Hydraulic cylinder and pumping mechanism

Abstract

The invention discloses a hydraulic cylinder and a pumping mechanism. The hydraulic cylinder comprises a cylinder body, and a piston rod and cylinder piston which are arranged in the cylinder body, wherein one end of the end cover of the tail of the hydraulic cylinder, which is close to a rodless cavity, is provided with a first magnet, one end of the cylinder, which is close to the rodless cavity, is provided with a second magnet, the position of first magnet is opposite to the position of the second magnet, under the first state, the opposite ends of the first magnet and second magnet are the same poles, when the piston of the cylinder moves, a preset distance is remained between the piston and the end cover of the tail of the cylinder, the preset distance is smaller than the magnetic force action distance of the two magnets, under the second state, the magnetism of any one of the first magnet and the second magnet can be converted, and the piston of the cylinder can move to the bottom part of the rodless cavity of the hydraulic cylinder. The concrete pumping mechanism with the hydraulic cylinder has the advantages that the structure is simpler, the occupied area is small, the buffer effect is good, and the concrete removal of the piston is easy.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a hydraulic oil cylinder. The present invention also relates to a pumping mechanism with the above-mentioned hydraulic cylinder. Background technique [0002] Concrete pumping equipment is a machine that uses pressure to continuously transport concrete along pipelines. It is mainly used in house construction, bridge and tunnel construction, etc. It is a commonly used mechanical equipment in construction machinery. Common concrete pumping equipment includes concrete pump trucks. , tow pump, etc. Concrete pumping equipment usually includes concrete pumping mechanism, conveying pipe and so on. [0003] figure 1 It is a structural schematic diagram of a typical concrete pumping mechanism in the prior art. [0004] The concrete pumping mechanism usually includes a main oil cylinder 1', a delivery cylinder 2', and a water tank 3'. The water tank 3' is arranged between...

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Problems solved by technology

[0009] With the concrete pumping mechanism of this structure, when the concrete piston is withdrawn, the main cylinder piston 5' cannot be safely and reliably returned to the bottom of the rodless chamber, which makes it difficult to disassemble and replace the concrete piston.

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