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Concrete pumping equipment, serial oil cylinder and stroke self-adaptive tail end compensation method thereof

A technology of connecting oil cylinders and oil cylinders, applied in the direction of fluid pressure actuating devices, etc., can solve the problems of inability to achieve intelligence and trouble.

Inactive Publication Date: 2012-01-25
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this manual method is cumbersome and cannot be intelligentized.

Method used

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  • Concrete pumping equipment, serial oil cylinder and stroke self-adaptive tail end compensation method thereof
  • Concrete pumping equipment, serial oil cylinder and stroke self-adaptive tail end compensation method thereof
  • Concrete pumping equipment, serial oil cylinder and stroke self-adaptive tail end compensation method thereof

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Embodiment Construction

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0037] The present invention cancels the external stroke compensation device in the prior art, replaces the cut-off valve in the U-shaped pipe with an electric proportional throttle valve, and controls the opening of the valve port of the electric proportional throttle valve according to the stroke feedback signal of the oil cylinder, thereby controlling The oil volume that enters or leaks out of the connecting chamber achieves the purpose of precisely controlling the stroke of the oil cylinder.

[0038] "U-shaped pipe" is a technical term in this field, which is different from the commonly understood "U-shaped pipe". It refers to the compensation of the stroke end of the two series cylinders and the replacement of the oil in the communication chambe...

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Abstract

The invention discloses concrete pumping equipment, a serial oil cylinder and a stroke self-adaptive tail end compensation method thereof; the compensation method comprises the steps that: electric proportional throttle valves are respectively arranged on at least one of a first U-shaped pipe and a second U-shaped pipe and at least one of a third U-shaped pipe and a fourth U-shaped pipe; whether the liquid oil volume of a communicating cavity of the serial oil cylinder is in a balanced state is detected, if the volume is not in the balanced state, the opening of the valve ports of the electric proportional throttle valves is controlled, so that oil is supplemented into or relieved from the communicating cavity, and the liquid oil volume of the communicating cavity is in the balanced state. In the invention, because the electric proportional throttle valves are arranged on the U-shaped pipes and the opening of the valve ports of the electric proportional throttle valves is controlled, so that the volume of the liquid oil which enters or is relieved from the communicating cavity is controlled, and the purpose of precisely controlling the stroke of the oil cylinder is achieved.

Description

technical field [0001] The invention relates to a series oil cylinder and its stroke self-adaptive end compensation method, and also relates to a concrete pumping equipment with the series oil cylinder. Background technique [0002] When the concrete pumping equipment is working, the U-shaped tube is used to achieve the stroke end compensation of the two series oil cylinders, and at the same time, the oil in the communication chamber of the two series oil cylinders is replaced. [0003] figure 1 It shows a schematic diagram of the principle of stroke end compensation performed by serial oil cylinders of a concrete pump in the prior art. Such as figure 1 As shown, the rodless chamber of the oil cylinder 10 communicates with the rodless chamber of the oil cylinder 20 to form a communication chamber, and the communication chamber communicates with the stroke compensation device 30 for oil replenishment. The oil cylinder 10 is provided with a U-shaped pipe 11 and a U-shaped p...

Claims

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Application Information

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IPC IPC(8): F15B15/00F15B15/28
CPCF15B15/2838F15B15/00F15B15/28
Inventor 裴杰赵佩珩
Owner ZOOMLION HEAVY IND CO LTD
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