CN210109341U

CN210109341U - Radioactivity detection equipment with shielding part

Info

Publication number: CN210109341U
Application number: CN201920799111.1U
Authority: CN
Inventors: 董伟; 王凯; 赵崑
Original assignee: Nuctech Co Ltd
Current assignee: Nuctech Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-02-21
Anticipated expiration: 2029-05-29

Abstract

The utility model relates to a radioactivity detection technology field discloses a take radioactivity check out test set of shielding piece, which comprises a housin, base and radioactivity detector, radioactivity detector is arranged in the space that is enclosed by casing and base, be provided with the inside lining between radioactivity detector's surface and the internal surface of casing, the outer peripheral surface of the first end of inside lining is provided with the shielding piece, the shielding piece is formed with the opening on its circumferencial direction, radioactivity detector passes through the opening and receives the radiation, be provided with the pilot symbol on the base, the pilot symbol coincides with the projection of the open-ended position of shielding piece on the cross section of inside lining, with the position of the opening of shielding piece is confirmed through the pilot symbol, and then confirm radioactivity detector's direction of operation.

Description

Radioactivity detection equipment with shielding part

Technical Field

The utility model relates to a radioactivity detection technology field. More specifically, the present invention relates to a radioactivity detecting apparatus with a shield.

Background

Ionizing radiation is imperceptible to humans, and thus people must detect various kinds of radiation by means of a radioactivity detecting device with a radioactivity detector to obtain characteristics of the type, intensity, capability, etc. of the radiation, at entrances of customs, airports, large public halls, etc., various kinds of security inspection devices are generally used to detect pedestrians, luggage, vehicles, containers, etc. including a radioactivity detecting device, an X-ray security inspection machine, a CT security inspection machine, a vehicle imaging inspection system, a human body security inspection system, etc. when the radioactivity detecting device is used near the X-ray security inspection machine, the CT security inspection machine, or when the radioactivity detecting device is integrated on other security inspection devices having nuclear radiation (e.g., a vehicle imaging inspection system, a human body security inspection system), the normal operation of the radioactivity detecting device is affected by the operation of the security inspection device having, e.g., nuclear radiation, therefore, the radioactivity detecting device needs to be additionally provided with a shielding element on one side of the radioactivity detector facing the nuclear radiation security check device to shield radiation, so that the radioactivity detecting device is ensured to be in a stable background environment, and the device can normally and stably work.

However, some existing radiation detection apparatuses with shields have difficulty in determining the working direction of the radiation detector at the time of installation, thereby causing installation difficulty. In addition, the shock absorption effect on the radioactive detector is poor, and the structure is complex.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a radiation detection apparatus that facilitates determining the working direction of a radiation detector.

According to the embodiment of the utility model, a take radioactivity check out test set of shielding piece is provided, including casing, base and radioactivity detector, the radioactivity detector be located by the casing with in the space that the base encloses, the surface of radioactivity detector with be provided with the inside lining between the internal surface of casing, the outer peripheral surface of the first end of inside lining is provided with the shielding piece, the shielding piece is formed with the opening on its circumferencial direction, the radioactivity detector passes through the radiation is received to the opening, be provided with the pilot symbol on the base, the pilot symbol with the open-ended position of shielding piece is in projection coincidence on the cross section of inside lining, with pass through the pilot symbol is confirmed the open-ended position of shielding piece.

According to the utility model discloses a radioactivity check out test set, the inside lining with the second end that first end is opposite is provided with first location portion, the open-ended position of shielding part with the position of first location portion is in the central angle that projection on the cross section of inside lining corresponds is first central angle, be provided with on the base with first location portion complex second location portion, the indicator with second location portion is in the central angle that projection on the cross section of inside lining corresponds is second central angle, first central angle with second central angle equals.

According to the utility model discloses a radioactivity detection equipment, the base includes base body and follows base body stretches into central boss portion in the inner chamber of casing, base body with the detachable connection of casing.

According to the radioactivity detecting device provided by the embodiment of the utility model, the first positioning part is a positioning boss arranged on the end face of the second end of the lining, and the second positioning part is a positioning groove arranged on the central boss part and matched with the positioning boss; or the first positioning part is a positioning groove arranged on the end face of the second end of the lining, and the second positioning part is a positioning boss arranged on the central boss part and matched with the positioning groove.

According to the utility model discloses a radioactivity detection equipment, the location boss is the T font.

According to the utility model discloses a radioactivity detection equipment, the second end of inside lining is provided with the confession the hole that radioactivity detector's cable passed through, the cable is connected with external power source via the interface, be provided with on the base and be applicable to the installation the interface mounting hole of interface, the interface mounting hole and/or the interface is used as the pilot mark.

According to the utility model discloses a radioactivity detection equipment, the central angle that the opening corresponds is 45 to 135.

According to the utility model discloses a radioactivity detection equipment, the inside lining has the hole in order to hold the radioactivity detector, the shape of hole with the outline of radioactivity detector suits.

According to the utility model discloses a radioactivity detection equipment still includes the inside lining lid, the inside lining lid includes inside lining lid body and follows the perpendicular to the plane at inside lining lid body place is followed the annular boss that the inside lining lid body extends, in order to fill the radioactivity detector top with gap between the inside lining.

According to the utility model discloses a radioactivity detection equipment, the first end of inside lining is provided with the recess that extends radially inwards from its outer circumferential surface, the shield is installed in the recess.

According to the utility model discloses a radioactivity detection equipment, the shielding part adopts the stereotype to make.

According to the utility model discloses a radioactivity detection equipment, still be provided with the pedestal mounting hole on the base, with will radioactivity detection equipment fixes at operating position.

According to the utility model discloses a radioactivity detection equipment, radioactivity detection equipment still includes the sealing washer, the sealing washer is located the casing with between the radial surface of base.

According to the utility model discloses a radioactivity detection equipment, the open end of casing is provided with the installation base that radially outwards extends, the sealing washer is located the installation base with between the radial surface of installation base.

According to the utility model discloses radioactivity detection equipment of embodiment, the inside lining is made by ethylene-vinyl acetate copolymer (EVA).

According to the above-mentioned various embodiments of the utility model the radioactivity detection equipment of area shielding piece, through set up the pilot mark on the base, this pilot mark roughly coincides with the projection of the open-ended position of shielding piece on the cross section of inside lining to confirm the open-ended position of shielding piece through the pilot mark, and then confirm the direction of operation of radioactivity detector, thereby can make the shielding piece orientation have for example the safety inspection equipment of nuclear radiation when the installation, in order to avoid this safety inspection equipment to influence the normal work of radioactive substance monitoring equipment.

Drawings

Fig. 1 is an exploded schematic view of a shielded radioactivity detecting apparatus in accordance with an exemplary embodiment of the present invention;

fig. 2 is a cross-sectional view of a shielded radioactivity detecting apparatus in accordance with an exemplary embodiment of the present invention;

fig. 3 is a perspective view of a base of a shielded radioactivity detecting apparatus in accordance with an exemplary embodiment of the present invention;

fig. 4 is a schematic perspective view of a housing of a shielded radioactivity detection device in accordance with an exemplary embodiment of the present invention;

fig. 5 is a schematic perspective view of an inner liner of a shielded radiation detection apparatus according to an exemplary embodiment of the present invention; and

fig. 6 is a perspective view of a liner cover of a shielded radiation detection apparatus according to an exemplary embodiment of the present invention.

Detailed Description

While the present invention will be fully described with reference to the accompanying drawings, which contain preferred embodiments of the invention, it is to be understood that those skilled in the art can, prior to this description, modify the embodiments described herein while obtaining the technical effects of the invention. Therefore, it should be understood that the foregoing description is a broad disclosure directed to persons of ordinary skill in the art, and is not intended to limit the exemplary embodiments of the invention described herein.

Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.

According to a general inventive concept of the present invention, there is provided a radioactivity detecting apparatus with a shielding member, comprising a housing, a base, and a radioactivity detector, wherein the radioactivity detector is located in a space enclosed by the housing and the base, a lining is disposed between an outer surface of the radioactivity detector and an inner surface of the housing, an outer circumferential surface of a first end of the lining is provided with the shielding member, the shielding member is formed with an opening in a circumferential direction thereof, the radioactivity detector receives radiation through the opening, an indication mark is disposed on the base, and the indication mark coincides with a projection of a position of the opening of the shielding member on a cross section of the lining, so as to determine a position of the opening of the shielding member through the indication mark.

Fig. 1 is an exploded schematic view of a shielded radioactivity detecting apparatus in accordance with an exemplary embodiment of the present invention; and fig. 2 is a cross-sectional view of a shielded radioactivity detecting apparatus according to an exemplary embodiment of the present invention.

According to some embodiments of the present invention, as shown in fig. 1 and 2, the shielded radioactivity detecting apparatus comprises a base 1, a housing 2, and a radioactivity detector 9. The housing 2 has a cylindrical shape, one end of which is closed and the other end of which is open. The base 1 may be mounted to the open end of the housing 2, for example by means of bolts 6. Thereby, the radioactivity detector 9 can be located in the space enclosed by the housing 2 and the base 1. The radiation detector 9 is used to detect the radioactive dose rate. In this exemplary embodiment, the radioactivity detector 9 may be a sodium iodide spectrometer for detecting the dose rate of gamma (γ) rays. In other embodiments, the radiation detector 9 may also be other types of detection apparatus for detecting the dose rate of other types of radiation. Between the outer surface of the radiation detector 9 and the inner surface of the housing 1, a lining 3 is arranged, which lining 3 can hold and constrain the radiation detector 9 in the housing 1. Furthermore, the liner 3 may also serve as a shock absorber, a heat insulator, etc. for the radioactivity detector 9. The outer circumferential surface of the first end of the inner lining 3 is provided with a shield 5, for example made of lead plate, to avoid that security equipment with e.g. nuclear radiation affects the proper functioning of the radiation detection equipment. The shield 5 is formed with an opening 51 in its circumferential direction, and the radiation detector 9 receives radiation through the opening 51. The base 1 is also provided with an indicator (in this embodiment, the indicator is a connector 8 or a connector mounting hole mounted on the base 1), which substantially coincides with a projection of the position of the opening 51 of the shield 5 on the cross section of the liner 3, so that the position of the opening 51 of the shield 5 is determined by the indicator. Here, the position of the opening 51 refers to a position of a center line of the opening 51.

According to the embodiment of the present invention, the working direction of the radioactivity detector 9 can be determined by providing an indication mark on the base 1, which substantially coincides with the projection of the position of the opening 51 of the shield 5 on the cross section of the lining 3, so as to determine the position of the opening 51 of the shield 5 by the indication mark. In this way, when installed, it is very easy to determine the working direction of the radioactive detector 9 and to direct the shield 5 toward the security inspection device with nuclear radiation to shield the radiation, thereby preventing the security inspection device with nuclear radiation from affecting the normal operation of the radioactive material monitoring device.

Fig. 3 is a perspective view of a base of a shielded radioactivity detecting apparatus according to an exemplary embodiment of the present invention. As shown in fig. 1, 2 and 3, the base 1 may include a base body 11 and a central boss portion 13 extending from the base body 11 into the inner cavity of the housing 2, the base body 11 may abut against the open end of the housing 2, and a plurality of first mounting holes 14 are provided on the base body 11 to detachably connect with the housing 2, for example, by bolts 6.

Fig. 4 is a perspective view of a housing of a shielded radioactivity detection device in accordance with an exemplary embodiment of the present invention. As shown in fig. 4, the open end of the housing 2 is provided with a mounting boss 21 extending radially outward, and a plurality of second mounting holes 22 are spaced on the mounting boss 21 for connecting with the base 1 by bolts 6.

Fig. 5 is a schematic perspective view of an inner liner of a shielded radiation detection apparatus according to an exemplary embodiment of the present invention. As shown in fig. 1, 3 and 5, a second end of the liner 3 opposite to the first end is provided with a first positioning portion 32, a central angle of the first positioning portion 32 corresponding to a projection of a position of the opening 51 of the shield 5 on the cross section of the liner 3 is a first central angle, the base 1 is provided with a second positioning portion 12 matched with the first positioning portion 32, a central angle of the indication mark corresponding to a projection of the second positioning portion 12 on the cross section of the liner 3 is a second central angle equal to the first central angle, so as to indicate the position of the opening 51 of the shield 5 by the indication mark. Here, the second central angle being equal to the first central angle means that the first central angle has the same magnitude and the same direction as the second central angle. Since the first central angle corresponding to the projection of the position of the first positioning portion 32 and the position of the opening 51 of the shielding member 5 on the cross section of the liner 3 is equal to the second central angle corresponding to the projection of the indication mark on the base 1 and the projection of the position of the opening 51 of the shielding member 5 on the cross section of the liner 3, the projection of the indication mark and the position of the opening 51 of the shielding member 5 on the cross section of the liner 3 are approximately overlapped, so that the position of the opening 51 of the shielding member 5 can be determined through the indication mark on the base 1, and the working direction of the radioactivity detector 9 can be determined.

In an exemplary embodiment, as shown in fig. 1, 3 and 5, the first positioning portion 32 is a positioning boss provided on an end face of the second end of the lining 3, the second positioning portion 12 is a positioning groove 12 provided on the central boss portion 13 and engaged with the positioning boss 32, and the positioning boss 32 is engaged with the positioning groove 12 to keep the positional relationship between the base 1 and the lining 3 fixed, so as to ensure that the projection of the position of the indication mark and the opening 51 of the shielding member 5 on the cross section of the lining 3 is always approximately coincident with each other at each installation. However, it should be noted that, in some other embodiments of the present invention, the first positioning portion 32 may also be a positioning groove provided on the end surface of the second end of the lining 3, and the second positioning portion 12 is a positioning boss provided on the central boss portion 13 and cooperating with the positioning groove. Further, the first positioning portion 32 may also be a groove provided on the outer circumferential wall of the second end of the liner 2, in which case the second positioning portion 12 is a projection extending from the central boss portion 13 into the groove.

In an exemplary embodiment, as shown in fig. 1, 3 and 5, the positioning boss is T-shaped, and the positioning groove corresponding to the positioning boss is also T-shaped. However, it should be noted that in other embodiments of the present invention, the positioning boss and the positioning groove may have other shapes, such as a U-shape.

In an exemplary embodiment, as shown in fig. 1 and 3, the second end of the liner 3 is provided with a hole 31 for passing a cable of the radioactivity detector 9, which is connected with an external power source via the interface 8 (in this embodiment, a connector, for example, including a socket mounted on the base 1 and a plug plugged into the socket, which is connected with the cable) to supply power to the radioactivity detector 9 through the external power source. The base 1 is provided with an interface mounting hole 16 adapted to mount the interface 8, the interface mounting hole 16 and/or the interface 8 may be used as an indicator, i.e. the location of the interface mounting hole 16 and the interface 8 and the opening 51 of the shield 5 are in the same orientation on the cross-section of the liner 3. This avoids the need to make additional indicators on the base 1, thereby saving manufacturing costs. In other embodiments, an indication mark may be additionally made on the base 1.

In an exemplary embodiment, as shown in fig. 1, the central angle of the opening 51 of the shielding element 5 is 90 °, however, it should be understood by those skilled in the art that the central angle of the opening 51 of the shielding element 5 may be other values, preferably 45 ° -135 °, in other embodiments of the present invention.

In an exemplary embodiment, as shown in fig. 1 and 2, the liner 3 has an inner hole to accommodate the radiation detector 9, and the shape of the inner hole is adapted to the outer contour of the radiation detector 9, so that the radiation detector 9 is mounted tightly and does not shake.

Fig. 6 is a perspective view of a liner cover of a shielded radiation detection apparatus according to an exemplary embodiment of the present invention. As shown in fig. 1, 2 and 6, the radioactivity detecting apparatus further comprises a lining cover 4, wherein the lining cover 4 comprises a lining cover body 41 and an annular boss 42 extending from the lining cover body 41 along a plane perpendicular to the lining cover body 41 so as to fill a gap between the top end of the radioactivity detector 9 and the lining 3. The radiation detector 9 is secured within an internal cavity in the housing 2 by means of a liner 3 and a liner cover 4, the liner 3 and the liner cover 4 being located between the inner surface of the housing 2 and the outer surface of the radiation detector 9. In particular, the liner cover 4 may be used when the diameter of the top end of the radiation detector 9 is smaller than the diameter of the middle portion, so that the gap between the top end of the radiation detector 9 and the liner 3 can be filled with the annular projection 42 of the liner cover 4, and the radiation detector 9 can be mounted firmly without shaking.

In an exemplary embodiment, as shown in fig. 1, 2 and 5, the first end of the liner 3 is provided with a groove 31 extending radially inward from the outer circumferential surface thereof, and the shield 5 is mounted in the groove 31 such that the surface of the shield 5 facing the housing 2 is flush with the outer surface of the liner 3, preventing a gap from occurring between the housing 2 and the shield 5 or between the housing 2 and the liner 3, thereby further improving the mounting stability of the radioactivity detector 9.

In an exemplary embodiment, as shown in fig. 1 and 3, the base 1 is further provided with a base mounting hole 15, for example, a bolt or the like for fixing the radioactivity detecting device in a working position.

In an exemplary embodiment, as shown in fig. 1 and 2, the radioactivity detecting apparatus further comprises a sealing ring 7, the sealing ring 7 being located between the housing 2 and the radial surface of the base 1. When the base 22 is connected to the housing 21, for example by means of the bolts 6, the sealing ring 7 is tightly clamped between the housing 2 and the base 1, so that a sealing action is produced. In an exemplary embodiment, the sealing ring 7 may be located between the housing 2 and the radial surface of the central boss portion 13. The base body 11 or the mounting boss 22 may include a groove on a radial surface thereof to receive the seal ring 7. When the base 1 is connected to the housing 2, the sealing ring 7 can be pressed in this groove by the housing 2 and the base 1, so that a sealing action is produced.

In one exemplary embodiment, as shown in fig. 1, 2 and 5, the inner liner 3 may be made of Ethylene Vinyl Acetate (EVA). In other embodiments, the liner 3 may also be made of other foams, such as polyvinyl chloride (PVC), Polystyrene (PS), Polyethylene (PE), phenolic resin (PF), Polyurethane (PUR), and the like.

In the exemplary embodiment, the housing 2 is cylindrical as shown in fig. 1 and 3, however, it should be understood by those skilled in the art that in other embodiments of the present invention, the housing 2 may be square or other shapes as desired, and the liner 3 may be square or other shapes as desired.

When the radioactivity detecting equipment with the shielding part is assembled, firstly, the shielding part 5 is fixed on the groove 31 of the lining 3, the socket of the connector is fixed in the interface mounting hole 15 of the base 1, the radioactivity detector 9 is placed in the lining 3, the lining cover 4 is plugged into the lining 3 and tightly presses the radioactivity detector 9, the cable of the radioactivity detector 9 can be connected with the socket of the connector through the plug of the connector, then the base 1 is laid flat, and the connector is positioned on the side opposite to the safety detecting equipment with nuclear radiation, so that the safety detecting equipment with the nuclear radiation is prevented from influencing the normal work of the radioactivity monitoring equipment; then, the liner 3 provided with the radioactive detector 9 is aligned with the base 1 and then placed on the base 1, finally, the sealing ring 7 is placed on the mounting surface of the base 1, the shell 2 is sleeved on the outer side of the liner 3, and the shell 2 and the base 1 are fixed through the bolts 6. When the radioactive detector 9 needs to be maintained or replaced, the bolt 6 is screwed off, the shell 2 is taken down, the plug connected with the cable of the radioactive detector 9 is disconnected from the socket, the lining cover 4 is taken down, and the radioactive detector 9 is taken out of the lining 3.

It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.

Having described preferred embodiments of the present invention in detail, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the appended claims, and the invention is not to be limited to the exemplary embodiments set forth in the specification.

Claims

1. The radioactivity detection equipment with the shielding piece is characterized by comprising a shell, a base and a radioactivity detector, wherein the radioactivity detector is located in a space enclosed by the shell and the base, a lining is arranged between the outer surface of the radioactivity detector and the inner surface of the shell, a shielding piece is arranged on the outer circumferential surface of the first end of the lining, an opening is formed in the shielding piece in the circumferential direction of the shielding piece, the radioactivity detector receives radiation through the opening, an indicating mark is arranged on the base, and the position of the indicating mark coincides with the projection of the opening of the shielding piece on the cross section of the lining, so that the position of the opening of the shielding piece is determined through the indicating mark.

2. The radioactivity detecting device according to claim 1, wherein a second end of the liner opposite to the first end is provided with a first positioning portion, a central angle of a position of the opening of the shielding member corresponding to a projection of the position of the first positioning portion on the cross section of the liner is a first central angle, the base is provided with a second positioning portion matched with the first positioning portion, a central angle of the indicator corresponding to a projection of the second positioning portion on the cross section of the liner is a second central angle, and the first central angle is equal to the second central angle.

3. The radioactivity detection apparatus of claim 2, wherein the base comprises a base body and a central boss portion extending from the base body into the interior cavity of the housing, the base body being removably coupled to the housing.

4. The radioactivity detection device of claim 3,

the first positioning part is a positioning boss arranged on the end face of the second end of the lining, and the second positioning part is a positioning groove arranged on the central boss part and matched with the positioning boss; or

The first positioning part is a positioning groove arranged on the end face of the second end of the lining, and the second positioning part is a positioning boss arranged on the central boss part and matched with the positioning groove.

5. The radioactivity detection apparatus of claim 4, wherein the positioning boss is T-shaped.

6. A radiation detection apparatus according to claim 1, wherein the second end of the inner liner is provided with a hole for a cable of the radiation detector to pass through, the cable being connected to an external power source via an interface, the base being provided with an interface mounting hole adapted to mount the interface, the interface mounting hole and/or the interface serving as the indicator.

7. The radioactivity detection apparatus of claim 1, wherein the opening corresponds to a central angle of 45 ° to 135 °.

8. A radiation detection apparatus according to claim 1, wherein the inner lining has an inner bore to accommodate the radiation detector, the inner bore being shaped to conform to an outer contour of the radiation detector.

9. The radioactivity detection apparatus of claim 1, further comprising a liner cap body and an annular boss extending from the liner cap body along a plane perpendicular to the liner cap body to fill a gap between the radioactivity detector tip and the liner.

10. A radiation detection apparatus according to claim 1, wherein the first end of the liner is provided with a recess extending radially inwardly from an outer circumferential surface thereof, the shield being mounted in the recess.

11. The radioactivity detection device of claim 1, wherein the shield is formed from lead plate.

12. The radioactivity detection apparatus of claim 1, wherein the base is further provided with base mounting holes to secure the radioactivity detection apparatus in an operating position.

13. The radioactivity detection device of any one of claims 1-12, further comprising a sealing ring positioned between the housing and a radial surface of the base.

14. The radioactivity detection device of claim 13, wherein the open end of the housing is provided with a radially outwardly extending mounting boss, and the sealing ring is positioned between the mounting boss and a radial surface of the mounting boss.

15. The radioactivity detection device of any one of claims 1-12, wherein the inner liner is made of Ethylene Vinyl Acetate (EVA).