CN105628512A - Test box and system capable of simulating mechanical property of test piece under freeze-thaw temperature load - Google Patents
Test box and system capable of simulating mechanical property of test piece under freeze-thaw temperature load Download PDFInfo
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- CN105628512A CN105628512A CN201610167584.0A CN201610167584A CN105628512A CN 105628512 A CN105628512 A CN 105628512A CN 201610167584 A CN201610167584 A CN 201610167584A CN 105628512 A CN105628512 A CN 105628512A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses a test box and a system capable of simulating the mechanical property of a test piece under a freeze-thaw temperature load. The test box comprises a box body, a refrigeration device arranged in the box body, and an atomized liquid inlet formed in the box wall of the box body or an atomization device arranged in the box body. The system comprises the test box and a stress loading device. According to the test box and the system provided by the invention, a stress environment closer to that in a usage state of the test piece can be simulated, so that the detection efficiency is high and a detection result is accurate according to the scheme provided by the invention.
Description
Technical field
The present invention relates to test specimen mechanical property experiment device technical field, particularly relate to a kind of proofing box and the system of simulating test specimen mechanical property under freeze thawing temperature loading.
Background technology
Freeze thawing, refers to that soil layer drops to sub-zero zero due to temperature and rises to more than zero degree and produce a kind of physico-geological function of freezing and melting and phenomenon. China belongs to seasonal frozen ground types more, and winter freezes, and summer melts, and rock fracture two wall is just produced huge pressure by ice; And when temperature gos up, ice just melts, the pressure that two walls are subject to is die-offed, and two walls push away back to central authorities then. In the anti-thermal exchange covered, the crack of rock will expand, increase, so that stone is out divided, and unfreezing is in this kind of effect.
But the various complicated loading action (static load and alternate load) of the various component recipients being in freezing-thawing. In fact the component of freezing and defrosting area it is subject within 1 year, to suffer a freeze-thaw cycle, in order to reduce the test period to territory, tabetisol component mechanical property of enduring cold, prior art adopts the method for Reality simulation environment, for the mechanical property simulated fast under component freeze thawing temperature loading.
The method that concrete member carries out fatigue test at present under freeze thawing state is mainly, and concrete member is carried out freeze-thaw cycle, after completing set number of times freeze-thaw cycle, then takes out this component, be placed on fatigue test device, carry out Fatigue Test; Then making component naturally thaw, temperature rises to more than zero degree, then carries out Fatigue Test, and this kind of way can only realize the Fatigue Test after concrete member freeze thawing, cannot carry out in real time, and therefore, test result is not accurate enough, and practical implementation causes very big error.
Summary of the invention
In experimentation for test specimen mechanical property in frozen-thaw process in above-mentioned prior art, test result is not accurate enough, practical implementation causes the problem of very big error, and the present invention provides a kind of proofing box and the system of simulating test specimen mechanical property under freeze thawing temperature loading.
Provided by the invention a kind of simulate test specimen mechanical property under freeze thawing temperature loading proofing box and system dealt with problems by following technical essential: a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading, the refrigeration plant comprising box-like body, being arranged in box-like body, also comprises the atomized liquid entrance being arranged on box-like body case wall or the atomisation unit being arranged in box-like body.
Concrete, whether band corrosion property is very big on the weather resistance impact of component for the various complicated loading action of the various component recipients being in freezing-thawing: while power load and alternate load, humidity level in air and acid rain etc. For the mechanical property tests of test specimen under freeze thawing temperature loading in prior art, time respectively more than test specimen is in less than 0 DEG C and 0 DEG C, carry out stress loading respectively, lowered the temperature by intensification repeatedly, complete the mechanics performance determining of test specimen under final freeze thawing temperature loading. Above process not only efficiency low, compared to the actual working environment of test specimen, the stressing conditions of test specimen under differing temps can not be simulated really, do not consider other factors except temperature to the impact of test specimen mechanical property, the corrodibility etc. of environment medium residing for the humidity of environment, test specimen as residing for test specimen.
In above proofing box technical scheme, the box-like body arranged is used as accommodating underproof test specimen, the refrigeration plant being arranged in box-like body is for freezing to the environment in box-like body, with the low temperature environment obtained in frozen-thaw process, simultaneously by the power of the start and stop of control refrigeration plant or control refrigeration plant, the variation of ambient temperature in box-like body can be made and under test specimen actual working environment, the temperature variation of frozen-thaw process adapts, like this, by the proofing box provided above, in the process of test specimen temperature variation, the stress-loaded being applied on test specimen can be made to exist at any time, like this, the true environment that the experimental situation of above test specimen to be worked closer to the time, the accuracy being beneficial under freeze thawing temperature loading test specimen simulation on Mechanical, it is beneficial to the efficiency and convenience that improve test specimen simulation on Mechanical under freeze thawing temperature loading.
Further, the case wall of above box-like body is provided with atomized liquid entrance or atomisation unit is set in box-like body, atomized liquid is generated into atomized liquid or by atomisation unit by leading in box-like body by atomized liquid entrance, the way of ambient moisture residing for test specimen in box-like body is changed so that environment residing for test specimen is closer to the true environment in test specimen working process in different time points.
Further, the atomized liquid more than led to or the atomized liquid directly generated in box-like body, the raw material of atomized liquid is according to the needs of test specimen, acidic liquid, alkaline liquid, other corrosive mediums etc. can be adopted, so that when changing experimental situation humidity residing for test specimen, the acidity of experimental situation, alkalescence, corrodibility etc. residing for change test specimen, so that experimental situation is closer to Working environment residing for test specimen, reach the object promoting further test specimen simulation on Mechanical accuracy under freeze thawing temperature loading.
As those skilled in the art; above atomized liquid entrance is essentially flow of fluid passage; like this; above atomized liquid entrance is as the logical entrance of gas; concrete mechanical property under the concrete freeze thawing temperature loading of reinforcing bar is contained as simulated sodium chloride electrolysis alkaline workshop; leading to by atomized liquid entrance and carry out test specimen mechanical property tests into chlorine, also should be contained within the protection domain of this case, namely above atomized liquid entrance also can be used as gas or gas-liquid mixture fluid admission port. Like this, above atomized liquid entrance can external air pump or external atomisation unit, the ultrasonic atomizer that the atomisation unit being arranged in box-like body or external atomisation unit can adopt volume less.
A kind of the technical scheme that the proofing box of test specimen mechanical property is further under freeze thawing temperature loading is simulated as above-described:
For ease of in time, adjust the humidity and temperature in box-like body efficiently, accurately, described box-like body case wall is also provided with dry gas entrance and convection of air hole. Above dry gas entrance for leading to into dry gas in box-like body, and above convection of air hole is used for box-like body and is vented from the inside to the outside.
For ease of operator's observation experiment process, the local of described box-like body is also provided with the printing opacity plate as box-like body case wall. Above printing opacity plate can adopt transparent plastics or sheet glass etc.
As the specific implementation form of refrigeration plant, described refrigeration plant is the cold fluid pipe being arranged on box-like body case wall, and described cold fluid pipe is used for by cold fluid, in cold fluid flow in the process of cold fluid pipe, absorbs the heat in box-like body cavity. Above cold fluid pipe preferably adopts the metal tube having good heat conductive performance and having better intensity, and such as copper pipe, above cold fluid can adopt liquid nitrogen. Adopt the refrigeration plant of above form, proofing box can be made to have smaller size smaller and weight, under the experimental model being subject to repeated stress with whole proofing box, to reduce the requirement of corresponding force loading device.
As a kind of temperature-controllable in box-like body is good, cold fluid utilization ratio is high concrete scheme, the case wall of described box-like body is sandwich type structure, described refrigeration plant is arranged in the interlayer of box-like body case wall, also comprise the gas inlet and pneumatic outlet that are connected with described interlayer, described gas inlet is for connecting gas source, and described pneumatic outlet communicates with the inner chamber of box-like body. In this scheme, by leading in sandwich structure into gas by gas inlet, the cooled device of gas heat part enters into box-like body inside after absorbing, and reaches the object regulating temperature in box-like body.
Due in test specimen practical work process, temperature approximately equal around test specimen, test specimen for ease of obtaining in experimentation is in an isothermal environment, be beneficial to improve simulated experiment data can referential, also comprising the air circulation device being arranged at box-like body inside, described air circulation device is used for the even mixed of box-like body inner air.
Simultaneously, the invention also discloses a kind of system simulating test specimen mechanical property under freeze thawing temperature loading, this system comprises stress loading device, also comprises in above scheme the proofing box provided, and the test specimen inboardend of described stress loading device is positioned at box-like body inside.
In a kind of system simulating test specimen mechanical property under freeze thawing temperature loading more than arranged, the stress loading device arranged for applying to need the stress of simulation on test specimen, above stress loading device for loading tensile stress, stress, repeated stress etc. on test specimen, as adopted pneumatic cylinder, the piston rod end of hydro-cylinder act on test specimen, adopt by PZT (piezoelectric transducer), displacement amplifier series connection, the stress loading device etc. that supersonic signal generator forms as PZT (piezoelectric transducer) electric energy input unit. Above system can in imitation specimen frozen-thaw process test specimen temperature variation process in test specimen is applied stress, compared to existing apparatus, owing to closer to test specimen real operating environments, native system test result is accurate, test efficiency height.
A kind of the technical scheme that the system of test specimen mechanical property is further under freeze thawing temperature loading is simulated as the above:
For ease of temperature detection and/or the Humidity Detection of box-like body internal medium, also comprise the survey temperature portion and/or moisture content measurement portion that are arranged at box-like body inside. More than survey temperature portion and moisture content measurement portion can adopt temperature sensor or humidity sensor respectively, with direct output digit signals or simulating signal, utilize above signal feedback, act on some functional component of native system, it is achieved the automatic operating of native system.
For promoting the firm property that test specimen is fixing and avoid the situations such as or eccentric force concentrated because of test specimen upper stress, affect the accuracy of mechanical property experimental results under test specimen freeze thawing temperature loading, the test specimen inboardend of described stress loading device is also provided with ball-joint seat, described ball-joint seat comprises ball seat, spheroid, compress bar and check nut, described ball seat is provided with spherical groove, described spheroid is embedded in spherical groove, compressing bar is fixed on spheroid, and compression bar is provided with the thread segment for being threaded with the test specimen inboardend of stress loading device, the check nut being also threaded on described thread segment and being fixedly connected with the test specimen inboardend of stress loading device for realizing compression bar, described spheroid is arranged in spherical groove, and spheroid can rotate around self centre of sphere.
On above ball-joint seat, distance between the test specimen inboardend compressing bar change stress loading device by rotating and test specimen, realize compressing being fixedly connected with of the test specimen inboardend of bar with stress loading device by above check nut, the form that spheroid can rotate in spherical groove, it is convenient to change the angle of inclination of ball seat relative to test specimen, with at the point of application obtaining ball seat and test specimen the best, above point of application upper ball base can adopt with test specimen and directly contact, the other end of test specimen and box-like body interact test specimen is applied static stress, examination is to carry out fatigue test, preferably disassemble described ball-joint seat, adopt the form that test specimen is fixedly connected with stress loading device.
Further, preferably arrange two in box-like body inside to become just to the ball-joint seat of relation, one of them ball-joint seat is connected with stress loading device, another ball-joint seat is connected with box-like body, with the mechanical property test that test specimen is fixed between two ball-joint seats to carry out in freeze thawing temperature loading situation test specimen.
As technical scheme pressure loading device can lowered the temperature, it is beneficial to extend the work-ing life of native system, also comprises the refrigeration system carrying out for corresponding force loading device cooling.
The present invention has following useful effect:
The proofing box that invention provides and system, in above proofing box technical scheme, the box-like body arranged is used as accommodating underproof test specimen, the refrigeration plant being arranged in box-like body is for freezing to the environment in box-like body, with the low temperature environment obtained in frozen-thaw process, simultaneously by the power of the start and stop of control refrigeration plant or control refrigeration plant, the variation of ambient temperature in box-like body can be made and under test specimen actual working environment, the temperature variation of frozen-thaw process adapts, like this, by the proofing box provided above, in the process of test specimen temperature variation, the stress-loaded being applied on test specimen can be made to exist at any time, like this, the true environment that the experimental situation of above test specimen to be worked closer to the time, the accuracy being beneficial under freeze thawing temperature loading test specimen simulation on Mechanical, it is beneficial to the efficiency and convenience that improve test specimen simulation on Mechanical under freeze thawing temperature loading.
Further, the case wall of above box-like body is provided with atomized liquid entrance or atomisation unit is set in box-like body, atomized liquid is generated into atomized liquid or by atomisation unit by leading in box-like body by atomized liquid entrance, the way of ambient moisture residing for test specimen in box-like body is changed so that environment residing for test specimen is closer to the true environment in test specimen working process in different time points.
Further, the atomized liquid more than led to or the atomized liquid directly generated in box-like body, the raw material of atomized liquid is according to the needs of test specimen, acidic liquid, alkaline liquid, other corrosive mediums etc. can be adopted, so that when changing experimental situation humidity residing for test specimen, the acidity of experimental situation, alkalescence, corrodibility etc. residing for change test specimen, so that experimental situation is closer to Working environment residing for test specimen, reach the object promoting further test specimen simulation on Mechanical accuracy under freeze thawing temperature loading.
In the system more than arranged, the stress loading device arranged for applying to need the stress of simulation on test specimen, above stress loading device for loading tensile stress, stress, repeated stress etc. on test specimen, as adopted pneumatic cylinder, the piston rod end of hydro-cylinder act on test specimen, adopt by PZT (piezoelectric transducer), displacement amplifier series connection, the stress loading device etc. that supersonic signal generator forms as PZT (piezoelectric transducer) electric energy input unit. Above system can in imitation specimen frozen-thaw process test specimen temperature variation process in test specimen is applied stress, compared to existing apparatus, owing to closer to test specimen real operating environments, native system test result is accurate, test efficiency height.
Accompanying drawing explanation
Fig. 1 is a kind of sectional view simulating a system specific embodiment of test specimen mechanical property under freeze thawing temperature loading of the present invention;
Fig. 2 is a kind of front view simulating a system specific embodiment of test specimen mechanical property under freeze thawing temperature loading of the present invention;
Fig. 3 is in a kind of system specific embodiment simulating test specimen mechanical property under freeze thawing temperature loading of the present invention, the structural representation of ball-joint seat;
Fig. 4 is the system topological figure that a kind of described in embodiment 5 simulates a system specific embodiment of test specimen mechanical property under freeze thawing temperature loading.
Numbering in figure is followed successively by: 1, refrigeration plant, and 2, power control section, 3, printing opacity plate, 4, temperature portion is surveyed, 5, air circulation device, 6, ball-joint seat, 61, ball seat, 62, spheroid, 63, compress bar, 64, check nut, 7, test specimen, 8, box-like body, 9, stress loading device, 10, atomized liquid entrance, 11, dry gas entrance, 12, convection of air hole, 13, atomisation unit, 14, forced air drying device.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but the structure of the present invention is not limited only to following examples.
Embodiment 1:
As shown in Figure 1 to Figure 2, a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading, the refrigeration plant 1 comprise box-like body 8, being arranged in box-like body 8, also comprises the atomized liquid entrance 10 being arranged on box-like body 8 casees walls or the atomisation unit 13 being arranged in box-like body 8.
Concrete, whether band corrosion property is very big on the weather resistance impact of component for the various complicated loading action of the various component recipients being in freezing-thawing: while power load and alternate load, humidity level in air and acid rain etc. For the mechanical property tests of test specimen 7 under freeze thawing temperature loading in prior art, stress loading is carried out respectively when being at test specimen 7 respectively more than less than 0 DEG C and 0 DEG C, lowered the temperature by intensification repeatedly, complete the mechanics performance determining of test specimen 7 under final freeze thawing temperature loading. Above process not only efficiency low, compared to the actual working environment of test specimen 7, the stressing conditions of test specimen 7 under differing temps can not be simulated really, do not consider other factors except temperature to the impact of test specimen 7 mechanical property, the corrodibility etc. of environment medium residing for the humidity of environment, test specimen 7 as residing for test specimen 7.
In above proofing box technical scheme, the box-like body 8 arranged is used as accommodating underproof test specimen 7, the refrigeration plant 1 being arranged in box-like body 8 is for freezing to the environment in box-like body 8, with the low temperature environment obtained in frozen-thaw process, simultaneously by the power of the start and stop of control refrigeration plant 1 or control refrigeration plant 1, the variation of ambient temperature in box-like body 8 can be made and under test specimen 7 actual working environment, the temperature variation of frozen-thaw process adapts, like this, by the proofing box provided above, in the process of test specimen 7 temperature variation, the stress-loaded being applied on test specimen 7 can be made to exist at any time, like this, the true environment that the experimental situation of above test specimen 7 to be worked closer to the time, the accuracy being beneficial under freeze thawing temperature loading test specimen 7 simulation on Mechanical, it is beneficial to the efficiency and convenience that improve test specimen 7 simulation on Mechanical under freeze thawing temperature loading.
Further, the case wall of above box-like body 8 is provided with atomized liquid entrance 10 or atomisation unit 13 is set in box-like body 8, atomized liquid is generated into atomized liquid or by atomisation unit 13 by leading in box-like body 8 by atomized liquid entrance 10, the way of ambient moisture residing for test specimen 7 in box-like body 8 is changed so that environment residing for test specimen 7 is closer to the true environment in test specimen 7 working process in different time points.
Further, more than lead to into atomized liquid or the atomized liquid of directly generation box-like body 8 in, the raw material of atomized liquid is according to the needs of test specimen 7, acidic liquid, alkaline liquid, other corrosive mediums etc. can be adopted, so that when changing experimental situation humidity residing for test specimen 7, the acidity of experimental situation, alkalescence, corrodibility etc. residing for change test specimen 7, so that experimental situation is closer to Working environment residing for test specimen 7, reach the object promoting further test specimen 7 simulation on Mechanical accuracy under freeze thawing temperature loading.
As those skilled in the art; above atomized liquid entrance 10 is essentially flow of fluid passage; like this; above atomized liquid entrance 10 is as the logical entrance of gas; concrete mechanical property under the concrete freeze thawing temperature loading of reinforcing bar is contained as simulated sodium chloride electrolysis alkaline workshop; leading to by atomized liquid entrance 10 and carry out test specimen 7 mechanical property tests into chlorine, also should be contained within the protection domain of this case, namely above atomized liquid entrance 10 also can be used as gas or gas-liquid mixture fluid admission port. Like this, above atomized liquid entrance 10 can external air pump or external atomisation unit 13, the ultrasonic atomizer that the atomisation unit 13 being arranged in box-like body 8 or external atomisation unit 13 can adopt volume less.
In the present embodiment, adopt the form that atomized liquid entrance 10 is set on box-like body 8, i.e. external atomisation unit 13 on box-like body 8.
Embodiment 2:
As shown in Figure 1 to Figure 2, the present embodiment is further qualified on the basis of embodiment 1: for ease of in time, adjust the humidity and temperature in box-like body 8 efficiently, accurately, described box-like body 8 casees walls are also provided with dry gas entrance 11 and convection of air hole 12. Above dry gas entrance 11 for leading to into dry gas in box-like body 8, and above convection of air hole 12 is vented from the inside to the outside for box-like body 8. In this scheme, described dry gas entrance 11 connects forced air drying device 14, forced air drying device 14 comprises air compressor and drying chamber, the outlet of described air compressor is connected with the entrance of drying chamber, the filler of promising alumina particle is set in drying chamber, also being provided with heating alumina regenerating unit on drying chamber, the outlet of drying chamber is connected with dry gas entrance 11.
For ease of operator's observation experiment process, the local of described box-like body 8 is also provided with the printing opacity plate 3 as box-like body 8 casees walls. Above printing opacity plate 3 can adopt transparent plastics or sheet glass etc.
As the specific implementation form of refrigeration plant 1, the cold fluid pipe of described refrigeration plant 1 for being arranged on box-like body 8 casees walls, described cold fluid pipe is used for by cold fluid, in cold fluid flow in the process of cold fluid pipe, absorbs the heat in box-like body 8 cavity. Above cold fluid pipe preferably adopts the metal tube having good heat conductive performance and having better intensity, and such as copper pipe, above cold fluid can adopt liquid nitrogen. Adopt the refrigeration plant 1 of above form, proofing box can be made to have smaller size smaller and weight, under the experimental model being subject to repeated stress with whole proofing box, to reduce the requirement of corresponding force loading device 9.
As a kind of concrete scheme that temperature-controllable in box-like body 8 is good, high to cold fluid utilization ratio, the case wall of described box-like body 8 is sandwich type structure, described refrigeration plant 1 is arranged in the interlayer of box-like body 8 casees walls, also comprise the gas inlet and pneumatic outlet that are connected with described interlayer, described gas inlet is for connecting gas source, and described pneumatic outlet communicates with the inner chamber of box-like body 8. In this scheme, by leading in sandwich structure into gas by gas inlet, it is inner that the cooled device 1 of gas heat part enters into box-like body 8 after absorbing, and reaches the object regulating temperature in box-like body 8. In this scheme, on cold fluid pipe, series connection is the power control section 2 of flowrate control valve, so that the power of control refrigeration plant 1.
Due in test specimen 7 practical work process, temperature approximately equal around test specimen 7, test specimen 7 for ease of obtaining in experimentation is in an isothermal environment, be beneficial to improve simulated experiment data can referential, also comprising the air circulation device 5 being arranged at box-like body 8 inside, described air circulation device 5 mixes for the even of box-like body 8 inner air.
Embodiment 3:
A kind of system simulating test specimen mechanical property under freeze thawing temperature loading, as shown in Figure 1 to Figure 3, this system comprises stress loading device 9, also comprises any one proofing box that any one embodiment above provides, and it is inner that the test specimen inboardend of described stress loading device 9 is positioned at box-like body 8.
In a kind of system simulating test specimen mechanical property under freeze thawing temperature loading more than arranged, the stress loading device 9 arranged for applying to need the stress of simulation on test specimen 7, above stress loading device 9 for loading tensile stress, stress, repeated stress etc. on test specimen 7, as adopted pneumatic cylinder, the piston rod end of hydro-cylinder act on test specimen 7, adopt by PZT (piezoelectric transducer), displacement amplifier series connection, the stress loading device 9 etc. that supersonic signal generator forms as PZT (piezoelectric transducer) electric energy input unit. Above system can in imitation specimen 7 frozen-thaw process test specimen 7 temperature variation process in test specimen 7 is applied stress, compared to existing apparatus, owing to closer to test specimen 7 real operating environments, native system test result is accurate, test efficiency height.
Embodiment 4:
Described system is further qualified by the present embodiment on the basis of embodiment 3, for ease of temperature detection and/or the Humidity Detection of box-like body 8 internal medium, also comprises the survey temperature portion 4 and/or moisture content measurement portion that are arranged at box-like body 8 inside. More than survey temperature portion 4 and moisture content measurement portion can adopt temperature sensor or humidity sensor respectively, with direct output digit signals or simulating signal, utilize above signal feedback, act on some functional component of native system, it is achieved the automatic operating of native system.
For promoting the fixing firm property of test specimen 7 and avoid the situations such as or eccentric force concentrated because of test specimen 7 upper stress, affect the accuracy of mechanical property experimental results under test specimen 7 freeze thawing temperature loading, the test specimen inboardend of described stress loading device 9 is also provided with ball-joint seat 6, described ball-joint seat 6 comprises ball seat 61, spheroid 62, compress bar 63 and check nut 64, described ball seat 61 is provided with spherical groove, described spheroid 62 is embedded in spherical groove, compressing bar 63 is fixed on spheroid 62, and compression bar 63 is provided with the thread segment for being threaded with the test specimen inboardend of stress loading device 9, the check nut 64 being also threaded on described thread segment and being fixedly connected with the test specimen inboardend of stress loading device 9 for realizing compression bar 63, described spheroid 62 is arranged in spherical groove, and spheroid 62 can rotate around self centre of sphere.
On above ball-joint seat 6, the distance between the test specimen inboardend of stress loading device 9 and test specimen 7 is changed by rotating compression bar 63, realize compressing being fixedly connected with of the test specimen inboardend of bar 63 with stress loading device 9 by above check nut 64, the form that spheroid 62 can rotate in spherical groove, it is convenient to change the angle of inclination of ball seat 61 relative to test specimen 7, to obtain the point of application of ball seat 61 with test specimen 7 the best, above point of application upper ball base 61 can adopt with test specimen 7 and directly contact, the other end of test specimen 7 and box-like body 8 interact test specimen 7 is applied static stress, examination is to carry out fatigue test, preferably disassemble described ball-joint seat 6, adopt the form that test specimen 7 is fixedly connected with stress loading device 9.
In the present embodiment, for avoiding deviating from non-artificial situation lower sphere 62 is by spherical groove, the opening width of above spherical groove is less than the diameter of spheroid 62, and ball seat 61 is two segments combined structure, spherical groove is spliced by two sections of ball seat 61, two sections of ball seat 61 with bolts, so that installing spheroid 62 on ball seat 61.
Further, preferably arrange two to become just to the ball-joint seat 6 of relation in box-like body 8 inside, one of them ball-joint seat 6 is connected with stress loading device 9, another ball-joint seat 6 is connected with box-like body 8, with the mechanical property test that test specimen 7 is fixed between two ball-joint seats 6 to carry out in freeze thawing temperature loading situation test specimen 7.
As technical scheme pressure loading device can lowered the temperature, it is beneficial to extend the work-ing life of native system, also comprises the refrigeration system carrying out for corresponding force loading device 9 cooling.
Embodiment 5:
The present embodiment provides a kind of and simulates the implementation that the system of test specimen mechanical property is concrete under freeze thawing temperature loading: as shown in Figure 4, for ease of realizing the automatic control of native system, also comprise general control system, described general control system is connected with freeze thawing refrigeration system signal, described refrigeration plant 1 is the part in freeze thawing refrigeration system, freeze thawing refrigeration system also comprises control module, above general control system is connected with described control module signal, described system also comprises the moisture control system for the detection of box-like body 8 humidity, described moisture control system is connected with general control system signal, also comprise the loading system for proof stress deceleration loading device 9 running status, described loading system is stress loading device 9, also comprise the heat radiation refrigeration system for deceleration loading device cooling, described heat radiation refrigeration system, freeze thawing refrigeration system can be independent system, can also be both it be same system.
In the present embodiment, the specific implementation of general control system, loading system, moisture control system, control module can adopt in prior art ripe PLC system, DCS system, other industrial computer etc., and the detection of the semaphores such as required temperature, humidity adopts corresponding sensor.
Above content is further description the present invention done in conjunction with concrete preferred implementation, can not assert that the specific embodiment of the present invention is confined to these explanations. For general technical staff of the technical field of the invention, other enforcement modes drawn under the technical scheme not departing from the present invention, all should be included in protection scope of the present invention.
Claims (10)
1. can simulate the proofing box of test specimen mechanical property under freeze thawing temperature loading for one kind, the refrigeration plant (1) comprising box-like body (8), being arranged at box-like body in (8), it is characterized in that, also comprise the atomized liquid entrance (10) being arranged on box-like body (8) case wall or the atomisation unit (13) being arranged in box-like body (8).
2. a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading according to claim 1, it is characterised in that, described box-like body (8) case wall is also provided with dry gas entrance (11) and convection of air hole (12).
3. a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading according to claim 1, it is characterised in that, the local of described box-like body (8) is also provided with the printing opacity plate (3) as box-like body (8) case wall.
4. a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading according to claim 1, it is characterized in that, the cold fluid pipe of described refrigeration plant (1) for being arranged on box-like body (8) case wall, described cold fluid pipe is used for passing through cold fluid, in cold fluid flow in the process of cold fluid pipe, absorb the heat in box-like body (8) cavity.
5. a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading according to claim 4, it is characterized in that, the case wall of described box-like body (8) is sandwich type structure, described refrigeration plant (1) is arranged in the interlayer of box-like body (8) case wall, also comprise the gas inlet and pneumatic outlet that are connected with described interlayer, described gas inlet is for connecting gas source, and described pneumatic outlet communicates with the inner chamber of box-like body (8).
6. a kind of proofing box simulating test specimen mechanical property under freeze thawing temperature loading according to claim 1, it is characterized in that, also comprising and be arranged at the inner air circulation device (5) of box-like body (8), described air circulation device (5) mixes for the even of box-like body (8) inner air.
7. can simulate the system of test specimen mechanical property under freeze thawing temperature loading for one kind, comprise stress loading device (9), it is characterized in that, also comprising such as proofing box as described in any one in claim 1-6, it is inner that the test specimen inboardend of described stress loading device (9) is positioned at box-like body (8).
8. a kind of system simulating test specimen mechanical property under freeze thawing temperature loading according to claim 7, it is characterised in that, also comprise and it is arranged at the inner survey temperature portion (4) of box-like body (8) and/or moisture content measurement portion.
9. a kind of system simulating test specimen mechanical property under freeze thawing temperature loading according to claim 7, it is characterized in that, the test specimen inboardend of described stress loading device (9) is also provided with ball-joint seat (6), described ball-joint seat (6) comprises ball seat (61), spheroid (62), compress bar (63) and check nut (64), described ball seat is provided with spherical groove on (61), described spheroid (62) is embedded in spherical groove, compressing bar (63) is fixed on spheroid (62), and compression bar (63) is provided with the thread segment for being threaded with the test specimen inboardend of stress loading device (9), the check nut (64) being also threaded on described thread segment and being fixedly connected with the test specimen inboardend of stress loading device (9) for realizing compression bar (63), described spheroid (62) is arranged in spherical groove, and spheroid (62) can rotate around self centre of sphere.
10. a kind of system simulating test specimen mechanical property under freeze thawing temperature loading according to claim 7, it is characterised in that, also comprise the refrigeration system carrying out cooling for corresponding force loading device (9).
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| CN201610167584.0A CN105628512A (en) | 2016-03-23 | 2016-03-23 | Test box and system capable of simulating mechanical property of test piece under freeze-thaw temperature load |
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| CN201610167584.0A CN105628512A (en) | 2016-03-23 | 2016-03-23 | Test box and system capable of simulating mechanical property of test piece under freeze-thaw temperature load |
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| CN110389101A (en) * | 2019-09-06 | 2019-10-29 | 浦江亿岩机械设备有限公司 | A kind of construction material frost resistance detection device |
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| CN111046469A (en) * | 2019-12-13 | 2020-04-21 | 江西理工大学南昌校区 | Thickness calculation method of single-pile foundation concrete protective layer in frozen soil area and protective layer |
| CN111062076A (en) * | 2019-12-13 | 2020-04-24 | 江西理工大学南昌校区 | Thickness calculation method for frozen soil area group pile foundation concrete protective layer and protective layer |
| CN113466286A (en) * | 2021-06-30 | 2021-10-01 | 中国科学院西北生态环境资源研究院 | Freeze-thaw test equipment for simulating concrete ultralow-temperature-large-temperature-difference freeze-thaw process |
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