Corrosion-resistant magnetic drive pump with compact structure

Abstract

The utility model relates to the technical field of pump manufacturing, in particular to a corrosion-resistant magnetic drive pump with a compact structure, which aims at solving the problems in the prior art that the pump is used for conveying strong corrosive media and long-distance conveying, and comprises a pump shell, an impeller arranged in the pump shell, a pump shaft arranged in the impeller, and a pump shell shaft supporting piece arranged at a pump inlet, a friction pair used for balancing axial force is arranged between the pump shell shaft supporting piece and an inlet of the impeller, an inner magnetic rotor is arranged in the impeller, an isolation sleeve assembly is arranged on the side, away from the pump inlet, of the pump shell, a support is arranged on one side of the isolation sleeve assembly, and an outer magnetic rotor matched with the inner magnetic rotor is arranged in the support. And the overall size is compact, the overall size of the pump is shortened, the pump is compact in structure, light and convenient to carry, and the problem that installation positions of some users are limited can be solved. The magnetic pump is adopted, and long-distance conveying can be achieved.

Description

Technical Field

[0001] This utility model relates to the field of pump manufacturing technology, specifically to a strong and corrosion-resistant magnetic pump for long-distance transportation. Background Technology

[0002] When conveying highly corrosive media such as 105% sulfuric acid, concentrated hydrochloric acid, and hydrofluoric acid, ordinary stainless steel pumps cannot withstand corrosion and have a short service life. Pumps made of special materials are expensive, making them unacceptable to users. Furthermore, under certain conditions, pumps are required to deliver goods over long distances, such as 80-120 meters, which ordinary pumps cannot meet. Magnetic drive pumps can achieve long-distance delivery, but current corrosion-resistant magnetic drive pumps are either structurally complex (such as the magnetic drive pump disclosed in CN202210177706X) or expensive (such as titanium alloy magnetic centrifugal pumps). Additionally, some users, due to installation space constraints, require pumps that are compact, lightweight, and easy to transport, issues that current magnetic drive pumps cannot address. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art of pumps for conveying highly corrosive media and the limitations of installation, and to provide a compact and corrosion-resistant magnetic pump.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A compact, corrosion-resistant magnetic pump includes a pump casing with a pump inlet on one side and a pump outlet. An impeller is housed inside the pump casing, and a pump shaft is housed within the impeller. A pump casing shaft support is installed at the pump inlet, and a friction pair for balancing axial forces is installed between the pump casing shaft support and the impeller inlet. An inner magnetic rotor is housed within the impeller. A liquid inlet is provided on the pump casing shaft support, and the inner side of the pump casing shaft support is adapted to one end of the pump shaft. An isolation sleeve assembly is installed on the side of the pump casing away from the pump inlet, and a bracket is installed on one side of the isolation sleeve assembly. An outer magnetic rotor adapted to the inner magnetic rotor is housed within the bracket, and the outer magnetic rotor is mounted on the power shaft of a motor. All flow passages within the pump casing are lined with corrosion-resistant inner liners.

[0006] Furthermore, the friction pair includes a rotating ring installed at the impeller inlet, and a stationary ring is installed on the side of the rotating ring near the pump casing shaft support.

[0007] Furthermore, the isolation sleeve assembly is located outside the impeller, and the isolation sleeve assembly includes an inner isolation sleeve, with an isolation sleeve reinforcing sleeve installed on the outside of the inner isolation sleeve.

[0008] Furthermore, a bearing is installed between the impeller and the pump shaft, and an isolation sleeve friction ring is provided on the side of the bearing near the inner sleeve of the isolation sleeve, and the isolation sleeve friction ring is installed on the pump shaft.

[0009] Furthermore, a shaft anti-rotation platform is provided at one end of the pump shaft near the pump casing shaft support, and an anti-rotation hole adapted to the shaft anti-rotation platform is provided inside the pump casing shaft support.

[0010] Furthermore, the impeller and the inner magnetic rotor are pressed together as one unit.

[0011] Furthermore, an impeller inlet ring is provided on the side of the impeller near the pump inlet, and the impeller inlet ring is adapted to the pump casing inlet ring provided in the pump casing liner. An anti-rotation block for the rotating ring is provided on the side of the impeller near the rotating ring, which cooperates with the rotating ring.

[0012] Furthermore, an isolation sleeve positioning platform is provided on the side of the inner sleeve away from the pump inlet, and the reinforcing sleeve of the isolation sleeve is provided with a reinforcing sleeve positioning hole that is adapted to the isolation sleeve positioning platform.

[0013] Furthermore, a limiting surface is provided on the side of the bearing near the friction ring of the isolation sleeve to prevent relative rotation between the bearing and the impeller.

[0014] Furthermore, the pump casing shaft support and the corrosion-resistant lining are an integral structure, and the pump casing shaft support is equipped with a metal support embedded part.

[0015] This utility model has the following beneficial effects:

[0016] This utility model has a simple structure. The rotor system of the pump is supported by a simply supported beam structure with two-end support. One end is set at the pump casing inlet as a support point, and the other end is set at the isolation sleeve assembly. This structure makes the support more reasonable, the operation more stable, and the overall size more compact, shortening the overall size of the pump. The pump has a compact structure, is lightweight and easy to transport, which can solve the problem of limited installation location for some users, and can also realize long-distance transportation.

[0017] This utility model uses a pump casing shaft support to support the rotor system, and sets a supporting metal embedded part in the pump casing shaft support to improve the strength and stability of the support.

[0018] The bearing of this invention is located in the middle part between the inner cavity of the inner magnetic rotor and the pump shaft, forming a rotating support pair. The pump shaft is stationary, so that the rotation support point is on the drive element and the pump shaft is supported at both ends. This structure of bearing has a good suspension effect, makes it easy to form a lubricating film, reduces friction and wear, improves the balance of operation and the service life of the pump.

[0019] All flow-through components of this invention are lined with an F46 inner layer, which improves the pump's corrosion resistance and reduces costs. The isolation sleeve assembly of this invention has a double-layer structure, which can withstand greater pressure and enables long-distance medium transport.

[0020] The stationary ring of this invention is made of silicon carbide, and a moving ring filled with PTFE and graphite is installed on the impeller to form a friction pair that can balance the axial force.

[0021] The impeller inlet ring of this invention fits into the pump casing inlet ring, and together with the stationary and moving rings, they balance the axial force, reduce leakage, and improve pump efficiency.

[0022] The impeller and internal magnetic rotor of this invention are a press-fitted integral structure, which not only reduces the overall size of the pump but also improves the stability of the rotor system. It also solves the problem of the impeller and internal magnetic rotor easily detaching in traditional structures. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the pump shaft of this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the bearing of this utility model.

[0026] Figure 4 This is a schematic diagram of the impeller and internal magnetic rotor of this utility model.

[0027] Figure 5 This is a schematic diagram of the structure of the inner sleeve of the isolation sleeve of this utility model.

[0028] Figure 6 This is a schematic diagram of the structure of the isolation sleeve and reinforcement sleeve of this utility model.

[0029] Figure 7 This is a schematic diagram of the pump casing of this utility model.

[0030] Figure 8 This is a schematic diagram of the structure of the bracket of this utility model.

[0031] The meanings of the reference numerals in the attached drawings are as follows: 1. Pump casing; 2. Stationary ring; 3. Rotating ring; 4. Impeller; 5. Bearing; 6. Pump shaft; 7. Inner sleeve of the isolation sleeve; 8. Reinforcing sleeve of the isolation sleeve; 9. Pump casing gasket; 10. Bracket; 11. Inner magnetic rotor; 12. Friction ring of the isolation sleeve; 13. Outer magnetic rotor; 14. Motor; 15. Base plate; 16. Shaft anti-rotation platform; 17. Limiting surface; 18. Rotating ring anti-rotation block; 19. Impeller inlet ring; 20. Isolation sleeve positioning platform; 21. Reinforcing sleeve positioning hole; 22. Pump casing shaft support; 23. Metal support embedded part; 24. Pump casing inlet ring; 25. Bracket foot; 26. Liquid inlet; 27. Anti-rotation hole. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1-8 As shown, a compact, corrosion-resistant magnetic pump includes a pump casing 1. A pump inlet is located on one side of the pump casing 1, and a pump outlet is also provided on the pump casing 1 (the side of the pump casing 1 is the pump inlet, and the top of the pump casing 1 is the pump outlet). An impeller 4 is installed inside the pump casing 1. An impeller inlet ring 19 is located on the side of the impeller 4 near the pump inlet. The impeller inlet ring 19 is adapted to a pump casing inlet ring 24 located in the inner lining of the pump casing 1. A pump shaft 6 is installed inside the impeller 4, and a pump casing shaft support member 22 is installed at the pump inlet. A friction pair for balancing axial forces is installed between the pump casing shaft support 22 and the inlet of the impeller 4. The friction pair includes a rotating ring 3 installed at the inlet of the impeller 4. An anti-rotation block 18 for rotating ring 3 is provided on the side of the impeller 4 near the rotating ring 3. The anti-rotation block 18 is pressed together with the impeller 4. A stationary ring 2 is installed on the side of the rotating ring 3 near the pump casing shaft support 22. An inner magnetic rotor 11 is installed inside the impeller 4, and the impeller 4 and the inner magnetic rotor 11 are pressed together. The pump casing shaft support 22 is provided with a liquid inlet 26, and the inner side of the pump casing shaft support 22 is adapted to one end of the pump shaft 6 (the end of the pump shaft 6 near the pump casing shaft support 22 is provided with a shaft anti-rotation platform 16, and the pump casing shaft support 22 is provided with an anti-rotation hole 27 adapted to the shaft anti-rotation platform 16 to prevent relative rotation of the pump shaft 6).

[0034] An isolation sleeve assembly is installed on the side of the pump casing 1 away from the pump inlet. A bracket 10 is installed on one side of the isolation sleeve assembly, and the bracket 10 is bolted to the pump casing 1. The isolation sleeve assembly is located outside the impeller 4. The isolation sleeve assembly includes an inner isolation sleeve 7, which is clamped by the pump casing 1 and the bracket 10. An isolation sleeve reinforcing sleeve 8 is installed on the outside of the inner isolation sleeve 7, which is clamped by the inner isolation sleeve 7 and the bracket 10. A pump casing sealing gasket 9 is installed between the inner isolation sleeve 7 and the pump casing 1. A bearing 5 is installed between the impeller 4 and the pump shaft 6. An isolation sleeve friction ring 12 is provided on the side of the bearing 5 near the inner isolation sleeve 7, and the isolation sleeve friction ring 12 is mounted on the pump shaft 6. A limiting surface 17 is provided on the side of the bearing 5 near the isolation sleeve friction ring 12 to prevent relative rotation between the bearing 5 and the impeller 4. An isolation sleeve positioning platform 20 is provided on the side of the inner isolation sleeve 7 away from the pump inlet. A reinforcing sleeve positioning hole 21 that matches the isolation sleeve positioning platform 20 is provided on the reinforcing sleeve 8.

[0035] The motor 14 is bolted to the side of the bracket 10 away from the pump casing 1. The bottom of the bracket 10 is provided with bracket feet 25, which are detachably connected to the base plate 15 by bolts. The bracket 10 is provided with an outer magnetic rotor 13 that is compatible with the inner magnetic rotor 11, and the outer magnetic rotor 13 is mounted on the power shaft of the motor 14. All flow passages inside the pump casing 1 are lined with corrosion-resistant linings. The pump casing shaft support 22 is an integral structure with the corrosion-resistant lining, and the pump casing shaft support 22 is provided with a metal support embedded part 23.

[0036] During operation, the motor 14 rotates, driving the outer magnetic rotor 13 to rotate. The outer magnetic rotor 13 and the inner magnetic rotor 11 form a push-pull magnetic circuit, driving the impeller 4 to rotate. When the impeller 4 rotates, the medium flows from the pump inlet through the impeller 4 and is output from the pump outlet, completing the medium transportation.

[0037] The isolation sleeve of this utility model is designed with a double-layer structure. The inner isolation sleeve 7 is made of F46 material, which is resistant to strong corrosive media. The outer isolation sleeve 8 is made of PEEK material. PEEK has a long-term operating temperature of about 200℃. At this temperature, it can still maintain high tensile strength (527MPa, while 45 steel is 600MPa), and can withstand high pressure to realize long-distance medium transportation.

[0038] The anti-rotation block 18 at the inlet of the impeller 4 of this utility model can prevent the relative rotation of the moving ring 3. The impeller inlet ring 19 extends into the pump casing inlet ring 24 to form a fit, which reduces the leakage of the conveyed medium and improves the pump efficiency.

[0039] The positioning platform 20 of this utility model extends into the positioning hole 21 of the isolation sleeve reinforcement sleeve, which increases the support strength of the inner sleeve 7 of the isolation sleeve and at the same time plays the role of positioning the isolation sleeve reinforcement sleeve 8.

[0040] The bracket 10 of this invention has a bracket foot 25 on one side, which, together with the base of the motor 14, supports the magnetic pump, reducing the overall size and weight of the pump, making it easier to transport and install. Furthermore, this invention includes a supporting metal embedded part 23 within the pump casing shaft support 22, improving the strength and stability of the support.

Claims

1. A compact, corrosion-resistant magnetic pump, comprising a pump casing (1), a pump inlet on one side of the pump casing (1), a pump outlet on the pump casing (1), an impeller (4) inside the pump casing (1), and a pump shaft (6) inside the impeller (4), characterized in that: The pump inlet is equipped with a pump casing shaft support (22), and a friction pair for balancing axial force is installed between the pump casing shaft support (22) and the inlet of the impeller (4). An inner magnetic rotor (11) is installed inside the impeller (4), and the inner side of the pump casing shaft support (22) is adapted to one end of the pump shaft (6). An isolation sleeve assembly is installed on the side of the pump casing (1) away from the pump inlet, and a bracket (10) is installed on one side of the isolation sleeve assembly. An outer magnetic rotor (13) adapted to the inner magnetic rotor (11) is provided inside the bracket (10), and the outer magnetic rotor (13) is installed on the power shaft of the motor (14). All flow passages inside the pump casing (1) are lined with corrosion-resistant linings.

2. The compact, corrosion-resistant magnetic pump according to claim 1, characterized in that: The friction pair includes a moving ring (3) installed at the inlet of the impeller (4), and a stationary ring (2) is installed on the side of the moving ring (3) near the pump casing shaft support (22).

3. The compact, corrosion-resistant magnetic pump according to claim 2, characterized in that: The isolation sleeve assembly is located outside the impeller (4), and the isolation sleeve assembly includes an inner isolation sleeve (7), and an outer isolation sleeve reinforcing sleeve (8) is installed on the outer side of the inner isolation sleeve (7).

4. The compact, corrosion-resistant magnetic pump according to claim 3, characterized in that: A bearing (5) is installed between the impeller (4) and the pump shaft (6). A friction ring (12) is provided on the side of the bearing (5) near the inner sleeve (7) of the isolation sleeve. The friction ring (12) is installed on the pump shaft (6).

5. A compact, corrosion-resistant magnetic pump according to claim 1, characterized in that: The pump shaft (6) is provided with a shaft anti-rotation platform (16) at one end near the pump housing shaft support (22), and the pump housing shaft support (22) is provided with an anti-rotation hole (27) that is compatible with the shaft anti-rotation platform (16).

6. The compact, corrosion-resistant magnetic pump according to claim 1, characterized in that: The impeller (4) and the inner magnetic rotor (11) are pressed together as one unit.

7. A compact, corrosion-resistant magnetic pump according to claim 1, characterized in that: The impeller (4) is provided with an impeller inlet ring (19) on the side near the pump inlet. The impeller inlet ring (19) is adapted to the pump casing inlet ring (24) provided in the inner lining of the pump casing (1). The impeller (4) is provided with a rotating ring anti-rotation block (18) that cooperates with the rotating ring (3) on the side near the rotating ring (3).

8. A compact, corrosion-resistant magnetic pump according to claim 4, characterized in that: The inner sleeve (7) of the isolation sleeve is provided with an isolation sleeve positioning platform (20) on the side away from the pump inlet, and the reinforcing sleeve (8) of the isolation sleeve is provided with a reinforcing sleeve positioning hole (21) that is compatible with the isolation sleeve positioning platform (20).

9. A compact, corrosion-resistant magnetic pump according to claim 8, characterized in that: The bearing (5) has a limiting surface (17) on the side near the isolation sleeve friction ring (12) to prevent relative rotation between the bearing (5) and the impeller (4).

10. A compact, corrosion-resistant magnetic pump according to claim 1, characterized in that: The pump casing shaft support (22) is an integral structure with the corrosion-resistant lining, and the pump casing shaft support (22) is provided with a metal support embedded part (23).

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