JPH04218747A - Method and apparatus for inspecting cargo in container - Google Patents

Abstract

PURPOSE:To efficiently collect the sample such as an explosive compound or drugs suspended within a container by inserting an air suction pipe in the lower part of the container to suck the fine particles scattered from the cargo in the container along with air. CONSTITUTION:For example, air suction pipes 4, 4' with an inner diameter of about 25mm are inserted in the lower part of a container 1 packed with cargos 3 up to the vicinity of the inlet thereof and one ends thereof are thrown into one pipe to be attached to a filter fixing device having a filter 5 built therein. When a pump 7 is operated, the flow of air is generated in the gap part 6 of the inner wall of the container 1 and the gaps between the cargos 3 through the suction pipes 4, 4' and the fine particles of a sample 2 being an object to be measured suspended in air are sucked along with air to be bonded and collected on the filter through the suction pipes 4, 4'. By this constitution, the flow of air can be effectively formed even when the container 1 is packed with the cargoes 3 up to the inner wall thereof and the sample in the container 1 can be collected.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a collection method and device for collecting dust inside a container without taking out the cargo inside the container, and relates to a collection method and device for collecting dust in a container without taking out the cargo inside the container. This makes it possible to manage and detect pollutants and dangerous substances through collection and analysis, and is useful in areas such as improving the efficiency of inspection work and managing the safety of people involved in this work.

[Conventional technology] In recent years, there has been development of technology for collecting atmospheric samples in solutions in order to analyze and measure minute amounts of explosives, pesticides, pollutants, etc. present in the atmosphere or in cargo and baggage. It is requested. In particular, we need to prevent and control the illegal bringing of special drugs into the country, which has recently become popular, and suppress the illegal bringing of explosives onto planes.
Furthermore, there is a demand for a technique for collecting trace components in the atmosphere for environmental problems such as measuring pesticides and pollutants.

In other words, explosives and drugs are often transported hidden in other cargo or baggage, and it is nearly impossible to inspect all of these cargoes and baggage individually. Drug testing dogs are also used to detect drugs, but it is difficult to test them all.

One possible method for collecting small amounts of dust inside a container is to insert an air suction port near the entrance of the container or at the top of the cargo to collect dust in the air inside the container.

[Problems to be Solved by the Invention] However, in many cases, there is a problem in that the collection efficiency is extremely low if suction is only performed near the entrance of the container or from the top of the cargo.

In order to solve the problems of the prior art described above, it is an object of the present invention to provide a technique for efficiently collecting samples of explosives, drugs, etc. from inside a container.

[Means for Solving the Problems] In order to achieve the above object, a method for inspecting cargo in a container according to the present invention is a method for collecting and inspecting fine particles scattered from cargo in a container together with the air, An air suction tube is inserted into the lower part of the interior to collect the sample, which is a substance to be measured floating in the air.The air inside the container is sucked through the air suction tube, and the air is deposited on the filter and captured. It is characterized by gathering.

In the method of the present invention, the cross-sectional shape of the air suction tube is
A configuration in which the shape is elongated in the vertical direction can also be adopted.

Further, in the method of the present invention, it is also possible to employ a configuration in which the suction port of the air suction tube is formed in the shape of an elongated slit in the length direction of the tube, and a plurality of suction ports are formed.

Further, in the method of the present invention, a configuration in which air is sucked while moving the air suction tube back and forth can also be adopted.

In the method of the present invention, a high-pressure gas pipe for releasing compressed inert gas is inserted into the container, and the gas is released through the high-pressure gas pipe, stirring the air or stripping off the sample attached to the surface of the cargo. It is also possible to adopt a configuration in which air inside the container is sucked through an air suction pipe.

Further, in the method of the present invention, a configuration may be adopted in which there are a plurality of gas discharge ports for discharging high-pressure inert gas in the length direction of the high-pressure gas pipe.

Further, in the method of the present invention, it is also possible to adopt a configuration in which the air suction tube is moved back and forth, and air is sucked while rotating or moving the gas gun for discharging high-pressure gas back and forth and left and right.

Further, the inspection device for cargo inside a container of the present invention is a device that collects and inspects fine particles scattered from cargo inside the container together with air, and includes an air suction pipe inserted into a space inside the container, and the air suction pipe. It is characterized by comprising a suction means for suctioning the air inside the container through the container, and a filter for collecting fine particles in the suctioned air.

[Operation] According to the configuration of the method of the present invention, an air suction tube for collecting a sample, which is a substance to be measured floating in the air, is inserted into the lower part of the inside of the container, and the sample is passed through the air suction tube. Since the air inside the container is sucked and collected by adhering to the filter, samples such as explosives and drugs can be efficiently collected from inside the container.

Further, according to a preferred configuration of the present invention in which the cross-sectional shape of the air suction tube is elongated in the vertical direction, it can be easily inserted into the gap between the inner wall of the container and the cargo.

Further, according to a preferred configuration of the present invention in which the suction port of the air suction tube is formed in the shape of an elongated slit in the length direction of the tube, and a plurality of suction ports are formed, the sample coming out into the air can be efficiently suctioned. be able to.

Further, according to the preferred configuration of the present invention in which air is sucked while moving the air suction tube back and forth, the suction flow can be disturbed, and the sample coming out into the air can be sucked more efficiently. .

In addition, a high-pressure gas pipe for releasing compressed inert gas is inserted inside the container, and the gas is released through the high-pressure gas pipe. According to the preferred configuration of the present invention in which the air inside the container is sucked, the sample inside the container can be scattered into the air, thereby making it possible to suck the sample more efficiently.

In addition, there is a gas release port for releasing high pressure inert gas.
According to the preferred configuration of the present invention in which there are a plurality of high-pressure gas pipes in the length direction, the sample can be scattered in the air over a wider area inside the container.

In addition, according to the preferred configuration of the present invention, in which air is sucked while moving the air suction pipe back and forth and rotating or moving the gas gun for releasing high-pressure gas back and forth and left and right, the area inside the container can be further expanded. The sample can be dispersed into the air.

Further, according to the device of the present invention, an air suction tube inserted into a space inside the container, a suction means for sucking air inside the container through the air suction tube, and a filter for collecting fine particles in the sucked air. Since the apparatus is equipped with the following, it can be a useful apparatus for carrying out the method of the present invention.

[Example] The collection method and collection device of the present invention will be described in more detail with reference to Examples.

1 and 2 show one embodiment of the present invention. That is, FIG. 1 is a schematic sectional view of the inside of the container, and FIG. 2 is a side view of the same. Container 1 (depth 6m x width 2)
．． 4m x height 2.4m) open the door, and place the sample 2 (about 1 micron diameter T
3mg of NT gunpowder powder), and put baggage 3 (cardboard box:
(1m long, 1.1m wide, 1.05m high) were packed up to the container entrance. After that, one end of each of the two air suction tubes 4 and 4' (outer diameter: 27 mm, inner diameter 25 mm, length: 7 m) was combined into one tube, and this was then attached to a filter fixing device (stainless steel, 30 cm x 30 cm). ×50
cm), and the other end of each was passed through the gap 6 between the side of the container and the cargo 3, and inserted all the way to the back.

The tip of the air suction tube 4 was placed in almost intimate contact with the floor.

By operating the pump 7 (flow rate: 1400 l/min) for 10 min, air flow was generated around the inner wall gap 6 of the container 1 and between the cargo 3 through the air suction pipe 4. Due to this air flow, the sample 2 placed between the inner wall of the container 1 and the baggage 3 passes through the air suction tube 4 and passes through the filter 5 (made of polytetrafluoroethylene, 25 cm x 25 cm) inside the filter fixture. , pore size: 74 μm), it was possible to collect 2.0 mg. This recovery rate was about 66%.

In the above examples, the cross-sectional shape of the air suction tube for collecting the sample was circular, but in order to be able to insert it even into narrow gaps, and to increase the air flow rate, it was made elongated in the vertical direction. It has been advantageous to use a cross-sectional air suction tube.

Furthermore, collection was made easier by sucking air while moving the air suction tube for collecting the sample back and forth.

Further, by providing a plurality of suction ports of the air suction tube for collecting the sample, which are elongated in the length direction of the tube, more efficient collection was possible.

In order to further enhance the effect of the above embodiment, a high pressure gas pipe 9 for discharging compressed inert gas is inserted into the container, and air is injected from a gas gun 8 at the tip to agitate the air or apply it to the surface of the cargo. If the air inside the container is collected through the air suction tube while peeling off the attached sample, it is possible to collect 2.5 mg under the above experimental conditions, and the recovery rate is 7.
This has improved to 5%. Therefore, it was found that this method is an even better method for inspecting cargo inside a container.

In addition, the gas gun outlet for releasing inert gas is
By providing multiple high-pressure gas pipes 9 in the length direction, moving the air suction pipe back and forth, and rotating the gas gun or moving it back and forth, the operating time can be reduced to about 5 minutes. This makes it easier to inspect cargo inside containers.

In the above examples, TNT powder was used as the substance to be measured, but other similar dust particles such as explosives, narcotics, agricultural chemicals, and pollutants could also be similarly collected.

As described above, according to this embodiment, even if the container is packed with cargo, there is always some gap along the left and right inner walls of the container. Hold a gathering. In order to perform collection even more effectively, a gas gun for releasing compressed inert gas is inserted into the container, and while stirring the air or stripping off the sample attached to the surface of the cargo, air is drawn through the air suction tube. aspirate. By inserting a pipe with an outer diameter of about 3 cm into the lower part of the inner wall of the container and releasing compressed gas, it is possible to efficiently create air flow even when the inner wall of the container is filled with cargo. It can collect dust inside.

[Effects of the Invention] As described above, according to the present invention, the air suction pipe is inserted into the gap at the bottom of the container from the entrance of the container to remove dust between the inner wall of the container and the cargo such as a cardboard box, or between the cargo. This makes it possible to efficiently create an air flow and collect dust inside the container even when the container is packed almost up to the side walls.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are schematic diagrams of a dust collection device in one embodiment of the present invention. 1... Container, 2... Sample, 3... Baggage, 4... Air suction tube,
5... Filter, 6... Gap in the inner wall of the container, 7... Pump, 8... Gas gun, 9... High pressure gas pipe.

Claims (8)

[Claims] [Claim 1] A method for collecting and inspecting fine particles scattered from cargo inside a container together with the air, in which a sample, which is a substance to be measured suspended in the air, is collected in the lower part of the interior of the container. A method for inspecting cargo inside a container, which comprises: inserting an air suction tube for the air suction, sucking air inside the container through the air suction tube, and collecting the air by adhering it to a filter. 2. The method for inspecting cargo in a container according to claim 1, wherein the cross-sectional shape of the air suction pipe is vertically elongated. 3. The method for inspecting cargo in a container according to claim 1, wherein the air suction tube has a plurality of suction ports formed in the shape of elongated slits in the length direction of the tube. 4. The method for inspecting cargo in a container according to claim 1, wherein air is sucked while moving the air suction tube back and forth. 5. A high-pressure gas pipe for releasing compressed inert gas is inserted inside the container, and the gas is released through the high-pressure gas pipe, and the air is sucked while stirring the air or stripping off the sample attached to the surface of the cargo. 2. The method for inspecting cargo in a container according to claim 1, wherein air inside the container is sucked through a pipe. 6. The method for inspecting cargo in a container according to claim 5, wherein a plurality of gas discharge ports for discharging the high-pressure inert gas are provided in the length direction of the high-pressure gas pipe. 7. The method for inspecting cargo in a container according to claim 5, wherein air is sucked while moving the air suction pipe back and forth and rotating or moving a gas gun for discharging high-pressure gas back and forth and left and right. 8. A device for collecting and inspecting fine particles scattered from cargo inside a container along with air, comprising: an air suction tube inserted into a space inside the container; and sucking air inside the container through the air suction tube. 1. An inspection device for cargo inside a container, characterized by comprising a suction means for collecting air particles, and a filter for collecting fine particles in the sucked air.