KR102447091B1 - Motor pump provided with a foreign matter cutting function - Google Patents

Abstract

Disclosed is a submersible motor pump of a foreign substance cutting type, which comprises: a pump housing having a fluid discharge port for discharging fluid; an impeller located inside the pump housing for pumping the fluid, and coupled to a motor shaft to be rotated; a fixed cutter unit having a fluid inlet for introducing the fluid, coupled to the pump housing, and having a fixed blade part for cutting foreign substances; and a rotary cutter unit paired with the fixed cutter unit, and coupled to the impeller to cut the foreign substances passing through the fixed cutter unit. Accordingly, foreign substances included in fluid sucked into a pumping chamber are cut by using the rotary cutter unit rotated along with the impeller, thereby preventing the pump housing from being clogged by the foreign substances or damage to the impeller.

Description

Foreign matter cutting type underwater motor pump {Motor pump provided with a foreign matter cutting function}

The present invention relates to a foreign material cutting type submersible motor pump, and more particularly, by using a rotary cutter rotating together with the impeller to cut the foreign material contained in the pumping fluid, the pump housing is blocked or the impeller is damaged by the foreign material It relates to a foreign material cutting type submersible motor pump that can prevent it.

In general, a pump is a device for transferring fluid, and is divided into a land pump installed on land and a submersible pump positioned in water according to the installation location of the pump. The efficiency and lift of the pump may be changed accordingly.

The double submersible pump is placed directly in the water to suck and transport the fluid without a separate suction pipe, and is mainly used for pumping muddy water mixed with soil or filth. Such a submersible pump includes a motor unit having a rotating shaft that rotates according to power supply, an impeller casing coupled to the motor unit and having an inlet and an outlet, and an impeller that is located inside the impeller casing and is coupled to the rotating shaft to rotate. is composed

In such a submersible pump, as the rotating shaft rotates according to the power supply, the impeller rotates together to form a negative pressure inside the impeller casing, and the fluid is introduced into the pump housing by the negative pressure and discharged to the outside. In addition, it may be used by connecting a transfer pipe for transferring the fluid to the pump housing.

However, in the submersible pump of the prior art as described above, unlike the land pump, when foreign substances or sludge contained in the fluid are introduced into the inside of the pump housing and caught or wound around the impeller, a failure occurs, in this case, maintenance Since maintenance must be carried out after being lifted from the water for maintenance, there is a problem that maintenance is very difficult and complicated.

Therefore, there is a need to improve it.

On the other hand, domestic registered patent No. 10-2152426 (registration date: August 31, 2020) discloses "a submersible pump equipped with an impeller for preventing foreign matter jamming".

The present invention was created by the necessity as described above, and by cutting foreign substances contained in the pumping fluid using a rotary cutter that rotates together with the impeller to prevent clogging of the pump housing or damage to the impeller by foreign substances. An object of the present invention is to provide a foreign material cutting type submersible motor pump that allows

In order to achieve the above object, there is provided a foreign material cutting type submersible motor pump according to an aspect of the present invention, comprising: a pump housing having a fluid outlet for discharging a fluid; an impeller positioned inside the pump housing for pumping the fluid, coupled to the motor shaft and rotating; a fixed cutter unit having a fluid inlet, coupled to the pump housing, and having a fixed blade unit for cutting foreign substances; and a rotating cutter unit coupled to the impeller so as to form a pair with the fixed cutter unit to cut foreign substances passing through the fixed cutter unit.

In addition, the pump housing in the present invention, the impeller is located therein, the main housing having an assembly opening for inserting the impeller; and a housing cover part coupled to the main housing to cover the assembly opening.

In addition, in the present invention, the fixed cutter part has the fluid inlet formed therein and is coupled to the housing cover part through a bolt, the fixing blade part is formed to protrude from the inner surface of the suction hole part, and the case fixing flange is formed to protrude from the outer surface. characterized in that

In addition, in the present invention, the fixed blade part is characterized in that a cutting plane in contact with the rotary cutter part is formed, and the size is decreased toward the lower side in the cutting plane.

In addition, in the present invention, the rotary cutter portion is formed in a ring shape to have a communication hole communicating with the suction hole portion of the fixed cutter portion, and the rotary blade portion protrudes from the inner surface of the communication hole portion in a shape corresponding to the fixed blade portion and an impeller fixing surface to which the lower end of the impeller is in contact with and fixed to the upper surface is formed, and a support rib is formed to protrude along the rim of the impeller fixing surface.

In addition, in the present invention, the rotating cover part is characterized in that an impeller engaging groove is formed on the impeller fixing surface and the impeller support rib.

In addition, in the present invention, the impeller, the lower end of the outer surface is supported in contact with the impeller support rib, the locking projection is formed to protrude on the lower surface is characterized in that it is inserted into the impeller locking groove portion is supported.

In addition, the impeller in the present invention, the shaft coupling boss coupled to the motor shaft is formed to protrude from the upper surface disk-shaped upper plate portion; a disk-shaped lower plate portion having a cylindrical neck portion coupled to the rotary cutter portion protrudingly formed in the central portion of the lower surface and spaced apart from the disk-shaped upper plate portion; a pumping inlet formed on a lower surface of the cylindrical neck, and a suction and discharge flow path formed in a “L” shape to form a pumping outlet that is opened between the disk-shaped upper plate and the disk-shaped lower plate; And it is formed between the disk-shaped upper plate portion and the disk-shaped lower plate portion to provide a pumping force for pumping the fluid, and the depth formed from the outside to the central portion gradually increases to include a pumping flow passage connected to the pumping outlet. characterized in that

In addition, in the present invention, the impeller is characterized in that one vane is formed by the suction/discharge passage portion and the pumping passage portion.

In addition, in the present invention, the vane is characterized in that the thickness gradually decreases from the center to the outside.

In addition, in the present invention, the pump housing is characterized in that it is divided vertically to form a cutter coupling groove for fixing the fixed cutter.

In addition, in the present invention, the impeller is characterized in that it has a plurality of blades in a propeller type.

In addition, in the present invention, the rotary cutter portion is formed in a ring shape to surround the end of the blade portion, characterized in that it is joined to the blade portion.

In addition, in the present invention, the fixed cutter is coupled to the pump housing to guide the rotation of the rotary cutter, and surrounds the outer surface of the rotary cutter.

In addition, in the present invention, the fixed cutter includes an upper support guide rim that is inserted and fixed into the cutter coupling groove to surround the upper end of the rotatable cutter, and is inserted into the cutter coupling groove to surround the lower end of the rotatable cutter. It is fixed, and it is characterized in that it comprises a lower guide cutting rim for cutting foreign matter by pairing with the rotary cutter.

In addition, in the present invention, the impeller is shaft-coupled to the motor shaft of the motor part, and a spherical hub part to which the blade part is fixed, and a blade provided in the spherical hub part and the blade part so that the blade part can be assembledly fixed. It characterized in that it further comprises an assembly part.

In addition, in the present invention, the blade assembly portion includes an assembly space formed inside the spherical hub portion to be opened to a lower surface of the spherical hub portion, an assembly hole formed through the outer surface of the spherical hub portion to the assembly space, and the blade and an assembly bolt part joined to the part and inserted into the assembly space part through the assembly hole part, and an assembly nut part fastened to the assembly bolt part inside the assembly space part to fix the assembly bolt part. do.

As described above, the foreign material cutting type submersible motor pump according to an aspect of the present invention cuts foreign substances contained in the pumped fluid by using a rotary cutter that rotates together with the impeller, unlike the prior art, This has the effect of preventing the pump housing from being blocked or the impeller from being damaged by foreign substances.

1 is a cross-sectional perspective view for explaining a foreign material cutting type submersible motor pump according to a first embodiment of the present invention.
2 is a cross-sectional view for explaining a foreign material cutting type submersible motor pump according to the first embodiment of the present invention.
3 is an enlarged view of the main part for explaining the foreign material cutting type submersible motor pump according to the first embodiment of the present invention.
4 is an enlarged view of the main part showing the installation state of the fixed cutter part and the rotary cutter part according to the first embodiment of the present invention.
5 is a perspective view illustrating a fixed cutter unit and a rotary cutter unit according to a first embodiment of the present invention.
6 is a perspective view illustrating an impeller according to a first embodiment of the present invention.
7 is a front view for explaining the impeller according to the first embodiment of the present invention.
8 is a cross-sectional view taken along line AA of FIG. 7 .
9 is a perspective view for explaining a foreign material cutting type submersible motor pump according to a second embodiment of the present invention.
10 is a cross-sectional view for explaining a foreign material cutting type submersible motor pump according to a second embodiment of the present invention.
11 is a perspective view illustrating an impeller, a rotary cutter, and a fixed cutter according to a second embodiment of the present invention.
12 is a perspective view illustrating an impeller according to a second embodiment of the present invention.
13 is an exploded perspective view illustrating an impeller according to a second embodiment of the present invention.
14 is a cross-sectional view for explaining an impeller according to a second embodiment of the present invention.

Hereinafter, a preferred embodiment of the foreign material cutting type submersible motor pump according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, definitions of these terms should be made based on the content throughout this specification.

1 is a cross-sectional perspective view for explaining a foreign material cutting type underwater motor pump according to a first embodiment of the present invention, Figure 2 is a cross-sectional view for explaining a foreign material cutting type underwater motor pump according to the first embodiment of the present invention , Figure 3 is an enlarged view of the main part for explaining the foreign material cutting type submersible motor pump according to the first embodiment of the present invention.

In addition, FIG. 4 is an enlarged view showing the installation state of the fixed cutter unit and the rotating cutter unit according to the first embodiment of the present invention, and FIG. 5 is the fixed cutter unit and the rotating cutter unit according to the first embodiment of the present invention. It is a perspective view for explaining the part.

In addition, Figure 6 is a perspective view for explaining the impeller according to the first embodiment of the present invention, Figure 7 is a front view for explaining the impeller according to the first embodiment of the present invention, Figure 8 is a line A-A of Figure 7 It is a cross section.

1 to 8, the foreign material cutting type submersible motor pump 100 according to the first embodiment of the present invention is a large pump housing 110 and , an impeller 120 , a fixed cutter unit 130 , and a rotary cutter unit 140 .

In addition, the foreign material cutting type submersible motor pump 100 according to the present invention further includes a motor unit 150 coupled to the pump housing 110 for the operation of the impeller 120 , the motor of the motor unit 150 . The shaft 151 is inserted into the pump housing 110 and shaft-coupled to the impeller 120 .

In the foreign material cutting type submersible motor pump 100 according to the present invention, foreign substances contained in the fluid sucked into the pump housing 110 through the rotation of the impeller 120 are the fixed cutter unit 130 and the rotary cutter unit. Since it is cut while passing through 140, it is possible to prevent clogging of the pump housing 110 and the impeller 120 by foreign substances.

In the pump housing 110 according to the present embodiment, the motor unit 150 is coupled to the upper portion, the impeller 120 is inserted therein, and the fluid pumped by the impeller 120 to discharge the fluid flowing therein. A discharge port (110a) is formed on the side.

The pump housing 110 includes a main housing 111 into which the impeller 120 is inserted, and a housing cover part 113 for covering the main housing 111 , and is inserted into the main housing 111 . In a state in which the impeller 120 is inserted, the housing cover part 113 is coupled to the main housing 111 . Through this, the impeller 120 can be easily installed inside the main housing 111 .

The main housing 111 has a pumping chamber 111a formed therein so as to generate a pumping force due to rotation of the impeller 120, and a fluid outlet 110a is formed on one side of the pumping chamber 111a, and the pumping chamber The lower side of the 111a is opened to form an assembly opening 111b. In addition, the motor unit 150 is coupled to the upper end of the main housing 111 .

In the main housing 111 , the impeller 120 is inserted into the pumping chamber 111a through the assembly opening 111b , and the assembly opening 111b is covered by the housing cover part 113 .

The housing cover part 113 is coupled to the main housing 111 to cover the assembly opening 111b, and a cutter coupling part 113a for coupling the fixed cutter part 130 is extended. In addition, a support rim 113b is formed on the upper surface of the housing cover 113 to be firmly coupled to the assembly opening 111b of the main housing 111 .

The pump housing 110 is generated by the suction force of the fluid in the pumping chamber 111a by the rotation of the impeller 120 installed in the pumping chamber 111a to transfer the fluid.

The impeller 120 according to the present embodiment is rotatably inserted into the pumping chamber 111a of the main housing 111 to pump the fluid into the pumping chamber 111a, and is shaft-coupled to the motor shaft 151 . The impeller 120 is coupled to the lower end of the rotary cutter unit 140 and rotates together with the rotary cutter unit 140 to generate a pumping force and at the same time generate a cutting force for cutting foreign substances.

Specifically, the impeller 120 includes a disk-shaped upper plate part 121 in which a shaft coupling boss 121a coupled to the motor shaft 151 is formed to protrude from the upper surface, and a cylindrical neck part coupled to the rotary cutter part 140 ( 123a) is formed to protrude from the disk-shaped lower plate portion 123, the suction and discharge flow passage 125 formed in a “L” shape for suction and discharge of fluid, and the disk-shaped upper plate portion 121 for generating a pumping force. and a pumping passage portion 127 formed between the cylindrical lower plate portion 123 and the cylindrical lower plate portion 123 . At this time, a vane 129 for fluid transport and pumping is formed between the disk-shaped upper plate part 121 and the cylindrical lower plate part 123 by the pumping passage part 127 . Through this, it is possible to increase the strength of the vane 129 and increase the durability of the impeller 120 at the same time.

The disk-shaped upper plate part 121 has a shaft coupling boss 121a coupled to the motor shaft 151 protruding from the top surface, and a shaft coupling hole for insertion and coupling of the motor shaft 151 to the shaft coupling boss 121a. is formed At this time, since the shaft coupling hole communicates up to the suction/discharge passage portion 125 , the impeller 120 can be easily assembled to the motor shaft 151 .

The disk-shaped lower plate part 123 is formed to have the same diameter as the disk-shaped upper plate part 121, and a cylindrical neck part ( 123a). The lower end of the cylindrical neck portion 123a is seated and supported in contact with the rotary cutter unit 140 , and a locking protrusion 123b is protruded from the lower surface so that the coupling force and supporting force with the rotary cutter unit 140 are improved.

On the other hand, in the cylindrical neck portion 123a, the suction/discharge passage portion 125 is formed on the side between the disk-shaped upper plate portion 121 and the disk-shaped lower plate portion 123.

At this time, the suction discharge passage 125 has a pumping inlet 125a formed on the lower surface of the cylindrical neck portion 123a, and the pumping outlet 125b is opened between the disk-shaped upper plate portion 121 and the disk-shaped lower plate portion 123. formed to be For example, the suction/discharge flow path part 125 may be formed in a "L" shape on the impeller 120 .

The pumping passage part 127 is formed between the disk-shaped upper plate part 121 and the disk-shaped lower plate part 123 to provide a pumping force for pumping the fluid, and the depth gradually increases from the outside to the central part. . The pumping passage 127 forms a taegeuk-shaped vane 129 together with the suction and discharge passage 125 .

The vane 129 has a Taegeuk shape whose thickness is gradually reduced from the central portion of the impeller 120 toward the outer peripheral surface. The vane 129 may have improved durability to prevent deformation and damage caused by foreign substances, and may improve pumping force.

The impeller 120 configured in this way generates a pumping force that sucks in an external fluid through rotation, and is sucked into the suction/discharge passage 125 through the fixed cutter unit 130 and the rotary cutter unit 140 . Foreign substances contained in the fluid are cut, enabling smooth pumping.

In addition, the fixed cutter unit 130 and the rotary cutter unit 140 form a pair to cut foreign substances introduced through the suction/discharge passage unit 125 . At this time, the fixed cutter unit 130 is fixed to the housing cover unit 113 , and the rotary cutter unit 140 is fixed to the impeller 120 , respectively, and is disposed upward so that the cutting surfaces are in contact with each other. For example, the rotary cutter unit 140 is positioned above the fixed cutter unit 130 .

The fixed cutter part 130 is formed in a ring shape to form the fluid inlet 131 and is fixed to the cutter coupling part 113a of the housing cover part 113 through a bolt. The fixed cutter unit 130 has a fixed blade unit 133 protruding from the inner surface of the fluid inlet 131 for cutting foreign substances.

The fixed blade 133 is formed to protrude three equal intervals from the fluid inlet 131 , and has a wedge shape whose width gradually decreases toward the center of the fluid inlet 131 . In addition, the fixed blade part 133 is formed with a cutting plane 133a in contact with the rotary cutter part 140, and decreases in size from the cutting plane 133a to the lower side.

In addition, the fixed cutter unit 130 has a case fixing flange 135 protruding from the outer surface, and a bolt fastening hole is formed on the case fixing flange 135 .

The rotary cutter unit 140 is coupled with the cylindrical neck unit 123a of the impeller 120 so as to be paired with the fixed cutter unit 130 to cut the foreign material introduced through the fluid inlet 131 and the impeller 120 and rotate together The rotary cutter unit 140 is formed in a ring shape to form a communication hole portion 141 communicating with the fluid inlet 131 , and a rotary blade portion 143 is protruded from the inner surface of the communication hole portion 141 . At this time, the rotary blade portion 143 is formed in a shape corresponding to the fixed blade portion 133, and two are formed to protrude at equal intervals.

In addition, the rotary cutter unit 140 is formed with an impeller fixing surface 145 supported by contacting the lower end of the cylindrical neck unit 123a on the upper surface so as to be closely and firmly fixed to the cylindrical neck unit 123a. A bolt fastening hole is formed in the impeller fixing surface 145 to fix the rotary cutter unit 140 to the cylindrical neck unit 123a using a bolt.

In addition, the rotary cutter unit 140 has a support rib 147 supported in contact with the outer surface of the cylindrical neck unit 123a along the edge of the impeller fixing surface 145 to protrude upward. The patented rotary cutter unit 140 has an impeller engaging groove 149 formed on the impeller fixing surface 145 and the impeller supporting rib 147 to further improve the coupling force and supporting force with the impeller 120 , and the impeller engaging groove At 149, the locking projection 123b of the impeller 120 is inserted.

The foreign material cutting type submersible motor pump 100 according to the first embodiment of the present invention configured as described above is a taegeuk-shaped vane on the impeller 120 by the pumping passage 127 and the suction and discharge passage 125 . Since the 129 is formed, the durability of the impeller 120 can be further improved while preventing the deterioration of the function. In addition, since it is possible to manufacture a mold at a time without forming the impeller 120 in divisions, durability can be further improved.

In particular, the foreign material cutting type submersible motor pump 100 according to this embodiment is coupled to the fixed cutter unit 130 and the impeller 120 fixed to the pump housing 110 and the rotary cutter unit 140 to rotate together. Since foreign substances contained in the pumped fluid can be cut by using ) can be prevented from being clogged, and damage and deformation of the impeller 120 can be prevented by foreign substances.

Next, a foreign material cutting type submersible motor pump according to a second embodiment of the present invention will be described with reference to FIGS. 9 to 14 .

9 is a perspective view for explaining a foreign material cutting type submersible motor pump according to a second embodiment of the present invention, and FIG. 10 is a cross-sectional view for explaining a foreign material cutting type underwater motor pump according to a second embodiment of the present invention, 11 is a perspective view illustrating an impeller, a rotary cutter, and a fixed cutter according to a second embodiment of the present invention.

In addition, Figure 12 is a perspective view for explaining the impeller according to the second embodiment of the present invention, Figure 13 is an exploded perspective view for explaining the impeller according to the second embodiment of the present invention, Figure 14 is the second embodiment of the present invention It is a cross-sectional view for explaining the impeller according to the second embodiment.

As shown in FIGS. 9 to 14 , the foreign material cutting type submersible motor pump 200 according to the second embodiment of the present invention is blocked or damaged due to suction of foreign substances such as grass and weeds mixed with sewage and sewage. is designed to prevent

Specifically, the foreign material cutting type submersible motor pump 200 according to this embodiment is largely a pump housing 210 for suction and discharge of a fluid, an impeller 220 for generating a pumping force for suction of a fluid, and a pump housing It includes a rotary cutter unit 230 and a fixed cutter 240 for cutting foreign substances of the fluid flowing into the 210 .

In addition, the foreign material cutting type submersible motor pump 200 according to the present embodiment further includes a motor unit 250 coupled to the pump housing 210 to be connected to the impeller 220 , and the motor shaft of the motor unit 250 . 251 is inserted into the pump housing 210 and shaft-coupled to the impeller 220 .

The foreign material cutting type submersible motor pump 200 according to the present invention cuts the foreign material sucked into the impeller 220 by the rotary cutter unit 230 rotating together with the impeller 220 when pumping the fluid. , to prevent foreign substances from being wound around the impeller 220 to prevent the motor unit 250 from being overloaded.

The pump housing 210 guides the rotation of the impeller 220, and the fluid suction port 210a and the fluid discharge port 210b are respectively formed so that the fluid is sucked downward through the rotation of the impeller 220 and discharged upward. The pump housing 210 has a motor unit 250 coupled to an upper central portion, and a fixed cutter 240 coupled therein.

For example, the pump housing 210 is coupled to the motor unit 250 and forms an upper housing 211 that forms a fluid outlet 210b, and a fluid inlet 210a that is coupled to the lower portion of the upper housing 211. and a lower housing 213 . At this time, a cutter coupling groove 215 for installing the fixed cutter 240 is formed between the upper housing 211 and the lower housing 213 .

As such, when the pump housing 210 is divided into an upper housing 211 and a lower housing 213 , the fixed cutter 240 can be easily installed.

The impeller 220 according to this embodiment is rotatably located in the inner central portion of the pump housing 210 for pumping the fluid, and is a shaft on the motor shaft 251 of the motor unit 250 coupled to the pump housing 210 . are combined The impeller 220 is integrally joined with the rotary cutter unit 230 through welding, etc., and the rotary cutter unit 230 is coupled to the motor shaft 251 to be located inside the fixed cutter 240 .

In particular, the impeller 220 is easy to manufacture and is configured to easily bond the rotary cutter unit 230 . Specifically, the impeller 220 includes a spherical hub part 221 axially coupled to the motor shaft 251 , a blade part 223 assembled to the spherical hub part 221 and joined to the rotary cutter part 230 , and , and a blade assembly part 225 for fixing the blade part 223 to the spherical hub part 221 .

The spherical hub part 221 is formed with a shaft coupling boss 221a to which the motor shaft 251 is coupled to the upper end protrudes, and the blade parts 223 are assembled to the outer surface at equal intervals through the blade assembly part 225 .

The blade assembly part 225 is configured to fix the blade part 223 to the spherical hub part 221 in a prefabricated manner. Specifically, the blade assembly part 225 includes an assembly space 225a formed inside the spherical hub part 221 to open to the lower surface of the spherical hub part 221 , and a spherical hub to penetrate through the assembly space 225a . The assembly hole 225b that is formed through the assembly space 225a from the outer surface of the part 221, is joined to the blade 223 and inserted into the assembly space 225a through the assembly hole 225b. It includes an assembling bolt part 225c and an assembly nut part 225d fastened to the assembling bolt part 225c.

The assembly space 225a has a nut assembly surface 225e of a flat inner surface so that the assembly nut part 225d can be more firmly fastened.

The blade part 223 is joined to the inner surface of the assembly nut part 225d, and the outer surface is joined to the rotary cutter part 230 in a state assembled to the spherical hub part 221 .

The assembly bolt portion 225c has a head portion 225c ′ to improve bonding force by increasing the area in contact with the blade portion 223 , and the head portion 225c ′ is joined to the blade portion 223 . do. In addition, the assembly bolt part 225c is inserted into the assembly hole part 225b, and the assembly nut part 225d is fastened.

The assembling hole part 225b has a head seating end part 225b' on which the head part is inserted and seated so that the assembling bolt part 225c inserted therein is more firmly supported.

The assembly nut part 225d is fastened to the assembly bolt part 225c inside the assembly space part 225a to firmly fix the blade part 223 to the spherical hub part 221 . At this time, a plurality of assembly nut portions 225d are fastened to one assembly bolt portion 225c to prevent loosening and further improve coupling force.

On the other hand, the assembly space portion 225a opened to the lower surface of the spherical hub portion 221 is covered by the hemispherical hub cover portion 213a formed in the lower housing 213 .

The rotary cutter unit 230 according to the present embodiment is bonded to the end of the blade unit 223 of the impeller 220 so as to be positioned inside the fixed cutter 240 to rotate. The rotary cutter unit 230 is formed in a ring shape, and its outer surface is disposed to be wrapped around the fixed cutter 240 to form a pair with the fixed cutter 240 to cut foreign substances.

In addition, the rotary cutter unit 230 has a rotating blade 231 protruding from the inner surface for cutting foreign substances, and the rotating blade 231 has a wedge shape.

The fixed cutter 240 according to this embodiment is coupled to the cutter coupling groove 215 of the pump housing 210 to guide the rotation of the rotary cutter 230 in a form surrounding the outer surface of the rotary cutter 230 . becomes

The fixed cutter 240 includes an upper support guide rim 241 inserted and fixed into the cutter coupling groove 215 so as to surround the upper end of the rotary cutter unit 230 , and a lower end of the rotary cutter unit 230 . It has a lower guide cutting rim 243 inserted and fixed in the cutter coupling groove 215 so as to surround it. At this time, the lower guide cutting rim 243 is paired with the rotary cutter unit 230 and the fixed blade unit 245 is formed to protrude in a wedge shape on the inner surface to cut the foreign material.

In addition, coupling flanges 247 coupled to the upper housing 211 and the lower housing 213 respectively protrude from the upper support guide rim 241 and the lower guide cutting rim 243 . The coupling flange 247 is fixed to the pump housing 210 through fastening, such as bolts.

In the foreign material cutting type submersible motor pump 200 according to the second embodiment of the present invention configured as described above, the foreign material contained in the fluid that is sucked through the fluid suction port 210a and passes through the impeller 220 is the impeller 220 ) is cut by the rotary cutter unit 230 that rotates together. Accordingly, it is possible to prevent damage to the impeller 220 by foreign substances.

In addition, in the foreign material cutting type submersible motor pump 200 according to this embodiment, the rotary cutter unit 230 is joined to the blade unit 223 of the impeller 220 rotating in the pump housing 210 for pumping. Since the impeller 220 and the rotary cutter 230 can be manufactured integrally, durability of the impeller 220 can be reinforced.

In addition, the foreign material cutting type submersible motor pump 200 according to this embodiment, when the fixed cutter 240 guides the rotation of the rotary cutter unit 230, it cuts the foreign material together with the rotary cutter unit 230, It can significantly reduce the occurrence of breakage or deformation due to impacts generated during cutting of foreign substances. That is, the durability and cutting performance of the rotary cutter unit 230 can be further improved.

Although the present invention has been described with reference to the embodiment shown in the drawings, this is merely exemplary, and those of ordinary skill in the art to which various modifications and equivalent other embodiments are possible. will understand

Accordingly, the true technical protection scope of the present invention should be defined by the claims.

100, 200: foreign material cutting type submersible motor pump 110: pump housing
111: main housing 111a: pumping chamber
111b: assembly opening 113: housing cover part
113a: cutter coupling part 113b: support rim
120: impeller 121: cylindrical upper plate
121a: shaft coupling boss 123: cylindrical lower plate part
123a: cylindrical neck portion 123b: locking projection
125: suction and discharge flow path part 125a: pumping inlet
125b: pumping outlet 130: fixed cutter part
131: fluid inlet 133: fixed blade part
133a: cutting plane 135: case fixing flange
140: rotary cutter part 141: communication hole part
143: rotary blade 145: impeller fixed surface
147: impeller support rib 149: impeller engaging groove
150: motor unit 151: motor shaft
210a: fluid inlet 210b: fluid outlet
211: upper housing 213: lower housing
213a: hub cover portion 215: cutter coupling groove portion
220: propeller impeller 221: spherical hub portion
221a: weight coupling boss 223: blade part
225: blade assembly 225a: assembly space
225b: assembly hole part 225c: sleep bolt part
225d: assembly nut part 230: rotary cutter part
231: rotary blade 240: fixed cutter
241: upper support guide rim 243: lower guide cutting rim
245: fixed blade 247: coupling flange
250: motor unit 251: motor shaft

Claims (10)

a pump housing having a fluid outlet for discharging the fluid; an impeller positioned inside the pump housing for pumping the fluid, coupled to the motor shaft and rotating; a fixed cutter unit coupled to the pump housing and having a fixed blade unit to cut foreign substances; and a rotary cutter unit coupled to the impeller and paired with the fixed cutter unit to cut foreign substances introduced into the pump housing;
The pump housing is vertically divided to form a cutter coupling groove for fixing the fixed cutter,
The impeller is provided with a plurality of blades in a propeller type,
The rotary cutter part is formed in a ring shape to surround the end of the blade part and is joined to the blade part,
The fixed cutter is coupled to the pump housing to guide the rotation of the rotary cutter and surrounds the outer surface of the rotary cutter,
The fixed cutter may include: an upper support guide rim that is inserted into and fixed to the cutter coupling groove so as to surround the upper end of the rotatable cutter; and
a lower guide cutting rim that is inserted into and fixed to the cutter coupling groove to surround the lower end of the rotary cutter, and cuts foreign substances in pairs with the rotary cutter;
A foreign material cutting type submersible motor pump comprising a.
The method of claim 1,
The pump housing may include a main housing in which the impeller is positioned and having an assembly opening for inserting the impeller; and a housing cover part coupled to the main housing to cover the assembly opening.
The fixed cutter part has a fluid inlet formed in the central part and is coupled to the housing cover part through a bolt, the fixed blade part is formed to protrude from the inner surface of the fluid inlet, and a case fixing flange is formed to protrude from the outer surface. Submersible motor pump for cutting foreign matter.
3. The method of claim 2,
The fixed blade part is formed with a cutting plane in contact with the rotary cutter part, and the size decreases toward the lower side in the cutting plane,
The rotary cutter part is formed in a ring shape to have a communication hole part communicating with the fluid inlet, and a rotating blade part is protruded in a shape corresponding to the fixed blade part on the inner surface of the communication hole part, and the lower end of the impeller is formed on the upper surface. A foreign material cutting type submersible motor pump, characterized in that the impeller fixing surface is formed in contact and fixed, and the impeller support rib is formed to protrude along the rim of the impeller fixing surface.
4. The method of claim 3,
The rotary cutter unit has an impeller engaging groove formed on the impeller fixing surface and the impeller support rib,
The impeller is a foreign material cutting type submersible motor pump, characterized in that the lower end is supported by being in contact with the impeller support rib, and a locking protrusion is formed on the lower surface to be inserted and supported in the impeller locking groove.
5. The method according to any one of claims 1 to 4,
The impeller may include: a disk-shaped upper plate in which a shaft coupling boss coupled to the motor shaft protrudes from an upper surface;
a disk-shaped lower plate portion having a cylindrical neck portion coupled to the rotary cutter portion protrudingly formed in the central portion of the lower surface and spaced apart from the disk-shaped upper plate portion;
a pumping inlet formed on a lower surface of the cylindrical neck, and a suction and discharge flow path formed in a “L” shape to form a pumping outlet that is opened between the disk-shaped upper plate and the disk-shaped lower plate; and
a pumping passage part formed between the disk-shaped upper plate part and the disk-shaped lower plate part to provide a pumping force for pumping the fluid, the depth formed from the outside to the central part gradually deepens and connected to the pumping outlet;
A foreign material cutting type submersible motor pump comprising a.
6. The method of claim 5,
The impeller forms one vane by the suction/discharge flow path part and the pumping flow path part,
The vane is a foreign material cutting type submersible motor pump, characterized in that the thickness gradually decreases from the central part to the outside.
delete delete The method of claim 1,
The impeller is shaft-coupled to the motor shaft of the motor part, the spherical hub part to which the blade part is fixed; and
a blade assembly part provided in the spherical hub part and the blade part so as to fix the blade part in a prefabricated manner;
Foreign material cutting type submersible motor pump, characterized in that it further comprises.
10. The method of claim 9,
The blade assembly portion may include: an assembly space formed inside the spherical hub portion to be opened to a lower surface of the spherical hub portion;
an assembly hole formed through the outer surface of the spherical hub into the assembly space;
an assembly bolt part joined to the blade part and inserted into the assembly space part through the assembly hole part; and
an assembly nut part fastened to the assembly bolt part inside the assembly space part to fix the assembly bolt part;
A foreign material cutting type submersible motor pump comprising a.

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