KR102167981B1 - A mixed flow pump - Google Patents

Abstract

The present invention relates to a mixed flow pump having a current casing for preventing blockage by foreign substances, which can discharge a fluid without blockage even when foreign substances are mixed with the fluid. According to an embodiment of the present invention, the mixed flow pump having the current casing for preventing blockage by foreign substances is installed on a column pipe for discharging a fluid from a water storage tank. The mixed flow pump includes: a mixed flow impeller accelerating the fluid in a direction of a rotation shaft with centrifugal force to suck and discharge the fluid; a driving motor driving the mixed flow impeller; and a current casing supported on an inner circumference of the column pipe, surrounding a circumferential portion of the mixed flow impeller through which the fluid is discharged, and having a rotation channel through which the fluid is discharged while rotated along a circumference so that the fluid discharged from the mixed flow impeller is rotated in a circumferential direction and the foreign substances are discharged without blockage. Accordingly, it is possible to prevent the efficiency of the pump from being degraded by blockage due to the foreign substances.

Description

Sand flow pump with current casing to prevent clogging of foreign matter{A MIXED FLOW PUMP}

The present invention relates to a four-flow pump having a current casing for preventing clogging of foreign matters that can be discharged without clogging even if foreign matters are mixed with a fluid.

In general, a pump is a device for transporting fluid, and the pump is an axial pump that discharges fluid in the axial direction by acceleration force according to the type of impeller, a centrifugal pump that discharges fluid in the circumferential direction by centrifugal force, and centrifugal force and acceleration force. It is divided into a four-flow pump that discharges the fluid in the diagonal circumferential direction.

The axial flow pump is installed in the place where the head is low but the amount of discharge is large, and the centrifugal pump is installed in the place where the head is high but the amount of discharge is small, so the classification of the installation place according to the required performance is clear. It has both the intermediate performance of the pump and the axial flow pump and is widely used in general.

As an example of the four-flow pump, there is a bar disclosed as "a submersible motor pump with improved durability" in Korean Patent Publication No. 10-1899292 (announced on September 17, 2018).

The conventional underwater motor pump with improved durability rotates the impeller by the motor unit, and arranges the impeller between the inner guide casing and the outer guide casing, so that fluid flows between the inner guide casing and the outer guide casing according to the rotation of the impeller. It could be sucked and discharged.

However, in the conventional submersible motor pump with improved durability, since the inner guide casing and the outer guide casing are connected to each other by a guide vane having a plate shape, when a relatively long foreign substance is introduced, the foreign substance is at the end of the guide vane. There was a problem that the pump performance was deteriorated.

In addition, since the impeller is configured in an integrated form, the entire impeller needs to be replaced when the vanes are worn, so there is a problem in that the cost of replacement is increased.

In addition, it is difficult to adjust the distance between the vane of the impeller and the outer guide casing, and when the pump is stopped, the fluid remaining in the column pipe flows back as it is, causing damage to the submersible motor pump by water impact. there was.

The present invention was conceived to solve the above problems, and the problem to be solved by the present invention is that it is possible to prevent the efficiency of the pump from being deteriorated due to foreign matters jammed in the guide vane, as well as the impeller being separable. Therefore, by separating and replacing only a part of the impeller, the replacement cost can be reduced, and the efficiency of the pump is improved by adjusting the gap between the vane of the impeller and the outer guide casing, and clogging of foreign substances that can prevent damage due to reverse flow. It is an object of the present invention to provide a four-flow pump having a current casing to prevent this.

The screw flow pump having a current casing to prevent clogging of foreign substances according to an embodiment of the present invention to achieve the above object is a screw flow having a current casing to prevent clogging of foreign substances installed in a column pipe for discharging fluid from a storage tank. In a pump, a four-flow impeller that sucks and discharges fluid by accelerating a fluid in a direction of a rotation axis with a centrifugal force, a driving motor that drives the four-flow impeller, and a drive motor that drives the four-flow impeller, and is supported on the inner circumference of the column pipe, and the fluid is discharged from the four-flow impeller And a current casing formed with a rotation channel that surrounds the circumferential portion and discharges the fluid while rotating the circumference so that the fluid discharged from the four-flow impeller is rotated in a circumferential direction to discharge foreign matter without clogging.

The rotation channel is formed in a shape that gradually increases in diameter from the circumference of the screw flow impeller toward the outer side in the radial direction, and passes through the end of the rotation channel so that the fluid rotating through the rotation channel is discharged to the upper side of the current casing. It may include a channel discharge port formed.

It may include a reverse water blocking door installed at the channel discharge port to open the channel discharge port by the hydraulic pressure discharged by the screw flow impeller, and close the channel discharge port when the hydraulic pressure disappears to prevent an impact caused by reverse water.

A guide vane that surrounds the circumference of the screw flow impeller and generates a suction force of the fluid according to the rotation of the screw flow impeller, a suction port through which the fluid is sucked is formed, and a guide vane that guides the movement of the fluid sucked through the suction port is radially under the suction port. It may include a plurality of guide casing is formed.

The four-flow impeller is a shaft coupling plate coupled to the drive shaft of the drive motor, an impeller body coupled to the shaft coupling plate and having an impeller vane, and inserted between the shaft coupling plate and the impeller body to be inserted between the impeller vane and the guide It may include a simple rate that adjusts the spacing between the casings.

According to the present invention, it is possible to prevent the efficiency of the pump from deteriorating due to foreign substances caught in the discharge guide vane by installing the current casing through which the fluid rotates and discharges.

In addition, it is possible to reduce the replacement cost by replacing only part of the shaft when the screw flow impeller is replaced due to wear or failure by configuring the shaft coupling plate coupled to the drive shaft and the impeller body on which the impeller vanes are formed to be coupled to each other.

In addition, a simple rate is installed between the shaft coupling plate and the impeller body to adjust the gap between the impeller vanes of the guide casing, thereby improving the efficiency of the pump.

In addition, a reverse water shut-off door can be installed to prevent damage due to reverse water impact.

1 is a side cross-sectional view showing a four-flow pump having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention.
2 is a perspective view schematically showing a current casing constituting a four-flow pump having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention.
3 is a cross-sectional view schematically showing a current casing constituting a four-flow pump having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention, as viewed from the bottom.
4 is a side cross-sectional view showing a state in which a gap between a guide casing and an impeller vane of a four-flow pump having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention is adjusted.
5 is a side cross-sectional view schematically showing an operating state of a reverse water shut-off door of a four-flow pump having a current casing to prevent clogging of foreign substances according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

Although the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention is shown as being an underwater jet-flow pump 100 in which the driving motor 110 is located in the column pipe 200, The drive motor 110 may be implemented as a land-use jet pump located outside the reservoir.

As shown in Figure 1, the four-flow pump 100 having a current casing to prevent clogging of foreign matter according to an embodiment of the present invention is installed in the column pipe 200 installed to transfer the fluid to the outside from the reservoir. The fluid stored in the water storage tank may be discharged to the outside through the column pipe 200.

As shown in FIG. 1, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention may include a driving motor 110.

The drive motor 110 may provide power for rotating the four-flow impeller 120 to be described below, and the drive motor 110 may be located outside the reservoir or inside the reservoir.

The drive motor 110 may be implemented as an electric motor in which the drive shaft 111 rotates by electricity, or may be implemented as an internal combustion or an external combustion engine in which the drive shaft 111 rotates by fossil fuel.

The driving motor 110 may be wrapped in a pump casing and protected from fluid stored in the storage tank.

As shown in FIGS. 1, 4, and 5, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention may include a four-flow impeller 120.

The four-flow impeller 120 may suck and discharge fluid by an acceleration force and a centrifugal force that moves the fluid in the axial direction as it rotates.

The four-flow impeller 120 may suck the fluid in the axial direction and discharge the sucked fluid in the upper diagonal direction.

The four-flow impeller 120 may include a shaft coupling plate 125, an impeller body 121, and a simple rate 127.

The shaft coupling plate 125 may couple the screw flow impeller 120 to the drive shaft 111 of the drive motor 110. The shaft coupling plate 125 may be formed in a disk shape, and a shaft boss to which the drive shaft 111 is coupled is formed in the center of the shaft coupling plate 125 so that the drive shaft 111 is inserted into the shaft boss to fasten a nut. The four-flow impeller 120 may be coupled to the drive shaft 111.

The impeller body 121 is formed in a shape of a cone that becomes wider toward the top, and a plurality of impeller vanes 123 may be radially formed around the impeller body 121.

In the embodiment, the impeller body 121 is described as being a general four-flow impeller 120 in which a plurality of impeller vanes 123 are formed, but the four-flow impeller 120 has one impeller vane 123 in the form of a screw impeller body 121 ) May be implemented with a screw impeller.

Here, when the screw impeller 120 is implemented as a screw impeller, when a fluid is sucked, clogging of foreign matter can be prevented.

On the other hand, the impeller body 121 may be formed in an open upper portion, and the open upper portion of the impeller body 121 is coupled to the shaft coupling plate 125 to couple the impeller body 121 to the drive shaft 111 At the same time, it is possible to seal the open upper part of the impeller body 121.

The shaft coupling plate 125 may be coupled to the impeller body 121 in a form that is fastened by a bolt, and the body coupling bolt 129 is attached to the impeller body 121 while the impeller body 121 is coupled to the shaft coupling plate 125. In the form of screwing to the drive shaft 111 through the lower end of the body 121, it is double-fastened by the bolt of the shaft coupling plate 125 and the body tightening bolt 129 to drive the screw current impeller 120 to the drive shaft 111 Can stably bind to.

Here, by configuring the shaft coupling plate 125 and the impeller body 121 to mutually couple, there is an advantage in that the replacement cost is low because only the impeller body 121 can be separated and replaced when the impeller vane 123 is worn.

The four-flow impeller 120 may include a simplate 127.

As shown in Figure 4, the simple rate 127 is installed between the shaft coupling plate 125 and the impeller body 121 to adjust the height of the impeller body 121 coupled to the shaft coupling plate 125 It is possible to adjust the distance (w) between the guide casing 140 and the impeller vane 123, which will be described below in form.

The simprate 127 is formed in the shape of a ring plate so as to have a preset thickness t, and a plurality of simplates 127 may be overlapped and installed according to an interval w for adjustment.

As shown in FIGS. 1 to 3, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention may include a current casing 130.

The current casing 130 wraps around the discharged circumference of the four-flow impeller 120 and rotates the fluid discharged through the four-flow impeller 120 in the circumferential direction and guides the movement of the discharged fluid to be discharged to prevent clogging by foreign substances. Can be prevented.

For example, in a general screw flow pump 100, a discharge guide vane for guiding the movement of the fluid is formed at a portion where the fluid is discharged by the screw flow impeller 120, and the discharge guide vane is a vertically erected type and is arranged radially. Therefore, there is a problem in that foreign matters are caught by the discharge guide vanes, and thus the four-flow impeller 120 is damaged, or the foreign matters are caught by the discharge guide vanes due to reverse flow due to stop of the start and the pump efficiency decreases.

However, since the current casing 130 guides the movement of the fluid so that the fluid is discharged by rotating the fluid in the circumferential direction of the four-flow impeller 120, it does not have a structure of an erected discharge guide vane. It can be discharged with foreign substances.

The current casing 130 may include a rotation channel 131.

The rotation channel 131 is formed in a shape that gradually increases in area from the circumference of the screw flow impeller 120 in the radial direction, so that the fluid discharged through the screw flow impeller 120 is guided through the rotation channel 131 in the circumferential direction. The fluid can be discharged after increasing the centrifugal force by rotating.

A plurality of rotation channels 131 may be formed around the current casing 130, and the upper surface of the end having the widest area of the rotation channel 131 has a fluid flow to the column pipe 200 in a state in which the centrifugal force is most increased. A channel discharge port 133 through which is discharged may be formed.

Further, the inner periphery of the rotation channel 131 is formed to have a curved surface, so that the resistance when the fluid discharged through the four-flow impeller 120 passes through the rotation channel 131 may be reduced, thereby improving pump efficiency.

In the embodiment, two rotation channels 131 are formed to provide sufficient rotational centrifugal force of the fluid, but only one may be formed, and three or more may be formed.

If the rotation channel 131 is not formed in the current casing 130, there is a concern that the pump efficiency may decrease due to turbulence while colliding to discharge the fluid through the channel discharge port 133 having a relatively small size. have.

As shown in FIGS. 2 and 5, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an exemplary embodiment of the present invention may include a reverse water blocking door 135.

The reverse water blocking door 135 is installed in the channel discharge port 133 to open the channel discharge port 133 by the pressure of the fluid discharged from the screw flow impeller 120 when the screw flow impeller 120 is started, and the four flow impeller 120 The channel discharge port 133 is sealed by the pressure of the fluid disappearing when the start of) is stopped, thereby preventing the sand flow pump 100 from being damaged by the impact of the reciprocal water remaining in the column pipe 200.

The reverse water blocking door 135 is rotatably coupled to the channel discharge port 133 and rotates by the pressure of the fluid to open and close the channel discharge port 133, or formed of a flexible material such as gusset, rubber, urethane, silicone, synthetic resin, etc. It may be installed in the channel discharge port 133 to open and close the channel discharge port 133.

As shown in FIGS. 1, 4, and 5, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention may include a guide casing 140.

The guide casing 140 may be coupled to the lower end of the current casing 130 to surround the circumference of the four-flow impeller 120 exposed from the current casing 130 to guide the movement of the sucked fluid.

The guide casing 140 may be provided with a suction port 141 through which fluid is sucked according to the rotation of the screw flow impeller 120, and a guide vane 143 that guides the movement of the sucked fluid is provided below the suction port 141. A plurality of radial can be formed.

On the other hand, the gap (w) between the guide casing 140 and the impeller vane 123 of the screw flow impeller 120 may be adjusted by the thickness (t) of the simple rate (127).

Here, since the simplate 127 is coupled between the shaft coupling plate 125 and the impeller body 121 to adjust the height of the impeller body 121, in proportion to the thickness (t) of the simplate 127 The interval w between the impeller vane 123 and the inner side of the guide casing 140 may be adjusted.

It will be described the action and effect between each of the components described above.

The four-flow pump 100 having a current casing for preventing foreign matter clogging according to an embodiment of the present invention is a guide casing by the suction force of the four-flow impeller 120 when the four-flow impeller 120 is rotated by the drive motor 110. The fluid is sucked into the suction port 141 of the guide casing 140 through the suction port 141 of the 140.

The fluid sucked through the suction port 141 is guided and sucked by the guide vane 143, and the sucked fluid flows into the current casing 130 through the four-flow impeller 120.

The fluid flowing into the current casing 130 rotates in the circumferential direction through the rotation channel 131 of the current casing 130, and the column pipe 200 through the channel discharge port 133 formed at the end of the rotation channel 131. Is discharged into the inside of the column and transferred to the outside through the column pipe (200).

Here, when a foreign substance is included in the suctioned fluid, the foreign substance rotates along the rotation channel 131 and is discharged to the column pipe 200 through the channel discharge port 133, so even if a foreign substance of a relatively long length is introduced, It can be discharged without jamming.

On the contrary, since the discharge guide vanes 143 are not formed, foreign matter contained in the residual fluid can be prevented from being jammed even if inverse water occurs.

On the other hand, when the discharge pressure by the screw flow impeller 120 acts on the current casing 130, the reverse water blocking door 135 sealing the channel discharge port 133 is opened, and when the start of the pump is stopped, the channel discharge port ( As the discharge pressure disappears in 133, the reverse water blocking door 135 seals the channel discharge port 133, and the damage to the sand flow pump 100 is caused by a water shock that occurs as the fluid remaining in the column pipe 200 flows back. It can be prevented from occurring.

In addition, when wear occurs as the impeller vane 123 adheres to the inner periphery of the guide casing 140, the impeller body 121 and the axial coupling plate 125 are inserted between the simplate 127 By adjusting the thickness (t), the interval (w) between the impeller vane 123 and the guide casing 140 may be adjusted as the interval (w) at which the maximum efficiency occurs.

Therefore, the four-flow pump 100 having a current casing for preventing clogging of foreign substances according to an embodiment of the present invention is a rotary channel 131 through which fluid is rotated and discharged by the four-flow pump 100 using the four-flow impeller 120. Since the fluid is discharged through the formed current casing 130, a relatively long foreign substance can be discharged together with the fluid without being jammed, thereby preventing damage to the pump due to the foreign substance jamming. Accordingly, it is possible to prevent a decrease in pump efficiency.

In addition, a reverse water prevention door is installed in the channel discharge port 133 to prevent damage to the sand flow pump 100 due to reverse water.

In addition, by configuring the screw flow impeller 120 in the form of coupling the shaft coupling plate 125 to the impeller body 121, it is possible to easily replace and reduce the replacement cost when the impeller vane 123 is damaged, It is possible to adjust the distance (w) between the guide casing 140 and the impeller vane 123 by installing a simple rate 127 between the coupling plate 125 and the impeller body 121.

In the above, the embodiments of the present invention have been described, but the scope of the present invention is not limited thereto, and the embodiments of the present invention are easily changed by those of ordinary skill in the technical field to which the present invention pertains and are recognized as equivalent. It includes all changes and modifications to the extent that it becomes available.

100: four-flow pump 110: drive motor
111: drive shaft 120: four-flow impeller
121: impeller body 123: impeller vane
125: shaft coupling plate 127: simple rate
130: current casing 131: rotation channel
133: channel outlet 135: reverse water blocking door
140: guide casing 141: inlet
143: guide vane 200: column pipe

Claims (5)

In the four-flow pump having a current casing to prevent clogging of foreign substances installed in a column pipe for discharging a fluid from a storage tank,
Four-flow impeller that sucks and discharges fluid by accelerating the fluid along with the centrifugal force in the direction of the rotating shaft,
A drive motor driving the four-flow impeller, and
It is supported on the inner circumference of the column pipe, surrounds the circumferential portion from which the fluid is discharged from the screw flow impeller, rotates the fluid discharged from the screw flow impeller in the circumferential direction, and discharges the fluid while rotating the circumference so that foreign substances are discharged without clogging. It includes a current casing in which a channel is formed,
The rotation channel is formed in a shape that gradually increases in diameter from the circumference of the screw flow impeller toward the outer side in the radial direction, and passes through the end of the rotation channel so that the fluid rotating through the rotation channel is discharged to the upper side of the current casing. Sand flow pump having a current casing for preventing clogging of foreign matter, characterized in that it comprises a channel discharge port formed. delete The method of claim 1,
It characterized in that it comprises a reverse water shut-off door installed at the channel discharge port to open the channel discharge port by hydraulic pressure discharged by the screw flow impeller, and to seal the channel discharge port when the hydraulic pressure disappears to prevent an impact caused by reverse water. Four-flow pump having a current casing to prevent clogging of foreign matters. The method of claim 1,
A guide vane that surrounds the circumference of the screw flow impeller and generates a suction force of the fluid according to the rotation of the screw flow impeller, a suction port through which the fluid is sucked is formed, and a guide vane that guides the movement of the fluid sucked through the suction port is radially under the A four-flow pump having a current casing for preventing clogging of foreign substances, characterized in that it comprises a guide casing formed in a plurality of. The method of claim 4,
The four-flow impeller is
Shaft coupling plate coupled to the drive shaft of the drive motor,
An impeller body coupled to the shaft coupling plate and having an impeller vane, and
A screw flow pump having a current casing to prevent clogging of foreign matter, characterized in that it comprises a simple rate inserted between the shaft coupling plate and the impeller body to adjust the distance between the impeller vane and the guide casing.

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