CN203606251U - Device for increasing container vacuum degree in static volumetric method - Google Patents
Device for increasing container vacuum degree in static volumetric method Download PDFInfo
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- CN203606251U CN203606251U CN201320736950.1U CN201320736950U CN203606251U CN 203606251 U CN203606251 U CN 203606251U CN 201320736950 U CN201320736950 U CN 201320736950U CN 203606251 U CN203606251 U CN 203606251U
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- liquid nitrogen
- vacuum pump
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- vacuum degree
- container
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Abstract
The utility model discloses a device for increasing container vacuum degree in a static volumetric method. The device comprises an air inlet, a plurality of electromagnetic valves, a fixed container, a pressure sensor, a vacuum pump and a liquid nitrogen container, wherein the liquid nitrogen container is full of liquid nitrogen; the pressure sensor, the vacuum pump, the air inlet and the sample pipe are connected to the fixed container; the electromagnetic valves are arranged in front of the air inlet, the vacuum pump and the sample pipe. The device for increasing container vacuum degree in the static volumetric method is a part of a physical absorption apparatus, and is mainly used for providing a proper adsorption pressure to a sample; the device is simple in structure, reasonable in design, low in operating cost, convenient to operate, and high in reliability.
Description
Technical field
The utility model relates to a kind of experimental provision, specifically relates to the device that increases vacuum degree of vessel in a kind of static capacity method.
Background technology
Any powder surface has the ability of adsorption gas molecule, under liquid nitrogen temperature, in nitrogenous atmosphere, powder surface can be to nitrogen gas generation physisorption, in air, the content of nitrogen accounts for 78%, static capacity method is a kind of important method of measuring porosint specific surface area and factor of porosity, it is a kind of low temperature physics absorption method, before implementing the method, need first through vacuumize degassing, then make whole system reach required vacuum tightness, sometimes due to the defect of vacuum pump, can not reach the required vacuum tightness of experiment, this just need to have other device to make up.
Summary of the invention
The utility model is mainly to solve the existing technical matters of above-mentioned prior art, and the device that increases vacuum degree of vessel in a kind of static capacity method is provided.This device comprises air intake opening, solenoid valve, constant volume device, multiple sample hoses, pressure transducer, vacuum pump and liquid nitrogen container, filled with liquid nitrogen in liquid nitrogen container, on constant volume device, be connected with pressure transducer, vacuum pump, air intake opening and sample hose, air intake opening, before vacuum pump and sample hose, be equipped with solenoid valve, when device is started working, in a sample hose, pack air adsorption agent into, in other sample, place the sample of sorbent accurately weighing, close the solenoid valve before air intake opening, open the solenoid valve before vacuum pump and sample hose, first vacuumized to system by vacuum pump, if vacuum tightness does not reach experiment necessary requirement, close the solenoid valve before vacuum pump, the sample hose that air adsorption agent is housed is put into liquid nitrogen submergence, because air adsorption agent is equipped with in sample hose inside, when adsorbent is placed under liquid nitrogen temperature, adsorbent absorbed air, now constant volume device internal pressure declines, reach the object that increases vacuum tightness, again the sample hose that packs sample of sorbent into is placed in to liquid nitrogen and carries out subsequent experimental.
As preferentially, described sample hose is U-shaped pipe, and the quantity of sample hose can be according to experiment Demand Design.
As preferentially, described solenoid valve is direct-acting electromagnetic valve.
The device that the utility model increases vacuum degree of vessel is a part for physisorption instrument, and Main Function is the adsorptive pressure suitable to offering sample, and this apparatus structure is simple, reasonable in design, operating cost is low, easy to operate, reliability is high.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present utility model.
Description of reference numerals:
In figure, 1 is air intake opening, and 2 is a solenoid valve, 3 No. two solenoid valves, and 4 is No. three solenoid valves, and 7 is No. four solenoid valves, and 6 is sample hoses, 5 No. two sample hoses, the 8th, pressure transducer, the 9th, constant volume device, the 10th, vacuum pump, the 11st, liquid nitrogen, the 12nd, liquid nitrogen container.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: referring to Fig. 1, take two sample hoses as example, above-mentioned technical matters of the present utility model is mainly solved by following technical proposals:
The device that increases vacuum degree of vessel in a kind of static capacity method comprises air intake opening 1, a solenoid valve 2, No. two solenoid valves 3, No. three solenoid valves 4, No. four solenoid valves 7, a sample hose 6, No. two sample hoses 5, pressure transducer 8, constant volume device 9, vacuum pump 10, liquid nitrogen 11 and liquid nitrogen container 12, filled with liquid nitrogen 11 in liquid nitrogen container 12, is connected with pressure transducer 8 on constant volume device 9, vacuum pump 10, air intake opening 1, a sample hose 6 and No. two sample hoses 5, air intake opening 1, vacuum pump 10, before a sample hose 6 and No. two sample hoses 5, be respectively equipped with solenoid valve 2 No. one, No. four solenoid valves 7, No. two solenoid valves 3 and No. three solenoid valves 4, when device is started working, in No. two sample hoses 5, pack air adsorption agent into, in a sample hose 6, place the sample of sorbent accurately weighing, close a solenoid valve 2 before air intake opening, open the solenoid valve 7 before vacuum pump 10, No. two solenoid valves 3 and No. three solenoid valves 4 before sample hose, first vacuumized to system by vacuum pump 10, if vacuum tightness does not reach experiment necessary requirement, close the solenoid valve 7 before vacuum pump 10, No. two sample hoses 5 that air adsorption agent is housed are put into liquid nitrogen submergence, because air adsorption agent is equipped with in sample hose inside, when adsorbent is placed under liquid nitrogen temperature, adsorbent absorbed air, now constant volume device 9 internal pressures decline, reach and increase the object of vacuum tightness, then will pack sample hose 6 of sample of sorbent into and be placed in liquid nitrogen and carry out subsequent experimental.
It is a part for physisorption instrument that the utility model increases vacuum, and Main Function is the adsorptive pressure suitable to offering sample, and this apparatus structure is simple, reasonable in design, operating cost is low, easy to operate, reliability is high.
Finally, it should be pointed out that above embodiment is only the more representational example of the utility model.Obviously, the utility model is not limited to above-described embodiment, can also have many distortion.Any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all should think and belong to protection domain of the present utility model.
Claims (3)
1. in a static capacity method, increase the device of vacuum degree of vessel, comprise air intake opening, solenoid valve, constant volume device, sample hose, pressure transducer, vacuum pump and liquid nitrogen container, filled with liquid nitrogen in liquid nitrogen container, it is characterized in that being connected with pressure transducer, vacuum pump, air intake opening and sample hose on described constant volume device, before air intake opening, vacuum pump and sample hose, be equipped with solenoid valve.
2. the device that increases according to claim 1 vacuum degree of vessel in a kind of static capacity method, is characterized in that described sample hose is U-shaped pipe.
3. the device that increases according to claim 1 vacuum degree of vessel in a kind of static capacity method, is characterized in that described solenoid valve is direct-acting electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736950.1U CN203606251U (en) | 2013-11-20 | 2013-11-20 | Device for increasing container vacuum degree in static volumetric method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320736950.1U CN203606251U (en) | 2013-11-20 | 2013-11-20 | Device for increasing container vacuum degree in static volumetric method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203606251U true CN203606251U (en) | 2014-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320736950.1U Expired - Fee Related CN203606251U (en) | 2013-11-20 | 2013-11-20 | Device for increasing container vacuum degree in static volumetric method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203606251U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879659A (en) * | 2020-08-26 | 2020-11-03 | 中国石油大学(华东) | Hydrogen absorption agent evaluation device for low-temperature container |
-
2013
- 2013-11-20 CN CN201320736950.1U patent/CN203606251U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879659A (en) * | 2020-08-26 | 2020-11-03 | 中国石油大学(华东) | Hydrogen absorption agent evaluation device for low-temperature container |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140521 Termination date: 20151120 |
|
| EXPY | Termination of patent right or utility model |