A shielded self-priming booster pump

Abstract

The present invention discloses a shielded self-priming booster pump, comprising a pump housing, a booster pipe and a water pump rotor, wherein a water inlet interface is provided at the right end of the pump housing, a right positioning isolation sleeve is provided in the pump housing, the right end of the booster pipe is tightly connected with the right positioning isolation sleeve, a fixed sleeve fixes the left end of the booster pipe and there is a gap between the fixed sleeve and the booster pipe, the water pump rotor is located in the booster pipe, and the rotating shaft of the water pump rotor is installed on the bearing seat through a bearing; a pressure regulating hole is provided on the sleeve wall of the right positioning isolation sleeve, a check valve is provided at the pressure regulating hole, and the check valve is used to prevent the water in the right positioning isolation sleeve from flowing out into the pump housing, while the water in the pump housing can flow into the right positioning isolation sleeve under a set water pressure. Since a pressure regulating hole is provided on the sleeve wall of the right positioning isolation sleeve, and a check valve is provided at the pressure regulating hole, the water in the pump housing can flow into the right positioning isolation sleeve under a set water pressure, thereby automatically adjusting the water pressure inside and outside the booster pipe to ensure the normal operation of the booster pump.

Description

Technical Field

[0001] The invention relates to a water pump, in particular to a shielded self-priming booster pump. Background Art

[0002] The existing shielded self-priming booster pump generally adds a small diameter pipe on the periphery of the water pump rotor to play a role in boosting. However, the existing water pump rotor does not have the function of automatically adjusting the water pressure outside the pipe. Therefore, when working for a long time or when drainage obstacles occur, the water pressure in the pump will be too high, resulting in equipment damage.

[0003] The existing self-priming booster pump seat does not take corresponding measures. In actual work, when there is no water supply, the water pump itself will continue to idle. Long-term idling not only consumes electricity, but also easily causes motor damage.

[0004] After searching, it is found that in the prior art, a pressure switch is used to prevent the motor from idling without water. For example, the State Intellectual Property Office published a patent document with the publication number CN103573647A on February 12, 2014. A cold and hot water shielded self-priming booster pump includes a motor base plate, a motor is installed on the motor base plate, a pump shell is installed on the connection cover at the front end of the motor, a pressure tank and a pressure switch are installed on the pump shell, the front end of the motor barrel of the motor is installed with the connection cover, the rear end is installed with a rear cover, a rotor and a stator are installed inside the motor barrel, and a shielding sleeve is arranged on the outside of the rotor. The outer side of the above-mentioned motor barrel is covered with an outer barrel, and a positioning frame is installed at the lower part of the outer barrel, and the lower part of the positioning frame is screwed on the motor base plate. The above-mentioned pressure switch used turns off the motor when the water pressure is low. This pressure switch has the following defects: first, it is easy to be damaged after long-term use; second, the accuracy is poor. After a certain period of use, it will automatically trip and power off, and even fail to start normally. Therefore, the control switch needs to be improved to meet the needs of normal operation.

[0005] In addition, the bearing seat and flow channel in the existing water pump, the flow channel is installed in the pump body, and the bearing seat is installed at the port of the pump body. The above components have the following defects in actual installation and use: First, the two ends of the flow channel need to be fixed in the pump body, so the assembly time will be increased accordingly; second, the bearing seat is also called a baffle or end cover in the pump body, which is made of metal materials, which is not only costly, but also requires subsequent processing after the bearing seat is made to ensure accurate shaft hole coaxiality, so there are defects of labor-intensive and time-consuming, and low production efficiency; third, in the pump body, the water flowing out of the boost chamber or the boost pipe has an unstable water flow, and "cavitation" will occur in actual work, thereby affecting the service life. Summary of the invention

[0006] In order to overcome the above-mentioned shortcomings, the object of the present invention is to provide a shielded self-priming booster pump which can self-regulate the water pressure outside the booster pipe.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A shielded self-priming booster pump comprises a pump casing, a booster pipe and a water pump rotor, a water inlet interface is arranged at the right end of the pump casing, a right positioning isolation sleeve is arranged in the pump casing, the right positioning isolation sleeve is arranged on the inner wall surface of the right end of the pump casing, the water inlet interface is communicated with the right positioning isolation sleeve through a water flow port, a drainage pipe is arranged on the pump casing and near the water inlet interface, a plug is arranged at the port of the drainage pipe, a water outlet interface is opened on the side wall of the drainage pipe, a bearing seat is arranged at the left end of the pump casing, a fixing sleeve is arranged on the end surface of the bearing seat and located in the pump casing, the right end of the booster pipe is tightly connected with the right positioning isolation sleeve, and the fixing sleeve fixes the booster pipe The left end is fixed and there is a gap between the fixed sleeve and the boost pipe. The water pump rotor is located in the boost pipe. The rotating shaft of the water pump rotor is installed on the bearing seat through a bearing. Under the power of the water pump rotor, water enters the right positioning isolation sleeve through the water inlet interface, flows through the boost pipe, and flows out from the gap between the fixed sleeve and the boost pipe to the pump casing outside the boost pipe, and is discharged from the water outlet interface through the drainage pipe; a pressure regulating hole is opened on the sleeve wall of the right positioning isolation sleeve, and a check valve is arranged at the pressure regulating hole. The check valve is used to prevent the water in the right positioning isolation sleeve from flowing out into the pump casing, while the water in the pump casing can flow into the right positioning isolation sleeve under the set water pressure.

[0009] Furthermore, a limiting enclosure is provided on the inner wall surface of the right end of the pump housing and located at the periphery of the water flow outlet, and a fracture is provided on the limiting enclosure.

[0010] Furthermore, the pump housing is provided with a sewage outlet, a sealing cover is provided at the sewage outlet, and the sewage outlet corresponds to the pressure regulating hole.

[0011] Furthermore, a flow pressure sensor is installed on the side wall of the drainage pipe to detect the flow and pressure of water in the drainage pipe; a pressure buffer tank installation interface is provided on the side wall of the drainage pipe; a cross-shaped supporting foot is fixed to the lower end of the float; and a hexagonal hole for disassembly and assembly is provided on the upper end surface of the plug.

[0012] Furthermore, an anti-idling float switch is provided in the drainage pipe, and when there is no water in the pump casing, the anti-idling float switch turns off the motor of the pump.

[0013] Furthermore, the anti-idling floating switch includes a float, a guide frame, a permanent magnet and a magnetic induction switch. The magnetic induction switch is installed and fixed on the outer wall of the drainage pipe. The permanent magnet is arranged on the float. The upper end of the float is fixed on the guide frame. The float and the guide frame are arranged in the drainage pipe. When there is no water in the drainage pipe, the float and the guide frame move down along the drainage pipe. When the magnetic induction switch senses the permanent magnet, the motor of the pump is turned off. The guide frame includes a long strip, a connecting pipe and three limit plates. One end of the long strip is connected to the cross plate in the float, and the other end of the long strip is provided with a groove. Elastic arms are formed on both sides of the groove. The ends of the elastic arms are provided with hooks. The connecting pipe is inserted into the elastic arm and hooked by the hook. The three limit plates are evenly distributed on the periphery of the connecting pipe to make the connecting pipe in the center of the drainage pipe.

[0014] Furthermore, the lower end of the plug is connected to one end of three limit rods, the other end of the three limit rods is connected to a guide sleeve, the lower end of the connecting tube is connected to a sliding tube, the sliding tube is inserted into the guide sleeve and slides relative to the guide sleeve, and the diameter of the connecting tube is larger than the diameter of the guide sleeve, the limit plate is located between adjacent limit rods, and the function of the limit rod is to prevent the connecting tube from rotating.

[0015] Furthermore, it also includes a flow channel, which is installed in the pump housing. The bearing seat is a disc-shaped structure made of plastic, and the flow channel is a cylindrical flow channel made of plastic. One end of the flow channel is connected to the end face of the bearing seat, and the bearing seat and the flow channel are integrally formed by injection molding.

[0016] Furthermore, a plurality of flow stabilizers are distributed on the periphery of one end of the fixed sleeve; a plurality of partitions are distributed along the circumferential direction on the inner wall surface of the flow channel, the lengths of two adjacent partitions are different, the direction of the partition is parallel to the center line direction of the flow channel, and the side of the partition is connected to one end of the flow stabilizer.

[0017] Furthermore, one end of the flow stabilizer is arranged along the tangent direction of the circular port of the fixed sleeve, and the flow stabilizer gradually changes from short to long from one end to the other end along the center line direction of the flow channel; the flow stabilizer is an arc structure, and the gap between two adjacent flow stabilizers changes from narrow to wide starting from the fixed sleeve; the partition is an arc structure, and the partition and the flow stabilizer are connected in an arc-shaped smooth transition manner.

[0018] The beneficial effects of the present invention are:

[0019] Since a pressure regulating hole is opened on the sleeve wall of the right positioning isolation sleeve, and a check valve is arranged at the pressure regulating hole, the water in the pump housing can flow into the right positioning isolation sleeve under the set water pressure, so as to automatically adjust the water pressure outside the boosting pipe, which has a certain protective effect on the entire water pump to ensure the normal operation of the boosting pump; a limiting enclosure is arranged on the inner wall surface of the right end of the pump housing and located at the periphery of the water flow port, and a fracture is arranged on the limiting enclosure. The additional limiting enclosure is used to support one end of the boosting pipe to prevent one end of the boosting pipe from hitting the inner wall surface of the right end of the pump housing, so as to ensure a certain gap between one end of the boosting pipe and the inner wall surface of the right end of the pump housing, so as to ensure the smoothness of the water flow.

[0020] Since an anti-idling float switch is added in the drainage pipe, when there is no water in the pump casing, the anti-idling float switch will shut down the pump motor. In particular, the structural form of combining the float and the magnetic induction switch can accurately and effectively control the idling when there is no water, and has a long service life and will not cause the phenomenon of false start-up. Since the structural form of combining the guide frame and three limit rods is adopted, the float can only move along the drainage pipe, the purpose of which is to ensure that the permanent magnet and the magnetic induction switch can correspond accurately. Once the float rotates, the permanent magnet will deflect at an angle and move away from the magnetic induction switch, which will affect the sensing effect of the magnetic induction switch.

[0021] Since the bearing seat and the flow channel are both made of plastic, the bearing seat and the flow channel are integrally formed by injection molding, which not only simplifies the fixation of the flow channel, but also the injection-molded bearing seat has high dimensional accuracy, precise shaft-hole coaxiality, and does not require post-processing, thereby improving assembly efficiency and reducing manufacturing costs;

[0022] Since the flow stabilizing plate is added and the gap between two adjacent flow stabilizing plates is widened from the fixing sleeve, the flow stabilizing and buffering effects can be achieved, the occurrence of "cavitation" phenomenon is reduced, and the service life of the pump is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described with the aid of the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other accompanying drawings according to the following drawings without creative work:

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 for Figure 1 The stereogram shown;

[0026] Figure 3 for Figure 2 The schematic diagram of the structure inside the pump casing is shown;

[0027] Figure 4 for Figure 1 The structural diagram of the anti-idling float switch is shown;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure of the long strip shown;

[0029] Figure 6 for Figure 5 The top view shown;

[0030] Figure 7 for Figure 4 A schematic diagram of the structure of the guide frame shown;

[0031] Figure 8 for Figure 4 The schematic diagram of the structure in which the anti-idling floating switch is installed in the guide sleeve;

[0032] Fig. 9 for Figure 1 A three-dimensional view of the bearing housing and flow passage shown;

[0033] Fig.10 for Fig. 9 Rear view shown.

[0034] In the figure: 1. Pump housing; 2. Water inlet interface; 3. Drain pipe; 4. Plug; 5. Water outlet interface; 6. Anti-idling floating switch; 7. Flow pressure sensor; 8. Pressure buffer tank installation interface; 9. Drain outlet; 10. Cover; 11. Float; 12. Guide frame; 13. Permanent magnet; 14. Magnetic induction switch; 15. Long strip; 16. Connecting pipe; 17. Limit plate; 18. Cross plate; 19. Groove; 20. Elastic arm; 21. Hook; 22. Limit rod; 23. Guide sleeve; 24. Sliding pipe; 25. Cross-shaped support foot; 26. Hexagonal hole for disassembly and assembly; 27. Right positioning isolation sleeve; 28. Booster pipe; 29. ​​Pump rotor; 30. Fixed sleeve; 31. Bearing seat; 32. Flow channel; 33. Pressure regulating hole; 34. Check valve; 35. Water flow outlet; 36. Limit enclosure; 37. Break; 38. Flow stabilizing plate; 39. Partition. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "forward", "reverse", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0037] like Figure 1 , 2 As shown in Figure 3, a self-priming booster pump comprises a pump casing 1, a booster pipe 28 and a water pump rotor 29. A water inlet interface 2 is provided at the right end of the pump casing 1. A right positioning isolation sleeve 27 is provided in the pump casing 1. The right positioning isolation sleeve 27 is arranged on the inner wall surface of the right end of the pump casing 1. The water inlet interface 2 is communicated with the right positioning isolation sleeve 27 through a water flow port 35. A drainage pipe 3 is provided on the pump casing 1 and near the water inlet interface 2. A plug 4 is provided at the port of the drainage pipe 3. A water outlet interface 5 is opened on the side wall of the drainage pipe 3. A bearing seat 31 is provided at the left end of the pump casing 1. A fixing sleeve 30 is provided on the end surface of the bearing seat 31 and located in the pump casing 1. The right end of the booster pipe 28 is tightly connected with the right positioning isolation sleeve 27. The fixing sleeve 30 fixes the left end of the booster pipe 28. The end is fixed and there is a gap between the fixing sleeve 30 and the boost pipe 28. The water pump rotor 29 is located in the boost pipe 28. The rotating shaft of the water pump rotor 29 is installed on the bearing seat 31 through a bearing. Under the power of the water pump rotor 29, water enters the right positioning isolation sleeve 27 through the water inlet interface 2, flows through the boost pipe 28, and then flows out from the gap between the fixing sleeve 30 and the boost pipe 28 to the pump casing 1 outside the boost pipe 28, and is discharged from the water outlet interface 5 through the drainage pipe 3; a pressure regulating hole 33 is opened on the sleeve wall of the right positioning isolation sleeve 27, and a check valve 34 is provided at the pressure regulating hole 33. The check valve 34 is used to prevent the water in the right positioning isolation sleeve 27 from flowing out into the pump casing 1, while the water in the pump casing 1 can flow into the right positioning isolation sleeve 27 under the set water pressure.

[0038] A limiting plate 36 is provided on the inner wall surface of the right end of the pump housing 1 and at the periphery of the water flow port 35, and a break 37 is provided on the limiting plate 36. The limiting plate is provided to support one end of the boosting pipe 28 to prevent the one end of the boosting pipe 28 from hitting the inner wall surface of the right end of the pump housing 1, so as to ensure a certain gap between one end of the boosting pipe 28 and the inner wall surface of the right end of the pump housing 1, so as to ensure the smoothness of the water flow.

[0039] like Figure 4 , 5As shown in , 6 and 7, an anti-idling float switch 6 is provided in the drainage pipe 3. When there is no water in the pump housing, the anti-idling float switch turns off the pump motor. A flow pressure sensor 7 is installed on the side wall of the drainage pipe 3 to detect the flow and pressure of the water flow in the drainage pipe. A pressure buffer tank installation interface 8 is provided on the side wall of the drainage pipe 3. A sewage outlet 9 is provided on the pump housing 1, and a sealing cover 10 is provided at the sewage outlet 9. The sewage outlet 9 corresponds to the pressure regulating hole 33.

[0040] The anti-idling floating switch 6 includes a float 11, a guide frame 12, a permanent magnet 13 and a magnetic induction switch 14. The magnetic induction switch 14 is installed and fixed on the outer wall of the drainage pipe 3. The permanent magnet 13 is arranged on the float 11. The upper end of the float 11 is fixed on the guide frame 12. The float 11 and the guide frame 12 are arranged in the drainage pipe 3. When there is no water in the drainage pipe 3, the float 11 and the guide frame 12 move down along the drainage pipe 3. When the magnetic induction switch 14 senses the permanent magnet 13, the motor of the pump is turned off.

[0041] The guide frame 12 includes a long strip 15, a connecting pipe 16 and three limit plates 17. One end of the long strip 15 is connected to the cross plate 18 in the float 11. The other end of the long strip 15 is provided with a groove 19. Elastic arms 20 are formed on both sides of the groove 19. The ends of the elastic arms 20 are provided with hooks 21. The connecting pipe 16 is inserted into the elastic arm 20 and hooked by the hook 21. The three limit plates 17 are evenly distributed on the periphery of the connecting pipe 16 to ensure that the connecting pipe 16 is in the center of the drainage pipe 3.

[0042] like Figure 8 As shown, the lower end of the plug 4 is connected to one end of three limit rods 22, and the other end of the three limit rods 22 is connected to a guide sleeve 23. The lower end of the connecting pipe 16 is connected to a sliding pipe 24, which is inserted into the guide sleeve 23 and slides relative to the guide sleeve 23. The diameter of the connecting pipe 16 is larger than the diameter of the guide sleeve 23. The limit plate 17 is located between adjacent limit rods 22. The function of the limit rod 22 is to prevent the connecting pipe 16 from rotating by limiting the limit plate 17. A cross-shaped support foot 25 is fixed to the lower end of the floating body 11. A hexagonal hole 26 for disassembly and assembly is provided on the upper end surface of the plug 4.

[0043] like Figure 1 , 9, 10, it also includes a flow channel 32, which is installed in the pump housing 1. The bearing seat 31 is a disc-shaped structure made of plastic, and the flow channel 32 is a cylindrical flow channel made of plastic. One end of the flow channel 32 is connected to the end face of the bearing seat 31, and the bearing seat 31 and the flow channel 32 are integrally formed by injection molding. A plurality of flow stabilizers 38 are distributed on the periphery of one end of the fixing sleeve 30; a plurality of partitions 39 are distributed along the circumferential direction on the inner wall surface of the flow channel 32, and the lengths of two adjacent partitions 39 are different. The direction of the partition 39 is parallel to the center line direction of the flow channel 32, and the side of the partition 39 is connected to one end of the flow stabilizer 38.

[0044] One end of the flow stabilizer 38 is arranged along the tangent direction of the circular port of the fixing sleeve 30, and the flow stabilizer 38 gradually changes from short to long from one end to the other end along the center line direction of the flow channel; the flow stabilizer 38 is an arc structure, and the gap between two adjacent flow stabilizers 38 changes from narrow to wide starting from the fixing sleeve; the partition 39 is an arc structure, and the partition 39 and the flow stabilizer 38 are connected in an arc transition smooth manner.

[0045] In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradiction. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A shielded self-priming booster pump, comprising a pump housing, a booster pipe and a water pump rotor, wherein a water inlet interface is provided at the right end of the pump housing, a right positioning isolation sleeve is provided in the pump housing, the right positioning isolation sleeve is provided on the inner wall surface of the right end of the pump housing, the water inlet interface is communicated with the right positioning isolation sleeve through a water flow port, a drainage pipe is provided on the pump housing and near the water inlet interface, a plug is provided at the port of the drainage pipe, and a water outlet interface is provided on the side wall of the drainage pipe, characterized in that: A bearing seat is provided at the left end of the pump casing, and a fixing sleeve is provided on the end surface of the bearing seat and located in the pump casing. The right end of the boost pipe is tightly connected with the right positioning isolation sleeve, the fixing sleeve fixes the left end of the boost pipe and there is a gap between the fixing sleeve and the boost pipe, the water pump rotor is located in the boost pipe, and the rotating shaft of the water pump rotor is installed on the bearing seat through a bearing. Under the power of the water pump rotor, water enters the right positioning isolation sleeve through the water inlet interface, flows through the boost pipe, and flows out from the gap between the fixing sleeve and the boost pipe to the pump casing outside the boost pipe, and is discharged from the water outlet interface through the drainage pipe; a pressure regulating hole is opened on the sleeve wall of the right positioning isolation sleeve, and a check valve is provided at the pressure regulating hole. The check valve is used to prevent the water in the right positioning isolation sleeve from flowing out into the pump casing, while the water in the pump casing can flow into the right positioning isolation sleeve under the set water pressure.

2. The shielded self-priming booster pump according to claim 1, characterized in that: A limiting enclosure is provided on the inner wall surface of the right end of the pump housing and located at the periphery of the water flow outlet, and a fracture is provided on the limiting enclosure.

3. The shielded self-priming booster pump according to claim 2, characterized in that: The pump housing is provided with a sewage outlet, a sealing cover is provided at the sewage outlet, and the sewage outlet corresponds to the pressure regulating hole.

4. The shielded self-priming booster pump according to claim 3 is characterized in that: A flow pressure sensor is installed on the side wall of the drainage pipe to detect the flow and pressure of water in the drainage pipe; a pressure buffer tank installation interface is provided on the side wall of the drainage pipe; and a hexagonal hole for disassembly and assembly is provided on the upper end surface of the plug.

5. The shielded self-priming booster pump according to any one of claims 1 to 4, characterized in that: An anti-idling float switch is arranged in the drainage pipe. When there is no water in the pump casing, the anti-idling float switch turns off the motor of the pump.

6. The shielded self-priming booster pump according to claim 5, characterized in that: The anti-idling floating switch includes a float, a guide frame, a permanent magnet and a magnetic induction switch. The magnetic induction switch is installed and fixed on the outer wall of the drainage pipe. The permanent magnet is arranged on the float. The upper end of the float is fixed on the guide frame. The float and the guide frame are arranged in the drainage pipe. When there is no water in the drainage pipe, the float and the guide frame move down along the drainage pipe. When the magnetic induction switch senses the permanent magnet, the motor of the pump is turned off; the guide frame includes a long strip, a connecting pipe and three limit plates. One end of the long strip is connected to the cross plate in the float, and the other end of the long strip is provided with a groove. Elastic arms are formed on both sides of the groove. The ends of the elastic arms are provided with hooks. The connecting pipe is inserted into the elastic arm and hooked by the hook. The three limit plates are evenly distributed on the periphery of the connecting pipe to make the connecting pipe in the center of the drainage pipe; a cross-shaped supporting foot is fixed to the lower end of the float.

7. The shielded self-priming booster pump according to claim 6, characterized in that: The lower end of the plug is connected to one end of the three limit rods, the other ends of the three limit rods are connected to the guide sleeves, the lower end of the connecting tube is connected to the sliding tube, the sliding tube is inserted into the guide sleeve and slides relative to the guide sleeve, and the diameter of the connecting tube is larger than the diameter of the guide sleeve, the limit plate is located between adjacent limit rods, and the function of the limit rod is to prevent the connecting tube from rotating.

8. The shielded self-priming booster pump according to claim 7, characterized in that: It also includes a flow channel, which is installed in the pump housing. The bearing seat is a disc-shaped structure made of plastic. The flow channel is a cylindrical flow channel made of plastic. One end of the flow channel is connected to the end face of the bearing seat, and the bearing seat and the flow channel are integrally formed by injection molding.

9. The shielded self-priming booster pump according to claim 8, characterized in that: A plurality of flow stabilizers are distributed on the periphery of one end of the fixed sleeve; a plurality of partitions are distributed along the circumferential direction on the inner wall surface of the flow channel, the lengths of two adjacent partitions are different, the direction of the partition is parallel to the center line direction of the flow channel, and the side of the partition is connected to one end of the flow stabilizer.

10. The shielded self-priming booster pump according to claim 9, characterized in that: One end of the flow stabilizer is arranged along the tangent direction of the circular port of the fixing sleeve, and the flow stabilizer gradually changes from short to long from one end to the other end along the center line direction of the flow channel; the flow stabilizer is an arc structure, and the gap between two adjacent flow stabilizers changes from narrow to wide starting from the fixing sleeve; the partition is an arc structure, and the partition and the flow stabilizer are connected in an arc-shaped transition and smooth connection.

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