WO2015007138A1

WO2015007138A1 - Energized deicing device for overhead power transmission line

Info

Publication number: WO2015007138A1
Application number: PCT/CN2014/080695
Authority: WO
Inventors: 尚东升; 刘伟; 秦艳军; 张道武; 钱俊国; 高鹏飞; 龚自涛
Original assignee: 国家电网公司; 国网河北省电力公司邯郸供电分公司
Priority date: 2013-07-16
Filing date: 2014-06-25
Publication date: 2015-01-22
Also published as: CN103414136A; CN103414136B

Abstract

An energized deicing device for an overhead power transmission line, comprising an insulated deicing rod (1), wherein the deicing rod is arranged at one side of a power transmission line through a carrier bracket, and a drive mechanism is provided on the carrier bracket. The carrier bracket comprises two vertical bars (21) arranged in parallel, the two vertical bars being positioned by at least two cross bars (22, 23) arranged in parallel. The top end of each of the vertical bars is respectively suspended on a transmission conductor through a suspension mechanism (24). The deicing rod is vertically arranged at the end of the first cross bar (22) protruding from the vertical bar, and the height of the deicing rod corresponds to the top end height of the vertical bar. The drive mechanism comprises a drive wheel (31) and an insulating transmission rope (32) wound around the drive wheel. The deicing device has a simple structure, and can perform an energized deicing operation in the case where there is no power cut in the whole line, thereby effectively guaranteeing the reliability of power supply quality of an electric power system on the premise of improving the deicing operation efficiency.

Description

Overhead technical field

The invention relates to the field of electric power technology, in particular to a special device used in the operation of a transmission line. Background technique

In power transmission and transformation projects, wire icing is common, and failures caused by ice coating on transmission lines seriously affect the normal operation of the power system. The ice coating of the wire is a complicated process. The amount of ice coating is related to the wire diameter, the diameter of the cold water droplets, the air volume, the wind speed, the wind direction, the temperature and the ice time. The ice coating on the transmission line can cause many kinds of hazards such as wire dancing, tilting of the tower, collapse of the tower, disconnection of the transmission line, and flashover of the insulator, further causing major accidents.

At present, there are two main methods for de-icing of overhead transmission lines: 1) Mechanical method, which breaks off the physical structure of ice coating on the transmission line to achieve the purpose of deicing. The mechanical deicing method mainly includes the sanding friction deicing and the stick tapping and deicing. The sanding friction deicing can only break the ice coating at the top of the transmission line, and the ice coating under the transmission line cannot be eliminated, and the workload is large. The effect is poor; although the stick can be used to remove ice, although the ice around the transmission line can be broken, it is impossible to break the transmission line with a large height due to the length of the stick. 2) The thermal method converts electrical energy into heat for melting ice. This method uses electric current to heat the ice-covered wire for effective deicing. The main method of application is to melt the ice by the DC device, that is, by applying a DC voltage to the transmission line and short-circuiting at the end of the transmission line, the wire is heated to melt the transmission line. However, this method has the disadvantages of large energy loss, high equipment cost, and small application range, and requires full line power outage operation, which is not suitable for use in China where power supply is advanced. Summary of the invention

The technical problem to be solved by the present invention is to provide an overhead transmission line deicing device which is highly efficient and capable of live operation.

In order to solve the above technical problems, the technical solution adopted by the present invention is:

Overhead transmission line charged de-icing device, including vertical transmission line set for removing transmission lines An ice-covered insulated de-ice bar, the de-icing bar is disposed on one side of the transmission line through a carrier frame for carrying the de-icing bar, and the carrier frame is provided with a driving mechanism for driving the de-icing rod to travel;

The carrier frame includes two vertical rods arranged in parallel, and the two vertical rods are positioned by at least two cross bars arranged in parallel, wherein the first cross bar is disposed in the middle of the two vertical bars, and the first cross bar is One end extends out of the vertical rod; the second cross rod is fixedly connected to the lower ends of the two vertical rods; the top ends of each of the vertical rods are respectively suspended by the suspension mechanism on the power transmission line;

The de-icing rod is vertically disposed at an end of the first cross bar extending from the vertical rod through a T-shaped hollow connecting member, and the height of the de-icing rod corresponds to the top end height of the vertical rod;

The drive mechanism includes a drive wheel fixedly disposed on a first crossbar between the two vertical bars and an insulated drive cable wound on the drive wheel for driving the drive wheels to travel.

The specific structure of the suspension mechanism is as follows: the suspension mechanism comprises a π-type bracket fixedly connected to the top end of the vertical rod, and the first leg of the π-type bracket is fixedly connected with the top end of the vertical rod; The rod is provided with a wheel on the power transmission line for reducing friction.

The improvement of the suspension mechanism is that: the first leg of the Π-shaped bracket and the vertical rod are connected by a curved portion bent toward the second leg of the π-shaped bracket.

The improvement of the present invention is that: the two suspension mechanisms are respectively disposed opposite to each other and symmetrically disposed at the top ends of the two vertical rods, and the vertical plane of the center connecting lines of the two suspension mechanism runners and the two vertical rods are located The plane is parallel.

The de-icing bar of the present invention is improved in that: the de-icing bar is an elongated truncated cone-shaped structure, and the small end face of the elongated circular-shaped de-icing bar is disposed in the T-shaped hollow connecting member.

A further improvement of the de-ice bar of the present invention is that: a strong spring for increasing the toughness of the de-ice bar is disposed between the elongated frustum-shaped de-ice bar and the T-shaped hollow connector.

The de-ice bar of the present invention is further improved in that: the elongated truncated cone de-icing bar and the strong spring are provided with two sets and are symmetrically connected to the upper and lower ends of the T-shaped hollow connecting piece.

The improvement of the driving mechanism of the present invention is that the driving wheel is pierced and fixedly disposed on a side of the first crossbar adjacent to the de-icing stick. According to a further improvement of the present invention, the outer wall of the driving wheel of the carrier frame, the suspension mechanism and the driving mechanism is coated with a rustproof layer.

The improvement of the present invention is also that a third crossbar for reinforcing is disposed between the two vertical bars between the first crossbar and the second crossbar.

The technical advances achieved by the present invention are due to the use of the above technical solutions:

The invention has the advantages of simple structure, can carry out deicing operation under the condition that the whole line is not de-energized, and effectively ensures the reliable power supply quality of the electric system under the premise of improving the efficiency of the deicing operation; in addition, the invention uses the waste materials It can be made by secondary use, low cost and easy to promote; and the invention only needs manual participation in the use process, no need to use power source, and saves resources.

The suspension mechanism of the present invention is provided with a rotating wheel on the bracket, which not only enables the invention to be smoothly suspended on the wire, but also reduces the friction between the invention and the power transmission line, and facilitates the operator to perform the deicing operation during the operation. , save time and energy. The transition between the suspension mechanism and the vertical rod is connected by a curved portion to ensure that the vertical plane where the centers of the two runners coincide with the plane where the two vertical rods are located, further reducing the driving force during the operation, and the operator is in the process of operation. The invention can be used to complete the deicing and travel with a small force. The symmetry of the two suspension mechanisms ensures the stability of the transmission line during deicing, prevents the transmission line from galloping during deicing, and ensures a stable attitude of the transmission line.

The deicer bar of the present invention has an elongated truncated cone structure, and the small end face is disposed toward the second crossbar, so that the large end face of the deicer bar can be in contact with the power transmission wire, and can be applied to the deicer in the deicing process. Increase the force and improve the deicing effect. Moreover, the de-ice bar is preferably made of a round bar, which can both provide insulation and reduce the weight of the present invention without damaging the transmission wire. A strong spring between the de-ice bar and the connecting member of the second crossbar is used to increase the toughness of the de-icing bar, so that the de-icing bar can buffer the reaction force generated during the collision with the transmission wire during the operation, and enhance the de-icing effect. Two sets of de-ice sticks and strong springs are provided to enhance the balance stability during the operation of the present invention, and can also be used to rotate the de-icing stick located below when the upper de-icing stick is severely worn, and continue to use. The biasing of the driving wheels in the driving mechanism of the present invention facilitates reducing the driving force loss during the traveling of the present invention and reducing the labor of the operator. The drive wheel, the carrier frame and the rust-proof layer applied to the suspension mechanism are used to extend the service life of the present invention. a third crossbar disposed between the first crossbar and the second crossbar for reinforcing the carrier frame; when the third crossbar is disposed, the length of the vertical bar can also be increased to facilitate the present invention from the power transmission wire When the upper part is removed, the second cross bar is lifted up by the insulating rod, which is convenient for the operator to operate. DRAWINGS

Figure 1 is a schematic view of the structure of the present invention;

Figure 2 is a side elevational view of the carrier frame of the present invention.

Among them: 1. De-ice bar, 11. T-shaped hollow connector, 12. Strong spring, 21. Vertical bar, 22. First crossbar, 23. Second crossbar, 24. Suspension mechanism, 241. 2411. First leg, 2412. Second leg, 242. Support bar, 243. Runner, 25. Bend, 26. Buckle, 31. Drive wheel, 32. Insulated drive line.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

An electric de-icing device for an overhead transmission line, the structure of which is shown in Fig. 1, comprising a de-icing stick 1, a carrier frame and a driving mechanism. De-icing bar 1 Vertical transmission line setting, and located on the side of the transmission line, used to remove ice coating on the transmission line; the carrier frame is used to carry the de-icing bar, and the driving mechanism is used to drive the de-icing bar to travel forward.

A side view of the carrier frame is shown in Figure 2. The carrier frame includes two vertical rods 21 arranged in parallel, and the two vertical rods are positioned by at least two cross bars arranged in parallel. In this embodiment, three cross bars are provided. The first crossbar 22 is fixedly connected to the middle of the two vertical rods 21 through the semicircular buckles 26, and one end of the first crossbar protrudes from the outside of the vertical rod 21 for fixing the deiccolt; the second crossbar 23 Fixedly connected at the lower end of the two vertical rods; the third cross rod is disposed between the first cross rod and the second cross rod for reinforcing the vertical rod. The top end of each of the vertical rods 21 is suspended from the power transmission line by a suspension mechanism 24, respectively.

The suspension mechanism 24 includes a Π-shaped bracket 241 fixedly coupled to the top end of the vertical rod 21, and the first leg 2411 of the Π-shaped bracket 241 is re-connected with the top end of the vertical rod through the curved portion 25, and the curved portion faces the second leg 2412 of the Π-shaped bracket 241. Bending; the middle of the two legs of the Π-shaped bracket 241 is set by the support rod 242 Wheel 243, the wheel 243 is located on the power transmission line during use to reduce the friction between the present invention and the power transmission line. In this embodiment, the two suspension mechanisms are respectively disposed opposite to each other and symmetrically disposed at the top ends of the two vertical rods, and the vertical plane where the center lines of the two suspension mechanism wheels are located is parallel to the plane where the two vertical rods are located, as shown in the figure. 1 to ensure that it is suspended smoothly on the power transmission line during use to prevent the torsion resistance from affecting the deicing efficiency.

The de-ice bar 1 is vertically disposed at the end of the first cross bar 22 extending from the vertical bar through the T-shaped hollow connector 11 , and the height of the de-icing bar corresponds to the height of the top end of the vertical bar.

In the present embodiment, the de-ice bar 1 has an elongated truncated cone structure, and the small end face of the elongated truncated cone de-icing bar is disposed in the T-shaped hollow connector 11. A strong spring 12 is disposed between the elongated round-shaped de-ice bar and the T-shaped hollow connector 11, and the strong spring is used to increase the toughness of the de-icing bar during use. The elongated round table-shaped deicing stick 1 and the strong spring 12 are provided in two sets and are symmetrically connected to the upper and lower ends of the T-shaped hollow connecting member 11.

The drive mechanism of the present invention includes a drive wheel 31 and an insulated drive line 32. The drive wheel 31 is coupled to the first crossbar 22 between the two vertical bars and is fixedly mounted on the side of the first crossbar adjacent to the de-ice bar 1. An insulated drive cable 32 is wound around the drive wheel 31 for driving the drive wheel to travel.

In the embodiment, the carrier frame, the suspension mechanism and the outer wall of the driving wheel of the driving mechanism are coated with an anti-rust layer to prevent rust and reduce the service life during storage or use.

The method of use of the present invention is as follows:

Prior to use of the present invention, the invention was first suspended by means of a heel block to the power transmission line. During the suspension process, the transmission wires should be accurately located in the wheel grooves of the two runners. During use, by controlling the insulated drive rope wound on the drive wheel on the ground, the de-ice bar can be controlled to break the ice on the transmission wire, and can also be controlled by the drive wheel by controlling the insulated drive rope. The carrier frame is controlled to travel, thereby achieving deicing operation of the entire line. After the deicing operation is completed, the invention can be removed from the power transmission line by the heel slider; or the second crossbar can be lifted up by the insulating rod, so that the suspension of the suspension mechanism can be detached from the transmission line, and then The invention is then removed by the heel slider to reduce the workload of the operator and improve work efficiency.

Claims

1. An electric de-icing device for an overhead transmission line, characterized in that: an insulated de-icing rod (1) for removing ice on a transmission line, which is provided by a vertical transmission line, the de-icing rod (1) being used for carrying a de-icing rod The carrier frame is disposed on one side of the transmission line, and the carrier frame is provided with a driving mechanism for driving the de-icing rod to travel;

The carrier frame comprises two vertical rods (21) arranged in parallel, and the two vertical rods are positioned by at least two cross bars arranged in parallel, wherein the first cross bar (22) is arranged on the two vertical bars (21) a central portion, and one end of the first crossbar extends beyond the vertical rod; the second crossbar (23) is fixedly coupled to the lower ends of the two vertical rods; the top ends of each of the vertical rods (21) are respectively passed through a suspension mechanism (24) Hanging on the transmission line;

The de-ice bar (1) is vertically disposed on the end of the first cross bar (22) extending through the T-shaped hollow connector (11), and the height of the de-icing bar corresponds to the height of the top end of the vertical bar;

The drive mechanism includes a drive wheel (31) fixedly disposed on a first crossbar (22) between two vertical rods and an insulated drive rope wound on the drive wheel (31) for driving the drive wheel to travel ( 32).

2. The overhead de-icing device for an overhead transmission line according to claim 1, wherein: said suspension mechanism (24) comprises a 支架-shaped bracket (241) fixedly attached to a top end of the vertical rod (21), the 支架-shaped bracket

The first leg (2411) of (241) is fixedly connected to the top end of the vertical rod; the middle portion of the two legs is provided with a runner on the power transmission line for reducing friction through the support rod (242) ( 243).

3. The overhead de-icing device for an overhead transmission line according to claim 2, wherein: the first leg (2411) of the Π-shaped bracket (241) and the vertical rod (21) pass toward the Π-shaped bracket ( 241) The second leg (2412) is bent and connected to the bent portion (25).

The overhead de-icing device for an overhead transmission line according to any one of claims 2 to 3, wherein: the two suspension mechanisms are respectively disposed opposite to each other and symmetrically disposed at the top ends of the two vertical rods, and two The vertical plane of the center line of the suspension mechanism runners is parallel to the plane in which the two vertical bars are located.

5. The overhead de-icing device for an overhead transmission line according to claim 1, wherein: The de-icing rod (1) is an elongated truncated cone-shaped structure, and the small end face of the elongated truncated-shaped de-icing rod is disposed in the T-shaped hollow connecting member (11).

6. The electric de-icing device for overhead transmission lines according to claim 5, wherein: the elongated circular-shaped de-icing bar and the T-shaped hollow connecting member (11) are provided with a strong spring for increasing the toughness of the de-icing rod. (12).

7. The electric de-icing device for overhead transmission lines according to claim 6, wherein: said elongated round-shaped de-icing bar and the strong spring (12) are provided with two sets and are symmetrically connected to the T-shaped hollow connecting member.

The upper and lower ends of (11).

8. The overhead de-icing device for an overhead transmission line according to claim 1, wherein: said driving wheel (31) is threaded and fixedly disposed on a side of the first crossbar (22) adjacent to the de-icing bar (1) .

9. The overhead de-icing device for an overhead transmission line according to claim 1, wherein: the carrier frame, the suspension mechanism, and the outer wall of the driving wheel of the driving mechanism are coated with an anti-rust layer.

10. The electric de-icing device for overhead transmission lines according to claim 1, wherein: a third for reinforcing is disposed between the two vertical bars between the first cross bar and the second cross bar Crossbar.