CN220525747U - Internal standard substance adding device for sweeping and trapping - Google Patents
Internal standard substance adding device for sweeping and trapping Download PDFInfo
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- CN220525747U CN220525747U CN202322031861.3U CN202322031861U CN220525747U CN 220525747 U CN220525747 U CN 220525747U CN 202322031861 U CN202322031861 U CN 202322031861U CN 220525747 U CN220525747 U CN 220525747U
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- 239000000126 substance Substances 0.000 title claims abstract description 33
- 238000010408 sweeping Methods 0.000 title description 2
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 239000012535 impurity Substances 0.000 claims abstract description 11
- 230000001276 controlling effect Effects 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 11
- 239000012528 membrane Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000010926 purge Methods 0.000 abstract description 12
- 239000012855 volatile organic compound Substances 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007363 regulatory process Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 59
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000001926 trapping method Methods 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010813 internal standard method Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000012086 standard solution Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of volatile organic compound pretreatment, in particular to a purging and trapping internal standard substance adding device, which ensures the constant pressure effect of a gas path by arranging a gas path constant pressure component, an internal standard substance container component, a high-frequency electromagnetic valve group and a substrate flow channel component which are sequentially and hermetically connected; through the electronic pressure controller and the air resistance tube arranged in the air circuit, the air resistance tube discharges redundant pressure in the accurate pressure regulating process, so that the accurate constant pressure control of the electronic pressure controller is ensured; through the arrangement of the filter, impurities are filtered, so that the pollution to the internal standard substances and the blockage of the high-frequency electromagnetic valve are avoided, the use cost is reduced, and meanwhile, the purpose that one device can respectively add various internal standard substances is realized; under constant pressure gas, the preset volume of the internal standard can be accurately output by accurately controlling the opening and closing time of the high-frequency electromagnetic valve, so that waste is avoided; the outlet of the high-frequency electromagnetic valve is close to the center of the substrate flow channel, so that redundant internal standard substances are reduced.
Description
Technical Field
The utility model relates to the technical field of volatile organic compound pretreatment, in particular to an internal standard substance adding device for purging and trapping.
Background
The purging and trapping method is used in combination with a gas chromatograph or a gas chromatograph mass spectrometer and is used for measuring volatile or semi-volatile organic compounds, organometallic compounds and other pollutants in liquid or solid; typically, an autosampler for handling such samples has a storage area adapted to hold a plurality of samples to be analyzed and a functional area for sample preparation.
Because of the influence of factors such as matrix interference, purging efficiency, bubbling efficiency, selection of an adsorbent, desorption temperature, purging device design and the like, the purging trapping method often has the defect of large recovery rate fluctuation, the method is an effective method for accurately determining the object to be detected, the method for correcting the measurement result by using an internal standard method is an effective method, the existing six-way switching valve is combined with a quantitative ring, only a fixed and quantitative volume can be added, meanwhile, the requirement on the cleanliness of a medium is high, and substances such as particles can damage precise parts in the six-way valve; because the quantitative ring filling mode is adopted, more internal standard substances are required to be filled in order to ensure that the internal standard substances are filled in the quantitative ring, so that cost waste is caused, and the overall cost of the scheme is high; the microsyringe needle is directly added into the sample manually through the microsyringe needle, so that the risk of inaccurate addition and cross contamination is increased, and the microsyringe needle needs to be repeatedly cleaned after the microsyringe needle is used, so that the experimental time and the experimental cost are increased.
Disclosure of Invention
The utility model discloses a purging and trapping internal standard adding device, and aims to solve the technical problems in the prior art.
The utility model adopts the following technical scheme:
the internal standard substance adding device comprises a gas path constant pressure component, an internal standard substance container component, a high-frequency electromagnetic valve group and a substrate flow channel component which are connected in sequence; wherein,
the gas circuit constant pressure assembly comprises a gas source bottle, a switch valve, a pressure reducing valve, an electronic pressure controller for constant pressure, a gas resistance pipe for discharging redundant pressure and a filter for filtering gas impurities, which are sequentially connected with each other; the internal standard container assembly is at least provided with one internal standard container, the internal standard container comprises an internal standard conveying pipe connected with a high-frequency electromagnetic valve and a gas conveying pipe communicated with the filter, and the number of outlet channels arranged on the filter is the same as that of the internal standard containers; the high-frequency electromagnetic valves arranged on the high-frequency electromagnetic valve groups are communicated with the substrate flow passages arranged on the substrate flow passage assemblies.
In some embodiments, the device comprises a gas path constant pressure component, an internal standard container component and a high pressure component which are connected in sequence
Frequency electromagnetic valve group and base plate runner assembly; wherein,
the gas path constant pressure component comprises a gas source bottle, a pressure reducing valve and a constant pressure supply valve which are sequentially connected with each other and are provided with pressure
An electronic pressure controller for constant air pressure, an air resistance pipe for discharging redundant pressure and a filter for filtering gas impurities; the internal standard container assembly is at least provided with one internal standard container, the internal standard container comprises an internal standard conveying pipe connected with a high-frequency electromagnetic valve and a gas conveying pipe communicated with the filter, and the number of outlet channels arranged on the filter is the same as that of the internal standard containers; the high-frequency electromagnetic valves arranged on the high-frequency electromagnetic valve groups are communicated with the substrate flow passages arranged on the substrate flow passage assemblies.
In some embodiments, the upstream end of the pressure reducing valve is connected to a switching valve capable of controlling on-off of the input gas, and the downstream end of the pressure reducing valve is connected to the inlet end of the electronic pressure controller, so that the gas enters the electronic pressure control after being initially pressure-regulated.
In some embodiments, the electronic pressure controller is provided with an electronic gas proportional valve that can readjust the gas pressure by comparing the set point of the electrical signal with a built-in pressure sensor.
In some embodiments, the air resistance tube and the electronic pressure controller are respectively communicated with a three-way pipe fitting arranged in the middle, and the other end of the three-way pipe fitting is communicated with the filter, so that when the pressure of the electronic pressure controller exceeds a set value in accurate pressure regulation, the air resistance tube discharges redundant pressure to ensure accurate pressure control.
In some embodiments, the filter comprises a filter upper body, a filter lower body, a filter membrane positioned in the middle and a filter sealing ring with sealing function, wherein the filter upper body and the filter lower body are fixedly connected through threads; the filter lower body is provided with an inlet channel communicated with the three-way pipe fitting, the filter upper body is provided with an outlet channel communicated with the internal standard container, and the communication positions of the inlet channel, the outlet channel and the filtering membrane are respectively provided with a cavity.
In some embodiments, at least one outlet channel is provided, and each outlet channel is independent
Is communicated with one of the internal standard containers through the gas pipe.
In some embodiments, the internal standard container comprises a bottle for holding an internal standard liquid, sealing the bottle
The bottle cap of bottle, sealed gas-supply pipe, the internal standard thing conveyer pipe of intercommunication bottle inner chamber of being equipped with on the bottle cap, the other end intercommunication of gas-supply pipe the exit channel, the lower extreme of internal standard thing conveyer pipe stretches to the position that the internal standard liquid is close to the bottle bottom, the upper end with the entry sealing connection of high frequency solenoid valve.
In some embodiments, the bottle cap is hermetically provided with a gas pipe joint and an internal standard joint, the gas pipe joint and the internal standard joint are arranged on the bottle cap in a sealing way
The gas pipe joint and the internal standard joint are internally provided with through holes, and the gas pipe and the internal standard conveying pipe are respectively communicated with the inner cavity of the bottle body through the through holes.
In some embodiments, at least one of the high frequency solenoid valves is provided, the high frequency solenoid valve being in communication with
The internal standard container is correspondingly matched, and all outlets of the high-frequency electromagnetic valves are communicated with the substrate flow passage.
In some embodiments, the outlet of the high frequency solenoid valve is proximate the center of the substrate flow channel.
It should be noted that: the internal standard containers and the high-frequency electromagnetic valves are connected in parallel respectively, and the internal standard containers and the high-frequency electromagnetic valves are connected independently respectively, so that the addition of internal standards with different requirements can be met.
The beneficial effects are that:
the utility model discloses a purging and trapping internal standard adding device, which has the following advantages compared with the prior art:
the internal standard substance adding device for purging and trapping ensures the constant pressure effect of the gas path by arranging a gas path constant pressure component, an internal standard substance container component, a high-frequency electromagnetic valve group and a substrate flow channel component which are sequentially and hermetically connected; an electronic pressure controller arranged in the gas circuit is provided with an electronic gas proportional valve, and the electronic gas proportional valve can be used for adjusting the gas pressure again after primary pressure reduction by comparing a set value of an electric signal with a built-in pressure sensor; the air resistance pipe is communicated with the electronic pressure controller, so that when the pressure exceeds a set value in accurate pressure regulation of the electronic pressure controller, the air resistance pipe discharges redundant pressure, and accurate constant pressure control of the electronic pressure controller is ensured; through the arrangement of the filter and the plurality of outlet channels, impurities mixed in the gas are filtered, so that the pollution of internal standard substances is avoided, the impurities are prevented from blocking the high-frequency electromagnetic valve, the high-frequency electromagnetic valve is prevented from being damaged, the use cost is reduced, meanwhile, the addition of internal standard substances with different requirements is met, one device meets the respective addition of a plurality of internal standard substances, the use efficiency is improved, and the internal standard substances are ensured not to be polluted; the bottle cap is provided with a sealed bottle cap, a gas pipe and an internal standard substance conveying pipe which are communicated with the inner cavity of the bottle body are hermetically arranged on the bottle cap, the lower end of the internal standard substance conveying pipe extends to a position of the internal standard substance near the bottom of the bottle body, the upper end of the internal standard substance conveying pipe is in sealing connection with the inlet of the high-frequency electromagnetic valve, under constant pressure gas, the preset volume of the internal standard substance can be accurately output by accurately controlling the opening and closing time of the high-frequency electromagnetic valve, and the repeatability precision is high, so that the waste is effectively avoided; the outlet of the high-frequency electromagnetic valve is close to the center of the substrate flow channel, so that the phenomenon that the internal standard liquid is brought into redundant internal standard substances when passing through the substrate flow channel is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments are briefly described below to form a part of the present utility model, and the exemplary embodiments of the present utility model and the description thereof illustrate the present utility model and do not constitute undue limitations of the present utility model; in the drawings:
FIG. 1 is a schematic structural diagram of a technical scheme of an internal standard substance adding device for purging and trapping, which is provided by the embodiment of the utility model;
FIG. 2 is a schematic diagram of a filter solution;
FIG. 3 is a schematic structural diagram of an internal standard container technical scheme;
fig. 4 is a schematic structural diagram of a technical solution for connecting a high-frequency electromagnetic valve with a substrate flow channel assembly.
In the figure:
an air source bottle 1; a switch valve 2; a pressure reducing valve 3; an electronic pressure controller 4; a pressure sensor 41; an electronic gas proportional valve 42; an air resistance tube 5; a three-way pipe fitting 6; a filter 7; a filter upper body 71; a filter membrane 72; a filter seal ring 73; a filter lower body 74; an inlet passage 75; an outlet passage 76; a chamber 77; an internal standard container assembly 8; an internal standard container 81; a bottle 811; an internal standard bottle seal 812; a bottle cap 813; a gas delivery conduit fitting 814; an internal standard joint 815; an internal standard delivery tube 816; internal standard solution 817; a high frequency electromagnetic valve group 9; a high-frequency electromagnetic valve 91; a valve mounting substrate 10; a substrate flow path 11; a gas delivery pipe 12.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. In the description of the present utility model, it should be noted that, as used in the specification and the claims, the term "comprising" is an open-ended term, and thus should be interpreted to mean "including, but not limited to"; "number" means more than 2.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
As shown in fig. 1-4, the technical scheme of the utility model comprises:
the internal standard substance adding device for purging and trapping comprises a gas path constant pressure component, an internal standard substance container component 8, a high-frequency electromagnetic valve group 9 and a substrate flow channel component which are connected in sequence; wherein,
the gas circuit constant pressure assembly comprises a gas source bottle 1, a pressure reducing valve 3, an electronic pressure controller 4 for constant pressure, a gas resistance pipe 5 for discharging redundant pressure and a filter 7 for filtering gas impurities, which are sequentially connected with each other; the internal standard container assembly 8 is provided with at least one internal standard container 81, the internal standard container 81 comprises an internal standard conveying pipe 816 connected with a high-frequency electromagnetic valve 91 and a gas conveying pipe 12 communicated with the filter 7, and the number of outlet channels 76 arranged on the filter 7 is the same as that of the internal standard containers 81; the high-frequency electromagnetic valves 91 provided in the high-frequency electromagnetic valve group 9 are all communicated with the substrate flow channels 11 provided in the substrate flow channel assembly.
As shown in fig. 1-4, the preferred embodiment of the present utility model:
the internal standard substance adding device for purging and trapping comprises a gas path constant pressure component, an internal standard substance container component 8, a high-frequency electromagnetic valve group 9 and a substrate flow channel component which are connected in sequence.
The gas circuit constant pressure subassembly is including linking to each other in proper order be equipped with the air supply bottle 1 of pressure, be used for carrying out on-off control's switching valve 2 to the input of gas, carry out preliminary relief pressure valve 3 to the pressure of gas, be used for invariable atmospheric electronic pressure controller 4, tee bend pipe fitting 6 one end is linked together with the filter 7 of filtering gaseous impurity, and the other end is linked together with air resistor pipe 5 for when electronic pressure controller 4 surpassed the setting value in accurate pressure regulating pressure, air resistor pipe 5 is with unnecessary pressure drainage, has ensured the accurate invariable accuse pressure of electronic pressure controller 4.
The air-blocking pipe 5 selected in this example is a pipe fitting with a length of 5 cm, an outer diameter of 1.6 mm and an inner diameter of 0.13 mm.
The upstream end of the pressure reducing valve 3 is connected with the switch valve 2, and the downstream end is connected with the inlet end of the electronic pressure controller 4, so that the gas enters the electronic pressure control after the pressure is primarily regulated.
The electronic pressure controller 4 is provided with an electronic gas proportional valve 42, and the electronic gas proportional valve 42 can readjust the gas pressure by comparing the set value of the electric signal with the built-in pressure sensor 41.
Two ends of the three-way pipe fitting 6 are respectively communicated with the electronic pressure controller 4 and an inlet channel 75 of the filter 7 through a gas pipe 12, and the other end of the three-way pipe fitting 6 is communicated with the air resistance pipe 5.
In this embodiment, the filter 7 includes a filter upper body 71, a filter lower body 74, and a filter membrane 72 positioned in the middle for filtering the gas magazine, which are fixedly connected by threads, and the filter upper body and the filter lower body are sealed by a filter sealing ring 73; the filter lower body 74 is provided with an inlet channel 75 and is communicated with the three-way pipe fitting 6, the filter upper body 71 is provided with an outlet channel 76 communicated with the internal standard container assembly 8, and the communication parts of the inlet channel 75 and the outlet channel 76 and the filtering membrane 72 are respectively provided with a cavity 77, and the filtering membrane 72 is 10 micrometers in this example, so that impurities mixed in gas can be filtered, pollution to the internal standard liquid is avoided, and blockage of the high-frequency electromagnetic valve 9 is prevented.
The outlet channels 76 are at least one, in this embodiment, 3 outlet channels 76 are selected, each outlet channel 76 is independently connected with one internal standard container 81 through the gas pipe 12, that is, in this embodiment, 3 internal standard containers 81,3 are correspondingly arranged, each internal standard container 81 is respectively connected with 3 high-frequency electromagnetic valves 91, 3 internal standard containers 81 are connected in parallel to form an internal standard container assembly 8, and 3 high-frequency electromagnetic valves 91 are connected in parallel to form a high-frequency electromagnetic valve group 9.
Through the setting of filter 7 and 3 exit channel 76, filtered the impurity of mixing in the gas, avoided polluting the internal standard thing, prevented that impurity from blockking up high-accuracy high-frequency solenoid valve 91 to prevent damaging high-frequency solenoid valve 91, reduced use cost, satisfied the interpolation of the internal standard thing of different demands simultaneously.
It should be noted that the number of the outlet channels 76 may be set according to the kinds of the internal standard to be added.
The internal standard container 81 comprises an internal standard conveying pipe 816 connected with the inlet of the high-frequency electromagnetic valve 91 and a gas conveying pipe 12 communicated with the outlet channels 76 of the filter 7, and the number of the outlet channels 76 of the filter 7 is the same as that of the internal standard container 81; the high-frequency electromagnetic valves 91 provided in the high-frequency electromagnetic valve group 9 are all communicated with the substrate flow channels 11 provided in the substrate flow channel assembly.
The internal standard container 81 comprises a bottle body 811 for containing internal standard liquid 817, and a bottle cap 813 installed on the bottle body 811 through threaded connection, the bottle cap 813 and the bottle body 811 are sealed through an internal standard bottle sealing ring 812, a gas pipe 12 communicated with the inner cavity of the bottle body 811 and an internal standard conveying pipe 816 are hermetically installed on the bottle cap 813, the other end of the gas pipe 12 is communicated with the outlet channel 76, the lower end of the internal standard conveying pipe 816 stretches into the position, close to the bottom of the bottle body 811, of the internal standard liquid 817, and the upper end of the internal standard conveying pipe 816 is in sealing connection with the inlet of the high-frequency electromagnetic valve 91.
The bottle cap 813 is fixedly provided with a gas pipe joint 814 and an internal standard joint 815, through holes are respectively formed in the gas pipe joint 814 and the internal standard joint 815, and the gas pipe 12 and the internal standard conveying pipe 816 are respectively communicated with the inner cavity of the bottle 811 through the through holes and are in sealing fit with the wall of the through holes.
The high-frequency electromagnetic valve 91 is provided with at least one, in this example, 3 pieces of the internal standard containers 81 are connected in a matching manner, so that 3 pieces of the high-frequency electromagnetic valves 91 are selected, the outlets of all the high-frequency electromagnetic valves 91 are communicated with the substrate flow channels 11 arranged in the valve mounting substrate 10, and the joints are sealed.
In this embodiment, the outlet of the high-frequency electromagnetic valve 91 is close to the center of the substrate flow channel 11, and in this way, the extra internal standard substance can be reduced when the internal standard liquid 817 passes through the substrate flow channel 11.
Namely 3 internal standard containers and 3 high-frequency electromagnetic valves are respectively connected in parallel, and a single internal standard container and a single high-frequency electromagnetic valve are respectively and independently connected so as to meet the addition of internal standards with different requirements.
The specific working process comprises the following steps:
when the automatic control device works, the switch valve 2 is opened, the air source bottle 1 filled with nitrogen is communicated with the air passage, the pressure reducing valve 3 is regulated to reduce the air pressure to a preset pressure, the electronic pressure controller 4 is used for further accurately regulating the pressure, in the pressure regulating process, when exceeding a set value, the air resistance pipe 5 is used for discharging redundant pressure, the accurate pressure control is met, nitrogen is filtered by the filtering membrane 72 of 10 micrometers arranged on the filter 7 and then enters the internal standard container 81 through the air pipe 12, after the nitrogen in the internal standard container 81 passes, the nitrogen is stably controlled to be about 50 kilopascals, at the moment, the opening and closing of the high-frequency electromagnetic valve 91 is controlled by microsecond on-off time, and because constant pressure exists in the inner cavity of the internal standard container 81, when the high-frequency electromagnetic valve 9 is opened, the internal standard liquid 817 is conveyed to the high-frequency electromagnetic valve 9 through the internal standard conveying pipe 816 and then is input into the substrate flow passage 11, the volume of the internal standard liquid 817 can be controlled to be at the minimum 1 microliter through accurately controlling the opening and closing time of the high-frequency electromagnetic valve 9, and the repeatability accuracy reaches 97%.
It should be noted that, in this example, 3 outlet channels 76 that filter 7 set up are connected to 3 internal standard containers 81 respectively by 3 gas-supply pipes 12, internal standard containers 81 are connected with 3 high-frequency solenoid valves 9 respectively, 3 high-frequency solenoid valves 9 are all connected with base plate runner 11, can add different internal standard liquids 817 respectively according to different demands, can design 1 or more valve installation base plates 10 according to the use requirement, has realized that a piece of equipment satisfies the respective interpolation of multiple internal standard liquids 817, has improved availability factor, has ensured that the internal standard is not polluted.
The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.
Claims (10)
1. The utility model provides an internal standard thing interpolation device of entrapment sweeps which characterized in that: the device comprises an air path constant pressure assembly, an internal standard container assembly, a high-frequency electromagnetic valve group and a substrate flow passage assembly which are connected in sequence; wherein,
the gas circuit constant pressure assembly comprises a gas source bottle, a switch valve, a pressure reducing valve, an electronic pressure controller for constant pressure, a gas resistance pipe for discharging redundant pressure and a filter for filtering gas impurities, which are sequentially connected with each other; the internal standard container assembly is at least provided with one internal standard container, the internal standard container comprises an internal standard conveying pipe connected with a high-frequency electromagnetic valve and a gas conveying pipe communicated with the filter, and the number of outlet channels arranged on the filter is the same as that of the internal standard containers; the high-frequency electromagnetic valves arranged on the high-frequency electromagnetic valve groups are communicated with the substrate flow passages arranged on the substrate flow passage assemblies.
2. The purge-trapped internal standard addition device of claim 1, wherein: the subtraction is performed
The upstream end of the pressure valve is connected with the switch valve capable of controlling the on-off of the input gas, and the downstream end of the pressure reducing valve is connected with the inlet end of the electronic pressure controller, so that the gas enters the electronic pressure controller after the pressure is initially regulated.
3. The purge-trapped internal standard addition device of claim 2, wherein: the electronic pressure controller is provided with an electronic gas proportional valve, and the electronic gas proportional valve can readjust the gas pressure by comparing the set value of the electric signal with a built-in pressure sensor.
4. The purge-trapped internal standard addition device of claim 1, wherein: the air resistance pipe is communicated with the electronic pressure controller through the three-way pipe fitting arranged in the middle of the air resistance pipe, and the other end of the three-way pipe fitting is communicated with the filter, so that when the pressure of the electronic pressure controller exceeds a set value in accurate pressure regulation, the air resistance pipe discharges redundant pressure to ensure accurate pressure control.
5. The purge-trapped internal standard addition device of claim 4, wherein: the filter comprises a filter upper body, a filter lower body, a filter membrane positioned in the middle and a filter sealing ring with a sealing function, wherein the filter upper body and the filter lower body are fixedly connected through threads; the filter lower body is provided with an inlet channel communicated with the three-way pipe fitting, the filter upper body is provided with an outlet channel communicated with the internal standard container, and the communication positions of the inlet channel, the outlet channel and the filtering membrane are respectively provided with a cavity.
6. The purge-trapped internal standard addition device of claim 5, wherein: the outlet channels are at least provided with one, and each outlet channel is independently communicated with one internal standard container through the gas transmission pipe.
7. The purge-trapped internal standard addition device of claim 5, wherein: the inner part is provided with
The standard container comprises a bottle body for containing an internal standard liquid and a bottle cap for sealing the bottle body, wherein the bottle cap is sealed
The bottle body is provided with an inner standard substance conveying pipe and an air conveying pipe which are communicated with the inner cavity of the bottle body, and the other end of the air conveying pipe is communicated with the bottle body
The lower end of the internal standard substance conveying pipe extends to the position of the internal standard liquid near the bottom of the bottle body and is provided with an outlet channel
The end is in sealing connection with the inlet of the high-frequency electromagnetic valve.
8. The purge-trapped internal standard addition device of claim 7, wherein: said bottle
The gas pipe joint and the internal standard object joint are fixedly sealed on the cover, through holes are formed in the gas pipe joint and the internal standard object joint, and the gas pipe and the internal standard object conveying pipe are respectively communicated with the inner cavity of the bottle body through the through holes.
9. The purge-trapped internal standard addition device of claim 1, wherein: the high-frequency electromagnetic valve is provided with at least one, the high-frequency electromagnetic valve is correspondingly matched with the internal standard container, and the outlets of all the high-frequency electromagnetic valves are communicated with the substrate flow passage.
10. The purge-trapped internal standard addition device of claim 9, wherein: the outlet of the high-frequency electromagnetic valve is close to the center of the substrate flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322031861.3U CN220525747U (en) | 2023-07-31 | 2023-07-31 | Internal standard substance adding device for sweeping and trapping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322031861.3U CN220525747U (en) | 2023-07-31 | 2023-07-31 | Internal standard substance adding device for sweeping and trapping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220525747U true CN220525747U (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322031861.3U Active CN220525747U (en) | 2023-07-31 | 2023-07-31 | Internal standard substance adding device for sweeping and trapping |
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| CN (1) | CN220525747U (en) |
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2023
- 2023-07-31 CN CN202322031861.3U patent/CN220525747U/en active Active
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