Nozzle for wet-spraying trolley

Abstract

The invention provides a nozzle for a wet-spraying trolley. The nozzle comprises a tapered cavity, an inlet part configured to be in a cylinder shape and arranged at the large diameter end of the cavity, a spraying port configured to be in a cylinder shape and arranged at the small-diameter end of the cavity, a plurality of first air inlets and a plurality of second air inlets; and the first air inlets and the second air inlets are circumferentially and evenly formed in the side wall of the inlet part at intervals, and the first air inlets and the second air inlets are arranged at intervals inthe axial direction. A plurality of first rifle line grooves are formed in the inner wall of the cavity, a plurality of second rifle line grooves are formed in the inner wall of the spraying port, the second rifle line grooves are smoothly connected with the first rifle line grooves, and the first rifle line grooves and the second rifle line grooves are configured to enable the compressed gas from the air inlets and the second air inlets to accelerate concrete from the inlet part, axial rotation is generated, and the concrete is evenly sprayed from the nozzle.

Description

technical field [0001] The invention belongs to the technical field of construction equipment, and in particular relates to a wet spray trolley used for building or tunnel construction, in particular to a nozzle used for the wet spray trolley. Background technique [0002] With the vigorous development of the construction and tunneling industry, the demand for concrete in engineering is increasing. During the construction process, it is usually necessary to transport concrete to remote and high work sites. In order to improve construction efficiency, pipeline pneumatic transportation and wet spraying trolleys are used. The nozzles on the wet spraying trolley are transported by pneumatic force. When the concrete passes through the nozzles, it is mixed with high-speed gas. The high-speed gas drives the concrete to be sprayed out at a high speed and uniformly, which can improve the efficiency and quality of concrete spraying construction. [0003] At present, in order to incre...

AI Technical Summary

Problems solved by technology

However, concrete is a dense fluid with particles, and when it is conveyed by air, it will clog at the nozzle

In practical engineering applications, the nozzles of wet spraying trolleys often appear clogged and suffocated, which seriously affects the safety of equipment and operators, and also seriously affects the efficiency of spraying construction

In addition, serious wear will occur on the inner wall of the nozzle, which greatly reduces the service life of the nozzle

The wear of the inner wall of the nozzle is mainly due to the friction between the sand and gravel and the inner wall when they are sprayed at high speed. Because the sand and gravel have edges and corners and the speed is high, it will cause serious wear on the inner wall and increase the injection resistance.

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