KR20170101563A - Submerged motor pump having variable type insertring - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater motor pump provided with an impeller gap variable insert ring and, more particularly, to an adjustable gap between an impeller and an insert ring, Especially, it is possible to prevent the foreign matter of the fibrous material flowing together with the fluid from being wrapped around the impeller, thereby preventing the occurrence of malfunction of the motor and the impeller, thereby improving the efficiency of the pump, The present invention relates to an underwater motor pump having an impeller gap variable insert ring capable of greatly reducing the size of the impeller gap.
An underwater motor pump equipped with an impeller gap variable insert ring according to the present invention comprises: a motor; A lower case having a suction port for sucking the fluid and a discharge port for discharging the sucked fluid; An impeller installed inside the lower case and coupled to the rotation shaft of the motor and rotated; Wherein the impeller includes a circular base plate and a vane protruding in a vertical direction from one surface of the base plate, wherein a hollow is formed and an outer diameter of the impeller is larger than that of the suction port An insert ring installed in the lower case so as to be positioned between the inlet and the impeller; Wherein the lower case is provided with a gap adjusting means for variably controlling an upper and lower distance between the vane end of the impeller and the insert ring by water pressure generated by rotation of the impeller.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an underwater motor pump having an impeller gap variable insert ring,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underwater motor pump provided with an impeller gap variable insert ring and, more particularly, to an adjustable gap between an impeller and an insert ring, Especially, it is possible to prevent the foreign matter of the fibrous material flowing together with the fluid from being wrapped around the impeller, thereby preventing the occurrence of malfunction of the motor and the impeller, thereby improving the efficiency of the pump, The present invention relates to an underwater motor pump having an impeller gap variable insert ring capable of greatly reducing the size of the impeller gap.

Generally, submersible pump is a device that sucks and transfers fluid without direct suction to a separate suction pipe. It is mainly used for pumped water mixed with soil or dirt.

The submersible pump generally includes a motor unit having a rotating shaft rotatably driven by a power supply, a casing coupled to the motor unit and having an intake port and a discharge port, and an impeller rotatably coupled to the rotating shaft, .

Accordingly, when the rotating shaft of the motor unit rotates according to the power supply, the impeller rotates integrally and a negative pressure is formed inside the casing. Accordingly, the fluid flows into the casing through the suction port, And is discharged through a separate supply pipe.

Since the submersible pump operated in this manner is mainly used for pumping sewage mixed with dirt or foreign substances, dirt and foreign substances can be introduced into the pump casing together with the fluid when the fluid is pumped. Damage to the inside of the pump, breakage or failure of the pump frequently occurs.

In the past, foreign substances and trash were present in the sewage, but the pump was not clogged much as it is now. The reason for this is that there are no products such as wet tissues or non-woven cloths that have recently flowed into the sewage. Since many of the foreign substances in the sewage in the past were mostly solid like stones, And has evolved into a pump equipped with an anti-clog impeller capable of handling the air.

In recent years, however, as long as foreign matter such as a fiber structure has appeared, living garbage such as a wet tissue, a waste plastic, a sanitary ware, and the like is prolonged on the leading edge protruding to the antiklog impeller, It is necessary to periodically check the pump to discharge the waste, and in the case of a foreign material such as a cord, a glove, or a thread, it sometimes flows into the casing and winds around the rotating shaft. So that the smooth operation of the underwater pump becomes impossible.

In order to prevent such a problem, a method of installing a separate filtering net at the suction port of the pump is used to prevent dust or foreign matter from entering the inside of the pump casing. Such a structure causes a large amount of solid foreign matter to accumulate in the filter net, There is a problem that the fluid can not be sucked even if the pump is operated. In order to prevent this, there has been a problem that the filter must be cleaned frequently.

On the other hand, in the conventional technology disclosed in Korean Patent Registration No. 10-1497052 entitled " Submerged pump having a foreign matter cutting and crushing function ", an outer cutting edge and an inner cutting edge are provided on a rotary blade of an impeller, Thereby preventing a drop in the discharge amount and a failure due to foreign matter and securing the pumping performance.

However, the underwater pulverizing pump currently used with the prior art has a limit in the size and shape to be cut, as in the case where the cut fiber structure or sludge cut in the cutting mechanism mounted on the suction port side is long and cut And consequently, the impeller inside the casing is clogged to deteriorate the performance or the motor is burned out, and the maintenance and management cost thereof may increase.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an impeller and an insert ring in which the gap between the impeller and the insert ring can be variably controlled through the water pressure acting on the inner space according to the rotation of the impeller, It is easy to treat long foreign matters such as wet tissues or waste vinyls that flow together with the fluid, thereby preventing the overload of the motor and the impeller, thereby increasing the operation efficiency of the underwater pump, The present invention provides an underwater motor pump provided with an impeller gap variable insert ring capable of reducing the size of the impeller gap variable insert ring.

It is another object of the present invention to provide a small sewage pump facility such as a sewage relay pump station where a foreign matter filtering screen is not installed, effectively preventing clogging of foreign matter, and in particular, And an impeller gap variable insert ring capable of drastically reducing wasted tax on the purchase cost and maintenance cost of the relay pump in each local government.

According to an aspect of the present invention, there is provided an underwater motor pump including an impeller gap variable insert ring according to the present invention, including: a motor; A lower case having a suction port for sucking the fluid and a discharge port for discharging the sucked fluid; An impeller installed inside the lower case and coupled to the rotation shaft of the motor and rotated; Wherein the impeller includes a circular base plate and a vane protruding in a vertical direction from one surface of the base plate, wherein a hollow is formed and an outer diameter of the impeller is larger than that of the suction port An insert ring installed in the lower case so as to be positioned between the inlet and the impeller; Wherein the lower case is provided with a gap adjusting means for variably controlling an upper and lower distance between the vane end of the impeller and the insert ring by water pressure generated by rotation of the impeller.

In addition, in the underwater motor pump provided with the impeller gap variable type insert ring according to the present invention, the interval adjusting means may be arranged such that the insert ring is lowered or raised according to the magnitude of the water pressure acting between the impeller and the insert ring. And a first elastic member for elastically biasing the ring upward.

The impeller includes an impeller boss protruding from a center of the base plate and coupled to the rotary shaft and the spline gear, wherein the impeller boss includes: The adjusting means includes a second elastic member for elastically biasing the impeller downward so that the impeller flows upward and downward in accordance with a magnitude of water pressure acting between the impeller and the insert ring.

Further, in the underwater motor pump having the impeller gap variable type insert ring according to the present invention, the insert ring has an annular stopping protrusion protruding downwardly so as to be inserted into the inner circumferential surface of the suction port when the insert ring is lowered.

In the underwater motor pump having the impeller gap variable insert ring according to the present invention, the distance between the impeller and the insert ring can be variably controlled through the water pressure acting on the inner space according to the rotation of the impeller Particularly, it is easy to treat long foreign matters such as wet tissues or waste vinyl fibers that are introduced together with the fluid, thereby preventing overload of the motor and the impeller, thereby increasing the operation efficiency of the underwater pump, It has an advantage that the maintenance cost can be reduced.

Another object of the present invention is to effectively prevent the clogging of foreign objects in a small sewage pump facility such as a sewerage relay pumping station where a foreign matter filtering screen is not installed, and in particular, to prevent the occurrence of a fault in a pump due to a fibrous foreign matter This has the advantage of significantly reducing the blood pressure wasted on maintenance costs of the relay pump in government offices and local governments.

It is another object of the present invention to provide a sewage pump that can maintain a clean environment by increasing the operation efficiency of a sewage pump in a rural area and can provide water more stably to agriculture where timing is important, .

1 is an exploded bottom perspective view of an underwater motor pump having an impeller gap variable insert ring according to an embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an impeller gap variable insert ring for an underwater motor pump.
3 is a partially enlarged cross-sectional view illustrating another example of the operation of the interval adjusting means of the submersible motor pump provided with the impeller gap variable insert ring according to the embodiment of the present invention.
4 is a perspective view showing an insert ring of an underwater motor pump having an impeller gap variable insert ring according to an embodiment of the present invention;

Hereinafter, an underwater motor pump (hereinafter referred to as an "impeller gap variable type submersible motor pump") having an impeller gap variable insert ring according to the present invention will be described in more detail with reference to the embodiments shown in the drawings.

FIG. 1 is an exploded bottom perspective view of an underwater motor pump including an impeller gap variable insert ring according to an embodiment of the present invention. FIG. 2 is a cross- 3 is an enlarged sectional view showing an operation example of the gap adjusting means of the motor pump. Fig. 3 is a view showing another example of the operation of the gap adjusting means of the submersible motor pump provided with the impeller gap variable insert ring according to the embodiment of the present invention FIG. 4 is a perspective view showing an insert ring of an underwater motor pump having an impeller gap-variable insert ring according to an embodiment of the present invention.

Referring to the drawings, an impeller gap variable type submerged motor pump 1 according to an embodiment of the present invention includes a motor 10, a suction port 21 for sucking fluid, and a discharge port 22 for discharging a sucked fluid And an impeller 30 installed in the lower case 20 and coupled to the rotating shaft of the motor 10 and rotated.

The motor 10 is integrally coupled to the lower case 20, and is essentially provided with the impeller 30 and the pump.

The motor 10 is coupled to the lower case 20 so that the rotary shaft 11 is vertically protruded downward so that the impeller 30 can be axially coupled to the rotary shaft 11 .

The impeller 30 is coupled to the rotating shaft 11 of the motor 10 and is rotatable. The impeller 30 includes a base plate 31, a vane 32, and an impeller boss 33 And the like.

Referring to FIG. 1, the base plate 31 has a circular shape, and the vane 32 may be integrally formed so as to protrude vertically from one surface of the base plate 31.

In an embodiment of the present invention, the number of the vanes 32 of the impeller 30 may be two.

The vane 32 is provided with two helical vanes so that two space portions S1 and S2 are formed as shown in FIG. 1, and the space portions S1 and S2 are connected to the impeller bosses 33, respectively.

In general, the impeller trims to match the duty point. Mono-vane impeller, which is a single vane, is often difficult to manufacture due to the fact that the balance is broken when trimmed. In contrast, The ability to pass through the foreign substance is advantageous.

Accordingly, the impeller 30 according to the present invention has the above-described two-vane structure, and the space through which the foreign matter passes is narrower than the monovane. However, the insert ring 40 and the gap adjusting means 50 The gap of the impeller gap between the impeller 30 and the insert ring 40 can be variably controlled through the structure.

The impeller boss 33 protrudes from the center of the base plate 31 and is coupled to the rotary shaft 11 in a spline gear.

Accordingly, the rotary shaft 11 of the motor 10 is formed as a spline shaft having a spline groove 11a formed along the outer peripheral surface thereof.

2, the vane 32 is integrally formed on the outer peripheral surface of the impeller boss 33 with the impeller boss 33 as a spiral center.

In the meantime, the impeller gap variable type submerged motor pump 1 according to the embodiment of the present invention is disposed between the suction port 21 of the lower case 20 and the impeller 30, And an insert ring to be installed.

It is preferable that the insert ring 40 is formed with an inner hollow 41 through which the fluid passes and an outer diameter of the insert ring 40 is formed larger than the suction opening 21 so as to be seated in the inner space of the lower case 20.

2, the lower case 20 is formed with a seating part 23 having a diameter larger than the inner diameter of the suction port 21 inside the suction port 21, and the insert ring 40 And can be stably supported on the seat part (23).

In addition, the impeller gap variable type submerged motor pump 1 of the present invention through the insert ring 40 configured as described above is characterized in that it is easy to treat the particulate fibrous foreign matter. For this purpose, in one embodiment of the present invention, The insert ring (40) is installed vertically movably up and down at the seat (23) of the lower case (20).

Accordingly, the impeller gap variable type submerged motor pump 1 according to the embodiment of the present invention further comprises the gap adjusting means 50 in which the insert ring 40 is operable to move up and down.

2, the vane 32 of the impeller 30 is connected to the upper end of the insert ring 40 in a state where the impeller 30 is coupled to the motor 10, And an impeller gap G spaced a predetermined distance is formed.

This is because it is preferable that the impeller gap G is formed so that the vane 32 of the impeller 30 may be interfered with the insert ring 40 during rotation so that a gap of about 1 mm is generated.

The impeller gap variable type submerged motor pump 1 according to the embodiment of the present invention is manufactured by a stainless steel precision casting method in order to improve the corrosion resistance and the durability of the impeller 30 and the insert ring 40 .

Referring to FIG. 3, when a fibrous foreign matter such as a wet tissue is clogged once between the impeller gaps G, foreign matter of a similar volume is continuously overlaid and adhered to each other.

Therefore, since the impurities adhering to the periphery of the impeller have a great influence on the performance of the pump, it is troublesome to lift the installed pump and remove it frequently. In the worst case, the impeller or the motor is damaged, This has caused a problem to be replaced.

Accordingly, in order to solve such a problem, the impeller gap variable type submersible motor pump 1 of the present invention is configured such that the insert ring 40 flows up and down in the lower case 20 and the gap of the impeller gap G is varied .

In addition, in an embodiment of the present invention, the interval between the impeller gaps G is variably controlled through the gap adjusting means 50. [

The gap adjusting means 50 may be formed by the water pressure generated around the space portions S1 and S2 when the impeller 30 is rotated in the lower case 20, And serves to allow the impeller 30 to move up and down.

The gap adjusting means 50 includes a first elastic member 51 elastically biased upwardly of the insert ring 40 and a second elastic member 51 elastically biased downwardly of the impeller 30, (52).

2, an upper end of the first elastic member 51 is elastically supported on the insert ring 40 in a state in which the lower end of the first elastic member 51 is supported on the seating portion 23 of the lower case 20, The lower end or the upper end of the first elastic member 51 may be integrally and rigidly fixed to the seating part 23 or the insert ring 40.

Accordingly, when the water pressure of the insert ring 40 is large enough to overcome the elastic limit of the first elastic member 51 during the rotation of the impeller 30, So that it can flow up and down by a predetermined height.

That is, the first elastic member 51 contracts or expands and moves the insert ring 40 up and down.

At this time, the insert ring 40 is formed with an annular stopping protrusion 42 protruding downward so as to be inserted into the inner circumferential surface of the suction port 21 when the insert ring 40 is lowered.

When the first elastic member 51 is compressed by the water pressure corresponding to the rotation of the impeller 30, the insert ring 40 stably moves along the inner surface of the suction port 21 So that the first elastic member 51 can be guided and supported so that the first elastic member 51 is not released to the inside.

Referring to FIG. 4, the insert ring 40 has a tapered surface 43 formed along the upper end of the hollow 41 to form a predetermined sloped surface.

The tapered surface 43 is configured such that the water pressure acting around the space S1 and S2 by the rotation of the impeller 30 can act on the insert ring 40 to a great extent. The first elastic member 51 can be compressed and lowered by the water pressure acting downward on the tapered surface 43. [

Therefore, when the foreign matter introduced into the impeller 30 together with the fluid adheres to the periphery of the impeller gap G, the interval of the impeller gap G temporarily increases due to the descent of the insert ring 40 So that various foreign substances can easily escape to the discharge port (22) of the lower case (20).

At this time, the insert ring 40 has a spiral rib 43a formed on the inner circumferential surface, that is, along the tapered surface 43. The insert ring 40 has various kinds of foreign substances introduced into the impeller gap G through the rib 43a, Can be easily removed.

Meanwhile, in an embodiment of the present invention, the impeller 30 may be elastically biased downward through the second elastic member 52.

Referring to FIG. 3, the second elastic member 52 may be inserted and supported at the upper end of the impeller 30 so as to surround the impeller boss 33.

Therefore, the second elastic member 52 is elastically supported so as to press the impeller 30 downward, and a foreign matter such as a wet tissue is applied to the impeller 30 and the insert ring 40, that is, the impeller gap G The impeller gap G is gradually expanded in a direction opposite to the direction of the first elastic member 51 so that the impeller gap G is gradually expanded. When the rings 40 flow in opposite directions to each other, some of the impurities adhering to the impeller gap G around the impeller gap G escape to the discharge port 22, and the remaining impurities are also discharged through the expanded space You will be able to escape naturally.

The underwater motor pump having the impeller gap variable insert ring described above and shown in the drawings is only one embodiment for carrying out the present invention and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the following claims, and the embodiments improved and changed without departing from the gist of the present invention are obvious to those having ordinary skill in the art to which the present invention belongs It will be understood that the invention is not limited thereto.

10 Motor
11 Rotary shaft
11a Spline groove
20 Lower case
21 Inlet
22 outlet
30 impeller
31 base plate
32 vane
33 Impeller Boss
34a axial hole
40 insert ring
41 hollow
42 jaws
43 Tapered surface
50 interval adjusting means
51 first elastic member
52 second elastic member

Claims (4)

A motor; A lower case having a suction port for sucking the fluid and a discharge port for discharging the sucked fluid; An impeller installed inside the lower case and coupled to the rotation shaft of the motor and rotated; In the submersible motor pump,
The impeller includes a circular base plate and a vane protruding in a vertical direction from one surface of the base plate,
An insert ring having a hollow formed therein and having an outer diameter larger than that of the suction port and installed inside the lower case so as to be positioned between the suction port and the impeller; Further included,
Wherein the impeller gap variable type insert ring is provided in the lower case with variable spacing between the vane end portion of the impeller and the insert ring by the water pressure generated by the rotation of the impeller. Underwater pump. The method according to claim 1,
And the gap adjusting means includes a first elastic member for elastically biasing the insert ring upward to raise or lower the insert ring in accordance with the magnitude of the water pressure acting between the impeller and the insert ring Wherein the impeller gap-variable insert ring is formed by a plurality of grooves. The method according to claim 1,
The impeller further includes an impeller boss protruding from the center of the base plate and coupled to the rotating shaft and the spline gear,
Wherein the gap adjusting means includes a second elastic member for elastically biasing the impeller downward so that the impeller flows upward and downward in accordance with a magnitude of water pressure acting between the impeller and the insert ring. An underwater motor pump with a gap-variable insert ring. 4. The method according to any one of claims 1 to 3,
Wherein the insert ring is formed with an annular stopping protrusion protruding downward to be inserted into the inner circumferential surface of the suction port when the insert ring is lowered.

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