Composite material compact transmission line shaft tower
Technical field
The utility model belongs to power transmission and distribution project field, relates to overhead power transmission line pole tower, particularly a kind of composite material compact transmission line shaft tower.
Background technology
The definition of compact overhead transmission line is: by optimizing the arrangement of wire, be placed in by three-phase conducting wire in same tower window, no ground component between three-phase conducting wire, reaches raising natural transmission power, reduce width of corridor, improve the overhead transmission line of unit corridor width transmission line capability.The structure of regular compact transmission line of electricity is as shown in Figure 5: because three-phase conducting wire is in same tower window, and cause tower window large, consumption steel is many, use insulator is many, and construction investment is high, and in order to avoid tower window excessive, the insulation margin of the air gap and insulator string is little, and gap discharge accident probability is high.Letter, regular compact transmission line of electricity exists that quality is heavy, cost is high, discharge accident probability high-technology problem.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of composite material compact transmission line shaft tower.This shaft tower can realize the object improving natural power and reduce width of corridor, reduce construction costs, ensure transmission line of electricity safe operation.
It is as follows that the utility model solves the problems of the technologies described above taked technical scheme: a kind of composite material compact transmission line shaft tower, comprises steel tower body, tower head, hanging wire gold utensil; It is characterized in that: tower head comprises epimere tower head, stage casing tower head and hypomere tower head, epimere tower head and hypomere tower head are steel tower head, stage casing tower head is composite material tower head, epimere tower head lower end is fixedly connected with tower head upper end, stage casing, tower head lower end, stage casing is fixedly connected with hypomere tower head upper end, and hanging wire installation is at stage casing tower head.
The metal cat ladder of roughly rectangular laying is installed with between epimere tower head and hypomere tower head, metal cat ladder provides ground wire grounded passage and maintenance livewire work passage, be imposed load owing to this cat ladder only having the weight of people and Work tool, so very light in weight, cat ladder far also can not affect construction investment apart from charged point, the combinational gap of livewire work can be ensured, provide enough nargin to hotline maintenance.
The top of the metal cat ladder that epimere tower head is installed is installed with steel cable, and upper steel cable one end is installed on epimere tower head, the other end is installed on metal cat ladder; The top of the metal cat ladder that hypomere tower head is installed is installed with lower steel cable, and lower steel cable one end is installed on hypomere tower head, the other end is installed on metal cat ladder.
Upper steel cable and lower steel cable are required level of service hanging safety belt use when moving, and object ensures being perfectly safe of maintenance worker.
Because hanging wire installation is at stage casing tower head, stage casing tower head is that composite material makes, and is composite material between three-phase conducting wire, there is no earthing component, meet the definition of compact line, can realize reducing wire spacing, reach the object improving natural power and reduce width of corridor.The utility model structure is simple, stressed clear, although composite material price is higher than steel, because consumable quantity is less than regular compact, and can investment reduction.Because composite material itself is insulation, so insulator can be used no longer in addition, also construction investment can be saved at insulator portion.
The utility model be beneficial effect mainly: by using composite material at steel tower head, reaching the alternate no ground component of compact line three, achieving and improve natural power and reduce the object of width of corridor.Use composite material can increase air gap and dielectric strength, ensure safe operation.Use composite material compact to reduce construction costs, be conducive to applying of compact technology.
The utility model both can be applied in the newly-built compact line of 330kV, 500kV and 750kV, also can carry out at the compact line that original accident is more using in technological transformation.The utility model meets the requirement of super-pressure KV Electric Transmissions technology upgrading, it is the combination of new material (composite material) and new technology (compact overhead transmission line), the construction investment of compact can be reduced about 20%, be conducive to applying of compact technology, there is larger facilitation to the construction of electrical network and safety and economic operation, have good application prospect.
Accompanying drawing explanation
Fig. 1 is the first technical scheme of the present utility model,
Fig. 2 is the tower head structural representation of Fig. 1,
Fig. 3 is the second technical scheme of the present utility model,
Fig. 4 is the tower head structural representation of Fig. 3,
Fig. 5 is the structural representation of regular compact transmission line of electricity.
In figure: 1-tower head, 101, C-epimere tower head, 102, B-stage casing tower head, 103, A-hypomere tower head, 2-upper steel cable, 3-steel tower body, 4-metal cat ladder, 5-hanging wire gold utensil, 6-lower steel cable.
Detailed description of the invention
Embodiment 1, as shown in Figures 1 and 2: a kind of composite material compact transmission line shaft tower, comprises steel tower body 3, tower head 1, hanging wire gold utensil 5; Tower head 1 comprises epimere tower head 101, stage casing tower head 102 and hypomere tower head 103, epimere tower head 101 and hypomere tower head 103 are steel tower head, stage casing tower head 102 is composite material tower head, epimere tower head 101 lower end is fixedly connected with stage casing tower head 102 upper end, stage casing tower head 102 lower end is fixedly connected with hypomere tower head 103 upper end, and hanging wire gold utensil 5 is arranged on stage casing tower head 102.In order to represent clear by the utility model three sections of tower heads, the C section shown in figure is epimere tower head 101, B section is stage casing tower head 102, A section is hypomere tower head 103.
Be installed with the metal cat ladder 4 of roughly rectangular laying between epimere tower head 102 and hypomere tower head 103, metal cat ladder 4 is as ground wire grounded passage and maintenance livewire work passage.
The top of the metal cat ladder 4 that epimere tower head 101 is installed is installed with steel cable 2, and upper steel cable 2 one end is installed on epimere tower head 101, the other end is installed on metal cat ladder 4; The top of the metal cat ladder 4 that hypomere tower head 103 is installed is installed with lower steel cable 6, and lower steel cable 6 one end is installed on hypomere tower head 103, the other end is installed on metal cat ladder 4.Upper steel cable 2 is hanging safety belt use when required level of service moves with lower steel cable 6, ensures being perfectly safe of maintenance worker.
The composite material compact transmission line shaft tower that the present embodiment provides, the hanging wire gold utensil 5 that its stage casing tower head 102 is installed is arranged in equilateral triangle; Namely the hanging wire gold utensil 5 of two wires is arranged on the tower body arranged on left and right sides of stage casing tower head 102 bottom, and the hanging wire gold utensil 5 of another root wire is arranged on the centre of stage casing tower head 102 top tower body.Program advantage is three-phase conducting wire is that equilateral triangle is laid, and three-phase conducting wire charge balance degree is better, and shortcoming is that middle phase conductor passes tower body, slightly inconvenient during construction.
Embodiment 2, as shown in Figure 3 and Figure 4: the composite material compact transmission line shaft tower that the present embodiment provides, the hanging wire gold utensil 5 that its stage casing tower head 102 is installed is presented font and is arranged; Namely the hanging wire gold utensil 5 of two wires is arranged on the tower body arranged on left and right sides of stage casing tower head 102 bottom, and the hanging wire gold utensil 5 of another root wire is arranged on the right side of stage casing tower head 102 top tower body; Certainly the hanging wire gold utensil 5 of another root wire also can be arranged on the left side of stage casing tower head 102 top tower body.Program three-phase conducting wire is that non-equilateral triangle is laid, and comparatively equilateral triangle composite material compact scheme is slightly poor for three-phase conducting wire charge balance degree, and on wire, font is furnished with and is beneficial to construction and maintenance.Other is identical with embodiment 1.
The upper font composite material compact transmission line shaft tower that the equilateral triangle composite material compact transmission line shaft tower embodiment that embodiment 1 provides and embodiment 2 provide respectively has pluses and minuses, selects the application scheme be applicable to during enforcement for concrete engineering.
Shown in the structure chart 5 of regular compact transmission line of electricity: three-phase conducting wire, in same tower window, exists the shortcomings such as tower window is large, consumption steel is many, use insulator is many.