CN212874075U - Ray shielding device capable of being opened quickly - Google Patents

Abstract

The utility model belongs to the radiation scanning imaging detection field, a ray shielding device capable of being opened rapidly is provided for a rapid through type ray inspection system, which comprises a ray shielding device (3), and is characterized in that the ray shielding device (3) is arranged on a ray shielding body (2), the ray shielding body (2) is arranged at the front end of a ray source (1) of the ray inspection system, and the ray shielding and the ray passing are rapidly switched through the movement of the ray shielding device (3); the lower part of the ray shielding body (2) is arranged on the main body frame (6). The ray shielding device capable of being opened quickly is small in size and simple in structure, safety protection of a driver passing through the inspection system is achieved, and image quality of the dual-energy inspection system is improved.

Description

Ray shielding device capable of being opened quickly

Technical Field

The utility model belongs to radiation scanning formation of image detection area relates to a ray shielding device that can open fast.

Background

In order to improve the safety inspection efficiency and reduce the occurrence of events such as smuggling, terrorist attacks and the like, vehicle safety radiographic inspection imaging equipment is installed in a plurality of customs, ports, logistics hubs and major activity places, and the perspective images of the detected objects are formed by means of X rays or gamma rays under the non-contact condition to realize the safety inspection of vehicles. Early radiographic imaging systems began scanning vehicle cargo after all personnel had been evacuated. In order to improve the security inspection efficiency and the development of the security inspection technology, manufacturers of security inspection equipment begin to produce direct pass-through security inspection equipment for driving trucks. The device has the advantages that the detection efficiency is high, and a driver does not need to get off to avoid. However, the problem is that the driver is exposed to a large dose of radiation, as by passing directly between the source and detector, and the driver may pass more than once a day, causing injury to the person. Therefore, the method of 'head avoidance' is mostly adopted at present, namely, the cab is judged to pass through the main beam and then 'beam opening' scanning is carried out, and image acquisition is carried out.

The 'head avoidance' generally has two modes of automatic mode and fixed mode. The automatic avoiding mode is to judge that the head (cab) passes through and then the detected part passes through the main ray beam by various photoelectric sensors and then to open the beam for scanning so as to ensure the health of a driver. However, the vehicle models produced and used in various countries have various doors, so that the field vehicle speed cannot be determined, and the judgment is often inaccurate. Therefore, a fixed avoidance mode is mostly adopted. Namely, the length of a maximum avoidance headstock without beam opening is manually set, for example, 3.0 meters, and then beam opening is carried out for scanning. However, when the length of the vehicle head is small, such as 1.5 meters, and the distance between the vehicle head and the detected part is very small (dozens of centimeters), the front end of the vehicle body of a part of the detected part is missed, and dead corners of security inspection are caused. And because the radiation dose can be increased to an ideal value after the radiation source is stable after emitting beams, the penetration force of the front-end detected part is insufficient due to the unstable energy of the radiation. Therefore, the method needs to scan to obtain a complete and clear cargo image and can protect a driver from the influence of radiation and scattering dose to the maximum extent, and the method becomes a problem to be solved at present.

In the current container detection system, the used X-ray is generally high-low dual-energy ray, and according to the difference of the penetration characteristics, the high-energy level ray of the dual-energy X-ray sometimes needs to filter out the low-energy component to improve the imaging quality. A special mechanism is required to alternate the selection of X-rays of different energies, i.e. to filter out the radiation components of medium and low energy in e.g. a high energy state, while allowing low energy X-ray emission in another state.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned technical problem that exists among the prior art, the utility model provides a ray shielding device that can open fast can realize ray "shield with open" between the fast switch-over, the high filtration of ray shielding main part lead block goes out low-energy ray and does not influence the passing through of high-energy ray, also promptly switches rapidly between ray "high energy and high-low hybrid energy" two kinds of states. The safety problem that a driver directly passes through the ray inspection system is solved, and the double-energy ray inspection system can be used for switching between a high-energy state and a high-low mixed energy state, so that the image quality of the double-energy ray inspection system is improved.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that:

a ray shielding device capable of being opened quickly is used for a quick through type ray inspection system and comprises a ray shielding device, wherein the ray shielding device is arranged on a ray shielding body, the ray shielding body is arranged at the front end of a ray source of the ray inspection system, and the ray shielding body moves through the ray shielding device to realize quick switching between ray shielding and ray passing; the lower part of the ray shielding body is arranged on the main body frame.

Preferably, the ray shield comprises an upper shield, a middle connecting plate and a lower shield, and the upper shield, the middle connecting plate and the lower shield are fixed together through bolts; the upper part of the ray shielding device is in clearance fit with the upper shielding body; the lower part of the ray shielding device is arranged on the lower shielding body.

Preferably, the ray shielding device comprises a ray shielding main body and a driving device, wherein the driving device is installed on one side of the ray shielding main body, and the ray shielding main body consists of a lead block and a steel welding structure connected with the lead block; the steel welded structure upper portion is for being used for the steel sheet of falling L of fixed lead, and the steel welded structure middle part is the steel sheet of reserving the gap, and the steel welded structure lower part forms a trough-shaped structure for two vertical steel sheets of below welding at the steel sheet, and this trough-shaped structure is used for fixed cooperation drive arrangement, welds two horizontal steel sheets that play the supporting additional strengthening in the trough-shaped structure.

Preferably, the driving device comprises a driving unit, a rotating shaft, a cam mechanism and a bearing seat, wherein the rotating shaft is assembled on the driving unit, the cam mechanism and the bearing seat are sleeved on the rotating shaft, the bearing seat is fixed at the end part of the ray shielding body, the cam mechanism is in tangent state fit with the inner surfaces of two transverse steel plates of a groove-shaped structure at the lower part of the steel welding structure when the ray shielding body passes through the ray shielding body and/or the ray, the driving unit drives the cam mechanism to rotate to drive the ray shielding body to move back and forth in the horizontal direction, and when the cam mechanism is at the limit position of the ray shielding body, the cam mechanism rotates 180 degrees to be the limit position of the ray passing state.

Preferably, the length of the cam mechanism is matched with the length of two vertical steel plates at the lower part of the steel welding structure.

Preferably, the lead of the radiation shielding body is formed by stacking a plurality of lead blocks with different thicknesses.

Preferably, the drive unit is a hydraulic motor, a pneumatic motor, a stepper motor or a servo motor providing rotational drive.

Preferably, a control system is installed in the main body frame; the two ends of the inner side of the main body frame are provided with a plurality of detectors, and the lower part of the inner side of the main body frame is also provided with a detector for receiving rays and imaging; the collimator located at the lower part of the ray shield is installed on the main body frame, so that useful rays pass through the reserved gap in the middle of the steel welded structure and are shielded from excessive rays.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses not only solved the driver and directly passed through ray inspection system's safety problem, also realized the switching between dual energy ray inspection system "high energy and high-low hybrid energy" two kinds of states moreover. The quick-opening ray shielding device is simple and compact in structure, convenient to process and free of changing the structure of an original ray inspection system.

Drawings

Fig. 1 is a schematic structural view of the ray shielding device capable of being opened rapidly according to the present invention;

FIG. 2 is a view of the present invention taken along line A of FIG. 1;

FIG. 3 is a view of the ray shielding state and cam mechanism position of FIG. 1 in the direction A of the present invention;

FIG. 4 is a view of the ray passage and cam mechanism position of FIG. 1 taken along direction A in accordance with the present invention;

fig. 5 is a schematic view of the ray inspection system of the present invention.

Description of reference numerals: 1-a radiation source; 2-a radiation shield; 21-an upper shield; 22-intermediate connection plate; 23-a lower shield; 3-a radiation shielding device; 31-a radiation shielding body; 311-lead block; 312-steel welded construction; 32-a drive device; 321-a drive unit; 322-a rotating shaft; 323-cam mechanism; 324-a bearing seat; 4-a collimator; 5-a detector; 6-a body frame; 7-a control system; 701-a first photosensor; 702-a second photosensor.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

Referring to fig. 1 and 2, the utility model provides a ray shielding device capable of being opened rapidly, which is used for a rapid through type ray inspection system, and comprises a ray shielding device 3, wherein the ray shielding device 3 is arranged on a ray shielding body 2, the ray shielding body 2 is arranged at the front end of a ray source 1 of the ray inspection system, and the ray shielding and the ray passing are switched rapidly through the movement of the ray shielding device 3; the lower portion of the radiation shield 2 is mounted on the main body frame 6.

The ray shield 2 comprises an upper shield 21, a middle connecting plate 22 and a lower shield 23, wherein the upper shield 21, the middle connecting plate 22 and the lower shield 23 are fixed together through bolts; the upper part of the ray shielding device 3 is in clearance fit with the upper shielding body 21; the lower part of the radiation shielding device 3 is mounted on a lower shield 23.

The ray shielding device 3 comprises a ray shielding main body 31 and a driving device 32, wherein the driving device 32 is installed on one side of the ray shielding main body 31, and the ray shielding main body 31 consists of a lead block 311 and a steel welding structure 312 connected with the lead block; the lead block 311 of the radiation shielding body 31 is formed by overlapping a plurality of lead blocks with different thicknesses to absorb radiation, and the total height of the lead blocks can be increased and decreased according to different requirements. The upper part of the steel welding structure 312 is an inverted L-shaped steel plate for fixing a lead block; the middle part of the steel welding structure is a steel plate with a reserved gap, the gap is used as a ray channel, and the width of the gap is about 4-6 mm; the lower part of the steel welding structure is a groove-shaped structure formed by welding two vertical steel plates below the steel plates, two transverse steel plates which play a role in supporting and reinforcing are welded in the groove-shaped structure, and the groove-shaped structure is used for fixing and matching the driving device 32.

As shown in fig. 3 and 4, the driving device 32 includes a driving unit 321, a rotating shaft 322, a cam mechanism 323, and a bearing seat 324, wherein the driving unit 321 is a hydraulic motor, a pneumatic motor, a stepping motor, or a servo motor providing rotational driving. The driving unit 321 is provided with a rotating shaft 322, the rotating shaft 322 is provided with a cam mechanism 323 and a bearing seat 324 in a sleeved mode, the bearing seat 324 is fixed at the end portion of the ray shielding body 2, the cam mechanism 323 is matched with the inner surfaces of two transverse steel plates of a groove-shaped structure at the lower portion of the steel welding structure 312 in a tangent mode when the ray shielding and the ray pass, the driving unit 321 drives the cam mechanism 323 to rotate to drive the ray shielding main body 31 to reciprocate in the horizontal direction, and when the cam mechanism 323 is located at the limit position of the ray shielding, the cam mechanism 323 rotates 180 degrees to be the limit position of the ray pass state.

Preferably, the cam mechanism 323 is tangent to the inner sides of the two transverse steel plates of the lower trough-like structure of the welded steel structure 312 when rotated 180 ° in the two extreme positions. The length of the cam mechanism 323 is matched with the length of the two vertical steel plates at the lower part of the steel welding structure 312.

The ray shielding device 3 can also be used for a dual-energy ray inspection system, and the rapid switching between the ray high-energy state and the ray opening state is realized through the rapid switching between the ray shielding state and the ray opening state of the ray shielding device 3, so that the image quality of the dual-energy ray inspection system is improved.

The first implementation mode comprises the following steps: the utility model is used for boxcar or container and the small-size vehicle trunk of quick through-type detecting system detect. The specific implementation is as follows: as shown in fig. 3, when the inspection system is not passing by, the radiation source 1 is in a closed state and the radiation shielding device 3 is also in a radiation shielding state. As shown in fig. 5, when the driver drives the vehicle to pass through the front end of the radiographic inspection system, the barrier gate system is first released, and then the vehicle enters the inspection lane. A control system 7 is arranged in the main body frame 6; a plurality of detectors 5 are arranged at two end parts of the inner side of the main body frame 6, and the detectors 5 are also arranged at the lower part of the inner side of the main body frame 6 and used for receiving rays and imaging; the collimator 4 positioned at the lower part of the ray shielding body 2 is arranged on the main body frame 6, so that useful rays pass through a reserved gap in the middle of the steel welding structure and redundant rays are shielded; when the first photosensor 701 of the control system 7 installed in the main body frame 6 detects a signal and transmits the signal to the control system 7, the control system 7 immediately turns on the radiation source 1 and starts emitting radiation. When the driver continues to drive normally forward, when the second photoelectric sensor 702 detects a signal and sends the signal to the control system 7, the control system 7 immediately starts the ray shielding device 3, the driving unit 321 of the driving device 32 drives the cam mechanism 323 to rotate 180 degrees to switch from the ray shielding state to the ray passing state as shown in fig. 3 to 4, namely, the ray is switched from the ray shielding state to the ray passing state, the ray also reaches the normal beam output level, the ray with enough dose passes through the collimator 4 to scan the part to be detected of the vehicle, and the detector 5 receives the ray and forms an image. Because the moving distance of the ray shielding main body 31 only needs 10-20mm, the opening time of the ray shielding device 3 is about 0.1s, the driver is protected from the ray radiation to the maximum extent, and the clear image of a complete carriage, a container or a trunk is also ensured to be scanned.

The second embodiment: the utility model is used for dual energy ray inspection system concrete implementation as follows. The frequency of switching between the high energy and the high-low mixing energy of the radiation shielding device 3 is first set as required. The radiation source 1 is turned on and emits radiation, and when the radiation reaches a steady state, the radiation shielding device 3 is turned on again, the driving unit 321 of the driving device 32 drives the cam mechanism 323 to rotate 180 degrees to switch from the state shown in fig. 3 to the state shown in fig. 4, namely, the radiation is switched from the shielding state to the opening state, namely, the radiation is switched from the pure high-energy state to the high-energy and low-energy mixed state, and the radiation inspection system starts to scan the vehicle or the cargo. Therefore, by switching, low-energy rays are filtered when pure high energy is needed, and the purpose of improving the imaging quality is achieved.

The utility model discloses a drive ray shield assembly makes ray "shield and can switch rapidly between" two kinds of states, and ray energy is unchangeable when opening bundle scanning, nevertheless pierces through the in-process ray radiation dose of car head portion and shields the degree that the human body can be accepted, and satisfies the requirement of the high penetrating power of safety inspection and definition again to the partial ray radiation dose of quilt survey goods, provides complete, clear scanned image simultaneously again, has overcome the safety inspection hidden danger.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the application as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims (8)

1. A ray shielding device capable of being opened quickly is used for a quick pass-through ray inspection system and comprises a ray shielding device (3) and is characterized in that the ray shielding device (3) is arranged on a ray shielding body (2), the ray shielding body (2) is arranged at the front end of a ray source (1) of the ray inspection system, and the ray shielding body (3) moves to realize quick switching between ray shielding and ray passing; the lower part of the ray shielding body (2) is arranged on the main body frame (6).

2. A radiation-shielding device capable of being opened quickly according to claim 1, wherein the radiation-shielding body (2) comprises an upper shielding body (21), a lower shielding body (23) and an intermediate connecting plate (22), the upper shielding body (21), the intermediate connecting plate (22) and the lower shielding body (23) are fixed together by bolts; the upper part of the ray shielding device (3) is in clearance fit with the upper shielding body (21), and the lower part of the ray shielding device (3) is arranged on the lower shielding body (23).

3. A radiation-shielding device capable of being opened quickly according to claim 1, wherein the radiation-shielding device (3) comprises a radiation-shielding main body (31) and a driving device (32), and the driving device (32) is installed on one side of the radiation-shielding main body (31); the ray shielding main body (31) consists of a lead block (311) and a steel welding structure (312) connected with the lead block; steel welded structure (312) upper portion is for being used for the steel sheet of falling L of fixed lead, and the steel sheet of middle part for reserving the gap, and the lower part forms a groove-shaped structure for two vertical steel sheets of below welding at the steel sheet, and this groove-shaped structure is used for fixed cooperation drive arrangement (32), welds two horizontal steel sheets that play the supporting additional strengthening in groove-shaped structure.

4. A radiation-shielding device capable of being opened quickly according to claim 3, characterized in that said lead (311) is composed of a plurality of lead blocks stacked one on top of the other.

5. A radiation shielding device capable of being opened rapidly according to claim 3, wherein the driving device (32) comprises a driving unit (321), a rotating shaft (322), a cam mechanism (323) and a bearing seat (324), the rotating shaft (322) is assembled on the driving unit (321), the cam mechanism (323) and the bearing seat (324) are sleeved on the rotating shaft (322), the bearing seat (324) is fixed at the end of the radiation shielding body (2), the cam mechanism (323) is tangent to the inner surface of the lower groove-shaped structure of the steel welding structure (312) when the radiation shielding and/or the radiation passes through, the driving unit (321) drives the cam mechanism (323) to rotate to drive the radiation shielding body (31) to reciprocate in the horizontal direction, when the cam mechanism (323) is at the limit position of the radiation shielding, the cam mechanism (323) rotates 180 degrees to be a limit position of a ray passing state.

6. A quickly openable radiation-shielding device according to claim 5, wherein the length of the cam mechanism (323) is matched to the length of the two vertical steel plates below the welded steel structure (312).

7. A radiation shielding device capable of being opened quickly according to claim 5, wherein the driving unit (321) is a hydraulic motor, a pneumatic motor, a stepper motor or a servo motor providing rotational drive.

8. A radiation-shielding device capable of being opened quickly according to claim 1, characterized in that a control system (7) is installed in the main body frame (6); a plurality of detectors (5) are arranged at two end parts of the inner side of the main body frame (6), and the detectors (5) are also arranged at the lower part of the inner side of the main body frame (6) and are used for receiving rays and imaging; the collimator (4) at the lower part of the ray shield (2) is mounted on the main body frame (6) to make the useful ray pass through the reserved gap in the middle of the steel welding structure.

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