CN113417856B - High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor - Google Patents
High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor Download PDFInfo
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- CN113417856B CN113417856B CN202110880535.2A CN202110880535A CN113417856B CN 113417856 B CN113417856 B CN 113417856B CN 202110880535 A CN202110880535 A CN 202110880535A CN 113417856 B CN113417856 B CN 113417856B
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- pump
- middle section
- suction
- cavity
- water
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Links
- 238000002347 injection Methods 0.000 title claims abstract description 15
- 239000007924 injection Substances 0.000 title claims abstract description 15
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 12
- 230000007246 mechanism Effects 0.000 abstract description 6
- 230000035939 shock Effects 0.000 abstract description 5
- 239000012535 impurity Substances 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D1/06—Multi-stage pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/041—Axial thrust balancing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to a high-pressure safety injection pump of a three-generation nuclear power unit of a water-water high-energy reactor, which is a horizontal double-shell multistage centrifugal pump, and comprises a pump cylinder body, a pump shaft, a plurality of first single-suction impellers and a plurality of second single-suction impellers, wherein a placement cavity is arranged in the pump cylinder body, a core package assembly capable of being integrally installed and extracted is arranged in the placement cavity, and the first single-suction impellers and the second single-suction impellers are installed on the pump shaft in series in two directions. The invention has reasonable structure, high temperature resistance, thermal shock resistance and impurity-containing working condition, and when in maintenance, the whole core package assembly comprising the pump cover, the rotor component, the stator component, the shaft seal component and the bearing component can be pulled out from the pump cylinder body for maintenance or replacement only after the main nut is loosened, so that the maintenance time is short; the axial force can be self-balanced under all working conditions, a balancing mechanism is not required to be arranged, and the reliability is good.
Description
Technical Field
The invention relates to a high-pressure safety injection pump, in particular to a high-pressure safety injection pump of a third-generation nuclear power unit of a water-water high-energy reactor, which has the advantages of reasonable structure, medium high temperature resistance, convenience in maintenance, no need of a balance mechanism and good reliability.
Background
The VVER (Water-WATER ENERGETIC Reactor) third generation nuclear power unit is a pressurized Water Reactor nuclear power unit which is gradually expanded in application in the world at present.
The high-pressure safety injection pump is a main device of a safety injection system of a pressurized water reactor nuclear power station, belongs to the level 2 of nuclear safety, and is started to inject boric acid water into a reactor core when the temperature of a loop is reduced due to the break of a loop system or the breakage of a main steam pipeline so as to increase the positive reactivity, so that the reactor core is rapidly cooled and submerged, the accident is prevented from being further expanded, and the safety of the reactor is ensured. The medium conveyed by the high-pressure safety injection pump is radioactive boron-containing water, and contains solid components such as concrete particles, paint coats, fibers and the like, so that the design working condition points of the pump are more, the performance curve is required to be suddenly reduced, and the pump is required to be resistant to medium high temperature of 150 ℃ and thermal shock.
The existing high-pressure safety injection pump cannot realize the whole pumping of the core package, and has defects in the convenience of overhaul; the impellers are arranged in the same direction, the axial forces generated by the impellers are overlapped step by step, the balance disc, the balance drum and other mechanisms are needed to be adopted for balancing, and the balance disc and the balance drum are easy to rub, abrade and sensitive to gaps, and are easy to fail and lose efficacy in a medium containing solid particles.
Disclosure of Invention
Aiming at the problems, the invention mainly aims to provide the high-pressure safety injection pump of the third-generation nuclear power unit of the water-water high-energy reactor, which has the advantages of reasonable structure, medium high temperature resistance, convenient maintenance, no need of a balance mechanism and good reliability.
The invention solves the technical problems by the following technical proposal: the water-water high-energy reactor third-generation nuclear power unit high-pressure safety injection pump is a horizontal double-shell multistage centrifugal pump, and comprises: the pump comprises a pump cylinder body, a pump shaft, a plurality of first single-suction impellers and a plurality of second single-suction impellers, wherein a placement cavity is arranged in the pump cylinder body, a core package assembly capable of being integrally installed and pulled out is arranged in the placement cavity, and the first single-suction impellers and the second single-suction impellers are installed on the pump shaft in series in two directions.
In a specific embodiment of the present invention, the number of the first single suction impellers is three, and the number of the second single suction impellers is three.
In a specific embodiment of the invention, the pump cylinder is provided with an inlet pipe and an outlet pipe which are communicated with the placement cavity by welding; four supporting plates are arranged on two wings of the pump cylinder body, and the lower plane of each supporting plate is equal to the central line of the pump set in height; one end of the lower part of the pump cylinder body is provided with a positioning round hole, and the other end is provided with a guiding rectangular groove.
In a specific embodiment of the present invention, the core pack assembly includes a pump cover, a rotor component, a stator component, a shaft seal component, and a bearing component;
The rotor component comprises a shaft, a first single suction impeller and a second single suction impeller;
The stator component comprises a suction section, a first middle section, a second middle section, a tail end middle section, a first radial guide vane, a second radial guide vane, a driving end bearing component, a non-driving end bearing component, a shaft seal component and a pump cover;
the rotor component rotates in the installation cavity, the rotor component comprises a pump shaft, the pump shaft transversely passes through the installation cavity and is supported for rotation through a driving end bearing component and a non-driving end bearing component, the driving end bearing component comprises a radial rolling bearing, and the non-driving end bearing component comprises two radial thrust rolling bearings;
The pump shaft is provided with three first single-suction impellers and three second single-suction impellers, and the first single-suction impellers and the second single-suction impellers are arranged on the pump shaft in series in two directions;
The stator component is integrally arranged in the arranging cavity and radially split, and comprises a suction section, a first middle section, a second middle section, a tail end middle section, a first radial guide vane and a second radial guide vane;
The first middle section and the first radial guide vane work together with the first single suction impeller, the second middle section and the second radial guide vane work together with the second single suction impeller, and the mounting directions of the first single suction impeller, the radial guide vane, the middle section and the second single suction impeller, the radial guide vane and the middle section are opposite, so that the axial force is self-balanced;
the suction section is arranged in front of the first middle section and is provided with a first cavity which is communicated with the first channel;
the middle section is arranged between the first middle section and the second middle section, and is provided with a first flow channel and a second flow channel;
The middle section is matched with the pump cylinder body to form a second cavity connected with the first flow channel, and the middle section is matched with the pump cylinder body to form a third cavity connected with the second flow channel;
the tail end middle section is arranged between the second middle section and the pump cover and is provided with a third flow passage;
The pump cover is provided with a fourth cavity, the pump cover is provided with a throttling sleeve, and a throttling gap formed by the throttling sleeve is used for blocking the fourth cavity and a third flow passage on the middle section of the tail end.
In a specific embodiment of the invention, the shaft seal member is provided with a cooling jacket.
The invention has the positive progress effects that: the high-pressure safety injection pump of the third-generation nuclear power unit of the water-water high-energy reactor provided by the invention has the following advantages: the invention has reasonable structure, high temperature resistance, thermal shock resistance and impurity-containing working condition, and when in maintenance, the whole core package assembly comprising the pump cover, the rotor component, the stator component, the shaft seal component and the bearing component can be pulled out from the pump cylinder body for maintenance or replacement only after the main nut is loosened, so that the maintenance time is short; the axial force can be self-balanced under all working conditions, a balancing mechanism is not required to be arranged, and the reliability is good.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a partial structure of the present invention.
Fig. 3 is a schematic view of another partial structure of the present invention.
Detailed Description
The following description of the preferred embodiments of the present invention is given with reference to the accompanying drawings, so as to explain the technical scheme of the present invention in detail.
Fig. 1 is a schematic structural view of the present invention, fig. 2 is a schematic structural view of a part of the present invention, and fig. 3 is another schematic structural view of a part of the present invention, as shown in fig. 1-3: the invention provides a high-pressure injection pump of a three-generation nuclear power unit of a water-water high-energy reactor, which is a horizontal double-shell multistage centrifugal pump, and comprises a pump cylinder body, a pump shaft, a plurality of first single-suction impellers and a plurality of second single-suction impellers, wherein a placement cavity is arranged in the pump cylinder body, a core package assembly capable of being integrally installed and extracted is arranged in the placement cavity, and the first single-suction impellers and the second single-suction impellers are installed on the pump shaft in series in two directions. In the embodiment example provided by the invention, the number of the first single suction impeller and the number of the second single suction impeller are three.
An inlet pipe 110 and an outlet pipe 120 which are communicated with the placement cavity are arranged on the outer surface of the pump cylinder body 100 through welding, a first channel 111 is arranged between the inlet pipe and the pump cylinder body, and a second channel 121 is arranged between the outlet pipe and the pump cylinder body.
The pump cylinder 100 is provided with 4 support plates 150 by welding, and is divided into two groups, and the two groups of support plates are respectively distributed on two wings of the pump cylinder and used for fixing the pump cylinder, and the lower plane of the support plates 150 is equal to the central line of the pump set, so that the height of the central line of the pump can be kept unchanged when the size change is caused by the temperature change of the medium of the pump cylinder.
Directly under the pump cylinder 100, one end is provided with a positioning round hole (marked A in the figure) for setting a positioning pin, and the other end is provided with a guiding rectangular groove (marked B in the figure) for setting a guiding key, which is used for reasonably guiding the thermal displacement of the pump cylinder under the working condition of high temperature and thermal shock.
A core pack assembly capable of being integrally assembled and extracted is arranged in the arranging cavity of the pump cylinder body, and comprises a rotor component (comprising a shaft 200, a first single suction impeller 210 and a second single suction impeller 220), a stator component (comprising a suction section 300, a first middle section 310, a second middle section 320, a tail end middle section 330, a middle section 340, a first radial guide vane 350 and a second radial guide vane 360), a driving end bearing component 230, a non-driving end bearing component 240, a shaft seal component 250 and a pump cover 400. The core bag component can be pulled out of the integral multi-placement cavity for maintenance or replacement after the main nut is loosened.
The rotor member is rotatable within the receiving cavity and includes a pump shaft 200, the pump shaft 200 traversing the receiving cavity and supported for rotation by a drive end bearing member 230 and a non-drive end bearing member 240, the drive end bearing member 230 including a radial rolling bearing and the non-drive end bearing member 240 including two radial +thrust rolling bearings.
The pump shaft 200 is provided with 3 first single suction impellers 210 and 3 second single suction impellers 220, and the first single suction impellers 210 and the second single suction impellers 220 are installed on the pump shaft 200 in series in two orientations.
The stator component is integrally arranged in the arranging cavity and is radially split, and comprises a suction section 300, a first middle section 310, a second middle section 320, an end middle section 330, an intermediate section 340, a first radial guide vane 350 and a second radial guide vane 360.
The first middle section 310 and the first radial guide vane 350 work in cooperation with the first single suction impeller 210, the second middle section 320 and the second radial guide vane 360 work in cooperation with the second single suction impeller 210, and the first single suction impeller, the radial guide vane, the middle section and the second single suction impeller, the radial guide vane and the middle section are installed in opposite directions, so that the axial force can be self-balanced.
The suction section 300 is disposed in front of the first middle section, and is provided with a first cavity 301, and the first cavity 301 communicates with the first channel 111.
An intermediate section 340 is disposed between the first and second intermediate sections 310, 320, the intermediate section 340 being provided with a first flow channel 341 and a second flow channel 342.
The intermediate section 340 cooperates with the pump cylinder 100 to form the second chamber 102 connected to the first flow path 341, and the intermediate section 340 cooperates with the pump cylinder 100 to form the third chamber 101 connected to the second flow path 342.
The terminal midsection 330 is mounted between the second midsection 320 and the pump cap 400, and a third flow passage 331 is provided.
The pump cover 400 is provided with a fourth cavity 401, the pump cover 400 is provided with a throttling sleeve 410, and a throttling gap formed by the throttling sleeve 410 is used for blocking the fourth cavity 401 and the third flow passage 331 on the tail end middle section 300.
In a preferred embodiment of the present invention, the shaft seal members 250 respectively disposed at the positions of the pump shaft 200 extending out of the suction section 300 and the pump cover 400 are cartridge type mechanical seals, the shaft seal members are provided with cooling jackets, the cooling jackets at the driving ends and the suction section 300 form a fifth cavity 302, and the cooling jackets at the non-driving ends and the pump cover 400 form a sixth cavity 402.
The following is a specific working procedure of the invention:
In operation, medium enters the first cavity 301 of the suction section 300 through the first channel 111 of the pump inlet pipe 110, flows into the inlet of the first single suction impeller 210, performs work through the cooperation of the first single suction impeller 210, the first radial guide vane 350 and the first middle section 310, and enters the cavity 102 through the first channel 341 of the middle section 340 after energy lifting.
The medium then flows into the inlet of the second single suction impeller 220 through the third flow passage 331 of the end middle section 330 in the reverse direction, works through the cooperation of the second single suction impeller 220, the second radial guide vane 360 and the second middle section 320, and the medium with further lifted energy enters the cavity 101 through the second flow passage 342 of the middle section 340 and finally flows out through the second passage 121 of the pump outlet pipe 120.
Since the first and second single suction impellers 210 and 220 on both sides of the middle section 340 are respectively engaged with the corresponding radial guide vanes and the middle section when the pump is operated, the generated axial forces are directed in the inlet direction of the impellers, so that the axial forces generated by the first and second single suction impellers 210 and 220 can be balanced with each other.
In order to further improve the balance force, a balance pipe 140 is further provided outside the pump cylinder 100, and the balance pipe is provided with a fourth flow passage 141, wherein the fourth flow passage 141 communicates the first cavity 301 with the fourth cavity 401, so that the residual axial force can be further balanced.
This allows complex balancing means (e.g. balancing discs, balancing drums) to be dispensed with, structurally increasing the reliability of this type of pump.
The fifth and sixth chambers 302, 402 are each vented with cooling water to prevent high temperature conduction of the medium to the shaft seal.
The invention provides the working conditions of medium high temperature resistance, thermal shock and impurity content, when in maintenance, the whole core package assembly comprising the pump cover, the rotor component, the stator component, the shaft seal component and the bearing component can be pulled out from the pump cylinder body for maintenance or replacement only after the main nut is loosened, and the maintenance time is short; the axial force can be self-balanced under all working conditions, a balancing mechanism is not required to be arranged, and the reliability is good.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the invention, and that various changes and modifications may be effected therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (1)
1. The utility model provides a water-water high energy reactor third generation nuclear power unit high pressure safety annotates pump which characterized in that: the high-pressure safety injection pump of the third-generation nuclear power unit of the water-water high-energy reactor is a horizontal double-shell multistage centrifugal pump, and the high-pressure safety injection pump of the third-generation nuclear power unit of the water-water high-energy reactor comprises: the pump comprises a pump cylinder body, a pump shaft, a plurality of first single-suction impellers and a plurality of second single-suction impellers, wherein a placement cavity is arranged in the pump cylinder body, a core package assembly capable of being integrally installed and extracted is arranged in the placement cavity, and the first single-suction impellers and the second single-suction impellers are installed on the pump shaft in series in two directions;
The number of the first single suction impellers is three, and the number of the second single suction impellers is three;
the pump cylinder body is provided with an inlet pipe and an outlet pipe which are communicated with the placement cavity through welding; four supporting plates are arranged on two wings of the pump cylinder body, and the lower plane of each supporting plate is equal to the central line of the pump set in height; one end below the pump cylinder body is provided with a positioning round hole, and the other end is provided with a guiding rectangular groove;
the core pack assembly comprises a pump cover, a rotor component, a stator component, a shaft seal component and a bearing component;
The rotor component comprises a shaft, a first single suction impeller and a second single suction impeller;
The stator component comprises a suction section, a first middle section, a second middle section, a tail end middle section, a first radial guide vane, a second radial guide vane, a driving end bearing component, a non-driving end bearing component, a shaft seal component and a pump cover;
the rotor component rotates in the installation cavity, the rotor component comprises a pump shaft, the pump shaft transversely passes through the installation cavity and is supported for rotation through a driving end bearing component and a non-driving end bearing component, the driving end bearing component comprises a radial rolling bearing, and the non-driving end bearing component comprises two radial thrust rolling bearings;
The pump shaft is provided with three first single-suction impellers and three second single-suction impellers, and the first single-suction impellers and the second single-suction impellers are arranged on the pump shaft in series in two directions;
The stator component is integrally arranged in the arranging cavity and radially split, and comprises a suction section, a first middle section, a second middle section, a tail end middle section, a first radial guide vane and a second radial guide vane;
The first middle section and the first radial guide vane work together with the first single suction impeller, the second middle section and the second radial guide vane work together with the second single suction impeller, and the mounting directions of the first single suction impeller, the first radial guide vane, the first middle section, the second single suction impeller, the second radial guide vane and the second middle section are opposite, so that the axial force is balanced;
the suction section is arranged in front of the first middle section and is provided with a first cavity which is communicated with the first channel;
the middle section is arranged between the first middle section and the second middle section, and is provided with a first flow channel and a second flow channel;
The middle section is matched with the pump cylinder body to form a second cavity connected with the first flow channel, and the middle section is matched with the pump cylinder body to form a third cavity connected with the second flow channel;
the tail end middle section is arranged between the second middle section and the pump cover and is provided with a third flow passage;
The pump cover is provided with a fourth cavity, a throttling sleeve is arranged on the pump cover, and a throttling gap formed by the throttling sleeve is used for blocking the fourth cavity and a third flow passage on the middle section of the tail end;
the shaft seal member is provided with a cooling jacket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880535.2A CN113417856B (en) | 2021-08-02 | 2021-08-02 | High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110880535.2A CN113417856B (en) | 2021-08-02 | 2021-08-02 | High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113417856A CN113417856A (en) | 2021-09-21 |
| CN113417856B true CN113417856B (en) | 2024-05-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110880535.2A Active CN113417856B (en) | 2021-08-02 | 2021-08-02 | High-pressure safety injection pump of third-generation nuclear power unit of water-water high-energy reactor |
Country Status (1)
| Country | Link |
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| CN (1) | CN113417856B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001049B (en) * | 2021-09-22 | 2024-05-14 | 上海凯泉泵业（集团）有限公司 | Balance structure of multistage split pump |
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| CN101749250A (en) * | 2008-11-30 | 2010-06-23 | 大连深蓝泵业有限公司 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
| CN103016353A (en) * | 2012-12-06 | 2013-04-03 | 大耐泵业有限公司 | Front-stage double suction type suction casing structure for sectional multi-stage pump |
| CN103225624A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
| CN204312359U (en) * | 2014-11-28 | 2015-05-06 | 上海凯泉泵业（集团）有限公司 | A kind of radial subdivision Double-casing multi-stage centrifugal pump |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN112628146A (en) * | 2020-12-31 | 2021-04-09 | 上海凯泉泵业（集团）有限公司 | Multistage double suction pump with vertical structure |
| CN215409227U (en) * | 2021-08-02 | 2022-01-04 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
-
2021
- 2021-08-02 CN CN202110880535.2A patent/CN113417856B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749250A (en) * | 2008-11-30 | 2010-06-23 | 大连深蓝泵业有限公司 | First-stage double-absorption section self-balanced multiple-stage centrifugal pump |
| CN103016353A (en) * | 2012-12-06 | 2013-04-03 | 大耐泵业有限公司 | Front-stage double suction type suction casing structure for sectional multi-stage pump |
| CN103225624A (en) * | 2013-04-24 | 2013-07-31 | 嘉利特荏原泵业有限公司 | Double-casing symmetric type radial subdivision multiple-stage centrifugal pump |
| CN204312359U (en) * | 2014-11-28 | 2015-05-06 | 上海凯泉泵业（集团）有限公司 | A kind of radial subdivision Double-casing multi-stage centrifugal pump |
| CN105697382A (en) * | 2014-11-28 | 2016-06-22 | 上海凯泉泵业（集团）有限公司 | Radially split double-shell multiple-stage centrifugal pump |
| CN112628146A (en) * | 2020-12-31 | 2021-04-09 | 上海凯泉泵业（集团）有限公司 | Multistage double suction pump with vertical structure |
| CN215409227U (en) * | 2021-08-02 | 2022-01-04 | 上海凯泉泵业（集团）有限公司 | High-pressure safety injection pump of water-water high-energy reactor third-generation nuclear power unit |
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| CN113417856A (en) | 2021-09-21 |
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