Fluorine-lined split magnetic drive pump

Abstract

The utility model provides a fluorine-lined split type magnetic drive pump, which belongs to the technical field of magnetic drive pumps and comprises a pump body, a connecting frame, a bearing seat, a pump shaft and an impeller, a fluoroplastic lining is arranged on the inner wall of the pump body, an isolation sleeve and a reinforcing sleeve are arranged between the connecting frame and the pump body, the isolation sleeve is sleeved on one side of the reinforcing sleeve close to the connecting frame, and a positioning hole part is arranged on the reinforcing sleeve. The upper end of the pump shaft is inserted into the positioning hole part, a flow channel opening is formed in the pump body, the impeller is provided with a positioning ring part facing the flow channel opening, a movable ring is arranged on the positioning ring part, and the fluoroplastic lining is provided with a static ring corresponding to the movable ring and a positioning ring groove part at the flow channel opening. The pump shaft is matched with the positioning hole part, and the positioning ring part is matched with the positioning ring groove part, so that the two ends of the impeller are comprehensively positioned, and the stability of the impeller in the rotating process is remarkably improved. Meanwhile, the design that the movable ring is matched with the static ring is adopted, the rotation resistance of the impeller is reduced, and reliable sealing performance is further provided.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, specifically to a fluoropolymer-lined split magnetic pump. Background Technology

[0002] A magnetic drive pump is a fluid transport device that uses magnetic force to transmit power, widely used in industries such as chemical, pharmaceutical, food, and environmental protection. Its working principle involves an electric motor driving a built-in rotor to generate a rotating magnetic field, which in turn drives the impeller inside the pump to rotate, thus achieving liquid transport. The biggest advantage of a magnetic drive pump is its leak-free design; the pump casing is isolated from the internal fluid, effectively preventing liquid leakage and contamination, making it suitable for transporting volatile, toxic, or corrosive liquids. Furthermore, magnetic drive pumps have a simple structure, are easy to maintain, and operate with low noise, making them widely used in various applications requiring tight sealing and safe transport. Traditional magnetic drive pumps typically only position the bottom of the impeller, which not only results in poor stability during impeller rotation but also easily leads to wear. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a fluoropolymer-lined split magnetic pump.

[0004] The technical solution adopted by this utility model is as follows: This application provides a fluoropolymer-lined split magnetic pump, including a pump body, a connecting frame, a bearing seat, a pump shaft, and an impeller. The pump body is connected to the bearing seat through the connecting frame. The impeller is rotatably disposed in the pump body and connected to the pump shaft. The inner wall of the pump body is provided with a fluoropolymer liner. An isolation sleeve and a reinforcing sleeve are provided between the connecting frame and the pump body. The isolation sleeve is fitted on the side of the reinforcing sleeve near the connecting frame. The reinforcing sleeve is provided with a positioning hole. The upper end of the pump shaft is inserted into the positioning hole. The pump body is provided with a flow channel opening communicating with the inlet and outlet. The impeller is provided with a positioning ring facing the flow channel opening. A moving ring is provided on the positioning ring. The fluoropolymer liner is provided with a stationary ring corresponding to the moving ring at the flow channel opening, and a positioning ring groove adapted to the positioning ring is provided.

[0005] In some embodiments, the fluoroplastic liner is provided with a positioning channel in the middle that is adapted to the pump shaft, and the lower end of the pump shaft is inserted into the positioning channel.

[0006] In some embodiments, a bushing is provided between the pump shaft and the impeller.

[0007] In some embodiments, the edges of the fluoroplastic liner and the reinforcing sleeve press against the pump body and the connecting frame, and a PTFE gasket is provided between the edges of the fluoroplastic liner and the reinforcing sleeve.

[0008] In some embodiments, the device further includes a drive shaft rotatably mounted on a bearing housing, with one end connected to a motor and the other end extending into a connecting frame connected to a rotating frame. The rotating frame has an annular groove, and a plurality of first magnetic elements are evenly arranged circumferentially on the inner wall of the annular groove. The impeller includes a linkage portion extending into the annular groove, and a plurality of second magnetic elements are evenly arranged circumferentially on the linkage portion. The second magnetic elements are embedded within the linkage portion, and the isolation sleeve and the reinforcing sleeve separate the first magnetic elements and the second magnetic elements.

[0009] In some embodiments, the two ends of the drive shaft are connected by a first bearing, a second bearing, and a bearing housing, respectively. The bearing housing is connected to a first bearing cap at one end near the connecting frame, and a second bearing cap is provided at the other end. A washer is provided between the first bearing cap, the bearing housing, and the connecting frame.

[0010] In some embodiments, a sealing cavity is provided within the bearing housing, and the first bearing and the second bearing are located within the sealing cavity, which is filled with coolant.

[0011] In some embodiments, the first bearing cap has a first groove portion communicating with the sealing cavity on the side near the first bearing, and the second bearing cap has a second groove portion communicating with the sealing cavity on the side near the second bearing.

[0012] The beneficial effects of this invention are as follows: This invention achieves comprehensive positioning of both ends of the impeller through the cooperation between the pump shaft and the positioning hole, and the cooperation between the positioning ring and the positioning ring groove, significantly improving the stability of the impeller during rotation. Simultaneously, the design of the rotating ring and stationary ring cooperation reduces the impeller's rotational resistance and provides reliable sealing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a cross-sectional view of a fluoropolymer-lined split magnetic pump according to the present invention.

[0015] Figure 2 This is a partial cross-sectional view of a fluoropolymer-lined split-type magnetic pump according to the present invention. Figure 1 ;

[0016] Figure 3 This is a partial cross-sectional view of a fluoropolymer-lined split-type magnetic pump according to the present invention. Figure 2 ;

[0017] Figure 4 This is a partial cross-sectional view of a fluoropolymer-lined split-type magnetic pump according to the present invention. Figure 3 . Detailed Implementation

[0018] The following description provides specific application scenarios and requirements for this specification, intended to enable those skilled in the art to make and use the contents of this specification. Various partial modifications to the disclosed embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments and applications without departing from the spirit and scope of this specification. Therefore, this specification is not limited to the embodiments shown, but rather to the widest scope consistent with the claims.

[0019] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "longitudinal", "lateral", "radial", "length", "width", "thickness", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element or component to have a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Secondly, the terms "first," "second," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components and should not be construed as limiting the embodiments of this application.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts.

[0022] Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Regarding the accompanying drawings of this application, it should be clearly understood that the drawings are for illustrative and descriptive purposes only and are not intended to limit the scope of this specification. It should also be understood that the drawings are not necessarily drawn to scale.

[0024] like Figures 1 to 4As shown in the figure, this specification provides a fluoropolymer-lined split magnetic pump, including a pump body 1, a connecting frame 2, a bearing seat 3, a pump shaft 4, and an impeller 5. The pump body 1 is connected to the bearing seat 3 via the connecting frame 2. The impeller 5 is rotatably disposed inside the pump body 1 and connected to the pump shaft 4. The inner wall of the pump body 1 is provided with a fluoropolymer liner 6, which is made of PTFE, PFA, etc., and is suitable for conveying highly corrosive, toxic, or high-purity media.

[0025] An isolation sleeve 7 and a reinforcing sleeve 8 are provided between the connecting frame 2 and the pump body 1. The isolation sleeve 7 is fitted onto the side of the reinforcing sleeve 8 near the connecting frame 2. The edges of the fluoroplastic liner 6 and the reinforcing sleeve 8 press against the pump body 1 and the connecting frame 2, thus forming a pump cavity with the pump body 1 and a transmission cavity with the connecting frame 2.

[0026] The reinforcing sleeve 8 is provided with a positioning hole 80, and the upper end of the pump shaft 4 is inserted into the positioning hole 80. The pump body 1 is provided with a flow channel 100 connecting the inlet and outlet. The impeller 5 is provided with a positioning ring 500 facing the flow channel 100. A moving ring 9 is provided on the positioning ring 500. The fluoroplastic liner 6 is provided with a stationary ring 10 at the flow channel 100 corresponding to the moving ring 9, and is provided with a positioning ring groove 600 adapted to the positioning ring 500. The fluoroplastic liner 6 is made of PTFE or PFA and has self-lubricating properties, which can reduce its rotational resistance with the impeller. Generally, the moving ring 9 and the stationary ring 10 are used to form a rotary seal. The contact surface between the two is very flat, which can maintain a high sealing efficiency during operation.

[0027] This configuration, through the engagement of the pump shaft 4 with the positioning hole 80 and the engagement of the positioning ring 500 with the positioning ring groove 600, achieves comprehensive positioning of both ends of the impeller 5, significantly improving the stability of the impeller 5 during rotation. Simultaneously, the engagement design of the moving ring 9 and the stationary ring 10 reduces the rotational resistance of the impeller 5, further improving sealing performance. This not only enhances the pump's operating efficiency but also effectively reduces wear and leakage risks, ensuring the pump's reliability and safety under various operating conditions.

[0028] Preferably, the isolation sleeve 7 is made of PFA material and the reinforcing sleeve 8 is made of PEEK material. The self-lubricating properties of PEEK can reduce the rotational resistance between it and the pump shaft 4.

[0029] Furthermore, the fluoroplastic liner 6 is provided with a positioning channel 601 in the middle that is adapted to the pump shaft 4. The lower end of the pump shaft 4 is inserted into the positioning channel 601. The design of the positioning channel 601 can ensure the accurate positioning of the pump shaft 4 in the fluoroplastic liner 6, reduce the offset of the pump shaft or unnecessary shaking, thereby helping to further reduce the vibration when the impeller 5 rotates.

[0030] A bushing 11 is provided between the pump shaft 4 and the impeller 5. The bushing 11 serves as an intermediary connecting the pump shaft 4 and the impeller 5, enhancing the mechanical strength of the entire structure. At the same time, the bushing 11 effectively reduces the direct contact between the pump shaft and the impeller, lowering friction and wear.

[0031] A PTFE gasket 12 is provided between the edge of the fluoroplastic liner 6 and the edge of the reinforcing sleeve 8, which can effectively prevent leakage of liquid medium between the pump body 1 and the connecting frame 2. This is especially important for pumps that transport corrosive or harmful media, ensuring operational safety and protecting the environment.

[0032] In some embodiments, a drive shaft 13 is further included. The drive shaft 13 is rotatably mounted on a bearing seat 3, with one end connected to a motor and the other end extending into a connecting frame 2 and connected to a rotating frame 14. An annular groove 140 is provided on the rotating frame 140. A plurality of first magnetic elements 15 are uniformly arranged circumferentially on the inner wall of the annular groove 140. The impeller 5 includes a linkage part 501 extending into the annular groove 140. A plurality of second magnetic elements 16 are uniformly arranged circumferentially on the linkage part 501. The second magnetic elements 16 are embedded in the linkage part 501. The isolation sleeve 7 and the reinforcing sleeve 8 separate the first magnetic elements 15 and the second magnetic elements 16, effectively preventing fluid leakage.

[0033] Because it uses magnetic drive, there is no direct contact between the pump's main moving parts, which significantly reduces wear and maintenance needs, and lowers noise and vibration. It also prevents media leakage, making it suitable for toxic, flammable, explosive, or high-purity materials.

[0034] The two ends of the drive shaft 13 are connected to the first bearing 17 and the second bearing 18 and the bearing housing 3 respectively. The bearing housing 3 is connected to the first bearing cover 19 at one end near the connecting frame 2, and the other end is provided with the second bearing cover 20. A washer 21 is provided between the first bearing cover 19, the bearing housing 3 and the connecting frame 2. The new bearing housing design provides rigid support, reduces the influence of radial / axial force transmitted by magnetic coupling on the rotor, avoids impeller 5 oscillation, and ensures smooth operation.

[0035] The bearing housing 3 is provided with a sealing cavity 22, in which the first bearing 17 and the second bearing 18 are located. The sealing cavity is filled with coolant to reduce bearing temperature rise and wear, making it particularly suitable for long-term high-load operation.

[0036] Furthermore, the first bearing cap 19 has a first groove 190 communicating with the sealing cavity 22 on the side near the first bearing 17, and the second bearing cap 20 has a second groove 200 communicating with the sealing cavity 22 on the side near the second bearing 18, which can effectively cool both ends of the bearing. A first sealing ring 191 is provided between the end of the first bearing cap 19 away from the sealing cavity 22 and the drive shaft 13, and a second sealing ring 201 is provided between the end of the second bearing cap 20 away from the sealing cavity 22 and the drive shaft 13, which improves the overall sealing performance of the sealing cavity 22.

[0037] In summary, after reading this detailed disclosure, those skilled in the art will understand that the foregoing detailed disclosure is presented by way of example only and is not restrictive. Although not explicitly stated herein, those skilled in the art will understand that the requirements of this application encompass various reasonable changes, improvements, and modifications to the embodiments. These changes, improvements, and modifications are intended to be made by this application and are within the spirit and scope of the exemplary embodiments of this application.

[0038] Furthermore, it should be understood that in the foregoing description of the embodiments of this application, various features are combined in a single embodiment, drawing, or description for the purpose of simplifying the understanding of a feature. However, this does not mean that the combination of these features is necessary, and those skilled in the art may readily identify some of the devices as separate embodiments when reading this application. That is, the embodiments in this application can also be understood as an integration of multiple sub-embodiments. It is also valid when each sub-embodiment contains fewer than all the features of a single foregoing disclosed embodiment.

[0039] Finally, it should be understood that the embodiments disclosed herein are illustrative of the principles of the embodiments of this application. Other modified embodiments are also within the scope of this application. Therefore, the embodiments disclosed herein are merely examples and not limitations. Those skilled in the art can adopt alternative configurations to implement the applications in this application based on the embodiments in this application. Therefore, the embodiments of this application are not limited to the embodiments precisely described in the application.

Claims

1. A fluoropolymer-lined split-type magnetic pump, characterized in that, The pump includes a pump body, a connecting frame, a bearing housing, a pump shaft, and an impeller. The pump body is connected to the bearing housing via the connecting frame. The impeller is rotatably mounted within the pump body and connected to the pump shaft. The inner wall of the pump body is lined with a fluoroplastic liner. An isolation sleeve and a reinforcing sleeve are provided between the connecting frame and the pump body. The isolation sleeve is fitted onto the reinforcing sleeve on the side near the connecting frame. The reinforcing sleeve has a positioning hole. The upper end of the pump shaft is inserted into the positioning hole. The pump body has a flow channel opening connecting the inlet and outlet. The impeller has a positioning ring facing the flow channel opening. A moving ring is provided on the positioning ring. The fluoroplastic liner has a stationary ring corresponding to the moving ring at the flow channel opening and has a positioning ring groove adapted to the positioning ring.

2. The fluoropolymer-lined split-type magnetic pump according to claim 1, characterized in that, The fluoroplastic liner has a positioning channel in the middle that is adapted to the pump shaft, and the lower end of the pump shaft is inserted into the positioning channel.

3. The fluoropolymer-lined split-type magnetic pump according to claim 1, characterized in that, A bushing is provided between the pump shaft and the impeller.

4. A fluoropolymer-lined split-type magnetic pump according to claim 1, characterized in that, The edges of the fluoroplastic liner and the reinforcing sleeve press against the pump body and the connecting frame, and a PTFE gasket is provided between the edges of the fluoroplastic liner and the reinforcing sleeve.

5. A fluoropolymer-lined split-type magnetic pump according to claim 1, characterized in that, It also includes a drive shaft, which is rotatably mounted on a bearing seat and connected to a motor at one end and to a rotating frame at the other end. The rotating frame is provided with an annular groove, and a plurality of first magnetic elements are evenly arranged circumferentially on the inner wall of the annular groove. The impeller includes a linkage part that extends into the annular groove. A plurality of second magnetic elements are evenly arranged circumferentially on the linkage part, and the second magnetic elements are embedded in the linkage part. The isolation sleeve and the reinforcing sleeve separate the first magnetic elements and the second magnetic elements.

6. A fluoropolymer-lined split-type magnetic pump according to claim 5, characterized in that, The two ends of the drive shaft are connected by a first bearing, a second bearing, and a bearing housing, respectively. The bearing housing is connected to a first bearing cap at one end near the connecting frame, and a second bearing cap is provided at the other end. A washer is provided between the first bearing cap, the bearing housing, and the connecting frame.

7. A fluoropolymer-lined split-type magnetic pump according to claim 6, characterized in that, The bearing housing has a sealed cavity, and the first bearing and the second bearing are located in the sealed cavity, which is filled with coolant.

8. A fluoropolymer-lined split-type magnetic pump according to claim 7, characterized in that, The first bearing cap has a first groove portion that communicates with the sealing cavity on the side near the first bearing, and the second bearing cap has a second groove portion that communicates with the sealing cavity on the side near the second bearing.

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