Radioactive aerosol filter paper box device

Abstract

The utility model discloses a radioactive aerosol filter paper box device which comprises a sealed air cavity, filter paper arranged in the sealed air cavity, a filter paper transmission assembly driving the filter paper to move, an air inlet pipeline arranged on the upper portion of the sealed air cavity and an air exhaust pipeline arranged on the lower portion of the sealed air cavity. The filter paper transmission assembly comprises a forward shaft and a reverse shaft which are rotationally arranged in the sealed air cavity, one end of filter paper is connected to the forward shaft, the other end of the filter paper is wound around the reverse shaft, a photoelectric switch is arranged below the filter paper, and a tensiometer is arranged on the lower side of the filter paper. The device is reasonable in structural design, the reverse shaft and the tensiometer are additionally arranged, when filter paper needs to be updated, the forward shaft rotates to drive the filter paper to be tightened, meanwhile, the tensiometer detects the tension of the filter paper, and then the reverse shaft rotates in a self-adaptive mode according to the measured tension; the problems of paper jamming, filter paper breaking, filter paper loosening and the like after long-time operation of a traditional filter paper box can be effectively solved, and long-time stable operation of the filter paper box device is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerosol measuring devices, and particularly relates to a radioactive aerosol filter paper box device. Background Art

[0002] Radioactive aerosol detection equipment draws air from the nearby environment, filters the air, and detects and analyzes the aerosol deposits on the filter paper obtained by filtration. According to the analysis results, the content and type of radioactive aerosols contained in the air can be determined, and the content of various artificial radioactive aerosols and natural radioactive aerosols can be distinguished. At the same time, the results are converted into concentration values for display. Such equipment is usually applied to scenarios such as around nuclear facilities and at nuclear accident sites. It is used to detect the distribution of artificial radionuclides in the air.

[0003] The filter paper box device belongs to the core component of radioactive aerosol detection equipment. The function of the filter paper box device is to complete the periodic update function of the filter paper. The filter paper box device generally includes components such as filter paper, transmission, and sensing systems. The existing filter paper box devices will have problems such as paper jams, filter paper breakage, and filter paper loosening after long-term operation. Therefore, it is necessary to design a radioactive aerosol filter paper box device to solve the above problems. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a radioactive aerosol filter paper box device aiming at the deficiencies in the above-mentioned prior art. Its structure is reasonably designed. By installing a reverse shaft and a tensiometer, when the filter paper needs to be updated, the rotation of the forward shaft drives the filter paper to tighten, and at the same time the tensiometer detects the tension of the filter paper, so that the reverse shaft rotates adaptively according to the measured tension, which can effectively solve the problems of paper jams, filter paper breakage, and filter paper loosening that occur in traditional filter paper boxes after long-term operation, and ensure the long-term stable operation of the filter paper box device.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a radioactive aerosol filter paper box device, which is characterized in that it includes a sealed air chamber, filter paper arranged in the sealed air chamber, a filter paper transmission component for driving the filter paper to move, an air inlet pipeline arranged at the upper part of the sealed air chamber, and an air extraction pipeline arranged at the lower part of the sealed air chamber. The filter paper transmission component includes a forward shaft and a reverse shaft that are both rotatably arranged inside the sealed air chamber. One end of the filter paper is connected to the forward shaft, and the other end of the filter paper is wound around the reverse shaft;

[0006] A photoelectric switch is arranged below the filter paper, the photoelectric switch is arranged close to the forward shaft, and a tensiometer is arranged on the lower side of the filter paper, and the tensiometer is arranged close to the reverse shaft;

[0007] On one side of the sealed air chamber, there is a first driving motor for driving the forward shaft to rotate and a second driving motor for driving the reverse shaft to rotate.

[0008] For the above-mentioned radioactive aerosol filter cartridge device, it is characterized in that: the intake pipeline is located directly above the exhaust pipeline, the forward shaft and the reverse shaft are symmetrically arranged relative to the central axis of the intake pipeline, and the forward shaft and the reverse shaft are respectively located on both sides of the exhaust pipeline.

[0009] For the above-mentioned radioactive aerosol filter cartridge device, it is characterized in that: the photoelectric switch is located between the exhaust pipeline and the forward shaft, and the tensiometer is located between the intake pipeline and the reverse shaft.

[0010] For the above-mentioned radioactive aerosol filter cartridge device, it is characterized in that: a detector is further arranged in the sealed air chamber, and the detector is located between the intake pipeline and the filter paper.

[0011] For the above-mentioned radioactive aerosol filter cartridge device, it is characterized in that: winding wheels for winding the filter paper are arranged on both the forward shaft and the reverse shaft, one end of the filter paper is wound on the winding wheel on the forward shaft, and the other end of the filter paper is wound on the winding wheel on the reverse shaft.

[0012] The utility model has the following advantages compared with the prior art:

[0013] The structure of the utility model is reasonably designed. By adding a reverse shaft and a tensiometer, when the filter paper needs to be updated, the rotation of the forward shaft drives the filter paper to tighten, and at the same time the tensiometer detects the tension of the filter paper, so that the reverse shaft rotates adaptively according to the measured tension, which can effectively solve the problems of paper jamming, filter paper breakage and filter paper loosening that occur after the traditional filter cartridge runs for a long time, and ensure the long-term stable operation of the filter cartridge device.

[0014] The technical solution of the utility model will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Description of the reference numerals:

[0017] 1 - Sealed air chamber; 2 - Intake pipeline; 3 - Exhaust pipeline;

[0018] 4 - Forward shaft; 5 - Reverse shaft; 6 - Filter paper;

[0019] 7 - Photoelectric switch; 8 - Tensiometer; 9 - Detector;

[0020] 10 - Winding wheel. Detailed Embodiments

[0021] As shown Figure 1 in the figure, the utility model includes a sealed air chamber 1, a filter paper 6 arranged in the sealed air chamber 1, a filter paper transmission component for driving the movement of the filter paper 6, an air inlet pipeline 2 arranged at the upper part of the sealed air chamber 1, and an air extraction pipeline 3 arranged at the lower part of the sealed air chamber 1. The filter paper transmission component includes a forward shaft 4 and a reverse shaft 5 that are both rotatably arranged inside the sealed air chamber 1. One end of the filter paper 6 is connected to the forward shaft 4, and the other end of the filter paper 6 is wound around the reverse shaft 5;

[0022] A photoelectric switch 7 is arranged below the filter paper 6. The photoelectric switch 7 is arranged close to the forward shaft 4. A tensiometer 8 is arranged on the lower side of the filter paper 6. The tensiometer 8 is arranged close to the reverse shaft 5;

[0023] One side of the sealed air chamber 1 is provided with a first driving motor for driving the rotation of the forward shaft 4 and a second driving motor for driving the rotation of the reverse shaft 5.

[0024] During actual use, by connecting one end of the filter paper 6 to the forward shaft 4 and winding the other end of the filter paper 6 around the reverse shaft 5, the rotation of the forward shaft 4 and the reverse shaft 5 can be controlled. Then, the unused filter paper on the reverse shaft 5 starts to be transmitted, and the filter paper 6 is wound around the forward shaft 4 after being used.

[0025] It should be noted that a photoelectric switch 7 is arranged below the filter paper 6, and a grille that cooperates with the photoelectric switch 7 is arranged below the filter paper 6.

[0026] During specific implementation, by arranging a tensiometer 8 on the lower side of the filter paper 6, the tension of the filter paper 6 can be detected by the tensiometer 8. Then, the reverse shaft 5 rotates adaptively according to the measured data, which can effectively solve problems such as paper jamming, filter paper breakage, and filter paper loosening that occur after the traditional filter paper box operates for a long time.

[0027] During specific implementation, an air pump is connected to the air extraction pipeline 3. The air pump pumps air to generate a negative pressure in the sealed air chamber 1. Then, the gas in the air inlet pipeline 2 is filtered by the filter paper and extracted by the air extraction pipeline 3.

[0028] During specific implementation, it further includes a controller. The photoelectric switch 7, the tensiometer 8, the first driving motor, and the second driving motor are all electrically connected to the controller. The data detected by the photoelectric switch 7 and the tensiometer 8 are transmitted to the controller. The controller controls the first driving motor and the second driving motor. The photoelectric switch 7 uses a photoelectric sensor with the model CPG-TF05N3T, and the tensiometer 8 uses a tensiometer with the model JZHL-L1.

[0029] During specific implementation, the forward shaft 4 is connected to the output shaft of the first driving motor through a coupling, and the reverse shaft 5 is connected to the output shaft of the second driving motor through a coupling.

[0030] In this embodiment, the intake air pipeline 2 is located directly above the exhaust air pipeline 3. The forward shaft 4 and the reverse shaft 5 are symmetrically arranged with respect to the central axis of the intake air pipeline 2, and the forward shaft 4 and the reverse shaft 5 are respectively located on both sides of the exhaust air pipeline 3.

[0031] During actual use, the forward shaft 4 and the reverse shaft 5 are parallel to each other and are arranged at the same height.

[0032] In this embodiment, the photoelectric switch 7 is located between the exhaust air pipeline 3 and the forward shaft 4, and the tensiometer 8 is located between the intake air pipeline 2 and the reverse shaft 5.

[0033] In this embodiment, a detector 9 is further provided in the sealed air cavity 1, and the detector 9 is located between the intake air pipeline 2 and the filter paper 6.

[0034] During actual use, gas enters the sealed air cavity 1 from the intake air pipeline 2, is filtered by the filter paper 6, and then is extracted from the exhaust air pipeline 3.

[0035] Specifically, the detector 9 is an ion-implanted silicon semiconductor detector.

[0036] In this embodiment, winding wheels 10 for winding the filter paper 6 are provided on both the forward shaft 4 and the reverse shaft 5. One end of the filter paper 6 is wound on the winding wheel 10 on the forward shaft 4, and the other end of the filter paper 6 is wound on the winding wheel 10 on the reverse shaft 5.

[0037] During actual use, the forward shaft 4 is driven by a first driving motor to start rotating at a constant speed set to update the filter paper 6. After the forward shaft 4 starts rotating, the photoelectric switch 7 starts working synchronously to count the value. The photoelectric switch 7 detects how much length the filter paper 6 has been updated, serving as a feedback device for the update of the filter paper 6. When the count value of the photoelectric switch 7 reaches the set count value, it indicates that the updated length of the filter paper 6 reaches the set requirement; then the update of the filter paper 6 is completed.

[0038] Meanwhile, in order to ensure that when the filter paper 6 is updated, the filter paper 6 will not break due to being too tight or fall off due to being too loose, the reverse shaft 5 is driven by a second driving motor to rotate, and the rotation speed of the reverse shaft 5 is flexibly adjusted. The adjustment target is to keep the tension of the filter paper 6 within a suitable range.

[0039] When the forward shaft 4 starts rotating, since the filter paper is tightened, the tension value detected by the tensiometer 8 starts to increase. At this time, an error is generated between the detected tension value and the target tension value. This error is transmitted to the controller to obtain a target speed value for the reverse shaft 5, and this speed value is used to control the current speed of the reverse shaft 5.

[0040] It should be noted that a well-known PID control algorithm can be used to process the error feedback between the detected tension value and the target tension value to obtain a target speed value for the reverse axis 5, and this speed value is used to control the current speed of the reverse axis 5. Thus, "tensiometer detection" + "tension value error calculation" + "PID calculation of the target speed of the reverse axis" + "reverse axis speed control" are repeatedly executed at regular intervals, so that the tension of the filter paper 6 is always maintained within an appropriate range. At this time, it is manifested that the reverse axis 5 rotates following the forward axis 4. When the filter paper update is completed and the forward axis 4 stops rotating, the reverse axis 5 will also stop rotating following it. Thus, the update of the filter paper 6 is completed.

[0041] The present utility model realizes the long-term stable operation of the filter paper box device by adding a reverse axis 5 and a tensiometer 8. When the filter paper 6 needs to be updated, the first driving motor is used to tighten the filter paper 6. The rotation of the forward axis 4 drives the filter paper 6 to tighten, while the reverse axis 5 winds the filter paper to be updated. As the forward axis 4 drives the filter paper 6, the filter paper 6 tightens and the output value of the tensiometer 8 becomes larger. The detected tensiometer error value is used as the input quantity for reverse axis speed control, and through automatic control adjustment, the reverse axis 5 automatically completes following the paper feeding while ensuring that the value of the tensiometer 8 always varies within a constant range. When the photoelectric switch 7 detects that the filter paper has completed an update of a sufficient length, the forward axis 4 is controlled to stop rotating, and at this time, the system has completed the filter paper update.

[0042] The above are only the preferred embodiments of the present utility model and do not impose any limitations on the present utility model. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A radioactive aerosol filter cartridge device, characterized in that: It includes a sealed air chamber (1), a filter paper (6) arranged in the sealed air chamber (1), a filter paper transmission assembly for driving the movement of the filter paper (6), an air inlet pipeline (2) arranged at the upper part of the sealed air chamber (1), and an air extraction pipeline (3) arranged at the lower part of the sealed air chamber (1). The filter paper transmission assembly includes a forward shaft (4) and a reverse shaft (5) both rotatably arranged inside the sealed air chamber (1). One end of the filter paper (6) is connected to the forward shaft (4), and the other end of the filter paper (6) is wound around the reverse shaft (5). An optoelectronic switch (7) is arranged below the filter paper (6), the optoelectronic switch (7) is arranged close to the forward shaft (4), a tensiometer (8) is arranged on the lower side of the filter paper (6), and the tensiometer (8) is arranged close to the reverse shaft (5). A first driving motor for driving the rotation of the forward shaft (4) and a second driving motor for driving the rotation of the reverse shaft (5) are arranged on one side of the sealed air chamber (1).

2. The radioactive aerosol filter cartridge device according to claim 1, wherein: The air inlet pipeline (2) is located directly above the air extraction pipeline (3). The forward shaft (4) and the reverse shaft (5) are symmetrically arranged with respect to the central axis of the air inlet pipeline (2), and the forward shaft (4) and the reverse shaft (5) are respectively located on both sides of the air extraction pipeline (3).

3. A radioactive aerosol filter cartridge device according to claim 2, characterized in that: The optoelectronic switch (7) is located between the air extraction pipeline (3) and the forward shaft (4), and the tensiometer (8) is located between the air inlet pipeline (2) and the reverse shaft (5).

4. A radioactive aerosol filter cartridge device according to claim 1, characterized in that: A detector (9) is further arranged in the sealed air chamber (1), and the detector (9) is located between the air inlet pipeline (2) and the filter paper (6).

5. The device for a radioactive aerosol filter paper box according to claim 1, characterized in that: Winding wheels (10) for winding the filter paper (6) are arranged on both the forward shaft (4) and the reverse shaft (5). One end of the filter paper (6) is wound around the winding wheel (10) on the forward shaft (4), and the other end of the filter paper (6) is wound around the winding wheel (10) on the reverse shaft (5).

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