Concrete delivery pump adjustable double-layer seal assembly

Abstract

The invention discloses an adjustable double-layer sealing assembly of a concrete conveying pump, which has a double-layer sealing of a sealing sleeve and a sealing ring, the sealing ring is located between a fixing sleeve and a stirring shaft of the concrete conveying pump, the sealing sleeve is located between the fixing sleeve and a hopper stirring seat and between the fixing sleeve and the stirring shaft, the inner circular face of the fixing sleeve is contacted with the oblique face of the sealing sleeve, an adjustable plate is provided with an oblique face which is contacted with the sealing ring, the adjustable plate is fixed on the fixing sleeve via an adjusting screw bolt, a gap is arranged between the adjustable plate and the fixing sleeve, and a sealing hoop is arranged outside the gap. The adjustable double-layer sealing assembly of the concrete conveying pump can efficiently prevent concrete grout leaking in an operating system of the stirring shaft, thereby avoiding blocking a lubricating oil passage, prolonging the service life of the operating system of the stirring shaft, and bringing convenience and fastness for maintenance and repair.

Description

Technical field: [0001] The invention belongs to the technical field of concrete conveying equipment, and in particular relates to an adjustable double-layer sealing assembly of a concrete conveying pump, which is suitable for a mixing system in a concrete conveying pump hopper. Background technique: [0002] At present, the basic structure of concrete pump mixing system is composed of stirring shaft, stirring blade, left and right half shaft, semicircular pressure plate, dustproof ring, swivel hub, friction ring, bearing seat, bearing, skeleton sealing ring, stabilizing pin, positioning circle Plate, stuffy cover, round nut, round nut with washer, felt, hydraulic motor, transparent cover, motor connection flange and so on. The seal of the stirring shaft running system adopts a single-layer seal structure - dust ring seal, and the seal material is ordinary rubber products, which have poor wear resistance and short life, and the normal use does not exceed 1000 hours at most. ...

AI Technical Summary

Problems solved by technology

The seal of the stirring shaft operation system adopts a single-layer seal structure - dust-proof ring seal, and the seal material is ordinary rubber products, which have poor wear resistance and short life, and the normal use does not exceed 1000 hours at most

Due to the small contact surface of the dust-proof ring, it is easy to wear and tear. After a period of working time, the inner ring of the dust-proof ring is worn, and the inner warp of the dust-proof ring becomes larger, resulting in friction between the concrete slurry along the mixing shaft and the dust-proof ring. The gap infiltrates into the lubricating oil chamber, lubricating oil passage, bearing chamber and even the hydraulic motor, causing blockage of the lubricating oil passage and poor oil supply, which in turn causes dry friction of various parts on the stirring half shaft, which intensifies the The wear and tear of various parts, bearings and other parts will cause scrapping. At the same time, concrete slurry can seep into the hydraulic system from the hydraulic motor, which will eventually affect the normal working performance of the entire hydraulic system, causing the concrete delivery pump to be unusable, and stop construction for repairs.

Moreover, since the whole set of stirring shafts operates in a complex environment, once a fault occurs, it is very difficult to repair and disassemble, and the maintenance time is long, causing great losses to the construction party.

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