CN210893823U - Gas closed sampler - Google Patents
Gas closed sampler Download PDFInfo
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- CN210893823U CN210893823U CN201921693127.0U CN201921693127U CN210893823U CN 210893823 U CN210893823 U CN 210893823U CN 201921693127 U CN201921693127 U CN 201921693127U CN 210893823 U CN210893823 U CN 210893823U
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Abstract
The utility model provides a gas closed sampler, which comprises a sampling steel cylinder, wherein the sampling end of the sampling steel cylinder is provided with an inlet valve and is provided with a sample supply pipeline, and the sampling end is provided with an outlet valve and is provided with a sample outlet pipeline; the sample inlet pipeline is provided with a first three-way valve which is connected with an interface a and an interface b according to the flow direction of a sample, and an interface c is connected to the sample outlet pipeline; a second three-way valve is arranged on the sample outlet pipeline and in front of the connection point of the interface c, the interface e and the interface d are connected according to the sample outlet flow direction, and the interface f is connected with a nitrogen pipeline; a nitrogen purging valve is arranged on the nitrogen pipeline; a pressure gauge is arranged on a sample outlet pipeline between the second three-way valve and the sample steel cylinder; the sampling steel bottle both ends are provided with the bypass pipeline, be provided with the first check valve of flow direction from the appearance end to the appearance end of advancing on the bypass pipeline. The closed sampler is a safe, practical, green and environment-friendly linkage valve circulating closed sampler, and is simple to operate, safe and environment-friendly.
Description
Technical Field
The utility model relates to a chemical industry gas sampling field, concretely relates to gaseous airtight sample thief.
Background
The chemical industry often encounters gases containing hydrogen sulfide as an inorganic compound with the chemical formula H2And S. The egg is a colorless and inflammable acid gas under normal conditions, has bad odor when the concentration is low, and has the smell like a smelly egg; at high concentrations there is no smell on the contrary (since high concentrations of hydrogen sulfide can paralyze the olfactory nerve). Hydrogen sulfide is an acute virulent, and inhalation of a small amount of high-concentration hydrogen sulfide can be fatal in a short time. Low concentrations of hydrogen sulfide have an effect on the eye, respiratory system and central nervous system.
A simple sampling container which is commonly used when a hydrogen sulfide gas-containing medium is sampled on site is a bladder and an air bag, a root valve and a sampling valve are added to a main pipeline during design, and the replaced hydrogen sulfide gas is directly discharged to the atmosphere during sampling. The medium sampler containing hydrogen sulfide gas has various types, and with the increase of the supervision of environmental protection departments, petrochemical and coal chemical projects begin to popularize the closed sampling device of the stainless steel box body, thereby not only meeting the requirement of environmental protection, but also being uniform and beautiful.
However, a plurality of needle valves and three-way ball valves are often adopted on each pipeline of the closed sampler at the present stage, the quantity is large, the operation is complex, the misoperation is easy, and the limitation of the structure causes the trouble of overhauling and maintenance. In case of leakage or misoperation in field sampling, great harm is caused to operators, and the sampling mode does not meet the environmental protection requirement. The sealed sampler has more dead zones which cannot be replaced or purged in the internal pipeline, so that the residual internal pipeline of the sample pollutes secondary media, and the analysis and detection results are influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem of above at least one, the utility model provides a gaseous airtight sample thief can guarantee that gaseous medium does not directly discharge to the atmosphere, accords with the chemical examination needs and also accords with safety standard's sampling mode. The possibility that sampling personnel inhales sample volatile substances is avoided, the harm of harmful media to sampling staff is effectively prevented, the life safety of the sampling staff is protected, a channel for discharging the sample to the atmosphere is cut off, the collected sample is strong in authenticity, high in accuracy and free of residual gas discharge.
In order to realize the above purpose, the utility model adopts the following technical scheme:
the utility model provides a gas closed sampler, which comprises a sampling steel cylinder, wherein the sampling end of the sampling steel cylinder is provided with an inlet valve and is provided with a sample supply pipeline, and the sampling end is provided with an outlet valve and is provided with a sample outlet pipeline;
the sample inlet pipeline is provided with a first three-way valve which is connected with an interface a and an interface b according to the flow direction of a sample, and an interface c is connected to the sample outlet pipeline;
a second three-way valve is arranged on the sample outlet pipeline and in front of the connection point of the interface c, the interface e and the interface d are connected according to the sample outlet flow direction, and the interface f is connected with a nitrogen pipeline; a nitrogen purging valve is arranged on the nitrogen pipeline;
a pressure gauge is arranged on a sample outlet pipeline between the second three-way valve and the sample steel cylinder;
the sampling steel bottle both ends are provided with the bypass pipeline, be provided with the first check valve of flow direction from the appearance end to the appearance end of advancing on the bypass pipeline.
When the gas closed sampler of the utility model is used for sampling, the a interface, the b interface, the e interface and the d interface are communicated, and the inlet valve and the outlet valve of the sampling steel cylinder are opened; a gas sample enters a sampling steel cylinder from a process pipeline through a sample pipeline, a sample outlet pipeline is connected to a torch pipeline, and sample cyclic replacement is carried out; after sampling is finished, the outlet valve is closed, then the inlet valve is closed, then the f interface, the e interface, the b interface and the c interface are communicated, the nitrogen purge valve is opened, and purging and emptying are carried out on the pipeline; and closing the nitrogen purging valve after the nitrogen purging is finished, closing the first three-way valve and the second three-way valve after the pressure gauge returns to zero, detaching the steel cylinder, and finishing sampling. In the process, because nitrogen purging is added, no medium residual dead angle exists in the whole flow pipeline. And the gas medium is prevented from being directly discharged to the atmosphere, and the sampling mode which meets the requirement of the assay and also meets the safety standard is avoided.
Preferably, the first three-way valve and the second three-way valve are linkage valves, and the ports a, b, e and d can be controlled to be opened simultaneously while the ports c and f are closed, or the ports f, e, b and c are controlled to be opened simultaneously while the ports a and d are closed. The valve is operated simply by adopting the linkage valve, and misoperation is prevented, so that the operation method is simpler.
For example, in the preferred embodiment of the present invention, when the linkage valve is pulled to the left, the ports a, b, e and d are opened simultaneously; when the right side is pulled, the interfaces f, e, b and c are opened simultaneously; when the valve is pulled to the middle, the linkage valve is closed.
Preferably, a second one-way valve is arranged on a nitrogen pipeline from the nitrogen purging valve to the f interface of the second three-way valve; and a third one-way valve is arranged on the sample outlet pipeline behind the interface connection point. The utility model discloses the check valve has been added in the preferred scheme, has prevented the emergence of medium reflux, scurry gas.
For example, in the preferred embodiment of the present invention, the nitrogen gas from the nitrogen gas line can only flow in the direction indicated by the arrow of the check valve and cannot reversely flow back. If the one-way valve or any one of the three valves is removed, medium backflow and air blowby can occur.
Preferably, the sampling steel cylinder is respectively assembled with the sample inlet pipeline and the sample outlet pipeline through quick connectors. Can be connected to during airtight sampling device with sampling steel article fast when needs sampling, dismantle the steel bottle fast after accomplishing the sampling.
Preferably, the gas-tight sampler is connected to the process line by a flange.
Preferably, the sample line from the first three-way valve to the inlet end of the sampling cylinder is a metal hose.
When medium operating temperature is greater than 60 ℃, the utility model discloses an in the preferred scheme, on the pipeline of advancing a sample, be provided with the cooler before the first three-way valve, make the medium go out after the cooler temperature drops to about 40 ℃, carry out the sampling operation again. Moreover, a pollution discharge method is left on the cooler to prevent the cooler from being frozen.
When medium operating pressure is greater than 3.0MPa, the utility model discloses a preferred scheme is from the consideration of safety angle, on the pipeline of advancing a sample, is provided with the relief pressure valve before the first three-way valve, makes its pressure drop to about 1.0MPa, then carries out the sample operation again.
When the operating pressure of medium is little negative pressure, can't adopt the sample, the utility model discloses an in the preferred scheme, on advancing the appearance pipeline, be provided with the booster pump before the first three-way valve, make the medium get the steel bottle smoothly.
The utility model discloses a gaseous airtight sample thief is the circulating airtight sample thief of the linked valve of safe practical green. The sampling mode ensures that the gas medium is not directly discharged to the atmosphere, and meets the requirement of the assay and the safety standard. The possibility that sampling personnel inhales sample volatile substances is avoided, the harm of harmful media to sampling staff is effectively prevented, the life safety of the sampling staff is protected, a channel for discharging the sample to the atmosphere is cut off, the collected sample is strong in authenticity, high in accuracy and free of residual gas discharge. Meets the national requirements on environmental protection, fire prevention, explosion prevention and other specifications, thereby reducing the pollution to the atmospheric environment and ensuring more accurate and reliable assay analysis.
The utility model discloses a gaseous airtight sample thief has following beneficial effect:
1) the operation process is simple and convenient;
2) the valve adopts a linkage valve, so that the operation is simple and the misoperation is prevented;
3) a nitrogen purging component is added, so that no medium residual dead angle exists in the whole process pipeline;
4) and a one-way valve is added, so that the medium backflow and the gas channeling are prevented.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of a gas-tight sampler according to a preferred embodiment of the present invention.
Fig. 2 is a schematic view of a gas-tight sampler according to another preferred embodiment of the present invention.
Description of reference numerals:
1. sampling a steel cylinder;
2. an inlet valve;
3. an outlet valve;
4. a quick coupling;
5. a first check valve;
6. a linkage valve;
61. a first three-way valve;
62. a second three-way valve;
7. a nitrogen purge valve;
8. a second one-way valve;
9. a third check valve;
10. and a pressure gauge.
Detailed Description
In order to explain the present invention more clearly, the present invention will be further described with reference to the preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In addition, some orientation words mentioned in the embodiments of the present invention, such as "left", "right", "upper", "lower", etc., are used in the meaning related to the placement of the gas-tight sampler, and should not be construed as limiting the scope of the present invention.
In a preferred embodiment, as shown in fig. 1, the gas-tight sampler comprises a sampling steel cylinder 1, wherein a sample inlet end (upper end in fig. 1) of the sampling steel cylinder 1 is provided with an inlet valve 2, a sample inlet pipeline is assembled, a sample outlet end (lower end in fig. 1) is provided with an outlet valve 3, a sample outlet pipeline is assembled, and the inlet valve and the outlet valve at two ends of the sampling steel cylinder are needle valves; through quick-operation joint 4 and come appearance pipeline and go out the appearance pipeline and assemble respectively, can install fast and dismantle. A bypass pipeline of the steel cylinder is arranged between the quick connector and needle valves at two ends of the steel cylinder, and a first one-way valve 5 is arranged on the bypass pipeline and controls the flow direction to be consistent with the direction from the outlet end to the inlet end as shown in figure 1.
The three ports of the first three-way valve 61 are a, b and c, respectively; the three ports of the second three-way valve 62 are d, e and f, respectively; a. the interface connection of b is on coming the appearance pipeline, d, e interface connection are on going out the appearance pipeline, and the interface connection of c is on going out the appearance pipeline behind the d interface, and f interface connection nitrogen gas pipeline. And a nitrogen purging valve 7 and a second one-way valve 8 are sequentially arranged on the nitrogen pipeline according to the nitrogen flow direction. A third one-way valve 9 is also arranged on the sample outlet pipeline behind the interface c.
Wherein, the pipeline between the interface b and the quick joint 4 at the inlet end of the steel cylinder is a metal hose. A pressure gauge 10 is arranged on the sample outlet pipeline.
The flow when the gas-tight sampler of the preferred embodiment is used for sampling is as follows:
1. two ends of the sampling steel cylinder 1 are connected into the closed sampler through quick connectors 4.
2. The first three-way valve 61 is operated to communicate the ports a and b, and the second three-way valve 62 is operated to communicate the ports e and d;
3. and opening an inlet valve 2 and an outlet valve 3 at two ends of the steel cylinder to perform sample cyclic replacement.
4. The inlet valve 2 at the upper end of the steel cylinder is closed first, and then the outlet valve 3 at the lower end of the steel cylinder is closed.
5. And operating the second three-way valve 62 to communicate the f interface and the e interface, operating the first three-way valve 61 to communicate the b interface and the c interface, opening the nitrogen purge valve 7, and purging the pipeline by adopting nitrogen.
6. The nitrogen purge valve 7 is closed, and the first three-way valve 61 and the second three-way valve 62 are both closed after the pressure gauge 10 is reset to zero.
7. And (5) detaching the sampling steel cylinder 1, and finishing sampling.
In another preferred embodiment, the first three-way valve 61 and the second three-way valve 62 are the linkage valve 6, as shown in fig. 2, when the linkage valve 6 is pulled to the left, the ports a, b, e and d are simultaneously opened while the ports c and f are closed; when the right side is pulled, the interfaces f, e, b and c are simultaneously opened, and the interfaces a and d are closed; when the valve is pulled to the middle, the linkage valve is closed. Therefore, the operation steps can be reduced through the linkage valve 6, and the probability of misoperation is reduced.
The flow when sampling is performed is as follows:
1. two ends of the sampling steel cylinder 1 are connected into the closed sampler through quick connectors 4.
2. The linkage valve 6 is pulled to the left position.
3. And opening an inlet valve 2 and an outlet valve 3 at two ends of the steel cylinder to perform sample cyclic replacement.
4. The inlet valve 2 at the upper end of the steel cylinder is closed first, and then the outlet valve 3 at the lower end of the steel cylinder is closed.
5. And (4) turning the linkage valve 6 to the right side, opening the nitrogen purging valve 7, and purging and emptying the pipeline by adopting nitrogen.
6. And closing the nitrogen purge valve 7, and turning the linkage valve 6 to the middle closing position after the pressure gauge 10 returns to zero.
7. And (5) detaching the sampling steel cylinder 1, and finishing sampling.
Further, when the operating temperature of the medium is higher than 60 ℃, a cooler is arranged in front of the linkage valve 6 on the sampling pipeline, so that the temperature of the medium discharged from the cooler is reduced to about 40 ℃, and then sampling operation is carried out. And a blow-down valve is left on the cooler to prevent the cooler from freezing.
When the operating pressure of the medium is more than 3.0MPa, a pressure reducing valve is arranged on the sampling pipeline in front of the linkage valve 6 to reduce the pressure to about 1.0MPa, and then sampling operation is carried out.
When the operating pressure of the medium is micro negative pressure, a booster pump is arranged on the sampling pipeline in front of the linkage valve 6, so that the medium can be smoothly taken into the steel cylinder.
Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it is obvious for those skilled in the art to make other variations or changes based on the above descriptions, and all the embodiments cannot be exhausted here, and all the obvious variations or changes that belong to the technical solutions of the present invention are still in the protection scope of the present invention.
Claims (10)
1. A gas closed sampler is characterized by comprising a sampling steel cylinder, wherein the sampling end of the sampling steel cylinder is provided with an inlet valve and is provided with a sample supply pipeline, and the sampling end is provided with an outlet valve and is provided with a sample outlet pipeline;
the sample inlet pipeline is provided with a first three-way valve which is connected with an interface a and an interface b according to the flow direction of a sample, and an interface c is connected to the sample outlet pipeline;
a second three-way valve is arranged on the sample outlet pipeline and in front of the connection point of the interface c, the interface e and the interface d are connected according to the sample outlet flow direction, and the interface f is connected with a nitrogen pipeline; a nitrogen purging valve is arranged on the nitrogen pipeline;
a pressure gauge is arranged on a sample outlet pipeline between the second three-way valve and the sample steel cylinder;
the sampling steel bottle both ends are provided with the bypass pipeline, be provided with the first check valve that the flow direction is unanimous with appearance end to appearance end direction of appearance of going out on the bypass pipeline.
2. The gas-tight sampler of claim 1, wherein the first and second three-way valves are linked valves that control the simultaneous opening of the a, b, e, and d ports while the c and f ports are closed, or the simultaneous opening of the f, e, b, and c ports while the a and d ports are closed.
3. The gas containment sampler of claim 2, wherein the a, b, e and d ports open simultaneously when the linkage valve is pulled to the left; when the right side is pulled, the interfaces f, e, b and c are opened simultaneously; when the valve is pulled to the middle, the linkage valve is closed.
4. The gas-tight sampler according to claim 1, wherein a second one-way valve is provided on the nitrogen line from the nitrogen purge valve to the f-port of the second three-way valve; and a third one-way valve is arranged on the sample outlet pipeline behind the interface connection point.
5. The gas tight sampler according to claim 1, wherein the sampling cylinder is fitted with the sample inlet line and the sample outlet line, respectively, by quick connectors.
6. The gas tight sampler of claim 1, wherein the gas tight sampler is connected to a process line by a flange.
7. The gas-tight sampler of claim 1, wherein the sample line from the first three-way valve to the inlet end of the sampling cylinder is a metal hose.
8. The gas-tight sampler according to claim 1, wherein a cooler is provided on the sample line before the first three-way valve; and a sewage draining outlet is arranged on the cooler.
9. The gas-tight sampler according to claim 1, wherein a pressure relief valve is provided on the sample line before the first three-way valve.
10. The gas-tight sampler of claim 1, wherein a booster pump is provided in the sample line before the first three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693127.0U CN210893823U (en) | 2019-10-11 | 2019-10-11 | Gas closed sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921693127.0U CN210893823U (en) | 2019-10-11 | 2019-10-11 | Gas closed sampler |
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| CN210893823U true CN210893823U (en) | 2020-06-30 |
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| CN201921693127.0U Active CN210893823U (en) | 2019-10-11 | 2019-10-11 | Gas closed sampler |
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| CN (1) | CN210893823U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881086A (en) * | 2021-02-05 | 2021-06-01 | 大庆华林化工特种设备有限公司 | Manual mechanical type airtight sampling device |
| CN114459811A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampler and chemical system |
| CN114459832A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampling device and chemical system |
| CN114459833A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampling device and chemical system |
-
2019
- 2019-10-11 CN CN201921693127.0U patent/CN210893823U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112881086A (en) * | 2021-02-05 | 2021-06-01 | 大庆华林化工特种设备有限公司 | Manual mechanical type airtight sampling device |
| CN112881086B (en) * | 2021-02-05 | 2024-02-09 | 闫林 | Manual mechanical type airtight sampling device |
| CN114459811A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampler and chemical system |
| CN114459832A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampling device and chemical system |
| CN114459833A (en) * | 2022-01-11 | 2022-05-10 | 中国神华煤制油化工有限公司 | Sampling device and chemical system |
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