A kind of high-pressure solid bentonite heat-water-force coupling action simulation testing instrument
Technical field
The invention belongs to bentonite heat-water-force coupling action experimental rig field, in particular to a kind of high-pressure solid bentonite
Heat-water-force coupling action simulation testing instrument.
Background technique
As fossil energy is increasingly depleted and environmental pollution is on the rise, nuclear energy receives more and more national in the world
Favor, however while nuclear energy brings benefit, also leave a large amount of high radioactive nucleus wastes.Current feasible place most generally acknowledged in the world
The mode of setting is to dispose deeply, and bentonite becomes nuclear waste disposal because having many advantages, such as low-permeability, high-expansion and strong adsorptivity
The backfill of library first choice and packing material.But with the continuous passage of time, some problems are also therefrom had found, the half of nuke rubbish
The phase decline up to tens of thousands of years, will lead to disposition library hot soak condition, therefore bentonite need to be determined in heat-water-power three effect
Under mechanical property, to ensure its safety, at present laboratory can only test single factors effect under performance change, it is difficult to mould
Long-term behaviour variation of the quasi- bentonite under underground water, high temperature and high pressure conditions, therefore urgently new device improves existing set
It is standby.
Currently, also someone proposes new technical solution to the above problem, such as Chinese patent literature CN200920154214
A kind of microcomputer recorded controls high-temperature expansion and permeability tester, and the technical solution being previously mentioned in the document has following
Disadvantage:
1, flow dividing structure has been used in the water feed apparatus of the document, provides water pressure by the big water vat of piston press, water segregator is logical
It crosses pipeline to connect with multiple filling valves, pipeline valve and pressurizing valve, pressure applied value is not accurate enough;
2, the measure of water that the document is proposed is by reading the poor calculation permeability coefficient of water, measured water difference essence
It spends not high;
3, structure is complicated, and manufacturing cost is high, and the big water vat mentioned in the patent needs to inject a certain amount of water, it is ensured that entire
The temperature of insulating box inner space and water changes in a certain range, needs to expend a large amount of energy, and realizes that difficulty is high;
4, whole device is unfavorable for disassembly and assembly, and when experiment terminates to need replacing sample, disassembly trouble is inconvenient for operation;
5, the influence for detection temperature to the sample coefficient of expansion, the position of temperature detecting point is not suitable for, although insulating box can
To play insulation effect, but it cannot be guaranteed that the temperature of each component in insulating box is just as;It is nearby surveyed close to sample
Temperature be only most rationally.
Summary of the invention
In view of technical problem present in background technique, a kind of high-pressure solid bentonite heat-water-couple of force provided by the present invention
Cooperation simulation testing instrument can precisely simulate nuke rubbish and decay in 28 DEG C -200 DEG C and heat effect and accurately measure swollen
Moisten native infiltration coefficient, bentonite bentonitic infiltration and expansion under underground water, high temperature and load coupling can also be simulated
The property evolutions such as power rule, the feasibility for evaluation bentonite for Nuclear Waste Repository buffer layer provide judgment basis.
In order to solve the above-mentioned technical problem, this invention takes following technical solutions to realize:
A kind of high-pressure solid bentonite heat-water-force coupling action simulation testing instrument, including chassis, chassis are equipped with heat insulation pedestal, every
It has been removably secured heated base on hot pedestal, water supply pedestal has been removably secured on heated base, it can on water supply pedestal
Long piston guide rings have been removedly fixed, long piston is equipped in long piston guide rings, the induction of long top land and pressure sensor is visited
Head contact;
It is equipped with helicla flute between the heated base and water supply pedestal, is equipped with helicla flute in water supply pedestal, in water supply pedestal
Helicla flute is equipped with temperature sensor;Helicla flute both ends between heated base and water supply pedestal have been respectively communicated with oil inlet pipe and fuel-displaced
Pipe, the oil inlet pipe and flowline are connected to oil circulating pump, and oil inlet pipe and flowline are close to be provided with storage tank at heated base;For
Helicla flute in water-bed seat is communicated with water inlet pipe and outlet pipe, and water inlet pipe is connect with GDS pressure controller, discharging device and water outlet
Pipe connection.
In preferred scheme, cutting ring is embedded between the water supply pedestal and water supply pedestal, cutting ring top and bottom are equipped with metal
Permeable stone, metal permeable stone and long piston contact above cutting ring, the metal permeable stone above cutting ring are connected to outlet pipe, it is described go out
Water pipe is connected to through long piston and with the discharging device outside the present apparatus, and the discharging device is connected with syringe;Gold below cutting ring
Belong to permeable stone to contact with helicla flute.
In preferred scheme, thermal insulation layer, thermal insulation layer are equipped with outside the heated base, water supply pedestal and long piston guide rings
Insulation ring is connected between heated base, water supply pedestal and long piston guide rings;
Chassis is connect by external spiral strut with upper cover, equipped with cylinder between chassis and upper cover, the cylinder and upper cover with every
Thermosphere connection;Chassis, upper cover, cylinder and thermal insulation layer form closed space, by the heated base, water supply pedestal and long work
Plug lead ring wraps;Long upper piston area is through upper cover and thermal insulation layer.
In preferred scheme, the upper cover top is connect by external spiral strut with top plate, and digging in the middle part of top plate has mouth,
The mouth of the top plate is equipped with pressure sensor, and the top of mouth is arranged in the pressure adjustment button of pressure sensor.
In preferred scheme, the long piston is located at long piston guide rings inner part, long piston and long piston guide rings inner wall
Junction is equipped with sealing ring;Cutting ring diameter is greater than long piston guide rings internal diameter, is equipped with sealing in cutting ring and long piston guide rings junction
Circle;Water supply pedestal and heated base junction are equipped with sealing ring.
In preferred scheme, the cutting ring is hollow structure, and upper and lower surface is equipped with filter paper, and being integrally pressed into cutting ring has
Sample, sample are close to the filter paper.
In preferred scheme, the temperature range of the heated base is 28 DEG C -200 DEG C.
In preferred scheme, the insulation ring and thermal insulation layer are Teflon material.
In preferred scheme, the inductive probe and metal permeable stone of the long piston and pressure sensor connect naturally
Touching;The vertical central axis line coincidence of the inductive probe of pressure sensor, long piston, metal permeable stone and long piston guide rings.
In preferred scheme, the inside spin strut is through heat insulation pedestal, heated base, water supply pedestal and long piston
Lead ring is fixed close to outer wall position, and by heat insulation pedestal, heated base, water supply pedestal and long piston guide rings.
In preferred scheme, cooling fin is provided with outside the storage tank.
This patent can reach it is following the utility model has the advantages that
1, this patent is carved with spiral groove in water supply pedestal, therefore being not required to setting flow dividing structure uniformly can apply hydraulic pressure to sample
Power, and water pressure is directly provided by external GDS controller, can more accurately apply pressure value;
2, this patent is mainly the quality calculation permeability coefficient by weighing water outlet, and such water quality can be as accurate as decimal
It is poor accurate more than water is directly read two after point;
3, helicla flute can increase the contact area of metal permeable stone and oil, more conducively conduct heat, while helicla flute can also increase
The contact area of metal permeable stone and water utilizes the transmitting of heat;
4, storage tank can store certain oil mass and be close to heated base, can be further improved the release of heat in oil;
5, for the present apparatus using oil circulating pump as temperature control equipment, temperature regulating effect is good;
6, the helicla flute in water supply pedestal is arranged in temperature sensor, can really reflect the variation of specimen temperature in cutting ring;
7, heat insulation pedestal, heated base, water supply pedestal and long piston guide rings are detachably connected, facilitate test operation;
8, the present apparatus is cheap, structure is simple, and heated base and water supply pedestal are able to carry out the infiltration under water and hot collective effect
Thoroughly, expansive force long-term performance test;
9, heated base and oil inlet pipe and flowline can carry out in 28 DEG C of -200 DEG C of temperature ranges and when long according to test requirements document
Between simulate;
10, the expansive force or dilatancy that pressure sensor cooperates long piston to be capable of measuring in bentonite slaking process.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is main view of the present invention;
Fig. 2 is top view of the present invention;
Fig. 3 is cutting ring structure chart of the present invention;
Fig. 4 is water supply understructure figure of the present invention;
Fig. 5 is heated base structure chart of the present invention.
In figure: top plate 1, pressure sensor 2, upper cover 3, long piston 4, long piston guide rings 5, insulation ring 6, thermal insulation layer 7, heating
Pedestal 8, heat insulation pedestal 9, metal permeable stone 10, sample 11, cutting ring 12, water supply pedestal 13, external spiral strut 14, inside spin strut
15, chassis 16, helicla flute 17, pressure adjustment button 18, storage tank 19.
Specific embodiment
Preferred scheme is as shown in Figure 1, a kind of high-pressure solid bentonite heat-water-force coupling action simulation testing instrument, including bottom
Disk 16, chassis 16 are equipped with heat insulation pedestal 9, have been removably secured heated base 8 in heat insulation pedestal 9, removable on heated base 8
It is fixed with water supply pedestal 13 with unloading, long piston guide rings 5 has been removably secured on water supply pedestal 13, have been equipped in long piston guide rings 5
Long piston 4, long 4 top of piston are contacted with the inductive probe of pressure sensor 2;
It is equipped with helicla flute 17 between the heated base 8 and water supply pedestal 13, is equipped with helicla flute 17 in water supply pedestal 13, supplies water
Helicla flute 17 in pedestal 13 is equipped with temperature sensor;17 both ends of helicla flute difference between heated base 8 and water supply pedestal 13
It is communicated with oil inlet pipe and flowline, the oil inlet pipe and flowline are connected to oil circulating pump, and oil inlet pipe and flowline are close to heating
Storage tank 19 is provided at pedestal 8;Helicla flute 17 in water supply pedestal 13 is communicated with water inlet pipe and outlet pipe, discharging device and water outlet
Pipe connection, water inlet pipe are connect with GDS pressure controller;The GDS pressure controller is water feed apparatus;
The temperature range of the heated base 8 is 28 DEG C -200 DEG C;
Since the critical-temperature that water vaporizes at normal atmospheric pressure is 100 degrees Celsius, it is desirable to guarantee water at 200 degrees Celsius
It does not vaporize, then hydraulic pressure cannot be less than 1.6MPa, and the water pressure range that GDS pressure controller can provide is 0-3MPa, therefore full
Sufficient pressure is not less than the requirement of 1.6MPa;Present apparatus heated base 8, water supply pedestal 13 and long piston guide rings 5 are by inside spin strut
15 are tightly secured together, and are sealed between each other by sealing ring, since infiltration coefficient is minimum after 11 water-swellable of sample, this
A confined space is collectively formed in the helicla flute 17 of the metal permeable stone 10 and water supply pedestal 13 that allow for 11 lower section of sample, this
Confined space can be considered a pressure chamber, and GDS pressure controller is connected to this confined space by water inlet pipe, can be applied
Add certain water pressure;
Hot water radiation wire can be selected as measuring cell in the temperature sensor, measures sensitive, applicable hot environment;Hot water radiation wire can
It is connected to temperature transmitter, temperature instruction is scaled by resistance value;TBC.0502, the temperature can be selected in temperature transmitter model
Transmitter band temperature display;
Cutting ring 12 is embedded between water supply pedestal 13 and water supply pedestal 13,12 top and bottom of cutting ring are equipped with metal permeable stone 10, cutting ring 12
Metal permeable stone 10 above is contacted with long piston 4, and the metal permeable stone 10 above cutting ring 12 is connected to outlet pipe, the outlet pipe
It is connected to through long piston 4 and with the discharging device outside the present apparatus, the discharging device is connected with syringe;Metal below cutting ring 12
Permeable stone 10 is contacted with helicla flute 17;
Specific measure of water principle:
First, discharging device outlet pipe is connect with syringe, the quality calculating infiltration system of water in syringe is flowed by calculating
Number;Calculation formula: k=QL/AHt
In formula: k-infiltration coefficient;
Q-water volume (experimental water is pure water, and the volume of 1g water is 1cm3);
L-specimen height (this patent specimen height is 1cm);
A-specimen cross section area (this patent specimen cross section area is 3.142.5*2.5cm2);
H-water-head (water pressure of 100m water-head is 1Mpa);
GDS pressure controller can recorde the variation Q of itself water volume, and the infiltration of sample can be calculated by bringing Q value into above formula
Saturating coefficient, this method can be used as a kind of auxiliary calculation, and then improve the accuracy of experimental data;
Calculation formula described above is common knowledge.
Preferred scheme is as shown in Figure 1,4 bottom of long piston may be configured as recess hollow structure, in the recess
Hollow structure can be used for being put into metal permeable stone 10.
Preferred scheme is as shown in Figure 1, Figure 4 and Figure 5, sets outside heated base 8, water supply pedestal 13 and long piston guide rings 5
There is thermal insulation layer 7, is connected with insulation ring 6 between thermal insulation layer 7 and heated base 8, water supply pedestal 13 and long piston guide rings 5;It is described every
Gas ket 6 is ring structure, and quantity is two, and the setting of insulation ring 6 is in 13 junction of heated base 8 and water supply pedestal, one
A setting of insulation ring 6 is in long piston 4 and 10 junction of metal permeable stone;
Further, the thermal insulation layer 7 and insulation ring 6 form three closed spaces, we are from top to bottom successively here
The temperature of referred to as epicoele, lumen and cavity of resorption, epicoele, lumen and cavity of resorption is different, and epicoele temperature is minimum, and lumen is secondly, cavity of resorption
Temperature highest;
Chassis 16 is connect by external spiral strut 14 with upper cover 3, cylinder is equipped between chassis 16 and upper cover 3, and cylinder is heat-insulated
Outside layer 7, the cylinder and upper cover 3 are connect with thermal insulation layer 7;Chassis 16, upper cover 3, cylinder and thermal insulation layer 7 form closed sky
Between, the heated base 8, water supply pedestal 13 and long piston guide rings 5 are wrapped;Long 4 top of piston through upper cover 3 and every
Thermosphere 7;
The helicla flute 17 of 10 lower part of metal permeable stone below the cutting ring 12 is communicated with water inlet pipe and outlet pipe, from for the bottom
Seat 13 is drawn, then penetrates thermal insulation layer 7 and cylinder;The water inlet pipe and outlet pipe are close to that storage tank is arranged at 13 outer wall of water supply pedestal
19;
The outlet pipe that metal permeable stone 10 above the cutting ring 12 is connected to is drawn from long 4 top of piston, then penetrates thermal insulation layer 7
With upper cover 3;The outlet pipe is close to settable storage tank 19 at long 4 outer wall of piston;
The oil inlet pipe and flowline is drawn by heated base 8, then penetrates thermal insulation layer 7 and cylinder;The oil inlet pipe and
Flowline is close to that storage tank 19 is arranged at heated base 8;The storage tank 19 of 8 outer wall of the heated base setting is provided with cooling fin, can
To improve heat dissipation effect.
Preferred scheme is as depicted in figs. 1 and 2, and 3 top of upper cover is connect by external spiral strut 14 with top plate 1, in top plate 1
Portion, which is dug, mouth, and the mouth of the top plate 1 is equipped with pressure sensor 2, and mouth is arranged in the pressure adjustment button 18 of pressure sensor 2
Top;
2 range ability of pressure sensor is 0-5MPa, precision 0.1MPa;ELE801 may be selected in its model.
Preferred scheme is as shown in Figure 1, long piston 4 is located at long 5 inner part of piston guide rings, long piston 4 and long piston guide rings 5
Inner wall junction is equipped with sealing ring;12 diameter of cutting ring is greater than long 5 internal diameter of piston guide rings, connect in cutting ring 12 with long piston guide rings 5
Place is equipped with sealing ring;Water supply pedestal 13 and 8 junction of heated base are equipped with sealing ring.
Preferred scheme is as shown in figures 1 and 3, and cutting ring 12 is hollow structure, and upper and lower surface is equipped with filter paper, in cutting ring 12
Whole indentation has sample 11, and sample 11 is close to the filter paper.
8 working method of heated base are as follows: the power by oil circulating pump as oil circulation is set in oil circulating pump outlet
Electric heater unit is set, effect is heated for oil;When sample 11 needs 50 degree of temperature, oil can be heated to 80 degree, and
Make oil by oil inlet pipe, helicla flute 17 and flowline circulation cooling by oil circulating pump;Here it is worth noting that the temperature of oil
Higher heat dissipation is more obvious, and the faster heat dissipation of oil circulating pump revolving speed is more obvious;The temperature value of above-mentioned offer only to facilitate understand and
The reference value of proposition.
Preferred scheme is as shown in Figure 1, the insulation ring 6 and thermal insulation layer 7 are Teflon material;The material heat insulation
It is significant with high-temperature resistant result.
Preferred scheme as shown in Figure 1, long piston 4 and pressure sensor 2 inductive probe and metal permeable stone 10 from
So contact;The inductive probe of pressure sensor 2, long piston 4, metal permeable stone 10 and long piston guide rings 5 vertical central axis line weight
It closes.
Preferred scheme as shown in Figure 1, inside spin strut 15 through heat insulation pedestal 9, heated base 8, water supply pedestal 13
With long piston guide rings 5 close to outer wall position, and heat insulation pedestal 9, heated base 8, water supply pedestal 13 and long piston guide rings 5 are consolidated
It is fixed.
The work step of whole device is as follows:
1, one piece of metal permeable stone 10 is placed above 13 helicla flute 17 of water supply pedestal, then sets the cutting ring 12 for having suppressed sample 11
On metal permeable stone 10;
2, by 5 sets of long piston guide rings on cutting ring, and one piece of metal permeable stone 10, metal permeable stone are placed on sample 11
Long piston 4 is placed on 10;
3, long piston guide rings 5 and long piston 4, long piston guide rings 5 and water supply pedestal 13 and water supply pedestal 13 and heated base 8 it
Between sealed by sealing ring;
4, sample 11 is fixed by inside spin strut 15, and contact long piston 4 naturally with pressure sensor 2;
5, the pressure adjustment button 18 of rotating top plate 1 makes the output valve range 0MPa-5MPa of pressure sensor 2;
6, by after whole fix, water inlet pipe is connected, and flow out it in the other side, so that helicla flute 17 and metal permeable stone is discharged
Bubble in 10;
7, the oil inlet of heated base 8 and oil outlet are connected on oil circulating pump, the temperature for being kept fixed oil is followed
The dynamic heating of circulation;
8, on computers by the connection of pressure sensor 2, the change procedure of expansive force is observed in real time;
9, after testing, the analysis of performance Evolution is carried out according to experimental data is obtained.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this hair
Bright protection scope should be with the technical solution of claim record, technical characteristic in the technical solution recorded including claim
Equivalents are protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.