Vibration anti-blocking device and method for pneumatic conveying of concrete mortar

Abstract

The invention discloses a vibration anti-blocking method and device for pneumatic conveying of concrete mortar. The device comprises material conveying hoses, semicircular groove support pipes, hoops,pneumatic vibration devices, connecting flanges, tripod elastic vibration devices and extension springs. The hoops are distributed in the axial direction of the material conveying hoses. The materialconveying hoses are fixed in the semicircular groove support pipes. One tripod elastic vibration device is arranged at each hoop, and the extension springs hang the semicircular groove support pipesthrough the tripod elastic vibration devices and the hoops so as to enlarge the vibration propagation distance and adjust the vibration frequency and amplitude. The two ends of each connecting flangeare connected with the two semicircular groove support pipes, the upper portions of the connecting flanges are connected with the pneumatic vibration devices, the pneumatic vibration devices are connected with gas pipes and vibrate after high-pressure gas is introduced, a material adhered to the inner walls of the conveying hoses is stripped under the action of vibration, and the pipe blocking prevention is achieved. The vibration anti-blocking method and device have the beneficial effects that the vibration wave propagation distance is far, and the laying is convenient; the vibration frequency is adjusted through the spring rigidity to enhance the stripping effect of the adhered material; and the vibration of the pneumatic vibration devices and the material conveying process are synchronized to realize the real-time pipe anti-blocking.

Description

technical field [0001] The invention relates to the technical field of conveying mortar concrete, in particular to a vibration preventing device and method for pneumatically conveying concrete mortar. Background technique [0002] Concrete reinforcement plays an important role in the fields of construction engineering, mining engineering and even decoration engineering. It only needs to mix cement, sand, stone, etc. with water in advance, and then spray it directly to the target position after transporting a certain distance. The strength of the sprayed mortar concrete High, uniform distribution, the whole equipment process is simple, easy to operate. At present, concrete is usually conveyed by pumping, that is, the hydraulic power is used to convey the concrete for a certain distance through the conveying cylinder. This method has considerable requirements for the precise proportioning of materials and the cleaning of residues. For this reason, high-pressure gas delivery i...

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Problems solved by technology

Although this method solves the blockage of the pipeline to a certain extent, it still faces problems: on the one hand, the cement itself has strong adhesion, and the cement slurry adhered to the pipe wall will gradually increase during the transportation process, causing concrete segregation. Afterwards, the cement slurry adhering to the pipe wall is difficult to completely clean up due to wind pressure

However, in view of the fact that the stiffness of the feeding pipe is directly proportional to the propagation distance of the vibration wave and inversely proportional to the vibration effect, the vibration loss caused by placing the feeding pipe on the ground is fast and serious, and the realization of the above-mentioned method of vibrating the anti-blocking pipe feeding is faced with The following difficulties: ① How to combine the propagation distance of the vibration wave and the vibration effect: the use of a flexible hose with a low rigidity for the material delivery pipe is convenient for material stripping, but it is not conducive to vibration transmission, while the hard pipe with high rigidity is just the opposite, and a large amount of vibration is required. The source supplements the propagation of the vibration wave and improves the effect of material stripping

② How to effectively use the energy brought by vibration: the feeding pipe is placed on the ground, its vibration frequency and amplitude are greatly reduced, the energy brought by the vibration is seriously dissipated, and the effect of peeling off the adhered materials through vibration is also significantly reduced, preventing blockage The effect will not be ideal

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