CN211716247U - Low-pressure gas constant-current device - Google Patents
Low-pressure gas constant-current device Download PDFInfo
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- CN211716247U CN211716247U CN202020009708.4U CN202020009708U CN211716247U CN 211716247 U CN211716247 U CN 211716247U CN 202020009708 U CN202020009708 U CN 202020009708U CN 211716247 U CN211716247 U CN 211716247U
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Abstract
The utility model discloses a low-pressure gas constant-current device, which comprises a system gas tank, wherein the system gas tank is connected with one side of a first container tank through a first connecting pipeline, a stop valve is arranged on the first connecting pipeline, the bottom of the first container tank is connected with the bottom of a second container tank through a second connecting pipeline, a proper amount of liquid is arranged in the first container tank and the second container tank, the side surface of the first container tank is connected with the side surface of the second container tank through a third connecting pipeline, the top of the second container tank is connected with a pretreatment device through a fourth connecting pipeline, and the pretreatment device is connected with an analytical instrument; the utility model discloses not only guarantee that online gas analysis appearance's air inlet flow is invariable, reduce the influence of air supply fluctuation to analytical instrument, possess gaseous washing function moreover, can wash the cooling to gas, reduce preprocessing device's load, still simple structure, convenient for material collection, low cost, the maintenance of being convenient for.
Description
Technical Field
The utility model relates to a gas analysis technical field specifically indicates a low pressure gas constant current device.
Background
On-line gas analysis instrument is as the operator's otoscope at chemical production, and the instability of the air supply that gets into the analysis appearance can influence on-line analysis appearance measuring stability and reliability to lead to the operator maloperation, light person influences the technology stability of apparatus for producing, and heavy person can lead to process equipment to damage and environmental pollution accident, so on-line analysis appearance measuring stability and reliability are vital, and whether the air supply can be continuous invariable gets into the analysis appearance then more important.
Most of gas measuring devices in the market at present are not provided with corresponding gas constant flow devices, the size of an inlet gas source is adjusted mainly by a manual stop valve before entering an analyzer pretreatment device, the flexibility is lacked, and meanwhile, the stability of the gas flow entering the analyzer pretreatment device cannot be ensured, so that the stability and the reliability of the measurement of an online analyzer are influenced; although a few online gas analyzers are provided with constant-current devices, the constant-current output of gas is ensured by a control loop formed by elements such as a regulating valve, a pressure sensor and a PLC (programmable logic controller).
Therefore, it is necessary to design a low-pressure gas constant flow device to solve the above problems.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a gaseous constant current device of low pressure, not only solved the problem that the unstability of system gas caused the influence to analytical instrument in the daily production process, simple structure, convenient for material collection moreover, low cost is convenient for maintain.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the utility model provides a low pressure gas constant current device, includes the system gas jar, the system gas jar is connected through first connecting tube and first container tank one side, is equipped with the stop valve on first connecting tube, and first container tank bottom is connected through second connecting tube and second container tank bottom, is equipped with appropriate amount of liquid in first container tank and the second container tank, and first container tank side is connected with second container tank side through the third connecting tube, and second container tank top is connected with preprocessing device through the fourth connecting tube, and preprocessing device is connected with analytical instrument.
Preferably, the first container tank and the second container tank are detachably connected with the connecting pipes.
Preferably, the joints of the first container tank and the second container tank and the connecting pipelines are sealed by sealing covers with screw threads.
Preferably, the liquid in the first and second canisters is water.
The utility model has the advantages that:
1. the gas inlet flow of the on-line gas analyzer is ensured to be constant, and the influence of gas source fluctuation on the analyzer is reduced;
2. the device has a gas washing function, can clean and cool gas, and reduces the load of a pretreatment device;
3. the device has the advantages of simple structure, convenient material acquisition, low cost and convenient maintenance.
Drawings
FIG. 1 is a schematic structural view of a low-pressure gas constant-flow device;
in the figure, a system gas tank 1, a first connecting pipeline 2, a first container tank 3, a stop valve 4, a second connecting pipeline 5, a second container tank 6, a third connecting pipeline 7, a fourth connecting pipeline 8, a pretreatment device 9 and an analysis instrument 10.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1, a low-pressure gas constant-current device comprises a system gas tank 1, wherein the system gas tank 1 is connected with one side of a first container tank 3 through a first connecting pipeline 2, a stop valve 4 is arranged on the first connecting pipeline 2, the bottom of the first container tank 3 is connected with the bottom of a second container tank 6 through a second connecting pipeline 5, a proper amount of liquid is arranged in the first container tank 3 and the second container tank 6, the side surface of the first container tank 3 is connected with the side surface of the second container tank 6 through a third connecting pipeline 7, the top of the second container tank 6 is connected with a pretreatment device 9 through a fourth connecting pipeline 8, and the pretreatment device 9 is connected with an analysis instrument 10.
Preferably, the first container tank 3 and the second container tank 6 are detachably connected with the connecting pipes. Such an arrangement facilitates routine cleaning and maintenance.
Preferably, the joints of the first container tank 3 and the second container tank 6 and the connecting pipelines are sealed by using threaded sealing covers. Such an arrangement facilitates routine cleaning and maintenance.
Preferably, the liquid in the first canister 3 and the second canister 6 is water. Such an arrangement has a gas washing function, and can wash and cool the gas, thereby reducing the load on the pretreatment device 9.
In this embodiment, the analyzer 10 is an on-line gas analyzer, and the pretreatment device 9 is a VOC pretreatment tank. The liquid in the first and second vessels 3 and 6 is water. Stop valve 4 is full open mode, reduces because of the valve is not full, and the gas velocity of flow is slow, and impurity easily piles up the risk of blockking up the valve in the gas, guarantees that normal production is not influenced.
The working principle of the embodiment is as follows: process gas in the system gas tank 1 enters the first container tank 3 through the stop valve 4, when the pressure in the first container tank 3 is saturated, water higher than the level of the third connecting pipeline 7 is pressed into the second container tank 6 through air pressure, the process gas is fully connected with the third connecting pipeline 7 and then enters the pretreatment device 9 through the fourth connecting pipeline 8 at the top of the second container tank 6, the height of the liquid level in the second container tank 6 is in direct proportion to the system air pressure, and therefore the flow of a gas source entering the analytical instrument 10 is guaranteed to be constant. When the pressure of the system gas tank 1 rises, the process gas in the system gas tank 1 enters the first container tank 3 through the stop valve 4, the gas flow rate through the third connecting pipeline 7 is increased, after the gas flow rate through the third connecting pipeline 7 exceeds the upper flow limit of the third connecting pipeline 7, the water in the first container tank 3 is completely pressed into the second container tank 6 through the second connecting pipeline 5, at the moment, the water in the second container tank 6 forms a liquid seal, the gas enters the pretreatment device 9 from the third connecting pipeline 7 through the liquid seal of the second container tank 6, and the outlet of the pretreatment device 9 is connected with the analysis instrument 10. The first container tank 3 and the second container tank 6 form a communicating vessel, the pressure at the inlet of the first container tank 3 is increased or decreased, the liquid level in the second container tank 6 is increased or decreased along with the pressure, and the gas flow at the outlet of the second container tank 6 is ensured to be constant, so that the gas flow entering the analysis instrument 10 is ensured to be constant.
The utility model discloses not only guarantee that online gas analysis appearance's air inlet flow is invariable, reduce the influence of air supply fluctuation to analytical instrument, possess gaseous washing function moreover, can wash the cooling to gas, reduce preprocessing device's load, still simple structure, convenient for material collection, low cost, the maintenance of being convenient for.
The above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (4)
1. A low-pressure gas constant-flow device comprises a system gas tank (1), and is characterized in that: the system gas tank (1) is connected with one side of the first container tank (3) through the first connecting pipeline (2), the stop valve (4) is arranged on the first connecting pipeline (2), the bottom of the first container tank (3) is connected with the bottom of the second container tank (6) through the second connecting pipeline (5), a proper amount of liquid is arranged in the first container tank (3) and the second container tank (6), the side of the first container tank (3) is connected with the side of the second container tank (6) through the third connecting pipeline (7), the top of the second container tank (6) is connected with the pretreatment device (9) through the fourth connecting pipeline (8), and the pretreatment device (9) is connected with the analytical instrument (10).
2. A low-pressure gas constant flow device according to claim 1, wherein: the first container tank (3), the second container tank (6) and each connecting pipeline are detachably connected.
3. A low-pressure gas constant flow device according to claim 2, wherein: the joints of the first container tank (3), the second container tank (6) and each connecting pipeline are sealed by sealing covers with screw threads.
4. A low-pressure gas constant flow device according to claim 1, wherein: the liquid in the first container tank (3) and the second container tank (6) is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020009708.4U CN211716247U (en) | 2020-01-03 | 2020-01-03 | Low-pressure gas constant-current device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020009708.4U CN211716247U (en) | 2020-01-03 | 2020-01-03 | Low-pressure gas constant-current device |
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| CN211716247U true CN211716247U (en) | 2020-10-20 |
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| CN202020009708.4U Active CN211716247U (en) | 2020-01-03 | 2020-01-03 | Low-pressure gas constant-current device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092314A (en) * | 2021-03-19 | 2021-07-09 | 西安工程大学 | Super-hydrophobic surface resistance reduction performance testing device under high flow rate |
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2020
- 2020-01-03 CN CN202020009708.4U patent/CN211716247U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092314A (en) * | 2021-03-19 | 2021-07-09 | 西安工程大学 | Super-hydrophobic surface resistance reduction performance testing device under high flow rate |
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