CN204905757U - Tightly, take out stitches and use coaster - Google Patents

Abstract

A pulley for tightening and removing stitches. It includes connecting bolts, rollers, roller shafts and roller frames; the roller frame is a square structure; the center of the roller runs through a roller shaft, and the two ends of the roller shaft are installed in the middle of the two sides of the roller frame in a rotating manner; the connecting bolts The lower end is connected to the middle part of the top edge of the roller frame, and the upper end is fixed on the cross arm. The pulley for tightening and removing stitches provided by the utility model has the following beneficial effects: (1) the included angle between the cross arm, the wire tensioner and the pulley is reduced. (2) The distance between the cross arm and the pulley is only 300 mm, so when the wire is tightened, it can reduce over-traction and damage to the cross arm. (3) The price does not exceed 160 yuan, and can be reused several times. (4) The construction is simple and fast, and the safety performance is good.

Description

A pulley for tightening and removing stitches

technical field

The utility model belongs to the technical field of electric power system auxiliary devices, in particular to a pulley for tightening and removing wires.

Background technique

During the construction of electric power overhead lines, it is sometimes necessary to loosen or tighten the conductors according to construction requirements. Figure 1 is a schematic diagram of a currently commonly used tightening and unwinding process. Fig. 2 is the schematic diagram of the connection state of cross arm, rope hanging ring and block used at present. As shown in Fig. 1 and Fig. 2, the overhead line is usually provided with a plurality of iron towers 1 at intervals along the erection path on the ground, and a plurality of cross-arms 2 are arranged on the iron towers 1, insulators 3 are arranged on the cross-arms 2, and three-phase conductors 4 are respectively It is connected between corresponding insulators 3 on two adjacent iron towers 1 . Now take loosening the wire as an example to explain. When it is necessary to loosen a certain phase wire, first fix the upper end of the wire rope cover 8 on the cross arm 2, then hang a pulley 9 on the lower end of the wire rope sleeve 8, and then use it from the traction device 10. After the traction rope 5 passes through the block 9, it is connected with the wire tensioner 6 installed on the wire 4, and the wire clamp 7 is installed between the wire tensioner 6 and an insulator 3, and then the traction device 10 is used to tighten the traction rope 5 , through the pulling rope 5 and the wire tensioner 6 acting on the wire 4, pulling the wire 4 makes the wire clamp 7 and the adjacent insulator 3 loose, so that the connection between the insulator 3 and the cross arm 2 can be removed. The traction device 10 is then released, so that the wire 4 is released. But, there is following problem in this tight pay-off method: as mentioned above, because tackle 9 is to be connected with cross arm 2 by wire rope cover 8, so the distance between cross arm 2 and the upper pulley of tackle 9 is 600 millimeters, and the distance between pulley and wire 4 is connected to the fittings of 1.2 meters, and the structural design of the pulley 9 is unreasonable, so a tight angle is formed between the crossarm 2, the wire tensioner 6 and the pulley, so that when the traction rope 5 is tightened, the wire 4 will be enlarged. This will cause deformation of the cross arm 2, resulting in unbalanced sag of the three-phase conductor 4, increased displacement of the top of the iron tower 1, and greater damage to the structure of the iron tower 1. And in this case, only 60,000 yuan will be needed to replace the three-phase cross arm.

Contents of the invention

In order to solve the above problems, the purpose of this utility model is to provide a pulley for tightening and removing stitches.

In order to achieve the above object, the pulley for tightening and dismantling provided by the utility model includes connecting bolts, rollers, roller shafts and roller frames; wherein the roller frame is a zigzag structure; the center of the rollers runs through a roller shaft, and the two ends of the roller shaft It is installed in the middle of both sides of the roller frame in a rotating manner; the lower end of the connecting bolt is connected to the middle of the top edge of the roller frame, and the upper end is fixed on the cross arm.

Described tightening, the height of the pulley with thread removal is 300mm, width is 80mm, thickness is 40mm, and wherein the maximum diameter of roller is 80mm, and connecting bolt is φ 16 * 145mm.

The pulley for tightening and removing stitches provided by the utility model has the following beneficial effects:

(1) The angle between the cross arm and the tensioner and the trolley is reduced.

(2) The distance between the cross arm and the pulley is only 300 mm, so when the wire is tightened, it can reduce over-traction and damage to the cross arm.

(3) The price does not exceed 160 yuan, and can be reused several times.

(4) The construction is simple and fast, and the safety performance is good.

Description of drawings

Figure 1 is a schematic diagram of a currently commonly used tightening and unwinding process.

Fig. 2 is the schematic diagram of the connection state of cross arm, rope hanging ring and block used at present.

Fig. 3 is the front view of the structure of the pulley for tightening and removing stitches provided by the utility model.

Fig. 4 is a side view of the structure of the pulley for tightening and removing stitches provided by the utility model.

Fig. 5 is a schematic diagram of the connection state between the pulley for tightening and removing stitches provided by the utility model and the cross arm.

Detailed ways

The pulley for tightening and removing stitches provided by the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The same reference numerals are used for the same components as in the prior art.

As shown in Fig. 3-Fig. 5, the pulley 15 for tightening and dismantling provided by the utility model comprises a connecting bolt 11, a roller 12, a roller shaft 13 and a roller frame 14; wherein the roller frame 14 is a square structure; Through a roller shaft 13, the two ends of the roller shaft 13 are installed in the middle part of both sides of the roller frame 14 in a rotational manner;

Described tightening, the height of thread removal tackle 15 is 300mm, width is 80mm, thickness is 40mm, wherein the maximum diameter of roller 12 is 80mm, and connecting bolt 11 is φ 16 * 145mm.

The installation method of the pulley for tightening and removing wires provided by the present utility model is described as follows: only the non-stressed bolts on the cross arm 2 are removed, and the upper end of the connecting bolt 11 on the pulley 15 for tightening and removing wires is inserted into the Non-stressed bolts use screw holes, then tighten with nuts, you can complete the fixing of tight and unwired pulleys 15.

Claims (2)

1. tight, take out stitches with a coaster, it is characterized in that: described tight, taking out stitches comprises connecting bolt (11), roller (12), roller shaft (13) and turning rolls (14) with coaster (15); Wherein turning rolls (14) is square shape structure; A roller shaft (13) is run through at the center of roller (12), and the two ends of roller shaft (13) are arranged in the middle part of turning rolls (14) dual-side with rotating manner; The lower end of connecting bolt (11) is connected in the middle part of turning rolls (14) upper topside, and upper end is fixed on cross-arm (2).

2. tight, use of taking out stitches coaster according to claim 1, it is characterized in that: described tight, take out stitches with the height of coaster (15) be 300mm, width is 80mm, thickness is 40mm, wherein the maximum gauge of roller (12) is 80mm, and connecting bolt (11) is φ 16 × 145mm.