CN114910296A - Isolated sampling device and sampling method and application thereof - Google Patents
Isolated sampling device and sampling method and application thereof Download PDFInfo
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- CN114910296A CN114910296A CN202110168919.1A CN202110168919A CN114910296A CN 114910296 A CN114910296 A CN 114910296A CN 202110168919 A CN202110168919 A CN 202110168919A CN 114910296 A CN114910296 A CN 114910296A
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- 238000005070 sampling Methods 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000002955 isolation Methods 0.000 claims abstract description 70
- 239000007789 gas Substances 0.000 claims description 80
- 239000003570 air Substances 0.000 claims description 29
- 230000001502 supplementing effect Effects 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 17
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 10
- 231100000331 toxic Toxicity 0.000 claims description 9
- 230000002588 toxic effect Effects 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000001307 helium Substances 0.000 claims description 6
- 229910052734 helium Inorganic materials 0.000 claims description 6
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 239000005341 toughened glass Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 231100000614 poison Toxicity 0.000 abstract description 3
- 230000007096 poisonous effect Effects 0.000 abstract description 3
- 239000013589 supplement Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000003915 air pollution Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 acryl Chemical group 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an isolation sampling device and a sampling method and application thereof, wherein the isolation sampling device comprises a sampling assembly, an isolation operation assembly and a gas internal circulation assembly; the sampling assembly comprises a sampling pipeline, a sampling valve and a sampler; the isolation operation component comprises an isolation cover and an operation glove; the gas circulation assembly comprises a vacuumizing assembly for providing vacuum degree for the isolation hood and a gas supply assembly for supplying gas for the isolation hood to balance the pressure difference between the inside and the outside of the isolation hood. Keep apart sampling device and keep apart sample operation space and exterior space, avoid operating personnel to inhale poisonous and harmful gas, ensure that operating personnel is healthy, avoid poisonous and harmful gas pollution place air simultaneously.
Description
Technical Field
The invention relates to the technical field of chemical equipment, in particular to an isolation sampling device and a sampling method and application thereof.
Background
A small amount of samples need to be taken out for analysis of materials in the chemical vacuum system, and then various physicochemical properties of the materials are determined. The sample taking operation of the vacuum system needs to disconnect the sampler from the vacuum system, while the material samples are mostly toxic and harmful chemicals, and the conventional sampler dismounting operation is usually exposed to the atmosphere or a ventilation cabinet is installed above the sampling platform. The air purifier is directly disassembled in the atmosphere, thus threatening the health of personnel and air pollution of places; although the effect on the health of operators and the air pollution of places can be reduced by installing the ventilating cabinet, the effect is limited.
Disclosure of Invention
The invention aims to eliminate the hidden health danger of chemical sampling operators and avoid air pollution in sampling places, and provides an isolation sampling device which comprises a sampling assembly, an isolation operation assembly and a gas internal circulation assembly, wherein the isolation operation assembly can isolate a sampling operation space from an external space, so that the operators are prevented from inhaling toxic and harmful gases, and the body health of the operators is guaranteed.
In another aspect of the present invention, a sampling method of the isolated sampling device is provided.
In another aspect of the present invention, the sampling method is applied to sampling of toxic and harmful samples.
The technical scheme adopted for realizing the purpose of the invention is as follows:
an isolated sampling device comprises a sampling assembly, an isolated operation assembly and a gas internal circulation assembly;
the sampling assembly comprises a sampling pipeline, a sampling valve and a sampler, wherein one end of the sampling pipeline is communicated with the vacuum system, the sampler is detachably arranged at the other end of the sampling pipeline so as to take out a sample in the vacuum system, and the sampling valve is arranged on the sampling pipeline;
the isolation operation assembly comprises an isolation cover and an operation glove which is sealed and detachably arranged on the isolation cover; the sampling pipeline penetrates through the wall of the isolation cover and is installed with the isolation cover in a sealing mode, and the sampling valve and the sampler are located in the inner cavity of the isolation cover;
the gas circulation assembly comprises a vacuumizing assembly for providing vacuum degree for the isolation hood and a gas supply assembly for supplying gas for the isolation hood to balance the pressure difference between the inside and the outside of the isolation hood.
In the above technical solution, the vacuum pumping assembly includes a pumping-out pipeline, a vacuum pump valve and a vacuum pump; the evacuation pipeline penetrates through the wall of the isolation cover and is installed in a sealing mode, one end of the evacuation pipeline is communicated with the inner cavity of the isolation cover, and the other end of the evacuation pipeline is connected with the vacuum pump; the vacuum pump valve is mounted on the evacuation conduit.
In the above technical scheme, the evacuation pipeline is provided with a pressure gauge.
In the above technical scheme, the gas supply assembly comprises a gas supply material bottle, a gas supply valve and a gas supply pipeline; the air supply pipeline penetrates through the wall of the isolation cover and is installed with the isolation cover in a sealing mode; one end of the air supply pipeline is communicated with the isolation cover, the other end of the air supply pipeline is communicated with the air supply material bottle, and the air supply valve is installed on the air supply pipeline.
In the technical scheme, 2-10 operation holes are formed in the isolation cover, and one operation glove is detachably mounted on each operation hole in a sealed mode through an operation hole ring.
In the above technical scheme, the isolation cover is made of tempered glass, acryl or polycarbonate.
In the above technical scheme, the gas in the gas supplementing material bottle is one of nitrogen, helium, argon and air.
In the above technical solution, when the gas in the gas supplementing bottle is helium, the evacuation pipe is located above the gas supplementing line; when the gas in the gas supplementing material bottle (12) is argon, the evacuation pipeline (9) is positioned below the gas supplementing pipeline (14).
In another aspect of the present invention, the sampling method of the isolated sampling device comprises the following steps:
step 1: opening a sampling valve through an operating glove, and starting sampling by the sampler;
step 2: after sampling is finished, closing a sampling valve, and disassembling the sampler from a sampling pipeline;
and 3, step 3: opening a vacuum pump and a vacuum pump valve, pumping out gas in the isolation hood, then closing the vacuum pump valve, opening a gas supplementing valve, supplementing gas in the isolation hood through a gas supplementing bottle, and closing the gas supplementing valve to finish 1-time circulating purification;
and 4, step 4: and 3, repeating the step 5-10 times, opening the operation hole ring after the gas is completely purified in a circulating way, and taking out the sampler through the operation hole.
In the technical scheme, the opening degrees of the vacuum pump valve and the air supplement valve are controlled, so that the reading of the pressure gauge is between 0.05 and 0.1 MPa.
In another aspect of the present invention, the sampling method is used for sampling toxic and harmful samples.
Compared with the prior art, the invention has the beneficial effects that:
1. the isolation sampling device provided by the invention comprises a sampling assembly, an isolation operation assembly and a gas internal circulation assembly, and has the advantages of simple structure, lower use cost and good economy.
2. The isolation sampling device provided by the invention isolates the sampling operation space from the external space, avoids the inhalation of toxic and harmful gases by operators, ensures the health of the operators, and simultaneously avoids the pollution of the toxic and harmful gases to the air of places.
3. The isolation sampling device provided by the invention can be provided with a proper number of operation holes according to the actual sampling requirement, so that multiple samples can be sampled simultaneously, and the working efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an isolated sampling device.
In the figure: 1-vacuum system, 2-sampling pipeline, 3-sampling valve, 4-isolation cover, 5-sampler, 6-operation hole, 6 a-operation hole ring, 7-operation glove, 8-pressure gauge, 9-evacuation pipeline, 10-vacuum pump valve, 11-vacuum pump, 12-air supplement material bottle, 13-air supplement valve and 14-air supplement pipeline.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
An isolated sampling device, as shown in fig. 1, includes a sampling assembly, an isolation operating assembly, and a gas internal circulation assembly;
the sampling assembly comprises a sampling pipeline (2), a sampling valve (3) and a sampler (5), one end of the sampling pipeline (2) is communicated with a vacuum system (1) (the vacuum system is working equipment in a negative pressure state, and toxic and harmful working gas is filled in the vacuum system), the sampler (5) is detachably mounted at the other end of the sampling pipeline (2) so as to take out a sample in the vacuum system (1), and the sampling valve is mounted on the sampling pipeline (2); the number of the groups of the sampling assemblies is set according to the sampling number requirement;
the isolation operation assembly comprises an isolation cover (4) and an operation glove (7) which is hermetically and detachably mounted on the isolation cover (4), an operation hole (6) is formed in the isolation cover (4), an operation hole ring (6a) is hermetically and detachably mounted on the operation hole (6), and the operation glove (7) is hermetically mounted on the operation hole ring (6 a); the sampling pipeline (2) penetrates through the wall of the isolation cover (4) and is installed in a sealing mode with the wall of the isolation cover, and the sampling valve (3) and the sampler (5) are located in an inner cavity of the isolation cover (4);
the gas circulation assembly comprises a vacuumizing assembly for providing vacuum degree for the isolation hood (4) and a gas supply assembly for supplying gas for the isolation hood (4) to balance the internal and external pressure difference of the isolation hood (4).
Specifically, the vacuum-pumping assembly comprises an evacuation pipe (9), a vacuum pump valve (10) and a vacuum pump (11); the evacuation pipeline (9) penetrates through the wall of the isolation cover (4) and is installed in a sealing mode with the wall, one end of the evacuation pipeline (9) is communicated with the inner cavity of the isolation cover (4), and the other end of the evacuation pipeline is connected with the vacuum pump (11); the vacuum pump valve (10) is mounted on the evacuation conduit (9). And a pressure gauge (8) is arranged on the evacuation pipeline (9). The vacuum pump (11) is connected with a tail gas treatment device to prevent toxic and harmful gases from diffusing into the atmosphere.
Specifically, the gas supply assembly comprises a gas supply material bottle (12), a gas supply valve (13) and a gas supply line (14); the gas supply line (14) is passed through the wall of the insulating hood (4) and is mounted in a sealing manner therewith. One end of the air supply pipeline (14) is communicated with the isolation hood (4), the other end of the air supply pipeline is communicated with the air supply material bottle (12), and the air supply valve (13) is installed on the air supply pipeline (14).
Example 2
This embodiment is based on embodiment 1 and describes a preferred structure thereof.
The number of the operation holes (6) is 2-10, and each operation hole (6) is provided with the operation glove (7) in a sealing mode. The number of the operation holes 6 and the operation gloves 7 can be determined according to actual requirements for facilitating actual sampling operation.
The material of cage (4) is toughened glass, and the change material is resistant poisonous and harmful gas corrosion such as ya keli or polycarbonate, transparent visual convenient operation, not fragile material, does not influence the in-service use effect.
The gas in the air supplement material bottle (12) is nitrogen. The nitrogen is changed into helium, argon or air, so that the actual use effect is not influenced. The relative position of the evacuation pipe (9) in the gas supply line (14) is determined by the density of the gas in the gas supply bottle (12). When the gas density is greater than the air density, the evacuation pipe (9) is located below the gas supply line (14); when the gas density is less than the air density, the evacuation pipe (9) is located above the supply line (14). For example, when the gas inside the make-up gas bottle (12) is helium, the evacuation pipe (9) is located above the make-up gas line (14); when the gas in the gas supplementing material bottle (12) is argon, the evacuation pipeline (9) is positioned below the gas supplementing pipeline (14).
Example 3
This example describes the sampling method based on example 1.
The sampling method of the isolation sampling device comprises the following steps:
step 1: the sampling valve (3) is opened by operating the glove (7), and the sampler (5) starts to sample;
and 2, step: after sampling is finished, closing the sampling valve (3), and disassembling the sampler (5) from the sampling pipeline (2);
and 3, step 3: alternately switching on and off the vacuumizing assembly and the gas supply assembly to circularly purify the gas in the inner cavity of the isolation cover (4) for many times;
specifically, a vacuum pump (11) and a vacuum pump valve (10) are started, gas in the isolation hood (4) is pumped out, when the reading of a pressure gauge (8) is close to 0.05MPa, the vacuum pump valve (10) is closed, a gas supplementing valve (13) is opened, gas is supplemented into the isolation hood (4) through a gas supplementing bottle (12), when the reading of the pressure gauge (8) is close to 0.1MPa, the gas supplementing valve (13) is closed, and once circulation purification is completed.
And 4, step 4: and 3, repeating the step 5-10 times, opening the operation hole ring (6a) after the gas is completely purified in a circulating way, and taking out the sampler (5) through the operation hole (6).
Controlling a vacuum pump valve (10) and an aeration valve (13) to enable the reading of the pressure gauge (8) to be between 0.05 and 0.1 MPa.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (11)
1. An isolated sampling device is characterized by comprising a sampling assembly, an isolated operation assembly and a gas internal circulation assembly;
the sampling assembly comprises a sampling pipeline (2), a sampling valve (3) and a sampler (5), one end of the sampling pipeline (2) is communicated with the vacuum system (1), the sampler (5) is detachably mounted at the other end of the sampling pipeline (2) so as to take out a sample in the vacuum system (1), and the sampling valve is mounted on the sampling pipeline (2);
the isolation operation assembly comprises an isolation cover (4) and an operation glove (7) which is hermetically and detachably arranged on the isolation cover (4); the sampling pipeline (2) penetrates through the wall of the isolation cover (4) and is installed in a sealing mode with the wall of the isolation cover, and the sampling valve (3) and the sampler (5) are located in an inner cavity of the isolation cover (4);
the gas circulation assembly comprises a vacuumizing assembly for providing vacuum degree for the isolation hood (4) and a gas supply assembly for supplying gas for the isolation hood (4) to balance the internal and external pressure difference of the isolation hood (4).
2. The isolated sampling device of claim 1, wherein the evacuation assembly comprises an evacuation conduit (9), a vacuum pump valve (10), and a vacuum pump (11); the evacuation pipeline (9) penetrates through the wall of the isolation cover (4) and is installed in a sealing mode with the wall, one end of the evacuation pipeline (9) is communicated with the inner cavity of the isolation cover (4), and the other end of the evacuation pipeline is connected with the vacuum pump (11); the vacuum pump valve (10) is mounted on the evacuation line (9).
3. The isolated sampling device according to claim 2, wherein a pressure gauge (8) is mounted on the evacuation pipe (9).
4. The isolated sampling device of claim 2, wherein the gas replenishment assembly comprises a replenishment bottle (12), a replenishment valve (13), and a replenishment line (14); the air supply line (14) penetrates through the wall of the isolation hood (4) and is mounted in a sealing manner with the wall; one end of the air supply pipeline (14) is communicated with the isolation cover (4), the other end of the air supply pipeline is communicated with the air supply material bottle (12), and the air supply valve (13) is installed on the air supply pipeline (14).
5. The isolated sampling device of claim 1, wherein the isolation cover (4) is provided with 2-10 operation holes (6), and each operation hole (6) is hermetically and detachably provided with one operation glove (7) through an operation hole ring (6 a).
6. The isolated sampling device of claim 1, wherein the isolation cover (4) is made of tempered glass, acrylic or polycarbonate.
7. The isolated sampling device according to claim 4, wherein the gas in the make-up gas bottle (12) is one of nitrogen, helium, argon and air.
8. The isolated sampling device according to claim 7, wherein, when the gas in the supplementary gas bottle (12) is helium, the evacuation pipe (9) is located above the supplementary gas line (14);
when the gas in the gas supplementing material bottle (12) is argon, the evacuation pipeline (9) is positioned below the gas supplementing pipeline (14).
9. A sampling method for isolating a sampling device as claimed in any one of claims 1 to 8 including the steps of:
step 1: the sampling valve (3) is opened by operating the glove (7), and the sampler (5) starts to sample;
step 2: after sampling, closing the sampling valve (3), and detaching the sampler (5) from the sampling pipeline (2);
and step 3: opening a vacuum pump (11) and a vacuum pump valve (10), pumping out gas in the isolation hood (4), then closing the vacuum pump valve (10), opening a gas supplementing valve (13), supplementing gas into the isolation hood (4) through a gas supplementing bottle (12), and closing the gas supplementing valve (13) to finish 1-time circular purification;
and 4, step 4: and 3, repeating the step 5-10 times, opening the operation hole ring (6a) after the gas is completely purified in a circulating way, and taking out the sampler (5) through the operation hole (6).
10. A sampling method according to claim 9, characterized in that the opening of the vacuum pump valve (10) and the gulp valve (13) are controlled such that the pressure gauge (8) reads between 0.05-0.1 MPa.
11. Use of the sampling method according to claim 10 for sampling toxic or harmful samples.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168919.1A CN114910296A (en) | 2021-02-07 | 2021-02-07 | Isolated sampling device and sampling method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110168919.1A CN114910296A (en) | 2021-02-07 | 2021-02-07 | Isolated sampling device and sampling method and application thereof |
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| CN114910296A true CN114910296A (en) | 2022-08-16 |
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| CN202110168919.1A Pending CN114910296A (en) | 2021-02-07 | 2021-02-07 | Isolated sampling device and sampling method and application thereof |
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