SU994792A1 - Concrete pump - Google Patents

Description

(54) CONTAINER PUMP

one

The invention relates to pump construction, in particular to pumps for pumping viscous and heterogeneous liquids, such as mixtures.

A concrete pump containing working cylinders, mounted on the front wall of the receiving bin and a distribution pipe with a driven device, mounted for rotation and limited axial movement relative to the rear wall of the receiving bin for alternating communication of the pipe end with one of the working cylinders, is known. with the back wall with the formation of a hinge 1}.

However, the hinge of the known pump is located in the concrete mixture and is subject to intensive abrasive wear, which reduces the durability of the distribution unit and the pump as a whole.

The purpose of the invention is to increase durability.

The goal is achieved by the fact that a concrete pump containing working cylinders mounted on the front wall of the receiving hopper and distribution pipe with a drive device mounted for rotation and limited axial movement relative to the rear wall of the receiving hopper for alternating communication of the pipe end with one of the working cylinders pipe connecting the rear wall with the formation of a joint, and the hinge is made in the form of an elastic annular diaphragm, the peripheral part of which is fixed to the rear her wall, and the interior - on the socket.

The elastic annular diaphragm has an internal annular cavity filled with a working fluid, for example a viscous liquid, under a pressure exceeding the hydrostatic pressure of the concrete mix in the bunker.

FIG. 1 shows a concrete pump, type

15 in the plan; in fig. 2 - concrete pump with the size of the distribution unit; in fig. 3 - the same, the embodiment; in fig. 4 shows the distribution unit shown in FIG. 2; 20 in FIG. 5 shows a distribution unit corresponding to FIG. in fig. 6 is a section A-A in FIG. 2 and 3; in fig. 7 is a view B in FIG. 6

Concrete pump contains working cylinders 1, mounted on the front wall 2 of the receiving hopper 3, distribution

pipe 4 with a driving device 5, installed with the possibility of rotation and limited axial movement relative to the rear wall of the receiving bunker f) a 3 for alternately communicating the end of the pipe 4 with one of the working cylinders G. Pipe 4 4 is in conjunction with rear wall 6 to form a hinge in the form of elastic an annular diaphragm 7, the peripheral part of which is fixed on the rear wall 6, and internally on the nipple 4. The elastic annular diaphragm 7 has an internal annular cavity 8 filled with a working phone, for example, Stu, pressurized prevyi1ayuschim hydrostatic pressure of the concrete mix in the hopper 3. The distribution pipe 4 by the drive unit 9 by means of the knees 10 and communicates with delivery conduit 11.

Concrete pump works as follows.

In one of the extreme positions of the distribution pipe 4, one of the working cylinders K through this pipe 4 and elbows 9-10 communicates with the discharge pipe II, and the other working cylinder 1 with the receiving hopper 3, after which the pistons in the working cylinders 1 are driven in opposite directions. With this, the piston of the cylinder 1 communicated with the receiving hopper 3 moves in the direction of increasing the volume of the cylinder — a suction stroke occurs, and the piston of the cylinder 1 connected to the distribution pipe 4 moves in the direction of decreasing the volume of the cylinder — an injection stroke occurs. Upon completion of the strokes, the distribution pipe 4 is moved to another extreme position by means of the driving device 5, after which the phases of movement of the axes in the cylinders change and the cycle repeats ..

To periodically compensate for the wear of the end of the distribution pipe 4 facing the working cylinders, it is sufficient to loosen the fastening of the inner part of the diaphragm 7, move the nozzle 4 in the axial direction and reattach the internal part of the diaphragm 7 to the nozzle 4. The option of fastening the inside of the diaphragm 7. The nozzle 4 is shown in FIG. 6 and 7.

Filling the inner annular cavity 8 of the diaphragm “7 with a liquid practically excludes jamming of the nozzle 4 when turning.

The implementation of the articulation of the pipe 4 with the rear wall 6 of the receiving hopper 3 in the form of an elastic annular diaphragm significantly increases the durability of the pump, as it allows to compensate for the wear on the end of the distribution pipe, while

the hinge is less prone to abrasive wear.

Claims (2)

1. Concrete pump containing working cylinders mounted on the front wall of the receiving hopper and distribution pipe with a drive device mounted for rotation and limited axial movement relative to the rear wall of the receiving hopper For alternating communication of the pipe end with one of the working cylinders, and the pipe connecting with rear wall with the formation of a hinge, characterized in that, in order to increase durability, the hinge is made in the form of an elastic annular diaphragm, the peripheral part of which is fixed on the back of the stack, and internal to the nozzle. 2. Concrete pump according to claim I, characterized in that the elastic annular diaphragm has an internal annular cavity filled with a working fluid, such as a viscous liquid, under a pressure exceeding the hydrostatic pressure of the concrete mix in the bunker. Sources of information taken into account in the examination I. USSR author's certificate in application No. 3000720 / 25-06, F 04 B 15/02, 1980. fug. rih J fug. 7