Wet type shotcrete machine

Abstract

Provided is a wet type shotcrete machine. The wet type shotcrete machine comprises a rack portion, a power portion, a driving portion, a stirring machine portion, a watering device portion, a quantitative screw conveyor portion, a control portion and a spraying mechanism portion. The rack portion is a main body supporting piece, and is integrally of a frame structure, a pair of tramcar wheels which make contact with rails are arranged on the lower portion of the rack portion, a speed reducer component of the stirring machine is arranged in the middle of the upper portion of the rack portion, the watering device portion is arranged on one side of the speed reducer component, the driving portion is arranged on the connection between the watering device portion and the speed reducer component, the power portion is arranged at one end of the rack portion and is connected with the driving portion, the quantitative screw conveyor portion is arranged at the other end of the rack portion, the control portion is arranged on one side of the quantitative screw conveyor portion, and the spraying mechanism portion is arranged on the lower portion of a stirring barrel of the stirring machine portion. The wet type shotcrete machine combines a function of stirring and a function of spraying into a whole, and is small in size, convenient to move and wide in applicability.

Description

technical field [0001] The invention relates to mine geotechnical engineering construction equipment, in particular to a tidal concrete sprayer. Background technique [0002] Tidal concrete spraying machine is a kind of construction equipment widely used in underground roadway (tunnel) engineering, geotechnical engineering, municipal engineering and other fields. It uses compressed air as the power to transport the mixed material (a certain proportion of sand, stone chips, cement) mixed in a certain proportion to the sprayed surface through the pipeline to solidify and harden, thus forming a concrete support layer. Shotcrete technology has the advantages of simple process, low construction cost and wide applicability, and has played an important role in various construction fields. [0003] The development of concrete spraying machine at home and abroad: [0004] The development of concrete spraying machine is divided into two technologies, dry concrete spraying machine an...

AI Technical Summary

Problems solved by technology

(3) Low rebound rate

The dry spraying operation method has the following disadvantages: 1. The sealing structure is not good, and the dust pollution is serious; 2. The air leakage is serious, the pipe is easy to block, and the spraying efficiency is low; 3. The amount of rebound is large, and the material waste is serious; 4. The accessories are seriously worn , the loss is large, and the cost of accessories is high; 5. Cement, sand, and stone chips are manually mixed, and the dust is large; 6. The powder accelerator is manually added, and the proportion is uneven; 7. Due to air leakage, the loss of cement is large, Change the mix ratio of concrete and reduce the quality of concrete

2. Low rebound rate

However, wet concrete spraying also has the following problems: 1. The use of liquid accelerator increases the construction cost (about 8 times the cost of powder accelerator), and the liquid accelerator has a pungent smell and is easy to corrode. The body of the construction workers is easy to cause injury; 2. The structure is complex and bulky, and due to the limited space of the coal mine roadway, the site adaptability is poor; 3. The rotor wet spraying machine has serious air leakage, easy to block the pipe, and low spraying efficiency; 4. The unit price is expensive , the price of a general wet spraying unit is between 400,000 and 500,000; 5. The wet concrete spraying method needs to mix the spraying material first, so there are pre-processes of mixing, transportation, and feeding, and the construction is complicated; 6. 1. The equipment needs to be cleaned with water after each spraying operation, which increases the manpower; 7. The cost of accessories is high

[0019] To sum up, the main problems existing in the concrete spraying device of the prior art are: the problem of uneven mixing of dry spraying; the serious air leakage of the dry spraying machine and the serious pollution of dust; Severe wear and high replacement costs; dry spraying is easy to block pipes; most of the existing wet concrete spraying machines use liquid accelerators, which have the problems of high cost, strong odor and easy corrosion; wet concrete spraying machines are easy to spray The problem of blocking the spraying pipe; the problem of high cost and large volume of the wet concrete spraying machine; the problem of complicated operation of the wet concrete spraying machine and many labor hours

Images