Three-cutting crushing pump

Abstract

The invention relates to a three-cutting crushing pump. A pump shaft is supported in a spindle box through a bearing. One end of the pump shaft extends into a pump body inner cavity sealed by a frontpump cover and a rear pump cover, and is connected with an impeller in the pump body inner cavity. The crushing pump is characterized in that the front pump cover is connected with a suction pipe communicating with the pump body inner cavity through a front pump cover inner hole through a screw; one end of the pump shaft is sleeved and fixedly connected with a cutting wheel through a key and locking of a pressure plate and screws; the cutting wheel is externally provided with a cutting sleeve embedded in the front pump cover inner hole; the end, located in the inner side of the cutting wheel,of the pump shaft is sleeved with a grid plate which is in clearance fit with the tangent plane of the inner side of the cutting wheel; a cutter base arranged around the periphery of the suction pipeis arranged on the suction pipe; a cutter arranged in the radial direction of the suction pipe is connected into the cutter base in a penetrating mode; the side, facing the pipe orifice side of the suction pipe, of the cutter and / or the side, facing the front pump cover, of the cutter are / is provided with cutting edges; and the side, facing the front pump cover, of the cutter is in clearance fit with the outer side wedge surface of the cutting wheel. The crushing pump is simple in structure, stable in operation, good in cutting effect, high in efficiency and low in failure rate.

Description

technical field [0001] The invention belongs to the technical field of industrial water pumps, and mainly relates to a three-cut crushing pump. Background technique [0002] PTA is one of the important bulk organic raw materials, widely used in various aspects of the national economy such as chemical fiber, light industry, electronics, construction, etc. The application of PTA is relatively concentrated. More than 90% of the PTA in the world is used to produce polyethylene terephthalate (PET, polyester for short), and other parts are used as polytrimethylene terephthalate (PTT) and polyethylene terephthalate. Raw material for butylene phthalate (PBT) and other products. my country's polyester output ranks first in the world, and it is a veritable polyester powerhouse. In the polyester industry, the demand for crushing pumps for conveying slurry and chopping slurry is increasing, and it is required that the pump must run stably, have a low failure rate, and be easy and quic...

AI Technical Summary

Problems solved by technology

[0003] Because the conveying medium contains acetic acid and polyester, it is very easy to form small particles and fibers entangled and blocked in the crushing pump and pipeline.

The existing structure of the crushing pump is that the outer circle of the cutting wheel is used in conjunction with the sheath, and the cut medium enters the pump impeller through the grid plate, and the cutting efficiency is low.

[0004] Moreover, during the operation of the water pump, the particle fibers in the long-term operation medium often accumulate and scale, causing the cutting wheel, the sheath and the grid plate to wear or lock up, resulting in vibration or increased shaft power or even parking, which affects the operating efficiency and service life. The wheel, sheath and grid plate are also the parts with the most faults during operation

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