A wear-resistant cutting ring

Abstract

The invention discloses a wear-resistant cutting ring, which comprises a ring-shaped steel matrix and a wear-resistant ring embedded in the ring-shaped steel matrix. The working end surface of the steel matrix is ​​flush with the working end surface of the wear-resistant ring. The wear-resistant ring is spliced ​​by several fan-shaped annular wear-resistant units. The cross-section of the wear-resistant unit is dovetail-shaped. The steel base is provided with an annular dovetail groove matching the wear-resistant ring. The dovetail groove is provided with a housing A single wear-resistant unit enters the gap; the wear-resistant rings are provided with several groups, and several groups of wear-resistant rings are arranged concentrically. The cutting ring of the present invention has simple processing technology and obvious improvement in wear resistance, thereby ensuring good sealing performance and prolonging service life.

Description

technical field [0001] The invention relates to the technology of concrete pumping equipment, in particular to a wear-resistant cutting ring. Background technique [0002] The cutting ring is an important part of the distribution valve of the concrete pumping equipment, and it is also a consumable part. Its wear resistance will directly affect the working reliability of the concrete pumping equipment. The moving part S tube is driven by the swing cylinder, and the cutting ring swings with the S tube close to the spectacle plate. The working end surface of the cutting ring and the cutting surface of the spectacle plate form a sliding friction pair, and the wear and tear is very severe during the working process. Therefore, the cutting ring The working end face must have high wear resistance. The basic structural composition of the cutting ring usually includes a ring-shaped steel base, a first wear-resistant surfacing layer on the outer edge of the ring-shaped steel base, a ...

AI Technical Summary

Problems solved by technology

[0003] The wear-resistant rings commonly used in the prior art mostly adopt integral and single-ring splicing structures. Regarding the integral structure wear-resistant ring, it does have good sealing performance, but the integrated pressing and sintering process is complicated. In order to ensure the machining accuracy, when sintering The remaining machining allowance will inevitably increase the amount of subsequent grinding

In addition, during the cooling process of components after high-temperature forming, there will be accumulation of internal stress. The larger the size of the component, the greater the accumulated internal stress. prone to cracking

Regarding the wear-resistant ring with a single-ring splicing structure, the splicing units that make up the wear-resistant ring include fan-shaped wear-resistant units. The fan-shaped wear-resistant units are easy to manufacture, but the joints of two adjacent wear-resistant units are easy to be worn and produce small cracks. Small cracks increase in depth and continue to expand radially along the cutting ring until they completely split the joint of the wear-resistant unit, resulting in poor sealing and affecting the service life of the cutting ring

In order to solve the problems in the above-mentioned solutions, an improved solution has been proposed in the prior art. The wear-resistant unit adopts a T-shaped or Z-shaped instead of a fan-shaped ring. Although the T-shaped or Z-shaped wear-resistant unit can solve the sealing problem, the The processing technology is complicated and the cost is high

[0004] Therefore, there is a technical problem that it is difficult to unify high wear resistance, ease of processing, and low cost in the wear-resistant ring in the prior art

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