CN114123030B - A triple tensile insulator string replacement tool and its replacement method - Google Patents

A triple tensile insulator string replacement tool and its replacement method Download PDF

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Publication number
CN114123030B
CN114123030B CN202111406073.7A CN202111406073A CN114123030B CN 114123030 B CN114123030 B CN 114123030B CN 202111406073 A CN202111406073 A CN 202111406073A CN 114123030 B CN114123030 B CN 114123030B
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clamp
pulley
insulator
plate
cross
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CN114123030A (en
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韩学春
潘灵敏
吴伟
宋恒东
王海亮
鲁永生
白朴
鲍奕
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Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
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Maintenance Branch of State Grid Jiangsu Electric Power Co Ltd
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    • 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
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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Abstract

The utility model provides a triple strain insulator string change instrument for realize that the whole string of triple string strain insulator string is demolishd, main fixture includes cross arm end fixture, wire end fixture, insulating pull rod, hydraulic pressure turn-buckle, as main atress instrument, is used for bearing wire tension. The auxiliary tool comprises an auxiliary closed clamp rear clamp, an auxiliary closed clamp front clamp, a lengthened double-head screw rod, an extension joint, a special insulation pulley and an insulation rope, and is used for being matched with a main clamp to realize replacement of the whole string of insulators. The invention solves the technical problem that the whole insulator string of the triple tension insulator string cannot be replaced, and has simple operation and high replacement efficiency.

Description

Tool and method for replacing triple strain insulator string
Technical Field
The invention relates to the technical field of extra-high voltage transmission line overhaul, in particular to a triple strain insulator string replacement tool and a replacement method thereof.
Background
The safe and stable operation of the ultra-high voltage transmission line is related to the safety of the power grid. When the power grid normally operates, the occurrence of low-value zero-value insulators is unavoidable, and the replacement work of the low-value zero-value insulators is an important component part of unit safety maintenance work, wherein the insulator replacement fixture and the operation method are particularly important.
At present, for 420kN triple strain insulator strings (shown in fig. 1 and 2) of an ultra-high voltage transmission line with the voltage of +/-800 kV, each insulator string is provided with 74 pieces of insulators due to the fact that the insulator strings are too long, the length is 15170mm, and the total length is 17100mm. When the low-value zero-value insulator appears, the operation method of replacing the single insulator by the closed fixture is mainly adopted, and the whole string of insulator replacing tools is not needed, so that the insulator replacing operation is complex, and the replacing efficiency is low.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a 420kN triple strain insulator string replacement tool, which solves the technical problem that the whole string of insulators of the triple strain insulator string cannot be replaced.
The invention particularly provides a replacement tool for a triple-connection strain insulator string, which comprises a main fixture and an auxiliary fixture, wherein the main fixture and the auxiliary fixture are matched with a cross arm end and a wire end of an insulator string hardware fitting to realize the whole string dismantling of the triple-connection strain insulator string.
Preferably, the insulator string hardware cross arm end includes: the hardware fitting wire end of the insulator string comprises an insulator, a grading ring, a bowl head hanging plate, a cross hanging plate, a parallel hanging plate bolt and a parallel hanging plate.
Preferably, the main fixture comprises a cross arm end fixture, a wire end fixture, an insulating pull rod and a hydraulic wire tightener, wherein the cross arm end fixture is connected with the wire end fixture through the hydraulic wire tightener and the insulating pull rod in sequence and is used as a main stress tool for bearing the tension of a wire.
Preferably, the auxiliary tool comprises an auxiliary closed clamp rear clamp, an auxiliary closed clamp front clamp, a lengthened double-head screw rod, an extension joint, a special insulation pulley and an insulation rope, and is used for being matched with a main clamp to realize replacement of the whole string of insulators.
Preferably, the cross arm end clamp is an airfoil clamp and comprises a central part clamping groove and two wing parts, wherein the central part clamping groove is matched with the cross arm side traction plate, and the two wing parts are symmetrically distributed on two sides of the central part and are used for being connected with the hydraulic tightener.
Preferably, the wire end clamp is a plate-turning clamp and comprises a plate-turning clamp main body, a rotating shaft, a plate-turning plate and a groove part, wherein the plate-turning plate can turn around the rotating shaft, and the groove part is positioned at the center of the plate-turning clamp main body and near the rotating shaft and is used for being matched and connected with a parallel hanging plate bolt, a parallel hanging plate and a cross hanging plate.
Preferably, the special insulation pulley comprises a bowl head pulley and a cross plate pulley.
Further, the invention also provides a method for replacing the triple strain insulator string, which comprises the following steps:
s1: the auxiliary closed type front clamp is arranged on a sixth insulator steel cap of the lead end, the auxiliary closed type front clamp and an extension joint are connected by a lengthening double-end lead screw, the extension joint is connected with a connecting lug of the lead end clamp, and the lengthening double-end lead screw is pre-tensioned;
s2: the auxiliary closed type rear clamp is arranged on a 2 nd insulator steel cap at the cross arm end, and U-shaped hanging rings are arranged at the two ends of the auxiliary closed type rear clamp;
s3: the cross arm end clamp is connected with the wire end clamp sequentially through the hydraulic wire tightener and the insulating pull rod, and the hydraulic wire tightener is tightened to enable the wire end clamp, the cross arm end clamp and the insulating pull rod to bear force until the insulator string is loosened, and the load is transferred to the insulating pull rod;
s4: tightening the lengthened double-head screw rod, and sequentially removing the 1 st to 5 th insulators at the wire end;
s5: the bowl head pulley and the cross plate pulley form a pulley group by using an insulating rope, the pulley group is lifted to the side of a lead, the bowl head pulley 21 is connected with a 6 th insulator, the cross plate pulley is matched with a cross hanging plate, and the insulating rope penetrates through a steering pulley arranged on a cross arm of an iron tower to be guided to the ground;
s6: and (3) penetrating another insulating rope on the U-shaped hanging ring, disconnecting the first insulator at the cross arm end from the hardware fitting, gradually loosening the insulating rope by utilizing the pulley block, and guiding the insulator string to the ground, thereby realizing the whole string dismantling of the triple three-hanging strain insulator string.
The invention solves the technical problem that the whole insulator string of the triple tension insulator string cannot be replaced, and compared with the prior art, the replacement operation is simple and the replacement efficiency is higher.
Drawings
Fig. 1 is a front view of a 420kN triple strain insulator string.
Fig. 2 is a top view of a 420kN triple strain insulator string.
Fig. 3 is a diagram of a tool installation a for replacing a 420kN triple strain insulator string according to the present invention.
Fig. 4 is a diagram B of the tool for replacing a 420kN triple strain insulator string according to the present invention.
Fig. 5 is a front view of a cross arm end airfoil card of the present invention.
Figure 6 is a side view-cross-sectional view of a cross arm end airfoil card of the present invention.
Fig. 7 is a schematic view of the opened state of the wire end flap card of the present invention.
Fig. 8 is a schematic view of the wire end flap card of the present invention in a closed state.
Fig. 9 is a top view of the wire end flap card of the present invention in a closed position-a schematic view of the coupling position.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which are obtained by a person skilled in the art based on the described embodiments of the invention, fall within the scope of protection of the invention.
Fig. 1 and 2 show an assembly drawing of a +/-800 kV line 420kN triple-hanging strain insulator string hardware fitting, the insulator string spacing is 650mm, and each string of insulator string is provided with 420kN insulator 74 pieces and 15170mm in length except for a connecting hardware fitting. The connection length of the insulator is 205mm, and the diameter of the porcelain skirt is 400mm.
As shown in fig. 1 and 2, the insulator string hardware cross arm end includes: traction plate 1, parallel link plate 6, insulator 2, insulator chain gold utensil wire end includes: insulator 2, equalizer ring 3, bowl head link plate 4, cross link plate 5, parallel link plate bolt 6, parallel link plate 7.
As shown in fig. 3 and 4, the invention provides a triple strain insulator string replacement tool, which comprises a main fixture and an auxiliary tool.
Wherein the main fixture includes: the cross arm end clamp 8, the wire end clamp 16, the insulating pull rod 10 and the hydraulic tightener 9 are used as main stress tools for bearing the wire tension.
The cross arm end clamp 8 is an airfoil clamp, and as shown in fig. 5 and 6, comprises a central clamping groove 32 and two wing parts 33. The central clamping groove 32 is matched with the cross arm side traction plate 1, the two parts are connected by bolts 23 and nuts 24, and the two wing parts 33 are symmetrically distributed on two sides of the central part and are used for being connected with the hydraulic tightener 9.
The wire end fixture 16 is a board turning clamp, as shown in fig. 7, 8 and 9, and comprises a board turning clamp main body 25, a rotating shaft 26, a board turning plate 27 and a groove part 34, wherein the board turning plate 27 can turn around the rotating shaft 26, and the groove part 34 is positioned at the center of the board turning clamp main body and the position of the board turning plate 27 close to the rotating shaft 26 and is used for being matched and connected with the parallel hanging plate bolt 6, the parallel hanging plate 7 and the cross hanging plate 5.
Fig. 7 shows the wire end clamp in an open state, and the wire end clamp can be opened by removing the nut 28, opening the turning plate 27, and sleeving the main body groove 34 outside the hexagonal head of the bolt 6.
Fig. 8 shows the wire end clamp in a closed state, the turning plate 27 is closed, the groove part 34 of the turning plate is sleeved outside the hexagonal head of the bolt 6, and the nut 28 is screwed tightly, so that the wire end clamp can be closed.
The cross arm end clamp 8 is connected with the lead end clamp 16 sequentially through the hydraulic tightener 9 and the insulating pull rod 10 to form a main stress clamp.
As shown in fig. 9, the body 25 of the wire end clamp 16 has coupling lugs 31 at both ends.
Referring to fig. 3-4, the auxiliary tool comprises an auxiliary closed type card rear card 12, an auxiliary closed type card front card 13, an elongated double-headed screw 14, an elongated joint 15, a special insulation pulley and an insulation rope, and is used for being matched with a main clamp to realize replacement of the whole string of insulators. Wherein the special insulation block comprises a bowl head block 21 and a cross plate block 20.
When the insulator string is required to be replaced, the auxiliary closed type clamp front clamp 13 is arranged on a sixth insulator steel cap of the lead end, the auxiliary closed type clamp front clamp 13 and the extension joint 15 are connected through the extension double-end lead screw 14, the extension joint 15 is connected with the connecting lug 31 of the lead end clamp, and the extension double-end lead screw is pre-tensioned. The auxiliary closed type rear clamp 12 is arranged on the 2 nd insulator steel cap at the cross arm end, and U-shaped hanging rings 11 are arranged at the two ends of the rear clamp.
The cross arm end clamp 8 is connected with the wire end clamp 16 sequentially through the hydraulic wire tightener 9 and the insulating pull rod 10, and the hydraulic wire tightener 9 is tightened to enable the wire end clamp 16, the cross arm end clamp 8 and the insulating pull rod 10 to bear force until the insulator string is loosened, and the load is transferred to the insulating pull rod 10. And (5) tightening the lengthening double-head screw rod 14, and sequentially removing the insulators from the (1) th piece to the (5) th piece of the lead end.
The bowl head pulley 21 and the cross plate pulley 20 are combined into a pulley block by using an insulating rope, and are lifted to the wire side, the bowl head pulley 21 is connected with a (6) th insulator, the cross plate pulley 20 is matched with the cross hanging plate 5, and the insulating rope is led to the ground through a steering pulley arranged on a cross arm of an iron tower (the steering pulley and the cross arm of the iron tower are not shown in the drawing).
Another 1 insulating rope is threaded on the U-shaped hanging ring 11, the connection between the first insulator at the cross arm end and the hardware fitting is taken off, the insulating rope is gradually loosened by utilizing a pulley block consisting of the bowl head pulley 21 and the cross plate pulley 20, and the insulator string is guided to the ground, so that the whole string of the triple-hanging tension insulator string is removed.
While the applicant has described and illustrated the examples of the present invention in detail with reference to the drawings of the specification, it should be understood by those skilled in the art that the above examples are only preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, but not limiting the scope of the present invention, but any improvements or modifications based on the spirit of the present invention should fall within the scope of the present invention.

Claims (3)

1.一种三联耐张绝缘子串更换工具，其特征在于，所述更换工具包括主卡具和辅助卡具，通过主卡具、辅助卡具、绝缘子串金具横担端和绝缘子串金具导线端相配合，实现三联耐张绝缘子串的整串拆除；所述绝缘子串金具横担端包括依次连接的牵引板(1)、平行挂板、绝缘子(2)，所述绝缘子串金具导线端包括依次连接的绝缘子(2)、均压环(3)、碗头挂板(4)、十字挂板(5)、平行挂板螺栓、平行挂板(7)；所述主卡具包括横担端卡具(8)、导线端卡具(16)、绝缘拉棒(10)、液压紧线器(9)；所述横担端卡具(8)为翼型卡，包括中央部卡槽(32)和两翼部(33)，中央部卡槽与横担侧牵引板(1)配合，两翼部对称分布于中央部卡槽两侧，用于和液压紧线器(9)联接；所述导线端卡具(16)为翻板卡，包括翻板卡主体(25)、转轴(26)、翻板(27)和凹槽部(34)，所述翻板(27)能围绕所述转轴(26)翻转，所述凹槽部(34)位于翻板卡主体(25)中心处及所述翻板靠近转轴处，用于与平行挂板螺栓、平行挂板(7)和十字挂板(5)相配合连接；所述横担端卡具依次通过所述液压紧线器和绝缘拉棒与导线端卡具联接，作为主受力工具，用于承载导线张力；所述辅助卡具包括辅助闭式卡后卡(12)、辅助闭式卡前卡(13)、加长双头丝杠(14)、延长接头(15)、特种绝缘滑车及绝缘绳，用于配合主卡具，实现整串绝缘子的更换；1. A triple tension-resistant insulator string replacement tool, characterized in that the replacement tool includes a main fixture and an auxiliary fixture. Through the main fixture, the auxiliary fixture, the cross arm end of the insulator string hardware and the wire end of the insulator string hardware Cooperating with each other, the entire string of triple tension-resistant insulator strings can be dismantled; the cross-arm end of the insulator string hardware includes a traction plate (1), a parallel hanging plate, and an insulator (2) connected in sequence; and the wire end of the insulator string includes a metal fitting in sequence. The connected insulator (2), voltage equalizing ring (3), bowl hanging plate (4), cross hanging plate (5), parallel hanging plate bolts, parallel hanging plate (7); the main clamp includes the cross arm end Clamp (8), wire end clamp (16), insulating rod (10), hydraulic wire tightener (9); the cross arm end clamp (8) is a wing-shaped clamp, including a central slot ( 32) and two wings (33), the central slot cooperates with the cross arm side traction plate (1), and the two wings are symmetrically distributed on both sides of the central slot for connection with the hydraulic tensioner (9); The wire end clamp (16) is a flip card, including a flip card body (25), a rotating shaft (26), a flip plate (27) and a groove portion (34). The flip plate (27) can surround the The rotating shaft (26) is turned over, and the groove portion (34) is located at the center of the flip card body (25) and the flip plate is close to the rotating shaft, and is used for connecting with the parallel hanging plate bolts, the parallel hanging plate (7) and the cross hanging plate. The plates (5) are matched and connected; the cross arm end clamp is connected to the wire end clamp through the hydraulic cable tightener and the insulating pull rod in turn, serving as the main force-bearing tool for carrying the wire tension; the auxiliary clamp Tools include auxiliary closed clamp rear clamp (12), auxiliary closed clamp front clamp (13), extended double-head screw (14), extension joint (15), special insulated pulley and insulated rope, used to cooperate with the main clamp , realize the replacement of the entire string of insulators; 使用时，辅助闭式卡前卡(13)用于安装在导线端第六片绝缘子钢帽上，用加长双头丝杆(14)联接辅助闭式卡前卡(13)及延长接头(15)，延长接头(15)再联接导线端卡具的联接耳(31)，预紧加长双头丝杆；辅助闭式卡后卡(12)用于安装在横担端第2片绝缘子钢帽上，并在辅助闭式卡后卡两端安装好U型挂环(11)。When in use, the auxiliary closed-type front card (13) is used to be installed on the sixth insulator steel cap at the conductor end, and the extended double-head screw rod (14) is used to connect the auxiliary closed-type front card (13) and the extension joint (15) ), extend the joint (15) and then connect the connecting lug (31) of the wire end clamp, preload and lengthen the double-head screw rod; the auxiliary closed clamp rear clamp (12) is used to install the second insulator steel cap at the cross arm end and install U-shaped hanging rings (11) on both ends of the rear card of the auxiliary closed card. 2.根据权利要求1所述的工具，其特征在于，所述特种绝缘滑车包括碗头滑车(21)和十字板滑车(20)，使用时用绝缘绳将碗头滑车(21)和十字板滑车(20)组成滑车组，并起吊至导线侧，碗头滑车(21)与第6片绝缘子联接好，十字板滑车(20)与十字挂板(5)相配合，绝缘绳穿过安装在铁塔横担上的转向滑车引导至地面；在U型挂环(11)上穿好另一根绝缘绳。2. The tool according to claim 1, characterized in that the special insulated pulley includes a bowl-head pulley (21) and a cross plate pulley (20). When in use, the bowl-head pulley (21) and the cross plate pulley are connected with an insulating rope. The pulley (20) forms a pulley group and is lifted to the wire side. The bowl-head pulley (21) is connected to the sixth insulator. The cross plate pulley (20) cooperates with the cross hanging plate (5). The insulating rope is passed through and installed on the The steering pulley on the tower cross arm is guided to the ground; thread another insulating rope on the U-shaped hanging ring (11). 3.一种三联耐张绝缘子串更换方法，其特征在于，采用权利要求2所述的工具，所述方法包括以下步骤：3. A method for replacing triple tensile insulator strings, characterized in that the tool according to claim 2 is used, and the method includes the following steps: S1：将辅助闭式卡前卡(13)安装在导线端第六片绝缘子钢帽上，用加长双头丝杆(14)联接辅助闭式卡前卡(13)及延长接头(15)，延长接头(15)再联接导线端卡具的联接耳(31)，预紧加长双头丝杆；S1: Install the auxiliary closed card front card (13) on the sixth insulator steel cap at the conductor end, and use the extended double-headed screw (14) to connect the auxiliary closed card front card (13) and the extension joint (15). Extend the joint (15) and then connect it to the connecting lug (31) of the wire end clamp, and pre-tighten the lengthened double-head screw rod; S2：将辅助闭式卡后卡(12)安装在横担端第2片绝缘子钢帽上，并在辅助闭式卡后卡两端安装好U型挂环(11)；S2: Install the auxiliary closed back card (12) on the second insulator steel cap at the cross arm end, and install U-shaped hanging rings (11) at both ends of the auxiliary closed back card; S3：横担端卡具(8)依次通过液压紧线器(9)和绝缘拉棒(10)与导线端卡具(16)联接，收紧液压紧线器，使得导线端卡具及横担端卡具、绝缘拉棒受力，直至绝缘子串松弛，载荷转移到绝缘拉棒(10)上；S3: The cross arm end clamp (8) is connected to the conductor end clamp (16) through the hydraulic cable tightener (9) and the insulating pull rod (10). Tighten the hydraulic cable tightener so that the conductor end clamp and the cross arm end clamp are connected to each other. The end clamp and insulating rod are stressed until the insulator string relaxes and the load is transferred to the insulating rod (10); S4：收紧加长双头丝杆(14)，依次摘除导线端第1片到第5片绝缘子；S4: Tighten the extended double-headed screw (14), and remove the first to fifth insulators at the wire end in sequence; S5：用绝缘绳将碗头滑车(21)和十字板滑车(20)组成滑车组，并起吊至导线侧，碗头滑车(21)与第6片绝缘子联接好，十字板滑车(20)与十字挂板(5)相配合，绝缘绳穿过安装在铁塔横担上的转向滑车引导至地面；S5: Use insulating ropes to form a pulley set with the bowl-head pulley (21) and the cross-plate pulley (20), and lift it to the conductor side. The bowl-head pulley (21) is connected to the sixth insulator, and the cross-plate pulley (20) is connected to the wire side. The cross hanging plate (5) cooperates, and the insulating rope is guided to the ground through the steering pulley installed on the cross arm of the iron tower; S6：在U型挂环(11)上穿好另一根绝缘绳，摘开横担端第一片绝缘子与金具的联接，逐步放松绝缘绳，利用滑车组将绝缘子串引导至地面，从而实现三联耐张绝缘子串的整串拆除。S6: Thread another insulating rope on the U-shaped hanging ring (11), remove the connection between the first insulator at the cross arm end and the hardware, gradually loosen the insulating rope, and use the pulley set to guide the insulator string to the ground, thereby achieving The entire string of triple tensile insulator strings is dismantled.
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CN114865524B (en) * 2022-04-13 2024-02-20 云南电网有限责任公司曲靖供电局 Indirect method electrified replacement 10kV line tension insulator wire side clamp and use method

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CN106207850A (en) * 2016-07-25 2016-12-07 国网福建省电力有限公司 Working method for replacing linear insulator strings of two-hole duplex boards with power on
CN106410662A (en) * 2016-09-13 2017-02-15 段宏 Method for replacing two tension insulator strings of 220KV line in power failure
CN107425474A (en) * 2017-08-22 2017-12-01 河南送变电工程公司 For changing the device of strain insulator
KR101965973B1 (en) * 2017-10-13 2019-04-04 한국전력공사 The replacement devise of electric transmission tower insulator strings and method thereof

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