KR20200108579A - Submergible Motor Pump that Allows for Adjustment of Clearance - Google Patents

Abstract

The present invention relates to a submersible pump with adjustable clearance. The submersible pump with adjustable clearance secures both the convenience and stability by adjusting a minimum clearance or a separation clearance between a rotor and a suction cover and fixing the suction cover with bolts. Also, the submersible pump with adjustable clearance according to the present invention includes a casing installed in the water in a vertical direction to provide a suction port and a discharge port.

Description

Submergible Motor Pump that Allows for Adjustment of Clearance

The present invention relates to a submersible pump installed in the water of a water purification plant, a wastewater treatment plant, a basement concerned with flooding, and a fish farm for storing a large amount of water and used to discharge water to the outside. In particular, the present invention relates to a submersible pump capable of adjusting the gap so that the gap between the rotation difference and the suction cover can be minimized and the gap gap is adjusted, as well as the fixing of the suction cover can be easily performed with a plurality of adjustment bolts.

In general, it is a well-known fact that a submersible pump is installed for the purpose of discharging water to the outside in places such as water purification plants, wastewater treatment plants, and basements where flooding is expected.

There are several types of such submersible pumps, such as a submersible submersible pump, an elevating submersible pump, or a ground-mounted type, but the submersible pump to be described in the present invention is a submersible submersible pump. Examples of this submersible pump are disclosed in the following patent documents.

Patent Document 1 relates to a'submersible pump impeller suction cover gap adjustment device', and'a drive shaft rotated by a motor, an impeller mounted to the drive shaft, a suction cover mounted adjacent to an end of the impeller, and the suction A submersible pump consisting of a casing supporting the cover is provided. The suction cover is configured to be fastened with the casing by a thread. According to this configuration, as the suction cover having a threaded thread is rotated, an effect of simply adjusting the gap occurs in the field.

Patent Literature 2 is related to'a water pump impeller-to-housing clearance adjustment device that allows an engine mechanic to arbitrarily adjust the clearance between the impeller and the housing in order to improve the pumping efficiency of the water pump installed in the engine'. In a water pump in which a shaft receiving part of an impeller is coupled in the middle of a rotating shaft housed inside a housing, and a predetermined gap is provided between the impeller and the inner wall of the housing, the gap between the impeller and the inner wall of the housing can be adjusted. A gap adjusting plate formed in an annular shape in the middle of an inner wall of the housing facing the impeller; One end is coupled by a pivot in the middle of the outer surface of the clearance adjusting plate so that the clearance adjusting plate can be moved forward and backward, and the outer end thereof is formed to be exposed to the outside of the housing while the middle is screwed in the middle of the housing. It is characterized by'is disclosed.

Patent Document 3 says that it relates to'a device for adjusting the wear ring spacing of a pump whose structure has been improved so that it can be easily adjusted to easily adjust the gap while being applicable to the wearing parts of various pumps with different structures.' And a casing provided with a rotating body that rotates interlockingly according to the rotational drive of, and the rotating body is disposed therein, a wear ring is disposed outside the rotating body, and is provided with a suction port for sucking a fluid and a discharge port for discharging the sucked fluid, It is disclosed that a female thread is formed on the inner circumferential surface of the wear ring, and is fastened to the female thread of the wear ring, and is composed of a gap adjusting device in which a male thread is formed on the outer circumferential surface so as to move forward and backward according to the screw fastening operation.

However, among the prior art, Patent Document 1 is configured so that the adjustment of the gap between the rotation difference (or impeller) and the suction cover can be performed by a thread directly installed on the suction cover fixed to the casing by a fixing bolt.

For this reason, when adjusting the gap between the rotation difference (or impeller) and the suction cover, after dismantling the fixing bolts connected to the casing, the workers rotate the suction cover itself to adjust the gap between the rotation difference (or impeller) and the suction cover. After that, there is a problem that causes a lot of inconvenience and hassle to the operator when adjusting the gap, such as having to fix the suction cover again with a fixing bolt. This problem is also contained in Patent Document 3 as it is.

On the other hand, in the case of Patent Document 2, in order to allow the operator to arbitrarily adjust (cut) the gap between the impeller and the housing to improve efficiency, it is configured to execute only the adjustment screw, but the prior art disclosed in Patent Document 2 is only adjusted. Since it is a configuration that allows adjustment of the gap between the impeller and the housing as well as fixing the housing with only a screw, there is a risk of weakening the coupling force of the adjusting screw. In particular, the head is installed to prevent separation of the adjusting screw when using the adjusting screw. After removing the head of the adjusting screw, which was connected to the slot, the head of the adjusting screw must be adjusted, and after adjusting the gap, the head of the adjusting screw must be again fixed to the head. There is a hassle and inconvenience such as having to be combined with a slot).

Accordingly, there is an urgent need to develop a submersible pump that allows anyone to easily adjust the distance and minimize the gap between the rotation difference and the suction cover while maintaining the suction cover at all times.

KR Patent Registration No. 10-1397629 KR Patent Registration No. 10-0974500 KR Patent Publication No. 10-2016-0002114

The present invention was developed to supplement the problems of the prior art and provide various additional advantages, and both the adjustment bolts to minimize the gap between the rotation difference and the suction cover or maintain the separation and fix the suction cover. It is to provide a submersible pump with adjustable clearance that has the convenience and stability that enable it.

An object of the present invention is to provide a submersible pump capable of adjusting a gap between a suction cover and a casing to enhance airtightness.

The above object is achieved by a submersible pump with adjustable clearance provided according to the invention.

The submersible pump with adjustable gap provided according to an aspect of the present invention includes a rotation difference for discharging water sucked from the suction port through a discharge port by being axially supported to be rotated on a suction port side of a casing installed underwater, and a suction port of the casing. In the submersible pump having a suction cover installed to face the rotation difference on the side to prevent pressure loss, the gap between the rotation difference and the suction cover is minimized or separated by being screwed only on the casing side through the suction cover A clearance adjusting means for adjusting the lifting efficiency to be adjusted so as to be able to adjust the lifting efficiency and maintaining the suction cover fixed to the casing; And screwing through the suction cover at a position spaced apart from the clearance adjusting means, but being screwed to move in only one direction, and adjusting the suction cover apart from the rotation difference according to whether the clearance adjustment means is loosened or And a spacing adjustment means for separating from the casing.

In one embodiment, the clearance adjusting means is provided with through holes installed at a predetermined distance in the circumferential direction of the suction cover and facing each other, and screw holes formed corresponding to the through holes on the bottom side of the casing. And, after loosely penetrating the through holes, each screw is coupled only to the screw hole of the casing, and is a plurality of gap adjusting bolts capable of adjusting tightening or loosening from the screw holes,

The spacing adjustment means includes screw holes provided to penetrate the suction cover at opposite positions between the through holes of the suction cover, and a right-hand spiral portion is screwed to the screw holes so that the front end portion of the casing is rotated. While supported by the suction cover is a plurality of spaced adjustment bolts to be moved along the spiral portion in the right direction.

In another embodiment, an O-ring for maintaining airtightness is installed along the entire circumference of the coupling side portion of the casing and the suction cover.

According to the present invention, it provides the effect of allowing anyone to easily adjust the maintenance of the minimum clearance or distance between the rotation difference and the suction cover to arbitrarily adjust the lift efficiency.Even when adjusting the clearance, the suction cover remains in its original fixed state. Gives an effect that allows it to be maintained.

The present invention also provides the effect of maintaining airtightness to prevent pressure leakage by means of an O-ring installed between the suction cover and the casing even when the suction cover moves when adjusting the gap between the rotation difference and the suction cover.

1 is a cross-sectional view of a submersible pump with adjustable gap according to the present invention,
2 is a cross-sectional view taken along line II of FIG. 1,
3A and 3B are views each showing a state of adjusting a gap between a rotation difference and a suction cover and maintaining a gap in the submersible pump shown in FIG. 1.

Hereinafter, a more preferred embodiment of the submersible pump capable of adjusting the gap according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention will be described in detail in the detailed description of the bar, specific embodiments that can be made various changes and can have various embodiments.

However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In addition, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted. In addition, terms to be described later are terms defined in consideration of functions in the present invention, and since these may vary according to the intention or custom of users or operators, the definition should be made based on the contents throughout the present specification describing the present invention. .

1 is a cross-sectional view of a submersible pump with adjustable clearance according to the present invention, and is a cross-sectional view taken along the line A-A of FIG. 2. 2 is a cross-sectional view taken along the line I-I of FIG. 1.

As shown in the figure, the submersible pump 100 with adjustable clearance according to the present invention includes a casing 102 that is vertically installed in the water and provides a suction port 102-1 and a discharge port 102-2. A rotation car 104 is located toward the suction port 102-1 of the casing 102, and the rotation car 104 is coupled to a rotation shaft 101 installed to be rotated inside the casing 102 While rotating along with the rotation shaft 101, a discharge pressure is generated to discharge water sucked from the suction port 102-1 through the discharge port 102-2.

To the suction port 102-1 side of the casing 102, a disk-shaped suction cover 105 is installed to provide a water suction hole 105-1 in contact with the rotating vehicle 104, and the suction cover To the lower side of 105, harmful substances that may weaken or reduce the suction power of the rotating vehicle 104 are introduced into the rotating vehicle 102 through the suction hole 105-1 of the suction cover 105. A basket-shaped strainer 107 having countless filtering holes 107-1 that serves to filter the material in advance is detachably coupled from the casing 102 by a fixing bolt 107-2, and the casing ( A drive motor (M) that drives the rotation shaft (101) and a frame (103) that safely protects other components are installed above the 102).

Such a submersible pump is provided with a clearance adjustment means (112a) and a separation adjustment means (114a) which are the core components of the present invention.

The gap adjusting means (112a) is screwed only on the bottom side of the casing (102) as seen in FIG. 1 through the disk-shaped suction cover (105), the rotation difference (104) and the suction cover (105) It is possible to adjust the lift efficiency by adjusting the gap (d) between the two to be minimal or spaced apart, and in addition to this, it is possible to maintain the suction cover 105 in a coupled state to the casing 102.

The gap adjusting means (112a), as shown in Figure 2, the through-holes (112-1) and the casing installed opposite to each other at a predetermined distance along the circumferential direction of the disk-shaped suction cover (105). In 102, the through-holes 112-1 and the correspondingly installed screw holes 112-2 are provided, and the casing is loosely coupled while passing through the through-holes 112-1, respectively. These are the gap adjustment bolts 112 formed with a spiral 112-4 only at the tip of the screw hole 112-2 installed in 102) so as to be coupled in a solid fixed state as well as fine movement adjustment. As shown in FIG. 2, since all of the clearance adjustment bolts 112 are the same, only one is described as an example in this embodiment.

The spacing adjustment means 114a is also screwed through the suction cover 105 at a position spaced apart from the gap adjusting means 112a, as shown in FIG. 2, but in one direction, that is, as shown in FIG. It is screwed to move only in the (down) direction to separate the suction cover 105 from the rotational car 104 or completely separate from the casing 102 depending on whether or not the clearance adjusting means 112a is loosened. Make it possible.

The separation adjustment means (114a), as shown in Figure 2, installed to penetrate the suction cover 105 at the opposite position between the through holes (112-1) of the suction cover (105). It is provided with a hole (114-1), a plurality of separation adjustment bolts 114 having a left-hand spiral portion (114-2) screwed to the screw holes (114-1).

Accordingly, when the separation adjustment bolt 114 is rotated, the separation adjustment bolt 114 achieves a state in which the front end thereof is supported and rotated toward the bottom of the casing 102 as shown in FIG. The suction cover 105 coupled to the separation adjustment bolt 114 through the screw holes 114-1 is a helical portion in any one direction of the separation adjustment bolt 114, that is, a right helical portion 114-2 As it moves downward along the line, it may be separated from the rotational vehicle 104 or completely separated from the casing 102.

The separation and separation of the suction cover 105 by the separation adjustment bolt 114 is performed by using the clearance adjustment bolts 112, which are the clearance adjustment means 112a, through a screw hole 112-2 of the casing 102. It can be released from and separated by a predetermined distance, or can proceed in a completely separated state. The separation adjustment bolts 114 are also the same, and thus only one has been described as an example.

An airtight O-ring 120 was installed along the entire circumference of the coupling side portion of the casing 102 and the suction cover 105 in the form of a disk.

The reason for the installation of the O-ring 120 for maintaining the airtightness is the minimum clearance (d) between the rotation difference 104 and the suction cover 105 by the clearance adjustment bolts 112 or the separation adjustment bolts 114 ) Even if the suction cover 105 is moved up and down during adjustment, the airtight O-ring 120 is deformed at the coupling side portion of the casing 102 and the suction cover 105 while maintaining the airtightness. Thus, it is to minimize the pressure loss that reduces the lift effect of the submersible pump.

3A and 3B are views showing adjustments for maintaining a minimum clearance between a rotation difference and a suction cover in the submersible pump shown in FIG. 1 and adjustments for clearance separation. With reference to these drawings, a minimum clearance maintenance adjustment and clearance clearance adjustment operation between the rotation difference 104 and the suction cover 105 will be described.

<The minimum clearance adjustment and maintenance of the fixed state between the rotation difference 104 and the suction cover 105 by the clearance adjustment bolt 112 which is the clearance adjustment means 112a>

As shown in FIG. 3A, the reason for adjusting to be maintained at a minimum clearance (d) between the rotation difference 104 and the suction cover 105 is to minimize the suction pressure loss of the rotation difference 104 to maximize the head ( It is to increase the efficiency of the pump by deriving the 揚程).

For this reason, the present invention adjusts the maintenance of the minimum clearance (d) between the rotational vehicle 104 and the suction cover 105, through a spiral 112-4 in the screw hole 112-2 of the casing 102 By only rotating the plurality of screwed gap adjustment bolts 112, the gap adjustment bolt 112 is helically moved upward from the screw hole 112-2. The suction cover 105, which is loosely coupled and supported through the through hole 112-1, is adjusted to maintain the optimal minimum clearance (d) adjacent to the rotation difference 104 as shown in FIG. 3A. Thus, the maximum head can be derived from the pump.

Even in the case of adjusting the minimum clearance (d) between the rotation difference 104 and the suction cover 105 by the clearance adjustment bolt 112, the clearance adjustment bolt 112 is a screw hole of the casing 102 ( 112-2), so that the suction cover 105 remains coupled to the clearance adjustment bolt 112 so that the casing 102, like the clearance adjustment bolt 112, is The original state fixed to the screw hole 112-2 is maintained as it is.

When adjusting the minimum clearance (d) between the rotation difference 104 and the suction cover 105 by the rotation operation of the clearance adjustment bolts 112, the separation adjustment bolt 114 is only the suction cover 105 Since it is screwed to the configuration so that it can move freely like the suction cover 105, it does not interfere with the maintenance of the minimum clearance (d) between the rotational vehicle 104 and the suction cover 105.

<Maintaining the separation between the rotation difference 104 and the suction cover 105 by the separation adjustment bolt 114, which is the separation adjustment means 114a>

In the present invention, as shown in FIG. 3B, when it is desired to separate the set minimum clearance (d) between the rotation difference 104 and the suction cover 105, for example, when the pump lift is too high, it is to be adjusted to relieve it. , The separation adjustment bolts 114 may be spaced apart from the minimum gap (d) between the rotation difference 104 and the suction cover 105 to be further apart. When adjusting the separation of the suction cover 105 from the rotational difference 104 by the separation adjustment bolt 114, as shown in Figure 3b, the gap adjustment bolts 112 of the casing 102 It must be released from the screw hole 112-2 and separated from the suction cover 105.

In general, since the submersible pump is installed and operated in water with a very poor environment, the suction cover 105 tends to be intensified by being corroded by contaminants or various contaminants depending on the period of use. Even in a state where the bolts 112 are released from the screw hole 112-2 of the casing 102 to be separated from the suction cover 105, the suction cover 105 is removed from the casing 102 by its own weight. It remains connected to the casing 102 as it is as shown in FIG. 3B without moving downward. In this case, it is necessary to apply a force to move the suction cover 105 by the separation adjustment bolt 114.

Unlike the clearance adjustment bolt 112, the separation adjustment bolts 114 are screwed to the screw holes 114-1 of the suction cover 105 through a right-hand thread 114-2, When rotating the separation adjustment bolts 114, the separation adjustment bolts 114 rotate in a state where the tip end portion is supported by the casing 102, and the right (in any one direction of the separation adjustment bolts 114)右) Since the suction cover 105 coupled to the spiral portion 114-2 is moved downward while riding the right spiral portion 114-2, the suction cover coupled in close contact with the casing 102 ( 105) is a state in which the casing 102 is pushed up and separated from the casing 102 by a distance d'from the rotational car 104, so that the suction cover 105 is shown in FIG. 3A. As described above, the gap adjustment bolts 112 are supported.

In the above embodiment, the case where the suction cover 105 is separated from the rotating vehicle 104 has been described, but even when the suction cover 105 is completely separated from the casing 102 for maintenance, the separation as described above It will be fully understood that it can be executed by the manipulation of the adjustment bolts 114.

Even when the separation is adjusted by the gap d'between the rotation difference 104 and the suction cover 105 by the rotation operation of the separation adjustment bolts 114, the suction cover 105 is the gap adjustment bolt 112 ), you can keep it bound to it.

In the above embodiment, it is possible to check whether the minimum gap (d) between the rotational difference 104 and the suction cover 105 is maintained with a gap measurement gauge (not shown), and the gap measurement by the gap measurement gauge is the suction cover. It can be done through the suction hole (105-1) of (105).

When the clearance adjustment bolts 112 or the clearance adjustment bolts 114 are operated to minimize or adjust the clearance between the rotating vehicle 104 and the suction cover 105, the suction cover 105 ) To protect the basket-shaped strainer 107, which is fixed by combining with a fixing bolt 107-2, by releasing the fixing bolt 107-2, and can be executed with the lower part of the casing 102 completely open. have.

The present invention provides an advantage that can be applied to all submersible pumps.

100: submersible pump with adjustable gap
102: casing
104: rotating car
105: suction cover
112a: gap adjusting means
112: gap adjustment bolt
114a: separation adjustment means
114: separation adjustment bolt
d,d': gap between suction cover and rotating vehicle
120: O-ring for confidentiality

Claims (3)

A rotational difference that is pivotally supported on the inlet side of the casing installed in the water to discharge water sucked from the inlet through the discharge port, and a suction that is installed facing the rotational difference on the inlet side of the casing to prevent pressure loss In the submersible pump having a cover,
It penetrates through the suction cover and is screwed only on the casing side, so that the clearance between the rotation difference and the suction cover is adjusted to be at least or spaced apart to adjust the lifting efficiency, and the suction cover is kept fixed to the casing. A gap adjustment means to enable it; And
The suction cover is screwed to penetrate the suction cover at a position spaced apart from the clearance adjustment means, but is screwed so as to move in only one direction, so that the suction cover is spaced apart from the rotation difference according to whether the clearance adjustment means is loosened or adjusted. Gap adjustable submersible pump comprising a; separation adjustment means for separating from the casing. The method of claim 1,
The gap adjusting means includes through-holes installed at a predetermined distance in the circumferential direction of the suction cover and facing each other and screw holes formed corresponding to the through-holes on the bottom side of the casing, and the through-hole It is a plurality of gap adjustment bolts that are screwed only to the threaded holes of the casing after loosely penetrating the holes to enable tightening or loosening adjustments from the threaded holes,
The spacing adjustment means includes screw holes installed to penetrate the suction cover at opposite positions between the through holes of the suction cover, and a right helical part is screwed to the screw holes so that the tip of the suction cover is rotated. Gap adjustable submersible pump, characterized in that it is supported by the casing and the suction cover is a plurality of separation adjustment bolts moving along the right helix. The method of claim 2,
A gap-adjustable submersible pump, characterized in that an airtight O-ring is installed along the entire circumference of the coupling side portion of the casing and the suction cover.

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