Disassembly-free easy-to-wash magnetic gear pump

Abstract

The invention discloses a disassembly-free easy-to-wash magnetic gear pump, and belongs to the field of magnetic pumps, the disassembly-free easy-to-wash magnetic gear pump comprises a gear pump head, a magnetic transmission assembly, a connecting sleeve and a driving motor, the gear pump head comprises a top cover, a front cover, a middle ring and a rear cover which are in sealed connection, an isolation sleeve is in sealed connection with the lower end face of the rear cover, and a second gear and a third gear meshed with a first gear are arranged in the middle ring; the two sides of the second gear and the two sides of the third gear are each provided with two pump cavities, a first channel communicated with the first pump cavity and the third pump cavity is arranged between the top cover and the front cover, and a second channel communicated with the second pump cavity and the fourth pump cavity and communicated with an inner cavity of the isolation sleeve is arranged between the rear cover and the isolation sleeve. Liquid entering from the liquid inlet flows through the first pump cavity, the second pump cavity, the third pump cavity, the fourth pump cavity and the inner cavity of the isolation sleeve and then flows out from the liquid outlet. The inner cavity of the isolation sleeve is directly communicated with the medium conveying path, the inner cavity of the pump body and the inner cavity of the isolation sleeve can be washed without disassembling the pump body, the maintenance cost is reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic gear pumps, in particular to a disassembly-free and easy-to-flush magnetic gear pump. Background Art

[0002] The magnetic gear pump uses the principle of magnetic transmission to transfer the power of the motor to the gears inside the pump through the outer magnetic rotor, isolation sleeve and inner magnetic rotor, thereby realizing the transportation of liquids. It can be widely used in the petroleum, chemical, pharmaceutical, food, environmental protection and other industries. For example, in chemical production, it can be used to transport strong acids, strong alkalis, organic solvents, etc.; in the pharmaceutical industry, it can be used to transport liquid medicines, intermediates, etc.; in the food industry, it can be used to transport juices, sauces, etc.

[0003] The magnetic gear pump completely isolates the liquid in the pump from the outside world through an isolation sleeve, adopts magnetic transmission, does not require traditional mechanical seals, and completely eliminates the risk of leakage. However, the internal space of the isolation sleeve is a semi-enclosed space. When working, the pressure in the pump chamber is greater than the pressure inside the isolation sleeve. After the medium enters the isolation sleeve, the medium cannot circulate and is easily accumulated in the internal space of the isolation sleeve. It is easy to scale or breed bacteria for a long time. Therefore, the magnetic gear pump needs to be cleaned regularly. In addition, when it is necessary to switch the conveying medium, the magnetic pump also needs to be cleaned to prevent the raw materials remaining in the pump body from contaminating the new conveying medium.

[0004] In the prior art, the cleaning methods of magnetic gear pumps mainly include online cleaning and regular disassembly and cleaning. Online cleaning involves circulating cleaning liquid through the pump body, but it is difficult to rinse it clean due to the semi-enclosed structure of the isolation sleeve and the internal and external pressure difference. In addition, online cleaning is also difficult to clean some blind holes such as the gear shaft mounting holes. Although disassembly and cleaning can ensure cleanliness, it inevitably increases maintenance costs and time. Frequent disassembly and assembly may also damage the gear pump's parts and sealing system, affecting the long-term stable operation of the equipment. Summary of the invention

[0005] In view of the problems existing in the cleaning of existing magnetic gear pumps, the present invention proposes a disassembly-free and easy-to-flush magnetic gear pump. The design aims to achieve internal flushing of the pump body while transmitting the medium, and the pump can be kept clean without disassembling the pump body, thereby improving the maintenance efficiency and operating stability of the equipment.

[0006] The objective of the present invention is achieved through the following technical solutions: a disassembly-free and easy-to-wash magnetic gear pump, comprising a gear pump head, a magnetic transmission assembly, a connecting sleeve, and a driving motor, wherein the gear pump head is provided with a liquid inlet and a liquid outlet, and the gear pump head is provided with a driving gear and a driven gear meshing with each other, the magnetic transmission assembly comprises an inner magnetic rotor, a spacer sleeve, and an outer magnetic rotor, the inner magnetic rotor is connected to the driving gear in a transmission manner, the outer magnetic rotor is connected to the output shaft of the driving motor, and the connecting sleeve connects the gear pump head and the driving motor; The gear pump head comprises a top cover, a front cover, a middle ring, and a rear cover which are sealed and connected in sequence, and the isolation sleeve is sealed and connected to the lower end surface of the rear cover; A first gear is arranged in the middle ring, and a second gear and a third gear meshing with the first gear are arranged on both sides thereof, and any one of the first gear, the second gear and the third gear is transmission-connected with the inner magnetic rotor, and a first pump cavity and a second pump cavity are arranged on both sides of the second gear in the middle ring, and a third pump cavity and a fourth pump cavity are arranged on both sides of the third gear, and the first pump cavity is on the same side as the fourth pump cavity, and the second pump cavity is on the same side as the third pump cavity; A first through hole communicating with the first pump chamber and a second through hole communicating with the third pump chamber are provided on the front cover, and a first liquid passage cavity communicating with the first through hole and the second through hole is provided on the front cover or the top cover, and the first through hole, the first liquid passage cavity and the second through hole constitute a first passage communicating with the first pump chamber and the third pump chamber; The rear cover is provided with a third through hole communicating with the second pump chamber and the inner cavity of the isolation sleeve, and a fourth through hole communicating with the fourth pump chamber and the inner cavity of the isolation sleeve. The third through hole, the inner cavity of the isolation sleeve and the fourth through hole constitute a second channel communicating with the second pump chamber and the fourth pump chamber. A portion of the liquid entering from the liquid inlet flows through the first pump chamber and the second pump chamber under the action of the first gear and the second gear, and then communicates with the liquid outlet. Another portion of the liquid flows through the first channel, the third pump chamber, and the fourth pump chamber under the action of the first gear and the third gear, and then communicates with the liquid outlet through the second channel.

[0007] Preferably, the liquid inlet is arranged on the side wall of the middle ring and is connected with the first pump chamber.

[0008] Preferably, the liquid inlet is arranged on the top cover and communicated with the first liquid passage chamber.

[0009] Preferably, the liquid outlet is arranged on the side wall of the middle ring and is connected with the second pump chamber.

[0010] Preferably, the inner magnetic rotor is transmission-connected to the first gear.

[0011] Preferably, a second liquid passage cavity communicating with the third through hole and the fourth through hole is provided on the lower end surface of the rear cover corresponding to the inner cavity of the isolation sleeve.

[0012] Preferably, through mounting holes are respectively provided on the front cover and the rear cover, the mounting holes are respectively connected to the first liquid chamber and the inner cavity of the isolation sleeve, and the two ends of the shaft connected to the first gear, the second gear and the third gear are respectively installed in the corresponding mounting holes.

[0013] The beneficial effects of the present invention are: (1) The disassembly-free and easy-to-flush magnetic gear pump of the present invention is provided with three meshing gears and creatively designs four medium conveying paths. The first conveying path is: a part of the conveying medium entering through the liquid inlet enters the first pump chamber under the suction effect generated by the cooperation of the first gear and the second gear, and is conveyed to the second pump chamber through the meshing rotation of the first gear and the second gear; the second conveying path is: a part of the conveying medium entering through the liquid inlet enters the third pump chamber through the first channel under the suction effect generated by the cooperation of the first gear and the third gear, and is conveyed to the fourth pump chamber through the meshing rotation of the first gear and the third gear, and then flows back to the second pump chamber through the second channel; the third conveying path is: a part of the conveying medium in the first pump chamber is conveyed to the fourth pump chamber through the rotation of the first gear and merged with the second conveying path; the fourth conveying path is: a part of the conveying medium entering the third pump chamber is conveyed to the second pump chamber through the rotation of the first gear; the conveying media of the four medium conveying paths are finally gathered and output together from the liquid outlet. Since the second channel is connected to the inner cavity of the isolation sleeve, the inner space of the isolation sleeve forms a channel for the medium to flow, and the medium will not accumulate in the isolation sleeve, so that the pump body can be internally flushed while transmitting the medium, keeping the pump clean; during online cleaning, the cleaning liquid introduced can also effectively flush the inside of the isolation sleeve without disassembling the pump body, which greatly reduces maintenance costs and downtime and improves the operating efficiency of the pump; (2) Due to the provision of three gears, compared with the existing two gears, the delivery capacity of the magnetic gear pump is greatly increased, the flow rate is increased, and the output stability of the pump is improved. In addition, during the double gear meshing process, the power loss is dispersed on the two gears, reducing the load and wear of a single gear; (3) As the medium continuously flows through the isolation sleeve, the continuous flow of the medium plays an effective cooling role and can take away a large amount of heat generated by the magnetic eddy current, thereby preventing the internal temperature of the isolation sleeve from being too high and reducing the risk of performance degradation or failure due to overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0015] Figure 2 It is a partial exploded schematic diagram of the gear pump head of Example 1 of the present invention.

[0016] Figure 3It is a schematic diagram of the top view structure of the middle circle of Example 1 of the present invention.

[0017] Figure 4 It is a schematic diagram of the cross-sectional structure of the gear pump head of Example 1 of the present invention.

[0018] Figure 5 It is a schematic diagram of the structure of the gear pump head of Example 2 of the present invention.

[0019] Figure 6 It is an exploded schematic diagram of the gear pump head of Example 2 of the present invention.

[0020] In the figure: Gear pump head 1; Top cover 101, front cover 102, middle ring 103, rear cover 104, first gear 105, second gear 106, third gear 107; The first liquid passage chamber 1011, the first through hole 1021, the second through hole 1022, the liquid inlet 1031, the first pump chamber 1032, the second pump chamber 1033, the third pump chamber 1034, the fourth pump chamber 1035, the liquid outlet 1036, the third through hole 1041, the fourth through hole 1042, and the second liquid passage chamber 1043; Connecting sleeve 2, driving motor 3, outer magnetic rotor 401, isolating sleeve 402, inner magnetic rotor 403. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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.

[0022] Example 1

[0023] See also Figure 1-Figure 4 The present embodiment provides a non-disassembly and easy-to-wash magnetic gear pump, comprising a gear pump head 1, a magnetic transmission assembly, a connecting sleeve 2, and a drive motor 3. The gear pump head 1 is provided with a driving gear and a passive gear meshing with each other, the magnetic transmission assembly comprises an inner magnetic rotor 403, an isolating sleeve 402, and an outer magnetic rotor 401, the inner magnetic rotor 403 is connected to the driving gear through a transmission shaft, the outer magnetic rotor 401 is connected to the output shaft of the drive motor 3, and the connecting sleeve 2 connects the gear pump head 1 and the drive motor 3.

[0024] In the technical solution provided in this embodiment, the gear pump head 1 includes a top cover 101 , a front cover 102 , a middle ring 103 , and a rear cover 104 which are sealed and connected in sequence, and the isolation sleeve 402 is sealed and connected to the lower end surface of the rear cover 104 .

[0025] A first gear 105 is disposed in the middle ring 103, and a second gear 106 and a third gear 107 are respectively disposed on both sides of the first gear 105 to mesh with the first gear 105. Any one of the first gear 105, the second gear 106, and the third gear 107 is connected to the inner magnetic rotor 403 in a transmission manner. In this embodiment, the first gear 105 is connected to the inner magnetic rotor 403 as a driving gear, and the second gear 106 and the third gear 107 are driven gears. The first gear 105 drives the second gear 106 and the third gear 107 on both sides to rotate. The rotation direction is shown in FIG. Figure 3 In the direction indicated by the arrow.

[0026] The first pump chamber 1032 and the second pump chamber 1033 are respectively provided on both sides of the second gear 106 in the middle ring 103, and the third pump chamber 1034 and the fourth pump chamber 1035 are respectively provided on both sides of the third gear 107, and the first pump chamber 1032 and the fourth pump chamber 1035 are on the same side, and the second pump chamber 1033 and the third pump chamber 1034 are on the same side. The front cover 102 is provided with a first through hole 1021 communicating with the first pump chamber 1032, and a second through hole 1022 communicating with the third pump chamber 1034, and the front cover 102 or the top cover 101 is provided with a first liquid passage chamber 1011 communicating with the first through hole 1021 and the second through hole 1022 (see Figure 4 In this embodiment, the first liquid passage chamber 1011 is arranged on the lower end surface of the top cover 101), the first through hole 1021, the first liquid passage chamber 1011, and the second through hole 1022 constitute a first passage connecting the first pump chamber 1032 and the third pump chamber 1034. The rear cover 104 is provided with a third through hole 1041 connecting the second pump chamber 1033 and the inner cavity of the isolation sleeve 402, and a fourth through hole 1042 connecting the fourth pump chamber 1035 and the inner cavity of the isolation sleeve 402. The third through hole 1041, the inner cavity of the isolation sleeve 402, and the fourth through hole 1042 constitute a second passage connecting the second pump chamber 1033 and the fourth pump chamber 1035.

[0027] In this embodiment, the liquid inlet 1031 is arranged on the side wall of the middle circle 103 and communicates with the first pump chamber 1032. The liquid outlet 1036 is arranged on the side wall of the middle circle 103 and communicates with the second pump chamber 1033. A part of the liquid entering from the liquid inlet 1031 flows through the first pump chamber 1032 and the second pump chamber 1033 under the action of the first gear 105 and the second gear 106, and then flows out from the liquid outlet 1036. Another part of the liquid flows through the first through hole 1021, the first liquid chamber 1011, the second through hole 1022, the third pump chamber 1034, the fourth pump chamber 1035 under the action of the first gear 105 and the third gear 107, and then enters the second pump chamber 1033 through the fourth through hole 1042, the inner cavity of the isolation sleeve 402, and the third through hole 1041, and finally flows out from the liquid outlet 1036. During the conveying process, a portion of the medium in the first pump chamber 1032 is conveyed to the fourth pump chamber 1035 by the rotation of the first gear 105. A portion of the medium entering the third pump chamber 1034 is conveyed to the second pump chamber 1033 by the rotation of the first gear 105.

[0028] By adopting this technical solution, the internal space of the isolation sleeve 402 is directly connected to the medium conveying path, and the medium will not accumulate in the isolation sleeve 402, so that the pump body can be internally flushed while transmitting the medium, keeping the pump clean; during online cleaning, the cleaning fluid introduced can also effectively flush the interior of the isolation sleeve 402 without disassembling the pump body, greatly reducing maintenance costs and downtime, and improving the operating efficiency of the pump. At the same time, due to the provision of a driving gear and two passive gears, compared with the existing two gears, the delivery capacity of the magnetic gear pump is greatly increased, the flow rate is increased, and it helps to improve the output stability of the pump. In addition, during the meshing of the double gears, the power loss is dispersed on the two gears, reducing the load and wear of a single gear.

[0029] As a preferred solution of this embodiment, a second liquid passage cavity 1043 is provided on the lower end surface of the rear cover 104 corresponding to the inner cavity of the isolation sleeve 402, which is connected to the third through hole 1041 and the fourth through hole 1042. In this way, the second liquid passage cavity 1043 provides an additional and more direct fluid passage, so that the liquid flowing in from the fourth through hole 1042 can pass through the inner cavity of the isolation sleeve 402 more smoothly and flow to the third through hole 1041, thereby optimizing the flow path of the liquid and reducing the flow resistance.

[0030] As another preferred solution of this embodiment, in this embodiment, through mounting holes are respectively provided on the front cover 102 and the rear cover 104, and the mounting holes are respectively communicated with the first liquid passage cavity 1011 and the inner cavity of the isolation sleeve 402, and the two ends of the shaft connected to the first gear 105, the second gear 106, and the third gear 107 are respectively installed in the corresponding mounting holes. In this technical solution, the transmission shaft connected to the first gear 105 and the mounting shaft connected to the second gear 106 and the third gear 107 are respectively installed in the through mounting holes, and no blind holes are formed, so that part of the medium can flow smoothly through the mounting holes, avoiding the problems of medium accumulation and difficulty in flushing caused by the blind holes.

[0031] Example 2

[0032] See also Figure 5 , Figure 6 As another feasible embodiment, the difference between this embodiment and embodiment 1 is that the liquid inlet 1031 is arranged on the top cover 101 and is connected with the first liquid passage chamber 1011, and the conveying medium first enters the first liquid passage chamber 1011 through the liquid inlet 1031, and then enters the first pump chamber 1032 and the third pump chamber 1034 through the first through hole 1021 and the second through hole 1022 respectively, thereby forming four medium conveying paths, and finally outputted from the liquid outlet 1036 connected with the second pump chamber 1033.

[0033] It should be noted that the gear rotation direction of the non-disassembly and easy-to-flush magnetic gear pump of the present invention is not limited to Figure 3 The direction shown can also be Figure 3 The gear rotates in the opposite direction to the direction shown, and after the gear rotation direction is reversed, the flow direction of the conveying medium formed thereby is opposite to the direction listed in the above embodiments.

[0034] The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A disassembly-free and easy-to-flush magnetic gear pump, comprising a gear pump head (1), a magnetic transmission component, a connecting sleeve (2), and a drive motor (3), wherein the gear pump head (1) is provided with a liquid inlet (1031) and a liquid outlet (1036), and the gear pump head (1) is provided with a driving gear and a passive gear meshing with each other, the magnetic transmission component comprises an inner magnetic rotor (403), an isolating sleeve (402), and an outer magnetic rotor (401), the inner magnetic rotor (403) is connected to the driving gear in a transmission manner, and the outer magnetic rotor (401) is connected to the output shaft of the drive motor (3), and the connecting sleeve (2) connects the gear pump head (1) and the drive motor (3), characterized in that: The gear pump head (1) comprises a top cover (101), a front cover (102), a middle ring (103), and a rear cover (104) which are sealed and connected in sequence, and the isolation sleeve (402) is sealed and connected to the lower end surface of the rear cover (104); A first gear (105) is arranged in the middle ring (103), and a second gear (106) and a third gear (107) meshing with the first gear (105) are arranged on both sides thereof, and any one of the first gear (105), the second gear (106) and the third gear (107) is transmission-connected to the inner magnetic rotor (403), and a first pump cavity (1032) and a second pump cavity (1033) are arranged on both sides of the second gear (106) in the middle ring (103), and a third pump cavity (1034) and a fourth pump cavity (1035) are arranged on both sides of the third gear (107), and the first pump cavity (1032) and the fourth pump cavity (1035) are on the same side, and the second pump cavity (1033) and the third pump cavity (1034) are on the same side; A first through hole (1021) communicating with the first pump chamber (1032) and a second through hole (1022) communicating with the third pump chamber (1034) are provided on the front cover (102); a first liquid passage chamber (1011) communicating with the first through hole (1021) and the second through hole (1022) is provided on the front cover (102) or the top cover (101); the first through hole (1021), the first liquid passage chamber (1011), and the second through hole (1022) constitute a first channel communicating with the first pump chamber (1032) and the third pump chamber (1034); The rear cover (104) is provided with a third through hole (1041) communicating with the second pump chamber (1033) and the inner cavity of the isolation sleeve (402), and a fourth through hole (1042) communicating with the fourth pump chamber (1035) and the inner cavity of the isolation sleeve (402); the third through hole (1041), the inner cavity of the isolation sleeve (402), and the fourth through hole (1042) constitute a second channel communicating with the second pump chamber (1033) and the fourth pump chamber (1035); A portion of the liquid entering from the liquid inlet (1031) flows through the first pump chamber (1032) and the second pump chamber (1033) under the action of the first gear (105) and the second gear (106), and then communicates with the liquid outlet (1036); another portion of the liquid flows through the first channel, the third pump chamber (1034), and the fourth pump chamber (1035) under the action of the first gear (105) and the third gear (107), and then communicates with the liquid outlet (1036) through the second channel.

2. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: The liquid inlet (1031) is arranged on the side wall of the middle ring (103) and is connected to the first pump chamber (1032).

3. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: The liquid inlet (1031) is arranged on the top cover (101) and is in communication with the first liquid passage chamber (1011).

4. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: The liquid outlet (1036) is arranged on the side wall of the middle ring (103) and is connected to the second pump chamber (1033).

5. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: The inner magnetic rotor (403) is transmission-connected to the first gear (105).

6. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: A second liquid passage cavity (1043) communicating with the third through hole (1041) and the fourth through hole (1042) is provided on the lower end surface of the rear cover (104) corresponding to the inner cavity of the isolation sleeve (402).

7. The non-disassembly and easy-to-flush magnetic gear pump according to claim 1, characterized in that: Through mounting holes are provided on the front cover (102) and the rear cover (104) respectively, and the mounting holes are connected to the first liquid passage cavity (1011) and the inner cavity of the isolation sleeve (402) respectively, and the two ends of the shaft connected to the first gear (105), the second gear (106) and the third gear (107) are respectively installed in the corresponding mounting holes.

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