CN116085312A

CN116085312A - Vertical non-blocking sewage pump

Info

Publication number: CN116085312A
Application number: CN202310188466.8A
Authority: CN
Inventors: 沈振华; 方玉建; 陈晓; 王超
Original assignee: Wenling Institute Of Product Quality Inspection Wenling Institute Of Metrological Verification; Taizhou Vocational College of Science and Technology
Current assignee: Wenling Institute Of Product Quality Inspection Wenling Institute Of Metrological Verification; Taizhou Vocational College of Science and Technology
Priority date: 2023-03-02
Filing date: 2023-03-02
Publication date: 2023-05-09

Abstract

The invention discloses a vertical non-blocking sewage pump, which comprises a volute (1), a rotating shaft (2), a base (3), an impeller (4) and a water outlet pipe (6), wherein the impeller comprises a first blade (41), a second blade (42) and a wheel disc (43); the method is characterized in that: the lower end of the volute is provided with a volute bottom wall (11), the volute bottom wall is obliquely arranged relative to the horizontal plane, a truncated cone portion (12) is arranged at the center of the volute bottom wall, a water inlet (5) is arranged on the conical surface of the truncated cone portion, the coverage range of the water inlet in the circumferential direction is 30-150 degrees, and the water inlet is arranged on one conical surface of the truncated cone portion, which is far away from the water outlet pipe. The invention can improve the fluidity of impurities at the bottom of the volute of the sewage pump, is convenient for the impurities at the bottom wall of the volute to flow to the water outlet pipe, reduces the suction resistance of the sewage pump and reduces the hydraulic flow loss, thereby ensuring the pressure and flow stability of the sewage pump.

Description

Vertical non-blocking sewage pump

Technical Field

The invention relates to the technical field of liquid pumps, in particular to a vertical non-blocking sewage pump.

Background

The sewage pump may be divided into: submerged/submersible sewage pumps, vertical sewage pumps, pipeline sewage pumps, corrosion/high temperature resistant sewage pumps, and self-priming sewage pumps. As shown in fig. 1-2, the existing vertical non-blocking sewage pump comprises a volute 1, a rotating shaft 2, a base 3, an impeller 4 and a water outlet pipe 6, wherein the base is arranged on the lower end surface of the volute, the impeller is arranged in a cavity formed by the volute, the impeller is arranged on the rotating shaft, and the water outlet pipe is arranged in a tangential direction of the volute; the impeller is a semi-open impeller, the impeller 4 comprises a first blade 41, a second blade 42 and a wheel disc 43, a plurality of first blades and a plurality of second blades are alternately arranged at intervals along the circumferential direction and are connected to one side surface of the wheel disc, and the axial height of each second blade is greater than that of each first blade. However, the existing vertical non-blocking sewage pump still has the problems of accumulation of impurities at the bottom of a volute of the sewage pump, backflow in the middle of a volute cavity and larger hydraulic flow loss.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a vertical non-blocking sewage pump, which can improve the fluidity of impurities at the bottom of a volute of the sewage pump through the design of a truncated cone-shaped part, an auxiliary impeller and a diversion cutting part, is convenient for impurities at the bottom wall of the volute to flow to a water outlet pipe, can inhibit sewage from flowing back to the middle part of a cavity of the volute, reduces the suction resistance of the sewage pump and reduces the hydraulic flow loss, thereby ensuring the pressure and flow stability of the sewage pump.

In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:

the vertical non-blocking sewage pump comprises a volute (1), a rotating shaft (2), a base (3), an impeller (4) and a water outlet pipe (6), wherein the base is arranged on the lower end surface of the volute, the impeller is arranged in a cavity formed by the volute, the impeller is arranged on the rotating shaft, and the water outlet pipe is arranged in the volute in a tangential direction; the impeller is a semi-open impeller, the impeller (4) comprises a first blade (41), a second blade (42) and a wheel disc (43), a plurality of first blades and a plurality of second blades are alternately arranged at intervals along the circumferential direction and are connected to one side surface of the wheel disc, and the axial height of the second blades is larger than that of the first blades; the method is characterized in that: the lower end of the volute (1) is provided with a volute bottom wall (11), the volute bottom wall is obliquely arranged relative to a horizontal plane, the axis of the rotating shaft (2) is perpendicular to the horizontal plane, a truncated cone portion (12) is arranged at the center of the volute bottom wall and protrudes into a cavity of the volute, a conical surface of the truncated cone portion is provided with a water inlet (5), the coverage range of the water inlet in the circumferential direction is 30-150 degrees, and the water inlet is arranged on one conical surface of the truncated cone portion, which is far away from the water outlet pipe (6).

Further, the coverage range of the water inlet (5) in the circumferential direction is 90-130 degrees; the inclination angle of the volute bottom wall (11) with respect to the horizontal plane is 1-8 deg..

Further, an auxiliary impeller (13) is arranged on the section surface of the truncated cone-shaped part (12), the auxiliary impeller is rotatably arranged on the truncated surface through an auxiliary shaft (14) and a bearing, the axis of the auxiliary impeller is collinear with the axis of the rotating shaft (2), and the auxiliary impeller is driven to rotate passively by water flow.

Further, a diversion cutting part (15) is arranged on the inner side surface of one side, far away from the water outlet pipe (6), of the volute bottom wall (11), the diversion cutting part is an arc diversion cutting part which is arranged along the arc in the circumferential direction, and the diversion cutting part comprises a first diversion cutting part (151) and a second diversion cutting part (152).

Further, the coverage area of the arc-shaped diversion cutting part (15) along the circumferential direction is larger than that of the water inlet (5), and the coverage area of the arc-shaped diversion cutting part along the circumferential direction is 120-210 degrees.

Further, the cross-sectional shape of the diversion cutting part (15) is triangular, and the triangular area or height of the first diversion cutting part (151) at the radial outer side is larger than that of the second diversion cutting part (152) at the radial inner side.

Further, an axially extending line of the outer periphery of the second vane (42) intersects an inner side surface of the volute bottom wall (11) between the first flow guiding cut portion (151) and the second flow guiding cut portion (152).

Further, an axially extending line of the outer periphery of the second blade (42) intersects with a radially inner end of the first flow guiding cut portion (151); the highest point of the auxiliary impeller (13) is higher than the lowest point of the first blade (41) and lower than the lowest point of the second blade (42).

According to the vertical non-blocking sewage pump, the wall at the bottom of the volute is obliquely arranged relative to the horizontal plane, and the water inlet is formed in the conical surface of the conical part at one side, far away from the water outlet pipe, of the volute of the sewage pump, so that the mobility of impurities at the bottom of the volute can be improved, the impurities at the bottom wall of the volute can flow to the water outlet pipe conveniently, the concentration of the impurities at the center of the wall at the bottom of the volute is inhibited, the suction resistance of the sewage pump is reduced, and the pressure and the flow stability of the sewage pump can be ensured. According to the invention, through the design of the auxiliary impeller, the backflow of sewage to the middle part of the cavity of the volute can be inhibited, so that the impurities on the wall of the bottom of the volute can flow to the water outlet pipe conveniently, and the hydraulic flow loss is reduced. According to the invention, through the design of the diversion cutting part, the impurity on the wall of the bottom of the volute can be further promoted to flow to the water outlet pipe, the hydraulic flow loss is reduced, the suction resistance of the sewage pump is reduced, and the pressure and flow stability of the sewage pump can be ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of a portion of a prior art vertical non-clogging sewage pump;

FIG. 2 is a schematic view of a prior art impeller construction;

FIG. 3 is a schematic cross-sectional view of a portion of the structure of a vertical non-clogging sewage pump of the present invention;

FIG. 4 is a schematic cross-sectional view of a portion of the structure of a vertical non-clogging sewage pump of the present invention;

fig. 5 is a schematic view of a flow guiding cutting portion according to the present invention.

In the figure: the spiral case 1, the rotating shaft 2, the base 3, the impeller 4, the water inlet 5, the water outlet pipe/water outlet 6, the first blade 41, the second blade 42, the wheel disc 43, the spiral case bottom wall 11, the truncated cone-shaped part 12, the auxiliary impeller 13, the auxiliary shaft 14, the diversion cutting part 15, the first diversion cutting part 151 and the second diversion cutting part 152.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The invention is described in further detail below with reference to the accompanying drawings.

As shown in fig. 3-5, a vertical non-blocking sewage pump comprises a volute 1, a rotating shaft 2, a base 3, an impeller 4 and a water outlet pipe 6, wherein the base 3 is arranged on the lower end surface of the volute 1, the impeller 4 is arranged in a volute cavity formed by the volute 1, the impeller 4 is arranged on the rotating shaft 2, the rotating shaft 2 is in transmission connection with a motor, and the water outlet pipe 6 is arranged on the approximately circumferential tangential direction of the volute 1; the impeller 4 is a half-open impeller, and the impeller 4 includes first blades 41, second blades 42, and a disk 43, and the plurality of first blades 41 and the plurality of second blades 42 are alternately arranged at intervals in the circumferential direction and are connected to one side surface (circumferential direction: i.e., circumferential direction)) of the disk 43, and the axial height of the second blades 42 is greater than the axial height of the first blades 41 (axial: i.e. the axis direction of the rotating shaft 2); the method is characterized in that: the lower end of the volute 1 is provided with a volute bottom wall 11, the volute bottom wall 11 is arranged obliquely relative to a horizontal plane, the axis of the rotating shaft 2 is perpendicular to the horizontal plane, a truncated cone portion 12 is arranged at the center of the volute bottom wall 11, the truncated cone portion 12 protrudes into the cavity of the volute 1, a conical surface of the truncated cone portion 12 is provided with a water inlet 5, the coverage range of the water inlet 5 in the circumferential direction is 60-150 degrees, and the water inlet 5 is arranged on one conical surface (left side of the axis of the rotating shaft 2, shown in fig. 3-4) of the truncated cone portion 12, which is far away from the water outlet pipe 6.

Preferably, the coverage of the inlet opening 5 in the circumferential direction is 90-120.

The inclination angle of the volute bottom wall 11 with respect to the horizontal is 1-8 deg., preferably 2-4 deg..

According to the vertical non-blocking sewage pump, the volute bottom wall 11 is obliquely arranged relative to the horizontal plane, the water inlet 5 is arranged on the conical surface of one side of the truncated conical part 12, which is far away from the water outlet pipe 6, so that the mobility of impurities at the bottom of the volute of the sewage pump can be improved, the impurities at the volute bottom wall 11 can flow to the water outlet pipe 6 conveniently, the concentration of the impurities at the center of the volute bottom wall 11 is inhibited, the suction resistance of the sewage pump is reduced, and the pressure and flow stability of the sewage pump can be ensured.

The truncated cone-shaped part 12 is provided with an auxiliary impeller 13 on the truncated surface, the auxiliary impeller 13 is rotatably arranged on the truncated surface through an auxiliary shaft 14 and a bearing, the axis of the auxiliary impeller 13 is collinear with the axis of the rotating shaft 2, the auxiliary impeller 13 is driven to passively rotate by water flow, and the diameter of the auxiliary impeller 13 is smaller than or equal to the minimum outer diameter of the truncated cone-shaped part 12. According to the invention, by virtue of the design of the auxiliary impeller 13, the backflow of sewage to the middle part of the cavity of the volute 1 can be inhibited, so that impurities on the bottom wall 11 of the volute can flow to the water outlet pipe 6 conveniently, the hydraulic flow loss is reduced, and the pressure and flow stability of the sewage pump can be ensured.

The inner side surface of one side of the volute bottom wall 11 far away from the water outlet pipe 6 is provided with a diversion cutting part 15, the diversion cutting part 15 is an arc diversion cutting part 15 which is arranged along the arc in the circumferential direction, and the diversion cutting part 15 comprises a first diversion cutting part 151 and a second diversion cutting part 152.

The coverage of the arc-shaped diversion cutting part 15 along the circumferential direction is larger than that of the water inlet 5, and the coverage of the arc-shaped diversion cutting part 15 along the circumferential direction is 120-180 degrees, preferably 150-180 degrees; the position of the arc-shaped diversion cutting part 15 is arranged corresponding to the position of the water inlet 5.

The cross-sectional shape of the flow guiding cut portion 15 is triangular, and the triangular area or height of the first flow guiding cut portion 151 on the radial outer side is larger than the triangular area or height of the second flow guiding cut portion 152 on the radial inner side.

The diversion cutting part 15 has the functions of diversion and impurity cutting, and through the design of the diversion cutting part 15, the invention can further promote the impurities on the wall 11 of the bottom of the volute to flow to the water outlet pipe 6, reduce the hydraulic flow loss and the suction resistance of the sewage pump, thereby improving the pressure and flow stability of the sewage pump.

As shown in fig. 4, an axially extended line of the outer periphery of the second vane 42 intersects an inner side surface of the volute bottom wall 11 between the first flow guiding cut portion 151 and the second flow guiding cut portion 152, and preferably, an axially extended line of the outer periphery of the second vane 42 intersects a radially inner end of the first flow guiding cut portion 151.

The highest point of the auxiliary impeller 13 is higher than the lowest point of the first vane 41 and lower than the lowest point of the second vane 42. The starting point position of the right end of the wall 11 at the bottom of the volute is the left end or the right end of the lower side wall of the water outlet pipe 6.

According to the vertical non-blocking sewage pump, the volute bottom wall 11 is obliquely arranged relative to the horizontal plane, the water inlet 5 is arranged on the conical surface of one side of the truncated conical part 12, which is far away from the water outlet pipe 6, so that the mobility of impurities at the bottom of the volute of the sewage pump can be improved, the impurities at the volute bottom wall 11 can flow to the water outlet pipe 6 conveniently, the concentration of the impurities at the center of the volute bottom wall 11 is inhibited, the suction resistance of the sewage pump is reduced, and the pressure and flow stability of the sewage pump can be ensured. According to the invention, by virtue of the design of the auxiliary impeller 13, the backflow of sewage to the middle part of the cavity of the volute 1 can be inhibited, so that impurities on the bottom wall 11 of the volute can flow to the water outlet pipe 6 conveniently, the hydraulic flow loss is reduced, and the pressure and flow stability of the sewage pump can be ensured. According to the invention, through the design of the diversion cutting part 15, the impurity on the wall 11 at the bottom of the volute can be further promoted to flow to the water outlet pipe 6, the hydraulic flow loss is reduced, the suction resistance of the sewage pump is reduced, and the pressure and flow stability of the sewage pump can be ensured.

It should be noted that, in the embodiments of the present invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship, movement situation, etc. between the components in a specific posture (as shown in the drawings), if the specific posture changes, the directional indicators correspondingly change, where the "connection" may be a direct connection or an indirect connection, and the "setting", "setting" may be a direct setting or an indirect setting.

The above-described embodiments are illustrative of the present invention and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.

Claims

1. The vertical non-blocking sewage pump comprises a volute (1), a rotating shaft (2), a base (3), an impeller (4) and a water outlet pipe (6), wherein the base is arranged on the lower end surface of the volute, the impeller is arranged in a cavity formed by the volute, the impeller is arranged on the rotating shaft, and the water outlet pipe is arranged in the volute in a tangential direction; the impeller is a semi-open impeller, the impeller (4) comprises a first blade (41), a second blade (42) and a wheel disc (43), a plurality of first blades and a plurality of second blades are alternately arranged at intervals along the circumferential direction and are connected to one side surface of the wheel disc, and the axial height of the second blades is larger than that of the first blades;

the method is characterized in that: the lower end of the volute (1) is provided with a volute bottom wall (11), the volute bottom wall is obliquely arranged relative to a horizontal plane, the axis of the rotating shaft (2) is perpendicular to the horizontal plane, a truncated cone portion (12) is arranged at the center of the volute bottom wall and protrudes into a cavity of the volute, a conical surface of the truncated cone portion is provided with a water inlet (5), the coverage range of the water inlet in the circumferential direction is 30-150 degrees, and the water inlet is arranged on one conical surface of the truncated cone portion, which is far away from the water outlet pipe (6).

2. A vertical non-clogging sewage pump according to claim 1, characterized in that the coverage of the inlet opening (5) in the circumferential direction is 90-150 °; the inclination angle of the volute bottom wall (11) with respect to the horizontal plane is 1-8 deg..

3. A vertical non-clogging sewage pump as claimed in claim 2, characterized in that the truncated cone section (12) is provided with an auxiliary impeller (13) rotatably mounted on the truncated surface by means of an auxiliary shaft (14), a bearing, the axis of the auxiliary impeller being collinear with the axis of the shaft (2), the auxiliary impeller being driven to rotate passively by the flow of water.

4. A vertical non-clogging sewage pump as claimed in claim 3, characterized in that the inner side of the volute bottom wall (11) far away from the water outlet pipe (6) is provided with a diversion cutting part (15), the diversion cutting part is an arc diversion cutting part arranged along the arc in the circumferential direction, and the diversion cutting part comprises a first diversion cutting part (151) and a second diversion cutting part (152).

5. A vertical non-clogging sewage pump according to claim 4, characterized in that the circumferential coverage of the arc-shaped flow guiding cut (15) is larger than the circumferential coverage of the water inlet (5), the circumferential coverage of the arc-shaped flow guiding cut being 120-210 °.

6. A vertical non-clogging sewage pump according to claim 5, characterized in that the cross-sectional shape of the diversion cut-out (15) is triangular, the triangular area or height of the radially outer first diversion cut-out (151) being larger than the triangular area or height of the radially inner second diversion cut-out (152).

7. A vertical non-clogging sewage pump as claimed in claim 6, characterized in that the extension of the outer periphery of the second vane (42) in the axial direction intersects the inner side of the volute bottom wall (11) between the first flow guiding cut (151) and the second flow guiding cut (152).

8. A vertical non-clogging sewage pump as claimed in claim 7, wherein an axially extending line of the outer periphery of said second vane (42) intersects a radially inner end of the first diversion cut portion (151); the highest point of the auxiliary impeller (13) is higher than the lowest point of the first blade (41) and lower than the lowest point of the second blade (42).