CN108195873A - A kind of visualization coal sample tank and its application method under high pressure low temperature environment - Google Patents
A kind of visualization coal sample tank and its application method under high pressure low temperature environment Download PDFInfo
- Publication number
- CN108195873A CN108195873A CN201711436429.5A CN201711436429A CN108195873A CN 108195873 A CN108195873 A CN 108195873A CN 201711436429 A CN201711436429 A CN 201711436429A CN 108195873 A CN108195873 A CN 108195873A
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- Prior art keywords
- tank body
- limit channels
- camera
- hydraulic cylinder
- coal sample
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
Abstract
The invention discloses a kind of visualization coal sample tanks under high pressure low temperature environment,Including accommodating tank body,Four the 4th hydraulic cylinders vertically set are symmetrically fixed on the tank diameter lateral wall of the upper end for accommodating tank body,The telescopic rod end of four the 4th hydraulic cylinders is fixedly connected with a sealing cover,The upper end for accommodating tank body is provided with the coal sample dispensing port being adapted with the sealing cover,The upper portion side wall for accommodating tank body is symmetrically arranged with the first connection valve and the second connection valve,The first limit channels have been placed equidistant with successively from top to bottom on the side wall for accommodating tank body,Second limit channels and third limit channels,The described one end for accommodating tank body that extends to of first limit channels is provided with the first convex lens,The described one end for accommodating tank body that extends to of second limit channels is provided with the second convex lens,The described one end for accommodating tank body that extends to of the third limit channels is provided with third convex lens.
Description
Technical field
The present invention relates to coal sample tank technical field, specially a kind of visualization coal sample tank under high pressure low temperature environment and
Its application method.
Background technology
The Gas Outburst as caused by coal-bed gas and explosion are to endanger one of source of safety of coal mines, with mining depth
Increase, the environmental effect of gas becomes increasingly complex, characterization of adsorption and its water of the research gas in coal body under various environmental effects
The formation characteristic of object is closed, the clean and effective of gas problem and gas to solution Safety of Coal Mine Production, which utilizes, very important meaning
Justice.Temperature drops to less than -161.5 DEG C and can liquefy under methane gas normal pressure, if increasing pressure to 4.59MPa, temperature drop
It to -82.6 DEG C, can also liquefy, therefore in the research of high pressure low temperature is carried out to methane gas, if pressure and temperature reaches gas
The transformation temperature of body, if it can intuitively observe that gas is become the dynamic process of liquid phase or solid phase by gas phase, and gas is grasped to us
The generation research of the phase transition temperature and pressure of gas and relevant gas absorption and Gas Hydrate has very big side
It helps, entire research process needs are used for the visualization coal sample tank under high pressure low temperature environment.
But the visualization coal sample tank under current high pressure low temperature environment, still remain limit installation to sealing cover not
It is convenient, to the detection observing effect of coal sample difference and using it is inconvenient prompt the problem of.
Invention content
The purpose of the present invention is to provide a kind of visualization coal sample tank and its application method under high pressure low temperature environment,
To solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical solution：A kind of visualization under high pressure low temperature environment
Coal sample tank, including accommodating tank body, the lower end bottom surface for accommodating tank body is provided with the supporting leg being used to support, the receiving tank body
Upper end tank diameter lateral wall on be symmetrically fixed with four the 4th hydraulic cylinders vertically set, four the 4th hydraulic pressure
The telescopic rod end of cylinder is fixedly connected with a sealing cover, and the upper end for accommodating tank body is provided with the coal being adapted with the sealing cover
Sample dispensing port, the upper portion side wall for accommodating tank body are symmetrically arranged with the first connection valve and the second connection valve, first connection
First connector on valve is installed, the second connector is installed in second connection valve, on the side wall for accommodating tank body from
Top to bottm has been placed equidistant with the first limit channels, the second limit channels and third limit channels successively, and first limiting is logical
The one end for accommodating tank body that extends in road is provided with the first convex lens, and the other ends of first limit channels is welded with the
One lateral frame, is welded with the first perpendicular support on first lateral frame, first perpendicular support with first limit channels
Horizontally disposed first hydraulic cylinder is fixed on opposite side wall, the telescopic rod end of the first hydraulic cylinder is fixed with
First camera, the described one end for accommodating tank body that extends to of second limit channels are provided with the second convex lens, and described the
The other end of two limit channels is welded with the second lateral frame, is welded with the second perpendicular support on second lateral frame, and described second
It is fixed with horizontally disposed second hydraulic cylinder on the side wall opposite with second limit channels of perpendicular support, described
The telescopic rod end of two hydraulic cylinders is fixed with second camera, and extending to for the third limit channels described accommodates the one of tank body
End is provided with third convex lens, and the other ends of the third limit channels is welded with third lateral frame, on the third lateral frame
Third perpendicular support is welded with, is fixed on the side wall opposite with the third limit channels of the third perpendicular support along level side
To the third hydraulic cylinder of setting, the telescopic rod end of the third hydraulic cylinder is fixed with third camera.
Preferably, the rubber washer for sealing is provided between the coal sample dispensing port and the sealing cover.
Preferably, first limit channels are arranged on the top for accommodating tank body, the second limit channels setting
At the middle part for accommodating tank body, the third limit channels are arranged on the lower part for accommodating tank body.
Preferably, first camera is adopted as end, second camera are adopted as end, third camera are adopted as end point
It is not directed at setting one by one with corresponding first convex lens, the second convex lens, third convex lens.
Preferably, the first hydraulic cylinder, second hydraulic cylinder, third hydraulic cylinder and the 4th hydraulic cylinder are respectively by defeated
Oil pipe line connects a hydraulic station.
Preferably, first camera, second camera and third camera pass through one meter of data line connection respectively
Calculation machine, first connector are connected with pressure sensor, and second connector is connected with temperature sensor.
A kind of application method of visualization coal sample tank under high pressure low temperature environment, includes the following steps：
S1, coal sample is launched by coal sample dispensing port to accommodating in tank body first, passes through the 4th hydraulic cylinder of hydraulic pressure stand control
It shrinks, automatically by the tightly compacted coal sample dispensing port of sealing cover；
S2 then the first connector position be connected with pressure sensor and the second connector position be connected with temperature pass
Sensor, pressure sensor therein are connected to computer by data line with temperature sensor, pressure are shown by computer
With the real-time change of temperature；
S3, corresponding first is driven finally by hydraulic pressure stand control first hydraulic cylinder, second hydraulic cylinder, third hydraulic cylinder
Camera, second camera, the extension of third camera, and through corresponding first convex lens, the second convex lens, third convex lens
Mirror is imaging shooting, and picture concerned and image data are recorded in computer.
Compared with prior art, advantageous effect of the invention is：This for the visualization coal sample tank under high pressure low temperature environment and
Its application method, by accommodate tank body upper end tank diameter lateral wall on symmetrically fix four vertically set the 4th
Hydraulic cylinder, the telescopic rod end of four the 4th hydraulic cylinders are fixedly connected with a sealing cover, accommodate upper end setting and the sealing cover of tank body
Adaptable coal sample dispensing port is shunk by the 4th hydraulic cylinder of hydraulic pressure stand control, automatically launches the tightly compacted coal sample of sealing cover
Mouthful so that it is convenient to the limit installation of sealing cover, it is time saving and energy saving；By equidistant successively from top to bottom on the side wall for accommodating tank body
First limit channels, the second limit channels and third limit channels are set, and the first limit channels, the second limit channels,
The first camera, second camera, third camera for Image Acquisition are correspondingly arranged in third limit channels, is realized to holding
Upper, middle, and lower part of the sample coal under high pressure low temperature environment in tank body of receiving is carried out at the same time camera shooting information collection, and correlation is schemed
Piece and image data are recorded in computer so that preferable to the detection observing effect of coal sample；This is used under high pressure low temperature environment
Visualization coal sample tank application method, first by coal sample by coal sample dispensing port launch to accommodate tank body in, pass through hydraulic station
The 4th hydraulic cylinder is controlled to shrink, automatically by the tightly compacted coal sample dispensing port of sealing cover；Then it is connected with pressure in the first connector position
Force snesor and temperature sensor is connected in the second connector position, pressure sensor therein passes through with temperature sensor
Data line is connected to computer, and the real-time change of pressure and temperature is shown by computer；Finally by hydraulic pressure stand control
One hydraulic cylinder, second hydraulic cylinder, third hydraulic cylinder drive corresponding first camera, second camera, third camera to prolong
Stretch, and be imaging shooting through corresponding first convex lens, the second convex lens, third convex lens, and by picture concerned and
Image data is recorded in computer, and this method is relatively simple, convenient for staff's operation and control.
Description of the drawings
Fig. 1 is a kind of structure diagram of the visualization coal sample tank under high pressure low temperature environment；
Fig. 2 is a kind of coal sample dispensing port, sealing cover, the 4th hydraulic pressure of the visualization coal sample tank under high pressure low temperature environment
The combining structure schematic diagram of cylinder and rubber washer；
In figure：1- accommodates tank body；2- supporting legs；3- coal sample dispensing ports；4- sealing covers；The first connection valves of 5-；6- second connects
Connect valve；The first connectors of 7-；The second connectors of 8-；The 4th hydraulic cylinders of 9-；The first limit channels of 10-；The second limit channels of 11-；
12- third limit channels；The first convex lenses of 13-；The second convex lenses of 14-；15- third convex lenses；The first cameras of 16-；17-
Two cameras；18- third cameras；The first lateral frames of 19-；The second lateral frames of 20-；21- third lateral frames；The perpendicular branch of 22- first
Frame；The second perpendicular supports of 23-；24- third perpendicular supports；25- first hydraulic cylinders；26- second hydraulic cylinders；27- third hydraulic cylinders；28-
Rubber washer.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
It please refers to Fig.1 and Fig. 2, the present invention provides a kind of technical solution：A kind of visualization under high pressure low temperature environment
Coal sample tank, including accommodating tank body 1, the lower end bottom surface for accommodating tank body 1 is provided with the supporting leg 2 being used to support, the receiving
It is symmetrically fixed with four the 4th hydraulic cylinders 9 vertically set on the tank diameter lateral wall of the upper end of tank body 1, four described
The telescopic rod end of four hydraulic cylinders 9 is fixedly connected with a sealing cover 4, and the upper end for accommodating tank body 1 is provided with and the sealing cover 4
Adaptable coal sample dispensing port 3, the upper portion side wall for accommodating tank body 1 are symmetrically arranged with the first connection valve 5 and the second connection valve
6, the first connector 7 is installed in first connection valve 5, the second connector 8 is installed in second connection valve 6, it is described
It accommodates and has been placed equidistant with the first limit channels 10, the second limit channels 11 and third successively from top to bottom on the side wall of tank body 1
Limit channels 12, the described one end for accommodating tank body 1 that extends to of first limit channels 10 are provided with the first convex lens 13, institute
The other end for stating the first limit channels 10 is welded with the first lateral frame 19, and the first perpendicular support is welded on first lateral frame 19
22, horizontally disposed is fixed on the side wall opposite with first limit channels 10 of first perpendicular support 22
One hydraulic cylinder 25, the telescopic rod end of the first hydraulic cylinder 25 are fixed with the first camera 16, second limit channels 11
The described one end for accommodating tank body 1 that extends to be provided with the second convex lens 14, the other end welding of second limit channels 11
Have the second lateral frame 20, be welded with the second perpendicular support 23 on second lateral frame 20, second perpendicular support 23 with it is described
Horizontally disposed second hydraulic cylinder 26, the second hydraulic cylinder 26 are fixed on the opposite side wall of second limit channels 11
Telescopic rod end be fixed with second camera 17, the third limit channels 12 extend to described one end for accommodating tank body 1
Third convex lens 15 is provided with, the other end of the third limit channels 12 is welded with third lateral frame 21, the horizontal branch of third
Third perpendicular support 24 is welded on frame 21, is consolidated on the side wall opposite with the third limit channels 12 of the third perpendicular support 24
Surely there is horizontally disposed third hydraulic cylinder 27, the telescopic rod end of the third hydraulic cylinder 27 is fixed with third camera
18。
The rubber washer 28 for sealing is provided between the coal sample dispensing port 3 and the sealing cover 4.
First limit channels 10 are arranged on the top for accommodating tank body 1, and second limit channels 11 are arranged on
The middle part for accommodating tank body 1, the third limit channels 12 are arranged on the lower part for accommodating tank body 1.
First camera 16 is adopted as end, second camera 17 are adopted as end, third camera 18 are adopted as end point
It is not directed at setting one by one with corresponding first convex lens 13, the second convex lens 14, third convex lens 15.
The first hydraulic cylinder 25, second hydraulic cylinder 26,27 and the 4th hydraulic cylinder 9 of third hydraulic cylinder are respectively by defeated
Oil pipe line connects a hydraulic station.
First camera 16, second camera 17 and third camera 18 are calculated respectively by data line connection one
Machine, first connector 7 are connected with pressure sensor, and second connector 8 is connected with temperature sensor.
A kind of application method of visualization coal sample tank under high pressure low temperature environment, includes the following steps：
S1, coal sample is launched by coal sample dispensing port 3 in receiving tank body 1 first, passes through the 4th hydraulic pressure of hydraulic pressure stand control
Cylinder 9 is shunk, automatically by 4 tightly compacted coal sample dispensing port 3 of sealing cover；
S2 and then pressure sensor is connected at the first connector 7 and is connected with temperature at the second connector 8
Sensor, pressure sensor therein are connected to computer with temperature sensor by data line, and pressure is shown by computer
The real-time change of power and temperature；
S3, driven finally by hydraulic pressure stand control first hydraulic cylinder 25, second hydraulic cylinder 26, third hydraulic cylinder 27 it is corresponding
The first camera 16, second camera 17, third camera 18 extend, and penetrate corresponding first convex lens 13, second
Convex lens 14, third convex lens 15 are imaging shooting, and picture concerned and image data are recorded in computer.
Operation principle：This is for the visualization coal sample tank and its application method under high pressure low temperature environment, by accommodating tank
Four the 4th hydraulic cylinders 9 vertically set, four the 4th hydraulic cylinders are symmetrically fixed on the tank diameter lateral wall of the upper end of body 1
9 telescopic rod end is fixedly connected with a sealing cover 4, accommodates the coal sample dispensing port that the upper end setting of tank body 1 is adapted with sealing cover 4
3, it is shunk by the 4th hydraulic cylinder 9 of hydraulic pressure stand control, automatically by 4 tightly compacted coal sample dispensing port 3 of sealing cover so as to sealing cover
Limit installation it is convenient, it is time saving and energy saving；Led to by being placed equidistant with the first limiting successively from top to bottom on the side wall for accommodating tank body 1
Road 10, the second limit channels 11 and third limit channels 12, and the first limit channels 10, the second limit channels 11, third
The first camera 16, second camera 17, the third camera 18 for Image Acquisition are correspondingly arranged in limit channels 12, is realized
Camera shooting information collection is carried out at the same time, and will to accommodating upper, middle, and lower part of the sample coal in tank body 1 under high pressure low temperature environment
Picture concerned and image data are recorded in computer so that preferable to the detection observing effect of coal sample；This is used for high pressure low temperature
Coal sample by coal sample dispensing port 3 is launched accommodate in tank body 1 first, led to by the application method of the visualization coal sample tank under environment
It crosses the 4th hydraulic cylinder 9 of hydraulic pressure stand control to shrink, automatically by 4 tightly compacted coal sample dispensing port 3 of sealing cover；Then in the first connector
Pressure sensor is connected at 7 and temperature sensor is connected at the second connector 8, pressure sensor therein and temperature
Degree sensor is connected to computer by data line, and the real-time change of pressure and temperature is shown by computer；Finally by
Hydraulic pressure stand control first hydraulic cylinder 25, second hydraulic cylinder 26, third hydraulic cylinder 27 drive corresponding first camera 16, second
Camera 17, third camera 18 extend, and through corresponding first convex lens 13, the second convex lens 14, third convex lens
15 are imaging shooting, and picture concerned and image data are recorded in computer, and this method is relatively simple, convenient for work people
Member's operation and control.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (7)
1. a kind of visualization coal sample tank under high pressure low temperature environment, it is characterised in that：Including accommodating tank body (1), the appearance
Receiving the lower end bottom surface of tank body (1) is provided with the supporting leg (2) being used to support, on the outside of the tank diameter of the upper end for accommodating tank body (1)
Four the 4th hydraulic cylinders (9) vertically set, the telescopic rod of four the 4th hydraulic cylinders (9) are symmetrically fixed on wall
End is fixedly connected with a sealing cover (4), and the upper end for accommodating tank body (1) is provided with the coal being adapted with the sealing cover (4)
Sample dispensing port (3), the upper portion side wall for accommodating tank body (1) are symmetrically arranged with the first connection valve (5) and the second connection valve (6),
First connector (7) on first connection valve (5) is installed, the second connector is installed on second connection valve (6)
(8), the first limit channels (10) have been placed equidistant on the side wall for accommodating tank body (1) successively from top to bottom, the second limiting is led to
Road (11) and third limit channels (12), one end for extending to the receiving tank body (1) of first limit channels (10)
It is provided with the first convex lens (13), the other ends of first limit channels (10) is welded with the first lateral frame (19), and described
Be welded with the first perpendicular support (22) on one lateral frame (19), first perpendicular support (22) with first limit channels (10)
Horizontally disposed first hydraulic cylinder (25), the flexible rod end of the first hydraulic cylinder (25) are fixed on opposite side wall
Portion is fixed with the first camera (16), one end setting for extending to the receiving tank body (1) of second limit channels (11)
There is the second convex lens (14), the other end of second limit channels (11) is welded with the second lateral frame (20), and described second is horizontal
Be welded with the second perpendicular support (23) on stent (20), second perpendicular support (23) it is opposite with second limit channels (11)
Side wall on be fixed with horizontally disposed second hydraulic cylinder (26), the telescopic rod end of the second hydraulic cylinder (26) is consolidated
Surely there is a second camera (17), one end for extending to the receiving tank body (1) of the third limit channels (12) is provided with the
Three convex lenses (15), the other end of the third limit channels (12) are welded with third lateral frame (21), the third lateral frame
(21) third perpendicular support (24), the side opposite with the third limit channels (12) of the third perpendicular support (24) are welded on
Horizontally disposed third hydraulic cylinder (27) is fixed on wall, the telescopic rod end of the third hydraulic cylinder (27) is fixed with
Third camera (18).
2. a kind of visualization coal sample tank under high pressure low temperature environment as described in claim 1, it is characterised in that：The coal
The rubber washer (28) for sealing is provided between sample dispensing port (3) and the sealing cover (4).
3. a kind of visualization coal sample tank under high pressure low temperature environment as described in claim 1, it is characterised in that：Described
One limit channels (10) are arranged on the top of the receiving tank body (1), and second limit channels (11) are arranged on the receiving
The middle part of tank body (1), the third limit channels (12) are arranged on the lower part of the receiving tank body (1).
4. a kind of visualization coal sample tank under high pressure low temperature environment as described in claim 1, it is characterised in that：Described
One camera (16) adopt as end, second camera (17) adopt as end, third camera (18) adopt as end respectively with accordingly
The first convex lens (13), the second convex lens (14), third convex lens (15) be directed at setting one by one.
5. a kind of visualization coal sample tank under high pressure low temperature environment as described in claim 1, it is characterised in that：Described
One hydraulic cylinder (25), second hydraulic cylinder (26), third hydraulic cylinder (27) and the 4th hydraulic cylinder (9) respectively pass through pipeline road
Connect a hydraulic station.
6. a kind of visualization coal sample tank under high pressure low temperature environment as described in claim 1, it is characterised in that：Described
One camera (16), second camera (17) and third camera (18) connect a computer by data line respectively, described
First connector (7) is connected with pressure sensor, and second connector (8) is connected with temperature sensor.
7. a kind of application method of visualization coal sample tank under high pressure low temperature environment, it is characterised in that：Include the following steps：
S1, coal sample is launched by coal sample dispensing port (3) to accommodating in tank body (1) first, passes through the 4th hydraulic pressure of hydraulic pressure stand control
Cylinder (9) is shunk, automatically by the tightly compacted coal sample dispensing port (3) of sealing cover (4)；
S2 and then pressure sensor is connected at the first connector (7) and is connected with temperature at the second connector (8)
Sensor, pressure sensor therein are connected to computer with temperature sensor by data line, and pressure is shown by computer
The real-time change of power and temperature；
S3, it is driven relatively finally by hydraulic pressure stand control first hydraulic cylinder (25), second hydraulic cylinder (26), third hydraulic cylinder (27)
The first camera (16), second camera (17), the third camera (18) answered extend, and penetrate corresponding first convex lens
(13), the second convex lens (14), third convex lens (15) are imaging shooting, and picture concerned and image data are recorded in meter
In calculation machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436429.5A CN108195873A (en) | 2017-12-26 | 2017-12-26 | A kind of visualization coal sample tank and its application method under high pressure low temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711436429.5A CN108195873A (en) | 2017-12-26 | 2017-12-26 | A kind of visualization coal sample tank and its application method under high pressure low temperature environment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108195873A true CN108195873A (en) | 2018-06-22 |
Family
ID=62584381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711436429.5A Pending CN108195873A (en) | 2017-12-26 | 2017-12-26 | A kind of visualization coal sample tank and its application method under high pressure low temperature environment |
Country Status (1)
| Country | Link |
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| CN (1) | CN108195873A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104502397A (en) * | 2014-12-31 | 2015-04-08 | 河南理工大学 | Visual coal sample tank used in high-pressure low-temperature environment and using method thereof |
| US20160230521A1 (en) * | 2013-07-11 | 2016-08-11 | Korea Gas Corporation | Experiment apparatus for estimating ground deformation during gas hydrate recovery |
| CN107364867A (en) * | 2016-05-09 | 2017-11-21 | 刘菁菁 | A kind of multifunctional C SiClx purification reaction device |
| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN107487560A (en) * | 2017-09-30 | 2017-12-19 | 江阴市南丰科技有限公司 | A kind of pharmaceutical purpose decoction storage tank |
-
2017
- 2017-12-26 CN CN201711436429.5A patent/CN108195873A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160230521A1 (en) * | 2013-07-11 | 2016-08-11 | Korea Gas Corporation | Experiment apparatus for estimating ground deformation during gas hydrate recovery |
| CN104502397A (en) * | 2014-12-31 | 2015-04-08 | 河南理工大学 | Visual coal sample tank used in high-pressure low-temperature environment and using method thereof |
| CN107364867A (en) * | 2016-05-09 | 2017-11-21 | 刘菁菁 | A kind of multifunctional C SiClx purification reaction device |
| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN107487560A (en) * | 2017-09-30 | 2017-12-19 | 江阴市南丰科技有限公司 | A kind of pharmaceutical purpose decoction storage tank |
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Application publication date: 20180622 |