JP3749401B2 - Vortex pump gate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump gate having a pump that opens and closes a water channel and drains water on one side of a closed water channel to the other side, and more particularly to a vortex pump gate.
[0002]
[Prior art]
Conventionally, for example, in a place where a tributary flows into a river (main stream), a gate for opening and closing the tributary is installed on the tributary side. When the river increases due to heavy rain or the like, the river is prevented from flowing back to the tributary by closing the gate. On the other hand, the water that flows from the upstream of the tributary when the gate is closed is forcibly drained to the river side (downstream side) by the pump.
[0003]
Among these types of gates, in order to save space, there is a pump gate having a structure in which the drain pump is attached to the gate itself.
[0004]
However, the conventional pump gate has a structure in which water flows between impellers of a rotating pump regardless of whether a vertical pump or a horizontal pump is used as a pump. The car gets stuck and breaks down. For this reason, a large-scale dust removal facility (automatic dust remover or the like) must be installed on the upstream side of the pump gate, resulting in high construction costs and operation costs.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and an object of the present invention is to provide a pump gate that can drain even a large garbage and can simplify or omit dust removal equipment.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention incorporates a drain pump into the gate itself that opens and closes the water channel, and operates the pump in a state where the water channel is closed by the gate. In the pump gate configured to drain water, the pump is a vortex pump including an impeller that rotates to give a vortex to the fluid and a driving unit that rotationally drives the impeller, and the vortex pump Is installed on the pump gate so that the rotation surface of the impeller is substantially parallel to the surface of the pump gate by being installed so that the rotation shaft of the impeller is a horizontal axis. .
The vortex pump gate includes a casing that forms a pump flow path, the impeller is stored in an impeller storage portion provided at a lower portion of the casing, and the driving unit is attached to the outside of the impeller storage portion. It is characterized by.
The drive means is installed at a position in contact with river water on the downstream side of the pump gate.
The drive means is installed below the discharge port at the end of the pump flow path and at a position where drainage discharged from the discharge port is applied.
The position of the suction port is lowered by inclining the shaft mounting angle of the rotating shaft of the impeller so that the suction port side of the impeller faces downward from the horizontal.
The material of the impeller of the vortex pump is an elastic material.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a vortex pump gate 100 according to an embodiment of the present invention, and FIG. 2 is a perspective view of the vortex pump gate 100 as viewed from the opposite side. As shown in both figures, the vortex pump gate 100 is configured by connecting and fixing two unit-type vortex pumps 10 and 10 of the same standard in parallel and attaching frame members 40 and 40 to both sides thereof. A vortex pump V is used as a drainage pump attached to each of the unit-type vortex pumps 10 and 10 respectively. Each component will be described below.
[0008]
FIG. 3 is a view showing one unit type vortex pump 10, FIG. 3 (a) is a schematic side sectional view, and FIG. 3 (b) is an AA schematic sectional view of FIG. 3 (a). FIG. 4 is a perspective view showing a state in which the upstream surface of the frame body 35 is cut away in one unit type vortex pump 10 in the state shown in FIG.
[0009]
As shown in FIGS. 3, 4, 1, and 2, this unit type vortex pump 10 has a pump flow path (suction flow path 29 and a suction flow path 29) inside a box-shaped frame 35 that is open on the downstream side. A casing 15 forming a discharge flow path 31) is attached, a bottomed impeller housing portion 17 protruding at the lower portion of the casing 15 is provided, an impeller 19 is housed in the impeller housing portion 17, and an impeller housing portion is provided. The speed reducer 21 is attached to the outside of the impeller 19 so as to be connected to the impeller 19, the submersible electric motor (driving means) 23 is attached on the speed reducer 21, and the portion of the frame 35 facing the impeller 19 is sucked The vortex pump V is configured by providing the port 14 and providing the vortex space G between the suction port 14 and the impeller 19. A backflow prevention valve (flap valve) 27 is attached to the discharge port 25 at the end of the discharge channel 31.
[0010]
Here, the impeller 19 is installed so that the rotating shaft 20 thereof is a horizontal axis (horizontal), so that the rotating surface of the impeller 19 is relative to the surface of the frame body 35 (that is, the surface of the vortex pump gate 100). Are almost parallel. Since the diameter of the impeller 19 is large in the vortex pump V, the thickness of the frame body 35 (that is, the thickness of the vortex pump gate 100) becomes considerably thick when the vortex pump V is installed so that the rotating shaft 20 of the impeller 19 is vertical (vertical). As a result, the weight is increased, the pump gate equipment is increased in size, and the construction cost of the pump gate is increased. Therefore, in this embodiment, the impeller 19 is installed as described above, thereby reducing the thickness of the entire frame 35 (that is, the entire vortex pump gate 100), reducing its weight, and reducing the size of the pump gate equipment. The construction cost has also decreased.
[0011]
Further, the submersible electric motor (driving means) 23 in this embodiment is configured so as to protrude from the downstream surface of the frame body 35 so as to be in contact with the downstream river water, and at the same time, the reverse flow. The prevention valve 27 is opened and the drainage discharged from the discharge port 25 is placed, that is, below the discharge port 25.
[0012]
Then, the vortex pump gate 100 is lowered into the water channel 1 by the vertical drive means (not shown) provided above the lifting members 41, 41 shown in FIG. 1 to close the water channel 1, and the water channel 1 flows backward from the downstream side. Shut off water. At this time, the backflow prevention valve 27 remains closed. On the other hand, in order to drain the water flowing from the upstream side to the downstream side, when the impeller 19 is rotated by driving the submersible motor 23 shown in FIG. 3, a vortex is generated in the vortex space G in front of the impeller 19 and the centrifugal force is generated. The upstream water pumped by the force and sucked from the suction port 14 is drained downstream from the discharge port 25 through the suction channel 29 and the discharge channel 31 by opening the backflow prevention valve 27.
[0013]
Here, since the vortex pump V having the vortex space G is used as a drainage pump in the present invention, even if a large dust is sucked from the suction port 14 together with water, the dust does not pass between the impellers, Since centrifugal force is applied in the vortex space G, it is transported as it is to the discharge passage 31 and drained, so that even large dust can be drained without clogging the pump. Therefore, it is not necessary to install a large dust removal equipment (automatic dust remover, etc.) that has been required to be installed upstream of the vortex pump gate 100, and the dust removal equipment can be simplified or omitted. Cost can be reduced.
[0014]
By the way, if dust removal equipment is simplified or omitted from the above, there is a high possibility that dust will be discharged by the vortex pump gate 100, and there is a high possibility that dust will collide with the impeller 19. Therefore, the material of the impeller 19 is made of an elastic material such as soft rubber or synthetic resin in addition to the conventional castings or steel plates, and dust is temporarily clogged in the impeller 19 and the pump is rapidly restrained. In such a case, the impact or galling on the power transmission unit such as a speed reducer may be reduced. In some cases, only the blade surface of the impeller 19 may be made of an elastic material.
[0015]
The submersible electric motor 23 is in contact with the water on the downstream side, so that it is cooled by this, and is also cooled by the drainage discharged from the discharge port 25, so that the cooling can be performed effectively.
[0016]
In the above embodiment, the pump gate is configured by connecting and fixing a plurality of (two) unit-type vortex pumps 10 and 10, so that depending on the width of the pump gate and the amount of drainage required depending on the water channel, Not only can one or more unit-type vortex pumps 10 of the same standard be easily connected, but the unit-type vortex pump 10 to be manufactured can be one type or a small amount of drainage with the same shape and structure. , It is easy to design and manufacture because only different types of drainage heads need to be produced.
[0017]
However, the present invention is not limited to the unit type. As shown in FIG. 5, the vortex pump V is attached to a desired position of one frame 35-2 constituting the vortex pump gate 100-2. Also good.
[0018]
Further, like the vortex pump gate 100-3 shown in FIG. 6, the shaft attachment angle of the rotating shaft 20 of the impeller 19 may be set so that the suction port 14 side of the impeller 19 faces downward from the horizontal. If comprised in this way, the position of the suction inlet 14 can be lowered | hung rather than what is shown in FIG. 1, and the minimum water level which can be pump-operated can be made low.
[0019]
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims. For example, the number of vortex pumps to be attached may be one or three or more. In addition to the electric motor, the driving means for driving the pump may be any other driving means such as a hydraulic motor. The speed reducer may be attached when necessary, and the transmission system may be any means such as a gear system, a belt system, or a chain system.
[0020]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects.
(1) Since a vortex pump is used as a pump for draining the pump gate, even large dust can be drained, dust removal equipment can be simplified or omitted, and the entire equipment can be reduced in size and maintenance can be facilitated. In addition, construction costs and operating costs can be reduced.
[0021]
(2) The diameter of the vortex pump impeller is large because it is installed on the pump gate so that the rotation axis of the impeller is a horizontal axis and the rotation surface of the impeller is substantially parallel to the surface of the pump gate. Even a vortex pump having an impeller can reduce the thickness of the entire pump gate, reduce its weight, reduce the size of the pump gate equipment, and reduce the construction cost.
[0022]
(3) Since the driving means for rotationally driving the impeller of the vortex pump is configured to come into contact with the river water on the downstream side of the pump gate, the cooling can be effectively performed.
[0023]
(4) If the position of the suction port is lowered by tilting the shaft mounting angle of the rotating shaft of the impeller so that the suction port side of the impeller is downward from the horizontal, the minimum water level at which the pump can operate is lowered. can do.
[0024]
(5) When the material of the impeller is made of an elastic material, even when the pump is rapidly restrained by dust or the like, it is possible to reduce the impact and galling on the power transmission unit such as a reduction gear.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a vortex pump gate 100 according to an embodiment of the present invention.
FIG. 2 is a perspective view of the vortex pump gate 100 as viewed from the opposite side.
3A and 3B are diagrams showing one unit-type vortex pump 10. FIG. 3A is a schematic side sectional view, and FIG. 3B is a schematic AA sectional view of FIG. 3A.
4 is a perspective view showing a state in which a surface on the upstream side of the frame body 35 of the unit type vortex pump 10 is cut away. FIG.
FIG. 5 is a perspective view showing a vortex pump gate 100-2 according to another embodiment.
FIG. 6 is a cross-sectional view showing a vortex pump gate 100-3 according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Water channel 100 Vortex pump gate 10 Unit type vortex pump V Vortex pump 14 Suction port 15 Casing 17 Impeller storage part 19 Impeller 20 Rotating shaft 21 Orthogonal axis reduction gear 23 Underwater electric motor (drive means)
25 Discharge port 27 Backflow prevention valve (Flap valve)
35 Frame 100-2 Vortex Pump Gate 100-3 Vortex Pump Gate

Claims (6)

In a pump gate configured to drain water on one side of a closed water channel by incorporating a drain pump into the gate itself for opening and closing the water channel and operating the pump with the gate closed by the gate ,
The pump is a vortex pump including an impeller that gives a vortex to the fluid by rotating, and a driving unit that rotationally drives the impeller.
The vortex pump is installed on the pump gate so that the rotation surface of the impeller is substantially parallel to the surface of the pump gate by being installed so that the rotation shaft of the impeller is a horizontal axis. Vortex pump gate characterized by The vortex pump gate includes a casing that forms a pump flow path, the impeller is stored in an impeller storage portion provided at a lower portion of the casing, and the driving unit is attached to the outside of the impeller storage portion. The vortex pump gate according to claim 1. 3. The vortex pump gate according to claim 1 , wherein the driving unit is configured to contact river water downstream of the pump gate. The said drive means is the downward direction of the discharge opening of the said pump flow path end, Comprising: The waste_water | drain discharged | emitted from this discharge opening is installed in the position which requires this, The Claim 1 or 2 or 3 characterized by the above-mentioned. Vortex pump gate. The shaft mounting angle of the rotating shaft of the impeller, one of claims 1 to 4, characterized in that lowered position of the suction port by tilting as inlet side of the impeller than the horizontal facing downward one of claims vortex pump gate. The vortex pump gate according to any one of claims 1 to 5 , wherein the material of the impeller of the vortex pump is an elastic material.

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