JP2014218978A - Submerged disturbance pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a submerged disturbance pump in which supernatant water is positively introduced to dilute sludge and the like and either sludge or sand and the like are efficiently sucked up by some agitating vanes.SOLUTION: This invention relates to a submerged disturbance pump 10 comprising an impeller 14 arranged at an intermediate part of a rotating shaft 13 rotationally driven by a motor 12; an impeller casing 11 having a suction port 25 at a lower central side of the impeller 14 and a water discharging port 16 at a side part; a cylindrical pump side strainer 22 communicated with and connected to the lower part of the impeller casing 11 and provided with a plurality of suction ports 20 at a circumferential wall 19; a cylindrical body 27 for restricting agitation flow having its upper part connected to the lower part of the pump side strainer 22 through a partition plate 26 and having its lower part acting as an opening; and agitating vanes 30 which are partly or totally stored in the cylindrical body 27 for restricting agitation flow and attached to the lower part of the rotating shaft 13. The side part of the cylindrical body 27 for restricting agitation flow is provided with a conducting tube 40 for supplying water to the agitating vanes 30 and discharging it downwardly.

Description

In the present invention, the sediment at the bottom of the dredging site, civil engineering site, sewage treatment plant, factory waste liquid sedimentation basin, etc. is lifted by the stirring blade, and then sucked while being diluted with the surrounding water and discharged to the desired location. The present invention relates to an underwater disturbance pump used for the operation.

Conventionally, Patent Document 1 discloses an underwater disturbance pump that serves the above-described purpose. As shown in FIGS. 7A and 7B, this submerged disturbance pump 70 has a propeller-type agitating blade 73 coaxially attached to the lower part of a pump shaft 72 having an impeller 71 attached to the upper part, and is directed toward the bottom of the water. By causing the water flow, the bottom sediment is levitated and sucked from the suction flow strainer 76 at the top of the flow path partition plate 75, and is discharged to the outside by the discharge pipe 78 outside the impeller 71 attached to the pump shaft 72. It is discharging. Reference numeral 79 denotes a pump support leg.

JP 2006-132455 A

However, as shown by diagonal lines in FIG. 7A, when the precipitate 80 is at the bottom of the water and the stirring blade 73 is buried in the precipitate 80, there is a problem that the water flow does not occur and the stirring ability is reduced. is there.
Moreover, when there are many solids such as sand and gravel at the bottom of the water, the precipitate 80 is directly stirred by the propeller type stirring blade 73, so that there is a problem that the wear is severe and the durability is lowered.

The present invention has been made in view of such circumstances, and an object thereof is to provide an underwater disturbance pump that actively introduces supernatant water, dilutes sludge and the like, and efficiently pumps sludge or sand and the like with a stirring blade. To do.

The submerged disturbance pump according to the first aspect of the invention that meets the above-described object is: 1) an impeller provided at an intermediate portion of a rotary shaft that is rotationally driven by a motor provided at an upper portion; and 2) suction at a lower center of the impeller An impeller casing having a drain on the side, and 3) a cylindrical pump-side strainer in which the upper part communicates with the lower part of the impeller casing and a plurality of suction openings are provided in the peripheral wall; and 4) the upper part Is connected to the lower part of the pump side strainer via a partition plate, and the lower part is an opening for the stirring flow regulating cylinder, and 5) a part or all of the inside is stored in the stirring flow restriction cylindrical body And an underwater disturbance pump having a stirring blade attached to a lower part of the rotating shaft,
A water guide pipe that supplies water to the stirring blade and discharges it downward is provided at a side portion of the cylindrical body for stirring flow regulation. (Disclosed in FIGS. 1 and 2)

The underwater disturbance pump according to a second aspect of the present invention is the underwater disturbance pump according to the first aspect of the present invention, wherein a water absorption side strainer is provided at the upper end of the water conduit. (Disclosed in FIG. 1)
An underwater disturbance pump according to a third invention is the underwater disturbance pump according to the first and second inventions, wherein a plurality of the water conduits are provided. (Disclosed in FIG. 4) In the submerged disturbance pumps according to the first to third inventions and the fourth to seventh inventions, the stirring blades may be propellers or cutter fans.

An underwater disturbance pump according to a fourth aspect of the present invention is the underwater disturbance pump according to the first to third aspects of the invention, wherein the water conduit is made of a pipe or a hose. (Disclosed in FIGS. 1 and 5)
The underwater disturbance pump according to a fifth aspect of the present invention is the underwater disturbance pump according to the first to fourth aspects of the invention, wherein an outer diameter of the stirring flow regulating cylindrical body is smaller than an outer diameter of the pump side strainer. (Disclosed in FIGS. 1 to 6)

An underwater disturbance pump according to a sixth aspect of the present invention is the underwater disturbance pump according to the first to fifth aspects of the present invention, wherein the lower side of the stirring flow regulating cylindrical body is enlarged in a trumpet shape. (Disclosed in FIG. 6A)
And the underwater disturbance pump which concerns on the 7th invention is the underwater disturbance pump which concerns on the 1st-5th invention, The said cylindrical body for stirring flow control has a truncated cone shape. (Disclosed in FIG. 6B)

In the underwater disturbance pump according to the present invention, a water guide pipe that supplies water to the stirring blade and discharges it downward is provided on the side portion of the cylindrical body for stirring flow regulation. Even when sucked into the blade and discharged vigorously downward and the bottom of the pump is buried in the sediment, a water flow can be generated by the stirring blade, and the surrounding sediment can be suspended and efficiently sucked up.
Furthermore, since the contact between the stirring blade and the solid material is suppressed, wear of the stirring blade is suppressed, and the durability as a pump is improved.

(A) is a sectional side view of the submersible pump according to the first embodiment of the present invention, (B) is a sectional view taken along line AA ′ in (A), and (C) is a sectional view taken along line BB ′ in (A). It is sectional drawing. It is a sectional side view of the use condition of the submerged disturbance pump. It is a sectional side view of the submerged disturbance pump which concerns on the 2nd Embodiment of this invention. It is sectional drawing of the submerged disturbance pump which concerns on the 3rd Embodiment of this invention. It is a sectional side view of the submerged disturbance pump which concerns on the 4th Embodiment of this invention. (A) is explanatory drawing of the underwater disturbance pump which concerns on the 5th Embodiment of this invention, (B) is explanatory drawing of the underwater disturbance pump which concerns on the 6th Embodiment of this invention. (A) is a sectional side view of the submerged disturbance pump which concerns on a prior art example, (B) is D-D 'sectional drawing in (A).

Next, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 (A) to 1 (C), an underwater disturbance pump 10 according to a first embodiment of the present invention includes a flange-mounted motor 12 provided on an upper portion of an impeller casing 11, and an impeller casing. 11, an impeller 14 that is provided at an intermediate portion of the rotating shaft 13 of the motor 12 and is rotationally driven by the motor 12.

A side of the impeller casing 11 is provided with a drainage port 16 formed of a bent pipe bent at 90 degrees, and a flange 17 is provided on the drainage port 16 to provide other pipes (including a metal pipe, a synthetic resin pipe, and a hose) 18. Can be joined.

At the lower part of the impeller casing 11, an upper part of a cylindrical pump side strainer 22 having a plurality of suction openings 20 provided in the peripheral wall 19 is provided in communication with the lower part of the impeller casing 11 (lower center of the impeller 14). ) Forms a suction opening (suction port) 25, and the rotation shaft 13 is inserted through the center, and forms a suction port through which liquid (water) that has passed through the pump side strainer 22 is sucked into the impeller casing 11.

A partition plate 26 is provided at the lower portion of the pump side strainer 22, and an agitating flow restricting cylindrical body 27 is provided in alignment with the partition plate 26. A shaft hole 28 is provided at the center of the partition plate 26, and the rotating shaft 13 is inserted with a slight gap.
The upper part of the stirring flow restricting cylindrical body 27 is closed by the partition plate 26 and the lower part is opened (opened), and a part or all of the stirring blades 30 fixed to the lower part of the rotating shaft 13 have a gap inside. It is arranged.

In this embodiment, as shown in FIGS. 1 (A) and 1 (C), the stirring blade 30 has a plurality of blades 31 arranged axially symmetrically. For example, Japanese Patent No. 3696573, As described in Japanese Patent No. 3672505, it may be a cutter fan that generates a downward water flow to stir and lift the sediment.
As shown in FIGS. 1B and 1C, the outer diameter of the stirring flow regulating cylindrical body 27 is smaller than the outer diameter of the cylindrical pump-side strainer 22 (for example, 0.5 to 0.8 times). ), An annular plate 34 provided with a second suction opening 33 is provided around the partition plate 26, and the liquid is sucked into the pump side strainer 22 from the outside of the annular plate 34.

A leg member 35 is provided at the bottom of the cylindrical pump side strainer 22, and the submersible pump 10 can be erected on the bottom of the water. In this embodiment, the leg member 35 has four rods 36 and a ring 37 disposed at the bottom of the rod 36. The stirring blade 30 is disposed at an intermediate position in the vertical direction of the leg member 35 and inside the leg member 35.

And in this embodiment, the lower end part of the water conduit 40 which consists of a pipe is connected with the side part of the cylindrical body 27 for stirring flow control, for example. This water conduit 40 has a bent portion 41 in the middle, extends above the impeller casing 11, and is provided with a water absorption side strainer 42 at the tip. The water conduit 40 guides the upper water liquid into the stirring flow regulating cylindrical body 27 and is always disposed in water.

Then, operation | movement and an effect | action of this submerged disturbance pump 10 are demonstrated, referring FIG. 1 (A)-(C) and FIG.
As shown in FIG. 2, the underwater disturbance pump 10 is disposed in a state where it is placed on the bottom of the water having the precipitate 43. When power is supplied to the motor 12 via the cord 44, the motor 12 rotates in a certain direction. The motor 12 is rotated in the direction in which the water flow by the rotating stirring blade 30 flows downward.

As a result, the clean water that does not contain the precipitate 43 is introduced into the stirring flow regulating cylindrical body 27 through the water conduit 40 and is sprayed toward the bottom of the water by the stirring blade 30 that is rotationally driven.
On the other hand, since the impeller 14 is rotationally driven by the motor 12, a water flow is generated from the center toward the outside in the radial direction, and diluted through the suction opening 20 and the second suction opening 33 of the pump side strainer 22. The liquid containing the precipitate 43 in the wet state is drawn into the impeller casing 11 from the center of the bottom and is discharged to the outside through the pipe 18.

In this case, since the stirring blade 30 does not directly hit the sediment 43 at the bottom of the water, the wear of the stirring blade 30 is not promoted and has a long life.
Even when sand is contained in the bottom of the water, the stirring blade 30 is once expelled to the outside of the leg member 35, so that the wear of the stirring blade 30 is not promoted.

Subsequently, an underwater disturbance pump 45 according to a second embodiment of the present invention will be described with reference to FIG. In addition, about the component same as the submerged disturbance pump 10 which concerns on 1st Embodiment, the same code | symbol is described and these detailed description is abbreviate | omitted (the same also in the following embodiment).

In the second embodiment of the present invention shown in FIG. 3, a cutter fan 46 is used as a stirring blade. The cutter fan 46 has a function of generating a water flow downward, mainly stirring the precipitates and floating up, and makes it easy to suck with a pump. Moreover, in FIG. 3, the water absorption side strainer is abbreviate | omitted.

FIG. 4 shows an underwater disturbance pump 48 according to a third embodiment of the present invention. A plurality of water conduits 49 are provided at equal angles around the stirring flow regulating cylindrical body 27. As a result, the clean water can be sucked from the periphery of the stirring flow regulating cylindrical body 27 and blown downward by the stirring blade 30. The abrading blade 30 is less worn and the other effects are the same as in the first and second embodiments.

FIG. 5 shows an underwater disturbance pump 50 according to a fourth embodiment of the present invention, in which a hose 51 is used as a water guide pipe for supplying a clean water into the stirring flow regulating cylindrical body 27. In this embodiment, the lower end of the hose 51 is connected to a plurality (four in this example) of connection ports 52 arranged at an equal angle. The upper portion of the hose 51 is supported by the outer case of the motor 12 via a support member 53. Moreover, it is preferable to provide a water absorption side strainer at the upper end of the hose 51. Further, a buoyancy material can be provided at the upper end of the hose 51, and the upper end of the hose 51 can be held at a position higher than the impeller casing 11.

Next, submerged disturbance pumps 55 and 56 according to fifth and sixth embodiments of the present invention shown in FIGS. 6 (A) and 6 (B) will be described. In the underwater disturbance pump 55 according to the fifth embodiment, the stirring flow regulating cylindrical body 57 whose lower part is enlarged in a trumpet shape is used, and in the underwater disturbance pump 56 according to the sixth embodiment, the lower side A cylindrical body 58 for restricting the agitating flow having a truncated cone shape that gradually increases in diameter is used. In any case, the stirring blade 30 is provided in the stirring flow regulating cylindrical body.

About the operation | movement of the submerged disturbance pump which concerns on 2nd-6th embodiment, it is the same as the submerged disturbance pump which concerns on 1st Embodiment.
The present invention is not limited to the above-described embodiment, and the configuration thereof can be changed without changing the gist of the present invention. For example, the case where an underwater disturbance pump is constituted by taking a part of the underwater disturbance pumps according to the first to sixth embodiments is also applied.

10: submersible pump, 11: impeller casing, 12: motor, 13: rotating shaft, 14: impeller, 16: drain, 17: flange, 18: piping, 19: peripheral wall, 20: suction opening, 22: pump Side strainer, 25: suction opening, 26: partition plate, 27: cylindrical body for stirring flow regulation, 28: shaft hole, 30: stirring blade, 31: blade, 33: second suction opening, 34: annular plate , 35: leg member, 36: rod, 37: ring, 40: water guide pipe, 41: bent part, 42: suction side strainer, 43: sediment, 44: cord, 45: submersible pump, 46: cutter fan, 48: underwater disturbance pump, 49: water guide pipe, 50: underwater disturbance pump, 51: hose, 52: connection port, 53: support member, 55, 56: underwater disturbance pump, 57, 58: cylindrical body for stirring flow regulation

Claims (7)

1) an impeller provided at an intermediate portion of a rotating shaft that is rotationally driven by a motor provided at an upper portion; 2) an impeller casing having a suction opening at a lower center of the impeller and a drain outlet at a side portion; The upper part is connected to the lower part of the impeller casing, and a cylindrical pump side strainer having a plurality of suction openings on the peripheral wall. 4) The upper part is connected to the lower part of the pump side strainer via a partition plate. A stirring flow regulating cylindrical body having an opening at the bottom, and 5) a stirring blade that is partly or entirely housed inside the stirring flow regulating cylindrical body and attached to the lower portion of the rotating shaft. In submersible disturbance pump having
An underwater disturbance pump characterized in that a water guide pipe for supplying water to the stirring blade and discharging it downward is provided on a side portion of the stirring flow regulating cylindrical body. The underwater disturbance pump according to claim 1, wherein a water absorption side strainer is provided at an upper end portion of the water guide pipe. The underwater disturbance pump according to claim 1 or 2, wherein a plurality of the water guide pipes are provided. The underwater disturbance pump of any one of Claims 1-3 WHEREIN: The said water conduit consists of a pipe or a hose, The underwater disturbance pump characterized by the above-mentioned. The submerged disturbance pump of any one of Claims 1-4 WHEREIN: The outer diameter of the said stirring body flow control cylinder is smaller than the outer diameter of the said pump side strainer, The submerged disturbance pump characterized by the above-mentioned. The submerged disturbance pump of any one of Claims 1-5 WHEREIN: The lower side of the said cylindrical body for stirring flow control is diameter-expanding in the trumpet shape, The submerged disturbance pump characterized by the above-mentioned. The submerged disturbance pump of any one of Claims 1-5 WHEREIN: The said cylindrical body for stirring flow control has a truncated cone shape, The submerged disturbance pump characterized by the above-mentioned.

Images