JPH03121292A - Slurry pump - Google Patents

Abstract

PURPOSE:To completely continue long distance transport without diluting sediment of a high concentration with water by directly coupling a spiral pump to a screw conveyer having an intake port on one end and making a rotation axis of the screw conveyer and a rotation axis of the spiral pump in common. CONSTITUTION:A spiral pump 3 is directly coupled to a screw conveyer 2 and a screw 2b of the screw conveyer and an impeller of the spiral pump 3 are rotated at a high speed with a common axis 7. An object to be transported is put into a hopper 10 and led to an intake port 2a of the screw conveyer 2 while it is mixed by an agitator 10a. The object put into the screw conveyer 2 is pressure-fed forward by thrust due to a rotation of the screw 2b to enter the spiral pump 3. A pressure is applied to the object by a centrifugal function of the impeller 3a rotating at a high speed with the rotation axis 7 common to the screw of the screw conveyer in the spiral pump 3, and the object is sequentially supplied to a distribution pipe 8 via a discharge port 3c to be transferred.

Description

[Detailed description of the invention] [Industrial application field] The present invention is directed to transport materials in the form of mud, such as settling ponds.

This product relates to slurry pumps that are used to suck up and transport highly concentrated sediments in sewage treatment plants, etc.

[Conventional technology] Conventionally used slurry pumps include centrifugal pumps, but the suction power is too weak to suck up highly concentrated materials with low water content, such as sediment, and it is difficult to remove the sediment. In many cases, it is not possible to suction sufficiently, and in such cases, it is unavoidable to dilute with water to lower the concentration before suctioning.

Furthermore, even if you are lucky enough to be able to inhale it at a high concentration, there will be no problem in short-distance transportation, but long-distance transportation will be extremely difficult, and the power equipment may become clogged or overloaded.
Motor) burnout problems could occur.

[Problems to be solved by the invention] From the above background, it has been desired to develop a slurry pump that can safely and continuously transport highly concentrated precipitates without diluting them with water. Ta.

[Means for Solving the Problems] In the present invention, in order to solve the above problems, the first
In the invention, a volute pump is directly connected to a screw conveyor having an intake port at one end, and the rotation axis of the screw conveyor and the rotation axis of the volute pump are made common.

Moreover, in the second invention, a nozzle for compressed air injection is provided after the discharge port of the slurry pump of the first invention.

[Function] The slurry pump of the present invention immerses the screw part of the screw conveyor in the sediment, forcibly takes in the sediment at a high concentration, and uses the thrust of the screw to connect the downstream volute pump directly to the screw conveyor. Since the precipitate is pressed against the precipitate, the precipitate strongly enters the centrifugal pump, and is then sent out to the discharge port side by centrifugal action by the impeller of the centrifugal pump, enabling long-distance transportation. Furthermore, in the second aspect of the invention, since compressed air is further injected from the nozzle into the sediment discharged from the discharge port, the long ratio aS feeding is further promoted by imparting this air energy.

[Examples] Examples according to the present invention will be described in detail below based on the drawings.

1 and 2 show an embodiment of the present invention, with FIG. 1 showing an overall vertical sectional view and FIG. 2 showing an overall side view.

In the figure, l is a slurry pump, 2 is a screw conveyor, 3 is a centrifugal pump, 4 is a motor, 5 is a coupling,
6 is an intermediate shaft, 7 is a common rotating shaft, 8 is a discharge pipe, 9 is a compressed air injection nozzle, 10 is a hopper, 20 is a check valve, 30
is a screen to prevent foreign matter from entering.

In the embodiment shown in FIG. 1, highly concentrated sediment is received in the hopper 10 and then transported downstream by the slurry pump 1. In contrast, in the embodiment shown in FIG. The suction port of the slurry pump 1 is buried in the material, and the material is transported directly to the downstream discharge pipe.

First, the structure and operation of the embodiment shown in FIG. 1 (first embodiment) will be explained.

The material to be transported is first put into the hopper IO, and guided to the suction port 2a of the screw conveyor 2 while being kneaded by the stirrer 10a. The transported material entering the screw conveyor 2 is forced forward by the thrust generated by the rotation of the screw 2b and enters the centrifugal pump 3. Inside the centrifugal pump 3, pressure is applied to the transported material by the centrifugal action of the impeller 3a, which rotates at high speed by a rotating shaft 7 common to the screw of the screw conveyor, and the discharge port 3C
The objects to be transported are sequentially fed to the discharge pipe 8 and conveyed.

Here, in the second invention, the discharge pipe 8 is provided with a compressed air injection nozzle 9, compressed air of 3 to 10 kg/cm'G is injected, and the transported object is transported further away by air energy. be done. In addition.

The slurry pump is provided with a seal 2d and a seal 3d to prevent the transported material from leaking toward the bearing 2C and the motor.

In addition, in the embodiment shown in FIG. 2 (second embodiment), it is used to directly collect and transport sludge accumulated in sedimentation ponds and the seabed, and the transported material passes through a screen 30 and is sucked into the screw conveyor 2. The material is lifted vertically by a screw (vane), and centrifuged by a centrifugal pump and transported in the direction of the discharge pipe 8. Then, compressed air is injected through an injection nozzle, and with the help of air conveyance, long-distance transportation is realized. In addition.

The check valve 20 is operated by the slurry pump 1 by the injected compressed air.
This is to prevent the transported items from flowing backward to the side, and may be similarly provided in the first embodiment.

As explained above, in the present invention, since the screw conveyor and the centrifugal pump are integrally and directly connected, highly concentrated sediment can be safely transported over long distances. Furthermore, in the second invention, since compressed air is applied, even longer distance transportation can be realized.

[Effects of the Invention] As described above, the present invention has a structure in which a centrifugal pump is directly connected to a screw conveyor, and the screw and impeller rotate at high speed on a common shaft, so that highly concentrated sediment can be taken in without any problem. Moreover, it can be powerfully discharged and can be continuously transported over long distances.

Furthermore, in the second invention, since a nozzle for injecting compressed air is provided after the discharge port of the slurry pump, transportation over a further long distance can be realized.

[Brief explanation of drawings]

1 and 2 show an embodiment of the present invention, with FIG. 1 being an overall vertical sectional view and FIG. 2 being an overall side view. 1... Slurry pump, 2... Screw conveyor,
3... Volute pump, 4... Motor, 7... Common rotating shaft, 8... Exhaust pipe, 9... Compressed air injection nozzle, 0... Check valve, 0. ...Screen to prevent foreign matter from entering.

Claims (2)

[Claims] (1) A slurry pump characterized in that a centrifugal pump is directly connected to a screw conveyor having an intake port at one end, and the rotation axis of the screw conveyor and the centrifugal pump are common. (2) The slurry pump according to claim 1, further comprising a nozzle for injecting compressed air after the discharge port of the slurry pump.