CN204027929U - Concrete creep instrument - Google Patents
Concrete creep instrument Download PDFInfo
- Publication number
- CN204027929U CN204027929U CN201420452916.6U CN201420452916U CN204027929U CN 204027929 U CN204027929 U CN 204027929U CN 201420452916 U CN201420452916 U CN 201420452916U CN 204027929 U CN204027929 U CN 204027929U
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- Prior art keywords
- fine setting
- pressure
- leading screw
- hydraulic
- board
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Abstract
The utility model discloses a kind of concrete creep instrument, comprise triangular test frame, hydraulic means, microcomputer, pressure transducer, displacement transducer and pressure fine-adjustment device, triangular test frame comprises three location leading screws, top board, lower platen, installing plate, base, ball pivot and springs, location leading screw is from top to bottom connected with installing plate, top board, lower platen and base respectively successively, and on the location leading screw between lower platen and base, cover has spring; Hydraulic means comprises hydraulic station control system, Hydraulic Station and hydraulic cylinder, and hydraulic station control system is electrically connected to Hydraulic Station, and Hydraulic Station is connected liquid conducting with hydraulic cylinder by hydraulic tube; Pressure fine-adjustment device comprises servomotor, fine setting leading screw, bearing and fine setting increased pressure board.The utility model can make test specimen test under constant voltage, thereby guarantees that measured numerical value is comparatively accurate, and can accurately and timely measure the variation of test specimen load, and according to this variation, the output pressure of pressure mechanism is adjusted.
Description
Technical field
The utility model relates to testing concrete performance instrument, particularly a kind of concrete test instrument.
Background technology
Concrete creep is that the phenomenon that xoncrete structure distortion constantly increases in time appears in xoncrete structure under the effect that continues load.Creep and cause the loss of prestress of prestressed reinforced concrete construction or increase the amount of deflection of long-span beams or cause (surpassing) high building structure to produce excessive vertical differential deformation.And in the prior art, there are two kinds of phenomenons, a kind of is to guarantee that the pressure that test specimen is subject in process of the test is comparatively invariable, can not reflect the real force-bearing situation of xoncrete structure in building structure, can not approach the force-bearing situation that simulates xoncrete structure; Another kind is to make test specimen in process of the test, be subject to comparatively constant pressure, can comparatively approach the real force-bearing situation of xoncrete structure, but due to lower platen discontinuity, can cause test specimen discontinuity and then have influence on test result, making test result occur larger error.
Utility model content
In view of this, the utility model is to provide a kind of concrete creep instrument that can adjust pressure size when xoncrete structure is crept, make its measured concrete long-term behaviour and permanance more accurate, can also prevent hydraulic means from breaking down simultaneously test need to be reformed or test figure and actual conditions differ larger situation appearance.
For addressing the above problem, the utility model adopts following technical scheme: concrete creep instrument, comprise triangular test frame, hydraulic means, microcomputer, pressure transducer, displacement transducer and pressure fine-adjustment device, described triangular test frame comprises three location leading screws, top board, lower platen, installing plate, base, ball pivot and springs, described location leading screw is from top to bottom connected with described installing plate, described top board, described lower platen and described base respectively successively, and on the described location leading screw between described lower platen and described base, cover has described spring, described hydraulic means comprises hydraulic station control system, Hydraulic Station and hydraulic cylinder, and described hydraulic station control system is electrically connected to described Hydraulic Station, and described Hydraulic Station is connected liquid conducting with described hydraulic cylinder by hydraulic tube, described pressure fine-adjustment device comprises servomotor, fine setting leading screw, bearing and fine setting increased pressure board, described fine setting increased pressure board is threaded with the first end of described fine setting leading screw by being located at the supercentral screw of described fine setting increased pressure board, the second end of described fine setting leading screw is arranged on described base by described bearing, the termination of the second end of described fine setting leading screw is positioned at described base below, the clutch end of described fine setting leading screw by crowngear and described servomotor be in transmission connection, the lower face of described installing plate is fixedly connected with the cylinder barrel of described hydraulic cylinder, the piston rod free end of described hydraulic cylinder is fixedly connected with the upper face of described top board, described location leading screw between the upper face of described top board and the lower face of described installing plate is provided with location lock nut, the lower face of described top board is provided with upper pressure-bearing platform by described ball pivot, the upper face of described lower platen is provided with lower pressure-bearing platform by described ball pivot, on described location leading screw between described lower platen and described base, cover has described spring, between described spring and described base, be provided with described fine setting increased pressure board, described fine setting increased pressure board is joined the sliding accessory of hole and described location leading screw and is connect by running through the cunning of described fine setting increased pressure board upper face and lower face, described fine setting increased pressure board and described lower platen coaxially assemble, described upper pressure-bearing platform is equipped with a described pressure transducer, described microcomputer is connected with described hydraulic station control system, described pressure transducer, described displacement transducer and described servo telecommunication respectively, described displacement transducer is embedded in test specimen.
Above-mentioned concrete creep instrument, described bearing is located at the place, axle center of described base.
Above-mentioned concrete creep instrument, described screw is located at the place, axle center of described fine setting increased pressure board.
Above-mentioned concrete creep instrument, also comprises Temperature Humidity Sensor, and described Temperature Humidity Sensor is connected with described microcomputer communication.
Above-mentioned concrete creep instrument, described Temperature Humidity Sensor is that temperature measurement accuracy is the Temperature Humidity Sensor that ± 0.5 ℃ and moisture measurement precision are ± 1%.
Above-mentioned concrete creep instrument, it is 12 hours above emergency power pacies of described microcomputer power supply that described microcomputer is furnished with sustainable.
The beneficial effects of the utility model are:
1. the utility model can make test specimen test under comparatively constant pressure, thereby guarantees that measured numerical value is comparatively accurate;
2. by pressure adjustmenting mechanism, realize the control accurate that is carried in load pressure on test specimen, thereby make the utility model adjust accurately in time the position of lower platen according to pressure transducer institute measuring pressure value, make test specimen can under constant voltage, carry out performance test;
3. when the location lock nut in the utility model can avoid hydraulic means to break down, test specimen pressure disappears or reduces, and causes test failure or test the data obtained inaccurate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model concrete creep instrument;
Fig. 2 is the pressure fine-adjustment device structural representation of the utility model concrete creep instrument.
In figure: 1-triangular test frame, 2-hydraulic means, 3-microcomputer, 4-Hydraulic Station, 5-hydraulic cylinder, 6-pressure fine-adjustment device, 7-locates leading screw, 8-installing plate, 9-top board, 10-lower platen, 11-base, 12-ball pivot, the upper pressure-bearing platform of 13-, pressure-bearing platform under 14-, 15-locates lock nut, 16-Temperature Humidity Sensor, 17-hydraulic pipe, 18-test specimen, 19-servomotor, 21-finely tunes increased pressure board, and 22-finely tunes leading screw, 23-crowngear, 24-bearing, 25-pressure transducer, 26-spring.
Embodiment
For clearly demonstrating the scheme in the utility model, provide preferred embodiment below and be described with reference to the accompanying drawings.
As shown in Figure 1, the utility model concrete creep instrument, comprises triangular test frame 1, hydraulic means 2, microcomputer 3, pressure transducer 25, displacement transducer and pressure fine-adjustment device 6.
Wherein, as shown in Figure 1, described triangular test frame 1 comprises three location leading screws 7, top board 9, lower platen 10, installing plate 8, base 11, ball pivot 12 and spring 26, described location leading screw 7 is from top to bottom connected with described installing plate 8, described top board 9, described lower platen 10 and described base 11 respectively successively, and on the described location leading screw 7 between described lower platen 10 and described base 11, cover has described spring 26.
As shown in Figure 1, described hydraulic means 2 comprises hydraulic station control system, Hydraulic Station 4 and hydraulic cylinder 5, and described hydraulic station control system is electrically connected to described Hydraulic Station 4, and described Hydraulic Station 4 is connected liquid conducting with described hydraulic cylinder 5 by hydraulic tube 17.
As depicted in figs. 1 and 2, described pressure fine-adjustment device 6 comprises servomotor 19, fine setting leading screw 22, bearing 24 and fine setting increased pressure board 21, described fine setting increased pressure board 21 is threaded with the first end of described fine setting leading screw 22 by being located at the supercentral screw of described fine setting increased pressure board 21, the second end of described fine setting leading screw 22 is arranged on described base 11 by described bearing 24, the termination of the second end of described fine setting leading screw 22 is positioned at described base 11 belows, described fine setting leading screw 22 by crowngear 23 and the clutch end of described servomotor 19, be in transmission connection.In order to make described fine setting increased pressure board 21 and described lower platen 10 stressed evenly, and then guarantee that test specimen 18 pressure direction in whole test process remains unchanged, described bearing 24 is located at the place, axle center of described base 11, and described screw is located at the place, axle center of described fine setting increased pressure board 21.
As shown in Figure 1, the lower face of described installing plate 8 is fixedly connected with the cylinder barrel of described hydraulic cylinder 5, the piston rod free end of described hydraulic cylinder 5 is fixedly connected with the upper face of described top board 9, described location leading screw 7 between the lower face of the upper face of described top board 9 and described installing plate 8 is provided with location lock nut 15, the lower face of described top board 9 is provided with upper pressure-bearing platform 13 by described ball pivot 12, the upper face of described lower platen 10 is provided with lower pressure-bearing platform 14 by described ball pivot 12, on described location leading screw 7 between described lower platen 10 and described base 11, cover has described spring 26, between described spring 26 and described base 11, be provided with described fine setting increased pressure board 21, described fine setting increased pressure board 21 is joined the sliding accessory of hole and described location leading screw 7 and is connect by running through the cunning of described fine setting increased pressure board 21 upper faces and lower face, described fine setting increased pressure board 21 coaxially assembles with described lower platen 10, described upper pressure-bearing platform 13 is equipped with a described pressure transducer 25, described microcomputer 3 communicates to connect with described hydraulic station control system, described pressure transducer 25, described displacement transducer and described servomotor 19 respectively, described displacement transducer is embedded in described test specimen 18.
In addition near the humiture comparatively humiture of accurate recording Creep Apparatus experimental enviroment, especially test unit, in the utility model, be also equipped with Temperature Humidity Sensor 16, and described Temperature Humidity Sensor 16 and described microcomputer 3 communication connections.In order to make the humiture of experimental enviroment meet testing standard, the temperature measurement accuracy of the described Temperature Humidity Sensor 16 in the utility model is ± 0.5 ℃, and moisture measurement precision is ± 1%.The simultaneously impact on test for fear of the power-off condition occurring in process of the test, the described microcomputer 3 in the utility model is also furnished with emergency power pack, and the sustainable time for described microcomputer 3 power supplies of described emergency power pack is more than or equal to 12 hours.
In the present embodiment, according to the method for recording in the conventional knowledge of this area and metric system for described test specimen 18, and according to the ordinary skill in the art by displacement transducer pre-plugged in described test specimen 18.After described test specimen 18 prepares, then according to the test standard of recording in the conventional knowledge of this area, test.First by described servomotor 19, described fine setting increased pressure board 21 is dropped to the distance making between described lower platen 10 and described top board 9 and meet testing requirements, then the described test specimen 18 preparing is placed on described lower pressure-bearing platform 14, then described hydraulic cylinder 5 presses down, described top board 9 drives described upper pressure-bearing platform 13 to move down, thereby realize described test specimen 18 is applied to predetermined pressure, when the pressure size that described pressure transducer 25 records equals preset pressure value, under stopping, pushing away described top board 9, and keep the size of the output pressure of described hydraulic cylinder 5, then described location lock nut 15 is tightened, the unsuitable overtorquing of described location lock nut 15, avoiding tightening in the process of described location lock nut 15 makes the pressure that is carried in described test specimen 18 surpass preset pressure, and then avoid test to exert an influence, make error of test data larger, depart from reality.And in process of the test, along with described test specimen 18 is crept, the pressure being originally carried on described test specimen 18 can diminish gradually, and the test period is likely on 1 year, the elasticity coefficient of spring 26 also can change, this pressure that just can not guarantee to be applied in process of the test on described test specimen 18 keeps invariable, if adjusted not in time, testing measured performance data will not conform to the actual conditions, if but the pressure being carried on described test specimen 18 is all needed to open described Hydraulic Station at every turn, so not only can increase energy consumption, and can increase operation easier.The utility model adopts the position of 6 pairs of described lower platens 10 of described pressure fine-adjustment device to finely tune, thereby realize the pressure being carried on described test specimen 18, keeps constant.The principle of work of described pressure fine-adjustment device 6 is, when the pressure on being carried in described test specimen 18 changes, described pressure transducer 25 sends to described microcomputer 3 by the real-time size of above-mentioned pressure, 3 pairs of above-mentioned pressure of described microcomputer in real time size compare with preset pressure size, then to described servomotor 19, send startup command, described servomotor 19 work, drive described fine setting leading screw 22 to rotate, described fine setting increased pressure board 21 is moved under the drive of described fine setting leading screw 22, and then described fine setting increased pressure board 21 promotes to move or move down on described spring 26, described spring 26 promotes to move or move down on described lower platen 10 under the effect that is subject to pushing force, until the measured pressure size of described pressure transducer 25 equals to test preset pressure.Because described servomotor 19 starts soon, reaction is fast, and can carry out microspur adjustment, so can meet described test specimen 18 by described pressure fine-adjustment device 6, can under constant pressure, carry out the requirement of creep test, and then guaranteed the accuracy of test figure, for building operation provides reliable scientific basis.
Above-described embodiment is only for the utility model creation example is clearly described, and not the utility model is created the restriction of embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all embodiments.All any apparent variations of being extended out within spirit of the present utility model and principle or change are still among the utility model is created the protection domain of claim.
Claims (6)
1. concrete creep instrument, it is characterized in that, comprise triangular test frame (1), hydraulic means (2), microcomputer (3), pressure transducer (25), displacement transducer and pressure fine-adjustment device (6), described triangular test frame (1) comprises three location leading screws (7), top board (9), lower platen (10), installing plate (8), base (11), ball pivot (12) and spring (26), described location leading screw (7) from top to bottom successively respectively with described installing plate (8), described top board (9), described lower platen (10) is connected with described base (11), the upper cover of described location leading screw (7) between described lower platen (10) and described base (11) has described spring (26), described hydraulic means (2) comprises hydraulic station control system, Hydraulic Station (4) and hydraulic cylinder (5), described hydraulic station control system is electrically connected to described Hydraulic Station (4), and described Hydraulic Station (4) is connected liquid conducting with described hydraulic cylinder (5) by hydraulic tube (17), described pressure fine-adjustment device (6) comprises servomotor (19), fine setting leading screw (22), bearing (24) and fine setting increased pressure board (21), described fine setting increased pressure board (21) is threaded with the first end of described fine setting leading screw (22) by being located at the supercentral screw of described fine setting increased pressure board (21), the second end of described fine setting leading screw (22) is arranged on described base (11) by described bearing (24), the termination of the second end of described fine setting leading screw (22) is positioned at described base (11) below, the clutch end of described fine setting leading screw (22) by crowngear (23) and described servomotor (19) be in transmission connection, the lower face of described installing plate (8) is fixedly connected with the cylinder barrel of described hydraulic cylinder (5), the piston rod free end of described hydraulic cylinder (5) is fixedly connected with the upper face of described top board (9), described location leading screw (7) between the lower face of the upper face of described top board (9) and described installing plate (8) is provided with location lock nut (15), the lower face of described top board (9) is provided with upper pressure-bearing platform (13) by described ball pivot (12), the upper face of described lower platen (10) is provided with lower pressure-bearing platform (14) by described ball pivot (12), the upper cover of described location leading screw (7) between described lower platen (10) and described base (11) has described spring (26), between described spring (26) and described base (11), be provided with described fine setting increased pressure board (21), described fine setting increased pressure board (21) is joined the sliding accessory of hole and described location leading screw (7) and is connect by running through the cunning of described fine setting increased pressure board (21) upper face and lower face, described fine setting increased pressure board (21) coaxially assembles with described lower platen (10), described upper pressure-bearing platform (13) is equipped with a described pressure transducer (25), described microcomputer (3) communicates to connect with described hydraulic station control system, described pressure transducer (25), described displacement transducer and described servomotor (19) respectively, described displacement transducer is embedded in test specimen (18).
2. concrete creep instrument according to claim 1, is characterized in that, described bearing (24) is located at the place, axle center of described base (11).
3. concrete creep instrument according to claim 1, is characterized in that, described screw is located at the place, axle center of described fine setting increased pressure board (21).
4. concrete creep instrument according to claim 1, is characterized in that, also comprises Temperature Humidity Sensor (16), described Temperature Humidity Sensor (16) and described microcomputer (3) communication connection.
5. concrete creep instrument according to claim 4, is characterized in that, described Temperature Humidity Sensor (16) for temperature measurement accuracy be the Temperature Humidity Sensor that ± 0.5 ℃ and moisture measurement precision are ± 1%.
6. concrete creep instrument according to claim 1, is characterized in that, it is 12 hours above emergency power pacies of described microcomputer (3) power supply that described microcomputer (3) is furnished with sustainable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420452916.6U CN204027929U (en) | 2014-08-12 | 2014-08-12 | Concrete creep instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420452916.6U CN204027929U (en) | 2014-08-12 | 2014-08-12 | Concrete creep instrument |
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| Publication Number | Publication Date |
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| CN204027929U true CN204027929U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420452916.6U Expired - Fee Related CN204027929U (en) | 2014-08-12 | 2014-08-12 | Concrete creep instrument |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634663A (en) * | 2015-03-06 | 2015-05-20 | 扬州大学 | Adjustable device for testing self-balancing long-term stressed wood columns |
| CN104697867A (en) * | 2015-03-11 | 2015-06-10 | 重庆工商职业学院 | Concrete creeping tester |
| CN105241655A (en) * | 2015-10-29 | 2016-01-13 | 攀枝花学院 | Pressure stabilizing apparatus for structure test |
| CN105890995A (en) * | 2016-02-25 | 2016-08-24 | 大连理工大学 | High-strength concrete pressure-bearing creep test system |
| CN107589016A (en) * | 2017-08-09 | 2018-01-16 | 平安煤炭开采工程技术研究院有限责任公司 | A kind of pressure pilot system |
| CN107621253A (en) * | 2017-10-27 | 2018-01-23 | 天津建仪机械设备检测有限公司 | Concrete deformation detecting device |
| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
| CN107870126A (en) * | 2017-10-11 | 2018-04-03 | 太原理工大学 | New concrete compression column and armored concrete are by camber beam creep test device |
| CN108507865A (en) * | 2018-04-16 | 2018-09-07 | 天津市港源试验仪器厂 | A kind of full-automatic concrete creep test instrument |
| CN109115611A (en) * | 2018-10-23 | 2019-01-01 | 西南交通大学 | A kind of large-tonnage compression creep test device suitable for high-strength concrete |
| CN109374369A (en) * | 2018-08-30 | 2019-02-22 | 中国地质大学（武汉） | A kind of device and method for realizing the rock joint charges difference degree of consolidation |
| CN109507016A (en) * | 2018-12-26 | 2019-03-22 | 西安建筑科技大学 | A kind of multifactor Under Concrete durability test dynamic loading device and method |
| CN113865972A (en) * | 2021-10-13 | 2021-12-31 | 西安石油大学 | Outdoor combined rock mechanical property analysis device |
-
2014
- 2014-08-12 CN CN201420452916.6U patent/CN204027929U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634663A (en) * | 2015-03-06 | 2015-05-20 | 扬州大学 | Adjustable device for testing self-balancing long-term stressed wood columns |
| CN104697867A (en) * | 2015-03-11 | 2015-06-10 | 重庆工商职业学院 | Concrete creeping tester |
| CN105241655B (en) * | 2015-10-29 | 2018-02-06 | 攀枝花学院 | Stable-pressure device for structural test |
| CN105241655A (en) * | 2015-10-29 | 2016-01-13 | 攀枝花学院 | Pressure stabilizing apparatus for structure test |
| CN105890995A (en) * | 2016-02-25 | 2016-08-24 | 大连理工大学 | High-strength concrete pressure-bearing creep test system |
| CN107589016A (en) * | 2017-08-09 | 2018-01-16 | 平安煤炭开采工程技术研究院有限责任公司 | A kind of pressure pilot system |
| CN107870126A (en) * | 2017-10-11 | 2018-04-03 | 太原理工大学 | New concrete compression column and armored concrete are by camber beam creep test device |
| CN107870126B (en) * | 2017-10-11 | 2019-11-12 | 太原理工大学 | New concrete compression column and armored concrete are by camber beam creep test device |
| CN107621253A (en) * | 2017-10-27 | 2018-01-23 | 天津建仪机械设备检测有限公司 | Concrete deformation detecting device |
| CN107843555A (en) * | 2017-12-20 | 2018-03-27 | 清华大学 | The detection method and device of the true adhesion strength of Arch Dam With Joint |
| CN107843555B (en) * | 2017-12-20 | 2023-11-07 | 清华大学 | Method and device for detecting true bonding strength of transverse seam of arch dam |
| CN108507865A (en) * | 2018-04-16 | 2018-09-07 | 天津市港源试验仪器厂 | A kind of full-automatic concrete creep test instrument |
| CN109374369A (en) * | 2018-08-30 | 2019-02-22 | 中国地质大学（武汉） | A kind of device and method for realizing the rock joint charges difference degree of consolidation |
| CN109115611A (en) * | 2018-10-23 | 2019-01-01 | 西南交通大学 | A kind of large-tonnage compression creep test device suitable for high-strength concrete |
| CN109507016A (en) * | 2018-12-26 | 2019-03-22 | 西安建筑科技大学 | A kind of multifactor Under Concrete durability test dynamic loading device and method |
| CN113865972A (en) * | 2021-10-13 | 2021-12-31 | 西安石油大学 | Outdoor combined rock mechanical property analysis device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141217 Termination date: 20150812 |
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| EXPY | Termination of patent right or utility model |