Automatic sampling equipment for radioactive material unloading process

Abstract

The invention discloses automatic sampling equipment in a radioactive material unloading process, and relates to the technical field of radioactive material sampling in the nuclear industry, the automatic sampling equipment comprises an equipment box, the equipment box is internally provided with a material receiving assembly, a driving unit and a sampling cylinder barrel; the driving unit is connected with the end part of the sampling cylinder barrel, and the output end of the driving unit extends into the sampling cylinder barrel and is connected with the piston; a discharge hole is formed in the lower side wall of the sampling cylinder barrel; the piston is provided with a material taking channel, and the piston can partially extend out of the sampling cylinder barrel due to displacement, so that the material taking channel enters the material storage device for sampling; and the displacement of the piston enables the material taking channel to be communicated with the material outlet, so that the materials fall off from the material outlet under the action of self gravity. By the adoption of the scheme, automatic sampling in the material conveying process can be achieved, the radiation exposure risk of personnel can be reduced, safe and stable operation under the extreme environment is guaranteed, and powerful technical support is provided for production and quality monitoring of nuclear fuel.

Description

Technical Field

[0001] This invention relates to the field of radioactive material sampling technology in the nuclear industry, and specifically to an automatic sampling device for the unloading process of radioactive materials. Background Technology

[0002] In the nuclear energy field, uranium dioxide, as a major component of nuclear fuel, is crucial for the safe operation and energy efficiency of nuclear power plants, and the control of its purity and quality is essential. Traditional uranium dioxide dispensing systems typically rely on manual sampling, a process that is not only time-consuming and labor-intensive but also carries the risk of radiation exposure and makes it difficult to ensure the accuracy and continuity of powder sampling. With the continuous advancement of nuclear industry technology and increasingly stringent safety standards, the development of an efficient, safe, and easy-to-maintain fully automated sampling system has become an urgent need in the industry.

[0003] While some automated sampling equipment has been applied in other material handling fields, the sampling process for uranium dioxide, a special material, requires consideration of more complex factors. These include, but are not limited to, safety protection in a high-radioactive environment, the radiation resistance of the sampling equipment, ensuring that the sample is not contaminated or altered, and minimizing disruption to the production process. Therefore, designing a fully automated uranium dioxide sampling system that meets stringent safety standards while ensuring sampling efficiency is extremely urgent. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention aims to provide an automatic sampling device for the unloading process of radioactive materials. This solution not only enables automatic sampling during material transportation but also reduces the risk of radiation exposure to personnel, ensuring safe and stable operation in extreme environments and providing strong technical support for nuclear fuel production and quality monitoring.

[0005] This invention is achieved through the following technical solution:

[0006] An automated sampling device for the unloading process of radioactive materials includes:

[0007] The equipment box contains a receiving assembly, a drive unit, and a sampling cylinder.

[0008] The drive unit is connected to the end of the sampling cylinder, and the output end extends into the sampling cylinder and is connected to the piston; the drive unit is used to drive the piston to move along the length of the sampling cylinder; within the stroke range of the piston, the lower side wall of the sampling cylinder has a discharge port, and the discharge port is connected to the top inlet of the receiving assembly below.

[0009] The sampling cylinder extends out of the equipment box at the end furthest from the drive unit and into the storage device; the piston has a material taking channel, and the displacement of the piston can partially extend out of the sampling cylinder, allowing the material taking channel to enter the storage device for sampling; and the displacement of the piston can connect the material taking channel with the discharge port, so that the material falls from the discharge port under its own gravity.

[0010] Compared to existing technologies, the sampling process for radioactive powders such as uranium dioxide requires consideration of more complex factors and involves safety protection issues in high-radioactive environments. This invention provides an automated sampling device for the unloading process of radioactive materials. This solution not only enables automated sampling during material transport but also reduces the risk of radiation exposure for personnel, ensuring safe and stable operation in extreme environments and providing strong technical support for nuclear fuel production and quality monitoring. Specifically, the device includes a sealed enclosure to enclose the sampling process, and the enclosure and several internal components are made of radiation-proof materials. The equipment housing contains a receiving assembly, a drive unit, and a sampling cylinder. The drive unit can be a telescopic cylinder, a hydraulic cylinder, or a servo motor, with a servo motor being preferred. The servo motor transmits power to the piston via an intermediate transmission mechanism. After receiving a control signal from the control system, the servo motor drive system converts the rotational motion into linear motion of the piston through the transmission mechanism. This can be achieved through threaded transmission and limiting piston rotation, or by using a synchronous belt drive. The synchronous belt drive transmits motion through the meshing of equidistant transverse teeth on the inner surface of the belt and corresponding grooves on the pulley, ensuring accurate, slip-free, high-efficiency, high-load-bearing capacity, smooth transmission, and low noise, thus guaranteeing the smoothness and precision of piston movement. The piston movement speed can be continuously adjusted within the range of 0-250 mm / s to meet different sampling requirements, providing high precision, high response speed, and good stability to ensure the precise movement of the piston rod. The piston is made of high-strength, corrosion-resistant materials, such as 304 stainless steel, and is connected to the sampling cylinder via a sliding seal. The piston is driven by the drive unit to slide inside the sampling cylinder. When sampling is required, the piston is pushed to the outside of the sampling cylinder and partially extended. At this time, the piston can partially enter the storage device to receive the material, so that the uranium dioxide powder enters the sampling channel. Then, the piston is controlled to retract, and through precise control, the sampling channel is gradually connected to the discharge port on the lower side of the sampling cylinder. In this way, the uranium dioxide powder can automatically fall out of the discharge port under its own gravity and enter the receiving component to achieve fully automatic protective isolation sampling.

[0011] For further optimization, to facilitate material feeding and automatic material dropping, the sampling cylinder is tilted upwards at the end furthest from the drive unit. In this design, as the piston drives the material back, the material also falls along the inclined plane. The entire sampling cylinder is tilted, such as at an angle of 0-80°, so that all the powder can fall under its own gravity.

[0012] To further optimize the sampling process and control the sampling speed to ensure continuous material sampling, the upper and lower ends of the sampling channel are both connected to the piston, and the lower end of the sampling channel is inclined towards the drive unit. When the piston partially extends out of the sampling cylinder, the upper end of the sampling channel is outside the sampling cylinder, while the lower end is inside the sampling cylinder.

[0013] The displacement of the piston controls the size of the connecting channel between the lower end of the material intake channel and the discharge port. In this design, the material intake channel is inclined relative to the sampling cylinder. When the piston partially extends, the upper end of the material intake channel receives the material falling from above. Since the lower end of the material intake channel is located inside the sampling cylinder, the material can be stored within the material intake channel. By controlling the slow retraction of the piston, the size of the channel between the material intake channel and the discharge port can be controlled, thereby controlling the amount of powder falling and achieving powder sampling speed control, thus avoiding blockages in the lower receiving assembly. Furthermore, the lower end of the material intake channel deviates from the vertical direction and tilts to the right, allowing the powder to fall slowly and uniformly along the slope.

[0014] For further optimization, in order to support the fixed servo motor, the equipment box is also provided with a first motor bracket. The first motor bracket has a first inclined plate at its upper end. The end of the first inclined plate away from the sampling cylinder is inclined downward. A support plate is provided in the middle of the upper side of the first inclined plate. The support plate is perpendicular to the first inclined plate and is connected to the end of the drive unit by bolts. A first reinforcing plate is connected between the back of the support plate and the first inclined plate.

[0015] For further optimization, in order to support the fixed sampling cylinder, the equipment box is also equipped with a cylinder support, which includes a top plate and a second inclined plate, and the top plate is fixedly connected to the top of the equipment box;

[0016] The upper side wall of the sampling cylinder is provided with a docking plate perpendicular to itself, and the second inclined plate is connected to the docking plate by bolts; a second reinforcing plate is connected between the top plate and the second inclined plate.

[0017] Further optimization involves a specific structure for a receiving assembly, which, from bottom to top, consists of a sampling bottle, a hopper, and a discharge pipe. The upper end of the discharge pipe is connected to the outlet of the sampling cylinder, and the lower end is connected to the upper inlet of the hopper. The lower outlet of the hopper is aligned with the upper inlet of the sampling bottle. The hopper has an observation port, allowing for direct observation of the material height. An expansion port or funnel is provided at the upper inlet of the sampling bottle to facilitate material collection. The sampling bottle is placed on a discharge receiving tray, and a weight detection system is located at the bottom of the tray. This system weighs the sampling bottle to control the amount of material sampled.

[0018] Further optimization, to filter out large pieces of powder and facilitate maintenance, includes a discharge pipe connected to the outlet of the sampling cylinder. The lower end of the discharge pipe is connected to the upper end of the drop pipe via a maintenance flange, and a filter screen is installed at the maintenance flange location to filter the falling material. In this design, a vertical discharge pipe is installed at the outlet of the sampling cylinder. The ends of the discharge pipe and the drop pipe are connected by two maintenance flanges, with a filter screen held between them. The filter screen can be inserted laterally to achieve the connection. Large pieces of material are screened out through the filter screen to prevent blockage of the lower channel; the filter screen can also be replaced and maintained.

[0019] For further optimization, a height detection sensor is installed at the material discharge pipe to detect the height of the material inside the hopper. The height detection sensor is preferably an ultrasonic sensor.

[0020] To further optimize the process and control the opening and closing of the bottom outlet of the silo as well as the size of the outlet, an electric ball valve is provided at the lower outlet of the silo. The electric ball valve is used to control the opening and closing of the lower outlet of the silo.

[0021] Further optimization involves preventing material agglomeration through stirring within the silo. A stirring motor is installed on one side of the silo, with its output end extending laterally into the silo side wall, the extended portion equipped with stirring blades. The connection between the stirring motor's output end and the silo side wall is achieved via a flange bearing seat and sealed with a sealing ring. In this design, the stirring motor is supported by a second motor bracket; its output end is laterally connected to a bearing seat at a through-hole in the silo side wall, extending into the silo to stir the material using the stirring blades.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] 1. The present invention provides an automatic sampling device for the unloading process of radioactive materials. It is a fully automatic sampling system designed specifically for uranium dioxide unloading systems. This system can not only realize automatic sampling during the material transportation process, but also significantly improve the efficiency and safety of sampling operations by controlling the sampling quantity, responding quickly to operation commands, and ensuring safe and stable operation in extreme environments. It also reduces the risk of radiation exposure to personnel and provides strong technical support for the production and quality monitoring of nuclear fuel.

[0024] 2. This invention provides an automated sampling device for the unloading process of radioactive materials. It achieves a high degree of automation and intelligence through a high-performance microcontroller and touchscreen display module, enabling convenient input of user commands and intuitive display of equipment operating status, greatly improving the automation level and ease of operation of the sampling process. It also achieves precise control; the control system can accurately control the operation of the servo motor and stirring motor, ensuring the accuracy and stability of the sampling action. Simultaneously, a high-precision ultrasonic sensor can monitor the material status in real time, providing strong support for accurate sampling.

[0025] 3. The automatic sampling device for the unloading process of radioactive materials provided by the present invention is corrosion resistant and durable; key components such as the piston mechanism are made of corrosion resistant 304 stainless steel, which can maintain stable performance and long service life in harsh working environments, thereby improving the reliability and durability of the equipment.

[0026] 4. The automatic sampling device for the unloading process of radioactive materials provided by this invention can achieve efficient sampling; the servo motor drive system, in conjunction with the transmission mechanism, can drive the piston to move up and down rapidly, achieving efficient material sampling. Simultaneously, it can achieve long-term sampling, and the material channel is rationally designed to ensure smooth material flow and avoid blockages and residues.

[0027] 5. This invention provides an automatic sampling device for the unloading process of radioactive materials. By monitoring the signals of ultrasonic sensors, the control system can monitor the material status in real time, preventing equipment failures or safety accidents caused by material accumulation or blockage. Furthermore, the overall design considers corrosion resistance and durability, further enhancing the safety and reliability of the equipment. The modular design makes each component relatively independent, facilitating disassembly and replacement. Simultaneously, the touchscreen display module provides detailed equipment status information, aiding in quick problem identification and maintenance. Moreover, after parameter setting, one-button start allows for sampling into the sampling bottle. Sampling time, weight, etc., are adjustable within a certain range, and the entire sampling process is automated. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0029] Figure 1 A schematic diagram of the overall structure of the automatic sampling device for the unloading process of radioactive materials provided by the present invention;

[0030] Figure 2 A cross-sectional view of the piston provided for this invention;

[0031] Figure 3 A cross-sectional view of the sampling cylinder provided by the present invention;

[0032] Figure 4 A schematic diagram of the structure of the first motor bracket provided by the present invention;

[0033] Figure 5 This is a schematic diagram of the cylinder support structure provided by the present invention;

[0034] Figure 6 This is a side view of the cylinder support provided by the present invention.

[0035] The attached diagram shows the markings and corresponding component names:

[0036] 1-Equipment box, 2-Drive unit, 3-Sampling cylinder, 301-Discharge pipe, 4-Piston, 401-Material collection channel, 5-First motor bracket, 501-First inclined plate, 502-Support plate, 503-First reinforcing plate, 6-Cylinder bracket, 601-Top plate, 602-Second inclined plate, 603-Second reinforcing plate, 7-Discharge pipe, 8-Maintenance flange, 9-Filter screen, 10-Height detection sensor, 11-Agitator motor, 12-Flange bearing seat, 13-Electric ball valve, 14-Hopper, 15-Sampling bottle, 16-Second motor bracket, 17-Discharge receiving tray. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0038] Example 1: This Example 1 provides an automatic sampling device for the unloading process of radioactive materials, such as... Figures 1-6 As shown, it includes:

[0039] Equipment box 1, wherein the equipment box 1 is provided with a receiving assembly, a drive unit 2 and a sampling cylinder 3;

[0040] The drive unit 2 is connected to the end of the sampling cylinder 3, and the output end extends into the sampling cylinder 3 and is connected to the piston 4; the drive unit 2 is used to drive the piston 4 to move along the length direction of the sampling cylinder 3; within the stroke range of the piston 4, the lower side wall of the sampling cylinder 3 has a discharge port, and the discharge port is connected to the top inlet of the receiving assembly below.

[0041] The sampling cylinder 3 extends out of the equipment box 1 at the end away from the drive unit 2 and extends into the storage device; the piston 4 has a material taking channel 401, and the displacement of the piston 4 can partially extend out of the sampling cylinder 3, so that the material taking channel 401 enters the storage device for sampling; and the displacement of the piston 4 can connect the material taking channel 401 with the discharge port, so that the material falls from the discharge port under its own gravity.

[0042] Compared to existing technologies, the sampling process for radioactive powders such as uranium dioxide requires consideration of more complex factors and involves safety protection issues in high-radioactive environments. This invention provides an automated sampling device for the unloading process of radioactive materials. This solution not only enables automated sampling during material transport but also reduces the risk of radiation exposure to personnel, ensuring safe and stable operation in extreme environments and providing strong technical support for nuclear fuel production and quality monitoring. Specifically, the device includes a sealed enclosure 1 to enclose the sampling process, and both the enclosure and its internal components are made of radiation-proof materials. The equipment housing 1 contains a receiving assembly, a drive unit 2, and a sampling cylinder 3. The drive unit 2 can be a telescopic cylinder, a hydraulic cylinder, or a servo motor, preferably a servo motor. The servo motor transmits power to the piston 4 via an intermediate transmission mechanism. After receiving a control signal from the control system, the servo motor drive system converts the rotational motion into linear motion of the piston 4 via the transmission mechanism. This can be achieved through threaded transmission and limiting the rotation of the piston 4, or by using a synchronous belt drive. The synchronous belt drive transmits motion through the meshing of equidistant transverse teeth on the inner surface of the belt and corresponding grooves on the pulley, ensuring accurate transmission, no slippage, high transmission efficiency, strong load-bearing capacity, smooth transmission, and low noise, thus ensuring the smoothness and precision of the piston 4's movement. The piston 4's movement speed can be continuously adjusted within the range of 0-250 mm / s to meet different sampling requirements, providing high precision, high response speed, and good stability to ensure the precise movement of the piston 4 push rod. The piston 4 is made of high-strength, corrosion-resistant materials, such as 304 stainless steel, and is connected to the sampling cylinder 3 via a sliding seal. Driven by the drive unit 2, the piston 4 slides inside the sampling cylinder 3. When sampling is required, the piston 4 is pushed to the outer end of the sampling cylinder 3 and partially extended. At this time, the piston 4 can partially enter the storage device to receive the material, so that the uranium dioxide powder enters the sampling channel 401. Then, the piston 4 is controlled to retract, and the sampling channel 401 is gradually connected to the discharge port on the lower side of the sampling cylinder 3 through precise control. In this way, the uranium dioxide powder can automatically fall out of the discharge port under its own gravity and enter the receiving component to achieve fully automatic protective isolation sampling.

[0043] In this embodiment, as Figure 1 As shown, to facilitate material pushing and automatic material dropping, the sampling cylinder 3 is inclined upwards at the end furthest from the drive unit 2. In this design, during the process of the piston 4 driving the material back, the material can also fall down along the inclined plane. The entire sampling cylinder 3 is inclined, such as at an angle of 0-80°, so that all the powder can fall under its own gravity.

[0044] In this embodiment, as Figure 1 and Figure 2As shown, in order to achieve sampling and control the sampling speed during sampling to ensure the continuity of material sampling, the upper and lower ends of the sampling channel 401 are both through the piston 4, and the lower end of the sampling channel 401 is inclined towards the drive unit 2, so that when the piston 4 partially extends out of the sampling cylinder 3, the upper end of the sampling channel 401 is outside the sampling cylinder 3, while the lower end is inside the sampling cylinder 3.

[0045] The displacement of the piston 4 controls the size of the connecting channel between the lower end of the material intake channel 401 and the discharge port. In this design, the material intake channel 401 is inclined relative to the sampling cylinder 3. Thus, when the piston 4 partially extends, the upper end of the material intake channel 401 receives the material falling from above. Since the lower end of the material intake channel 401 is located inside the sampling cylinder, the material can be stored in the material intake channel 401. By controlling the slow retraction of the piston 4, the size of the channel between the material intake channel 401 and the discharge port can be controlled, thereby controlling the amount of powder falling and achieving powder sampling speed control, thus avoiding blockages in the lower receiving assembly. Furthermore, the lower end of the material intake channel 401 deviates from the vertical direction and tilts to the right, so that when the powder falls, it can fall slowly and uniformly along the slope.

[0046] In this embodiment, as Figure 4 As shown, to support and fix the servo motor, the equipment box 1 is also provided with a first motor bracket 5. The first motor bracket 5 has a first inclined plate 501 on its upper end. The end of the first inclined plate 501 away from the sampling cylinder 3 is inclined downward. A support plate 502 is provided in the middle of the upper side of the first inclined plate 501. The support plate 502 is perpendicular to the first inclined plate 501 and is connected to the end of the drive unit 2 by bolts. A first reinforcing plate 503 is connected between the back of the support plate 502 and the first inclined plate 501.

[0047] In this embodiment, as Figure 1 , Figure 5 and Figure 6 As shown, in order to support and fix the sampling cylinder 3, the equipment box 1 is also provided with a cylinder support 6. The cylinder support 6 includes a top plate 601 and a second inclined plate 602. The top plate 601 is fixedly connected to the top of the equipment box 1.

[0048] The upper side wall of the sampling cylinder 3 is provided with a docking plate perpendicular to itself, and the second inclined plate 602 is connected to the docking plate by bolts; a second reinforcing plate 603 is connected between the top plate 601 and the second inclined plate 602.

[0049] Example 2: This Example 2 further defines the material receiving assembly based on Example 1, providing a specific structure, such as... Figure 1 As shown.

[0050] The receiving assembly consists of a sampling bottle 15, a hopper 14, and a discharge pipe 7 arranged sequentially from bottom to top. The upper end of the discharge pipe 7 is connected to the outlet of the sampling cylinder 3, and the lower end is connected to the upper inlet of the hopper 14. The lower outlet of the hopper 14 is aligned with the upper inlet of the sampling bottle 15. The hopper 14 is equipped with an observation port, through which the material height can be visually observed. The upper inlet of the sampling bottle 15 is equipped with an enlarged diameter or a funnel to facilitate material collection. The sampling bottle 15 can be placed on the discharge receiving tray 17, and a weight detection system is provided at the bottom of the discharge receiving tray 17 to weigh the sampling bottle 15 and control the amount of material sampled.

[0051] In this embodiment, to filter out large pieces of powder and facilitate maintenance, a discharge pipe 301 is connected to the outlet of the sampling cylinder 3. The lower end of the discharge pipe 301 is connected to the upper end of the drop pipe 7 via a maintenance flange 8, and a filter screen 9 is provided at the position of the maintenance flange 8. The filter screen 9 is used to filter the falling material. In this solution, a vertical discharge pipe 301 is provided at the outlet of the sampling cylinder 3. The end of the discharge pipe 301 and the end of the drop pipe 7 are connected by two maintenance flanges 8, and the filter screen 9 is clamped between the two maintenance flanges 8. The filter screen 9 can be inserted horizontally to achieve connection. Large pieces of material are screened out by the filter screen 9 to avoid blockage of the lower channel. The filter screen 9 can also be replaced and maintained.

[0052] In this embodiment, a height detection sensor 10 is also provided at the material discharge pipe 7 to detect the height of the material in the hopper 14. The height detection sensor 10 is used to detect the height of the material inside the hopper 14. Preferably, the height detection sensor 10 is an ultrasonic sensor.

[0053] In this embodiment, in order to control the opening and closing of the bottom outlet of the regulating hopper 14 and the size of the outlet, an electric ball valve 13 is provided at the lower outlet of the hopper 14. The electric ball valve 13 is used to control the opening and closing of the lower outlet of the hopper 14.

[0054] In this embodiment, to prevent material agglomeration in the silo 14 by stirring, a stirring motor 11 is also provided on one side of the silo 14. The output end of the stirring motor 11 extends laterally into the side wall of the silo 14, and the extended part is equipped with stirring blades. The connection between the output end of the stirring motor 11 and the side wall of the silo 14 is achieved through a flange bearing seat 12 and sealed by a sealing ring. In this design, the stirring motor 11 is supported by a second motor bracket 16. The output end of the stirring motor 11 is laterally connected to the bearing seat at the through hole in the side wall of the silo 14, so as to extend into the silo 14 and stir the material by stirring blades.

[0055] In this embodiment, the solution also includes a control system, comprised of a touchscreen display module. This system integrates an advanced touchscreen display module, a branded PLC system and software system, a digital input / output module, a microcontroller, and a sampling system control system incorporating various sensors and actuators. This system not only features an intuitive and user-friendly graphical user interface but also integrates fault diagnosis and alarm functions to ensure the accuracy, efficiency, and safety of the sampling process. It includes:

[0056] (1) Touch screen display module, 7-inch high-definition display screen: adopts high-resolution display technology to provide a clear and delicate visual experience and ensure that the operation interface is intuitive and easy to understand.

[0057] (2) Graphical User Interface (GUI): It is designed with a user-friendly human-computer interaction interface, which allows users to easily set the sampling quantity, sampling time, and parameters for multiple samplings (including the amount of sample stored in the silo and the interval time each time), while displaying the current sampling status, weight information and operation prompts in real time.

[0058] (3) Brand PLC system and software system: High-performance PLC: It has powerful data processing capabilities and stable operating performance to ensure the efficient operation of the control system.

[0059] (4) Software system: The accompanying software system supports flexible programming and configuration to meet users' customized needs, while providing data recording, analysis and reporting functions to facilitate subsequent data processing and quality traceability.

[0060] The control system uses a high-performance microcontroller to receive instructions from the touchscreen, control the operation of the servo motor and the stirring motor 11, and monitor the signal of the height detection sensor 10. The touchscreen display module provides an intuitive user interface for setting sampling parameters and displaying the current sampling status. The control system monitors the signal of the height detection sensor 10 in real time to determine the height of the material in the hopper 14. When the material falls, it can accurately detect the material and its height, and centralize the data to the control system. When the material reaches a certain height in the hopper 14 and is detected, sampling stops, and the piston 4 moves upward to close the outlet.

[0061] Working principle of this invention:

[0062] When sampling is required, the control system controls the drive unit 2, i.e., the servo motor, to move the piston 4 in the sampling cylinder 3, so that the upper end of the sampling channel in the piston 4 is outside the sampling cylinder 3 and located in the storage device to receive the material falling from above. The material can enter the sampling channel for storage.

[0063] After receiving the material, the servo motor controls the piston 4 to slowly retract and gradually connect the lower end of the sampling channel with the discharge pipe 301 on the lower side of the sampling cylinder 3. By controlling the size of the connection gap, the sampling speed is controlled. A larger gap results in a faster sampling speed, while a smaller gap results in a slower sampling speed. This control can prevent the accumulation and blockage of the lower pipe.

[0064] The falling material first passes through the filter screen 9 to filter out large pieces, and then falls into the hopper 14. After the height detection sensor 10 detects that the material has reached a certain height, it sends a feedback signal, and the control system controls the piston 4 to move upward and push out to close the discharge port and stop sampling.

[0065] The rotating motor is then driven to rotate continuously, stirring the material inside the hopper 14 to prevent it from clumping.

[0066] When sampling is required, triggering the touch key or button will automatically open the electric ball valve 13, allowing the material to fall into the sampling bottle 15 to complete the sampling.

[0067] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic sampling device for the unloading process of radioactive materials, characterized in that, include: Equipment box (1), the equipment box (1) is provided with receiving assembly, drive unit (2) and sampling cylinder (3); The drive unit (2) is connected to the end of the sampling cylinder (3), and the output end extends into the sampling cylinder (3) and is connected to the piston (4); the drive unit (2) is used to drive the piston (4) to move along the length direction of the sampling cylinder (3); within the stroke range of the piston (4), the lower side wall of the sampling cylinder (3) has a discharge port, and the discharge port is connected to the top inlet of the receiving assembly below; The sampling cylinder (3) extends out of the equipment box (1) at the end away from the drive unit (2) and extends into the storage device; the piston (4) has a material taking channel (401), and the displacement of the piston (4) can partially extend out of the sampling cylinder (3), so that the material taking channel (401) enters the storage device for sampling; and the displacement of the piston (4) can connect the material taking channel (401) and the discharge port, so that the material falls from the discharge port under its own gravity.

2. The automatic sampling device for the unloading process of radioactive materials according to claim 1, characterized in that, The sampling cylinder (3) is tilted upward at the end away from the drive unit (2).

3. The automatic sampling device for the unloading process of radioactive materials according to claim 2, characterized in that, The upper and lower ends of the material taking channel (401) are both through the piston (4), and the lower end of the material taking channel (401) is inclined toward the drive unit (2), so that when the piston (4) partially extends out of the sampling cylinder (3), the upper end of the material taking channel (401) is outside the sampling cylinder (3), while the lower end is inside the sampling cylinder (3). The displacement of the piston (4) can control the size of the connecting channel between the lower end of the material feeding channel (401) and the discharge port.

4. An automatic sampling device for the unloading process of radioactive materials according to claim 2, characterized in that, The equipment box (1) is also provided with a first motor bracket (5), the upper end of the first motor bracket (5) is provided with a first inclined plate (501), the end of the first inclined plate (501) away from the sampling cylinder (3) is inclined downward; a support plate (502) is provided in the middle of the upper side of the first inclined plate (501), the support plate (502) is perpendicular to the first inclined plate (501) and is connected to the end of the drive unit (2) by bolts; a first reinforcing plate (503) is connected between the back of the support plate (502) and the first inclined plate (501).

5. An automatic sampling device for the unloading process of radioactive materials according to claim 2, characterized in that, The equipment box (1) is also provided with a cylinder support (6), which includes a top plate (601) and a second inclined plate (602). The top plate (601) is fixedly connected to the top of the equipment box (1). The upper side wall of the sampling cylinder (3) is provided with a docking plate perpendicular to itself, and the second inclined plate (602) is connected to the docking plate by bolts; a second reinforcing plate (603) is connected between the top plate (601) and the second inclined plate (602).

6. An automatic sampling device for the unloading process of radioactive materials according to claim 1, characterized in that, The receiving assembly consists of a sampling bottle (15), a hopper (14), and a discharge pipe (7) arranged sequentially from bottom to top. The upper end of the discharge pipe (7) is connected to the outlet of the sampling cylinder (3), and the lower end is connected to the upper inlet of the hopper (14). The lower outlet of the hopper (14) is aligned with the upper inlet of the sampling bottle (15).

7. An automatic sampling device for the unloading process of radioactive materials according to claim 6, characterized in that, The sampling cylinder (3) is also connected to a discharge pipe (301) at its discharge port. The lower end of the discharge pipe (301) is connected to the upper end of the discharge pipe (7) via a maintenance flange (8). A filter screen (9) is also provided at the location of the maintenance flange (8). The filter screen (9) is used to filter the falling material.

8. An automatic sampling device for the unloading process of radioactive materials according to claim 6, characterized in that, A height detection sensor (10) is also provided at the material drop pipe (7), which is used to detect the material height inside the hopper (14).

9. An automatic sampling device for the unloading process of radioactive materials according to claim 6, characterized in that, An electric ball valve (13) is provided at the lower outlet of the silo (14), and the electric ball valve (13) is used to control the opening and closing of the lower outlet of the silo (14).

10. An automatic sampling device for the unloading process of radioactive materials according to claim 9, characterized in that, A stirring motor (11) is also provided on one side of the silo (14). The output end of the stirring motor (11) extends laterally from the side wall of the silo (14), and the extended part is equipped with stirring blades. The output end of the stirring motor (11) and the side wall of the silo (14) are connected by a flange bearing seat (12) and sealed by a sealing ring.

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