Concrete pump operation techniques: 1. Concrete pump should be placed on a flat, solid ground, there must be no obstacles around, after the legs are adjusted and adjusted to maintain the body level and stability, the tire should be Wedge tight. 2. Piping laying should meet the following requirements: (1) horizontal pump into the pipe should be laid straight. (2) The vertical pipelines shall not be directly attached to the outlet of the pump. A horizontal pipe with a length of not less than 20m shall be installed at the front of the vertical pipe and a check valve shall be installed near the horizontal pipe. (3) The laying of downward sloping pipe, the output should be installed on a horizontal pipe, the length of not less than 5 times the height difference of the inclined pipe. When the inclination is larger, the exhaust valve should be installed at the top of the slope. (4) The pumping pipe should be supported and fixed. The wooden pad should be set as a buffer between the pipe and the fixed object. The pipe should not be directly connected with the steel bar or the template. The pipe and pipe should be securely connected. Pipe joints and clamps should be firmly sealed, not Po pulp. Do not install the worn pipe in the rear high pressure area. (5) Pumping pipe laying, pressure test should be carried out. Construction Safety Management: Operation Safety Technology of Concrete Pumps 3. The gravel size, cement grade and mix ratio shall meet the pump-pumpability requirements according to the factory regulations. 4. Before operation, check and confirm that the bolts of each pump unit are fastened and the protective device is fully and reliably operated. The switches, adjusting handle, handwheel, lever and cock are all in the correct position, the hydraulic system is normal and there is no leakage, the hydraulic oil conforms Provisions, mixing bucket without debris. The top grid is intact and covered. 5. Pipe wall thickness should be matched with the pump pressure, near the pump should be selected high-quality pipe. Pipe joints, sealing marrow 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 tubes, cleaning supplies, catcher and related devices. Before opening the pump, unrelated persons should leave the pipe around. 7. After start-up should be no-load operation, observe the instrumentation value of the instrument, check the pump and stirring device operation, to confirm that everything is normal before operation. Pumping should be added to the hopper IOL Qing Cheng and 03m ³ cement mortar Run pump and pipe. 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 entering the hopper concrete segregation phenomenon should be stopped pump, to be mixed and then pumped. 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 due to feed suspension was forced to suspend, the downtime must not exceed 30min. Pause time should be every 5 - lOmin (winter 3 - 5min) for 2 - 3 stroke anti-pump a positive pump movement, feed again before feeding the material should be mixed. When the stop pump time limit, should be emptying pipe. 11. Vertical pump up again after pumping into the interruption, should be carried out in the reverse push, so that distribution valve suction concrete hopper, after mixing and then positive pump. 12. Pump running, it is forbidden to hand or shovel into the hopper or grasping the distribution valve. When working on a hopper or distributor valve, shut down the motor and relieve accumulator pressure. 13. Do not adjust hydraulic system pressure. 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. The tank should be filled with fresh water, when the water turbidity and more sand, it should promptly check the treatment. 15. Do not open any delivery pipes and hydraulic pipes when pumping. Do not adjust, repair working parts. 16. During the operation, we should observe the pumping equipment and piping and find out the hidden danger should be handled promptly. Wear more than the provisions of the pipe, clamps, seals, etc. should be promptly replaced. 17. Should prevent pipe blockage. Pumping concrete should be mixed evenly to control the slump. During the pumping process, stop the pump. 18. In the event of blockage of the delivery pipe, an anti-pump operation should be carried out to return the concrete to the hopper. When the anti-pump still can not eliminate the block a few times, should be unloaded in the pump case, remove the plug to remove. 19. After work, all the concrete inside the hopper and the pipe should be output, and then pump, hopper, pipe and so on should be washed. When using compressed air to flush the pipe, the air intake should not immediately open the Court, only when the smooth discharge of concrete before the intake valve can be opened to the maximum. In the pipeline exit side of the front lOm no 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 coated with lubricating oil. All parts of the control switch, adjust the handle, hand wheel, lever, cock, etc. should be reset, the hydraulic system should be unloaded. (Editor: Pure) Further reading: Pumps Valves Pipe Fittings Exhibition Information 2016 Exhibition Information
Zinc Coating
Zinc coating is a type of protective coating that is commonly used on metal surfaces to extend their durability and prevent them from corroding or rusting. It involves the application of a thin layer of zinc onto the surface of metal parts through a number of processes, the most common of which is hot-dip galvanizing.
The benefits of zinc coating are many. It offers excellent corrosion resistance, making it ideal for outdoor applications where metal parts are exposed to harsh weather conditions. Zinc coating also provides a smooth and uniform finish, which enhances the appearance of the metal and makes it more visually appealing. In addition to this, zinc coating improves the overall performance of the metal part by increasing its resistance to wear and tear.
Zinc coating is used in a variety of industries and applications, including construction, automotive, and manufacturing. In the construction industry, it is used to protect steel structures such as bridges, buildings, and pipelines from corrosion. In the automotive industry, it is used to protect metal components such as car frames, exhaust systems, and suspension parts. In the manufacturing industry, it can be used to protect machinery and equipment parts from rust and corrosion.
In conclusion, zinc coating is a highly effective and versatile technology for protecting metal parts from corrosion and rust. Whether for outdoor or indoor applications, it offers numerous benefits in terms of performance and durability. As such, it is an essential process for enhancing the longevity and reliability of metal parts across a range of industries and applications.
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