A guided sewage pump

Abstract

The invention discloses a guided sewage pump, which has the advantages of large flow, high head and guided cutting by means of less cutting and more guiding. The key points of the technical scheme are that it comprises a motor, a pump top cover, a pump head, a pump bottom cover and a foot connected in sequence from top to bottom, a pump shaft is arranged in the motor, an impeller arranged in the pump head is arranged on the pump shaft, the impeller comprises an upper cover plate, a lower cover plate, and a main blade arranged between the upper cover plate and the lower cover plate, a shaft sleeve matched with the pump shaft is arranged on the upper cover plate, a water inlet ring is arranged on the lower cover plate, a plurality of lower blades are arranged on the lower surface of the lower cover plate, the main blade comprises an inner end and an outer end, a cutting knife is arranged on the inner end of the main blade, a water through hole directly facing the water inlet ring is arranged on the pump bottom cover, a guide block arranged in the water inlet ring is arranged on the upper end of the water through hole, and the invention is applicable to the technical field of sewage pumps.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage pumps, in particular to a guided sewage pump. Background Art

[0002] The cutting-type sewage pump can tear and cut long fibers, bags, belts, grass, cloth strips and other materials in sewage, and then discharge them smoothly. It is particularly suitable for conveying liquids containing hard solids, fibers, and particularly dirty, sticky, and slippery liquids. However, the sewage pumps currently on the market generally have poor cutting effects, and have disadvantages such as stalling, low head, and easy clogging. As disclosed in application number CN201610036433.1, in order to achieve the effect of no entanglement and no clogging, it adopts a semi-open impeller structure. When in use, the pump has a low head and it is difficult to meet the national standards in terms of efficiency. In addition, a cutting and grinding disc and a cutting blade need to be set at the water inlet of the base. However, in actual use, there are defects such as easy clogging and easy damage of the cutting blade. Therefore, a new design was carried out based on the above problems. Summary of the invention

[0003] The object of the present invention is to provide a guided sewage pump which utilizes a method of less cutting and more guiding to have the advantages of large flow, high head and guided cutting.

[0004] The objective of the present invention is achieved in this way: a guided sewage pump, comprising a motor, a pump top cover, a pump head, a pump bottom cover and a foot connected in sequence from top to bottom, a pump shaft is arranged in the motor, and an impeller arranged in the pump head is arranged on the pump shaft, characterized in that: the impeller comprises an upper cover plate, a lower cover plate, and a main blade arranged between the upper cover plate and the lower cover plate, a shaft sleeve adapted to the pump shaft is arranged on the upper cover plate, a water inlet ring is arranged on the lower cover plate, a plurality of lower blades are arranged on the lower surface of the lower cover plate, the main blade comprises an inner end and an outer end, a cutting knife is arranged on the inner end of the main blade, a water through hole facing the water inlet ring is arranged on the pump bottom cover, and a guide block arranged in the water inlet ring is arranged at the upper end of the water through hole.

[0005] The present invention is further configured as follows: the width of the cutting knife is smaller than the width of the main blade, the inner end of the main blade forms a side cutting edge, and the side cutting edge is axially aligned with the inner wall of the impeller ring.

[0006] The present invention is further configured as follows: the pump bottom cover is also provided with a mouth ring groove arranged around the water hole and adapted to the water inlet ring, and the inner wall of the water hole is provided with a sand leakage port connected to the mouth ring groove.

[0007] The present invention is further configured as follows: a convex ring is provided on the outer peripheral edge of the upper surface of the pump bottom cover, and an inclined flow guide surface is provided on the inner wall of the convex ring.

[0008] The present invention is further configured as follows: the pump head comprises a pump chamber of an annular structure, a sewage discharge channel tangentially connected to the pump chamber, and a guide dispersion block disposed on the connecting end of the pump chamber and the sewage discharge channel and used for guiding and dispersing sewage is provided in the pump head, and a guide channel and a dispersion channel are formed between the guide dispersion block and the cavity wall of the pump chamber

[0009] The present invention is further configured as follows: a groove-shaped flow channel is further provided on the inner wall of the pump chamber, and the groove-shaped flow channel is located in the dispersion flow channel.

[0010] The present invention is further configured as follows: the base comprises a top plate, a side isolation plate and a bottom plate connected in sequence, a plurality of outer water inlet holes are arranged on the side isolation plate, the side isolation plate is annular and surrounds a water inlet chamber, a water outlet facing the water outlet is arranged on the top plate, a bottom isolation plate is arranged in the water inlet chamber, a plurality of bottom water inlet holes are arranged on the bottom isolation plate, and a plurality of inner water inlet holes are arranged between the bottom isolation plate and the top plate.

[0011] The present invention is further configured as follows: a plurality of reinforcing ribs connected to the bottom plate are also provided on the outer wall of the side isolation plate.

[0012] The present invention is further configured as follows: an elastic washer for axial abutment is provided between the impeller and the pump shaft, and an adjusting nut for axially fixing the impeller is provided on the pump shaft.

[0013] The present invention is further configured as follows: a water thrower is disposed above the impeller on the pump shaft, the water thrower is fixedly connected to the pump shaft in the circumferential direction, and a plurality of centrifugal blades arranged equidistantly are disposed on the outer circumference of the water thrower.

[0014] The above technical solution has the following advantages: the impeller adopts a combination of centrifugal closed and open impellers, taking advantage of the high head and high efficiency of the closed and open impellers and the advantages of the open impellers being less prone to sand jam and leakage, thereby improving the efficiency of the whole machine;

[0015] The cutting knife and the guide block are used to fully cut off the dirt and quickly enter the impeller. The ring groove, the sand leakage port and the guide surface are used to prevent leakage and sand jam.

[0016] The guide and dispersion blocks and the grooved flow channel are added in the pump head, so that when the sewage and dirt pass through the sewage discharge channel, the cut dirt is guided back and forth through the cooperation of the guide and dispersion blocks and the grooved flow channel, and smoothly enters the dirt discharge port for discharge, preventing the entanglement of debris and the blockage of the pump head, while improving the head;

[0017] By adding a bottom isolation plate in the foot, sewage and dirt can enter the pump body in both radial and axial directions. Under the condition of reasonably reducing the single hole opening area, it is not easy to cause blockage. Whether the pump body is placed sideways or upright, it will not affect the entry of sewage and dirt. That is, this structure can make sewage and dirt enter evenly, ensuring that the dirt can be smoothly cut in the pump body, achieving the effect of multi-guiding;

[0018] In general, the new structural design is adopted, and the multi-guide method is used to achieve the effect of no blockage and no stalling, and it has the characteristics of low power consumption and high lift. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the upper cover plate side of the impeller in the present invention;

[0021] Figure 3 It is a structural schematic diagram of the lower cover plate side of the impeller in the present invention;

[0022] Figure 4 It is a schematic cross-sectional structural diagram of the impeller in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the pump bottom cover in the present invention;

[0024] Figure 6 It is a schematic diagram of the structure of the pump head in the present invention;

[0025] Figure 7 It is a structural schematic diagram of the bottom foot in the present invention;

[0026] Figure 8 It is a structural schematic diagram of the water thrower in the present invention;

[0027] The reference numerals in the figure are: 1, pump top cover; 2, pump head; 3, pump bottom cover; 4, foot; 5, pump shaft; 6, impeller; 7, upper cover plate; 8, lower cover plate; 9, main blade; 10, shaft sleeve; 11, water inlet ring; 13, lower blade; 14, cutting knife; 15, water hole; 16, guide block; 17, cutting edge; 18, mouth ring groove; 19, sand leakage port; 20, convex ring; 21, guide surface; 22 , pump chamber; 23, sewage flow channel; 24, guide dispersion block; 25, guide flow channel; 26, dispersion flow channel; 27, groove flow channel; 28, top plate; 29, side isolation plate; 30, bottom plate; 31, outer water inlet hole; 32, bottom isolation plate; 33, bottom water inlet hole; 34, inner water inlet hole; 35, reinforcing rib; 36, elastic washer; 37, adjusting nut; 38, water ejector; 39, centrifugal blades. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-8 :

[0029] A guided sewage pump comprises a motor, a pump top cover 1, a pump head 2, a pump bottom cover 3 and a foot 4 connected in sequence from top to bottom, a pump shaft 5 is arranged in the motor, and an impeller 6 arranged in the pump head 2 is arranged on the pump shaft 5, characterized in that: the impeller 6 comprises an upper cover plate 7, a lower cover plate 8, and a main blade 9 arranged between the upper cover plate 7 and the lower cover plate 8, a shaft sleeve 10 adapted to the pump shaft 5 is arranged on the upper cover plate 7, a water inlet ring 11 is arranged on the lower cover plate 8, and a plurality of lower blades 13 are arranged on the lower surface of the lower cover plate 8, the main blade 9 comprises an inner end and an outer end, a cutting knife 14 is arranged on the inner end of the main blade 9, a water hole 15 facing the water inlet ring 11 is arranged on the pump bottom cover 3, and a guide block 16 arranged in the water inlet ring 11 is arranged at the upper end of the water hole 15.

[0030] The main part of the impeller 6 adopts a closed structure, which has the advantages of high head and high efficiency. By arranging an open lower blade 13 at the lower end of the impeller 6, it cooperates with the guide surface 21 on the pump bottom shell, and can also generate outward centrifugal force when it rotates, thereby solving the problems of leakage and sand jam between the impeller 6 and the pump bottom shell, and can increase the head to achieve the purpose of improving the overall efficiency; the guide block 16 and the pump bottom shell are an integrally formed structure, and the guide block 16 has an inclined guide surface, which is convenient for quickly guiding the dirt into the impeller 6; the impeller can adopt a stainless steel structure, which meets the use requirements and has a low manufacturing cost.

[0031] The pump bottom cover 3 is also provided with a ring groove 18 which is arranged around the water hole 15 and is adapted to the water inlet ring 11. The inner wall of the water hole 15 is provided with a sand leakage hole 19 which is connected to the ring groove 18. The ring groove 18 is used to be installed and matched with the water inlet ring 11, and plays a role in preventing leakage between the water inlet ring 11 and the water hole 15, thereby improving the head and efficiency of the pump; the cutting knife 14 is directly opposite to the water inlet ring 11. When dirt enters from the water inlet ring 11, the cutting knife 14 cuts the dirt, so that the dirt smoothly enters the flow channel of the impeller 6 to prevent blockage; at the same time, the guide block 16 cooperates with the cutting knife 14, and the two are tangent to each other during rotation, so as to generate shear force on the dirt and improve the cutting effect.

[0032] The width of the cutting knife 14 is smaller than that of the main blade 9. The inner end of the main blade 9 forms a side cutting edge 17, and the side cutting edge 17 is axially aligned with the inner wall of the impeller 6 ring, so that the inner end of the main blade can also play a cutting role, thereby improving the cutting ability.

[0033] A convex ring 20 is also provided on the outer peripheral edge of the upper surface of the pump bottom cover 3, and an inclined guide surface 21 is provided on the inner wall of the convex ring 20. The convex ring 20 is used to engage with the lower end of the pump head 2 to increase stability. When the impeller 6 rotates, an outward centrifugal water flow can be formed on the upper surface of the pump bottom cover 3, and the sewage and dirt remaining on the upper surface of the pump bottom cover 3 can be transported to the pump head 2 through the guide surface 21, thereby preventing sand from getting stuck.

[0034] The pump head 2 includes a pump chamber 22 of an annular structure and a sewage discharge channel 23 tangentially connected to the pump chamber 22. The pump head 2 is also provided with a guide and dispersion block 24 placed on the connecting end of the pump chamber 22 and the sewage discharge channel 23 and used for guiding and dispersing sewage. A guide channel 25 and a dispersion channel 26 are formed between the guide and dispersion block 24 and the cavity wall of the pump chamber 22.

[0035] The guide channel 25 is directly connected to the sewage channel 23, and is used to quickly guide the sewage and dirt in the pump chamber 22 into the sewage channel 23; the dispersion channel 26 can be a single channel, located on the upper or lower side of the guide dispersion block 24, or there can be two dispersion channels 26, which are respectively located on the upper and lower sides of the guide dispersion block 24; if there is too much dirt in the sewage, it flows through the guide dispersion block 24, and most of the sewage and dirt are quickly guided into the sewage channel 23, which can increase the head, and a small part of the sewage and dirt is dispersed into the dispersion channel 26, so that it re-enters the pump chamber 22 for circulation, avoiding the sewage and dirt from causing blockage at the connection between the sewage channel 23 and the pump chamber 22.

[0036] A grooved flow channel 27 is also provided on the inner wall of the pump chamber 22. The grooved flow channel 27 is located in the dispersion flow channel 26 and is connected to the sewage flow channel 23. The dirt entering the dispersion flow channel 26 can re-enter the sewage flow channel 23 through the grooved flow channel 27 to ensure the discharge of sewage and dirt.

[0037] The specific principle of the pump head is: when the liquid and debris in the sewage and dirt are mixed and enter the pump chamber 22, under the action of the guide dispersion block 24, some of the debris will be separated from the liquid along the inclined surface of the guide dispersion block 24, and the liquid will be discharged along the guide channel 25 and the sewage channel 23, while the debris separated along the inclined surface will pass through the dispersion channel 24 and re-enter the sewage channel 21 along the groove channel 25. The dispersion and guiding method can effectively prevent the sewage and dirt from directly clogging at the connecting end of the sewage channel 23 and the pump chamber 22. At the same time, the end of the guide dispersion block 24 is a pointed structure, which can reduce the head loss of the liquid in the pump chamber 22. Therefore, the design of the guide dispersion block 24 inherits the high efficiency of the traditional pump head and solves the problem of easy clogging of the traditional pump head.

[0038] The base 4 includes a top plate 28, a side isolation plate 29 and a bottom plate 30 connected in sequence. The side isolation plate 29 is provided with a plurality of outer water inlet holes 31. The side isolation plate 29 is annular and surrounds a water inlet chamber. The top plate 28 is provided with a water outlet facing the water hole 15. A bottom isolation plate 32 is provided in the water inlet chamber. The bottom isolation plate 32 is provided with a plurality of bottom water inlet holes 33. A plurality of inner water inlet holes 34 are provided between the bottom isolation plate 32 and the top plate 28.

[0039] A plurality of connecting ribs for connecting the bottom isolation plate 32 are provided on the bottom surface of the top plate 28. The connecting ribs are arranged around the water outlet, and inner water inlet holes 34 are formed between adjacent connecting ribs. The connecting ribs, the top plate 28 and the bottom isolation plate 32 can be welded and fixed. The opening area of ​​the inner water inlet hole 34 can be adjusted by the number of connecting ribs and the spacing between them, so that sewage and dirt can pass through smoothly; by the arrangement of the bottom isolation plate 32, when sewage enters the pump head 2 through the top plate 28, it can achieve two-way entry from the bottom water inlet hole 33 and the inner water inlet hole 34, which can avoid blockage and allow dirt in the sewage to enter the pump head 2 evenly.

[0040] The outer wall of the side isolation plate 29 is also provided with a plurality of reinforcing ribs 35 connected to the bottom plate 30. The reinforcing ribs 35 are located between adjacent outer water inlet holes 31. The reinforcing ribs 35 can increase the structural strength between the side isolation plate 29 and the bottom plate 30. At the same time, the reinforcing ribs 35 are located on the outer side of the side isolation plate 29 and have an outward convex structure, which can prevent large pieces or pieces of debris from directly covering the outer water inlet holes 31, thereby reducing the possibility of clogging of the outer water inlet holes 31.

[0041] An axially abutting elastic washer 36 is also provided between the impeller 6 and the pump shaft 5, and an adjusting nut 37 for axially fixing the impeller 6 is provided on the pump shaft 5. With the above structure, the distance between the impeller 6 and the pump bottom cover 3 can be adjusted by tightening or loosening the adjusting nut 37, so that it can be adjusted under different usage environments to achieve the best leakage and sand jam prevention effects.

[0042] The pump shaft 5 is also provided with a water thrower 38 placed above the impeller 6. The water thrower 38 is fixedly connected to the pump shaft 5 in the circumferential direction. A plurality of centrifugal blades 39 arranged at equal intervals are provided on the outer circumference of the water thrower 38.

[0043] The water thrower 38 and the pump shaft 5 may be connected by a key, and the centrifugal blades 39 enable the water thrower 38 to generate an outward centrifugal force when rotating, thereby further preventing debris from being entangled on the pump shaft 5 .

[0044] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A guided sewage pump, comprising a motor, a pump top cover (1), a pump head (2), a pump bottom cover (3) and a foot (4) connected in sequence from top to bottom, a pump shaft (5) being arranged in the motor, and an impeller (6) being arranged in the pump head (2) on the pump shaft (5), Features: The impeller (6) comprises an upper cover plate (7), a lower cover plate (8), and a main blade (9) disposed between the upper cover plate (7) and the lower cover plate (8); a shaft sleeve (10) adapted to the pump shaft (5) is disposed on the upper cover plate (7); a water inlet ring (11) is disposed on the lower cover plate (8); a plurality of lower blades (13) are disposed on the lower surface of the lower cover plate (8); the main blade (9) comprises an inner end and an outer end; a cutting knife (14) is disposed on the inner end of the main blade (9); a water through hole (15) facing the water inlet ring (11) is disposed on the pump bottom cover (3); and a guide block (16) disposed in the water inlet ring (11) is disposed at the upper end of the water through hole (15); The width of the cutting blade (14) is smaller than the width of the main blade (9), the inner end of the main blade (9) forms a side cutting edge (17), and the side cutting edge (17) is axially aligned with the inner wall of the impeller (6) mouth ring; The pump bottom cover (3) is also provided with a mouth ring groove (18) arranged around the water hole (15) and adapted to the water inlet ring (11); the inner wall of the water hole (15) is provided with a sand leakage port (19) connected to the mouth ring groove (18); A convex ring (20) is also provided on the outer peripheral edge of the upper surface of the pump bottom cover (3), and an inclined flow guide surface (21) is provided on the inner wall of the convex ring (20); The pump head (2) comprises a pump chamber (22) of an annular structure, and a sewage discharge channel (23) tangentially connected to the pump chamber (22). The pump head (2) is further provided with a guide and dispersion block (24) disposed at the connection end between the pump chamber (22) and the sewage discharge channel (23) and used for guiding and dispersing sewage. A guide channel (25) and a dispersion channel (26) are formed between the guide and dispersion block (24) and the cavity wall of the pump chamber (22); A groove-shaped flow channel (27) is also provided on the inner wall of the pump chamber (22), and the groove-shaped flow channel (27) is located in the dispersion flow channel (26); The foot (4) comprises a top plate (28), a side isolation plate (29) and a bottom plate (30) which are connected in sequence. The side isolation plate (29) is provided with a plurality of outer water inlet holes (31). The side isolation plate (29) is annular and surrounds a water inlet chamber. The top plate (28) is provided with a water outlet directly opposite to the water outlet hole (15). A bottom isolation plate (32) is provided in the water inlet chamber. The bottom isolation plate (32) is provided with a plurality of bottom water inlet holes (33). A plurality of inner water inlet holes (34) are provided between the bottom isolation plate (32) and the top plate (28).

2. A guided sewage pump according to claim 1, Features: A plurality of reinforcing ribs (35) connected to the bottom plate (30) are also provided on the outer wall of the side isolation plate (29).

3. A guided sewage pump according to claim 1, Features: An axially abutting elastic washer (36) is also provided between the impeller (6) and the pump shaft (5), and an adjusting nut (37) for axially fixing the impeller (6) is provided on the pump shaft (5).

4. A guided sewage pump according to claim 1, Features: The pump shaft (5) is also provided with a water thrower (38) disposed above the impeller (6); the water thrower (38) is fixedly connected to the pump shaft (5) in the circumferential direction; and a plurality of centrifugal blades (39) arranged at equal intervals are provided on the outer circumference of the water thrower (38).

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