Device used for quenching shield machine hobbing cutter ring

Abstract

The invention relates to a device used for quenching a shield machine hobbing cutter ring. The upper end and the lower end of the inner edge of the cutter ring are respectively connected with heat insulation asbestos boards, the upper heat insulation asbestos board and the lower heat insulation asbestos board are matched and fixedly connected by virtue of ceramic bolts, spacers and nuts, heat resistant seal rings are arranged at joints of the heat insulation asbestos boards and the bolts. The device provided by the invention has the technical effects that heat which is contained in the cutter ring and diffuses outside can be ensured to be greatly reduced when the cutter ring is subjected to quenching and cooling owning to heat preservation effect of the heat insulation asbestos boards, good sealing effect of the heat resistant seal rings and heat insulation effect of the ceramic bolts, cooling rate of the interior of the cutter ring is lower than the cooling rate of the exterior of the cutter ring, and a quenching state cutter ring, of which the internal structure and hardness and the external structure and hardness are completely different, is obtained.

Description

technical field [0001] The invention relates to a device for quenching a cutter ring, in particular to a device for quenching a hob cutter ring of a shield machine. Background technique [0002] The shield machine is a construction machine widely used in underground engineering and tunneling in recent years. The hob is one of the commonly used knives on the cutterhead of the shield machine for tunneling, and it is mainly composed of a knife ring. When the hob is working, it mainly relies on the impact force and extrusion force generated when the hob rotates and advances to break the rock. Due to the high strength and high hardness of the mountain rock, the hob cutter ring not only bears a large radial force during the rock breaking process, but also suffers from the severe wear of the hard mineral phase in the rock, which makes the outer surface of the cutter ring severely worn And breaks often occur. [0003] In order to prolong the service life of the hob cutter ring and...

AI Technical Summary

Problems solved by technology

But, because only one bolt is used in the prior art to fix the upper and lower two insulation material plates, it is difficult to make the outer edge of the insulation material plate contact closely with the roller ring, and when the roller ring is quenched and cooled, the heat preservation effect of the insulation material plate is reduced; secondly , the bolts are made of heat-resistant steel. Due to the good thermal conductivity of steel, when the roller ring is quenched and cooled, the heat in the inner layer of the roller ring is easy to transfer outward along the bolts, which increases the cooling speed of the inner layer of the roller ring; again, There are no sealing measures for the bolt holes on the insulation material plate, which greatly reduces the insulation performance of the device, increases the cooling speed of the inner layer of the roller ring, and reduces the expected effect

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