CN202710408U - Rock volume deformation measuring sensor - Google Patents
Rock volume deformation measuring sensor Download PDFInfo
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- CN202710408U CN202710408U CN 201220410403 CN201220410403U CN202710408U CN 202710408 U CN202710408 U CN 202710408U CN 201220410403 CN201220410403 CN 201220410403 CN 201220410403 U CN201220410403 U CN 201220410403U CN 202710408 U CN202710408 U CN 202710408U
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Abstract
A rock volume deformation measurement sensor comprises a measuring oil cylinder, a piston, piston rods and a displacement sensor, wherein the piston is located inside the measuring oil cylinder, the measuring oil cylinder is divided into a first chamber and a second chamber, the first chamber is provided with a first oil-conveying branch pipe connected with an oil-conveying main pipeline, the second chamber is provided with a second oil-conveying branch pipe connected with the oil-conveying main pipeline, and the oil-conveying main pipeline is provided with a stop valve between a connector of the first oil-conveying branch pipe and a connector of the second oil-conveying branch pipe. The number of the piston rods is two, one ends of the two piston rods are respectively and fixedly connected with central positions of two end faces of the piston, the central lines of the two piston rods coincide with the central line of the piston, the other ends of the two piston rods respectively extend out of end caps at two ends of the measuring oil cylinder, the displacement sensor is installed on the outer lateral wall of the measuring oil cylinder, and a free end of a displacement measuring rod of the displacement sensor is connected with the piston rod at the outlet end of the oil-conveying main pipeline through a connecting piece.
Description
Technical field
The utility model belongs to the performances of rock field tests, particularly a kind of utensil that the rock sample cubic deformation is carried out quantitative test.
Background technology
The cubic deformation of existing rock sample is to utilize the vertical and horizontal extensometer that is installed on the rock sample, or is attached to the vertical and horizontal foil gauge on rock sample surface, measure respectively the strain of two direction after, calculate again the cubic deformation of rock according to formula.Yet, above-mentioned measuring appliance and method are only applicable to the hard rock of small deformation, then can't measure for the soft rock that large deformation can occur, and above-mentioned measuring appliance and method recording only is distortion corresponding to cross section in the rock, is not the real cubic deformation of rock.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of rock volume deformation measurement sensor is provided, in order to can obtain the overall process data of rock sample cubic deformation in process of the test, accurately measures the real cubic deformation of rock.
Rock volume deformation measurement sensor described in the utility model comprises and measures oil cylinder, piston, piston rod, displacement transducer and oil transportation main line; Piston is positioned at measures oil cylinder, oil cylinder be will measure and the first chamber and the second chamber will be divided into, the first chamber is provided with the first oil transportation arm that is connected with the oil transportation main line, the second chamber is provided with the second oil transportation arm that is connected with the oil transportation main line, is provided with stop valve between the joint of oil transportation main line and the first oil transportation arm and the joint of the second oil transportation arm; Piston rod is two, and an end of two-piston bar is connected with the centre of side face of piston ring respectively, and the central lines of their center line and piston, and the other end of two-piston bar stretches out from the end cap of measuring the oil cylinder two ends respectively; Displacement transducer is installed on the lateral wall of measuring oil cylinder, and the free end of its displacement measurement bar is connected with the piston rod that is positioned at oil transportation main line endpiece by web member.
Rock volume deformation measurement sensor described in the utility model, the length of its piston rod should be greater than the length of measuring oil cylinder, to satisfy the needs of measuring.
Rock volume deformation measurement sensor described in the utility model, the preferred two ends of its web member are provided with rod member or the stripe board of connecting hole.
The using method of rock volume deformation measurement sensor described in the utility model:
1. rock sample is installed on the indoor sample bench of the triaxial pressure of triaxial compression test machine, the oil transportation main line endpiece of described rock volume deformation measurement sensor is connected with the petroleum pipeline of described triaxial cell, the oil transportation main line entrance point of described rock volume deformation measurement sensor is connected with supply reservoir, the signal output interface of the displacement transducer of described rock volume deformation measurement sensor is connected with the control system of triaxial compression test machine;
2. open the stop valve that arranges on the described oil transportation main line, make the triaxial cell of the first chamber, the second chamber and the triaxial compression test machine of measuring oil cylinder be full of fluid;
3. according to the contingent maximum volume dilatational strain of the rock sample of preresearch estimates, the piston rod that operation is not connected with the displacement measurement bar, piston transferred to measure the corresponding position of the contingent maximum volume dilatational strain of rock sample, then close the stop valve that arranges on the oil transportation main line;
When 4. measuring the compression volume distortion of rock sample, the triaxial pressure that the measurement oil cylinder is inputted the triaxial compression test machine continuously near the fluid in the chamber of oil transportation main line endpiece is indoor, cause piston to the endpiece motion of oil transportation main line, the piston rod that is connected with piston drives the displacement measurement bar of displacement transducer to the direction motion of piston movement, in the motion of displacement measurement bar, displacement transducer is carried the electric signal of displacement measurement bar exercise data to the control system of triaxial compression test machine, the control system of triaxial compression test machine is processed the electric signal that receives, and record also shows that the compression volume of rock is out of shape;
When 5. measuring the expanding volume distortion of rock sample, the indoor continuous input measurement oil cylinder of fluid of the triaxial pressure of triaxial compression test machine is near in the chamber of oil transportation main line endpiece, cause piston to the entrance point motion of oil transportation main line, the piston rod that is connected with piston drives the displacement measurement bar of displacement transducer to the direction motion of piston movement, in the motion of displacement measurement bar, displacement transducer is carried the electric signal of displacement measurement bar exercise data to the control system of triaxial compression test machine, the control system of triaxial compression test machine is processed the electric signal that receives, the expanding volume distortion of record and demonstration rock.
Can find out from said method, when rock sample generation compression volume is out of shape, to cause measuring oil cylinder reduces near the fluid in the chamber of oil transportation main line endpiece, thereby the chamber volume near oil transportation main line endpiece is reduced, when rock sample expands cubic deformation, to cause measuring oil cylinder increases near the fluid in the chamber of oil transportation main line endpiece, thereby the chamber volume near oil transportation main line endpiece is increased, measure oil cylinder and reduce to be worth near oil transportation main line endpiece chamber volume and deduct the triaxial compression test machine and load column and be pressed into the indoor volume change value of triaxial pressure and then be the cubic deformation value of rock sample generation compression volume distortion, measure oil cylinder and deduct the triaxial compression test machine near oil transportation main line endpiece chamber volume added value and load column and be pressed into the indoor volume change value of triaxial pressure then expands cubic deformation for rock sample cubic deformation value.Carry out Software for Design and in the control system of triaxial compression test machine described software is installed according to above-mentioned mechanism, the control system of triaxial compression test machine can be out of shape according to the electric signal record of displacement measurement bar exercise data and compression volume distortion and the expanding volume of demonstration rock.
The utlity model has following beneficial effect:
1, the utility model provides a kind of unlike the prior art new surveying instrument of design for the measurement of rock sample cubic deformation, this kind sensor and triaxial compression test machine are used, and can obtain the overall process data of rock sample cubic deformation in being pressed process and the true volume distortion of rock sample.
2, use rock volume deformation measurement sensor described in the utility model, problem is measured in the cubic deformation that efficiently solves the soft rock with large deformation feature, and the utilization that can be soft rock provides reliable Data support.
3, rock volume deformation measurement sensor described in the utility model is not only simple in structure, and supports the use easy and simple to handlely with the triaxial compression test machine, thereby is easy to promote.
Description of drawings
Fig. 1 is the structural representation of rock volume deformation measurement sensor described in the utility model;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the A-A cut-open view of Fig. 1;
Fig. 4 is the structural representation of the triaxial cell of triaxial compression test machine.
Among the figure, the 1-piston rod, 2-measures oil cylinder (2-1: the first chamber, 2-2: the second chamber); the 3-piston, 4-displacement transducer shell, 5-displacement measurement bar; the 6-web member, 7-stop valve, 8-oil transportation main line; 9-the first oil transportation arm, 10-the second oil transportation arm, 11-rock sample top-loaded column; the 12-triaxial cell, 13-diaphragm, 14-rock sample; 15-rock sample bottom-loaded column, 16-triaxial cell petroleum pipeline, 17-triaxial cell base.
Embodiment
Below in conjunction with accompanying drawing rock volume deformation measurement sensor described in the utility model and using method are described further.
In the present embodiment, the structure of rock volume deformation measurement sensor such as Fig. 1, Fig. 2, shown in Figure 3 consist of by measuring oil cylinder 2, piston 3, piston rod 1, displacement transducer, web member 6, oil transportation main line 8, the first oil transportation arm 9, the second oil transportation arm 10 and stop valve 7.
The length of measuring oil cylinder 2 is 400mm, and internal diameter is 80mm, and the external diameter of piston 3 is identical with the internal diameter nominal size of measuring oil cylinder 2, and for movingly, described piston 3 is positioned at measures oil cylinder 2, will measure oil cylinder and be divided into the first chamber 2-1 and the second chamber 2-2; One end of the first oil transportation arm 9 is connected with the first chamber 2-1, its other end is connected with oil transportation main line 8, one end of the second oil transportation arm 10 is connected with the second chamber 2-2, its other end is connected with oil transportation main line 8, stop valve 7 is high-pressure ball valve (model: MKHP-800, China sky, Yuci emerging hydraulic machine company limited produces), be arranged between the joint of the joint of oil transportation main line and the first oil transportation arm and the second oil transportation arm; Piston rod 1 is two, the length of two-piston bar is all than the long 40mm of length that measures oil cylinder 2, one end of two-piston bar is connected with the centre of piston 3 both ends of the surface respectively, and the central lines of their center line and piston 3, the other end of two-piston bar are stretched out from the end cap of measuring the oil cylinder two ends respectively; Displacement transducer is commercial goods (model: WYDC-500L, manufacturing enterprise: the former observation and control technology of Chinese Xiamen Ke company limited), its range is greater than the length of measuring oil cylinder 2, described displacement transducer is installed on the lateral wall of measuring oil cylinder, the free end of its displacement measurement bar 5 is connected with the piston rod that is positioned at oil transportation main line 8 endpiece by web member 6, and described web member 6 is provided with the stripe board of connecting hole for two ends.
Present embodiment to the soft rock test specimen cubic deformation in triaxial compression test measure, the triaxial compression test machine model of use is: MTS815(American MTS company produces); Use embodiment 1 described rock volume deformation measurement sensor, operate as follows:
1. rock sample 14 is installed on the indoor sample bench of the triaxial pressure of triaxial compression test machine (as shown in Figure 4), oil transportation main line 8 endpiece of described rock volume deformation measurement sensor are connected with the petroleum pipeline 16 of described triaxial cell, oil transportation main line 8 entrance points of described rock volume deformation measurement sensor are connected with supply reservoir, the signal output interface of the displacement transducer of described rock volume deformation measurement sensor is connected with the control system of triaxial compression test machine;
2. open the stop valve 7 that arranges on the described oil transportation main line 8, make the first chamber 2-1, the second chamber 2-2 of measurement oil cylinder and the triaxial cell 12 of triaxial compression test machine be full of fluid;
3. according to the contingent maximum volume dilatational strain of the rock sample of preresearch estimates, the piston rod that operation is not connected with displacement measurement bar 5, piston 3 is transferred to the position corresponding with the contingent maximum volume dilatational strain of rock sample, then close the stop valve 7 that arranges on the oil transportation main line 8;
4. operate the triaxial compression test machine, rock sample 14 is applied confined pressure pressure, under the effect of confined pressure pressure, the compression volume distortion occurs in rock sample 14 gradually, in this process, measuring fluid among the second chamber 2-2 of oil cylinder 2, to input continuously the triaxial pressure of triaxial compression test machine indoor, cause piston 3 to the endpiece motion of oil transportation main line 8, the piston rod that is connected with piston drives the displacement measurement bar 5 of displacement transducer to the direction motion of piston movement, in 5 motions of displacement measurement bar, displacement transducer is carried the electric signal of displacement measurement bar exercise data to the control system of triaxial compression test machine, the control system of triaxial compression test machine is processed the electric signal that receives, and record also shows that the compression volume of rock is out of shape;
5. after confined pressure pressure adds to desired value, operation triaxial compression test machine applies xial feed to rock sample 14, until rock failure, under the effect of xial feed, the compression volume distortion at first occurs in rock sample 14, then expand cubic deformation, occur in the compression volume deformation process at rock sample 14, measuring fluid among the second chamber 2-2 of oil cylinder 2, to input continuously the triaxial pressure of triaxial compression test machine indoor, cause piston 3 to the endpiece motion of oil transportation main line 8, the piston rod that is connected with piston drives the displacement measurement bar 5 of displacement transducer to the direction motion of piston movement, in 5 motions of displacement measurement bar, displacement transducer is carried the electric signal of displacement measurement bar exercise data to the control system of triaxial compression test machine, the control system of triaxial compression test machine is processed the electric signal that receives, and record also shows that the compression volume of rock is out of shape; Expand in the cubic deformation process at rock sample 14, among the second chamber 2-2 of the continuous input measurement oil cylinder 2 of fluid that the triaxial pressure of triaxial compression test machine is indoor, cause piston 3 to the entrance point motion of oil transportation main line 8, the piston rod that is connected with piston drives the displacement measurement bar 5 of displacement transducer to the direction motion of piston movement, in 5 motions of displacement measurement bar, displacement transducer is carried the electric signal of displacement measurement bar exercise data to the control system of triaxial compression test machine, the control system of triaxial compression test machine is processed the electric signal that receives, the expanding volume distortion of record and demonstration rock.
Claims (3)
1. a rock volume deformation measurement sensor is characterized in that comprising measurement oil cylinder (2), piston (3), piston rod (1), displacement transducer and oil transportation main line (8);
Piston (3) is positioned at measures oil cylinder (2), oil cylinder be will measure and the first chamber (2-1) and the second chamber (2-2) will be divided into, the first chamber is provided with the first oil transportation arm (9) that is connected with oil transportation main line (8), the second chamber is provided with the second oil transportation arm (10) that is connected with oil transportation main line (8), is provided with stop valve (7) between the joint of oil transportation main line and the first oil transportation arm and the joint of the second oil transportation arm;
Piston rod (1) is two, and an end of two-piston bar is connected with the centre of side face of piston ring respectively, and the central lines of their center line and piston, and the other end of two-piston bar stretches out from the end cap of measuring the oil cylinder two ends respectively;
Displacement transducer is installed on the lateral wall of measuring oil cylinder, and the free end of its displacement measurement bar (5) is connected with the piston rod that is positioned at oil transportation main line (8) endpiece by web member (6).
2. rock volume deformation measurement sensor according to claim 1 is characterized in that the length of described piston rod (1) is greater than the length of measuring oil cylinder (2).
3. rock volume deformation measurement sensor according to claim 1 and 2 is characterized in that described web member (6) is provided with rod member or the stripe board of connecting hole for two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410403 CN202710408U (en) | 2012-08-17 | 2012-08-17 | Rock volume deformation measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220410403 CN202710408U (en) | 2012-08-17 | 2012-08-17 | Rock volume deformation measuring sensor |
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| Publication Number | Publication Date |
|---|---|
| CN202710408U true CN202710408U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220410403 Withdrawn - After Issue CN202710408U (en) | 2012-08-17 | 2012-08-17 | Rock volume deformation measuring sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798371A (en) * | 2012-08-17 | 2012-11-28 | 四川大学 | Rock volume deformation measuring sensor and rock test-piece volume deformation measuring method |
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2012
- 2012-08-17 CN CN 201220410403 patent/CN202710408U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798371A (en) * | 2012-08-17 | 2012-11-28 | 四川大学 | Rock volume deformation measuring sensor and rock test-piece volume deformation measuring method |
| CN102798371B (en) * | 2012-08-17 | 2014-12-10 | 四川大学 | Rock volume deformation measuring sensor and rock test-piece volume deformation measuring method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |