Flow blocking device for pebble bed high temperature reactor

Abstract

The present invention provides a flow-blocking device for a high-temperature pebble bed reactor, comprising: a mounting seat, a mounting cavity is formed inside, the mounting seat is also provided with a ball-injection channel and a ball-outlet channel connected to the mounting cavity; a rotor is rotatably mounted in the mounting cavity, the outer surface of the rotor is recessed inward to form at least one ball-receiving cup, the ball-receiving cup is used to dock with any one of the ball-injection channel and the ball-outlet channel; a leakage hole is provided on the inner wall of the ball-receiving cup, a waste-collecting cavity is formed inside the rotor, and the waste-collecting cavity is connected to the ball-receiving cup through the leakage hole. The flow-blocking device for a high-temperature pebble bed reactor provided by the present invention is used to solve the defect that the rotor is easily stuck in the prior art, and achieves the following technical effects: greatly reducing the amount of waste accumulated in the ball-receiving cup, and reducing the risk of rotor jamming due to waste padding the spherical element, thereby ensuring the smooth rotation of the rotor, and further ensuring the long-term reliable operation of the flow-blocking device.

Description

Technical Field

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

[0002] The pebble bed high temperature gas-cooled reactor is operated by online refueling with multiple passes of fuel elements. The fuel elements that have been circulated multiple times and new fuel elements are usually lifted to the top of the reactor by helium pneumatic conveying to load the core. The helium pneumatic lifting pipeline is part of the main circulation pipeline of the fuel loading and unloading system. Its inlet is located at the bottom outlet section of the main circulation gravity flow unloading pipeline, and its outlet is located at the starting section of the gravity flow inlet pipeline at the top of the reactor. In order to ensure that the pneumatically conveyed spherical elements can smoothly enter the lifting pipeline from the gravity flow unloading pipeline and can stably enter the gravity flow inlet pipeline, a flow blocking device that limits the airflow exchange must be set before starting the pneumatic conveying ball path inlet.

[0003] Chinese invention patent CN109830319B discloses a flow blocker including multiple ball-receiving cups, in which elastic blocks capable of realizing high-temperature thermal expansion compensation and mechanical wear compensation are arranged on both sides of the rotor ball-receiving cup of the flow blocker, and the flow blockage of the pneumatically conveyed high-pressure gas is realized through the curved surface contact between the elastic blocks and the inner liner ring. In order to control the lifting stability of the pneumatically conveyed fuel element, the flow blocker simultaneously performs the singular conveying function of the stringed balls, so that the ball-receiving cup of the flow blocker can just accommodate a spherical element, which is singularly conveyed to the inlet of the pneumatic conveying pipeline by rotating 180°. When the bottom ball in the string enters the ball receiving cup, and the ball receiving cup rotates from the ball receiving position to another ball receiving cup position, the temporarily stored balls in the string will move up and down, forward and backward, left and right, and even rotate slightly at the inlet section of the baffle due to the disturbance of the rotor ball receiving cup and the spherical elements in the ball receiving cup, so that friction will occur between the balls and between the balls and the pipe. The friction coefficient of the graphite matrix spherical elements is large under helium, and the dust generated by friction may gradually accumulate in the ball receiving cup. In addition, there may be a small probability that fragments and debris will enter the ball receiving cup. For baffles with a small inclination angle installed horizontally due to installation space limitations, the dust and debris in the ball receiving cup cannot be discharged by gravity, and due to its flow blocking function, it is also difficult to remove dust and debris by pipeline purging. The continuously accumulated dust and debris will cause the spherical elements in the cup to be raised. Once the spherical crown of the spherical element in the ball receiving cup is higher than the cylindrical surface of the rotor, a jamming fault that is difficult to resolve will occur. Summary of the invention

[0004] The present invention provides a flow-blocking device for a ball bed high-temperature reactor, which is used to solve the defect that the rotor is easily stuck in the prior art, and achieves the following technical effects: the amount of waste accumulated in the ball receiving cup is greatly reduced, and the risk of rotor jamming due to the waste padding the spherical elements is reduced, thereby ensuring the smooth rotation of the rotor and further ensuring the long-term reliable operation of the flow-blocking device.

[0005] The flow blocking device of the pebble bed high temperature reactor according to an embodiment of the present invention comprises:

[0006] A mounting seat having a mounting cavity formed therein, the mounting seat also having a ball-in channel and a ball-out channel communicating with the mounting cavity;

[0007] A rotor is rotatably mounted in the mounting cavity, wherein the outer surface of the rotor is inwardly recessed to form at least one ball receiving cup, and the ball receiving cup is used to dock with any one of the goal channel and the ball outlet channel;

[0008] A material leakage hole is arranged on the inner wall of the ball receiving cup, and a waste material collecting chamber is formed inside the rotor. The waste material collecting chamber is connected to the ball receiving cup through the material leakage hole.

[0009] According to one embodiment of the present invention, the outer surface of the rotor is further provided with a discharge hole connected to the waste collection chamber, and the size of the discharge hole is smaller than the size of the spherical element in the ball channel;

[0010] The mounting seat is provided with a discharge channel, and the rotor rotates to drive the discharge hole to switch between a docking state and a blocking state. In the docking state, the discharge hole is docked with the discharge channel; in the blocking state, the inner wall of the mounting cavity blocks the discharge hole.

[0011] According to one embodiment of the present invention, a guide plate is provided between the leakage hole and the discharge hole;

[0012] In the docking state, the discharge hole is arranged lower than the leakage hole, and the guide plate extends obliquely downward from the bottom end of the leakage hole to the bottom end of the discharge hole.

[0013] According to one embodiment of the present invention, the flow blocking device of the pebble bed high temperature reactor further includes:

[0014] An air supply component, used for connecting to the goal channel or the ball outlet channel and supplying air thereto;

[0015] In the docking state, the ball receiving cup is docked with the ball scoring channel or the ball outlet channel, and the air supply assembly is connected to the ball receiving cup through the ball scoring channel or the ball outlet channel to blow the waste stored in the rotor out of the outlet channel.

[0016] According to one embodiment of the present invention, the discharge channel is connected to a waste collecting device, and the waste collecting device includes a waste conveying pipeline and a waste collector that are connected to each other.

[0017] According to one embodiment of the present invention, the waste collector is formed with a separation chamber, a debris collection chamber and a dust outlet, the top of the separation chamber is connected to the dust outlet, and a filter element for filtering debris is provided between the separation chamber and the dust outlet, and the bottom of the separation chamber is connected to the debris collection chamber.

[0018] According to one embodiment of the present invention, the waste conveying pipeline includes an external pipe joint, a guide pipe and a connecting pipe, a part of the guide pipe is built in and fixed in the external pipe joint, and another part of the guide pipe is built in and fixed in the discharge channel;

[0019] The outlet of the guide pipe is connected to the waste collector through the connecting pipe, and the end where the inlet of the guide pipe is located forms a cylindrical section matching the shape of the outer surface of the rotor, and the cylindrical section and the inner wall of the installation cavity are smoothly connected.

[0020] According to an embodiment of the present invention, in the docking state, the inlet of the flow guide pipe is docked with the discharge hole, and the shape of the inlet of the flow guide pipe matches the shape of the discharge hole.

[0021] According to an embodiment of the present invention, the leakage hole is arranged at the bottom of the ball receiving cup, and the bottom of the ball receiving cup is provided with a supporting member protruding from the bottom wall thereof.

[0022] According to one embodiment of the present invention, the mounting seat comprises a shell and an inner lining ring, the inner lining ring is fixed in the inner cavity of the shell, and the inner lining ring defines the mounting cavity;

[0023] The shell is provided with the goal channel, the ball outlet channel and the material outlet channel, and the lining ring is provided with a first through hole connected to the goal channel, a second through hole connected to the ball outlet channel and a third through hole connected to the material outlet channel.

[0024] According to one embodiment of the present invention, the number of the ball receiving cups is two, and correspondingly, the number of the waste collecting chambers is also two, and each of the ball receiving cups is provided with the leakage hole and is connected to the corresponding waste collecting chamber.

[0025] According to one embodiment of the present invention, the flow blocking device of the pebble bed high temperature reactor further includes:

[0026] A power assembly, used to drive the rotation of the rotor;

[0027] The power assembly includes a motor, a magnetic transmission and a coupling. The inner magnetic rotor of the magnetic transmission is adaptively connected to the rotating shaft of the rotor, the outer magnetic rotor of the magnetic transmission is connected to the coupling, and the coupling is connected to the output shaft of the motor.

[0028] In summary, the choke device provided by the present invention is applied to the ball bed high temperature pile. By setting a waste collection chamber on the rotor and a leakage hole connected to the waste collection chamber on the ball receiving cup, the debris and dust can be leaked into the waste collection chamber by utilizing the deadweight of the debris and dust and the rotation of the rotor. The volume of the waste collection chamber is much larger than the volume of the debris at the bottom of the ball receiving cup, thereby greatly reducing the risk of the waste accumulated in the ball receiving cup raising the spherical element and causing blockage. Through the guide pipe, the connecting pipe, the separator and the debris collection tank, the waste in the waste collection chamber can be purged to the separator by utilizing the air supply assembly connected to the ball path, and the debris can be collected in the debris collection tank. When the dust-containing gas passes through the filtering device later, the dust therein is intercepted and collected. Compared with the closest prior art, since the choke device of the present invention has a large chip capacity and an added debris purging function, the long-term reliable operation of the choke device can be ensured.

[0029] In addition, a support is provided at the bottom center of the ball receiving cup, so that the ball receiving cup can be made deeper, which can ensure that dust and debris can more fully enter between the spherical element and the bottom of the ball receiving cup, and then more smoothly leak into the waste collection chamber, thereby reducing the friction and grinding rate of the spherical element and the inner liner ring in the cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 creative work.

[0031] Figure 1 A cross-sectional schematic diagram of a flow blocking device of a pebble bed high temperature reactor provided by an embodiment of the present invention in a forward air supply state;

[0032] Figure 2 A three-dimensional schematic diagram of a flow blocking device for a pebble bed high temperature reactor provided by an embodiment of the present invention;

[0033] Figure 3 One of the schematic cross-sectional structures of the runner of the rotor provided in the embodiment of the present invention;

[0034] Figure 4 A three-dimensional schematic diagram of a rotor provided in an embodiment of the present invention;

[0035] Figure 5 A three-dimensional schematic diagram of a liner ring provided in an embodiment of the present invention;

[0036] Figure 6 A three-dimensional schematic diagram of a flow guide tube provided in an embodiment of the present invention;

[0037] Figure 7 A schematic cross-sectional view of a waste collector provided by an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of the cross-sectional structure of a rotor and a spherical element provided in an embodiment of the present invention;

[0039] Fig. 9 A schematic cross-sectional view of a flow blocking device of a pebble bed high temperature reactor provided by an embodiment of the present invention in a reverse air supply state;

[0040] Fig.10 The second schematic diagram of the three-dimensional cross-sectional structure of the runner of the rotor provided in the embodiment of the present invention;

[0041] Fig.11 A partial cross-sectional schematic diagram of the flow blocking device of the pebble bed high temperature reactor provided in an embodiment of the present invention in a forward air supply state.

[0042] Fig.12 A partial cross-sectional schematic diagram of the flow blocking device of the pebble bed high temperature reactor provided in an embodiment of the present invention under the reverse air supply state.

[0043] Reference numerals:

[0044] 1. Shell; 2. Rotor; 3. Liner ring; 4. Ball inlet pipe; 5. Ball outlet pipe; 6. Flow guide pipe; 7. External pipe joint; 8. Blind flange; 9. Connecting pipe; 10. Separator; 11. Debris collection tank; 12. Tube sheet; 13. Filter element; 14. Middle flange; 15. Magnetic actuator; 16. Motor; 17. Power assembly; 18. Separation chamber; 19. Debris collection chamber; 20. Dust outlet;

[0045] 21. ball receiving cup; 21a. first ball receiving cup; 21b. second ball receiving cup; 22a. first cup bottom; 22b. second cup bottom; 23. supporting member; 23a. first supporting member; 23b. second supporting member; 24. weight reducing groove; 24a. first weight reducing groove; 24b. second weight reducing groove; 25. guide plate; 25a. first guide plate; 25b. second guide plate; 26a. first rib plate; 26b. second rib plate; 27. waste collecting chamber; 27a. first waste collecting chamber; 27b. second waste collecting chamber; 28a. first semicircular hole; 28b. second semicircular hole; 29. ​​leakage hole; 29a. first leakage hole; 29b. second leakage hole; 30a. third semicircular hole; 30b. fourth semicircular hole;

[0046] 31. bottom surface of rotor; 32. limit groove; 33. rotating shaft; 34. first shaft block; 35. second shaft block; 36. rotating wheel; 37a. goal channel; 37b. ball outlet channel; 38. material outlet channel; 39a. first through hole; 39b. second through hole; 40. third through hole; 41. inner cylindrical surface; 42. cylindrical section; 43. retaining piece; 44. pipe rib; 45. inner pipe flow channel; 46a. fifth semicircular hole; 46b. sixth semicircular hole; 47. through hole; 48. separation chamber inlet; 49. separation chamber outlet; 50. fixing flange; 51. debris collection tank mouth; 52. bolt hole; 53. spherical element; 54. mounting chamber; 55. inlet end of external pipe joint; 56. outlet end of external pipe joint; 57. side pipe mouth; 58. retaining groove. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] The flow blocker used in the prior art for the pebble bed high temperature gas-cooled reactor only has the effect of guiding the material. When installed horizontally at a small inclination angle, it is unable to discharge the dust and debris in the receiving cup, causing the dust and debris to accumulate in the receiving cup, which easily causes the material entering the receiving cup to be raised and exceed the outer surface of the rotor, causing the rotor to be blocked by the material and unable to rotate. In order to solve the defects in the above-mentioned related art, an embodiment of the present invention provides a flow blocker for a pebble bed high temperature reactor, and the flow blocker for the pebble bed high temperature reactor of the present invention will be described in detail with reference to the accompanying drawings.

[0049] like Figures 1 to 12 As shown, the choke device of the pebble bed high temperature reactor according to an embodiment of the present invention includes a mounting seat (including a shell 1 and an inner liner ring 3 hereinafter) and a rotor 2 .

[0050] A mounting cavity 54 is formed inside the mounting seat, and the mounting seat is also provided with a ball-injection channel 37a and a ball-outlet channel 37b communicating with the mounting cavity 54.

[0051] The rotor 2 is rotatably mounted in the mounting cavity 54. The outer surface of the rotor 2 is recessed inward to form at least one ball receiving cup 21. The ball receiving cup 21 is used to dock with any one of the ball entry channel 37a and the ball exit channel 37b.

[0052] A leakage hole 29 is provided on the inner wall of the ball receiving cup 21 , and a waste collecting chamber 27 is formed inside the rotor 2 . The waste collecting chamber 27 is connected to the ball receiving cup 21 through the leakage hole 29 .

[0053] like Figure 1 As shown, according to one embodiment of the present invention, the number of ball receiving cups 21 is two, namely the first ball receiving cup 21a and the second ball receiving cup 21b. Correspondingly, the number of waste collecting chambers 27 is also two, namely the first waste collecting chamber 27a and the second waste collecting chamber 27b. Each ball receiving cup 21 is provided with a leakage hole 29 (i.e., the first leakage hole 29a or the second leakage hole 29b) and is connected to the corresponding waste collecting chamber 27. Of course, the present invention does not impose any special restrictions on the number of ball receiving cups 21 and waste collecting chambers 27.

[0054] like Figure 2 As shown, according to one embodiment of the present invention, the choke device of the pebble bed high temperature reactor further includes a power assembly 17. The power assembly 17 is used to drive the rotation of the rotor 2. The power assembly 17 includes a motor 16, a magnetic transmission 15 and a coupling, the inner magnetic rotor 2 of the magnetic transmission 15 is adaptively connected to the rotating shaft 33 of the rotor 2, the outer magnetic rotor 2 of the magnetic transmission 15 is connected to the coupling, and the coupling is connected to the output shaft of the motor 16.

[0055] like Figure 1 and Figure 2 As shown, according to the high-temperature flow-blocking device of the ball bed according to an embodiment of the present invention, its specific working process is as follows: in the process of the upstream component transporting the spherical element 53 to the goal channel 37a, the waste materials such as debris and dust generated by the upstream process will also follow the spherical element 53 into the goal channel 37a. At this time, the rotor 2 is in the initial position in the installation cavity 54 (at this time, the ball receiving cup 21 is connected to the goal channel 37a), and the material in the goal channel 37a enters the ball receiving cup 21, wherein the spherical element 53 in the material remains in the ball receiving cup 21, and the waste materials (such as debris and dust, etc.) in the material will leak into the waste collection cavity 27 inside the rotor 2 through the leakage hole 29 under the combined action of the dead weight of the waste materials and the centrifugal force generated by the rotor 2 during the rotation process, thereby avoiding the accumulation of waste materials in the ball receiving cup 21, ensuring that the height of the spherical element 53 in the ball receiving cup 21 is lower than the slot position of the ball receiving cup 21, thereby facilitating the smooth rotation of the rotor 2 in the installation cavity 54 and avoiding the rotor 2 from being stuck.

[0056] Subsequently, the power assembly 17 drives the rotor 2 to rotate in the mounting cavity 54, so that the ball receiving cup 21 containing the spherical element 53 docks with the ball outlet channel 37b. At this time, the spherical element 53 in the ball receiving cup 21 will smoothly enter the next process along the ball outlet channel 37b.

[0057] In summary, according to the choke device of the ball bed high temperature reactor according to the embodiment of the present invention, by arranging a waste collection chamber 27 on the rotor 2 and arranging a leakage hole 29 connected to the waste collection groove on the ball receiving cup 21, the dead weight of the waste (such as debris and dust) and the centrifugal force generated by the rotor 2 during the rotation process can be utilized to leak the debris and dust into the waste collection chamber 27. In this way, since the volume of the waste collection chamber 27 is much larger than the volume of the debris that can be accommodated at the bottom of the ball receiving cup 21, the amount of waste accumulated in the ball receiving cup 21 can be greatly reduced, and the risk of the rotor 2 being blocked due to the waste padding the spherical element 53 is reduced, thereby ensuring the smooth rotation of the rotor 2 and further ensuring the long-term reliable operation of the choke device.

[0058] For the flow blocking device proposed in the present invention, when the waste materials such as debris and dust in the waste collection chamber 27 need to be cleaned, a variety of discharge methods can be used to discharge the waste materials in the waste collection chamber 27. For example, an additional through hole is opened on the waste collection chamber 27 to connect the waste collection chamber 27 to the outside of the mounting seat, so that the waste materials in the waste collection chamber 27 can be discharged; for another example, the waste materials (such as debris and dust) are caused to flow back into the ball receiving cup 21 and are discharged along the ball outlet channel 37b by the dead weight of the waste materials (such as debris and dust) and the centrifugal force generated by the rotor 2 during the rotation process; for another example, a suction component is connected to the outlet of the ball outlet channel 37b or the outlet of the ball channel 37a, and the waste materials in the waste collection chamber 27 are extracted by suction.

[0059] Of course, the above embodiments are only some of the many embodiments of the present invention, and do not constitute a specific limitation on the discharge method of the present invention. The flow blocking device of the present invention can also adopt other discharge structures to realize the discharge of waste in the waste collection chamber 27, and the present invention does not make any limitation here.

[0060] According to one embodiment of the present invention, the outer surface of the rotor 2 is also provided with a discharge hole (including the first semicircular hole 28a, the second semicircular hole 28b, the third semicircular hole 30a and the fourth semicircular hole 30b hereinafter) connected to the waste collection chamber 27, and the mounting seat is provided with a discharge channel 38. The rotor 2 rotates to drive the discharge hole to switch between a docking state and a blocked state. In the docking state, the discharge hole is docked with the discharge channel 38; in the blocked state, the inner wall of the mounting cavity 54 blocks the discharge hole.

[0061] In this embodiment, the position of the discharge hole will change with the rotation of the rotor 2. When the discharge hole rotates to the position of the discharge channel 38, the discharge hole and the discharge channel 38 are docked and connected. At this time, the discharge hole is in a docking state. In this docking state, the waste in the waste collecting chamber 27 can enter the discharge channel 38 through the discharge hole, and finally be discharged out of the mounting seat along the discharge channel 38; when the discharge hole and the discharge channel 38 are staggered, the discharge hole is blocked by the inner wall of the mounting chamber 54. At this time, the discharge hole is in a blocked state. In this blocked state, the waste remains in the waste collecting chamber 27.

[0062] It should be noted that since the discharge hole may move to a position docking with the goal channel 37a during the rotation of the rotor 2, in order to prevent the spherical element 53 from passing through the discharge hole, the size of the discharge hole needs to be smaller than the size of the spherical element 53 in the goal channel 37a. In this way, even if the discharge hole moves to a position docking with the goal channel 37a, the spherical element 53 in the goal channel 37a will not fall into the waste collection chamber 27 through the discharge hole. At this time, the material entering the waste collection chamber 27 through the discharge hole only includes the waste in the goal channel 37a.

[0063] In some embodiments, the discharge hole may be an elliptical hole, a semicircular hole, or a polygonal hole, etc., and the present invention does not impose any special restrictions thereon, as long as the discharge hole cannot pass through the spherical element 53 in the ball channel 37a. Figure 3 and Figure 4 As shown, when there are two ball receiving cups 21, leakage holes 29, waste collection chambers 27 and discharge holes, one discharge hole includes a first semicircular hole 28a and a third semicircular hole 30a, and the first semicircular hole 28a and the third semicircular hole 30a are separated by a first rib 26a, and the other discharge hole includes a second semicircular hole 28b and a fourth semicircular hole 30b, and the second semicircular hole 28b and the fourth semicircular hole 30b are separated by a second rib 26b.

[0064] like Figure 1 As shown, according to one embodiment of the present invention, in the docking state, the discharge hole is arranged lower than the leakage hole 29.

[0065] Thus, due to the height difference between the discharge hole and the leakage hole 29 , the waste entering the waste collecting chamber 27 from the leakage hole 29 falls to the discharge hole under its own gravity, thereby facilitating the waste to be discharged from the discharge hole along the discharge channel 38 .

[0066] like Figure 1 As shown, further, a guide plate 25 is provided between the leakage hole 29 and the discharge hole. In the docking state, the discharge hole is arranged below the leakage hole 29, and the guide plate 25 extends downwardly from the bottom end of the leakage hole 29 to the bottom end of the discharge hole.

[0067] In this way, the guide plate 25 can play a guiding role in the process of waste movement, and the guide plate 25 arranged obliquely downward can further ensure the smooth movement of the waste, so that the waste can slide smoothly from the leakage hole 29 to the discharge hole.

[0068] like Figure 1 As shown, according to one embodiment of the present invention, a weight-reducing groove 24 is further provided inside the rotor 2 on the other side of the guide plate 25, that is, a cavity is formed inside the rotor 2 and the guide plate 25 divides the cavity into the weight-reducing groove 24 and the waste collection chamber 27, and at this time the guide plate 25 also acts as a partition, wherein the provision of the weight-reducing groove 24 can save the material cost of the rotor 2 and reduce the overall weight of the rotor 2.

[0069] like Figure 1 As shown, according to one embodiment of the present invention, the mounting seat includes a shell 1 and an inner lining ring 3 , the inner lining ring 3 is fixed in the inner cavity of the shell 1 , and the inner lining ring 3 defines a mounting cavity 54 .

[0070] Of course, the mounting seat may not include the liner ring 3, but the rotor 2 may be mounted only through the housing 1. It should be noted that, in the case of the liner ring 3, the "inner wall of the mounting cavity 54" mentioned in the context of the present invention refers to the inner wall of the liner ring 3; in the case of the mounting seat not including the liner ring 3, the "inner wall of the mounting cavity 54" mentioned in the context of the present invention refers to the inner wall of the housing 1.

[0071] like Figure 1 and Figure 5 As shown, in the case where the mounting seat includes a shell 1 and an inner lining ring 3, the shell 1 is provided with a ball scoring channel 37a, a ball outlet channel 37b and a material outlet channel 38, and the inner lining ring 3 is provided with a first through hole 39a connected to the ball scoring channel 37a, a second through hole 39b connected to the ball outlet channel 37b and a third through hole 40 connected to the material outlet channel 38.

[0072] In this embodiment, the process of the spherical element 53 entering and exiting the ball is as follows: the spherical element 53 enters the ball-entering channel 37a, and then enters the ball-receiving cup 21 through the first through hole 39a. The rotor 2 rotates so that the ball-receiving cup 21 docks with the ball-exiting channel 37b, and the spherical element 53 enters the ball-receiving channel through the second through hole 39b, and finally enters the next process.

[0073] The waste discharge process is as follows: the waste enters the goal channel 37a, and then enters the ball receiving cup 21 through the first through hole 39a. The waste in the ball receiving cup 21 enters the waste collecting chamber 27 through the leakage hole 29. When the rotor 2 rotates to the first discharge hole and docks with the first discharge channel 38, the waste in the waste collecting chamber 27 is discharged in turn through the discharge hole, the third through hole 40 and the discharge channel 38.

[0074] Furthermore, in order to improve the efficiency of waste discharge, the outlet of the first discharge channel 38 can be connected to a suction component to extract the waste from the waste collection chamber 27; or, the inlet of the ball channel 37a or the outlet of the ball outlet channel 37b can be connected to an air supply component to blow and discharge the waste in the waste collection chamber 27.

[0075] In a specific embodiment, the flow blocking device further includes an air supply assembly (not shown in the figure). The air supply assembly is used to connect to the goal channel 37a or the ball outlet channel 37b and supply air thereto.

[0076] In the docking state, the ball receiving cup 21 is docked with the ball scoring channel 37a or the ball discharging channel 37b, and the air supply assembly is connected to the ball receiving cup 21 through the ball scoring channel 37a or the ball discharging channel 37b to blow the waste stored in the rotor 2 to the outside of the discharging channel 38.

[0077] For example Figure 1 As shown, the included angles between the discharge channel 38 and the goal channel 37a and the ball outlet channel 37b (that is, the included angle between the central axes of the two channels) are ninety degrees, and the included angle between the central axis of the ball receiving cup 21 and the central axis of the discharge hole is also ninety degrees, and the included angles between the third through hole 40 and the first through hole 39a and the second through hole 39b are also ninety degrees. Therefore, when any one of the goal channel 37a and the ball outlet channel 37b is docked with the ball receiving cup 21, the discharge hole is docked with the discharge channel 38 through the third through hole 40. At this time, the air supply component can be connected to the goal channel 37a for blowing, and can also be connected to the ball outlet channel 37b for blowing.

[0078] According to one embodiment of the present invention, the discharge channel 38 is connected to a waste collection device, and the waste collection device includes a waste conveying pipeline and a waste collector that are connected to each other.

[0079] In this way, the discharged waste can be collected by the waste collection device, thereby preventing the waste from polluting the air environment, and the waste can be recycled and reused through the collection of the waste, which is more environmentally friendly. Specifically, the waste enters the waste conveying pipeline from the discharge channel 38 and finally gathers in the waste collector.

[0080] It should be noted that the present invention does not specifically limit the specific structure of the waste collection device. As long as the waste collection device can collect waste, the embodiments of the waste collection device introduced below are only for illustration and do not constitute a specific limitation on the present invention.

[0081] like Figure 7As shown, according to one embodiment of the present invention, the waste collector is formed with a separation chamber 18, a debris collection chamber 19 and a dust outlet 20, the top of the separation chamber 18 is connected to the dust outlet 20, and a filter element 13 for filtering debris is provided between the separation chamber 18 and the dust outlet 20, and the bottom of the separation chamber 18 is connected to the debris collection chamber 19.

[0082] Since waste materials are usually composed of dust and debris, if the structure of the waste collector in the above embodiment is adopted, the debris will be deposited in the debris collection chamber 19, and the dust will be blown out of the dust outlet 20 along with the air flow of the air supply component. Among them, the filter element 13 can be a filter screen or activated carbon, etc., and further, the filter element 13 can also be a filter structure with dust adsorption function, so as to prevent dust from being directly discharged into the air to pollute the environment.

[0083] like Figure 1 , Figure 6 and Fig.11 As shown, according to one embodiment of the present invention, the waste conveying pipeline includes an external pipe joint 7, a guide pipe 6 and a connecting pipe 9, a part of the guide pipe 6 is built in and fixed in the external pipe joint 7, and another part of the guide pipe 6 is built in and fixed in the discharge channel 38.

[0084] The outlet of the flow guide pipe 6 is connected to the waste collector through the connecting pipe 9 , and the inlet end of the flow guide pipe 6 forms a cylindrical section 42 matching the outer surface shape of the rotor 2 , and the cylindrical section 42 and the inner wall of the installation cavity 54 are smoothly connected.

[0085] In this embodiment, the external pipe joint 7 mainly plays the role of fixing and transition, and the guide pipe 6 and the connecting pipe 9 mainly play the role of conveying waste. In this embodiment, by designing the end face of the inlet end of the guide pipe 6 as a cylindrical section 42, it is convenient for the guide pipe 6 to extend into the installation cavity 54 and smoothly connect with the inner wall of the installation cavity 54. In this way, when the discharge hole is in a docking state, the guide pipe 6 can be directly docked with the discharge hole, thereby avoiding leakage and other losses of waste during the discharge of the discharge hole.

[0086] In addition, the present invention does not specifically limit the specific installation structure used when the flow guide pipe 6 is fixed to the external pipe joint 7 and the discharge channel 38. For example, Figure 6 and Fig.11 As shown, a retaining piece 43 is formed at the outlet end of the flow guide pipe 6 , and the retaining piece 43 is fixed in the retaining groove 58 of the external pipe joint 7 through a blind flange 8 .

[0087] Furthermore, in the docking state, the inlet of the guide tube 6 is docked with the discharge hole, and the shape of the inlet of the guide tube 6 matches the shape of the discharge hole. In this way, it is ensured that the waste discharged from the discharge hole can smoothly enter the guide tube 6. Figure 6 As shown, the inlet of the guide tube 6 includes a fifth semicircular hole 46a and a sixth semicircular hole 46b, which are separated by a tube rib 44, and in the docking state, the fifth semicircular hole 46a and the sixth semicircular hole 46b correspond to the first semicircular hole 28a and the third semicircular hole 30a respectively.

[0088] like Figure 8 As shown, according to one embodiment of the present invention, the leakage hole 29 is provided at the bottom of the ball receiving cup 21, and the bottom of the ball receiving cup 21 is provided with a support member 23 protruding from the bottom wall thereof. In this way, after entering the ball receiving cup 21, the spherical element 53 leans against the upper end surface of the support member 23, thereby being supported by the support member 23. At this time, there is a certain chip space at the bottom of the ball receiving cup 21, which facilitates the waste to enter the waste collection chamber 27 through the chip space.

[0089] A specific embodiment of the flow blocking device for a pebble bed high temperature reactor according to the present invention is described below with reference to the accompanying drawings.

[0090] like Figures 1 to 12 As shown, Figure 1 The cross-sectional structure diagram of the flow blocking device of the present invention applied to a pebble bed high temperature reactor is shown. Figure 2 FIG. 1 is a schematic diagram of the installation position of a preferred embodiment of the flow blocking device of the present invention, as shown in FIG. Figure 1 and Figure 2 As shown, the flow blocking device includes: a shell 1, a rotor 2, an inner liner ring 3, a ball inlet pipe 4, a ball outlet pipe 5, a guide pipe 6, an external pipe joint 7, a blind flange 8, a connecting pipe 9, a separator 10, a debris collection tank 11, a tube sheet 12, a filter element 13, a middle flange 14 and a power assembly 17.

[0091] The housing 1 is provided with a goal channel 37a, a ball outlet channel 37b, a material outlet channel 38 and an installation cavity 54; the goal pipe 4 and the ball outlet pipe 5 are respectively connected to the goal channel 37a and the ball outlet channel 37b on the housing 1; the external pipe joint 7 is connected to the material outlet channel 38 on the housing 1. The middle flange 14 is connected to the housing 1 through fasteners and seals. The magnetic actuator 15 of the power assembly 17 is connected to the middle flange 14 through fasteners and seals. In summary, the overall structure of the housing 1, the goal pipe 4, the ball outlet pipe 5, the middle flange 14 and the magnetic actuator 15 together constitute the main pressure-bearing boundary of the flow-blocking device.

[0092] The inner lining ring 3 is fixed in the shell 1 and together with the shell 1 forms an installation cavity 54, and a first through hole 39a, a second through hole 39b and a third through hole 40 are provided on the inner lining ring 3, wherein the first through hole 39a and the second through hole 39b are coaxially and equidiametrically connected to the ball ball channel 37a and the ball outlet channel 37b of the shell 1 respectively, and the third through hole 40 is coaxially and equidiametrically connected to the discharge channel 38 on the shell 1.

[0093] The rotor 2 is provided with a rotating shaft 33, a rotating wheel 36, a first pillow block 34, a second pillow block 35, a first ball receiving cup 21a, and a second ball receiving cup 21b. The rotor 2 is placed in the inner liner ring 3, and is connected to the middle flange 14 through the bearing on the first pillow block 34, and is connected to the mounting cavity 54 of the housing 1 through the bearing on the second pillow block 35. The ball-in-ball channel 37a and the ball-out-ball channel 37b of the housing 1 are coaxial with equal diameters, and the first ball-in-ball cup 21a and the second ball-in-ball cup 21b of the rotor 2 are coaxial with each other in the opposite direction, and each ball-in-ball cup has an effective height slightly larger than that of a spherical element. For example, after the first ball-in-ball cup 21a is connected to a spherical element 53, the rotor 2 rotates 180° under the drive of the power assembly 17, that is, when the first ball-in-ball cup 21a is connected to the ball-out-ball channel 37b of the housing 1, the spherical element 53 is discharged from the flow-blocking device through the second through hole 39b of the inner liner ring 3, the ball-out-ball channel 37b of the housing 1, and the ball-out-ball pipe 5 by gravity.

[0094] When the horizontal inclination angle of the flow blocking device is small, such as Figure 2 In the installation position, due to the interception effect of the ball cup, the debris and dust generated by the friction and collision of the spherical element will accumulate in the ball cup. Unlike the favorable geometric shape of the spherical element, it is difficult for the dust and debris to be discharged from the ball cup at a small inclination angle. In the prior art, the baffle rotor relies on the cylindrical surface and conical surface of the ball cup to support the spherical element. When the horizontal inclination angle of the installation is small, the conical surface of the ball cup will be higher than the cylindrical surface. Dust and debris cannot enter the small holes under the conical surface, but accumulate on the conical surface or the cylindrical surface, which can easily raise the spherical element and cause blockage. In the embodiment of the present invention, the bottom of the first ball cup 21a and the second ball cup 21b of the baffle device rotor 2 are respectively provided with a first support member 23a and a second support member 23b, such as Figure 8 As shown, after the spherical element 53 enters the ball receiving cup, it is supported by the first supporting member 23a or the second supporting member 23b, and there is a certain chip space at the bottom of the ball receiving cup 21. Therefore, the flow blocking device of the present invention has higher reliability than the prior art.

[0095] In the embodiment of the present invention, the rotor 2 is further provided with a weight reduction groove 24, a guide plate 25, a first rib plate 26a, a second rib plate 26b and a discharge hole, and the ball receiving cup 21 of the rotor 2 is further provided with a leakage hole 29. The purpose of providing the weight reduction groove 24 is to reduce the inertia of the rotor 2, so as to reduce the movement impact of the rotor 2 and ensure its service life. Figure 3 As shown, the first guide plate 25a divides the first weight-reducing groove 24a into a first waste collection chamber 27a, and the first leakage hole 29a and the first semicircular hole 28a of the first ball receiving cup 21a are connected to the first waste collection chamber 27a in sequence; in fact, Figure 4It can be seen that there are a first semicircular hole 28a and a third semicircular hole 30a at 90° on the left side of the first ball receiving cup 21a, with a first rib plate 26a disposed therebetween. On the other side, the second guide plate 25b divides the second weight reduction groove 24b into a second waste collection chamber 27b, and the second leakage hole 29b, the second semicircular hole 28b and the fourth semicircular hole 30b are connected to the second waste collection chamber 27b. The purpose of dividing the discharge hole by the rib plate is mainly to ensure that during the rotation of the rotor 2, the nearest spherical element 53 that has not entered the ball receiving cup 21 in the ball string will not fall into the through hole on the rotor surface connected to the first waste collection chamber 27a, so as to avoid unnecessary movement of the ball string.

[0096] After dust and debris enter the first cup bottom 22a of the first ball receiving cup 21a, during the rotation process, the dust and debris leak into the first waste collection chamber 27a through the first leakage hole 29a. When the dust and debris accumulated in the first waste collection chamber 27a exceed the crescent surface of the first semicircular hole 28a, as the rotor 2 rotates, the first ball receiving cup 21a rotates to the second through hole 39b of the liner ring 3, and the dust and debris may be discharged to the ball outlet channel 37b of the housing 1, and then sent to the downstream pipeline under the push of the subsequent spherical element 53. It can be understood that the situation in which dust and debris enter the second cup bottom 22b of the second ball receiving cup 21b is similar to the above situation, and will not be repeated here.

[0097] The inlet end 55 of the external pipe joint is connected to the discharge channel 38 of the shell 1, and the flow guide pipe 6 is placed in the external pipe joint 7, passes through the discharge channel 38 of the shell 1, and extends into the third through hole 40 of the liner ring 3. Figure 6 As shown, the guide tube 6 includes a cylindrical section 42, a stopper 43, a tube rib 44, an inner tube flow channel 45, a fifth semicircular hole 46a, a sixth semicircular hole 46b and a through hole 47. During assembly, the stopper 43 cooperates with the stopper groove 58 located at the outlet end 56 of the external pipe joint, and the cylindrical section 42 is smoothly connected and cooperated with the inner cylindrical surface 41 of the inner liner ring 3 to ensure smooth rotation of the rotor 2. The function of the tube rib 44 is similar to that of the first rib 26a and the second rib 26b of the rotor 2, that is, when the spherical element 53 rotates with the rotor 2, it prevents the spherical element 53 from entering the inner tube flow channel 45. In addition, the through hole 47 of the guide tube 6 is in the same direction as the side pipe opening 57 of the external pipe joint 7, as shown in FIG. Fig.11 The blind flange 8 seals the fixed flow guide pipe 6 in the external pipe joint 7 through the sealing member and the fastener.

[0098] One end of the connecting pipe 9 is connected to the side pipe port 57 of the external pipe joint 7, and the other end thereof is connected to the separation chamber inlet 48 of the separator 10. Figure 7The separator 10 is provided with a separation chamber 18, a separation chamber inlet 48 and a separation chamber outlet 49. The debris collection tank 11 is connected to the separation chamber outlet 49 of the separator 10 through a fixing flange 50, and the tube sheet 12 is connected to the separator 10 through a fastener and a seal including a bolt hole 52. The tube sheet 12 is provided with a dust outlet 20, and a filter element 13 is provided in the separator 10 and below the tube sheet 12.

[0099] Due to the small inclination angle of horizontal installation, the excessive dust and debris accumulated in the first waste collection chamber 27a cannot be effectively discharged from the first semicircular hole 28a to the outlet pipe, and the debris discharged to the outlet pipe may block the pipe and cause blockage. Therefore, an air flow passage is formed by the guide pipe 6, the connecting pipe 9 and the separator 10. After the spherical element 53 in the flow blocking device and the ball pipe 4 is emptied, the air supply component connected to the upstream of the ball pipe 4 can be used for gas purging, such as Figure 1 and Figure 2 The air supply airflow passes through the ball pipe 4, the ball channel 37a, the first through hole 39a, the ball receiving cup 21a, the leakage hole 29a, the waste collection chamber 27a, the first circular hole 28a and the third semicircular hole 30a, the inner tube flow channel 45, the through hole 47, the connecting pipe 9 and the separation chamber inlet 48, carrying the dust and debris in the first waste collection chamber 27a into the separation chamber 18 of the separator 10. After the debris is intercepted by the filter element 13, it falls into the debris collection chamber 19 of the debris collection tank 11 through the separation chamber outlet 49 and the debris collection tank port 51 of the debris collection tank 11 for temporary storage. The dust-containing airflow passes through the filter element 13 and the dust outlet 20 of the tube plate 12, flows to the filter device supporting the air supply assembly, and is intercepted and contained after high-precision filtration.

[0100] Fig. 9 It is a schematic diagram of reverse air supply from the ball outlet pipe 5, at which time the first ball receiving cup 21a rotates 90 degrees and faces the third through hole 40 of the inner liner ring 3. The reverse air supply airflow passes through the ball outlet pipe 5, the ball outlet channel 37b, the second through hole 39b, the first semicircular hole 28a and the third semicircular hole 30a, the waste collection chamber 27a, the leakage hole 29a, the first ball receiving cup 21a, the inner tube flow channel 45, the through hole 47, the connecting pipe 9 and the separation chamber inlet 48, and carries the dust and debris in the first waste collection chamber 27a into the separation chamber 18 of the separator 10. After the debris is intercepted by the filter element 13, it falls into the debris collection chamber 19 of the debris collection tank 11 through the separation chamber outlet 49 and the debris collection tank port 51 for temporary storage, and the dust-containing airflow passes through the filter element 13 and the dust outlet 20 of the tube plate 12, and flows to the filter device supporting the air supply assembly, so that it is intercepted and contained after high-precision filtration.

[0101] Furthermore, a limiting post (not shown) is provided on the housing 1, and a limiting groove 32 is provided on the bottom surface of the rotating wheel 36 of the rotor 2. The device can ensure accurate alignment of the ball receiving cup 21 and the housing channel through the cooperation of the limiting groove 32 of the rotor 2 and the limiting post of the housing 1, so as to ensure smooth in and out of the ball and in and out of the air.

[0102] Furthermore, the power assembly 17 includes a magnetic transmission 15 and a motor 16, and the inner magnetic rotor of the magnetic transmission 15 is adaptively connected to the rotating shaft 33 of the rotor 2. An isolation cover is provided between the inner magnetic rotor and the outer magnetic rotor of the magnetic transmission 15, and a complete pressure-bearing boundary is formed by the isolation cover, the middle flange 14, the housing 1, and the fasteners and seals connected therebetween, so as to realize the bridging function under pressure conditions and ensure 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 33, and the connection between the outer magnetic rotor and the coupling, based on the magnetic push-pull effect of the outer magnetic rotor on the inner magnetic rotor, the power of the motor 16 is transmitted to the rotor 2 through non-contact transmission, thereby realizing a fully sealed transmission in the sealed space.

[0103] In summary, the choke device provided by the present invention is applied to a ball bed high temperature reactor. By arranging a waste collecting chamber 27 on the rotor 2 and arranging a leakage hole 29 connected to the waste collecting chamber 27 on the ball receiving cup 21, the debris and dust can be leaked into the waste collecting chamber 27 by utilizing the dead weight of the debris and dust and the rotation of the rotor 2. The volume of the waste collecting chamber 27 is much larger than the volume of the chips at the bottom of the ball receiving cup 21, thereby greatly reducing the risk of the waste accumulated in the ball receiving cup 21 raising the spherical element 53 and causing blockage. Through the guide pipe 6, connecting pipe 9, separator 10 and debris collection tank 11, the air supply assembly connected to the ball path can be used to blow the waste in the waste collection chamber 27 to the separator 10, and the debris can be collected in the debris collection tank 11. When the dust-containing gas passes through the filtering device later, the dust therein is intercepted and collected. Compared with the closest prior art, the flow blocking device of the present invention has a large chip holding capacity and an added debris blowing function, so the long-term reliable operation of the flow blocking device can be guaranteed.

[0104] In addition, a support member 23 is provided at the bottom center of the ball receiving cup 21, so that the ball receiving cup 21 can be made deeper, which can ensure that dust and debris can more fully enter between the spherical element 53 and the bottom of the ball receiving cup 21, and then more smoothly leak into the waste collection chamber 27, thereby reducing the friction and grinding rate between the spherical element 53 and the inner liner ring 3 in the cup.

[0105] 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 embodiments of the present invention.

Claims

1. A flow blocking device for a pebble bed high temperature reactor, characterized in that: include: A mounting seat having a mounting cavity formed therein, the mounting seat also having a ball-in channel and a ball-out channel communicating with the mounting cavity; A rotor is rotatably mounted in the mounting cavity, wherein the outer surface of the rotor is inwardly recessed to form at least one ball receiving cup, and the ball receiving cup is used to dock with any one of the goal channel and the ball outlet channel; A leakage hole is provided on the inner wall of the ball receiving cup, a waste collecting chamber is formed inside the rotor, and the waste collecting chamber is connected to the ball receiving cup through the leakage hole; The outer surface of the rotor is also provided with a discharge hole connected to the waste collection chamber, and the size of the discharge hole is smaller than the size of the spherical element in the ball channel; The mounting seat is provided with a discharge channel, and the rotor rotates to drive the discharge hole to switch between a docking state and a blocking state. In the docking state, the discharge hole is docked with the discharge channel; in the blocking state, the inner wall of the mounting cavity blocks the discharge hole; A guide plate is provided between the leakage hole and the discharge hole; In the docking state, the discharge hole is arranged lower than the leakage hole, and the guide plate extends obliquely downward from the bottom end of the leakage hole to the bottom end of the discharge hole.

2. The flow blocking device of the pebble bed high temperature reactor according to claim 1, characterized in that: Also includes: An air supply component, used for connecting to the goal channel or the ball outlet channel and supplying air thereto; In the docking state, the ball receiving cup is docked with the ball scoring channel or the ball outlet channel, and the air supply assembly is connected to the ball receiving cup through the ball scoring channel or the ball outlet channel to blow the waste stored in the rotor out of the outlet channel.

3. The flow blocking device of the pebble bed high temperature reactor according to claim 2, characterized in that: The discharge channel is connected to a waste collecting device, and the waste collecting device includes a waste conveying pipeline and a waste collector which are connected to each other.

4. The flow blocking device of the pebble bed high temperature reactor according to claim 3, characterized in that: The waste collector is formed with a separation chamber, a debris collection chamber and a dust outlet, the top of the separation chamber is connected to the dust outlet, and a filter element for filtering debris is provided between the separation chamber and the dust outlet, and the bottom of the separation chamber is connected to the debris collection chamber.

5. The flow blocking device of the pebble bed high temperature reactor according to claim 3, characterized in that: The waste conveying pipeline includes an external pipe joint, a guide pipe and a connecting pipe, a part of the guide pipe is built in and fixed in the external pipe joint, and another part of the guide pipe is built in and fixed in the discharge channel; The outlet of the guide pipe is connected to the waste collector through the connecting pipe, and the end where the inlet of the guide pipe is located forms a cylindrical section matching the shape of the outer surface of the rotor, and the cylindrical section and the inner wall of the installation cavity are smoothly connected.

6. The flow blocking device for a pebble bed high temperature reactor according to claim 5, characterized in that: In the docking state, the inlet of the guide tube is docked with the discharge hole, and the shape of the inlet of the guide tube matches the shape of the discharge hole.

7. The flow blocking device for a pebble bed high temperature reactor according to claim 1, characterized in that: The material leakage hole is arranged at the bottom of the ball receiving cup, and the bottom of the ball receiving cup is provided with a supporting member protruding from the bottom wall thereof.

8. The flow blocking device of a pebble bed high temperature reactor according to any one of claims 1 to 7, characterized in that: The mounting seat comprises a shell and an inner lining ring, wherein the inner lining ring is fixed in the inner cavity of the shell and defines the mounting cavity; The shell is provided with the goal channel, the ball outlet channel and the material outlet channel, and the lining ring is provided with a first through hole connected to the goal channel, a second through hole connected to the ball outlet channel and a third through hole connected to the material outlet channel.

9. The flow blocking device of a pebble bed high temperature reactor according to any one of claims 1 to 7, characterized in that: The number of the ball receiving cups is two, and correspondingly, the number of the waste collecting chambers is also two. Each of the ball receiving cups is provided with the leakage hole and is connected to the corresponding waste collecting chamber.

10. The flow blocking device of a pebble bed high temperature reactor according to any one of claims 1 to 7, characterized in that: Also includes: A power assembly, used to drive the rotation of the rotor; The power assembly includes a motor, a magnetic transmission and a coupling. The inner magnetic rotor of the magnetic transmission is adaptively connected to the rotating shaft of the rotor, the outer magnetic rotor of the magnetic transmission is connected to the coupling, and the coupling is connected to the output shaft of the motor.

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