Hydraulic bidirectional lock and crane with same

A hydraulic two-way lock, the same technology, applied in the direction of cranes, mechanical equipment, fluid pressure actuators, etc., can solve problems such as rollover accidents, deformation of vertical cylinders, and affecting the service life of vertical cylinders

Inactive Publication Date: 2011-04-06
XUZHOU HEAVY MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, under the long-term action of high temperature in the vertical oil cylinder, the hydraulic oil in the oil cylinder will expand, resulting in an increase in the pressure in the cylinder. At this time, the ordinary hydraulic two-way lock still locks the oil in the vertical oil cylinder. The pressure can easily lead to failures such as deformation of the vertical oil cylinder, seal failure, etc., which will not only affect the service life of the vertical oil cylinder, but also cause the crane to stand unstable and even cause rollover accidents

Method used

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  • Hydraulic bidirectional lock and crane with same
  • Hydraulic bidirectional lock and crane with same
  • Hydraulic bidirectional lock and crane with same

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Embodiment Construction

[0036] The core of the present invention is to add a relief valve on the basis of the ordinary hydraulic two-way lock to make it have a pressure relief protection function. When the pressure of the locked cylinder exceeds the set value, the excess pressure oil can be discharged to make the oil cylinder The pressure is always kept at a safe level, thus playing a dual role of locking and protecting the cylinder.

[0037] Another core of the present invention is to provide a crane equipped with the above-mentioned hydraulic two-way lock.

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The terms "first, second" and the like in this article are only for convenience of description, to distinguish different components with the same name, and do not indicate a sequence or primar...

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Abstract

The invention discloses a hydraulic bidirectional lock comprising a first one-way valve and a second one-way valve. An oil way of the second one-way valve is connected in parallel with an overflowing valve, an oil inlet of the overflowing valve is communicated with an oil outlet of the second one-way valve, and the oil outlet of the overflowing valve is communicated with an oil inlet of the second one-way valve. The hydraulic bidirectional lock has the functions of pressure release and protection, can discharge residential pressure oil when the pressure of a locked oil cylinder exceeds a set value so as to constantly keep the pressure in the oil cylinder at a safe level and take the dual action of locking and protecting the oil cylinder. The invention also discloses a crane provided with the hydraulic bidirectional lock.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a hydraulic two-way lock applied to a vertical oil cylinder of a crane leg. The invention also relates to a crane provided with said hydraulic two-way lock. Background technique [0002] A crane is a kind of engineering machinery that uses the boom to lift heavy objects. It relies on the rotation of the turntable to transfer the heavy objects from one position to another to complete the work task. Under the premise of providing a large support span for the crane when it is working, it can improve its lifting characteristics without reducing the maneuverability of the crane. [0003] The outrigger is a support structure installed on the crane that can be folded or retracted. Under the action of the hydraulic cylinder of the crane, it can swing to a position perpendicular to the longitudinal axis of the frame or at a certain angle. It can be divided into frog-type ou...

Claims

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Application Information

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IPC IPC(8): F15B13/01B66C23/80
Inventor 史飞刘东宏曹培雷
Owner XUZHOU HEAVY MASCH CO LTD
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