CN105203692A - Security inspection equipment, sampling device of security inspection equipment, security inspection method and sampling method - Google Patents

Abstract

The invention provides security inspection equipment, a sampling device, a security inspection method and a sampling method. The security inspection equipment includes: a sampling device, the sampling device has a sampling surface, and a plurality of suction ports for inhaling the sample particles of the target to be inspected and a plurality of purge ports for blowing out the airflow are arranged in the sampling surface; a pretreatment device and , detection device. The sampling device transports the sample to the pretreatment device, and the pretreatment device transports the pretreated sample to the detection device. The device of the present invention can be conveniently close to the inspected object for detection without causing damage or discomfort to the inspected object, and at the same time as one inspected object is sampled, the sample collected from the previous inspected object is analyzed with high efficiency. high.

Description

Security inspection equipment, sampling device for security inspection equipment, security inspection method and sampling method

technical field

The present invention relates to the field of safety inspection, in particular to security inspection equipment, a sampling device for the security inspection equipment, a security inspection method and a sampling method.

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 problems, and can also obtain the chromatographic retention time, the drift time of the analyte ions in the transfer tube and the signal intensity of the analyte finally induced on the Faraday disk, so that the three-dimensional map information of the analyte can be obtained 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, IMS alone mainly employs swab sampling thermal desorption and direct extraction thermal desorption. The former is only suitable for sampling surface-contaminated substances, and is not suitable for direct sampling of volatile and semi-volatile substances, while the latter will destroy the sample being inspected. For a separate GC, split/splitless injection is generally used for liquid samples, and the samples require complex pre-treatment, which is not suitable for on-site quick inspection.

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, it is possible to have a device that detects chemical characteristics and has high detection efficiency.

Contents of the invention

In view of this, the object of the present invention is to provide a security inspection device that can solve at least part of the above problems, and can conduct on-site inspection quickly and without destructive sampling while ensuring accuracy.

According to one aspect of the present invention, a kind of security inspection equipment is provided, comprising: a sampling device, the sampling device has a sampling surface, and a plurality of suction ports for sucking sample particles of the object to be inspected and a gas flow for blowing out are arranged in the sampling surface. A plurality of purge ports; a pretreatment device for absorbing and concentrating samples; and a detection device for detecting sample properties, wherein the sampling device delivers the sample to the pretreatment device, and the pretreatment device delivers the pretreated sample to the detection device.

According to one aspect of the present invention, a sampling device for security inspection equipment is provided, the sampling device has a sampling surface, and a plurality of suction ports for inhaling sample particles of the object to be inspected and a gas flow for blowing out airflow are arranged in the sampling surface. A plurality of purge ports, wherein the sampling device transports the sample to the subsequent processing device of the security inspection equipment.

According to one aspect of the present invention, a security inspection method is provided, wherein the aforementioned security inspection equipment is used to implement security inspection.

According to one aspect of the present invention, a sampling method is provided, using the aforementioned sampling device for sampling.

The security inspection device of the present invention can be conveniently close to the object to be inspected for detection, without other operations such as scraping, and will not cause damage or discomfort to the object (person) to be inspected, and while sampling an object to be inspected, The sample collected from the previous detected object is analyzed with high efficiency.

Description of drawings

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

Fig. 1 is a schematic perspective view of a security inspection device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the layout of the purge port and the suction port of the sampling device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the arrangement of the purge port and the suction port in the sampling surface of an embodiment of the present invention;

Fig. 4 is a schematic diagram of the layout of the purge port and the suction port in the sampling surface of an embodiment of the present invention;

5 is a cross-sectional view of an air curtain guide according to an embodiment of the present invention;

6 is a cross-sectional view of a tornado suction device according to one embodiment of the present invention.

Explanation of the markings in Figure 1:

101 array suction port;

102 array type purge ports;

103 connecting pipelines;

104 blowing pipes;

105 suction pump;

106 air pump;

107 collection interface;

108 suction pump interface;

109 high temperature resistant O-rings;

110 piston cylinder;

111 piston rod;

112 adsorption sieve drums;

113 insulation pad;

114 thermal analysis cavity;

115 glass liner;

116 carrier gas inlet;

117 split/purging interface;

118MCC column;

119 dual-mode ion mobility spectrometer;

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the specification, the same reference numerals denote the same components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention, but should not be construed as limiting the present invention.

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

According to one embodiment of the present invention, a kind of security inspection equipment comprises: sampling device 10, described sampling device 10a has sampling surface 100, and a plurality of suction ports 101 and A plurality of purge ports 102 for blowing out the air flow; a pretreatment device 20a for absorbing and concentrating samples; The processing device delivers the pretreated sample to the detection device.

According to an embodiment of the present invention, the multiple purge ports 102 and the multiple suction ports 101 are respectively arranged in the sampling surface 100 in the form of an array, and the multiple purge ports 102 array and the multiple Arrays of suction ports 101 are alternately arranged in the sampling surface 100 . In one embodiment of the invention, the plurality of purge ports 102 and the plurality of suction ports 101 are respectively arranged in the sampling surface 100 in the form of an array, and the plurality of purge ports 102 arrays are embedded in the The plurality of suction ports 101 arrays are arranged at intervals in the sampling surface 100 .

According to an embodiment of the invention, the plurality of purge ports 102 and the plurality of suction ports 101 are configured to operate simultaneously or alternately.

In one embodiment of the present invention, a plurality of purge ports 102 and a plurality of suction ports 101 can be arranged as shown in FIG. The columns of sweep ports 102 and the columns of suction ports 101 are arranged alternately. In the figure, the purge port 102 is represented by a circle, and the suction port 101 is represented by an ellipse. However, the purge port 102 can be elliptical, and the suction port 101 can be circular, or they have the same shape or other shapes, and here the suction port 101 and the purge port 102 are shown as different shapes for easy distinction. In another embodiment of the present invention, the plurality of purge ports 102 and the plurality of suction ports 101 may be arranged in an alternate form of one row of purge ports 102 + two or more rows of suction ports 101 .

In one embodiment of the present invention, multiple purge ports 102 and multiple suction ports 101 may be arranged as shown in FIG. 3 . Each purge port 102 is adjacent to each suction port 102 . This can also be regarded as embedding a plurality of purge ports 102 into a plurality of suction ports 101 . In the figure, a circle is used to represent the purge port 102, and an ellipse represents the suction port 101. However, it should be noted that a single purge port 102 can be oval, and a single suction port 101 can be circular, or they are the same shape or other The shapes, here the suction port 101 and the purge port 102 are represented by different shapes can be easily distinguished.

In one embodiment of the present invention, a plurality of purge ports 102 and a plurality of suction ports 101 can be arranged as shown in FIG. Arranged in the inner circle. In another embodiment, multiple purge ports 102 may be arranged on the inner ring, and multiple suction ports 101 may be arranged on the outer periphery. It is advantageous to arrange a plurality of purge ports and suction ports in this way. When the purge port 102 arranged in the inner ring sprays gas, such as hot air, to objects or luggage and the like, the sample is blown away or heated. The gas warms up and escapes into the air, and the suction port 101 on the outer ring quickly sucks the sample. The actual operation proves that such an arrangement brings good collection effect. In another embodiment, the plurality of purge ports 102 may be arranged in other shapes, such as quadrilaterals, and the plurality of suction ports are arranged within the range of the pattern formed by the plurality of purge ports 102 . In one embodiment of the invention, at least some of the plurality of suction ports 101 are provided with filters for preventing large particles from entering the suction ports 101 .

In one embodiment of the invention, the sampling device 10 is connected to the pretreatment device via a pluggable connecting conduit 103 . For example, the sampling device 10 is connected to the pretreatment device through a pluggable connecting pipe 103 with buckles. For example, the sampling device 10 is connected to the pretreatment device via a pluggable connection pipe 103 with a tight fit interface. The connecting pipe 103 includes a temperature control device 1031, which is used to maintain the required temperature in the connecting pipe 103 so that the temperature of the gas or sample passing through the connecting pipe 103 rises to a predetermined temperature. The temperature control device 1031 includes a thermal insulation layer, a heater As well as the sensor (indicated by a black thick line in Fig. 1), the heater can be a thin film heater or a heating wire; the sensor can be a thin film sensor, which is conducive to the deformation of the connecting pipeline. In one embodiment of the invention, the connection conduit 103 includes a suction conduit (eg, within the connection conduit 103 , not shown separately) for the suction port 101 and a blowing conduit 104 for the purge port 102 . A desiccant can be placed in the connecting pipe 103 to remove moisture from the sample and the hot air.

In one embodiment of the invention, the sampling device 10 also includes a sampling suction pump 105, which communicates with the pretreatment device and the suction port 101 through, for example, the suction pipe in the connecting pipe 103 to form a sampling passage for A negative pressure is formed to inhale the sample, and then the sample is adsorbed at the pretreatment device.

In one embodiment of the invention, the sampling device 10 further includes an air pump 106 configured to blow gas out of the purge port 102 or out of the pretreatment device through the gas blowing pipeline 104 . The blowing pipeline 104 may be a separate pipeline, which has a heating function, so that the gas passing through the blowing pipeline 104 is heated to form a hot air flow. In one embodiment, a flexible heating wire 1041 is provided on or inside the wall of the air blowing pipe 104 , and the temperature inside the air blowing pipe 104 increases through the heating and radiation of the heating wire.

The air pump 106 can communicate with the array type purge port 102 through, for example, the blowing pipeline 104 arranged in the connecting pipeline 103. When sampling, the air pump 106 is inflated, and the gas is heated in the blowing pipeline 104 to form a hot air flow. The surface of the object to be inspected is purged through the purge port 102, so that the volatile substances in the object to be inspected are quickly volatilized and the contaminants on the surface of the object to be inspected are raised. Since the hot gas flow accelerates the rapid volatilization of volatile samples hidden in the target to be inspected, it can assist in sample collection.

In one embodiment of the invention, the pretreatment device includes a full-time pre-concentration adsorber, which includes a first piston-type adsorption concentrator and a second piston-type adsorption concentrator, wherein the suction pipeline and the blowing pipeline 104 of the connecting pipeline 103 pass through The switching device is respectively connected to any one of the first piston-type adsorption concentrator and the second piston-type adsorption concentrator, so that the sample is sent to one of the first piston-type adsorption concentrator and the second piston-type adsorption concentrator in the suction pipeline. During this period, the other one of the first piston-type adsorption concentrator and the second piston-type adsorption concentrator performs analysis of the sample. The gas blowing pipeline 104 can blow gas to one of the first piston type adsorption concentrator and the second piston type adsorption concentrator so as to clean and remove the sample on the piston type adsorption concentrator. That is to say, the air blowing pipeline 104 connected with the air blowing pump can be connected to the purge port 102 of the sampling surface 100 or to a piston type adsorption concentrator. In one embodiment of the invention, the detection device comprises a gas chromatography-ion mobility spectrometer (GC-IMS).

In the security inspection equipment of one embodiment of the invention, when the object to be inspected is close to the security inspection equipment in the embodiment of the present invention, the security inspection equipment taking GC-IMS as an example is provided with an area array suction port 101 and an area array heat flow purge port 102 On the sampling surface 100, the security inspection equipment is turned on, the air pump 106 and the suction pump 105 are connected, and the switch of the temperature control device 1031 connected to the channel starts to work. As shown in Figure 1, the clean air flows through the air blowing duct 104 with the function of heating and heat preservation and is blown out from the area array purge port 102 after being heated, and the surface of the object to be inspected is purged. The purging of the hot air flow can The small particles adhering to the surface of the object to be checked can also accelerate the volatilization of volatile and volatile substances in the object to be checked; Gas sampling, the small particle samples adhered to the surface of the tested object or have been lifted by the heat flow, and the gas samples volatilized by the volatile and semi-volatile substances hidden inside the tested object are sucked by the sampling suction pump 105 Enter the area array suction port 101 under action. The sample then reaches the adsorption sieve cylinder 110 (normal temperature) through the connecting pipe 103 with the function of heating and heat preservation, and the sample collection interface 107, and is adsorbed by the adsorbent in the sieve cylinder.

In FIG. 1, the blowing duct 104 and the suction duct are provided separately. In another embodiment of the present invention, the suction pipe and the blowing pipe 104 are integrated in the connecting pipe 103, which facilitates insertion and extraction. Connecting pipeline 103 comprises temperature control device 1031, and temperature control device 1031 comprises insulating layer, heater and sensor (not shown in the figure), and the temperature control device 1031 of connecting pipeline 103 is used for maintaining required temperature in connecting pipeline 103 so that The temperature of the gas or sample passing through the connecting pipe 103 is raised to a predetermined temperature. In another embodiment of the present invention, the connecting pipe 103 may only include a heater and an insulation layer wrapped around the pipe, so as to control the temperature inside the connecting pipe 103 to a substantially higher temperature. The proper temperature in the connecting pipeline 103 can effectively prevent the sample from condensing in the pipeline and causing pipeline pollution. In one embodiment of the present invention, the connecting pipe 103 is flexible, which facilitates the movement of the sampling device 10 relative to the pretreatment device.

Under the continuous suction of the sampling suction pump 105, the enrichment of the sample to be detected in the adsorption sieve cylinder 112 of the piston type adsorption concentrator can be realized. After the sample concentration is completed, the piston rod 111 of the piston type adsorption concentrator can quickly push the adsorption sieve cylinder 112 into the heated and kept warm thermal analysis chamber 114 under the action of the motor drive.

In Figure 1, for example, the piston-type adsorption concentrator on the left is in communication with the suction pipe, the inhaled gas containing the sample passes through the adsorption concentrator, the sample is adsorbed, and the air is filtered and then discharged. As shown in FIG. 1 , the piston type adsorption concentrator on the left leaves the thermal analysis chamber 114 , and the right piston type adsorption concentrator enters the thermal analysis chamber 114 . The outlet of the suction pipeline and the outlet of the blowing pipeline 104 can be switched between the left and right adsorption concentrators. When the outlet of the suction pipe communicates with the left piston-type adsorption concentrator, the right piston-type adsorption concentrator enters the analysis chamber to analyze the sample, thereby improving the efficiency of sample pretreatment. For example, during the collection of a sample of an inspected object, analysis of the sample of the last inspected object and subsequent analysis may be started.

Preferably, the thermal analysis chamber is made of chemically stable stainless steel or nickel-plated copper material, and the thermal analysis chamber adopts temperature programming. The sample adsorbed on the adsorbent is rapidly precipitated by high temperature heating in the thermal analysis chamber. The precipitated sample can be mixed with the preheated carrier gas flowing in from the carrier gas inlet 116, and carried into the MCC column 118 by the carrier gas for pre-separation, and the components of the separated sample enter the dual-mode ion mobility spectrometer in turn 119 for detection and analysis (wherein the sampling detection can perform multiple sampling and analysis on the detected target as required). Preferably, the piston cylinder 110 and the insulation pad 113 at the lower part of the adsorption sieve cylinder are made of materials with low thermal conductivity, such as polytetrafluoroethylene, PEEK and the like. The thermal insulation pad 113 can effectively isolate the heat conduction between the thermal analysis chamber 114 and the adsorber during the sample adsorption process, which is beneficial to the sample adsorption. The thermal analysis chamber 114 is provided with a carrier gas splitting/purging interface 117. The splitting/purging interface 117 can purge the thermal analysis chamber 114. Purging can discharge waste samples and impurities in the thermal analysis chamber 114, which can effectively avoid Appearance of ghost peaks during secondary injection. A chemically stable glass liner 115 is sealed and embedded in the thermal analysis chamber 114. The glass liner 115 can be replaced regularly. The liner can effectively reduce the distortion of the detection sample and detection signal. On the other hand, it can also prevent large particles from falling into the chromatogram column and clog the column. During the process of sampling and sample injection analysis, the high temperature resistant O-ring 109 can effectively ensure the sealed connection between the piston adsorber and the piston cylinder 110, and can ensure that the collected samples are not lost. On the one hand, the heat-conducting sheath is used to protect the MCC column 118, and on the other hand, it also provides a sealed interface for the MCC to be connected to the thermal analysis chamber 114 and the dual-mode ion mobility spectrometer 119. Heat insulation. When the sampled product from the previous inspected object is pushed to the thermal analysis chamber for thermal analysis, the next inspected object can be brought close to the security inspection device for sample collection. This cycle realizes full-time sample collection and detection of multiple inspected objects. . A sample collection, concentration, analysis and sampling device in the embodiment of the present invention continues to use the full-time pre-concentration sampling technology, and assists heat flow purging, so that the sampling efficiency is higher; and a GC-based The trace security inspection equipment of IMS has the characteristics of small size, high sampling efficiency, high sensitivity and fast detection speed. It can be used for security inspection of people and luggage, and it is also convenient to be used in combination with other detection technologies. Very suitable for airports, customs, stations and other places.

According to one embodiment of the present invention, a kind of sampling device 10 is provided, and described sampling device 10 has sampling surface 100, and in sampling surface 100, a plurality of suction ports 101 for inhaling the sample particles of the target to be checked and for blowing out A plurality of purge ports 102 for the airflow, wherein the sampling device 10 transports the sample to the subsequent processing device of the security inspection equipment. The plurality of purge ports 102 and the plurality of suction ports 101 are respectively arranged in the sampling surface 100 in the form of an array, and the plurality of purge ports 102 arrays are embedded in the array of the plurality of suction ports 101 The forms in the gap are arranged within the sampling surface 100 . The sampling device 10 also includes an aspirating pump 105, which communicates with subsequent equipment such as a pretreatment device and the suction port 101 to form a sampling channel through a suction pipe in the connection pipe 103, and is used to form a negative pressure suction sample at the suction port 101. Also included is an air pump 106 configured to blow gas out of the purge port 102 through, for example, the blowing conduit 104 in the connecting conduit 103 . The plurality of purge ports 102 and the plurality of suction ports 101 are configured to be operable simultaneously or alternately. The gas blown out of the purge port 102 can be heated through the blowing pipe 104 to form a hot air flow to purge the inspected object. The hot air flow is beneficial, it can accelerate the volatilization of volatile samples or substances from the target to be tested, and it can also accelerate the separation of some samples that adhere to the surface or hidden place of the target to be tested, so that the samples that are separated from the target to be tested are sucked into the mouth 101 inhalation.

According to another aspect of the present invention, there is provided a security inspection method using the above security inspection equipment, including the following steps: when a person or luggage approaches the area array sampling device 10, start the air pump 106, and clean air flows through The air blowing pipeline 104 is heated and then the surface of the object to be inspected is purged with hot air through the purge port 102 of the sampling surface 100. The sample to the ambient gas is pumped into the sample adsorption chamber of the full-time pre-concentration sampler; the thermal desorption temperature control system is activated to maintain the temperature of the thermal desorption chamber at a constant high temperature; and the piston adsorber is moved and positioned at In the sample analysis position, the adsorption chamber is positioned in the thermal analysis chamber and the sample adsorbed by the adsorption chamber is rapidly precipitated in the thermal analysis chamber at high temperature.

According to yet another embodiment of the present invention, a sampling method is provided, wherein the sampling device 10 as mentioned above is used to sample the detected object.

According to yet another embodiment of the present invention, a security inspection device is provided, which is similar to the aforementioned security inspection device. In order to avoid redundant description, only the different parts are described here. The difference between this embodiment and the aforementioned security inspection equipment is that this embodiment does not use a sampling aspirating pump, but uses a tornado aspirating device. One tornado device can be used, and multiple tornado devices can be used, respectively connected to one or more suction inlets 101 .

The structure of the tornado device is introduced below. Fig. 6 is a schematic longitudinal sectional view of a tornado sampling device according to a preferred embodiment of the present invention. As shown in Figure 6, a kind of tornado type real-time sampling device that airborne substance has the collection function of amplification, comprises: end cover 1, has hole; And, the pressure ring 2 that is arranged on the end cover 1, pressure ring 2 will The coarse filter screen 3 and the micro filter screen 4 are installed on the opening of the end cover 1 to prevent large particles from entering the sampling device. The coarse filter can not only filter large particles, but also has strong rigidity, which can prevent the pressure from the external environment and the impact of large particles. Microfilters are used to filter fine solid particles or particles. Alternatively, an integral end cap 1 may be used, wherein the integral end cap has an opening, or sampling inlet, arranged with a porous element 3 or 4 in order to block the passage of large particulate matter through the end cap 1 .

The sampling device according to the present invention also includes an air curtain guide body 5 , and the end cover 1 can be sealed on the rotating air curtain guide body 5 through an O-ring 8 so as to seal the upper ring surface of the air curtain guide body 5 . The rotary air curtain guide 5 has a cylindrical outer sidewall, and may have a funnel-shaped inner sidewall in cross-section as shown in the figure. In other words, the air curtain guide body 5 can be a combination of a cylinder and a funnel-shaped inner sidewall. Alternatively, the air curtain guide body 5 may be an integrally formed single piece. The included angle between the funnel-shaped inner wall and the cylindrical outer wall can be between 20°-30°, but other included angles are also optional.

In one embodiment, the diameter of the lower end surface of the funnel-shaped inner wall of the air curtain guide body 5 is at least twice the diameter of the upper end surface. In other words, the diameter of the lower opening formed by the funneled inner sidewall is at least twice the diameter of the upper opening. This funnel-shaped design is used to simulate the formation of a tornado. The inner side of the funnel-shaped inner sidewall of the air curtain guide body 5 defines an inner space, that is, the inner space between two inner sidewalls as shown in the sectional view shown in FIG. 6 . However, in other embodiments of the present invention, the diameter of the lower end surface of the funnel-shaped inner wall of the air curtain guide body 5 is three times the diameter of the upper end surface, or the diameter of the lower end surface of the funnel-shaped inner wall of the air curtain guide body 5 is larger than that of the upper end surface. The end face diameter is much larger.

FIG. 5 shows a schematic cross-sectional view of the side wall of the air curtain guide 5 along A-A. As shown in Figure 5, a plurality of swirl holes 6 are evenly arranged on the upper end of the funnel-shaped inner wall of the air curtain guide body 5, and the axial direction of these swirl holes 6 is nearly tangent to the inner wall of the funnel, and the axis of the swirl holes 6 The included angle with the vertical direction is between 45° and 90°. Thus, the swirl holes are oriented tangentially to the funnel-shaped inner sidewall of the air curtain guide body 5 and downward (in the direction of the arrow shown in FIG. direction of downward flow.

There is an air inlet 7 on the cylindrical outer wall of the air curtain guide body 5 . The cylindrical outer wall of the rotating air curtain guide body 5, the funnel inner wall and the end cover 1 surround an annular space. Gas can enter the annular space from the inflation inlet 7, and then the air in the annular space is blown into the funnel-shaped inner space of the air curtain guide body 5 along the swirl holes 6 on the funnel-shaped inner wall to form a swirl air curtain 30.

In this embodiment, it is shown that the sample is sucked in from the upper end and discharged from the lower end, and the inflation gas flow spirally flows from the top to the bottom. However, this is only an example. When the sampling device is placed horizontally against the detected object, for example, when the sampling inlet is facing the detected object on the left side of the sampling device, the side of the small opening of the air curtain guide 5 faces the left detected object, At this time, the funnel-shaped inner wall 9 is arranged horizontally, and the sample travels from left to right.

According to an embodiment of the present invention, the air curtain guide body 5 may include an inflation duct 18 . Fig. 6 shows an arrangement mode, one end of the inflation pipe 18 communicates with the inflation inlet 7, and the other end communicates with the air pump 28 for inflation. The air pump 28 for inflation sends the air wind into the annular space along the inflation pipe 18 through the inflation inlet 7, and the air wind in the annular space is blown into the funnel-shaped inner space along the swirl hole 6 on the funnel-shaped inner wall to form a swirl air curtain 30. The arrangement of the annular space is advantageous, and the instability of the intake air can be eliminated through the annular space.

The sampling device also includes an air guide chamber 9, which has a cylindrical inner wall. The air guide cavity 9 is nested under the air curtain guide body 5 through an O-ring. The air guide chamber 9 and the air curtain guide body 5 can be joined in other forms, as long as it does not affect the formation of a tornado airflow in the air guide chamber. The tornado airflow is known to those skilled in the art, that is, the peripheral gas in the airflow rotates helically at a high speed or at least rapidly, that is, on the transverse section (on the section of the wind guide cavity in this embodiment) it is a rotational movement, and at the same time In the longitudinal direction, there is a speed of moving forward (from one end of the sampling inlet to one end of the sample outlet in this embodiment); at the same time, the gas at the center or axis of the airflow is sucked forward along the longitudinal direction. The air guide cavity 9 is used to maintain the tornado cyclone and guide the airborne material sucked by the tornado axis to enter the subsequent detection device. As shown in FIG. 6 , the swirl air curtain 30 is pushed downwards and enters the air guide cavity 9 to form a swirl airflow 31 . The tornado-type swirling airflow 32 flows along the air guide cavity 9 , and is discharged from the exhaust pump interface 23 and the air outlet 27 through the cyclone outlet 10 on the side wall of the lower end of the air guide cavity 9 .

The sampling device also includes a funnel-shaped bottom cover 13 , which seals the lower end surface of the air guide chamber 9 through an O-ring 8 . A semi-permeable membrane 11 is provided between the bottom cover 13 and the lower port of the air guide cavity 9, and the semi-permeable membrane 11 can prevent water molecules, ammonia molecules and other impurity pollutants inhaled from the airborne substance from entering and polluting the chromatographic column at the rear end or migrating Tube. In addition, the semipermeable membrane 11 also limits the formation of clusters, thereby improving the resolution of the instrument.

According to the embodiment of the present invention, two pieces of mesh metal 12 may be provided to clamp and protect the semi-permeable membrane 11 and prevent the semi-permeable membrane 12 from being broken by the airflow.

The funnel-shaped bottom cover 13 can be used as a mixing area or chamber for carrier gas and sample. The funnel-shaped bottom cover 13 may include a carrier gas channel 21 for injecting carrier gas, and the incoming carrier gas is fully mixed with the sample in the funnel. The funnel-shaped bottom cover 13 may also include a sample inlet 20 through which the collected sample and carrier gas are discharged through the sample inlet 20 after being mixed and preheated, for example. In some cases, the sample and carrier gas can be mixed directly and discharged without heating.

The sampling device also includes a thermal insulation cover 14 arranged on the air guide chamber 9, a heating rod 16 and a temperature sensor 17 arranged in the air guide chamber 9, thus they constitute a temperature control system, which can control the temperature of the air guide chamber 9, For example heating up. The temperature control system can control the temperature in the chamber between 50°C and 250°C. The high temperature helps the airborne substances with high boiling point to vaporize quickly and pass through the semi-permeable membrane smoothly, and it is also conducive to vaporizing the sample and removing it from the funnel side wall. The carrier gas coming in from the carrier gas channel 21 is fully mixed in the funnel, which can effectively improve the detection limit of the instrument for high boiling point substances. The collected sample is mixed with the carrier gas and preheated, and then carried by the carrier gas into the injection port 20 . The rotating air curtain guide body 5, the air guiding cavity 9, and the bottom cover 13 can be made of metal materials with good thermal properties, and the outer heat preservation jacket 13 can be made of ~10mm thick airgel or glass or ceramic wool. Optionally, a polytetrafluoroethylene outer cover 15 can be used to cover the heat insulating layer 13 .

Fig. 7 shows the bottom end surface of outer cover 15, and it comprises air pump interface 22, exhaust pump interface 23, such as follow-up equipment interface 24 of GC column/ion transfer tube, heating rod lead-out line 25, temperature sensor lead-out line 26, air outlet 27 and carrier gas tube interface 36. Wherein, the air pump interface 22 and the exhaust pump interface 23 can be respectively connected with an air pump 28 for continuously providing gas pressure so as to form a tornado air flow inside the sampling device. The exhaust pump interface 23 is expected to be arranged so that the air resistance is as small as possible, so the opening of the exhaust pump interface in the air guide cavity is expected to face the direction of the airflow, so that the airflow can easily flow into the exhaust pump interface. The exhaust pump interface 23 can also be directly used as an air outlet without connecting the air pump 28. In order to make the airflow amplified by the tornado type be discharged, several more air outlets 27 can be designed. The GC column/ion transfer tube interface 24 can be connected to a GC column, or directly connected to detection equipment such as an ion transfer tube. The carrier gas pipe interface 36 is connected to the molecular sieve 35 so as to purify the carrier gas.

The power of the air pump 28 as shown in the figure can be adjusted as required. Because the tornado type has the function of gas collection and amplification, the flow rate of the exhaust pump is more than 10 times that of the air pump.

In order to prevent the air flow charged by the air pump 28 from interfering with the target components sucked from the sampling target 33, on the one hand, the air source collected by the air pump can be as far as possible from the sampling target 33, such as using a flexible conduit that can be retracted and turned. The distance between the air pump and the sampling port hole is widened. On the other hand, the air entering the air pump can be filtered and purified to avoid gas cross-contamination and improve the sensitivity of the sampling instrument for positioning and sampling.

The following describes the sampling and sampling process of the tornado sampling device with amplified gas collection function according to the embodiment of the present invention.

Aim the front hole of the sampling device of the present invention at the sampling target 33 at a distance of 5-10 cm, and turn on the inflation and exhaust air pump 28 at the same time. The inflation air flow 29 is filled into the annular space of the air curtain guide body 5 through the inflation inlet 7 along the inflation pipe, and the gas pressure is generated in the annular space under the continuous wind pressure of the air pump 28. The swirl holes 6 are blown into the inner space of the funnel, and due to the specific configuration of the swirl holes 6, air is blown into the inner space in a specific direction, thereby forming a funnel-shaped swirling air curtain 30 . Under the situation that the air pump 28 constantly blows in air, the rotating air curtain 30 that is constantly formed moves along the inner wall of the air guide chamber 9, that is, rotates rapidly around the central axis 32 of the air guide chamber 9 and moves downward at the same time, forming a tornado air flow 31. Due to the effect of the centrifugal force formed by the rotation, the center air pressure of the tornado airflow significantly reduces, for example, the air pressure of the center axis 32 is about 10 times lower than the surrounding air pressure, thus at the center axis of the wind guide cavity 9, a large force will be generated suction power. The suction force can make the airborne substance in the vicinity of the sampled target 33 be sucked near the center of the wind axis of the air guide chamber 9 from around the front end hole of the air guide chamber 9, and form a sample gas column, along the central axis of the tornado airflow 32 moves downward, and finally the sample reaches the semi-permeable membrane 11 for sampling. This process is similar to the tornado-style "dragon fetching water" in nature.

On the one hand, the collected sample enters the funnel-shaped cavity of the bottom cover 13 through the semi-permeable membrane 11, and is rapidly vaporized under the condition of preheating and mixed with the carrier gas flow coming in from the carrier gas channel 21 in the side wall of the bottom cover 13. 37 is fully mixed, and then the carrier gas carries the sample into the injection port 20.

On the other hand, for the gas on the periphery of the center of rotation of the tornado airflow 31, a cyclone is formed at the periphery of the tornado airflow 31 and moves along the wind guide chamber 9 sidewalls. When at the bottom of the wind guide chamber, the gas of the peripheral cyclone enters the outlet 10, which Part of the gas forms a cyclone outlet airflow 34 and is discharged through the air outlet 27 . The outlet 10 is arranged to face the airflow direction of the cyclone. In the orientation shown in FIG. In the direction of the velocity of the airflow at the outlet. That is to say, although the opening direction of the outlet 10 is not strictly opposite to the velocity direction of the airflow at the outlet, the opening direction of the outlet 10 is close to the opposite direction of the velocity of the airflow at the outlet, so that the gas can enter the outlet 10 more easily was discharged.

Through this process, the sampling device continuously pumps sample molecules to achieve amplified collection of airborne substances.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the present invention. within the scope of protection.

Claims (21)

1. a rays safety detection apparatus, comprising:

Sampling apparatus, described sampling apparatus has sampling face, arranges multiple suction inlet of the sample particle for sucking tested target and the multiple blow valve ports for blowing out air-flow in sampling face;

Pretreatment unit, for absorption and concentrating sample; And

Pick-up unit, for detecting properties of samples,

Wherein, sampling apparatus by sample delivery to pretreatment unit, pretreatment unit by pretreated sample delivery to pick-up unit.

2. rays safety detection apparatus as claimed in claim 1, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and described multiple blow valve port array and described multiple suction inlet array are alternately arranged in sampling face.

3. rays safety detection apparatus as claimed in claim 1, wherein said multiple blow valve port and described multiple suction inlet are configured to or alternately to operate simultaneously.

4. rays safety detection apparatus as claimed in claim 1, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and described multiple blow valve port array is to be embedded in arranged in form in the interval of described multiple suction inlet array in sampling face.

5. rays safety detection apparatus as claimed in claim 1, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and multiple suction inlet mode that is rounded or polygonal arrangement is arranged in outer ring, multiple blow valve port mode that is rounded or polygonal arrangement is arranged in inner ring.

6. rays safety detection apparatus as claimed in claim 1, wherein said multiple suction inlet filtrator is set at least partly, enter in suction inlet for stoping large particle.

7. rays safety detection apparatus as claimed in claim 1, wherein sampling apparatus is connected to pretreatment unit by pluggable connecting tube, described connecting tube comprises temperature regulating device, make to be increased to predetermined temperature by the gas of connecting tube or the temperature of sample for maintaining required temperature in connecting tube, temperature regulating device comprises heat-insulation layer, well heater and sensor.

8. rays safety detection apparatus as claimed in claim 7, wherein connecting tube comprises the upstream line for air entry and the gassing pipe for inflatable mouth.

9. rays safety detection apparatus as claimed in claim 8, wherein sampling apparatus also comprises sampling asepwirator pump, to be communicated with pretreatment unit and suction inlet by the upstream line in described connecting tube and to form path of sampling, suck sample for forming negative pressure at suction inlet place, and sample is adsorbed at pretreatment unit place.

10. rays safety detection apparatus as claimed in claim 8, wherein sampling apparatus also comprises inflator pump, and described inflator pump is configured to be blown out from blow valve port by gas by the gassing pipe in described connecting tube or blown out from pretreatment unit by gas.

11. rays safety detection apparatus as claimed in claim 8, wherein pretreatment unit comprises full-time pre-concentration adsorber, it comprises first piston formula Adsorption Concentration device and the second piston type Adsorption Concentration device, wherein the upstream line of connecting tube and gassing pipe are connected to any one of first piston formula Adsorption Concentration device and the second piston type Adsorption Concentration device respectively by switching device shifter, make the period sent into by sample at upstream line in first piston formula Adsorption Concentration device and the second piston type Adsorption Concentration device, another in first piston formula Adsorption Concentration device and the second piston type Adsorption Concentration device carries out the parsing of sample.

12. rays safety detection apparatus as claimed in claim 1, wherein pick-up unit comprises gas chromatography-ionic migration spectrometer.

13. 1 kinds of sampling apparatuses for rays safety detection apparatus, described sampling apparatus has sampling face, arranges multiple suction inlet of the sample particle for sucking tested target and the multiple blow valve ports for blowing out air-flow in sampling face,

Wherein, sampling apparatus by sample delivery to the follow-up treating apparatus of rays safety detection apparatus.

14. sampling apparatuses as claimed in claim 13, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and described multiple blow valve port array is to be embedded in arranged in form in the gap of described multiple suction inlet array in sampling face.

15. sampling apparatuses as claimed in claim 13, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and described multiple blow valve port array and described multiple suction inlet array are alternately arranged in sampling face.

16. sampling apparatuses as claimed in claim 13, wherein said multiple blow valve port and described multiple suction inlet respectively with the arranged in form of array in sampling face, and multiple blow valve port mode that is rounded or polygonal arrangement is arranged in outer ring, multiple suction inlet mode that is rounded or polygonal arrangement is arranged in inner ring.

17. sampling apparatuses as claimed in claim 13, wherein sampling apparatus also comprises sampling asepwirator pump, is communicated with forms path of sampling with upstream line and suction inlet, sucks sample for forming negative pressure at suction inlet place.

18. sampling apparatuses as claimed in claim 13, wherein sampling apparatus also comprises inflator pump, and described inflator pump is configured to be blown out from blow valve port by gas by gassing pipe.

19. sampling apparatuses as claimed in claim 13, wherein sampling apparatus also wind spout getter device, sample path, for forming negative pressure suction sample at suction inlet place with being formed by upstream line.

20. 1 kinds of safety inspection methods, wherein use as the rays safety detection apparatus according to any one of aforementioned claim 1-12 implements safety check to tested target.

21. 1 kinds of method of samplings, wherein use if the sampling apparatus according to any one of aforementioned claim 13-19 is to tested destination sample.