CN211317384U - Device for continuously measuring gas - Google Patents
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- CN211317384U CN211317384U CN201921738915.7U CN201921738915U CN211317384U CN 211317384 U CN211317384 U CN 211317384U CN 201921738915 U CN201921738915 U CN 201921738915U CN 211317384 U CN211317384 U CN 211317384U
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Abstract
The utility model discloses a last gaseous device of surveying, including first airtight container, second airtight container, air inlet pipeline, fluid-discharge tube and the pipeline of giving vent to anger, be equipped with two and measure the route, can switch over the measurement route to and the fluid-discharge tube flow direction through the valve that changes air inlet pipeline and air outlet pipeline three-way valve on the road, simple structure, convenient operation. The two measuring channels can be switched infinitely, so that the measurement is carried out continuously, the gas with large volume flow can be measured in an accumulated mode without being limited by the range of the container, and the applicability is strong; the measurement of different gases is short in connection time, fast and efficient. The controller receives the liquid level change information and switches the measurement channel in time, and calculates the flow and the flow velocity of the gas to be measured, so that the response speed is high, and the measurement precision is high. Aiming at the gas with small gas flow and more impurities, the influence of impurities is reduced and the measurement accuracy is improved by arranging the forward and reverse liquid discharge pipes and the filtering component.
Description
Technical Field
The utility model belongs to the measurement field, concretely relates to last gaseous device of survey.
Background
There are many instruments for measuring gasesAnd means, but all have certain requirements on gas flow and gas cleanliness. For example, the vortex street flowmeter must require the gas flow rate to be 0.3m3The measurement can be carried out for more than h, the accuracy of the floater and the rotor flow meter is poor, and the soap film and the mass flow meter have higher requirements on gas purity and are easy to damage. The above flowmeter is difficult to realize the accurate measurement of insoluble gas with more impurities and smaller flow.
The Chinese patent application with the application number of 201910127035.4 discloses a gas flow measuring device and a measuring method, wherein constant pressure gas is used for pushing liquid in a first closed container to flow into a second closed container, and the gas in the second closed container is pushed by the inflowing liquid to be discharged from a gas outlet pipeline; and converting the liquid volume change according to the liquid level change in the first closed container or the second closed container to obtain the accumulated volume flow and the flow rate of the gas discharged from the gas outlet pipeline. The measuring device is easy to operate, can measure micro-flow gas, has high measuring precision and large measuring range, but in the process of measuring the gas flow with a lot of impurities, the impurities are accumulated in the closed container and enter the pipeline in the liquid discharging process, certain resistance is caused to the gas, the measuring accuracy of the micro-flow gas is directly influenced, the pipeline is blocked due to long-term operation, and the measurement is difficult to continue; the measuring range is limited by the volume of the container and the height of the liquid level, and the measuring requirements of different gases with large volume difference cannot be met; in addition, the device needs to recover the liquid levels of the two containers after single measurement, so that subsequent measurement can be carried out, and the measurement time is prolonged.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a device for continuously measuring gas, which has simple structure and convenient operation; the measuring passage can be automatically switched, the continuous and accumulated measurement of the gas can be carried out, and the efficiency is high; the gas with more impurities and small flow can be measured, and the applicability is strong.
In order to achieve the above purpose, the utility model adopts the following specific technical scheme:
a device for continuously measuring gas comprises a first closed container, a second closed container, a gas inlet pipeline, a liquid discharge pipe and a gas outlet pipeline, wherein the gas inlet pipeline comprises a first gas inlet pipe connected to the first closed container, a second gas inlet pipe connected to the second closed container and a main gas inlet pipe; the first air inlet pipe and the second air inlet pipe are communicated with the main air inlet pipe through a first three-way valve; the liquid discharge pipe is connected with the first closed container and the second closed container and is used for transferring liquid discharged by the pressure of the gas to be detected in the first closed container/the second closed container to the second closed container/the first closed container; the air outlet pipeline comprises a first air outlet pipe connected to the first closed container, a second air outlet pipe connected to the second closed container and a main air outlet pipe, and the first air outlet pipe/the second air outlet pipe is used for releasing air discharged by the second closed container/the first closed container due to receiving of transferred liquid; the first air outlet pipe and the second air outlet pipe are communicated with the main air outlet pipe through a second three-way valve; the first air inlet pipe, the liquid discharge pipe and the second air outlet pipe form a first measuring passage; the second air inlet pipe, the liquid discharge pipe and the first air outlet pipe form a second measuring passage; and obtaining the flow and the flow speed of the gas to be detected by combining the transfer time through the weight change or the liquid level change of the first closed container or the second closed container in the liquid transfer process.
Preferably, the liquid discharge pipe comprises a forward liquid discharge pipe and a reverse liquid discharge pipe, a liquid outlet at the bottom of the first closed container is connected with a liquid inlet at the top of the second closed container through the forward liquid discharge pipe, and a liquid outlet at the bottom of the second closed container is connected with a liquid inlet at the top of the first closed container through the reverse liquid discharge pipe; and the forward liquid discharge pipe/the reverse liquid discharge pipe is provided with a first stop valve/a second stop valve.
Preferably, the system further comprises a liquid level detector or a liquid level switch, which is used for detecting and feeding back the liquid levels in the first closed container and the second closed container, and switching the measuring passage when the liquid levels are lower than a set value.
Furthermore, the liquid level detector or the liquid level switch is connected with the controller, and the controller controls the opening and closing of the valve according to the received liquid level information, so that the switching of the measurement access is realized, and the total gas volume and the real-time flow rate of the gas to be measured are obtained in an accumulated mode through software integrated control.
Preferably, the liquid contained in the first closed container or the second closed container is insoluble in the gas to be measured.
Preferably, the side surfaces of the first closed container and the second closed container are provided with scales or/and the bottom is provided with a weighing part.
Preferably, a filtering assembly is arranged in the first closed container and the second closed container and used for intercepting and collecting solid impurities in the gas to be detected.
The device for continuously measuring gas of the utility model leads the gas to be measured into a closed container, the closed container is filled with liquid which is not dissolved with the gas to be measured, the liquid is discharged into another closed container after being extruded, and the flow velocity of the gas are obtained by calculating through measuring the liquid level change or the weight change of the closed container; the device is provided with two measuring channels, can infinitely switch, need not be limited by the container range, and the measurement can be carried out continuously. Specifically, the two closed containers are respectively connected with an air inlet pipe and an air outlet pipe, the air inlet pipes of the two closed containers are communicated with a main air inlet pipe through a three-way valve, the air outlet pipes of the two closed containers are communicated with the main air outlet pipe through another three-way valve, and a liquid discharge pipe is arranged between the two closed containers; introducing gas to be measured into a first closed container filled with liquid, introducing the liquid into a second closed container under pressure through a liquid discharge pipe, and discharging the extruded air from an air outlet pipe of the second closed container, wherein the air is a first measurement passage; when all liquid enters the second closed container, changing the valve direction of a three-way valve on the air inlet pipeline and the air outlet pipeline and the flow direction of a liquid discharge pipe, so that the gas to be measured is introduced into the second closed container, the liquid enters the first closed container under the pressure through the liquid discharge pipe, the extruded air is discharged through the air outlet pipe of the first closed container, and the second measurement passage is communicated; when all the liquid enters the first closed container, the liquid is switched to the first measuring passage, and the continuous measurement of the gas flow is realized by the circulation. The gas with large volume flow can be cumulatively measured by switching the measuring passage without being limited by the volume of the container, and the application range is wide; compared with single-channel measurement, liquid level recovery is not needed, a pressure balance channel is not needed, measurement connection time of different gases is short, and the method is fast and efficient.
The utility model transmits the liquid level change in the closed container to the controller in real time through the liquid level detector or the liquid level switch, on one hand, the flow and the flow speed of the gas to be measured are calculated according to the liquid level change, and the total gas quantity can be accumulated, on the other hand, when the liquid level is monitored to reach the lower limit, the valve direction of the three-way valve is changed, the gas path and the water path direction are adjusted, and the measuring path is automatically switched in time; small liquid level change can be monitored to liquid level detector or liquid level switch, and sensitivity is high, and controller response speed is fast, compares in flowmeter commonly used, the utility model discloses the less gas of measurable quantity flow, the precision is high. In addition, the gas flow and the flow speed can be obtained through the weight change obtained by the weighing component, and when the closed container is simultaneously provided with the liquid level detector/the liquid level switch or the weighing component, the measurement accuracy can be confirmed through the data comparison obtained by the two components, and the problem can be found in time. To the more gas measurement of impurity content, mechanical damage, the dead scheduling problem of part card take place easily for the flowmeter commonly used, the utility model discloses because flow area is big, simple structure, the part is not fragile, and the operation receives the influence not big, but if long-term operation, impurity can be piled up in container bottom and fluid-discharge tube, influences the gas flow rate and detects. In order to avoid the problem, the utility model can be provided with two positive and negative liquid discharge pipes corresponding to the two measuring channels, when one liquid discharge pipe is accumulated with impurities, the measuring channel is switched, and the other liquid discharge pipe is used, thus ensuring that the current measurement is not influenced; more optimized, at the inside filter assembly that sets up of two airtight containers, to the gas measurement that impurity is many and the flow is little, can avoid impurity to pile up in the container bottom or get into the flowing back pipeline, improve measuring accuracy, and filter assembly is quick detachable, and impurity can obtain timely thorough clearance, does not influence the follow-up operation of device.
The utility model has the advantages as follows:
the device for continuously measuring the gas comprises two closed containers, an air inlet pipeline, a liquid discharge pipe and an air outlet pipeline, the measuring passage can be switched by switching the valve direction of a three-way valve, the structure is simple, and the operation is convenient; the two measuring channels can be infinitely switched, so that the measurement is continuously carried out, the gas with large volume flow can be measured in an accumulated manner without being limited by the range of the container, and the applicability is strong; the measurement of different gases is short in connection time, fast and efficient. The controller receives the liquid level change information and switches the measurement channel in time, and calculates the flow and the flow velocity of the gas to be measured, so that the response speed is high, and the measurement precision is high. Aiming at the gas with small gas flow and more impurities, the influence of impurities is reduced and the measurement accuracy is improved by arranging the forward and reverse liquid discharge pipes and the filtering component.
Drawings
FIG. 1: the utility model discloses embodiment 1's schematic structure diagram.
FIG. 2: the utility model discloses embodiment 2's structural schematic.
In the figure: 1-a first closed container, 2-a second closed container, 3-a first three-way valve, 4-a second three-way valve, 5-a first stop valve, 6-a second stop valve, 7-a two-way drain pipe, 31-a first air inlet pipe, 32-a second air inlet pipe, 33-a main air inlet pipe, 41-a first air outlet pipe, 42-a second air outlet pipe, 43-a main air outlet pipe, 51-a forward drain pipe and 61-a reverse drain pipe.
Detailed Description
The present invention will be further described with reference to the following specific embodiments.
Example 1
A device for continuously measuring gas comprises a first closed container 1, a second closed container 2, a gas inlet pipeline, a liquid discharge pipe and a gas outlet pipeline, wherein the gas inlet pipeline comprises a first gas inlet pipe 31 connected to the first closed container 1, a second gas inlet pipe 32 connected to the second closed container 2 and a main gas inlet pipe 33, and the first gas inlet pipe 31/the second gas inlet pipe 32 are used for introducing gas to be measured to a region above a liquid level in the first closed container 1/the second closed container 2; the first intake pipe 31 and the second intake pipe 32 communicate with a main intake pipe 33 through a first three-way valve 3. The liquid discharge pipe comprises a forward liquid discharge pipe 51 and a reverse liquid discharge pipe 61, a liquid outlet at the bottom of the first closed container 1 is connected with a liquid inlet at the top of the second closed container 2 through the forward liquid discharge pipe 51, and a liquid outlet at the bottom of the second closed container 2 is connected with a liquid inlet at the top of the first closed container 1 through the reverse liquid discharge pipe 61; the forward liquid discharge pipe 51 is provided with a first stop valve 5, and the reverse liquid discharge pipe 61 is provided with a second stop valve 6. The gas outlet pipeline comprises a first gas outlet pipe 41 connected to the top of the first closed container 1, a second gas outlet pipe 42 connected to the top of the second closed container and a main gas outlet pipe, and the first gas outlet pipe 41 and the second gas outlet pipe 42 are communicated with the main gas outlet pipe 43 through a second three-way valve 4. The first air inlet pipe 31, the forward liquid discharge pipe 51 and the second air outlet pipe 42 form a first measuring passage; the second inlet pipe 32, the reverse drain pipe 61 and the first outlet pipe 41 form a second measuring passage. The device for continuously measuring the gas further comprises a liquid level detector or a liquid level switch, wherein the liquid level detector or the liquid level switch is used for detecting and feeding back the liquid levels in the first closed container 1 and the second closed container 2, and when the liquid levels are lower than a set value, the measurement access is switched. The liquid level detector or the liquid level switch is connected with the controller, and the controller adjusts the opening and closing of the stop valve and the valve direction of the three-way valve according to the received liquid level information, so that the switching of the measuring passage is realized, and the total gas volume and the real-time flow rate of the gas to be measured are obtained in an accumulated mode through software integrated control. Scales are arranged on the side surfaces of the first closed container 1 and the second closed container 2, and a weighing part is arranged at the bottom of the first closed container 1 and the second closed container 2 and used for detecting the liquid level change and the weight change of the first closed container 1 and the second closed container 2.
The device has the following specific working procedures:
the gas to be measured is hydrogen, the first closed container 1 is filled with water, the second closed container 2 is kept empty, the first three-way valve 3 is left open, the second three-way valve 4 is right open, the first stop valve 5 is opened, the second stop valve 6 is closed, and at the moment, the first measurement passage formed by the first air inlet pipe 31, the forward liquid discharge pipe 51 and the second air outlet pipe 42 is communicated. The main gas pipe 33 is used for gas inlet, gas enters the upper part of the liquid level in the first closed container 1 through the first gas inlet pipe 31, water in the first closed container 1 is extruded by the gas and then is discharged to the second closed container 2 from the forward liquid discharge pipe 51 connected with the bottom, and the gas in the second closed container 2 enters the main gas outlet pipe 43 through the second gas outlet pipe 42 and is discharged. The whole device can collect and record the total volume of the gas to be measured in the first closed container 1, and can calculate the gas flow rate in a certain period of time. The gas flow rate calculation formula is as follows:
v = Δ V/Δ t or V = Δ m/Δ t
v- -flow velocity
Δ t- -a certain period of time that needs to be recorded
Δ V- -difference in volume of gas collected over a certain period of time
Δ m- -weight difference of tank drainage in a certain period of time
(the gas volume difference is calculated from the liquid level scale change and the cross-sectional area of the container, and the weight difference of the discharged water is recorded by a weighing part at the bottom of the container)
After a period of time, the water in the first closed container 1 enters the second closed container 2, the liquid level detector or the liquid level switch transmits liquid level information to the controller, the controller automatically switches the first three-way valve 3 to be a right open circuit, the second three-way valve 4 is a left open circuit, the first stop valve 5 is closed, the second stop valve 6 is opened, and at the moment, the second air inlet pipe 32, the reverse liquid discharge pipe 61 and the second measurement passage formed by the first air outlet pipe 41 are communicated. The main gas pipe 33 is used for gas inlet, the gas enters the upper part of the liquid level in the second closed container 2 through the second gas inlet pipe 32, water in the second closed container 2 is extruded by the gas and then is discharged to the first closed container 1 from the reverse liquid discharge pipe 61 connected with the bottom, and the gas in the first closed container 1 enters the main gas outlet pipe 43 through the first gas outlet pipe 41 and is discharged. The process can realize the measurement of the gas flow to be measured entering the second closed container 2, and the subsequent infinite switching can be carried out, thereby ensuring the continuous measurement.
Example 2
A device for continuously measuring gas is shown in figure 2, the basic structure of the device is the same as that of the device in the embodiment 1, the difference is that a liquid discharge pipe is only provided with a two-way liquid discharge pipe 7, pipe orifices at two ends of the two-way liquid discharge pipe 7 extend into the first closed container 1 and the second closed container 2 below the liquid level, and the specific extending depth can be adjusted according to the volume flow. When gas to be measured enters the first closed container 1, the water extruded by the first closed container 1 under pressure is transferred to the second closed container 2 through the bidirectional liquid discharge pipe 7 until the pipe orifice is leveled with the liquid level to reach the upper limit of single-channel detection, then the measurement channel is switched by changing the valve direction of the first three-way valve 3 and the valve direction of the second three-way valve 4, the gas to be measured enters the second closed container 2, the water extruded by the second closed container 2 under pressure is transferred to the first closed container 1 through the bidirectional liquid discharge pipe 7 until the pipe orifice is leveled with the liquid level, the switching of the measurement channel is carried out again, the process is circulated, and the measurement is continuously carried out. The switching mode of the three-way valve, the gas flow rate and the flow rate calculation method are the same as those in embodiment 1.
Example 3
The device structure and the work flow are the same as those of embodiment 1, and the difference lies in that the first closed container 1 and the second closed container 2 are internally provided with a filtering component for intercepting and collecting solid impurities in the gas to be detected, so that the device is suitable for the gas to be detected with more impurities and small flow. When the device operates, impurities are intercepted in the filtering components of the first closed container 1 and the second closed container 2, so that the impurities cannot be accumulated at the bottom of the container or enter a liquid drainage pipeline to influence the accuracy of measurement, and the operation safety of the device is improved. In addition, the filtering component can be detached, and is convenient to clean.
Example 4
The device structure and the working flow are the same as those of the embodiment 1, and the difference is that the gas to be detected is carbon dioxide, and the first closed container or the second closed container is filled with acetone.
This detailed description is to be construed as illustrative only and not limiting, and any changes that may be made by a person skilled in the art after reading the present disclosure are intended to be protected by the patent laws within the scope of the appended claims.
Claims (7)
1. The utility model provides a last gaseous device of surveying, includes first airtight container, second airtight container, air inlet pipe way, fluid-discharge tube and gas outlet pipe way, its characterized in that:
the air inlet pipeline comprises a first air inlet pipe connected to the first closed container, a second air inlet pipe connected to the second closed container and a main air inlet pipe, and the first air inlet pipe/the second air inlet pipe is used for introducing gas to be detected to an area above the liquid level in the first closed container/the second closed container; the first air inlet pipe and the second air inlet pipe are communicated with the main air inlet pipe through a first three-way valve;
the liquid discharge pipe is connected with the first closed container and the second closed container and is used for transferring liquid discharged by the pressure of the gas to be detected in the first closed container/the second closed container to the second closed container/the first closed container;
the air outlet pipeline comprises a first air outlet pipe connected to the first closed container, a second air outlet pipe connected to the second closed container and a main air outlet pipe, and the first air outlet pipe/the second air outlet pipe is used for releasing air discharged by the second closed container/the first closed container due to receiving of transferred liquid; the first air outlet pipe and the second air outlet pipe are communicated with the main air outlet pipe through a second three-way valve;
the first air inlet pipe, the liquid discharge pipe and the second air outlet pipe form a first measuring passage; the second air inlet pipe, the liquid discharge pipe and the first air outlet pipe form a second measuring passage;
and obtaining the flow and the flow speed of the gas to be detected by combining the transfer time through the weight change or the liquid level change of the first closed container or the second closed container in the liquid transfer process.
2. A device for continuously measuring gas as claimed in claim 1, wherein: the liquid discharge pipe comprises a forward liquid discharge pipe and a reverse liquid discharge pipe, a liquid outlet at the bottom of the first closed container is connected with a liquid inlet at the top of the second closed container through the forward liquid discharge pipe, and a liquid outlet at the bottom of the second closed container is connected with a liquid inlet at the top of the first closed container through the reverse liquid discharge pipe; and the forward liquid discharge pipe/the reverse liquid discharge pipe is provided with a first stop valve/a second stop valve.
3. A device for continuously measuring gas as claimed in claim 1, wherein: the liquid level detector or the liquid level switch is used for detecting and feeding back the liquid levels in the first closed container and the second closed container, and when the liquid levels are lower than a set value, the measurement access is switched.
4. A device for continuously measuring gas according to claim 3, wherein: the liquid level detector or the liquid level switch is connected with the controller, the controller controls the opening and closing of the valve according to the received liquid level information, so that the switching of the measurement access is realized, and the total gas volume and the real-time flow rate of the gas to be measured are obtained in an accumulated mode through software integrated control.
5. A device for continuously measuring gas as claimed in claim 1, wherein: the liquid contained in the first closed container or the second closed container is insoluble to the gas to be measured.
6. A device for continuously measuring gas as claimed in claim 1, wherein: scales are arranged on the side surfaces of the first closed container and the second closed container or/and a weighing part is arranged at the bottom of the first closed container and/or the second closed container.
7. A device for continuously measuring gas as claimed in claim 1, wherein: and filter assemblies are arranged in the first closed container and the second closed container and are used for intercepting and collecting solid impurities in the gas to be detected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921738915.7U CN211317384U (en) | 2019-10-17 | 2019-10-17 | Device for continuously measuring gas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921738915.7U CN211317384U (en) | 2019-10-17 | 2019-10-17 | Device for continuously measuring gas |
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| CN211317384U true CN211317384U (en) | 2020-08-21 |
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| CN201921738915.7U Active CN211317384U (en) | 2019-10-17 | 2019-10-17 | Device for continuously measuring gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465700A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | System and method for measuring melt level in container |
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2019
- 2019-10-17 CN CN201921738915.7U patent/CN211317384U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465700A (en) * | 2021-06-21 | 2021-10-01 | 中国原子能科学研究院 | System and method for measuring melt level in container |
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