Spiral impeller submersible slurry pump with guide vane type delivery chamber

Abstract

The utility model provides a spiral impeller submersible slurry pump with guide vane type delivery chambers, which is characterized in that a motor sealing component (2) is mounted at the output end of a mining flame-proof submersible motor (1), an overflowing component is fixed on the motor sealing component (2), seven guide vane type delivery chambers (5) are uniformly arranged at the outlet of a spiral impeller (6) of the overflowing component, and the guide vane type delivery chambers (5) are fixed on the motor sealing component (2). The spiral impeller (6) improves the overflowing performance, meanwhile, the guide vane type delivery chamber (5) can reduce impact abrasion of a high-speed slurry medium to a volute or a pump shell of the submersible slurry pump, in addition, the motor cooling assembly is fixed to an upper end cover of the mining explosion-proof submersible motor (1), the mining explosion-proof submersible motor (1) is cooled and cooled through the slurry medium, and the service life of the mining explosion-proof submersible motor (1) is prolonged. The water absorption filter cover (7) is installed at the inlet end of the motor cooling assembly, and the stirring assembly is installed at the shaft end of the mining explosion-proof submersible motor (1) and used for stirring a slurry medium entering the spiral impeller (6), so that stable operation of the submersible slurry pump is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of submersible slurry pump technology, specifically to a spiral impeller submersible slurry pump with a guide vane discharge chamber. Background Technology

[0002] Submersible slurry pumps are devices used to transport slurries containing solid particles. They mainly consist of a motor, impeller, pump casing, sealing device, and bearing assembly. Submersible slurry pumps typically adopt an integrated structure, combining the motor and pump body together. This results in a compact structure, small footprint, easy installation and maintenance, and effectively reduces pump leakage points and improves sealing performance. They are widely used in industries such as mining, coal, power, construction, and chemicals.

[0003] Currently, submersible slurry pump impellers are typically classified as conventional closed, semi-open, and open impellers. Regardless of the impeller type, when submersible slurry pumps transport high-concentration, high-viscosity fluid media, or gas-liquid, solid-liquid, or even three-phase mixtures, the inherent defects of closed, semi-open, and open impellers, such as narrow flow channels and limited flow capacity, easily lead to impeller flow channel blockage. Once impeller flow channel blockage occurs, it will seriously affect the overall service life of the submersible slurry pump. Furthermore, in the operation of commonly used submersible slurry pumps, the slurry transported by the impeller flows out of the impeller outlet and enters the pump casing or volute, and is then transported to the drainage pipe. Due to the high velocity and large flow rate of the slurry flowing out of the impeller outlet, it causes significant impact wear on the pump casing or volute, directly limiting the service life of the submersible slurry pump.

[0004] In view of this, in order to meet the transportation requirements of submersible slurry pumps for conveying special slurries with large particles, high concentration, high viscosity and high gas content, a submersible slurry pump impeller with large flow channel and high flow capacity is needed. In addition, combined with the design concept of guide vane discharge chamber structure, there is an urgent need for a spiral impeller submersible slurry pump with guide vane discharge chamber. Utility Model Content

[0005] This utility model proposes a submersible slurry pump with a spiral impeller and a guide vane discharge chamber. The impeller of this submersible slurry pump adopts a spiral impeller structure and, combined with the design concept of the guide vane discharge chamber, a guide vane discharge chamber structure that matches the spiral impeller has been developed, replacing the volute or pump casing structure of the submersible slurry pump. This solves the technical problems of easy clogging of the impeller and impact wear of the volute (or pump casing) in the submersible slurry pump.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A spiral impeller submersible slurry pump with a guide vane discharge chamber includes a mining explosion-proof submersible motor, a motor sealing assembly, a motor cooling assembly, a flow assembly, a stirring assembly, and a water suction filter cover. The motor sealing assembly is bolted to the output end of the mining explosion-proof submersible motor. The flow assembly is fixed to the motor sealing assembly with double-ended bolts. The motor cooling assembly is bolted to the upper end cover of the mining explosion-proof submersible motor. The water suction filter cover is installed at the inlet end of the motor cooling assembly. The stirring assembly passes through the inlet of the flow assembly and is installed at the output end of the mining explosion-proof submersible motor.

[0007] Furthermore, the motor sealing assembly includes a bearing assembly and a lubrication sealing assembly. The bearing assembly fixes the output shaft of the mine explosion-proof submersible motor through a deep groove ball bearing and a bearing body. The lubrication sealing assembly is located at the end of the motor sealing assembly. The lubrication sealing assembly is equipped with an O-ring seal and a skeleton oil seal. The O-ring seal structure seals the sealing end cover of the lubrication sealing assembly with the assembly housing, and the skeleton oil seal structure seals the sealing end cover of the lubrication sealing assembly with the output shaft of the mine explosion-proof submersible motor. The O-ring seal and skeleton oil seal in the lubrication sealing assembly can prevent the slurry pumped by the submersible slurry pump from entering the motor sealing assembly, and can also effectively suppress the leakage of lubricating medium in the motor sealing assembly.

[0008] Furthermore, the motor cooling assembly includes a fixed cover and a flow tank. The fixed cover is installed on the upper part of the mine explosion-proof submersible motor through a threaded hole at the end. The flow tank is connected to the fixed cover through a connecting flange at the end. A conical water inlet is provided at the bottom of the flow tank, and a water outlet is provided in the middle of the flow tank. A connecting flange is provided at the water outlet, and the diameter of the water outlet is larger than the diameter of the water inlet at the bottom of the flow tank.

[0009] Furthermore, the flow-through assembly includes a rear guard plate, guide vane-type discharge chambers, and a spiral impeller. The rear guard plate is fixed to the bottom of the motor sealing assembly by double-ended bolts. The spiral impeller is installed on the output shaft of the mine explosion-proof submersible motor by key connection. Seven guide vane-type discharge chamber structures are evenly installed on the rear guard plate by fixing bolts. The base platform of the guide vane-type discharge chamber is flush with the flow-through surface of the spiral impeller cover plate. A gap is provided between the top surface of the guide vane-type discharge chamber and the inner wall of the flow-through barrel of the motor cooling assembly. The hub of the spiral impeller is conical, and the spiral blades of the spiral impeller have a radial and axial double-twisted structure. The spiral blades of the spiral impeller are five in number and evenly distributed on the hub of the spiral impeller.

[0010] Furthermore, the stirring assembly includes an impeller clamping nut, a stirring rod, and a stirring impeller. The impeller clamping nut is installed between the spiral impeller and the stirring rod. The stirring rod is fixed to the shaft end of the mine explosion-proof submersible motor by a threaded connection. The spiral impeller is fixed to the output end of the mine explosion-proof submersible motor by the impeller clamping nut. The stirring impeller is fixed to the end of the stirring rod by a key connection. Three stirring blades with a certain inclination angle are evenly arranged on the stirring impeller hub, and the stirring impeller hub is spindle-shaped.

[0011] Compared with existing technologies, the submersible slurry pump with a guide vane discharge chamber described in this utility model has two advantages: First, the suction filter can prevent large solid particles from entering the flow assembly, avoiding blockage of the spiral impeller flow channel caused by large solid particles. Second, the stirring assembly can ensure uniform mixing of the slurry medium entering the spiral impeller, preventing uneven radial force caused by uneven slurry medium entering the spiral impeller flow channel, thus ensuring stable operation of the submersible slurry pump. Furthermore, the extension length of the stirring rod can be effectively adjusted by changing the axial length of the impeller clamping nut, adapting to different applications. The pump operates under different conditions; third, the special flow channel structure design of the spiral impeller expands the flow capacity of the flow channel, effectively improving the anti-clogging performance of the spiral impeller; fourth, the guide vane type discharge chamber structure can maximize the conversion of the velocity energy of the slurry medium flowing out of the spiral impeller outlet into pressure energy, while avoiding the impact and wear of the high-speed slurry medium on the volute or pump casing of the submersible slurry pump, effectively extending the service life of the submersible slurry pump; fifth, the motor cooling component can remove the heat generated by the explosion-proof submersible motor during operation, avoiding high temperature conditions in the explosion-proof submersible motor and ensuring the safe and stable operation of the whole machine. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 for Figure 1 Full sectional view at point KK;

[0014] Figure 3 This is an assembly structure diagram of the guide vane type extrusion chamber and the rear guard plate of this utility model;

[0015] Figure 4 for Figure 3 The left view;

[0016] Figure 5 This is a schematic diagram of the structure of the stirring head of this utility model.

[0017] The markings in the diagram are as follows: 1: Explosion-proof submersible motor for mining; 2: Motor sealing assembly; 31: Fixing cover; 32: Flow tank; 4: Rear guard plate; 41: Fixing bolt; 5: Guide vane type discharge chamber; 6: Spiral impeller; 61: Spiral blade; 7: Water suction filter cover; 8: Impeller clamping nut; 9: Agitator rod; 10: Agitator impeller; 101: Agitator blade; 102: Agitator impeller hub; 11: Water outlet. Detailed Implementation

[0018] 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.

[0019] 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:

[0020] See appendix Figure 1-5 The present invention discloses a submersible slurry pump with a guide vane discharge chamber, comprising a mining explosion-proof submersible motor 1, a motor sealing assembly 2, a motor cooling assembly, a flow assembly, a stirring assembly, and a suction filter 7. The motor sealing assembly 2 is bolted to the output end of the mining explosion-proof submersible motor 1 to prevent the slurry pumped by the submersible slurry pump from entering the interior of the mining explosion-proof submersible motor 1, and to seal the bearing lubricating oil of the motor sealing assembly 2. The flow assembly is fixed to the motor sealing assembly 2 with double-ended bolts. The motor cooling assembly is bolted to the upper end cover of the mining explosion-proof submersible motor 1. The suction filter 7 is installed at the inlet end of the motor cooling assembly. The stirring assembly passes through the inlet of the flow assembly and is installed at the output end of the mining explosion-proof submersible motor 1.

[0021] As a preferred embodiment, see the attached document. Figure 1The motor sealing assembly 2 includes a bearing assembly and a lubrication sealing assembly. The bearing assembly fixes the output shaft of the mine explosion-proof submersible motor 1 through a deep groove ball bearing and a bearing body. The lubrication sealing assembly is located at the end of the motor sealing assembly 2. The lubrication sealing assembly is equipped with an O-ring seal and a skeleton oil seal. The O-ring seal structure seals the sealing end cover of the lubrication sealing assembly with the assembly housing, and the skeleton oil seal structure seals the sealing end cover of the lubrication sealing assembly with the output shaft of the mine explosion-proof submersible motor 1. The O-ring seal and skeleton oil seal in the lubrication sealing assembly can prevent the slurry transported by the submersible slurry pump from entering the motor sealing assembly 2, and can also effectively suppress the leakage of the lubricating medium in the motor sealing assembly 2.

[0022] As a preferred embodiment, see the attached document. Figure 1 The motor cooling assembly includes a fixed cover 31 and a flow tank 32. The fixed cover 31 is installed on the upper part of the mine explosion-proof submersible motor 1 through a threaded hole at the end. The flow tank 32 is connected to the fixed cover 31 through a connecting flange at the end. A conical water inlet is provided at the bottom of the flow tank 32, and a water outlet 11 is provided in the middle of the flow tank 32. A connecting flange is provided at the water outlet 11, and the diameter of the water outlet 11 is larger than the diameter of the water inlet at the bottom of the flow tank 32. The fixed cover 31 and the flow tank 32 form a flow cavity. When the submersible slurry pump is running, the flow cavity formed by the fixed cover 31 and the flow tank 32 is filled with the slurry transported by the submersible slurry pump, which can promptly remove the heat generated by the mine explosion-proof submersible motor 1 during operation, thus playing a cooling and protection role.

[0023] As a preferred embodiment, see the attached document. Figure 1-4 The flow-through assembly includes a rear guard plate 4, a guide vane type discharge chamber 5, and a spiral impeller 6. The rear guard plate 4 is fixed to the bottom of the motor sealing assembly 2 by double-headed bolts. The spiral impeller 6 is installed on the output shaft of the mine explosion-proof submersible motor 1 by key connection. Seven guide vane type discharge chambers 5 are evenly installed on the rear guard plate 4 by fixing bolts 41. The base platform of the guide vane type discharge chamber 5 is flush with the flow-through surface of the cover plate of the spiral impeller 6. A gap is set between the top surface of the guide vane type discharge chamber 5 and the inner wall surface of the flow-through barrel 32 of the motor cooling assembly. The hub of the spiral impeller 6 is conical. The spiral blades 61 of the spiral impeller 6 have a radial and axial double twisted structure. There are 5 spiral blades 61 of the spiral impeller 6, which are evenly distributed on the hub of the spiral impeller 6.

[0024] As a preferred embodiment, see the attached document. Figure 3 and 4The guide vane type discharge chamber 5 of the flow-through component is fixed to the rear guard plate 4 of the flow-through component by bolts, which facilitates the disassembly and installation of the guide vane type discharge chamber 5 of the flow-through component. At the same time, according to the changes in the operating conditions of the submersible slurry pump, the angle of the guide vane type discharge chamber 5 of the flow-through component can be appropriately adjusted to change the flow capacity of the guide vane type discharge chamber 5 of the flow-through component, thereby effectively expanding the operating conditions of the submersible slurry pump.

[0025] As a preferred embodiment, see the attached document. Figure 5 The stirring assembly includes an impeller clamping nut 8, a stirring rod 9, and a stirring impeller 10. The impeller clamping nut 8 is installed between the spiral impeller 6 and the stirring rod 9. The stirring rod 9 is fixed to the end of the shaft of the mine explosion-proof submersible motor 1 by a threaded connection. The spiral impeller 6 is fixed to the output end of the mine explosion-proof submersible motor 1 by the impeller clamping nut 8. The extension length of the stirring rod 9 can be effectively adjusted by changing the axial length of the impeller clamping nut 8. The stirring impeller 10 is fixed to the end of the stirring rod 9 by a key connection. Three stirring blades 101 with a certain inclination angle are evenly arranged on the stirring impeller hub 102. The stirring impeller hub 102 is spindle-shaped. When the stirring blades 101 rotate, they can stir the slurry medium in real time to make it uniform. At the same time, the stirring blades 101 with a certain inclination angle can drive the slurry medium into the inlet of the spiral impeller 6, which can improve the cavitation resistance of the spiral impeller 6.

[0026] As a preferred embodiment, the submersible slurry pump with a guide vane discharge chamber described in this utility model is operated such that the entire submersible slurry pump is submerged in the slurry medium. The mine explosion-proof submersible motor 1 drives the spiral impeller 6 and the stirring impeller 10 to rotate. The slurry medium entering the water suction filter hood 7 first forms a uniform slurry medium under the stirring action of the stirring impeller 10, and then flows into the spiral impeller 6 through the inlet at the bottom of the flow tank 32 of the motor cooling assembly. Under the rotation of the spiral impeller 6, the high-speed slurry medium flows out from the outlet of the spiral impeller 6 and into the guide vane discharge chamber 5, and then enters the cavity between the mine explosion-proof submersible motor 1 and the motor cooling assembly. The slurry medium cools down the mine explosion-proof submersible motor 1 and then discharges into the drainage pipe through the water outlet 11.

[0027] 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 a guide vane discharge chamber, comprising a mine explosion-proof submersible motor (1), a motor sealing assembly (2), a motor cooling assembly, a flow-through assembly, a stirring assembly, and a water suction filter cover (7), characterized in that: The motor sealing assembly (2) is bolted to the output end of the mine explosion-proof submersible motor (1). The flow-through assembly is fixed to the motor sealing assembly (2) with double-headed bolts. The motor cooling assembly is bolted to the upper end cover of the mine explosion-proof submersible motor (1). The water suction filter cover (7) is installed at the inlet end of the motor cooling assembly. The stirring assembly passes through the inlet of the flow-through assembly and is installed at the output end of the mine explosion-proof submersible motor (1).

2. A submersible slurry pump with a guide vane discharge chamber according to claim 1, characterized in that: The motor sealing assembly (2) includes a bearing assembly and a lubrication sealing assembly. The bearing assembly fixes the output shaft of the mine explosion-proof submersible motor (1) through a deep groove ball bearing and a bearing body. The lubrication sealing assembly is located at the end of the motor sealing assembly (2). The lubrication sealing assembly is equipped with an O-ring seal and a skeleton oil seal.

3. A submersible slurry pump with a guide vane discharge chamber according to claim 1, characterized in that: The motor cooling assembly includes a fixed cover (31) and a flow tank (32). The fixed cover (31) is installed on the upper part of the mine explosion-proof submersible motor (1) through a threaded hole at the end. The flow tank (32) is connected to the fixed cover (31) through a connecting flange at the end. A conical water inlet is provided at the bottom of the flow tank (32). A water outlet (11) is provided in the middle of the flow tank (32). A connecting flange is provided at the water outlet (11), and the diameter of the water outlet (11) is larger than the diameter of the water inlet provided at the bottom of the flow tank (32).

4. A submersible slurry pump with a guide vane discharge chamber according to claim 1, characterized in that: The flow assembly includes a rear guard plate (4), a guide vane type discharge chamber (5), and a spiral impeller (6). The rear guard plate (4) is fixed to the bottom of the motor sealing assembly (2) by double-headed bolts. The spiral impeller (6) is installed on the output shaft of the mine explosion-proof submersible motor (1) by key connection. The seven guide vane type discharge chambers (5) are evenly installed on the rear guard plate (4) by fixing bolts (41). The base platform of the guide vane type discharge chamber (5) is flush with the flow surface of the spiral impeller (6) cover plate. A gap is set between the top surface of the guide vane type discharge chamber (5) and the inner wall of the flow tank (32) of the motor cooling assembly. The hub of the spiral impeller (6) is conical. The spiral blades (61) of the spiral impeller (6) have a radial and axial double twist structure. The spiral blades (61) of the spiral impeller (6) are 5 in number and evenly distributed on the hub of the spiral impeller (6).

5. A submersible slurry pump with a guide vane discharge chamber according to claim 1, characterized in that: The mixing assembly includes an impeller clamping nut (8), a mixing rod (9), and a mixing impeller (10). The impeller clamping nut (8) is installed between the spiral impeller (6) and the mixing rod (9). The mixing rod (9) is fixed to the end of the shaft of the mine explosion-proof submersible motor (1) by a threaded connection. The spiral impeller (6) is fixed to the output end of the mine explosion-proof submersible motor (1) by the impeller clamping nut (8). The mixing impeller (10) is fixed to the end of the mixing rod (9) by a key connection. Three mixing blades (101) with a certain inclination angle are evenly arranged on the mixing impeller hub (102). The mixing impeller hub (102) is spindle-shaped.

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