JP2002202082A - Pump and gate pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump of low cost and easy for maintenance and to provide a gate pump capable of easily installing on a conventional gate and easy for maintenance. SOLUTION: This pump or gate pump is comprised of a cylindrical rotor 2, an impellor 3 provided in the cylindrical rotor 2, a flange part 2a projected from an outer circumference wall part of the cylindrical rotor 3 on a concentric circle, a bevel gear 4 provided on the flange part 2a, a bevel pinion 6 meshed with the bevel gear 4, a rotational drive mechanism 8 connected to a shaft 7 of the bevel pinion 6, and a pump casing 9 covering an outer circumference wall part of the cylindrical rotor 2 and the bevel gear 4 and the bevel pinion 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump suitable for drainage and water supply and a gate pump mounted on a gate such as a floodgate for irrigation, water intake or drainage.

[0002]

2. Description of the Related Art Conventionally, pumps are classified into centrifugal pumps, mixed-flow pumps, axial-flow pumps, and the like according to their operating principles and structures. Usually, a diagonal flow pump or an axial flow pump is used as a gate pump mounted on an irrigation gate, an intake gate, or the like.
The mixed flow pump and the axial flow pump indicate the flow direction of the fluid discharged from the impeller with respect to the rotation axis direction of the motor.

A conventional example of an axial flow pump used as a gate pump will be described below with reference to FIG. The figure shows a longitudinal sectional view of an axial pump 26. In the figure, a motor stator 28 is fixed to a main shaft 27, and a motor rotor 29 is mounted on the outer periphery of the motor stator 28. Are fixed to the inner periphery of the motor frame 30 concentric with the main shaft 27. An impeller 31 is fixed to the outer peripheral surface of the motor frame 30, bearings 32 are provided at both ends of the motor frame 30, and
7 is rotatably fixed, and the pump casing 3
Covered with 3. Both ends of the main shaft 27 are fixed by shaft support portions. The power supply cable 34 is connected to the pump casing 3.
3 and passes through the main shaft 27 to be connected to the electrodes of the motor stator 29.

This axial flow pump 26 is, for example, shown in FIG.
Gate 3 formed in water channel 35 shown in (a), (b)
6 is provided at the gate 37. The river water (fluid) flows into the axial pump 26 as shown by the arrow in FIG. 8 and is discharged through the space between the pump casing 33 and the motor frame 39 by the lift force of the impeller.

[0005]

However, in the axial flow pump 26 shown in FIG. 7, the motor stator 28 and the motor rotor 29 are arranged in the pump casing 33, that is, so as to obstruct the flow path. It occupies a large area with respect to the opening cross-sectional area of the inlet diameter of the flow pump 26,
In addition to the drawback that the substantial flow path is narrowed, and because the motor stator 28 and the motor rotor 29 are submerged in water, they have the drawback that they are prone to breakdown, and are difficult to repair. However, there is a disadvantage that the maintenance cost is high.
From such a viewpoint, a lift pump capable of pulling up the pump section from the water by wire has been developed. However, the pump is used so that it is submerged in the water, and the motor part (stator and rotor) is submerged in the water although it is surrounded by the pump casing, and there is a drawback that the probability of failure is high, There is a drawback that maintenance costs are high.

The present invention has been made in view of the above-mentioned problems, and provides a pump which is inexpensive and easy to maintain and maintain. It is an object to provide a simple gate pump.

[0007]

SUMMARY OF THE INVENTION The present invention has achieved the above-mentioned object, and the present invention is directed to a cylindrical rotor, an impeller provided in the cylindrical rotor, and the cylindrical rotor. A flange portion protruding concentrically from the outer wall portion of the rotor, a bevel gear provided on the flange portion, a bevel pinion meshing with the bevel gear, a rotation drive mechanism connected to a shaft of the bevel pinion, and the cylindrical shape. A pump comprising a rotor casing, a pump casing that covers the bevel gear and the bevel pinion.

According to a second aspect of the present invention, at least one screw impeller provided with the impeller provided in the cylindrical rotor, at least one screw impeller provided with a guide shaft, or an axial flow gear is provided. 2. The method according to claim 1, wherein
4. The pump according to 1.

In the invention according to claim 3, the cylindrical rotor provided in the pump casing is rotatably supported by a bearing.

According to the first aspect of the invention, the impeller is fixed to the inner wall of the cylindrical rotor, and the bevel pinion meshes with a bevel gear provided on the outer peripheral portion of the cylindrical rotor, and the shaft of the bevel pinion is rotated by the rotation drive mechanism. , The cylindrical rotor rotates and the impeller rotates. The fluid is given lift energy by the impeller by the rotation of the impeller, is conveyed from the inlet of the pump to the inside of the cylindrical rotor which is a flow path, and is discharged from the discharge port. Further, as the impeller, at least one screw-type impeller, at least one screw-type impeller provided with a guide shaft, or an axial-flow impeller is used. The cylindrical rotor is rotatably provided in the pump casing by a bearing in the pump casing. This bearing is preferably a cross roller bearing capable of simultaneously receiving a radial load and a thrust load.

Further, the pump of the present invention has a hermetically sealed structure so that the pump casing and the cylindrical rotor are in contact with the sealing material so that liquid does not flow into the pump casing. The bevel gear is preferably annular, but may be combined with an arc.

According to a fourth aspect of the present invention, there is provided a gate pump mounted on a gate supported by a gate provided in a water channel so as to be openable and closable by a vertical movement, provided in a direction perpendicular to the vertical direction of the gate. A cylindrical rotor, an impeller fixed to the inner wall of the cylindrical rotor, a flange protruding concentrically from the outer wall of the cylindrical rotor, a bevel gear provided on the flange, and teeth on the bevel gear. A bevel pinion, a rotary drive mechanism connected to the shaft of the bevel pinion, a pump casing that covers the outer peripheral wall of the cylindrical rotor, the bevel gear and the bevel pinion, and a discharge side of the cylindrical rotor. And a flap valve for closing the flow in the cylindrical rotor by hydraulic pressure.

According to a fifth aspect of the present invention, at least one screw impeller provided with the impeller provided in the cylindrical rotor, at least one screw impeller provided with a guide shaft, or an axial flow impeller is provided. The gate pump according to claim 4, wherein the gate pump is a car.

The invention according to claim 6 is the gate pump according to claim 5, wherein the cylindrical rotor provided in the pump casing is rotatably supported by a bearing.

According to a fourth aspect of the present invention, the pump according to the first to third aspects of the present invention is used as a gate pump.
It is mounted at right angles and horizontally, and its structure is, as described in the pump, an impeller fixed to the inner wall of the cylindrical rotor, and a bevel mounted on a bevel gear provided on the outer peripheral portion of the cylindrical rotor. By rotating the shaft of the bevel pinion by means of a rotary drive mechanism, the pinion meshes with the pinion, thereby rotating the cylindrical rotor to rotate the impeller, giving energy to the fluid by the lift force of the impeller, and causing the fluid to flow into the gate. From the side to the discharge side. The discharge side of the cylindrical rotor is provided with a flap valve that closes with the water pressure of river water or the like, and the river water or the like is discharged through a gate pump by applying energy larger than the water pressure.

As the impeller, at least one screw-type impeller, at least one screw-type impeller provided with a guide shaft, or an axial-flow impeller is used. The cylindrical rotor is rotatably provided by a bearing in the pump casing. This bearing is preferably a cross roller bearing capable of simultaneously receiving a radial load and a thrust load. Further, the pump casing and the cylindrical rotor have a sealed structure so as to be in contact with a sealing material so that river water or the like does not flow into the pump casing, and the rotary drive mechanism is further disposed outside the pump casing. As a result, inflow of river water or the like into the rotary drive machine can be further prevented. The bevel gear is preferably annular, but may be a combination of arcs.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a pump and a gate pump according to the present invention will be described below with reference to the drawings. The gate pump of the present invention is a pump mounted on a gate of a gate such as a sluice gate for irrigation, water intake, or drainage, and is one application of the pump of the present invention. And the same structure as the pump of the present invention. 1 to 4 illustrate a gate pump as an example of the pump.

FIG. 1 shows an embodiment of the pump of the present invention. FIG. 1A is a sectional view, and FIG. 1B is a partial sectional view along a direction perpendicular to the axial direction. . In FIG. 1, a pump 1 includes a cylindrical rotor 2 and a guide shaft 12 inserted at a position of the center of the shaft of the cylindrical rotor 2.
A single screw-shaped (spiral) impeller 3 fixed to the annular rear lid 9 c and fitted on the guide shaft 12 and fixed to the inner peripheral wall of the cylindrical rotor 2;
Flange portion 2 protruding from the outer wall portion and provided on a concentric circle
a, a bevel gear (bevel gear) 4 fixed to the inflow side of the flange portion 2a with screws 5, bevel pinions 6, 6 'meshing with the bevel gear 4, and shafts 7, 7' of the bevel pinions 6, 6 '. Drive mechanism 8, such as a motor connected to the
8 'and a pump casing 9 which covers the cylindrical rotor 2, the bevel gear 4, and the bevel pinions 6, 6'.

The pump casing 9 includes a main casing 9a.
And an annular front lid 9b provided at the front end thereof, and an annular rear lid 9c provided at the rear end of the main casing 9a. The annular front lid 9b and the annular rear lid 9c are fixed to the front end and the rear end of the main casing 9a by bolts 16, respectively. The pump casing 9 is provided so as to seal the outer peripheral portion of the cylindrical rotor 2. A cross roller bearing 10 is provided at the front end and the rear end of the cylindrical rotor 2. The outer ring of the cross roller bearing 10 is provided on the inner peripheral wall of the pump casing 9, and the inner ring of the cross roller bearing 10 is provided on the outer periphery of the cylindrical rotor 2. Fixed to the wall. An annular groove is formed in each of the annular front lid 9a and the annular rear lid 9b, and the sealant 11 is fitted into the annular groove. The front end and the rear end of the cylindrical rotor 2 are in contact with the sealing material 11 to prevent the fluid from flowing into the pump casing 9. The pump casing 9 has a sealed structure that covers the outer periphery of the cylindrical rotor 2.

The axes 7, 7 'of the bevel pinions 6, 6'
The shafts 7, 7 'extend on a line orthogonal to the center line direction of the cylindrical rotor 2 and outwardly with respect to the center line of the cylindrical rotor 2, and the respective shafts 7, 7' are provided with bearings 15, 15 '. It is rotatably fixed and connected to the rotation shafts of the rotation drive mechanisms 8, 8 '. The rotation driving mechanisms 8, 8 'are provided with bolts 17, 1
At 7 ', they are fixed to the pump casing 9, respectively.
Two pairs of the rotation drive mechanisms 8 are provided concentrically with the center line of the cylindrical rotor 2 so as to face each other. The rotation shafts of the rotation drive mechanisms 8, 8 'protrude toward the center of the shaft, and are connected to the shafts 7, 7' of the bevel pinions 6, 6 'by a key or a spline. The bevel pinions 6, 6 'mesh with the bevel gear 4, respectively, and the bevel gear 4 rotates in conjunction with the rotation of the bevel pinions 6, 6'.

In this embodiment, a pair of rotary drive mechanisms 8 are provided. For example, one is provided for a small pump and one for a large pump according to the diameter of the cylindrical rotor 2. Thus, three or more rotation drive mechanisms 8 may be used. If three rotation drive mechanisms 8 are used, the circumference of the cylindrical rotor 2 is concentric so that the center axes of the respective rotation axes intersect with the center line of the cylindrical rotor 2 at equal circumferential angles. Placed in When the number of the rotation drive mechanisms 8 is an even number, the rotation drive mechanisms 8 may be arranged so that the right and left sides are balanced so as to further face each other. The rotation drive mechanism 8 can use hydraulic pressure and air by using not only an electric motor (motor) but also a hydraulic motor or a pneumatic motor. Furthermore, the rotation drive mechanism 8 can be a rotation mechanism using water pressure, steam, fluid, or the like by using a turbine-shaped motor as the mechanism.

On the other hand, in the embodiment shown in FIG. 1, a water pipe 13 is provided on the annular rear lid 9b of the pump, and a flap plate 14 closed by water pressure is provided on the water pipe 13. In some cases, the flap plate 14 is not required as the pump, and the shape of the discharge portion of the pump has various forms depending on the application to be used. Similarly, in the gate pump, the shape of the discharge portion has various forms.

Next, the operation of the embodiment of FIG. 1 will be described. By driving the rotary drive mechanisms 8, 8 ', the bevel pinions 6, 6' rotate to rotate the bevel pinions 6, 6 '.
The bevel gear 4 meshing with 6 'rotates, and the cylindrical rotor 2 rotates.
Rotates. The impeller 3 provided on the cylindrical rotor 2
Since the fluid rotates in the fluid and the lift acting on the blades works on the fluid, the energy of the fluid increases, and a flow in the direction indicated by the arrow is generated.

That is, in the pump according to the present embodiment, since the fluid is conveyed in the cylindrical rotor 2, the fluid is immersed in the rotary drive mechanisms 8, 8 'provided outside the pump casing 9. No failures are likely to occur. what if,
Even if the rotary drive mechanisms 8, 8 'fail, the rotary drive mechanisms 8, 8' can be replaced from the outside while the pump is installed. It is easy to replace the rotary drive mechanism 8 in which the pump casing 9 is not broken. Therefore, when the pump of the present embodiment is used as a gate pump and the rotary drive mechanism 8 is an electric motor, the motor is not always submerged, so that the probability of occurrence of a failure is low, and the maintenance and management thereof is easy. Therefore, the effect is extremely large.
On the other hand, if the rotary drive mechanism 8 is a hydraulic motor or a pneumatic motor, the probability of occurrence of a failure is low even when the motor is constantly submerged.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. The pumps of the embodiments of FIGS. 2 to 4 have different shapes of the impeller, but the other shapes are the same as those of the embodiment of FIG. Of course, it is most preferable to use the pump of FIGS. 2 to 4 as a gate pump, but it can also be used as a water pump.
No flap valve is required.

First, the embodiment shown in FIG.
And a guide shaft 12 to which screw-type (spiral) impellers 3a and 3b are fixed. In the pump of the embodiment shown in FIG. 3, the cylindrical rotor 2 is provided with a single screw (spiral) impeller 3 c. The pump of the embodiment shown in FIG.
d is inserted and fixed to the cylindrical rotor with a bottle 18. The guide shaft 12 is fixed to the annular front lid 9b and the annular rear lid 9c. Of course, it is divided into a front cylindrical rotor 2a and a rear cylindrical rotor 2b, and an axial flow impeller (propeller type) 3d fixed to the guide shaft 12 is provided between the front cylindrical rotor 2a and the rear cylindrical rotor 2b. Front cylindrical rotor 2
a and the rear cylindrical rotor 2b may be fixed with bolts 18. As described in the above embodiments, the pumps of these embodiments rotate the cylindrical rotor 2 by rotating the bevel gear 4 meshing with the bevel pinion 6 by the rotation drive mechanism, and The fluid is transported by rotating the car.

Next, an embodiment in which the pump of the present invention is used as a gate pump will be described with reference to FIGS. 5A is a cross-sectional view of a drain gate, FIG. 5B is a cross-sectional view along the line AA, and FIG. 6A is a side cross-sectional view of a gate pump mounting portion. FIG. 6B is a front view thereof.

In FIG. 5, the gate pump 1 is a pump provided with a flap valve in the above embodiment, and is mounted on a gate 23 which can be moved up and down of a drain gate 19 provided in a water channel 21. The drain gate 19 is provided with a screen 20 for river water or the like.
A sluice post 22 is provided in a water channel 21 flowing through the sluice, and a rail 22a is provided on the sluice post 22. A gate 23 is supported between the sluice posts 22 so as to be able to move up and down. The gate pump 1 is built in the gate 23 horizontally so that its flow path is perpendicular to the direction in which the gate 23 moves up and down. The rotary drives 8, 8 'of the gate pump 1 are
3 so as to be horizontal in the width direction. A restricting member is provided on the front surface of the fluid suction port of the gate pump 1 as necessary in order to remove floating substances such as driftwood.

The gate 23 is provided with rollers 23a at both ends.
Is provided. A spindle 24 is connected to the gate 23, and an upper end thereof is incorporated in an opening / closing device 25.
By operating the opening / closing device 25, the spindle 24 moves up and down, and in conjunction therewith, the roller 23a provided on the gate 23 moves up and down while rolling on the rail 22a. The gate 23 of the drain gate 19 can be opened and closed by operating the opening and closing device 25.

FIG. 6A is a sectional view of a main part of the drain gate, and FIG. 6B is a front view of the gate. In the figure, a gate 23 incorporates the gate pump 1 of the above embodiment. The gate pump 1 is built in the gate 23, and the annular front cover 9 b of the gate pump 1 is fixed to the front plate of the gate 23. When the flap plate 14 provided on the annular rear lid 9c of the gate pump 1 is pressed by the water pressure indicated by the arrow, the flow path of the gate pump 1 is closed. By driving the gate pump 1, the impeller 3
Rotates, and river water is sucked in from the fluid inlet,
The flap plate 14 provided on the discharge side by being conveyed in the cylindrical rotor 2 is pushed open and flows into the drainage channel side.

The gate pump of the present invention may be any one of the embodiments shown in FIGS.
The use form is not limited to the embodiments described with reference to FIGS.

[0032]

As described above, according to the pump of the present invention, the outer peripheral portion of the cylindrical rotor has a sealed structure covered with the pump casing, and the inner peripheral wall portion of the cylindrical rotor of the pump is immersed in the fluid. Since the pump is only exposed and the rotary drive mechanism of the pump is not exposed to the fluid, the probability of failure of the rotary drive mechanism is low, and the number of failures is small, so that maintenance and management should be suppressed. There are advantages that can be.
This effect is the same even when river water or the like is used as a gate pump used for water supply or branching.

Further, according to the pump of the present invention, since a rotary drive mechanism such as a motor is not disposed in the flow path of the pump, the cross-sectional area of the opening through which the fluid passes does not decrease, and the efficiency of transporting the fluid is high. There are advantages. Further, when the pump of the present invention is installed at the gate of a narrow drainage gate, the drainage channel can be secured by one or two pumps. Alternatively, the gate pump can be replaced, which is extremely effective.

According to the gate pump of the present invention, when the gate pump is installed on the gate, the rotary drive mechanism such as a motor is arranged in the horizontal direction and in the width direction of the gate. There is an advantage that the gate can be easily moved up and down because no unnecessary load is applied. Further, since the rotary drive mechanism is provided in a direction orthogonal to the flow path, the width of the gate pump in the axial flow direction is reduced. Therefore, there is an advantage that even a small gate of an existing small drainage gate can be mounted.

[Brief description of the drawings]

1A and 1B show one embodiment of a pump and a gate pump according to the present invention, wherein FIG. 1A is a cross-sectional view thereof, and FIG. 1B is a partial cross-sectional view along a direction perpendicular to an axial direction.

FIG. 2 is a sectional view showing another embodiment of the pump and the gate pump according to the present invention.

FIG. 3 is a sectional view showing another embodiment of the pump and the gate pump according to the present invention.

FIG. 4 is a sectional view showing another embodiment of the pump and the gate pump according to the present invention.

5A and 5B show an embodiment in which the gate pump according to the present invention is mounted, wherein FIG. 5A is a cross-sectional view of the embodiment in which the gate pump is mounted, and FIG. 5B is along the line AA in which the gate pump is mounted on the gate. FIG.

FIG. 6 shows a gate equipped with a gate pump according to the present invention, wherein (a) is a sectional view in which the gate pump is attached to the gate;
(B) is a principal part front view in which the gate pump was mounted on the gate.

FIG. 7 is a sectional view of a conventional axial pump.

FIG. 8 shows a gate equipped with a conventional gate pump,
(A) is sectional drawing of a gate, (b) is a front view of a gate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump (gate pump) 2 Cylindrical rotor 2a Flange part 3,3a, 3b, 3c Impeller 3d Axial flow impeller 4 Bevel gear (bevel gear) 5,16-18 bolt 6,6 'Bevel pinion 7,7' shaft 8, 8 'rotation drive mechanism 9 pump casing 9a main casing 9b annular front lid 9c annular rear lid 10 cross roller bearing 11 seal material 12 guide shaft 13 water pipe 14 flap valve 15, 15' shaft 19 gate 20 screen 21 water passage 22 water Gate 23 Gate 24 Spindle 25 Lifting device

Claims (6)

[Claims] A cylindrical rotor; an impeller provided in the cylindrical rotor; a flange protruding concentrically from an outer peripheral wall of the cylindrical rotor; and a bevel gear provided on the flange. A bevel pinion that meshes with the bevel gear, a rotary drive mechanism connected to a shaft of the bevel pinion, and a pump casing that covers the outer peripheral wall of the cylindrical rotor, the bevel gear, and the bevel pinion. And pump. 2. An impeller provided in the cylindrical rotor is at least one screw impeller, at least one screw impeller provided with a guide shaft, or an axial impeller. The pump according to claim 1, wherein: 3. The pump according to claim 2, wherein the cylindrical rotor provided in the pump casing is rotatably supported by a bearing. 4. A gate pump mounted on a gate supported by a gate provided in a water channel so as to be openable and closable by a vertical movement, comprising: a cylindrical rotor provided in a direction perpendicular to a vertical direction of the gate; An impeller provided in the cylindrical rotor; a flange portion protruding concentrically from the outer peripheral wall of the cylindrical rotor; a bevel gear provided on the flange portion; a bevel pinion meshing with the bevel gear; A rotary drive mechanism connected to a shaft of a bevel pinion; a pump casing covering an outer peripheral wall of the cylindrical rotor, the bevel gear and the bevel pinion; and a cylindrical rotor provided on a discharge side of the cylindrical rotor. A gate pump, comprising: a flap valve that closes an internal flow path with water pressure. 5. An impeller provided in said cylindrical rotor is at least one screw impeller, at least one screw impeller provided with a guide shaft, or an axial impeller. The gate pump according to claim 4, wherein: 6. The gate pump according to claim 5, wherein the cylindrical rotor provided in the pump casing is rotatably supported by a bearing.