An inverted L-shaped double-circuit terminal rod

Abstract

The present invention discloses an inverted L-shaped double-circuit terminal pole, comprising a steel tube pole, and a first cross arm, a second cross arm, a third cross arm, and a fourth cross arm located on the same side of the steel tube pole. The steel tube pole is arranged vertically, and one end of the first cross arm is fixed to the outer peripheral surface of the top end of the steel tube pole. The second cross arm, the third cross arm, and the fourth cross arm are arranged in parallel and spaced from top to bottom below the first cross arm, and one end of the three is respectively fixed to the outer peripheral surface of the steel tube pole. The first cross arm is a ground wire cross arm, and the second cross arm, the third cross arm, and the fourth cross arm are all conductor cross arms. The present invention provides a very economical solution to the problem of pipeline position conflict. The head size of the steel tube pole is optimal, which is more stable and convenient for construction. The shape design of the steel tube pole body and each cross arm is reasonable, and the shape change law is similar to the change law of the internal force of the component, which gives full play to the performance of the material, thereby reducing material waste and reducing engineering investment.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission equipment, in particular to an inverted L-shaped double-circuit terminal pole. Background Art

[0002] With the continuous development of the power grid, new 110 kV overhead transmission lines are usually built with double circuits. Where the overhead transmission lines are routed along existing roads, steel pipe poles are generally used as pole towers. There are often many pipelines on both sides of the road, such as power trenches, rainwater and sewage pipes, gas pipelines, communication pipelines, etc. At this time, there will be a problem that the pole position and its foundation on the transmission line path conflict with the position of the existing buried pipelines. There are two common solutions. One is to change the transmission line path and add corner poles, which will increase the project investment; the other solution is to relocate the pipelines that affect the construction of the transmission line. This solution will not only increase the difficulty of the project construction and increase the construction period, but also the cost of relocating other pipelines is high. Summary of the invention

[0003] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide an inverted L-shaped double-circuit terminal rod to effectively solve the pipeline position conflict problem, reduce engineering costs, and shorten the construction period.

[0004] Technical solution: An inverted L-shaped double-circuit terminal pole, comprising a steel tube pole, and a first crossarm, a second crossarm, a third crossarm, and a fourth crossarm located on the same side of the steel tube pole. The steel tube pole is vertically arranged, and one end of the first crossarm is fixed to the outer circumferential surface of the top end of the steel tube pole. The second crossarm, the third crossarm, and the fourth crossarm are arranged in parallel and spaced apart from top to bottom below the first crossarm, and one end of the three are respectively fixed to the outer circumferential surface of the steel tube pole. The first crossarm is a ground wire crossarm, and the second crossarm, the third crossarm, and the fourth crossarm are all conductor crossarms.

[0005] Furthermore, the length of the first cross arm is 6.95-7m, a ground wire hanging point 1 is provided at the other end of the first cross arm, and a ground wire hanging point 2 is provided at the middle of the first cross arm 3.9-4m away from the ground wire hanging point 1.

[0006] Optimally, the first cross arm includes two rods, one and two, both of which have right-angled trapezoidal vertical cross-sections. The inclined surfaces of rods one and two are both set downward. The large end of rod one and the small end of rod two have equal areas and are connected to each other. A ground wire hanging point two is set at the connection between the two. A ground wire hanging point one is set at the small end of rod one. The large end of rod two is fixed to the steel pipe rod. The slope of the downward inclined surface of rod two is β1=1:17.3~17.5, and the slope of the downward inclined surface of rod one is β2=1:20.6~21.

[0007] Furthermore, the length of the second cross arm is 6.8-6.85 m, the length of the third cross arm is 6.85-6.9 m, the length of the fourth cross arm is equal to the second cross arm, and the spacing between the second cross arm and the third cross arm and between the third cross arm and the fourth cross arm is 3.8-4 m.

[0008] Optimally, a conductor hanging point 1 is provided at the other end of each of the second cross arm, the third cross arm and the fourth cross arm, and a conductor hanging point 2 is provided at the middle of each of the three conductor cross arms at a distance of 4 to 4.05 m from the conductor hanging point 1.

[0009] Furthermore, the second cross arm includes a first rod and a second rod, both of which have vertical cross-sections in the form of right-angled trapezoids. The inclined surfaces of the first rod and the second rod are both set downward. The large end of the first rod and the small end of the second rod have equal areas and are connected to each other. The large end of the second rod is fixed to the steel pipe rod. The slope of the downward inclined surface of the second rod β3 = 1:16.8~17, and the slope of the downward inclined surface of the first rod β4 = 1:19.2~19.5.

[0010] Preferably, the third cross arm and the fourth cross arm have the same structure as the second cross arm.

[0011] Optimally, the distance between the second cross arm and the first cross arm is 4 to 4.5 m.

[0012] Optimally, the cross section of the steel tube rod is a regular hexadecagon, the area of ​​the upper end is smaller than the area of ​​the lower end, and the taper ratio of the steel tube rod is α=1:63.7~82.6.

[0013] Optimally, the height H of the steel pipe pole is 15 to 30 m.

[0014] Beneficial effects: Compared with the prior art, the advantages of the present invention are: 1. It can be used in places where the positions of the tower and foundation conflict with the buried pipeline, providing a very economical solution to the pipeline position conflict problem. 2. According to the electrical clearance required by the 110 kV voltage level specification, combined with the local meteorological conditions, the steel pipe pole shape is scientifically designed, the size of the steel pipe pole head is optimized, more stable and convenient for construction. 3. The shape design of the steel pipe pole body and each cross arm is reasonable, and the shape change law is similar to the change law of the internal force of the component, which gives full play to the performance of the material, thereby reducing material waste and reducing engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0017] Figure 3 It is a structural schematic diagram of a steel pipe rod;

[0018] Figure 4is a structural schematic diagram of the first cross arm;

[0019] Figure 5 It is a structural schematic diagram of the second cross arm. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0021] An inverted L-shaped double-circuit terminal rod, such as Figures 1 to 5 As shown, it includes a steel pipe rod 5, and a first cross arm 1, a second cross arm 2, a third cross arm 3, and a fourth cross arm 4 located on the same side of the steel pipe rod 5.

[0022] The steel tube rod 5 is vertically arranged, and the cross section of the steel tube rod 5 is a regular hexadecagon, the area of ​​the upper end is smaller than the area of ​​the lower end, and the taper rate of the steel tube rod 5 is α=1:63.7-82.6. The regular hexadecagonal structural design makes the cross-sectional inertia moment large, the bending resistance is good, the variable cross section is reasonable, and the material economy is good. The height H of the steel tube rod 5 is 15-30m.

[0023] One end of the first crossarm 1 is fixed to the outer circumferential surface of the top end of the steel pipe rod 5, and the second crossarm 2, the third crossarm 3, and the fourth crossarm 4 are arranged in parallel and spaced apart from top to bottom below the first crossarm 1, and one end of the three are respectively fixed to the outer circumferential surface of the steel pipe rod 5. The spacing between the second crossarm 2 and the first crossarm 1 is 4 to 4.5m, and the spacing between the second crossarm 2 and the third crossarm 3, and between the third crossarm 3 and the fourth crossarm 4 is 3.8 to 4m.

[0024] The first cross arm 1 is a ground wire cross arm, and the second cross arm 2, the third cross arm 3, and the fourth cross arm 4 are all conductor cross arms.

[0025] The length of the first cross arm 1 is 6.95-7m. The first cross arm 1 includes two rods 11 and 12, both of which have right-angle trapezoidal vertical sections. The inclined surfaces of the rods 11 and 12 are both downwardly arranged. The large end of the rod 11 and the small end of the rod 2 12 have equal areas and are connected to each other. A ground wire hanging point 2 is arranged at the connection between the two. A ground wire hanging point 1 is arranged at the small end of the rod 11. The distance between the ground wire hanging point 1 and the ground wire hanging point 2 is 3.9-4m. The large end of the rod 2 12 is fixed to the steel pipe rod 5. The slope of the downward inclined surface of the rod 2 12 is β1=1:17.3-17.5, and the slope of the downward inclined surface of the rod 11 is β2=1:20.6-21. The ground wire hanging point 1 and the ground wire hanging point 2 are both OPGW hanging points.

[0026] The length of the second cross arm 2 is 6.8 to 6.85 m, the length of the third cross arm 3 is 6.85 to 6.9 m, and the length of the fourth cross arm 4 is equal to that of the second cross arm 2 .

[0027] The second cross arm 2 includes a first rod 21 and a second rod 22, both of which have right-angle trapezoidal vertical sections. The inclined surfaces of the first rod 21 and the second rod 22 are both set downward. The large end of the first rod 21 and the small end of the second rod 22 have equal areas and are connected to each other. The large end of the second rod 22 is fixed to the steel pipe rod 5. The slope of the downward inclined surface of the rod 21 is β3 = 1: 16.8 ~ 17, and the slope of the downward inclined surface of the first rod 21 is β4 = 1: 19.2 ~ 19.5. The third cross arm 3 and the fourth cross arm 4 have the same structure as the second cross arm 2.

[0028] A conductor hanging point 1 is respectively provided at the other end of the second cross arm 2, the third cross arm 3 and the fourth cross arm 4, and a conductor hanging point 2 is provided at the middle of the three conductor cross arms 4 to 4.05 m away from the conductor hanging point 1. Both the conductor hanging point 1 and the conductor hanging point 2 are OPGW hanging points.

[0029] When the path of the overhead transmission line conflicts with the buried pipeline, the present invention can alleviate the position conflict problem between the steel pipe pole and its foundation and other pipelines to the greatest extent.

[0030] The electrical gap of the present invention meets the requirements of relevant specifications, has a reasonable mechanical structure design, can fully utilize material properties, and reduce engineering costs; can reduce pipeline migration, reduce engineering investment, and shorten engineering construction period.

[0031] The external dimensions of the invention meet the electrical clearance requirements of the 110kV-750kV overhead transmission line design specification (GB50545-2010) under meteorological conditions in multiple regions, and can hang various types of ground wires (OPGW). The maximum vertical span of the tower is 250m, and the maximum horizontal span is 200m.

[0032] The present invention can design the steel pipe pole into a straight pole or a tension pole in combination with the actual situation of the power line, and can be designed into different call heights H according to the crossing conditions. After the call height is determined, the root diameter of the steel pipe pole can be determined according to the tip diameter and taper rate of the steel pipe pole, and the slope of each cross arm remains unchanged; the material can be selected from Q345, Q420 and other alloy structural steels, and the present invention has strong applicability.

Claims

1. An inverted L-shaped double-circuit terminal rod, characterized in that: It comprises a steel pipe rod (5), and a first cross arm (1), a second cross arm (2), a third cross arm (3), and a fourth cross arm (4) located on the same side of the steel pipe rod (5); the steel pipe rod (5) is arranged vertically, one end of the first cross arm (1) is fixed to the outer peripheral surface of the top end of the steel pipe rod (5); the second cross arm (2), the third cross arm (3), and the fourth cross arm (4) are arranged in parallel and spaced from top to bottom below the first cross arm (1); one end of the three cross arms is respectively fixed to the outer peripheral surface of the steel pipe rod (5); the first cross arm (1) is a ground wire cross arm, and the second cross arm (2), the third cross arm (3), and the fourth cross arm (4) are all conductor cross arms; The length of the first cross arm (1) is 6.95-7 m, a ground wire hanging point 1 is provided at the other end of the first cross arm (1), and a ground wire hanging point 2 is provided at the middle of the first cross arm (1) at a distance of 3.9-4 m from the ground wire hanging point 1; The first cross arm (1) comprises two rod members (11) and (12) both of which have right-angle trapezoidal vertical cross sections. The inclined surfaces of the rod members (11) and (12) are both arranged downwardly. The large end of the rod member (11) and the small end of the rod member (12) have equal areas and are connected to each other. A ground wire hanging point (2) is arranged at the connection between the two. A ground wire hanging point (1) is arranged at the small end of the rod member (11). The large end of the rod member (12) is fixed to the steel pipe rod (5). The slope of the downward inclined surface of the rod member (12) is β1=1:17.3-17.5, and the slope of the downward inclined surface of the rod member (11) is β2=1:20.6-21. The second cross arm (2) comprises a first rod (21) and a second rod (22) both of which have right-angle trapezoidal vertical cross sections. The inclined surfaces of the first rod (21) and the second rod (22) are both arranged downward. The large end of the first rod (21) and the small end of the second rod (22) have equal areas and are connected to each other. The large end of the second rod (22) is fixed to the steel pipe rod (5). The slope β3 of the downward inclined surface of the rod member 2 (12) is 1:16.8-17, and the slope β4 of the downward inclined surface of the first rod (21) is 1:19.2-19.

5. The third cross arm (3) and the fourth cross arm (4) have the same structure as the second cross arm (2).

2. The inverted L-shaped double-circuit terminal rod according to claim 1, characterized in that: The length of the second cross arm (2) is 6.8 to 6.85 m, the length of the third cross arm (3) is 6.85 to 6.9 m, the length of the fourth cross arm (4) is equal to that of the second cross arm (2), and the spacing between the second cross arm (2) and the third cross arm (3) and between the third cross arm (3) and the fourth cross arm (4) is 3.8 to 4 m.

3. An inverted L-shaped double-circuit terminal rod according to claim 1 or 2, characterized in that: A conductor hanging point 1 is respectively provided at the other end of the second cross arm (2), the third cross arm (3) and the fourth cross arm (4), and a conductor hanging point 2 is provided at the middle of the three conductor cross arms at a distance of 4 to 4.05 m from the conductor hanging point 1.

4. The inverted L-shaped double-circuit terminal rod according to claim 1, characterized in that: The distance between the second cross arm (2) and the first cross arm (1) is 4 to 4.5 m.

5. The inverted L-shaped double-circuit terminal rod according to claim 1, characterized in that: The cross section of the steel tube rod (5) is a regular hexadecagon, the area of ​​the upper end is smaller than the area of ​​the lower end, and the taper rate α of the steel tube rod (5) is 1:63.7-82.

6.

6. The inverted L-shaped double-circuit terminal rod according to claim 1, characterized in that: The height H of the steel pipe pole (5) is 15 to 30 m.

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