Concrete sprayer

Abstract

The invention discloses a concrete sprayer which comprises a vehicle chassis (1), a vehicle power system (2), and an auxiliary frame (9) connected with the vehicle chassis (1), wherein a fixed turret (3), an electronic control system (4), a hydraulic system (5), an external additive box (6), a pumping system (8), a metering system (10), an air compressor system (11) and supporting legs (13) are arranged on the auxiliary frame (9); and the upper end of the fixed turret (3) is provided with a jib system (7) in a rotary support connection manner, and a spraying device (12) is arranged on the jib system (7). The concrete sprayer has the advantages of capability of normal spraying operation in a tunnel with a small tunnel section or relatively irregular tunnel section, small labor intensity of workers, less concrete rebound and caving, good construction quality, high efficiency, easiness in control and location, and capability of rapidly self-driving during transferring among construction sites.

Description

technical field [0001] The invention relates to support construction equipment for concrete support of tunnels, mines, side slopes, etc., in particular to a concrete spraying machine. Background technique [0002] The working principle of the concrete spraying machine is to use compressed air to transport the ready-mixed mixture through the pipeline and the nozzle of the spraying machine, and spray it to the sprayed surface at high speed to condense and harden, thereby forming a concrete support layer. Shotcrete technology is widely used in various construction fields due to its simple process and economical cost. [0003] Most of the jet machines used at present are small machines, and the supporting parts are scattered and arranged. This type of jetting machine cannot effectively control the quality of concrete, and the concrete tends to rebound and slump, resulting in poor construction quality and low construction efficiency; the jetting head is operated manually, and th...

AI Technical Summary

Problems solved by technology

This type of jetting machine cannot effectively control the quality of concrete, and the concrete tends to rebound and slump, resulting in poor construction quality and low construction efficiency; the jetting head is operated manually, and the labor intensity of the workers is high. There is a lot of dust generated during spraying, and the construction environment is harsh. Affect the health of construction workers; trailers are needed to transfer, mobility is poor, and the utilization rate of equipment is low

[0004] The application number is 201020518449.4, and the patent document named wet integral concrete spraying unit discloses a spraying machine, which has the following disadvantages: 1. In the face of small tunnel sections or tunnel section spraying operations with relatively complex cross-sectional shapes, Obviously, the boom is too long, the turning radius of the nozzle is large, not flexible enough, and there are dead angles; 2. The structure is complex

[0005] The application number is 201010136199.2, which is a patent application document titled a brush-action spraying device for a concrete spraying machine, which discloses a spraying device for a concrete spraying machine, which has the following disadvantages: 1. The orientation of the spray head is jointly controlled by three motion mechanisms, so that The control of the position of the nozzle is more complicated, the positioning is more difficult, and the positioning speed is slow, and the response time is long; 2. The structure is complex and heavy, so that the weight of the spraying device to the gravity moment of the boom system accounts for a large proportion of the total moment of the boom system. Large, it has a great influence on the stress on the injection device, the boom system and even the jet chassis, which affects the strength requirements for the boom system and even the jet chassis; 3. The structure is complex and the manufacturing cost is high

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