Slurry recycling test device for radioactive waste liquid tank

Abstract

The utility model belongs to the technical field of nuclear facility decommissioning treatment, and particularly relates to a radioactive waste liquid tank slurry recovery test device which comprises a station rack, a sampling pipe and a lifting mechanism located on the station rack, the station rack is arranged on the side edge of a waste liquid tank, an operation opening parallel to the lifting mechanism is formed in the waste liquid tank, and the sampling pipe is arranged on the operation opening. An opening and closing cover is arranged at the operation opening, a sampling vehicle is additionally arranged, the sampling tube is fixed on the sampling vehicle, the sampling vehicle is connected with a lifting end of a lifting mechanism by virtue of a connecting rope, and the sampling vehicle enters the waste liquid tank along the operation opening by virtue of the lifting mechanism for sampling and returns by virtue of the lifting mechanism. Through the lifting mechanism and the sampling vehicle, workers do not need to sample radioactive slurry in person, the danger that the workers are exposed in the waste liquid tank is avoided, and the life safety of the workers is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuclear facility decommissioning management, and in particular relates to a radioactive waste liquid tank mud retrieval test device. Background Art

[0002] A radioactive liquid waste tank is a container developed for storing nuclear waste. During the storage process of nuclear waste, the tank will inevitably be damaged by chemical corrosion. Therefore, the tank is required to have a certain service life. When the service life of the tank is reached, the nuclear waste in the tank must be transferred.

[0003] When transferring nuclear waste from a waste tank, all materials in the tank must be cleaned out to prevent hazards from possible residual radioactive substances in the tank. However, during long-term storage, due to the natural sedimentation and solubility of compounds, radioactive mud of varying thicknesses will form at the bottom of the tank. Before removing the mud, a small amount of mud needs to be retrieved and tested for its radioactivity in order to formulate a subsequent removal plan.

[0004] Currently, radioactive mud sampling is mostly done manually, with workers wearing protective clothing and holding sampling rods with sampling tubes to take samples at the edge of the waste liquid tank. However, this method may expose workers to the waste liquid tank, and the entire sampling process is prone to safety accidents. Utility Model Content

[0005] In order to solve the problems existing in the above-mentioned prior art, the utility model provides a radioactive waste liquid tank mud retrieval test device. Through the lifting mechanism and the sampling vehicle, there is no need for workers to personally sample the radioactive mud, there is no danger of workers being exposed to the waste liquid tank, and the life safety of the workers is guaranteed.

[0006] The specific technical solution adopted by the utility model is:

[0007] A radioactive waste liquid tank mud retrieval test device comprises a work station platform, a sampling tube and a lifting mechanism located on the work station platform, wherein the work station platform is arranged on the side of the waste liquid tank, an operating port parallel to the lifting mechanism is arranged on the waste liquid tank, an opening and closing cover is arranged at the operating port, and a sampling vehicle is additionally provided, wherein the sampling tube is fixed on the sampling vehicle, the sampling vehicle is connected to the lifting end of the lifting mechanism by means of a connecting rope, and the sampling vehicle enters the waste liquid tank along the operating port by means of the lifting mechanism to take samples and returns by means of the lifting mechanism.

[0008] There are multiple groups of workstation racks arranged around the waste liquid tank, and the heights of the multiple groups of workstation racks are arranged in equidistant order. There are multiple groups of operation ports of the waste liquid tank corresponding to the workstation racks. The sampling vehicle selects an operation port with a corresponding height according to the height of the waste liquid in the waste liquid tank to enter the waste liquid tank for sampling.

[0009] The sampling vehicle includes a vehicle body, a counterweight, a moving wheel and a fixed ring. The counterweight and the fixed ring are respectively located at both ends of the vehicle body. The counterweight is located at the end of the sampling vehicle in the descending direction. The connecting rope is fixedly connected to the vehicle body by means of the fixed ring. The moving wheel is located at the bottom of the vehicle body. A fixed chamber and a slurry inlet connected to the fixed chamber are also provided in the vehicle body. The sampling tube is fixed in the fixed chamber and the opening of the sampling tube faces the slurry inlet. The slurry in the waste liquid tank flows into the sampling tube through the slurry inlet.

[0010] The lifting mechanism includes a winch and a limit device, the winch is fixedly connected to the work station frame, the limit device includes a placement platform and a limit frame, one end of the placement platform is hinged to the work station frame, the other end of the placement platform has the freedom to swing around the hinge point and is tilted downward to the lower edge of the operating port, the limit frame is fixed to the placement platform, and a limit hole is set on the top of the limit frame, one end of the connecting rope is wound and fixed to the winch, and the other end of the connecting rope passes through the limit hole and is fixedly connected to the sampling vehicle, the sampling vehicle is located on the placement platform and uses the limit frame to prevent the sampling vehicle from moving toward the winch.

[0011] The end of the placement platform away from the hinged end is also provided with a lap plate and a telescopic mechanism. The lap plate is fixedly connected to the placement platform by means of the telescopic mechanism. The placement platform is overlapped and fixed with the operating port by means of the lap plate. The lap plate has telescopic freedom by means of the telescopic mechanism.

[0012] The telescopic mechanism is located between the placement platform and the lap plate and has two groups symmetrically arranged on the left and right. The telescopic mechanism includes a telescopic sleeve and a telescopic rod. One end of the telescopic sleeve is fixedly connected to the end of the placement platform, one end of the telescopic rod is fixedly connected to the end of the lap plate, and the other end of the telescopic rod is sleeved with the telescopic sleeve and has the freedom to move along the telescopic sleeve. The telescopic mechanism also includes a limit block and a limit snap ring. The limit block is fixed to the side wall of the telescopic rod, and the limit snap ring is fixed to the inner tube wall of the telescopic sleeve and hinders the movement of the limit block. The limit block uses the limit snap ring to prevent the telescopic rod from detaching from the telescopic sleeve.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adds a sampling vehicle with a sampling tube. When sampling is required, the opening and closing cover is opened, and the sampling vehicle is placed into the waste liquid tank from the operating port by means of a lifting mechanism for sampling. When the sampling vehicle completes sampling, the lifting mechanism re-suspends the sampling vehicle back to the workstation with the help of a connecting rope, and the opening and closing cover is re-closed. Finally, the staff can go to the workstation to recycle the sampling tube. Through the lifting mechanism and the sampling vehicle, the staff does not need to sample the radioactive mud personally, and there is no danger of the staff being exposed to the waste liquid tank, thereby ensuring the life safety of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the sampling vehicle when taking samples;

[0018] Figure 4 This is a schematic diagram of the structure of the sampling vehicle after sampling is completed;

[0019] Figure 5 This is a schematic diagram of the structure of the sampling vehicle;

[0020] Figure 6 It is a schematic diagram of the cooperation between the telescopic sleeve and the telescopic rod;

[0021] In the attached drawings, 1. work station stand, 2. sampling tube, 3. waste liquid tank, 4. operation port, 5. connecting rope, 6. vehicle body, 7. counterweight, 8. moving wheel, 9. fixing ring, 10. winch, 11. placing platform, 12. limiting frame, 13. limiting hole, 14. lap plate, 15. telescopic sleeve, 16. telescopic rod, 17. limiting block, 18. limiting clamp. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] Specific implementation examples Figure 1-6 As shown, the utility model provides a test device for slurry retrieval of a radioactive waste liquid tank 3, comprising a work station frame 1, a sampling tube 2 and a lifting mechanism on the work station frame 1, wherein the work station frame 1 is arranged on the side of the waste liquid tank 3, an operating port 4 parallel to the lifting mechanism is arranged on the waste liquid tank 3, an opening and closing cover is arranged at the operating port 4, and a sampling vehicle is additionally provided, the sampling tube 2 is fixed on the sampling vehicle, the sampling vehicle is connected to the lifting end of the lifting mechanism by means of a connecting rope 5, the sampling vehicle enters the waste liquid tank 3 along the operating port 4 by means of the lifting mechanism to take samples and returns by means of the lifting mechanism.

[0024] At present, radioactive mud sampling is mostly done manually, with workers wearing protective clothing and holding a sampling rod with a sampling tube 2 to take samples at the edge of the waste liquid tank 3. However, this method may expose the workers to the waste liquid tank 3, and the entire sampling process is prone to safety accidents.

[0025] Therefore, the utility model adds a sampling vehicle with a sampling tube 2. When sampling is required, the opening and closing cover is opened, and the sampling vehicle is placed into the waste liquid tank 3 from the operation port 4 by means of a lifting mechanism for sampling. When the sampling vehicle completes sampling, the lifting mechanism re-suspends the sampling vehicle back to the workstation stand 1 with the help of a connecting rope 5, and the opening and closing cover is re-closed. Finally, the staff can go to the workstation to recycle the sampling tube 2. Through the lifting mechanism and the sampling vehicle, the staff does not need to sample the radioactive mud personally, and there is no danger of the staff being exposed to the waste liquid tank 3, thereby ensuring the life safety of the staff.

[0026] like Figure 1-2 As shown, the workstation racks 1 are provided with multiple groups around the waste liquid tank 3, and the heights of the multiple groups of workstation racks 1 are arranged in an equidistant manner. The operation ports 4 of the waste liquid tank 3 are provided with multiple groups corresponding to the workstation racks 1. The sampling vehicle selects the operation port 4 of the corresponding height according to the height of the waste liquid in the waste liquid tank 3 to enter the waste liquid tank 3 for sampling. Since the thickness of the radioactive mud formed in different waste liquid tanks 3 is different, the operation ports 4 with different heights are selected. The operation port 4 higher than the thickness of the radioactive mud is selected according to the actual situation to prevent the radioactive substances in the waste liquid tank 3 from flowing out along the operation port 4.

[0027] like Figure 1 and Figure 5 As shown, the sampling vehicle includes a vehicle body 6, a counterweight 7, a moving wheel 8 and a fixing ring 9. The counterweight 7 and the fixing ring 9 are respectively located at both ends of the vehicle body 6. The counterweight 7 is located at the end of the sampling vehicle in the descending direction. The connecting rope 5 is fixedly connected to the vehicle body 6 by means of the fixing ring 9. The moving wheel 8 is located at the bottom of the vehicle body 6. A fixed chamber and a slurry inlet connected to the fixed chamber are also provided in the vehicle body 6. The sampling tube 2 is fixed in the fixed chamber and the opening of the sampling tube 2 faces the slurry inlet. The waste liquid tank The mud in the 3 flows into the sampling tube 2 through the slurry inlet, and the counterweight 7 can ensure that the slurry inlet of the vehicle body 6 falls into the mud, so that the mud can smoothly enter the sampling tube 2. A fixed cover is provided at the opening between the fixed chamber and the vehicle body 6, and a card slot matching the sampling tube 2 is provided inside the fixed chamber. Before sampling, the sampling tube 2 is first fixed in the fixed chamber by means of the card slot, and then the fixed cover is fixed by bolts and the opening of the fixed chamber is sealed to prevent the residual radioactive mud in the fixed chamber from falling to the outside of the waste liquid tank 3. In addition, the sampling tube 2 is arranged at an angle, with the bottom of the sampling tube 2 facing downward and the opening of the sampling tube 2 facing upward, which can prevent the loss of mud in the sampling tube 2 during the return journey.

[0028] like Figure 3-4 As shown, the lifting mechanism includes a winch 10 and a limiting device, the winch 10 is fixedly connected to the workstation frame 1, the limiting device includes a placement platform 11 and a limiting frame 12, one end of the placement platform 11 is hinged to the workstation frame 1, the other end of the placement platform 11 has the freedom to swing around the hinge point and is tilted downward to the lower edge of the operating port 4, the limiting frame 12 is fixed on the placement platform 11, and a limiting hole 13 is set on the top of the limiting frame 12, one end of the connecting rope 5 is wound and fixed with the winch 10, and the other end of the connecting rope 5 passes through the limiting hole 13 and is fixedly connected to the sampling vehicle, and the sampling vehicle is located on the placement platform 11 and with the help of The limit frame 12 prevents the sampling vehicle from moving toward the winch 10. When the placement platform 11 is tilted downward and placed at the lower edge of the operating port 4, the sampling vehicle will move along the slope toward the operating port 4 under the action of gravity, and gradually descend with the help of the lifting mechanism until it sinks into the radioactive mud. When the sampling vehicle completes sampling and returns to the placement platform 11, the placement platform 11 is tilted upward under the action of the gravity of the sampling vehicle. At this time, the placement platform 11 and the limit frame 12 clamp and fix the sampling vehicle. At the same time, in order to prevent the connecting rope 5 from winding back too much and causing the sampling vehicle to be damaged by the roller of the winch, a limit hole 13 is provided to prevent the sampling vehicle from crossing the limit hole 13 and touching the winch.

[0029] like Figure 3-4 and Figure 6 As shown, a lap plate 14 and a telescopic mechanism are further provided at the end of the placement platform 11 away from the hinged end. The lap plate 14 is fixedly connected to the placement platform 11 by means of the telescopic mechanism. The placement platform 11 is overlapped and fixed with the operating port 4 by means of the lap plate 14. The lap plate 14 has the freedom of extension and contraction by means of the telescopic mechanism. When sampling, the lap plate 14 needs to be tilted downward to overlap the operating port 4. At this time, the distance between the lap plate 14 and the placement platform 11 is long. However, after the sampling is completed, the lap plate 14 needs to be away from the operating port 4. At this time, the distance between the lap plate 14 and the placement platform 11 is short to ensure that the opening and closing cover can be closed smoothly. Therefore, a telescopic mechanism is provided to realize the extension and contraction of the lap plate 14.

[0030] like Figure 3-4 and Figure 6As shown, the telescopic mechanism is located between the placement platform 11 and the lap plate 14 and has two groups symmetrically arranged on the left and right. The telescopic mechanism includes a telescopic sleeve 15 and a telescopic rod 16. One end of the telescopic sleeve 15 is fixedly connected to the end of the placement platform 11, and one end of the telescopic rod 16 is fixedly connected to the end of the lap plate 14. The other end of the telescopic rod 16 is sleeved with the telescopic sleeve 15 and has the freedom to move along the telescopic sleeve 15. The telescopic mechanism also includes a limit block 17 and a limit snap ring 18. The limit block 17 is fixed to the side wall of the telescopic rod 16, and the limit snap ring 18 is fixed to the inner tube wall of the telescopic sleeve 15 and hinders the movement of the limit block 17. The limit block 17 uses the limit snap ring 18 to prevent the telescopic rod 16 from detaching from the telescopic sleeve 15. The telescopic mechanism in the utility model adopts the form of a telescopic rod 16 and a telescopic sleeve 15, and the telescopic movement of the lap plate 14 is realized by means of the gravity and swing of the lap plate 14. When sampling is performed, the placement platform 11 and the plane where the lap plate 14 is located are tilted downward, and the telescopic rod 16 moves toward the lap plate 14 and stretches under the action of the gravity of the lap plate 14. When sampling is completed, the placement platform 11 and the plane where the lap plate 14 is located are tilted upward. At this time, the telescopic rod 16 moves toward the placement platform 11 and shortens under the action of the gravity of the lap plate 14.

[0031] In addition, a comb tooth structure is provided at the gap between the placement platform 11 and the overlapping plate 14 , and the comb tooth structure is arranged parallel to the upper surfaces of the placement platform 11 and the overlapping plate 14 to ensure that the sampling vehicle moves smoothly from the placement platform 11 to the overlapping plate 14 .

Claims

1. A radioactive waste liquid tank mud retrieval test device, comprising a workstation stand (1), a sampling tube (2) and a lifting mechanism located on the workstation stand (1), wherein the workstation stand (1) is arranged on the side of a waste liquid tank (3), an operating port (4) parallel to the lifting mechanism is arranged on the waste liquid tank (3), and an opening and closing cover is arranged at the operating port (4), characterized in that: A sampling vehicle is also provided. The sampling tube (2) is fixed on the sampling vehicle. The sampling vehicle is connected to the lifting end of the lifting mechanism by means of a connecting rope (5). The sampling vehicle enters the waste liquid tank (3) along the operating port (4) by means of the lifting mechanism to take samples and returns by means of the lifting mechanism.

2. A radioactive waste liquid tank mud retrieval test device according to claim 1, characterized in that: The workstation racks (1) are provided in a plurality of groups around the waste liquid tank (3), the heights of the plurality of workstation racks (1) being arranged in an equidistant manner, the operation ports (4) of the waste liquid tank (3) being provided in a plurality of groups corresponding to the workstation racks (1), and the sampling vehicle selects an operation port (4) of a corresponding height according to the height of the waste liquid in the waste liquid tank (3) to enter the waste liquid tank (3) for sampling.

3. A radioactive waste liquid tank mud retrieval test device according to claim 1, characterized in that: The sampling vehicle comprises a vehicle body (6), a counterweight (7), a moving wheel (8) and a fixing ring (9); the counterweight (7) and the fixing ring (9) are respectively located at two ends of the vehicle body (6); the counterweight (7) is located at the end of the sampling vehicle in the descending direction; the connecting rope (5) is fixedly connected to the vehicle body (6) by means of the fixing ring (9); the moving wheel (8) is located at the bottom of the vehicle body (6); a fixed chamber and a slurry inlet connected to the fixed chamber are also provided in the vehicle body (6); the sampling tube (2) is fixed in the fixed chamber and the opening of the sampling tube (2) faces the slurry inlet; the slurry in the waste liquid tank (3) flows into the sampling tube (2) by means of the slurry inlet.

4. A radioactive waste liquid tank mud retrieval test device according to claim 1, characterized in that: The lifting mechanism comprises a winch (10) and a limiting device, wherein the winch (10) is fixedly connected to the workstation frame (1), and the limiting device comprises a placement platform (11) and a limiting frame (12). One end of the placement platform (11) is hinged to the workstation frame (1), and the other end of the placement platform (11) has the freedom to swing around the hinge point and is tilted downward to the lower edge of the operating port (4). The limiting frame (12) is fixed to the placement platform (11), and a limiting hole (13) is arranged on the top of the limiting frame (12). One end of the connecting rope (5) is wound and fixed to the winch (10), and the other end of the connecting rope (5) passes through the limiting hole (13) and is fixedly connected to the sampling vehicle. The sampling vehicle is located on the placement platform (11) and is prevented from moving toward the winch (10) by means of the limiting frame (12).

5. A radioactive waste tank mud retrieval test device according to claim 4, characterized in that: The end of the placement platform (11) away from the hinged end is also provided with a lap plate (14) and a telescopic mechanism, the lap plate (14) is fixedly connected to the placement platform (11) by means of the telescopic mechanism, the placement platform (11) is overlapped and fixed with the operating port (4) by means of the lap plate (14), and the lap plate (14) has telescopic freedom by means of the telescopic mechanism.

6. A radioactive waste tank mud retrieval test device according to claim 5, characterized in that: The telescopic mechanism is located between the placement platform (11) and the lap plate (14) and has two groups symmetrically arranged on the left and right. The telescopic mechanism comprises a telescopic sleeve (15) and a telescopic rod (16). One end of the telescopic sleeve (15) is fixedly connected to the end of the placement platform (11). One end of the telescopic rod (16) is fixedly connected to the end of the lap plate (14). The other end of the telescopic rod (16) is sleeved with the telescopic sleeve (15) and has the freedom to move along the telescopic sleeve (15). The telescopic mechanism also comprises a limit block (17) and a limit snap ring (18). The limit block (17) is fixed to the side wall of the telescopic rod (16). The limit snap ring (18) is fixed to the inner tube wall of the telescopic sleeve (15) and hinders the movement of the limit block (17). The limit block (17) prevents the telescopic rod (16) from detaching from the telescopic sleeve (15) by means of the limit snap ring (18).

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