Rotary valve for impactor of hydraulic rock drill
A technology of rock drills and impactors, which is applied in the field of hydraulic rock drills, can solve problems such as difficult processing and changes in impact frequency, and achieve the effects of good applicability, small number of parts, and simple and reliable structure
Pending Publication Date: 2021-12-21
WENZHOU UNIVERSITY
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Problems solved by technology
[0006] The purpose of the present invention is to provide a rotary valve for hydraulic rock drill impactors to solve the problems that the current hydraulic rock drills with valves are difficult to process and the impact frequency cannot be changed according to rock conditions
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Embodiment Construction
[0041] The following is further described in detail through specific implementation methods:
[0042] The reference signs in the drawings of the description include: cylinder block 1, high-pressure input port 11, high-pressure oil passage 12, front end cover 13, rear end cover 14, end cover step 15, impact piston 2, boss 21, piston step 22, Front chamber 31, rear chamber 32, valve body 4, distribution ring groove 41, high pressure ring groove 42, high pressure port 43, low pressure port 44, valve sleeve 5, through hole 51, distribution groove 52, valve core 6, protrusion 61, High pressure tank 62, low pressure tank 63, high pressure accumulator 7.
[0043] Such as figure 1 , figure 2As shown, a rotary valve for a hydraulic rock drill impactor includes a cylinder body 1, an impact piston 2, a flow distribution rotary valve and a high-pressure accumulator 7, and the two ends of the cylinder body 1 are respectively fixedly connected with a front end cover 13 and a rear end cov...
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The invention belongs to the technical field of hydraulic rock drills, and particularly discloses a rotary valve for an impactor of a hydraulic rock drill. The rotary valve comprises a cylinder body, an impact piston and a distribution rotary valve, and the cylinder body is provided with a high-pressure input port; a boss is arranged in the middle of the impact piston and located in the cylinder body; a front cavity and a rear cavity are formed in the cylinder body, the driving area of the rear cavity is larger than that of the front cavity, and the high-pressure input port is in communication with the front cavity; blocking structures are arranged in the middle of the front cavity and the middle of the rear cavity and used for being matched with a front end cover or a rear end cover in an abutting mode; and the distribution rotary valve sequentially comprises a valve body, a valve sleeve and a valve element from outside to inside, a low-pressure groove and a high-pressure groove are formed in the valve element at intervals, a high-pressure opening and a low-pressure opening are formed in the valve body, the high-pressure groove and the low-pressure groove can be in communication with a distribution groove in a circulating mode when the valve element rotates, and the distribution groove is in communication with the rear cavity. Compared with the prior art, the rock drill is simple in structure, low in machining difficulty, simple and convenient to operate and high in applicability, and the impact frequency can be adaptively adjusted according to rock conditions.
Description
technical field [0001] The invention belongs to the technical field of hydraulic rock drills, and specifically discloses a rotary valve used for a hydraulic rock drill impactor. Background technique [0002] The rock drill is a tool used to directly mine stone. The rock drill is used to drill a blast hole in the rock formation, and explosives are placed in the blast hole to explode the rock, or the rock drill is used to break the key position of the rock to break the rock as a whole, so as to realize the mining of stone or Mining other stone. Existing rock drills can be divided into four classes such as pneumatic rock drills, internal combustion rock drills, electric rock drills and hydraulic rock drills by its power source. [0003] The hydraulic rock drill is a kind of rock drill that uses high-pressure oil as power to push the impact piston to impact the drill, and is equipped with an independent rotary mechanism. The impact piston is controlled by the impact device to r...
Claims
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IPC IPC(8): E21B1/26
CPCE21B1/26
Inventor 任燕臧一人汤何胜孙维方向家伟
Owner WENZHOU UNIVERSITY