CN210154894U - Rock sample high temperature water smoke saturation device - Google Patents
Rock sample high temperature water smoke saturation device Download PDFInfo
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- CN210154894U CN210154894U CN201920800270.9U CN201920800270U CN210154894U CN 210154894 U CN210154894 U CN 210154894U CN 201920800270 U CN201920800270 U CN 201920800270U CN 210154894 U CN210154894 U CN 210154894U
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Abstract
The utility model discloses a rock sample high-temperature water mist saturation device, which comprises a high-temperature water mist supply system, a high-pressure gas supply system, a steam mixing and pressurizing cylinder, a sample loading barrel, a lifting base and a bracket; the sample loading barrel is coaxially arranged at the top of the lifting base, and a plurality of sample grooves are distributed in the sample loading barrel; the steam mixing and pressurizing cylinder is coaxially arranged above the sample loading barrel, and the bottom of the steam mixing and pressurizing cylinder is hermetically and detachably connected with the top of the sample loading barrel; the high-temperature water mist supply system supplies high-temperature water mist into the water vapor mixed pressurization cylinder, and the high-pressure gas supply system supplies high-pressure air into the high-pressure gas supply system. The method has the advantages that the disturbance to the microstructure of the rock sample is small while the test period is shortened, special maintenance is not needed, and the method is particularly suitable for the field of preparation of high-temperature high-ground-stress HTM coupling field saturated water samples.
Description
Technical Field
The utility model relates to a rock mechanics, seepage flow mechanics interdisciplinary field, especially a rock sample high temperature water smoke saturation device.
Background
Rock mass is used as a recombination part of rock-soil mass and is an important research object in the field of rock-soil mechanics. Along with the construction of the deep-buried radioactive high-temperature tunnel in China at present, rock mass seepage mechanics under complex conditions becomes a hotspot of research, particularly, the measurement of the permeability coefficient of high-strength compact rock and the rock seepage characteristic under the condition of multi-field coupling (THM) such as temperature-stress-seepage become problems of wide research of scholars at home and abroad.
However, the problem of water saturation of rock samples before the test still has a great treatment problem, the permeability of dense rock is extremely low, for example, granite is taken as an example, the permeability coefficient of the granite is 2e-8 to 5e-11 by referring to the embankment engineering handbook compiled by the famous people Yonghe, so that complete water saturation of the sample is difficult to achieve by adopting a soaking method and a vacuum permeation method of a conventional seepage test, the measurement of the water content of the rock and the measurement of the permeability coefficient of the seepage test can be greatly influenced, and the later-period heating maintenance are time-consuming.
In order to solve the problems, the chinese patent publication No. CN 106568622 a discloses a "test apparatus for positive pressure water saturation of a high-strength rock sample and a use method thereof", which uses high-pressure water flow to realize water saturation of the rock sample, and although the water saturation time of the rock is greatly shortened, the following disadvantages exist:
1. by adopting a high-pressure water flow water saturation method, the essence of water saturation of the rock sample is that high-pressure fracture water penetrates through the whole rock sample, and the method can ensure that micro cracks in the rock sample penetrate into a seepage channel. When the permeability coefficient of the sample saturated with water is measured by adopting the method, the permeability coefficient is more enlarged than that of the original sample, and an error exists.
2. The sample preparation method has less samples prepared each time, and can not complete batch preparation of the samples.
3. The water content of the prepared sample cannot be directly measured, further measurement is needed, and the automation degree of the instrument is low.
4. The temperature is controlled within 100 ℃, and the preparation requirement of the high-temperature rock sample cannot be met.
Therefore, the rock sample water saturation device and the test method which have small disturbance to the microstructure of the rock sample and high automation become problems to be solved in the field of rock seepage.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to above-mentioned prior art, and provide a rock sample high temperature water smoke saturation device, this rock sample high temperature water smoke saturation device is when can shortening test cycle, and is little to rock sample microstructure disturbance, and does not need maintenance very much.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a rock sample high-temperature water mist saturation device comprises a high-temperature water mist supply system, a high-pressure gas supply system, a water vapor mixing pressurizing cylinder, a sample loading barrel, a lifting base and a support.
The height of lifting base can go up and down, and dress appearance bucket coaxial arrangement is equipped with a plurality of sample groove at lifting base top in the dress appearance bucket, and the sample groove is used for the installation to treat the saturated sample.
The steam mixing and pressurizing cylinder is coaxially arranged above the sample loading barrel and is fixedly connected with the bracket.
The bottom of the steam mixing pressurizing cylinder can be hermetically and detachably connected with the top of the sample loading barrel.
The center of the bottom of the water vapor mixing pressurizing cylinder is provided with a mixed water vapor injection port and an injection valve for controlling the opening and closing of the mixed water vapor injection port.
The water vapor mixing pressurizing cylinder is also respectively connected with the high-temperature water mist supply system and the high-pressure gas supply system; the high-temperature water mist supply system supplies high-temperature water mist into the water vapor mixed pressurization cylinder, and the high-pressure gas supply system supplies high-pressure air into the high-pressure gas supply system.
The lifting base is provided with a water outlet which is communicated with a plurality of sample grooves.
The lifting base comprises a bearing platform and a hydraulic lifting platform arranged at the bottom of the bearing platform, the hydraulic lifting platform controls the lifting of the bearing platform, and the water outlet is arranged on the bearing platform.
Treat that saturation sample periphery or top are provided with sealed watertight fittings, sealed watertight fittings can be used to seal the clearance of treating between saturation sample and the sample groove.
The sealing waterproof device is a water blocking gasket, the water blocking gasket is arranged at the top of the sample to be saturated, the outer diameter of the water blocking gasket is not smaller than the inner diameter of the sample groove, and the middle of the water blocking gasket is provided with a plurality of water leakage holes.
And a water blocking gasket is also arranged at the bottom of the sample to be saturated, and a through hole communicated with the corresponding sample groove and the water outlet is formed in the water blocking gasket positioned at the bottom.
The periphery of the to-be-saturated sample, the water blocking gasket positioned at the bottom and the water blocking gasket positioned at the top is wrapped with a heat shrinkable sleeve.
The water leakage holes are located in the water leakage area, the water blocking gasket positioned on the periphery of the water leakage area is provided with an annular groove, and a rubber gasket is nested in the annular groove.
The high-temperature water mist supply system is a water vapor generator, and the model of the water vapor generator is HSG-AM.
Every treat all nestedly in the saturation sample has the temperature humidity response piece, and the temperature humidity response piece is used for detecting the temperature and the humidity value of treating the saturation sample correspondingly.
The utility model discloses following beneficial effect has:
can avoid full water process to the disturbance of the inside mesoscopic structure of fine and close rock to the at utmost, possess fine full water effect simultaneously, can prepare full water rock sample under the specific temperature, overcome the drawback of traditional high pressure water head pressurization method, this experimental apparatus is simple easily to be operated, excellent in use effect easily promotes.
Drawings
Fig. 1 shows the structure schematic diagram of the high-temperature water mist saturation device for the rock sample.
FIG. 2 shows a schematic diagram of a rock sample high temperature water mist saturation apparatus without a support frame and a support shaft.
Fig. 3 shows a schematic view of the construction of the loading bucket.
FIG. 4 shows a schematic view of the installation of a sample to be saturated with a water-blocking gasket.
FIG. 5 shows a cross-sectional view of a rock sample high temperature water mist saturation apparatus without a support bracket and support shaft.
Among them are:
1. a steam mixing and pressurizing cylinder; 2. a support shaft; 3. a hygrothermograph; 4. a support; 5. loading a sample barrel; 6. a lifting base; 7. an insufflating valve control key; 8. a water mist inlet valve; 9. a high pressure air inlet valve; 10. a flange plate; 11. a bolt; 12. a bearing platform; 13. a hydraulic lifting platform; 14. a sample tank; 15. filling a sample barrel wall; 16. a water blocking gasket; 17. a rubber gasket; 18. a water leakage hole; 19. a temperature and humidity sensing sheet; 20. a sample to be saturated; 21. an injection valve; 22. a mixing chamber; 23. a computer; 24. and a water outlet.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.
As shown in fig. 1 and 2, the high-temperature water mist saturation device for the rock sample comprises a high-temperature water mist supply system, a high-pressure gas supply system, a water vapor mixing pressurizing cylinder 1, a sample loading barrel 5, a lifting base 6 and a support 4.
The water vapor mixing and pressurizing cylinder is preferably fixedly connected with the top of the bracket through a support shaft 2.
As shown in fig. 5, the top of the water vapor mixing and pressurizing cylinder is preferably provided with a water mist inlet valve 8 and a high pressure air inlet valve 9. Wherein, the water mist inlet valve is connected with a high-temperature water mist supply system, and the high-pressure air inlet valve is connected with a high-pressure gas supply system through a connecting line.
Both the mist inlet valve and the high pressure air inlet valve are preferably controlled by a computer 23.
The high-temperature water mist supply system provides high-temperature water mist to the mixing cavity 22 of the water vapor mixing and pressurizing cylinder, is preferably a water vapor generator, is preferably an HSG-AM model, is provided with devices such as water shortage automatic water replenishing and overtemperature protection, and can provide water vapor with specific temperature and specific water content according to requirements.
The high pressure gas supply system is preferably an oil pressure high power pressurizer which can provide a maximum oil pressure of 20MP, i.e. high pressure air to the mixing chamber 22 of the water vapor mixing pressurizing cylinder.
The bottom of the water vapor mixing and pressurizing cylinder is preferably connected with the top of the sample loading barrel in a sealing and detachable mode through a flange plate 10 and a bolt 11.
The center of the bottom of the water vapor mixing pressurizing cylinder is provided with a mixed water vapor injection port and an injection valve 21 for controlling the opening and closing of the mixed water vapor injection port.
The top of the water vapor mixed pressurization cylinder is preferably provided with an injection valve control key 7 and a hygrothermograph 3. The control of the opening and closing of the injection valve is realized by pressing the injection valve control key 7. The thermo-hygrometer 3 is used to detect the temperature and humidity of the environment.
The pressure measuring device is preferably arranged in the water vapor mixing and pressurizing cylinder, the pressure measuring device is preferably a pressure sensor, and the high-pressure mixed water vapor with fixed water content and fixed pressure is obtained by adjusting the high-temperature water mist quantity and the high-pressure air pressure.
A plurality of sample grooves 14 are distributed in the sample containing barrel and used for installing samples to be saturated. As shown in fig. 3, the number of the sample wells is 5, and the sample wells are specifically arranged as needed, so that a large number of samples can be prepared each time, that is, a small lot of samples can be prepared.
Each sample groove in the sample barrel is slightly larger than a sample to be saturated in size, the diameter is preferably 52mm, and the height is preferably 120mm
In the present application, the diameter of the sample 20 to be saturated is preferably 50mm, and the height is preferably 100 mm. The sample to be saturated is a cylindrical compact rock sample.
As shown in fig. 4, both the top and bottom of the sample to be saturated are preferably provided with water-tight seals, preferably water-blocking gaskets 16. The thickness of each water-blocking shim is preferably 10 mm. The outer diameter of the water blocking gasket is not smaller than the inner diameter of the sample groove.
The water blocking gasket positioned at the top can be used for sealing a gap between a sample to be saturated and the sample groove. The middle of the water blocking gasket right above the sample to be saturated is provided with a plurality of water leakage holes 18, the area where the plurality of water leakage holes are located forms a water leakage area, the water blocking gasket on the periphery of the water leakage area is provided with an annular groove, and a rubber gasket 17 is nested in the annular groove.
The water-blocking gasket at the bottom is provided with a through hole communicated with the corresponding sample groove, and the diameter of the through hole is preferably smaller than the inner diameter of the sample groove, so that the infiltration speed of water vapor can be reduced.
The peripheries of the sample to be saturated, the water blocking gasket positioned at the bottom and the water blocking gasket positioned at the top are preferably coated with heat shrinkable sleeves. Due to the arrangement of the thermal shrinkage sleeve, on one hand, the sample to be saturated can be conveniently taken; on the other hand, water vapor can be prevented from permeating into the gap between the sample to be saturated and the inner wall of the sample tank through the outer wall of the sample to be saturated.
As shown in fig. 5, each sample to be saturated is preferably nested with a temperature and humidity sensing piece 19. The specific preferred setting method comprises the following steps: and forming an opening with the same size as the temperature and humidity sensing piece on the sample heat-shrinkable tube, and then embedding the temperature and humidity sensing piece in the opening and tightly attaching the temperature and humidity sensing piece to the outer side wall surface of the sample to be saturated.
The lifting base is coaxially arranged at the bottom of the sample loading barrel, and the bottom of the sample loading barrel is detachably connected with the lifting base.
The lifting base can be lifted and lowered in height and preferably comprises a bearing platform 12 and a hydraulic lifting platform 13 arranged at the bottom of the bearing platform, and the hydraulic lifting platform controls the lifting of the bearing platform. The hydraulic lifting platform is preferably connected with a computer, and has the highest lifting quota, so that the instrument is prevented from being damaged.
The platform is preferably provided with a drain port 24 which communicates with the plurality of sample wells and the through-hole. The water outlet is arranged to discharge the gas passing through the sample to be saturated.
As shown in fig. 5, under the condition that the injection valve 21 is closed, the high-temperature water mist and the high-pressure air are uniformly mixed in the mixing cavity 22 of the water-vapor mixing and pressurizing cylinder to reach a predetermined pressure, the injection valve is opened, and the high-temperature water vapor passes through the sample 20 to be saturated in the sample barrel and is saturated; the temperature and humidity sensing piece 19 monitors the temperature and the moisture content change condition of the sample to be saturated in real time, and after the sample reaches the expected temperature and the stable moisture content, the injection valve is closed through the computer 23, the bearing platform at the bottom is descended, the sample is taken out, and the sample saturation is completed.
When in use, the following steps are preferably adopted:
1. firstly, respectively installing water blocking gaskets at the upper end and the lower end of a sample to be saturated (the diameter is 50mm, and the height is 120 mm); and then wrapping a heat shrinkable sleeve on the outer surface of the to-be-saturated sample provided with the water blocking gasket, and tightly wrapping the to-be-saturated sample by using a hot air gun to shrink the heat shrinkable sleeve. And then, forming a hole on the heat shrinkable sleeve, and nesting a temperature and humidity sensing piece on the outer wall surface of the sample to be saturated.
2. And (4) lowering the bearing platform, filling the sample to be saturated into the sample groove, lifting the bearing platform to reach a preset position, and finishing the sample filling process of the sample.
3. Closing the injection valve to seal the steam mixing pressurizing cylinder, opening the high-temperature water mist supply system, the high-pressure gas supply system, the high-temperature water mist inlet valve and the high-pressure air inlet valve, and pressurizing the steam mixing pressurizing cylinder until the pressure of the steam reaches a fixed pressure.
4. And opening an injection valve to perform the water saturation process of the sample. The time for the sample to be saturated with high pressure steam depends on the degree of densification of the sample and the pressure of the high pressure steam.
In this application, adopt high pressure steam to carry out full water to the rock sample, it is little to rock sample microstructure disturbance. In addition, the high-pressure steam has a set temperature, so that the rock sample is heated to expand after entering the rock sample, thereby accelerating water saturation and shortening the test period; meanwhile, the rock sample does not need to be specially maintained.
In general, the test device can complete the water saturation of the sample within 2 hours under the pressure of 2MP air corresponding to granite.
In this application, the moisture content of sample can directly be surveyed with temperature humidity response piece, also can verify through the sample quality difference before and after the humidification simultaneously, and both calculate that the humidity difference is less than 1% and regard as full water to accomplish.
The above detailed description describes the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be within the scope of the present invention to perform various equivalent transformations, which all belong to the protection scope of the present invention.
Claims (10)
1. The utility model provides a rock sample high temperature water smoke saturation device which characterized in that: comprises a high-temperature water mist supply system, a high-pressure gas supply system, a water vapor mixing pressurizing cylinder, a sample loading barrel, a lifting base and a bracket;
the height of the lifting base can be lifted, the sample containing barrel is coaxially arranged at the top of the lifting base, and a plurality of sample grooves are distributed in the sample containing barrel and used for installing samples to be saturated;
the steam mixing and pressurizing cylinder is coaxially arranged above the sample loading barrel and is fixedly connected with the bracket;
the bottom of the steam mixing pressurizing cylinder can be hermetically and detachably connected with the top of the sample loading barrel;
the center of the bottom of the water vapor mixed pressurizing cylinder is provided with a mixed water vapor injection port and an injection valve for controlling the opening and closing of the mixed water vapor injection port;
the water vapor mixing pressurizing cylinder is also respectively connected with the high-temperature water mist supply system and the high-pressure gas supply system; the high-temperature water mist supply system supplies high-temperature water mist into the water vapor mixed pressurization cylinder, and the high-pressure gas supply system supplies high-pressure air into the high-pressure gas supply system.
2. The high temperature water mist saturation device for rock samples according to claim 1, wherein: the lifting base is provided with a water outlet which is communicated with a plurality of sample grooves.
3. The high temperature water mist saturation device for rock samples according to claim 2, wherein: the lifting base comprises a bearing platform and a hydraulic lifting platform arranged at the bottom of the bearing platform, the hydraulic lifting platform controls the lifting of the bearing platform, and the water outlet is arranged on the bearing platform.
4. A rock sample high temperature water mist saturation apparatus according to claim 3, wherein: treat that saturation sample periphery or top are provided with sealed watertight fittings, sealed watertight fittings can be used to seal the clearance of treating between saturation sample and the sample groove.
5. The device of claim 4, wherein: the sealing waterproof device is a water blocking gasket, the water blocking gasket is arranged at the top of the sample to be saturated, the outer diameter of the water blocking gasket is not smaller than the inner diameter of the sample groove, and the middle of the water blocking gasket is provided with a plurality of water leakage holes.
6. The device of claim 5, wherein: and a water blocking gasket is also arranged at the bottom of the sample to be saturated, and a through hole communicated with the corresponding sample groove and the water outlet is formed in the water blocking gasket positioned at the bottom.
7. The device of claim 6, wherein: the periphery of the to-be-saturated sample, the water blocking gasket positioned at the bottom and the water blocking gasket positioned at the top is wrapped with a heat shrinkable sleeve.
8. The device of claim 5, wherein: the water leakage holes are located in the water leakage area, the water blocking gasket positioned on the periphery of the water leakage area is provided with an annular groove, and a rubber gasket is nested in the annular groove.
9. The high temperature water mist saturation device for rock samples according to claim 1, wherein: the high-temperature water mist supply system is a water vapor generator, and the model of the water vapor generator is HSG-AM.
10. The high temperature water mist saturation device for rock samples according to claim 1, wherein: every treat all nestedly in the saturation sample has the temperature humidity response piece, and the temperature humidity response piece is used for detecting the temperature and the humidity value of treating the saturation sample correspondingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920800270.9U CN210154894U (en) | 2019-05-30 | 2019-05-30 | Rock sample high temperature water smoke saturation device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920800270.9U CN210154894U (en) | 2019-05-30 | 2019-05-30 | Rock sample high temperature water smoke saturation device |
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| CN210154894U true CN210154894U (en) | 2020-03-17 |
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| CN201920800270.9U Active CN210154894U (en) | 2019-05-30 | 2019-05-30 | Rock sample high temperature water smoke saturation device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116358969A (en) * | 2023-06-02 | 2023-06-30 | 中国地质大学（北京） | Rock sample preparation device with different water contents |
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2019
- 2019-05-30 CN CN201920800270.9U patent/CN210154894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116358969A (en) * | 2023-06-02 | 2023-06-30 | 中国地质大学（北京） | Rock sample preparation device with different water contents |
| CN116358969B (en) * | 2023-06-02 | 2023-08-08 | 中国地质大学（北京） | Rock sample preparation device with different water contents |
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