A hierarchical heat dissipation type nuclear fuel pump driving coil skeleton for nuclear power

Abstract

This invention discloses a staged cooling nuclear fuel pump drive coil frame for nuclear power plants, comprising a coil frame body, with grooves for coil windings on the inner ring sidewall of the coil frame body; a shunt ring fixedly mounted at the top of the coil frame body, and a collector ring fixedly mounted at the bottom of the coil frame body; cooling channels are provided on the sidewall of the coil frame body, and the shunt ring, cooling channels, and collector ring are sequentially connected; an input pipe is provided on one side of the shunt ring, and an output pipe is provided on one side of the collector ring; an adjustment component is provided on the collector ring, and an adjustment plate is rotatably mounted inside the output pipe; driving the adjustment plate to rotate adjusts the flow gap and flow rate of the cooling medium in the output pipe; through the cooperation of a thermal spring, worm gear, worm, and adjustment plate, the flow rate is increased when the heat generation of the coil frame increases and decreased when the heat generation decreases, avoiding heat dissipation failure or energy waste caused by a fixed flow rate.

Description

Technical Field

[0001] This invention relates to the field of nuclear fuel pump technology, specifically a staged heat dissipation type nuclear fuel pump drive coil frame for nuclear power. Background Technology

[0002] As the core power equipment of the cooling system of a nuclear power plant, the nuclear fuel pump's drive coil generates a large amount of Joule heat during operation. If the heat cannot be dissipated in time, it will cause the coil temperature to be too high, accelerating the aging of the insulation material. The heat dissipation performance of its drive coil frame directly determines the operational stability and service life of the nuclear fuel pump.

[0003] Existing nuclear fuel pump drive coil frames mostly use a fixed-flow cooling circuit, where the cooling medium flows through the flow channel to remove the heat generated by the coil. However, in actual operation, the load of the nuclear fuel pump will change dynamically with the reactor power, resulting in large fluctuations in the heat generated by the drive coil. When the heat generated by the coil increases, the fixed-flow cooling medium cannot remove the excess heat in time, which can easily cause the coil frame temperature to be too high. When the heat generated by the coil decreases, the excess cooling medium will cause energy waste in the cooling system.

[0004] Therefore, it is necessary to provide a staged heat dissipation nuclear fuel pump drive coil frame for nuclear power plants to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to provide a staged cooling nuclear fuel pump drive coil frame for nuclear power plants, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a staged cooling nuclear fuel pump drive coil frame for nuclear power, comprising a coil frame body, wherein the inner ring sidewall of the coil frame body is provided with a groove for coil winding; a shunt ring is fixedly provided at the top of the coil frame body, and a collector ring is fixedly provided at the bottom of the coil frame body; a cooling channel is provided on the sidewall of the coil frame body, and the shunt ring, cooling channel and collector ring are sequentially connected to achieve that the cooling medium is diverted from the shunt ring into the cooling channel, dissipates heat on the coil frame body when flowing through the cooling channel, and finally converges in the collector ring; an input pipe is provided on one side of the shunt ring, and an output pipe is provided on one side of the collector ring; an adjustment component is provided on the collector ring, and an adjustment plate is rotatably provided in the output pipe; the adjustment plate and the adjustment component are driven to rotate by the adjustment component according to the temperature change of the cooling medium in the collector ring, thereby adjusting the flow gap and flow rate of the cooling medium in the output pipe.

[0007] As a further embodiment of the present invention: the adjustment component includes a heat-conducting box, which is disposed on the side wall of the collector ring and located on the side of the output pipe. One end of the heat-conducting box away from the output pipe extends into the collector ring. A rotating shaft is rotatably disposed at the center of the heat-conducting box. A thermal spring is sleeved around the rotating shaft. One end of the thermal spring is fixedly connected to the side wall of the rotating shaft, and the other end is fixedly connected to the inner wall of the heat-conducting box.

[0008] As a further embodiment of the present invention: a worm gear is fixedly provided at the end of the rotating shaft away from the heat conduction box, and a worm wheel that meshes with the worm gear is provided above the rotating shaft. The end of the worm wheel away from the rotating shaft passes through the side wall of the output pipe and is fixedly connected to the adjustment plate.

[0009] As a further aspect of the present invention: a filter plate is provided inside the collecting ring, the top of the filter plate is fixedly connected to the top of the inner wall of the collecting ring, the cross-section of the filter plate is set in an "L" structure, the space on the side of the filter plate inside the collecting ring near the output pipe is a separation cavity, and the space on the other side of the filter plate inside the collecting ring is a collecting cavity, and the bottom of the cooling channel is connected to the collecting cavity.

[0010] As a further aspect of the present invention: the inner wall of the cooling channel is provided with heat-conducting protrusions, which are arranged in a ring array along the axis of the cooling channel.

[0011] As a further embodiment of the present invention: a cleaning ball is provided inside the collector ring, a conical cover is provided on the side of the filter plate near the output pipe, the conical cover is provided between the heat conduction box and the output pipe, the side wall of the filter plate is provided with a through hole for the cleaning ball to pass through, and the conical cover is provided with a filter hole.

[0012] As a further embodiment of the present invention: a baffle is slidably attached to the end of the conical cover away from the heat conduction box, the baffle is slidably and sealingly connected to the side wall of the collector ring, a connecting plate is fixedly provided at the end of the baffle away from the conical cover, the end of the connecting plate away from the baffle is sleeved on the periphery of the rotating shaft, and the connecting plate is threadedly connected to the rotating shaft.

[0013] As a further embodiment of the present invention: an impeller is rotatably disposed on the filter plate, the impeller is disposed at the position of the corresponding output pipe, a first toothed ring is disposed below the impeller, the first toothed ring and the impeller are fixedly connected, a second toothed ring is engaged with the outer periphery of the first toothed ring, the second toothed ring is rotatably connected to the bottom of the filter plate, and a scraper is fixedly disposed on the inner ring sidewall of the second toothed ring, which slides against the inner ring sidewall of the filter plate.

[0014] As a further aspect of the present invention, a flow divider is provided inside the flow divider ring.

[0015] As a further aspect of the present invention: an arc-shaped guide plate is fixedly provided inside the collecting ring to guide the cooling medium to flow directionally from the cooling channel outlet to the output pipe inlet.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the cooperation of the thermal spring, worm gear, worm, and adjusting plate, the thermal spring deforms according to the temperature of the cooling medium in the collector ring, and drives the adjusting plate at the angle of the output tube through the worm gear and worm, so as to increase the flow rate when the heat generation of the coil frame increases and decrease the flow rate when the heat generation decreases, thus avoiding heat dissipation failure or energy waste caused by fixed flow rate; through the cooperation of the rotating shaft and connecting plate, the baffle and the conical cover are separated when the flow rate is at its maximum, allowing the cleaning ball to circulate with the cooling medium through the cooling channel, cleaning the impurities attached to the inner wall of the cooling channel, and avoiding heat dissipation interference caused by the cleaning ball cleaning the cooling channel during normal heat dissipation. Attached Figure Description

[0017] Figure 1 This is a frontal three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the coil frame structure in this invention.

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the structure at point A in the middle.

[0020] Figure 4 This is a schematic diagram of the flow divider ring in this invention.

[0021] Figure 5 This is a schematic diagram of the structure of the adjustment plate in this invention.

[0022] Figure 6 This is a schematic diagram of the cross-sectional view of the top of the current collecting ring in this invention.

[0023] Figure 7 This is a schematic diagram of the conical cover in this invention.

[0024] Figure 8 For the present invention Figure 6 A schematic diagram of the structure at point B.

[0025] Figure 9 This is a schematic diagram of the scraper structure in this invention.

[0026] Figure 10 This is a schematic diagram of the structure of the thermal spring in this invention.

[0027] Figure 11 This is a schematic diagram of the cleaning ball in this invention.

[0028] Figure 12 This is a schematic diagram of the connecting plate in this invention.

[0029] In the diagram: 1. Coil frame body; 2. Diverter ring; 3. Wire groove; 4. Input pipe; 5. Collector ring; 6. Output pipe; 7. Heat-conducting box; 8. Cooling channel; 9. Heat-conducting protrusion; 10. Diverter baffle; 11. Adjusting plate; 12. Filter plate; 13. Thermosensitive spring; 14. Separation chamber; 15. Collector chamber; 16. Scraper; 17. Impeller; 18. Baffle; 19. Conical cover; 20. Worm gear; 21. Shaft; 22. Through hole; 23. First toothed ring; 24. Second toothed ring; 25. Cleaning ball; 26. Connecting plate. Detailed Implementation

[0030] Please see Figures 1-11 In this embodiment of the invention, a staged cooling nuclear fuel pump drive coil frame for nuclear power includes a coil frame body 1. The inner ring sidewall of the coil frame body 1 is provided with a wire groove 3 for coil winding. The wire groove 3 is arranged in a ring array along the axis of the coil frame body 1. The drive coil winding is installed on the wire groove 3. A shunt ring 2 is fixedly provided at the top of the coil frame body 1, and a collector ring 5 is fixedly provided at the bottom of the coil frame body 1. Cooling channels 8 are provided on the sidewall of the coil frame body 1. The cooling channels 8 are arranged in a ring array along the axis of the coil frame body 1. The shunt ring 2, the cooling channels 8 and the collector ring 5 are sequentially connected. When the coil frame body 1 is cooled, the external cooling system delivers the cooling medium to the shunt ring 2, and then the shunt ring 2 delivers it to the cooling channels 8. The cooling medium is then delivered to the coil frame body 1 through the cooling channels 8. Finally, the medium is collected in the collector ring 5 and flows back to the external cooling system.

[0031] An adjustment component is provided on the collector ring 5. An input pipe 4 is provided on one side of the shunt ring 2, and an output pipe 6 is provided on one side of the collector ring 5. The input pipe 4 and the output pipe 6 are respectively connected to the external cooling system so that the cooling medium is transported from the input pipe 4 to the shunt ring 2 and then flows back to the cooling system from the output pipe 6. An adjustment plate 11 is rotatably installed in the output pipe 6. The adjustment plate 11 is driven by the adjustment component. When the temperature of the cooling medium in the collector ring 5 rises, the adjustment component is heated and deformed, thereby driving the adjustment plate 11 to rotate. The rotation of the adjustment plate 11 changes its angle in the output pipe 6, that is, it adjusts the flow gap of the cooling medium in the output pipe 6 and adjusts the flow rate of the cooling medium in the output pipe 6. This achieves the adjustment of the flow rate of the cooling medium in the collector ring 5, the cooling channel 8, and the shunt ring 2, so that the flow rate of the cooling medium matches the temperature of the coil frame body 1 in real time. This avoids the cooling medium flow rate in the cooling channel 8 being fixed, which would affect the cooling and heat dissipation effect of the coil frame body 1 or increase the operating cost of the external cooling system.

[0032] It should be noted that the external cooling system is existing technology, and its detailed structure and working principle will not be described in detail here.

[0033] Please see Figure 1 , Figures 5-8 , Figure 10 Preferably, the adjustment component includes a heat-conducting box 7; the heat-conducting box 7 is disposed on the side wall of the collector ring 5 and on one side of the output pipe 6, with the end of the heat-conducting box 7 away from the output pipe 6 extending into the collector ring 5, and a rotating shaft 21 rotatably disposed at the center of the heat-conducting box 7, with a thermal spring 13 disposed around the periphery of the rotating shaft 21, one end of the thermal spring 13 being fixedly connected to the side wall of the rotating shaft 21, and the other end of the thermal spring 13 being fixedly connected to the inner wall of the heat-conducting box 7, so that when the temperature of the cooling medium in the collector ring 5 changes, the thermal spring 13 will deform and curl according to the temperature change, thereby driving the rotating shaft 21 to rotate.

[0034] The heat-conducting box 7 is made of heat-conducting material and contains heat-conducting oil to improve the heating efficiency of the thermal spring 13. The heat-conducting box 7 and the collector ring 5 are sealed together, and the rotating shaft 21 and the heat-conducting box 7 are sealed and rotated together.

[0035] Furthermore, a worm gear is fixedly installed at the end of the rotating shaft 21 away from the heat-conducting box 7, and a worm wheel 20 meshing with the worm gear is installed above the rotating shaft 21. The end of the worm wheel 20 away from the rotating shaft 21 passes through the side wall of the output pipe 6 and is fixedly connected to the adjusting plate 11. The worm wheel 20 and the output pipe 6 are connected in a sealed rotational manner. When the rotating shaft 21 rotates under the action of the thermal spring 13 being deformed and curled by heat, the rotating shaft 21 drives the worm wheel 20 to rotate, thereby causing the angle of the adjusting plate 11 in the output pipe 6 to be adjusted, so as to adjust the flow gap of the cooling medium in the output pipe 6. Through the setting of the rotating shaft 21 and the worm wheel 20, the rotating shaft 21 drives the worm wheel 20 to rotate, while the worm wheel 20 cannot drive the rotating shaft 21 to rotate. This avoids the possibility that the adjusting plate 11 may be rotated due to impact in the output pipe 6, and improves the stability of the adjusting plate 11 after adjusting the flow gap in the output pipe 6.

[0036] The combination of the heat-conducting box 7, the thermal spring 13, the worm gear 20, the rotating shaft 21, and the adjusting plate 11 enables real-time adjustment of the flow rate in the shunt ring 2, the cooling channel 8, and the shunting ring 5 based on the temperature of the cooling medium collected in the shunting ring 5. When the temperature of the cooling medium in the shunting ring 5 rises, the flow rate of the cooling medium is increased to match the heat generation of the coil frame body 1, thus preventing the heat dissipation failure of the coil frame body 1. When the temperature of the cooling medium in the shunting ring 5 is normal, the flow rate is reduced to adapt to low-load conditions and reduce energy consumption.

[0037] Furthermore, a filter plate 12 is provided inside the current collecting ring 5. The top of the filter plate 12 is fixedly connected to the top of the inner wall of the current collecting ring 5. The cross-section of the filter plate 12 is arranged in an "L" structure. The filter plate 12 divides the current collecting ring 5 into two spaces. The space on the side of the filter plate 12 inside the current collecting ring 5 that is closer to the output pipe 6 is the separation chamber 14, and the space on the other side of the filter plate 12 inside the current collecting ring 5 is the current collecting chamber 15. The bottom of the cooling channel 8 is connected to the current collecting chamber 15. The filter plate 12 can filter impurities in the cooling medium flowing out of the cooling channel 8, thereby preventing impurities from flowing back into the external cooling system and circulation loop with the cooling medium and affecting the cooling of the coil frame body 1.

[0038] It should be noted that the horizontal section of the filter plate 12 is below the bottom of the output pipe 6, and there is a gap between the bottom of the filter plate 12 and the bottom of the inner wall of the collecting ring 5. When the cooling medium in the cooling channel 8 is transported to the collecting ring 5, the impurities of the cooling medium will be isolated in the collecting cavity 15 under the action of the filter plate 12. Preferably, the bottom of the collecting ring 5 is provided with a discharge valve for draining sewage (not shown in the figure).

[0039] Please see Figures 1-3 The inner wall of the cooling channel 8 is provided with heat-conducting protrusions 9, which are arranged in a ring array along the axis of the cooling channel 8. The arrangement of the heat-conducting protrusions 9 increases the heat transfer area and improves the cooling and heat dissipation effect on the coil frame body 1.

[0040] To further improve the heat dissipation stability of the coil bobbin body 1 during long-term operation, please refer to... Figure 11 A cleaning ball 25 is provided inside the collecting ring 5. Multiple cleaning balls 25 are provided inside the collecting ring 5, and the diameter of the cleaning ball 25 is smaller than the diameter of the cooling channel 8. In this way, when the cleaning ball 25 flows through the cooling channel 8, it can scrape and clean its inner wall, preventing impurities from adhering to it and affecting the subsequent heat dissipation and cooling effect. The diameter of the cleaning ball 25 is larger than the gap between the bottom of the filter plate 12 and the bottom of the inner wall of the collecting ring 5, so that the cleaning ball 25 will not get stuck between the bottom of the filter plate 12 and the collecting ring 5.

[0041] Please see Figures 6-8 , Figure 11 A conical cover 19 is provided on the side of the filter plate 12 near the output pipe 6. The conical cover 19 is located between the heat conduction box 7 and the output pipe 6. The side wall of the filter plate 12 is provided with a through hole 22 for the cleaning ball 25 to pass through. The through hole 22 is located between the conical cover 19 and the heat conduction box 7. The conical cover 19 is provided with filter holes, so that the cleaning ball 25 can be collected in the conical cover 9 under the action of the cooling medium flow.

[0042] Preferably, an arc-shaped guide plate is provided inside the collector ring 5. The arc-shaped guide plate is located on the side of the output pipe 6 away from the heat conduction box 7. The end of the arc-shaped guide plate away from the output pipe 6 extends to the connection point of the nearest set of cooling channels 8 and the collector ring 5. This allows the cooling medium in the collector ring 5 to flow in one direction, that is, from the connection point of the cooling channel 8 and the collector ring 5 to the connection point of the output pipe 6 and the collector ring 5. This allows the cleaning ball 25 to flow from the collector ring 5 to the output pipe 6. Please refer to this carefully. Figure 7 , Figure 11 To allow the cleaning ball 25 to pass through the through hole 22 and enter the conical cover 19 more effectively, a guide block is fixedly installed on the side wall of the collector ring 5 away from the output pipe 6. This prevents the cleaning ball 25 from passing through the through hole 22. Figure 11 In the image, the arrow indicates the direction of movement of the cleaning ball 25.

[0043] Please see Figures 7-8 , Figure 12 A baffle 18 is slidably attached to the end of the conical cover 19 away from the heat-conducting box 7. The baffle 18 is slidably and sealingly connected to the side wall of the collector ring 5. A connecting plate 26 is fixedly provided at the end of the baffle 18 away from the conical cover 19. The end of the connecting plate 26 away from the baffle 18 is sleeved on the periphery of the rotating shaft 21, and the connecting plate 26 is threadedly connected to the periphery of the rotating shaft 21. When the rotating shaft 21 rotates, the rotating shaft 21 causes the connecting plate 26 to move away from the collector ring 5 through the thread, thereby causing the baffle 18 to move and separate from the port of the conical cover 19. After the baffle 18 separates from the port of the conical cover 19, the cleaning ball 25 then... The cooling medium flows into the output pipe 6 and then into the external cooling system. It then flows into the diversion ring 2 and the cooling channel 8 again, completing the cleaning of the inner wall of the cooling channel 8. When the baffle 18 is completely separated from the port of the conical cover 19, the adjusting plate 11 rotates to a horizontal state. At this time, the flow gap of the cooling medium in the output pipe 6 is the largest, which also allows the cleaning ball 25 to pass through. This prevents a large number of impurities from adhering to the inner wall of the cooling channel 8 during long-term operation, which would affect the cooling effect of the cooling medium on the coil frame body 1 and cause an increase in the heat generation of the coil frame body 1.

[0044] Please see Figure 7 , Figure 9An impeller 17 is rotatably mounted on the filter plate 12. The impeller 17 is positioned at the corresponding output pipe 6 and is located on the horizontal section of the filter plate 12. A first toothed ring 23 is positioned below the impeller 17. The first toothed ring 23 and the impeller 17 are fixedly connected by a fixing rod. A second toothed ring 24 is engaged with the outer periphery of the first toothed ring 23. The second toothed ring 24 is rotatably connected to the bottom of the filter plate 12. A scraper 16 is fixedly mounted on the inner ring sidewall of the second toothed ring 24 and slides against the inner ring sidewall of the filter plate 12. The gap between the guide block and the filter plate 12 is sufficient for the scraper 16 to pass through. A notch is also provided between the arc-shaped guide plates for the scraper 16 and the second toothed ring 24 to rotate and pass through.

[0045] In actual use, initially, the coil frame body 1 generates normal heat, the thermal spring 13 is in normal condition, and the adjusting plate 11 is vertical in the output tube 6, meaning the flow gap of the cooling medium in the output tube 6 is minimal. At this time, by reducing the flow rate, the residence time of the cooling medium in the cooling channel 8 is extended, thereby extending the heat exchange time and improving the sufficiency and uniformity of cooling. The baffle 18 blocks the port of the conical cover 19, and the cleaning ball 25 is located inside the conical cover 19. When the heat generation of the coil frame body 1 increases, the temperature of the cooling medium in the cooling channel 8 rises. When it flows into the collector ring 5, the thermal spring 13 deforms and curls due to heat, which in turn drives the rotating shaft 21 to rotate. The rotation of the rotating shaft 21 drives the worm gear 20 to rotate, which in turn adjusts the angle of the adjusting plate 11 in the output tube 6, thereby widening the flow gap in the output tube 6 and increasing the flow rate of the cooling medium. When the heat generation of the coil frame body 1 increases, the thermal spring... When the deformation and curling action adjustment plate 11 rotates to the horizontal position, the baffle 18 separates from the conical cover 19 under the action of the rotating shaft 21. Then, the cleaning ball 25 flows to the output pipe 6 and flows into the cooling channel 8 through the external cooling system via the diversion ring 2, thus cleaning the inner wall of the cooling channel 8 and preventing impurities from adhering to the inner wall of the cooling channel 8 from affecting the heat exchange efficiency. Then, the cleaning ball 25 flows into the collection cavity 15 and flows into the through hole 22 under the action of the medium flow and enters the conical cover 19 for the next use. Of course, the flowing cooling medium will also promote the rotation of the impeller 17. The rotation of the impeller 17 will drive the first toothed ring 23 to rotate. The rotation of the first toothed ring 23 will drive the second toothed ring 24 to rotate. The rotation of the second toothed ring 24 will cause the scraper 16 to rotate in the direction of the cooling medium flow. On the one hand, it will clean the filter plate 12 and prevent some impurities from blocking the filter holes on the filter plate 12. On the other hand, it can guide the cleaning ball 25 and prevent the cleaning ball 25 from remaining in the collection cavity 15.

[0046] Please see Figure 2 , Figure 4A flow divider 10 is provided inside the flow divider ring 2. The flow divider 10 divides the inner cavity of the flow divider ring 2 into multiple flow channels that are connected to each cooling channel 8. The flow divider 10 is used to divide the cooling medium and cleaning balls 25 that enter the flow divider ring 2 through the input pipe 4. The flow divider 10 connects the space divided in the flow divider ring 2 to the port of a group of cooling channels 8. The initial end of the flow divider 10 is set on one side of the input pipe 4 in the flow divider ring 2, while the other side of the input pipe 4 in the flow divider ring 2 is blocked. In this way, the cooling medium is divided in one direction in the flow divider ring 2, which avoids multiple cleaning balls 25 from flowing into a single cooling channel 8 when they rush into the flow divider ring 2, and prevents uneven flow distribution or blockage of the cooling channel 8 port.

Claims

1. A staged cooling nuclear fuel pump drive coil frame for nuclear power plants, comprising a coil frame body, wherein the inner ring sidewall of the coil frame body is provided with slots for coil winding; characterized in that, A flow divider ring is fixedly installed at the top of the coil frame body, and a flow collector ring is fixedly installed at the bottom of the coil frame body. A cooling channel is provided on the side wall of the coil frame body, and the flow divider ring, the cooling channel and the flow collector ring are connected in sequence to realize that the cooling medium is diverted from the flow divider ring into the cooling channel, dissipates heat on the coil frame body when flowing through the cooling channel, and finally converges in the flow collector ring. An input pipe is provided on one side of the flow divider ring, and an output pipe is provided on one side of the flow collector ring. An adjustment component is provided on the flow collector ring, and an adjustment plate is rotatably installed in the output pipe. The adjustment plate and the adjustment component are driven to rotate. The adjustment component drives the adjustment plate to rotate according to the temperature change of the cooling medium in the flow collector ring, thereby adjusting the flow gap and flow rate of the cooling medium in the output pipe. The adjustment assembly includes a heat-conducting box, which is disposed on the side wall of the collector ring and located on the side of the output pipe. One end of the heat-conducting box away from the output pipe extends into the collector ring. A rotating shaft is rotatably disposed in the center of the heat-conducting box. A thermal spring is sleeved around the rotating shaft. One end of the thermal spring is fixedly connected to the side wall of the rotating shaft, and the other end is fixedly connected to the inner wall of the heat-conducting box. A worm gear is fixedly installed at the end of the rotating shaft away from the heat conduction box. A worm wheel that meshes with the worm gear is installed above the rotating shaft. The end of the worm wheel away from the rotating shaft passes through the side wall of the output pipe and is fixedly connected to the adjustment plate.

2. The staged cooling nuclear fuel pump drive coil frame for nuclear power plants according to claim 1, characterized in that, A filter plate is provided inside the collector ring. The top of the filter plate is fixedly connected to the top of the inner wall of the collector ring. The filter plate has an "L" structure in cross-section. The space on the side of the filter plate inside the collector ring that is close to the output pipe is a separation chamber, and the space on the other side of the filter plate inside the collector ring is a collector chamber. The bottom of the cooling channel is connected to the collector chamber.

3. The nuclear power plant staged cooling nuclear fuel pump drive coil frame according to claim 1, characterized in that, The inner wall of the cooling channel is provided with heat-conducting protrusions, which are arranged in a ring array along the axis of the cooling channel.

4. The nuclear power plant staged cooling nuclear fuel pump drive coil frame according to claim 2, characterized in that, A cleaning ball is provided inside the collector ring, and a conical cover is provided on the side of the filter plate near the output pipe. The conical cover is located between the heat conduction box and the output pipe. The side wall of the filter plate is provided with a through hole for the cleaning ball to pass through, and the conical cover is provided with filter holes.

5. The nuclear power plant staged cooling nuclear fuel pump drive coil frame according to claim 4, characterized in that, A baffle is slidably attached to the end of the conical cover away from the heat conduction box. The baffle is slidably and sealed to the side wall of the collector ring. A connecting plate is fixedly provided at the end of the baffle away from the conical cover. The end of the connecting plate away from the baffle is sleeved on the outer periphery of the rotating shaft, and the connecting plate is threadedly connected to the rotating shaft.

6. The nuclear power plant staged cooling nuclear fuel pump drive coil frame according to claim 2, characterized in that, An impeller is rotatably mounted on the filter plate and positioned at the corresponding output pipe. A first toothed ring is located below the impeller and is fixedly connected to the impeller. A second toothed ring meshes with the outer periphery of the first toothed ring and is rotatably connected to the bottom of the filter plate. A scraper is fixedly mounted on the inner ring sidewall of the second toothed ring and slides against the inner ring sidewall of the filter plate.

7. The staged cooling nuclear fuel pump drive coil frame for nuclear power plants according to claim 1, characterized in that, A flow divider is installed inside the flow divider ring.

8. The staged cooling nuclear fuel pump drive coil frame for nuclear power plants according to claim 1, characterized in that, An arc-shaped guide plate is fixedly installed inside the collector ring to guide the cooling medium to flow directionally from the cooling channel outlet to the output pipe inlet.

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