CN220322823U - Vacuum sampling valve with replacement function - Google Patents
Vacuum sampling valve with replacement function Download PDFInfo
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- CN220322823U CN220322823U CN202321914698.9U CN202321914698U CN220322823U CN 220322823 U CN220322823 U CN 220322823U CN 202321914698 U CN202321914698 U CN 202321914698U CN 220322823 U CN220322823 U CN 220322823U
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- valve
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- 238000005070 sampling Methods 0.000 title claims abstract description 167
- 238000003780 insertion Methods 0.000 claims abstract description 20
- 230000037431 insertion Effects 0.000 claims abstract description 20
- 238000000605 extraction Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 47
- 238000004821 distillation Methods 0.000 abstract description 27
- 238000004458 analytical method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 230000000717 retained effect Effects 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000008021 deposition Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 5
- YZCKVEUIGOORGS-NJFSPNSNSA-N Tritium Chemical compound [3H] YZCKVEUIGOORGS-NJFSPNSNSA-N 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 229910052722 tritium Inorganic materials 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a vacuum sampling valve with a replacement function, which comprises: a main pipe, a replacement component and a sampling component; the two ends of the main pipeline are respectively provided with an exhaust pipe connected with the vacuum pump and an insertion pipe connected with the sampling port; the main pipeline is sequentially provided with a replacement valve group and a sampling valve group, the replacement valve group is connected with the replacement assembly, and the sampling valve group is connected with the sampling assembly. The beneficial effects are that: the inside of the replacement component and the sampling component can be in a vacuum state through the vacuum pump and the exhaust pipe, the material liquid retained in the sampling pipeline is collected through the replacement component, so that the sampling accuracy is guaranteed, and after the sampling is finished, the collected liquid in the replacement component is returned to the sampling pipeline again, so that the environmental pollution caused by the loss of the material liquid in the distillation tower is avoided; under negative pressure, carry out the negative pressure sample through the sampling component, the sample liquid of being convenient for gets into inside the sampling component fast, helps improving sampling efficiency, guarantees sample analysis's accuracy.
Description
Technical Field
The utility model relates to the technical field of sampling devices, in particular to a vacuum sampling valve with a replacement function.
Background
A catalytic exchange distillation technology is adopted in the research project of the tritium-containing wastewater deep purification and concentration technology to establish a low-concentration tritium-containing wastewater removal concentration rack, and a plurality of sampling ports are designed in the tower kettle, a circulating pipe between the tower kettle and a reboiler, a middle feed liquid conveying pipeline and the like of the catalytic exchange distillation tower. The sampling ports are used for sampling feed liquid, and the components of the feed liquid are analyzed to finish data acquisition work in tritium-containing wastewater concentration and purification efficiency calculation and distillation tower running state judgment.
At present, when sampling is carried out, the feed liquid automatically flows through gravity after each sampling port is opened to complete sampling, but in practice, the inside of the catalytic exchange distillation tower is in a negative pressure environment (the vacuum degree is about 10-12 kpa) under the running state, and the sampling speed is very slow only depending on the feed liquid automatically flowing when sampling, and the sampling requirement is difficult to be met due to overlong time consumption. Part of analysis data is found to be wrong when the analysis of the sample components is carried out in the later stage, and the analysis data of the first sample and the calculated concentration change trend curve of each component of the feed liquid are usually larger in deviation value when the sampling interval is longer.
Meanwhile, because branch sampling pipelines at the positions of a tower kettle, a reboiler and the like are long, when the flow rate of feed liquid in the circulating pipe and the feed liquid conveying pipe is reduced due to the change of the running state of the distillation tower, deposition phenomenon is easy to occur, and the concentration of each component of the feed liquid is greatly deviated from the feed liquid in each stage of catalytic exchange distillation tower. Therefore, when sampling is carried out, the part of feed liquid can only be discharged out of the distillation tower, and the operation is carried out for a period of time, and then the sampling is carried out again, so that the feed liquid in the distillation tower is frequently lost, and the environmental pollution of a factory building site can be caused due to higher radionuclide concentration of the part of discharged feed liquid.
Therefore, the vacuum sampling valve with the replacement function is designed, so that the replacement of part of deposition feed liquid can be realized, and the accuracy and the representativeness of a sample are improved; meanwhile, the rapid sampling of the feed liquid in the negative pressure environment can be realized.
Disclosure of Invention
The utility model aims to provide a vacuum sampling valve with a replacement function. The inside of the device can be maintained in a negative pressure environment during sampling, so that the sampling speed is increased, and rapid sampling is realized; the function of replacing partial deposition feed liquid in the sampling process is realized, so that the concentration of each component of the feed liquid to be analyzed at the bottom and the top of the catalytic exchange distillation tower is consistent with that of the taken feed liquid sample, and the effectiveness of test data acquisition is ensured.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a vacuum sampling valve with a replacement function, which comprises:
a main pipe, a replacement component and a sampling component;
the two ends of the main pipeline are respectively provided with an exhaust pipe connected with the vacuum pump and an insertion pipe connected with the sampling port; the main pipeline is sequentially provided with a replacement valve group and a sampling valve group, the replacement valve group is connected with the replacement assembly, and the sampling valve group is connected with the sampling assembly.
Preferably, the sampling assembly comprises a sampling tube and a sampling injector, the sampling valve group comprises a fourth three-way valve and a fifth three-way valve, two connecting ports of the fourth three-way valve are respectively connected with the main pipeline, the other connecting port is connected with the sampling injector, two connecting ports of the fifth three-way valve are respectively connected with the main pipeline, and the other connecting port is connected with the sampling tube.
Preferably, a sampling needle is arranged at the end part of the sampling tube far away from the fifth three-way valve.
Preferably, the replacement assembly comprises a first replacement pipe, a second replacement pipe and a replacement intermediate container, the replacement valve group comprises a second three-way valve and a third three-way valve, two connection ports of the second three-way valve are respectively connected with the main pipe, the other connection port of the second three-way valve is connected with the first replacement pipe, two connection ports of the third three-way valve are respectively connected with the main pipe, the other connection port of the third three-way valve is connected with the second replacement pipe, and the first replacement pipe and the second replacement pipe are both communicated with the replacement intermediate container.
Preferably, the surface of the displacement intermediate container is provided with a return pipe, the upper end of the return pipe is connected with the second displacement pipe, and the bottom end of the return pipe extends towards the inner bottom surface of the displacement intermediate container.
Preferably, the system further comprises a first three-way valve, wherein two connecting ports of the first three-way valve are respectively connected with the main pipeline, and the other connecting port is connected with a reserved pipe.
Preferably, the exhaust tube, the insertion tube, the sampling injector, the sampling tube, the sampling needle, the first replacement tube, the second replacement tube and the reserved tube are all connected by adopting a quick pipe joint.
The scheme of the utility model at least comprises the following beneficial effects:
1. according to the scheme, the inside of the replacement component and the inside of the sampling component can be in a vacuum state through the vacuum pump and the exhaust pipe, the material liquid remained in the sampling pipeline is collected through the replacement component, so that the sampling accuracy is guaranteed, after the sampling is finished, the liquid collected in the replacement component is in an atmospheric pressure state, and the liquid collected in the replacement component is returned to the sampling pipeline again by utilizing negative pressure, so that the pollution to the surrounding environment caused by the loss of the material liquid in the distillation tower is avoided;
2. according to the scheme, negative pressure sampling is carried out through the sampling assembly in a negative pressure state, so that sampling liquid can conveniently and rapidly enter the sampling assembly, the sampling efficiency is improved, and the accuracy of sample analysis is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the state of step one in the application of the present utility model;
FIG. 3 is a schematic diagram showing a second step of the present utility model;
FIG. 4 is a schematic diagram of the third step of the present utility model;
FIG. 5 is a schematic diagram showing a fourth step of the present utility model;
fig. 6 is a schematic diagram of the state of step five when the present utility model is applied.
The reference numerals are explained as follows:
1. a main pipe; 2. an exhaust pipe; 3. an insertion tube; 4. a first three-way valve; 5. a second three-way valve; 6. a third three-way valve; 7. a fourth three-way valve; 8. a fifth three-way valve; 9. a sampling syringe; 10. a sampling tube; 11. a sampling needle; 12. a first replacement tube; 13. a second replacement tube; 14. replacing the intermediate container; 15. a return pipe; 16. reserving a pipe; 17. sampling bottle.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1, the present utility model provides a vacuum sampling valve with a replacement function, comprising:
a main pipe 1, a replacement component and a sampling component;
the two ends of the main pipeline 1 are respectively provided with an exhaust pipe 2 connected with a vacuum pump and an insertion pipe 3 connected with a sampling port; the main pipeline 1 is sequentially provided with a replacement valve group and a sampling valve group, the replacement valve group is connected with the replacement component, and the sampling valve group is connected with the sampling component.
When sampling is carried out, the insertion pipe 3 is connected with the sampling port of the distillation column, the exhaust pipe 2 is connected with the vacuum pump, the replacement component is communicated with the main pipeline 1 through the replacement valve group, the sampling component is communicated with the main pipeline 1 through the sampling valve group, the vacuum pump works, the inside of the replacement component and the sampling component is in a negative pressure state, the sampling component is cut off from the main pipeline 1 through the sampling valve group, the inside of the sampling port of the distillation column is in a negative pressure state, deposited liquid in the sampling port of the distillation column enters the inside of the replacement component through the main pipeline 1, the deposited liquid is prevented from entering the inside of the sampling component, after the replacement of the deposited liquid is completed, the replacement component is cut off from the insertion pipe 3 through the replacement valve group, the sampling component is communicated with the main pipeline 1 through the sampling valve group, the inside of the sampling component and the sampling port of the distillation column are both in a negative pressure state, the liquid in the sampling port of the distillation column is convenient to enter the inside of the sampling component through the main pipeline 1 rapidly, and sampling can accelerate sampling, so that the sample analysis accuracy is ensured, and sampling time can be shortened to within 5min by adopting the structure of the device, compared with 60min of the existing sampling mode, the sample analysis accuracy is greatly improved, and the subsequent sample analysis accuracy is ensured; after the sampling is completed, the sampling component is cut off from the main pipeline 1 through the sampling valve group, the replacement component is communicated with the insertion pipe 3 through the replacement valve group, the vacuum pump stops working, the inside of the replacement component is restored to the atmospheric pressure, the deposition liquid in the replacement component returns to the inside of the sampling port of the distillation tower again through the main pipeline 1 and the insertion pipe 3 under the negative pressure effect of the sampling port of the distillation tower, the recovery of the liquid is realized, the replacement and recovery of the deposition liquid can be realized through the replacement component, the liquid loss can be effectively avoided, and the safety of the surrounding environment is ensured.
As an alternative embodiment, the sampling assembly comprises a sampling tube 10 and a sampling injector 9, the sampling valve group comprises a fourth three-way valve 7 and a fifth three-way valve 8, two of the connection ports of the fourth three-way valve 7 are respectively connected with the main pipeline 1, the other connection port is connected with the sampling injector 9, two of the connection ports of the fifth three-way valve 8 are respectively connected with the main pipeline 1, and the other connection port is connected with the sampling tube 10.
The end of the sampling tube 10 remote from the fifth three-way valve 8 is provided with a sampling needle 11.
The replacement assembly comprises a first replacement pipe 12, a second replacement pipe 13 and a replacement intermediate container 14, the replacement valve group comprises a second three-way valve 5 and a third three-way valve 6, two connection ports of the second three-way valve 5 are respectively connected with the main pipe 1, the other connection port is connected with the first replacement pipe 12, two connection ports of the third three-way valve 6 are respectively connected with the main pipe 1, the other connection port is connected with the second replacement pipe 13, and the first replacement pipe 12 and the second replacement pipe 13 are both communicated with the replacement intermediate container 14.
The surface of the displacement intermediate container 14 is provided with a return pipe 15, the upper end of the return pipe 15 is connected with the second displacement tube 13, the bottom end of the return pipe 15 extends towards the inner bottom surface of the displacement intermediate container 14, and the arrangement is that the liquid in the displacement intermediate container 14 is convenient to flow back to a sampling port of the distillation column through the second displacement tube 13 and the insertion tube 3 through the return pipe 15.
Preferably, in practical application, the volume of the displacement intermediate container 14 is set to about 10ml by about 3ml of the deposition liquid in the sampling port of the distillation column, so that the displacement intermediate container 14 can be ensured to collect the deposition liquid completely, the sampling assembly can accurately collect the sample liquid in the distillation column, and the analysis accuracy of the sample liquid is ensured.
The system also comprises a first three-way valve 4, wherein two connecting ports of the first three-way valve 4 are respectively connected with the main pipeline 1, and the other connecting port is connected with a reserved pipe 16.
The exhaust tube 2, the insertion tube 3, the sampling injector 9, the sampling tube 10, the sampling needle 11, the first replacement tube 12, the second replacement tube 13 and the reserved tube 16 are all connected by adopting quick pipe joints, so that the damaged parts are convenient to replace independently.
Sampling:
s1, inserting a sampling needle 11 into a sampling bottle 17, sequentially adjusting the states of a first three-way valve 4, a second three-way valve 5, a third three-way valve 6, a fourth three-way valve 7 and a fifth three-way valve 8, cutting off a reserved pipe 16 from a main pipe 1, enabling a first replacement pipe 12, a second replacement pipe 13, a sampling injector 9 and a sampling pipe 10 to be communicated with the main pipe 1, starting a vacuum pump, and enabling the main pipe 1, the first replacement pipe 12, the second replacement pipe 13, the sampling injector 9, the sampling pipe 10, a replacement intermediate container 14 and the sampling bottle 17 to be in a negative pressure state through the vacuum pump;
s2, adjusting states of the second three-way valve 5 and the third three-way valve 6, and communicating the main pipeline 1, the first replacement pipe 12, the replacement intermediate container 14, the second replacement pipe 13 and the insertion pipe 3 as shown in FIG. 3, wherein the interior of the replacement intermediate container 14 is in a negative pressure state under the action of a vacuum pump, and deposition liquid in a sampling port of the distillation tower flows into the interior of the replacement intermediate container 14 through the insertion pipe 3 and the second replacement pipe 13 under the action of the negative pressure;
s3, after the deposited liquid in the sampling port of the distillation column completely enters the replacement intermediate container 14, adjusting the first three-way valve 4, the third three-way valve 6 and the fourth three-way valve 7, as shown in FIG. 4, cutting off the communication between the vacuum pump and the main pipeline 1 through the first three-way valve 4, cutting off the communication between the second replacement pipe 13 and the insertion pipe 3 through the four-way valve, realizing the communication between the sampling injector 9 and the insertion pipe 3 through the fourth three-way valve 7, and operating the sampling injector 9 to enable the sampling injector 9 to extract the sample liquid in the sampling port of the distillation column;
s4, after the amount of the sample liquid extracted by the sampling injector 9 reaches a set value, adjusting a fifth three-way valve 8 to enable a sampling tube 10 to be communicated with the sampling injector 9, cutting off the sampling tube 10 from the insertion tube 3, operating the sampling injector 9, and injecting the sample liquid into a sampling bottle 17 through the sampling tube 10 and a sampling needle 11;
s5, after the sample liquid completely enters the sampling bottle 17, the first three-way valve 4, the third three-way valve 6, the fourth three-way valve 7 and the fourth five three-way valve are adjusted, the sampling injector 9 and the sampling tube 10 are cut off from the main pipeline 1, the first replacement tube 12, the replacement intermediate container 14, the second replacement tube 13 and the insertion tube 3 are communicated, the vacuum pump is closed, the replacement intermediate container 14 is communicated with the atmosphere and gradually returns to the normal pressure state, under the negative pressure effect of a sampling port of the distillation column, the deposited liquid in the replacement intermediate container 14 flows back into the sampling port of the distillation column through the return pipe 15, the second replacement tube 13 and the insertion tube 3, the manual stop valve of the sampling port of the distillation column is closed, and the sampling bottle 17 is taken down, so that the sampling is completed.
While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.
Claims (7)
1. A vacuum sampling valve that possesses replacement function, its characterized in that: comprising the following steps:
a main pipeline (1), a replacement component and a sampling component;
an exhaust pipe (2) connected with the vacuum pump and an insertion pipe (3) connected with the sampling port are respectively arranged at two ends of the main pipe (1); the main pipeline (1) is sequentially provided with a replacement valve group and a sampling valve group, the replacement valve group is connected with the replacement assembly, and the sampling valve group is connected with the sampling assembly.
2. The vacuum sampling valve with a replacement function according to claim 1, wherein: the sampling assembly comprises a sampling tube (10) and a sampling injector (9), the sampling valve group comprises a fourth three-way valve (7) and a fifth three-way valve (8), two of the four three-way valve (7) are respectively connected with the main pipeline (1), the other connecting port is connected with the sampling injector (9), two of the fifth three-way valve (8) are respectively connected with the main pipeline (1), and the other connecting port is connected with the sampling tube (10).
3. The vacuum sampling valve with a replacement function according to claim 2, wherein: the end part of the sampling tube (10) far away from the fifth three-way valve (8) is provided with a sampling needle (11).
4. The vacuum sampling valve with a replacement function according to claim 3, wherein: the replacement assembly comprises a first replacement pipe (12), a second replacement pipe (13) and a replacement intermediate container (14), the replacement valve group comprises a second three-way valve (5) and a third three-way valve (6), two connection ports of the second three-way valve (5) are respectively connected with the main pipe (1), the other connection port is connected with the first replacement pipe (12), two connection ports of the third three-way valve (6) are respectively connected with the main pipe (1), the other connection port is connected with the second replacement pipe (13), and the first replacement pipe (12) and the second replacement pipe (13) are both communicated with the replacement intermediate container (14).
5. The vacuum sampling valve with a replacement function according to claim 4, wherein: the surface of the replacement intermediate container (14) is provided with a return pipe (15), the upper end of the return pipe (15) is connected with the second replacement pipe (13), and the bottom end of the return pipe (15) extends towards the inner bottom surface of the replacement intermediate container (14).
6. The vacuum sampling valve with a replacement function according to claim 5, wherein: the system further comprises a first three-way valve (4), wherein two connecting ports of the first three-way valve (4) are respectively connected with the main pipeline (1), and the other connecting port is connected with a reserved pipe (16).
7. The vacuum sampling valve with a replacement function according to claim 6, wherein: the extraction tube (2), the insertion tube (3), the sampling injector (9), the sampling tube (10), the sampling needle (11), the first replacement tube (12), the second replacement tube (13) and the reserved tube (16) are all connected by adopting quick pipe joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321914698.9U CN220322823U (en) | 2023-07-20 | 2023-07-20 | Vacuum sampling valve with replacement function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321914698.9U CN220322823U (en) | 2023-07-20 | 2023-07-20 | Vacuum sampling valve with replacement function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220322823U true CN220322823U (en) | 2024-01-09 |
Family
ID=89416734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321914698.9U Active CN220322823U (en) | 2023-07-20 | 2023-07-20 | Vacuum sampling valve with replacement function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220322823U (en) |
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2023
- 2023-07-20 CN CN202321914698.9U patent/CN220322823U/en active Active
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