Rotary guiding device for sodium-cooled fast reactor assembly

Abstract

The invention belongs to the technical field of sodium-cooled fast reactor loading and reloading, and particularly relates to a rotary guiding device for a sodium-cooled fast reactor assembly. Comprising a device body, a flange is connected to the lower portion of the device body, a through hole is formed in the middle of the flange, a conversion barrel sealing support is connected to the flange, a guide pipe penetrates through the through hole of the flange, and an assembly guide rail is arranged on the inner wall of the guide pipe; the upper portion of the guide pipe is connected with a clamping mechanism through a second bolt and a second gasket, and the clamping mechanism is connected with a guide mechanism. The device has the beneficial effects that compared with a fixed guide device, the device can actively control the direction of the assembly, and for a regular polygon assembly, the fixed guide device can only enter at a random angle, and the device can enter at any specified angle. The problem of material changing of the control rod outer sleeve assembly is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of sodium-cooled fast reactor charging and replacement, and in particular relates to a rotary guide device for a sodium-cooled fast reactor assembly. Background Art

[0002] During the process of loading a large number of components into a sodium-cooled fast reactor, the control rod outer sleeve assembly needs to be placed into the new component conversion barrel socket at a certain angle. In order to ensure that the outer sleeve assembly enters the new component conversion barrel socket at the specified angle, a component rotation guide device needs to be designed. Summary of the invention

[0003] The purpose of the present invention is to provide a sodium-cooled fast reactor assembly rotation guide device, which constrains the rotation direction of the outer sleeve assembly and rotates it to a specified angle before the outer sleeve assembly enters the new assembly conversion barrel, so that the outer sleeve assembly can enter the new assembly conversion barrel at the specified angle.

[0004] The technical solution of the present invention is as follows: a sodium-cooled fast reactor assembly rotation guide device, comprising an apparatus body, a flange connected to the lower part of the apparatus body, a through hole in the middle of the flange, a conversion barrel sealing support connected to the flange, a guide tube passing through the through hole of the flange, an assembly guide rail arranged on the inner wall of the guide tube, a rotating mechanism connected to the flange located at the lower part of the apparatus body outside the guide tube, a clamping mechanism connected to the upper part of the guide tube through a second bolt and a second gasket, and a guiding mechanism connected to the clamping mechanism.

[0005] The guide mechanism includes a guide rail lower floor, the upper part of the guide rail lower floor is fixedly connected to a guide cylinder by bolts, the upper part of the guide cylinder is fixedly connected to a guide upper cover plate by bolts, the upper part of the guide upper cover plate is connected to a universal ball mechanism, a slewing bearing is connected to the middle position of the upper part of the guide rail lower floor, a guide rotating plate is fixed to the outer side of the slewing bearing, a bearing seat is installed on one side of the lower part of the guide rail lower floor, a reducer is connected to the lower part of the bearing seat, the reducer is connected to a motor, a guide shaft is arranged in the bearing seat, the guide shaft passes through the guide rail lower floor, and the upper part of the guide shaft is connected to a gear.

[0006] The guide rotating plate is connected with a universal ball mechanism.

[0007] The universal ball mechanism includes a universal ball, which is sleeved in a guide block. The universal ball has a protruding shaft, on which a truncated cone spiral spring is sleeved. The guide block is clamped outside an adjusting ring, and an extension rod is connected inside the adjusting ring. The extension rod has a blind hole, and the protruding shaft of the universal ball can be inserted into the blind hole of the extension rod. A blind hole is opened at the bottom of the guide block, and one end of the guide pin is inserted into the blind hole of the guide block, and the other end is inserted into the groove on the guide rotating plate.

[0008] The device body is a cylindrical structure.

[0009] The upper part of the device body is connected with a flange, the middle of the flange has a through hole, the flange is connected with a transition bin through a first bolt and a first gasket, and a transition bin sealing gasket is arranged between the transition bin and the flange.

[0010] A sealing gasket is arranged at the connection between the flange and the lower part of the device body.

[0011] There are three component guide rails evenly arranged on the inner wall of the guide tube.

[0012] The component guide rail is connected to the inner wall of the guide tube by bolts.

[0013] The side wall of the guide tube is provided with a peep window.

[0014] The beneficial effect of the present invention is that compared with a fixed guide device, the present device can actively control the direction of the component. For a regular polygonal component, a fixed guide device can only enter at a random angle, while the present device can enter at any specified angle. The problem of refueling the control rod outer sleeve component is solved. The device has been used in a sodium-cooled demonstration fast reactor, and it can be seen from use that it can achieve the purpose. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a rotary guide device for a sodium-cooled fast reactor assembly provided by the present invention;

[0016] Figure 2 for Figure 1 A cross-sectional view of

[0017] Figure 3 for Figure 1 Enlarged schematic diagram of part Ⅰ in the middle;

[0018] Figure 4 Schematic diagram of the guiding mechanism;

[0019] Figure 5 for Figure 4 A partial enlarged view of the

[0020] Figure 6 A schematic diagram of a guide rotating plate;

[0021] Figure 7 A top view of the guide mechanism.

[0022] In the figure: 1 first bolt, 2 first gasket, 3 transition chamber sealing gasket, 4 guide mechanism, 5 second bolt, 6 second gasket, 7 guide tube, 8 assembly guide rail, 9 peep window, 10 device body, 11 rotating mechanism, 12 sealing gasket, 13 conversion barrel sealing support, 14 guide upper sealing plate, 15 guide cylinder, 16 guide rail lower floor, 17 slewing bearing, 18 guide rotating plate, 19 motor, 20 reducer, 21 bearing seat, 22 guide shaft, 23 gear, 24 universal ball, 25 guide block, 26 truncated cone spiral spring, 27 extension rod, 28 adjustment ring, 29 guide pin, 30 rotating motor, 31 rotating reducer, 32 motor bracket, 33 driving gear, 34 driving shaft, 35 end cover, 36 bearing. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] The present invention provides a sodium-cooled fast reactor assembly rotation guide device, the entire rotation guide device is installed on the inlet channel of the new assembly conversion barrel. When in use, the assembly enters from the top of the guide device, smoothly enters the guide tube under the action of the universal ball of the guide mechanism, descends along the guide tube, observes the mark on the assembly from the peep window, drives the rotation mechanism to drive the assembly to rotate to the specified position, and then the guide mechanism remains stationary, and the assembly continues to descend to the socket of the new assembly conversion barrel below.

[0025] like Figure 1 and 2 As shown, a sodium-cooled fast reactor assembly rotation guide device comprises an apparatus body 10, the apparatus body 10 is a cylindrical structure, a flange is connected to the upper part of the apparatus body 10, a through hole is provided in the middle of the flange, the flange is connected to a transition chamber through a first bolt 1 and a first gasket 2, and a transition chamber sealing gasket 3 is provided between the transition chamber and the flange; a flange is connected to the lower part of the apparatus body 10, a sealing gasket 12 is provided at the connection between the flange and the lower part of the apparatus body 10, a through hole is provided in the middle of the flange, a conversion barrel sealing support 13 is connected to the flange, a guide tube 7 passes through the through hole of the flange, an assembly guide rail 8 is provided on the inner wall of the guide tube 7, and there are 3 assembly guide rails 8 evenly arranged on the inner wall of the guide tube 7, and the assembly guide rail 8 is connected to the inner wall of the guide tube 7 by bolts; a peep window 9 is opened on the side wall of the guide tube 7, a rotating mechanism 11 is connected to the flange of the outer part of the guide tube 7 located at the lower part of the apparatus body 10, the upper part of the guide tube 7 is connected to a clamping mechanism through a second bolt 5 and a second gasket 6, and the clamping mechanism is connected to a guide mechanism 4.

[0026] like Figure 3As shown, the rotating mechanism 11 is driven by a driving device, which includes a rotating motor 30, which is connected to a rotating reducer 31 through a rotating shaft. The rotating reducer 31 is installed on a motor bracket 32. The rotating reducer 31 drives a driving gear 33 to rotate through a driving shaft 34, and the driving gear 33 drives the rotating mechanism 11 to rotate. The rotating mechanism 11 is connected to the guide mechanism 4 to drive the component to rotate.

[0027] like Figure 4 As shown, the guide mechanism 4 includes a guide rail lower floor 16, the upper part of the guide rail lower floor 16 is fixedly connected to a guide cylinder 15 by bolts, the upper part of the guide cylinder 15 is fixedly connected to a guide upper sealing plate 14 by bolts, the guide upper sealing plate 14 is connected to a universal ball mechanism, the middle position of the upper part of the guide rail lower floor 16 is connected to a slewing bearing 17, and a guide rotating plate 18 is fixed to the outer side of the slewing bearing 17, as shown in FIG. Figure 6 As shown, the guide rotating plate 18 is a disc-shaped structure, with multiple bolt holes on the edge, a round hole in the middle, and three grooves between the round hole and the edge. A bearing seat 21 is installed on one side of the lower part of the guide rail lower floor 16, and a reducer 20 is connected to the lower part of the bearing seat 21. The reducer 20 is connected to the motor 19. A guide shaft 22 is arranged in the bearing seat 21, and the guide shaft 22 passes through the guide rail lower floor 16. The upper part of the guide shaft 22 is connected to a gear 23. The gear 23 drives the guide tube 7 to rotate around the central axis.

[0028] like Figure 5 As shown, the universal ball mechanism includes a universal ball 24, which is sleeved in a guide block 25. The universal ball 24 has a protruding shaft, on which a truncated cone spiral spring 26 is sleeved. The guide block 25 is clamped outside an adjustment ring 28, and an extension rod 27 is connected inside the adjustment ring 28. The extension rod 27 has a blind hole, and the protruding shaft of the universal ball 24 can be inserted into the blind hole of the extension rod 27. The lower part of the guide block 25 has a blind hole, and one end of the guide pin 29 is inserted into the blind hole of the guide block 25, and the other end is inserted into the groove on the guide rotating plate 18. The universal ball 24 can clamp the assembly.

[0029] The guide tube 7 keeps the assembly from rotating freely and descends at a fixed angle. The rotating mechanism 11 drives the guide tube to drive the assembly to rotate to a specified angle. The peep window 9 is used to observe the angle of the assembly entering the guide tube and the mark on the assembly. The device body 10 is used to maintain the internal sealing condition and play an overall supporting role. The conversion barrel sealing support 13 establishes a connection with the inlet of the new component conversion barrel and maintains the seal.

[0030] The working process of the present invention is as follows:

[0031] Step 1: Connect the rotary guide device to the inlet channel flange of the new component conversion barrel and ensure its sealing;

[0032] Step 2: Turn the rotating mechanism to align the guide tube with the socket of the new component conversion barrel;

[0033] Step 3: When the outer sleeve assembly enters the guide mechanism, adjust the distance between the universal balls of the guide mechanism (the distance from the universal ball to the center of the channel is equal to the shortest distance from the center of the outer sleeve to the edge) so that the outer sleeve can enter at a predetermined position;

[0034] Step 4: When the mark of the outer sleeve assembly reaches the peep window, drive the rotating device to rotate, observe the surface where the mark is located, and rotate the surface with the mark to the set angle;

[0035] Step 5: Drive the outer sleeve assembly down and release it into the socket of the new assembly conversion barrel;

[0036] Step 6: After release, proceed to install the next component.

Claims

1. A sodium-cooled fast reactor assembly rotary guide device, characterized in that: It includes a device body, a flange is connected to the lower part of the device body, a through hole is provided in the middle of the flange, a conversion barrel sealing support is connected to the flange, a guide tube passes through the through hole of the flange, an assembly guide rail is arranged on the inner wall of the guide tube, a rotating mechanism is connected to the flange located at the lower part of the device body outside the guide tube, the upper part of the guide tube is connected to a clamping mechanism through a second bolt and a second gasket, and the clamping mechanism is connected to the guiding mechanism.

2. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: The guide mechanism includes a guide rail lower floor, the upper part of the guide rail lower floor is fixedly connected to a guide cylinder by bolts, the upper part of the guide cylinder is fixedly connected to a guide upper cover plate by bolts, the upper part of the guide upper cover plate is connected to a universal ball mechanism, a slewing bearing is connected to the middle position of the upper part of the guide rail lower floor, a guide rotating plate is fixed to the outer side of the slewing bearing, a bearing seat is installed on one side of the lower part of the guide rail lower floor, a reducer is connected to the lower part of the bearing seat, the reducer is connected to a motor, a guide shaft is arranged in the bearing seat, the guide shaft passes through the guide rail lower floor, and the upper part of the guide shaft is connected to a gear.

3. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: The guide rotating plate is connected with a universal ball mechanism.

4. A sodium-cooled fast reactor assembly rotary guide device as claimed in claim 3, characterized in that: The universal ball mechanism includes a universal ball, which is sleeved in a guide block. The universal ball has a protruding shaft, on which a truncated cone spiral spring is sleeved. The guide block is clamped outside an adjusting ring, and an extension rod is connected inside the adjusting ring. The extension rod has a blind hole, and the protruding shaft of the universal ball can be inserted into the blind hole of the extension rod. A blind hole is opened at the bottom of the guide block, and one end of the guide pin is inserted into the blind hole of the guide block, and the other end is inserted into the groove on the guide rotating plate.

5. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: The device body is a cylindrical structure.

6. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: The upper part of the device body is connected with a flange, the middle of the flange has a through hole, the flange is connected with a transition bin through a first bolt and a first gasket, and a transition bin sealing gasket is arranged between the transition bin and the flange.

7. A sodium-cooled fast reactor assembly rotary guide device according to claim 6, characterized in that: A sealing gasket is arranged at the connection between the flange and the lower part of the device body.

8. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: There are three component guide rails evenly arranged on the inner wall of the guide tube.

9. A sodium-cooled fast reactor assembly rotary guide device according to claim 8, characterized in that: The component guide rail is connected to the inner wall of the guide tube by bolts.

10. A sodium-cooled fast reactor assembly rotary guide device according to claim 1, characterized in that: The side wall of the guide tube is provided with a peep window.

Images