A disassembly-free and easy-to-flush magnetic gear pump

Abstract

The present invention discloses a magnetic gear pump that is easy to flush and does not require disassembly. It belongs to the field of magnetic pumps and includes a gear pump head, a magnetic transmission component, a connecting sleeve, and a drive motor. The gear pump head includes a top cover, a front cover, a middle ring, and a back cover that are sealed and connected. The isolation sleeve is sealed and connected to the lower end face of the back cover. The middle ring is provided with a second and a third gear that mesh with the first gear. Two pump chambers are provided on both sides of the second and third gears. A first channel connecting the first pump chamber and the third pump chamber is provided between the top cover and the front cover. A second channel connecting the second pump chamber and the fourth pump chamber and communicating with the inner cavity of the isolation sleeve is provided between the back cover and the isolation sleeve. The liquid entering from the liquid inlet flows through the first pump chamber and the second pump chamber and the third pump chamber, the fourth pump chamber, and the inner cavity of the isolation sleeve respectively, and then flows out from the liquid outlet. In the present invention, the inner cavity of the isolation sleeve is directly connected to the medium conveying path, and the inner cavity of the pump body and the inner cavity of the isolation sleeve can be flushed without disassembling the pump body, thereby reducing maintenance costs and improving operating efficiency.

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 liquid transportation. It can be widely used in 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 fruit juices, sauces, etc.

[0003] The magnetic gear pump completely isolates the liquid in the pump from the outside world through an isolation sleeve. It uses magnetic transmission, does not require traditional mechanical seals, and completely eliminates the hidden danger of leakage. However, the internal space of the isolation sleeve is a semi-enclosed space. During operation, the pressure in the pump chamber is greater than the pressure inside the isolation sleeve. Once the medium enters the isolation sleeve, the medium cannot circulate and easily accumulates inside the isolation sleeve. Over time, it is easy to scale or breed bacteria. 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 existing technology, magnetic gear pumps are primarily cleaned online and periodically by disassembling and cleaning. Online cleaning involves circulating cleaning fluid through the pump body, but due to the semi-enclosed structure of the isolation sleeve and the internal and external pressure differential, thorough rinsing is difficult. Online cleaning also struggles to clean blind holes, such as those for gear shaft mounting. While disassembly and cleaning ensures cleanliness, it inevitably increases maintenance costs and time. Frequent disassembly and assembly can also damage the gear pump's components and sealing system, impacting the long-term stability of the equipment. Summary of the Invention

[0005] In response to 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. This 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 operational stability of the equipment.

[0006] The objective of the present invention is achieved through the following technical solution: a disassembly-free and easy-to-flush magnetic gear pump, comprising a gear pump head, a magnetic transmission assembly, a connecting sleeve, and a drive 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 that mesh with each other, the magnetic transmission assembly comprises an inner magnetic rotor, an isolation sleeve, and an outer magnetic rotor, the inner magnetic rotor is connected to the driving gear, the outer magnetic rotor is connected to the output shaft of the drive motor, and the connecting sleeve connects the gear pump head and the drive motor;

[0007] The gear pump head comprises a top cover, a front cover, a middle ring, and a rear cover which are sealed in sequence, and the isolation sleeve is sealed to the lower end surface of the rear cover;

[0008] A first gear is provided in the middle ring, and a second gear and a third gear meshing with the first gear are provided on both sides thereof, and any one of the first gear, the second gear, and the third gear is in transmission connection with the inner magnetic rotor. A first pump cavity and a second pump cavity are provided on both sides of the second gear in the middle ring, and a third pump cavity and a fourth pump cavity are provided on both sides of the third gear, and the first pump cavity and the fourth pump cavity are on the same side, and the second pump cavity and the third pump cavity are on the same side;

[0009] The front cover is provided with a first through hole communicating with the first pump chamber, and a second through hole communicating with the third pump chamber. The front cover or the top cover is provided with a first liquid passage cavity communicating with the first through hole and the second through hole. 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.

[0010] 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 passage communicating with the second pump chamber and the fourth pump chamber;

[0011] 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. The other 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.

[0012] Preferably, the liquid inlet is arranged on the side wall of the middle ring and is connected to the first pump chamber.

[0013] Preferably, the liquid inlet is provided on the top cover and communicates with the first liquid passage chamber.

[0014] Preferably, the liquid outlet is arranged on the side wall of the middle ring and is connected to the second pump cavity.

[0015] Preferably, the inner magnetic rotor is in transmission connection with the first gear.

[0016] 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.

[0017] Preferably, corresponding through mounting holes are provided on the front cover and the rear cover respectively, and the mounting holes are connected to the first liquid chamber and the inner cavity of the isolation sleeve respectively, 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.

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

[0019] (1) The disassembly-free and easy-to-flush magnetic gear pump of the present invention is provided with three meshing gears and creatively designed with 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 action 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 action 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 together and output from the liquid outlet. Because 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 circulate, and the medium will not accumulate in the isolation sleeve. This enables the pump body to 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 without disassembling the pump body, greatly reducing maintenance costs and downtime, and improving the operating efficiency of the pump.

[0020] (2) Due to the provision of three gears, the delivery capacity of the magnetic gear pump is greatly increased compared with the existing two gears, the flow rate is increased, and the output stability of the pump is improved. In addition, during the process of double gear meshing, the power loss is dispersed on the two gears, reducing the load and wear of a single gear;

[0021] (3) As the medium continuously flows through the isolation sleeve, the continuous flow of the medium plays an effective cooling role, which 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

[0022] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present invention.

[0023] Figure 2 It is a partial exploded schematic diagram of the gear pump head of Example 1 of the present invention.

[0024] Figure 3 2 is a schematic diagram of the top view of the middle ring of Example 1 of the present invention.

[0025] Figure 4 It is a schematic cross-sectional structural diagram of the gear pump head of Example 1 of the present invention.

[0026] Figure 5 2 is a schematic structural diagram of a gear pump head according to embodiment 2 of the present invention.

[0027] Figure 6 Schematic diagram of the explosion of the gear pump head of Example 2 of the present invention.

[0028] In the picture:

[0029] Gear pump head 1;

[0030] Top cover 101, front cover 102, middle ring 103, back cover 104, first gear 105, second gear 106, third gear 107;

[0031] First liquid passage chamber 1011, first through hole 1021, second through hole 1022, liquid inlet 1031, first pump chamber 1032, second pump chamber 1033, third pump chamber 1034, fourth pump chamber 1035, liquid outlet 1036, third through hole 1041, fourth through hole 1042, second liquid passage chamber 1043;

[0032] Connecting sleeve 2, driving motor 3, outer magnetic rotor 401, isolation sleeve 402, inner magnetic rotor 403. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1-Figure 4This embodiment provides a disassembly-free, easy-to-flush 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 driven gear that mesh with each other. The magnetic transmission assembly includes an inner magnetic rotor 403, a spacer sleeve 402, and an outer magnetic rotor 401. The inner magnetic rotor 403 is connected to the driving gear via a transmission shaft, and the outer magnetic rotor 401 is connected to the output shaft of the drive motor 3. The connecting sleeve 2 connects the gear pump head 1 and the drive motor 3.

[0036] In the technical solution provided by 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 that are sealed in sequence, and the isolation sleeve 402 is sealed to the lower end surface of the rear cover 104 .

[0037] A first gear 105 is disposed within the center ring 103. A second gear 106 and a third gear 107 are respectively disposed on either side of the first gear 105, meshing therewith. Any one of the first gear 105, the second gear 106, and the third gear 107 is in transmission connection with the inner magnetic rotor 403. In this embodiment, the first gear 105 serves as a driving gear in transmission connection with the inner magnetic rotor 403, while the second gear 106 and the third gear 107 serve as driven gears. The first gear 105 drives the second gear 106 and the third gear 107 on either side to rotate. The direction of rotation is shown in FIG. Figure 3 Direction indicated by the arrow.

[0038] A first pump cavity 1032 and a second pump cavity 1033 are provided on either side of the second gear 106 within the center ring 103. A third pump cavity 1034 and a fourth pump cavity 1035 are provided on either side of the third gear 107. The first pump cavity 1032 and the fourth pump cavity 1035 are on the same side, while 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 cavity 1032 and a second through hole 1022 communicating with the third pump cavity 1034 are provided on the front cover 102. A first liquid passage cavity 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 (see FIG. 1 ). Figure 4 In this embodiment, the first liquid passage chamber 1011 is disposed 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.

[0039] In this embodiment, the liquid inlet 1031 is provided on the sidewall of the center ring 103 and communicates with the first pump chamber 1032. The liquid outlet 1036 is provided on the sidewall of the center ring 103 and communicates with the second pump chamber 1033. A portion of the liquid entering through the liquid inlet 1031 flows through the first and second pump chambers 1032 and 1033 under the action of the first gear 105 and the second gear 106, and then flows out of the liquid outlet 1036. Another portion of the liquid, under the action of the first gear 105 and the third gear 107, flows through the first through-hole 1021, the first liquid passage chamber 1011, the second through-hole 1022, into the third pump chamber 1034, the fourth pump chamber 1035, and then through the fourth through-hole 1042, the inner cavity of the isolation sleeve 402, and the third through-hole 1041 into the second pump chamber 1033, finally flowing out of the liquid outlet 1036. During the delivery process, a portion of the medium in the first pump chamber 1032 is delivered 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 delivered to the second pump chamber 1033 by the rotation of the first gear 105.

[0040] By adopting this technical solution, the internal space of isolation sleeve 402 is directly connected to the medium conveying path, and the medium will not accumulate in isolation sleeve 402. This allows the pump body to be internally flushed while conveying the medium, keeping the pump clean. During online cleaning, the cleaning fluid introduced can also effectively flush the interior of 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, the provision of a driving gear and two driven gears greatly increases the conveying capacity of the magnetic gear pump compared to the existing two gears, increases the flow rate, and helps improve the output stability of the pump. Moreover, during the dual-gear meshing process, power losses are dispersed between the two gears, reducing the load and wear on a single gear.

[0041] 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, connecting the third through hole 1041 and the fourth through hole 1042. Thus, the second liquid passage cavity 1043 provides an additional, more direct fluid passage, allowing liquid flowing in from the fourth through hole 1042 to pass more smoothly through the inner cavity of the isolation sleeve 402 and flow to the third through hole 1041, thereby optimizing the liquid flow path and reducing flow resistance.

[0042] As another preferred embodiment of this embodiment, through-holes are provided on the front cover 102 and the rear cover 104, respectively. These holes communicate with the first liquid passage chamber 1011 and the interior of the isolation sleeve 402, respectively. The ends of the shafts connected to the first gear 105, the second gear 106, and the third gear 107 are mounted within the corresponding holes. In this technical solution, the transmission shaft connected to the first gear 105 and the mounting shafts connected to the second gear 106 and the third gear 107 are mounted within the through-holes, eliminating the need for blind holes. This allows some medium to flow freely through the mounting holes, thus avoiding the problems of medium accumulation and difficulty in flushing caused by blind holes.

[0043] Example 2

[0044] See also Figure 5 、 Figure 6 As another feasible embodiment, the difference between this embodiment and Example 1 is that the liquid inlet 1031 is provided on the top cover 101 and is connected to the first liquid passage chamber 1011. 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 is finally output from the liquid outlet 1036 connected to the second pump chamber 1033.

[0045] 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 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.

[0046] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments 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 scope of protection 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 assembly, 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 driven gear that mesh with each other, the magnetic transmission assembly comprises an inner magnetic rotor (403), an isolation sleeve (402), and an outer magnetic rotor (401), the inner magnetic rotor (403) is connected to the driving gear, 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 provided in the middle ring (103), and a second gear (106) and a third gear (107) meshing with the first gear (105) are provided on both sides thereof. The inner magnetic rotor (403) is transmission-connected to the first gear (105), and a first pump cavity (1032) and a second pump cavity (1033) are provided 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 provided 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 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); Through mounting holes are provided on the front cover (102) and the rear cover (104), respectively. The mounting holes are in communication with the first liquid passage cavity (1011) and the inner cavity of the isolation sleeve (402), and both 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. 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 flows out from the liquid outlet (1036); the other portion of the liquid flows through the first through hole (1021), the first liquid passage chamber (1011), the second through hole (1022), and enters the third pump chamber (1034), the fourth pump chamber (1035), and the fourth pump chamber (1036) under the action of the first gear (105) and the third gear (107). 035), 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), and a portion of the medium that enters the third pump chamber (1034) is conveyed to the second pump chamber (1033) by the rotation of the first gear (105).

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

4. The disassembly-free 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 in communication with the second pump chamber (1033).

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