Telescopic control system of crane and crane

A telescopic control and crane technology, applied in cranes, fluid pressure actuation system testing, mechanical equipment, etc., can solve problems such as vehicle vibration, loud boom back-buckling noise, uncontrollable retraction speed, etc., and achieve retraction speed. Precise control, solve the vibration of the whole vehicle, and solve the effect of large upside down sound

Pending Publication Date: 2022-04-29
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a crane telescopic control system and the crane, which solve the uncontrollable retraction speed in the prior art, the loud noise caused by the undercut of the boom and the vibration of the whole vehicle. question

Method used

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  • Telescopic control system of crane and crane
  • Telescopic control system of crane and crane
  • Telescopic control system of crane and crane

Examples

Experimental program
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Effect test

Embodiment 1

[0030] This embodiment discloses a telescopic control system for a crane. Aiming at the problems existing in the existing telescopic system, this patent provides a new telescopic control system. By grouping and controlling the telescopic balance valve group, the retractable boom can be retracted according to the operating conditions. It is divided into two modes of high-speed retraction and low-speed micro-motion retraction. At the same time, the external control pilot is used to control the oil circuit to achieve precise control of the opening of the telescopic balance valve, thereby realizing the control of the retraction speed of the boom. This application provides two telescopic control systems.

[0031] like figure 2 As shown, the first telescopic control system includes a telescopic control valve 1, a rodless chamber relief valve 2, a balance valve group 3, an oil pressure sensor 4, a telescopic oil cylinder 5, an electromagnetic reversing valve 6, and a rod chamber rel...

Embodiment 2

[0034] like image 3 As shown, the second telescopic control system mainly includes a telescopic control valve 1, a rodless chamber relief valve 2, a balance valve group 3, an oil pressure sensor 4, a telescopic oil cylinder 5, an electromagnetic reversing valve 6, and a rod chamber relief valve 7. Adjustable pressure reducing valve 8, electric proportional pressure reducing valve 9, one-way valve 10. Similarly, balance valve group 3 is composed of two or more groups of balance valves. In this embodiment, the first group of balance valves includes the first group of balance valves. A balance valve 31 , the second group of balance valves includes a second balance valve 32 and a third balance valve 33 .

[0035] The electromagnetic reversing valve 6 is used for group control of the balance valve group 3 , the X1 port controls the first balance valve 31 , and the X2 port controls the second balance valve 32 and the third balance valve 33 . Embodiment 1 Although the speed limit f...

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Abstract

The telescopic control system comprises a telescopic control valve, a balance valve group, a telescopic oil cylinder and an electromagnetic directional valve, a port A of the telescopic control valve is communicated with a rodless cavity of the telescopic oil cylinder through the balance valve group, and a port B of the telescopic control valve is communicated with a rod cavity of the telescopic oil cylinder; the balance valve group comprises at least two groups of balance valves, a port X1 and a port X2 of the balance valve group are respectively connected with one group of balance valves, and a control port X1 of the balance valve group is connected with a communication oil path between a port B of the telescopic control valve and a rod cavity of the telescopic oil cylinder; a valve port of the electromagnetic reversing valve is communicated with an X2 of the balance valve group and a communication oil path between a port B of the telescopic control valve and a rod cavity of the telescopic oil cylinder; and a port C of the electromagnetic reversing valve is communicated with a control port X2 of the balance valve group. And an adjustable pressure reducing valve is also arranged between the control port X1 and the oil path at the rod cavity end of the telescopic oil cylinder. The problems that in the prior art, the retraction speed is uncontrollable, noise is large due to the fact that a suspension arm is reversely buckled during retraction, and the whole vehicle vibrates are solved.

Description

technical field [0001] The invention relates to a telescoping control system for a crane and the crane, belonging to the technical field of construction machinery. Background technique [0002] Crane is an important equipment widely used in engineering construction. Its loading mainly includes lifting, telescopic, luffing, slewing and other actions. The requirements for hoisting are getting higher and higher, and even under certain working conditions, it is necessary to carry out telescopic operation with load to complete the hoisting task, which puts forward higher requirements for the various performances of the crane, especially the telescopic performance. [0003] At present, the telescopic system of the crane is mainly composed of telescopic cylinders, balance valves, telescopic action control valves, hydraulic oil pumps and other components. The extension and retraction of the boom is realized by using the telescopic cylinder to drive the rope row mechanism or the bolt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B11/08F15B13/02F15B13/04F15B19/00B66C23/64B66C23/88
CPCF15B11/08F15B13/02F15B13/023F15B13/022F15B13/025F15B13/027F15B13/04F15B19/005B66C23/64B66C23/88
Inventor 李超陈宗贺于传宇任印美韩龙陈志芳
Owner XUZHOU HEAVY MASCH CO LTD
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