CN111929537A - Self-propelled overhead cable damage detection device and detection method - Google Patents
Self-propelled overhead cable damage detection device and detection method Download PDFInfo
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- CN111929537A CN111929537A CN202011081339.0A CN202011081339A CN111929537A CN 111929537 A CN111929537 A CN 111929537A CN 202011081339 A CN202011081339 A CN 202011081339A CN 111929537 A CN111929537 A CN 111929537A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
Abstract
The invention relates to a self-propelled overhead cable damage detection device and a detection method. Its technical scheme does, a self-propelled high altitude cable damage detection device, including detection mechanism and two motion at detection mechanism both ends, detection mechanism is including detecting the casing, detects casing center and link up, and inside is equipped with the control module that detecting part and be connected with the detecting part electricity, and detecting part is for detecting the ring, installs the range finding sensor of a certain amount on the profile in detecting the ring, and range finding sensor's measuring direction is radial for detecting the ring, and range finding sensor's probe is located the intracavity that link up at detection casing center. The invention has the advantages that the motion mechanism drives the detection mechanism to move, automatic detection is realized, no manual work is needed, the cable detection device is suitable for long-distance and high-rise cables, meanwhile, the two motion mechanisms are provided with the two end supports in the front and at the back, the device can run more stably, the annular detection part can detect the cables in all directions simultaneously, and the detection effect is better.
Description
Technical Field
The invention relates to the field of cable maintenance, in particular to a self-propelled overhead cable damage detection device and a detection method.
Background
In a power distribution network, a high-voltage cable is often erected on a distribution network tower in a suburb, and the high-voltage cable has the characteristics of high erection height and large distance between two electric towers. After the erection is finished, no person is required to maintain except for regular maintenance and sudden accidents. The cable is exposed to the external environment for a long time, the damage of the sheath of the cable is easily caused due to the problems of acid rain corrosion, physical damage and the like at present, but the condition of the sheath damage on the cable is difficult to find due to the suburb, inconvenient traffic, high risk of overhead operation and low maintenance frequency of the cable.
The existing overhaul is that workers are sent to a cable position for manual observation through an aerial ladder vehicle, and the method is not suitable for cables with long span and high erection positions. Therefore, there is a need for a device that can automatically detect high-altitude cables without manual operation.
Disclosure of Invention
The invention provides a self-propelled overhead cable damage detection device which is installed simultaneously when a cable is erected and runs completely automatically after installation, aiming at the problems that the existing cable detection method needs manual operation and is not suitable for high-altitude and long-distance detection.
In order to solve the problems, the invention adopts the technical scheme that the self-propelled overhead cable damage detection device comprises a detection mechanism and two movement mechanisms arranged at two ends of the detection mechanism, the detection mechanism comprises a detection shell, the center of the detection shell is communicated, a detection part and a control module electrically connected with the detection part are arranged in the detection mechanism, the detection part is a detection ring, a certain number of distance measurement sensors are arranged on the inner contour of the detection ring, the measurement direction of the distance measurement sensors is the radial direction of the detection ring, and probes of the distance measurement sensors are positioned in a through cavity at the center of the detection shell. This design passes through motion drive detection mechanism motion, has realized automated inspection, need not the manual work, is fit for apart from long, erect high cable, sets up both ends simultaneously around two motion and supports, makes the device operation more steady, and annular detecting element can detect the all-round while of cable, and detection effect is better.
Preferably, the motion mechanism comprises a motion machine shell, the outer contour of the motion machine shell is a hexagonal prism, and the inner center of the motion machine shell is provided with a hexagonal prism through hole along the axial direction;
the three sides that are not adjacent each other in hexagonal prism downthehole portion are equipped with the gyro wheel respectively, and inside the motion casing, with the corresponding position of gyro wheel install three motor, the motor passes through the drive belt and drives the gyro wheel rotation. Because the geometrical property of the hexagonal prism, the included angle of every two of the three rollers is 120 degrees, stable centering installation of the cable can be realized, the device runs more stably, and the measurement of the distance measuring sensor is more accurate.
Preferably, the outline of the detection casing is a hexagonal prism, three mutually non-adjacent faces outside the detection casing are respectively provided with a solar panel, two ends of the detection casing are respectively provided with a power supply plug, one end of the movement casing is provided with a power supply interface for plugging the power supply plug, and the solar panel supplies power for the motor. The solar panel power supply has realized the self-power supply operation of device, need not the manual work and has pulled down the charging, has saved the cost of labor, and simultaneously, solar panel is three, no matter how the device rotates, all can have solar panel to accept sunshine and shine.
Preferably, a battery is also arranged in the detection shell; the solar panel supplies power for the battery, and the battery supplies power for the motor. The device can also operate when the illumination is insufficient, and the cruising ability is further improved.
Preferably, the control module further comprises a motion control module, two ends of the detection shell are respectively provided with a communication plug, and one side of the motion shell is provided with a communication interface; the other side of the motion shell is also provided with a press switch;
the motion control module is respectively electrically connected with the press switch and the motor. This design makes damage detection device can realize reciprocating motion.
Preferably, the detection casing is internally provided with a balancing weight, the battery and the control module are respectively arranged at the positions of three sides of the detection casing, which are not adjacent to each other, in the hexagonal prism shape, and the quality of the balancing weight is the average value of the battery quality and the control module quality. The balance weight makes the operation of the damage detection device more stable.
The invention also provides a cable breakage detection method, which comprises the following steps:
A. an assembling procedure:
sleeving the transmission belt into the groove of the roller;
a transmission belt penetrates through a square hole in one side wall of a hexagonal prism hole in the inner side of the moving machine shell, and meanwhile, a roller is installed on the moving machine shell;
sleeving a transmission belt on a belt wheel on a motor shaft of the motor, and fixedly installing the motor in the moving shell to finish the assembly of the moving mechanism;
mounting a balancing weight to the inside of the detection casing;
installing a detection ring;
installing a battery and a control module;
mounting the three solar panels on the outer wall of the detection shell to complete the assembly of the detection mechanism;
inserting the mounting columns of the two assembled motion mechanisms into mounting holes at two ends of the assembled detection mechanism, simultaneously inserting a power supply plug into a power supply interface and inserting a communication plug into a communication interface to complete the assembly of the damage detection device;
B. an installation procedure:
when the cable is erected, one end of the cable is inserted into the through hole in the center of the damage detection device;
connecting the end of the cable to the electric tower to complete erection;
C. a breakage detection step:
the damage detection device reciprocates along the cable;
in the motion process, range sensor constantly detects the position on cable surface, has two kinds of situations: a. the cable skin is intact, and the measuring result of the distance measuring sensor does not change at the moment; b. the cable skin is damaged, and the measuring result of the distance measuring sensor is changed unevenly;
when the condition b occurs, the distance measuring sensor sends a signal to a positioning module in the control module, and the positioning module sends the position information of the damage detection device to the upper computer A for recording.
Preferably, the reciprocating motion in the breakage detection process performs the steps of:
the motor runs to enable the damage detection device to run along the cable;
when the damage detection device runs to one end of the cable, the damage detection device touches the connecting part of the cable and the electric tower, and the switch is pressed to trigger;
the push switch sends a signal to a motion control module in the control module;
the motion control module controls the motor to run reversely, so that the damage detection device runs towards the other end of the cable;
when the damage detection device reaches the other end of the cable, the direction is changed again, and the automatic reciprocating operation of the damage detection device on the cable is realized.
According to the technical scheme, the breakage detection device provided by the invention has the advantages that:
(1) self-powered, manual detachment and charging are not needed, and labor cost is saved;
(2) the installation is centered, and the operation is stable;
(3) the annular detection component has better detection effect;
(4) the solar panel and the battery are cooperatively used for supplying power, so that the cruising ability is good;
(5) has control and communication functions.
Meanwhile, the damage detection device is installed during cable erection, and the damage detection device runs and detects automatically after installation, so that the later labor cost is thoroughly saved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is an exploded view of fig. 1.
Fig. 3 is a left side view of fig. 1.
Fig. 4 is a schematic view of the internal structure of the motion mechanism according to the embodiment of the present invention.
Fig. 5 is a schematic view of the internal structure of the detection mechanism according to the embodiment of the present invention.
FIG. 6 is a schematic diagram of the operation of the control module in accordance with an embodiment of the present invention.
In the figure: 1. the device comprises a motion mechanism, 1-1, a first motion mechanism, 1-2, a second motion mechanism, 11, a motion shell, 12, a roller, 13, a transmission belt, 14, a motor, 14-1, a motor I, 14-2, a motor II, 15, a press switch, 15-1, a press switch I, 15-2, a press switch II, 16, a power supply interface, 17, a communication interface and 18, a mounting column;
2. the detection mechanism comprises: 21. the device comprises a detection shell, 22, a detection ring, 221, a distance measuring sensor, 23, a battery, 24, a control module, 241, a motion control module, 242, a positioning module, 25, a balancing weight, 26, a communication plug, 27, a power supply plug and 28, and a mounting hole;
3. a solar panel;
A. and (4) an upper computer.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the present embodiment, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all 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 scope of protection of this patent. The terms "first" and "second" in the description and claims of the present invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
A self-propelled overhead cable breakage detection device (hereinafter referred to as a breakage detection device) comprises a detection mechanism 2 and two movement mechanisms 1 arranged at two ends of the detection mechanism 2; the detection mechanism 2 comprises a detection casing 21, wherein the center of the detection casing 21 is through, and a detection part and a control module 24 electrically connected with the detection part are arranged in the detection casing.
The detection part is a detection ring 22, a certain number of distance measuring sensors 221 are mounted on the inner contour of the detection ring 22, the measuring direction of the distance measuring sensors 221 is the radial direction of the detection ring 22, and probes of the distance measuring sensors 221 are located in a through cavity in the center of the detection shell 21.
The movement mechanism 1 comprises a movement machine shell 11, the outer contour of the movement machine shell 11 is a hexagonal prism, and the inner center of the movement machine shell is provided with a hexagonal prism through hole along the axial direction; the three sides that are not adjacent each other in hexagonal prism downthehole portion are equipped with gyro wheel 12 respectively, and inside the motion casing 11, the position that corresponds with gyro wheel 12 installs three motor 14, and motor 14 passes through drive belt 13 and drives gyro wheel 12 and rotate.
The outline of the detection casing 21 is a hexagonal prism, three mutually non-adjacent surfaces outside the detection casing 21 are respectively provided with a solar panel 3, two ends of the detection casing 21 are respectively provided with a power supply plug 27, one end of the movement casing 11 is provided with a power supply interface 16 inserted with the power supply plug 27, and the solar panel 3 supplies power for the motor 14. A battery 23 is also arranged in the detection case 21; the solar panels 3 also 1 power the battery 23, which battery 23 may power the motor 14.
Detect casing 21 inside still to install the balancing weight 25, battery 23 and control module 24 set up respectively in the position that detects casing 21 hexagonal prism appearance three side that are not adjacent each other, and the quality of balancing weight 25 makes damaged detection device weight distribution even for the mean value of battery 23 quality and the 24 quality of control module, and the operation effect is better.
The control module 24 further comprises a motion control module 241, two ends of the detection case 21 are respectively provided with a communication plug 26, and one side of the motion case 11 is provided with a communication interface 17; the other side of the motion shell 11 is also provided with a press switch 15; the motion control module 241 is electrically connected to the push switch 15 and the motor 14, respectively.
The detection shell 21 and the motion shell 11 are made of aluminum alloy materials, so that the weight is light, and the cable cannot be subjected to too large load due to gravity; meanwhile, the strength is high, and the product is firm and durable; the rollers 12 are made of rubber materials and are not easy to slip when running along the cable.
The invention also provides a motion control method of the self-propelled overhead cable damage detection device, which comprises the following steps:
the motor 14 is operated to cause the breakage detection means to operate along the cable;
when the damage detection device runs to one end of the cable, the damage detection device touches the connecting part of the cable and the electric tower, and the press switch 15 is triggered;
push switch 15 sends a signal to a motion control module in control module 24;
the motion control module controls the motor 14 to run reversely, so that the damage detection device runs towards the other end of the cable;
when the damage detection device reaches the other end of the cable, the direction is changed again, and the automatic reciprocating operation of the damage detection device on the cable is realized.
The invention also provides a cable breakage detection method, which comprises the following steps:
A. an assembling procedure:
sleeving the transmission belt 13 into the groove of the roller 12;
a transmission belt 13 is penetrated through a square hole on one side wall of a hexagonal prism hole on the inner side of the moving machine shell 11, and a roller 12 is installed on the moving machine shell 11;
sleeving a transmission belt on a belt wheel on a motor shaft of the motor 14, and fixedly installing the motor in the moving shell 11 to finish the assembly of the moving mechanism 1;
mounting a weight 25 to the inside of the inspection housing 21;
installing a detection ring 22;
installing a battery 23 and a control module 24;
the three solar panels 3 are arranged on the outer wall of the detection shell 21 to complete the assembly of the detection mechanism 2;
inserting the mounting posts 18 of the two assembled motion mechanisms 1 into the mounting holes at the two ends of the assembled detection mechanism 2, simultaneously inserting the power supply plug 27 into the power supply interface 16 and inserting the communication plug 26 into the communication interface 17, and completing the assembly of the damage detection device;
B. an installation procedure:
when the cable is erected, one end of the cable is inserted into the through hole in the center of the damage detection device;
connecting the end of the cable to the electric tower to complete erection;
C. a breakage detection step:
the damage detection device reciprocates along the cable;
in the process of movement, the distance measuring sensor 221 continuously detects the position of the cable surface, and there are two situations: a. the cable skin is intact, and the measuring result of the distance measuring sensor does not change at the moment; b. the cable skin is damaged, and the measuring result of the distance measuring sensor is changed unevenly;
when the condition b occurs, the distance measuring sensor 221 sends a signal to the positioning module 242 in the control module 24, and the positioning module 242 sends the position information of the damage detection device to the upper computer a for recording.
The reciprocating motion in the breakage detection process executes the following steps:
the motor 14 is operated to cause the breakage detection means to operate along the cable;
when the damage detection device runs to one end of the cable, the damage detection device touches the connecting part of the cable and the electric tower, and the press switch 15 is triggered;
push switch 15 sends a signal to a motion control module in control module 24;
the motion control module controls the motor 14 to run reversely, so that the damage detection device runs towards the other end of the cable;
when the damage detection device reaches the other end of the cable, the direction is changed again, and the automatic reciprocating operation of the damage detection device on the cable is realized.
Meanwhile, the implementation method of the reciprocating motion is not limited to this, and other methods conventional in the art, such as a travel switch, a photoelectric switch, control by a positioning module, etc., may also be adopted.
In the invention, the control principle of the control module is shown in fig. 6, the control module comprises a motion control module 241 and a positioning module 242, a first push switch 15-1 and a second push switch 15-2 at two ends of the damage detection device are used as the input of the motion control module 241, a first motor 14-1 and a second motor 14-2 are used as the output of the motion control module 241, and when the first push switch 15-1 or the second push switch 15-2 is triggered, the first motor 14-1 and the second motor 14-2 change directions for one time. The detection ring 22 is electrically connected with the positioning module 242, and when the data measured by the distance measuring sensor 221 on the detection ring 22 changes suddenly, the positioning module 242 sends the current geographical position of the damage detection device to the upper computer a.
The distance measuring sensor 221 may be a laser distance measuring sensor, and the upper computer a may be a computer, a server of a power supply company, or an intelligent terminal such as a mobile phone of a related worker.
For measurement errors: because of being influenced by external environment such as strong wind, the cable shakes and probably causes distance measuring sensor's measured data to change to trigger orientation module and carry out position transmission, to the error that this kind of condition arouses, the solution is: since the damage detection device is operated in a reciprocating manner, the same position is detected for a plurality of times at intervals, if the cable is intact, the number of times of detection as abnormality is certainly less than that of the actual damaged position, so that a worker can set a threshold value for recording the number of times, the position where the recorded number of times reaches the threshold value is determined as the damaged position, and errors can be filtered.
Meanwhile, the recording times can also reflect the damage degree, namely, the more the recording times of the recorded position, the longer the damage time of the position is proved, and the larger the damage degree is. Because the sheath of the long-distance cable is usually thick, the cable is slightly damaged without manpower for maintenance, and whether the cable needs to be maintained or not can be judged by recording times.
As can be seen from the above embodiments, the breakage detection device provided by the present invention has the following beneficial effects: self-powered, manual detachment and charging are not needed, and labor cost is saved; the installation is centered, and the operation is stable; the annular detection component has better detection effect; the solar panel and the battery are cooperatively used for supplying power, so that the cruising ability is good; has control and communication functions.
Meanwhile, the damage detection device is installed during cable erection, and the damage detection device runs and detects automatically after installation, so that the later labor cost is thoroughly saved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The self-propelled overhead cable damage detection device is characterized by comprising a detection mechanism (2) and two movement mechanisms (1) arranged at two ends of the detection mechanism (2), wherein the detection mechanism (2) comprises a detection shell (21), the center of the detection shell (21) is through, and a detection part and a control module (24) electrically connected with the detection part are arranged in the detection shell (21);
the detection part is a detection ring (22), a certain number of distance measurement sensors (221) are mounted on the inner contour of the detection ring (22), the measurement direction of each distance measurement sensor (221) is the radial direction of the detection ring (22), and probes of the distance measurement sensors (221) are located in a through cavity in the center of the detection shell (21).
2. The self-propelled overhead cable breakage detection device according to claim 1, wherein the movement mechanism (1) comprises a movement housing (11), the movement housing (11) has a hexagonal prism outer contour, and a hexagonal prism hole axially penetrating is formed in the inner center;
the three sides that are not adjacent each other in hexagonal prism downthehole portion are equipped with gyro wheel (12) respectively, inside motion casing (11), with three motor (14) are installed to the corresponding position of gyro wheel (12), motor (14) pass through drive belt (13) and drive gyro wheel (12) rotate.
3. The self-propelled overhead cable breakage detection device according to claim 2, wherein the outer contour of the detection housing (21) is a hexagonal prism, three surfaces of the detection housing (21) which are not adjacent to each other are respectively provided with the solar panel (3), two ends of the detection housing (21) are respectively provided with the power supply plug (27), one end of the movement housing (11) is provided with the power supply interface (16) which is plugged with the power supply plug (27), and the solar panel (3) supplies power to the motor (14).
4. The self-propelled overhead cable breakage detection device of claim 3, wherein a battery (23) is further provided inside the detection housing (21); the solar panel (3) supplies power to the battery (23), and the battery (23) supplies power to the motor (14).
5. The self-propelled overhead cable breakage detection device according to claim 4, wherein the control module (24) further comprises a motion control module (241), communication plugs (26) are respectively arranged at two ends of the detection housing (21), and a communication interface (17) is arranged at one side of the motion housing (11); the other side of the motion machine shell (11) is also provided with a press switch (15);
the motion control module (241) is electrically connected with the push switch (15) and the motor (14) respectively.
6. The self-propelled overhead cable breakage detection device according to claim 4 or 5, wherein a weight block (25) is further installed inside the detection housing (21), the weight block (25), the battery (23) and the control module (24) are respectively arranged at three positions of the three sides of the detection housing (21) where the hexagonal prism shapes are not adjacent to each other, and the mass of the weight block (25) is an average value of the mass of the battery (23) and the mass of the control module (24).
7. A cable breakage detection method is characterized by comprising the following steps:
A. an assembling procedure:
sleeving a transmission belt (13) into the groove of the roller (12);
the transmission belt (13) penetrates through a square hole on one side wall of a hexagonal prism hole on the inner side of the moving machine shell (11), and the roller (12) is installed on the moving machine shell (11);
sleeving the transmission belt on a belt wheel on a motor shaft of the motor (14), and fixedly installing the motor in the moving shell (11) to finish the assembly of the moving mechanism (1);
mounting a counterweight (25) inside the detection housing (21);
installing a detection ring (22);
installing a battery (23) and a control module (24);
mounting the three solar panels (3) on the outer wall of the detection casing (21) to complete the assembly of the detection mechanism (2);
inserting the mounting columns (18) of the two assembled motion mechanisms (1) into mounting holes at two ends of the assembled detection mechanism (2), simultaneously inserting the power supply plug (27) into the power supply interface (16), inserting the communication plug (26) into the communication interface (17), and completing the assembly of the damage detection device;
B. an installation procedure:
when the cable is erected, one end of the cable is inserted into the through hole in the center of the damage detection device;
connecting the end of the cable to the electric tower to complete erection;
C. a breakage detection step:
the damage detection device reciprocates along the cable;
during the movement, the distance measuring sensor (221) continuously detects the position of the cable surface, and two conditions exist: a. the cable skin is intact, and the measuring result of the distance measuring sensor does not change at the moment; b. the cable skin is damaged, and the measuring result of the distance measuring sensor is changed unevenly;
when the condition b occurs, the distance measuring sensor (221) sends a signal to a positioning module (242) in the control module (24), and the positioning module (242) sends the position information of the damage detection device to an upper computer (A) for recording.
8. The method of claim 7, wherein the reciprocating motion in the breakage detection step performs the steps of:
the motor (14) operates to cause the damage detection device to operate along the cable;
when the damage detection device runs to one end of the cable, the damage detection device touches the connecting part of the cable and the electric tower, and the press switch (15) is triggered;
the push switch (15) sends a signal to a motion control module in the control module (24);
the motion control module controls the motor (14) to run reversely, so that the damage detection device runs towards the other end of the cable;
when the damage detection device reaches the other end of the cable, the direction is changed again, and the automatic reciprocating operation of the damage detection device on the cable is realized.
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| CN112858339A (en) * | 2021-01-20 | 2021-05-28 | 广东电网有限责任公司 | Cable breakage detection device |
| CN112946427A (en) * | 2021-03-16 | 2021-06-11 | 国家电网有限公司 | Detection apparatus capable of quickly positioning damaged position of cable |
| CN113984973A (en) * | 2021-11-05 | 2022-01-28 | 国家电网有限公司 | A damaged automatic checkout device of high altitude cable for power supply |
| CN114002545A (en) * | 2021-10-19 | 2022-02-01 | 国网辽宁省电力有限公司铁岭供电公司 | Method and device for accurately and quickly measuring and calculating extra-high voltage transformation project conductor |
| CN114834071A (en) * | 2022-07-06 | 2022-08-02 | 广东电网有限责任公司佛山供电局 | High tension cable repair liquid injection device |
| CN115201221A (en) * | 2022-06-18 | 2022-10-18 | 武正彤 | Detection device and detection method for preventing external damage of power cable |
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| CN112858339A (en) * | 2021-01-20 | 2021-05-28 | 广东电网有限责任公司 | Cable breakage detection device |
| CN112946427A (en) * | 2021-03-16 | 2021-06-11 | 国家电网有限公司 | Detection apparatus capable of quickly positioning damaged position of cable |
| CN114002545A (en) * | 2021-10-19 | 2022-02-01 | 国网辽宁省电力有限公司铁岭供电公司 | Method and device for accurately and quickly measuring and calculating extra-high voltage transformation project conductor |
| CN113984973A (en) * | 2021-11-05 | 2022-01-28 | 国家电网有限公司 | A damaged automatic checkout device of high altitude cable for power supply |
| CN115201221A (en) * | 2022-06-18 | 2022-10-18 | 武正彤 | Detection device and detection method for preventing external damage of power cable |
| CN115201221B (en) * | 2022-06-18 | 2023-09-15 | 广西广业云沣电力工程有限公司 | Detection device and detection method for preventing power cable from being broken outwards |
| CN114834071A (en) * | 2022-07-06 | 2022-08-02 | 广东电网有限责任公司佛山供电局 | High tension cable repair liquid injection device |
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