Loading device for pebble bed high temperature reactor

Abstract

The application discloses a kind of ball bed type high temperature reactor loading device, the ball bed type high temperature reactor loading device includes mounting bracket, pressing piece, conveying pipe and buffer piece, pressing piece is arranged below mounting bracket and relative to the height direction of mounting bracket movable, pressing piece is suitable for pressing fuel storage tank mouth or away from fuel storage tank mouth, first hole is arranged on pressing piece and is penetrated through pressing piece along the height direction of mounting bracket, conveying pipe is suitable for passing into fuel, conveying pipe is arranged on mounting bracket and relative to the height direction of mounting bracket movable, conveying pipe is movably arranged in first hole, one end of buffer piece is arranged in conveying pipe and is adjacent to the lower end of conveying pipe, to slow down the fuel in conveying pipe.The ball bed type high temperature reactor loading device of the application has the advantages of simple structure, low fuel breakage rate and the like.

Description

Technical Field

[0001] This invention relates to the field of reactor engineering technology, and more specifically, to a pebble bed type high-temperature reactor charging device. Background Technology

[0002] The pebble bed high-temperature gas-cooled reactor (HTGR) is an advanced nuclear reactor with inherent safety, suitable for efficient power generation and high-temperature heating, and is one of the preferred reactor types in the international fourth-generation nuclear energy system field. The fuel cycle system, as the online refueling system of the HTGR, is a key system for ensuring the long-term safe and stable operation of the HTGR. Therefore, the reliability of the key equipment in the fuel cycle system directly determines the safe operating level of the HTGR.

[0003] In related technologies, the fuel breakage rate is high when fuel flows into the fuel storage tank. Summary of the Invention

[0004] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0005] In related technologies, high-temperature gas-cooled reactors use spherical fuel elements based on graphite, which are brittle and hard. During transport through steel process pipelines in the fuel cycle system, the spherical fuel elements are prone to breakage due to factors such as significant height differences and collisions with steel materials. During reactor unloading, fuel elements that have reached burnup depth are not returned to the core but are instead transported to spent fuel storage tanks several meters high. The significant height difference and the protruding edges of the tank openings can cause breakage of the spherical fuel elements. Under certain special operating conditions, the reactor requires complete core evacuation. In this case, incompletely burned fuel elements are transported through the same process pipelines to refueling tanks. Damaged fuel elements cannot be reloaded into the core for continued recycling, resulting in direct economic losses and significantly increased radioactive waste disposal costs.

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose a ball-bed type high-temperature stacking device with a simple structure and low fuel breakage rate.

[0008] A ball-bed type high-temperature fuel loading device according to an embodiment of the present invention includes: a mounting frame; a clamping member disposed below the mounting frame and movable relative to the height of the mounting frame, the clamping member being adapted to clamp the opening of a fuel storage tank or move away from the opening of the fuel storage tank, the clamping member having a first hole penetrating the clamping member along the height of the mounting frame; a conveying pipe adapted to carry fuel, the conveying pipe being disposed on the mounting frame and movable relative to the height of the mounting frame, the conveying pipe being movably inserted into the first hole; a buffer member, one end of the buffer member being disposed inside the conveying pipe and disposed adjacent to the lower end of the conveying pipe, so as to decelerate the fuel in the conveying pipe; the ball-bed type high-temperature fuel loading device has a first state and a second state, in the first state, the clamping member being movable along the height of the mounting frame so as to clamp the opening of the fuel storage tank, and in the second state, the conveying pipe being movable along the height of the mounting frame so as to move the lower end of the conveying pipe into the fuel storage tank.

[0009] The ball-bed high-temperature fuel loading device of this invention is equipped with a mounting frame, clamping components, conveying pipes and buffer components, which can transport fuel safely and without damage to fuel storage tanks, ensuring the safe and reliable operation of the reactor and reducing the damage to fuel elements during unloading.

[0010] In some embodiments, the top end of the mounting bracket is provided with a second hole that penetrates the mounting bracket along the height direction of the mounting bracket, the second hole and the first hole are spaced apart and opposite to each other along the height direction of the mounting bracket, and the upper end of the conveying pipe passes through the first hole.

[0011] In some embodiments, the delivery pipe includes a first segment and a second segment connected to each other along the height direction of the mounting frame. One end of the first segment passes through a second hole, one end of the second segment passes through the first hole and the second segment is movable relative to the height direction of the mounting frame, and the other end of the second segment passes through the first hole. In the second state, the second segment moves along the height direction of the mounting frame so that the lower end of the delivery pipe moves into the fuel tank.

[0012] In some embodiments, there are multiple buffers disposed within the second segment, and the multiple buffers are spaced apart in multiple columns along the circumferential direction of the second segment, with each column including a plurality of buffers spaced apart along the height direction of the mounting frame.

[0013] In some embodiments, the buffer extends radially along the conveying pipe and is inclined toward the bottom of the mounting bracket, the other end of the buffer is radially spaced from the inner circumferential surface of the conveying pipe, and the cross-sectional area of ​​the buffer gradually increases along the inner circumferential surface adjacent to the conveying pipe.

[0014] In some embodiments, the ball-bed type high-temperature stacking device further includes a mounting box, which is disposed within the mounting frame and is movable relative to the height of the mounting frame. The clamping member is disposed at the bottom of the mounting box so that the mounting box drives the clamping member to move along the height of the mounting frame. The conveying pipe is movably inserted through the mounting box.

[0015] In some embodiments, the ball-bed type high-temperature stacking device further includes: a first driving member, which is disposed on the mounting frame and connected to the mounting box, so that in the first state, the first driving member drives the mounting box to move in the height direction of the mounting frame; and a second driving member, which is disposed on the mounting box and connected to the conveying pipe, so that in the second state, the second driving member drives the conveying pipe to move in the height direction of the mounting frame.

[0016] In some embodiments, the first driving component includes a first servo motor, a lead screw, and a slider. The first servo motor is mounted on the mounting bracket. The lead screw is rotatably mounted on the mounting bracket and extends along the height direction of the mounting bracket. One end of the lead screw is connected to the output end of the first servo motor. The slider has a threaded hole that passes through the slider along the height direction of the mounting bracket. The lead screw passes through the threaded hole and engages with the threaded hole. One end of the slider is mounted on the mounting box. The first servo motor drives the lead screw to rotate, and the lead screw drives the slider to move along the height direction of the mounting bracket, thereby moving the mounting box along the height direction of the mounting bracket. The second driving component is a second servo motor. The output shaft of the second servo motor, which is fixed on the mounting box, has a gear. The outer circumferential surface of the conveying pipe has a rack that engages with the gear. The rack extends along the height direction of the mounting bracket so that the second servo motor drives the conveying pipe to move through the engagement of the gear and the rack.

[0017] In some embodiments, the clamping member includes a sleeve disposed on the bottom surface of the mounting box and the inner circumferential surface of the sleeve defines the first hole. The bottom surface of the mounting box is provided with a third hole penetrating the mounting box along the height direction of the mounting frame. The third hole communicates with the first hole. In the first state, the lower end of the delivery pipe passes through the third hole and is contained within the first hole. In the second state, the delivery pipe passes through the third hole and the first hole in sequence and moves into the interior of the fuel storage tank.

[0018] In some embodiments, the ball-bed type high-temperature stacking device further includes: a first linear slide rail and a second linear slide rail, both the first and second linear slide rails being disposed on the mounting frame and spaced apart from each other along the width direction of the mounting frame, and both the first and second linear slide rails extending along the height direction of the mounting frame; a first mating part and a second mating part, the first mating part being disposed on the side of the mounting box adjacent to the first linear slide rail and slidingly mating with the first linear slide rail, the second mating part being disposed on the side of the mounting box adjacent to the second linear slide rail and slidingly mating with the second linear slide rail; a third linear slide rail and a fourth linear slide rail, both the third and fourth linear slide rails extending along the height direction of the mounting frame and disposed within the mounting box, and spaced apart from each other along the width direction of the mounting frame; a third mating part and a fourth mating part, the third mating part being disposed on one side of the conveying pipe and slidingly mating with the third linear slide rail, and the fourth mating part being disposed on the other side of the conveying pipe and slidingly mating with the fourth linear slide rail. Attached Figure Description

[0019] Figure 1 This is a front view of the ball-bed type high-temperature stacking device according to an embodiment of the present invention.

[0020] Figure 2 This is a rear view of the ball-bed type high-temperature stacking device according to an embodiment of the present invention.

[0021] Figure 3 This is an exploded view of the mounting box and conveying pipe of the ball-bed type high-temperature stacking device according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the installation box and conveying pipe of the ball-bed type high-temperature stacking device according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the second section of the conveying pipe of the ball-bed type high-temperature stacking device according to an embodiment of the present invention.

[0024] Figure label:

[0025] 100-cell ball-bed type high-temperature stacking and loading device;

[0026] Mounting bracket 1;

[0027] Clamping component 2;

[0028] Delivery pipe 3; First section 31; Second section 32;

[0029] Buffer 4;

[0030] Installation box 5;

[0031] First drive component 6; First servo motor 61; Lead screw 62; Slider 63;

[0032] Second drive component 7; Second servo motor 71; Gear 72; Rack 73;

[0033] First linear slide rail 8; Second linear slide rail 9; First mating part 10; Second mating part 101;

[0034] Third linear slide rail 102; Fourth linear slide rail 103; Third mating part 104; Fourth mating part 105; Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The ball-bed type high-temperature stacking device according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0037] like Figure 1-5 As shown, the ball-bed type high-temperature stacking device 100 according to an embodiment of the present invention includes a mounting frame 1, a clamping component 2, a conveying pipe 3, and a buffer component 4.

[0038] The clamping element 2 is located below the mounting bracket 1 and relative to the height of the mounting bracket 1 (e.g., ...). Figure 1 The clamping member 2 (as shown in the vertical direction) is movable and is adapted to clamp the fuel tank opening or move away from the fuel tank opening. The clamping member 2 has a first hole penetrating through it along the height direction of the mounting bracket 1. Specifically, as shown... Figure 1-4 As shown, the clamping member 2 is located at the lower end of the mounting bracket 1 and can move vertically upwards, and the clamping member 2 is provided with a first hole that penetrates the clamping member 2 in the vertical direction.

[0039] The delivery pipe 3 is suitable for introducing fuel. The delivery pipe 3 is mounted on the mounting frame 1 and is movable relative to the height of the mounting frame 1. The delivery pipe 3 is movably inserted into the first hole. Specifically, as shown... Figure 1-4 As shown, the inner circumferential surface of the conveying pipe 3 defines the conveying cavity. The upper end of the conveying pipe 3 is the inlet, and the lower end of the conveying pipe 3 is the outlet. Fuel can flow into the conveying cavity through the inlet and then flow out of the conveying cavity through the outlet. The conveying pipe 3 extends in the vertical direction and is located in the mounting frame 1. The conveying pipe 3 can move in the vertical direction, and the lower end of the conveying pipe 3 passes through the first hole.

[0040] One end of the buffer 4 is disposed inside the delivery pipe 3 and adjacent to the lower end of the delivery pipe 3 to decelerate the fuel in the delivery pipe 3. Specifically, as shown in... Figure 5As shown, the buffer 4 can be a specific elastic rubber sheet and the buffer 4 can be a long strip. One end of the buffer 4 can be fixed on the inner circumferential surface of the conveying pipe 3, and the other end of the buffer 4 is a free end. When the fuel flows from the feed port to the discharge port, when the fuel impacts the buffer 4, the buffer 4 can decelerate the material, thereby reducing the amount of material flowing out of the discharge port.

[0041] The ball-bed type high-temperature stacking device 100 has a first state and a second state. In the first state, the clamping member 2 is movable along the height direction of the mounting frame 1 so that the clamping member 2 clamps the opening of the fuel storage tank. In the second state, the conveying pipe 3 moves along the height direction of the mounting frame 1 so that the lower end of the conveying pipe 3 moves into the fuel storage tank. In the first state, the clamping member 2 moves downward in the vertical direction so that the lower end of the clamping member 2 abuts against the end face of the feed inlet of the fuel storage tank. At this time, the conveying pipe 3 does not move. When the second state is started, after the clamping member 2 clamps the feed inlet of the fuel storage tank, the clamping member 2 stops moving, and the conveying pipe 3 begins to move downward in the vertical direction so that the conveying pipe 3 penetrates into the fuel storage tank. When the discharge port at the lower end of the conveying pipe 3 is close to the fuel in the fuel storage tank, the fuel flows into the conveying pipe 3 from the feed port at the upper end of the conveying pipe 3 and flows into the fuel storage tank through the discharge port. During the transportation of fuel, the conveying pipe 3 can be slowly moved upward according to the height of the fuel in the conveying pipe 3.

[0042] The ball-bed type high-temperature fuel loading device 100 of this invention is provided with a mounting frame 1, a clamping component 2, a conveying pipe 3, and a buffer component 4. The clamping component 2 and the conveying pipe 3 work together to transport fuel to the fuel storage tank through the conveying pipe 3, and the buffer component 4 can decelerate the fuel in the conveying pipe 3. This effectively solves the problem of fuel element damage caused by high drop and easy impact during the unloading and core emptying process of the fuel circulation system, improves the safety and reliability of the reactor, and reduces the amount of fuel element damage during the unloading process.

[0043] In some embodiments, the top end of the mounting bracket 1 is provided with a second hole penetrating the mounting bracket 1 along its height direction. The second hole and the first hole are spaced apart and opposite to each other along the height direction of the mounting bracket 1, and the upper end of the conveying pipe 3 passes through the first hole. Specifically, as shown in the figure... Figure 1-4 As shown, the top plate of the mounting frame 1 has a second hole that penetrates the top plate in the vertical direction. The second hole and the first hole are arranged opposite each other in the vertical direction. The lower end of the conveying pipe 3 passes through the second hole. Thus, the conveying pipe 3 is positioned through the second hole to prevent the conveying pipe 3 from being too long. The upper end of the conveying pipe 3 shakes during the movement of the mounting frame 1, thereby improving the stability of the movement of the conveying pipe 3.

[0044] In some embodiments, the delivery pipe 3 includes a first segment 31 and a second segment 32 connected to each other along the height direction of the mounting frame 1. One end of the first segment 31 passes through a second hole, one end of the second segment 32 passes through the first hole and the second segment 32 is movable relative to the height direction of the mounting frame 1, and the other end of the second segment 32 passes through the first hole. In a second state, the second segment 32 moves along the height direction of the mounting frame 1 so that the lower end of the delivery pipe 3 moves into the fuel storage tank. Specifically, as... Figure 1-5 As shown, the first section 31 is located at the upper end of the second section 32, and the cross-sectional area of ​​the inner circumferential surface of the first section 31 is smaller than the cross-sectional area of ​​the second pipe. The lower end of the first section 31 passes through the lower end of the second section 32. The upper end of the first pipe is fixed in the second hole, so that the position of the first pipe is fixed. The second pipe is movably passed through the second hole in the vertical direction. The feed inlet is formed at the upper end of the first section 31, and the discharge outlet is formed at the lower end of the second section 32, thereby fixing the feed inlet of the conveying pipe 3 to the upper end of the mounting bracket 1, which can ensure the stability of the fuel feed inlet. In the second state, the second section 32 moves up and down to extend or shorten the length of the conveying pipe 3, so that the conveying pipe 3 extends into the fuel storage tank, ensuring the stability of fuel delivery.

[0045] In some embodiments, multiple buffer members 4 are disposed within the second section 32. The multiple buffer members 4 are arranged in multiple rows along the circumferential direction of the second section 32, and each row includes several buffer members 4 spaced apart along the height direction of the mounting frame 1. Specifically, multiple buffer members 4 are disposed within the second section 32 and adjacent to the bottom of the second section 32, thereby ensuring the working efficiency of the buffer members 4 while preventing the buffer members 4 from affecting the movement of the second section 32 and preventing the buffer members 4 from abutting against the upper end of the first section 31. Multiple rows of buffer members 4 are equally spaced along the circumferential direction of the second section 32, and each row of buffer members 4 includes several buffer members 4 equally spaced along the vertical direction. Adjacent rows of buffer members 4 can be staggered in the vertical direction. Thus, the falling speed of the fuel is reduced by the blocking effect of multiple buffer members 4.

[0046] In some embodiments, the first segment 31 can be a corrugated pipe, with its upper end fixed inside the second hole and its lower end fixed to the upper end of the second segment 32. This makes the arrangement of the conveying pipe 3 more reasonable.

[0047] In some embodiments, the buffer 4 extends radially along the conveying pipe 3 and is inclined toward the bottom of the mounting frame 1. The other end of the buffer 4 is radially spaced from the inner circumferential surface of the conveying pipe 3, and the cross-sectional area of ​​the buffer 4 gradually increases along the inner circumferential surface adjacent to the conveying pipe 3. Specifically, one end of the buffer 4 is fixed to the inner circumferential surface of the second section 32, and the other end of the buffer 4 is a free end. The buffer 4 extends in the inward and outward directions and is inclined downward. In other words, the free end of the buffer 4 is inclined downward, which allows the buffer 4 to buffer and decelerate while preventing fuel from getting stuck in the conveying pipe 3, ensuring smooth fuel discharge. In addition, the cross-sectional area of ​​the buffer 4 gradually increases along the inner circumferential surface adjacent to the conveying pipe 3. In other words, the cross-sectional area of ​​the buffer 4 installed on the inner circumferential surface of the second section 32 is large, and the cross-sectional area of ​​the free end of the buffer 4 is small. This facilitates the installation of the buffer 4 on the inner circumferential surface of the second section 32 and reduces the buffering and blocking capacity of the free end of the buffer 4 on the fuel, ensuring that the fuel flows out from the second section, thus making the buffer 4 more reasonably positioned.

[0048] In some embodiments, the ball-bed type high-temperature stacking device 100 further includes a mounting box 5, which is disposed within the mounting frame 1 and is movable relative to the height of the mounting frame 1. A clamping member 2 is disposed at the bottom of the mounting box 5 so that the mounting box 5 can drive the clamping member 2 to move along the height of the mounting frame 1. A conveying pipe 3 movably passes through the mounting box 5. Specifically, as shown in the figure... Figure 1-4 As shown, the mounting box 5 is a rectangular box. The mounting box 5 is movably mounted on the mounting frame 1 in the vertical direction. The clamping member 2 is fixed to the bottom of the mounting box 5. The upper end of the first section 31 passes through the top of the mounting box 5 and is inserted into the second hole. The lower end of the first section 31 and the upper end of the second section 32 both pass through the mounting box 5. The bottom of the mounting frame 1 is provided with a fourth hole that penetrates through its bottom. The cross-sectional area of ​​the fourth hole is larger than the cross-sectional area of ​​the outer circumference of the mounting box 5, so that the mounting box 5 can move vertically through the fourth hole, so that the mounting box 5 provides a mounting base for the conveying pipe 3 and the clamping member 2. Thus, in the first state, the mounting box 5 moves vertically, thereby driving the clamping member 2 to move vertically. In the second state, the mounting box 5 is stationary, and the second section 32 moves vertically.

[0049] In some embodiments, the ball-bed type high-temperature stacking device 100 further includes a first drive member 6 and a second drive member 7.

[0050] The first driving component 6 is mounted on the mounting bracket 1 and connected to the mounting housing 5, so that in a first state, the first driving component 6 drives the mounting housing 5 to move in the height direction of the mounting bracket 1. Specifically, as shown... Figure 1-4As shown, the first driving component 6 includes a first servo motor 61, a lead screw 62, a slider 63, etc. The first servo motor 61 is on the mounting bracket 1. The lead screw 62 is rotatably mounted on the mounting bracket 1 and extends in the vertical direction. One end of the lead screw 62 is connected to the output end of the first servo motor 61. The slider 63 is provided with a threaded hole that passes through the slider 63 in the vertical direction. The lead screw 62 passes through the threaded hole and engages with the threaded hole. One end of the slider 63 is fixedly connected to the mounting box 5. The first servo motor 61 drives the lead screw 62 to rotate, and the lead screw 62 drives the slider 63 to move in the vertical direction, thereby driving the mounting box 5 to move in the vertical direction.

[0051] The second drive element 7 is mounted on the mounting box 5 and connected to the conveying pipe 3, so that in the second state, the second drive element 7 drives the conveying pipe 3 to move in the height direction of the mounting frame 1. Specifically, as Figure 1-4 As shown, the second driving component 7 is a second servo motor 71. The output shaft of the second servo motor 71, which is fixed on the mounting box 5, is equipped with a gear 72. The outer circumferential surface of the second segment 32 is equipped with a rack 73 that cooperates with the gear 72. The rack 73 extends in the vertical direction. Thus, through the rotation of the second servo motor 71 and the cooperation of the gear 72 and the rack 73, the second segment 32 is driven to move in the vertical direction.

[0052] In some embodiments, the first drive member 6 and the second drive member 7 may also be an electric telescopic rod, a hydraulic rod, etc.

[0053] In some embodiments, the clamping member 2 includes a sleeve disposed on the bottom surface of the mounting box 5, and the inner circumferential surface of the sleeve defines a first hole. The bottom surface of the mounting box 5 has a third hole penetrating the mounting box 5 along the height direction of the mounting bracket 1, and the third hole communicates with the first hole. In a first state, the lower end of the delivery pipe 3 passes through the third hole and is contained within the first hole. In a second state, the delivery pipe 3 passes through the third hole and the first hole in sequence and moves into the fuel storage tank. Specifically, as shown... Figure 1-4 As shown, the upper end of the clamping member 2 is fixed to the bottom surface of the mounting box 5. The bottom of the mounting box 5 is provided with a third hole that communicates with the first hole. In the first state, the second section 32 passes through the third hole and is inserted into the sleeve, thereby protecting the second section 32. In the second state, the second section passes through the third hole and the first hole in sequence and penetrates into the fuel storage tank.

[0054] In some embodiments, the ball-bed type high-temperature stacking device 100 further includes a first linear slide rail 8, a second linear slide rail 9, a first mating part 10, and a second mating part 101.

[0055] The first linear slide rail 8 and the second linear slide rail 9 are both mounted on the mounting bracket 1 and are spaced apart from each other along the width direction of the mounting bracket 1. Both the first linear slide rail 8 and the second linear slide rail 9 extend along the height direction of the mounting bracket 1. A first mating part 10 is provided on the side of the mounting box 5 adjacent to the first linear slide rail 8, and the first mating part 10 slides with the first linear slide rail 8. A second mating part 101 is provided on the side of the mounting box 5 adjacent to the second linear slide rail 9, and the second mating part 101 slides with the second linear slide rail 9. Specifically, as shown... Figure 1-4 As shown, the first linear slide rail 8 and the second linear slide rail 9 extend in the vertical direction. The first linear slide rail 8 and the second linear slide rail 9 are respectively installed on the frame of the mounting bracket 1 in the left and right directions. The first mating part 10 and the second mating part 101 are both protrusions and are respectively fixed at the left and right ends of the mounting box 5. The first mating part 10 is provided with a groove that mates with the first linear slide rail, and the second mating part 101 is provided with a groove that mates with the second linear slide rail. Thus, the first mating part 10, the first linear slide rail 8, the second mating part 101 and the second linear slide rail 9 prevent the mounting box 5 from shaking in the left and right directions during the vertical movement, ensuring the reliability of the movement of the mounting box 5.

[0056] In some embodiments, the ball-bed type high-temperature stacking device 100 further includes a third linear slide rail 102, a fourth linear slide rail 103, a third mating part 104, and a fourth mating part 105.

[0057] The third linear slide rail 102 and the fourth linear slide rail 103 both extend along the height direction of the mounting frame 1 and are disposed within the mounting box 5. The third linear slide rail 102 and the fourth linear slide rail 103 are spaced apart and opposite to each other along the width direction of the mounting frame 1. The third mating part 104 is disposed on one side of the conveying pipe 3 and slides in cooperation with the third linear slide rail 102, and the fourth mating part 105 is disposed on the other side of the conveying pipe 3 and slides in cooperation with the fourth linear slide rail 103. Specifically, as shown... Figure 1-4 As shown, the third linear slide rail 102 and the fourth linear slide rail 103 extend in the vertical direction and are respectively installed on the inner circumferential surface of the mounting box 5 in the left and right directions. The third mating part 104 and the fourth mating part 105 are both protrusions and are respectively fixed at the left and right ends of the second section 32. The third mating part 104 is provided with a groove that mates with the third linear slide rail, and the fourth mating part 105 is provided with a groove that mates with the fourth linear slide rail. Thus, the third linear slide rail 102, the fourth linear slide rail 103, the third mating part 104, and the fourth mating part 105 prevent the second section 32 from shaking in the left and right directions during the vertical movement, ensuring the reliability of the movement of the second section 32.

[0058] The working principle of the ball-bed type high-temperature stacking device 100 in this embodiment of the invention is as follows:

[0059] 1) In the initial state, the mounting box 5, the clamping component 2 and the delivery pipe 3 are located above the fuel storage tank, and the mounting box 5 is at the upper limit position at this time;

[0060] 2) When the charging instruction is issued, the fuel storage tank is in place, the ball bed type high temperature stack charging device 100 is in the first state, the first driving component 6 drives the mounting box 5 to descend to the lower limit position, so that the clamping component 2 clamps the tank opening of the fuel storage tank;

[0061] 3) When the ball-bed type high-temperature stacking device 100 is in the second state, the second drive component 7 drives the second section 32 to descend to the lower limit, and the buffer component is inserted into the fuel storage tank.

[0062] 4) When the formal charging begins, the fuel element enters the charging device through the ball pipe and enters the fuel storage tank through the conveying pipe 3;

[0063] 5) When a certain amount of fuel element is loaded, the tank level rises, and the second drive component 7 drives the second section 32 to move upward;

[0064] 6) As the material level continues to rise, alternately lift the mounting box 5 and the second section 32 until the loading is complete;

[0065] 7) After the loading is completed, the installation box 5 and the second section 32 move to the initial position.

[0066] This invention offers the following technical effects and advantages: It overcomes the fuel element damage problems caused by high drop and easy impact during unloading and core emptying in pebble bed high-temperature reactor technologies. It provides a highly adaptable, structurally reliable, and buffer-equipped loading device with significant integration features. The alternating action of the first drive component 6 and the second drive component 7 solves the problem of loading fuel at extremely high drop points, while also occupying minimal space. Furthermore, the delivery pipe 3 effectively ensures the structural integrity of the fuel elements, improving fuel element reuse rates and reducing the disposal costs of damaged fuel elements.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "height," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A ball-bed type high-temperature stacking and loading device, characterized in that, include: Mounting rack; A clamping member is provided below the mounting frame and is movable relative to the height of the mounting frame. The clamping member is adapted to clamp the opening of the fuel tank or move away from the opening of the fuel tank. The clamping member is provided with a first hole that penetrates the clamping member along the height of the mounting frame. A delivery pipe adapted to carry fuel, the delivery pipe being disposed on the mounting frame and movable in the height direction relative to the mounting frame, the delivery pipe being movably inserted through a first hole; A buffer element, one end of which is disposed inside the delivery pipe and adjacent to the lower end of the delivery pipe, in order to decelerate the fuel in the delivery pipe; The ball-bed type high-temperature stacking device has a first state and a second state. In the first state, the clamping member is movable along the height direction of the mounting frame so that the clamping member presses against the opening of the fuel storage tank. In the second state, the conveying pipe is moved along the height direction of the mounting frame so that the lower end of the conveying pipe moves into the interior of the fuel storage tank. The top end of the mounting frame is provided with a second hole that penetrates the mounting frame along the height direction of the mounting frame. The second hole and the first hole are spaced apart and opposite to each other along the height direction of the mounting frame. The upper end of the conveying pipe passes through the first hole. The delivery pipe includes a first section and a second section connected to each other along the height direction of the mounting frame. One end of the first section passes through a second hole, one end of the second section passes through the first hole and the second section is movable relative to the height direction of the mounting frame. The other end of the second section passes through the first hole. In the second state, the second section moves along the height direction of the mounting frame so that the lower end of the delivery pipe moves into the fuel storage tank. The buffer is multiple and located within the second section. The multiple buffers are arranged in multiple columns at intervals along the circumferential direction of the second section, and each column includes several buffers at intervals along the height direction of the mounting frame.

2. The ball-bed type high-temperature stacking device according to claim 1, characterized in that, The buffer extends radially along the conveying pipe and is inclined toward the bottom of the mounting bracket. The other end of the buffer is radially spaced from the inner circumferential surface of the conveying pipe, and the cross-sectional area of ​​the buffer gradually increases along the inner circumferential surface adjacent to the conveying pipe.

3. The ball-bed type high-temperature stacking device according to claim 1, characterized in that, It also includes a mounting box, which is located inside the mounting frame and is movable relative to the height of the mounting frame. The clamping member is located at the bottom of the mounting box so that the mounting box can drive the clamping member to move along the height of the mounting frame. The conveying pipe is movably inserted through the mounting box.

4. The ball-bed type high-temperature stacking device according to claim 3, characterized in that, Also includes: A first driving member is disposed on the mounting frame and connected to the mounting box, so that in the first state, the first driving member drives the mounting box to move in the height direction of the mounting frame. A second driving member, which is disposed on the mounting box and connected to the delivery pipe, drives the delivery pipe to move in the height direction of the mounting frame in the second state.

5. The ball-bed type high-temperature stacking device according to claim 4, characterized in that, The first driving component includes a first servo motor, a lead screw, and a slider. The first servo motor is mounted on the mounting frame. The lead screw is rotatably mounted on the mounting frame and extends along the height direction of the mounting frame. One end of the lead screw is connected to the output end of the first servo motor. The slider has a threaded hole that passes through the slider along the height direction of the mounting frame. The lead screw passes through the threaded hole and engages with the threaded hole. One end of the slider is mounted on the mounting box. The first servo motor drives the lead screw to rotate, and the lead screw drives the slider to move along the height direction of the mounting frame, thereby moving the mounting box along the height direction of the mounting frame. The second driving component is a second servo motor. The output shaft of the second servo motor, which is fixed on the mounting box, is equipped with a gear. The outer circumferential surface of the conveying pipe is equipped with a rack that meshes with the gear. The rack extends along the height direction of the mounting frame so that the second servo motor can drive the conveying pipe to move through the meshing of the gear and the rack.

6. The ball-bed type high-temperature stacking device according to claim 3, characterized in that, The clamping component includes a sleeve, which is disposed on the bottom surface of the mounting box and the inner circumferential surface of the sleeve defines the first hole. The bottom surface of the mounting box is provided with a third hole that penetrates the mounting box along the height direction of the mounting frame. The third hole communicates with the first hole. In the first state, the lower end of the delivery pipe passes through the third hole and is contained in the first hole. In the second state, the delivery pipe passes through the third hole and the first hole in sequence and moves into the fuel storage tank.

7. The ball-bed type high-temperature stacking device according to claim 3, characterized in that, Also includes: A first linear slide rail and a second linear slide rail are both mounted on the mounting frame and are spaced apart from each other along the width direction of the mounting frame. Both the first linear slide rail and the second linear slide rail extend along the height direction of the mounting frame. A first mating part and a second mating part, wherein the first mating part is disposed on the side of the mounting box adjacent to the first linear slide rail and the first mating part is slidably engaged with the first linear slide rail; and the second mating part is disposed on the side of the mounting box adjacent to the second linear slide rail and the second mating part is slidably engaged with the second linear slide rail. The third and fourth linear slide rails extend along the height direction of the mounting frame and are disposed inside the mounting box. The third and fourth linear slide rails are spaced apart and arranged opposite each other along the width direction of the mounting frame. The third mating part and the fourth mating part are provided. The third mating part is located on one side of the conveying pipe and slides in cooperation with the third linear slide rail. The fourth mating part is located on the other side of the conveying pipe and slides in cooperation with the fourth linear slide rail.

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