KR101782058B1 - Non-clog submerged pump - Google Patents

Abstract

The present invention relates to a submerged submerged pump for transferring a fluid through an impeller having a spiral flow path so as to prevent clogging of an underwater pump due to a foreign substance in the fluid passing through the submerged pump.
More specifically, a casing 100 having a suction port 110 formed on a lower surface thereof and a discharge port 120 formed on a side surface thereof, an underwater motor 200 provided on the casing 100 to provide power, And an impeller 300 provided in the motor 100 and adapted to engage with the underwater motor 200 to draw fluid into the inlet 110 through rotation and discharge the fluid to the outlet 120. The impeller 300 ) Has a cylindrical shape and a helical impeller blade (310) formed outwardly from a central axis of the impeller (300) forms a spiral flow path to transfer the fluid. .

Description

{NON-CLOG SUBMERGED PUMP}

The present invention relates to a submerged submerged pump for transferring fluid through a closed impeller having a helical flow path so as to prevent clogging of the underwater pump due to foreign substances in the fluid passing through the submerged pump.

Generally, an underwater pump is an electric pump that operates in water and can be put into water as an electric motor.

It is mainly used in water supply and drainage, water supply, home water well, pumping water facility, etc. It does not need a foot valve or suction hose, Because it is easy to handle the absorption operation, it is widely used for construction work.

Therefore, the fluid conveyed through the underwater pump can be not only water but also muddy water containing stones, mud, sand, earth, etc., and can be waste water containing various foreign substances such as fibers, solids, and sludge.

When the fluid is transported through a submerged pump, the foreign matter in the fluid is wound on the impeller in the pump or the impeller is prevented from rotating, and the flow path in the submerged pump is clogged, causing problems such as shortening the life of the submerged pump, do.

In addition, maintenance and repair work such as disassembling and removing the pump and the impeller to remove impurities in the impeller increases the maintenance cost, resulting in lowering of the durability of the underwater pump.

Therefore, as a prior art for solving the above problems, JP-A-10-1497052 discloses a "submersible pump having a foreign matter cutting and crushing function ".

In the prior art, the outer cutting edge and the inner cutting edge are provided on the rotating blade of the impeller to discharge the foreign matter mixed in the suction fluid in a cut-off state, thereby preventing the drop in discharge amount and the breakdown due to the foreign matter. And more particularly, to a submersible pump having a foreign matter crushing function capable of securing a pumping performance suitable for a high pump efficiency and a large flow rate middle and low lift.

However, the prior art is only to crush foreign matter in the fluid, and the crushed foreign matter may be wound on the impeller to interfere with the rotation. Rather, the crushed foreign matter may collide with the impeller blades, resulting in additional noise and vibration problems.

In addition, even if the foreign matter is crushed and discharged, there is a possibility that foreign matter that is crushed when used for a long period of time is trapped in the gap between the impeller and the pump or remains inside the discharge port to clog the flow path, thereby deteriorating the performance of the underwater pump.

Therefore, it is necessary to design a structure in which the impurities in the fluid can be prevented from being wound or caught on the impeller blades, or the design related to the impeller blades forming the flow path in the impeller, and a wide flow path for smooth fluid movement is secured. It is necessary to develop a submersible pump capable of preventing clogging of a submerged pump without remaining foreign matter in the fluid inside the submersible pump.

Patent Registration No. 10-1497052 (Bulletin of Feb. 27, 2015)

Disclosure of Invention Technical Problem [8] The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a novel impeller with a closed impeller having a spiral wide flow path width which can prevent foreign matters in the fluid from getting caught in the impeller blades, The log is to provide an underwater pump.

Another object of the present invention is to provide a submerged submerged pump capable of preventing a leakage phenomenon in which a fluid leaks into a fine gap formed between a casing and an impeller.

It is still another object of the present invention to provide a submerged underwater pump capable of easily separating a motor from an underwater pump without necessity of disassembling the impeller during maintenance.

In a submerged submerged pump capable of mounting a sensor to achieve the object of the present invention,

A casing 100 having a suction port 110 formed on a lower surface thereof and a discharge port 120 formed on a side surface thereof; an underwater motor 200 provided on the casing 100 to provide power; And an impeller 300 coupled to the underwater motor 200 for sucking fluid into the suction port 110 through rotation and discharging the fluid to the discharge port 120. The impeller 300 has a cylindrical shape And a spiral-shaped impeller blade 310 formed outwardly from the central axis of the impeller 300 forms a spiral flow path to transfer the fluid.

The sub-logarithmic submerged pump according to the present invention has a remarkable effect of preventing the impurities in the fluid from being caught by the impeller blades or blocking the flow path by maintaining the spiral wide flow path width of the curved surface of the impeller, do.

Further, the non-circulating submerged pump according to the present invention has a remarkable effect that the water leakage due to the internal pressure difference can be prevented by closely holding the minute gap between the wear ring and the impeller through the leakage preventing o-ring having the elastic force.

The submerged submerged pump according to the present invention has a remarkable effect that the underwater motor can be easily separated from the casing without detaching the impeller during maintenance by directly coupling the underwater motor and the impeller.

1 schematically shows a submerged underwater pump according to the present invention.
Figs. 2 and 2a show the joining and separating examples of the present invention in the forward section and the partial enlargement.
3 is an exploded perspective view of a submerged submerged pump according to the present invention.
4 shows the impeller of the present invention.
Figures 5 and 6 illustrate the flow path of the fluid through the impeller of the present invention.
Fig. 7 shows a leakage preventing o-ring according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor can properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents And variations are possible.

Before describing the present invention with reference to the accompanying drawings, it should be noted that the present invention is not described or specifically described with respect to a known configuration that can be easily added by a person skilled in the art, Let the sound be revealed.

The present invention relates to a submerged submerged pump for transferring a fluid through an impeller having a spiral flow path so as to prevent clogging of an underwater pump due to a foreign substance in the fluid passing through the submerged pump.

Such a non-circulating submersible pump will be described with reference to FIGS. 1 to 4 attached hereto.

FIG. 1 is a schematic representation of a submerged underwater pump according to the present invention, wherein FIGS. 2 and 2a show the combination and separation example of the present invention in front elevation and partial enlargement, and FIG. Fig. 4 shows the impeller of the present invention. Fig.

The submersible submersible pump comprises a casing (100), an underwater motor (200) and an impeller (300).

The casing 100 is provided with an impeller 300 on the inner side and an underwater motor 200 for driving an underwater pump on the upper side.

The casing 100 is provided at its lower side with a suction port 110 capable of sucking a fluid and a discharge port 120 through which the fluid sucked into the suction port 110 is discharged to the outside through a side surface have.

An underwater motor 200 may be provided on the upper side of the casing 100 through an opening 130 opened to allow the inside and the outside of the casing 100 to communicate with each other.

That is, the underwater motor 200 provided on the casing 100 through the opening 130 and the impeller 300 provided inside the casing 100 can be combined.

The casing 100 is connected to the suction port 110, the discharge port 120 and the opening 130 while the opening 130 is connected to the underwater pump 200 when the underwater pump 200 and the impeller 300 are coupled. The opening 130 is closed through the lower surface and the fluid that has entered the inlet 110 is transferred to the discharge port 130 along the flow path formed in the impeller 300 and is discharged to the outside.

In addition, a wear ring 140 may be additionally provided on the inner side of the suction port 110.

The outer circumferential surface of the wear ring 140 corresponds to the inner circumference of the inlet 110. The inner circumferential surface of the outer circumferential surface has a shape corresponding to the lower portion of the impeller 300, As shown in FIG.

The wear ring 140 is formed in a groove formed in the inside of the intake port 110 to prevent pressure loss and leakage of the fluid in the casing 100. The wear ring 140 is fitted inside the wear ring 140 with a lower portion of the impeller 300 It is possible to prevent the fluid from leaking.

At this time, the wear ring 140 is preferably made of a bronze material for preventing rust and durability, but is not limited thereto.

The submersible motor 200 serves to drive the submersible submerged pump by transmitting the rotational force of the impeller 300 and is provided on the casing 100.

A power shaft 210 protruding downward is formed at the bottom center of the submersible motor 200. The power shaft 210 is engaged with the coupling groove 320 formed at the center of the upper surface of the impeller 300. [

The submersible motor 200 and the impeller 300 connected through the coupling of the power shaft 210 and the coupling groove 320 rotate together with the impeller 300 through the rotation of the submersible motor 200, (300) sucks the fluid into the suction port (110) and can transfer the sucked fluid to the discharge port (120).

The lower center of the power shaft 210 is depressed and the depressed portion is coupled through a separate coupling member 211 so that the coupling between the underwater pump 200 and the impeller 300 can be made strong.

At this time, it is preferable that the engaging member 211 is engaged with a coupling member such as a hexagonal socket bolt and a spring washer having a function of preventing loosening of the hexagonal nut.

On the other hand, in the case of foreign matter such as fibers in the fluid, rope, green alga, etc., there is a fear that the performance of the underwater pump is lowered by being wound around the coupling member 211 or the power shaft 210.

The shaft cap 220 may be additionally formed to prevent foreign matter from contacting the power shaft 210 and the coupling member 211 coupled to the coupling groove 320 of the impeller 300. [

The shaft cap 220 has a ring shape and covers the power shaft 210 drawn along the inside of the coupling groove 320 and the coupling member 211 engaged with the power shaft 210 to prevent contact with foreign substances in the fluid. .

The shaft cap 220 is fastened to the inside of the coupling groove 320 and fastened to the hole formed at the center of the shaft cap 220 so as to fix the impeller 300 firmly And the area of contact of the fluid with the coupling member 211 is minimized, so that corrosion of the coupling member 211 can be minimized.

The power shaft 210 is drawn into the coupling groove 320 and the underwater motor 200 and the impeller 300 are firmly connected to each other through the coupling member 211 and the shaft cap 220, And it is advantageous in that the assembling process is also simple.

The opening 130 can be closed by a method in which the underwater motor 200 is stacked on the upper portion and the casing 100 can be easily separated from the underwater motor 200 without disassembling the impeller 300 in the underwater pump. It is possible to efficiently carry out maintenance work such as inspection and parts exchange.

4A and 4B, the impeller 300 is designed as a cylindrical shape having a spiral wide flow path connecting the suction portion 341 and the discharge portion 342 of the lower surface. At this time, the flow path is a space formed along the inner circumferential surface of the impeller blade 310 formed at the center of the impeller 300 and the outer circumferential surface of the impeller 300, and the fluid sucked into the suction portion 341 through the rotation, And is moved to the discharge portion 342 along the inner flow path.

The impeller blade 310 is spirally shaped in an outward direction from the central axis of the impeller 300. The impeller blade 310 forms a wide flow path, and the fluid is transferred to the discharge port 120 along the impeller blade 310 and the inside of the casing 100 (see FIG. 4C).

At this time, the length of the flow path can be adjusted according to the degree to which the helical curve forming the impeller blade 310 is twisted, so that the discharge pressure can be reduced or increased. Thus, the manufacturer designs and manufactures the degree of twist of the impeller blades 310 in accordance with his / her intention.

The impeller 300 according to the present invention does not have a plurality of blades and the fluid is transported along the inside of the single impeller blade 310 formed at the center and the inside of the impeller 300 and moves along the inside of the impeller 300 The fluid moves along the inside of the casing 300 together with the rotation of the impeller 300 and is discharged to the discharge port 120.

The upper and lower portions of the impeller 300 are respectively formed of a closed impeller 300 having upper and lower shrouds 330 and 340 and a fluid is supplied through the upper and lower shrouds 330 and 340 to the casing 100 And the impeller 300 is prevented from being leaked.

On the other hand, the upper shroud 330 can prevent the fluid sucked in the K direction from the ground from rising to prevent vibration from being transmitted to the submersible motor, 331 may be additionally formed.

At this time, the inclined surface 331 serves as a guide to help the fluid move along the inner side of the outer peripheral surface of the impeller 300.

The lower shroud 330 is provided with a suction portion 341 communicating with the inside of the impeller 300. The fluid that has been transferred from the suction hole 341 to the inside of the impeller 300 is discharged to the suction port 110 again Thereby sealing the lower portion of the impeller 300 to prevent it.

In addition, it is possible to prevent a foreign matter from being caught in the gap between the casing 100 and the impeller blade 310 through the lower shroud 330.

The flow of the fluid through the impeller 300 will be described in detail with reference to FIGS. 5 and 6. FIG.

Figures 5 and 6 illustrate the flow path of the fluid through the impeller of the present invention.

5, the flow path of the fluid indicated by the bold arrow is configured such that the fluid drawn into the impeller through the suction hole 341 of the impeller 300 is discharged to the outside through the discharge port 120 along the spiral flow path formed by the curved surface do.

At this time, the fluid is transported to the impeller 300 through the spiral flow path formed inside the casing 100 and the impeller blade 130 formed spirally outward from the central axis of the impeller 300. The structure of the impeller is relatively simple.

This is because the conventional impeller having a plurality of blades has a problem in that the flow path is formed at intervals between the blades, resulting in clogging due to a narrow flow path and performance deterioration. On the other hand, the impeller 300 according to the present invention has a wide width, A large solid material in the fluid can be easily transferred through the spiral flow path through the impeller blade 310 of the impeller blade 310 and the phenomenon of foreign matter being caught or tangled can be prevented.

6, the casing 100 is indicated by a solid line in order to confirm the rotation of the impeller 300 drawn in the casing 100 and the flow path formed therein, and the casing 100 is made transparent, So that it can be seen that the rotating shaft 300 rotates.

It is also known in advance that the flow of the fluid is represented by an arrow formed by a dotted line.

When the impeller 300 rotates (in the direction of a thick arrow) as shown in FIG. 6A, the fluid existing in the lower portion is sucked into the lower portion of the casing 100 by the centrifugal force and sucked into the flow path in the impeller 300. The fluid sucked into the flow path in the impeller 300 rotates together with the impeller 300 along the impeller blade 310 and the flow path formed inside the casing 100 and is discharged to the discharge port 120 (see FIG.

Thereafter, as the impeller 300 rotates, the width communicated with the flow path in the impeller 300 and the discharge port 120 increases, and the fluid moves along the flow path in the casing 100 by the centrifugal force d).

When the impeller 300 rotates, there is a difference between the pressure of the suction hole 341 and the pressure of the discharge port 120. This pressure difference causes the fine gap between the wear ring 140 and the impeller 300 Leakage occurs inevitably due to the gap (see Fig. 7a).

The efficiency of the underwater pump is lowered when the water leakage phenomenon occurs in the casing 100. The impeller 300 rotating in the casing 100 has a large influence on the inside of the casing 100 and the wear ring 140, It is necessary to rotate with a gap, so that a leakage phenomenon due to a micro gap is inevitably generated.

Accordingly, in the present invention, the leakage preventing O-ring 400 may be additionally formed at a position where the wear ring 140 and the impeller 300 are coupled.

Fig. 7 shows a leakage preventing o-ring according to the present invention.

At this time, in FIG. 7, it is indicated in advance that the arrow indicates the direction in which the fluid leaks.

The leakage preventing O-ring 400 has a ring shape having an elastic force and has a shape corresponding to the lower outer circumferential surface of the impeller 300. The leakage preventing O-ring 400 inserted along the lower outer circumferential surface of the impeller 300 can maintain a close gap between the wear ring 140 and the impeller 300 through the elastic force when the pressure difference occurs, (See Fig. 7b).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims There will be

100: casing 110: inlet
120: discharge port 130:
140: Wear ring 200: Underwater motor
210: power shaft 211: coupling member
220: Axial cap 300: Impeller
310: impeller blade 320: engaging groove
330: upper side shroud 331:
340: Lower shroud 341: Suction part
342: Discharging portion 400: O-ring for preventing water leakage

Claims (5)

A casing 100 having a suction port 110 formed on a lower surface thereof and a discharge port 120 formed on a side surface thereof;
An underwater motor (200) provided on the casing (100) to provide power; And
And an impeller 300 provided in the casing 100 and connected to the submersible motor 200 to suck the fluid into the suction port 110 through rotation and discharge the fluid to the discharge port 120,
The impeller 300 has a cylindrical shape and has a spiral impeller blade 310 formed in a direction outward from the central axis of the impeller 300. The impeller 300 forms a spiral flow path to transfer the fluid,
The underwater motor 200 is formed with a power shaft 210 protruding downward at the center of the lower surface,
The impeller (300)
A spiral impeller blade 310 having a cylindrical shape and formed in an outward direction from a center axis of the impeller 300 forms a helical flow path to transfer the fluid,
An engaging groove 320 which is recessed upward in the center of the upper surface,
The power shaft 210 is fitted into the coupling groove 320 so that the rotational force of the submersible motor 200 is transmitted to the impeller 300,
A shaft cap 220 is provided inside the coupling groove 320,
The shaft cap 220 has a ring shape and is coupled to the power shaft 210 drawn along the inside of the coupling groove 320 and the outer surface of the coupling member 211 coupled to the power shaft 210 The coupling member 211 coupling the power shaft 210 and the coupling groove 320 is prevented from contacting the foreign matter in the fluid and the impeller 300 can be firmly fixed. Underwater pump.
delete delete The method according to claim 1,
A wear ring 140 is additionally provided inside the suction port 110,
Wherein the impeller (300) is inserted into the wearer (140) to prevent the fluid in the impeller (300) from leaking to the outside of the intake port (110).
The method of claim 4,
The submerged pump further includes a waterproof O-ring (400)
The water-proof O-ring (400)
And is formed of a material having elasticity,
And the impeller (300) is coupled between the wear ring (140) and the impeller (300).

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