CN113319412A - Processing method for cable line to penetrate through pre-buried steel pipe - Google Patents
Processing method for cable line to penetrate through pre-buried steel pipe Download PDFInfo
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- CN113319412A CN113319412A CN202110720720.5A CN202110720720A CN113319412A CN 113319412 A CN113319412 A CN 113319412A CN 202110720720 A CN202110720720 A CN 202110720720A CN 113319412 A CN113319412 A CN 113319412A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 158
- 239000010959 steel Substances 0.000 title claims abstract description 158
- 238000003672 processing method Methods 0.000 title claims abstract description 28
- 238000005520 cutting process Methods 0.000 claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000003466 welding Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 48
- 230000005347 demagnetization Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000013598 vector Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
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- 238000005219 brazing Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
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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
- H02G1/08—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for laying cables, e.g. laying apparatus on vehicle through tubing or conduit, e.g. rod or draw wire for pushing or pulling
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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
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to the technical field of cable engineering construction, in particular to a processing method for a cable line to penetrate through an embedded steel pipe, which comprises the following steps: the method comprises the following steps: prefabricating a supporting platform and a transportation part according to the size of the embedded steel pipe; step two: flatly placing a support platform into the embedded steel pipe, wherein the support platform penetrates through the whole embedded steel pipe section; placing the transportation part on a supporting platform, fixing a cutting device on the transportation part, and positioning a nozzle of the cutting device towards the inner wall of the embedded steel pipe; step three: starting the cutting device, driving the cutting device to move forward along the supporting platform by operating the conveying part, and enabling the cutting device to cut along the whole process of the inner wall of the embedded steel pipe to form a through gap; step four: and (5) enabling the cable line to penetrate through the cut embedded steel pipe. The invention cuts the embedded magnetic steel pipe in the whole process to break the magnetic steel pipe closed magnetic circuit, and creates implementation conditions for a single cable to pass through the steel pipe.
Description
Technical Field
The invention relates to the technical field of cable engineering construction, in particular to a processing method for a cable line to penetrate through an embedded steel pipe.
Background
In the electric power engineering construction process, the cable line engineering often can not satisfy cable line laying professional technical requirement and be difficult to impel the construction process because of unit civil engineering pre-buried steel pipe (have magnetism) before the station: or the inner aperture of the steel pipe is insufficient, and the requirement that the same steel pipe passes through three-phase 110kV cables at the same time is not met, so that the magnetic flux vector cannot be offset; or the material of the single-phase cable passing through the steel pipe does not meet the professional requirements, when the single three-phase alternating current cable passes through the steel pipe, a closed magnetic circuit is formed to generate eddy current, so that the cable is heated and burnt and damaged, therefore, the steel pipe needs to be subjected to slotting or steel pipe demagnetization treatment, otherwise, the steel pipe is not allowed to pass through the single cable to be laid.
In view of the fact that steel pipes with deeper soil covering or embedded reinforced concrete structures relate to a large amount of earth excavation or reinforced concrete breaking, construction difficulty is high, safety risk requirements are high, green belt planting needs to be carried out after earth backfilling, and construction cost is high; if the steel pipe is processed by adopting a demagnetization mode, the demagnetization effect of the conventional alternating current and direct current modes is poor, permanent demagnetization cannot be realized in the conventional demagnetization technical field, and related demagnetization equipment cannot be implemented in an underground pipe-burying environment and cannot have demagnetization conditions.
In the past, when a person skilled in the art faces a construction environment in which a single three-phase cable needs to be laid by cutting an embedded steel pipe, the embedded steel pipe is generally short, about 300 mm-500 mm, and the original method of cutting a seam by a hand-held angle grinder is adopted and is manually accessible; however, the method is slow and laborious to cut, and cannot be applied to pre-buried magnetic steel pipes with long lengths. With the continuous expansion of the construction scale of the electric power engineering, the frequency of the reserved steel pipes crossing civil engineering in the cable line engineering is higher and higher, and a reasonable and effective processing method needs to be researched so as to solve the difficult problem of underground deep-buried and longer magnetic steel pipe slotting, eliminate the phenomena of eddy current and heating generated when a three-phase single cable passes through a closed loop and overcome the difficulty in the construction process.
Disclosure of Invention
The invention aims to: aiming at the problems that in the prior art, a three-phase single cable needs to be laid due to insufficient inner diameter of an underground deep-buried and longer magnetic steel pipe, but a closed magnetic circuit is formed when a three-phase single alternating current cable passes through an embedded steel pipe, so that the cable is heated and burnt and damaged, the processing method for the cable line to pass through the embedded steel pipe is provided, the difficult problem of slotting of the underground deep-buried and longer magnetic steel pipe is solved, the phenomena of eddy current and heating generated when the three-phase single cable passes through the closed circuit are eliminated, and the construction difficulty is overcome.
In order to achieve the purpose, the invention adopts the technical scheme that:
a processing method for a cable line to penetrate through an embedded steel pipe comprises the following steps:
the method comprises the following steps: prefabricating a supporting platform and a transportation part according to the size of the embedded steel pipe;
step two: flatly placing a support platform into the embedded steel pipe, wherein the support platform penetrates through the whole embedded steel pipe section; placing the transportation part on a supporting platform, fixing a cutting device on the transportation part, and positioning a nozzle of the cutting device towards the inner wall of the embedded steel pipe;
step three: starting the cutting device, driving the cutting device to move forward along the supporting platform by operating the conveying part, and enabling the cutting device to cut along the whole process of the inner wall of the embedded steel pipe to form a through gap;
step four: and (5) enabling the cable line to penetrate through the cut embedded steel pipe.
According to the processing method for the cable line to penetrate through the embedded steel pipe, a stable cutting platform is formed in the round embedded steel pipe by using the supporting platform according to the construction environment of the embedded steel pipe, the conveying part is used for driving the cutting device to run along the supporting platform, a straight-through wide gap can be cut on the inner wall of the magnetic steel pipe which is deeply buried underground and long, the purpose of breaking a closed magnetic circuit of the magnetic steel pipe is achieved, implementation conditions are created for a single three-phase cable to penetrate through the embedded steel pipe, the phenomenon that a closed magnetic circuit is formed when the single three-phase alternating current cable penetrates through the steel pipe to generate eddy current is avoided, and the problems that the cable is heated and burnt and damaged are solved.
The processing method provided by the invention provides favorable conditions for the single cable line to pass through the embedded steel pipe, is flexible and convenient to construct, improves the construction efficiency to a great extent, and greatly reduces the construction difficulty.
Preferably, the transportation part adopts a flat car with rollers, the flat car is provided with a telescopic rod, and the flat car is pushed by manually holding the telescopic rod; or the transportation component adopts a remote control car, and the cutting speed and direction of the cutting device are controlled in a Bluetooth remote control mode.
Preferably, in step two, place the transportation part back on supporting platform, set up the camera on the transportation part, convey the cutting image in the pre-buried steel pipe to display terminal through the camera and show, make things convenient for operating personnel to adjust work on next step according to the live thing of cutting, guarantee cutting quality and construction safety.
Preferably, in step three, in the process of cutting the inner wall of the embedded steel pipe by the cutting device, the embedded steel pipe is cut while an operator pushes the transportation part to move forward according to an image fed back by the camera, and the angle of a nozzle of the cutting device is adjusted by pulling cables of the cutting device left and right, so that the embedded steel pipe is adaptive to actual working conditions and flexible in construction.
Preferably, the handheld telescopic rod moves forwards at a slotting speed of 160-180 seconds/meter, the operation is stable, and the cutting speed is high.
Preferably, in the third step, when the flatbed is pushed to advance by the telescopic rod for cutting, the telescopic rod is lengthened along with the cutting process so as to adapt to the construction environment; the lengthening method comprises the following steps: the first section of telescopic rod is connected with the second section of telescopic rod through the sleeve piece, the two sections of telescopic rods are in threaded connection with the sleeve piece, and the like.
Preferably, the first section of telescopic rod is welded with the tail end of the flat car.
Preferably, the supporting platform adopts the spout, and in step two, after putting into pre-buried steel pipe with a section of prefabricated spout, continue to lengthen a section spout at the tail end of spout and become whole, the total length of spout satisfies cutting device can cut the whole requirement of pre-buried steel pipe to the processing of drawing materials of adaptation outside construction space. The total length of the sliding groove can be longer than that of the embedded steel pipe, can be basically consistent and can be slightly shorter.
Preferably, the sliding grooves at two adjacent ends are in butt welding connection.
Preferably, the sliding groove is made of two sections of angle steels, the two sections of angle steels are arranged oppositely, and the two sections of angle steels are welded together transversely through at least two connecting plates, so that the two sections of angle steels form a whole.
Preferably, the cutting device adopts a plasma cutting machine, and the cutting speed is high and stable.
Preferably, cutting the pre-buried steel pipe is carried out in the cable shaft, avoids the construction mode that the earthwork excavation or reinforced concrete abolished, reduces the construction degree of difficulty, improves efficiency of construction and cost, reduces the construction risk.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the processing method for the cable line to penetrate through the embedded steel pipe, a stable cutting platform is formed in the round embedded steel pipe by using the supporting platform according to the construction environment of the embedded steel pipe, the conveying part is used for driving the cutting device to run along the supporting platform, a straight-through wide gap can be cut out of the underground deeply-buried and longer magnetic steel pipe in the whole process, the purpose of breaking a closed magnetic circuit of the magnetic steel pipe is achieved, implementation conditions are created for a single three-phase cable to penetrate through the embedded steel pipe, the phenomenon that a closed magnetic circuit is formed when the single three-phase alternating current cable penetrates through the steel pipe to generate eddy current is avoided, and the problems that the cable is heated and burnt and damaged are solved.
2. According to the processing method for the cable line to penetrate through the embedded steel pipe, the plasma cutting machine equipment is used for cutting the underground embedded steel pipe for the first time, and compared with the traditional cutting mode of a handheld angle grinder, the processing method is labor-saving and high in cutting efficiency; the complete set of slotting device is matched with the plasma cutting machine for use, so that the plasma cutting machine has feasibility when being used for construction in the environment of underground embedded steel pipes, the difficult construction problem is solved, the treatment method is simple and feasible, flexible, convenient, economical and practical, the construction difficulty is reduced to a great extent, and the construction efficiency is improved.
3. The processing method for the cable line to penetrate through the embedded steel pipe avoids special construction and vegetation restoration of a deep foundation pit with great difficulty and more complicated related matters; through budget, the cost is directly saved by 23 ten thousand yuan, and better economic benefit is obtained.
4. The treatment method for the cable line to penetrate through the pre-buried steel pipe has the advantages of wide material source, simple treatment, suitability for underground deep burying or pre-burying of a longer magnetic steel pipe in a reinforced concrete structure, suitability for construction in a narrow space, capability of providing powerful technical support for similar problems in the later construction process and capability of directly guiding practical construction application.
Drawings
Fig. 1 is a process flow of the cable line passing through the embedded steel pipe.
Fig. 2 is a schematic structural view of a slitting device for underground steel pipes.
FIG. 3 is a schematic view of the use state of the slotting device when the slotting device is used for slotting construction of underground embedded steel pipes.
Fig. 4 is a schematic view of the structure of the flatcar assembly in the chute.
Fig. 5 is a schematic cross-sectional view of the slitting device when it is in the pre-buried steel pipe.
Fig. 6 is a schematic structural view of an adjustable bracket in embodiment 2.
FIG. 7 is a schematic top view of the adjustable bracket.
Fig. 8 is a schematic view of the connection structure of the adjustable telescopic rod.
Icon: 1, pre-burying a steel pipe; 2-a chute; 3-flatbed vehicle; 4, a telescopic rod; 41-a sleeve member; 42-sub-rods; 5-a bracket; 51-a bearing; 52-top cap; 53-a base; 54-a ridge; 6-a camera; 7-a mobile power supply; 8-a limiting plate; 9-plasma cutter; 91-a case; 92-a plasma gun; 93-a cable; 10-an air compressor; 11-a distribution box; 12-gap.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
In the power cable line project outside a certain subway line of 110kV, the total length of the cable line is 8.6 kilometers, wherein 6 kilometers share a municipal administration comprehensive pipe gallery, and 3 steel pipes are reserved in a concrete structure at the two ends of a pipe gallery for passing through and transition of the 110kV cable; each steel pipe is pre-buried to the cable shaft from the top end of the side wall of the gallery through a concrete structure, and the sizes of the cable shaft are 3 multiplied by 1.5 multiplied by 2m and 3 multiplied by 1.5 multiplied by 3.1m respectively. The depth of soil covering and burying of the steel pipe at the corridor end is 6.1 meters, the length of the steel pipe is 5.5 meters, and the inner diameter phi of the steel pipe is 200 mm; the depth of soil covering and burying at the gallery end is 3.1 meters, the length of the steel pipe is 1.8 meters, and the inner diameter phi of the steel pipe is 300 mm. The inner diameter of the steel pipe does not meet the requirement that the same steel pipe passes through three-phase 110kV cables simultaneously to offset magnetic flux vectors.
In this embodiment, based on the limited construction environment of the underground deep-buried and long magnetic steel pipe, a single three-phase cable line needs to pass through the embedded steel pipe, so as to avoid the phenomena of eddy current and heating generated when a single cable passes through a closed loop and overcome the construction difficulty, and a processing method for the cable line to pass through the embedded steel pipe 1 is provided, as shown in fig. 1 to 8, the implementation steps mainly include:
the method comprises the following steps: prefabricating a supporting platform and a transportation part according to the size of the embedded steel pipe 1;
step two: flatly placing a support platform into the embedded steel pipe 1, wherein the support platform penetrates through the whole pipe section of the embedded steel pipe 1; placing the transportation part on a supporting platform, fixing a cutting device on the transportation part, and positioning a nozzle of the cutting device towards the inner wall of the embedded steel pipe 1;
step three: starting the cutting device, driving the cutting device to advance along the supporting platform through the conveying part, and enabling the cutting device to cut along the whole inner wall of the embedded steel pipe 1 to form a through gap 12;
step four: and (5) enabling the cable line to penetrate through the cut embedded steel pipe 1.
Wherein, the supporting platform can adopt a chute 2; the transportation part can adopt a structure of a self-made flat car 3, the flat car is pushed by manually holding the telescopic rod 4, and the cutting speed and direction of the cutting device are controlled by a remote control way through Bluetooth; the cutting device employs a plasma cutter 9.
According to the processing method for the cable line to penetrate through the embedded steel pipe 1, according to the construction environment of the embedded steel pipe 1, a supporting platform is utilized to form a stable cutting platform in the round embedded steel pipe 1, a conveying part is utilized to drive a cutting device to run along the supporting platform, a straight-through wide gap 12 can be cut out of the underground deep-buried and long magnetic steel pipe 1 in the whole process, the purpose of breaking a closed magnetic circuit of the magnetic steel pipe is achieved, implementation conditions are created for a single three-phase cable to penetrate through the embedded steel pipe 1, the phenomenon that the closed magnetic circuit is formed when the single three-phase alternating current cable penetrates through the steel pipe 1 to generate eddy current is avoided, and the problems that the cable is heated and burnt and damaged are avoided.
The embodiment adopts the following specific implementation steps, and the basic flow is as shown in fig. 1:
A. according to the size of the embedded steel pipe 1, a chute 2 and a flat car 3 are prefabricated, a bracket 5 and an expansion rod 4 are arranged on the flat car 3, the bracket 5 is used for fixing a cutting device, and the expansion rod 4 is used for pushing the flat car 3 to move.
The sliding chute 2 can be made of two sections of angle steels, the two sections of angle steels are arranged oppositely, and the two sections of angle steels are welded together through at least two connecting plates in a transverse mode, so that the two sections of angle steels form a whole, and the novel steel frame is simple in structure, convenient and practical and low in cost. When one section of prefabricated spout 2 can't run through long pre-buried steel pipe 1 whole journey completely because the construction space restriction, can weld growth, the nimble construction to spout 2 in the work progress. The width of the sliding chute 2 is preferably the inner diameter 2/3 of the embedded steel pipe 1. The front end of the chute 2 is preferably provided with a limit plate 8 for limiting the flat car 3 and for reminding an operator in the outer space of the flat car 3 to reach a limit position in the chute 2. Wherein, the front end is the one end that spout 2 faced pre-buried steel pipe 1 depths, is relative with the operating end (rear end) that the technical staff was located.
The width of the flat car 3 is slightly smaller than the inner width of the chute 2, so that the flat car 3 can move along a given route in the chute 2. The flat car 3 is provided with 4 small wheels and a telescopic rod 4, and the outer edges of the small wheels and the outer edge of the flat car 3 are positioned on the same vertical plane; the head end of the telescopic rod 4 is welded with the flat car 3, and the tail end of the telescopic rod 4 is spliced by a screw opening and can be lengthened according to the required length.
B. Selecting a cable well corresponding to the end part of the embedded steel pipe 1 for construction; the sliding groove 2 is horizontally placed and extended into the embedded steel pipe 1, and the flat car 3 is placed in the sliding groove 2.
C. As shown in fig. 3, cutting the embedded steel pipe 1 by using a plasma cutting machine 9 (in the prior art, the plasma cutting machine is commonly used in a workshop for carrying out hot processing treatment on metal with the thickness of more than 0.3mm, such as cutting, fusion welding, brazing, quenching, spraying and the like): arranging a chassis 91 of a plasma cutting machine 9 and an air compressor 10 matched with the chassis in the external space of the embedded steel pipe 1, and supplying power to the embedded steel pipe by using a three-stage distribution box 11; fixing a plasma shooting gun 92 of a plasma cutting machine 9 on the bracket 5 in a manner of binding iron wires, and positioning a nozzle of the plasma shooting gun 92 towards the inner wall of the embedded steel pipe 1; the cable 93 connected to the plasma gun 92 is laid and led out along the chute 2.
D. Set up camera 6 on flatbed 3, the bracket 5 is placed in to the back, fixes portable power source 7 through the sticky tape ligature on telescopic link 4 and supplies power for camera 6. Adjust camera 6 in advance to with mobile phone bluetooth network connection, utilize 6 equipment of camera to provide visual interface, camera 6 conveys the cutting image in pre-buried steel pipe 1 to display terminal and shows, operating personnel's cell-phone end promptly makes things convenient for operating personnel to adjust work on next step according to the scene of cutting, guarantees cutting quality and construction safety.
E. And starting the plasma cutting machine 9, the air compressor 10 and the camera 6, and pushing the flat car 3 to move forwards at a constant speed at a slotting speed of 160-180 seconds/meter through the telescopic rod 4, so that the plasma shooting gun 92 cuts along the whole course of the inner wall of the embedded steel pipe 1. In the process of cutting the inner wall of the embedded steel pipe 1 by the plasma shooting gun 92, an operator pushes the flat car 3 to move forwards while cutting according to an image fed back by the camera 6, and the nozzle angle of the plasma shooting gun 92 is finely adjusted by left and right traction cutting devices, namely a cable 93, so that the plasma shooting gun can better adapt to the actual working condition, is flexibly constructed, and ensures the cutting quality and effect.
If the length of the prefabricated sliding groove 2 is not enough to support the flat car 3 to drive the plasma shooting gun 92 to cut through the whole embedded steel pipe 1 due to the narrow construction space of the cable well, after one prefabricated sliding groove 2 is placed into the embedded steel pipe 1, one sliding groove 2 is continuously welded at the tail end of the sliding groove 2 and is butted with the previous sliding groove 2 to form a continuous whole until the total length of the sliding groove 2 meets the requirement that the plasma shooting gun 92 can cut the whole embedded steel pipe 1.
As shown in fig. 8, when the flatbed 3 is pushed to advance by the telescopic rod 4 for cutting, along with the cutting process, the telescopic rod 4 is lengthened to adapt to the construction progress and the narrow construction environment; specifically, a front section of the telescopic rod 4 is connected with a rear section of the telescopic rod 4 through a sleeve part 41, and the telescopic rod 4 is in threaded connection with the sleeve part 41; wherein, the first section of telescopic rod 4 is welded with the tail end of the flat car 3.
F. As shown in fig. 5, after the embedded magnetic steel pipe is cut into horizontal slits 12 having substantially equal intervals, the plasma cutter 9, the air compressor 10, and the camera 6 are closed, the multi-stage telescopic rod 4 is detached section by section and the flat car 3 is pulled back, and the long-distance chute 2 is sawn off and taken out.
G. After the cutting is finished, the crater processing is carried out, the gap 12 is rechecked, the discontinuous cutting phenomenon does not occur, and the width of the cutting gap 12 is about 1 cm. The other pre-buried steel pipes 1 are sequentially processed by the processing method, and the slotting processing of 6 steel pipes at two positions is finished in one working day.
H. And after all the pre-buried steel pipes 1 are cut, penetrating and laying a single three-phase cable line in the pre-buried steel pipes 1.
The processing method for the cable line to penetrate through the embedded steel pipe 1 is characterized in that a complete set of slotting device formed by combining a camera 6, a sliding chute 2, a flat car 3 with a bracket 5 and an expansion link 4 and the like is used for construction; the sliding chute 2 extends into the embedded steel pipe 1 to provide a movable fixed platform for the flat car 3 in the sliding chute 2, the sliding chute 2 can be made to be proper in length according to local conditions for construction, and when the embedded steel pipe 1 is processed in a limited space, the sliding chute 2 can be welded and extended, and can also be sawn off and taken out for reuse; the telescopic rod 4 can also be prolonged and shortened according to the length of the embedded steel pipe 1 so as to flexibly adapt to narrow construction space. The processing method provided by the embodiment provides favorable conditions for the single cable line to pass through the embedded steel pipe 1, the construction is flexible and convenient, the construction efficiency is improved to a great extent, and the construction difficulty is greatly reduced.
It should be noted that when the sliding chute 2 is built in the circular embedded steel pipe 1, two sides of the sliding chute 2 abut against the inner wall of the embedded steel pipe 1 to form line contact, and a large friction force is generated between the sliding chute 2 and the embedded steel pipe 1 under the action of a large gravity of the sliding chute 2, so that the sliding chute 2 is relatively stable; and 2 weight of spout are far greater than 3 weight of flatbed, and flatbed 3 slides along 2 centers of spout basically, can not make spout 2 rock about in pre-buried steel pipe 1, and owing to there is constructor to assist in the mouth of pipe and stabilize spout 2 to adjust and control flatbed 3 through handheld telescopic link 4, can make flatbed 3 keep steady operation in spout 1.
Example 2
As shown in fig. 6 and 7, the bracket 5 includes a boss-shaped base 53, a bearing 51 and a cylindrical top cap 52, the base 53 is welded on the flat car 3, the bearing 51 is nested on the base 53, the top cap 52 covers the bearing 51 and is sleeved on the boss shaft of the base 53, and the top cap 52 is rotatable relative to the base 53; wherein, two opposite support ridges 54 are arranged at the waist of the top hat 52, and a hard iron wire is adopted to fix the plasma shooting gun 92. The adjustable bracket 5 can adjust the nozzle angle of the plasma machine, and the construction is flexible.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A processing method for a cable line to penetrate through an embedded steel pipe is characterized by comprising the following steps:
the method comprises the following steps: prefabricating a supporting platform and a transportation part according to the size of the embedded steel pipe (1);
step two: the supporting platform is horizontally placed in the embedded steel pipe (1), and the supporting platform penetrates through the whole section of the embedded steel pipe (1); placing the transportation part on the supporting platform, fixing a cutting device on the transportation part, and positioning a nozzle of the cutting device to face the inner wall of the embedded steel pipe (1);
step three: starting the cutting device, driving the cutting device to advance along the supporting platform by operating the conveying part, and cutting the cutting device along the whole inner wall of the embedded steel pipe (1) to form a through gap (12);
step four: and (3) enabling a cable line to penetrate through the cut embedded steel pipe (1).
2. The processing method for the cable line to pass through the embedded steel pipe is characterized in that the transportation part adopts a flat car (3) with rollers, the flat car (3) is provided with a telescopic rod (4), and the flat car (3) is pushed by manually holding the telescopic rod (4); or the transportation part adopts a remote control car, and the cutting speed and direction of the cutting device are controlled in a Bluetooth remote control mode.
3. The processing method for the cable line to pass through the embedded steel pipe is characterized in that in the second step, after the transportation part is placed on the supporting platform, a camera (6) is arranged on the transportation part, and the cutting image in the embedded steel pipe (1) is transmitted to a display terminal through the camera (6) to be displayed.
4. The processing method for the cable wire to pass through the embedded steel pipe as claimed in claim 3, wherein in the third step, in the process that the cutting device cuts the inner wall of the embedded steel pipe (1), the embedded steel pipe (1) is cut, an operator pushes the transportation component to move forward according to the image fed back by the camera (6), and the angle of the nozzle of the cutting device is adjusted by pulling the cable (93) of the cutting device left and right.
5. The processing method for the cable line to penetrate through the embedded steel pipe as claimed in claim 2, wherein the telescopic rod (4) is held by a hand to advance at a slotting speed of 160-180 seconds/meter.
6. The processing method for the cable line to pass through the embedded steel pipe is characterized in that in the third step, when the flat car (3) is pushed by the telescopic rod (4) to advance for cutting, the telescopic rod (4) is lengthened along with the cutting process; the lengthening method comprises the following steps: the first section of the telescopic rod (4) is connected with the second section of the telescopic rod (4) through a sleeve part (41), and the two sections of the telescopic rod (4) are in threaded connection with the sleeve part (41).
7. The processing method for the cable line to pass through the embedded steel pipe as claimed in claim 6, wherein the first section of the telescopic rod (4) is welded with the tail end of the flat car (3).
8. The processing method for the cable line to penetrate through the embedded steel pipe according to any one of claims 1 to 7, wherein a sliding groove (2) is adopted by the supporting platform, and in the second step, after a section of the prefabricated sliding groove (2) is placed into the embedded steel pipe (1), a section of the sliding groove (2) is continuously lengthened at the tail end of the sliding groove (2) to form a whole until the total length of the sliding groove (2) meets the requirement that the cutting device can cut the embedded steel pipe (1) in the whole process.
9. The processing method for the cable line to penetrate through the embedded steel pipe as claimed in claim 8, wherein the two adjacent sliding grooves (2) are connected in a butt welding mode.
10. The processing method for the cable line to pass through the embedded steel pipe according to any one of claims 1 to 7, wherein the cutting device adopts a plasma cutting machine (9).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110720720.5A CN113319412A (en) | 2021-06-28 | 2021-06-28 | Processing method for cable line to penetrate through pre-buried steel pipe |
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| CN202110720720.5A CN113319412A (en) | 2021-06-28 | 2021-06-28 | Processing method for cable line to penetrate through pre-buried steel pipe |
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| CN113319412A true CN113319412A (en) | 2021-08-31 |
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| CN202110720720.5A Pending CN113319412A (en) | 2021-06-28 | 2021-06-28 | Processing method for cable line to penetrate through pre-buried steel pipe |
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