CN112683660A - Clamp for steel-plastic geogrid tensile test - Google Patents
Clamp for steel-plastic geogrid tensile test Download PDFInfo
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- CN112683660A CN112683660A CN202011449270.2A CN202011449270A CN112683660A CN 112683660 A CN112683660 A CN 112683660A CN 202011449270 A CN202011449270 A CN 202011449270A CN 112683660 A CN112683660 A CN 112683660A
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- clamp
- block
- steel
- tensile test
- placing frame
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- 239000004033 plastic Substances 0.000 title claims abstract description 53
- 229920003023 plastic Polymers 0.000 title claims abstract description 53
- 238000009864 tensile test Methods 0.000 title claims abstract description 33
- 238000007906 compression Methods 0.000 claims abstract description 29
- 230000006835 compression Effects 0.000 claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims description 7
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a clamp for a steel-plastic geogrid tensile test, wherein a connecting structure is arranged on an outer side plate of a clamp placing frame, the inner side surface of the clamp placing frame is of an open structure, a first clamp and a second clamp are sequentially placed inside each clamp placing frame from inside to outside, the first clamp and the second clamp are similar in structure and respectively comprise a pressure block fixed at the bottom in the clamp placing frame, a pressure applying block is arranged above the pressure block, 2 lower supporting arms are symmetrically and rotatably arranged at the top of the pressure applying block, the other end of each lower supporting arm is hinged with one end of 1 upper supporting arm, the other end of each upper supporting arm is rotatably connected with a top connecting block, 1 lead screw penetrates between the connecting ends of the 2 upper and lower supporting arms, and one end of each lead screw is provided with an adjusting nut, the extrusion surfaces of the compression block and the pressure applying block of the first clamp are planes, and the extrusion surfaces of the compression block and the pressure applying block of the second clamp are uniformly provided with a plurality of grooves. The clamp can completely clamp the steel-plastic geogrid, so that the steel bars and the plastic are synchronously pulled.
Description
Technical Field
The invention relates to a clamp for a tensile test, in particular to a clamp for a steel-plastic geogrid tensile test.
Background
The steel-plastic geogrid is compounded with Polyethylene (PE) or polypropylene (PP) through special treatment of high-strength steel wires (or other fibers) and is added with other additives to form a composite high-strength tensile strip through an extrusion process. The steel-plastic geogrid can be applied to the fields of reinforcing soft soil foundations such as highways, railways, abutment platforms, approaches, wharfs, dams, slag grounds and the like, retaining walls, pavement crack resistance engineering and the like, and therefore needs to have certain tensile strength.
When a steel-plastic geogrid tensile test is carried out, due to the fact that steel wires and outer layer wrapping materials are different, under the clamping of a traditional clamp in the tensile process, the situations that the steel wires and plastics are not synchronous in the tensile process, the steel-plastic geogrid falls off from the clamp, the plastics are damaged by clamping and the like can occur, and the tensile strength, the elongation and the like of the steel-plastic geogrid cannot be accurately measured.
Disclosure of Invention
The invention aims to provide a clamp for a steel-plastic geogrid tensile test. The steel-plastic geogrid can be completely clamped, so that the steel bars and the plastic are synchronously pulled, the tensile strength and the elongation of the steel-plastic geogrid can be accurately measured, and the steel-plastic geogrid has the characteristics of simplicity in operation and capability of ensuring the effectiveness and the accuracy of an experiment.
The technical scheme of the invention is as follows: a clamp for steel-plastic geogrid tensile test comprises 2 clamp placing frames which are identical in structure and arranged in opposite directions, a connecting structure is arranged on an outer side plate of each clamp placing frame, the inner side surface of each clamp placing frame is of an open structure, a first clamp and a second clamp are sequentially placed inside each clamp placing frame from inside to outside, the first clamp and the second clamp are similar in structure and respectively comprise a pressure piece fixed at the bottom in each clamp placing frame, a pressure applying component is arranged above each pressure piece and comprises a pressure applying piece located at the bottommost part, 2 lower supporting arms are symmetrically and rotatably arranged at the tops of the pressure applying pieces, the other ends of the lower supporting arms are hinged with one ends of 1 upper supporting arm, the other ends of the upper supporting arms are rotatably connected with a top connecting block, 1 lead screw penetrates through the connecting ends of the 2 upper and lower supporting arms, and one end of each lead screw is provided with an adjusting nut, the extrusion surfaces of the compression block and the pressure applying block of the first clamp are planes, and the extrusion surfaces of the compression block and the pressure applying block of the second clamp are uniformly provided with a plurality of grooves.
In the clamp for the steel-plastic geogrid tensile test, the thickness of the compression block of the first clamp is smaller than that of the compression block of the second clamp.
In the clamp for the steel-plastic geogrid tensile test, the front side and the rear side of the clamp placing frame are both of open structures.
In the aforesaid an anchor clamps for steel-plastic geogrid tensile test, the frame bottom is placed to anchor clamps front and back both sides and is equipped with the flange board that outwards stretches out, be equipped with the screw hole on the flange board.
In the clamp for the steel-plastic geogrid tensile test, the front side and the rear side of the pressed block are provided with the threaded counter bores, and the pressed block is fixedly connected with the clamp placing frame through the screws.
In the clamp for the steel-plastic geogrid tensile test, the bottom of the compression block of the first clamp is provided with the cushion block.
In the fixture for the steel-plastic geogrid tensile test, the top connecting block is fixedly connected with the inner top wall of the fixture placing frame.
In the aforementioned clamp for steel-plastic geogrid tensile test, the top of the top connecting block is fixedly connected with an installation block, and the installation block is fixedly connected with the top of the clamp placing frame through a bolt.
In the aforementioned anchor clamps that are used for steel to mould geogrid tensile test, go up between support arm and the lower support arm and connect through the round pin axle, sell epaxial square piece that is provided with, be equipped with the lead screw hole of wearing on the square piece, be equipped with adjusting nut on the lead screw in the square piece outside.
The invention has the beneficial effects that: compared with the prior art, the clamp comprises a first clamp and a second clamp, wherein the second clamp is used for clamping the steel wire, and the first clamp is used for clamping the steel wire and the plastic material wrapping the steel wire. The pressing blocks and the pressed blocks of the two clamps are clamped and separated by pressing components. The pressing member is manufactured on the basis of the geometric principle that the two sides of the isosceles triangle are unchanged and the height of the isosceles triangle is adjusted through the telescopic pressing block, and the length of the bottom side of the isosceles triangle is adjusted through the screw rod and the nut. The extrusion surface of the second clamp compression block is provided with a plurality of grooves with elliptical sections and parallel directions with steel-plastic geogrid tensioned steel wires, and the grooves increase the contact area and friction force between the extrusion surface and the steel wires, so that the steel wires are further clamped. The steel-plastic geogrid tensile test fixture solves the problem that the fixture is difficult to clamp the geogrid during the steel-plastic geogrid tensile test, and has the characteristics of simplicity in operation and capability of ensuring effectiveness and accuracy of the test.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the split structure of FIG. 1;
FIG. 3 is a schematic elevational view of FIG. 1;
FIG. 4 is a schematic elevation view of a second fixture;
FIG. 5 is a state diagram of the present invention in use;
FIG. 6 is a schematic top view of the jig placement frame;
FIG. 7 is a structural diagram of a compression block of the second fixture;
FIG. 8 is a schematic diagram of a matching structure of an adjusting nut and a square block;
FIG. 9 is a schematic structural diagram of the whole set of tensile testing apparatus.
Reference numerals: 1-clamp placement frame, 2-connection structure, 3-first clamp, 4-second clamp, 5-compression block, 6-compression block, 7-lower support arm, 8-upper support arm, 9-top connection block, 10-lead screw, 11-adjusting nut, 12-groove, 13-flange plate, 14-threaded hole, 15-threaded counter bore, 16-cushion block, 17-installation block, 18-bolt, 19-square block.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
The embodiment of the invention comprises the following steps: a clamp for a steel-plastic geogrid tensile test is disclosed, as shown in attached figures 1-9, and comprises 2 clamp placing frames 1 which are identical in structure and are oppositely arranged, a connecting structure 2 is arranged on an outer side plate of each clamp placing frame 1, the inner side surface of each clamp placing frame 1 is of an open structure, a first clamp 3 and a second clamp 4 are sequentially placed inside each clamp placing frame 1 from inside to outside, the first clamp 3 and the second clamp 4 are similar in structure and respectively comprise a pressure block 5 fixed at the bottom in the clamp placing frame 1, a pressure applying component is arranged above each pressure block 5 and comprises a pressure applying block 6 positioned at the bottommost part, 2 lower supporting arms 7 are symmetrically and rotatably arranged at the tops of the pressure applying blocks 6, the other end of each lower supporting arm 7 is hinged with one end of 1 upper supporting arm 8, the other end of each upper supporting arm 8 is rotatably connected with a top connecting block 9, the hinged end of 2 upper and lower support arms rotates through 1 hinge post and connects, has penetrated 1 lead screw 10 in the hinge post, and 1 adjusting nut 11 has been cup jointed to the one end screw thread that lead screw 10 one side was located the hinge post outside. The first clamp 3 and the second clamp 4 are different in that: the pressing surfaces of the pressure block 5 and the pressure block 6 of the first clamp 3 are both flat surfaces, and the pressing surfaces of the pressure block 5 and the pressure block 6 of the second clamp 4 are uniformly provided with a plurality of grooves 12.
In the process of carrying out a tensile test on the geogrid, plastics at two ends of the steel-plastic geogrid are stripped by a small length, steel wires are exposed, and the stripped plastics are discarded. The geogrid is extended into the jig placing frame 1 from the corresponding inner side face of the jig placing frame 1. Each of the stripped steel wires at the two ends is respectively placed in the groove 12 of the pressure block 5 of the second clamp 4. The lead screw 10 on the pressing component of the second clamp 4 is rotated, the lead screw 10 and the adjusting nut 11 jointly extrude the hinged ends of the upper support arm and the lower support arm, so that the upper support arm 8 and the lower support arm 7 respectively rotate, when the top of the top connecting block 9 is in contact with the inner top wall of the clamp placing frame 1, the rotation of the upper support arm 8 and the lower support arm 7 can only drive the pressing block 6 to move downwards, and the steel wire is clamped tightly through the pressing block 6 and the pressed block 5. In a similar way, in the process of placing the steel wire in the groove 12, the complete steel-plastic geogrid is placed on the compression block 5 of the first clamp 3, and the pressing component of the first clamp 3 is adjusted according to the adjusting mode of the second clamp 4, so that the pressing block 6 and the compression block 5 of the first clamp 3 jointly act to tighten the plastic-soil engineering grid.
After the two ends of the steel-plastic geogrid are clamped by the clamps, one clamp placing frame 1 is fixed on the tensile test pedestal, the other clamp placing frame 1 is connected with the stretcher through the connecting structure 2 at the back of the other clamp placing frame 1, and the steel-plastic geogrid can be subjected to tensile test through the action of the stretcher.
The thickness of the compression block 5 of the first clamp 3 is smaller than that of the compression block 5 of the second clamp 4. Since the second clamp 4 is used only for clamping the wire and the first clamp 3 is used for clamping the wire and the plastic-like material surrounding the wire. The steel wire is horizontally placed on the compression block 5 of the second clamp 4, the bottom surface of the steel-plastic geogrid is just horizontally placed on the compression block 5 of the first clamp 3, and the steel-plastic geogrid clamped by the two clamps is guaranteed to be kept on the same stress surface as much as possible in the tension process without other deformation.
The bottom of the pressure block 5 of the first clamp 3 is provided with a cushion block 16, the distance between a steel wire and the bottom surface of the steel-plastic geogrid is different in the steel-plastic geogrids of different models, and the height of the pressure block 5 can be adjusted by arranging the cushion blocks 16 of different quantities at the bottom of the pressure block 5 of the first clamp 3 so as to adapt to clamping of the steel-plastic geogrids of different models.
The front side and the rear side of the clamp placing frame 1 are both of an open structure, and the steel-plastic geogrid and the rotary screw rod 10 are convenient to operate in the placing process.
The front side and the rear side of the bottom of the clamp placing frame 1 are provided with flange plates 13 extending outwards, and threaded holes 14 are formed in the flange plates 13. Because 2 used anchor clamps in the tensile test process place in the frame 1, have 1 to fix on the test bench seat, for the convenience of anchor clamps place the fixed of frame 1, so be provided with flange board 13, the screw can place frame 1 with anchor clamps and fix on the test bench seat after passing screw hole 14 on flange board 13.
Threaded counter bores 15 are formed in the front side and the rear side of the compression block 5, and the compression block 5 is fixedly connected with the clamp placing frame 1 through screws. This facilitates the fixing, removal and replacement of the compression block 5. The threaded counter bore 15 can ensure that the top surface of the screw for fixing the pressure block 5 is lower than the surface height of the pressure block 5.
Top connecting block 9 and the interior roof fixed connection of frame 1 is placed to anchor clamps, avoids steel to mould geogrid to place in-process first anchor clamps 3 and second anchor clamps 4 and takes place to empty. In the process of clamping the steel wire and the steel-plastic geogrid, the clamp can move upwards integrally after the pressing blocks 6 of the 2 clamps are lifted upwards, and the steel-plastic geogrid is convenient to put in.
The top of the top connecting block 9 is fixedly connected with an installation block 17, and the installation block 17 is fixedly connected with the top of the clamp placing frame 1 through a bolt 18. This facilitates the mounting, dismounting and replacement of the upper pressing member.
The upper supporting arm 8 and the lower supporting arm 7 are connected through a pin shaft, a square block 19 is arranged on the pin shaft, a screw rod penetrating hole is formed in the square block 19, and an adjusting nut 11 is arranged on a screw rod 10 on the outer side of the square block 19. The upper support arm 8 and the lower support 7 are driven to deflect by rotating the screw rod 10. After the adjusting nut 11 is screwed down, the surface of the adjusting nut is in surface contact with the square block 19, so that the locking force of the adjusting nut is improved, and the clamp is prevented from loosening. And because set up the lead screw and wear the hole on the round pin axle, can reduce the intensity of round pin axle, and set up this square 19 and can increase the round pin axle volume, the intensity of reinforcement round pin axle.
Claims (9)
1. The utility model provides an anchor clamps for steel is moulded geogrid tensile test which characterized in that: comprises 2 clamp placing frames (1) which are same in structure and oppositely arranged, a connecting structure (2) is arranged on an outer side plate of each clamp placing frame (1), the inner side surface of each clamp placing frame (1) is of an open structure, a first clamp (3) and a second clamp (4) are sequentially placed inside each clamp placing frame (1) from inside to outside, the first clamp (3) and the second clamp (4) are similar in structure and respectively comprise a pressure block (5) fixed at the bottom in each clamp placing frame (1), a pressure applying component is arranged above each pressure block (5), each pressure applying component comprises a pressure applying block (6) positioned at the bottommost part, 2 lower supporting arms (7) are symmetrically arranged at the tops of the pressure applying blocks (6) in a rotating manner, the other end of each lower supporting arm (7) is hinged with one end of 1 upper supporting arm (8), the other end of each upper supporting arm (8) is rotatably connected with a top connecting block (9), 1 lead screw (10) penetrates between the connecting ends of the 2 upper and lower supporting arms, an adjusting nut (11) is arranged at one end of the lead screw (10), the compression surfaces of the compression block (5) and the pressure block (6) of the first clamp (3) are planes, and the compression surfaces of the compression block (5) and the pressure block (6) of the second clamp (4) are uniformly provided with a plurality of grooves (12).
2. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: the thickness of the compression block (5) of the first clamp (3) is smaller than that of the compression block (5) of the second clamp (4).
3. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: the front side and the rear side of the clamp placing frame (1) are both of an open structure.
4. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: the front side and the rear side of the bottom of the clamp placing frame (1) are provided with flange plates (13) extending outwards, and threaded holes (14) are formed in the flange plates (13).
5. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: the front side and the rear side of the compression block (5) are provided with threaded counter bores (15), and the compression block (5) is fixedly connected with the clamp placing frame (1) through screws.
6. The clamp for the steel-plastic geogrid tensile test according to claim 2, characterized in that: and a cushion block (16) is arranged at the bottom of the compression block (5) of the first clamp (3).
7. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: and the top connecting block (9) is fixedly connected with the inner top wall of the clamp placing frame (1).
8. The clamp for the steel-plastic geogrid tensile test according to claim 7, wherein: the top of top connecting block (9) is fixedly connected with installation block (17), and installation block (17) is through bolt (18) and the top fixed connection of anchor clamps placement frame (1).
9. The clamp for the steel-plastic geogrid tensile test according to claim 1, characterized in that: the upper supporting arm (8) and the lower supporting arm (7) are connected through a pin shaft, a square block (19) is arranged on the pin shaft, a screw rod penetrating hole is formed in the square block (19), and an adjusting nut (11) is arranged on a screw rod (10) on the outer side of the square block (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449270.2A CN112683660B (en) | 2020-12-09 | 2020-12-09 | Clamp for steel-plastic geogrid tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011449270.2A CN112683660B (en) | 2020-12-09 | 2020-12-09 | Clamp for steel-plastic geogrid tensile test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112683660A true CN112683660A (en) | 2021-04-20 |
| CN112683660B CN112683660B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011449270.2A Active CN112683660B (en) | 2020-12-09 | 2020-12-09 | Clamp for steel-plastic geogrid tensile test |
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| Country | Link |
|---|---|
| CN (1) | CN112683660B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005232682A (en) * | 2004-02-17 | 2005-09-02 | Mitsui Kagaku Sanshi Kk | Tensile tool for netted body |
| CN203490130U (en) * | 2013-10-17 | 2014-03-19 | 山东克斯特消毒科技股份有限公司 | Carton compression resistance tester |
| CN103969115A (en) * | 2014-04-18 | 2014-08-06 | 张家港市胜达钢绳有限公司 | Detection fixture for tensile testing of steel wires |
| CN207007616U (en) * | 2017-08-04 | 2018-02-13 | 浙江大玮检测科技有限公司 | A kind of fixture of GSZ tensile strength test |
| CN207662722U (en) * | 2018-01-05 | 2018-07-27 | 北京碧波立业技术检测有限公司 | A kind of ecology TGXG tensile test fixture |
| CN211401928U (en) * | 2020-07-30 | 2020-09-01 | 山东小土环境科技有限公司 | Geogrid tensile test anchor clamps and applied tensile test equipment of this anchor clamps |
| CN211717959U (en) * | 2019-12-25 | 2020-10-20 | 镇江市锶达合金材料有限公司 | Tensile test fixture device suitable for aluminum matrix composite |
-
2020
- 2020-12-09 CN CN202011449270.2A patent/CN112683660B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005232682A (en) * | 2004-02-17 | 2005-09-02 | Mitsui Kagaku Sanshi Kk | Tensile tool for netted body |
| CN203490130U (en) * | 2013-10-17 | 2014-03-19 | 山东克斯特消毒科技股份有限公司 | Carton compression resistance tester |
| CN103969115A (en) * | 2014-04-18 | 2014-08-06 | 张家港市胜达钢绳有限公司 | Detection fixture for tensile testing of steel wires |
| CN207007616U (en) * | 2017-08-04 | 2018-02-13 | 浙江大玮检测科技有限公司 | A kind of fixture of GSZ tensile strength test |
| CN207662722U (en) * | 2018-01-05 | 2018-07-27 | 北京碧波立业技术检测有限公司 | A kind of ecology TGXG tensile test fixture |
| CN211717959U (en) * | 2019-12-25 | 2020-10-20 | 镇江市锶达合金材料有限公司 | Tensile test fixture device suitable for aluminum matrix composite |
| CN211401928U (en) * | 2020-07-30 | 2020-09-01 | 山东小土环境科技有限公司 | Geogrid tensile test anchor clamps and applied tensile test equipment of this anchor clamps |
Non-Patent Citations (1)
| Title |
|---|
| 戚晶磊;: "钢塑土工格栅拉伸强度测试中夹持方法的研究", 中国水运, no. 07, pages 168 - 170 * |
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| CN112683660B (en) | 2023-09-26 |
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Inventor after: Qin Yucan Inventor after: Rao Junying Inventor after: Xi Zuowei Inventor after: Kong Deyu Inventor after: Xue Yanghao Inventor after: Peng Xing Inventor after: Zhao Changjie Inventor after: Wang Yaqi Inventor before: Rao Junying Inventor before: Xi Zuowei Inventor before: Kong Deyu Inventor before: Xue Yanghao Inventor before: Peng Xing Inventor before: Zhao Changjie Inventor before: Wang Yaqi |
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