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Emergency tower descending device of tower crane

A technology of tower cranes and lowering towers, which is applied to cranes and other directions, can solve the problems of oil cylinders that cannot operate, accidents, and pump stations that cannot provide pressure oil, etc., and achieve the effect of convenient installation

Pending Publication Date: 2021-02-26
广汉市正诚液压机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the event of a power outage or failure of the pumping station during this process, the pumping station cannot provide pressure oil, causing the oil cylinder to fail to operate. At this time, the upper-spinning part is only supported by the oil cylinder and is not connected to the standard joint, which is prone to accidents

Method used

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  • Emergency tower descending device of tower crane
  • Emergency tower descending device of tower crane
  • Emergency tower descending device of tower crane

Examples

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Embodiment 1

[0019] Embodiment 1. This embodiment is an emergency tower lowering device for a tower crane. Specifically, a jacking cylinder of a tower crane is in a power failure or a pump station fails. The pump station cannot provide pressure oil, so that the jacking cylinder cannot be discharged. When there is oil, the device for emergency oil release.

[0020] Such as image 3 Shown is a schematic diagram of the oil circuit of the jacking cylinder in this embodiment. As shown in the figure, there are two oil pipes between the fuel tank 300 and the jacking cylinder 100, which are respectively the oil pipe 421 connecting the rodless chamber of the jacking cylinder 100, and connecting Jacking oil cylinder 100 has the rubber hose 420 of rod chamber. When it is necessary to lift the oil cylinder 100 to lift the top-spinning part, manually switch the manual reversing valve 408 to the jacking position, and the motor 402 drives the oil pump 401 to extract the oil from the oil tank and open th...

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Abstract

The invention provides an emergency tower descending device of a tower crane. The emergency tower descending device comprises an emergency oil drainage channel and an emergency valve, wherein one endof the emergency oil drainage channel communicates with a high-pressure volume cavity in a jacking oil cylinder, and the other end of the emergency oil drainage channel communicates with an H port ofa pump station; and the emergency valve is arranged on the emergency oil drainage channel to prevent high-pressure oil in the high-pressure volume cavity in the jacking oil cylinder from flowing intoan oil tank through the emergency oil drainage channel and the H port of the pump station under the non-emergency situation. According to the emergency tower descending device, the emergency oil drainage channel is arranged, and the emergency valve arranged on the emergency oil drainage channel is utilized, so that the oil in the jacking oil cylinder can be drained in emergency circumstances.

Description

technical field [0001] The invention relates to the field of tower cranes, in particular to an emergency tower lowering device for a tower crane, which is an emergency pressure relief mechanism for a tower crane lifting oil cylinder. Background technique [0002] The tower crane needs to use the hydraulic jacking system when it is installed and disassembled. The Chinese invention patent authorization announcement number CN103848358 B provides such a tower crane tower body double oil cylinder jacking mechanism. The tower crane tower body double oil cylinder jacking mechanism , including a jacking outer frame and a standard section, a guide mechanism is provided between the jacking outer frame and the standard section, and the opposite sides of the jacking outer frame are fixedly connected with jacking cylinders, the cylinder of the jacking cylinder The body is fixed to the side crossbeam of the jacking outer frame, and the protruding end of the piston rod is facing downward, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/88B66C23/62
CPCB66C23/88B66C23/62
Inventor 谭元庆万成
Owner 广汉市正诚液压机械制造有限公司
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