Long-term pressure-resistant insulating angle iron for turnout installation device

Abstract

The invention belongs to the technical field of railway turnout switching equipment installation and provides turnout installation device long-term pressure-resistant insulating angle iron. The turnout installation device long-term pressure-resistant insulating angle iron comprises a fixed iron core and a connecting iron core, wherein the fixed iron core is of a linear structure; the connecting iron core is arranged at one end of the fixed iron core and is in an obtuse angle broken line shape; a connecting hole is formed in the connecting iron core; fixing holes are formed in the two ends of the fixed iron core; cured layers are arranged on the fixed iron core and the inner walls of the two fixing holes in a mold pressing mode; and the outer sides of the cured layers are coated with plasticizing layers in an injection molding mode. According to the turnout installation device long-term pressure-resistant insulating angle iron, the affinity among the iron cores, the cured layers and the plasticizing layers can be greatly improved through the layer structure; water ingress and gas production between the two adjacent layers are avoided; electric breakdown is prevented; electrochemical reaction is eliminated; and the service life is greatly prolonged.

Description

technical field [0001] The utility model belongs to the technical field of railway turnout conversion equipment installation, in particular to a long-acting voltage-resistant insulating angle iron for a turnout installation device. Background technique [0002] During the installation of railway turnout switching equipment, it is necessary to insulate the installation device of the turnout switching equipment and the rail to maintain the work of the track circuit. Most of the existing insulation methods are to install insulation boards on the outside of the iron parts, assemble the parts or coat a layer of insulating material on the outer surface of the iron parts for insulation and isolation. However, this kind of insulation isolation has great defects: on the one hand, there are gaps and insufficient creepage distances in the assembly of insulating plates and parts, resulting in low withstand voltage of the overall structure, and insulation failure after electrical breakdo...

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Problems solved by technology

However, this kind of insulation isolation has great defects: on the one hand, there are gaps and insufficient creepage distances in the assembly of insulating plates and parts, resulting in low withstand voltage of the overall structure, and insulation failure after electrical breakdown; on the other hand, it is coated with a layer For the isolation of insulating materials, the detection of defects such as air bubbles, cracks and interlayers cannot be carried out in its key parts, and there are also insulation failures and consequences after electrical breakdown

[0003] For the insulating angle iron disclosed in Chinese Patent Application No. 200720150317.9, there are the following problems: the thermal expansion coefficients of the iron core, the insulating layer and the adhesive material are different, and the adhesive cracks at the junction of the insulating layer at low temperature, and the freeze-thaw effect is obvious , insulation failure after electrical breakdown; adhesive fracture elongation is low, under the action of impact external force, the adhesive at the junction of the insulating layer cracks, and the insulation fails after electrical breakdown; a large number of air bubbles are incorporated in the adhesive preparation and bonding production process , electric shock partial discharge forms a cumulative effect, leading to electrical breakdown and insulation failure; bonding requires deep grinding of the surface of the iron core and the bonding surface of the insulating layer, which not only has high processing costs and is not suitable for mass production, but also causes the surface of the iron core to lose Anti-corrosion layer, corrosion derivatives expand after entering water, destroying the dielectric strength and mechanical strength of the insulation, resulting in insulation failure

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