JP5137735B2 - Submersible pump - Google Patents

Description

  The present invention relates to an underwater agitation pump used for, for example, agitation and mixing of bentonite at a construction site, agitation of muddy water, agitation in a sludge tank at a sewage treatment facility, and the like.

In the conventional fluid agitation device, the output shaft of the submersible motor to which the impeller is fixed is surrounded by a pump casing having a suction port at the lower end and a discharge port on the peripheral surface, and the ejection direction can be selected for the discharge port A jet nozzle with a small diameter or a flexible hose with a small diameter is attached, and a porous strainer is connected to the lower end of the pump casing, and the output shaft is further lowered through a through hole provided in the suction port and the porous strainer. A fluid agitation device (see, for example, Patent Document 1) configured to protrude into a protruding portion and a stirring blade fixed to the protruding end is known.
JP 56-115626 (Fig. 1-7)

  However, in the conventional fluid agitation apparatus of Patent Document 1, it is certain that the agitation blade is attached to the bottom surface by the agitation flow pumped toward the bottom surface by the rotation of the agitation blade. The suction water flow is reduced by reducing the opening area of the suction port, and the pumping agitating flow in the bottom direction by the stirring blades directly below the suction port against the suction flow direction to the suction port causes the water absorption resistance to the suction port. In combination with the fact that the amount of water absorption further decreases, the amount of water discharged from the pump casing inevitably decreases, and in addition to the power consumed in driving the stirring blades, the discharge port Since the power consumed for the water flow from the nozzle is also reduced, the amount of discharged water is further restricted. Therefore, a desired jet flow velocity cannot be obtained unless the outlet diameter is reduced as in the case of the jet nozzle. Since the kibble hose can only function if it is a small hose with a small diameter, it must naturally be selected in a predetermined direction in the aquarium because the jet range is limited to a small diameter and the jet range is limited, The action effect of the stirring blade is effective for floating the sediment deposited on the bottom surface, but as is well known, it is necessary to transport and stir a large amount of the processing liquid in the tank in order to sufficiently stir the inside of the tank. As described above, since the amount of discharged water is restricted by the mounting of the stirring blades and a large amount of stirring water cannot be obtained, there is a problem that the agitation in the tank is counterproductive.

  The present invention eliminates the above-mentioned problems, and absorbs a large amount without restricting the suction port into the vortex chamber and jets a large amount of discharge water, thereby allowing a small-diameter auxiliary stirring vibration discharge pipe In addition to stirring the sediment deposited on the bottom surface of the pump installation without providing a stirring blade, and providing a large-diameter main agitating discharge pipe for main stirring, the discharge direction of the jet flow changes randomly. It is an object of the present invention to provide an underwater agitation pump that can perform an effective agitation action over the entire area of the agitation tank without causing blind spots.

  In the present invention, a suction port having a full opening is provided on the lower surface of a vortex chamber that does not have a discharge port for pumping water, and a plurality of discharge ports for jet agitation led out from the peripheral side portion into a volute (vortex) shape of equal opening are provided. In the submerged agitation pump, a large-diameter main agitating discharge pipe for straight agitating the derivation of the volute shape in the horizontal direction to the discharge port and a small diameter leading down the pump installation The main feature is that each of the auxiliary stirring vibration discharge pipes is connected.

  According to the submerged agitation pump of the present invention, a large-diameter main agitating discharge pipe for main agitation made of a soft elastic body such as rubber and a small-diameter auxiliary agitating discharge pipe for auxiliary agitation are connected to each discharge port. Thus, the suction port is completely opened without providing a stirring blade, and a large amount of water is absorbed when the pump is driven, and a large amount of discharge water of all discharge pressure generated in the vortex chamber is spouted to connect to the discharge port. A so-called dance phenomenon occurs in each of the small-diameter auxiliary agitating discharge pipe and the large-diameter main agitating discharge pipe. Effective in the entire stirring tank without any blind spots due to random changes in the jet direction of each of the jets of a large amount of horizontal agitation by the main agitable discharge pipe as well as downward agitation to the bottom of the pump installation Agitation There is the advantage of obtaining.

  In addition, by providing a vibration discharge pipe for auxiliary stirring instead of the stirring blade, there is no deterioration in the downward stirring performance to the bottom of the pump installation due to wear of the stirring blade, etc., and it is not necessary to replace the stirring blade. In addition, since the maintenance is easy, it has an effect of contributing to the stability of the stirring action in the stirring tank.

  An embodiment of the submerged agitation pump of the present invention will be described in detail with reference to FIGS. 1 and 2 of the accompanying drawings based on examples.

  1 and 2, reference numeral 1 denotes a vortex chamber without an outlet for pumping water in which an impeller 2 is installed, 3 denotes a suction port with a full opening provided on the lower surface of the vortex chamber 1, 4. A plurality of discharge ports for jet agitation led out from the peripheral side of the chamber 1 in a substantially tangential volute (vortex) shape, and the discharge ports 4. The large-diameter main agitating discharge pipes 5m, 5m, and 5m, which are preferably linearly extended in the horizontal direction and made the same diameter as the discharge ports 4, 4 And the small-diameter auxiliary stirring vibration discharge pipes 5 s. Therefore, when the pump is driven, a so-called dance phenomenon occurs in the large-diameter main-vibration discharge pipes 5m, 5m and the small-diameter auxiliary discharge pipes 5s, 5s, and the discharge direction of the jet changes randomly. To do.

The top view of the submerged stirring pump which concerns on this invention. The principal part vertical side view of the submerged stirring pump which concerns on this invention.

Explanation of symbols

1 Vortex chamber 3 Suction port 4 Discharge port 5m Vibratory discharge tube for main stirring 5s Vibratory discharge tube for auxiliary stirring

Claims (1)

Underwater in which a suction port with a full opening is provided on the lower surface of a vortex chamber that does not have a discharge port for pumping water and a plurality of discharge ports for jet agitation led out from the circumferential side into a volute (vortex) shape of equal opening In the agitation pump, a large-diameter main agitating discharge pipe for straight stirring that directly leads out the volute to the discharge port in the horizontal direction, and a small-diameter auxiliary agitating pipe that is guided directly below the pump installation. A submerged agitation pump characterized by connecting each with a vibrating discharge pipe.

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