A fully automatic radioactive substance sampling device

Abstract

The present application relates to a kind of full-automatic radioactive material sampling equipment, belong to radioactive material processing equipment field.The equipment includes upper support sampling device, middle part is equipped with liquid receiving device, lower part is equipped with lifting device and can be pushed into storage and transport device frame body;The fixed plate of sampling device is fixedly connected with cover-shaped connecting sleeve, and is provided with several exhaust holes, the upper end of fixed plate central insertion fixed blanking tube passes through connecting sleeve and is communicated with the lower end of quantitative collection tube, the upper end of quantitative collection tube is communicated with one end of exhaust pipe, the other end of exhaust pipe is communicated with the side wall of connecting sleeve by detour;Quantitative collection tube side is communicated with discharge pipe and feed pipe by discharge valve and feed valve respectively;Storage and transport device contains transfer trolley that can be pushed;Lifting device contains lifting frame inside extension bearing guide rail platform's receiving arm.The present application guarantees that sampling process is completely in shielding state, and safely and reliably completes radioactive material sampling storage and transport.

Description

Technical Field

[0001] This invention relates to a sampling device, and more particularly to a radioactive material sampling device, belonging to the field of radioactive material processing equipment. Background Technology

[0002] During the routine operation of a nuclear power plant, it is necessary to sample the emitted radioactive materials and analyze them in the laboratory to determine their radioactivity levels, types and amounts of nuclides, corrosiveness, etc., in order to handle them properly. Current sampling techniques require manual entry into the sampling environment while taking various protective measures, including wearing protective clothing. This still carries the potential for hazards to personnel, such as residual waste liquid and exposure to protective equipment.

[0003] A search reveals that Chinese patent application number 201710173791.1 discloses a waste resin sampling device. This device uses a hydraulic telescopic rod to individually remove the sampling bottle from a shielded container, lift it to the sampling port, and then return the radioactive waste resin sampling bottle to the shielded container after sampling. Furthermore, Chinese patent application number 202020375519.1 discloses a remote automatic resin sampling device suitable for third-generation nuclear power technology, employing a linear reciprocating single-cylinder chamber sampling mode. All of these existing technologies suffer from the drawback of the bottle being exposed to air, making it impossible to completely avoid radiation hazards. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the aforementioned technologies by proposing a radioactive material sampling device that avoids the bottle opening being exposed during the sampling process, thereby effectively preventing radiation leakage and ensuring safety.

[0005] To achieve the above objectives, the basic technical solution of the radioactive material sampling device of the present invention is as follows: a frame including an upper supporting sampling device, a middle equipped with a liquid receiving device, and a lower equipped with a lifting device that can be pushed into a storage and transportation device.

[0006] The sampling device's fixing plate is sealed and fixed to the upper platform of the frame by a sealing ring. The upper surface of the fixing plate is sealed and fixed to a cover-shaped connecting sleeve, and the area covered by the connecting sleeve has several exhaust holes. A vertical feed pipe is inserted and fixed in the center of the fixing plate. The upper end of the feed pipe passes through the connecting sleeve and is connected to the lower end of the quantitative collection pipe through a feed valve. The upper end of the quantitative collection pipe is connected to one end of the exhaust pipe through an exhaust valve. The other end of the exhaust pipe is connected to the side wall of the connecting sleeve. One side of the quantitative collection pipe is connected to the discharge pipe and the feed pipe through a discharge valve and a feed valve, respectively.

[0007] The storage and transportation device includes a movable transfer trolley. The trolley platform is supported on the front side by a liftable guide rail platform and on the rear side by a fixed guide groove bracket. The guide rail platform supports a shielded container whose inner cavity is adapted to the sampling bottle and whose top can be covered by a shielded cover. The guide groove bracket supports shielded cover guide grooves that extend forward and backward. The shielded cover and the shielded cover guide grooves form a horizontal moving pair.

[0008] The lifting device includes a vertical cylinder installed at the lower part of the frame. The telescopic end of the cylinder is fixedly connected to the lifting frame, and the inner side of the lifting frame extends out to form a support arm that supports the guide rail platform.

[0009] With this invention, the flow direction of the sampling medium in the pipeline can be controlled by each valve, and the quantitative sample can be automatically collected into the sampling bottle. Since the sampling bottle is placed in the shielded container, it can be raised and lowered as needed. The sampling process does not leave the storage and transportation device, thus ensuring that the sampling process is completely shielded. Finally, the sampling bottle is transferred by the storage and transportation trolley, and the sampling and storage of radioactive materials is completed safely and reliably.

[0010] The present invention is further improved as follows:

[0011] The frame is also equipped with a liquid receiving device, which includes a rotating arm that is hinged at one end to a mounting base fixed to the frame, a liquid tray fixed at the other end of the rotating arm, a retractable end of a cylinder near the mounting base, and another end of the cylinder hinged to another part of the frame.

[0012] The front side of the trolley platform on the transfer trolley is supported by a vertical guide rod, and the guide rod and the linear bearing fixed under the trolley platform form a vertical sliding pair.

[0013] The rear side of the shielding cover is hinged to the telescopic end of the electric push rod installed at the rear end of the transfer trolley.

[0014] The lifting frame is equipped with rollers on its upper and lower sides, which are in contact with the uprights of the frame.

[0015] The transfer trolley has an adjuster consisting of horizontal limit bolts located below its front legs.

[0016] One side of the frame forms an opening facing the transfer trolley, and horizontal guide plates are fixed on both sides of the opening. The flared opening formed by the two horizontal guide plates is adapted to the two sides of the guide rail platform.

[0017] The side of the frame furthest from the transfer trolley is equipped with a limit block and a positioning sensor. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the basic structure of one embodiment of the present invention.

[0019] Figure 2 yes Figure 1 The right view.

[0020] Figure 3 yes Figure 1 A schematic diagram of the initial state of the three-dimensional structure.

[0021] Figure 4 yes Figure 3 A three-dimensional structural diagram showing the sampling device in its sampling state with the outer cover removed.

[0022] Figure 5 yes Figure 1 A schematic diagram of the sampling device structure in the embodiment.

[0023] Figure 6 yes Figure 4 A schematic diagram of the lower side view structure.

[0024] Figure 7 yes Figure 1 A schematic diagram of the lifting device in the embodiment.

[0025] Figure 8 yes Figure 1 A schematic diagram of the liquid receiving tray opening and closing structure in the embodiment.

[0026] Figure 9 yes Figure 1 A partially enlarged structural diagram of the sampling device in the embodiment.

[0027] Figure 10 yes Figure 1 A top view of the frame structure of the embodiment.

[0028] In the diagram: Sampling device 1, discharge valve 101, feed valve 102, exhaust valve 103, discharge valve 104, feed pipe 105, discharge pipe 106, exhaust pipe 107, fixing plate 108, sealing ring 109, quantitative collection pipe 111, discharge pipe 112, connecting sleeve 113, storage and transportation device 2, transfer trolley 201, shielding cover guide groove 202, shielding container 203, shielding cover 204, trolley platform 205, sampling... Sample bottle 206, guide rail platform 207, guide rod 208, linear bearing 209, electric push rod 211, guide groove bracket 212, adjuster 213, liquid receiving device 3, mounting base 301, cylinder 302, rotating arm 303, liquid receiving tray 304, lifting device 4, cylinder 401, roller 402, lifting frame 403, frame body 5, horizontal guide plate 501, limit block 502, position sensor 503, upper platform 504. Detailed Implementation

[0029] The basic structure of the radioactive material sampling equipment in this example is as follows: Figure 1 and Figure 2As shown, the upper part of the frame 5 supports and installs the sampling device 1, the middle part is equipped with the liquid receiving device 3, the lower part is equipped with the lifting device 4, and the lower part of the frame 5 can be pushed into the storage and transportation device 2.

[0030] The specific structure of sampling device 1 is as follows: Figure 3 and Figure 4 as well as Figure 9 As shown, the upper platform 504 of the frame 5 is sealed and fixedly connected to the fixing plate 108 via a sealing ring 109. The upper surface of the fixing plate 108 is sealed and fixedly connected to a cover-shaped connecting sleeve 113. The area of ​​the fixing plate 108 covered by the connecting sleeve 113 has several exhaust holes, and a vertical feed pipe 112 is inserted and fixed in the center of the hole. The upper end of the feed pipe 112 passes through the connecting sleeve 113 and is connected to the lower end of the quantitative collection pipe 111 via the feed valve 104. The upper end of the quantitative collection pipe 111 is connected to one end of the exhaust pipe 107 via the exhaust valve 103. The other end of the exhaust pipe 107 is connected to the side wall of the connecting sleeve 113. One side of the quantitative collection pipe 111 is connected to the discharge pipe 106 and the feed pipe 105 via the discharge valve 101 and the feed valve 102, respectively. During the preparation phase, the feed valve 102 and the discharge valve 101 are opened simultaneously, allowing the radioactive material to enter through the feed pipe 105. After passing through the feed pipe 105, the feed valve 102, and the quantitative collection pipe 111, the radioactive material flows back to the main pipeline through the discharge valve 101 and the discharge port 106. After circulating in the above loop for a period of time, the quantitative collection pipe 111 is ensured to be full of radioactive material. Then, the feed valve 102 and the discharge valve 101 are closed.

[0031] The specific structure of storage and transportation device 2 is as follows: Figure 3 , Figure 4 and Figure 6 As shown, the movable transfer trolley 201 has a trolley platform 205 whose front side is supported by a vertical guide rod 208, and a guide groove bracket 212 fixed at the rear. The guide rod 208 and the linear bearing 209 fixed to the trolley platform 205 form a vertical sliding pair. The guide rail platform 207 supports a shielding container 203 whose inner cavity is adapted to the sampling bottle 206 and whose top can be covered by the shielding cover 204. The guide groove bracket 212 supports two shielding cover guide grooves 202 extending back and forth. The rear side of the shielding cover 204 is hinged to the telescopic end of the electric push rod 211 installed at the rear of the transfer trolley, and both sides form horizontal sliding pairs with the shielding cover guide grooves 202 respectively. After the transfer trolley is pushed into the frame, the shielding cover can be opened in a controlled manner as needed, allowing the shielding container to be lifted. In addition, an adjuster 213 consisting of horizontal limit bolts is provided under the front legs of the transfer trolley 201 to facilitate the adjustment of the trolley position as needed, so that the sampling bottle mouth above is aligned with the discharge port.

[0032] The specific structure of the liquid receiving device 3 is as follows: Figure 8As shown, the device includes a rotating arm 303 hinged at one end to a mounting base 301 fixed to the frame 5, and a liquid tray 304 fixedly connected to the other end of the rotating arm 303. The rotating arm 303 is hinged to the telescopic end of a cylinder 302 near the mounting base 301, and the other end of the cylinder 302 is hinged to another part of the frame 5 via a mounting block 301'. Therefore, driven by the cylinder, the liquid tray 304 can rotate as needed between the liquid receiving position (shown by the solid line) below the discharge pipe 112 and the clearance position (shown by the dashed line) under the rotation of the rotating arm 303, to prevent residual liquid from dripping onto the storage and transportation device.

[0033] The specific structure of the lifting device 4 is as follows: 4 and Figure 7 As shown, it includes vertical cylinders 401 respectively installed on both sides of the lower part of the frame 5. The telescopic end of the cylinder 401 is fixedly connected to the lifting frame 403. The inner side of the lifting frame 403 extends out to support the guide rail platform 207, and rollers 402 that fit against the columns of the frame 5 are installed on the upper and lower sides respectively. Therefore, the cylinder can be controlled to make the guide rail platform 207 supported on it rise and fall smoothly as needed under the guidance of the linear bearing 209 through the lifting frame 403.

[0034] Frame 5 is generally a three-dimensional frame structure, such as Figure 10 As shown, one side of the platform faces the open trolley 201, and horizontal guide plates 501 are fixed on both sides. The flared gap formed by the two horizontal guide plates is adapted to both sides of the guide rail platform 207. A limit block 502 and a positioning sensor 503 are installed on the side away from the trolley 201.

[0035] During the sampling operation, the storage and transportation device 2, which carries the sampling bottle 206, is first pushed into the frame 5 along the trolley guide groove 501 until it contacts the predetermined position of the limiting plate 502. After the sensor 503 sends a signal that the trolley has arrived, the electric telescopic rod 211 drives the shielding cover 204 to move along the guide groove 202 to be fully opened. The liquid receiving tray 3 is controlled to rotate from the liquid receiving position to the open position. Then, the cylinder 401 of the lifting device 4 causes the lifting frame 403 to lift the fixed platform 207 of the storage and transportation device 2 upward until the discharge pipe 112 is inserted into the bottle mouth of the sampling bottle 206. The shielding container 203 is sealed and attached to the sealing ring 109 on the lower surface of the fixed plate 108. Subsequently, the feed valve 104 and exhaust valve 103 are opened, and the radioactive material in the quantitative collection tube 111 falls into the sampling bottle 206 under the action of gravity. The air in the bottle is discharged into the exhaust pipe 107 through the exhaust perforation of the fixing plate 108 (see...). Figure 9 ).

[0036] After sampling is completed, operate the opposite action to exit the storage and transportation trolley 2 and send the sampling bottle 206 to the sampling and analysis laboratory according to the set route to complete the required automatic sampling process.

[0037] During the sampling process, because the upper surface of the shielding container 206 is tightly attached to the sealing ring 109, the radioactive material to be discharged is isolated from the outside environment. During the discharge process, the air in the sampling bottle is discharged into the exhaust pipe 107, ensuring smooth sampling. In fact, the lifting device, liquid receiving device, and sampling device in this embodiment are all equipped with signal feedback. Therefore, according to the operational requirements, a series of operations such as opening and closing the valve body of the sampling device, opening and closing the liquid receiving tray, raising and lowering the lifting device, and opening and closing the shielding cover can be completed in sequence to achieve fully automatic and safe sampling of radioactive materials.

[0038] Experiments show that this embodiment greatly improves the safety, efficiency, and automation of radioactive material sampling, and can effectively meet the needs of nuclear power plants for automated radioactive material sampling.

Claims

1. A radioactive material sampling device, characterized in that: It includes a frame that supports the sampling device at the top, has a liquid receiving device in the middle, and has a lifting device at the bottom that can be pushed into the storage and transportation device; The sampling device's fixing plate is sealed and fixed to the upper platform of the frame by a sealing ring. The upper surface of the fixing plate is sealed and fixed to a cover-shaped connecting sleeve, and the area covered by the connecting sleeve has several exhaust holes. A vertical feed pipe is inserted and fixed in the center of the fixing plate. The upper end of the feed pipe passes through the connecting sleeve and is connected to the lower end of the quantitative collection pipe through a feed valve. The upper end of the quantitative collection pipe is connected to one end of the exhaust pipe through an exhaust valve. The other end of the exhaust pipe is connected to the side wall of the connecting sleeve. One side of the quantitative collection pipe is connected to the discharge pipe and the feed pipe through a discharge valve and a feed valve, respectively. The storage and transportation device includes a movable transfer trolley. The trolley platform is supported on the front side by a liftable guide rail platform and on the rear side by a fixed guide groove bracket. The guide rail platform supports a shielded container whose inner cavity is adapted to the sampling bottle and whose top can be covered by a shielded cover. The guide groove bracket supports shielded cover guide grooves that extend forward and backward. The shielded cover and the shielded cover guide grooves form a horizontal moving pair. The lifting device includes a vertical cylinder installed at the lower part of the frame. The telescopic end of the cylinder is fixedly connected to the lifting frame, and the inner side of the lifting frame extends out to form a support arm that supports the guide rail platform.

2. The radioactive material sampling device according to claim 1, characterized in that: The frame is also equipped with a liquid receiving device, which includes a rotating arm that is hinged at one end to a mounting base fixed to the frame, a liquid tray fixed at the other end of the rotating arm, a retractable end of a cylinder near the mounting base, and another end of the cylinder hinged to another part of the frame.

3. The radioactive material sampling device according to claim 2, characterized in that: The front side of the trolley platform on the transfer trolley is supported by a vertical guide rod, and the guide rod and the linear bearing fixed under the trolley platform form a vertical sliding pair.

4. The radioactive material sampling device according to claim 2, characterized in that: The rear side of the shielding cover is hinged to the telescopic end of the electric push rod installed at the rear end of the transfer trolley.

5. The radioactive material sampling device according to claim 4, characterized in that: The lifting frame is equipped with rollers on its upper and lower sides, which are in contact with the uprights of the frame.

6. The radioactive material sampling device according to claim 5, characterized in that: The transfer trolley has an adjuster consisting of horizontal limit bolts located below its front legs.

7. The radioactive material sampling device according to claim 6, characterized in that: One side of the frame forms an opening facing the transfer trolley, and horizontal guide plates are fixed on both sides of the opening. The flared opening formed by the two horizontal guide plates is adapted to the two sides of the guide rail platform.

8. The radioactive material sampling device according to claim 7, characterized in that: The side of the frame furthest from the transfer trolley is equipped with a limit block and a positioning sensor.

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