Radioactive aerosol filter paper tape paper taking mechanism with variable step pitch and detection device

Abstract

The invention relates to a variable-step-pitch radioactive aerosol filter paper taking mechanism and a detection device, the variable-step-pitch radioactive aerosol filter paper taking mechanism comprises a mounting bracket, a paper feeding auxiliary adjusting mechanism is arranged on one side of the mounting bracket, and a detection device body is arranged on one side of the mounting bracket; according to the device, the stepping motor is arranged to drive the winding action of the filter paper tape body, and the transmission shaft, the winding rod and the speed-adjustable control system are matched, so that the fine control of the sampling spacing is realized, and the device is suitable for the collection requirements of radioactive aerosols with different strengths or periods; the step pitch can be flexibly set according to actual working conditions, the use efficiency of filter paper is improved, the response capacity of a monitoring system to sudden radioactive events is enhanced, meanwhile, error accumulation is avoided through coordinated arrangement between the paper feeding mechanism and the detection device body, closed-loop control over the sampling and detection process is achieved, and the detection efficiency is improved. And the precision and the practicability of the whole device can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive detection, in particular to a radioactive aerosol filter paper taking-off mechanism with variable step distance and a detection device. Background Art

[0002] In nuclear power plants, radioactive laboratories, atmospheric environment monitoring stations and other places, in order to achieve continuous monitoring of radioactive aerosols in the air, a continuous sampling device in the form of a filter paper belt is usually used. The filter paper belt is moved by a winding mechanism, and its radiation dose is detected in the sampling area.

[0003] In the actual implementation process, there are still some problems: 1. In the existing technology, the filter paper feeding mechanism mostly adopts a constant step drive mode, that is, the filter paper strip is driven at a fixed time interval and fixed distance. Although the structure is relatively simple, its rigid design cannot be flexibly adjusted when facing different radioactive aerosol concentrations, sampling frequencies and monitoring sensitivity requirements, which is not conducive to the optimization of resource utilization. At the same time, the detection probe is often fixed above the sampling window and lacks the position fine-tuning function. It is easy to cause detection errors due to factors such as differences in filter paper strip thickness and installation errors. In addition, the internal structure and functional integration of some devices are insufficient, and the paper feeding control and probe adjustment cannot be synchronized and coordinated, which affects the sampling accuracy and equipment stability. 2. The filter paper feeding mechanism used for radioactive aerosol detection is mostly mechanical or servo-controlled. The paper feeding process generally adopts a simple reel drive and limit guide combination. The spacing distance of the filter paper belt cannot be adjusted according to the actual sampling needs, and it is difficult to meet the requirements for changing step distances under different monitoring conditions. At the same time, the detection probe is usually directly fixed in the device body and lacks an effective adjustment mechanism. It is impossible to perform vertical fine-tuning according to the changes in the number of filter paper layers or the detection sensitivity requirements, which can easily lead to probe alignment deviation and thus affect the monitoring accuracy. In addition, the existing device has not formed an effective coordination mechanism between the two key links of filter paper movement and data detection. The operator needs to frequently calibrate through manual adjustment, resulting in low detection efficiency, more manual intervention, and difficulty in achieving remote real-time monitoring and intelligent control. Summary of the Invention

[0004] (1) Technical issues to be resolved In order to solve the above problems in the prior art, the present invention provides a radioactive aerosol filter paper feeding mechanism and a detection device with a variable step distance, which solves the problem of incoordination between traditional filter paper feeding and detection adjustment.

[0005] (2) Technical solution In order to achieve the above object, the main technical solutions adopted by the present invention are: A radioactive aerosol filter paper with variable step distance and a detection device, comprising a mounting bracket, a paper feeding auxiliary adjustment mechanism provided on one side of the mounting bracket, a detection device body provided on one side of the mounting bracket, a probe adjustment mechanism provided inside the detection device body, the paper feeding auxiliary adjustment mechanism comprising a stepping motor, a transmission shaft, a transmission rod and a winding rod, the output end of the stepping motor is fixedly connected to the transmission shaft, one end of the transmission shaft is fixedly connected to the winding rod, the probe adjustment mechanism comprises a threaded groove, a threaded barrel and an adjustment plate, the inner wall of the detection device body is provided with a threaded groove, the inner wall of the threaded groove is threadedly connected to a threaded barrel, and the bottom end of the threaded barrel is rotatably connected to the adjustment plate.

[0006] A support is fixedly connected to one side wall of the mounting bracket, a transmission rod is rotatably connected to the inner side of the support, and a transmission motor is fixedly connected to the outer side of the support.

[0007] The output end of the transmission motor is fixedly connected with a connecting rod, and the inner wall of the mounting bracket is fixedly connected with a limiting rod.

[0008] The outer wall of the limiting rod is slidably connected to a sliding plate, the top end of the sliding plate is fixedly connected to a moving plate, and the middle portion of the sliding plate is threadedly connected to a screw rod.

[0009] The screw rod is rotatably connected to the inner wall of the mounting bracket, and one end of the screw rod is fixedly connected to one end of the connecting rod.

[0010] The top end of the sliding plate is fixedly connected to a mounting bracket, the outer side of the mounting bracket is fixedly connected to a stepping motor, and one end of the transmission shaft is rotatably connected to the outer surface of the mounting bracket.

[0011] The outer wall of the winding rod is fixedly connected with a sleeve, the outer side of the sleeve is sleeved with a radioactive aerosol filter paper tape body, and one end of the radioactive aerosol filter paper tape body is fixedly connected to the outer wall of the sleeve.

[0012] A detection device is provided, wherein the outer side of the detection device body is connected to a monitoring display, and the middle part of the detection device body is installed with a sensor.

[0013] The inner wall of the detection device body is vertically slidably connected with a detection probe, and the top end of the detection probe is fixedly connected with a transmission plate.

[0014] The top end of the transmission plate is fixedly connected to the bottom end of the adjustment plate, the detection probe is electrically connected to the monitoring display, a side wall of the mounting bracket is fixedly connected to a support plate, and one side of the support plate is fixedly connected to the detection device body.

[0015] (3) Beneficial effects The beneficial effects of the present invention are: 1. In the present invention, a stepper motor is provided to drive the winding action of the filter paper strip body, and in conjunction with a drive shaft, a winding rod, and an adjustable speed control system, fine control of the sampling interval is achieved to adapt to the needs of collecting radioactive aerosols of different intensities or periods. Compared with the traditional fixed-distance paper feed structure, the present invention can flexibly set the step distance according to actual working conditions, thereby improving the efficiency of filter paper use and enhancing the monitoring system's response to sudden radioactive events. At the same time, the coordinated arrangement between the paper feed mechanism and the detection device body avoids error accumulation, realizes closed-loop control of the sampling and detection process, and helps to improve the accuracy and practicality of the entire device. 2. In the present invention, by providing a detection probe adjustment mechanism, the alignment accuracy of the detection probe to the filter paper belt body can be effectively improved, thereby improving the accuracy of radioactive particulate matter detection. The cooperation between the threaded barrel and the threaded groove realizes the fine adjustment of the detection probe inside the detection device body, meeting the diverse needs of different filter paper thicknesses or sampling window heights. In addition, through the integrated use of the monitoring display and the sensor, the detection information can be displayed in real time and remotely output, which is convenient for operators to monitor the system status and sampling progress. The overall structure is simple and reliable, with good mechanical stability and easy operation. It is particularly suitable for continuous detection and data collection of radioactive aerosols in places with high safety requirements such as nuclear power plants and radioactive laboratories. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic structural diagram of the mounting bracket portion of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 It is a structural cross-sectional view of the mounting bracket portion of the present invention; Figure 5 It is a structural cross-sectional view of the main body of the detection device of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle.

[0017] [Description of Reference Numerals] 1. Mounting bracket; 2. Radioactive aerosol filter paper belt body; 3. Paper feed auxiliary adjustment mechanism; 301. Transmission motor; 302. Connecting rod; 303. Transmission rod; 304. Stepping motor; 305. Winding rod; 306. Sliding plate; 307. Screw; 308. Moving plate; 309. Limiting rod; 310. Mounting bracket; 311. Transmission shaft; 312. Sleeve; 4. Detection device body; 5. Support; 6. Probe adjustment mechanism; 601. Monitoring display; 602. Sensor; 603. Detection probe; 604. Adjustment plate; 605. Threaded barrel; 606. Threaded groove; 607. Transmission plate; 7. Support plate. DETAILED DESCRIPTION

[0018] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.

[0019] Please refer to Figures 1 to 6 As shown, a radioactive aerosol filter paper with variable step distance and a paper-feeding mechanism and a detection device of the present invention include a mounting bracket 1, a paper-feeding auxiliary adjustment mechanism 3 is provided on one side of the mounting bracket 1, a detection device body 4 is provided on one side of the mounting bracket 1, and a probe adjustment mechanism 6 is provided inside the detection device body 4. The paper-feeding auxiliary adjustment mechanism 3 includes a stepping motor 304, a transmission shaft 311, a transmission rod 303 and a winding rod 305. The output end of the stepping motor 304 is fixedly connected to the transmission shaft 311, and one end of the transmission shaft 311 is fixedly connected to the winding rod 305. The probe adjustment mechanism 6 includes a threaded groove 606, a threaded barrel 605 and an adjustment plate 604. The inner wall of the detection device body 4 is provided with a threaded groove 606, the inner wall of the threaded groove 606 is threadedly connected to the threaded barrel 605, and the bottom end of the threaded barrel 605 is rotatably connected to the adjustment plate 604.

[0020] Optionally, a support 5 is fixedly connected to one side wall of the mounting bracket 1, a transmission rod 303 is rotatably connected to the inner side of the support 5, and a transmission motor 301 is fixedly connected to the outer side of the support 5. In actual implementation, by providing the support 5 on a side wall of the mounting bracket 1 and rotatably connecting the transmission rod 303 inside the support 5, the rotation of the transmission rod 303 has good support stability. In conjunction with the drive of the transmission motor 301 outside the support 5, the filter paper belt body can be smoothly and synchronously transported, ensuring uniform force during the paper feeding process and improving the reliability of the structural operation.

[0021] Optionally, the output end of the transmission motor 301 is fixedly connected to a connecting rod 302, and the inner wall of the mounting bracket 1 is fixedly connected to a limiting rod 309. In actual implementation, the fixed connection between the output end of the transmission motor 301 and the transmission rod 303 forms a closed power chain loop, which is then guided and limited by the limiting rod 309 provided on the inner wall of the mounting bracket 1, effectively preventing sliding component deviation, improving the stability of filter paper feeding and the controllability of the transmission structure, and enhancing the accuracy maintenance capability of the equipment.

[0022] Optionally, a sliding plate 306 is slidably connected to the outer wall of the limiting rod 309, a movable plate 308 is fixedly connected to the top of the sliding plate 306, and a screw 307 is threadedly connected to the middle portion of the sliding plate 306. In actual implementation, by slidably connecting the sliding plate 306 to the outer wall of the limiting rod 309, providing the movable plate 308 at the top of the sliding plate 306, and utilizing the thread adjustment function of the middle screw 307, fine-tuning and alignment correction of the filter paper conveying system can be achieved, which helps to accurately match the filter paper path with the detection area and improve sampling accuracy.

[0023] Optionally, the screw rod 307 is rotatably connected to the inner wall of the mounting bracket 1, and one end of the screw rod 307 is fixedly connected to one end of the connecting rod 302. In actual implementation, the screw rod 307 is rotatably connected to the inner wall of the mounting bracket 1, and one end of the screw rod 307 is fixedly connected to the transmission rod 303, so that power input can drive the sliding mechanism through the screw rod 307 to perform linear displacement adjustment, thereby achieving precise control of the pitch length of the filter paper strip body under different monitoring requirements.

[0024] Optionally, a mounting bracket 310 is fixedly connected to the top of the sliding plate 306. The outer side of the mounting bracket 310 is fixedly connected to the stepper motor 304. One end of the transmission shaft 311 is rotatably connected to the outer surface of the mounting bracket 310. In actual implementation, the top of the sliding plate 306 is fixedly connected to the mounting bracket 310. By disposing the stepper motor 304 outside the mounting bracket 310, the rotation speed and angle of the transmission shaft 311 are precisely controlled, thereby driving the synchronous movement of the winding mechanism, thereby achieving high-precision movement control and automatic position change of the filter paper strip body.

[0025] Optionally, a sleeve 312 is fixedly connected to the outer wall of the winding rod 305. The radioactive aerosol filter paper strip body 2 is sleeved on the outer side of the sleeve 312, and one end of the radioactive aerosol filter paper strip body 2 is fixedly connected to the outer wall of the sleeve 312. In actual implementation, by providing the sleeve 312 on the outer wall of the winding rod 305 and sleeved on the outer side of the sleeve 312, the filter paper winding is more neat and compact, effectively preventing slippage or tangling during operation. At the same time, fixing one end of the filter paper strip body to the outer wall of the sleeve 312 facilitates installation and replacement, thereby enhancing operational efficiency.

[0026] Optionally, a detection device is provided in which a monitoring display 601 is connected to the outer side of the detection device body 4, and a sensor 602 is installed in the middle of the detection device body 4. In actual implementation, the monitoring display 601 installed on the outer side of the detection device body 4 allows for real-time display of detection data, allowing the user to readily monitor changes in aerosol concentration. The sensor 602 installed in the middle can collect signals in real time, forming a rapid response mechanism and enhancing the practical performance of the detection device body 4.

[0027] Optionally, a detection probe 603 is vertically slidably connected to the inner wall of the detection device body 4, and a transmission plate 607 is fixedly connected to the top of the detection probe 603. In actual implementation, by vertically slidably connecting the detection probe 603 to the inner wall of the detection device body 4, the detection probe 603 can be precisely adjusted up and down according to the position of the filter paper strip body, avoiding deviation between the detection probe 603 and the filter paper. At the same time, the transmission plate 607 fixed to the top facilitates synchronization adjustment, thereby improving detection accuracy.

[0028] Optionally, the top of the transmission plate 607 is fixedly connected to the bottom of the adjustment plate 604, the detection probe 603 is electrically connected to the monitoring display 601, and a support plate 7 is fixedly connected to a side wall of the mounting bracket 1, one side of which is fixedly connected to the detection device body 4. In actual implementation, the fixed connection between the transmission plate 607 and the bottom of the adjustment plate 604 enables the detection probe 603 lifting and lowering adjustment mechanism to be linked to the paper feed control; the detection probe 603 is electrically connected to the monitoring display 601, achieving real-time feedback of the detection results; and the support plate 7 is also fixedly connected to the detection device body 4 to enhance the stability of the overall structure.

[0029] Working principle: The stepper motor 304 drives the transmission shaft 311 to rotate, thereby driving the winding rod 305 connected to the end of the transmission shaft 311 to rotate, thereby realizing variable step-type winding movement of the radioactive aerosol filter paper belt body 2 sleeved on the outside of the winding rod 305. By adjusting the driving parameters of the stepper motor 304, the distance the filter paper belt body is driven to move each time can be flexibly controlled according to different monitoring cycles or sampling accuracy requirements, thereby realizing the variable step-length control function. On this basis, the interior of the detection device body 4 is provided with a probe adjustment mechanism 6, which is threadedly connected to the inner wall of the detection device body 4 by the threaded barrel 605. The screw thread groove 606 is provided with a rotatable adjustment plate 604 at its bottom end to realize fine adjustment of the position of the detection probe 603 in the vertical direction. The detection probe 603 is fixedly connected to the transmission plate 607, and the transmission plate 607 is rigidly connected to the bottom end of the adjustment plate 604. When the adjustment plate 604 rotates, the detection probe 603 can be driven to rise and fall accurately so that it is always aligned with the effective monitoring area of ​​the filter paper belt body. After the above structures work together, the controllable drive, automatic replacement and high-precision alignment detection of the filter paper belt body are realized, thereby improving the intelligence and adaptability of the detection device. The transmission motor 301 provided on the side wall of the mounting bracket 1 is provided with The driving transmission rod 303 rotates, thereby driving the sliding plate 306 to slide on the limiting rod 309, so that the sliding plate 306 drives the moving plate 308 and the mounting bracket 310 on its top to move horizontally or vertically, thereby realizing the adjustment and coordination of the entire paper-taking mechanism. A stepping motor 304 is provided on the outside of the mounting bracket 310, which further drives the winding rod 305 through the transmission shaft 311 to complete the winding of the filter paper belt body. At the same time, the sensor 602 installed in the middle of the detection device body 4 can monitor the radioactive particles suspended in the air in real time, and feed back the sampling area to the monitoring display 601 through the detection probe 603. In order to improve the detection accuracy, the detection device body 4 is provided with a detection probe 603 with a vertical sliding connection, and a stable connection is achieved with the transmission plate 607 through the adjustment plate 604, ensuring that the detection probe 603 performs effective detection after aligning with the sampling position of the filter paper belt body. The structure can adjust the position of the detection probe 603 automatically or manually, and at the same time, the alignment and leveling of the whole machine are completed with the help of the cooperation of the sliding plate 306 and the limit rod 309. During the overall operation, the control system completes the whole process of sampling, detection, data display and filter paper belt updating through the coordinated action of the sensor 602, the monitoring display 601 and the stepping drive, and has a high degree of integration and automatic control capabilities.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0031] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A radioactive aerosol filter paper removal mechanism with variable step distance, comprising a mounting bracket (1), characterized in that: A paper feeding auxiliary adjustment mechanism (3) is provided on one side of the mounting bracket (1), a detection device body (4) is provided on one side of the mounting bracket (1), and a probe adjustment mechanism (6) is provided inside the detection device body (4). The paper feeding auxiliary adjustment mechanism (3) comprises a stepping motor (304), a transmission shaft (311), a transmission rod (303) and a winding rod (305), an output end of the stepping motor (304) is fixedly connected to the transmission shaft (311), and one end of the transmission shaft (311) is fixedly connected to the winding rod (305), and the probe adjustment mechanism (6) comprises a threaded groove (606), a threaded barrel (605) and an adjustment plate (604), an inner wall of the detection device body (4) is provided with a threaded groove (606), an inner wall of the threaded groove (606) is threadedly connected to the threaded barrel (605), and the bottom end of the threaded barrel (605) is rotatably connected to the adjustment plate (604).

2. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 1, characterized in that: A support (5) is fixedly connected to one side wall of the mounting bracket (1), a transmission rod (303) is rotatably connected to the inner side of the support (5), and a transmission motor (301) is fixedly connected to the outer side of the support (5).

3. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 2, characterized in that: The output end of the transmission motor (301) is fixedly connected to a connecting rod (302), and the inner wall of the mounting bracket (1) is fixedly connected to a limiting rod (309).

4. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 3, characterized in that: The outer wall of the limiting rod (309) is slidably connected to a sliding plate (306), the top end of the sliding plate (306) is fixedly connected to a moving plate (308), and the middle part of the sliding plate (306) is threadedly connected to a screw rod (307).

5. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 4, characterized in that: The screw rod (307) is rotatably connected to the inner wall of the mounting bracket (1), and one end of the screw rod (307) is fixedly connected to one end of the connecting rod (302).

6. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 5, characterized in that: The top end of the sliding plate (306) is fixedly connected to a mounting frame (310), the outer side of the mounting frame (310) is fixedly connected to the stepping motor (304), and one end of the transmission shaft (311) is rotatably connected to the outer surface of the mounting frame (310).

7. The variable-pitch radioactive aerosol filter paper removal mechanism according to claim 6, characterized in that: The outer wall of the winding rod (305) is fixedly connected to a sleeve (312), the outer side of the sleeve (312) is sleeved with a radioactive aerosol filter paper tape body (2), and one end of the radioactive aerosol filter paper tape body (2) is fixedly connected to the outer wall of the sleeve (312).

8. A detection device, characterized in that: The paper feeding mechanism used in claims 1-7 is characterized in that the outer side of the detection device body (4) is connected to a monitoring display (601), and the middle part of the detection device body (4) is equipped with a sensor (602).

9. A detection device according to claim 8, characterized in that: The inner wall of the detection device body (4) is vertically slidably connected to a detection probe (603), and the top end of the detection probe (603) is fixedly connected to a transmission plate (607).

10. A detection device according to claim 9, characterized in that: The top end of the transmission plate (607) is fixedly connected to the bottom end of the adjustment plate (604), the detection probe (603) is electrically connected to the monitoring display (601), and a side wall of the mounting bracket (1) is fixedly connected to a support plate (7), and one side of the support plate (7) is fixedly connected to the detection device body (4).

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