JPS601391A - Slurry pump - Google Patents

Abstract

PURPOSE:To provide a slurry pump of little pulsation, by bringing a spiral plate into contact with the outside of a flexible tube and rotating the spiral plate to push the tube to deform it. CONSTITUTION:A screw 5 is rotated by a motor 6, around an axis parallel with a tube 3. The screw 5 is supported by a bearing 7 so that the spiral plate 5a of the screw 5 is in contact with the outside of the tube 3 and pusheds the tube to deform it. A feeder 8 is provided in a hopper 1 to supply concrete into the tube 3. The spiral plate 5a of the screw 5 being rotated by the motor 6 pushes and deforms the tube 3 straightly, so that the concrete is sent under pressure to a discharge pipe.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pump for pumping slurry such as fresh concrete, mortar, and handmade fluid.

In the conventional squeeze type concrete pump, the first
As shown in the figure, fresh concrete is discharged by the action of crushing a tube (h) made of flexible material by two to six rollers (α), so there is a lot of pulsation, and there is also a lot of pulsation from the hopper ξ-. The fresh concrete sucked into the tube (
b) When passing through the inside, it turns approximately 180 degrees and is ejected,
There are restrictions on the layout of the pipeline connected to the discharge port.

In addition, conventional screw type concrete pumps
As shown in the figure, the screw (C
), fresh concrete is continuously discharged in a straight line by rotating the screw (C) and the casing (
The disadvantage of d) is that the inner surface is subject to severe wear and maintenance costs are high for replacing these.

In order to solve the above problems, the present invention includes a tube made of a flexible material that connects a hopper for storing slurry such as ready-mixed concrete and a discharge pipe, and a tube made of a flexible material that comes into contact with the outer surface of the tube to crush it. A slurry pump characterized by having a screw equipped with a spiral vane and rotatably supported, the purpose of which is to provide a slurry pump that does not require maintenance costs and can continuously discharge slurry. There is a pump to provide.

The present invention includes a tube made of a flexible material that connects the hopper and the discharge pipe, and a rotatably supported screw that includes a spiral blade that abuts against and crushes the outer surface of the tube. Therefore, it is neither a conventional squeeze type nor a screw type, and can eliminate the respective disadvantages of the conventional squeeze type and screw type, and at the same time have the advantages thereof. That is, in the present invention, the slurry is sent by sequentially crushing a tube made of a flexible material from the hopper to the discharge pipe using a spiral blade, so that pulsation does not occur (slurry can be discharged continuously, and Since the slurry does not turn 180 degrees while reaching the discharge port from the suction port, there is no restriction on the pipeline connected to the discharge port.

In the present invention, the slurry passes through the flexible tube and does not come into contact with the screw, and
Since metals do not come into contact with each other, there is less need for replacement due to wear (and maintenance costs can be reduced).

Hereinafter, the present invention will be specifically explained with reference to an embodiment shown in FIGS. 6 and 4 in which the present invention is applied to a concrete pump.

Hopper (1) and discharge pipe (2) for storing fresh concrete
A tube (3) made of a flexible material such as rubber is connected between the two and fixed with a joint (4).
3) is provided with a toruff (9) on its lower outer periphery. (
5) is a screw that is rotated around an axis parallel to the tube (3) by a motor (6). Screw (5)
is supported by a bearing (7) so as to be able to abut the spiral blade (5a) or the tube (3) outwardly and crush it. Further, a feeder (8) is installed inside the hopper (1). Fresh concrete supplied into the hopper (1) is passed through the feeder (8) into the tube (
3) is sent into the The tube (3) is connected to the motor (
The fresh concrete is continuously crushed and expanded by the blades (5α) of the screw (5) rotated by the screw (6), and is continuously and sequentially delivered toward the discharge channel (2).

Incidentally, the pitch of the reciprocating vanes & (5α) may be made smaller as it approaches the discharge pipe (2), and the pitch of the helical vanes (5 cL
) can also be increased as it approaches the discharge pipe (2). In addition, the height of the spiral blade (5α) is constant, and the distance between the screw (5) and the tube (3) is adjusted to the discharge pipe (2).
The tube (3) may be arranged so that it becomes narrower as it approaches the discharge pipe.Also, the 1Elr area of the tube (3) can be made smaller as it approaches the discharge pipe.

[Brief explanation of the drawing]

Fig. 1 is a partial front view of a conventional squeeze-type concrete pump, Fig. 2 is a schematic sectional view of a conventional screw-type concrete pump, and Fig. 6 is a partial view of an embodiment in which the present invention is applied to a concrete pump. Figure 4 is a sectional view taken along the line -■ in Figure 6. Hopper -11+, discharge pipe...(2J1 tube...(
3I. Screw... (Spiral blade to 5... (5a). Agent: Patent attorney Kaimoto Shimonori and 3 others

Claims (1)

[Claims] A tube made of a flexible material that connects a hopper that stores slurry such as fresh concrete and a discharge pipe, and a rotatably supported screw that includes a spiral blade that contacts and crushes the outer surface of the tube. A slurry pump comprising: