A sealed radioactive dry resin remote sampling device

Abstract

The present application relates to a kind of sealed radioactive dry resin remote sampling device, belong to radioactive waste resin sampling technical field.The horizontal transport channel of the device is equipped with rack, and the lower end of sampler is connected with inner end;Horizontal sleeve of sampler is equipped with indexing gear, and lower outlet is had in middle section, and sampling shaft is equipped in pipe body and constitutes moving pair with it;The upper surface of the guide base plate of translation trolley has guide slot, and the roller of support shielding block is embedded in guide slot;The driving gear of vertical motor on the side of guide base plate is engaged with rack;The upper central part of shielding block is embedded sampling bottle, and the bottom side is fixedly connected with draw pin.The present application realizes material transfer under the condition of no one, does not produce secondary waste, avoids aerosol diffusion, and has good security.

Description

Technical Field

[0001] This invention relates to a sampling device, specifically a sealed remote sampling device for radioactive dry resin, belonging to the field of radioactive waste resin sampling technology. Background Technology

[0002] During the operation of third-generation pressurized water reactor nuclear power plants, the loop cooling water, spent fuel pool water, and process wastewater are all purified using ion exchange resins. When the resins become ineffective, they need to be replaced. Therefore, nuclear power plants generate a considerable amount of waste resin that requires proper handling, and sampling and analysis is an indispensable part of the process. Because waste resin sampling devices operate in a high-radiation environment for extended periods, high requirements are placed on the stability, sealing, accuracy, reliability, and automation of the sampling devices.

[0003] A search reveals that Chinese patent document application number 202222495477 discloses a fully automatic dry resin sampling device, including a resin feeding tank containing dry resin, a sampling pipeline, a sample delivery pipeline, a sample receiving pipeline, and a gas treatment pipeline. The sampling pipeline is equipped with a resin sampler and a temporary storage bottle; the sample delivery pipeline is equipped with a fan and a cyclone separator; the sample receiving pipeline is equipped with a sample receiving tube and a shielding tank; and the gas treatment pipeline is equipped with a high-pressure turbine fan and a dryer. While this technical solution can replace manual operation by automatically sampling, delivering, and receiving samples, as well as processing the gas, it suffers from the problem of generating secondary waste gas that needs to be recycled into other systems for treatment. Furthermore, its equipment requires high interconnectivity, which is not conducive to ensuring stable sampling results. Summary of the Invention

[0004] The purpose of this invention is to provide a sealed, remote sampling device for radioactive dry resin that operates independently and generates no secondary waste, addressing the problems existing in the prior art.

[0005] To achieve the above objectives, the basic technical solution of the sealed radioactive dry resin remote sampling device of the present invention is as follows: it includes a horizontal transfer channel passing through a shielding wall on a support, a rack covered by a sealing cover extending along the length direction on the transfer channel, the inner end of which is connected to the lower end of the sampler, and an external docking station that is connected to the transfer trolley via a translation trolley. The sampler includes a rotatable horizontal sleeve mounted on the upper end of a hollow column. The horizontal sleeve is equipped with a rotary gear that is connected to a horizontal motor for transmission. The middle section has a discharge port that communicates with a discharge pipe supported in the hollow column. The tube body is equipped with a sampling shaft that forms a sliding pair with the shaft. The outer end of the sampling shaft has a sampling recess, and the inner end is connected to the telescopic end of a sampling cylinder. The sampling shaft has a sampling position where the sampling recess extends into the connecting pipe and a position where the sampling recess retracts and aligns with the discharge port. The guide base plate of the translation trolley, which is equipped with casters, has a guide groove on its upper surface that is parallel to the axial direction of the casters. A roller supporting the shield block is embedded in the guide groove. A drive gear driven by a vertical motor is installed on one side of the guide base plate. The drive gear meshes with the rack. A sampling bottle is embedded in the upper center of the shield block.

[0006] A further improvement of the present invention is that a capping mechanism is installed at the lower end of the discharge tube. The capping mechanism includes a capping cylinder installed on the side of the discharge tube via a support frame fixed to the discharge tube. The downward telescopic end of the capping cylinder is fixed to the capping tube, which is loosely fitted at the lower end of the discharge tube, via a connecting plate. The lower end of the capping tube has a capping edge, which can further ensure that the sampling bottle receives the sample in a sealed state.

[0007] A further improvement to this invention is that the sampling pipe of the connecting pipe has interface flanges at both its upper and lower ends for connecting to the radioactive dry resin delivery pipeline. The sampling pipe has a sampling port corresponding to the protruding position of the sampling shaft. A baffle plate and a water baffle plate, which can automatically close the sampling port, are hinged inside the sampling pipe. Therefore, it can effectively prevent pipeline cleaning water and large-area aerosols from entering the sampler gaps.

[0008] A further improvement to the present invention is that a pull stud is fixedly connected to one side of the bottom of the shielding block; the body of the transfer trolley has a push-pull lock hook that forms a horizontal moving pair with it, the push-pull lock hook is composed of a rod body and a hook head adapted to the pull stud; the body of the trolley also has a guide rail that can dock with the guide groove on the guide base plate of the translation trolley, thereby ensuring smooth transfer of the sampling bottle.

[0009] A further improvement of the present invention is that when the sampling shaft is in the position to be rotated and rotates 180° with the horizontal sleeve, the sampling concave is directly opposite the discharge port.

[0010] A further improvement to this invention is that a vibrator is installed at the lower part of the discharge pipe. Vibration can promote material discharge through the pipe, prevent material from accumulating on the inner wall of the pipe, and reduce the residue rate.

[0011] A further improvement to the present invention is that the discharge port of the horizontal sleeve is connected to the discharge pipe through a funnel opening.

[0012] This invention enables quantitative sampling, is waterproof and dustproof, and achieves unmanned material transfer by utilizing the automatic movement function of a translation trolley. No secondary waste is generated during the entire dry resin sampling process, and aerosol diffusion is avoided, demonstrating excellent safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present invention; Figure 2 for Figure 1 AA section enlarged structural schematic diagram; Figure 3 for Figure 1 A magnified schematic diagram of the sampler; Figure 4 for Figure 1 An enlarged structural schematic diagram of the docking pipe in the embodiment; Figure 5 for Figure 1 A schematic diagram of the docking structure between the sampler and the sampling bottle in the embodiment; Figure 6 for Figure 1 A schematic diagram of the automatic transfer mechanism in the embodiment; Figure 7 for Figure 1 A schematic diagram of the structure of the transfer trolley removing the shielding block in the embodiment.

[0014] In the diagram: 1. Connecting pipe; 2. Sampler; 3. Sampling bottle; 4. Shielding container; 5. Translation trolley; 6. Transfer channel; 7. Transfer trolley; 8. Interface flange; 9. Sampling pipe; 10. Water baffle; 11. Material baffle; 12. Sampling spigot; 13. Sampling shaft; 14. Sleeve; 15. Sampling cylinder; 16. Indexing gear; 17. Horizontal motor; 18. Feed pipe; 19. Vibrator; 20. 21. Covering mechanism; 22. Shielding block; 23. Pull pin; 24. Stop block; 25. Roller; 26. Vertical motor; 27. Stop post; 28. Drive gear; 29. ​​Caster wheel; 30. Proximity switch; 31. Guide base plate; 32. Proximity switch; 33. Sealing cover; 34. Rack; 35. Positioning mechanism; 36. Bracket; 37. Sealing cover plate; 38. Guide rail; 39. Push-pull lock hook; 30. Caster wheel. Implementation Example

[0015] The sealed radioactive dry resin remote sampling device of this embodiment is as follows: Figure 1 and Figure 2 As shown, a horizontal transfer channel 6 supported on a bracket 35 passes through a shielding wall, with a rack 33 mounted in the middle of its upper part, enclosed within a sealing cover 32 extending along its length. The inner end of the transfer channel 6 is connected to the lower end of the sampler 2, and the exterior has a docking station for transfer via a translation trolley 5 and a transfer trolley 7. The upper end of the sampler 2 is connected to a vertical docking connector 1, which connects to a radioactive dry resin delivery pipeline.

[0016] The specific structure of sampler 2 is as follows: Figure 3As shown, the device includes a rotatable horizontal sleeve 14 mounted on the upper end of a hollow column 2-1. The middle of the horizontal sleeve has a discharge port 14-1 that communicates with a discharge pipe 18 supported in the hollow column 2-1 via a funnel opening 18-1. The horizontal sleeve 14 is externally fitted with a rotary gear 16 that is driven by a horizontal motor 17 mounted on the upper part of the hollow column 2-1. A sampling shaft 13, forming a sliding pair with the shaft, is mounted inside the sleeve. The outer end of the sampling shaft 13 has a sampling recess 13-1, and its inner end is connected to the telescopic end of a sampling cylinder 15. Therefore, under the action of the sampling cylinder 15, the sampling shaft 13 has a sampling position where the sampling recess extends into the docking pipe 1, and a ready-to-rotate position where the sampling recess retracts to align with the discharge port. When the sampling concave 13-1 extends into the docking pipe 1, it collects the flowing dry resin sample; then it retracts into the horizontal sleeve 14. When the motor drives the horizontal sleeve 14 to rotate 180°, the sampling concave 13-1 is directly opposite the discharge port 14-1, and the collected dry resin sample is poured into the discharge pipe 18. The lower part of the discharge pipe 18 is equipped with a vibrator 19 to facilitate more efficient material discharge; the lower end of the discharge pipe 18 is equipped with a capping mechanism 20.

[0017] The specific structure of docking and take-off 1 is as follows: Figure 4 As shown, the sampling pipe 9 has interface flanges 8 at both the upper and lower ends. The sampling pipe 9 has a sampling port 12 at the position where the sampling shaft 13 extends. The sampling pipe 9 is internally fitted with a baffle plate 11 and a water baffle plate 10 that can automatically close the sampling port 12 by gravity.

[0018] For the specific structure of the translation trolley 5, please refer to Figure 5 and Figure 6 The guide base plate 30, equipped with casters 28 at the bottom, has two guide grooves on its upper surface parallel to the axial direction of the casters 28. Rollers 24 supporting the shielding block 21 are embedded in the grooves. A drive gear 27 driven by a vertical motor 25 is mounted on one side of the guide base plate 30. This drive gear meshes with a rack 33 fixed on the bracket 35. A sampling bottle is embedded in the upper center of the shielding block 21, and a pull stud 22 is fixed to one side of the bottom. Therefore, the vertical motor 25 can drive the guide base plate 30, together with the shielding block 21 and the sampling bottle, to move between the lower end of the sampler 2 along the length of the bracket 35 and the docking position after passing through the shielding wall. The pull stud 22 can be hooked and pulled by the hook of the push-pull lock hook 38, so that the shielding block 21 and the sampling bottle are moved out of the bracket 35 at the docking position. The capping mechanism 20 includes capping cylinders 20-1 mounted on both sides of the discharge pipe 18 via a support frame 20-2 fixed to the discharge pipe 18. The downward telescopic end of the capping cylinder 20-1 is fixed to the capping tube 20-4, which is loosely fitted at the lower end of the discharge pipe 18, via a connecting plate 20-3. Therefore, driven by the capping cylinder 20-1, the capping tube 20-4 can be raised and lowered as needed, and the capping edge 20-5 at the lower end presses and seals the edge of the sampling bottle mouth (see...). Figure 5After the transfer trolley reaches its position, the positioning mechanism 34, through a cylinder lifting the positioning pin, cooperates with the translation trolley 5 to fix the position of the translation trolley. The secondary structures used in the figure to limit the position of the translation trolley, such as the stop block 23, the stop post 26, and the proximity switch 31, are easy to understand and will not be described in detail.

[0019] The specific structure of the transfer trolley 7 is as follows: Figure 7 As shown, the upper surface of the vehicle body has a push-pull lock hook 38 that forms a horizontal sliding pair with it. The push-pull lock hook 38 consists of a rod body and a hook head that is adapted to the pull pin 22. The upper surface of the vehicle body also has a guide rail that can be connected to the guide groove on the guide base plate 30 of the translation trolley 5. Therefore, the shielding block 21 with the sampling bottle embedded on the translation trolley 5 can be pulled onto the transfer trolley 7 by means of the push-pull lock hook 38. The transfer trolley 7 has a sealing cover plate 36 for the guide rail 37 and other structures that are basically the same as the transfer trolley disclosed in Chinese Patent Application No. 202310128302.6, and will not be described again.

[0020] The specific sampling steps in this embodiment are as follows: S1. Pipeline connection - The upper side of the connecting pipe 1 is connected to the external dry resin discharge pipe through the interface flange 8. The side is provided with a sampling port 12 to connect with the sampler 2. The baffle plate 10 is fixedly installed on the side wall of the sampling pipe 9. The baffle plate 11 is installed on the side wall of the sampling pipe through a shaft, and the lower edge of the baffle plate 10 covers the upper edge of the baffle plate 11.

[0021] S2. Resin Sampling – The sampling shaft 13 of the sampler 2 has a sampling groove with a fixed volume at its front end, which can hold a fixed volume of material. After the sampling bottle is installed in place, the cylinder 20 descends, the discharge pipe connects with the sampling bottle, and the sampling bottle cap is pressed to ensure a seal. Then, the sampling shaft 13 is driven by the cylinder piston rod 15 to extend into the connecting pipe 1 for sampling. During sampling, the sampling shaft pushes open the baffle plate 11 and extends into the sampling pipe 9 to receive the material. It retracts after 5-10 seconds. The sleeve 14 is connected to the motor 17 through the indexing gear 16. After it is in place, the sampling shaft 13 and the sleeve 14 are flipped and discharged under the action of the motor driven by the motor 17. The resin sample enters the sampling bottle 3 below through the discharge pipe 18. During the discharge process, the discharge pipe 18 is vibrated by the vibrator 19 to ensure that the resin sample can completely enter the sampling bottle 3.

[0022] S3. Sampling Bottle Transportation – After the sampling bottle receives the sample, cylinder 20 rises, disengaging the feed tube from the sampling bottle. The sampling bottle 3 is tightly placed in the shielding container 4, which is then placed on the translation trolley 5. A proximity switch 29 triggers a signal indicating that the shielding container 4 has reached its designated position, and the stop block 23 is mechanically limited by the stop post 26. The translation trolley 5 is placed in the sealed transfer channel 6. The drive motor 25 drives the gear 27 along the rack 33, moving the translation trolley 5 along the guide path in the transfer channel to the designated sampling point. A proximity switch is triggered, and the positioning mechanism 34, through a cylinder lifting the positioning pin, engages with the translation trolley 5 to achieve positioning, thus ending the transportation process.

[0023] S4. Sampling bottle enters the transfer trolley for receiving – Pushing the transfer trolley 7 into the fixed receiving point triggers the positioning switch 31, releasing the sampling bottle receiving function. Pushing the push-pull locking mechanism 38 connects with the shielding container pull pin 22, transferring the shielding container 4 to the transfer trolley 7. Pushing the cover plate 36 moves it along the guide rail 37 until it completely covers the opening of the shielding container. At this point, the receiving work is completed, and the sample is manually sent to the laboratory for analysis. The transfer trolley 7 moves via the casters 39.

[0024] Compared with the prior art, the present embodiment has the following significant advantages: 1. No secondary waste is generated during the entire dry resin sampling process, and the equipment can operate independently without relying on other equipment.

[0025] 2. A waterproof baffle and a dustproof baffle are installed inside the sampling tube. They will automatically open when sampling and automatically close when not sampling to prevent water or dust from entering the sampler.

[0026] 3. This invention uses a cylinder to drive the sampler to extend and retract, and the pressure is controllable and adjustable to prevent resin from jamming the sampler; an auxiliary vibrator is provided to assist the material feeding through the pipeline, which enhances the feeding effect.

[0027] 4. A self-propelled transfer trolley is configured, which improves the automation level of the equipment.

[0028] 5. A transfer channel is configured to effectively prevent the spread of aerosols during the transfer process and improve the protection level of the equipment.

[0029] In addition to the embodiments described above, the present invention may have other implementations. All technical solutions formed by equivalent substitution or equivalent transformation fall within the protection scope claimed by the present invention.

Claims

1. A sealed remote sampling device for radioactive dry resin, characterized in that: It includes a horizontal transfer channel on the support that passes through the shielding wall, the transfer channel being equipped with a rack covered by a sealing cover extending along the length direction, the inner end of which is connected to the lower end of the sampler, and the outer side having a docking station that is connected to the transfer trolley via a translation trolley; The sampler includes a rotatable horizontal sleeve mounted on the upper end of a hollow column. The horizontal sleeve is equipped with a rotary gear connected to a horizontal motor, and has a discharge port in the middle section that communicates with a discharge pipe supported in the hollow column. The tube body is equipped with a sampling shaft that forms a sliding pair with the sampler. The outer end of the sampling shaft has a sampling recess, and the inner end is connected to the telescopic end of a sampling cylinder. The sampling shaft has a sampling position where the sampling recess extends into the connecting pipe and a ready-to-rotate position where the sampling recess retracts and aligns with the discharge port. The guide base plate of the translation trolley, equipped with casters, has guide grooves on its upper surface parallel to the caster axis. Rollers supporting the shielding block are embedded in these guide grooves. A drive gear driven by a vertical motor is mounted on one side of the guide base plate, meshing with the rack. A sampling bottle is embedded in the upper center of the shielding block. A capping mechanism is installed at the lower end of the discharge pipe. This mechanism includes a capping cylinder mounted beside the discharge pipe via a support frame fixed to it. The downward-facing telescopic end of the capping cylinder is fixed to a capping tube fitted onto the lower end of the discharge pipe via a connecting plate. The lower end has a pressure cap flange; the upper and lower ends of the sampling pipe of the docking connector have interface flanges for connecting to the radioactive dry resin delivery pipeline, the sampling pipe has a sampling port at the position where the sampling shaft extends, and the sampling pipe is fitted with a baffle plate that can automatically close the sampling port; the bottom side of the shielding block is fixedly connected with a pull stud; the body of the transfer trolley has a push-pull lock hook that forms a horizontal moving pair with it, the push-pull lock hook is composed of a rod body and a hook head that is adapted to the pull stud; the body of the trolley also has a guide rail that can dock with the guide groove on the guide base plate of the translation trolley.

2. The sealed radioactive dry resin remote sampling device according to claim 1, characterized in that: When the sampling shaft is in the ready-to-rotate position and rotates 180° with the horizontal sleeve, the sampling concave is directly opposite the discharge port.

3. The sealed radioactive dry resin remote sampling device according to claim 2, characterized in that: A vibrator is installed at the bottom of the feed pipe.

4. The sealed radioactive dry resin remote sampling device according to claim 3, characterized in that: The discharge port of the horizontal sleeve is connected to the discharge pipe through a funnel opening.

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