Closed continuous secondary water adding wet shotcrete system

Abstract

The invention discloses a sealed type continuous double water adding wet shotcreting system which comprises a spray device, a screw rod feeding device, a liquid accelerating agent supply system, a spray head mixing device and a simple mechanical arm. A feeding port of the spray device is communicated with an outlet of the screw rod feeding device, the spray device is further connected with an outlet of the spray head mixing device, and an inlet of the spray head mixing device is connected with the mixture of water and liquid accelerating agents. The liquid accelerating agents are supplied by the liquid accelerating agent supply device, the output end of the liquid accelerating agent supply device is connected with one input end of a three-way device, and the other input end of the three-way device is connected with high-pressure water. The output end of the three-way device is connected with the input end of the spray head mixing device, and a water valve is arranged on a connecting pipeline of the spray head mixing device. The sealed type continuous double water adding wet shotcreting system mainly aims to overcome the applicability defect of a current wet spray technology, a novel wet spray process is provided, the wet spray effect is achieved on the basis of original damp spray, the system is controllable and adjustable, and the resilience value and dust capacity in spray construction are reduced.

Description

technical field [0001] The invention relates to a shotcrete process system, in particular to a novel closed continuous secondary water-adding wet shotcrete system, which is mainly used in shotcrete in geotechnical engineering, slope engineering and underground engineering. Background technique [0002] Shotcrete technology is widely used in the support and reinforcement of various surrounding rock roadways and slopes. At present, there are mainly two methods of preparing shotcrete, namely dry shotcrete and wet shotcrete. Dry sprayed concrete is to deliver the dry mixture (cement, aggregate and powdered quick-setting agent) to the nozzle with the help of a jetting machine driven by compressed air, and spray it to the sprayed surface after adding water. Wet sprayed concrete is to transport the wet mixture (cement, aggregate and water) to the nozzle by pump or air with the help of a jet machine, mix it with a liquid accelerator, and then spray it to the surface to be sprayed. ...

AI Technical Summary

Problems solved by technology

However, there are also many inherent defects: ①The amount of dust and rebound of the working flour is large, the working environment is harsh, and there is a pulse phenomenon and poor uniformity when spraying the material; ②The actual water-cement mass ratio is not easy to accurately control, which affects the shotcrete quality; ③ low production efficiency

Similarly, it also has many deficiencies: ①The wet shotcrete construction process is more complicated than the dry shotcrete process. Poor adaptability to water-bearing strata; ③ For construction in areas that are difficult to enter and exit, due to the large machinery, it is inconvenient to use, and it lacks flexibility for projects with small usage; ④ Wet sprayed concrete is easy to block pipes, and it is very inconvenient to clear

In the existing dry jetting machines, the design of the jetting head is too simple to meet the requirement of fully mixing water and materials

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