(1) The concrete pump should be placed on a flat, solid ground with no obstructions around it. After lowering the outrigger and adjusting, the body should be level and stable, and the tire should be wedged tightly. A foundation pit should be kept at a distance from the edge of the foundation pit. (2) The laying of the pumping pipeline shall meet the following requirements: a. The horizontal pumping pipeline shall be laid straight; b. The vertical pumping pipeline shall not be directly attached to the output port of the pump. The length of the vertical pipeline shall be not less than 20m Of the horizontal tube, and install the check valve in the horizontal tube near the pump; c laying a downward sloping pipe, the outlet should be installed on a horizontal tube, the length of not less than 5 times the height difference of the inclined tube, Otherwise, elbows and other methods should be used to increase resistance. When the inclination is larger, the exhaust valve should be installed at the top of the slope; d. The pumping pipe should be supported and fixed, and a wooden pad should be set as a buffer between the pipe and the fixed object, Pipelines and pipelines should be securely connected; pipe joints and clamps should be securely fastened, not leaking; shall not wear the pipeline installed in the rear high-pressure zone ;. (3) Gravel diameter, cement grade and mix ratio shall be in accordance with the provisions of the factory to meet pump pumpability requirements. (4) Before operation, check and confirm the bolt fastening of each pump department, complete and reliable protective device, all parts of the control switch, adjusting handle, handwheel, control rod, cock and so on are all in the right position, the hydraulic system is normal and no leakage, hydraulic oil In line with the provisions of mixing bucket without debris, the top of the protection of the grid intact and tight. Cooling water supply is normal, water tank should be filled with water, the lubrication points should be normal lubrication. (5) Pipe wall thickness should be matched with the pumping pressure, near the pump should use high-quality pipe. Pipe joints, seals and elbows should be intact. High temperature hot sun should be used wet sacks or wet straw bags to cover the pipeline, and should be timely water cooling, insulation measures should be taken during the cold season. (6) should be equipped with cleaning pipes, cleaning supplies, catcher and related devices. Irrelevant people must leave the pipe around. (7) After start-up, run at no-load, observe the indicated value of each instrument, check the operation of pump and agitator, and confirm that everything is normal before working. Pumping should be added to the hopper 10L of water and 0.3 cement mortar pump and pipelines. (8) In pumping operations, the concrete plane in the hopper should be kept above the axis of the mixing shaft. Hopper grid shall not be filled with concrete, feed flow should be controlled in a timely manner to remove excess size of aggregates and foreign bodies, shall not be free to move the grid. (9) When the concrete entering the hopper segregation phenomenon should be stopped pump, to be stirred evenly before pumping. When the aggregate is severely separated and the mortar in the hopper is obviously insufficient, part of the aggregate should be removed and the mortar should be mixed again. (10) Pumping concrete should be continuous operation; when forced to suspend due to feed interruption, downtime shall not exceed 30min. Pause time should be every 5 ~ 10min (winter 3 ~ 5min) for 2 to 3 strokes of anti-pump - is pumping movement, feeding again before the first material should be mixed. When the stop pump time limit, should be emptying pipe. (11) When the pump is pumped vertically and interrupted again, it should be pushed backwards first, so that the concrete in the distribution valve is sucked back into the hopper and then pumped in the forward direction after being stirred. (12) When the pump is running, it is forbidden to reach into the hopper by hand or shovel or grasp the dispensing valve by hand. When working on a hopper or distributor valve, shut down the motor and relieve accumulator pressure. (13) Hydraulic system pressure should not be adjusted arbitrarily. When the oil temperature exceeds 70 ℃, should stop the pump, but still should make the mixing blades and fan operation, to be cooled and then continue to run. (14) Water tank should be filled with fresh water, when the water quality is cloudy and there is more sand, it should be promptly checked and handled. (15) Do not open any delivery pipes and hydraulic pipes when pumping; do not adjust or repair working parts. (16) During the operation, we should observe the pumping equipment and piping and find the hidden danger should be dealt with promptly. Wear more than the provisions of the pipe, clamps, seals, etc. should be promptly replaced. (17) Plumbing should be prevented. Pumping concrete should be mixed evenly to control the slump; in the pumping process, stop the pump can not stop. (18) Various meters and indicators should be monitored at any time, and any abnormalities should be promptly adjusted or dealt with. When there is blockage of the delivery pipe, anti-pump operation should be carried out to return the concrete to the hopper. When the anti-pump can not eliminate the blockage several times, the pipe should be disassembled when the pump is unloaded. (19) After the operation, all the concrete in the hopper and in the pipeline should be exported, and then the pumps, hoppers and pipes should be flushed. When flushing the pipe with compressed air, the intake valve should not open immediately, only when the concrete is discharged smoothly, the intake valve can be opened to the maximum. In the pipeline exit side of the front 10m is strictly prohibited station, and the use of metal basket, etc. out of the cleaning ball and gravel tablets. On the concrete coagulation, scrapers should be used to remove. (20) After work, the pistons on both sides should be transferred to the cleaning room and lubricated. All parts of the control switch, adjust the handle, hand wheel, lever, cock, etc. should be reset. Hydraulic system should be unloaded.
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