KR101909042B1 - Multi screw drainage pump - Google Patents

Abstract

A multi-screw drainage pump is disclosed. According to the present invention, the multi-screw drainage pump comprises: a housing forming a single flow path between an entrance into which water and sludge are inserted and an exit through which the water and the sludge are discharged; a screw impeller arranged in the single flow path, and formed with a plurality of the same shaped boards which are stacked with each other to form a plurality of stepped portions on an external surface; and a motor transmitting a rotating force to a rotating shaft of the screw impeller. According to the present invention, a simple sludge pulverization structure is formed to reduce manufacturing costs and increase efficiency of a pump at the same time. Moreover, the multi-screw drainage pump is provided to smoothly suck and discharge a foreign substance and a solid.

Description

MULTI SCREW DRAINAGE PUMP [0002]

The present invention relates to a multiscrew drainage pump, and more particularly, to a multiscrew drainage pump for forming a simple sludge crushing structure to increase the efficiency of a pump while simultaneously reducing manufacturing cost and smoothly sucking / discharging foreign matter and solids will be.

The drainage pump is a pump that draws up the accumulated water and is used in various places such as factories, homes, and rural areas for the purpose of transferring drainage from manure and septic tank, circulating water frequently and circulating power generation cooling water.

However, since most of the water drawn by the drainage pump contains solids, the impeller is often clogged by solids during the water uptake. Repeating this phenomenon inevitably leads to failure of the drain pump due to overload.

In this connection, Korean Utility Model Registration No. 200604 discloses a sludge pumping water pump equipped with a crusher. In a known water pump having an inlet and a discharge port and a rotating shaft receiving a rotational force from the power transmitting part, a plurality of through holes are formed in the main body of the water pump, And an impeller having a crushing blade for finely crushing the sludge accumulated on the shaft, and a crusher composed of a crushing blade for coarse crushing of the sludge.

Registration Utility Model No. 200604 discloses that sludge having a large mass among the liquid and sludge sucked through the inlet is first pulverized to reduce its volume and then pulverized again by the pulverizing blade formed on the impeller, And the sludge is directly made into fine particles and discharged together with the liquid at the same time as the pumping, so that the soil and the sludge discharge power of the liquid and the sludge are improved, so that the same efficiency can be obtained even if a small capacity water pump is used.

However, the registered utility model publication No. 200604 has a disadvantage in that the sludge is multi-stage pulverized through the blade, the impeller and the crushing net, thereby reducing the total efficiency due to the multi-stage pulverization structure and increasing the manufacturing cost. , Impeller and crushing netting are broken, the impeller is clogged due to breakdown of the multi-stage progressive crushing structure, and failure of the drain pump due to overload can not be avoided.

Korea Registered Utility Model No. 200604 (Registered on August 8, 2000)

SUMMARY OF THE INVENTION An object of the present invention is to provide a multiscrew drainage pump capable of forming a simple sludge crushing structure to increase the efficiency of a pump while simultaneously reducing the manufacturing cost and smoothly sucking / discharging foreign matter and solids.

This object is achieved according to the present invention by providing a process for producing a sludge comprising: a housing defining a single flow path between an inlet through which water and sludge are introduced and an outlet through which the sludge is introduced; A screw impeller disposed in the single flow path, the screw impeller comprising a plurality of laminated alu- minium plates and forming a plurality of steps on the outer surface; And a motor for transmitting rotational force to the rotary shaft of the screw impeller.

The screw impeller comprising: a first screw impeller disposed within the single flow path at the inlet side; And a second screw impeller disposed on the outlet side in the single flow path, wherein the rotation axes of the first screw impeller and the second screw impeller are parallel to each other.

The single flow path may be configured to be redirected at a constant curvature between the first screw impeller and the second screw impeller.

The rotary shaft of the first screw impeller and the second screw impeller may be rotated to be interlocked by a gear drive.

Wherein the isotropic plate member comprises: a center portion formed with a boss and a key groove into which the rotation axis is inserted; And a plurality of wings extending from the central portion toward the inner surface of the housing, wherein the keyways are formed at different positions for each of the plurality of the isotropic plate members.

Wherein the wing portion is formed with an insertion groove at an inner surface side end of the housing, the plurality of the identical plate materials are connected to each other by a line inserted into the insertion groove, and water and sludge So that the rope protrudes toward the inner surface of the housing.

According to the present invention, a screw impeller disposed in a single flow path is formed of a plurality of equi-plate members laminated to each other to form a plurality of steps on the outer surface, thereby forming a simple sludge pulverizing structure, So that it is possible to provide a multiscrew drainage pump that is capable of smoothly sucking / discharging foreign matter and solid matter.

1 is a perspective view of a multi-screw drainage pump according to an embodiment of the present invention;
Fig. 2 is a front view of the multiscrew drainage pump of Fig. 1; Fig.
3 is an AA sectional view of the multiscrew drainage pump of FIG.
4 is a perspective view showing a screw impeller of the multiscrew drainage pump of FIG.
5 is an exploded perspective view of the screw impeller of the multiscrew drainage pump of FIG.
6 is a perspective view showing a screw impeller of a multiscrew drainage pump according to another embodiment of the present invention.
7 is a partially exploded perspective view of the screw impeller of the multiscrew drainage pump of FIG.
Figure 8 is a partial cross-sectional view of the multiscrew drain pump of Figure 6;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions are not described in order to simplify the gist of the present invention.

The multiscrew drainage pump of the present invention forms a simple sludge crushing structure to reduce the manufacturing cost, increase the efficiency of the pump, and smoothly suck and discharge foreign matter and solids.

FIG. 1 is a perspective view of a multiscrew drainage pump according to an embodiment of the present invention, FIG. 2 is a front view of the multiscrew drainage pump of FIG. 1, FIG. 3 is an AA sectional view of the multiscrew drainage pump of FIG. FIG. 5 is an exploded perspective view of a screw impeller of the multiscrew drain pump of FIG. 4, and FIG. 6 is a perspective view of a screw impeller of a multiscrew drain pump according to another embodiment of the present invention. Fig. 7 is a partially exploded perspective view of the screw impeller of the multiscrew drainage pump of Fig. 6, and Fig. 8 is a partial cross-sectional view of the multiscrew drainage pump of Fig.

As shown in FIGS. 1 to 3, the multiscrew drainage pump 10 of the present invention forms a simple sludge crushing structure to reduce the manufacturing cost, increase the efficiency of the pump, and smoothly suck and discharge foreign matter and solids And includes a housing 100, a screw impeller 200, and a motor 300.

The housing 100 includes a screw housing 110, an elbow housing 120, an inlet and outlet housing 130, and a bearing housing 140. The housing 100 has a single flow path 101 through which water and sludge are introduced and discharged. .

The screw housing 110, the elbow housing 120, and the inlet and outlet housing 130 together form a flow space A in which water and sludge are drawn in and discharged. The elbow housing 120 and the inlet and outlet housing 130 are coupled to the screw housing 110 on opposite sides. 3, the single flow path 101 is shown as the centerline of the fluid flowing in the flow space A.

Both ends of the flow space (A) are connected to the inlet (131) and the outlet (132). As shown in FIG. 2, the inlet 131 and the outlet 132 may be connected to a pipe P through which water and sludge move, respectively. As shown in Fig. 3, the flow space A is configured to include a lower space A1, an upper space A2, and a connection space A3.

3, the screw housing 110 is configured to form a flow space A in which the screw impeller 200 is disposed. The screw housing 110 includes a lower space A1 and an upper space A2, . The screw impeller 200 is disposed in the lower space A1 and the upper space A2, respectively.

The elbow housing 120 forms a connection space A3 connecting the lower space A1 and the upper space A2 with a constant curvature. The single flow path 101 is redirected to a constant curvature by the connection space A3 between the first screw impeller 210 and the second screw impeller 220. [

Therefore, the water and the sludge flowing into the lower space A1 through the inlet 131 pass through the connection space A3 having a constant curvature, and are diverted with the energy loss minimized, and flow toward the upper space A2.

As shown in FIG. 3, the inlet and outlet housing 130 is configured to form an inlet 131 and an outlet 132, and forms a lower space A1 and an upper space A2, which are isolated from each other. The inlet 131 is connected to the lower space A1 and the outlet 132 is connected to the upper space A2.

As described above, the screw impeller 200 includes the first screw impeller 210 and the second screw impeller 220. The first screw impeller 210 is disposed in the inlet 131 side or the lower space A1 in the single flow path 101 and the second screw impeller 220 is disposed in the single flow path 101 at the outlet 132, that is, in the upper space A2.

The water and the sludge introduced into the flow space A through the inlet 131 are pressurized by the first screw impeller 210 and the second screw impeller 220 to move along the single flow path 101, .

1 and 3, the rotation shaft (hereinafter referred to as' second shaft S2 ') of the second screw impeller 220 is connected to the shaft of the motor 300 by a coupling C'. The motor 300 transmits the rotational force to the second shaft S2. The reference symbol PB denotes a pump bed, and MB denotes a motor base.

The bearing housing 140 is coupled to the inlet / outlet housing 130 on the opposite side of the screw housing 110. One end of the rotation shaft (hereinafter referred to as "first shaft S1") of the first screw impeller 210 and the other end of the second shaft S2 are rotatably mounted on the elbow housing 120, respectively.

The reference symbol SB denotes a slide bearing, and OS denotes an oil seal. The other ends of the first shaft S1 and the second shaft S2 are rotatably mounted on the bearing housing 140. [ The notation MS denotes a mechanical seal, and BR denotes a bearing.

As shown in FIG. 3, the first shaft S1 and the second shaft S2 are disposed in parallel with each other and are rotated in association with each other by a gear drive (SD). The first shaft S1 and the second shaft S2 can rotate together by a gear transmission SD having a combination of four spur gears as an example of the gear transmission SD.

The screw impeller 200 is disposed in the single flow path 101 and is configured to apply velocity energy to water and includes the first screw impeller 210 and the second screw impeller 220 as described above.

As shown in FIGS. 4 and 5, the first screw impeller 210 and the second screw impeller 220 are formed of a plurality of identical-shaped plates 201 stacked on each other. The isotropic plate 201 can be manufactured simply by laser-cutting a 1 mm to 5 mm thick plate of corrosion resistant material such as SS400, STS304 or STS316.

The isotropic plate 201 comprises a central portion 202 and a wing portion 203. The central portion 202 is a portion into which the rotation shaft is inserted, and a boss H1 and a key groove H2 through which the rotation shaft is inserted are formed. The wing portion 203 is a portion extending from the central portion 202 toward the inner surface of the housing 100, and is formed in a plurality of shapes to form a symmetrical shape around the rotation axis. 4 and 5 show an example in which three wing portions 203 are formed.

It is desirable that the gap between the end of the blade portion 203 and the inner surface of the housing 100 is designed to be 0.2 mm or less so that the foreign matter is prevented from being pinched between the screw impeller 200 and the housing 100.

However, since the screw impeller 200 is composed of a plurality of the isotropic plate members 201 laminated to each other, in order to make the gap between the end of each wing 203 and the inner surface of the housing 100 to be 0.2 mm or less, Precision machining is required for each of the parts 203. [ This can act as an opposite factor in reducing the manufacturing time and manufacturing cost of the screw impeller 200.

In addition, when the screw impeller 200 is manufactured in a laminated structure of a plurality of the isotropic plate members 201, any one of the plurality of the isotropic plate members 201 is deformed by the impact energy of the repeated solid matter. There is a risk that the deformed portion of the wing portion 203 will be opened by the centrifugal force acting on the rotating body and hit the inner surface of the housing 100. [

6 to 8, the wing portion 203 is formed with an insertion groove H3 at the inner surface side end portion of the housing 100, and a plurality of the isotropic plate materials 201 are inserted into the insertion groove H3 By means of a line 204,

Rows 204 may be made of engineering plastics. Engineering plastics are high-strength plastics used as industrial materials and structural materials. They are stronger than steel, more malleable than aluminum, and have higher polymer resistance than gold and silver. In addition to strength and elasticity, engineering plastics are excellent in impact resistance, abrasion resistance, heat resistance, cold resistance, chemical resistance and electrical insulation, and are also used as aircraft structural materials.

As shown in FIGS. 7 and 8, the string 204 is formed in a circular cross-sectional shape, and the insertion groove H3 is formed in such a shape as to surround at least half of the circular cross-section in a state where the string 204 is inserted. Therefore, the string 204 inserted into the insertion groove H3 maintains a state in which a plurality of the isotropic plate members 201 are connected.

The string 204 protrudes toward the inner surface of the housing 100 (instead of the end of the wing 203) to form a gap of 0.2 mm with the inner surface of the housing 100. The gap between the end of each wing 203 and the inner surface of the housing 100 is set to 1 to 2 mm when the string 204 is inserted into the insertion groove H3 and a gap of 0.2 mm is formed with the inner surface of the housing 100, The manufacturing time and manufacturing cost of the screw impeller 200 can be reduced while effectively suppressing the movement of water and sludge between the blade portion 203 and the inner surface of the housing 100. [

When the string 204 is protruded toward the inner surface of the housing 100 in a state where the end of the wing portion 203 is connected to the inner surface of the housing 100, any one of the isotropic plate materials 201 stacked is repeated There is an advantage that the phenomenon that the deformed portion of the wing portion 203 spreads due to the tension of the string 204 connecting the plurality of the isotropic plate materials 201 is suppressed even if the string portion is partially broken by the impact energy of the solid matter.

The housing 100 and the screw impeller 200 can not be used because the string 204 made of engineering plastic rubs against the inner surface of the housing 100 even if the deformed portion of the wing portion 203 is opened (instead of the wing portion 203) There is an advantage of preventing a sudden breakage of the battery.

5, the boss H1 is formed at the same position for each of the plurality of the isotropic plate materials 201, and the key groove H2 is formed at a different position for each of the plurality of the isotropic plate materials 201. [ The key groove H2 adjacent to each other in the laminated plate 201 can form an angle of a specific angle with respect to the center of the boss H1.

FIG. 5 shows an example in which adjacent keyways H2 are formed at an angle of 2 degrees with respect to each other. It goes without saying that the shape of the threads formed by the plurality of the isotropic plate members 201 can be variously changed by adjusting the thickness of the plate member 201 and the angle between adjacent key grooves H2.

Although not shown in detail, the shafts S1 and S2 are provided with a key corresponding to the key groove H2 of the center portion 202 in a portion contacting the plurality of isotropic plate members 201 (a portion contacting the inner surface of the boss H1) The keyway is formed long. The key K coupling the shafts S1, S2 and the screw impeller 200 is formed in the form of a long rod in one direction.

As shown in FIG. 4, when key grooves H2 adjacent to each other in the plurality of isotropic plate members 201 form an angle of a specific angle with respect to the center of the boss H1, A plurality of wing portions 203 are stacked in the form of a screw in a state where a plurality of isotropic plate members 201 are mounted on the shafts S1 and S2 using the screw impeller 200. The screw impeller 200 literally has a screw type impeller shape .

The water and the sludge introduced into the flow space A through the inlet 131 in the rotation of the motor 300 are pressurized by the rotating first screw impeller 210 and the second screw impeller 220 to flow into the single flow path 101 And is discharged through the outlet 132. [0052]

As described above, the isotropic plate 201 can be manufactured simply by laser cutting a plate of 1 mm to 5 mm in thickness resistant to corrosion such as SS400, STS304, or STS316. Accordingly, the screw impeller 200 can be used as a replacement impeller of the conventional drain pump 10 due to its ease of manufacture.

As a result of the multi-stage pulverization of the sludge through the blade, the impeller and the crushing net, there is a disadvantage in reducing the total efficiency and increasing the manufacturing cost due to the multi-stage pulverizing structure, When either the impeller or the crushing net is broken, the multi-stage successive crushing structure is broken and the impeller is clogged, and the failure of the drain pump due to the overload can not be avoided.

The multiscrew drainage pump 10 of the present invention solves the problems of the prior art by forming a plurality of steps on the outer surface of the screw impeller 200, which is composed of a plurality of plate-shaped plates 201 laminated to each other.

That is, in the multiscrew drainage pump 10 of the present invention, the first screw impeller 210 and the second screw impeller 220 are formed in the same shape to form a simple two-stage pulverized structure, (200) are formed of a plurality of laminated plate members (201), and a plurality of steps are formed on the outer surface of the plate member (200) to apply speed energy to water and sludge through the screw impeller (200) The solid content is rapidly crushed.

The multiscrew drainage pump 10 according to the present invention is constructed such that the screw impeller 200 is formed in a laminated structure of the plate member 201 so that only the damaged plate member 201 that is damaged when the screw impeller 200 is broken There is an advantage that the drain pump 10 can be quickly restarted.

According to the present invention, a screw impeller disposed in a single flow path is formed of a plurality of equi-plate members laminated to each other to form a plurality of steps on the outer surface, thereby forming a simple sludge pulverizing structure, So that it is possible to provide a multiscrew drainage pump that is capable of smoothly sucking / discharging foreign matter and solid matter.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

10: Drain pump
100: housing 200: screw impeller
110: screw housing 210: first screw impeller
120: elbow housing S1: first shaft
130: inlet / outlet housing 220: second screw impeller
131: inlet S2: second shaft
132: exit K: key
P: pipe SD: gear transmission
140: Bearing housing 201:
A: flow space 202: center
A1: Lower space H1: Boss
A2: upper space H2: keyway
A3: connection space 203: wing portion
101: Single flow path H3: Insert groove
PB: Pump bad 204: Row
MB: motor base 300: motor
SB: Slide bearing C: Coupling
OS: Oil Seal
MS: Mechanical seal
BR: Bearings

Claims (6)

A housing defining a single flow path between an inlet through which water and sludge are introduced and an outlet through which it is discharged;
A screw impeller disposed in the single flow path, the screw impeller comprising a plurality of laminated alu- minium plates and forming a plurality of steps on the outer surface; And
And a motor for transmitting rotational force to the rotating shaft of the screw impeller,
The iso-
A center portion formed with a boss and a key groove into which the rotation shaft is inserted; And
And a plurality of wings extending from the central portion toward the inner surface of the housing,
Wherein the keyway is formed at a different position for each of the plurality of the isotropic plate members. The method according to claim 1,
The screw impeller includes:
A first screw impeller disposed on the inlet side within the single flow path; And
And a second screw impeller disposed within the single flow path toward the outlet,
Wherein the rotary shaft of the first screw impeller and the second screw impeller are parallel to each other. 3. The method of claim 2,
Wherein the single flow path is redirected to a constant curvature between the first and second screw impellers. 3. The method of claim 2,
Wherein the rotary shaft of the first screw impeller and the second screw impeller is rotated in an interlocked manner by a gear drive. delete The method according to claim 1,
Wherein the wing portion is formed with an insertion groove at an inner side end portion of the housing, the plurality of identical plate members are connected to each other by a line inserted into the insertion groove,
Wherein the stem is protruded toward the inner surface of the housing such that movement of water and sludge between the wing portion and the inner surface of the housing is suppressed.

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