CN202810314U

CN202810314U - 220kV T-shaped double-circuit drilling tower

Info

Publication number: CN202810314U
Application number: CN201220460231.7U
Authority: CN
Inventors: 宋岩; 魏利民; 李占岭; 王炜; 张益国; 王辉; 赵贞欣; 郭志涛
Original assignee: Hebei Electric Power Design and Research Institute
Current assignee: PowerChina Hebei Electric Power Engineering Co Ltd
Priority date: 2012-09-11
Filing date: 2012-09-11
Publication date: 2013-03-20
Anticipated expiration: 2022-09-11

Abstract

The utility model discloses a 220kV T-shaped double-circuit drilling tower, which is used when a 500kV power transmission circuit is drilled on a 220kV double-circuit power transmission circuit. The 220kV T-shaped double-circuit drilling tower comprises a tower body, a straight arm which is connected with the tower body and a cross arm which is fixed on the upper end of the straight arm, the tower body, the straight arm and the cross arm are respectively truss structures consisting of angle steel, the cross arm and the straight arm form a T shape, the lower edge of the cross arm is sequentially provided with three groups of tensile insulators for hanging a power transmission line from two edges to each inner side of the cross arm and a splayed duplex hard jumper string which is connected with a hard jumper, the interval distance between each group of tensile insulator and the duplex hard jumper string is 5m, two ends of the upper edge of the cross arm are respectively provided with a ground line support, and the top part and the lower part of the ground line support are respectively provided with a ground line hanging point. A tower head is low, the 500kV power transmission circuit can be conveniently drilled, the drilling tower can be used as a cornering tower, requirements on the aspect of the electrical clearance, lightning protection, insulation coordination, electromagnetic environment and the like can be met, a straight tower with the height of 33m can be directly drilled, the 500kV circuit is not changed, and convenience in construction and running can be realized.

Description

220kV T-shaped common-tower double-return bores more tower

Technical field

The utility model relates to the steel tower on a kind of ultra-high-tension power transmission line, specifically a kind of 220kV of making transmission line of electricity brill tower more of boring 500kV transmission line of electricity more.

Background technology

At present, newly-built 220kV circuit is mostly with common-tower double-return Lu Weizhu, the tower head size is higher, when 200kV transmission line of electricity and 500kV transmission line of electricity intersect, the 200kV transmission line of electricity needs to bore below the 500kV circuit to cross, more point selection is very difficult but bore this moment, sometimes has to adopt the mode that detours, sometimes also by rising 500kV circuit or with modes such as 220kV double-circuit line part become single time.These technical schemes are more complicated all, may also need power cut construction, and difficulty of construction is large, investment is high, inconvenient operation maintenance.

If the mode that adopts the 220kV circuit to detour does not change existing 500kV circuit, be the 220kV circuit to be adopted detour or around boring more to 500kV circuit tower higher position.The method advantage is not involve the 500kV circuit, but shortcoming is clearly, and more point itself is just very difficult for the searching brill because the 220kV circuit detours, simultaneously also increase investment, and economy is relatively poor.

If adopt the mode of rising 500kV circuit, do not change 220kV circuit route, be that the steel tower to the 500kV circuit carries out elevation reconstruction, make it to satisfy and bore more requirement.The method is applicable to not have near the crosspoint situation of high tower, and advantage is to have saved the investment of 220kV body, and shortcoming is owing to will transform 500kV circuit in fortune, relates to numerous departments such as power failure, OPGW fiber optic cable communications, and construction period is longer, invests larger.

If adopt the two parts of returning of 220kV to become single time mode, do not change existing 500kV circuit, 220kV common-tower double-return circuit is made into two single loops bore more.Though the method is not changed the 500kV circuit, the 220kV part needs to increase by 2 basic branch towers and 4 basic single loop angle towers, and increase of investment is a lot, and 220kV circuit corridor increases simultaneously, has increased the external coordination difficulty.

The utility model content

The utility model technical issues that need to address provide the Novel iron tower that a kind of tower head is low, can conveniently bore the 220kV transmission line of electricity of getting over the 500kV transmission line of electricity.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:

A kind of 220kV T-shaped common-tower double-return bores more tower, comprise body of the tower, the straight-arm that is connected with body of the tower, be fixed on the cross-arm of straight-arm upper end, body of the tower, straight-arm and cross-arm are the trussed construction that angle steel forms, described cross-arm becomes T-shaped with straight-arm, begin inside every side along the two edges from cross-arm under the cross-arm and set gradually three groups of strain insulators and the hard jumper string of splayed duplex that is connected hard jumping that hang power line, spacing distance between every group of strain insulator and the hard jumper string of duplex is 5m, the two ends on edge are provided with earth wire support on the described cross-arm, and the top of earth wire support and bottom arrange respectively the ground wire hanging point.

Further concrete structure of the present utility model is: the apogee distance ground of described cross-arm and earth wire support is 17m～18m; Described cross-arm bottom surface is 14m～15m apart from the distance on ground, and the distance between two outer faces of cross-arm is 28m, and the distance between two outer faces of earth wire support is 30m.

Because the technological progress of having adopted technique scheme, the utility model to obtain is:

The utility model is used for setting up two-way 220kV transmission line of electricity; its tower head is low; can conveniently bore more 500kV transmission line of electricity; and because having certain width, cross-arm can be used as the angle tower use; and can satisfy the aspect requirements such as electric clearance, lightning protection, Insulation Coordination, electromagnetic environment; this bores more tower and can directly bore and more exhale high be 33m and above tangent tower, does not need the 500kV circuit is carried out any transformation convenient construction and operation.Since the tangent tower of eighty per cant above 500kV circuit exhale all high 33m and more than, the utility model bores more that the tower corner number of degrees are 0～90 degree, bores when therefore boring more the 500kV circuit more to be very easy to select, and can optimize line route, the reduction construction costs.

Adopt the hard jumper string of splayed duplex, both satisfied the requirement of electrical insulation gap, also make steel tower exhale high further reduction, thereby make brill more convenient.The utility model can adopt " asymmetric staged " ground wire to hang method, both can do bore more tower, angle tower use also can do non-brill more tower normally use, when more the shelves steel tower used as non-brill, ground wire was hung on the top of earth wire support, this moment, the ground wire hanging point was high, had good lightning protection properties; When more tower used as brill, the brill of the steel tower more ground wire of shelves side was hung on earth wire support bottom surface place, had reduced so a more shelves tower head size of brill, considered drilled more circuit shielding action and still can satisfy the lightning protection requirement.The hard jumper string of cross-arm and duplex junction also is provided with strain insulator, is arranged in parallel between the strain insulator, and the arrangement mode that therefore will bore the split conductor of getting over shelves has been saved distance to the ground by vertically changing level into.

Description of drawings

Fig. 1 is that the utility model bores the more elevation of tower;

Fig. 2 is the lateral view of Fig. 1;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is the schematic diagram that the utility model bores more single time 500kV circuit;

Fig. 5 is the top view of Fig. 4;

Fig. 6 is that the utility model bores the more schematic diagram of double loop 500kV circuit;

Fig. 7 is the top view of Fig. 6.

Wherein, 1, body of the tower, 2, straight-arm, 3, cross-arm, 4, the hard jumper string of duplex, 5, the hard jumping, 6, strain insulator, 7, earth wire support, 10,220kV T-shaped common-tower double-return bores more tower, 11, the 500kV tangent tower, 12, the 500kV anchor support, 13,500kV power line.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in further details.

Such as Fig. 1, Fig. 2, shown in Figure 3, a kind of 220kV T-shaped common-tower double-return bores more tower, comprises body of the tower 1, the straight-arm 2 that is connected with body of the tower 1, is fixed on the cross-arm 3 of straight-arm 2 upper ends.Body of the tower 1, straight-arm 2 and cross-arm 3 are the trussed construction that angle steel forms, and have one fixed width along the circuit direction.

2 one-tenth T-shaped of cross-arm 3 and straight-arm, the transverse width of straight-arm 2 is 2.4m, and the outer face of cross-arm 3 is 14 meters apart from the distance of the vertical center line of steel tower, and the arm exhibition of whole cross-arm (being the distance between two outer faces of cross-arm) is 28m.The two ends on edge are respectively arranged with earth wire support 7 on the cross-arm 3, and the top of earth wire support 7 and bottom arrange respectively the ground wire hanging point.Distance between two outer faces of earth wire support is 30m.The distance on the apogee distance ground of cross-arm 3 and earth wire support 7 is 17m～18m; Described cross-arm 3 bottom surfaces are 14m～15m apart from the distance on ground.

Three groups of strain insulators 6 and the hard jumper string 4 of splayed duplex that is connected hard jumping 5 that hang power line are set respectively in 3 times both sides along straight-arm 2 of cross-arm, first group of strain insulator 6 and the hard jumper string 4 of splayed duplex are arranged on the edge of cross-arm, second group, the 3rd group strain insulator 6 and the hard jumper string 4 of splayed duplex inwardly reach the setting of straight-arm direction successively, and the spacing distance between every group of strain insulator 6 and the hard jumper string 4 of duplex is 5m.The hard jumper string of duplex 4 lower ends are fixedly connected with hard jumping 5, and cross-arm 3 also is provided with strain insulator 6 with the hard jumper string of duplex 4 junctions, and strain insulator 6 is connected with live wire respectively with the jumping of being connected 5.The non-brill of the steel tower more ground wire of shelves one side hangs over the top of earth wire support 7, bores the bottom that the ground wire of shelves one side more hangs over earth wire support 7.

When the dual loop transmission line of 220kV bores the transmission line of electricity of more single-circuit 500kV, the distance that 220kV T-shaped common-tower double-return bores between the body of the tower perpendicular bisector of Yue Ta center vertical line and 500kV tangent tower can be between 33m～62m, and the side end face that 220kV bores the cross-arm of getting over the adjacent side with the 500kV tangent tower of tower is apart from the body of the tower of 500kV tangent tower 10m at least.

At newly-built 220kV common-tower double-return circuit and 500kV crossing elimination place, each vertical one basic 220kV T-shaped common-tower double-return bores more tower in the both sides of 500kV circuit, by adjust to bore tower more exhale height, the corner number of degrees, to the parameters such as distance of 500kV steel tower, can realize boring more.Schematic diagram when the transmission line of electricity of 220kV bores more single time 500kV circuit as shown in Figure 4 and Figure 5.

When the dual loop transmission line of 220kV bores the transmission line of electricity of more two circuit 500kV, distance between the body of the tower perpendicular bisector of 220kV brill Yue Ta center vertical line and 500kV tangent tower can be between 33m～42m, bore operation deflection 3.2 degree between two steel towers of shelves more, the side end face that 220kV bores the cross-arm of the adjacent side with the 500kV tangent tower of tower more is apart from the body of the tower of 500kV tangent tower 10m at least.

Claims

1. a 220kV T-shaped common-tower double-return bores more tower, comprise body of the tower (1), the straight-arm (2) that is connected with body of the tower (1), be fixed on the cross-arm (3) of straight-arm (2) upper end, it is characterized in that: described body of the tower (1), straight-arm (2) and cross-arm (3) are the trussed construction that angle steel forms, cross-arm (3) becomes T-shaped with straight-arm (2), begin inside every side along the two edges from cross-arm under the cross-arm (3) and all set gradually three groups of hard jumper strings of splayed duplex (4) that hang the strain insulators (6) of power line and be connected hard jumping (5), spacing distance between every group of strain insulator (6) and the hard jumper string of duplex (4) is 5m, the two ends on the upper edge of described cross-arm (3) are provided with earth wire support (7), and top and the bottom of earth wire support (7) arrange respectively the ground wire hanging point.

2. 220kV T-shaped common-tower double-return according to claim 1 bores more tower, and it is characterized in that: the apogee distance ground of described cross-arm (3) and earth wire support (7) is 17m～18m; Described cross-arm (3) bottom surface is 14m～15m apart from the distance on ground, and the distance between two outer faces of cross-arm (3) is 28m, and the distance between two outer faces of earth wire support (7) is 30m.