SU687180A1 - Hydrohammer - Google Patents

Description

(54) HYDROMOLOT

one

The invention relates to pile hydraulic hammers for immersing piles, pipes, leaders and other similar elements.

Hydraulic hammers are known that include a housing, a striking part, a hydroaccumulator, a pressure and discharge lines, a spool device, working cylinders with pushers. In such hydraulic hammers, the pushers, after raising the hammer part, return to the initial position by the hammer part. Returning to the initial position, the pushers push the liquid at a high rate into the discharge. The speed of the impact part and the pushers fall is slowed down by the resistance of the ejected fluid, reducing the speed and impact energy of the hammer, reducing the durability of its work due to the impact of the impact part on the pusher m 1. i

Hydraulic hammers are known for immersing piles, including working cylinders with pushers, impact part, hydroaccumulator, spool valve, discharge and pressure lines, which guide rods, the push rod being telescopic 2.

In such hydraulic hammers, telescopic pushers return to their initial position with a striking unit at high speed, pushing the liquid from under the pusher into the drain. The ejected fluid from under the pusher creates a braking of the pushers and the shock part. Braking the shock reduces the impact energy of the hammer.

The purpose of the present invention is to increase the immersion capacity of the hammer by reducing the loss of impact energy to push the liquid out from under the pushers.

For this purpose, in a hydraulic hammer, which includes working cylinders with pushers, a shock part, guide bars, a hydroaccumulator, a spool valve, a pressure and drain lines, and a pinhole cavity of each working cylinder are connected to a pressure line.

The drawing shows the hammer, General view.

Claims (2)

The hydraulic hammer includes a shock part 1 moving along guide shchtangs 2, which are connected to the lower head plate 3 and the upper head plate 4. In one of the rods 2 there is a hydraulic accumulator 5 and a spool device 6. In the lower head bar 3, the pushers of 7 working cylinders with the rod end are placed 8 and a piston cavity 9. The piston cavity 9 is connected by a channel 10 to a spool device 6, the rod cavity 8 is connected to a pressure line 11. The drain line 12 is connected to a spool device 6. The pressure line 11 is connected to a hydro the accumulator 5, with the spool device 6 and the pump 13. The traverse 3 and the shock part 1 rest on the pile 14 through the cap 15. The hammer works as follows. When the pump 13 is turned on, the pressurized fluid enters the charging of the accumulator 5, through the pressure line 11 and to the spool device 6. The hydroaccumulator 5 is charged and the fluid pressure rises, at the end of charging at a certain pressure the spool 20 device 6 switches and connects The pump 13, the pressure line 11 and the hydroaccumulator 5 through the channel 10 with the piston cavity 9, the throat cavity 8 are permanently connected by the channel 16 to the hydroaccumulator 5. The pushers 7 accelerate the shock part 1 upwards with acceleration, with increasing speed the pressure in the pressure line 11 drops and at the end of the acceleration the spool device 6 switches, connects the piston cavity 9, the channel 10 to the drain line. The impact part 1, having reached a certain speed, continues to fly upwards, and the pusher 7 is decelerated by a fluid under pressure in the schtock cavity 8 and then retracts the pressure to its lowest position. The impact part 1 slows down and then falls and strikes the pile 14 through the headrest 15, without braking it by draining the liquid from under the pushers. Subsequently, the operation of the hydraulic hammer is repeated. The hydraulic hammer makes it possible to increase the immersion capacity of the hammer by reducing the loss of impact energy to push the liquid out from under the pusher. Claims of the Invention Hydrohammer, including working cylinders with pushers, impact part, guide rods, hydroaccumulator, spool-type switchgear, pressure and oil line, characterized in that in order to increase the immersion capacity of the hammer by reducing the impact energy of the ejection Well 1 tank from under the plungers, the rod cavity of each working cylinder is connected to the pressure pipe. Sources of information taken into account in the examination 1. M. I. Ivanov, et al., “New Drives of Technological Machines of Percussion Action, UKRNIINTI, 1971, p. 19-20. 2. Copyright testimony number 359342, cl. E 02 D 7/10, 1970.