CN203905578U - Truss beam capable of increasing 35kV line height - Google Patents

Abstract

A truss girder capable of raising the height of 35kV lines. It includes vertical beams, lower cross arms, multiple cable-stayed wires, diagonal braces, multiple hoops and upper cross arms; the lower end of the vertical beams is fixed to the upper end of the concrete pole by hoops and screws; the lower cross arms are made of angle steel, and the middle Fixed in the middle of the vertical beam, with at least one insulating string suspension rod connected to both ends; the upper cross arm is made of angle steel, one end is fixed on the upper end of the vertical beam, and at least one insulating string suspension rod is connected to the outer end; the upper ends of multiple cable-stayed wires It is connected to the upper end or middle part of the vertical beam, and the lower end is connected to the outer end of the lower cross arm; the two ends of the diagonal brace are respectively connected to the outer end of the upper cross arm and the upper part of the vertical beam. The effect of the utility model: the use of the concrete pole with the truss girder completely solves the problem of safe distance across roads, warehouses, roofs, and power distribution lines under geographical conditions such as replacement of iron towers and laying of power cables. Compensation for permanent land occupation of the foundation has been cancelled, saving investment.

Description

A truss beam capable of increasing the height of 35kV lines

technical field

The utility model belongs to the technical field of electric power facilities, in particular to a truss beam capable of raising the height of a 35kV line.

Background technique

In the power system, according to the line design specifications and line operation regulations, the distance between the 35kV voltage level line across the highway and the ground should not be less than 6.5 meters. At present, there are still a large number of distribution lines mainly composed of 10kV to 35kV concrete poles in the vast countryside. With the rapid development of the economy, the existing roads are widened, repaired, the foundation is raised, and the construction of houses under the line will lead to insufficient distance between the original wire and the ground. Therefore, in order to ensure the safe operation of power lines, it is necessary to heighten the concrete poles on both sides of the road. The traditional method is to remove the 35kV concrete poles on both sides of the road and replace them with two single-circuit 15-meter single-circuit iron towers, so that the conductor can be raised to keep a sufficient safe distance from the road. Generally, a self-supporting iron tower is used, and its structure includes a foundation and an iron body. However, when this scheme is adopted, the design, construction, and transportation are cumbersome, and the construction period is long; permanent land acquisition is required for foundation construction; and compensation for road repair and ground objects is also required during the construction process. In addition, the replacement of a basic iron tower requires an investment of 40,000 to 50,000 yuan, which does not include the basic permanent land acquisition, temporary land occupation and compensation for green land, so the cost is quite high.

Contents of the invention

In order to solve the above problems, the purpose of this utility model is to provide a truss girder capable of increasing the height of 35kV lines.

In order to achieve the above purpose, the truss girder provided by the utility model that can increase the height of the 35kV line includes a vertical beam, a lower cross arm, a plurality of cable stays, a diagonal brace, a plurality of hoops and an upper cross arm; wherein the lower end of the vertical beam is used The hoop and screws are fixed on the upper end of the concrete pole; the lower cross arm is made of angle steel, the middle part is fixed in the middle of the vertical beam, and at least one insulating string suspension rod is connected to both ends; the upper cross arm is made of angle steel, and one end is fixed on the vertical beam The upper end and the outer end are connected with at least one insulating string suspension rod; the upper ends of multiple cable-stayed wires are connected to the upper or middle part of the vertical beam, and the lower ends are connected to the outer end of the lower cross arm; the two ends of the diagonal brace are connected to the upper cross arm respectively The outer end and the upper part of the upright.

The lower cross arm, the upper cross arm and the vertical beam are connected with each other by bolts.

The length of the vertical beam is 3m.

The lengths of the lower cross arm and the upper cross arm are 1.2m and 1.5m respectively.

The truss girder that can increase the height of 35kV line provided by the utility model has the following beneficial effects:

(1) The concrete pole with this truss girder has been adopted to completely solve the problem of safety distance across roads, warehouses, roofs and power distribution lines under geographical conditions such as replacement of iron towers and laying of power cables. The distance to the ground across the road is increased to 7.5 meters; the distance across the distribution line is greater than 3 meters; the vertical distance across the warehouse and the roof is greater than 3.5 meters.

(2) Compensation for the permanent land occupation of the foundation has been cancelled, which saves investment, not only meets the need for leapfrog use, but also greatly reduces the construction cost.

(3) Efficiency: Traditionally, it takes 1 day to complete a power outage group tower construction period. It only takes 0.5 days to complete a power outage installation by using the truss beam, the work efficiency is increased by 2 times, and the power outage time is reduced by 6 hours.

(4) The traditional 35kv line requires an investment of 40,000 yuan to replace a basic iron tower body, not including the cost of permanent land acquisition, temporary land occupation and green land compensation. The price of using this truss beam does not exceed 1,000 yuan, and can be reused times, saving 97.5% of investment.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the truss girder that can increase the height of the 35kV line provided by the utility model.

Fig. 2 is a sectional view along A-A in Fig. 1 .

Detailed ways

The truss girder capable of increasing the height of 35kV lines provided by the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, the truss girder provided by the utility model that can increase the height of 35kV line includes a vertical beam 1, a lower cross arm 2, a plurality of diagonal stays 3, a diagonal brace 4, a plurality of hoops 5 and an upper Cross arm 6; the lower end of vertical beam 1 is fixed to the upper end of concrete pole 7 by hoop 5 and screws; the lower cross arm 2 is made of angle steel, the middle part is fixed on the middle part of vertical beam 1, and at least one insulating string is connected to the two ends for suspension Rod 8; the upper cross arm 6 is made of angle steel, one end is fixed on the upper end of the vertical beam 1, and the outer end is connected with at least one insulating string suspension rod 8; connected to the outer end of the lower cross arm 2;

The lower cross arm 2, the upper cross arm 6 and the vertical beam 1 are connected with each other by bolts.

The length of the vertical beam 1 is 3m.

The lengths of the lower cross arm 2 and the upper cross arm 6 are 1.2m and 1.5m respectively.

When the truss girder provided by the utility model that can increase the height of the 35kV line is in use, insulating strings can be respectively set on the insulating string suspension rods 8 on both sides of the lower cross arm 2, and a phase conductor can be installed on the insulating strings. Insulation strings are arranged on the insulation string suspension bar 8 of cross arm 6, and a phase conductor is installed on the insulation strings.

Claims (4)

1. can improve a girder truss for 35kV line levels, it is characterized in that: it comprises vertical beam (1), bottom cross-arm (2), many lateral conductors (3), hound (4), a plurality of anchor ear (5) and top cross-arm (6); Wherein the lower end of vertical beam (1) utilizes anchor ear (5) and screw to be fixed on concrete bar (7) upper end; Bottom cross-arm (2) is made by angle steel, and middle part is fixed on vertical beam (1) middle part, and two ends are connected with respectively at least one insulator string hanger bar (8); Top cross-arm (6) is made by angle steel, and one end is fixed on vertical beam (1) upper end, and outer end is connected with at least one insulator string hanger bar (8); The upper end of many lateral conductors (3) is connected to upper end or the middle part of vertical beam (1), and lower end is connected to bottom cross-arm (2) outer end; The two ends of hound (4) are connected to the outer end of top cross-arm (6) and the top of vertical beam (1).

2. the girder truss that can improve 35kV line levels according to claim 1, is characterized in that: between described bottom cross-arm (2) and top cross-arm (6) and vertical beam (1), adopt bolt to interconnect.

3. the girder truss that can improve 35kV line levels according to claim 1, is characterized in that: the length of described vertical beam (1) is 3m.

4. the girder truss that can improve 35kV line levels according to claim 1, is characterized in that: described bottom cross-arm (2) and the length of top cross-arm (6) are respectively 1.2m and 1.5m.