the

With the continuous improvement of society's dependence on electricity, it has great requirements for power quality and continuous power supply. Once a power outage will cause huge economic losses and social effects, therefore, non-stop maintenance has become the most important thing for power grid maintenance. conventional means. However, due to the compact body and short arm span of the narrow-base steel pipe tower, the working clearance required by the conventional live-line working method cannot be met; it can be said that the non-stop maintenance of the narrow-base tower is almost a blank field. the

At present, the use of new narrow base towers is accompanied by a new type of insulation configuration, that is, double insulators, one end of which is a triangular joint plate, and the other end is a right-angle joint plate. use. The existing devices for live replacement of tension insulator strings generally require at least two sets of devices to be installed between the same group of connecting plates, the structure is complex, the assembly and disassembly is cumbersome, and the connecting structure is connected to the connecting plates by screws, so the strength is relatively low, and it is easy to cause damage. The loosening of the screws leads to potential safety hazards, low safety reliability, and for some narrow base towers, the safety requirements during the operation cannot be met. the

Contents of the invention

The main purpose of the present invention is to overcome the shortcomings of the prior art, to provide a simple structure that can be disassembled and transported, easy to install and operate, can reduce the difficulty of maintenance work, improve efficiency, high strength, high safety and reliability, and can effectively meet Tools for live replacement of 220kV narrow base tower tension insulator strings for safety requirements in the process of live work on narrow base towers. the

The present invention adopts following technical scheme:

A tool for live replacement of 220kV narrow-base tower tension insulator strings, which is composed of triangular connecting plate clamps for connecting delta connecting plates, insulating pull rods, hydraulic screw and right-angle connecting plate clamps for connecting right-angle connecting plates. Disassemble the connection structure, the insulating pull rod is connected between the triangular joint clamp and the right-angle joint clamp by a hydraulic screw, and the triangle joint clamp is used to connect one end of the triangular joint and the right-angle joint One end of the jig used to connect the right-angled joints forms a double-splint structure. The double-splints of the triangular jointed jig can clamp the triangular joints in between and fix them, and the double splints of the right-angled jointed jig can clamp the right-angled joints. fixed in between. the

Further, the triangular plate clamp, hydraulic screw, insulating pull rod and right-angle plate clamp are sequentially detachably connected by fasteners. the

Further, one end of the triangular joint clamp connected to the triangular joint is formed with a first upper splint and a first lower splint, the triangular joint can be sandwiched therebetween, and the first upper splint and the first lower splint respectively correspond to There are two pin holes matched with the fixed holes on the triangular joint plate, and the triangular joint plate fixture can be locked on the triangular joint plate by two movable bolts. the

Further, one end of the right-angle connecting plate connected to the right-angle connecting plate is formed with a second upper splint and a second lower splint, and the right-angle connecting plate can be sandwiched therebetween, and the ends of the second upper splint and the second lower splint respectively correspond to Two pin holes are provided, and the right-angle connecting plate fixture can be locked on the right-angle connecting plate through two movable bolts. the

Further, an adjustment block is also clamped between the right-angle joint plate and the end of the right-angle joint clamp, and the adjustment stop is formed with a slot, which can be clamped on the movable latch installed at the end of the right-angle joint clamp superior. the

Further, the triangular joint plate fixture is fixed at the middle position of the triangular joint plate, and the right-angle joint plate clamp is fixed at the middle position of the right-angle joint plate. the

From the above description of the present invention, it can be seen that compared with the prior art, the beneficial effect of the present invention is that the triangular joint clamp and the right-angle joint clamp are connected to the middle positions of the triangular joint and the right-angle joint respectively, and only one The live replacement of the insulator strings on both sides can be completed with a set of tools. The structure is simple, easy to install and operate, which can reduce the work difficulty of the maintenance staff, shorten the working time, improve efficiency, and can be disassembled and transported. At the same time, the triangular plate Fixtures and right-angle joints The fixture adopts a double-splint structure, which is locked and connected with the triangle joint and the right-angle joint through the movable bolt. The connection is more reliable, the strength is high, and the balance is good, which can avoid slipping, shaking, and loosening. It can reduce potential safety hazards and effectively meet the safety requirements in the process of live-line work on narrow base towers. Therefore, it is possible to realize safe on-line inspection and maintenance, reduce the amount of outage and power transmission operations and change the operation mode of the entire power grid, which can not only achieve huge economic benefits, but also greatly improve the safety and reliability of power grid operation. the

Description of drawings

Fig. 1 is the installation structure schematic diagram of the specific embodiment of the present invention;

Fig. 2 is the sectional view of the connecting structure of the triangular joint plate and the triangular joint plate fixture of the specific embodiment of the present invention;

Fig. 3 is a cross-sectional view of the connection structure of the right-angle connecting plate and the right-angle connecting plate fixture according to the specific embodiment of the present invention. the

In the figure: 1. Triangular connecting plate, 2. Triangular connecting plate fixture, 20. The first upper splint, 21. The first lower splint, 3. Hydraulic screw, 4. Insulated pull rod, 5. Right-angle connecting plate, 6 .Right-angle joint clamp, 60. The second upper splint, 61. The second lower splint, 7. Movable bolt, 8. Adjusting stopper, 80. Card slot. the

Detailed ways

The present invention will be further described below through specific embodiments. the

With reference to Fig. 1, Fig. 2 and Fig. 3, a kind of tool of the present invention is used for live replacement of 220kV narrow-base tower tension insulator strings, which is composed of triangular connecting plate fixture 2 for connecting delta connecting plate 1, hydraulic screw 3, insulator The pull rod 4 and the right-angle connecting plate fixture 6 for connecting the right-angle connecting plate 5 are sequentially and detachably connected by fasteners. the

One end of the triangular joint fixture 2 for connecting the triangular joint plate 1 and one end of the right-angle joint plate fixture 6 for connecting the right-angle joint plate 5 form a double splint structure, and the double splints of the triangular joint fixture 2 can be The triangular joint plate 1 is clamped and fixed therebetween, and the double clamps of the right-angle joint plate fixture 6 can clamp the right-angle joint plate 5 therebetween and fix it. The triangular joint fixture 2 is fixed at the middle position of the triangular joint plate 1 , and the right-angle joint plate fixture 6 is fixed at the middle position of the right-angle joint plate 5 . the

One end of the triangular joint clamp 2 connected to the triangular joint 1 is formed with a first upper splint 20 and a first lower splint 21, the triangular joint 1 can be sandwiched therebetween, the first upper splint 20 and the first lower splint Correspondingly on 21, there are two pin holes matched with the fixing holes on the triangular connecting plate 1 respectively, and the triangular connecting plate fixture 2 can be locked on the triangular connecting plate 1 by two movable bolts 7 . the

One end of the right-angle connecting plate 6 connected to the right-angle connecting plate 5 is formed with a second upper splint 60 and a second lower splint 61, and the right-angle connecting plate 5 can be sandwiched therebetween. The second upper splint 60 and the second lower splint The ends of 61 are correspondingly provided with two pin holes respectively, and the right-angle connecting plate fixture 6 can be locked on the right-angle connecting plate 5 by two movable bolts 7 . An adjustment block 8 is also clamped between the right-angle connecting plate 5 and the end of the right-angle connecting plate fixture 6, and the adjusting stop 8 is formed with a slot 80, which can be clamped at the end of the right-angle connecting plate fixture 6 The active latch 7 is on. the

Referring to Fig. 1, Fig. 2 and Fig. 3, the present invention includes the following steps when performing live replacement of 220kV insulator strings by ground potential method:

① Connect the triangular joint plate fixture 2, hydraulic screw 3, insulating pull rod 4 and right-angle joint plate fixture 6 in sequence;

② Lock the triangular joint fixture 2 at the middle position of the triangular joint plate 1, and lock the right-angle joint fixture 6 at the middle position of the right-angle joint plate 5;

③ Tighten the hydraulic screw 3 and loosen the insulator string;

④ Replace the string of insulators and restore the hydraulic screw 3, remove the tool of the present invention, that is, complete the operation of replacing the string of tension insulators of the 220kV narrow base tower with electricity. the

The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial changes made to the present invention by using this concept should be an act of violating the protection scope of the present invention. the

Claims (6)

1. A tool for live replacement of 220kV narrow-base tower tension insulator strings, characterized in that: it consists of a delta-connection clamp for connecting delta-connection plates, an insulating pull rod, a hydraulic screw and a tool for connecting right-angle connection plates The right-angle joint clamp is detachably connected. The insulating pull rod is connected between the triangle joint clamp and the right-angle joint clamp by a hydraulic screw. The triangle joint clamp is used to connect the triangle joint. One end of the right-angle connecting plate fixture and one end of the right-angle connecting plate are used to form a double splint structure. Place the right-angle bracket clips in between to secure. the 2. A tool for live replacement of 220kV narrow-base tower tension insulator strings as claimed in claim 1, characterized in that: the triangular joint plate clamp, hydraulic screw, insulating pull rod and right-angle joint plate clamp pass through Fasteners are in turn releasably connected. the 3. A tool for live replacement of 220kV narrow base tower tension insulator strings as claimed in claim 2, characterized in that: the delta clamp is connected to one end of the triangular plate to form a first upper splint and a first The lower splint can sandwich the triangular link between them. The first upper splint and the first lower splint are respectively provided with two pin holes matching the fixing holes on the triangular link. The fixture is locked on the triangular joint plate. the 4. A tool for live replacement of 220kV narrow-base tower tension insulator strings as claimed in claim 2, characterized in that: said right-angle connecting plate fixture is connected to one end of the right-angle connecting plate to form a second upper splint and a second The lower splint can sandwich the right-angle connecting plate therebetween, and the ends of the second upper splint and the second lower splint are respectively provided with two pin holes, and the right-angle connecting plate fixture can be locked on the right-angle connecting plate through two movable bolts. the 5. A tool for live replacement of 220kV narrow-base tower tension insulator strings as claimed in claim 4, characterized in that: an adjustment block is clamped between the right-angle connecting plate and the end of the right-angle connecting plate fixture, The adjustment block is formed with a slot, which can be clamped on the movable pin installed at the end of the right-angle joint clamp. the 6. A tool for live replacement of 220kV narrow base tower tension insulator strings as claimed in claim 3 or 4, characterized in that: the triangular connecting plate clamp is fixed at the middle position of the delta connecting plate, and the right angle connecting plate clamping tool Fixed in the middle of the right-angle connecting plate. the

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