CN215985966U - Power cable insulation overheat detection device - Google Patents
Power cable insulation overheat detection device Download PDFInfo
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- CN215985966U CN215985966U CN202122121858.1U CN202122121858U CN215985966U CN 215985966 U CN215985966 U CN 215985966U CN 202122121858 U CN202122121858 U CN 202122121858U CN 215985966 U CN215985966 U CN 215985966U
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Abstract
The utility model discloses a power cable insulation overheat detection device, which comprises a detection mechanism and a detection host machine, wherein the detection mechanism and the detection host machine are connected through a data connecting line; the detection mechanism comprises a sensor array arranged on the soft cloth, and the output end of the sensor array is connected with the input end of the detection mechanism; the detection host is provided with a first display screen, a second display screen and a starting button, the controller is arranged inside the detection host, the output end of the starting button is connected with the input end of the controller, and the output end of the controller is respectively connected with the input ends of the first display screen and the second display screen. The method can assist field operation and maintenance personnel to quickly judge the overheating degree of the crosslinked polyethylene insulating material of the power cable, realize the field quick evaluation of the overheating degree of the crosslinked polyethylene insulating material of the power cable, provide information early warning and corresponding treatment suggestions for later-stage overheating faults of the power cable, and protect and navigate the safe and stable operation of the power cable line.
Description
Technical Field
The utility model relates to the technical field of power detection, in particular to a power cable insulation overheating detection device.
Background
In recent years, with the continuous improvement of urbanization and the requirement of high reliability of power supply in a core region of a city, the cabling rate of an urban power grid continuously rises, and the total amount of high-voltage cable equipment is kept to be increased by 13% rapidly every year.
Correspondingly, the overground channel resources in the urban core area are abnormally short, the batch difficulty of power cable channel paths is increased day by day, the underground cable channel resources are increasingly short due to linkage, the conditions that power cables with different voltage classes are densely laid on the same channel are increased continuously, the fire prevention measures cannot be fully considered in the early stage construction of part of cable channels, the fire prevention isolation measures of cables with the same channel of high-voltage cables and the same channel of neutral points in an ineffective grounding mode are not completely implemented, the optical cable arrangement is not standard, the construction is lack of effective control, and the fire monitoring and early warning measures in part of channels are still imperfect. In case of a section loss event or accident of a cable channel, particularly an important cable channel, caused by fire due to insulation overheating, large-area power failure in cities and towns occurs, so that the severe social influence is caused and the economic loss is hardly estimated.
Meanwhile, many fireproof products entering the power system every year are numerous, and the fireproof performance is also different. Once products such as flame-retardant materials and plugging materials with poor quality or unqualified fireproof performance enter the cable underground passage, great potential safety hazards exist. Correspondingly, underground power cable channel resources become more tense and crowded along with the rapid increase of cable scale, the conditions of densely laying power cables with different voltage grades, particularly power transmission and distribution cable channels, are increased continuously, and the distribution cables are more prone to fault operation for a period of time, so that various fire prevention and overheating prevention problems are still outstanding, and the large-area power failure risk always exists. Particularly, under the conditions of high cabling rate, dense load, high power supply guarantee requirement and the like in the urban core area, extremely bad social influence can be caused if the section of a cable channel is lost due to abnormal conditions such as cable overheating.
It is expected that the number, coverage and operation environment of power cables in a power system will face more difficulties and troublesome problems, and the reliable and stable operation of the power cables has great significance to the power system. Under normal conditions, when the manufacturing process and the manufacturing material of the power cable, the strict execution rule requirement degree of the manufacturing process of the cable accessories, the overvoltage of the power system, the load size, the laying surrounding environment and the like are in normal and controllable ranges, the power cable generally cannot have the common overheating defects of a voltage heating type, a current heating type, a comprehensive heating type and the like. Otherwise, the power cable line is easily overheated, which directly causes insulation breakdown and failure in serious cases, resulting in serious consequences. According to incomplete statistics, the proportion of the electric fire in the 2010-2019 serious fire is as high as nearly 50%, and the power cable overheating fault caused by the overheating defect of the power cable and accessories or the insulation breakdown caused by the cable fault is nearly 60% of the whole electric fire. Therefore, accurate and timely early warning is carried out aiming at the overheat abnormal stage when the cable insulating material is overheated and even before a fire disaster is caused, and the method has extremely important significance for finding and eliminating potential hidden dangers of the power cable, restraining the fault area from expanding, guaranteeing the safety of a power grid, equipment, personnel and property and the like.
However, at present, the detection of the cable overheating defect still remains to be carried out by means of conventional infrared and distributed optical fiber temperature measurement and the like. The two power cable body temperature detection methods have the following defects:
when the power cable runs in an electrified mode, if the temperature of a certain part is abnormal, the conventional infrared and distributed temperature measurement results can only reflect the surface temperature of the tested part, and the actual temperature rise condition in the cable is difficult to accurately reflect, so that the data value of the measured temperature of an instrument is greatly reduced, and valuable test data support is difficult to practically provide for field operation and maintenance work.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a power cable insulation overheating detection device, which can realize on-site rapid evaluation of the overheating degree of a cable crosslinked polyethylene insulation material.
In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.
A power cable insulation overheating detection device comprises a detection mechanism and a detection host, wherein the detection mechanism is connected through a data connecting line and used for detecting characteristic gas generated by cable overheating, and the detection host is used for analyzing the detection gas; the detection mechanism comprises a sensor array arranged on the soft cloth, and the output end of the sensor array is connected with the input end of the detection mechanism; the detection host is provided with a first display screen for displaying the content of harmful gases, a second display screen for displaying the evaluation result and a starting button for starting the detection host, a controller is arranged in the detection host, the output end of the starting button is connected with the input end of the controller, and the output end of the controller is respectively connected with the input ends of the first display screen and the second display screen.
In the above power cable insulation overheat detection device, the sensor array is a 3 × 5 array of gas detection sensors.
In the power cable insulation overheat detection device, the arrangement distance between the adjacent gas detection sensors in the transverse direction is 1 m.
Above-mentioned power cable insulation overheat detection device, still be provided with in the detection host computer and be used for uploading the communication unit of intelligent management and control platform with the testing result.
Due to the adoption of the technical scheme, the technical progress of the utility model is as follows.
The method can assist field operation and maintenance personnel to quickly judge the overheating degree of the crosslinked polyethylene insulating material of the power cable, realize the field quick evaluation of the overheating degree of the crosslinked polyethylene insulating material of the power cable, provide information early warning and corresponding treatment suggestions for later-stage overheating faults of the power cable, and protect and navigate the safe and stable operation of the power cable line.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic structural diagram of the detecting mechanism according to the present invention;
FIG. 3 is a circuit diagram of a controller according to the present invention;
fig. 4 is a circuit diagram of a communication unit according to the present invention.
Wherein: 1. the intelligent management and control system comprises a detection host, 2 data connecting lines, 3 detection mechanisms, 4 first display screens, 5 second display screens, 6 starting buttons, 7 sensor arrays and 8 intelligent management and control platforms.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A power cable insulation overheating detection device is shown in a structural block diagram in fig. 1, and comprises a detection host 1 and a detection mechanism 3, wherein the detection host 1 and the detection mechanism 3 are connected through a data connection line 2 to transmit detection data.
The detection mechanism 3 comprises a sensor array 7, the sensor array is arranged on the soft cloth and used for detecting the characteristic gas generated by cable overheating, and the output end of the sensor array 7 is connected with the input end of the detection host 1 through the data connecting line 2.
The sensor array 7 is a 3 x 5 array of gas detection sensors, the gas detection sensors are sequentially embedded on a special soft cloth, the arrangement distance between every two adjacent gas detection sensors in the transverse direction is set to be 1m, the detection requirement of a cable body close to 2-3 meters can be met, the vertical gas detection sensors can be automatically arranged according to the outer diameters of power cables with different sections on site, and the gas detection sensors are more flexible and close to the actual operation and maintenance situation on site.
Detect and be provided with first display screen 4 on the host computer 1, second display screen 5 and start button 6, first display screen 4 is used for showing poisonous and harmful gas's content, second display screen 5 is used for showing the aassessment result, start button 6 is used for starting to detect the host computer, the inside that detects host computer 1 is provided with the controller, start button's output connection director's input, the input of first display screen and second display screen is connected respectively to the output of controller. The circuit diagram of the controller according to the present invention is as shown in fig. 3, and the signal processing is performed using an STM8L052R8T6 chip.
The detection host 1 is also internally provided with a communication unit for uploading the detection result to the intelligent control platform 8, and the staff can acquire the detection result through the intelligent control platform 8, so as to perform subsequent analysis and diagnosis. The circuit diagram of the communication unit of the utility model is shown in fig. 4, a MAX232 chip is adopted to upload the detection result to the intelligent control platform, and pins 9 and 10 of the communication unit are respectively connected with pins 14 and 15 of the controller to receive the signal sent by the controller.
When the intelligent cable test system is used on site, after the detection mechanism is connected with the detection host machine through the data connecting line, the detection mechanism is directly wound on the appointed part of a cable test object, the starting button on the detection host machine is started, the detection host machine starts to measure, corresponding test results are displayed on the first display screen and the second display screen, the detection results are uploaded to the intelligent control platform through the communication unit, and workers can remotely analyze and diagnose the detection results.
Claims (4)
1. The utility model provides a power cable insulation overheat detection device which characterized in that: the detection device comprises a detection mechanism (3) and a detection host (1), wherein the detection mechanism (3) is connected through a data connection line (2) and is used for detecting characteristic gas generated by cable overheating; the detection mechanism (3) comprises a sensor array (7) arranged on the soft cloth, and the output end of the sensor array is connected with the input end of the detection mechanism; the detection host machine (1) is provided with a first display screen (4) for displaying harmful gas content, a second display screen (5) for displaying an evaluation result and a starting button (6) for starting the detection host machine, a controller is arranged inside the detection host machine (1), the output end of the starting button is connected with the input end of the controller, and the output end of the controller is respectively connected with the input ends of the first display screen and the second display screen.
2. A power cable insulation overheat detecting apparatus as claimed in claim 1, wherein: the sensor array (7) is a 3 x 5 array of gas detection sensors.
3. A power cable insulation overheat detecting apparatus as claimed in claim 2, wherein: the arrangement pitch of adjacent gas detection sensors in the lateral direction is 1 m.
4. A power cable insulation overheat detecting apparatus as claimed in claim 1, wherein: the detection host (1) is also internally provided with a communication unit for uploading the detection result to the intelligent management and control platform (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122121858.1U CN215985966U (en) | 2021-09-03 | 2021-09-03 | Power cable insulation overheat detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122121858.1U CN215985966U (en) | 2021-09-03 | 2021-09-03 | Power cable insulation overheat detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215985966U true CN215985966U (en) | 2022-03-08 |
Family
ID=80521751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122121858.1U Expired - Fee Related CN215985966U (en) | 2021-09-03 | 2021-09-03 | Power cable insulation overheat detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215985966U (en) |
-
2021
- 2021-09-03 CN CN202122121858.1U patent/CN215985966U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220308 |