SU753991A1 - Apparatus for driving and withdrawing pile-like elements - Google Patents

Description

(54) DEVICE FOR DIPPING AND REMOVING PILED ELEMENTS

one

The invention relates to construction equipment and is intended for the production of pile work in the construction of bridges, overpasses, hydraulic structures and civil structures.

Headrests to the vibratory pile driver are known, consisting of a two-cheek body, which are fastened to the pile with the help of a wedge and a spring-loaded striker acting on it with load 1.

Closest to the invention is a device for immersing and extracting piles, comprising a cap with a vibrator, a suspension damper to a lifting device, and clamping elements in the form of a hydraulic cylinder, an installation with pipelines, a hydraulic accumulator 2.

To control this type of headgear, a pumping unit is needed, installed near the immersion site and connected to the hydraulic cylinder by means of two lines assembled from flexible high-pressure hoses; the length of each line exceeds the length of the pile, i.e. it is several tens of meters. Such a system is inconvenient in operation, since the sleeves are quickly deteriorated from vibration during the operation of the hammer. They also create great difficulty in lightening a pile before it is dipped or laid on the ground after it is removed from the soil. In connection with these circumstances, it is more appropriate to place all the elements of the hydraulic drive, including the pump unit and the tank, directly on the headgear.

At the same time, it is necessary to ensure reliable operation of the hydraulic drive subjected to shock or vibration loads during the operation of the piling means. Loads of this kind are poorly maintained by reversing valves and valves with servo. In addition, the use of hydraulic systems with an open circulation of working fluid is unsuitable, because in this case splashing and foaming of the fluid in the tank is observed.

The aim of the invention is to increase

Claims (2)

20 reliability and performance, as well as the performance of the headgear, reducing its cost, facilitating the work of staff and simplifying construction technology. This goal is achieved by the fact that in a device for immersing and removing pile elements, comprising a head-cap with a vibrator, a suspension damper to a lifting device and a clamping element made in the form of a hydraulic cylinder, a pumping unit with pipelines, a hydraulic accumulator, a pump-mounting unit is mounted in the head-body and made in the form of a two-shaft engine and two pumps, the suction cavities of which are connected with each other and with the hydroaccumulator, and the discharge ones are equipped with pressure valves and are connected to the clamp and piston cavities of the hydraulic cylinder of the clamping element through a hydraulic lock; the hydraulic cavity of the hydraulic cylinder is connected through a non-return valve with a hydraulic accumulator connected, in turn, to the drain cavities of the pressure valves. FIG. 1 shows a svapogruzhayushchy device with a cap, a general view; in fig. 2 - diagram of the hydraulic drive of the head cover. The device for extracting and submerging the pile comprises a vibrator 1, a suspension shock absorber to a lifting device 2, a cap 3 in which a pump station 4 is mounted. The pump station 4 actuates the hydraulic cylinder of the clamping device 5 for fixing the device by means of a well 6 formed on the wall of the pile 7 The pumping station is built into the headgear and mounted on 8 vertical and 9 horizontal shock absorbers. Horizontal shock absorbers 9 made in the form of elastic rings, clad on rods attached to the pumping station and the cap. The circuit diagram of the hydraulic drive is made in a closed circuit. The discharge cavity of the pump 10 driven by the electric motor 11 is connected by line 12 through the check valve of the hydraulic lock 13 to the piston cavity of the hydraulic cylinder 14, and the discharge cavity of the pump 15 is connected by line 16 to the hydraulic cylinder of the cylinder. The suction cavities of the pumps are interconnected by a line 17. A hydroaccumulator 19 is connected to them by line 18, which in addition has a connection with the rod cavity of the hydraulic cylinder 12 through line 20 and a check valve 21 and a hydraulic lock 13. Pressure lines are installed in lines 12 and 16 22 and 23, acting as safety valves. The check valve 24 is designed to periodically replenish the system with working fluid. The device works as follows. Using the lifting mechanism, the device is installed on the pile 7 so that the wall of the pile is in the space between the brush and the matrix of the clamping device 5. Then the electric motor 11 of the pumping station is turned on in the direction in which the pump 10 starts to press the working fluid through line 12 into the piston cavity of the hydraulic cylinder 14. Under the action of the pressure of the liquid, the hydraulic cylinder rod extends and presses the pile to the die. The clamping force is limited by setting the pressure valve 22. During the extension of the brush, the liquid is displaced by the piston from the hydraulic cylinder cavity through line 16 to the pump 15, passes through it and through line 17 is fed into the suction cavity of the pump 10. At THIS, the difference in the volume of liquid in the hydraulic cylinder cavities automatically compensated by an additional portion of the fluid supplied by lines 18 and 20 from the hydraulic accumulator 19, which is discharged at this time. At the end of the pile clamping, the liquid is poured from the injection line 12 into the suction line 17 through the pressure valve 22. Then the electric motor 11 is turned off and the hydraulic lock 13 automatically blocks the cavities of the hydraulic cylinder 14. preventing leakage of fluid from it. A vibrator 1 is activated, which, depending on the construction technology, causes the pile to be immersed in the ground or removed from the ground. The reliability of securing the cap on the pile during this period is ensured by the forces created as a result of the pile being deformed by the cap of the pile and rigid fixation of the hydraulic cylinder brush, the cavities of which are blocked by the hydraulic lock 13. When the device vibrator 1 is working, the dynamic effect on the pump station elements decreases due to the latter on the vertical shock absorbers 8. In addition, to reduce the lateral movement of the pumping station, it is fixed relative to the headgear frame on the horizon Shock absorbers 9. To remove the cap from the pile, the motor 11 is rotated in the opposite direction, in which the pump 15 starts to pump fluid through line 16 into the hydraulic cylinder cavity and causes the brush to retract into the cylinder. In this case, the fluid displaced from the piston cavity of the cylinder through line 12 passes through pump 10 and is fed into the suction cavity of pump 15, and its effluent through line 18 enters the hydraulic accumulator 19 and charges it. The hydraulic drive of the device is compact, conveniently placed in the body of the headgear and remotely controlled using an electric cable. This made it possible to get rid of long pipelines, shorten the time for laying the cap on the pile and removing it from it. In this way, the productivity of work is increased and the work of the maintenance staff is greatly facilitated. Claims An apparatus for immersing and removing pile elements, comprising a cap with a vibrator, a suspension damper to a lifting device and a clamping element made in the form of a hydraulic cylinder, a pumping unit with pipelines, a hydroaccumulator, characterized in that, in order to improve reliability and performance, a pump the unit is mounted in the head-case and is made in the form of a two-shaft engine and two pumps, the suction cavities of which are connected with each other and with the hydroaccumulator m, and the injection pressure valves are provided and connected to schtokovoy and porschnevoy cylinder cavities through pilot controlled check valve clamping member, wherein schtokova cylinder cavity is connected through a check valve with pressure reservoir torus, bound, in turn, with the drain valve pressure cavities. Sources of information taken into account during the examination 1. USSR author's certificate No. 509694, cl. E 02 D 13/10, 1973. 2. Vibro shock shunt, j. "Transport construction, N ° 5, M., 1972. g / .2 vX / 9 21 (-r / 20 24