A pellet automatic arranging device and fuel rod production system

Abstract

The present invention discloses an automatic pellet lengthening device and a fuel rod production system. The automatic pellet lengthening device comprises a push rod mechanism, a pellet storage mechanism, a lengthening mechanism, a control mechanism, and a pellet transport mechanism. The pellet storage mechanism is used to store pellets. The lengthening mechanism comprises a guide plate and a clamping assembly. The input end of the groove on the guide plate is connected to the pellet storage mechanism. The push rod mechanism is used to push each pellet into the groove. A plurality of pellets are arranged into a pellet row. The control mechanism comprises a controller, a length measuring assembly, and a clamping assembly. The length measuring assembly is used to measure the length of the pellet row on the guide plate and send the length value to the controller. The controller is electrically connected to the clamping assembly and is used to compare the measured length value with the set length value when receiving it. When the measured length value is equal to the set length value, the clamping assembly is controlled to clamp each pellet of the pellet row to the pellet transport mechanism. The device has a high degree of automation and high measurement accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear industry, and in particular relates to an automatic pellet lengthening device and a fuel rod production system comprising the automatic pellet lengthening device. Background Art

[0002] The MOX fuel rods used in fast neutron reactors contain two types of pellets, namely MOX pellets and depleted uranium pellets. MOX pellets and depleted uranium pellets are usually arranged in a certain order and length in the fuel rod cladding tube. There are certain requirements for the length of the two types of pellets in the cladding tube, so before loading, a certain number of pellets need to be arranged and fixed in length.

[0003] In the prior art, the pellet arrangement process before pipe loading often requires manual participation, and since MOX pellets are radioactive, they may endanger the health of operators.

[0004] Therefore, there is an urgent need for a device that can automatically lengthen MOX pellets. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an automatic pellet lengthening device and a fuel rod production system including the automatic pellet lengthening device in view of the above-mentioned deficiencies in the prior art. The automatic pellet lengthening device has high automation and high measurement accuracy.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions:

[0007] A pellet automatic lengthening device comprises a push rod mechanism, a pellet storage mechanism, a lengthening mechanism, a control mechanism, and a pellet transport mechanism. The pellet storage mechanism is used to store pellets. The lengthening mechanism comprises a guide plate and a clamping assembly. A groove for placing pellets is provided on the guide plate. The input end of the groove is connected to the pellet storage mechanism, and the length of the groove is greater than or equal to the sum of the lengths of all pellets in a single fuel rod cladding tube. The push rod mechanism is used to push each pellet from the pellet storage mechanism into the groove of the guide plate in sequence. A plurality of pellets are arranged end to end in the groove to form a pellet row. The control mechanism comprises a controller, a length measuring assembly, and a clamping assembly. The length measuring assembly is electrically connected to the controller and is used to measure the length of the pellet row on the guide plate and send the measured length value to the controller. The controller is electrically connected to the clamping assembly and is used to compare the measured length value with the set length value stored therein when receiving it, and when the measured length value is equal to the set length value, the clamping assembly is controlled to clamp each pellet in the pellet row to the pellet transport mechanism.

[0008] Preferably, the control mechanism also includes a weighing component, which is electrically connected to the controller and is used to measure the weight of the core block column in the groove and send the measured weight value to the controller. The controller is also used to compare the measured weight value with the set weight value stored therein when it is received, and when the measured length value is equal to the set length value and the measured weight value is equal to the set weight value, control the clamping component to clamp each core block of the core block column to the core block transfer mechanism respectively.

[0009] Preferably, the control mechanism further includes a display, and the controller is also electrically connected to the display, and is also used to transmit the received measured length value data and measured weight value data to the display for display.

[0010] Preferably, the core block storage mechanism includes a storage tray, on which a plurality of first storage slots with the same spacing are opened in parallel, a core block is placed in each first storage slot, the push rod mechanism and the discharge mechanism are arranged on both sides of the storage tray, and the inlet end of the storage tray corresponds to the position of the push rod mechanism, and the outlet end of the storage tray is connected to the groove of the discharge mechanism.

[0011] Preferably, the core block storage mechanism further includes a support plate, a first bottom plate, a first linear guide and a first driving electric cylinder, the first linear guide is arranged on the first bottom plate, the first linear guide and the groove are both arranged horizontally, and the length direction of the first linear guide is perpendicular to the length direction of the groove, the storage material tray adopts multiple, and the multiple storage material trays are stacked on the support plate in the vertical direction, the support plate is slidably arranged on the first linear guide, the first driving electric cylinder is used to drive the support plate to move along the length direction of the first linear guide, and the movement mode of the first driving electric cylinder is a stepping mode, and the distance of each movement is the spacing between two adjacent first storage slots, the push rod mechanism is arranged in the horizontal direction and corresponds to the position of the groove, the control mechanism further includes a first proximity sensor, the first proximity sensor is arranged on the first linear guide and corresponds to the position of the groove, and is used to sense the core blocks in the storage material tray, and when the core blocks in the storage material tray are sensed, the first signal is sent to the controller, and the controller is also electrically connected to the push rod mechanism, and is used to control the push rod mechanism to start after receiving the first signal, so that the push rod mechanism pushes the core blocks in the storage material tray into the groove one by one.

[0012] Preferably, the clamping assembly includes a second driving electric cylinder and a clamping jaw, the second driving electric cylinder is arranged above the groove and parallel to the groove along the length direction of the groove, the clamping jaw is fixed on the second driving electric cylinder and is used to clamp the core block placed in the groove. The second driving electric cylinder is used to drive the clamping jaw to move along the length direction of the groove to push the core block to move.

[0013] Preferably, the core block transfer mechanism includes a transfer box and a sliding assembly, the transfer box is provided with a plurality of second storage slots with the same spacing in parallel, the transfer box is connected to the output end of the groove, the sliding assembly includes a second linear guide, a sliding slide, and a third driving electric cylinder, the second linear guide is arranged in the horizontal direction, and the length direction is perpendicular to the length direction of the groove, the transfer box is fixedly mounted on the sliding slide, the sliding slide is slid on the second linear guide, and is fixedly connected to the third driving electric cylinder, the movement mode of the third driving electric cylinder is stepping motion, and the distance it moves each time is the spacing between two adjacent second storage slots, the third driving electric cylinder drives the sliding slide to slide, thereby driving the transfer box to slide along the second linear guide, so that the core blocks in the groove enter each second storage slot of the transfer box one by one.

[0014] Preferably, the core block automatic lengthening device also includes a pushing plate assembly, which includes a second push rod seat, a plurality of second push rods, a fourth driving electric cylinder, and a third linear guide, the length direction of the second push rod seat is parallel to the length direction of the second linear guide, one end of the plurality of second push rods are respectively fixed on the second push rod seat, and are evenly spaced along the length direction of the second push rod seat, and the spacing distance between them is the same as the spacing between two second storage slots adjacent to the transfer box, and the number of the second push rods is the same as the number of second storage slots of the transfer box, the fourth driving electric cylinder is arranged below the second push rod seat and fixedly connected to the second push rod seat, the third linear guide adopts two symmetrical arrangements, the two third linear guides are respectively arranged on both sides of the fourth driving electric cylinder, the two ends of the second push rod seat are respectively slidably arranged on the two third linear guides, and under the drive of the fourth driving electric cylinder, the second push rod seat is The control mechanism further comprises a touch switch and a second proximity sensor, the touch switch being electrically connected to the controller, the touch switch being arranged on a side of the second push rod seat away from the second push rod, when the second push rod seat contacts the touch switch, the touch switch sends a second signal to the controller, the controller is further used to control the third driving electric cylinder to start upon receiving the second signal, so as to move the transfer box along the second linear guide, the second proximity sensor being arranged on the second linear guide, and being at a position corresponding to the touch switch, for sensing the transfer box, and sending a third signal to the controller upon sensing the transfer box, the controller is further electrically connected to the fourth driving electric cylinder, for controlling the fourth driving electric cylinder to start upon receiving the third signal, so that the second push rods on the second push rod seat push out the core blocks in the transfer box at the same time.

[0015] Preferably, the push rod mechanism includes a first push rod seat, a first push rod, and a fifth driving electric cylinder, one end of the first push rod is mounted on the first push rod seat, the first push rod seat is fixed on the fifth driving electric cylinder, the first push rod is used to push the core block in the core block storage mechanism onto the groove under the drive of the fifth driving electric cylinder, the control mechanism also includes a position sensor and a pressure sensor, the position sensor is mounted on the side of the fifth driving electric cylinder and is electrically connected to the controller, and is used to detect the distance value between the first push rod and the fifth driving electric cylinder, and transmit the distance value to the controller, the controller is electrically connected to the fifth driving electric cylinder, and is used to compare the distance value with a set distance value stored therein when receiving the distance value, and control the movement of the fifth driving electric cylinder when the distance value is equal to the set distance value; the pressure sensor is arranged on the first push rod seat and is electrically connected to the controller, and is used to measure the pressure exerted on the first push rod, and transmit the measured pressure value to the controller, and the controller is used to control the moving fifth driving electric cylinder to stop moving when the received pressure value is greater than the pressure threshold stored in the controller.

[0016] The present invention also provides a fuel rod production system, including pellet processing equipment and the above-mentioned pellet automatic lengthening device.

[0017] The core blocks in the present invention are placed on the row length mechanism, and the length of the core block row is measured by the length measuring component, with high measurement accuracy and high efficiency. The core block loading, measuring and unloading processes are all automated without the need for human operation, effectively protecting personnel from radioactive rays. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a pellet automatic lengthening device in an embodiment of the present invention;

[0019] Figure 2 is a schematic structural diagram of a push rod mechanism in an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of a pellet storage mechanism in an embodiment of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the row leader mechanism and the push plate assembly in an embodiment of the present invention;

[0022] Figure 5 is a schematic structural diagram of a pellet transport mechanism in an embodiment of the present invention;

[0023] Figure 6 Schematic diagram of the structure of the clamping assembly in an embodiment of the present invention.

[0024] In the figure: 1-push rod mechanism, 11-first push rod, 12-fifth driving electric cylinder, 13-first push rod seat, 2-core block storage mechanism, 21-storage material tray, 22-support plate, 23-first linear guide, 24-first driving electric cylinder, 25-first bottom plate, 3-groove, 31-length measuring component, 32-weighing component, 4-first proximity sensor, 41-second proximity sensor, 42-position sensor, 43-touch switch, 5-clamping component, 51-clamping claw, 52-second driving electric cylinder, 6-core block transfer mechanism, 61-transfer box, 62-second linear guide, 63-sliding slide, 64-third driving electric cylinder, 7-push plate assembly, 71-second push rod seat, 72-second push rod, 73-third linear guide, 74-fourth driving electric cylinder. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0026] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “upper” and the like are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of the present invention, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The present invention provides a pellet automatic lengthening device, comprising a push rod mechanism, a pellet storage mechanism, a lengthening mechanism, a control mechanism, and a pellet transport mechanism. The pellet storage mechanism is used to store pellets. The lengthening mechanism comprises a guide plate and a clamping assembly. A groove for placing pellets is provided on the guide plate. The input end of the groove is connected to the pellet storage mechanism, and the length of the groove is greater than or equal to the sum of the lengths of all pellets in a single fuel rod cladding tube. The push rod mechanism is used to push each pellet from the pellet storage mechanism into the groove of the guide plate in sequence. A plurality of pellets are arranged end to end in the groove to form a pellet row. The control mechanism comprises a controller, a length measuring assembly, and a clamping assembly. The length measuring assembly is electrically connected to the controller and is used to measure the length of the pellet row on the guide plate and send the obtained measured length value to the controller. The controller is electrically connected to the clamping assembly and is used to compare the measured length value with a set length value stored therein when receiving the measured length value, and when the measured length value is equal to the set length value, the clamping assembly is controlled to clamp each pellet in the pellet row to the pellet transport mechanism.

[0030] The present invention also provides a fuel rod production system, including pellet processing equipment and the above-mentioned pellet automatic lengthening device. Example 1

[0031] like Figure 1 As shown, this embodiment discloses an automatic pellet arranging device, comprising a push rod mechanism 1, a pellet storage mechanism 2, an arranging mechanism, a control mechanism, and a pellet transporting mechanism 6. The pellet storage mechanism 2 is used to store pellets; the row length mechanism includes a guide plate and a clamping assembly 5, the guide plate is provided with a groove 3 for placing pellets, the input end of the groove 3 is connected to the pellet storage mechanism 2, and the length of the groove 3 is greater than or equal to the sum of the lengths of all pellets in a single fuel rod cladding tube; the push rod mechanism 1 is used to push each pellet from the pellet storage mechanism 2 into the groove 3 of the guide plate in sequence, and multiple pellets are arranged end to end in the groove 3 to form a pellet row; the control mechanism includes a controller, a length measuring assembly 31 and a clamping assembly 5, the length measuring assembly 31 is electrically connected to the controller, and is used to measure the length of the pellet row on the guide plate and send the measured length value to the controller, the controller is electrically connected to the clamping assembly 5, and is used to compare the measured length value with the set length value stored therein when receiving it, and when the measured length value is equal to the set length value, control the clamping assembly 5 to clamp each pellet of the pellet row to the pellet transfer mechanism 6 respectively, so as to ensure that the length of the pellets loaded into the cladding tube in the subsequent process can meet the standard.

[0032] In this embodiment, the length measuring assembly 31 is disposed on the side of the guide plate.

[0033] Optionally, in this embodiment, the control mechanism also includes a weighing component 32, which is arranged below the guide plate. The weighing component 32 is electrically connected to the controller and is used to measure the weight of the core block column in the groove 3 and send the measured weight value to the controller. The controller is also used to compare the measured weight value with the set weight value stored therein when receiving the measured weight value, and when the measured length value is equal to the set length value and the measured weight value is equal to the set weight value, control the clamping component 5 to clamp each core block of the core block column to the core block transfer mechanism 6 respectively, so as to ensure that the weight of the core block column loaded into the cladding tube meets the standard, thereby ensuring that the cladding tube after the core blocks are loaded can be within the standard weight range for use in subsequent processes.

[0034] Optionally, the control mechanism also includes a display, and the controller is also electrically connected to the display, and is also used to transmit the received measured length value data and measured weight value data to the display for display, so that the staff can check the length data and weight data of the core block column in real time, and facilitate debugging and experiments.

[0035] In this embodiment, the core block storage mechanism 2 includes a storage tray 21, and a plurality of first storage slots with the same spacing are opened in parallel on the storage tray 21, and a core block is placed in each first storage slot. The push rod mechanism 1 and the discharge mechanism are arranged on both sides of the storage tray 21, and the inlet end of the storage tray 21 corresponds to the position of the push rod mechanism 1, and the outlet end of the storage tray 21 is connected to the groove 3 of the discharge mechanism.

[0036] like Figure 3 As shown, in this embodiment, the core block storage mechanism 2 also includes a support plate 22, a first base plate 25, a first linear guide 23 and a first driving electric cylinder 24. The first base plate 25 is in the shape of a rectangular plate. The first linear guide 23 is arranged on the first base plate 25, and the first linear guide 23 includes two parallel tracks, which are respectively installed on both sides of the first base plate 25. The first driving electric cylinder 24 is installed on the first base plate 25 and is located between the two tracks of the first linear guide 23. The first linear guide 23 and the groove 3 are both horizontally arranged, and the length direction of the first linear guide 23 is perpendicular to the length direction of the groove 3. The support plate 22 is slidably arranged on the first linear guide 23. The first driving electric cylinder 24 is used to drive the support plate 22 to move along the length direction of the first linear guide 23, and the movement mode of the first driving electric cylinder 24 is a stepping mode. The distance of each movement is the distance between two adjacent first storage slots, so as to facilitate pushing each core block in the storage tray 21 into the groove 3 in sequence.

[0037] Specifically, the push rod mechanism 1 and the row length mechanism are arranged on both sides of the storage tray 21, the push rod mechanism 1 is arranged in the horizontal direction and corresponds to the position of the groove 3, and the movement direction of the push rod mechanism 1 is consistent with the length direction of the groove 3. The control mechanism also includes a first proximity sensor 4, which is arranged on the first linear guide rail 23 and corresponds to the position of the groove 3, that is, the push rod mechanism 1 and the groove 3 are on the same straight line, the push rod mechanism 1 and the groove 3 and the first proximity sensor are located in the same vertical plane, the first proximity sensor is used to sense the core blocks in the storage tray 21, and when the storage tray 21 moves on the first linear guide rail 23 to the point where it can sense the core blocks in the storage tray 21, the first signal is sent to the controller, and the controller is also electrically connected to the push rod mechanism 1, and is used to control the push rod mechanism 1 to start after receiving the first signal, so that the push rod mechanism 1 pushes the core blocks in the storage tray 21 into the groove 3.

[0038] Optionally, multiple storage trays 21 are used, and multiple storage trays 21 are stacked in sequence in the vertical direction on the support plate 22. Therefore, a lifting unit is provided on the top of the support plate, and the lifting unit is used to lift the storage tray 21 above it, and the lifting distance each time is the same as the spacing between two adjacent storage trays 21 stacked vertically.

[0039] Specifically, the support plate 22 is driven by the first driving electric cylinder 24 to move from the initial position (the first storage slot at the head end of the top storage tray 21 is aligned with the input end of the groove) along the first linear guide rail 23. With the stepping movement of the first driving electric cylinder 24, the core blocks in each first storage slot of the top storage tray 21 are pushed into the groove one by one. When all the core blocks of the top storage tray 21 are pushed out, the first driving electric cylinder 24 drives the support plate 22 to drive the storage tray 21 to return to the initial position. At this time, the lifting unit lifts the height of one storage tray 21 so that the first storage slot at the head end of the storage tray 21 on the second layer is aligned with the groove. Then, in the same manner as above, the core blocks therein are pushed out into the groove one by one until all the core blocks in the storage tray 21 on the bottom layer are pushed out. At this time, all the core blocks in all the storage trays 21 are unloaded. Figure 6 As shown, the clamping assembly 5 includes a second driving electric cylinder 52 and a clamping jaw 51. The second driving electric cylinder 52 is fixedly installed above the groove 3 and is arranged parallel to the groove 3 along the length direction of the groove 3. The clamping jaw 51 is fixed on the second driving electric cylinder 52 and is used to clamp the core block placed in the groove 3. The second driving electric cylinder 52 is used to drive the clamping jaw 51 to move along the length direction of the groove 3, so as to clamp the core block row in the groove 3 in turn into the core block transfer mechanism 6, so that the core block row can enter the next process.

[0040] like Figure 5As shown, the core block transfer mechanism 6 includes a transfer box 61 and a sliding assembly. The transfer box 61 is provided with a plurality of second storage slots with the same spacing in parallel. The transfer box 61 is connected to the output end of the groove 3. The sliding assembly includes a second linear guide rail 62, a sliding slide 63, and a third driving electric cylinder 64. The second linear guide rail 62 is arranged in the horizontal direction, and its length direction is perpendicular to the length direction of the groove 3. Specifically, the second linear guide rail 62 includes two parallel rails. The third driving electric cylinder 64 is fixedly installed between the two rails. The transfer box 61 is fixedly installed on the sliding slide 63. Two slide grooves are provided at the bottom of the sliding slide 63, and the two slide grooves correspond to the two tracks respectively. The sliding slide 63 is fixedly connected to the third driving electric cylinder 64, and slides along the second linear guide rail 62 under the drive of the third driving electric cylinder 64. The movement mode of the third driving electric cylinder 64 is stepping motion, and the distance it moves each time is the distance between two adjacent second storage slots. The third driving electric cylinder 64 drives the sliding slide 63 to slide, thereby driving the transfer box 61 to slide along the second linear guide rail 62, so that the core blocks in the groove 3 enter each second storage slot of the transfer box 61 one by one.

[0041] Specifically, when the core block column length value data measured by the length measuring component 31 is equal to the set length value inside the controller, the controller controls the second driving cylinder to start, and the clamp 51 clamps the core block and transports it to the transfer box 61. At this time, the controller also controls the push rod mechanism 1 and the storage tray 21 to stop moving. When the transfer box 61 is in the initial position, its first second storage slot is connected to the output end of the groove 3. The clamp 51 clamps the core block at the front end and moves toward the transfer box 61, and loads the core block into the first second storage slot. When the first second storage slot is loaded with core blocks, the controller controls the third driving cylinder to move so that the next second storage slot is connected to the output end of the groove 3. Then, the clamp 51 clamps the next core block and loads it into the second storage slot. In this way, all the second storage slots on the transfer box are filled.

[0042] like Figure 4As shown, the core block automatic arranging device also includes a push plate assembly 7, which includes a second push rod seat 71, a plurality of second push rods 72, a fourth driving electric cylinder 74, and a third linear guide rail 73. The length direction of the second push rod seat 71 is parallel to the length direction of the second linear guide rail 62, and one end of the plurality of second push rods 72 is respectively fixed on the second push rod seat 71, and the plurality of second push rods 72 are evenly spaced along the length direction of the second push rod seat 71, and the spacing distance thereof is the same as the spacing distance between the two second storage slots adjacent to the transfer box 61, and the number of the second push rods 72 is the same as the number of the transfer box 61. 1, the fourth driving electric cylinder 74 is arranged below the second push rod seat 71 and is fixedly connected to the second push rod seat 71, the third linear guide rail 73 includes two symmetrically arranged tracks, the two tracks are arranged on both sides of the fourth driving electric cylinder 74, two sliders are respectively arranged at the two ends of the bottom of the second push rod seat 71, and the two sliders are respectively slid on the two tracks. Driven by the fourth driving electric cylinder 74, the second push rod seat 71 slides on the third linear guide rail 73 and drives the plurality of second push rods 72 to move toward the transfer box 61.

[0043] The control mechanism also includes a touch switch 43 and a second proximity sensor 41. The touch switch 43 is electrically connected to the controller. The touch switch 43 is arranged on the side of the second push rod seat 71 away from the second push rod 72. When the second push rod seat 71 contacts the touch switch 43, the touch switch 43 sends a second signal to the controller. The controller is also used to control the third driving electric cylinder 64 to start when receiving the second signal, so that the transfer box 61 moves along the second linear guide 62. The second proximity sensor 41 is arranged on the second linear guide 62 and is in a position corresponding to the touch switch. It is used to sense the transfer box 61 and send a third signal to the controller when the transfer box 61 is sensed. The controller is also electrically connected to the fourth driving electric cylinder 74. When the third signal is received, it controls the fourth driving electric cylinder 74 to start, so that the second push rods 72 on the second push rod seat 71 push out the core blocks in the transfer box 61 at the same time.

[0044] In this embodiment, when the transfer box 61 completes unloading through the push rod mechanism 1, it returns to the initial position under the drive of the third driving electric cylinder 64. At this time, the second storage groove at the head end of the transfer box 61 is aligned with the groove 3 on the guide rail, so the controller controls the push rod mechanism 1 and the storage tray 21 to start moving.

[0045] like Figure 2As shown, the push rod mechanism 1 includes a first push rod seat 13, a first push rod 11, and a fifth driving electric cylinder 12. One end of the first push rod 11 is installed on the first push rod seat 13, and the first push rod seat 13 is fixed on the fifth driving electric cylinder 12. The first push rod 11 is used to push the core block in the core block storage mechanism 2 onto the groove 3 under the drive of the fifth driving electric cylinder 12. The control mechanism also includes a position sensor 42 and a pressure sensor. The position sensor 42 is installed on the side of the fifth driving electric cylinder 12 and is electrically connected to the controller for detecting the distance value between the first push rod 11 and the fifth driving cylinder 12, and transmitting the distance value to the controller. The controller is electrically connected to the fifth driving cylinder 12 for comparing the distance value transmitted by the position sensor 42 with the set distance value stored therein when receiving the distance value, and controlling the fifth driving cylinder 12 to move when the distance value is equal to the set distance value, thereby preventing the first push rod 11 from axial deviation and causing failure to align with the first storage slot on the storage tray 21, causing damage to the first push rod 11.

[0046] Furthermore, a pressure sensor is provided on the first push rod seat 13 and is electrically connected to the controller, and is used to measure the pressure on the first push rod 11 and transmit the measured pressure value to the controller, and the controller is used to control the fifth driving electric cylinder 12 to stop moving when the received pressure value is greater than the pressure threshold stored in the controller. This situation occurs when the first push rod 11 is stuck in the slot or not aligned with the first material storage tank, and the setting of the pressure sensor forms an overload protection for the first push rod 11.

[0047] In this embodiment, the core blocks in the storage tray 21 are pushed to the row length mechanism for length measurement, and then the measured core blocks are loaded into the transfer box 61, thereby achieving fully automated measurement and loading without the need for personnel to operate the row length, and the length of the core block row is measured by the mechanical vision length measurement component 31, which has high measurement accuracy and high efficiency, ensuring the smooth progress of the subsequent core block loading process. Example 2

[0048] This embodiment discloses a fuel rod production system, including a pellet processing device and the pellet automatic lengthening device in Embodiment 1.

[0049] The pellet processing equipment is used to make pellets.

[0050] In this embodiment, the pellet automatic arranging device is connected to the pellet processing equipment to automatically arrange the processed pellets. Under the action of the second push rod 72, the pellets in the transfer box 61 are simultaneously pushed to the next process equipment, thereby completing the processing of the pellets, and finally loading the processed pellets into the cladding tube.

[0051] The working process of the fuel rod production system is as follows:

[0052] When the first material storage slot of the storage tray 21 is aligned with the groove 3 and the first push rod 11, the controller controls the fifth driving electric cylinder to move, thereby driving the first push rod 11 to push the pellets in the first material storage slot into the groove 3 of the guide plate;

[0053] Furthermore, the storage tray 21 moves stepwise along the first linear guide rail 23 under the drive of the first driving electric cylinder 24, and the distance of each movement is the distance between two adjacent first storage slots. The first push rod 11 pushes the multiple core blocks onto the groove 3, and the multiple core blocks are connected end to end on the groove 3 to form a core block row;

[0054] The length measuring component 31 measures the core block array and sends the measured length value to the controller. When the measured length value is equal to the set length value inside the controller, the controller controls the clamping component 5 to clamp each core block of the core block array to each second storage slot in the transfer box 61;

[0055] When the second proximity sensor 41 senses the transfer box 61, it sends a third signal to the controller. When the controller receives the third signal, it controls the fourth driving cylinder 74 to start, so that each second push rod 72 on the second push rod seat 71 pushes each core block in the transfer box 61 into the next process equipment at the same time.

[0056] The pellets are processed in the next process equipment to meet the loading standards;

[0057] The processed pellets are loaded into the cladding tube.

[0058] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A pellet automatic arranging device, characterized in that: It comprises a push rod mechanism (1), a pellet storage mechanism (2), a row leader mechanism, a control mechanism, and a pellet transport mechanism (6). The pellet storage mechanism (2) is used to store pellets. The row length mechanism comprises a guide plate and a clamping assembly (5), the guide plate being provided with a groove (3) for placing pellets, the input end of the groove (3) being connected to the pellet storage mechanism (2), and the length of the groove (3) being greater than or equal to the sum of the lengths of all pellets in a single fuel rod cladding tube, The push rod mechanism (1) is used to push each core block from the core block storage mechanism (2) into the groove (3) of the guide plate in sequence, and a plurality of core blocks are arranged end to end in the groove (3) to form a core block row. The control mechanism comprises a controller, a length measuring component (31) and a clamping component (5). The length measuring component (31) is electrically connected to the controller and is used to measure the length of the core block row on the guide plate and send the obtained measured length value to the controller. The controller is electrically connected to the clamping assembly (5) and is used to compare the measured length value with a set length value stored therein when the measured length value is received, and when the measured length value is equal to the set length value, control the clamping assembly (5) to clamp each pellet in the pellet row to the pellet transfer mechanism (6) so that the pellet length of the cladding tube into which the MOX fuel rod is loaded in the subsequent process can meet the standard of the MOX fuel rod; The control mechanism further comprises a weighing component (32), the weighing component (32) being electrically connected to the controller and being used for measuring the weight of the core block row in the groove (3) and sending the measured weight value to the controller. The controller is also used to compare the measured weight value with a set weight value stored therein when receiving the measured weight value, and to control the clamping assembly (5) to clamp each core block of the core block row to the core block transfer mechanism (6) when the measured length value is equal to the set length value and the measured weight value is equal to the set weight value; The pellet transfer mechanism comprises a transfer box (61), and the clamping assembly (5) loads the pellets into the transfer box (61). The pellet storage mechanism (2) comprises a storage tray (21), The storage tray (21) is provided with a plurality of first storage slots with the same spacing in parallel, and a core block is placed in each first storage slot. The push rod mechanism (1) and the row length mechanism are arranged on both sides of the storage tray (21), and the inlet end of the storage tray (21) corresponds to the position of the push rod mechanism (1), and the outlet end of the storage tray (21) is connected to the groove (3) of the row length mechanism. The push rod mechanism (1) is arranged in a horizontal direction and corresponds to the position of the groove (3). The control mechanism further comprises a first proximity sensor (4), the first proximity sensor being used to sense the pellets in the storage tray (21), and sending a first signal to the controller when sensing the pellets in the storage tray (21). The controller is also electrically connected to the push rod mechanism (1) and is used to control the push rod mechanism (1) to start after receiving the first signal, so that the push rod mechanism (1) pushes the pellets in the storage tray (21) into the groove (3) one by one; The device further comprises a push plate assembly (7), wherein the push plate assembly (7) comprises a plurality of second push rods (72), wherein each second push rod (72) pushes out each core block in the transfer box (61) simultaneously; The push rod mechanism (1) comprises a first push rod seat (13), a first push rod (11), and a fifth driving electric cylinder (12). One end of the first push rod (11) is mounted on the first push rod seat (13), and the first push rod seat (13) is fixed on the fifth driving electric cylinder (12). The first push rod (11) is used to push the core block in the core block storage mechanism (2) onto the groove (3) under the drive of the fifth driving electric cylinder (12). The control mechanism also includes a position sensor (42) and a pressure sensor. The position sensor (42) is installed on the side of the fifth driving electric cylinder (12) and is electrically connected to the controller, and is used to detect the distance value between the first push rod (11) and the fifth driving electric cylinder (12), and transmit the distance value to the controller. The controller is electrically connected to the fifth driving electric cylinder, and is used to compare the distance value with the set distance value stored therein upon receiving the distance value, and control the fifth driving electric cylinder to move when the distance value is equal to the set distance value; The pressure sensor is disposed on the first push rod seat (13) and is electrically connected to the controller, and is used to measure the pressure exerted on the first push rod (11) and transmit the measured pressure value to the controller. The controller is used to control the fifth driving electric cylinder (12) to stop moving when the received pressure value is greater than a pressure threshold stored in the controller.

2. The automatic pellet arranging device according to claim 1, characterized in that: The control mechanism also includes a display, The controller is also electrically connected to the display, and is also used to transmit the received measured length value data and measured weight value data to the display for display.

3. The automatic pellet arranging device according to claim 1, characterized in that: The core block storage mechanism (2) further comprises a support plate (22), a first bottom plate (25), a first linear guide rail (23) and a first driving electric cylinder (24). The first linear guide rail (23) is arranged on the first bottom plate (25), the first linear guide rail (23) and the groove (3) are both arranged horizontally, and the length direction of the first linear guide rail (23) is perpendicular to the length direction of the groove (3). The storage material tray (21) is provided in plurality, and the plurality of storage material trays (21) are stacked in sequence on the support plate (22) in a vertical direction, and the support plate (22) is slidably mounted on the first linear guide rail (23). The first driving electric cylinder (24) is used to drive the support plate (22) to move along the length direction of the first linear guide rail (23), and the movement mode of the first driving electric cylinder (24) is a stepping mode, and the distance of each movement is the distance between two adjacent first material storage slots. The first proximity sensor (4) is arranged on the first linear guide rail (23) and corresponds to the position of the groove (3).

4. The automatic pellet arranging device according to claim 1, characterized in that: The clamping assembly (5) comprises a second driving electric cylinder (52) and a clamping claw (51). The second driving electric cylinder (52) is arranged above the groove (3) and is arranged parallel to the groove (3) along the length direction of the groove (3). The clamping jaw (51) is fixed on the second driving electric cylinder (52) and is used to clamp the core block placed in the groove (3); the second driving electric cylinder (52) is used to drive the clamping jaw (51) to move along the length direction of the groove (3) to push the core block to move.

5. The automatic pellet arranging device according to claim 4, characterized in that: The pellet transport mechanism (6) further comprises a sliding assembly, The transfer box (61) is provided with a plurality of second material storage slots with the same spacing in parallel, and the transfer box (61) is connected to the output end of the groove (3). The sliding assembly comprises a second linear guide rail (62), a sliding slide (63), and a third driving electric cylinder (64). The second linear guide rail (62) is arranged in a horizontal direction, and its length direction is perpendicular to the length direction of the groove (3). The transfer box (61) is fixedly mounted on the sliding slide (63), the sliding slide (63) is slidably mounted on the second linear guide rail (62), and is fixedly connected to the third driving electric cylinder (64), the movement mode of the third driving electric cylinder (64) is stepping movement, and the distance of each movement is the distance between two adjacent second storage slots. The third driving electric cylinder (64) drives the sliding slide (63) to slide, thereby driving the transfer box (61) to slide along the second linear guide rail (62), so that the core blocks in the groove (3) enter the respective second storage slots of the transfer box (61) one by one.

6. The automatic pellet arranging device according to claim 5, characterized in that: The push plate assembly (7) further comprises a second push rod seat (71), a fourth driving electric cylinder (74), and a third linear guide rail (73). The length direction of the second push rod seat (71) is parallel to the length direction of the second linear guide rail (62); one end of a plurality of second push rods (72) is respectively fixed on the second push rod seat (71) and are evenly spaced along the length direction of the second push rod seat (71); the spacing distance between the second push rods (72) is the same as the spacing distance between two adjacent second material storage slots of the transfer material box (61); and the number of the second push rods (72) is the same as the number of the second material storage slots of the transfer material box (61). The fourth driving electric cylinder (74) is arranged below the second push rod seat (71) and is fixedly connected to the second push rod seat (71). The third linear guide rails (73) are symmetrically arranged in two. The two third linear guide rails (73) are arranged on both sides of the fourth driving electric cylinder (74). The two ends of the second push rod seat (71) are respectively slidably arranged on the two third linear guide rails (73). Under the drive of the fourth driving electric cylinder (74), the second push rod seat (71) slides on the third linear guide rails (73). The control mechanism further comprises a touch switch (43) and a second proximity sensor (41). The touch switch (43) is electrically connected to the controller. The touch switch (43) is arranged on a side of the second push rod seat (71) away from the second push rod (72). When the second push rod seat (71) contacts the touch switch (43), the touch switch (43) sends a second signal to the controller. The controller is further configured to control the third driving electric cylinder (64) to start up when receiving the second signal, so as to move the transfer box (61) along the second linear guide rail (62). The second proximity sensor (41) is disposed on the second linear guide rail (62) and is located at a position corresponding to the touch switch, and is used to sense the transfer box (61), and when sensing the transfer box (61), sends a third signal to the controller. The controller is also electrically connected to the fourth driving electric cylinder (74) and is used to control the fourth driving electric cylinder (74) to start up when receiving the third signal, thereby causing each second push rod (72) on the second push rod seat (71) to push out each core block in the transfer box (61) at the same time.

7. A fuel rod production system, comprising a pellet processing device, characterized in that: It also includes the automatic pellet lengthening device according to any one of claims 1 to 6.

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