CN113809680A - Extra-high voltage strain tower end porcelain insulator replacement auxiliary device and using method thereof - Google Patents
Extra-high voltage strain tower end porcelain insulator replacement auxiliary device and using method thereof Download PDFInfo
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- CN113809680A CN113809680A CN202111148455.4A CN202111148455A CN113809680A CN 113809680 A CN113809680 A CN 113809680A CN 202111148455 A CN202111148455 A CN 202111148455A CN 113809680 A CN113809680 A CN 113809680A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
An auxiliary device for replacing an insulator at the end part of an extra-high voltage strain tower comprises an M-arc yoke plate and parallel hanging plates, wherein the M-arc yoke plate is provided with two M-arc yoke plates which are arranged in an up-down symmetrical mode, the M-arc yoke plate is provided with a plurality of bolt holes for connection, one end of each parallel hanging plate is fixed between the two M-arc yoke plates and is connected through a high-strength bolt, the other end of each parallel hanging plate extends out of the M-arc yoke plate, and the extending end of each parallel hanging plate is provided with a construction hole; the parallel hanging plate is provided with four parallel plates which are sequentially arranged at the end part of the inner arc of the M-arc connecting plate. The invention further comprises a using method of the auxiliary device for replacing the porcelain insulator at the end part of the ultra-high voltage strain tower. By utilizing the porcelain insulator special fixture and the auxiliary device, the porcelain insulator special fixture can be effectively connected with the auxiliary device, the porcelain insulator special fixture is convenient and fast to install and disassemble, the construction safety risk and the labor intensity are reduced, the investment of manpower and material resources is reduced, and the construction period is shortened.
Description
Technical Field
The invention belongs to the field of power transmission line construction, and particularly relates to an auxiliary device for replacing an end porcelain insulator of an extra-high voltage strain tower and a using method thereof.
Background
The ultra-high voltage direct current transmission line has the characteristics of high voltage grade, long transmission distance, high construction technical requirements and the like, in the engineering (Henan 2 standard section) of the high voltage direct current transmission line with +/-800 kilovolts from Shaanxi to Hubei, a strain tower uses 550kN suspension type porcelain bottle quadruple string double-hanging-point strain insulator strings, each string is 89 porcelain bottles, the length of the string is 25m, the dead weight of the strain insulator string is 127kN, a lead adopts 6 XJL 1/G2A-1250/100 type steel core aluminum stranded wires, and the operation tension of each phase of the lead is up to 468 kN.
Because of factors such as external environment, improper construction, cause the tip vase damage of having installed, influence transmission line's fortune dimension safety, it is very necessary to need to design a tip vase and change auxiliary device.
At present, a mature special fixture is replaced for a tension porcelain bottle, but because the position of the porcelain bottle at the end part of an extra-high voltage line is special and the stress is large, the porcelain bottle close to the end part of a lead wire does not have a reliable supporting point for the fixture, the special porcelain bottle fixture cannot be fixed, and in the actual process of the prior art, a method for replacing the porcelain bottle after tightening an entire-phase porcelain bottle string is mostly adopted by a lever block, and the prior art has the following defects:
the method has the advantages of high material and labor consumption and long replacement period; when the porcelain insulator at the end part is replaced, 6 sets of 12t hand-pulling hoists, 12 GJ-180 adjacent anchor ropes, phi 24 steel wire rope sleeves, 1 set of working platform, 1 winch, 300m grinding ropes, 5 tool pulleys and the like are needed; at least more than 8 overhead workers and 5 ground auxiliary workers; 6 sets of hand-operated hoists need to be stressed synchronously and evenly in the process of tightening the porcelain insulator string, a plurality of points need to be arranged on the whole string of porcelain insulators after the porcelain insulators are loosened and reliably fixed on the anchor rope, the porcelain insulators are prevented from falling, and according to the previous construction experience, 1.5 days is needed for the replacement of the single porcelain insulator at the end part.
The device has the advantages of multiple high-altitude personnel, high labor intensity, long stress time of tools and instruments and high safety risk; according to design drawing parameters, the operating tension of the single-phase lead is up to 468kN, the dead weight of the tension string is 127kN, the over-traction of the lead, the dead weight of the porcelain insulator string and the unbalanced stress of the tools and the instruments are considered comprehensively, and the stress of 6 sets of 12t hand-operated chain blocks is close to the rated load.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of the prior art and provides an auxiliary device for replacing a porcelain insulator at the end part of a tension tower of an extra-high voltage direct current line, which has the advantages of low construction safety risk and cost and short construction period, and a use method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an auxiliary device for replacing an insulator at the end part of an extra-high voltage strain tower comprises an M-arc yoke plate and parallel hanging plates, wherein the M-arc yoke plate is provided with two M-arc yoke plates which are arranged in an up-down symmetrical mode, the M-arc yoke plate is provided with a plurality of bolt holes for connection, one end of each parallel hanging plate is fixed between the two M-arc yoke plates and is connected through a high-strength bolt, the other end of each parallel hanging plate extends out of the M-arc yoke plate, and the extending end of each parallel hanging plate is provided with a construction hole; the parallel hanging plate is provided with four parallel plates which are sequentially arranged at the end part of the inner arc of the M-arc connecting plate.
Further, the M-arc-shaped connecting plates are arranged on the upper surface and the lower surface of the triangular connecting plate close to the end porcelain insulator and are connected through high-strength bolts.
Furthermore, the special porcelain insulator fixture is connected with the four parallel hanging plates through four high-strength bolts by using a gear lead screw.
Furthermore, the thickness of the M arc-shaped connecting plate and the thickness of the parallel hanging plate are both 20-25mm, and Q345 low-alloy high-strength steel is adopted.
A use method of an auxiliary device for replacing an insulator at the end part of an extra-high voltage strain tower comprises the following steps:
1) the early preparation work of changing the tip vase is arranged according to the triangle yoke plate actual conditions who is close to the tip vase, including demolising the shielding ring of equalizer ring and rectangle yoke plate on the triangle yoke plate.
2) The upper surface and the lower surface of the triangular connecting plate are respectively provided with an M-arc connecting plate which is connected by two M38 high-strength bolts.
3) Four M20 high-strength bolts are used at the top ends of the M-arc yoke plates to connect the M-arc yoke plates into a whole, so that the upper and lower M-arc yoke plates are stressed in a balanced manner.
4) Four parallel hanging plates are arranged between the upper M-arc-shaped connecting plate and the lower M-arc-shaped connecting plate and are connected by four M20 high-strength bolts to form supporting points of the special porcelain bottle fixture.
5) And a special fixture for the porcelain bottle is arranged at the position close to the 4 th porcelain bottle steel anchor at the end part, and two sets of special fixtures are needed for two strings of porcelain bottles in order to ensure the balanced stress of the auxiliary device.
6) The special fixture for the porcelain insulator is connected with the four parallel hanging plates by using a gear lead screw.
7) Two sides of the end porcelain bottle to be replaced are connected by a phi 24 steel wire rope sleeve to make a secondary safety, so that accidents are prevented.
8) 4 overhead personnel slowly tighten the gear screw to ensure that the stress of the two strings of porcelain bottles is balanced.
9) After the replaced porcelain bottle is loosened, 1 person holds the porcelain bottle and extracts the porcelain bottle pin, takes out the damaged porcelain bottle from the porcelain bottle string, and adopts a tool rope to fall to the ground to replace the porcelain bottle which is completely replaced.
10) Slowly loosening the gear lead screw, stressing the porcelain insulator string, and removing the special clamp, the auxiliary device and the secondary safety rope for the porcelain insulator.
By utilizing the porcelain insulator special fixture and the auxiliary device, the porcelain insulator special fixture can be effectively connected with the auxiliary device, the porcelain insulator special fixture is convenient and fast to install and disassemble, the construction safety risk and the labor intensity are reduced, the investment of manpower and material resources is reduced, and the construction period is shortened.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of an M-arc yoke plate according to the embodiment of FIG. 1;
FIG. 3 is a schematic view of the parallel hanging plate in the embodiment shown in FIG. 1;
FIG. 4 is a diagram illustrating the effect of the present invention;
fig. 5 is an enlarged view of a portion a in fig. 4.
In the figure: 1-M arc yoke plate, 2-parallel link plate, 3-gear lead screw, 4-special fixture of vase, 5-triangle yoke plate, 6-tip vase, 7-equalizer ring, 8-shielding ring.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to the attached drawings 1-5, the hanging plate comprises M arc-shaped connecting plates 1 and parallel hanging plates 2, the number of the M arc-shaped connecting plates 1 is two, the two M arc-shaped connecting plates 1 are of a vertically symmetrical arrangement structure, the M arc-shaped connecting plates 1 are provided with a plurality of bolt holes, and the two M arc-shaped connecting plates 1 which are vertically symmetrical are connected and fixed through four bolts.
One end of the parallel hanging plate 2 is fixed in the middle of the two M-arc-shaped connecting plates 1, the other end of the parallel hanging plate extends out of the M-arc-shaped connecting plates 1 through high-strength bolts, and the parallel hanging plate 2 is parallel to each other and is provided with four blocks which are sequentially arranged at the end parts of the inner arcs of the M-arc-shaped connecting plates 1. The extending end of the parallel hanging plate 2 is provided with a construction hole.
In the embodiment, the thickness of the M-arc yoke plate 1 and the thickness of the parallel hanging plate 2 are both 20-25mm, and Q345 low-alloy high-strength steel is adopted.
The use method of the auxiliary device for replacing the porcelain insulator at the end part of the extra-high voltage strain tower in the embodiment is as follows:
in fig. 4, M-arc type yoke plates 1 are respectively mounted on the upper and lower surfaces of a triangular yoke plate 5 adjacent to an end portion porcelain bottle, and are connected by two M38 high-strength bolts. Four parallel hanging plates 2 are arranged between the upper M-arc yoke plate 1 and the lower M-arc yoke plate 1 and are connected by four M20 high-strength bolts to form supporting points of the special porcelain bottle fixture 4. And a special porcelain bottle fixture 4 is arranged at the position close to the 4 th porcelain bottle steel anchor at the end part, and two sets of special fixtures 4 are needed for two strings of porcelain bottles in order to ensure the balanced stress of the auxiliary device. The special porcelain insulator fixture 4 is connected with the four parallel hanging plates 2 through four M20 high-strength bolts by using the gear lead screw 3.
The early preparation work for replacing the end porcelain insulator 6 is arranged, and if the M-arc yoke plate 1 is installed, the equalizing ring 7 and the shielding ring 8 need to be detached.
4 overhead personnel slowly tighten the gear screw rod 3 to ensure that the stress of the two strings of porcelain bottles is balanced.
By changing the lax back of vase, 1 people hold up the vase and extract the vase pin, with the 6 serial takeouts of damaged tip vase from the vase, adopt the instrument rope to fall to ground, insert the vase draw-in groove with new vase during the change, install the vase pin.
Slowly loosening the gear screw 3, stressing the porcelain insulator string, and removing the special porcelain insulator clamp 4, the auxiliary device and the second safety rope.
The invention provides an auxiliary device for replacing a porcelain insulator at the end part of a tension tower of an extra-high voltage direct current line and a using method thereof, which can effectively realize the connection of a special porcelain insulator fixture 4 and the auxiliary device, are convenient to install and disassemble, reduce the construction safety risk and labor intensity, reduce the investment of manpower and material resources and shorten the construction period.
Various modifications and variations of the present invention may be made by those skilled in the art, and they are also within the scope of the present invention provided they are within the scope of the claims of the present invention and their equivalents.
What is not described in detail in the specification is prior art that is well known to those skilled in the art.
Claims (6)
1. An auxiliary device for replacing an insulator at the end part of an extra-high voltage strain tower is characterized by comprising an M-arc yoke plate and parallel hanging plates, wherein the M-arc yoke plate is provided with two M-arc yoke plates which are arranged vertically and symmetrically, the M-arc yoke plate is provided with a plurality of bolt holes for connection, one end of each parallel hanging plate is fixed between the two M-arc yoke plates and is connected through a high-strength bolt, the other end of each parallel hanging plate extends out of the M-arc yoke plate, and the extending end of each parallel hanging plate is provided with a construction hole; the parallel hanging plate is provided with four parallel plates which are sequentially arranged at the end part of the inner arc of the M-arc connecting plate.
2. The auxiliary device for replacing the porcelain insulator at the end part of the extra-high voltage tension tower is characterized in that the M-arc-shaped yoke plates are arranged on the upper surface and the lower surface of the triangular yoke plate adjacent to the porcelain insulator at the end part and are connected by high-strength bolts.
3. The auxiliary device for replacing the porcelain insulator at the end part of the extra-high voltage tension tower according to claim 2, wherein the special fixture for the porcelain insulator is connected with the four parallel hanging plates through four high-strength bolts by using a gear lead screw.
4. The auxiliary device for replacing the porcelain insulator at the end part of the extra-high voltage tension tower according to any one of claims 1 to 3, wherein the thickness of each of the M-arc-shaped connecting plate and the parallel hanging plate is 20-25mm, and Q345 low-alloy high-strength steel is adopted.
5. The porcelain bottle using method based on the extra-high voltage strain tower end porcelain bottle replacing auxiliary device of any one of claims 1 to 4 is characterized by comprising the following steps:
s1, arranging early-stage preparation work for replacing the porcelain insulator at the end part according to the actual situation of the triangular yoke plate close to the porcelain insulator at the end part, wherein the early-stage preparation work comprises the steps of removing a grading ring on the triangular yoke plate and a shielding ring of the rectangular yoke plate;
s2, respectively installing M-arc-shaped connecting plates on the upper surface and the lower surface of the triangular connecting plate and connecting the M-arc-shaped connecting plates by two high-strength bolts;
s3, connecting the top ends of the M-arc yoke plates into a whole by using four high-strength bolts, so that the upper and lower M-arc yoke plates are stressed in a balanced manner;
s4, mounting four parallel hanging plates between the upper M-arc-shaped connecting plate and the lower M-arc-shaped connecting plate, and connecting the four parallel hanging plates by using four high-strength bolts to form a supporting point of the special porcelain bottle clamp;
s5, mounting porcelain bottle special clamps at the 4 th porcelain bottle steel anchor near the end part, wherein two sets of special clamps are needed for two strings of porcelain bottles to ensure the stress balance of the auxiliary device;
s6, connecting the special porcelain insulator clamp with the four parallel hanging plates by using a gear lead screw;
s7, connecting two sides of the porcelain bottle at the end part to be replaced by a phi 24 steel wire rope sleeve to make a second safety, so as to prevent accidents;
s8, slowly tightening the gear lead screw by 4 high-altitude workers to ensure that the stress of the two strings of porcelain bottles is balanced;
s9, after the replaced porcelain bottle is loosened, 1 person holds the porcelain bottle and pulls out the pin of the porcelain bottle, takes out the damaged porcelain bottle from the porcelain bottle string, falls to the ground by adopting a tool rope, and replaces the porcelain bottle which is completely replaced;
and S10, slowly loosening the porcelain bottle clamp, stressing the porcelain bottle string, and removing the porcelain bottle special clamp, the auxiliary device and the second safety rope.
6. The method for using the porcelain insulator of the extra-high voltage tension tower end porcelain insulator replacement auxiliary device according to claim 5, wherein in step S9, a new porcelain insulator is inserted along the porcelain insulator clamping groove during replacement, and the porcelain insulator pin is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148455.4A CN113809680A (en) | 2021-09-26 | 2021-09-26 | Extra-high voltage strain tower end porcelain insulator replacement auxiliary device and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111148455.4A CN113809680A (en) | 2021-09-26 | 2021-09-26 | Extra-high voltage strain tower end porcelain insulator replacement auxiliary device and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113809680A true CN113809680A (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111148455.4A Pending CN113809680A (en) | 2021-09-26 | 2021-09-26 | Extra-high voltage strain tower end porcelain insulator replacement auxiliary device and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113809680A (en) |
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2021
- 2021-09-26 CN CN202111148455.4A patent/CN113809680A/en active Pending
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