Fuel lifting device

Abstract

The present invention discloses a fuel lifting device, which comprises a fixed base, a first ball bucket group, a first limiting assembly, a sliding base, a second ball bucket group and a second limiting assembly, wherein the first ball bucket group comprises a plurality of first ball buckets arranged at intervals in a vertical direction, the first ball buckets are rotatably connected to the fixed base, the first limiting assembly is connected to the fixed base, the first end of the first ball bucket is located in the corresponding first limiting assembly, the sliding base is connected to the fixed base and is slidable in a vertical direction, the second ball bucket group comprises a plurality of second ball buckets, the plurality of second ball buckets are alternately distributed with the plurality of first ball buckets, the second ball buckets are rotatably connected to the sliding base, the second limiting assembly is connected to the sliding base, and the first end of the second ball bucket is located in the corresponding second limiting assembly. The present invention mechanically lifts the fuel element in a short distance by setting the sliding base, the first ball bucket group and the second ball bucket group, thereby avoiding the problems of unstable motion and low efficiency caused by long-distance driving.

Description

Technical Field

[0001] The invention belongs to the technical field of reactor engineering, and in particular relates to a fuel lifting device. Background Art

[0002] The pebble bed high temperature gas-cooled reactor adopts a fuel management method of continuous loading and unloading. The reactivity loss caused by fuel consumption is adjusted and compensated by the loading and unloading of fuel balls. The high temperature gas-cooled reactor fuel loading and unloading system performs the function of non-stop reactor fuel replacement and is a key system to ensure the long-term safe and stable operation of the high temperature gas-cooled reactor.

[0003] In the related technology, the fuel loading and unloading system of the high temperature gas-cooled reactor uses gravity and pneumatic methods to transport and load and unload fuel elements. The former uses the favorable geometric shape of spherical fuel elements and relies on gravity to transport them from top to bottom in vertical or inclined pipes, while the latter relies on a pneumatic lifting system to transport fuel elements from bottom to top. This pneumatic lifting method has a complex system, low lifting efficiency, and the airflow has disturbance problems on the core coolant. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, an embodiment of the present invention provides a fuel lifting device, which converts the elevation of the fuel ball into the reciprocating motion of the driving mechanism, has a short motion stroke, and avoids the problems of unstable motion and low efficiency caused by long-range driving. At the same time, the fuel lifting device will not cause adverse effects on the components or other objects in the core through mechanical lifting.

[0005] The fuel lifting device of the embodiment of the present invention includes a fixed base, a first ball bucket group, a first limiting assembly, a sliding base, a second ball bucket group and a second limiting assembly, the first ball bucket group includes a plurality of first ball buckets, the plurality of first ball buckets are arranged at intervals in the vertical direction, the first ball bucket is rotatably connected to the fixed base, the first limiting assembly is connected to the fixed base, there are a plurality of first limiting assemblies, the plurality of first limiting assemblies correspond one to one to the plurality of first ball buckets, the first end of the first ball bucket is located in the corresponding first limiting assembly, the sliding base is connected to the fixed base and can slide in the vertical direction, The second ball bucket group includes multiple second ball buckets, and the multiple second ball buckets correspond one-to-one to the multiple first ball buckets. The second ball buckets are rotatably connected to the sliding base, and at least part of the projection of the second ball bucket on the horizontal plane overlaps with at least part of the projection of the first ball bucket on the horizontal plane. The second limit assembly is connected to the sliding base, and there are multiple second limit assemblies, and the multiple second limit assemblies correspond one-to-one to the multiple second ball buckets. The first end of the second ball bucket is located in the corresponding second limit assembly. In the initial position, the multiple second ball buckets and the multiple first ball buckets are alternately distributed in the vertical direction.

[0006] The fuel lifting device in the embodiment of the present invention mechanically lifts the fuel elements by setting up a sliding base, a first ball bucket group and a second ball bucket group, without causing adverse effects on components or other objects in the core. In addition, the reciprocating motion stroke of the sliding base is short, avoiding the problems of unstable motion and low efficiency caused by long-range driving.

[0007] In some embodiments, the fuel lifting device also includes a retaining ring, the first ball bucket located at the bottom is a scoring ball bucket, the first ball bucket located at the top is a ball unloading ball bucket, the first ball buckets located between the scoring ball bucket and the ball unloading ball bucket are both transfer ball buckets, and the retaining ring is connected to the first end of the scoring ball bucket.

[0008] In some embodiments, the first limiting assembly corresponding to the transfer ball bucket includes a first block rod and a second block rod, and the first limiting assembly corresponding to the goal ball bucket and the ball unloading bucket includes a second block rod, the second block rod is located below the corresponding first ball bucket, and the first block rod is located above the corresponding first ball bucket; the second limiting assembly includes a third block rod, a fourth block rod and a ball blocking block rod, the third block rod is located below the corresponding second ball bucket, the fourth block rod is located above the corresponding second ball bucket, and the ball blocking block rod is located above the corresponding fourth block rod.

[0009] In some embodiments, the fuel lifting device also includes a first shaft and a second shaft, the first shaft is connected to the fixed base, there are multiple first shafts, the multiple first shafts correspond one-to-one to the multiple first ball buckets, and the first ball buckets are rotatably connected to the corresponding first shafts, and the second shaft is connected to the sliding base, there are multiple second shafts, the multiple second shafts correspond one-to-one to the multiple second ball buckets, and the second ball buckets are rotatably connected to the corresponding second shafts.

[0010] In some embodiments, the first ball bucket includes a first connecting member, a first rod and a second rod, the first connecting member is rotatably connected to the first axis, the middle part of the first rod is connected to the first end of the first connecting member, the middle part of the second rod is connected to the second end of the second connecting member, the maximum distance between the first rod and the second rod is less than the diameter of the fuel ball, and the first end of the first rod and the first end of the second rod are both located in the first limiting assembly; the second ball bucket includes a second connecting member, a third rod and a fourth rod, the second connecting member is rotatably connected to the second axis, the middle part of the third rod is connected to the first end of the second connecting member, the middle part of the fourth rod is connected to the second end of the second connecting member, the maximum distance between the third rod and the fourth rod is less than the diameter of the fuel ball, and the first end of the third rod and the first end of the fourth rod are both located in the second limiting assembly.

[0011] In some embodiments, the first ball bucket also includes two first lap joints, one of which is connected to the second end of the first rod, and the other of which is connected to the second end of the second rod; the second ball bucket also includes two second lap joints, one of which is connected to the second end of the third rod, and the other of which is connected to the second end of the fourth rod, and at least part of the projection of the first lap joint on the horizontal plane overlaps with at least part of the projection of the second lap joint on the horizontal plane.

[0012] In some embodiments, the first rod is parallel to the second rod, and the third rod is parallel to the fourth rod.

[0013] In some embodiments, the fuel lifting device further includes a lubricating member, and the lubricating member is provided at the connection between the fixed base and the sliding base, at the connection between the first shaft and the first connecting member, and at the connection between the second shaft and the second connecting member.

[0014] In some embodiments, the lubricating element is a molybdenum disulfide film, or the lubricating element is a vacuum-coated carbon film.

[0015] In some embodiments, the fixed base has a goal tube and a ball outlet tube, the first end of the goal tube is connected to the side wall of the fixed base and corresponds to the first ball bucket located at the bottom, the goal tube is inclined upward in the direction from the first end to the second end, the goal tube is connected to the upstream pipeline to transport fuel balls into the goal tube, the first end of the ball outlet tube is connected to the side wall of the fixed base and corresponds to the first ball bucket located at the top, the ball outlet tube is inclined downward in the direction from the first end to the second end, and the ball outlet tube is connected to the downstream pipeline to transport fuel balls to the downstream pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the initial state of the fuel lifting device according to the embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the first stage of a fuel lifting device according to an embodiment of the present invention.

[0018] Figure 3 Schematic diagram of the second stage of the fuel lifting device according to an embodiment of the present invention.

[0019] Figure 4 Schematic diagram of the third stage of the fuel lifting device according to an embodiment of the present invention.

[0020] Figure 5 Schematic diagram of the fourth stage of the fuel lifting device according to an embodiment of the present invention.

[0021] Figure 6 Schematic diagram of the fifth stage of the fuel lifting device according to an embodiment of the present invention.

[0022] Figure 7 It is a three-dimensional schematic diagram of a fixed base according to an embodiment of the present invention.

[0023] Figure 8 It is a three-dimensional schematic diagram of a sliding base according to an embodiment of the present invention.

[0024] Fig. 9 It is a three-dimensional schematic diagram of a first ball bucket according to an embodiment of the present invention.

[0025] Fig.10 It is a three-dimensional schematic diagram of a goal bucket according to an embodiment of the present invention.

[0026] Fig.11 It is a three-dimensional schematic diagram of a second ball bucket according to an embodiment of the present invention.

[0027] Reference numerals:

[0028] Fuel ball 100;

[0029] Fixed base 1; mounting groove 11;

[0030] First ball bucket assembly 2; first ball bucket 21; first connecting member 211; first rod 212; second rod 213; first lap joint 214; retaining ring 22; stopper 221; connecting portion 222; goal ball bucket 23; first shaft 24;

[0031] A first limiting assembly 3; a first stopper 31; a second stopper 32;

[0032] Sliding base 4; boss 41;

[0033] Second ball bucket assembly 5; second ball bucket 51; second connecting member 511; third rod 512; fourth rod 513; second lap joint 514; second shaft 52;

[0034] The second limit assembly 6; the third stopper 61; the fourth stopper 62; the ball blocking stopper 63;

[0035] Goal tube 7;

[0036] Ball outlet tube 8. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] The fuel lifting device according to the embodiment of the present invention is described below with reference to the accompanying drawings.

[0039] like Figure 1-Figure 11 As shown, the fuel lifting device of the embodiment of the present invention includes a fixed base 1, a first ball bucket group 2, a first limit assembly 3, a sliding base 4, a second ball bucket group 5 and a second limit assembly 6.

[0040] The first ball bucket group 2 includes a plurality of first ball buckets 21, the plurality of first ball buckets 21 are arranged at intervals in the vertical direction, the first ball buckets 21 are rotatably connected to the fixed base 1, the first limit assembly 3 is connected to the fixed base 1, there are a plurality of first limit assemblies 3, the plurality of first limit assemblies 3 correspond to the plurality of first ball buckets 21 one by one, and the first end of the first ball bucket 21 (such as Figure 1 The left end shown in the figure is located in the corresponding first limiting assembly 3, and the first limiting assembly 3 is used to limit the rotation angle of the first ball bucket 21 and prevent the fuel ball 100 on the first ball bucket 21 from detaching from the first ball bucket 21 from the first end of the first ball bucket 21.

[0041] The sliding base 4 is connected to the fixed base 1 and can slide in the vertical direction. The second ball bucket group 5 includes a plurality of second ball buckets 51, and the plurality of second ball buckets 51 correspond to the plurality of first ball buckets 21 one by one. The corresponding first ball buckets 21 and the second ball buckets 51 are on the same layer. The second ball buckets 51 are rotatably connected to the sliding base 4. At least part of the projection of the second ball bucket 51 on the horizontal plane overlaps with at least part of the projection of the first ball bucket 21 on the horizontal plane, so that when the sliding base 4 drives the second ball bucket 51 to move up and down, the second ball bucket 51 contacts and transmits force to the first ball bucket 21. The second limiting assembly 6 is connected to the sliding base 4. There are a plurality of second limiting assemblies 6, and the plurality of second limiting assemblies 6 correspond to the plurality of second ball buckets 51 one by one. The first end of the second ball bucket 51 (such as Figure 1 The right end shown in the figure is located in the corresponding second limit assembly 6, and the second limit assembly 6 is used to limit the rotation angle of the second ball bucket 51 and prevent the fuel ball 100 on the second ball bucket 51 from detaching from the second ball bucket 51 from the first end of the second ball bucket 51. In the initial position, multiple second ball buckets 51 and multiple first ball buckets 21 are alternately distributed in the vertical direction.

[0042] The fuel lifting process of the fuel lifting device is divided into three stages:

[0043] like Figure 1 As shown, in the initial position, the first ball bucket group 2 is located on the left side of the second ball bucket group 5, the first ball bucket 21 and the second ball bucket 51 are both tilted to the left, the second ball bucket 51 located on the same layer is higher than the first ball bucket 21, and the fuel ball 100 is located on the first ball bucket 21.

[0044] like Figure 1 and Figure 2As shown, in the first stage, the sliding base 4 slides downward relative to the fixed base 1, and the sliding base 4 drives the second ball bucket group 5 to move downward, and the first ball bucket 21 and the second ball bucket 51 located on the same layer are separated, and then the second ball bucket 51 located on the layer above the first ball bucket 21 contacts the first ball bucket 21, so that the left part of the second ball bucket 51 overlaps the upper part of the right part of the first ball bucket 21 (or, the right part of the first ball bucket 21 overlaps the lower part of the left part of the second ball bucket 51), and the second ball bucket 51 continues to move with the sliding base 4 Sliding downward, the right part of the first ball bucket 21 is subjected to the downward force of the left part of the second ball bucket 51, and the right part of the first ball bucket 21 gives an upward reaction force to the left part of the second ball bucket 51. The first ball bucket 21 and the second ball bucket 51 rotate clockwise until the first ball bucket 21 contacts the upper end of the first limit assembly 3 and the second ball bucket 51 contacts the lower end of the second limit assembly 6. At this time, the first ball bucket 21 and the second ball bucket 51 are both tilted to the right, and the fuel ball 100 on the first ball bucket 21 rolls from left to right to the second ball bucket 51 under the action of gravity.

[0045] During the rolling process of the fuel ball 100 from left to right, when the fuel ball 100 rolls to the right part of the first ball bucket 21, the fuel ball 100 applies a downward force to the right part of the first ball bucket 21, causing the first ball bucket 21 to have a tendency to rotate clockwise. Since the first ball bucket 21 contacts the upper end of the first limit assembly 3, the clockwise rotation of the first ball bucket 21 is restricted, so that when the fuel ball 100 rolls on the first ball bucket 21, the first ball bucket 21 remains tilted to the right. When the fuel ball 100 rolls to the left part of the second ball bucket 51, the fuel ball 100 applies a downward force to the left part of the second ball bucket 51, causing the second ball bucket 51 to have a tendency to rotate counterclockwise. Since the left part of the second ball bucket 51 overlaps the upper part of the right part of the first ball bucket 21, the counterclockwise rotation of the second ball bucket 51 is restricted, so that when the fuel ball 100 rolls on the second ball bucket 51, the second ball bucket 51 remains tilted to the right.

[0046] Particularly, during the first stage, since the top first ball bucket 21 does not contact any second ball bucket 51, the top first ball bucket 21 remains tilted to the left due to the combined action of its own gravity and the first limiting member, and since the bottom second ball bucket 51 does not contact any first ball bucket 21, the bottom second ball bucket 51 remains tilted to the left due to the combined action of its own gravity and the second limiting member.

[0047] like Figure 3As shown, in the second stage, the sliding base 4 slides upward relative to the fixed base 1 to drive the second ball bucket group 5 to move upward, and the first ball bucket 21 is separated from the second ball bucket 51. The first ball bucket 21 remains tilted to the right under the combined action of its own gravity and the first limit assembly 3, and the second ball bucket 51 remains tilted to the right under the combined action of its own gravity and the gravity of the fuel ball 100 and the second limit assembly 6; in particular, during the second stage, the top first ball bucket 21 remains tilted to the left under the combined action of its own gravity and the first limit member, and the bottom second ball bucket 51 remains tilted to the left under the combined action of its own gravity and the second limit member.

[0048] like Figure 4 and Figure 5 As shown, in the third stage, the sliding base 4 slides upward relative to the fixed base 1 to drive the second ball bucket group 5 to move upward, and the first ball bucket 21 and the second ball bucket 51 located on the same layer contact each other, so that the left part of the second ball bucket 51 overlaps the lower part of the right part of the first ball bucket 21 (or, the right part of the first ball bucket 21 overlaps the upper part of the left part of the second ball bucket 51), and the right part of the first ball bucket 21 is subjected to the upward force of the left part of the second ball bucket 51, and the right part of the first ball bucket 21 exerts a downward reaction force on the left part of the second ball bucket 51, and the first ball bucket 21 and the second ball bucket 51 rotate counterclockwise until the first ball bucket 21 contacts the lower end of the first limiting assembly 3 and the second ball bucket 51 contacts the upper end of the second limiting assembly 6. At this time, the first ball bucket 21 and the second ball bucket 51 are both tilted to the left, and the fuel ball 100 on the first ball bucket 21 rolls from right to left to the second ball bucket 51 under the action of gravity.

[0049] During the rolling process of the fuel ball 100 from right to left, when the fuel ball 100 rolls to the left part of the second ball bucket 51, the fuel ball 100 applies a downward force to the left part of the second ball bucket 51, causing the second ball bucket 51 to have a tendency to rotate counterclockwise. Since the second ball bucket 51 contacts the upper end of the second limit assembly 6, the counterclockwise rotation of the second ball bucket 51 is restricted, so that when the fuel ball 100 rolls on the second ball bucket 51, the second ball bucket 51 remains tilted to the right. When the fuel ball 100 rolls to the right part of the first ball bucket 21, the fuel ball 100 applies a downward force to the right part of the first ball bucket 21, causing the first ball bucket 21 to have a tendency to rotate clockwise. Since the right part of the first ball bucket 21 overlaps the upper part of the left part of the second ball bucket 51, the clockwise rotation of the first ball bucket 21 is restricted, so that when the fuel ball 100 rolls on the first ball bucket 21, the first ball bucket 21 remains tilted to the right.

[0050] Particularly, during the third stage, the top first ball bucket 21 remains tilted to the left due to the combined effect of its own gravity and the first stopper, and the bottom second ball bucket 51 remains tilted to the left due to the combined effect of its own gravity and the second stopper.

[0051] like Figure 6As shown, a fuel ball 100 in the upstream pipeline enters the first ball bucket 21 located at the lower left, and the fuel ball 100 on the first ball bucket 21 located at the top enters the downstream pipeline. The first ball bucket 21 and the second ball bucket 51 are both tilted to the left, so that the fuel lifting device is in the initial position.

[0052] The fuel lifting device of the embodiment of the present invention mechanically lifts the fuel elements by setting up the sliding base 4, the first ball bucket group 2 and the second ball bucket group 5, which will not cause adverse effects on the components or other objects in the core. In addition, the reciprocating motion stroke of the sliding base 4 is short, avoiding the problems of unstable motion and low efficiency caused by long-range driving.

[0053] like Figure 7 and Figure 8 As shown, in some embodiments, a mounting groove 11 is provided on the fixed base 1, the length of the mounting groove 11 is set in the vertical direction, and a boss 41 matching the mounting groove 11 is provided on the sliding base 4, and the boss 41 is slidably fitted in the mounting groove 11. Therefore, in these embodiments, the fixed base 1 and the sliding base 4 of the embodiments of the present invention are provided with the mounting groove 11 and the boss 41, and the fixed base 1 limits the sliding base 4, ensuring that the sliding base 4 slides in a set direction while preventing the sliding base 4 from falling off from the fixed base 1.

[0054] like Fig.10 , Figures 1 to 6 As shown, in some embodiments, the fuel lifting device also includes a retaining ring 22, the first ball bucket 21 located at the bottom is a scoring ball bucket 23, the first ball bucket 21 located at the top is a ball unloading ball bucket, and the first ball buckets 21 located between the scoring ball bucket 23 and the ball unloading ball bucket are all transfer ball buckets, and the retaining ring 22 is connected to the first end of the scoring ball bucket 23. When the scoring ball bucket 23 tilts to the left, a fuel ball 100 in the upstream pipeline moves to the first ball bucket 21. When the scoring ball bucket 23 tilts to the right, the retaining ring 22 blocks the fuel ball 100 in the upstream pipeline from moving toward the fixed base 1, thereby preventing the fuel ball 100 in the upstream pipeline from getting stuck in the scoring ball bucket 23 or even detaching from the upstream pipeline and the fuel lifting device.

[0055] like Figure 1 and Fig.10As shown, specifically, the retaining ring 22 includes a stopper 221 and a connecting portion 222, the connecting portion 222 is connected to the goal ball bucket 23, and the angle between the connecting portion 222 and the upper end surface of the goal ball bucket 23 is an obtuse angle, so that the connecting portion 222 and the left portion of the goal ball bucket 23 form an upward opening receiving groove, the stopper 221 is arc-shaped and connected to the connecting portion 222, when the goal ball bucket 23 tilts to the left, a fuel ball 100 in the upstream pipeline moves to the goal ball bucket 23 and is accommodated in the receiving groove to block the subsequent fuel balls 100 and prevent multiple fuel balls 100 from entering the goal ball bucket 23 at the same time, when the goal ball bucket 23 tilts to the right, the connecting portion 222 stops the fuel ball 100 on the goal ball bucket 23 from moving toward the upstream pipeline, and at the same time the stopper 221 blocks the fuel ball 100 in the upstream pipeline to prevent the fuel ball 100 in the upstream pipeline from moving toward the fixed base 1.

[0056] like Figure 1-Figure 8 As shown, in some embodiments, the first limiting assembly 3 corresponding to the transfer ball bucket includes a first baffle 31 and a second baffle 32, and the first limiting assembly 3 corresponding to the goal ball bucket 23 and the ball unloading bucket includes the second baffle 32, the second baffle 32 is located below the corresponding first ball bucket 21, and the first baffle 31 is located above the corresponding first ball bucket 21; when the left part of the first ball bucket 21 contacts the first baffle 31, the first ball bucket 21 tilts to the right, and when the left part of the first ball bucket 21 contacts the second baffle 32, the first ball bucket 21 tilts to the left, at this time, the first baffle 31 blocks the fuel ball 100 on the first ball bucket 21 from moving to the left to prevent the fuel ball 100 on the first ball bucket 21 from detaching from the first ball bucket 21; the first limiting assembly 3 corresponding to the goal ball bucket 23 and the ball unloading bucket is not provided with the first baffle 31, which prevents the first baffle 31 from obstructing the upstream pipeline from supplying balls to the goal ball bucket 23 and prevents the first baffle 31 from obstructing the ball unloading bucket from unloading balls to the downstream pipeline.

[0057] The second limiting assembly 6 includes a third gear bar 61, a fourth gear bar 62 and a ball blocking gear bar 63, the third gear bar 61 is located above the corresponding second ball bucket 51, the fourth gear bar 62 is located below the corresponding second ball bucket 51, and the ball blocking gear bar 63 is located above the corresponding third gear bar 61; when the right part of the second ball bucket 51 contacts the third gear bar 61, the second ball bucket 51 tilts to the left, and when the right part of the second ball bucket 51 contacts the fourth gear bar 62, the second ball bucket 51 tilts to the right. At this time, the ball blocking gear bar 63 and the third gear bar 61 block the fuel ball 100 on the second ball bucket 51 from moving to the right to prevent the fuel ball 100 on the second ball bucket 51 from detaching from the second ball bucket 51.

[0058] like Figure 8 As shown, specifically, there are two ball blocking rods 63 , and both of the two ball blocking rods 63 are located above the corresponding third blocking rods 61 , further preventing the fuel ball 100 on the second ball bucket 51 from escaping from the second ball bucket 51 .

[0059] Specifically, the first connecting member 211 and the second connecting member 511 are both provided with a sleeve (not shown). The first connecting member 211 is connected to the first shaft 24 via the sleeve and can rotate around the axis of the first shaft 24. The second connecting member 511 is connected to the second shaft 52 via the sleeve and can rotate around the axis of the second shaft 52.

[0060] like Figure 1-Figure 7 As shown, in some embodiments, the fuel lifting device also includes a first shaft 24 and a second shaft 52, the first shaft 24 is connected to the fixed base 1, and there are multiple first shafts 24, and the multiple first shafts 24 correspond one-to-one to the multiple first ball buckets 21, and the first ball buckets 21 are rotatably connected to the corresponding first shafts 24, so that the first ball buckets 21 can rotate around the axis of the corresponding first shaft 24 as the rotation center, and the second shaft 52 is connected to the sliding base 4, and there are multiple second shafts 52, and the multiple second shafts 52 correspond one-to-one to the multiple second ball buckets 51, and the second ball buckets 51 are rotatably connected to the corresponding second shafts 52, so that the second ball buckets 51 can rotate around the axis of the corresponding second shaft 52 as the rotation center.

[0061] like Figure 1 , Figure 9-11 As shown, in some embodiments, the first ball bucket 21 includes a first connecting member 211, a first rod 212 and a second rod 213, the first connecting member 211 is rotatably connected to the first shaft 24, the middle part of the first rod 212 is connected to the first end of the first connecting member 211, the middle part of the second rod 213 is connected to the second end of the second connecting member 511, the maximum distance between the first rod 212 and the second rod 213 is less than the diameter of the fuel ball 100, the first end of the first rod 212 and the first end of the second rod 213 are both located in the first limiting assembly 3, when the fuel ball 100 passes over the first ball bucket 21, dust and debris fall from between the first rod 212 and the second rod 213 to the bottom of the fixed base 1, thereby avoiding the influence of dust and debris on the transportation of the fuel ball 100 and improving the reliability of equipment operation.

[0062] The second ball bucket 51 includes a second connecting member 511, a third rod 512 and a fourth rod 513. The second connecting member 511 is rotatably connected to the second shaft 52. The middle part of the third rod 512 is connected to the first end of the second connecting member 511. The middle part of the fourth rod 513 is connected to the second end of the second connecting member 511. The maximum distance between the third rod 512 and the fourth rod 513 is smaller than the diameter of the fuel ball 100. The first end of the third rod 512 and the first end of the fourth rod 513 are both located in the second limiting assembly 6. When the fuel ball 100 passes over the second ball bucket 51, dust and debris fall from between the third rod 512 and the fourth rod 513 to the bottom of the fixed base 1, thereby avoiding the influence of dust and debris on the transportation of the fuel ball 100 and improving the reliability of equipment operation.

[0063] Therefore, in these embodiments, the fuel lifting device of the embodiment of the present invention causes dust and debris to fall to the bottom of the fixed base 1 through the arrangement of the first rod 212 to the fourth rod 513, thereby avoiding the transportation of the fuel ball 100 being affected by the adhesion and accumulation of dust and debris on the first ball bucket 21 and the second ball bucket 51, thereby improving the operational reliability of the fuel lifting device.

[0064] Furthermore, the first rod 212 is parallel to the second rod 213, and the third rod 512 is parallel to the fourth rod 513, so that the distance between the first rod 212 and the second rod 213 is equal, and the distance between the third rod 512 and the fourth rod 513 is equal, so that the fuel ball 100 moves more smoothly on the first ball bucket 21 and the second ball bucket 51, thereby improving the stability of the fuel ball 100 moving on the first ball bucket 21 and the second ball bucket 51.

[0065] like Figure 1 , Figure 9-11 As shown, the first ball bucket 21 also includes two first lap joints 214, one of which is connected to the second end of the first rod 212 (such as Figure 1 The other first lap joint 214 is connected to the second end of the second rod 213 (as shown in the right end). Figure 1 The second ball bucket 51 further includes two second lap joints 514, one of which is connected to the second end of the third rod 512 (as shown in FIG. Figure 1 The other second lap joint 514 is connected to the second end of the fourth rod 513 (as shown in FIG. Figure 1 As shown in the left end, at least a portion of the projection of the first lap joint 214 on the horizontal plane overlaps with at least a portion of the projection of the second lap joint 514 on the horizontal plane.

[0066] It should be noted that a first channel is formed between the first rod 212 and the second rod 213, and a second channel is formed between the third rod 512 and the fourth rod 513. When the right part of the first ball bucket 21 contacts the left part of the second ball bucket 51, the first lap joint 214 overlaps the second lap joint 514, so that the first channel is connected with the second channel, ensuring that the fuel ball 100 transfers between the first ball bucket 21 and the second ball bucket 51 and the fuel ball 100 smoothly transitions when passing through the junction of the first ball bucket 21 and the second ball bucket 51.

[0067] like Figure 9-11As shown, specifically, the first lap joint 214 is located below the first rod 212 and the second rod 213, the first lap joint 214 connected to the first rod 212 extends along the axial direction of the first rod 212, and the first lap joint 214 connected to the second rod 213 extends along the axial direction of the second rod 213; the second lap joint 514 is located between the third rod 512 and the fourth rod 513 and below the third rod 512 and the fourth rod 513, the second lap joint 514 connected to the third rod 512 extends toward the fourth rod 513 and bends downward, and the second lap joint 514 connected to the fourth rod 513 extends toward the third rod 512 and bends downward.

[0068] Therefore, in these embodiments, the fuel lifting device of the embodiment of the present invention ensures reliable transfer of the fuel ball 100 between the first ball bucket 21 and the second ball bucket 51 by setting the first lap joint 214 and the second lap joint 514.

[0069] In some embodiments, the fuel lifting device also includes lubricating parts (not shown), and lubricating parts are provided at the connection between the fixed base 1 and the sliding base 4, the connection between the first shaft 24 and the first connecting member 211, and the connection between the second shaft 52 and the second connecting member 511.

[0070] Specifically, the inner wall of the mounting groove 11 , the outer wall of the boss 41 , the outer wall of the first shaft 24 , the inner wall of the sleeve of the first connecting member 211 , the outer wall of the second shaft 52 , and the inner wall of the sleeve of the second connecting member 511 are all provided with lubricating parts.

[0071] Optionally, the lubricating part is a molybdenum disulfide film, and the connection between the fixed base 1 and the sliding base 4, the connection between the first shaft 24 and the first connecting member 211, and the connection between the second shaft 52 and the second connecting member 511 are coated with molybdenum disulfide to form a molybdenum disulfide film.

[0072] Optionally, the lubricating part is a vacuum carbon-coated film, and the connection between the fixed base 1 and the sliding base 4, the connection between the first shaft 24 and the first connecting member 211, and the connection between the second shaft 52 and the second connecting member 511 are formed by vacuum carbon coating.

[0073] Therefore, in these embodiments, the fuel lifting device of the embodiment of the present invention solves the problem of lubrication and wear of rotating parts in high-pressure, high-temperature and high-irradiation environments by providing lubricating parts to perform solid lubrication treatment on the surface of sliding parts.

[0074] like Figure 1-Figure 6As shown, the fixed base 1 has a ball inlet pipe 7 and a ball outlet pipe 8, the first end of the ball inlet pipe 7 is connected to the side wall of the fixed base 1 and corresponds to the first ball bucket 21 located at the bottom, the ball inlet pipe 7 is inclined upward in the direction from the first end to the second end, the ball inlet pipe 7 is connected to the upstream pipeline to transport the fuel ball 100 into the ball inlet pipe 7, the first end of the ball outlet pipe 8 is connected to the side wall of the fixed base 1 and corresponds to the first ball bucket 21 located at the top, the ball outlet pipe 8 is inclined downward in the direction from the first end to the second end, and the ball outlet pipe 8 is connected to the downstream pipeline to transport the fuel ball 100 to the downstream pipeline.

[0075] In one embodiment, the fixed base 1 is a wide flat base, the thickness of the fixed base 1 is at least 30 mm, the depth of the mounting groove 11 is at least 15 mm, the inner wall of the mounting groove 11 is coated with molybdenum disulfide or vacuum-coated carbon film (DLC), and the surface of the boss 41 of the sliding base 4 is coated with molybdenum disulfide or vacuum-coated carbon film (DLC), and the coating depth is more than 15 μm.

[0076] The first ball bucket group 2 includes 10 to 20 first ball buckets 21, the distance between two adjacent first ball buckets 21 is 100 mm, the inner diameter of the sleeve on the first connecting member 211 is 10 mm and the inner wall of the sleeve is coated with molybdenum disulfide or vacuum-coated with carbon film (DLC), the diameters of the first rod 212 and the second rod 213 are 3 mm, and the distance between the first rod 212 and the second rod 213 is 40 mm, the first lap joint 214 connected to the first rod 212 extends along the axial direction of the first rod 212, and the first lap joint 214 connected to the second rod 213 extends along the axial direction of the second rod 213; a retaining ring 22 is provided at one end of the first ball bucket 21 located at the bottom close to the goal tube 7, and the stopper 221 of the retaining ring 22 is arc-shaped.

[0077] The diameter of the first shaft 24 is 10 mm, and the outer surface of the first shaft 24 is coated with molybdenum disulfide or vacuum-coated with carbon film (DLC). The distance between the first baffle rod 31 and the second baffle rod in the first limiting assembly 3 is 50 mm. The first baffle rod 31 and the second baffle rod 32 are both located on the left side of the first shaft 24, and the horizontal distance between the first baffle rod 31 and the second baffle rod 32 and the first shaft 24 is 40 mm. The second baffle rod 32 is located below the first shaft 24, and the height difference between the second baffle rod 32 and the first shaft 24 is 10 mm. The first limiting assembly 3 located at the bottom and the first limiting assembly 3 located at the top both include only the second baffle rod to prevent the first baffle rod from affecting the goal and the ball.

[0078] The second ball bucket group 5 includes 10 to 20 second ball buckets 51, the number of second ball buckets 51 is the same as the number of first ball buckets 21, the distance between two adjacent second ball buckets 51 is 100 mm, the inner diameter of the sleeve on the second connecting member 511 is 10 mm and the inner wall of the sleeve is coated with molybdenum disulfide or vacuum-coated with carbon film (DLC), the diameters of the third rod 512 and the fourth rod 513 are both 3 mm, and the distance between the third rod 512 and the fourth rod 513 is 50 mm, the second lap joint 514 connected to the third rod 512 extends toward the fourth rod 513 and bends downward, and the second lap joint 514 connected to the fourth rod 513 extends toward the third rod 512 and bends downward.

[0079] The diameter of the second shaft 52 is 10 mm, and the outer surface of the second shaft 52 is coated with molybdenum disulfide or vacuum carbon film (DLC). The distance between the third gear rod 61 and the fourth gear rod 62 in the second limit assembly 6 is 40 mm. The second limit assembly 6 includes two ball blocking gear rods 63. The distance between the third gear rod 61 and the adjacent ball blocking gear rod 63 is 20 mm, and the distance between the two ball blocking gear rods 63 is 20 mm. The fourth gear rod 62 is located below the second shaft 52, and the height difference between the fourth gear rod 62 and the second shaft 52 is 10 mm. The horizontal distance between the fourth gear rod 62 and the second shaft 52 is 40 mm.

[0080] The fuel ball 100 is a high temperature gas-cooled reactor fuel ball 100, the diameter of the fuel ball 100 is 60 mm, the inlet pipe 7 and the outlet pipe 8 are round pipes, and the diameters of the inlet pipe 7 and the outlet pipe 8 are both 65 mm.

[0081] Therefore, the fuel lifting device of this embodiment can effectively lift the fuel ball 100 only through the up and down reciprocating motion of the sliding base 4, and the stroke is within 20 cm. The transportation efficiency is high, and the lifting efficiency can reach 8000 to 20000 times / day. The overall structure is simple and modular assembly can be achieved; the first ball bucket 21 and the second ball bucket 51 adopt a frame structure, and dust and debris will not affect the movement of the fuel ball 100, thereby improving the lifting reliability, and the first lap joint 214 and the second lap joint 514 are used to achieve reliable transfer of the fuel ball 100 during the movement of the first ball bucket 21 and the second ball bucket 51; by performing surface solid lubrication treatment on the sliding surface, the problem of lubrication and wear of rotating parts in high-pressure, high-temperature and high-irradiation environments is solved; and single-ball transportation is achieved through the retaining ring 22 structure.

[0082] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A fuel lifting device, characterized in that: include: Fixed base; A first ball bucket group, the first ball bucket group includes a plurality of first ball buckets, the plurality of first ball buckets are arranged at intervals along the vertical direction, and the first ball buckets are rotatably connected to the fixed base; A first limiting assembly, wherein the first limiting assembly is connected to the fixed base, there are a plurality of the first limiting assemblies, the plurality of the first limiting assemblies correspond to the plurality of the first ball buckets one by one, and the first end of the first ball bucket is located in the corresponding first limiting assembly; A sliding base, the sliding base is connected to the fixed base and is slidable in a vertical direction; a second ball bucket group, wherein the second ball bucket group includes a plurality of second ball buckets, the plurality of second ball buckets correspond to the plurality of first ball buckets one by one, the second ball buckets are rotatably connected to the sliding base, at least a portion of the projection of the second ball bucket on the horizontal plane overlaps with at least a portion of the projection of the first ball bucket on the horizontal plane, and in an initial position, the plurality of second ball buckets and the plurality of first ball buckets are alternately distributed in a vertical direction; A second limiting assembly, wherein the second limiting assembly is connected to the sliding base, there are a plurality of the second limiting assemblies, the plurality of the second limiting assemblies correspond to the plurality of the second ball buckets one by one, and the first end of the second ball bucket is located in the corresponding second limiting assembly; It also includes a retaining ring, the first ball bucket at the bottom is a scoring ball bucket, the first ball bucket at the top is a ball unloading bucket, the first ball buckets between the scoring ball bucket and the ball unloading bucket are all transfer ball buckets, and the retaining ring is connected to the first end of the scoring ball bucket; The first limiting assembly corresponding to the transfer ball bucket includes a first stopper and a second stopper, and the first limiting assembly corresponding to the goal ball bucket and the unloading ball bucket includes a second stopper, the second stopper is located below the corresponding first ball bucket, and the first stopper is located above the corresponding first ball bucket; The second limiting assembly includes a third gear rod, a fourth gear rod and a ball blocking gear rod, the third gear rod is located above the corresponding second ball bucket, the fourth gear rod is located below the corresponding second ball bucket, and the ball blocking gear rod is located above the corresponding third gear rod.

2. The fuel lifting device according to claim 1, characterized in that: It also includes a first shaft and a second shaft, wherein the first shaft is connected to the fixed base, there are multiple first shafts, and the multiple first shafts correspond one-to-one to the multiple first ball buckets, and the first ball buckets are rotatably connected to the corresponding first shafts, and the second shaft is connected to the sliding base, there are multiple second shafts, and the multiple second shafts correspond one-to-one to the multiple second ball buckets, and the second ball buckets are rotatably connected to the corresponding second shafts.

3. The fuel lifting device according to claim 2, characterized in that: The first ball bucket comprises a first connecting member, a first rod and a second rod, the first connecting member is rotatably connected to the first shaft, the middle portion of the first rod is connected to the first end of the first connecting member, the middle portion of the second rod is connected to the second end of the first connecting member, the maximum distance between the first rod and the second rod is smaller than the diameter of the fuel ball, and the first end of the first rod and the first end of the second rod are both located in the first limiting assembly; The second ball bucket includes a second connecting member, a third rod and a fourth rod, the second connecting member is rotatably connected to the second shaft, the middle part of the third rod is connected to the first end of the second connecting member, the middle part of the fourth rod is connected to the second end of the second connecting member, the maximum distance between the third rod and the fourth rod is smaller than the diameter of the fuel ball, and the first end of the third rod and the first end of the fourth rod are both located in the second limiting assembly.

4. The fuel lifting device according to claim 3, characterized in that: The first ball bucket further comprises two first lap joints, wherein one of the first lap joints is connected to the second end of the first rod, and the other first lap joint is connected to the second end of the second rod; The second ball bucket also includes two second lap joints, one of which is connected to the second end of the third rod, and the other is connected to the second end of the fourth rod, and at least part of the projection of the first lap joint in the vertical direction overlaps with at least part of the projection of the second lap joint in the vertical direction.

5. The fuel lifting device according to claim 3, characterized in that: The first rod is parallel to the second rod, and the third rod is parallel to the fourth rod.

6. The fuel lifting device according to claim 3, characterized in that: It also includes a lubricating member, and the lubricating member is provided at the connection between the fixed base and the sliding base, the connection between the first shaft and the first connecting member, and the connection between the second shaft and the second connecting member.

7. The fuel lifting device according to claim 6, characterized in that: The lubricating component is a molybdenum disulfide film, or the lubricating component is a vacuum carbon-plated film.

8. The fuel lifting device according to claim 1, characterized in that: The fixed base has a goal tube and a ball outlet tube, the first end of the goal tube is connected to the side wall of the fixed base and corresponds to the first ball bucket located at the bottom, the goal tube is inclined upward in the direction from the first end to the second end, the goal tube is connected to the upstream pipeline to transport fuel balls into the goal tube, the first end of the ball outlet tube is connected to the side wall of the fixed base and corresponds to the first ball bucket located at the top, the ball outlet tube is inclined downward in the direction from the first end to the second end, and the ball outlet tube is connected to the downstream pipeline to transport fuel balls to the downstream pipeline.

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