Automatic screening device for americium-241 alpha radioactive source

Abstract

The utility model relates to the technical field of radioactive sources, and provides an americium-241 alpha radioactive source automatic screening device which comprises a feeding assembly, a conveying track, a screening assembly and a material receiving assembly. The feeding assembly comprises a feeding disc and a first vibrator for driving the feeding disc to vibrate, an outlet of the feeding disc is communicated with the receiving assembly through the transmission track, the feeding disc is used for placing the americium-241 alpha radioactive source, the first vibrator vibrates, and the americium-241 alpha radioactive source turns over and moves towards the outlet of the feeding disc; a recovery port is formed in the transmission track, the screening assembly is arranged close to the recovery port, and the screening assembly is used for detecting the americium-241 alpha radioactive source on the transmission track and moving the unqualified americium-241 alpha radioactive source to the recovery port to be recovered. The americium-241 alpha radioactive source screening device can screen the americium-241 alpha radioactive source without manual operation, and is low in cost, high in efficiency and high in safety.

Description

Technical Field

[0001] The utility model relates to the technical field of radioactive sources, in particular to an automatic screening device for americium-241α radioactive sources. Background Art

[0002] The core component of the ion type fire smoke alarm is the americium-241α radioactive source, which uses α particles to ionize the air, senses the changes in air composition when smoke passes through, and changes the voltage and current to achieve sensor alarm. Among them, the americium-241α radioactive source plays a vital role in the quality of the product.

[0003] Currently, for the automatically assembled and stamped americium-241α radioactive sources, unqualified products need to be manually selected. First, a certain number of produced radioactive sources are placed in a stainless steel tray, and the tray is slowly shaken so that as many radioactive source emission windows as possible face upward. Then, unqualified products are manually observed and selected. Finally, unqualified products are removed with tweezers. The above process is repeated continuously to select all unqualified products as much as possible. Manual screening has high cost, low efficiency, large error, and low safety. Utility Model Content

[0004] The utility model provides an automatic screening device for americium-241α radioactive sources, which is used to solve the problems of high cost, low efficiency, large error and low safety in the prior art of manual screening of americium-241α radioactive sources.

[0005] The utility model provides an automatic screening device for americium-241α radioactive sources, comprising: a loading component, a transmission track, a screening component and a receiving component; the loading component comprises a loading tray and a first vibrator for driving the loading tray to vibrate, the outlet of the loading tray is connected with the receiving component through the transmission track, the loading tray is used to place the americium-241α radioactive source, the first vibrator vibrates, the americium-241α radioactive source flips over and moves toward the outlet of the loading tray; a recovery port is provided on the transmission track, the screening component is arranged close to the recovery port, the screening component is used to detect the americium-241α radioactive source on the transmission track, and move the unqualified americium-241α radioactive source to the recovery port for recovery.

[0006] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, the screening component includes a color identifier, an air nozzle and a control valve, the color identifier and the air nozzle are respectively communicated with the control valve, and the air outlet of the air nozzle and the recovery port are arranged on both sides of the width direction of the transmission track opposite to each other; when the color identifier detects that the americium-241α radioactive source is an unqualified product, the control valve controls the air nozzle to spray an air flow toward the recovery port.

[0007] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, a receiving groove is provided on the loading tray, a spiral track is provided between the bottom of the receiving groove and the outlet of the loading tray, the receiving groove is used to store the americium-241α radioactive source, the first vibrator is a rotary vibrator, the first vibrator vibrates, the americium-241α radioactive source flips over and moves along the spiral track.

[0008] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, the transmission track includes a storage belt and a second vibrator that drives the storage belt to vibrate, and the second vibrator is a linear vibrator. When the second vibrator vibrates, the americium-241α radioactive source flips over and moves along the extension direction of the storage belt.

[0009] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, the material receiving assembly includes a material receiving tray and a cover plate, the cover plate is covered on the material receiving tray and is surrounded by the material receiving tray to form a accommodating space, the accommodating space has a material receiving port and a material discharging port that are relatively arranged, wherein the material receiving port is connected to the transmission track.

[0010] According to the automatic screening device for americium-241α radioactive sources provided by the utility model, the material receiving assembly further comprises a material baffle plate, which is arranged at the material outlet and is used to open or close the material outlet.

[0011] According to the automatic screening device for americium-241α radioactive sources provided by the utility model, the receiving tray and the cover plate are both made of lead glass material.

[0012] According to the automatic screening device for americium-241α radioactive sources provided by the utility model, the material receiving assembly further comprises a third vibrator, and the third vibrator is connected to the material receiving tray and is used to drive the material receiving tray to vibrate.

[0013] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, the automatic screening device for americium-241α radioactive sources also includes a vibration controller, and the first vibrator, the second vibrator and the third vibrator are respectively connected to the vibration controller, and the vibration controller is used to respectively control the vibration parameters of the first vibrator, the vibration parameters of the second vibrator and the vibration parameters of the third vibrator.

[0014] According to an automatic screening device for americium-241α radioactive sources provided by the utility model, the automatic screening device for americium-241α radioactive sources also includes a base, the loading assembly, the transmission track, the screening assembly, the receiving assembly and the vibration controller are all arranged on the base, and the base is also provided with a handle.

[0015] The utility model provides an automatic screening device for americium-241α radioactive sources. The americium-241α radioactive source on the loading plate is turned over by a first vibrator so that its emission window faces upward, and the americium-241α radioactive source is driven to move to a transmission track for transmission; the screening component detects the americium-241α radioactive source on the transmission track, and drives unqualified americium-241α radioactive sources to move to a recovery port for recovery, and qualified americium-241α radioactive sources are transmitted to a receiving component. The utility model embodiment can realize the screening of americium-241α radioactive sources without manual operation, with low cost, high efficiency and high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of an automatic screening device for americium-241α radioactive sources provided by the utility model;

[0018] Figure 2 It is a top view of the automatic screening device for americium-241α radioactive sources provided by the utility model;

[0019] Reference numerals:

[0020] 1. Loading tray; 2. Receiving slot; 3. Spiral track; 4. Transmission track; 5. Recovery port; 6. Recovery tray; 7. Color identifier; 8. Air nozzle; 9. Receiving tray; 10. Cover plate; 11. Baffle plate; 12. Vibration controller; 13. Base; 14. Handle. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0027] Combine the following Figure 1 to Figure 2The utility model describes an automatic screening device for americium-241α radioactive sources.

[0028] The automatic screening device for americium-241α radioactive sources provided by the embodiment of the utility model comprises: a loading assembly, a transmission track 4, a screening assembly and a receiving assembly. The loading assembly comprises a loading tray 1 and a first vibrator for driving the loading tray 1 to vibrate. The outlet of the loading tray 1 is connected to the receiving assembly through the transmission track 4. The loading tray 1 is used to place the americium-241α radioactive source. When the first vibrator vibrates, the americium-241α radioactive source flips over and moves toward the outlet of the loading tray 1. A recovery port 5 is provided on the transmission track 4. The screening assembly is arranged near the recovery port 5. The screening assembly is used to detect the americium-241α radioactive source on the transmission track 4 and move the unqualified americium-241α radioactive source to the recovery port 5 for recovery.

[0029] It should be noted that if the emission window of the americium-241α radioactive source is qualified, the americium-241α radioactive source is judged to be a qualified product, otherwise it is an unqualified product.

[0030] In the embodiment of the utility model, a plurality of americium-241α radiation sources are placed on the loading tray 1, and the first vibrator operates with target parameters to drive the loading tray 1 to vibrate, and the americium-241α radiation source flips over, so that the americium-241α radiation source emission window is placed upward on the loading tray 1, which is convenient for detecting whether the americium-241α radiation source emission window is qualified. At the same time, the first vibrator drives the plurality of americium-241α radiation source emission sources to move upward in the target direction, that is, to the exit of the loading tray 1, and enter the transmission track 4 for transmission. Compared with manual flipping, it is efficient and avoids manual radiation.

[0031] It can be understood that the vibration frequency of the first vibrator is set according to the structure of the americium-241α radiation source. When the first vibrator is started, the americium-241α radiation source can be flipped over so that the emission window faces upward, that is, the emission window of the americium-241α radiation source is located on the top surface, and the source support of the americium-241α radiation source contacts the loading tray 1; otherwise, it cannot be flipped over.

[0032] Furthermore, a recovery port 5 is provided on the transmission track 4, and the recovery port 5 is located on either side of the width direction of the transmission track 4, and a recovery tray 6 is provided at the recovery port 5. The screening component is arranged near the recovery port 5, and the screening device is used to detect whether the emission window of the americium-241α radioactive source on the transmission track 4 is qualified. If the americium-241α radioactive source is a qualified product, the americium-241α radioactive source is transmitted to the receiving component along the transmission track 4; if the americium-241α radioactive source is an unqualified product, the screening device drives the corresponding unqualified americium-241α radioactive source to move to the recovery port 5 and recover it to the recovery tray 6. Compared with manual detection of whether the americium-241α radioactive source is a qualified product, it is highly efficient and avoids artificial radiation. The screening component in the embodiment of the utility model can detect the americium-241α radioactive source by visual detection, such as judging by the color of the emission window of the americium-241α radioactive source. If all the target positions are gold, it is considered qualified, otherwise it is unqualified.

[0033] The automatic screening device for americium-241α radioactive sources provided by the embodiment of the utility model controls the americium-241α radioactive sources located on the loading plate 1 to flip over by a first vibrator, so that the emission window is upward, and drives the americium-241α radioactive sources to move to the transmission track 4 for transmission; the screening component detects the americium-241α radioactive sources on the transmission track 4, and drives unqualified americium-241α radioactive sources to move to the recovery port 5 for recovery, and the qualified americium-241α radioactive sources are transmitted to the receiving component. The embodiment of the utility model can realize the screening of americium-241α radioactive sources without manual operation, with low cost, high efficiency and high safety.

[0034] Furthermore, the screening component of the embodiment of the utility model includes a color identifier 7, an air nozzle 8 and a control valve. The color identifier 7 and the air nozzle 8 are respectively communicated with the control valve, and the air outlet of the air nozzle 8 and the recovery port 5 are arranged on both sides of the width direction of the transmission track 4; when the color identifier 7 detects that the americium-241α radioactive source is an unqualified product, the control valve controls the air nozzle 8 to spray an air flow toward the recovery port 5.

[0035] It should be noted that the americium-241α radioactive source consists of a source core and a radioactive source shell. The source core is made of gold as the surface layer and silver as the bottom lining, with a thin sheet of americium oxide raw material wrapped in the center. The radioactive source shell is made of stainless steel (hereinafter referred to as the source holder). The source core (gold side facing up, i.e. golden color) is placed flat in the groove of the source holder, and the source core is sealed and pressed in the groove with a punch, thereby fixing the source core to form an emission window. If the emission window is golden, it is qualified; if there are other colors (such as silver), it is unqualified.

[0036] Based on this, the embodiment of the utility model adopts the color identifier 7 to identify the color at the emission window of the americium-241α radiation source on the transmission track 4 to determine whether the americium-241α radiation source is a qualified product.

[0037] refer to Figure 2 , a recovery port 5 is provided on the first side of the width direction of the transmission track 4, and an air nozzle 8 is provided on the second side, and the air outlet of the air nozzle 8 is arranged opposite to the recovery port 5. The color identifier 7 is arranged between the recovery port 5 and the loading tray 1, and can also be arranged at the recovery port 5, for detecting whether the color of the emission window of the americium-241α radioactive source on the transmission track 4 is gold. If it is gold, the americium-241α radioactive source continues to be transmitted along the transmission track 4. If there are other colors, it is unqualified; at this time, the color identifier 7 sends a signal to the control valve, and when the americium-241α radioactive source moves to the recovery port 5, the control valve controls the air nozzle 8 to spray air toward the recovery port 5, and the americium-241α radioactive source is recovered to the recovery tray 6. In this way, the americium-241α radioactive source on the transmission track 4 is detected.

[0038] In addition, it should be noted that enclosures are provided on both sides of the width direction of the transmission track 4, and the height of the enclosures is set according to the height of the americium-241α radioactive source to prevent the americium-241α radioactive source on the transmission track 4 from falling during the transmission process.

[0039] The color identifier 7 in the embodiment of the utility model can use a mode optical fiber (OM4), supports high-density transmission, has a wavelength of 850 nanometers (infrared range), and a transmission rate of up to 100 Gbit / s, thereby ensuring high-precision measurement of americium-241α radiation sources.

[0040] The control valve may be an electromagnetic valve, such as a pilot electromagnetic valve, which has a fast response, high reliability and simple structure. When unqualified americium-241α radioactive source flows through, the electromagnetic valve reacts quickly, opens the air nozzle 8 to blow the unqualified americium-241α radioactive source from the recovery port 5 to the recovery tray 6, and the qualified americium-241α radioactive source continues to be transmitted along the transmission track 4 and flows into the receiving tray 9.

[0041] In the embodiment of the utility model, a loading tray 1 is provided with a receiving groove 2, and a spiral track 3 is provided between the bottom of the receiving groove 2 and the outlet of the loading tray 1. The receiving groove 2 is used to store the americium-241α radioactive source. The first vibrator is a rotary vibrator. When the first vibrator vibrates, the americium-241α radioactive source flips over and moves along the spiral track 3.

[0042] refer to Figure 1The outer periphery of the loading tray 1 is provided with a fence, the outlet of the loading tray is arranged on the fence, and a receiving groove 2 is provided in the center of the loading tray 1, and the receiving groove 2 is used to store the americium-241α radioactive source; a spiral track 3 is provided between the bottom of the receiving groove 2 and the outlet of the loading tray 1, and the first vibrator is a rotary vibrator and operates with target parameters. The americium-241α radioactive source in the receiving groove 2 enters the spiral track 3 at a target speed, and the americium-241α radioactive source flips during the movement along the spiral track 3, and the emission window of the americium-241α radioactive source faces upward, so that the emission window of the americium-241α radioactive source entering the transmission track 4 faces upward, which is helpful for screening components for detection, avoiding the detection of unflipped americium-241α radioactive sources, and reducing errors.

[0043] It should be noted that the loading tray 1 is made of metal parts and is processed and polished. The loading tray 1 has a high processing accuracy. According to the appearance and center distribution of the americium-241α radiation source holder, a spiral track 3 that meets the transmission of the americium-241α radiation source is designed and manufactured to ensure that when the americium-241α radiation source is transported to the transmission track 4 via the spiral track 3, the emission window of the americium-241α radiation source is facing upward.

[0044] The loading tray 1 in the embodiment of the utility model can be a round tray.

[0045] The transmission track 4 in the embodiment of the utility model includes a storage belt and a second vibrator for driving the storage belt to vibrate. The second vibrator is a linear vibrator. When the second vibrator vibrates, the americium-241α radiation source flips and moves along the extension direction of the storage belt.

[0046] The embodiment of the utility model sets the transmission track 4 as a vibration track, that is, the americium-241α radiation source is transmitted through vibration and can be turned over during the transmission process, thereby ensuring that the emission window of the americium-241α radiation source detected by the screening device is upward, thereby improving the detection accuracy.

[0047] When the transmission track 4 is a vibrating track, a baffle is provided at the recovery port 5, and the baffle can be rotated to open or close the recovery port 5 (the structure is not specifically limited here). When the air nozzle 8 sprays air flow toward the recovery port 5, the baffle opens to facilitate the recovery of the americium-241α radioactive source to the recovery disk 6; after the recovery is completed, the baffle can be rotated to the recovery port 5 manually or mechanically to prevent the americium-241α radioactive source from falling during the vibration process.

[0048] The transmission track 4 in the embodiment of the utility model can be made of metal material, and its width and depth respectively match the bottom and height of the americium-241α radiation source. The transmission track is polished smooth and flat with high processing accuracy, which avoids the americium-241α radiation source from getting stuck during the transmission process and improves the screening speed.

[0049] The material receiving assembly in the embodiment of the utility model includes a material receiving tray 9 and a cover plate 10, the cover plate 10 is covered on the material receiving tray 9, and is surrounded by the material receiving tray 9 to form a accommodating space, the accommodating space has a material receiving port and a material discharging port that are relatively arranged, wherein the material receiving port is connected to the transmission track 4, and the qualified americium-241α radioactive source enters the material receiving tray 9 through the material receiving port.

[0050] The receiving tray 9 of the utility model embodiment is made of lead glass material to avoid high temperature and static electricity generated by long-term friction, and reduce the radiation dose around, in order to avoid the scattering of the radiation source and reduce the radiation dose again. A lead glass cover plate 10 is added to the receiving tray 9, which is highly safe. The cover plate 10 can be set on the receiving tray 9 by magnetic suction.

[0051] Furthermore, the material receiving assembly also includes a material blocking plate 11, which is arranged at the material outlet and is used to open or close the material outlet to facilitate the removal of the americium-241α radioactive source.

[0052] In one embodiment, there is a gap between the end of the receiving tray 9 and the end of the cover plate 10 to form a snap-in groove, and the baffle plate 11 is snap-into the snap-in groove to reduce the surrounding radiation dose and provide high safety.

[0053] In another embodiment, the material blocking plate 11 is rotatably connected to the cover plate 10 to open or close the material outlet.

[0054] The material receiving assembly in the embodiment of the utility model further comprises a third vibrator, which is connected to the material receiving tray 9 and is used to drive the material receiving tray 9 to vibrate, so as to prevent the emission window of the americium-241α radioactive source entering the material receiving tray 9 from facing downward, so as to facilitate manual re-screening by the user and reduce the error rate.

[0055] The automatic screening device for americium-241α radioactive sources provided by the embodiment of the utility model further includes a vibration controller 12, and the first vibrator, the second vibrator and the third vibrator are respectively connected to the vibration controller 12, and the vibration controller 12 is used to control the vibration parameters of the first vibrator, the second vibrator and the third vibrator respectively. The vibration parameters include vibration frequency.

[0056] The automatic screening device for americium-241α radioactive sources provided by the embodiment of the utility model also includes a base 13, and a loading component, a transmission track 4, a screening component, a material receiving component and a vibration controller 12 are all arranged on the base 13, and a handle 14 is also provided on the base 13 to facilitate user movement.

[0057] In addition, it should be noted that the outlet of the loading tray 1 and the inlet of the transmission track 4 and the receiving tray 9 are all at the same height.

[0058] In the actual operation process, the americium-241α radioactive source can be placed in the receiving groove 2 in the loading tray 1, the cover plate 10 is covered on the receiving tray 9, and the baffle plate 11 is set at the discharge port to close the discharge port; the first vibrator, the color identifier 7 and the control valve are started, and the americium-241α radioactive source moves along the spiral track 3 to the transmission track 4 under the action of the first vibrator, and in this process, the americium-241α radioactive source flips, and the emission window is upward, which is helpful for the color identifier 7 to detect; when the color identifier 7 detects that the americium-241α radioactive source on the transmission track 4 is an unqualified product, the control valve controls the air nozzle 8 to spray air toward the recovery port 5, and the unqualified americium-241α radioactive source is recovered to the recovery tray 6; when the color identifier 7 detects that the americium-241α radioactive source is a qualified product, the transmission track 4 continues to transmit and move to the receiving tray 9. The embodiment of the utility model can realize screening without manual operation, with high efficiency and safety.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An automatic screening device for americium-241α radioactive sources, characterized in that: include: Feeding components, conveying tracks, screening components and receiving components; The loading assembly includes a loading tray and a first vibrator for driving the loading tray to vibrate. The outlet of the loading tray is connected to the receiving assembly through the transmission track. The loading tray is used to place the americium-241α radioactive source. When the first vibrator vibrates, the americium-241α radioactive source flips over and moves toward the outlet of the loading tray. A recovery port is provided on the transmission track, and the screening component is arranged close to the recovery port. The screening component is used to detect the americium-241α radioactive source on the transmission track and move the unqualified americium-241α radioactive source to the recovery port for recovery.

2. The automatic screening device for americium-241α radioactive sources according to claim 1, characterized in that: The screening component includes a color identifier, an air nozzle and a control valve, wherein the color identifier and the air nozzle are respectively connected to the control valve for communication, and the air outlet of the air nozzle and the recovery port are arranged on both sides of the width direction of the transmission track opposite to each other; When the color identifier detects that the americium-241α radioactive source is a substandard product, the control valve controls the air nozzle to spray air toward the recovery port.

3. The automatic screening device for americium-241α radioactive sources according to claim 1, characterized in that: The loading tray is provided with a receiving groove, and a spiral track is provided between the bottom of the receiving groove and the outlet of the loading tray. The receiving groove is used to store the americium-241α radioactive source. The first vibrator is a rotary vibrator. When the first vibrator vibrates, the americium-241α radioactive source flips over and moves along the spiral track.

4. The automatic screening device for americium-241α radioactive sources according to claim 1, characterized in that: The transport track includes a storage belt and a second vibrator for driving the storage belt to vibrate. The second vibrator is a linear vibrator. When the second vibrator vibrates, the americium-241α radiation source flips over and moves along the extension direction of the storage belt.

5. The automatic screening device for americium-241α radioactive sources according to claim 4, characterized in that: The material receiving assembly includes a material receiving tray and a cover plate, wherein the cover plate is covered on the material receiving tray and is arranged together with the material receiving tray to form a accommodating space, wherein the accommodating space has a material receiving port and a material discharging port which are arranged opposite to each other, wherein the material receiving port is connected to the transmission track.

6. The automatic screening device for americium-241α radioactive sources according to claim 5, characterized in that: The material receiving assembly also includes a material blocking plate, which is arranged at the material discharge port and is used to open or close the material discharge port.

7. The automatic screening device for americium-241α radioactive sources according to claim 5, characterized in that: The receiving tray and the cover plate are both made of lead glass material.

8. The automatic screening device for americium-241α radioactive sources according to any one of claims 5 to 7, characterized in that: The material receiving assembly further comprises a third vibrator, which is connected to the material receiving tray and is used to drive the material receiving tray to vibrate.

9. The automatic screening device for americium-241α radioactive sources according to claim 8, characterized in that: The automatic screening device for americium-241α radiation sources also includes a vibration controller, and the first vibrator, the second vibrator and the third vibrator are respectively connected to the vibration controller, and the vibration controller is used to control the vibration parameters of the first vibrator, the vibration parameters of the second vibrator and the vibration parameters of the third vibrator respectively.

10. The automatic screening device for americium-241α radioactive sources according to claim 9, characterized in that: The automatic screening device for americium-241α radioactive sources also includes a base, and the loading assembly, the transmission track, the screening assembly, the receiving assembly and the vibration controller are all arranged on the base, and the base is also provided with a handle.

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