How to check and repair cable line faults?

[ Focus on Chemical Machinery Equipment Network ] Electricity is an important energy indispensable for modern social production and economic development.
In daily life, the lights in the city at night, the use of electronic products and air conditioners and other household appliances, all use electric energy as the basis.
Electric energy transmission is a prerequisite for guaranteeing electric energy supply and normal use, and it is mainly realized through power transmission lines.
Therefore, transmission lines are also called the "blood vessels" and "nerves" of the national economy.

 

In recent years, with the continuous acceleration of China's urbanization process, the demand for electric energy in various fields has continued to increase, which has led to the rapid development of the wire and cable industry, and related products have been widely used in power, construction, communications, petrochemical and other fields.
According to the structure, power transmission lines can be divided into two types: overhead transmission lines and cable lines.
Overhead transmission lines are mainly composed of wires, line fittings, overhead ground wires, insulator strings, towers, and grounding devices, and are erected on the ground.
The cable line is mainly composed of core, insulation layer, shielding layer and protective layer.
It is mainly used for urban underground power grids, power station outlet lines, internal power supply of industrial and mining enterprises, and underwater transmission lines across the river.

 

If the transmission line fails, it will not only directly affect the power supply of the power grid and people's daily life, but also cause huge economic losses.
Therefore, strengthening the maintenance of power transmission lines and timely repairing and replacing damaged power lines are of great significance to ensuring the normal operation of the power supply grid.
Compared with overhead lines, cable lines do not need to be erected, and have the advantages of reliable operation, convenient layout, little damage by external forces and less investment.
However, cable lines also have the problem of difficult joints, and the construction process is more complicated and easy to form Hidden dangers in construction quality, in addition to the fact that most of the cable lines are buried underground, and the working environment in which they are located is relatively harsh, so the probability of failure is also higher.

 

　　The maintenance of cable line faults requires the help of a variety of professional non-destructive testing equipment.
With the rapid development of science and technology, more and more detection technologies and methods are used in the maintenance of cable lines, among which X-ray imaging detection technology is common.
X-rays have strong penetrability, can pass through the surface of the object to obtain information inside the sample, and are not affected by electromagnetic fields.
During the inspection, X-rays are used to transilluminate the inside of the object to be measured, and the results of the shooting are processed into digital signals, which are presented in an image format.
If there is an abnormality in the cable line or the joint, the intensity of the rays transmitted in the area will be on the picture The blackness difference is generated to help the maintenance personnel to quickly and accurately assess the location of the cable defect and visually analyze the degree of the defect.

 

　　X-ray imaging detection technology has the advantages of portability, fast detection speed, high sensitivity, etc.
, and the amount of radiation on the spot is small, which will not cause harm to the staff.
In addition, other common methods used in cable line fault detection include ultrasonic flaw detector, fluorescence penetration method, magnetic particle detection method and eddy current detection method, which can analyze and evaluate the faults in overhead transmission lines and cable lines.

 

　　With the continuous development of urban construction, the use of cable lines will inevitably be fully popularized.
Electromechanical engineers should be proficient in cable testing techniques and methods, and timely and effectively eliminate cable faults according to different construction conditions and tool conditions.
Non-destructive testing equipment will also be improved.
I wish them a helping hand.

 

　　Original title: How to check and repair cable line faults? X-ray technology gives the answer