Device for detecting radioactive elements and method for maintaining it

Abstract

The application provides a radioactive element detection device and a maintenance method thereof, the radioactive element detection device comprising a torch pipe and a coil, the coil being fixed on a support; a carrier being used for carrying the torch pipe and a base, the torch pipe being arranged on the base; a vertical guide rail being arranged on the support, a moving part being arranged on the vertical guide rail, a bottom of the carrier being arranged on the moving part; a first limiting unit being arranged on the moving part and being used for limiting the front and back movement of the bottom, a second limiting unit being arranged on the moving part and being used for limiting the left and right movement of the bottom; a third limiting unit being arranged on the support and being used for limiting the vertical movement of the moving part; a pushing unit applying an upward pushing force to the moving part; a mechanical hand being used for moving the third limiting unit so that the moving part is fixed at different heights, and moving the second limiting unit so that the bottom is moved leftward and rightward or fixed. The application has the advantages of automation, safety and the like.

Description

Technical Field

[0001] This invention relates to element detection, and particularly to a device for detecting radioactive elements and a method for maintaining it. Background Technology

[0002] In the spent fuel reprocessing stage of the nuclear industry, ICP-OES is required to analyze non-volatile elements in high-level radioactive waste liquid. However, the samples themselves have strong gamma radioactivity, with a radioactive source activity concentration reaching 10. 13 The radiation level is Bq / L, therefore a shielded room is needed for radiation protection. This requires automated equipment for detection and maintenance, but currently there is no detection equipment that meets this requirement. Summary of the Invention

[0003] To address the shortcomings of the existing technical solutions, the present invention provides a device for detecting radioactive elements.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A radioactive element detection device, comprising a detection unit and a support, wherein the detection unit includes a torch and a coil, and the coil is fixed to the support; the radioactive element detection device further includes:

[0006] A support member for supporting the torch tube and the base, wherein the torch tube is disposed on the base;

[0007] A movable component and a vertical guide rail, wherein the vertical guide rail is mounted on the bracket, the movable component is mounted on the vertical guide rail, and the bottom of the bearing component is mounted on the movable component;

[0008] A first limiting unit and a second limiting unit are provided on the moving member to limit the forward and backward movement of the bottom; the first limiting unit is provided on the moving member to limit the left and right movement of the bottom.

[0009] The third limiting unit is disposed on the bracket and is used to limit the vertical movement of the moving part;

[0010] A pushing unit that applies an upward thrust to the moving member;

[0011] The robotic arm is used to move the third limiting unit so that the movable part is fixed at different heights, and to move the second limiting unit so that the bottom can be moved left or right or fixed.

[0012] Another object of the present invention is to provide a maintenance method for the radioactive element detection device of the present invention, which is achieved through the following technical solution:

[0013] The maintenance method for the radioactive element detection device of the present invention includes the following steps:

[0014] (A1) The robot moves forward to the third limiting unit, and the moving part disengages from the limiting of the third limiting unit;

[0015] (A2) The robotic arm pushes the moving part downwards;

[0016] (A3) The robotic arm moves the third limiting unit in the opposite direction. The third limiting unit is located above the moving part, preventing the moving part from moving upward.

[0017] (A4) The robotic arm moves the second limiting unit, thereby releasing the limiting position on the bottom right side of the carrier;

[0018] (A5) The robotic arm moves the carrier, causing the carrier to disengage from the first limiting unit.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] To adapt to the detection of radioactive elements and prevent radiation damage to operators, an automated remote operation scheme was proposed, which has achieved the following technical advantages;

[0021] 1. High assembly precision;

[0022] The robotic arm is used to grasp and separate the carrier, and the first, second and third limiting units are used to achieve three-dimensional precise control of the carrier, ensuring that the coaxial accuracy of the RF coil and the torch tube is within 0.2mm.

[0023] 2. Automation;

[0024] The replacement of the torch tube is automated by using a robotic arm to perform translation, rotation and other actions.

[0025] 3. Safety;

[0026] No personnel are required to enter the nuclear radiation environment for maintenance, thus improving safety. Attached Figure Description

[0027] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are merely illustrative of the technical solutions of this invention and are not intended to limit the scope of protection of this invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a radioactive element detection device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the second limiting unit according to an embodiment of the present invention. Detailed Implementation

[0030] Figure 1-2 The following description illustrates optional embodiments of the invention to teach those skilled in the art how to implement and reproduce the invention. Some conventional aspects have been simplified or omitted to explain the technical solutions of the invention. Those skilled in the art should understand that variations or substitutions derived from these embodiments will be within the scope of the invention. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the invention. Therefore, the invention is not limited to the following optional embodiments, but is defined only by the claims and their equivalents.

[0031] Example 1:

[0032] Figure 1 A schematic diagram of the structure of a radioactive element detection device according to an embodiment of the present invention is provided, as follows: Figure 1 As shown, the radioactive element detection device includes:

[0033] The detection unit includes a torch tube 22 and a coil 21, and the coil 21 is fixed on the bracket 11.

[0034] The support member 24 is used to support the torch tube 22 and the base 23, and the torch tube 22 is disposed on the base 23;

[0035] The movable component 41 and the vertical guide rail 42 are mounted on the bracket 11, the movable component 41 is mounted on the vertical guide rail 42, and the bottom 241 of the bearing component 24 is mounted on the movable component 41.

[0036] A first limiting unit 30 and a second limiting unit are provided. The first limiting unit 30 is disposed on the moving member 41 to limit the forward and backward movement of the bottom 241. The second limiting unit is disposed on the moving member 41 to limit the left and right movement of the bottom 241.

[0037] The third limiting unit is disposed on the bracket 11 and is used to limit the vertical movement of the movable 41 pieces;

[0038] A pushing unit 51 applies an upward thrust to the moving member 41;

[0039] The robotic arm is used to move the third limiting unit 35 so that the moving part 41 is fixed at different heights, and to move the second limiting unit 31 so that the bottom 241 is moved left or right or fixed.

[0040] To further restrict the forward and backward movement of the movable member, the first limiting unit 30 includes a first limiting member and a second limiting member fixed in the forward and backward direction on the upper side of the movable member 41 and parallel to each other, and the bottom 241 is stuck in the groove formed between the first limiting member, the second limiting member and the movable member 41.

[0041] To further limit the left and right translation of the moving part, the second limiting unit includes a third limiting member 33 and a fourth limiting member 31. The third limiting member 33 is used to block the leftward movement of the bottom 241, such as... Figure 2 As shown, the fourth limiting member 31 includes:

[0042] A first rotating arm 312 and a first rotating shaft 314, wherein the first rotating arm 312 rotates around the first rotating shaft 314, and the first rotating shaft 314 is disposed on the bottom 241;

[0043] The first clamping member 311 is fixed to one end of the first rotating arm 312, allowing the robotic arm to clamp;

[0044] A first guide member 315 and a fixing member 313 are provided. The first guide member 315 is fixed on the bottom 241. One end of the fixing member 313 is movably connected to the other end of the first rotating arm 312, and the other end passes through the first guide member 315 and the bottom 241 and is inserted into the hole on the upper side of the moving member 41.

[0045] To drive the fixed component to move vertically, the connection between the fixed component and the rotating arm is further configured as follows:

[0046] The first rotating arm 312 has a waist-shaped hole 316, and one end of the fixing member 313 passes through the waist-shaped hole 316 and slides within the waist-shaped hole 316.

[0047] To restrict the vertical movement of the moving part by rotation, the third limiting unit further includes a fifth limiting member 35 and a sixth limiting member 32, wherein the fifth limiting member 35 and the sixth limiting member 32 each include:

[0048] The second rotating shaft is fixed on the bracket 11, and the second rotating arm rotates around the second rotating shaft.

[0049] The second clamping member is fixed to the second rotating arm and allows the robotic arm to clamp;

[0050] The limiting part is disposed on the second rotating arm and has a limiting groove. When the second rotating arm rotates, the moving member 41 is clamped in the limiting groove or blocked by the lower side of the limiting part.

[0051] To provide an upward thrust to the moving part 41 and the components it carries, the pushing unit 51 further includes:

[0052] Support plate 52, which is horizontally fixed on the bracket 11 and located below the movable member 41; support plate 52 has a through guide hole;

[0053] The second guide member 53 passes through the guide hole and is fixed at one end to the movable member 41;

[0054] The first pulley 511 and the second pulley 512 are respectively fixed to the lower side of the support plate 52 and are located on both sides of the second guide member 53.

[0055] The first counterweight 513 and the second counterweight 514 are connected together. One end of the first connecting rope is connected to the second guide member 53, and the other end passes around the first pulley 511 and is connected to the first counterweight 513. One end of the second connecting rope is connected to the second guide member 53, and the other end passes around the second pulley 512 and is connected to the second counterweight 514.

[0056] To facilitate the vertical movement of the moving part and the components it carries, the mass of the counterweight in the pushing unit 51 is further equal to the mass of the moving part 41 and the components it carries.

[0057] The maintenance method for a radioactive element detection device according to an embodiment of the present invention includes the following steps:

[0058] (A1) The robot moves forward to the third limiting unit, and the moving part 41 disengages from the limiting of the third limiting unit;

[0059] (A2) The robotic arm pushes the moving part 41 downward;

[0060] (A3) The robotic arm moves the third limiting unit in the opposite direction. The third limiting unit is located on the upper side of the moving part 41, preventing the moving part 41 from moving upward.

[0061] (A4) The robotic arm moves the second limiting unit, thereby releasing the limiting position on the bottom right side of the support member 24;

[0062] (A5) The robotic arm moves the carrier 24, causing the carrier 24 to disengage from the first limiting unit 30.

[0063] In order to limit the moving parts to different heights, further, in step (A1), the robot arm moves the third limiting unit in the following way:

[0064] The robotic arm rotates the third limiting unit in the forward direction, and the end of the moving part 41 disengages from the limiting groove;

[0065] In step (A3), the robot arm rotates the third limiting unit in the opposite direction, and the end of the moving part 41 is blocked by the third limiting unit.

[0066] To control the translation of the bottom, further, in step (A4), the robotic arm moves the second limiting unit in the following manner:

[0067] The robotic arm presses down on one end of the first rotating arm 312, and the other end of the first rotating arm 312 drives the fixing member 313 to move upward within the first guide member 315, so that the lower end of the fixing member 313 disengages from the hole on the moving member 41.

[0068] Example 2:

[0069] An application example of the radioactive element detection device and its maintenance method according to Embodiment 1 of the present invention.

[0070] In this application example, such as Figure 1 As shown, the torch tube 22 is mounted on the base 23, and the support member 24 supports the torch tube 22 and the base 23; the first vertical guide rail 42 and the second vertical guide rail 43 are respectively mounted on the bracket 11, the moving member 41 is mounted on the two vertical guide rails, and the bottom 241 of the support member 24 is mounted on the moving member 41.

[0071] In the first limiting unit 30, the first limiting member and the second limiting member are fixed in the front-back direction on the upper side of the moving member 41 and are parallel to each other. The bottom 241 is stuck in the groove formed between the first limiting member, the second limiting member and the moving member 41, so that the bottom 241 can only move left and right, and has no front-back or vertical movement.

[0072] The first guide portion and the second guide portion are disposed on the upper side of the moving member. From right to left, the distance between the two guide portions decreases, and the minimum distance is equal to the distance between the first limiting member and the second limiting member.

[0073] like Figure 2As shown, in the second limiting unit, the third limiting member 33 adopts a first stop, which is fixed on the moving member 41 to prevent further leftward movement of the bottom 241; in the fourth limiting member 31, the bent first rotating arm 312 rotates around the first rotating shaft 314, which is disposed on the bottom 241; the first clamping member 311 is fixed to one end of the first rotating arm 312, allowing the robot to clamp; the first guide member 315 is fixed on the bottom 241, and one end of the fixing member 313 is movably connected to the other end of the first rotating arm 312, while the other end passes through the first guide member 315 and the bottom 241 and is inserted into the hole on the upper side of the moving member 41; the first rotating arm 312 has an oblong hole 316, and one end of the fixing member 313 passes through the oblong hole 316 and slides within the oblong hole 316;

[0074] In the third limiting unit, the fifth limiting member 35 and the sixth limiting member 32 respectively include: a second rotating shaft fixed on the bracket 11, and a second rotating arm rotating around the second rotating shaft; a second clamping member fixed on the second rotating arm and allowing the robot to clamp; a limiting part disposed on the second rotating arm and having a limiting groove, such that when the second rotating arm rotates, the left and right ends of the moving member 41 are respectively clamped in the limiting groove or blocked by the lower side of the limiting part; the fifth limiting member limits the position of the right end of the moving member, and the sixth limiting member limits the position of the left end of the moving member; a second stop 36 disposed on the bracket 11 to prevent the moving member 41 from moving further downward; and a third stop disposed on the bracket 11 to prevent the moving member 41 from moving further upward.

[0075] In the pushing unit 51, the support plate 52 is horizontally fixed on the bracket 11 and located below the moving member 41; the support plate 52 has two parallel guide holes that penetrate the support plate 52: a first guide hole and a second guide hole; a second guide member 53 passes through the first guide hole and is fixed at one end to the moving member 41, and a third guide member 54 passes through the second guide hole and is fixed at one end to the moving member 41; a first pulley 511 and a second pulley 512 are respectively fixed below the support plate 52 and are located on both sides of the second guide member 53; one end of the first connecting rope is connected to the second guide member 53, and the other end passes around the first pulley 511 and is connected to the first counterweight 513; one end of the second connecting rope is connected to... The second guide 53 is connected to the second guide 54, and the other end passes around the second pulley 512 and is connected to the second counterweight 514; the third pulley 515 and the fourth pulley 516 are respectively fixed to the lower side of the support plate 52 and are located on both sides of the third guide 54; one end of the third connecting rope is connected to the third guide 54, and the other end passes around the third pulley 515 and is connected to the third counterweight 517; one end of the fourth connecting rope is connected to the third guide 54, and the other end passes around the fourth pulley 518 and is connected to the fourth counterweight 518; the sum of the masses of the four counterweights is equal to the sum of the masses of the moving part 41 and the components it carries (including the bearing part 24, torch tube 22, first rotating arm 312, fixing part 313, etc.);

[0076] The robotic arm is used to grasp the first clamping member 311 and rotate it in the forward direction, thereby releasing the position limit and translating it to the left, then limiting the position of the carrier member 24, and grasping the second clamping member, thereby rotating the third limiting unit so that the two ends of the moving member 41 are limited to different heights.

[0077] The maintenance method for a radioactive element detection device according to an embodiment of the present invention includes the following steps:

[0078] (A1) The robotic arm grasps the second clamping member and rotates the rotating arm of the fifth limiting member 35 counterclockwise, so that the right end of the moving member 41 disengages from the limiting groove of the fifth limiting member 35.

[0079] The robotic arm rotates the rotating arm of the sixth limiting member 32 clockwise, causing the left end of the moving member 41 to disengage from the limiting groove of the sixth limiting member 32, so that the moving member 41 can move vertically downward.

[0080] (A2) The robot pushes the moving part 41 downward. Since the mass of the counterweight is equal to the mass of the moving part 41 and the components it carries (including the second guide 53 and the third guide 54), the robot can use only a small force to make the moving part 41 move vertically downward along the first vertical guide rail 42 and the second vertical guide rail 43.

[0081] The torch tube 22 moves downward within the coil 21 and moves to the lower side of the coil 21;

[0082] (A3) The vertically downward moving part 41 is blocked by the second stop 36. The robot grabs the second clamping part and rotates the rotating arm of the fifth limiting part 35 clockwise, so that the right end of the moving part 41 is blocked by the lower side of the limiting part.

[0083] The robotic arm rotates the rotating arm of the sixth limiting member 32 counterclockwise, so that the left end of the moving member 41 is blocked by the lower side of the limiting part. The left and right ends of the moving member 41 are respectively limited between the limiting part and the second stop 36, thus preventing it from moving vertically.

[0084] (A4) The robotic arm grasps the first clamping member 311 and rotates the first rotating arm 312 clockwise, thereby driving the fixed member 313 to move vertically upward in the first guide member 315 and disengage from the blind hole on the moving member 41, so that the limit on the right side of the bottom 241 of the bearing member 24 is released.

[0085] (A5) The robotic arm drags the carrier 24 to the right, causing the carrier 24 to disengage from the first limiting unit 30 and move between the first guide and the second guide;

[0086] (A6) The robotic arm grasps the first clamp 311 on the new carrier 24 (including the new torch tube) and places it on the moving part 41, between the first guide and the second guide.

[0087] The new support component 24 and the replaced support component 24 have the same structure;

[0088] (A7) The robot drags the new carrier 24 to the left. The new carrier 24 moves to the left between the first guide and the second guide, so that the bottom 241 of the new carrier 24 is stuck between the first limit member and the second limit member, and is finally blocked by the first stop 33.

[0089] (A8) The robotic arm grasps the first clamping member 311 of the new carrier 24 and rotates the first rotating arm 312 counterclockwise, thereby driving the fixed member 313 to move vertically downward in the first guide member 315 and enter the blind hole on the moving member 41, so that the bottom 241 of the carrier 24 is limited on the left and right sides.

[0090] (A9) The robotic arm grasps the second clamping member and rotates the rotating arm of the fifth limiting member 35 counterclockwise, so that the right end of the moving member 41 is disengaged from the obstruction of the fifth limiting member 35.

[0091] The robotic arm rotates the rotating arm of the sixth limiting member 32 clockwise, causing the left end of the moving member 41 to disengage from the obstruction of the sixth limiting member 32, allowing the moving member 41 to move vertically upward.

[0092] (A10) The robot pushes the moving part 41 upward. Since the mass of the counterweight is equal to the mass of the moving part 41 and the components it carries (including the second guide 53 and the third guide 54), the robot can use only a small force to make the moving part 41 move vertically upward along the first vertical guide rail 42 and the second vertical guide rail 43.

[0093] The torch tube 22 enters the coil 21 from bottom to top;

[0094] (A11) The vertically upward moving part 41 is blocked by the third stop, the robot grabs the second clamping part, and rotates the rotating arm of the fifth limiting part 35 clockwise, so that the right end of the moving part 41 is stuck in the limiting groove.

[0095] The robotic arm rotates the rotating arm of the sixth limiting member 32 counterclockwise, causing the left end of the moving member 41 to be stuck in the limiting groove, so that the moving member 41 cannot move vertically, that is, the position of the torch tube 22 remains stable.

Claims

1. A device for detecting radioactive elements, comprising a detection unit and a support, the detection unit comprising a torch tube and a coil, the coil being fixed to the support; characterized in that, The detection device of the radioactive element further comprises: a carrier for carrying the torch pipe and the base, the torch pipe being arranged on the base; a moving part and a vertical guide rail, the vertical guide rail being arranged on the support, the moving part being arranged on the vertical guide rail and being movable along the extension direction of the vertical guide rail; the bottom of the carrier is arranged on the moving part; a first limiting unit and a second limiting unit, the first limiting unit being arranged on the moving part and being used for limiting the front and back movement of the bottom, the second limiting unit being arranged on the moving part and being used for limiting the left and right movement of the bottom; the first limiting unit comprises first and second limiting parts which are fixed on the upper side of the moving part in the front and back direction and are parallel to each other, and the bottom is clamped in the groove formed among the first and second limiting parts and the moving part; the second limiting unit comprises third and fourth limiting parts, the third limiting part being a first stop block and being used for blocking the left movement of the bottom, the fourth limiting part comprises a first rotating arm and a first rotating shaft, the first rotating arm rotating around the first rotating shaft, the first rotating shaft being arranged on the bottom, a first clamping part being fixed on one end of the first rotating arm and allowing the mechanical hand to clamp, a first guide part being fixed on the bottom, and a fixed part being movably connected to the other end of the first rotating arm, the other end penetrating through the first guide part and the bottom and being inserted into the hole on the upper side of the moving part; the fixed part and the first rotating arm are connected in the following manner: the first rotating arm has a waist-shaped hole, and one end of the fixed part penetrates through the waist-shaped hole and slides in the waist-shaped hole; a third limiting unit, the third limiting unit being arranged on the support and being used for limiting the vertical movement of the moving part; the third limiting unit comprises fifth and sixth limiting parts, the fifth and sixth limiting parts each comprising a second rotating shaft and a second rotating arm, the second rotating shaft being fixed on the support and the second rotating arm rotating around the second rotating shaft, a second clamping part being fixed on the second rotating arm and allowing the mechanical hand to clamp, and a limiting part being arranged on the second rotating arm and having a limiting groove, when the second rotating arm rotates, the moving part is clamped in the limiting groove or is blocked by the lower side of the limiting part; a second stop block (36) and a third stop block, the second and third stop blocks being mounted on the support (11) and being arranged in the vertical direction, the third stop block being above the second stop block, and the moving part being between the second and third stop blocks, a pushing unit, the pushing unit applying an upward pushing force to the moving part, the pushing unit comprising: a support plate being horizontally fixed on the support and being below the moving part, the support plate having a guide hole penetrating through. A second guide member is arranged to pass through the guide hole and is fixed at one end to the moving member; A first pulley and a second pulley are respectively fixed to the lower side of the support plate and are arranged at both sides of the second guide member; A first counterweight and a second counterweight are arranged, one end of a first connecting rope is connected to the second guide member, the other end of the first connecting rope passes through the first pulley and is connected to the first counterweight, one end of a second connecting rope is connected to the second guide member, the other end of the second connecting rope passes through the second pulley and is connected to the second counterweight; A mechanical hand is arranged to move the third limiting unit so that the moving member is fixed at different heights, and to move the second limiting unit so that the bottom part is moved leftward or rightward or fixed; The mechanical hand is further arranged to move the moving member in the vertical direction, when the moving member moves upward to abut against a third stopper, the torch pipe enters the coil, and the torch pipe and the coil can perform detection of radioactive elements, when the moving member moves downward to abut against a second stopper, the mechanical hand is further arranged to replace the torch pipe.

2. The device for detecting a radioactive element according to claim 1, characterized in that, The mass of the counterweight in the pushing unit is equal to the mass of the moving member and the components carried thereby.

3. The maintenance method of the radioactive element detection device according to any one of claims 1-2, comprising the following steps: (A1) the mechanical hand moves the third limiting unit in the forward direction, and the moving member is disengaged from the limiting of the third limiting unit; (A2) the mechanical hand pushes the moving member downward; (A3) the mechanical hand moves the third limiting unit in the reverse direction, and the third limiting unit is arranged at the upper side of the moving member to prevent upward movement of the moving member; (A4) the mechanical hand moves the second limiting unit so that the limiting of the right side of the bottom part of the carrying member is released; (A5) the mechanical hand moves the carrying member so that the carrying member is disengaged from the first limiting unit.

4. The method of maintaining a device for detecting a radioactive element according to claim 3, characterized in that, In step (A1), the mechanical hand moves the third limiting unit in the following manner: The mechanical hand rotates the third limiting unit in the forward direction, and the end of the moving member is disengaged from the groove; In step (A3), the mechanical hand rotates the third limiting unit in the reverse direction, and the end of the moving member is blocked by the third limiting unit.

5. The method of maintaining the device for detecting a radioactive element according to claim 3, characterized by, In step (A4), the mechanical hand moves the second limiting unit in the following manner: The mechanical hand presses one end of the rotating arm downward, and the other end of the rotating arm drives the fixed member to move upward in the guide member, so that the lower end of the fixed member is disengaged from the hole on the moving member.

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