CN108206482B - Live replacement operation method for LF type yoke plate insulator without operation hole - Google Patents
Live replacement operation method for LF type yoke plate insulator without operation hole Download PDFInfo
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- CN108206482B CN108206482B CN201810064457.7A CN201810064457A CN108206482B CN 108206482 B CN108206482 B CN 108206482B CN 201810064457 A CN201810064457 A CN 201810064457A CN 108206482 B CN108206482 B CN 108206482B
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- yoke plate
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- 239000012212 insulator Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 241001397809 Hakea leucoptera Species 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000005452 bending Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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 relates to a live replacement operation technology of an insulator string, in particular to a live replacement operation method of an LF-type yoke plate insulator without an operation hole, which provides a front clamping fixture with a special swinging head, a rear clamping fixture, an insulation pull rod and a wire tightening screw rod, wherein the assembly of a replacement operation tool is finished on the ground, a bolt is positioned in advance, and the replacement operation tool is transmitted to an electrician on a tower through an insulation transmission rope after the electrician on the tower reaches a designated working position; the electrician on the two towers cooperates with the operation to replace the working tool, the installation of the front clamp is finished firstly, the rear clamp is installed, and finally the insulator string is loosened through the wire tightening screw rod to replace. The invention has the advantages of simple structure and convenient operation, and effectively realizes the connection with the LF-type yoke plate without the operation hole, thereby further realizing the live replacement operation of the LF-type yoke plate insulator string without the operation hole, providing technical support for detecting and overhauling the insulator string, effectively reducing the power failure time of a line and improving the running reliability of a power grid.
Description
Technical Field
The invention relates to a live replacement operation technology of an insulator string, in particular to a live replacement operation method of an LF-type yoke plate insulator without an operation hole. The invention aims at LF type yoke plate without operation hole.
Background
The L-LF type is an assembly type of an insulator string, namely, hardware fittings at two ends of a 220kV line tension duplex insulator adopt L-shaped connecting plates (cross arm sides) and LF-shaped connecting plates (wire sides) to be matched and installed, and the LF-shaped connecting plates have the advantages of being mainly capable of being directly connected with double split wires, not needing to additionally increase the connecting plates and reducing the material consumption. LF type yoke plates are called rectangular yoke plates, which are very widely used in the line, but have various forms and are mainly characterized in that: the four corners of the plate surface are connected with the hardware fitting and are divided into an operation hole and a non-operation hole, and the operation hole is hollow and is not hollow.
The right of the invention has tool design on an oval hollowed-out type LF type yoke plate in 2013, and the technology is applied to line maturation and achieves important effects. However, the oval hollowed-out type LF type yoke plate provides an oval slot hole for the fixture, but the LF type yoke plate without the operation hole has no operation hole and hollowed-out, and the existing fixture needs enough fixing points and supporting points, and the oval hollowed-out type LF type yoke plate can provide a supporting installation point. Therefore, the special form of the LF type yoke plate without the operation hole brings great inconvenience to overhaul, and in 2015, when the 220kV Li Shen I, II line is subjected to annual insulator sampling and inspection, the LF type yoke plate insulator string without the operation hole is adopted for assembly, and the LF type yoke plate cannot be replaced by live working, so that the detection is impossible and the overhaul is difficult.
Disclosure of Invention
The invention aims to provide the live replacement operation method for the LF-type yoke plate insulator without the operation hole, which can realize live replacement of the insulator, is simple and convenient to operate and has a simple structure according to the defects of the prior art.
The object of the invention is achieved by the following means:
the hot-line replacement operation method of the LF type yoke plate insulator without the operation hole is characterized by comprising the following steps of:
the method comprises the following steps of providing a replacing operation tool, comprising a front clamp, a rear clamp, an insulating pull rod and a wire tightening screw rod, wherein the rear clamp is a bending clamp; the front card comprises a left card and a right card, the right card is a straight board card, and the free end part of the right card is provided with a connecting part; the left clamp is an arc-shaped fork plate clamp and comprises a clamp body and a clamp head, an opening fork groove is formed in the middle of the fork plate clamp, the fork groove extends to the clamp head from the clamp body, the bottom end face of the fork groove is positioned at the junction of the left clamp and the right clamp, the clamp head is of a swinging head structure, the swinging head swings to the left front side direction along the extending direction of the clamp body, a pin hole is formed in one end, close to the clamp head, of the clamp body, a pin bush is arranged on the outer side face of one end of the pin hole, a bolt with a spring component is arranged in the pin bush, and an operating mechanism is arranged on the bolt; an operation hanging ring is arranged at the junction of the left card and the right card;
the ground electrician assembles the replacement working tool, connect the connecting portion of the free end of right card in the front card with front end of the insulating pulling plate, the bolt on the left card body withdraws back into the pin sleeve and is pre-tightened and limited through the spring component, the wire tightening screw rod is mounted on rear end of the insulating pulling plate, an end of the right card is fixedly connected with wire tightening screw rod;
the electrician #1 and the electrician #2 carry an insulation transmission rope to climb the tower to the corresponding working positions on the cross arm, after the safety belts are respectively fastened, the insulation transmission rope is hung in a matched mode, and the ground electrician transfers the assembled replacement working tool and the assembled operation rod to the tower through the insulation transmission rope to the electrician #1 and the electrician # 2;
the wire tightening screw rod is held by an electrician #1, an operation rod is used for hooking an operation hanging ring on the left clamp of the front clamp by the electrician #2, the front clamp is lifted, the two persons are matched with each other to push the assembled replacement operation tool from the side of the cross arm to the side of the wire until the front clamp reaches the position above the LF type connecting plate, and the clamp head of the front clamp is adjusted to be aligned with the short side of the LF type connecting plate;
the front clamp is inserted between two bolts at one side of the short side of the LF type yoke plate until the bottom end surface of the front clamp fork groove is close to the short side of the LF type yoke plate, the long side of the LF type yoke plate is exposed by the clamping head, the clamping body is close to the bolts on the LF type yoke plate, at the moment, the front clamp is completely connected with the LF type yoke plate in a fork manner,
the electrician #2 removes the operating lever from the front card, and uses the operating lever to dial the operating mechanism on the bolt, the bolt breaks away from the limit of the spring component and inserts the pinhole on the card body automatically, the front card is mounted in place up to this point;
and #1 electrician installs the rear clamp on the yoke plate at the side of the cross arm, operates the wire tightening screw rod until the replacement working tool is in a stressed state, checks that the connection parts of the tool are not abnormal, continues to loosen the wire tightening screw rod to the insulator string, and finally replaces the insulator string.
The clamping head swings to the opposite direction (right) to the extending direction of the right clamping to the insulating operation rod, the original left clamping body is in an upward curved state on the basis of the right clamping body, the clamping head is not upward any more, but swings to the left directly, so that a Z-shaped curve structure is formed, the structure can facilitate the guiding and butting operation of the clamping device and the connecting plate, the space between the upper bolt and the lower bolt at the short side of the connecting plate is extremely limited, the front clamping is a long-distance operation device, and therefore, the clamping device is difficult to operate by only adopting a curved plate clamp, however, if the plate clamp with smaller curvature is adopted, the curvature is insufficient to pack the clamping bolt, the clamping body becomes longer, the supporting point is unstable, and the operation is more inconvenient.
The distance between the clamping body and the bottom end surface of the fork groove is just matched with the distance from the short side of the side surface to the long side of the LF type yoke plate around one bolt, so when the front clamp is installed, the bottom end surface of the fork groove is just close to the short side of the yoke plate, the bolt is limited on the long side of the yoke plate, and the Zuo Kaka body just carries out half-wrapping on the bolt at the angle of the yoke plate, thereby forming three supporting points: the end face of the bottom of the fork groove, the short plate of the yoke plate, the long edge of the bolt and the yoke plate, the clamping body and the bolt are mutually limited, so that the fixed connection of the front clamp and the LF yoke plate is completed, the feasibility of live replacement of the insulator is realized, the operation is simple and convenient, and the structure is also simple. The invention effectively improves the capability of eliminating equipment defects in live working, expands the application range of live working, has high working efficiency, can effectively reduce the power failure time of a line and improves the running reliability of a power grid.
The invention is further specifically:
the front clamping head is in a horn-shaped structure, and the connecting part of the clamping body extends outwards to form an external horn-shaped structure.
Or, the front clamping head is of an inner horn type structure, and two side plates of the front clamping head are of an inner horn type which is gradually thinned outwards from the joint of the clamping body. At this time, the outer side surface of the clamping head is extended from the clamping body with equal width.
The fork groove width of card body department just in time adapts to the thickness of LF type yoke plate, and in order to further make the dop can fork the yoke plate more easily, can make the dop outer loudspeaker formula structure, the both sides board of dop department all outwards opens in such structure for the fork groove width of dop department is greater than the thickness of LF type yoke plate, thereby can be more convenient for introduce and fork the yoke plate. The optimal selection is to adopt an inner horn type structure, because in practical application, the outer horn mouth has a curved surface and a structure protruding out of the clamping body, and the manufacturing and the operation are inconvenient; the outer side surface of the clamping head of the inner horn type structure is as wide as the clamping body, but the width of the fork groove of the horn mouth is larger than the thickness of the LF type yoke plate, so that the yoke plate can be conveniently inserted and connected further, and the problems are avoided.
In summary, the invention provides a live-line replacement operation method for an LF-type yoke plate insulator without an operation hole, which adopts a curved left clamp with a swinging head, and can effectively realize connection with the LF-type yoke plate without the operation hole, thereby further realizing live-line replacement operation of the LF-type yoke plate insulator string without the operation hole, providing technical support for detecting and overhauling the insulator string without the operation hole, effectively reducing power failure time of a line and improving operation reliability of a power grid.
Drawings
Fig. 1 is a schematic structural diagram of a front card for live replacement operation of an LF-type yoke insulator without an operation hole according to the present invention.
FIG. 2 is a cross-sectional view in the B-direction of the front chuck portion of FIG. 1; fig. 3 is a top view of fig. 1.
FIG. 4 is a schematic diagram showing the connection between a replacement tool and a yoke plate during the live replacement of an insulator string according to the present invention.
Detailed Description
Best mode for carrying out the invention:
referring to fig. 1 and 3, the front clamp for the live replacement operation of the LF-type yoke insulator without the operation hole comprises a left clamp 1 and a right clamp 2, wherein the right clamp 2 is a straight clamp, the free end part of the right clamp is connected with an insulating operation rod 3, the left clamp 1 is a bent arc-shaped yoke plate clamp and comprises a clamp body 11 and a clamp head 12, an opening yoke groove 13 is formed in the middle of the yoke plate clamp, the clamp body 11 extends to the clamp head 12, the bottom end face A of the yoke groove 13 is positioned at the junction of the left clamp 1 and the right clamp 2, and when the left clamp 1 is mounted on a yoke plate 4, the bottom end face A is just in close contact with the short side of the yoke plate 4.
Referring to fig. 1 in combination with fig. 2, the chuck 12 is a swing head structure, the swing head swings to the left front side along the extending direction of the chuck body, the chuck body 11 is in an upward curved state on the basis of the right chuck 2, the chuck body is not upward, and the chuck body swings to the left directly to become the chuck body, thereby forming a Z-shaped curve structure. The clamping head is of an inner horn structure, two side plates of the clamping head are of an inner horn shape which is gradually thinned outwards from the joint of the clamping body, and the inner side face of the clamping head is of an outer slope structure from the joint of the clamping body, so that the width of the clamping head is gradually widened outwards from the joint of the clamping body. At this time, the outer side surface of the clamping head is as wide as the clamping body.
Referring to fig. 3, a pin hole 5 is formed at one end of the clamping body, which is close to the clamping head, a pin sleeve 6 is arranged on the outer side surface of one end of the pin hole, a bolt with a spring component is arranged in the pin sleeve 6, and an operating mechanism 7 is arranged on the bolt; the left card or the right card is provided with a hanging ring 8.
Referring to fig. 4, the method for live replacement of the LF-type yoke plate insulator without the operation hole comprises the following steps of
The method comprises the following steps of providing a replacing operation tool, comprising a front clamp K1, a rear clamp K2, an insulating pull rod K3 and a wire tightening screw rod K3, wherein the rear clamp is a bending clamp; an operation hanging ring is arranged at the junction of the left card and the right card in the front card;
the ground electrician assembles the replacement working tool, connect the connecting portion of the free end of right card in the front card with front end of the insulating pulling plate, the bolt on the left card body withdraws back into the pin sleeve and is pre-tightened and limited through the spring component, the wire tightening screw rod is mounted on rear end of the insulating pulling plate, an end of the right card is fixedly connected with wire tightening screw rod;
the electrician #1 and the electrician #2 carry an insulation transmission rope to climb the tower to the corresponding working positions on the cross arm, after the safety belts are respectively fastened, the insulation transmission rope is hung in a matched mode, and the ground electrician transfers the assembled replacement working tool and the assembled operation rod to the tower through the insulation transmission rope to the electrician #1 and the electrician # 2;
the wire tightening screw rod is held by an electrician #1, an operation rod is used for hooking an operation hanging ring on the left clamp of the front clamp by the electrician #2, the front clamp is lifted, the two persons are matched with each other to push the assembled replacement operation tool from the side of the cross arm to the side of the wire until the front clamp reaches the position above the LF type connecting plate, and the clamp head of the front clamp is adjusted to be aligned with the short side of the LF type connecting plate;
the front clamp is inserted between two bolts at one side of the short side of the LF type yoke plate until the bottom end surface of the front clamp fork groove is close to the short side of the LF type yoke plate, the long side of the LF type yoke plate is exposed by the clamping head, the clamping body is close to the bolts on the LF type yoke plate, at the moment, the front clamp is completely connected with the LF type yoke plate in a fork manner,
the electrician #2 removes the operating lever from the front card, and uses the operating lever to dial the operating mechanism on the bolt, the bolt breaks away from the limit of the spring component and inserts the pinhole on the card body automatically, the front card is mounted in place up to this point;
and #1 electrician installs the rear clamp on the yoke plate at the side of the cross arm, operates the wire tightening screw rod until the replacement working tool is in a stressed state, checks that the connection parts of the tool are not abnormal, continues to loosen the wire tightening screw rod to the insulator string, and finally replaces the insulator string.
After the front clamp is installed, the bottom end surface of the fork groove is just in time close to the short side of the yoke plate, the bolt is limited on the long side of the yoke plate, and the Zuo Kaka body just in time carries out half-wrapping close to the bolt at the angle of the yoke plate, so that three supporting points are formed: the end face of the bottom of the fork groove, the short plate of the yoke plate, the long edges of the bolt and the yoke plate, the clamping body and the bolt are mutually limited, so that the front clamp and the LF type yoke plate are fixedly connected. The invention solves the problem that the insulator string on the LF type yoke plate without the operation hole is difficult to be replaced in a live-line way, expands the application range of live-line operation, effectively reduces the power failure time of a line and improves the running reliability of a power grid.
The invention is not described in part as in the prior art.
Claims (3)
1. The live replacement operation method of the LF type yoke plate insulator without the operation hole is characterized by comprising the following steps of:
the method comprises the following steps of providing a replacing operation tool, comprising a front clamp, a rear clamp, an insulating pull rod and a wire tightening screw rod, wherein the rear clamp is a bending clamp; the front card comprises a left card and a right card, the right card is a straight board card, and the free end part of the right card is provided with a connecting part; the left clamp is an arc-shaped fork plate clamp and comprises a clamp body and a clamp head, an opening fork groove is formed in the middle of the fork plate clamp, the fork groove extends to the clamp head from the clamp body, the bottom end face of the fork groove is positioned at the junction of the left clamp and the right clamp, the clamp head is of a swinging head structure, the swinging head swings to the left front side direction along the extending direction of the clamp body, a pin hole is formed in one end, close to the clamp head, of the clamp body, a pin bush is arranged on the outer side face of one end of the pin hole, a bolt with a spring component is arranged in the pin bush, and an operating mechanism is arranged on the bolt; an operation hanging ring is arranged at the junction of the left card and the right card;
the ground electrician assembles the replacement working tool, connect the connecting portion of the free end of right card in the front card with front end of the insulating pulling plate, the bolt on the left card body withdraws back into the pin sleeve and is pre-tightened and limited through the spring component, the wire tightening screw rod is mounted on rear end of the insulating pulling plate, an end of the right card is fixedly connected with wire tightening screw rod;
the electrician #1 and the electrician #2 carry an insulation transmission rope to climb the tower to the corresponding working positions on the cross arm, after the safety belts are respectively fastened, the insulation transmission rope is hung in a matched mode, and the ground electrician transfers the assembled replacement working tool and the assembled operation rod to the tower through the insulation transmission rope to the electrician #1 and the electrician # 2;
the wire tightening screw rod is held by an electrician #1, an operation rod is used for hooking an operation hanging ring on the left clamp of the front clamp by the electrician #2, the front clamp is lifted, the two persons are matched with each other to push the assembled replacement operation tool from the side of the cross arm to the side of the wire until the front clamp reaches the position above the LF type connecting plate, and the clamp head of the front clamp is adjusted to be aligned with the short side of the LF type connecting plate;
the front clamp is inserted between two bolts at one side of the short side of the LF type yoke plate until the bottom end surface of the front clamp fork groove is close to the short side of the LF type yoke plate, the long side of the LF type yoke plate is exposed by the clamping head, the clamping body is close to the bolts on the LF type yoke plate, at the moment, the front clamp is completely connected with the LF type yoke plate in a fork manner,
the electrician #2 removes the operating lever from the front card, and uses the operating lever to dial the operating mechanism on the bolt, the bolt breaks away from the limit of the spring component and inserts the pinhole on the card body automatically, the front card is mounted in place up to this point;
and the #1 electrician installs the rear clamp on the yoke plate at the side of the cross arm, operates the wire tightening screw rod until the replacement working tool is in a stressed state, checks that the connection parts of the tool are not abnormal, continues to loosen the wire tightening screw rod to the insulator string, and finally the #1 electrician and the #2 electrician are matched to replace the insulator string.
2. The method for live replacement of an LF-type yoke plate insulator without an operation hole according to claim 1, wherein the chuck has a horn-type structure, and the joint of the chuck body extends outward to form an outer horn-type shape.
3. The method for live replacement of LF-type yoke plate insulator without operation hole according to claim 1, wherein the chuck has an inner horn structure, and the two side plates of the chuck have an inner horn shape gradually thinned from the joint of the chuck body to the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064457.7A CN108206482B (en) | 2018-01-23 | 2018-01-23 | Live replacement operation method for LF type yoke plate insulator without operation hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810064457.7A CN108206482B (en) | 2018-01-23 | 2018-01-23 | Live replacement operation method for LF type yoke plate insulator without operation hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108206482A CN108206482A (en) | 2018-06-26 |
| CN108206482B true CN108206482B (en) | 2024-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810064457.7A Active CN108206482B (en) | 2018-01-23 | 2018-01-23 | Live replacement operation method for LF type yoke plate insulator without operation hole |
Country Status (1)
| Country | Link |
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| CN (1) | CN108206482B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299519A (en) * | 2008-03-06 | 2008-11-05 | 福建省厦门电业局 | Hanging type insulator string electrification altering apparatus interlocked with a two-connection plate |
| JP2013046535A (en) * | 2011-08-26 | 2013-03-04 | Tokyo Electric Power Co Inc:The | Replacing unit for insulator or the like of insulator device for power transmission |
| CN103227431A (en) * | 2013-03-19 | 2013-07-31 | 国家电网公司 | Method for replacing insulator chains in 220 kV long-span high tower in live working |
| WO2014012196A1 (en) * | 2012-07-16 | 2014-01-23 | 山西省电力公司太原供电分公司 | Live working manipulator for replacing insulator string |
| CN103683107A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | Front clamp for LF type insulator string live replacement |
| CN103683108A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | LF type connecting plate fixture for 220kV line insulator string live replacement |
| CN103683110A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | L-LF type insulator string ground potential live replacement method |
| WO2015078279A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Live overhaul process for ±800 kv ultra-high voltage dc power transmission line |
| CN207947553U (en) * | 2018-01-23 | 2018-10-09 | 国网福建省电力有限公司 | The preceding card of no handle hole LF types yoke plate isolator hot-line replacing operation |
-
2018
- 2018-01-23 CN CN201810064457.7A patent/CN108206482B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299519A (en) * | 2008-03-06 | 2008-11-05 | 福建省厦门电业局 | Hanging type insulator string electrification altering apparatus interlocked with a two-connection plate |
| JP2013046535A (en) * | 2011-08-26 | 2013-03-04 | Tokyo Electric Power Co Inc:The | Replacing unit for insulator or the like of insulator device for power transmission |
| WO2014012196A1 (en) * | 2012-07-16 | 2014-01-23 | 山西省电力公司太原供电分公司 | Live working manipulator for replacing insulator string |
| CN103227431A (en) * | 2013-03-19 | 2013-07-31 | 国家电网公司 | Method for replacing insulator chains in 220 kV long-span high tower in live working |
| WO2015078279A1 (en) * | 2013-11-27 | 2015-06-04 | 国家电网公司 | Live overhaul process for ±800 kv ultra-high voltage dc power transmission line |
| CN103683107A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | Front clamp for LF type insulator string live replacement |
| CN103683108A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | LF type connecting plate fixture for 220kV line insulator string live replacement |
| CN103683110A (en) * | 2013-12-26 | 2014-03-26 | 国家电网公司 | L-LF type insulator string ground potential live replacement method |
| CN207947553U (en) * | 2018-01-23 | 2018-10-09 | 国网福建省电力有限公司 | The preceding card of no handle hole LF types yoke plate isolator hot-line replacing operation |
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|---|---|
| CN108206482A (en) | 2018-06-26 |
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