A cutting type guided sewage pump

Abstract

The present invention discloses a cutting-type guide sewage pump, which has the characteristics of low power consumption, high head and high overall efficiency. The key points of the technical solution are that it includes a motor, a pump head, a pump middle section and a base. The motor, the pump head, the pump middle section and the base are 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. A cutting disk is arranged below the base. A cutting blade arranged outside the cutting disk is arranged at the lower end of the pump shaft. The impeller includes 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 matching the pump shaft is arranged on the upper cover plate, a water inlet ring is arranged on the lower cover plate, and a lower blade is also arranged on the lower surface of the lower cover plate. A partition panel is arranged at the upper end of the pump middle section, a water through hole directly facing the water inlet ring is arranged on the partition panel, and a first guide block arranged in the water inlet ring is arranged at the upper end of the water through hole. The present invention is applicable to the technical field of sewage pumps.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage pumps, and in particular relates to a cutting-type guide 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 and fibers, as well as 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, at least three cutting knives are required to cut the dirt, and the cutting knives are wearing parts, which greatly increases the manufacturing cost and maintenance cost of the water pump; and it adopts a semi-open impeller structure, and the pump head is low when in use, and it is difficult to meet the national standards in terms of efficiency; 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 cutting-type guided sewage pump, which has the characteristics of low power consumption, high head and high overall efficiency.

[0004] The objective of the present invention is achieved in this way: a cutting-type guide sewage pump comprises a motor, a pump head, a pump middle section and a base, wherein the motor, the pump head, the pump middle section and the base are 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, a cutting disk is arranged below the base, a cutting blade arranged outside the cutting disk is arranged at the lower end of the pump shaft, and 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 lower blade is also arranged on the lower surface of the lower cover plate, a partition panel is arranged at the upper end of the pump middle section, a water through hole opposite to the water inlet ring is arranged on the partition panel, and a first 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 pump head includes a pump chamber of an annular structure and a sewage discharge channel tangentially connected to the pump chamber. The pump head is also provided with a guide and dispersion block placed on the connecting end of the pump chamber and the sewage discharge channel and used for guiding and dispersing sewage. A guide channel and a dispersion channel are formed between the guide and dispersion block and the wall of the pump chamber.

[0006] 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.

[0007] The present invention is further configured as follows: an upper convex ring is provided on the upper end surface of the partition panel, an inclined guide surface is formed between the inner wall of the upper convex ring and the upper surface of the partition panel, a mouth ring groove adapted to the water inlet ring is also provided on the upper end surface of the partition panel, and a sand leakage port connected to the mouth ring groove is provided on the inner wall of the water hole.

[0008] The present invention is further configured as follows: a second guide block connected to the main blade is also provided in the impeller.

[0009] The present invention is further configured as follows: the cutting disk includes a plurality of groups of water inlet channels evenly distributed in an annular direction, each group of water inlet channels includes two outer arc channels and one inner arc channel, the outer arc channels and the inner arc channels both include a cutting starting end and a cutting end, and the width of the outer arc channels and the width of the inner arc channels both gradually decrease from the cutting starting end to the cutting end.

[0010] The present invention is further configured as follows: the cutting knife comprises a main body portion connected to the pump shaft, and a cutting portion connected to the main body portion, wherein the cutting portion comprises a short-distance cutting edge of an arc-shaped structure and an extended long-distance cutting edge.

[0011] The present invention is further configured as follows: a first elastic washer for axial abutment is provided between the cutting knife and the pump shaft, the cutting knife and the pump shaft are connected by threads, and a fastening nut for locking the cutting knife is also provided at the lower end of the pump shaft.

[0012] The present invention is further configured as follows: a second 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 main 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] Through the structural setting of the upper volume cavity in the middle section of the pump and the first guide block, the cut material can be fully dispersed and disconnected and quickly incorporated into the impeller, and through the setting of the mouth ring groove, the sand leakage port and the guide surface, it can play the role of preventing leakage and sand jamming;

[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] The coordinated design of the new cutting disc and cutting knife can effectively reduce the motor load and energy consumption, and the cutting effect is good. The dirt can be cut into a shorter length at one time to prevent the dirt from entangled and clogging the pump head.

[0018] In general, the new structural design uses a guiding method to achieve the effect of no blockage and no stalling, and has the characteristics of low power consumption and high lift. The overall efficiency can be improved by more than 20% compared with the national standard. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 The present invention Figure 1 AA structural diagram;

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

[0022] Figure 4 It is a structural schematic diagram of the lower cover plate side of the impeller in the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the middle section of the pump 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 schematic diagram of the structure of the cutting disc in the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the cutting knife in the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the water-throwing ring in the present invention;

[0028] The reference numerals in the figure are: 1, motor; 2, pump head; 3, pump middle section; 4, foot; 5, pump shaft; 6, impeller; 8, cutting disc; 9, cutting knife; 10, upper cover plate; 11, lower cover plate; 12, main blade; 13, shaft sleeve; 14, water inlet ring; 16, lower blade; 17, partition panel; 18, water hole; 19, first guide block; 20, pump chamber; 21, sewage flow channel; 22, guide dispersion block; 23, guide flow channel; 24, dispersion flow channel; 2 5. Groove-shaped flow channel; 26. Upper convex ring; 27. Guide surface; 28. Mouth ring groove; 29. ​​Sand leakage port; 30. Second guide block; 31. Outer arc flow channel; 32. Inner arc flow channel; 33. Cutting start end; 34. Cutting end end; 35. Main body; 36. Close-range cutting edge; 37. Long-range cutting edge; 38. First elastic washer; 39. Fastening nut; 40. Second elastic washer; 41. Adjusting nut; 42. Water ejector; 43. Centrifugal blades. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to specific embodiments of the present invention. Figure 1-9 :

[0030] A cutting-type guided sewage pump comprises a motor 1, a pump head 2, a pump middle section 3 and a foot 4, wherein the motor 1, the pump head 2, the pump middle section 3 and the foot 4 are connected in sequence from top to bottom, a pump shaft 5 is arranged in the motor 1, an impeller 6 arranged in the pump head 2 is arranged on the pump shaft 5, a cutting disc 8 is arranged below the foot 4, and a cutting knife 9 is arranged on the lower end of the pump shaft 5 and arranged outside the cutting disc 8, characterized in that: the impeller 6 comprises an upper cover plate 10, a lower cover plate 11, and a main blade 12 arranged between the upper cover plate 10 and the lower cover plate 11, a shaft sleeve 13 adapted to the pump shaft 5 is arranged on the upper cover plate 10, a water inlet ring 14 is arranged on the lower cover plate 11, and a lower blade 16 is arranged on the lower surface of the lower cover plate 11, a partition panel 17 is arranged at the upper end of the pump middle section 3, a water through hole 18 facing the water inlet ring 14 is arranged on the partition panel 17, and a first guide block 19 arranged in the water inlet ring 14 is arranged at the upper end of the water through hole 18.

[0031] The main body 35 of the impeller 6 adopts a closed structure, which has the advantages of high head and high efficiency. The lower surface of the lower cover plate 11 is provided with a lower blade 16. By arranging an open lower blade 16 at the lower end of the impeller 6, it cooperates with the guide surface 27 on the pump middle section 3, 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 middle section 3, and can increase the head to achieve the purpose of improving the overall efficiency; the first guide block 19 and the pump middle section 3 are an integrally formed structure, and the first guide block 19 has an inclined guide surface, which is convenient for quickly guiding the dirt into the impeller 6, and the pump middle section 3 has a large cavity space, which can make the cut object fully dispersed and disconnected in the cavity to ensure uniform entry into the impeller 6.

[0032] The impeller 6 can be made of stainless steel as a whole, and each component can be fixed by welding, which has low production cost and long service life.

[0033] The pump head includes a pump chamber 20 with an annular structure and a sewage discharge channel 21 tangentially connected to the pump chamber 20. The pump head also includes a guide and dispersion block 22 placed on the connecting end of the pump chamber 20 and the sewage discharge channel 21 and used for guiding and dispersing sewage. A guide channel 23 and a dispersion channel 24 are formed between the guide and dispersion block 22 and the cavity wall of the pump chamber 20.

[0034] The guide channel 23 is directly connected to the sewage channel 21, and is used to quickly guide the sewage and dirt in the pump chamber 20 into the sewage channel 21; the dispersion channel 24 can be a single channel, located on the upper or lower side of the guide dispersion block 22, or there can be two dispersion channels 24, respectively located on the upper and lower sides of the guide dispersion block 22; if there is too much dirt in the sewage, it flows through the guide dispersion block 22, and most of the sewage and dirt are quickly guided into the sewage channel 21, which can increase the head, and a small part of the sewage and dirt is dispersed into the dispersion channel 24, so that it re-enters the pump chamber 20 for circulation, avoiding the sewage and dirt from causing blockage at the connection between the sewage channel 21 and the pump chamber 20.

[0035] A grooved channel 25 is also provided on the inner wall of the pump chamber 20. The grooved channel 25 is located in the dispersion channel 24 and is connected to the sewage channel 21. Dirt entering the dispersion channel 24 can re-enter the sewage channel 21 through the grooved channel 25 to ensure the discharge of sewage and dirt.

[0036] 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 20, under the action of the guide dispersion block 22, some of the debris will be separated from the liquid along the inclined surface of the guide dispersion block 22, and the liquid will be discharged along the guide channel 23 and the sewage channel 21, 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 21 and the pump chamber 20. At the same time, the end of the guide dispersion block 22 is a pointed structure, which can reduce the head loss of the liquid in the pump chamber 20. Therefore, the design of the guide dispersion block 22 inherits the high efficiency of the traditional pump head and solves the problem of easy clogging of the traditional pump head.

[0037] An upper convex ring 26 is provided on the upper end surface of the partition panel 17, and an inclined guide surface 27 is formed between the inner wall of the upper convex ring 26 and the upper surface of the partition panel 17. A mouth ring groove 28 adapted to the water inlet ring 14 is also provided on the upper end surface of the partition panel 17, and a sand leakage port 29 connected to the mouth ring groove 28 is provided on the inner wall of the water hole 18.

[0038] The upper convex ring 26 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 partition panel 17, and the sewage and dirt remaining on the upper surface of the panel can be transported to the pump head 2 through the guide surface 27, thereby preventing sand from getting stuck; the impeller 6 mouth ring groove 28 is used to be installed with the impeller 6 mouth ring, and plays a role in preventing leakage between the impeller 6 mouth ring and the water hole 18, thereby improving the pump head and efficiency; the sand leakage port 29 has a relatively small opening volume, which can facilitate the downward discharge of mud and sand impurities in the pump head 2 without affecting leakage, thereby preventing sand from getting stuck.

[0039] The impeller 6 is also provided with a second guide block 30 connected to the main blade 12. The second guide block 30 is located on one end of the main blade 12 close to the water inlet ring 14 to further guide the dirt so that the dirt can pass through the impeller 6 quickly.

[0040] The width of the second guide block 30 is smaller than the width of the main blade 12, and the width of the second guide block 30 gradually increases from the end far away from the main blade 12 to the end close to the second guide block 30, that is, the side of the second guide block 30 facing the water inlet ring 14 is an inclined surface, which can play a better drainage role when sewage and dirt enter axially from the water inlet ring 14.

[0041] The cutting disk 8 includes a plurality of groups of water inlet channels evenly distributed in an annular direction, each group of water inlet channels includes two outer arc channels 31 and one inner arc channel 32, the outer arc channels 31 and the inner arc channels 32 both include a cutting starting end 33 and a cutting ending end 34, and the width of the outer arc channel 31 and the width of the inner arc channel 32 both gradually decrease from the cutting starting end 33 to the cutting ending end 34.

[0042] The cutting disc 8 is mounted on the bottom surface of the base 4. By arranging a plurality of shorter arc-shaped flow channels on the cutting disc 8 and adopting an inner and outer double flow channel design, the entry area of ​​sewage and dirt can be increased, and the length of the cut object can be shortened, so that it can smoothly enter the pump middle section 3, prevent the entanglement of debris and blockage, and ensure the safe and reliable operation of the equipment; and during the cutting process, the cutting knife 9 gradually slides from the cutting starting end 33 with a larger width to the cutting end 34 with a smaller width, which can reduce the load on the motor 1.

[0043] The cutting blade 9 includes a main body 35 for connecting with the pump shaft 5 and a cutting portion connected with the main body 35 . The cutting portion includes a short-distance cutting edge 36 of an arc-shaped structure and an extended long-distance cutting edge 37 .

[0044] During cutting, the closer the object to be cut is to the center of the cutting blade 9, the greater the torque applied to the pump shaft 5. In order to ensure that the power of the pump is more stable, the close-range cutting edge 36 close to the main body 35 adopts an arc structure. When rotating, the length of the cutting edge is extended, and the outer arc wall of the outer arc flow channel 31 and the outer arc wall of the inner arc flow channel 32 can be cut first, so that the cutting force is dispersed, thereby reducing the load on the motor 1, improving the cutting effect and delaying the service life of the cutting blade 9; the long-distance cutting edge 37 is used to increase the cutting area, and its curvature can be gradually gentle.

[0045] A first elastic washer 38 for axial abutment is provided between the cutting blade 9 and the pump shaft 5, and the cutting blade 9 and the pump shaft 5 are connected by threads. With the above structure, the clearance between the cutting blade 9 and the cutting disk 8 can be adjusted by adjusting the tightening force between the cutting blade 9 and the pump shaft 5, and can be adjusted according to the actual use environment to achieve the best cutting effect; a fastening nut 39 for locking the cutting blade 9 is also provided at the lower end of the pump shaft 5, which better fixes the cutting blade 9.

[0046] A second elastic gasket 40 for axial abutment is also provided between the impeller 6 and the pump shaft 5. An adjusting nut 41 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 partition panel 17 on the middle section 3 of the pump can be adjusted by tightening or loosening the adjusting nut 41, so that it can be adjusted under different usage environments to achieve the best leakage and sand jam prevention effects.

[0047] The pump shaft 5 is also provided with a water thrower 42 disposed above the impeller 6. The water thrower 42 is fixedly connected to the pump shaft 5 in the circumferential direction. A plurality of centrifugal blades 43 arranged at equal intervals are provided on the outer circumference of the water thrower 42.

[0048] The water thrower 42 and the pump shaft 5 may be connected by a key, and the centrifugal blades 43 enable the water thrower 42 to generate an outward centrifugal force when rotating, thereby further preventing debris from being entangled on the pump shaft 5 .

[0049] In general, the new structural design uses a guiding method to achieve the effect of no blockage and no stalling, and has the characteristics of low power consumption and high head. After many tests, it was found that the overall efficiency of the pump can be improved by more than 20% compared with the national standard.

[0050] 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 cutting-type guided sewage pump, comprising a motor (1), a pump head (2), a pump middle section (3) and a foot (4), wherein the motor (1), the pump head (2), the pump middle section (3) and the foot (4) are connected in sequence from top to bottom, a pump shaft (5) is provided in the motor (1), an impeller (6) disposed in the pump head (2) is provided on the pump shaft (5), a cutting disc (8) is provided below the foot (4), and a cutting knife (9) disposed outside the cutting disc (8) is provided at the lower end of the pump shaft (5), Features: The impeller (6) comprises an upper cover plate (10), a lower cover plate (11), and a main blade (12) disposed between the upper cover plate (10) and the lower cover plate (11); a shaft sleeve (13) adapted to the pump shaft (5) is disposed on the upper cover plate (10); a water inlet ring (14) is disposed on the lower cover plate (11); a lower blade (16) is further disposed on the lower surface of the lower cover plate (11); a partition panel (17) is disposed at the upper end of the pump middle section (3); a water hole (18) directly facing the water inlet ring (14) is disposed on the partition panel (17); and a first guide block (19) disposed in the water inlet ring (14) is disposed at the upper end of the water hole (18); The pump head comprises a pump chamber (20) of an annular structure, and a sewage discharge channel (21) tangentially connected to the pump chamber (20). The pump head is also provided with a guide and dispersion block (22) disposed at the connection end between the pump chamber (20) and the sewage discharge channel (21) and used for guiding and dispersing sewage. A guide channel (23) and a dispersion channel (24) are formed between the guide and dispersion block (22) and the cavity wall of the pump chamber (20); A groove-shaped flow channel (25) is also provided on the inner wall of the pump chamber (20), and the groove-shaped flow channel (25) is located in the dispersion flow channel (24); An upper convex ring (26) is provided on the upper end surface of the partition panel (17); an inclined guide surface (27) is formed between the inner wall of the upper convex ring (26) and the upper surface of the partition panel (17); a mouth ring groove (28) adapted to the water inlet ring (14) is also provided on the upper end surface of the partition panel (17); and a sand leakage port (29) communicating with the mouth ring groove (28) is provided on the inner wall of the water hole (18); A second guide block (30) connected to the main blade (12) is also provided in the impeller (6); The cutting disc (8) comprises a plurality of groups of water inlet flow channels evenly distributed in an annular direction, each group of water inlet flow channels comprises two outer arc-shaped flow channels (31) and one inner arc-shaped flow channel (32), the outer arc-shaped flow channels (31) and the inner arc-shaped flow channels (32) both comprise a cutting start end (33) and a cutting end end (34), and the width of the outer arc-shaped flow channels (31) and the width of the inner arc-shaped flow channels (32) both gradually decrease from the cutting start end (33) to the cutting end end (34).

2. A cutting type guided sewage pump according to claim 1, Features: The cutting knife (9) comprises a main body (35) for connecting to the pump shaft (5), and a cutting portion connected to the main body (35), wherein the cutting portion comprises a short-distance cutting edge (36) of an arc-shaped structure and an extended long-distance cutting edge (37).

3. A cutting-type guided sewage pump according to claim 1, Features: A first elastic washer (38) for axial abutment is provided between the cutting blade (9) and the pump shaft (5); the cutting blade (9) and the pump shaft (5) are connected via threads; a fastening nut (39) for locking the cutting blade (9) is also provided at the lower end of the pump shaft (5).

4. A cutting-type guided sewage pump according to claim 1, Features: A second elastic washer (40) for axial abutment is also provided between the impeller (6) and the pump shaft (5), and an adjusting nut (41) for axially fixing the impeller (6) is provided on the pump shaft (5).

5. A cutting-type guided sewage pump according to claim 1, Features: The pump shaft (5) is also provided with a water thrower (42) disposed above the impeller (6); the water thrower (42) is fixedly connected to the pump shaft (5) in the circumferential direction; and a plurality of centrifugal blades (43) arranged at equal intervals are provided on the outer circumference of the water thrower (42).

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