Analysis system

Abstract

Provided is an analysis system, comprising: an analysis module adapted to detect and / or analyze a gas to be measured; a selection module adapted to select an operating mode of the analysis module; and a motive gas supply module disposed outside the analysis module. The motive gas supply module includes: a gas source adapted to provide motive gas for driving the movement of gas in the pipeline of the analysis system; and an exhaust gas purification and balancing device adapted to purify the exhaust gas from the analysis module into clean gas and use the clean gas to balance the air pressure between the analysis module and the external pipeline. The exhaust gas purification and balancing device is used to achieve the air pressure balance and isolation in the gas path of the analysis system, with little influence from the external air pressure, little impact on the ion mobility spectrometer and mass spectrometer in the analysis module due to the sample injection of the detected gas, and an increase in the amount of effective data.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to an analysis system, and particularly to an analysis system for detecting a sample in multiple ways. Background Art

[0002] Currently, an analysis system based on the technology of cluster gas chromatography tandem ion mobility spectrometry can basically meet the rapid non-opening inspection work of animals, plants, and foods at the passenger inspection and cargo inspection channels of customs. In such an analysis system, through the preliminary separation by chromatography and then the secondary separation by the ion mobility system, the analyte will obtain two-dimensional data composed of the retention time and the migration time. Since the polarities of different substances and the collision cross-sectional areas of ions are not exactly the same, a good distinction will be obtained.

[0003] However, in the above analysis system, the direct suction injection scheme will cause fluctuations in the air pressure of the analysis gas path, resulting in data interference. In addition, due to the limitation of the resolution, the peak capacity is limited, and signal superposition and interference phenomena often occur when facing complex odors. Summary of the Invention

[0004] The purpose of the present disclosure is to solve at least one of the above problems and defects existing in the prior art.

[0005] According to an embodiment of one aspect of the present disclosure, there is provided an analysis system, including: an analysis module adapted to detect and / or analyze a gas to be measured; a selection module adapted to select an operating mode of the analysis module; and a motive gas supply module disposed outside the analysis module. The motive gas supply module includes: a gas source adapted to provide motive gas for driving the movement of gas in the pipeline of the analysis system; and an exhaust gas purification and balancing device adapted to purify the exhaust gas from the analysis module into clean gas and use the clean gas to balance the air pressure between the analysis module and the external pipeline.

[0006] According to an embodiment of the present disclosure, the exhaust gas purification and balancing device includes: a housing, and an exhaust gas inlet, an exhaust gas outlet, a clean gas inlet, and a clean gas outlet communicated with the inside of the housing; an input pipe, the first end of the input pipe being communicated with the exhaust gas inlet; and an output pipe, the first end of the output pipe being communicated with the exhaust gas outlet, the second end of the input pipe partially overlapping with the second end of the output pipe and there being a gap therebetween to allow the clean gas from the clean gas inlet to flow into the output pipe through the gap.

[0007] According to an embodiment of the present disclosure, the housing includes a cylinder body and two sealing covers installed at both ends of the cylinder body. The exhaust gas inlet and the clean gas outlet are disposed on one of the two sealing covers, and the exhaust gas outlet and the clean gas inlet are disposed on the other of the two sealing covers.

[0008] According to an embodiment of the present disclosure, the exhaust gas purification and balancing device further includes a first pump and a first filter connected between the exhaust gas outlet and the clean gas inlet. The exhaust gas sucked out from the exhaust gas outlet is filtered into clean gas by the first filter and then input to the clean gas inlet.

[0009] According to an embodiment of the present disclosure, the analysis module includes: a connection disk, the detection gas is input into the connection disk; an ion mobility spectrometer, which is suitable for receiving the detection gas from the connection disk; and a mass spectrometer, which is suitable for receiving the detection gas from the connection disk.

[0010] According to an embodiment of the present disclosure, the exhaust gas discharged from the exhaust gas outlets of the ion mobility spectrometer and the mass spectrometer is transported to the exhaust gas inlet of the exhaust gas purification and balancing device by a first boost pump.

[0011] According to an embodiment of the present disclosure, the clean gas outlet of the exhaust gas purification and balancing device is communicated with the migration gas inlet of the ion mobility spectrometer through a flow distribution gas resistance.

[0012] According to an embodiment of the present disclosure, the gas source includes a high-pressure buffer chamber, and the high-pressure buffer chamber is communicated with the exhaust gas inlet of the exhaust gas purification and balancing device through a first stop valve.

[0013] According to an embodiment of the present disclosure, the selection module includes a plurality of two-position three-way valves. By switching the conduction state of at least one two-position three-way valve among the plurality of two-position three-way valves, the working mode of the analysis system is selected.

[0014] According to an embodiment of the present disclosure, the selection module is suitable for selecting the analysis system to perform the detection of the sampled gas and the detection of the sample to be measured adsorbed on the wiping paper.

[0015] According to an embodiment of the present disclosure, the selection module is suitable for selecting the analysis system to perform the fast detection working mode of the sampled gas. During the fast detection working mode, the sampled gas is transported to the central connection disk of the analysis module by the airflow of the clean gas from the clean gas outlet of the exhaust gas purification and balancing device, and the ion mobility spectrometer and / or the mass spectrometer are used to detect the sampled gas.

[0016] According to an embodiment of the present disclosure, the selection module is suitable for selecting the analysis system to perform the fine detection working mode of the sampled gas. During the fine detection working mode, the sampled gas is transported to the central connection disk of the analysis module by the airflow of the clean gas from the clean gas outlet of the exhaust gas purification and balancing device through the chromatographic column, and the ion mobility spectrometer and / or the mass spectrometer are used to perform the fine detection of the sampled gas.

[0017] According to an embodiment of the present disclosure, the selection module further includes a wiping injection port, which is divided into an upper gas path and a lower gas path by a semi-permeable membrane. The upper gas path is adapted to accommodate a test paper adsorbed with a sample to be measured, and the adsorbed sample to be measured is converted into a detection gas by heating. One end of the lower gas path is operably connected to the clean gas outlet of the waste gas purification and balancing device, and the other end of the lower gas path is connected to a connection disk through a three-way joint.

[0018] According to an embodiment of the present disclosure, the selection module is adapted to select the analysis system to perform a wiping injection working mode for the test paper. During the wiping injection working mode, the sampling gas is purged by the airflow of the clean gas from the clean gas outlet of the waste gas purification and balancing device to the detection gas in the lower gas path of the semi-permeable membrane to the connection disk, and the detection gas generated by the wiping paper is detected by a mass spectrometer and / or an ion mobility spectrometer.

[0019] According to an embodiment of the present disclosure, the selection module is adapted to select the analysis system to perform a standby working mode. During the standby working mode, the clean gas from the high-pressure buffer chamber enters the waste gas purification and balancing device from the waste gas inlet of the waste gas purification and balancing device, and a part of the first part of the clean gas discharged from the clean gas outlet of the waste gas purification and balancing device reaches the analysis module through a part of the plurality of two-way three-way valves and the chromatographic column.

[0020] According to an embodiment of the present disclosure, the gas source further includes a first pressure transmitter adapted to detect the air pressure in the waste gas purification and balancing device. During the standby working mode, the first cut-off valve is selectively opened and closed by the electronic control system according to the pressure in the waste gas purification and balancing device measured by the first pressure transmitter to keep the air pressure at the starting point of the gas path within the working condition range.

[0021] According to an embodiment of the present disclosure, the gas source further includes a vacuum buffer chamber communicated with the analysis module, and the selection module is adapted to select the analysis system to perform a sample loading and air pressure matching tooling mode. During the sample loading and air pressure matching working mode, the negative pressure of the vacuum buffer chamber directly sucks the sampling gas into the pipeline between the first two-way three-way valve and the fourth two-way three-way valve of the selection module, and the air pressure of the sampling gas is matched with the air pressure of the analysis module.

[0022] According to an embodiment of the present disclosure, the selection module is adapted to select the analysis system to perform a rapid cleaning working mode for the gas injection pipeline. During the rapid cleaning working mode of the gas injection pipeline, the sampling gas injection pipeline of the selection module is in an open state and physically isolated from the analysis module, and the high-pressure clean gas in the high-pressure buffer chamber forms a high-speed airflow to backflush the residual sampling gas in the sample tube through the injection pipeline.

[0023] According to an embodiment of the present disclosure, the selection module is adapted to select the analysis system to execute the wiping inlet cleaning working mode. During the wiping inlet cleaning working mode, the high-pressure clean gas in the high-pressure buffer chamber purges the upper gas path of the wiping inlet.

[0024] According to an embodiment of the present disclosure, the analysis system further includes a calibration module, and the calibration module includes: a calibration tank adapted to accommodate or generate a standard gas; an eighth two-way three-way valve connected between the high-pressure buffer chamber and the calibration tank; and a third shut-off valve connected between the selection module and the calibration tank.

[0025] According to an embodiment of the present disclosure, the selection module is adapted to select the analysis system to execute the calibration working mode. During the calibration working mode, the high-pressure clean gas in the high-pressure buffer chamber flows through the calibration tank and carries the standard gas in the calibration tank into the pipeline between the first two-way three-way valve and the fourth two-way three-way valve of the selection module. The standard gas is transported by the airflow of the clean gas from the clean gas outlet of the waste gas purification and balancing device to the central connection plate of the analysis module, and the ion mobility spectrometer and / or mass spectrometer are used to detect and calibrate the standard gas. Description of the Drawings

[0026] Figure 1 The schematic block diagram of the analysis system according to an exemplary embodiment of the present disclosure is shown; and

[0027] Figure 2 The simple schematic diagram of the waste gas purification and balancing device according to an exemplary embodiment of the present disclosure is shown. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way limits the present disclosure, its application, or its use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts fall within the scope of the present disclosure.

[0029] In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present disclosure. It will 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 in order to simplify the drawings. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be considered as part of the authorization specification.

[0030] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is merely for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning and thus should not be construed as limiting the scope of protection of the present disclosure.

[0031] According to a general inventive concept of the present disclosure, there is provided an analysis system including: an analysis module adapted to detect and / or analyze a gas to be measured; a selection module adapted to select an operating mode of the analysis module; and a motive gas supply module disposed outside the analysis module, the motive gas supply module including: a gas source adapted to provide a motive gas for driving the movement of gas in the pipeline of the analysis system; and an exhaust gas purification and balancing device adapted to purify the exhaust gas from the analysis module into clean gas and balance the air pressure between the analysis module and the external pipeline using the clean gas.

[0032] According to an embodiment of the present disclosure, there is provided an analysis system adapted to detect dangerous substances such as toxic and harmful gases, fumigants, highly flammable gases, trace drugs, explosives, etc. in places such as public security, justice, prisons, customs, border control, anti-smuggling and drug suppression, airports, important government agencies, important security agencies, military bases, consulates, passages of important person residences, important conference venues, etc.

[0033] Figure 1 A schematic block diagram of an analysis system according to an exemplary embodiment of the present disclosure is shown.

[0034] In one embodiment, as Figure 1As shown, the analysis system includes: an analysis module 300 suitable for detecting and / or analyzing a gas to be measured; a selection module 100 suitable for selecting the operating mode of the analysis module 300; and a motive gas supply module 400 disposed outside the analysis module 300. The motive gas supply module 400 includes a gas source and an exhaust gas purification and balancing device 401. The gas source is suitable for providing motive gas for driving the gas movement in the pipeline of the analysis system; and the exhaust gas purification and balancing device 401 is suitable for purifying the exhaust gas from the analysis module 300 into clean gas and using the clean gas to balance the air pressure between the analysis module 300 and the external pipeline.

[0035] In an exemplary embodiment, the analysis module 300 includes a connection disk 305, an ion mobility spectrometer (Ion Mobility Spectrometry, IMS), and a mass spectrometer 310. The detection gas to be detected is input into the connection disk 305; the ion mobility spectrometer is suitable for receiving the detection gas from the connection disk 305. The mass spectrometer 310 is suitable for receiving the detection gas from the connection disk 305. The ion mobility spectrometer includes, for example, a cation mobility spectrometer 306 and an anion mobility spectrometer 307, and an integrated ceramic dual-mode migration tube can be used, for example. According to actual needs, a dual migration tube or a dual migration tube dual mass analyzer solution can be used to achieve simultaneous positive and negative mode detection. The ion mobility spectrometer has the advantages of being portable, fast, sensitive, and industrializable, and is widely used in measuring the presence and dose of toxic and harmful gases and / or hazardous chemicals. In one embodiment, see Figure 1 , the analysis module 300 further includes a chromatographic column 301 communicating with the connection disk 305, such as a bundle capillary chromatographic column.

[0036] Figure 2 Shows a simplified schematic diagram of the exhaust gas purification and balancing device of an exemplary embodiment of the present disclosure.

[0037] In an exemplary embodiment, the exhaust gas purification and balancing device 401 includes: a housing, and an exhaust gas inlet 4014, an exhaust gas outlet 4016, a clean gas inlet 4017, a clean gas outlet 4013, an input pipe 4011, and an output pipe 4012 communicating with the inside of the housing. The first end ( Figure 2 the left end in Figure 2 ) of the input pipe 4011 communicates with the exhaust gas inlet 4014. The first end ( Figure 2 the right end in Figure 2 ) of the output pipe 4012 communicates with the exhaust gas outlet 4016. The second end ( Figure 2 the right end in Figure 2 ) of the input pipe 4011 partially overlaps with the second end ( Figure 2 the left end in ) of the output pipe 4012 and there is a gap therebetween to allow the clean gas from the clean gas inlet 4017 to flow into the output pipe 4012 through the gap.

[0038] In an exemplary embodiment, as Figure 2 shown, the housing includes a cylinder body 4018 and two sealing covers 4019 mounted at both ends of the cylinder body 4018. Generally, the materials for making the cylinder body and the sealing covers have sufficient rigidity and do not emit odors that interfere with detection, such as, but not limited to, polytetrafluoroethylene, stainless steel, etc. The exhaust gas inlet 4014 and the clean gas outlet 4013 are provided on one of the two sealing covers (e.g., Figure 2 the left sealing cover in Figure 2 ), and the exhaust gas outlet 4016 and the clean gas inlet 4017 are provided on the other of the two sealing covers (e.g.,

[0039] the right sealing cover in

[0040] In one embodiment, the exhaust gas purification and balancing device 401 further includes a first pump 402 and a first filter 403 connected between the exhaust gas outlet 4016 and the clean gas inlet 4017. The exhaust gas sucked out from the exhaust gas outlet is filtered into clean gas by the first filter and then input to the clean gas inlet, so as to realize the recovery and purification of the exhaust gas. The first pump 402 can be a plunger pump or a diaphragm pump.In one embodiment, the input pipe 4011 and the output pipe 4012 of the exhaust gas inlet 4014 and the exhaust gas outlet 4016 for conveying exhaust gas are aligned in the flow direction of the exhaust gas. The clean gas inlet 4017 is arranged near the exhaust gas outlet 4016, for example, both are arranged on the sealing cover 4019 on the right side, so as to reduce the dead volume of the chamber in the housing and reduce the cleaning time during startup. During operation, the exhaust gas is injected from the exhaust gas inlet 4014 and passes through the sleeve structure formed by the partially overlapping input pipe 4011 and output pipe 4012, and is discharged from the exhaust gas outlet 4016. The innermost layer of this sleeve structure is for the exhaust gas to flow through. By controlling the difference between the diameters of the input pipe 4011 and the output pipe 4012 and their overlapping length, the air pressure impact brought by the first pump 402 on the active exhaust gas recovery is adjusted. During the exhaust gas recovery process, the exhaust gas recovery flow rate needs to be greater than the exhaust gas inflow rate. At this time, an air flow will be generated at the overlapping part of the input pipe 4011 and the output pipe 4012 and flow towards the first pump 402. At the same time, the clean gas in the chamber of the housing will supplement the lacking exhaust gas intake flow rate and completely inhibit the exhaust gas from diffusing into the chambers outside the input pipe 4011 and the output pipe 4012. The exhaust gas passes through the first filter 403 and then returns to the chamber in the housing from the clean gas inlet 4017, completing the filtration process of the exhaust gas. Due to the automatic compensation of the gas flow rate at the overlapping part of the input pipe 4011 and the output pipe 4012, that is to say, the insufficient air flow in the output pipe can be supplemented by the clean gas. Therefore, the change in the gas flow rate at the exhaust gas outlet 4016 will not greatly affect the exhaust gas flow in the exhaust gas inlet 4014, stabilizing the gas flow rate in the whole device and ensuring that the exhaust gas completely passes through the first filter 403.

[0041] In one embodiment, referring to Figure 1 , the exhaust gas discharged from the exhaust gas outlets 311, 309 of the ion mobility spectrometers 306, 307 and the exhaust gas outlet of the mass spectrometer 310 flows into the buffer chamber 313, and is then conveyed to the exhaust gas inlet 4014 of the exhaust gas purification and balancing device 401 through the first booster pump 405 to be purified into clean gas in the exhaust gas purification and balancing device 401. A second pressure transmitter 314 is provided on the buffer chamber 313 to detect the air pressure at the exhaust gas outlets 311, 309 of the ion mobility spectrometers 306, 307 and the exhaust gas outlet of the mass spectrometer 310.

[0042] In one embodiment, the clean gas outlet 4013 of the exhaust gas purification and balancing device 401 is communicated with the migration gas inlet of the ion mobility spectrometer through a tee 409 and flow distribution air resistors 308, 312.

[0043] In one embodiment, the gas source includes a high-pressure buffer chamber 410, a first cut-off valve 404 disposed between the high-pressure buffer chamber 410 and the waste gas inlet 4014 of the waste gas purification and balancing device, and a first pressure transmitter 416 adapted to detect the air pressure in the waste gas purification and balancing device 401. The high-pressure buffer chamber is communicated with the waste gas inlet 4014 of the waste gas purification and balancing device 401 through the first cut-off valve 404. The pump 412 supplies pressurized clean gas into the high-pressure buffer chamber 410 through the filter 411. The clean gas from the high-pressure buffer chamber flows through the first cut-off valve 404 to the waste gas purification and balancing device 401 to clean some components of the analysis system. A tee 406 is provided at the first booster pump 405, the first cut-off valve 404 and the waste gas inlet 4014. By adjusting the rotation speed of the first booster pump 405 using the electronic control system and selectively operating the first cut-off valve 404 during non-analysis periods, the high-pressure clean gas in the high-pressure buffer chamber 410 is supplemented to the gas path to complete the isolation of the analysis system from the external air pressure.

[0044] In one embodiment, the selection module 100 further includes a wiping injection port 108. The wiping injection port is divided into an upper gas path and a lower gas path by a semi-permeable membrane. The upper gas path is adapted to accommodate a test paper adsorbed with a sample to be measured and convert the adsorbed sample to be measured into a detection gas by heating. One end of the lower gas path is operably communicated with the clean gas outlet of the waste gas purification and balancing device, and the other end of the lower gas path is communicated with the connection disk through a tee 112.

[0045] In one embodiment, referring to Figure 1 , the selection module 100 includes a plurality of two-way three-way valves. By switching the conduction state of at least one of the plurality of two-way three-way valves, the working mode of the analysis system is selected. Specifically, the plurality of two-way three-way valves include a first two-way three-way valve 101, a second two-way three-way valve 102, a third two-way three-way valve 103, a fourth two-way three-way valve 104, a fifth two-way three-way valve 105, a sixth two-way three-way valve 106, and a seventh two-way three-way valve 107. The first two-way three-way valve 101 receives the sampling gas at port 1. The common port of the first two-way three-way valve 101 is communicated with the common port of the second two-way three-way valve 102. The port 0 of the second two-way three-way valve 102 is communicated with the common port of the third two-way three-way valve 103. The port 1 of the second two-way three-way valve 102 is communicated with the connection disk 305 through a tee 304, and one port of the tee 304 is connected to the connection disk 305. The port 1 of the third two-way three-way valve 103 is communicated with the common port of the fourth two-way three-way valve 104. The port 0 of the third two-way three-way valve 103 is communicated with the chromatographic column 301 through a four-way 303. A third pressure transmitter 302 is provided at one port of the four-way 303 to detect the air pressure at the chromatographic column inlet.

[0046] Further, the common port of the sixth two-position three-way valve 106 is communicated with the clean gas outlet 4013 of the exhaust gas purification and balancing device 401 through the second filter 415, the buffer 407 and the second boost pump 408 to receive a part of the clean gas from the clean gas outlet. The common port of the fifth two-position three-way valve 105 is communicated with the clean gas outlet 4013 of the exhaust gas purification and balancing device 401 through the tee 111 to receive a part of the clean gas from the clean gas outlet, and the port 1 of the fifth two-position three-way valve 105 is connected to the tee 304. The common port of the seventh two-position three-way valve 107 is communicated with the clean gas outlet 4013 of the exhaust gas purification and balancing device 401 through the air resistance 110 and the tee 111 to receive a part of the clean gas from the clean gas outlet. The port 1 of the sixth two-position three-way valve 106, the port 0 of the fifth two-position three-way valve 105 and the port 0 of the first two-position three-way valve 101 are communicated with each other through the tee 109, and the port 0 of the sixth two-position three-way valve 106 is connected to the four-way 303. The port 0 of the seventh two-position three-way valve 107 is connected to the lower gas path of the wiping injection port 108, and a tee 112 is provided between the port 1 of the seventh two-position three-way valve 107, the lower gas path of the wiping injection port 108 and the connection plate 305.

[0047] In one embodiment, referring to Figure 1 , the gas source further includes a vacuum buffer chamber 413 communicated with the port 1 of the fourth two-position three-way valve 104 of the analysis module through a tee 207, and a vacuum is formed in the vacuum buffer chamber 413 by a vacuum pump 414. The analysis system further includes a calibration module 200, and the calibration module includes: a calibration tank 202 suitable for accommodating a standard gas; an eighth two-position three-way valve 201 connected between the high-pressure buffer chamber 410 and the calibration tank 202, that is, the high-pressure buffer chamber 410 is connected to the common port of the eighth two-position three-way valve 201, and the port 1 of the eighth two-position three-way valve 201 is connected to the calibration tank 202; and a third shut-off valve 206 connected between the port 1 of the fourth two-position three-way valve 104 of the selection module 100 and the calibration tank through a tee 207. A second shut-off valve 205, an air resistance 204 and a four-way 203 are sequentially connected between the upper gas path of the wiping injection port 108 and the calibration tank 202, and the port 0 of the eighth two-position three-way valve 201 is communicated with the port 0 of the fourth two-position three-way valve 104 through the four-way 203.

[0048] In the analysis system according to the embodiments of the present disclosure, the air flow power is mainly provided by the first booster pump 405 and the second booster pump 408. A part of the clean gas output from the clean gas outlet 4013 of the waste gas purification and balancing device 401 is output to the fifth two-way three-way valve 105 and the seventh two-way three-way valve 107 to provide carrier gas for sample injection and rapid detection to the wiping injection port 108. Another part of the clean gas output from the clean gas outlet 4013 of the waste gas purification and balancing device 401 is input into the ion mobility spectrometer through the flow distribution gas resistances 312 and 308 for air flow balancing to form migration gas. The last part of the clean gas output from the clean gas outlet 4013 of the waste gas purification and balancing device 401 is boosted by the second booster pump 408 and then secondarily filtered at the filter 415 to form clean high-pressure carrier gas to match the gas resistance of the cluster capillary chromatographic column 301 in the fine detection gas path. The central connection disk 305 receives the sampling gas from the first two-way three-way valve 101 or the vaporized sampling gas from the wiping injection port 108, and the detection gas is distributed to the migration tubes on both sides of the connection disk 305 and the mass spectrometer 310 below. After the detection is completed, the exhausted waste gas is respectively injected into the buffer chamber 313 from the waste gas outlets 311 and 309 for air flow balancing of the ion mobility spectrometers 306 and 307, and the waste gas outlet of the mass spectrometer 310. Finally, the exhausted waste gas is boosted by the first booster pump 405 and then reversely injected into the waste gas inlet 4014 of the waste gas purification and balancing device 401 to complete the whole cycle.

[0049] In the gas path of the analysis system according to the embodiments of the present disclosure, the first pressure transmitter 416, the second pressure transmitter 314, and the third pressure transmitter 302 respectively monitor the pressure at the clean gas inlet, the pressure before the inlet of the chromatographic column 301, and the pressure at the outlet of the analysis module. The rotation speeds of the first booster pump 405 and the second booster pump 408 are adjusted through the electronic control system. At the same time, the first cut-off valve 404 is selectively opened during non-analysis periods to supplement the high-pressure clean air in the high-pressure buffer chamber 410 to the gas path, and the isolation of the entire analysis system from the external air pressure is completed. The high-pressure clean gas in the high-pressure buffer chamber 410 is obtained by compressing air with the pump 412 and filtering it through the filter 411. Since the filter 411 works under high air pressure, according to the Clausius-Clapeyron equation, its absorption efficiency is improved and its service life is extended. The vacuum used for sampling gas extraction is provided by the vacuum pump 414, and the vacuum buffer chamber 413 connected to the vacuum pump 414 reduces the power requirement for the vacuum pump 414 and can meet the intermittent sampling without reducing the sampling speed.

[0050] In one embodiment, the selection module 100 is adapted to select the analysis system to perform the detection of the sampling gas and the detection of the sample to be measured adsorbed on the wiping paper.

[0051] In one embodiment, the selection module 100 is adapted to select the analysis system to perform a rapid detection working mode on the sampled gas. During the rapid detection working mode, the sampled gas is transported by the gas flow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401 to the central connection disk 305 of the analysis module 300, and the detection of the sampled gas is realized by the ion mobility spectrometer 306 and / or 307 and / or the mass spectrometer 310.

[0052] In one embodiment, the selection module 100 is adapted to select the analysis system to perform a fine detection working mode on the sampled gas. During the fine detection working mode, the sampled gas is transported by the gas flow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401 through the chromatographic column 301 to the central connection disk 305 of the analysis module 300, and the fine detection of the sampled gas is realized by the ion mobility spectrometer 306 and / or 307 and / or the mass spectrometer 310.

[0053] In one embodiment, the selection module 100 is adapted to select the analysis system to perform a wiping injection working mode on the test paper. During the wiping injection working mode, the sampled gas is used by the gas flow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401 to purge the detection gas in the lower gas path of the semi-permeable membrane at the wiping injection port 108 to the connection disk 305, and the ion mobility spectrometer 306 and / or 307 and / or the mass spectrometer 310 detect the detection gas generated from the sample on the wiping paper.

[0054] In one embodiment, the selection module 100 is adapted to select the analysis system to perform a standby working mode. During the standby working mode, the clean gas from the high-pressure buffer chamber 410 enters the waste gas purification and balancing device 401 through the open first cut-off valve 404 from the waste gas inlet 4014 of the waste gas purification and balancing device 401, and a part of the first part of the clean gas discharged from the clean gas outlet 4013 of the waste gas purification and balancing device 401 reaches the analysis module 300 through a part of the plurality of two-position three-way valves (such as the sixth two-position three-way valve 106) and the chromatographic column 301.

[0055] In one embodiment, during the standby working mode, the first cut-off valve 404 is selectively opened and closed by the electronic control system according to the pressure in the waste gas purification and balancing device 401 measured by the first pressure transmitter 416 to keep the air pressure at the starting point of the gas path within the working condition range.

[0056] In one embodiment, the selection module 100 is adapted to select the analysis system to execute the sample loading and air pressure matching tooling mode. During the sample loading and air pressure matching tooling mode, the sampling gas is directly sucked into the pipeline between the first two-way three-way valve 101 and the fourth two-way three-way valve 104 of the selection module 100 by the negative pressure of the vacuum buffer chamber 413, and the air pressure of the sampling gas is matched with the air pressure of the analysis module 300.

[0057] In one embodiment, the selection module 100 is adapted to select the analysis system to execute the rapid cleaning working mode of the gas injection pipeline. During the rapid cleaning working mode of the gas injection pipeline, the sampling gas injection pipeline of the selection module 100 is in an open state and is physically isolated from the analysis module 300. The high-pressure clean gas in the high-pressure buffer chamber 410 forms a high-speed air flow and backwashes the residual sampling gas in the sample tube through the eighth two-way three-way valve 201 and the injection pipeline including the fourth two-way three-way valve 104, the third two-way three-way valve 103, the second two-way three-way valve 102 and the first two-way three-way valve 101.

[0058] In one embodiment, the selection module 100 is adapted to select the analysis system to execute the wiping inlet cleaning working mode. During the wiping inlet cleaning working mode, the high-pressure clean gas in the high-pressure buffer chamber 410 purges the upper gas path of the wiping inlet through the eighth two-way three-way valve 201, the four-way valve 203, the gas resistance 204 and the opened second stop valve 205.

[0059] In one embodiment, the selection module 100 is adapted to select the analysis system to execute the calibration working mode. During the calibration working mode, the high-pressure clean gas in the high-pressure buffer chamber 410 flows through the calibration tank 202 and carries the standard gas in the calibration tank into the pipeline between the first two-way three-way valve 101 and the fourth two-way three-way valve 104 of the selection module. The standard gas is transported to the central connection plate 305 of the analysis module 300 by the air flow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401, and the ion mobility spectrometer 306 and / or 307 and / or the mass spectrometer 310 are used to detect and calibrate the standard gas.

[0060] See reference Figure 1 , and the working modes of the analysis system according to the embodiments of the present disclosure are described in detail.

[0061] First, the analysis system is in the standby working mode. During the standby tooling mode, the first shut-off valve 404 is turned on, and all other shut-off valves are in the closed state. The first to eighth two-way three-way valves are all at port 0. At this time, the clean gas from the high-pressure buffer chamber 410 enters the waste gas purification and balancing device 401 through the waste gas inlet 4014 of the waste gas purification and balancing device 401, so that the waste gas purification and balancing device 401 does not perform gas purification operations. A part of the first part of the clean gas discharged from the clean gas outlet 4013 of the waste gas purification and balancing device 401 passes through the first three-way valve 111, the seventh two-way three-way valve 107, the first two-way three-way valve 101, the second two-way three-way valve 102, the third two-way three-way valve 103, the four-way valve 303, and the chromatographic column 301 and finally reaches the analysis module 300 to keep the system clean. The first shut-off valve 404 is selectively opened and closed by the electric control system according to the pressure in the waste gas purification and balancing device 401 measured by the first pressure transmitter 416 to keep the air pressure at the starting point of the gas path within the working condition range. The first shut-off valve 404 is only open during standby and cleaning operations.

[0062] After that, the analysis system enters the sample loading and air pressure matching tooling mode. During this tooling mode, the first two-way three-way valve 101, the third two-way three-way valve 103, and the fourth two-way three-way valve 104 are simultaneously switched to port 1; the vacuum pump 414 maintains the negative pressure in the vacuum buffer chamber 413, and directly sucks the sampling gas into the pipeline between the first two-way three-way valve 101 and the fourth two-way three-way valve 104 through the second three-way valve 207; after the sample loading is completed, the second two-way three-way valve 102 and the fifth two-way three-way valve 105 are simultaneously switched to port 1, and the remaining first two-way three-way valve 101, the third two-way three-way valve 103, the fourth two-way three-way valve 104, the sixth two-way three-way valve 106, and the seventh two-way three-way valve 107 are simultaneously switched to port 0. At this time, the internal gas path is connected but does not form a cycle. Therefore, the air pressure of the sampling gas is matched with the air pressure of the analysis module.

[0063] After that, the rapid detection tooling mode is executed. During this working mode, after the air pressure matching of the sampling gas and the analysis module is completed, the fifth two-way three-way valve 105 is switched to port 0, and the air flow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401 will flow through the pipeline between the first two-way three-way valve 101 and the second two-way three-way valve 102. The sampling gas is transported by the air flow of the clean gas to the central connection disk 305 of the analysis module 300, and the detection of the sampling gas is completed by the ion mobility spectrometer 306 and / or 307, and / or the mass spectrometer 310. It can be understood that during the rapid detection working mode, the detection gas input to the analysis module is the sampling gas.

[0064] After that, the fine detection working mode is executed. After the fast detection tooling mode is completed, the fifth two-way three-way valve 105 and the sixth two-way three-way valve 106 are switched to port 1, and at the same time, the second two-way three-way valve 102 is switched to port 0. At this time, the airflow of the cleaning gas pushes the sampling gas stored in the pipeline between the second two-way three-way valve 102 and the third two-way three-way valve 103 to enter the chromatographic column 301 through the four-way joint 303, such as a capillary column array. After the sampling gas is separated by the chromatographic column 301, it then enters the mass spectrometer 310 and / or the ion mobility spectrometer 306 and / or 307 through the connection plate 305 simultaneously, so as to realize the fine detection of the sampling gas. It can be understood that during the fine detection working mode, the detection gas input to the analysis module is the sampling gas.

[0065] After that, the fast cleaning working mode of the gas injection pipeline is executed. During this working mode, first, the delivery of the sampling gas is stopped. The first two-way three-way valve 101 and the fifth two-way three-way valve 105 are switched to port 1, and the second two-way three-way valve 102, the third two-way three-way valve 103, the fourth two-way three-way valve 104, the sixth two-way three-way valve 106, the seventh two-way three-way valve 107, and the eighth two-way three-way valve 201 are switched to port 0. At this time, the injection pipeline is in an open state and physically isolated from the analysis module; after that, the third two-way three-way valve 103 is switched to port 1, so that the sample pipeline is connected to the high-pressure buffer chamber 410 through the four-way joint 203. The high-pressure clean gas in the high-pressure buffer chamber 410 will form a high-speed airflow to backflush the residual sampling gas in the sample tube; after the cleaning is completed, all the two-way three-way valves are placed at port 0, thus ending the fast cleaning working mode of the gas injection pipeline.

[0066] The wiping injection working mode is executed. During the execution of the wiping injection working mode, the wiping injection port 108 suitable for receiving the wiping paper is divided into an upper gas path and a lower gas path by a semi-permeable membrane. The lower gas path is connected to the connection plate 305 through a three-way joint 112, and the upper gas path is open. During the test, the wiping paper is inserted into the upper gas path, and the second shut-off valve 205 (such as an electromagnetic shut-off valve) is in a closed state, and the seventh two-way three-way valve 107 is switched to port 1; the wiping injection port 108 is in a heated state and maintains a relatively high temperature, so that the sample to be measured adsorbed by the wiping paper volatilizes into the detection gas, and the detection gas freely diffuses into the cavity of the lower gas path of the wiping injection port 108; after the heating is completed, the seventh two-way three-way valve 107 is switched to port 0, so that the airflow of the cleaning gas from the cleaning gas outlet 4013 of the waste gas purification and balancing device 401 blows the detection gas located in the lower gas path of the semi-permeable membrane to the connection plate 305, and then enters the mass spectrometer 310 and the ion mobility spectrometer 306 and / or 307, so as to realize the detection of the detection gas generated by the wiping paper.

[0067] After that, execute the wiping inlet cleaning work mode. After executing the wiping injection work mode, remove the wiping paper in the wiping inlet 108, open the second shut-off valve 205, and switch the eighth two-way three-way valve 201 to port 0. The high-pressure clean gas in the high-pressure buffer chamber 410 purges the upper gas path of the wiping inlet 108 through the eighth two-way three-way valve 201, the calibration tank 202, the gas resistance 204, and the second shut-off valve 205 to complete the cleaning operation. After the cleaning is completed, close the second shut-off valve 205.

[0068] Execute the deep cleaning work mode. In the standby work mode, open the second shut-off valve 205, continuously purge the wiping inlet 108, and at the same time switch the first two-way three-way valve 101, the third two-way three-way valve 103, and the fourth two-way three-way valve 104 to port 1. Connect a low-pressure filter to port 1 of the first two-way three-way valve 101. At this time, the filtered clean gas will slowly flow through the entire injection pipeline and maintain a low air pressure to increase the volatilization rate of interfering odor molecules.

[0069] Those skilled in the art can understand that the execution steps of the detection mode for the sampling gas and the detection mode for the test sample on the test paper are not in a specific order.

[0070] Execute the calibration work mode. In the standby work mode, simultaneously switch the first two-way three-way valve 101, the third two-way three-way valve 103, and the eighth two-way three-way valve 201 to port 1. The high-pressure clean gas in the high-pressure buffer chamber 410 will flow through the calibration tank 202 and carry the standard gas in the calibration tank into the pipeline between the first two-way three-way valve 101, the second two-way three-way valve 102, the third two-way three-way valve 103, and the fourth two-way three-way valve 104 to complete the injection process of the standard gas. After the standard gas is injected, directly start the above-mentioned rapid detection tooling mode to analyze the standard gas. That is to say, the standard gas is transported by the airflow of the clean gas from the clean gas outlet 4013 of the waste gas purification and balancing device 401 to the central connection disk 305 of the analysis module 300, and the standard gas is detected and calibrated by the ion mobility spectrometer 306 and / or 307 and / or the mass spectrometer 310. After the analysis of the standard gas is completed, open the third shut-off valve 206 and simultaneously switch the eighth two-way three-way valve 201 to port 0. At this time, the standard gas output from the calibration tank 202 and remaining at the output port is sucked back to complete the cleaning of the pipeline between the four-way 203 connected to the calibration tank 202 and the eighth two-way three-way valve 201. After the cleaning is completed, close the third shut-off valve 206 and switch the first two-way three-way valve 101 and the third two-way three-way valve 103 to port 1. At this time, the high-pressure clean gas in the high-pressure buffer chamber 410 will purge the pipeline between the eighth two-way three-way valve 201 and the first two-way three-way valve 101 to complete the cleaning after calibration. After the cleaning is completed, all two-way three-way valves are switched to port 0 to maintain the standby state.

[0071] According to the analysis system provided by the above embodiments of the present disclosure, an exhaust gas purification and balancing device is adopted to achieve the air pressure balance and isolation in the gas path of the analysis system. It is less affected by the external air pressure, and the injection of the detected gas has little impact on the ion mobility spectrometer and the mass spectrometer in the analysis module, improving the effective data volume. The analysis system combines two technologies of ion mobility spectrometry and mass spectrometry and incorporates a fast chromatography separation technology at the same time. The number of distinguishable substances has been greatly improved compared with a single technology, and some isomer signals can be resolved. In addition, the non-electrically controlled exhaust gas purification and balancing device can implement an automatic air resistance balancing scheme for the filter, simplifying the manufacture of the filter and minimizing the change in the analysis air flow caused by the aging of the filter material, further stabilizing the signal peak position.

[0072] Those skilled in the art can understand that the above-described embodiments are all exemplary, and those skilled in the art can make improvements to them. The structures described in various embodiments can be freely combined without conflicts in structure or principle.

[0073] Although the present disclosure has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present disclosure and should not be construed as a limitation of the present disclosure. Although some embodiments of the inventive concept of the present disclosure have been shown and described, those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the overall inventive concept of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. An analysis system, comprising: An analysis module, adapted to detect and / or analyze a gas to be measured; A selection module, adapted to select the working mode of the analysis module; And A motive gas supply module, disposed outside the analysis module, and comprising: A gas source, adapted to provide motive gas for driving the movement of gas in the pipeline of the analysis system; and An exhaust gas purification and balancing device, adapted to purify the exhaust gas from the analysis module into clean gas and balance the air pressure between the analysis module and the external pipeline with the clean gas, the exhaust gas purification and balancing device comprising: A housing, and an exhaust gas inlet, an exhaust gas outlet, a clean gas inlet, and a clean gas outlet communicating with the inside of the housing; An input pipe, a first end of the input pipe communicating with the exhaust gas inlet; and An output pipe, a first end of the output pipe communicating with the exhaust gas outlet, a second end of the input pipe partially overlapping with a second end of the output pipe and having a gap therebetween to allow clean gas from the clean gas inlet to flow into the output pipe through the gap.

2. The analysis system according to claim 1, wherein The housing comprises a cylinder body and two sealing covers mounted at both ends of the cylinder body, The exhaust gas inlet and the clean gas outlet are provided on one of the two sealing covers, and the exhaust gas outlet and the clean gas inlet are provided on the other of the two sealing covers.

3. The analysis system according to claim 2, wherein, The exhaust gas purification and balancing device further comprises a first pump and a first filter connected between the exhaust gas outlet and the clean gas inlet, and the exhaust gas sucked out from the exhaust gas outlet and filtered into clean gas by the first filter is input to the clean gas inlet.

4. The analysis system according to any one of claims 1-3, wherein, The analysis module comprises: A connection disk, the detection gas is input into the connection disk; An ion mobility spectrometer, adapted to receive the detection gas from the connection disk; and A mass spectrometer, adapted to receive the detection gas from the connection disk.

5. The analysis system according to claim 4, wherein, The exhaust gas discharged from the exhaust gas outlets of the ion mobility spectrometer and the mass spectrometer is transported to the exhaust gas inlet of the exhaust gas purification and balancing device through a first boost pump.

6. The analysis system according to claim 5, wherein The clean gas outlet of the exhaust gas purification and balancing device is communicated with the migration gas inlet of the ion mobility spectrometer through a flow distribution air resistance.

7. The analysis system according to any one of claims 1-3, wherein, The gas source comprises a high-pressure buffer chamber, and the high-pressure buffer chamber is communicated with the exhaust gas inlet of the exhaust gas purification and balancing device through a first cut-off valve.

8. The analysis system according to claim 7, wherein, The selection module comprises a plurality of two-position three-way valves, and the working mode of the analysis system is selected by switching the conduction state of at least one two-position three-way valve among the plurality of two-position three-way valves.

9. The analysis system according to claim 8, wherein, The selection module is adapted to select the analysis system to perform the detection of the sampled gas and the detection of the sample to be measured adsorbed on the wiping paper.

10. The analysis system according to claim 9, wherein, The selection module is adapted to select the analysis system to perform the fast detection working mode of the sampled gas, During the fast detection working mode, the sampled gas is transported by the airflow of the clean gas from the clean gas outlet of the exhaust gas purification and balancing device to the central connection disk of the analysis module, and the sampled gas is detected by the ion mobility spectrometer and / or the mass spectrometer.

11. The analysis system according to claim 9, wherein, The selection module is adapted to select the analysis system to perform the fine detection working mode of the sampled gas, During the fine detection working mode, the sampled gas is transported by the airflow of the clean gas from the clean gas outlet of the waste gas purification and balancing device through the chromatographic column to the central connection plate of the analysis module, and the fine detection of the sampled gas is realized by the ion mobility spectrometer and / or the mass spectrometer.

12. The analysis system according to claim 9, wherein, The selection module further includes a wiping injection port, which is divided into an upper gas path and a lower gas path by a semi-permeable membrane. The upper gas path is suitable for accommodating a test paper adsorbed with the sample to be measured, and the adsorbed sample to be measured is converted into a detection gas by heating. One end of the lower gas path is operably communicated with the clean gas outlet of the waste gas purification and balancing device, and the other end of the lower gas path is communicated with the connection plate through a three-way joint.

13. The analysis system according to claim 12, wherein, The selection module is suitable for selecting the analysis system to execute the wiping injection working mode for the test paper. During the wiping injection working mode, the sampled gas is purged by the airflow of the clean gas from the clean gas outlet of the waste gas purification and balancing device to the connection plate for the detection gas located in the lower gas path of the semi-permeable membrane, and the detection gas generated by the wiping paper is detected by the mass spectrometer and / or the ion mobility spectrometer.

14. The analysis system according to claim 9, wherein, The selection module is suitable for selecting the analysis system to execute the standby working mode. During the standby working mode, the clean gas from the high-pressure buffer chamber enters the waste gas purification and balancing device from the waste gas inlet of the waste gas purification and balancing device, and a part of the first part of the clean gas discharged from the clean gas outlet of the waste gas purification and balancing device reaches the analysis module through a part of the plurality of two-position three-way valves and the chromatographic column.

15. The analysis system according to claim 14, wherein, The gas source further includes a first pressure transmitter suitable for detecting the air pressure in the waste gas purification and balancing device. During the standby working mode, the first cut-off valve is selectively opened and closed by the electronic control system according to the pressure in the waste gas purification and balancing device measured by the first pressure transmitter to keep the air pressure at the starting point of the gas path within the working condition range.

16. The analysis system according to claim 9, wherein, The gas source further includes a vacuum buffer chamber communicated with the analysis module. The selection module is suitable for selecting the analysis system to execute the sample loading and air pressure matching tooling mode. During the sample loading and air pressure matching working mode, the sampled gas is directly sucked into the pipeline between the first two-position three-way valve and the fourth two-position three-way valve of the selection module by the negative pressure of the vacuum buffer chamber, and the air pressure of the sampled gas is matched with the air pressure of the analysis module.

17. The analysis system according to claim 9, wherein The selection module is suitable for selecting the analysis system to execute the rapid cleaning working mode of the gas injection pipeline. During the rapid cleaning working mode of the gas injection pipeline, the injection pipeline of the sampled gas of the selection module is in an open state and physically isolated from the analysis module, and the high-pressure clean gas in the high-pressure buffer chamber forms a high-speed airflow to backflush the residual sampled gas in the sample tube through the injection pipeline.

18. The analysis system according to claim 9, wherein, The selection module is suitable for selecting the analysis system to execute the wiping injection port cleaning working mode. During the wiping injection port cleaning working mode, the high-pressure clean gas in the high-pressure buffer chamber purges the upper gas path of the wiping injection port.

19. The analysis system according to claim 16 further includes a calibration module, and the calibration module includes: A calibration tank suitable for accommodating or generating a standard gas. The eighth two-position three-way valve is connected between the high-pressure buffer chamber and the calibration tank; and the third stop valve is connected between the selection module and the calibration tank.

20. The analysis system according to claim 19, wherein, The selection module is adapted to select the calibration working mode for the analysis system. During the calibration working mode, the high-pressure clean gas in the high-pressure buffer chamber flows through the calibration tank and carries the standard gas in the calibration tank into the pipeline between the first two-position three-way valve and the fourth two-position three-way valve of the selection module. The standard gas is transported by the airflow of the clean gas from the clean gas outlet of the waste gas purification and balancing device to the central connection plate of the analysis module, and the detection and calibration of the standard gas are realized by the ion mobility spectrometer and / or the mass spectrometer.

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