CN210088454U - Large capacity gas cylinder standard gas preparation facilities - Google Patents
Large capacity gas cylinder standard gas preparation facilities Download PDFInfo
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- CN210088454U CN210088454U CN201920899768.5U CN201920899768U CN210088454U CN 210088454 U CN210088454 U CN 210088454U CN 201920899768 U CN201920899768 U CN 201920899768U CN 210088454 U CN210088454 U CN 210088454U
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Abstract
The utility model discloses a large capacity gas cylinder standard gas preparation facilities, include: the gas distribution device comprises a large-capacity gas cylinder, an auxiliary raw material gas cylinder, an electronic balance, a constant-volume gas distribution pipeline, a gas distribution ball valve and a pressure gauge, wherein the auxiliary raw material gas cylinder and the large-capacity gas cylinder are respectively connected to the gas inlet end and the gas outlet end of the gas distribution device through the constant-volume gas distribution pipeline; the gas distribution ball valve is arranged on a constant volume gas distribution pipeline between the auxiliary raw material gas cylinder and the gas distribution device, and the pressure gauge is arranged on the constant volume gas distribution pipeline in the gas distribution device; the utility model discloses widened the scope of large capacity gas cylinder component filling volume, the auxiliary raw materials gas cylinder can make to weigh the definite value more accurate in high accuracy electronic balance's weighing range, has simplified the process flow of the middle dilution gas method that traditional configuration large capacity gas cylinder adopted, and save raw materials, reduce cost does not have too much loss, and the supplementary gas cylinder reuse of raw materials, and the principle is simple, does not have unnecessary operation, device simple structure.
Description
Technical Field
The utility model relates to a standard gas preparation technical field, concretely relates to large capacity gas cylinder standard gas preparation facilities.
Background
Common standard gases comprise gas alarm standard gases, electric power energy standard gases, petrochemical industry standard gases, environment-friendly monitoring standard gases, medical and health standard gases, instrument and meter standard gases and the like according to purposes. The standard gas can also be used for environmental monitoring, toxic organic matter measurement, automobile exhaust gas test, natural gas BTU measurement, liquefied petroleum gas calibration standard, supercritical fluid process and the like. The standard gas vision gas component scores are divided into binary, ternary and multivariate standard gases, the gas distribution accuracy requirement is characterized by gas distribution tolerance and analysis tolerance, and the standard is generally used as the standard of SE2MI gas distribution tolerance.
At present, the market demand of the whole standard gas is more and more increased, and the demand of the large-capacity standard gas is also increased. The large-capacity gas cylinder generally refers to a gas cylinder with the mass of about 40KG, and the currently commonly used electronic balance has the parameters of 14.2KG and the sensing quantity of 0.01g, so that the large-capacity gas cylinder is difficult to weigh, only investment can be increased, and a large-range electronic balance is purchased, but the sensing quantity of the large-range electronic balance is correspondingly increased, so that the gas adding quantity is limited, and the component error of charging below 20g is large. With the increasing demand of standard gas of low-concentration large-capacity gas cylinders, the demand can be met by adding 20g or even 1.00g of trace components into the large-capacity gas cylinders.
In the prior art, there is a method of converting weighing by using an auxiliary gas cylinder, such as a device disclosed in patent CN205850772U, the device is connected with an inflator, and the device for preparing standard gas of a large-capacity gas cylinder comprises a large-capacity gas cylinder, an auxiliary gas cylinder, an electronic balance, a tee joint and a gas distribution ball valve. The high-capacity gas cylinder, the auxiliary gas cylinder and the gas distribution ball valve are respectively connected with three ports of the tee joint through pipelines, the gas distribution ball valve is connected with the gas charging device through a pipeline, and the electronic balance is arranged at the bottom of the auxiliary gas cylinder. The device solves the problem that the mixed gas meeting the preparation proportion is difficult to fill in the large-capacity gas cylinder by arranging the auxiliary gas cylinder, and realizes that the mixed gas meeting the standard is filled in the large-capacity gas cylinder. However, the auxiliary gas cylinder is directly connected with the large-capacity gas cylinder, so that gas leakage is easy to occur in the repeated gas filling process, and errors are increased. In addition, the filling amount of the large-capacity gas cylinder is several times that of the auxiliary gas cylinder, the adding amount is limited, the requirement of trace components is not met, one bottle of auxiliary gas can be correspondingly wasted without configuring one bottle of large-capacity standard gas, and the cost is increased.
Still like patent CN208254617U discloses a device, the device utilizes lever principle, has enlarged the weighing range of large capacity gas cylinder, but the device is loaded down with trivial details complicacy, and the operation is wasted time and energy, and the factor that influences the accuracy is many. Under the technical background, a device for preparing standard gas of a large-capacity gas cylinder is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a large capacity gas cylinder standard gas preparation facilities to and the error of solving prior art existence is big, and the addition receives the restriction, unsatisfied micro-component requirement, and the loaded down with trivial details complicacy of device, the higher problem of cost.
The utility model provides a large capacity gas cylinder standard gas preparation facilities, include: the device comprises a large-capacity gas cylinder, an auxiliary raw material gas cylinder, an electronic balance, a constant-volume gas distribution pipeline, a gas distribution ball valve and a pressure gauge;
the auxiliary raw material gas cylinder and the high-capacity gas cylinder are respectively connected to the gas inlet end and the gas outlet end of the gas distribution device through constant-volume gas distribution pipelines, and the auxiliary raw material gas cylinder is arranged on the electronic balance; the gas distribution ball valve is arranged on a constant volume gas distribution pipeline between the auxiliary raw material gas cylinder and the gas distribution device, and the pressure gauge is arranged on the constant volume gas distribution pipeline in the gas distribution device.
Optionally, the volume of the large-capacity gas cylinder is greater than 20L, and the mass of the large-capacity gas cylinder is greater than 14.2 KG.
Optionally, the volume of the auxiliary raw material gas cylinder is less than 10L, and the mass of the auxiliary raw material gas cylinder is less than 14.2 KG.
Optionally, the constant volume gas distribution pipeline is a stainless steel pipeline with a constant volume of 150 ml.
Optionally, the range of the electronic balance is 14.2KG, and the sensing quantity is 0.01g
The utility model has the advantages as follows: the utility model discloses a large capacity gas cylinder standard gas preparation facilities, include: the gas distribution device comprises a large-capacity gas cylinder, an auxiliary raw material gas cylinder, an electronic balance, a constant-volume gas distribution pipeline, a gas distribution ball valve and a pressure gauge, wherein the auxiliary raw material gas cylinder and the large-capacity gas cylinder are respectively connected to the gas inlet end and the gas outlet end of the gas distribution device through the constant-volume gas distribution pipeline; the gas distribution ball valve is arranged on a constant volume gas distribution pipeline between the auxiliary raw material gas cylinder and the gas distribution device, the pressure gauge is arranged on the constant volume gas distribution pipeline in the gas distribution device, when in use, the weighing mode is switched by reversely weighing the auxiliary raw material gas cylinder, the adding amount is accurately calculated by combining the constant volume gas distribution pipeline, the mass conservation law is met, the range of the charging amount of the components of the large-capacity gas cylinder is widened, 1g can be added at minimum, the auxiliary raw material gas cylinder is in the weighing range of the high-precision electronic balance, the weighing and the setting value can be more accurate, the process flow of an intermediate dilution gas method adopted by the traditional configuration of the large-capacity gas cylinder is greatly simplified, the requirement can be met by adding the auxiliary raw material gas cylinder once, the cost is reduced, the reduced amount of the auxiliary raw material gas cylinder is the adding amount of the large-capacity gas cylinder, excessive, the device has simple structure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a large-capacity gas cylinder standard gas preparation device provided by the utility model.
Illustration of the drawings: 1-a large-capacity gas cylinder; 2-auxiliary raw material gas cylinder; 3-an electronic balance; 4-constant volume gas distribution pipeline; 5-an air distribution ball valve; 6-pressure gauge; 100-air distribution device.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1, an embodiment of the present invention provides a large capacity gas cylinder standard gas preparation device, for cooperating with a general standard gas configuration device 100, the large capacity gas cylinder standard gas preparation device includes: the device comprises a large-capacity gas cylinder 1, an auxiliary raw material gas cylinder 2, an electronic balance 3, a constant-volume gas distribution pipeline 4, a gas distribution ball valve 5 and a pressure gauge 6.
The auxiliary raw material gas cylinder 2 and the large-capacity gas cylinder 1 are respectively connected to the gas inlet end and the gas outlet end of the gas distribution device 100 through a constant-volume gas distribution pipeline 4, and the auxiliary raw material gas cylinder 2 is arranged on the electronic balance 3. The large-capacity gas cylinder 1 is used for storing filled standard gas, the auxiliary raw material gas cylinder 2 is used for storing auxiliary raw material gas to be added, and the configuration device 100 is an existing device. The electronic balance 3 is used for weighing the mass of the auxiliary raw material gas cylinder 2.
In this embodiment, the volume of the large-capacity gas cylinder 1 is greater than 20L, and the mass is greater than 14.2 KG. The volume of the auxiliary raw material gas cylinder 2 is less than 10L, and the mass is less than 14.2 KG. The range of the electronic balance 3 is 14.2KG, the sensing quantity is 0.01g, and the constant volume gas distribution pipeline 4 is a stainless steel pipeline with a constant volume of 150 ml.
Further, the gas distribution ball valve 5 is arranged on the constant volume gas distribution pipeline 4 between the auxiliary raw material gas cylinder 2 and the gas distribution device 100 and used for controlling the conduction and the closing of a gas path between the auxiliary raw material gas cylinder 2 and the gas distribution device 100, and the pressure gauge 6 is arranged on the constant volume gas distribution pipeline 4 in the gas distribution device 100 and used for detecting the pressure of gas in the constant volume gas distribution pipeline 4.
The utility model discloses a large capacity gas cylinder standard gas preparation facilities's application method as follows:
taking the example of preparing 40L of a standard gas containing 0.1% oxygen and 0.1% carbon dioxide in 10MPa nitrogen, it was calculated that 5.71g of oxygen was required.
Firstly, the auxiliary raw material gas cylinder 2 and the large-capacity gas cylinder 1 are pretreated, and the auxiliary raw material gas cylinder 2 and the large-capacity gas cylinder 1 can be heated at 90 ℃ and vacuumized for 20min to ensure that the vacuum degree of the auxiliary raw material gas cylinder 2 and the large-capacity gas cylinder 1 is less than 1 Pa.
Then, oxygen gas was transferred from the centralized tank into the evacuated auxiliary raw material cylinder 2, and the auxiliary raw material cylinder 2 was placed on an electronic balance 3 to record a weight of 7894.13 g.
And then, connecting the auxiliary raw material gas cylinder 2, the constant-volume gas distribution pipeline 4 and the large-capacity gas cylinder 1 to two sides of the gas distribution device 100, vacuumizing the whole system for 5min, and pumping out air in the whole gas circuit.
And then, slowly opening the auxiliary raw material gas cylinder 2, opening the large-capacity gas cylinder 1, then opening the gas distribution ball valve 5, starting to fill gas into the large-capacity gas cylinder 1, observing the pressure gauge 6, and when the reading of the pressure gauge 6 is close to the theoretical pressure, closing the gas distribution ball valve 5, closing the auxiliary raw material gas cylinder 2 and closing the large-capacity gas cylinder 1.
At the moment, the gas distribution ball valve 5 is opened, oxygen in the left constant volume gas distribution pipeline 4 is released, and the reading of the pressure gauge 6 is recorded as 100 KPa. And releasing the residual pressure in the gas distribution pipeline 4, and unloading the auxiliary raw material gas cylinder 2. When the reading number of the electronic balance 3 is 7888.24g, the oxygen reduction amount of the auxiliary raw material gas cylinder 2 is 7894.13-7888.24-5.89 g.
Calculating loss of constant volume 150ml gas distribution pipeline by using gas engineering formulaTherefore, the accurate addition amount of oxygen gas of the large-capacity gas cylinder 1 is 5.89-0.19-5.70 g through combination calculation.
The steps are repeated, 7.86g of carbon dioxide is continuously added into the large-capacity gas cylinder 1 in the same way, the adding amount of nitrogen serving as bottom gas is up to 5000g, the low-precision large-scale platform weighing can be used for weighing, and the influence on the result can be ignored.
Therefore, utilize the embodiment of the utility model provides a large capacity gas cylinder standard gas that large capacity gas cylinder standard gas preparation facilities disposed out, oxygen concentration is ultralow, accords with customer's demand through detecting the uncertainty, owing to considered the pipeline loss, makes the preparation precision promote greatly, has realized the batch production of little packing low concentration standard gas in the past. The utility model discloses a preparation facilities is gaseous still is applicable to the configuration of the large capacity gas cylinder standard of more components, and whole process accords with the law of conservation of mass, and the definite value is accurate, easy operation.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a large capacity gas cylinder standard gas preparation facilities which characterized in that includes: the device comprises a large-capacity gas cylinder (1), an auxiliary raw material gas cylinder (2), an electronic balance (3), a constant-volume gas distribution pipeline (4), a gas distribution ball valve (5) and a pressure gauge (6);
the auxiliary raw material gas cylinder (2) and the large-capacity gas cylinder (1) are respectively connected to the gas inlet end and the gas outlet end of the gas distribution device (100) through a constant-volume gas distribution pipeline (4), and the auxiliary raw material gas cylinder (2) is arranged on the electronic balance (3); the gas distribution ball valve (5) is arranged on a constant volume gas distribution pipeline (4) between the auxiliary raw material gas bottle (2) and the gas distribution device (100), and the pressure gauge (6) is arranged on the constant volume gas distribution pipeline (4) in the gas distribution device (100).
2. A large capacity gas cylinder standard gas preparation device according to claim 1, characterized in that the large capacity gas cylinder (1) has a volume of more than 20L and a mass of more than 14.2 KG.
3. A large capacity gas cylinder standard gas preparation device as claimed in claim 2, characterized in that the volume of the auxiliary raw material gas cylinder (2) is less than 10L, and the mass is less than 14.2 KG.
4. The large-capacity gas cylinder standard gas preparation device according to claim 3, wherein the constant volume gas distribution pipeline (4) is a stainless steel pipeline with a constant volume of 150 ml.
5. A large capacity gas cylinder standard gas preparation device according to claim 4, characterized in that the electronic balance (3) has a measuring range of 14.2KG and a sensing quantity of 0.01 g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920899768.5U CN210088454U (en) | 2019-06-15 | 2019-06-15 | Large capacity gas cylinder standard gas preparation facilities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920899768.5U CN210088454U (en) | 2019-06-15 | 2019-06-15 | Large capacity gas cylinder standard gas preparation facilities |
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| Publication Number | Publication Date |
|---|---|
| CN210088454U true CN210088454U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920899768.5U Active CN210088454U (en) | 2019-06-15 | 2019-06-15 | Large capacity gas cylinder standard gas preparation facilities |
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| CN (1) | CN210088454U (en) |
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