SU1565962A1 - Hydraulic hammer - Google Patents

Abstract

The invention relates to construction machines, in particular, to the design of single-action hammers with hydraulic drive, which can be used to sink piles, loosen and compact soil, etc. works The purpose of the invention is to simplify the design, increase the reliability and stability of its work in regulating the impact energy of the hammer. In hydro hammer, time relays 8 are equipped with two non-return valves 12 and 13, the over valve valve 14 of one of them is connected via channel 15 to the valve chamber 16 of the two-stage pulsator valve 7, the other valve 17 valve connected to the piston chamber 18 of time relay 8, and their valve cavities 19 and 20 are connected to a drain. Hydraulic hammer contains shock part 2 located in housing 1, operating cylinder 4 with actuator plunger 5 and automatic repeat 6, which includes a pulsating valve 7 and a time relay 8. The cavity 14 is connected by a channel with a pulsating valve 7 connected to a pressure line 24, and the drain line 22. The cavity 18 of the relay 8 is connected to the valve valve 16 by means of a pipeline and a flow controller embedded in it. 1 sludge.

Description

The invention relates to construction machines, in particular to the design of hammers with hydraulic actuator, and can be used for the immersion of soil loosening and soil compaction, etc. works in the construction of buildings, roads, as well as platform platforms for offshore oil and gas production.

The aim of the invention is to simplify the design, increase the reliability and stability of the operation when regulating the impact energy of the hammer.

The drawing shows a hydraulic hammer circuit.

The hammer includes a housing 1, in which the shock part 2, a headrest 3, a working cylinder 4 with a plunger 5, a cycle repeating device b, containing a two-stage pulsator valve 7 and a time relay 8 consisting of a spring-loaded spring 9 of the piston 10 and the pusher 11, move interacting with balls check valves 12 and 130 Nadklapanna cavity 14 of check valve 12 through channel 15 is connected to nadklapannuyu cavity 16 two-stage valve-pulsator 7. H adklapannaya cavity 17 of check valve 13 is directly connected to podpishn howl cavity 18 relays 8 time. Under valve cavities 19 and 20 are connected via a channel 21 to a drain pipe 22. The sub valve cavity 23 of the pulsator valve 7 is connected to the pressure line 24, and via canal 25 with the working cylinder 4 cavity. The drain valve cavity 26 of the pulsator valve 7 is connected with a drain line 22. The supply of working fluid from the pressure line 24 into the sub-piston cavity 18 of the relay 8 time

0

five

0

5 o 5 Q

five

It is carried out by means of a pipeline 27 with a flow regulator 28 mounted therein.

Hydraulic hammer works as follows.

In the initial position, the shock part 2 is on the headboard 3. The valve-pulsator 7 is closed. The piston 10 of the time relay 8 under the action of the spring 9 is in the lower position and presses the ball of the check valve 13 to the seat. The supra valve cavity 17 and the sub piston cavity 18 are disconnected from the sub valve valve 20. The check valve 12 is closed, and, respectively, the valve valve cavities 14 and 16 are disconnected from the sub valve cavity 19.

The device 6 automatic repeat cycles provides two modes.

In the first mode (when the flow controller 28 is closed), time relay 8 is turned off, and only the pulsator valve 7 is working. At the same time, the hammer operates with full energy at the highest lifting height of the impact part 2, since the pulsator valve 7 opens only at pressure setting the safety valve of the pumping station of the mobile chassis (not specified) with

In the second mode (when the flow controller 28 is open), by increasing or decreasing the flow of fluid into the sub-piston cavity 18, the speed of movement of the piston 10 is changed, and the opening frequency of the pulsator valve 7, i.e., increase or decrease the height of the impact of the shock (change the value of impact energy)

The working fluid from the pumping station passes through the pressure pipe 24 into the cavity 23 of the pulsator valve 7 and further along channel 25 into the cavity

operating cylinder 4, acting on

housing 1, shock part 2. At the same time, with flow regulator 28 open, fluid through conduit 27 enters cavity 18 of relay 8 temporarily. Under the action of fluid, the check valve ball 13 presses against the seat and the piston 10 moves up to the stop on the plunger 11, I act on the ledge pusher 11 piston 10 moves it. As a result, the check valve 12 opens. The cavity 14, the channel 15 and the cavity 16 are connected to the cavity 19 connected by the channel 21 to the drain mag-. strut 22. The pressure in these cavities is reduced to the pressure of the drain. Since the pressure in the cavity 23 significantly exceeds the pressure in the cavity 16, the pulsating valve 7 opens by connecting the cavity of the working cylinder 4 and the pressure line 24 to the drain line 22. Under the action of its own weight, the shock part 2 starts a downward movement, striking the headrest 3 and at the same time using the plunger 5 squeezes fluid from the cavity of the working cylinder 4 through channel 25 through the cavity 26 of the drain and the drain line 22 into the tank of the pumping station

At the same time, as soon as the pulsator valve 7 opens and the pressure in the hydraulic system decreases to the pressure of the drain, the action of the spring opens the check valve 13 and the cavities 17 and 18 are connected to the drain line 22 by means of the channel 21 and the pressure in the cavity 18 decreases to the pressure of the drain the piston 10 is moved to its initial position by the action of the spring 9. During the downward movement of the piston 10, the pusher 11 is held by the ball of the check valve 13 in the raised position to ensure the opening of the check valve 12. The spring of the check valve 13 should It is designed for a force greater than the weight of the pusher 11, the weight of the ball and the spring force of the check valve 12.

In the lower position of the piston 10, acting on the ball check valve

with t

ten

5659626

13, closes it. Iod the action of the spring of the check valve 12, the pusher 11 returns to its original position. The check valve 12 is closed. The cavity 14 is disconnected from the cavity 19. The pressure in the cavity 16 rises and

pulsator valve 7 closes. The cycle is repeated.

In hydraulic hammer, fluid pressure acts on the piston of the time relay only from the side of the piston cavity. The other cavity is unloaded because it is permanently connected to the drain, main. In this case, there is no need for a servo-distributor and a choke, the choice of which is significantly impeded with a variable pump performance. There is no need for precise manufacturing of parts for the purpose of landing on three surfaces, i.e. The design of the automatic cycle repetition device is simpler to manufacture and provides more reliable control of the impact energy, since the control is carried out only by turning the flow control knob

15

20

Claims (1)

Formula of invention five 0 A hydraulic hammer comprising a body, a shock part located therein, a cap of the head, a working cylinder with a plunger, a two-stage pulsator valve and a time relay in the form of a piston with a spring-loaded pusher, a pipeline with a flow regulator, a pressure and drain line, characterized in that simplifying the design, improving the reliability and stability of its operation in regulating the impact energy; the time relay is equipped with two non-return valves interacting with a spring-loaded pusher, whose cavities are connected to the channels and with the drain, and the supra-valve cavity of one of them is connected via a channel with the supra-valve cavity of a two-stage pulsator valve, the super-valve cavity of the other is directly connected to the sub-piston cavity of the time relay. five 0