CN110453959A - A dual-circuit drill-through steel pipe pole and power transmission system - Google Patents

Abstract

It is bored present disclose provides a kind of double loop and gets over steel pipe pole and transmission system, including shaft, ground wire cross-arm, upper layer cross-arm and lower layer's cross-arm are successively arranged in parallel on the shaft from top to bottom, wherein the horizontally disposed middle layer conductor for having conventional double loop steel pipe pole and lower layer conductor on lower layer's cross-arm；The non-brill of the upper layer cross-arm gets over shelves side and lays topping wire, bores and gets over the horizontally disposed ground wire in shelves side and topping wire；The non-brill of the ground wire cross-arm gets over shelves side and is laid with ground wire, bores more shelves side and is not provided with ground wire；Each layer conductor is directly connected by wire jumper; ground wire is connected through ground wire lead; layer conductor cross-arm, lengthening the upper and lower conducting wire cross-arm in only cancelling on conventional double loop steel pipe pole; conducting wire is changed into triangular arrangement by original being arranged vertically; brill gets over shelves and ground wire is arranged in topping wire cross-arm; can reduce bore get over shelves route height and ground wire (OPGW optical cable) it is continuous, bore more shelves conducting wire lightning protection by be drilled route provide protection.

Description

A dual-circuit drill-through steel pipe pole and power transmission system

technical field

The disclosure belongs to the technical field of high-voltage overhead transmission line construction, and relates to a double-circuit drill-through steel pipe pole and a power transmission system.

Background technique

The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

With the rapid development of the economy, the scale and density of overhead transmission lines are constantly expanding. In the process of power grid construction, it is often necessary to drill through the existing overhead lines. The first-grade line that drills through the existing overhead lines is called Drilling over the gear, the pole tower at the two ends of the drilling over the gear is called the drilling over the tower (rod). When designing the overrun, the newly built overrun must meet the following three conditions: first, to meet the safety distance between the overrun and the existing overhead line; second, to meet the safety distance between the overrun and the ground; The distance requirements between the phases of the gear conductors and between the phases and between the relative towers.

In order to save land resources, high-voltage transmission lines are often erected with double-circuits on the same pole. When the existing overhead lines are relatively high, conventional double-circuit poles on the same pole can be directly used for drilling. When the height of the existing overhead line is low, it is not possible to directly use the conventional double-return pole type on the same pole for drilling. At this time, there are generally three implementation methods. One is to build a new double-circuit cable terminal pole on both sides of the existing overhead line. , using cable drilling; the second is to transform and raise the existing overhead line, and then adopt the conventional double-return rod type drilling; the third is to build new drilling rods on both sides of the existing overhead line, and reduce the height of the new overhead line Drill back.

For the first method, due to the use of cables, the project cost will increase. In addition, an overhead plus cable composite power network is formed, which not only increases the difficulty and cost of power grid operation and maintenance, but also reduces the reliability of power grid operation. For the second method, it is necessary to carry out power outage reconstruction on the existing overhead lines, which will not only increase the project cost and construction difficulty, but also increase certain operational risks due to changes in the operation mode of the power grid. For the third method, there are four related Chinese patent applications published at present, among which the patent application CN204850643U discloses a triple drilling through steel pipe rod, which includes 3 vertical rods and 2 layers of cross arms. The ground wire is fixed to the upper cross arm, and the wire is fixed to the lower cross arm. The two wires are arranged horizontally, which greatly reduces the height of the tower head and facilitates drilling. However, this type of over-drilling rod has a large weight and occupies a large area, which will increase the construction cost, and the width of the over-drilling line corridor is relatively wide, which is not conducive to saving land resources. Patent application CN204497701U discloses a single-circuit penetrating over-drilling rod for power transmission lines in various voltage levels. The rod includes 2 vertical rods and 2 layers of cross arms. The ground wire is fixed on the upper cross arm, and the wire is fixed on the lower cross arm. The single-circuit wires are arranged horizontally, which greatly reduces the height of the tower head and facilitates drilling. However, when double-circuit lines are drilled with this rod, two new foundation drill rods need to be built on both sides of the existing overhead line, resulting in an increase in project cost. The width of the corridor will also increase, which is not conducive to saving land resources. Patent application CN203452435U discloses a double-circuit drilling span type steel pipe pole, which comprises 2 vertical poles, 5 layers of guide (ground) wire cross arms and 6 jumper wire cross arms. The spanning ground wire is fixed on the uppermost cross arm, the spanning wire is fixed on the 2nd and 3rd layer cross arms from top to bottom, the drilling and crossing wire is fixed on the 4th and 5th layer cross arm from top to bottom, and the spanning wire and The drill wires are connected to the jumper crossarm through jumper strings, and the two rounds of wires are arranged symmetrically on both sides of the two vertical bars in a triangular arrangement. The bar can simultaneously complete the two functions of line spanning and drilling over, but the bar has complex structure, heavy weight, high engineering cost, and no ground wire for drilling over. Patent application CN204663116U discloses a kind of 35kV double-circuit double-circuit asymmetrically arranged drill-through steel pipe rod on both sides, which includes a vertical rod and three layers of cross arms. The ground wire on the non-drilling side is fixed on the uppermost cross arm, the non-drilling side conductors are arranged in a triangle on the middle and lower cross arms, and the drilling side conductors are arranged horizontally on the lower cross arm. The pole can safely drill higher voltage level lines, but the pole is designed for 35kV voltage level. If the voltage level of the new line is increased, the lower cross-arm needs to be designed very long due to the distance between the conductors, and the structural design will become complicated; in addition The upper conductor on the non-drilling side of the rod needs to pass through the lead wire and the supporting insulator to connect with the conductor on the drilling side.

Contents of the invention

In order to solve the above problems, the present disclosure proposes a double-circuit drill-over steel pipe pole and power transmission system. The disclosure has a simple structure, light weight, and convenient wiring construction. It can ensure the continuity of the OPGW optical cable), the project cost is low, and after the implementation, it can ensure the reliable operation of the power grid and convenient operation and maintenance.

According to some embodiments, the present disclosure adopts the following technical solutions:

A double-circuit drilling steel pipe rod, including a shaft, on which a ground wire cross arm, an upper cross arm and a lower cross arm are arranged in parallel in sequence from top to bottom, wherein the lower cross arm is horizontally arranged with conventional The middle layer wire and the lower layer wire of the double-circuit steel pipe rod; the upper layer wire is laid on the non-drilling side of the upper cross-arm, and the ground wire and the upper layer wire are horizontally arranged on the drilling side; the non-drilling side of the ground wire cross-arm Ground wires are arranged, and no ground wires are set on the side of the drilling overhang; the wires of each layer are directly connected through the jumper wires, and the ground wires are connected through the ground wire leads, and the wires are arranged in a triangle on the upper cross arm and the lower cross arm.

As a possible implementation manner, the lower cross arm has an additional length relative to the lengths of the ground wire cross arm and the upper cross arm.

As a possible implementation manner, the length range of the upper cross arm is [2.5-5] meters.

As a possible implementation manner, the length of the lower cross arm is in the range of [4 meters to 7] meters.

As a possible implementation manner, the non-drilling side of the ground wire cross arm is provided with a ground wire fitting string.

As a possible implementation manner, wire insulator strings are provided at both ends of the upper cross arm.

As a possible implementation manner, the inner edge of the upper cross arm is provided with a ground wire fitting string on the inner edge of the side of the drill overhang.

As a possible implementation manner, several wire insulator strings are arranged on the lower cross arm.

As a possible implementation manner, the ground wire is arranged on a ground wire fitting string.

A power transmission system, comprising a plurality of double-circuit drilled-through steel pipe rods and conventional double-circuit steel pipe rods, the multiple double-circuit drilled-through steel pipe rods are arranged in the middle of the transmission line, and the conventional double-circuit steel pipe rods are arranged on the edge side of the transmission line .

Compared with the prior art, the beneficial effects of the present disclosure are:

The disclosed structure has the advantages of simple structure, light weight, convenient wiring construction, low engineering cost, reliable operation after implementation, and convenient operation and maintenance. Only on the conventional double-circuit steel pipe pole, the middle-level conductor cross-arm is canceled, the upper-level and lower-level conductor cross-arms are lengthened, the conductors are changed from the original vertical arrangement to a triangular arrangement, and the ground wire is arranged on the inner edge of the upper-level conductor cross-arm by drilling over the gear. It can reduce the height of the over-drilling line and ensure the continuity of the ground wire (OPGW optical cable). The lightning protection of the over-drilling wire is protected by the over-drilling line.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Figure 1 is a front view of the present invention.

Fig. 2 is a plan view taken along line II of Fig. 1 .

Fig. 3 is a side view along II-II direction of Fig. 1 .

FIG. 4 is a schematic diagram of the power transmission system of this embodiment.

Among them: 1. Shaft, 2. Ground cross arm, 3. Upper cross arm, 4. Lower cross arm, 5. Ground wire (OPGW), 6. Upper wire, 7. Middle wire, 8. Lower wire, 9 . Wire insulator string, 10. Wire jumper, 11. Ground wire fitting string, 12. Ground wire lead.

A, the double-circuit steel pipe rod of the present disclosure, B, the conventional steel pipe rod.

Detailed ways:

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

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

In this disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom" etc. refer to The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only a relative term determined for the convenience of describing the structural relationship between the components or elements of the present disclosure. Public restrictions.

In this disclosure, terms such as "fixed", "connected", and "connected" should be interpreted in a broad sense, which means that they can be fixedly connected, integrally connected or detachably connected; they can be connected directly or through an intermediate connection. The medium is indirectly connected. For relevant researchers or technicians in the field, the specific meanings of the above terms in the present disclosure can be determined according to specific situations, and should not be construed as limitations on the present disclosure.

The present disclosure provides a double-circuit over-drilling steel pipe rod. The steel pipe rod has a simple structure, light weight, and convenient wiring construction. The project cost is low, and after implementation, it can ensure reliable operation of the power grid and convenient operation and maintenance.

On the basis of conventional double-circuit steel pipe rods (conventional double-circuit steel pipe rods include shafts, ground wire crossarms, upper-layer wire crossarms, middle-layer wire crossarms, and lower-layer wire crossarms), the disclosure cancels the middle-layer wire crossarm; lengthens the lower layer Conductor cross arm, horizontally arrange the middle and lower conductors of conventional double-circuit steel pipe rods on the extended lower conductor cross arm; lengthen the upper conductor cross arm, and only arrange the upper conductor on the upper conductor cross arm on the non-drilling side , arrange the ground wire and the upper-layer wire horizontally on the upper-layer wire cross-arm on the over-drill side; the ground wire cross-arm is not modified, and the ground wire is arranged on the non-drill side. There is no ground wire for the cross arm. The wires of each layer are directly connected through the jumper wire, and the ground wire is connected through the ground wire lead.

The ground cross arm, the upper cross arm and the lower cross arm are arranged in parallel and are all perpendicular to the shaft. The ground cross arm, the upper cross arm and the lower cross arm may be symmetrical along the center of the shaft.

Non-drilling side: the ground wire (5) is arranged on the ground wire cross arm (2), the upper layer wire (6) is arranged outside the upper layer cross arm (3), the middle layer wire (7) and the lower layer wire (8) are arranged on the The outer side and the inner side of the lower floor cross arm (4).

Drilling over the gear side: the ground wire (5) and the upper layer wire (6) are arranged on the inside and outside of the upper layer cross arm (3), and the middle layer wire (7) and the lower layer wire (8) are arranged on the outside of the lower layer cross arm (4) and inside. On the drilled steel pipe pole of the present invention, the ground wire (5) is connected through the ground wire lead wire (12), and the wire is directly connected through the jumper wire (10).

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Although the specific implementation of the present disclosure has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present disclosure. Those skilled in the art should understand that on the basis of the technical solutions of the present disclosure, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present disclosure.

Claims (10)

1. a kind of double loop, which is bored, gets over steel pipe pole, it is characterized in that: including shaft, successively it is arranged in parallel with from top to bottom on the shaft Ground wire cross-arm, upper layer cross-arm and lower layer's cross-arm, wherein horizontally disposed on lower layer's cross-arm to have in conventional double loop steel pipe pole Layer conductor and lower layer conductor；The non-brill of the upper layer cross-arm get over shelves side lay topping wire, bore get over shelves side be horizontally disposed with ground wire and Topping wire；The non-brill of the ground wire cross-arm gets over shelves side and is laid with ground wire, bores more shelves side and is not provided with ground wire；Each layer conductor passes through jump Line is directly connected, and ground wire is connected through ground wire lead, and conducting wire is triangularly arranged on upper layer cross-arm and lower layer's cross-arm.

2. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: lower layer's cross-arm is relative to ground wire cross Load and the length of upper layer cross-arm have an additional length.

3. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: the length range of the upper layer cross-arm is [2.5~5] rice.

4. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: the length range of lower layer's cross-arm is [4~7] rice.

5. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: the two sides of the ground wire cross-arm are respectively provided with There is ground wire hardware tool string.

6. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: the both side ends of the upper layer cross-arm are equal It is provided with wire insulation substring.

7. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: edge is set in the two sides of the upper layer cross-arm It is equipped with ground wire hardware tool string.

8. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: being provided on lower layer's cross-arm several Wire insulation substring.

9. a kind of double loop as described in claim 1, which is bored, gets over steel pipe pole, it is characterized in that: the ground wire is set to ground wire hardware tool string On.

10. a kind of transmission system, it is characterized in that: including that more steel is bored in multiple double loops as claimed in any one of claims 1-9 wherein Tube rod and conventional double loop, which are bored, gets over steel pipe pole, and the multiple double loop, which is bored, gets over the centre that transmission line is arranged in steel pipe pole, conventional Double loop, which is bored, gets over the edge side that transmission line is arranged in steel pipe pole.