CN103560437B - A kind of optical cable pulley based on single-wheel sister block hangs and annex installation method - Google Patents

Abstract

The invention discloses an optical cable trolley suspension and an installation method for its accessories based on a single-wheel double trolley, comprising the following steps: determining the relevant parameters of the optical cable and its accessories; determining the parameters of the optical cable and the accessories used in the optical cable according to the construction design requirements, the The parameters include the type of optical cable, the structure of the clamp, and the length of the structural reinforcement strip, and refer to these parameters to select the optical cable pay-off block and related construction tools; the method is to connect the two blocks through a support rod of a certain length, The steel rope sleeve is used to hang under the vertical construction hole near the hanging point of the optical cable across the tower, and the structural reinforcement strip and the wire clamp can be installed directly between the two pulleys after the wire is tightened.

Description

An optical cable trolley suspension based on a single-wheel double trolley and its attachment installation method

technical field

The present invention is an optical cable trolley and its accessories installation method used in the wire construction of transmission lines, especially a kind of suspension of optical cable trolley based on single-wheel double trolley and its installation method in the construction of long-span UHV direct current transmission line. How to install accessories.

Background technique

The erection of optical cables is an important link in the construction of transmission lines. Under the premise of ensuring the construction quality in accordance with the construction technical standards of transmission line engineering, how to improve the work efficiency and safety of the optical cable deployment, shorten the construction period, reduce the labor intensity of personnel, and save construction costs are the key considerations in the process of wire erection construction. links. Due to the particularity of the large span construction environment, the span span is large, the construction difficulty is high, and the construction technology requirements for the stringing construction are relatively high. In the process of laying out the optical cable and installing its accessories, the suspension method of the conventional cable laying block will cause high construction difficulty and high labor intensity during the process of laying out the optical cable and installing the accessories of the optical cable, especially in the large-span construction. On the other hand, more tools are used during the installation of the optical cable clamp, and the consumption of special materials such as pre-twisted wire is too large, which increases the construction cost.

In the fiber optic cable laying and accessory installation construction of the large-span project that has been completed so far, in terms of pulley suspension, the pulley generally adopts 1 single-wheel pulley or 2 single-wheel pulleys, of which 2 single-wheel pulleys are installed front and rear, and between the two wheels There is no connecting piece, this kind of pulley suspension method, the pulley is easy to move inward due to the force during the cable deployment process, it is easy to cause the pulley to swing and make the optical cable fall out of the groove; there are also two special triangular connecting plates between the two pulleys Connection, this block suspension method, has a complex structure, which increases the difficulty of construction. In the installation of optical cable accessories, during the installation process, the optical cable is tightened symmetrically by connecting the lever hoist with a special optical cable clamp, and then the optical cable suspension clamp is installed after the pulley is removed.

1) Installation of one-wheel block accessories

(1) As shown in Figure 1, the cable lifting situation when the optical cable accessories are installed. After the optical cable is drawn and printed, first install a 9t lever block 32 and a cable clamp 33 on both sides of the optical cable support 31. The 9t lever block 32 is connected to the construction hanging hole on the tower through a 10t shackle, and then tighten the lever block at the same time. 32. Lift the optical cable, connect the pay-off block with a 3t sling, turn the 3t pulley on the tower to the ground motor winch, and remove the pay-off block.

(2) Install the pre-twisted wire according to the imprint and the pad printing value provided by the technician. After the winding is completed, install the suspension wire clamp and link it with the suspension hardware, then loosen the lever block 32 to force the suspension wire clamp, and finally remove the lever block 32 and the wire clamp 33.

2) Installation of 2 unicycle tackle attachments

(1) As shown in Figure 2, after marking, measure 2 meters from the center of the cable clamp to both ends, install the optical cable tension clamp 34, and use two 9T lever hoists 32 to tighten the optical cable 35 symmetrically.

(2) Remove the pay-off block, slowly loosen the 9T lever block 32, and tighten the optical cable 35 slightly.

(3) The construction personnel wind the pre-twisted wire of the optical cable on the optical cable support and install the suspension clamp.

(4) Tighten the 9T lever block 32 symmetrically, and connect the suspension clamp with the optical cable hanging point fittings.

(5) Remove the wire lifting device and install other accessories.

Disadvantages of the above techniques:

In the process of laying out the optical cable, the trolley is easy to move inward due to the force, which may easily cause the trolley to swing and cause the optical cable to fall out of the groove; in the process of installing accessories after tightening the line, relatively many construction tools are used, which makes the construction difficult and greatly The construction work efficiency is reduced, and the consumption of special construction materials is also relatively large, which increases the construction cost.

Contents of the invention

The purpose of the present invention is to provide an optical cable trolley suspension and its accessories installation method based on a single-wheel double trolley, which is convenient for overall hoisting and construction, and protects the optical cable and avoids damage to the optical cable caused by the detachment of the optical cable.

Technical scheme of the present invention is:

An optical cable trolley suspension based on a single-wheel double trolley and an installation method for its accessories include the following steps:

The first step: Determine the relevant parameters of the optical cable and its accessories: Determine the parameters of the optical cable and the accessories used in the optical cable according to the construction design requirements. The parameters include the model of the optical cable, the structure of the clamp, and the length of the structural reinforcement strip. Refer to these parameters to Select optical cable pay-off tackle and related construction tools;

Step 2: Assembly and suspension of single wheel and double trolley; select 2 trolleys according to the type of optical cable, and connect the trolleys through support rods. Install accessories;

The third step: laying out and tightening the optical cable; the laying out of the optical cable adopts the construction method of tension laying out; the construction of the tensioning line of the optical cable is to hang the line on the side of the traction field, tighten the line on the side of the tension field, and use the "angle method" for sag observation;

The fourth step: installation of optical cable accessories; after tightening the cable, install the suspension clamp of the optical cable. After the optical cable is tightened, install the structural reinforcement bar and the clamp between the two pulleys; when the cable clamp is installed intact Finally, use two lever hoists to lift the connecting tower hanging plate of the optical cable suspension clamp to connect with the optical cable hanging point, and continuously lift the optical cable suspension clamp through the lever hoist until the connecting tower hanging plate is connected to the optical cable hanging point.

In the second step, each optical cable block is connected with a steel rope sleeve through a U-shaped ring, which is used for the connection between the block block and the construction hole of the spanning tower. to make sure.

In the fourth step, after the optical cable is tightened, the mark is measured on the optical cable between the two tackles to determine the position of the structural reinforcement strip of the suspension clamp of the optical cable, and then the structural reinforcement strip and line are carried out between the two tackles. clip installation.

In the fourth step, use two lever hoists to lift the tower hanging plate of the optical cable clamp to connect with the cable hanging point. , during the lifting process, the two lever hoists operate synchronously, and are removed when the two pulleys are not stressed.

Pads are added to the connection between the lower part of the lever block and the hanging plate of the wire clip and the connection between the upper part of the lever block and the ground load for protection.

In the fourth step, use two lever hoists to lift the tower hanging plate of the optical cable clamp to connect with the cable hanging point. , during the lifting process, the two lever hoists operate synchronously, and are removed when the two pulleys are not stressed.

Pads are added to the connection between the lower part of the lever block and the hanging plate of the wire clip and the connection between the upper part of the lever block and the ground load for protection.

The beneficial effects brought by the technical solution of the present invention:

1. In terms of cable trolley assembly: the installation method of optical cable trolley based on single wheel and double trolley has a simple structure and is convenient for overall hoisting and construction.

2. Optical cable laying and tightening: The installation method of the optical cable trolley based on single-wheel double trolleys. During the process of unwinding and tightening, the trolley has good stability, which can well protect the optical cable and avoid damage to the optical cable caused by the detachment of the optical cable.

3. Attachment installation: The installation method of optical cable pulleys based on single-wheel double pulleys plays the largest role in the installation of accessories. After the tightening is completed, structural reinforcement strips and suspension clamps can be directly installed between the two pulleys. The installation process starts with Relying on the pulley group, the construction operation is relatively simple. After the suspension clamp assembly is connected completely on the optical cable, the lever block can be connected to the clamp hanging plate to lift the connecting tower hanging plate of the optical cable pulley attachment to the optical cable hanging point on the tower to complete the connection. The installation process reduces the use of special tools and the waste of construction materials, saves engineering costs, makes the construction process simple, facilitates construction operations, and improves work efficiency.

The invention provides an optical cable pulley suspension and an installation method for its accessories in the large-span optical cable deployment construction of UHV direct current transmission lines. The method is to connect two pulleys through a support rod of a certain length, and use a steel rope sleeve to hang under the vertical construction hole near the hanging point of the optical cable spanning the tower. After the line is tightened, the structural reinforcement strip and the Installation of wire clamps. The method can effectively improve the stability of the optical cable unfolding process, reduce the construction difficulty of installing the optical cable accessories, and improve the construction work efficiency. The results of laying out optical cables in a ±800kV UHV DC transmission line over the Yellow River spanning construction show that this method has the advantages of simple structure, convenient operation, easy installation of optical cable fittings, and greatly reduced construction difficulty and construction cost.

Description of drawings

Figure 1 is a schematic diagram of the installation of a single trolley optical cable accessory;

Figure 2 is a schematic diagram of the installation of optical cable accessories using two pulleys without support rods;

Figure 3 is the structure diagram of OPGW-300 double fulcrum pre-twisted suspension clamp;

Fig. 4 is a schematic diagram of installation of the tower-crossing cable pay-off trolley of the present invention;

Fig. 5 is a schematic diagram after installation of double fulcrum pre-twisted suspension clamp structure reinforcement strips between two tackles;

Fig. 6 is a schematic diagram after the installation of the double fulcrum pre-twisted suspension clamp of the optical cable between the two pulleys;

Figure 7 is a schematic diagram of the lifting and installation of the double fulcrum pre-twisted suspension clamp of the optical cable;

Fig. 8 is a schematic diagram after the installation of the double-fulcrum pre-twisted suspension clamp for the cross-tower optical cable is completed.

detailed description

As shown in Figure 1, basic principle of the present invention and construction operation steps are as follows:

Step 1: Determine the relevant parameters of the optical cable and its accessories. According to the construction design requirements, determine the parameters of the optical cable and the accessories used in the optical cable, such as the type of optical cable, the structure of the clamp, the length of the structural reinforcement strip, etc., refer to these parameters to select the optical cable pay-off tackle and related construction tools.

Step 2: Assembly and suspension of single wheel and double tackle. Select 2 pulleys according to the type of optical cable, and the pulleys are connected by a support rod. The length of the support rod is determined according to the structure of the cable clamp used in the optical cable and the length of the reinforcement strip, which is convenient for the installation of accessories after tightening the cable. Each optical cable block is connected with a steel rope sleeve through a U-shaped ring, which is used for the connection between the block block and the construction hole of the spanning tower. The length of the steel rope sleeve should be determined according to the width of the cross arm of the spanning tower.

The third step: lay out and tighten the cable. The tension laying out construction method is adopted for the deployment of the optical cable; the construction of the optical cable tightening is to hang the line on the side of the traction field, tighten the line on the side of the tension field, and use the "angle method" for sag observation.

Step 4: Installation of optical cable accessories. The installation work of the optical cable suspension clamp should be carried out as soon as possible after the cable is tightened. After the optical cable is tightened, measure the mark on the optical cable between the two pulleys to determine the position of the reinforcement strip of the optical cable suspension clamp structure. Between the two pulleys Install structural reinforcement strips and wire clips between them. When the upper cable clamp is installed, use two lever hoists to lift the tower hanging plate of the optical cable clamp to connect with the cable hanging point. Padded for protection. During the lifting process, the two lever hoists operate synchronously. When the two pulleys are not stressed, they are removed. After the pulleys are removed, continue to lift until the tower hanging plate is connected to the cable hanging point.

The specific embodiment of the inventive method:

During the wiring construction of a ±800kV UHV DC transmission line across the Yellow River, the specific installation process of the optical cable pulley and accessories is as follows:

The first step: determine the relevant parameters of the optical cable. The type of optical cable in the ±800kV UHV DC transmission line across the Yellow River is OPGW-300, as shown in Figure 3, the double-support pre-twisted suspension clamp 1 is used, and the length of the structural reinforcement strip L1=3400mm, the clamp connection The total height of the hanging board is about 600mm.

Step 2: Assembly and suspension of single wheel and double block. As shown in Figure 4, the optical cable pay-off block in the ±800kV UHV DC transmission line across the Yellow River is a nylon 1040 type block, with a wheel diameter of 1040mm, a wheel groove bottom diameter of 900mm, and a groove width of 125mm. The allowable load is 100KN. As shown in FIG. 4 , two single-wheel tackles 3 are connected back and forth through the axle centers of the tackles by using two support rods 2 . Since the length of the reinforcement line of the optical cable is L1=3400mm, in order to facilitate the installation of the optical cable clamp, the support rod 2 adopts 160 channel steel with a length of L3=4500mm. The width of the optical cable cross arm 4 is L2=2047mm, and the length of the Φ20 steel rope sleeve used for the connection between the block block and the construction hole of the spanning tower is determined to be 2 meters.

The third step: laying out and tightening the cable. In the ±800kV UHV DC transmission line, the optical cable is laid out in the way of tension laying out in the Yellow River Great Span. The optical cable tensioning construction is to hang the line on the side of the traction field and tighten the line on the side of the tension field, and use the "angle method" to observe the sag.

Step 4: Installation of optical cable accessories. The installation of the optical cable suspension clamp should be carried out as soon as possible after tightening the line. As shown in Figure 5, in the large crossing of the ±800kV UHV DC transmission line across the Yellow River, the optical cable fittings on the spanning tower adopt double fulcrum pre-twisted suspension clamps 1 . After the optical cable is tightened, measure the mark on the optical cable between the two pulleys 3 to determine the position of the structural reinforcement strip, as shown in Figure 6, directly carry out the double fulcrum pre-twisted suspension line between the two pulleys 3 The installation of the clamp 1 is based on the block block during the installation process, and the construction operation is relatively simple. As shown in Figure 7, when the cable clamp 1 is installed between the two pulleys 3, two 6-ton lever blocks 5 are used to lift the connecting tower hanging plate of the optical cable and connect with the cable hanging point, and the bottom of the lever block 5 is connected to the cable hanging point. The triangular hanging plate of the cable clip is connected, and the upper part is connected with the ground bearer, and the connection should be cushioned for protection. During the lifting process, the two lever hoists 5 operate synchronously. When the pulley block is not stressed, it is removed. After the pulley is removed, continue to lift, as shown in Figure 8, until the connecting tower hanging plate is connected with the optical cable hanging point.

Claims (7)

1. A kind of optical cable block suspension and its annex installation method thereof based on single-wheel double block, it is characterized in that: comprise the following operation steps: The first step: Determine the relevant parameters of the optical cable and its accessories: Determine the parameters of the optical cable and the accessories used in the optical cable according to the construction design requirements. The parameters include the model of the optical cable, the structure of the clamp, and the length of the structural reinforcement strip. Refer to these parameters to Select optical cable pay-off tackle and construction equipment; Step 2: Assembly and suspension of single wheel and double trolley; select 2 trolleys according to the type of optical cable, and connect the trolleys through support rods. Install accessories; The third step: laying out and tightening the optical cable; the laying out of the optical cable adopts the construction method of tension laying out; the construction of the tensioning line of the optical cable is to hang the line on the side of the traction field, tighten the line on the side of the tension field, and use the "angle method" for sag observation; The fourth step: installation of optical cable accessories; after tightening the cable, install the suspension clamp of the optical cable. After the optical cable is tightened, install the structural reinforcement bar and the clamp between the two pulleys; when the cable clamp is installed intact Finally, use two lever hoists to lift the connecting tower hanging plate of the optical cable suspension clamp to connect with the optical cable hanging point, and continuously lift the optical cable suspension clamp through the lever hoist until the connecting tower hanging plate is connected to the optical cable hanging point. 2. According to claim 1, the optical cable trolley suspension and its accessories installation method based on single-wheel double tackle, is characterized in that: in the second step, each optical cable trolley is connected with a steel rope sleeve through a U-shaped ring, For the connection between the block block and the construction hole of the spanning tower, the length of the steel rope sleeve shall be determined according to the width of the cross arm of the spanning tower. 3. According to claim 1 or 2, the optical cable trolley suspension and its accessories installation method based on single-wheel double trolley, is characterized in that: in the fourth step, after the optical cable is tightened, the optical cable between the two trolleys Measure the mark on the upper part, determine the position of the structural reinforcement strip of the optical cable suspension clamp, and then install the structural reinforcement strip and the clamp between the two pulleys. 4. The optical cable trolley suspension and its accessories installation method based on single-wheel double tackle according to claim 3, characterized in that: in the fourth step, two lever blocks are used to lift the joint tower hanging plate of the optical cable clamp It is connected to the hanging point of the optical cable. When the lower part of the lever block is connected to the hanging plate of the cable clamp, the upper part of the lever block is connected to the ground load. During the lifting process, the two lever blocks operate synchronously, and they are removed when the two pulleys are not stressed. 5. According to claim 4, the optical cable trolley suspension and its accessories installation method based on single-wheel double trolley, is characterized in that: the connection between the lower part of the lever block and the hanging plate of the wire clip and the connection between the upper part of the lever block and the ground bearer are added. Pads are used for protection. 6. According to claim 1 or 2, the optical cable trolley suspension and its accessories installation method based on single-wheel double trolley, is characterized in that: in the fourth step, two lever hoists are used to lift the joint tower of the optical cable clamp The hanging plate is connected to the hanging point of the optical cable. When the lower part of the lever block is connected to the hanging plate of the cable clamp, the upper part of the lever block is connected to the ground load. During the lifting process, the two lever blocks operate synchronously. tear down. 7. According to claim 6, the optical cable trolley suspension and its accessories installation method based on single-wheel double trolley, is characterized in that: the connection between the bottom of the lever block and the hanging plate of the wire clip and the connection between the top of the lever block and the ground bearer are added. Pads are used for protection.