How does a construction floor pump work?

1) Power pump. Also known as vane pump, it relies on the rotation of the impeller to produce a dynamic effect on the liquid, and continuously transmits energy to the liquid, so that the speed energy (main) and pressure energy of the liquid increase. Most of the velocity energy is then converted into pressure energy through the extrusion chamber.

All kinds of centrifugal pumps.

Axial flow pumps, mixed-flow pumps, vortex pumps, etc. all belong to this type of pump.

2) Positive displacement pumps. In a sealed workspace that contains liquids, energy is periodically transferred to the liquid by periodic changes in its volume, increasing the pressure of the liquid and forcibly discharging the liquid. Such as reciprocating piston pumps, rotary piston pumps.

Wait. 3) Other types of pumps, such as jet (jet) pumps, water ring pumps, and water hammer pumps, rely on the flowing fluid energy to transport liquids; The electromagnetic pump is in the electromagnetic force.

transporting fluids under action; Jet pumps use static and dynamic pressure when a fluid flows.

The principle of mutual conversion to suck and deliver fluids; The screw pump uses the rotational motion of the spiral open blades to increase the potential energy of the liquid.

The working principle of the pump is summarized by the construction appraisal ** published by the nine products ** network.

First, the classification of pumps.

Second, the working principle of centrifugal pump.

Such as single-stage single-suction centrifugal pumps (IS, SLS, SLW); Two-stage, double-suction centrifugal pump (SLOW) centrifugal pump. Volute pumps.

Pipeline Pumps (GDL) Single-stage pumps (IS, SLS, SLW), two-stage pumps (SLOW).

Axial flow pumps (QZ, QH, ZWL) Mixed-flow pumps (HD, HW) Vortex pumps (HW).

Positive displacement pumps, rotary lobe pumps, electric diaphragm pumps (db y, qby) steam pumps.

Gear pump (KCB).

Progressive cavity pump (g).

Water Ring Vacuum Pump (SK).

Peristaltic pumps. Special pumps.

Jet pumps. Submersible Pump (YWP).

Gas-liquid mixed pump.

The main working part of the pump is an impeller 1, on which there are a certain number of blades 2, and the impeller is fixed on the shaft 4 and is driven to rotate by the shaft; The shell 3 of pump is a volute-shaped diffusion chamber, and the shell is stationary; The suction inlet of the pump is connected with the suction pipe 8, and the discharge outlet is connected with the discharge pipe 9. Before the centrifugal pump works, the suction pipeline and the pump should first be filled with the conveyed liquid, when the impeller rotates, the blades toggle the liquid in the impeller to rotate, and the liquid will gain energy and be thrown out of the impeller. The liquid thrown out of the impeller passes through the casing flow channel, and the diffusion tube is discharged from the discharge pipe.

At the same time, a vacuum is created in the impeller, and the liquid that is sucked into the impeller is usually pressed into the impeller through the suction line under atmospheric pressure. Because the impeller rotates continuously and evenly, the liquid is continuously and evenly thrown out and inhaled.

How gear pumps work.

There is a pair of meshing gears in the pump casing, one of which is a driving gear and the other is a driven gear, which is driven by the meshing of the driving gear to rotate. There is a small gap between the gear and the pump casing. When the gear rotates along the direction indicated by the arrow shown in the figure, in the left liquid absorption cavity where the gear teeth gradually break away from meshing, the closed volume between the teeth increases, forming a local vacuum, and the liquid is sucked into the suction chamber under the action of pressure difference, with the rotation of the gear, the liquid is pushed forward by the gear between the gear and the pump casing in two ways, and is sent to the right side of the liquid discharge chamber, in the liquid discharge cavity, the two gears are gradually meshed, the volume is reduced, and the liquid between the gears is squeezed to the liquid discharge port.

The working principle of the progressive cavity pump.

A progressive cavity pump is a rotary pump that uses screws meshing with each other to suck in and discharge liquids. The rotor of a progressive cavity pump consists of an active screw (which can be one, two or three) and a driven screw. The driving screw rotates in the opposite direction from the driven screw, the threads mesh with each other, and the fluid enters through the suction inlet, and is pressurized forward by the screw shaft to the discharge outlet.

Hope it helps.

Apply security considerations.

1. The concrete pump truck can only be used for the transportation of concrete, and any other purpose (such as lifting heavy objects) is dangerous.

2. The height and distance of the pump truck boom pumping concrete are confirmed by strict calculation and experiment, and any pipe connection after the end hose or lengthening the end hose more than 3m is not allowed, and the resulting risk is borne by the operator.

3. It is forbidden to modify the pump truck without authorization that may affect the safety, including changing the safety pressure and running speed settings; Switch to a large diameter conveyor pipe or increase the wall thickness of the conveyor pipe, change the control program or line. changes to the boom and legs, etc.

4. Pump truck operators must wear safety helmets and comply with safety regulations and safety regulations on the construction site.

Support safety precautions.

1. The supporting ground must be horizontal. Otherwise it is necessary to make a horizontal supporting surface. It cannot be supported on a cavity.

2. The pump truck must be supported on a solid ground, if the maximum pressure of the outrigger is greater than the allowable pressure of the ground, the supporting plate or auxiliary square wood must be used to increase the supporting surface area.

3. When the pump truck is supported near the pit and slope, sufficient safety distance should be retained.

4. When supporting, it is necessary to ensure that the whole machine is in a horizontal state, and the maximum deflection angle of the front and rear left and right levels of the whole machine does not exceed 3 degrees.

5. When the outriggers are retracted or retracted, the range of the outrigger rotation is a dangerous area, and the personnel may be pinched within the range.

6. When supporting, all the legs must be telescopic and to the specified position (the legs are aligned with the arrows on the lugs, and the front legs are aligned with the arrows of the front legs extending their arms), otherwise there is a risk of tipping.

7. The outriggers must be supported according to the requirements to operate the boom, and the boom must be folded and placed on the main support of the boom before the legs can be collected.

8. The factors that reduce stability must immediately retract the boom, and re-support according to the requirements after elimination, and the factors that reduce stability include.

Changes in ground conditions caused by rain, snow or other water sources Ground sinking on one side of the support leg Leakage in the outrigger cylinder Safety precautions for the extension boom.

1. Only after confirming that the outriggers of the pump truck have been properly supported, can the boom be operated, and the operation boom must be carried out in the order described in the operating procedures.

2. In the event of a thunderstorm or bad weather, the boom cannot be used. The boom cannot be used in weather with winds greater than force 8.

3. When operating the boom, the whole boom should be within the operator's field of vision.

4. Be careful of the risk of electric shock when working near the high-voltage line, and ensure the safe distance between the boom and the wire.

5. The underside of the boom is a dangerous area, and there may be concrete or other parts falling and injuring people.

6. No one shall stand within the specified range of the end hose, and the end hose shall not be guided when the pump truck starts pumping, it may swing to hurt people or spray concrete and cause accidents.

The danger zone when starting the pump is the area around the end hose swinging. The area diameter is twice the length of the end hose. If the length of the end hose is up to 3 m, the diameter of the danger zone is 6 m

7. Do not bend the end hose, and the end hose should not end into the concrete.

8. If the boom has abnormal movements, press the emergency stop button immediately. It is up to a professional to find out the cause and rule it out before continuing to use it.