CN108521100B - Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain - Google Patents
Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain Download PDFInfo
- Publication number
- CN108521100B CN108521100B CN201810635934.0A CN201810635934A CN108521100B CN 108521100 B CN108521100 B CN 108521100B CN 201810635934 A CN201810635934 A CN 201810635934A CN 108521100 B CN108521100 B CN 108521100B
- Authority
- CN
- China
- Prior art keywords
- plate
- clamp
- clamp plate
- fixture
- hanging point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012212 insulator Substances 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 title claims abstract description 12
- 206010015856 Extrasystoles Diseases 0.000 title claims description 3
- 230000007246 mechanism Effects 0.000 claims description 11
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 description 12
- 239000011111 cardboard Substances 0.000 description 10
- 230000008602 contraction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
Abstract
The invention belongs to the technical field of power equipment, and particularly relates to a special fixture for a triple V-shaped insulator string of a +/-1100 kV direct-current transmission line. The groove bottom of the second clamping groove is designed into an inclined structure matched with the groove bottom, so that the groove bottom and the groove bottom are perfectly fit, the stability is ensured, and the mechanical strength is high, the size is small, and the assembly and disassembly are easy.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a special fixture for a triple V-shaped insulator string of a +/-1100 kV direct-current transmission line.
Background
The insulator string refers to an assembly of two or more insulator elements combined together to flexibly suspend a wire. The insulator string is provided with a protection device required for fixing and running, and is used for suspending a lead and insulating the lead from a tower and the ground. The insulator string used in the transmission line has different assembly types due to different tower structures, insulator structure types, sizes of the wires, the number of sub-wires of each phase and voltage grades. Among them, the V-shaped insulator string is a common one, and has the following advantages: (1) the insulator string can be limited from swinging, so that the size of the tower head is reduced; (2) the line corridor can be reduced, so that the cutting width of trees in the forest area is reduced; (3) the capital spent for purchasing the corridor during line building can be reduced, and therefore the purpose of saving investment is achieved.
The patent document with the publication number of CN103871693B discloses a 550KN triple V-shaped suspension insulator string for an extra-high voltage transmission line, which comprises suspension point hardware fittings, suspension insulators, equalizing rings, shielding rings and pre-twisted wire type ship-shaped suspension wire clamps, wherein 3 suspension insulators on one side are provided, one end of each suspension insulator is connected with a ball head suspension ring, the other end of each ball head suspension ring is connected to a DB adjusting plate, the DB adjusting plate is connected to the lower end of a variable triple plate, and the upper end of the variable triple plate is sequentially connected with a first right-angle suspension plate, the DB adjusting plate, another first right-angle suspension plate and the suspension point hardware fittings; the other end of each suspension insulator is respectively connected to two three-variable connection plates which are fixedly connected into a whole through a socket hanging plate, the two three-variable connection plates are connected to two sides of the first connection plate through two first parallel hanging plates, the lower end of the first connection plate is connected to the second connection plate through a second parallel hanging plate, and two sides of the second connection plate are respectively connected with a third right-angle hanging plate; in the process of maintaining and replacing the similar triple V-shaped insulator string, the workload is large, and the replacement time is long.
Patent document No. CN205265143U discloses a fixture for replacing a V-shaped insulator string of a high-voltage transmission line in a live state, which comprises a front fixture, a rear fixture and two groups of contraction assemblies, wherein two ends of the two groups of contraction assemblies are respectively hinged to two ends of the front fixture and the rear fixture; the contraction assembly comprises a manual screw rod and an insulating pull rod which are sequentially connected; the front card body is of a bilaterally symmetrical cross-shaped integral structure with side wings, an open slot is formed in the middle of the front card body, the open slot penetrates through the front and the back of the front card body, the upper end of the open slot is closed, and the lower end of the open slot is open; the two side wings of the front card are provided with first hinge holes; the rear card body is of a split structure and consists of a left half card and a right half card which are completely the same in shape and structure; the left half card and the right half card are L-shaped, bolt holes are formed in the fixing parts of the two half cards and are connected with the two half cards through bolts, and second hinge holes are formed in the tops of the two half cards; the manual lead screw is hinged with the front clamp through the first hinge hole, and the insulating pull rod is hinged with the rear clamp through the second hinge hole. The structure has the following disadvantages: the front card and the rear card cannot comprehensively fit the V-shaped insulator, and the problem of unstable combination exists.
Disclosure of Invention
In view of the above, the invention aims to provide a clamp special for a triple V-shaped insulator string of a +/-1100 kV direct-current transmission line, and the clamp is designed to design the groove bottom of the second clamping groove into an inclined structure matched with the wire-side connecting plate, so that the perfect fit between the groove bottom and the inclined structure is realized, the stability is ensured, and the clamp is high in mechanical strength, small in size and easy to assemble and disassemble.
In order to achieve the purpose, the invention adopts the following technical scheme:
the fixture special for the +/-1100 kV direct-current transmission line triple V-shaped insulator string comprises a first fixture fixed on a cross arm side connecting plate and a second fixture fixed on a wire side connecting plate, wherein the first fixture comprises a first clamping plate and a second clamping plate which are symmetrically arranged, the first clamping plate and the second clamping plate are respectively provided with a first clamping groove and a first hanging point, the first hanging points are rotatably connected to the notch positions of the first clamping grooves through pin shafts, the second fixture comprises a third clamping plate and a fourth clamping plate which are symmetrically arranged, the third clamping plate and the fourth clamping plate are respectively provided with a second clamping groove and a second hanging point, the groove bottom of the second clamping groove is of an inclined structure matched with the wire side connecting plate, the second hanging point is rotatably connected to the notch positions of the second clamping grooves through pin shafts, and a length adjusting mechanism is arranged between the first hanging point and the second hanging point.
Further, length adjustment mechanism includes connector, connecting rod, accommodate the lead screw and internal thread lead screw according to the preface, the connector links with first string of point pin joint, the connector rotates with the connecting rod to be connected, connecting rod and accommodate the lead screw fixed connection, accommodate the lead screw and internal thread lead screw thread fit, the internal thread lead screw links with the second pin joint of hanging the point.
Furthermore, two length adjusting mechanisms are arranged between each group of the first hanging points and the second hanging points.
Furthermore, the first fixture and the second fixture are made of titanium alloy materials, and the connecting rod is an insulating rod.
Furthermore, the first clamping apparatus is splayed, and the parts of the first clamping plate and the second clamping plate close to the first hanging point are of arc-shaped or inclined structures.
Furthermore, the third clamping plate and the fourth clamping plate are provided with positioning screw holes, and the positioning screw holes are connected with jackscrews in a threaded mode.
Furthermore, a rubber anti-slip pad is arranged at the bottom of the second clamping groove, and anti-slip lines or anti-slip protrusions are arranged on the end face of the rubber anti-slip pad.
The invention has the beneficial effects that:
1. the first clamp comprises a first clamp plate and a second clamp plate which are symmetrically arranged, the second clamp comprises a third clamp plate and a fourth clamp plate which are symmetrically arranged, a first clamping groove and a first hanging point are respectively arranged on the first clamp plate and the second clamp plate, a second clamping groove and a second hanging point are respectively arranged on the third clamp plate and the fourth clamp plate, the first clamping groove is used for being mutually clamped with a cross arm side connecting plate of an insulator string, the second clamping groove is used for being mutually clamped with a conductive side connecting plate of the insulator string, and the conductive side connecting plate is of a herringbone structure;
when the device is used, the first clamping plate and the second clamping plate are clamped on the cross arm side connecting plate, the first hanging point is arranged on the first clamping plate and the second clamping plate through the positioning pins, then the third clamping plate and the fourth clamping plate are clamped on the wire side connecting plate, the jackscrews are screwed, the second hanging point is arranged on the third clamping plate and the fourth clamping plate through the positioning pins, and finally, the length adjusting mechanism is arranged between the first hanging point and the second hanging point, the length adjusting mechanism is tightened, the load of the insulator string is transferred to the clamping device, and the insulator string is loosened; picking up a spring pin on the insulator and replacing the insulator; and after the replacement is finished, the length adjusting mechanism is loosened, so that the load is transferred to the insulator string, and the clamp is removed. The fixture disclosed by the invention is perfectly fit with the connecting plates at two ends of the insulator string, so that the stability is ensured, and the fixture is high in mechanical strength, small in size and easy to assemble and disassemble;
through tests, the rated working load of the three-way V-shaped insulator chain replacement device reaches 425kN, the dynamic test load is 637.5kN, the safety factor is 2.5 times, and the safety operation of replacing the three-way V-shaped insulator chain in a charged manner on the tangent tower of the +/-1100 kilovolt high-voltage direct-current transmission line is realized.
2. The first fixture and the second fixture are made of titanium alloy materials, the size of the tool is reduced, the mechanical strength of the tool is improved, the weight of the tool is reduced, the operation risk is reduced, the working safety is improved, and the insulating property of the tool is improved because the connecting rod is an insulating rod.
3. First fixture is the splayed, and the part that first cardboard and second cardboard are close to first string of point is arc or slope column structure, and this structural design can effectively increase two effective widths between the first string of point, and the practicality is stronger.
4. The tank bottom of second draw-in groove sets up the rubber slipmat, and the terminal surface of rubber slipmat sets up anti-skidding line or non-skid stud, and this structural design can effectively improve the frictional force between third cardboard and fourth cardboard and the wire side link board.
Drawings
FIG. 1 is a schematic structural diagram illustrating a use state of the embodiment;
FIG. 2 is a schematic structural diagram of a first card and a second card according to an embodiment;
FIG. 3 is a schematic structural diagram illustrating a third card board and a fourth card board according to an embodiment in use;
FIG. 4 is a schematic cross-sectional view of the fourth clamping plate shown in FIG. 3;
FIG. 5 is a schematic cross-sectional view illustrating a fourth card according to an embodiment.
Reference numbers in the figures: 1-cross arm side connecting plate, 2-lead side connecting plate, 3-first clamping plate, 4-second clamping plate, 5-first clamping groove, 6-first hanging point, 7-third clamping plate, 8-fourth clamping plate, 9-second clamping groove, 10-second hanging point, 11-positioning screw hole, 12-jackscrew, 13-connector, 14-connecting rod, 15-adjusting screw rod, 16-internal thread screw rod and 17-rubber anti-skid pad.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 to 4, the present invention includes a first fixture fixed to a cross arm side connecting plate 1 and a second fixture fixed to a wire side connecting plate 2, the first fixture includes a first clamping plate 3 and a second clamping plate 4 symmetrically arranged, the first clamping plate 3 and the second clamping plate 4 are both provided with a first clamping groove 5 and a first hanging point 6, the first fixture is splayed, and specifically includes: the parts, close to a first hanging point 6, of the first clamping plate 3 and the second clamping plate 4 are of inclined structures, the first hanging point 6 is rotatably connected to the notch position of the first clamping groove 5 through a pin shaft, the second clamping plate comprises a third clamping plate 7 and a fourth clamping plate 8u which are symmetrically arranged, the third clamping plate 7 and the fourth clamping plate 8 are both provided with a second clamping groove 9 and a second hanging point 10, the groove bottom of the second clamping groove 9 is of an inclined structure matched with the wire side connecting plate 1, the second hanging point 10 is rotatably connected to the notch position of the second clamping groove 9 through a pin shaft, the first hanging point 6 and the second hanging point 10 are of triangular structures, the third clamping plate 7 and the fourth clamping plate 8 are provided with positioning screw holes 11, the positioning screw holes 11 are connected with jackscrews 12 in a threaded manner, and two length adjusting mechanisms are arranged between each group of the first hanging point 6 and the second hanging point 10;
the length adjusting mechanism sequentially comprises a connector 13, a connecting rod 14, an adjusting screw rod 15 and an internal thread screw rod 16, one end of the connector 13 is in pin joint with the first hanging point 6, the other end of the connector 13 is rotatably connected with the connecting rod 14, the connecting rod 14 is fixedly connected with the adjusting screw rod 15, the adjusting screw rod 15 is in threaded fit with the internal thread screw rod 16, and the internal thread screw rod 16 is in pin joint with the second hanging point 10.
Example two
The structure of this embodiment is basically the same as that of the first embodiment, except that: as shown in fig. 5, a rubber anti-slip pad 17 is disposed at the bottom of the second slot 9, an anti-slip protrusion (not shown) is disposed on an end surface of the rubber anti-slip pad 17, and the rubber anti-slip pad 17 can be fixed in the second slot 9 by gluing or clamping.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (2)
1. Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain, including fixing at the first fixture of cross arm side even board and fixing at the second fixture of wire side even board, its characterized in that: the first clamp comprises a first clamp plate and a second clamp plate which are symmetrically arranged, a first clamping groove and a first hanging point are respectively arranged on the first clamp plate and the second clamp plate, the first hanging point is rotationally connected to the notch position of the first clamping groove through a pin shaft, the second clamp comprises a third clamp plate and a fourth clamp plate which are symmetrically arranged, a second clamping groove and a second hanging point are respectively arranged on the third clamp plate and the fourth clamp plate, the groove bottom of the second clamping groove is of an inclined structure matched with the wire side connecting plate, the second hanging point is rotationally connected to the notch position of the second clamping groove through a pin shaft, a length adjusting mechanism is arranged between the first hanging point and the second hanging point, the first clamp is splayed, the parts of the first clamp plate and the second clamp plate close to the first hanging point are of arc-shaped or inclined structures, the length adjusting mechanism sequentially comprises a connecting head, a connecting rod, an adjusting screw rod and an internal thread screw rod, the connecting head is in pin joint with the first hanging points and is rotationally connected with the connecting rod, the connecting rod is fixedly connected with an adjusting screw rod, the adjusting screw rod is in threaded fit with the internal thread screw rod, the internal thread screw rod is in pin joint with the second hanging points, two length adjusting mechanisms are arranged between each group of first hanging points and second hanging points, positioning screw holes are formed in the third clamping plate and the fourth clamping plate, and jackscrews are in threaded connection with the positioning screw holes; the bottom of the second clamping groove is provided with a rubber anti-slip pad, and the end face of the rubber anti-slip pad is provided with anti-slip lines or anti-slip bulges.
2. The clamp special for the triple V-shaped insulator string of the +/-1100 kV direct-current transmission line according to claim 1, wherein the clamp comprises: the first fixture and the second fixture are made of titanium alloy materials, and the connecting rod is an insulating rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635934.0A CN108521100B (en) | 2018-06-20 | 2018-06-20 | Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810635934.0A CN108521100B (en) | 2018-06-20 | 2018-06-20 | Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108521100A CN108521100A (en) | 2018-09-11 |
| CN108521100B true CN108521100B (en) | 2021-05-04 |
Family
ID=63428424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810635934.0A Active CN108521100B (en) | 2018-06-20 | 2018-06-20 | Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108521100B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114123027B (en) * | 2021-11-24 | 2024-03-01 | 国网江苏省电力有限公司检修分公司 | Steel pipe tower straight line double-I-string clamp and operation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012095373A (en) * | 2010-10-22 | 2012-05-17 | Chugoku Electric Power Co Inc:The | Insulator maintenance inspection mounting fixture |
| CN103825217A (en) * | 2014-03-04 | 2014-05-28 | 国家电网公司 | Anti-tension triple-connected middle string clamp for 1,000kV ultrahigh-voltage power transmission line |
| CN203800477U (en) * | 2014-03-31 | 2014-08-27 | 贵阳供电局 | Clamping tool used for electriferous replacement of first insulator of power transmission line tension single chain at wire side |
| CN206117007U (en) * | 2016-10-27 | 2017-04-19 | 国家电网公司 | Connecting device is changed to insulator |
| CN208461331U (en) * | 2018-06-20 | 2019-02-01 | 国网河南省电力公司检修公司 | Three V-type insulator chain special mould clamp of ± 1100kV DC power transmission line |
-
2018
- 2018-06-20 CN CN201810635934.0A patent/CN108521100B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012095373A (en) * | 2010-10-22 | 2012-05-17 | Chugoku Electric Power Co Inc:The | Insulator maintenance inspection mounting fixture |
| CN103825217A (en) * | 2014-03-04 | 2014-05-28 | 国家电网公司 | Anti-tension triple-connected middle string clamp for 1,000kV ultrahigh-voltage power transmission line |
| CN203800477U (en) * | 2014-03-31 | 2014-08-27 | 贵阳供电局 | Clamping tool used for electriferous replacement of first insulator of power transmission line tension single chain at wire side |
| CN206117007U (en) * | 2016-10-27 | 2017-04-19 | 国家电网公司 | Connecting device is changed to insulator |
| CN208461331U (en) * | 2018-06-20 | 2019-02-01 | 国网河南省电力公司检修公司 | Three V-type insulator chain special mould clamp of ± 1100kV DC power transmission line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108521100A (en) | 2018-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108521100B (en) | Special fixture of 1100kV direct current transmission line trigeminy V type insulator chain | |
| WO2012088986A1 (en) | Maintenance tool used for direct current transmission line | |
| CN205070303U (en) | 750kV circuit block of four strain insulator string tip fixture | |
| CN208461331U (en) | Three V-type insulator chain special mould clamp of ± 1100kV DC power transmission line | |
| CN208337014U (en) | A kind of charged for replacement Voltage for Insulators on HV Lines lifting block hanging point heightening device | |
| CN106033872A (en) | Tool for equipotential replacement of single-joint double-flexible bus tension insulator | |
| CN208127758U (en) | A kind of overhead transmission line two strings of strain insulators replacement tool | |
| CN206211407U (en) | The fixture of charged for replacement double bundle conductor strain list insulator string | |
| CN114123030B (en) | Tool and method for replacing triple strain insulator string | |
| CN203135324U (en) | Frapping tool used for power transmission line maintenance | |
| CN101694792A (en) | Duplex-joint V-shaped suspended insulator chain for ultrahigh voltage transmission line | |
| CN208337022U (en) | A kind of replacing insulator fixture | |
| CN103606849A (en) | Multi-bundled live conductor lifting device for transmission tower and special fixture of multi-bundled live conductor lifting device | |
| CN210201444U (en) | Circuit breaking structure | |
| CN209015792U (en) | A kind of Novel post insulator | |
| CN204947467U (en) | Vertical two elevator | |
| CN105610050A (en) | Continuous adjustable universal lightning protection apparatus equipped with parallel gaps | |
| CN114123028B (en) | Method for replacing triple strain insulator string | |
| CN206004211U (en) | Charged for replacement 35 110kV compresses shaped cable clamp strain insulator list insulator string fixture | |
| CN220914924U (en) | Power cable fixing device | |
| CN103219670B (en) | A kind of tune strain insulator-string automatic aligning fixture | |
| CN214541772U (en) | Lightning arrester | |
| CN216251432U (en) | Grounding piece capable of deforming | |
| CN210956301U (en) | Insulator string suspension device for salt density test | |
| CN208046097U (en) | A kind of parallel four yoke plates special mould clamp in DC line tension tower conducting wire end |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |