Traction driven cold extrusion diameter reduction molding machine for mineral insulated fireproof cable

Abstract

The invention relates to the technical field of cable forming, and discloses a traction driven cold extrusion diameter reduction molding machine for a mineral insulated fireproof cable. The traction driven cold extrusion diameter reduction molding machine comprises a support frame, a guiding device, an oiling device and a drawing device, wherein the guiding device, the oiling device and the drawing device are successively arranged on the support frame from top to bottom in a vertically opposite manner; the guiding device is used for supporting the cable and guiding the cable into the oiling device; the oiling device is used for applying the lubricating oil to the outer wall of the cable; and the drawing device is used for performing a drawing process on the cable to reduce the diameter ofthe cable. The traction driven cold extrusion diameter reduction molding machine for a mineral insulated fireproof cable further comprises a de-oiling and drying device disposed behind the drawing device in the moving direction of the cable. The de-oiling and drying device is used for cleaning the lubricating oil on a cable sheath and drying the cable sheath. The molding machine can reduce or avoid the tearing or cracks on the cable sheath during a cable diameter reduction process.

Description

technical field [0001] The invention relates to the technical field of cable forming, in particular to electric diameter reducing forming equipment. Background technique [0002] Power cables are cables used to transmit and distribute electric energy. Power cables are often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of cables is gradually increasing. Power cables are cable products used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels and various insulated power cables. [0003] In the existing technology, such as the cable cold extrusion compression diameter forming system developed by our company, this system has applied for a Chinese patent (publication number CN108447624). This system has some problems...

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Problems solved by technology

[0003] In the existing technology, such as the cable cold extrusion compression diameter forming system developed by our company, this system has applied for a Chinese patent (publication number CN108447624). This system has some problems in the cable drawing process. During the drawing process, due to the Due to the high friction between the drawing surface of the drawing die and the cable sheath sheath, the sheath sheath is torn and cracked during one-time drawing forming, and tiny fine lines are formed on the surface. During the bending process of the cable, at the fine lines Stress concentration is formed, and the cable sheath may be torn at the place where the stress is concentrated. Although the probability of tearing is low, once the cable sheath is torn, the entire cable can only be returned to the factory for processing, and the construction progress will be affected.

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