CN-122014630-A - Magnetic pump device and installation method thereof

CN122014630ACN 122014630 ACN122014630 ACN 122014630ACN-122014630-A

Abstract

The application relates to the technical field of magnetic pumps and discloses a magnetic pump device and an installation method thereof. The magnetic pump device comprises a magnetic pump body, a driving piece and a shielding plate. The magnetic pump body comprises a separation sleeve and an outer magnetic steel body, and part of the outer magnetic steel body surrounds the outside of the separation sleeve. The driving piece comprises a driving end, and the driving end is connected with one end of the outer magnetic steel body, which is far away from the isolation sleeve. The shielding plate is arranged at the driving end and is positioned between the magnetic pump body and the driving piece. According to the application, through the direct connection structure of the driving piece and the magnetic pump body, an intermediate transmission mechanism is omitted, and the irradiation dose of the area where the driving piece is positioned is reduced through the shielding plate, so that the service life of the magnetic pump device in the working condition of the ultra-high radiation environment is prolonged.

Inventors

SUN DECHEN
QU TINGTING
ZHAO FANG
GAO GUOHONG
Yu Mingnan
ZHANG YUXING
HE XUANXUAN

Assignees

沈阳鼓风机集团核电泵业有限公司
沈鼓集团股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260309

Claims (10)

1. A magnetic pump apparatus, comprising: the magnetic pump body comprises a separation sleeve and an outer magnetic steel body, and part of the outer magnetic steel body surrounds the outside of the separation sleeve; the driving piece comprises a driving end, and the driving end is connected with one end of the outer magnetic steel body, which is far away from the isolation sleeve; the shielding plate is arranged at the driving end and is positioned between the magnetic pump body and the driving piece.
2. The magnetic pump apparatus of claim 1, wherein the magnetic pump body further comprises: A pump body including a pump chamber; one side of the pump cover is connected with the pump body, the other side of the pump cover is connected with the isolation sleeve, and the pump body, the pump cover and the isolation sleeve jointly define a pressure-bearing cavity for containing radioactive media; The pump cover comprises a connecting cylinder extending into the isolation sleeve, the pump cover is provided with a communication hole, one end of the communication hole is communicated with the space between the isolation sleeve and the connecting cylinder and is positioned on one side close to the isolation sleeve, and the other end of the communication hole is communicated with the pump cavity.
3. The magnetic pump device of claim 2, wherein an impeller is disposed inside the pump chamber, the magnetic pump body further comprising: the connecting shaft is arranged in the connecting cylinder through a bearing structure, one end of the connecting shaft is connected with the impeller, the other end of the connecting shaft is provided with an axial long hole extending along the axial direction, and the connecting shaft is also provided with a radial through hole communicated with one end of the axial long hole, which is close to the impeller, wherein the bearing structure is made of metal, ceramic or graphite; The inner magnetic steel body is arranged at one end of the connecting shaft away from the impeller, and comprises an extending part extending into the connecting cylinder and between the isolating sleeves, wherein the extending part is provided with inner magnetic steel, and the inner magnetic steel corresponds to the outer magnetic steel of the outer magnetic steel body.
4. The magnetic pump apparatus of claim 2, wherein the magnetic pump body further comprises: The first sealing gasket is arranged in a connecting area of the pump body and the pump cover; the second sealing gasket is arranged in the connecting area of the pump cover and the isolation sleeve; the first and second gaskets each include a flexible graphite wound gasket.
5. The magnetic pump apparatus of claim 2, further comprising: And the drainage pipeline is arranged on the pump body and is communicated with the lowest part of the pump chamber.
6. The magnetic pump apparatus of claim 1, further comprising: and the shielding layer is at least arranged in the wall body at one side of the isolation sleeve, which is close to the driving piece.
7. The magnetic pump apparatus of claim 1, wherein the outer magnetic steel body comprises: A cylindrical portion surrounding an outer portion of the spacer; the connecting disc is connected to one end of the cylindrical part, which is close to the driving part, and one side of the connecting disc, which is far away from the cylindrical part, is connected with the driving end of the driving part through a connecting part; the cylindrical part is far away from one side of the connecting disc and the connecting disc are respectively provided with a vent hole, and the vent holes comprise inclined holes.
8. The magnetic pump apparatus of claim 1, wherein the magnetic pump body further comprises: the annular supporting cylinder is arranged around the isolation sleeve, part of the outer magnetic steel body extends into the space between the annular supporting cylinder and the isolation sleeve, and a plurality of air-repellent holes are formed in the circumferential direction of the annular supporting cylinder; the annular supporting cylinder is connected to the supporting leg, and the supporting leg is used for supporting the annular supporting cylinder.
9. The magnetic pump apparatus of claim 1, further comprising: the base is provided with a guiding and positioning device, and the driving piece is arranged on the guiding and positioning device in a sliding way; the driving piece moves along the guiding and positioning device so as to push part of the outer magnetic steel body to the outside of the isolation sleeve.
10. A method of installing a magnetic pump device according to any one of claims 1 to 9, the magnetic pump device comprising a base on which a guiding and positioning device is provided, characterized in that the method comprises the steps of: Preparing a magnetic pump body, a driving piece and a shielding plate, wherein the magnetic pump body comprises an isolation sleeve and an outer magnetic steel body, and the driving end of the driving piece is connected with the outer magnetic steel body; Hoisting the driving piece and the outer magnetic steel body to the base, and arranging the driving piece on the guiding and positioning device; The driving piece moves along the guiding and positioning device so as to push part of the outer magnetic steel body to the outside of the isolation sleeve; And installing the shielding plate at the driving end of the driving piece, and enabling the shielding plate to be positioned between the magnetic pump body and the driving piece.

Description

Magnetic pump device and installation method thereof Technical Field The application belongs to the technical field of magnetic pumps, and particularly relates to a magnetic pump device and an installation method thereof. Background In the fields of special nuclear facilities such as medical isotope reactors and spent fuel post-treatment plants, the medium conveyed by the nuclear pump has higher corrosiveness and radioactivity than the medium in the field of general nuclear power industry. Nuclear pumps in the general nuclear power industry are limited by the radiation aging resistance of nonmetallic materials, and the total radiation resistance dose is generally at the level of 10 5 Gy. In the particular field described above, such irradiation doses may reach 10 7 Gy or even higher. The ultra-high emissivity greatly increases the design difficulty of the nuclear pump device. In general, various nonmetallic materials are used for parts such as shaft seals, bearings, insulation, lubricating oil (grease) and the like of pumps and motors in large quantities. Through testing, the irradiation resistance of most nonmetallic materials such as rubber, polytetrafluoroethylene, polyurethane and the like for long-term use at present is generally below the order of magnitude of 10 5 Gy, and the service life of parts and even equipment is greatly shortened by above the order of magnitude of 10 6 Gy. Conventional nuclear pump devices are essentially intolerable when irradiation levels above 10 7 Gy are reached. The magnetic drive pump belongs to a leakage-free pump, avoids using a shaft seal, and greatly reduces the risk of medium leakage. The magnetic pump device generally consists of a pump body and a motor, an intermediate transmission mechanism is generally designed between the motor and a shielding sleeve, and the intermediate transmission mechanism consists of a shaft, a bearing body, a coupling, external magnetic steel and other parts and is responsible for auxiliary support of the pump and intermediate transmission of the pump set. For the ultrahigh radiation environment, the problem of poor irradiation service life of nonmetallic materials used for the shaft seal component can be solved to a certain extent by adopting the magnetic pump. However, the non-metallic materials such as oil lubrication or grease lubrication are generally adopted for the bearing components of the intermediate transmission mechanism, and the service life of the lubricating oil or grease is affected by the ultra-high radiation environment, so that the operation and maintenance of the lubricating oil (grease) are difficult. The ultra-high radiation environment also affects the life of non-metallic materials such as sealing, insulation, lubricating oil (grease) and the like used in the motor part. Disclosure of Invention The present application is directed to solving at least one of the technical problems existing in the related art. Accordingly, a first aspect of the present application provides a magnetic pump apparatus. A second aspect of the present application provides a method of installing a magnetic pump apparatus. In view of the above, according to a first aspect of the embodiments of the present application, a magnetic pump device is provided, which includes a magnetic pump body, wherein the magnetic pump body includes a spacer sleeve and an outer magnetic steel body, a part of the outer magnetic steel body surrounds the spacer sleeve, a driving member including a driving end connected to an end of the outer magnetic steel body away from the spacer sleeve, and a shielding plate disposed between the driving end and the magnetic pump body. In an alternative embodiment, the magnetic pump body further comprises a pump body, a pump cover and a connecting cylinder, wherein the pump body comprises a pump cavity, one side of the pump cover is connected with the pump body, the other side of the pump cover is connected with the isolating sleeve, the pump body, the pump cover and the isolating sleeve jointly define a pressure-bearing cavity for containing radioactive media, the pump cover comprises the connecting cylinder extending into the isolating sleeve, the pump cover is provided with a communication hole, one end of the communication hole is communicated with a space between the isolating sleeve and the connecting cylinder, the communication hole is located on one side close to the isolating sleeve, and the other end of the communication hole is communicated with the pump cavity. In an alternative implementation mode, an impeller is arranged in the pump chamber, the magnetic pump body further comprises a connecting shaft, the connecting shaft is arranged in the connecting cylinder through a bearing structure, one end of the connecting shaft is connected with the impeller, an axial long hole extending along the axial direction is formed in the other end of the connecting shaft, a radial through hole communicated with one end, close to t