Magnetic drive pump liquid device

Abstract

The application relates to a magnetic driving pump liquid device, belonging to the technical field of liquid conveying equipment, which comprises a motor and an impeller. The impeller is rotatably arranged in a pump shell with an inlet and an outlet. The pump shell is divided into a pump liquid cavity and a cylindrical driving cavity which are communicated. A magnetic core rotor is coaxially arranged in the driving cavity. The rotating shaft of the magnetic core rotor is fixed with the impeller. The cavity wall of the pump liquid cavity is made of non-stick magnetic material. The outer side is coaxially sleeved with a non-stick magnetic transmission cup. An external magnet is embedded in the transmission cup and magnetically coupled with the magnetic core rotor. The impeller is rotatably matched with an annular groove at the cavity opening of the driving cavity. A sealing thread is arranged at the outer side of the groove. An outer protective cover can be screw-assembled to cover the transmission cup. The transmission shaft at the outer bottom surface of the transmission cup is connected with the motor. The motor drives the transmission cup to rotate, drives the magnetic core rotor and the impeller to rotate through magnetic coupling, and realizes liquid conveying. The magnetic driving pump liquid device can be quickly assembled and disassembled, is easy to clean, and the components directly contacting with the liquid can be used once, and is suitable for sterile occasions.

Description

Technical Field

[0001] This invention relates to the field of liquid conveying equipment technology, and specifically to a magnetically driven liquid pump device. Background Technology

[0002] Fluid pumps are core equipment in the field of fluid transportation, widely used in various liquid transportation scenarios such as chemical, pharmaceutical, food, and environmental protection industries. Among them, traditional centrifugal pumps have become the mainstream pumping equipment due to their simple structure and high transportation efficiency. Currently, most conventional centrifugal pumps on the market adopt a mechanical transmission structure in which the motor shaft directly drives the impeller. The motor and the pump chamber are sealed and isolated by a mechanical dynamic seal structure to prevent liquid leakage.

[0003] For example, with the rapid development of the hair care industry, scalp treatments, traditional Chinese medicine hair care, and scalp care have gradually become core value-added services in hair salons. These services generally require the use of circulating water pumps to continuously circulate and soak the customer's scalp with the medicinal solution to enhance the absorption of the care ingredients. Currently, the circulating water pumps used in hair salons are all conventional integrated centrifugal pumps, with the main structure as follows: Figure 1 As shown, it is roughly composed of a drive motor 3, a pump housing 1, an impeller assembly 2, and a mechanical seal assembly (usually an O-ring 5). The pump housing 1 is equipped with an inlet pipe 6 for liquid inlet and an outlet pipe 7 for liquid outlet. The power output shaft 4 of the drive motor 3 directly penetrates the pump housing 1, extends into the pump housing 1, and is fixedly connected to the impeller assembly 2. The mechanical seal assembly achieves dynamic sealing and waterproofing between the pump housing 1 and the drive motor 3. Traditional mechanical dynamic seals are the core sealing structure. During transmission, the rotating shaft (power output shaft 4) continuously rubs against the seal. Long-term use is prone to wear, aging, and deformation of the seal, leading to increased sealing gaps, dynamic seal failure, and easy liquid leakage and dripping. This not only wastes liquid media and corrodes surrounding parts of the equipment, shortening the equipment's service life, but also causes pollution. For example, in actual use in hair salons, the following unsolvable defects exist:

[0004] The risk of cross-infection is extremely high and cannot be effectively eliminated: After the water pump is used, the inner wall of the pump chamber, the surface of the impeller, the gap between the moving and stationary rings of the mechanical seal, and the connection gap between the impeller and the motor shaft will all retain the previous customer's washing and care solution, skin flakes, microorganisms, and pathogens. Since the existing pumping device (water pump) is difficult to disassemble quickly, it is difficult to achieve a thorough cleaning effect by pumping in clean water. Some dead corners inside the pump chamber will inevitably be difficult to clean. When subsequent customers use the pump, the residual contaminants will enter the new solution circulation system, causing cross-infection between customers and posing a great public health and safety hazard.

[0005] Some existing pump solutions use a peristaltic pump structure, only replacing the delivery hose that comes into contact with the liquid. However, the water output has obvious pressure pulsation, resulting in a very poor rinsing experience. This cannot meet the continuous and stable shampooing and rinsing needs of hair salons. Furthermore, because the connection between the hose and the connector is a closed annular space, there are still dead corners that are difficult to clean and cannot effectively eliminate the risk of contamination.

[0006] A few solutions use a disposable pump structure, where the drive motor and pump chamber are replaced as a whole. However, the cost of a single unit is extremely high, making it impossible to afford the cost of frequent replacements, and thus it has no commercial value.

[0007] Furthermore, even if the existing water pumps can disassemble the flow-through components that come into direct contact with the liquid, many auxiliary tools are required for disassembly and reassembly. They are generally connected by multiple bolts, so at least a series of bolts must be removed. This makes quick disassembly and reassembly impossible, and the replacement process is complex and time-consuming, which cannot adapt to the high-frequency, fast-paced service scenarios of hair salons. Moreover, when replacing the pipe fittings at the outlet of the pump, leakage is likely to occur at the interface, causing the leaked liquid to drip onto the surface of the pump body and then seep into the outer shell of the pump body, causing pollution.

[0008] In summary, no existing technology can adapt to high-frequency use, disassembly, and cleaning scenarios such as hair salons, and can fundamentally eliminate cross-infection, be easy to operate, and have controllable costs. It cannot meet the growing demands for hygiene and safety as well as user experience. Summary of the Invention

[0009] In view of this, the purpose of the present invention is to provide a magnetically driven pumping device to solve the problem that existing pumping devices are prone to leakage due to mechanical dynamic seals and are difficult to disassemble and clean quickly, thus causing cross-contamination.

[0010] This invention is achieved through the following technical solution:

[0011] A magnetically driven pumping device includes a motor and a motor-driven impeller. The impeller is rotatably mounted inside a pump casing to output liquid from an inlet end to an outlet end. The pump casing includes a pumping chamber for rotatable mounting of the impeller and a driving chamber. The pumping chamber is connected to the driving chamber and has the inlet end and outlet end. The driving chamber is a cylindrical cavity, inside which a magnetic core rotor is rotatably mounted. The impeller is fixed on the shaft of the magnetic core rotor. The cavity wall of the pumping chamber is made of a non-magnetic material. A non-magnetic transmission cup is rotatably fitted coaxially to the outside of the cavity wall of the pumping chamber. An external magnet is embedded in the cup wall of the transmission cup, and the external magnet is magnetically coupled to the magnetic core rotor and integrated with it. The mouth of the transmission cup faces... The impeller is coaxially arranged and located in the pump liquid chamber outside the cup opening; the cup opening end of the impeller is rotatably fitted with the annular groove formed by the outward folding and rolling of the cavity opening of the drive chamber; the outer side of the groove wall on the side of the annular groove away from the drive chamber is provided with a sealing thread for connecting an outer protective cover; the outer protective cover is a cylindrical cup-shaped structure, and the inner side wall of the cup opening is provided with an internal thread that mates with the sealing thread, so that the outer protective cover is threadedly connected to the groove opening end of the annular groove and covers the entire transmission cup; a transmission shaft is coaxially fixed to the center of the outer bottom surface of the transmission cup, and the transmission shaft is connected to a motor fixed to the outer bottom surface of the outer protective cover, so as to drive the magnetic core rotor in the drive chamber to rotate through the transmission cup.

[0012] Furthermore, the inner wall of the transmission cup contains a ring array of several external magnets; the main body of the magnetic core rotor is a cylindrical hollow structure made of non-magnetic material, and a ring array of several internal magnets corresponding to and coupled to the external magnets are embedded in the side wall of the main body, so that the magnetic core rotor and the transmission cup are integrated and can rotate synchronously.

[0013] Furthermore, the bottom center of the transmission cup has a coaxial spindle, which is fitted onto the main body for coaxial rotation.

[0014] Furthermore, a cover is coaxially mounted inside the drive cavity near the cavity opening. One end of the cover is convex and spherical, and the center of the inner bottom of the other end has a guide sleeve. The guide sleeve is coaxially rotatably fitted to allow the rotating shaft to pass through axially and contact the end face of the main body. The outer wall of the cover is threaded to the inner wall of the drive cavity opening, and has a sealing surface at the root of the threaded fit that matches the curvature of the inner wall of the drive cavity opening for sealing and fitting. A pair of shallow grooves are provided on the outer bottom surface of the cover, which allow a wrench of type [ to be inserted to rotate the cover.]

[0015] Furthermore, the cross-section of the annular groove is U-shaped, and the cross-section of the cup mouth sidewall of the transmission cup is U-shaped to match the annular groove; the outer wall of the annular groove has an annular step, the cylindrical surface of the annular step is provided with the sealing thread, and the annular end face of the annular step is pressed into contact with the cup mouth end of the outer cover through the sealing ring.

[0016] Furthermore, the quick-connect hole at the outlet end of the pump fluid chamber includes a cylindrical hole section, a conical hole section, and a flared hole section connected sequentially and integrally. The small end of the cylindrical hole section is integrally connected to the small end of the conical hole section, and the large end of the conical hole section is integrally connected to the large end of the flared hole section. The inner wall of the flared hole section protrudes towards the center as an arc surface. The quick-connect hole also includes a rubber connector embedded within it. The rubber connector includes an annular ridge and an inlet section integrally formed with the annular ridge. The sidewall thickness of the inlet section gradually decreases near its port to form an annular cutting edge structure at the port. The outer surface of the annular ridge is embedded in an annular groove formed by the concave junction of the conical hole section and the flared hole section. The inner sidewall of the annular ridge has an annular concave surface opposite to the annular groove. The inlet section can freely extend into the cylindrical hole section and can press the rubber connector so that the inlet section and the annular ridge are respectively tightly attached to the sidewalls of the flared hole section and the annular groove.

[0017] Furthermore, the rubber joint also includes an outlet section integrally connected to the annular protrusion. The diameter of the outlet section gradually decreases from the annular protrusion towards its outlet end, and then remains constant to form a cylindrical tube section. An annular retaining ring is integrally formed on the outer side of the cylindrical tube section. It also includes a bottle cap-shaped locking cap that is threaded onto the cylindrical tube section. The locking cap has a through hole in the center for the cylindrical tube section to pass through, so that when the locking cap is fully tightened, its inner bottom surface fits against the retaining ring and applies an axial clamping force to the rubber joint.

[0018] Furthermore, the retaining ring is a ring-shaped conical structure, and the large end of the retaining ring is in close contact with the inner bottom surface of the locking cover.

[0019] Furthermore, the pump casing adopts a spliced ​​structure that is vertically cut from the liquid outlet end. The spliced ​​structure includes an end cover part where the liquid inlet end is located and a body part where the magnetic core rotor is located. The end cover part and the body part are positioned by a number of positioning pins, and a sealing gasket is sandwiched between their mating surfaces. When the locking screw cap is fully tightened, the end cover part and the body part are firmly fixed as one.

[0020] Furthermore, the inlet port is connected to an external liquid storage container via a pipe using a flange or quick-connect fitting, and a control valve is installed on the pipe; the motor and the outer cover are fixed on a base, and the pump liquid chamber is located outside the base. The height of the base allows for easy removal of the end cover after disassembly.

[0021] The beneficial effects of this invention are as follows:

[0022] This magnetically driven pump device, based on the existing fundamental principle of magnetic coupling transmission, features a specific structural design that achieves mechanical dynamic seal-free transmission, completely eliminating the risk of leakage at the joints of dynamic sealing components in contact with the liquid, thus significantly improving sealing performance. Instead of the traditional rigid connection between the motor and impeller, this device employs a magnetic coupling structure between the external magnet of the transmission cup and the internal magnet of the magnetic core rotor, achieving synchronous transmission without mechanical connection. The entire liquid-contacting area is free of mechanical dynamic seals, completely solving the leakage problem caused by wear and aging of traditional mechanical dynamic seals, eliminating liquid leakage and dripping at the source. Furthermore, this device utilizes multiple sealing structures, including U-shaped annular groove clearance fit, sealing ring end face compression, threaded engagement sealing, and rubber joint sealing, forming a comprehensive sealing protection system that effectively prevents external moisture and dust from entering the device, significantly improving the overall sealing protection level of the equipment.

[0023] Secondly, this invention employs a fully physical isolation between the liquid flow area and the drive end where the motor is located, eliminating the risk of leakage between the liquid flow area and the drive end, and removing any hard-to-clean dead corners, resulting in a high level of hygiene. This device completely physically isolates the pump casing and pumping chamber from the motor, drive shaft, drive cup, and other power transmission components. All components in contact with the liquid are modular structures that can be independently disassembled and replaced once, achieving the requirements of sterility and no cross-infection. Moreover, this invention can also be conveniently and thoroughly cleaned when not used once, because the pump casing adopts an axially split split structure, divided into an end cover part and a body part. Combined with detachable magnetic core rotor (with impeller), rubber joints, and other components, maintenance can be performed without moving the entire machine, allowing for quick disassembly of all media contact parts, achieving comprehensive and thorough cleaning without dead corners, effectively preventing the accumulation of liquid and residual media and the growth of bacteria, perfectly adapting to the high hygiene requirements of pharmaceutical and food delivery scenarios.

[0024] Finally, the connection structure of the pump's outlet end for pipe fittings and other components offers quick installation, excellent sealing durability, and strong self-sealing. Specifically, the quick-connect hole at the outlet end adopts a three-section stepped hole structure, combined with a specially structured rubber joint and locking cap compression structure, achieving flexible flow guidance, buffer pressure relief, and self-sealing. The rubber joint's annular convex ridge is embedded and fixed within the annular groove, and the retaining ring disperses and transmits axial compression force. Based on a special channel design structure including annular concave surfaces and inlet / outlet sections, it can adaptively fit and seal according to the liquid flow rate. The locking cap continuously compresses and fixes axially, preventing the rubber joint from loosening, shifting, or falling off, ensuring long-term stable sealing and flow guidance at the outlet end, and adapting to high-flow, high-pressure pumping conditions.

[0025] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0026] Figure 1 A simplified structural diagram of an existing pumping device;

[0027] Figure 2 This is a front view of a magnetically driven pumping device according to the present invention;

[0028] Figure 3 This is a left view of a magnetically driven pumping device according to the present invention;

[0029] Figure 4 This is a partial cross-sectional view of a magnetically driven pumping device according to the present invention;

[0030] Figure 5 A schematic diagram showing the opening of the drive cavity with a cap.

[0031] Figure 6 An axial sectional view of a detachable pump casing;

[0032] Figure 7 for Figure 4 Enlarged view of point A in the middle;

[0033] Figure 8 This is a schematic diagram of a rubber joint;

[0034] Figure 9 This is another schematic diagram of a rubber joint;

[0035] Figure 10 This is a schematic diagram showing the disassembly of the pump casing's end cover and body.

[0036] In the diagram: 1. Pump housing; 2. Impeller assembly; 3. Drive motor; 4. Power output shaft; 5. O-ring; 6. Inlet pipe; 7. Outlet pipe; 8. Pump housing; 801. End cover; 802. Body; 9. Inlet end; 10. Magnetic core rotor; 1001. Main body; 1002. Inner magnet; 1003. Rotating shaft; 11. Impeller; 12. Pumping chamber; 13. Annular groove; 14. Drive chamber; 15. Core shaft; 16. Sealing thread; 17. Positioning pin; 18. Transmission cup; 19. Outer magnet; 20. Outer protective cover; 21. Transmission shaft; 22. Electric... 22. Machine, 23. Base, 24. Quick-connect hole, 2401. Cylindrical hole section, 2402. Conical hole section, 2403. Trumpet hole section, 25. Rubber joint, 2501. Inlet section, 2502. Annular convex rib, 2502. Annular concave surface, 2502. Outlet section, 2503. Cylindrical pipe section, 2503. 2504. Annular groove, 2505. Sealing ring, 26. Locking cover, 27. Sealing gasket, 28. Flange plate, 29. Cover, 30. Guide sleeve, 3001. Shallow groove, 3002. Liquid outlet end, 31. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] Please see Figure 2-4This invention provides a technical solution: a magnetically driven pumping device, the main structure of which includes a motor 22 and a centrifugal impeller 11. The impeller 11 is rotatably mounted inside the pump casing 8, and the rotation of the impeller 11 enables the directional transport of liquid from the inlet end 9 to the outlet end 31. Specifically, the inner shell of the pump casing 8 is divided into an interconnected pumping chamber 12 and a cylindrical driving chamber 14, which is the cavity of the main body 802 mentioned later. The outer wall of the pumping chamber 12 integrates an integral inlet end 9 and an outlet end 31, serving as liquid inlet and outlet channels. The driving chamber 14 is a regular cylindrical hollow cavity, and a cylindrical magnetic core rotor 10 is coaxially mounted inside the cavity. The magnetic core rotor 10 can rotate freely along the central axis of the driving chamber 14, and the magnets inside the magnetic core rotor 10 adopt a completely hidden integral closed structure. In actual manufacturing, a rotating shaft 1003 can be fixed at the center of the end face of the magnetic core rotor 10. The rotating shaft 1003 extends through the opening of the drive cavity 14 into the pumping cavity 12 and is fixedly connected to the center of the impeller 11, realizing synchronous rotation of the magnetic core rotor 10 and the impeller 11. In practice, the pumping cavity 12 can be made of non-magnetic materials such as plastic or 304 stainless steel, possessing non-magnetic and corrosion-resistant properties. A cylindrical non-adhesive transmission cup 18 is coaxially fitted onto the outer wall of the pumping cavity 12, and multiple permanent magnets 19 are uniformly embedded inside the cup wall. The opening of the transmission cup 18 is positioned facing the impeller 11 on the pumping cavity 12 side, and the impeller 11 is completely arranged inside the pumping cavity 12 outside the opening of the transmission cup 18, without structural interference. (See also...) Figure 6 The drive cavity 14 has an outwardly folded and rolled edge forming a U-shaped annular groove 13. The sidewall of the transmission cup 18 is rotatably mounted inside the annular groove 13, achieving a rotatable fit between the transmission cup 18 and the drive cavity 14. Furthermore, in this embodiment, a sealing thread 16 is machined on the outer side of the annular groove 13 opposite to the drive cavity 14, and a cylindrical cup-shaped outer cover 20 is provided. The inner sidewall of the outer cover 20 has a matching internal thread, allowing it to be detachably connected and fixed within the annular groove 13 via thread engagement. This design is compact and easy to assemble, disassemble, clean, and maintain. A cylindrical drive shaft 21 is coaxially fixed at the center of the outer bottom surface of the transmission cup 18. The drive shaft 21 passes through the through hole on the bottom surface of the outer cover 20 and is connected to the output shaft of the motor 22 fixed on the outer bottom surface of the outer cover 20. After the motor 22 starts, it drives the transmission cup 18 to rotate as a whole. Through the magnetic coupling between the outer magnet 19 and the magnetic core rotor 10 in the drive cavity 14, the magnetic core rotor 10, the rotating shaft 1003 and the impeller 11 rotate synchronously to complete the pumping operation. There is no mechanical dynamic seal connection structure in the part that comes into contact with the liquid, so the sealing performance is stronger. Compared with the traditional mechanical dynamic seal, the possibility of liquid leakage is smaller. Moreover, the entire internal space of the pump casing 8 is completely physically isolated from the motor 22 and its transmission mechanism and other supporting components. Therefore, the entire magnetic core rotor 10 can be disassembled for cleaning. There are no dead corners that are difficult to clean, and it is not easy for bacteria and medicine to remain.

[0041] In this embodiment, during the manufacturing process of the transmission cup 18, eight neodymium iron boron outer magnets 19 are evenly arranged in a circular array along the circumference inside its annular cup wall. All outer magnets 19 are evenly spaced and completely embedded and fixed inside the cup wall of the transmission cup 18, with no exposed structure. The main body 1001 of the magnetic core rotor 10 is injection molded from wear-resistant engineering plastic non-magnetic material, and has an overall hollow cylindrical structure, which reduces weight and does not affect the magnetic transmission effect. The outer wall of the main body 1001 of the magnetic core rotor 10 is also embedded with eight rectangular inner magnets 1002 in a ring array along the circumference. The number, size and installation spacing of the inner magnets 1002 correspond precisely to the outer magnets 19 inside the transmission cup 18. Each inner magnet 1002 forms radial magnetic coupling and adsorption with the corresponding outer magnet 19, so that the magnetic core rotor 10 and the transmission cup 18 form an integral structure without mechanical connection. When the transmission cup 18 rotates, it can drive the magnetic core rotor 10 to rotate at high speed synchronously through magnetic force. The transmission is smooth and without jamming, and at the same time, it completely eliminates the wear and leakage problems of traditional mechanical transmission.

[0042] As one of the specific implementation structures, the bottom center of the transmission cup 18 has a coaxially integrally formed protruding cylindrical mandrel 15. The outer diameter of the mandrel 15 is clearance-fitted with the inner diameter of the hollow body 1001 of the magnetic core rotor 10. During assembly, the hollow body 1001 of the magnetic core rotor 10 is directly coaxially sleeved on the outside of the mandrel 15. The mandrel 15 achieves coaxial positioning and radial limiting, effectively ensuring the coaxiality of the magnetic core rotor 10 and the transmission cup 18, and avoiding eccentricity and wobbling during rotation. The top of the mandrel 15 is rounded for easy installation. At the same time, the length of the mandrel 15 is adapted to the axial dimension of the magnetic core rotor 10, which can provide full axial support for the magnetic core rotor 10, further improving the structural stability and rotational smoothness during magnetic transmission.

[0043] In the specific design and production process, such as Figure 5As shown, a circular cover 30 can also be coaxially installed on the inner side of the drive cavity 14 near the cavity opening. The upper end of the cover 30 has a convex spherical structure to prevent the liquid from axially impacting the main body 1001 of the magnetic core rotor 10 during pumping. The other end of the cover 30 has a flat port structure, with a cylindrical guide sleeve 3001 integrally formed at the center of the bottom surface of the port. The inner diameter of the guide sleeve 3001 is precisely rotated to fit the outer diameter of the shaft 1003 of the magnetic core rotor 10. The shaft 1003 can rotate freely through the guide sleeve 3001, and the end face of the guide sleeve 3001 is in close contact with the upper end face of the main body 1001 of the magnetic core rotor 10, realizing the axial guidance and limiting of the shaft 1003. The outer wall of the cover 30 is machined with external threads, which match the internal threads on the inner side of the cavity opening of the drive cavity 14 for easy assembly and disassembly. The root of the threaded part of the cover 30 is machined with an arc-shaped sealing surface. The arc of the sealing surface is perfectly matched with the arc of the inner wall of the drive cavity 14. After the cover 30 is tightened, the sealing surface fits tightly with the inner wall of the cavity, achieving a seal at the port of the drive cavity 14. At the same time, two rectangular shallow grooves 3002 are symmetrically opened on the outer end face of the cover 30. The size of the shallow grooves 3002 is adapted to the snap-fit ​​size of the [type of special wrench]. During maintenance and assembly, the end of the wrench can be inserted into the shallow grooves 3002 to easily rotate the cover 30, completing the disassembly and assembly of the cover 30. The operation is simple and the sealing reliability is high. It should be noted that although the cover 30 also serves a sealing function, it is not solely for sealing. Unlike traditional dynamic seals, its main purpose is to prevent liquid from impacting the body of the magnetic core rotor 10 when pumped in, thus reducing vibration during operation. The seal of the cover 30 can achieve a thorough seal when cleaning is infrequent. Corresponding sealing rings can even be set at the guide sleeve 3001 and the aforementioned sealing surface. Although the shaft 1003 and the guide sleeve 3001 use a mechanical dynamic seal, this mechanical dynamic seal is not located on the transmission chain between the motor 22 and the impeller 11, so it will not cause liquid to leak from the pump casing 8 to the outside. Moreover, the inside of the pump casing 8 and its internal components (including the magnetic core rotor 10) are parts that can and need to be disassembled and cleaned.

[0044] In practice, the cross-section of the sidewall of the annular groove 13, formed by folding the opening of the drive cavity 14, is set as a standard U-shaped structure. The cross-section of the sidewall of the cup opening of the transmission cup 18 is simultaneously machined into a matching U-shaped structure. The two are fitted together with a clearance fit, ensuring that the transmission cup 18 can rotate freely while achieving precise radial positioning, preventing radial offset, simplifying the structure, and facilitating quick assembly, disassembly, cleaning, and maintenance. During manufacturing, the outer wall of the annular groove 13 is integrally formed with an annular step structure. The cylindrical outer surface of the annular step is machined with sealing threads 16 for matching the threaded assembly of the outer protective cover 20, providing dust and water protection, especially preventing leaked liquid from entering the outer protective cover 20 when the external pipe is connected to the liquid outlet 31. An annular sealing groove is opened on the horizontal annular end face of the annular step, and a rubber sealing ring 26 is installed in the groove. After the outer cover 20 is screwed tightly together, its cup end face tightly squeezes the sealing ring 26. The end face is sealed by the elastic deformation of the sealing ring 26, which effectively prevents external water vapor and dust from entering the internal transmission structure, and at the same time prevents liquid leakage in the pump, greatly improving the overall sealing protection level of the device.

[0045] In practical applications, such as beauty salons and hair salons where single-use applications are required, the magnetic core rotor 10, excluding the magnetic body, and the impeller 11 can be designed as plastic structures and molded in one piece using injection molding. Similarly, as a non-magnetic material, plastic can also be directly molded into the pump housing 8. This not only satisfies the material properties of allowing magnetic penetration and being non-magnetic itself, but also makes it easy to mass-produce and has a relatively low cost. After use, it can be directly unscrewed from the mouth of the transmission cup 18 and discarded as a whole. However, the power assembly, such as the drive motor 22 and the transmission cup 18, is retained. Moreover, this power assembly is the core component that can be quickly replaced with the pump body, so there is no risk of liquid leakage. The main cost of the entire pump device is actually concentrated here. Therefore, it has the prospect of quick replacement of some flow-through parts (pump housing 8 and magnetic core rotor 10 with impeller 11) and single-use.

[0046] In this embodiment, the quick-connect hole 24 at the outlet end 31 of the pump liquid chamber 12 is an integral three-section structure, such as... Figure 6 The structure consists of, in sequence, a cylindrical hole section 2401, a conical hole section 2402, and a flared hole section 2403. The small ends of the cylindrical hole section 2401 and the conical hole section 2402 are integrally connected, while the large ends of the conical hole section 2402 and the flared hole section 2403 are integrally connected. The inner wall of the flared hole section 2403 protrudes towards the center of the hole, forming an arc-shaped transition surface. A quick-connect fitting is embedded inside the quick-connect hole 24, such as... Figure 8The integrated rubber joint 25 shown can be made of silicone and includes an annular protrusion 2502 and an inlet section 2501. The thickness of the side wall of the inlet section 2501 near the port gradually decreases along the port direction, eventually forming an annular blade-like structure at the port position. This allows for flexible liquid flow guidance, buffering and pressure relief, and improved sealing. In the structure of the quick-connect hole 24, the connection position between the conical hole section 2402 and the flared hole section 2403 is recessed to form an annular groove 2505. The outer side of the annular protrusion 2502 of the rubber joint 25 is fixedly embedded inside the annular groove 2505. The inner side wall of the annular protrusion 2502 is correspondingly formed with an annular concave surface 250201, which fits snugly against the inner wall of the groove. This allows the liquid entering the inlet section 2501 of the rubber joint 25 to better expand and install the rubber joint 25, making the annular protrusion 2502 more firmly embedded in the annular groove 2505. This adaptively improves sealing and installation stability during operation. During assembly, the aforementioned inlet section 2501 extends freely into the cylindrical hole section 2401. After manually pressing the rubber joint 25, the enlarged annular protrusion 2502 can also be squeezed into the cylindrical hole section 2401, and finally... Figure 4 , Figure 5 , Figure 7 As shown, it is inserted into the corresponding annular groove 2505. At this time, the outer wall of the inlet section 2501 is completely in close contact with the inner wall of the horn hole section 2403, and the annular protrusion 2502 is tightly in close contact with the side wall of the annular groove 2505, so as to achieve a fully sealed fit of the quick-connect hole 24 and quick-release installation of the rubber joint 25, effectively preventing liquid backflow and leakage.

[0047] To better install the rubber joint 25, facilitate quick assembly and disassembly, and improve installation stability and sealing, such as Figure 4 , Figure 5 , Figure 7In this embodiment, an outlet section 2503 is added to the rubber joint 25 and integrally connected with the annular protrusion 2502. The diameter of the outlet section 2503 gradually shrinks along the liquid outflow direction, forming a conical guide structure with a curved inner surface. After the diameter shrinks to a set size, it maintains a constant diameter extension, forming a straight cylindrical tube section 250301. The outer wall of the cylindrical tube section 250301 is integrally formed with an annular retaining ring 2504. At the same time, a bottle cap-shaped locking cap 27 is also provided. The locking cap 27 has a through hole (not shown in the figure) in the center that is adapted to the cylindrical tube section 250301. The inner wall of the locking cap 27 is machined with internal threads, which are matched and sleeved on the outer wall of the cylindrical hole section 2401 of the quick-connect hole 24. During assembly, the cylindrical tube section 250301 of the rubber joint 25 passes through the central through hole of the locking cover 27. During the tightening of the locking cover 27, the inner bottom surface of the locking cover 27 gradually presses against the annular retaining ring 2504. After the locking cover 27 is fully tightened, an axial clamping force is continuously applied to the rubber joint 25, so that the rubber joint 25 is positioned and fixed, and the corresponding parts are firmly attached and fixed in the quick-connect hole 24, preventing the rubber joint 25 from loosening, falling off, or shifting, and ensuring the long-term stability of the sealing and guiding effect.

[0048] To enable the rubber joint 25 to withstand greater compressive force, it can be as follows: Figure 9 As shown, the retaining ring 2504 of the rubber joint 25 is configured as an annular truncated cone structure, with the end face of the larger end of the retaining ring 2504 facing the locking cover 27. When the locking cover 27 is tightened, the annular plane of the larger end of the retaining ring 2504 fully contacts the inner bottom surface around the perforation of the locking cover 27. Compared with the flat retaining ring 2504, in high-flow pumping applications, the conical retaining ring 2504 can evenly distribute the axial clamping force, avoiding local stress concentration that could lead to deformation and damage to the rubber joint 25. At the same time, the conical structure can improve the sealing performance, further preventing liquid leakage from the assembly gap and improving the sealing stability and structural durability of the outlet end 31.

[0049] In the above embodiments, when the application scenario is not disposable, such as when the pump casing 8 and impeller 11 are made of stainless steel, in order to ensure that the pumping device is thoroughly cleaned after each use, especially the parts and components that may come into contact with the liquid can be easily and thoroughly rinsed, such as... Figure 6 , Figure 10The pump housing 8 is designed as a modular structure with a vertically axially split half at the pump liquid chamber 12, based on the liquid outlet 31 (the quick-connect hole 24 mentioned below). It consists of two main modules: an end cap 801 and a main body 802, facilitating easy and thorough cleaning after disassembly. Specifically, the liquid inlet 9 is integrally formed on the end cap 801, and the drive chamber 14 is located on the main body 802. Corresponding positioning pins 17 and positioning holes are provided on the mating surfaces of the end cap 801 and the main body 802. Precise alignment and assembly are achieved through the positioning pins 17, ensuring assembly accuracy. A full-circle silicone sealing gasket 28 is sandwiched between the mating surfaces to fill the assembly gap and prevent liquid leakage from the pump. After the locking cap 27 is fully tightened, the end cap 801 and the main body 802 are pressed together, tightly fitting and fixing the two parts of the pump housing 8 into a single unit. No additional locking bolts are required, simplifying the assembly structure and facilitating quick disassembly and cleaning.

[0050] In practical use, a flange plate 29 can be fixedly installed at the inlet end 9 of the pump casing 8 as needed. The flange plate 29 then seals and connects to the delivery pipeline of the external liquid storage container. Alternatively, existing quick-connect fittings can be used for quick installation and disassembly. A control valve can be installed in series in the middle section of the delivery pipeline to precisely control the inlet flow rate and on / off status. Furthermore, such as... Figures 2-4 The device is also equipped with a base 23 for installation. The motor 22 and the outer cover 20 are fixedly installed on the top surface of the base 23 by bolts to achieve overall positioning and fixation. The pump liquid chamber 12 is suspended on the outside of the base 23 without obstruction or structural interference. The base 23 adopts a bracket structure, reserving ample space for disassembly and assembly. During disassembly and maintenance, there is no need to move the entire machine. The end cover 801 can be directly removed and moved horizontally, allowing the magnetic core rotor 10 and impeller 11 to be removed. Finally, the main body 802 can be unscrewed, enabling thorough cleaning of all components in contact with the liquid. The outer protective cover 20, the main protective shell of the machine, and the motor 22, which serves as the power equipment, can remain in place. After the above components are cleaned, they can be reassembled in sequence. This facilitates maintenance operations such as cleaning the pump cavity, inspecting the impeller 11, and replacing the rubber joint 25, greatly improving the convenience of operation and maintenance. It simply and reliably achieves thorough cleaning and reassembly of components in contact with the liquid medium. In particular, when locking and fixing the pump casing 8, the rubber joint 25 can be inserted and fixed at the same time, which is very convenient.

[0051] Finally, as a further explanation, the magnetic core rotor 10 in the above series of embodiments can actually be made as a magnetic levitation mounting structure with reference to existing magnetic levitation designs. That is, the magnetic core rotor 10 is suspended in the drive cavity 14 without contacting the cavity wall, so that there will be no rotating parts in frictional contact in the pump housing 8. Not only is the rotation smoother, but the problem of micro-powder that may be generated by rotational friction is also completely eliminated. However, from an economic point of view, this design is not suitable for general liquid pumping applications, especially not for the design of daily consumable equipment such as beauty and hairdressing equipment. It is suitable for applications of ultra-high purity liquid transportation.

[0052] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A magnetically driven pumping device, comprising a motor (22) and an impeller (11) driven by the motor (22), the impeller (11) being rotatably mounted inside a pump casing (8) to output liquid from an inlet end (9) to an outlet end (31), characterized in that: The pump housing (8) includes a pumping chamber (12) for the impeller (11) to be rotatably mounted and a drive chamber (14). The pumping chamber (12) is connected to the drive chamber (14) and the pumping chamber (12) is provided with the inlet end (9) and the outlet end (31). The drive chamber (14) is a cylindrical cavity, in which a magnetic core rotor (10) is rotatably mounted on a coaxial axis. The impeller (11) is fixed on the shaft (1003) of the magnetic core rotor (10). The cavity wall of the pumping chamber (12) is made of non-magnetic material. A non-magnetic transmission cup (18) is coaxially rotatably sleeved on the outside of the cavity wall of the pumping chamber (12). An external magnet (19) is embedded in the cup wall of the transmission cup (18). The external magnet (19) is magnetically coupled to the magnetic core rotor (10) and connected as one unit. The mouth of the transmission cup (18) is coaxially arranged facing the impeller (11), and the impeller (11) is located in the pump liquid chamber (12) outside the mouth of the cup; the mouth end of the impeller (11) is rotatably fitted with the annular groove (13) formed by the outward folding and rolling of the cavity opening of the drive chamber (14); the outer side of the groove wall of the annular groove (13) away from the drive chamber (14) is provided with a sealing thread (16) for connecting the outer protective cover (20), and the outer protective cover (20) is a cylindrical cup-shaped structure. The inner wall of the opening is provided with an internal thread that mates with the sealing thread (16) so that the outer cover (20) is threadedly connected to the groove end of the annular groove (13) and covers the entire transmission cup (18); a transmission shaft (21) is coaxially fixed at the center of the outer bottom surface of the transmission cup (18), and the transmission shaft (21) is connected to the motor (22) fixed on the outer bottom surface of the outer cover (20) so that the magnetic core rotor (10) in the drive cavity (14) is rotated through the transmission cup (18).

2. The magnetically driven pump device according to claim 1, characterized in that: The transmission cup (18) has a ring array of several external magnets (19) inside its cup wall; the main body (1001) of the magnetic core rotor (10) is a cylindrical hollow structure made of non-magnetic material, and a ring array of several internal magnets (1002) corresponding to and coupled to the external magnets (19) are embedded in the side wall of the main body (1001), so that the magnetic core rotor (10) and the transmission cup (18) are connected as one and can rotate synchronously.

3. The magnetically driven pump device according to claim 2, characterized in that: The transmission cup (18) has a core shaft (15) coaxially located at the center of its bottom, and the core shaft (15) is fitted and mounted coaxially with the main body (1001).

4. The magnetically driven pump device according to claim 3, characterized in that: The drive cavity (14) is coaxially covered by a cover (30) at the cavity opening end. One end of the cover (30) is convex and spherical, and the center of the inner bottom of the other end port has a guide sleeve (3001). The guide sleeve (3001) is coaxially rotatably fitted to allow the rotating shaft (1003) to pass through axially and contact the end face of the main body (1001). The outer wall of the cover (30) is threaded to the inner wall of the cavity opening of the drive cavity (14), and has a sealing surface at the root of the threaded fit that matches the curvature of the inner wall of the cavity opening of the drive cavity (14) for sealing and fitting. A pair of shallow grooves (3002) are provided on the outer bottom surface of the cover (30). The shallow grooves (3002) allow a wrench to be inserted to rotate the cover (30).

5. The magnetically driven pump device according to claim 1, characterized in that: The cross-section of the annular groove (13) is U-shaped, and the cross-section of the cup mouth sidewall of the transmission cup (18) is U-shaped to match the annular groove (13); The outer wall of the annular groove (13) has an annular step, and the cylindrical surface of the annular step is provided with the sealing thread (16). The annular end face of the annular step is pressed into contact with the cup end of the outer cover (20) through the sealing ring (26).

6. The magnetically driven pumping device according to claim 1, characterized in that: The quick-connect hole (24) of the outlet end (31) of the pump liquid chamber (12) includes a cylindrical hole section (2401), a conical hole section (2402), and a horn hole section (2403) connected in sequence. The small end of the cylindrical hole section (2401) is integrally connected to the small end of the conical hole section (2402), and the large end of the conical hole section (2402) is integrally connected to the large end of the horn hole section (2403). The inner wall of the horn hole section (2403) is convex towards the center as an arc surface. It also includes a rubber joint (25) embedded and fixed in the quick-connect hole (24). The rubber joint (25) includes an annular protrusion (2502) and an inlet section (2501) integrally formed with the annular protrusion (2502). The sidewall thickness of the inlet section (2501) gradually decreases near its port to form an annular blade-like structure at the port. The outer side of the annular protrusion (2502) is embedded in an annular groove (2505) formed by the concave junction of the tapered hole section and the flared hole section (2403). The inner sidewall of the annular protrusion (2502) has an annular concave surface (250201) opposite to the annular groove (2505). The inlet section (2501) can freely extend into the cylindrical hole section (2401) and press the rubber joint (25) so that the inlet section (2501) and the annular protrusion (2502) are respectively tightly attached to the side wall of the horn hole section (2403) and the annular groove (2505).

7. The magnetically driven pumping device according to claim 6, characterized in that: The rubber joint (25) also includes an outlet section (2503) integrally connected to the annular protrusion (2502). The diameter of the outlet section (2503) gradually decreases from the annular protrusion (2502) toward its outlet end, and then remains constant to form a cylindrical pipe section (250301). An annular retaining ring (2504) is integrally formed on the outer side of the cylindrical pipe section (250301). It also includes a bottle cap-shaped locking cap (27) that is threaded onto the cylindrical section (2401). The locking cap (27) has a through hole in the center for the cylindrical section (250301) to pass through, so that when the locking cap (27) is fully tightened, its inner bottom surface is in contact with the retaining ring (2504) and applies an axial clamping force to the rubber joint (25).

8. The magnetically driven pumping device according to claim 7, characterized in that: The retaining ring (2504) is a ring-shaped conical structure, and the large end of the retaining ring (2504) is in contact with the inner bottom surface of the locking cover (27).

9. The magnetically driven pumping device according to claim 7, characterized in that: The pump housing (8) adopts a spliced ​​structure that is vertically cut from the liquid outlet end (31). The spliced ​​structure includes an end cover (801) where the liquid inlet end (9) is located, and a body part (802) where the magnetic core rotor (10) is located. The end cover (801) and the body part (802) are positioned by a number of positioning pins (17), and a sealing gasket (28) is sandwiched between their mating surfaces. When the locking screw cap is completely tightened, the end cover (801) and the body part (802) are firmly fixed as one unit.

10. The magnetically driven pumping device according to claim 9, characterized in that: The inlet end (9) is connected to an external liquid storage container via a pipe using a flange plate (29) or a quick connector, and a control valve is installed on the pipe. The motor (22) and the outer cover (20) are fixed on a base (23). The pump liquid chamber (12) is located outside the base (23). The height of the base (23) is such that the end cover (801) can be easily removed and moved directly out of the end cover (801).

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