Stationary Pump Selection and Use Skills

1.Technical parameters of stationary pump

Stationary Pump had the following main technical parameters such as conveying displacement, export pressure, motor power and distribution valve form. According to the new national standards, these main parameters from the concrete pump model can be learned.

2. Power of electric motor（diesel engine is the same）

The motor power of concrete pump trailer is the precondition to determine the outlet pressure and the amount of conveyor. Under the condition of a certain motor power, the increase of the pressure will reduce the amount of conveyor. On the contrary, reducing the outlet pressure will increase the throughput. In order to ensure that the concrete conveying pump not only has a large amount of conveying, but also has a certain outlet pressure and economic power to match, in the design of concrete conveying pump, the constant power plunger pump is mostly used. That is, after the constant power value is selected, when the outlet pressure rises, the output displacement of the oil pump will automatically decrease to the value corresponding to the power design. If both of them want to achieve high export pressure, and want to get the purpose of large throughput. The only way is to increase the motor power. Therefore, in the new national standard, the concept of capacity index of concrete conveying pump is introduced (taking MPa·m3/h as the measurement unit). the product of the actual outlet pressure of concrete conveying pump and the actual throughput per hour are identified. The larger the value is, the larger the capacity index will be, and the larger the motor power will be. Thus, the purpose of large displacement and high lift can be realized.

Use skills of stationary pump

1. Operators and relevant equipment management personnel shall carefully read the operating instructions and master the relevant knowledge of its structural principle, operation and maintenance as well as pumping concrete operations; The operation of concrete pump should be strictly in accordance with the operating instructions. Since there is required processes for the operator to fully master the mechanical properties, the instruction manual should be prepared at random. At the same time, it should be based on the use of the manual to develop special operating points, to be able to effectively control some variable factors in the pumping technology, such as pump position, pipeline layout.
2. The ground supporting the Stationary Pump should be flat and solid; The whole machine should be placed horizontally and should not be tilted in the working process. The supporting leg should be able to support the whole machine stably and lock or fix reliably. The pump location should not only be convenient for the concrete mixing truck to enter and exit and feed to the hopper, but also be conducive to the pumping distribution pipe and reduce the pumping pressure loss. At the same time, it should be close to the pouring site and convenient for power supply and water supply.
3.  Stationary Pump should be based on the characteristics of the construction site and concrete pouring scheme for piping, piping design to check whether the horizontal conversion distance of the pipeline and concrete pump pumping distance.Piping should be as short as possible, less elbow and hose. Pipeline laying should facilitate pipeline cleaning, troubleshooting and disassembly and maintenance.When the new pipe is mixed with the old one, the new pipe should be arranged at the place with high pumping pressure. In the process of piping, a pipe layout diagram shall be drawn, and the specifications and quantities of various pipe fittings, pipe clips, elbow pipes and hoses shall be listed, and a list shall be provided.
4.  In the process of concrete pumping, with the increment of pump pressure, pumping impact will force pipe moves back and forth, it was not only the pumping pressure loss, and was the connection between pump pipe area was in a state of shock and discontinuous tension, which can lead to the pipe clamp and aprons premature damage, water mud overflow, so the pump must be fixed.
5.  After the connection of the Stationary Pump with the conveying pipe, the concrete pump shall be fully inspected in accordance with the operating instructions of the concrete pump, and the machine shall not be started for empty operation until it meets the requirements.After no-load operation for 10min, check again whether all institutions or systems work normally.
6.  During construction in hot season, it was advisable to cover the concrete conveying pipe with wet straw bag, wet cover cloth and other materials to avoid direct sunlight, so as to prevent the concrete from blocking the pipe due to the rapid loss of collapse.

   When vertical upward piping was required, with the increase of height, namely the increase of potential energy, there is trend of back flow of concrete. Therefore, horizontal pipes of a certain length should be laid between the concrete pump and the vertical piping to ensure sufficient resistance to prevent back flow of concrete. When pumping concrete in high-rise buildings, pipes shall be arranged vertically upward. At this time, the length of horizontal pipes on the ground shall not be less than 1/4 of the length of vertical pipes.If the required length of water pipe cannot be placed due to the limitation of the site, elbow pipe or hose can be used instead.
   7. During the stationary pump in the cold region in winter, appropriate insulation measures shall be taken, and the concrete conveying pipe shall be wrapped with insulation materials to prevent the concrete inside the pipe from freezing.When vertical upward piping was required, with the increase of height, namely the increase of potential energy, there is trend of back flow of concrete. Therefore, horizontal pipes of a certain length should be laid between the concrete pump and the vertical piping to ensure sufficient resistance to prevent back flow of concrete. When pumping concrete in high-rise buildings, pipes shall be arranged vertically upward. At this time, the length of horizontal pipes on the ground shall not be less than 1/4 of the length of vertical pipes. If the required length of water pipe cannot be placed due to the limitation of the site, elbow pipe or hose can be used instead.

About MINLE Machinery

MINLE Machinery had provided many types of effective and high quality concrete pump machine to over 36 countries. We are designing and manufacturing such concrete pump machines as concrete pump trailer, concrete mixer pump, truck mounted line pump, concrete mixer pump truck, concrete boom pump truck, wet shotcrete machine, etc. we are also providing professional design and fabrication service. OEM and ODM are also available.

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