Magnetic drive pump for conveying medium containing particles or floccules

Abstract

The utility model relates to a magnetic drive pump for conveying media containing particles or floccules. The magnetic drive pump comprises a magnetic cylinder assembly, a pump body and a motor. The pump body and the motor are arranged at the two ends of the magnetic cylinder assembly respectively. An impeller is arranged in the pump body; the side, close to a pump inlet, of the impeller is not provided with a cover plate. A wear-resisting plate is arranged at the end, close to the magnetic cylinder assembly, in the pump body. A filter screen is arranged on the side, away from the magnetic cylinder assembly, of the wear-resisting plate. According to the utility model, the problem that the sliding bearing and an internal circulation path are easy to block due to particles or floccules contained in a medium is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic pumps, in particular to a magnetic pump for conveying a medium containing particles or floccules. Background Art

[0002] The magnetic pump is a centrifugal pump that uses the outer magnetic rotor to drive the inner magnetic rotor and the pump shaft to rotate, and drives the impeller at the end of the pump shaft to rotate. The internal and external magnetic non-contact torque transmission method realizes the replacement of dynamic seals with static seals to achieve the purpose of leak-free pump transportation technology. At present, magnetic pumps are widely used in the fields of petroleum, chemical industry, medicine, nuclear power, refrigeration, etc. When the magnetic pump transports liquid, the liquid being transported may contain solid particle impurities or floccules. If impurities accumulate, it is easy to cause internal blockage of the magnetic pump, or some of the transported media are easy to aggregate and easily block the pump circulation pipeline, making the internal circulation path of the magnetic pump unsmooth. Ordinary magnetic pumps use conventional closed impellers and conventional internal circulation, which cannot meet the transportation requirements. Utility Model Content

[0003] The utility model mainly solves the technical problems of the prior art such as easy blockage when conveying medium containing particles or flocs, proposes a magnetic pump for conveying medium containing particles or flocs, and solves the effect of the medium containing particles or flocs on the easy blockage of sliding bearings and internal circulation paths.

[0004] The utility model provides a magnetic pump for conveying a medium containing particles or flocs, comprising: a magnetic cylinder assembly, a pump body and a motor; the pump body and the motor are respectively arranged at two ends of the magnetic cylinder assembly; an impeller is arranged in the pump body; the side of the impeller close to the pump inlet has no cover plate; a wear-resistant plate is arranged inside the pump body close to the end of the magnetic cylinder assembly; a filter screen is arranged on the side of the wear-resistant plate away from the magnetic cylinder assembly.

[0005] Furthermore, there are no cover plates on both sides of the impeller.

[0006] Furthermore, the impeller is arranged on the pump shaft through a sliding bearing.

[0007] Furthermore, an inner circulation hole is arranged on the wear-resistant plate.

[0008] Furthermore, a pump inlet is provided at one end of the pump body away from the magnetic cylinder; and a pump outlet is provided at the upper end of the pump body.

[0009] Furthermore, the magnetic cylinder assembly comprises: an inner magnetic cylinder body and an outer magnetic cylinder body; an isolation sleeve is arranged between the inner magnetic cylinder body and the outer magnetic cylinder body.

[0010] Furthermore, the filter screen is made of stainless steel.

[0011] Furthermore, the inner diameter of the mesh of the filter screen is in the range of 0.4-1.0 mm.

[0012] Compared with the prior art, the utility model provides a magnetic pump for conveying medium containing particles or floccules. The utility model uses an open impeller with blades but no front and rear covers, which is convenient for conveying medium containing particles or floccules; the use of the filter screen solves the influence of the medium containing particles or floccules on the easy blockage of the sliding bearing and the internal circulation passage, and also prevents the particle medium from scratching the rotor shielding sleeve, the isolation sleeve and the sliding bearing. The utility model has a reasonable design and a simple structure, which can not only ensure no leakage, but also adapt to the conveying of special medium containing particles and has reliable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure numerals: 1. impeller, 2. filter screen, 3. internal circulation hole, 4. pump shaft, 5. sliding bearing, 6. inner magnetic cylinder, 7. isolation sleeve, 8. pump outlet, 9. impeller inlet, 10. pump inlet. DETAILED DESCRIPTION

[0015] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the sake of ease of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of the contents.

[0016] like Figure 1 As shown, a magnetic pump for conveying a medium containing particles or flocs provided by an embodiment of the utility model comprises: a magnetic cylinder assembly, a pump body and a motor; the pump body and the motor are respectively arranged at both ends of the magnetic cylinder assembly; an impeller 1 is arranged in the pump body; the impeller 1 is arranged on the pump shaft 4 through a sliding bearing 5; there are no cover plates on both sides of the impeller 1; the impeller 1 adopts an open impeller; that is, there are no cover plates on both sides of the impeller 1, and the impeller 1 has only blades, and no front and rear cover plates, so that impurities such as particles and flocs in the medium can be smoothly discharged from the pump outlet 8. A wear-resistant plate is arranged near the end of the magnetic cylinder assembly inside the pump body; an internal circulation hole 3 is arranged on the wear-resistant plate; a filter screen 2 is arranged on the side of the wear-resistant plate away from the magnetic cylinder assembly, and the filter screen 2 is arranged near the outlet of the impeller 1, and the filter screen 2 is made of stainless steel, and the inner diameter of the mesh of the filter screen is 0.5mm; the inner diameter of the mesh of the filter screen 2 is smaller than the diameter of the particles to prevent impurities from entering the internal circulation path. The setting of the built-in filter screen 2 of the pump allows part of the internal circulating liquid to pass smoothly through the internal circulation hole 3 after being filtered by the filter screen 2, and then flow into the magnetic cylinder assembly through the gap between the wear-resistant plate and the magnetic cylinder assembly, and finally pass through the inner hole of the pump shaft 4 and the lubricated sliding bearing 5. The filtered clean circulating medium prevents the granular medium from scratching the rotor shield sleeve, isolation sleeve 7 and sliding bearing 5.

[0017] One end of the pump body away from the magnetic cylinder is provided with a pump inlet 10; a pump outlet 8 is arranged at the upper end of the pump body. The magnetic cylinder assembly includes an inner magnetic cylinder body 6 and an outer magnetic cylinder body; a spacer sleeve 7 is arranged between the inner magnetic cylinder body 6 and the outer magnetic cylinder body.

[0018] The working process of the magnetic force pump for transporting media containing particles or flocs of the present utility model: The circulating liquid with particles and flocs flows in from the pump inlet 10, and most of the mainstream liquid containing particles or flocs is smoothly transported to the pump outlet 8 through the impeller 1 without front and rear covers. A part of it passes through the filter screen 2, and the filter screen 2 is located at the impeller outlet for filtering the circulating medium, so that the filtered and clean circulating medium passes through the circulation hole 3, and then a part of the liquid flow passes through the gap between the inner magnetic cylinder body 6 and the spacer sleeve 7 and returns to the impeller inlet 9 through the inner hole of the pump shaft 4; this part of the liquid filtered by the filter screen 2 can take away the heat converted by the magnetic vortex loss. Another part of the liquid flow filtered by the filter screen 2 passes through the gap of the sliding bearing 5 to lubricate the sliding bearing.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: if they modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features, the essence of the corresponding technical solutions does not deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A magnetic pump for transporting a medium containing particles or flocs, characterized in that, include: A magnetic cylinder assembly, a pump body and a motor; the pump body and the motor are respectively arranged at both ends of the magnetic cylinder assembly; an impeller (1) is arranged in the pump body; the impeller (1) has no cover plate on the side close to the pump inlet (10); a wear-resistant plate is arranged inside the pump body close to the end of the magnetic cylinder assembly; a filter screen (2) is arranged on the side of the wear-resistant plate facing away from the magnetic cylinder assembly.

2. The magnetic pump for conveying a medium containing particles or flocs according to claim 1, characterized in that, No cover plates are provided on either side of the impeller (1).

3. The magnetic pump for conveying a medium containing particles or flocs according to claim 1, characterized in that, The impeller (1) is arranged on the pump shaft (4) via a sliding bearing (5).

4. The magnetic pump for conveying a medium containing particles or flocs according to claim 1, characterized in that, An inner circulation hole (3) is arranged on the wear-resistant plate.

5. The magnetic pump for conveying a medium containing particles or flocs according to claim 1, characterized in that, A pump inlet (10) is provided at one end of the pump body away from the magnetic cylinder; a pump outlet (8) is provided at the upper end of the pump body.

6. The magnetic pump for transporting a medium containing particles or flocs according to claim 1, characterized in that, The magnetic cylinder assembly comprises: an inner magnetic cylinder body (6) and an outer magnetic cylinder body; an isolation sleeve (7) is arranged between the inner magnetic cylinder body (6) and the outer magnetic cylinder body.

7. The magnetic pump for conveying a medium containing particles or flocs according to claim 1, characterized in that, The filter screen (2) is made of stainless steel.

8. The magnetic pump for transporting a medium containing particles or flocs according to claim 1, characterized in that, The inner diameter of the mesh of the filter screen is in the range of 0.4-1.0 mm.

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