Impact resistant glasses plate and cutting ring for concrete pump

Abstract

The invention discloses an impact resistant glasses plate and a cutting ring for a concrete pump. The impact resistant glasses plate comprises a body, wherein an opening is formed in the body, a groove is formed in one side of the body, a plurality of hard alloy blocks are brazed in the groove, at least one part of hard alloy blocks are spliced so as to form a hard alloy circular ring, the plurality of hard alloy blocks which are spliced so as to form the hard alloy circular ring include T-shaped hard alloy blocks which are located on the outer side of the hard alloy circular ring and are integrally in a T shape and trapezoidal hard alloy blocks which are located on the inner side of the hard alloy circular ring and are integrally in a trapezoidal shape, the T-shaped hard alloy blocks andthe trapezoidal hard alloy blocks are distributed in a staggered mode, the horizontal sides of the T-shaped hard alloy blocks are connected so as to form an outer ring of the hard alloy circular ring,the vertical sides of the T-shaped hard alloy blocks are in an inverted trapezoidal shape and are inserted between the waists of two adjacent trapezoidal hard alloy blocks, and the lower bottoms of the trapezoidal hard alloy blocks are connected with the upper bottoms of the vertical sides of the T-shaped hard alloy blocks so as to form an inner edge of the hard alloy circular ring. The impact resistant glasses plate has the advantages of good structural stability, impact resistance and easiness in manufacturing.

Description

technical field [0001] The invention belongs to the technical field of concrete pumping machinery, and in particular relates to an impact-resistant spectacle plate and a cutting ring for concrete pumps. Background technique [0002] The spectacle plate and cutting ring are the key vulnerable parts of the concrete pump. The spectacle plate is installed on the back wall of the hopper, and there are generally two openings on it, which are respectively connected to the delivery cylinder; the cutting ring is installed on the S valve. It is provided with 1 opening. During the pumping operation, the S valve swings, and the openings of the cutting ring communicate with the openings of the spectacle plate alternately. During the pumping process, there is surface contact between the spectacle plate and the cutting ring, and there is sand and sand between the spectacle plate and the cutting ring. Performance, sealing and service life have always been important indicators affecting th...

AI Technical Summary

Problems solved by technology

The main problem of this structure is that the brazing stress of the whole ring hard alloy is large, the virtual welding is serious, and it is easy to collapse during use; secondly, the surfacing layer is heated twice, and the hardness and wear resistance of the surfacing layer decrease. Obviously, the surfacing layer is worn out early, the body is hollowed out, and the alloy ring is exposed to brittle fracture and fails.

[0004] There are also wear-resistant plates and wear-resistant rings with brazed double-ring or multi-ring hard alloy structures on the market, but their structures are complex and the welding process is poor.

For example, during the welding and assembly process, workers tend to confuse the inner and outer ring cemented carbide blocks, which affects the assembly time and production efficiency. Due to improper assembly, problems such as dislocation of the alloy and uneven weld seams are prone to occur during the high-temperature brazing process. Seriously affect product quality and production pass rate

In addition, the wear-resistant plate and wear-resistant ring of the double-ring (multi-ring) hard alloy structure has added a full circle of welds at the weakest place. Due to the poor wettability of the hard alloy, the surface needs to be polished and ground. , and the strength and reliability of the weld are worse than that of cemented carbide and carbon steel. Therefore, the use of double-ring (multi-ring) cemented carbide structure not only increases the processing cost of the alloy, but also reduces the reliability of the wear-resistant plate and wear-resistant ring. Sex, resulting in a decline in the welding pass rate

In addition, in the cemented carbide ring formed by brazing, the overall shape of each cemented carbide block is rectangular, and the welds between the cemented carbide blocks are distributed along the radial direction of the opening. During the pumping operation, the S valve Swing, the openings of the cutting ring are alternately connected with the openings of the spectacle plate, the hard alloy ring has to bear a great lateral (radial) impact force, and because the hard alloy blocks that make up the hard alloy ring The welds between the cemented carbide blocks are distributed along the radial direction, and there is no interlocking effect between the cemented carbide blocks, so it is easy to cause collapse due to impact

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