Product structure characteristics and application scope of grouting pump

Grouting pump is the key equipment in grouting construction.

The performance and quality of the grouting pump play a decisive role in the safety, quality and efficiency of the grouting project. If the choice of grouting pump is blind and random, it may cost a lot of money and fail to achieve the expected effect, and even lead to engineering accidents. It should be taken as a warning to improve scientificity.

The grouting pump has the advantages of low energy consumption, low vibration, low noise, small volume, high efficiency, stable and reliable performance, convenient pressure and flow adjustment, and long service life. The higher pressure of the pump can be set; it can avoid unnecessary losses during the grouting process; the grouting method is to press the slurry into the cracks of the rock or soil layer and fill it with compaction. During the grouting process, new ones will be punched out. Cracks, resulting in frequent changes in grouting pressure, and sometimes grouting pressure will change sharply and sharply. The characteristics of this working condition determine the proper working performance of the grouting pump:

(1) The grouting pump should have a large adjustment range of the grouting volume. Generally, the change between the final grouting volume and the initial grouting volume is about 8 to 10 times. The final amount of grouting is small, which proves the good filling and compaction.

(2) The grouting pump should have reliable pressure control capability. Because the "filling and compaction" of grouting is bound to cause the overpressure of the grouting pump, the pump should reduce the amount of grouting in time to reduce the flow resistance of the slurry in the gap, thereby avoiding grouting fracturing and road bumps. , mechanical accidents, etc. The grouting pump preferably has the performance of automatically adjusting the amount of grouting as the grouting pressure changes.

(3) The grouting pump should be simple to operate and maintain, and safe and reliable to use. Because the grout used by the grouting pump is easy to precipitate and solidify, the grouting pump must ensure that the grouting pump does not stop in the middle of each grouting (preventive maintenance should be done before grouting). The working conditions in the mine are difficult, and the grouting pump must be reliable and absolutely explosion-proof.

The grouting pump uses compressed oil or compressed air as the power source, and uses the oil cylinder or the cylinder and the grouting cylinder to have a larger ratio of action area, so that the cylinder can generate a higher injection pressure with a smaller pressure.

The structure of the grouting pump

The working principle of the single-chamber reciprocating pump, when the crank rotates counterclockwise at the angular velocity ω, the piston moves to the right, the volume of the cavity suddenly increases, the liquid pressure in the cavity decreases, and the suction valve opens and the discharge valve closes under the action of external pressure. Under the action of the pressure difference, the conveyed liquid overcomes the resistance loss of the suction pipeline and suction valve, etc. and enters the cavity. When the crank turns 180°, the piston moves to the left, the liquid is squeezed, and the liquid pressure in the cavity increases sharply , Under the action of this pressure, the suction valve is closed and the discharge valve is closed, and the liquid in the cavity is discharged into the discharge pipeline under the action of the pressure difference. When the crank rotates continuously at an angular velocity ω, the reciprocating pump continuously sucks in and discharges liquid.

Product features of grouting pump

1. The pump has good structure, high rated output pressure, large displacement, high efficiency, easy to move and easy to use and maintain;

2. Full-featured, that is, it can inject single-component slurry or two-component slurry; it can be injected with chemical slurry or cement and other slurries; each cylinder works synchronously, the mixing ratio can be adjusted, and the mixing is uniform; and Can be used as emulsion pump, hydraulic pump, etc. for other occasions;

3. Good safety, can be used safely in places with flammable, explosive, temperature and humidity changes;

4. The parameters can be adjusted according to the different needs of customers. Meet the special requirements of different pressures, flow rates and different conveying media;

5. It can work with three cylinders or two cylinders to achieve the requirement of 4:1 or 1:1 slurry mixing ratio. The pump has high pressure and large output flow, which can meet the requirements of high-intensity injection.

Scope of application of grouting pump

The grouting pump is widely used in grouting and water blocking, filling voids, strengthening broken rock formations and other projects in mines, tunnels, water conservancy, subways, buildings, bridges and other construction sites.