Cylinder buffer device and operating method for hydraulic hoist

Abstract

The invention relates to a hydraulic hoist oil cylinder buffering device and an operation method. The hydraulic hoist oil cylinder buffering device comprises a cylinder body; a bearing piston is installed in the cylinder body in a sliding fit mode, a piston rod is fixedly installed in the bearing piston, and a semi-piston and a buffering sleeve are fixedly installed at the end, located in the cylinder body, of the piston rod; a lower cover is installed at one end of the cylinder body, an annular groove is machined at the end, located in the cylinder body, of the lower cover, and a throttling orifice plate is assembled in the annular groove; the throttling orifice plate is sealed in the annular groove through a pressing cover, and a sealing pressing cover and a dirt scrapping ring are installed on the outer end face of the lower cover and are matched with the outer wall of the piston rod. The hydraulic hoist oil cylinder buffering device is convenient to machine and capable of being easily assembled into a high-speed door hydraulic hoist, so that the buffering effect during door closing is good, hindering on high-pressure oil during door opening is small, the door opening pressure is not increased, and the service lives of sealing parts and a hydraulic system are hardly influenced.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower, and is used for cushioning when a fast-working gate hydraulic hoist closes the gate, so as to prevent excessive impact caused by excessive speed when the gate reaches the bottom sill. Background technique [0002] In the process of water conservancy construction, such as when building ship locks or building hydroelectric power stations, fast working gates and fast door hydraulic hoists for opening and closing the gates are often used. The function of the fast working gate is that when an emergency occurs, the gate can quickly drop to close the water flow and prevent accidents. Therefore, the closing speed of the fast door hydraulic hoist is fast. If no buffer device is installed in the hydraulic hoist cylinder, when the gate falls to the end of the stroke, it will cause a greater impact on the gate bottom sill and the lower cover of the hoist. At this stage, there are many forms o...

AI Technical Summary

Problems solved by technology

However, most of these devices are relatively complicated, and some have relatively high processing requirements, which reduces the stability and reliability of the buffer device.

Some buffer devices currently used have a disadvantage that the buffer effect is better when the door is closed, but in the process of opening the door, the buffer device has a greater hindrance to the high-pressure oil, so that within a period of time when the door is opened, the door will not be opened. The pressure is higher than the normal working pressure, sometimes even up to several MPa, which affects the service life of sealing elements and hydraulic systems

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