JP3692339B2 - Column type pump and pump gate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a column type pump provided with a submersible pump inside a column fixedly installed in a structure.
[0002]
The present invention relates to a pump gate in which a column type pump is provided in a gate door that partitions an upstream side and a downstream side in a drainage station or the like.
[0003]
[Prior art]
For example, a drainage station is provided at the confluence of the main river and the tributary to prevent backflow from the main river to the tributary due to increased water. At the drainage station, when the main river is flooded, the gate door on the tributary side is closed, and water from the tributary is discharged to the main river side by an underwater pump device. The submersible pump device is installed in the vicinity of the gate door by forming an installation part by civil engineering work, or is installed on the gate door itself.
[0004]
As a submersible pump apparatus installed in a drainage station, a column type pump is known in which a column is fixed to a structure such as a civil engineering structure or a gate door, and a submersible pump is installed inside the column. The column type pump is, for example, a submersible pump that is suspended and inserted into a cylindrical column from the upper opening of the column, and the submersible pump is fixedly supported in the column by its own weight, and a lid is fixed to the upper opening of the column (for example, Bolts and nuts are fixed to prevent pumping water leakage.
[0005]
[Problems to be solved by the invention]
The column-type pump can carry out the submersible pump by removing the lid and lifting the submersible pump when the seal member is exchanged or the motor is regularly checked. For this reason, it is possible to perform maintenance relatively easily. In recent years, reduction of work man-hours has been considered also in the field of maintenance work for column-type pumps, and further reduction of work man-hours is desired at present.
[0006]
The present invention has been made in view of the above situation, and an object of the present invention is to provide a column type pump capable of further reducing maintenance by minimizing manual work.
[0007]
Another object of the present invention is to provide a pump gate provided with a column type pump that can reduce manual work as much as possible and further improve maintainability. .
[0008]
[Means for Solving the Problems]
In order to achieve the above object, a column type pump of the present invention comprises:
A submersible pump is installed inside the standing column,
In a column type pump in which water is pumped in a flow path between a submersible pump case and a column,
A lid for sealing the upper opening of the column;
Connect the submersible pump to the inside of the lid,
Lid by placing the water pump to the column is characterized in that it is fitted and sealing the column by the weight of the submersible pump.
[0009]
And a lid and a submersible pump are connected with a hollow connection member,
A wiring member is arranged on the connecting member.
[0010]
In addition, the column is formed in a cylindrical shape and the lid is formed in a disk shape,
A disc-shaped lid is fitted to the inner periphery of the upper end opening of the column.
[0011]
In addition, the column is formed in a cylindrical shape and the lid is formed by providing a cylindrical portion around the disk,
A cylindrical portion of the lid is fitted to the outer periphery of the upper end opening of the column.
[0012]
In order to achieve the above object, a pump gate of the present invention comprises a gate door that partitions an upstream side and a downstream side, and the column type pump according to any one of claims 1 to 4 is provided in the gate door. It is characterized by that.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a cross section of a column type pump according to the first embodiment of the present invention, FIG. 2 shows a cross section of the column type pump according to the second embodiment of the present invention, and FIG. FIG. 4 shows an explanation of the conveyance status of the column type pump.
[0014]
A column type pump according to a first embodiment will be described with reference to FIG.
[0015]
A cylindrical column 1 is erected on a structure (not shown) (for example, a gate door of a pump gate), and a discharge pipe 2 that discharges pumped water is connected to a cylindrical portion at the top of the column 1. A submersible pump 3 is installed and fixed inside the column 1.
[0016]
A rotor main shaft 6 extending in the vertical direction in the figure is rotatably supported on the motor cover 5 of the submersible pump 3 via a bearing 7, and a rotor core 8 is fixed to the rotor 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 having guide vanes 10 is connected to the outer peripheral portion of the lower part of the motor cover 5, and a suction casing 12 as a suction port is connected to the diffuser 11. A lower portion of the rotor main shaft 6 is disposed so as to extend to the position of the suction casing 12, and blade blades 13 are attached to the rotor main shaft 6 located inside the suction casing 12. The blade blades 13 are arranged in the flow path between the suction casing 12 and the motor cover 5.
[0018]
A flange portion 21 is provided on the inner periphery of the lower opening of the column 1, and a fitting portion 22 is formed on the outer periphery of the diffuser 11. When the submersible pump 3 is suspended and placed in the column 1, the fitting portion 22 on the outer peripheral portion of the diffuser 11 is fitted to the flange portion 21, and the submersible pump 3 is fixed inside the column 1 by its own weight. It becomes a state.
[0019]
Between the fitting part 22 and the flange part 21, it seals with an O-ring etc., and it is set to the shape which a fitting force becomes strong in the direction where the self-weight of the submersible pump 3 acts.
[0020]
When power is supplied by the cable 15 as the wiring member, the rotor main shaft 6 rotates, and the blade blade 13 sucks water into the suction casing 12 and the diffuser 11, and the sucked water flows outside the motor cover 5. The water is pumped in column 1.
[0021]
A disc-shaped lid 23 is fitted to the inner periphery of the upper opening of the column 1, and the inside of the column 1 is sealed by the lid 23. That is, a large-diameter portion 1a (inner diameter is increased) is provided in the upper opening portion of the column 1, and a lid 23 is fitted to the inner periphery of the large-diameter portion 1a via an O-ring 23a. The large-diameter portion 1a is formed so that the inner diameter gradually decreases, and is configured such that when a lower force is applied to the lid 23, the fitting force between the upper opening of the column 1 and the lid 23 is increased.
[0022]
A lower end of a hollow connecting stay 25 as a connecting member is fixed to an upper portion of the motor cover 5 of the submersible pump 3, and an upper end of the connecting stay 25 is fixed to the lid 23. A hanging metal fitting 26 is provided outside the lid 23. A cable 15 for supplying power is arranged in the hollow portion of the connecting stay 25 and guided to the outside.
[0023]
The submersible pump 3 connected by the connecting stay 25 together with the lid 23 via the suspension fitting 26 is suspended and dropped into the column 1. The fitting portion 22 on the outer peripheral portion of the diffuser 11 is fitted to the flange portion 21, and the submersible pump 3 is fixed inside the column 1 by its own weight. At the same time, the lid 23 is fitted to the inner periphery of the large-diameter portion 1a, and the column 1 is sealed through the O-ring 23a to complete the water stop.
[0024]
In the above-described column type pump, the motor is driven by energization through the cable 15, the rotor main shaft 6 rotates, and water is sucked from the suction casing 12 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 column 1 and discharged from the discharge pipe 2.
[0025]
The lid 23 is only fitted and sealed to the column 1 by its own weight, but the shape of the large-diameter portion 1a is set so that the fitting force exceeds the hydraulic thrust force due to the discharge pressure. Therefore, the lid 23 sealed by the own weight of the submersible pump 3 does not float during operation.
[0026]
That is, the submersible pump 3 connected with the connecting stay 25 together with the lid 23 is dropped into the column 1 and the submersible pump 3 is installed, so that the lid 23 can be fixed to the column 1 at the same time.
[0027]
When exchanging the seal member or the like for maintenance, the submersible pump 3 is lifted by lifting the submerged pump 3 connected by the connecting stay 25 together with the lid 23 via the hanging metal fitting 26, so that the submersible pump 3 can be carried out without performing a work such as unlocking. be able to.
[0028]
For this reason, it is not necessary to manually fix and release the lid 23 at the time of maintenance, and the workability can be improved by greatly reducing the number of work steps.
[0029]
Accordingly, it is possible to provide a column type pump that can further reduce maintenance by minimizing the manual work.
[0030]
A second embodiment of the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same member as the member shown in FIG.
[0031]
A cylindrical column 31 is erected on a structure (not shown) (for example, a gate door of a pump gate), and a discharge pipe 2 that discharges pumped water is connected to a cylindrical portion at the top of the column 31. A submersible pump 3 is installed and fixed inside the column 31.
[0032]
A rotor main shaft 6 extending in the vertical direction in the figure is rotatably supported on the motor cover 5 of the submersible pump 3 via a bearing 7, and a rotor core 8 is fixed to the rotor 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 having guide vanes 10 is connected to the outer peripheral portion of the lower part of the motor cover 5, and a suction casing 12 as a suction port is connected to the diffuser 11. A lower portion of the rotor main shaft 6 is disposed so as to extend to the position of the suction casing 12, and blade blades 13 are attached to the rotor main shaft 6 located inside the suction casing 12. The blade blades 13 are arranged in the flow path between the suction casing 12 and the motor cover 5.
[0034]
A flange portion 21 is provided on the inner periphery of the lower opening of the column 31, and a fitting portion 22 is formed on the outer periphery of the diffuser 11. When the submersible pump 3 is suspended and placed in the column 1, the fitting portion 22 on the outer peripheral portion of the diffuser 11 is fitted to the flange portion 21, and the submersible pump 3 is fixed inside the column 31 by its own weight. It becomes a state.
[0035]
Between the fitting part 22 and the flange part 21, it seals with an O-ring etc., and it is set to the shape which a fitting force becomes strong in the direction where the self-weight of the submersible pump 3 acts.
[0036]
When power is supplied by the cable 15 as the wiring member, the rotor main shaft 6 rotates, and the blade blade 13 sucks water into the suction casing 12 and the diffuser 11, and the sucked water flows outside the motor cover 5. The water is pumped in column 1.
[0037]
A lid 35 provided with a cylindrical portion 34 around the disk 33 is fitted to the outer periphery of the upper opening of the column 31, and the inside of the column 31 is sealed by the lid 35. That is, the inner peripheral side of the cylindrical portion 34 of the lid 35 is fitted to the outer periphery of the upper opening of the column 31 via the O-ring 31a. A tapered portion 34a whose diameter gradually increases toward the lower side is formed on the lower end edge side of the tubular portion 34, and the tubular portion 34 can be easily fitted to the outer periphery of the upper opening portion of the column 31 by the tapered portion 34a. ing.
[0038]
Further, the shapes of the upper openings of the lid 35 and the column 31 are configured such that when a downward force is applied to the lid 35, the fitting force between the upper opening of the column 1 and the lid 23 is increased.
[0039]
A lower end of a hollow connecting stay 25 as a connecting member is fixed to an upper portion of the motor cover 5 of the submersible pump 3, and an upper end of the connecting stay 25 is fixed to a lid 35. A hanging metal fitting 26 is provided on the outside of the lid 35. A cable 15 for supplying power is arranged in the hollow portion of the connecting stay 25 and guided to the outside.
[0040]
The submersible pump 3 connected by the connecting stay 25 together with the lid 35 via the suspension fitting 26 is suspended and dropped into the column 31. The fitting part 22 of the outer peripheral part of the diffuser 11 is fitted to the flange part 21, and the submersible pump 3 is fixed inside the column 31 by its own weight. At the same time, the inner periphery of the cylindrical portion 34 of the lid 35 is fitted to the outer periphery of the upper opening of the column 31, and the column 31 is sealed via the O-ring 31a to complete the water stop.
[0041]
In the above-described column type pump, the motor is driven by energization through the cable 15, the rotor main shaft 6 rotates, and water is sucked from the suction casing 12 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 column 1 and discharged from the discharge pipe 2.
[0042]
The lid 35 is only fitted and sealed to the column 31 by the weight of the submersible pump 3, but the lid 35 and the upper opening of the column 31 so that the fitting force exceeds the hydraulic thrust force due to the discharge pressure. Therefore, the lid 35 sealed by the weight of the submersible pump 3 does not rise during operation.
[0043]
That is, the submersible pump 3 connected with the coupling stay 25 together with the lid 35 is dropped into the column 31 and the submersible pump 3 is installed, so that the lid 35 can be fixed to the column 31 at the same time.
[0044]
When exchanging the seal member or the like for maintenance, the submersible pump 3 is lifted by lifting the submerged pump 3 connected with the lid 35 and the connecting stay 25 via the suspension fitting 26, so that the submersible pump 3 is carried out without performing the work of releasing the fixing. be able to.
[0045]
For this reason, it is not necessary to manually fix and unlock the lid 35 at the time of maintenance, and it is possible to greatly reduce the work man-hours and improve the maintainability.
[0046]
Accordingly, it is possible to provide a column type pump that can further reduce maintenance by minimizing the manual work.
[0047]
The lid 35 is pivotally supported with respect to the connecting stay 25, and after the lid 35 is fitted to the outer periphery of the upper opening of the column 31, the lid 35 and the column 31 are rotated by rotating the lid 35. It can also be configured to lock. Thereby, the lid | cover 35 is reliably fixed with respect to the hydraulic thrust force by discharge pressure.
[0048]
A pump gate including the column type pump described above will be described with reference to FIGS.
[0049]
As shown in FIG. 3, a gate-type structure 54 is constructed between the upstream side 52 and the downstream side 53 of the drainage station 51, and an open / close door 55 is provided on the gate-type structure 54 so as to be movable up and down. . The open / close door 55 is lifted and lowered by the lifting mechanism 56 and is lowered to partition the upstream side 52 and the downstream side 53.
[0050]
As shown in FIGS. 3 and 4, the opening / closing door 55 is provided with two column-type pumps 41 (column-type pumps shown in FIGS. 1 and 2). That is, the column 42 (column 1 in FIG. 1, column 31 in FIG. 2) of the column type pump 41 is fixed to the open / close door 55, and the lower part of the column (suction casing 12: see FIGS. 1 and 2) A suction part 57 that opens to the upstream side 52 is connected.
[0051]
Then, when the submersible pump 3 is dropped into the column, the lid 43 (the lid 23 in FIG. 1 and the lid 35 in FIG. 2) is sealed, and the column pump 41 is installed.
[0052]
When the submersible pump 3 is inspected or replaced, the submersible pump 3 is lifted together with the lid 43 by the crane 57 provided in the portal structure 54, and the crane 57 is moved and placed on the pedestal 58. Since the lid 43 is sealed by its own weight, the submersible pump 3 can be moved simply by lifting the lid 43 without performing the unlocking operation.
[0053]
For this reason, the submersible pump 3 can be inspected and replaced even when the open / close door 55 is closed, and a pump gate having excellent maintainability can be obtained.
[0054]
【The invention's effect】
The column type pump of the present invention is a column type pump in which a submersible pump is disposed inside a standing column, and water is pumped in a flow path between a case of the submersible pump and the column. part comprising a lid for sealing the concatenates submersible pump the inside of the lid, since the lid by placing the water pump to the column is fitted and sealing the column by the weight of the submersible pump, submersible pump with lid The submersible pump can be carried out without lifting or unfixing work by lifting the lid, eliminating the need to manually fix and unlock the lid during maintenance, greatly reducing work steps and improving maintainability. Can be made.
[0055]
As a result, it is possible to provide a column type pump that can minimize maintenance work and further improve maintainability.
[0056]
The pump gate of the present invention includes a gate door that partitions the upstream side and the downstream side, and the column type pump according to any one of claims 1 to 4 is provided in the gate door. A pump gate having a column type pump that can be further improved in maintainability by minimizing as much as possible can be obtained, and a pump gate having extremely excellent maintainability can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a column type pump according to a first embodiment of the present invention.
FIG. 2 is a sectional view of a column type pump according to a second embodiment of the present invention.
FIG. 3 is a schematic configuration diagram of a pump gate.
FIG. 4 is an explanation of the conveyance status of a column type pump.
[Explanation of symbols]
1,31 Column 2 Release pipe 3 Submersible pump 5 Motor cover 6 Rotor main shaft 7 Bearing 8 Rotor core 9 Stator 10 Guide vane 11 Diffuser 12 Suction casing 13 Blade vane 15 Cable 21 Flange portion 22 Fitting portion 25 Connecting stay 26 Suspension bracket 33 Disk 34 Cylinder 35 Lid 41 Column-type pump 42 Column 43 Lid 51 Drainage station 52 Upstream side 53 Downstream side 54 Portal structure 55 Opening / closing door 56 Lifting mechanism 57 Crane 58 Mounting base

Claims (5)

In a column type pump in which a submersible pump is arranged inside a standing column and water is pumped up in a flow path between the case of the submersible pump and the column,
A lid for sealing the upper opening of the column;
Connect the submersible pump to the inside of the lid,
Column pump, characterized in that the lid by placing the water pump to the column is fitted and sealing the column by the weight of the submersible pump. In claim 1,
The lid and the submersible pump are connected by a hollow connecting member,
A column type pump characterized in that a wiring member is arranged on the connecting member. In claim 1 or claim 2,
The column is formed in a cylindrical shape and the lid is formed in a disk shape,
A column type pump characterized in that a disc-shaped lid is fitted to the inner periphery of the upper end opening of the column. In claim 1 or claim 2,
A column type pump characterized in that a column is formed in a cylindrical shape, a lid is formed by providing a cylindrical portion around a disk, and a cylindrical portion of the lid is fitted to the outer periphery of the upper end opening of the column.   5. A pump gate comprising a gate door for partitioning an upstream side and a downstream side, wherein the column type pump according to any one of claims 1 to 4 is provided on the gate door.

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