KR102306383B1 - A underwater pump with suction device for pumping water of low level - Google Patents

Abstract

The present invention relates to an underwater pump and, more specifically, to an underwater pump with a low-water suction device, which can be attached or detached from a suction port of a suction cover to enable pumping even when a water level is lower than that in the suction port located on the front of an impeller. The underwater pump comprises: an electric motor; an impeller rotated by receiving rotational force from the electric motor; a casing having the impeller built therein, and having an outlet formed in one side thereof; and a suction cover coupled to an open front surface of the casing, and having a suction port formed in the center thereof, and further comprises: a lower cover placed on the bottom surface thereof on which the underwater pump is to be installed; an upper cover placed on the upper surface of the lower cover, spaced apart from the lower cover by an interval, having a flow path formed thereinside, having inflow gaps formed at the edge thereof to introduce a fluid by pumping, and having a through hole formed in the surface thereof to communicate the flow path with the outside; and a fluid transfer pipe for connecting the suction port of the suction cover provided in the underwater pump and the through hole, and having therein a fluid transfer path along which the fluid introduced into the inflow gaps by pumping and discharged through the through hole is transferred and introduced into the suction port.

Description

A UNDERWATER PUMP WITH SUCTION DEVICE FOR PUMPING WATER OF LOW LEVEL

The present invention relates to a submersible pump, and more particularly, to a submersible pump equipped with a suction device for low water level detachably attached to the suction port to enable pumping even when the water level is lower than the suction port of the suction cover located on the front of the impeller.

In general, submersible pumps are installed in places such as water purification plants, wastewater treatment plants, and basements where flooding is expected for the purpose of discharging water to the outside.

The submersible pump is a pump that operates in a state in which the entire pump is submerged in water. A pump that is connected to an electric motor that generates rotational force by receiving external power and is connected to the front of the electric motor to rotate the impeller with the rotational force of the electric motor to pump the fluid. consists of wealth.

The pumping part consists of a casing in which the impeller is built, and a suction cover coupled to the open front surface of the casing. An outlet is formed on the side of the casing, and an inlet is formed in the center of the suction cover.

Submersible pumps are divided into self-supporting and self-removing types according to the installation method.

The freestanding type has a stand of a certain height mounted on the front of the suction cover of the pumping unit, and is built up on the floor by the stand.

The automatic detachable type has a structure in which a separate support having a certain height is installed on the floor and fixed to the support by connecting the outlet of the pumping part.

In this submersible pump, when the impeller is rotated by the driving of the electric motor, the fluid is introduced into the casing through the suction port, is pumped, and is discharged at a high pressure through the discharge port.

However, the conventional submersible pump has a problem in that it is impossible to pump the fluid when the water level is lower than the suction port because the suction port is located at a certain height from the floor by the stand and the support.

Republic of Korea Registered Utility Model Publication No. 20-0465024. Republic of Korea Patent Publication No. 10-1790957.

Accordingly, the present invention has been devised to solve the above problems, and an object of the present invention is to provide a submersible pump equipped with a suction device for low water level that is detachably attached to the suction port so that the fluid can be pumped even when the water level is lower than the suction port is to do

In addition, the present invention is to provide a submersible pump equipped with a suction device for a low water level, which is easily installed by adjusting the height of the suction device in the case of installing the suction port easily.

A submersible pump equipped with a suction device for low water level according to the present invention for achieving the above object includes an electric motor, an impeller rotating by receiving rotational force from the electric motor, a casing in which the impeller is built in, and an outlet formed on one side; , In the submersible pump comprising a suction cover coupled to the open front of the casing and formed with a suction port in the center,

And a lower cover placed on the bottom surface to be installed submersible pump; It is placed on the upper surface of the lower cover and spaced apart from the lower cover by a predetermined distance to form a flow path inside, and an inflow interval is formed at the edge to allow the fluid to flow in by pumping, and the flow path penetrates the outside at the surface. an upper cover in which a through hole is formed; The suction port of the suction cover provided in the submersible pump and the through hole are connected, and a fluid conveying path is formed therein so that the fluid introduced at the inlet interval by pumping and discharged through the through hole is transferred and introduced into the suction port. The pipe is further included.

In addition, the present invention includes a female screw portion extending a predetermined distance toward the bottom surface at the edge of the suction port of the suction cover and having a female screw thread formed on the inner surface; The front end of the fluid conveying pipe further includes a male screw portion having a male screw thread for screwing with the female screw portion.

In addition, the present invention is a packing body that is screwed into the male screw portion and watertightly seals the coupling portion of the male screw portion and the female screw portion, and is penetrated so as to be screwed to the male screw portion in a central portion and has a female screw thread formed on the inner side thereof, and the a packing member provided on the upper edge of the packing body and formed of a flange in close contact with the front surface of the female screw part; By being screwed into the male screw portion, the outer surface of the packing body and the flange of the packing member are pressed, and the male screw portion is coupled to the male screw portion to generate a predetermined adhesion to the female screw portion to prevent the male screw portion from being loosened from the female screw portion. An auxiliary nut is further included,

The lower cover and the upper cover are formed in a circular plate, the through hole is formed in the center of the upper cover, and the fluid introduced at the inflow interval is vortexed in the flow path between the lower cover and the upper cover. It is characterized in that a spiral fluid guide vane is formed so as to be formed and discharged to the through hole.

In the present invention, a fluid transport pipe protruding toward the floor is coupled to the suction port of the suction cover, and a lower cover and an upper cover that are in close contact with the bottom surface are provided at the ends to suck the fluid, so that the fluid at a lower level than the suction port. It also has the advantage of being able to pump.

In addition, the present invention has the advantage of being able to pump a large amount of fluid per unit time because the suction power is excellent because the pumped fluid is sucked while rotating.

In addition, the present invention has the advantage that it can be easily attached to and detached from the suction port of the suction cover by screwing, and the protrusion distance from the suction port can be easily and accurately adjusted.

1 is a view showing an embodiment of a suction device in a submersible pump equipped with a suction device for a low water level according to the present invention;
Figure 2 is an exploded view showing an embodiment of Figure 1;
3 is a view showing a state in which the embodiment of FIG. 1 is mounted on the suction port of the suction cover to advance and retreat;
Figure 4 is a view showing an embodiment of Figure 1 is mounted on a self-supporting submersible pump,
5 is a view showing a state in which the embodiment of FIG. 1 is mounted on an automatic detachable submersible pump;
6 is an exploded view showing a state in which a packing member and an auxiliary nut are further provided in the suction device in the submersible pump provided with the suction device for low water level according to the present invention.
7 is an assembly view showing a state in which a packing member and an auxiliary nut are further provided in the suction device in the submersible pump having the suction device for low water level according to the present invention.

Hereinafter, an embodiment of a submersible pump equipped with a suction device for low water level according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 7 show an embodiment of a submersible pump equipped with a suction device for a low water level according to the present invention.

1 to 5 , an embodiment of a submersible pump provided with a suction device for low water level according to the present invention includes a lower cover 100 placed on a bottom surface where the submersible pump is to be installed, and an upper portion of the lower cover 100 . Fluid transfer connecting the upper cover 200 spaced apart from each other at a predetermined interval, the through hole 210 penetrating the surface of the upper cover 200 and the suction port 11 of the suction cover 10 provided in the submersible pump A pipe 300 is further included.

The lower cover 100 and the upper cover 200 are formed in a circular plate shape, and may be formed of a metal material having strength, or may be formed of a rubber material which is a flexible material that can be easily deformed in appearance by an external force.

A through hole 210 having a predetermined diameter is formed in the central portion of the upper cover 200 .

A fluid guide vane 400 helically protruding around the through hole 210 is formed on the opposite surface of the lower cover 100 and the upper cover 200 . The lower cover 100 and the upper cover 200 are coupled to each other in close contact with the upper surfaces of the protruding fluid guide vanes 400 . Accordingly, a spiral flow path 410 is formed between the lower cover 100 and the upper cover 200 . The spiral flow path 410 causes the incoming fluid to be rotated and discharged through the through hole 210 .

The edges of the combined lower cover 100 and the upper cover 200 are spaced apart from each other and an open inflow gap 420 is formed. The inflow gap 420 is the inlet of the spiral flow path 410 .

The fluid transport pipe 300 is formed as a cylindrical pipe having a predetermined inner diameter in which the fluid transport path 310 is formed. The fluid conveying pipe 300 may be formed of a metal material having strength or a rubber material that is a flexible material that is easily deformed by an external force. It can also be formed of a bellows-type flexible steel, synthetic resin, or rubber pipe. The bellows type pipe can be varied in length or can be easily bent in various directions.

On the other hand, the coupling between the fluid transport pipe 300 and the suction port 11 of the suction cover 10 is made in a screw coupling method. The screw coupling method facilitates detachment of the fluid transport pipe 300 , and the protrusion distance from the suction port 11 is adjusted as the fluid transport pipe 300 rotates forward and reverse.

At the edge of the suction port 11 of the suction cover 10, a female threaded portion 12 extending outward by a predetermined distance toward the bottom surface and having a female thread formed on the inner surface protrudes. In addition, a male screw part 320 having a male screw thread formed on the outer surface is provided at the front end of the fluid transport pipe 300 .

The protrusion distance of the female screw part 12 and the formation distance of the male screw part 320 may be sufficiently formed to match the protrusion distance of the fluid transport pipe 300 to be adjusted.

6 and 7, an embodiment of the present invention provides a packing member 500 for watertightening the coupling portion between the female screw part 12 and the male screw part 320, and the packing member 500 is a female screw. An auxiliary nut 600 is further provided to adhere to the part 12 and prevent the male screw part 320 from loosening.

The packing member 500 is screw-coupled by being inserted into the male screw part 320, and the central part is penetrated and a female thread is formed on the inner surface of the packing body 510, and the upper edge of the packing body 510 extends horizontally in an annular shape. It consists of a flange 520 .

The packing member 500 is made of a rubber material having elasticity, and is in close contact with the female screw part 12 and the male screw part 320 by the auxiliary nut 600 to make the coupling part watertight. That is, the packing body 510 is in close contact with the male screw part 320 , and the flange 520 is in close contact with the front surface of the female screw part 12 .

The auxiliary nut 600 is a nut screwed to the male screw part 320, and moves forward and backward by forward and reverse rotation on the male screw part 320 to bring the packing member 500 into close contact with the male screw part 320 while the female screw part 12 and A predetermined pressing force and adhesive force are generated between the auxiliary nuts 600 .

The pressing force and adhesion generated between the female screw part 12 and the auxiliary nut 600 strengthen the screw coupling between the male screw part 320 and the female screw part 12, so that the male screw part 320 is loosened from the female screw part 12. it is prevented That is, the fluid transport pipe 300 is prevented from loosening due to external vibration from the suction port 11 .

Hereinafter, the operation and effect of an embodiment of the submersible pump provided with the suction device for low water level according to the present invention configured as described above will be described.

In the present invention, the fluid transport pipe 300 is manufactured to have an appropriate length according to the type of the submersible pump to be installed. That is, in the case of a self-supporting submersible pump, the length of the fluid transport pipe 300 is determined so that the lower cover 100 is in close contact with the floor according to the height of the stand 20, and the automatic detachable type is at the height of the support 30. The length of the fluid transport pipe 300 may be determined accordingly.

On the other hand, when the fluid transport pipe 300 is screwed to the suction port 11, the protrusion distance from the suction port 11 can be adjusted by rotating the fluid transport pipe 300, so that the lower cover 100 is easily and accurately adhered to the floor surface. can do it

In addition, when the lower cover 100, the upper cover 200, and the fluid transport pipe 300 are formed of a flexible material, the lower cover 100 is easily deformed along the bottom surface on an uneven bottom surface, and the fluid transport pipe ( 300) is bent in various directions, so that the adhesion rate between the lower cover 100 and the non-uniform bottom surface can be further improved.

In this way, when the lower cover 100 is in close contact, the inflow interval 420 through which the fluid is introduced approaches the bottom surface. Therefore, when the submersible pump is operated, it is possible to pump the fluid even at a low water level, which was not possible in the prior art. That is, by the stand 20 and the support 30, it is possible to pump the fluid at a level lower than the suction port 11 of the suction cover 10 located at a predetermined height from the floor.

The fluid introduced through the inflow gap 420 is rotated along the flow path 410 spirally formed by the fluid guide vane 400 and exits the through hole 210 of the upper cover 200 . Accordingly, the suction power is superior to that of the fluid pumped in the linear direction, so that a large amount of fluid can be smoothly sucked per unit time.

On the other hand, the packing member 500 is to prevent a decrease in the pumping force of the submersible pump by watertightening the threaded portion of the suction port 11 and the fluid transport pipe 300 .

The auxiliary nut 600 transports fluid by vibration generated due to the driving of the submersible pump and vibration generated in the process of passing the fluid transport path 310 of the flow path 410 and the fluid transport pipe 300 as the fluid rotates. The pipe 300 is loosened from the inlet 11 to prevent loosening.

10: suction cover 11: suction port
12: female thread part 20: stand
30: support 100: lower cover
200: upper cover 210: through hole
300: fluid transport pipe 310: fluid transport path
320: male thread 400: fluid guide vane
410: Euro 420: Inflow interval
500: packing member 510: packing body
520: flange 600: auxiliary nut

Claims (3)

delete An electric motor, an impeller rotating by receiving rotational force from the electric motor, a casing in which the impeller is built-in and an outlet hole is formed on one side, and a suction cover coupled to the open front surface of the casing and having a suction port formed in the center. In the submersible pump,
a lower cover placed on the bottom surface;
It is placed on the upper surface of the lower cover and spaced apart from the lower cover by a predetermined distance to form a flow path inside, and an inflow interval is formed at the edge to allow the fluid to flow in by pumping, and the flow path penetrates the outside at the surface. an upper cover in which a through hole is formed;
Connecting the suction port and the through hole of the suction cover provided in the submersible pump, a fluid transfer path is formed therein so that the fluid introduced at the inlet interval by pumping and discharged through the through hole is transferred and introduced into the suction port A fluid transport pipe is further included,
a female screw part protruding from an edge of the suction port by a predetermined distance toward the bottom surface of the suction cover and having a female screw thread formed on an inner surface thereof;
The front end of the fluid transport pipe is provided with a male threaded portion screwed with the female threaded portion, and the male threaded portion and the female threaded portion are screwed together so that the fluid transporting pipe protrudes from the suction port by forward and reverse rotation. is made to be possible,
A packing body fitted with the male screw part and screwed to watertightly seal the coupling portion of the male screw part and the female screw part, and a packing body having a female screw thread formed on the inner surface and penetrated to be screwed to the male screw part in a central part; and the upper edge of the packing body a packing member provided in the flange and configured to be in close contact with the front surface of the female screw part;
By being screwed into the male screw portion, the outer surface of the packing body and the flange of the packing member are pressed, and the male screw portion is coupled to the male screw portion to generate a predetermined adhesion to the female screw portion to prevent the male screw portion from being loosened from the female screw portion. A submersible pump with a suction device for low water level, characterized in that it further includes an auxiliary nut.
3. The method of claim 2,
The lower cover and the upper cover are formed in a circular plate,
The through hole is formed in the center of the upper cover,
In the flow path between the lower cover and the upper cover, a helical fluid guide vane is formed so that the fluid introduced at the inflow interval is rotated and discharged through the through hole. .

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