CN102798880B - Device and method for detecting leakage dose rate of X-ray security detection equipment - Google Patents

Abstract

The invention discloses a device and an inspection method for inspecting the leakage dose rate of X-ray safety inspection equipment. The leakage radiation dose rate inspection device includes a radiation detection and alarm host, five radiation detection probes and a fixed radiation detection probe. A dedicated positioning bracket, the radiation detection and alarm host is provided with a radiation detection and alarm probe connection inlet, and the radiation detection and alarm probe is connected to the radiation detection and alarm host through a connection. The radiation detection and alarm host of the inspection device of the present invention can simultaneously display the detection results of five radiation detection probes, and the alarm thresholds of each radiation detection probe can be set separately; when an over-limit alarm occurs, the radiation detection and alarm host should clearly display the alarm probe number, Leaked radiation dose rate information is actually measured; the inspection method of the present invention has the advantages of reasonable setting of measurement points, superior synchronous measurement performance, scientific and safe inspection methods, and high accuracy of inspection results.

Description

Device and inspection method for X-ray safety inspection equipment leakage dose rate inspection

technical field

The invention relates to a detection device for X-ray leakage dose rate, in particular to a device and a detection method for X-ray safety inspection equipment leakage dose rate detection.

Background technique

With the large-scale application of micro-dose X-ray safety inspection equipment, the radiation safety performance of X-ray safety inspection equipment, especially its leakage radiation dose rate index, has attracted great attention from relevant management departments and the general public. The technical requirements of GB15208 on the leakage radiation dose rate of X-ray safety inspection equipment are "at any place 5cm away from the outer surface of the equipment (including the entrance and exit of the equipment), the X-ray leakage dose rate should be less than 5μGy/h". In practical applications, relevant management departments put forward higher radiation safety requirements.

At present, the instruments used for X-ray safety inspection equipment leakage dose rate inspection are generally composed of a radiation detection alarm host and a single-channel radiation detection alarm probe. During the measurement, the position of the radiation detection probe needs to be manually fixed, resulting in the inspection staff having to stay in close range for a long time. Exposure to X-ray safety inspection equipment at work will increase the cumulative dose of radiation received by inspection staff and affect their health.

In addition, the leakage radiation dose rate detection device of the existing X-ray safety inspection equipment is generally a single-channel radiation detection probe, and the inspection results of different inspection points of the same inspected equipment are obtained in different sequences of tests, which affects the inspection result data. At the same time, if you want to obtain the test results of the leakage radiation dose rate at 5 points, you must repeat the test 5 times, which also greatly affects the test work efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to provide a device and inspection method for X-ray safety inspection equipment leakage dose rate inspection with simple structure, high measurement accuracy and strong safety performance.

To achieve the above object, the technical scheme of the present invention is as follows:

Devices for X-ray safety inspection equipment leakage dose rate inspection, including

A radiation detection and alarm host, the radiation detection and alarm host is provided with at least 5 radiation detection and alarm probe connection inlets;

5 radiation detection and alarm probes, the radiation detection and alarm probes are connected to the connection line inlet on the radiation detection and alarm host through a connection;

A positioning bracket for fixing the radiation detection alarm probe;

The positioning bracket includes

A mounting seat arranged in the middle of the top surface of the radiation detection and alarm host, and a probe fixing frame is arranged in the mounting seat;

4 brackets that are turned over and placed on the mounting base and used to install the radiation detection alarm probe; the 4 brackets are symmetrically arranged in a cross shape;

The support includes freely stretchable legs and a probe fixing frame arranged at one end of the legs;

The radiation detection alarm probe is arranged in the probe fixing frame.

In one embodiment of the present invention, the radiation detection and alarm probe is a multi-channel split type high-sensitivity dose rate meter with a measuring range not greater than 200 μSv/h.

In one embodiment of the present invention, the probe fixing frame is connected to one end of the leg through a detachable metal buckle.

In one embodiment of the present invention, the metal buckle is composed of a fixed block fixed at one end of the leg, an L-shaped connecting piece placed under the fixed block, and a triangular connecting piece placed under the L-shaped connecting piece; One end of the L-shaped connector is a closed end, and the other end is an open end, and the open end of the L-shaped connector is limited by a locking block.

An inspection method for a device used for X-ray safety inspection equipment leakage dose rate inspection, the inspection method includes the following steps:

(1) Select 5 radiation detection and alarm probes and fix them in the probe fixing frame respectively, and then connect the radiation detection and alarm probes to the access ports on the radiation detection and alarm host through wiring;

(2) Place the positioning bracket with the radiation detection probe installed on the top surface of the inspected X-ray safety inspection equipment; confirm that the mounting seat of the positioning bracket and the radiation detection probe in the mounting seat are in the center of the top surface of the inspected X-ray safety inspection equipment point, adjust the four cross-shaped brackets so that the other four radiation detection probes are respectively located at the center point of the luggage entrance, the center point of the luggage exit, and the center point of the two sides of the equipment host of the X-ray security inspection equipment to be inspected.

(3) Turn on the power of the radiation detection alarm host, confirm the detection point corresponding to the radiation detection probe, and set the alarm threshold and radiation detection refresh time of the corresponding point respectively;

(4) Start the inspected X-ray security inspection equipment, put a 700mm×500mm×300mm wooden simulated luggage package on the security inspection channel of the inspected X-ray security inspection equipment, when the simulated luggage package enters the inspected X-ray security inspection equipment When the X-ray safety inspection equipment under inspection emits X-rays, the 5 radiation detection alarm probes simultaneously read the corresponding leaked X-ray dose rate values; When an alarm is issued, the radiation detection alarm host should be able to clearly display the location of the alarm probe and the corresponding measured radiation dose rate information;

(5) In this test method, the alarm thresholds of the five probes can be uniformly set to 5μGy/h in accordance with the requirements of GB15208; they can also be set independently according to specific testing requirements, such as setting the alarm at the central point of luggage import and luggage export The threshold value is 5μGy/h, and the alarm threshold value of the center point on both sides and the top surface center point shall not exceed 0.5μGy/h. If the actual detection result exceeds the preset alarm threshold value, the radiation detection alarm host will send out an audible and visual alarm signal. At this time It can be determined that the radiation safety index of the corresponding point is unqualified.

Through above-mentioned technical scheme, beneficial effect of the present invention is:

The invention uses a positioning bracket to fix the radiation detection and alarm probe. Compared with the existing manual fixing method, it has the advantages of convenient installation and disassembly, high safety performance, and the like.

The inspection device of the present invention works synchronously with 5 radiation detection probes, and the radiation detection alarm host receives the detection results of 5 probes at the same time, and at the same time, the alarm thresholds of the 5 probes can be set separately; it effectively solves the comparability of multi-point data It also enables the inspection device to meet the inspection work in accordance with various technical requirements.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the positioning bracket of the present invention;

Fig. 3 is a schematic diagram of the stent structure of the present invention;

Fig. 4 is a working principle diagram of the present invention.

The corresponding part names indicated by numbers and letters in the figure:

100. Radiation detection alarm host 110. Connection inlet 200. Positioning bracket 210. Mounting base 211. Pin base 220. Probe fixing frame 221. Cover plate 230. Outrigger 231. Pin shaft 300. Radiation detection alarm probe 310. Line 400, bracket 511, fixed block body 511a, threaded hole 512, connecting ring 512a, through hole 520, L-shaped connector 521, closed end 522, open end 530, triangular connector 540, clamping block 600, X-ray to be inspected Security Check Equipment

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

Referring to FIGS. 1 to 4 , the device for X-ray safety inspection equipment leakage dose rate inspection of the present invention includes a radiation detection and alarm host 100 , a positioning bracket 200 and five radiation detection and alarm probes 300 .

The radiation detection and alarm host 100 of the present invention is basically the same as the existing radiation detection and alarm host. , the five radiation detection and alarm probes 300 are respectively connected to the connection line inlet 110 on the radiation detection and alarm host 100 through connection lines 310 .

The positioning bracket 200 of the present invention is used to replace the fixed radiation detection and alarm probe 300 by hand during use. The positioning bracket 200 is composed of a mounting base 210 placed in the middle of the top surface of the radiation detection alarm host 10 and a rotatable mounting base 210. And it is composed of four brackets 400 for installing the radiation detection alarm probe 300, and the four brackets 400 are arranged symmetrically in a cross shape.

The mounting base 210 of the present invention is provided with a probe fixing frame 220, and the probe fixing frame 220 is used to install the radiation detection and alarm probe 300. The radiation detection and alarm probe 300 of the present invention is a multi-channel split type high-sensitivity dose rate meter with a measuring range not greater than 200Sv/h , the radiation detection alarm probe 300 has high sensitivity and low cost.

The bracket 400 of the present invention includes a freely stretchable leg 230 and a probe fixing frame 220 arranged at one end of the leg 230. When one end of the leg 230 is connected to the probe fixing frame 220, it is connected by a metal buckle 500; the metal buckle 500 is a Detachable structure; the legs 230 can be retracted back and forth during use to change the position of the radiation detection alarm probe 300 .

The metal buckle 500 is made up of a fixed block fixed on one end of the supporting leg 230, an L-shaped connecting piece 520 placed under the fixed block, and a triangular connecting piece 530 placed under the L-shaped connecting piece 520; one end of the L-shaped connecting piece 520 is The closed end 521 and the other end is an open end 522 , and the open end 522 of the L-shaped connector 520 is limited by the locking block 540 .

The fixed block is composed of a fixed block body 511 nested at one end of the leg 230 and a connecting ring 512 placed under the fixed block body 511. The upper part of the fixed block body 511 is provided with a threaded hole 511a, which can be fixed by simply inserting a screw during installation. The middle part of the connection ring 512 is provided with a through hole 512a. When installing, the open end 522 of the L-shaped connector 520 passes through the through hole 512a, and the closed end 521 of the connector 520 is suspended in the through hole 512a of the connection ring 512; The triangular connecting piece 530 is placed on the open end 522 of the L-shaped connecting piece 520, and the open end 522 of the L-shaped connecting piece 520 limits the triangular connecting piece 530 through the block 540, thereby preventing the triangular connecting piece 530 from moving from the L-shaped connecting piece 520. The open end 522 slides out.

The lower end of each triangular connector 530 of the present invention is connected with a probe fixing frame 220, and one end of the probe fixing frame 220 is the installation port of the radiation detection alarm probe 300, which needs to be fixed by the cover plate 221 after the radiation detection alarm probe 300 is installed, thereby Improve the stability when the radiation detection alarm probe 300 is installed.

Mounting seat 210 of the present invention is provided with 4 pin seats 211, and the other end of support leg 230 of the present invention is provided with pin shaft 231, and it only needs to fix pin shaft 231 on pin seat 211 when installing and gets final product, when not in use , the bracket 400 can be turned around the mounting base 210 and merged together for easy access.

Inspection method of the present invention comprises the steps:

(1) First select five radiation detection and alarm probes 300, and respectively fix them in the probe fixing frame 220, and then connect the radiation detection and alarm probes 300 to the access ports on the radiation detection and alarm host 100 through wiring;

(2) Place the positioning bracket 200 with the radiation detection probe 300 installed on the top surface of the inspected X-ray safety inspection equipment 600; confirm that the mounting seat 210 of the positioning bracket 200 and the radiation detection probe 300 in the mounting seat 210 are in the position of the X-ray under inspection. At the center point of the top surface of the X-ray safety inspection equipment 600, adjust the four brackets 400 arranged in a cross shape so that the other four radiation detection probes 300 are respectively located at the center point of the luggage entrance, the center point of the luggage exit, and the equipment 5cm above the center point of both sides of the host;

(3) Turn on the power of the radiation detection alarm host 100, confirm the detection points corresponding to the radiation detection probe 300, and set the alarm threshold and radiation detection refresh time of the corresponding points respectively;

(4) Start the inspected X-ray security inspection equipment 600, put a 700mm×500mm×300mm wooden simulated luggage package on the security inspection channel of the inspected X-ray security inspection equipment 600, when the simulated luggage package enters the inspected X-ray security inspection When inside the equipment 600, the inspected X-ray safety inspection equipment 600 emits X-rays, and the five radiation detection alarm probes 300 simultaneously read the corresponding leaked X-ray dose rate values; the radiation detection alarm host 100 simultaneously displays the five radiation detection alarm probes 300 When an over-limit alarm occurs, the radiation detection alarm host 100 should be able to clearly display the position of the alarm probe and the corresponding measured radiation dose rate information;

(5) In this test method, the alarm thresholds of the five probes can be uniformly set to 5μGy/h in accordance with the requirements of GB15208; they can also be set independently according to specific testing requirements, such as setting the alarm at the central point of luggage import and luggage export The threshold is 5μGy/h, and the alarm threshold of the center point on both sides and the top surface is 0.5μGy/h. If the actual detection result exceeds the preset alarm threshold, the radiation detection alarm host will send out an audible and visual alarm signal, and it can be judged at this time The radiation safety index of the corresponding point is unqualified.

For individual inspected X-ray safety inspection equipment with large volume and seam design in the shell, add two mandatory measurement points on both sides and top surface of the inspected X-ray safety inspection equipment, and install 6 points on the fixed bracket. The maximum value of the X-ray dose rate measured by the 6 radiation detection alarm probes shall not exceed 0.5 μGy/h, otherwise it will be judged as unqualified, and the radiation detection alarm probe will send out an audible and visual alarm signal.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (3)

1., for the device of X-ray safety check equipment leakage agent dose rate inspection, it is characterized in that: comprise

One radiation detection alarm host machine, described radiation detection alarm host machine is provided with at least 5 radiation detection alarm probe line access ports;

5 radiation detection alarm probe, described radiation detection alarm probe is connected with the line access port in radiation detection alarm host machine by line;

One for the locating support of fixing radiation detection alarm probe;

Described locating support comprises

One is placed in the mount pad in the middle part of radiation detection alarm host machine end face, is provided with a probe fixed frame in described mount pad;

Being placed on mount pad and 4 supports for installing radiation detection alarm probe of upset; Described 4 supports are symmetrical arranged across;

Described 4 supports comprise the supporting leg freely stretched and the probe fixed frame being placed in supporting leg one end respectively, the probe fixed frame being placed in supporting leg one end is connected with one end of supporting leg by a Demountable metallic hasp, described metal buckle by being fixed on the fixed block of supporting leg one end, the L shape web member be placed under fixed block, the triangle web member be placed under L shape web member form; One end of described L shape web member is blind end, the other end is openend, and described L shape web member openend is spacing by fixture block;

Described radiation detection alarm probe is placed in probe fixed frame.

2. the device for the inspection of X-ray safety check equipment leakage agent dose rate according to claim 1, is characterized in that: described radiation detection alarm probe is the split type high sensitivity dose rate instrument of multichannel that range is not more than 200 μ Sv/h.

3. the method for inspection for X-ray safety check equipment leakage agent dose rate verifying attachment according to claim 1, is characterized in that comprising the steps:

(1) choose 5 radiation detection alarm probe, and be separately fixed in probe fixed frame, then by wiring, radiation detection alarm probe is connected with the access port in radiation detection alarm host machine;

(2) locating support installing radiation detection probe is positioned over tested X-ray safety check equipment end face; Confirm that the radiation detection probe in the mount pad of locating support and this mount pad is in tested X-ray safety check equipment end face central point, adjust 5cm place above central point that support that 4 across arrange makes wherein 2 probes in another four radiation detection probe be in import and outlet, other 2 probes are in 5cm place above center side point;

(3) open radiation detection alarm host machine power supply, confirm to arrange alarm threshold value and the radiation detection refresh time of respective point position respectively in the check point position that radiation detection probe is corresponding;

(4) tested X-ray safety check equipment is started, the security check passage of tested X-ray safety check equipment is put into the wooden simulation luggage parcel of 700mm × 500mm × 300mm, when simulating luggage parcel and entering in tested X-ray safety check equipment, tested X-ray safety check equipment sends X ray, and 5 radiation detection alarm probe read corresponding leakage x-ray dose rate value simultaneously; Radiation detection alarm host machine shows the testing result of 5 radiation detection alarm probe simultaneously, and when there is overload alarm, radiation detection alarm host machine should specify display alarm probe positions and corresponding actual measurement radiation dose rate information;

(5), in this method of inspection, the alarm threshold value of five probes can be set as 5 μ Gy/h according to will seeking unification of GB15208; Also independently can arrange according to concrete testing requirement, arrange luggage import central point, the alarm threshold value of luggage export center point is 5 μ Gy/h, two sides central point and end face central point alarm threshold value must not be more than 0.5 μ Gy/h; As actual testing result exceeds the alarm threshold value preset, namely radiation detection alarm host machine sends sound and light alarm signal.