CN202195799U - Steel bar electronic average value extensometer - Google Patents
Steel bar electronic average value extensometer Download PDFInfo
- Publication number
- CN202195799U CN202195799U CN2011200130238U CN201120013023U CN202195799U CN 202195799 U CN202195799 U CN 202195799U CN 2011200130238 U CN2011200130238 U CN 2011200130238U CN 201120013023 U CN201120013023 U CN 201120013023U CN 202195799 U CN202195799 U CN 202195799U
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- screw
- gauge length
- slide rail
- extensometer
- slide
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Abstract
A steel bar electronic average value extensometer can measure steel bar mechanical connection sample deformation. The steel bar electronic average value extensometer is a resistor strain extensometer with an elastic element; the elastic element is provided with an upper sensing arm and a lower sensing arm; the upper sensing arm and the lower sensing arm are respectively provided with an upper gauge length slide rail and a lower gauge length slide rail; and an upper blade slide carriage and a lower blade slide carriage respectively slide on the upper gauge length slide rail and the lower gauge length slide rail and then fixed. In the utility model, a gauge length can be continuously changed in the range from 78 mm to 302 mm, which is adapted to the mechanical connection test of the steel bar in the range from 12 mm to 40 mm. In the utility model, a certain gauge length screw is arranged far from the steel bar axis, and the middle of the extensometer is not contacted to the mechanical connection joint of the steel bar.
Description
Affiliated technical field
The utility model relates to a kind of length measuring instrument, and especially the energy measurement reinforcing steel bar machinery connects the electronic extensometer of the axial elongation distortion of tension test.
Background technology
At present; Known axial electronic extensometer can only measurement standard the axial deformation of tensile sample, and the gauge length of this kind electronic extensometer fixes, the reinforcing steel bar machinery that connects with screw shell of energy measurement connects the distortion of sample; Because when the reinforcing bar of different-diameter is done test; It is inequality requiring the gauge length of extensometer, and the diameter of reinforcing bar commonly used has 15 kinds of specifications from 12mm to 40mm, require extensometer to have 15 kinds of gauge lengths 78mm-260mm scope planted agent; And connecting the sample middle part at reinforcing steel bar machinery has a joint that diameter is bigger, and known electronic extensometer can not adapt to these conditions.
Summary of the invention
Can not realize that in order to overcome existing electronic extensometer there is the shortcoming of larger-diameter joint at 15 kinds or more gauge length and incompatibility reinforcing bar sample middle part; The utility model provides a kind of electronic extensometer; Its gauge length can change between 78mm-302mm continuously; Promptly be to realize 15 kinds of gauge lengths and more gauge length, and bigger space is arranged in the middle part of the structure of the utility model, under the situation that larger-diameter joint is arranged in the middle of the reinforcing steel bar machinery connection sample, also can use.
The utility model solves the technical scheme that its technical matters adopted: design reinforcing bar electronics mean value extensometer; Comprise cutter slide (3), go up gauge length slide rail (4), trip bolt (5), gauge length pad (6), go up pickup arm (7), the journey of limiting the quantity of screw (8), flexible member (9), resistance strain gage (10), set nut (11), calibration apart from screw (12), down pickup arm (13), gauge length slide rail (14), bottom knife slide (15), elastic are hung arm (16) and (20), bottom knife (17), cutter (21) down; It is characterized in that: described resistance strain gage (10) is attached on the vertical part of flexible member (9); It is fastening on it that pickup arm (7) will be gone up with screw nut in the top of flexible member (9); Last gauge length slide rail (4) is installed in the right-hand member of pickup arm (7) with screw nut; Cutter slide (3) is installed in screw on the slide rail of gauge length slide rail (4), and the right-hand member of cutter slide (3) is installed elastic with screw nut and hung arm (20) and cutter (21); The bottom of flexible member (9) will descend pickup arm (13) fastening on it with screw nut; The screw at the middle part of following pickup arm (13) screws in calibration apart from screw (12); Calibration screws in the journey screw (8) of limiting the quantity of apart from the top of screw (12); Following gauge length slide rail (14) is installed in down the right-hand member of pickup arm (13) with screw nut, and bottom knife slide (15) is installed in down with screw on the slide rail of gauge length slide rail (14), and the right-hand member of bottom knife slide (15) is installed elastic with screw nut and hung arm (16) and bottom knife (17).Last gauge length slide rail (4) and following gauge length slide rail (14) respectively have different four of length; After the size and position reasonable disposition with gauge length slide rail (4), following gauge length slide rail (14), cutter slide (3) and bottom knife slide (15) on these, just can realize gauge length continuous variable between 78mm-302mm of the utility model.The calibration of reinforcing bar electronics mean value extensometer on the last gauge length slide rail (4) and the left side of gauge length slide rail (14) down, has guaranteed therefore that the part of the utility model can not collide with thread connecting joint (1) apart from the location arrangements of screw (12).
The beneficial effect of the utility model is to measure the distortion that reinforcing steel bar machinery connects sample, for each construction-engineering project provides technical information and safety guarantee.
Description of drawings
Fig. 1 is the front elevation of the utility model; Fig. 2 is a vertical view; Fig. 3 is the partial view that the arrow K from Fig. 1 sees.
Embodiment
In Fig. 1, the vertical part of flexible member (9) is posted four resistance strain gages (10), and four resistance strain gages are formed an electric bridge, and this electric bridge is received in the metering circuit of electronic universal material testing machine with cable.There is a screw at the middle part of following pickup arm (13); Calibration matches with the internal thread of the screw of following pickup arm (13) apart from the external thread of screw (12); Calibration is placed with gauge length pad (6) between the lower plane of the upper surface of screw (12) and last pickup arm (7), the rotation calibration can make flexible member (9) slightly open apart from the head that has straight knurling of screw (12); The distance of cutter (21) and bottom knife (17) is omited for a change, to reach the purpose of adjustment extensometer gage length L.After the gauge length of extensometer mixes up, will calibrate apart from screw (12) with set nut (11) and tighten up, itself and following pickup arm (13) are not relatively rotated.Calibration has been done screw apart from the top of screw (12) along axis direction, and the journey of limiting the quantity of screw (8) screws in the screw of calibration apart from screw (12) afterwards through the through hole at last pickup arm (7) middle part and the breach of gauge length pad (6).The effect of the journey of limiting the quantity of screw (8) is that limiting uploading sense arm (7) descends the angle of pickup arm (13) rotation not too big relatively; Supreme pickup arm (7) is run into till the lower surface of head of the journey screw (8) of limiting the quantity of; So just limited the relative displacement between the point of a knife of two blades; Just limit the range of extensometer, protected flexible member (9) can not be damaged.
Following pickup arm (13) to be shaped as rectangle rectangular, rectangular left end is drilled with two apertures, rectangular middle part is processed with a screw, rectangular right-hand member is drilled with an aperture, the axial line in these holes is parallel to each other.
Identical and the image angle chi all of the shape of last gauge length slide rail (4) and following gauge length slide rail (14); Be milled with groove and be drilled with through hole on their branch, their groove cooperates with last pickup arm (7) and following pickup arm (13) respectively, and tightens up with screw nut; Their another branch is that smooth rectangle is rectangular; Play slide rail, be processed with two screws on each rectangle is rectangular, be used for fixing cutter slide (3) and bottom knife slide (15).
Identical and the also image angle chi all of the shape of cutter slide (3) and bottom knife slide (15); Be milled with groove and elongated hole (see figure 3) on their branch; So that go up slip at last gauge length slide rail (4) and following gauge length slide rail (14), when sliding into desired gauge length, just use screw (19) to tighten up; Respectively be drilled with two apertures on their another branch, be installed in accordingly on each branch so that elastic is hung arm (20) and (16) and cutter (21) and bottom knife (17) with screw nut.Adopt after such the gauge length slide rail and blade slide, can make the gauge length of the utility model between 78mm-302mm, do to change continuously, promptly the gauge length number of the utility model can be far longer than 15.Hang two hook-shaped troughs of arm (16) and use bungee through elastic on bottom knife (17) the d point that is pressed in rebar surface tightly; Equally also with bungee with on cutter (21) a point that is pressed in rebar surface tightly; Like this, an extensometer on the reinforcing bar left side has just installed, and at last gauge length pad (6) is extracted out; Purpose is to cause a gap, prevents the inner other strength of extensometer.When reinforcing bar is stretched when long; Gauge length between a point and the d point changes; Same relative displacement takes place in the point of a knife of two blades; Make the vertical portion of flexible member (9) divide generation flexural deformation, the resistance of resistance strain gage (10) changes, and the metering circuit of electronic universal material testing machine has just measured the elongation strain of reinforcing bar.
In order to deduct the flexural deformation that reinforcing bar is produced by eccentric tension; Should on the p point of the o of reinforcing bar epimere (2) point and reinforcing bar hypomere (18), refill an identical extensometer (not drawing in the accompanying drawing) symmetrically; The output signal of two extensometers is averaged in the metering circuit of electronic universal material testing machine; Just can obtain the pure stretcher strain of reinforcing bar, so just constitute reinforcing bar electronics mean value extensometer.
Claims (5)
1. reinforcing bar electronics mean value extensometer; Comprise cutter slide (3), go up gauge length slide rail (4), trip bolt (5), gauge length pad (6), go up pickup arm (7), the journey of limiting the quantity of screw (8), flexible member (9), resistance strain gage (10), set nut (11), calibration apart from screw (12), down pickup arm (13), gauge length slide rail (14), bottom knife slide (15), elastic are hung arm (16) and (20), bottom knife (17), cutter (21) down; It is characterized in that: described resistance strain gage (10) is attached on the vertical part of flexible member (9); It is fastening on it that pickup arm (7) will be gone up with screw nut in the top of flexible member (9); Last gauge length slide rail (4) is installed in the right-hand member of pickup arm (7) with screw nut; Cutter slide (3) is installed in screw on the slide rail of gauge length slide rail (4), and the right-hand member of cutter slide (3) is installed elastic with screw nut and hung arm (20) and cutter (21); The bottom of flexible member (9) will descend pickup arm (13) fastening on it with screw nut; The screw at the middle part of following pickup arm (13) screws in calibration apart from screw (12); Calibration screws in the journey screw (8) of limiting the quantity of apart from the top of screw (12); Following gauge length slide rail (14) is installed in down the right-hand member of pickup arm (13) with screw nut, and bottom knife slide (15) is installed in down with screw on the slide rail of gauge length slide rail (14), and the right-hand member of bottom knife slide (15) is installed elastic with screw nut and hung arm (16) and bottom knife (17).
2. reinforcing bar electronics mean value extensometer according to claim 1 is characterized in that: described calibration has the head of annular knurl apart from an end of screw (12), and the other end has axial screw.
3. reinforcing bar electronics mean value extensometer according to claim 1; It is characterized in that: the identical and image angle chi all of the described shape that goes up gauge length slide rail (4) and following gauge length slide rail (14); Be milled with groove and be drilled with through hole on their branch; Another branch is that smooth rectangle is rectangular, is processed with two screws on each rectangle is rectangular.
4. reinforcing bar electronics mean value extensometer according to claim 1; It is characterized in that: the identical and image angle chi all of the shape of described cutter slide (3) and bottom knife slide (15); Be milled with groove and elongated hole on their branch, be drilled with two apertures on another branch.
5. reinforcing bar electronics mean value extensometer according to claim 1; It is characterized in that: described down pickup arm (13) to be shaped as rectangle rectangular; Rectangular left end is drilled with two apertures; Rectangular middle part is processed with a screw, and rectangular right-hand member is drilled with an aperture, and the axial line in these holes is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200130238U CN202195799U (en) | 2011-01-05 | 2011-01-05 | Steel bar electronic average value extensometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200130238U CN202195799U (en) | 2011-01-05 | 2011-01-05 | Steel bar electronic average value extensometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202195799U true CN202195799U (en) | 2012-04-18 |
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ID=45950702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200130238U Expired - Fee Related CN202195799U (en) | 2011-01-05 | 2011-01-05 | Steel bar electronic average value extensometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202195799U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352799A (en) * | 2015-11-09 | 2016-02-24 | 浙江大学 | Double-tuning-fork-shaped elastomer extensometer and measuring method |
| CN106596286A (en) * | 2016-12-27 | 2017-04-26 | 中国南方航空工业(集团)有限公司 | Non-lateral force stable measurement device for high-temperature axial strain fatigue test |
| CN109974657A (en) * | 2019-04-03 | 2019-07-05 | 威海汇智机电科技有限公司 | A kind of connecting device for sensor and average value extensometer of average value extensometer |
-
2011
- 2011-01-05 CN CN2011200130238U patent/CN202195799U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352799A (en) * | 2015-11-09 | 2016-02-24 | 浙江大学 | Double-tuning-fork-shaped elastomer extensometer and measuring method |
| CN106596286A (en) * | 2016-12-27 | 2017-04-26 | 中国南方航空工业(集团)有限公司 | Non-lateral force stable measurement device for high-temperature axial strain fatigue test |
| CN106596286B (en) * | 2016-12-27 | 2019-07-02 | 中国航发南方工业有限公司 | High temperature axial strain fatigue test spends lateral force stably measured device |
| CN109974657A (en) * | 2019-04-03 | 2019-07-05 | 威海汇智机电科技有限公司 | A kind of connecting device for sensor and average value extensometer of average value extensometer |
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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: 20120418 Termination date: 20150105 |
|
| EXPY | Termination of patent right or utility model |