CN102519804A - Ultra-low temperature testing device - Google Patents
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- CN102519804A CN102519804A CN2011104598947A CN201110459894A CN102519804A CN 102519804 A CN102519804 A CN 102519804A CN 2011104598947 A CN2011104598947 A CN 2011104598947A CN 201110459894 A CN201110459894 A CN 201110459894A CN 102519804 A CN102519804 A CN 102519804A
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Abstract
The invention relates to a testing device used for a concrete ultra-low temperature bearing capacity test. The testing device includes a loading testing machine and an ultra-low temperature testing furnace, wherein an upper bearing platform and a lower bearing platform are arranged on the loading testing machine; a slide rail is arranged at the lower bearing platform of the loading testing machine; a sliding trolley is arranged on the slide rail; and the ultra-low temperature testing furnace is fixed on the sliding trolley; an upper pressure head and a lower pressure head are arranged at the top end and the bottom end of the ultra-low temperature testing furnace respectively and adopt convex structures; one part of the upper pressure head and one part of the lower pressure head are placed in the ultra-low temperature testing furnace; one part of the upper pressure head and one part of the lower pressure head are placed outside the ultra-low temperature testing furnace; the pressure heads placed in the ultra-low temperature testing furnace are made of mixed material of stainless steel and plexiglass steel; and the pressure heads placed outside the ultra-low temperature testing furnace are made of plexiglass steel. The ultra-low temperature testing device provided by the invention can be used for moving the ultra-low temperature testing furnace in or out of the loading testing machine conveniently, and can be used for measuring the bearing capacity of concrete under the ultra-low temperature accurately and repeatedly.
Description
Technical field
The present invention relates to a kind of cryogenic testing device, particularly relate to a kind of test unit that is used for the test of concrete ultralow temperature stress performance.
Background technology
The large-scale storage tank of liquefied natural gas (LNG) (LNG) receiving station adopts prestressed reinforced concrete construction; And the condensing temperature of rock gas is approximately-165 ℃; Under such cold service, concrete stress performance obviously is different from normal temperature, particularly its deformation performance; Continuous reduction with temperature also will produce different regularity of change.Obviously, the stress performance of LNG storage tank will be limited by the variation of concrete ultralow temperature stress performance.
Concrete low temperature stress performance receives the attention of researcher height always, and relevant research is also more, but mostly based on suffering physical environment low temperature, and also promptly the temperature of effect is not less than-50 ℃ situation and inquires into.As far back as the fifties in last century, existing abroad scholar pays close attention to the stress performance of concrete ultralow temperature, and has carried out some researchs of this respect.In recent years, along with the construction of Large LNG receiving station, relevant researchist begins to pay close attention to concrete stress performance under the ultralow temperature effect again.
Domestic relevant concrete low temperature Study on behavior mainly concentrates on physical environment low temperature, and its temperature value is not less than-30 ℃ more.Existing research shows, reach-30 ℃ in temperature after, continue to reduce with temperature, its stress performance also will have the Changing Pattern that obviously is different from before this.Obviously, these achievements in research of domestic existing can only be as a reference, can not be applied directly in the design of this type tank structure to go, and need be given in concrete stress performance parameter under the ultralow temperature effect specially.Even supposing the achievement in research of external this respect can meet the demands; Because the component materials of concrete Performance Characteristics has tangible region; The concrete that the different regions material is built; Its stress performance particularly characteristic of its quantitative aspect is incited somebody to action difference to some extent, and its result of study also depends on other many factors.Therefore, reference when only foreign study achievements also can only or design as correlative study can not directly be applied mechanically simply.Moreover China does not have related specifications or the standard that relates to concrete aspect under the ultralow temperature effect at present as yet, need combine China's national situation and corresponding demand to provide its achievement in research and data yet.
Cryogenic testing is different from conventional test, needs to consider the corresponding test unit of the special making of its test features.More existing cryogenic testing devices also spininess are difficult to contain the test of ultralow temperature concrete stress performance to specific or single content of the test, and not do not consider or reflect well and utilize concrete mechanical characteristic under the ultralow temperature.
More existing cryogenic testing devices probably can divide two types at present.One type only can the refrigeration test test specimen; The another kind of various operating condition of test that then can lower the temperature and load combination.Low-temperature test device (Takashi Miur, The properties of concrete at very low temperatures, Materials and Structures/Materiaux et Constructions like Takashi; 1989; 22,243-254), the sealing box space that it is processed by thermal insulation material etc.; The test test specimen is put into wherein, lowers the temperature through the input liquid nitrogen.This test unit can only carry out the ultralow temperature effect to the test test specimen to be handled, and can not satisfy the various testing requirementss of material stress performance such as ultralow temperature concrete.Also just like low-temperature test device (T.R.Naik, Temperature Effects on Concrete, the A symposium sponsored by ASTM Committee C-9 on Concrete and Concrete Aggregates of Naik; Kansas City; MO, 21 June 1983), this test unit adopts liquid nitrogen as cooling medium; Process low-temperature (low temperature) vessel by hollow steel cylinder and liner thermal insulation material, by the thermopair control temperature that is embedded in the cooling chamber.Cooling device directly is installed near the low-temperature (low temperature) vessel inwall, and the loading position of test specimen is in the top and the bottom of cooling chamber.The liquid nitrogen of cooling medium is ejected in the furnace chamber through a plurality of copper pipes in cooling device place.Though this test unit can satisfy the test test specimen is lowered the temperature and the value-added tax function requirement; But in implementing relevant operating condition of test, there are many critical defects; Mainly contain: (1) cooling medium is not in a confined space; Adopt many liquid spouting nozzles nitrogen to attempt to make furnace chamber temperature even, shower nozzle is prone to blocked by the broken thin slag that forms in the concrete sample destructive process, and the violent explosion formula destruction of test specimen also makes shower nozzle be prone to ruin.It is thus clear that; This low temperature mode that applies is difficult to make furnace chamber temperature evenly (furnace chamber temperature evenly is to test the most basic requirement); And this trial furnace is difficult to reappear and keeps repeated tests (test of material at low temperature such as concrete need be carried out a large amount of and repeated test; The repeatability of test condition with can stand cryogenic testing repeatedly percussive action be the essential condition of its test unit), can not satisfy the testing requirements of ultralow temperature concrete stress performance well.(2) the ultralow temperature concrete strength is higher, rigidity is big; Though and thermal insulation material can be sought out and has the higher-strength performance; But its rigidity and hardness are all relatively poor; In process of the test, can not to test specimen stress comparatively uniformly be provided all the time, more obvious when particularly concrete sample is about to destroy by its influence.Pressure head adopts steel, and it conducts heat fast, not only consumes low-temperature energy sources, also makes test test piece end temperature be starkly lower than other place, at cryogenic testing fire door place frosting frozen slightly for a long time, also corrosion phenomena will occur simultaneously.These all will seriously influence test test specimen ultralow temperature stress performance test findings, even some cryogenic testing operating mode can't be implemented.(3) owing to will place heat-insulating block, seaming chuck and test specimen and the heat-insulating block between seaming chuck between push-down head, test specimen and push-down head in the furnace chamber of cryogenic testing stove; Its test test specimen location certainly exists problem and is difficult to the location, and has test test specimen eccentricity issues inevitably.The stress condition that this will change the test test specimen has a strong impact on its test findings, even changes the destruction form of test test specimen, and obvious this disposal route is improper.(4) the test test specimen axial deformation of this test unit obtains through measuring the distortion of going up between push-down head, and this is obviously inadvisable.Its measurement also will comprise the distortion and the closely knit distortion that causes in slit between them of heat-insulating block between heat-insulating block, seaming chuck and test specimen and seaming chuck between push-down head, test specimen and push-down head.Can not provide reliably and these distortion are many, the as above distortion of push-down head is measured because of sparing and be difficult to along its vertical temperature distributing disproportionation, and it is impossible basically to provide its distortion exactly.The vertical deformation magnitude many and the ultralow temperature concrete sample of these distortion simultaneously is suitable, can not ignore.Therefore, the deformation values that provides of this test test specimen ultralow temperature deformation measurement method can not reflect ultralow temperature concrete stressing conditions.
Summary of the invention
The technical matters that the present invention will solve is, provide a kind of can be easily with cryogenic testing stove shift-in or shift out loading tester, and can carry out the test unit of concrete stress performance test under the ultralow temperature state accurate and repeatablely.
For reaching above-mentioned purpose; A kind of cryogenic testing device of the present invention comprises loading tester and cryogenic testing stove, and loading tester is provided with cushion cap and following cushion cap; The following cushion cap place of said loading tester is provided with sliding rail; Sliding machine is set on the sliding rail, and said cryogenic testing stove is fixed on the sliding machine, is convenient to said cryogenic testing stove and is located in the loading tester assigned address and shifts out loading tester along sliding rail and carry out various test operations.
Cryogenic testing device of the present invention, wherein said cushion cap down is provided with the rigid body piece that has ball pivot and hydraulic jack, and this rigid body piece provides the loading surface of a uniform-compression, and ball pivot is in order test specimen to be applied an axial compression load.The rigid body piece places in the sliding rail, can or separate with the contact of sliding machine face, is convenient to testing crew and carries out various operations.
Cryogenic testing device of the present invention; The top of wherein said cryogenic testing stove and bottom are respectively equipped with seaming chuck and push-down head; Said upper and lower pressure head profile is " protruding " word shape, and a upper and lower pressure head part places in the cryogenic testing stove, and a part places outside the cryogenic testing stove.The said interior pressure head of cryogenic testing stove that places is processed by stainless steel and resin glass fibre reinforced plastics combination, promptly places the pressure head in the cryogenic testing stove to be made up of double-layer structure, is processed by stainless steel near the part of stove inner core, and another layer is processed by resin glass fibre reinforced plastics; The said outer pressure head of cryogenic testing stove that places is processed by resin glass fibre reinforced plastics fully; Resin glass fibre reinforced plastics is the compound substance of a kind of spun glass and resin; Like epoxy glass laminate, vibrin fiberglass, phenolic resin frp etc.; Have light weight, intensity height, be bordering on adiabatic characteristics, market is on sale, can choose any one kind of them to its performance requirement according to last push-down head.That is, last push-down head is such structure, and its profile is " protruding " word shape; Process by two-layer different materials combination; One deck near the trial furnace inner cylindrical portion is processed by stainless steel, and another layer is processed by resin glass fibre reinforced plastics fully, preferably adds bolt with resin between stainless steel layer and the resin glass fibre reinforced plastics layer and connects; Stainless steel layer and part resin frp layer place in the cryogenic testing stove, and remainder places outside the cryogenic testing stove.
Cryogenic testing device of the present invention; Wherein said cryogenic testing stove is a cylinder-like structure; Be followed successively by experiment work chamber (inner cylindrical portion), cold-producing medium closed cabin, vacuum layer and insulation layer from inside to outside, the concrete sample (like cube, prism, right cylinder or cylinder etc.) that will have conventional shape places and carries out the stress performance test between the indoor upper and lower pressure head of experiment work.
Cryogenic testing device of the present invention, the indoor measurement bar that is provided with of the experiment work of wherein said cryogenic testing stove, said measurement bar comprise long bar and the loss of quantity measuring staff of measuring, and seaming chuck is fixed in the wherein long upper end that measures bar, and the lower end penetrates push-down head; Loss of quantity measuring staff is positioned at the long side that measures bar, and is fixed in push-down head, and its shape is consistent in the shape at push-down head place with the long bar that measures.The ultra-low temperature surroundings distortion of test test specimen is down measured by conventional instrument outside push-down head is drawn stove through measuring bar, and the said long instrument that measures bar, loss of quantity measuring staff and connect is outward formed the deformation measurement device, and measuring bar and instrument is this area existing equipment.
Cryogenic testing device of the present invention; Also be provided with locating device and safety guard in the wherein said cryogenic testing stove; Said locating device and safety guard are fixedly mounted on respectively on the upper and lower pressure head through screw, and said locating device belongs to this area existing equipment.All can occur the explosion formula during material test such as ultralow temperature concrete and destroy, and can apply the load more than hundred tons, will put aside bigger energy during destruction; So safety in order to test; Must safety guard be set to test unit, this safety guard is a kind of thick-wall red copper tube, and is inboard attached to the airtight storehouse of cold-producing medium; Having characteristic shock-resistant, corrosion-resistant and that heat conduction is fast, also is this area existing equipment.
Cryogenic testing device of the present invention, wherein said cryogenic testing stove also is provided with furnace cradle, and furnace cradle is fixedly connected with sliding machine.
Cryogenic testing device of the present invention, wherein said loading tester are this area existing equipment, and it is provided with threaded screw rod, last cushion cap, following cushion cap, and last cushion cap directly contacts with seaming chuck, and following cushion cap then passes through sliding machine to the push-down head load application.
Cryogenic testing device of the present invention, preferred refrigerant are liquid nitrogen, and the temperature of liquid nitrogen is about-196 ℃, can satisfy the minimum temperature that xoncrete structure possibly suffer at present.The liquid nitrogen refrigerating developing agent storage is in having the function hold-up tank (existing equipment) such as explosion-proof that boosts automatically; Be connected in the airtight storehouse of cold-producing medium of cryogenic testing stove by vacuum tube; Through control device (this area existing equipment) with intelligence programming function; The amount and the speed of the input of control cold-producing medium, thus reach the needed various ultralow temperature situations of change of test.
The application of the above-mentioned cryogenic testing device of the present invention; Use it in the test of concrete ultralow temperature stress performance; (as be lower than the condensing temperature-165 ℃ of rock gas, the temperature range of this test unit can be from normal temperature to-196 ℃, and this minimum temperature value generally depends on cold-producing medium to concrete ultralow temperature state; As adopt liquid nitrogen to make cold-producing medium, then can reach-196 ℃.In addition, this minimum temperature value also depends on the setup parameter of equipment such as trial furnace and last push-down head) stress performance make an experiment.Said stress performance depends on different actual engineering structures to the requirement of concrete cryogenic property, as: the corresponding intensity of various low-temperature values under the normal condition, the intensity under the different rate of temperature fall, the various intensity of cooling (freeze thawing) repeatedly; Dilatational strain under the various low temperature, elastic modulus, stress-strain relation, and the stress performance under given low temperature and each approach of stress etc.
The present invention compared with prior art has following advantage:
(1) the present invention with cryogenic testing stove on-fixed on loading tester; The following cushion cap place that is loading tester is provided with sliding rail; Can be easily with cryogenic testing stove shift-in or shift out loading tester; And be located in the testing machine loading position exactly, reduced the uncertainty in the operating process, improved experimental test result's accuracy.
(2) pressure head processed of the pressure head of this test unit and homogenous material in the past is different; It is provided with two-part structure; Place the pressure head in the cryogenic testing stove to process, place the outer pressure head of cryogenic testing stove then to process by resin glass fibre reinforced plastics fully by stainless steel and resin glass fibre reinforced plastics combination.It satisfies under the ultralow temperature material especially concrete equal strength and the bigger prerequisite characteristics of material stress performance testing requirements pressure head of rigidity: 1. strength and stiffness will be much larger than the test test specimen.2. good endurance.Under regular ultralow temperature to normal temperature ringing, its stress performance changes very little, thus the influence of test findings is ignored, and its surface is not because of the cold service corrosion.3. be similar to heat guard, can block the transmission of thermal source, make experiment work chamber and the outside environment of last push-down head in the trial furnace be easy to realize the testing requirements of being scheduled to.4. be convenient to be connected securely with various test units such as experimental safe protective device, deformation measurement device and test specimen automatic positioning equipment etc.5. light weight is convenient to the handling safety of test operation and testing crew, because testing crew contact pressure head is its resin glass fibre reinforced plastics part, because of its Cryo Heat Insulation performance, has guaranteed that testing crew avoids suffering the possible ultralow temperature incident of burning to take place.
(3) take airtight cold-producing medium storehouse can guarantee preferably that test specimen is in the uniform predetermined low temperature level environment in the trial furnace; And can preset experiment work chamber worst cold case in the trial furnace, overcome experiment work chamber in the trial furnace in the process of the test and directly fill comparatively accurately control problem of temperature that cold-producing medium causes.
(4) also be provided with locating device, safety guard and deformation measurement device in the cryogenic testing stove; The position of confirmed test test specimen between last push-down head easily; Device avoids testing the damage of test specimen explosion formula destruction in protection cryogenic testing stove and the stove thereof; Conveniently measure the test piece deformation amount exactly, test can be repeated, guarantee the accurate of measurement.
Below in conjunction with accompanying drawing cryogenic testing device of the present invention is described further.
Description of drawings
Fig. 1 is a cryogenic testing device of the present invention, the structural representation under the non-trystate;
Fig. 2 is a cryogenic testing device of the present invention, following cushion cap place structural representation;
Fig. 3 is the structural representation of cryogenic testing stove in the cryogenic testing device of the present invention;
Fig. 4 is the structural representation of seaming chuck or push-down head in the cryogenic testing stove;
Fig. 5 is seaming chuck or each screwhole position distribution schematic diagram of push-down head in the cryogenic testing stove;
Fig. 6 is concrete stress strain curve figure under the different low temperature.
Description of reference numerals: 1-loading tester; 2-cryogenic testing stove; The 3-seaming chuck; The 4-push-down head; 5-experiment work chamber; 6-cold-producing medium pressurized capsule; The 7-vacuum layer; 8-insulation layer; The 9-stainless steel; The 10-resin glass fibre reinforced plastics; The 11-handle; 12 sliding rails; 13-tests test specimen; The 14-sliding machine; The last cushion cap of 15-; The 16-leading screw; The long bar that measures of 17-; The 18-hydraulic jack; The 19-furnace cradle; The 20-bolt; The 22-locating device connects screw; The 23-safety guard connects screw; 24-measures bar and connects screw; Cushion cap under the 25-; 26-rigid body piece.
Embodiment
Below in conjunction with accompanying drawing and embodiment, do more detailed explanation with other technical characterictic and advantage to the present invention is above-mentioned.
To shown in Figure 3, cryogenic testing device of the present invention comprises loading tester 1 and cryogenic testing stove 2 like Fig. 1; Loading tester 1 is provided with cushion cap 15 and following cushion cap 25; Following cushion cap 25 is provided with the rigid body piece 26 of dribbling hinge and hydraulic jack 18, and following cushion cap 25 places are provided with sliding rail 12, and rigid body piece 26 places in the sliding rail 12; Rigid body piece 26 can or separate with 14 contacts of sliding machine; Sliding rail 12 is provided with sliding machine 14, and cryogenic testing stove 2 is fixed on the sliding machine 14 through furnace cradle 19, and furnace cradle also provides accommodation space for measuring instrument simultaneously.
Like Fig. 3 and shown in Figure 4; Cryogenic testing stove 2 is a cylinder-like structure; Its top and bottom are respectively equipped with the seaming chuck 3 and push-down head 4 of profile for " protruding " font, and upper and lower pressure head 3,4 parts place in the cryogenic testing stove 2, and a part places outside the cryogenic testing stove 2; Wherein place the pressure head in the cryogenic testing stove to process, place the outer pressure head of cryogenic testing stove then to process by resin glass fibre reinforced plastics 10 fully by stainless steel 9 and resin glass fibre reinforced plastics 10 combinations.This cryogenic testing stove 2 is followed successively by experiment work chamber 5, cold-producing medium closed cabin 6, vacuum layer 7 and insulation layer 8 from inside to outside, and wherein the experiment work chamber is fine and have the red copper material that stronger anti-test specimen destroys the impact force action that produces and process by heat transfer property; The airtight storehouse of cold-producing medium is cylindric, and thick 50mm is processed by stainless steel, fills liquid nitrogen in the storehouse; The airtight storehouse of vacuum layer around cooler, thick 20mm is also processed by stainless steel; The insulation layer is around vacuum layer, and thick 40mm is filled by common thermal insulation material.Be provided with in the experiment work chamber 5 and measure bar and test test specimen 13; Measure bar and comprise long bar 17 and the loss of quantity measuring staff of measuring, as shown in Figure 3, seaming chuck 3 is fixed in the wherein long upper end that measures bar 17; The lower end penetrates push-down head 4; Loss of quantity measuring staff is arranged in the long rear side (figure does not mark) that measures bar 17, and loss of quantity measuring staff is fixed in push-down head 4, and its shape is consistent in the shape at push-down head place with the long bar that measures.Also be provided with handle 11 on the seaming chuck 3, make things convenient for seaming chuck to put into before 3 on-tests and finish and afterwards take out.
Like Fig. 4 and shown in Figure 5; Between the stainless steel 9 of upper and lower pressure head 3,4 and the resin glass fibre reinforced plastics 10 with fixing with bolt 20 again after resin-bonded; As shown in Figure 5; Upper and lower pressure head 3,4 directly partly is provided with a plurality of screws with the test specimen surface of contact, and the protective device that the locating device that is respectively mounting and positioning device connects screw 22, protection device for installing connects the measurement bar connection screw 24 of screw 23, installation measuring staff.Promptly; Also be provided with automatic positioning equipment and safety guard (not marking among the figure) in the cryogenic testing stove 2; Said apparatus is this area existing equipment, as being provided by the high low-temperature concrete Study on behavior of department of civil engineering, Tsinghua university group, can use after the Installation and Debugging.
During test, at first cryogenic testing stove 2 is shifted out loading tester 1 through sliding machine 14.In the bottom of trial furnace 2 push-down head is installed earlier; (its shape also can be right cylinder or cylinder with the test test specimen 13 of prism shape again; Its size can change according to testing requirements, but largest cross-sectional sized must not be greater than the experiment work chamber 5 corresponding sizes of cryogenic testing stove 2) by cryogenic testing stove 2 stoves of putting into suitable for reading.Locating device, deflection measuring staff and safety guard are installed on the seaming chuck 3 through corresponding screw; This seaming chuck 3 is fixedly mounted on the top of cryogenic testing stove 2; Testing test specimen 13 this moment will make it be in the uniaxial force position of push-down head in the trial furnace by the locating device automatic centering of leading.
Cryogenic testing stove 2 is pushed in the loading tester 1; Make down push-down head 4 correspondences of cryogenic testing stove 2 on rigid body piece 26 and the sliding machine 14 on the cushion cap 25; Test test specimen 13 and will just in time be positioned at loading position this moment; Do not need ad hoc to carry out centering, promptly the length of sliding rail 12, the down design of the position etc. of cushion cap 25, rigid body piece 26 make test test specimen 13 just in time be positioned at the loading position of loading tester 1.The outer instrument of cryogenic testing stove is installed; This instrument market is on sale, and (general deformation measurement production company all has; Fly electronic engineering instrument plant, Danyang City dragon space civil engineering work instrument plant, Changsha Xiang sky electronics technology company limited, Shenzhen Miran Technology Co., Ltd. etc. earlier like Jintan City); Instrument is connected with the measurement bar; And be connected with the intelligent data acquisition plate with acquisition software computing machine (as detecting Science and Technology Ltd., the defeated strong instrument company of power of Britain, west, Shaanxi ADT electronics Ltd etc.) available from Hunan five boats; Open refrigerant storage jar (as opening up ultra outstanding experimental apparatus company limited of instrument and equipment company limited, Sichuan Ya Xi Cryo Equipment company, Shenzhen, monarch Fang Ke appearance development in science and technology company limited etc.) gate simultaneously available from last oceanic rise; Start control device with intelligence programming function (as winning inferior electrical technology company limited, west, Luoyang water chestnut automation equipment company limited, the special cool equipment in river, Shenzhen this this company limited etc.) available from east, Beijing; And carry out corresponding setting according to testing requirements; Make an experiment behind the device each several part preliminary examination no problem, lower the temperature and load according to the operating mode of testing requirements, and through computer real-time ground gather, show, monitoring and storage data.
After concrete sample cooling and load test finish; Close refrigerant storage jar gate and control device with intelligence programming function; Trial furnace is shifted out loading tester through sliding machine, remove measuring instrument, take out seaming chuck; Test test specimen collapse state is taken pictures, take out from the cryogenic testing stove with special-purpose cryogenic glove then and destroy test specimen.
Test Example: concrete low temperature stress-strain relation test
The test material for test is a concrete, strength grade C60, and it is shaped as prism, size 100mm * 100mm * 300mm.At first will test test specimen and put into trial furnace, and settle seaming chuck again, test test specimen autofitting push-down head assigned address on trial furnace this moment, pushes away trial furnace then to loading tester.Instrument then is installed, is connected in intelligent data acquisition plate and computing machine, and trial furnace is connected in the storage liquid nitrogen container with transfusion nitrogen vacuum tube, each equipment of check test device or parts are successively opened transfusion nitrogen valve and its intelligence programming control device afterwards.Destroy when the test test specimen reaches to specify cooling value (like-40 ℃ ,-80 ℃ ,-120 ℃ and-180 ℃ etc.) and keep this temperature value after 48 hours the test test specimen to be loaded on test specimen, gather loaded value and the changing value of test piece deformation in the whole loading process simultaneously.Fig. 6 is the concrete stress strain curve of C60 under each worst cold case that writes down in the process of the test, can find out, although all identical test test specimen of normal temperature stress performance, the stress strain curve under the different cold service operating modes also is different; Test unit of the present invention can accurately and can repeat under low-temperature condition, concrete to be carried out the stress performance test.Take pictures to testing the test specimen collapse state, the test test specimen destroyed and all has violent cracker and be broken shape when temperature was low, but the pressurized end still is cone-shaped about the test specimen, and this shows that test specimen centering is better, can know that the test test specimen is an axial compression.Test test specimen residue places room temperature after 20 minutes, makes its surface play thicker frost because test specimen residue inner cryogenic leaks.
Above-described embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (9)
1. cryogenic testing device; Comprise loading tester and cryogenic testing stove; Loading tester is provided with cushion cap and following cushion cap; It is characterized in that: the following cushion cap place of said loading tester is provided with sliding rail, and sliding machine is set on the sliding rail, and said cryogenic testing stove is fixed on the sliding machine.
2. cryogenic testing device according to claim 1 is characterized in that: said cushion cap down is provided with the rigid body piece that has ball pivot and hydraulic jack, and the rigid body piece places in the sliding rail.
3. cryogenic testing device according to claim 1; It is characterized in that: the top of said cryogenic testing stove and bottom are respectively equipped with seaming chuck and push-down head; Said upper and lower pressure head profile is " protruding " word shape; All some places in the cryogenic testing stove upper and lower pressure head, and a part places outside the cryogenic testing stove.
4. cryogenic testing device according to claim 3 is characterized in that: the said interior pressure head of cryogenic testing stove that places is processed by stainless steel and resin glass fibre reinforced plastics combination, and the said outer pressure head of cryogenic testing stove that places is processed by resin glass fibre reinforced plastics.
5. cryogenic testing device according to claim 1 is characterized in that: said cryogenic testing stove is a cylinder-like structure, is followed successively by experiment work chamber, cold-producing medium closed cabin, vacuum layer and insulation layer from inside to outside.
6. cryogenic testing device according to claim 5 is characterized in that: the indoor measurement bar that is provided with of the experiment work of said cryogenic testing stove, said measurement bar comprise long bar and the loss of quantity measuring staff of measuring; Seaming chuck is fixed in the said long upper end that measures bar, and the lower end penetrates push-down head; Said loss of quantity measuring staff is fixed in push-down head.
7. cryogenic testing device according to claim 5 is characterized in that: said cryogenic testing stove is provided with furnace cradle, and furnace cradle is fixedly connected with sliding machine.
8. cryogenic testing device according to claim 1 is characterized in that: also be provided with locating device and safety guard in the said cryogenic testing stove, said locating device and safety guard are fixedly mounted on respectively on the upper and lower pressure head through screw.
9. the application of each described cryogenic testing device of claim 1-8 is characterized in that: use it for the test of concrete ultralow temperature stress performance.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063526A (en) * | 2012-12-27 | 2013-04-24 | 天津大学 | Auxiliary device for experiments of behavior of concrete under axial loading at ultra low temperature |
| CN103543767A (en) * | 2012-07-16 | 2014-01-29 | 东北林业大学 | Temperature control device for measurement on modulus of elasticity in static bending of wood |
| CN103674725A (en) * | 2013-12-12 | 2014-03-26 | 中国建筑股份有限公司 | Concrete splitting strength test device and concrete splitting strength test method in ultra-low-temperature environment |
| CN104359768A (en) * | 2014-10-24 | 2015-02-18 | 天津大学 | Testing device for flexural property of concrete beam at ultralow temperature |
| CN104534972A (en) * | 2014-12-31 | 2015-04-22 | 天津大学 | Ultra-low-temperature concrete strain measurement testing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2514336Y (en) * | 2001-12-13 | 2002-10-02 | 中国科学院武汉岩土力学研究所 | Double down-pressing plate type pressure-bearing device for rock three-shaft experiment instrument |
| CN2795844Y (en) * | 2004-08-10 | 2006-07-12 | 中国科学院寒区旱区环境与工程研究所 | Low temperature high pressure three shaft creep test instrument |
| CN2932367Y (en) * | 2005-07-27 | 2007-08-08 | 马骉 | Asphalt mixture low-temperature breaking tester |
| CN202002925U (en) * | 2011-03-25 | 2011-10-05 | 安徽理工大学 | Low temperature box for testing mechanical performance of artificially frozen soil |
| CN202433261U (en) * | 2011-12-31 | 2012-09-12 | 中国寰球工程公司 | Ultralow-temperature tester |
-
2011
- 2011-12-31 CN CN201110459894.7A patent/CN102519804B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2514336Y (en) * | 2001-12-13 | 2002-10-02 | 中国科学院武汉岩土力学研究所 | Double down-pressing plate type pressure-bearing device for rock three-shaft experiment instrument |
| CN2795844Y (en) * | 2004-08-10 | 2006-07-12 | 中国科学院寒区旱区环境与工程研究所 | Low temperature high pressure three shaft creep test instrument |
| CN2932367Y (en) * | 2005-07-27 | 2007-08-08 | 马骉 | Asphalt mixture low-temperature breaking tester |
| CN202002925U (en) * | 2011-03-25 | 2011-10-05 | 安徽理工大学 | Low temperature box for testing mechanical performance of artificially frozen soil |
| CN202433261U (en) * | 2011-12-31 | 2012-09-12 | 中国寰球工程公司 | Ultralow-temperature tester |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103543767A (en) * | 2012-07-16 | 2014-01-29 | 东北林业大学 | Temperature control device for measurement on modulus of elasticity in static bending of wood |
| CN103543767B (en) * | 2012-07-16 | 2016-06-22 | 东北林业大学 | The attemperating unit that wood-bending elastic modelling quantity is measured |
| CN103063526A (en) * | 2012-12-27 | 2013-04-24 | 天津大学 | Auxiliary device for experiments of behavior of concrete under axial loading at ultra low temperature |
| CN103674725A (en) * | 2013-12-12 | 2014-03-26 | 中国建筑股份有限公司 | Concrete splitting strength test device and concrete splitting strength test method in ultra-low-temperature environment |
| CN103674725B (en) * | 2013-12-12 | 2016-09-07 | 中国建筑股份有限公司 | The device of concrete splitting strength test and test method under a kind of ultra-low temperature surroundings |
| CN104359768A (en) * | 2014-10-24 | 2015-02-18 | 天津大学 | Testing device for flexural property of concrete beam at ultralow temperature |
| CN104534972A (en) * | 2014-12-31 | 2015-04-22 | 天津大学 | Ultra-low-temperature concrete strain measurement testing device |
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| CN102519804B (en) | 2014-01-22 |
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