CN2326395Y

CN2326395Y - Hydraulic pick

Info

Publication number: CN2326395Y
Application number: CN 97217107
Authority: CN
Inventors: 王惠民
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-05-21
Filing date: 1997-05-21
Publication date: 1999-06-30
Anticipated expiration: 2007-05-21

Abstract

The utility model relates to a hydraulic pick by hydraulic drive, which is composed of a control valve, a pilot operated directional control valve, a cylinder body, an impact bar, etc. in a casing of an eye ring. The DC hydraulic power source supplied by a hydraulic power unit enters the cylinder body via a high-pressure hose and the control valve, and the upper cavity of the cylinder is fixed between a plunger piston and a piston. Under the differential action, the upper cavity and the pilot operated directional control valve do mutually alternating flow matching to form the alternating liquid flow and cause the system to generate the pulse vibration. The piston and the impact bar are one body. The piston and the impact bar strike a drill to generate the impact of the pulse. The hydraulic pick is suitable for mining areas, working of stone, and the mining and crushing working of cement pavement.

Description

Hydraulic pick

The utility model relates to a kind of broken instrument that utilizes the hand-held of direct current hydraulic technique, and this instrument is applicable to exploitation, the crushing operation of mine, the cubic meter of stone, building, highway, municipal works, cement pavement.

At present, known broken instrument is to continue to use decades, utilizes the pneumatic pick of compressed air.Its deficiency shows with the supporting air compressor of pneumatic pick and cost an arm and a leg, and is bulky, is difficult for carrying; Noise is big, and environmental pollution is serious, and operator's working condition is poor; Power consumption is big, and broken energy is little, and efficient is low.

The purpose of this utility model is to improve the deficiency of pneumatic pick operation, reduces whole supporting valency, reduces noise, creates good working environment, increases work efficiency, and is social energy savings.

The utility model is achieved in that in the earrings shell to be made up of parts such as control valve, pilot operated directional control valve and cylinder body and impact bars.The control valve that is located at the cylinder body upper end closely is connected with cylinder body with pilot operated directional control valve.The direct current hydraulic power source that is provided by hydraulic power unit enters cylinder body by high-pressure hose via control valve, and epicoele is reciprocating under differential action by fixing plunger and piston in the cylinder body.Because piston width equals piston stroke, therefore and between the pilot operated directional control valve make mutual flow, form alternation liquid stream, make system produce impulse oscillation; Piston and impact bar are an integral body, and therefore piston hits drill steel together with impact bar and produces pulse shock at the volley.Increase pumping station system pressure and can strengthen impact energy, improve crushing efficiency.Hydraulic pick will reach off-load or duty, can realize as long as change the position of control valve spool.

Owing to adopt such scheme, the hydraulic coupling of Hydraulic pick is more than pneumatic pressure height, and therefore broken energy is big, and the crushing efficiency height is 1.5 to 2 times of pneumatic pick; Power consumption only is 20% to 25% of a pneumatic pick; Supporting with it hydraulic power unit compact conformation, volume is little, is convenient to operation, is easy to carrying; Hydraulic pick is lower by 25% than the whole matched price of pneumatic pick, and noise is low, and no fog can significantly improve operating environment and condition of work.In building industry and urban construction, can be used for the operation in night, opened up bright prospects for popularizing to use.

Below in conjunction with accompanying drawing the utility model is further specified.

Figure one is the Hydraulic pick outline drawing.

Figure two is Hydraulic pick structure charts.(removal shell)

Among the figure: 1, earrings shell 2, cylinder body 3, drill steel 4, the high-pressure hose 5 that is connected with hydraulic power unit, control valve spool 6, liquid controlled reversing valve core 7, spring 8, control valve 9, pilot operated directional control valve 10, plunger 11, piston 12, impact bar

In figure two, be illustrated as unloaded position, p is the hydraulic oil import, o is an oil return opening.During work, control valve spool (5) moves to right, p mouth pressure oil is entered the grease chamber " a " of cylinder body (2) through liquid reversal valve (9) by control valve (8), because piston (11) area is slightly larger than impact bar (12) area, therefore, under the oil liquid pressure effect, promote up, when the up termination of piston (11) (piston width equals stroke), pressure oil enters pilot operated directional control valve (9) left end, and promotion liquid controlled reversing valve core (6) overcomes spring (7) and moves to right, and this moment, pressure oil entered chamber " b " by grease chamber " a " via plunger (10), because " b " cavity area is far longer than the piston stroking upward area, therefore, impact bar under differential action (12) is descending, hits drill steel (3).Descending termination hydraulic control change-over valve core (6) left end off-load, liquid controlled reversing valve core (6) moves to left under the spring force effect, chamber " b " off-load, because the logical all the time oil return opening in " c " chamber, " a " chamber feeds hydraulic oil all the time, and therefore, piston (11) promotes up under grease chamber " a " pressure oil effect.Go round and begin again like this, piston (11) moves reciprocatingly together with impact bar (12) in cylinder body, hits drill steel (3) and forms pulse shock.For avoiding impact injury and reduce noise, in the grease chamber " a " two ends and liquid controlled reversing valve core (6) two ends are equipped with buffering area up and down.

Claims

1, a kind of with hydraulicdriven Hydraulic pick, in the earrings shell, form by parts such as control valve, pilot operated directional control valve and cylinder body and impact bars, it is characterized in that: the piston width in the cylinder body equals piston stroke, plunger of fixing and piston be the mutual alternately flow of work under the lid action is used and between the pilot operated directional control valve, form alternation liquid stream, produce pulse shock.

2, Hydraulic pick according to claim 1, it is characterized in that: grease chamber " a " feeds hydraulic oil all the time in the cylinder body, " c " chamber is communicated with oil return opening (o mouth), and the size of ballistic work depends on the pressure of " b " chamber (plunger) effective area and the output of hydraulic power unit system.

3, Hydraulic pick according to claim 1 is characterized in that: liquid controlled reversing valve core (6) is when piston (11) runs to two terminal locations, just changes the flow position of pilot operated directional control valve (9).