Key equipment in grouting construction - injection pump

Grouting pump is a 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 has blindness and randomness, it may cost a large amount of money and fail to achieve the desired effect, or even cause an engineering accident. We should take warning and improve the scientific nature.

Grouting pump structure Single cavity reciprocating pump working principle, when the crank rotates counterclockwise by the angular speed ω, the piston moves to the right, the volume of the cavity suddenly increases, the liquid pressure in the cavity decreases, the suction valve opens under the effect of external pressure and discharges When the valve is closed, the liquid being conveyed overcomes the resistance loss of the inhalation pipe and the suction valve under pressure difference and enters the cavity. When the crank rotates 180°, the piston moves to the left and the liquid is squeezed. The pressure of the liquid in the cavity increases sharply. Under this pressure, the suction valve is closed and the discharge valve is closed. The liquid in the cavity is under the effect of pressure difference. Discharge to the discharge line. When the crank rotates angular velocity ω, the reciprocating pump continuously sucks in and discharges liquid.

The pump has advanced structure, high rated output pressure, large displacement, high efficiency, easy to move, easy to use and maintain; full-featured, that can be injected single-component slurry, can also note two-component slurry; can not only chemical slurry, but also It can be used to inject cement and other slurry; all cylinders work synchronously, the mixing ratio can be adjusted, and the mixture is even; and it can be used as emulsion pump, hydraulic pump, etc., for other occasions; good safety, inflammable, explosive, temperature, Sites with large humidity changes can be safely used; parameters can be adjusted according to customers' different needs. Satisfy different pressure, flow and special requirements of different transmission media; Can work in three or two cylinders to achieve 4:1 or 1:1 slurry mixing ratio, the pump pressure is high, output flow is large, can meet high strength Injection construction.

The grouting pump should have a large adjustment range of discharge capacity, and the general grouting final amount and the grouting initial amount change about 8 to 10 times. The small amount of grouting has proved to be good for compaction. Grouting pumps should have reliable pressure control capabilities. Because the grouting "filling and compaction" will inevitably form an overpressure of the injection pump, the pump should reduce the amount of slurry discharge in time to reduce the flow resistance of the slurry in the gap, so as to avoid the occurrence of grouting and fracturing. , mechanical accidents and other situations. The grouting pump preferably has the property of automatically adjusting the amount of discharged slurry as the grouting pressure changes. Grouting pump should be easy to operate and maintain, safe and reliable. Because the slurry used by the injection pump is easy to precipitate and solidify, the injection pump must ensure that each grouting cannot be stopped halfway (preparative maintenance before grouting should be done). The working conditions under the mine are difficult. The pump must be reliable and absolutely explosion-proof.

Preparation before grouting 1. Check if the power supply of the grouting machine is normal. 2, check the motor and gear oil pump, and perform a few revolutions. 3. Turn on the pressure gauge switch and release the relief valve to adjust the pressure handwheel. 4. Put the suction pipe into clean water for testing. 5, check the motor and gear pump steering direction is correct. 6. Check whether the hydraulic block can control the reciprocating motion of the cylinder. 7, start the motor, the system pressure is adjusted to 1 ~ 2Mpa, commissioning operation for about 5 minutes (at this time the filling valve is fully open), if the normal operation, the valve on the mixer is closed, the oil pressure to the maximum required Pressure, then stop the grouting machine and prepare for formal work.

Formal grouting 1. Open mixer grouting valve and fill with water for 1 minute. 2. If everything is normal, the two suction pipes should be put into the slurry tank quickly to implement normal grouting operation. 3. After each grouting is completed, if the grouting is not continued, the two suction pipes should be immediately transferred to the clear water tank to clean the slurry in the grouting machine to prevent solidification of the slurry over time and increase unnecessary troubles. 4. After the working cylinder and inlet and exhaust valve body are cleaned, the suction pipe shall be taken out from the water, and the grouting machine shall be further started to drain the remaining slurry in the working cylinder and the intake and exhaust valve body, and then cut off the power.

Note the use of grouting machine, grouting machine should be placed as far as possible in a horizontal position, avoid tubing, suction pipe twisted, discounted, suction pipe as possible as possible, the vertical distance of not more than one meter. 2. Regularly check the fuel tank network and the oil filter, clean it, and regularly replace the hydraulic oil. It is recommended to replace the hydraulic oil once a month or so. Use hydraulic oil No.46 in summer and No.32 hydraulic oil in winter, about 45 kg per hydraulic oil change. 3, the work site should have sufficient water to facilitate work. 4, the hydraulic joints should be checked regularly and shall not be loosened. 5, the construction operator must have a certain grouting experience in order to ensure smooth construction operations. 6, the electric control box, motor and electrical appliances should be kept clean and dry, and often check the above parts of the conductor shall not be damaged to prevent leakage. 7. When carrying the grouting machine, do not have large bumps and do not bang the various parts of the machine.

Bicycle Stem

Bicycle Stem is a important separate component that connects the handlebar to the fork. The standard spinal canal and the standard straight anterior forked supramental tube are installed with a position of 28.6mm caliber. For different requirements, we can offer a custom service with different colours and two types of baking, anodised or conventional.