Joint arm of cloth arm bracket and manufacturing method thereof as well as concrete conveying machine

Abstract

The invention discloses a joint arm of a cloth arm bracket and a manufacturing method thereof and also relates to a concrete conveying machine provided with the joint arm. The joint arm of the cloth arm bracket comprises a transverse plate and a vertical plate, wherein in the longitudinal direction, the transverse plate and the vertical plate extend along the same direction; in the transverse section, the transverse plate extends horizontally, and the vertical plate extends vertically; the side of the vertical plate has flanging, and the side of the vertical plate and the horizontal flanging are fixed with the transverse plate; and the transverse plate and the vertical plate are respectively provided with a composite material layer which comprises resin and fiber. The joint arm can maintain less weight while ensuring higher strength and fatigue resistance, and also can reduce the adverse effect for the joint arm caused by welding; furthermore, the joint arm provided by the invention also has damping performance and corrosion resistance, thus prolonging the service life of the joint arm.

Description

technical field [0001] The invention relates to a distribution boom technology for conveying concrete, in particular to a joint arm of a distribution boom and a manufacturing method of the joint arm, and also relates to a concrete conveying machine with the joint arm. Background technique [0002] At present, when carrying out construction operations, concrete is generally delivered by a concrete pump truck or a concrete distribution rack. In the process of conveying concrete, the concrete pump provides appropriate power to make the concrete slurry reach the predetermined place through the conveying pipeline under appropriate pressure, so as to perform concrete pouring or pouring operations at a position far away from the mixing station. The conveying pipeline is formed by connecting several conveying pipes in sequence. [0003] The conveying pipeline is generally supported by a cloth boom. Such as figure 1 As shown, this figure is a structural schematic diagram of a fabr...

AI Technical Summary

Problems solved by technology

[0006] First, there is an irreconcilable contradiction between strength and weight

In the prior art, when increasing the thickness of the steel plate to ensure the high strength of the joint arm, the increase in the thickness of the steel plate is bound to increase the weight of the joint arm, which makes the joint arm need to bear a larger moment, which is very easy to cause the cloth Overloading of the jib

Although the joint arm can be made of special metal, it will undoubtedly make the manufacturing cost of the joint arm very high, which does not meet the actual production needs

[0007] Second, there is an irreconcilable contradiction between the strength and the performance of the manufacturing process

The joint arms of the existing cloth jib frame are connected by hinges, and the connection structure needs to be obtained by welding; when high-strength steel plates are used to manufacture joint arms, due to the poor welding performance of high-strength steel plates, the fabrication and processing of joint arms will be difficult. It is very difficult and increases the production cost of the jib

Moreover, due to the poor welding performance, the welding place is very easy to crack due to fatigue, which shortens the service life of the cloth boom

[0008] Third, there is an irreconcilable contradiction between strength and fatigue resistance

When the steel plate used to make the joint arm has high strength, its fatigue resistance decreases, and the joint arm is prone to fatigue fracture, which shortens the life of the cloth joint arm

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