CN205243135U - Two times overhead transmission line alternately bores tower more - Google Patents

Abstract

The utility model relates to a double-circuit overhead transmission line cross-drilling tower, which includes a tower body which is assembled from a plurality of galvanized angle steel rods; the galvanized angle steel rods are connected and fixed by bolts and steel plates; the tower body The top of the ground wire cross-arm is installed; the bottom of the ground wire cross-arm is successively provided with the first line cross-arm, the second line cross-arm, the third line cross-arm, and the drilling cross-arm; the first line cross-arm The lengths of the second line cross-arm and the third line cross-arm are all shorter than the length of the drilling cross-arm and decrease successively, and their left and right ends are provided with a jumper hanging point connected to the drilling cross-arm through a jumper 1. There is a line hanging point connected to the wire on both sides of the front and back. The utility model is a special tower type for cross-drilling of 35kV double-circuit overhead transmission lines. The original line conductors are used to directly drill higher-level transmission lines, which eliminates the need for cable connection transition links, reduces construction complexity, and improves the reliability and reliability of the line. safety.

Description

A double-circuit overhead transmission line cross-drilling tower

technical field

The utility model relates to a drill-over tower, in particular to a double-circuit overhead transmission line cross drill-over tower.

Background technique

Existing 35kV transmission lines cross-drill higher-level transmission lines generally through cable connection transitions or erection of line structures under the drilled lines. However, for the double-circuit line on the same tower, the line structure will occupy a large area, need to build fence protection, and the safety is poor; the use of cable connection transition will be expensive, complicated to manufacture, and poor in reliability. Therefore, the existing crossover design lacks scientific rationality, economy and reliability.

Utility model content

In order to solve the shortcomings of the above-mentioned technology, the utility model provides a double-circuit overhead power transmission line cross-drilling tower.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a double-circuit overhead transmission line cross-drilling tower, including a tower body, the tower body is assembled from a plurality of galvanized angle steel rods; The parts are connected and fixed by bolts and steel plates; the top of the tower body is equipped with a ground wire cross arm; the first line cross arm, the second line cross arm, the third line cross arm and the drilling cross arm are arranged in sequence below the ground wire cross arm. The cross arm; the drilling cross arm is located in the middle of the tower body; the first line cross arm, the second line cross arm, the third line cross arm, and the drilling cross arm are spaced from each other and are symmetrical around the central axis of the tower body;

The cross-arm of the drilling cross-arm is an inverted trapezoid, and its length is respectively greater than the lengths of the first line cross-arm, the second line cross-arm, and the third line cross-arm; the first line cross-arm, the second line cross-arm, and the third line cross-arm The length decreases in turn; the first line cross arm, the second line cross arm, and the third line cross arm are provided with a jumper hanging point at the left and right ends, and a line hanging point at the front and rear sides; There are three jumper hanging points on the top of the left and right ends;

The jumper hanging points at the two ends of the first line cross-arm, the second line cross-arm, and the third line cross-arm are respectively connected with the jumper hanging points above the drilled cross-arm through jumpers; the line hanging points are respectively connected with the wires.

The two innermost jumper hanging points on the cross arm of the drill are respectively connected to the jumper hanging points at both ends of the third line cross arm; the two outermost jumper hanging points on the drill cross arm are respectively connected to the first line The jumper hanging points at both ends of the pole are connected, and the other two jumper hanging points are respectively connected with the jumper hanging points at the two ends of the second line cross arm.

There is a lightning protection wire support on the cross arm of the drilling cross arm, and a lightning protection wire hanging point is arranged on the top of the lightning protection wire support; The hanging point of the lightning conductor on the cross arm is connected horizontally.

The outermost jumper hanging point at one end of the drilled cross arm is horizontally connected with the reverse outermost jumper hanging point on the adjacent tower body drilled through the cross arm through the drilled wire.

The ground wire cross arm is provided with a lightning protection wire support, and the top of the lightning protection wire support is provided with two lightning protection wire hanging points; The hanging point of the lightning protection line and the hanging point of the lightning protection line on the cross arm of the ground wire of the adjacent tower body are connected.

The ground wire and conductors are arranged horizontally; the jumper is composed of bare wires; the insulator string of the jumper is a string of tension insulators.

The utility model is a special tower type for 35kV double-circuit overhead transmission line cross-drilling. The height of the drilling ground wire and the drilling wire is reduced to achieve safe drilling; the tower structure and tower materials have undergone multiple verifications, and targeted enhancements have been made for safety and durability. The utility model adopts the original line conductor to directly drill higher-level transmission lines, avoids the cable connection transition link, reduces the construction complexity, improves the reliability of the line, and has scientific and reasonable design, elegant appearance and wide applicability.

Description of drawings

Fig. 1 is the front view of the utility model.

Fig. 2 is a side view of the utility model.

Fig. 3 is a reference diagram of the use state of the utility model.

In the figure: 1. Cross arm of ground wire; 2. Cross arm of first line; 3. Cross arm of second line; 4. Cross arm of third line; 5. Drilling cross arm; 6. Jumper; 7. Jumper Hanging point; 8. Line hanging point; 9. Ground wire; 10. Conductor; 11. Drilling over ground wire; 12. Drilling over wire; 13. Road; 14. Lines below 10kV and communication lines.

detailed description

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

As shown in Figure 1-3, the utility model includes a tower body, which is assembled from a plurality of galvanized angle steel rods; the galvanized angle steel rods are connected and fixed by bolts and steel plates; the top of the tower body is installed with a ground The line cross arm 1; the first line cross arm 2, the second line cross arm 3, the third line cross arm 4 and the drilling cross arm 5 are arranged in sequence under the ground line cross arm 1; the drilling cross arm 5 is located on the tower body in the middle of the center; the first line cross arm 2, the second line cross arm 3, the third line cross arm 4, and the drilling cross arm 5 are spaced apart from each other and are symmetrical at both ends around the central axis of the tower body;

Drilling cross arm 5 is an inverted trapezoid, and its length is respectively greater than the length of the first line cross arm 2, the second line cross arm 3, and the third line cross arm 4; the first line cross arm 2, the second line cross arm 3, The length of the third line cross arm 4 decreases successively; the left and right ends of the first line cross arm 2, the second line cross arm 3, and the third line cross arm 4 are all provided with a jumper hanging point 7, and the front and rear sides are all provided with There is a line hanging point 8; three jumper hanging points 7 are respectively arranged above the left and right ends of the cross arm 5;

The jumper hanging points at the two ends of the first line cross-arm 2, the second line cross-arm 3, and the third line cross-arm 4 are respectively connected with the jumper hanging point 7 on the top of the cross-arm 5 through the jumper 6; 8 are connected to the wires 10 respectively.

The two innermost jumper hanging points on the cross arm 5 are respectively connected with the jumper hanging points at the two ends of the third line cross arm 4; The jumper hanging points at the two ends of the first line cross arm 2 are connected, and the remaining two jumper hanging points are connected with the jumper hanging points at the two ends of the second line cross arm 3 respectively.

Drilling cross-arm 5 is provided with lightning protection wire support, and the top of lightning protection wire support is provided with a lightning protection wire hanging point; The body drills and connects horizontally over the lightning protection line hanging point on the cross arm 5.

The outermost jumper hanging point of one end of the cross arm 5 is horizontally connected with the reverse outermost jumper hanging point on the adjacent tower body drilled over the cross arm 5 through the drill lead 12 .

The ground wire cross arm 1 is provided with a lightning protection wire support, and the top of the lightning protection wire support is provided with two lightning protection wire hanging points; The hanging point of the lightning protection wire on the top and the hanging point of the lightning protection wire on the adjacent tower body ground wire cross arm 1 are connected.

The ground wires 9 and the wires 10 are arranged horizontally; the jumper wires 6 are made of bare wires; the insulator strings of the jumper wires 6 are tension insulator strings.

The utility model is a 35kV double-circuit overhead transmission line cross-drilling special tower type. The original line conductors 10 are changed from vertical arrangement to horizontal arrangement and lead to the drilling cross-arm 5, which is led by the drilling cross-arm 5 through the drilling conductor 12. To the opposite side; on the opposite side, this type of double-circuit overhead transmission line is used to cross the drilling tower, and the horizontally arranged drilling conductors 12 are connected to the cross arm of the line through the jumper 6, and then changed to vertically arranged and connected to the original line.

The lengths of the first line cross arm 2, the second line cross arm 3, and the third line cross arm 4 of the utility model are successively decreased and are all smaller than the length of the cross arm 5, which ensures the safe distance of the jumper 6 on the tower body; The height of the drilled ground wire 11 and the drilled wire 12 is reduced by the drilled cross arm 5 to realize safe drilled; the structure of the tower body and the tower materials have undergone multiple checks, and the safety and durability have been strengthened in a targeted manner.

The utility model realizes the two functions of the terminal and the drill-over structure on the same base iron tower, which reduces the land occupation; since the distance between the drill-over cross-arm 5 and the ground is far greater than the specification requirement, no fence needs to be built under the drill-over tower, thereby reducing the construction cost , improving line security. The utility model adopts the original line conductor to directly drill higher-level transmission lines, avoids the cable connection transition link, reduces the construction complexity, improves the reliability of the line, and has scientific and reasonable design, elegant appearance and wide applicability.

The above-mentioned embodiments are not limitations to the present utility model, and the present utility model is not limited to the above-mentioned examples. Changes, modifications, additions or replacements made by those skilled in the art within the scope of the technical solutions of the present utility model are also acceptable. All belong to the protection scope of the present utility model.

Claims (6)

1. A double-circuit overhead transmission line cross-drilling tower, including a tower body, is characterized in that: the tower body is assembled from a plurality of galvanized angle steel rods; the galvanized angle steel rods are connected by bolts and The steel plate is connected and fixed; the top of the tower body is equipped with a ground wire cross arm (1); the bottom of the ground wire cross arm (1) is sequentially provided with a first line cross arm (2), a second line cross arm (3 ), the third line cross arm (4) and the drilling cross arm (5); the drilling cross arm (5) is located in the middle of the tower body; the first line cross arm (2), the second line cross arm (3), the third line cross arm (4), and the drilling cross arm (5) are spaced apart from each other and are symmetrical around the central axis of the tower; The drilling cross arm (5) is in an inverted trapezoidal shape, and its length is respectively greater than the lengths of the first line cross arm (2), the second line cross arm (3) and the third line cross arm (4); the first The lengths of the line cross-arm (2), the second line cross-arm (3), and the third line cross-arm (4) decrease in sequence; the first line cross-arm (2), the second line cross-arm (3), the The left and right ends of the three-line cross arm (4) are provided with a jumper hanging point (7), and the front and rear sides are provided with a line hanging point (8); the left and right ends of the drill cross arm (5) There are three jumper hanging points (7) respectively arranged above; The jumper hanging points at the two ends of the first line cross arm (2), the second line cross arm (3) and the third line cross arm (4) pass through the jumper wire (6) and drill through the top of the cross arm (5) respectively. The jumper hanging points (7) are connected; the line hanging points (8) are respectively connected with the wires (10). 2. The double-circuit overhead transmission line cross-drilling tower according to claim 1, characterized in that: the two innermost jumper hanging points on the cross-arm (5) are respectively connected to the third line cross-arm ( 4) The jumper hanging points at both ends are connected; the two outermost jumper hanging points on the drill cross arm (5) are respectively connected to the jumper hanging points at both ends of the first line cross arm (2), and the rest The two jumper hanging points are respectively connected with the jumper hanging points at the two ends of the second line cross arm (3). 3. The double-circuit overhead transmission line cross-drilling tower according to claim 1, characterized in that: the drilling cross-arm (5) is provided with a lightning protection wire support, and the top of the lightning protection wire support is provided with a lightning protection wire hanger point; the hanging point of the lightning protection wire on the top of the lightning protection wire support on the drilled cross arm (5) is horizontally connected with the lightning protection wire hanging point on the adjacent tower body drilled through the cross arm (5) through the drilled ground wire (11). 4. The double-circuit overhead transmission line cross-drilling tower according to claim 3, characterized in that: the jumper hanging point on the outermost side of one end of the cross-arm (5) is connected to the corresponding cross-drilling wire (12) The adjacent tower body is drilled and connected horizontally over the reverse outermost jumper hanging point on the cross arm (5). 5. The double-circuit overhead transmission line cross-drilling tower according to claim 1, characterized in that: the ground wire cross arm (1) is provided with a lightning protection wire support, and the top of the lightning protection wire support is provided with two lightning protection wires Hanging point; the two lightning wire hanging points on the top of the lightning protection wire bracket on the ground wire cross arm (1) are respectively connected with the lightning protection wire hanging point on the drill cross arm (5) and the ground wire cross arm of the adjacent tower body (1 ) connected to the hanging point of the lightning conductor. 6. The double-circuit overhead transmission line cross-drilling tower according to claim 1, characterized in that: the ground wire (9) and the wire (10) are arranged horizontally; the jumper wire (6) is composed of bare wires; The jumper (6) insulator string is a tension insulator string.