CN110398449B - Rock core holder and rock physical parameter testing device - Google Patents
Rock core holder and rock physical parameter testing device Download PDFInfo
- Publication number
- CN110398449B CN110398449B CN201810374652.XA CN201810374652A CN110398449B CN 110398449 B CN110398449 B CN 110398449B CN 201810374652 A CN201810374652 A CN 201810374652A CN 110398449 B CN110398449 B CN 110398449B
- Authority
- CN
- China
- Prior art keywords
- core
- displacement
- cross beam
- measuring
- fixed
- 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.)
- Active
Links
- 239000011435 rock Substances 0.000 title claims abstract description 52
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 126
- 238000005259 measurement Methods 0.000 claims abstract description 35
- 239000012530 fluid Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000011888 foil Substances 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Dispersion Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a core holder. The method comprises the following steps: the displacement testing device comprises a fixed disc, a cross beam and a displacement testing part; wherein, the fixed disk includes: the first fixed disk and the second fixed disk are used for clamping a rock core to be tested between the first fixed disk and the second fixed disk; the cross member includes: the first cross beam is detachably mounted on the surface of the first fixed disk, and the second cross beam is detachably mounted on the surface of the second fixed disk; the displacement measuring section includes: a first displacement measuring section and a second displacement measuring section; the first displacement measuring portion and the second displacement measuring portion are both connected between the first beam and the second beam. Above-mentioned core holder not only can play the effect of centre gripping core at the actual measurement in-process of rock physical parameter, can also measure the axial displacement of the core that awaits measuring, and the function is various.
Description
Technical Field
The invention relates to the field of rock physics, in particular to a rock core clamp holder and a rock physical parameter testing device.
Background
The research on the physical properties of the rock is of great significance in the fields of energy exploration, geological disasters, environmental protection, monitoring and the like. The physical parameters of the rock mainly include mechanical, thermal, electrical, acoustic and radiological parameters of the rock. The measurement of the above-mentioned petrophysical parameters is mainly carried out in laboratories, and the rock samples used for laboratory measurements are generally referred to as "cores". To facilitate the measurement of the above parameters, the core needs to be held by a core holder.
During actual measurement, the core is typically machined to be cylindrical; the fixing principle of the clamp holder in the prior art is as follows: the clamp holder is provided with an annular fixing device with an adjustable inner diameter, the core is inserted into the annular fixing device, and then the inner diameter of the annular fixing device is adjusted, so that the middle part of the cylindrical core is just clamped in the annular fixing device, and two ends of the cylindrical core are exposed outside, and the measuring device can measure corresponding parameters through two ends of the core.
However, the clamp in the prior art only plays a role in clamping the rock core in the process of measuring the rock physical parameters, and has a single function.
Disclosure of Invention
The invention provides a core holder, which is used for solving the problem of single function of the holder in the prior art.
The invention provides a core holder, comprising:
the displacement testing device comprises a fixed disc, a cross beam and a displacement testing part;
wherein, the fixed disk includes: the first fixed disk and the second fixed disk are used for clamping a rock core to be tested between the first fixed disk and the second fixed disk;
the cross member includes: the first cross beam is detachably mounted on the surface of the first fixed disk, and the second cross beam is detachably mounted on the surface of the second fixed disk; the first cross beam and the second cross beam are both parallel to the end face of the rock core to be tested;
the displacement measuring section includes: a first displacement measuring section and a second displacement measuring section; first displacement measurement portion with second displacement measurement portion all connects first crossbeam with between the second crossbeam, first displacement measurement portion with second displacement measurement portion all with the axial direction parallel of the rock core that awaits measuring is used for measuring the axial displacement of the rock core that awaits measuring.
Optionally, the core holder further comprises:
a cantilever bridge and a radial strain gage;
the cantilever bridge sleeve is established on the lateral wall of the core that awaits measuring, radial foil gage is installed on the cantilever bridge, be used for measuring the radial displacement of core that awaits measuring.
Optionally, the first displacement testing unit includes: a first rod-like housing, a first measurement core and a first displacement sensor;
wherein, first shaft-like shell is fixed the one end of second crossbeam, first shaft-like shell with the second crossbeam is perpendicular, first displacement sensor installs on the inner wall of first shaft-like shell, the one end of first measurement core is fixed the one end of first crossbeam, the other end of first measurement core is portable to be inserted and to be located in the first shaft-like shell, first measurement core with first displacement sensor cooperation is used the measurement the axial displacement of the core that awaits measuring.
Optionally, the second displacement testing part includes: a second rod-shaped housing, a second measuring core and a second displacement sensor;
the second rod-shaped shell is fixed to the other end of the second cross beam, the second rod-shaped shell is perpendicular to the second cross beam, the second displacement sensor is installed on the inner wall of the second rod-shaped shell, one end of the second measuring core is fixed to the other end of the first cross beam, the other end of the second measuring core is movably inserted into the second rod-shaped shell, and the second measuring core and the second displacement sensor are matched to measure axial displacement of the to-be-measured core.
Optionally, a first fixing hole and a second fixing hole are formed at two ends of the first cross beam, and a third fixing hole and a fourth fixing hole are formed at two ends of the second cross beam;
one end of the first measuring core is fixed on the first cross beam through the first fixing hole, and one end of the second measuring core is fixed on the first cross beam through the second fixing hole; one end of the first rod-shaped shell is fixed on the second cross beam through a third fixing hole, and one end of the second rod-shaped shell is fixed on the second cross beam through a fourth fixing hole.
Optionally, a first mounting hole is formed in the first cross beam, and a second mounting hole is formed in the second cross beam; the first mounting hole and the second mounting hole are used for mounting rock physical parameter testing equipment.
Optionally, the fixed disk is provided with a fluid channel, and the fluid channel is used for injecting fluid into the core to be tested.
Optionally, the above clamp further comprises: a rubber sleeve;
the rubber sleeve is sleeved on the outer wall of the core to be tested.
Optionally, the length of the core to be tested is 1 inch, 2 inches or 9 inches.
The invention provides a rock physical parameter testing device, which comprises the rock core clamp holder, a piezoelectric transducer, an electrode and an acoustic pressure plate; wherein, piezoelectric transducer, electrode and sound pressure board connect gradually, the sound pressure board is installed on the fixed disk.
The core holder is provided with the first fixed disk and the second fixed disk and is used for holding a core to be measured between the first fixed disk and the second fixed disk; secondly, arranging a first cross beam and a second cross beam, fixing the first cross beam on the surface of the first fixed disk, and fixing the second cross beam on the surface of the second fixed disk; secondly, arranging a first displacement measuring part and a second displacement measuring part, and connecting the first displacement measuring part and the second displacement measuring part between the first cross beam and the second cross beam for measuring the axial displacement change of the core to be measured; the rock core clamp holder can play a role in clamping the rock core and can measure the axial displacement of the rock core to be measured in the actual measurement process of the rock physical parameters, and the function is diversified.
Drawings
Figure 1 is a schematic structural view of a first embodiment of a core holder according to the present invention;
FIG. 2 is a schematic structural view of a first fixing tray provided in the present invention;
FIG. 3 is a schematic structural view of the present invention illustrating the fixing of a core to be tested by a rubber sleeve;
figure 4 is a schematic structural view of a second embodiment of a core holder provided by the invention;
figure 5 is a schematic structural view of a third embodiment of a core holder provided by the invention;
figure 6 is a cross-sectional structural view of a fourth embodiment of a core holder provided in accordance with the present invention;
fig. 7 is a schematic structural diagram of an embodiment of the rock physical parameter testing device provided by the invention.
Description of reference numerals:
10: a first fixed disk;
11: a second fixed disk;
12: a core to be tested;
13: a first cross member;
14: a second cross member;
15: a first displacement measuring section;
16: a second displacement measuring section;
17: a tray body;
18: a holding portion;
19: a rubber sleeve;
20: a cantilever bridge;
21: a radial strain gage;
151: a first rod-like housing;
152: a first measurement core;
161: a second rod-shaped housing;
162: a second measurement core;
131: a first fixing hole;
132: a second fixing hole;
141: a third fixing hole;
142: a fourth fixing hole;
101: a first fluid channel;
111: a second fluid passage;
22: a first piezoelectric transducer;
23: a first electrode;
24: a first acoustic platen;
25: a second sound pressure plate;
26: a second electrode;
27: a second piezoelectric transducer.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it should be construed that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The clamp in the prior art only plays a role in clamping a rock core in the process of measuring the physical parameters of the rock, and has a single function. The holder provided by the invention not only plays a role in holding the rock core in the process of testing the physical parameters of the rock, but also can measure the axial strain and the radial strain of the rock core under the triaxial stress loading, and has the advantages of simple structure and multiple functions.
Fig. 1 is a schematic structural view of a first embodiment of the core holder according to the present invention, and as shown in fig. 1, the core holder according to the present embodiment includes a fixed plate, a beam, and a displacement testing portion.
Wherein, the fixed disk includes: the core testing device comprises a first fixed disk 10 and a second fixed disk 11, wherein the first fixed disk 10 and the second fixed disk 11 are used for clamping a core 12 to be tested between the first fixed disk 10 and the second fixed disk 11;
wherein, the crossbeam includes: a first beam 13 and a second beam 14, wherein the first beam 13 is detachably mounted on the surface of the first fixed disk 10, and the second beam 14 is detachably mounted on the surface of the second fixed disk 11; the first beam 13 and the second beam 14 are both parallel to the end face of the core 12 to be tested;
wherein the displacement measuring section includes: a first displacement measuring section 15 and a second displacement measuring section 16; the first displacement measuring portion 15 and the second displacement measuring portion 16 are both connected between the first beam 13 and the second beam 14; the first displacement measuring part 15 and the second displacement measuring part 16 are parallel to the axial direction of the core 12 to be measured, and are used for measuring the axial displacement of the core to be measured.
It should be noted that: the core holder provided by the embodiment is suitable for cylindrical cores.
As shown in fig. 1, the first fixed disk 10 and the second fixed disk 11 have the same structure, and when the holder is required to hold a core, the first fixed disk 10 and the second fixed disk 11 are symmetrically supported against two ends of a core 12 to be measured.
Alternatively, the first fixed disk 10 and the second fixed disk 11 may be configured as shown in fig. 2, where the first fixed disk 10 shown in fig. 2 includes: the tray body 17 is fixedly connected with the propping part 18, the outer diameter of the propping part 18 is smaller than that of the tray body 17 and is matched with the diameter of the core 12 to be tested, and the first fixed tray 10 is contacted with the core 12 to be tested through the propping part 18.
The structure of the second fixed disk 11 is similar to that of the first fixed disk 10, and is not described in detail herein.
In the case of the fixed disks shown in fig. 2, one achievable way of clamping the core between the first fixed disk 10 and the second fixed disk 11 is, as shown in fig. 3:
above-mentioned core holder still includes: a cylindrical rubber sleeve 19; the inner diameter of the cylindrical rubber sleeve 19 is matched with the outer diameter of the core 12 to be measured, so that the outer wall of the core 12 to be measured is tightly attached to the rubber sleeve 19, and fluid is prevented from flowing between the rubber sleeve 19 and the core 12 to be measured.
Wherein, the length of cylindric rubber sleeve 19 is longer than the length of the core 12 that awaits measuring, see arrow in fig. 3 and show, after placing the core 12 that awaits measuring in cylindric rubber sleeve 19, the dotted line shows the position of the core 12 that awaits measuring in cylindric rubber sleeve 19, can fill in cylindric rubber sleeve 19 both ends with the portion 18 that holds of the top of first fixed disk 10 and the portion that holds of the top of second fixed disk 11, then with the iron wire respectively with the portion 18 that holds of the top of cylindric rubber sleeve 19 and first fixed disk 10, the portion that holds of the top of cylindric rubber sleeve 19 and second fixed disk 11 is fixed to the core 12 centre gripping that awaits measuring is between first fixed disk 10 and second fixed disk 11.
It should be noted that: the manner of clamping the core between the first fixed disk 10 and the second fixed disk 11 includes, but is not limited to, the above-described manner.
Alternatively, the first fixed disk 10 and the second fixed disk 11 may be ceramic fixed disks to function as an electrical isolation.
One way to realize that the first cross beam 13 is mounted on the first fixing plate 10 is as follows: the centers of the first cross member 13 and the first fixed disk 10 are aligned, and then the first cross member 13 and the first fixed disk 10 are fixed by means of screw-coupling. Alternatively, the threads on the first cross member 13 and the first fixed disk 10 may be disposed at any position convenient for installation, and the present invention is not limited thereto.
The implementation manner of the second beam 14 mounted on the second fixed disk 11 is similar to the manner of the first beam 13 mounted on the first fixed disk 10, and the comparison of the present invention is not repeated.
Referring to fig. 1, the first displacement measuring part 15 and the second displacement measuring part 16 are symmetrically connected between the first beam 13 and the second beam 14, and when a core is loaded with radial confining pressure, the core is subjected to the action of the radial confining pressure and then extends in the axial direction, i.e. generates positive axial displacement; the first displacement measuring portion 15 and the second displacement measuring portion 16 may be used to measure the axial positive displacement, from which the user may further analyze the relationship of the applied radial confining pressure and the axial displacement.
When axial stress is loaded on the core, the core can be axially shortened under the action of the axial stress, and axial negative displacement is generated; the first displacement measuring portion 15 and the second displacement measuring portion 16 may be used to measure the axial negative displacement from which the user may further analyze the relationship of the applied axial stress and the axial displacement.
The core holder provided by the embodiment is provided with the first fixed disk and the second fixed disk, and is used for holding a core to be measured between the first fixed disk and the second fixed disk; secondly, arranging a first cross beam and a second cross beam, fixing the first cross beam on the surface of the first fixed disk, and fixing the second cross beam on the surface of the second fixed disk; secondly, arranging a first displacement measuring part and a second displacement measuring part, and connecting the first displacement measuring part and the second displacement measuring part between the first cross beam and the second cross beam for measuring the axial displacement change of the core to be measured; the rock core clamp holder can play a role in clamping the rock core and can measure the axial displacement of the rock core to be measured in the actual measurement process of the rock physical parameters, and the function is diversified.
Fig. 4 is a schematic structural diagram of a second embodiment of the core holder according to the present invention, where, in order to measure the radial displacement of the core 12 to be measured, on the basis of the above embodiments, the core holder according to the present embodiment further includes: a cantilever bridge 20 and a radial strain gage 21.
Wherein, cantilever bridge 20 is used for the cover to establish on the lateral wall of the rock core 12 that awaits measuring, radial foil gage 21 is installed on cantilever bridge 20, is used for measuring the radial displacement of the rock core 12 that awaits measuring changes.
It should be noted that: fig. 4 shows only the structure of the cantilever bridge 20 and the radial strain gauge 21, and other structural schematic diagrams can refer to fig. 1 to 3.
Alternatively, referring to fig. 4, the cantilever bridge 20 may be configured as a ring, and the ring-shaped cantilever bridge 20 may be sleeved on the outer wall of the core 12 to be tested; if the core 12 to be tested is clamped between the first fixed disk 10 and the second fixed disk 11 by the rubber sleeve 19 as shown in fig. 2, the annular cantilever bridge 20 is sleeved on the outer wall of the rubber sleeve 19.
Alternatively, the radial strain gauge 21 may be mounted on the cantilever bridge 20 in the manner shown in fig. 4, and when the core is loaded with radial confining pressure, the core is subjected to the radial confining pressure and then radially shortens, that is, radial negative displacement is generated; radial strain gages 21 mounted on cantilever bridge 20 may be used to measure this radial negative displacement from which a user may further analyze the relationship of the applied radial confining pressure and radial displacement.
When axial stress is loaded on the core, the core can radially extend under the action of the axial stress, and radial positive displacement is generated; radial strain gages 21 mounted on cantilever bridge 20 may be used to measure this positive radial displacement from which a user may further analyze the relationship of the applied axial stress to the radial displacement.
The core holder that this embodiment provided, its theory of realization and technological effect are similar with above-mentioned embodiment, on the basis of above-mentioned embodiment, through setting up cantilever bridge and radial foil gage, establish cantilever bridge cover on the lateral wall of the core that awaits measuring, install radial foil gage on cantilever bridge for above-mentioned core holder not only can measure the core axial displacement that awaits measuring, can also measure the radial displacement of the core that awaits measuring, makes the function of above-mentioned core holder more diversified.
Fig. 5 is a schematic structural view of a third embodiment of the core holder according to the present invention, and as a way of realizing the structure of the first displacement measuring portion 15, as shown in fig. 5, in the core holder according to the present embodiment, the first displacement measuring portion 15 includes: a first rod housing 151, a first measuring core 152 and a first displacement sensor.
The first rod-shaped housing 151 is fixed at one end of the second beam 14, the first rod-shaped housing 151 is perpendicular to the second beam 14, the first displacement sensor 153 is installed on the inner wall of the first rod-shaped housing 151, one end of the first measurement core 152 is fixed at one end of the first beam 13, the other end of the first measurement core 152 is movably inserted into the first rod-shaped housing 151, and the first measurement core 152 and the first displacement sensor 153 are used in a matched manner to measure the axial displacement of the core 12 to be measured.
Alternatively, the first rod-shaped housing 151 may be detachably fixed to one end of the second fixed disk 11 by a screw connection, or may be fixed to one end of the second fixed disk 11 by welding, which is not limited in the present invention.
Alternatively, one end of the first measuring core 152 may be detachably fixed to one end of the first cross member 13 by a threaded connection, or may be fixed to one end of the first cross member 13 by welding, which is not limited in the present invention.
The other end of the first measuring core 152 is movably inserted into the first rod-shaped housing 151, and when the core 12 to be measured extends or shortens in the axial direction, the other end of the first measuring core 152 moves up and down in the first rod-shaped housing 151, and the moving up and down process is detected by the first displacement sensor, so that the purpose of recording the axial displacement of the core 12 to be measured in real time is achieved.
As one realizable manner of the structure of the second displacement measuring section 16, the second displacement measuring section 16 includes: a second rod-shaped housing 161, a second measuring core 162, and a second displacement sensor;
the second rod-shaped shell 161 is fixed at the other end of the second beam 14, the second rod-shaped shell 161 is perpendicular to the second beam 14, the second displacement sensor is installed on the inner wall of the second rod-shaped shell 161, one end of the second measurement core 162 is fixed at the other end of the first beam 13, the other end of the second measurement core 162 is movably inserted into the second rod-shaped shell 161, and the second measurement core 162 and the second displacement sensor are matched to measure the axial displacement of the core 12 to be measured.
Alternatively, the second rod-shaped housing 161 may be detachably fixed to the other end of the second fixed disk 11 by a screw connection, or may be fixed to the other end of the second fixed disk 11 by welding, which is not limited in the present invention.
Alternatively, one end of the second measuring core 162 may be detachably fixed to the other end of the first cross member 13 by a threaded connection, or may be fixed to the other end of the first cross member 13 by welding, which is not limited in the present invention.
Because the first displacement measuring part 15 and the second displacement measuring part 16 are both used for measuring the axial displacement of the core 12 to be measured, in order to make the measurement result more accurate, the measurement results of the first displacement measuring part 15 and the second displacement measuring part 16 can be averaged, so that the axial displacement data of the core 12 to be measured obtained by a user is more reliable, and the accuracy of the test result is improved.
It should be noted that: fig. 5 is a schematic diagram showing only a part of the structure in the present embodiment, and other structures can refer to fig. 1 to 4.
The core holder according to the present embodiment is similar to the above-described embodiments in the principle and technical effects thereof, and is based on the above-described embodiments by providing a first displacement test section including a first rod-shaped housing, a first measurement core, and a first displacement sensor; the second displacement test section is configured to include: a second rod-shaped housing, a second measuring core and a second displacement sensor; the measuring results of the first displacement measuring part and the second displacement measuring part can be averaged, so that the axial displacement data of the core to be measured, which is obtained by a user, is more reliable, and the accuracy of the test result is improved.
Fig. 6 is a schematic cross-sectional structure view of a fourth embodiment of the core holder according to the present invention, in order to better fix the first measuring core 152 and the second measuring core 162 between the first beam 13 and the second beam 14, the first beam 13 provided in this embodiment is provided with a first fixing hole 131 and a second fixing hole 132 at both ends thereof, and the second beam 14 provided in both ends thereof is provided with a third fixing hole 141 and a fourth fixing hole 142.
One end of the first measuring core 152 is fixed to the first beam 13 through the first fixing hole 131, and one end of the second measuring core 162 is fixed to the first beam 13 through the second fixing hole 132.
One end of the first rod housing 151 is fixed to the second beam 14 through a third fixing hole 141, and one end of the second rod housing 161 is fixed to the second beam 14 through a fourth fixing hole 142.
Alternatively, the first fixing hole 131 and the second fixing hole 132 may be configured as shown in fig. 6, and the size of the first fixing hole 131 is matched with the size of one end of the first measuring core 152, so that one end of the first measuring core 152 is just inserted into the first fixing hole 131, and the first measuring core 152 may be detachably fixed in the first fixing hole 131 by a screw connection or the like.
Here, the second measuring core 162 and the second fixing hole 132 are fixed in a similar manner to the first measuring core 152 and the first fixing hole 131.
In order to measure other rock physical parameters of the core 12 to be measured while applying the triaxial stress, in the core holder provided in this embodiment, a first mounting hole is provided on the first beam 13, and a second mounting hole is provided on the second beam 14; the first mounting hole and the second mounting hole are used for mounting rock physical parameter testing equipment.
In order to measure the variation of the physical parameters of other rocks of the core 12 to be measured under different void pressures, the core holder provided by the embodiment is provided with a fluid channel on the fixed disc, and the fluid channel is used for injecting fluid into the core 12 to be measured.
The fluid channel on the first fixed disk 10 is a first fluid channel 101, the fluid channel on the second fixed disk 11 is a second fluid channel 111, the first fluid channel 101 and the second fluid channel 111 are communicated with an external pipeline, and the external pipeline can inject fluid into the core 12 to be tested through the first fluid channel 101 and the second fluid channel 111, so as to provide pore pressure for the core 12 to be tested.
Optionally, the core holder provided by the present embodiments is suitable for cylindrical cores having a length of 1 inch, 2 inches, or 9 inches.
The core holder that this embodiment provided sets up first fixed orifices and second fixed orifices through the both ends at first crossbeam, is provided with third fixed orifices and fourth fixed orifices at the both ends of second crossbeam for fixed inseparabler between displacement measurement portion and the crossbeam. Through set up first mounting hole on first crossbeam, set up the second mounting hole on the second crossbeam, be convenient for more above-mentioned core holder and other test equipment's be connected. Through be provided with fluid passage on the fixed disk, can provide pore pressure to the core that awaits measuring, be convenient for study core that awaits measuring under different pore pressure, other rock physical parameter's the change condition.
FIG. 7 is a schematic structural diagram of an embodiment of the rock physical parameter testing device provided by the invention, and as shown in FIG. 7, the rock physical parameter testing device provided by the embodiment comprises the holder, the piezoelectric transducer, the electrode and the acoustic pressure plate in the above embodiment;
wherein the piezoelectric transducers comprise a first piezoelectric transducer 22 and a second piezoelectric transducer 27; the electrodes include a first electrode 23 and a second electrode 26; the acoustic platen includes a first acoustic platen 24 and a second acoustic platen 25.
Wherein, the first piezoelectric transducer 22, the first electrode 23, the first acoustic pressure plate 24, the core clamper, the second acoustic pressure plate 25, the second electrode 26 and the second piezoelectric transducer 27 are connected in sequence.
The resistivity of the core 12 to be measured can be measured by the cooperation of the piezoelectric transducer and the electrode. The piezoelectric transducer and acoustic platen configuration can be used to measure the acoustic velocity of the strip core.
The rock physical parameter testing device provided by the embodiment can be used for measuring the axial displacement and the radial displacement of the rock while loading the triaxial stress; the device can also measure the resistivity and the sound wave speed of the rock while loading the triaxial stress, and has simple structure and multiple functions.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A core holder, comprising:
the displacement measuring device comprises a fixed disc, a cross beam and a displacement measuring part;
wherein, the fixed disk includes: the first fixing disc and the second fixing disc are used for clamping a rock core to be tested between the first fixing disc and the second fixing disc; wherein, first fixed disk includes: a tray body and a top holding part; the first fixed disc is contacted with the rock core to be detected through the jacking part; the second fixed disk is the same as the first fixed disk;
the cross member includes: the first cross beam is detachably mounted on the surface of the first fixed disk, and the second cross beam is detachably mounted on the surface of the second fixed disk; the first cross beam and the second cross beam are both parallel to the end face of the rock core to be tested;
the displacement measuring section includes: a first displacement measuring section and a second displacement measuring section; the first displacement measuring part and the second displacement measuring part are connected between the first cross beam and the second cross beam, and are parallel to the axial direction of the core to be measured and used for measuring the axial displacement of the core to be measured; the axial displacement of the core to be measured is the average value of the measurement results of the first displacement measurement part and the second displacement measurement part;
further comprising:
a cantilever bridge and a radial strain gage;
the cantilever bridge is sleeved on the side wall of the core to be measured, and the radial strain gauge is installed on the cantilever bridge and used for measuring the radial displacement of the core to be measured;
the first cross beam is provided with a first mounting hole, and the second cross beam is provided with a second mounting hole; the first mounting hole and the second mounting hole are used for mounting rock physical parameter testing equipment;
and the fixed disc is provided with a fluid channel, and the fluid channel is used for injecting fluid into the rock core to be tested.
2. The gripper according to claim 1, wherein the first displacement measuring section includes: a first rod-like housing, a first measurement core and a first displacement sensor;
wherein, first shaft-like shell is fixed the one end of second crossbeam, first shaft-like shell with the second crossbeam is perpendicular, first displacement sensor installs on the inner wall of first shaft-like shell, the one end of first measurement core is fixed the one end of first crossbeam, the other end of first measurement core is portable to be inserted and to be located in the first shaft-like shell, first measurement core with first displacement sensor cooperation is used the measurement the axial displacement of the core that awaits measuring.
3. The gripper according to claim 2, wherein the second displacement measuring section includes: a second rod-shaped housing, a second measuring core and a second displacement sensor;
the second rod-shaped shell is fixed at the other end of the second cross beam, the second rod-shaped shell is perpendicular to the second cross beam, the second displacement sensor is installed on the inner wall of the second rod-shaped shell, one end of the second measuring core is fixed at the other end of the first cross beam, the other end of the second measuring core is movably inserted into the second rod-shaped shell, and the second measuring core and the second displacement sensor are matched to measure axial displacement of the to-be-measured rock core.
4. The clamp according to claim 3, wherein both ends of the first beam are provided with a first fixing hole and a second fixing hole, and both ends of the second beam are provided with a third fixing hole and a fourth fixing hole;
one end of the first measuring core is fixed on the first cross beam through the first fixing hole, and one end of the second measuring core is fixed on the first cross beam through the second fixing hole; one end of the first rod-shaped shell is fixed on the second cross beam through a third fixing hole, and one end of the second rod-shaped shell is fixed on the second cross beam through a fourth fixing hole.
5. A holder according to any one of claims 1 to 4 further comprising: a rubber sleeve;
the rubber sleeve is sleeved on the outer wall of the core to be tested.
6. The holder of claim 5, wherein the core under test is 1 inch, 2 inches, or 9 inches in length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374652.XA CN110398449B (en) | 2018-04-24 | 2018-04-24 | Rock core holder and rock physical parameter testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374652.XA CN110398449B (en) | 2018-04-24 | 2018-04-24 | Rock core holder and rock physical parameter testing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110398449A CN110398449A (en) | 2019-11-01 |
| CN110398449B true CN110398449B (en) | 2022-08-05 |
Family
ID=68321960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810374652.XA Active CN110398449B (en) | 2018-04-24 | 2018-04-24 | Rock core holder and rock physical parameter testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110398449B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111965086A (en) * | 2020-06-30 | 2020-11-20 | 南通市中京机械有限公司 | Core centre gripping ring is pressed and is detected integral type equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4385520A (en) * | 1981-05-01 | 1983-05-31 | Mobil Oil Corporation | Strain and phase detection for rock materials under oscillatory loading |
| CN104596854B (en) * | 2014-12-31 | 2017-03-08 | 西南石油大学 | The devices and methods therefor of rock triaxial strength under the conditions of a kind of measure supercritical carbon dioxide |
| CN105352797B (en) * | 2015-10-27 | 2017-11-24 | 河海大学 | Magnetic-type fixed rock axle draws the device and method of test specimen extensometer accessory part |
| CN105547809B (en) * | 2016-01-05 | 2018-05-29 | 山东大学 | ECC axial tension tests DEFORMATION MONITORING SYSTEM and method |
| CN106370731A (en) * | 2016-09-09 | 2017-02-01 | 中国石油大学(华东) | Ultrasonic longitudinal and shear wave-resistivity integrated type probe for rock physical experiment |
| CN206510580U (en) * | 2017-01-17 | 2017-09-22 | 常山深联彩印包装有限公司 | A kind of code-spraying printer stable holding mechanism |
-
2018
- 2018-04-24 CN CN201810374652.XA patent/CN110398449B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110398449A (en) | 2019-11-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202170792U (en) | Measuring device of radial deformation of well hole | |
| CN201043915Y (en) | Three-component optical fiber optical grating vibration transducer | |
| KR101201936B1 (en) | Measuring rod and penetrometer using the same | |
| US7784338B2 (en) | Low mass sensor for free point tool | |
| CN109142536B (en) | High-precision real-time positioning detection device for internal damage of rock | |
| CN111413198B (en) | Acoustic emission-resistivity-stress synchronous testing device and method for rock | |
| CN110398449B (en) | Rock core holder and rock physical parameter testing device | |
| Obert et al. | Borehole deformation gage for determining the stress in mine rock | |
| CN210375984U (en) | Split type three-dimensional pressure device | |
| CN105091662A (en) | Testing device and testing method for gun barrel of perforating gun | |
| CN104500053B (en) | Compound probe for rock sample testing | |
| CN108756795B (en) | Experimental method for researching reverse fault ground stress of coal mine tunnel | |
| CN107542077B (en) | A kind of static sounding probe of non-hollow structure | |
| US4288901A (en) | Method of manufacturing and calibrating a displacement measuring sensor | |
| CN104236446A (en) | Drilling multi-component strain measurement head | |
| RU2364848C2 (en) | Device for measurement of pressure and profile of shock waves | |
| CN107727733A (en) | A kind of conductivity meter based on impulse eddy current | |
| CN108252289B (en) | Device for independently calibrating side friction resistance of static sounding instrument | |
| US4170897A (en) | Displacement measuring sensor | |
| CN114062137A (en) | Electromagnetic ultrasonic stress detection device and method for oil and gas pipeline | |
| CN111323487A (en) | Device, system and method for measuring anisotropic sound velocity of rock | |
| CN113405648B (en) | Variable stress type vibration sensor | |
| US5767413A (en) | Peripheral gauge | |
| CN218757385U (en) | From spiral plate load test probe of taking pore pressure monitoring | |
| CN211855659U (en) | Battery explosive force measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |