CN108506221B - Sewage pump capable of cleaning and blocking in full-lift range - Google Patents
Sewage pump capable of cleaning and blocking in full-lift range Download PDFInfo
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- CN108506221B CN108506221B CN201810422240.9A CN201810422240A CN108506221B CN 108506221 B CN108506221 B CN 108506221B CN 201810422240 A CN201810422240 A CN 201810422240A CN 108506221 B CN108506221 B CN 108506221B
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- volute
- impeller
- water inlet
- knife
- water
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/02—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
- B26D1/03—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/18—Rotors
- F04D29/22—Rotors specially for centrifugal pumps
- F04D29/2261—Rotors specially for centrifugal pumps with special measures
- F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
- F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a sewage pump capable of cleaning and blocking in a full lift range, which comprises a motor main body, at least one volute and an impeller arranged in each volute, wherein at least one blade is arranged in the impeller, a flow passage is formed between the upstream surface of the blade and the upstream surface of the opposite blade, and the caliber of a water inlet end of each flow passage is larger than that of a water outlet end; each runner is divided into a vacuum area, an energy storage area and a pressure relief area, wherein the water outlet included angle of the energy storage area is larger than that of the vacuum area, so that a larger energy storage space is ensured; the caliber of the water inlet end of the runner is larger than that of the water outlet end and the energy storage area in a larger space exists, the flow rate of the impeller water outlet is limited, the energy storage area in the larger space is ensured, and enough high-pressure water is flushed out of the volute water outlet at a high speed, so that the sewage pump has better efficacy in high-lift or low-lift operation.
Description
Technical Field
The invention relates to the technical field of sewage pumps, in particular to a sewage pump capable of cleaning sewage and preventing blockage in a full-lift range.
Background
The sewage pump belongs to one kind of centrifugal impurity pump, and is mainly used for conveying urban sewage, excrement or other liquid containing paper scraps, stones, metal wires and other impurities, and because the conveyed medium contains fiber matters which are easy to wind or bunch, the sewage pump is easy to block, and the blocking can cause the pump to work abnormally, even burn out a motor, cause unsmooth sewage discharge and bring serious influence to urban life and environmental protection. The advantages and disadvantages of the sewage pump are mainly measured from the two aspects of anti-blocking performance and full-lift working performance. The anti-blocking property is that the anti-blocking property of the sewage pump is enhanced and the passing capacity of the sewage pump is improved due to the increasing of solid matters and fiber contents in the urban sewage and the increasing of sewage disposal cost, so that the important direction for researching the sewage pump is that the easy blocking site of the sewage pump is mainly the water inlet of the volute, the water inlet of the impeller, the motor output shaft and the water outlet of the volute.
The full-lift working performance is the consideration of the working efficiency of the sewage pump in each lift within the full-lift range, the sewage pump with better efficacy in the higher-lift range is called a high-lift sewage pump, and the sewage pump with better efficacy in the lower-lift range is called a low-lift sewage pump. Therefore, in order to adapt to different lift ranges, different sewage pumps are generally required to be replaced, which causes cost waste, so how to make sewage pumps have better efficacy in larger lift ranges is a problem to be solved. To solve this problem, sewage pumps are generally improved from the following aspects: firstly, the water yield is constantly controlled, the low-lift water pump cannot have good efficacy due to the fact that the water yield is reduced when working at a high lift, if the low-lift water pump is used at a low lift, the working strength of the sewage pump is increased and overloaded due to the fact that the sewage is continuously fed into the sewage pump due to the fact that the water yield of the water pump is increased, and if the sewage pump can have constant water yield in the whole lift range, the good efficacy of the sewage pump can be guaranteed under any lift; secondly, the power of the motor is increased, so that the sewage pump can be used in a larger lift range, but the increased power of the motor not only increases the cost and weight of the sewage pump, but also needs to operate under a higher voltage condition, and the defects can cause certain limitation in the use of the sewage pump; thirdly, the possibility of passing larger-grain-size media is increased while the pumping force of the sewage pump is ensured, the closed impeller is used as a common impeller, and compared with the two impellers of an open impeller and a semi-closed impeller, the backwater vortex formed inside the volute is lighter, so that the output pressure generated by high-speed rotation of the impeller is maximum, namely the pumping force is strongest, but the flow channel of the closed impeller is easy to block, the grain size of the media passing through the closed impeller is minimum, and the problem to be solved is how to increase the maximum grain size of the media on the basis of ensuring the pumping force of the closed impeller. The control of the flow range and the possibility of increasing the passage of the medium with larger particle size are related to the structure of the impeller, such as the size of the inlet and outlet caliber of the impeller, the water outlet included angle of the blade, the thickness of the blade and the like.
The invention patent specification CN106895009A discloses a cutting type integrated sewage disposal submersible pump which comprises a motor main body, at least one volute and an impeller arranged in the volute, wherein blades arranged in the impeller comprise auxiliary blades, main blades and extension blades connected with the tail ends of the main blades, the tail ends of the extension blades are intersected with the tail ends of the auxiliary blades, the main blades, the auxiliary blades and the extension blades jointly enclose a flow limiting area, the existence of the flow limiting area prevents the mixed flow of sewage in the impeller and the volute, the water yield of the impeller is limited, meanwhile, the problem that an impeller runner is blocked due to the fact that a medium with larger specific gravity is settled on the back surface of the extension blades under the action of centrifugal force is solved, but the sewage pump is only used for extracting sewage with thinner medium, if the sewage pump is used for extracting sewage with thicker medium, the sewage suction capability is not strong due to the fact that the water inlet is too small, even if the sewage throwing capability is strong, the condition that water cannot be discharged can not appear, the effective operation of the sewage pump in a full range is realized for sewage with different lifting degrees, meanwhile, the area of the impeller is low in utilization ratio is caused by the existence of a plurality of flow limiting areas; the tail end of the central shaft of the submersible pump is provided with a cutting knife, the outer cover supporting plate arranged on the periphery of the cutting knife is provided with at least one carding knife, the cutting surface of the carding knife is matched with the outer side surface of the cutting knife to cut off the medium entering the volute, but the work for installing the carding knife is complicated and the cost is high, the medium is easily accumulated on the outer side surface of the cutting knife, and meanwhile, a channel formed between the cutting knife and the inner edge of the water inlet of the volute is easily blocked by soft medium; the impeller water inlet department is provided with the dovetailed knife, can cut the medium of impeller water inlet department and prevent to block up, but the interval between two knives of dovetailed knife is shorter, and the medium stops between two knives of dovetailed knife easily, thereby causes the circulation unsmooth influence the water yield, if the dovetailed knife loses the shearing action simultaneously, then leads to the jam of impeller water inlet easily.
Therefore, a sewage pump which not only has good efficacy in the full-lift range, can be used no matter the sewage is thick and thin, but also can further solve the hidden danger of blockage of the volute water inlet and the impeller water inlet is needed.
Disclosure of Invention
The invention aims to provide a sewage pump capable of cleaning and blocking in a full-lift range, which has good effects in a larger-lift range and can further solve the problem that the sewage pump is easy to block.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a full lift in-range dirt-removal prevent stifled sewage pump, includes motor main part, at least one volute and sets up in every the inside impeller of volute, motor main part's output shaft with the impeller is connected and drives the impeller and rotate, the impeller includes impeller antetheca, impeller back wall and at least one blade, the both ends face of blade respectively with the impeller antetheca with the relative both sides face laminating of impeller back wall sets up, the impeller antetheca is provided with the impeller water inlet, the volute is provided with the volute water inlet, the impeller water inlet peg graft in inside and be gapped between impeller water inlet outer wall and the volute water inlet inner wall of volute water inlet, its characterized in that:
A flow channel is formed between the upstream surface of each blade and the upstream surface of the blade opposite to the upstream surface of the blade, and the caliber of the water inlet end of each flow channel is larger than that of the water outlet end;
the flow channel is divided into a vacuum area, an energy storage area and a pressure relief area along the direction from the center of the impeller to the edge of the impeller, and the water outlet included angle of the energy storage area is larger than that of the vacuum area.
The advantages are that: the caliber of the water inlet end of the runner is larger than that of the water outlet end and the energy storage area in a larger space exists, the flow rate of the impeller water outlet is limited, the energy storage area in the larger space is ensured, and enough high-pressure water is flushed out of the volute water outlet at a high speed, so that the sewage pump has better efficacy in high-lift or low-lift operation.
Preferably, the back surface of the blade end is formed by connecting at least one plane and at least one curved surface in a staggered mode, and the back surface of the blade end is curved.
The advantages are that: the back surface of the blade is arranged in a mode of alternately distributing the plane curved surfaces, so that the medium in the sewage can generate oscillation fluctuation when the plane and the curved surfaces alternately flow, the medium is not easy to adhere to the back surface of the blade and flows out along with the water flow, and the blockage of the flow channel is avoided; the upstream surface of the rear part of the blade is a curved surface, so that unnecessary resistance generated in the process of accelerating the water throwing out can be avoided, and the flow rate of sewage can be reduced.
Preferably, each of said blades has a thickness of 7-14mm.
The advantages are that: the thickness of the blades in the existing sewage pump is 5-6mm, the thickness of the blades is increased, the flow of sewage is increased, and the flow channel is not easy to be blocked when a medium passes through.
Preferably, the inner wall of the volute water inlet is provided with a first built-in knife and a second built-in knife through a fixing piece, one end of the first built-in knife extends to the rear wall of the impeller along the output axial direction of the motor main body, the shearing surface of the first built-in knife faces the side surface of the output shaft of the motor main body, a gap is formed between the shearing surface of the first built-in knife and the side surface of the output shaft of the motor main body, one end of the second built-in knife extends to the rear wall of the impeller along the inner side surface of the impeller water inlet, and the shearing surface of the second built-in knife faces the inner side surface of the impeller water inlet, and a gap is formed between the shearing surface of the second built-in knife and the inner side surface of the impeller water inlet.
The advantages are that: the shearing surface of the first built-in knife is matched with the outer wall of the rotating shaft rotating at high speed to shear the medium together, so that the medium wound on the rotating shaft can be effectively removed; the cutting edge of the second built-in knife is matched with the inner wall of the impeller water inlet rotating at a high speed to shear media together, so that the blockage of the impeller water inlet is prevented, meanwhile, the second built-in knife is provided with the cutting edge facing the direction opposite to the rotation direction of the impeller, and sewage in the impeller slides out along the cutting edge, so that the second built-in knife can be prevented from generating resistance to sewage flow in the impeller.
Preferably, a third built-in knife is arranged at one end of the first built-in knife, which is close to the water inlet of the volute, and the tip of the third built-in knife points to the output shaft of the motor main body, and one end part, opposite to the tip, of the third built-in knife is clamped at the outer wall of the volute.
The advantages are that: because sewage is in vortex-like motion along with the high-speed rotation of the cutting knife, the medium in the sewage is easy to wind on the first built-in knife and the second built-in knife, the smoothness of a runner is influenced for a long time, and the vortex flowing into the water inlet of the volute can change the flow direction of vortex-like sewage entering the water inlet of the volute under the blocking of the third built-in knife.
Preferably, at least one dirt cleaning block is arranged on the end face of the impeller water inlet, and at least one dirt cleaning block is arranged on the inner wall of the impeller water inlet close to the end face.
The advantages are that: the cleaning block can avoid accumulation of media at the impeller water inlet, vortex can be formed to roll away the media if the cleaning block is a groove, and the cleaning block can drag away the media if the cleaning block is a convex block.
Preferably, a cutting knife is arranged at the water inlet of the volute, a cutting surface of the third built-in knife faces the cutting knife and forms a gap with the cutting knife, the cutting knife comprises a cutting knife main body, a plurality of auxiliary cutting knives and saw tooth parts, the cutting knife main body is positioned in the middle of the cutting knife, the plurality of auxiliary cutting knives are arranged at the outer edge of the cutting knife by taking the center of the cutting knife as a base point array, each auxiliary cutting knife outwards extends out of the saw tooth part, and the free end of an output shaft of the motor main body sequentially penetrates through the side wall of the volute, the rear wall of the impeller and the water inlet of the impeller and extends out of the water inlet of the volute to be connected with the middle of the cutting knife main body;
The edge of the cutting knife and the inner periphery of the opening end face of the volute jointly form a channel which allows sewage to circulate and has an arc-shaped edge at one end;
the edge of the cutter body is provided with an opening along the direction of penetrating into the center of the cutter body, and a bulge is arranged at the intersection of the opening and the edge of the cutter body;
the edge of the sawtooth part, which faces the outer side of the volute water inlet, is provided with sawteeth, and the diameter of a circular cutting surface formed by the top edge of the sawteeth when the saw blade rotates at a high speed is the same as the outer diameter of the volute water inlet.
The advantages are that: firstly, the shearing surface of the third built-in knife and the cutting knife rotating at high speed act together to play a role of shearing media, so that the soft media wound on the cutting knife can be cut, and the smoothness of a cutting knife runner is ensured; secondly, the third built-in knife protrudes out of the volute, and when the hard medium is clamped between the third built-in knife and the cutting knife, the hard medium which cannot be cut off can be extruded out of the volute along the third built-in knife along with the gradual decrease of the included angle between the two knives; thirdly, the high-speed rotation of the cutting knife enables sewage to enter the volute water inlet in a vortex shape, one end of the sewage flowing edge of the cutting knife is arc-shaped and can be matched with the vortex-shaped sewage, so that the sewage smoothly enters the volute water inlet, and the resistance of sewage flowing is reduced; fourthly, the medium is easy to intercept at the water inlet of the volute, and the high-speed rotating saw teeth can be matched with the annular surface of the water inlet of the volute to tear the intercepted medium, so that the blocking probability of the water inlet of the volute is reduced; fifthly, the cutting knife rotates on the cutting surface of the third built-in knife, so that the medium is easily accumulated on the surface of the third built-in knife, and the sewage passes through the arranged opening to form vortex so as to wash away the medium accumulated on the surface of the third built-in knife; sixth, after the strip-shaped opening is arranged, the water inflow of the runner where the strip-shaped opening is located is increased compared with that of other runners, the flow of the cutting knife is uneven, and the major arc-shaped bulge can play a role in preventing the water inflow from increasing, so that the water inflow of each runner is balanced.
Preferably, a plurality of first protruding blocks are arranged on the end face of the water inlet of the volute, the first protruding blocks are located in the middle of the water inlet of the volute and the cutting knife, a gap is formed between the first protruding blocks and the cutting knife, a plurality of second protruding blocks are arranged on the side wall of the volute, provided with the water inlet of the volute, of which the center is the output shaft of the motor body, and a gap is formed between the second protruding blocks and the outer wall of the water inlet of the volute.
The advantages are that: firstly, medium accumulation exists in a gap between a cutting knife rotating at a high speed and the end face of a water inlet of a volute, and sewage can form vortex flow due to the blocking of the first lug after the first lug is arranged, so that the medium between the gap is rolled away; and secondly, the first lug is matched with the auxiliary cutting knife and the second lug to cut off the medium entering the water inlet of the volute.
Preferably, the side surface of the back of the cutter, which is away from the water outlet of the volute, is provided with at least two convex stem cutters which are annularly arrayed by taking the center of the cutter as a base point, and the first end part of each convex stem cutter is fixed at the center of the cutter and rotates at the same speed along with the cutter;
the bending direction of the upstream surface of each convex stem cutter is opposite to the rotating direction of the cutter, and the upstream surface of the second end of each convex stem cutter is flush with the edges of the cutter main body and the auxiliary cutters at the corresponding positions.
The advantages are that: the convex peduncles can enable the flexible medium covered on the outer side surface of the cutting knife to generate fluctuation, thereby being beneficial to the separation of the softer medium from the cutting knife; the convex stem knife can stir the hard medium blocked on the runner of the cutting knife, and the rapid cutting is performed after the cutting point is found; the bending direction of the upstream surface of the convex stem cutter is opposite to the rotation direction of the cutter, and the upstream surface of the second end part of the convex stem cutter is flush with the edge of the main cutter and the edge of the auxiliary cutter at the corresponding positions, so that the resistance to sewage flow can be reduced, and meanwhile, the medium accumulated at the intersection of the upstream surface of the convex stem cutter and the outer side surface of the cutter can be flushed by high-speed water flow.
Preferably, a water cutting port is arranged on the outer wall of each volute, a water accumulating shell is covered above the water cutting port, a volute water outlet is arranged on the side surface of the water accumulating shell, a notch is formed in the edge of the bottom end of the volute water outlet, the edge of the notch is tangential to the edge of the corresponding opening, and the side wall of the water accumulating shell where the volute water outlet is positioned is level with the outer wall of the volute at the corresponding position;
a diversion shell is arranged between two adjacent vortex shells, the diversion shell is buckled on the outer wall of the vortex shell positioned in front of the sewage flowing direction, a vortex shell water outlet is buckled in the diversion shell, the diversion shell consists of a water inlet shell and a water outlet shell, the water inlet shell is arranged opposite to the vortex shell water outlet, the water outlet shell is provided with a diversion shell water outlet, and a vortex shell water inlet positioned behind the diversion shell along the sewage flowing direction is connected with the diversion shell water outlet.
The advantages are that: because the specific gravity of the medium is larger, the medium can reach the volute water outlet earlier than water when being flushed out along with water, and the edge of the bottom end of the volute water outlet is provided with a notch, so that the medium can reach the volute water outlet earlier by one step, even if the medium hung at the notch is flushed out of the volute water outlet by the continuous forward power of the water flow at the back, and the blockage at the volute water outlet is avoided.
The invention has the following advantages: the invention discloses a sewage pump capable of cleaning and blocking in a full lift range, which comprises a motor main body, at least one volute and an impeller arranged in each volute, wherein at least one blade is arranged in the impeller, a flow passage is formed between the upstream surface of the blade and the upstream surface of the opposite blade, and the caliber of a water inlet end of each flow passage is larger than that of a water outlet end; each runner is divided into a vacuum area, an energy storage area and a pressure relief area, and the water outlet included angle of the energy storage area is larger than that of the vacuum area; the caliber of the water inlet end of the runner is larger than that of the water outlet end and the energy storage area in a larger space exists, the flow rate of the impeller water outlet is limited, the energy storage area in the larger space is ensured, and enough high-pressure water is flushed out of the volute water outlet at a high speed, so that the sewage pump has better efficacy in high-lift or low-lift operation.
The first built-in knife and the second built-in knife are arranged at the impeller water inlet, the shearing surface of the first built-in knife is matched with the output shaft of the motor main body rotating at a high speed for shearing, so that the medium wound on the rotating shaft can be effectively removed, and the cutting edge of the second built-in knife is matched with the inner wall of the impeller water inlet rotating at a high speed for shearing, so that the medium blocked at the impeller water inlet can be effectively removed; at least one cleaning block is arranged on the end face of the impeller water inlet, and at least one cleaning block is arranged on the inner wall of the impeller water inlet close to the end face, so that a medium at the impeller water inlet can be rolled or dragged away; a third built-in knife is arranged at one end of the first built-in knife, a cutting knife is arranged at the water inlet of the volute, and the cutting knife is matched with the third built-in knife to cut a medium entering the water inlet of the volute, so that the water inlet of the volute is prevented from being blocked; at least one first lug is arranged on the end face of the water inlet of the volute, and the top surface of each first lug is matched with the saw teeth arranged on the universal cutter to cut the medium; the edge of the bottom end of the volute water outlet is provided with a notch, so that a medium with larger specific gravity can reach the water outlet one step earlier than water flow, and the water flow can wash away the medium hung at the notch, thereby avoiding the blockage of the volute water outlet; the device can avoid the blockage and winding of the volute water inlet, the impeller water inlet, the motor main body output shaft and the volute water outlet of the sewage pump, and ensure the normal operation of the sewage pump.
Drawings
Fig. 1 is a schematic structural diagram of two sewage pumps connected in series according to embodiment 1 of the present invention.
Fig. 2 is a schematic view showing the structure of a volute water-cutting port and a water-collecting housing in embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of a flow guiding housing in embodiment 1 of the present invention.
Fig. 4a is a schematic structural diagram of inlet and outlet apertures and respective outlet angles of an impeller having a blade in embodiment 1 of the present invention.
FIG. 4b is a schematic view of the flow channel with a vane in embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of a first inner cutter according to embodiment 1 of the present invention.
Fig. 6 is a schematic structural view of a second inner cutter according to embodiment 1 of the present invention.
Fig. 7 is a diagram showing the positional relationship of the first internal blade, the second internal blade, and the impeller water inlet in example 1 of the present invention.
Fig. 8 is a schematic view showing the structure of the third built-in knife and the water inlet of the scroll in embodiment 1 of the present invention.
Fig. 9 is a schematic diagram of the structure of the knife according to embodiment 1 of the present invention.
Fig. 10 is an exploded view of the wankel knife, scroll inlet, first inner knife, second inner knife, and third inner knife of embodiment 1.
Fig. 11a is a schematic structural diagram of inlet and outlet calibers and included angles of each outlet of the impeller with two blades in embodiment 1 of the present invention.
Fig. 11b is a schematic structural view of a flow channel containing two vanes in embodiment 1 of the present invention.
Fig. 12a is a schematic structural diagram of inlet and outlet calibers and respective outlet angles of an impeller having three blades in embodiment 1 of the present invention.
Fig. 12b is a schematic view of the structure of a runner with three vanes in embodiment 1 of the present invention.
Detailed Description
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1 and 2, the sewage pump with full lift for cleaning and blocking prevention disclosed in this embodiment includes a motor main body 1, two scroll cases 2, an impeller 3 disposed inside each scroll case 2, and a guide casing 4 disposed between the two scroll cases 2. The volute 2 comprises a volute front wall 24, a volute rear wall and volute side walls with two ends respectively connected to the peripheries of the two opposite side surfaces of the volute front wall 24 and the volute rear wall, a volute water inlet 21 is formed in the volute front wall 24, and a cutter is arranged at the volute water inlet 21, and in the embodiment, the cutter is a Chinese character 'wan' cutter 9. The side wall of the volute 2 is provided with a water cutting port 22, a water collecting shell 23 is covered above the water cutting port 22, the side wall of the water collecting shell 23 is provided with a volute water outlet 231, and the side surface of the volute water outlet 231 of the water collecting shell 23 is coplanar with the volute rear wall. The impeller 3 comprises an impeller front wall 31, an impeller rear wall and a blade 32, wherein two end surfaces of the blade 32 are respectively attached to two opposite side surfaces of the impeller front wall and the impeller rear wall, the impeller front wall is provided with an impeller water inlet 33, the impeller water inlet 33 is inserted into the volute water inlet 21, and a gap is formed between the outer wall of the impeller water inlet 33 and the inner wall of the volute water inlet 21. The motor main body 1 is positioned at one end of the sewage disposal pump, the free end of the output shaft 11 of the motor main body penetrates through the rear wall of each volute in sequence, the rear wall of the volute, the impeller water inlet 33 and extends to the outside of the volute water inlet 21 to be connected with the middle part of the Chinese character 'wan' shaped knife 9. As shown in fig. 3, the diversion housing 4 is composed of a water inlet housing 41 and a water outlet housing 42, the diversion housing 4 is buckled on the rear wall of the scroll positioned at the front along the sewage flowing direction and buckled with the scroll water outlet 231, the water inlet housing 41 is arranged opposite to the scroll water outlet 231, the water outlet housing 42 is provided with a diversion housing water outlet 421, and the scroll water inlet 21 of the scroll positioned at the rear of the diversion housing 4 along the sewage flowing direction is connected with the diversion housing opening 421. The output shaft 11 of the motor main body 1 passes through a plurality of scroll cases 2 and a guide case water outlet 421 arranged on the water outlet case of the guide case 4 between the two scroll cases 2, and the free end of the output shaft 11 of the motor main body 1 is connected with the center of a Chinese character 'wan' shaped knife 9 arranged on the scroll case at the forefront end along the flowing direction of sewage. The flow direction of the sewage is as follows: the volute water inlet 21, the impeller water inlet 33, the impeller water outlet, the volute water outlet 321, the guide shell water outlet 421 which are positioned at the front end along the sewage flow direction and the volute water inlet 21 which are positioned at the rear end along the sewage flow direction reciprocate in this way, and sewage finally flows out from the volute water outlet 321 which is positioned at the rear end along the sewage flow direction.
As shown in fig. 4a, along the rotation direction of the impeller, the surface of the impeller, from which water is thrown out along the blades 32 due to centrifugal force is called an upstream surface, the surface of each blade 32, which is away from the upstream surface, is called a downstream surface, a flow passage is formed between the upstream surface of the blade 32 and the downstream surface of the opposite blade 32, and the blade 32 has an involute spiral structure around the center of the impeller 3 and has a flow passage. Taking the center of the impeller as the center of a circle and taking the inlet point from the center of the impeller to the head end of the blade 32 as the radius to form a circle, wherein the diameter of the drawn circle is the inlet end caliber a of the flow channel, the outlet end caliber b of the flow channel is the nearest distance from the outlet point of each blade 32 to the upstream surface of the blade 32 opposite to the outlet point, and the outlet end caliber b of the flow channel is smaller than the inlet end caliber a of the flow channel to play a role in limiting the flow of the water outlet of the flow channel 34.
As shown in fig. 4a, 4b, the blade 32 comprises a blade front portion, a blade middle portion and a blade rear portion, the blade front portion intersects at the center of the impeller, the tail end of the blade front portion is connected with the head end of the blade middle portion, and the tail end of the blade middle portion is connected with the head end of the blade rear portion. The front starting point c of each blade 32 is the water inlet point at the head end of each blade, and the front end point is the intersection point of the connecting line of the center of the impeller and the water outlet point of the blade closest to the blade and the blade 32; the middle starting point d of the blade is the front end point of the blade, and the middle end point of the blade is the intersection point of the extension line of the connecting line of the center of the impeller and the front starting point c of the blade 32 and the blade 32 The method comprises the steps of carrying out a first treatment on the surface of the The rear starting point e of each blade is the middle end point of the blade, and the rear end point of the blade is the tail end water outlet point f of the blade. The flow channel 34 of the blade is divided into a vacuum area g, an energy storage area h and a pressure relief area i in sequence along the direction from the center of the impeller to a water outlet, by a connecting line between the center of the impeller and a front starting point c, a connecting line between the center of the impeller and a middle starting point d of the blade, a connecting line between the center of the impeller and a rear starting point e of the blade and a connecting line between the center of the impeller and a tail water outlet point f of the blade. The water outlet included angle alpha of the vacuum area g 1 Refers to the included angle alpha between the connecting line between the center of the impeller and the front starting point c and the connecting line between the center of the impeller and the middle starting point d of the blade, and the included angle alpha of the energy storage area h 2 Refers to the included angle between the line between the center of the impeller and the middle starting point d of the blade and the line between the center of the impeller and the rear starting point e of the blade. The water outlet included angle alpha of the energy storage area h 2 An included angle alpha of water outlet larger than the vacuum area g 1 The energy storage area h with enough space and enough high-pressure water are ensured.
As shown in fig. 4a and 4b, the vacuum area g of each flow channel 34 is formed by instantly throwing out sewage from the impeller water inlet 33 under the high-speed rotation of the impeller to form a negative pressure vacuum area g, the sewage can quickly enter the vacuum area g and form vortex together with the water entering from the impeller water inlet due to the formation of the vacuum area g, the vortex and the negative pressure action of the vacuum area g can quickly suck the water into the energy storage area h, meanwhile, the sewage cannot be completely and timely discharged due to the fact that the water inlet end caliber a of each flow channel 34 is larger than the water outlet end caliber b, accumulation is formed in the energy storage area h to form high-pressure water, the energy storage area h realizes the process of converting the kinetic energy of the sewage into the potential energy, the sewage in the energy storage area h generates high-pressure water due to the vacuum action and the vortex action, the potential energy of the high-pressure water is reconverted into the kinetic energy, the water can be thrown out of the energy storage area h at a speed higher than the water inlet end of the energy storage area h due to the high-pressure action of the energy storage area h, and the sewage can be discharged from the water outlet end of the flow channel 34 at a higher speed to the water outlet end of the flow channel at a higher height even if the water can be normally discharged at a high lift.
Limiting the flow of sewage and the energy storage area has a large enough space and storing enough high pressure water has the following advantages: firstly, the sewage pump has better efficiency in the high-lift stage, the caliber a of the water inlet end of the runner 34 of most low-lift sewage pumps is smaller than the caliber b of the water outlet end, if the sewage pump is used in the high-lift operation, sewage reversely flows back into the volute under the action of gravitational potential energy to generate high-pressure water in the volute, the high-pressure water in the volute continuously presses the sewage back to the vacuum region g to cause the loss of the vacuum region g in the impeller, the loss of the vacuum region g and the larger caliber b of the water outlet end cause no high-pressure water, namely no sewage with high flow velocity, so that the phenomenon that the water outlet is little or cannot be generated in the high-lift stage cannot reach the required height occurs. The design of the invention has the advantages that the caliber b of the water outlet end is smaller than the caliber a of the water inlet end and the high-pressure water stored in the energy storage area h can effectively prevent the high-pressure water in the volute 2 from entering the impeller 3, the high-pressure water in the energy storage area h is reserved, and a sufficient amount of high-pressure water is converted from potential energy to kinetic energy and rushed to the water outlet at a higher flow rate, so that the normal water outlet under high lift is ensured; secondly, the sewage pump has better efficiency in the low-lift stage, and most of the high-lift sewage pumps at present can increase the sewage yield if being used for the low-lift, new sewage sources continuously flow into the impeller 3, and the sewage pump can continuously work, so that overload of the sewage pump and even damage of a motor can be caused. The sewage pump in the invention has the energy storage area h, so that the flow of sewage is limited, the sewage can not continuously flow into the impeller 3, and overload caused by excessive work of the sewage pump is avoided, therefore, the existence of the energy storage area g which is large enough and the caliber b of the water outlet end of the runner 34 is smaller than the caliber a of the water inlet end, and the sewage pump is ensured to have good working efficiency in both high-lift and low-lift. Thirdly, the thickness of the blade 3 can be increased, the thickness of the blade 3 in the prior art is only 5-6mm, the thickness e of each blade 3 in the invention is 7-14mm, the flow rate of sewage is increased, and the flow channel 34 is not easy to be blocked when a medium passes through. If the thickness of the blade 3 is increased, the flow rate of sewage is increased, and the load of the sewage pump is increased, but due to the existence of the energy storage area h, the sewage pump plays a temporary buffering role on the sewage, so that the load of the sewage pump is reduced in unit time by relatively acting sewage, and the part of the load of the sewage pump reduced by the energy storage area h can just compensate the part of the load of the sewage pump increased due to the increase of the thickness of the blade 3, thereby ensuring that the water pump does not overload and solving the problem that the flow channel 34 is easy to be blocked when a medium passes. Fourth, can be used to extract the sewage with different concentration and dilution degree, because the thickness of the flow channel 34 is widened, the medium with larger particle size can be ensured to pass through, and the blockage of the flow channel 34 is effectively prevented.
As a preferred embodiment in the present embodiment, the back surface of the rear part of the blade is formed by connecting at least one plane and at least one curved surface in a staggered manner, and the back surface of the rear part of the blade is curved. Under the action of centrifugal force, the medium with heavy specific gravity is not easy to adhere to the upstream surface due to the high-speed rotation of the impeller 3 and the high flow rate of high-pressure water, but the medium with heavy specific gravity on the downstream surface of the blade is easy to adhere due to the slow down of the flow rate of water, the blockage of the flow channel 34 is easy to be caused over time, the downstream surface of the blade is arranged in a mode of alternately distributing planar curved surfaces, the medium in sewage can vibrate and fluctuate due to the alternation of the planar surfaces and the curved surfaces, so that the medium is not easy to adhere to the downstream surface and flows out along with the water, and the upstream surface of the rear part of the blade is curved, and unnecessary resistance is avoided to be generated in the process of accelerating the water throwing out so as to reduce the flow rate of sewage.
As shown in fig. 5 and 7, the first and second inner blades 5 and 6 are mounted on the inner wall of the volute inlet 21 by the fixing member 8, the first inner blade 5 is composed of a first extension portion 51 and a first fixing portion 52, the first end face of the first extension portion 51 faces the inside of the impeller, the second end face of the first extension portion 51 is completely attached to the first end face of the first fixing portion 52, and the second end face of the first fixing portion 52 faces the volute inlet 21. The fixing member 8 for mounting the first inner blade 5 includes a curved engaging portion 81 and a screw, the tip of the screw is welded to the convex surface of the engaging portion 81, and the engaging portion 81 is fixed to the inner wall of the scroll water inlet 21 by the screw. The first fixing portion 52 is provided with a first through groove 521 on a side surface thereof, the engaging portion passes through the first through groove 521 to mount the first inner cutter 5 on the concave surface of the engaging portion 81, a side surface of the first extending portion 51 is gradually curved to be a cambered surface along a direction close to the first fixing portion 52 and intersects with a side surface of the first fixing portion 52 where the first through groove 521 is formed, a plane of the first extending portion 51 opposite to the cambered surface and a plane of the first fixing portion 52 opposite to the side surface where the first through groove 521 is formed to be coplanar and jointly form a shearing surface of the first inner cutter 5, the shearing surface of the first inner cutter 5 faces the side surface of the output shaft 11 of the motor main body 1 and forms a gap therebetween, and the first extending portion 51 extends to the impeller 3 inside along the output shaft 11 to the impeller rear wall. The shearing surface of the first inner cutter 5 acts together with the outer wall of the output shaft 11 rotating at a high speed to shear the medium, so that the medium wound on the output shaft 11 can be effectively removed.
As shown in fig. 6 and 7, the second inner cutter 6 is composed of a second extending portion 61 and a second fixing portion 62, the first end face of the second extending portion 61 faces the inside of the impeller, the second end face of the second extending portion 61 is attached to the first end face of the second fixing portion 62, the second end face of the second fixing portion 62 faces the volute inlet 21, the second fixing portion 62 and the second extending portion 61 are both curved, and the curvature of the second extending portion are the same as the curvature of the inner wall of the impeller. The fixing member 8 for mounting the second inner blade 6 is a screw, which is welded to the convex surface of the second fixing portion 62, and the second inner blade 6 is fixed to the inner wall of the scroll by the screw. The side of the second extension portion 61 facing the inner wall of the impeller is coplanar with the side of the second fixing portion 62 facing the inner wall of the impeller, the surface of the second extension portion 62 opposite to the inner wall of the impeller is referred to as a shearing surface of the second internal blade 6, the shearing surface of the second internal blade 6 is opposite to the inner side of the impeller water inlet 33 and forms a gap, and the first end of the second extension portion 61 extends to the impeller rear wall along the inner side of the impeller water inlet facing the inside of the impeller. The second extension 61 is provided with a blade, and the blade of the second built-in knife 6 works together with the inner wall of the impeller water inlet 33 rotating at a high speed to play a role of shearing media, so that the media blocked at the impeller water inlet 33 can be effectively removed, and the blockage of the impeller water inlet 33 is prevented. The second extension portion 61 is provided with the cutting edge, and the second extension portion 61 is arranged in the impeller to generate a certain resistance to sewage flow in the impeller, the impeller rotates at a high speed to drive sewage in the impeller to rotate in the same direction, and the sewage can slide out along the cutting edge after flowing to the cutting edge at a high speed, so that the resistance of the second extension portion 61 to sewage flow is reduced.
As shown in fig. 5, 7 and 8, the third inner blade 7 having a right-angle triangle configuration is welded to the top of the second end of the first fixing portion 52 of the first inner blade 5. The sharp angle vertex of the right-angle triangle configuration is defined as the tip of the third built-in knife 7, the tip of the third built-in knife 7 points to the output shaft 11, a second through groove 211 is formed in the end face of the volute water inlet 21, one end part of the tip of the third built-in knife 7 penetrates through the second through groove 211 to protrude out of the volute outer wall, a blocking protruding block 71 is arranged on the part, facing the side face of the first built-in knife 5, of the third built-in knife 7, protruding out of the volute outer wall, and the blocking protruding block 71 is clamped at the volute outer wall to play a role in fixing the third built-in knife 7.
As shown in fig. 7, a plurality of dirt cleaning blocks 331 are disposed at the impeller water inlet 33, the dirt cleaning blocks 331 are grooves 3311 or dirt cleaning projections 3312, five dirt cleaning projections 3312 are uniformly distributed on the end face of the impeller water inlet 33, 5 grooves 3311 are uniformly distributed on the inner wall of the impeller water inlet 33 near the end face, and the grooves 3311 penetrate through the end face of the impeller water inlet 33. The principle of the groove 3311 is that when sewage passes through the groove 3311, a vortex is formed, the centrifugal force of the formed vortex can suspend impurities and then be carried away by the sewage flowing fast, and the principle of the cleaning bump 3312 is that the cleaning bump 3312 rotates at a high speed along with the impeller 3 to drag off a medium. At least one cleaning block 331 is disposed on the impeller water inlet end face and the impeller water inlet inner wall, and the cleaning block 331 at each position can be a groove 3311 or a cleaning protrusion 3312, but if the groove 3311 is disposed on the impeller water inlet end face, the groove 3311 is large enough and deep enough to ensure the formation of vortex. The cleaning block 331 disposed at the impeller water inlet can remove the medium accumulated at the junction of the first extension part 51 and the first fixing part 52 of the first built-in knife 5 and the junction of the second extension part 61 and the second fixing part 62 of the second built-in knife 6, and can effectively remove the impurities accumulated at the impeller water inlet 33.
As shown in fig. 9, a universal cutter 9 is disposed at the water inlet of the scroll, a square main body 91 is disposed in the middle of the universal cutter 9, each right angle of the square main body 91 is bent clockwise along the extending direction of a right angle side to form auxiliary cutters 92, four auxiliary cutters 92 are arranged at four corners of the square main body 91, and each auxiliary cutter 92 extends out of a saw tooth portion 93 along the clockwise direction. An edge of the auxiliary knife 92 is a semicircular edge, the semicircular edge is tangential to the edge of the adjacent main body 91 and the edge of the sawtooth part 93, and the edge of the universal knife 9 and the inner periphery of the end face of the volute water inlet 21 jointly form a channel 94 for allowing sewage to enter. The square main body 91 is used in cooperation with the third built-in knife 7, the triangular side surface of the third built-in knife 7 opposite to the Chinese character 'wan' knife 9 is called a cutting surface of the third built-in knife 7, the third built-in knife 7 is provided with a cutting edge, and a gap is formed between the cutting surface of the third built-in knife 7 and the main body 91. The provision of the third built-in knife 7 has the advantage that: firstly, as sewage makes vortex-like motion along with the high-speed rotation of the ten-thousand-shaped knife 9, the medium in the sewage is easy to wind on the first built-in knife 5 and the second built-in knife 6, and the smoothness of the channel 94 is influenced for a long time, so that the third built-in knife 7 is arranged near the ten-thousand-shaped knife 9, and the flow direction of vortex-like sewage entering the ten-thousand-shaped knife 9 can be changed; second, the third built-in knife 7 and the edge of the main body 91 rotating at high speed act together to cut the medium, so that the soft medium wound on the universal knife can be cut, and the smoothness of the universal knife runner is ensured; third, when the hard medium is caught between the third inner cutter 7 and the edge of the main body 91, the hard medium which cannot be cut off is extruded out of the scroll 2 along the edge of the third inner cutter 7 as the angle between the two is gradually reduced. The high-speed rotation of the universal cutter 9 allows sewage to enter the volute water inlet 21 in a vortex shape, and the semicircular edge at one end of the runner of the universal cutter 9 can be matched with the vortex-shaped sewage, so that the sewage smoothly enters the volute water inlet 21, and the resistance of sewage flow is reduced.
As shown in fig. 9, at least two convex stem cutters 95 are annularly arranged on the outer side surface of the universal stem cutter 9, which faces away from the volute water outlet 21, with the center of the universal stem cutter 9 as a base point, the first end part of each convex stem cutter 95 is fixed at the center of the universal stem cutter 9 and rotates at the same speed along with the universal stem cutter 9, the surface of each convex stem cutter 95, which is thrown out by water under the centrifugal force along the rotation direction of the universal stem cutter 9, is called the upstream surface of the convex stem cutter 95, the surface facing away from the upstream surface of the convex stem cutter 95 is called the upstream surface of the convex stem cutter 95, the bending direction of the upstream surface of the convex stem cutter 95 is opposite to the rotation direction of the universal stem cutter 9, and the upstream surface of the second end part of the convex stem cutter 95 is flush with the edge of the main body cutter 91 and the edge of the auxiliary cutter 92 at the corresponding position. The function of the male stem knife 95 is as follows: firstly, for the easily rolling blocky medium, the cutting point of the blocky medium is difficult to cut, and the blocky medium is accumulated to block the volute water inlet 21 for a long time, the blocky medium can be rapidly stirred by the convex peduncles 95 when the blocky medium rotates, so that the cutting point of the blocky medium is found by the blocky medium 9, and the cutting probability is increased; secondly, for soft media such as plastics, the soft media are easy to cover the outer side surface of the universal cutter or wind on the universal cutter 9 to block the rotation of the universal cutter 9 and prevent sewage from flowing into the volute, and the rotation of the convex stem cutter 95 can enable the soft materials to fluctuate on the convex stem cutter, so that the soft materials are helped to separate from the universal cutter; thirdly, the bending direction of the upstream surface of the convex stem cutter 95 is opposite to the rotation direction of the universal cutter 9, the upstream surface of the second end of the convex stem cutter 95 is flush with the edge of the main cutter 91 and the edge of the auxiliary cutter 92 at the corresponding positions, so that the resistance to sewage flow can be reduced, meanwhile, the medium is easy to accumulate at the intersection of the upstream surface of the convex stem cutter 95 and the universal cutter side surface attached to the convex stem cutter 95, and the accumulated medium can slide down along the upstream surface of the convex stem cutter 95 by water flow of high-speed flushing.
As another preferred embodiment of the present embodiment, as shown in fig. 9, a strip-shaped opening 96 is formed on one right-angle side of the v-shaped blade 9 along the direction extending into the center of the v-shaped blade 9, because the rotation of the v-shaped blade 9 on the cutting surface of the third internal blade 7 easily causes the cutting surface of the third internal blade 7 to accumulate the medium, and the sewage passes through the provided strip-shaped opening 96 to form a vortex to wash away the medium accumulated on the surface of the third internal blade 7. The intersection of the strip-shaped opening 96 and the edge of the main body 91 of the square cutter is provided with the major arc-shaped protrusion 97, as the strip-shaped opening 96 is arranged on one right-angle edge of the main body 91 of the square cutter, the water inflow of the runner where the strip-shaped opening 96 is positioned is increased compared with that of other runners, the flow of the volute water inlet 21 is not uniform, and the major arc-shaped protrusion 97 plays a role in preventing the water inflow from increasing, so that the water inflow of each runner is balanced.
As shown in fig. 10, if the end face of the volute water inlet 21 is attached to the w-shaped cutter 9, the w-shaped cutter 9 will wear the volute water inlet 21 and the w-shaped cutter 9 due to the high-speed rotation, if the end face of the volute water inlet 21 and the w-shaped cutter 9 form a gap, although wear can be avoided, the medium will rotate along with the w-shaped cutter 9 at a high speed between the gaps formed by the two, and the medium at the gap will accumulate, so that a plurality of first protrusions 212 are uniformly arranged on the end face of the volute water inlet 21, the first protrusions 212 are positioned between the volute water inlet 21 and the w-shaped cutter 9, a gap is formed between the first protrusions 212 and the w-shaped cutter 9, the top face of the first protrusions 212 and the cutting face of the third built-in cutter 7 are coplanar, a plurality of second protrusions 213 are arranged on the volute front wall 24 by taking the output shaft 11 of the motor body as a center, and gaps are formed between the second protrusions 213 and the outer wall of the volute water inlet. The first bump 212 functions as follows: first, the sewage forms a vortex due to the blocking of the first bump 212 when passing through the first bump 212, and the medium remaining between the gaps is rolled away; secondly, the auxiliary cutter 92 acts on the surface of the first bump 212 towards the outer edge of the volute to cut off the medium hung on the first bump 212; thirdly, the medium is easy to intercept at the position of the volute water inlet 21, and the high-speed rotating saw teeth can be matched with the first convex blocks 212 to tear the medium, so that the probability of blocking the volute water inlet 21 is reduced; fourth, the second bump 213 forms a gap with the top surface of the serration in the serration 93 rotating at high speed, and the opposite sides of the two cooperate with each other to shear the medium.
As another preferred embodiment of this embodiment, as shown in fig. 2, the edge of the bottom end of the volute water outlet 231 on the water collecting housing 23 is provided with a notch 2311, the edge of the notch 2311 is tangential to the edge of the connected volute water outlet 231, and the medium can reach the water outlet earlier than water when rushing out with water due to the larger specific gravity, and the notch 2311 is provided at the edge of the bottom end of the volute water outlet 231, so that the medium can reach the water outlet earlier by one step, and even if the medium is hung at the notch 2311, the medium can be rushed out of the volute water outlet 231 by the continuous forward power of the following water flow, thus avoiding the blockage at the volute water outlet 231.
In the invention, the number of the scroll is not limited to two, a plurality of the scroll can be connected, when the scroll is connected in series, the scroll 2 positioned at the rear along the sewage flow direction can be provided with no universal cutter 9 and no third built-in cutter 7, because the front scroll has removed enough medium, the medium reaching the inside of the rear scroll 2 is small, and the probability of blocking the scroll 2 is small.
Example 2
As shown in fig. 11a and 11b, another sewage pump for cleaning sewage in the full lift range provided in this embodiment has substantially the same structure as that of embodiment 1, and only the different parts will be described below.
In this embodiment, the impeller 3 has two blades 32, and two flow passages are annularly arranged with the center of the impeller 3 as a base point. The center of the impeller is taken as the center of a circle, and the water inlet point from the center of the impeller to the head end of the blade 32 is taken as the radius to form a circle, so that the water inlet points of the two blades fall on the circumference, and the water inlet end caliber a of each flow passage refers to the distance between the water inlet points of the two blades 32. The outlet end caliber b of each flow passage refers to the nearest distance from the outlet point of each blade 32 to the upstream surface of the blade opposite to the outlet point. The water outlet included angle of the vacuum area is alpha 3 The water outlet included angle of the energy storage area is alpha 4 。
Example 3
As shown in fig. 12a and 12b, another sewage pump for cleaning sewage in the full lift range provided in this embodiment has substantially the same structure as that of embodiment 1, and only the different parts will be described below.
In this embodiment, the vanes 32 in the impeller 3 have three flow passages which are arrayed in a ring shape with the center of the impeller 3 as a base point. The center of the impeller is taken as the center of a circle, and the water inlet point from the center of the impeller to the head end of the blade 32 is taken as the radius to form a circle, so that the water inlet points of the three blades all fall on the circumference, and the water inlet end caliber a of each flow passage refers to the distance between the water inlet points of two adjacent blades 32. The outlet end caliber of each flow passage refers to the nearest distance from the outlet point of each blade 32 to the upstream surface of the blade opposite to the outlet point. The water outlet included angle of the vacuum area is alpha 5 The water outlet included angle of the energy storage area is alpha 6 。
Therefore, under the condition that the water inlet caliber of the impeller and the distance from the water inlet point of each blade to the center of the impeller are the same, the fewer the number of the blades, the more the water inlet end caliber a of each runner is ensured to be larger than the water outlet end caliber b, the water outlet included angle of the energy storage area g is larger than the water outlet included angle of the vacuum area h, and the better effect of limiting the flow is achieved.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (7)
1. The utility model provides a full lift in-range sewage pump that prevents that decontaminates, includes motor main part (1), at least one volute (2) and sets up in every inside impeller (3) of volute (2), motor main part's output shaft (11) with impeller (3) are connected and drive impeller (3) and rotate, impeller (3) are including impeller antetheca (31), impeller back wall and at least one blade (32), the both ends face of blade (32) respectively with impeller antetheca (31) with the laminating of the opposite both sides face of impeller back wall sets up, impeller antetheca (31) are provided with impeller water inlet (33), volute (2) are provided with volute water inlet (21), impeller water inlet (33) peg graft in inside volute water inlet (21) and be gapped between impeller water inlet (33) outer wall and the inner wall of volute water inlet (21), its characterized in that:
A flow passage (34) is formed between the upstream surface of each blade and the upstream surface of the blade opposite to the upstream surface of the blade, and the caliber a of the water inlet end of each flow passage (34) is larger than the caliber b of the water outlet end;
the flow channel (34) is divided into a vacuum region g, an energy storage region h and a pressure relief region i along the direction from the center of the impeller to the edge of the impeller, and the water outlet included angle of the energy storage region h is larger than that of the vacuum region g;
the back surface of the tail end of the blade (32) is formed by connecting at least one plane and at least one curved surface in a staggered mode, and the back surface of the tail end of the blade (32) is curved;
the inner wall of the volute water inlet (21) is provided with a first built-in knife (5) and a second built-in knife (6) through a fixing piece, one end of the first built-in knife (5) extends to the rear wall of the impeller along the output shaft (11) of the motor main body, the shearing surface of the first built-in knife (5) faces the side surface of the output shaft (11) of the motor main body, a gap is formed between the shearing surface of the first built-in knife (5) and the side surface of the output shaft (11) of the motor main body, one end of the second built-in knife (6) extends to the rear wall of the impeller along the inner side surface of the impeller water inlet, and the shearing surface of the second built-in knife (6) faces the inner side surface of the impeller water inlet and forms a gap between the shearing surface of the second built-in knife (6) and the inner side surface of the impeller water inlet; one end of the first built-in knife (5) close to the volute water inlet (21) is provided with a third built-in knife (7), the tip of the third built-in knife (7) points to the output shaft (11) of the motor main body, and one end part, opposite to the tip, of the third built-in knife (7) is clamped at the volute outer wall.
2. The full lift in-range sewage pump for cleaning and blocking prevention according to claim 1, wherein: the thickness of each blade (32) is 7-14mm.
3. The full lift in-range sewage pump for cleaning and blocking prevention according to claim 1, wherein: at least one dirt cleaning block (331) is arranged on the end face of the impeller water inlet, and at least one dirt cleaning block (331) is arranged on the inner wall of the impeller water inlet close to the end face.
4. The full lift in-range sewage pump for cleaning and blocking prevention according to claim 1, wherein:
the cutting device comprises a volute water inlet (21), a third built-in cutter (7), a cutting blade, a plurality of auxiliary cutters and saw teeth, wherein the cutting surface of the third built-in cutter faces the cutting blade and forms a gap with the cutting blade;
The edge of the cutting knife and the inner periphery of the opening end face of the volute jointly form a channel which allows sewage to circulate and has an arc-shaped edge at one end;
the edge of the cutter body is provided with an opening along the direction of penetrating into the center of the cutter body, and a bulge is arranged at the intersection of the opening and the edge of the cutter body;
the edge of the sawtooth part, which faces the outer side of the volute water inlet, is provided with sawteeth, and the diameter of a circular cutting surface formed by the top edge of the sawteeth when the saw blade rotates at a high speed is the same as the outer diameter of the volute water inlet.
5. The full lift in-range sewage pump of claim 4, wherein: be provided with a plurality of first lugs (212) on the volute water inlet terminal surface, first lug (212) are located the volute water inlet and in the middle of the cutting knife, form the clearance between first lug (212) and the cutting knife, be provided with a plurality of second lugs (213) on the volute lateral wall of volute water inlet (21) with output shaft (11) of motor main part as central array, second lug (213) with form the clearance between the outer wall of volute water inlet (21).
6. The full lift in-range sewage pump of claim 4, wherein:
At least two convex stem cutters (95) are annularly arranged on the side surface of the cutter back away from the volute water outlet (231) by taking the center of the cutter as a base point, and the first end part of each convex stem cutter (95) is fixed at the center of the cutter and rotates at the same speed along with the cutter;
the bending direction of the upstream surface of each protruding peduncle knife (95) is opposite to the rotating direction of the cutting knife, and the upstream surface of the second end of each protruding peduncle knife (95) is flush with the edge of the cutting knife main body and the edge of the auxiliary cutting knife at the corresponding positions.
7. A full lift in-range sewage pump for cleaning and blocking prevention according to any one of claims 1-6, wherein:
a water cutting port (22) is formed in the outer wall of each volute, a water accumulation shell (23) is covered above the water cutting port (22), a volute water outlet (231) is formed in the side face of the water accumulation shell (23), a notch (2311) is formed in the edge of the bottom end of the volute water outlet (231), the edge of the notch (2311) is tangential to the edge of the connected volute water outlet (231), and the side wall of the water accumulation shell (23) where the volute water outlet (231) is located is leveled with the outer wall of the volute at the corresponding position;
be provided with water conservancy diversion casing (4) between the adjacent two the volute, water conservancy diversion casing (4) detain and locate on the volute outer wall in the direction of flow front of following sewage, water conservancy diversion casing (4) are including volute delivery port (231) lock, water conservancy diversion casing (4) are by casing (41) and play water casing (42) constitution, water intaking casing (41) set up with volute delivery port (231) relatively, play water casing (42) are provided with water conservancy diversion casing delivery port (421), along sewage flow direction and be located volute water inlet (21) in the direction of flow behind the water conservancy diversion casing with water conservancy diversion casing delivery port (421) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422240.9A CN108506221B (en) | 2018-05-04 | 2018-05-04 | Sewage pump capable of cleaning and blocking in full-lift range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422240.9A CN108506221B (en) | 2018-05-04 | 2018-05-04 | Sewage pump capable of cleaning and blocking in full-lift range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108506221A CN108506221A (en) | 2018-09-07 |
| CN108506221B true CN108506221B (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810422240.9A Active CN108506221B (en) | 2018-05-04 | 2018-05-04 | Sewage pump capable of cleaning and blocking in full-lift range |
Country Status (1)
| Country | Link |
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| CN (1) | CN108506221B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396111B (en) * | 2021-12-28 | 2024-02-06 | 威乐(中国)水泵***有限公司 | Sewage lifting device |
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|---|---|---|---|---|
| US3786996A (en) * | 1972-03-20 | 1974-01-22 | Tec Group | Axial flow unit |
| DE2323245A1 (en) * | 1973-05-09 | 1974-12-12 | Hebenstreit Gmbh | DEVICE FOR GENERATING HOMOGENOUS MIXTURES OF AT LEAST TWO QUANTITY MATCHED MIX COMPONENTS |
| JPS5820997A (en) * | 1981-07-29 | 1983-02-07 | Eiichi Sugiura | Manufacture of volute pump casing |
| CN204961321U (en) * | 2015-07-15 | 2016-01-13 | 台州新宏基泵业有限公司 | Double helix sewage filth submerged motor pump |
| CN205823718U (en) * | 2016-06-23 | 2016-12-21 | 上海瑞邦机械集团有限公司 | A kind of non-clogging impeller for proof submersible sand discharging pump |
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2018
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|---|---|---|---|---|
| US3786996A (en) * | 1972-03-20 | 1974-01-22 | Tec Group | Axial flow unit |
| DE2323245A1 (en) * | 1973-05-09 | 1974-12-12 | Hebenstreit Gmbh | DEVICE FOR GENERATING HOMOGENOUS MIXTURES OF AT LEAST TWO QUANTITY MATCHED MIX COMPONENTS |
| JPS5820997A (en) * | 1981-07-29 | 1983-02-07 | Eiichi Sugiura | Manufacture of volute pump casing |
| CN204961321U (en) * | 2015-07-15 | 2016-01-13 | 台州新宏基泵业有限公司 | Double helix sewage filth submerged motor pump |
| CN205823718U (en) * | 2016-06-23 | 2016-12-21 | 上海瑞邦机械集团有限公司 | A kind of non-clogging impeller for proof submersible sand discharging pump |
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| 混流泵叶轮内空化流动的数值计算;甘加业;薛永飞;吴克启;;工程热物理学报(S1);第165-168页 * |
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| Publication number | Publication date |
|---|---|
| CN108506221A (en) | 2018-09-07 |
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