Composite insulator manufacturing process

FIELD: electrical engineering; polymeric insulators and their manufacturing process.

SUBSTANCE: proposed composite insulator manufacturing process includes skeleton fixation in winding mechanism that rotates it about longitudinal axis at the same time moving skeleton along its axis, production of profiled band from T-section silicone rubber band by means of extruder, installation of fin in a spaced relation between turns followed by its rolling-on. Skeleton rotating and moving mechanism is inclined relative to extruder through angle equal to that of fin inclination. Fin is thickened at least on one end of base and this end is flattened in the course of rolling to fill up clearance between adjacent turns. Then part obtained is polymerized and wiring hardware is mounted thereon.

EFFECT: facilitated manufacture, improved termination of silicone finning edge.

1 cl, 2 dwg

 

The invention relates to the field of electrical engineering, namely to polymeric insulators and methods for their manufacture.

Known methods of manufacturing polymer insulators method of laying on the cylindrical base of fibrous material impregnated with synthetic resins, for example epoxy, extruded tape silicone rubber profile T-shaped section having one or more ribs, perpendicular to the base and may have longitudinal grooves on the flat reverse (back) side of the base profile [1].

The disadvantage of this method is the possibility of air pockets between adjacent turns of the profile T-shaped section and the impossibility of removing it in the process of rolling.

Closest to the proposed technical solution is the technology of manufacture of the insulator, whereby the edge of the silicone rubber is laid on the dielectric frame with pre-mounted on it the installation of valves, pre-Packed ring of triangular cross-section. This provides a smooth transition between the end surface of the armature and the cylindrical surface of the skeleton and eliminates air pockets, providing a seal at the boundary of the installation of the valve. Subsequent compacting received beading pressing roll is com allows you to get a solid fins, which is cured under polymerization technology of rubber.

Stacking ribs made of silicon rubber and the subsequent compacting received beading is done through the mechanism of rotation of the frame around the longitudinal axis and moving it along the extruder designed for the agreed profiled strips of elastic material of triangular cross-section and then profiled tape mainly T-shaped section and a rotating roller packer system [2].

The disadvantage of this solution lies in the substantial complexity of the whole process, because this technology uses two dies, one filler - for the manufacture of the triangular profile of the ring, providing a smooth transition from the flange mounting fittings to the hull, the other filler for forming the profile of the T-shaped cross section, used for styling as fins, increasing the length of the leakage path, and two rollers, each of which compacts your profile.

The purpose of this proposal is the elimination of this drawback: the simplification of the manufacture of polymer insulators with silicone fins and improving the sealing edge of the silicon fins.

To achieve this goal in the method of manufacturing a composite insulator is, includes fixing frame in a winding mechanism, a torque about its longitudinal axis while moving the frame along its axis, the receiving profiled strips of silicone rubber, mainly T-shaped section, with the aid of the extruder, laying the ribs, rolling his roller packer system, polymerization and installation installation of the valve, it is new that the stacking ribs of the T-shaped section is performed with a gap between the coils and the mechanism for rotating and moving the frame, installed relative to the extruder at an angle equal to the angle of the stacking ribs. When this edge is made thicker, at least one edge of the substrate that is aligned in the process of compacting, filling a gap between adjacent coils. Then the obtained product is polymerized, and it is mounted installation fittings.

Manufacture of composite insulator is carried out as follows. Figure 1 shows a device for manufacturing a composite insulator comprising two frequency drives: rotating the frame about its axis drive 1 and moving the frame along the longitudinal axis of the actuator 2, in which is secured the frame 3. Then made the edge of the T-shaped section 4 by means of the extruder 5, the set relative to the longitudinal axis of the frame 3 at an angle α1 equal to the angle of the stacking ribs α2that provides a more uniform distribution of the ribs of the T-shaped section. Stacking ribs of the T-shaped section on the frame 3 is performed with a gap between adjacent coils. The gap between adjacent coils can be provided with guide plates, the side walls of the tray (Transporter) or the speed of rotation and feed of the skeleton. Figure 2 shows a possible cross-section profile is obtained from the extruder. The profile has at least one edge 6 that is perpendicular to the base, and the thickening 7, at least one edge of the base. You then compacting the obtained beading roller 8, in which the material is thicker at the base of the ribs razravnivaetsya, filling a gap between adjacent coils and forcing out the air. Thus, it is a monolithic fin. Then is trimmed with rubber seats intended for installation the installation of the valve, so that the valve is subsequently mounted on the frame of its annular ledge, covered the edge of the base silicon ribs. The resulting fins polymerized under the polymerization conditions used silicone rubber. Then the frame is mounted installation the valve so that the annular protrusions closed base edge of kremniyorganika the CSOs ribs, excluding the impact of the atmosphere on the junction of the silicon fins and skeleton. To improve the isolation of the specified interface from the influence of the atmosphere installation installation of the valve is possible until the moment of polymerization or with the use of silicone sealants. This will provide a better seal between the installation of valves and silicone fins and eliminate the presence of air inclusions in the specified interface.

Sources of information

1. U.S. patent No. 588680, CL 428/60, N 01 17/50, publ. 23.03.99.

2. U.S. patent No. 5973272, CL 428/179, N 01 In 17/06, publ. 26.10.99 (prototype).

A method of manufacturing a composite insulator comprising a fixing frame in a winding mechanism, a torque about its longitudinal axis while moving the frame along its axis, the receiving profiled strips of silicone rubber, mainly T-shaped section, with the aid of the extruder, laying the ribs, rolling his roller packer system, polymerization and installation installation of the valve, characterized in that the laying on skeleton ribs of the T-shaped section is performed with a gap between the coils and the mechanism for rotating and moving the frame, installed relative to the extruder at an angle equal to the angle of the stacking ribs, and the rib is made thickening of at least one edge of the substrate that exp is universe in the process of compacting, filling a gap between neighboring turns, then it is mounted installation fittings.



 

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