CN110608975A - Gas content testing device and testing method and application thereof - Google Patents
Gas content testing device and testing method and application thereof Download PDFInfo
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- CN110608975A CN110608975A CN201910898363.4A CN201910898363A CN110608975A CN 110608975 A CN110608975 A CN 110608975A CN 201910898363 A CN201910898363 A CN 201910898363A CN 110608975 A CN110608975 A CN 110608975A
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- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 90
- 238000003795 desorption Methods 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N7/00—Analysing materials by measuring the pressure or volume of a gas or vapour
- G01N7/14—Analysing materials by measuring the pressure or volume of a gas or vapour by allowing the material to emit a gas or vapour, e.g. water vapour, and measuring a pressure or volume difference
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- Health & Medical Sciences (AREA)
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a gas content testing device and a testing method and application thereof. The invention relates to a gas content testing device, which comprises a single-action cylinder, a pressure sensor and a driving device, wherein the single-action cylinder is arranged on the single-action cylinder; the pressure chamber of the single-action cylinder is provided with an air inlet and an air outlet which are communicated with the interior of the single-action cylinder, the air inlet and the air outlet are respectively provided with a valve for opening or closing the air inlet, the air inlet is communicated with an air source through an air inlet pipe, a pressure sensor is arranged in the pressure chamber and used for detecting the internal pressure of the pressure chamber, and a driving device is in transmission connection with a piston rod of the single-action cylinder so as to drive the piston rod to move along the cylinder. The testing device provided by the invention does not need other liquid media such as water, the pressure balance of the air inlet end and the air outlet end can be ensured in real time by controlling the movement of the piston rod of the air cylinder through the motor, and the testing result is simple and clear. The testing method is direct and reliable, high in feasibility, high in metering precision, good in stability and low in testing cost.
Description
Technical Field
The invention relates to the technical field of gas testing, in particular to a gas content testing device and a testing method and application thereof.
Background
At present, the volume measurement of many gases mostly adopts one or a combination of a drainage method in the volumetric method principle and a pVT method principle to carry out effective quantity value transmission. However, for some gases that are very soluble in water or under the difficult conditions of the test environment, it is difficult to accurately detect the gas amount of the gas to be detected.
Disclosure of Invention
The present invention is directed to a gas content testing apparatus, a testing method and an application thereof, which are directed to the above-mentioned shortcomings of the prior art.
The invention relates to a gas content testing device, which comprises a single-action cylinder, a pressure sensor and a driving device, wherein the single-action cylinder is arranged on the single-action cylinder; the pressure chamber of the single-action cylinder is provided with an air inlet and an air outlet which are communicated with the interior of the single-action cylinder, the air inlet and the air outlet are respectively provided with a valve for opening or closing the air inlet, the air inlet is communicated with an air source through an air inlet pipe, the pressure sensor is arranged in the pressure chamber and used for detecting the internal pressure of the pressure chamber, and the driving device is in transmission connection with the piston rod of the single-action cylinder so as to drive the piston rod to move along the cylinder barrel of the single-action cylinder.
Preferably, the driving device comprises a rolling screw and a motor, one end of the piston rod is fixedly connected with a nut seat of the rolling screw, and the motor is in transmission connection with the screw rod to drive the screw rod to rotate so as to drive the piston rod to move along a cylinder barrel of the single-action cylinder.
Preferably, the valves are all solenoid valves.
Preferably, the air inlet and the air outlet are an outlet, the valve is a two-position three-way valve, one port of the two-position three-way valve is communicated with the inside of the pressure chamber, one port is the air inlet and is communicated with the air source, and the remaining one port is the air outlet and is communicated with the outside.
Preferably, the two-position three-way valve is an electromagnetic valve.
Preferably, the pressure sensor is electrically connected with the valve, and the motor is electrically connected with the valve.
A shale desorption gas content testing device comprises a desorption gas separating device and the gas content testing device, wherein a desorption gas outlet of the desorption gas separating device is communicated with a gas inlet through a hose.
A gas content testing method uses the gas content testing device and comprises the following specific steps:
s1: the cross section area of the cylinder barrel is known as S, and the initial position L of the piston rod is recorded1The pressure sensor detects an initial pressure P in the pressure chamber1；
S2: opening the air inlet, inflating the pressure chamber for a period of time T by the air source, closing the air inlet, driving the piston rod to move towards the direction far away from the bottom of the cylinder barrel by the driving device, and detecting the pressure P in the pressure chamber by the pressure sensor2＝P1Recording the piston rod position L at this time2Then the gas outlet is opened to discharge the gas, the driving device drives the piston rod to return to the original position, and the gas outlet is closed, so that the air inflow V of the gas source in the time T is S x (L)2-L1)；
S3: and opening the air inlet again, and repeating the step S2 to measure the amount of all unknown gases.
The gas content testing device provided by the invention does not need water and other liquid media, the pressure balance of the gas inlet end and the gas outlet end can be ensured in real time by controlling the movement of the piston rod of the cylinder through the motor, and the testing result is simple and clear. The testing method is direct and reliable, high in feasibility, high in metering precision, good in stability and low in testing cost.
Drawings
FIG. 1 is a schematic structural diagram of a gas content testing apparatus according to the present invention;
fig. 2 is a shale desorption gas content testing device of the invention.
1-single-acting cylinder; 11-a pressure chamber; 12-an air inlet; 13-air outlet; 14-an air inlet pipe; 15-a piston rod; 16-a cylinder barrel; 2-a pressure sensor; 3-a drive device; 31-a motor; 32-ball screw; 321-a nut seat; 322-a screw mandrel; 4-a valve; 5-a controller; 6-desorption gas separation device.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, the gas content testing device of the present invention comprises a single-acting cylinder 1, a pressure sensor 2 and a driving device 3; the pressure chamber 11 of the single-acting cylinder 1 is provided with an air inlet 12 and an air outlet 13 which are communicated with the inside of the single-acting cylinder 1, the air inlet 12 and the air outlet 13 are respectively provided with a valve 4 for opening or closing the air inlet 12 and the air outlet 13, the air inlet 12 is communicated with an air source through an air inlet pipe 14, the pressure sensor 2 is arranged in the pressure chamber 11 and used for detecting the internal pressure of the pressure sensor, and the driving device 3 is in transmission connection with a piston rod 15 of the single-acting cylinder 1 so as to drive the piston rod 15 to.
The gas content testing device does not need water and other liquid media, the pressure balance of the gas inlet end and the gas outlet end can be ensured in real time by controlling the movement of the cylinder piston rod 15 through the motor 31, and the testing result is simple and clear.
The structure of the driving device 3 is various, and is not limited herein, in this embodiment, the driving device 3 may include a ball screw 32 and a motor 31, one end of the piston rod 15 is fixedly connected to the nut seat 321 of the ball screw 32, the motor 31 is in transmission connection with the screw 322 of the ball screw 32, and the screw 322 is driven to rotate to drive the piston rod 15 to move along the cylinder 16 of the single-acting cylinder 1.
In an implementation manner, the air inlet 12 and the air outlet 13 may be two ports, and the valves 4 on the air inlet 12 and the air outlet 13 may be electromagnetic valves.
In another practical way, the gas inlet 12 and the gas outlet 13 may be one outlet, the valve 4 is a two-position three-way valve, one port of the two-position three-way valve is communicated with the inside of the pressure chamber 11, one port is the gas inlet 12 and is communicated with the gas source, and the other port is the gas outlet 13 and is communicated with the outside. The two-position three-way valve may be a solenoid valve.
A controller 5 may also be included, the controller 5 being electrically connected to the pressure sensor 2, the valve 4 and the motor 31, respectively. In the case of the controller 5, the specific process of measuring the gas is:
s1: transverse to the cylinder barrel 16The cross-sectional area is known as S, and the initial position L of the piston rod 15 is recorded1The pressure sensor 2 detects the initial pressure P in the pressure chamber 111；
S2: the controller 5 controls a port of the two-position three-way valve, which is the air inlet 12, to be opened, the air source inflates the pressure chamber 11 for a period of time T, the controller 5 controls a port of the two-position three-way valve, which is the air inlet 12, to be closed, then the driving device 3 is controlled to drive the piston rod 15 to move towards the direction far away from the bottom of the cylinder 16 until the pressure sensor 2 detects the pressure P in the pressure chamber 112＝P1The position L of the piston rod 15 at this time is recorded2The controller 5 controls the two-position three-way valve to open one port of the air outlet 13 to discharge air, the driving device 3 drives the piston rod 15 to return to the original position, the air outlet 13 is closed, and the air inflow V of the air source in the time T is equal to S x (L)2-L1)；
S3: the controller 5 controls one port of the two-position three-way valve for the gas inlet 12 to open again, and repeats step S2, so that the gas amount of all unknown gases can be measured.
The shale gas consists of three parts of desorbed gas, residual gas and lost gas, wherein the desorbed gas quantity is directly obtained by using a desorbed gas content testing device and carrying out a desorption test on a field core sample, so that a method and device capable of accurately testing the shale desorbed gas are required to be provided for effectively evaluating the shale reserves in a certain area and accurately testing the shale gas content.
As shown in fig. 2, a shale desorption gas content testing device may include a desorption gas separation device 6 and the gas content testing device, and a desorption gas outlet of the desorption gas separation device 6 is communicated with the gas inlet 12 through a hose. The stripping gas of stripping gas separation device 6 is the gas source of the gas content testing device.
A gas content testing method uses the gas content testing device and comprises the following specific steps:
s1: the cross-sectional area of the cylinder 16 is known as S, and the initial position L of the piston rod 15 is recorded1The pressure sensor 2 detects the initial pressure P in the pressure chamber 111；
S2: openThe air inlet 12 is filled with air to the pressure chamber 11 for a period of time T, the air inlet 12 is closed, then the driving device 3 drives the piston rod 15 to move towards the direction far away from the bottom of the cylinder 16 until the pressure sensor 2 detects the pressure P in the pressure chamber 112＝P1The position L of the piston rod 15 at this time is recorded2Then the gas outlet 13 is opened to discharge the gas, the driving device 3 drives the piston rod 15 to return to the original position, and the gas outlet 13 is closed, so that the air inflow V of the gas source is S × (L) within the time T2-L1)；
S3: the gas inlet 12 is opened again, and the step S2 is repeated, so that the amount of all unknown gases can be measured.
The above is not relevant and is applicable to the prior art.
While certain specific embodiments of the present invention have been described in detail by way of illustration, it will be understood by those skilled in the art that the foregoing is illustrative only and is not limiting of the scope of the invention, as various modifications or additions may be made to the specific embodiments described and substituted in a similar manner by those skilled in the art without departing from the scope of the invention as defined in the appending claims. It should be understood by those skilled in the art that any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. A gas content testing device is characterized in that: comprises a single-acting cylinder (1), a pressure sensor (2) and a driving device (3); the pressure chamber (11) of the single-acting cylinder (1) is provided with an air inlet (12) and an air outlet (13) which are communicated with the inside of the pressure chamber, the air inlet (12) and the air outlet (13) are respectively provided with a valve (4) for opening or closing the air inlet, the air inlet (12) is communicated with an air source through an air inlet pipe (14), the pressure sensor (2) is arranged in the pressure chamber (11) and used for detecting the internal pressure of the pressure chamber, and the driving device (3) is in transmission connection with a piston rod (15) of the single-acting cylinder (1) so as to drive the piston rod (15) to move along a cylinder barrel (16) of the single-acting cylinder (1).
2. A gas content testing device according to claim 1, wherein: the driving device (3) comprises a ball screw (32) and a motor (31), one end of the piston rod (15) is fixedly connected with a nut seat (321) of the ball screw (32), the motor (31) is in transmission connection with a screw rod (322) of the ball screw (32) and drives the screw rod (322) to rotate so as to drive the piston rod (15) to move along a cylinder barrel (16) of the single-action air cylinder (1).
3. A gas content testing device according to claim 2, wherein: the valves (4) are all electromagnetic valves.
4. A gas content testing device according to claim 2, wherein: air inlet (12) and gas outlet (13) are an export, valve (4) are two-position three-way valve, one opening of two-position three-way valve with pressure chamber (11) inside intercommunication, one opening is air inlet (12), and with the air supply intercommunication, remains one opening and is gas outlet (13), and communicates with each other with the outside.
5. A gas content testing device according to claim 4, wherein: the two-position three-way valve is an electromagnetic valve.
6. A gas content testing device according to claim 3 or 5, wherein: the device is characterized by further comprising a controller (5), wherein the controller (5) is electrically connected with the pressure sensor (2), the valve (4) and the motor (31) respectively.
7. The utility model provides a shale desorption gas content testing arrangement which characterized in that: comprising a stripping gas separation device (6) and a gas content testing device according to claims 1 to 4, the stripping gas outlet of the stripping gas separation device (6) being in communication with the gas inlet (12).
8. A gas content testing method is characterized in that: use of the gas content testing device according to claims 1-6, the specific steps are as follows:
s1: the cross-sectional area of the cylinder barrel (16) is known as S, and the initial position L of the piston rod (15) is recorded1The pressure sensor (2) detects an initial pressure P in the pressure chamber (11)1；
S2: the air inlet (12) is opened, the air source inflates the pressure chamber (11) for a period of time T, the air inlet (12) is closed, then the driving device (3) drives the piston rod (15) to move towards the direction far away from the bottom of the cylinder barrel (16), and the pressure sensor (2) detects the pressure P in the pressure chamber (11)2＝P1Recording the position L of the piston rod (15) at that time2Then the gas outlet (13) is opened to discharge the gas, the driving device (3) drives the piston rod (15) to return to the original position, and the gas outlet (13) is closed, so that the air inflow V of the gas source in the time T is S x (L)2-L1)；
S3: and opening the gas inlet (12) again, and repeating the step S2 to measure the gas quantity of all unknown gases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898363.4A CN110608975A (en) | 2019-09-23 | 2019-09-23 | Gas content testing device and testing method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898363.4A CN110608975A (en) | 2019-09-23 | 2019-09-23 | Gas content testing device and testing method and application thereof |
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| Publication Number | Publication Date |
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| CN110608975A true CN110608975A (en) | 2019-12-24 |
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| CN201910898363.4A Pending CN110608975A (en) | 2019-09-23 | 2019-09-23 | Gas content testing device and testing method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697641A (en) * | 2020-12-08 | 2021-04-23 | 武汉库仑特科技有限公司 | Reciprocating gas collection type shale desorption test analyzer |
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