Plunger cylinder, pumping system swing valve mechanism and concrete pumping equipment

Abstract

The invention relates to a plunger cylinder, a pumping system swing valve mechanism and concrete pumping equipment. The plunger cylinder comprises a plunger rod, a cylinder barrel and a cylinder bottom, wherein the cylinder barrel is provided with a first end and a second end; the plunger rod is movably sleeved in an inner cavity of the cylinder barrel from the first end of the cylinder barrel and is tightly attached to the side wall of the cylinder barrel; the cylinder bottom is located at the second end of the cylinder barrel; the plunger cylinder is provided with an oil opening and a first oil channel which enables the oil opening and the inner cavity to communicate; and the plunger cylinder is further provided with a throttling oil channel, and the throttling oil channel and the first oil channel are connected between the oil opening and the inner cavity in parallel. The plunger rod can block the first oil channel while retracting under stress so that hydraulic oil of the inner cavity can flow towards the oil opening after being throttled mainly by the throttling oil channel, and then buffering of the plunger rod is achieved through throttling on the hydraulic oil; and the hydraulic oil at the oil opening is supplied to the inner cavity mainly through the first oil channel in the outward extension process of the plunger rod, and accordingly normal operation of the plunger rod is achieved.

Description

technical field [0001] The present disclosure relates to the field of engineering machinery, and in particular, to a plunger cylinder, a pumping system swing valve mechanism using the plunger cylinder, and concrete pumping equipment including the pumping system swing valve mechanism. Background technique [0002] The plunger cylinder has a wide range of applications, such as being applied to the hopper of a pump truck, so that the S pendulum valve on the hopper swings intermittently to distribute the concrete into the corresponding delivery pipe. [0003] Due to work requirements, the plunger cylinder needs to complete short-distance operation under high pressure and high speed, and is usually a single-acting cylinder, that is, it needs to be retracted under force. And when the plunger rod of the plunger oil cylinder is stressed and withdraws the cylinder barrel, the cylinder bottom of the plunger oil cylinder is greatly impacted, which affects the service life of the plunge...

AI Technical Summary

Problems solved by technology

When the plunger rod of the plunger cylinder is retracted under force, it will have a large impact on the bottom of the plunger cylinder, which will affect the service life of the plunger cylinder and reduce the working performance of the plunger cylinder.

[0004] The structure of the traditional plunger cylinder is complicated, and there are many assembly joints between the parts, which leads to the oil leakage of the plunger cylinder and its heavy weight

In addition, in order to meet the needs of the work, the processing technology and quality requirements of the plunger cylinder are also very high, resulting in high manufacturing costs

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