A kind of mercury column interface automatic regulating system and rock core pore structure analyzerTechnical field
The present invention relates to rock core structure of the detecting device design field more particularly to a kind of mercury column interface automatic adjustment systemsSystem and rock core pore structure analyzer.
Background technique
Traditional core porosity measurement generallys use the method that water logging, boiling and other chemical solvents immerse, measurementPrecision is low, and the period is long, and the minimum rock core of especially some porositys also has then since liquid tension cannot achieve measurement using threeDimension imaging technique is measured, however its higher cost does not have wide applicability.Also there is rock core hole knot in the prior artStructure analyzer using gravitational difference principle be measured but due to its it is internal using liquid mercury as internal standard, and the height of mercury columnCan all be changed due to atmospheric pressure with region, season, weather etc., influence whether the result of measurement.
Such as under a kind of simple stress disclosed in Chinese patent CN102252949A loose core porosity determination method,This method controls core axis pressure and confining pressure by two high-pressure pumps respectively, guarantees effectively to seal between rock sample and rubber sleeve inner wall,It is derived with the biaxial stress porosity of pore bridging measurement rock core then according to the mathematical model of experimental physics model foundationThe relational expression of porosity of the rock core under the porosity and biaxial stress under simple stress, finally obtains rock core under simple stressPorosity.This method is difficult to ensure that the pressure of equipment is absolute pressure in implementation process, often makes the relative pressure to beNegative pressure, so as to cause the error of testing result.
In another example a kind of instrument for measuring solid porosity disclosed in Chinese patent CN1388356, is to have used gas shapeState equation, the method for taking gas mobile, by accurately measuring solid volume, and then easily determines the hole of various solidsPorosity, being capable of porosity that is easy, quickly and accurately determining various specifications, shaped solids.The present invention is by sample room 3, expansionRoom 4, connecting pipe 5, pressure sensor 6, measuring circuit 7, triple valve 8,9,10, vacuum pump 11, storage cylinder 12, filter 13,Gas source 14 forms.The instrument measures volume by the mobile method of gas, since gas volume can be with the environment temperature of surroundingError is caused to increase etc. the result that will affect measurement that changes, because without wide applicability.
Summary of the invention
To overcome core porosity measurement device evaluated error existing in the prior art big, the lower problem of applicability,The present invention provides a kind of mercury column interface automatic regulating system and rock core pore structure analyzers.
A kind of mercury column interface automatic regulating system, including atmospheric pressure meter, capture card, PLC controller, jacking system and mercuryCup, the atmospheric pressure meter, capture card, PLC controller and jacking system are sequentially connected in series electrical connection, and the mercury cup is located at lifting systemThe upper end of system, the mercury cup are fixedly connected with jacking system.
Further, the jacking system includes servo motor, elevating screw and turbine box, the servo motor and turbineCase is laterally fixedly connected, and the elevating screw is fixedly connected with turbine box vertical direction, the upper end of the elevating screw and mercury cupIt is fixedly connected.
Further, the lower end of the turbine box is provided with guide plate and is connected and fixed the bracket of device, the bracketUpper end is fixedly connected with turbine box, and the guide plate is fixedly connected with bracket.
Further, the lower end of the mercury cup is provided with mercury cup pillar, the two sides up and down of the mercury cup pillar respectively with mercuryCup is fixedly connected with jacking system, and the bottom of the mercury cup is connect by hose with mercury valve is mended.
It is a further object to provide a kind of rock core holes using the mercury column interface automatic regulating systemStructure determination instrument, including pressure test device, into pressure device, pressure measurement device and rock core apparatus for placing, the air pressure detectionDevice and connect into pressure device by pipeline with pressure measurement device, the rock core apparatus for placing passes through pipeline and pressure measurement dressSet connection.
Further, the pressure measurement device includes mercury stereometer buret a, differential pressure pick-up a, isolating valve a and rock coreRoom valve a, mercury column interface automatic regulating system and benefit mercury valve, core chamber's valve a are connect with benefit mercury valve by pipeline, the mercury bodyThe product lower end gauge line a is connect by pipeline with core chamber valve a with the middle position for mending mercury valve, and the isolating valve a is located at mercury volumeThe upper end of gauge line a is simultaneously connect with mercury stereometer buret a by pipeline, and the differential pressure pick-up a is located at mercury stereometer buret a'sSide is simultaneously firmly connected with it, and the differential pressure pick-up a is connected with the lower end of isolating valve a；The upper end of core chamber's valve a withRock core apparatus for placing is fixedly connected, and the isolating valve a is connect by pipeline with pressure test device and into pressure device.
Further, the lower end of the mercury stereometer buret a is provided with blow valve, the blow valve and mercury stereometer buretA is fixedly connected.
Further, the pressure test device includes pressure sensor c and pressure sensor, the pressure sensor cIt is connected separately with pressure gauge c and pressure gauge d with pressure sensor, the pressure sensor c and pressure sensor are arranged in parallel simultaneouslyBy piping connection, the position among the pressure sensor c and pressure sensor is provided with high-pressure solenoid valve c and high pressure hand-operatedValve c, the high-pressure solenoid valve c and high pressure hand-operated valve c are connected in series.
Further, the rock core apparatus for placing includes vacuum pump and core chamber a, and the vacuum pump and core chamber a pass throughPiping connection, the upper end the core chamber a are provided with evacuation valve, and the evacuation valve is fixedly connected with core chamber a.
Further, the pressure test device and into being provided with gas in the connecting tube of pressure device and pressure measurement deviceTrap.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) mercury column interface automatic regulating system of the invention measures atmospheric pressure by atmospheric pressure meter, and passes through capture cardIt is operated with PLC controller control servo motor, and moves up and down to drive mercury by the straight line that turbine box becomes elevating screwCup moves up and down to be realized that automatic benefit mercury ensures mercury pressure not and is influenced by change of atmospheric pressure to adjust the height in mercury face.
(2) rock core pore structure analyzer of the invention is by mercury column interface automatic regulating system come according to reality when measuringBorder atmospheric value adjust keep rock core indoor top be higher than in mercury cubing pipe and in mercury supplementing cup initial mercury face height, fromAnd the height in continuous mode is made to be absolute altitude, to guarantee the accuracy of measurement result, so that the error of measurement is small.
(3) rock core pore structure analyzer of the invention realizes automatic addition alcohol by alcohol cup and into pressure device, subtractsLack artificial addition alcohol bring mercury volatilization, avoids mercury volatilization bring harm, and reduce waste.
(4) mercury in mercury supplementing cup of the invention is closed using alcohol, reduces the volatilization of mercury, and using transparentFor plexiglass cover on mercury supplementing cup, the situation in mercury supplementing cup, which can either can be clearly seen, again can prevent mercury volatilization to scatter and disappear, it is ensured thatThe safety of tester, and reduce waste.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of mercury column interface automatic regulating system of the invention；
Fig. 2 is the structural schematic diagram of rock core pore structure analyzer of the invention.
Specific embodiment
Below in conjunction with drawings and examples, the present invention will be described in further detail.It should be appreciated that described hereinSpecific examples are only used to explain the present invention, is not intended to limit the present invention.
Embodiment 1
Present embodiment discloses a kind of mercury column interface automatic regulating system, such as Fig. 1, including atmospheric pressure meter 42,Capture card 43, PLC controller 44, jacking system 45 and mercury cup 49, atmospheric pressure meter 42, capture card 43, PLC controller 44 and literDrop system 45 is sequentially connected in series electrical connection, and mercury cup 49 is located at the upper end of jacking system 45, and mercury cup 49 and jacking system 45 pass through screwIt is fixedly connected.Mercury cup 49 is connected with mercury column 54 by hose, and mercury column 54 can also connect core holding unit as simple holePorosity analyzer.Wherein, it is preferred that atmospheric pressure meter 42 uses digital display atmospheric pressure meter, can clearly read atmospheric pressureValue facilitates operator to obtain atmospheric pressure environment.
Specifically, as shown in Figure 1, jacking system 45 includes servo motor 46, elevating screw 47 and turbine box 48, servoMotor 46 is laterally fixedly connected with turbine box 48, and elevating screw 47 is fixedly connected with 48 vertical direction of turbine box, elevating screw 47Upper end be fixedly connected with mercury cup 49 by screw.The rotation of servo motor 46 becomes the straight line of elevating screw 47 by turbine box 48It moves up and down that mercury cup 49 is driven to move up and down to adjust the height in mercury face.10 circle of the rotation of servo motor 46 will drive lifting silkThick stick 47 moves up and down 1 millimeter or so.The upper and lower movable range of mercury cup 49 is 120 millimeters.Preferably, under turbine box 48End is provided with guide plate 481 and is connected and fixed the bracket 482 of device, and upper end and the turbine box 48 of bracket 482 are fixed by screwConnection, guide plate 481 are fixedly connected with bracket 482 by screw.
As shown in Figure 1, the lower end of mercury cup 49 is provided with mercury cup pillar 491, the two sides up and down of mercury cup pillar 491 respectively with mercuryCup 49 is fixedly connected with jacking system 45 by screw, and the bottom of mercury cup 49 is connect by hose 493 with mercury valve 33 is mended.It is preferred that, mercury cup 49 is process by stainless steel, and mercury cup pillar 49 is provided with mercury recirculation hole below, and the mercury in mercury cup 49 can be by thisThe mercury of hole outflow, outflow is connected by hose 493 with mercury valve 33 is mended；Preferably, hose 493 is transparent hose, and is usedSoft tubular lock set fastening.Preferably, mercury cup 49 can also include mercury cup lid, and mercury cup lid is made of organic glass, can pass throughMercury cup lid sees the case where mercury inside mercury cup 49, and can effectively prevent mercury volatilization.The height of mercury solution is not in mercury cup 49More than the half of 49 height of mercury cup, to be closed on mercury face plus part alcohol after installing mercury, to prevent the volatilization of mercury,Alcohol thickness is greater than 10 millimeters, if it find that alcohol is evaporated completely or is added when very little.
The working principle of this specific embodiment:：When reducing mercury column liquid level, by the numerical values recited of atmospheric pressure meterIt judges automatically, is rotated forward by control servo motor 46 and mercury cup 49 is driven to move down, so that mercury column liquid level reduces.?It when increasing mercury column liquid level, is judged automatically by the numerical values recited of atmospheric pressure meter, is rotated forward by control servo motor and drive mercuryCup 49 moves up, so that mercury column liquid level rises；
It can make to control speed by servo motor 46, position precision is very accurate, can convert torque for voltage signalWith revolving speed with drive control object.46 rotor speed of servo motor is controlled by input signal, and energy fast reaction, is being automatically controlledIn system, it is used as executive component, and there are the characteristics such as electromechanical time constant small, the linearity is high, pickup voltage, it can be being receivedElectric signal is converted into angular displacement or angular speed output on motor reel.
Embodiment 2
Present embodiment discloses a kind of rock core pore structure analyzer, such as Fig. 2, including pressure test device 50,Pass through pipeline into pressure device 51, pressure measurement device 52 and rock core apparatus for placing 53, pressure test device 50 and into pressure device 51It is connect with pressure measurement device 52, rock core apparatus for placing 53 is connect by pipeline with pressure measurement device 52.Preferably, air pressure is examinedSurvey device 50 and into being provided with gas trap 41 in the connecting tube of pressure device 51 and pressure measurement device 52.
As shown in Fig. 2, pressure test device 50 include pressure sensor c7 and pressure sensor 8, pressure sensor c7 andPressure sensor 8 is connected separately with pressure gauge c3 and pressure gauge d4, and pressure sensor c7 and pressure sensor 8 are arranged in parallel and lead toPiping connection is crossed, the position of 8 centre pressure sensor c7 and pressure sensor is provided with high-pressure solenoid valve c15 and high pressure hand-operated valveC18, high-pressure solenoid valve c15 and high pressure hand-operated valve c18 are connected in series.It preferably, can also include multiple pressure sensors, thisIt further include pressure sensor a5 and pressure sensor b6 in specific embodiment, pressure sensor a5 and pressure sensor b6 distinguishIt is connected with pressure gauge a1 and pressure gauge b2, pressure sensor a5 and pressure sensor b6 are connected on pipeline；Pressure sensor a5Be connected with high-pressure solenoid valve a13 and high pressure hand-operated valve a16 on pipeline between pressure sensor b6, high-pressure solenoid valve a13 andHigh pressure hand-operated valve a16 is fixedly connected with pipeline by pipe joint；Pipeline between pressure sensor b6 and pressure sensor c7On be fixedly connected with high-pressure solenoid valve b14 and high pressure hand-operated valve b18.Wherein the reading of pressure sensor 8 and pressure gauge d4 are madeFor the foundation initially adjusted, and pressure sensor c7, pressure sensor a5 and pressure sensor b6 and its corresponding pressure gauge are thenFor measure move back pressure and into pressure situation.
In addition, as shown in Fig. 2, into pressure device 51 include high-pressure plunger pump 28 and alcohol cup 30, before high-pressure plunger pump 28End is provided with high pressure pump valve 26 and is connected by pipeline with pressure measurement device 52.Preferably, high-pressure plunger pump 28 is fixed connectsIt is connected to stepper motor 29, drives high-pressure plunger pump 28 to carry out to pressure by stepper motor 29.Alcohol cup 30 and high-pressure plunger pump 28It is connected by hose, and is provided with the on-off of liquid feed valve control feed liquor on hose.
In addition, as shown in Fig. 2, pressure measurement device 52 includes mercury stereometer buret a22, differential pressure pick-up a24, isolationValve a19 and core chamber valve a31, mercury column interface automatic regulating system 21 and benefit mercury valve 33, core chamber valve a31 pass through with mercury valve 33 is mendedPipeline connection, the mercury stereometer lower end buret a22 are connect by pipeline with core chamber valve a31 with the middle position for mending mercury valve 33, everyIt is located at the upper end of mercury stereometer buret a22 from valve a19 and is connect with mercury stereometer buret a22 by pipeline, differential pressure pick-up a24Positioned at mercury stereometer buret a22 side and be firmly connected with it, differential pressure pick-up a24 is connected with the lower end of isolating valve a19It connects；The upper end of core chamber valve a31 is fixedly connected with rock core apparatus for placing 53 by pipeline, and isolating valve a19 passes through pipeline and air pressureIt detection device 50 and is connected into pressure device 51, core chamber valve a31 connect with core chamber a11 by pipeline.And preferably,It is solid by conduit coupling that the lower end of mercury stereometer buret a22 is provided with blow valve 35, blow valve 35 and mercury stereometer buret a22Fixed connection.
Preferably, pressure measurement device 52 may include multiple mercury stereometer burets, in this embodiment alsoIncluding another mercury stereometer buret b23, further include accordingly differential pressure pick-up b25, isolating valve b20 and core chamber valve b32 andMercury valve b34 is mended, mercury valve b34 is mended and is connected in parallel with mercury valve 33 is mended, core chamber valve b32 is connected with benefit mercury valve b34 by pipeline,The lower end of mercury stereometer buret b23 is connect by pipeline with core chamber valve b32 with the middle position for mending mercury valve b34, differential pressure sensingThe lower end of device b25 connection mercury stereometer buret b23 and the isolating valve b20, isolating valve b20 and isolating valve a19 of the upper end pass through pipeRoad is connected in parallel, core chamber valve b32 connection core chamber b12.Preferably, the lower end of mercury stereometer buret b23 is provided with blow valveB36 is simultaneously fixedly connected with it by conduit coupling.
In addition, rock core apparatus for placing 53 includes vacuum pump 40 and core chamber a11, vacuum pump 40 and core chamber a11 pass through pipeRoad connection, the upper end core chamber a11 are provided with evacuation valve 9, and evacuation valve 9 is fixedly connected with core chamber a11 by conduit coupling.It is excellentChoosing, vacuum pump 40 is provided with vacuum meter 37, vacuum vent valve 38 and vacuum pump valve 39, and vacuum meter 37 determines its vacuum degree, veryFor empty blow valve 38 for being vented, vacuum pump valve 39 is used to cut off the on-off of vacuum pump 37 Yu core chamber.
It preferably, also may include multiple core chamber, wherein core chamber matches use with mercury stereometer buret, this is specific realApplying in example further includes another core chamber b12, and core chamber b12 is connect with core chamber valve b32, and preferred core chamber valve b32It is connected in parallel with core chamber a11 by pipeline；It is logical that core chamber b12 is connected with evacuation valve b10, evacuation valve b10 and core chamber b12Piping connector is fixedly connected.Multiple core chamber, which are arranged, can carry out multiple groups measurement, improve work efficiency.
The workflow of present embodiment：Tested rock sample is first packed into core chamber a11 and core chamber b12, is then beatenEvacuation valve a9, the evacuation valve b10 above core chamber a11 and core chamber b12 are opened, core chamber valve a31, rock below core chamber are closedVentricle valve b32 opens and mends mercury valve 33, mends mercury valve b34, open vacuum pump valve 39, close vacuum vent valve 38, connects vacuum pump40 power supply vacuumizes, 15~after twenty minutes, open core chamber's valve a31, core chamber valve b32, mercury column interface automatic regulating systemMercury in 21 will enter core chamber a11 and core chamber b12 under atmospheric pressure, adjust mercury column interface automatic regulating system 21Make the comparable mercury value of atm difference of difference in height at that time at the top of initial mercury face position therein and core chamber.It is then shut off pumpingEmpty valve a9, evacuation valve b10 close vacuum pump 40, open vacuum pump blow valve 38.Mercury stereometer buret a22, mercury stereometer buretInitial mercury face in b23 can control the advance and retreat of high-pressure plunger pump 28 using microcomputer to adjust, and the foundation of adjusting is pressure sensor 8And the reading of pressure gauge 4, it opens and is mounted on pressure sensor a5, sensor b6, sensor c7, the high pressure between sensor aSolenoid valve a13, high-pressure solenoid valve b14, high-pressure solenoid valve c15 and high pressure hand-operated valve a16, high pressure hand-operated valve b17, high pressure handDynamic valve c18 is closed when the reading of adjusting to pressure sensor 8 is zero and is mended mercury valve 33, mends mercury valve b34.Then microcomputer can be utilizedControl high-pressure plunger pump 28 carries out pressure mercury and mercury ejection works.At this moment, when pressure sensor 8 measures mercury stereometer buret a22 and mercuryPressure when pressure in stereometer buret b23 at initial mercury face is relative pressure zero, at the top of core chamber a11 and core chamber b12It is absolute pressure zero.It can guarantee that pressure measurement all carries out under positive pressure in this way, moreover, working as pressure sensor 8 when mercury ejectionWhen retreating to relative pressure zero, core chamber a11 and core chamber's b12 top pressure can retreat to absolute pressure zero, ensure that mercury ejection songThe integrality of line.Due to the improvement in structure but also all tests carry out in a core chamber, the course of work ensure thatIntegrality.Real atmosphere pressure when according to measurement automatically adjusts the mercury face of mercury cup 49 to the height of core holding unit input endDegree.It may insure the difference in height that interface and core holding unit input end in mercury cup are kept constant, so that measurement result is moreIt is accurate to add.
The working principle of this specific embodiment：Rock core pore structure analyzer is measured using gravitational difference principle, rock coreIndoor top is higher than in mercury cubing pipe and the specific height in one, initial mercury face in mercury supplementing cup, this is highly equal to instrumentThe numerical value H of the atmospheric pressure indicated with height of mercury in location when use.Since atmospheric pressure all can with region, season, weather etc.It changes, therefore H can change with the change of atmospheric pressure, the present invention can be realized to be allowed to according to atmospheric pressure automatic adjustment HIt can be consistent with atmospheric pressure when experiment.Mercury supplementing cup bottom is connected by pipeline valve, and after mutual valve is opened, they are two-by-twoBetween will form U-shaped connection, pass through adjust mercury supplementing cup height, so that it may initial mercury in regulation and control mercury cubing pipeFace guarantees the H in instrument location when the difference in height at the top of initial mercury face and core chamber is equal to experiment.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not officeBe limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification andEnvironment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledgeIt is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present inventionIn scope of protection of the claims.