A sewage pump

Abstract

This utility model provides a sewage pump, belonging to the field of water pump technology. It solves the problems of inconvenient and unstable installation of sewage pump bodies in the prior art. This utility model includes a pump casing, pump body, pump shaft, mounting plate, bearing housing, discharge pipe, and filter housing. The lower end of the mounting ring is fitted to the upper end of the pump body. A first connecting groove is formed in the middle of the connecting protrusion, and a bolt limiting groove is formed at the lower end of the connecting protrusion. A first fastening bolt passes through the mounting plate, passing through the first connecting groove, and its lower end is fitted to the upper surface of the bolt limiting groove for fixation. A first fastening nut is connected to the fastening bolt at the upper end of the mounting plate. A first connecting flange is installed on the upper end of the pump casing. This utility model has the advantages of convenient installation, high stability, and good lubrication of the bearing housing.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a sewage pump. Background Technology

[0002] Vertical sewage pumps are vertical pumps designed specifically for conveying sewage containing solid particles, fibers, and other impurities. They also feature overload and leakage protection, stable operation, and low maintenance costs. They are widely used in sewage treatment plants, residential communities, factory wastewater discharge, municipal engineering, and other fields, and are the core equipment for sewage lifting and transportation.

[0003] Chinese patent publication number CN210715284U discloses a sewage pump, including a pump body. The bottom of the pump body is provided with several connecting parts, which are evenly distributed around the central axis of the pump body. The ends of the connecting parts away from the bottom of the pump body are connected to a support plate. The cross-sectional area of ​​the support plate is larger than the cross-sectional area of ​​the bottom of the pump body. The connecting parts and the support plate are detachably connected. The side wall of the support plate is provided with several placement grooves corresponding to the connecting parts. The side wall of the placement groove near the center of the support plate is provided with threaded holes. Bolts are provided to mate with the threaded holes. When the end of the connecting part away from the pump body is placed in the corresponding placement groove, the end of the bolt passes through the corresponding connecting part and is threaded into the threaded hole.

[0004] The sewage pump provided by this patent lacks an effective positioning and stabilizing structure between the pump body and the connecting parts, making it inconvenient for precise and stable installation during actual use. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a sewage pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A sewage pump includes a pump casing, a pump body, a pump shaft, a mounting plate, a bearing housing, a discharge pipe, and a filter housing. The pump casing is cylindrical and has a mounting ring at its lower end. The lower end of the mounting ring is fitted to the upper end of the pump body. The pump body is volute-shaped and has several connecting protrusions on its outer periphery. The connecting protrusions are symmetrically arranged and have a first connecting groove in the middle. A bolt limiting groove is formed at the lower end of the middle of the connecting protrusion. Several fixing plates are provided at the upper end of the mounting ring. A first fastening bolt passes through the mounting plate and is connected to it. The fastening bolt passes through the first connecting groove and its lower end is fitted to the upper end face of the bolt limiting groove. A first fastening nut is connected to the fastening bolt at the upper end of the fixing plate. A first connecting flange is installed at the upper end of the pump casing. Several connecting feet are formed at the lower end of the bearing housing. The connecting feet are fitted to the first connecting flange and fixed by bolts. The pump shaft is installed inside the pump casing and the bearing housing and extends out of the upper end of the bearing housing.

[0007] In the aforementioned sewage pump, the mounting plate is installed on the outside of the pump casing at the lower end of the connecting flange. An outlet is formed on one side of the pump body. The discharge pipe is connected to the outlet and is arranged in a vertical structure. A slot is opened on one side of the mounting plate. The discharge pipe passes through the slot and extends out of the upper end of the mounting plate. A pipe positioning plate is fixedly installed on the upper end of the mounting plate inside the slot. Pipe limiting plates are installed on the front sides of both ends of the fixing plate. The pipe limiting plates are fitted and fixed to the outside of the discharge pipe.

[0008] In the aforementioned sewage pump, the bearing housing is sealed with an upper end cover and a lower end cover at its upper and lower ends, respectively. The upper end cover has a first oil injection channel inside, and a first oil injection nozzle is sealed and connected to the outside of the first oil injection channel.

[0009] In the aforementioned sewage pump, a second connecting flange is formed at the upper end of the bearing housing, and a plurality of reinforcing ribs are formed between the second connecting flange and the bearing housing. A through second oil injection channel is provided in the reinforcing ribs, and a second oil injection nozzle is sealed and connected to the outside of the second oil injection channel.

[0010] In the aforementioned sewage pump, a third oil injection channel is provided near the lower end of the bearing housing, and a third oil injection nozzle is sealed and connected to the outside of the third oil injection channel.

[0011] In the aforementioned sewage pump, a connecting plate is formed at the lower end of the pump body, and a gap structure is formed between the upper end of the connecting plate and the lower end of the pump body. A plurality of second connecting grooves are provided in the connecting plate. The upper end of the filter housing is fitted with the lower end of the connecting plate. Second fastening bolts are inserted and fixed in the second connecting grooves and the filter housing. A second fastening nut is fixed at the lower end of the second fastening bolts.

[0012] Compared with the prior art, the sewage pump provided by this utility model has the following beneficial effects: 1. The first fastening bolt passes directly through the first connecting groove of the connecting protrusion, and its lower end fits and is positioned with the bolt limiting groove. No additional alignment or calibration is required. When disassembling, simply unscrew the first fastening nut at the upper end of the mounting plate to separate the pump casing from the pump body, which is convenient for assembly and disassembly. 2. The upper and lower end covers of the bearing housing are sealed and installed at the top and bottom respectively. The upper end cover is provided with a first oil injection channel, the second connecting flange is provided with a second oil injection channel with a second oil injection nozzle, and a third oil injection channel and a third oil injection nozzle are provided near the lower end of the bearing housing. The segmented oil injection design can complete lubrication maintenance without disassembling the entire bearing housing. 3. The bearing housing is fixed to the pump casing by the connecting feet and the first connecting flange bolts. When it is necessary to inspect the pump shaft or bearing, the bearing housing and the pump casing can be separated simply by removing the bolts at the connecting feet. There is no need to move the entire equipment, which improves the flexibility of disassembly and assembly. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the connection between the pump casing and the pump body; Figure 3 This is a schematic diagram of the exploded structure of the bearing housing; Figure 4 This is a schematic diagram of the connection between the pump body and the filter housing.

[0014] In the diagram: 1. Pump casing; 11. Mounting ring; 12. First connecting flange; 2. Pump body; 21. Connecting protrusion; 211. First connecting groove; 212. Bolt limiting groove; 22. Outlet; 23. Connecting plate; 24. Second connecting groove; 25. Second fastening bolt; 26. Second fastening nut; 3. Pump shaft; 4. Mounting plate; 41. Slot; 42. Pipe positioning plate; 43. Pipe limiting plate; 5. Bearing housing; 51. Connecting foot; 52. Upper end cover; 521. First oil injection channel; 53. Lower end cover; 54. First oil injection nozzle; 55. Second connecting flange; 56. Reinforcing rib; 57. Second oil injection channel; 58. Second oil injection nozzle; 59. Third oil injection channel; 50. Third oil injection nozzle; 6. Discharge pipe; 7. Filter housing; 8. Fixing plate; 81. First fastening bolt; 82. First fastening nut. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figures 1 to 4 As shown, this embodiment includes a pump casing 1, a pump body 2, a pump shaft 3, a mounting plate 4, a bearing housing 5, a discharge pipe 6, and a filter housing 7. The pump casing 1 has a cylindrical structure and an integrally formed mounting ring 11 at its lower end. The lower end of the mounting ring 11 is tightly fitted to the upper end of the pump body 2 to ensure the sealing of the connection.

[0017] like Figures 1 to 4As shown, the pump body 2 adopts a volute-shaped structure design, with three connecting protrusions 21 symmetrically distributed on its outer periphery. Each connecting protrusion 21 has a through first connecting groove 211 in the middle, and a bolt limiting groove 212 connected to the first connecting groove 211 is opened at the lower middle end of the connecting protrusion 211. Several fixing plates 8 are fixedly installed at the upper end of the mounting ring 11 corresponding to the position of the connecting protrusion 21. A first fastening bolt 81 is passed through the fixing plate 8 and fixedly attached to the upper end face of the bolt limiting groove 212 after passing through the first connecting groove 211. A first fastening nut 82 is threadedly connected to the first fastening bolt 81 at the upper end of the fixing plate 8. By tightening the first fastening nut 82, a stable connection between the pump shell 1 and the pump body 2 can be achieved, which is convenient for assembly and precise for positioning.

[0018] like Figure 4 As shown, a connecting plate 23 is integrally formed at the lower end of the pump body 2. A gap structure is formed between the upper end of the connecting plate 23 and the lower end of the pump body 2 to provide installation space for the second fastening bolt 25. Several second connecting grooves 24 are provided in the connecting plate 23. The upper end of the filter housing 7 is tightly fitted with the lower end of the connecting plate 23. The second fastening bolt 25 is fixed through and fixed in the corresponding positions of the second connecting grooves 24 and the filter housing 7. The lower end of the second fastening bolt 25 is threaded with a second fastening nut 26. The filter housing 7 can be detached and installed through the cooperation of the second fastening bolt 25 and the second fastening nut 26, which is convenient for later cleaning or replacement of the filter housing 7.

[0019] like Figures 1 to 3 As shown, a first connecting flange 12 is fixedly installed on the upper end of the pump casing 1, and several connecting feet 51 are integrally formed on the lower end of the bearing housing 5. After the connecting feet 51 are attached to the upper surface of the first connecting flange 12, they are fixedly connected by bolts to ensure the connection stability between the bearing housing 5 and the pump casing 1. The pump shaft 3 is installed inside the pump casing 1 and the bearing housing 5 and extends upward to the upper end of the bearing housing 5 to provide a structural foundation for power transmission.

[0020] To elaborate further, such as Figure 1 and Figure 2 As shown, the mounting plate 4 is fixedly installed on the outside of the pump casing 1 at the lower end of the first connecting flange 12. The pump body 2 has an outlet 22 integrally formed on one side. The discharge pipe 6 is sealed to the outlet 22 and is arranged in a vertical structure. A slot 41 adapted to the discharge pipe 6 is opened on one side of the mounting plate 4. The discharge pipe 6 passes through the slot 41 and extends upward to the upper end of the mounting plate 4. A pipe positioning plate 42 is fixedly installed on the upper end of the mounting plate 4 inside the slot 41. Pipe limiting plates 43 are symmetrically installed on the front sides of both ends of the fixing plate 8. The pipe limiting plates 43 are tightly fitted and fixed to the outside of the discharge pipe 6. Through the cooperation of the pipe positioning plate 42 and the pipe limiting plate 43, the shaking of the discharge pipe 6 can be effectively restricted, and the stability of the pipe connection can be improved.

[0021] To elaborate further, such as Figure 1 and Figure 3 As shown, the bearing housing 5 has an upper end cover 52 and a lower end cover 53 sealed at its upper and lower ends respectively by sealing elements. The upper end cover 52 has a first oil injection channel 521 inside, and a first oil injection nozzle 54 is sealed to the outside of the first oil injection channel 521 to facilitate the injection of lubricating oil into the bearing structure inside the upper end cover 52. The upper end of the bearing housing 5 has a second connecting flange 55 integrally formed. Several reinforcing ribs 56 are evenly distributed between the second connecting flange 55 and the outer wall of the bearing housing 5. A through second oil injection channel 57 is opened in the reinforcing rib 56. A second oil injection nozzle 58 is sealed to the outside of the second oil injection channel 57 to inject oil into the bearing assembly in the middle of the bearing housing 5. In addition, a third oil injection channel 59 is opened near the lower end of the bearing housing 5. A third oil injection nozzle 50 is sealed to the outside of the third oil injection channel 59 to achieve lubrication of the lower bearing structure. The multi-oil injection structure design can ensure good lubrication effect of each rotating part inside the bearing housing 5.

[0022] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0023] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A sewage pump, comprising a pump casing (1), a pump body (2), a pump shaft (3), a mounting plate (4), a bearing housing (5), a discharge pipe (6), and a filter housing (7), characterized in that: The pump casing (1) is cylindrical and has a mounting ring (11) at its lower end. The lower end of the mounting ring (11) fits against the upper end of the pump body (2). The pump body (2) is volute-shaped and has several connecting protrusions (21) on its outer periphery. The connecting protrusions (21) are symmetrically arranged and have a first connecting groove (211) in the middle. The lower end of the connecting protrusion (21) has a bolt limiting groove (212). Several fixing plates (8) are provided at the upper end of the mounting ring (11). A first fastener is inserted through the mounting plate (4). Bolt (81), the fastening bolt passes through the first connecting groove (211) and the lower end of the first fastening bolt (81) is attached to the upper end face of the bolt limiting groove (212) for fixation. The fastening bolt at the upper end of the fixing plate (8) is connected to the first fastening nut (82). The upper end of the pump housing (1) is equipped with the first connecting flange (12). The lower end of the bearing housing (5) is formed with a plurality of connecting feet (51). The connecting feet (51) are attached to the first connecting flange (12) and fixed by bolts. The pump shaft (3) is installed inside the pump housing (1) and the bearing housing (5) and extends out of the upper end of the bearing housing (5).

2. A sewage pump according to claim 1, characterized in that: The mounting plate (4) is installed on the outside of the pump casing (1) at the lower end of the connecting flange. A water outlet (22) is formed on one side of the pump body (2). The discharge pipe (6) is connected to the water outlet (22) and the discharge pipe (6) is arranged in a vertical structure. A slot (41) is opened on one side of the mounting plate (4). The discharge pipe (6) passes through the slot (41) and extends out of the upper end of the mounting plate (4). A pipe positioning plate (42) is fixedly installed on the upper end of the mounting plate (4) inside the slot (41). Pipe limiting plates (43) are installed on the front side of both ends of the fixing plate (8). The pipe limiting plates (43) are attached and fixed to the outside of the discharge pipe (6).

3. A sewage pump according to claim 1, characterized in that: The bearing housing (5) is sealed with an upper end cover (52) and a lower end cover (53) at its upper and lower ends respectively. The upper end cover (52) has a first oil injection channel (521) inside, and a first oil injection nozzle (54) is sealed to the outside of the first oil injection channel (521).

4. A sewage pump according to claim 1, characterized in that: A second connecting flange (55) is formed at the upper end of the bearing housing (5). A plurality of reinforcing ribs (56) are formed between the second connecting flange (55) and the bearing housing (5). A through second oil injection channel (57) is provided in the reinforcing rib (56). A second oil injection nozzle (58) is sealed and connected to the outside of the second oil injection channel (57).

5. A sewage pump according to claim 1, characterized in that: The bearing housing (5) has a third oil injection channel (59) near its lower end, and a third oil injection nozzle (50) is sealed to the outside of the third oil injection channel (59).

6. A sewage pump according to claim 1, characterized in that: A connecting plate (23) is formed at the lower end of the pump body (2). A gap structure is formed between the upper end of the connecting plate (23) and the lower end of the pump body (2). A plurality of second connecting grooves (24) are provided in the connecting plate (23). The upper end of the filter housing (7) is in contact with the lower end of the connecting plate (23). Second fastening bolts (25) are fixed through the second connecting grooves (24) and the filter housing (7). A second fastening nut (26) is fixed at the lower end of the second fastening bolts (25).

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