Magnetic drive pump device and installation method thereof
By eliminating the intermediate transmission mechanism and adopting a shielding plate and a forced cooling system, the lifespan and reliability issues of nuclear-grade pump devices in ultra-high radiation environments were solved, enabling long-term stable operation and safe maintenance of magnetic pumps in high radiation environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHENYANG BLOWER WORKS GRP NUCLEAR PUMP
- Filing Date
- 2026-03-09
- Publication Date
- 2026-05-12
AI Technical Summary
In ultra-high radiation environments, the bearing components of the intermediate transmission mechanism of nuclear-grade pump units suffer from shortened lifespans due to lubricating oil or grease, resulting in the inability of the unit to operate for extended periods. Furthermore, the sealing and insulation materials of the motor components are also affected.
Design a magnetic pump device that adopts a direct-drive structure to eliminate the intermediate transmission mechanism, reduces radiation dose through a shielding plate, and uses a bearing structure made of metal, ceramic or graphite materials, combined with a forced cooling system to improve the device's radiation tolerance.
It effectively extends the lifespan of the magnetic pump device in ultra-high radiation environments, improves reliability and maintainability, ensures the safety of maintenance personnel, and reduces design difficulty.
Smart Images
Figure CN122014630A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of magnetic pump technology, specifically relating to a magnetic pump device and its installation method. Background Technology
[0002] In specialized nuclear facilities such as medical isotope reactors and spent fuel reprocessing plants, the media transported by nuclear-grade pumps have higher corrosivity and radioactivity compared to those in general nuclear power plants. In general nuclear power plants, nuclear-grade pumps are limited by the radiation aging resistance of non-metallic materials, and their total radiation tolerance is typically around 10... 5 At the Gy level. In the aforementioned specific areas, this radiation dose could reach 10. 7 Gy or even higher.
[0003] The extremely high radiation levels significantly increase the design complexity of nuclear-grade pump systems. Typically, pumps and motors utilize a wide variety of non-metallic materials for components such as shaft seals, seals, bearings, insulation, and lubricants (greases). Testing has shown that the long-term radiation resistance of most non-metallic materials, such as rubber, polytetrafluoroethylene (PTFE), and polyurethane, is generally around 10... 5 Below the order of Gy, 10 6 Irradiation levels above the Gy level will significantly shorten the lifespan of components and even equipment. Irradiation levels reaching 10... 7 At speeds above Gy, conventional nuclear-grade pump systems are generally unable to withstand the load.
[0004] Magnetic drive pumps are a type of leak-free pump, eliminating the need for shaft seals and significantly reducing the risk of media leakage. A typical magnetic drive pump unit consists of a pump body and a motor. An intermediate transmission mechanism is usually designed between the motor and the shielding sleeve. This intermediate transmission mechanism comprises components such as a shaft, bearing housing, coupling, and external magnets, and is responsible for auxiliary support and intermediate transmission of the pump unit.
[0005] While magnetic pumps can address the issue of poor irradiation lifespan of non-metallic materials used in shaft seal components in ultra-high radiation environments, as mentioned above, the bearing components of intermediate transmission mechanisms, which typically use non-metallic materials such as oil or grease lubrication, will still be affected by ultra-high radiation environments. This can negatively impact the lifespan of the lubricating oil or grease, making its operation and maintenance difficult. Ultra-high radiation environments also affect the lifespan of non-metallic materials used in motor components, including seals, insulation, and lubricating oils (greases). Summary of the Invention
[0006] This application aims to address at least one of the technical problems existing in the related art.
[0007] Therefore, the first aspect of this application provides a magnetic pump device.
[0008] The second aspect of this application provides a method for installing a magnetic pump device.
[0009] In view of the above, according to a first aspect of the embodiments of this application, a magnetic pump device is provided, comprising: a magnetic pump body, the magnetic pump body including an isolation sleeve and an outer magnet, a portion of the outer magnet surrounding the outside of the isolation sleeve; a driving member, the driving member including a driving end, the driving end being connected to the end of the outer magnet away from the isolation sleeve; and a shielding plate disposed at the driving end and located between the magnetic pump body and the driving member.
[0010] In one optional embodiment, the magnetic pump body further includes: a pump body, the pump body including a pump chamber; a pump cover, one side connected to the pump body and the other side connected to the isolation sleeve, the pump body, the pump cover and the isolation sleeve together defining a pressure-bearing cavity for containing a radioactive medium; the pump cover includes a connecting cylinder extending into the isolation sleeve, the pump cover is provided with a communicating hole, one end of the communicating hole communicating with the space between the isolation sleeve and the connecting cylinder and located on the side close to the isolation sleeve, and the other end of the communicating hole communicating with the pump chamber.
[0011] In one optional embodiment, an impeller is disposed inside the pump chamber, and the magnetic pump body further includes: a connecting shaft, which is disposed inside the connecting cylinder via a bearing structure, one end of the connecting shaft being connected to the impeller, and the other end being provided with an axially extending elongated hole, and the connecting shaft also being provided with a radial through hole communicating with the end of the axially extending elongated hole near the impeller, wherein the bearing structure is made of metal, ceramic or graphite; and an inner magnet body, disposed at the end of the connecting shaft away from the impeller, the inner magnet body including a protrusion extending between the connecting cylinder and the isolation sleeve, the protrusion being provided with an inner magnet, the inner magnet being positioned corresponding to the outer magnet disposed on the outer magnet body.
[0012] In one optional embodiment, the magnetic pump body further includes: a first sealing gasket disposed in the connection area between the pump body and the pump cover; and a second sealing gasket disposed in the connection area between the pump cover and the isolation sleeve; the first sealing gasket and the second sealing gasket respectively comprise flexible graphite wound gaskets.
[0013] In one alternative embodiment, the magnetic pump device further includes a drainage pipe disposed in the pump body and communicating with the lowest point of the pump chamber.
[0014] In one alternative embodiment, the magnetic pump device further includes a shielding layer, at least disposed inside the wall of the isolation sleeve on the side near the drive member.
[0015] In one optional embodiment, the outer magnet body includes: a cylindrical portion surrounding the outside of the isolation sleeve; a connecting plate connected to one end of the cylindrical portion near the driving member, the side of the connecting plate away from the cylindrical portion being connected to the driving end of the driving member via a connector; ventilation holes are respectively provided on the side of the cylindrical portion away from the connecting plate and on the connecting plate, the ventilation holes including oblique holes.
[0016] In one optional embodiment, the magnetic pump body further includes: an annular support cylinder surrounding the isolation sleeve, with a portion of the outer magnet extending between the annular support cylinder and the isolation sleeve, and the annular support cylinder having a plurality of ventilation holes in its circumference; and a support foot, the annular support cylinder being connected to the support foot, the support foot being used to support the annular support cylinder.
[0017] In one optional embodiment, the magnetic pump device further includes: a base, on which a guide positioning device is provided, and the driving member is slidably disposed on the guide positioning device; the driving member moves along the guide positioning device to push a portion of the outer magnet to the outside of the isolation sleeve.
[0018] According to a second aspect of the embodiments of this application, an installation method for a magnetic pump device is provided for installing the magnetic pump device as described above. The magnetic pump device includes a base, and a guide positioning device is provided on the base. The installation method includes the following steps: preparing a magnetic pump body, a driving component, and a shielding plate. The magnetic pump body includes an isolation sleeve and an outer magnet. The driving end of the driving component is connected to the outer magnet. The driving component and the outer magnet are hoisted onto the base, and the driving component is positioned on the guide positioning device. The driving component is moved along the guide positioning device to push a portion of the outer magnet to the outside of the isolation sleeve. The shielding plate is installed on the driving end of the driving component, and the shielding plate is positioned between the magnetic pump body and the driving component.
[0019] The magnetic pump device and its installation method provided in this application can achieve at least the following technical effects: In this application, a portion of the outer magnet surrounds the outside of the isolation sleeve. The driving end of the drive component is connected to the end of the outer magnet furthest from the isolation sleeve, forming a direct connection structure between the drive component and the magnetic pump body. This eliminates the intermediate transmission mechanism, thereby avoiding the irradiation life problem of the lubricant in the intermediate transmission mechanism. A shielding plate is placed at the driving end of the drive component, located between the magnetic pump body and the drive component, which helps reduce the irradiation dose in the area where the drive component is located to 10. 5 The magnetic pump device is designed to operate at levels below the Gy level, enabling long-term operation in ultra-high radiation environments. Therefore, the magnetic pump device of this application can be used as a nuclear-grade pump in ultra-high radiation environments, such as those with irradiation levels below 10 Gy.6 Operating conditions at the Gy level or higher can effectively extend the life of the magnetic pump device, improve its reliability and maintainability, and maximize the personal safety of maintenance personnel.
[0020] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description
[0021] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of the structure of the magnetic pump device provided in the embodiments of this disclosure; Figure 2 This is a schematic diagram of the structure of the magnetic pump body provided in an embodiment of the present disclosure; Figure 3 This is a partial structural schematic diagram of the magnetic pump device provided in an embodiment of the present disclosure; Figure 4 A flowchart illustrating the installation method of the magnetic pump device provided in the embodiments of this disclosure.
[0022] The reference numerals in the attached figures are as follows: 1: Magnetic pump device; 100: Magnetic pump body; 101: Isolation sleeve; 102: Outer magnet body; 103: Outer magnet; 104: Pump body; 105: Pump chamber; 106: Suction port; 107: Discharge pipe; 108: Discharge port; 109: Pump cover; 110: Connecting cylinder; 111: Connecting hole; 112: Horizontal hole; 113: Inclined hole; 114: Impeller; 115: Connecting shaft; 116: Axial elongated hole; 117: Radial through hole; 118: Shaft 119: Inner magnet body; 120: Inner magnet; 121: First sealing gasket; 122: Second sealing gasket; 123: Drainage pipe; 124: Shielding layer; 125: Cylindrical part; 126: Connecting plate; 127: Connector; 128: Ventilation hole; 129: Annular support cylinder; 130: Air vent; 131: Support foot; 132: Guide vane; 133: Low-pressure chamber; 134: First bearing structure; 135: Second bearing structure; 200: Drive component; 201: Base; 202: Guide and positioning device; 300: Shielding plate. Detailed Implementation
[0023] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.
[0024] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.
[0025] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.
[0026] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.
[0027] Unless otherwise stated, the term "multiple" means two or more.
[0028] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.
[0029] Combination Figures 1 to 3As shown, this embodiment of the present disclosure provides a magnetic pump device 1, including a magnetic pump body 100, a drive member 200, and a shielding plate 300. The magnetic pump body 100 includes an isolation sleeve 101 and an outer magnet 102, with a portion of the outer magnet 102 surrounding the outside of the isolation sleeve 101. The drive member 200 includes a drive end, which is connected to the end of the outer magnet 102 away from the isolation sleeve 101. The shielding plate 300 is disposed at the drive end and located between the magnetic pump body 100 and the drive member 200.
[0030] In this design, a portion of the outer magnet 102 surrounds the outside of the isolation sleeve 101. The driving end of the drive component 200 is connected to the end of the outer magnet 102 furthest from the isolation sleeve 101, forming a direct connection between the drive component 200 and the magnetic pump body 100. This eliminates the intermediate transmission mechanism, thereby avoiding the irradiation lifespan problem of the lubricant in the intermediate transmission mechanism. In other words, by eliminating the intermediate transmission mechanism, the lifespan problem of non-metallic materials such as seals, lubricants, and insulating materials in ultra-high radiation environments is avoided. The drive component 200 includes a motor, and the driving end of the drive component 200 includes a motor shaft.
[0031] The shielding plate 300, disposed at the driving end of the driving member 200 and located between the magnetic pump body 100 and the driving member 200, helps to reduce the radiation dose in the area where the driving member 200 is located to 10. 5 The magnetic pump device 1 is designed to operate at levels below the Gy level, enabling long-term operation in ultra-high radiation environments. Specifically, a shielding plate 300 is installed between the magnetic pump body 100 and the drive component 200, with the drive end of the drive component 200 extending through the shielding plate 300 to shield radiation. In this embodiment, the shielding plate 300 can be fixed or movable, integral or separate, or designed as a wall or enclosure structure as needed. For example, the shielding plate 300 can be a separate, movable structure. Before the magnetic pump body 100 and the drive component 200 are installed, the shielding plate 300 is placed on both sides of the device. After the magnetic pump body 100 and the drive component 200 are installed, the shielding plate 300 is moved to the working position and fixed.
[0032] In summary, the magnetic pump device 1 of this disclosure can be used as a nuclear-grade pump device in ultra-high radiation environments, such as irradiation levels of 10... 6 Operating at levels exceeding Gy can effectively extend the lifespan of the magnetic pump unit 1, improve its reliability and maintainability, and maximize the safety of maintenance personnel. Furthermore, the magnetic pump's structural design reduces the design complexity of nuclear-grade pump units operating in ultra-high radiation environments.
[0033] Combination Figures 1 to 3As shown, in some embodiments, the magnetic pump body 100 further includes a pump body 104 and a pump cover 109. The pump body 104 includes a pump chamber 105. One side of the pump cover 109 is connected to the pump body 104, and the other side of the pump cover 109 is connected to an isolation sleeve 101. The pump body 104, pump cover 109, and isolation sleeve 101 together define a pressure-bearing cavity for containing a radioactive medium. The pump cover 109 includes a connecting cylinder 110 extending into the isolation sleeve 101, and the pump cover 109 is provided with a communicating hole 111. One end of the communicating hole 111 communicates with the space between the isolation sleeve 101 and the connecting cylinder 110 and is located on the side closer to the isolation sleeve 101. The other end of the communicating hole 111 communicates with the pump chamber 105.
[0034] The pump body 104 also includes an inlet 106 and a discharge pipe 107 communicating with the pump chamber 105, and the discharge pipe 107 is provided with a discharge outlet 108. During operation, ultra-high radioactive media is drawn in axially through the inlet 106 of the pump body 104, pressurized by the impeller 114, and then transported to the downstream pipeline or system through the discharge outlet 108 of the pump body 104. The magnetic pump body 100 can be a magnetic pump, which can be a single-stage or multi-stage structure. The inlet 106 and discharge outlet 108 can be designed according to actual needs and are not limited thereto.
[0035] One side of the pump cover 109 is connected to the pump body 104, and the other side of the pump cover 109 is connected to the isolation sleeve 101, so that the pump body 104, the pump cover 109, and the isolation sleeve 101 together form a pressure-bearing boundary that contains the ultra-high radioactive medium. That is, the pump body 104, the pump cover 109, and the isolation sleeve 101 together define a pressure-bearing cavity, which is used to contain the radioactive medium in order to realize the pumping of the ultra-high radioactive medium.
[0036] The connecting sleeve 110 can be used to install the connecting shaft 115. By extending the connecting sleeve 110 into the isolation sleeve 101, a space is formed between the isolation sleeve 101 and the connecting sleeve 110 to accommodate part of the inner magnet 119, and the flow of gas or medium can also be achieved.
[0037] The pump cover 109 has a connecting hole 111 inside, and the space between the isolation sleeve 101 and the connecting cylinder 110 forms a chamber that can contain gas or medium. One end of the connecting hole 111 communicates with the space between the isolation sleeve 101 and the connecting cylinder 110, and is located on the side closer to the isolation sleeve 101, such as... Figures 1 to 3As shown, the end of the connecting hole 111 is close to the top of the chamber between the isolation sleeve 101 and the connecting cylinder 110, which helps the gas in the chamber to be discharged in a timely manner through the connecting hole 111. The other end of the connecting hole 111 communicates with the pump chamber 105 to allow the flow of gas or medium. In some optional embodiments, the connecting hole 111 includes a horizontal hole 112 and an inclined hole 113 that are connected. One end of the horizontal hole 112 communicates with the space between the isolation sleeve 101 and the connecting cylinder 110, and the other end of the horizontal hole 112 communicates with one end of the inclined hole 113. The other end of the inclined hole 113 communicates with the pump chamber 105.
[0038] This embodiment of the invention takes into account that a medium needs to be injected into the magnetic pump body 100 before startup, at which time the cavity formed by the isolation sleeve 101 and the connecting cylinder 110 may contain a certain amount of gas. Furthermore, during operation, the magnetic pump body 100 may also be introduced from the outside or generate a certain amount of gas from the medium. If these gases cannot be discharged in time, they may cause cavitation in the pump during operation, and may also affect the cooling of the inner magnet 120 and the bearing structure, potentially leading to excessive pump vibration and noise. This embodiment of the invention automatically discharges these gases to the pump chamber 105 through the connecting hole 111, and then discharges them through the discharge pipe 107, where they are collected and processed by an external system. This reduces the possibility of pump cavitation, helps cool the inner magnet 120 and the bearing structure, and reduces pump vibration and noise.
[0039] Combination Figures 1 to 3 As shown, in some embodiments, an impeller 114 is disposed inside the pump chamber 105. The magnetic pump body 100 also includes a connecting shaft 115 and an inner magnet 119. The connecting shaft 115 is disposed inside the connecting cylinder 110 via a bearing structure. One end of the connecting shaft 115 is connected to the impeller 114, and the other end of the connecting shaft 115 is provided with an axially extending elongated hole 116. The connecting shaft 115 is also provided with a radial through hole 117 communicating with the end of the axially extending hole 116 near the impeller 114. The bearing structure is made of metal, ceramic, or graphite. The inner magnet 119 is disposed at the end of the connecting shaft 115 away from the impeller 114. The inner magnet 119 includes a protrusion extending between the connecting cylinder 110 and the isolation sleeve 101, and the protrusion is provided with an inner magnet 120, which corresponds to the position of the outer magnet 103 disposed on the outer magnet body 102.
[0040] The connecting shaft 115 is housed within the connecting cylinder 110 via a bearing structure. Two bearing structures can be provided: a first bearing structure 134 and a second bearing structure 135. For example, the connecting shaft 115 is housed within the connecting cylinder 110, with one end connected to the connecting cylinder 110 via the first bearing structure 134, and the other end connected to the connecting cylinder 110 via the second bearing structure 135. The bearing structure can be made of metal, ceramic, or graphite. In application, the material of the bearing structure can be selected based on the characteristics of the pumped medium, minimizing the use of non-metallic components to achieve the pumping of ultra-high radioactive media.
[0041] One end of the connecting shaft 115 is connected to the impeller 114, and the other end of the connecting shaft 115 is provided with an axial elongated hole 116, which extends axially along the connecting shaft 115. The axial elongated hole 116 can be located at the axial center of the connecting shaft 115. The connecting shaft 115 is also provided with a radial through hole 117, which extends radially along the connecting shaft 115. The radial through hole 117 can be located in the middle region of the connecting shaft 115, that is, it can be located in the cavity between the first bearing structure 134 and the second bearing structure 135. The radial through hole 117 communicates with the end of the axial elongated hole 116 near the impeller 114. When the connecting shaft 115 rotates, the radial through hole 117 assists the impeller 114, pumping the liquid sucked in by the axial elongated hole 116 through the radial through hole 117 into the cavity between the first bearing structure 134 and the second bearing structure 135.
[0042] Furthermore, the space between the connecting hole 111, the isolation sleeve 101 and the connecting cylinder 110, the axial elongated hole 116, the radial through hole 117, and the chamber between the first bearing structure 134 and the second bearing structure 135 can form a self-flushing structure for cooling. The cooling medium is a pump-transported medium, and the components being flushed and cooled include the first bearing structure 134, the second bearing structure 135, the inner magnet 120, and the isolation sleeve 101.
[0043] An application example, Figure 3The dashed arrows in the diagram indicate the flow direction of the cooling medium. During normal operation of the magnetic pump body 100, the connecting hole 111 of the pump cover 109 serves as the inlet for the cooling medium. The cooling medium is introduced into the pump chamber 105, specifically through the guide vane 132 at the outlet of the impeller 114. After passing through the connecting hole 111, it flows through the gap between the inner magnet 119 and the isolation sleeve 101, cooling the inner magnet 120 and the isolation sleeve 101. Then, through the axial elongated hole 116 of the connecting shaft 115, and the centrifugal force generated during rotation via the radial through hole 117, the pressure of the medium in the chamber between the first bearing structure 134 and the second bearing structure 135 is increased to a higher pressure than the pressure outside the first bearing structure 134 and the second bearing structure 135. The medium flows from the chamber to the outside of the first bearing structure 134 and the second bearing structure 135, providing lubrication and cooling to both structures. The cooling medium flowing through the first bearing structure 134 returns to the low-pressure chamber 133 behind the impeller 114, and the cooling medium flowing through the second bearing structure 135 can flow back to the low-pressure chamber 133 behind the impeller 114 through the axial through hole 118 provided inside the pump cover 109.
[0044] Combination Figures 1 to 3 As shown, the inner magnet 119 is located at the end of the connecting shaft 115 away from the impeller 114. The protruding part of the inner magnet 119 extends between the connecting cylinder 110 and the isolation sleeve 101. The protruding part is provided with an inner magnet 120. The inner magnet 120 corresponds to the position of the outer magnet 103 located on the outer magnet body 102. When the driving member 200 drives the outer magnet body 102 to rotate, it drives the outer magnet 103 to rotate, so that the inner magnet 120 is subjected to induced driving force, thereby driving the connecting shaft 115 and the impeller 114 to rotate and do work, thereby realizing the pumping of the medium.
[0045] Combination Figure 2 As shown, in some embodiments, the magnetic pump body 100 further includes a first sealing gasket 121 and a second sealing gasket 122. The first sealing gasket 121 is disposed in the connection area between the pump body 104 and the pump cover 109. The second sealing gasket 122 is disposed in the connection area between the pump cover 109 and the isolation sleeve 101. The first sealing gasket 121 and the second sealing gasket 122 respectively comprise flexible graphite wound gaskets.
[0046] A first sealing gasket 121 is disposed in the connection area between the pump body 104 and the pump cover 109 to achieve a seal between the pump body 104 and the pump cover 109. A second sealing gasket 122 is disposed in the connection area between the pump cover 109 and the isolation sleeve 101 to achieve a seal between the pump cover 109 and the isolation sleeve 101. In this embodiment, the flexible graphite wound gasket can specifically be a metal-graphite wound gasket with a metal skeleton to achieve the pumping of ultra-high radioactivity media.
[0047] Combination Figure 1 and Figure 2 As shown, in some embodiments, the magnetic pump device 1 further includes a drainage pipe 123, which is disposed in the pump body 104 and communicates with the lowest point of the pump chamber 105.
[0048] A drain pipe 123 is installed in the pump body 104 and connected to the lowest point of the pump chamber 105. During maintenance of the magnetic pump device 1, the drain pipe 123 can fully drain the ultra-high radioactive medium inside the pump, ensuring the personal safety of maintenance personnel. For example, the medium in the isolation sleeve 101 flows to the pump chamber 105 through the connecting hole 111 located at the bottom of the pump cover 109, and is then discharged through the drain pipe 123. A valve can be installed in the drain pipe 123 to regulate its opening and closing.
[0049] Combination Figures 1 to 3 As shown, in some embodiments, the magnetic pump device 1 further includes a shielding layer 124, which is disposed at least inside the wall of the isolation sleeve 101 on the side near the drive member 200.
[0050] A shielding layer 124 is installed inside the wall of the isolation sleeve 101 on the side closest to the drive component 200. The shielding layer 124, in conjunction with the shielding plate 300, forms two layers of shielding, constituting a complete shielding system. This improves the shielding effect and reduces the radiation dose in the drive component 200 area to an acceptable level, thereby reducing the design complexity of the drive component 200 and extending its lifespan. The materials and thicknesses of the shielding layer 124 and the shielding plate 300 can be designed according to actual needs.
[0051] Combination Figures 1 to 3 As shown, in some embodiments, the outer magnet 102 includes a cylindrical portion 125 and a connecting disk 126, with the cylindrical portion 125 surrounding the outside of the isolation sleeve 101. The connecting disk 126 is connected to the end of the cylindrical portion 125 near the drive member 200. The side of the connecting disk 126 away from the cylindrical portion 125 is connected to the drive end of the drive member 200 via a connector 127. Ventilation holes 128 are respectively provided on the side of the cylindrical portion 125 away from the connecting disk 126 and on the connecting disk 126, and the ventilation holes 128 include oblique holes.
[0052] Specifically, the outer magnet body 102 includes a cylindrical portion 125, a connecting disc 126, and a connector 127, wherein the connector 127 may be a cylindrical structure. The connector 127 is connected to the driving end of the driving member 200 and can rotate with the driving end. The cylindrical portion 125 is used to mount the outer magnet 103, and the cylindrical portion 125 surrounds the outside of the isolation sleeve 101 to achieve partial enclosure of the outer magnet body 102 around the outside of the isolation sleeve 101. The connecting disc 126 is used to connect the cylindrical portion 125 and the connector 127 into one unit.
[0053] The connecting plate 126 has ventilation holes 128, which include oblique holes, meaning that the ventilation holes 128 are inclined relative to the connecting plate 126. For example, along the direction from the drive member 200 to the magnetic pump body 100, the axes of the multiple ventilation holes 128 gradually expand. During the rotation of the outer magnet 102, the ventilation holes 128 act like a fan, increasing the speed of external air by doing work through the ventilation holes 128, and forcibly cooling the outer magnet 103 and the isolation sleeve 101.
[0054] A ventilation hole 128 is provided on the side of the cylindrical portion 125 away from the connecting plate 126. The ventilation hole 128 includes an oblique hole. Specifically, as shown... Figure 3 As shown, the end of the cylindrical part 125 away from the connecting plate 126 is close to the pump cover 109, but does not contact the pump cover 109. The air outlet direction of the ventilation hole 128 opened in the cylindrical part 125 is inclined towards the pump cover 109, which helps to quickly discharge the cooling air and improve the cooling effect.
[0055] A forced air cooling system is formed on the outer magnet body 102 through the ventilation hole 128. This system, combined with the forced cooling system of the inner magnet 120 and the bearing structure, improves the operational stability and reliability of the magnetic drive device and the bearing structure, thereby enhancing the operational stability and reliability of the magnetic pump device 1.
[0056] In this embodiment, the specific number and tilt angle of the ventilation holes 128 are not limited. For example, they can be designed based on the structure calculated by heat balance.
[0057] Combination Figure 1 and Figure 2 As shown, in some embodiments, the magnetic pump body 100 further includes an annular support cylinder 129 and a support foot 131. The annular support cylinder 129 surrounds the isolation sleeve 101. A portion of the outer magnet 102 extends between the annular support cylinder 129 and the isolation sleeve 101. The annular support cylinder 129 has multiple circumferential ventilation holes. The annular support cylinder 129 is connected to the support foot 131, which supports the annular support cylinder 129.
[0058] The annular support cylinder 129 can be connected to the pump cover 109 and surround the isolation sleeve 101. The annular support cylinder 129 is connected to the support foot 131, which supports the annular support cylinder 129. The annular support cylinder 129 and the support foot 131 together form an auxiliary support structure for the pump, which provides stable support for the magnetic pump.
[0059] A portion of the outer magnet 102 extends between the annular support cylinder 129 and the isolation sleeve 101. Ventilation holes 128 are respectively provided on the cylindrical portion 125 and the connecting plate 126. Multiple air vents are provided circumferentially on the annular support cylinder 129, enabling the auxiliary support structure to simultaneously provide rapid heat dissipation and protection for the rotating components of the outer magnet 102. Specifically, the multiple air vents circumferentially on the annular support cylinder 129 facilitate the rapid dissipation of air after cooling the outer magnet 103. The annular support cylinder 129 adopts an annular structure, enclosing the rotating components of the magnetic pump device 1 within it, preventing maintenance personnel from touching them and preventing the rotating components from breaking and flying out, potentially injuring personnel or other equipment. In this embodiment, the auxiliary support structure can be a split structure or an integral cast structure.
[0060] The magnetic pump body 100 is independently supported by the annular support cylinder 129 and the support foot 131, avoiding over-constraint caused by direct connection between the drive component 200 and the magnetic pump body 100. In this embodiment, the magnetic pump body 100 and the drive component 200 are independently supported, that is, the support part of the magnetic pump body 100 and the support part of the drive component 200 are not directly connected, so that the vibration of the magnetic pump body 100 and the drive component 200 do not interfere with each other, thereby reducing the vibration level of the magnetic pump device 1.
[0061] In some embodiments, the magnetic pump device 1 further includes a base 201, on which a guide positioning device 202 is provided, and a drive member 200 is slidably disposed on the guide positioning device 202. The drive member 200 moves along the guide positioning device 202 to push a portion of the outer magnet 102 to the outside of the isolation sleeve 101.
[0062] The drive component 200 includes a drive component base, and a linear groove extending axially along the drive component 200 is provided on the mounting surface of the base 201 that mates with the drive component base. Two sets of guide positioning devices 202 are mounted on each side of the drive component base. The guide positioning devices 202 and the linear grooves on the base 201 together form a guiding and positioning function. During installation, the guide positioning devices 202 and the linear grooves on the base 201 can accurately install the drive component 200, on which the outer magnet 102 is mounted, to the working position. For example, the drive component base moves along the guide positioning device 202 to push part of the outer magnet 102 to the outside of the isolation sleeve 101. The sliding engagement method between the drive component base and the guide positioning device 202 is not limited; for example, a sliding engagement can be achieved through a slide rail and a slide path. The base 201 can be extended, and the extended guide length L2 of the base 201 is greater than the extension length L1 of the outer magnet 102 into the annular support cylinder 129, so as to smoothly push part of the outer magnet 102 to the outside of the isolation sleeve 101.
[0063] This disclosure also provides an installation method for a magnetic pump device, used to install the magnetic pump device 1 as described above. The magnetic pump device 1 includes a base 201, and a guide positioning device 202 is provided on the base 201. (In conjunction with...) Figure 4 As shown, the installation method includes the following steps: S401. Prepare the magnetic pump body, drive unit and shielding plate. The magnetic pump body includes an isolation sleeve and an outer magnet. The drive end of the drive unit is connected to the outer magnet.
[0064] Specifically, the magnetic pump body 100 can be hoisted to the installation position using hoisting equipment, and then fixed to the installation position using structures such as support legs 131. The outer magnet 102 is then assembled to the drive end of the drive component 200 and secured.
[0065] S402. Hoist the drive unit and the outer magnet onto the base, and position the drive unit on the guide positioning device.
[0066] Specifically, the base 201 can be fixed at the installation position. The assembly of the drive unit 200 and the outer magnet 102 is then hoisted onto the base 201 using hoisting equipment. The drive unit 200 is positioned on the side of the base 201 furthest from the magnetic pump body 100, and aligned using adjusting bolts so that the position of the outer magnet 102 corresponds to the space between the annular support cylinder 129 and the isolation sleeve 101. The guide positioning device 202 is then installed on the base 201, fully extending into the linear groove on the base 201 and forming a certain gap with the bottom of the groove, allowing the drive unit 200 to move along the guide positioning device 202 toward the magnetic pump body 100.
[0067] S403. Move the drive component along the guide positioning device to push part of the outer magnet to the outside of the isolation sleeve.
[0068] Specifically, the drive component 200 can be moved along the guide positioning device 202 to push it axially into the working position. During the pushing of the drive component 200, the distance L3 between the end face of the connecting disc 126 of the outer magnet 102 and the end face of the annular support cylinder 129 can meet the design dimensions and tolerances. A dial indicator can also be fixed to the annular support cylinder 129 to mark the end face and outer circle of the outer magnet 102, and the position of the motor can be adjusted by adjusting the bolts until the diameter runout is no greater than 0.05 mm / m or the specific value required by the technical specifications, so that the outer magnet 102 and the inner magnet 119 are basically coaxial. Here, 0.05 mm / m refers to the allowable runout per meter of length of 0.05 mm. Then, the mounting bolts of the drive component 200 are tightened to fix the drive component 200.
[0069] Steps S402 and S403 enable the smooth installation of the outer magnet 102 and the precise alignment of the outer magnet 102 with the inner magnet 119, thereby achieving uniformity of the air gap in the magnetic drive and reliable operation.
[0070] S404. Install the shielding plate on the drive end of the drive unit and position the shielding plate between the magnetic pump body and the drive unit.
[0071] Install the shielding plate 300 on the driving end of the driving component 200, and position the shielding plate 300 between the magnetic pump body 100 and the driving component 200 to complete the installation of the magnetic pump device 1.
[0072] Of course, after installing the shielding plate 300, the piping system, wiring and related accessories of the magnetic pump body 100 can also be installed according to specific needs, and there are no restrictions on this.
[0073] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.
Claims
1. A magnetic pump device, characterized in that, include: The magnetic pump body includes an isolation sleeve and an outer magnet, with a portion of the outer magnet surrounding the outside of the isolation sleeve; A driving component includes a driving end, which is connected to the end of the outer magnet body away from the isolation sleeve; A shielding plate is disposed at the drive end and located between the magnetic pump body and the drive component.
2. The magnetic pump device according to claim 1, characterized in that, The magnetic pump body also includes: Pump body, including pump chamber; The pump cover is connected to the pump body on one side and to the isolation sleeve on the other side. The pump body, the pump cover, and the isolation sleeve together define a pressure-bearing cavity for containing radioactive media. The pump cover includes a connecting cylinder that extends into the isolation sleeve. The pump cover is provided with a connecting hole. One end of the connecting hole communicates with the space between the isolation sleeve and the connecting cylinder and is located on the side closer to the isolation sleeve. The other end of the connecting hole communicates with the pump chamber.
3. The magnetic pump device according to claim 2, characterized in that, An impeller is installed inside the pump chamber, and the magnetic pump body also includes: A connecting shaft is disposed inside the connecting cylinder via a bearing structure. One end of the connecting shaft is connected to the impeller, and the other end is provided with an axially extending elongated hole. The connecting shaft is also provided with a radial through hole communicating with the end of the axially extending elongated hole near the impeller. The bearing structure is made of metal, ceramic, or graphite. An inner magnet is disposed at the end of the connecting shaft away from the impeller. The inner magnet includes a protrusion that extends between the connecting cylinder and the isolation sleeve. The protrusion is provided with an inner magnet, and the position of the inner magnet corresponds to that of the outer magnet disposed on the outer magnet body.
4. The magnetic pump device according to claim 2, characterized in that, The magnetic pump body also includes: A first sealing gasket is disposed in the connection area between the pump body and the pump cover; A second sealing gasket is disposed in the connection area between the pump cover and the isolation sleeve; The first sealing gasket and the second sealing gasket each comprise a flexible graphite spiral wound gasket.
5. The magnetic pump device according to claim 2, characterized in that, Also includes: A drainage pipe is installed in the pump body and communicates with the lowest point of the pump chamber.
6. The magnetic pump device according to claim 1, characterized in that, Also includes: A shielding layer is provided at least inside the wall of the isolation sleeve on the side closest to the drive member.
7. The magnetic pump device according to claim 1, characterized in that, The external magnetic steel body includes: A cylindrical portion surrounds the outside of the isolation sleeve; A connecting plate is attached to one end of the cylindrical portion near the driving member, and the side of the connecting plate away from the cylindrical portion is connected to the driving end of the driving member via a connecting member; Ventilation holes are provided on the side of the cylindrical portion away from the connecting plate and on the connecting plate, and the ventilation holes include oblique holes.
8. The magnetic pump device according to claim 1, characterized in that, The magnetic pump body also includes: An annular support cylinder is provided around the isolation sleeve, and part of the outer magnet extends between the annular support cylinder and the isolation sleeve. The annular support cylinder has multiple ventilation holes in its circumference. A support foot is provided, and the annular support cylinder is connected to the support foot, which is used to support the annular support cylinder.
9. The magnetic pump device according to claim 1, characterized in that, Also includes: A base, on which a guide positioning device is provided, and a driving component is slidably disposed on the guide positioning device; The driving component moves along the guide positioning device to push a portion of the outer magnet to the outside of the isolation sleeve.
10. A method for installing a magnetic pump device, used for installing the magnetic pump device as described in any one of claims 1 to 9, the magnetic pump device comprising a base, wherein a guide positioning device is provided on the base, characterized in that, The installation method includes the following steps: Prepare a magnetic pump body, a drive unit, and a shielding plate. The magnetic pump body includes an isolation sleeve and an outer magnet. The drive end of the drive unit is connected to the outer magnet. The driving component and the outer magnet are hoisted onto the base, and the driving component is positioned on the guide and positioning device; The driving member is moved along the guide positioning device to push a portion of the outer magnet to the outside of the isolation sleeve; The shielding plate is installed on the driving end of the driving component, and the shielding plate is positioned between the magnetic pump body and the driving component.