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Start protective device, method and engineering machinery of hydraulic system

A hydraulic system and protection device technology, applied in the hydraulic field, can solve problems such as hydraulic pump damage, and achieve the effect of avoiding damage and eliminating potential safety hazards.

Active Publication Date: 2012-07-18
ZOOMLION HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to provide a start-up protection device, method and construction machinery of a hydraulic system, so as to solve the problem of damage to the hydraulic pump caused by forgetting to open the oil circuit of the hydraulic system after maintenance of the construction machinery in the prior art

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  • Start protective device, method and engineering machinery of hydraulic system
  • Start protective device, method and engineering machinery of hydraulic system
  • Start protective device, method and engineering machinery of hydraulic system

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Embodiment Construction

[0012] 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.

[0013] As a first aspect of the present invention, a start protection device for a hydraulic system is provided. like figure 1 and figure 2 As shown, the starting protection device includes: a starting switch 30; a first switching element 20, including an actuating unit 21 and a first contact group 22; a second switching element 10, including an actuating unit 11 and a The stop control contact group 12; the actuation unit 11 of the second switch element 10, the start switch 30 and the first contact group 22 of the first switch element 20 are connected in series; the sensor 40 is used to detect the oil passage of the hydraulic system. and control the actuating unit 21 of the first switch element 20 to be energized or de-energized, thereby controll...

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Abstract

The invention provides a start protective device, a method and engineering machinery of a hydraulic system. The start protective system comprises a start switch; a first switch element comprising an actuating unit and a first contact set; a second switch element comprising an actuating unit and a control contact set for controlling the start and stoppage of the hydraulic system, wherein the actuating unit and start switch of the second switch element are connected with the first contact set of the first switch element in series; and a sensor for detecting the on-off of an oil path of the hydraulic system, and controlling the power-on or power-off of the actuating unit of the first switch element. Through the sensor, the first switch element and the second switch element of the start protective device, the on and off state of the oil path of the hydraulic system can be detected before a hydraulic pump is started, so that the hydraulic pump can work only when the oil-path is in an on state; the damage to the hydraulic pump, caused by air suction, is avoided, and the potential safety hazard in starting is eliminated.

Description

technical field [0001] The present invention relates to the field of hydraulic pressure, and more specifically, relates to a hydraulic system startup protection device, method and engineering machinery. Background technique [0002] Many construction machines, such as rotary drilling rigs, have hydraulic systems. When repairing construction machinery, it is necessary to close the valve under the hydraulic oil tank to prevent hydraulic oil from leaking out during maintenance, resulting in waste of hydraulic oil. After the maintenance is completed, the maintenance personnel may forget to open the valve, so that when the engine is started, the hydraulic pump may burn out due to the inability to suck in the hydraulic oil. At present, construction machinery (such as rotary drilling rigs) on the market does not have a start-up protection device for the hydraulic system, and can only rely on the operator's own safety awareness to avoid the occurrence of the above situation, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B20/00
Inventor 费胜巍赵亮李昱张刊吴耀华
Owner ZOOMLION HEAVY IND CO LTD
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