Conveying bent pipe, concrete conveyer and manufacturing method of same

Abstract

The invention discloses a conveying bent pipe, a concrete conveyer and a manufacturing method of the conveying bent pipe. The disclosed sequentially comprises an inner pipe, an outer pipe and a filling layer, and the outer pipe at least comprises two supporting pipes which are sequentially connected; the outer pipe of the conveying bent pipe has a split type structure and comprises two or more than two supporting pipes, thereby reducing the cost of the conveying bent pipe under the condition that the wearing resistance, the strength, the high toughness and the impact resistance are ensured. In an optimized technical scheme, the inner pipe and outer pipe are fixed by an adhesive layer to transfer the acting force of the inner pipe to the outer pipe, the supporting and protecting function of the inner pipe by the outer pipe is ensured, and safety of the conveying bent pipe can be increased. Because the inner pipe and the outer pipe can be mutually positioned by matching with an inner convex body and an inner notch, the manufacturing method of the conveying bent pipe not only can simplify a manufacturing technology in a conveying bent pipe manufacturing process, but also can reduce auxiliary mechanisms and reduce the manufacturing cost of the conveying bent pipe.

Description

technical field [0001] The invention relates to a wear-resistant and pressure-resistant conveying pipe technology, in particular to a conveying bend, a concrete conveying machine with the conveying bend, and a manufacturing method of the conveying bend. Background technique [0002] At present, during construction work, concrete is generally transported to a predetermined location by appropriate construction machinery to implement the predetermined work. In the process of conveying concrete, the concrete slurry reaches the predetermined location through the conveying pipe under the action of appropriate pressure, so as to carry out the concrete pouring or pouring operation at the location far from the mixing station. [0003] In the process of conveying concrete, on the one hand, the inner wall of the conveying pipe has to withstand the continuous erosion and wear caused by the flow of concrete mud; When conveying concrete, the conveying pipe is subjected to higher pressure...

AI Technical Summary

Problems solved by technology

However, during use, the amount of wear of each part of the inner tube 110 is not the same. Therefore, after using for a period of time, when the outer arc part of the inner tube 110 is worn through, a thick wear-resistant material will remain on the inner arc part, thereby The wear-resistant material for making the inner pipe cannot be fully utilized, resulting in a waste of wear-resistant material; and because the cost of the wear-resistant material for making the inner pipe is relatively high, this further leads to an increase in the use cost of the elbow

[0009] 3. The filling layer 130 between the inner tube 110 and the outer tube 120 can only support the inner tube 110, and the filling layer 130 itself has no wear resistance or very low wear resistance; When 110 wears unevenly and the outer arc part of the inner pipe 110 wears through, under the impact of concrete slurry, the inner arc part will be separated from the filling layer 130, thereby falling into the elbow, causing the elbow to be blocked and affecting the concrete. Conveying; when conveying concrete at high pressure, the blockage of the elbow will cause serious accidents. Therefore, there are serious safety hazards in the above-mentioned elbow

[0010] 4. The annular space between the inner pipe 110 and the outer pipe 120 is filled with concrete to form the filling layer 130. The weight of the filling layer 130 is relatively large, which will increase the weight of the concrete conveying pipeline, easily increase the difficulty of conveying pipe layout, and increase Concrete jib or placing boom load capacity

[0011] In addition, the manufacturing process of the above-mentioned bent pipe requires a centering auxiliary mechanism with an expansion function to position the outer pipe 120 and the inner pipe 110, and a specific injection mechanism is required to inject concrete into the outer pipe 120 and the inner pipe 110 through the filling port 111 of the inner pipe 110. In the annular space between, the filling layer 130 is formed, therefore, there is a defect that the installation process is complicated and the manufacturing cost is high

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