KR20170135631A - Radiation safety equipment and inspection equipment - Google Patents

Abstract

The present invention relates to a radiation irradiation apparatus and a safety inspection apparatus. The radiation irradiation apparatus includes a radiation source for providing radiation, a chamber for receiving the radiation source, and an operating part which is connected to the chamber. The radiation source includes a shielding housing which discharges the radiation to the outside through the opening part and a moving mechanism which moves the radiation source at a first position to discharge the radiation to the outside through the opening part by being aligned in the opening part and a second position to prevent the radiation from being discharged to the outside through the opening part by being separated from the opening part, with regard to the shielding housing. Therefore, a shutter opening and closing speed of the radiation irradiation apparatus is improved.

Description

{Radiation safety equipment and inspection equipment}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nuclear technology application field, and more particularly to a radiation irradiation apparatus and a safety inspection apparatus.

Radiation safety inspection instruments are widely used in terminals, subways, airports, customs, ports, nuclear power plants, government agencies, postal inspection centers, courts and meeting places. Radiation is transmitted through objects to be inspected, And obtains the attenuated intensity after the radiation has passed through the different object, thereby discriminating the density of the inspection object and proceeding to the safety inspection of the object or the vehicle by obtaining a different gray scale image.

Dual-projection radiography inspection technology for large trucks and containers is known, and isotopes are used as sources of radiation. Generally, the radiation source is disposed in a thick shielded room, and a radiation hole is opened in the shielded room to block or expose the radiation hole through a reciprocating movement of a shutter having a shielding function, Exit from the discharge hole to inspect the inspected object. However, such a shutter structure is too heavy to open and close the shutter, and the impact force is too large to meet the inspection requirements.

Therefore, there is a need for a radiation irradiation apparatus and a safety inspection apparatus having a shutter opening / closing speed and a small impact force.

According to an aspect of the present invention, there is provided a radiation source comprising: a radiation source providing radiation; a chamber accommodating the radiation source; and an opening communicating with the chamber. A shielding housing for allowing the radiation source to emit radiation to the outside through the opening; a first position in which the radiation source is aligned with the opening with respect to the shielding housing so that the radiation is emitted to the outside through the opening; And a moving mechanism which moves in a second position which is separated from the opening and prevents the radiation from being emitted to the outside through the opening.

The radiation irradiation apparatus of the present invention is characterized in that the radiation source can be shifted between the first position and the second position to align the radiation source with the opening so as to realize the radiation to the outside or to separate the radiation source from the opening, Stop. Since the weight of the radiation source is much smaller than the weight of the shielding housing, a fast shutter opening / closing speed can be realized and the impact force against the shielding housing can be reduced.

According to one aspect of the present invention, the radiation source is an isotopic radiation source.

According to one aspect of the present invention, the isotope radiation source is any one of ⁶⁰ Co, ¹³⁷ Cs, ¹⁹² Ir, and ⁷⁵ Se.

According to one aspect of the present invention, the moving mechanism is connected to the radiation source so that the radiation source is reciprocated linearly.

According to one aspect of the present invention, the moving mechanism includes a driving cylinder, a hydraulic cylinder, an electric putter or an electromagnet which drives the radiation source in a linear reciprocating motion.

According to one aspect of the present invention, the moving mechanism is connected to the radiation source to cause the radiation source to rotate.

According to one aspect of the present invention, the moving mechanism includes a rotating member, and the radiation source is provided so as to be eccentric with respect to the rotational axis of the rotating member.

According to one aspect of the present invention, the shielding housing further includes a movable portion capable of closing the opening portion.

According to one aspect of the present invention, the opening is slot-shaped, such that radiation emitted through the opening forms a scan surface.

According to another aspect of the present invention, there is provided a safety inspection apparatus including any one of the above radiation irradiation apparatuses.

BRIEF DESCRIPTION OF THE DRAWINGS The features, advantages, and technical advantages of an exemplary embodiment of the present invention are described below with reference to the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic front view of a radiation irradiation apparatus according to an embodiment of the present invention; FIG.
Fig. 2 is a schematic plan view of the irradiation apparatus of Fig. 1;
3 is a schematic cross-sectional view of the irradiation device of FIG. 2 along the AA direction.
4 is a schematic front view of another irradiation apparatus according to an embodiment of the present invention.
Fig. 5 is a schematic structural view of the left side of the irradiation device of Fig. 4; Fig.
6 is a schematic front view of another irradiation apparatus according to an embodiment of the present invention.
Fig. 7 is a schematic plan view of the irradiation apparatus of Fig. 6;
Fig. 8 schematically shows a sectional structure along the BB direction of the radiation irradiation apparatus of Fig. 7; Fig.

Hereinafter, features and exemplary embodiments of the present invention will be described in detail. In the following detailed description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the present invention is intended to be illustrative, but not to limit the scope of the present invention. The present invention is not intended to be limited to the particular arrangements shown below and covers any modifications, alternatives, and improvements to the structure and elements of the present invention, without departing from the spirit of the invention. In order to avoid unnecessary confusion in understanding the description of the present invention, well-known structures and techniques are not shown in the drawings and the following description.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic front view of a radiation irradiation apparatus according to an embodiment of the present invention; FIG. The irradiation apparatus is mounted in an inspection passage of various types of safety inspection apparatuses (not shown), and emits inspection radiation to the inspection object (for example, a vehicle or a container, for example) Inspection objects can be inspected in coordination with deployed detectors and other units.

A schematic plan view of the irradiation apparatus of Fig. 1 shown in Fig. 2, and a schematic view of a sectional structure along the A-A direction of the irradiation apparatus of Fig. 2 shown in Fig. The radiation irradiation apparatus includes a shielding housing 10 and a radiation source 20 installed in a chamber inside the shielding housing 10. The shielding housing 10 includes an opening 11 communicating with the chamber, Which form the scan surface. The radiation irradiating device is configured such that the radiation source 20 moves relative to the opening 11 through a moving mechanism so that the radiation source 20 is aligned with the opening 11 or the radiation source 20 is released from the opening 11 , And is configured to implement opening and closing of the shutter of the irradiation apparatus (that is, emitting inspection radiation to the outside or stopping emission of the inspection radiation).

According to an embodiment of the present invention, specifically, the shielding housing 10 is made of a material having a shielding performance and has a good shielding effect and a high strength. For example, lead, tungsten, lead alloys or tungsten alloys, uranium 238, or other high-density metals or alloys. The main body of the shielding housing 10 has an elliptical hole structure and can be mounted on a mount stand of the irradiation apparatus of the inspection passage. The main body of the shielding housing 10 includes a chamber accommodating the radiation source 20 therein, The opening 11 can be opened by selecting a circular hole or a slit-shaped opening according to an actual irradiation request. Illustratively, as shown in FIG. 1 or FIG. 2, the opening 11 may be directly open to the body of the shielding housing 10. The position of the opening 11 can be determined by the position of the radiation source 20 in the chamber if it satisfies a first position in which the radiation source 20 is aligned with the opening 11 or a second position in which it leaves the opening 11 Of course.

Since the opening 11 of the embodiment of the present invention is formed in the elliptical hole structure, when the opening 11 is slot-shaped, the opening angle in the shielding housing 10 can be maximized. Therefore, it is possible to ensure a good shielding effect of the irradiation apparatus and to have a large opening angle, that is, a wide radiation area. Therefore, as close as possible to the inspection object, it is possible to reduce the space occupied by the inspection apparatus. In some embodiments, when the opening 11 is slot-shaped, the opening 11 may be a collimator of the irradiation apparatus that draws the inspection radiation and limits the shape and size of the inspection radiation, since the shielding housing itself has a sufficient thickness So that radiation emitted from the radiation source 20 can be repeatedly irradiated with the inspected object, or alternatively, irradiated by the radiation source 20, by collimating the radiation source 20 into a large volumetric region, It is possible not only to avoid the unexamined inspection and to eliminate the dead zone but also to ensure that the inspection radiation is strictly aligned with the corresponding detector so that the inspection efficiency and the quality of the displayed inspection image are improved, Can be inspected.

The shielding housing 10 can prevent radiation emitted from the chamber from leaking through other portions than the opening 11, thereby providing a good shielded space in the chamber and preventing radiation leakage. Of course, the structure of the shielding housing 10 described above is not limited thereto. In this embodiment, the shielding housing 10 having an ellipsoidal shape is used to ensure a uniform thickness distribution and ease of mounting. However, In the example, it may be a cube, a cylinder, or other case structure. It is only necessary to satisfy the thickness required for shielding.

According to the embodiment of the present invention, the radiation source 20 is mounted in the chamber through the mounting portion, so that the chamber inside the shielding housing 10 is correspondingly installed according to the shape of the radiation source 20 mounting portion. A first position and a second position are formed depending on the mutual arrangement state of the radiation source 20 and the opening 11. [ The movement mechanism allows the source (20) to move between the first position and the second position with respect to the opening (11).

Of course, the present invention is not limited to the type of radiation source 20, and according to an embodiment of the present invention, the radiation source 20 may be, for example, an X-ray source or a? -Ray source. Including those of, X seonwonneun X-ray device and the electron accelerator and, γ seonwonneun comprises an isotope radiation source, may include specifically, ⁶⁰ Co, ¹³⁷ Cs, ¹⁹² Ir, ⁷⁵ Se, to use a ⁶⁰ Co Preferably, since the energy is strong, the opening 11 provides a large opening angle, and at the same time, a strong-energy-type scan surface is formed, thereby conducting a more accurate scan test on the object to be inspected.

Hereinafter, several radiation irradiation apparatuses according to embodiments of the present invention will be described with reference to FIGS. 3 to 8 in order to fully understand the shutter opening / closing implementation of the radiation irradiation apparatus of the present invention.

Referring to FIG. 3, according to an embodiment of the present invention, a moving mechanism is connected to a radiation source 20, and the radiation source 20 performs a linear reciprocating motion to move the radiation source 20 in a first position or a second position The radiation source 20 is driven. As shown in detail, in order to ensure stability and safety during the linear reciprocating motion of the radiation source 20, the chamber of the shielding housing is a cylindrical through-hole vertically provided in the opening 11, The mounting rod 21 is made of a shielding material so that radiation can be prevented from leaking through the through hole. Illustratively, the radiation source 20 can be coupled to the convex portion of the mounting rod 21 by providing a recess at both ends of the cladding of the radiation source 20. Of course, the radiation source 20 may be connected to the mounting rod 21 through other connection methods.

The moving mechanism is a cylinder 30, and the cylinder 30 is connected to the mounting rod 21 to transmit power or indirectly to the mounting rod 21 through a connecting rod. Needless to say, the present invention is not limited to the connection method of the cylinder 30 and the mounting rod 21. It only needs to be able to implement a fixed connection that is mutually removable. The operation of the cylinder 30 is controlled so that the mounting rod 21 is driven to reciprocate linearly in the axial direction in the chamber so that the radiation source 20 is moved so that the position is switched between the first position and the second position do. In some embodiments, the cross-section of the mounting rod 21 may be square, rectangular, or other shape, as long as it matches the chamber and can implement a linear reciprocating motion.

The moving mechanism may be a hydraulic cylinder or an electric putter or an electromagnet, and the manner in which the hydraulic cylinder and the electric putter drive the mounting rod 21 of the radiation source 20 is similar to that of the cylinder 30 and is omitted. It is needless to say that the present invention is not limited to the moving mechanism, but it is only necessary that the driving source is provided to the mounting rod 21 so as to be linearly reciprocated so that the radiation source 20 can be aligned or separated from the opening. In another embodiment, another electric device may be used as the driving mechanism of the radiation source 20. [ For example, a non-direct drive system can be used. Illustratively, a motor is used to drive gears and racks to provide a driving force for the mounting rod 21 to move linearly. The motor is driven to rotate the gear so that the gear engaged with the gear is linearly reciprocated so that the mounting rod 21 connected to the rack is linearly reciprocated. As another example, a driving mechanism may be a method of driving a screw nut by using a motor, so that a mounting rod 21 connected to the driving rod guides the radiation source 20 to reciprocate linearly. Of course, the driving mechanism does not necessarily provide a driving force by using a motor. In another embodiment, it is possible to provide power by selecting other mechanisms capable of providing power, or alternatively, It is possible. Among them, the motor may be directly driven, or may be connected to a speed reducer and driven.

The radiation source 20 realizes the opening and closing of the shutter by being aligned with the opening 11 at the first position through the linear reciprocating motion in the chamber and being detached from the opening 11 at the second position. Since the volume of the radiation source 20 and the mounting rod 21 is small and light in weight, the radiation irradiation apparatus of the present invention can improve the shutter opening / closing speed more effectively than the conventional radiation irradiation apparatus in which a separate shutter opening / And it is possible to avoid the impact caused by the conventional shutter opening / closing apparatus, thereby prolonging the life of the radiation irradiation apparatus. Further, since the shutter opening / closing speed is fast and the radiation opening angle can be controlled, when the vehicle is inspected for example, the driver controls the shutter to be opened quickly when the driver enters the inspection passage, It is possible to omit the drag system, thereby simplifying the structure of the safety inspection apparatus and reducing the cost.

FIG. 4 is a schematic front view of another radiation irradiation apparatus according to the embodiment of the present invention, and FIG. 5 is a left side view of the radiation irradiation apparatus of FIG. 4 and 5, in one embodiment of the present invention, the movable body 52 is formed to be movable relative to the main body of the shielding housing 50 by cutting the main body of the shielding housing 50, 50 by a predetermined distance in a direction away from the main body. That is, the width of the opening 51 can be set as necessary. 5, the cutting angle indicated by the movable portion 52 in the horizontal direction of the shielding housing 50 is less than 180 degrees, and the cutting angle in the horizontal direction of the movable portion 52 is adjusted .

According to the embodiment of the present invention, the movable portion 52 is connected to the cylinder 40 and linearly reciprocates in the horizontal direction due to the driving action of the cylinder 40, so that the movable portion 52 is separated from the main body of the shielding housing 50, . The movable part 52 is a part of the cylinder 40 when the driving mechanism of the radiation source 20 is broken or when the connection of the mounting rod 21 of the radiation source 20 is abnormal or cut, So that the movable portion 52 is immediately recovered so that the opening of the shielding housing 50 is closed. Thus, if there is an abnormality in the driving mechanism of the radiation, the safety and safety of the system can be improved by preventing the radiation safety from being threatened by the radiation accident. Of course, the linear reciprocating motion of the moving part 52 is not limited to the driving according to the cylinder 40, but the cylinder 40 can be replaced by any driving mechanism that drives the linear reciprocating motion of the radiation source 20 have. The movable portion 52 can be applied to any irradiation apparatus according to the embodiment of the present invention as a redundant installation or a shutter opening / closing means. In addition, since the movable portion 52 is small in volume and simple in operation, it is possible to avoid impact on the radiation irradiation apparatus when the shutter is opened and closed in the prior art.

FIG. 6 is a schematic front view of another radiation irradiation apparatus according to the embodiment of the present invention, FIG. 7 is a schematic plan view of the radiation irradiation apparatus of FIG. 6, and FIG. 8 is a cross- Fig. 6 to 8, according to an embodiment of the present invention, the movement mechanism is connected to the radiation source 20 such that the radiation source 20 is positioned at the first position or the second position with respect to the opening 61 20). The rotary shaft 23 is connected to the rotary cylinder 70 and rotates under the rotation of the rotary cylinder 70. The rotary shaft 23 is rotatably supported by the rotary cylinder 70, The radiation source 20 installed on the rotary member 22 is rotated along the rotary member 22 and the radiation source 20 is rotated in the first position (the position aligned with the opening 61) (The position deviated from the opening 61). Of course, if necessary, the radiation source 20 may be continuously positioned at the first position to continuously scan the object to be inspected, or the radiation source 20 may periodically move between the first position and the second position So that intermittent scanning can be performed on the object to be inspected.

Since the volume of the radiation source 20 and the rotary member 22 is small and the operation is simple, the shutter opening / closing speed of the radiation irradiation apparatus can be improved, and the problem that the shutter opening / have.

Illustratively, the rotary member 22 is a disc-shaped structure, and the chamber is a rotary space in which the rotary member 22 can rotate, and in order to easily place the rotary member 22 having the radiation source 20 in the chamber The radiation source entrance passage 63 is opened and the shield member 80 is inserted into the radiation source entrance passage 63 in order to prevent the radiation from leaking after the rotary member 22 on which the radiation source 20 is mounted is disposed in the chamber ) To seal the entry passage 63. Of course, the shielding housing 60 can be formed by docking the half-structure, and in this case, a separate radiation source entrance passage 63 is not necessary, so that the structure of the radiation irradiation apparatus can be simplified.

Of course, the present invention is not limited to the driving mechanism in the moving mechanism, which drives the rotating shaft 23 to rotate. It is only necessary to drive the rotary shaft 23 to rotate the radiation source 20. In another embodiment, for example, the rotary shaft 23 may be directly connected to the motor, and the rotary shaft 23 may be indirectly driven to rotate by connecting a speed reducer to the motor. Alternatively, It may be driven through other mechanisms.

In this embodiment, the rotary member 22 has a disk structure, and rotates so that the radiation source 20 is switched between the first position and the second position. For example, the swing lever may be connected to the lower end of the rotary shaft 23 and the intermediate position of the swing lever may be fixed to the rotary shaft 23, and the swing lever may be disposed in the swing space And has a rotating space. The radiation source 20 is mounted on one end of the swing lever. When the swing lever swings left or right by the rotation axis 23 or when the swing lever rotates around the rotation axis 23, Position and the second position.

Of course, the present invention is not limited to the moving mechanism for driving and moving the radiation source 20. In another embodiment, for example, the chamber of the shielding housing 60 shown in Fig. 8 may be provided as follows. The swing lever is provided in the chamber, the radiation source 20 is mounted on the swing lever, and the swing lever is moved in the right-and-left direction in the body-shaped chamber through the swing mechanism So that the radiation source 20 is switched between the first position and the second position. Of course, the moving mechanism may have a different structure.

In this embodiment, the opening 61 of the shielding housing 60 is formed by cutting the partial structure of the main body of the shielding housing 60 as in the above embodiment. The present embodiment is different from the above embodiment in that the transverse section of the movable section 62 formed in this embodiment has a hollow structure and allows the movable section 62 to ascend or descend in the oblique direction along the oblique cut surface. Similarly, the movable portion 62 can be connected to the driving mechanism as a redundant installation, and immediately closes the opening portion 61 when the rotating member or the driving device of the rotating member fails. Further, since the movable part 62 is small in volume and simple in operation, it can be used as a structure for controlling the opening and closing of the shutter, so that it is possible to avoid a problem that a large impact is applied to the radiation irradiation apparatus when the shutter is opened or closed.

In the safety inspecting apparatus according to the embodiment of the present invention (for example, a vehicle inspecting apparatus), the radiation irradiating apparatus is mounted, and the radiation irradiating apparatus is mounted on the bottom surface, the top surface or the side surface of the inspection path of the safety inspection apparatus. It is preferable that the irradiation apparatus is mounted on the bottom surface of the inspection passage. Since the radiation irradiation apparatus of the embodiment of the present invention is installed on the bottom surface of the inspection passage with a large radiation opening angle, it has a large radiation area while maintaining a relatively short distance from the inspection vehicle in the inspection process, .

According to an embodiment of the present invention, the safety inspecting apparatus further includes a sensor for inspecting the control unit and the inspecting vehicle in the inspection passage, and the sensor detects that the moving object enters the inspection passage of the safety inspecting apparatus, The control unit controls the operation of the moving mechanism of the irradiation apparatus installed in the inspection passage to move the radiation source to the opening of the shielding housing, In conjunction with the detectors installed in the vehicle. Of course, if necessary, the radiation source may be continuously placed in the opening to scan the inspection vehicle, or the radiation source may be moved through the movement mechanism to periodically scan the inspection vehicle. When it is detected that the inspection of the inspection vehicle is completed by the sensor, the control unit transmits the information again to the control unit, and the control unit controls the movement mechanism to move the radiation source to the second position and then stop the movement mechanism. The safety inspection apparatus of the present embodiment is equipped with the above-described radiation irradiation apparatus, and it is possible to control the rapid opening / closing of the shutter of the radiation irradiation apparatus according to the entry state of the inspection subject vehicle. So that the inspection efficiency is improved and the accuracy of the inspection result is secured.

Claims (10)

A radiation source for providing radiation,
A shielding housing including a chamber accommodating the radiation source and an opening communicating with the chamber, the shielding housing allowing the radiation source to emit radiation to the outside through the opening;
Wherein the radiation source is arranged at a first position with respect to the shielding housing so that the radiation is emitted to the outside through the opening and a second position where the radiation is released from the opening through the opening, Movement mechanism to move at 2 position
And an irradiation unit for irradiating the radiation. The method according to claim 1,
Wherein the radiation source is an isotope radiation. 3. The method of claim 2,
Wherein the isotope radiation source is any one of ⁶⁰ Co, ¹³⁷ Cs, ¹⁹² Ir, and ⁷⁵ Se. The method according to claim 1,
Wherein the moving mechanism is connected to the radiation source so that the radiation source is reciprocated linearly. 5. The method of claim 4,
Wherein the moving mechanism includes a driving cylinder, a hydraulic cylinder, an electric putter, or an electromagnet which drives the radiation source in a linear reciprocating motion. The method according to claim 1,
Wherein the moving mechanism is connected to the radiation source to cause the radiation source to rotate. The method according to claim 6,
Wherein the moving mechanism includes a rotating member, and the radiation source is arranged to be eccentric with respect to a rotation axis of the rotating member. The method according to claim 1,
Wherein the shielding housing further comprises a movable portion capable of closing the opening portion. The method according to claim 1,
Wherein the opening is formed in a slot shape so that the radiation emitted through the opening forms a scan surface. A safety inspection apparatus comprising a radiation irradiation apparatus according to any one of claims 1 to 9.

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