CN209485860U - A kind of concrete for hydraulic structure Fatigue Cracking Test device - Google Patents
A kind of concrete for hydraulic structure Fatigue Cracking Test device Download PDFInfo
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- CN209485860U CN209485860U CN201822071882.7U CN201822071882U CN209485860U CN 209485860 U CN209485860 U CN 209485860U CN 201822071882 U CN201822071882 U CN 201822071882U CN 209485860 U CN209485860 U CN 209485860U
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Abstract
The utility model discloses a kind of concrete for hydraulic structure Fatigue Cracking Test devices, including lower erecting bed and flexural pivot, the lower erecting bed is equipped with first axle and the second axis, test specimen is placed in first axle and the second axis, third axis and the 4th axis are placed in the upper surface of test specimen, third axis and the 4th axis are connect by adjustable component with lower erecting bed, the both ends of first axle and the second axis are connect with junction steel plate respectively, junction steel plate is hinged with connecting rod, connecting rod is hinged with hinged shaft, hinged shaft is mounted on connecting cylinder, connecting cylinder is connect by attachment device with flexural pivot, flexural pivot is connect with upper erecting bed；First axle, the second axis, third axis and the 4th axis are fixed on test specimen by adjustable component, upper erecting bed drives flexural pivot to move up, flexural pivot drives junction steel plate to move up, junction steel plate drives first axle and the second axis to press test specimen, the upper surface of third axis and the 4th axis pressing test specimen, realizes 4 points of curved purposes of test specimen.
Description
Technical field
The present invention relates to a kind of concrete for hydraulic structure Fatigue Cracking Test devices, belong to mechanical testing equipment field.
Background technique
Since rectangular coupon is easy to process, and it is specious, therefore, in concrete for hydraulic structure correlation test regulation, often
Recommend to carry out the test of fatigue fracture bending property using three-point bending beam or four_point bending beam.It is tried different from three-point bending beam
Part, four_point bending beam test specimen can be realized a uniform maximum stress region in its span, split to research concrete for hydraulic structure
Seam propagation behavior is particularly significant, and therefore, four_point bending beam test specimen is in terms of concrete for hydraulic structure fatigue behaviour and fracture propagation mechanism
Research in obtained extensively application.Four_point bending beam fatigue test requires load centering, particularly with the prefabricated crack of Intermediate Gray
Four_point bending beam test specimen, be to carry out the precondition of concrete for hydraulic structure Fatigue Cracking Test, but generally make at present in load pair
Four_point bending beam fatigue experimental device cannot achieve uniform load as shown in Figure 1, cannot be guaranteed accurate centering, because
This, causes surface of test piece stress distribution uneven, reduces stringency of test.For this purpose, inventing one kind can be realized real-time adjusting
The four_point bending beam Fatigue Cracking Test fixture of centering is of crucial importance.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, it is disconnected that the present invention provides a kind of concrete for hydraulic structure fatigue
Split experimental rig, be equipped with flexural pivot in test piece upper part, in 4 points of curved tests, by original 4 points it is curved drawings is converted by pressure, it is sharp
With flexural pivot, 4 points to neutral good.
Technical solution: in order to solve the above technical problems, concrete for hydraulic structure Fatigue Cracking Test device of the invention, including under
Erecting bed and flexural pivot, the lower erecting bed are equipped with first axle and the second axis, and test specimen is placed in first axle and the second axis, is trying
The upper surface of part is placed with third axis and the 4th axis, and third axis and the 4th axis are connect by adjustable component with lower erecting bed, the
The both ends of one axis and the second axis are connect with junction steel plate respectively, and junction steel plate is hinged with connecting rod, and connecting rod is hinged with hinged shaft, hinge
Axis is mounted on connecting cylinder, and connecting cylinder is connect by attachment device with flexural pivot, and flexural pivot is connect with upper erecting bed；Pass through adjustable whole group
First axle, the second axis, third axis and the 4th axis are fixed on test specimen by part, and upper erecting bed drives flexural pivot to move up, and flexural pivot, which drives, to be connected
It connects steel plate to move up, junction steel plate drives first axle and the second axis presses test specimen, and the upper surface of third axis and the 4th axis pressing test specimen is real
Existing 4 points of curved purposes of test specimen.
Preferably, the adjustable component includes U-shaped connector, the both ends of the U-shaped connector are equipped with U-type groove, the
Three axis and third axle position are equipped with external screw thread at the both ends of U-shaped connector, third axis and the 4th axis are placed on U-type groove in U-type groove
It is interior, third axis and the 4th axis are fixed by the locking nut at U-shaped connector both ends.
Preferably, the flexural pivot includes ontology and connecting column, cavity is equipped in the ontology, cavity bottom is equipped with interior spiral shell
Line, cavity top are arc shape, and the bottom end of connecting column is equipped with arc boss, and the bottom of cavity is equipped with through-hole, and connecting column passes through logical
The bottom in hole, cavity is equipped with connecting plate by screw thread, and connecting plate is fixedly connected with link block.
Preferably, the attachment device is steel pole, the steel pole is welded on connecting plate, is welded at the top of connecting cylinder
Top cover, top cover are equipped with through-hole, and steel pole passes through top cover, and the top of steel pole is equipped with screw thread, and steel pole is connect by nut with top cover.
The utility model has the advantages that concrete for hydraulic structure Fatigue Cracking Test device of the invention, is equipped with flexural pivot in test piece upper part, at 4 points
When curved test, by original 4 points it is curved drawings is converted by pressure, using flexural pivot, 4 points to neutral good, and pass through U-shaped connector
And locking nut, realize the fixation to third axis and the 4th axis.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of existing apparatus.
Fig. 2 is structural schematic diagram of the invention.
Fig. 3 is the structural schematic diagram of adjustable component.
Fig. 4 is the structural schematic diagram of flexural pivot.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Figures 2 to 4, concrete for hydraulic structure Fatigue Cracking Test device of the invention, including lower erecting bed 9 and flexural pivot
1, the lower erecting bed 9 is equipped with first axle 7 and the second axis 10, and test specimen 6 is placed in first axle 7 and the second axis 10, in test specimen 6
Upper surface be placed with third axis 5 and the 4th axis 12, third axis 5 and the 4th axis 12 are connected by adjustable component 8 and lower erecting bed 9
Connect, the both ends of first axle 7 and the second axis 10 are connect with junction steel plate respectively, and junction steel plate and connecting rod 4 are hinged, connecting rod 4 with
Hinged shaft 3 is hinged, and hinged shaft 3 is mounted on connecting cylinder 2, and connecting cylinder 2 is connect by attachment device with flexural pivot 1, flexural pivot 1 and upper erecting bed
Connection；First axle 7, the second axis 10, third axis 5 and the 4th axis 12 are fixed on test specimen 6 by adjustable component 8, upper installation
Platform drives flexural pivot 1 to move up, and flexural pivot 1 drives junction steel plate to move up, and junction steel plate drives first axle 7 and the second axis 10 presses test specimen 6, the
The upper surface of three axis 5 and the 4th axis 12 pressing test specimen 6, realizes 6 four points of curved purposes of test specimen.
In the present invention, the adjustable component 8 includes U-shaped connector 81, and the both ends of the U-shaped connector 81 are equipped with U
Type groove, third axis 5 and third axis 5 are located in U-type groove, are equipped with external screw thread, third axis 5 and the 4th at the both ends of U-shaped connector 81
Axis 12 is placed in U-type groove, by the locking nut 82 at U-shaped 81 both ends of connector that third axis 5 and the 4th axis 12 is fixed.
In the present invention, the flexural pivot 1 includes ontology 14 and connecting column 13, is equipped with cavity, cavity bottom in the ontology 14
Portion is equipped with internal screw thread, and cavity top is arc shape, and the bottom end of connecting column 13 is equipped with arc boss, and the bottom of cavity is equipped with through-hole,
Connecting column 13 passes through through-hole, and the bottom of cavity is equipped with connecting plate 15 by screw thread, and connecting plate 15 is fixedly connected with link block.
In the present invention, the attachment device is steel pole 16, and the steel pole 16 is welded on connecting plate 15, connecting cylinder 2
Top is welded with top cover, and top cover is equipped with through-hole, and steel pole 16 passes through top cover, and the top of steel pole 16 is equipped with screw thread, and steel pole 16 passes through spiral shell
Mother connect with top cover.
In the use of the present invention, first axle 7 and the second axis 10 are placed on designated position, test specimen 6 is placed, by third axis 5
It is pressed on 6 surface of test specimen with the 4th axis 12, tightens locking nut 82, starts testing machine, upper erecting bed drives flexural pivot 1 to move up, ball
1 drive junction steel plate of hinge moves up, and junction steel plate drives first axle 7 and the second axis 10 to press test specimen 6, and third axis 5 and the 4th axis 12 are pressed
The upper surface of test specimen 6 is pressed, realizes 6 four points of curved purposes of test specimen.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of concrete for hydraulic structure Fatigue Cracking Test device, it is characterised in that: including lower erecting bed and flexural pivot, the lower installation
Platform is equipped with first axle and the second axis, and test specimen is placed in first axle and the second axis, is placed with third axis in the upper surface of test specimen
With the 4th axis, third axis and the 4th axis are connect by adjustable component with lower erecting bed, the both ends difference of first axle and the second axis
It is connect with junction steel plate, junction steel plate is hinged with connecting rod, and connecting rod is hinged with hinged shaft, and hinged shaft is mounted on connecting cylinder, connection
Cylinder is connect by attachment device with flexural pivot, and flexural pivot is connect with upper erecting bed；By adjustable component by first axle, the second axis,
Three axis and the 4th axis are fixed on test specimen, and upper erecting bed drives flexural pivot to move up, and flexural pivot drives junction steel plate to move up, junction steel plate band
Dynamic first axle and the second axis press test specimen, and 4 points of curved purposes of test specimen are realized in the upper surface of third axis and the 4th axis pressing test specimen.
2. concrete for hydraulic structure Fatigue Cracking Test device according to claim 1, it is characterised in that: the adjustable component
Comprising U-shaped connector, the both ends of the U-shaped connector are equipped with U-type groove, third axis and the 4th axle position in U-type groove, in U-shaped company
The both ends of fitting are equipped with external screw thread, and third axis and the 4th axis are placed in U-type groove, pass through the locking nut at U-shaped connector both ends
Third axis and the 4th axis are fixed.
3. concrete for hydraulic structure Fatigue Cracking Test device according to claim 1, it is characterised in that: the flexural pivot includes this
Body and connecting column, the ontology is interior to be equipped with cavity, and cavity bottom is equipped with internal screw thread, and cavity top is arc shape, the bottom of connecting column
End is equipped with arc boss, and the bottom of cavity is equipped with through-hole, and connecting column passes through through-hole, and the bottom of cavity is equipped with connection by screw thread
Plate, connecting plate are fixedly connected with link block.
4. concrete for hydraulic structure Fatigue Cracking Test device according to claim 3, it is characterised in that: the attachment device is
Steel pole, the steel pole are welded on connecting plate, and top cover is welded at the top of connecting cylinder, and top cover is equipped with through-hole, and steel pole passes through top cover,
The top of steel pole is equipped with screw thread, and steel pole is connect by nut with top cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071882.7U CN209485860U (en) | 2018-12-11 | 2018-12-11 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822071882.7U CN209485860U (en) | 2018-12-11 | 2018-12-11 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209485860U true CN209485860U (en) | 2019-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822071882.7U Active CN209485860U (en) | 2018-12-11 | 2018-12-11 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
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| CN (1) | CN209485860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459305A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
-
2018
- 2018-12-11 CN CN201822071882.7U patent/CN209485860U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459305A (en) * | 2018-12-11 | 2019-03-12 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of concrete for hydraulic structure Fatigue Cracking Test device |
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