CN203924870U - Queen post is bored more pylon structure - Google Patents

Abstract

The utility model relates to a kind of queen post and bores more pylon structure, comprise cross-arm, below, described cross-arm middle part is provided with middle conducting wire hanging point, described cross-arm two ends are symmetrically connected with respectively outward extending wire support, described wire support end is equipped with limit conducting wire hanging point, the top at described cross-arm two ends is symmetrically connected with respectively outward-dipping earth wire support, described earth wire support end all bends and is provided with ground wire hanging point downwards, the below at described cross-arm two ends is connected with a upright and separated left side, right post leg, a described left side, right post leg forms by upper prop leg and the linking of lower prop leg, a described left side, the upper prop leg of right post leg is contour, a described left side, the lower prop leg of right post leg adopts height coupled column leg.This queen post is bored more pylon structure, and to have structural configuration succinct, and applicability is stronger, protection of the environment, the advantage such as comprehensive economic index is more superior, and processing, installation and operation maintenance are more convenient.

Description

Double-column drill-through tower structure

technical field

The utility model relates to a double-column drill-through tower structure, which belongs to the field of electric equipment.

Background technique

Drilling towers are mostly used in the case where lines of different voltage levels cross across transmission lines, and lines of low voltage levels pass through lines of high voltage levels. In order not to affect the electrical environment of the original line, the drill-through tower usually requires the height of the tower to be reduced as much as possible under the premise of satisfying electrical safety, the arrangement of the conductors is more compact, and the use of different terrain conditions is also required.

At present, most of the existing drilling tower products adopt the wine glass structure as shown in Figure 1. Although this structure type has a compact tower head and a beautiful appearance, the distance between the wires is small, and the size of the crossarm is relatively small. It is suitable for the drill-through scheme of general transmission lines, but has the following disadvantages:

(1) Since the drilling tower is limited by the height of the tower, the setting of the level difference between the high and low legs is restricted. When the terrain height difference where the tower is located is large, the combination of high and low legs often cannot meet the use, resulting in a large amount of earth and stone excavation and The destruction of vegetation near the tower site not only destroys the natural landscape, but also easily causes soil erosion in the mountain due to the destruction of vegetation, and may even cause landslides in serious cases, which has an adverse effect on the stability of the foundation slope and the tower site;

(2) The structural type is subjected to complex forces, especially the "K"-shaped joints at the junction of the upper and lower crank arms, which are the weak link of the overall structural connection. In actual projects, it often occurs that the joints cannot be used due to excessive deformation. It is difficult to control accurately in the design, and there are certain safety hazards;

(3) The number of tower head components is large, which affects the weight of the tower, which in turn affects the economic indicators of the tower.

Utility model content

Aiming at the shortcomings of the traditional drill-through tower structure, the purpose of this utility model is to provide a double-column drill-over tower structure. Big improvement.

In order to achieve the above purpose, the technical solution of the present utility model is: a double-column drill-through tower structure, including a cross arm, a middle wire hanging point is provided under the middle part of the cross arm, and the two ends of the cross arm are symmetrically connected There are wire brackets extending outwards, and the ends of the wire brackets are provided with side wire hanging points, and the tops of the two ends of the cross arm are symmetrically connected with outwardly inclined ground wire brackets, and the ends of the ground wire brackets are all bent downwards. It is folded and equipped with a ground wire hanging point. The two ends of the cross arm are connected with upright and separated left and right column legs. The left and right column legs are connected by the upper column leg and the lower column leg. The upper column legs of the left and right column legs are of equal height, and the lower column legs of the left and right column legs adopt high and low combination column legs.

Further, the cross-arm adopts lattice beams with left-right symmetry and equal width in full length, and the left and right column legs adopt lattice columns with equal width up and down.

Further, the cross arms and the webs of the left and right column legs are all arranged in the form of cross members.

Further, the width of the left and right column legs is 1300mm, and the height of the upper column legs is 7500mm.

Further, the height-combined column legs include any one or more of 1500mm column legs, 2500mm column legs, 3500mm column legs, 4500mm column legs, 5500mm column legs, 6500mm column legs and 7500mm column legs.

Further, the distance between the left and right column legs is 5800mm.

Further, the total length of the cross arm is 8400mm.

Further, the horizontal distance between the hanging point of the ground wire and the hanging point of the neutral wire is 6800mm.

Further, the length of the wire support is 2600mm.

Further, the vertical distance between the hanging point of the ground wire and the hanging point of the side wire on the same side is 3500mm.

Compared with the traditional wine glass tower, the utility model has the following advantages:

(1) Structural layout is simple: the force transmission path of this structural system is clear and clear, which overcomes the shortcomings of the traditional wine glass tower structure "K" type joints with complex stress and easy deformation during construction. The overall structure has no weak links and has a high Safety and reliability.

(2) Stronger applicability: the extreme difference setting of high and low combined column legs is more flexible, and it can be applied to terrain conditions with a maximum height difference of 6 meters (terrain slope θ=46°); Under the premise of a safe distance from the ground, through the combined use of high and low column legs, one tower can be used for multiple purposes, and it is suitable for a height of 9 meters to 15 meters.

(3) Protecting the environment: the design of high and low combined column legs avoids a large amount of earth and rock excavation and damage to vegetation near the tower due to the height difference between the slope of the mountain and the base of the tower, protects the natural landscape and reduces soil erosion in the mountain. It is also conducive to the safety and stability of the tower base.

(4) The comprehensive economic indicators are superior: the layout of the double-column tower is simpler, and the amount of steel is less; the distance between the double-column legs (root opening) is larger, the foundation force is relatively smaller, and the amount of foundation concrete and reinforcement is more less; double-column legs have less earthwork excavation than traditional four-leg towers; the overall economic index can be reduced by about 8%.

(5) Processing, installation, operation and maintenance are more convenient: Compared with the complex wine glass tower, the simple structural layout system of the double-column drill-through tower reduces the workload of tower lofting and processing; The separated double-column legs and the overall hoisting of the cross-arm effectively shorten the construction period; compared with the traditional wine glass tower with inclined tower head crank arms, the vertical column legs are more conducive to ensuring the safety of maintenance and climbing personnel.

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

Description of drawings

Figure 1 is a single line diagram of a conventional drill-through tower.

Fig. 2 is a single line diagram of an embodiment of the present invention.

In the figure: 1-cross arm, 2-wire bracket, 3-ground wire bracket, 4-column leg, A-side wire hanging point, B-ground wire hanging point, O-middle wire hanging point, D-high and low column legs Connecting point, D1- the horizontal distance between the hanging point of the ground wire and the hanging point of the middle wire, D2- the vertical distance between the hanging point of the ground wire and the hanging point of the side wire on the same side, H1- the height of the upper column leg, L- the ground surface Line, L1-the total length of the cross arm, L2-the length of the wire support, T1-1500mm column leg, T2-7500mm column leg, b-column leg width, d-distance between left and right column legs, θ-terrain slope.

Detailed ways

As shown in Figure 2, a double-column drill-and-over tower structure includes a cross arm 1, a center wire hanging point O is provided below the middle of the cross arm 1, and two ends of the cross arm 1 are symmetrically connected with outward Extended wire bracket 2, the ends of the wire bracket 2 are provided with side wire hanging points A, and the tops of the two ends of the cross arm 1 are respectively symmetrically connected with outwardly inclined ground wire brackets 3, and the ends of the ground wire brackets 3 are each It is bent downward and provided with a ground wire hanging point B, and the two ends of the cross arm 1 are connected with upright and separated left and right column legs 4, and the left and right column legs 4 are composed of upper column legs and lower column legs. The legs are joined together, the upper legs of the left and right legs 4 are of the same height, and the lower legs of the left and right legs 4 adopt high and low combination legs.

In this embodiment, the cross-arm 1 adopts lattice beams with left-right symmetry and equal width in full length, the left and right column legs 4 adopt lattice columns with up-and-down equal widths, and the cross-arm 1 and left and right The web members of the column legs 4 are all arranged in the form of cross members, and the structural arrangement is very simple.

In this embodiment, the width b of the left and right column legs 4 is 1300 mm, the height H1 of the upper column legs is 7500 mm, and the height combination column legs adopted by the lower column legs include 1500 mm column legs T1, 2500 mm column legs, Any one or more of 3500mm column legs, 4500mm column legs, 5500mm column legs, 6500mm column legs and 7500mm column legs T2. One height column leg.

In this embodiment, the distance d between the left and right column legs 4 is 5800 mm, the total length L1 of the cross arm 1 is 8400 mm, and the distance between the hanging point B of the ground wire and the hanging point O of the middle wire The horizontal distance D1 is 6800mm. The length L2 of the wire support 2 is 2600 mm, and the vertical distance D2 between the ground wire hanging point B and the side wire hanging point A on the same side is 3500 mm.

This tower is suitable for 220kV voltage level single-circuit transmission lines, for example: the specific name is DJ36SZ, the design basic wind speed is V=33 m/s, the ice coating C=0mm, the design rotation angle is 0~10°, and the wire adopts 2 *JL/LB20A-630/45 (safety factor 2.5), the ground wire adopts 1*JL/LB20A-95/55 (safety factor 3.0), the horizontal span is 200 meters, the vertical span is 280 meters, and the front side represents the span of 200 meters, and the rear side represents a span of 150 meters.

The above descriptions are only preferred embodiments of the present utility model, and all equivalent changes and modifications made according to the patent scope of the present utility model shall fall within the scope of the present utility model.

Claims (10)

1. a queen post is bored more pylon structure, comprise cross-arm, it is characterized in that: below, described cross-arm middle part is provided with middle conducting wire hanging point, described cross-arm two ends are symmetrically connected with respectively outward extending wire support, described wire support end is equipped with limit conducting wire hanging point, the top at described cross-arm two ends is symmetrically connected with respectively outward-dipping earth wire support, described earth wire support end all bends and is provided with ground wire hanging point downwards, the below at described cross-arm two ends is connected with a upright and separated left side, right post leg, a described left side, right post leg forms by upper prop leg and the linking of lower prop leg, a described left side, the upper prop leg of right post leg is contour, a described left side, the lower prop leg of right post leg adopts height coupled column leg.

2. queen post according to claim 1 is bored more pylon structure, it is characterized in that: described cross-arm adopts lattice girder symmetrical and that total length is wide, and described left and right post leg adopts upper and lower wide lattice column.

3. queen post according to claim 2 is bored more pylon structure, it is characterized in that: the pattern that the web member of described cross-arm and left and right post leg all adopts intersection material to arrange.

4. queen post according to claim 1 is bored more pylon structure, it is characterized in that: the width of described left and right post leg is 1300mm, and its upper prop leg height is 7500mm.

5. according to the queen post described in claim 1 or 4, bore more pylon structure, it is characterized in that: described height coupled column leg comprises any one or more in 1500mm post leg, 2500mm post leg, 3500mm post leg, 4500mm post leg, 5500mm post leg, 6500mm post leg and 7500mm post leg.

6. queen post according to claim 1 and 2 is bored more pylon structure, it is characterized in that: the distance between described left and right post leg is 5800mm.

7. queen post according to claim 1 and 2 is bored more pylon structure, it is characterized in that: the total length of described cross-arm is 8400mm.

8. queen post according to claim 1 is bored more pylon structure, it is characterized in that: the horizontal range between described ground wire hanging point and middle conducting wire hanging point is 6800mm.

9. queen post according to claim 1 is bored more pylon structure, it is characterized in that: the length of described wire support is 2600mm.

10. queen post according to claim 1 is bored more pylon structure, it is characterized in that: ground wire hanging point and the vertical distance between the conducting wire hanging point of limit of the same side are 3500mm.