CN216310286U

CN216310286U - Radiation detection door

Info

Publication number: CN216310286U
Application number: CN202122822090.0U
Authority: CN
Inventors: 王强; 黄清臻; 路伟; 章雷; 赵增明; 王莉莉; 郭雪琪; 王启光
Original assignee: Nuclover Technology Co ltd; Chinese Pla Center For Disease Control & Prevention
Current assignee: Nuclover Technology Co ltd; Chinese Pla Center For Disease Control & Prevention
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-15
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to a radiation detection door, which comprises a pedal, a supporting unit and a radiation detection unit; the pedal is laid on the inner bottom surface of the supporting unit; the two opposite sides of the supporting unit are of opening structures and can rotate along the circumferential direction of the pedal; the radiation detection unit is fixed on the supporting unit and can rotate along with the supporting unit. The radiation detection unit is fixed on the supporting unit and can rotate along with the supporting unit so as to carry out 360-degree all-dimensional scanning detection on people standing on the pedal. Compared with the mode of manually holding the detection instrument for detection, the detection instrument can quickly complete the omnibearing detection task, thereby greatly improving the detection efficiency and the detection effect. Because the protective clothing is not needed and the person to be detected wearing the carrying bag rotates, the possibility that the person to be detected falls down is greatly reduced, and the safety of the detection process is effectively improved. In addition, because manual detection is not needed, the risk of cross contamination is reduced.

Description

Radiation detection door

Technical Field

The utility model relates to the technical field of radiation detection equipment, in particular to a radiation detection door.

Background

With the development of modern science and technology, people make major breakthroughs in the fields of nuclear energy, biology and chemical industry. The nuclear biochemistry brings potential risks to human survival while benefiting the human. In particular, the non-positive effects of nuclear biochemistry internationally in recent years have presented serious challenges to the fire department in their duty preparation. The firefighters need to perform radiation detection after completing related tasks. Known radiation originates mainly from alpha particles, beta particles, gamma particles, neutron materials, uranium materials, plutonium materials and many other hazardous substances. Among them, α -particles and β -particles are weak in radioactivity and require close-range detection. The manual handheld detector is often needed to detect the person to be detected.

At present, the detection of the radiation object of the personnel to be detected is completed manually, and the detection efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a radiation detection door, which aims to solve the problems that the detection of a radiation object of a person to be detected is finished manually and the detection efficiency is low.

The radiation detection door comprises a pedal, a supporting unit, a top radiation detector, a side radiation detector and a bottom radiation detector;

the pedal is laid on the inner bottom surface of the supporting unit;

the two opposite sides of the supporting unit are of opening structures and can rotate around the axis of the pedal;

the top radiation detector is one and is fixed in the middle of the top of the supporting unit;

the plurality of side radiation detectors are fixed on the same side of the supporting unit and are uniformly distributed in the vertical direction;

the two bottom radiation detectors are fixed on the bottom surface of the supporting unit, and a preset distance is reserved between the adjacent sides;

the top radiation detector, the side radiation detector and the bottom radiation detector can rotate along with the supporting unit.

In one particular embodiment, each side radiation detector includes a detection module;

the detection module is a plastic scintillator detector;

the top radiation detector and the bottom radiation detector have the same structure as the side radiation detector.

In one embodiment, the support unit includes a turntable and a door frame;

the turntable is laid below the bottom surface of the pedal;

the door frame is arranged right above the pedal and comprises a stand column and a cross beam;

the two upright posts are both vertically arranged and are of hollow structures, and the bottom ends of the upright posts are respectively fixedly connected with the two opposite sides of the turntable;

the number of the cross beam is one, and two ends of the cross beam are respectively fixedly connected with the top ends of the two stand columns through butt-joint elbows; the cross beam is of a long-strip hollow structure;

the top radiation detector is fixed in the middle of the inside of the cross beam;

the plurality of side radiation detectors are all fixed inside one of the upright columns;

the two bottom radiation detectors are fixed on the bottom surface of the turntable.

In one specific embodiment, the system further comprises an infrared sensor;

the two infrared sensors are respectively fixed on the upper part and the lower part of the inner side of the other upright post.

In one embodiment, the intermediate portions of the two posts project away from each other such that the intermediate portions are spaced further apart than the upper and lower portions.

In one of the specific embodiments, the axis of the cross beam is adjustable in the vertical direction;

the minimum distance between the two upright posts can be adjusted.

In one specific embodiment, the coating further comprises a protective film;

the protective film is attached to the inner side surface of the upright post fixed with the side radiation detector.

In one specific embodiment, the device further comprises a base, a driving motor and a control host;

the base is of a hollow structure;

the driving motor is fixed inside the base and is fixedly connected with the outer bottom surface of the supporting unit;

the control host is fixed on the outer side of the supporting unit and is electrically connected with the driving motor;

the pedal is fixedly connected with the driving motor.

In one embodiment, the driving motor is an outer rotor motor, the top end of the inner stator is fixedly connected with the bottom surface of the pedal, the bottom end of the inner stator is fixedly connected with the inner bottom surface of the base, and the outer rotor is fixedly connected with the outer bottom surface of the supporting unit.

The utility model has the beneficial effects that: the radiation detection door is provided with the pedal, and the pedal can be used for a person to be detected to stand. The supporting unit can effectively support and fix the radiation detection unit. The opposite two sides of the supporting unit are both of an opening structure, so that people can conveniently enter the interior of the detection door and stand on the pedal. The pedal is of a circular structure, and the supporting unit can rotate 360 degrees along the circumferential direction of the pedal. The radiation detection unit is fixed on the supporting unit and can rotate along with the supporting unit so as to carry out 360-degree all-dimensional scanning detection on people standing on the pedal. Compared with the mode of manually holding the detection instrument for detection, the detection instrument can quickly complete the omnibearing detection task, thereby greatly improving the detection efficiency and the detection effect. Because the protective clothing is not needed and the person to be detected wearing the carrying bag rotates, the possibility that the person to be detected falls down is greatly reduced, and the safety of the detection process is effectively improved. In addition, because manual detection is not needed, the risk of cross contamination is reduced.

Drawings

FIG. 1 is a front view of one embodiment of a radiation detection door of the present invention;

FIG. 2 is a cross-sectional view A-A of the radiation detection door shown in FIG. 1;

fig. 3 is a top view of the radiation detection door shown in fig. 1;

fig. 4 is a schematic structural diagram of a supporting unit in another embodiment of the radiation detection door of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention or for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "secured," "engaged," "hinged," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, 2 and 3, a radiation detecting door includes a pedal 110, a supporting unit 120 and a radiation detecting unit. The pedal 110 is laid on the inner bottom surface of the support unit 120. The opposite sides of the supporting unit 120 are open structures, and can rotate along the circumferential direction of the pedal 110. The radiation detection unit is fixed to the support unit 120 and can rotate with the support unit 120.

In this embodiment, the step plate 110 laid on the inner bottom surface of the supporting unit 120 can be used by a person standing. The support unit 120 can effectively support and fix the radiation detection unit. Wherein, the interval between the two opposite sides of the supporting unit 120 is 255mm, and both are open structures, so that people can enter the interior of the detection door and stand on the pedal 110. The pedal 110 has a circular structure, and the support unit 120 can rotate 360 degrees in a circumferential direction of the pedal 110. The radiation detection unit is fixed on the supporting unit 120 and can rotate along with the supporting unit 120, so as to perform 360-degree omni-directional scanning detection on a person standing on the pedal 110. Compared with the mode of manually holding the detection instrument for detection, the detection instrument can quickly complete the omnibearing detection task, thereby greatly improving the detection efficiency and the detection effect. Because the protective clothing is not needed and the person to be detected wearing the carrying bag rotates, the possibility that the person to be detected falls down is greatly reduced, and the safety of the detection process is effectively improved. In addition, because manual detection is not needed, the risk of cross contamination is reduced.

In an embodiment of the present invention, the radiation detection unit comprises a top radiation detector 131, a side radiation detector 132 and a bottom radiation detector 133. The top radiation detector 131 is fixed to the middle of the top of the supporting unit 120, and can detect the top of the head of the person to be detected. The side radiation detectors 132 are fixed to the same side of the supporting unit 120 and are uniformly distributed in the vertical direction. Each of the side radiation detectors 132 is rotatable with the support unit 120 about the axis of the pedal 110. The side radiation detectors 132 cooperate with each other to detect the side of the person to be detected by 360 degrees. Two bottom radiation detectors 133 are fixed to the bottom surface of the support unit 120. The two bottom radiation units are matched with each other, and the two bottoms of the two feet of the person to be detected can be detected. On the whole, top radiation detector 131, side radiation detector 132 and end radiation detector 133 cooperate each other and can accomplish all-round multi-angle detection task fast, have ensured detection efficiency, have improved the detection effect. Moreover, a preset distance is left between the adjacent sides of the two bottom radiation detectors 133, specifically, the preset distance is 20-50cm, so that the device adapts to the straddling posture of the person to be detected, and the detection safety is improved.

In one embodiment of the present invention, each side radiation detector 132 includes a detection module that is a plastic scintillator detector. The top radiation detector 131 and the bottom radiation detector 133 have the same structure as the side radiation detector 132. The plastic scintillator detector can be used for detecting alpha, beta, gamma, fast neutrons, protons, cosmic rays, fission fragments and the like. The plastic scintillator detector is easy to process and form, does not generate deliquescence, has high performance stability, short scintillation attenuation time and low price. The detection efficiency is further improved, the detection effect is guaranteed, and the manufacturing cost of the detection door is effectively reduced. The plastic scintillator detector is a thick plastic scintillator, and particularly, the size of a detection surface of the thick plastic scintillator is 100mm multiplied by 230mm, so that the plastic scintillator detector is suitable for the situation that on-site nuclides are relatively fixed.

In another embodiment of the present invention, each side radiation detector 132 includes a detection module, a distance sensor, and a servo motor. Wherein, the detection module is respectively and fixedly connected with the output shaft of the distance sensor and the servo motor. The distance sensor can acquire distance information. According to the distance information, the servo motor can drive the distance sensor and the detection module to move towards the human body, so that the distance between the detection module and the human body is continuously adjusted in the whole detection process. The plastic scintillator detector is a thin plastic scintillator, the surface of the plastic scintillator detector is of a hollow structure, and the transmittance of the hollow area is greater than 75%. Therefore, the plastic scintillator detector has a good detection effect, can prevent the detector from being damaged, and effectively prolongs the service life of the plastic scintillator detector. Here, the optimal measurement distance of the thin plastic scintillator is 5mm to 10mm, which is suitable for a case where the species of nuclear species is relatively non-fixed.

In an embodiment of the present invention, the supporting unit 120 includes a turntable 121 and a door frame 122. The supporting unit 120 is in a form of matching the rotating disc 121 and the door frame 122, so that the overall weight of the supporting unit 120 is light, the stability of the rotation of the supporting unit 120 is favorably controlled, and the detection efficiency is effectively improved. It is noted that the disks 121 are all 800mm in diameter. The rotary disc 121 rotates around its axis to drive the door frame 122 to rotate along the circumferential direction of the pedal 110, and further drive the shower head radiation detection unit to rotate, thereby better completing the radiation detection task. Specifically, the turntable 121 is laid under the bottom surface of the pedal 110, and the door frame 122 is laid over the pedal 110, and includes a pillar and a beam. Wherein, the stand is two, and equal vertical setting, and is hollow structure, bottom respectively with carousel 121's relative both sides fixed connection. The distance between the inner side surfaces of the two upright posts is greater than 800-900 mm. The crossbeam is one, and both ends are respectively through the top fixed connection of butt joint elbow and two stands. The crossbeam is rectangular hollow structure. The distance between the bottom surface of the beam and the top surface of the pedal 110 is 2000-2500 mm. Door frame 122 adopts the modular design on the whole, easily assembles use and long-distance transport. The top radiation detector 131 is fixed to the middle of the inside of the beam by a fixing bracket. The cross beam can protect the top radiation detector 131 and prolong the service life of the top radiation detector 131. A plurality of side radiation detectors 132 are each secured to the interior of one of the columns by a mounting bracket. The pillars can protect the side radiation detectors 132, and prolong the service life of the side radiation detectors 132. Moreover, each adjacent two of the side radiation detectors 132 are closely attached. Therefore, the detection effect of the side body of the person to be detected is guaranteed. Both bottom radiation detectors 133 are fixed to the bottom surface of the turntable 121 by fixing brackets. The turntable 121 can protect the bottom radiation detector 133 and prolong the service life of the bottom radiation detector 133. Overall, rationally distributed, can accomplish all-round multi-angle task fast, improve the detectivity greatly and efficiency to the detectivity effect has been improved effectively.

In one embodiment of the present invention, the radiation detection door further includes an infrared sensor 140. Two infrared sensors 140 are fixed to the upper and lower portions of the inner side of the other pillar, respectively. It should be noted that, the distance between the infrared sensor 140 fixed on the upper portion of the pillar and the top surface of the pedal 110 is 760 and 762mm, so that the upper portion of the human body can be detected. The distance between the infrared sensor 140 fixed to the lower portion of the outer column and the top surface of the pedal 110 is 349 and 351mm, and the lower portion of the human body can be detected. The two infrared sensors 140 cooperate to detect the body posture of a firefighter standing on the pedals to assist in better performing the radiation detection task.

Referring to fig. 4, in another embodiment of the present invention, the middle portions of the two posts are raised away from each other such that the distance between the middle portions is greater than the distance between the upper and lower portions. Therefore, the whole door frame 122 is matched with the human engineering structure, and the radiation detection effect is effectively improved.

In a particular embodiment of the utility model, the axis of the cross beam is adjustable in the vertical direction and the minimum distance between the two uprights is adjustable. Each stand all includes a plurality of first linkage segments, and a plurality of first linkage segments are along the axial evenly distributed of stand. The adjacent ends of two adjacent first connecting sections are connected in a sleeving connection mode. So for the axis length of stand is adjustable, and then makes the axis of crossbeam adjustable in vertical direction. The crossbeam includes the second linkage segment, and the second linkage segment is a plurality of, along the axial evenly distributed of crossbeam. And the adjacent ends of the two adjacent second connecting sections are connected in a sleeving manner. The turntable 121 includes a left connecting portion, a middle connecting portion, and a right connecting portion, the right end of the left connecting portion can be embedded in the inside of the left end of the middle connecting portion, and the left end of the right connecting portion can be embedded in the inside of the right end of the middle connecting portion. So for the axis length of crossbeam and the size of carousel 121 are adjustable, and then make the minimum distance of two stands adjustable, with the personnel of waiting to detect who is applicable to different heights and different sizes. On the whole, the radiation detection unit can be close to the personnel to be detected to the maximum extent, the possibility of missing detection of particles with weak radioactivity, such as alpha particles, beta particles and the like, is reduced, the detection rate is improved, and the detection effect is improved. It should be noted that the continuous adjustment of the positions of the cross beam and the upright post can be accomplished by means of a servo motor.

In an embodiment of the present invention, the radiation detection door further includes a protective film, and the protective film is attached to the inner side surface of the pillar on which the side radiation detector 132 is fixed. Specifically, the protective film is a disposable film, and the protective film can be replaced once every detection is completed. In this way, the possibility of cross-contamination is reduced. Specifically, the radiation detection door further includes a protective film release mechanism 150. The protective film releasing mechanism 150 comprises a mounting frame and a rotating roller, wherein the top of the mounting frame is fixed on the bottom surface of the cross beam, the bottom of the mounting frame is rotatably connected with the rotating roller, and the protective film is wound on the rotating roller. The protective film on the rotating roller is released by manual force and temporarily stuck on the inner side face of the pillar to which the side radiation detector 132 is fixed. So, the change of the pellicle of being convenient for is taken.

In an embodiment of the present invention, the radiation detection door further includes a base 160, a driving motor 170, a control host 180, and an audible and visual alarm. The base 160 is a hollow structure, so that the driving motor 170 can be protected, the service life of the driving motor 170 is prolonged, and the operation safety is improved. The driving motor 170 is fixed inside the base 160 and is fixedly connected to the outer bottom surface of the supporting unit 120. It should be noted that a relief hole is formed in the middle of the top of the base 160, so that the driving motor 170 can be fixedly connected to the middle of the bottom of the turntable 121 of the supporting unit 120. The control main unit 180 is fixed to an outer side of the supporting unit 120 and electrically connected to the driving motor 170 through a motor controller. The control host 180 is also electrically connected to an external power source, a distance sensor, a detection module, a servo motor for driving the detection module to move, the infrared sensor 140, and an audible and visual alarm. The control host 180 is powered by an external power source. The distance sensor can transmit the acquired distance information to the control host 180. The detection module can transmit the acquired radiation amount to the control host 180. The control host 180 controls whether the driving motor 170 and the servo motor operate or not through the motor controller. The infrared sensor 140 can transmit the collected signal to the control host 180. The control host 180 can control whether the audible and visual alarm gives an alarm or not. The pedal 110 is fixedly connected to the driving motor 170. Specifically, the driving motor 170 is an outer rotor motor, and it should be noted that the inner stator of the outer rotor motor does not rotate, and the outer rotor rotates. The top end of the inner stator of the outer rotor motor is fixedly connected to the bottom surface of the pedal 110, the bottom end of the inner stator is fixedly connected to the inner bottom surface of the base 160, and the outer rotor is fixedly connected to the outer bottom surface of the supporting unit 120. Thus, the position of the pedal 110 is always kept constant, and the inner bottom surface of the base 160 can support the pedal 110 well. It should be noted that the pedal 110 is located right above the turntable 121, and the size of the pedal is slightly smaller than the turntable 121, so that the pedal 110 does not contact with the upright. The outer rotor of the outer rotor motor is fixedly connected to the bottom of the turntable 121 of the supporting unit 120, so that the outer rotor can drive the turntable 121, the door frame 122 and the radiation detection unit to rotate. On the whole, simple structure, weight is lighter, and the radiation detection door of being convenient for carries out the position and shifts. The logic program for receiving the signals of the infrared sensor 140, the distance sensor and the detection module and controlling the servo motor and the driving motor 170 to work by the control host 180 is the prior art and will not be described herein.

In an embodiment of the present invention, the outer rotor of the outer rotor motor is connected to the turntable 121 by a screw connection, the middle of the turntable 121 is provided with a step-down hole, and the inner stator of the outer rotor motor passes through the step-down hole formed at the top of the base 160 and the step-down hole formed at the middle of the turntable 121 and then is connected to the pedal 110 by a screw connection. The upright post of the door frame 122 is connected with the rotating disc 121 in a threaded manner. On the whole, the radiation detection door realizes the modularized design, reduces the manufacturing difficulty and effectively improves the manufacturing efficiency of the radiation detection door. Meanwhile, the radiation detection door is convenient to assemble, use, disassemble and transport.

After the measurement is started, the rotating disc drives the door frame 122 to rotate at a constant speed along a preset direction, each detection module calculates the surface radiation quantity of the human body to be measured in real time according to the distance information measured by the distance sensor, the measured data are transmitted to the control host computer 180 in real time and displayed on the control host computer 180 in real time, and after the set threshold value is exceeded, the audible and visual alarm gives an alarm to remind field personnel to process in time.

The specific working process of the radiation detection door comprises the following steps: and starting the device, and after the person to be detected enters the supporting unit 120, judging whether the person to be detected enters through the infrared sensor 140 and judging whether the standing posture of the person to be detected is correct. Then, the measurement program is started, and the control host 180 controls the driving motor 170 to operate, so as to drive the turntable 121, the door frame 122, the top radiation detector 131, the side radiation detector 132, and the bottom radiation detector 133 to rotate at a constant speed and in a preset direction. After rotating 360 degrees, the rotation is stopped. Here, the drive motor 170 may be configured to rotate in the forward direction or the reverse direction. If the measurement result shows that the person to be detected does not emit dangerous radiation, the person to be detected may leave the support unit 120. At this time, the radiation detection gate enters a state to be measured. If the measured value of a certain part of the person to be measured in the rotating process is larger than a preset threshold value, the control host 180 controls the audible and visual alarm to give out a prompt and displays a corresponding position so as to remind field personnel to process in time and prevent further pollution diffusion. And replacing the protective film once after each measurement period to facilitate cross contamination. It should be noted that, if the turntable 121 completes 360 degrees forward rotation in the previous measurement period, the turntable 121 should complete 360 degrees reverse rotation in the next measurement period. In this way, the rotation directions alternate.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," "one specific embodiment," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solution and the concept of the present invention are equivalent to or changed within the scope of the present invention.

Claims

1. A radiation detection door, comprising:

the device comprises a pedal, a supporting unit, a top radiation detector, a side radiation detector and a bottom radiation detector;

the pedal is laid on the inner bottom surface of the supporting unit;

the top radiation detector is fixed in the middle of the top of the supporting unit;

2. The radiation detection door of claim 1, wherein each of the side radiation detectors includes a detection module;

the detection module is a plastic scintillator detector;

the top radiation detector and the bottom radiation detector are both the same in structure as the side radiation detector.

3. The radiation detection door of claim 1, wherein the support unit includes a turntable and a door frame;

the turntable is laid below the bottom surface of the pedal;

the two upright posts are vertically arranged and are of hollow structures, and the bottom ends of the upright posts are fixedly connected with the two opposite sides of the rotary table respectively;

the top radiation detector is fixed in the middle of the inner part of the cross beam;

a plurality of side radiation detectors are fixed inside one of the upright columns;

4. The radiation detection door of claim 3, further comprising an infrared sensor;

5. The radiation detection door of claim 3, wherein the central portions of the two posts project away from each other such that the distance between the central portions is greater than the distance between the upper and lower portions.

6. The radiation detection door of claim 3, wherein an axis of the cross beam is adjustable in a vertical direction;

the minimum distance between the two upright posts can be adjusted.

7. The radiation detection door of claim 3, further comprising a protective film;

the protective film is attached to the inner side face of the upright post fixed with the side radiation detector.

8. The radiation detection door of any one of claims 1 to 7, further comprising a base, a drive motor and a control host;

the base is of a hollow structure;

the pedal is fixedly connected with the driving motor.

9. The radiation detection door of claim 8, wherein the driving motor is an outer rotor motor, a top end of the inner stator is fixedly connected to a bottom surface of the pedal, a bottom end of the inner stator is fixedly connected to an inner bottom surface of the base, and an outer rotor is fixedly connected to an outer bottom surface of the supporting unit.