CN209102652U - Data measurement unit in crack sample seepage flow-diabatic process - Google Patents
Data measurement unit in crack sample seepage flow-diabatic process Download PDFInfo
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- CN209102652U CN209102652U CN201821896833.0U CN201821896833U CN209102652U CN 209102652 U CN209102652 U CN 209102652U CN 201821896833 U CN201821896833 U CN 201821896833U CN 209102652 U CN209102652 U CN 209102652U
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Abstract
The utility model discloses the data measurement units in a kind of crack sample seepage flow-diabatic process, crack inlet water temperature Tin2 can be measured by the thermometric line in the sense channel of entrance vacation core during carrying out Single Fracture test specimen seepage flow-Experimental Study of Heat Transfer, crack can be surveyed along journey inner surface rock temperature Ti by exporting the thermometric line that the thermometric line in the sense channel of false core can measure crack exit water temperature Tout in real time, the thermometric line in through-hole can survey in crack in Cheng ShuiwenT f, counterbore；The variable quantity of crack width b can be accurately measured by the crack width measuring device of design, the probe of vertical fissure-plane is close to the outer surface of sample, eliminates the influence that gum cover deformation generates, eliminates measurement error significantly.The utility model is specifically designed clamper arrival end, temperature calibration is carried out in advance in arrival end, first relationship of the research clamper inlet water temperature and crack inlet water temperature under varying environment state, reaches standard design value so as to accurately control crack inlet water temperature.
Description
Technical field
The utility model relates to a kind of measuring device, the data in specifically a kind of crack sample seepage flow-diabatic process are surveyed
Device is measured, Mining Geothermics and heat evil prevention and control field are belonged to.
Background technique
It is exploited deeply as east China and part middle part enter, High-geotemperature mine is more and more common, follows for deep
Ring rises high heat anomaly mine caused by underground water, and geothermal energy resources carry out active utilization or passive prevention and treatment is new as Green Mine
Direction.It includes water in fracture network-thermophoresis characteristic research that the project, which needs the key scientific problems solved, wherein carrying out
Experimental Study of Heat Transfer research in Single Fracture rock sample flow event is element task.Rock sample can be fitted into hold assembly when research, it is right
Relevant parameter measures, and then obtains water in fracture network-thermophoresis characteristic with regularity summarization by calculating.
It finds in actual operation, water flow can lead to hold assembly obviously by the influence conducted heat after entering hold assembly
Inlet water temperature can be very different with the crack inlet water temperature for entering rock sample, in this case if simply with clamping part
Part inlet water temperature has very big error to represent crack inlet water temperature.In addition, currently for Single Fracture rock sample seepage flow
In the research of heat transfer problem in the process, rock sample internal temperature is all regarded substantially as black box, i.e., to crack along Cheng Shuiwen and crack edge
Journey inner surface rock temperature does not make a search, and there is also biggish errors for the measurement of the wide b of gap in crack.To sum up, since test becomes
The disunity of amount the rock interior temperature conditions such as does not know about and all will lead to heat transfer problem research in Single Fracture flow event not
Sufficiently, enough reference values can not actually be provided for production.
Summary of the invention
In view of the above-mentioned problems of the prior art, the purpose of the utility model is to provide one kind can accurately measure crack
Inlet water temperature, and can be in crack sample seepage flow-diabatic process that rock sample internal temperature and Crack change situation accurately understand
Data measurement unit.
In a kind of crack sample seepage flow-diabatic process that in order to achieve the above purposes, the technical solution adopted by the utility model is:
Data measurement unit, including clamper, the clamper include sleeve, and gum cover, sleeve are coaxially equipped in the sleeve
Confining pressure chamber is equipped between inner wall and gum cover outer wall, and sleeve is externally provided with confining pressure loading device；One entrance vacation core and an entrance are stifled
Head is successively filled in gum cover from the entrance side of clamper, and the entrance side of clamper is equipped with inlet cap, one export false core and
One outlet plug is successively filled in gum cover from the outlet side of clamper, and the false core of the entrance vacation core and outlet is along respective axis
Line is respectively equipped with water stream channel, and entrance vacation core and exporting respectively radially is sent out from center on false core side relative to each other
It has been casually arranged with multiple seepage tanks；
Two throughbores are equipped in the entrance plug with its axis parallel, a throughbore is connected by pipeline I
External water flood device is passed to, pipeline I is equipped with valve I and temperature sensor, and another throughbore is connected to by pipeline II
Outside, pipeline II are equipped with valve II；
The entrance vacation core exports false core, is equipped with Single Fracture sample in the cavity that gum cover surrounds, in Single Fracture sample
Be spaced apart along its length equipped with multiple instrument connection groups, the instrument connection group include one from Single Fracture sample outer wall along its diameter
The counterbore inwardly opened up to the through-hole for passing to fissure-plane and one from Single Fracture sample outer wall, the bottom of the counterbore is close to crack
Face；It is respectively radially extended by starting point of water stream channel equipped with sense channel, institute in the false core of the entrance vacation core and outlet
It states and is all equipped with thermometric line in each sense channel, through-hole and counterbore, the thermometric line all passes through the wiring groove being arranged in outlet plug
Common to draw clamper, the outlet plug center is axially arranged with water flow fairlead along it, and water flow fairlead exposes outlet plug
One end one water flow meter is connected to by outlet pipe, the outlet pipe is equipped with triple valve and counterbalance valve；Outside the sleeve
Portion is equipped with the wide measuring device of gap, and the probe vertical of the wide measuring device of gap passes through sleeve and gum cover in fissure-plane and withstands simple check
The outer wall of gap sample；
The temperature sensor, the end of thermometric line extraction clamper, the wide measuring device of gap, water flow meter connect jointly
To a data collector.
Preferably, the confining pressure loading device includes ring press pump and heating mantle, and the heating mantle covers on sleeve, on sleeve
Equipped with fuel feed hole and oil outlet, fuel feed hole and oil outlet all pass to cartridge exterior from confining pressure chamber；The outlet of the ring press pump connects
One pressure pipeline, the pressure pipeline pass through heating mantle and are connected on fuel feed hole, and a pressure relief pipeline, release are connected on oil outlet
Pipeline passes through heating mantle and passes in atmosphere, and the pressure pipeline is equipped with switch, and pressure relief pipeline is equipped with exhaust valve.Heating mantle
Can have temp sensing function, the temperature that can be heated to real-time measurement；Electric heating, heating with higher also can be used in heating mantle
Efficiency, first heating muff, heat can be inwardly transmitted to pressure oil, gum cover by sleeve and reach Single Fracture specimen surface.
Above-mentioned confining pressure loading device further includes a circulating pump, and one end of circulating pump is connected to pressure pipeline by circulating valve I
On, the pressure relief pipeline between oil outlet and exhaust valve be equipped with circulating valve II, the other end of circulating pump be connected to exhaust valve with
Relief tube section between circulating valve II.Circulating pump can be continuously circulated the pressure oil in confining pressure chamber, and heat transfer is avoided to cause
There is difference in the oil temperature of different location, and oil temperature is uniform everywhere for the pressure oil in guarantee confining pressure chamber；When circulating pump has heating function
Pressure oil can also be compensated in time because transferring heat to the heat of water flow loss, guarantee that Single Fracture sample hull-skin temperature is steady always
It is fixed.
Further, the side surrounding water stream channel for exporting false core towards outlet plug is equipped with an O-ring, and O-ring is set
It is exporting between false core and outlet plug, can be effectively prevented to be directly entered in wiring groove from the water that water stream channel flows out and damage
Thermometric line.
Preferably, the notch that wiring groove exposes clamper is equipped with pressure-resistant cushion, and the pressure resistance cushion is by three layers of cushion material
Material composition, respectively polyimides, polytetrafluoroethylene (PTFE), polyimide material, thermometric line pass through pressure-resistant cushion and draw clamper,
Pressure-resistant cushion has the characteristics that pressure resistance, can tightly fix thermometric line.
Preferably, the wide measuring device of gap includes LVDT displacement sensor, and probe and the LVDT displacement of the wide measuring table of gap pass
Sensor connection, can measure the vertical deformation amount △ b in sample crack, and LVDT displacement sensing according to the wide selection range of gap
Device is connected on data collector.
The thermal loss in crack is flowed into reduce water flow from clamper entrance, the inlet cap is designed as hollow knot
Structure, entrance plug use nonmetallic polyimide material, and entrance vacation core uses polytetrafluoroethylene material, using such material
Heat transfer efficiency is low, has further reduced the difference between the crack inlet water temperature in clamper inlet water temperature and clamper, also to the greatest extent
The temperature for potentially reducing clamper inlet port pressure oil influences the heat transfer of water flow.
Compared with the existing technology, the utility model has the advantage that
1. the utility model, which has fully taken into account water flow, enters after clamper the influence that will receive heat transfer, clamper enters saliva
Warm Tin1 can be very different with crack inlet water temperature Tin2, be specifically designed to clamper arrival end, in arrival end
Temperature calibration is carried out in advance, studies relationship of the Tin1 and Tin2 under varying environment state, first so as to accurately control crack
Inlet water temperature Tin2 reaches standard design value；And by the way that the inlet cap of clamper left end is carried out hollow processing, entrance plug
With entrance vacation core non-metal heat-insulating material, reduces influence of the radial heat transfer to water temperature as far as possible, reduce clamper and enter
The difference of mouth and crack inlet water temperature；
2. the utility model is arranged by unique thermometric line, during carrying out Single Fracture test specimen seepage flow-Experimental Study of Heat Transfer
Crack inlet water temperature Tin2 can be measured by the thermometric line in the sense channel of entrance vacation core, exports the sense channel of false core
In thermometric line can measure crack exit water temperature Tout in real time, the thermometric line in through-hole can survey in crack along Cheng ShuiwenT f, heavy
Thermometric line in hole can survey crack along journey inner surface rock temperature Ti；It can accurately be measured by the crack width measuring device of design
To the variable quantity of crack width b, the probe of vertical fissure-plane is close to the outer surface of sample, eliminates the shadow that gum cover deformation generates
It rings, compared to other designs, eliminates measurement error significantly；
3. utility model device is when measuring the interface Shui Yan convection transfer rate, variable associated therewith such as flow Q, rock
Stone hull-skin temperature T0, crack inlet water temperature Tin2, the wide b0 of the initial gap in crack, crack width deformation Δ b can be wanted by experimenter
Ask setting, it can along journey inner surface rock temperature Ti along Cheng ShuiwenT f, crack in the variable such as crack exit water temperature Tout, crack of test
Precise measurement.Compared to other similar Designs, the utility model control variable it is more accurate, the variable of measurement is more, for research h with
Quantitative relationship between different variables provides possibility.
Detailed description of the invention
Fig. 1 is the schematic diagram of the measuring device of the utility model；
Fig. 2 is the main view of each bore position in the clamper of the utility model；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the perspective view of the Single Fracture sample of the utility model；
Fig. 5 is the variable schematic diagram measured in the clamper of the utility model；
Fig. 6 is the signal for the side that the false core of entrance vacation core and outlet is relative to each other in the clamper of the utility model
Figure；
Fig. 7 is the side schematic view of the outlet false core direction outlet plug side of the utility model；
Fig. 8 is the side structure schematic diagram of the outlet plug of the utility model；
Fig. 9 is the schematic diagram of the confining pressure loading device of the utility model；
Diabatic process schematic diagram when Figure 10 is the utility model heating mantle heats clamper；
In figure, 9. sleeves；9-1. fuel feed hole；9-2. oil outlet；10. gum cover；11. entrance plug；12. entrance vacation core；
13. Single Fracture sample；13-1. through-hole；13-2. counterbore；13-3. fissure-plane；14. the wide measuring device of gap；14-1. probe；15. entering
Mouth end cap；16. ingress protection lid；17. wiring groove；17-1. pressure-resistant cushion；18. temperature sensor；19. counterbalance valve；20. positioning
Column；21. thermometric line；22. pressure sensor II；23. ring press pump；24. circulating pump；25. heating mantle；26. switch；27. circulating valve
Ⅰ；28. exhaust valve；29. circulating valve II；30. pressure sensor I；31. triple valve；33. pipeline I；33-1. valve I；32. pipeline
Ⅱ；32-1. valve II；34. exporting false core；35. exporting plug；35-1. water flow fairlead；36. exporting protection cap；37. seeping
Chute；38.O type circle；40. water stream channel；50. sense channel；60. water flow meter；70. data collector.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figures 1 to 9, the data measurement unit in a kind of crack sample seepage flow-diabatic process, including clamper,
The clamper includes sleeve 9, and gum cover 10 is coaxially equipped in the sleeve 9, is set between 10 outer wall of 9 inner wall of sleeve and gum cover
There is confining pressure chamber, and sleeve 9 is externally provided with confining pressure loading device；One entrance vacation core 12 and an entrance plug 11 are successively from clamper
Entrance side is filled in gum cover 10, and the entrance side of clamper is equipped with inlet cap 15, and one exports false core 34 and an outlet plug
35 successively fill in gum cover 10 from the outlet side of clamper, and the false core 34 of the entrance vacation core 12 and outlet is along respective central axes
It is respectively equipped with water stream channel 40, and entrance vacation core 12 and exports on false core 34 side relative to each other respectively from center along diameter
Multiple seepage tanks 37 are equipped with to diverging；
Two throughbores are equipped in the entrance plug 11 with its axis parallel, a throughbore passes through pipeline I
33 are connected to external water flood device, and pipeline I 33 is equipped with valve I 33-1 and temperature sensor 18, and another throughbore passes through
Pipeline II 32 is connected to outside, and pipeline II 32 is equipped with II 32-1 of valve；
Single Fracture sample 13, simple check are equipped in the cavity that the entrance vacation core 12, the false core 34 in outlet, gum cover 10 surround
It is spaced apart along its length in gap sample 13 equipped with multiple instrument connection groups, the instrument connection group includes one from Single Fracture sample
13 outer walls radially pass to the counterbore 13- that the through-hole 13-1 and one of fissure-plane 13-3 is inwardly opened up from 13 outer wall of Single Fracture sample
2, the bottom of the counterbore 13-2 is close to fissure-plane 13-3；Respectively with water flow in the false core 34 of the entrance vacation core 12 and outlet
Channel 40 is that starting point is radially extended equipped with sense channel 50, in each sense channel 50, through-hole 13-1 and counterbore 13-2 all
Equipped with thermometric line 21, the thermometric line 21 all draws clamper by the wiring groove 17 being arranged in outlet plug 35 jointly, described
Outlet 35 center of plug is axially arranged with water flow fairlead 35-1 along it, and one end that water flow fairlead 35-1 exposes outlet plug 35 is logical
It crosses outlet pipe and is connected to a water flow meter 60, the outlet pipe is equipped with triple valve 31 and counterbalance valve 19；Outside the sleeve 9
Equipped with the wide measuring device 14 of gap, the probe 14-1 of the wide measuring device 14 of gap passes through sleeve 9 and glue perpendicular to fissure-plane 13-3
Set 10 and the outer wall for withstanding Single Fracture sample 13.
The temperature sensor 18, thermometric line 21 draw the end of clamper, the wide measuring device 14 of gap, water flow meter 60
It is commonly connected on a data collector 70.The data collector 70 of use can select the PCI720 type of Advantech to acquire
Device can be come out with the detection data of real-time reception to each detection part and real-time display.
Preferably, the confining pressure loading device includes ring press pump 23 and heating mantle 25, and 25 sets of the heating mantle is in sleeve 9
On, sleeve 9 is equipped with fuel feed hole 9-1 and oil outlet 9-2, and fuel feed hole 9-1 and oil outlet 9-2 are all passed to outside sleeve 9 from confining pressure chamber
Portion；The outlet of the ring press pump 23 connects a pressure pipeline, and the pressure pipeline passes through heating mantle 25 and is connected to fuel feed hole 9-1
On, a pressure relief pipeline is connected on oil outlet 9-2, pressure relief pipeline passes through heating mantle 25 and passes in atmosphere, on the pressure pipeline
Equipped with switch 26, pressure relief pipeline is equipped with exhaust valve 28.Heating mantle 25 can have temp sensing function, can be heated to real-time measurement
Temperature；Heating mantle 25 also can be used electric heating, heating efficiency with higher, first heating muff 9, heat can from sleeve 9 to
It is inside transmitted to pressure oil, gum cover 10 and reaches 13 surface of Single Fracture sample.
Above-mentioned confining pressure loading device further includes a circulating pump 24, and one end of circulating pump 24 is connected to by circulating valve I 27 to be added
Pressure pipe road, the pressure relief pipeline are equipped with circulating valve II 29, the other end of circulating pump 24 between oil outlet 9-2 and exhaust valve 28
It is connected to the relief tube section between exhaust valve 28 and circulating valve II 29.Circulating pump 24 can hold the pressure oil in confining pressure chamber
Continuous circulation avoids heat transfer that the oil temperature of different location is caused difference occur, and oil temperature is uniform everywhere for the pressure oil in guarantee confining pressure chamber；It follows
Pressure oil can also be compensated when ring pump 24 is with heating function in time because transferring heat to the heat of water flow loss, guarantee Single Fracture examination
13 hull-skin temperature all-the-time stable of sample.
Further, the side surrounding water stream channel 40 for exporting false core 34 towards outlet plug 35 is equipped with an O-ring 38,
O-ring 38 is located between the false core 34 in outlet and outlet plug 35, and it is direct that the water flowed out from water stream channel 40 can be effectively prevented
Into damage thermometric line 21 in wiring groove 17.
Preferably, wiring groove 17 expose clamper notch be equipped with pressure resistance cushion 17-1, the pressure resistance cushion 17-1 by
Three layers of cushion material composition, respectively polyimides, polytetrafluoroethylene (PTFE), polyimide material, thermometric line 21 pass through pressure-resistant cushion
17-1 simultaneously draws clamper, and pressure-resistant cushion 17-1 has the characteristics that pressure resistance, can tightly fix thermometric line 21.
Preferably, the wide measuring device 14 of gap includes LVDT displacement sensor, the probe 14-1 and LVDT of the wide measuring table of gap
Displacement sensor connection, can measure the vertical deformation amount △ b in sample crack, and LVDT according to the wide selection range of gap
Displacement sensor is connected on data collector 70.
The thermal loss in crack is flowed into reduce water flow from clamper entrance, the inlet cap 15 is designed as hollow knot
Structure, entrance plug 11 use nonmetallic polyimide material, and entrance vacation core 12 uses polytetrafluoroethylene material, using such
Material conducts heat low efficiency has further reduced the difference between the crack inlet water temperature in clamper inlet water temperature and clamper,
Also the temperature for reducing clamper inlet port pressure oil as far as possible influences the heat transfer of water flow.
Preferably, 10 outer wall of gum cover is equipped with positioning column 20, and positioning column 20 can cooperate in the hole of insertion 9 inner wall of sleeve,
When in the hole that positioning column 20 is embedded in 9 inner wall of sleeve, the fissure-plane 13-3 of Single Fracture sample 13 and the spy of the wide measuring device 14 of gap
Head 14-1 is just vertical.First Single Fracture sample 13 is pushed into gum cover 10 when loading, then gum cover 10 is positioned by positioning column 20
In sleeve 9, positioning column 20 facilitates the positioning of fissure-plane 13-3, can guarantee the fissure-plane of Single Fracture sample 13 after dress sample
13-3 and the probe 14-1 of the wide measuring device 14 of gap are vertical always.
The fissure-plane 13-3 of the Single Fracture sample 13 is designed in advance, is cut by yarn cutting machine.
Pressure sensor I 30 is connected on the triple valve 31, pipeline I 33 is equipped with pressure sensor II 22, each pressure
Sensor is commonly connected on data collector 70.It can be measured two in flow event by the pressure sensor at clamper both ends
Side pressure force gradient；The water flow meter 60 is electronic balance, and electronic balance measures the water flow of injection beaker at regular intervals
Weight, you can get it flow, the flow number are equal to the flow Q of input clamper entrance, and the water flow come out from clamper is more
Add stabilization, the flow measured is more accurate and reliable.
Preferably, in order to guarantee stable connection, inlet cap 15 is fixed on the entrance of sleeve 9 by ingress protection lid 16
Side, the outlet side that outlet plug 35 is fixed on sleeve 9 by exporting protection cap 36.
Preferably, in order to guarantee stability, prolong the service life, thermometric line 21 is fixed on each hole by refractory seals glue
And in channel.Thermometric line temperature-measuring range is -200-260 DEG C.
The variable being related to is studied as shown in figure 5, entering crack inlet temperature Tin2 including flow Q (ml/min), water flow
(DEG C), rock hull-skin temperature T0 (DEG C), the wide b of rock fracture gap (um), crack exit water temperature Tout (DEG C), in crack along Cheng Shui
Warm Tf (DEG C), crack are along journey inner surface rock temperature Ti (DEG C).
Data measuring method in the utility model Single Fracture seepage flow diabatic process, specifically comprises the following steps:
Step 1: with yarn cutting machine by Rock cutting be the Single Fracture sample 13 with a certain rough features, be used in combination
0.8mm drill bit is drilled with multiple through-hole 13-1 and counterbore 13-2, the bottom of counterbore 13-2 from 13 surface of Single Fracture sample is spaced inwardly
Close to fissure-plane 13-3, aperture 1mm, thermometric line 21 is respectively implanted in through-hole 13-1, counterbore 13-2 and sense channel 50, thermometric
Line 21 is fixed in each hole and channel by refractory seals glue, and 13 two sides of Single Fracture sample are sealed with AB glue, then by Single Fracture
Sample 13 is fitted into clamper, and makes the probe 14-1 of the wide measuring device 14 of gap perpendicular to fissure-plane 13-3, and thermometric line 21 is all logical
The wiring groove 17 being arranged in outlet plug 35 is crossed to draw clamp body and be connected to data collector 70；
Step 2: turning on the switch 26, exhaust valve 28, circulating valve II 29, closes circulating valve I 27, then drive 23 row of ring press pump
Air in confining pressure chamber out closes exhaust valve 28, applies confining pressure σ to the intracavitary addition pressure oil of confining pressure such as dimethicone3And it surveys
The deformation in crack is Δ b under the confining pressure out, it is known that in confining pressure σ3Under the conditions of crack width be b0- Δ b；Turn off the switch 26
Clamper is heated to target temperature T0 with heating mantle 25 after pressure stabilizing, opens simultaneously circulating valve I 27, circulating pump 24 works, will
Pressure oil extraction in confining pressure chamber carries out circulation and keeps samming；After temperature is stablized, the Single Fracture sample 13 under heat transfer effect
Pressure oil temperature in hull-skin temperature, confining pressure chamber is consistent with 9 surface temperature of holder sleeve, is T0；
Step 3: opening external water flood device, flow Q is injected into pipeline I 33, the water flow that temperature is Tin1, pressed from both sides at this time
Holder inlet water temperature is Tin1；The triple valve 31 on clamper outlet pipe is closed, opens II 32-1 of valve, water flows through pipe at this time
Line I 33 enters entrance plug 11 and enters fissure-plane 13-3 through the water stream channel 40 of entrance vacation core 12, due to 31 quilt of triple valve
It closes, water flow can flow out from another throughbore of entrance plug 11, clamper, entrance vacation core 12 is discharged through pipeline II 32
Sense channel 50 in the temperature that measures of thermometric line 21 be crack inlet water temperature Tin2, the temperature that temperature sensor 18 monitors
Degree is clamper inlet water temperature Tin1；To clamper inlet water temperature Tin1 and crack inlet water temperature Tin2 in different flow Q, list
Relationship under the conditions of 13 hull-skin temperature T0 of crack sample is demarcated, and is obtained the relationship between Tin2 and Tin1, is guaranteed accordingly
Tin2 is consistent with design value；
Step 4: needing to study in a certain crack inlet water temperature Tin2, crack width is b0- Δ b, Single Fracture sample appearance
When heat transfer situation under face temperature T0, flow Q, first the relationship according to the Tin2 and Tin1 of above-mentioned steps three is obtained under the operating condition
Tin1 value；External water flood device is controlled again to inject the water flow that temperature is Tin1 with flow Q, water flow is flowed out from pipeline II 32, when
When the detection of temperature sensor 18 temperature reaches Tin1, setting 19 pressure of counterbalance valve is 0.1MPa, opens triple valve 31, closes valve
II 32-1, water flow is passed through from the Single Fracture sample 13 in clamper at this time, after stability of flow, utilizes the false core 34 in outlet
Thermometric line 21 in sense channel 50 measures crack exit water temperature Tout, measures crack using the thermometric line 21 in each through-hole 13-1
The interior crack that measures along Cheng ShuiwenT f, using the thermometric line 21 in each counterbore 13-2 is along journey inner surface rock temperature Ti.
Step 5: can derive according to obtained data and convection transfer rate h is calculated, and calculating process is as follows:
After water rock reaches stable state, rock interior heat transfer, the heat three that heat, the water of the exchange of water rock are taken away are equal,
Wherein, the heat that water is taken away are as follows:
Q1=cpqvρw(Tout-Tin2)
Wherein, Q1--- the heat that water is taken away, J/s；cp--- the specific heat at constant pressure of water, J/ (kgK)；qv--- the stream of water
Amount, m3/s；ρw--- the density of water, kg/m3；qvFor the volume flow of fluid, qv=v*b*2R, v are the speed of water, and b is that gap is wide,
R is the radius of cylindrical Single Fracture sample 13；
The heat of water rock exchange are as follows:
Wherein,--- the mean temperature of the entire inner surface of rock；It is water flow along the mean temperature of entire surface；
H --- convection transfer rate, W/m2·K；A --- water rock contact area is in test 2wL, and w is that crack is wide, in test
It is the length of Single Fracture sample 13 for 2R, L；
Above-mentioned two heat is equal, then:
1. the cylindrical radial temperature of Single Fracture sample 13 is linearly distributed, at this time when fluid flow is in 5ml/min or less
The mean temperature of rock inner surfaceAre as follows:
In above formula,The multiple crack internal surface temperature T measured for deviceiAverage value, T0For rock hull-skin temperature,
The mean temperature of water flow at this timeAre as follows:
T1It is device according to obtaining matched curve, fitting formula form based on Cheng ShuiwenT f in the multiple cracks measured
It is as follows:
T1=T0+(Tin2-T0)exp(-B)
In formula, B is the coefficient of matched curve；
The then mean temperature of water flowAre as follows:
In above formula,For the average value in crack along Cheng Shuiwen；
Then, under such operating condition convection transfer rate h calculation formula are as follows:
2. when fluid flow is in 5ml/min or more, the cylindrical radial temperature of Single Fracture sample 13 is distributed in quadratic function,
At this point, the mean temperature of rock inner surface at this timeAre as follows:
In above formula,The multiple crack internal surface temperature T measured for deviceiAverage value, T0For rock hull-skin temperature,
Under this high flow velocities, the mean temperature of water flowAre as follows:
Then, under such operating condition convection transfer rate h calculation formula are as follows:
Claims (7)
1. the data measurement unit in a kind of crack sample seepage flow-diabatic process, including clamper, which is characterized in that
The clamper includes sleeve (9), and gum cover (10), sleeve (9) inner wall and gum cover are coaxially equipped in the sleeve (9)
(10) confining pressure chamber is equipped between outer wall, and sleeve (9) is externally provided with confining pressure loading device；One entrance vacation core (12) and an entrance are stifled
Head (11) is successively filled in gum cover (10) from the entrance side of clamper, and the entrance side of clamper is equipped with inlet cap (15), and one
It exports false core (34) and outlet plug (35) is successively filled in gum cover (10) from the outlet side of clamper, the entrance vacation rock
The false core (34) of core (12) and outlet is respectively equipped with water stream channel (40) along respective central axes, and entrance vacation core (12) and outlet
False core (34) respectively radially diverges from center equipped with multiple seepage tanks (37) on side relative to each other；
Two throughbores are equipped in the entrance plug (11) with its axis parallel, a throughbore passes through pipeline I
(33) it is connected to external water flood device, pipeline I (33) is equipped with valve I (33-1) and temperature sensor (18), another water flow
Through-hole is connected to outside by pipeline II (32), and pipeline II (32) is equipped with valve II (32-1)；
Single Fracture sample (13) are equipped in the cavity that the entrance vacation core (12), the false core (34) in outlet, gum cover (10) surround,
It is spaced apart along its length in Single Fracture sample (13) equipped with multiple instrument connection groups, the instrument connection group includes one from simple check
Gap sample (13) outer wall radially pass to through-hole (13-1) He Yicong Single Fracture sample (13) outer wall of fissure-plane (13-3) to
The counterbore (13-2) inside opened up, the bottom of the counterbore (13-2) is close to fissure-plane (13-3)；The entrance vacation core (12) and
It exports and is respectively radially extended for starting point equipped with sense channel (50), each detection with water stream channel (40) in false core (34)
Thermometric line (21) all are equipped in channel (50), through-hole (13-1) and counterbore (13-2), the thermometric line (21) is all stifled by outlet
The wiring groove (17) being arranged in head (35) draws clamper jointly, and the outlet plug (35) center is axially arranged with water flow along it and draws
Portal (35-1), and one end that water flow fairlead (35-1) exposes outlet plug (35) is connected to a water flow meter by outlet pipe
(60), the outlet pipe is equipped with triple valve (31) and counterbalance valve (19)；The wide measuring device of gap is equipped with outside the sleeve (9)
(14), the probe (14-1) of the wide measuring device of the gap (14) passes through sleeve (9) and gum cover (10) perpendicular to fissure-plane (13-3)
And withstand the outer wall of Single Fracture sample (13)；
The temperature sensor (18), thermometric line (21) draw the end of clamper, the wide measuring device of gap (14), water flow meter
(60) it is commonly connected on a data collector (70).
2. the data measurement unit in crack sample seepage flow-diabatic process according to claim 1, which is characterized in that institute
Stating confining pressure loading device includes ring press pump (23) and heating mantle (25), and the heating mantle (25) covers on sleeve (9), sleeve (9)
It is equipped with fuel feed hole (9-1) and oil outlet (9-2), fuel feed hole (9-1) and oil outlet (9-2) all pass to sleeve (9) from confining pressure chamber
It is external；The outlet of the ring press pump (23) connects a pressure pipeline, the pressure pipeline pass through heating mantle (25) and be connected into
On oilhole (9-1), a pressure relief pipeline is connected on oil outlet (9-2), pressure relief pipeline passes through heating mantle (25) and passes in atmosphere, institute
It states pressure pipeline and is equipped with switch (26), pressure relief pipeline is equipped with exhaust valve (28).
3. the data measurement unit in crack sample seepage flow-diabatic process according to claim 2, which is characterized in that also
Including a circulating pump (24), one end of circulating pump (24) is connected on pressure pipeline by circulating valve I (27), the pressure relief pipeline
Circulating valve II (29) is equipped between oil outlet (9-2) and exhaust valve (28), the other end of circulating pump (24) is connected to exhaust valve
(28) the relief tube section between circulating valve II (29).
4. the data measurement unit in crack sample seepage flow-diabatic process according to claim 1, which is characterized in that institute
It states the side surrounding water stream channel (40) for exporting false core (34) towards outlet plug (35) and is equipped with an O-ring (38), O-ring
(38) it is located between the false core (34) in outlet and outlet plug (35).
5. the data measurement unit in crack sample seepage flow-diabatic process according to claim 1, which is characterized in that institute
The notch for stating wiring groove (17) exposing clamper is equipped with pressure-resistant cushion (17-1), and the pressure resistance cushion (17-1) is by three layers of cushion
Material composition, respectively polyimides, polytetrafluoroethylene (PTFE), polyimide material, thermometric line (21) pass through pressure-resistant cushion (17-1)
And draw clamper.
6. the data measurement unit in crack sample seepage flow-diabatic process according to claim 1, which is characterized in that gap
Wide measuring device (14) includes LVDT displacement sensor, and the probe (14-1) and LVDT displacement sensor of the wide measuring table of gap connect
It connects, and LVDT displacement sensor is connected on data collector (70).
7. the data measurement unit in crack sample seepage flow-diabatic process according to claim 1, which is characterized in that institute
It states inlet cap (15) and is designed as hollow structure, entrance plug (11) uses nonmetallic polyimide material, entrance vacation core
(12) polytetrafluoroethylene material is used.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270117A (en) * | 2018-11-16 | 2019-01-25 | 中国矿业大学 | Data measurement unit and measurement method in a kind of crack sample seepage flow-diabatic process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270117A (en) * | 2018-11-16 | 2019-01-25 | 中国矿业大学 | Data measurement unit and measurement method in a kind of crack sample seepage flow-diabatic process |
| CN109270117B (en) * | 2018-11-16 | 2023-10-27 | 中国矿业大学 | Data measuring device and method in seepage-heat transfer process of fracture sample |
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