High-temperature gas-cooled reactor choke device

Abstract

The present invention relates to the field of reactor engineering technology, and provides a high-temperature gas-cooled reactor choke device, comprising: a base body and a rotor, wherein the base body is provided with a chamber inside, and a portion of the rotor is rotatably disposed in the chamber; the base body is provided with a feed channel and a discharge channel connected to the chamber, and the feed channel and the discharge channel are distributed along the circumference of the rotor; the outer wall of the rotor blocks the feed channel and the discharge channel, and the surface of the rotor is provided with a receiving cup for docking with any one of the feed channel and the discharge channel, the inner wall of the receiving cup is provided with a through-going connecting hole, and the base body is provided with an airflow channel that is through-going and connected to the connecting hole. The high-temperature gas-cooled reactor choke device can perform forward and reverse bidirectional purges on the feed channel, the discharge channel, and the receiving cup, so that dust and debris in the feed channel, the discharge channel, and the receiving cup are discharged, thereby solving the problem that dust and debris are easily accumulated in the receiving cup, causing the surface of the material to exceed the surface of the rotor, resulting in rotor jamming.

Description

Technical Field

[0001] The present invention relates to the field of reactor engineering technology, and in particular to a choke device for a high-temperature gas-cooled reactor. Background Art

[0002] The pebble-bed high-temperature gas-cooled reactor (HTGR) offers the advantage of continuous fuel refueling without stopping the reactor. Its fully automated fuel loading and unloading system is key to ensuring the reactor's continuous online operation. This fuel loading and unloading system leverages the advantageous geometry of spherical elements and employs two spherical element conveying methods to achieve element circulation, loading, and unloading: gravity conveying using the spherical elements' own weight, and pneumatic conveying using compressed gas.

[0003] A Chinese invention patent (publication number CN103474113B) discloses a pebble bed modular high-temperature gas-cooled reactor fuel loading and unloading system, which includes six helium pneumatic conveying circuits and branches for fuel circulation and spent fuel unloading under dual-stack conditions, as well as a compressed air pneumatic conveying circuit for secondary lifting of spent fuel. Due to the large amount and high speed of fuel circulation and unloading, the fuel enters the core spent fuel temporary storage device in the form of a continuous discrete ball flow in the pipeline. These pneumatic conveying circuits and branches cannot be completely isolated from the core physically, and the pressure and temperature of the pneumatic conveying circuit are different from those of the core. Therefore, the pneumatic conveying circuit is not only closely related to the pressure level of the first circuit, but also has flow exchange with the core at the top and bottom of the core. In order to ensure the stability of the pneumatic conveying and loading of spherical elements into the stack, a flow blocking device that limits the airflow exchange must be set in front of the ball path entrance.

[0004] In order to limit the exchange of airflow between the primary circuit and the pneumatic conveying circuit, a Chinese invention patent (publication number CN109830319B) discloses a flow blocker for a high-temperature gas-cooled reactor. The flow blocker is designed to transport spherical materials in a unified manner by reciprocating the receiving cup on the rotor assembly between the feed port and the discharge port. At the same time, the rotor assembly creates a flow blockage effect between the feed port and the discharge port. However, due to installation space limitations and a small horizontal installation angle, the angle between the discharge port and the horizontal plane is small, so dust and debris in the receiving cup cannot be discharged by gravity. The continuously accumulated dust and debris will cause the spherical element of the receiving cup to be raised. Once the spherical material in the receiving cup protrudes from the outer surface of the rotor assembly, a difficult-to-resolve rotor assembly jam will occur.

[0005] Therefore, it is urgent to solve the problem in the prior art that dust and debris are easily accumulated in the receiving cup of the baffle, causing the spherical material to protrude above the outer surface of the rotor assembly, resulting in the rotor assembly being stuck. Summary of the Invention

[0006] The present invention provides a high temperature gas-cooled reactor baffle device for solving the defect in the prior art that dust and debris are easily accumulated in a receiving cup of the baffle, thereby achieving the effect of conveniently clearing the dust and debris accumulated in the receiving cup.

[0007] The present invention provides a high-temperature gas-cooled reactor choke device, comprising: a base body and a rotor, wherein a chamber is provided inside the base body, and a portion of the rotor is rotatably disposed in the chamber;

[0008] The seat body is provided with a feed channel and a discharge channel communicating with the chamber, and the feed channel and the discharge channel are distributed along the circumference of the rotor;

[0009] The outer wall of the rotor blocks the feed channel and the discharge channel, and a receiving cup is provided on the surface of the rotor for docking with any one of the feed channel and the discharge channel. The inner wall of the receiving cup is provided with a connecting hole set through, and the base body is provided with an air flow channel set through and connected to the connecting hole.

[0010] According to a high-temperature gas-cooled reactor choke device provided by the present invention, the base body is also provided with a collection trough, which is arranged at one end of the chamber away from the rotor extension part, and the airflow channel and the connecting hole are both connected to the collection trough, and the connecting hole is arranged on the side of the receiving cup close to the collection trough.

[0011] According to a choke device for a high-temperature gas-cooled reactor provided by the present invention, a support column is provided on the bottom wall of the receiving cup opposite to the cup opening of the receiving cup, and the opening of the communicating hole is arranged opposite to the support column.

[0012] According to a choke device for a high-temperature gas-cooled reactor provided by the present invention, the portion of the rotor disposed in the chamber is a cylindrical structure, and the cylindrical structure cooperates with the inner wall of the chamber.

[0013] According to a high-temperature gas-cooled reactor choke device provided by the present invention, the part of the rotor arranged in the chamber is a spherical structure, and the inlet end of the discharge channel and the outlet end of the feed channel are both provided with annular curved surfaces for cooperating with the outer wall of the spherical structure.

[0014] According to the present invention, a high-temperature gas-cooled reactor choke device further includes a sliding sleeve and an elastic member. The sliding sleeve is a cylindrical structure and can be slidably mounted on the inlet end of the discharge channel. The end of the sliding sleeve close to the chamber is provided with the annular curved surface. The two ends of the elastic member are respectively connected to the base body and the sliding sleeve, and are used to drive the sliding sleeve to move in a direction close to the rotor.

[0015] According to the present invention, a high-temperature gas-cooled reactor choke device further includes a fixed sleeve, which is a cylindrical structure and is arranged at the outlet end of the feed channel. The annular curved surface is provided at one end of the fixed sleeve close to the chamber.

[0016] According to a high temperature gas-cooled reactor choke device provided by the present invention, the base body includes a box structure, a flange cover, a first bushing and a second bushing;

[0017] The top of the box structure is provided with an opening, and the flange cover is connected to the box structure to close the opening;

[0018] The first bushing and the second bushing are distributed along the axial direction of the rotor, and the first bushing and the second bushing are connected to form a bushing. The spherical structure is arranged in the bushing. Along the direction from the opening to the bottom wall of the box structure, the first bushing and the second bushing are arranged in the box in sequence, and a through hole for connecting the rotor and the driving mechanism is provided on the flange cover.

[0019] According to a high-temperature gas-cooled reactor flow control device provided by the present invention, a sealing plate is provided at one end of the second sleeve away from the first sleeve, and a material collection groove is provided on the inner wall of the sealing plate. The airflow channel and the connecting hole are both connected to the material collection groove, and the connecting hole is arranged on the side of the receiving cup close to the material collection groove.

[0020] According to a high-temperature gas-cooled reactor flow control device provided by the present invention, the second bushing is arranged to penetrate at one end away from the first bushing, and a collection groove is provided at a position opposite to the bottom wall of the box structure and the second bushing. The airflow channel and the connecting hole are both connected to the collection groove, and the connecting hole is arranged on the side of the receiving cup close to the collection groove.

[0021] According to a high-temperature gas-cooled reactor choke device provided by the present invention, it also includes a first bearing, a support is provided in the collecting trough, the rotor is provided with a bearing mounting hole, the outer ring of the first bearing is installed in the bearing mounting hole, and the inner ring of the first bearing is sleeved on the support.

[0022] According to a high-temperature gas-cooled reactor choke device provided by the present invention, it also includes a limiting column and a limiting groove that slides with the limiting column. One of the seat body and the rotor is provided with the limiting groove, and the other is provided with the limiting column. The limiting groove is an arc structure and is coaxial with the rotation axis of the rotor. The two ends of the limiting groove correspond to the feed channel and the discharge channel respectively.

[0023] The HTGR flow control device provided by the present invention, during use, connects a receiving cup on the rotor surface to the feed channel, allowing material supplied from upstream to enter the receiving cup. The rotor is then rotated to connect the receiving cup to the discharge channel, where the material is discharged under the action of gravity. While transporting material, the rotor blocks the feed and discharge channels, creating a flow control effect that hinders airflow exchange between the upstream and downstream sides of the HTGR flow control device.

[0024] When the HTGR choke stops guiding material, the receiving cup can be docked with the feed channel. A purge airflow from upstream of the HTGR choke is then used to sequentially purge the feed channel, the receiving cup, the connecting hole, and the airflow channel, allowing dust and debris within the feed channel, the receiving cup, the connecting hole, and the airflow channel to be discharged from the airflow channel outside the housing. Of course, a reverse purge airflow can also be introduced through the airflow channel, sequentially sweeping the airflow channel, the connecting hole, the receiving cup, and the feed channel to purge dust and debris upstream of the HTGR choke. In this way, dust and debris within the receiving cup and the feed channel can be purged to the exterior of the HTGR choke through forward and reverse bidirectional purges, preventing accumulation of dust and debris within the HTGR choke. Similarly, the receiving cup can be docked with the discharge channel, and the discharge channel and receiving cup can then be purged in the same manner as described above.

[0025] In addition, when the problem of material jam occurs, reverse airflow can be introduced into the airflow channel to use the pushing effect of the airflow to clear the jammed material.

[0026] With such an arrangement, the high-temperature gas-cooled reactor choke device provided by the present invention can perform forward and reverse bidirectional sweeping on the feed channel, the discharge channel and the receiving cup, so that the dust and debris in the feed channel, the discharge channel and the receiving cup are discharged, thereby solving the problem that dust and debris are easily accumulated in the receiving cup, causing the surface of the material to exceed the rotor surface, resulting in rotor jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 1 is a schematic structural diagram of a first high-temperature gas-cooled reactor choke device provided in an embodiment of the present invention;

[0029] Figure 2 yes Figure 1A schematic structural diagram of the box structure of the choke device of the high-temperature gas-cooled reactor is shown;

[0030] Figure 3 yes Figure 1 A schematic structural diagram of a first bushing and a second bushing of a choke device of a high-temperature gas-cooled reactor is shown;

[0031] Figure 4 yes Figure 1 The schematic diagram of the structure of the rotor and bushing of the choke device of the high temperature gas-cooled reactor shown;

[0032] Figure 5 yes Figure 1 A schematic diagram of the material guiding process of the choke device of the high temperature gas-cooled reactor is shown;

[0033] Figure 6 yes Figure 1 A schematic structural diagram of the airflow channel of the choke device of the high-temperature gas-cooled reactor is shown;

[0034] Figure 7 1 is a schematic structural diagram of a second high-temperature gas-cooled reactor choke device provided in an embodiment of the present invention;

[0035] Figure 8 yes Figure 7 The schematic diagram of the structure of the rotor and bushing of the choke device of the high temperature gas-cooled reactor shown;

[0036] Figure 9 yes Figure 7 A schematic structural diagram of a liner of a choke device of a high-temperature gas-cooled reactor is shown;

[0037] Figure 10 It is a structural schematic diagram of the third high-temperature gas-cooled reactor choke device provided in an embodiment of the invention.

[0038] Reference numerals:

[0039] 1. Chamber; 2. Rotor; 3. Receiving cup; 4. Connecting hole; 5. Air flow channel; 6. Collecting trough; 7. Support column; 8. Spherical structure; 9. Annular surface; 10. Sliding sleeve; 11. Elastic member; 12. Fixed sleeve; 13. Box structure; 14. Flange cover; 15. First bushing; 16. Second bushing; 17. Closing plate; 18. First bearing; 19. Support column; 20. Limiting column; 21. Limiting groove; 22. Feed pipe; 23. Discharge pipe; 24. Feed through hole; 25. Discharge through hole; 26. Feed hole 27. Discharge hole; 28. Power assembly; 29. ​​Inner magnetic assembly; 30. Outer magnetic assembly; 31. Isolation cover; 32. Coupling; 33. Second bearing; 34. Third bearing; 35. Positioning seat; 36. Round nut; 37. Straight pipe; 38. Bend pipe; 39. First flange; 40. Second flange; 41. Pipe joint; 43. Protective sleeve; 44. Spherical element; 45. Third flange; 46. Adapter; 47. Sealing gasket; 48. Limit plate; 49. Mounting surface; 50. Bearing seat; 51. Boss; 52. Countersunk hole. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0041] Existing flow control devices for high-temperature gas-cooled reactors only serve to guide material. When installed horizontally at a small angle, they are unable to remove dust and debris from the receiving cup, causing them to accumulate. This can easily cause material entering the cup to be lifted above the outer surface of the rotor, causing the rotor to become blocked and unable to rotate. To address this problem, embodiments of the present invention provide a flow control device for a high-temperature gas-cooled reactor.

[0042] The following combination Figures 1 to 10 A choke device for a high-temperature gas-cooled reactor provided in an embodiment of the present invention is described.

[0043] Specifically, the choke device of the high temperature gas-cooled reactor includes a seat body and a rotor 2.

[0044] The base body has a chamber 1 inside, and a portion of the rotor 2 is rotatably disposed in the chamber 1. For example, one end of the rotor 2 extends into the chamber 1, and the other end extends from the chamber 1 for connection with a drive mechanism, which is used to drive the rotor 2 to rotate.

[0045] The base body is provided with a feed channel and a discharge channel communicating with the chamber 1. The feed channel and the discharge channel are distributed along the circumference of the rotor 2. For example, the feed channel and the discharge channel both extend perpendicular to the rotation axis of the rotor 2. Optionally, the feed channel and the discharge channel are respectively provided on two opposite side walls of the base body and are coaxially arranged.

[0046] refer to Figure 5 As shown, the outer wall of the rotor 2 blocks the feed channel and the discharge channel. Specifically, the outer wall of the rotor 2 blocks the outlet end of the feed channel and the inlet end of the discharge channel. The outlet end of the feed channel refers to the end of the feed channel connected to the chamber 1, and the inlet end of the discharge channel refers to the end of the feed channel connected to the chamber 1. The surface of the rotor 2 is provided with a receiving cup 3 for accommodating materials, which is used to dock with either the feed channel or the discharge channel. It should be noted that the materials described in this application all refer to spherical elements 44. The receiving cup 3 is actually a receiving groove provided on the surface of the rotor 2 and recessed into the interior of the rotor 2. The receiving cup 3 is used to dock with either the feed channel or the discharge channel, which means that as the rotor 2 rotates, the receiving cup 3 can dock with the feed channel and the discharge channel in turn. The docking of the receiving cup 3 with the feed channel means that the cup mouth of the receiving cup 3 is opposite to the outlet end of the feed channel. The docking of the receiving cup 3 with the discharge channel means that the cup mouth of the receiving cup 3 is opposite to the inlet end of the discharge channel. The seat body is provided with an air flow channel 5 which is arranged through and communicates with the communication hole 4 .

[0047] refer to Figure 5 As shown, the HTGR flow control device provided in an embodiment of the present invention utilizes a material receiving cup 3 disposed on the surface of rotor 2 to connect with the feed channel, allowing material supplied from upstream to enter the receiving cup 3. Rotating rotor 2 then aligns the receiving cup 3 with the discharge channel, where the material is discharged under the action of gravity. While transporting material, rotor 2 blocks the feed and discharge channels, creating a flow control effect that hinders airflow exchange between the upstream and downstream sides of the HTGR flow control device.

[0048] When the HTGR choke stops feeding, the receiving cup 3 can be docked with the feed channel. A purge airflow from upstream of the HTGR choke is then used to sequentially purge the feed channel, the receiving cup 3, the connecting hole 4, and the airflow channel 5, allowing dust and debris within the feed channel, the receiving cup 3, the connecting hole 4, and the airflow channel 5 to be discharged from the housing through the airflow channel 5. Of course, a reverse purge airflow can also be introduced through the airflow channel 5, sequentially sweeping the airflow channel 5, the connecting hole 4, the receiving cup 3, and the feed channel to purge dust and debris upstream of the HTGR choke. In this way, dust and debris within the receiving cup 3 and the feed channel can be purged to the exterior of the HTGR choke through forward and reverse purges, preventing accumulation of dust and debris within the HTGR choke. Similarly, docking the receiving cup 3 with the discharge channel allows the discharge channel and the receiving cup 3 to be bidirectionally purged in the same manner as described above.

[0049] In addition, when a problem of material blockage occurs, a reverse airflow may be introduced into the airflow channel 5 to clear the blocked material by utilizing the pushing effect of the airflow.

[0050] With such an arrangement, the high-temperature gas-cooled reactor choke device provided by the present invention can perform forward and reverse bidirectional sweeping on the feed channel, the discharge channel and the receiving cup 3, so that the dust and debris in the feed channel, the discharge channel and the receiving cup 3 are discharged, thereby solving the problem that dust and debris are easily accumulated in the receiving cup 3, causing the surface of the material to exceed the surface of the rotor 2, resulting in obstruction of the rotor 2.

[0051] refer to Figure 1 As shown, in some embodiments provided by the present invention, the choke device of the high-temperature gas-cooled reactor further includes a feed pipe 22 and a discharge pipe 23 provided on the outer wall of the base body. The feed pipe 22 is connected to the feed channel, and the discharge pipe 23 is connected to the discharge channel.

[0052] refer to Figure 1 、 Figure 7 and Figure 10 As shown, in some embodiments provided herein, the base body is further provided with a material collection trough 6. This trough 6 is located at the end of the chamber 1, away from the protruding portion of the rotor 2. The protruding portion of the rotor 2 refers to the portion of the rotor 2 extending from the chamber 1. Both the airflow channel 5 and the connecting hole 4 are connected to the material collection trough 6. Specifically, the connecting hole 4 is connected to the airflow channel 5 via the material collection trough 6. The connecting hole 4 is located on the side of the receiving cup 3 closest to the material collection trough 6.

[0053] By providing a collection trough 6 on the base body and providing a connecting hole 4 on the side of the receiving cup 3 near the collection trough 6, dust and debris in the receiving cup 3 can fall through the connecting hole 4 into the collection trough 6 for temporary storage. During the purge operation, the dust and debris in the collection trough 6 are then discharged from the airflow channel 5, the discharge channel, or the feed channel by the purge airflow. Utilizing the collection trough 6 to accommodate the dust and debris in the receiving cup 3 can improve the dust and debris holding capacity of the high-temperature gas-cooled reactor's choke device, accommodating a greater amount of dust and debris of larger size, preventing dust and debris from accumulating in the receiving cup 3, and extending the interval between dust and debris purges.

[0054] In addition, by providing the material collecting groove 6, the connecting hole 4 can always be connected to the air flow channel 5 through the material collecting groove 6 as the rotor 2 rotates. Of course, in other embodiments, two air flow channels 5 can be provided, corresponding to the two positions of the connecting hole 4. The two positions of the connecting hole 4 refer to the two positions of the connecting hole 4 when the receiving cup 3 is connected to the feed channel and the discharge channel respectively.

[0055] In some embodiments provided herein, a support column 7 is provided on the bottom wall of the receiving cup 3 opposite the cup opening of the receiving cup 3, and the opening of the communicating hole 4 is disposed opposite the support column 7. With this arrangement, when material enters the receiving cup 3, it is supported by the support column 7, creating a large gap between the material and the bottom wall of the receiving cup 3. This allows dust and debris pushed into the receiving cup 3 by the flow of the material to fall smoothly through the communicating hole 4 into the collecting trough 6, thus preventing the material in the receiving cup 3 from being filled with debris and a large amount of dust, which could cause the rotor 2 to become stuck.

[0056] Furthermore, the radius of the communicating hole 4 is greater than or equal to the radius of the material. In this way, some large-sized debris can also fall into the collecting trough 6 and be collected, thereby preventing large-sized debris from raising the material in the receiving cup 3 and reducing the risk of the rotor 2 being blocked.

[0057] In some embodiments provided herein, the size of the mouth of the receiving cup 3 along the rotational direction of the receiving cup 3 is greater than the diameter of the material. The size of the mouth of the receiving cup 3 along the rotational direction of the receiving cup 3 is actually the size of the mouth of the receiving cup 3 perpendicular to the rotational axis of the rotor 2. This configuration allows the receiving cup 3 to have greater angular compatibility in the rotational direction, ensuring smooth material flow in and out of the receiving cup 3 even when the stopping position of the receiving cup 3 is not completely aligned with the discharge channel or the feed channel. This configuration allows the HTGR choke to guide the material properly even if the stopping position of the rotor 2 is inaccurate due to wear, clearance, or error, thereby ensuring the reliability of the continuous operation of the rotor 2. Furthermore, this configuration improves the interchangeability of the rotor 2 and ensures convenient installation of the rotor 2. Optionally, the size of the receiving cup 3 along the rotational direction can gradually decrease from the mouth of the receiving cup 3 toward the bottom wall, forming a tapered hole.

[0058] Furthermore, the distance between the end of the support column 7 away from the bottom wall of the receiving cup 3 and the mouth of the receiving cup 3 is only used to accommodate one spherical element 44. Figure 5 As shown, when the receiving cup 3 is docked with the feed channel, only one of the materials arranged in a string can enter the receiving cup 3. As the rotor 2 rotates, the receiving cup 3 drives the displacement of a single material, and the remaining material is separated and blocked by the outer wall of the rotor 2 in the feed pipe 22 and the feed channel. When the receiving cup 3 is docked with the discharge channel, the material in the receiving cup 3 flows out by gravity and is discharged outside the high-temperature gas-cooled reactor choke device through the discharge channel and the discharge pipe 23. Then, the rotor 2 rotates again until the receiving cup 3 is docked with the feed channel, and the above process is repeated. With such an arrangement, the high-temperature gas-cooled reactor choke device provided in the embodiment of the present invention can separate a single material from the string of materials for transportation, thereby realizing the function of singular material collection and transportation of the string of materials and separating the remaining materials.

[0059] In some embodiments provided by the present invention, the portion of the rotor 2 disposed in the chamber 1 is a cylindrical structure, and the cylindrical structure cooperates with the inner wall of the chamber 1. Figure 3 As shown, the chamber 1 is a cylindrical structure. The cylindrical structure of the rotor 2 is clearance-matched with the chamber 1, and the gap between the two forms a flow-blocking structure.

[0060] Of course, the portion of the rotor 2 disposed in the chamber 1 is not limited to being a cylindrical structure. For example, in other embodiments provided by the present invention, the portion of the rotor 2 disposed in the chamber 1 is a spherical structure 8. Figure 3 、 Figure 8As shown, both the inlet end of the discharge channel and the outlet end of the feed channel are provided with an annular surface 9 for mating with the outer wall of the spherical structure 8. For example, the spherical structure 8 and the annular surface 9 are clearance-fitted. With this arrangement, compared to the arrangement in which the entire outer wall of the cylindrical structure is mated with the inner wall of the chamber 1, the spherical structure 8 is mated with the annular surface 9. This results in a smaller contact surface between the spherical structure 8 and the annular surface 9, making it easier to ensure the precision of their mating, thereby improving the flow resistance and operational stability. Optionally, the gap between the spherical structure 8 and the annular surface 9 ranges from 0.05 to 0.1 mm.

[0061] Alternatively, as Figure 3 As shown, chamber 1 is a cylindrical structure with a diameter equal to that of spherical structure 8. Annular surface 9 is a tapered hole formed on the inner wall of chamber 1, and the wall of the tapered hole is a curved surface structure that mates with spherical structure 8. As spherical structure 8 rotates within chamber 1, its outer wall always mates with annular surface 9, creating a constant flow-blocking gap between them. Furthermore, annular surface 9 at the outlet of the feed channel is coaxial with the feed channel, and annular surface 9 at the inlet of the discharge channel is coaxial with the discharge channel.

[0062] refer to Figure 7 、 Figure 8 As shown, in some embodiments provided by the present invention, the HTGR choke device further includes a sliding sleeve 10 and an elastic member 11. The sliding sleeve 10 is a cylindrical structure that is slidably mounted within the inlet end of the discharge channel. An annular curved surface 9 is provided on the end of the sliding sleeve 10 proximal to the chamber 1. The elastic member 11 is connected at both ends to the base and the sliding sleeve 10, respectively, and is used to drive the sliding sleeve 10 toward the rotor 2. Because high-pressure gas flows downstream of the HTGR choke device, this downstream high-pressure gas enters through the discharge channel and acts on the rotor 2, pushing it toward the feed channel. During operation, the spherical structure 8 of the rotor 2 inevitably rubs and wears against the annular curved surface 9 of the feed channel. Long-term wear can easily cause the spherical structure 8 to shift toward the feed channel, increasing the gap between the spherical structure 8 and the annular curved surface 9 of the discharge channel, ultimately reducing the choke effect between the discharge channel and the spherical structure 8. By providing the sliding sleeve 10 and the elastic member 11, the sliding sleeve 10 can be moved toward the spherical structure 8 under the action of the elastic member 11. In this configuration, when the rotor 2 deviates toward the feed channel, the elastic member 11 drives the sliding sleeve 10 to move, so that the annular surface 9 of the sliding sleeve 10 can always mate with the spherical structure 8, thereby compensating for the gap between the annular surface 9 of the discharge channel and the spherical structure 8, and ensuring a reliable flow blocking effect between the annular surface 9 of the discharge channel and the spherical structure 8. Optionally, the elastic member 11 includes, but is not limited to, a spring and rubber.

[0063] In some embodiments provided by the present invention, the high-temperature gas-cooled reactor choke device also includes a fixed sleeve 12, which is a cylindrical structure. The fixed sleeve 12 is arranged in the outlet end of the feed channel, and an annular curved surface 9 is provided at one end of the fixed sleeve 12 close to the chamber 1.

[0064] Furthermore, one end of the sliding sleeve 10 close to the chamber 1 and one end of the fixed sleeve 12 close to the chamber 1 both protrude from the inner wall of the chamber 1 , and the inner diameter of the chamber 1 is greater than the diameter of the spherical structure 8 .

[0065] In some embodiments provided herein, the choke device for a high-temperature gas-cooled reactor further includes a sealing gasket 47. Each annular curved surface 9 is provided with an annular groove for mounting the sealing gasket 47, and the sealing gasket 47 is mounted within the groove of the annular curved surface 9. The provision of the sealing gasket 47 can, on the one hand, improve the choke effect between the rotor 2 and the annular curved surface 9, and, on the other hand, because the hardness of the sealing gasket 47 is generally lower than that of the rotor 2, it can reduce wear on the rotor 2, making the sealing gasket 47 a consumable part, thereby improving the convenience of replacing the consumable part and reducing the replacement cost of the consumable part.

[0066] In some embodiments provided by the present invention, the seat body includes a box structure 13 , a flange cover plate 14 , a first bushing 15 and a second bushing 16 .

[0067] The top of the box structure 13 is open, and a flange cover 14 is connected to the box structure 13 to seal the opening. Optionally, the flange cover 14 is connected to the box structure 13 using threaded fasteners. For example, screws can be passed through the flange cover 14 and threadedly connected to the box structure 13, thereby connecting the flange cover 14 and the box structure 13. Furthermore, a seal is provided between the box structure 13 and the flange cover 14.

[0068] The first bushing 15 and the second bushing 16 are distributed along the axial direction of the rotor 2. The first bushing 15 and the second bushing 16 are connected to form a bushing. The space inside the bushing forms the chamber 1, and the spherical structure 8 of the rotor 2 is arranged in the bushing. Optionally, the first bushing 15 and the second bushing 16 can be connected by screws. For example, the screw passes through the second bushing 16 and is threadedly connected to the first bushing 15, thereby connecting the first bushing 15 and the second bushing 16. Along the direction from the opening to the bottom wall of the box structure 13, the first bushing 15 and the second bushing 16 are sequentially arranged in the box structure 13. The flange cover 14 is provided with a through hole for connecting the rotor 2 to the drive mechanism. For example, one end of the rotor 2 is arranged in the bushing, and the other end of the rotor 2 extends from the through hole on the flange cover 14 and is connected to the drive mechanism.

[0069] Correspondingly, if Figure 1As shown, the feed channel includes a feed hole 24 and a feed hole 26. The feed hole 24 is provided on the side wall of the box structure 13, and the feed hole 26 is provided on the side wall of the bushing and opposite to the feed hole 24. The discharge channel includes a discharge hole 25 and a discharge hole 27. The discharge hole 25 is provided on the side wall of the box structure 13, and the discharge hole 27 is provided on the side wall of the bushing and opposite to the discharge hole 25.

[0070] like Figure 3 As shown, in the embodiment where the annular surface 9 is directly provided on the inner wall of the bushing, the annular surface 9 is divided into two semi-annular surfaces, which are respectively provided on the first bushing 15 and the second bushing 16. After the first bushing 15 and the second bushing 16 are connected, the two semi-annular surfaces are butted together to form the annular surface 9. When it is necessary to install the spherical structure 8 of the rotor 2 in the bushing, the first bushing 15 and the second bushing 16 are first disassembled, the spherical structure 8 of the rotor 2 is installed in the second bushing 16, and then the first bushing 15 is sleeved onto the rotor 2 from the end of the rotor 2 away from the spherical structure 8. Finally, the first bushing 15 and the second bushing 16 are connected to form a bushing that is sleeved outside the spherical structure 8 of the rotor 2.

[0071] like Figure 8 As shown, in the embodiment where the annular curved surface 9 is provided on the end surface of the sliding sleeve 10, a limit plate 48 is provided on the first bushing, and the number of the limit plates 48 is two. Among them, one limit plate 48 is provided at the end of the feed hole 26 away from the chamber, and is used to abut against the end of the fixed sleeve 12 away from the chamber 1. The other limit plate 48 is provided at the end of the discharge hole 27 away from the chamber, and is used to abut against the end of the sliding sleeve 10 away from the chamber 1. The limit plates 48 can limit the fixed sleeve 12 and the sliding sleeve 10, so that the annular curved surface 9 can maintain an accurate matching relationship with the spherical structure 8 of the rotor 2. The feed hole 26 and the discharge hole 27 each include two semicircular holes respectively provided on the first bushing 15 and the second bushing 16. After the first bushing 15 and the second bushing 16 are connected, the semicircular holes on the first bushing 15 and the semicircular holes on the second bushing 16 are docked to form the feed hole 26 or the discharge hole 27.

[0072] When the spherical structure 8 of the rotor 2 needs to be installed in the bushing, the first bushing 15 and the second bushing 16 are first disassembled, and then the sliding sleeve 10 and the fixed sleeve 12 are installed. Since the first bushing 15 is not installed at this time, the limit plates 48 on the first bushing 15 will not limit the sliding sleeve 10 and the fixed sleeve 12, and the sliding sleeve 10 and the fixed sleeve 12 can move away from the chamber 1 to avoid the spherical structure 8. The spherical structure 8 of the rotor 2 is then placed in the second bushing 16, and the first bushing 15 is then inserted onto the rotor 2 from the end away from the spherical structure 8, with the two limit plates 48 on the first bushing 15 respectively abutting against the sliding sleeve 10 and the fixed sleeve 12, so that the sliding sleeve 10 and the fixed sleeve are both in a position to cooperate with the spherical structure 8 of the rotor 2. Finally, the first bushing 15 and the second bushing 16 are connected to form a bushing that is inserted outside the spherical structure 8 of the rotor 2.

[0073] Furthermore, the choke device of the high temperature gas-cooled reactor further includes a positioning seat 35. The first bushing 15 is connected to the box structure 13 through the positioning seat 35. The positioning seat 35 is configured as an annular structure, and the positioning seat 35 is connected to the end of the first bushing 15 away from the second bushing 16. Figure 1 、 Figure 4 As shown, the first bushing 15 can be connected to the positioning seat 35 by threaded fasteners. A mounting surface 49 is provided inside the box structure 13, and the positioning seat 35 is supported on the mounting surface 49 and connected to the mounting surface 49 by threaded fasteners.

[0074] Optionally, in order to ensure that the feed hole 26 and the discharge hole 27 on the bushing are aligned with the feed through hole 24 and the discharge through hole 25 of the box structure 13 respectively, the positioning seat 35 can be connected to the bushing first, and then the positioning seat 35 can be positioned on the mounting surface 49 by positioning pins, and finally the positioning seat 35 can be fixed to the mounting surface 49 by threaded fasteners to ensure accurate positioning during the installation process.

[0075] Optionally, the rotor 2 is rotatably matched with the positioning seat 35. Specifically, the high temperature gas-cooled reactor choke device further includes a second bearing 33, a round nut 36 and a stop washer. Figure 4 As shown, the inner ring of the second bearing 33 is mounted on the rotor 2, and the end of the inner ring closest to the spherical structure 8 abuts against the shoulder on the rotor 2. The outer ring of the second bearing 33 is mounted in the inner hole of the positioning seat 35 by means of a retaining spring. The rotor 2 is rotatably connected to the positioning seat 35 via the second bearing 33. A round nut 36 is mounted on the rotor 2 and threadedly engaged with the rotor 2. The round nut 36 abuts against the end of the inner ring of the second bearing 33 away from the spherical structure 8 to secure the second bearing 33. A retaining washer is mounted on the rotor 2 and connected to the rotor 2, and the retaining washer abuts against the end of the round nut 36 away from the second bearing 33 to prevent the round nut 36 from loosening.

[0076] Furthermore, the rotor 2 is rotationally matched with the flange cover 14. Figure 1 Specifically, the HTGR choke device further includes a third bearing 34 and a bearing seat 50. The bearing seat 50 can be connected to the flange cover 14 via threaded fasteners. The outer ring of the third bearing 34 is mounted on the bearing seat 50, and the inner ring of the third bearing 34 is sleeved onto the rotor 2. The dual-bearing configuration of the second bearing 33 and the third bearing 34 improves the stress state of the rotor 2 during operation and increases the service life of the rotor 2.

[0077] Optionally, the choke device of the high temperature gas-cooled reactor further includes a driving mechanism connected to the portion of the rotor 2 extending out of the flange cover 14 for driving the rotor 2 to rotate.

[0078] For example, the drive mechanism includes a power assembly 28, a coupling 32, and a magnetic transmission. The magnetic transmission includes an inner magnetic assembly 29, an isolation cover 31, an outer magnetic assembly 30, and a bracket, which are arranged in sequence from the inside to the outside. The bracket can be connected to the flange cover 14 via threaded fasteners, the outer magnetic assembly 30 is sleeved on the outside of the inner magnetic assembly 29, and the isolation cover 31 is arranged between the outer magnetic assembly 30 and the inner magnetic assembly 29, so that the inner magnetic assembly 29 and the outer magnetic assembly 30 form a magnetic coupling connection. The output shaft of the power assembly 28 is connected to the outer magnetic assembly 30 of the magnetic transmission via a coupling 32. The end of the rotor 2 away from the spherical structure 8 is provided with a spline. The rotor 2 extends into the inner magnetic assembly 29 and is connected to the inner magnetic assembly 29 via the spline. The lag angle between the inner magnetic assembly 29 and the outer magnetic assembly 30 is less than 0.2, so as to ensure that the angle at which the inner magnetic assembly 29 can drive the rotor 2 to rotate is consistent with the output angle of the power assembly 28. Optionally, the power assembly 28 is a servo drive system, and the servo drive system can be a servo reduction motor.

[0079] refer to Figure 1 and Figure 4 As shown, in some embodiments provided by the present invention, a sealing plate 17 is provided at one end of the second bushing 16 away from the first bushing 15. The inner wall of the sealing plate 17 is provided with a collecting groove 6, and the air flow channel 5 and the connecting hole 4 are both connected to the collecting groove 6. The connecting hole 4 is provided on the side of the receiving cup 3 close to the collecting groove 6. In this way, the material in the receiving cup 3 can enter the collecting groove 6, and the collecting groove 6 is used to accommodate the dust and debris in the receiving cup 3. This can improve the dust and debris holding capacity of the high-temperature gas-cooled reactor choke device, accommodate more dust and debris of larger size, avoid the accumulation of dust and debris in the receiving cup 3, and extend the interval time for blowing off dust and debris.

[0080] During the operation of the choke device, dust and debris will cause radioactive contamination to the choke device. When the choke device needs to be repaired, the bushing, positioning seat 35, second bearing 33, rotor 2, drive mechanism and round nut 36 need to be disassembled and decontaminated one by one on site. Not only is the operation process cumbersome, but there is also the risk of exposure to the cabin environment and disassembled parts, which can easily cause harm to maintenance personnel. By providing a sealing plate 17 on the second bushing 16, the bushing, positioning seat 35, second bearing 33, round nut 36 and rotor 2 can be combined into a cage assembly. The cage assembly is a whole. On site, it only needs to be disassembled as a whole, and then the cage assembly is transported to the hot machine repair workshop for decontamination and parts replacement, so that maintenance personnel do not have to be exposed to the cabin for a long time, and equipment maintenance and adjustment are more convenient.

[0081] refer to Figure 2 and Figure 4 As shown, further, a boss 51 is provided at the bottom of the sealing plate 17, and a countersunk hole 52 is provided inside the box structure 13 for cooperating with the boss 51. This arrangement can position the bushing.

[0082] Furthermore, the airflow channel 5 sequentially passes through the box structure 13 and the second bushing 16 and is connected to the collecting tank 6. During the purging operation, the purge airflow can be blown in the direction of the receiving cup 3, the connecting hole 4, the collecting tank 6 and the airflow channel 5 in a forward direction, or in the reverse direction of the airflow channel 5, the collecting tank 6, the connecting hole 4 and the receiving cup 3.

[0083] like Figure 6 、 Figure 7 As shown, the HTGR choke device optionally further includes a purge pipeline and a pipe joint 41. The purge pipeline is connected to the outside of the box structure 13 and communicates with the air flow channel 5. The pipe joint 41 is provided on the purge pipeline for connecting to the gas pipe.

[0084] In some embodiments provided by the present invention, Figure 6 As shown, the air flow channel 5 extends laterally toward the box structure 13. For example, the extension direction of the air flow channel 5 is perpendicular to the rotation axis of the rotor 2. The air flow channel 5 passes through the box structure 13 and the bushing in sequence and is connected to the aggregate trough 6. Furthermore, the purge pipeline includes a straight pipe 37, a curved pipe 38, a first flange 39 and a second flange 40 connected in sequence. The straight pipe 37 is connected to the box structure 13, and the second flange 40 is arranged at the end of the straight pipe 37 away from the box structure 13. The second flange 40 and the first flange 39 are connected by threaded fasteners, and a pipe joint 41 is arranged on the second flange 40. Furthermore, the inner diameters of the air flow channel 5, the straight pipe 37 and the curved pipe 38 are all greater than or equal to the diameter of the material. With such an arrangement, when there are debris that cannot be purged inside the aggregate trough 6, the second flange 40 can be removed and cleared and sucked out using special tools.

[0085] Of course, the air flow channel 5 is not limited to extending laterally toward the box structure 13. For example, Figure 7-Figure 9 As shown, in other embodiments provided by the present invention, the airflow channel 5 extends along the direction of the rotation axis of the rotor 2, and the airflow channel 5 sequentially penetrates the bottom wall of the box body and the sealing plate 17 of the second bushing 16 and communicates with the collection trough 6. Such an arrangement, on the one hand, can make the size of the high-temperature gas-cooled reactor choke device in the direction perpendicular to the rotation axis of the rotor 2 smaller, reducing the lateral space occupied by the high-temperature gas-cooled reactor choke device, so as to facilitate the installation of a shield on the outside of the box structure 13. Due to the strong radioactivity of the material and the presence of multiple balls trapped in the choke device, when maintenance personnel enter the cabin, the shielding outside the box structure 13 can prevent excessive exposure to gamma rays from the highly radioactive material in the choke device. On the other hand, dust and debris in the collection trough 6 can directly fall into the purge pipeline through the airflow channel 5, thereby increasing the storage space and capacity of the choke device, and further extending the interval between purging of dust and debris.

[0086] Furthermore, the purge pipeline includes a third flange 45, an adapter 46, a straight pipe 37, a first flange 39, and a second flange 40. The third flange 45 is connected to the bottom of the housing structure 13, and the straight pipe 37 is connected to the third flange 45 via the adapter 46. The first flange 39 is connected to the end of the straight pipe 37 away from the adapter 46, and the second flange 40 is connected to the first flange 39 via threaded fasteners. A pipe joint 41 is provided on the second flange 40.

[0087] refer to Figure 10 As shown, in some embodiments provided by the present invention, the second bushing 16 is provided through one end away from the first bushing 15, and a collection trough 6 is provided on the bottom wall of the box structure 13 at a position opposite to the second bushing 16. The airflow channel 5 and the connecting hole 4 are both connected to the collection trough 6, and the connecting hole 4 is provided on the side of the receiving cup 3 close to the collection trough 6. In this way, the material in the receiving cup 3 can enter the collection trough 6, and the collection trough 6 is used to accommodate the dust and debris in the receiving cup 3, which can improve the dust and debris accommodating capacity of the high-temperature gas-cooled reactor choke device, accommodate more dust and debris of larger size, avoid the accumulation of dust and debris in the receiving cup 3, and extend the interval time for blowing off dust and debris. Furthermore, the airflow channel 5 can extend laterally toward the box structure 13 or along the rotation axis of the rotor 2.

[0088] In some embodiments provided herein, the choke device for the high-temperature gas-cooled reactor further includes a first bearing 18. A support 19 is provided within the hopper 6, and a bearing mounting hole is provided within the rotor 2. The outer ring of the first bearing 18 is mounted within the bearing mounting hole of the rotor 2, and the inner ring of the first bearing 18 is sleeved onto the support 19. The joint support of the rotor 2 by the first bearing 18, the second bearing 33, and the third bearing 34 maintains the overall rigidity and stability of the rotor 2, preventing the rotor 2 from shifting due to gas pressure. This ensures that the gap between the spherical structure 8 and the annular curved surface 9 of the rotor 2 remains within a range of 0.05 to 0.1 mm, preventing the gap from being affected by mechanical friction, bearing play, or jamming.

[0089] Optionally, refer to Figure 1 and Figure 10 As shown, the support 19 can be provided as an integral structure with the aggregate trough 6, or can be provided as a mounted structure.

[0090] refer to Figure 4 、 Figure 8 and Figure 10 As shown, in some embodiments provided herein, a protective sleeve 43 is provided at one end of the rotor 2 near the trough 6. The inner hole of the protective sleeve 43 constitutes the bearing mounting hole. Unlike graphite in air, which has excellent lubricity, the friction coefficient of graphite powder and debris in a helium environment increases significantly by an order of magnitude. By arranging the first bearing 18 within the protective sleeve 43, dust and debris flowing from the receiving cup 3 into the trough 6 can be effectively prevented from entering the first bearing 18 and causing it to become stuck.

[0091] Further, if Figure 4 、 Figure 8 and Figure 10 As shown, the protective sleeve 43 and the rotor 2 are configured as an integral structure or an assembled structure.

[0092] like Figure 1 、 Figure 3 and Figure 5As shown, in some embodiments provided by the present invention, the high-temperature gas-cooled reactor choke device also includes a limiting column 20 and a limiting groove 21 that slides with the limiting column 20. One of the base and the rotor 2 is provided with a limiting groove 21, and the other is provided with a limiting column 20. The limiting groove 21 is an arc-shaped structure and is coaxial with the rotation axis of the rotor 2. The two ends of the limiting groove 21 correspond to the feed channel and the discharge channel respectively. For example, when the limiting column 20 abuts against the first end of the limiting groove 21, the material receiving cup 3 docks with the feed channel. When the limiting column 20 abuts against the second end of the limiting groove 21, the material receiving cup 3 docks with the discharge channel. By cooperating with the limiting column 20 and the limiting groove 21, the rotation angle and stop position of the rotor 2 are limited, which can improve the position accuracy of the rotor 2, enable the material receiving cup 3 to be well docked with the feed channel and the discharge channel, and ensure the stability of the rotor 2 in taking and discharging materials.

[0093] For example, the limiting groove 21 is provided on the rotor 2, and the limiting post 20 is provided on the sealing plate 17 of the second bushing 16 or on the bottom wall of the box structure 13. By increasing the depth of the limiting groove 21, the weight of the rotor 2 can also be reduced.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A high temperature gas-cooled reactor choke device, characterized in that: It comprises a seat body and a rotor (2), wherein a chamber (1) is provided inside the seat body, and a portion of the rotor (2) is rotatably arranged in the chamber (1); The seat body is provided with a feed channel and a discharge channel communicating with the chamber (1), and the feed channel and the discharge channel are distributed along the circumference of the rotor (2); The outer wall of the rotor (2) blocks the feed channel and the discharge channel, a receiving cup (3) is provided on the surface of the rotor (2) for docking with any one of the feed channel and the discharge channel, the inner wall of the receiving cup (3) is provided with a through-going communication hole (4), and the seat body is provided with an airflow channel (5) which is through-going and communicates with the through-going hole (4); The base body is further provided with a material collecting trough (6), which is arranged at one end of the chamber (1) away from the protruding portion of the rotor (2), the air flow channel (5) and the connecting hole (4) are both connected to the material collecting trough (6), and the connecting hole (4) is arranged on a side of the receiving cup (3) close to the material collecting trough (6).

2. The choke device for a high-temperature gas-cooled reactor according to claim 1, characterized in that: A supporting column (7) is provided on the bottom wall of the receiving cup (3) opposite to the cup opening of the receiving cup (3), and the opening of the communicating hole (4) is arranged opposite to the supporting column (7).

3. The choke device for a high temperature gas-cooled reactor according to claim 1, characterized in that: The portion of the rotor (2) disposed in the chamber (1) is a cylindrical structure, and the cylindrical structure cooperates with the inner wall of the chamber (1).

4. The choke device for a high temperature gas-cooled reactor according to claim 1, characterized in that: The portion of the rotor (2) disposed in the chamber (1) is a spherical structure (8), and both the inlet end of the discharge channel and the outlet end of the feed channel are provided with an annular curved surface (9) for cooperating with the outer wall of the spherical structure (8).

5. The choke device for a high temperature gas-cooled reactor according to claim 4, characterized in that: The invention also includes a sliding sleeve (10) and an elastic member (11), wherein the sliding sleeve (10) is a cylindrical structure and can be slidably mounted on the inlet end of the discharge channel. The end of the sliding sleeve (10) close to the chamber (1) is provided with the annular curved surface (9), and the two ends of the elastic member (11) are respectively connected to the seat body and the sliding sleeve (10) for driving the sliding sleeve (10) to move in a direction close to the rotor (2).

6. The choke device for a high temperature gas-cooled reactor according to claim 4, characterized in that: The invention also includes a fixed sleeve (12), which is a cylindrical structure. The fixed sleeve (12) is sleeved on the outlet end of the feed channel, and the annular curved surface (9) is provided at one end of the fixed sleeve (12) close to the chamber (1).

7. The choke device for a high temperature gas-cooled reactor according to any one of claims 4 to 6, characterized in that: The seat body comprises a box structure (13), a flange cover (14), a first bushing (15) and a second bushing (16); The top of the box structure (13) is provided with an opening, and the flange cover (14) is connected to the box structure (13) and is used to close the opening; The first bushing (15) and the second bushing (16) are distributed along the axial direction of the rotor (2); the first bushing (15) and the second bushing (16) are connected to form a bushing; the spherical structure (8) is arranged in the bushing; along the direction from the opening to the bottom wall of the box structure (13), the first bushing (15) and the second bushing (16) are sequentially arranged in the box structure (13); and the flange cover plate (14) is provided with a through hole for connecting the rotor (2) with a driving mechanism.

8. The choke device for a high temperature gas-cooled reactor according to claim 7, characterized in that: A sealing plate (17) is provided at one end of the second bushing (16) away from the first bushing (15), and a collecting groove (6) is provided on the inner wall of the sealing plate (17). The air flow channel (5) and the connecting hole (4) are both connected to the collecting groove (6), and the connecting hole (4) is provided on a side of the receiving cup (3) close to the collecting groove (6).

9. The choke device for a high temperature gas-cooled reactor according to claim 7, characterized in that: The second bushing (16) is provided through one end away from the first bushing (15), and a collecting trough (6) is provided at a position opposite to the bottom wall of the box structure (13) and the second bushing (16). The air flow channel (5) and the connecting hole (4) are both connected to the collecting trough (6), and the connecting hole (4) is provided on a side of the receiving cup (3) close to the collecting trough (6).

10. The choke device for a high temperature gas-cooled reactor according to claim 1, 8 or 9, characterized in that: It also includes a first bearing (18), a support (19) is provided in the collecting trough (6), the rotor (2) is provided with a bearing mounting hole, the outer ring of the first bearing (18) is installed in the bearing mounting hole, and the inner ring of the first bearing (18) is sleeved on the support (19).

11. The choke device for a high temperature gas-cooled reactor according to any one of claims 1 to 6, characterized in that: It also includes a limiting column (20) and a limiting groove (21) that slides with the limiting column (20), one of the seat body and the rotor (2) is provided with the limiting groove (21), and the other is provided with the limiting column (20), the limiting groove (21) is an arc-shaped structure, and is coaxial with the rotation axis of the rotor (2), and the two ends of the limiting groove (21) respectively correspond to the feed channel and the discharge channel.

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