JP3686403B2 - Submersible pump device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a submersible pump device including a pump drive motor unit.
[0002]
[Prior art]
For example, at the confluence of the main river and the tributary, a drainage station is provided to prevent backflow from the main river to the tributary and to remove the internal water on the tributary side when there is a heavy rain. In the drainage station, when the main river is flooded, the tributary side gate is closed and water on the tributary side is released to the main river side by a pump facility that holds an underwater pump device.
[0003]
In addition, as a similar facility, there is known a drainage station for discharging water accumulated in farmland or the like from a water channel to a river.
[0004]
The submersible pump device installed at the drainage station is fixed to the ground floor by placing a manhole (column hatch), which is a pump attachment / detachment port, at the top, depending on the installation situation of the discharge side (discharge side) piping, etc. Column type with a submersible pump placed inside the column holding the part, or a structure where the stand member placed on the bottom of the water tank is fixed to the lower part of the pump suction casing, and the discharge pipe is connected from the flange part at the top of the pump casing The stationary type etc. which were used are used (for example, refer patent document 1).
[0005]
[Patent Document 1]
Japanese Patent No. 2903752 [0006]
In the case of the column type, the discharge side (discharge side) piping is often laid on the ground, but depending on the situation, it may be underground. A discharge pipe is taken out from an appropriate part of the column and connected to the pipe. In the case of a stationary type, a discharge side (discharge side) pipe is connected via a flange at the upper end of the pump casing. In the submersible pump device, a submersible pump unit (pump main body) is disposed in the water, and water is sucked from around the suction port of the submersible pump.
[0007]
[Problems to be solved by the invention]
In recent years, the location where the submersible pump device is installed has been subject to various restrictions on the location of the pump, the size of the intake section (water channel or water tank), the arrangement of the discharge pipe, etc. ing. For example, it is conceivable that the submersible pump facility is configured such that the size of the water absorption tank is small, the submersible pump is installed outside the water tank, and the submersible pump absorbs water from a water intake having an insufficient opening size. Or the case where a submersible pump is installed in a narrow water absorption tank is also considered. In such a case, the suction section shape of the conventional submersible pump has a large suction resistance, a sufficient suction flow rate cannot be obtained, and a pump vortex is generated, resulting in a significant reduction in pump efficiency.
[0008]
The present invention has been made in view of the above situation, and because of the limited water absorption tank dimensions and water absorption direction, the shape is devised so that the suction loss is reduced even in a place where a conventional submersible pump cannot be installed. It is an object of the present invention to provide a submersible pump device that can operate the pump without any problems by arranging the suction bend at the tip of the submersible pump suction section.
[0009]
[Means for Solving the Problems]
To achieve the above object, the submersible pump device of the present invention comprises:
A stand member fixed to the bottom of the aquarium,
An outer tube member (column) attached to the upper part of the stand member;
A submersible pump that is arranged inside the outer pipe member and can be attached and detached in the vertical direction;
A suction bend provided in the stand and having a suction part for opening water in the submersible pump is provided in one direction.
[0010]
The outer pipe member is a column whose discharge pipe opens in one lateral direction and communicates with a discharge part (pipe member such as a pipe) on the ground side or underground side by flange connection or the like. Is characterized in that a pump body (pump unit) can be easily attached and detached by disposing a column hatch and removing the column hatch.
[0011]
The submersible pump device of the present invention for achieving the above object is
A stand member disposed on the bottom of the aquarium;
A stand member is fixed under the water inlet at the lower end of the casing, and the casing is connected to a piping member (pipe, etc.) via a flange at the upper end portion;
The water suction part provided in the stand has a suction bend that opens in one direction and guides the taken water to the suction port of the submersible pump.
[0012]
In addition, the opening of the suction part of the suction bend has a rectangular shape, an elliptical shape, or a circular shape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a cross section of a submersible pump device according to an embodiment of the present invention, FIG. 2 shows a perspective view of a suction bend, and FIG. 3 shows a cross section of the suction bend.
[0014]
A submersible pump device 3 is installed between an irrigation canal 1 such as a recreation pond (or a tributary side waterway) and a discharge side discharge channel 2 (river or main river). The water in the irrigation channel 1 is discharged into the discharge channel 2 by the submersible pump device 3.
[0015]
The submersible pump device 3 will be described.
[0016]
As shown in FIG. 1, the submersible pump device 3 includes a submersible pump 10. A main shaft 6 as a rotating shaft extending in the vertical direction in the figure is rotatably supported on the motor cover 5 of the submersible pump 10 via a bearing 7, and a rotor core 8 is fixed to the main shaft 6. A stator 9 is fixed to the motor cover 5 around the rotor core 8, and a predetermined gap is maintained between the rotor core 8 and the stator 9.
[0017]
A diffuser 11 and a suction casing 12 as a suction port are connected to the outer peripheral portion of the lower portion of the motor cover 5. A lower portion of the main shaft 6 is arranged extending to the position of the suction casing 12, and a blade blade 13 is attached to the main shaft 6 located inside the suction casing 12. The blade blades 13 are arranged in a flow path formed by the suction casing 12 and the diffuser 11.
[0018]
A terminal block 14 is provided inside the upper portion of the motor cover 5, and power is supplied via a cable 15. By supplying power to the terminal block 14 from the cable 15, the main shaft 6 rotates, and water is sucked into the suction casing 12 by the blade blades 13, passes through the diffuser 11, and is pumped to the outside of the motor cover 5.
[0019]
The submersible pump 10 is disposed by its own weight inside a column 16 as an outer pipe member, and a discharge pipe 17 is provided on the upper side surface of the column 16. The water that has passed through the discharge pipe 17 is discharged into the discharge path 2. That is, the discharge pipe 17 communicates with the discharge part. A manhole, which is a pump attachment / detachment port, is provided at the top of the column 16, and a column hatch 36 is disposed in the manhole.
[0020]
A base 22 as a stand member is fixedly installed on a base portion 21 as a bottom surface of a water tank where the submersible pump 10 is installed, and a column 16 is fixedly installed on the base 22. The submersible pump 10 is installed in the column 16 by its own weight. By removing the column hatch 36, the submersible pump 10 can be pulled up from the manhole.
[0021]
The water channel 1 is provided with a water intake 24 at the lower portion of the wall 23, and the frame 22 is provided with a suction casing 12 as a suction port and a suction bend 25.
[0022]
As shown in FIGS. 1 and 2, the suction bend 25 has a circular shape in which the upper end surface portion 20 is connected to the suction casing 12, and the suction port 26, which is the suction portion on the water intake side (the water intake port 24 side), has a lateral direction ( It opens in the rectangular state toward the water intake 24 (one place) in the horizontal direction).
[0023]
Even if the water in the irrigation channel 1 is guided to the suction casing 12 which is the suction port of the submersible pump 10 by the suction bend 25 and the water intake port 24 is provided in the lower part of the wall 23 and the water intake direction is limited, that is, the submersible pump 10. Even in a place where a sufficient space for sucking water cannot be secured around the lower part of the water, it becomes possible to suck water in the irrigation channel 1.
[0024]
As a result, the overall height of the suction bend 25 can be minimized, that is, the installation height of the submersible pump device 3 can be lowered, and the water in the irrigation channel 1 can be sucked. By lowering the installation height of the submersible pump device 3, the pushing force at the time of sucking water works more and the sucking performance is improved, and the lowest water level that can be sucked can be lowered accordingly.
[0025]
As shown in FIG. 3, the suction bend 25 is formed with a curvature in which a flow path is formed in an arc shape from the upper end surface portion 20 toward the suction port 26, and the flow of water sucked from the suction port 26 is smoothed. Yes. Further, the upper side portion of the suction port 26 is a slant portion 26a bent upward with respect to the horizontal, and a structure in which water flow separation at the suction port 26 does not occur with respect to suction in the horizontal direction (horizontal direction). it can. Thereby, it becomes possible to suppress the pressure drop by peeling.
[0026]
In the submersible pump device 3 described above, the main shaft 6 is rotated by driving the motor by energization, and the water in the water channel 1 is sucked in from the suction bend 25 in the lateral direction by the rotation of the blade blades 13. The sucked water is pumped from the diffuser 11 through a flow path between the motor cover 5 and the column 16 and discharged from the discharge pipe 17 and a pipe (not shown) to the discharge path 2 side.
[0027]
For this reason, by providing the suction bend 25, water can be sucked by the suction bend 25 even in the limited lateral water intake 24. In addition, because of the column type structure, the sucked water can be discharged from the discharge pipe 17 of the column 16 regardless of whether the discharge side pipe is buried in the ground or the ground pipe. Therefore, it is possible to provide the submersible pump device 3 that can be installed regardless of the situation of the piping on the discharge side even in a limited water intake space and water intake direction.
[0028]
A second embodiment of the present invention will be described based on FIG.
[0029]
FIG. 4 shows a cross section of a submersible pump device according to a second embodiment of the present invention. The same members as those shown in FIGS. 1 to 3 are denoted by the same reference numerals.
[0030]
A submersible pump device 31 is installed between an irrigation channel 1 (or a tributary side channel) and a discharge side discharge channel 2 (river, main river, etc.) such as a pond. The water in the irrigation channel 1 is discharged into the discharge channel 2 by the submersible pump device 31.
[0031]
The submersible pump device 31 will be described.
[0032]
As shown in the figure, the submersible pump device 31 includes a submersible pump 10. A main shaft 6 as a rotating shaft extending in the vertical direction in the figure is rotatably supported on the motor cover 5 of the submersible pump 10 via a bearing 7, and a rotor core 8 is fixed to the main shaft 6. A stator 9 is fixed to the motor cover 5 around the rotor core 8, and a predetermined gap is maintained between the rotor core 8 and the stator 9.
[0033]
A diffuser 11 and a suction casing 12 as a suction port are connected to the outer peripheral portion of the lower portion of the motor cover 5. A lower portion of the main shaft 6 is arranged extending to the position of the suction casing 12, and a blade blade 13 is attached to the main shaft 6 located inside the suction casing 12. The blade blades 13 are arranged in a flow path formed by the suction casing 12 and the diffuser 11.
[0034]
A terminal block 14 is provided inside the upper portion of the motor cover 5, and power is supplied via a cable 15. By supplying power to the terminal block 14 from the cable 15, the main shaft 6 rotates, and water is sucked into the suction casing 12 by the blade blades 13, passes through the diffuser 11, and is pumped to the outside of the motor cover 5.
[0035]
The submersible pump 10 is disposed and fixed inside a casing 32 as an outer pipe member. That is, the upper part of the suction casing 12 is connected to the opening of the casing 32, and the submersible pump 10 is fixed inside the casing 32. A flange 33 is provided at the upper end opening (end) of the casing 32. A flange 35 of a discharge pipe 34 as a piping member is connected to the flange 33.
[0036]
A pedestal 22 as a stand member is disposed on the base portion 21 on which the submersible pump 10 is installed. The submersible pump 10 is fixed to the pedestal 22 together with the suction casing 12. By installing the submersible pump 10 together with the suction casing 12 on the gantry 22, the submersible pump 10 can be installed on the base portion 21.
[0037]
The water channel 1 is provided with a water intake 24 at the lower portion of the wall 23, and the frame 22 is provided with a suction casing 12 as a suction port and a suction bend 41.
[0038]
The suction bend 41 has a circular shape in which the upper end surface portion 43 is connected to the suction casing 12, and the suction port 42, which is a suction portion on the water intake side (the water intake port 24 side), faces the water intake port 24 (one place) in the lateral direction. Open in a rectangular state. The suction bend 41 has a suction port 42 located on the inner side (left side in the figure) of the water intake port 24.
[0039]
For this reason, the submersible pump 10 is pulled upward together with the casing 32 and the gantry 22.
[0040]
Even though the water in the irrigation channel 1 is guided by the suction bend 41 to the suction casing 12 which is the suction port of the submersible pump 10 and the water intake 24 is provided in the lower part of the wall 23 and the water intake direction is limited, that is, the submersible pump 10. Even in a place where a sufficient space for sucking water cannot be secured around the lower part of the water, it becomes possible to suck water in the irrigation channel 1.
[0041]
As a result, the overall height of the suction bend 25 can be minimized, that is, the installation height of the submersible pump device 3 can be lowered, and the water in the irrigation channel 1 can be sucked. By lowering the installation height of the submersible pump device 3, the pushing force at the time of sucking water works more and the sucking performance is improved, and the lowest water level that can be sucked can be lowered accordingly.
[0042]
The suction bend 41 is formed in a curvature in which a flow path is formed in a curved shape from the upper end surface portion 43 toward the suction port 42, and the flow of water sucked from the suction port 42 is smoothed. Further, the upper side portion of the suction port 42 is a slant portion 42a bent upward with respect to the horizontal, so that water flow separation at the suction port 42 does not occur with respect to suction in the horizontal direction (horizontal direction). it can. Thereby, it becomes possible to suppress the pressure drop by peeling.
[0043]
In the submersible pump device 31 described above, the main shaft 6 is rotated by driving the motor by energization, and the water in the water channel 1 is sucked from the suction bend 25 in the lateral direction by the rotation of the blade blades 13. The sucked water is pumped from the diffuser 11 through the flow path between the motor cover 5 and the casing 32 and discharged from the discharge pipe 34 joined by the flanges 33 and 35 to the discharge path 2 side.
[0044]
For this reason, by providing the suction bend 41, water can be sucked by the suction bend 41 even in the limited lateral water intake 24. And about the stationary submersible motor pump pulled up with piping at the time of maintenance, it can be set as the submersible pump apparatus 31 which can be installed even if it is the limited water intake space and the water intake direction.
[0045]
【The invention's effect】
The submersible pump device of the present invention is a stand member fixed to the bottom of the aquarium, an outer pipe member attached to the upper part of the stand member, a submersible pump arranged inside the outer pipe member and attachable / detachable in the vertical direction, Since the water suction part to the submersible pump provided in the stand is equipped with a suction bend that opens in one direction, it can be installed in the limited water intake direction regardless of the situation of the piping on the discharge side. It can be a pump device.
[0046]
The outer pipe member is a column whose discharge pipe opens in one direction in the horizontal direction and communicates with the discharge part on the ground side or underground side by flange connection or the like, and a column hatch is arranged at the upper part of the column. Therefore, the pump body can be easily attached and detached by removing the column hatch.
[0047]
The submersible pump device of the present invention is a submersible in which a stand member disposed on the bottom of a water tank and a stand member is fixed under a water inlet at the lower end of the casing, and the casing is connected to a piping member via a flange at the upper end. As it has a pump and a suction bend that is provided in the stand and the suction part of the water to the submersible pump opens in one direction and guides the taken water to the suction port of the submersible pump, it has a limited intake space and direction Even so, it is possible to provide a submersible pump device that can be installed regardless of the condition of the piping on the discharge side.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a submersible pump device according to a first embodiment of the present invention.
FIG. 2 is a perspective view of a suction bend.
FIG. 3 is a cross-sectional view of a suction bend.
FIG. 4 is a sectional view of a submersible pump device according to a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Waterway 2 Discharge path 3,31 Submersible pump apparatus 5 Motor cover 6 Main shaft 7 Bearing 8 Rotor core 9 Stator 10 Submersible pump 11 Diffuser 12 Suction casing 13 Blade blade 14 Terminal block 15 Cable 16 Column 17 Discharge pipe 20, 43 Upper end surface part 21 Foundation Section 22 Base 23 Wall 24 Intake port 25, 41 Suction bend 26, 42 Suction port 32 Casing 33, 35 Flange 34 Discharge piping 36 Column hatch

Claims (4)

A stand member fixed to the bottom of the aquarium,
An outer tube member attached to the top of the stand member;
A submersible pump that is arranged inside the outer pipe member and is attachable and detachable in the vertical direction;
The suction part provided on the stand member opens in one direction in the horizontal direction,
A submersible pump device comprising a suction bend for guiding the taken water to a suction port of a submersible pump. The submersible pump device according to claim 1,
The outer pipe member is a column whose discharge pipe opens in one direction in the horizontal direction and communicates with the discharge part on the ground side or the ground side by flange connection, etc. A submersible pump device, wherein the submersible pump main body can be easily attached and detached by removing the hatch. A stand member disposed on the bottom of the aquarium;
A stand member is fixed under the water inlet at the lower end of the casing, and the casing is connected to the piping member via a flange at the upper end portion;
A submersible pump device comprising a suction bend provided on a stand, wherein a suction portion of water into the submersible pump opens in one direction and guides the taken water to a suction port of the submersible pump. In the submersible pump device according to any one of claims 1 to 3,
A submersible pump device characterized in that an opening of a suction portion of the suction bend has a rectangular shape, an elliptical shape, or a circular shape.

Images