CN201387426Y - Concrete early-age contractility measuring instrument displacement probe fixing device - Google Patents
Concrete early-age contractility measuring instrument displacement probe fixing device Download PDFInfo
- Publication number
- CN201387426Y CN201387426Y CN200820168240U CN200820168240U CN201387426Y CN 201387426 Y CN201387426 Y CN 201387426Y CN 200820168240 U CN200820168240 U CN 200820168240U CN 200820168240 U CN200820168240 U CN 200820168240U CN 201387426 Y CN201387426 Y CN 201387426Y
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- portal trestle
- probe
- mount pad
- concrete
- displacement
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model provides a concrete early-age contractility measuring instrument displacement probe fixing device, which is provided with a portal trestle which strides over a test model [18], wherein the portal trestle is provided with a probe mounting seat [13], the portal trestle [9] is of a channel-type part with a portal cross section and comprises a platform and two side walls which extend downwards, the width between the inner sides of the two side walls of the portal trestle is more than that between the outer sides of the two side walls of the test model, the height of the two side walls of the portal trestle is smaller than that of the test model, the two side walls of the portal trestle are provided with a screw hole, the screw hole is provided with a bracket fixed bolt [8] with the head part facing inwards, and the probe mounting seat is installed on the bracket platform. Compared with the prior art, the displacement probe can be conveniently and correctly fixed on the test model, so that the heavy test model is free from being moved to the test platform and the relative position between the probe and a target can be determined without complex movement and adjustment. Through the bolts at two sides of the bracket, the relative position between the probe and the target is fixed.
Description
Technical field
The utility model relates to a kind of concrete shrinkage analyzer displacement probe stationary installation in length of time morning, concrete early the length of time shrinkage analyzer be measure a kind of unconfined condition under concrete early the length of time shrinkage test unit, in the genus physics with the technical field of non-contacting sensor measuring distance.Described displacement is the deformation displacement of the relative concrete component in measured point but not the displacement on the relative ground of measured object.
Background technology
To shrink distortion along with the process of solidifying and wear out behind the concrete casting.Particularly early the length of time, shrinkage was to estimate the important technology index of concrete splitting resistance to the concrete shrinkage performance in 3 days, and this performance detection prevents that to concrete works concrete component from producing the crack and having practical significance.Since in 3 days early-age concrete do not solidify fully as yet and its drawdown deformation amount very small, shrink displacement if adopt the Mechanical Contact mode directly to measure it, the effect of the power that Mechanical Contact produces during measurement may make measured body be subjected to displacement and influence measurement result.In order accurately to measure concrete shrinkage in length of time morning, " research of concrete contraction in length of time morning test electric vortex method " (" building materials journal " 2006 96 phases of volume) have proposed to measure under a kind of unconfined condition the method for concrete shrinkage in length of time morning, the i.e. contactless concrete of current vortex shrinkage method of testing in length of time morning.Produced on this basis concrete early the length of time shrinkage electric vortex method analyzer, the displacement transducer of this analyzer is made of probe and drive unit thereof and target.
During this concrete shrinkage electric vortex method analyzer in length of time morning use, brushing lubricating oil in the concrete die trial of 10cm * 10cm * 51.5cm, and then in die trial, lay two layers of plastic thin films, evenly smear one deck lubricating oil on every layer film, to guarantee the Free Transform of concrete in die trial, two metal targets are embedded in two ends vibrating forming on jarring machine of concrete sample.Move testing table in company with die trial behind the specimen molding, and with concrete early the length of time, shrinkage analyzer displacement probe was in place with stationary installation, so-called probe fixing device has two portal trestles that stride across the die trial top to be placed on the testing table, extends a hanging pillar on the beam of this portal trestle downwards and is the probe mount pad.Each fixes the probe of a current vortex non-contact displacement transducer on two probe mount pads, and probe must just can be formed satisfactory micro-displacement sensor through regulating the reflection target area of aiming at holding target to expose concrete sample.This concrete device when early the length of time, shrinkage electric vortex method analyzer used constitutes as shown in Figure 1: test specimen 5 moulding and placing on the test platform 7 in die trial 6, respectively there is a target 4 at the die trial two ends, portal trestle 1 is arranged across the die trial top, the hanging pillar formula probe mount pad 2 of downward extension is arranged on the portal trestle beam, probe 3 is installed on the mount pad aims at target.
The structure of above-mentioned probe fixing device exists die trial and places inconvenience and may cause the inaccurate defective in position between probe and target in application:
Because portal trestle is settled on the baseplane with its both sides upright supports, then will be affected as smooth inadequately then its arrangement state in its baseplane of settling, this portal trestle volume carries inconvenience more greatly simultaneously, so behind specimen molding, die trial to be put the below of the displacement probe portal trestle of said probe fixing device, and make displacement probe aim at the measurement face of tested reflecting target (target).Owing to limit by the structure of portal trestle, following two kinds of placement situations roughly arranged:
The one, probe bracket has been fixed on the test platform, and the collision that die trial need be avoided hanging pillar and target earlier vertically is moved into suitable position, laterally moves to make displacement probe aim at tested reflecting target again.This method is because the concrete sample weight after the moulding is very big, moves that to put operation extremely inconvenient, and displacement probe is difficult to aim at tested reflecting target, and causes easily and brush up against tested reflecting target and cause reflecting target to be subjected to displacement and influence measurement.
The 2nd, put die trial earlier well, again probe bracket is placed on suitable position, die trial top, again probe bracket is fixed on the testing table.This method operation is more relatively easy than preceding a kind of method, but because the probe bracket position also must be fixed on the test platform after putting, mounting structure is not easy, the running time is longer.
As seen, probe fixing device of the prior art makes the relative position between probe and the target determine difficulty, thereby has influence on the accuracy of measurement result.
Summary of the invention
At above-mentioned defective, the utility model be exactly to provide a kind of solved concrete that die trial places inconvenient problem early the length of time shrinkage analyzer displacement probe stationary installation.
The concrete shrinkage analyzer displacement probe stationary installation in length of time morning that the utility model provides, the portal trestle that the die trial of striding across top is arranged, portal trestle is the support of its cross section for the shape of the few following horizontal stroke of mouthful word, one probe mount pad is arranged on the portal trestle, said portal trestle is the grooved member with shape xsect, comprise platform and the two side of extending downwards, width between the inboard, portal trestle two side is greater than the width between the outside, die trial two side, the height of portal trestle two side is less than the height of die trial, screw is respectively arranged on the portal trestle two side, the inside screw of head is arranged on the screw, and said probe mount pad is on rack platform.
The concrete that the utility model provides early shrinkage analyzer displacement probe stationary installation in length of time operating process in use is: behind the test specimen by method acquisition same as the prior art, with portal trestle in the utility model across being placed on the suitable position of die trial, tighten the clamp-screw of the support both sides that wrap in outside the die trial both sides and realize fixing between portal trestle and the concrete die trial, said portal trestle is meant that at the correct position in the die trial displacement probe of installing on the probe mount pad on it aimed at tested reflecting target and kept suitable measuring distance.
Concrete that the utility model provides early the length of time shrinkage analyzer displacement probe stationary installation, the trench structure by portal trestle can be carried into the scene easily and be placed in the die trial; Support can be carried out firm being connected with die trial by the bolt structure on the support two side.Compared with prior art, the utility model can be fixed in the die trial displacement probe easily and accurately, and need not the die trial of heaviness is moved testing table and moved and adjust the relative position of determining between probe and the target by complicated.And the screw by the support both sides makes the relative position between probe and the target obtain fixing, overcome door morpheme in the prior art move probe fixing device by be fixed on keep on the test platform and die trial between relative position, and the relative position between probe and the target is fixed, more because the measured displacement value is micron-sized, as easy as rolling off a logly is subjected to the influence of environmental vibration and causes the defective of measuring error.Be that the utility model provides a kind of probe measurement easy for installation concrete shrinkage analyzer displacement probe stationary installation in length of time morning accurately that makes.
On the lower plane of said rack platform and the die trial two side position contacting projection is arranged, its effect is to make the platform lower plane exceed plane in the concrete die trial and a suitable distance is arranged, platform can not come in contact finally with the concrete sample in the die trial cause condensing, and might influence testing result.
Both sides are furnished with marks such as breach or scale before and after the said rack platform, and these marks align with edge in the both sides, concrete die trial top, are used as the position reference of holder orientation and position during in order to installation.
On the said support two side there be more than 2 screw, in the hope of obtain between portal trestle and the die trial more firm, be connected more accurately.
The concrete shrinkage analyzer displacement probe stationary installation in length of time morning that the utility model provides, said displacement probe mount pad is to be installed on the portal trestle platform with the guide rail mechanism parallel with the two side, and between mount pad and the support regulating device that mount pad is moved along guide rail is arranged.
The measurement range of the probe of the current vortex non-contact displacement transducer that concrete early-age shrinkage fabricmeter is selected is very little, is 1mm～2mm.Therefore must place initial position suitable in the range to the probe of displacement transducer before on-test, to guarantee entire test all within the useful range of sensor, the deviation range of this initial position is preferably in the 0.2mm.And displacement probe is fixed tightly on the probe bracket by the screw-nut structure in the prior art, regulates distance between displacement probe and the tested reflecting target and reaches also unusual difficulty of suitable position by the nut that tightens up of both sides.The utility model then can be regulated distance between probe and the target easily by the adjustment structure that constitutes with guide rail and regulating device between portal trestle and the probe mount pad, thereby the distance of displacement probe and tested reflecting target is adjusted to the initial position of the interior the best of range.
The regulating device that seat is moved along guide rail, it is the thread mechanism that acts between probe mount pad and the portal trestle, as with the screw on the mount pad, the screw rod that cooperates with screw, limit between screw rod and support axially the screw rod erecting frame of position and be fixed on the thread mechanism that the knob (handwheel) on the screw rod constitutes; And for example to be fixed on screw rod on the mount pad, and screw rod nut engaged and limit between nut and support the thread mechanism that the axial erecting frame of position constitutes.The current vortex displacement probe is installed on the probe mount pad by screw rod on it or flange.
Said regulating device also comprises a spring, and the elastic force of this spring acts between probe mount pad and the portal trestle and is parallel to guide rail, makes the effect of playing steady adjusting when adjusting knob is operated.This spring can be that the extension spring form also can be the stage clip form.
The concrete shrinkage analyzer displacement probe stationary installation in length of time morning that the utility model provides, also has a locking device between probe mount pad and the portal trestle, this locking device is realized with a clamp-screw usually, be used for lock adjustment after good the probe mount pad and the position between the portal trestle fix with respect to the position between the support so that pop one's head at work.
Description of drawings
Fig. 1 is displacement probe fixing device and the formation picture of device when using in the prior art, among the figure: 1-portal trestle, 2-hanging pillar formula probe mount pad, 3-probe, 4-target, 5-test specimen, 6-die trial, 7-test platform;
Fig. 2 is the structural drawing of the utility model one embodiment and formation picture of device when using, among the figure: 8-support gib screw, 9-portal trestle, 10-bracket leg pad, 11-displacement probe adjusting knob, the 12-adjusting screw(rod), 13-displacement probe mount pad, 14-guide rail, the 15-displacement probe is installed screw, 16-mount pad lock(ing) bolt, 17-concrete sample, 18-die trial;
Fig. 3 is the vertical view of Fig. 2, among the figure: 8-support gib screw, the 9-portal trestle, 11-displacement probe adjusting knob, 12-adjusting screw(rod), 13-displacement probe mount pad, the 14-guide rail, 16-mount pad lock(ing) bolt, 19-adjusting screw(rod) erecting frame, breach mark on the 20-portal trestle platform, the 21-spring;
Fig. 4 is the right view of Fig. 2, among the figure: 8-support gib screw, 9-portal trestle, 11-displacement probe adjusting knob, 12-adjusting screw(rod), 13-displacement probe mount pad, 14-guide rail, 16-mount pad lock(ing) bolt, 19-adjusting screw(rod) erecting frame, 21-spring.
Embodiment
Shown in Fig. 2,3,4, the concrete of present embodiment early the length of time shrinkage analyzer displacement probe stationary installation have one by steel material through welding or wash and cut the portal trestle of being processed into 9, make it have enough thickness to guarantee its rigidity and deformation resistance.On the wall that extend the portal trestle both sides two screws are respectively arranged downwards, 4 support gib screws 8 (the screw afterbody is a knob) are screwed on these 4 screws, can make support be fixed on unlikely moving in the concrete die trial by tightening screw, unclamp screw and then can shirk support from the concrete die trial.There is a T type guide rail 14 parallel with the two side on the plane on the portal trestle platform, has displacement probe mount pad 13 to be assemblied on the support with T type groove.There is displacement probe that screw 15 is installed on the leading flank of probe mount pad, probe is assembled on it with screw rod.It is to constitute with the polished rod of leading portion and the threaded rod of back segment that adjusting screw(rod) 12 is arranged, and adjusting screw(rod) is parallel with guide rail.The adjusting screw(rod) leading portion is fixed on the probe mount pad from the rear.Have a displacement probe adjusting knob 11 with screw-internal thread fit on the back segment of adjusting screw(rod), these knob two ends respectively have an adjusting screw(rod) erecting frame 19 to be installed to adjusting screw(rod) on the portal trestle and adjusting knob can not moved forward and backward.Have a spring 21 to be enclosed between the probe mount pad and adjusting screw(rod) erecting frame of adjusting screw(rod) leading portion, make the probe mount pad obtain all the time one forward thrust and keep that it is conditioned steadily and accurately.Probe has a lock(ing) bolt 16 perpendicular to the portal trestle platform on the mount pad, when mount pad regulate put in place after with the position tightening of mount pad and portal trestle.Respectively there is downward bracket leg pad 10 portal trestle platform lower plane both sides, and support is rested on the two side of die trial with this pad.Respectively having a width to equal the breach of die trial width on the front and back end of portal trestle, promptly is the breach mark 20 on the portal trestle platform, the telltale mark when being installed in the die trial.
After 17 moulding of the concrete sample in the die trial 18, with concrete early the length of time shrinkage analyzer probe with above-mentioned probe fixing device by being installed in the die trial as shown in Figure 2.During installation, the portal trestle notch of stationary installation downwards, probe mount pad the place ahead points on the test specimen target and stride across die trial and be buckled in the die trial, and this moment, support rested on the die trial two side with filling up its platform under.Make portal trestle platform two ends breach touch both sides again and align, and tighten the support gib screw after making distance between probe and target drop in the adjustable extent with examination.After this then regulate the adjusting knob on the displacement adjusting screw(rod), make distance between probe and the target reach measurement requirement and the position by lock screw locking displacement probe.Begin the experiment with measuring of concrete shrinkage in length of time morning after installing.
This example has not been included whole schemes that the utility model can be implemented, according to prior art and content disclosed in the utility model, can obtain various embodiment, especially for the governor motion and the tightening mechanism of guide rail structure, probe mount pad, can adopt numerous technical scheme of existing machinery technical field with same function.
Claims (8)
1, a kind of concrete shrinkage analyzer displacement probe stationary installation in length of time morning, the portal trestle that the die trial of striding across top is arranged, portal trestle is the support of its cross section for the shape of the few following horizontal stroke of mouthful word, one probe mount pad is arranged on the portal trestle, it is characterized in that said portal trestle is the grooved member with shape xsect, comprise platform and the two side of extending downwards, width between the inboard, portal trestle two side is greater than the width between the outside, die trial two side, the height of portal trestle two side is less than the height of die trial, screw is respectively arranged on the portal trestle two side, the inside screw of head is arranged on the screw, and said probe mount pad is on rack platform.
2, concrete as claimed in claim 1 early the length of time shrinkage analyzer displacement probe stationary installation, it is characterized in that on the lower plane of said rack platform and the die trial two side position contacting projection being arranged.
3, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 1 is characterized in that both sides, said rack platform front and back are furnished with the mark that aligns with edge in the both sides, concrete die trial top.
4, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 1 is characterized in that on the said support two side there being more than 2 screw.
5, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 1, it is characterized in that said displacement probe mount pad is to be installed on the portal trestle platform with the guide rail mechanism parallel with the two side, and between displacement probe mount pad and the support regulating device that mount pad is moved along guide rail is arranged.
6, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 5, it is characterized in that making between said probe mount pad and the portal trestle seat along the regulating device that guide rail moves, is the thread mechanism that acts between probe mount pad and the portal trestle.
7, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 5 is characterized in that said regulating device also comprises a spring, and the elastic force of this spring acts between probe mount pad and the portal trestle and is parallel to guide rail.
8, concrete shrinkage analyzer displacement probe stationary installation in length of time morning as claimed in claim 5, it is characterized in that popping one's head in also has a locking device between mount pad and the portal trestle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820168240U CN201387426Y (en) | 2008-11-18 | 2008-11-18 | Concrete early-age contractility measuring instrument displacement probe fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820168240U CN201387426Y (en) | 2008-11-18 | 2008-11-18 | Concrete early-age contractility measuring instrument displacement probe fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201387426Y true CN201387426Y (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820168240U Expired - Lifetime CN201387426Y (en) | 2008-11-18 | 2008-11-18 | Concrete early-age contractility measuring instrument displacement probe fixing device |
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| Country | Link |
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| CN (1) | CN201387426Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813610A (en) * | 2010-04-15 | 2010-08-25 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| CN110132116A (en) * | 2019-05-31 | 2019-08-16 | 中国海洋石油集团有限公司 | The displacement sensing system of harmomegathus amount after measurement high temperature and pressure solidifying body solidifies |
-
2008
- 2008-11-18 CN CN200820168240U patent/CN201387426Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101813610A (en) * | 2010-04-15 | 2010-08-25 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| CN101813610B (en) * | 2010-04-15 | 2015-04-29 | 河海大学 | Testing device of volume compression coefficient of freshly mixed concrete under side-limit condition and testing method thereof |
| CN110132116A (en) * | 2019-05-31 | 2019-08-16 | 中国海洋石油集团有限公司 | The displacement sensing system of harmomegathus amount after measurement high temperature and pressure solidifying body solidifies |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100120 |
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| CX01 | Expiry of patent term |