Double-speed manual booster pump for hydraulic device with long-stroke hydraulic cylinder

Abstract

The invention discloses a double-speed manual booster pump for a hydraulic device with a long-stroke hydraulic cylinder, which comprises a booster mechanism and a hydraulic system. The booster mechanism comprises a pump body. A circular hole is formed in the middle of the pump body. A booster ring in sliding seal fit with the circular hole is arranged in the circular hole. A compression spring isconnected between the booster ring and the bottom surface of the circular hole. A pump plunger in sliding fit with the booster ring is arranged in the middle of the booster ring. A cover body in sliding fit with the pump plunger is connected on the pump body. An oil hole I and an oil hole II in the pump body communicate with the hydraulic cylinder through the hydraulic system. The oil hole I is connected with an oil tank through a hydraulic control reversing valve, and connected with the hydraulic cylinder through a back pressure valve. The oil hole II is connected with the hydraulic cylinderthrough a second one-way valve, connected with the oil hole I through the second one-way valve and the back pressure valve in sequence, and connected with the oil tank through a first one-way valve. The hydraulic system further comprises a rotary valve. According to the booster pump, the long-stroke hydraulic cylinder can run fast in no-load and move slowly in working stroke, thereby helping saving overall pressurizing time.

Description

technical field [0001] The invention relates to the field of pressurization equipment, in particular to a two-speed manual pressurization pump for long-stroke hydraulic cylinder hydraulic devices. Background technique [0002] Long-stroke hydraulic cylinder hydraulic device generally refers to a hydraulic device in which the booster pump needs multiple strokes to complete the hydraulic cylinder pushing work. In some simple mechanical devices, hydraulic devices with long strokes (such as manual hydraulic jacks) are often used to push objects. These hydraulic devices basically have to go through a certain length of no-load before generating working pressure. stroke, and then the pressure stroke is possible. However, due to its own defects, the long-stroke hydraulic device must make the oil cylinder slowly go through the empty stroke without load, which wastes a lot of time and energy. In order to improve the working efficiency of the hydraulic device, the working piston of t...

AI Technical Summary

Problems solved by technology

Due to the manual pressurization method, the pressurization force is limited. In order to achieve a large working pressure, the pressurization mechanism must have a large pressurization ratio. The plunger pump is required to have a large pressurization stroke or a large number of pressurization strokes, which increases the manual workload and pressurization time, thereby reducing its work efficiency

If a larger pump plunger is used, a greater pressure needs to be applied to the pump plunger in the later stage of pressurization, because manual pressurization will increase the manual force of the person, and even cause difficulty in pushing objects

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