Composite joint for concrete pump truck boom

Abstract

The invention relates to a composite joint for a concrete pump truck boom and belongs to the technical field of concrete pump truck boom connection. The joint is of a composite sandwich structure and comprises a composite skin, a core material and a metal tenon, wherein the metal tenon is embedded in the core material, one end surface of the metal tenon is flush with the end surface of the core material, and the composite skin is positioned outside the core material and the metal tenon; the core material performs a shaping function, and the metal tenon and the composite skin are used as main bearing parts. According to the joint, higher structural efficiency can be obtained at lower mass cost to an utmost degree through the structure and size variation of a resin matrix composite, the core material and the tenon.

Description

technical field [0001] The invention relates to a composite material joint for a concrete pump truck boom, belonging to the technical field of concrete pump truck boom connection. Background technique [0002] Concrete pump truck is a special machine for conveying and pouring concrete. It can continuously convey concrete along the pipeline to the pouring site, and gradually becomes an indispensable key equipment in building construction. At present, the pump truck jib commonly used in the market is generally composed of 4-arm sections to 6-arm sections connected end-to-end in sequence. The boom part stretches greatly during work. It is a cantilever beam structure in mechanics, and the force is more complicated. The connection of the composite material jib section structure It is a great test. [0003] Due to the high specific strength and specific stiffness characteristics of composite materials, it is a light-weight and high-efficiency material. There have been exploration...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, composite materials are generally used to directly connect with bolts, or in order to improve local strength, composite materials are used to embed metal bushings in the connection position, and then connected with bolts. The fiber damage is serious, which reduces the load-bearing effect; (2) Because the composite material is partially damaged during processing, local delamination damage is prone to occur

The latter (1) the positioning of the embedded position of the metal bushing is inaccurate, (2) when carrying a large force, it may be damaged due to insufficient local material strength, and the bearing capacity is lower than that of the present invention

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