JP4588353B2 - Submersible sand pump - Google Patents

Description

  The present invention relates to a submersible sand pump, and in particular, by controlling so as to keep the sand content by pump suction regardless of the amount of sand that flows into or accumulates in a sand basin, the sand sinking so as not to be buried by a large amount of inflow soil. The present invention relates to a submersible sand pump that efficiently sucks up the water and prevents pump clogging by controlling the embedding of the pump and sand content and improving the reliability of the subsequent equipment.

  Conventionally, underwater sand pumps are frequently used as a method of sanding sand accumulated in a sand basin. This submersible sand pump mixes sand and water by digging and rolling up the accumulated sand by injecting pressure water for digging with a drilling nozzle arranged in the vicinity of the suction port of the submersible sand pump. This is sucked from the suction pipe of the submersible sand pump, and pressure is generated by a rotating impeller in the submersible sand pump so that the sand is pumped to a predetermined head.

  By the way, the conventional submersible sand pump excavates the sand accumulated by the excavating nozzle, rolls it up, and sucks the mixture of sand and water from the suction pipe of the submersible sand pump. When the amount of inflow is large, the amount of sand rolled up by the drilling nozzle is inevitably increased, and the mixing ratio (sand content) of the suction water by the submersible sand pump is increased. The rate is low and the sand content is not constant.

For this reason, in this submersible sand pump, the sand content of the submersible sand pump varies greatly depending on the amount of sand inflow or sedimentation, and the sand content cannot be controlled to be constant. There was a problem that it could not be improved.
Further, when the sedimentation sand is cut by the excavation nozzle, the surrounding sand collapses, and there is a problem that a large amount of sand enters the suction portion of the submersible sand pump and closes the suction portion.
Furthermore, when a large amount of earth and sand has flowed into the settling basin at a time, such as during rainfall, the submersible sand pump is buried, making it impossible to lift sand.

  In view of the problems of the conventional submersible sand pump, the present invention sucks up the sand by controlling the sand content by the submersible pump regardless of the amount of sand inflow or sedimentation, and is also buried by a large amount of inflowing sand. An object of the present invention is to provide a submersible sand pump that improves the reliability by preventing the pump from being sucked up at the same time, prevents blockage of the pump by sand content control, and improves the reliability of the subsequent equipment.

In order to achieve the above object, the submersible sand pump of the present invention is a submersible sand pump in which a suction pipe is provided below the rotation shaft of the impeller, and a cylindrical pre-swirl tank is provided below the suction pipe. A swirl flow nozzle for supplying pressure water in a tangential direction to the pre-swirling tank is attached, and a rod-shaped drilling rod that projects from the rotating shaft of the impeller in the vertical direction downward from the pre-swirling tank to excavate the sand by an underwater motor. It is characterized by being extended so as to rotate in the same direction at the same rotational speed as the impeller and in the direction opposite to the direction of the swirl flow by the swirl flow nozzle .

In this case, it is possible to provide a guide pipe that supports the pump so as to be movable up and down.

According to water sand pump of the present invention, a sand excavation rod is drilled, as well as dispensing the sand-containing water to the suction tube while hoisting the turning flow of the pre-rotation chamber by the swirling flow nozzle, the drilling rod reservoir sand By excavating, the surrounding sand can be gradually broken down, so that it can descend naturally by the weight of the pump while preventing burial, and the sand accumulated in the sand collection pit can be pumped up. .

Then, a rod-shaped excavating rod that projects from the rotating shaft of the impeller vertically downward from the pre-swirl tank and excavates the sediment is rotated in the same direction at the same rotational speed as the impeller by the submersible motor, and the swirling flow of the swirling flow nozzle is generated. By extending so as to rotate in the direction opposite to the direction , the excavation rod is less likely to be worn, and it is possible to prevent the residue from being entangled with the excavation rod.

In addition , by providing a guide pipe that supports the pump so that it can be raised and lowered , the pump can be prevented from overturning and operated in a direction perpendicular to the pond.

  Hereinafter, embodiments of the submersible sand pump of the present invention will be described with reference to the drawings.

  FIG. 1 shows an embodiment of the submersible sand pump of the present invention.

  This submersible sand pump is a submersible sand pump in which a suction pipe 2 is disposed below the rotation shaft of the impeller 1, and a cylindrical pre-swirl tank 3 is disposed below the suction pipe 2. A swirl flow nozzle 4 for supplying pressure water in a tangential direction is provided, and a drilling rod 5 for excavating sand sediment is rotatably extended from the rotating shaft of the impeller 1 below the pre-swirl tank 3.

The impeller 1 is rotationally driven by a submersible motor 6 and sands water and sand sucked from the suction pipe 2 through the discharge pipe 9 to the ground.
A pre-revolving tank 3 having a diameter larger than that of the suction pipe 2 is coaxially installed below the suction pipe 2.

The pre-swirl tank 3 has a cylindrical shape with an upper wall 31, and the suction pipe 2 is connected so as to penetrate the upper wall 31.
Further, a swirl flow nozzle 4 is connected to the pre-swirl tank 3, and the swirl flow nozzle 4 supplies pressure water in a tangential direction of the pre-swirl tank 3 from a pump on the ground side (not shown). Then, a swirling flow is generated inside the pre-swirling tank 3.
In this case, the direction of the swirl flow by the swirl flow nozzle 4 and the rotation direction of the excavation rod 5 can be reversed.

The excavation rod 5 extends from the rotating shaft of the impeller 1 to the lower side of the pre-swivel tank 3 and is rotated in the same direction at the same rotational speed as the impeller 1 by the submersible motor 6.
Since the excavation rod 5 has a rod shape, the excavation rod 5 is less likely to be worn. Further, the excavation rod 5 protrudes a required length below the pre-swirl tank 3 so that the sand pool S can be excavated in a state where the pre-swirl tank 3 is landed. it can.
In this case, the sand collecting pit 7 in which the sand is accumulated is provided with a guide pipe 8 that supports the pump so that the excavation rod 5 is substantially vertical and the pump can be moved up and down.

Thus, the submersible sand pump of the present embodiment is a submersible sand pump in which the suction pipe 2 is disposed below the rotation shaft of the impeller 1, and the cylindrical pre-swirl tank 3 is disposed below the suction pipe 2. A swirl flow nozzle 4 for supplying pressure water to the pre-swirl tank 3 is attached to the pre-swirl tank 3, and an excavation rod 5 for excavating sand sediment is rotatably extended from the rotating shaft of the impeller 1 to the lower part of the pre-swirl tank 3. Therefore, as shown in FIG. 2A, the sand-containing water is quantitatively supplied to the suction pipe 2 while the sand excavated by the excavating rod 5 is rolled up by the swirling flow in the pre-swirling tank 3 by the swirling flow nozzle 4. At the same time, as shown in FIG. 2 (b), the excavation rod 5 excavates the sand pool S, so that the surrounding sand can be gradually broken down, and as shown in FIG. 2 (c), It will descend naturally by the weight of the pump while preventing The sand accumulated in the Atsumarisuna pit within 7 can be Agesuna.
Then, by reversing the direction of the swirl flow by the swirl flow nozzle 4 and the direction of rotation of the excavation rod 5, the excavation rod 5 is prevented from being entangled with the excavation rod 5, and the excavation rod 5 is made substantially vertical. Thus, by providing the guide pipe 8 that supports the pump so that it can be raised and lowered, the pump can be prevented from being overturned and operated in a direction perpendicular to the pond.
The submersible sand pump pumps sand in the sand collecting pit 7 by repeating the operations of FIGS. 2 (a) to 2 (c).

As mentioned above, although it explained based on the example about the submersible sand pump of the present invention, the present invention is not limited to the composition described in the above-mentioned example, the composition described in the example is suitably combined, etc. The configuration can be changed as appropriate without departing from the spirit of the invention.
For example, the submersible sand pump can be connected in-line with a booster pump installed on the ground.

  The submersible sand pump of the present invention has a characteristic that the sand content rate is controlled and sucked up at the same time, and has the property of preventing the incapability of sucking up due to burial, so it is suitable for the use of a submersible sand pump installed in a sand basin. In addition to being used, for example, it can be used for the purpose of pumping up sludge.

It is the front view which saw through a part which shows one Example of the underwater sand pump of this invention. It is process drawing which shows operation | movement of the same sand pump.

DESCRIPTION OF SYMBOLS 1 Impeller 2 Suction pipe 3 Pre-rotation tank 31 Upper wall 4 Swirling flow nozzle 5 Drilling rod 6 Submersible motor 7 Sand collection pit 8 Guide pipe 9 Discharge pipe S Sand pool

Claims (2)

In a submersible sand pump in which a suction pipe is provided below the rotation shaft of the impeller, a swirl flow nozzle is provided with a cylindrical pre-swirl tank below the suction pipe and supplying pressure water to the pre-swirl tank in a tangential direction as well as attached to, the axis of rotation of the impeller, the drilling rod of the rod-like drilling a sand projects downward vertical direction from the pre-rotation chamber, in the same direction at the impeller and the rotational speed by submersible motor and swirling flow nozzle A submersible sand pump characterized in that it extends so as to rotate in the direction opposite to the direction of the swirl flow by the . Water sand pump according to claim 1, characterized in that a guide pipe for vertically supporting the pump.

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