WO2018223829A1 - 复合横担及输电杆 - Google Patents

复合横担及输电杆 Download PDF

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Publication number
WO2018223829A1
WO2018223829A1 PCT/CN2018/087362 CN2018087362W WO2018223829A1 WO 2018223829 A1 WO2018223829 A1 WO 2018223829A1 CN 2018087362 W CN2018087362 W CN 2018087362W WO 2018223829 A1 WO2018223829 A1 WO 2018223829A1
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WO
WIPO (PCT)
Prior art keywords
sleeve
rod
rod body
fixed
bearing member
Prior art date
Application number
PCT/CN2018/087362
Other languages
English (en)
French (fr)
Inventor
马斌
郁杰
李德权
方江
Original Assignee
江苏神马电力股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏神马电力股份有限公司 filed Critical 江苏神马电力股份有限公司
Priority to CA3025358A priority Critical patent/CA3025358C/en
Priority to ES18804217T priority patent/ES2958770T3/es
Priority to EP18804217.0A priority patent/EP3461972B1/en
Priority to BR112019025922-8A priority patent/BR112019025922A2/pt
Priority to NZ748819A priority patent/NZ748819B2/en
Priority to AU2018271335A priority patent/AU2018271335B9/en
Priority to US16/304,997 priority patent/US11421437B2/en
Publication of WO2018223829A1 publication Critical patent/WO2018223829A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/24—Cross arms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
    • E04H12/02—Structures made of specified materials
    • E04H12/08—Structures made of specified materials of metal
    • E04H12/10—Truss-like structures

Definitions

  • the invention relates to the field of power transmission insulation equipment, and more particularly to a composite cross arm and a power transmission rod.
  • the crossbar for transmission lines is an important supporting structure for the transmission poles, which is used to support the conductors, lightning conductors, etc., and maintain a certain safety distance according to regulations.
  • the transmission lines of the voltage level of 35kV and below are widely used for metal crossarms such as iron crossarms and steel crossarms.
  • the metal crossarms are heavy in weight and poor in insulation, which easily causes flashover problems.
  • a composite crossarm which is usually composed of an insulating mandrel and an umbrella skirt fixed on the insulating mandrel.
  • the two ends of the composite crossarm disclosed in CN106088785A are provided with a hanging wire fitting, and the middle portion of the composite crossarm is fixedly connected with the rod body of the power transmission rod, and the fixed connection manner is to punch holes in the composite cross arm, using the hoop and fastening
  • the composite crossarm is fixed on the transmission pole, but perforating the composite crossarm will seriously affect its mechanical properties and reduce its bearing capacity.
  • the object of the present invention is to provide a composite cross arm and a power transmission rod to solve the problem that the existing cross body and the pole of the power transmission rod have an influence on the mechanical performance of the composite cross arm, thereby reducing the load bearing capacity.
  • a composite cross arm is provided, and the composite cross arm is fixed on a rod of a power transmission rod, and the composite cross arm includes:
  • the mandrel, the insulating layer and the bearing member, the insulating layer and the bearing member are all coated and fixed on the outer peripheral surface of the mandrel, the bearing member is located in the middle of the connection between the mandrel and the rod body, and the insulating layer is located in other regions except the middle portion.
  • the fixed load between the two is directly applied to the bearing member instead of being applied to the core.
  • the mandrel does not need to be perforated, the mandrel itself will not be deformed, and the insulation layer will not be worn due to long-term stress.
  • the mandrel covered by the insulation layer will not be exposed to the air, avoiding the external environment.
  • the mandrel is corroded, and the bearing member has sufficient strength, which itself is not damaged by long-term stress, thereby ensuring the mechanical properties of the composite cross arm;
  • the bearing member and the insulating layer are located in different regions of the mandrel, and are all coated and fixed on the outer peripheral surface of the mandrel, so that the mandrel is not corroded by the external environment, and the influence on the mechanical properties of the composite crossarm is also avoided. ;
  • the bearing member is located in the middle of the connection between the mandrel and the rod body.
  • the insulating layer and the bearing member are sealed.
  • the sealing connection between the insulating layer and the bearing member can further prevent the corrosion of the mandrel by the external environment such as moisture, and reduce the influence on the mechanical properties of the composite cross arm.
  • the insulating layer is a shed and/or a sheath, and the shed and/or the sheath are sealingly connected to the bearing member.
  • the insulating layer is coated and fixed on the core rod except for the middle portion.
  • the bearing member is firstly coated and fixed on the middle of the mandrel, and then the outer insulating layer is coated on the outer side of the mandrel to make the production process simple and beneficial to the insulating layer and The connection between the bearing members.
  • the bearing member is a sleeve, and the inner wall shape of the sleeve is matched with the cross section of the mandrel covered.
  • the sleeve is formed by a metal stamping process.
  • the metal stamping process is simple and low in cost, and can facilitate the punching of various shapes of cross sections, and has strong adaptability and meets the requirements of different cross sections of the mandrel.
  • the composite cross arm is fixed on the rod body by a fixing device.
  • the fixing device comprises a cross arm receiving member and a rod connecting member, the cross arm receiving member is for receiving the sleeve, and the rod connecting member is used for connecting the rod body and the lateral load receiving member.
  • the cross arm accommodating member comprises a cross arm hoop and a connecting plate
  • the rod connecting piece is a rod body hoop
  • the connecting plate is provided with a first mounting matched with the cross arm hoop
  • the cross arm hoop is fixed by the first installation after the circumferential half of the sleeve encloses the sleeve
  • the rod hoop is fixed by the second installation after surrounding the rod body along the circumferential half of the rod body.
  • the side of the connecting plate facing the rod body is provided with an arc-shaped member adapted to the rod body.
  • the cross-member accommodating member includes a accommodating portion and a first connecting piece disposed on the accommodating portion, the shank connecting member comprises a hoop and a second connecting piece disposed on the hoop, and the accommodating portion is used for accommodating the sleeve
  • the sleeve, the hoop sleeve and the rod body, the first connecting piece and the second connecting piece are fixed by fasteners.
  • the bearing member is a sleeve mechanism
  • the sleeve mechanism comprises a sleeve and a connecting plate
  • the sleeve is coated and fixed on the outer peripheral surface of the mandrel
  • the connecting plate is fixed on one side of the sleeve
  • the connecting plate is used for the rod body Make a connection.
  • a connecting plate is arranged on one side of the sleeve, and the connecting plate is directly connected with the rod body, and the bearing member is used to realize the lateral load side fixing function, thereby simplifying the assembly process and reducing the installation complexity.
  • a power transmission rod including a rod body and the above-mentioned composite cross arm fixed to the rod body.
  • 1 to 5 are schematic views of a first embodiment of the present invention
  • FIG. 1 is a schematic structural view of a composite crossarm 10
  • Figure 2 is a schematic structural view of the sleeve 103 of Figure 1;
  • FIG. 3 is a schematic structural view of the composite cross arm 10 mounted to the rod body 12 by the fixing device 11;
  • FIG. 4 is a perspective view of the lateral accommodating member 110
  • FIG. 5 is a schematic structural view of the curved member on the lateral accommodating member 110.
  • 6 to 8 are schematic views of a second embodiment of the present invention.
  • Figure 6 is a schematic structural view of the fixing device 21
  • FIG. 7 is a schematic structural view of a lateral accommodating member 210
  • FIG. 8 is a schematic structural view of the rod connector 211.
  • FIG. 9 is a schematic structural view of a composite crossarm 30
  • Figure 10 is a schematic structural view of a sleeve mechanism 303
  • FIG. 11 is a schematic view showing the structure of the composite cross arm 30 connected to the rod body 32.
  • FIG. 12 is a schematic structural view of a composite crossarm 40
  • Figure 13 is a schematic structural view of a sleeve mechanism 403
  • Figure 14 is a schematic view showing the structure of the rod connecting plate 43;
  • Figure 15 is a schematic view showing the structure in which the composite crossarm 40 is attached to the rod 42.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the composite cross arm 10 includes a core rod 101 , an insulating layer 102 , and a bearing member 103 .
  • the insulating layer 102 and the bearing member 103 are both coated and fixed on the outer peripheral surface of the core rod 101 , and the bearing member 103 is located.
  • the insulating layer 102 is located in other areas than the middle portion.
  • the mandrel 101 is a main component of the composite crossarm 10 and needs to have sufficient supporting strength.
  • the glass fiber and the resin are mixed and then pultrusion.
  • the glass fiber and the resin may be mixed and molded. Or other process molding, this is not limited.
  • the resin may be selected from polyurethane, epoxy or vinyl.
  • the mandrel 101 may be a solid body or a tube body having at least one chamber.
  • the cross-sectional shape of the mandrel 101 may be selected from a circular shape, a polygonal shape or an I-shaped shape, and may be selected as needed in practical engineering applications.
  • the mandrel 101 of the present embodiment has a solid rectangular structure.
  • the mandrel 101 is exposed to the air for a long time, and is easily corroded by various natural factors such as light, electricity, water, acid, etc., causing a decrease in strength due to surface aging, and therefore it is usually necessary to treat the surface of the mandrel 101.
  • the method is to coat the surface of the mandrel 101 with the insulating layer 102, which can further improve the insulation performance of the mandrel 101 and/or function as an anti-corrosion.
  • the insulating layer 102 may be an umbrella skirt 1021 and a sheath 1022 extending to the mandrel 101, or directly a sheath 1022 coated on the surface of the mandrel 101.
  • the umbrella skirt 1021 or the sheath 1022 may be molded and vulcanized.
  • the insulating layer 102 has good water repellency and aging resistance and high service life.
  • the insulating layer 102 does not have the ability to withstand loads. If the load acts directly on the insulating layer 102, the insulating layer 102 is easily cracked or peeled off, so that the mandrel 101 is exposed to the air, the strength is lowered, and the mechanical properties are degraded.
  • a bearing member 103 is preset at a portion where the mandrel 101 and the rod body 12 are connected, and the bearing member 103 is usually a metal bearing member 103, and of course, other strengths are not excluded.
  • the material bearing member 103 can be directly connected to the rod body 12 or connected by an additional fixing device 11. No matter which connection method, the mandrel 101 is not required to be punched to realize the connection and fixing.
  • the connected loads are directly applied to the bearing member 103, and are transmitted to the mandrel 101 through the bearing member 103 without causing damage to the insulating layer 102 to expose the outer peripheral surface of the mandrel 101 to the air.
  • the bearing member 103 may be a sleeve 103.
  • the sleeve 103 is a hollow structure with open ends.
  • the inner wall shape of the sleeve 103 is adapted to the cross-sectional shape of the mandrel 101 and is rectangular.
  • the sleeve 103 can be formed by metal stamping process, the flow is simple, the cost is low, the section of various shapes can be easily punched, the adaptability is strong, and the requirements of different cross sections of the mandrel are met; the sleeve 103 can also be selected as a steel profile. Steel Pipe.
  • the sleeve 103 is fixed to the middle portion of the mandrel 101 by gluing or crimping, and the middle portion is not limited to the area in the middle of the mandrel 101, and the mandrel 101 is
  • the left and right ends are used to connect a hanging wire fitting or a pin insulator (not shown), and the middle portion refers to the area of the mandrel 101 except for the two ends.
  • the shed skirt 1021 and the sheath 1022 are injection molded on the mandrel 101 on both sides of the sleeve 103, and the shed skirt 1021 and the sheath 1022 on each side are integrally injection molded, and the injection molding of the shed skirt 1021 and the sheath 1022 can be avoided.
  • the sleeve 103 is provided with a flange 1031, the provision of the flange 1031 facilitates the sealing connection between the sleeve 103 and the sheath 1022.
  • the hanging wire fitting can be fixed to the end by glue or crimping, and then the sleeve is removed.
  • the injection molding is performed on the mandrel 101 at the 103 and the hanging wire fitting.
  • the umbrella skirt 1021 and the sheath 1022 are injection molded on the surface of the end region, and the setting of the hanging wire fitting or the pin insulator can satisfy the requirement, and will not be specifically discussed herein.
  • the sleeve 103 is fixed in the middle of the mandrel 101 and covers all the outer peripheral faces of the central portion.
  • the shed 1021 and the sheath 1022 cover all the outer peripheral faces of the mandrel 101 except for the middle and the ends, and the sleeve 103
  • a sealed connection is made between the shed skirt 1021 and the sheath 1022 such that the mandrel 101 is wrapped within the sleeve 103 and the sheath 1022 from corrosion by the external environment.
  • the composite cross arm 10 is fixed on the rod body 12 by an additional fixing device 11, and the fixing device 11 includes a cross arm receiving member 110 and a rod connecting member 111.
  • the cross arm housing member 110 is used for The sleeve 103 is received, and the rod connector 111 is used to connect the rod body 12 and the cross member 110.
  • the cross arm housing 110 includes a cross arm hoop 1101 and a connecting plate 1102.
  • the cross arm hoop 1101 includes two U-shaped hoops 1101 on the left and right sides of the rod body 12, and the connecting plate 1102 is a rectangular panel; the rod body connecting member 111
  • the rod body hoop 111 includes two U-shaped hoops 111 on the upper and lower sides of the composite cross arm 10; four connecting holes 1103 corresponding to the cross arm hoops 1101 are provided on the connecting plate 1102, and corresponding
  • the four mounting holes 1104 of the rod hoop 111 are provided with an arc-shaped member 1105 on the side of the connecting plate 1102 facing the rod body 12.
  • the curvature of the curved member 1105 is adapted to the outer surface of the rod body 12, and the curved member 1105 can increase the connection.
  • the contact area of the plate 1102 with the rod 12 makes the fixing more stable.
  • the U-shaped hoop 1101 includes a rectangular hoop 1107 and two portions of a cylindrical member 1108 fixed to the rectangular hoop 1107.
  • the rectangular hoop 1107 is adapted to the shape of the sleeve 103, and the cylindrical member 1108 is worn. After the hole 1103 is installed, it is fixed by a bolt.
  • the composite cross arm 10 and the cross arm hoop 1101 can be installed first, that is, the two U-shaped hoops 1101 surround the sleeve 103 along the circumferential direction of the sleeve 103, and then pass through the mounting hole 1103 and use bolts.
  • the composite cross arm 10 is in the proper position on the rod body 12, the two U-shaped hoops 111 are fixed through the mounting holes 1104 of the connecting plate 1102 to fix the composite cross body 10 to the rod body 12.
  • the U-shaped hoop 1101 is fixed on the sleeve 103. During long-term operation, the U-shaped hoop 1101 may slide to the left and right on the sleeve 103, and when it slides to the edge of the sleeve 103, the sheath 1022 may be damaged. In order to avoid such sliding, a groove (not shown) corresponding to the position of the U-shaped hoop 1101 on the sleeve 103 may be provided to serve as a limit.
  • both ends of the composite cross arm 10 can be used for supporting the wires, so that the arrangement of at least two phase wires can be realized.
  • the middle of the composite crossarm 10 can also be provided with a hanging wire fitting or a pin insulator to support the wire.
  • the composite crossarm 10 is convenient to install and simplifies the complexity of the upper-air operation;
  • the composite crossarm 10 described above is generally used in voltage fields of 35 kV and below, such as 10 kV, 20 kV or 35 kV distribution lines.
  • the middle portion of the composite cross arm 10 and the rod body 12 is connected, and the load acts directly on the sleeve 103.
  • the sleeve 103 has sufficient supporting strength to avoid affecting the mechanical properties of the mandrel 101.
  • the insulating layer may also be coated with an anticorrosive functional layer on the outer peripheral surface of the mandrel, such as a fluorocarbon lacquer, and the fluorocarbon lacquer is coated on other parts of the mandrel except the bearing member, of course,
  • an anticorrosive functional layer on the outer peripheral surface of the mandrel, such as a fluorocarbon lacquer, and the fluorocarbon lacquer is coated on other parts of the mandrel except the bearing member, of course,
  • the fluorocarbon paint can also be applied on the outer peripheral surface of the bearing member, so that the fluorocarbon paint and the bearing member are in seamless contact;
  • the anticorrosive functional layer also has no ability to bear the load, if the load directly acts on the anticorrosive function On the layer, it is easy to cause it to fall off, so that the mandrel is exposed to the air, the strength is lowered, and the mechanical properties are degraded.
  • the sleeve may be provided with grooves or projections to limit the cross-member housing placed on the sleeve.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the structure of the composite crossarm is similar to that of the first embodiment, and details are not described herein again.
  • the difference is that when the composite crossarm is fixed to the shaft by a fixing device, the fixing device is different.
  • the fixing device 21 includes a lateral accommodating member 210 and a rod connecting member 211.
  • the cross-member accommodating member 210 includes a accommodating portion 2101 and a connecting piece 2102 located at two sides of the accommodating portion 2101.
  • the accommodating portion 2101 is for accommodating the sleeve 103 on the composite cross arm 10, and the connecting piece 2102 is for connecting the rod connecting member 211.
  • the accommodating portion 2101 is a housing having a hollow rectangular cross section, and the inner wall of the housing is matched with the outer surface of the composite cross arm to be accommodated.
  • the inner cavity section of the housing can also be circular or other polygonal.
  • the rod connector 211 includes a U-shaped hoop 2110 and a connecting piece 2111 connected to both sides of the U-shaped hoop 2110.
  • the U-shaped hoop 2110 is for receiving the rod body 12, and the inner surface of the U-shaped hoop 2110 is in conformity with the surface of the rod body 12 it accommodates.
  • Four mounting holes 2112 are provided in the connecting piece 2111, and four mounting holes 2103 corresponding to the connecting piece 2111 are provided on the connecting piece 2102.
  • the composite cross arm is fixed to the rod by the fixing device 21.
  • the sleeve 103 is located in the accommodating portion 2101.
  • the accommodating portion 2101 partially surrounds the composite cross arm along the outer peripheral surface of the sleeve.
  • the U-shaped hoop 2110 partially surrounds the rod body, and the fastener 212 passes through the connecting piece 2111 and the corresponding hole on the connecting piece 2102.
  • the shaft connector 211 is coupled to the cross arm receptacle 210, and the fastener 212 can be a bolt.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the composite crossarm 30 includes a core rod 301, an insulating layer 302, and a bearing member 303.
  • the core rod 301 is a hollow rectangular tube body, and the core rod 301 is filled with polyurethane foam;
  • the insulating layer 302 is a silicone rubber shed 3021 and a sheath 3022 integrally molded on the core rod 301;
  • the bearing member 303 is a sleeve mechanism 303.
  • the metal material comprises a sleeve 3031 and a connecting plate 3032.
  • the sleeve 3031 is fixed to the outer peripheral surface of the core rod 301.
  • the connecting plate 3032 is fixed to one side of the sleeve 3031, and the connecting plate 3032 is used for the rod body. 32 to connect.
  • the sleeve mechanism 303 is fixed to the mandrel 301 by gluing or crimping, so that the sleeve 3031 covers all the outer peripheral faces of the middle portion of the mandrel 301, and the sleeve 3031
  • the two sides are respectively integrally molded with a silicone rubber shed 3021 and a sheath 3022.
  • the sleeve 3031 is provided with a flange 3034. The arrangement of the flange 3034 facilitates the sealing connection with the sheath 3022.
  • a connecting plate 3032 is disposed on one side of the sleeve 3031 toward the rod body 32.
  • the connecting plate 3032 may be integrally molded with the sleeve 3031 or fixed to the sleeve 3031 by welding or bonding.
  • the connecting plate 3032 is connected to the rod 32 through the rod connecting member 31.
  • the rod connecting member 31 includes a U-shaped hoop 31 on the upper and lower sides of the composite cross arm 30, and the U-shaped hoop 31 is sleeved on the upper portion of the rod 32 to surround the rod 32.
  • the outer peripheral surface, the connecting plate 3032 is provided with four mounting holes 3033 that cooperate with the U-shaped hoop 31. After the U-shaped hoop passes through the mounting hole 3033, the U-shaped hoop is fastened by bolts, so that the composite supports the cross arm 30 on the rod body 32. .
  • the composite cross arm 30 is fixed on the rod body 32. During long-term operation, the load of the joint portion of the rod body 32 and the composite cross arm 30 acts on the sleeve 3031 without causing damage to the insulating layer 302, and avoiding the external environment against the mandrel 301. Corrosion.
  • the connecting plate 3032 can be provided with an arc-shaped member, and the curved member is welded on the connecting plate 3032, and the force receiving area can be increased when the connecting rod is connected, so that the fixing is more stable.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the composite crossarm 40 includes a core rod 401, an insulating layer 402, and a bearing member 403.
  • the mandrel 401 is a solid circular rod
  • the insulating layer 402 includes an integrally injection molded silicone rubber shed 4021 and a sheath 4022.
  • the bearing member 403 is a sleeve mechanism 403, usually made of metal, including a sleeve 4031 and a connecting plate. 4032, the sleeve 4031 is coated and fixed on the outer circumferential surface of the mandrel 401, and the connecting plate 4032 is provided with an arcuate card slot, and the sleeve 4031 is engaged in the card slot of the connecting plate 4032 by welding.
  • the sleeve mechanism 403 is fixed to the mandrel 401 by gluing or crimping, so that the sleeve 4031 covers all the outer peripheral faces of the middle portion of the mandrel 401, and the sleeve 4031
  • the two sides are respectively integrally molded with a silicone rubber shed 4021 and a sheath 4022.
  • the sleeve 4031 is provided with a flange 4034. The arrangement of the flange 4034 facilitates the sealing connection with the sheath 4022.
  • the connecting plate 4032 can be directly connected to the rod body 42.
  • a U-shaped hoop is arranged on the rod body 42, and the U-shaped hoop is passed through the connecting hole on the connecting plate 4032, and then connected by bolts.
  • another pole connecting plate 43 is disposed between the connecting plate 4032 and the rod body 42 .
  • the connecting plate 4032 is provided with a mounting hole 4033 and the rod body.
  • the connecting plate 4032 can be fixed to the rod connecting plate 43 by bolts, that is, the composite cross arm 40 is fixed to the rod connecting plate 43.
  • the rod connecting plate 43 is further provided with a mounting hole 432 for connecting with the U-shaped hoop 44.
  • the side of the rod connecting plate 43 near the rod 42 is provided with an arc-shaped member 435, which can increase the contact area with the rod 42. Make the fixing more stable.
  • the composite cross arm 40 is placed on the rod body 42, and the U-shaped hoop 44 half surrounds the rod body 42, passes through the mounting hole 432, and is fixed by a nut, so that the composite cross arm 40 is fixed to the rod body 42.
  • the top end of the rod connecting plate 43 is further provided with an extended ear piece 433.
  • the ear piece 433 is provided with a mounting hole 434, and the mounting hole 434 can be used for connecting with the top phase cross arm to realize the arrangement of the single-phase three-phase wire. Specific discussion.
  • the composite cross arm 40 is fixed on the rod body 42 and does not need to be perforated on the composite cross arm 40. During long-term operation, the load of the joint portion of the rod body 42 and the composite cross arm 40 acts on the sleeve mechanism 403 without the insulating layer. 402 causes damage and avoids corrosion of the mandrel 401 by the external environment.
  • the bearing member is provided as a sleeve or a sleeve mechanism, and the advantage of the sleeve is that the sleeve and the mandrel are seamlessly connected, and the sleeve has no punching arrangement, which is better.
  • the bearing member to the sleeve type mechanism, for example, replacing the sleeve with two hoops on the mandrel, and the two hoops
  • the fastening by bolts can also achieve the effect of covering and fixing. Although the anti-corrosion effect is somewhat weakened, it is also within the scope of the present invention.

Abstract

本发明公开一种复合横担，该复合横担固定在输电杆的杆体上，复合横担包括：芯棒、绝缘层及承力件，绝缘层及承力件均包覆固定于芯棒的外周面，承力件位于芯棒与杆体连接的中部，绝缘层位于除中部外的其他区域。本发明还公开一种应用上述复合横担的输电杆。通过上述方式，在芯棒与杆体连接的部位预设一承力件，一方面芯棒无需通过打孔的方式实现与杆体的连接，另一方面固定连接的荷载直接作用于承力件上，不会对绝缘层造成损坏，承力件和绝缘层均包覆固定在芯棒的外周面，避免外部环境对芯棒的腐蚀，保证复合横担的力学性能。

Description

复合横担及输电杆 技术领域
本发明涉及一种输电绝缘设备领域，更具体地涉及一种复合横担及输电杆。
背景技术
在电力设备领域，输电线路用的横担是输电杆重要的配套结构件，用于支承导线、避雷线等，并使之按规定保持一定的安全距离。目前35kV及以下电压等级的输电线路中广泛使用的多为铁横担、钢横担等金属横担，金属横担质量重，绝缘性差，易造成闪络问题。
为了解决金属横担的上述问题，发展一种复合横担，复合横担通常是由绝缘芯棒及固定在绝缘芯棒上的伞裙组成。CN106088785A中揭示的复合横担的两端设有挂线金具，复合横担的中间部位与输电杆的杆体相固定连接，固定连接的方式是在复合横担上打孔，利用抱箍和紧固件将该复合横担固定在输电杆上，但是在复合横担上打孔会严重影响其力学性能，降低其对荷载的承受能力。
发明内容
本发明的目的在于提供一种复合横担及输电杆，以解决现有复合横担与输电杆的杆体固定时，会对复合横担的力学性能造成影响，从而降低其荷载承受能力的问题。
为实现上述目的，本发明所采用的技术方案如下：提供一种复合横担，该复合横担固定在输电杆的杆体上，复合横担包括：
芯棒、绝缘层及承力件，绝缘层及承力件均包覆固定于芯棒的外周面，承力件位于芯棒与杆体连接的中部，绝缘层位于除中部外的其他区域。
一方面，通过在芯棒与杆体连接的部位预设一承力件，当复合横担安装在输电杆上时，两者之间固定的荷载直接施加在承力件上，而不是施加在芯棒或绝缘层上，芯棒无需打孔，芯棒本身不会发生变形，绝缘层也不会因为长期受力而磨损，绝缘层包覆的芯棒不会暴露在空气中，避免外部环境对芯棒的腐蚀，而承力件具有足够的强度，其本身不会因为长期受力 而损坏，从而保证了复合横担的力学性能；
另一方面，承力件与绝缘层位于芯棒的不同区域，且均包覆固定在芯棒的外周面，使得芯棒不受外部环境的腐蚀，同样会避免对复合横担力学性能的影响；
再次，承力件位于芯棒与杆体连接的中部，该复合横担与输电杆配合使用时，只需一次安装即可实现复合横担上至少两相导线的排布，相比在杆体两侧分别固定两个完全一样的复合横担，安装工艺简单，降低高空作业的复杂度。
其中，绝缘层与承力件之间为密封连接。
绝缘层与承力件之间密封连接可进一步避免湿气等外部环境对芯棒的腐蚀，降低对复合横担力学性能的影响。
其中，绝缘层为伞裙和/或护套，伞裙和/或护套与承力件密封连接。
其中，承力件包覆固接于芯棒的中部后，使绝缘层在芯棒上除中部外的其他区域包覆固定。
该复合横担的芯棒制作完成后，首先将承力件包覆固接于芯棒的中部后，再在芯棒的外部包覆固定绝缘层，使生产工艺简单，同时有利于绝缘层与承力件之间的连接。
其中，承力件为套筒，套筒的内壁形状与包覆在内的芯棒的横截面相吻合。
其中，套筒为通过金属冲压工艺成型。
金属冲压工艺流程简单、成本较低，可便于冲压各种形状的截面，适应性强，满足芯棒不同横截面的要求。
其中，复合横担通过固定装置固定在杆体上。
其中，固定装置包括横担容置件和杆体连接件，横担容置件用于容置套筒，杆体连接件用于连接杆体和横担容置件。
其中，横担容置件包括横担抱箍和连接板，杆体连接件为杆体抱箍，连接板上设有与横担抱箍配合的第一安装、及与杆体抱箍配合的第二安装；横担抱箍沿套筒的周向半包围套筒后通过第一安装实现固定，杆体抱箍沿杆体的周向半包围杆体后通过第二安装实现固定。
其中，连接板朝向杆体的一侧设有与杆体相适应的弧形件。
其中，横担容置件包括容置部和设于容置部上的第一连接片，杆体连接件包括抱箍和设于抱箍上的第二连接片，容置部用于容置套筒，抱箍套设与杆体上，第一连接片与第二连接片通过紧固件固定。
其中，承力件为套筒机构，套筒机构包括套筒和连接板，套筒包覆固接于芯棒的外周面，连接板固接于套筒的一侧，连接板用于与杆体进行连接。
在套筒一侧设有连接板，利用连接板直接与杆体之间实现连接，利用承力件实现横担侧固定的作用，简化装配流程，降低安装复杂度。
为解决上述技术问题，本发明提供的另一技术方案是：提供一种输电杆，包括杆体和固定在杆体上的上述复合横担。
附图说明
图1至图5是本发明实施例一的示意图，
其中：
图1是复合横担10的结构示意图；
图2是图1中套筒103的结构示意图；
图3是复合横担10通过固定装置11安装到杆体12上的结构示意图；
图4是横担容置件110的立体示意图；
图5是横担容置件110上弧形件的结构示意图。
图6-图8是本发明实施例二的示意图，
其中：
图6是固定装置21的结构示意图；
图7是横担容置件210的结构示意图；
图8是杆体连接件211的结构示意图。
图9-图11是本发明实施例三的示意图，
其中：
图9是复合横担30的结构示意图；
图10是套筒机构303的结构示意图；
图11是复合横担30连接到杆体32上的结构示意图。
图12-图15是本发明实施例四的示意图，
其中：
图12是复合横担40的结构示意图；
图13是套筒机构403的结构示意图；
图14是杆体连接板43的结构示意图；
图15是复合横担40连接到杆体42上的结构示意图。
具体实施方式
根据要求，这里将披露本发明的具体实施方式。然而，应当理解的是，这里所披露的实施方式仅仅是本发明的典型例子而已，其可体现为各种形式。因此，这里披露的具体细节不被认为是限制性的，而仅仅是作为权利要求的基础以及作为用于教导本领域技术人员以实际中任何恰当的方式不同地应用本发明的代表性的基础，包括采用这里所披露的各种特征并结合这里可能没有明确披露的特征。
实施例一：
请一起参阅图1-图5。如图1所示，该复合横担10包括芯棒101、绝缘层102及承力件103，绝缘层102及承力件103均包覆固定于芯棒101的外周面，承力件103位于芯棒101与杆体12连接的中部，绝缘层102位于除中部外的其他区域。
具体地，芯棒101是复合横担10的主要构成要件，需要有足够的支承强度，通常是由玻璃纤维和树脂混合后拉挤成型，当然，也可以由玻璃纤维和树脂混合后模压成型，或采用其他的工艺成型，对此不做限定。树脂可选聚氨酯、环氧树脂或乙烯基树脂等。
芯棒101可以为实心体，或者至少具有一个腔室的管体，芯棒101的截面形状可选圆形、多边形或工字型，实际工程应用中可根据需要进行选择。本实施例的芯棒101为实心矩形的结构。
芯棒101长期暴露在空气中，容易受到各种自然因素如光、电、水、酸等的腐蚀，造成表面老化产生强度降低等现象，因此通常需要对芯棒101的表面进行处理，常用的做法是在芯棒101表面包覆固定绝缘层102，可进一步提高芯棒101的绝缘性能和/或起到防腐蚀的作用。
绝缘层102可选为伞裙1021和延伸到芯棒101上的护套1022，或者直接为包覆在芯棒101表面的护套1022，伞裙1021或护套1022可以采用模压硫化成型的硅橡胶制成，或者采用整体注射成型的硅橡胶制成，该绝缘层102具有良好的憎水性和抗老化性，使用寿命高。
但是该绝缘层102不具有承受荷载的能力，如果荷载直接作用在绝缘层102上，容易导致绝缘层102的开裂或是脱落，从而使得芯棒101暴露在空气中，强度降低，力学性能下降。
因此，本实施例的复合横担10，在芯棒101与杆体12连接的部位预设一承力件103，该承力件103通常为金属承力件103，当然也不排除其他具有足够强度的材料承力件，该承力件103可直接与杆体12连接，或者通过额外的固定装置11进行连接，无论哪一种连接方式，都无需都芯棒101进行打孔设置来实现连接，固定连接的荷载都是直接施加在承力件103上，通过承力件103再传递到芯棒101上，不会对绝缘层102造成损坏而使芯棒101的外周面暴露在空气中。
如图2所示，承力件103可选为套筒103，套筒103为两端开口的中空结构，套筒103的内壁形状适应芯棒101的截面形状，设置为矩形。套筒103可选通过金属冲压工艺成型，流程简单、成本较低，可便于冲压各种形状的截面，适应性强，满足芯棒不同横截面的要求；套筒103也可选为钢制型材钢管。
芯棒101通过拉挤工艺成型后，使套筒103通过胶装或压接的方式固接在芯棒101上的中部，该中部并非限制在芯棒101正中间的区域，该芯棒101的左右两个端部用来连接挂线金具或者针式绝缘子(图中未示出)，中部是指该芯棒101上除两个端部外的区域。
伞裙1021和护套1022在套筒103两侧的芯棒101上注塑成型，每一侧的伞裙1021和护套1022可选一体注塑成型，伞裙1021和护套1022的注塑可避开端部挂线金具处的区域，由于套筒103上设有翻边1031，翻边1031的设置有利于套筒103和护套1022之间的密封连接。
需要说明的是，对于端部区域的芯棒101，可在伞裙1021和护套1022注塑前，使挂线金具通过胶装或压接的方式先固接在端部，再在除套筒103 和挂线金具处的芯棒101上进行注塑。也可选使得伞裙1021和护套1022注塑在端部区域的表面，挂线金具或是针式绝缘子的设置能满足需求即可，在此不做具体讨论。
套筒103固接在芯棒101的中部，并包覆中部全部的外周面，伞裙1021和护套1022包覆芯棒101除中部及端部外的其他区域的全部外周面，套筒103与伞裙1021和护套1022之间密封连接，使得芯棒101被包覆在套筒103和护套1022内，免受外部环境的腐蚀。
请参阅图3-图5，将上述复合横担10通过额外的固定装置11固定在杆体12上，固定装置11包括横担容置件110和杆体连接件111，横担容置件110用于容置套筒103，杆体连接件111用于连接杆体12和横担容置件110。
横担容置件110包括横担抱箍1101和连接板1102，横担抱箍1101包括位于杆体12左右两侧的两个U型抱箍1101，连接板1102为一矩形面板；杆体连接件111为杆体抱箍111，杆体抱箍111包括位于复合横担10上下两侧的两个U型抱箍111；在连接板1102上设有对应横担抱箍1101的四个安装孔1103，以及对应杆体抱箍111的四个安装孔1104，连接板1102朝向杆体12的一侧设有弧形件1105，弧形件1105的弯曲程度与杆体12的外表面相适应，弧形件1105能够增大连接板1102与杆体12的接触面积，使固定更加稳固。
考虑套筒103的形状和固定的便捷性，U型抱箍1101包括矩形箍1107和固接在矩形箍1107上的圆柱件1108两部分，矩形箍1107适应套筒103的形状，圆柱件1108穿过安装孔1103后利用螺栓进行固定。
实际安装时，可首先将复合横担10与横担抱箍1101安装完毕，即两个U型抱箍1101沿套筒103的周向半包围套筒103后，穿过安装孔1103后利用螺栓进行固定，复合横担10在杆体12上合适的位置时，利用两个U型抱箍111穿过连接板1102上的安装孔1104进行固定，从而将复合横担10固定在杆体12上。
U型抱箍1101固定在套筒103上，在长期运行过程中，U型抱箍1101有可能在套筒103上左右滑动，当滑动到套筒103边缘时会对护套1022 造成损坏，因此为了避免这种滑动，可选在套筒103上对应U型抱箍1101的位置设置凹槽(图中未示出)，起到限位的作用。
本实施例复合横担10固定到杆体12上时，由于是中部对应固定在杆体12上，复合横担10的两个端部均可用来支撑导线，因此可实现至少两相导线的排布，之所以这样说，是因为在一些场合下，复合横担10的中部也可设置挂线金具或针式绝缘子来支撑导线，该复合横担10安装方便，简化了高空操作的复杂度；
上述复合横担10通常应用于35kV及以下电压领域，如10kV、20kV或35kV的配电线路中。在长期线路运行过程中，复合横担10与杆体12连接的中部，荷载直接作用在套筒103上，套筒103具有足够的支承强度，避免对芯棒101的力学性能造成影响。
在其他具体的实施方式中，绝缘层也可选为在芯棒外周面涂覆防腐功能层，如氟碳漆，氟碳漆涂覆在芯棒上除承力件的的其他区域，当然，在承力件的外周面也可涂覆该氟碳漆，使得氟碳漆和承力件之间无缝接触；该防腐功能层同样不具有承受荷载的能力，如果荷载直接作用在该防腐功能层上，容易导致它的脱落，从而使得芯棒暴露在空气中，强度降低，力学性能下降。
在其他具体的实施方式中，套筒上可设置凹槽或凸块，从而能够对放置在套筒上的横担容置件起到限位作用。
实施例二：
本实施例中，复合横担的结构与实施例一类似，在此不再赘述。不同的是复合横担通过固定装置固定到杆体上时，该固定装置有所不同。
如图6-图8所示，该固定装置21包括横担容置件210和杆体连接件211。
横担容置件210包括容置部2101和位于容置部2101两侧的连接片2102。容置部2101用于容置复合横担10上的套筒103，连接片2102用于连接杆体连接件211。容置部2101是一个截面为空心矩形的壳体，壳体内壁与待容置复合横担的外表面相吻合。当然，壳体的内腔截面也可以是圆形或其他多边形。
杆体连接件211包括U型抱箍2110和与U型抱箍2110两侧连接的连接片2111。U型抱箍2110用于容置杆体12，且U型抱箍2110的内表面与其所容置的杆体12的表面吻合。在连接片2111上设置有四个安装孔2112，连接片2102上设置有与连接片2111相对应的四个安装孔2103。
通过该固定装置21将复合横担固定在杆体上。套筒103位于容置部2101内，容置部2101沿套筒外周面局部包围复合横担，U型抱箍2110局部包围杆体，紧固件212通过连接片2111与连接片2102上对应的孔将杆体连接件211与横担容置件210连接在一起，紧固件212可选为螺栓。
实施例三：
如图9-图11所示，复合横担30包括芯棒301、绝缘层302和承力件303。芯棒301为空心的矩形管体，芯棒301内填充聚氨酯泡沫；绝缘层302为在芯棒301上一体注塑成型的硅橡胶伞裙3021和护套3022；承力件303为套筒机构303，通常为金属材质，包括套筒3031和连接板3032，套筒3031包覆固接于芯棒301的外周面，连接板3032固接于套筒3031的一侧，连接板3032用于与杆体32进行连接。
芯棒301通过拉挤工艺成型后，将套筒机构303通过胶装或压接的方式固接到芯棒301上，使得套筒3031包覆芯棒301中部的全部外周面，在套筒3031的两侧分别一体注塑成型硅橡胶伞裙3021和护套3022，套筒3031上设有翻边3034，翻边3034的设置有利于实现与护套3022的密封连接。
套筒3031朝向杆体32的一侧设有连接板3032，连接板3032可选与套筒3031一体模压成型，或者通过焊接或粘接的方式固定在套筒3031上。连接板3032通过杆体连接件31与杆体32进行连接，杆体连接件31包括位于复合横担30上下两侧的U型抱箍31，U型抱箍31套设在杆体32上半包围杆体32的外周面，连接板3032上设有与U型抱箍31配合的四个安装孔3033，U型抱箍穿过安装孔3033后利用螺栓进行紧固，使得复合将横担30固定在杆体32上。
复合横担30固定在杆体32上，在长期运行过程中，杆体32与复合横担30连接部位的荷载作用在套筒3031上，不会对绝缘层302造成损坏， 避免外部环境对芯棒301的腐蚀。
在其他具体的实施方式中，连接板3032上可设弧形件，弧形件焊接在连接板3032上，与电杆连接时能够增大受力面积，使固定更加稳固。
实施例四：
请一起参阅图12-图15。复合横担40包括芯棒401、绝缘层402和承力件403。芯棒401为实心的圆形棒，绝缘层402包括一体注塑成型的硅橡胶伞裙4021和护套4022；承力件403为套筒机构403，通常为金属材质，包括套筒4031和连接板4032，套筒4031包覆固接于芯棒401的外周面，连接板4032上设弧形的卡槽，通过焊接的方式使套筒4031卡接在连接板4032的卡槽内。
芯棒401通过拉挤工艺成型后，将套筒机构403通过胶装或压接的方式固接到芯棒401上，使得套筒4031包覆芯棒401中部的全部外周面，在套筒4031的两侧分别一体注塑成型硅橡胶伞裙4021和护套4022，套筒4031上设有翻边4034，翻边4034的设置有利于实现与护套4022的密封连接。
连接板4032可直接与杆体42进行连接，如实施例三中采用的在杆体42上设U型抱箍，U型抱箍穿过连接板4032上的连接孔后，通过螺栓进行连接。具体到本实施例中，如图14所示，为了保证工程应用的通用性，在连接板4032与杆体42之间设置另一杆体连接板43，连接板4032上设有安装孔4033，与杆体连接板43设有的安装孔431相对应，可通过螺栓将连接板4032固定在杆体连接板43上，也即将复合横担40固定在杆体连接板43上。
杆体连接板43上还设有安装孔432，用于与U型抱箍44进行连接，杆体连接板43靠近杆体42的一侧设有弧形件435，能够增大与杆体42的接触面积，使固定更加稳固。
将复合横担40架设在杆体42上，U型抱箍44半包围杆体42后，穿过安装孔432，再利用螺母进行固定，从而使得复合横担40固定在杆体42上。
杆体连接板43的顶端还设有延伸的耳片433，耳片433上设有安装孔 434，安装孔434可用于与顶相横担进行连接，实现单回三相导线的布置，这里不做具体讨论。
复合横担40固定在杆体42上，无需在复合横担40上打孔，在长期运行过程中，杆体42与复合横担40连接部位的荷载作用在套筒机构403上，不会对绝缘层402造成损坏，避免外部环境对芯棒401的腐蚀。
以上实施例一-实施例四中，承力件设置为套筒或套筒机构，这样做的好处在于套筒与芯棒之间实现无缝连接，套筒上无打孔设置，可以更好地避免湿气等外部环境对芯棒的腐蚀，但是并非将承力件限定在套筒类机构上，例如，将套筒换成两个抱箍套设在芯棒上，两个抱箍之间通过螺栓进行紧固，也可实现包覆固定的作用，虽然防腐蚀效果上有些减弱，但是同样在本发明保护范围内。
本发明的技术内容及技术特点已揭示如上，然而可以理解，在本发明的创作思想下，本领域的技术人员可以对上述结构和材料作各种变化和改进，包括这里单独披露或要求保护的技术特征的组合，明显地包括这些特征的其它组合。这些变形和/或组合均落入本发明所涉及的技术领域内，并落入本发明权利要求的保护范围。

Claims (13)

  1. 一种复合横担，所述复合横担固定在输电杆的杆体上，其特征在于，所述复合横担包括：
    芯棒、绝缘层及承力件，所述绝缘层及所述承力件均包覆固定于所述芯棒的外周面，所述承力件位于所述芯棒与所述杆体连接的中部，所述绝缘层位于除所述中部外的其他区域。
  2. 如权利要求1所述的复合横担，其特征在于，所述绝缘层与所述承力件之间为密封连接。
  3. 如权利要求2所述的复合横担，其特征在于，所述绝缘层为伞裙和/或护套，所述伞裙和/或护套与所述承力件之间为密封连接。
  4. 如权利要求1所述的复合横担，其特征在于，所述承力件包覆固接于所述芯棒的中部后，使所述绝缘层在所述芯棒上除所述中部外的其他区域包覆固接。
  5. 如权利要求1所述的复合横担，其特征在于，所述承力件为套筒，所述套筒的内壁形状与包覆在内的所述芯棒的横截面相吻合。
  6. 如权利要求5所述的复合横担，其特征在于，所述套筒为通过金属冲压工艺成型。
  7. 如权利要求5所述的复合横担，其特征在于，所述复合横担通过固定装置固定在所述杆体上。
  8. 如权利要求7所述的复合横担，其特征在于，所述固定装置包括横担容置件和杆体连接件，所述横担容置件用于容置所述套筒，所述杆体连接件用于连接所述杆体和所述横担容置件。
  9. 如权利要求8所述的复合横担，其特征在于，所述横担容置件包括横担抱箍和连接板，所述杆体连接件为杆体抱箍，所述连接板上设有与所述横担抱箍配合的第一安装、及与所述杆体抱箍配合的第二安装；所述横担抱箍沿所述套筒的周向半包围所述套筒后通过所述第一安装实现固定，所述杆体抱箍沿所述杆体的周向半包围所述杆体后通过所述第二安装实现固定。
  10. 如权利要求9所述的复合横担，其特征在于，所述连接板朝向所述杆体的一侧设有与所述杆体相适应的弧形件。
  11. 根据权利要求8所述的复合横担，其特征在于，所述横担容置件包 括容置部和设于所述容置部上的第一连接片，所述杆体连接件包括抱箍和设于所述抱箍上的第二连接片，所述容置部用于容置所述套筒，所述抱箍套设与所述杆体上，所述第一连接片与所述第二连接片通过紧固件固定。
  12. 如权利要求1所述的复合横担，其特征在于，所述承力件为套筒机构，所述套筒机构包括套筒和连接板，所述套筒包覆固接于所述芯棒的外周面，所述连接板固接于所述套筒的一侧，所述连接板用于与所述杆体进行连接。
  13. 一种输电杆，其特征在于，包括杆体和固定在所述杆体上的如权利要求1-12任一项所述的复合横担。
PCT/CN2018/087362 2017-06-09 2018-05-17 复合横担及输电杆 WO2018223829A1 (zh)

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