CA2823137A1 - Maintenance tool used for double insulator strings of direct current transmission line - Google Patents
Maintenance tool used for double insulator strings of direct current transmission line Download PDFInfo
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- CA2823137A1 CA2823137A1 CA2823137A CA2823137A CA2823137A1 CA 2823137 A1 CA2823137 A1 CA 2823137A1 CA 2823137 A CA2823137 A CA 2823137A CA 2823137 A CA2823137 A CA 2823137A CA 2823137 A1 CA2823137 A1 CA 2823137A1
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- clamp
- string
- crossarm
- knife
- transmission line
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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
- H02G1/04—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables for mounting or stretching
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Abstract
A maintenance tool used for double insulator strings of a direct current transmission line comprises fixtures installed at the two sides of the double insulator strings and a tensioning device connected between the fixtures. The fixture comprises a clamp (1) on a V type string connected fixedly to a fitting hanging point angle steel at a tower body side, a clamp (2) on a cross arm connected fixedly on a cross arm wrapper sheet (8), and a knife-like clamp (3) connected fixedly to a V-type in-line plate (6). The tensioning device is a mechanical transmission lead screw (4) which is connected between the clamp (1) on the V type string and the knife-like clamp (3) or between the clamp (2) on the cross arm and the knife-like clamp (3). The maintenance tool has the advantages of sensible structure, high integral strength, low weight and reliable operation, thereby providing a reliable guarantee for the safe commissioning as well as routine maintenance of the direct current transmission line.
Description
MAINTENANCE TOOL USED FOR DOUBLE INSULATOR STRINGS OF
DIRECT CURRENT TRANSMISSION LINE
FIELD OF THE INVENTION
[0001] The present application relates to the field of the electric power, and particularly to a maintenance tool for a double insulator strings on a direct current transmission line.
BACKGROUND OF THE INVENTION
DIRECT CURRENT TRANSMISSION LINE
FIELD OF THE INVENTION
[0001] The present application relates to the field of the electric power, and particularly to a maintenance tool for a double insulator strings on a direct current transmission line.
BACKGROUND OF THE INVENTION
[0002] As the power grid construction of China is improved increasingly, the extra high voltage transmission line becomes the backbone of the power grid frame of China, which also has a higher requirement on the maintenance work. Especially, as the 660kV grade of direct current transmission line is firstly applied in China, in order to ensure the normal operation of the transmission line and that troubles found during the operation of the transmission line can be solved timely, to thereby ensure the safe operation of the direct current transmission line, it is necessary to develop a set of tools for the maintenance of the transmission line in operation.
[0003] One of the primary contents of the maintenance work of the transmission line is to repair and replace an insulator. Most high voltage transmission lines are supported on the crossarm via an insulator. The insulator includes a linear insulator and a tension insulator, and the tension insulator includes a single porcelain insulator and a string of insulators. In a 660kV grade of direct current transmission line, the direct current insulator employs a V
type composite double insulator strings which has a length of about 9m. Influenced by the length of the insulator string and the electric clearance, the tower head for carrying the insulators and the transmission lines has a large size, and the vertical load of the lines increases accordingly, which has a higher requirement on the replacement of the insulator in aspects such as the tension and the length. At present, maintenance tools for the transmission line at a voltage grade below 500kV in China have been more perfect, however, due to the increase of the voltage grade, the diameter of the transmission line and the length of the insulator string are increased. Thus the maintenance tools have been far from the requirements for the replacement.
SUMMARY OF THE INVENTION
type composite double insulator strings which has a length of about 9m. Influenced by the length of the insulator string and the electric clearance, the tower head for carrying the insulators and the transmission lines has a large size, and the vertical load of the lines increases accordingly, which has a higher requirement on the replacement of the insulator in aspects such as the tension and the length. At present, maintenance tools for the transmission line at a voltage grade below 500kV in China have been more perfect, however, due to the increase of the voltage grade, the diameter of the transmission line and the length of the insulator string are increased. Thus the maintenance tools have been far from the requirements for the replacement.
SUMMARY OF THE INVENTION
[0004] The technical problem to be solved by the present application is to provide a maintenance tool for a double insulator strings on a 660kV direct current transmission line.
[0005] In view of this, the present application adopts the following technical solutions.
[0006] A maintenance tool for a double insulator strings on a direct current transmission line which includes a clamping device configured to be clamped at two sides of the double insulator strings and a tension device configured to be connected between the clamping device. The clamping device includes a V-string upper clamp fixedly connected to a fitting-hanging point angle steel at a side of a tower body, a crossarm upper clamp fixedly connected to a crossarm wrapper plate and a knife-like clamp fixedly connected to a V-string yoke plate. The tension device is a mechanical transmission screw rod connected between the V-string upper clamp and = 10 the knife-like clamp or between the crossarm upper clamp and the knife-like clamp. When replacing an inner string of the double insulator strings, a composition of the V-string upper clamp, the knife-like clamp and the tension device is used. When replacing an outer string of the double insulator strings, a composition of the crossarm upper clamp, the knife-like clamp and the tension device is used.
[0007] The structure of the V-string upper clamp is that: the V-string upper clamp includes a V-string upper plate and a V-string lower plate located at two sides of the fitting-hanging point angle steel at the side of the tower body, respectively. An inner end face of the V-string upper plate is formed with a clamping groove I corresponded to the fitting-hanging point angle steel at the side of the tower body, and an outer end face of the V-string lower plate is articulated with a steel connector I, and the other end of the steel connector I is provided with a pin hole for connecting the tension device. Two ends of the V-string upper plate are connected with two ends of the V-string lower plate via bolts.
[0008] The structure of the crossarm upper clamp is that: the crossarm upper clamp includes a crossarm upper clamp main body and a steel connector II articulated with the crossarm upper clamp main body for connecting the tension device. The crossarm upper clamp main body is provided with a bolt hole corresponded to a connecting hole of the crossarm wrapper plate.
[0009] The structure of the knife-like clamp is that: the handle end of the knife-like clamp is provided with a pin hole for connecting the tension device, and the head end of the knife-like clamp is provided with a clamping groove II for clamping the V-string yoke plate. The head end portion and two side walls of the clamping groove II are configured in a bend shape.
[0010] The improvement of the tension device lies in that: the tension device includes a mechanical transmission screw rod and a hydraulic device connected to one end of the mechanical transmission screw rod via a locating pin or an insulation pulling rod.
[0011] With the above technical solutions, the present application has the following technical progresses.
[0012] Based on characters of the direct current transmission line such as the tower-shaped structure, the hanging manner of the insulator string and parameters of the earth wire, the present application provides a maintenance tool for the live maintaining of a double insulator strings on a 660kV direct current transmission line. The maintenance tool has advantages such as a proper structure, a high overall strength, a light weight and a reliable operation, thereby providing a reliable guarantee for the safe commissioning as well as the routine maintenance after the commissioning of the 660kV direct current transmission line..
[0013] The tension device is configured to be a composition of the mechanical transmission screw rod and the hydraulic device, for shortening or enlarging idle strokes of the clamps, which overcomes the disadvantage that the hydraulic transmission system has a slow transmission speed when being used for transmitting a large mechanical load, and reduces the working time of the operator when working high above the ground. Besides, the structure has a function of mutual protection, that is, when one of the transmission mechanisms fails, the normal work of the other transmission mechanism would not be influenced, thereby the operation reliability is greatly improved. Further, since the tension device is assembled from separate structures, when the tension device is in idle, the separate structures may be stored separately, thereby facilitating the replacement and the maintenance.
BRIEF DESCRIPTION OF THE DRAWINGS
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a connecting relationship diagram showing the connection relationship among the components in replacing the inner string according to the present application;
[0015] Figure 2 is a connecting relationship diagram showing the connection relationship among the components in replacing the inner string according to the present application;
[0016] Figure 3 is a structural schematic view of a V-string upper clamp;
[0017] Figure 4 is a structural schematic view of a crossarm upper clamp;
[0018] Figure 5 is a front view of a knife-like clamp; and [0019] Figure 6 is a top view of the knife-like clamp.
[0020] Reference numbers in the figures:
1. V-string upper clamp, 11. V-string upper plate, 12. V-string lower plate, 13. steel connector I, 14. clamping groove I, 2. crossarm upper clamp, 21. crossarm upper clamp main body, 22. steel connector II, 3. knife-like clamp, 31. clamping groove II, 4. mechanical transmission screw rod, 5. hydraulic device, 6. V-string yoke plate, 7. insulation pulling rod, and 8. crossarm wrapper plate.
DETAILED DESCRIPTION
1. V-string upper clamp, 11. V-string upper plate, 12. V-string lower plate, 13. steel connector I, 14. clamping groove I, 2. crossarm upper clamp, 21. crossarm upper clamp main body, 22. steel connector II, 3. knife-like clamp, 31. clamping groove II, 4. mechanical transmission screw rod, 5. hydraulic device, 6. V-string yoke plate, 7. insulation pulling rod, and 8. crossarm wrapper plate.
DETAILED DESCRIPTION
[0021] The present application will be illustrated in detail hereinafter in conjunction with the accompanying drawings and the embodiments.
= 10 [0022] A maintenance tool for a double insulator strings on a direct current transmission line includes a clamping device configured to be clamped at two sides of the double insulator strings and a tension device configured to be connected between the clamping device.
The clamping device includes a V-string upper clamp 1, a crossarm upper clamp 2 and a knife-like clamp 3. The V-string upper clamp, the crossarm upper clamp and the knife-like clamp are made of a LC4 aluminum alloy material which has a high strength, a light weight, a good plasticity, and facilitates working high above the ground.
[0023] The V-string upper clamp 1 is fixedly connected on a fitting-hanging point angle steel at a side of a tower body, and the structure of the V-string upper clamp is shown in Figure 3. The V-string upper clamp includes a V-string upper plate 11, a V-string lower plate 12 and a steel connector I 13. The fitting-hanging point angle steel on the side of the tower body is located between the V-string upper plate 11 and the V-string lower plate 12. An inner end face of the V-string upper plate 11 is provided with a clamping groove I corresponded to the fitting-hanging point angle steel at the side of the tower body, and an outer end face of the V-string lower plate 12 is articulated with the steel connector I 13. The other end of the steel connector I is formed with a pin hole for connecting the tension device. Two ends of the V-string upper plate are respectively connected with two ends of the V-string lower plate via bolts.
[0024] The crossarm upper clamp 2 is fixedly connected to a crossarm wrapper plate 8, and the structure of the crossarm upper clamp is shown in Figure 4 which includes a crossarm upper clamp main body 21 and a steel connector II 22 movably connected with the crossarm upper clamp main body. The crossarm upper clamp includes two triangular aluminum alloy plates arranged corresponded to each other, the steel connector II is located between the two triangular = 4 aluminum alloy plates, and one end of the steel connector II is movably connected with one corner of each of the two triangular aluminum alloy plates via a pin shaft.
The triangular aluminum alloy plate is formed with a pin hole corresponded to a connecting hole on the crossarm wrapper plate. For connecting the elements, the crossarm wrapper plate is inserted between the two triangular aluminum alloy plates, and thus is fixedly connected to pin holes of the aluminum alloy plates via a bolt.
[0025] The knife-like clamp 3 is fixedly connected to a V-string yoke plate 6, and the structure of the knife-like clamp is shown in Figure 5 and Figure 6. The handle end of the knife-like clamp 4 is provided with a pin hole for connecting the tension device, and the head end of the knife-like clamp is formed with a clamping groove II for mounting the V-string yoke plate. The head end portion and two side walls of the clamping groove II are configured to have a bend shape. While using the knife-like clamp, the V-string yoke plate 87 is inserted into the clamping groove II, and the bends at the head end is hooked to the bolt on the V-string yoke plate;
meanwhile, a pulling force, the direction of which is opposite to that of the force applied to the bolt, is exerted on the handle end of the knife-like clamp, thereby the knife-like clamp is fixedly connected with the V-string yoke plate.
[0026] The tension device is connected between the V-string upper clamp and the knife-like clamp, or between the crossarm upper clamp and the knife-like clamp. The tension device is a combination of the mechanical transmission screw rod 4 and the hydraulic device 5, and the mechanical transmission screw rod and the hydraulic device are connected via an insulation pulling rod 7.
[0027] While the present application is used to replace the double insulator strings on a 660kV
direct current transmission line, different compositions are made based on the inner string or the outer string to be replaced.
[0028] While replacing the inner string of the double insulator strings, a combination of the V-string upper clamp, the knife-like clamp and the tension device is used, as shown in Figure 1.
[0029] Firstly, the V-string yoke plate 6 is inserted into the clamping groove II of the knife-like clamp such that the bends at the head end portion are hooked to the bolt on the V-string yoke plate. Meanwhile, a pulling force which is opposite to the direction of the force exerted on the bolt is applied to the handle end of the knife-like clamp, to thereby fixedly connecting the knife-like clamp with the V-string yoke plate.
[0030] The fitting-hanging point angle steel at the side of the tower body is located between the =
V-string upper plate and the V-string lower plate such that the vertical end of the angle steel is clamped in the clamping groove I of the V-string upper plate. Then two ends of the V-string upper plate are fixedly connected with two ends of the V-string lower plate by bolts.
[0031] Next is the assembling of the tension device. One end of the hydraulic device is movable connected to the end of the steel connector I, which has a pin hole, of the V-string upper clamp via a pin shaft, and the other end of the hydraulic device is fixedly connected to one end of the mechanical transmission screw rod via an insulation pulling rod, and the other end of the mechanical transmission screw rod is movably connected to the pin hole of the handle end of the knife-like clamp via a pin shaft.
[0032] After the connecting operation is finished, the screw rod is tightened or the hydraulic device is actuated to thereby tension the V-string upper clamp and the knife like clamp, such that the inner string insulator is relaxed and no tension force is applied thereon.
Thereby the inner string may be replaced.
[0033] While replacing the outer string of the double insulator strings, a combination of the = 15 crossarm upper clamp, the knife-like clamp and the tension device is used, as shown in Figure 2.
[0034] Firstly, the V-string yoke plate 6 is inserted in the clamping groove II of the knife-like clamp, and the bends at the head end portion are hooked to the bolt on the V-string yoke plate.
Meanwhile, a pulling force which is opposite to the direction of the force exerted on the bolt is applied to the handle end of the knife-like clamp, to thereby fixedly connecting the knife-like clamp with the V-string yoke plate.
[0035] The crossarm wrapper plate 8 is inserted between the two triangular aluminum alloy plates of the crossarm upper clamp such that the pin holes on the aluminum alloy plates are corresponded to the position of the connecting hole on the crossarm wrapper plate. Then a bolt is inserted in the pin holes and the connecting hole such that the crossarm upper clamp is fixedly connected on the crossarm wrapper plate.
[0036] Then one end of the hydraulic device is movably connected to the end of the steel connector II, which has a pin hole, of the crossarm upper clamp via a pin shaft, and the other end of the hydraulic device is fixedly connected to one end of the mechanical transmission screw rod via an insulation pulling rod, and the other end of the mechanical transmission screw rod is movably connected to the pin hole of the handle end of the knife-like clamp via a pin shaft.
[0037] After the connecting operation is finished, the screw rod is tightened or the hydraulic device is actuated to thereby tension the crossarm upper clamp and the knife-like clamp, such that the outer insulator string is relaxed and no tension force is applied thereon.
Thereby the outer string may be replaced.
= 10 [0022] A maintenance tool for a double insulator strings on a direct current transmission line includes a clamping device configured to be clamped at two sides of the double insulator strings and a tension device configured to be connected between the clamping device.
The clamping device includes a V-string upper clamp 1, a crossarm upper clamp 2 and a knife-like clamp 3. The V-string upper clamp, the crossarm upper clamp and the knife-like clamp are made of a LC4 aluminum alloy material which has a high strength, a light weight, a good plasticity, and facilitates working high above the ground.
[0023] The V-string upper clamp 1 is fixedly connected on a fitting-hanging point angle steel at a side of a tower body, and the structure of the V-string upper clamp is shown in Figure 3. The V-string upper clamp includes a V-string upper plate 11, a V-string lower plate 12 and a steel connector I 13. The fitting-hanging point angle steel on the side of the tower body is located between the V-string upper plate 11 and the V-string lower plate 12. An inner end face of the V-string upper plate 11 is provided with a clamping groove I corresponded to the fitting-hanging point angle steel at the side of the tower body, and an outer end face of the V-string lower plate 12 is articulated with the steel connector I 13. The other end of the steel connector I is formed with a pin hole for connecting the tension device. Two ends of the V-string upper plate are respectively connected with two ends of the V-string lower plate via bolts.
[0024] The crossarm upper clamp 2 is fixedly connected to a crossarm wrapper plate 8, and the structure of the crossarm upper clamp is shown in Figure 4 which includes a crossarm upper clamp main body 21 and a steel connector II 22 movably connected with the crossarm upper clamp main body. The crossarm upper clamp includes two triangular aluminum alloy plates arranged corresponded to each other, the steel connector II is located between the two triangular = 4 aluminum alloy plates, and one end of the steel connector II is movably connected with one corner of each of the two triangular aluminum alloy plates via a pin shaft.
The triangular aluminum alloy plate is formed with a pin hole corresponded to a connecting hole on the crossarm wrapper plate. For connecting the elements, the crossarm wrapper plate is inserted between the two triangular aluminum alloy plates, and thus is fixedly connected to pin holes of the aluminum alloy plates via a bolt.
[0025] The knife-like clamp 3 is fixedly connected to a V-string yoke plate 6, and the structure of the knife-like clamp is shown in Figure 5 and Figure 6. The handle end of the knife-like clamp 4 is provided with a pin hole for connecting the tension device, and the head end of the knife-like clamp is formed with a clamping groove II for mounting the V-string yoke plate. The head end portion and two side walls of the clamping groove II are configured to have a bend shape. While using the knife-like clamp, the V-string yoke plate 87 is inserted into the clamping groove II, and the bends at the head end is hooked to the bolt on the V-string yoke plate;
meanwhile, a pulling force, the direction of which is opposite to that of the force applied to the bolt, is exerted on the handle end of the knife-like clamp, thereby the knife-like clamp is fixedly connected with the V-string yoke plate.
[0026] The tension device is connected between the V-string upper clamp and the knife-like clamp, or between the crossarm upper clamp and the knife-like clamp. The tension device is a combination of the mechanical transmission screw rod 4 and the hydraulic device 5, and the mechanical transmission screw rod and the hydraulic device are connected via an insulation pulling rod 7.
[0027] While the present application is used to replace the double insulator strings on a 660kV
direct current transmission line, different compositions are made based on the inner string or the outer string to be replaced.
[0028] While replacing the inner string of the double insulator strings, a combination of the V-string upper clamp, the knife-like clamp and the tension device is used, as shown in Figure 1.
[0029] Firstly, the V-string yoke plate 6 is inserted into the clamping groove II of the knife-like clamp such that the bends at the head end portion are hooked to the bolt on the V-string yoke plate. Meanwhile, a pulling force which is opposite to the direction of the force exerted on the bolt is applied to the handle end of the knife-like clamp, to thereby fixedly connecting the knife-like clamp with the V-string yoke plate.
[0030] The fitting-hanging point angle steel at the side of the tower body is located between the =
V-string upper plate and the V-string lower plate such that the vertical end of the angle steel is clamped in the clamping groove I of the V-string upper plate. Then two ends of the V-string upper plate are fixedly connected with two ends of the V-string lower plate by bolts.
[0031] Next is the assembling of the tension device. One end of the hydraulic device is movable connected to the end of the steel connector I, which has a pin hole, of the V-string upper clamp via a pin shaft, and the other end of the hydraulic device is fixedly connected to one end of the mechanical transmission screw rod via an insulation pulling rod, and the other end of the mechanical transmission screw rod is movably connected to the pin hole of the handle end of the knife-like clamp via a pin shaft.
[0032] After the connecting operation is finished, the screw rod is tightened or the hydraulic device is actuated to thereby tension the V-string upper clamp and the knife like clamp, such that the inner string insulator is relaxed and no tension force is applied thereon.
Thereby the inner string may be replaced.
[0033] While replacing the outer string of the double insulator strings, a combination of the = 15 crossarm upper clamp, the knife-like clamp and the tension device is used, as shown in Figure 2.
[0034] Firstly, the V-string yoke plate 6 is inserted in the clamping groove II of the knife-like clamp, and the bends at the head end portion are hooked to the bolt on the V-string yoke plate.
Meanwhile, a pulling force which is opposite to the direction of the force exerted on the bolt is applied to the handle end of the knife-like clamp, to thereby fixedly connecting the knife-like clamp with the V-string yoke plate.
[0035] The crossarm wrapper plate 8 is inserted between the two triangular aluminum alloy plates of the crossarm upper clamp such that the pin holes on the aluminum alloy plates are corresponded to the position of the connecting hole on the crossarm wrapper plate. Then a bolt is inserted in the pin holes and the connecting hole such that the crossarm upper clamp is fixedly connected on the crossarm wrapper plate.
[0036] Then one end of the hydraulic device is movably connected to the end of the steel connector II, which has a pin hole, of the crossarm upper clamp via a pin shaft, and the other end of the hydraulic device is fixedly connected to one end of the mechanical transmission screw rod via an insulation pulling rod, and the other end of the mechanical transmission screw rod is movably connected to the pin hole of the handle end of the knife-like clamp via a pin shaft.
[0037] After the connecting operation is finished, the screw rod is tightened or the hydraulic device is actuated to thereby tension the crossarm upper clamp and the knife-like clamp, such that the outer insulator string is relaxed and no tension force is applied thereon.
Thereby the outer string may be replaced.
Claims (5)
1. A maintenance tool for a double insulator strings on a direct current V
transmission line, comprising a clamping device configured to be clamped at two sides of the double insulator strings and a tension device configured to be connected between the clamping device, wherein the clamping device comprises: a V-string upper clamp (1) fixedly connected to a fitting-hanging point angle steel at a side of a tower body, a crossarm upper clamp (2) fixedly connected to a crossarm wrapper plate and a knife-like clamp (3) fixedly connected to a V-string yoke plate; and the tension device is a mechanical transmission screw rod.
transmission line, comprising a clamping device configured to be clamped at two sides of the double insulator strings and a tension device configured to be connected between the clamping device, wherein the clamping device comprises: a V-string upper clamp (1) fixedly connected to a fitting-hanging point angle steel at a side of a tower body, a crossarm upper clamp (2) fixedly connected to a crossarm wrapper plate and a knife-like clamp (3) fixedly connected to a V-string yoke plate; and the tension device is a mechanical transmission screw rod.
2. The maintenance tool for the double insulator strings on the direct current transmission line according to claim 1, wherein the V-string upper clamp (1) comprises a V-string upper plate (11) and a V-string lower plate (12) located at two sides of the fitting-hanging point angle steel at the side of the tower body, and wherein an inner end face of the V-string upper plate (11) is provided with a clamping groove I (14) corresponded to the fitting-hanging point angle steel at the side of the tower body, an outer end face of the V-string lower plate (12) is articulated with a steel connector I (13), and the other end of the steel connector I is provided with a pin hole for connecting the tension device; and two ends of the V-string upper plate are connected with two ends of the V-string lower plate via bolts.
3. The maintenance tool for the double insulator strings on the direct current transmission line according to claim 1, wherein the crossarm upper clamp (2) comprises a crossarm upper clamp main body (21) and a steel connector II (22) articulated with the crossarm upper clamp main body (21) for connecting the tension device, and the crossarm upper clamp main body is provided with a bolt hole corresponded to a connecting hole of the crossarm wrapper plate.
4. The maintenance tool for the double insulator strings on the direct current transmission line according to claim 1, wherein a handle end of the knife-like clamp (3) is provided with a pin hole for connecting the tension device, the head end of the knife-like clamp is provided with a clamping groove II (31) for clamping the V-string yoke plate, and the head end portion and two side walls of the clamping groove II are configured to have a bend shape.
5. The maintenance tool for the double insulator strings on the direct current transmission line according to any one of claims 1 to 4, wherein the tension device includes a mechanical transmission screw rod and a hydraulic device connected to one end of the mechanical transmission screw rod.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020685278.4 | 2010-12-28 | ||
| CN2010206852784U CN202014055U (en) | 2010-12-28 | 2010-12-28 | Overhauling device of V-shaped double-string insulator for +-660KV direct current transmission line |
| PCT/CN2011/083183 WO2012088988A1 (en) | 2010-12-28 | 2011-11-29 | Maintenance tool used for double insulator strings of direct current transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2823137A1 true CA2823137A1 (en) | 2012-07-05 |
| CA2823137C CA2823137C (en) | 2015-08-11 |
Family
ID=44784666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2823137A Expired - Fee Related CA2823137C (en) | 2010-12-28 | 2011-11-29 | Maintenance tool used for double insulator strings of direct current transmission line |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN202014055U (en) |
| CA (1) | CA2823137C (en) |
| WO (1) | WO2012088988A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023302A (en) * | 2018-01-19 | 2018-05-11 | 浙江省送变电工程有限公司 | A kind of more changing device of insulator |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202014055U (en) * | 2010-12-28 | 2011-10-19 | 河北省电力公司超高压输变电分公司 | Overhauling device of V-shaped double-string insulator for +-660KV direct current transmission line |
| CN103618251A (en) * | 2013-11-27 | 2014-03-05 | 国家电网公司 | Technology for electrified overhaul of +-800kV ultrahigh voltage direct-current transmission line |
| CN103618250A (en) * | 2013-11-27 | 2014-03-05 | 国家电网公司 | Operating method for electrified replacement of double-V double-L insulator chains of extra-high voltage circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5377402A (en) * | 1993-10-27 | 1995-01-03 | Semple, Jr.; Alan R. | Electrical insulator change-out tool |
| JP3557311B2 (en) * | 1996-05-30 | 2004-08-25 | 中部電力株式会社 | Replacement method of V-suspended insulator and tool used in the method |
| CN201263063Y (en) * | 2008-07-21 | 2009-06-24 | 云南电网公司曲靖供电局 | Tool for replacing straight-line simply connected double-string overhang insulator |
| CN201629517U (en) * | 2009-12-15 | 2010-11-10 | 湖北省电力公司超高压输变电公司 | Large knife card of direct-current extra-high voltage line insulator string |
| CN102136695B (en) * | 2010-12-28 | 2012-11-28 | 河北省电力公司超高压输变电分公司 | Overhauling tool used for +/-660kV direct-current transmission line |
| CN202014055U (en) * | 2010-12-28 | 2011-10-19 | 河北省电力公司超高压输变电分公司 | Overhauling device of V-shaped double-string insulator for +-660KV direct current transmission line |
-
2010
- 2010-12-28 CN CN2010206852784U patent/CN202014055U/en not_active Expired - Fee Related
-
2011
- 2011-11-29 CA CA2823137A patent/CA2823137C/en not_active Expired - Fee Related
- 2011-11-29 WO PCT/CN2011/083183 patent/WO2012088988A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108023302A (en) * | 2018-01-19 | 2018-05-11 | 浙江省送变电工程有限公司 | A kind of more changing device of insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202014055U (en) | 2011-10-19 |
| WO2012088988A1 (en) | 2012-07-05 |
| CA2823137C (en) | 2015-08-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20130626 |
|
| MKLA | Lapsed |
Effective date: 20171129 |
|
| MKLA | Lapsed |
Effective date: 20171129 |