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Crane telescoping control device

A telescopic control and crane technology, which is applied in the direction of cranes, fluid pressure actuating devices, mechanical equipment, etc., can solve problems such as failure to work normally, failure of normal telescopic or recovery of the boom, and impact on the safety of crane operations, so as to save manpower and the effect of input cost, small changes, and safety of maintenance personnel

Pending Publication Date: 2018-07-24
ANHUI LIUGONG CRANE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, because there is no emergency solution in the prior art, once the solenoid valve of the control valve 1a is blocked by pollutants or the electrical circuit is damaged, leakage, corrosion of the solenoid valve itself cause the control valve to lose its function, the cylinder of the telescopic oil cylinder 4a will Pin 3a and arm pin 2a will not work normally, and the boom will not be able to be retracted or retracted normally, which will seriously affect the safety of the crane operation

Method used

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  • Crane telescoping control device
  • Crane telescoping control device
  • Crane telescoping control device

Examples

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Embodiment Construction

[0015] Such as Figures 2 to 3 shown

[0016] The control device includes an emergency control valve group 1 , and the emergency control valve group 1 includes a first electromagnetic reversing valve 11 and a second electromagnetic reversing valve 12 .

[0017] The first electromagnetic reversing valve 11 includes oil port P1, oil port T1, oil port A1 and oil port B1. The oil port P1 of the first electromagnetic reversing valve 11 is connected with the oil circuit of the telescopic oil cylinder 4. The first electromagnetic reversing valve The oil port T1 of 11 communicates with the oil circuit of the telescopic oil cylinder 4 through the one-way valve 13, and the one-way valve 13 restricts oil from moving from the oil port T1 of the first electromagnetic reversing valve 11 to the oil circuit direction of the telescopic oil cylinder 4;

[0018] In normal state, port P1 of the first electromagnetic reversing valve 11 is connected to port B1, and port A1 is connected to port T1....

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Abstract

The invention provides a crane telescoping control device, which comprises an emergency control valve group. The emergency control valve group comprises a first electromagnetic change valve and a second electromagnetic change valve. The oil port (P1) of the first electromagnetic change valve is communicated with the oil circuit of a telescopic cylinder. The oil port (T1) of the first electromagnetic change valve is communicated with the oil circuit of the telescopic cylinder through a non-return valve. The oil port (P2) of the second electromagnetic change valve is communicated with the oil port (A1) of the first electromagnetic change valve. The oil port (T2) of the second electromagnetic change valve is communicated with the oil port (B1) of the first electromagnetic change valve. The oil port (A2) of the second electromagnetic change valve is communicated with the oil cylinder of the cylinder pin mechanism of a crane. The oil port (B2) of the second electromagnetic change valve is communicated with the oil cylinder of the arm pin mechanism of the crane. In a normal state, the first electromagnetic change valve is taken as the main control valve and is used to control the switching of the cylinder pin and the arm pin, and once the first electromagnetic change valve is trapped in a lower position, the second electromagnetic change valve is taken as the auxiliary control valveto control the switching of the cylinder pin and the arm pin.

Description

technical field [0001] The invention relates to a crane telescopic control device. Background technique [0002] Most modern dobby cranes use a single-cylinder bolt-type telescopic mechanism, the most critical part of which is a bolt-type telescopic cylinder. The telescopic cylinder is arranged with cylinder pins and arm pins to realize the connection or disconnection between the boom sections. Hydraulic control is adopted. Way. Due to the need for control, and in order to reduce the connection of hydraulic and electrical pipelines outside the boom assembly, the control valves of the cylinder pin and the arm pin are usually designed to be integrated with the telescopic cylinder. In conventional control device products, the control valve is only responsible for the reversing of the cylinder pin and the arm pin (because the cylinder pin and the arm pin are mutually exclusive). In order to increase the anti-pollution ability, a filter device may be added. [0003] Such as fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/687F15B20/00F15B21/08
CPCF15B20/008F15B21/087B66C23/701
Inventor 徐尚国徐青山冯文昌孙玉魁党伟程伟田善玉
Owner ANHUI LIUGONG CRANE
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