CN212376389U - 110kV drum type double-loop composite cross arm tower - Google Patents
110kV drum type double-loop composite cross arm tower Download PDFInfo
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- CN212376389U CN212376389U CN202021521807.7U CN202021521807U CN212376389U CN 212376389 U CN212376389 U CN 212376389U CN 202021521807 U CN202021521807 U CN 202021521807U CN 212376389 U CN212376389 U CN 212376389U
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- 239000002131 composite material Substances 0.000 title claims abstract description 70
- 239000012212 insulator Substances 0.000 claims abstract description 57
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 43
- 239000010959 steel Substances 0.000 claims abstract description 43
- 150000001875 compounds Chemical class 0.000 claims abstract description 10
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 16
- 238000013461 design Methods 0.000 abstract description 2
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- 230000005540 biological transmission Effects 0.000 description 17
- 229910000746 Structural steel Inorganic materials 0.000 description 6
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- 210000003608 fece Anatomy 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
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Abstract
The utility model discloses a 110kV drum type double circuit composite cross arm tower, including two sets of three-phase combined material cross arm, two sets of steel ground wire support and angle steel body of the tower. The post insulator is connected with the double-spliced angle steel through a connecting piece at the end part of the tower frame by a bolt; in the cable-stayed insulator, an independent pull rod is respectively connected with a double-pin angle steel and a conductor end sleeve head of a post insulator through an annular connecting piece, a long pull rod and a two-half pull rod are connected into a combined pull rod body through an annular structure, and the combined pull rod body is respectively connected with the conductor end sleeve head of the post insulator and an L-shaped connecting plate at a tower body through the annular connecting piece; the ground wire bracket is positioned at the top of the tower. Except that the composite cross arm post insulator and the diagonal tension insulator are made of composite materials, other structures are angle steel or steel connecting pieces. The utility model discloses use FRP combined material cross arm, according to its distinctive insulating characteristics, improve cross arm and shaft of the tower junction, remedied the not enough of material rigidity through structural design, realized the rational connection of compound cross arm and angle steel tower main part.
Description
Technical Field
The utility model belongs to the high-tension transmission field relates to a 110kV drum type double circuit composite cross arm tower, concretely relates to take three of two division pull rods to draw a pressure cross arm structure system and construct with the body of a tower that this system corresponds.
Background
In the transmission line, the traditional pole tower used by the overhead transmission line has the defects of large mass, easy corrosion, easy cracking, short service life and the like. Due to the structure of the tower body, the problems of windage yaw tripping, bird droppings flashover, wide line corridor, lightning stroke tripping, overhigh tower body, ice flashover accidents and the like exist, and the construction cost, the operation and maintenance cost and the economic performance are high.
The FRP composite material has the characteristics of high strength, light weight, corrosion resistance, good durability and electrical insulation performance and the like, and is very suitable for manufacturing transmission towers. The FRP composite material is used for manufacturing the composite cross arm, so that the insulating property of the cross arm is improved, and the size of a tower head is reduced; the method is favorable for solving windage yaw and pollution flashover accidents of the power transmission line and improving the safe operation level of the line; the fire resistance of the cross arm is improved, and the normal operation of the transmission line is guaranteed; the mechanical property of the cross arm is improved, and the stability and the service life of the transmission tower are ensured. The composite cross arm has the characteristics of portability, easiness in processing and forming, easiness in going up to the tower and assembling and the like, so that the transportation and assembly cost of the tower can be reduced; the characteristics of corrosion resistance, high and low temperature resistance, high strength and low possibility of being stolen of the composite material are utilized, so that the operation and maintenance cost of the line can be reduced; meanwhile, the composite cross arm is adjustable in color, non-toxic and reusable after being scrapped, so that the environmental friendliness of the line is enhanced. Therefore, from the viewpoints of reliability and stability of safe operation of the power transmission line and environmental protection, development of research and application of the composite cross arm is very necessary for an environment-friendly, safe and reliable power transmission system.
The existing three-pull one-press cross arm structure system has the following defects: 1. the middle insulation pull rod is connected to the middle part of the tower body angle steel, and the angle steel is unreasonable in stress; 2. the lateral insulating pull rod is connected to the angle steel component which extends out transversely, so that although effective transmission of force is guaranteed, the steel consumption of the power transmission tower and the width of a corridor are increased due to the fact that the extending components exist on two sides; 3. the post insulator is connected on the body of the tower angle steel, and the angle steel middle part lacks the support, easily leads to the component to become invalid.
Disclosure of Invention
Not enough to prior art existence, the utility model aims at providing a simple structure, atress are reasonable, the appearance is pleasing to the eye, construction convenience, and has the 110kV drum type double loop composite cross arm tower of stable support, and this tower can reduce the corridor width, and is environment-friendly, reduces windage yaw flashover accident, reduces engineering cost.
In order to realize the technical problem, the utility model discloses a following technical scheme realizes:
the utility model provides a 110kV drum type double-circuit composite cross arm tower, includes the body of the tower, is located ground wire support and the cross arm at body of the tower top, the body of the tower is the drum type, the cross arm is composite cross arm, including last composite cross arm, well composite cross arm and lower composite cross arm, upward composite cross arm, well composite cross arm and lower composite cross arm arrange from last to down in proper order to be connected with the body of the tower through post insulator and cable-stayed insulator.
Furthermore, the upper phase composite cross arm, the middle phase composite cross arm and the lower phase composite cross arm are all composed of a post insulator and five diagonal insulators.
Further, the post insulator is fixed on the tower body through a connecting piece at the end part of the tower; the inclined pull insulator is connected to the post insulator and the L-shaped connecting plate of the tower body through an annular connecting piece.
Furthermore, the post insulator is connected with the double-spliced angle steel through a tower end connecting piece.
Further, set up the cross section vaulting pole and pass through the bolt with the double pin angle steel and link to each other, set up angle steel lacing bar and link to each other with cross section vaulting pole and tower body angle steel lacing bar for the bolt respectively.
Furthermore, the cable-stayed insulator is composed of two independent pull rods and a combined pull rod body.
Furthermore, the combined pull rod body consists of two half pull rods and a long pull rod which are connected in a V shape in space, and further, the two half pull rods and the long pull rod are connected through an annular structure.
The utility model discloses except that compound cross arm post insulator and compound cross arm draw the insulator to one side for combined material, all the other structural component are angle steel or steel member.
Furthermore, the cable-stayed insulator is a flexible part, and the composite material adopts glass fiber reinforced plastic epoxy resin fibers.
Compared with the prior art, the beneficial effects of the utility model are that:
the tower frame of the utility model is a drum-shaped structure, and has simple structure and beautiful form; the cross arm is composite construction, and the structure is symmetrical, and each component passes through space truss system and transmits the load to the body of the tower node effectively, and transmission tower steel consumption and corridor width can not increase simultaneously.
Meanwhile, the post insulator is connected with the double-spliced angle steel through the connecting piece at the end part of the tower, and the stress of the angle steel is reasonable. Set up cross section vaulting pole and pass through the bolt with the double pin angle steel and link to each other, the angle steel middle part provides the support, and the reliability is high.
Compare with conventional drum type angle steel tower, owing to replaced the steel cross arm, cancelled the insulator chain that dangles with compound cross arm, the utility model discloses make breathing out of iron tower high and reduce about 4.5m, the tower height reduces about 5.5m, and line corridor width reduces about 13.5%, and the tower weight reduces about 15%, and whole cost reduces about 13%.
Drawings
Fig. 1 is a single line diagram of the composite cross arm tower of the present invention.
Fig. 2 is a front view of the middle phase composite cross arm structure of the utility model.
Fig. 3 is a top view of the middle phase composite cross arm structure of the present invention.
Fig. 4 is a load-displacement curve diagram at the control point of the present invention.
Fig. 5 is a displacement cloud chart of the cross arm structure system of the present invention.
Fig. 6 is a stress cloud diagram of the cross arm structure system of the present invention.
Fig. 7 is a stress cloud chart of the composite material of the present invention.
Fig. 8 is a schematic structural diagram of an angle iron cross arm drum-type transmission tower.
The meaning of each reference number in the figures is:
1-upper phase composite cross arm post insulator; 2-middle phase composite cross arm post insulator; 3-lower phase composite cross arm post insulator; 4-upper phase composite cross arm diagonal tension insulator; 5-middle phase composite cross arm diagonal tension insulator; 51-independent pull rod; 52-long pull rod; 53-two-part pull rod; 6-lower phase composite cross arm diagonal tension insulator; 7-a ground wire bracket; 8-a tower body; 9-sleeve the end of the post insulator wire; 10-end sleeve of the post insulator tower; 11-a ring-shaped connector; 12-a ring-shaped structure; 13-wire clamping hardware; 14-tower end connections; 15-double angle steel; 16-cross section struts; 17-angle iron lacing bar; 18-column angle iron batten strip; 19-L-shaped connecting plates; 20-bolt.
The following detailed description of the present invention is provided in connection with the accompanying drawings and the detailed description of the invention.
Detailed Description
The following embodiments of the present invention are given, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means that the terms are defined with reference to the drawing plane of the corresponding drawing, and "inner" and "outer" mean that the terms are inner and outer relative to the outline of the corresponding part.
As shown in fig. 1, the utility model discloses a 110kV drum type double-circuit composite cross arm tower, including two sets of three-phase combined material cross arms, two sets of steel ground wire support 7 and angle steel body of the tower 8. Specifically, the utility model discloses a post insulator passes through pylon end connection 14 to be fixed on body of the tower 8, draws the insulator to one side to pass through annular connecting piece 11 to be fixed on body of the tower 8, and ground wire support 7 is located the top of the tower. Except that the composite cross arm post insulator and the composite cross arm cable-stayed insulator are made of composite materials, other structures are angle steel or steel connecting pieces. The utility model discloses a combined material is glass fiber reinforcement epoxy resin based combined material.
Specifically, the utility model discloses a compound cross arm structure all includes that a FRP combined material post insulator, five combined material draw the insulator to one side. Further, as shown in fig. 2, the post insulators are connected with the double-pin angle iron 15 through the tower end connecting piece 14 by bolts 20; in the cable-stayed insulator, an independent pull rod 51 is respectively connected with a double-pin angle iron 15 and a post insulator wire end sleeve 9 through an annular connecting piece 11, a long pull rod 52 and a two-part pull rod 53 are connected into a combined pull rod body through an annular structure 12, and the combined pull rod body is respectively connected with the post insulator wire end sleeve 9 and an L-shaped connecting plate 19 at a tower body through the annular connecting piece 11.
Specifically, the utility model discloses a double pin angle steel 15, cross section vaulting pole 16, angle steel lacing bar 17, tower body angle steel lacing bar 18 and L type connecting plate 19 etc. all regard as a part of tower body 8. Further, as shown in fig. 3, the post insulators on the left and right sides are on the same horizontal line, a cross-section strut 16 is connected to the middle of the post insulators, an angle iron batten 17 is additionally arranged on each of the two sides of the middle of the cross-section strut 16, and all the components are connected through bolts 20.
Specifically, the 110kV drum-type double-loop composite cross arm tower is a space truss system, and other structural components except the cross arm are steel components; the stress principle is simple, the composite post insulator mainly bears pressure under the normal operation condition, and can bear partial tension and partial pressure under the condition of strong wind or uneven snow pressure; the diagonal insulator bears tension and can effectively share the force acting on the post insulator; the whole cross arm system is simple in force transmission, the force on each component can be effectively transmitted to the joint of the tower body, and the whole tower is reasonable in stress.
The utility model discloses take two half pull rods three to draw one to press the combined material atress of cross arm structure is simulated through establishing finite element model below:
(1) model building
Adopt finite element software ABAQUS 2019 right the utility model discloses carry out finite element simulation analysis, establish the three of taking two half pull rods and draw a pressure cross arm structural model.
The steel material adopts Q355B, and the yield strength is taken as fv355MPa, 206000MPa, and 0.3V is taken as Poisson's ratio; the basic mechanical parameters of the FRP composite material are shown in Table 1, and the ultimate strength is 400 MPa; the applied loads are shown in table 2.
TABLE 1 FRP material basic mechanical property parameter table
TABLE 2 line break conditions
(2) Analysis of results
As shown in fig. 4, the load-displacement curve of the node is obtained from the curve, and the control point displacement is about 41mm and the structure deformation is small under the load (66.92kN) which is 1.2 times of the margin load. The displacement cloud chart of the cross arm structure system under the load of 1.2 times of the abundance is shown in figure 5. As can be seen from fig. 6, all components of the crossarm structure are in the elastic stress phase. As can be seen from FIG. 7, the compression columns and the tension rods made of the composite material are in the elastic stage, which shows that the FRP composite material is better stressed. To sum up, the utility model discloses a whole displacement of structure and combined material stress all satisfy the designing requirement within the within range that the standard allows.
According to the 110kV drum-type double-loop composite cross arm tower realized according to the technical scheme, the FRP composite material main material is fixedly connected with the steel sleeve through epoxy resin, namely the steel sleeve is connected, the deformation of the FPR component is limited by the connection, the bearing capacity of the node is improved, the force transmission is reliable, and the connection is convenient. The FRP composite insulator cross arm system and the tower frame are connected into a whole through bolts to form the latticed composite material drum-shaped tower which is simple in structural form and attractive in appearance.
The utility model discloses on the basis of traditional angle steel transmission tower, do not change the main part form of body of the tower, reform transform the superstructure of tower head. The concrete expression is, replace former angle steel cross arm for FRP combined material cross arm, according to the peculiar insulating characteristics of compound cross arm, improved the junction of cross arm and body of the tower, remedied the not enough of material rigidity through structural design, accomplished the perfect adaptation of compound cross arm and angle steel tower main part, be convenient for popularize and apply in the transmission line.
The various features described in the foregoing detailed description can be combined in any suitable manner without departing from the spirit of the invention, and should also be construed as disclosed in the invention.
Claims (9)
1. The utility model provides a 110kV drum type double-circuit composite cross arm tower, includes body of the tower (8), is located ground wire support (7) and the cross arm at body of the tower (8) top, body of the tower (8) is the drum type, a serial communication port, the cross arm is composite cross arm, including last composite cross arm, well composite cross arm and the lower composite cross arm of phase, upward composite cross arm, well composite cross arm and the lower composite cross arm of phase arrange from last to down in proper order to be connected with body of the tower (8) through post insulator and oblique-pull insulator.
2. The 110kV drum-type double-circuit composite cross arm tower of claim 1, wherein the upper phase composite cross arm, the middle phase composite cross arm and the lower phase composite cross arm are each composed of one post insulator and five diagonal insulators.
3. A 110kV drum-type double-circuit compound cross-arm tower as claimed in claim 1, wherein the post insulator is fixed to the tower body (8) by a tower end connection (14); the diagonal insulator is connected to the post insulator and the L-shaped connecting plate (19) of the tower body through an annular connecting piece (11).
4. A 110kV drum-type double-circuit compound cross-arm tower as claimed in claim 3, wherein the post insulators are connected to the double pin angles (15) by tower end connectors (14).
5. The 110kV drum-type double-circuit composite cross arm tower as claimed in claim 4, wherein a cross-section brace (16) is provided to be connected to the double pin angle (15) by a bolt (20), and an angle batten strip (17) is provided to be connected to the cross-section brace (16) and a tower body angle batten strip (18) by a bolt (20), respectively.
6. The 110kV drum-type double-circuit composite cross arm tower as claimed in claim 2, wherein the cable-stayed insulator (5) is composed of two independent pull rods (51) and a combined pull rod body.
7. The 110kV drum-type double-circuit compound crossarm tower as claimed in claim 6, wherein the twist beam body is composed of two half beams (53) and a long beam (52) which are connected in a V-shape in space, and further, the half beams (53) and the long beam (52) are connected through a ring structure (12).
8. The 110kV drum-type double-circuit composite cross arm tower as claimed in claim 1, wherein the other structural members are angle steel or steel members except that the composite cross arm post insulators and the composite cross arm cable-stayed insulators are made of composite materials.
9. The 110kV drum-type double-circuit composite cross arm tower as claimed in claim 8, wherein the cable-stayed insulator is a flexible member, and the composite material is glass fiber reinforced plastic epoxy resin fiber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021521807.7U CN212376389U (en) | 2020-07-28 | 2020-07-28 | 110kV drum type double-loop composite cross arm tower |
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| CN202021521807.7U CN212376389U (en) | 2020-07-28 | 2020-07-28 | 110kV drum type double-loop composite cross arm tower |
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| CN212376389U true CN212376389U (en) | 2021-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852156A (en) * | 2020-07-28 | 2020-10-30 | 国网甘肃省电力公司经济技术研究院 | 110kV drum type double-loop composite cross arm tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852156A (en) * | 2020-07-28 | 2020-10-30 | 国网甘肃省电力公司经济技术研究院 | 110kV drum type double-loop composite cross arm tower |
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