CN114374182A - Sag adjusting device for power overhead cable - Google Patents
Sag adjusting device for power overhead cable Download PDFInfo
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- CN114374182A CN114374182A CN202210042817.XA CN202210042817A CN114374182A CN 114374182 A CN114374182 A CN 114374182A CN 202210042817 A CN202210042817 A CN 202210042817A CN 114374182 A CN114374182 A CN 114374182A
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- swing arm
- sag
- motor
- screw rod
- cable
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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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/02—Devices for adjusting or maintaining mechanical tension, e.g. take-up device
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- Electric Cable Installation (AREA)
Abstract
Electric power overhead cable sag adjusting device relates to the power cable field. The invention aims to solve the problems that the prior art can only detect the sag, cannot process the sag in time and further increases the accident probability. The power output shaft of the motor is coaxially connected with one end of a screw rod, the screw rod is in threaded connection with a nut, one end of an upper swing arm and one end of a lower swing arm are hinged with each other, the other end of the upper swing arm is hinged with a motor shell, the other end of the lower swing arm is hinged with the outer circumferential surface of the nut, the upper swing arm, the lower swing arm and the screw rod are located on the same plane, an electromagnetic energy taking coil of a high-voltage cable induction electricity taking device is fixed at one end of the upper swing arm, a control part collects sag in real time through a sag monitoring device, the collected sag is compared with a standard threshold range, and when the collected sag is larger than the upper limit of the standard threshold range, the motor is driven to rotate forwards, otherwise, the motor is driven to rotate backwards.
Description
Technical Field
The invention belongs to the field of power cables, and particularly relates to sag adjustment of an overhead cable.
Background
Generally, when the transmission distance is long, a slight sag is formed due to the weight of the conductor, so that the conductor takes the shape of a catenary. This is because the straightening of a wire requires infinite force, which is practically nonexistent and also burdens the tower, and therefore the cable usually needs to be sagged within a controllable range. The sag is the vertical distance between the lowest point of the wire and a connecting line between two suspension points on the flat ground when the suspension heights of the wires on two adjacent base electric poles are the same.
The sag of the power transmission line is a main index of safe operation of the line, and the safe operation of the line can be influenced by too large or too small sag. When the sag is too large, the safety distance of the lead to the ground cannot be ensured, and once the lead blows by strong wind or ground equipment passes through, short-circuit accidents can be caused; when the sag is too small, the stress borne by the lead is too large, and when the temperature is too low in winter, the line shrinks or the line freezes to increase the weight, so that the line breaking accident can be caused.
In conclusion, the sag of the power transmission line has a great influence on the safety of the power transmission line. The device that has many sag detections among the prior art judges whether the sag has too big or undersize problem, then sends the testing result to the staff, and is handled by the staff again. However, because the worker needs a certain time to get ready to arrive at the site, the time is left unattended, and the accident probability is greatly increased.
Disclosure of Invention
The invention provides a power overhead cable sag adjusting device, aiming at solving the problems that in the prior art, sag can only be detected, and the sag cannot be processed in time, so that the accident probability is increased.
The sag adjustment device of the power overhead cable comprises a sag monitoring device, a power supply of the sag monitoring device is a high-voltage cable induction electricity taking device,
further comprising: an upper swing arm 2, a lower swing arm 3, a motor 4, a screw 6, a nut 7 and a control part,
the power output shaft of the motor 4 is coaxially connected with one end of the screw rod 6, the screw rod 6 is in threaded connection with the nut 7, one end of the upper swing arm 2 is hinged with one end of the lower swing arm 3, the other end of the upper swing arm 2 is hinged with the shell of the motor 4, the other end of the lower swing arm 3 is hinged with the outer circumferential surface of the nut 7, the upper swing arm 2, the lower swing arm 3 and the screw rod 6 are positioned on the same plane,
an electromagnetic energy taking coil 1 of the high-voltage cable induction electricity taking device is fixed at one end of an upper swing arm 2, the middle shaft of the electromagnetic energy taking coil 1 is vertical to the plane formed by the upper swing arm 2, a lower swing arm 3 and a screw 6,
the control part comprises a standard threshold range of the sag and a unit realized by the following software:
a sag monitoring device is used for acquiring sag units in real time,
a unit for comparing the acquired sag with a standard threshold range,
when the acquired sag is larger than the upper limit of the standard threshold range, the motor 4 is driven to rotate forwards,
when the acquired sag is smaller than the lower limit of the standard threshold range, the motor 4 is driven to rotate reversely,
a unit for driving the motor 4 to stop rotating when the collected sag belongs to the standard threshold range,
when motor 4 corotation, screw rod 6 corotation, and then drive nut 7 and remove to screw rod 6 top, go up the pin joint of swing arm 2 and lower swing arm 3 and remove to the direction of keeping away from screw rod 6, when motor 4 reversal, screw rod 6 reversal, and then drive nut 7 and remove to screw rod 6 bottom, go up the pin joint of swing arm 2 and lower swing arm 3 and remove to the direction that is close to screw rod 6.
Further, the power overhead cable sag adjusting device further comprises a fixed connecting piece 5, and the fixed connecting piece 5 is used for fixedly connecting a power output shaft of the motor 4 with the screw 6.
Further, above-mentioned electric power overhead cable sag adjusting device still includes nut stopper 8, and nut stopper 8 is fixed in 6 bottoms of screw rod.
Further, above-mentioned aerial cable sag adjusting device of electric power still includes swing arm stopper 9, and swing arm stopper 9 is fixed on nut 7, and swing arm stopper 9 is used for blockking down swing arm 3 to the slope of 6 directions of screw rod.
Further, the sag adjustment device for the power overhead cable further comprises a support 10, and the support 10 is used for supporting the sag adjustment device for the power overhead cable.
Further, the support 10 is a straight rod, and the bottom end of the screw 6 is connected with the top of the straight rod through a bearing.
Further, the support 10 comprises an upper support rod 10-1 and a lower support rod 10-2, the upper support rod 10-1 and the lower support rod 10-2 are both L-shaped, one end of the upper support rod 10-1 is fixedly connected with the motor 4, and one end of the lower support rod 10-2 is connected with the bottom end of the screw rod 6 through a bearing.
The sag adjusting device for the overhead power cable utilizes the electromagnetic energy taking coil in the high-voltage cable induction power taking device as a supporting piece of the cable, so that the electromagnetic energy taking coil not only has the function of taking electricity, but also can be used for adjusting the tension and height of the cable, and the sag is adjusted. Meanwhile, the sag adjusting device for the overhead power cable can process the sag problems when detecting the sag problems, ensure the speed and the energy efficiency and reduce the risk of faults.
Drawings
Fig. 1 is a schematic structural view of a nut of an electric overhead cable sag adjustment device in a lowest position;
FIG. 2 is a schematic structural diagram of the sag adjustment device for the overhead power cable with a nut located at the middle of a threaded rod;
FIG. 3 is a left side view nut of FIG. 2;
FIG. 4 is a top view of the nut;
FIG. 5 is a schematic view of the bracket supporting the sag adjustment device for an electrical overhead cable when the bracket is a straight rod;
fig. 6 is a schematic view of the power overhead cable sag adjustment device supported by the bracket when the bracket is an "L" shaped bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The first embodiment is as follows: the sag adjustment device for the overhead power cable according to the embodiment is specifically described with reference to fig. 1 to 4, and includes a sag monitoring device, an upper swing arm 2, a lower swing arm 3, a motor 4, a fixed connecting piece 5, a screw 6, a nut 7, a nut stopper 8, a swing arm stopper 9, and a control part.
The sag monitoring device adopts the grating optical fiber strain sensor arranged on the measured cable and is used for collecting the strain force of the cable. And training a neural network model by using the historically acquired cable strain force and the corresponding sag value, and then obtaining the sag value by using the trained neural network model. The power supply in the sag monitoring device is a high-voltage cable induction electricity taking device.
Specifically, the main structure of the sag adjustment device for the overhead power cable in the embodiment is as follows:
the power output shaft of the motor 4 is coaxially connected with one end of a screw rod 6 through a fixed connecting piece 5, the screw rod 6 is in threaded connection with a nut 7, one end of an upper swing arm 2 and one end of a lower swing arm 3 are hinged to each other, the other end of the upper swing arm 2 is hinged to a shell of the motor 4, the other end of the lower swing arm 3 is hinged to the outer circumferential surface of the nut 7, and the upper swing arm 2, the lower swing arm 3 and the screw rod 6 are located on the same plane.
An electromagnetic energy taking coil 1 of the high-voltage cable induction electricity taking device is fixed at one end of an upper swing arm 2, and a middle shaft of the electromagnetic energy taking coil 1 is perpendicular to a plane formed by the upper swing arm 2, a lower swing arm 3 and a screw 6.
The nut limiting block 8 is fixed at the bottom of the screw rod 6, and the nut 7 is prevented from falling off from the bottom end of the screw rod 6.
The swing arm limiting block 9 is fixed on the nut 7, and the swing arm limiting block 9 is used for preventing the lower swing arm 3 from inclining towards the screw 6.
The control part comprises a standard threshold range of the sag and a unit realized by the following software:
a sag monitoring device is used for acquiring sag units in real time,
a unit for comparing the acquired sag with a standard threshold range,
when the acquired sag is larger than the upper limit of the standard threshold range, the motor 4 is driven to rotate forwards,
when the acquired sag is smaller than the lower limit of the standard threshold range, the motor 4 is driven to rotate reversely,
a unit for driving the motor 4 to stop rotating when the collected sag belongs to the standard threshold range,
when motor 4 corotation, screw rod 6 corotation, and then drive nut 7 and remove to screw rod 6 top, go up the pin joint of swing arm 2 and lower swing arm 3 and remove to the direction of keeping away from screw rod 6, when motor 4 reversal, screw rod 6 reversal, and then drive nut 7 and remove to screw rod 6 bottom, go up the pin joint of swing arm 2 and lower swing arm 3 and remove to the direction that is close to screw rod 6.
The working principle of the embodiment is as follows:
in the embodiment, the cable penetrates through the electromagnetic energy taking coil 1, and the electricity is taken by utilizing the high-voltage cable induction electricity taking principle to supply power to the sag monitoring device. When the sag monitoring device finds that the sag exceeds the upper limit of the standard threshold range, the sag is over large, and the cable sags. At this time, the driving motor 4 rotates forward, and the screw 6 rotates, and the nut 7 is connected with the lower swing arm 3 and cannot rotate, so that the nut 7 moves upwards along the axial direction of the screw 6. Go up swing arm 2 and 3 articulated structures of lower swing arm and make the pin joint of the two to the direction of keeping away from screw rod 6 and remove, and simultaneously along with the lower extreme of last swing arm 2 shifts up, electromagnetism is got and is also driven the cable to shift up simultaneously by ability coil 1. The cable is supported to one side while being lifted, thereby reducing sag.
Conversely, when the sag monitoring device finds that the sag exceeds the lower limit of the standard threshold range, it indicates that the sag is too small and the cable is tensioned. At this time, the drive motor 4 is reversely rotated, so that the nut 7 is moved downward in the axial direction of the screw 6. Go up swing arm 2 and swing arm 3 articulated structure down and make the pin joint of the two move to the direction that is close to screw rod 6, and simultaneously along with the lower extreme of going up swing arm 2 moves down, electromagnetism energy-taking coil 1 also drives the cable simultaneously and moves down. The cable retracts, the sag is increased, and the stress borne by the cable is reduced.
In practical applications, the electromagnetic energy pick-up coil 1 should be located between the maximum and minimum movement areas so that the cable has a range of adjustment whatever the situation is encountered.
According to the sag adjusting device for the overhead power cable, the electromagnetic energy taking coil 1 in the high-voltage cable induction power taking device is used as a supporting point of a cable, so that the electromagnetic energy taking coil 1 not only has the function of taking electricity, but also can be used for adjusting the tension and height of the cable, and sag adjustment is achieved. The sag adjusting device for the power overhead cable can detect sag problems and process the problems at the same time, so that the speed and the energy efficiency are ensured, and the risk of fault occurrence is reduced.
The second embodiment is as follows: the present embodiment is described in detail with reference to fig. 5, and is a further description of the overhead power cable sag adjustment device according to the first embodiment, and the overhead power cable sag adjustment device according to the present embodiment further includes a bracket 10, and the bracket 10 is used to support the overhead power cable sag adjustment device.
Further, in this embodiment, the support 10 is a straight rod, and the bottom end of the screw 6 is connected to the top of the straight rod through a bearing. During practical application, can directly establish the straight-bar on two electric towers or the ground between the pole, play the supporting role to flagging cable.
The third concrete implementation mode: the present embodiment is described in detail with reference to fig. 6, and is a further description of the overhead power cable sag adjustment device according to the first embodiment, and the overhead power cable sag adjustment device according to the present embodiment further includes a bracket 10, and the bracket 10 is configured to support the overhead power cable sag adjustment device.
Further, the stent 10 in this embodiment includes an upper strut 10-1 and a lower strut 10-2, and both the upper strut 10-1 and the lower strut 10-2 are "L" shaped. One end of the upper support rod 10-1 is fixedly connected with the motor 4, and one end of the lower support rod 10-2 is connected with the bottom end of the screw rod 6 through a bearing. When the support is actually applied, the other ends of the upper support rod 10-1 and the lower support rod 10-2 are installed on an electric tower or an electric pole, so that the occupied area is reduced.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (7)
1. The sag adjustment device of the power overhead cable comprises a sag monitoring device, a power supply of the sag monitoring device is a high-voltage cable induction electricity taking device,
its characterized in that, electric power overhead cable arc adjusting device that hangs down still includes: an upper swing arm (2), a lower swing arm (3), a motor (4), a screw (6), a nut (7) and a control part,
a power output shaft of the motor (4) is coaxially connected with one end of the screw rod (6), the screw rod (6) is in threaded connection with the nut (7), one end of the upper swing arm (2) is hinged with one end of the lower swing arm (3), the other end of the upper swing arm (2) is hinged with the shell of the motor (4), the other end of the lower swing arm (3) is hinged with the outer circumferential surface of the nut (7), the upper swing arm (2), the lower swing arm (3) and the screw rod (6) are positioned on the same plane,
an electromagnetic energy-taking coil (1) of the high-voltage cable induction electricity-taking device is fixed at one end of an upper swing arm (2), the middle shaft of the electromagnetic energy-taking coil (1) is vertical to the plane formed by the upper swing arm (2), a lower swing arm (3) and a screw rod (6),
the control part comprises a standard threshold range of the sag and a unit realized by the following software:
a sag monitoring device is used for acquiring sag units in real time,
a unit for comparing the acquired sag with a standard threshold range,
when the acquired sag is larger than the upper limit of the standard threshold range, the motor (4) is driven to rotate forwards,
a unit for driving the motor (4) to rotate reversely when the acquired sag is smaller than the lower limit of the standard threshold range,
a unit for driving the motor (4) to stop rotating when the acquired sag belongs to the standard threshold range,
when motor (4) corotation, screw rod (6) corotation, and then drive nut (7) and remove to screw rod (6) top, go up the pin joint of swing arm (2) and lower swing arm (3) and remove to the direction of keeping away from screw rod (6), when motor (4) reversal, screw rod (6) reversal, and then drive nut (7) and remove to screw rod (6) bottom, the pin joint of going up swing arm (2) and lower swing arm (3) removes to the direction that is close to screw rod (6).
2. The sag adjustment device for the overhead power cable according to claim 1, further comprising a fixed connection member (5), wherein the fixed connection member (5) is used for fixedly connecting a power output shaft of the motor (4) with the screw (6).
3. The power overhead cable sag adjustment device according to claim 1, further comprising a nut limiting block (8), wherein the nut limiting block (8) is fixed to the bottom of the screw (6).
4. The power overhead cable sag adjustment device according to claim 1, further comprising a swing arm limiting block (9), wherein the swing arm limiting block (9) is fixed on the nut (7), and the swing arm limiting block (9) is used for preventing the lower swing arm (3) from inclining towards the screw (6).
5. The overhead power cable sag adjustment device according to claim 1, further comprising a bracket (10), the bracket (10) being configured to support the overhead power cable sag adjustment device.
6. An electric overhead cable sag adjustment device according to claim 5, wherein the support (10) is a straight rod, and the bottom end of the screw (6) is connected with the top of the straight rod through a bearing.
7. An electric overhead cable sag adjustment device according to claim 5, wherein the bracket (10) comprises an upper support rod (10-1) and a lower support rod (10-2), the upper support rod (10-1) and the lower support rod (10-2) are both "L" -shaped,
one end of the upper supporting rod (10-1) is fixedly connected with the motor (4), and one end of the lower supporting rod (10-2) is connected with the bottom end of the screw rod (6) through a bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210042817.XA CN114374182A (en) | 2022-01-14 | 2022-01-14 | Sag adjusting device for power overhead cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210042817.XA CN114374182A (en) | 2022-01-14 | 2022-01-14 | Sag adjusting device for power overhead cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114374182A true CN114374182A (en) | 2022-04-19 |
Family
ID=81144505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210042817.XA Withdrawn CN114374182A (en) | 2022-01-14 | 2022-01-14 | Sag adjusting device for power overhead cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114374182A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825657A (en) * | 2023-02-23 | 2023-03-21 | 国网辽宁省电力有限公司 | Power distribution network line fault positioning instrument |
| CN117277185A (en) * | 2023-09-25 | 2023-12-22 | 江苏恒康电力科技有限公司 | Narrow base angle steel tower with adjustable cable sag |
-
2022
- 2022-01-14 CN CN202210042817.XA patent/CN114374182A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115825657A (en) * | 2023-02-23 | 2023-03-21 | 国网辽宁省电力有限公司 | Power distribution network line fault positioning instrument |
| CN117277185A (en) * | 2023-09-25 | 2023-12-22 | 江苏恒康电力科技有限公司 | Narrow base angle steel tower with adjustable cable sag |
| CN117277185B (en) * | 2023-09-25 | 2024-04-26 | 江苏恒康电力科技有限公司 | Narrow base angle steel tower with adjustable cable sag |
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Application publication date: 20220419 |
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| WW01 | Invention patent application withdrawn after publication |