DIN985 Nylon Insert Hexagon Lock Nut Chuangtuo Jinggong (Jiangsu) Co., LTD , https://www.chtofastener.com
First, the preparatory work before spraying concrete 1, check the concrete jet. Inspect the hopper for debris remaining in the hopper. Relax the pressing mechanism on the rubber plate, and remove the check rubber plate and rotating plate steering direction with the arc plate and the top screw. If the rotation is counterclockwise, the steering direction is correct. The jog motor checks the steering of the steel lining and rotates counterclockwise to indicate correct steering. Tighten the compression mechanism on the top of the rubber plate and the top screw on the outside of the arc plate to adjust the gap between the rubber plate and the steel backing plate so that the combination is tight and stable. Oil-water separator drains oil. Open the cut-off valve to check the air leakage condition around the rubber plate, and adjust the air pressure according to the length of the feed pipe, and blow the pipe for 2-3 minutes. No-load test run motor is normal.
2, check the spray gun. The jet operator is responsible for unloading the parts of the spray gun and checking the wear of the incoming pipe, water ring and its connecting parts, and whether the water hole is clogged or not, and the other parts that have been damaged are immediately modified and replaced.
3, check the delivery pipeline. Air supply, water supply test, wind detection, whether the water pipe leaks or runs, whether there is leakage of material in the feeding pipe, knocking on the feeding pipe to check the wear, and whether the discharge elbow is blocked.
4. Check whether the pressure gauge is flexible.
Second, the shotcrete operation process 1, shotcrete before the start of the operation, should be the first site in the spray old belt, in order to collect the rebound material, the rebound rate does not exceed 10%. Open water, open air, adjust the amount of water, keep the wind pressure not less than 0.4MPa, water pressure should be about 0.1MPa higher than the wind pressure, add water volume with the shooter's experience to control, water-cement ratio 0.4.
2. The sprayer operates the sprayer and flushes the rock face from top to bottom.
3, concrete jet power transmission, spray gunning.
4. Adjust the amount of feng shui again according to the feeding conditions to ensure that there is no dry spot on the spray surface, no runny, strong adhesion and less rebound material.
5. The sprayer sprays in sections in the order from the bottom to the top and back of the wall.
6. When sprayed, the sprayer should be sprayed vertically as far as possible. The included angle should not be less than 70 degrees.
7. When spraying, the trajectory of the nozzle should be in a spiral shape, according to the diameter of 200-300mm, a circle presses the semi-circular method to move evenly and slowly.
8. The thickness of the concrete shotcrete shall be 50-70mm at one shot, and shall be repeated in time. The interval between the double sprays shall not exceed 2 hours. Otherwise, use high pressure water to re-flush the sprayed surface.
9, should be equipped with two people, one person holding the nozzle jet, one auxiliary lighting and responsible for contact, observe the top of the security and jet quality.
Third, the concrete jet machine shutdown operation 1, after the end of the shotcrete operation, according to the first stop material, after the stoppage of water and then shut down the final off the order of operations.
2. After the spraying work is completed, remove the spray head, clean the water ring and the mortar or the material inside and outside the sprayer, and wind up the wind water pipe.
3. Clean up and collect rebound materials, and use clean materials in shifts.
4. Spraying concrete began to spray for 2 hours after curing, and core strength was measured after 28 days.
Fourth, the safety precautions for the concrete sprayer 1. For sub-spraying, the double spray should be performed after the last helium finish. If the final condensate is sprayed for one hour, spray the surface of the spray layer first. If there is an overcut or crack in the depression, it should be sprayed and then sprayed normally.
2. It is forbidden to aim the sprayer at the person.
3. During the injection process, if there is a failure such as blocking or stopping the wind and power failure, the water gate should be closed immediately, the showerhead should be placed down to prevent water from flowing into the feed pipe, and the tapping method should be used to dispose the feed pipe when handling the blocked pipe.
4, spray personnel to wear dust masks, latex gloves and glasses.
5. After the shotcrete work is completed, the spray layer will be sprayed once every 7 days, and once every 7 days, it will be sprinkled once a day for 28 days.
6. The concrete jet operator must be specially trained to be familiar with the jet's performance structure and working principle, and to be able to eliminate general malfunctions and carry out routine maintenance and maintenance.
7. The air inlet is well-sealed to prevent the air from blowing dust; the air outlet is unimpeded and the exhaust gas is discharged smoothly; the spray pipe joint is firm, well-sealed and neatly arranged.
Concrete Jet Operating Regulations and Precautions
What are the operating procedures and precautions for concrete jets? The concrete sprayer is also called concrete shotcreting machine. The Henan Fenqiang sprayer manufacturer describes in detail the operating rules and precautions of the concrete sprayer, and he hopes to help the safe operation of the concrete sprayer.