X-ray machine high-voltage cable function introduction:
The high-voltage cable is connected to the high-voltage generator and the X-ray tube head in the large and medium-sized X-ray machine. The function is to send the high voltage output by the high voltage generator to the two poles of the X-ray tube, and send the heating voltage of the filament to the filament of the X-ray tube.
The structure of high-voltage cable: According to the arrangement of the concentric lines, there are two types of coaxial (concentric circle) and non-coaxial (non-concentric circle).
(1) Conductive core wire
The innermost layer of high-voltage cables. Each core wire is composed of multiple strands of fine copper wire and is covered with insulation. Insulation requirements: withstand 50Hz, 1000V alternating current test for 5min without breakdown. Two hearts are exclusively for single focus X-ray tube, three hearts are exclusively for double focus X-ray tube. (There is insulation between the core wires)
(2) High-voltage insulation layer
Outside the core wire, it is the main insulation layer of high-voltage cables, made of rubber and chemical materials, with a thickness between 4.5-13 mm. It has good mechanical strength and toughness, can be bent within a certain range, and the pressure resistance is generally 50-200KV.
(3) Semiconductor layer
Close to the insulating layer, made of semiconductor material and rubber, gray-black, 1-1.5mm thick. The function is to eliminate the electrostatic field between the outer surface of the insulating layer and the metal shielding layer.
(4) Metal shield
It is braided with tinned copper wire with a diameter not greater than 0.3, with a braided density of not less than 50%, or wrapped with tinned copper wire mesh tape overlapping, tightly attached to the semiconductor layer, and welded to the high voltage plug horn at both ends of the cable , Grounded through the fixing ring. The function of the metal shield is to prevent electric shock to the operator or patient when the high-voltage cable breaks down, so as to ensure personal safety.
(5) Protection layer
The outermost layer, made of more plastic, is thought to be woven with black veil and vinylon thread. The role is to strengthen the mechanical protection of the cable, reduce external damage, and prevent harmful gases, oil and ultraviolet rays from harming the cable.
Precautions for using high-voltage cables:
Prevent excessive bending. The bending radius should not be less than 5-8 times the cable diameter to avoid cracks and reduce the insulation strength. Normally, keep the cable dry and clean to avoid the erosion of oil, moisture and harmful gases, so as to avoid the aging of rubber.
There are two types of NEWHEEK high-voltage cables: 75KV and 90KV. The 75KV high-voltage cable can bear 125KV at both ends, and the 90KV high-voltage cable can bear 150K at both ends. If you have any requirements, please contact us.