Pressure-feedback-type hydraulic impactor

Abstract

The invention discloses a pressure-feedback-type hydraulic impactor, which consists of an impactor body and a control valve block. The impactor body comprises a drill rod, a piston, a cylinder body, a piston rear sleeve and a nitrogen chamber, wherein the piston is installed in the cylinder body and divides the cylinder body into a piston front chamber and a piston rear chamber; and the piston front chamber, the piston rear chamber and the nitrogen chamber are isolated from one another. The control valve block consists of a sliding valve, a sequence valve and an adjustable hydraulic-control two-position three-way reversing valve, wherein the sliding valve is of a two-position three-way structure, and a hollow chamber inside the sliding valve is divided into a normally-high-pressure chamber a1, an alternating chamber a2 and a control chamber a3 by a spool of the sliding valve. The impactor body and the control valve block are separately arranged. By adopting a pressure-feedback principle and using the sequence valve and the adjustable hydraulic-control two-position three-way valve to be organically connected with the hydraulic impactor body, the intelligent switching of the sliding valve is realized. Therefore, the impactor disclosed by the invention can realize the function of stepless impact energy adjustment according to different properties of working objects.

Description

technical field [0001] The invention relates to a hydraulic impactor, in particular to a pressure feedback hydraulic impactor, which can steplessly adjust the impact energy of the impactor by adjusting the pressure of a control valve group, thereby improving its technical performance and expanding its application range. Background technique [0002] The hydraulic impactor is a hydraulic impact machine that uses oil pressure as the power and relies on the reciprocating motion of the piston to output the impact power for operation. At present, it is widely used in mining, metallurgy, coal, transportation, construction, machinery and other industries, among which the impact crushing of materials is the most widely used, and has achieved remarkable economic and social benefits. Throughout the development history of hydraulic impactors, the technology has made very significant progress in the past fifty years. But in terms of structural principles, the hydraulic impactors curren...

AI Technical Summary

Problems solved by technology

Obviously, increasing or decreasing the impact energy have a great impact on the system

Since pressure and flow cannot be independently adjusted and controlled separately, the impact energy increases and decreases synchronously with the impact frequency. Reasonable phenomenon, which increases the cost of machinery and equipment, and largely limits the scope of use and work efficiency of hydraulic impactors

[0003] To sum up, the stroke feedback hydraulic impactor cannot realize the function of steplessly adjusting the impact energy of the hydraulic impactor according to the physical properties of the impacted object.

At the same time, the distribution valve of the traditional hydraulic impactor is assembled in the cylinder body, so the volume and weight of the cylinder body are large, the structure is complex, the processing accuracy is high, and the cost is high

In addition, when the multi-channel impactor is processed, there are often many process holes on the cylinder body, and the process holes will be blocked after processing. In the case of high-frequency vibration of the hydraulic impactor, oil leakage is prone to occur, and even develop For leakage, thus affecting the normal work of the hydraulic impactor

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