低烟无卤电力电缆--特殊的电线电缆的用途_Anhui Honglin Instrument Cable Co., Ltd.

Use of special wires and cables

Author：hlyb Add Time：2016-05-04 16:31:03

Use of special wires and cables 1 Low inductance cable can be divided into strong current and weak current. Here is a low inductance cable for strong current. The cable is equipped with a heat dissipation device, which is used for a new type of water-cooled low inductance cable connected between various contact welding machines, arc welding machines and pneumatic welding tongs. It has the advantages of simple and reasonable structure, large cooling water flux, wear-resistant and leakage resistant thermocouples, and will not form blockage and limit

Use of special wires and cables

1. Low inductance cable can be divided into strong current and weak current. Here is a low inductance cable for strong current. The cable is equipped with heat dissipation device, which is used for the new water-cooled low inductance cable connected between various contact welding machines, arc welding machines and pneumatic welding tongs. It has the characteristics of simple and reasonable structure, large cooling water flux, no blocking and current limiting of wear-resistant and leakage resistant thermocouples, good heat dissipation effect and long service life.

The new low inductance cable also includes a cable and a connector fixed on the cable end, and the cable is also composed of a positive cable core and a negative cable core installed in an outer rubber tube. Since this kind of low inductance cable is generally used for occasions with voltage of 25-50v and current of 7000-a, and the short-circuit conductivity of cooling water in the cable is basically negligible, the rubber hose for isolating the positive cable core and negative cable core is not used in this low inductance cable, but a core frame with spoke cross section (commonly known as "plum blossom core") is specially set, The space enclosed between the "wheel center" and the adjacent "spokes" forms a longitudinal groove in the axial direction. The longitudinal groove on the core frame is the same as the total number of positive cable cores configured by the cable. The cable part is composed of the positive cable core and negative cable core respectively placed in the longitudinal groove of the core frame and installed in the outer rubber tube. The heads of both ends of the positive cable core and the negative cable core of the silicone rubber flat cable are assembled into bundles with the same pole respectively, clamped in the cable core clamp, and then fixed on the joint. The end head of the outer rubber hose of the cable is sleeved at the tail end of the joint, and sealed with a tightening hoop sleeved outside the outer rubber hose.

2. Under the action of external factors such as bending, vibration, impact and temperature change of low-noise cable, the cable whose pulse signal is less than 5mv is called low-noise cable, also known as shockproof instrument cable. It is used for micro signal measurement in many fields such as industry, medicine, national defense and so on. There are polyethylene insulated low-noise cable, F46 insulated low-noise cable, radiation resistant low-noise cable, low capacitance low-noise cable, hydrophone cable, watertight low-noise cable and other models and specifications of cables.

The causes of noise in the cable are as follows: 1) molecular friction in the medium itself; 2) Change of cable capacitance; 3) Piezoelectric effect of cable medium; 4) The friction between conductor and medium in cable generates charge, that is, the separation of charge occurs when the contact between conductor and insulation is damaged. A thin layer of semiconducting (0.20-0.30mm thick) low-noise cable extruded on the polyethylene insulation surface has developed rapidly, and its noise value is 2-3mv. For the low-noise cable working at 400 ℃, the method of wrapping high-temperature resistant semiconducting fiber can be used to solve the problem, and its noise can reach 5mv.

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Use of special wires and cables