CN110635388A - An eight-split large cross-section wire tension stringing pulley hanger and its disassembly method - Google Patents

Abstract

The invention relates to an eight-split large cross-section wire tension stringing pulley hanger and a disassembly method thereof. The pulley hanger is an isosceles trapezoidal multi-layer frame structure, and both ends of the isosceles trapezoidal upper bottom are provided with V-shaped The hanging board B connected in series by insulators, four hanging boards A are evenly installed along the length direction on the lower bottom of the isosceles trapezoid, two of which are installed on the two ends of the lower bottom of the isosceles trapezoid, and each hanging board A Both of them are connected to the pay-off block through parallel hanging plates, and the four pay-off blocks are suspended on the block hanger at the same height. The present invention simplifies the layout and suspension mode of the four sets of three-wheel pay-off blocks on each pole of the iron tower, and improves the construction efficiency of the pulley suspension for tension stringing; at the same time, it well solves the problem of block suspension caused by the conventional block suspension mode in the stringing construction Difficult to adjust the height and contour, difficult to observe the sag, poor installation efficiency of accessories and other key problems; avoid the problem that a project is basically scrapped after hanging a project with a single wire rope sleeve, can be reused, and reduce construction costs; compared with conventional suspension blocks, the number of suspension points is reduced, Reduce security risks.

Description

An eight-split large cross-section wire tension stringing pulley hanger and its disassembly method

technical field

The invention belongs to the field of power transmission and transformation construction, and in particular relates to an eight-split large cross-section wire tension stringing trolley hanger and a disassembly method thereof.

Background technique

UHV is the most advanced power transmission technology in the world, with the characteristics of large transmission capacity, long transmission distance, low line loss, and less land occupation.

Some projects of UHV DC transmission lines use eight-split 1250/100mm Class ² large-section conductors, which are the first application in China’s UHV DC transmission line projects. The outer diameter and calculated weight of the wires are large, and the performance requirements for construction machines and tools are high for tension release. . The tension stringing adopts the "4×one lead two" method, so that each pole of each iron tower needs to hang four sets of pay-off tackles with a diameter of 1160mm, and one iron tower needs to hang eight sets of pay-off tackles. Conventional method single group tackle usually uses two (about 5 meters/root) fixed-length steel wire ropes, cooperates winch mill, hand block to carry out suspension. There are following deficiencies in this suspension:

First, the safety is low, there are too many suspension points, and there are safety hazards at each point.

The second, construction efficiency is low, and tackle is suspended one by one.

Third, the sag control is difficult, the height of the block is difficult to be adjusted consistently, and it is difficult to adjust the sag of each sub-conductor.

Fourth, the construction cost is high, and the seven or eight hundred fixed-length steel wire ropes produced by one project are basically scrapped after use and are difficult to reuse.

Contents of the invention

In order to solve the above-mentioned problems of independently suspending four groups of tackles, the object of the present invention is to provide an eight-split large-section wire tension stringing trolley hanger and a dismounting method thereof.

The purpose of the present invention is achieved through the following technical solutions:

The eight-split large cross-section wire tension stringing pulley hanger of the present invention is a multi-layer frame structure of isosceles trapezoid, and both ends of the upper bottom of the isosceles trapezoid are provided with hanging plates B for connecting with V-shaped insulators in series. The lower bottom of the isosceles trapezoid is evenly equipped with four hanging boards A along the length direction, two of which are installed on the two ends of the lower bottom of the isosceles trapezoid, and each of the hanging boards A is passed through parallel The hanging plate is connected to the pay-off tackle, and the four pay-off tackles are suspended at the same height on the tackle hanger;

Wherein: the tackle hanger is divided into an isosceles trapezoidal frame and an inner frame positioned within the frame, and the inside of the frame is divided into upper and lower layers by the horizontal inner frame;

The two ends of the frame as the upper bottom of the isosceles trapezoid are respectively connected to the hanging board B, and the frame as the lower bottom of the isosceles trapezoid is evenly connected with four hanging boards A along the length direction, and the junction of two hanging boards B is connected The connection between the two hanging boards A in the middle of the lower bottom is cross-connected through the inner frame, that is, the two inner frames used for connection are in the shape of "X", and the intersection point is in the middle of the horizontal inner frame. The points are connected by a connecting plate; the connection between the two hanging plates A in the middle of the isosceles trapezoidal lower bottom is respectively connected to the two ends of the horizontal inner frame through the inner frame through the connecting plate;

The frame is channel steel, and the inner frame is angle steel;

The horizontal inner frame is parallel to the upper and lower bases of the isosceles trapezoid;

The dismounting method of the eight-split large cross-section wire tension stringing pulley hanger of the present invention is as follows:

During installation, the upper connecting plates of the four groups of pay-off tackles are respectively connected with the four hangers A on the lower bottom of the isosceles trapezoid through parallel hangers, and the four sets of pay-off tackles are suspended at the same height on the tackle hanger; Then, connect one end of the two sets of V-shaped insulator strings to the hanging boards B at both ends of the upper bottom of the isosceles trapezoid; use two sets of motorized twisted steel wire ropes to connect the other end of the V-shaped insulator strings, and the steel wire ropes pass through the hoisting block on the iron tower by the winch. Lift to the set position by traction, and complete the suspension of four sets of pay-off blocks after connecting with the iron tower;

When disassembling, first use the wire lifter to lift the wires, use the motorized winch for traction control, untie the pay-off tackles from the tackle hangers one by one and drop them to the ground, then use flexible nylon slings and lever blocks to string the V-shaped insulators Fix it and adjust it to the desired position, use the motorized winch to control the connection between the pulley hanger and the V-shaped insulator string, and then put down the pulley hanger; finally, complete the clamping plate and wire with the cooperation of the lever hoist. Installation of clamps and fixing of wires;

Wherein: during the process of laying out the wires, the four sets of pay-off tackles are of the same height and are evenly stressed.

Advantage of the present invention and positive effect are:

1. The pulley hanger of the present invention hangs four groups of pay-off tackles on the same hanger at the same time, without adjusting the height of the tackles, the height remains consistent, and it is easy to adjust the sag of each sub-conductor.

2. The pulley hanger of the present invention can be reused, avoiding the use of wire rope sleeves and then scrapping after one project, reducing construction costs.

3. In the process of setting out the wire, the pulley swings less, the wire passing performance is good, and the safety is improved.

4. The V-type insulator string and the pay-off block are installed and suspended synchronously, which reduces the workload and suspension points, and improves the construction efficiency and safety.

5. The present invention can directly lift the thread after tightening the thread, greatly reducing the workload and reducing the damage of the wire.

Description of drawings

Fig. 1 is the structural front view of tackle hanger of the present invention;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the structural representation that the tackle hanger of the present invention is installed on the iron tower;

Among them: 1 is the frame, 2 is the inner frame, 3 is the connecting plate, 4 is the hanging plate A, 5 is the hanging plate B, 6 is the parallel hanging plate, 7 is the upper connecting plate, 8 is the pay-off block, 9 is V-shaped Insulator string, 10 is an iron tower.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, the tackle hanger of the present invention is an isosceles trapezoidal multi-layer frame structure, and the tackle hanger is divided into an isosceles trapezoidal frame 1 and an inner supporting frame located in the frame 1. Frame 2, the inside of the frame 1 is divided into upper and lower layers by a horizontal inner frame 2, and the horizontal inner frame 2 is parallel to the upper and lower bottoms of the isosceles trapezoid.

Both ends of the upper bottom of the isosceles trapezoid are equipped with hanging plates B5 for connecting with the V-shaped insulator string 9, and four hanging plates A4 are evenly installed on the lower bottom of the isosceles trapezoid along the length direction, two of which are A4 is installed at the two ends of the lower bottom of the isosceles trapezoid, and each hanging plate A4 is connected with a pay-off tackle 8 (the pay-off tackle 8 of the present invention is a three-wheel tackle) through a parallel hanger plate 6, four pay-off tackle 8, etc. High hanging on the pulley hanger. The two ends of the frame 1 as the upper bottom of the isosceles trapezoid are respectively welded with the hanging board B5, and the frame 1 as the lower bottom of the isosceles trapezoid is evenly welded with four hanging boards A4 along the length direction, and the welding points of the two hanging boards B5 and the lower The bottom is in the middle of the welding of the two hanging plates A4, and the inner frame 2 is cross welded between the welding points, that is, the two inner frames 2 used for connection are in the shape of "X", and the intersection point and the midpoint of the horizontal inner frame 2 Solder through connecting plate 3. The welding places of the two hanging plates A4 with the bottom of the isosceles trapezoid in the middle are respectively welded by the inner frame 2 and the two ends of the horizontally placed inner frame 2 by the connecting plate 3 . The frame 1 of the present invention is a channel steel, and the inner frame 2 is an angle steel.

The dismounting method of the eight-split large cross-section wire tension stringing pulley hanger of the present invention is as follows:

During installation, the upper connecting plates 7 of the four sets of pay-off tackles 8 are respectively connected to the four hangers A4 on the lower bottom of the isosceles trapezoid through the parallel hanging plates 6, and the four sets of pay-off tackles 8 are suspended at the same height on the tackle hanger Then, connect one end of the two sets of V-shaped insulator strings 9 with the hanging boards B5 at both ends of the upper bottom of the isosceles trapezoid; use two sets of motorized twisted steel wire ropes to connect the other end of the V-shaped insulator string 9, and the steel wire ropes pass through the iron tower 10. The hoisting block is lifted to the set position by winch traction, and after being connected with the iron tower 10, the suspension of four sets of pay-off blocks 8 is completed; this installation process is more convenient.

During the wire spreading process, the four sets of pay-off tackles 8 are equally high and evenly stressed, and when the board passes through the pay-off tackle 8, the tackle hanger is stable, reliable and has good passability.

When disassembling, during the installation process of the linear tower accessories, first use the wire lifter to lift the wire, use the motorized winch for traction control, untie the wire release tackle 8 from the tackle hanger one by one and drop it to the ground, and then use the flexible nylon sling Fix the V-shaped insulator string 9 with the lever block, and adjust it to the desired position, use the motorized winch to control the connection between the pulley hanger and the V-shaped insulator string 9, and then put down the pulley hanger; With the cooperation of the gourd, the installation of the wire clip joint plate, the wire clip and the fixing of the wire are completed. The dismantling process of the whole pulley hanger is simple, and the clip connecting plate can be quickly and smoothly installed in place.

Since four groups of three-wheel pay-off tackles 8 are suspended on each pole of the iron tower, in order to simplify the layout and suspension of the tackle, and to facilitate the follow-up wire tightening construction and accessory installation operations, the present invention adopts 4 × "one pull 2" for the eight-split large-section wire The suspension method of the pulley in the "mode was analyzed and improved, and the existing V-shaped insulator strings and fittings were fully utilized to develop four sets of three-wheel wire pulley hangers, and four sets of three-wheel pay-off pulleys were suspended on the same platform at the same time. The hanger on the pulley hanger can well solve the shortcomings of the independent suspension of the pulley, thereby reducing the workload of the pulley suspension, and achieving the purpose of equal height and levelness of the pay-off block, and improving the stringing quality, construction efficiency and safety. and reduce construction costs.

Claims (7)

1. The utility model provides an eight split large cross-section wire tension stringing coaster stores pylon which characterized in that: this coaster stores pylon is isosceles trapezoid's multilayer frame structure, the both ends at the isosceles trapezoid upper base all are equipped with link plate B (5) that are used for being connected with V type insulator chain (9), and these waist trapezoids go to the bottom along length direction evenly install four link plate A (4), two link plate A (4) wherein install in the both ends that the isosceles trapezoid went to the bottom, every link plate A (4) are gone up and are all connected unwrapping wire coaster (8), four through parallel link plate (6) unwrapping wire coaster (8) wait to hang on the coaster stores pylon.

2. The eight-split large-cross-section wire tension stringing trolley hanger of claim 1, wherein: the tackle hanging frame is divided into an isosceles trapezoid frame (1) and an inner frame (2) located in the frame (1), and the inner portion of the frame (1) is divided into an upper layer and a lower layer through the transverse inner frame (2).

3. The eight-split large-cross-section wire tension stringing trolley hanger of claim 2, wherein: two ends of a frame (1) as the upper bottom of the isosceles trapezoid are respectively connected with a hanging plate B (5), the frame (1) as the lower bottom of the isosceles trapezoid is uniformly connected with four hanging plates A (4) along the length direction, the joint connecting the two hanging plates B (5) and the joint connecting the two hanging plates A (4) with the lower bottom positioned in the middle are in cross connection through an inner frame (2), namely the two inner frames (2) for connection are in an X shape, and the intersection point is connected with the middle point of the horizontal inner frame (2) through a connecting plate (3); the connecting parts of two hanging plates A (4) positioned in the middle of the isosceles trapezoid lower bottom are respectively connected with the two ends of the transverse inner frame (2) through connecting plates (3) through the inner frame (2).

4. The eight-split large-cross-section wire tension stringing trolley hanger of claim 2, wherein: the frame (1) is a channel steel, and the inner frame (2) is an angle steel.

5. The eight-split large-cross-section wire tension stringing trolley hanger of claim 2, wherein: the transverse inner frame (2) is parallel to the upper bottom and the lower bottom of the isosceles trapezoid.

6. The method for disassembling and assembling the eight-split large-section conductor tension stringing pulley hanger according to any one of claims 1 to 5, wherein the method comprises the following steps:

when the device is installed, the upper yoke plates (7) of the four groups of paying-off pulleys (8) are respectively connected with the four hanging plates A (4) on the lower bottom of the isosceles trapezoid through the parallel hanging plates (6), and the four groups of paying-off pulleys (8) are hung on the pulley hanging frames in equal height; then, one end of each group of V-shaped insulator strings (9) is connected with the hanging plates B (5) at the two ends of the upper bottom of the isosceles trapezoid; two sets of motor-driven winching steel wire ropes are connected with the other end of the V-shaped insulator string (9), the steel wire ropes are dragged and lifted to a set position through a hoisting tackle on an iron tower (10) by a winching machine, and the four sets of paying-off tackle (8) are hung after being connected with the iron tower (10);

when the cable is disassembled, firstly, the wire is lifted by the wire lifter, the motorized winching is used for traction control, the paying-off tackle (8) is separated from the tackle hanging frame one by one and is placed on the ground, then the V-shaped insulator string (9) is fixed by the flexible nylon hanging strip and the lever block and is adjusted to a required position, the motorized winching is used for controlling the separation of the connection part of the tackle hanging frame and the V-shaped insulator string (9), and then the tackle hanging frame is put down; and finally, the installation of the wire clamp yoke plate and the wire clamp and the fixation of the wire are completed under the matching of the lever block.

7. The disassembling and assembling method according to claim 6, characterized in that: in the process of spreading the lead, the four sets of the paying-off pulleys (8) are equal in height and are stressed uniformly.

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