CN205262812U - Darkroom formula security installations - Google Patents

Abstract

The utility model provides a darkroom formula security installations. Darkroom formula security installations includes casing and the inside part of casing that constitutes inclosed darkroom, and the inside part of casing includes: sampling system, sampling system include conveyer, detect the sample collection device of being examined the X ray detection device of the position of object and being used for gathering the sample, and wherein X ray detection device is used for confirming being examined the relevant position of object in reacing sampling system to to examine object conveying to the position of hopeing together with conveyer, sample processing system, wherein, sampling system, sample processing system and sample test system pass through the connecting piece intercommunication. The utility model discloses a security installations can make things convenient for, fast, effectively the sample circuit detect, the bale breaking does not destroy quarantine objects article, is suitable for the quick examination detection to prohibited articles such as airport, customs.

Description

Darkroom Security Inspection Equipment

technical field

The utility model relates to the field of safety detection, in particular to darkroom luggage safety detection equipment based on IMS and its combination technology.

Background technique

In today's society where science and technology are changing with each passing day and economic globalization continues to deepen, social problems such as terrorist attacks, food safety, medical and health safety, and drug smuggling have seriously affected and threatened people's lives, property, and health and safety. In order to maintain normal social order and protect the lives, property, health and safety of the people, detection technologies and related equipment based on various detection principles have sprung up like mushrooms in recent years.

Among them, ion mobility spectrometry (IMS) technology is widely used in the detection or monitoring of chemical warfare agents, drugs, explosives, and the environment because of its simple structure, high sensitivity, and fast analysis speed.

Due to the superior performance of IMS, various devices based on IMS technology and its combination technology have gradually emerged in the detection fields of food, cosmetics, medicine and health. Gas chromatography-ion mobility spectrometry (GC-IMS) combined technology makes full use of the outstanding separation characteristics of GC and the advantages of fast response and high sensitivity of IMS. Cross-sensitivity (crosssensitivity) problem, and can also obtain the chromatographic retention time, the drift time of the analyte ion in the transfer tube and the signal intensity of the analyte finally induced on the Faraday disk, so as to obtain the three-dimensional of the analyte Spectrum information can effectively and accurately distinguish samples with complex components. GC-IMS detection technology will play a powerful role in anti-terrorism and anti-riot, drug smuggling, environmental monitoring, food safety, medical and health supervision and other fields in the future.

However, the traditional IMS and its combined equipment mainly include handheld, portable, desktop and door-type methods, which are inconvenient for sampling in practical applications, resulting in low detection efficiency; or the need to destroy the detected object; Object, which needs to be unpacked, which is very inconvenient.

It is expected that the products of IMS or its combined equipment can collect samples with high efficiency and fast collection speed, without destructive sampling under the condition of ensuring accuracy, and can realize rapid on-site inspection without unpacking; In occasions such as the mouth and other occasions, it can have a device that detects chemical characteristics and has a fast detection speed and strong adaptability to the size of the cargo.

Utility model content

In view of this, the purpose of this utility model is to provide a security inspection device that can solve at least one aspect of the above-mentioned problems, and can conduct on-site inspection quickly and without destructive sampling while ensuring accuracy.

According to one aspect of the present invention, there is provided a darkroom-type luggage security inspection device, which includes a casing constituting a closed darkroom and components inside the casing. The components inside the casing include:

Sampling system, the sampling system includes a transfer device for transferring the inspected object from the outside to the sample collection device, an X-ray detection device for detecting the position of the inspected object, and a sample collection device for collecting samples, wherein the X-ray detection device It is used to determine the position of the inspected object in the sampling system, so as to transport the inspected object to the desired position together with the conveying device;

A sample handling system for concentrating and resolving samples; and

Sample detection system, through gas chromatography-ion mobility spectrometer or separate ion mobility spectrometer to detect sample components;

Among them, the sampling system, the sample processing system and the sample detection system are connected through the connecting piece, so that the object to be inspected into the casing constituting the airtight darkroom completes sample collection, processing and detection in the casing.

According to one aspect of the present utility model, the X-ray detection device includes an X-ray generator for emitting X-rays, a detector for detecting X-rays, and a display device, and the X-ray detection device is used for detecting The rest of the X-rays are used to show the position of the inspected object in the sampling system and to display the inclusions inside the inspected object.

According to one aspect of the utility model, the conveying device of the sampling system includes a conveyor belt and a conveyor belt mouthpiece, and the two side edges of the conveyor belt and the conveyor belt mouthpiece are configured in a mating structure, so that the conveyor belt mouthpiece allows the conveyor belt to move and forms a seal with the conveyor belt in a stationary state. structure.

According to one aspect of the utility model, the conveyor belt brace is formed of deformable material, and when the conveyor belt is stationary, the conveyor belt brace deforms to form a seal with the conveyor belt due to the negative pressure formed in the housing of the darkroom.

According to one aspect of the present utility model, the sample collection device includes a sampling cavity, the sampling cavity has a first end and a second end opposite to the first end, wherein the transfer device is located at the first end, and the sampling cavity also includes a sample outlet near the second end for discharging the sample;

Wherein, the sampling chamber also includes an inflation inlet and an exhaust port located in the wall of the sampling chamber, the inflation inlet is configured to blow airflow into the sampling chamber, and the exhaust outlet is configured to discharge gas so that the gas inlet and the inflation inlet can be discharged in the sampling chamber. A tornado-like airflow is formed in the body, and the tornado-like airflow advances in a spiral from the first end to the second end of the sampling cavity, so that the sample carried by the object to be inspected is transported to the vicinity of the second end through the tornado-like airflow.

According to an aspect of the present invention, the gas inlet is configured such that the axial inlet direction of the gas inlet is nearly tangent to the inner surface of the inner wall of the cavity, and the axial inlet direction of the gas inlet is inclined toward the sample outlet side.

According to one aspect of the present invention, at least part of the inner wall of the sampling cavity is formed in a frustoconical shape, the small diameter circular end of the frustoconical inner wall is close to the first end of the cavity, and the frustoconical inner wall The large diameter circular end is adjacent to the second end.

According to an aspect of the utility model, the sampling system includes a heating filter, which is used to filter the sample when the sample is transferred from the first end to the second end, and at the same time, it can heat the object to be inspected to help the sample carried by the object to volatilize or detach The inspected object.

According to an aspect of the present invention, the sampling system includes a semi-permeable membrane for selectively filtering the sample, and the semi-permeable membrane separates a space for mixing with the carrier gas in the sampling cavity.

According to one aspect of the present invention, the sample processing system includes a pre-concentrated sampling adsorber, including an adsorption sieve cylinder for concentrating samples and a piston rod for sending the sample in the adsorption sieve cylinder through a piston; and

The thermal analysis chamber is used to separate out the sample in the adsorption sieve drum at high temperature, and use a suitable carrier gas to mix with the sample.

According to an aspect of the present invention, the sample detection system includes a porous capillary column for pre-separating samples and an ion mobility spectrometer.

This darkroom-type luggage security inspection equipment can provide a convenient, fast and effective sampling and injection method as well as a fast and accurate detection method for on-site quick inspection, and realizes fast and accurate inspection without unpacking or destroying the items to be inspected. Trace detection. It is very suitable for the rapid screening and detection of drugs, explosives, volatile prohibited chemical reagents, solid surface contamination and other prohibited items at airports and customs.

In order to achieve the above-mentioned utility model purpose, the utility model technology and implementation scheme can also be realized as follows:

The utility model is suitable for fast GC-IMS, IMS, GC-IMS-MS and other analytical instruments, which are darkroom-type rapid luggage security inspection equipment and corresponding sample collection and concentration methods.

The utility model has the advantages of:

The closed tornado sampling system can be used to sample the whole body of the inspected luggage. At the same time, because the tornado sampling method has a strong suction force, it can greatly improve the volatile and semi-volatile samples entrained in the luggage during the sampling process. The collection efficiency of solid small granular samples adhering to the surface of the bag enables direct sampling of volatile semi-volatile substances and trace solid substances on the surface without opening the bag;

The darkroom-type luggage security inspection equipment of the utility model can concentrate the collected samples during sample detection, which can reduce the requirements for the detection lower limit of the IMS detector, and reduce the development difficulty and cost of the instrument; it can realize the simultaneous detection of positive and negative ions, Compared with the single mode, the detection speed is improved by associating the positive and negative spectra; the darkroom luggage security inspection equipment adopts the full-time pre-concentration sample collection technology, which can greatly improve the sample collection efficiency and the detection efficiency of the instrument.

Compared with conventional luggage security inspection equipment based on X-rays, the darkroom-type luggage security inspection equipment of the present utility model has higher detection sensitivity for volatile and semi-volatile prohibited items carried in luggage, and can detect without dismantling In the case of bags, the types of prohibited products can be accurately known, and at the same time, the X-ray detection device can be used to check other carry-on items on the inspected object. The darkroom type security inspection equipment of the utility model realizes an integrated structure and a more comprehensive inspection.

Description of drawings

In order to make the content of the utility model easier to understand, the utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods. In the accompanying drawings:

Fig. 1 is a schematic diagram of the sampling process of the darkroom-type luggage security inspection equipment of the present invention;

Fig. 2 is a schematic diagram of sampling thermal analysis sample introduction of the darkroom-type luggage security inspection equipment of the present invention;

Fig. 3 is a schematic side view of the darkroom-type luggage security inspection device of the present invention;

Fig. 4 is a top view sectional schematic diagram of the swirling flow guide plate (when a complete circular guide plate is formed) of the darkroom-type luggage security inspection equipment of the present invention;

Notes on Figures 1, 2, 3, and 4:

101 balance pillars;

102 Metal fuselage shielding shell of security inspection equipment;

103 conveyor belt;

104 conveyor belt braces;

105 swirl guide disc;

106 swirl holes;

107 O-shaped sealing ring;

108 inspected bags;

109 inflatable pipes;

110 air guiding cavity;

111 insulation cover;

112 air pump;

113 exhaust pipes;

114 air pump;

115 heating filter screen;

116 bottom clamping nets;

117 semi-permeable membrane;

118 top clamping nets;

119 top leak cover;

120 sample collection connecting tubes;

121 sample collection connecting pipe heating insulation cover;

122 heating rods;

123 temperature probes;

124 sample collection interface;

125 sampling suction pump interface;

126 sampling suction pump;

127 high temperature resistant O-ring;

128 piston cylinders;

129 piston rod;

130 adsorption sieve cylinder;

131 insulation pad;

132 thermal analysis cavity;

133 liners;

134 carrier gas inlet;

135 split/purging interface;

136MCC column;

137 heat conduction sheath;

138 dual-mode ion mobility spectrometer;

139 sampling carrier gas interface;

140X-ray generator;

141 L-shaped array detector;

142 infrared sensors;

143 rolling shutter door;

144 lead shielding curtain.

detailed description

Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings, wherein like numerals refer to like elements throughout. The following embodiments will be described with reference to the figures in order to explain the present invention.

According to an embodiment of the present invention, a darkroom-type security inspection device based on IMS and its combination technology, such as a darkroom-type rapid luggage security inspection device based on IMS and its combination technology (as shown in Figures 1 and 2), includes a sealed The housing 102 of the darkroom. A plurality of components are arranged inside the casing, and the components inside the casing include: a sampling system, a sample processing system, an X-ray detection device and a sample detection system, which are connected through connecting pipes or joints, or fixed on the frame. Alternatively, the X-ray detection device may be arranged outside the dark room, or in other words, the X-ray detection device may not communicate with the above-mentioned systems, which advantageously reduces the risk of contamination of these connected systems.

The internal components of the security inspection equipment include, for example, tornado sampling chamber, full-time pre-concentration sampler, thermal analysis chamber, chromatographic column, insulation system, ion mobility spectrometer, etc. The darkroom-type luggage security inspection equipment of the present utility model adopts a plurality of balance pillars 101 to support the metal fuselage shielding shell 102 and the fixed bracket of the security inspection equipment (the thickness of the casing needs to be sufficient to shield rays). The darkroom luggage security inspection equipment of the present utility model adopts the conveyor belt 103 to transmit the inspected bag 108 and provide support for the inspected bag 108 at the same time, and the conveyor belt 103 is driven by a reduction motor. Conveyor belt braces 104 that cooperate with the conveyor belt are installed on both sides of the conveyor belt 103, and the two sides of the conveyor belt braces 104 cooperate with the conveyor belt 103 to form a matching structure, so that the conveyor belt braces 104 allow the conveyor belt 103 to move and form with the conveyor belt when the conveyor belt does not move. Sealed structure so that the entire darkroom forms a sealed environment. The conveyor belt mouthpiece 104 is formed of deformable material, and the conveyor belt stops running during sample collection. Due to the negative pressure, the conveyor belt mouthpiece 104 deforms and presses the conveyor belt 103, so that the outside air or other substances cannot pass through the gap between the conveyor belt 103 and the conveyor belt mouthpiece 104. Enter the darkroom space to reduce the interference of the outside world on sample collection, analysis and detection. Those skilled in the art should know that in other cases, other devices for transferring samples can be provided as required.

According to an embodiment of the present invention, the sampling system of the darkroom type security inspection equipment includes an X-ray detection device. The X-ray detection device includes an X-ray generator 140, an X-ray detector and a display.

Specifically, a lead shielding curtain 144 is provided at the exit and entrance of the security inspection door of the security inspection equipment, and an infrared sensor 142 is installed on the side wall of the cabinet at the entrance of the security inspection equipment. When the infrared sensor 142 detects that the inspected bag 108 enters the security inspection equipment, the rolling shutter doors 143 distributed at the entrance and exit of the cabinet hang down, and the entire security inspection cavity forms a closed dark room, and the motor decelerates, thereby the conveyor belt decelerates. Subsequently, for example, after about 0.5 seconds, the X-ray generator 140 starts to emit beams. For example, the X-ray detector 141 of the L-shaped array as shown in the figure detects X-rays, and performs photoelectric conversion, and then sends the converted signals to The pre-amplifier and the main amplifier pass through the A/D converter, and then go to the digital image processing system for digital image processing, and display the line-packet tomographic transmission image on the monitor. As the object 108 moves forward, each section of the checked bag 108 is continuously scanned, and the X-ray energy values absorbed by all sections of the luggage or luggage 108 can be recorded, so that the X-ray energy obtained from the X-ray source can be obtained. A complete 2D projection image of the entire line pack 108 in the direction of the detector. Thus, the contents inside the inspected object 108 such as bags are displayed; at the same time, the position of the inspected object 108 can be determined through the image displayed on the display, and when the inspected object 108 reaches the desired position, the conveyor belt stops running. In the embodiment of the present invention, the X-ray detection device is set in the sampling system, which can be used to determine the position of the inspected object 108 and detect whether the inspected object 108 contains prohibited objects. In one embodiment of the present utility model, the X-ray detection device is set in the sampling system, and can scan and inspect the inspected object 108 when the inspected object 108 enters the sampling system, and observe whether there are such as Illegal carrying items such as knives; at the same time, it can be judged whether the object 108 under inspection is in the desired position according to the image displayed on the monitor. In one embodiment according to the present utility model, the X-ray detection device is arranged in the sampling system, and it can be judged whether the object 108 to be inspected is in the desired position according to the image displayed on the display; after the object 108 to be inspected is in the desired position, the X-ray detection The device scans and inspects the inspected object 108 , for example, scans the inspected object 108 by scanning the X-ray generator 140 . The X-ray scanning of the inspected object 108 does not affect other samples carried in the inspected object 108 except for illegally carried objects such as knives, and these samples are inspected and judged by the sample detection system of the security inspection device of the present invention. The darkroom luggage security inspection equipment of the present utility model includes a sampling system, which includes a sample collection device and a transfer device for transferring the inspected object 108 to the sample collection device for inspection. The sample acquisition device includes a sampling chamber having a first end and a second end of the sampling chamber opposite the first end, wherein the transport device is located at the first end, and the sampling chamber also includes a discharge sample near the second end. The sample outlet; wherein, the sampling chamber also includes an air inlet 106 and an exhaust port located in the wall of the sampling chamber, the air inlet 106 is configured to blow air into the sampling chamber, and the exhaust port is configured to discharge gas, so as to be compatible with The inflatable inlet 106 together forms a tornado airflow in the sampling chamber, and the tornado airflow advances in a spiral form from the first end to the second end of the sampling chamber, so that the sample carried by the object 108 to be inspected is transported through the tornado airflow near the second end. It should be understood that the first end and the second end are only used to distinguish the two ends of the sampling cavity, rather than to limit the sequence or importance.

In one embodiment of the present invention, the swirl flow guide plate 105 distributed on the side wall of the cabinet and the rolling door just forms a complete circle, and the air inlet 106 is arranged on the swirl flow guide plate 105, as shown in FIG. 4 . The inner wall of the swirl guide disk 105 forms a part of the inner wall of the sampling chamber, and its cross-sectional shape is formed into a cone as shown in Figure 1, so that the inner wall of the swirl guide disk 105 forms a section together with other parts of the inner wall of the sampling chamber. The head is conical in shape, the small diameter circular end of the frustoconical inner wall is proximate to the first end of the cavity, and the large diameter circular end of the frustoconical inner wall is proximate to the second end. The sampling cavity may be in other forms, for example, more parts or the inner wall of the cavity form a truncated cone, the small diameter end is the first end, and the large diameter end is the second end.

After the darkroom is formed, the air pump 112 and the air pump 114 start to work, and the air pump 112 is filled with gas to inflate the sampling chamber through the inflatable pipeline 109 through the inflatable inlet 106 . The gas inlet 106 is configured such that the axial inlet direction of the gas inlet 106 is nearly tangent to the inner surface of the inner wall of the cavity, and the axial inlet direction of the gas inlet 106 is inclined to the sample outlet side. The airflow discharged from the swirl hole 106 on the swirl guide plate 105 forms a swirling airflow, and under the simultaneous action of the three forces of the air pump 112, the air pump 114, and the sampling suction pump 126, a sampling tornado is formed within the darkroom.

According to an embodiment of the present invention, a heating rod 122 , a thermal insulation cover 111 and an air guiding cavity 110 protected by the thermal insulation cover 111 are arranged in the side wall of the security inspection device. The air guiding cavity may be a sampling cavity. The tornado or tornado air flow is heated by the heating rod 122 and the air guide chamber 110 and the air-filling pipe heated by the insulation cover 111 to form a hot tornado. The gas sample released by the particulate sample or the volatile and semi-volatile items contained in the bag is sucked up. In addition, the hot tornado is conducive to promoting the rapid volatilization or detachment of volatile and volatile prohibited samples in the luggage, which is conducive to sample collection and instrument detection. The tested sample sucked up by the hot tornado quickly passes through the heating filter 115 arranged in the inner space of the air guide chamber 110 under the action of the tornado, and is rapidly heated by the heating filter 115 with high temperature. On the one hand, the heating filter 115 can block the entry of large particles and prevent pipeline clogging. On the other hand, it can heat the samples rolled up by the tornado, especially the rapid heating of solid granular samples and make them partially volatilize. The volatilized sample can pass through the semi-permeable membrane 117 together with the volatile sample and enter the adsorber and detector for analysis and detection.

Under the action of the air pump 114, the hot air is discharged through the air extraction pipe 113, and the hot air does not form convection current with the bottom of the heating filter screen 115, which can effectively protect the inspected bags from the threat of heat. The gas volatilized by the volatile sample in the checked bag can directly pass through the bottom holding net 116, semi-permeable membrane 117, top holding net 118 and enter the top funnel cover 119 space after passing through the heating filter screen 115. The non-volatile solid contaminated samples can volatilize part of the gas samples under the rapid heating of the heating filter 115, and the volatilized gas samples can enter through the bottom clamping net 116, semi-permeable membrane 117, and top clamping net 118. Top funnel cover 119 space. There is a semi-permeable membrane 117 at the lower part of the heating net and the top cover of the funnel. The semi-permeable membrane 117 is clamped by two pieces of metal mesh. On the one hand, it can be used to fix the semi-permeable membrane 117. Torn under action. Semipermeable membrane materials are used to selectively filter substances passing through. The semi-permeable membrane material can prevent water molecules, ammonia molecules and other impurities in the inhaled airborne substances from entering, thereby contaminating the back-end chromatographic column or transfer tube. In addition, the semi-permeable membrane 117 can also limit the formation of clusters and improve the resolution of the instrument Rate. The design of the air guide chamber enables the instrument to simultaneously sample volatile, semi-volatile, and surface contamination, broadening the selectivity for detection substances.

According to an embodiment of the present invention, a heating and heat preservation system is provided in the sample collection pipeline, which can effectively prevent the condensation of inhaled samples and even pipeline pollution caused by condensation.

The sample that reaches the space of the top funnel cover 119 is mixed with the sampling carrier gas flowing in from the sampling carrier gas interface 139 in the funnel cover, and then reaches the pre-concentration through the sample collection connecting pipe 120 and the sample collection interface 124 under the action of the sampling suction pump 126 Sampling adsorber. The full-time pre-concentration sampling adsorber can realize full-time collection of samples, which can greatly improve the detection efficiency of the instrument.

The sample carrier gas mixture containing the sample is first delivered to the sample processing system. The sample processing system is used to concentrate the sample and analyze the sample. The sample processing system includes a pre-concentration sampling adsorber, including an adsorption sieve cylinder for concentrating samples and a piston rod for sending the sample in the adsorption sieve cylinder through a piston; sample and mix with the sample using an appropriate carrier gas.

The mixed gas containing the sample is sent to the adsorption sieve cylinder 130 of the pre-concentration sampling adsorber and is adsorbed by the adsorbent in the sieve cylinder. The sample collection connection pipe 120 is covered with a sample collection connection pipe heating insulation sleeve 121. The heating insulation sleeve can maintain the high temperature in the pipe and can effectively prevent the sample from condensing in the pipe and polluting the pipe. Under the continuous action of the sampling suction pump 126 , enrichment and concentration of the sample in the adsorption sieve cylinder 130 can be realized.

After the sample concentration is completed, the piston rod 129 of the piston-type adsorber can quickly push the adsorption sieve cylinder 130 into the thermal analysis chamber 132 with high temperature under the action of the motor. The preferred thermal analysis chamber is made of chemically stable stainless steel or nickel-plated Made of copper material. Preferably, the pre-concentration sampling adsorber includes two or more adsorption sieve cartridges, correspondingly, a plurality of piston columns.

The sample adsorbed on the adsorbent is rapidly precipitated in the thermal analysis chamber at high temperature, mixed with the preheated carrier gas flowing in from the carrier gas inlet 134, and then carried by the carrier gas into the MCC column 136 for pre-separation. After the pre-separation is completed, it enters the dual-mode ion mobility spectrometer 138 for detection and analysis. The dual-mode ion transfer tube technology can realize simultaneous online detection of ions of positive and negative polar substances, which can improve the detection efficiency of the instrument.

Preferably, the piston cylinder 128 and the thermal insulation pad 131 at the lower part of the adsorption sieve cylinder adopt materials with poor thermal conductivity such as polytetrafluoroethylene and PEEK materials, which can effectively insulate the heat conduction between the thermal analysis chamber 132 and the adsorber during the sample adsorption process. Facilitate sample adsorption.

The thermal analysis chamber 132 is provided with a carrier gas splitting/purging interface 135. When the MCC column 136 cannot fully receive the mixed sample gas, the mixed sample gas is discharged from the splitting/purging interface 135; in addition, fully opening the splitting/purging interface 135 can Purging the thermal analysis chamber 132 can discharge the samples or impurities in the chamber, which can effectively reduce the occurrence of ghost peaks during the secondary sample injection process. At the same time, a chemically stable glass liner 133 is sealed and embedded in the thermal analysis chamber 132. The liner 133 can be replaced regularly. On the one hand, it can ensure that the sample gas does not contact and react with metal materials, and the resulting distortion of the test sample and test signal , on the other hand, it can also prevent large particles from falling into the column and clogging the column.

According to the embodiment of the present utility model, setting the heating filter 115 can not only realize the heating of the sample, especially the heating of the solid granular sample, so that part of the gas can be volatilized and pass through the semi-permeable membrane 117, and it can also prevent large particles of impurities from entering And block the pipe. The semi-permeable membrane 117 can effectively prevent water molecules, ammonia molecules and other impurities in the inhaled airborne substances from entering, effectively prevent the pollution of the chromatographic column or transfer tube, and at the same time limit the formation of clusters and improve the resolution of the instrument .

According to the embodiment of the utility model, during the process of sampling and sample injection analysis, the high temperature resistant O-shaped sealing ring can effectively ensure the sealed connection between the piston adsorber and the piston cylinder 128, and can ensure the efficiency of sample collection and sample injection analysis . On the one hand, the heat conduction sheath 137 is used to protect the MCC 136, and on the other hand, it also provides a sealed interface for the MCC to be connected to the thermal analysis chamber 132 and the dual-mode ion mobility spectrometer 138, and at the same time, it is also beneficial for the external heating and heat preservation circuit to heat the MCC insulation.

When the sample is pushed to the thermal analysis chamber for thermal analysis, the shutter door is opened, and the conveyor belt 103 works, and the first inspected bag (A) is sent out from the exit of the security inspection door, and the other inspected bag (B) is sent out from the exit of the security inspection door at the same time. The entrance of the conveyor belt 103 enters the dark room, the X-ray generator emits beams, and the L-shaped array detector receives the transmitted X-ray signals, and then forms an image through the electronic part and the image processing part. When the bag just completely enters the darkroom, the shutter door is closed again, the tornado sampling system is formed, and sampling starts. This cycle realizes the full-time collection and detection of multiple inspected items.

The following describes a method for inspecting an object to be inspected using a darkroom-type security inspection device according to an embodiment of the present invention. The method generally includes a sample collection step, a sample processing step, and a sample detection step.

The first is sample collection. Place the inspected luggage on the conveyor belt 103 of the security inspection equipment. After the conveyor belt 103 transports the inspected luggage to the darkroom, the front and rear doors of the darkroom controlled by infrared induction are turned from the open state to the closed state and the conveyor belt 103 slows down or stops running. The swirl holes located around the darkroom and arranged in a spiral shape blow air to the checked luggage under the action of the air pump (the air pressure can be adjusted and controlled as needed), the sampling suction nozzle located in the center of the top of the darkroom and the suction nozzle on the top side of the darkroom The pipeline draws gas from the dark room under the action of a high-power air pump, and a tornado is formed under the synergy of the three. The solid small granular samples adhering to the surface of the bag or the volatile substances entrained in the bag volatilize/release the gas under the action of the tornado through the heating net and are heated, and the granular solid sample is heated to volatilize part The gas can pass through the semi-permeable membrane 117 together with the volatile gas sample, and is sucked into the piston-type full-time pre-concentration adsorption chamber equipped with adsorbent from the heated and insulated sampling pipeline by the sampling suction pump for sample adsorption. The alternate use of the type adsorber can realize the full-time alternate collection of samples, and the continuous suction sampling of the sampling aspirator can realize the concentration of the sample.

Sample processing and detection: quickly push the adsorption sieve cylinder with the sample absorbed or even concentrated on the piston adsorber into the thermal analysis chamber, and the sample adsorbed on the adsorbent is rapidly precipitated under the action of high temperature. The preheated chromatographic carrier gas that flows in from the bottom is quickly mixed and brought into the analysis and detection part (MCC and IMS) by the carrier gas to complete the analytical sample injection.

According to an embodiment of the utility model, the darkroom type security inspection device of the utility model is composed of an integral chassis main body. The main body of the cabinet can mainly include a conveyor belt, a cabinet shell, an air guide chamber, a cavity insulation cover, a roller shutter door that is distributed at the positions of the inlet conveyor belt 103 and the outlet conveyor belt 103 and is equipped with a swirl guide plate on the side wall, and the two sides of the bottom of the cabinet. Installed swirl flow guide plate 105, conveyor belt braces 104 embedded on both sides of conveyor belt 103, ventilation holes on the top of the cabinet, air pump 112, air suction pump 114, inflation pipe, air suction pipe, heating filter, sample collection pipe, air guide chamber , semi-permeable membrane 117 and its clamping parts, top funnel cover, etc. The conveyor belt is controlled by a variable speed motor, and the conveyor belt 103 is used to pass the inspected bags through the darkroom, place the inspected baggage on the conveyor belt, and the belt can transfer the inspected baggage to the darkroom. When the infrared induction system installed on the side wall of the chassis at the entrance of the security gate on the side of the host machine detects that the checked baggage has just completely entered the interior of the chassis, the geared motor starts to decelerate or stop running (the conveyor belt decelerates or stops), and is distributed at the entrance of the security gate of the security inspection equipment. The rolling shutter door at the exit hangs down, and the entire main body of the chassis forms a closed dark room. The X-ray inspection device scans the inspected object 108 and displays the scanned image of the inspected object 108 , so as to check whether the inspected object 108 contains contraband and at the same time determine the position of the inspected object 108 . After the inspected object 108 arrives at a desired position, further inspection of the inspected object 108 may be implemented. The swirl guide discs 105 located on both sides of the cabinet and the swirl guide discs 105 located on the front and rear shutter doors just form a complete circle, and the multi-circle swirl holes arranged in a spiral circle on the swirl guide discs 105 are also just formed. The pump 112, the suction pump 114, and the sampling suction pump all start to work, and the gas from the air pump 112 is discharged from the spirally arranged swirl holes at the bottom of the casing along the pipeline of the casing, and forms a spiral wind, which is located on the top of the casing. The suction pump 114 and the sampling suction pump 126 will continue to pull up the spiral airflow formed to form a powerful tornado, and the small particles of solid samples adhering to the surface of the luggage, or the trace gases of volatile substances in the luggage bag will be blown up in the tornado. Under the powerful suction of the cyclone center, it passes through the heating filter screen on the upper part of the air guide chamber, and the gas sample of volatile substances can directly pass through the semi-permeable membrane 117 under the action of the tornado air flow, and then arrive at the sample collection pipe through heating and heat preservation. The adsorber is used for sample adsorption and collection. And the small solid particle sample that is sucked up by the tornado and adhered to the surface of the bag can be heated rapidly between the heating filter screen and the semi-permeable membrane 117 and part of the gas sample is volatilized, and the volatilized gas sample is passed through the semi-permeable membrane 117. Membrane 117, and then the heated and heat-preserved sample collection pipeline reaches the adsorber for adsorption, and the solid particle residue will be strongly sucked out by the air pump 114 to prevent pipeline pollution or affect the detection of the next line of packages. Wherein, the air pump 112 and the air pump 114 are used to provide continuous circulating wind force for the occurrence of a tornado. The power of the air pump 112 can be selected on demand. Due to the gas amplification function of the tornado, the flow rate of the air pump 114 should be more than 10 times that of the air pump 112, so as to form a negative pressure and carry out suction sampling. In order to prevent the air flow charged by the air pump 112 from interfering with the sampling components sucked from the sampling target, on the one hand, the air source collected by the air pump 112 can be as far away as possible from the sampling target, such as the air pump can be moved by a flexible tube that can be retracted and turned. Keep the distance away from the sampling port hole, on the other hand, it can filter and purify the air entering the air pump 112, avoid gas cross-contamination, and improve the sensitivity of the positioning sampling of the sampling instrument. Wherein, the air guide cavity can be heated, and the cavity insulation cover can insulate the entire air guide cavity cavity and the inflatable pipeline between the air guide cavity and the heat preservation cover. Usually, the temperature in the air guide cavity or the dark room can be The setting is 10-20 degrees Celsius higher than room temperature. On the one hand, it ensures safety. On the other hand, it can also promote the rapid volatilization of volatile or volatile prohibited items in the checked bag, which is conducive to sample collection. Wherein, on both sides of the conveyor belt 103, conveyor belt mouthpieces 104 are specially arranged, and densely planted bristles are used at the contact position between the mouthpiece 104 and the conveyor belt 103. The mouthpiece 104 and the bristles can effectively ensure that the darkroom can be sealed in the best state during the tornado sampling process. A large amount of air flow comes from the leakage at the bottom of the belt and affects the detection. Wherein, the semi-permeable membrane 117 is clamped by two metal meshes, which can be used to fix the semi-permeable membrane 117 on the one hand, and prevent the semi-permeable membrane 117 from being torn under the action of a strong tornado on the other hand. The semi-permeable membrane 117 can prevent water molecules, ammonia molecules and other impurity pollutants inhaled into the airborne substance from entering, effectively prevent the pollution of the chromatographic column or transfer tube, and can also limit the formation of clusters and improve the resolution of the instrument. Rate.

According to one embodiment of the present invention, the sample collection connecting pipe is made of metal or chemically stable fluorine rubber or polytetrafluoroethylene pipe, and the pipe wall is provided with a heating film and insulation cotton. During the whole process of sample collection, the sample collection The connecting pipes are maintained at a relatively high temperature (100-250°C), which can effectively prevent the sample from condensing on the inner wall of the pipe during the sample collection process, causing sample loss or pipe pollution.

According to an embodiment of the present invention, the full-time pre-concentration sampler mainly includes a double cylinder piston cylinder, a piston-type adsorber, and a high-temperature-resistant O-ring for sealing the piston cylinder and the piston-type adsorber. Preferably, the double cylinder piston cylinder is made of polytetrafluoro or PEEK material with good thermal insulation performance, good mechanical performance and stable chemical properties. The high-temperature-resistant O-ring is used to form a seal between the piston cylinder and the piston-type adsorber. The piston-type adsorber mainly includes a piston rod body located at the upper part of the adsorber, an adsorber sieve cylinder located at the middle part, and an insulating pad located at the bottom of the adsorber. Preferably, the piston rod is made of polytetrafluoroethylene and driven by a motor. During sample collection and sample analysis, the electrode can drive the piston-type adsorber to seal and slide in the piston cylinder and the thermal analysis chamber. The adsorption sieve cylinder is preferably made of inert metal with stable chemical properties, and an adsorbent can be placed inside the hollow sieve cylinder. The diameter of the adsorbent material should be larger than the diameter of the outer wall hole of the sieve cylinder, and the adsorbent material can be selected according to the main detection target of the user. Select Add if desired. The thermal insulation pad is preferably made of polytetrafluoroethylene material with good thermal insulation performance and stable chemical properties. The thermal insulation pad can effectively isolate the heat exchange between the thermal analysis chamber and the adsorption sieve cylinder, which is beneficial to the adsorption and concentration of samples. The heat insulation pad and the adsorption screen cylinder are connected by a spiral, which is beneficial to the replacement of the heat insulation pad and the replacement of the adsorbent material. During the detection process, the alternate use of two piston-type adsorbers can realize the full-time adsorption of the sample and improve the detection efficiency of the instrument.

According to an embodiment of the present invention, the thermal analysis chamber is covered with a heating film outside the chamber, which can heat the chamber, and at the same time, the outside of the heating film outside the chamber is covered with thermal insulation cotton, which can keep the chamber warm. A temperature probe is also installed, and the cavity temperature can be monitored and controlled in real time through an external temperature control circuit. Both the thermal analysis chamber and the above-mentioned pipeline heating system adopt a temperature-programmed mode, which can effectively reduce power consumption. When analyzing and injecting samples, the motor drives one of the piston adsorbers that absorbs and concentrates the sample to be quickly pushed from the piston cylinder to the thermal analysis chamber with high temperature, and at the same time drives the other piston adsorber that has analyzed and injected samples and completed the detection to pull out. Out, prepare the sample sorbent concentration for the next package to be inspected. The sample adsorbed on the piston adsorber that is quickly pushed into the thermal analysis chamber is instantly precipitated under high temperature conditions, mixed with the carrier gas flowing in from the bottom of the thermal analysis chamber, and then brought into the chromatographic column for pre-separation, and then to the IMS for detection.

According to the embodiment of the present invention, the use of a multi-hole capillary column (MCC) with small volume, high column efficiency and fast separation speed can overcome the long analysis time (10-15 minutes) of conventional capillary columns and the need for a bulky furnace to realize High temperature is difficult to meet the needs of on-site rapid detection.

According to the embodiment of the present utility model, the temperature control system includes a heating system, a heat preservation system, a temperature probe and a temperature control circuit, which are mainly used for sample collection connecting pipes, air guide chambers, heating filter screens, thermal analysis chambers, chromatographic columns and ion The transfer tube is used for heating, heat preservation and temperature control; preferably, the sample collection pipe, the thermal analysis chamber and the transfer tube part are heated by a heating film; the air guide chamber is heated by a heating blanket or a heating rod; Wire heats up quickly. Preferably, the thermal insulation system uses thermal insulation cotton, which is mainly used to cooperate with the temperature control system to insulate the temperature control devices. On the one hand, it can reduce the temperature difference between different parts of the components and improve the detection accuracy; on the other hand, it can reduce the overall Energy consumption.

According to the embodiment of the present invention, the ion mobility spectrometer is a positive and negative dual mode, and the positive and negative dual mode ion mobility spectrometer can realize the simultaneous online detection of the ions of the positive and negative polar substances volatilized in the inspected bag, compared with In the single mode, there is no need for electric field switching, which shortens the detection time and improves the detection efficiency; in addition, the transfer tube is made of high temperature resistant ceramic material, which greatly broadens the range of detectable samples.

Although the utility model has been specifically shown and described with reference to typical embodiments of the utility model, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, , various changes in form and details may be made to these embodiments.

Claims (11)

1. a darkroom formula rays safety detection apparatus, is characterized in that, described darkroom formula rays safety detection apparatus comprises the housing in darkroom and the parts of enclosure interior that formation is airtight, and the parts of enclosure interior comprise:

Sampling system, sampling system comprises in order to tested object being sent to conveyer in sample collecting apparatus from the external world, detect tested object position x-ray detection device and for the sample collecting apparatus of collected specimens, wherein x-ray detection device is for determining the position of tested object in sampling system, to tested object is sent to the position of expectation together with conveyer;

Sample processing system, for concentrating sample and parsing sample; With

Specimen inspection system, detects sample composition by gas-chromatography-ionic migration spectrometer or independent ionic migration spectrometer;

Wherein, sampling system, sample processing system and specimen inspection system are communicated with by connector, make to be admitted to tested object in the housing that forms airtight darkroom and complete in housing collection, processing and the detection of sample.

2. darkroom as claimed in claim 1 formula rays safety detection apparatus, it is characterized in that, x-ray detection device comprises launching the x ray generator of X ray, detector and display unit for detecting x-ray, and x-ray detection device shows the inclusion of checking matter inside for surveying the residue X ray penetrating after tested object to show the position of tested object in sampling system simultaneously.

3. darkroom as claimed in claim 1 formula rays safety detection apparatus, it is characterized in that, the conveyer of sampling system comprises conveyer belt and conveyer belt facing, the both sides of the edge of conveyer belt and conveyer belt facing are configured to fit structure, make conveyer belt facing allow conveyer belt to move and form hermetically-sealed construction with conveyer belt under the motionless state of conveyer belt.

4. darkroom as claimed in claim 3 formula rays safety detection apparatus, is characterized in that, conveyer belt facing is formed by deformable material, under the motionless state of conveyer belt, in the housing due to darkroom, forms negative pressure, and the distortion of conveyer belt facing forms sealing with conveyer belt.

5. darkroom as claimed in claim 1 formula rays safety detection apparatus, it is characterized in that, sample collecting apparatus comprises sampling cavity, sampling cavity has first end and second end relative with first end, wherein said conveyer is positioned at first end, and sampling cavity also comprises near the sample export of the discharge sample of the second end;

Wherein, sampling cavity also comprises inflation entrance and the exhaust outlet of the wall that is positioned at sampling cavity, inflation entrance is configured to be blown into air-flow in sampling cavity, exhaust outlet is configured to Exhaust Gas, to form tornado air-flow in sampling cavity together with inflation entrance, described tornado air-flow is along spiral the advancing of first end to the second end from sampling cavity, and the sample that tested object carries is thus transferred near the second end by tornado air-flow.

6. darkroom as claimed in claim 5 formula rays safety detection apparatus, is characterized in that, inflation entrance is arranged to inflate the axial admission direction of entrance and the inner surface of cavity inner wall and approaches tangently, and the axial admission direction of inflation entrance is oblique towards sample export inclination.

7. darkroom as claimed in claim 5 formula rays safety detection apparatus, it is characterized in that, the inwall of sampling cavity is formed frusto-conical shape at least partly, and the small diameter circular end of conical butt inwall is near the first end of cavity, and the large-diameter circular end of conical butt inwall is near the second end.

8. darkroom as claimed in claim 7 formula rays safety detection apparatus, it is characterized in that, sampling system comprises heating filter screen, for sample from first end in the time that the second end transmits to sample filtering, can heat tested object with the sample volatilization that helps tested object and carry simultaneously or depart from tested object.

9. darkroom as claimed in claim 1 formula rays safety detection apparatus, is characterized in that, sampling system comprises that pellicle is for selective filter sample, and pellicle is separated out the space for mixing with carrier gas in sampling cavity.

10. darkroom as claimed in claim 1 formula rays safety detection apparatus, is characterized in that, sample processing system comprises pre-concentration sampling absorber, comprises for the absorption screen drum of concentrating sample and the piston rod for the sample of absorption screen drum is sent by piston; With

Chamber is analysed in pyrolysis, at high temperature separating out the sample of absorption screen drum, and uses suitable carrier gasses and sample mix.

11. darkroom as claimed in claim 1 formula rays safety detection apparatus, is characterized in that, specimen inspection system comprises porous capillary post and the ionic migration spectrometer for pre-separation sample.