Crane telescopic arm subsidence prevention apparatus, method and crane
A technology for telescopic booms and cranes, applied in cranes and other directions, can solve problems such as reducing the gas content of oil, achieve the effects of preventing static subsidence, improving safety performance, and ensuring elongation
Inactive Publication Date: 2013-03-27
XUZHOU HEAVY MASCH CO LTD
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- Application Information
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Problems solved by technology
[0016] This method of adding back pressure to reduce the gas content of the oil and increase the volume elastic modulus of the oil can reduce the shrinkage of the telescopic cylinder to a certain extent, but it cannot fundamentally solve the problem of the static sinking of the telescopic cylinder
Method used
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Embodiment Construction
[0053] The core of the invention is to provide an anti-sinking device for the telescopic arm of a crane. The device can effectively prevent the telescopic oil cylinder from standing still and sink, and ensure that the elongation of the telescopic arm remains unchanged, thereby improving the safety performance of the crane.
[0054] Another core of the present invention is to provide a crane telescopic arm anti-sinking method and a crane equipped with the crane telescopic arm anti-sinking device.
[0055] 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.
[0056] 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 a primary and secondary relationship.
[0057]...
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The present invention discloses a crane telescopic arm subsidence prevention apparatus, which comprises a controller, a pressure detection element for detecting pressure of a rod-free chamber of a telescopic oil cylinder of the telescopic arm, and a one-way oil supplement oil circuit arranged between the rod-free chamber of the telescopic oil cylinder and an oil entering oil circuit, wherein a first check valve, an energy accumulator and an electromagnetic valve are sequentially arranged on the one-way oil supplement oil circuit along an oil entering direction, a signal output terminal of the pressure detection element is connected with a signal input terminal of the controller, and a signal output terminal of the controller is connected with a control terminal of the electromagnetic valve. With the apparatus, telescopic arm oil cylinder standing subsidence can be effectively prevented, and it can be ensured that elongation of the telescopic arm is not changed so as to improve a safety performance of the crane. The present invention further discloses a crane telescopic arm subsidence prevention method and a crane provided with the crane telescopic arm subsidence prevention apparatus.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an anti-sinking device for a telescopic arm of a crane. The invention also relates to a method for preventing subsidence of a telescopic arm of a crane, and a crane provided with the device for preventing subsidence of a telescopic arm of a crane. Background technique [0002] A crane is a construction machine that can lift vertically within a certain range or lift vertically and move heavy objects horizontally. [0003] Please refer to figure 1 , figure 1 It is a structural schematic diagram of a hydraulic crane in the prior art. [0004] Hydraulic crane 1 is a crane that uses hydraulic energy as lifting power. Its telescopic arm 2 is retracted during driving and extended during operation to form a certain working height or working range. [0005] The telescopic oil cylinder is an important part of the crane. It can realize the relative movement between the arm...
Claims
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IPC IPC(8): B66C23/88
Inventor 东权向小强刘东宏
Owner XUZHOU HEAVY MASCH CO LTD