CN106451200A - London tower bridge type non-powercut spanning system and spanning method of power transmission line - Google Patents

Abstract

A tower bridge type power transmission line spanning system without power failure and a spanning method. The system is mainly composed of a spanning frame on one side of the spanned line and a hydraulic lifting pole on the other side. The middle part of the spanning tower passes through a The auxiliary cross arm is hinged with a pair of aluminum alloy holding rods that can swing up and down. Multiple rows of wire supporting rods are installed on the aluminum alloy holding rods to form a combined wire supporting frame that is placed flat on the side of the crossed line; the ground is hydraulically lifted The middle part of the holding pole is also hinged with a pair of aluminum alloy holding poles that can swing up and down through an auxiliary cross arm.

Description

A tower bridge type non-stop power transmission line spanning system and spanning method

technical field

The invention relates to a system and method for crossing a Tower Bridge type power transmission line without power failure, and belongs to the technical field of power transmission line construction.

Background technique

At present, traditional methods such as setting up spanning frames and sealing the network during temporary power outages are used in the spanning construction of transmission lines. These methods require a large investment in manpower, financial resources, and tools, with low efficiency, poor economic benefits, and many risk factors. With the rapid development of the national economy, the traditional power outage construction spanning method has been unable to meet the demand for high-quality and reliable power supply, especially for high and low crossing lines that require power supply reliability.

With the vigorous development of the national power grid, there are more and more high-voltage lines, and the spanning of new lines is becoming more and more complicated. The power outage construction carried out across the line will greatly affect the reliability of power supply, and will also bring heavy losses to users.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a simple structure, reliable use, can save a lot of time and cost, high construction efficiency and good safety London Tower Bridge type transmission line non-stop across the system and span method.

In order to achieve the above object, the present invention adopts the following technical solutions: a London Tower Bridge type power transmission line spanning system without power failure, which is mainly composed of a spanning frame on one side of the spanned line and a hydraulic lifting pole on the other side. It is characterized in that the middle part of the spanning tower is hinged with a pair of aluminum alloy holding poles that can swing up and down through an auxiliary cross arm, and multiple rows of wire support poles are installed on the aluminum alloy holding poles to form a bridge facing the side of the spanned line. Horizontal combined wire support frame;

The middle part of the ground hydraulic lifting pole is also hinged with a pair of aluminum alloy poles that can swing up and down through an auxiliary cross arm. Multiple rows of wire support poles are installed on the aluminum alloy poles and form a direction towards the crossed line. Combined wire support frame placed horizontally on the side;

Between the combined wire support racks on both sides of the crossed line, the wire after being deployed is installed through the traction of the guide rope.

As a preference: the front end of the combined wire support frame on the spanning tower is reversely fixedly connected to the ground on the other side through a suspension wire through a pulley installed on the upper end of a lifting pole, and the two sides of the combined wire support frame The sides are respectively fixed on the upper end of the spanning tower by a wave and wind rope;

The front end of the combined wire support frame on the ground hydraulic lifting pole is also reversely fixedly connected to the ground on the other side through a suspension wire through a pulley installed on the upper end of the ground hydraulic lifting pole, and on the combined wire support frame. The two sides are respectively fixed to the upper part of the ground hydraulic lifting pole through a stable wave and wind rope.

A method for crossing a power transmission line without a power failure using the London Tower Bridge type power transmission line crossing system without a power failure. After passing the pulley at the top of the front end of the combined wire support frame, connect the gravity sandbag, and after the combined wire support frame on both sides slowly falls from top to bottom, the gravity sandbags connected by the guide rope on the combined wire support frame on both sides slide to the ground , and then manually untie the gravity sandbags, connect the guide ropes on both sides as a whole, tighten and lift the guide ropes from at least one side, and complete the deployment of the guide ropes; after the guide ropes are deployed, use The tail end of the guide rope pulls the conductor through the suspended horizontal combined wire support frame to complete the conductor deployment.

As a preference: the combined wire support frame is assembled on the ground first, and then vertically lifted by a small pole or other lifting mechanism, when the combined wire support frame is at least raised to the middle position of the hydraulic lifting pole spanning the tower and the ground seat , use two wave and wind ropes to fix the connection and stabilize the combined wire support frame to prevent it from swinging left and right; The auxiliary cross arm on the pole is hinged; after the combined wire support racks on both sides slowly fall down and lie flat, the gravity sandbags connected to each end will slide down to the ground accordingly.

In the past, during wire erection construction, it was generally required that the two circuits of 220kV lines were cut off at the same time, and the power transmission was resumed after the wire erection was completed; since the two circuits sent power to the same substation, a simultaneous power failure would have a great impact on the reliable power supply of one side of the substation. Influence; in order to avoid simultaneous power outages of the two spanned lines during the wiring construction, the present invention considers setting spanning towers near the 220kV line respectively, and suspending the form of the combined support line frame on the spanning towers to realize zero power failure in the whole process The network is sealed across the wire; the invention has the characteristics of simple structure, reliable use, can save a lot of time and cost, high construction efficiency and good safety.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the front structure of the spanning tower according to the present invention.

Fig. 3 is a schematic diagram of crossing without interruption of power transmission line according to the present invention.

detailed description

The present invention will be described in detail below in conjunction with accompanying drawing: As shown in Fig. 1, a kind of London Tower Bridge type power transmission line of the present invention is crossed without interruption system, and it is mainly by being positioned at crossing tower 1 and spanning one side of crossed line The other side is composed of a hydraulic lifting pole 2, and the middle part of the spanning tower 1 is hinged to a pair of aluminum alloy poles 4 that can swing up and down through an auxiliary cross arm 3. Arrange the wire support rods 5 and form a combined wire support rack 7 that is placed horizontally towards the side of the crossed line 6, as shown in Figure 2;

The middle part of the ground hydraulic lifting holding pole 2 of the present invention is also hinged with a pair of aluminum alloy holding poles 4 that can swing up and down through an auxiliary cross arm 3, and multiple rows of wire support poles 5 are installed on the aluminum alloy holding poles 4. A combined wire support frame 7 that is horizontally placed towards the side of the crossed line 6 is formed; that is, the structures of the combined wire support frames 7 on the left and right sides described in this embodiment are the same.

Between the combined wire holders 7 on both sides of the crossed line 6, the wires after deployment are installed through the traction of the guide rope 8.

As shown in the figure, the front end of the combined wire support frame 7 spanning the tower 1 of the present invention is reversely and fixedly connected to the ground on the other side through a suspension wire 9 after being installed on a pulley at the upper end of a lifting pole 10. And on both sides of the combined wire support frame 7, they are respectively fixed on the upper end of the spanning tower 1 by a wave and wind rope 11;

The front end of the combined wire support frame 7 on the ground hydraulic lifting pole 2 is also reversely fixedly connected to the ground on the other side through a suspension wire 9 after passing through the pulley at the upper end of the ground hydraulic lifting pole 2. Both sides of the wire support frame 7 are respectively fixed on the upper part of the seat hydraulically lifting the pole 2 by a stable wave and wind rope 11.

As shown in Fig. 3, a method for crossing a power transmission line without a power failure using the Tower Bridge type power transmission line crossing system without a power failure, the method is: a pulley is arranged at the front end of the combined support frame 7 on both sides of the crossed line 6 After bypassing the pulley at the front end of the combination wire support frame 7 with the guide rope 8, a gravity sandbag 12 is connected, and after the combination wire support frame 7 on both sides falls slowly from top to bottom, the combination wire support frame 7 on both sides The gravity sandbag 12 connected by the guide rope 8 slides to the ground, and then the gravity sandbag 12 is untied manually, and after the guide rope 8 on both sides is connected as one, tighten and lift the guide rope 8 at least from one side. , to complete the deployment of the guide rope; after the deployment of the guide rope 8, use the tail end of the guide rope 8 to pull the wire through the suspended and flat combined wire support frame 7 to complete the deployment of the wire, as shown in Figure 1.

The combined wire support frame 7 described in the present invention is firstly assembled on the ground, and then vertically lifted by a small pole or other lifting mechanism. In the middle position, use two waves and wind ropes 11 to connect and stabilize the combined wire support frame 7 to prevent it from swinging left and right; The auxiliary cross-arm 3 on the tower 1 or the ground-seat hydraulic lifting pole 2 is hinged; after the combined support frame 7 on both sides slowly falls down and is placed flat, the gravity sandbags 12 connected to the respective ends will slide down to the ground.

Embodiment: The present invention utilizes an aluminum alloy pole to be suspended on a spanning tower (or a temporary self-supporting tower erected nearby) close to the spanned line, and then falls to form a combined wire support frame.

As shown in Figures 1 and 2, the London Tower Bridge spanning frame is composed of a pair of aluminum alloy poles with multiple rows of wire support frames. The combined wire support frames are assembled on the ground and lifted by small poles. A pulley is set on the top of the wire support frame, and a pull rope is used to bypass the top block of the frame to connect the gravity sandbag. When the wire support frame rises to the top frame of the ground wire, use 2 waves and wind ropes to stabilize the bracket from swinging left and right. When the wire support frame rises to the temporary auxiliary cross arm, the bottom is hinged with the temporary auxiliary cross arm on the tower. Since the other base spanning tower is far away from the spanned line, it cannot be directly used as a suspension wire rack. Therefore, it is considered to use ground-mounted hydraulic lifting poles to replace the spanning tower suspension wire support on the outside of the other crossed line. A pulley is also set on the top of the wire support frame, and a pull rope is used to bypass the top block of the frame to connect the gravity sandbag. After the wire support racks on both sides slowly fall down, slide the gravity sandbags on both sides to the ground, then untie the gravity sandbags manually, connect the guide ropes on both sides as a whole, tighten and lift the guide ropes, and complete The guide rope is deployed. After the guide rope is deployed, use the tail end of the guide rope to pull the wire through the suspended wire holder to complete the wire deployment.

Since the other base spanning tower is far away from the spanned line, it cannot be directly used as a suspension wire rack. Therefore, it is considered to use ground-mounted hydraulic lifting poles to replace the spanning tower suspension wire support frame on the outside of the line being spanned in another round. A pulley is also set on the top of the wire support frame, and the gravity sandbag is connected to the pulley on the top of the frame with a traction rope. After the wire support racks on both sides slowly fall down, slide the gravity sandbags on both sides to the ground, then untie the gravity sandbags manually, connect the guide ropes on both sides as a whole, tighten and lift the guide ropes, and complete The guide rope is deployed. After the guide rope is deployed, use the tail end of the guide rope to pull the wire through the suspended wire holder to complete the wire deployment.

The invention adopts the London Tower Bridge type non-stop spanning system to spread out the wires, makes full use of the spanning tower and the existing construction equipment for stringing, saves a lot of time and cost for setting up conventional spanning frames and grid sealing frames, and can be completely recycled after the stringing is completed Spanning equipment, improving the construction efficiency of crossing live lines by about 20%.

Claims (4)

1. a kind of Tower of London bridge-type transmission line of electricity does not have a power failure leap system, it mainly by being located at by the crossing frame of cross-line road side and Opposite side seat ground hydraulic pressure lift pole composition is it is characterised in that the described middle part crossing over pylon is hinged with one by an auxiliary cross-arm The aluminium alloy pole that pair can swing up and down, is provided with many evacuating pus and expelling toxin line bar on this aluminium alloy pole and forms one towards by cross-line road The combination line supporting rack of side horizontal；

The middle part of described seat ground hydraulic pressure lift pole is hinged with, also by an auxiliary cross-arm, the aluminum alloy holding that a pair can swing up and down Bar, is provided with many evacuating pus and expelling toxin line bar on this aluminium alloy pole and forms one towards by the combination line supporting rack of cross-line road side horizontal；

By the traction of guide rope between the combination line supporting rack by cross-line road both sides, the wire after unfolding is installed.

2. Tower of London bridge-type transmission line of electricity according to claim 1 does not have a power failure leap system it is characterised in that described leap Combination line supporting rack front end on pylon is reversely fixed after being arranged on a lifting pole upper end pulley by messenger wire together It is connected on the ground of opposite side, and respectively leap pylon upper end is fixed on by a unrestrained wind rope in the both sides of combination line supporting rack Portion；

Combination line supporting rack front end on described seat ground hydraulic pressure lift pole carries through installing present ground hydraulic pressure also by messenger wire together Reversely it is fixedly connected on the ground of opposite side after rising pole upper end pulley, and pass through one respectively in the both sides of combination line supporting rack Root stable wave wind rope fixing present ground hydraulic pressure lift pole epimere portion.

3. a kind of carry out transmission line of electricity using the leap system that do not have a power failure of the Tower of London bridge-type transmission line of electricity described in claim 1 or 2 Do not have a power failure crossing construction method it is characterised in that the method is：Arrange in the combination line supporting rack leading section by cross-line road both sides Have coaster, with guide rope bypass combination line supporting rack leading section top coaster after, connect gravity sandbag, both sides combination line supporting rack from On slowly fall downwards after, the gravity sandbag landing that connected by guide rope is combined on line supporting rack to ground in both sides, then by manually Gravity sandbag is untied, and after the guide rope of both sides is connected as one, at least tightens up from side and lifts guide rope, complete guide rope Unfolding；After guide rope unfolding, then complete wire exhibition with guide rope tail end traction wire by suspending the combination line supporting rack of horizontal in midair Put.

4. Tower of London bridge-type transmission line of electricity according to claim 3 do not have a power failure leap system carry out transmission line of electricity do not have a power failure across The method more constructed is it is characterised in that described combination line supporting rack elder generation is completed on ground, then by little pole or other Loop wheel machine structure carries out vertical lifting, when combining line supporting rack with least rising to leap pylon and seat hydraulic pressure lift pole medium position, It is fixedly connected with two unrestrained wind ropes and stably combine line supporting rack to prevent from swinging around；When combination line supporting rack rises to auxiliary cross-arm During place, the bottom of combination line supporting rack is hinged with the auxiliary cross-arm crossed on pylon or seat ground hydraulic pressure lift pole；Treat that both sides are combined Line supporting rack slowly fall and horizontal after, the gravity sandbag that connects under respective end will therewith landing to ground.