CN116101835A - Device and system for threading an electric cable into a tubule attached to an electrically heated conduit - Google Patents
Device and system for threading an electric cable into a tubule attached to an electrically heated conduit Download PDFInfo
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- CN116101835A CN116101835A CN202111336480.5A CN202111336480A CN116101835A CN 116101835 A CN116101835 A CN 116101835A CN 202111336480 A CN202111336480 A CN 202111336480A CN 116101835 A CN116101835 A CN 116101835A
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- 210000005239 tubule Anatomy 0.000 title claims description 67
- 230000005540 biological transmission Effects 0.000 claims description 36
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 19
- 238000010438 heat treatment Methods 0.000 description 14
- 238000010276 construction Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 239000010779 crude oil Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000283690 Bos taurus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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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
- H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
- H02G3/02—Details
- H02G3/08—Distribution boxes; Connection or junction boxes
- H02G3/081—Bases, casings or covers
- H02G3/083—Inlets
- H02G3/085—Inlets including knock-out or tear-out sections
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
- B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
- B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
- B65H51/10—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements with opposed coacting surfaces, e.g. providing nips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H51/00—Forwarding filamentary material
- B65H51/32—Supporting or driving arrangements for forwarding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/34—Handled filamentary material electric cords or electric power cables
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- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention relates to a device and a system for penetrating a cable into a thin pipe attached to an electrically heated pipeline, which solve the problems of low efficiency, high threading difficulty and the like in the prior art. The system is composed of a plurality of threading devices, a plurality of pairs of pulleys, guide heads and the like. The effect is that: each threading equipment can be detached from the pipeline under the condition that the cable moves, is carried manually by a special knapsack assembly, is then mounted on the pipeline in front to wait for arrival of the cable, and forms a mode that a plurality of threading equipment are arranged along the pipeline in a multipoint mode and are threaded in a relay mode, so that the efficient and feasible threading purpose is achieved.
Description
Technical Field
The invention belongs to the field of penetration of cables into tubules, and particularly relates to equipment and a system for penetrating cables into tubules attached to an electrically heated pipeline.
Background
The oil field in inland area is far away from port or oil refinery, and the crude oil of oil field is transported to port or oil refinery by pipeline transportation method. Due to the long distance, the temperature of the crude oil can be reduced in the flowing process, the viscosity of the crude oil is increased, the fluidity of the crude oil is reduced, and the temperature of the crude oil needs to be increased. Typically, electrically heated oil delivery pipelines are used. And a heating cable is arranged on the outer arc surface of the oil pipeline, and is electrified to heat, and meanwhile, the pipeline, the heating cable and a tubule attached to the pipeline are required to be insulated. The heating cable penetrates into the tubule, the tubule is tightly attached to the oil pipeline, and the outermost layer is wrapped by the heat preservation layer.
One of the above-mentioned pipeline laying methods with a thick insulation layer is to process oil pipelines in sections in a factory; each section of oil pipeline is attached with a thin pipe for penetrating a heating cable, and then a heat preservation layer is generated in a factory through a foaming process. And then transporting each section of pipeline with the tubule and the heat preservation layer to the site for welding and installing the continuous oil pipeline with long distance. The two ends of each section of pipeline are provided with 200-300 mm of exposed oil pipeline, and an operation space is reserved for the on-site welding pipeline and the cable to penetrate into the tubule. After the oil delivery pipe is welded, the oil delivery pipe is continuous, but the heat insulation layer and the tubule penetrating through the heating cable are discontinuous. The length of the discontinuity is typically 2 times the 200-300 mm bare length described above, i.e., the bare length is 400-600 mm.
The heating cable is usually a single wire threaded into a thin tube attached to an oil pipeline. In a three-phase ac power supply system, the heating cable is typically three wires, and three tubules attached to the oil pipeline are separately disposed on the outer arc surface of the oil pipeline.
The traditional method for penetrating the heating cable into the tubule is completed manually. The construction method comprises the following steps: every interval a distance, the personnel are arranged at the intermittent position of the heat preservation layer and the tubule of 400-600 mm. All personnel equipped along the pipeline simultaneously push or pull the cable with force by password command. Or the pulling wire of the steel wire rope is threaded into the tubule by a manual method, then the steel wire rope and the cable wire are connected together, and the pulling wire is pulled back by a threading machine similar to a winch, so that the construction of the cable wire is completed. Along with the continuous jointless length lengthening of the heating cable, for example, more than 1 km, the manual cable threading becomes difficult (more personnel are needed, the line length is inconvenient to command, the construction cost is high, and the efficiency is low). By adopting a winch traction method, when the continuous heating cable without joints is long, the traction is not possible to succeed even under the condition that the bending positions of the pipelines are more. Because the friction force between the cable line with the length of more than 1 km and the inner wall of the slim pipe is large, the stress per unit area on the cable line is far more than the limit of the traction line specified in GB 50168-2018 on the tensile force per unit area of the cable line.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide a device and a system for penetrating a cable into a tubule attached to an electrically heated pipeline, wherein the threading device and the system related to the invention are different from the common device, construction method and technology for penetrating a power cable, an optical fiber and a communication line.
The technical aim of the invention is mainly solved by the following technical scheme: the device is characterized in that the device is threading equipment, the threading equipment is at least one group, each group of threading equipment comprises a base, motors which are detachably arranged on the base and are arranged in pairs, each motor is provided with a cable clamping transmission wheel, the two cable clamping transmission wheels are oppositely arranged and used for clamping cables and transmitting the cables, and the motors are provided with wireless switches which are used for receiving control signals and used for controlling the motors to start or stop.
The invention solves the problems by the following thought: the machine (threading equipment) is used for replacing a person, one threading equipment is placed in each interval by using an operation space of 400-600 mm on a pipeline, and a signal is sent to the wireless switch by using a wireless transmission controller of the switching value for controlling the starting or stopping of the motor, so that a plurality of threading equipment along the pipeline which is heated by electricity can be started simultaneously and stopped simultaneously. One point stress of the end of the cable in the traditional threading machine construction is dispersed to a plurality of points, so that the cable is not damaged in the construction process, and a plurality of cables can be simultaneously threaded (each cable cooperates with a plurality of threading devices, so that the cables can work simultaneously, and the working efficiency is greatly improved). Because the length of the cable wire which can be pushed in the thin tube is far smaller than the length of the cable wire which can be pulled, the threading is also required to be completed by adopting the mode of alternately moving relay of a plurality of threading devices.
The threading system provided by the invention is formed by combining a plurality of threading devices, wherein each tubule is matched with the plurality of threading devices and is quickly assembled and installed on site. The threading device is mounted on the electrically heated pipe before the cable line does not reach the current threading device. When the cable is clamped by a pair of cable clamping transmission wheels, the motor is started under the control of the switching value wireless receiver, a pulling force is formed on the cable at the outlet end of the tubule, and the cable is pulled out of the tubule; and pushing force is formed at the inlet section of the thin pipe, and the cable is pushed in from the inlet of the thin pipe. When the cable is pushed forward for a certain distance, the threading equipment which is installed in the front and is in a waiting state is used for relaying. The current threading equipment can be detached from the pipeline under the condition of moving the cable, and a single person can carry the transposition to the front relay. Because the resistance of pushing the cable wire in the tubule is far greater than the resistance of pulling the cable wire, the threading device should be in a pulled state to the cable wire as much as possible. The distance for pushing the cable is short, but the cable must be pushed to move in the tubule. The distance for pushing the cable to move in the tubule depends on the tension of the cable and the smoothness of the inner wall of the tubule.
For the convenience of clamping the cable, the wheel surface of the cable clamping transmission wheel is provided with a groove ring, the groove ring is arranged along the circumferential direction of the wheel surface, and the diameter of the indent of the groove ring is matched with the outer diameter of the cable to be transmitted.
In order to avoid cable slipping, the concave surface of the groove ring is provided with thread-shaped teeth or thread-shaped tooth grooves, the thread-shaped teeth or thread-shaped tooth grooves are perpendicular to the axis of the cable to be conveyed, and the thread-shaped teeth or thread-shaped tooth grooves are used for increasing friction force, so that two opposite cable clamping conveying wheels can clamp and convey the cable.
The two motors are connected through a hinge, the power supply of the motors is a mobile power supply, each group of threading equipment is provided with a carrying assembly, and the carrying assembly is used for carrying and moving the threading equipment. The hinge mode is connected, so that the angle of the two motors can be conveniently adjusted, the distance between the two cable clamping transmission wheels can be adjusted, and cables with different diameters can be conveniently clamped.
Each motor is provided with a supporting mechanism, the supporting mechanisms are used for supporting and detachably fixing the upper surface of the base, the base is a circular arc base, and the lower surface of the base is buckled on the outer circular arc surface of the heated pipeline.
Preferably, the base is provided with an inverted L-shaped stop block, the support mechanism is an L-shaped hook block, and the inverted L-shaped stop block is in hooking fit with the L-shaped hook block, so that the motor is detachably fixed on the base.
The base is matched with a binding rope (usually a steel wire rope), the binding rope is provided with a length adjusting mechanism, the binding rope is used for binding the base on an electrically heated pipeline, the adjusting mechanism is used for adjusting the curvature radius of the base and adjusting the gap between the opposite cable clamping and conveying wheels, namely, when the curvature radius of the base is small, the gap between the opposite cable clamping and conveying wheels on the two motors is large, and the clamping force on a cable is small; when the curvature radius of the base is large, the gap between the cable clamping transmission wheels on the two opposite motors is small, and the clamping force on the cable is large.
The system for penetrating the cable into the tubule attached to the electrically heated pipeline comprises the device for penetrating the cable into the tubule attached to the electrically heated pipeline, and further comprises a pulley pair detachably arranged at the entrance of the tubule, wherein the pulley pair is used for enabling the cable to smoothly pass through the entrance of the tubule.
The system for penetrating the cable wires into the tubules attached to the electrically heated pipeline further comprises a conical guide head, wherein the guide head is used for being fixed at the head of each cable wire, so that the cable wires can smoothly avoid the steps of the adjacent but dislocated tubule orifices when pushed into the tubules.
The system for penetrating the cable into the tubule attached to the heated pipeline further comprises a wireless switching value, a plurality of pairs of equipment are respectively fixed on the heated pipeline along the corresponding positions of the heated pipeline, and the motors at the positions can be controlled by the wireless switching value, so that the cable clamping transmission wheels at the positions can simultaneously pull or push the cable to move forwards or backwards.
The invention has the beneficial effects that: the mode of simulating manual threading wears to establish the cable conductor, improves threading efficiency greatly, avoids the long distance again to draw the production of huge frictional force that produces between cable conductor and the pipeline, can conveniently, the efficient wears to establish the cable conductor.
Drawings
Fig. 1 is a schematic view of a set of threading devices according to the present invention.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings.
Examples: as shown in fig. 1, the cable is threaded into a tubule attached to an electrically heated pipe, the apparatus is a threading apparatus, the threading apparatus includes at least one group, each group of threading apparatus includes a base 7, a pair of motors (typically, low-rotation-speed high-torque motors 1) detachably provided on the base, each motor is provided with a cable clamping transmission wheel 2, two cable clamping transmission wheels are provided opposite to each other for clamping the cable and transmitting the cable, and the motors are provided with wireless switches for receiving control signals for controlling the motors to start or stop.
The invention solves the problems by the following thought: the machine (threading equipment) is used for replacing a person, one threading equipment is placed in each interval by using an operation space of 400-600 mm on a pipeline, and a signal is sent to the wireless switch by using a wireless transmission controller of the switching value for controlling the starting or stopping of the motor, so that a plurality of threading equipment along the pipeline which is heated by electricity can be started simultaneously and stopped simultaneously. One point stress of the end of the cable in the traditional threading machine construction is dispersed to a plurality of points, so that the cable is not damaged in the construction process, and a plurality of cables can be simultaneously threaded (each cable cooperates with a plurality of threading devices, so that the cables can work simultaneously, and the working efficiency is greatly improved). Because the length of the cable wire which can be pushed in the thin tube is far smaller than the length of the cable wire which can be pulled, the threading is also required to be completed by adopting the mode of alternately moving relay of a plurality of threading devices.
The threading system provided by the invention is formed by combining a plurality of threading devices, wherein each tubule is matched with the plurality of threading devices and is quickly assembled and installed on site. The threading device is mounted on the electrically heated pipe before the cable line does not reach the current threading device. When the cable is clamped by a pair of cable clamping transmission wheels, the motor is started under the control of the switching value wireless receiver, a pulling force is formed on the cable at the outlet end of the tubule, and the cable is pulled out of the tubule; and pushing force is formed at the inlet section of the thin pipe, and the cable is pushed in from the inlet of the thin pipe. When the cable is pushed forward for a certain distance, the threading equipment which is installed in the front and is in a waiting state is used for relaying. The current threading equipment can be detached from the pipeline under the condition of moving the cable, and a single person can carry the transposition to the front relay. Because the resistance of pushing the cable wire in the tubule is far greater than the resistance of pulling the cable wire, the threading device should be in a pulled state to the cable wire as much as possible. The distance for pushing the cable is short, but the cable must be pushed to move in the tubule. The distance for pushing the cable to move in the tubule depends on the tension of the cable and the smoothness of the inner wall of the tubule.
For the convenience of clamping the cable, the wheel surface of the cable clamping transmission wheel is provided with a groove ring 21, the groove ring is arranged along the circumferential direction of the wheel surface, and the diameter of the concave of the groove ring is matched with the outer diameter of the cable to be transmitted.
In order to avoid cable slipping, the concave surface of the groove ring is provided with thread-shaped teeth or thread-shaped tooth grooves, the thread-shaped teeth or thread-shaped tooth grooves are perpendicular to the axis of the cable to be conveyed, and the thread-shaped teeth or thread-shaped tooth grooves are used for increasing friction force, so that two opposite cable clamping conveying wheels can clamp and convey the cable.
The two motors are connected through a hinge 3, the power supply of the motors is a mobile power supply, a power supply socket 8 is arranged on each motor, the power supply socket 8 is used for being connected with the mobile power supply, each group of threading equipment is provided with a carrying assembly, and the carrying assembly is used for carrying and moving the threading equipment. The hinge mode is connected, so that the angle of the two motors can be conveniently adjusted, the distance between the two cable clamping transmission wheels can be adjusted, and cables with different diameters can be conveniently clamped.
Each motor is provided with a supporting mechanism 4, the supporting mechanism is used for supporting and detachably fixing the upper surface of the base, the base is a circular arc base, and the lower surface of the base is buckled on the outer circular arc surface of the heated pipeline.
Preferably, the base 7 is provided with an inverted L-shaped stop 5, and the support mechanism is an L-shaped hook block, and the inverted L-shaped stop is engaged with the L-shaped hook block in a hooking manner, so that the motor is detachably fixed on the base. The inverted L-shaped stoppers 5 may be arranged in pairs along the cambered surface of the base 7, each pair of the inverted L-shaped stoppers 5 standing on a pair of motors and cable-holding power transmission wheels thereof. They are arranged separately on the arc surface, and ensure that the adjacent pair of motors and the cable clamping transmission wheels thereof do not interfere with each other, and the moving cable wires do not interfere with the adjacent pair of motors and the cable clamping transmission wheels and the supporting legs thereof.
The base is matched with a binding rope 6 (usually a steel wire rope), a length adjusting mechanism is arranged on the binding rope (a screw is usually arranged on the steel wire rope and used for adjusting the length of the steel wire rope), the binding rope is used for binding the base on an electrically heated pipeline, the adjusting mechanism is used for adjusting the curvature radius of the base and adjusting the gap between the opposite cable clamping transmission wheels, namely, when the curvature radius of the base is small, the gap between the opposite cable clamping transmission wheels on the two motors is large, and the clamping force on a cable is small; when the curvature radius of the base is large, the gap between the cable clamping transmission wheels on the two opposite motors is small, and the clamping force on the cable is large.
The system for penetrating the cable into the tubule attached to the electrically heated pipeline comprises the device for penetrating the cable into the tubule attached to the electrically heated pipeline, and further comprises a pulley pair detachably arranged at the entrance of the tubule, wherein the pulley pair is used for enabling the cable to smoothly pass through the entrance of the tubule.
The system for penetrating the cable wires into the tubules attached to the electrically heated pipeline further comprises a conical guide head, wherein the guide head is used for being fixed at the head of each cable wire, so that the cable wires can smoothly avoid the steps of the adjacent but dislocated tubule orifices when pushed into the tubules.
The system for penetrating the cable into the tubule attached to the heated pipeline further comprises a wireless switching value, a plurality of pairs of equipment are respectively fixed on the heated pipeline along the corresponding positions of the heated pipeline, and the motors at the positions can be controlled by the wireless switching value, so that the cable clamping transmission wheels at the positions can simultaneously pull or push the cable to move forwards or backwards.
In the scheme, the threading equipment is bound on a thick pipeline needing electric heating by using a steel wire rope, and a cable wire is threaded into a thin pipe attached to the pipeline needing electric heating.
The threading device can be detached from the thick heated pipeline during the movement of the cable; the wireless switch is used for receiving control signals through the controller and controlling the motor to start or stop, so that the pairs of motors and the cable clamping transmission wheels thereof can be remotely controlled in a wireless manner, and each threading device can work simultaneously according to instructions. The inlet of each thin tube is provided with a pulley device; the end of each cable is provided with a guide head.
The device and the system can push the heating cable into the tubule and pull the cable out of the tubule.
The cable threading system simulates manual threading, and completes the heating cable threading construction in a way of relaying a plurality of threading devices on a pipeline section by section.
The inverted "L-shaped" stops 5 may be arranged in pairs along the arcuate surface of the base 7, each pair of L-shaped stops having a pair of motors standing thereon and their cables gripping the drive wheel. The inverted L-shaped stop blocks 5 are arranged on the arc surface separately, and ensure that the adjacent pair of motors and the cable clamping transmission wheels thereof do not interfere with each other, and the moving cable lines do not interfere with the adjacent pair of motors and the cable clamping transmission wheels and the supporting legs thereof.
When the current threading device pushes the cable to the next relay threading device, the cable is clamped by the relay cable clamping transmission wheel 2, the cable is pulled on one side, the end of the cable is pushed into the tubule on the other side, the current threading device can be removed under the state that the cable moves, and the current threading device is carried to the next relay point and is installed on the pipeline to wait for the arrival of the cable.
Two or more threading devices as in fig. 1 may be provided depending on the length and weight of the cable to be threaded.
The distance between the two relay points is the length of the cable wire pushing-in thin tube by the threading equipment. According to the weight of the cable, the resistance of the cable and the inner wall of the tubule in the pushing state determines the distance between the two relay points.
Because the tubule with the heat preservation attached to the electrically heated pipeline is discontinuous, the two ends of each section of tubule are respectively an outlet end for pulling out the cable and an inlet end for pushing in the cable. Because the cable is coiled and transported on the wire drum, the tension of the cable forms a small curvature radius, and the pipeline which is electrically heated is roughly linear, a pulley which centers the cable needs to be arranged at the inlet end of the thin pipe, the end of the cable is prevented from being abutted against the heat insulation layer or being blocked at the inlet, and the thin wall of the thin pipe is prevented from cutting the outer layer of the cable.
Because the tubule attached to the pipeline heated by electricity is spliced in sections, the joint can generate steps due to dislocation, and the steps are hidden in the heat insulation layer, when the end part of the cable is abutted against the steps, the cable is easy to be prevented from being pushed. Therefore, the conical guide head needs to be connected with the head end of the cable wire, so that the cable wire head can smoothly pass through the interface of the tubule when pushed, and the cable wire head is prevented from being blocked by steps.
As shown in fig. 1, the pair of threading devices are disposed horizontally, but may be disposed vertically in practical applications. The motor is positioned horizontally or vertically according to the diameter of the heated pipeline and the spacing between the heating cables.
The technical scheme is exemplified as follows:
a long-distance petroleum conveying pipeline (pipeline for short) project is longer than 1000 km, the diameter of the petroleum conveying pipeline is 600 mm, and square aluminum pipes with the size of 35 mm x30 mm are attached to the petroleum conveying pipeline. The thickness of the heat insulation layer is 90 mm, the spacing distance of the three square aluminum pipes in the circumferential arc direction of the pipeline is 150 mm, and each aluminum pipe is penetrated with a heating cable. The cable weighs 640 kg per kilometer. Tests show that under the condition that the thin pipe is straight, the static friction force of a cable wire with the length of 200 meters in the square aluminum pipe is 509 newtons. If the length of the continuous cable (without intermediate joint) is required to be not less than 1200 meters. The static friction of a cable of 1200 meters in a straight aluminum tube is 3054 newtons. By adopting manual threading, one person stands every 50 meters, 24 persons are needed, and 160 cattle are needed to be used in the left-right direction after the single arm of each person straightens (the thin pipe is arranged at the top of the pipeline and the person stands at the edge of the oil pipeline). According to the previous construction experience measurement and calculation, one cable can be penetrated every two hours. The technical scheme that the wire rope is drawn by a threading machine like a winch fails and cannot be used because the stress of the end of the cable is far more than the limit of the traction wire specified in GB 50168-2018 on the tensile force of the unit area of the cable. If the manual threading is adopted, the labor cost of the threading construction is high, and the cable line is too long, so that the sight is difficult to achieve, and the number is difficult to unify. The device and the system are adopted to carry out alternate relay threading by using six sets of threading devices, wherein five sets of threading devices are always arranged on an oil pipeline at intervals of 54 meters to carry out threading operation, and one set of threading device is always in the process of being detached from the oil pipeline, manually carried and walked and installed on the oil pipeline. The motor is controlled by adopting the wireless transmission switch control quantity, so that six sets of threading equipment can be started up to forward and reverse simultaneously and stop. The distance of the cable pushing in the square aluminum tube is limited to 54 meters. The motor is powered by a lithium battery pack, and the moving speed of the cable is 13 m/min. The three-1200-meter threading engineering can be completed by 8 persons in two hours, and the efficiency is 9 times of that of manual threading.
As shown in fig. 1, a threading device capable of threading 3 cables simultaneously, three cables 9 simultaneously, was shown, and the working width (pipe axis direction) of the threading device was 260 mm. The maximum pulling force or pushing force of each pair of cable clamping transmission wheels is 510 newtons, and when the resistance of the cable exceeds 540 newtons, the cable starts to slip on the cable clamping transmission wheels, but the cable cannot be damaged on the outer surface of the cable. Once slip is found, it may be that the cable is stuck in a certain position, and the threading inspection needs to be stopped, so that the stuck point is eliminated.
At the 90 degree turn of the heated pipe, there is also a need for a pair of pulleys fixed at the turn. Such paired pulleys, which must be installed already before the cable reaches, are also easily separated from the cable and removed from the pipe once threading is completed.
In actual construction, because the bending sites are more, one set of threading equipment needs to be fixed at the 90-degree bending pipe, and the threading equipment does not participate in the mutual alternate relay threading of a plurality of threading equipment. The same requirement is that the threading devices fixed at the bent pipe have both pulling force and pushing force on the cable line, and that the cable clamping transmission wheel for clamping the cable line can be separated from the cable line after the threading construction is completed, and the threading devices can be detached from the pipeline. The threading equipment which consists of three pairs of cable clamping transmission wheels and can simultaneously thread three cables is powered by a 24v lithium battery, and the lithium battery, a controller and a wireless switch of switching value are provided with a special back tool, so that a single person can conveniently carry the battery, the controller, the wireless switch, the three pairs of motors, the cable clamping transmission wheels and a base with three steel wire ropes.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention. In the above-described embodiments, the present invention is susceptible to various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The device is characterized in that the device is threading equipment, the threading equipment is at least one group, each group of threading equipment comprises a base, motors which are detachably arranged on the base and are arranged in pairs, each motor is provided with a cable clamping transmission wheel, the two cable clamping transmission wheels are oppositely arranged and used for clamping cables and transmitting the cables, and the motors are provided with wireless switches which are used for receiving control signals and used for controlling the motors to start or stop.
2. The apparatus for threading an electrical cable into a tubule attached to an electrically heated conduit of claim 1, wherein: the cable clamping transmission wheel is characterized in that a groove ring is arranged on the wheel surface of the cable clamping transmission wheel, the groove ring is arranged along the circumferential direction of the wheel surface, and the diameter of the inner recess of the groove ring is matched with the outer diameter of a cable to be transmitted.
3. The apparatus for threading a cable into a tubule attached to an electrically heated conduit of claim 2, wherein the concave surface of the grooved ring has a thread-like tooth or thread-like tooth slot perpendicular to the axis of the cable to be conveyed, the thread-like tooth or thread-like tooth slot being adapted to increase friction to enable two opposing cable-gripping power wheels to grip and convey the cable.
4. A device for threading an electric cable into a tubule attached to an electrically heated conduit as claimed in any one of claims 1 to 3 wherein the two motors are connected by a hinge, the power supply to the motors being a mobile power supply, and a carrying assembly is provided on each set of threading devices, the carrying assembly being adapted to carry the threading devices.
5. A device for threading an electric cable into a tubule attached to an electrically heated conduit as claimed in any one of claims 1 to 3 wherein a support means is provided on each motor for supporting and releasably securing to the upper surface of the base, the base being a circular arc base, the lower surface of the base being a snap fit over the outer circular arc surface of the heated conduit.
6. The apparatus for threading an electrical cable into a tubule attached to an electrically heated conduit of claim 5, wherein the base is provided with an inverted "L" shaped stop, and the support means is an L shaped hook block, the inverted "L" stop engaging the L shaped hook block to removably secure the motor to the base.
7. The apparatus for threading an electric cable into a tubule attached to an electrically heated conduit of claim 5, wherein the base is fitted with a binding rope having a length adjusting mechanism for binding the base to the electrically heated conduit, the adjusting mechanism being for adjusting the radius of curvature of the base for adjusting the gap between the opposing cable-gripping and transporting wheels, i.e., when the radius of curvature of the base is small, the gap between the opposing cable-gripping and transporting wheels on the motors is large and the holding force on the electric cable is small; when the curvature radius of the base is large, the gap between the cable clamping transmission wheels on the two opposite motors is small, and the clamping force on the cable is large.
8. A system for threading an electrical cable into a tubule attached to an electrically heated conduit, comprising an apparatus for threading an electrical cable into a tubule attached to an electrically heated conduit as in any one of claims 1-7, and further comprising a pair of removably disposed pulleys for positioning at the entrance of the tubule for enabling the electrical cable to pass smoothly through the entrance of the tubule.
9. The system for threading an electrical cable into a tubule attached to an electrically heated conduit of claim 8, further comprising a tapered guide head for securing to the head of each cable so that the cable can smoothly avoid the steps of adjacent but dislocated tubule orifices as it is pushed into the tubule.
10. The system of claim 9, further comprising a wireless switch, wherein the plurality of pairs of devices are disposed on the heated pipe along corresponding positions of the heated pipe, the motors being controllable by the wireless switch such that the cable grip pulley in the plurality of positions simultaneously pulls or pushes the cable in the forward or reverse direction.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336480.5A CN116101835A (en) | 2021-11-09 | 2021-11-09 | Device and system for threading an electric cable into a tubule attached to an electrically heated conduit |
| PCT/CN2022/130300 WO2023083135A1 (en) | 2021-11-09 | 2022-11-07 | Device and system for threading cable into slim tube attached to electrically heated pipeline |
| GB2316864.4A GB2620888A (en) | 2021-11-09 | 2022-11-07 | Device and system for threading cable into slim tube attached to electrically heated pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111336480.5A CN116101835A (en) | 2021-11-09 | 2021-11-09 | Device and system for threading an electric cable into a tubule attached to an electrically heated conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116101835A true CN116101835A (en) | 2023-05-12 |
Family
ID=86266128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111336480.5A Pending CN116101835A (en) | 2021-11-09 | 2021-11-09 | Device and system for threading an electric cable into a tubule attached to an electrically heated conduit |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN116101835A (en) |
| GB (1) | GB2620888A (en) |
| WO (1) | WO2023083135A1 (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4669705A (en) * | 1984-09-07 | 1987-06-02 | Langston Ralph C | Apparatus for pulling long runs of fiber optic cable |
| FR2774777B1 (en) * | 1997-12-26 | 2001-10-05 | France Telecom | PORTABLE PUSHING AND PULLING APPARATUS FOR LAYING CABLE IN A DUCT |
| CN209344647U (en) * | 2019-01-25 | 2019-09-03 | 中电建十一局工程有限公司 | A kind of secretly effective constructing device of deposited cable joint-box protection |
| CN111332860A (en) * | 2020-03-13 | 2020-06-26 | 国网山东省电力公司桓台县供电公司 | Power cable pay-off |
| CN111769483A (en) * | 2020-07-28 | 2020-10-13 | 河北荣威电力工程有限公司 | Cable laying device for electric power engineering construction and using method |
| CN213302626U (en) * | 2020-10-28 | 2021-05-28 | 青岛安装建设股份有限公司 | Threading device for pipeline optical cable engineering |
| CN216272381U (en) * | 2021-11-09 | 2022-04-12 | 浙江大铭新材料股份有限公司 | Apparatus and system for threading cable into tubules attached to electrically heated conduit |
-
2021
- 2021-11-09 CN CN202111336480.5A patent/CN116101835A/en active Pending
-
2022
- 2022-11-07 WO PCT/CN2022/130300 patent/WO2023083135A1/en active Application Filing
- 2022-11-07 GB GB2316864.4A patent/GB2620888A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023083135A1 (en) | 2023-05-19 |
| GB202316864D0 (en) | 2023-12-20 |
| GB2620888A (en) | 2024-01-24 |
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Inventor after: Zou Shoubao Inventor after: Yuan Jianbo Inventor after: Pan Bingfeng Inventor before: Zou Shoubao Inventor before: Yuan Jianbo Inventor before: Pan Bingfeng |