SU802598A1 - Concrete pump - Google Patents

Description

one

The invention relates to pump engineering, in particular to pumps for pumping viscous and heterogeneous liquids with a concrete pump.

A concrete pump containing a receiving hopper, a distribution device including a C-shaped nozzle mounted for swinging around the axis of the discharge pipeline so that one end of the nozzle is permanently connected to this pipeline and the second alternately, in a pump stroke, communicates with one of the two working cylinders 1.

A C-shaped pipe in a known pump is placed in a receiving bin, which complicates the maintenance and repair of the concrete pump, since in order to gain access to the switchgear it is necessary to remove the concrete mixture from the receiving bin and flush the pump elements. In addition, the placement of the C-shaped pipe in the receiving bunker increases the energy consumption for its movement when changing the working cycles of the pump due to the high viscosity of the concrete mix in the receiving bunker.

The aim of the invention is to improve the operating conditions and reduce energy costs.

This is achieved by the fact that the distribution device is placed between the receiving bin and the working cylinders, and its C-shaped nozzle is provided with two rigidly connected with it and symmetrically mounted cylindrical nozzles relative to it, the latter being located on the same radius with the second end of the C-shaped nozzle relative to the swing axis of the latter, and the distance between the axes of the second end of the C-tube and any of the cylindrical nozzles is equal to the distance between the axes of the working cylinders.

FIG. 1 shows a concrete pump in longitudinal section; in fig. 2 view A of FIG. If in FIG. 3 is a section BB of FIG. one.

Claims (3)

The concrete pump contains a receiving bunker 1, two working cylinders 2 and 3, an injection pipe 4, a distribution device located between the receiving bunker 1 and working cylinders 2 IZ, including a C-shaped pipe 5, installed with a possibility of swinging around the axis b of the discharge pipeline 4 so what. one end of the nozzle is constantly connected with this pipeline, one 4, and the second alternately, at the pumping stroke, communicates with one of the two working cylinders 2 and 3. The C-shaped nozzle 5 is equipped with two rigidly connected with it and symmetrically relative to its established cylindrical nozzles 7 and 8, the latter being located on the same radius 9 with the second end of the C-shaped nozzle 5 relative to the swing axis b of the latter, and the distance between the axes of the second end of the Shaped nozzle 5 and any of the cylindrical nozzles 7 or 8 niyu Between the axes of the working cylinders 2 and 3. The cylindrical nozzles 7 and 8 and the second end of the C-shaped sleeve 5 on the side facing the working cylinders 2 and 3 are connected to each other by the plate 10, and on the side facing the receiving hopper 1 plate 11, while in the wall 12 of the receiving hopper 1 there is a groove 13 through which the concrete mixture can flow from the receiving bunker to the nozzle 7 or 8. Swinging of the distributor around axis 6 is provided with the help of Two hydraulic cylinders 14 and 15. Operating cylinders 2 and 3 fixed on the fixed plate 16 and have pistons i l7 and 18, respectively. To move the concrete mixture in the receiving hopper 1, there is a mixing shaft 1 as well as blades 20 mounted on the slab 11. The concrete pump works as follows. During the suction stroke in the cylinder 2, the distributor by means of hydraulic cylinders 14 and 15 is installed in a position in which the cylindrical pipe 7 connects the working cylinder 2 to the receiving buffer 1 through the groove 13 in the wall 12. At the same time, the working cylinder 3 communicates with the second end C -shaped fitting 5. The piston 17 of the cylinder 2 moves in the direction of increasing its displacement - a suction stroke occurs in the cylinder 2. At the same time, the piston 18 of the cylinder 3 moves in the direction of decreasing its working volume — an injection stroke occurs in the cylinder 3 and the concrete mixture from the cylinder 3 along the C-shaped nozzle 5 is displaced into the discharge pipeline 4. When these strokes are performed, the ends of the cylindrical nozzle 8 are closed plate 16 and wall 12. At the end of the movement of the pistons in cylinders 2 and 3, by means of hydraulic cylinders 14 and 15, the switchgear moves to another extreme position, in which the cylindrical tube 8 connects the working cylinder PDR 3 with a receiving hopper 1 through a slot 13 in the wall 12, while operating cylinder 2 communicates with the second end of the C-shaped sleeve 5. The piston 18 of the cylinder 3 is moved in the direction of increasing the displacement volume - occurs in the suction stroke cylinder 3. At the same time, the piston 17 of the cylinder 2 moves in the direction of decreasing its displacement - the injection stroke in the cylinder 2 occurs, and the concrete mixture from the cylinder 2 along the C-shaped nozzle 5 is displaced into the discharge line -4. Further, the cycles are repeated. Therefore, with such a performance-. Research institutes of the switchgear Provides free access to all elements of the switchgear, which improves the operating conditions, and also reduces the energy consumption for moving the switchgear, since energy losses due to the movement of the switchboard in viscous concrete are eliminated. Claims of Invention two working cylinders, characterized in that, in order to improve the operating conditions and reduce energy consumption, a switchgear is placed between the receiving hopper and the working cylinders, and its C-shaped tube provided with two tough with him. connected and symmetrically mounted cylindrical nozzles relative to it, the latter being located on the same radius with the second end of the C-shaped n-sleeve relative to the axis of rolling of the latter, between the axes of the working cylinders. HcTOiHHKVi information taken into account during the examination 1. USSR Patent No. 498917, cl. F 04 B 15/02, 1971. View A FIG.