Hydraulic breaking hammer upper frequency modulation valve

Abstract

The invention relates to the technical field of hydraulic breaking hammers, and discloses a hydraulic breaking hammer upper frequency modulation valve which is characterized by comprising a valve deck, a valve rod is arranged at the bottom of the valve deck, a valve body is arranged below the valve deck, the bottom of the valve rod extends into the valve body, a liquid inlet and a liquid outlet are formed in the left end and the right end of the valve body respectively, and a fixed cylinder is arranged in the valve body. A base with a hollow structure is fixedly connected with the bottom of the fixed cylinder, and a liquid opening is formed in the periphery of the fixed cylinder. The hydraulic breaking hammer upper frequency modulation valve has the effects that when the valve rod moves downwards to the lowest point, the outer side wall of the valve rod is right attached to an inner cavity, located at the bottom of the liquid opening, of the fixed cylinder, the liquid opening is sealed at the moment, and in the process that the valve rod moves upwards slowly, the passing amount of oil in the valve body becomes larger and larger, in the using process of the frequency modulation valve, the oil directly impacts the bottom of a connecting rod, the valve rod is not damaged, and therefore the sealing performance of the frequency modulation valve cannot be affected no matter how long the frequency modulation valve is used.

Description

technical field [0001] The present invention relates to the technical field of hydraulic breaker, more specifically, it relates to a frequency regulating valve on the hydraulic breaker. Background technique [0002] The power source of the hydraulic breaker is the pressure provided by the excavator, loader or pump station, which can more effectively break stones and rocks in engineering construction and improve work efficiency. [0003] The interior of the hydraulic breaker includes a valve stem and a drill rod. The valve stem is driven by the oil flow in the middle cylinder, and the oil flow in the middle cylinder is controlled by a frequency control valve. When the oil volume increases or decreases, The frequency of drill rod striking will also increase or decrease correspondingly. The existing frequency control valve controls the amount of oil through the opening and closing of the half-open door. It is easy to be impacted by the amount of oil to cause wear and affect th...

AI Technical Summary

Problems solved by technology

[0003] The interior of the hydraulic breaker includes a valve stem and a drill rod. The valve stem is driven by the oil flow in the middle cylinder, and the oil flow in the middle cylinder is controlled by a frequency control valve. When the oil volume increases or decreases, The frequency of drill rod striking will also increase or decrease correspondingly. The existing frequency control valve controls the amount of oil through the opening and closing of the half-open door. It is easy to be impacted by the amount of oil and cause wear and tear, which affects the sealing performance of the frequency regulating valve, so it is necessary to improve this type of frequency regulating valve

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