JP3901947B2 - Unit pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a unit pump suitable for use when transferring or draining rainwater or sewage.
[0002]
[Prior art]
Conventionally, pump equipment using a submersible motor pump is known as pump equipment for transferring or draining rainwater and sewage. FIG. 6 is a view showing this type of conventional pump equipment. In the pump facility shown in the figure, a drainage pump 85 is incorporated in the casing 81 of the plate-like base plate 83 so that water is sucked from a water intake 87 provided at the lower portion of the plate-like base plate 83 and drained from the flap valve 89. It is configured.
[0003]
However, the above conventional example has the following problems.
(1) The water level at which the vortex generated on the water surface is not sucked into the intake port 87, that is, the lowest suction water level could not be lowered further.
[0004]
(2) In operation when the water level is higher than the intake port 87 as shown in FIG. 6, it is rare to suck in floating matter floating on the water surface, but when the water level is lowered as shown in FIG. There is a risk that the floating object 90 such as a plastic container or a piece of wood floating on the water surface is easily sucked and the impeller 86 of the pump 85 or the casing 81 is clogged. For this reason, when there is such a danger, a large dust removal facility must be installed on the upstream side of the pump facility, resulting in high construction cost and operation cost.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and its purpose is to further reduce the minimum suction water level so that more effective drainage can be performed, and at the same time, it is difficult to suck in suspended matter. The object is to provide a unit pump that can be omitted.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention attaches a pump, a submersible motor, and a drive transmission device that transmits the power of the submersible motor to the plate-like base plate, and sucks it from the water intake of the pump by driving the pump. In the unit pump having a structure for draining the liquid from the discharge port, the pump is constituted by a pump casing attached to one surface of the plate-like base plate and an impeller accommodated in a lower part of the pump casing, and the intake port is The submersible motor is mounted on an upper portion inside the pump casing, and the pump and the submersible motor are attached to the plate-shaped base plate with the central axis of the pump impeller and the submersible motor. The motor shaft of the motor is parallel to each other and the plate base plate By attaching a Kamaboko type floating substance suction prevention cover to the intake port, the opening on the suction side of the floating substance suction prevention cover is directed downward, and The position is positioned below the central axis of the impeller of the pump installed substantially horizontally with respect to the water surface, and the surface of the opening is installed so as to be substantially horizontal with respect to the water surface. .
[0008]
In the present invention, a screen is provided around the suction side opening of the floating matter suction prevention cover so as to protrude in a conical shape or a rod shape so as to protrude downward at predetermined intervals so as to hook the floating matter. Features.
[0009]
Further, the present invention is characterized in that the pump is constituted by a non-blocking vortex pump, a non-clog pump, or a screw spiral pump.
[0010]
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 schematic configuration diagram of pump equipment using a unit pump 100 according to an embodiment of the present invention. FIGS. 2A and 2B are perspective views of the unit pump 100 shown in FIG. 1 as viewed from different surfaces. FIG. 3 is also a diagram showing the unit pump 100. FIG. 3A is a front view, FIG. 3B is a cross-sectional view taken along line BB of FIG. 1A, and FIG. ) Is a cross-sectional view taken along the line C-B of FIG. 4B, and FIG.
[0011]
As shown in these drawings, the unit pump 100 is configured by attaching a pump P, a submersible motor M, and a drive transmission device T to a plate-like base plate 10, and further attaching a floating substance suction prevention cover 30 to the water intake 6. Has been. Each component will be described below.
[0012]
First, a pump casing 8 that allows pump discharge water to pass therethrough is attached to one surface of the base plate 10, and an impeller 4 is housed in a lower portion inside the pump casing 8 to constitute a pump P. On the other hand, the submersible motor M is attached to the upper part inside the pump casing 8 so that the electric motor portion of the submersible motor M is located inside the pump casing 8.
[0013]
Here, the pump shaft 3 of the impeller 4 is rotatably supported by the base plate 10 and protrudes to the opposite side of the base plate 10, and a pulley 43 is attached to the tip portion thereof. On the other hand, the submersible motor M also projects its motor shaft 2 to the opposite side of the base plate 10 and has a pulley 93 attached to its tip. That is, the pump shaft 3 and the motor shaft 2 are installed so as to be parallel to each other and perpendicular to the base plate 10. The drive transmission device T is configured by winding the belt 11 between the pulleys 43 and 93. This drive transmission device T is sealed by a casing 15. The base plate 10 is provided with a pump discharge port 1 that communicates with the inside of the pump casing 8.
[0014]
The impeller 4 is housed in an impeller housing portion 81 provided in the pump casing 8, and a water intake 6 is provided in a portion facing the impeller 4 of the pump casing 8, and a spiral is formed between the water intake 6 and the impeller 4. By providing the chamber (vortex space) 5, this pump P is configured as a vortex pump.
[0015]
A floating substance suction prevention cover 30 is attached to the water intake 6. The floating substance suction prevention cover 30 is formed in a substantially scalloped shape, whereby the suction side opening 31 of the floating substance suction prevention cover 30 is directed downward and the surface of the opening 31 is substantially horizontal with respect to the water surface. Thus, the position of the opening 31 is positioned below the center axis L (see FIG. 3B) of the impeller 4 of the pump P.
[0016]
The unit pump 100 is installed in the water tank S so that the base plate 10 is perpendicular to the bottom surface of the water tank S as shown in FIG. A discharge pipe 25 is connected to the discharge port 1 (see FIG. 2) of the unit pump 100, and a backflow prevention valve 27 is attached to the tip thereof. Reference numeral 7 denotes a motor mounting hole cover.
[0017]
In this embodiment, the pump shaft 3 and the motor shaft 2 are installed so as to be parallel to each other and perpendicular to the base plate 10, and the pump shaft 3 and the motor shaft 2 are connected by a drive transmission device T. Since it comprised, the thickness reduction of the unit pump 100 can be achieved.
[0018]
When the submersible motor M is driven, the impeller 4 is rotated via the drive transmission device T, a vortex is generated in the spiral chamber 5 in front of the impeller 4, and the water is pumped up by the centrifugal force. The water in the water tank S sucked from the water intake port 6 flows through the pump casing 8, passes through the discharge pipe 25 from the discharge port 1, pushes the backflow prevention valve 27, and is drained. At this time, the submersible motor M is directly cooled by the discharged water. Further, the backflow prevention valve 27 prevents backflow of the drained water.
[0019]
In the present invention, since the floating substance suction prevention cover 30 is attached to the water intake 6, water is sucked from the opening 31 on the lower surface side thereof, so that the water surface such as a plastic container or a piece of wood floating on the water surface. Inhalation of the floating substance 50 is less likely to occur. Therefore, it is not necessary to install a large dust removal facility on the upstream side of the unit pump 100.
[0020]
If the floating substance suction prevention cover 30 is not attached, when the water surface of the water tank S descends to the vicinity of the upper part of the water intake 6, a suction vortex to the water intake 6 is generated, and the water intake 6 is swirled. At the same time, since air is sucked in and the drainage function is remarkably lowered, it is necessary to stop the driving of the pump when the water level reaches the water level where the suction vortex is not generated as the lowest water level. However, if the floating object suction prevention cover 30 is attached as in the present invention, the opening 31 for sucking water faces downward, and the position thereof is lower than the position of the water intake 6, so that the water level where the suction vortex is generated is reduced. It can be made quite low, and more water in the water tank S can be drained accordingly.
[0021]
That is, the position of the opening 31 is positioned below the center axis L of the impeller 4 of the pump P installed substantially horizontally with respect to the water surface of the water tank S, or the floating substance suction prevention cover 30 is not attached. It should be located at a position lower than the lowest water surface. In any case, the suction of the floating substance 50 and the suction of air are less likely to occur than when the floating substance suction prevention cover 30 is not attached.
[0022]
Furthermore, since the pump P used in this embodiment is a vortex pump, water does not flow between the impellers 4 and is structured to lift water by forming a vortex by applying centrifugal force to the water. However, even if underwater suspended matter or the like that cannot be prevented from flowing in is sucked into the pump P, it can be easily drained. From this point, it is not necessary to install a large dust removal facility on the upstream side of the unit pump 100.
[0023]
In the above embodiment, the belt-wrapping conduction device is used as the winding conduction device constituting the drive transmission device T, but other winding conduction devices such as a chain-wrapping conduction device may be used.
[0024]
FIG. 4 is a perspective view showing a suspended matter suction prevention cover 30-2 according to another embodiment. In the floating substance suction prevention cover 30-2 shown in the figure, a comb-like screen 33 is provided around the opening 31-2 so as to protrude in a conical shape protruding downward at predetermined intervals. If comprised in this way, the penetration | invasion to the opening 31-2 can be prevented because the underwater suspended matter which settled with the flow of the water which flows between the screens 33 is caught on this screen 33. FIG. That is, it is possible to prevent not only water surface floating material but also water floating material from entering the unit pump 100.
[0025]
The reason why the shape of the screen 33 is substantially conical in the above-described embodiment is that the suspended matter captured by the screen 33 when the pump unit 100 is pulled up can be easily detached from the screen 33. Therefore, the shape of the screen 33 may be other pyramids such as a quadrangular pyramid, and may be other various shapes such as a column shape.
[0026]
FIG. 5 is a perspective view showing the unit pump 100 to which the suspended matter suction prevention cover 30-3 according to the reference example is attached. The floating substance suction prevention cover 30-3 according to this reference example is configured to be bent downward so that the opening 31-3 of the pipe faces downward. Even if it comprises in this way, since the position of the opening 31-3 which sucks in water becomes lower than the position of the water intake port 6, if the water surface floating substance 50, such as a plastic container and a wooden piece floating on the water surface, becomes difficult to suck in. At the same time, the water level until the air starts to be sucked can be made considerably low, and more water in the water tank S can be drained accordingly. As shown in FIG. 4, comb-like screens may be provided around the opening 31-3 of the floating substance suction prevention cover 30-3 at predetermined intervals.
[0027]
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 and the specification and drawings. Is possible. Note that any shape, structure, or material not directly described in the specification and drawings is within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, although the vortex pump is used as the non-occlusion type pump in the above embodiment, the present invention is not limited to this, and other non-occlusion type pumps such as a non-clog type pump or a screw type spiral pump may be used. . If only the floating substance suction prevention cover is sufficient, a pump other than the non-occlusive pump may be used.
[0028]
【The invention's effect】
As described in detail above, the present invention has the following excellent effects.
(1) Since the suspended matter suction prevention cover is attached to the water intake, the minimum suction water level can be lowered, and at the same time, the suspended matter can be hardly sucked, and the dust removal equipment can be simplified or omitted.
[0029]
(2) If a screen that protrudes in the shape of a cone or rod so as to protrude downward at a predetermined interval around the opening on the suction side of the floating substance suction prevention cover is provided, the floating substance is further suspended. The effect of preventing inhalation increases.
[0030]
(3) When an unoccluded vortex pump, non-clog pump or screw-type spiral pump is used as the pump, suspended matter that cannot be blocked by the suspended matter suction prevention cover will be sucked into the pump. This can be easily drained. Also from this point, it is not necessary to install a large dust removal facility upstream of the unit pump.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of pump equipment using a unit pump 100 according to an embodiment of the present invention.
2 (a) and 2 (b) are perspective views of the unit pump 100 shown in FIG. 1 as seen from different surfaces.
3A and 3B are diagrams showing the unit pump 100, in which FIG. 3A is a front view, FIG. 3B is a cross-sectional view taken along line BB of FIG. 1A, and FIG. ) Is a cross-sectional view taken along the line C-B of FIG. 4B, and FIG.
FIG. 4 is a perspective view showing a suspended matter suction prevention cover 30-2 according to another embodiment.
FIG. 5 is a perspective view showing a unit pump 100 to which a suspended matter suction prevention cover 30-3 according to a reference example is attached.
FIG. 6 is a diagram showing a conventional pump facility.
FIG. 7 is a diagram showing a problem of conventional pump equipment.
[Explanation of symbols]
100 Unit pump 1 Pump discharge port 2 Motor shaft 3 Pump shaft 4 Impeller 5 Swirl chamber (vortex space)
6 Water intake 7 Motor mounting hole cover 8 Pump casing 10 Base plate 11 Belt 15 Casing 25 Discharge pipe 27 Backflow prevention valve 30 Floating substance suction prevention cover 31 Opening 43 Pulley 50 Water surface floating substance 81 Impeller housing part 93 Pulley P Pump M Underwater motor T drive transmission device L central axis S water tank 30-2 floating substance suction prevention cover 31-2 opening 33 screen 30-3 floating substance suction prevention cover 31-3 opening

Claims (3)

A unit pump having a structure in which a pump, a submersible motor, and a drive transmission device that transmits the power of the submersible motor to the pump are attached to the plate-like base plate, and the liquid sucked from the water intake port of the pump is drained from the discharge port by driving the pump. In
The pump is constituted by a pump casing attached to one surface of the plate-like base plate and an impeller accommodated in a lower portion of the pump casing, and the water intake is provided in a portion facing the impeller of the pump casing,
On the other hand, the submersible motor is attached to the upper part inside the pump casing, and the pump and the submersible motor are attached to the plate-like base plate so that the central axis of the impeller of the pump and the motor axis of the submersible motor are parallel to each other. Performed so as to be perpendicular to the plate-like base plate,
By attaching a Kamaboko type floating matter suction prevention cover to the intake port, the opening on the suction side of this floating matter suction prevention cover is directed downward,
The position of the opening should be positioned below the central axis of the pump impeller installed substantially horizontally with respect to the water surface, and the surface of the opening should be approximately horizontal with respect to the water surface. A featured unit pump.   2. A screen is provided around the suction side opening of the floating matter suction prevention cover so as to protrude in a conical shape or a rod shape so as to protrude downward at predetermined intervals so as to hook the floating matter. The unit pump described.   3. The unit pump according to claim 1, wherein the pump is a non-blocking vortex pump, a non-clog pump, or a screw spiral pump.

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