AU2019203268A1 - General closed type clamp means for replacing uhv insulators - Google Patents
General closed type clamp means for replacing uhv insulators Download PDFInfo
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- AU2019203268A1 AU2019203268A1 AU2019203268A AU2019203268A AU2019203268A1 AU 2019203268 A1 AU2019203268 A1 AU 2019203268A1 AU 2019203268 A AU2019203268 A AU 2019203268A AU 2019203268 A AU2019203268 A AU 2019203268A AU 2019203268 A1 AU2019203268 A1 AU 2019203268A1
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- Prior art keywords
- clamp
- bushing
- lead screw
- hydraulic
- upper cover
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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
Abstract
Abstract The invention discloses a general closed type clamp for replacing UHV insulators. The general closed type clamp for replacing UHV insulators comprises a 5 front clamp, a rear clamp and tensioning devices, wherein the tensioning devices are arranged between the front clamp and the rear clamp, two ends of each of the tensioning devices are connected with the front clamp and the rear clamp, and the tensioning devices are used for adjusting the distance between the front clamp and the rear clamp when replacing insulators and can exert tensioning force on the front 10 clamp and the rear clamp. A first bushing is arranged in the front clamp, a second bushing is arranged in the rear clamp, and the shape of inner surfaces of the first bushing and the second bushing is matched with that of steel caps of insulators clamped in the front clamp and the rear clamp. The general closed type clamp for replacing UHV insulators comprises the front clamp and the rear clamp with good 15 strength and light weight, can adapt to insulators of different models, solves the problem of the stroke and poor loading capacity of the tensioning devices via hydraulic and mechanical combined lead screws, and reduces the length of the lead screws, thereby facilitating site carrying and lifting as well as storing in warehouses, being capable of effectively reducing the labor intensity of operators working aloft 20 and improving the working efficiency. Figure 1
Description
GENERAL CLOSED TYPE CLAMP MEANS FOR REPLACING UHV INSULATORS
Technical Field
The invention relates to the technical field of servicing tools of high-voltage transmission lines, in particular to a general closed type clamp means for replacing UHV insulators.
Background
Currently, the global energy internet with the UHV grid as the backbone framework has risen to a level of national strategy, and safe and stable operation of the UHV lines is the core work of grid operation and maintenance. During operation, bearing changing mechanical load from self weight of wires, wind, ice and snow, environment temperature, etc, as well as the influence of lightning, attached dirt and external force damage, UHV insulators are apt to be damaged, which influences safe and stable operation of lines. As the UHV lines face difficulty in power-off working once start operating, live replacement of UHV insulators has become a necessary measure for guaranteeing safe and stable operation of the UHV transmission lines.
Compared with super high voltage lines, the UHV lines face greatly increased line load and self weight of insulators. The prior clamps for replacing large-tonnage insulators are heavy and inconvenient to operate, and one type of clamps is only applicable to a specific type of insulators, with poor generality. Furthermore, the clamps have weak load bearing capacity and cannot effectively guarantee safety of live replacement. The prior stringing tools mainly include hydraulic tighteners and lead screw tighteners, both of which have defects. The hydraulic tighteners have a big tension tonnage but have problems of being difficult to use in the effective space due to big size and heavy weight. The lead screw tighteners are convenient to operate but are limited in tension tonnage. As not any prior tool can meet the replacement requirement of UHV large-tonnage insulators, there is an urgent need for live working tools of UHV lines.
2019203268 09 May 2019
Summary
According to a first aspect, there is provided clamp means for replacing UHV insulators, comprising a front clamp, a rear clamp and a tensioning device, wherein the tensioning device is arranged between the front clamp and the rear 5 clamp, one end of the tensioning device is connected with the front clamp and the other end of the tensioning device is connected with the rear clamp and the tensioning device is used for adjusting a distance between the front clamp and the rear clamp during replacement of the insulators and can exert a tensioning force on the front clamp and the rear clamp; a first bushing is arranged in the front io clamp, a second bushing is arranged in the rear clamp, wherein the front clamp comprises a first upper cover and a first base, one end of the first upper cover is in rotatable connection with one end of the first base, and the other end of the first upper cover is in movable connection with the other end of the first base, and the first bushing comprises a semi-annular first left bushing and a semi-annular first 15 right bushing; a first upper semi-circular through slot is arranged on the lower end surface of the first upper cover, and a first lower semi-circular through slot is arranged on the first base; the first left bushing and the first right bushing are respectively arranged in and are in interference fit with the first upper semicircular through slot and the first lower semi-circular through slot, and wherein 20 the rear clamp comprises a second upper cover and a second base, wherein one end of the second upper cover is in rotatable connection with one end of the second base, and the other end of the second upper cover is in movable connection with the other end of the second base, the second bushing comprises a semi-annular second left bushing and a semi-annular second right bushing; a 25 second upper semi-circular through slot is arranged on the lower end surface of the second upper cover, and a second lower semi-circular through slot is arranged on the second base; the second left bushing and the second right bushing are respectively arranged in and are in interference fit with the second upper semicircular through slot and the second lower semi-circular through slot.
In one form, a first magnet is embedded in the first bushing and a second magnet is embedded in the second bushing.
In one form, a first groove is formed in an inner wall of the first bushing and a second groove is formed in an inner wall of the second bushing both in the circumferential direction at an equal spacing, and the first magnet is arranged in
2019203268 09 May 2019 the first groove and the second magnet is arranged in the second groove.
In one form, each of the front clamp and the rear clamp comprises a bolt, a pin shaft and an elastic collar; one end of the first upper cover is hinged to one end of the first base through the pin shaft, and the other end of the first upper 5 cover is connected with the other end of the first base through the bolt and the elastic collar; one end of the second upper cover is hinged to one end of the second base through the pin shaft, and the other end of the second upper cover is connected with the other end of the second base through the bolt and the elastic collar.
io In one form, the bolts and pin shafts are made of a high-strength steel.
In one form, the first upper cover, the first base, the second upper cover and the second base are made of carbon fiber composites.
In one form, the first left bushing, the first right bushing, the second left bushing and the second right bushing are made of a titanium alloy.
In one form, the tensioning device comprises a mechanical lead screw and a hydraulic transmission mechanism; one end of the mechanical lead screw is in threaded connection with one end of the hydraulic transmission mechanism, the other end of the mechanical lead screw is in bolted connection with the front clamp, and the other end of the hydraulic transmission mechanism is connected 20 with the rear clamp; the hydraulic transmission mechanism and the mechanical lead screw exert the tensioning force onto the front clamp and the rear clamp.
In one form, the clamp means further comprises a second tensioning device, wherein the second tensioning device is arranged between the front clamp and the rear clamp, one end of the tensioning device is connected with the front clamp 25 and the other end of the tensioning device is connected with the rear clamp, respectively, wherein the tensioning devices are used for adjusting a distance between the front clamp and the rear clamp during replacement of the insulators and can exert a tensioning force on the front clamp and the rear clamp wherein the two tensioning devices are in bolted connection with left ends and right ends of 30 the front clamp and the rear clamp respectively
In one form, the mechanical lead screw comprises a first lead screw, a second lead screw and a regulation tube, wherein the thread directions of the first
2019203268 09 May 2019 lead screw and the second lead screw are reverse; the upper end of the first lead screw is fixedly connected with the front clamp, and the lower end of the second lead screw is fixedly connected with the hydraulic transmission mechanism; two ends of the regulation tube sleeve at the lower end of the first lead screw and the 5 upper end of the second lead screw, respectively, and threads spirally engaged with the first lead screw and the second lead screw are arranged on an inner wall of a first regulation tube.
In one form, a rotating tube sleeves on an outer wall of the regulation tube, and a mechanical operating handle is arranged on the rotating tube.
In one form, the hydraulic transmission mechanism is a hydraulic oil cylinder; the lower end of the second lead screw is in threaded connection with a tail portion of a cylinder body of the hydraulic oil cylinder, and a telescopic rod of the hydraulic oil cylinder is fixedly connected with the rear clamp.
In one form, the hydraulic oil cylinder further comprises a spring and a 15 piston; the cylinder body is divided into an upper hydraulic chamber and a lower hydraulic chamber via the piston; the spring is located in the upper hydraulic chamber, with its length direction consistent with that of the upper hydraulic chamber; the upper end of the telescopic rod is connected with the piston, and the lower end of the telescopic rod penetrates through the wall at the bottom of the 20 lower hydraulic chamber and is fixedly connected with the rear clamp.
In one form, a seal ring is provided at a mounting hole for the telescopic rod at the wall at the bottom of the lower hydraulic chamber.
In one form, the hydraulic oil cylinder comprises a hydraulic operating handle and a first hydraulic oil chamber, wherein the hydraulic operating handle is 25 installed on the cylinder body and hydraulic oil in the first hydraulic oil chamber is pressed into a lower hydraulic chamber by the hydraulic operating handle.
In one form, the hydraulic oil cylinder comprises an unloading one-way valve, wherein the unloading one-way valve is connected with the first hydraulic oil chamber and the lower hydraulic chamber; when the unloading one-way valve 30 is opened, pressurised oil in the first hydraulic oil chamber, under the effect of the hydraulic operating handle, flows into the lower hydraulic chamber through the unloading one-way valve to push the piston to move upwards and compress the spring, wherein the pressure of the oil in the first hydraulic oil chamber is
2019203268 09 May 2019 maintained by closing the unloading one-way valve; and when the unloading oneway valve is opened, under the effect of the spring, the pressurised oil in the lower hydraulic chamber flows into the first hydraulic oil chamber through the unloading one-way valve.
In one form, the lower end of the telescopic rod penetrates through the wall at the bottom of the lower hydraulic chamber and is connected with the rear clamp through a bolt.
In one form, the rear clamp is formed therein with a bolt hole in which a titanium alloy bolt hole bushing is arranged.
io In one form, the lower end of the second lead screw is in threaded connection with the tail portion of the cylinder body of the hydraulic oil cylinder.
In one form, the upper end of the first lead screw is connected with the front clamp through a bolt.
In one form, the front clamp is provided therein with a bolt hole to be 15 engaged with a bolt and a titanium alloy bolt hole bushing is arranged in the bolt hole.
According to a second aspect, there is provided a method for replacing insulators by using the clamp means for replacing UHV insulators comprising the following steps:
an electrician on the ground transfers a front clamp and a rear clamp to an operator working aloft through an insulating transfer rope; the operator working aloft opens a first bushing, fixedly attaches (by attraction) magnets on a first left bushing and a first right bushing onto a steel cap of a first insulator, and closes the first bushing; opens the first cover of the front clamp, places the first left bushing to the semi-circular through slot of the lower end surface of the first upper cover, places the first right bushing to the semi-circular through slot of the upper end surface of the first base, fastens the first upper cover and the first base through the bolts, maintains that the opening/closing direction of the first upper cover and the first base is perpendicular to that of the first left bushing and the first right bushing, such that the breaking force of the fist bushing is perpendicular to that of the first upper cover and the first base, so the overall stressing of the front clamp is better; the operator working aloft equipotentially opens the second bushing,
2019203268 09 May 2019 fixedly attaches (by attraction) magnets on the second left bushing and the second right bushing onto a steel cap of the second insulator, closes the second bushing, opens the second upper cover of the front clamp, places the semi-circular through slot of the lower end surface of the second upper cover onto the second left 5 bushing and the semi-circular through slot of the upper end surface of the second base onto the second right bushing, fastens the second upper cover and the second base through bolts, maintains that the opening/closing direction of the second upper cover and the second base is perpendicular to that of the second left bushing and the second right bushing, such that the breaking force of the second bushing io is perpendicular to that of the second upper cover and the second base, so the overall stressing of the rear clamp is better; the electrician on the ground installs two tensioning devices on the ground, wherein two ends of the regulation tube sleeve at the lower end of the first lead screw and the upper end of the second lead screw, respectively, and the lower end of the second lead screw is in threaded 15 connection with the tail portion of the hydraulic oil cylinder; and the electrician on the ground sequentially transfers the two tensioning devices to the operator working aloft equipotentially via the insulating transfer rope; the operator working aloft equipotentially connects two ends of the two tensioning devices with the left ends and the right ends of the front clamp and the rear clamp, 20 wherein the telescopic rod of the hydraulic oil cylinder is connected with the rear clamp through a bolt, and the upper end of the first lead screw is connected with the front clamp through the bolt; the operator working aloft equipotentially operates the mechanical operating handles of the mechanical lead screws of the tensioning devices simultaneously, tensions the two mechanical lead screws until 25 an insulator string is in the tightened state preliminarily, and then the operator working aloft equipotentially checks and confirms that the first insulator and the second insulator are well installed and connected with all parts of the clamp means; the operator working aloft equipotentially operates the hydraulic operating handles of hydraulic transmission mechanisms of the two tensioning devices 30 simultaneously, and continues to tension the two tensioning devices until an insulator to be replaced which is located below the first insulator or above the second insulator is loosened; the operator working aloft equipotentially demounts the replaced insulator and transfers it to the electrician on the ground with the rope; then the electrician on the ground hoists a new insulator by the insulating 35 transfer rope and transfers it to the operator working aloft equipotentially; the
2019203268 09 May 2019 operator working aloft equipotentially installs the new insulator into the position for replacement, then operates the hydraulic operating handle of the two tensioning devices to loosen the two tensioning devices, and then operates the mechanical operating handles of the two tensioning devices until the two 5 tensioning devices are in a loosened and demountable state; the operator working aloft equipotentially demounts the two tensioning devices, the front clamp and the rear clamp in sequence, and transfers them to the ground via the insulating transfer rope.
An electrician on the ground transfers the front clamp and the rear clamp to 10 an operator working aloft through an insulating transfer rope, and the operator working aloft opens the first bushing, fixedly adsorbs magnets on the first left bushing and the first right bushing on a steel cap of a first insulator, and closes the first bushing; the operator working aloft opens the first cover of the front clamp, places the first left bushing in the semi-circular through slot disposed on the lower 15 end surface of the first upper cover, places the first right bushing in the semicircular through slot disposed on the upper end surface of the first base, fastens the first upper cover and the first base through the bolts, maintains that the opening/closing direction of the first upper cover and the first base is perpendicular to that of the first left bushing and the first right bushing and that 20 the breaking force of the fist bushing is perpendicular to that of the first upper cover and the first base, so the overall stressing of the front clamp is better; the operator working aloft opens the second bushing, fixedly adsorbs magnets on the second left bushing and the second right bushing on steel caps of the second insulator, closes the second bushing, opens the second upper cover of the front 25 clamp, places the semi-circular through slot disposed on the lower end surface of the second upper cover on the second left bushing and the semi-circular through slot disposed on the upper end surface of the second base on the second right bushing, fastens the second upper cover and the second base through bolts, maintains that the opening/closing direction of the second upper cover and the 30 second base is perpendicular to that of the second left bushing and the second right bushing and that the breaking force of the second bushing is perpendicular to that of the second upper cover and the second base, so the overall stressing of the rear clamp is better; the electrician on the ground installs two tensioning devices, wherein two ends of the regulation tube sleeve at the lower end of the first lead 35 screw and the upper end of the second lead screw respectively, and the lower end
2019203268 09 May 2019 of the lower end of the second lead screw is in threaded connection with the tail portion of the hydraulic oil cylinder; and the electrician on the ground sequentially transfers the two tensioning devices to operators working aloft via the insulating transfer rope; the electrician on the ground connects two ends of each of the two tensioning devices with the left end and the right end of each of the front clamp and the rear clamp, wherein the telescopic rod of the hydraulic oil cylinder is connected with the rear clamp through a bolt, and the upper end of the first lead screw is connected with the front clamp through the bolt; the equipotential operator working aloft operates mechanical operating handles of mechanical lead screws of the tensioning devices simultaneously, tensions the two mechanical lead screws until an insulator string is in the tightened state preliminarily, and then checks and confirms that the first insulator and the second insulator are well connected with all parts of the clamp; the equipotential operator working aloft operates mechanical operating handles of hydraulic transmission mechanisms of the tensioning devices simultaneously, and continues to tension the two mechanical lead screws until a to-be-replaced insulator located below the first insulator or above the second insulator loosens; the equipotential operator demounts the to-be-replaced insulator and transfers the insulator to the electrician on the ground with the rope; the electrician on the ground lifts and transfers a new insulator to the equipotential operator working aloft via the insulating transfer rope; the equipotential operator working aloft installs the new insulator at the replacing position, operates the hydraulic operating handles of the two tensioning devices to loosen the tensioning devices, and then operates the mechanical operating handles of the tensioning devices until the two tensioning devices are located in the loosening and demountable state; the equipotential operator working aloft demounts the two tensioning devices, the front clamp and the rear clamp in sequence, and transfers them to the ground via the insulating transfer rope.
The clamp means for replacing UHV insulators and the use method thereof according to the present disclosure ensure that the working load of the clamp meets safety requirements of regulations; furthermore, the front clamp and rear clamp in small size are formed, which ensures that the UHV large-tonnage insulator string can be replaced successfully on site with limited space structure size. The first bushing and the second bushing have different sizes and are applicable to replacement of insulators of different models, so adaptability of the
2019203268 09 May 2019 clamp is improved. The front clamp and the rear clamp are made of carbon fibers, so weight of the single front clamp or rear clamp is significantly reduced, on-site carrying and installation and demounting at heights are facilitated, the practicality of the clamp is ensured, and safety of on-site working aloft is improved.
Brief Description of the Drawings
To clearly explain the technical scheme of the embodiment of the invention or of the prior art, attached drawings needed to be used in the embodiment are briefly introduced. Apparently, the following attached drawings are some io embodiments of the invention. For those skilled in the field, other attached drawings can be obtained on the basis of these one on the premise of not paying creative work.
Figure 1 is a schematic diagram of a general closed type clamp means for replacing UHV insulators according to an embodiment of the present invention;
Figure 2 is a front view of a front clamp in a general closed type clamp for replacing UHV insulators according to an embodiment of the present invention;
Figure 3 is a top view of a front clamp in a general closed type clamp for replacing UHV insulators according to an embodiment of the present invention;
Fire 4 is a schematic diagram showing the practical application of a general 20 closed type clamp for replacing UHV insulators according to an embodiment of the present invention;
Figure 5 is an exploded schematic diagram of a tensioning device of a general closed type clamp for replacing UHV insulators according to an embodiment of the present invention;
Figure 6 is a schematic diagram of an insulator on which a general closed type clamp for replacing UHV insulators according to the present invention acts.
Detailed Description of the Invention
Herein the technical solution of the embodiment of the invention will be 30 described clearly and completely by combining the drawings in the embodiment.
It is apparent that the embodiments are only a part of the invention, not all embodiments of the invention. Based on the embodiments, all other embodiments
2019203268 09 May 2019 obtained by those skilled in the field without any creative work belong to the protection scope of the invention.
UHV refers to ± 800 KV and above AC and DC voltage. UHV insulators are large-tonnage insulators commonly used on UHV power transmission and 5 transformation equipments, and it is difficult for the traditional clamp means to replace the large-tonnage insulators. With increase in the operating time of the UHV transmission lines, there will be many problems like insulator ageing, damage and performance degradation. However, prior clamp means for replacing insulators can neither solve the problems in time nor meet the demand for UHV 10 equipment repair, which seriously restrains and influences normal maintenance and repair work of UHV power transmission and transformation equipment in operation currently
Left, right, upper and lower described hereafter are consistent with those directions in the drawings. The front end and the back end or tail end refer to the 15 left and right in the drawings.
As shown in Figures 1-5, the invention provides a general closed type clamp means for replacing UHV insulators which relates to a closed type clamp means. It comprises a front clamp 1, a rear clamp 2 and tensioning devices 3 and 4. The tensioning devices are arranged between the front clamp 1 and the rear clamp 2, 20 with two ends of the tensioning device 3, 4 being connected with the front clamp and the rear clamp, respectively, are used for adjusting a distance between the front clamp 1 and the rear clamp 2 during replacement of the insulators and can exert a tensioning force on the front clamp 1 and the rear clamp 2.
The number of the tensioning devices may be set according to the specific 25 requirements, such as 1, 2, 3 or more. As shown in Figures 2 and 3, a first bushing 15 is arranged in the front clamp 1, a second bushing is arranged in the rear clamp, and the inner surfaces of the first bushing 15 and the second bushing are matched in shape with steel caps of insulators clamped in the front clamp 1 and the rear clamp 2.
The structures of the front clamp 1 and the rear clamp 2 may be the same and may be provided with different bushings according to models of specific insulators. By arranging the bushings in the front clamp 1 and the rear clamp 2, the closed type clamp means can be applied to insulators of different models and io
2019203268 09 May 2019 at different power transmission levels.
In an embodiment, magnets 20 are embedded in the first bushing 15 and the second bushing. For example, two grooves are formed in the inner wall of the first bushing 15 and the inner wall of the second bushing in the circumferential 5 direction at an equal spacing, and magnets 20 are arranged in the grooves. The shapes and structures of the first bushing 15 and the second bushing may be same or may be different according to difference in shape of specific insulators. The magnets 20 may attract to combine the steel cap 20 of the insulator such that the bushings can be prevented from falling during operation, and safety is improved.
As shown in Figures 2 and 3, the front clamp 1 comprises a first upper cover and a first base 14. One end of the first upper cover 12 is in rotatable connection with one end of the first base 14, and the other end of the first upper cover 12 is in movable connection with the other end of the first base 14. The first bushing 15 comprises a semi-annular first left bushing and a semi-annular first 15 right bushing.
The reference number 11 in Figure 2 indicates the opening/closing portion of the first bushing 15, and the reference number 17 indicates the opening/closing portion of the first upper cover and the first base. A first upper semi-circular through slot is arranged on the lower end surface of the first upper cover 14, and a 20 first lower semi-circular through slot is arranged on the first base. The first left bushing and the first right bushing are respectively arranged in and are in interference fit with the first upper semi-circular through slot and the first lower semi-circular through slot. After installation, it is ensured that the opening/closing direction of the first upper cover and the first base is perpendicular to that of the 25 first left bushing and the first right bushing, that is, the opening/closing portion 17 between the first upper cover and the first base is arranged to be in crossing relation with the opening/closing portion 11 of the first left bushing and the first right bushing 11, with a circumferential spacing of 90 degrees, such that the breaking force of the first bushing is perpendicular to that of the first upper cover 30 and the first base.
The structures of the front clampl and the rear clamp 2 are the same. The rear clamp 2 comprises a second upper cover and a second base. One end of the second upper cover is in rotatable connection with one end of the second base,
2019203268 09 May 2019 and the other end of the second upper cover is in movable connection with the other end of the second base. The second bushing comprises a semi-annular second left bushing and a semi-annular second right bushing. A second upper semi-circular through slot is arranged on the lower end surface of the second 5 upper cover, and a second lower semi-circular through slot is arranged on the second base; the second left bushing and the second right bushing are respectively arranged in and are in interference fit with the second upper semi-circular through slot and the second lower semi-circular through slot. The opening/closing portion between the second upper cover and the second base is arranged to be in crossing io relation with that of the second left bushing and the second right bushing, with a circumferential spacing of 90 degrees, such that the breaking force of the second bushing is perpendicular to that of the second upper cover and the second base.
The front clamp 1 comprises a bolt 16, a pin shaft 13 and an elastic collar.
One end of the first upper cover is hinged to one end of the first base 14 through 15 the pin shaft 13, and the other end of the first upper cover 12 is connected with the other end of the first base 14 through the bolt 16. A positioning pin 19 may be arranged at the connection portion of the other end of the first upper cover 12 and the other end of the first base 14.One end of the second upper cover of the rear clamp 2 is hinged to one end of the second base through the pin shaft, and the 20 other end of the second upper cover is connected with the other end of the second base through the bolt and the elastic collar.
The first upper cover 12, the first base 14, the second upper cover and the second base are made of carbon fiber composites, so strength can be improved and weight can be reduced. The carbon fiber composites may include many types. 25 For example, the carbon fiber composites with a certain thickness may be prepared by laying a layer of carbon fiber bidirectional prepreg cloth onto a layer of carbon fiber unidirectional prepreg cloth and then solidifying them. Dies are made according to shapes of the front clamp and the rear clamp. The carbon fiber composites in the dies are stamped in a mechanical processing method, and then 30 are bound and pressed layer by layer in a sequence of applying adhesives, laying the carbon fiber composites and stamping the carbon fiber composites in the dies, until the clamp means made of the carbon fiber composites is produced.
In an embodiment, the bolt 16 and the pin shafts 13, 19 are made of a highstrength steel; the first left bushing, the first right bushing, the second left bushing
2019203268 09 May 2019 and the second right bushing are made of a titanium alloy and are preferentially formed through wire cutting of an aeronautically forged titanium alloy material.
In an embodiment, the only difference between the front clamp and the rear clamp of the general closed type clamp means for replacing UHV insulators lies 5 in the inner bushing. A front clamp body and a rear clamp body are made of the carbon fiber composites such that the weight is reduced significantly. The general closed type clamp means for replacing UHV insulators facilitates working aloft, decreases the labor intensity of operators and improves the working efficiency.
Inner bushings made of titanium alloy are designed to be installed in carbon io fiber cavities of the front clamp and the rear clamp. The shapes of cavities of the inner bushings are matched with those of surfaces of steel caps of ceramic insulators, and magnets are designed in the inner bushings. During installation of the inner bushings, the magnets may be attached to the steel caps of the insulators, thereby having the effect of fixing the inner bushings preliminarily and preventing 15 the inner bushings from falling during the working process.
The diameters of outer edges of the inner bushings of the front clamp and the rear clamp are larger than that of carbon fiber cavity, so the inner bushings do not release from the clamp means body during the replacement of insulators and the stress distribution of the carbon fiber clamp means is improved. The 20 opening/closing direction of the inner bushings is perpendicular to that of the carbon fiber front clamp or the carbon fiber rear clamp, so the overall stress condition of the closed type clamp is optimized and its loading capacity is improved. The clamp may be applied to installation of different models of insulators by designing inner bushings of the front clamp and the rear clamp with 25 different dimensions, so the adaptability of the closed type clamp is enhanced. Connection holes are formed in a left ear and a right ear of the carbon fiber front clamp and the carbon fiber rear clamp, and titanium alloy hole sleeves are arranged in the connection holes, so the mechanical performance of the clamp means is improved and the operability and safety during working aloft are 30 improved.
In practical servicing, as shown in Figure 4, insulators 51 and 52 are installed to the front clamp 1 and the rear clamp 2, respectively, and the front clamp 1 and the rear clamp 2 are connected through the two tensioning devices. The operator
2019203268 09 May 2019 working aloft tightens the tensioning devices to transfer mechanical load on the insulators to be serviced, and uses a pin demounting tool to remove the insulators to be replaced, thereby realizing replacement and servicing of a single insulator. The two tensioning devices are used to serve as wire tensioning devices of the 5 closed type clamp means, which not only meets the stroke demand during clamp means installation but also meets the requirements for large tension of the insulator string and operation convenience.
The tensioning device comprises a mechanical lead screw and a hydraulic transmission mechanism. One end of the mechanical lead screw is connected with 10 one end of the hydraulic transmission mechanism, the other end of the mechanical lead screw is connected with the front clamp, and the other end of the hydraulic transmission mechanism is connected with the rear clamp. Tensioning force is exerted to the mechanical lead screw by the hydraulic transmission mechanism, so the length of the lead screw is shortened while ensuring the mounting or 15 demounting lengthiness, and further the weight of the whole clamp means is reduced.
In one embodiment, in replacement of the insulators, a double transmission system having the hydraulic transmission mechanism and the mechanical lead screw transmission mechanism is used to tighten the insulator string. The 20 mechanical lead screw transmission mechanism is used in the first step to achieve pre-tightening for a long distance and a low load, and the hydraulic transmission mechanism is then used in the second step to achieve tightening for a short distance and a high load.
The general closed type clamp means for replacing UHV insulators 25 according to the present invention combines advantages of the hydraulic transmission mechanism and the lead screw transmission mechanism. The combination of the hydraulic transmission mechanism and the lead screw transmission mechanism can significantly reduce the effective stroke of the hydraulic transmission mechanism, thereby reducing the length and weight of a 30 hydraulic pump and improving the convenience and efficiency of working aloft.
The general closed type clamp means for replacing UHV insulators according to the present invention may be stored in a separate way when it is not in use, so the replacement and maintenance of worn parts are facilitated.
2019203268 09 May 2019
As shown in Figures 4 and 5, the number of the tensioning devices is 2. Two ends of the two tensioning devices are connected with the left ends and the right ends of the front clamp 1 and the rear clamp 2 respectively. The mechanical lead screw comprises a first lead screw 31, a second lead screw 33 and a regulation 5 tube 32, wherein the thread directions of the first lead screw 31 and the second lead screw 33 are reverse. The upper end of the first lead screw 31 is fixedly connected with the front clamp 1, and the lower end of the second lead screw 33 is fixedly connected with the hydraulic transmission mechanism. Two ends of the regulation tube 32 sleeve at the lower end of the first lead screw 31 and the upper io end of the second lead screw 33, respectively, and threads spirally engaged with the first lead screw 31 and the second lead screw 33 are arranged on an inner wall of a first regulation tube 32.
A rotating tube sleeves on an outer wall of the regulation tube 32, and a mechanical operating handle 41 is arranged on the rotating tube. The mechanical 15 operating handle 41 is driven by a hand to make the regulation tube 32 rotate, and the first lead screw 31 and the second lead screw 33 move in the reverse directions, thereby tightening insulators above and below an insulator to be replaced and loosening the insulator to be replaced, and then the insulator can be replaced.
The hydraulic transmission mechanism may have many types, such as a hydraulic oil cylinder 45. The lower end of the second lead screw 33 is fixedly connected with a cylinder body of the hydraulic oil cylinder 45, and a telescopic rod 39 of the hydraulic oil cylinder is fixedly connected with the rear clamp 2. The hydraulic oil cylinder 45 further comprises a spring34 and a piston 42. The 25 cylinder body is divided into an upper hydraulic chamber 35 and a lower hydraulic chamber 37 via the piston 42. The spring 34 is located in the upper hydraulic chamber 35, with its length direction consistent with that of the upper hydraulic chamber 35. The upper end of the telescopic rod 39 is connected with the piston 42, and the lower end of the telescopic rod 39 penetrates through the 30 wall at the bottom of the lower hydraulic chamber 37 and is fixedly connected with the rear clamp 2 through an end head 40. A seal ring is provided at a mounting hole for the telescopic rod at the wall at the bottom of the lower hydraulic chamber 37.
The hydraulic oil cylinder comprises a hydraulic operating handle 36 and a
2019203268 09 May 2019 first hydraulic oil chamber 44, wherein the hydraulic operating handle 36 is installed on the cylinder body and hydraulic oil in the first hydraulic oil chamber 44 is pressed into a lower hydraulic chamber 37 by the hydraulic operating handle 36. The hydraulic oil cylinder further comprises an unloading one-way valve 38, 5 wherein the unloading one-way valve 38 is connected with the first hydraulic oil chamber 44 and the lower hydraulic chamber 37. When the unloading one-way valve 38 is opened, pressurised oil in the lower hydraulic chamber 37 flows into the first hydraulic oil chamber 44 through the unloading one-way valve 38 under the effect of the spring 34.
io The lower end of the telescopic rod 39 penetrates through the wall at the bottom of the lower hydraulic chamber and is connected with the rear clamp through a bolt. The rear clamp 2 is formed therein with a bolt hole in which a bolt hole bushing is arranged. The lower end of the second lead screw 33 is in threaded connection with the cylinder body of the hydraulic oil cylinder 45. The upper end of the first lead screw 31 is in bolted connection with the front clamp 1 through the end head 30. As shown in Figures 2 and 3, the front clamp 1 is provided therein with a bolt hole to be engaged with a bolt and a bolt hole bushing 18 is arranged in the bolt hole.
Liquid is pressed into the lower hydraulic chamber 37 of the cylinder body 20 and pushes the piston 42 upwards, and the piston 42 drives the telescopic rod 39 to move upwards to generate a tensioning effect. The piston 42 compresses the spring 34 while moving upwards. When the operation for replacing the insulator is completed, the unloading one-way valve 38 is opened, the spring 34 is restored to press the liquid out of the lower hydraulic chamber 37, so redundancy 25 adjustment is convenient during use, and the servicing person can operate conveniently during replacement of the insulator on the insulator string, and the work load is reduced.
In one embodiment, a spring 34 is arranged in the upper hydraulic chamber 35. When the hydraulic transmission mechanism conducts tensioning work, the 30 piston 42 moves inwards to compress the spring 34; when replacement of the insulator is completed, the liquid injection into the hydraulic chamber is stopped, the unloading one-way valve 38 is operated such that the spring 34 is restored to press liquid out of the lower hydraulic chamber 37, automatically releasing the telescopic rod 39, and the operators do not need to pull out the telescopic rod 39
2019203268 09 May 2019 with hands, and the labor intensity is reduced. At the same time, by placing the spring 34 in a cavity of a high-pressure pump, the overall length of the hydraulic transmission mechanism may be reduced, and the effective stroke of the hydraulic transmission mechanism is increased while reducing the weight of the hydraulic 5 transmission mechanism.
The lower end of the mechanical lead screw transmission mechanism is provided with a trapezoidal thread to be meshed with the upper end of the hydraulic transmission mechanism, thus avoiding failure in tensioning of the lead screw during working even under the effect of turning by the handle assembly. 10 Similarly, the clamp means replacing device may have a supporting function during the replacement of insulators.
According to the general closed type clamp means for replacing UHV insulators in the above embodiments, the front clamp and the rear clamp are made of high-strength and light-weight materials, which not only reduces the weight of 15 main parts of the clamp means significantly and improves the working efficiency of tool carrying and installation at heights during on-site operations, but also realizes replacement of the single insulator in the space of a limited structure of the insulator string by aid of the clamp means. The two sets of hydraulic and mechanical combined lead screws are used as the tensioning devices of the closed 20 type clamp, which not only meets the stroke demand during clamp means installation but also meets the requirements for large tension of the insulator string and operation convenience.
The invention provides a method for replacing UHV insulators by aid of the 25 general closed type clamp means for replacing UHV insulators as described above, comprising the following steps:
Step 1, an electrician on the ground transfers a front clamp and a rear clamp to an operator working aloft through an insulating transfer rope;
Step 2, the operator working aloft opens a first bushing, fixedly attaches (by 30 attraction) magnets on a first left bushing and a first right bushing onto a steel cap of a first insulator, and closes the first bushing; opens the first cover of the front clamp, places the first left bushing to the semi-circular through slot of the lower end surface of the first upper cover, places the first right bushing to the semi17
2019203268 09 May 2019 circular through slot of the upper end surface of the first base, fastens the first upper cover and the first base through the bolts, maintains that the opening/closing direction of the first upper cover and the first base is perpendicular to that of the first left bushing and the first right bushing, such that 5 the breaking force of the fist bushing is perpendicular to that of the first upper cover and the first base, so the overall stressing of the front clamp is better;
Step 3, the operator working aloft equipotentially opens the second bushing, fixedly attaches (by attraction) magnets on the second left bushing and the second right bushing onto a steel cap of the second insulator, closes the second bushing, io opens the second upper cover of the front clamp, places the semi-circular through slot of the lower end surface of the second upper cover onto the second left bushing and the semi-circular through slot of the upper end surface of the second base onto the second right bushing, fastens the second upper cover and the second base through bolts, maintains that the opening/closing direction of the second 15 upper cover and the second base is perpendicular to that of the second left bushing and the second right bushing, such that the breaking force of the second bushing is perpendicular to that of the second upper cover and the second base, so the overall stressing of the rear clamp is better;
Step 4, the electrician on the ground installs two tensioning devices on the 20 ground, wherein two ends of the regulation tube sleeve at the lower end of the first lead screw and the upper end of the second lead screw, respectively, and the lower end of the second lead screw is in threaded connection with the tail portion of the hydraulic oil cylinder; and the electrician on the ground sequentially transfers the two tensioning devices to the operator working aloft equipotentially 25 via the insulating transfer rope;
Step 5, the operator working aloft equipotentially connects two ends of the two tensioning devices with the left ends and the right ends of the front clamp and the rear clamp, wherein the telescopic rod of the hydraulic oil cylinder is connected with the rear clamp through a bolt, and the upper end of the first lead 30 screw is connected with the front clamp through the bolt;
Step 6, the operator working aloft equipotentially operates the mechanical operating handles of the mechanical lead screws of the tensioning devices simultaneously, tensions the two mechanical lead screws until an insulator string
2019203268 09 May 2019 is in the tightened state preliminarily, and then the operator working aloft equipotentially checks and confirms that the first insulator and the second insulator are well installed and connected with all parts of the clamp means;
Step 7, the operator working aloft equipotentially operates the hydraulic operating handles of hydraulic transmission mechanisms of the two tensioning devices simultaneously, and continues to tension the two tensioning devices until an insulator to be replaced which is located below the first insulator or above the second insulator is loosened;
Step 8, the operator working aloft demounts the replaced insulator and 10 transfers it to the electrician on the ground with the insulating rope;
Step 9, then the electrician on the ground hoists a new insulator by the insulating rope and transfers it to the operator working aloft;
Step 10, the operator working aloft equipotentially installs the new insulator into the position for replacement, then operates the hydraulic operating handle of 15 the two tensioning devices to loosen the two tensioning devices, and then operates the mechanical operating handles of the two tensioning devices until the two tensioning devices are in a loosened and demountable state;
Step 11, the operator working aloft equipotentially demounts the two tensioning devices, the front clamp and the rear clamp in sequence, and transfers 20 them to the ground via the insulating transfer rope.
The operators working aloft and working leaders should have a qualification certificate for live working operations; the distance between them and electrified bodies and grounding objects during working should meet related requirements of Safety code of electric power industry-Part of electric lines, and operators 25 working aloft should wear complete sets of qualified shielding clothes (caps, clothes, socks and conductive shoes) and use qualified insulating ropes.
The carbon fiber general closed type clamp for replacing UHV insulators and the use method thereof provided in the above embodiments improve the capacity of servicing for large-tonnage insulators by institutions/companies for operation 30 and maintenance of the UHV transmission lines. It ensure that the working load of the closed type clamp meets safety requirements of regulations; furthermore, the front clamp and rear clamp in small size are formed, which ensures that the
2019203268 09 May 2019 insulator string can be installed successfully on site with limited space structure size. Furthermore, the weight of the single front clamp or rear clamp is significantly reduced, on-site carrying and installation and demounting at heights are facilitated, the practicality of the closed type clamp is ensured, and safety of 5 on-site working aloft is improved.
The carbon fiber general closed type clamp for replacing UHV insulators and the use method thereof provided in the above embodiments solve the stroke problem of the tensioning devices via the hydraulic and mechanical combined lead screws, and reduces the length of the hydraulic lead screw, thereby reducing 10 the whole weight and improving safety and practicality of installation of the whole set of clamp means at heights. On the other hand, the function distribution of pre-tightening via the mechanical lead screw and large-tonnage tension tightening via the hydraulic lead screw ensures safety, reliability and operation convenience during tightening or releasing.
The carbon fiber general closed type clamp for replacing UHV insulators and the use method thereof provided in the above embodiments improve the efficiency and safety of servicing operation; the closed type clamp means facilitates on-site carrying, hoisting and storage in warehouses, thereby effectively reducing the labor intensity of operators working aloft and improving the working efficiency;
the closed type clamp is convenient to operate and popularize for use. By using the closed type clamp, insulator replacement is fast and stable, so strength is saved and safety is improved. The length of the whole device may be adjusted so the closed type clamp may be applied to replacement of insulators with different lengths.
Except otherwise stated, the value scope disclosed by any of the technical solutions of this invention is a preferred value scope. Any of those skilled in the field should understand that the preferred value scope only involves values of many practical values with obvious technical effect or representative ones. With non-exhaustible values, the invention discloses 30 partial values to illustrate the technical solutions of the invention.
Furthermore, the illustrated values do not constrain the protection scope of the invention.
If “first” and “second” are used to define the parts, those skilled in the
2019203268 09 May 2019 field should know that “first” and “second” are only used to describe and distinguish the parts, and have no special meanings unless otherwise specified.
At the same time, if the invention publically involves fixedly connected parts or structural members, unless otherwise specified, the fixed connection 5 can be understood as detachable fixed connection (such as with bolts or screws) or non-detachable fixed connection (such as riveting and welding); of course the fixed connection can be replaced (unless the integrated forming process is unavailable obviously) by an integrated structure (such as produced via the casting process through integrated forming).
Furthermore, unless otherwise specified, all terms used in any technical solution disclosed by the invention to indicate the position relations or shapes refer to approximate, similar or like shapes. Any part provided by the invention can be an assembly part formed by many independent components or an independent part produced by the integrated forming process.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the invention instead of posing limit on them. Although the invention is explained in detail by referring to the optimal embodiment, those skilled in the field should understand that the detailed description of the invention can be modified or some technical characteristics 20 can be subjected to equivalent replacement; as long as the performance does not break away from the spirit of the technical solution, the modifications or replacement should be included in the scope of the technical solutions of the invention requested to be protected.
Throughout the specification and the claims that follow, unless the context requires otherwise, the words “comprise” and “include” and variations such as “comprising” and “including” will be understood to imply the inclusion of a stated integer or group of integers, but not the exclusion of any other integer or group of integers.
The reference to any prior art in this specification is not, and should not be taken as, an acknowledgement of any form of suggestion that such prior art forms part of the common general knowledge.
It will be appreciated by those skilled in the art that the invention is not
2019203268 09 May 2019 restricted in its use to the particular application described. Neither is the present invention restricted in its preferred embodiment with regard to the particular elements and/or features described or depicted herein. It will be appreciated that the invention is not limited to the embodiment or 5 embodiments disclosed, but is capable of numerous rearrangements, modifications and substitutions without departing from the scope of the invention as set forth and defined by the following claims.
Claims (8)
- Claims1. A clamp means for replacing UHV insulators, comprising:a front clamp, a rear clamp and a tensioning device, wherein the tensioning5 device is arranged between the front clamp and the rear clamp, one end of the tensioning device is connected with the front clamp and the other end of the tensioning device is connected with the rear clamp and the tensioning device is used for adjusting a distance between the front clamp and the rear clamp during replacement of the insulators and can exert a tensioning force on the front clamp io and the rear clamp; a first bushing is arranged in the front clamp, a second bushing is arranged in the rear clamp;wherein the front clamp comprises a first upper cover and a first base; one end of the first upper cover is in rotatable connection with one end of the first base, and the other end of the first upper cover is in movable connection with the 15 other end of the first base; and the first bushing comprises a semi-annular first left bushing and a semiannular first right bushing; a first upper semi-circular through slot is arranged on the lower end surface of the first upper cover, and a first lower semi-circular through slot is arranged on the first base; the first left bushing and the first right 20 bushing are respectively arranged in and are in interference fit with the first upper semi-circular through slot and the first lower semi-circular through slot; and wherein the rear clamp comprises a second upper cover and a second base, wherein one end of the second upper cover is in rotatable connection with one end of the second base, and the other end of the second upper cover is in movable 25 connection with the other end of the second base;the second bushing comprises a semi-annular second left bushing and a semiannular second right bushing; a second upper semi-circular through slot is arranged on the lower end surface of the second upper cover, and a second lower semi-circular through slot is arranged on the second base; the second left bushing 30 and the second right bushing are respectively arranged in and are in interference fit with the second upper semi-circular through slot and the second lower semicircular through slot.
- 2. The clamp means according to claim 1, wherein a first magnet is embedded in2019203268 09 May 2019 the first bushing and a second magnet is embedded in the second bushing.
- 3. The clamp means according to claim 2, wherein a first groove is formed in an inner wall of the first bushing and a second groove is formed in an inner wall of the second bushing both in the circumferential direction at an equal spacing, and5 the first magnet is arranged in the first groove and the second magnet is arrange in the second groove.
- 4. The clamp means according to claim 1, wherein each of the front clamp and the rear clamp comprises a bolt, a pin shaft and an elastic collar;wherein one end of the first upper cover is hinged to one end of the first base io through the pin shaft, and the other end of the first upper cover is connected with the other end of the first base through the bolt and the elastic collar; and one end of the second upper cover is hinged to one end of the second base through the pin shaft, and the other end of the second upper cover is connected with the other end of the second base through the bolt and the elastic collar.15 5. The clamp means according to claim 4, wherein the bolts and pin shafts are made of a high-strength steel;the first upper cover, the first base, the second upper cover and the second base are made of carbon fiber composites; and the first left bushing, the first right bushing, the second left bushing and the 20 second right bushing are made of a titanium alloy.6. The clamp means according to claim 1, wherein the tensioning device comprises a mechanical lead screw and a hydraulic transmission mechanism; one end of the mechanical lead screw is in threaded connection with one end of the hydraulic transmission mechanism, the other end 25 of the mechanical lead screw is in bolted connection with the front clamp, and the other end of the hydraulic transmission mechanism is connected with the rear clamp; the hydraulic transmission mechanism and the mechanical lead screw exert the tensioning force onto the front clamp and the rear clamp.7. The clamp means according to claim 1, wherein the clamp means further 30 comprises a second tensioning device, wherein the second tensioning device is arranged between the front clamp and the rear clamp, one end of the tensioning2019203268 09 May 2019 device is connected with the front clamp and the other end of the tensioning device is connected with the rear clamp, respectively, wherein the tensioning devices are used for adjusting a distance between the front clamp and the rear clamp during replacement of the insulators and can exert a tensioning force on the 5 front clamp and the rear clamp wherein the two tensioning devices are in bolted connection with left ends and right ends of the front clamp and the rear clamp respectively8. The clamp means according to claim 6, wherein the mechanical lead screw comprises a first lead screw, a second lead screw and a regulation tube, wherein10 the thread directions of the first lead screw and the second lead screw are reverse; the upper end of the first lead screw is fixedly connected with the front clamp, and the lower end of the second lead screw is fixedly connected with the hydraulic transmission mechanism; two ends of the regulation tube sleeve at the lower end of the first lead screw and the upper end of the second lead screw, respectively,15 and threads spirally engaged with the first lead screw and the second lead screw are arranged on an inner wall of a first regulation tube.9. The clamp means according to claim 8, wherein a rotating tube sleeves on an outer wall of the regulation tube, and a mechanical operating handle is arranged on the rotating tube.20 10. The clamp means according to claim 9, wherein the hydraulic transmission mechanism is a hydraulic oil cylinder; and the lower end of the second lead screw is in threaded connection with a tail portion of a cylinder body of the hydraulic oil cylinder, and a telescopic rod of the hydraulic oil cylinder is fixedly connected with the rear clamp.25 11. The clamp means according to claim 10, wherein the hydraulic oil cylinder further comprises a spring and a piston; the cylinder body is divided into an upper hydraulic chamber and a lower hydraulic chamber via the piston; the spring is located in the upper hydraulic chamber, with its length direction consistent with that of the upper hydraulic chamber; the upper end of the telescopic rod is30 connected with the piston, and the lower end of the telescopic rod penetrates through a wall at the bottom of the lower hydraulic chamber and is fixedly connected with the rear clamp.12. The clamp means according to claim 11, wherein a seal ring is provided at a2019203268 09 May 2019 mounting hole for the telescopic rod at the wall at the bottom of the lower hydraulic chamber.13. The clamp means according to claim 12, wherein the hydraulic oil cylinder comprises a hydraulic operating handle and a first hydraulic oil chamber, wherein
- 5 the hydraulic operating handle is installed on the cylinder body and hydraulic oil in the first hydraulic oil chamber is pressed into a lower hydraulic chamber by the hydraulic operating handle.14. The clamp means according to claim 13, wherein the hydraulic oil cylinder comprises an unloading one-way valve, wherein the unloading one-way valve is
- 10 connected with the first hydraulic oil chamber and the lower hydraulic chamber;wherein when the unloading one-way valve is opened, pressurised oil in the first hydraulic oil chamber, under the effect of the hydraulic operating handle, flows into the lower hydraulic chamber through the unloading one-way valve to push the piston to move upwards and compress the spring, wherein the pressure of the 15 oil in the first hydraulic oil chamber is maintained by closing the unloading oneway valve; and when the unloading one-way valve is opened, under the effect of the spring, the pressurised oil in the lower hydraulic chamber flows into the first hydraulic oil chamber through the unloading one-way valve.
- 15. The clamp means according to claim 14, wherein the lower end of the 20 telescopic rod penetrates through the wall at the bottom of the lower hydraulic chamber and is connected with the rear clamp through a bolt; and the rear clamp is formed therein with a bolt hole in which a titanium alloy bolt hole bushing is arranged; and the front clamp is provided therein with a bolt hole to be engaged with a bolt and a titanium alloy bolt hole bushing is arranged in the 25 bolt hole.
- 16. The clamp means according to claim 15, wherein the lower end of the second lead screw is in threaded connection with the tail portion of the cylinder body of the hydraulic oil cylinder; and the upper end of the first lead screw is connected with the front clamp through 30 a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2019203268A AU2019203268A1 (en) | 2016-08-11 | 2019-05-09 | General closed type clamp means for replacing uhv insulators |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610657626.9A CN106159796B (en) | 2016-08-11 | 2016-08-11 | A kind of general closed type fixture and its application method for being used to change extra-high voltage insulator |
| CNCN201610657626.9 | 2016-08-11 | ||
| AU2017201903A AU2017201903B2 (en) | 2016-08-11 | 2017-03-21 | General closed type clamp means for replacing uhv insulators and use method thereof |
| AU2019203268A AU2019203268A1 (en) | 2016-08-11 | 2019-05-09 | General closed type clamp means for replacing uhv insulators |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017201903A Division AU2017201903B2 (en) | 2016-08-11 | 2017-03-21 | General closed type clamp means for replacing uhv insulators and use method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019203268A1 true AU2019203268A1 (en) | 2019-05-30 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017201903A Active AU2017201903B2 (en) | 2016-08-11 | 2017-03-21 | General closed type clamp means for replacing uhv insulators and use method thereof |
| AU2019203268A Withdrawn AU2019203268A1 (en) | 2016-08-11 | 2019-05-09 | General closed type clamp means for replacing uhv insulators |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017201903A Active AU2017201903B2 (en) | 2016-08-11 | 2017-03-21 | General closed type clamp means for replacing uhv insulators and use method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106159796B (en) |
| AU (2) | AU2017201903B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171241B (en) * | 2017-03-29 | 2018-12-04 | 国网浙江省电力公司金华供电公司 | A kind of replacement extra high voltage line strain insulator complexes |
| CN107147035A (en) * | 2017-06-09 | 2017-09-08 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of transmission line of electricity self-destruction replacing insulator General clamping and its application method |
| CN107069559B (en) * | 2017-06-15 | 2019-02-05 | 如皋市同泰电力器材有限公司 | A kind of composite insulator metal universal fixture |
| CN108173165A (en) * | 2018-02-06 | 2018-06-15 | 江苏省送变电有限公司 | Carbon fiber monolithic insulator replacement fixture |
| CN110277745A (en) * | 2019-05-28 | 2019-09-24 | 金华送变电工程有限公司 | A kind of general replacement tool of self-destruction glass insulator |
| CN110364960A (en) * | 2019-07-16 | 2019-10-22 | 云南电网有限责任公司曲靖供电局 | Strain insulator list insulator string inspection platform |
| CN111697491A (en) * | 2020-05-27 | 2020-09-22 | 国网河北省电力有限公司邢台供电分公司 | Single insulator staple bolt of acting as go-between |
| CN112217134B (en) * | 2020-09-11 | 2023-07-11 | 国网浙江绍兴市上虞区供电有限公司 | Cleaning head adjusting and positioning structure of transmission line cleaning device |
| CN113363866A (en) * | 2021-06-16 | 2021-09-07 | 国网山西省电力公司检修分公司 | Chest expander for replacing insulator of extra-high voltage line |
| CN113733010B (en) * | 2021-09-15 | 2022-10-25 | 中国长江电力股份有限公司 | Replacement device and replacement method for built-in rubber gasket of welding type gas insulated line |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201122809Y (en) * | 2007-11-30 | 2008-09-24 | 甘肃省电力公司兰州超高压输变电公司 | Inner lining of barrel-type steel cap disk type electrical insulator clamp apparatus |
| CN201126942Y (en) * | 2007-12-18 | 2008-10-01 | 西北电网有限公司 | Chucking tools clamping apparatus for altering middle single-slice insulator for 750kV circuit with electrification |
| CN202050190U (en) * | 2011-03-24 | 2011-11-23 | 宁夏电力公司吴忠供电局 | Combined type insulator-replacing clamping tool |
| CN102290167B (en) * | 2011-06-24 | 2012-10-31 | 四川省电力公司西昌电业局 | Tension insulator string snow guard |
| CN203367880U (en) * | 2013-07-31 | 2013-12-25 | 国家电网公司 | 760kN disk-shaped insulator holder |
-
2016
- 2016-08-11 CN CN201610657626.9A patent/CN106159796B/en active Active
-
2017
- 2017-03-21 AU AU2017201903A patent/AU2017201903B2/en active Active
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2019
- 2019-05-09 AU AU2019203268A patent/AU2019203268A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| CN106159796A (en) | 2016-11-23 |
| AU2017201903B2 (en) | 2019-05-23 |
| AU2017201903A1 (en) | 2018-03-01 |
| CN106159796B (en) | 2018-02-09 |
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