CN104201602B - A kind of UHV transmission line bunch of insulator charged for replacement method and gold utensil thereof - Google Patents

Abstract

A live replacement method for an entire string of insulators on an UHV transmission line, using two-three connecting plates and a live replacement fitting, the live replacement fitting includes a fitting body (3), and the connection shape of one side of the fitting body is an isosceles triangle or The first connecting plate (7) of isosceles trapezoidal shape, the other side is connected to the second connecting plate (14), and the fitting body (3) is used to connect the first connecting plate (7) to form a A groove on the hypotenuse of a connecting plate (7), the hardware body (3) is provided with a hook (1) for pulling and fixing the wire and a two-way three-way block. When the entire string is replaced, the wires are tightened until the tension insulator string is loosened, and the tension insulator string is loosened and hangs down to the ground for replacement. According to the invention, the detachment weight of the UHV tension insulator string can be reduced, and the hardware is not easy to slip out, which reduces the difficulty of work and facilitates easy live swapping of the insulator string.

Description

A live replacement method and hardware for a whole string of insulators in UHV transmission lines

technical field

The invention relates to the field of electric power maintenance, in particular to a method for live replacement of a whole string of insulators for UHV transmission lines and fittings thereof. The method can be used in conjunction with two-way and three-way trolleys and hoists when exchanging UHV tension insulator strings, which can reduce the detachment weight of UHV tension insulator strings when they are electrified, and the fittings are not easy to slip out, reducing work Difficulty, it is convenient to easily replace the insulator string with electricity.

Background technique

In the past, extra-high voltage transmission lines, such as 220kV transmission lines, generally used double-split conductors, and the matching insulators also used double-string types. Its live exchange transmission line and its string insulators are important items in live work projects, and it is necessary to tighten the insulator strings to replace insulators while meeting the safety distance.

Usually, in order to replace various fixtures for double-string insulators of transmission lines, various load-bearing tightening tools such as screw rods, pulley blocks, hydraulic tighteners, mechanical tighteners and other tools can be matched with fixtures to tighten the insulator strings. Carry out live unilateral exchange, reduce work difficulty and improve work efficiency. For example, a fixture for 220KV strain insulator replacement, the fixture includes a first fixture and a second fixture, the first fixture and the second fixture are respectively set on the first On the connecting plate and the second connecting plate, the first jig is provided with a first pulley hole and a bottle holder hole, and the second jig is provided with a third pulley, a second pulley hole and a lead screw hole, A first pulley is connected to the first pulley hole, and the second clip is connected to the first clip 1 through a tightening device. When in use, after installing the load-bearing tightening device, use the tightening device to tighten the insulator string, so that after one side of the insulator is loose, the manpower is detached and slowly loosened to the ground. At the same time, the connection of one side of the insulator is kept intact to increase safety. . After the replacement work on one side is completed, install the fixture to the other side for operation.

However, in recent years, the demand for electricity has increased greatly. As an ultra-high voltage 220kV transmission line, it cannot meet the requirements, and 500KV, 800KV or even 1000kV UHV transmission lines have appeared. The 500KV, 800KV or even 1000kV UHV transmission lines use 4-8 split conductors, and the transmission lines use 2-4 strings of insulators respectively, and the weight increases sharply compared with the previous 220kV transmission lines. For example, a 500KV UHV transmission line uses insulators of 2-4 strings, 28-31 pieces/string, and a single weight of 8KG/piece, and an UHV UHV transmission line uses 3-4 strings, 78 pieces/string, and a single weight of 28 -30KG/piece of insulators, the total weight increases sharply. In this way, higher requirements are put forward for the reliability of power supply of UHV transmission lines, live work, and exchange of insulator strings while live.

For example, in the past, when replacing the tension insulator strings of 220kV transmission lines, because of the use of insulators with 2-4 strings, 28-31 pieces/string, and a single weight of 8KG/piece, it is acceptable when replacing the insulator strings with electricity The insulator string is easily loosened by means of a motorized winch, so that it slowly falls off and hangs down to the ground, and resets after repairing or replacing the insulator string.

However, UHV UHV transmission lines use insulators with 3-4 strings, 78 pieces/string, and a single weight of 28-30KG/piece. Because the weight of the UHV tension insulator strings is greater, manpower cannot be loosened. Motorized winch milling is inconvenient and laborious to operate; when exchanging tension insulator strings, two or three connecting plates must be used to connect multiple strings of insulator strings with a total weight of several tons for the second time, and then loosen them. replace. Therefore, higher requirements are placed on the connection of the gussets. In addition, due to the limitations of existing production specifications, usage habits, and manufacturing cost requirements, the existing connecting plates or fixtures used in series for live exchange insulators and used as main connecting components are standardized isosceles triangles or isosceles trapezoids, with oblique As a result, the operation of the tension insulator string is unstable, and it is easy to slip out, resulting in the inability to easily replace the UHV tension insulator string, and even causing safety accidents in severe cases.

Contents of the invention

In order to solve the problems mentioned above, the object of the present invention is to:

Provided is a live replacement method for a whole string of insulators for UHV transmission lines and its fittings, which are used for live replacement when replacing UHV tension insulator strings, and the method can reduce the detachment of UHV tension insulator strings during live replacement Weight, and the hardware is not easy to slip out, which is convenient for easy live one-side replacement of the insulator string.

In order to achieve the above object, the technical scheme of a method for live replacement of UHV string insulators according to the present invention is as follows:

A live replacement method for an entire string of insulators on an UHV transmission line, using two to three connecting plates, characterized in that:

A metal tool for live replacement of tension insulator strings for UHV transmission lines is used, the metal tool for live replacement of tension insulator strings for UHV transmission lines includes a metal tool body 3, and the connection shape of one side of the metal tool body is an isosceles triangle or The first connecting plate 7 of isosceles trapezoidal shape, the cross arm side of the first connecting plate 7 is connected with multiple strings of insulator strings with a total weight of several tons, and the other side is connected with multiple split wires,

The other side of the fitting body is connected to the second connecting plate 14, and the tension borne by the second connecting plate 14 is transmitted to the first connecting plate 7. The second connecting plate 14 is used for parallel and uniform connection of multi-split wires,

The fitting body 3 is used to connect the first connecting plate 7 to form a groove for embedding and fixing the hypotenuse of the first connecting plate 7, the shape of the groove closely matches the hypotenuse of the first connecting plate,

The hardware body 3 is provided with a hook 1 for pulling and fixing the wire and a two-way and three-way pulley,

When replacing the entire series of UHV tension insulator strings, the fitting body 3 is connected to the first connecting plate 7 and the second connecting plate 14, and the hook 1 set on the fitting body 3 and the second and third pulleys and setting Driven by the motorized winch on the ground, the wires are tightened until the tension insulator strings are loosened, and the steel cables are connected and fixed to the second connecting plate 14 and the cross arm,

After the tension insulator string is loose, it slowly droops to the ground for replacement.

After replacement, the tension insulator string is driven back to its original position by driving two and three pulleys and the ground-mounted motorized winch, and the next string of tension insulator strings is replaced.

According to the live replacement method for the whole series of insulators of UHV transmission lines according to the present invention, it is characterized in that: a parallel hanging plate 9 for connection is arranged between the first connecting plate 7 and the second connecting plate 14, and the fitting body 3 is arranged at the parallel hanging plate 9, and the hardware body 3 is provided with a fixing piece for fixing the parallel hanging plate 9.

According to a live replacement method for a whole string of insulators on an UHV transmission line according to the present invention, one side of the hardware body 3 is connected with a parallel hanging plate 9 through a bolt 5 and a backing plate 6 .

According to the live replacement method for a whole string of insulators on an UHV transmission line according to the present invention, it is characterized in that: the second connecting plate 14 is rectangular or parallelogram.

According to a live replacement method for a whole string of insulators on a UHV transmission line according to the present invention, it is characterized in that the hook 1 used for the traction of two and three pulleys is a moving rod type double hook with a moving rod in the middle and hooks at both ends. The head hook, the moving rod can move through the fitting body 3, and the two ends of the hook can be moved through to expose the two ends of the fitting body 3, so that the fitting body 3 can be installed on the first connecting plate and close to the second connecting plate either hypotenuse side of .

According to the live replacement method for a whole string of insulators on an UHV transmission line according to the present invention, it is characterized in that: the first connecting plate is connected to the tension insulator string on the side of the cross arm through an extension tie rod and a bowl hanging plate.

According to the live replacement method for a whole string of insulators on UHV transmission lines according to the present invention, it is characterized in that: one piece of the second connection plate is provided, two pieces of the first connection plate are provided, and 2-4 pieces of the fitting body 3 are provided. indivual.

The technical scheme of the whole string of insulator strings for live replacement of UHV transmission lines provided by the present invention is as follows:

A fitting for live replacement of a whole string of insulator strings for UHV transmission lines, including a fitting body 3,

It is characterized in that: one side of the fitting body is connected to a first connection plate 7 whose shape is isosceles triangle or isosceles trapezoid, and the cross arm side of the first connection plate 7 is connected to multiple strings of insulator strings with a total weight of several tons. The other side is connected to the multi-split wire,

The other side of the fitting body is connected to the second connecting plate 14, and the tension borne by the second connecting plate 14 is transmitted to the first connecting plate 7. The second connecting plate 14 is used for parallel and uniform connection of multi-split wires,

The fitting body 3 is used to connect the first connecting plate 7 to form a groove for embedding and fixing the hypotenuse of the first connecting plate 7, the shape of the groove closely matches the hypotenuse of the first connecting plate,

The hardware body 3 is provided with a hook 1 for pulling and fixing the wire and a two-way and three-way block.

The two-way and three-way blocks are driven by a motorized winch.

According to the present invention, a metal fitting for live replacement of a whole string of insulator strings for an UHV transmission line is characterized in that a parallel hanging plate 9 for connection is provided between the first connecting plate 7 and the second connecting plate 14 .

According to the present invention, a metal fitting for live replacement of a whole string of insulator strings for UHV transmission lines is characterized in that: the fitting body 3 is set at the parallel hanging plate 9, and the fitting body 3 is provided with a The fixture of parallel hanging plate 9.

According to the present invention, a metal fitting for live replacement of a whole string of insulator strings for an UHV transmission line, one side of the hardware body 3 is connected with a parallel hanging plate 9 through a bolt 5 and a backing plate 6 .

According to the metal fitting for live replacement of a whole string of insulator strings for an UHV transmission line according to the present invention, the second connecting plate 14 is rectangular or parallelogram-shaped.

According to the present invention, a metal fitting for live replacement of a whole string of insulator strings for an UHV transmission line is characterized in that: the hook 1 used for traction by two and three pulleys is a moving rod with a moving rod in the middle and hooks at both ends type double-headed hook, the moving rod can move through the fitting body 3, and the two ends of the hook can be moved through to expose the two ends of the fitting body 3, thus, the fitting body 3 can be installed on the first connecting plate near the second Either hypotenuse side of the gusset.

According to the metal fitting for live replacement of the entire string of insulator strings for UHV transmission lines according to the present invention, the first connecting plate is connected to the tension insulator string on the side of the cross arm through an extension tie rod and a bowl hanging plate.

According to the present invention, a metal fitting for live replacement of a whole string of insulator strings for an UHV transmission line is characterized in that: one piece of the second connecting plate is provided, two pieces of the first connecting plate are provided, and two pieces of the fitting body 3 are provided. -4.

According to the present invention, when the whole series of UHV insulator strings are charged and exchanged, it can cooperate with the two-way and three-way trolley and the hoist, which can reduce the detachment weight of the UHV whole series of insulator strings when they are charged, and the fittings are not easy to slip out, reducing the Difficulty of work, it is convenient to carry out easy live unilateral replacement of the whole series of UHV insulator strings, and improve work efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of a metal fitting for live replacement of a whole string of insulators of an UHV transmission line according to the present invention.

Fig. 2 is a top view of a metal fitting for live replacement of a whole string of insulator strings of an UHV transmission line in Fig. 1 according to the present invention.

Fig. 3 is a three-dimensional schematic diagram of a fitting body.

Fig. 4 is a schematic diagram of the method for live replacement of the entire string of insulator strings of UHV transmission lines and the use of fittings thereof according to the present invention.

In the figure, 1 is the hook, 2 is the square head set screw, 3 is the hardware body, 4 is the nut, 5 is the bolt, 6 is the backing plate, 7 is the first connecting plate, 8 is the insulator string parallel hanging plate, 9 is parallel Hanging plate, 10 is to walk two and three tackles, and 14 is the second connecting plate.

detailed description

The method for live replacement of tension insulator strings for UHV transmission lines of the present invention and its fittings will be further described below in conjunction with the accompanying drawings.

A metal tool for live replacement of tension insulator strings for UHV transmission lines, the metal tool for detaching tension insulator strings includes a first connecting plate 7 in the shape of an isosceles triangle or an isosceles trapezoid, and the first connecting plate 7 is transversely The side of the load is connected with multiple strings of insulator strings with a total weight of several tons, and the second connecting plate 14 on the other side is used to connect six split conductors in parallel and uniformly. The second connecting plate is provided with one piece. is a rectangle. There are two first connecting plates. The first connecting plate 7 is an isosceles trapezoid or an isosceles triangle, and is connected to the second connecting plate 14 with a hypotenuse side.

The cross arm is an angle iron fixed horizontally on the top of the utility pole, and there is a porcelain vase on it, which is used to support the overhead wire. The function of the cross arm: The cross arm is an important part of the tower. Its function is to install insulators and fittings to support wires and lightning conductors, and to keep them at a certain safe distance according to regulations.

The fitting body 3 is provided for connecting the first connecting plate 7 and the second connecting plate 14 , and transferring the tension borne by the second connecting plate 14 to the first connecting plate 7 . The fitting body 3 is used to connect the first connecting plate 7 to form a groove for inserting and fixing the hypotenuse of the first connecting plate 7, the shape of the groove closely matches the hypotenuse, and the fitting body 3 is provided with There is a hook 1 and a two-way three-tackle block that are used for walking two-way three-tackle traction. The two-way and three-way tackle is driven by a ground motorized winch.

In addition, a parallel hanging plate 9 for connection is arranged between the first connecting plate 7 and the second connecting plate 14 . The fitting body 3 is arranged at the parallel hanging plate 9 , and the fitting body 3 is provided with a fixing member for fixing the parallel hanging plate 9 . One side of the hardware body 3 is connected with a parallel hanging plate 9 through a bolt 5 and a backing plate 6 .

The second connecting plate 14 is evenly connected with six split wires in parallel. The fitting body 3 is used for connecting the first connecting plate 7 to form a groove for inserting and fixing the hypotenuse of the first connecting plate 7 , and the shape of the groove closely matches the hypotenuse. The hook 1 used for the traction of two and three pulleys is a moving rod type double-headed hook with a moving rod in the middle and hooks at both ends. The moving rod can movably penetrate the fitting body 3, and the two ends of the hook can The two ends of the fitting body 3 are exposed through, so that the fitting body 3 can be installed on any hypotenuse side of the first connecting plate close to the second connecting plate.

When replacing and detaching the UHV tension insulator string, the fitting body 3 is connected to the first connecting plate 7 and the second connecting plate 14, through the hook 1 set on the fitting body 3 and the second and third pulleys and the ground Driven by a motorized winch, the wires are tightened until the tension insulator string is loose, and the steel cable is connected and fixed to the second connecting plate 14 and the cross arm, and the tension insulator string is slowly drooped to the ground after being loose. replace,

After replacement, the tension insulator string is driven back to its original position by driving two and three pulleys and the ground-mounted motorized winch, and the next string of tension insulator strings is replaced.

According to the present invention, when exchanging UHV tension insulator strings with electricity, it can cooperate with two-way and three-way trolleys and winches, which can reduce the detachment weight of UHV tension insulator strings during live replacement, and the fittings are not easy to slip It reduces the difficulty of work, facilitates the easy live unilateral exchange of insulator strings, and improves work efficiency.

Claims (8)

1. a UHV transmission line bunch of insulator charged for replacement method, uses two to three pieces of gusset pieces, its feature It is:

Use a kind of strain insulator string for super-high voltage transmitting line charged for replacement gold utensil, described extra-high voltage transmission line Road strain insulator string charged for replacement gold utensil includes gold utensil body (3), and described gold utensil body side connects shape For first gusset piece (7) of isosceles triangle or isosceles trapezoid, described first gusset piece (7) cross-arm side connect many strings, Always weigh the insulator chain of several tons, and opposite side connects multiple fission conductor,

Described gold utensil body opposite side connects the second gusset piece (14), and the tension force born by the second gusset piece (14) passes Be handed to the first gusset piece (7), described second gusset piece (14) for parallel, uniformly connect multiple fission conductor,

Described gold utensil body (3) is formed for embedding fixing described first for connecting the first gusset piece (7) place The groove of gusset piece (7) hypotenuse, described groove shapes and the first gusset piece hypotenuse tight connecting,

It is provided with the hook (1) for drawing fixing wire on described gold utensil body (3) and walks two and walk three coasters,

When extra-high voltage strain insulator string being carried out whole string and changing, gold utensil body (3) is connected the first gusset piece (7) With the second gusset piece (14), by the upper hook (1) arranged of described gold utensil body (3) and walk two walk three coasters and The motor-driven grinding mill being arranged at ground drives, and after stringing lead to described strain insulator string gets loose, cable wire connects fixing Described second gusset piece (14) and cross-arm,

Described strain insulator string slowly hangs down to ground after getting loose and is replaced,

Described strain insulator string after replacing by walk two walk three coasters and be arranged at ground motor-driven grinding mill drive Restore in situ, a string changing strain insulator string under carrying out.

2. a kind of UHV transmission line bunch of insulator charged for replacement method, its feature exists In:

It is provided with the parallel link plate of connection insulator chain between described first gusset piece (7) and the second gusset piece (14) (9), described gold utensil body (3) is arranged at described insulator chain parallel link plate (9) place, described gold utensil body (3) It is provided with the fixture for fixing the parallel link plate of described insulator chain (9).

3. a kind of UHV transmission line bunch of insulator charged for replacement method, described gold utensil is originally Bolt, the parallel link plate of backing plate connecting insulator string (9) are passed through in body (3) side.

4. a kind of UHV transmission line bunch of insulator charged for replacement method, its feature exists In:

Described second gusset piece (14) is rectangle or parallelogram.

5. a kind of UHV transmission line bunch of insulator charged for replacement method, its feature exists In,

Described for walk two hooks (1) walking three coasters tractions be middle part be the movement that mobile bar, two ends have hook Rod-type double-head hanger, described mobile bar runs through gold utensil body (3) movably, and two end hooks can run through by mobile Exposing gold utensil body (3) two end, thus, described gold utensil body (3) is mountable to the first gusset piece nearly second Arbitrary hypotenuse side of fishplate bar.

6. a kind of UHV transmission line bunch of insulator charged for replacement method, its feature exists In:

Described first gusset piece is connected to the strain insulator string of cross-arm side by extending pull rod and socket-clevis eye.

7. a kind of UHV transmission line bunch of insulator charged for replacement method, its feature exists In:

Described second gusset piece arranges one piece, and described first gusset piece arranges two pieces, and described gold utensil body (3) is arranged 2-4.

8. a UHV transmission line bunch of insulator ribbon charged renewal gold utensil, including gold utensil body (3),

It is characterized in that: described gold utensil body side connects the first connection being shaped as isosceles triangle or isosceles trapezoid Plate (7), described first gusset piece (7) cross-arm side connects many strings, always weighs the insulator chain of several tons, and opposite side is even Connect multiple fission conductor,

Described gold utensil body opposite side connects the second gusset piece (14), and the tension force born by the second gusset piece (14) passes Be handed to the first gusset piece (7), described second gusset piece (14) for parallel, uniformly connect multiple fission conductor,

Described gold utensil body (3) is formed for embedding fixing described first for connecting the first gusset piece (7) place The groove of gusset piece (7) hypotenuse, described groove shapes and the first gusset piece hypotenuse tight connecting,

It is provided with the hook (1) for drawing fixing wire on described gold utensil body (3) and walks two and walk three coasters.