SU1286679A1 - Hydraulic pile hammer - Google Patents

Abstract

This invention relates to construction machinery. The purpose of the invention is to increase the reliability of work and adjust the impact energy. To do this, in the hydraulic hammer, the control valve 14 has three coaxially located bores in the housing, in one of the outermost parts there is a stop element 15, and in the other piston 16 with a stem 17, passed through all the bores, in

Description

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A plunger is mounted on the middle bore .18, a ring 21 and springs 20 and 19 supported on it are installed on the stem 17. The high pressure cavity 22 is communicated via an adjustable choke to the pressure line 10. The control valve 27's pressure chamber 27 formed by a locking element 15 7 valve pulsator. The subvalvular cavity in the pulsator valve communicates with the rod cavity 36 of the control valve

14. Increasing or decreasing the value of the fluid supply to the cavity of the HIGH pressure 22 of the control valve 14 by means of the adjustable throttle 25 changes the frequency of the opening of the pulsator valve, through which the cavity of the working cylinder 4 is connected to either the drain or the pressure lines. Thus, the height of the impact of the impact part and the magnitude of the impact energy are regulated. 1 il.

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The invention relates to construction machines, in particular to the design of hydraulic hammers, and can be used to sink piles, tongue, loosen and compact soil, etc. Works at: a construction zda-. Research Institute, bridges, roads.

The purpose of the invention is to increase the reliability of work and adjust the impact energy.

The drawing shows a hydraulic hammer circuit.

The hydraulic hammer consists of a frame 1, in the guides of which the impact part 2, head-rest 3, working cylinder 4 with plunger 5 and valve-pulsator with spring-loaded locking element 6 move. Cavities are formed: valve-valve 7, valve-8 and pressure head 9. Moreover, pressure head cavity 9 is connected to the pressure line 10, via channel 11 - to the cavity of the working cylinder 4, and through the throttle hole 12 - to the valve valve 7. When the pulsator valve 9 is open, cavity 9 is connected to the cavity 8 connected with plum oh highway. In addition, the pickup area 13 is formed on the locking element .6 (preliminary lifting of the locking element 6 from the saddle).

In addition, the device contains a control valve 14 for adjusting the lifting height of the shock part 2, made in the form of three bores coaxially located in its housing, in one of the outermost parts there is a locking element 15, and in the other - a piston 16 with a stem 17, and equipped with a plunger 18 placed in the center bore, two springs 19 and 20, which are separated by a ring 21 rigidly fixed on the rod 17. forming high cavities 22 and low 23 pressures, communicated by inter-. by means of a throttle bore 0 24 in the plunger 18. In this case, the high pressure cavity 22 is connected to the pressure line 10 via the adjustable throttle 25, and the locking element 15 is equipped with a spring-loaded sleeve 26 mounted on the rod. The cavity 27 of the control valve 14 is connected to the over-valve cavity 7 of the pulsator valve, the sub-valve cavity 8. of which is in communication with the drain and the rod cavity of the control valve 14.

The hammer works as follows. In the initial position, the hydraulic system is filled with working fluid, the shock part 2 is resting on the headgear 3. The locking elements 6 and 15 are spring-loaded against the seats.

The working fluid from the pump along the pressure line 10 enters the cavity 9 of the pulsator valve, and then through channel 11 into the cavity of the working cylinder 4. At the same time, through the throttle hole 12, the liquid enters the 5th valve cavity 7, reinforcing the action v of the spring, presses the locking element 6 to the saddle, and through channel 28 enters the pressure cavity 27 of the control valve 14, from where through the throttle valve

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the hole 29 enters the cavity 30, reinforcing the action of the spring 31, presses the locking element 15 to the seat. From the pressure line 10, the liquid also simultaneously flows through conduit 32 through adjustable throttle 25 into the cavity 22 of high pressure.

Under the action of fluid, the plunger 5 raises the shock part 2.

Simultaneously, under the action of the pressure drop across the throttle 24, the plunger 18 is lowered, compresses the spring 19 until the coils touch. Then, acting on the ring 21, the plunger 18 moves the rod 17 with the piston 16 down until the nut compresses the spring 33. Last, I act through the sleeve 26 on the locking element 15, moves it down. In this case, cavities 34 and 27 are connected. The pressure at iolost 27 and 7 decreases to the pressure of the drain. Since the pressure in cavity 9 is currently greater than in cavity 7, the force acting on pad 13 raises the locking element 6, Cavities 8 and 9 are connected, connecting the pressure line 10 and the cavity of the working cylinder 4 with the drain.

the hydraulic system rises again and the cycle repeats.

Increasing or decreasing the value of the fluid supply to the cavity 22 by the high pressure of the control valve 14 controls the opening frequency of the pulsation valve, through which the cavity of the working cylinder 4 is connected.

JO either with a pressure line 10 (at

closed pulsator valve), either. , with a drain line (when open) The less often the cavity of the working cylinder 4 is connected to the drain line 15, the shock part 2 rises to a great height, and vice versa.

Thus, by adjusting the height 20 of the impact section, the magnitude of the impact energy is changed.

Claims (1)

Invention Formula 5 Hydraulic hammer - including shock part, working cylinder, pressure and drain lines, pulsating valve, control valve and adjustable throttle, different Under the action of its own weight blow-. By the fact that, in order to increase the reliability, the part 2 rushes down to increase the work and adjust the energy by removing the liquid from the cavity of the cylinder 4 to the drain. The pressure drop from the cavity 8 through the channel 35, which is formed on the drain line, is then transmitted to the rod cavity 36 of the control valve 14, keeping the piston 16 in the lower position until the end of the fluid discharge from the cavity of the working cylinder 4, i.e. until the impact of the impact part 2 with the cap 3 and the pile being immersed in the ground. The control valve is made in the form of three bore coaxially located in its body, in one of the extreme 35 of them there is a locking element, and in the other - a piston with a rod passed through all the bores, and the stem is equipped with a plunger in the middle bore separated by a ring rigidly fixed on the rod forming high and low pressure cavities interconnected by means of a throttle from the plunger, as soon as the discharge from the cavity of the working cylinder 4 is stopped and the pressure is 5 versts When the cavity of the high hydraulic vyravniv.aets, single-pressure connected to the pressure magist- novreyenno returned to the original position the plunger 16 with rod 17 under the action of the spring 20, the plunger 18 under the action of the spring 19, the spring 31, the locking element 15 sits down on the seat. Under the action of the spring, the locking element 6 of the pulsator valve also returns to its original position, i.e. 55 on with the drain and the rod end of the valve; the pulsator valve closes. Pressure control. VNIIPI Order 7687/28 Circulation 606 Subscription The control valve is equipped with a spring-loaded bushing mounted on the stem and 50 mounted on the stem, while the pressure chamber of the control valve is connected to the supra valve cavity of the pulsator valve, the hydraulic valve post increases again and the cycle repeats . By increasing or decreasing the value of the fluid supply to the high-pressure cavity 22 of the control valve 14 of the control valve 14, the rate of opening of the pulsator valve, which connects the cavity of the working cylinder 4, O either with a pressure line 10 (at closed pulsator valve), either. , with a drain line (when open), The less often the cavity of the working cylinder 4 is connected to the drain line, the higher the height of the impact part 2, and vice versa. Thus, adjusting the height 0 of the impact of the shock, change the value of the impact energy. Invention Formula 5 Hydraulic hammer - including shock part, working cylinder, pressure and drain lines, pulsating valve, control valve and adjustable throttle, different The control valve is made in the form of three boring holes coaxially located in its housing, in one of the outermost parts there is a locking element, and in the other - a piston with a rod passed through all the bores, and the stem is equipped with a plunger placed in the middle bore, separated by a ring rigidly fixed on the rod, forming cavities of high and low pressure, interconnected by means of a throttle made in the plunger versts, while the high-pressure cavity is connected to the pressure magical versts, while the high-pressure cavity is connected to the pressure magical on with drain and rod end of the valve, control panel. The control valve is equipped with a spring-loaded bushing supported on its end and mounted on the stem, while the pressure chamber of the control valve is connected to the over-valve cavity of the pulsator valve, the sub-valve cavity of which