High-speed grout producing and sending machine supported by stirring pumping coaxial cantilever

Abstract

The invention discloses a stirring pumping coaxial cantilever support high-speed grout producing and sending machine and relates to a stirring device. At least one impeller is arranged for stirring when the grout is pumped for sending and mixed, the impeller and the pumping impeller are arranged on the same shaft, and a despin device is arranged in a barrel. The device of the invention is characterized in that the grout producing speed is fast, the operation requirement is low, the charging speed is not controlled; the effects of grout producing and sending are good, the grout is uniform without the fish effect; the volume utilization of the barrel is increased; the use of the three-way hand-draw valve is stable; and the production cost is reduced. Actual engineering tests show that the time for producing the grout with a water-cement weight ratio of 0.5-1 after the charging process is only 10 seconds, and the grout producing time depends basically only on the charging time without the demand for charging speed. The production time of the grout with a water-cement weight ratio of 0.28:1 is about 90 seconds, as the specific gravity of the grout is large and the dry cement floats onthe grout.

Description

technical field [0001] The invention relates to a stirring device, in particular to a stirring and pumping coaxial cantilever-supported high-speed pulping and feeding machine with fast pulping and pumping capabilities. Background technique [0002] Chinese patent " 01125982.5 " discloses a kind of vortex type agitator, and centrifugal pump is arranged outside pulping barrel, and slurry is sprayed back to pulping barrel with injection pipe, produces vortex in barrel. This product uses centrifugal pumps, injection pipes, eddy currents, etc. to make slurry, so that the prepared cement slurry is uniform, high in concentration, and has no agglomeration and precipitation when the concentration reaches 55%. The disadvantages of vortex mixers and similar mixers on the market are: [0003] 1. There is no stirring device in the barrel, and with the rotation of the vortex, the added material is easy to spin into agglomerates in the barrel, and it is difficult to disperse, so the pulpi...

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Problems solved by technology

[0004] 2. The support of the centrifugal pump (such as seals or supports) is in the slurry, and the particles in the slurry are easy to enter the seal and support position, wear or block the shaft of the slurry pump, and the failure rate of this model is very high

[0005] 3. The slurry in the pulping barrel is hollow due to the rotation of the vortex, the volume utilization rate of the barrel is low, and the slurry is easily rotated out of the barrel mouth, causing the slurry to splash

[0006] 4. The device for switching the flow direction of slurry on the pulping machine-the switching valve for pulp making and discharging is a pinch valve, and the pinch tube is easy to age, deform, crack, lose elasticity and fail; when switching directions, the flow of fluid is not obvious, and there is leakage of water and slurry

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