Long-shaft submerged magnetic drive centrifugal pump

Abstract

The utility model discloses a long shaft submerged magnetic drive centrifugal pump which comprises a motor, a rotating shaft, an impeller, a shell and a water outlet pipe, the motor drives the rotating shaft to rotate, the rotating shaft is rotatably connected with the shell, the impeller is installed at the lower end of the rotating shaft, the shell comprises a fixed shell and an impeller shell, a cavity is formed in the fixed shell and the impeller shell, the impeller is located in the cavity, and the fixed shell is provided with a groove. At least part of the impeller is located in the groove, a cavity channel is formed between the impeller and the groove, the impeller shell comprises an outlet, the outlet is connected with a water outlet pipe, the water outlet pipe is provided with a branch pipe, the branch pipe is connected with a plurality of flow dividing pipes, the fixed shell is provided with a plurality of channels, the flow dividing pipes are connected with the channels, and the flow dividing pipes are communicated with the cavity channel. Solid particles between the fixed shell and the impeller are discharged out of the cavity channel through media flowing into the branch pipes, and the solid particles are prevented from being accumulated in the cavity channel to abrade the impeller and the fixed shell.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic centrifugal pumps, and more specifically to a long-axis submerged magnetic drive centrifugal pump. Background Art

[0002] In the prior art, the long-axis pump is a type of centrifugal pump. From the perspective of a centrifugal pump, it is an improvement on the performance of a submersible pump. The pump can be used to transport liquids such as rainwater, iron oxide water, sewage, corrosive industrial wastewater, and seawater. The centrifugal force generated by the rotation of the impeller at the lower end of the rotating shaft sends the medium out of the outlet pipe. Due to the presence of solid particles in the medium under special circumstances, the solid particles will enter between the impeller and the casing of the fixed impeller, causing wear of the impeller and the casing. Therefore, a technical solution is needed to solve the above problem. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art, to effectively prevent particles from entering between the impeller and the casing, and to provide a long-axis submerged magnetic drive centrifugal pump.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a long-axis submerged magnetic-driven centrifugal pump, comprising a motor, a rotating shaft, an impeller, a casing, and a water outlet pipe. The motor drives the rotating shaft to rotate, and the rotating shaft is rotatably connected to the casing. The impeller is installed at the lower end of the rotating shaft. The casing comprises a fixed shell and an impeller casing. A cavity is formed inside the fixed shell and the impeller casing. The impeller is located in the cavity. The fixed shell is provided with a groove. The impeller is at least partially located in the groove. A cavity is formed between the impeller and the groove. The impeller casing comprises an outlet, the outlet is connected to the water outlet pipe, the water outlet pipe is provided with a branch pipe, the branch pipe is connected to a plurality of shunt pipes, the fixed shell is provided with a plurality of channels, the shunt pipes are connected to the channels, and the shunt pipes are connected to the cavity.

[0006] Furthermore, the impeller includes a base, blades, and a water inlet pipe. The blades are distributed in a ring shape on the base, the base is at least partially located in the groove, the water inlet pipe is fixedly installed on the blades, the impeller shell includes an inlet, and the water inlet pipe is at least partially located in the inlet.

[0007] Furthermore, the fixed shell includes a cover plate, the fixed shell is provided with a first annular groove, the first annular groove is located on the side of the fixed shell away from the impeller, the channel connects the first annular groove and the cavity, the cover plate closes the first annular groove, the cover plate is provided with a plurality of connecting ports, the shunt pipe is connected to the connecting ports, and the connecting ports connect the shunt pipe and the first annular groove.

[0008] Furthermore, the fixed shell is provided with a convex ring, the impeller is provided with a second annular groove, the convex ring is located in the second annular groove, and the convex ring and the second annular groove are located on a side of the channel close to the rotating shaft.

[0009] Furthermore, the water outlet pipe includes a first pipe fitting and a second pipe fitting, the branch pipe is located in the first pipe fitting, one end of the second pipe fitting is connected to the first pipe fitting, and the other end of the second pipe fitting extends upward.

[0010] Furthermore, the branch pipe is connected to one end of the connecting pipe, the other end of the connecting pipe is connected to a plurality of the diversion pipes, and a filter bucket is installed at one end of the connecting pipe connected to the branch pipe.

[0011] Furthermore, it includes a feed hopper, which is installed at the inlet. The feed hopper includes a conical sleeve and a net bucket. The small diameter end of the conical sleeve is connected to the inlet, and the large diameter end of the conical sleeve is connected to the net bucket.

[0012] Furthermore, a bottom plate is provided at the lower end of the net bucket, and the bottom plate is an arc-shaped plate, and the center of the bottom plate protrudes toward the inlet direction.

[0013] The beneficial effects of the utility model are:

[0014] The impeller portion of the utility model is located in the fixed shell, so that a cavity is formed between the impeller and the fixed shell. By arranging a branch pipe at the outlet pipe, the medium flowing into the branch pipe is used to discharge solid particles between the fixed shell and the impeller to the outside of the cavity, thereby preventing solid particles from accumulating in the cavity and wearing the impeller and the fixed shell. The centrifugal force is used to transport the medium to flush the cavity, thereby effectively preventing solid particles from entering between the impeller and the fixed shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of this embodiment.

[0016] Figure 2 Schematic diagram of a connection between the motor and the rotating shaft in this embodiment.

[0017] Figure 3 This is a schematic diagram of the connection between the impeller, casing, and water inlet pipe in this embodiment.

[0018] Figure numerals: 1, motor; 11, drive shaft; 12, magnetic frame; 121, magnetic block; 13, fixed sleeve; 2, mounting base; 21, cover; 3, rotating shaft; 31, magnetic ring; 4, housing; 41, fixed shell; 411, groove; 4111, cavity; 412, channel; 4121, first ring groove; 413, convex ring; 42, impeller shell; 421, inlet; 422, outlet ; 43. Cavity; 44. Cover plate; 441. Connection port; 5. Impeller; 51. Base; 511. Second ring groove; 52. Fan blade; 53. Water inlet pipe; 6. Water outlet pipe; 61. First pipe fitting; 611. Branch pipe; 612. Diverter pipe; 613. Connecting pipe; 614. Filter hopper; 62. Second pipe fitting; 7. Feed hopper; 71. Conical sleeve; 72. Net hopper; 721. Bottom plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figure 1 、 Figure 2 、 Figure 3 As shown, this embodiment discloses a long-axis submersible magnetic drive centrifugal pump, including a motor 1, a mounting base 2, a rotating shaft 3, a casing 4, an impeller 5, a water outlet pipe 6, and a feed hopper 7. The motor 1 includes a drive shaft 11, which is rotatably mounted on a fixed sleeve 13 through a bearing. The fixed sleeve 13 and the mounting base 2 are fixedly installed. A magnetic frame 12 is installed at one end of the drive shaft 11 located in the fixed sleeve 13. The inner wall of the magnetic frame 12 is provided with a plurality of magnetic blocks 121 distributed in an annular manner. The rotating shaft 3 is rotatably mounted on the mounting base 2 through a thrust bearing. The mounting base 2 includes a cover 21. The cover 21 covers the connecting part of the rotating shaft 3 and the mounting base 2 to play a protective role. A part of the rotating shaft 3 extends into the magnetic frame 12, and a part of the rotating shaft 3 located in the magnetic frame 12 is installed with a magnetic ring 31. The motor 1 drives the magnetic frame 12 to rotate, thereby driving the rotating shaft 3 to rotate.

[0021] The rotating shaft 3 is arranged vertically, and the shell 4 includes a fixed shell 41 and an impeller shell 42. The rotating shaft 3 is rotatably connected to the fixed shell 41. A cavity 43 is formed inside the fixed shell 41 and the impeller shell 42. The impeller 5 is installed at the lower end of the rotating shaft 3. The impeller 5 is located in the cavity 43. The fixed shell 41 is provided with a groove 411. The impeller 5 is at least partially located in the groove 411. The impeller 5 includes a base 51, blades 52, and a water inlet pipe 53. The blades 52 are distributed in a ring shape on the base 51. The base 51 is at least partially located in the groove 411. The water inlet pipe 53 is fixedly installed on the blades 52. A cavity 4111 is formed between the impeller 5 and the groove 411. The impeller 5 is partially located in the groove 411, which can minimize the gap between the impeller 5 and the fixed shell 41 and reduce the number of fixed particles entering the cavity 4111.

[0022] The fixed shell 41 includes a cover plate 44, which is provided with a first annular groove 4121 and a plurality of channels 412. The first annular groove 4121 is located on the side of the fixed shell 41 away from the impeller 5. The channel 412 is connected to the first annular groove 4121 and the cavity 4111. The cover plate 44 closes the first annular groove 4121. The cover plate 44 is provided with a plurality of connecting ports 441. The plurality of connecting ports 441 are connected to the first annular groove 4121. The impeller shell 42 includes an outlet 422. The outlet 422 is connected to the water outlet pipe 6. The water outlet pipe 6 is provided with a branch pipe 611. The branch pipe 611 is connected to a plurality of shunt pipes 612. The shunt pipe 612 is connected to the channel 4111. The shunt pipe 612 is connected to the connecting port 441, the connecting port 441 is connected to the shunt pipe 612 and the first annular groove 4121, the shunt pipe 612 is connected to the cavity 4111, and when the impeller 5 rotates, the impeller 5 generates centrifugal force on the medium in the cavity 43, and the medium flows to the outlet 422 and enters the water outlet pipe 6. Part of the medium in the water outlet pipe 6 flows into the multiple shunt pipes 612 through the branch pipe 611, and then the medium flows to the cavity 4111, which can flush the solid particles in the cavity 4111 out of the cavity 4111 and prevent the solid particles from entering the cavity 4111 when the impeller 5 rotates.

[0023] More preferably, the fixed shell 41 is provided with a convex ring 413, the impeller 5 is provided with a second annular groove 511, the convex ring 413 is located in the second annular groove 511, the convex ring 413 and the second annular groove 511 are located on the side of the channel 412 close to the rotating shaft 3, and a tortuous maze-like structure is formed between the convex ring 413 and the second annular groove 511, which can slow down the flow rate of the medium entering, so that most of the medium entering the cavity 4111 from the channel 412 can flow to the cavity 4111 away from the rotating shaft 3 and then flow to the cavity 43.

[0024] The outlet pipe 6 includes a first pipe fitting 61 and a second pipe fitting 62, the branch pipe 611 is located at the first pipe fitting 61, one end of the second pipe fitting 62 is connected to the first pipe fitting 61, and the other end of the second pipe fitting 62 extends upward. The branch pipe 611 is connected to one end of the connecting pipe 613, and the other end of the connecting pipe 613 is connected to multiple diversion pipes 612. A filter hopper 614 is installed at one end of the connecting pipe 613 connected to the branch pipe 611. The filter hopper 614 can filter the particles in the medium flowing to the diversion pipe 612 and remove the solid particles in the medium entering the cavity 4111 from the diversion pipe 612.

[0025] The water inlet pipe 53 is fixedly installed on the fan blade 52. The impeller housing 42 includes an inlet 421. The water inlet pipe 53 is at least partially located in the inlet 421. The water inlet pipe 53 can increase the negative pressure generated at the inlet 421 when the impeller 5 rotates, making the negative pressure generated at the inlet 421 more concentrated.

[0026] The feed hopper 7 is installed at the inlet 421. The feed hopper 7 can perform a first filtration on the medium entering the cavity 43 to filter out large particles of impurities. The feed hopper 7 includes a conical sleeve 71 and a net bucket 72. The small diameter end of the conical sleeve 71 is connected to the inlet 421, and the large diameter end of the conical sleeve 71 is connected to the net bucket 72. The conical sleeve 71 can increase the range of the medium sucked into the feed hopper 7, and the net bucket 72 can filter impurities. More preferably, a bottom plate 721 is provided at the lower end of the net bucket 72. The bottom plate 721 is an arc-shaped plate, and the center of the bottom plate 721 protrudes toward the inlet 421, which can increase the area of ​​the bottom plate 721. The protruding direction of the bottom plate 721 is the same as the direction in which the inlet 421 attracts the medium, which can better cooperate with the vortex attraction generated by the rotation of the impeller 5.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A long-axis submerged magnetic drive centrifugal pump, characterized in that: The invention comprises a motor (1), a rotating shaft (3), an impeller (5), a housing (4), and a water outlet pipe (6), wherein the motor (1) drives the rotating shaft (3) to rotate, the rotating shaft (3) is rotatably connected to the housing (4), the impeller (5) is mounted on the lower end of the rotating shaft (3), the housing (4) comprises a fixed shell (41) and an impeller shell (42), a cavity (43) is formed inside the fixed shell (41) and the impeller shell (42), the impeller (5) is located in the cavity (43), the fixed shell (41) is provided with a groove (411), the impeller ( 5) is at least partially located in the groove (411), a cavity (4111) is formed between the impeller (5) and the groove (411), the impeller shell (42) includes an outlet (422), the outlet (422) is connected to the water outlet pipe (6), the water outlet pipe (6) is provided with a branch pipe (611), the branch pipe (611) is connected to a plurality of shunt pipes (612), the fixed shell (41) is provided with a plurality of channels (412), the shunt pipes (612) are connected to the channels (412), and the shunt pipes (612) are in communication with the cavity (4111).

2. A long-axis submerged magnetic drive centrifugal pump according to claim 1, characterized in that: The impeller (5) includes a base (51), blades (52), and a water inlet pipe (53); the blades (52) are distributed in a ring shape on the base (51); the base (51) is at least partially located in the groove (411); the water inlet pipe (53) is fixedly installed on the blades (52); the impeller housing (42) includes an inlet (421); and the water inlet pipe (53) is at least partially located in the inlet (421).

3. The long-axis submerged magnetic drive centrifugal pump according to claim 1, characterized in that: The fixed shell (41) comprises a cover plate (44), the fixed shell (41) is provided with a first annular groove (4121), the first annular groove (4121) is located on a side of the fixed shell (41) away from the impeller (5), the channel (412) is connected to the first annular groove (4121) and the cavity (4111), the cover plate (44) closes the first annular groove (4121), the cover plate (44) is provided with a plurality of connecting ports (441), the shunt pipe (612) is connected to the connecting ports (441), and the connecting ports (441) are connected to the shunt pipe (612) and the first annular groove (4121).

4. The long-axis submerged magnetic drive centrifugal pump according to claim 1, characterized in that: The fixed shell (41) is provided with a convex ring (413), the impeller (5) is provided with a second annular groove (511), the convex ring (413) is located in the second annular groove (511), and the convex ring (413) and the second annular groove (511) are located on a side of the channel (412) close to the rotating shaft (3).

5. The long-axis submerged magnetic drive centrifugal pump according to claim 1, characterized in that: The water outlet pipe (6) comprises a first pipe member (61) and a second pipe member (62), the branch pipe (611) is located on the first pipe member (61), one end of the second pipe member (62) is connected to the first pipe member (61), and the other end of the second pipe member (62) extends upward.

6. The long-axis submersible magnetic drive centrifugal pump according to claim 1, characterized in that: The branch pipe (611) is connected to one end of the connecting pipe (613), the other end of the connecting pipe (613) is connected to a plurality of the diversion pipes (612), and a filter hopper (614) is installed at one end of the connecting pipe (613) connected to the branch pipe (611).

7. The long-axis submersible magnetic drive centrifugal pump according to claim 2, characterized in that: The invention comprises a feed hopper (7), wherein the feed hopper (7) is installed at the inlet (421), and the feed hopper (7) comprises a conical sleeve (71) and a net hopper (72), wherein a small-diameter end of the conical sleeve (71) is connected to the inlet (421), and a large-diameter end of the conical sleeve (71) is connected to the net hopper (72).

8. A long-axis submerged magnetic drive centrifugal pump according to claim 7, characterized in that: A bottom plate (721) is provided at the lower end of the net bucket (72), and the bottom plate (721) is an arc-shaped plate, and the center of the bottom plate (721) is convex toward the inlet (421).

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