CN203259508U - Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber - Google Patents
Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber Download PDFInfo
- Publication number
- CN203259508U CN203259508U CN 201320313739 CN201320313739U CN203259508U CN 203259508 U CN203259508 U CN 203259508U CN 201320313739 CN201320313739 CN 201320313739 CN 201320313739 U CN201320313739 U CN 201320313739U CN 203259508 U CN203259508 U CN 203259508U
- Authority
- CN
- China
- Prior art keywords
- acoustic emission
- rubber plug
- fixed cover
- rubber circle
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Images
Abstract
The utility model discloses a coupling device capable of collecting acoustic emission signals in a tri-axial pressure chamber. A tri-axial instrument base is in the shape of an L-shaped communicating pipeline, a sensor signal line is placed in the L-shaped communicating pipeline, an acoustic emission signal line penetrates through the L-shaped communicating pipeline of the tri-axial instrument base, an inner waterproof rubber plug, an outer waterproof rubber plug and the acoustic emission signal line are fixed into a whole through glass cement, the inner waterproof rubber plug and the outer waterproof rubber plug are arranged at the two ends of the L-shaped communicating pipeline and equal in size, the inner waterproof rubber plug and the outer waterproof rubber plug are respectively filled into the L-shaped communicating pipeline, a protective fixing cover is sleeved with an acoustic emission sensor, a sensing face of the acoustic emission sensor is parallel with the surface of a sample, and a handle of the protective fixing cover is vertically erected on the latex film outer surface of the sample and fixed through an upper elastic rubber ring and a lower elastic rubber ring. The coupling device capable of collecting the acoustic emission signals in the tri-axial pressure chamber is simple in structure, convenient to operate and capable of monitoring conventional tri-axial compression of geotechnical materials and the acoustic emission signals in real time, wherein the acoustic emission signals are generated by grain breakage and microcrack growth in the shearing process.
Description
Technical field
The utility model belongs to rock-soil mechanics test field, more specifically relates to a kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure.Be exactly that the acoustic emission signal that produces in carrying out the triaxial test process of sample can receive by the calibrate AE sensor that directly sticks on sample latex film surface specifically, reach the purpose of acoustic emission signal Real-Time Monitoring.The utility model is applicable to the research of the properties such as the Particle Breakage, micro-crack extension of the materials such as coarse-grained soil, calcareous sand, rock.For the Particle Breakage of research understanding soil, the Crack Extension phenomenon of rock provide technical support.
Background technology
Triaxial apparatus is one of the most conventional most important experimental facilities of rock-soil mechanics research.Triaxial test is to measure the shearing strength of soil, a kind of test of stress-strain relation.In the test, generally adopting 4～5 right cylinder samples, (is minor principal stress σ at different constant ambient pressures respectively
3Lower), apply axial stress σ
1, the deviator stress that produce this moment is (σ
1-σ
3), at different deviator stress (σ
1-σ
3) the lower sample axial strain ε that measures
1And body strain ε
v, until sample is trimmed to destruction, try to achieve soil sample shearing strength, stress-strain relation and numerical simulation analysis model parameter.
Because coarse-grained soil in shear history the Particle Breakage phenomenon can occur, the technological means that records at present Particle Breakage also mainly is to obtain by a separating tests before and after the specimen test.The generation Elastic wave owing to can release energy in the time of Particle Breakage, the Elastic wave phenomenon of this generation are called acoustic emission (Acoustic Emission is called for short AE), sometimes are also referred to as the stress wave emission.For the true acoustic emission signal that can obtain to produce in the triaxial test process, must at first find a kind of simple in structure, easy operating, the device of stable performance can be applied to the acoustic emission test technology in the triaxial apparatus.The acoustic emission signal of only having the Particle Breakage that has obtained high-fidelity, other research work just become possibility.
The acoustic current lift-off technology is mainly used in the Non-Destructive Testing of metal material.And rock-soil material, particularly the acoustic emission of native dielectric material aspect research also is in the desk study stage.
Wuhan Inst. of Rock and Soil Mechanics, Chinese Academy of Sciences once adopted the ordinary triaxial test of acoustic emission monitoring calcareous sand, what they adopted is the outside that calibrate AE sensor is sticked on the triaxial cell, and the acoustic emission signal that produces in sample compression, the shear test process need to be passed through the media such as confined pressure water, pressure chamber and could be received by calibrate AE sensor.For Large-scale Triaxial Experiments, because the pressure chamber is large, pressure chamber's casing wall is thick, if calibrate AE sensor is sticked on the outside of triaxial cell, the Acoustic Emission Signal Energy loss will be more serious.Since the acoustic emission signal that Particle Breakage produces very a little less than, a large amount of signal attenuation will cause the acoustic emission signal distortion that receives.Therefore for fear of the decay of signal, guarantee the authenticity of the acoustic emission signal that gathers, calibrate AE sensor is directly sticked on the surface of sample, be very significant.
Summary of the invention
Above-mentioned deficiency for prior art, the purpose of this utility model is to be to provide a kind of coupling device of realizing calibrate AE sensor acoustic emission signal in pressure indoor monitoring triaxial test process, the technical matters that solves is: realized that calibrate AE sensor directly sticks on the surface of sample, guaranteed the authenticity of the acoustic emission signal of collection; Simultaneously can prevent oozing out of high confining pressure water, and then not affect normally carrying out of triaxial test; For convenience detach, do not affect the normal usage function of triaxial apparatus.Thereby realize that calibrate AE sensor can directly monitor the purpose of the acoustic emission signal that soil sample produces in fixed, shear history.The utility model is simple in structure, and is easy to operate, in mechanical property that can the Real-Time Monitoring rock-soil material, the shear history because the acoustic emission signal that Particle Breakage, micro-crack extension produce.Less to original triaxial apparatus repacking scope, can be for convenience detach, and other functions that do not affect triaxial apparatus are used.This device can satisfy confined pressure up to carrying out for a long time acoustic emission monitor(ing) work in the confined pressure environment of 1MPa, can satisfy the routine intravenous of most of soil, the demand of moving triaxial test, especially the large-scale routine intravenous of coarse-grained soil, Coarse Aggregate, stockpile, moving three axle Experimental on acoustic emissions research also can be satisfied the normal triaxial Experimental on acoustic emission research of part rock.
In order to realize above-mentioned purpose, the utility model adopts following technical measures:
A kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure, it is made of parts such as chamber body, piston rod, sample, base, latex film, L-type conducting pipeline, inner waterproofing rubber plug, outer water proof rubber plug, precompression plate, fastening bolt, upper India rubber circle, lower India rubber circle, protection fixed cover, calibrate AE sensor, acoustic emission signal line, acoustic emission acquisition systems.Its annexation is: triaxial cell's body and function is to install sample, base is the part of chamber body, and sample outside cover last layer latex film is placed on the triaxial apparatus base, and by O-ring seal sample is fixed between base and the piston rod, piston rod passes to axle power on the sample.Calibrate AE sensor is placed in the protection fixed cover, its sensitive surface outwardly, be close to sample, and be pressed abd fixed on the latex film of the sample outside by upper India rubber circle and lower India rubber circle together with the protection fixed cover, the India rubber circle is stuck in protection handle grooves place, fixed cover both sides.All there is a groove described protection fixed cover handle both sides, prevent rubber band in process of the test owing to sample deformation comes off.The joint that is used for the signal wire of connecting acoustic emission sensor enters from the L-type conducting pipeline of base upper surface, draws by the L-type pipeline opening that the base side is other, and is connected on the acoustic emission acquisition system.Described L-type conducting pipeline is positioned at base inside, and an end is communicated with the pressure chamber, and an end is communicated with outside the pressure chamber.Described outer water proof rubber plug is fixed into an integral body by glass cement and signal wire, outer water proof rubber plug is filled in the L-type conducting pipeline of base side.The precompression plate is parallel to be adjacent to outer water proof rubber plug, and 4 fastening bolts are evenly fastening, and about 4-6mm gets final product so that outer water proof rubber plug slowly advances.The inner waterproofing rubber plug is fixed into an integral body by glass cement and signal wire, pile water towards L-type conducting pipeline after, the inner waterproofing rubber plug is filled in the L-type conducting pipeline of base upper surface.Described outer water proof rubber plug is fixed by the precompressed of precompression plate, and the inner waterproofing rubber plug is fixed by the water pressure of confined pressure water, has jointly brought into play strong sealing effect.
It is characterized in that: the triaxial apparatus base is the L-type conducting pipeline (the triaxial apparatus base has been transformed the L-type conducting pipeline of diameter 38-42mm) of diameter 38-42mm, places 3-4 root sensor signal lines in L-type conducting pipeline, realizes the demand that acoustic emission signal gathers.The acoustic emission signal line passes the L-type conducting pipeline of triaxial apparatus base, is positioned at the inner waterproofing rubber plug of L-type conducting pipe ends, outer water proof rubber plug is fixed into an integral body by glass cement and acoustic emission signal line.Described inner waterproofing rubber plug and outer water proof rubber plug equal and opposite in direction, be round table-like, diameter 32-36mm on it, lower diameter 44-46mm, hole in its rubber plug center, its aperture 8-15mm, and it has been carried out vertical splitting forms round platform opposite opened structure.Inner waterproofing rubber plug and outer water proof rubber plug are filled in respectively in the L-type conducting pipeline, and its China and foreign countries' water proof rubber plug is fixed on the triaxial apparatus base side by the precompressed of precompression plate.Diameter is towards the L-type conduction pipe road junction of base upper surface, so that it is filled in the L-type pipeline on the described inner waterproofing rubber plug; Outer water proof rubber beyond the Great Wall diametral plane to the conduction pipe road junction of the L-type of chassis outer side, so that it is filled in the L-type pipeline.Upper India rubber circle and lower India rubber circle parallel sleeve are on the outside surface of the latex film of sample, and make India rubber circle and lower India rubber circle be positioned at the centre position of specimen height, calibrate AE sensor is enclosed within on the protection fixed cover, and make the calibrate AE sensor sensitive surface be parallel to specimen surface, protection fixed cover handle vertically stands on the latex film outside surface of sample, and fixes by upper India rubber circle, lower India rubber circle.
Described inner waterproofing rubber plug and outer water proof rubber plug are with round platform opposite opened structure, i.e. acoustic emission signal line placement the center is convenient in this kind rubber plug structure design; The precompression plate is comprised of precompression crab bolt hole and precompression plate central guiding port, precompression plate central guiding port can so that the acoustic emission signal line pass, and its diameter is less than the lower diameter of outer water proof rubber plug, the precompression plate passes precompression crab bolt hole by fastening bolt, and externally the water proof rubber plug is exerted pressure fastening; The inner waterproofing rubber plug is exerted pressure fastening by confined pressure water.
Described protection fixed cover is comprised of protection fixed cover chamber body and protection fixed cover handle, there is a breach at bright mouthful of place of body, protection fixed cover chamber, being convenient to the calibrate AE sensor signal wire extends out, it is slightly little that protection fixed cover height is compared the calibrate AE sensor height, so that the calibrate AE sensor sensitive surface exposure of laying, there is a groove protection fixed cover handle center position of protection fixed cover both sides, is used for inlaying India rubber circle, lower India rubber circle.
Described upper India rubber circle and lower India rubber snare are positioned at the center of specimen height on the latex film outside surface of sample, and two rubber bands are parallel at a distance of about 60mm, and go up the India rubber circle and lower India rubber circle is made by the ductility material.
Calibrate AE sensor protection fixed cover is the hollow cylinder body structure of a side opening, adopts aluminum to do, each corresponding handle of its both sides of edges.It protects fixed cover internal diameter greater than calibrate AE sensor diameter 1-1.5mm, wall thickness 3-5mm, and two handles are about 60mm, and wide about 10mm, thick about 5mm, its handle are positioned at the following 1-2mm of opening one side place, are screwed on the cover body wall.Described protection fixed cover chamber body one side has a wide height to be about the breach of 16 * 30mm, and this breach is so that the wire of calibrate AE sensor is drawn.Described protection fixed cover handle is about the 30mm place, and the groove of one 2 * 10mm is arranged.Lower India rubber circle, upper India rubber circle successively are enclosed within the latex film outside of sample, and sensor is placed in the protection fixed cover, and the parallel and specimen surface of sensor surface is fixed by upper and lower rubber band.Two handles of described protection fixed cover are parallel to the perpendicular line of sample.Described lower India rubber circle, the wide about 6mm of lower India rubber circle when fixation of sensor, is stuck in the groove of protection fixed cover, so just the fixed cover rolling is come off.After described protection fixed cover chamber body design height just guaranteed the calibrate AE sensor chucking, exposure 1～2mm was so that the India rubber circle approximately applies the pressure of 5kPa to sensor.
The described coupling device course of work of acoustic emission signal in the Acoustic radiating instrument monitoring triaxial test process that realizes is: so that the sensor signal wire terminal is passed from base L-type conducting pipeline external tapping, stretch out from the pipeline opening of chassis outer side.Then by glass cement signal wire is fixed in inner waterproofing rubber plug and the outer water proof rubber plug.Outer water proof rubber plug is filled in L-type conducting pipeline outer vent, again by the fixing outer water proof rubber plug of precompression plate parallel extrusion, and water filling in its L-type conducting pipeline, then the inner waterproofing rubber plug is filled in L-type insides of pipes mouth.Sample fixedly stands upright on the base, its sample outside cover has latex film, upper India rubber circle, lower India rubber snare in the latex film outside, calibrate AE sensor is enclosed within the protection fixed cover, parallel is attached on the sample, and two India rubber circles are stuck in the groove of two handles of protection fixed cover.The acoustic emission signal line is connected on the acoustic emission acquisition system, has covered the chamber body, can carry out relevant triaxial test.
The utlity model has following advantage and effect:
1) this coupling device has realized that successfully sensor directly sticks on specimen surface, carries out the purpose of the acoustic emission monitor(ing) of triaxial test, and more can guarantee the authenticity of acoustic emission signal.
2) the waterproof, seepage control parts in this coupling device, adopted simple two-stage hermetically-sealed construction, first order hermetically-sealed construction adopts the crush seal of the internal water proof rubber plug of the confined pressure water application of force, second level hermetically-sealed construction adopts the crush seal of the outer water proof rubber plug of precompression plate extruding, this apparatus structure is simple, is convenient to dismounting.When the applicant utilizes this device to carry out test, find the confined pressure water pressure that the sealing device can bear 2MPa.
3) the fixedly firmware that is used for fixation of sensor adopts the India rubber circle to fix, because the contractility of rubber band does not impact at radial deformation sample.The applicant once adopted the adhesive tape fixation of sensor, easily come off because adhesive tape is met the water capacity, and shrinkability was relatively poor, and result's adhesive tape that shows transparency is very large on the impact of the sample radial deformation in the triaxial shear test.
4) described protection fixed cover adopts aluminum to do, and has light effect, alleviates fixing pressure; The effect that has simultaneously electrostatic screening is so that the acoustic emission signal strong interference immunity.
The utility model is reasonable in design, and is simple in structure, and can be for convenience detach.Calibrate AE sensor is directly installed on inside, pressure chamber, conducting orifice by the triaxial apparatus base extracts sensor signal lines again, by the two-stage Sealing Technology, guarantee the strong leakproofness of L-type pipeline conducting orifice, thereby so that the acoustic emission signal that produces in the three axial compression contractings, shear test process can be in real time, truly monitor.For the acoustic emission research of the characteristics such as Particle Breakage, micro-crack extension is laid a good foundation.
The applicant utilizes this coupling device to carry out the large-scale triaxial shear test research of soft rock Coarse Aggregate of coupling acoustic emission, obtained the good technique effect, show that also this coupling device has possessed above-described advanced technology feature, can be used for carrying out the Experimental on acoustic emission research of the properties such as Particle Breakage, micro-crack extension of the materials such as coarse-grained soil, rock.Test and achievement are summarized as follows:
Utilize this coupling device to carry out the large-scale triaxial shear test research of soft rock Coarse Aggregate of coupling acoustic emission, the characteristics of Acoustic Emission when emphasis is explored soft rock Coarse Aggregate Particle Breakage.Figure a～figure b has provided the large-scale triaxial shear test typical case of the soft rock Coarse Aggregate result map of coupling acoustic emission, figure a～figure b can find out: sensor is placed on outside the pressure chamber, can cause a large amount of acoustic emission signal decay disappearances, test findings shows, under the same test conditions, sensor is placed on the Ring-down count ratio sensor of shearing overall process in the pressure chamber and is placed on high two orders of magnitude of the Ring-down count of shearing overall process outside the pressure chamber.Adopt the coupling device of developing to obtain the good technique effect, disclosed the characteristics of Acoustic Emission of soft rock Coarse Aggregate Particle Breakage.
Description of drawings
Fig. 1 is a kind of coupling device synoptic diagram that is implemented in the indoor collection acoustic emission signal of triaxial pressure.
Fig. 2 is a kind of plane elevation cross-sectional view of precompression plate.
Fig. 3 a is a kind of front elevation of water proof rubber plug.
Fig. 3 b is a kind of water proof rubber plug and acoustic emission signal line installation diagram.
Fig. 4 is that the secondary water-tight device is installed front elevation
Fig. 5 a is that a kind of calibrate AE sensor is installed front elevational schematic
Fig. 5 b is that synoptic diagram is looked on a kind of calibrate AE sensor installation right side
Fig. 6 a is a kind of vertical view of protective cover.
Fig. 6 b is the front elevation of a kind of protective cover and installation of sensors.
Figure a is the acoustic emission signal counting diagram that gathers in the pressure chamber.
Figure b is the acoustic emission signal counting diagram that gathers outside the pressure chamber.
Accompanying drawing acceptance of the bid score state as follows: 1-chamber body; The upper India rubber circle of 2-; India rubber circle under the 3-; The 4-sample; The 5-base; The 6-piston rod; 7-confined pressure water; The 8-latex film; 9-calibrate AE sensor (for example R6I-UC of PAC company type calibrate AE sensor); 10-protects fixed cover; 11-L type conducting pipeline; 12-precompression plate; The 13-fastening bolt; 14-inner waterproofing rubber plug; The outer water proof rubber plug of 15-; 16-acoustic emission acquisition system (such as DiSP system of PAC company); 17-acoustic emission signal line; 18-protection fixed cover groove; 19-protection fixed cover chamber body; 20-protection fixed cover handle; 21-precompression crab bolt hole; 22-precompression plate central guiding port; 23-glass cement (such as Switzerland's west card AP multifunctional glass glue).
Embodiment
Embodiment 1:
The below is described in further detail the utility model with reference to the accompanying drawings:
With reference to the accompanying drawings 1～Fig. 6 as can be known, this coupling device is by chamber body 1, sample 4, piston rod 6, base 5, latex film 8, L-type conducting pipeline 11, inner waterproofing rubber plug 14, outer water proof rubber plug 15, precompression plate 12, fastening bolt 13, upper India rubber circle 2, lower India rubber circle 3, protection fixed cover 10, calibrate AE sensor 9, acoustic emission signal line 17, acoustic emission acquisition system 16 consists of.Described protection fixed cover 10 is by protection fixed cover groove 18, and protection fixed chamber body 19 protects fixed handle 20 and consists of.Described precompression plate 12 is comprised of precompression crab bolt hole 21 and precompression plate central guiding port 22.Its annexation is: sample 4 is fixed on the triaxial apparatus base 5, and sample 4 outsides cover last layer latex film 8 is fixed on sample 4 between base 5 and the piston rod 6 by O-ring seal.Calibrate AE sensor 9 is placed in the protection fixed chamber body 19 of protection fixed cover 10, and its sensitive surface is fixed on the rubber membrane 8 of the sample outside by upper India rubber circle 2 and lower India rubber circle 3 outwardly.All there is a protection fixed cover groove 18 described protection fixed cover handle 20 both sides.Described protection fixed cover groove 18 is used for the effect of rubber band chucking protection fixed cover 10.The joint that is used for the signal wire 17 of connecting acoustic emission sensor 9 enters from the L-type conducting pipeline 11 of base upper surface, and 11 mouthfuls in the other L-type pipeline of base side is drawn.Described L-type conducting pipeline 11 is positioned at base 5 inside.Described outer water proof rubber plug 15 is fixed into an integral body by glass cement 23 and signal wire 17, outer water proof rubber plug 15 is filled in the L-type conducting pipeline 11 of base 5 sides.Precompression plate 12 is parallel, and to be adjacent to 15,4 fastening bolts 13 of outer water proof rubber plug evenly fastening, and about 5mm gets final product so that outer water proof rubber plug 15 slowly advances.Inner waterproofing rubber plug 14 is fixed into an integral body by glass cement 23 and signal wire 17, pile water to L-type conducting pipeline 11 after, inner waterproofing rubber plug 14 is filled in the L-type conducting pipeline 11 of base 5 upper surfaces.Chamber body 1 is fixed on the base 5, and acoustic emission signal line 17 is connected on the acoustic emission acquisition system 16, puts into confined pressure water 7 after stable, the triaxial test of the acoustic emission that can be coupled.Described outer water proof rubber plug 15 is fixed by 12 precompressed of precompression plate, and inner waterproofing rubber plug 14 is fixed by the water pressure of confined pressure water 7, has jointly brought into play strong sealing effect.
It is characterized in that: triaxial apparatus base 5 be diameter 38 40 or the joint of the L-type conducting pipeline 11(acoustic emission signal line 17 of 42mm at first through the L-type conducting pipeline 11 of the about 40mm of triaxial apparatus base 5 alterations), acoustic emission signal line 17 passes from top to bottom through L-type conducting pipeline 11, shown in Fig. 1, Fig. 5 a.Be positioned at the acoustic emission signal line 17 at place, L-type conducting pipeline 11 two ends, at first adopt the waterproof insulation tape wrapping, settle inner waterproofing rubber plug 14, outer water proof rubber plug 15 inside, seal fixing by glass cement 23 again, so that signal wire firmly is fixed on the rubber plug center, signal wire and rubber plug are become one.Subsequently inner waterproofing rubber plug 14, outer water proof rubber plug 15 are filled in the L-type conducting pipeline 11.Described inner waterproofing rubber plug 14, outer water proof rubber plug 15 are made by rubber shown in Fig. 3 a.Its version is a round platform opposite opened shown in Fig. 3 a, 3b, diameter 32-36mm on it, lower diameter 44-46mm, center bore 8-15mm.
Described inner waterproofing rubber plug 14 is with round platform opposite opened structure with outer water proof rubber plug 15, i.e. acoustic emission signal line 17 placement the center are convenient in this kind rubber plug structure design; Precompression plate 12 is comprised of precompression crab bolt hole 21 and precompression plate central guiding port 22, precompression plate central guiding port 22 can so that acoustic emission signal line 17 pass, and its diameter is less than the lower diameter of outer water proof rubber plug 15, the precompression plate passes precompression crab bolt hole 21 by fastening bolt 13, and externally the water proof rubber plug is exerted pressure fastening; Inner waterproofing rubber plug 14 is exerted pressure fastening by confined pressure water 7.
Described protection fixed cover 10 is comprised of protection fixed cover chamber body 1 and protection fixed cover handle 20, there is a breach at 19 bright mouthfuls of places of body, protection fixed cover chamber, being convenient to calibrate AE sensor signal wire 17 extends out, protection fixed cover chamber body 19 interior height are compared calibrate AE sensor 9 highly little 1-2mm, so that the calibrate AE sensor 9 sensitive surface exposures of laying, protection fixed cover handle 20 centre bits of protection fixed cover 10 both sides are equipped with a groove, are used for inlaying India rubber circle, lower India rubber circle.
Described upper India rubber circle 2 is enclosed within on latex film 8 outside surfaces of sample 4 with lower India rubber circle 3, be positioned at the center of sample 4 height, and upper India rubber circle 2 and lower India rubber circle 3 parallel about 60mm apart, and upper India rubber circle 2 is made by ductility material (such as aluminium, copper etc.) with lower India rubber circle 3.
In the present embodiment, chamber body 1 is isolating constructions with base 5, all is separate type between calibrate AE sensor 9, protection fixed cover 10 and upper India rubber circle 2, the lower India rubber circle 3.And calibrate AE sensor 9 is monolithic constructions with acoustic emission signal line 17, inner waterproofing rubber plug 14, outer water proof rubber plug 15 are monolithic constructions with acoustic emission signal line 17, all are separate type between the L-type conducting pipeline 11 of precompression plate 21, outer water proof rubber plug 15, base 5.
When using the utility model, in confined pressure water 7 and piston rod 6 actings in conjunction of chamber body 1 interior filling, sample 4 is produced σ
1Axle pressure, and σ
3Ambient pressure.Wherein the right cylinder sample 4 with latex film 8 wrappings places on the base 5.Calibrate AE sensor 9 is fixed on the surface of sample 4 by protection fixed cover 10 and upper India rubber circle 2, lower India rubber circle 3.Be used for connecting sensor signal wire 17 is connected to the external world through the conducting orifice of base 5 signal acquiring system 16.Wherein the base conducting orifice takes the two-stage safeguard procedures airtight.When piston rod 6 when 7 actings in conjunction of confined pressure water are on sample 4, the acoustic emission signal that sample produces is received by calibrate AE sensor 9, and is transferred in the acoustic emission acquisition system 16 by acoustic emission signal line 17.The utility model can be realized gathering the acoustic emission signal that produces in the monitoring triaxial test process, and the Particle Breakage of sample generation, the expansion of micro-crack are carried out dynamic, quantitative and harmless measurement, thereby obtained the acoustic emission data under the sample stress.
The device scope of application:
The utility model provides a kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure, is applicable to the Experimental on acoustic emission research of the properties such as Particle Breakage, micro-crack extension of the materials such as coarse-grained soil, rock in rock-soil mechanics field.
Claims (4)
1. coupling device that can be implemented in the indoor collection acoustic emission signal of triaxial pressure, it comprises L-type conducting pipeline (11), inner waterproofing rubber plug (14), outer water proof rubber plug (15), precompression plate (12), upper India rubber circle (2), lower India rubber circle (3), protection fixed cover (10), it is characterized in that: triaxial apparatus base (5) is the L-type conducting pipeline (11) of diameter 38-42mm, in L-type conducting pipeline (11), place 3-4 root sensor signal lines (17), acoustic emission signal line (17) passes the L-type conducting pipeline (11) of triaxial apparatus base (5), be positioned at the inner waterproofing rubber plug (14) at L-type conducting pipeline (11) two ends, outer water proof rubber plug (15) is fixed into an integral body by glass cement (23) and acoustic emission signal line (17), inner waterproofing rubber plug (14) and outer water proof rubber plug (15) equal and opposite in direction, be round table-like, diameter 32-36mm on it, lower diameter 44-46mm, inner waterproofing rubber plug (14) is filled in respectively in the L-type conducting pipeline (11) with outer water proof rubber plug (15), its China and foreign countries' water proof rubber plugs (15) are fixed on triaxial apparatus base (5) side by precompression plate (12) precompressed, the upper diameter of inner waterproofing rubber plug (14) is towards L-type conducting pipeline (11) mouth of base upper surface, the upper diametral plane of outer water proof rubber plug (15) is to conducting pipeline (11) mouth of the L-type of chassis outer side, upper India rubber circle (2) and lower India rubber circle (3) parallel sleeve are on the outside surface of the latex film (8) of sample (4), upper India rubber circle (2) and lower India rubber circle (3) are positioned at the centre position of sample (4), calibrate AE sensor (9) is enclosed within on the protection fixed cover (10), calibrate AE sensor sense (9) face of answering is parallel to sample (4) surface, protection fixed cover (10) handle vertically stands on latex film (8) outside surface of sample (4), by upper India rubber circle (2), lower India rubber circle (3) is fixing.
2. a kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure according to claim 1, it is characterized in that: described inner waterproofing rubber plug (14) is with round platform opposite opened structure with outer water proof rubber plug (15), precompression plate (12) is comprised of precompression crab bolt hole (21) and precompression plate central guiding port (22), precompression plate (12) central guiding port (22) passes acoustic emission signal line (17), diameter is less than the lower diameter of outer water proof rubber plug (15), precompression plate (12) passes precompression plate (12) bolt hole (21) by fastening bolt (13), and outer water proof rubber plug (15) is exerted pressure fastening; Inner waterproofing rubber plug (14) is exerted pressure fastening by confined pressure water (7).
3. a kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure according to claim 1, it is characterized in that: described protection fixed cover (10) is comprised of protection fixed cover chamber body (1) and protection fixed cover handle (20), protection fixed cover chamber body (19) has a breach, it is highly little that protection fixed cover chamber body (19) interior height is compared calibrate AE sensor (9), the calibrate AE sensor of laying (9) sensitive surface exposure, protection fixed cover handle (20) centre bit of protection fixed cover (10) both sides is equipped with a groove, inlays India rubber circle (2), lower India rubber circle (3).
4. a kind of coupling device that is implemented in the indoor collection acoustic emission signal of triaxial pressure according to claim 1, it is characterized in that: described upper India rubber circle (2) is parallel with lower India rubber circle (3) at a distance of 60mm, and upper India rubber circle (2) is made by ductile material with lower India rubber circle (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313739 CN203259508U (en) | 2013-06-01 | 2013-06-01 | Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320313739 CN203259508U (en) | 2013-06-01 | 2013-06-01 | Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203259508U true CN203259508U (en) | 2013-10-30 |
Family
ID=49472060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320313739 Withdrawn - After Issue CN203259508U (en) | 2013-06-01 | 2013-06-01 | Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203259508U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323537A (en) * | 2013-06-01 | 2013-09-25 | 中国科学院武汉岩土力学研究所 | Coupling device for realizing acquisition of acoustic emission signals in triaxial pressure cell |
| CN105158139A (en) * | 2015-08-18 | 2015-12-16 | 贵州大学 | Improved structure of triaxial seepage device |
| CN106706761A (en) * | 2017-01-03 | 2017-05-24 | 南京航空航天大学 | Non-contact strain field and acoustic emission combined split type measuring system and method |
| CN109100243A (en) * | 2018-08-22 | 2018-12-28 | 温州大学瓯江学院 | A kind of reinforced direct shear test detection method |
| CN109142536A (en) * | 2018-10-17 | 2019-01-04 | 中南大学 | High-precision rock interior damages real-time locating and detecting device |
-
2013
- 2013-06-01 CN CN 201320313739 patent/CN203259508U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103323537A (en) * | 2013-06-01 | 2013-09-25 | 中国科学院武汉岩土力学研究所 | Coupling device for realizing acquisition of acoustic emission signals in triaxial pressure cell |
| CN105158139A (en) * | 2015-08-18 | 2015-12-16 | 贵州大学 | Improved structure of triaxial seepage device |
| CN106706761A (en) * | 2017-01-03 | 2017-05-24 | 南京航空航天大学 | Non-contact strain field and acoustic emission combined split type measuring system and method |
| CN109100243A (en) * | 2018-08-22 | 2018-12-28 | 温州大学瓯江学院 | A kind of reinforced direct shear test detection method |
| CN109100243B (en) * | 2018-08-22 | 2021-02-26 | 温州大学瓯江学院 | Detection method for reinforced direct shear test |
| CN109142536A (en) * | 2018-10-17 | 2019-01-04 | 中南大学 | High-precision rock interior damages real-time locating and detecting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103323537B (en) | Coupling device for realizing acquisition of acoustic emission signals in triaxial pressure cell | |
| CN203259508U (en) | Coupling device capable of collecting acoustic emission signals in tri-axial pressure chamber | |
| CA2928118C (en) | Device and method using infrared radiation to observe coal rock fracture development process | |
| CN104614249B (en) | Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information | |
| CN102359861B (en) | Device and method for testing wind pressure on surface of building structure | |
| CN107576774B (en) | Coal seam containing gas mechanical characteristic analogue experiment method under uniaxial compression | |
| CN203630127U (en) | Burst coal dust gas two-phase mobilization force measurement and experiment device | |
| CN107515289B (en) | Coal and gas outburst simulation test device | |
| CN109613119A (en) | A kind of acoustic-electric seeps quasi- triaxial cell and the test method of comprehensive monitoring | |
| CN103245770A (en) | Electroosmosis-vacuum-loading combined consolidometer | |
| CN103969406A (en) | Paste filling multi-field coupling researching device and application method thereof | |
| CN105043891A (en) | Muddy water fracturing pressure testing device and method used for shield tunnel | |
| CN102621228A (en) | Acoustic and electric parameter measuring device used for loading procedure of gas-containing coal bodies | |
| CN205003029U (en) | A muddy water splitting pressure test device for shield tunnel | |
| CN104181002B (en) | A kind of uniform hydraulic analogue charger for tunnel structural model test and method | |
| CN103927913B (en) | A kind of deep formation environment carbon dioxide geological stores experimental system for simulating | |
| CN114034623A (en) | Stress-seepage coupling evolution visualization system under action of non-uniform load | |
| CN203479636U (en) | Device for measuring displacement pressure of gas storage cap rock | |
| CN103412096B (en) | Multi-parameter method for monitoring coal and gas outburst under condition of multi-field coupling | |
| CN207689276U (en) | A kind of equidistance line marking device for concrete cylindrical sample strain testing | |
| CN105699211B (en) | A kind of test method of rock seepage-pipe coupling model shear rheology test | |
| CN202275042U (en) | Device for measuring gas permeability of soil in situ | |
| CN209841563U (en) | Soil body stress strain analogue test device around enlarged footing stock | |
| CN207832109U (en) | A kind of knock test plate shape test specimen displacement measuring device | |
| CN202661301U (en) | All-weather underground radon gas sampling device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150408 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20131030 Effective date of abandoning: 20150408 |
|
| RGAV | Abandon patent right to avoid regrant |