CN108988215B - Laying method capable of adjusting height of high-voltage large-section cable line in proper position - Google Patents
Laying method capable of adjusting height of high-voltage large-section cable line in proper position Download PDFInfo
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- CN108988215B CN108988215B CN201810888941.1A CN201810888941A CN108988215B CN 108988215 B CN108988215 B CN 108988215B CN 201810888941 A CN201810888941 A CN 201810888941A CN 108988215 B CN108988215 B CN 108988215B
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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
- H02G1/06—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle
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Abstract
The invention relates to a laying construction method capable of adjusting the proper height of a high-voltage large-section cable line, which comprises the following steps of: (1) arranging a cable support; (2) erecting a scaffold, arranging a low-friction pulley on the scaffold, wherein the position of the low-friction pulley is slightly higher than that of the cable support; (3) arranging a hydraulic lifting platform of the cable conveyor, and arranging a cable conveyor rack on the hydraulic lifting platform; (4) adjusting the height of the hydraulic lifting platform of the cable conveyor to be slightly higher than the position of the cable support; (5) pre-laying a cable on a low-friction pulley; (6) after the cable is pre-laid, the cable is pushed into the cable support. Through the implementation of the construction method, the technical problem that a large number of secondary carrying efficiencies are low in the traditional cable laying process is solved, the quality hidden danger that the cable is damaged when being hung on a support due to human factors in the repeated process is avoided, the efficiency is improved, and meanwhile, the power supply reliability is improved.
Description
Technical Field
The invention belongs to the technical field of cable laying, and relates to a laying method capable of adjusting the proper height of a high-voltage large-section cable line.
Background
In recent years, the application of urban power transmission and distribution lines in China has become a remarkable development trend, the total length of the operated urban power transmission and distribution lines in Jiangsu province reaches more than 10 kilometers, the first part of the country is that the path length of 110 kV and 220kV cable lines reaches 3809 kilometers, and the urban power transmission and distribution lines become one of the main transmission forms of urban power supply. Among them, high-voltage large-section cables are the majority. The power supply reliability of the cable line is extremely high, once the cable line fails, the rush repair consumes long time and has high cost, and the social influence and the economic loss are huge.
High-voltage large-section cables are heavy, e.g. 2500mm in section of 220kV conductor2About 38kg of cable per meter, which makes the laying impossible by manpowerAnd (6) working. The traditional laying method of the high-voltage large-section cable is that after the ground pulley is laid on the ground, the cable is moved to a cable support section by section through a hoisting device, a large amount of secondary transportation is needed, and the efficiency is low; and because the cable weight is big, the quality hidden danger that the cable was gouged easily causes the cable to move to the support in-process in the human factor among the iterative process.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a construction method for laying a high-voltage large-section cable line with adjustable position and height, solves the problem of low efficiency of a large number of secondary transportation, avoids the quality hidden trouble that a cable is damaged in the process of mounting a bracket due to human factors in a repeated process, and improves the power supply reliability.
The invention specifically adopts the following technical scheme.
A laying construction method for adjusting the position-adaptable height of a high-voltage large-section cable line is characterized by comprising the following steps:
(1) arranging a cable bracket: determining the positions of cable supports during cable laying of different channels, and arranging the cable supports;
(2) erecting a scaffold: erecting a scaffold in the laying channel, and arranging a low-friction pulley on the scaffold, wherein the position of the low-friction pulley is slightly higher than that of a corresponding cable support;
(3) arranging a hydraulic lifting platform of a cable conveyor: arranging a hydraulic lifting platform of the cable conveyor in the laying channel, and arranging the cable conveyor on the hydraulic lifting platform of the cable conveyor;
(4) adjusting the height of the hydraulic lifting platform of the cable conveyor: placing one end of a cable on a cable conveyor, and adjusting the height of a hydraulic lifting platform of the cable conveyor;
(5) pre-laying a cable: pre-laying the cable on a low-friction pulley with the height slightly higher than that of the cable support, and pre-laying the cable along the low-friction pulley by a cable conveyor 4;
(6) finishing laying: and pushing the cable which is pre-laid into the cable bracket.
The invention further adopts the following preferred scheme:
in the step (1), specifically, when the cable support is laid in a cable trench, the distance from the uppermost layer of the cable support to the top of the trench is not less than 400mm, the distance between the cable supports is determined according to a snake-shaped laying mode, and when the cable support is in a vertical snake shape, the distance between the cable supports is a snake-shaped arc-pitch length; when the cable support is horizontally snakelike, the distance between the cable supports is the length of a snake-like arc half pitch; the distance between the lowest layer of the cable support and the groove bottom is not less than 50-100 mm; and laying 2-3 layers of brackets according to the requirement.
Specifically, when the cable support is vertically laid in the vertical shaft, the length of the cable support is determined according to the diameter, the number and the turning radius of the cable, the laying mode can adopt a mode of straight line laying, laying the cable into a free elbow at the bottom to absorb the expansion of the cable, and can also adopt a vertical snake-shaped laying mode. The number of the supports is 1 every 1.5-3m according to different laying methods.
In step (2), the scaffolds are arranged corresponding to the cable supports, each scaffold comprises a stand column and a cross bar, the cross bar is fixed on the stand column, and one end of each scaffold is connected with the corresponding cable support.
In step (2), a low friction pulley is mounted on the scaffold rail near one end of the cable support.
The height difference of the low-friction pulley relative to the corresponding cable bracket in the vertical direction is at least the height of one cable diameter, and the rolling friction coefficient of the low-friction pulley is not more than 0.2.
The scaffold is installed on one side of the channel, and a space for operators to pass through is reserved on the other side of the scaffold.
In the step (3), the hydraulic lifting platform of the cable conveyor is arranged on one side close to the upright post of the scaffold.
In step (4), the height of the hydraulic lifting platform of the cable conveyor is adjusted so that the vertical height of the cable on the cable conveyor is higher than the height of at least one cable diameter of the low-friction pulley
In the step (5), the cable is pre-laid on the low-friction pulleys installed on the scaffolds through the cable conveyor, so that the pre-laying of the cable is completed.
The invention has the following beneficial effects: by the construction method, the problem of low efficiency of a large number of secondary transportation is solved, the potential quality hazard that the bracket on the cable is damaged easily due to human factors in the repeated process is avoided, and the power supply reliability is improved while the efficiency is improved.
Drawings
FIG. 1 is a schematic view of the laying apparatus;
fig. 2 is a laying flow chart of the method.
Description of reference numerals: 1-scaffold, 2-low friction pulley, 3-cable conveyor hydraulic lifting platform, 4-conveyor, 5-cable support.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, the laying equipment related to the laying method for adjusting the height of the high-voltage large-section cable line in a proper position comprises a cable bracket 5 fixed on the side wall of a cable channel; the scaffold 1 is erected in the cable channel, the scaffold is installed on one side of the channel, a space for an operator to pass through is reserved on the other side of the channel, the low-friction pulley 2 is arranged on the scaffold 1, the height of the low-friction pulley 2 is slightly higher than that of the cable support 5, and the height from the low-friction pulley to the ground is 0.3-1.8 m; the hydraulic lifting platform 3 of the cable conveyor is arranged at the starting end of the cable laying channel, the cable conveyor 4 is erected on the hydraulic platform 3, and one end of a cable is placed on the cable conveyor 4.
Specifically, as shown in fig. 2, the specific construction of the high-voltage large-section cable line laying method capable of adjusting the height at the proper position comprises the following steps:
and (1) determining the positions of the cable supports when cables are laid in different channels. In the cable laying process, a culvert ditch and a vertical shaft are the most common laying channels, and 2-3 layers of cable supports are generally arranged as required when the cable is laid in the culvert ditch. Wherein, cable support the superiors should be not less than 400mm to the top of a ditch distance, and the cable support interval should be confirmed according to the mode of snakelike laying: when the cable support is in a vertical snake shape, the distance between the cable supports is a snake-shaped arc with a pitch length; when the cable support is horizontally snakelike, the distance between the cable supports is the length of a snake-like arc half pitch; the distance between the lowest layer of the cable support and the groove bottom is not less than 50-100 mm; and laying 2-3 layers of brackets according to the requirement.
When the cable support is vertically laid in a vertical shaft, particularly when the cable support is vertically laid in the vertical shaft, the length of the cable support is determined according to the diameter, the number and the turning radius of the cable, the laying mode can adopt a mode of straight line laying, laying the cable into a free elbow at the bottom to absorb the expansion of the cable, and a vertical snake-shaped laying mode can also be adopted. The number of the vertical laying supports is 1 at intervals of 1.5-3m according to different laying modes.
And (2) erecting a scaffold 1 in the cable channel. Wherein, scaffold 1 wholly leans on passageway one side installation, and the passageway opposite side supplies operating personnel to walk through. Scaffold frame 1 includes stand and horizontal pole, and the horizontal pole is fixed with stand cross, and the horizontal pole corresponds with cable support 5, and the one end setting of horizontal pole is on corresponding cable support 5. On the crossbar is arranged a low-friction pulley 2, which is located slightly above the cable holders and has a height difference in the vertical direction of at least one cable diameter with respect to the corresponding cable holder 5. The low-friction pulley adopted in the embodiment is the low-friction cable laying pulley disclosed in application number 200910034593.2, the rolling friction coefficient of the low-friction cable laying pulley is not more than 0.2, the friction force can be greatly reduced, the cable is effectively protected, the external force power for laying can also be reduced, and the external force for laying born by the cable is reduced so as to reduce the damage probability.
And (3) arranging a hydraulic lifting platform 3 of the cable conveyor in the laying channel, and placing the cable conveyor 4 on the hydraulic lifting platform 3 of the cable conveyor. The hydraulic lifting platform generally adopts a scissor type hydraulic lifting platform, particularly a double-hinged scissor type hydraulic lifting platform, the lifting stroke of the platform can be ensured to reach more than two times of the stroke of a hydraulic cylinder, and the requirement on the lifting height in the cable laying process is met.
One end of the cable in the step (4) is placed on the cable conveyor 4, and the height of the hydraulic lifting platform 3 of the cable conveyor is adjusted to a position slightly higher than the cable support 5; and at least a height of one cable diameter above the cable holder 5, preferably corresponding to the height of the low-friction pulley.
And (5) pre-laying the cable on the low-friction pulley 2 through the cable conveyor 4 to finish the pre-laying of the cable.
And (6) pushing the cables into the cable support 5 section by section after the cables are laid.
The invention provides a proper-position height-adjustable laying method aiming at the technical problems that the traditional high-voltage large-section cable laying method is low in efficiency and easy to cause the cable to be damaged when a bracket is arranged, the proper-position height-adjustable laying method is firstly provided, the scaffold is combined with a low-friction pulley and a hydraulic lifting platform of a cable conveyor, and the laying method with the height slightly higher than that of the cable bracket is adopted for pre-laying, so that the cable is pushed into the cable bracket only after the pre-laying is finished, the efficiency is high, and the quality hidden trouble that the bracket is easy to damage when the cable is arranged due to human factors in the repeated process is eliminated.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various modifications and equivalents may be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (6)
1. A laying construction method for adjusting the position-adaptable height of a high-voltage large-section cable line is characterized by comprising the following steps:
(1) arranging a cable bracket: determining the positions of the cable supports (5) during cable laying of different channels, and arranging the cable supports (5);
when laying in the cable culvert ditch, set up 2-3 layers of cable support, wherein, cable support the superiors should not be less than 400mm to the ditch top distance, and the cable support interval should be confirmed according to snakelike mode of laying: when the cable support is in a vertical snake shape, the distance between the cable supports is a snake-shaped arc with a pitch length; when the cable support is horizontally snakelike, the distance between the cable supports is the length of a snake-like arc half pitch; the distance between the lowest layer of the cable support and the groove bottom is not less than 50-100 mm;
when the cable is vertically laid in a vertical shaft, the length of the cable support is determined according to the diameter, the number and the turning radius of the cable, and the number of the supports is set to be 1 every 1.5-3 m;
(2) erecting a scaffold: erecting a scaffold (1) in the laying channel, arranging a low-friction pulley (2) on the scaffold (1), wherein the position of the low-friction pulley (2) is slightly higher than that of a corresponding cable support (5), and the height difference of the low-friction pulley (2) relative to the corresponding cable support (5) in the vertical direction is at least the height of one cable diameter;
the scaffold (1) is arranged corresponding to the cable supports (5), each scaffold (1) comprises a stand column and a cross bar, the cross bar is fixed on the stand column, and one end of each cross bar is connected with the corresponding cable support (5);
(3) arranging a hydraulic lifting platform of a cable conveyor: arranging a hydraulic lifting platform (3) of the cable conveyor in the laying channel, and arranging a cable conveyor (4) on the hydraulic lifting platform (3) of the cable conveyor;
(4) adjusting the height of the hydraulic lifting platform of the cable conveyor: one end of a cable is placed on a cable conveyor (4), and the height of a hydraulic lifting platform (3) of the cable conveyor is adjusted, so that the vertical height of the cable on the cable conveyor (4) is higher than the height of at least one cable diameter of the low-friction pulley (2);
(5) pre-laying a cable: pre-laying the cable on a low-friction pulley with the height slightly higher than that of the cable support (5), and pre-laying the cable along the low-friction pulley (2) through a cable conveyor (4);
(6) finishing laying: and pushing the cable which is pre-laid into a cable bracket (5).
2. The laying method for adjusting the height of the high-voltage large-section cable line according to claim 1, which comprises the following steps:
in the step (2), a low-friction pulley (2) is arranged on the cross bar of the scaffold (1) close to one end of the cable support (5).
3. A laying method for high-voltage large-section cable lines with adjustable position and height according to claim 1 or 2, which is characterized in that:
the low-friction pulley (2) has a rolling friction coefficient of not more than 0.2.
4. The laying method for adjusting the height of the high-voltage large-section cable line according to claim 1, which comprises the following steps:
the scaffold (1) is installed on one side of the channel, and a space for operators to pass through is reserved on the other side of the scaffold (1).
5. The laying method for adjusting the height of the high-voltage large-section cable line according to claim 1, which comprises the following steps:
in the step (3), the hydraulic lifting platform (3) of the cable conveyor is arranged on one side close to the upright post of the scaffold (1).
6. The laying method for adjusting the height of the high-voltage large-section cable line according to claim 1, which comprises the following steps:
in the step (5), the cable is pre-laid on the low-friction pulleys (2) arranged on the scaffolds (1) through the cable conveyor (4), so that the pre-laying of the cable is completed.
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| CN201810888941.1A CN108988215B (en) | 2018-08-07 | 2018-08-07 | Laying method capable of adjusting height of high-voltage large-section cable line in proper position |
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| CN201810888941.1A CN108988215B (en) | 2018-08-07 | 2018-08-07 | Laying method capable of adjusting height of high-voltage large-section cable line in proper position |
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| CN110994465A (en) * | 2019-11-29 | 2020-04-10 | 中国二十二冶集团有限公司 | High-span multi-turn high-voltage cable laying method |
| CN112310890B (en) * | 2020-10-21 | 2022-09-06 | 中色十二冶金建设有限公司 | Comprehensive pipe rack cable traction and displacement laying system and application method |
| CN113659505B (en) * | 2021-09-18 | 2022-10-21 | 上海电力设计院有限公司 | Cable erecting device and method |
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| CN108242780A (en) * | 2017-12-15 | 2018-07-03 | 中色十二冶金建设有限公司 | A kind of device and its laying method for being suitble to different occasion cable layings |
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| CN101383492B (en) * | 2008-10-30 | 2011-04-20 | 湖北省电力勘测设计院 | Cable snake shaped laying method |
| CN202737387U (en) * | 2012-06-07 | 2013-02-13 | 杨春 | Cable laying device |
| AU2013231096B2 (en) * | 2012-09-21 | 2016-08-25 | Hull, Kerry | Cable trailer |
| CN204083499U (en) * | 2014-08-29 | 2015-01-07 | 重庆工业设备安装集团有限公司 | Long distance sealed tube corridor interior conduit installs transmission positioning apparatus |
| CN204886016U (en) * | 2015-09-02 | 2015-12-16 | 葛洲坝集团电力有限责任公司 | Big high drop cable machinery of cross -section long distance exhibition system of putting |
| CN205265154U (en) * | 2015-12-23 | 2016-05-25 | 中国核工业第五建设有限公司 | Pulley type cable laying device |
| CN105896398B (en) * | 2016-05-18 | 2018-06-19 | 中国十九冶集团有限公司 | Large-section cable laying method |
| CN107872028B (en) * | 2016-09-27 | 2020-10-30 | 烟台中集来福士海洋工程有限公司 | Cable pulling and releasing auxiliary device, cable pulling and releasing device and cable pulling, releasing and binding method |
| CN106786193B (en) * | 2016-12-26 | 2018-08-21 | 浙江舟山启明电力集团公司海缆工程公司 | Long range intertidal zone submarine cable logs in cable laying operation operational method and system |
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