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Single-cylinder pin insertion telescopic hydraulic system and telescopic boom crane

A single-cylinder pin telescopic, hydraulic system technology, applied in the direction of cranes, mechanical equipment, fluid pressure actuators, etc.

Active Publication Date: 2021-09-07
ANHUI LIUGONG CRANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem caused by the need to set a core tube inside the oil cylinder in the existing single-cylinder bolt telescopic hydraulic system of the crane, and to provide a Single-cylinder bolt telescopic hydraulic system and telescopic boom crane. In this hydraulic system, there is no need to set a core tube inside the cylinder, thereby simplifying the structure of the cylinder and avoiding the disadvantages caused by setting a core tube inside the cylinder.

Method used

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  • Single-cylinder pin insertion telescopic hydraulic system and telescopic boom crane
  • Single-cylinder pin insertion telescopic hydraulic system and telescopic boom crane
  • Single-cylinder pin insertion telescopic hydraulic system and telescopic boom crane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the single-cylinder bolt telescopic hydraulic system in this embodiment includes an oil cylinder 10, a main control valve 28, a cylinder arm pin plug-in interlock mechanism, a plug-in pin selection solenoid valve 24, a pin-out oil storage device, and a pin-collecting row Oil device, balance valve 29, pressure oil source 25, hydraulic oil tank 26, etc.

[0032] The pressure oil source 25 is connected to the main control valve 28 and is used to provide the main control valve 28 with hydraulic oil for the expansion and contraction of the oil cylinder 10 . The oil return port of the main control valve 28 is connected with the hydraulic oil tank 26 to realize the oil return of the hydraulic system. A relief valve 27 is arranged between the two working oil ports and the oil return port of the main control valve to avoid pressure overload on the oil cylinder.

[0033] The main control valve 28 is an electric proportional valve, which provides press...

Embodiment 2

[0054] Such as figure 2 As shown, compared with Embodiment 1, the difference is that the single-cylinder bolt telescopic hydraulic system in this embodiment also includes a second shuttle valve 61 and a cylinder pin emergency pull-out control valve 60 .

[0055] The cylinder pin 23 is connected with the cylinder arm pin switching solenoid valve 21 through the second shuttle valve 61, wherein the cylinder pin oil port of the cylinder arm pin switching solenoid valve 21 is connected with the first oil inlet port of the second shuttle valve 61, and the cylinder pin 23 and the The oil outlet of the second shuttle valve 61 is connected, the cylinder pin oil port D of the cylinder pin emergency pullout control valve 60 is connected with the second oil inlet end of the second shuttle valve 61, and the emergency pullout of the cylinder pin emergency pullout control valve 60 The pin oil port E is connected to the oil inlet end of the first one-way valve 32, and the pin oil port F of t...

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Abstract

The invention relates to a crane and aims at solving the problems caused by the fact that a core pipe needs to be arranged in an oil cylinder of an existing crane single-cylinder pin insertion telescopic hydraulic system. The invention provides a single-cylinder pin insertion telescopic hydraulic system and the crane. The hydraulic system comprises an oil cylinder, a main control valve, a cylinder arm pin insertion and extraction interlocking mechanism installed on a cylinder barrel of the oil cylinder, a pin insertion and extraction selection electromagnetic valve, a pin extraction oil storage device and a pin insertion oil collecting and discharging device. The pin extraction oil storage device is connected between the pin insertion and extraction selection electromagnetic valve and the oil cylinder and used for obtaining and storing pressure oil for pin extraction from an oil cavity of the oil cylinder and supplying the pressure oil for pin extraction to the pin insertion and extraction selection electromagnetic valve. The pin insertion oil collecting and discharging device is connected between the pin insertion and extraction selection electromagnetic valve and a small cavity of the oil cylinder and used for collecting and temporarily storing backflow oil during the pin insertion action and discharging the collected oil to the small cavity of the oil cylinder. In the system, the core pipe is not required to be arranged in the oil cylinder, the structure of the oil cylinder is simplified, the defects caused by arranging the core pipe are avoided, an independent oil source for pin insertion and extraction is not required, and the cost of the whole machine is reduced.

Description

technical field [0001] The invention relates to a crane, more specifically, to a single-cylinder latch telescopic hydraulic system and a telescopic arm crane. Background technique [0002] Today's medium and large tonnage cranes generally use two methods to drive and control the expansion and contraction of multi-section telescopic booms, one is a conventional telescopic cylinder (without core tube) combined with a rope arrangement, and the other is a single-cylinder bolt (with core tube) mechanism. way, each has its advantages. [0003] The combination of oil cylinder and rope row is generally suitable for telescopic mechanisms with no more than five-section booms. The advantage is that a single oil cylinder is small in size and high in telescopic efficiency. The disadvantage is that as the number of booms increases, two oil cylinders and rope rows need to be arranged inside the boom. The complexity of the layout increases and the space is limited. At the same time, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/693F15B15/14F15B15/20F15B1/02F15B13/02
CPCB66C23/708F15B15/1423F15B15/202F15B1/02F15B13/02
Inventor 徐尚国王开宇孙玉魁徐青山王冬田善玉
Owner ANHUI LIUGONG CRANE