CN110451343B - Constant tension control device for shore power cable transmission - Google Patents

Constant tension control device for shore power cable transmission Download PDF

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Publication number
CN110451343B
CN110451343B CN201910756710.XA CN201910756710A CN110451343B CN 110451343 B CN110451343 B CN 110451343B CN 201910756710 A CN201910756710 A CN 201910756710A CN 110451343 B CN110451343 B CN 110451343B
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CN
China
Prior art keywords
cable
tension
winding
winding motor
conveyor
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Active
Application number
CN201910756710.XA
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Chinese (zh)
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CN110451343A (en
Inventor
曹小华
张朝
蒋国忠
黄益斌
钱程
宋景祥
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Jiangsu Jianlong Electrical Co ltd
Wuhan University of Technology WUT
Original Assignee
Jiangsu Jianlong Electrical Co ltd
Wuhan University of Technology WUT
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Application filed by Jiangsu Jianlong Electrical Co ltd, Wuhan University of Technology WUT filed Critical Jiangsu Jianlong Electrical Co ltd
Priority to CN201910756710.XA priority Critical patent/CN110451343B/en
Publication of CN110451343A publication Critical patent/CN110451343A/en
Application granted granted Critical
Publication of CN110451343B publication Critical patent/CN110451343B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/40Applications of tension indicators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/34Handled filamentary material electric cords or electric power cables

Abstract

The invention relates to the technical field of cable transmission, and discloses a shore power cable transmission constant tension control device which comprises a winding drum, a winding motor, a frequency converter, an encoder, a controller, a cable conveyor, a first tension sensor and a second tension sensor, wherein the winding drum is arranged on the winding drum; the winding drum and the cable conveyer are sequentially arranged along the cable transmission direction, a cable to be transmitted is connected with the cable conveyer after being wound on the winding drum and is conveyed to a target device through the cable conveyer, the winding drum is in transmission connection with an output shaft of a winding motor, the encoder is installed on an output shaft of the winding motor, the first tension sensor and the second tension sensor are installed on the cable and are respectively located on two sides of the cable conveyer, the encoder is electrically connected with the frequency converter, the frequency converter is electrically connected with the winding motor, and the conveying motor of the cable conveyer, the frequency converter, the first tension sensor and the second tension sensor are respectively electrically connected with the controller. The invention has the technical effect of keeping the tension of the cable in a proper range during transmission.

Description

Constant tension control device for shore power cable transmission
Technical Field
The invention relates to the technical field of cable transmission, in particular to a shore power cable transmission constant tension control device.
Background
After a ship is landed, a ship power system is mainly powered by a port, the ship power system and an electric pile on the shore are connected by a cable manually in most cases, the cable is manually retracted when the ship leaves the port, the manual operation mode is time-consuming and labor-consuming, the cable can be seriously damaged, and potential safety hazards are caused. Therefore, a cable transportation device is generally used to transport the cable from the reel to a specified position of the ship. However, due to full load and no load of the ship, tide rise and tide fall, the position of the ship changes, so that excessive tension or looseness of the cable is caused, the service life of the cable and the reliability of the cable conveying device are influenced, and potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a shore power cable transmission constant tension control device, which solves the technical problems that the cable transmission process has large tension change, the cable service life is influenced and potential safety hazards exist in the prior art.
In order to achieve the technical purpose, the technical scheme of the invention provides a shore power cable transmission constant tension control device, which comprises a winding drum, a winding motor, a frequency converter, an encoder, a controller, a cable conveyor, a first tension sensor and a second tension sensor, wherein the winding drum is arranged on the winding drum;
the reel and cable conveyer sets gradually along cable transmission direction, wait to transmit the cable around locating behind the reel with cable conveyer connects, and pass through cable conveyer carries to purpose equipment department, the reel with winding motor's output shaft transmission is connected, the encoder install in on winding motor's the output shaft, first tension sensor with second tension sensor all install in on the cable, and be located respectively cable conveyer's both sides, the encoder with the converter electricity is connected, the converter with winding motor electricity is connected, cable conveyer's conveying motor the converter first tension sensor and second tension sensor respectively with the controller electricity is connected.
Compared with the prior art, the invention has the beneficial effects that: the invention drives the winding drum to rotate through the winding motor, and the cable on the winding drum is transmitted to the cable conveyor, and then the cable conveyor transmits the cable to target equipment, such as a ship. The controller receives detection data of the first tension sensor and the second tension sensor and controls the rotating speed and the rotating direction of the winding motor according to the detection data, so that the tension on the cable is kept in a proper range, and the service life of the cable is prolonged. According to the invention, the tension control of the cable is realized according to the double tension sensors, and the potential safety hazard during cable transmission is eliminated.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a shore power cable transmission constant tension control device provided by the invention;
fig. 2 is a circuit structure diagram of an embodiment of the shore power cable transmission constant tension control device provided by the invention;
fig. 3 is a schematic structural view of an embodiment of the fairlead member provided in the present invention.
Reference numerals:
11. the device comprises a controller, 12, a frequency converter, 21, a carrier roller, 22, a cable guide member, 221, a guide roller, 222, a bracket, 3, a winding motor, 4, a coupler, 5, a speed reducer, 6, a winding drum, 7, an encoder, 8, a cable conveyer, 81, a conveying motor, 91, a first tension sensor, 92, a second tension sensor, 10 and a touch screen.
Detailed Description
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
As shown in fig. 1 and fig. 2, embodiment 1 of the present invention provides a shore power cable transmission constant tension control device, which is hereinafter referred to as the present device, and includes a winding drum 6, a winding motor 3, a frequency converter 12, an encoder 7, a controller 11, a cable conveyor 8, a first tension sensor 91, and a second tension sensor 92;
the winding drum 6 and the cable conveyer 8 are sequentially arranged along the cable transmission direction, the cable to be transmitted is wound on the winding drum 6 and then is connected with the cable conveyer 8, and is conveyed to a target device through the cable conveyor 8, the winding drum 6 is in transmission connection with an output shaft of the winding motor 3, the encoder 7 is installed on the output shaft of the winding motor 3, the first tension sensor 91 and the second tension sensor 92 are installed on the cable, and are respectively positioned at two sides of the cable conveyer 8, the encoder 7 is electrically connected with the frequency converter 12, the frequency converter 12 is electrically connected to the winding motor 3, and the conveying motor 81 of the cable conveyor 8, the frequency converter 12, the first tension sensor 91, and the second tension sensor 92 are electrically connected to the controller 11, respectively.
The first tension sensor 91 and the second tension sensor 92 are respectively installed on the cables at both sides of the cable conveyor 8, and are respectively used for detecting the cable tension between the cable conveyor 8 and the reel 6 and the cable tension between the cable conveyor 8 and the destination device. The detection data detected by the first tension sensor 91 and the second tension sensor 92 are fed back to the controller 11, whether the detection data of the two tension sensors are in a set range or not is judged by the controller 11, if the detection data are not in the set range, the rotating speed of the winding motor 3 is adjusted by the frequency converter 12, the winding motor 3 is driven by the frequency converter 12, the forward rotation, the reverse rotation, the stop, the acceleration and the deceleration of the cable winding drum 6 and the forward rotation, the reverse rotation and the stop of the conveying motor 81 of the cable conveyor 8 are realized, and therefore the tension on the cable is controlled to be in the set range all the time. The encoder 7 is mounted on the output shaft of the winding motor 3 and is used for measuring the rotating speed of the winding motor 3 and feeding the measured data back to the frequency converter 12, so that the controller 11 can obtain the rotating state of the winding motor 3, and the accurate control of the winding motor 3 is realized.
Specifically, in this embodiment, the winding motor 3 is implemented by an ac asynchronous variable frequency motor. In this embodiment, the cable specifically refers to a shore power cable, and the shore power cable is used to connect a shore power source and a target device, for example, to connect the shore power source and a ship, so as to supply power to the ship.
The invention adopts the double tension sensors to detect the cable tension in real time, can accurately obtain the real-time state of the cable, and can perform adaptive adjustment on the rotating speed and the steering of the winding drum 6 and the cable conveyor 8 according to the cable tension, thereby stably controlling the cable tension in the cable transmission process, prolonging the service life of the cable and improving the operation reliability of the device.
Preferably, the winding drum 6 is a single-layer winding drum 6, and a single-layer cable is wound on the single-layer winding drum 6.
The embodiment adopts the single-layer winding drum 6, the single-layer winding drum 6 enables the cable winding and unwinding speed to be in a linear relation with the rotating speed of the winding motor 3, and meanwhile, the cable tension is in a linear relation with the torque of the winding motor 3, so that the control of the winding and unwinding speed of the cable and the tension acting on the cable are facilitated, and the control of the cable tension and the cable winding and unwinding speed is simpler.
Preferably, as shown in fig. 1, a guide device is further included, on which the cable between the drum 6 and the cable conveyor 8 is arranged.
The cable transmission is guided by the guiding device, the trend of the cable is controlled when the cable swings, the movement of the cable in the direction perpendicular to the cable transmission direction is compensated, and the influence of the movement of the cable in the direction perpendicular to the cable transmission direction on tension measurement is avoided. The guide device and the second tension sensor 92 jointly form a tension detection device in a cable moving state, and detection accuracy of the second tension sensor 92 is guaranteed.
Preferably, as shown in fig. 1, the guide device includes an idler 21, and the cable is wound on the idler 21 along a rolling direction of the idler 21.
The cable transmission is guided by the supporting rollers 21, and the movement of the cable in the direction perpendicular to the cable transmission direction is compensated, so that the influence of the movement of the cable in the direction perpendicular to the cable transmission direction on the tension measurement is avoided.
Preferably, as shown in fig. 1 and fig. 2, the guiding device further includes a cable guiding member 22, the cable guiding member 22 includes four guide rollers 221, four guide rollers 221 are sequentially connected to the first position, the four guide rollers 221 are all installed on the bracket 222, and the cable is sequentially wound around the two opposite guide rollers 221.
The guide cable member 22 is additionally arranged on the basis of the carrier roller 21, so that the guide effect is enhanced. The cable guiding member 22 comprises two pairs of opposite guide rollers 221, and the guide directions of the two pairs of guide rollers 221 are perpendicular to each other, so that the cables can be conveniently transmitted towards different directions, and the corresponding guide roller 221 can be selected for guide transmission according to the position of the destination equipment.
Preferably, the controller 11 is configured to:
judging whether the tension on the cable between the cable conveyor 8 and the target equipment is larger than a first upper limit value or not, and if so, controlling the winding motor 3 and the conveying motor 81 to rotate towards the direction of releasing the cable;
and judging whether the tension on the cable between the cable conveyor 8 and the target equipment is smaller than a first lower limit value or not, and if so, controlling the winding motor 3 and the conveying motor 81 to rotate towards the direction of tightening the cable.
If the tension measured by the second tension sensor 92 is excessive, the cable conveyor 8 and the winding drum 6 rotate forward simultaneously to release a part of the cable, and if the tension measured by the second tension sensor 92 is excessive, the cable conveyor 8 and the winding drum 6 rotate backward simultaneously to withdraw a part of the cable, so that the tension on the cable between the cable conveyor 8 and the target device is maintained between the first lower limit value and the first upper limit value. The above-described forward rotation and reverse rotation are relative concepts for distinguishing the rotation direction when releasing the cable and when tightening the cable.
Preferably, the controller 11 is configured to:
judging the rotation state of the winding motor 3;
when the winding motor 3 rotates towards the direction of releasing the cable, judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is greater than a second upper limit value or not, and if so, increasing the rotating speed of the winding motor 3; judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is smaller than a second lower limit value or not, and if so, reducing the rotating speed of the winding motor 3;
when the winding motor 3 rotates towards the direction of tightening the cable, judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is greater than a second upper limit value, and if so, reducing the rotating speed of the winding motor 3; judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is smaller than a second lower limit value or not, and if so, increasing the rotating speed of the winding motor 3;
when the winding motor 3 stops rotating, judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is larger than a second upper limit value or not, and if so, controlling the winding motor 3 to rotate towards the direction of releasing the cable; and judging whether the tension on the cable between the winding drum 6 and the cable conveyor 8 is smaller than a second lower limit value or not, and if so, controlling the winding motor 3 to rotate towards the direction of tightening the cable.
The cable unwinding state or the cable winding state of the winding drum 6 can be judged according to the rotation direction of the winding motor 3, and then the working state of the winding motor 3 is correspondingly adjusted according to the tension measured by the first tension sensor 91. During the cable unwinding process of the winding drum 6, if the tension measured by the first tension sensor 91 is too large, the rotating speed of the winding motor 3 is properly increased, and if the measured tension is too small, the rotating speed of the winding motor 3 is properly reduced; if the tension measured by the first tension sensor 91 is too large during the process of winding the cable on the winding drum 6, the rotating speed of the winding motor 3 is properly reduced, and if the measured tension is too small, the rotating speed of the winding motor 3 is properly increased. When the winding drum 6 is at rest, if the tension measured by the first tension sensor 91 is too large, the winding motor 3 is controlled to rotate to release part of the cable, and if the tension measured is too small, the winding motor 3 is controlled to rotate to withdraw part of the cable. It is ensured according to the above-described control procedure that the tension on the cable between the reel 6 and the cable conveyor 8 is maintained between a second lower limit and a second upper limit.
Specifically, if the cable is not connected to the destination device, the tension on the cable between the drum 6 and the cable conveyor 8 only needs to be controlled according to the detection result of the first tension sensor 91, and if the cable is connected to the destination device, the tension on the cables on both sides of the cable conveyor 8 needs to be controlled.
Preferably, as shown in fig. 1, an output shaft of the winding motor 3 is connected to a speed reducer 5 through a coupling 4, and the speed reducer 5 is connected to the winding drum 6.
The winding motor 3 is connected with the winding drum 6 through a coupling 4 and a speed reducer 5, so as to drive the winding drum 6 to rotate.
Preferably, the coupling 4 is a hysteresis coupling.
When the cable transmission fails, the hysteresis coupling can limit the torque acting on the cable drum 6 if the tension on the cable is too high, thereby ensuring that the cable is not damaged due to the too high tension on the cable.
Preferably, the controller 11 is a PLC controller.
And a PLC controller is adopted to realize the control of the winding motor 3. Specifically, as shown in fig. 2, in this embodiment, the PLC controller is electrically connected to the frequency converter 12 through an RS485 interface, the first tension sensor 91 and the second tension sensor 92 are electrically connected to an analog input interface of the PLC controller, respectively, and the conveying winding motor 3 of the cable conveyor 8 is electrically connected to the PLC controller.
Preferably, as shown in fig. 2, the device further comprises a touch screen 10.
The detection results of the first tension sensor 91 and the second tension sensor 92 are displayed through the touch screen 10. Specifically, the controller 11 is electrically connected to the touch screen 10 through a PROFINET interface.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.

Claims (9)

1. A shore power cable transmission constant tension control device is characterized by comprising a winding drum, a winding motor, a frequency converter, an encoder, a controller, a cable conveyor, a first tension sensor and a second tension sensor;
the winding drum and the cable conveyer are sequentially arranged along a cable transmission direction, a cable to be transmitted is wound on the winding drum and then is connected with the cable conveyer and is conveyed to a target device through the cable conveyer, the winding drum is in transmission connection with an output shaft of a winding motor, the encoder is installed on the output shaft of the winding motor, the first tension sensor and the second tension sensor are installed on the cable and are respectively positioned on two sides of the cable conveyer, the encoder is electrically connected with the frequency converter, the frequency converter is electrically connected with the winding motor, and the conveying motor, the frequency converter, the first tension sensor and the second tension sensor of the cable conveyer are respectively electrically connected with the controller;
the controller is configured to:
judging the rotation state of the winding motor;
when the winding motor rotates towards the direction of releasing the cable, judging whether the tension on the cable between the winding drum and the cable conveyor is greater than a second upper limit value or not, and if so, increasing the rotating speed of the winding motor; judging whether the tension on the cable between the winding drum and the cable conveyor is smaller than a second lower limit value or not, and if so, reducing the rotating speed of a winding motor;
when the winding motor rotates towards the direction of tightening the cable, judging whether the tension on the cable between the winding drum and the cable conveyor is greater than a second upper limit value or not, and if so, reducing the rotating speed of the winding motor; judging whether the tension on the cable between the winding drum and the cable conveyor is smaller than a second lower limit value or not, and if so, increasing the rotating speed of a winding motor;
when the winding motor stops rotating, judging whether the tension on the cable between the winding drum and the cable conveyor is larger than a second upper limit value or not, and if so, controlling the winding motor to rotate towards the direction of releasing the cable; and judging whether the tension on the cable between the winding drum and the cable conveyor is smaller than a second lower limit value or not, and if so, controlling the winding motor to rotate towards the direction of tightening the cable.
2. The shore power cable transport constant tension control device of claim 1, wherein said drum is a single layer drum on which a single layer of cable is wound.
3. The shore power cable transfer constant tension control device of claim 2, further comprising a guide on which the cable between said drum and said cable conveyor is disposed.
4. The shore power cable transport constant tension control device of claim 3, wherein said guide means comprises an idler around which said cable is wound in the rolling direction of said idler.
5. The shore power cable transmission constant tension control device according to claim 4, wherein the guide device further comprises a cable guide member, the cable guide member comprises four guide rollers, the four guide rollers are sequentially connected at the head, and the cable is sequentially wound around two opposite guide rollers.
6. The shore power cable transport constant tension control device of claim 1, wherein said controller is configured to:
judging whether the tension on the cable between the cable conveyor and the target equipment is greater than a first upper limit value or not, and if so, controlling the winding motor and the conveying motor to rotate towards the direction of releasing the cable;
and judging whether the tension on the cable between the cable conveyor and the target equipment is smaller than a first lower limit value or not, and if so, controlling the winding motor and the conveying motor to rotate towards the direction of tightening the cable.
7. The shore power cable transmission constant tension control device according to claim 1, wherein the output shaft of the winding motor is connected with a reducer through a coupling, and the reducer is connected with the winding drum.
8. The shore power cable transport constant tension control device of claim 7, wherein said coupling is a hysteresis coupling.
9. The shore power cable transport constant tension control device according to any of claims 1 to 8, wherein said controller is a PLC controller.
CN201910756710.XA 2019-08-16 2019-08-16 Constant tension control device for shore power cable transmission Active CN110451343B (en)

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Application Number Priority Date Filing Date Title
CN201910756710.XA CN110451343B (en) 2019-08-16 2019-08-16 Constant tension control device for shore power cable transmission

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CN110451343B true CN110451343B (en) 2021-03-16

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Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
CN111762634A (en) * 2020-06-03 2020-10-13 武汉理工大学 Shore power cable lifting and conveying device based on single-layer cable drum
CN111776871A (en) * 2020-08-17 2020-10-16 江苏鼎盛重工有限公司 Overwater cable transmission control system and method
CN111960196B (en) * 2020-10-21 2021-01-15 澄瑞电力科技(上海)有限公司 Floating ship-shore connection cable cooperative control system and method

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