JP2547809Y2 - Pump device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump device for sucking and discharging objects to be sucked, such as sewage and filth, in which solids and mud are mixed, for example, accumulated water, bottom water, and sediment which are easy to suck in air. .

[0002]

2. Description of the Related Art Conventionally, a pump device for sucking and discharging sewage and filth used in a process of sucking and discharging spring water and accumulated water at a construction site or the like is disclosed, for example, in Japanese Patent Laid-Open No. 2-199295.

FIG. 4 shows a sectional view of this type of pump device. As shown in the figure, a suction port 102 and a discharge port 103 are provided in an upper portion of the outer casing 101. Further, the motor casing 10 is provided inside the outer casing 101.
4 is accommodated, and a motor 105 is accommodated in the motor casing 104.

The rotating shaft 106 of the motor 105 projects downward through the bottom of the motor casing 104, and an impeller 107 is attached to the lower end thereof, and a guide blade 108 is disposed on the outer peripheral side of the impeller 107. Have been. Further, in the outer casing 101, the suction port 10
One end of the suction pipe 109 is connected to 2, and the other end of the suction pipe 109 is arranged below the impeller 107 so as to face each other.

In this pump device, when a process of sucking and discharging sewage and filth (hereinafter simply referred to as "sewage") is performed, a predetermined amount of priming water is stored in the outer casing 101, and the motor 105 Drive. As a result, the impeller 107 rotates and its centrifugal force causes the impeller 1 to rotate.
The priming water in the periphery of 07 is pushed outward in the radial direction, that is, laterally, and the lower side of the impeller 107 is depressurized.

[0006] By the suction action by this reduced pressure, the hose 1
Sewage is sucked in from the tip of 10, and is sucked up to the periphery of the impeller 107 through the suction port 102 and the suction pipe 109. Further, the sewage is impeller 1 by the centrifugal force.
07 is pushed out to the side, passes between the guide vanes 108, and is pushed out into the outer casing 101. This operation is continuously repeated, and when the inside of the outer casing 101 is filled with the sewage, the sewage is discharged from the discharge port 103.

[0007]

However, this type of conventional pump device has a structure in which a plurality of guide vanes 108 are provided at a predetermined distance from the inner peripheral surface 101a of the side wall of the outer casing 101. A passage that is continuous in the circumferential direction is formed between the blade 108 and the outer casing 101.

Accordingly, by the action of the sewage that has passed through the guide blades 108 by the rotation of the impeller 107 and has been pushed into the outer casing 101, the circumferential rotation flow in the passage between the guide blades 108 and the outer casing 101. Then, the air sucked together with the sewage is moved in the circumferential direction along with the generated flow of the rotating flow, so that it is difficult for the air to float and is not guided smoothly to the water surface. In addition, since the air is not discharged to the outside smoothly, it is difficult to secure a sufficient degree of vacuum, and there is a problem that good suction performance cannot be exhibited.

In view of the above problems, an object of the present invention is to provide a pump device which improves suction performance by smoothly discharging sucked air.

[0010]

A first technical means for achieving the above object is that an inner casing is housed in an outer casing provided with a discharge port, and the inner casing is rotatably driven. The lower end of the shaft protrudes from the bottom of the inner casing to accommodate the driving means, and a horizontally rotating impeller is attached to the protruding lower end of the rotating shaft, and the inner peripheral surface of the outer periphery of the impeller and the side wall of the outer casing. wherein the plurality of guide vanes in the circumferential direction in the horizontal plane with a predetermined distance from
Suction provided at the bottom of the inner casing, one end opening of the suction pipe is arranged below the impeller, and is sucked from a suction port provided at the other end of the suction pipe by a suction action by rotation of the impeller. A pump device for discharging an object from a discharge port through a suction pipe and an outer casing;
The point is that only a part of the plurality of guide blades is extended to the inner peripheral surface of the outer casing.

The second technical means is that the inner casing is housed in an outer casing provided with a discharge port, and the lower end of a rotating shaft driven to rotate is protruded from the bottom of the inner casing in the inner casing. A means is accommodated, and a horizontally rotating impeller is attached to a lower end of the protruding rotation shaft . A circumferential direction in a horizontal plane is provided on the outer periphery of the impeller and at a predetermined interval from an inner peripheral surface of a side wall portion of the outer casing. A plurality of guide vanes are provided at the bottom of the inner casing, one end opening of the suction pipe is disposed opposite to below the impeller, and suction provided at the other end of the suction pipe by a suction action by rotation of the impeller. In a pump device for discharging an object to be sucked from a mouth through a suction pipe and an outer casing from a discharge port, only a part of the plurality of guide vanes is used.
Between the outer peripheral end of the outer casing and the inner peripheral surface of the outer casing.

[0012]

According to the first invention, one of the plurality of guide vanes is provided.
Since only the portion extends to the inner peripheral surface of the outer casing, a circumferential passage formed between each guide blade and the inner peripheral surface of the side wall portion of the outer casing is blocked by the extended guide blade. Structure.

Therefore, the rotational flow generated by the action of the suctioned object pushed between the guide blades and into the outer casing by the rotation of the impeller is blocked at the cutoff position, and the flow is suppressed. The circumferential movement of the air moving in the circumferential direction along with the flow is also suppressed, and the air sucked in together with the suctioned object quickly floats up, is smoothly guided on the water surface, and can be discharged to the outside. Here, a sufficient degree of vacuum can be secured, and good suction performance can be exhibited.

According to a second aspect of the present invention, a plurality of guide vanes are provided.
Partition ribs that are continuous with each other are provided between the outer peripheral end portion of only a part of the outer peripheral portion and the inner peripheral surface of the outer casing. The circumferential passage formed therebetween is interrupted by the partition ribs, and the rotational flow is suppressed by the partition ribs as described above.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the first invention will be described below with reference to the drawings. In FIGS.
An outer casing 2 and an inner casing 3 housed in the outer casing 2 at appropriate intervals in a circumferential direction,
The outer casing 2 is composed of an upper casing body 4 connected to each other in a liquid-tight manner and an outer peripheral wall 5 of an intermediate bearing case 5.
and a lower casing 6. A plurality of legs 7 are provided on the outer peripheral portion on the lower surface side of the lower casing 6 so as to be spaced apart in the circumferential direction so as to protrude downward.

The inner casing 3 is composed of an upper motor casing 9 connected to each other in a liquid-tight manner and an intermediate bearing case 5.
And a lower portion of a seal bracket 10, and a motor casing 9 houses a motor 11 as a drive unit. The bearing case 5
The outer peripheral wall portion 5a and the bearing wall portion 5b are connected to each other by a plurality of connecting pieces 5c arranged at predetermined intervals in the circumferential direction. The rotating shaft 12 of the motor 11 is rotatably supported on the motor casing 9 and the bearing wall portion 5b via a bearing 13 so as to be rotatable around a vertical axis. The lower end of the rotating shaft 12 has a bearing wall portion 5b and It protrudes downward through the seal bracket 10. The lubricating oil chamber 14 composed of the bearing wall 5b and the seal bracket 10 is appropriately filled with lubricating oil.

An impeller 15 is attached to the bottom of the inner casing 3, that is, the lower end of the rotating shaft 12 protruding downward from the seal bracket 10. The impeller 15 is composed of an upper disk-shaped substrate 15a and a lower surface of the substrate 15a. And a plurality of rotating blades 15b projecting from the side in the circumferential direction and each formed in a spiral shape.

The impeller 15 is arranged above the bottom wall 6a of the outer casing 2 with a slight gap from the bottom of the outer casing 2, that is, the bottom wall 6a of the lower casing 6.

A ring-shaped substrate 16 is fastened to the seal bracket 10 at a position on the outer peripheral side of the impeller 15, and a bolt 17 is fastened to the lower surface of the substrate 16 at the outer periphery of the impeller 15. A plurality of guide blades 18 are provided in the circumferential direction at a predetermined interval from the inner peripheral surface 6c of the side wall portion 6b of the lower casing 6. As shown in FIG. 2, each guide blade 18 is configured so that the spiral direction is opposite to the spiral direction of the impeller 15. Also, as shown in FIG.
The outer peripheral edge 6 is formed so as to project radially outward from the outer peripheral position of the plurality of guide blades 18.

Further, an outer peripheral portion of a pair of radially spaced guide vanes 18 of the plurality of guide vanes 18 has an extended portion 18 extending to the inner peripheral surface 6 c of the lower casing 6.
a is provided.

An elbow-shaped discharge port 20 communicating with the inside of the outer casing 2 is provided on the upper surface side of the upper wall portion 4a of the casing body 4, and a suction pipe 21 is provided on the outer surface side of the lower casing 6. It is provided integrally. That is, the suction pipe 2
Reference numeral 1 denotes a substantially extending shape extending radially one side from a central portion on the lower surface side of the bottom wall portion 6a of the lower casing 6, and further extending upward along the outer surface of the side wall portion 6b of the lower casing 6. It is configured as an L-shaped tube. An opening 22 for communicating the suction pipe 21 and the outer casing 2 with each other is formed in the center of the lower casing 6 corresponding to the center below the impeller 15, and constitutes one end opening 22 of the suction pipe 21. I have. A suction port 24 made of an elbow is connected to the other end opening 23 of the suction pipe 21.

In FIG. 1, reference numeral 26 denotes a carrying handle.

The embodiment of the first invention is constructed as described above. When the sewage treatment is performed, the priming water is accommodated in the outer casing 2 to a position corresponding to the water surface position H and the discharge port is provided. Hose 3 at 20 and suction port 24
1 and 32 are connected, and the motor 11 is driven.

The rotation of the rotating shaft 12 is driven by the driving of the motor 11, and the impeller 15 is rotated in the direction of the arrow P shown in FIG. 2. The centrifugal force causes the priming water around the impeller 15 to move outward in the radial direction. That is, the lower side of the impeller 15 is depressurized by being pushed to the side. By the suction action by the reduced pressure, the wastewater is sucked into the hose 32 from the tip of the hose 32, and is sucked to the periphery of the impeller 15 through the suction port 24 and the suction pipe 21 in order. Further, the sewage is pushed to the side of the impeller 15 by the centrifugal force, passes between the plurality of guide blades 18, and is pushed to the inner and outer peripheral portions of the outer casing 2. Then, the sewage extruded along the guide blades 18 flows along a circumferential passage formed between each guide blade 18 and the inner peripheral surface 6c of the lower casing 6 (in the direction of arrow Q in FIG. 2). Cause. In addition, the air sucked together with the sewage is also pushed out to the inner and outer peripheral portions of the outer casing 2 and moves along with the flow of the rotational flow.

At this time, since a pair of radially spaced guide vanes 18 are provided with an extended portion 18a at the outer peripheral end thereof,
The circumferential passage is interrupted by each of the extending portions 18a, and the generated rotational flow is blocked at the position of each of the extending portions 18a and its flow is suppressed. The circumferential movement of the air moving in the circumferential direction is also suppressed, and the air sucked in together with the sewage quickly floats up, is smoothly guided on the water surface, and is discharged to the outside. When the above operation is repeated and the discharge passage 33 in the outer casing 2 is filled with sewage, the hose 3
Sewage is discharged through 1. However, the rotating flow is water
It rotates flat and the air rises vertically,
Need not be completely stopped, but rather quickly drain the sewage
It is desirable to maintain a certain amount of rotating flow in order to discharge
No. Therefore, the extending portion 18a is attached to the pair of guide blades 18.
Only provided.

As described above, according to the above embodiment, since the air sucked together with the sewage can be smoothly guided to the surface of the water and discharged to the outside by suppressing the rotational flow, a sufficient degree of vacuum can be secured. Here, the suction performance can be improved.
Further, the extending portion 18a is provided only on the pair of guide blades 18.
The impeller 15 rotates horizontally.
The suction performance of the pump device is ensured while maintaining a high degree of vacuum.
And the extension portion 1 is attached to all the guide blades 18.
8a compared to the case where 8a is provided.
Can be.

FIG. 3 is a cross-sectional view of a main part of the second embodiment of the present invention. The overall structure is the same as that of the first embodiment. The components having the same configuration are denoted by the same reference numerals, and the description is omitted.

That is, as shown in FIG. 3, the outer peripheral ends of a pair of radially spaced guide vanes 18 of the plurality of guide vanes 18 and the inner peripheral surface 6c of the lower casing 6 are continuous with each other. In order to achieve this, a partition rib 35 is integrally provided from the lower casing 6 side. In addition, the partition rib 35 is the guide blade 1
8 has substantially the same height.

Here, as in the first invention, the circumferential passage formed between each guide blade 18 and the inner peripheral surface 6c of the side wall 6b of the lower casing 6 is structured to be blocked by the partition ribs 35. It works the same as 1) and ensures a sufficient degree of vacuum
And suction performance can be improved. Also, as in the first invention, rotation
Since the flow rotates horizontally and the air levitation occurs vertically,
It is not necessary to stop the rotating flow completely, but rather waste water quickly
In order to discharge to the outside, it is better to maintain a certain amount of rotational flow
desirable. For this reason, the extension portion 18a is provided with a pair of guide blades 1.
8 only, so that the impeller 15
High degree of vacuum in flat rotating type pump device
While improving the suction performance.
The manufacturing cost of the device is lower than when it is provided on the guide vane 18.
Can be suppressed.

[0030] In the Examples and Examples of the second invention of the first invention, while indicating the extending portion 18a and the partition rib 35 are provided a pair spaced apart in the radial direction structure, which
Are only required to be in one part.
The structure may be provided as many as possible.

[0031]

As described above, according to the pump device of the first invention, at least one of the guide blades extends to the inner peripheral surface of the outer casing. A circumferential passage formed between the outer casing and the peripheral surface is blocked by the extended guide vanes. The air thus generated can be smoothly floated and discharged, so that a high degree of vacuum can be secured and the suction performance can be improved. Also, the impeller rotates horizontally.
Part of multiple guide vanes in a rotating pump device
Only extends to the inner peripheral surface of the outer casing,
Since the rotating flow is not completely stopped, a high degree of vacuum is secured.
While improving suction performance, all guide vanes
The manufacturing cost of the equipment can be reduced compared to the case where
Can be.

Further, according to the pump device of the second invention, since at least one of the guide blades and the inner peripheral surface of the outer casing are provided with partition ribs which are continuous with each other, the same as in the first invention. becomes a structure in which the circumferential direction of the passage formed is cut off by the partition ribs between the side wall inner peripheral surface of each guide vane and the outer casing, first devised same high vacuum
Degree can be secured, and the suction performance can be improved. In addition, the first consideration
As in the plan, the pump device in which the impeller rotates horizontally
Outer peripheral edge and outer casing of only some of the guide vanes
Partition ribs that are continuous with each other
Because it is provided, do you not stop the rotating flow completely?
Therefore, the suction performance can be improved while ensuring a high degree of vacuum.
In addition, compared to the case where it is provided between all guide vanes,
The manufacturing cost of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the first invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view of a main part showing an embodiment of the second invention.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump apparatus 2 Outer casing 3 Inner casing 6 Lower casing 6b Side wall part 6c Inner peripheral surface 11 Motor 12 Rotary shaft 15 Impeller 18 Guide blade 18a Extension 20 Discharge port 21 Suction pipe 22 Opening 23 Opening 24 Suction port 35 Partition ribs

Claims (2)

(57) [Scope of request for utility model registration] An inner casing is housed in an outer casing provided with a discharge port, and a driving means is housed in the inner casing such that a lower end of a rotating shaft driven to rotate projects from a bottom of the inner casing. Horizontal to the lower end of the rotating shaft
The rotating impeller is attached to the outer casing, and water is provided at a predetermined interval from the outer peripheral surface of the impeller and from the inner peripheral surface of the side wall of the outer casing.
Said Keshi plurality of guide vanes in the circumferential direction in a plane
The suction object is provided at the bottom of the suction tube, the one end opening of the suction pipe is disposed below the impeller, and is suctioned from the suction port provided at the other end of the suction pipe by the suction action of the rotation of the impeller. A pump device that discharges air from an outlet through a suction pipe and an outer casing, wherein only a part of the plurality of guide vanes extends to the inner peripheral surface of the outer casing. 2. An inner casing is accommodated in an outer casing provided with a discharge port, and a driving means is accommodated in the inner casing such that a lower end of a rotating shaft driven to rotate projects from a bottom of the inner casing. Horizontal to the lower end of the rotating shaft
The rotating impeller is attached to the outer casing, and water is provided at a predetermined interval from the outer peripheral surface of the impeller and from the inner peripheral surface of the side wall of the outer casing.
Said Keshi plurality of guide vanes in the circumferential direction in a plane
The suction object is provided at the bottom of the suction tube, the one end opening of the suction pipe is disposed below the impeller, and is suctioned from the suction port provided at the other end of the suction pipe by the suction action of the rotation of the impeller. A pump device for discharging air from the discharge port through the suction pipe and the outer casing, wherein the outer peripheral end portion of only a part of the plurality of guide vanes and the inner peripheral surface of the outer casing are continuous with each other. A pump device comprising a partition rib.