CN101277002A - Construction Method of Concrete Pole for 10kV Double Circuit Distribution Line - Google Patents

Abstract

The construction method for erecting concrete poles of 10kV double-circuit distribution lines with live electricity is characterized in that at the operating point where concrete poles need to be erected, an insulating sheath is installed on each live distribution line conductor by using an insulating lifting vehicle, and then the insulating ropes are installed. They are respectively fixed in the middle of each insulating sheath, and using the self-slack of the distribution line conductors, use insulating ropes to pull the six live distribution line conductors on the ground to the outside of the line, until the two line conductors are separated. The horizontal distance reaches and remains between 3.5 meters and 4 meters; then the vertical pole to be erected can be completed at the operating point where the erected concrete pole is erected; and then the wire and accessories are assembled by the live operator on the pole; Finally, the position of the wires of the distribution line is restored, and the live connection is completed, and the construction is completed. The method of the invention is safe in operation and high in efficiency.

Description

Construction Method of Concrete Pole for 10kV Double Circuit Distribution Line

technical field

The invention relates to a construction method for live assembly of concrete poles in a 10kV double-circuit power distribution line of an electric power system.

Background technique

At present, in the live assembly operation of concrete poles for 10kV double-circuit power distribution lines in the power system, the double-circuit conductors are arranged up and down on the same pole. Insulation, so the main method used is to wrap the upper part of the rod body with insulating cloth to form an insulator for assembly. This method has the following disadvantages:

1. The operation procedure is cumbersome: according to the position where the concrete pole needs to pass through the double-circuit wire during the erection process, a considerable length of insulating cloth is wrapped and fixed before the pole can be erected; when the pole tower is erected, the insulating cloth needs to be removed , and then the work of installing concrete rod iron accessories can be carried out.

2. Low safety factor: During the construction of concrete pole assembly and iron accessories, because the double-circuit line is charged and the distance is small, during the installation process, it is necessary to add safety measures according to the site conditions, strengthen ground monitoring, and work on poles Personnel also need to be very careful, so as not to cause a short circuit, so the potential safety hazard is relatively large.

3. Low work efficiency: due to the cumbersome operation procedures of the above-mentioned method, the safety factor is low, and the assembly of the wire cross arm and the fuse cross arm behind the vertical pole is very difficult and dangerous, so the work efficiency is difficult to improve.

Contents of the invention

In order to avoid the shortcomings of the above-mentioned prior art, the present invention provides a construction method for concrete poles of live assembled 10kV double-circuit power distribution lines. By referring to the live working method of power transmission lines, the safety distance between lines is increased to improve Operation safety, improve work efficiency, and simplify the live assembly of concrete poles with vertically arranged conductors in double-circuit power distribution lines.

The present invention solves technical problem and adopts following technical scheme:

The characteristics of the construction method of the concrete pole of the live assembled 10kV double-circuit power distribution line of the present invention are to operate according to the following steps:

a. At the operating point where concrete poles need to be erected, the live workers use the insulating lifting vehicle to install insulating sheaths on each live distribution line conductor, and then fix six insulating ropes to the middle of each insulating sheath , and then the ground personnel use the self-slack of the distribution line conductors to use insulated ropes to pull the six live distribution line conductors to the outside of the line, until the horizontal distance between the two line conductors reaches and maintains Between 3.5 meters and 4 meters;

b. Utilize a crane to complete the vertical pole of the concrete pole to be assembled on the operating point of the erected concrete pole;

c. Assemble wires and accessories including fuse crossarms, pillar porcelain bottles, and lightning arresters by live workers on poles. After the operation is completed, live workers get off the poles to a safe zone;

d. The ground workers restore the position of the six distribution line wires, and then the live workers use the insulation lifting vehicle to fix the wires live, and complete the live fire connection, and the construction is completed.

The length of the insulating sheath in the present invention is 3 meters.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. The present invention adopts the method of pulling apart the charged wires with electricity, so that the horizontal distance between the two line wires is kept between 3.5 meters and 4 meters, which can effectively avoid the phenomenon of short circuit of the wires, and ensure the personal safety of the operators. Greatly increased job security.

2. In the present invention, since the safety distance between the double-circuit wires can be guaranteed, the cement pole does not need to be wrapped and removed for insulation, and the procedure is simple.

3. Due to the large safety distance between the double-circuit conductors, the present invention can conveniently and quickly assemble concrete poles, install iron accessories on poles and fix conductors, greatly improving work efficiency.

Description of drawings

Fig. 1 is the schematic diagram of construction method of the present invention.

FIG. 2 is a schematic top view of FIG. 1 .

Labels in the figure: 1 insulating rope, 2 distribution line wire, 3 concrete pole to be assembled, 4 insulating sheath.

The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings.

Detailed ways

In this embodiment, the conductors of the 10 kV double-circuit line are vertically arranged, the distance between the poles is 45 meters, the length of the cross arm is 2.1 meters, and the poles of the original line and the new concrete poles are 15 meters:

Referring to Figure 1 and Figure 2, the specific construction is carried out as follows:

1. Determine the position of the new vertical concrete pole. It is recommended to set it at the position between the two poles, that is, 22.5 meters, where the conductor has the largest slack, which is convenient for construction. Transport the 15-meter-long concrete pole in place in advance, and dig the pole hole.

2. In front of the pole, under the command of the person in charge of the on-site work, the insulated bucket arm truck is placed in a position suitable for live work on one side of the line. The insulated arm truck must maintain an effective insulation length of 1 meter during operation, and the safe distance between the metal part and the charged body during lifting and turning motions shall not be less than 1 meter. When electrified lifting, falling, and moving wires left and right, the minimum distance to crossed objects, buildings, and parallels shall not be less than 1 meter. The arm truck should be well grounded, the engine of the bucket arm truck must not be turned off during operation, and overloading is strictly prohibited in the working bucket. The lifting and lowering speed of the working bucket should not be greater than 0.5m/s, and the speed of the outer edge of the working bucket should not be greater than 0.5m/s when the slewing mechanism of the bucket arm truck is rotating.

3. Before entering the working bucket, the operators in the insulating working bucket must wear insulating safety helmets, insulating boots, insulating clothing, insulating gloves and outer protective gloves. The on-site guardians will check, and the operators should fasten their safety belts after entering the working bucket. And buckle the buckle on the special fixed point of the working bucket, and put the shielding appliance and the insulating rope for pulling the wire into the working bucket.

4. The live working personnel in the working bucket operate the working bucket of the bucket arm truck to reach the top of the working point. After adjusting the position, take the rod hole as the center point and insulate the conductors 2 of the three-phase power distribution line on one side with the insulating sheath 4 respectively. For shielding, when installing the insulating sheath 4, it should be installed in order from the charged body or grounding body closest to the body, that is, according to the principle of from near to far, for multi-layer distributed equipment, it should be installed from the lower layer to the upper layer in sequence, each phase power distribution The shielding length of the line wire 2 is not less than 3 meters. Fasten the insulating rope 1 that is used to pull the distribution line conductor 2 on the insulating sheath 4 simultaneously, and the other end is put to the ground. Then the live operator returns to the ground and transfers the arm truck to another side of the line, insulates and shields the three-phase distribution line conductor 2 on the other side in the same way and fastens the insulating rope, and the live operator returns to the ground. Through the insulation and shielding of the six live distribution line conductors 2, it is possible to prevent the conductors from touching each other during the working process to cause a short circuit, and to prevent electric shock caused by contact with personnel.

5. Under the unified command of the person in charge of the work, the ground operators concentrate on one side of the line, and use the insulating rope 1 to pull out the three-phase power distribution line conductor 2 on the side to the outside of the line from bottom to top and fix it on the ground temporarily. on the pile. Then move to the other side of the line and pull the side wire apart in the same way and fix it firmly. During the process of pulling the wires, the distance of the wires pulled, the force of the wires and the safety distance to the crossing objects must always be observed under the line. Through the above work, ensure that the horizontal distance between the wires above the newly erected concrete poles reaches and remains between 3.5 meters and 4 meters, so as to facilitate the safe working space when the concrete poles are erected in the next step and the accessories on the poles are installed.

6. Under the unified command of the person in charge of the work, the crane used to lift the concrete pole 3 to be assembled is located at the operation point, and then the crane puts down the hook from the middle of the drawn live distribution line conductor 2, and puts the pole head The root of the pole is lifted and inserted into the pole hole, and then the pole body is slowly erected and vertical, and the construction personnel backfill the pole hole.

7. The workers on the pole should mount the pole to install wires and fuse crossarms, as well as accessories such as porcelain bottles and lightning arresters, and then lower the pole to a safe zone after connecting the lead wires between the accessories.

8. After the workers on the pole have finished their work and all evacuate, the working bucket of the insulated bucket arm truck operated by the live workers is raised to the position of the cross arm, and the metal part of the insulator and the cross arm are insulated and shielded to prevent the wires from being damaged during the work process. Short circuit through metal parts.

9. Under the command of the person in charge of the work, the ground personnel first slowly loosen the upper phase wires of the two lines to the front of the newly installed cross-arm, and the live workers in the work bucket hold up the wires with their hands wearing insulating gloves and put them into the Bind firmly in the insulator fixing groove, and then remove the insulating rope and the insulating sheath on the wires on the side that does not need to be connected to the fire; after that, the fixing work of the middle phase, lower phase wires and the other side of the line is completed in the same manner.

10. After the person in charge of the work checks that the newly installed fuse is in the open state, he can order the live fire connection. The live operator in the work bucket measures the length of the lead wires and cuts off the excess, and then separates the 3 lead wires and uses them in parallel. The clamp is connected to the main line. If there is a lightning arrester that needs to be connected, also carry out live fire connection according to the above method.

11. After the operator in the working bucket checks that all the connecting wire clips and insulator binding wires are correct, first remove the wire insulation sleeve, and then remove the shielding device for the cross-arm insulator. When removing the shielding device, it should start from the farthest away from the operator Dismantling towards the nearest one by one, multi-layer distributed equipment should be dismantled from the upper layer downwards, and the operators return to the ground after all the work is completed.

Claims (2)

1. The construction method of concrete poles for 10kV double-circuit distribution lines with live electricity is characterized by the following steps: a. At the operation point where concrete poles need to be erected, the live workers use the insulation lifting vehicle to install the insulation sheath (4) on each live distribution line conductor (2), and then install the six insulation ropes (1) They are respectively fixed in the middle of each insulating sheath (4), and then the ground personnel use the self-slack of the distribution line conductors (2) to use insulating ropes (1) to connect the six live distribution line conductors (2) to the line respectively. The outer sides of the wires are pulled toward each other until the horizontal distance between the two line conductors reaches and remains between 3.5 meters and 4 meters; B. Utilize a crane to complete the vertical pole of the concrete pole (3) to be assembled on the operating point of the erected concrete pole; c. Assemble wires and accessories including fuse crossarms, pillar porcelain bottles, and lightning arresters by live workers on poles. After the operation is completed, live workers get off the poles to a safe zone; d. Restoring the positions of the six distribution line wires (2) by the ground workers, and then the live workers use the insulated lifting vehicle to fix the wires live, and complete the live fire connection, and the construction is completed. 2. The method for constructing concrete poles for live assembled 10kV double-circuit distribution lines according to claim 1, characterized in that the length of the insulating sheath (4) is 3 meters.

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