CN112448350A

CN112448350A - Drilling and crossing tower capable of preventing wire jumping and wind deflection

Info

Publication number: CN112448350A
Application number: CN202011330683.9A
Authority: CN
Inventors: 陈晨; 张亮; 樊庆玲; 唐亚可; 牛凯; 裴浩威; 张清峰; 郭伟; 魏荣生; 王玉杰; 陈军帅
Original assignee: Henan Dingli Pole Tower Co ltd; State Grid Corp of China SGCC; Economic and Technological Research Institute of State Grid Henan Electric Power Co Ltd
Current assignee: Henan Dingli Pole Tower Co ltd; State Grid Corp of China SGCC; Economic and Technological Research Institute of State Grid Henan Electric Power Co Ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-05
Anticipated expiration: 2040-11-24
Also published as: CN112448350B

Abstract

The invention discloses a drilling and crossing tower capable of preventing wire jump wind deflection, which comprises a tower body and a tower head, wherein the tower head is positioned above the tower body; the tower comprises a tower body, a tower head, a tower body, a ground wire cross arm, a first cross arm and a second cross arm are horizontally arranged in the direction from the tower head to the tower body respectively, jumper racks are arranged on two sides of the second cross arm, a plurality of obliquely arranged insulator strings and a plurality of horizontally arranged heavy hammers are arranged on the jumper racks, two ends of each insulator string are fixed to the top and the bottom of each jumper rack respectively, and the plurality of horizontally arranged heavy hammers are fixed to the bottom of each jumper rack. The whole tower height is also reduced multiple when improving the wire jumper windage yaw, the cost is reduced, monolithic weight provides convenient when the staff goes up the tower and dismantles the weight in addition, has reduced the potential safety hazard.

Description

Drilling and crossing tower capable of preventing wire jumping and wind deflection

Technical Field

The invention relates to the technical field of fixed heavy hammer structures of high-voltage overhead transmission lines, in particular to a drilling tower capable of preventing wire-jumping wind deflection.

Background

The higher the altitude, the smaller the air density and absolute humidity, so that the discharge voltage of the suspension insulator string and the air gap of the power transmission line is reduced. In order to ensure the safe operation of the overhead transmission line in the high-altitude area, the swing angle of the suspension insulator string must be ensured to be within an allowable value. For the design of lines in heavy ice regions, the method of increasing the height of an iron tower and the like is often adopted in the design to avoid using a heavy hammer to limit the overlarge swing angle of the suspension insulator string as much as possible, but some lines are limited by terrain, the method of increasing the height of the iron tower and the like is not ideal and has large investment, and the heavy hammer is considered instead. CN204243690U discloses a fixed weight structure for high voltage overhead transmission line, which is characterized in that a plurality of weight pieces are fastened on a yoke plate and installed on the high voltage overhead transmission line between a suspension insulator string and a suspension clamp. CN111725762A discloses a stacked combined weight piece and its manufacturing method, but the stacked weight piece will increase the total height of the tower and has limited effect of preventing wire-jump windage yaw.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks, the present invention provides a skip tower capable of preventing a jumper wind-offset, so as to reduce the total height of the tower body and reduce the jumper wind-offset.

In order to achieve the purpose, the invention adopts the following technical scheme:

the drilling and crossing tower capable of preventing wire jump wind deflection comprises a tower body and a tower head, wherein the tower head is positioned above the tower body; the tower comprises a tower body, a tower head, a tower body, a ground wire cross arm, a first cross arm and a second cross arm are horizontally arranged in the direction from the tower head to the tower body respectively, jumper racks are arranged on two sides of the second cross arm, a plurality of obliquely arranged insulator strings and a plurality of horizontally arranged heavy hammers are arranged on the jumper racks, two ends of each insulator string are fixed to the top and the bottom of each jumper rack respectively, and the plurality of horizontally arranged heavy hammers are fixed to the bottom of each jumper rack.

Optionally, the jumper rack comprises a tower head jumper rack and a hard jumper rack, the tower head jumper rack is located above the hard jumper rack, one end of the insulator string is connected with the tower head jumper rack, and the other end of the insulator string is connected with the hard jumper rack; the heavy hammer is connected with the hard jumper rack through a bolt and is positioned at the bottom of the hard jumper rack.

Optionally, the shape of the weight is a rectangular plate, and the weight is made of cast iron and has a specification of 400mm by 600mm by 30 mm.

Optionally, the number of the heavy hammers is four.

Optionally, the angle between adjacent insulator strings is between 30 ° and 50 °.

On the governed and newly-built transmission line, the composite insulator is widely applied, but because the insulator string is light in weight, in order to prevent the dangerous situations that the insulator string is pulled up and falls off, the wire is grounded, short circuit and broken wire are caused by the large-amplitude galloping and swinging of the wire and the jumper wire under the action of strong wind, ice coating and various stresses, a heavy-hanging hammer device needs to be installed on part of strain-resistant linear towers, various external force influences on the wire are balanced and eliminated through the falling force of dead weight load of the heavy-hanging hammer device, and the safety distance between the wire and the tower, the stay wire, the spanning object, the adjacent phase ground wire and the like is ensured. Therefore, a suspension string and a suspension weight device are required to be mounted on a suspension string of a parallel lead carried by a jumper wire of a tension-resistant tower, a corner, a double-loop tower, a branch tower and a phase-change tower, which have large sag and are wound or jumped or positioned at the outer corner side of the corner and a linear tower positioned at an air port of a wind area, so as to prevent the insulator string from being pulled upwards and inhibit the swing angle of the lead from being too large. However, due to the unreasonable structure and connection mode of the suspended heavy hammer, the thickness of the heavy hammer is too large, the distance between the electric conductors is ensured, and the tower height needs to be increased; the operation process is complex, the working efficiency is low, and the time consumption is long; personnel danger and physical exertion are great: the position is frequently transferred on a tower, and a shoulder-carried heavy hammer suspension device is carried out by hands; the device has potential safety hazards in operation; windage yaw prevention effect is limited.

The invention has the following positive beneficial effects:

with insulator chain slope setting, be fixed with the multi-disc weight that the level set up bottom the jumper wire frame of fixed insulator chain, the height and the weight height of insulator chain have been reduced to increase weight, reduce the windage, reduce vertical cross-sectional area, reduce the windage, still multiple holistic tower height has been reduced when improving the jumper wire windage yaw, the cost is reduced, monolithic weight provides convenient when staff goes up the tower and dismantles the weight in addition, potential safety hazard is reduced.

Drawings

Fig. 1 is a schematic front view of a drilling tower for preventing wire jump wind deviation according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of an exemplary weight according to embodiment 1 of the present invention;

fig. 3 is a schematic structural diagram of the side view in the direction B of fig. 1 according to embodiment 1 of the present invention.

Detailed Description

The invention will be further illustrated with reference to some specific embodiments.

Example 1

As shown in fig. 1 to 3, the invention discloses a skip line wind deflection preventing drilling and crossing tower, which comprises a tower body and a tower head, wherein the tower head is positioned above the tower body; the ground wire cross arm 10, the first cross arm 20 and the second cross arm 30 are horizontally arranged along the direction from the tower head to the tower body, jumper racks 40 are arranged on two sides of the second cross arm 30, a plurality of obliquely arranged insulator strings 50 and a plurality of horizontally arranged heavy hammers 60 are arranged on the jumper racks 40, two ends of each insulator string 50 are fixed with the top and the bottom of the jumper rack 40 respectively, and a plurality of horizontally arranged heavy hammers 60 are fixed at the bottom of the jumper rack 40.

Referring to fig. 2, which is a schematic view of an exemplary stacked weight 60, the length of the jumper string is generally 2.5m, the weight 60 is stacked on the weight 60 seat and hung below the shoulder pole by parallel hanging plates, so that the charged body is invisibly increased, the height of the tower to be drilled and crossed is correspondingly increased and the cost is increased due to the fact that the charged body needs to keep a certain distance, and the vertical cross section of the weight 60 is large, the wind resistance is correspondingly increased, and the wire jump preventing windage yaw effect is limited. According to the invention, the insulator string 50 is obliquely arranged, and the plurality of weights 60 which are horizontally arranged are fixed at the bottom of the jumper wire rack 40 for fixing the insulator string 50, so that the weight is increased, the wind resistance is reduced, the integral tower height is reduced while the wind deflection resistance of the jumper wire is improved, the cost is reduced, and the single weight 60 is convenient and fast to mount and dismount the weight 60 on the tower by workers.

Specifically, referring to fig. 3, the jumper rack 40 includes a tower head jumper rack 41 and a hard jumper rack 42, the tower head jumper rack 41 is located above the hard jumper rack 42, one end of the insulator string 50 is connected to the tower head jumper rack 41, and the other end is connected to the hard jumper rack 42; the weight 60 is connected to the hard jumper rack 42 by a bolt and is located at the bottom of the hard jumper rack 42. The ground wire cross arm 10 is provided with ground wire suspension points and the first cross arm 20 and the second cross arm 30 are provided with a plurality of wire suspension points, respectively. The insulator adopts a tension insulator and is connected with the leads on the two sides of the tower pole through a jumper string. The included angle between adjacent jumper insulator strings 50 is between 30 ° and 50 °. The weight 60 is four, is in the shape of a rectangular flat plate, is made of cast iron, has the specification of 400mm 600mm 30mm, and can be selected from weights 60 with different specifications as required. Compared with the height of the jumper string shown in FIG. 2, which is reduced by 300mm, the weight 60 disposed on the bottom horizontal single layer can be reduced by 150mm, that is, by 450 mm. Effectively control and bore tower overall height more, reduce wire jumper windage yaw.

Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. The drilling and crossing tower capable of preventing wire jump wind deflection is characterized by comprising a tower body and a tower head, wherein the tower head is positioned above the tower body; the tower comprises a tower body, a tower head, a tower body, a ground wire cross arm, a first cross arm and a second cross arm are horizontally arranged in the direction from the tower head to the tower body respectively, jumper racks are arranged on two sides of the second cross arm, a plurality of obliquely arranged insulator strings and a plurality of horizontally arranged heavy hammers are arranged on the jumper racks, two ends of each insulator string are fixed to the top and the bottom of each jumper rack respectively, and the plurality of horizontally arranged heavy hammers are fixed to the bottom of each jumper rack.

2. The wire jump wind deflection preventing drilling tower of claim 1, wherein the jumper frame comprises a tower head jumper frame and a hard jumper frame, the tower head jumper frame is positioned above the hard jumper frame, one end of the insulator string is connected with the tower head jumper frame, and the other end of the insulator string is connected with the hard jumper frame; the heavy hammer is connected with the hard jumper rack through a bolt and is positioned at the bottom of the hard jumper rack.

3. The tower of claim 2, wherein the weight is a rectangular plate made of cast iron and has a size of 400mm by 600mm by 30 mm.

4. The tower of claim 1, wherein the number of the weight is four.

5. The jump wire wind bias prevention drill tower of claim 1 wherein the included angle between adjacent insulator strings is between 30 ° and 50 °.