CN211007886U

CN211007886U - I cluster and V cluster interchangeable cross arm structure

Info

Publication number: CN211007886U
Application number: CN201920996885.3U
Authority: CN
Inventors: 何海勇; 梁运兴; 林国晖; 田耕
Original assignee: Qingyuan Electric Power Planning And Design Institute Co ltd
Current assignee: Qingyuan Electric Power Planning And Design Institute Co ltd
Priority date: 2018-09-17
Filing date: 2019-06-28
Publication date: 2020-07-14
Anticipated expiration: 2029-06-28

Abstract

The utility model belongs to the technical field of power grids, and discloses a cross arm structure with interchangeable I strings and V strings, which comprises a tower body; the tower body is detachably connected with an I-shaped string short cross arm or a V-shaped string long cross arm; the I string short cross arm or the V string long cross arm is connected to the tower body through the flange unit. An object of the utility model is to provide a I cluster and V cluster interchangeable cross arm structure, this structure can effectual reduction engineering construction cost to do benefit to the design that the building and natural environment carried out the synthesis around the construction ground of abundant combination.

Description

I cluster and V cluster interchangeable cross arm structure

Technical Field

The utility model relates to a power grid technical field, especially a I cluster and V cluster interchangeable cross arm structure.

Background

The cross arm is an important component in a tower and is used for installing insulators and hardware fittings so as to support a conducting wire and a lightning conductor and keep a certain safety distance according to regulations.

CN 201020691429.7 discloses a tangent tower for power transmission line, which can further reduce cost, and includes a tower head and at least one group of cross arm groups arranged in sequence from the top of the tower head downwards, each group of cross arm group is composed of three layers of cross arms, namely an upper layer cross arm, a middle layer cross arm and a lower layer cross arm, insulator strings of the upper layer cross arm and the lower layer cross arm adopt an "I" string-hanging wire mode, and insulator strings of the middle layer cross arm adopt a "V" string-hanging wire mode, which is referred to as "IVI" arrangement for short. The adoption of the tangent tower arranged in the IVI is beneficial to reducing the width of a line corridor of the tangent tower and reducing the weight of the tower, is suitable for areas with dense houses, can reduce the removal and reduce the influence of a power transmission line on the ecological environment.

However, although the above-mentioned technologies have some effects in reducing the engineering construction cost and the occupied space as much as possible, the overhead transmission line in the past often has a problem that, because of shortage of urban land, some other urban infrastructure is often added beside the line in the I-string, and after the infrastructure is added, the requirement of the line operation safety protection distance is not met. Because the I-string wind is larger, the width required by a line corridor is larger, in order to solve the situation, the traditional solution is to integrally disassemble the I-string line steel pipe rod and replace the I-string line steel pipe rod with the V-string steel pipe rod which is smaller in wind and has narrow requirement on the line corridor, the whole replacement cost is high, and the disassembled whole steel pipe rod needs to be processed according to scrap steel, so that the cost is very high.

CN201020253909.5 discloses overhead transmission line tangent tower, it discloses an overhead transmission line tangent tower, including the body of the tower, fixed mounting has more than one wire cross arm, its characterized in that on the body of the tower: each wire cross arm is provided with two groups of wire hanging mechanisms; each group of wire hanging mechanisms is two, the two wire hanging mechanisms are positioned on the same side of the tower body, one of the two wire hanging mechanisms is an external wire hanging mechanism, and the other one is an internal wire hanging mechanism. The change of I string and V string is realized mainly through the transformation of the wire hanging mechanism.

The technical problem that this application will solve is: when the surrounding building changes and the natural environment changes, how to realize the interchange of the I string and the V string. This is a technical problem that the above-mentioned technique does not solve.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a I cluster and V cluster interchangeable cross arm structure, this structure can effectual reduction engineering construction cost to do benefit to the design that the building and natural environment carried out synthesis around the construction ground of abundant combination.

The specific scheme is as follows: a cross arm structure with interchangeable I strings and V strings comprises a tower body; the tower body is detachably connected with an I-shaped string short cross arm or a V-shaped string long cross arm; the I string short cross arm or the V string long cross arm is connected to the tower body through the flange unit.

In the above cross arm structure with interchangeable I-string and V-string, the flange unit includes a connecting flange and a flange stiffener disposed between the connecting flange and the I-string short cross arm or the V-string long cross arm.

In the above cross arm structure with interchangeable I-string and V-string, the long cross arm of the V-string is provided with a construction stiffening rib at the position close to the flange unit.

In the above cross arm structure with interchangeable I-string and V-string, two ends of the long cross arm of the V-string are respectively provided with an inner hanging point and an outer hanging point.

In the cross arm structure with the interchangeable I strings and V strings, pedals are arranged between the tower body and the connecting flange, and anti-skidding parts are arranged on the pedals.

The beneficial effects of the utility model reside in that:

the I cluster V cluster intermodulation facility system that the steel-pipe pole design adopted adopts this kind of intermodulation facility, can tear former I cluster cross arm down under the condition of not changing steel-pipe pole mobile jib and flange, and direct change is the subsidiary novel V cluster cross arm of this facility, can carry out the overhead line installation. The requirement of the specification on the safety protection distance of the line can be met, and the facility is safe and reliable, convenient to install, short in construction period, short in power failure time, attractive in appearance and remarkable in economic benefit; through measurement and calculation, the cost for dismantling, processing and installing the steel pipe pole is considered, the cost for moving and modifying the I-string and V-string intermodulation facility system is only 20% of the cost of the traditional moving and modifying method, the economic benefit is very obvious after the condition of small economic loss caused by short power failure time is considered, and the facility system is very worthy of being used in urban line engineering.

The flange unit of the scheme is a special structural flange facility which can be used for connecting I-shaped string short cross arms and novel V-shaped string long cross arms. I cluster short cross arm, novel V cluster long cross arm are the cross arm that satisfies tower head planning design under the circuit service condition, novel V cluster long cross arm adopt in string point department with V cluster string in the past string point completely different string method, hang in the V cluster in the past a point and hang on steel pipe pole mobile jib shaft, and this time novel V cluster long cross arm will hang the point in with and shift to the root diameter department of V cluster long cross arm, avoid root diameter department flange stiffening rib and increase the structure stiffening rib. The convenience of I string and V string intermodulation facility replacement is effectively solved.

Drawings

Fig. 1 is a front view of a cross arm structure for mounting an I-string short cross arm of embodiment 1;

FIG. 2 is a front view of a cross arm structure for mounting a V-string long cross arm of embodiment 1;

fig. 3 is a front view of the flange unit of embodiment 1;

FIG. 4 is a top view of the cross arm of embodiment 1;

fig. 5 is a partial plan view of the cross arm structure to which the I-string short cross arm is attached in embodiment 1.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following detailed description, but the present invention is not limited thereto.

In order to more clearly explain the present invention, the following examples are given to illustrate the advantages of the present invention.

Example 1

As shown in fig. 1-5, a cross arm structure with interchangeable I-string and V-string comprises a tower body 1; the tower body 1 is detachably connected with an I-shaped string short cross arm 2 or a V-shaped string long cross arm 3; the I-shaped string short cross arm 2 or the V-shaped string long cross arm 3 is connected to the tower body 1 through a flange unit.

Generally, in the process of construction, under the condition that the transverse space is enough, the I string is considered firstly, because the I string has the advantages of simple structure, convenient construction and operation, and the cross arm for mounting the I string is shorter than the cross arm for mounting the V string, so the I string is the first consideration.

In practical application, if a new building is built near a tower based on the design principle of the embodiment or other situations occur, the I-string cannot adapt to a new practical environment, and needs to be replaced by a V-string with a narrower corridor width.

At this time, the nuts on the flange units are removed, and the I-string short cross arm 2 can be removed and the V-string long cross arm 3 can be installed.

In the present embodiment, the flange unit includes a connection flange 4 and a flange stiffener 5 disposed between the connection flange 4 and the I-string short cross arm 2 or the V-string long cross arm 3.

In both the I-string short cross arm 2 and the V-string long cross arm 3, the cross section perpendicular to the axial direction of the main structure is a regular hexagon, and in terms of the installation skill of the flange stiffener 5, the flange stiffener 5 is generally installed at each corner of the regular hexagon and at the midpoint of each side of the regular hexagon, except that the height of the flange stiffener 5 installed at each corner of the regular hexagon is slightly lower than that of the flange stiffener 5 at the midpoint of each side of the hexagon.

Preferably, the V-string long cross arm 3 is provided with a construction stiffening rib 7 at a position close to the flange unit. The stiffening ribs 7 are constructed to increase the support strength of the inner hanging point 8.

In this embodiment, the two ends of the V-string long cross arm 3 are respectively provided with an inner hanging point 8 and an outer hanging point 9. Traditional V cluster long cross arm 3 sets up interior string point 8 on shaft tower body 1, and in this embodiment, in order to optimize and dismantle convenience and reduce construction cost, shift interior string point 8 to the root diameter department of V cluster long cross arm 3, avoid root diameter department flange stiffening rib 5 and increase structure stiffening rib 7.

The hanging points on the I-string short cross arm 2 are the same as those of the traditional I-string short cross arm.

Preferably, as shown in fig. 4, a partial top view of a tower body 1 provided with an I-string short cross arm 2 is provided, a foot rest 10 is provided between the tower body 1 and the connecting flange 4, and the foot rest 10 is provided with an anti-skid part 6.

The above description is only for the preferred embodiment of the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cross arm structure with interchangeable I strings and V strings comprises a tower body; the tower is characterized in that the tower body is detachably connected with an I-string short cross arm or a V-string long cross arm; the I string short cross arm or the V string long cross arm is connected to the tower body through the flange unit.

2. The cross-arm structure of claim 1, wherein the flange unit comprises a connecting flange and a flange stiffener disposed between the connecting flange and the I-string short cross-arm or the V-string long cross-arm.

3. The I-string and V-string interchangeable cross arm structure of claim 1 wherein said V-string long cross arm is provided with structural stiffeners near the flange units.

4. The cross arm structure with interchangeable I-string and V-string as claimed in claim 1, wherein the two ends of the long cross arm of V-string are respectively provided with an inner hanging point and an outer hanging point.

5. The cross arm structure with the interchangeable I-shaped strings and the interchangeable V-shaped strings as claimed in claim 2, wherein pedals are arranged between the tower body and the connecting flange, and anti-skid parts are arranged on the pedals.