CN111404074B - A device for live replacement of UHV insulators - Google Patents
A device for live replacement of UHV insulators Download PDFInfo
- Publication number
- CN111404074B CN111404074B CN201911282282.8A CN201911282282A CN111404074B CN 111404074 B CN111404074 B CN 111404074B CN 201911282282 A CN201911282282 A CN 201911282282A CN 111404074 B CN111404074 B CN 111404074B
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- piston
- connecting seat
- screw rod
- insulator
- hydraulic bolt
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- 239000012212 insulator Substances 0.000 title claims abstract description 43
- 239000011810 insulating material Substances 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229920001778 nylon Polymers 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000012856 packing Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- 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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- Electric Cable Installation (AREA)
Abstract
The invention provides a device for replacing an extra-high voltage insulator in a charged mode, which comprises a connecting seat, wherein a manual hydraulic pump and a hydraulic bolt stretcher are arranged on the connecting seat, the manual hydraulic pump and the hydraulic bolt stretcher are connected through an oil pipe, a lead screw is connected onto the hydraulic bolt stretcher, the lead screw axially moves under the driving of the hydraulic bolt stretcher, one end of the lead screw is connected with a pull rope made of an insulating material, a connecting hook is arranged at one end, away from the lead screw, of the pull rope, a clamping groove is formed in the connecting seat, and an upper limiting ring and a lower limiting ring are arranged on the lead. When the insulator is replaced in a charged state, the axial tension load of the insulator can be eliminated, so that the insulator is changed from a tight state to a loose state, and the replacement of the insulator is facilitated.
Description
Technical Field
The invention relates to the technical field of live working, in particular to a device for replacing an extra-high voltage insulator in a live manner.
Background
As the 1000kV ultrahigh voltage transmission line in China just starts to be established and operated, no dominant fault occurs at present. However, due to the influence of internal electrical factors and external environmental factors, the insulator string may be aged and damaged by the jumper wire of the tension tower, and needs to be replaced. Therefore, some prospective researches on the replacement technology of the jumper wire synthetic insulator string are necessary to deal with the occurrence of the fault of the jumper wire synthetic insulator string. According to the structural characteristics of the insulator string synthesized by the jumper wire of the extra-high voltage line and the hardware related to the insulator string, the technical difficulty in replacing the insulator string synthesized by the jumper wire of the extra-high voltage line is analyzed, and a replacement scheme aiming at the insulator string synthesized by the jumper wire of the 1000kV extra-high voltage line is researched. The advantages of live insulator replacement are as follows: in the replacement process, the power supply does not need to be cut off, the power failure can be avoided, and the normal power supply is ensured.
One end of the insulator is connected with the cross arm of the power transmission iron tower, and the other end of the insulator is connected with the power transmission cable. The insulator can bear larger axial tension load under normal state due to the tension of the transmission cable, so that the insulator is in a tight state, and the insulator is difficult to replace.
Disclosure of Invention
The invention aims to solve the problem that the insulator is difficult to replace in a charged manner, and provides a device for replacing an extra-high voltage insulator in a charged manner, which can effectively solve the problem.
The purpose of the invention is realized by the following technical scheme: the utility model provides a change special high voltage insulator device with electricity, includes the connecting seat, be provided with manual hydraulic pump and hydraulic bolt stretcher on the connecting seat, link to each other through oil pipe between manual hydraulic pump and the hydraulic bolt stretcher, be connected with the lead screw on the hydraulic bolt stretcher, the lead screw is axial displacement under the drive of hydraulic bolt stretcher, the stay cord that has made with insulating material is connected to lead screw one end, the one end that the lead screw was kept away from to the stay cord is provided with the coupling hook, is provided with the draw-in groove on the connecting seat, is provided with spacing ring and lower spacing ring on the lead.
When the connecting device is used, the connecting seat is fixed on a cross arm of a power transmission iron tower, the connecting hook hooks one end of a power transmission cable, then the manual hydraulic pump is manually driven, the manual hydraulic pump supplies oil to the hydraulic bolt tensioner, the hydraulic bolt tensioner drives the screw rod to axially move and further drives the pull rope to move, the pull rope pulls one end of the power transmission cable to the direction of the insulating terminal for a certain distance, the pulling force of the power transmission cable is transferred to the pull rope, the pulling force of the power transmission cable on the insulator is eliminated, the axial pulling force load of the insulator is further eliminated, the insulator is changed from a tight state to a loose state, and the replacement of the insulator is facilitated. Be provided with the draw-in groove on the connecting seat, conveniently with the connecting seat joint on steel pylons's cross arm. The upper limit ring and the lower limit ring which are arranged on the screw rod limit the up-and-down movement of the screw rod.
Preferably, the pull cord is made of a nylon material. The pull rope is made of nylon materials, has high strength and good insulating property.
Preferably, one end of the hydraulic bolt stretcher, which is close to the connecting seat, is provided with two arc plates, the two arc plates are respectively arranged on two sides of the bottom of the hydraulic bolt stretcher, the connecting seat is provided with arc limiting plates corresponding to the arc plates, and the arc plates are clamped between the arc limiting plates.
Preferably, a threaded hole is formed in one side of the clamping groove, a screw rod is connected in the threaded hole in a threaded manner, and one end of the screw rod extends out of the connecting seat; a pressing plate is arranged in the clamping groove, a push rod is arranged on one side, close to the screw rod, of the pressing plate, and a pressure amplifier is arranged between the screw rod and the push rod. When the connecting seat is connected with the cross arm, the angle steel card on the cross arm is clamped into the clamping groove, and the screw rod is axially moved by rotating the screw rod, so that the pressing plate is pushed to move, the pressing plate is enabled to press the angle steel on the cross arm, and the connecting seat is more stable in connection. Through set up pressure amplifier between screw rod and push rod, pressure amplifier can amplify the screw to the pressure of clamp plate, increases the packing force of clamp plate, further improves the fixity of connecting.
Preferably, the pressure amplifier comprises a cylinder body, a first piston cavity is formed in one end, close to the screw rod, of the cylinder body, a second piston cavity is formed in one end, close to the push rod, of the cylinder body, the first piston cavity is communicated with the second piston cavity, the cross-sectional area of the second piston cavity is larger than that of the first piston cavity, a first piston is arranged in the first piston cavity, a second piston is arranged in the second piston cavity, hydraulic oil is filled between the first piston and the second piston, one end of the screw rod abuts against the first piston, and one end, far away from the pressing plate, of the push rod abuts against the second piston. The working principle of the pressure amplifier is as follows: the screw rod is rotated to enable the screw rod to move forwards, the screw rod drives the first piston to move forwards when moving forwards, and the second piston moves forwards under the action of hydraulic oil when the first piston moves forwards, so that the push rod and the pressure plate are pushed to move forwards; because the cross-sectional area of second piston chamber is greater than the cross-sectional area of first piston chamber, and the area of second piston is also greater than the area of first piston, the pressure that acts on like this on the second piston just is greater than pressure on the first piston to play the effect of enlarged pressure, improved the packing force of clamp plate, and then improved the steadiness when connecting seat is connected with the cross arm.
Preferably, a friction pad is arranged on one side of the pressure plate away from the push rod.
Preferably, the friction pad is made of rubber.
Preferably, the upper limit ring and the lower limit ring are both annular, and the upper limit ring and the lower limit ring are connected to the screw rod through threads.
The invention has the beneficial effects that: when the insulator is replaced in a charged state, the axial tension load of the insulator can be eliminated, so that the insulator is changed from a tight state to a loose state, and the replacement of the insulator is facilitated.
Drawings
Fig. 1 is a front view of the present invention.
Fig. 2 is a top view of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 1.
In the figure: 1. connecting seat, 3, manual hydraulic pump, 4, handle, 5, oil pipe, 6, hydraulic bolt stretcher, 7, circular arc board, 8, circular arc limiting plate, 9, lead screw, 10, last spacing ring, 11, lower limiting ring, 12, stay cord, 13, coupling hook, 14, draw-in groove, 15, cylinder body, 16, first piston chamber, 17, second piston chamber, 18, first piston, 19, second piston, 20, screw rod, 21, push rod, 22, clamp plate, 23, friction pad.
Detailed Description
The invention is further described by the following detailed description in conjunction with the accompanying drawings.
Example 1:
as shown in fig. 1 to 3, a device for replacing an extra-high voltage insulator in a live mode comprises a connecting seat 1, a manual hydraulic pump 3 and a hydraulic bolt tensioner 6. The manual hydraulic pump 3 and the hydraulic bolt tensioner 6 are arranged on the connecting seat 1. The manual hydraulic pump 6 is provided with a handle 4. The hydraulic bolt tensioner 6 adopts the prior art, and the specific structure and principle thereof can be seen in utility model patent with publication number CN 206632941U, which is named as a hydraulic bolt tensioner. One end of the hydraulic bolt tensioner 6 close to the connecting seat 1 is provided with an arc plate 7. The two arc plates 7 are arranged and are respectively arranged at two sides of the bottom of the hydraulic bolt stretcher 6. An arc limiting plate 8 corresponding to the arc plate 7 is arranged on the connecting seat 1. The arc plate 7 is clamped between the arc limiting plates 8. The hydraulic bolt tensioner 6 is connected with the first hydraulic pump 3 through an oil pipe 5. The hydraulic bolt stretcher 6 is connected with a screw rod 9. The screw 9 is driven by the hydraulic bolt tensioner 6 to move axially. The screw rod 9 is provided with an upper limit ring 10 and a lower limit ring 11. The upper and lower retainer rings 10 and 11 are located on either side of the hydraulic bolt tensioner 6. The upper limiting ring 10 and the lower limiting ring 11 are both circular rings, and the upper limiting ring 10 and the lower limiting ring 11 are connected to the screw rod 9 through threads. The connecting seat 1 is provided with a through hole through which the screw rod 9 can pass.
One end of the screw rod 9 is connected with a pull rope 12 made of insulating materials, and one end of the pull rope 12 far away from the screw rod 9 is provided with a connecting hook 13. The pull cord 12 is made of a nylon material. The connecting seat 1 is provided with a clamping groove 14. A threaded hole is formed in one side of the clamping groove 14, a screw rod 20 is connected to the threaded hole in a threaded mode, and one end of the screw rod extends out of the connecting seat 1. A pressing plate 22 is arranged in the clamping groove 14, and a push rod 21 is arranged on one side of the pressing plate 22 close to the screw rod 20. A pressure amplifier is arranged between the screw 20 and the push rod 21. The side of the pressure plate 22 remote from the push rod 21 is provided with a friction pad 23. The friction pad 23 is made of rubber. The pressure amplifier comprises a cylinder body 15, wherein a first piston cavity 16 is arranged at one end, close to a screw rod 20, in the cylinder body 15, and a second piston cavity 17 is arranged at one end, close to a push rod 21, in the cylinder body 15. The first piston chamber 16 and the second piston chamber 17 communicate. The cross-sectional area of the second piston chamber 17 is larger than the cross-sectional area of the first piston chamber 16. A first piston 18 is disposed in the first piston chamber 16 and a second piston 19 is disposed in the second piston chamber 17. The first piston 18 and the second piston 19 are filled with hydraulic oil therebetween. One end of the screw 20 abuts against the first piston 18, and one end of the push rod 21 remote from the pressure plate 22 abuts against the second piston 19. When the connecting seat is connected with the cross arm, the angle steel card on the cross arm is clamped into the clamping groove, and the screw rod is axially moved by rotating the screw rod, so that the pressing plate is pushed to move, the pressing plate is enabled to press the angle steel on the cross arm, and the connecting seat is more stable in connection. Through set up pressure amplifier between screw rod and push rod, pressure amplifier can amplify the screw to the pressure of clamp plate, increases the packing force of clamp plate, further improves the fixity of connecting. The working principle of the pressure amplifier is as follows: the screw rod is rotated to enable the screw rod to move forwards, the screw rod drives the first piston to move forwards when moving forwards, and the second piston moves forwards under the action of hydraulic oil when the first piston moves forwards, so that the push rod and the pressure plate are pushed to move forwards; because the cross-sectional area of second piston chamber is greater than the cross-sectional area of first piston chamber, and the area of second piston is also greater than the area of first piston, the pressure that acts on like this on the second piston just is greater than pressure on the first piston to play the effect of enlarged pressure, improved the packing force of clamp plate, and then improved the steadiness when connecting seat is connected with the cross arm.
When the connecting device is used, the connecting seat is fixed on a cross arm of a power transmission iron tower, the connecting hook hooks one end of a power transmission cable, then the manual hydraulic pump is manually driven, the manual hydraulic pump supplies oil to the hydraulic bolt tensioner, the hydraulic bolt tensioner drives the screw rod to axially move and further drives the pull rope to move, the pull rope pulls one end of the power transmission cable to the direction of the insulating terminal for a certain distance, the pulling force of the power transmission cable is transferred to the pull rope, the pulling force of the power transmission cable on the insulator is eliminated, the axial pulling force load of the insulator is further eliminated, the insulator is changed from a tight state to a loose state, and the replacement of the insulator is facilitated. Be provided with the draw-in groove on the connecting seat, conveniently with the connecting seat joint on steel pylons's cross arm. The upper limit ring and the lower limit ring which are arranged on the screw rod limit the up-and-down movement of the screw rod.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. The utility model provides a change extra-high voltage insulator device with electricity which characterized in that: the hydraulic bolt drawing device comprises a connecting seat, wherein a manual hydraulic pump and a hydraulic bolt drawing device are arranged on the connecting seat, the manual hydraulic pump and the hydraulic bolt drawing device are connected through an oil pipe, a lead screw is connected onto the hydraulic bolt drawing device, the lead screw is driven by the hydraulic bolt drawing device to move axially, one end of the lead screw is connected with a pull rope made of an insulating material, one end of the pull rope, far away from the lead screw, is provided with a connecting hook, a clamping groove is formed in the connecting seat, and an upper limiting ring and a lower limiting ring are arranged; one side of the clamping groove is provided with a threaded hole, a screw rod is connected in the threaded hole in a threaded manner, and one end of the screw rod extends out of the connecting seat; a pressure plate is arranged in the clamping groove, a push rod is arranged on one side of the pressure plate close to the screw rod, and a pressure amplifier is arranged between the screw rod and the push rod; the pressure amplifier comprises a cylinder body, a first piston cavity is formed in one end, close to the screw rod, of the cylinder body, a second piston cavity is formed in one end, close to the push rod, of the cylinder body, the first piston cavity is communicated with the second piston cavity, the cross-sectional area of the second piston cavity is larger than that of the first piston cavity, a first piston is arranged in the first piston cavity, a second piston is arranged in the second piston cavity, hydraulic oil is filled between the first piston and the second piston, one end of the screw rod is abutted to the first piston, and one end, away from the pressing plate, of the push rod is abutted to the second piston.
2. The device for replacing the extra-high voltage insulator in a charged manner according to claim 1, wherein the pull rope is made of a nylon material.
3. The device for replacing the extra-high voltage insulator in a charged manner according to claim 1, wherein two arc plates are arranged at one end, close to the connecting seat, of the hydraulic bolt tensioner, the two arc plates are respectively arranged at two sides of the bottom of the hydraulic bolt tensioner, arc limiting plates corresponding to the arc plates are arranged on the connecting seat, and the arc plates are clamped between the arc limiting plates.
4. The device for replacing the extra-high voltage insulator in a charged manner according to claim 1, wherein a friction pad is arranged on one side of the pressing plate, which is far away from the push rod.
5. The device for replacing the extra-high voltage insulator in a charged mode according to claim 4, wherein the friction pad is made of rubber.
6. The device for replacing the extra-high voltage insulator in a charged manner according to claim 1, wherein the upper limiting ring and the lower limiting ring are both circular rings and are in threaded connection with the screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911282282.8A CN111404074B (en) | 2019-12-13 | 2019-12-13 | A device for live replacement of UHV insulators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911282282.8A CN111404074B (en) | 2019-12-13 | 2019-12-13 | A device for live replacement of UHV insulators |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111404074A CN111404074A (en) | 2020-07-10 |
| CN111404074B true CN111404074B (en) | 2021-05-18 |
Family
ID=71428374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911282282.8A Active CN111404074B (en) | 2019-12-13 | 2019-12-13 | A device for live replacement of UHV insulators |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111404074B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA001831B1 (en) * | 1997-09-24 | 2001-08-27 | Эдвард А. Корлью | Multi-well computerized control of fluid pumping |
| CN201918519U (en) * | 2011-01-27 | 2011-08-03 | 宜兴市宜安电力工具制造有限公司 | Portable power construction grounding device |
| CN104242150A (en) * | 2014-08-29 | 2014-12-24 | 国家电网公司 | Object lifting device for power transmission line pole tower |
| CN104300424A (en) * | 2014-09-29 | 2015-01-21 | 国家电网公司 | Cross arm clamp of insulator chain erection tower |
| CN205452982U (en) * | 2016-01-28 | 2016-08-10 | 江苏省电力公司南京供电公司 | Supporting device for replacing cable terminal post insulators |
| RU2602777C1 (en) * | 2015-07-07 | 2016-11-20 | Роман Вячеславович Жуков | Method of preventing person from falling when rising and lowering on supports of overhead transmission lines and device therefor |
| CN206632941U (en) * | 2017-03-21 | 2017-11-14 | 江苏华恩机械科技有限公司 | A kind of hydraulic bolt tensioning jack |
| CN208561546U (en) * | 2018-07-05 | 2019-03-01 | 上海市机械施工集团有限公司 | A kind of tool anchor device for replacing centre-hole jack |
| CN208608639U (en) * | 2018-07-18 | 2019-03-15 | 中国电建集团河南工程有限公司 | Aerial earth wire hanging point bolt replaces tool |
-
2019
- 2019-12-13 CN CN201911282282.8A patent/CN111404074B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA001831B1 (en) * | 1997-09-24 | 2001-08-27 | Эдвард А. Корлью | Multi-well computerized control of fluid pumping |
| CN201918519U (en) * | 2011-01-27 | 2011-08-03 | 宜兴市宜安电力工具制造有限公司 | Portable power construction grounding device |
| CN104242150A (en) * | 2014-08-29 | 2014-12-24 | 国家电网公司 | Object lifting device for power transmission line pole tower |
| CN104300424A (en) * | 2014-09-29 | 2015-01-21 | 国家电网公司 | Cross arm clamp of insulator chain erection tower |
| RU2602777C1 (en) * | 2015-07-07 | 2016-11-20 | Роман Вячеславович Жуков | Method of preventing person from falling when rising and lowering on supports of overhead transmission lines and device therefor |
| CN205452982U (en) * | 2016-01-28 | 2016-08-10 | 江苏省电力公司南京供电公司 | Supporting device for replacing cable terminal post insulators |
| CN206632941U (en) * | 2017-03-21 | 2017-11-14 | 江苏华恩机械科技有限公司 | A kind of hydraulic bolt tensioning jack |
| CN208561546U (en) * | 2018-07-05 | 2019-03-01 | 上海市机械施工集团有限公司 | A kind of tool anchor device for replacing centre-hole jack |
| CN208608639U (en) * | 2018-07-18 | 2019-03-15 | 中国电建集团河南工程有限公司 | Aerial earth wire hanging point bolt replaces tool |
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| Publication number | Publication date |
|---|---|
| CN111404074A (en) | 2020-07-10 |
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