Bridge device for pebble bed high temperature reactor

Abstract

The present invention relates to the field of reactor engineering technology, and provides a bridge device for a pebble bed high temperature reactor, wherein a shell is formed with a cylindrical cavity and a left ball-intake through hole, a right ball-intake through hole, a left ball-out through hole and a right ball-out through hole connected to the cavity; a runner is rotatably connected to the center of the cavity, the radius of the runner is smaller than the radius of the cavity, a boss is provided on the edge of the runner, and a through hole passing through the center of the runner is formed in the boss and the runner; and an inner liner fan ring is connected to the cavity wall of the cavity. Under normal working conditions, the cavity is separated by the runner, the boss and the inner liner fan ring to form a left ball-passing channel and a right ball-passing channel. Under special working conditions, the through hole can connect the spherical element in the left ball-intake through hole to the right ball-out through hole, and can also connect the spherical element in the right ball-intake through hole to the left ball-out through hole, so as to realize smooth ball passing of the cross pipeline, and through the swing and return of the runner, the ball passing control from one ball-intake to two ball-out can be realized, and the structure is compact and the control is flexible.

Description

Technical Field

[0001] The invention relates to the field of reactor engineering technology, in particular to a bridging device for a pebble bed high temperature reactor. Background Art

[0002] The pebble bed high temperature gas-cooled reactor uses its unique fuel loading and unloading system to achieve continuous fuel replacement without stopping the reactor. The fuel loading and unloading system of the commercial pebble bed high temperature reactor usually adopts multi-channel core circulation, multi-channel loading and multi-channel unloading. In the process of converging multiple channels, a set of bridging devices can be used to achieve multi-channel simultaneous operation or switching between multiple channels to meet the core circulation operation capacity requirements. In the related technology, a rotating structure is adopted. When the toggle member deflects and conducts any column of left inlet and right outlet, the ball will collide with the toggle member. The impact of continuous or large amounts of balls on the toggle member will cause wear on the equipment and spherical elements, and will also have an adverse effect on the drive mechanism; on the other hand, the box body adopts a two-chamber structure, which leads to an increase in the sealing surface of the equipment and an increase in volume, thereby increasing the equipment cost. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a bridge device for a pebble bed high temperature reactor, which can make the spherical element slide along the through hole to the left ball outlet through hole or the right ball outlet through hole when the rotating wheel swings, thereby reducing the collision between the spherical element and the internal components of the bridge device, reducing the wear of the equipment and the spherical element, and having a relatively compact structure.

[0004] A bridging device for a pebble bed high temperature reactor provided according to an embodiment of the present invention comprises:

[0005] The shell is formed with a cylindrical cavity and a left ball-intake through hole, a right ball-intake through hole, a left ball-outlet through hole and a right ball-outlet through hole connected to the cavity;

[0006] A rotating wheel is rotatably connected to the center of the cavity, the radius of the rotating wheel is smaller than the radius of the cavity, a boss is provided at the edge of the rotating wheel, and a through hole passing through the center of the rotating wheel is formed in the boss and the rotating wheel;

[0007] An inner lining sector ring is connected to the cavity wall of the cavity and is located between the left ball outlet through hole and the right ball outlet through hole. The inner lining sector ring is formed with an arc-shaped inner concave surface on the side facing the rotating wheel. The left side surface of the inner lining sector ring is used to guide the spherical element into the left ball outlet through hole, and the right side surface of the inner lining sector ring is used to guide the spherical element into the right ball outlet through hole.

[0008] A power assembly is transmission-connected to the rotating wheel.

[0009] According to one embodiment of the present invention, arc grooves are formed on the left and right sides of the liner sector ring.

[0010] According to an embodiment of the present invention, an arched doorway is formed on one side of the left ball outlet through hole and the right ball outlet through hole facing the cavity.

[0011] According to an embodiment of the present invention, the arc-shaped groove includes a transition slope surface, and the transition slope surface is transitionally connected to the bottom surface of the cavity.

[0012] According to one embodiment of the present invention, the left ball entry hole, the right ball exit hole, and the central axis of the right ball entry hole and the left ball exit hole all correspond to the center of the rotating wheel.

[0013] According to one embodiment of the present invention, an end shaft is provided on one side of the rotating wheel facing the bottom surface of the cavity, a first countersunk hole is formed on the bottom surface of the cavity, and the end shaft is connected to the first countersunk hole through a first bearing;

[0014] A rotating shaft is provided on a side of the rotating wheel away from the bottom surface of the cavity, and the rotating shaft is connected to the power assembly.

[0015] According to an embodiment of the present invention, a second countersunk hole is formed on the bottom surface of the cavity, and the rotating wheel is disposed in the second countersunk hole.

[0016] According to an embodiment of the present invention, an arc-shaped limiting groove is formed on one side of the rotating wheel facing the bottom surface of the cavity, and a limiting column is provided on the bottom surface of the cavity, and the limiting column is slidably connected to the limiting groove.

[0017] According to an embodiment of the present invention, a positioning hole is provided on the liner sector ring, and the positioning hole is connected to the bottom surface of the cavity through a positioning pin.

[0018] According to one embodiment of the present invention, the power assembly includes a transmission component and a drive motor, the transmission component includes a magnetic transmission and a coupling, the inner magnetic rotor of the magnetic transmission is connected to the rotating wheel, and the outer magnetic rotor of the magnetic transmission is connected to the output shaft of the drive motor through the coupling.

[0019] The above one or more technical solutions in the present invention have at least one of the following technical effects:

[0020] According to an embodiment of the present invention, a bridging device for a ball bed high-temperature reactor is provided, comprising a shell, a rotor, an inner liner fan ring and a power assembly; the shell is formed with a cylindrical cavity and a left ball inlet through hole, a right ball inlet through hole, a left ball outlet through hole and a right ball outlet through hole connected to the cavity; the rotor is rotatably connected to the center of the cavity, the radius of the rotor is smaller than the radius of the cavity, a boss is provided on the edge of the rotor, and a through hole passing through the center of the rotor is formed in the boss and the rotor; the inner liner fan ring is connected to the cavity wall of the cavity and is located between the left ball outlet through hole and the right ball outlet through hole, an arc-shaped concave surface is formed on the side of the inner liner fan ring facing the rotor, the left side surface of the inner liner fan ring is used to guide the spherical element into the left ball outlet through hole, and the right side surface of the inner liner fan ring is used to guide the spherical element into the right ball outlet through hole; the power assembly is transmission-connected to the rotor. Under normal operating conditions, the cavity is separated by the runner, boss and liner ring to form a left ball passage and a right ball passage. The left ball passage is connected to the left ball-in through-hole and the left ball-out through-hole, and the right ball passage is connected to the right ball-in through-hole and the right ball-out through-hole. Under special working conditions, the runner can rotate left and right, and the through-hole can connect the spherical element in the left ball-in through-hole to the right ball-out through-hole, or connect the spherical element in the right ball-in through-hole to the left ball-out through-hole, that is, the smooth ball passing of the cross-pipeline can be achieved, and the ball passing control from one ball-in to two ball-out can be achieved through the swing and return of the runner. The bridge device with this structure has a compact structure and flexible control. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic cross-sectional structural diagram of a bridging device for a pebble bed high temperature reactor provided by an embodiment of the present invention;

[0023] Figure 2 A schematic axial cross-sectional view of a bridging device for a pebble bed high temperature reactor provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of a three-dimensional structure of a rotor provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of the liner fan ring provided in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a three-dimensional structure of a dual-channel ball pass provided by an embodiment of the present invention;

[0027] Figure 6A schematic diagram of the three-dimensional structure of a housing provided in an embodiment of the present invention;

[0028] Figure 7 A schematic diagram of a bridging device for a pebble bed high temperature reactor provided by an embodiment of the present invention in a state of left-in and right-out crossing over balls;

[0029] Figure 8 A schematic diagram of a bridging device for a pebble bed high temperature reactor provided in an embodiment of the present invention in a state of entering from the left and exiting from the right and crossing the balls.

[0030] Reference numerals:

[0031] 1. Shell; 2. Rotor; 3. Liner ring; 4. Left ball inlet pipe; 5. Right ball inlet pipe; 6. Left ball outlet pipe; 7. Right ball outlet pipe; 8. Middle flange; 9. Power assembly; 10. Transmission component; 11. Coupling; 12. Drive motor; 13. Cavity; 14. Left ball inlet through hole; 15. Right ball inlet through hole; 16. Left ball outlet through hole; 17. Right ball outlet through hole; 18. Limiting column; 19. Rotor; 20. Boss; 21. End shaft; 22. Limiting groove; 23. Rotating shaft; 24. Through hole; 25. Inner concave surface; 26. Outer convex surface; 27. Positioning hole; 28. Left arc-shaped groove; 29. ​​Right arc-shaped groove; 30. Left ball passage; 31. Right ball passage; 32. Left door hole; 33. Right door hole; 34. Bottom surface; 35. Cylinder; 36. First countersunk hole; 37. First bearing; 38. Second bearing; 39. Left slope surface; 40. Right slope surface; 41. Second countersunk hole; 42. Axial hole; 43. Bearing seat; 44. Magnetic actuator; 45a. First spherical element; 45b. Second spherical element. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the invention clearer, the technical solution in the invention will be clearly described below in conjunction with the drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Based on the embodiments in the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0033] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0037] In the related art, a tongue plate rotating structure is adopted. When the tongue plate deflects and conducts any column of left-in and right-out, the ball will collide with the tongue plate. The impact of continuous or large-scale passing of the ball on the tongue plate will cause wear of the equipment and the spherical element, and further have an adverse effect on the driving mechanism. On the other hand, the box body adopts a two-chamber structure of a buffer chamber and a guide chamber, which leads to an increase in the sealing surface of the equipment and an increase in the volume, thereby increasing the equipment cost.

[0038] According to the embodiment of the present invention, the bridging device for the pebble bed high temperature reactor is provided. Figures 1 to 8 , including a shell 1, a runner 19, a liner fan ring 3 and a power assembly 9.

[0039] The shell 1 forms a cylindrical cavity 13, and the shell 1 also forms a left ball entry hole 14, a right ball entry hole 15, a left ball outlet hole 16 and a right ball outlet hole 17 connected to the cavity 13. The left ball entry hole 14 and the right ball entry hole 15 are located above the left and right sides of the cavity 13, and the left ball outlet hole 16 and the right ball outlet hole 17 are located below the left and right sides of the cavity 13, and are symmetrically arranged in pairs.

[0040] The rotating wheel 19 is disposed in the cavity 13 and rotatably connected to the center of the cavity 13 . The radius of the rotating wheel 19 is smaller than the radius of the cavity 13 , and the interval between the two allows the spherical element to pass through.

[0041] A boss 20 is formed on the edge of the rotating wheel 19 , and a through hole 24 is formed in the boss 20 and the rotating wheel 19 . The through hole 24 passes through the center of the rotating wheel 19 , that is, penetrates the rotating wheel 19 along the diameter direction.

[0042] The liner sector ring 3 is connected to the cavity wall of the cavity 13 and is located between the left ball outlet hole 16 and the right ball outlet hole 17. The liner sector ring 3 has an arc-shaped inner concave surface 25 on the side facing the rotating wheel 19 and an arc-shaped outer convex surface 26 on the side facing away from the rotating wheel 19. The inner concave surface 25 is adapted to the edge of the rotating wheel 19, and the outer convex surface 26 is adapted to the side wall of the cavity 13.

[0043] The left side surface of the liner sector ring 3 is used to guide the spherical element into the left ball outlet through hole 16 , and the right side surface of the liner sector ring 3 is used to guide the spherical element into the right ball outlet through hole 17 .

[0044] The power assembly 9 is connected to the rotating wheel 19 by transmission. The power assembly 9 can make the rotating wheel 19 and the boss 20 be centered, rotated to the left or rotated to the right by switching the position. Figure 1 , Figure 7 and Figure 8 .

[0045] like Figure 1 and Figure 2As shown, the bridge device also includes a left ball-intake pipe 4, a right ball-intake pipe 5, a left ball-outtake pipe 6, a right ball-outtake pipe 7 and a middle flange 8. The housing 1 is provided with a cylindrical cavity 13, the left ball-intake pipe 4 is connected to the left ball-intake through hole 14, the right ball-intake pipe 5 is connected to the right ball-intake through hole 15, the left ball-outtake pipe 6 is connected to the left ball-outtake through hole 16, the right ball-outtake pipe 7 is connected to the right ball-outtake through hole 17, and the ball-intake pipe and the ball-outtake through hole are coaxially and equidiametrically arranged, and the ball-outtake pipe and the ball-outtake through hole are coaxially and equidiametrically arranged.

[0046] The middle flange 8 is connected to the housing 1 by a set of fasteners and seals, such as Figure 2 As shown, the middle flange 8 is provided with an axial hole 42. The runner 19 and the boss 20 are part of the rotor 2, and the rotor 2 also includes a rotating shaft 23, a bearing seat 43, an end shaft 21, and the like.

[0047] It is understandable that the power assembly 9 can make the rotating wheel 19 and the boss 20 center, rotate left or right by position switching, thereby adjusting the distribution of the spherical elements in the left ball outlet hole 16 and the right ball outlet hole 17.

[0048] When the wheel 19 and the boss 20 are centered, please refer to Figure 1 The runner 19, the boss 20 and the liner ring 3 together divide the cavity 13 of the shell 1 into two left and right chambers, and together with the bottom surface of the middle flange 8 form a left ball passage 30 and a right ball passage 31.

[0049] like Figure 1 and Figure 5 As shown, the left ball pipe 4, the left ball hole 14, the left ball passage 30, the left ball outlet hole 16 and the left ball outlet pipe 6 form a complete left ball passage, and the right ball pipe 5, the right ball hole 15, the right ball passage 31, the right ball outlet hole 17 and the right ball outlet pipe 7 form a complete right ball passage. Under normal operating conditions of the bridge device, the through hole 24 of the rotor 2 is in the center position, and the left and right ball passages can realize smooth ball passage in two ways. The curved and turned left ball passage 30 and right ball passage 31 have a certain mechanical buffering effect on the incoming ball. After the first spherical element 45a and / or the second spherical element 45b collides and buffers with the rotating wheel 19 at the entrance of the ball passage, it goes down along the left ball passage 30 and the right ball passage 31, and collides and buffers with the liner fan ring 3 for the second time at the tail end of the passage. Through two mechanical buffers, the ball passing speed can be slowed down, and then the ball enters the left ball outlet hole 16 and the right ball outlet hole 17 respectively under the guidance of the left and right sides of the liner fan ring 3.

[0050] According to the bridge device for the ball bed high temperature reactor provided by the embodiment of the present invention, under normal operating conditions, the cavity 13 is divided by the wheel 19, the boss 20 and the liner fan ring 3 to form a left ball passage 30 and a right ball passage 31. The left ball passage 30 is connected to the left ball through hole 14 and the left ball outlet through hole 16, and the right ball passage 31 is connected to the right ball through hole 15 and the right ball outlet through hole 17. Under special working conditions, the wheel 19 can rotate left and right, and the through hole 24 can connect the spherical element in the left ball through hole 14 to the right ball outlet through hole 17, and can also connect the spherical element in the right ball through hole 15 to the left ball outlet through hole 16, that is, the smooth ball passing of the cross pipeline can be realized, and the ball passing control from one way of ball entering to two ways of ball exiting can be realized by the swing and return of the wheel. The bridge device using this structure has a compact structure and flexible control.

[0051] like Figure 7 and Figure 8 As shown, when necessary, the rotor 2 rotates to connect the through hole 24 to the left ball-in through hole 14 of the shell 1 and the right ball-out through hole 17 of the shell 1, so that the ball can pass smoothly from left to right. If the rotor 2 is rotated to switch back and forth between the left-in-left-out and left-in-right-out modes, the function of conveying spherical elements from the left to the two downstream outlet pipes can be realized. On the other hand, when the rotating rotor 2 connects the right ball-in through hole 15 of the shell and the left ball-out through hole 16 of the shell 1, the ball can pass smoothly from right to left; similarly, if the rotor 2 is rotated to switch back and forth between the right-in-right-out and right-in-left-out modes, the function of conveying spherical elements from the right to the two downstream outlet pipes can be realized.

[0052] In some embodiments, arc-shaped grooves are formed on the left and right sides of the liner sector ring 3 , namely a left arc-shaped groove 28 and a right arc-shaped groove 29 .

[0053] It can be understood that the size of the arc groove is adapted to the diameter of the spherical element, and after the spherical element contacts the liner sector ring 3, it can smoothly roll toward the left ball outlet hole 16 and the right ball outlet hole 17.

[0054] In some embodiments, the left ball outlet hole 16 and the right ball outlet hole 17 are formed with arched door holes on the side facing the cavity 13, namely, the left door hole 32 and the right door hole 33. After the spherical element passes through the two mechanical buffers of the rotating wheel 19 and the liner fan ring 3 in the ball channel, it may still have a certain speed. The left door hole 32 is provided at the inlet end of the left ball outlet hole 16, and the right door hole 33 is provided at the inlet end of the right ball outlet hole 17. The arched door holes can more quickly and effectively guide the spherical element into the ball outlet hole of the housing 1, and prevent the spherical element from bouncing back and forth in the channel, affecting the subsequent ball passing.

[0055] In some embodiments, the arc-shaped groove of the liner sector ring 3 includes transition slopes, namely a left slope 39 and a right slope 40 , and the transition slopes are transitionally connected to the bottom surface 34 of the cavity 13 .

[0056] After the liner ring 3 is assembled in the housing 1, the left arc groove 28 and the right arc groove 29 are smoothly transitioned to the bottom surface 34 of the cavity 13 through the left slope 39 and the right slope 40 respectively. Through the flow guidance of the left slope 39 and / or the right slope 40, the first spherical element 45a and / or the second spherical element 45b flow in the left ball passage 30 and / or the right ball passage 31, and when the ball speed is low, they can smoothly enter the left arc groove 28 and the right arc groove 29 of the liner ring 3, and then enter the left ball outlet through hole 16 and / or the right ball outlet through hole 17 along the arc groove. If the ball speed is high, it can be introduced into the left door hole 32 or the right door hole 33 through the left slope 39 and / or the right slope 40, and then flow out of the left ball outlet pipe 6 and / or the right ball outlet pipe 7.

[0057] In some embodiments, the central axes of the left ball-scoring through hole 14 , the right ball-scoring through hole 15 , the left ball-discharging through hole 16 , and the right ball-discharging through hole 17 all correspond to the center of the rotating wheel 19 .

[0058] It can be understood that the through hole 24 is a straight hole that passes through the center of the rotating wheel 19 and the center of the boss 20. When the rotating wheel 19 rotates, the left ball-input through hole 14 can be connected to the right ball-output through hole 17, or the right ball-output through hole 15 can be connected to the left ball-output through hole 16.

[0059] When the central axes of the left goal hole 14, the right goal hole 15, the left ball outlet hole 16 and the right ball outlet hole 17 all correspond to the center of the rotating wheel 19, please refer to Figure 7 The left ball-passing hole 14, the hole 24 and the right ball-passing hole 17 form a straight ball-passing passage, see Figure 8 The right ball inlet through hole 15, through hole 24 and the left ball outlet through hole 16 form a straight ball passage. When the spherical element rolls in the cross pipe, it reduces the collision with the internal structure of the bridge device, reduces the possibility of structural wear and rupture of the spherical element.

[0060] It should be noted that when the central axes of the left goal hole 14, the right goal hole 15, the left ball outlet hole 16 and the right ball outlet hole 17 all correspond to the center of the rotating wheel 19, the left arc groove 28 and the right arc groove 29 are transitionally connected to the through hole 24 and the ball outlet hole, and the inclination angle of the arc groove is the same as the inclination angle of the ball outlet hole.

[0061] According to the bridging device for a pebble bed high temperature reactor provided by an embodiment of the present invention, the cavity 13 includes a bottom surface 34 and a cylindrical surface 35, and the middle flange 8 is arranged opposite to the bottom surface 34 of the cavity 13, and the rotating wheel 19 and the like are placed therebetween.

[0062] The end shaft 21 is formed on the side of the rotating wheel 19 facing the bottom surface 34, and the rotating shaft 23 is formed on the side of the rotating wheel 19 away from the bottom surface 34. The bottom surface 34 of the cavity 13 is formed with a first countersunk hole 36, and the end shaft 21 is rotatably connected to the first countersunk hole 36 through a first bearing 37. The rotating shaft 23 is connected to the power assembly 9, and the power assembly 9 can accurately control the rotation angle of the rotating wheel 19.

[0063] A second counterbore 41 is further formed on the bottom surface 34 of the cavity 13 . The second counterbore 41 is coaxially disposed with the first counterbore 36 , and the rotating wheel 19 is disposed in the second counterbore 41 .

[0064] An axial hole 42 is formed on the middle flange 8 , and a bearing seat 43 is formed on the inner side wall of the axial hole 42 . The second bearing 38 is installed on the bearing seat 43 , and the second bearing 38 is connected to the rotating shaft 23 .

[0065] It can be understood that the first bearing 37, the second bearing 38 and the second counterbore 41 can increase the stability of the rotor 2, reduce the misalignment during the operation of the bridge device, and reduce the wear of the structure.

[0066] According to the bridge device for a pebble bed high temperature reactor provided by an embodiment of the present invention, an arc-shaped limiting groove 22 is formed on the side of the rotating wheel 19 facing the cavity 13, see Figure 3 The bottom surface 34 of the cavity 13 is provided with a limiting column 18, see Figure 1 to Figure 2 The limiting column 18 is slidably connected to the limiting groove 22 .

[0067] It is understandable that the length of the limit slot 22 is limited, the position of the limit post 18 is fixed, and when the rotating wheel 19 rotates, the limit post 18 slides in the limit slot 22. When the rotating wheel 19 rotates to the point where the through hole 24 corresponds to the left goal through hole 14, the limit post 18 abuts against the left edge of the limit slot 22. When the rotating wheel 19 rotates to the point where the through hole 24 corresponds to the right goal through hole 15, the limit post 18 abuts against the right edge of the limit slot 22. The limit post 18 and the limit slot 22 can improve the docking accuracy between the through hole 24 and the goal through hole, and avoid position deviation of the power assembly 9 after long-term use. The accurate alignment of the left-in-right-out and right-in-left-out channels can be guaranteed to ensure the reliability of the cross-passing of the ball.

[0068] In some embodiments, a positioning hole 27 is provided on the liner fan ring 3, and the positioning hole 27 is connected to the bottom surface 34 of the cavity 13 through a positioning pin or a positioning plug. The positioning hole 27 and the positioning pin improve the position stability of the liner fan ring 3, and are conducive to the disassembly and assembly of the liner fan ring 3, and are more convenient for production and maintenance.

[0069] In some embodiments, the power assembly 9 includes a transmission component 10 and a drive motor 12, the transmission component 10 includes a magnetic transmission 44 and a coupling 11, the magnetic transmission 44 includes an inner magnetic rotor and an outer magnetic rotor, the inner magnetic rotor is connected to the rotating shaft 23 of the wheel 19, and the outer magnetic rotor is connected to the output shaft of the drive motor 12 through a coupling.

[0070] An isolation cover is arranged between the inner magnetic rotor and the outer magnetic rotor of the magnetic transmission device 44. The isolation cover, the middle flange 8 and the shell 1, as well as the fasteners and seals connected therebetween, together form a complete pressure-bearing boundary, thereby realizing the bridging function under pressure conditions and ensuring the sealing of the pressure-bearing parts. Through the isolation function of the isolation cover, the connection between the inner magnetic rotor and the rotating shaft 23, and the connection between the outer magnetic rotor and the coupling 11, based on the magnetic push-pull effect of the outer magnetic rotor on the inner magnetic rotor, the power of the drive motor 12 is transmitted to the rotor 2 through non-contact transmission, thereby realizing fully sealed transmission in the sealed space.

[0071] In summary, the bridge device for a high-temperature pebble bed reactor provided according to an embodiment of the present invention comprises a shell 1, a runner 19, a liner fan ring 3 and a power assembly 9; the shell 1 is formed with a cylindrical cavity 13 and a left ball-injection through hole 14, a right ball-injection through hole 15, a left ball-outlet through hole 16 and a right ball-outlet through hole 17 connected to the cavity 13; the runner 19 is rotatably connected to the center of the cavity 13, the radius of the runner 19 is smaller than the radius of the cavity 13, and the edge of the runner 19 is provided with a boss 20, the boss 20 is provided with a protrusion 21, and the protrusion 21 is provided with a protrusion 22. A through hole 24 passing through the center of the rotating wheel 19 is formed in the platform 20 and the rotating wheel 19; the lining sector ring 3 is connected to the cavity wall of the cavity 13 and is located between the left ball outlet hole 16 and the right ball outlet hole 17. The lining sector ring 3 is formed with an arc-shaped inner concave surface 25 on the side facing the rotating wheel 19. The left side surface of the lining sector ring 3 is used to guide the spherical element into the left ball outlet hole 16, and the right side surface of the lining sector ring 3 is used to guide the spherical element into the right ball outlet hole 17; the power assembly 9 is connected to the rotating wheel 19 in a transmission manner. Under normal operating conditions, the cavity 13 is divided into a left ball passage 30 and a right ball passage 31 by the rotating wheel 19, the boss 20 and the lining sector ring 3. The left ball passage 30 is connected to the left ball through hole 14 and the left ball outlet through hole 16, and the right ball passage 31 is connected to the right ball through hole 15 and the right ball outlet through hole 17. Under special working conditions, the wheel 19 can rotate left and right, and the through hole 24 can connect the spherical element in the left ball-intake through hole 14 to the right ball-outtake through hole 17, and can also connect the spherical element in the right ball-intake through hole 15 to the left ball-outtake through hole 16, that is, the smooth ball passing of the cross-pipe can be realized, and the ball passing control from one-way ball-intake to two-way ball-outtake can be realized through the swing and return of the wheel. The bridge device with this structure has a compact structure and flexible control.

[0072] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bridging device for a pebble bed high temperature reactor, characterized in that: include: The shell is formed with a cylindrical cavity and a left ball-intake through hole, a right ball-intake through hole, a left ball-outlet through hole and a right ball-outlet through hole connected to the cavity; A rotating wheel is rotatably connected to the center of the cavity, the radius of the rotating wheel is smaller than the radius of the cavity, a boss is provided at the edge of the rotating wheel, and a through hole passing through the center of the rotating wheel is formed in the boss and the rotating wheel; An inner lining sector ring is connected to the cavity wall of the cavity and is located between the left ball outlet through hole and the right ball outlet through hole. The inner lining sector ring is formed with an arc-shaped inner concave surface on the side facing the rotating wheel. The left side surface of the inner lining sector ring is used to guide the spherical element into the left ball outlet through hole, and the right side surface of the inner lining sector ring is used to guide the spherical element into the right ball outlet through hole. A power assembly is transmission-connected to the rotating wheel.

2. The bridging device for a pebble bed high temperature reactor according to claim 1, characterized in that: The left side and the right side of the liner sector ring are both formed with arc grooves.

3. The bridging device for a pebble bed high temperature reactor according to claim 2, characterized in that: An arched doorway is formed on one side of the left ball outlet through hole and the right ball outlet through hole facing the cavity.

4. The bridging device for a pebble bed high temperature reactor according to claim 3, characterized in that: The arc-shaped groove includes a transition slope surface, and the transition slope surface is transitionally connected to the bottom surface of the cavity.

5. The bridging device for a pebble bed high temperature reactor according to claim 1, characterized in that: The left ball-injection through hole, the right ball-outlet through hole, and the central axis of the right ball-injection through hole and the left ball-outlet through hole all correspond to the center of the rotating wheel.

6. The bridging device for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: An end shaft is provided on one side of the rotating wheel facing the bottom surface of the cavity, a first countersunk hole is formed on the bottom surface of the cavity, and the end shaft is connected to the first countersunk hole through a first bearing; A rotating shaft is provided on a side of the rotating wheel away from the bottom surface of the cavity, and the rotating shaft is connected to the power assembly.

7. The bridging device for a pebble bed high temperature reactor according to claim 6, characterized in that: A second countersunk hole is formed on the bottom surface of the cavity, and the rotating wheel is arranged in the second countersunk hole.

8. The bridging device for a pebble bed high temperature reactor according to claim 6, characterized in that: An arc-shaped limiting groove is formed on one side of the bottom surface of the rotating wheel facing the cavity, and a limiting column is provided on the bottom surface of the cavity, and the limiting column is slidably connected to the limiting groove.

9. The bridging device for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: The liner sector ring is provided with a positioning hole, and the positioning hole is connected to the bottom surface of the cavity through a positioning pin.

10. The bridging device for a pebble bed high temperature reactor according to any one of claims 1 to 5, characterized in that: The power assembly includes a transmission component and a drive motor. The transmission component includes a magnetic transmission and a coupling. The inner magnetic rotor of the magnetic transmission is connected to the rotating wheel. The outer magnetic rotor of the magnetic transmission is connected to the output shaft of the drive motor through the coupling.

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