Submersible slurry pump with streamline non-clogging spiral impeller

Abstract

The utility model provides a submersible slurry pump with a streamline non-clogging spiral impeller, which is characterized in that a bearing assembly (2) is fixed at the output end of a motor (1), a pump body fixing plate (3) and an impeller rear partition plate (4) are sequentially mounted on the lower end surface of the bearing assembly (2), and a spiral volute (5) is mounted on the pump body fixing plate (3); the streamline non-clogging spiral impeller (6) is installed at the output shaft end of the motor (1) through a threaded hole of a hub of the streamline non-clogging spiral impeller (6), the water outlet elbow flange (10) is connected with a water outlet flange of the spiral volute (5), the upper end of the pressing and fixing assembly makes contact with the top of the motor (1), and the lower end of the pressing and fixing assembly is fixed to the lower end face of the spiral volute (5) through a bolt. The submersible slurry pump has high overflowing capacity, meanwhile, the pressing and fixing assembly is adopted, the motor (1) is cooled, the shell of the motor (1) is prevented from being eroded, and the whole submersible slurry pump is simple in structure and easy to manufacture and maintain.

Description

Technical Field

[0001] This utility model relates to the field of submersible slurry pump technology, specifically to a submersible slurry pump with a streamlined, non-clogging spiral impeller. Background Technology

[0002] Submersible slurry pumps consist of a motor, impeller, pump casing, sealing device, and bearing assembly. They typically adopt an integrated structure, are compact, occupy little space, and are easy to install and maintain. They are fluid machines used to transport media containing solid particles or high-concentration, high-viscosity fluids, and are widely used in industries such as mining, urban wastewater treatment, coal power, and chemical engineering.

[0003] Currently, submersible slurry pumps integrate the motor and pump body into a flow-through cylinder structure. This means that the fluid medium containing solid particles or high concentrations and viscosity discharged from the pump body passes through the motor housing within the flow-through cylinder before entering the discharge pipe. This design effectively removes heat generated during motor operation, preventing overheating from prolonged operation. However, because the fluid medium containing solid particles or high concentrations and viscosity discharged from the pump body is under high speed and pressure, it exhibits strong erosion and abrasion characteristics, easily causing irreversible damage to the motor housing. Furthermore, current submersible slurry pumps typically use a closed impeller structure. The narrow flow channel of a closed impeller limits its flow capacity, making it prone to clogging when conveying fluids containing large solid particles or high concentrations and viscosity. Additionally, submersible slurry pumps with closed impeller structures are difficult to maintain, have high manufacturing costs, and require sophisticated flow channel structures.

[0004] Therefore, in order to meet the requirements of submersible slurry pumps for conveying fluid media containing large solid particles or high concentration and high viscosity, while avoiding the erosion and wear of the motor housing by integrated submersible slurry pumps, and improving the flow capacity of the flow components of submersible slurry pumps, as well as improving the overall stability and reliability of submersible slurry pumps, there is an urgent need for a submersible slurry pump with a streamlined, non-clogging spiral impeller. Utility Model Content

[0005] This utility model proposes a submersible slurry pump with a streamlined, non-clogging spiral impeller. The streamlined, non-clogging spiral impeller replaces the closed impeller structure, solving the technical problems of narrow flow channels and limited flow capacity of closed impellers. Furthermore, the motor, pump body, and base are fixed by clamping struts to prevent erosion and wear of the motor housing by high-speed, high-pressure fluid media.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A submersible slurry pump with a streamlined, non-clogging spiral impeller includes a motor, a bearing assembly, a pump body fixing plate, an impeller rear partition, a spiral volute, a streamlined, non-clogging spiral impeller, a clamping and fixing assembly, and an outlet elbow flange. The bearing assembly is fixed to the output end of the motor with bolts. The pump body fixing plate and the impeller rear partition are sequentially bolted to the lower end face of the bearing assembly. The spiral volute is bolted to the pump body fixing plate. The streamlined, non-clogging spiral impeller is installed at the output shaft end of the motor through a threaded hole in its hub. The outlet elbow flange is connected to the outlet flange of the spiral volute through its end flange. The upper end of the clamping and fixing assembly contacts the top of the motor, and the lower end of the clamping and fixing assembly is bolted to the lower end face of the spiral volute.

[0007] Furthermore, the streamlined, non-clogging spiral impeller includes spiral blades, a rear cover plate, and back blades. The rear cover plate consists of a spindle-shaped conical hub structure and an annular disc structure. Two spiral blades are symmetrically arranged on the flow end face of the rear cover plate. The inlet edge of the spiral blade is flush with the top of the conical hub of the rear cover plate, and the outlet edge of the spiral blade is flush with the outer circular surface of the annular disc structure of the rear cover plate. Eight back blades are evenly arranged on the back side of the rear cover plate. The negative pressure surface of the back blades is at a certain angle to the back side of the rear cover plate, and the positive pressure surface of the back blades is perpendicular to the back side of the rear cover plate.

[0008] Furthermore, the clamping and fixing assembly includes an upper support plate, a lower support plate, clamping rods, and a base. The upper support plate is installed on the top of the motor through its inner hole. The lower support plate and the base are jointly fixed to the lower end face of the spiral volute by bolts. The upper support plate and the lower support plate are connected by four clamping rods, which clamp the motor, sealing assembly, and pump body assembly. The base has a conical structure with several flow holes on it. The diameter of the flow holes matches the inlet diameter of the spiral volute.

[0009] Furthermore, the vertical direct contact surface between the impeller rear partition and the spiral volute is a conical surface, an annular boss structure is provided on the outer circle of the impeller rear partition, the upper end face of the spiral volute is flush with the annular boss structure on the outer circle of the impeller rear partition, and an O-ring sealing structure is provided between the impeller rear partition and the spiral volute to improve the sealing performance between the two.

[0010] Furthermore, the inner bore surface of the impeller rear baffle is provided with a labyrinth sealing groove structure, and the outer circular surface of the streamlined non-clogging spiral impeller that mates with the impeller rear baffle is also provided with a labyrinth sealing groove structure. The labyrinth sealing groove structure on the inner bore surface of the impeller rear baffle and the labyrinth sealing groove structure of the streamlined non-clogging spiral impeller are both coated with a nickel-based hard alloy layer to improve their wear resistance.

[0011] Furthermore, the bearing assembly includes a deep groove ball bearing, a sealing cavity, and a sealing end cap. The deep groove ball bearing is installed at the upper end of the bearing assembly, and the sealing end cap is fixed to the lower end of the bearing assembly by screws. The sealing cavity is filled with lubricating oil or grease, and a skeleton oil seal structure is provided between the sealing end cap and the motor shaft.

[0012] Compared with existing technologies, the submersible slurry pump with a streamlined, non-clogging spiral impeller described in this utility model adopts a structure of clamping and fixing components. The motor, pump body, and base are fixed by clamping struts, and with the spiral volute structure, contact between the high-speed, high-pressure fluid medium and the motor housing is avoided, solving the technical problem of erosion and wear of the motor housing. Furthermore, the use of a streamlined, non-clogging spiral impeller to replace the closed impeller structure increases the flow capacity of the submersible slurry pump and also improves the cavitation resistance of the streamlined, non-clogging spiral impeller. Compared with the currently common submersible slurry pump structure, the submersible slurry pump described in this utility model has a simple structure and is easy to manufacture and maintain. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a top view of the present invention;

[0015] Figure 3 This is a partially enlarged view of the present invention;

[0016] Figure 4 This is a front view of the streamlined, non-clogging spiral impeller of this utility model;

[0017] Figure 5 This is a rear view of the streamlined, non-clogging spiral impeller of this utility model.

[0018] The markings in the diagram are as follows: 1: Motor; 2: Bearing assembly; 3: Pump body fixing plate; 4: Impeller rear partition plate; 5: Spiral volute; 6: Streamlined non-clogging spiral impeller; 61: Spiral blade; 62: Rear cover plate; 63: Back blade; 71: Lower support plate; 72: Upper support plate; 8: Base; 9: Clamping rod; 10: Outlet elbow flange. Detailed Implementation

[0019] In the description of this utility model, it should be noted that the terms "left", "right", "front", "rear", "inner", "outer", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] To make the technical problem to be solved, the technical solution and the implementation effect of this utility model clearer, the following is in conjunction with the appendix. Figure 1-5 An embodiment of the present invention will be further described below:

[0021] See appendix Figure 1-5 As a preferred embodiment, the submersible slurry pump with a streamlined, non-clogging spiral impeller of this utility model includes a motor 1, a bearing assembly 2, a pump body fixing plate 3, an impeller rear partition 4, a spiral volute 5, a streamlined, non-clogging spiral impeller 6, a clamping and fixing assembly, and an outlet elbow flange 10. The bearing assembly 2 is fixed to the output end of the motor 1 by bolts. The pump body fixing plate 3 and the impeller rear partition 4 are sequentially installed on the lower end face of the bearing assembly 2 by bolts. The spiral volute 5 is installed on the pump body fixing plate 3 by bolts. The streamlined, non-clogging spiral impeller 6 is installed at the output shaft end of the motor 1 through the threaded hole in its hub. The outlet elbow flange 10 is connected to the outlet flange of the spiral volute 5 through its end flange. The upper end of the clamping and fixing assembly contacts the top of the motor 1, and the lower end of the clamping and fixing assembly is fixed to the lower end face of the spiral volute 5 by bolts.

[0022] As a preferred embodiment, see Appendix Figure 4 and 5The streamlined, non-clogging spiral impeller 6 includes spiral blades 61, a rear cover plate 62, and back blades 63. The rear cover plate 62 consists of a spindle-shaped conical hub structure and an annular disk structure. Two spiral blades 61 are symmetrically arranged on the flow-through end face of the rear cover plate 62. The inlet edge of the spiral blades 61 is flush with the top of the conical hub of the rear cover plate 62, and the inlet edge of the spiral blades 61 extends to the inlet of the spiral volute 5. This not only agitates the fluid medium but also increases the flow capacity of the streamlined, non-clogging spiral impeller 6, thus improving the performance of the streamlined, non-clogging spiral impeller. The impeller 6 has good cavitation resistance. The outlet of the spiral blade 61 is flush with the outer surface of the annular disk structure of the rear cover plate 62. Eight back blades 63 are evenly arranged on the back of the rear cover plate 62. The negative pressure surface of the back blades 63 is at a certain angle to the back of the rear cover plate 62, and the positive pressure surface of the back blades 63 is perpendicular to the back of the rear cover plate 62. Under the rotation of the streamlined non-clogging spiral impeller 6, the back blades 63 can discharge the fluid medium on the back of the rear cover plate 62 to the outlet of the streamlined non-clogging spiral impeller 6, reducing the fluid medium pressure and leakage at the hub.

[0023] As a preferred embodiment, see Appendix Figure 1 , 2 In section 3, the clamping and fixing assembly includes an upper support plate 72, a lower support plate 71, clamping rods 9, and a base 8. The upper support plate 72 is installed on the top of the motor 1 through its inner hole. The lower support plate 71 and the base 8 are jointly fixed to the lower end face of the spiral volute 5 by bolts. The upper support plate 72 and the lower support plate 71 are connected by four clamping rods 9. The four clamping rods 9 clamp the motor 1, the sealing assembly, and the pump body assembly, making the entire unit a whole. This reduces the damage to the motor 1 caused by the weight of the bearing assembly 2 and the pump body assembly, and avoids the damage to the motor 1 and the bearing assembly 2 caused by the vibration generated during the operation of the pump body assembly, thereby improving the stability and reliability of the whole machine. In addition, the base 8 has a conical structure, and several flow holes are provided on the conical structure of the base 8. The diameter of the flow holes matches the inlet diameter of the spiral volute 5.

[0024] As a preferred embodiment, see Appendix Figure 1 and 3 The vertical direct contact surface between the impeller rear partition 4 and the spiral volute 5 is a conical surface, which improves the positioning and fitting accuracy between the two and enhances their sealing performance. In addition, an annular boss structure is provided on the outer circle of the impeller rear partition 4, and the upper end face of the spiral volute 5 is flush with the annular boss structure on the outer circle of the impeller rear partition 4. An O-ring sealing structure is provided between the impeller rear partition 4 and the spiral volute 5 to further improve the sealing performance between the two and reduce leakage.

[0025] As a preferred embodiment, see Appendix Figure 1 and 3The inner bore surface of the impeller rear baffle 4 is provided with a labyrinth sealing groove structure, and the outer circular surface of the streamlined non-clogging spiral impeller 6 that mates with the impeller rear baffle 4 is also provided with a labyrinth sealing groove structure. The labyrinth sealing groove structure on the inner bore surface of the impeller rear baffle 4 and the labyrinth sealing groove structure on the streamlined non-clogging spiral impeller 6 work together to provide a seal, reducing the leakage of high-speed, high-pressure fluid medium at the outlet of the streamlined non-clogging spiral impeller 6. Furthermore, both the labyrinth sealing groove structure on the inner bore surface of the impeller rear baffle 4 and the labyrinth sealing groove structure on the streamlined non-clogging spiral impeller 6 are coated with a nickel-based hard alloy layer, improving their wear resistance.

[0026] As a preferred embodiment, see Appendix Figure 1 The bearing assembly 2 includes a deep groove ball bearing, a sealing cavity, and a sealing end cap. The deep groove ball bearing is installed at the upper end of the bearing assembly 2, and the sealing end cap is fixed to the lower end of the bearing assembly 2 by screws. The sealing cavity is filled with lubricating oil or grease. A skeleton oil seal structure is provided between the sealing end cap and the shaft of motor 1, which not only prevents the leakage of lubricating oil or grease in the sealing cavity, but also prevents fluid media from entering the sealing cavity, ensuring the normal operation of the bearing assembly 2.

[0027] In the submersible slurry pump with a streamlined, non-clogging spiral impeller, during normal operation, the fluid medium enters the base 8 through the flow hole of the base 8 and, under the rotation of the streamlined, non-clogging spiral impeller 6, forms a high-speed, high-pressure fluid medium that enters the outlet elbow flange 10 and is discharged to the designated location. During this process, the flow holes of the base 8 can prevent excessively large solid particles or impurities from entering the non-clogging spiral impeller. At the same time, the conical flow structure of the non-clogging spiral impeller can greatly improve its flow capacity and reduce the probability of solid particles clogging the flow channel of the non-clogging spiral impeller. In addition, under the combined action of the labyrinth seal structure of the inner hole of the impeller rear baffle 4, the labyrinth seal structure of the non-clogging spiral impeller, and the back blade 63 of the non-clogging spiral impeller, the leakage of the whole machine can be reduced and the operating efficiency of the submersible slurry pump can be improved. Furthermore, the clamping and fixing component structure adopted ensures that the motor 1 of the submersible slurry pump is immersed in the liquid and in contact with the fluid medium, which cools the motor 1 and avoids the contact between the high-speed and high-pressure fluid medium of the pump body components and the motor 1 housing, thus avoiding the erosion and wear of the motor 1 housing by the high-speed and high-pressure fluid medium and effectively extending the service life of the motor 1.

[0028] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A submersible slurry pump with streamlined non-clog helical impeller, comprising a motor (1), a bearing assembly (2), a pump body fixing plate (3), an impeller back baffle (4), a spiral volute (5), a streamlined non-clog helical impeller (6), a pressing fixing assembly and a water outlet elbow flange (10), characterized in that: The bearing assembly (2) is fixed to the output end of the motor (1) by bolts, the pump body fixing plate (3) and the impeller rear baffle (4) are installed at the lower end surface of the bearing assembly (2) by bolts in sequence, the spiral volute (5) is installed on the pump body fixing plate (3) by bolts, the streamlined non-blocking spiral impeller (6) is installed at the output shaft end of the motor (1) through the threaded hole of the hub, the water outlet elbow flange (10) is connected with the water outlet flange of the spiral volute (5) through the flange at the end, the upper end of the compression fixing assembly is in contact with the top of the motor (1), and the lower end of the compression fixing assembly is fixed to the lower end surface of the spiral volute (5) by bolts.

2. The flow line non-clog volute type impeller submersible slurry pump as claimed in claim 1 wherein: The streamlined non-blocking spiral impeller (6) comprises spiral blades (61), a rear cover plate (62) and back blades (63), the rear cover plate (62) is composed of a conical hub structure and an annular disc structure, two spiral blades (61) are symmetrically arranged on the flow end surface of the rear cover plate (62), the inlet edge of the spiral blade (61) is flush with the top of the conical hub of the rear cover plate (62), the outlet of the spiral blade (61) is flush with the outer circular surface of the annular disc structure of the rear cover plate (62), and eight back blades (63) are uniformly arranged on the back surface of the rear cover plate (62).

3. The stream line non-clog volute type submersible slurry pump as claimed in claim 1 wherein: The compression fixing assembly comprises an upper support plate (72), a lower support plate (71), compression string levers (9) and a base (8), the upper support plate (72) is installed on the top of the motor (1) through the inner hole, the lower support plate (71) and the base (8) are fixed to the lower end surface of the spiral volute (5) by bolts, the upper support plate (72) and the lower support plate (71) are connected by four compression string levers (9), the base (8) is in a conical structure, and a plurality of flow holes are arranged on the conical structure of the base (8).

4. The stream line clog free volute screw impeller type submersible slurry pump as claimed in claim 1 wherein: The vertical contact surface between the impeller rear baffle (4) and the spiral volute (5) is a conical surface, an annular boss structure is arranged at the outer circle of the impeller rear baffle (4), the upper end surface of the spiral volute (5) is flush with the outer circular annular boss structure of the impeller rear baffle (4), and an O-ring sealing structure is arranged between the impeller rear baffle (4) and the spiral volute (5).

5. The stream line clog free volute screw impeller type submersible slurry pump as claimed in claim 1 wherein: The inner hole surface of the impeller rear baffle (4) is provided with a labyrinth sealing groove structure, the outer circular surface of the streamlined non-blocking spiral impeller (6) matched with the impeller rear baffle (4) is provided with a labyrinth sealing groove structure, and the labyrinth sealing groove structures of the inner hole surface of the impeller rear baffle (4) and the streamlined non-blocking spiral impeller (6) are both coated with a nickel-based hard alloy layer.

6. The stream line clog free volute screw impeller type submersible slurry pump as claimed in claim 1 wherein: The bearing assembly (2) comprises a deep groove ball bearing, a sealing cavity and a sealing end cover, the deep groove ball bearing is installed at the upper end of the bearing assembly (2), the sealing end cover is fixed to the lower end of the bearing assembly (2) by screws, and a skeleton oil seal structure is arranged between the sealing end cover and the shaft of the motor (1).

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