CN114459832A - Sampling device and chemical system - Google Patents
Sampling device and chemical system Download PDFInfo
- Publication number
- CN114459832A CN114459832A CN202210025098.0A CN202210025098A CN114459832A CN 114459832 A CN114459832 A CN 114459832A CN 202210025098 A CN202210025098 A CN 202210025098A CN 114459832 A CN114459832 A CN 114459832A
- Authority
- CN
- China
- Prior art keywords
- way valve
- sampling device
- valve
- sample
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 51
- 239000000126 substance Substances 0.000 title claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 24
- 239000000463 material Substances 0.000 claims abstract description 15
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims 2
- 238000000034 method Methods 0.000 description 14
- 239000007788 liquid Substances 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 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
- G01N1/22—Devices for withdrawing samples in the gaseous state
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/02—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
-
- 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
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2226—Sampling from a closed space, e.g. food package, head space
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to the technical field of chemical sample sampling, and discloses a sampling device and a chemical system, wherein the sampling device comprises a first multi-way valve (11) and a second multi-way valve (18) which are respectively connected to a sample storage device through a material passing pipeline (9) and a return pipeline (16), and a sampler and a pressure reducing pipeline (14) which are connected between the first multi-way valve (11) and the second multi-way valve (18), wherein the first multi-way valve (11) is connected with a nitrogen pipeline (12) for filling nitrogen, and the first multi-way valve (11) and the second multi-way valve (18) can be controlled to ensure that the return pipeline (16) is selectively communicated with one of the nitrogen pipeline (12) and the material passing pipeline (9) through the sampler. The sampling device provided by the invention is convenient for workers to operate and can effectively control the collection of samples. That is, samples can be collected and replaced quickly, while reasonable processing can also be performed on the remaining samples.
Description
Technical Field
The invention relates to the technical field of chemical sample sampling, in particular to a sampling device and a chemical system.
Background
Liquid samples in the coal chemical industry and the petrochemical industry are more and common, the collection of the liquid samples is also very important in analysis, the sampling requirement is not only representative, but also factors such as safety, environmental protection and the like are considered, and the problem that how to safely and environmentally quickly take the representative samples is long-standing is solved.
At present, in the process of sampling volatile and flammable samples, the samples are directly sampled, so that the samples can splash, and therefore safety and environmental protection hidden dangers exist in the emergency situations of the samples such as the volatile and flammable samples. The existing sampling device cannot guarantee that a sample is collected under the closed condition, and the collected sample cannot be reasonably processed, so that the condition can not only cause harm to workers, but also possibly cause serious pollution to the environment.
Disclosure of Invention
The invention aims to solve the problems that the prior art can not ensure the collection of samples under a closed condition and can not reasonably treat the residual samples after collection, and provides a sampling device and a chemical system. That is, samples can be collected and replaced quickly, while reasonable processing can also be performed on the remaining samples.
In order to achieve the above object, an aspect of the present invention provides a sampling apparatus, including a first and a second multi-way valves respectively connected to a sample storage device through a feed line and a return line, and a sampler and a pressure reducing line connected between the first and the second multi-way valves, wherein a nitrogen line for charging nitrogen is connected to the first multi-way valve, and the first and the second multi-way valves can be controlled such that the return line selectively communicates one of the nitrogen line and the feed line through the sampler.
Optionally, a processing line for processing a sample is connected to the second multi-way valve and can be controlled such that the nitrogen gas line selectively communicates with one of the return line and the processing line through the sampler.
Optionally, a material passing valve is installed on the material passing pipeline.
Optionally, a return valve is mounted on the return line.
Optionally, a pressure relief valve is mounted on the pressure relief line.
Optionally, a nitrogen valve is installed on the nitrogen line.
Optionally, a process valve is mounted on the process line.
Optionally, the samplers are connected to the first and second multi-way valves by quick connectors, respectively.
Optionally, a flow valve is installed between the sampler and the quick connector.
The invention provides a chemical engineering system, which comprises the sampling device.
Through the technical scheme, the invention has the following beneficial effects:
the sampler can be replaced rapidly between the first multi-way valve and the second multi-way valve, and sampling efficiency is improved. Sampling device and install the sample thief in sampling device link together and form inclosed circulating line through logical material pipeline and backflow pipeline, guarantee that the sample can be quick flow to the sample thief in, unnecessary sample can also flow back to in the sample storage facilities. Particularly, as the sample flows in the closed circulating pipeline, the sample can be prevented from leaking in the collection process, and the sample is prevented from splashing to the staff, so that the staff is better protected. In addition, many samples are easy to oxidize, have strong water absorption and the like, and the closed circulating pipeline can avoid the samples from contacting with the external environment.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention.
FIG. 1 is a schematic diagram of one embodiment of a sampling device in accordance with the present invention;
FIG. 2 is a schematic diagram of one embodiment of a sampler of the present invention;
fig. 3 is a sectional view of the sampler of the present invention.
Description of the reference numerals
1-a first quick joint, 2-a second quick joint, 3-a first needle valve, 4-a second needle valve, 5-a strip observation window, 6-a pressure-resistant inner shell, 7-a sampling port, 8-an outer shell, 9-a material pipeline, 10-a material valve, 11-a first multi-way valve, 12-a nitrogen pipeline, 13-a nitrogen valve, 14-a pressure-reducing pipeline, 15-a pressure-reducing valve, 16-a backflow pipeline, 17-a backflow valve, 18-a second multi-way valve, 19-a treatment pipeline and 20-a treatment valve.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As shown in fig. 1, the sampling apparatus of the present invention includes a first multi-way valve 11 and a second multi-way valve 18 connected to a sample storage device through a feed line 9 and a return line 16, respectively, and a sampler and a depressurization line 14 connected between the first multi-way valve 11 and the second multi-way valve 18, wherein a nitrogen line 12 for charging nitrogen is connected to the first multi-way valve 11, and the first multi-way valve 11 and the second multi-way valve 18 can be controlled such that the return line 16 selectively communicates with one of the nitrogen line 12 and the feed line 9 through the sampler.
The sampler can be quickly replaced between the first multi-way valve 11 and the second multi-way valve 18, and sampling efficiency is improved. The sampling device and the sampler installed on the sampling device are connected together through the material passing pipeline 9 and the return pipeline 16 to form a closed circulating pipeline, so that the sample can quickly flow into the sampler, and redundant sample can also flow back into the sample storage equipment. Particularly, as the sample flows in the closed circulating pipeline, the sample can be prevented from leaking in the collection process, and the sample is prevented from splashing to the staff, so that the staff is better protected. In addition, many samples have the characteristics of easy oxidation, strong water absorption and the like, and the closed circulating pipeline can avoid the samples from contacting with the external environment. The first multi-way valve 11 and the second multi-way valve 18 of the present invention can control the opening and closing of at least one passage, for example, the first multi-way valve 11 is a four-way valve, and can control the opening and closing of at least one passage, and can also control the combination of four passages, and the specific combination is described below.
In addition, as shown in fig. 1, a decompression line 14 is connected in parallel with the sampler between the first multi-way valve 11 and the second multi-way valve 18. If the sampler has overlarge pressure in the sampling process, the sample can circulate in the decompression pipeline 14, so that the effect of pressure relief is realized, and the damage to the sampler caused by overlarge pressure is avoided. In the process of replacing the sampler, the sample in the pipeline stops flowing suddenly, and a large impact force is generated, so that the pipeline is damaged. However, the decompression line 14 has a certain buffering capacity, and can prevent the sample from suddenly stopping to generate a large impact force, thereby preventing the line from being damaged.
As shown in fig. 1, a processing line 19 for processing a sample is connected to the second multi-way valve 18 in the present invention, and can be controlled so that the nitrogen gas line 12 selectively communicates one of the return line 16 and the processing line 19 through the sampler. A material passing valve 10 is arranged on the material passing pipeline 9; a return valve 17 is arranged on the return pipeline 16; a pressure reducing valve 15 is arranged on the pressure reducing pipeline 14; a nitrogen valve 13 is arranged on the nitrogen pipeline 12; a process valve 20 is mounted on the process line 19. The above valves are combined with the first multi-way valve 11 and the second multi-way valve 18, so that the sampling device can rapidly collect samples.
The sampling device has the following specific modes:
preparation of the sampling device (cleaning of the sampler): the sampler is first installed between the first and second multi-way valves 11, 18, and the first and second multi-way valves 11, 18 are adjusted in preparation for cleaning the sampler. Wherein, the first multi-way valve 11 is communicated with the sampler and the nitrogen pipeline 12, and the rest passages are all in a closed state. A second multi-way valve 18 communicates the sampler with a process line 19. Then, the nitrogen gas valve 13 and the treatment valve 20 are opened, and nitrogen gas is injected to clean the sampler.
Sample collection: after the sampler is cleaned, all valves are adjusted to be in a closed state.
A first multi-way valve 11 is adjusted to communicate with the vent line 9, the pressure reducing line 14 and the sampler, a second multi-way valve 18 is adjusted to communicate with the return line 16, the pressure reducing line 14 and the sampler, and the pressure reducing valve 15 is opened. Then, the material opening valve 10 and the return valve 17 are opened in sequence, and a sample is collected. When the sample in the sampler meets the requirement, closing the passages of the first multi-way valve 11 and the second multi-way valve 18 which are communicated with the sampler, then closing the material passing valve 10, the pressure reducing valve 15 and the return valve 17 in sequence, finally closing all the valves and checking whether all the valves are closed, and taking out the sampler.
Work of treatment of the remaining samples: when the sample of the sampler remains after the assay analysis, some samples can be recycled, but some samples can only be processed (combustion and the like). Wherein, the sample is recoverable, then, install the sample thief between first multi-way valve 11 and second multi-way valve 18, adjust first multi-way valve 11 and communicate sample thief and nitrogen gas pipeline 12, adjust second multi-way valve 18 and communicate sample thief and backflow pipeline 20 to open backward flow valve 17 and nitrogen gas valve 13 in proper order, pour into nitrogen gas, nitrogen gas flushes remaining sample back to sample storage equipment. Then, the nitrogen gas valve 13 is closed first, and then all valves are closed, and the sampler is disassembled. And if the sample is not recyclable, installing a sampler between the first multi-way valve 11 and the second multi-way valve 18, adjusting the first multi-way valve 11 to be communicated with the sampler and the nitrogen pipeline 12, adjusting the second multi-way valve 18 to be communicated with the sampler and the treatment pipeline 19, sequentially opening the treatment valve 20 and the nitrogen valve 13, flushing nitrogen, flushing the rest of the sample into treatment equipment by the nitrogen (burning in a torch system), then closing the nitrogen valve 13, then closing all valves, and disassembling the sampler.
As shown in fig. 1 to 3, the sampler of the present invention includes a housing having a containing chamber for containing a sample, and a sampling port 7 and a flow port communicating with the containing chamber, the flow port being located at both ends of the housing and being respectively provided with quick-nipples for connecting with a sampling device.
The sampler is simply and swiftly connected on sampling device through quick-operation joint, guarantees that the sample is in inclosed environment all the time at the in-process of sampling, avoids contacting with the air or emits harmful gas. Therefore, the sampler not only ensures safety and environmental protection, but also is more scientific and standard in sample collection and treatment. Wherein, first quick-operation joint 1 and second quick-operation joint 2 are installed respectively to the both ends of sample thief, and first quick-operation joint 1 is used for the sample, then second quick-operation joint 2 is arranged in discharging the remaining sample back to the sampling device, and the prerequisite is that the sample still has the surplus after experimental analysis to remaining sample accords with the requirement of discharging back to the sampling device. It should be noted that the connection between the first quick coupling 1 and the second quick coupling 2 is not specifically limited, and the connection is selected according to actual conditions. If the residual sample does not meet the requirement of being discharged back to the sampling device, the residual sample cannot be poured into the waste liquid barrel, so that waste and environmental pollution are avoided. The second quick coupling 2 is thus connected to the sample processing device, i.e. to the process system or discharged into the flare system.
Furthermore, the sampling device has a sampling opening 7, from which the laboratory worker can directly sample with a syringe. Wherein, the sampling port 7 is positioned on the side surface of the sampler, which facilitates the subsequent analysis and closed sample extraction.
The shell comprises a pressure-resistant inner shell 6 and an outer shell 8 which are arranged from inside to outside, the accommodating cavity is formed in the pressure-resistant inner shell 6, and the shape of the pressure-resistant inner shell 6 is matched with that of the outer shell 8. The pressure-resistant inner shell 6 is made of glass, and the pressure-resistant glass liner is made of glass, so that the damage to the sampler caused by the overlarge pressure of the pressure-resistant inner shell 6 in the sample collection process is avoided. In addition, the material of the housing 8 is steel, more preferably stainless steel, which provides a certain pressure resistance to prevent the sampler from being deformed by external force or damaged by internal pressure.
And a long observation window 5 for observing the sample contained in the containing cavity is arranged along the length direction of the shell. In the sampling process, an experimenter can observe the specific conditions of the sample in the sampler through the long observation window 5, and the sampler is prevented from being damaged due to overlarge internal pressure.
Furthermore, a scale line for observing the liquid level of the sample contained in the containing cavity is provided along the length direction of the long observation window 5. The laboratory technician can look over the ration of sample in real time, promptly, can observe the liquid level of sample, is convenient for control sampling volume, avoids the sample to gather inadequately or gathers too much, causes unnecessary trouble.
The shell is provided with a plurality of strip observation windows 5 which are symmetrically arranged by taking the central axis of the shell as a central line. The plurality of long observation windows 5 are used for facilitating the observation of the sample and avoiding the specific situation that the sample in the sampler cannot be observed due to the inconvenience of the environment.
A flow valve for controlling the flow of the sample is arranged between the flow port and the quick connector. The flow valve in the present invention is preferably a needle valve, wherein a first needle valve 3 and a second needle valve 4 are respectively installed at both ends of the sampler to respectively control the inlet amount and the outlet amount of the sample, so as to quantitatively collect the sample.
The sampling port 7 is sleeved with a replaceable sealing sleeve, and the sealing sleeve ensures that a sample is always in a sealed state in the sampler. Wherein, the seal cover should be regularly changed, avoids the seal cover of long-time use to cause the sample thief leakproofness to descend.
The invention provides a chemical engineering system, which comprises the sampling device.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.
Claims (10)
1. The utility model provides a sampling device, its characterized in that includes first multi-way valve (11) and second multi-way valve (18), the connection that are connected to sample storage equipment through logical material pipeline (9) and backflow pipeline (16) respectively first multi-way valve (11) with sample thief and decompression pipeline (14) between second multi-way valve (18), be connected with nitrogen gas pipeline (12) that are used for filling into nitrogen gas on first multi-way valve (11), and this first multi-way valve (11) with second multi-way valve (18) can be controlled for make backflow pipeline (16) selectivity passes through the sample thief intercommunication nitrogen gas pipeline (12) with one in logical material pipeline (9).
2. The sampling device according to claim 1, characterized in that a processing line (19) for processing the sample is connected to the second multi-way valve (18) and can be controlled so that the nitrogen line (12) communicates selectively through the sampler with one of the return line (16) and the processing line (19).
3. The sampling device according to claim 2, characterized in that a processing valve (20) is mounted on the processing line (19).
4. The sampling device according to claim 1, characterized in that a venting valve (10) is mounted on the venting line (9).
5. The sampling device according to claim 1, characterized in that a return valve (17) is mounted on the return line (16).
6. The sampling device according to claim 1, characterized in that a pressure relief valve (15) is mounted on the pressure relief line (14).
7. The sampling device according to claim 1, characterized in that a nitrogen valve (13) is fitted on the nitrogen line (12).
8. The sampling device according to claim 1, characterized in that said samplers are connected to said first and second multi-way valves (11, 18) respectively, by quick connectors.
9. The sampling device of claim 8, wherein a flow valve is installed between the sampler and the quick coupling.
10. A chemical system, characterized in that it comprises a sampling device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025098.0A CN114459832A (en) | 2022-01-11 | 2022-01-11 | Sampling device and chemical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025098.0A CN114459832A (en) | 2022-01-11 | 2022-01-11 | Sampling device and chemical system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114459832A true CN114459832A (en) | 2022-05-10 |
Family
ID=81409282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210025098.0A Pending CN114459832A (en) | 2022-01-11 | 2022-01-11 | Sampling device and chemical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114459832A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19711349A1 (en) * | 1997-03-18 | 1998-09-24 | Basf Ag | Sampling apparatus for taking laboratory samples of liquefied gases |
| CN203502259U (en) * | 2013-07-23 | 2014-03-26 | 南通市三联石化设备制造有限公司 | Sealed sampling device |
| CN205049384U (en) * | 2015-10-13 | 2016-02-24 | 中国神华能源股份有限公司 | Aldehydes material sampling device |
| CN210465008U (en) * | 2019-07-01 | 2020-05-05 | 青岛瑞通测控技术有限公司 | Toxic and harmful medium sampler |
| CN210893823U (en) * | 2019-10-11 | 2020-06-30 | 北京石油化工工程有限公司 | Gas closed sampler |
-
2022
- 2022-01-11 CN CN202210025098.0A patent/CN114459832A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19711349A1 (en) * | 1997-03-18 | 1998-09-24 | Basf Ag | Sampling apparatus for taking laboratory samples of liquefied gases |
| CN203502259U (en) * | 2013-07-23 | 2014-03-26 | 南通市三联石化设备制造有限公司 | Sealed sampling device |
| CN205049384U (en) * | 2015-10-13 | 2016-02-24 | 中国神华能源股份有限公司 | Aldehydes material sampling device |
| CN210465008U (en) * | 2019-07-01 | 2020-05-05 | 青岛瑞通测控技术有限公司 | Toxic and harmful medium sampler |
| CN210893823U (en) * | 2019-10-11 | 2020-06-30 | 北京石油化工工程有限公司 | Gas closed sampler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210893823U (en) | Gas closed sampler | |
| JP2649588B2 (en) | Sampling equipment for chemical processing | |
| CN114459832A (en) | Sampling device and chemical system | |
| CA2847593C (en) | Method and apparatus for unplugging hydrocarbon drains or vents | |
| JP3793528B2 (en) | Fluid sampling system | |
| AT519420A1 (en) | METHOD FOR MONITORING AND PROTECTING AN ELECTROCHEMICAL DEVICE | |
| CN210834340U (en) | Transformer gas production device | |
| CN114459811A (en) | Sampler and chemical system | |
| CN213039472U (en) | Centrifugal pump for conveying hazardous chemical materials | |
| CN210269743U (en) | Gas chromatography apparatus | |
| US2968183A (en) | Sampling system | |
| CN209484010U (en) | A kind of passive fire emergency fuses valve automatically | |
| CN215004425U (en) | Sampling system for preventing harmful medium leakage | |
| CN108593352B (en) | Environment-friendly liquid chemical sampler | |
| CN205138833U (en) | Automatic sampling device of transformer oil appearance | |
| CN213037479U (en) | Closed acid-base neutralization tank device | |
| CN218470248U (en) | Separator emulsion sampling device | |
| CN109234025A (en) | Sour water tank deodorization cleaning formulation and its cleaning method | |
| CN204789274U (en) | Container for hydrogen induced crack resistance test | |
| CN214369361U (en) | Leakage protection valve and gas field pipeline pressure measuring device | |
| CN216377469U (en) | Integrated system of material conveying interface | |
| JP2000342926A (en) | Filter apparatus | |
| CN220603367U (en) | Online PH meter protective sheath | |
| CN210571547U (en) | Chemical liquid airtight sampling device | |
| CN204043962U (en) | Fluid sampling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |