SU617524A1 - Hydraulic hammer - Google Patents

Description

one

The invention relates to construction and can be used in the immersion and extraction of piles and sheet piling, as well as in various construction works.

Known percussion instrument with hydraulic drive, comprising a cylindrical body with two chambers that interact through a rod with a piston n the hammer head 1.

However, such a percussion instrument is not able to reverse the direction of impact.

Closest to the invention is a hydraulic hammer for driving and removing piles, comprising corn, piston hammer, working cylinder, distributor, hydraulic system, the piston being communicated by means of a spherical liner and connecting element with a hammer 2.

The disadvantages of this hammer are significant complexity and unreliability of the design.

The purpose of the invention is to simplify the design of a hydraulic hammer and increase its reliability.

 This is achieved by the fact that in a hydraulic hammer for lowering or removing piles, including a housing, a piston impact part, a working cylinder, a distributor, a hydraulic system, and a supply line, the hydraulic system is equipped with additional pistons connected to the supply line, hydraulically connected cylinder through the nozzles.

FIG. 1 shows the scheme of the hydraulic hammer for lowering piles; in fig. 2 is the same for piling.

A hydraulic hammer consists of a housing 1, a hammer 2 mounted on the lower end of the piston rod 3 and placed between surfaces 4 and 5 of housing 1. A clamp 6 is installed in the lower part of housing 1 to exchange the end of the pile 7 in it.

The hydraulic system of the hammer includes supply lines 8 and 9, a hydraulic cylinder 10 with a piston 11, check valves 12-15, a distributor 16, a hydraulic cylinder 17 with a piston 18, a hydraulic cylinder 19 with a piston 20.

Normings 18 p 20 are made with channels 21, 22 and jets 23, 24. Elements of the hydraulic system are communicated with chambers 25, 26 of housing 1 through pipelines 2733. The hydraulic cylinders 17 and 19 are in fluid communication with the supply lines B and 9 of the power supply via control lines 34-37.

FIG. An example is given of using a hammer to immerse pile 7. Here is given the position of the elements of the mechanism corresponding to the start of acceleration of the striker 2 when it strikes the surface 5 of housing 1.

In this case, the hammer works as follows.

The working fluid from the pumping station is fed into the line 8. Entering the cylinder 10, it shifts the piston 11 down, as shown, and passes through the pipe 27, the valve 16, the spool of which is switched to the upper position by the piston rod 3, the check valve 14 into the chamber 25. At the same time, the working fluid passes through the pipes 34, 35 into the cylinders 17, 19 and moves the pistons 18, 20 to the extreme positions (Fig. 1). Entering chamber 25, the fluid moves piston 3 from bang; 5; dm. down, and the last one makes a strike from the air gap 5. At the same time, the liquid from chamber 26 through pipeline 33, kana / 1.22 pistons 20, pipelines 32, 31, distributor 1p, pipeline 30, non-return valve 13 comes to line 9 communicated with the discharge of the pumping station. The check valve 12 at this time is blocked by the pressure of the line 8.

In the process of striking, the spool of the dispenser 16 switches to the lower position. The working fluid from the pipeline 27 goes through the distributor 16, the pipelines 31, 32, the channel 22 and the pipeline 33 to the chamber 26. The piston 3 with the hammer 2 moves upwards.

At the same time, the liquid from the chamber 25 through the pipeline 29, the jet 23, the pipeline 28, the distributor 16, the pipeline 30 and the check valve 13 enters the line 9 communicated with the drain of the pumping station. Due to the fact that the working fluid outflows from chamber 25 through the jet 23, the piston 3 rises with the hammer 2 slowly without striking the surface 4 of the housing 1. At the end of the stroke of the piston 3 upwardly, the spool valve 16 reverses and the cycle repeats. Thus, the drummer makes a slow movement upwards and fast downwards with a blow to the surface 5. In this case, the hammer works as a mechanism for sinking piles.

FIG. Figure 2 shows the use of a hydraulic hammer to remove the pile. Here is given the position of the elements of the mechanism corresponding to the beginning of acceleration of the striker 2 when they strike a blow on the surface 4 of the housing 1.

The hammer works as follows.

The working fluid from the pumping station is fed to the line 9. Entering the cylinder 10, it shifts the piston And up, as shown, and passes through the pipe 27, the valve 16, the valve of which

switched to the lower position by means of a piston rod 3, pipeline 31 and a check valve 15 into chamber 26. Simultaneously, the fluid passes through pipelines 36, 37 into cylinders 17, 19 and displaces their pistons 18, 20 to opposite positions (Fig. 2). When entering the chamber 26, the fluid moves the piston 3 with the drummer 2 upward, and the latter makes a blow to the surface 4. At this time, the fluid from the chamber 25 through the pipeline 29, the channel 21, the pipeline 28, the distributor 16, the pipeline 30 and the check valve 12 enters line 8 communicated with the discharge of the pumping station. The check valve 13 is at this time blocked by the pressure of line 9.

In the process of striking, the spool of the dispenser 16 switches to the up position. The working fluid from the pipeline 27 goes through the distributor 16 and the check valve 14 into the chamber 25. The piston 3 moves with the drummer 2 down. At the same time, the liquid from the chamber 26 through the pipeline 33, the jet 24, the pipelines 32, 31, the distributor 16, the pipeline 30 and the check valve 12 enters the line 8 communicated with the discharge of the pumping station.

Due to the fact that the working fluid outflows from chamber 26 through the nozzle 24, piston 3 moves with drummer 2 down slowly, without hitting the surface 5 of housing 1. Thus, the drummer moves slowly down and fast up with a blow on surface 4, the direction The action of the breaker varies with the connection of lines 8 and 9.

The application of the proposed breaker automatically changes the direction of operation depending on the connection of the supply lines, which greatly simplifies its operation and increases reliability.

Claims (2)

1. French Patent No. 2131667, E 02d, published. 1972. 2. German Application No. 1759145, E 02d 11/00, published. 1975. S 72. 28 17 31 ///../ 7 L- 57