CN215115520U - Concrete axle center tensile test device - Google Patents
Concrete axle center tensile test device Download PDFInfo
- Publication number
- CN215115520U CN215115520U CN202121268744.3U CN202121268744U CN215115520U CN 215115520 U CN215115520 U CN 215115520U CN 202121268744 U CN202121268744 U CN 202121268744U CN 215115520 U CN215115520 U CN 215115520U
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- anchor clamps
- concrete
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- panel
- trapezoidal
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- 238000009864 tensile test Methods 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 claims abstract description 54
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
- 239000010959 steel Substances 0.000 claims abstract description 30
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000012546 transfer Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000010998 test method Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006335 epoxy glue Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a concrete axle center tensile test device belongs to physical test technical field. The device is of an axisymmetric structure and comprises a test piece fixing device and a force transmission device; force transfer device is two cylindrical pull rods, test piece fixing device includes cuboid anchor clamps and four pyramid platform anchor clamps, and intercommunication each other between the two, and the size is unanimous with the concrete test piece, cuboid anchor clamps include a square panel, pull rod one end is fixed with the testing machine dop, and the pull rod other end is connected with the steel ball of fixing on square panel through the casing, the casing can rotate on the steel ball, four pyramid platform anchor clamps include four trapezoidal panels, and four trapezoidal panels link to each other with four curb plates of cuboid anchor clamps respectively, and are swing joint, and are fixed through the fastener between the adjacent trapezoidal panel. The device has simple and reasonable structure and convenient use, and can directly stretch test the concrete to obtain more real and reliable concrete tensile strength.
Description
Technical Field
The utility model relates to a concrete axle center tensile test device belongs to physical test technical field.
Background
At present, two methods are mainly used for testing the axial tensile strength of concrete, namely a direct testing method and an indirect testing method. In the direct test method, one method is to directly stretch the embedded steel bars through the two ends of a concrete test piece, and the other method is to stretch the embedded steel bars through bonding epoxy resin glue between the test piece and a pulling plate; the indirect test method is a splitting tensile test, the test is carried out by adopting a cubic test piece, the test piece is placed at the central position of a lower pressure plate of a compression testing machine, a pad strip is arranged between the upper pressure plate, the lower pressure plate and the test piece, so that the test piece is loaded in a corresponding strip shape from top to bottom, the test piece is promoted to be split and damaged along the center of the cube, and the tensile strength is obtained by conversion according to an empirical formula. In the direct test method, the problem of stress concentration is caused by stretching a concrete test piece by embedding the steel bars, so that the tensile strength result is inaccurate; carry out tensile needs to wait for tensile test piece and test block adhesive to glue through bonding epoxy glue and air-dry, and every test piece need clear up the arm-tie again after tensile finishing, and experimental duration is long and easy off-centre is drawn to lead to experimental data randomness big, reliability and accuracy are not high, and then cause the influence to the data processing in experimental later stage. Therefore, it is necessary to design a simple device to solve the problem, and the device has a wide application prospect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a concrete axle center tensile test device solves the unsafe problem of present concrete tensile strength result, and its advantage is avoided eccentric to be drawn and stress concentration, and the experimental result is accurate, easy operation, economical and practical.
The above technical purpose of the present invention is to be implemented by the following technical solution:
a concrete axle center tensile test device is of an axisymmetric structure and comprises a test piece fixing device and a force transmission device;
force transfer device is two cylindrical pull rods, test piece fixing device includes cuboid anchor clamps and four pyramid platform anchor clamps, and intercommunication each other between the two, and the size is unanimous with the concrete test piece, cuboid anchor clamps include a square panel, pull rod one end is fixed with the testing machine dop, and the pull rod other end is connected with the steel ball of fixing on square panel through the casing, the casing can rotate on the steel ball, four pyramid platform anchor clamps include four trapezoidal panels, and four trapezoidal panels link to each other with four curb plates of cuboid anchor clamps respectively, and are swing joint, and are fixed through the fastener between the adjacent trapezoidal panel.
Furthermore, the shell is in a hollow hemispherical shape, is sleeved on the outer surface of the steel ball and is matched with the steel ball.
Furthermore, a rectangular steel block is fixed at the center of the square panel, and a steel ball is fixed on the rectangular steel block.
Furthermore, the trapezoidal panel is connected with the side plate of the cuboid fixture through a hinge.
Furthermore, all be equipped with a plurality of screws on trapezoidal panel both sides, when four trapezoidal panels draw in, the screw position of two edges of adjacent trapezoidal panel staggers and inserts fixedly in the screw through rectangular nut.
The utility model discloses a theory of operation: when carrying out tensile test, make cuboid anchor clamps and the accurate lock of quadrangular frustum anchor clamps and concrete sample, pull rod one end is connected with the steel ball of cuboid anchor clamps top, and the pull rod other end is fixed mutually with the testing machine dop, thereby makes concrete stretch through testing machine tensile pull rod to directly obtain tensile strength.
Has the advantages that: the utility model discloses combine cuboid anchor clamps and four pyramid platform anchor clamps, make its and the accurate lock of concrete test piece, kept concrete axle center in whole testing process and pulled, avoided concrete off-centre to pull, improved the accuracy that concrete tensile strength index detected.
Drawings
FIG. 1: a schematic device structure diagram;
FIG. 2: a schematic view of a part of the apparatus;
FIG. 3: one end of the quadrangular frustum fixture is unfolded to form a top view;
reference numbers in the figures: 1-tester chuck, 2-pull rod, 3-shell, 4-steel ball, 5-rectangular steel block, 6-hinge, 7-side plate, 8-long nut, 9-screw hole, 10-trapezoidal panel, 11-concrete sample, 12-square panel.
Detailed Description
The invention will be further explained and explained in detail with reference to the drawings and the embodiments.
Example 1: as shown in fig. 1: a concrete axle center tensile test device is of an axisymmetric structure and comprises a test piece fixing device and a force transmission device;
force transfer device is two cylindrical pull rods 2, test piece fixing device includes cuboid anchor clamps and four pyramid platform anchor clamps, and intercommunication each other between the two, and the size is unanimous with concrete test piece 11, the cuboid anchor clamps include a square panel 12, 2 one ends of pull rod are fixed with testing machine dop 1, and 2 other ends of pull rod are connected with steel ball 4 of fixing on square panel 12 through casing 3, casing 3 can rotate on steel ball 4, four pyramid platform anchor clamps include four trapezoidal panels 10, and four trapezoidal panels 10 link to each other with four curb plates of cuboid anchor clamps respectively, and are swing joint, and are fixed through the fastener between the adjacent trapezoidal panel 10.
Specifically, the shell 3 is in a hollow hemispherical shape, is sleeved on the outer surface of the steel ball 4, and is matched with the steel ball 4, so that the rectangular clamp and the quadrangular frustum pyramid clamp are prevented from being influenced by eccentric tension after being tensioned.
The center of the square panel 12 is fixed with a rectangular steel block 5, and the steel ball 4 is fixed on the rectangular steel block 5, so that the steel ball 4 is more stable.
The trapezoidal panel 10 is connected with the side plate 7 of the cuboid fixture through the hinge 6, the hinge 6 can be provided with two hinges or can be changed into other suitable connecting pieces, and the trapezoidal panel 10 can move along the side plate 7.
All be equipped with a plurality of screw 9 on trapezoidal panel 10 both sides, when four trapezoidal panels 10 draw in, the screw 9 position on two edges of adjacent trapezoidal panel 10 staggers and inserts screw 9 through rectangular nut 8 and fix, can set to the form as shown in fig. 3, set up three screw 9 respectively on two edges of trapezoidal panel 10, wherein two are adjacent, another interval certain distance, and screw 9 position on two curb plates of adjacent trapezoidal panel 10 mutually supports, can link into a straight line, the rethread is fixed by rectangular nut 8.
When the device is used, the concrete test piece 11 is horizontally placed, then the four trapezoidal panels 10 are opened, the end head of one side of the concrete test piece 11 is placed into the rectangular clamp, and then the four prismatic positions of the concrete test piece 11 are closed and clamped through the four trapezoidal panels 10 with the same size; after a test piece is clamped, adjacent trapezoidal panels 10 are screwed and fixed through screw holes 9 and strip nuts 8 inserted into the screw holes, four ends of the trapezoidal panels are locked to form a regular quadrangular frustum pyramid-shaped firm clamping sleeve, and a quadrangular frustum pyramid at the end part of a concrete test piece 11 is fixed; and repeating the operation, and fixing the end head of the other side of the concrete sample 11 through the clamp.
Example 2: the structure and size of the quadrangular frustum pyramid shaped test piece and the fixture are further explained in the embodiment:
the concrete axle center tensile test device in embodiment 1 matches with corresponding concrete tensile test piece 11, concrete test piece 11 wholly is the dumbbell type, the middle pure tensile part that bears the axle center load for the test piece, this part is the cuboid, cuboid cross sectional dimension is 100mm, length is 200mm, the both ends of tip dop are positive four-edged desk, positive four-edged desk comprises four-edged desk and the platform bottom that the size is 200mm 50mm, the cross sectional dimension of the four-edged desk of part is 100mm with test piece middle part cuboid axle center connection, the four-edged desk bottom cross sectional dimension of contacting with square panel 12 is 200 mm. Trapezoidal panel 10 is isosceles trapezoid, and trapezoidal upper base length is 200mm, and lower base length is 100mm, and the height is 112mm, and the waist length is about 123mm, and square panel 12 size is 200mm, and curb plate 7 height 50mm just blocks with the end of concrete test piece 11.
Opening the testing machine, adjusting the position of the bayonet of the testing machine to enable the bayonet to be matched with the size of the concrete sample 11, the size of the cuboid clamp and the size of the quadrangular frustum clamp, then placing the concrete sample 11 on the tensile testing machine, and fixedly clamping the pull rods 2 on two sides and the chuck 1 of the testing machine. And starting the testing machine to carry out a tensile test, and directly measuring the tensile strength value of the test piece. After the experiment is accomplished, loosen testing machine dop 1, take out cuboid anchor clamps and four pyramid platform anchor clamps and concrete sample 11 and the level is placed, turn round the rectangular nut 8 of pine in proper order and extract screw 9 with rectangular nut 8, then open trapezoidal panel 10, take out concrete sample 11.
While the present invention has been particularly shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a concrete axle center tensile test device which characterized in that: the device is in an axisymmetric structure and comprises a test piece fixing device and a force transmission device;
force transfer device is two cylindrical pull rods (2), test piece fixing device includes cuboid anchor clamps and four pyramid platform anchor clamps, intercommunication each other between the two, and the size is unanimous with concrete test piece (11), the cuboid anchor clamps include a square panel (12), pull rod (2) one end is fixed with testing machine dop (1), and the pull rod (2) other end is connected with steel ball (4) of fixing on square panel (12) through casing (3), casing (3) can rotate on steel ball (4), four pyramid platform anchor clamps include four trapezoidal panels (10), and four trapezoidal panels (10) link to each other with four curb plates (7) of cuboid anchor clamps respectively, and are swing joint, and are fixed through the fastener between adjacent trapezoidal panel (10).
2. The concrete axial tensile test device of claim 1, wherein: the shell (3) is in a hollow hemispherical shape, is sleeved on the outer surface of the steel ball (4) and is matched with the steel ball (4).
3. The concrete axial tensile test device of claim 1, wherein: a rectangular steel block (5) is fixed at the center of the square panel (12), and a steel ball (4) is fixed on the rectangular steel block (5).
4. The concrete axial tensile test device of claim 1, wherein: the trapezoidal panel (10) is connected with the side plate (7) of the cuboid fixture through a hinge (6).
5. The concrete axial tensile test device of claim 1 or 4, wherein: all be equipped with a plurality of screw (9) on trapezoidal panel (10) both sides, when four trapezoidal panel (10) draw in, screw (9) position stagger on two edges of adjacent trapezoidal panel (10) and insert screw (9) through rectangular nut (8) and fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121268744.3U CN215115520U (en) | 2021-06-08 | 2021-06-08 | Concrete axle center tensile test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121268744.3U CN215115520U (en) | 2021-06-08 | 2021-06-08 | Concrete axle center tensile test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215115520U true CN215115520U (en) | 2021-12-10 |
Family
ID=79303153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121268744.3U Expired - Fee Related CN215115520U (en) | 2021-06-08 | 2021-06-08 | Concrete axle center tensile test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215115520U (en) |
-
2021
- 2021-06-08 CN CN202121268744.3U patent/CN215115520U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211210 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |