Sewage pump

Abstract

The utility model discloses a sewage pump which comprises a volute, the top face of the volute is fixedly connected with a pump body, the top face of the pump body is fixedly connected with a submersible motor, the side wall of the volute is fixedly connected and communicated with a liquid outlet, a liquid inlet is formed in the center of the bottom face of the volute, the center of the interior of the pump body is rotationally sleeved with a main shaft, and the bottom end of the main shaft is located in the volute and fixedly connected with an upper limiting plate. The bottom surface of the upper limiting plate is fixedly connected with a hexagonal column, and the bottom surface of the hexagonal column is fixedly connected with a lower limiting plate; during use, when impurities are generated between the centrifugal impeller assembly and the inner side of the volute, the centrifugal impeller assembly is extruded to generate floating displacement, so that the impurities can smoothly pass through, and the phenomenon that the rotation of the centrifugal impeller assembly is blocked due to excessive accumulation of the impurities is avoided; the cutter head assembly is fixed through the pressing ring, the cutter head assembly can be directly taken out after the pressing ring is removed, the shell does not need to be removed, and the cutter head is more convenient to replace and more practical.

Description

Technical Field

[0001] This utility model relates to the field of sewage pump technology, specifically to a sewage pump. Background Technology

[0002] Sewage pumps are a type of centrifugal impurity pump, and come in various forms, such as submersible and dry types. Submersible sewage pumps are the most commonly used. Because sewage contains many impurities, modern sewage pumps are equipped with cutterheads to cut these impurities and prevent clogging. For example, Chinese invention application CN107476986A discloses a sewage pump consisting of a pump body, base, stirring impeller, impeller, pump cover, oil chamber, mechanical seal shaft, oil-water probe, bearing, motor, motor housing, signal line, motor cover, cable, and outlet chamber. The stirring impeller is connected to the lower center of the pump body, and the base is connected to both ends of the bottom of the pump body. However, current sewage pumps have the following drawbacks:

[0003] Currently, when sewage pumps are in use, impurities are generated on the impeller and inside the casing. If the impurities accumulate, they will cause the impeller to rotate obstructed. The cutter head of the sewage pump is prone to wear and needs to be replaced frequently, but the cutter head itself is troublesome to disassemble and is not conducive to use.

[0004] Therefore, we propose a sewage pump to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a sewage pump to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sewage pump, comprising a volute, a pump body fixedly connected to the top surface of the volute, a submersible motor fixedly connected to the top surface of the pump body, a drain port fixedly connected to and connected to the side wall of the volute, an inlet port opened at the center of the bottom surface of the volute, a main shaft rotatably sleeved at the center of the pump body, the bottom end of the main shaft located inside the volute and fixedly connected to an upper limit plate, a hexagonal column fixedly connected to the bottom surface of the upper limit plate, a lower limit plate fixedly connected to the bottom surface of the hexagonal column, the bottom surface of the lower limit plate being the center of the inlet port and fixedly connected to a short shaft, a square column fixedly connected to the bottom surface of the short shaft, a centrifugal impeller assembly slidably disposed on the hexagonal column, and a cutter head assembly disposed on the square column.

[0007] Preferably, the centrifugal impeller assembly includes a sleeve, a top circular plate is fixedly sleeved at the top of the sleeve, a plurality of centrifugal blades are uniformly fixed to the periphery of the sleeve, a bottom ring is fixed to the bottom edge of the plurality of centrifugal blades, and the pipe body is vertically fixed to the inner wall of the bottom ring.

[0008] Preferably, the tube body passes through the liquid inlet, and a hexagonal opening is vertically formed on the sleeve, with the hexagonal column slidingly fitted into the hexagonal opening.

[0009] Preferably, the cutter head assembly includes an inner plate, with multiple cutting blades uniformly fixed to the periphery of the inner plate, and an outer ring body fixed to the ends of the multiple cutting blades. A square opening is vertically formed on the inner plate, and a square column is slidably sleeved on the square opening.

[0010] Preferably, the bottom surface of the volute is fixed to an annular shell, the bottom of the inner sidewall of the annular shell is provided with an annular opening, the outer annular body is sleeved in the annular opening, a pressure ring is vertically sleeved in the annular opening, a plurality of lugs are uniformly fixed to the periphery of the pressure ring, a plurality of slots are provided on the bottom sidewall of the annular opening corresponding to the positions of the plurality of lugs, the lugs are inserted into the slots, a threaded through hole is vertically provided on the lug, a threaded hole is provided on the top surface of the slot, the threaded through hole and the threaded hole are threaded to connect bolts, a plurality of upper balls are uniformly rolled and connected to the top surface of the annular opening, the upper balls roll and contact the top surface of the outer annular body, a plurality of lower balls are uniformly rolled and connected to the top surface of the pressure ring, the plurality of lower balls roll and contact the bottom surface of the outer annular body.

[0011] Preferably, the bottom surface of the volute is fixedly connected to the base, and the end of the submersible motor shaft is fixedly connected to the top of the main shaft.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] When this invention is in use, if impurities are generated between the centrifugal impeller assembly and the inner side of the volute, the centrifugal impeller assembly will be squeezed and float, allowing the impurities to pass through smoothly and avoiding excessive accumulation of impurities that would obstruct the rotation of the centrifugal impeller assembly. This invention uses a pressure ring to fix the cutter head assembly, and the cutter head assembly can be directly removed after removing the pressure ring without disassembling the outer shell, making cutter head replacement more convenient and practical. Attached Figure Description

[0014] Figure 1 These are schematic diagrams of the main structure in the first and second embodiments of this utility model;

[0015] Figure 2 These are schematic diagrams of the main body cross-section structure in the first and second embodiments of this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the cutter head assembly in the second embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the centrifugal impeller assembly in the second embodiment of the present invention.

[0018] In the diagram: 1. Volute; 2. Submersible motor; 3. Centrifugal impeller assembly; 4. Cutter disc assembly; 11. Drain port; 12. Inlet port; 13. Main shaft; 14. Upper limit plate; 15. Hexagonal column; 16. Lower limit plate; 17. Short shaft; 18. Square column; 19. Annular shell; 110. Ring opening; 111. Pressure ring; 112. Groove; 113. Ear block; 114. Threaded through hole; 115. Threaded hole; 116. Bolt; 117. Upper ball bearing; 118. Lower ball bearing; 119. Base; 120. Pump body; 31. Sleeve; 32. Top circular plate; 33. Centrifugal blade; 34. Bottom ring; 35. Tube body; 36. Hexagonal through opening; 41. Inner plate; 42. Cutting blade; 43. Outer ring body; 44. Square opening. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1:

[0021] Please see Figure 1-2 This utility model provides a technical solution: a sewage pump, including a volute 1, a pump body 120 fixedly connected to the top surface of the volute 1, a submersible motor 2 fixedly connected to the top surface of the pump body 120, a drain port 11 fixedly connected and connected to the side wall of the volute 1, an inlet port 12 opened at the center of the bottom surface of the volute 1, a main shaft 13 rotatably sleeved inside the pump body 120, the bottom end of the main shaft 13 located inside the volute 1 and fixedly connected to an upper limit plate 14, a hexagonal column 15 fixedly connected to the bottom surface of the upper limit plate 14, and a lower limit plate 16 fixedly connected to the bottom surface of the hexagonal column 15. The bottom surface of the 6 is the center of the liquid inlet 12 and is fixed to the short shaft 17. The bottom surface of the short shaft 17 is fixed to the square column 18. The centrifugal impeller assembly 3 is slidably arranged on the hexagonal column 15, and the cutter disc assembly 4 is arranged on the square column 18. The centrifugal impeller assembly 3 is arranged in a vertical sliding manner. When impurities are generated between the centrifugal impeller assembly 3 and the inner side of the volute 1 during use, the centrifugal impeller assembly 3 will be squeezed and generate floating displacement, so that the impurities can pass through smoothly and avoid the phenomenon that excessive accumulation of impurities will cause the centrifugal impeller assembly 3 to be obstructed from rotating.

[0022] Example 2:

[0023] Please see Figure 1-4This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The centrifugal impeller assembly 3 includes a sleeve 31. A top circular plate 32 is fixedly sleeved at the top of the sleeve 31. Multiple centrifugal blades 33 are uniformly fixed to the periphery of the sleeve 31. A bottom ring 34 is fixed to the bottom edge of the multiple centrifugal blades 33. The inner side wall of the bottom ring 34 is vertically fixed to the pipe body 35.

[0024] The tube body 35 passes through the liquid inlet 12, and a hexagonal through-hole 36 is vertically opened on the sleeve 31. The hexagonal column 15 is slidably sleeved onto the hexagonal through-hole 36.

[0025] The cutter head assembly 4 includes an inner plate 41, with multiple cutting blades 42 uniformly fixed to the periphery of the inner plate 41, and an outer ring body 43 fixed to the ends of the multiple cutting blades 42. A square opening 44 is vertically opened on the inner plate 41, and a square column 18 is slidably sleeved on the square opening 44.

[0026] A volute 1 is fixedly connected to an annular shell 19 at its bottom. An annular opening 110 is formed at the bottom of the inner wall of the annular shell 19. An outer ring 43 is fitted into the annular opening 110. A pressure ring 111 is vertically fitted into the annular opening 110. Multiple lugs 113 are evenly fixed to the circumference of the pressure ring 111. Multiple slots 112 are formed on the bottom sidewall of the annular opening 110 corresponding to the positions of the lugs 113. The lugs 113 are inserted into the slots 112. Threaded through holes 114 are vertically formed on the lugs 113. Threaded holes 115 are formed on the top surface of the slots 112. The threaded hole 114 and threaded hole 115 are threaded to connect to the bolt 116. Multiple upper balls 117 are evenly rolled on the top surface of the ring 110. The upper balls 117 roll in contact with the top surface of the outer ring 43. Multiple lower balls 118 are evenly rolled on the top surface of the pressure ring 111. The multiple lower balls 118 roll in contact with the bottom surface of the outer ring 43. The cutter head assembly 4 is fixed by the pressure ring 111. After removing the pressure ring 111, the cutter head assembly 4 can be directly removed without removing the outer shell. This makes it more convenient and practical to replace the cutter head.

[0027] The bottom surface of the volute 1 is fixedly connected to the base 119, and the shaft end of the submersible motor 2 is fixedly connected to the top end of the main shaft 13.

[0028] Example 3:

[0029] Please see Figure 1-4 This is the third embodiment of the present invention. Based on the above two embodiments, when impurities are generated between the centrifugal impeller assembly 3 and the inner side of the volute 1 during use, the centrifugal impeller assembly 3 will be squeezed and will generate floating displacement, so that the impurities can pass through smoothly and avoid the phenomenon that excessive accumulation of impurities will cause the centrifugal impeller assembly 3 to be obstructed from rotating. The present invention uses the pressure ring 111 to fix the cutter disc assembly 4. After removing the pressure ring 111, the cutter disc assembly 4 can be directly taken out without removing the outer shell, making it more convenient and practical to replace the cutter disc.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sewage pump, comprising a volute (1), wherein a pump body (120) is fixedly connected to the top surface of the volute (1), and a submersible motor (2) is fixedly connected to the top surface of the pump body (120), characterized in that: The side wall of the volute (1) is fixed and connected to the drain port (11). The bottom surface of the volute (1) has an inlet port (12). The pump body (120) is rotatably sleeved with the main shaft (13). The bottom end of the main shaft (13) is located inside the volute (1) and fixed with the upper limit plate (14). The bottom surface of the upper limit plate (14) is fixed with a hexagonal column (15). The bottom surface of the hexagonal column (15) is fixed with a lower limit plate (16). The bottom surface of the lower limit plate (16) is the center of the inlet port (12) and fixed with a short shaft (17). The bottom surface of the short shaft (17) is fixed with a square column (18). A centrifugal impeller assembly (3) is slidably arranged on the hexagonal column (15). A cutter disc assembly (4) is arranged on the square column (18).

2. A sewage pump according to claim 1, characterized in that: The centrifugal impeller assembly (3) includes a sleeve (31), a top circular plate (32) is fixedly sleeved at the top of the sleeve (31), a plurality of centrifugal blades (33) are uniformly fixed to the periphery of the sleeve (31), a bottom ring (34) is fixed to the bottom edge of the plurality of centrifugal blades (33), and a pipe body (35) is vertically fixed to the inner wall of the bottom ring (34).

3. A sewage pump according to claim 2, characterized in that: The tube (35) passes through the inlet (12), and a hexagonal opening (36) is vertically opened on the sleeve (31). The hexagonal column (15) is slidably sleeved on the hexagonal opening (36).

4. A sewage pump according to claim 1, characterized in that: The cutter head assembly (4) includes an inner plate (41), a plurality of cutting blades (42) are uniformly fixed to the periphery of the inner plate (41), an outer ring (43) is fixed to the ends of the plurality of cutting blades (42), and a square opening (44) is vertically opened on the inner plate (41), and the square opening (44) is slidably sleeved with a square column (18).

5. A sewage pump according to claim 4, characterized in that: The bottom surface of the volute (1) is fixedly connected to an annular shell (19). An annular opening (110) is opened at the bottom of the inner sidewall of the annular shell (19). The outer ring body (43) is fitted into the annular opening (110). A pressure ring (111) is vertically fitted into the annular opening (110). Multiple lugs (113) are evenly fixed around the pressure ring (111). Multiple slots (112) are opened at the bottom sidewall of the annular opening (110) corresponding to the positions of the multiple lugs (113). The lugs (113) are inserted into the slots (112). 3) A threaded through hole (114) is vertically opened on the top surface of the groove (112), and a threaded hole (115) is opened on the top surface of the groove (112). The threaded through hole (114) and the threaded hole (115) are threaded to connect to the bolt (116). Multiple upper balls (117) are evenly rolled and connected to the top surface of the ring (110). The upper balls (117) roll and contact the top surface of the outer ring (43). Multiple lower balls (118) are evenly rolled and connected to the top surface of the pressure ring (111). The multiple lower balls (118) roll and contact the bottom surface of the outer ring (43).

6. A sewage pump according to claim 1, characterized in that: The bottom surface of the volute (1) is fixed to the base (119), and the shaft end of the submersible motor (2) is fixed to the top end of the main shaft (13).

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