KR102626299B1 - Grinder-type submersible pump with improved cutting ability of foreign substances - Google Patents

Abstract

The present invention relates to a submersible pulverizing pump located underwater in a sump and transporting fluid while pulverizing foreign substances. The submersible grinding pump with improved foreign matter cutting ability according to an embodiment of the present invention includes a rotating cutter installed on the impeller and a fixed cutter installed at the intake port through which fluid is sucked, facing the impeller. In the submersible pump, the fixed cutter includes a fixed cutter hole formed through the fluid to be sucked in, a fixed protruding blade protruding from an inner periphery of the fixed cutter hole toward the center of the fixed cutter hole, and the rotary cutter includes the fixed cutter hole. A rotary cutter hole through which the fluid sucked into the suction port flows into the part where the fluid of the impeller is sucked at a position corresponding to the cut tongue hole. It is formed to protrude from the inner circumference of the rotary cutter ball and overlaps the fixed protruding blade as the impeller rotates. a rotating protruding blade for cutting foreign substances flowing between the rotating protruding blades, and a protruding rotating blade at the end of the rotating protruding blade to prevent foreign substances flowing between the rotating protruding blade and the fixed protruding blade from deviating from the end of the rotating protruding blade and being uncut. It includes a departure prevention portion that protrudes in a direction perpendicular to the rotating protruding blade. Therefore, pump efficiency can be improved by improving the cutting ability of foreign substances.

Description

Grinder-type submersible pump with improved cutting ability of foreign substances}

The present invention relates to a submersible pulverizing pump located underwater in a sump and transporting fluid while pulverizing foreign substances.

In general, a submersible pump is located underwater in a sump and transfers the fluid by sucking in fluid stored in the sump and discharging it to the outside of the sump.

Among the water collection tanks where submersible pumps are installed, the waste water tank is where foreign substances are mixed together, so a strainer is installed at the inlet to filter out foreign substances in the fluid. However, the strainer is often clogged with foreign substances and the strainer increases fluid suction, which reduces pump efficiency. There was a problem.

To solve this problem, the "foreign matter cutting type submersible motor pump" was previously disclosed in Korea Patent Publication No. 10-2447091 (announced on September 27, 2022).

The conventional foreign matter cutting type submersible motor pump has an impeller that is coupled to the motor shaft and rotates, a fluid inlet for introducing fluid, is coupled to the pump housing, and is a fixed cutter having a fixed blade for cutting foreign matter. and a rotary cutter part paired with the fixed cutter part and coupled to the impeller to cut foreign substances passing through the fixed cutter part.

The conventional foreign matter cutting type submersible motor pump configured in this way was able to solve the problem caused by the strainer by cutting the suctioned foreign matter between the fixed cutter part and the rotating cutter part and sucking it in.

However, in the conventional foreign matter cutting type submersible motor pump, even if foreign matter is located between the rotating blade of the rotary cutter and the fixed blade of the fixed cutter, the relatively strong foreign matter is pushed by the rotating blade and is not cut, or is not cut by the fixed cutter. Even if foreign matter gets caught in the rotating blade, it falls off during rotation and is sucked in, causing clogging or resistance caused by the foreign matter to increase, resulting in a decrease in pump efficiency.

In addition, among the foreign substances contained in the fluid, relatively small size foreign substances cannot be cut and are sucked in as is, so there is a problem in that pump efficiency is reduced due to jamming or jamming by the foreign substances.

The present invention was devised to solve the above-mentioned problems. The problem that the present invention aims to solve is to form a separation prevention part on the rotating protruding blade so that the fixed protruding blade remains in place even if foreign substances that have passed through the fixed protruding blade are caught on the rotating protruding blade. When cutting foreign substances while rotating in the same direction or when the fixed protruding blade and the rotating protruding blade overlap, the tip of the rotating protruding blade prevents the foreign substances from coming off, which improves the cutting ability of the foreign substances and improves the efficiency of the pump. The purpose is to provide an underwater grinding pump with improved foreign material cutting properties.

In addition, separation prevention parts are formed on both sides of the rotating protruding blade to prevent the balance of the impeller from being lost due to weight imbalance, thereby minimizing noise and vibration. This is an underwater grinding type with improved foreign material cutting ability. The purpose is to provide a pump.

In addition, by forming a peripheral protruding blade on the inner periphery of the rotary cutter, foreign substances located on the inner periphery of the rotary cutter are cut between the peripheral protruding blade and the fixed protruding blade, thereby minimizing the weight and volume of foreign substances that are sucked in, thereby reducing the resistance caused by foreign substances. Not only can pump efficiency be improved, but foreign substances can be cut and easily sucked, thereby minimizing the occurrence of foreign substances getting caught between the pump casing and the impeller.

In addition, a foreign material groove is formed between the peripheral protruding blades to trap foreign material, thereby preventing foreign material from leaving while the peripheral protruding blade moves to the fixed protruding blade, thereby improving the cutting ability of foreign material.

In addition, the cross section of the fixed protruding blade is formed in a shape where the area becomes narrower toward the lower part where fluid flows, thereby reducing fluid resistance and improving pump efficiency.

The submersible pulverizing pump with improved foreign material cutting ability according to an embodiment of the present invention for achieving the above-described problem includes a rotating cutter installed on the impeller and a fixed cutter installed at the intake port through which fluid is sucked, facing the impeller. In the submersible pump that improves the ability to cut foreign substances, the fixed cutter includes a fixed cutter hole formed through the fluid to be sucked in, and a fixed protruding blade protruding from the inner circumference of the fixed cutter hole toward the center of the fixed cutter hole, , the rotary cutter is a part of the impeller at a position corresponding to the fixed cutter tongue hole, and the rotary cutter hole through which the fluid sucked into the suction port flows, and is formed to protrude from the inner periphery of the rotary cutter hole to rotate the impeller. A rotating protruding blade that overlaps the fixed protruding blade and cuts foreign substances flowing between the blades, and prevents foreign substances introduced between the rotating protruding blade and the fixed protruding blade from deviating from the end of the rotating protruding blade and being uncut. It includes a departure prevention portion that protrudes from the end of the rotating protruding blade in a direction perpendicular to the rotating protruding blade.

The separation prevention portion may be formed to protrude from an end of the protruding rotary blade in both the forward and reverse rotation directions in which the protruding rotary blade rotates.

The rotary cutter protrudes from the circumference of the rotary cutter hole to forcibly move and cut foreign substances located around the circumference of the rotary cutter hole to the fixed protruding blade by the rotation of the impeller, and cuts the foreign substances together with the fixed protruding blade. It may include a protruding blade.

A plurality of the peripheral protruding blades are formed to protrude radially around the rotary cutter hole, and the rotary cutter moves foreign substances located around the rotary cutter hole to the position of the fixed protruding blade to cut them. It may include a groove in which foreign matter is caught between the adjacent peripheral protruding blades.

The fixed protruding blade may have a cross section whose area gradually narrows in the direction in which the fluid is sucked to reduce the resistance of the fluid flowing into the fixed cutter hole.

According to the present invention, a separation prevention part is formed at the end of the rotating protruding blade formed in the rotary cutter to prevent foreign substances caught on the rotating protruding blade from escaping, thereby preventing foreign substances from being separated from the rotating protruding blade and being uncut, thereby cutting the foreign substances. Performance can be improved.

In addition, separation prevention parts are formed on both sides of the rotating protruding blade to balance the weight of both sides of the rotating protruding blade, thereby preventing the rotational balance of the impeller from collapsing and preventing vibration or noise from occurring.

In addition, a peripheral protruding blade is formed on the inner circumference of the rotary cutter, so foreign substances not caught on the rotating protruding blade are cut by the protruding blade, thereby minimizing the weight and volume of the foreign substance, thereby reducing the resistance of the foreign substance and improving pump efficiency. .

In addition, a foreign material groove is formed between the peripheral protruding blades to trap foreign materials, so that foreign materials are cut and sucked as much as possible, thereby minimizing clogging and resistance caused by foreign materials and improving pump efficiency.

In addition, the cross-section of the fixed protrusion is formed to become increasingly narrower toward the lower part where the fluid is sucked, thereby reducing fluid resistance and improving pump efficiency.

Figure 1 is a side cross-sectional view showing a submersible grinding pump with improved foreign material cutting ability according to an embodiment of the present invention.
Figure 2 is a perspective view showing a rotating cutter and a fixed cutter of a submersible pulverizing pump with improved foreign material cutting ability according to an embodiment of the present invention.
Figure 3 is an enlarged side cross-sectional view of the portion where the rotary cutter and fixed cutter of the submersible pulverizing pump with improved foreign material cutting ability according to an embodiment of the present invention are installed.
Figure 4 is a bottom view viewed from the suction port of a submersible grinding pump with improved foreign material cutting ability according to an embodiment of the present invention.
FIG. 5 is a view showing a section cut along line AA of FIG. 2 and is a view showing the shape of the fixed cutter.
Figure 6 is a photograph taken of a state in which a prototype of a submersible crushing pump with improved foreign material cutting ability according to an embodiment of the present invention is installed in a test tank and a cutting force test is performed.
Figure 7 is a photograph of the suction port of a prototype submersible crushing pump with improved foreign material cutting ability according to an embodiment of the present invention installed in a test tank.
Figure 8 is a photograph of a PP rope cut and discharged by a prototype submersible crushing pump with improved foreign material cutting ability according to an embodiment of the present invention.

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

As shown in FIG. 1, the submersible grinding pump 100 with improved foreign material cutting ability according to an embodiment of the present invention may include a motor unit 110, a pump casing 120, and an impeller 130. there is.

The motor unit 110 can rotate the impeller 130, and the motor unit 110 is implemented as an electric motor and can be configured inside the motor casing so that it can operate even when placed underwater.

The pump casing 120 can guide the suction and discharge of fluid, and an inlet 121 through which fluid is sucked is formed in the central lower part of the pump casing 120, and at any point around the circumference of the pump casing 120. A discharge port 123 through which the fluid sucked into the suction port 121 is discharged may be formed.

The motor unit 110 may be fixedly installed on the upper part of the pump casing 120 facing the inlet 121, and the drive shaft 111 of the motor unit 110 is located at the inlet 121 of the pump casing 120. The drive shaft 111 may penetrate in the direction and be located inside the pump casing 120.

An oil chamber filled with oil for airtightening or lubricating the space between the drive shaft 111 and the pump casing 120 may be formed between the pump casing 120 and the motor unit 110.

The internal space of the pump casing (120) has a space that gradually widens in a spiral shape as it flows from a certain point to the discharge port (123), and has a discharge power that transfers the fluid by changing the hydraulic pressure of the fluid sucked into the suction port (121) into the flow velocity. may occur.

A suction cover may be installed at the suction port 121 of the pump casing 120 to seal the space between the impeller 130 and the suction port.

The impeller 130 may be installed inside the pump casing 120 and coupled to the drive shaft 111 of the motor unit 110, and may be rotated by the drive shaft 111 to suction and discharge fluid by centrifugal force. .

The impeller 130 may suck fluid into the lower center where the drive shaft 111 is coupled, and discharge the sucked fluid to the circumference.

The impeller 130 is in the form of a centrifugal impeller 130 having a plurality of disk vanes, or is a single discharge channel in which fluid is sucked into the center, curved orthogonally around the suction direction, and formed in a curved shape again in the circumferential direction. It may be a known spurt-type impeller (130) having (131).

However, since the submersible grinding pump 100 of the embodiment is often installed in wastewater tanks where a lot of foreign substances flow, it is preferable to use a spurt-type impeller 130 that minimizes the entanglement of foreign substances.

As shown in FIGS. 2 to 5, the submersible grinding pump 100 with improved foreign material cutting ability according to an embodiment of the present invention may include a fixed cutter 140.

This fixed cutter 140 can be fixedly installed at the suction port 121 of the pump casing 120.

The fixed cutter 140 is installed in the suction port 121 formed integrally with the pump casing 120, or is a suction cover that seals the opening that opens the lower part of the pump casing 120 for easy separation of the impeller 130. It may also be installed on the suction cover formed in .

The fixed cutter 140 is formed in the shape of a disk having a diameter larger than the circumference of the suction port 121 and can be fixedly installed on the pump casing 120 or the suction cover with a bolt.

The fixed cutter 140 may include a fixed cutter hole 141 and a fixed protruding blade 143.

The fixed cutter hole 141 may be formed through the center of the fixed cutter 140, and the fixed cutter hole 141 substantially functions as an inlet 121 through which fluid flowing into the inlet 121 passes. can do.

The fixed protruding blade 143 may be formed to protrude from the inner circumference of the fixed cutter hole 141 toward the center of the fixed cutter hole 141.

Here, the fixed protruding blade 143 does not completely block the fixed cutter hole 141 through which fluid is sucked, so pump efficiency can be improved by reducing suction resistance of the fluid.

A plurality of fixed protruding blades 143 may be formed to protrude radially toward the center from the inner periphery of the fixed cutter hole 141.

The fixed protruding blade 143 can reduce the suction resistance of the fluid sucked through the fixed protruding blade 143 through a cross section whose area becomes narrower as the fluid is sucked.

As shown in FIG. 5, the fixed protruding blade 143 may be formed in a shape whose width gradually narrows in the direction in which it protrudes toward the center.

As shown in Figures 2 to 5, the submersible grinding pump 100 with improved foreign material cutting ability according to an embodiment of the present invention may include a rotary cutter 150.

The rotary cutter 150 is installed on the impeller 130 and can rotate together with the impeller 130. The rotary cutter 150 faces the fixed cutter 140 and flows into the fluid flowing in through the fixed cutter hole 141. Contained foreign substances can be cut.

The rotary cutter 150 may be installed at a location where fluid flows from the impeller 130, and the rotary cutter 150 and the fixed cutter 140 face each other closely with a gap of several to several tens of mm. can be located

The rotary cutter 150 may include a rotary cutter hole 151 and a rotary protruding blade 153.

The rotary cutter hole 151 may be formed through the center of the rotary cutter 150, and the rotary cutter hole 151 allows fluid to be sucked through the fixed cutter hole 141 through the rotary cutter hole 151. It can be sucked into the impeller 130 by the suction force of the impeller 130.

When the rotary cutter 150 rotates according to the rotation of the impeller 130, the rotating protruding blade 153 can cut foreign substances located between the fixed protruding blade 143 like scissors.

The rotary cutter 150 may further include a departure prevention portion 153a and a peripheral protruding blade 155.

The separation prevention portion 153a moves foreign substances caught on the rotating protruding blade 153 according to the rotation of the rotary cutter 150 to the end of the rotating protruding blade 153 while moving to the part where the fixed protruding blade 143 is located. Or, when the rotating protruding blade 153 and the fixed protruding blade 143 overlap and cut the foreign material, the foreign material is pushed by the rotating protruding blade 153 and escapes through the end of the rotating protruding blade 153. By preventing this, the cutting ability of foreign substances can be improved.

The departure prevention portion 153a may be formed to protrude from an end located toward the center of the protruding rotary blade 153 so as to be perpendicular to the protruding rotary blade 153 in the direction in which the protruding rotary blade 153 rotates.

The separation prevention portion 153a may be formed to protrude from the end of the rotation protruding blade 153 in both the rotation direction and the reverse rotation direction.

Here, the separation prevention portion 153a, which protrudes toward the rotation direction of the rotating protruding blade 153, prevents the foreign material from leaving in order to cut the foreign material in a general situation, but protrudes in the reverse rotation direction of the rotating protruding blade 153. The separation prevention portion 153a is formed to balance the weight of the rotating protruding blade 153 and at the same time cut foreign substances between the rotating protruding blade 153 and the fixed protruding blade 143 even when the impeller 130 rotates in reverse. do.

In the embodiment, the separation prevention portion 153a is shown as protruding only on the rotating protruding blade 153 of the rotary cutter 150, but it may also be formed on the fixed protruding blade 153 of the fixed cutter 140.

The peripheral protruding blade 155 moves foreign substances located around the rotary cutter hole 151 in the direction where the fixed protruding blade 143 is located by centrifugal force when the impeller 130 rotates, along with the fixed protruding blade 143. This blade can cut foreign substances.

The peripheral protruding blade 155 may protrude from the rotary cutter hole 151 in a smaller size than the rotating protruding blade 153.

A plurality of peripheral protruding blades 155 may be formed radially spaced apart from the rotary cutter hole 151, and the space between the spaced peripheral protruding blades 155 may trap foreign substances located around the rotary cutter hole. It may be the home 155a.

Here, when the impeller rotates, the centrifugal force acts greater toward the outer side in the radial direction.

Foreign substances are located around the rotary cutter hole 151 and are sucked in. Foreign substances located around the rotary cutter hole 151 are caught between the impeller 130 and the casing, increasing the rotational resistance of the impeller 130. There is a problem that pump efficiency decreases accordingly.

However, in the present invention, when the impeller 130 rotates, foreign matter located around the rotary cutter hole 151 is caught in the foreign matter groove 155a by centrifugal force and the rotating impeller 130 is caught in the foreign matter groove 155a. As the caught foreign matter moves in the direction where the fixed protruding blade 143 is located, it is cut by the fixed protruding blade 143 and the peripheral protruding blade 155, thereby reducing the volume or weight of the foreign matter and allowing it to be immediately sucked into the impeller 130. Pump efficiency can be improved by minimizing foreign substances caught between the pump casing 120 and the pump casing 120.

Let us explain the actions and effects between each component described above.

The submersible grinding pump 100, which improves the ability to cut foreign substances according to an embodiment of the present invention, has a pump casing 120 located in the lower part of the motor unit 110, and the pump casing includes an inlet 121 for sucking fluid and a suction port 121 for sucking fluid. A discharge port 123 is formed to discharge the fluid.

An impeller 130 is installed inside the pump casing 120 to generate centrifugal force for sucking and discharging fluid, and the impeller 130 is located at a position facing the suction port 121 in the pump casing 120. ) is installed so that the part where the fluid is sucked faces and is coupled to the drive shaft 111 penetrating the pump casing 120, so that when the drive shaft 111 rotates by the motor unit 110, the impeller 130 rotates together. can do.

Meanwhile, a fixed cutter 140 is installed at the suction port 121 of the pump casing 120, and a rotating cutter 150 is installed at the part where fluid is sucked from the impeller 130, facing the fixed cutter 140 to cut foreign substances. ) is installed.

The fixed cutter 140 is formed in the center with a fixed cutter hole 141 through which the fluid sucked into the suction port 121 passes, and around the fixed cutter hole 141 is formed toward the center of the fixed cutter hole 141. A plurality of fixed protruding blades 143 are formed to protrude.

The fixed protruding blade 143 is formed in a shape where the area gradually narrows in the direction in which the fluid is sucked to minimize the resistance of the fluid, and the fixed protruding blade 143 provides airtightness to the fixed cutter hole 141 through which the fluid passes. By minimizing the resistance of the fluid due to the protrusion of the fixed protruding blade 143, pump efficiency can be improved.

Meanwhile, the rotary cutter 150 is installed on the impeller 130 and can rotate together with the impeller 130, and the fluid sucked through the inlet 121 passes through the rotary cutter 150 and flows into the impeller 130. A rotary cutter hole 151 is formed through the center.

In addition, a rotating protruding blade 153 is formed on the inner circumference of the rotating cutter hole 151 toward the center of the rotating cutter hole 151, and the rotating protruding blade 153 is located at a position corresponding to the fixed protruding blade 143. A plurality of sizes and numbers may be formed to protrude from the rotary cutter hole 151.

At the end of the rotating protruding blade 153, a departure prevention portion 153a may be formed to protrude to prevent foreign substances from leaving in the direction in which the rotary cutter 150 rotates so as to be perpendicular to the rotating protruding blade 153. (153a) may be formed to protrude in the reverse direction of the rotating protruding blade 153 in order to maintain the rotational balance of the impeller 130.

Here, the separation prevention portion 153a is formed when the rotary protruding blade 153 overlaps the fixed protruding blade 143 according to the rotation of the rotary cutter 150 or when the rotating protruding blade 153 moves toward the fixed protruding blade 143. It is possible to prevent foreign substances from being separated from the rotating protruding blade 153 and not being cut during rotation.

In addition, on the inner periphery of the rotary cutter 150, a peripheral protruding blade 155 may be formed in a smaller size than the rotating protruding blade 153, protruding from the inner periphery of the rotary cutter hole 151, and the peripheral protruding blade 155 A plurality of rotating cutter holes 151 may be formed radially spaced apart.

At this time, a foreign material groove (155a) in which foreign materials are caught may be formed between one peripheral protruding blade (155) and the immediately adjacent peripheral protruding blades (155).

Foreign matter located around the rotary cutter hole 151 is caught in the foreign matter groove 155a by centrifugal force as the impeller 130 rotates, and the fixed protruding blade 143 is forcibly positioned by the rotating cutter 150. Foreign substances can be cut by moving in the direction in which the fixed protruding blade 143 passes through the peripheral protruding blade 155.

In the submersible grinding pump 100 with improved foreign matter cutting ability according to the embodiment of the present invention configured in this way, when the drive shaft 111 is rotated by the motor unit 110, the impeller 130 rotates and the impeller 130 Fluid is sucked into the suction port 121 of the pump casing 120 and discharged through the discharge port 123 by centrifugal force generated according to the rotation of the fluid.

Meanwhile, the fluid sucked into the suction port 121 sequentially passes through the fixed cutter hole 141 and the rotating cutter hole 151 and is discharged as it flows into the discharge channel 131 of the impeller 130. Foreign matter is in the sucked fluid. When this is mixed and sucked, the rotary cutter 150 rotates according to the rotation of the impeller 130, and foreign substances are caught on the rotary protruding blade 153, and the foreign matter caught on the rotary protruding blade 153 is the rotary protruding blade 153. As the foreign matter passes through the fixed protruding blade 143, it is cut and sucked in as if being cut by scissors.

Here, even if some foreign substances pass through the fixed protruding blade 143 and get caught in the rotating protruding blade 153, they are separated while the rotating protruding blade 153 rotates so that the fixed protruding blade 143 overlaps, or the fixed protruding blade 143 Even if a foreign object is located between the ( Long foreign substances are wrapped around the impeller 130, preventing the impeller 130 from rotating, causing damage to the motor unit 110, or increasing resistance, thereby reducing pump efficiency.

However, in the present invention, since the separation prevention portion 153a is formed to protrude from the rotating protruding blade 153, it is pushed between the fixed protruding blade 143 and the rotating protruding blade 153, or the fixed protruding blade 143 is Since foreign substances are cut by rotating to the position of the part so that the foreign substances are caught on the rotating protruding blade 153 without falling off, the pump efficiency can be improved by improving the cutting ability of the foreign substances.

In addition, when the impeller 130 rotates, foreign substances contained in the fluid move around the suction port 121 and are sucked in due to centrifugal force, and the space between the suction port 121 and the pump casing 120 is caused by forced fluid suction. As abnormal turbulence occurs, there is a problem in which foreign substances become trapped between the impeller and the pump casing 120.

At this time, if the foreign matter caught between the pump casing 120 and the impeller 130 is relatively small in volume, it is not a big problem, but if a relatively large foreign matter is caught, suction resistance occurs in the sucked fluid, and the impeller ( 130), which generates rotational resistance and lowers pump efficiency.

However, in the present invention, a peripheral protruding blade 155 is formed protruding around the rotary cutter hole 151 through which fluid passes, and a foreign material groove 155a is formed between the peripheral protruding blades 155 to form an intake port 121. Foreign matter located around the foreign matter groove (155a) is caught in the foreign matter groove (155a) and is forced to pass through the fixed protruding blade (143), so that the foreign matter in the foreign substance groove (155a) is removed by the peripheral protruding blade (155) and the fixed protruding blade (143). As it is cut, the volume and weight of the foreign matter is reduced so that it can be easily sucked in by the impeller 130, thereby reducing the resistance caused by the foreign matter, minimizing jamming by the foreign matter, and improving pump efficiency.

In order to prove the effectiveness of the present invention, the applicant manufactured a prototype identical to the example as shown in Figure 6, installed it in the applicant's test tank, and performed a cutting test while continuously supplying 50 m of PP rope.

Figure 7 is a photograph taken of the inlet side of the prototype. As seen in the photograph, it can be seen that a foreign substance is caught on the rotating protruding blade 153 and cut, rather than being caught on the separation prevention portion 153a of the rotating protruding blade 153. You can.

Figure 8 is a photograph of the PP rope cut and discharged by continuously supplying 50 m of PP rope as shown in Figure 6. As shown in Figure 8, the PP rope is discharged while being completely pulverized, improving the cutting ability of foreign substances. Able to know.

Therefore, the submersible pulverizing pump 100, which improves the ability to cut foreign substances according to an embodiment of the present invention, prevents the end of the rotating protruding blade 153 of the rotary cutter 150 from being separated from the rotating protruding blade 153. The blocking portion 153a is formed to prevent foreign substances caught on the rotating protruding blade 153 from leaving until they are cut, thereby improving the cutting ability of the foreign substances and improving pump efficiency.

In addition, the separation prevention portion 153a formed on the rotating protruding blade 153 protrudes from both sides of the rotating protruding blade 153 to prevent the generation of vibration or noise due to the rotational balance of the impeller 130 being broken. there is.

In addition, a plurality of peripheral protruding blades 155 are formed on the inner periphery of the rotary cutter hole 151 of the rotary cutter 150, and a foreign matter groove 155a is formed between the peripheral protruding blades 155 to form a rotary cutter hole 151. ) is caught in the foreign material groove (155a) and is forcibly cut between the fixed protruding blade 143 and the peripheral protruding blade 155, thereby reducing the volume and weight of the foreign material and making it easier to remove the foreign material. By suction treatment, the resistance of foreign substances is reduced, improving pump efficiency and minimizing the entrapment of foreign substances.

In addition, the fixed protruding blade 143 has a cross section whose area becomes smaller as it moves toward the direction in which the fluid flows, thereby minimizing fluid resistance and improving pump efficiency.

Although the embodiments of the present invention have been described above, the scope of the rights of the present invention is not limited thereto, and the embodiments of the present invention can be easily modified by those skilled in the art in the technical field to which the present invention belongs and are recognized as equivalent. Includes all changes and modifications to the extent permitted.

100: Submersible grinding pump 110: Motor part
111: Drive shaft 120: Pump casing
121: suction port 123: discharge port
130: Impeller 131: Discharge channel
140: Fixed cutter 141: Fixed cutter ball
143: Fixed protruding blade 150: Rotating cutter
151: Rotating cutter ball 153: Rotating protruding blade
153a: departure prevention part 155: peripheral protrusion blade
155a; Foreign matter groove

Claims (5)

In the submersible pump with improved foreign material cutting ability, including a rotating cutter installed on the impeller and a fixed cutter installed at the intake port through which fluid is sucked, facing the impeller,
The fixed cutter is
A fixed cutter hole formed through the fluid to be sucked in, and
It includes a fixed protruding blade protruding from the inner circumference of the fixed cutter hole toward the center of the fixed cutter hole,
The rotary cutter is
A rotating cutter hole through which the fluid sucked into the suction port flows into the part of the impeller at a position corresponding to the fixed cutter where fluid is sucked,
A rotating protruding blade that protrudes from the inner periphery of the rotary cutter hole and overlaps the fixed protruding blade as the impeller rotates to cut foreign substances flowing between the blades;
A breakaway that protrudes from the end of the rotating protruding blade in a direction perpendicular to the rotating protruding blade to prevent foreign substances introduced between the rotating protruding blade and the fixed protruding blade from escaping from the end of the rotating protruding blade and being uncut. Lowlands, and
It includes a peripheral protruding blade that protrudes from the circumference of the rotary cutter ball and cuts foreign substances together with the fixed protruding blade so that foreign substances located around the rotary cutter ball are forcibly moved to the fixed protruding blade by the rotation of the impeller and cut. A submersible pulverizing pump with improved foreign material cutting properties. According to paragraph 1,
The escape prevention part
A submersible pulverizing pump with improved foreign material cutting properties, characterized in that the protruding rotary blade protrudes from the end of the protruding rotary blade in both the forward and reverse directions in which the protruding rotary blade rotates. delete According to paragraph 1,
A plurality of the peripheral protruding blades are formed to protrude radially around the rotating cutter hole,
The rotary cutter is
Underwater grinding with improved foreign material cutting ability, including a groove in which foreign material is caught between the peripheral protruding blade and an adjacent peripheral protruding blade to move foreign material located around the rotary cutter hole to the position of the fixed protruding blade and cut it. type pump. According to paragraph 1,
The fixed protruding blade is
A submersible pulverizing pump with improved foreign material cutting properties, characterized in that it has a cross section whose area gradually narrows in the direction in which the fluid is sucked to reduce the resistance of the fluid flowing into the fixed cutter hole.

Images