Patent Publication Number: US-10784008-B2

Title: Shield cover for radiation source machine and security inspection apparatus

Description:
CROSS REFERENCE 
     The present application claims a priority of the Chinese Application No. 201711008514.1, filed on Oct. 25, 2017, the entire of which is incorporated here by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a field of radiation detecting technology, particularly to a shield cover for a radiation source machine and a security inspection apparatus. 
     BACKGROUND 
     A radiation source machine is mainly used for irradiating an object under detection by a beam of rays generated by a ray tube, so that the rays hit a detector after absorption by the object under detection. The detector converts the rays into a signal, and the signal is amplified and processed to be displayed on a display screen, which can assist an inspector to distinguish different substances simply and quickly. 
     During the use of the radiation source machine, as a radiation surface for emitting the rays of the ray tube is large, the detector cannot receive all of the rays, and thus there are radiation rays which fails to be used for acting on the object under detection. Due to a large radiation of X-rays, if the X-rays that cannot be received by the detector or are not used is not shielded after emitted, unnecessary damage to the human body will occur. 
     SUMMARY 
     Embodiments of the present disclosure provide a shield cover for a radiation source machine and a security inspection apparatus, which can effectively shield useless rays generated by the radiation source machine, thereby avoiding damage to the human body without damaging the radiation source machine itself. 
     An aspect of an embodiment of the present disclosure provides a shield cover for a radiation source machine, comprising: a frame body provided with a receiving chamber for receiving the radiation source machine, an end opening and an ray exit through which rays are emitted out from the radiation source machine; an end cover disposed at the end opening of the frame body and provided with a sealed chamber communicating with the receiving chamber; and a connecting member disposed between the end cover and the frame body and provided with an opening for communicating the sealed chamber of the end cover with the receiving chamber of the frame body, and the end cover being movably connected to the frame body by the connecting member such that a distance of the end cover from the end opening of the frame body is adjustable. 
     According to one embodiment of the present disclosure, the connecting member comprises a first connecting member and a second connecting member, a side of the first connecting member is fixedly connected to the end cover and the other side of the first connecting member is movably connected to the frame body, and a side of the second connecting member is fixedly connected to the end cover and the other side of the second connecting member is movably connected to the frame body, wherein the first connecting member and the second connecting member are arranged to mate with each other to form the opening. 
     According to one embodiment of the present disclosure, the first connecting member and the frame body are respectively provided with a first hole and a second hole corresponding with each other, wherein at least one of the first hole and the second hole is formed into a strip-shaped hole, and a first connector is disposed within the first hole and the second hole to movably connect the first connecting member to the frame body, and the second connecting member and the frame body are respectively provided with a third hole and a fourth hole corresponding with each other, wherein at least one of the third hole and the fourth hole is formed into a strip-shaped hole, and a second connector is disposed within the third hole and the fourth hole to movably connect the second connecting member to the frame body. 
     According to one embodiment of the present disclosure, the connecting member is provided with an enclosing member surrounding the opening and extending into the receiving chamber, and an outer wall surface of the enclosing member and an inner wall surface of the receiving chamber are kept overlapping with each other with a gap remained therebetween. 
     According to one embodiment of the present disclosure, the frame body, the end cover, and the enclosing member are provided with anti-radiation plates on their respective wall surfaces. 
     According to one embodiment of the present disclosure, the anti-radiation plates are provided on respective inner wall surfaces of the frame body, the end cover and the enclosing member, and two adjacent ends of two adjacent anti-radiation plates are in an overlapping connection with each other. 
     According to one embodiment of the present disclosure, one of the two adjacent ends is formed with a stepped portion, and the other of the two adjacent ends is formed to mate with the stepped portion such that the two adjacent ends are in the overlapping connection with each other. 
     According to one embodiment of the present disclosure, the frame body is formed into a separated structure and includes a top cover and a bottom cover in connection with each other. 
     According to one embodiment of the present disclosure, the end cover is provided with an auxiliary positioning member, an end of which is formed to extend into the sealed chamber so as to be capable of abutting the radiation source machine and limiting a horizontal play of the radiation source machine. 
     According to one embodiment of the present disclosure, the auxiliary positioning member is formed as a rod threadedly connected to the end cover. 
     The shield cover for a radiation source machine according to the embodiments of the present disclosure includes the frame body, the end cover body and the connecting member. The receiving chamber, the end opening and the ray exit are provided on the frame body. The end cover is movably connected at the end opening of the frame body by the connecting member. The radiation source machine is received in the receiving chamber of the frame body, with two ends extending into the corresponding sealed chambers of the end cover through the opening of the connecting member. The rays emitted by the radiation source machine can emit out only through the ray exit on the frame body to detect the object under detection, and the remaining rays are shielded by the shield cover for a radiation source machine to avoid the human body from being damaged. Meanwhile, by changing a relative position of the end cover to the frame body, a distance of the end cover from the end opening can be changed, so that the inner end surface of the end cover can just lie against the end surface of the radiation source machine, to limit a position of the radiation source machine, meeting a detection requirement for an object under detection without damaging the radiation source machine itself. 
     Another aspect of an embodiment of the present disclosure provides a security inspection apparatus, comprising: the shield cover for a radiation source machine as described above; a radiation source machine disposed in the receiving chamber; a U-shaped arm provided on an outside of the frame body and connected to the radiation source machine to make the radiation source machine in a suspended state in the receiving chamber. 
     According to an embodiment of the present disclosure, the U-shaped arm is engaged with the frame body with the frame body received in an U-shaped opening of the U-shaped arm, and the frame body is provided with a fixing seat at a position corresponding to the U-shaped arm, through which the U-shaped arm is connected to the frame body, wherein an adjusting pad is provided between a bottom of the U-shaped arm and the fixing seat 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Features, advantages, and technical effects of exemplary embodiments of the present disclosure will be described below with reference to the accompanying drawings: 
         FIG. 1  is a front view showing a structure of a shield cover for a radiation source machine according to an embodiment of the present disclosure; 
         FIG. 2  is a schematic view showing an overall structure of a frame body according to an embodiment of the present disclosure; 
         FIG. 3  is a schematic view showing a structure of a bottom cover according to an embodiment of the present disclosure; 
         FIG. 4  is a schematic view showing a structure of a top cover according to an embodiment of the present disclosure; 
         FIG. 5  is a schematic view showing a structure of an end cover according to an embodiment of the present disclosure; 
         FIG. 6  is a schematic view showing a structure of a connecting member according to an embodiment of the present disclosure; 
         FIG. 7  is a schematic view showing a structure of a connecting member mounted on an end cover according to an embodiment of the present disclosure; 
         FIG. 8  is a schematic view showing a structure of a second connecting member according to an embodiment of the present disclosure; 
         FIG. 9  is a cross-sectional view of  FIG. 1  taken along line A-A; 
         FIG. 10  is an enlarged view of a portion B in  FIG. 9 ; 
         FIG. 11  is a schematic view showing a structure of a security inspection apparatus according to an embodiment of the present disclosure; 
         FIG. 12  is a partial cross-sectional view showing a U-shaped arm mating with a fixing seat according to an embodiment of the present disclosure; and 
         FIG. 13  shows a flowchart of a method of radiating an object by use of a radiation source machine of the present disclosure. 
     
    
    
     Wherein: 
       1 —Shield cover for radiation source machine; 
       10 —Frame body;  11 —Top cover;  12 —Bottom cover;  13 —Receiving chamber;  14 —End opening;  15 —Ray exit;  16 —Reinforced beam; 
       121 —Main shielding body;  121   a —Bottom plate;  121   b —Side plate;  121   c —Upper opening;  121   d —Side opening; 
       122 —Auxiliary shielding body;  123 —Second hole;  124 —Fourth hole; 
       20 —End cover;  21 —End plate;  22 —Annular side plate;  23 —Sealed chamber;  24 —Through hole;  25 —Auxiliary positioning member;  26 —Reinforced rib; 
       30 —Connecting member;  31 —First connecting member;  32 —Second connecting member;  33 —Enclosing member;  34 —Opening; 
       311 —First mounting plate;  312 —First connecting tab;  313 —First hole;  314 —Connector;  315 —Positioning pin; 
       321 —Second mounting plate;  322 —Second connecting tab;  323 —Third hole;  324 —Connector; 
       40 —Anti-radiation plate;  41 —Stepped portion 
       2 —U-shaped arm;  3 —Connecting component;  4 —Fixing seat; 
       410 —Frame body connecting end;  420 —U-shaped arm connecting end;  421 —U-shaped groove;  422 —Adjusting pad. 
     DETAILED DESCRIPTION 
     Features and exemplary embodiments of various aspects of the present disclosure will be described in detail below. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the present disclosure. It will be apparent to the person skilled in the art, however, that the present disclosure may be practiced without some of these details. The following description of embodiments is merely for providing a better understanding of the invention by providing examples of the present disclosure. In the drawings and the following description, at least some of known structures and techniques are not shown in order to avoid unnecessary obscuring of the present disclosure. For clarity, dimensions of some of structures may be exaggerated. Features, structures, or characteristics described below may be combined in any suitable manner in one or more embodiments. Further, terms “first”, “second”, “third”, etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. 
     Words indicating orientation appearing in the following description are all directions shown in the drawings, and are not intended to limit the specific structure of the shied cover for a radiation source machine of the present disclosure. In the description of the present disclosure, it should be noted that terms “installation” and “connection” are to be understood broadly, and may be, for example, a fixed connection or a detachable connection, or an integral connection; they can be a direct or indirect connection. The specific meaning of the above terms in the present disclosure can be understood by the person skilled in the art depending on specific cases. 
     For a better understanding of the present disclosure, a shield cover for a radiation source machine  1  according to embodiments of the present disclosure will be described in detail below with reference to  FIG. 1  to  FIG. 10 . 
     As shown in  FIG. 1 , an embodiment of the present disclosure provides a shield cover for a radiation source machine  1  including a frame body  10 , an end cover  20  and a connecting member  30 . The frame body  10  is formed with a receiving chamber  13 , an end opening  14  and a ray exit  15 . The receiving chamber  13  is used for receiving the radiation source machine. The ray exit  15  is used for rays emitted out from the radiation source machine through it. The end cover  20  is disposed at the end opening  14  and is formed with a sealed chamber  23  communicating with the receiving chamber  13 . The connecting member  30  is disposed between the end cover  20  and the frame body  10  and is formed with an opening  34  for communicating the sealed chamber  23  with the receiving chamber  13 . The end cover  20  is movably connected to the frame body  10  by the connecting member  30  such that a distance of the end cover  20  from the end opening  14  is adjustable. 
     Specifically, as shown in  FIG. 2 , the frame body  10  is formed into a separated structure, and includes a top cover  11  and a bottom cover  12  connected with each other. The frame body  10  with the separated structure facilitates installation of the radiation source machine. 
     As shown in  FIG. 2  and  FIG. 3 , the bottom cover  12  includes a main shielding body  121  and an auxiliary shielding body  122  provided on the main shielding body  121 . The main shielding body  121  preferably includes a bottom plate  121   a  and two side plates  121   b  provided on both sides of the bottom plate  121   a , such that the main shielding body  121  has a U-shaped cross section and is formed with an upper opening  121   c  and two side openings  121   d . The auxiliary shielding body  122  is located on two side plates  121   b  of the main shielding body  121 , particularly on outer wall surfaces of the two side plates  121   b . The auxiliary shielding body  122  may preferably be one or more of a group consisting of: a hollow cylindrical cover, a hollow rectangular cover and a square tube. The auxiliary shielding body  122  is mainly used for receiving a high voltage controller, cables, etc. of the radiation source machine. The bottom cover  12  with the above structure can meet a shielding requirement for the radiation source machine, can reduce overall size of the shield cover for a radiation source machine  1  and thus occupation space thereof, and have a wide application range. 
     As shown in  FIGS. 2 and 4 , the top cover  11  is of a rectangular frame structure with an opening on one side, and the ray exit  15  is located on the top cover  11 . A length of the top cover  11  corresponds to that of the bottom cover  12 . The side of the top cover  11  having the opening is connected to the upper opening  121   c  of the bottom cover  12  to form the frame body  10  with an internal chamber, which is the receiving chamber  13  for receiving the radiation source machine, and the two side openings  121   d  of the bottom cover  12  are the end openings  14  of the frame body  10 . In order to ensure the strength of the frame body  10 , a reinforced beam  16  is connected between the top cover  11  and the bottom cover  12 . 
     As shown in  FIG. 5 , the end cover  20  includes two end plates  21  arranged in parallel and an annular side plate  22  connected between the two end plates  21 , and the sealed chamber  23  is formed by the two end plates  21  and the annular side plate  22  together. The end plate  21  closer to the end opening  14  is provided with a through hole  24 , for communicating with the receiving chamber  13 . In order to ensure strength of the end cover  20 , a reinforced rib  26  is connected between the annular side plate  22  and the two end plates  21 . 
     In the embodiment, the frame body  10  includes two end openings  14 . Therefore, one end cover  20  is provided at each end opening  14 , and the end cover  20  is movably connected to the frame body  10  by the connecting member  30 . 
     In an optional embodiment, as shown in  FIG. 1  and  FIG. 6 , the connecting member  30  includes a first connecting member  31  and a second connecting member  32 . A side of the first connecting member  31  is fixedly connected to the end cover  20  and the other side thereof is movably connected to the frame body  10 . A side of the second connecting member  32  is fixedly connected to the end cover  20  and the other side thereof is movably connected to the frame body  10 . The first connecting member  31  and the second connecting member  32  are arranged to mate with each other to form an opening  34 . Since the radiation source machine has a dimension of cross section at two ends larger than at its middle portion, the connecting member  30  is designed as a separated structure consisting of the first connecting member  31  and the second connecting member  32 , so that the radiation source machine can smoothly enter into the sealed chamber  23  of the end cover  20  through the opening  34  of the connecting member  30  and meanwhile the shielding effect of the shield cover for a radiation source machine can be ensured. 
     Specifically, as shown in  FIG. 1 ,  FIG. 2 ,  FIG. 6  and  FIG. 7 , the first connecting member  31  includes a first mounting plate  311  and a first connecting tab  312  located on the first mounting plate  311 . The first mounting plate  311  is formed with a hole penetrating through the first mounting plate  311 , so that the first mounting plate  311  can be connected to the end plate  21  of the corresponding end cover  20  by a fastener. The first connecting tab  312  is formed with a first hole  313  and the top cover  11  is formed with a second hole  123  corresponding to the first hole  313 , wherein the first hole  313  is formed into a strip-shaped hole. A connector  314 , which may be a fastening screw, is disposed in the first hole  313  and the second hole  123  so that the first connecting member  31  is movably connected to the frame body  10 . As a result, a requirement that a side of the first connecting member  31  is fixedly connected to the end cover member  20  and the other side thereof is movably connected to the frame body  10  is satisfied. 
     As shown in  FIG. 1 ,  FIG. 2 , and  FIG. 6  to  FIG. 8 , the second connecting member  31  includes a second mounting plate  321  and a second connecting tab  312  located on the second mounting plate  321 . The second mounting plate  321  can be connected to the end plate  21  of the corresponding end cover  20  by a fastener. The second connecting tab  322  is formed with a third hole  323  and the bottom cover  12  is formed with a fourth hole  124  corresponding to the third hole  323 , wherein the third hole  323  is formed into a strip-shaped hole. A connector  324 , which can be a fastening screw, is disposed in the third hole  323  and the fourth hole  124 , so that the second connecting member  32  is movably connected to the frame body  10 . As a result, a requirement that a side of the second connecting member  32  is fixedly connected to the end cover member  20  and the other side thereof is movably connected to the frame body  10  is satisfied. Meanwhile, the second mounting plate  321  of the second connecting member  32  is mated and connected with the first mounting plate  311  of the first connecting member  31  to form the opening  34  of the connecting member  30 , for communicating with the receiving chamber  13  of the frame body  10  and the sealed chamber  23  of the end cover  20 . 
     Therefore, during use of the shield cover for a radiation source machine of the embodiments of the present disclosure, the radiation source machine is received in the receiving chamber  13  of the frame body  10 , with two ends extending into corresponding sealed chambers  23  of the end covers  20  through the openings of the connecting members  30 . The rays emitted from the radiation source machine can only be emitted out through the ray exit  15  on the top cover  11  to scan the object under detection, and the remaining rays will be shielded by the shield cover for a radiation source machine  1 . Thus, the shield cover of the present disclosure can be effectively shield the useless rays generated by the radiation source machine, avoiding the human body from being damaged. 
     Further, by changing a relative position of the connecting member  30  to the frame body  10  and thereby changing a relative position of the end cover  20  to the frame body  10 , a distance of the end cover  20  from the end opening  14  can be changed such that an inner end surface of the end cover  20  can just lie against an end surface of the radiation source machine. Thus, a position of the radiation source machine and thus a horizontal play of the radiation source machine can be limited, to meet a requirement on the detection of the object under detection. 
     In order to better limit the horizontal play of the radiation source machine, as shown in  FIG. 1  and  FIG. 5 , the end cover  20  is provided with an auxiliary positioning member  25 . An end of the auxiliary positioning member  25  is provided to extend into the sealed chamber  23  and is able to abut the end surface of the radiation source machine. In an embodiment, the auxiliary positioning member  25  is formed as a rod that is threadedly connected to the end cover  20 . Since the end face of the radiation source machine can withstand a pressing force and cannot withstand a pulling force, with such a shielding and adjusting manner, the radiation source machine itself will not be damaged. 
     It can be understood that the frame body  10  is not limited to the form in which the top cover  11  is connected with the bottom cover  12 , and may also be in a form in which several covers are connected, for example, in a form in which one bottom cover  12  is connected with two top covers  11 , as long as that a requirement of receiving the radiation source machine and effectively shielding the radiation source machine can be satisfied without damaging the radiation source machine itself. 
     Further, the bottom cover  12  is not limited to consisting of the main shielding body  121  and the auxiliary shielding body  122  mated with each other. In the case that the space is sufficiently large, it is possible for the bottom cover  12  to merely include a single main shielding body  121 , and to place the radiation source machine and all the components, such as the high voltage controller, of the radiation source machine within the main shielding body  121  for shielding, without the need of providing the auxiliary shielding body  122 . 
     Meanwhile, the first hole  313  is not limited to a strip-shaped hole. In an embodiment, the second hole  123  may be designed as a strip-shaped hole, or both of the first hole  313  and the second hole  123  may be designed as strip-shaped holes. The third hole  323  is not limited to a strip-shaped hole. In an embodiment, the fourth hole  124  may be designed as a strip-shaped hole, or both of the third hole  323  and the fourth hole  124  may be designed as strip-shaped holes. These embodiment are all possible, as long as that the first connecting member  31  is movably connected to the top cover  11  of the frame body  10  and the second connecting member  32  is movably connected to the bottom cover  12  of the frame body  10  so that the end cover  20  can move relative to the frame body  10  to adjust the distance of the end cover  20  from the end opening  14 . 
     Since the connecting member  30  needs to be moved relative to the frame body  10  to adjust the distance of the end cover  20  from the end opening  14 , as an optional embodiment, as shown in  FIG. 1  and  FIG. 6 , an enclosing member  33  extending into the receiving chamber  13  is provided on the connecting member  30  surrounding the opening  34 , to prevent the rays from the radiation source machine from leaking when the connecting member  30  is moved relative to the frame body  10 . An outer wall surface of the enclosing member  33  and an inner wall surface of the receiving chamber  13  are always kept overlapping with each other during the movement of connecting member  30  with a gap remained therebetween. The overlapping length between the outer wall surface of the enclosing member  33  and the inner wall surface of the receiving chamber  13  may be 15 to 20 times the length of the gap between the outer wall surface of the enclosing member  33  and the inner wall surface of the receiving chamber  13 . As a result, the connecting member  30  is easily moved relative to the frame body  10 , and when the connecting member  30  is moved relative to the frame body  10 , the rays will not leak from the gap between the frame body  10  and the connecting member  30 , thereby ensuring a shielding effect of the shield cover  1  for the rays of the radiation source machine. Meanwhile, when the connecting member  30  is moved relative to the frame body  10 , the enclosing member  33  can play a corresponding guiding role. As shown in  FIG. 6  to  FIG. 8 , the enclosing member  33  is formed by two separated parts respectively provided on the first connecting member  31  and the second connecting member  32 . When the first connecting member  31  and the second connecting member  32  are mated with each other, the enclosing member  33  is formed, which facilitates an installation of the radiation source machine. In one embodiment, a length of the enclosing member  33  extending into the receiving chamber  13  is larger than that of the strip-shaped hole to avoid that the enclosing member  33  is moved out of the receiving chamber  13  due to an over-adjustment. 
     In the shield cover for a radiation source machine  1  of the embodiment of the present disclosure, the frame body  10 , the end cover  20  and the connecting member  30  all can be made of a radiation-proof material, to meet shielding requirements for the rays of the radiation source machine. 
     As a preferred embodiment, the frame body  10 , the end cover  20  and the connecting member  30  may be made of a metal material or the like, and each of the frame body  10 , the end cover  20  and the enclosing member  33  is provided with an anti-radiation plate, such as a lead plate on the respective wall surface, which can also meet an anti-radiation requirement for the rays of the radiation source machine, and meanwhile can ensure strength of the shield cover for a radiation source machine  1  with a lower cost. 
     As a preferred embodiment, the anti-radiation plate is provided on an inner wall surface of each of the frame body  10 , the end cover  20  and the enclosing member  33 . As strength of the anti-radiation plate, such as the lead plate, is not high, and a surface of the plate cannot be ensured to be completely flat, when adjacent ends of two adjacent anti-radiation plates are directly engaged with each other, it is impossible to ensure a complete closure and there is a gap therebetween. As shown in  FIG. 9  and  FIG. 10 , where the bottom cover  12  of the frame body  10  is taken as an example, an anti-radiation plate  40  on the bottom plate  121   a  and an anti-radiation plate  40  on the side plate  121   b  constitute two adjacent anti-radiation plates  40 , and two ends each of which is from one of the two adjacent anti-radiation plates  40 , contacting with and abutting each other are adjacent ends of the two adjacent anti-radiation plates  40 . If the adjacent ends of the two adjacent anti-radiation plates  40  are contact with each other directly, the rays will emit out directly and leak from the gap between the two adjacent anti-radiation plates  40 . Therefore, the adjacent ends of the two adjacent anti-radiation plates  40  are arranged to be in an overlapping connection with each other, to prevent leakage of the rays from the radiation source machine. In one embodiment, one of the adjacent ends is formed with a stepped portion  41 , and the other of the adjacent ends is formed to mate with the stepped surface  41  such that the adjacent ends are in the overlapping connection with each other. 
     Since the adjacent ends of the two adjacent anti-radiation plates  40  are in the overlapping connection with each other, even if there is a gap between the adjacent ends, the rays cannot emit out directly and leak from the gap, further improving a shielding effect of the shield cover for a radiation source machine  1 . In this embodiment, the two adjacent anti-radiation plates  40  on the bottom cover  12  are only described as an example, and the overlapping connection between the adjacent ends of two adjacent anti-radiation plates  40  is not limited to the bottom cover  12 . For the shield cover for a radiation source machine  1 , it is possible for the anti-radiation plates  40  provided on all the members, for example, the top cover  11 , the end cover  20 , and the enclosing member  33 , etc., to connect adjacent ends by the overlapping manner according to an anti-radiation requirement, to improve the shielding effect of the shield cover for a radiation source machine  1 . 
     During use of the shield cover for a radiation source machine  1  provided by the embodiment of the present disclosure, the radiation source machine is placed in the receiving chamber  13 , and the top cover  11 , the bottom cover  12  and the end cover  20  of the frame body  10  are connected by the connecting member  30 . A distance of the end cover  20  from the end opening  14  is changed by changing a relative position of the connecting member  30  to the frame body  10 . After the relative position is adjusted and determined, the connector  314  in the first hole  313  and the second hole  123  and the connector  324  in the third hole  323  and the fourth hole  124  are tightened to lock the relative position of the end cover  20  to the frame body  10 , so that the inner end surface of the end cover  20  and the end surface of the radiation source machine just lie against each other and the position of the radiation source machine is limited. A positioning pin  315  can be punched on the spot to ensure a repeated positioning accuracy when re-installing. Meanwhile, the auxiliary positioning member  25  on the end cover  20  is adjusted to abut the end face of the radiation source machine to better limit the horizontal play of the radiation source machine. The shield cover for a radiation source machine  1  provided by the embodiments of the present disclosure can effectively shield the useless rays generated by the radiation source machine to prevent the human body from being damaged, without damaging the radiation source machine itself, and is easy to spread and use. 
     As shown in  FIG. 11 , a security inspection apparatus provided according to an embodiment of the present disclosure includes: the shield cover for a radiation source machine  1  of any of the above embodiments, the radiation source machine and the U-shaped arm  2 . The radiation source machine is disposed in the receiving chamber  13 . There are two U-shaped arms  2  symmetrically provided on an outside of the frame body  10  and connected to the radiation source machine to make the radiation source machine in a suspended state in the receiving chamber  13 . 
     Specifically, connecting holes are correspondingly provided on the outer wall of the frame body  10  and the U-shaped arm  2 . A connecting component  3  is connected to the radiation source machine through the corresponding connecting holes on the U-shaped arm  2  and the frame body  10 , so that the radiation source machine is in the suspended state in the receiving chamber  13 . Preferably, the suspended state means that side wall surfaces of the radiation source machine are not in contact with wall surfaces of the receiving chamber  13 . 
     In an optional embodiment, as shown in  FIG. 11  and  FIG. 12 , the frame body  10  is engaged with the U-shaped arm  2 , with the frame body  10  received in a U-shaped opening of the U-shaped arm  2 , and a fixing seat  4  is provided on a position of the frame body  10  corresponding to the U-shaped arm  2 . The U-shaped arm  2  is connected to the frame body  10  by the fixing seat  4 , and the fixing seat  4  includes a frame body connecting end  410  and a U-shaped arm connecting end  420 . The frame body connecting end  410  is connected to the frame body  10 , and the U-shaped arm connecting end  420  has a U-shaped groove  421  with a shape matching with that of a bottom of the U-shaped arm  2 . The bottom of the U-shaped arm  2  is located in the U-shaped groove  421  and is fixedly connected with the fixing seat  4  by a fastener. An adjusting pad  422  is provided between the bottom of the U-shaped arm  2  and the fixing seat  4 , and the adjusting pad  422  is preferably located within the U-shaped groove  421 . The adjusting pad  422  can be increased or decreased, that is, a thickness of the adjusting pad  422  can be changed to compensate an error generated in the machining, so that the U-shaped arm  2  can only bear a longitudinal force, does not bear a horizontal thrust and torsional force, to satisfy a force requirement for the U-shaped arm  2 . 
     In the security inspection apparatus provided by the embodiments of the present disclosure, the rays emitted by the radiation source machine can only emit out through the ray exit  15  on the frame body  10  to scan the object under detection, and the remaining rays will be shielded by the shield cover for a radiation source machine  1 . The useless rays generated by the radiation source machine can effectively shielded to avoid the human body from being damaged. By changing the relative position of the connecting member  30  to the frame body  10 , the distance of the end cover  20  from the end opening  14  can be changed, such that the inner end surface of the end cover  20  can just lie against the end surface of the radiation source machine, to limit the horizontal position of the radiation source machine, meeting a detecting requirement for the object under detection. Moreover, the radiation source machine is in a suspended state in the receiving chamber  13 , which does not cause damage to the radiation source machine itself and a force requirement for the radiation source machine is satisfied. 
       FIG. 13  shows a flowchart of a method of radiating an object by use of a radiation source machine of the present disclosure. The object may be a person with cancer, objects to eradicate bacteria. The method comprises placing an object within a radiation source machine (Step S 1 ); irradiating the object (Step S 2 ); and receiving radiation that passed through the object (Step S 3 ). 
     Although the present disclosure has been described with reference to the preferred embodiments thereof, various modifications may be made thereto and components may be replaced with equivalents without departing from the scope of the present disclosure. In particular, technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.