Fission fragment collection and activity separation device and collection and separation method

Abstract

The invention discloses a fission fragment collection and activity separation device and a collection and separation method, and relates to the technical field of radioactive isotope detection. The linear driving device is mounted at the upper end of the supporting bottom plate; the drawstring winding device is installed on the linear driving device, the drawstring winding device is connected with a drawstring body, and the linear driving device can drive the drawstring winding device and the drawstring body to move towards the detection device; the vacuum isolation chamber is provided with a first connector, a second connector, a third connector and a fourth connector, the second connector is connected with an inflation device, the third connector is connected with a vacuum device, and when the interior of the vacuum isolation chamber is in a negative pressure state, the fourth connector is used for adsorbing the drawstring body; and one end of the vacuum chamber is connected with the first interface, and the other end of the vacuum chamber is connected with the ion accelerator. The radioactive isotope activity separation device can be used for activity separation of radioactive isotopes, and is simple in structure and low in manufacturing cost.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive isotope detection, and in particular to a fission fragment collection and activity separation device and a collection and separation method. Background Art

[0002] When studying short-lived radioisotopes, a belt transport system is required to reduce the background accumulated by medium- and long-lived progeny nuclides. This system collects the short-lived radioisotopes of interest on a belt, periodically moves the collection point of the belt to the measurement area, and measures the short-lived nuclides using a detector.

[0003] Because pull-belt transfer systems are typically used in conjunction with ion accelerators, they cannot disrupt the accelerator's vacuum during isotope collection. Consequently, most pull-belt transfer systems operate entirely in a vacuum, requiring a large vacuum environment (such as a vacuum chamber), significantly increasing manufacturing costs. Furthermore, as radioactive isotopes are periodically collected and detected at a single collection point, the accumulation of intermediate- and long-lived daughter nuclides continues, compromising experimental accuracy over time.

[0004] Therefore, there is an urgent need in the art for a new type of fission fragment collection and activity separation device and collection and separation method to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a fission fragment collection and activity separation device and a collection and separation method to solve the problems existing in the above-mentioned prior art, improve experimental accuracy, and reduce manufacturing costs.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention discloses a fission fragment collection and activity separation device, comprising:

[0008] Support base plate;

[0009] A linear drive device, the linear drive device being mounted on the upper end of the supporting base plate;

[0010] A belt reeling device, the belt reeling device is mounted on the linear drive device, the belt reeling device is connected to the belt body, the linear drive device can drive the belt reeling device and the belt body to move toward the detection device, and the belt reeling device is used to drive the belt body to move;

[0011] A vacuum isolation chamber, wherein the vacuum isolation chamber is provided with a first interface, a second interface, a third interface, and a fourth interface, wherein the second interface is connected to an inflation device, the third interface is connected to a vacuum device, and when the vacuum isolation chamber is in a negative pressure state, the fourth interface is used to adsorb the drawstring body; and

[0012] A vacuum chamber, one end of which is connected to the first interface, and the other end of which is connected to the ion accelerator.

[0013] Preferably, the linear drive device includes a linear motion drive motor, the linear motion drive motor is installed on the upper surface of the support base plate, a linear motion driving wheel is installed on the output shaft of the linear motion drive motor, the linear motion driving wheel is connected to the linear motion driven wheel through a linear motion transmission belt, and the belt winding device is installed on the linear motion transmission belt.

[0014] Preferably, a linear moving frame is fixed on the linear moving transmission belt, and the belt winding device is installed on the upper end of the linear moving frame.

[0015] Preferably, the linear moving frame is a rectangular frame structure, and the lower surface of the lower side of the linear moving frame is connected to the linear moving transmission belt through a pressing block;

[0016] The clamping block includes an upper clamping block and a lower clamping block, the upper clamping block is fixed to the lower surface of the lower side of the linear movable frame, the upper clamping block and the lower clamping block are fixedly connected by a clamping block bolt, the upper end of the lower clamping block is provided with a clamping groove, the linear movable transmission belt passes through the clamping groove, and the lower surface of the upper clamping block is provided with a clamping protrusion, which is used to clamp the linear movable transmission belt located in the clamping groove.

[0017] Preferably, a linear slide rail is fixed on the supporting base plate, and a linear slider is provided on the lower surface of the linear movable frame, and the linear slider is slidably connected to the linear slide rail.

[0018] Preferably, the drawstring winding device includes a drawstring mounting bracket, one end of the drawstring mounting bracket is rotatably connected to a winding wheel, the other end of the drawstring mounting bracket is rotatably connected to a reeling wheel, one end of the drawstring body is wound around the reeling wheel, and the other end of the drawstring body is fixedly connected to the reeling wheel;

[0019] A belt drive motor is fixed on the linear movable frame, a belt drive active wheel is installed on the output shaft of the belt drive motor, a belt drive driven wheel is fixed on one end of the winding wheel, and the belt drive active wheel and the belt drive driven wheel are connected by a belt drive transmission belt.

[0020] Preferably, a first solenoid valve is installed at the first interface, a second solenoid valve is installed at the second interface, and a third solenoid valve is installed at the third interface. The first interface is connected to the ion accelerator through an acceleration pipe, and an ion transport control valve is provided on the acceleration pipe. The first solenoid valve, the second solenoid valve, the third solenoid valve and the ion transport control valve are all electrically connected to the control device.

[0021] Preferably, the inflation device is a gas tank; and the vacuum device is a vacuum pump.

[0022] Preferably, a shielding device is provided between the detection device and the vacuum isolation chamber.

[0023] The present invention also discloses a collection and separation method of a fission fragment collection and activity separation device, comprising the following steps:

[0024] S1. Before the experiment begins, the vacuum chamber and the vacuum isolation chamber are in a vacuum state, so that the fourth interface can absorb the drawstring body and the drawstring body can block the fourth interface;

[0025] S2. At the start of the experiment, the first interface is opened, the second interface and the third interface are closed, and the ion beam emitted by the ion accelerator passes through the vacuum chamber and the vacuum isolation chamber in sequence and is collected at the collection point of the pull belt body;

[0026] S3, starting the inflation device to release the adsorption of the fourth interface on the drawstring body, and using the linear drive device to move the drawstring body to the detection device for detection;

[0027] S4. After the detection work is completed, the linear drive device is used to drive the drawstring body back to its original position, and then the drawstring winding device is driven to move the drawstring body so that the next collection point of the drawstring body is aligned with the fourth interface;

[0028] S5. Turn off the inflation device and turn on the vacuum device, and use the vacuum device to evacuate the vacuum chamber and the vacuum isolation chamber to a vacuum state, so that the fourth interface absorbs the drawstring body again.

[0029] Compared with the prior art, the present invention has achieved the following technical effects:

[0030] The present invention sets up a vacuum chamber and a vacuum isolation chamber, so that the ion beam emitted by the ion accelerator can pass through the vacuum environment of the vacuum chamber and the vacuum isolation chamber and be collected on the pull belt body. The entire device only has the vacuum chamber and the inside of the vacuum isolation chamber as a vacuum environment, and they are all installed in an air environment, so there is no need to set up a large-volume vacuum structure, so the manufacturing cost is low.

[0031] In addition, the present invention can fine-tune the position of the tape body by driving the tape winding device, so that the experiment can use a new collection point on the tape body to collect the ion beam, avoiding the continuous accumulation of medium and long-lived daughter nuclides at the same collection point, thereby affecting the experimental accuracy, thereby achieving the technical effect of activity separation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a schematic structural diagram from a first perspective of a fission fragment collection and activity separation device according to Example 1;

[0034] Figure 2 This is a schematic structural diagram of the fission fragment collection and activity separation device from a second perspective according to Example 1;

[0035] In the figure: 1-support base plate; 2-linear motion drive motor; 3-linear motion active wheel; 4-linear motion transmission belt; 5-linear motion driven wheel; 6-linear motion frame; 7-pull belt mounting bracket; 8-pull belt drive motor; 9-pull belt drive active wheel; 10-pull belt drive driven wheel; 11-pull belt drive transmission belt; 12-vacuum isolation chamber; 1201-first interface; 1202-second interface; 1203-third interface; 1204-fourth interface; 13-vacuum chamber; 14-ion transport control valve; 15-acceleration pipeline; 16-linear slide rail; 17-linear slider; 18-pressing block; 19-pull belt body; 20-rewinding wheel; 21-unrewinding wheel; 22-detection device; 23-shielding device; 100-fission fragment collection and activity separation device. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] The object of the present invention is to provide a fission fragment collection and activity separation device and a collection and separation method to solve the problems existing in the above-mentioned prior art, improve experimental accuracy, and reduce manufacturing costs.

[0038] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] like Figure 1-Figure 2 As shown, this embodiment provides a fission fragment collection and activity separation device 100, comprising:

[0041] The supporting base plate 1 is a rectangular plate structure, which serves as the supporting structure of the entire device and is used to support various components above it.

[0042] The linear drive device is installed at the upper end of the supporting base plate 1.

[0043] The strap winding device is installed on the linear drive device, and the strap winding device is connected to the strap body 19. The linear drive device can drive the strap winding device and the strap body 19 to move toward the detection device 22. The strap winding device is used to drive the strap body 19 to move a short distance, and the moving direction of the strap body 19 driven by the strap winding device is perpendicular to the moving direction of the strap body 19 driven by the linear drive device.

[0044] The vacuum isolation chamber 12 is provided with a first interface 1201, a second interface 1202, a third interface 1203 and a fourth interface 1204. Figure 1 or Figure 2 It is not difficult to see that the vacuum isolation chamber 12 is a cross-shaped four-way structure, and the first interface 1201, the second interface 1202, the third interface 1203 and the fourth interface 1204 are respectively located at the four ends of the "cross". Among them, the second interface 1202 is connected to an inflation device, and the inflation device can fill the vacuum isolation chamber 12 with gas. The third interface 1203 is connected to a vacuum device, and the vacuum device can remove the gas in the vacuum isolation chamber 12 and the vacuum chamber 13 to make it present a vacuum state. When the vacuum isolation chamber 12 is in a negative pressure state, the fourth interface 1204 is used to adsorb the drawstring body 19, and in order to improve the sealing between the drawstring body 19 and the fourth interface 1204, a sealing ring can also be provided at the fourth interface 1204. When the drawstring body 19 is adsorbed at the fourth interface 1204, the pulling body is actually in contact with the sealing ring.

[0045] And a vacuum chamber 13, one end of the vacuum chamber 13 is connected to the first interface 1201, and the other end of the vacuum chamber 13 is connected to the ion accelerator. The ion accelerator can be an existing heavy ion accelerator or a light ion accelerator, etc. The specific equipment can adopt any one of the existing serial accelerator, electrostatic accelerator, cyclotron accelerator or linear accelerator.

[0046] Before the experiment begins, the vacuum chamber 13 and the vacuum isolation chamber 12 are in a vacuum state, so that the fourth interface 1204 can adsorb the tape body 19, and the tape body 19 can block the fourth interface 1204. At the beginning of the experiment, the first interface 1201 is opened, the second interface 1202 and the third interface 1203 are closed, and the ion beam emitted by the ion accelerator will pass through the vacuum chamber 13 and the vacuum isolation chamber 12 in turn and be collected at the collection point of the tape body 19. The inflation device is started to release the adsorption of the fourth interface 1204 on the tape body 19, and the linear drive device is used to drive the tape body 19 to move to the detection device 22 for detection. After the detection work is completed, the linear drive device is used to drive the tape body 19 back to its original position, and then the tape winding device is driven to drive the tape body 19 to move, so that the next collection point of the tape body 19 is aligned with the fourth interface 1204, so as to avoid the continuous accumulation of medium and long-lived daughter nuclides at the same collection point. The inflator is closed and the vacuum device is opened. The vacuum device is used to evacuate the vacuum chamber 13 and the vacuum isolation chamber 12 to a vacuum state, so that the fourth interface 1204 again absorbs the drawstring body 19. This completes a working process to achieve activity separation. If multiple tests are required, the above working process can be repeated.

[0047] In this embodiment, the linear drive device includes a linear motion drive motor 2, which can be an existing servo motor. The shell of the linear motion drive motor 2 can be installed on the upper surface of the support base plate 1 by bolts. The output shaft of the linear motion drive motor 2 is installed with a linear motion driving wheel 3 by a key connection. The linear motion driving wheel 3 is connected to the linear motion driven wheel 5 through a linear motion transmission belt 4. The two ends of the central axis of the linear motion driven wheel 5 can be rotatably connected to a driven wheel support, and the driven wheel support is fixed to the support base plate 1 by bolts.

[0048] In actual use, the staff only needs to start the linear motion drive motor 2 to drive the linear motion active wheel 3 to rotate. The rotation of the linear motion active wheel 3 drives the linear motion transmission belt 4 to run. Since the belt winding device is installed on the linear motion transmission belt 4 and is relatively fixed to the linear motion transmission belt 4, when the linear motion transmission belt 4 is running, it can drive the belt winding device to move back and forth linearly.

[0049] In this embodiment, to achieve a fixed connection between the linearly movable transmission belt 4 and the belt reel, a linearly movable frame 6 is fixed to the linearly movable transmission belt 4, and the belt reel is mounted on the upper end of the linearly movable frame 6. That is, the upper and lower ends of the linearly movable frame 6 are fixedly connected to the belt reel and the linearly movable transmission belt 4, respectively, thereby achieving a fixed connection between the belt reel and the linearly movable transmission belt 4.

[0050] In this embodiment, if Figure 2 As can be clearly seen in the figure, the linear motion frame 6 is a rectangular frame structure. The lower surface of the linear motion frame 6 below is connected with the linear motion transmission belt 4 through a pressing block 18.

[0051] Regarding the specific structure of the clamping block 18, the clamping block 18 includes an upper clamping block and a lower clamping block, both of which are rectangular plate structures. The upper clamping block is fixed to the lower surface of the lower side of the linear movable frame 6 by bolts or welding. The upper and lower clamping blocks are fixedly connected by clamping block bolts, and the lower clamping block is located at the lower end of the upper clamping block. The upper end of the lower clamping block is provided with a clamping groove, through which the linear movable transmission belt 4 can pass. The lower surface of the upper clamping block is provided with a wavy clamping protrusion. When the upper and lower clamping blocks are fixed and the linear movable transmission belt 4 passes through the clamping groove, the clamping protrusion is used to clamp the linear movable transmission belt 4 located in the clamping groove, thereby achieving the fixing effect of the linear movable transmission belt 4 and the clamping block 18, and further achieving the fixing of the linear movable transmission belt 4 and the linear movable frame 6.

[0052] In this embodiment, to ensure that the linear movable frame 6 can stably move along a straight line under the drive of the linear movable transmission belt 4, a linear guide rail 16 is further fixed to the support base plate 1 by bolts, and a linear slider 17 is fixed to the lower surface of the linear movable frame 6 by bolts. The linear slider 17 cooperates with the linear guide rail 16 and is slidably connected to the linear guide rail 16. The sliding cooperation between the linear slider 17 and the linear guide rail 16 not only supports the linear movable frame 6, but also limits the linear movable frame 6, allowing it to move along the linear direction of the linear guide rail 16.

[0053] In this embodiment, the strap reel device includes a strap mounting bracket 7, which can be fixed to the upper end of the linear movable frame 6 by welding or bolts. One end of the strap mounting bracket 7 is rotatably connected to a reel 20, and the other end of the strap mounting bracket 7 is rotatably connected to a reel 21. One end of the strap body 19 is wound around the reel 21, and the other end of the strap body 19 is fixedly connected to the reel 20. Before the experiment, most of the strap body 19 was wound around the reel, with only one end being connected to the reel 20.

[0054] A belt drive motor 8 is fixed to the linear motion frame 6 by bolts. The belt drive motor 8 can be an existing stepper motor. The output shaft of the belt drive motor 8 is mounted with a belt drive driving pulley 9. A belt drive driven pulley 10 is fixed to one end of the winding wheel 20. The belt drive driven pulley 10 is fixed to the central axis of the winding wheel 20. The belt drive driving pulley 9 and the belt drive driven pulley 10 are connected by a belt drive transmission belt 11.

[0055] When it is necessary to fine-tune the position of the drawstring body 19, thereby changing the position of the collection point, it is only necessary to start the drawstring drive motor 8. The drawstring drive motor 8 drives the drawstring drive driven wheel 10 through the drawstring drive active wheel 9 and the drawstring drive transmission belt 11, and then the drawstring drive driven wheel 10 drives the reel 20 to rotate. As the reel 20 rotates, it drives the drawstring body 19 to gradually wind around the reel 20. At the same time, the drawstring body 19 drives the unwinding wheel 21 to rotate, so that the unwinding wheel 21 releases part of the drawstring body 19, thereby realizing the movement of the drawstring body 19 and the replacement of a new collection point.

[0056] In this embodiment, a first solenoid valve is installed at the first interface 1201, a second solenoid valve is installed at the second interface 1202, and a third solenoid valve is installed at the third interface 1203. The first interface 1201 is connected to the ion accelerator via an acceleration pipe 15, and an ion transport control valve 14 is installed on the acceleration pipe 15. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the ion transport control valve 14 are all electrically connected to a control device. The control device includes a timing controller and a relay. The first solenoid valve, the second solenoid valve, the third solenoid valve, and the ion transport control valve 14 are each electrically connected to the timing controller via a corresponding relay. In actual use, the operation of each valve is coordinated by the timing controller, and logic signals control the operation of the corresponding valves through the relays to ensure precise operation at each stage.

[0057] The first solenoid valve, the second solenoid valve, the third solenoid valve and the ion transport control valve 14 are all existing DC solenoid valves, the opening and closing time of which is controlled in milliseconds and supports high-frequency circulation.

[0058] In this embodiment, the inflation device is a gas tank connected to the second port 1202 via an inflation line. The gas tank can store relatively stable gases such as nitrogen, argon, or helium, with the appropriate gas selected based on the experiment. The vacuum device is a vacuum pump connected to the third port 1203 via a vacuum line. The vacuum pump is used to evacuate the gas within the isolation chamber 12 and the vacuum chamber 13, creating a vacuum state.

[0059] In this embodiment, a shielding device 23 is provided between the detection device 22 and the vacuum isolation chamber 12 . The purpose of providing the shielding device 23 is to prevent gas leakage from the vacuum isolation chamber 12 from flowing into the detection device 22 and affecting the detection accuracy of the detection device 22 .

[0060] The detection device 22 can be an existing high-purity germanium detector.

[0061] The shielding device 23 can be made of existing lead plates or lead bricks. The shielding device 23 can be set at any position between the vacuum isolator and the detection device 22, or it can be directly installed on the outer shell of the detection device 22, as long as it can isolate the leaked gas from the vacuum isolation chamber 12.

[0062] Example 2

[0063] This embodiment provides a collection and separation method for a fission fragment collection and activity separation device, based on the fission fragment collection and activity separation device 100 disclosed in the first embodiment, including the following steps:

[0064] S1. Before the experiment begins, the ion transport control valve 14, the second solenoid valve and the third solenoid valve are all in the closed state, the first solenoid valve is in the open state, the vacuum chamber 13 and the vacuum isolation chamber 12 are in a vacuum state, so that the fourth interface 1204 can absorb the pull belt body 19, and the pull belt body 19 can block the fourth interface 1204.

[0065] S2. At the beginning of the experiment, the first interface 1201 is in the open state, the second interface 1202 and the third interface 1203 are in the closed state, and then the ion transport control valve 14 is opened, so that the ion beam emitted by the ion accelerator will pass through the vacuum chamber 13 and the vacuum isolation chamber 12 in turn and be collected at the collection point of the pull belt body 19.

[0066] S3. Open the second solenoid valve, activate the inflation device, and use the inflation device to fill the vacuum isolation chamber 12 with gas, so that the air pressure in the vacuum isolation chamber 12 is greater than the external atmospheric pressure, thereby releasing the adsorption of the fourth interface 1204 on the drawstring body 19. The linear drive device is then used to move the drawstring body 19 to the detection device 22 for detection.

[0067] S4. After the detection work is completed, the linear drive device is used to drive the last collection point of the drawstring body 19 back to its original position. It should be noted that in the process of the drawstring body 19 returning, the short-lived radioactive isotopes have basically decayed completely, and the medium- and long-lived radioactive isotopes collected last time are still residual on the original collection point. The drawstring winding device is then driven to drive the drawstring body 19 to move slightly, so that the next collection point of the drawstring body 19 is aligned with the fourth interface 1204, thereby avoiding the continuous accumulation of medium- and long-lived radioactive isotopes. Of course, the linear drive device and the drawstring collection device can be operated separately or simultaneously, without obstructing each other. In addition, since the drawstring body 19 is an aluminum-plated polyester film, its own weight is relatively light, making it easy to be adsorbed, and the linear drive device is used to drive it to move quickly (to complete the experimental requirements), and the purpose of using the drawstring winding device to drive itself to move slowly is to avoid it being broken and damaged.

[0068] S5. Close the second solenoid valve, the inflation device and the ion transport control valve 14 and open the third solenoid valve and the vacuum device. Use the vacuum device to evacuate the vacuum chamber 13 and the vacuum isolation chamber 12 to a vacuum state, so that the fourth interface 1204 adsorbs the drawstring body 19 again, thereby preparing for the next detection experiment.

[0069] The high-frequency cycling capability of this embodiment is an operating frequency of 0.1-1 Hz and a sub-second transmission time of less than 1 second to complete the collection, making it suitable for the study of short-lived isotopes with a half-life of ≥100 ms.

[0070] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A fission fragment collection and activity separation device, characterized in that: include: Support base plate (1); A linear drive device, the linear drive device being mounted on the upper end of the supporting base plate (1); A belt reeling device, the belt reeling device is mounted on the linear drive device, the belt reeling device is connected to a belt body (19), the linear drive device can drive the belt reeling device and the belt body (19) to move toward the detection device (22), and the belt reeling device is used to drive the belt body (19) to move; A vacuum isolation chamber (12), wherein the vacuum isolation chamber (12) is provided with a first interface (1201), a second interface (1202), a third interface (1203) and a fourth interface (1204), wherein the second interface (1202) is connected to an inflation device, and the third interface (1203) is connected to a vacuum device, and when the vacuum isolation chamber (12) is in a negative pressure state, the fourth interface (1204) is used to adsorb the drawstring body (19); and A vacuum chamber (13), one end of the vacuum chamber (13) is connected to the first interface (1201), and the other end of the vacuum chamber (13) is connected to the ion accelerator.

2. The fission fragment collection and activity separation device according to claim 1, characterized in that: The linear drive device comprises a linear motion drive motor (2), the linear motion drive motor (2) is mounted on the upper surface of the support base plate (1), a linear motion driving wheel (3) is mounted on the output shaft of the linear motion drive motor (2), the linear motion driving wheel (3) is connected to the linear motion driven wheel (5) through a linear motion transmission belt (4), and the belt winding device is mounted on the linear motion transmission belt (4).

3. The fission fragment collection and activity separation device according to claim 2, characterized in that: A linear moving frame (6) is fixed on the linear moving transmission belt (4), and the upper end of the linear moving frame (6) is installed with the belt winding device.

4. The fission fragment collection and activity separation device according to claim 3, characterized in that: The linear moving frame (6) is a rectangular frame structure, and the lower surface of the lower side of the linear moving frame (6) is connected to the linear moving transmission belt (4) via a pressing block (18); The clamping block (18) includes an upper clamping block and a lower clamping block, wherein the upper clamping block is fixed to the lower surface of the lower side of the linear movable frame (6), and the upper clamping block and the lower clamping block are fixedly connected by clamping block bolts, and the upper end of the lower clamping block is provided with a clamping groove, and the linear movable transmission belt (4) passes through the clamping groove, and the lower surface of the upper clamping block is provided with a clamping protrusion, and the clamping protrusion is used to clamp the linear movable transmission belt (4) located in the clamping groove.

5. The fission fragment collection and activity separation device according to claim 3, characterized in that: A linear slide rail (16) is fixed on the supporting base plate (1), and a linear slider (17) is provided on the lower surface of the linear movable frame (6). The linear slider (17) is slidably connected to the linear slide rail (16).

6. The fission fragment collection and activity separation device according to claim 1, characterized in that: The drawstring winding device comprises a drawstring mounting bracket, one end of the drawstring mounting bracket is rotatably connected to a winding wheel (20), the other end of the drawstring mounting bracket is rotatably connected to a reeling wheel (21), one end of the drawstring body (19) is wound around the reeling wheel (21), and the other end of the drawstring body (19) is fixedly connected to the reeling wheel (20); A belt drive motor (8) is fixed on the linear movable frame (6), a belt drive driving wheel (9) is installed on the output shaft of the belt drive motor (8), a belt drive driven wheel (10) is fixed on one end of the winding wheel (20), and the belt drive driving wheel (9) and the belt drive driven wheel (10) are connected by a belt drive transmission belt.

7. The fission fragment collection and activity separation device according to claim 1, characterized in that: A first solenoid valve is installed at the first interface (1201), a second solenoid valve is installed at the second interface (1202), and a third solenoid valve is installed at the third interface (1203). The first interface (1201) is connected to the ion accelerator via an acceleration pipe (15). An ion transport control valve (14) is provided on the acceleration pipe (15). The first solenoid valve, the second solenoid valve, the third solenoid valve, and the ion transport control valve (14) are all electrically connected to a control device.

8. The fission fragment collection and activity separation device according to claim 1, characterized in that: The inflation device is a gas tank; the vacuum device is a vacuum pump.

9. The fission fragment collection and activity separation device according to claim 1, characterized in that: A shielding device is provided between the detection device (22) and the vacuum isolation chamber (12).

10. A collection and separation method for a fission fragment collection and activity separation device, characterized in that: The fission fragment collection and activity separation device according to any one of claims 1 to 9 comprises the following steps: S1. Before the experiment begins, the vacuum chamber (13) and the vacuum isolation chamber (12) are in a vacuum state, so that the fourth interface (1204) can absorb the drawstring body (19), and the drawstring body (19) can block the fourth interface (1204); S2. At the beginning of the experiment, the first interface (1201) is opened, the second interface (1202) and the third interface (1203) are closed, and the ion beam emitted by the ion accelerator passes through the vacuum chamber (13) and the vacuum isolation chamber (12) in sequence and is collected at the collection point of the pull belt body (19); S3, starting the inflation device, releasing the adsorption of the fourth interface (1204) on the drawstring body (19), and using the linear drive device to drive the drawstring body (19) to move to the detection device for detection; S4. After the detection work is completed, the linear drive device is used to drive the drawstring body (19) back to its original position, and then the drawstring winding device is driven to drive the drawstring body (19) to move so that the next collection point of the drawstring body (19) is aligned with the fourth interface (1204); S5. Close the inflation device and open the vacuum device, and use the vacuum device to evacuate the vacuum chamber (13) and the vacuum isolation chamber (12) to a vacuum state, so that the fourth interface (1204) adsorbs the drawstring body (19) again.

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