JP4601047B2 - Disturbance pump - Google Patents

Description

  In the present invention, after stirring earth, sand, etc. in dredging sites, civil engineering sites, sewage treatment plants, factory sedimentation basins, pits, manholes, etc., they are sucked while being diluted with water and discharged to desired locations. The present invention relates to a disturbance pump used for the purpose.

2. Description of the Related Art Conventionally, as a disturbance pump provided for the above-described purpose, an impeller casing having a suction opening in a central portion of a lower surface and having an impeller driven by a motor rotatably therein, and an upper portion are connected to a lower portion of the impeller casing. In addition, a cylindrical strainer having a plurality of suction flow openings in the peripheral wall, one end connected to the motor, and extending through the impeller casing and the central portion of the bottom plate of the strainer to extend below the cylindrical strainer. There is a disturbance pump having a rotating shaft and a stirring blade fixed to the lower end of the rotating shaft.
With the configuration described above, the rotating shaft rotates as the motor is driven, and the impeller and the stirring blade rotate integrally. A rotation of the stirring blade generates a downward water flow. As it is formed, the stirring flow can be sucked into the strainer through the suction flow opening and then discharged to the outside through the impeller casing.
In addition, in order to facilitate the generation of the downward water flow by the stirring blades, there are some in which a cylindrical or shade-shaped guide member is provided in the vicinity of the stirring blades.

However, in the conventional disturbance pump described above, a small-diameter cylindrical guide member having a plurality of openings is disposed so as to surround the stirring blade in a close state. A flow could not be formed. This problem becomes significant in a propeller type stirring blade that is most suitable for the formation of a downward flow.
Moreover, there is a possibility that the solid matter blown up by the stirring flow discharged by the stirring blade may be sucked into the cylindrical guide member again through the plurality of openings, and in this case, the stirred solid matter cannot be easily fried. It was.
The present invention has been made to solve the above-described conventional problems, and it is possible to separate a stirring flow and a suction flow by a flow path partition plate to ensure a smooth flow, and to use a propeller type stirring blade. Even when used as a stirring blade, a large suction area is secured around the stirring blade to reduce the resistance of the stirring flow and to ensure that the stirred solids return to the stirring blade again. An object of the present invention is to provide a disturbance pump capable of preventing and smoothly discharging solid matter to the outside.

(1) A disturbance pump according to the present invention includes an impeller casing having a suction opening in a central portion of a lower surface and rotatably incorporating an impeller driven by a motor, and an upper portion communicating with a lower portion of the impeller casing. The cylindrical pump side strainer provided with a plurality of suction flow openings on the peripheral wall, and the upper portion is connected to the lower portion of the pump side strainer via a non-porous channel partition plate, and the stirring flow opening is provided on the lower surface, And a non-porous stirring flow regulating cylinder having the same outer diameter as the pump side strainer, one end connected to the motor, an impeller casing, a pump side strainer, and a central portion of the flow path partition plate; And a stirring shaft fixed to a lower end of the rotating shaft. Here, as the stirring blade, it is preferable to use a propeller-type stirring blade capable of generating a strong downward water flow.

(2) The present invention is also characterized in that, in the configuration (1) described above, a skirt portion that gradually radiates outward is continuously provided at the lower portion of the stirring flow regulating cylinder.
(3) The present invention is characterized in that, in the configuration (1) described above, the flow path partition plate has a tapered shape that gradually rises upward from the outer peripheral edge toward the inner peripheral edge.

  As described above, in the present invention, the agitating flow and the suction flow are separated by the non-porous channel partition plate interposed between the pump side strainer and the stirring flow regulating cylinder, and a smooth flow is ensured. The solid body blown up by the stirring flow is effectively prevented from being sucked into the stirring blade again by the non-porous stirring flow regulating cylinder, and the solid matter is put into the impeller casing through the pump side strainer. Suction can be performed smoothly, and solids can be effectively discharged to the outside.

Hereinafter, the present invention will be described in more detail with reference to some embodiments shown in the accompanying drawings. In all of the embodiments described below, components having the same structure and function are denoted by the same reference numerals, and redundant description for each embodiment is omitted.
(First embodiment)
First, the configuration of the disturbance pump A1 according to the present embodiment will be described with reference to FIG. 1 and FIG.
As shown in the figure, a disturbance pump A1 according to the present embodiment includes an impeller casing 12 having a suction opening 10 at the center of the lower surface and rotatably incorporating an impeller 11 driven by a motor (not shown). A cylindrical pump-side strainer 14 having an upper portion connected to the lower portion of the impeller casing 12 and a plurality of suction flow openings 13 formed on the peripheral wall, and an upper portion having a non-porous flow path below the pump-side strainer 14. While connecting through the partition plate 15 and providing a stirring flow opening on the lower surface, and connecting a non-porous stirring flow regulating cylinder 17 having the same outer diameter as the pump side strainer 14 and one end to the motor, A rotating shaft 18 extending through the impeller casing 12, the pump side strainer 14, and the central portion of the flow path partition plate 15 into the stirring flow regulating cylinder 17, and the rotating shaft 1 Comprising a propeller type stirring blade 19 which is an example of a stirring blade to be secured to the lower end. In the configuration described above, the impeller 11 is fixed to the rotating shaft 18. Further, in this embodiment, the stirring flow regulating cylinder 17 has a bottom plate 17a at the lower portion thereof, and the propeller type stirring blade 19 is disposed in an opening 17b provided in a central portion of the bottom plate 17a. In this embodiment, the stirring flow opening is formed by a plurality of stirring flow openings 17c provided in the bottom plate 17a.
The other components in the figure will be described. 20 represents a discharge pipe, 21 represents a motor casing, and 22 represents a pump support leg.

Next, the operation of the disturbance pump A1 having the above-described configuration will be described.
As the motor is driven, the rotating shaft 18 rotates and the impeller 11 and the propeller type stirring blade 19 rotate integrally. With the rotation of the propeller type stirring blade 19, the rotating shaft 18 is arranged below the stirring flow regulating cylinder 17 in FIG. After passing through the stirring flow opening 17c, which is an example of the stirring flow opening provided in the provided bottom plate 17a, and flowing into the stirring flow restricting cylinder 17, a downward water flow is generated that flows downward, and the downward water flow causes sediment and sand to flow. Are stirred to form the stirring flow F1, and the stirring flow F1 is swirled outside the disturbance pump A1, and then sucked into the strainer through the suction flow opening 13 as the suction flow F2, and then the impeller casing 12 and the discharge pipe 20 can be discharged to the outside.
At this time, in this embodiment, the non-porous flow path partition plate 15 interposed between the pump side strainer 14 and the stirring flow restricting cylinder 17 separates the stirring flow F1 and the suction flow F2 and makes smooth. Since the flow can be secured and the outer diameter of the stirring flow regulating cylinder 17 is made equal to the outer diameter of the pump side strainer 14, even when the propeller type stirring blade 19 is used as the stirring blade, It is possible to secure a wide suction area around the blades, reduce the resistance received by the stirring flow F1, and improve the stirring performance. Further, the non-porous stirring flow restricting cylinder 17 effectively prevents the solid matter blown up by the stirring flow F1 from being sucked into the propeller-type stirring blade 19 again. Thus, the air can be smoothly sucked into the impeller casing 12 and the solid matter can be effectively discharged to the outside.

(Second embodiment)
3 and 4 show the configuration of the disturbance pump A2 according to the second embodiment. As shown in the figure, this embodiment is compared with the first embodiment shown in FIG. 1 and FIG. 2, and a skirt portion 23 that gradually spreads radially outward toward the lower portion of the stirring flow regulating cylinder 17. It has the feature that it was connected continuously.
With the above-described configuration, the stirring flow F1 can be more smoothly formed while maintaining the effect of preventing the above-described solid matter from being sucked into the propeller-type stirring blade 19 again.

5 and 6 show the configuration of the disturbance pump A3 according to a modification of the second embodiment shown in FIGS. As shown in the figure, in this modification, the stirring flow restriction except for the central portion where the propeller type stirring blade 19 is disposed by completely removing the bottom plate 17e provided at the lower portion of the stirring flow restriction cylinder 17 is provided. It is characterized by being formed by the entire bottom surface of the cylinder 17 for use.
With such a configuration, the stirring flow F1 can be more smoothly formed while maintaining the effect of preventing the solid matter from being sucked again into the propeller-type stirring blade 19, and the structure of the disturbance pump A3 is simplified. be able to.

(Third embodiment)
FIG. 7 shows the configuration of the disturbance pump A4 according to the third embodiment. As shown in the figure, in this example, in contrast to the first example shown in FIGS. 1 and 2, the flow path partition plate 24 has a tapered shape that gradually rises upward from the outer peripheral edge toward the inner peripheral edge. It has a special feature.
With the above-described configuration, the suction area of the suction flow F2 can be increased, and the suction flow F2 can be smoothly guided into the impeller casing 12 using the tapered surface.

  The disturbance pump according to the present invention can be effectively used particularly in dredging sites, civil engineering sites, sewage treatment plants, factory sedimentation basins, pits, and manholes.

The partial cross section front view of the disturbance pump which concerns on 1st Example of this invention. The cross-sectional view by the II line | wire of FIG. The partial cross section front view of the disturbance pump which concerns on 2nd Example of this invention. FIG. 4 is a cross-sectional view taken along line II-II in FIG. 3. The partial cross section front view of the disturbance pump which concerns on the modification of 2nd Example of this invention. The cross-sectional view by the III-III line of FIG. The partial cross section front view of the disturbance pump which concerns on 3rd Example of this invention.

Explanation of symbols

A1 to A4: disturbance pump F1: stirring flow F2: suction flow 10: suction opening 11: impeller 12: impeller casing 13: suction flow opening 14: pump side strainer 15: flow path partition plate 17: cylinder for stirring flow regulation 17a: Bottom plate 17b: Opening 17c: Stirring flow opening 18: Rotating shaft 19: Propeller-type stirring blade 20: Discharge pipe 21: Motor casing 22: Pump support leg 23: Skirt portion 24: Channel partition plate

Claims (3)

An impeller casing having a suction opening at the center of the lower surface and rotatably incorporating an impeller driven by a motor inside;
A cylindrical pump side strainer in which the upper part is connected to the lower part of the impeller casing and the peripheral wall is provided with a plurality of suction flow openings,
The upper part is connected to the lower part of the pump-side strainer via a non-porous channel partition plate, and an opening for stirring flow is provided on the lower surface, and the non-porous stirring flow regulation has the same outer diameter as the pump-side strainer. A cylinder,
A rotating shaft that connects one end to the motor and extends through the impeller casing, the pump side strainer, and the central portion of the flow path partition plate into the stirring flow regulating cylinder,
A disturbance pump comprising a stirring blade fixed to a lower end of the rotating shaft.   The disturbance pump according to claim 1, wherein a skirt portion gradually extending radially outward toward a lower portion is continuously provided at a lower portion of the stirring flow regulating cylinder. The disturbance pump according to claim 1, wherein the flow path partition plate has a tapered shape that gradually rises upward from the outer peripheral edge toward the inner peripheral edge.

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