An on-line sampling device for pellets

Abstract

The present invention discloses an on-line sampling device for pellets, which includes a sample transfer mechanism, a sampling mechanism and a tray transfer mechanism. The tray transfer mechanism is used to transfer trays between a receiving station and a sampling station. The trays are used to hold pellets. The sampling mechanism is arranged above the tray transfer mechanism and is used to obtain the pellets in the trays. The sample transfer mechanism is used to convey the pellets to an analysis station for analysis. After the tray transfer mechanism receives a tray at the receiving station, it transfers the tray to the sampling station. Then, the sampling mechanism obtains the pellets in the tray and places the pellets on the sample transfer mechanism. The on-line sampling device for pellets has a high degree of automation and does not require personnel to operate in close proximity.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear industry, and particularly relates to an on-line sampling device for pellets. Background Art

[0002] In the field of nuclear fuel pellet production, it is often necessary to sample and analyze the pellets in the tray to determine the physical and chemical properties of the pellets and the feasibility of related production processes. After the analysis is completed, the pellets are returned to the tray. Nuclear fuel pellets have certain radioactivity and high toxicity. When a large number of pellets are gathered in the tray, personnel cannot approach the tray for manual sampling. Therefore, an efficient and convenient fully automatic on-line sampling device for pellets is needed to realize the on-line sampling operation of the pellets. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an on-line sampling device for pellets, aiming at the above deficiencies in the prior art. The on-line sampling device for pellets has a high degree of automation and does not require personnel to operate at close range.

[0004] To solve the above problems, the present invention adopts the following technical solutions:

[0005] An on-line sampling device for pellets includes a sample transfer mechanism, a sampling mechanism and a tray transfer mechanism. The tray transfer mechanism is used to transfer the tray between the receiving station and the sampling station. The tray is used to hold the pellets. The sampling mechanism is arranged above the tray transfer mechanism and is used to obtain the pellets in the tray. The sample transfer mechanism is used to convey the pellets to the analysis station for analysis. After the tray transfer mechanism receives the tray at the receiving station, it transfers the tray to the sampling station. Then the sampling mechanism obtains the pellets in the tray and places the pellets on the sample transfer mechanism.

[0006] Preferably, a sample return station is further arranged between the receiving station and the sampling station. One end of the sample transfer mechanism is arranged directly above the sample return station. After the analysis of the pellets is completed at the analysis station, the pellets are reversely conveyed by the sample transfer mechanism and then fall back into the tray at the sample return station.

[0007] Preferably, both the tray transfer mechanism and the sample transfer mechanism are arranged in the horizontal direction. The sampling mechanism includes a motion unit and a vacuum chuck. The vacuum chuck is used to suck the pellets in the tray. The motion unit is used to drive the vacuum chuck to move in the horizontal and vertical directions.

[0008] Preferably, the motion unit includes a first drive assembly, a second drive assembly, a mounting bracket, a lifting platform, a slide rail, and a rack. The first drive assembly includes a first drive motor, a spline shaft, and a spline gear. The first drive motor is fixed on the mounting bracket, and its output end is connected to one end of the spline shaft. The other end of the spline shaft is rotatably connected to the mounting bracket. The spline gear is sleeved on the spline shaft. The second drive assembly includes a second drive motor, a lifting lead screw, and a first guide rail. The second drive motor is fixed on the mounting bracket, and its output end is connected to the lifting lead screw. The first guide rail is arranged parallel to the lifting lead screw, and the top end of the first guide rail is fixedly installed on the mounting bracket. The lifting platform passes through both the first guide rail and the lifting lead screw at the same time. The spline gear is fixedly installed at the bottom of the lifting platform. The second drive motor drives the lifting lead screw to rotate, thereby driving the lifting platform to perform a linear lifting motion along the first guide rail, and then driving the spline gear to perform a lifting motion along the spline shaft. The slide rail is horizontally laid on the lifting platform, and the rack is installed on the slide rail. The rack meshes with the spline gear, and the vacuum suction cup is installed on the rack. The first drive motor drives the spline shaft to rotate, and the spline gear rotates, thereby driving the vacuum suction cup on the rack to perform a horizontal motion along the direction in which the slide rail is laid.

[0009] Preferably, the tray conveying mechanism includes a third drive assembly, a chassis, a second guide rail, a bracket, and a lead screw structure. The third drive assembly includes a third drive motor. The third drive motor is arranged at one end of the chassis. The lead screw structure includes a transmission lead screw and a transmission nut arranged on the transmission lead screw. The transmission lead screw is arranged on the chassis and is arranged along the length direction of the chassis. One end of the transmission lead screw is connected to the output end of the third drive motor. The second guide rail is installed on the chassis and is arranged parallel to the transmission lead screw. The transmission lead screw is located between the two tracks of the second guide rail. The bracket is slidably arranged on the second guide rail and is used to hold the tray. Its bottom is fixed on the nut of the lead screw structure. The third drive motor drives the transmission lead screw to rotate, thereby driving the bracket to slide on the second guide rail.

[0010] Preferably, a guide block is further arranged on the bracket for positioning the tray.

[0011] Preferably, the sample conveying mechanism includes a fourth drive motor, a conveying unit, and a support bracket. The conveying unit adopts a conveyor belt structure. The conveyor belt structure is arranged on the support bracket. The fourth drive motor is arranged on the support bracket, and its output end is connected to the conveyor belt structure for driving the pulley of the conveyor belt structure to move, thereby driving the conveyor belt structure to move.

[0012] Preferably, the sample transfer mechanism further includes a baffle plate disposed on both sides of the conveyor belt structure for preventing the core blocks from slipping during movement.

[0013] Preferably, the on-line core block sampling device further includes a control mechanism, which includes a controller, a first sensor, a second sensor, and a third sensor. The controller is electrically connected to the first sensor, the second sensor, and the third sensor respectively. The first sensor is disposed at the receiving station for sensing the core blocks in the tray, and when the core blocks on the tray are sensed, a first signal is sent to the controller. The controller is electrically connected to the third driving motor and is used to control the third driving motor to start according to the first signal to transport the tray to the sampling station. The second sensor is disposed at the sampling station for sensing the core blocks in the tray, and when the core blocks in the tray are sensed, a second signal is sent to the controller. The controller is electrically connected to the first driving motor and the second driving motor and is also used to control the first driving motor and the second driving motor to start according to the second signal, thereby controlling the operation of the vacuum suction cup to transfer the core blocks in the tray to the sample transfer mechanism. The third sensor is disposed at the inlet end of the sample transfer mechanism for sensing the core blocks, and when the core blocks are sensed, a third signal is sent to the controller. The controller is electrically connected to the fourth driving motor and is also used to control the fourth driving motor to start according to the third signal to transport the core blocks to the analysis station for analysis.

[0014] The on-line core block sampling device provided by the present invention can realize operations such as automatic receiving of the tray, automatic sampling of the core blocks, and automatic return of the samples, with high automation degree and no need for personnel to operate closely. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the on-line core block sampling device in Embodiment 1 of the present invention;

[0016] Figure 2 is a schematic structural diagram of the tray transfer mechanism in Embodiment 1 of the present invention;

[0017] Figure 3 is a schematic structural diagram of the sampling mechanism in Embodiment 1 of the present invention;

[0018] Figure 4 is a perspective view of the sampling mechanism in Embodiment 1 of the present invention;

[0019] Figure 5 is a schematic structural diagram of the sample transfer mechanism in Embodiment 1 of the present invention.

[0020] In the figure: 1 - tray conveyor mechanism, 2 - sampling mechanism, 3 - sample conveyor mechanism, 11 - third drive motor, 12 - speed reducer, 13 - bracket, 14 - tray, 15 - chassis, 16 - second guide rail, 17 - transmission lead screw, 18 - third mechanical switch, 21 - first drive motor, 22 - mounting frame, 23 - spline gear, 24 - spline shaft, 25 - support, 26 - second drive motor, 27 - lifting lead screw, 28 - lifting platform, 29 - first mechanical switch, 210 - first guide rail, 211 - vacuum chuck, 212 - second mechanical switch, 213 - slide rail, 214 - rack, 31 - fourth drive motor, 32 - synchronous pulley, 33 - support bracket, 34 - synchronous belt, 35 - tension pulley, 36 - baffle plate, 37 - guide groove. Detailed implementation manners

[0021] The following will clearly and completely describe the technical solutions in the present invention with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts belong to the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms such as "upper" indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0023] In the description of the invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] The present invention provides an on-line sampling device for pellets, which includes a sample transfer mechanism, a sampling mechanism, and a tray transfer mechanism. The tray transfer mechanism is used to transfer trays between a receiving station and a sampling station. The trays are used to hold pellets. The sampling mechanism is arranged above the tray transfer mechanism and is used to obtain the pellets in the trays. The sample transfer mechanism is used to transport the pellets to an analysis station for analysis. After the tray transfer mechanism receives a tray at the receiving station, it transfers the tray to the sampling station. Then, the sampling mechanism obtains the pellets in the tray and places the pellets on the sample transfer mechanism.

[0026] Embodiment 1

[0027] As Figure 1 shown, this embodiment discloses an on-line sampling device for pellets, which includes a sample transfer mechanism 3, a sampling mechanism 2, and a tray transfer mechanism 1. The tray transfer mechanism 1 is used to transfer a tray 14 between a receiving station and a sampling station. The tray 14 is used to hold pellets. The sampling mechanism 2 is arranged above the tray transfer mechanism 1 and is used to obtain the pellets in the tray 14. The sample transfer mechanism 3 is used to transport the pellets to an analysis station for analysis. After the tray transfer mechanism 1 receives the tray 14 at the receiving station, it transfers the tray 14 to the sampling station. Then, the sampling mechanism 2 obtains the pellets in the tray 14 and places the pellets on the sample transfer mechanism 3.

[0028] As Figure 2 shown, a sample return station is also provided between the receiving station and the sampling station. One end of the sample transfer mechanism 3 is arranged directly above the sample return station. After sampling is completed, the tray 14 moves to the sample return station. After the pellets are analyzed at the analysis station, they are then reversely transported by the sample transfer mechanism 3 and fall back into the tray 14 on the sample return station.

[0029] As Figure 1 shown, both the tray transfer mechanism 1 and the sample transfer mechanism 3 are arranged horizontally and in parallel, and the sample transfer mechanism 3 is arranged above the tray transfer mechanism 1.

[0030] In this embodiment, the sampling mechanism 2 includes a motion unit and a vacuum chuck 211. The vacuum chuck 211 is used to suck the pellets in the tray 14 when the tray 14 is at the sampling station, and the sucking method is random extraction. The motion unit is used to drive the vacuum chuck 211 to move in the horizontal and vertical directions, so as to extract the pellets at any position in the tray 14.

[0031] In this embodiment, the sampling mechanism further includes a bracket 25, and the bracket 25 is used to connect the vacuum chuck 211 and the motion unit.

[0032] As Figure 3 、 4As shown, the motion unit includes a first drive assembly, a second drive assembly, a mounting bracket 22, a lifting platform 28, a slide rail 213, and a rack 214. The first drive assembly includes a first drive motor 21, a spline shaft 24, and a spline gear 23. Among them, the first drive motor 21 is fixed to the top of the mounting bracket 22, and its output end passes through the mounting bracket 22 and is connected to one end of the spline shaft 24. The other end of the spline shaft 24 is rotatably connected to the bottom of the mounting bracket 22. The spline gear 23 is sleeved on the spline shaft 24 and can move linearly along the axial direction of the spline shaft 24.

[0033] The second drive assembly includes a second drive motor 26, a lifting lead screw 27, and a first guide rail 210. The second drive motor 26 is fixed to the top of the mounting bracket 22, and the second drive motor 26 is arranged in parallel with the first drive motor 21. The output end of the second drive motor 26 passes through the mounting bracket 22 and is connected to the lifting lead screw 27. The first guide rail 210 is arranged in parallel with the lifting lead screw 27, and the top end of the first guide rail 210 is fixedly installed on the mounting bracket 22, and its bottom end extends vertically downward. The lifting platform 28 is simultaneously passed through the first guide rail 210 and the lifting lead screw 27. The spline gear 23 is fixedly installed at the bottom of the lifting platform 28. The second drive motor 26 drives the lifting lead screw 27 to rotate, thereby driving the lifting platform 28 to perform a linear lifting motion along the first guide rail 210, and thus driving the spline gear 23 to perform a lifting motion along the spline shaft 24.

[0034] In this embodiment, the slide rail 213 is horizontally laid on the lifting platform 28, the rack 214 is installed on the slide rail 213, the rack 214 meshes with the spline gear 23, the vacuum chuck 211 is installed on the rack 214, the first drive motor 21 drives the spline shaft 24 to rotate, and the spline gear 23 rotates accordingly, thereby driving the vacuum chuck 211 on the rack 214 to move horizontally along the direction in which the slide rail 213 is laid.

[0035] In this embodiment, under the combined drive of the first drive motor 21 and the second drive motor 26, the vacuum chuck 211 completes vertical and horizontal movements, so that the vacuum chuck 211 can randomly sample any core block in the tray 14.

[0036] Optionally, a first mechanical switch 29 is further provided on the lifting lead screw 27, which is used to directly control the rotation of the lifting lead screw when the second drive motor 26 fails, thereby driving the lifting platform 28 to move.

[0037] Optionally, a second mechanical switch 212 is further provided on the lifting platform 28. The second mechanical switch 212 is mechanically connected to the rack 214 and is used to drive the rack 214 to move when the first drive motor fails, thereby driving the vacuum chuck 211 to move in the horizontal direction.

[0038] As Figure 2As shown in the figure, the tray conveying mechanism 1 includes a third driving assembly, a chassis 15, a second guide rail 16, a bracket 13, and a lead screw structure. Among them, the third driving assembly includes a third driving motor 11 and a speed reducer 12. The third driving motor 11 is arranged at one end of the chassis 15. The lead screw structure includes a transmission lead screw 17 and a transmission nut arranged on the transmission lead screw 17. The transmission lead screw 17 is arranged on the chassis 15 and is set along the length direction of the chassis 15. One end of the transmission lead screw 17 is connected to the output end of the third driving motor 11. The second guide rail 16 is installed on the chassis 15 and is arranged in parallel with the transmission lead screw 17. The transmission lead screw 17 is located between the two tracks of the second guide rail 16. The bracket 13 is slidably arranged on the second guide rail 16 and is used to carry the tray 14. Its bottom is fixed on the nut of the lead screw structure. The third driving motor 11 drives the transmission lead screw 17 to rotate, thereby driving the bracket 13 to slide on the second guide rail 16.

[0039] Optionally, the tray conveying mechanism 1 further includes a third mechanical switch 18. The third mechanical switch 18 is arranged outside the guide rail and is mechanically connected to the bracket 13, and is used to control the movement of the bracket 13 on the guide rail when the third driving motor 11 fails.

[0040] Optionally, the bracket 13 is further provided with guide blocks for positioning the tray 14. There are 4 groups of guide blocks, and each group has two. Each group of guide blocks is installed on each side of the chassis 15, and the shape of the guide block is "L". The tray 14 is placed on the horizontal side of the guide block, and its vertical side is used to prevent the tray 14 from shaking or deviating from the track during transportation.

[0041] As Figure 5 shown in the figure, the sample conveying mechanism 3 includes a fourth driving motor 31, a conveying unit, and a support bracket 33. The conveying unit adopts a conveyor belt structure. The conveyor belt structure includes a synchronous pulley 32, a synchronous belt 34, a tensioning pulley 35, and a support bracket 33. The synchronous pulley 32 is arranged on the support bracket 33. The synchronous belt 34 is wound around the synchronous pulley 32. The tensioning pulley 35 is arranged on the support bracket 33, and the synchronous belt 34 bypasses the tensioning pulley 35. The tensioning pulley 35 is used to adjust the tightness of the synchronous belt 34. The fourth driving motor 31 is arranged on the support bracket 33, and its output end is connected to the synchronous pulley 32, and is used to drive the synchronous pulley 32 to move, thereby driving the synchronous belt 34 to move for transporting the pellets.

[0042] Optionally, the sample conveying mechanism 3 further includes a baffle 36. The baffle 36 is arranged on both sides of the synchronous belt 34 to prevent the pellets from slipping during movement.

[0043] Optionally, the in-line sampling device for pellets may further include a control mechanism, which includes a controller, a first sensor, a second sensor, and a third sensor. The controller is electrically connected to the first sensor, the second sensor, and the third sensor respectively. The first sensor is disposed at the receiving station and is used to sense the pellets in the tray 14. When the pellets on the tray 14 are sensed, a first signal is sent to the controller. The controller is electrically connected to the third driving motor 11 and is used to control the third driving motor 11 to start according to the first signal, so as to transport the tray 14 to the sampling station. The second sensor is disposed at the sampling station and is used to sense the pellets in the tray 14. When the pellets in the tray 14 are sensed, a second signal is sent to the controller. The controller is electrically connected to the first driving motor 21 and the second driving motor 26 and is further used to control the first driving motor 21 and the second driving motor 26 to start according to the second signal, so as to control the operation of the vacuum suction cup 211 to transfer the pellets in the tray 14 to the sample transfer mechanism 3. After sampling is completed, the third sensor is disposed at the entrance end of the sample transfer mechanism 3 and is used to sense the pellets. When the pellets are sensed, a third signal is sent to the controller. The controller is electrically connected to the fourth driving motor 31, and the controller is used to control the fourth driving motor 31 to start according to the third signal, so as to transfer the pellets to the analysis station for analysis.

[0044] The working process of the in-line sampling device for pellets in this embodiment is as follows:

[0045] The receiving station receives the tray 14 containing pellets. After the first sensor senses the tray 14, a first signal is sent to the controller. The controller controls the third driving motor 11 to start according to the first signal, and then transfers the tray 14 to the sampling station;

[0046] When the tray 14 reaches the sampling station, the second sensor located at the sampling station sends a second signal to the controller. The controller is used to control the first driving motor 21 and the second driving motor 26 to start according to the second signal, so as to drive the vacuum suction cup 211 to suck the pellets in the tray 14;

[0047] The vacuum suction cup 211 sucks the pellets onto the sample transfer mechanism 3. The pellets are sensed at the entrance end of the sample transfer mechanism 3, and a third signal is sent to the controller. The controller is used to control the fourth driving motor 31 to start according to the third signal, so as to transfer the pellets to the analysis station for analysis.

[0048] After the pellets are analyzed at the analysis station, the controller controls the third driving motor 11 to start, drives the tray 14 to move to the sample return station, and controls the fourth driving motor 31 to rotate in the reverse direction, so that the pellets return along the sample transfer mechanism 3 until they fall back into the tray 14.

[0049] The in-line sampling device for pellets in this embodiment has a high degree of automation. The transfer of the tray, the conveyance and return of the pellets are completed through the control mechanism. The analysis of the pellets is efficient and fast, and there is no need for personnel to operate closely, so that the operators can stay away from radioactive substances.

[0050] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principles of the present invention. However, 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 regarded as the protection scope of the present invention.

Claims

1. An on-line sampling device for pellets, characterized in that, It includes a sample transfer mechanism (3), a sampling mechanism (2), and a tray transfer mechanism (1). The tray transfer mechanism (1) is used to transfer a tray (14) between a receiving station and a sampling station, and the tray (14) is used to hold the pellets. The sampling mechanism (2) is arranged above the tray transfer mechanism (1) and is used to obtain the pellets in the tray (14). The sample transfer mechanism (3) is used to convey the pellets to an analysis station for analysis. After the tray transfer mechanism (1) receives the tray (14) at the receiving station, it transfers the tray (14) to the sampling station. Then, the sampling mechanism (2) obtains the pellets in the tray (14) and places the pellets on the sample transfer mechanism (3). Both the tray transfer mechanism (1) and the sample transfer mechanism (3) are arranged horizontally. The sampling mechanism (2) includes a motion unit and a vacuum chuck (211). The vacuum chuck (211) is used to suck the pellets in the tray (14), and the motion unit is used to drive the vacuum chuck (211) to move in the horizontal and vertical directions. The motion unit includes a first driving component, a second driving component, a mounting frame (22), a lifting platform (28), a slide rail (213), and a rack (214). The first driving component includes a first driving motor (21), a spline shaft (24), and a spline gear (23). The first driving motor (21) is fixed on the mounting frame (22), and its output end is connected to one end of the spline shaft (24). The other end of the spline shaft (24) is rotatably connected to the mounting frame (22). The spline gear (23) is sleeved on the spline shaft (24). The second driving component includes a second driving motor (26), a lifting lead screw (27), and a first guide rail (210). The second driving motor (26) is fixed on the mounting frame (22). The output end of the second driving motor (26) is connected to the lifting lead screw (27). The first guide rail (210) is arranged in parallel with the lifting lead screw (27), and the top end of the first guide rail (210) is fixedly installed on the mounting frame (22). The lifting platform (28) passes through both the first guide rail (210) and the lifting lead screw (27) at the same time. The spline gear (23) is fixedly installed at the bottom of the lifting platform (28). The second driving motor (26) drives the lifting lead screw (27) to rotate, thereby driving the lifting platform (28) to make a linear lifting motion along the first guide rail (210), and then driving the spline gear (23) to make a lifting motion along the spline shaft (24). The first driving motor and the second driving motor are arranged side by side at the top of the mounting frame. The slide rail (213) is horizontally laid on the lifting platform (28). The rack (214) is installed on the slide rail (213). The rack (214) meshes with the spline gear (23). The vacuum chuck (211) is installed on the rack (214). The first driving motor (21) drives the spline shaft (24) to rotate, and the spline gear (23) rotates, thereby driving the vacuum suction cup (211) on the rack (214) to move horizontally along the direction in which the slide rail (213) is laid. The sample transfer mechanism (3) includes a fourth driving motor (31), a transfer unit, and a support bracket (33). The transfer unit adopts a conveyor belt structure, and the conveyor belt structure is arranged on the support bracket (33). The fourth driving motor (31) is arranged on the support bracket (33), and its output end is connected to the conveyor belt structure for driving the pulley of the conveyor belt structure to move, and further driving the conveyor belt of the conveyor belt structure to move. The sample transfer mechanism (3) further includes a baffle plate (36), and the baffle plate (36) is arranged on both sides of the conveyor belt structure to prevent the core block from slipping during movement. A sample return station is also arranged between the receiving station and the sampling station. One end of the sample transfer mechanism (3) is arranged directly above the sample return station. After the core block is analyzed at the analysis station, it is reversely conveyed by the sample transfer mechanism (3) and then falls into the tray (14) on the sample return station. The sample transfer mechanism (3) further includes a guide groove (37). One end of the guide groove (37) is docked with the end of the conveyor belt structure, and the other end is directly opposite to the sample return station. The guide groove (37) is used to guide the core block that has been analyzed at the analysis station and is reversely conveyed by the conveyor belt structure into the tray (14) on the sample return station.

2. The in-line sampling device for pellets according to claim 1, wherein The tray transfer mechanism (1) includes a third driving assembly, a chassis (15), a second guide rail (16), a bracket (13), and a lead screw structure. The third driving assembly includes a third driving motor (11), and the third driving motor (11) is arranged at one end of the chassis (15). The lead screw structure includes a transmission lead screw (17) and a transmission nut arranged on the transmission lead screw (17). The transmission lead screw (17) is arranged on the chassis (15) and is arranged along the length direction of the chassis (15). One end of the transmission lead screw (17) is connected to the output end of the third driving motor (11). The second guide rail (16) is installed on the chassis (15) and is arranged in parallel with the transmission lead screw (17). The transmission lead screw (17) is located between the two tracks of the second guide rail (16). The bracket (13) slides on the second guide rail (16) for receiving the tray (14), and its bottom is fixed on the transmission nut of the lead screw structure. The third driving motor (11) drives the transmission lead screw (17) to rotate, and further drives the bracket (13) to slide on the second guide rail (16).

3. The on-line sampling device for pellets according to claim 2, wherein The bracket (13) is also provided with a guide block for positioning the tray (14).

4. The on-line sampling device for core blocks according to claim 1, characterized in that it further includes a control mechanism, and the control mechanism includes a controller, a first inductor, a second inductor, and a third inductor. The controller is electrically connected to the first inductor, the second inductor, and the third inductor respectively. The first inductor is arranged at the receiving station and is used to sense the core blocks in the tray (14). When the core blocks on the tray (14) are sensed, a first signal is sent to the controller. The controller is electrically connected to the third driving motor (11) and is used to control the start of the third driving motor (11) according to the first signal so as to transport the tray (14) to the sampling station. The second inductor is arranged at the sampling station and is used to sense the core blocks in the tray (14). When the core blocks in the tray (14) are sensed, a second signal is sent to the controller. The controller is electrically connected to the first driving motor (21) and the second driving motor (26), and is also used to control the start of the first driving motor (21) and the second driving motor (26) according to the second signal, thereby controlling the action of the vacuum chuck (211) to transfer the core blocks in the tray (14) to the sample transfer mechanism (3). The third inductor is arranged at the inlet end of the sample transfer mechanism (3) and is used to sense the core blocks. When the core blocks are sensed, a third signal is sent to the controller. The controller is electrically connected to the fourth driving motor (31), and the controller is used to control the start of the fourth driving motor (31) according to the third signal so as to transfer the core blocks to the analysis station for analysis.

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