CN105203400A - Triaxial creep testing device - Google Patents
Triaxial creep testing device Download PDFInfo
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- CN105203400A CN105203400A CN201510673151.8A CN201510673151A CN105203400A CN 105203400 A CN105203400 A CN 105203400A CN 201510673151 A CN201510673151 A CN 201510673151A CN 105203400 A CN105203400 A CN 105203400A
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Abstract
The invention relates to a triaxial creep testing device which comprises a hydrostatic compression system, a first pressure pump and a data acquisition system, wherein the hydrostatic compression system comprises a pressure tank, a second pressure pump and more than two piston systems; the pressure tank comprises a tank body, a lower cover body and an upper cover body; the top of the tank body is fixedly connected with the upper cover body through a flange; the bottom of the tank body is fixedly connected with the lower cover body; the second pressure pump penetrates through the lower cover plate through a hydrostatic compression pipe and is communicated with the pressure tank; the more than two piston systems are fixedly arranged at the bottom of the pressure tank; a test piece is placed at the top of each piston system; the bottom of each piston system penetrates through the lower cover plate through a piston hydraulic pipe and is connected with the pressure pump; the data acquisition system comprises a controller and a plurality of foil gauges which are circumferentially clung to each test piece; each foil gauge is connected with a data line; each data line is connected with the controller through a wiring tube which is arranged on the lower cover plate. The triaxial creep testing device can effectively improve the testing efficiency and the accuracy of the testing results.
Description
Technical field
The present invention relates to a kind of creep test device, particularly about a kind of three axis creep test device.
Background technology
Creep of rock refers generally to rock under constant stress condition, is out of shape the Mechanics Phenomenon increased gradually in time.Along with the increase of the pit mining degree of depth, deep rock mass is in the environment such as the time effect that stress is high, temperature is high and stronger, and deep wall rock shows the feature of engineering soft rock.The creep of research deep wall rock, discloses its creep process and rule, has very real and important meaning for solution deep underground engineering design and maintenance issues.
In cbm development process, the mining of coal bed gas well is a long-term process, and the creep properties of reservoir coal petrography can impact the physical property of the stability of coal bed gas well and reservoir, and then affects the mining of coal-seam gas.For the creep properties of coal petrography, Chinese scholars has carried out many experimental studies, wherein, modal creep test method has three kinds, is uniaxial static creep test, shear creep test and three axis creep test respectively, but these test great majority are single sample bearing test, therefore once can only study a sample, make test efficiency low, and be difficult to the dead load state in warranty test process, affect the accuracy of test findings.
Summary of the invention
For the problems referred to above, the object of this invention is to provide a kind of three axis creep test device that effectively can improve test efficiency.
For realizing above-mentioned technical purpose, the present invention takes following technical scheme: a kind of three axis creep test device, and it comprises a confined pressure system, one first forcing pump and a data acquisition system (DAS); Described confined pressure system comprises a head tank, one second forcing pump and plural piston system; Described head tank comprises a body, a lower cover and a upper cover body, the top of described body is fixedly connected with described upper cover body by flange, the bottom of described body is fixedly connected with described lower cover, described second forcing pump is communicated with described head tank through described lower cover by a confined pressure pipe, plural described piston system is fixedly installed on bottom described head tank, described in each, a sample is placed at the top of piston system, and the bottom of piston system described in each connects described first forcing pump by a piston hydraulic pressure pipe through described lower cover; Described data acquisition system (DAS) comprises the foil gauge that a controller and some circumferences are attached at sample described in each, and foil gauge described in each all connects a data line, and data line described in each all connects described controller by the fairlead be arranged on described lower cover.
Described axle creep test device also comprises a dead load and ensures device, described dead load ensures that device adopts a sealed shell of tank, arrange an import and an outlet bottom described sealed shell of tank, described import connects described first forcing pump by pipeline and connects, and described outlet is connected in parallel each piston hydraulic pressure pipe by pipeline.
Described three axis creep test device also comprises some cushion blocks, and described cushion block to be folded in described in each between sample top and upper cover body inwall.
The number of described piston system is two.
The present invention is owing to taking above technical scheme, and it has the following advantages: 1, the present invention owing to arranging plural piston system in same confined pressure system, makes it possible to study plural sample simultaneously, and then effectively improves test efficiency.2, the present invention is owing to being set to hermetically-sealed construction by head tank, after making silicone oil pump-in pressure tank inside, plenum chamber effect can be formed at head tank top, therefore, it is possible to avoid because in process of the test, sample compression or silicone oil reveal the compression shock effect and fluctuating range that cause the second forcing pump repeatedly to restart to cause, and then ensure that sample can be in dead load state all the time.3, the present invention is owing to arranging the dead load guarantee device of sealing, after making silicone oil pump into dead load guarantee device inside, dead load ensures that plenum chamber effect can be formed at device top, therefore, it is possible to avoid because in process of the test, sample compression or silicone oil reveal the compression shock effect and fluctuating range that cause the second forcing pump repeatedly to restart to cause, and then ensure that sample can be in dead load state all the time.4, the present invention is due to sandwiched cushion block between each sample top and upper cover body inwall, effectively have adjusted the length difference of test itself, makes test findings more accurate.Structure of the present invention is simple, easy to operate can be widely used in creep test.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.In describing the invention, it is to be appreciated that term " first ", " second " etc. are only used for the object described, and instruction or hint relative importance can not be interpreted as.
As shown in Figure 1, three axis creep test device of the present invention comprises confined pressure system 1,1 first forcing pump 2 and a data acquisition system (DAS) 3;
Confined pressure system 1 comprises head tank 11,1 second forcing pump 12 and a plural piston system 13; Head tank 11 comprises body 111, lower cover 112 and a upper cover body 113, upper cover body 113 is fixed on body 111 top by the sealing of flange (not shown), make to ensure head tank 11 inner sealing, upper cover body 113 can be opened at any time as required again; Lower cover 112 sealing is fixed on bottom body 111, on lower cover 112 inwall, sealing wears fairlead 114 and a confined pressure pipe 115, confined pressure pipe 115 connects the second forcing pump 12 by line seal, lower cover 112 inwall is fixedly installed plural piston system 13, the top of each piston system 13 is for placing a sample 4, the bottom of each piston system 13 all connects a sealing and is located in piston hydraulic pressure pipe 116 on lower cover 112 inwall, and each piston hydraulic pressure pipe 116 is all connected to the first forcing pump 2 by pipeline;
Data acquisition system (DAS) 3 comprises the foil gauge 32 that a controller 31 and some circumferences are attached at each sample 4, and the number of foil gauge 32, at this not circumscribed, is determined as the case may be; Each foil gauge 32 all connects a data line, and each data line is all through fairlead 114 connection control device 31.
In a preferred embodiment, three axis creep test device also comprises a dead load and ensures device 5, dead load ensures that device 5 adopts a sealed shell of tank 51, one import 52 and an outlet 53 is set bottom tank body 51, import 52 connects the first forcing pump 2 by pipeline, and outlet 53 is connected in parallel each piston hydraulic pressure pipe 116 by pipeline.
In a preferred embodiment, three axis creep test device also comprises some cushion blocks 6, and the number of cushion block 6 is identical with the number of sample 4; Cushion block 6 is folded between each sample 4 top and upper cover body 113 inwall.
In a preferred embodiment, the number of piston system 13 can be two.
Describe the use procedure of three axis creep test device of the present invention in detail below by specific embodiment, detailed process is:
1) upper cover body 113 opening head tank 11, by being placed on the top of two-piston system 13 after two samples 4 respectively circumferential some foil gauges 32 that is sticked respectively, all places cushion block 6 at each sample 4 top, sealing fixed cover body 113; First forcing pump 2 is connected a fuel tank respectively with the second forcing pump 12, and pours silicone oil in fuel tank;
2) by the second forcing pump 12, silicone oil is pumped in head tank 11, when the pressure in head tank 11 reaches preset value, stops pumping into silicone oil; Because there is air head tank 11 inside, and head tank 11 inside seals completely, and after silicone oil pump-in pressure tank 11 inside, plenum chamber effect can be formed at head tank 11 top;
Simultaneously, by the first forcing pump 2, silicone oil being pumped into dead load ensures in device 5, because dead load ensures that device 5 is communicated with each piston system 13, so silicone oil also can enter in each piston system 13 simultaneously, when the pressure in piston system 13 reaches preset value, stop pumping into silicone oil; Because dead load ensures that there is air device 5 inside, and dead load ensures to seal completely in device 5, and after silicone oil pumps into dead load guarantee device 5 inside, dead load ensures that plenum chamber effect can be formed at device 5 top;
3) respectively by the second forcing pump 12 and the first forcing pump 2, constant confined pressure and axial compression are applied respectively to each sample 4, after each sample 4 bears constant confined pressure and axial compression, certain distortion can be produced, be sent to controller 31 by the foil gauge on sample 4 process straining data over time.
Above-described embodiment is only for illustration of the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (5)
1. a three axis creep test device, is characterized in that: it comprises a confined pressure system, one first forcing pump and a data acquisition system (DAS); Described confined pressure system comprises a head tank, one second forcing pump and plural piston system; Described head tank comprises a body, a lower cover and a upper cover body, the top of described body is fixedly connected with described upper cover body by flange, the bottom of described body is fixedly connected with described lower cover, described second forcing pump is communicated with described head tank through described lower cover by a confined pressure pipe, plural described piston system is fixedly installed on bottom described head tank, described in each, a sample is placed at the top of piston system, and the bottom of piston system described in each connects described first forcing pump by a piston hydraulic pressure pipe through described lower cover; Described data acquisition system (DAS) comprises the foil gauge that a controller and some circumferences are attached at sample described in each, and foil gauge described in each all connects a data line, and data line described in each all connects described controller by the fairlead be arranged on described lower cover.
2. a kind of three axis creep test device as claimed in claim 1, it is characterized in that: described axle creep test device also comprises a dead load and ensures device, described dead load ensures that device adopts a sealed shell of tank, one import and an outlet are set bottom described sealed shell of tank, described import connects described first forcing pump by pipeline and connects, and described outlet is connected in parallel each piston hydraulic pressure pipe by pipeline.
3. a kind of three axis creep test device as claimed in claim 1, is characterized in that: described three axis creep test device also comprises some cushion blocks, and described cushion block to be folded in described in each between sample top and upper cover body inwall.
4. a kind of three axis creep test device as claimed in claim 2, is characterized in that: described three axis creep test device also comprises some cushion blocks, and described cushion block to be folded in described in each between sample top and upper cover body inwall.
5. a kind of three axis creep test device as claimed in claim 1 or 2 or 3 or 4, is characterized in that: the number of described piston system is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510673151.8A CN105203400A (en) | 2015-10-16 | 2015-10-16 | Triaxial creep testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510673151.8A CN105203400A (en) | 2015-10-16 | 2015-10-16 | Triaxial creep testing device |
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| CN105203400A true CN105203400A (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510673151.8A Pending CN105203400A (en) | 2015-10-16 | 2015-10-16 | Triaxial creep testing device |
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| CN (1) | CN105203400A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153463A (en) * | 2016-09-19 | 2016-11-23 | 安徽理工大学 | A kind of monitoring method of standard rock sample internal strain |
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2015
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| CN106153463A (en) * | 2016-09-19 | 2016-11-23 | 安徽理工大学 | A kind of monitoring method of standard rock sample internal strain |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: CNOOC research institute limited liability company Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Applicant before: China National Offshore Oil Corporation Applicant before: CNOOC Research Institute |
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151230 |