S-valve assembly, pumping system and engineering machinery

Abstract

The invention relates to an S-valve assembly, a pumping system and engineering machinery. The S-valve assembly comprises a rotating shaft, a rocker arm, sleeves, first sealing pieces and glands; the rotating shaft is used for penetrating through a mounting hole of a rear wall plate of a hopper; the rocker arm is connected to the end, extending out of the hopper, of the rotating shaft; the sleevesare arranged on the rotating shaft in a sleeving mod and connected with the rotating shaft through splines; the first sealing pieces are used for sealing gaps between the rotating shaft and the sleeves and arranged on the rotating shaft in a sleeving mode; the first sealing pieces abut against the end faces of the first ends, stretching into the inner side of the hopper, of the sleeves; and the glands are used for pressing the first sealing pieces for sealing on the end faces of the first ends and pressing the first sealing pieces for sealing on the outer peripheral surface of the rotating shaft. By means of the technical scheme, the S-valve assembly, the pumping system and the engineering machinery are capable of solving the technical problem of material leakage in the hopper.

Description

technical field [0001] The present disclosure relates to the field of concrete pumping, in particular to an S valve assembly, a pumping system and construction machinery. Background technique [0002] In order to achieve continuous pumping during the pumping process of the concrete pump, it is necessary to use a distribution valve to realize steering. At present, the commonly used distributing valve in this field is the S valve, and the S valve is located in the hopper to connect the delivery cylinder and the delivery pipe. When the concrete pump is working, the rocker arm drives the rotary center shaft of the S valve to make frequent and rapid rotations at small angles, so that the S valve is connected with the two concrete cylinders in turn, so as to realize the continuous delivery of concrete. [0003] Among them, the rotary shaft of the S valve is installed on the hopper through bearings and bearing seats, and the rocker arm is connected to the part of the rotary shaft ...

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Problems solved by technology

[0003] Among them, the rotary shaft of the S valve is installed on the hopper through bearings and bearing seats, and the rocker arm is connected to the part of the rotary shaft protruding to the outside of the hopper. In actual use, the concrete material or water in the hopper can easily pass through the outer surface of the rotary shaft. It flows out to the outside of the hopper and enters the rocker arm through the gap between the rotary shaft and the rocker arm, causing rust and wear of the rotary shaft and rocker arm, affecting its service life

[0004] In the related art, in order to solve this problem, a sleeve is usually sleeved on the rotary shaft, and a seal is sleeved between the rotary shaft and the sleeve. However, the sealing effect of this seal is not ideal. It is easy to rub against the outer peripheral surface of the rotary shaft and the inner peripheral surface of the casing, resulting in serious loss of the seal itself, and the S valve still has the problem of concrete material leakage

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