Cable fusion joint technology Cable intermediate joint materials

The company has passed ISO9001 quality system certification and passed the certification of the National Electric Power Industry Electrical Equipment Quality Inspection and Testing Center. The company's main cable fusionjoint, new materialspower cable accessories production and sales. Electric power is the main power source of production and life in today's society. With the continuous expansion of the scale of cities and the increasing degree of modern production, the transmission and power supply system presents the characteristics of huge power supply network, complex power supply system, many power supply links and long power supply distance. As an important connection point of the whole power supply network, the operation stability of the cable intermediate joint will directly affect the operation quality of the power supply system.
Our company mainly creates the technology ofXLPEinsulated power cableconnection, which is a kind of cable fusion joint structure, which is an international * new domestic * cable intermediate or direct connection technology. The invention aims at providing a cable fusion joint technology, wherein the cable fusion joint structure has the advantages of firm connection, high conductivity at a connection position, small radial electric field loss, small electric energy loss, high current carrying capacity, copper core fusion, cable bending and no need to worry about influence caused by dragging the cable.
Excellent quality, Shenzhen Runhe Peng Technology Development Co., Ltd. ** pursuit, quality service, Huama will make unremitting efforts! We only focus oncable accessories and high and low voltage installation engineering.
In the future, we will, as always, hold high the banner of industry serving the country, continue to develop and repay the society!
　　Cable fusion joint (HMJ)
1. Technical field
The invention relates to the technical field of cross-linked polyethylene insulated power cable connection, in particular to a cable fusion joint structure, belongs to the category of cable accessories, and is an international and new domestic cable intermediate or through connection technology.
2. Background technology
With the continuous development of social industry, the demand for power energy is also increasing, in the process of power transmission using a large number of crosslinked polyethylene insulated power cables; the so-called power cable is in the metal core insulation extrusion package winding, shielding with functional materials, sealing, in the power system line to transmit and distribute high-power special conductors, including 3.6- 1000kV various voltage levels of crosslinked polyethylene insulated power cables.
Due to the limitations of production technology, site, transportation and other factors of XLPE insulated power cables, XLPE insulated power cables generally have a length of 500~1000 meters per plate, a diameter of 3.2 meters, a width of 2.2 meters and a weight of about 3~10 tons for production, storage, transportation, etc. However, due to the city underground power grid, power station lead-out lines, industrial and mining enterprises internal power supply and river, sea underwater transmission lines have dozens of meters, hundreds of meters, several kilometers, thousands of kilometers, so it is necessary to connect each plate of XLPE insulated power cables to extend, in order to meet the requirements of design and construction. Secondly, with the development of the power grid and the transformation of the urban network, the proportion of power cables in the power grid lines is increasing day by day, and the corresponding quality of the cable body, the quality of cable installation, and the quality failure rate of cable accessories are also increasing, which reduces the reliability of power operation.
At present, the connection extension of XLPE insulated power cables is usually achieved by connecting the metal cores of two power cables by crimping or screwing the intermediate connecting tubes.However, the way of crimping or screw fastening of the intermediate connecting pipe is not firm, easy to break, abnormal, deformed, can not become concentric circles and sharp angle discharge at the connection, large air gap gap, small physical and mechanical properties, large radial electric field loss, large heat generation, seriously affecting the current carrying capacity of the power cable, and the connection construction is complicated; there is an air gap inside, partial discharge occurs and spreads and deteriorates, resulting in insulation breakdown; Moisture absorption or water ingress phenomenon, moisture or moisture respiratory effect and electrophoresis effect penetrate into the interior of the intermediate joint, the interface resistance drops sharply, resulting in surface discharge; insulation strength decreases or ages, dendritic discharge carbonization, triggering creepage breakdown and other accident phenomena.
Therefore, there is an urgent need in the power market for cable fusion joints to restore cable structures to overcome the problems described above.