Magnetic drive pump capable of conveying medium containing particles

Abstract

The invention relates to the technical field of magnetic pumps, in particular to a magnetic pump capable of conveying a particle-containing medium, which comprises a pump body, an impeller, a magnetic power mechanism and a medium separation mechanism, the medium separation mechanism is provided with a first medium inlet, a second medium inlet, a first medium outlet and a second medium outlet, the medium separation mechanism is used for separating a first particle-containing medium at the first medium inlet into a second particle-containing medium and a particle-free medium, and the magnetic power mechanism is provided with a medium channel communicating with the second medium outlet and the pump cavity; the particle-containing medium is separated to form a particle-free medium, then the particle-free medium enters the magnetic power mechanism, the medium flowing effect of the magnetic power mechanism towards the direction of the pump cavity is achieved, particles in the medium in the pump cavity are prevented from entering the magnetic power mechanism, and meanwhile the particle-free medium is separated according to the characteristics of the particle-free medium. And the magnetic power mechanism can be additionally cooled, lubricated and the like.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic pumps, in particular to a magnetic pump capable of conveying a medium containing particles. Background Art

[0002] A magnetic pump is a medium conveying device that transmits torque contactlessly through the suction of a permanent magnet. A magnetic pump is mainly composed of a pump body, an impeller, and a magnetic power mechanism. Generally speaking, the magnetic power mechanism includes inner and outer magnetic rotors, a spacer sleeve, an inner shaft of the pump, a shaft sleeve assembly, and an electric motor. The electric motor drives the outer magnetic rotor, which drives the inner magnetic rotor in the spacer sleeve to rotate through the magnetic field, thereby driving the impeller to rotate.

[0003] At present, the magnetic pumps on the market have high requirements for the conveying medium and cannot be used to convey the medium containing particles. This is because the medium containing particles directly enters the magnetic pump and the power mechanism, affecting the stability of the magnetic pump operation and greatly reducing the life of the magnetic pump. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and to provide a magnetic pump capable of conveying a medium containing particles.

[0005] The technical solution of the present invention is: a magnetic pump capable of conveying a particle-containing medium, comprising a pump body, an impeller, and a magnetic power mechanism, wherein the pump body is provided with a pump inlet, a pump outlet, and a pump cavity connecting the pump inlet and the pump outlet, the impeller is arranged in the pump cavity, the magnetic power mechanism is connected to the impeller to provide a driving force, and further comprises a medium separation mechanism, wherein the medium separation mechanism has a first medium inlet connected to the pump outlet, a second medium inlet, a first medium outlet connected to the pump inlet, and a second medium outlet connected to the magnetic power mechanism, the medium separation mechanism is used to separate a first particle-containing medium at the first medium inlet into a second particle-containing medium outputted through the first medium outlet and a particle-free medium outputted through the second medium outlet, and the magnetic power mechanism is provided with a medium channel connecting the second medium outlet and the pump cavity.

[0006] Furthermore, the magnetic power mechanism also includes an inner magnetic rotor, an outer magnetic rotor, an isolation sleeve, an inner shaft of the pump, a shaft sleeve assembly, a pump cover, an electric motor, and a connecting frame. The pump body, pump cover and connecting frame are fixedly connected in sequence, and a pump cavity is formed between the pump body and the pump cover. The isolation sleeve is arranged in the connecting frame and is fixedly connected to the pump cover. The inner magnetic rotor is rotatably arranged in the isolation sleeve and forms a circumferential linkage with the impeller through the inner shaft of the pump. The outer magnetic rotor is sleeved outside the isolation sleeve and is rotatable when driven by the electric motor. The pump cover is provided with a pump cover flushing channel connecting the inner cavity of the isolation sleeve with the outlet of the second medium.

[0007] Furthermore, the impeller is provided with a pumping chamber, an inlet arranged at the center and connected to the pumping chamber, and an outlet arranged at the periphery and connected to the pumping chamber, the inlet is connected to the pump inlet, the inner shaft of the pump is hollow to form a center hole, and the two ends of the center hole of the inner shaft of the pump are respectively connected to the pumping chamber and the inner cavity of the isolation sleeve.

[0008] Furthermore, a first hole connecting the pumping cavity and the cavity between the back plate and the pump cover is provided on the back plate of the impeller close to the pump cover.

[0009] Furthermore, an impeller, a shaft sleeve assembly, and an inner magnetic rotor are sequentially arranged on the inner shaft of the pump, and both ends are fastened by nuts, and the outer periphery of the inner magnetic rotor is gap-matched with the inner wall of the isolation sleeve.

[0010] Furthermore, a thrust ring is connected between the impeller and the sleeve assembly.

[0011] Furthermore, the medium separation mechanism further comprises a primary separator, a secondary separator and a pipeline, the primary separator has a third medium outlet connected to the pump inlet, the secondary separator has a fourth medium outlet connected to the pump inlet, and the third medium outlet and the fourth medium outlet constitute a first medium outlet; The primary separator has a fifth medium outlet connected to the secondary separator, the secondary separator has a sixth medium outlet connected to the magnetic power mechanism, the fifth medium outlet and the sixth medium outlet constitute a second medium outlet, the third medium outlet and the fourth medium outlet, the first medium outlet and the pump inlet, the fifth medium outlet and the second medium inlet provided with the secondary separator, and the sixth medium outlet and the pump cover flushing channel inlet are connected through pipelines.

[0012] Furthermore, the pump body is provided with a cleaning port, and the cleaning port is detachably provided with a plug.

[0013] Furthermore, the first-stage separator and the second-stage separator are provided with fixing brackets.

[0014] Furthermore, the outer magnetic rotor is provided with a second hole connecting the inner cavity of the outer magnetic rotor and the inner cavity of the connecting frame.

[0015] Compared with the prior art, the magnetic pump for conveying particle-containing media provided by the present invention has the following technical effects: The present invention sets a medium separation mechanism between the pump outlet and the pump inlet of the magnetic pump, so that the first particle-containing medium at the pump outlet enters the first medium inlet, and forms a particle-free medium through separation, and then the particle-free medium enters the magnetic power mechanism, forming a medium flow effect of the magnetic power mechanism toward the pump cavity, thereby preventing particles in the medium in the pump cavity from entering the magnetic power mechanism. At the same time, according to the characteristics of the particle-free medium itself, the magnetic power mechanism can be additionally cooled. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0017] Figure 1 This is the overall structure diagram of the magnetic pump; Figure 2 It is the flow route diagram of particle-free medium in magnetic pump; Figure 3 for Figure 1 The enlarged schematic diagram of part A in the middle; Figure 4 for Figure 1 Enlarged schematic diagram of part B in the middle.

[0018] In the figure, pump body 1, impeller 2, pump inlet 3, pump outlet 4, pump chamber 5, first medium inlet 6, inner magnetic rotor 7, outer magnetic rotor 8, isolation sleeve 9, pump inner shaft 10, sleeve assembly 11, pump cover 12, motor 13, connecting frame 14, first chamber 15, second chamber 16, third chamber 17, fourth chamber 18, thrust ring 19, primary separator 20, secondary separator 21, third medium outlet 22, fourth medium outlet 23, fifth medium outlet 24, sixth medium outlet 25, plug 26, cleaning port 27, fixing bracket 28, pipeline 29, second hole 30, pump cover flushing channel 31, first hole 32, second medium inlet 33. DETAILED DESCRIPTION

[0019] The embodiment of the present invention discloses a magnetic pump which can be used for conveying a medium containing particles. The magnetic pump is protected from wear by adopting a two-stage suspension separation and reverse cooling method.

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 4 , Figure 1 The overall structural diagram of a magnetic pump for conveying a particle-containing medium provided by an embodiment of the present invention is as follows. Figure 2 This is the flow path diagram of the particle-free medium in the magnetic pump. Figure 3 for Figure 1 The enlarged schematic diagram of part A in the middle; Figure 4 for Figure 1 Enlarged schematic diagram of part B in the middle.

[0022] In a specific embodiment, the magnetic pump capable of conveying a medium containing particles provided by the present invention comprises a pump body 1, an impeller 2, a magnetic power mechanism, and a medium separation mechanism; the pump body 1 is provided with a pump inlet 3, a pump outlet 4, and a pump chamber 5 connecting the pump inlet 3 and the pump outlet 4; the impeller 2 is arranged in the pump chamber 5, and a first hole 32 connecting the pumping chamber and the chamber between the back plate and the pump cover 12 is provided on the back plate of the impeller 2 near the pump cover 12.

[0023] The magnetic power mechanism is connected to the impeller 2 to provide driving force. The magnetic power mechanism includes an inner magnetic rotor 7, an outer magnetic rotor 8, an isolation sleeve 9, an inner pump shaft 10, a sleeve assembly 11, a pump cover 12, an electric motor 13, and a connecting frame 14. The pump body 1, the pump cover 12 and the connecting frame 14 are fixedly connected in sequence. The pump cover 12 is provided with a pump cover flushing channel 31 connecting the inner cavity of the isolation sleeve 9 and the second medium outlet.

[0024] The connecting frame 14 is fixedly connected to the motor 13, and a pump chamber 5 connecting the pump inlet 3 and the pump outlet 4 is formed between the pump body 1 and the pump cover 12. The isolation sleeve 9 is arranged in the connecting frame 14 by bolts and is fixedly connected to the pump cover 12. The inner magnetic rotor 7 is rotatably arranged in the isolation sleeve 9 and forms a circumferential linkage with the impeller 2 through the pump inner shaft 10. The outer magnetic rotor 8 is sleeved outside the isolation sleeve 9 and can rotate when driven by the motor 13; the shaft sleeve assembly 11 is sleeved on the pump inner shaft 10, located between the impeller 2 and the inner magnetic rotor 7, fixedly connected by a nut, and supports the rotation of the pump inner shaft 10 by cooperating with the pump body 1 and the connecting frame 14 to reduce friction.

[0025] The impeller 2 is provided with a pumping cavity, an inlet connected to the pumping cavity and arranged at the center, and an outlet connected to the pumping cavity and arranged at the periphery, the inlet is connected to the pump inlet 3, the pump inner shaft 10 is hollow to form a center hole, and the two ends of the center hole of the pump inner shaft 10 are respectively connected to the pumping cavity and the inner cavity of the isolation sleeve 9. The impeller 2, the sleeve assembly 11, and the inner magnetic rotor 7 are sequentially arranged on the pump inner shaft 10, and the two ends are fastened by nuts, and the first chamber 15 and the second chamber 16 are formed on both sides of the inner magnetic rotor, and the outer periphery of the inner magnetic rotor 7 is gap-matched with the inner wall of the isolation sleeve 9.

[0026] The medium separation mechanism includes a primary separator 20, a secondary separator 21, a first medium inlet 6 connected to a pump outlet 4, a first medium outlet connected to a pump inlet 3, and a second medium outlet connected to a magnetic power mechanism; the primary separator 20 has a third medium outlet 22 connected to the pump inlet 3, the secondary separator 21 has a fourth medium outlet 23 connected to the pump inlet 3, and the third medium outlet 22 and the fourth medium outlet 23 constitute a first medium outlet; the primary separator 20 has a fifth medium outlet 24 connected to a second medium inlet 33 of the secondary separator 21, the secondary separator 21 has a sixth medium outlet 25 connected to the magnetic power mechanism, and the fifth medium outlet 24 and the sixth medium outlet 25 constitute a second medium outlet; the third medium outlet 22 and the fourth medium outlet 23, the first medium outlet and the pump inlet 3, the fifth medium outlet 24 and the second medium inlet 33 provided in the secondary separator 21, and the sixth medium outlet 25 and the inlet of the pump cover flushing channel 31 are connected through a pipeline 29.

[0027] The medium separation mechanism is used to separate the first particle-containing medium of the first medium inlet 6 into the second particle-containing medium transported through the first medium outlet and the particle-free medium transported through the second medium outlet. The magnetic power mechanism is provided with a medium channel connecting the second medium outlet and the pump chamber 5. The medium channel includes a pump cover flushing channel 31 to the first chamber 15 inside the isolation sleeve 9, that is, the first chamber 15 formed by the inner magnetic rotor and the pump cover, a second chamber 16 inside the isolation sleeve 9 to the center hole of the pump inner shaft 10, a third chamber 17 through the hollow center hole of the pump inner shaft 10 to the back of the impeller 2, and a fourth chamber 18 between the first hole 32 close to the pump cover 12 provided on the back plate of the impeller 2 and the pump cover 12.

[0028] The particle-containing medium action process is as follows: the first particle-containing medium enters the primary separator 20 through the first medium inlet 6 connected to the pump outlet 4, and after being filtered in the primary separator 20, the second particle-containing medium returns to the pump inlet through the third medium outlet 22 and the pipeline 29, and the particle-free medium enters the secondary separator 21 through the fifth medium outlet 24, the pipeline 29, and the second medium inlet 33 to continue filtering. Similarly, the first particle-containing medium filtered by the secondary separator 21 enters the pump inlet 3 through the fourth medium outlet 23 and the pipeline 29, and the particle-free medium enters the magnetic power mechanism through the sixth medium outlet 25, the pipeline 29, and the pump cover flushing channel 31.

[0029] The specific flow process of particle-free medium is as follows Figure 2As shown, the magnetic steel of the inner and outer magnetic rotors is cooled after entering the first chamber 15 of the medium channel through the pump cover flushing channel 31, and then entering the second chamber 16 formed by the isolation sleeve 9 and the inner magnetic rotor 7 separately. After cooling, it enters the third chamber 17 through the center hole of the pump inner shaft 10 again to lubricate the sleeve assembly, and then returns to the medium side of the pump from the fourth chamber 18, that is, through the chamber formed by the back of the impeller 2 and the pump cover, so that the magnetic pump will not be worn when conveying the medium containing particles, thereby increasing its service life.

[0030] Finally, under the action of the magnetic pump, a part of the medium containing particles is output from the magnetic pump through the pump outlet 4, and the other part enters the medium separation mechanism through the first medium inlet 6 connected to the pump outlet 4, and the above operation is repeated.

[0031] Furthermore, a thrust ring 19 can be installed between the sleeve assembly 11 and the impeller 2, that is, the impeller 2, the thrust ring 19, the sleeve assembly 11, and the inner magnetic rotor 7 are sequentially arranged on the pump inner shaft 10. The thrust ring 19 is used to bear the axial thrust and cooperate with the pump cover 12 and the sleeve assembly 11 to prevent the impeller 2 from axial movement.

[0032] Furthermore, a cleaning port 27 may be provided on the pump body 1, and a plug 26 may be detachably provided, which is used to discharge the residual medium in the pump when the magnetic pump is shut down for maintenance, so as to facilitate cleaning.

[0033] Furthermore, a fixing bracket 28 is provided on the primary separator 20 and the secondary separator 21, and the third medium outlet 22 of the primary separator 20 and the fourth medium outlet of the secondary separator 21 can be enlarged to avoid particles from accumulating at the bottom of the separator.

[0034] Furthermore, the outer magnetic rotor 8 is symmetrically provided with a second hole 30 connecting the interior of the outer magnetic rotor 8 with the interior of the connecting frame 14. The second hole 30 can eliminate rotational vibration, correct the mass distribution of the outer magnetic rotor, avoid vibration and bearing wear caused by imbalance during high-speed rotation, enhance air convection, form an air flow channel through the second hole 30, and dissipate heat by convection.

[0035] Although the present disclosure has been shown and described with reference to specific exemplary embodiments of the present disclosure, it should be understood by those skilled in the art that various changes in form and details may be made to the present disclosure without departing from the spirit and scope of the present disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-mentioned embodiments, but should be determined not only by the appended claims, but also by the equivalents of the appended claims.

Claims

1. A magnetic pump capable of conveying a medium containing particles, comprising a pump body (1), an impeller (2), and a magnetic power mechanism, wherein the pump body (1) is provided with a pump inlet (3), a pump outlet (4), and a pump chamber (5) communicating with the pump inlet (3) and the pump outlet (4), the impeller (2) being arranged in the pump chamber (5), and the magnetic power mechanism being connected to the impeller (2) to provide a driving force, characterized in that: The device also includes a medium separation mechanism, the medium separation mechanism having a first medium inlet (6) connected to the pump outlet (4), a first medium outlet connected to the pump inlet (3), and a second medium outlet connected to the magnetic power mechanism, the medium separation mechanism being used to separate a first particle-containing medium at the first medium inlet (6) into a second particle-containing medium output through the first medium outlet and a particle-free medium output through the second medium outlet, and the magnetic power mechanism being provided with a medium channel connecting the second medium outlet and the pump chamber (5).

2. The magnetic pump according to claim 1, characterized in that: The magnetic power mechanism further comprises an inner magnetic rotor (7), an outer magnetic rotor (8), an isolating sleeve (9), a pump inner shaft (10), a shaft sleeve assembly (11), a pump cover (12), a motor (13), and a connecting frame (14); the pump body (1), the pump cover (12), and the connecting frame (14) are fixedly connected in sequence; a pump cavity (5) is formed between the pump body (1) and the pump cover (12); the isolating sleeve (9) is arranged in the connecting frame (14) and is fixedly connected to the pump cover (12); the inner magnetic rotor (7) is rotatably arranged in the isolating sleeve (9) and forms a circumferential linkage with the impeller (2) through the pump inner shaft (10); the outer magnetic rotor (8) is sleeved outside the isolating sleeve (9) and is rotatable when driven by the motor (13); and a pump cover flushing channel (31) is provided on the pump cover, which is connected to the inner cavity of the isolating sleeve (9) and the outlet of the second medium.

3. The magnetic pump according to claim 2, characterized in that: The impeller (2) is provided with a pumping chamber, an inlet connected to the pumping chamber and arranged at the center, and an outlet connected to the pumping chamber and arranged at the periphery, the inlet being connected to the pump inlet (3), the pump inner shaft (10) being hollow to form a center hole, and the two ends of the center hole of the pump inner shaft (10) being connected to the pumping chamber and the inner cavity of the isolation sleeve (9) respectively.

4. The magnetic pump according to claim 3, characterized in that: A first hole (32) is provided on the back plate of the impeller (2) close to the pump cover (12), which is connected to the pumping chamber and the chamber between the back plate and the pump cover (12).

5. The magnetic pump according to claim 3, characterized in that: An impeller (2), a shaft sleeve assembly (11), and an inner magnetic rotor (7) are sequentially arranged on the inner shaft (10) of the pump, and both ends are fastened by nuts, and the outer periphery of the inner magnetic rotor (7) is gap-matched with the inner wall of the isolation sleeve (9).

6. The magnetic pump according to claim 5 or claim 4, characterized in that: A thrust ring (19) is connected between the impeller (2) and the shaft sleeve assembly (11).

7. The magnetic pump according to any one of claims 1 to 5, characterized in that: The medium separation mechanism further comprises a primary separator (20), a secondary separator (21) and a pipeline (29); the primary separator (20) has a third medium outlet (22) connected to the pump inlet (3); the secondary separator (21) has a fourth medium outlet (23) connected to the pump inlet (3); the third medium outlet (22) and the fourth medium outlet (23) constitute a first medium outlet; The primary separator (20) has a fifth medium outlet (24) connected to the secondary separator (21); the secondary separator (21) has a sixth medium outlet (25) connected to the magnetic power mechanism; the fifth medium outlet (24) and the sixth medium outlet (25) form a second medium outlet; the third medium outlet (22) and the fourth medium outlet (23), the first medium outlet and the pump inlet (3), the fifth medium outlet (24) and the second medium inlet (33) provided in the secondary separator (21), and the sixth medium outlet (25) and the inlet of the pump cover flushing channel (31) are connected via a pipeline (29).

8. The magnetic pump according to claim 7, characterized in that: The pump body (1) is provided with a cleaning port (27), and the cleaning port (27) is detachably provided with a plug (26).

9. The magnetic pump according to claim 8, characterized in that: A fixing bracket (28) is provided on the primary separator (20) and the secondary separator (21).

10. The magnetic pump according to claim 9, characterized in that: The outer magnetic rotor (8) is provided with a second hole (30) which connects the interior of the outer magnetic rotor (8) with the interior of the connecting frame (14).

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