CN112683660B - Clamp for steel-plastic geogrid tensile test - Google Patents
Clamp for steel-plastic geogrid tensile test Download PDFInfo
- Publication number
- CN112683660B CN112683660B CN202011449270.2A CN202011449270A CN112683660B CN 112683660 B CN112683660 B CN 112683660B CN 202011449270 A CN202011449270 A CN 202011449270A CN 112683660 B CN112683660 B CN 112683660B
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- clamp
- block
- steel
- placing frame
- pressure applying
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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 27
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 17
- 239000010959 steel Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 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 3
- -1 Polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000012752 auxiliary agent Substances 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
- 210000001624 hip Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- 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 compression block fixed at the inner bottom of the clamp placing frame, a compression block is arranged above the compression block, 2 lower supporting arms are symmetrically arranged at the top of the compression block in a rotating mode, 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 screw rod penetrates between the connecting ends of the 2 upper supporting arms and the connecting ends of the lower supporting arms, one end of each screw rod is provided with an adjusting nut, the compression block of the first clamp and the compression block are plane, and a plurality of grooves are uniformly formed in the compression block of the second clamp and the compression block. The clamp can clamp the steel-plastic geogrid completely, 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) by special treatment of high-strength steel wires (or other fibers), and other auxiliary agents are added, so that the composite high-strength tensile strip is formed by an extrusion process. The steel-plastic geogrid can be applied to the fields of reinforcing soft soil foundations such as highways, railways, bridge decks, approach roads, wharfs, dams, slag yards and the like, retaining walls, pavement crack-resistant engineering and the like, and therefore the steel-plastic geogrid needs to have certain tensile strength.
When the steel-plastic geogrid tensile test is performed, because the steel wires are different from the outer wrapping materials, under the clamping of the traditional clamp, the conditions that the steel wires and the plastic are asynchronous in tension process, the steel-plastic geogrid falls off from the clamp, the plastic is clamped bad and the like can occur in the tensile process, and the tensile strength, the elongation and the like of the steel-plastic geogrid can not 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 experiments.
The technical scheme of the invention is as follows: the utility model provides a anchor clamps for steel-plastic geogrid tensile test, including 2 anchor clamps that the structure is the same, and set up in opposite directions place the frame, be provided with connection structure on the anchor clamps frame lateral plate, the medial surface that the frame was placed to the anchor clamps is open structure, first anchor clamps and second anchor clamps have been placed in proper order to inside by inside to outside to every anchor clamps place the frame, first anchor clamps and second anchor clamps structure are similar, all include the pressurized piece of fixing in the anchor clamps place the frame bottom, pressurized piece top is for the component that applies pressure, pressurized piece top symmetry rotation is equipped with 2 lower support arms, every lower support arm other end is articulated with 1 last support arm one end, the other end and the top connecting block rotation of going up the support arm are connected, penetrate 1 lead screw between 2 upper and lower support arms, lead screw one end is provided with adjusting nut, wherein the pressurized piece of first anchor clamps is the plane by pressurized piece and pressurized piece, pressurized piece of second anchor clamps is pressed piece and pressurized piece's pressurized piece evenly is provided with a plurality of recesses.
In the clamp for the steel-plastic geogrid tensile test, the thickness of the pressed block of the first clamp is smaller than that of the pressed block of the second clamp.
In the clamp for the tensile test of the steel-plastic geogrid, the front side and the rear side of the clamp placement frame are both of an open structure.
In the fixture for the steel-plastic geogrid tensile test, the front side and the rear side of the bottom of the frame placed by the fixture are provided with the flange plates which extend outwards, and the flange plates are provided with the threaded holes.
In the clamp for the tensile test of the steel-plastic geogrid, the front side and the rear side of the compression block are provided with the threaded counter bores, and the compression block is fixedly connected with the clamp placement frame through screws.
In the clamp for the steel-plastic geogrid tensile test, a cushion block is arranged at the bottom of the pressed block of the first clamp.
In the clamp for the steel-plastic geogrid tensile test, the top connecting block is fixedly connected with the inner top wall of the clamp placement frame.
In the clamp for the steel-plastic geogrid tensile test, the top of the top connecting block is fixedly connected with the mounting block, and the mounting block is fixedly connected with the top of the clamp placement frame through bolts.
In the clamp for the steel-plastic geogrid tensile test, the upper supporting arm and the lower supporting arm are connected through the pin shaft, the square block is arranged on the pin shaft, the screw rod penetrating hole is formed in the square block, and the adjusting nut is arranged on the screw rod outside the square block.
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 wrapping the plastic material of the steel wire. The pressing blocks and the pressed blocks of the two clamps are clamped and separated through the pressing members. The pressing component is manufactured based on the geometric principle that two waists of an isosceles triangle are unchanged and the height of the isosceles triangle is adjusted by stretching the pressing block, and the length of the bottom edge of the isosceles triangle is adjusted by a screw rod and a nut. The extrusion face of the second clamp pressed block is provided with a plurality of grooves which are parallel to the tensile steel wire of the steel-plastic geogrid and have oval sections, and the grooves increase the contact area and friction force between the extrusion face and the steel wire, so that the steel wire is further clamped. The invention solves the problem that the clamp is difficult to clamp the geogrid in the tensile test of the steel-plastic geogrid, and has the characteristics of simple operation and ensuring the validity 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 elevational view of a second clamp;
FIG. 5 is a view showing the state of use of the present invention;
FIG. 6 is a schematic top view of the clip placement frame;
FIG. 7 is a schematic diagram of a pressed block structure of the second clamp;
FIG. 8 is a schematic diagram of the mating structure of the adjusting nut and square block;
FIG. 9 is a schematic structural view of the whole set of tensile test apparatus.
Reference numerals: the fixture comprises a 1-fixture placement frame, a 2-connection structure, a 3-first fixture, a 4-second fixture, a 5-pressed block, a 6-pressed block, a 7-lower support arm, an 8-upper support arm, a 9-top connection block, a 10-screw rod, an 11-adjusting nut, a 12-groove, a 13-flange plate, a 14-threaded hole, a 15-threaded counter bore, a 16-cushion block, a 17-installation block, an 18-bolt and a 19-square block.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not intended to be limiting.
Embodiments of the invention: the utility model provides a anchor clamps for steel-plastic geogrid tensile test, as shown in fig. 1-9, including 2 anchor clamps place the frame 1 that the structure is the same, and set up in opposite directions, be provided with connection structure 2 on the outer panel of every anchor clamps place the frame 1, the medial surface that the frame 1 was placed to the anchor clamps is open structure, first anchor clamps 3 and second anchor clamps 4 have been placed in proper order from inside to outside to inside in every anchor clamps place the frame 1, first anchor clamps 3 and second anchor clamps 4 are similar in structure, all including the pressurized piece 5 of fixing in the frame 1 is placed to the anchor clamps, pressurized piece 5 top is for the component that applies pressure, the component that applies pressure is including being located the pressurized piece 6 of bottommost, the symmetrical rotation in pressurized piece 6 top is equipped with 2 lower support arm 7, the other end of every lower support arm 7 is articulated with 1 last support arm 8 one end, the other end and top connecting block 9 rotation connection of last support arm 8, the articulated end of 2 upper and lower support arm is rotated through 1 articulated post and is connected, penetrating 1 lead screw 10 in the articulated post, the screw thread that one side is located the articulated post outside has cup jointed 1 adjusting nut 11. The first clamp 3 and the second clamp 4 are different in that: the pressing surfaces of the pressed block 5 and the pressing block 6 of the first clamp 3 are flat, and the pressing surfaces of the pressed block 5 and the pressing block 6 of the second clamp 4 are uniformly provided with a plurality of grooves 12.
In the tensile test process of the geogrid, the plastic at the two ends of the steel-plastic geogrid is stripped by a small length, the steel wires are exposed, and the stripped plastic is 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 two stripped-off wires is placed in a groove 12 of the pressed block 5 of the second clamp 4, respectively. The screw rod 10 on the pressing member of the second clamp 4 is rotated, the screw rod 10 and the adjusting nut 11 jointly squeeze the hinged ends of the upper and lower support arms, so that the upper support arm 8 and the lower support arm 7 rotate respectively, and when the top of the top connecting block 9 contacts 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 only drives the pressing block 6 to move downwards, so that the steel wire is clamped by the pressing block 6 and the pressed block 5. In the same way, in the process of placing the steel wire in the groove 12, the complete steel-plastic geogrid is placed on the pressed block 5 of the first clamp 3, and the pressing member 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 pressed block 5 of the first clamp 3 jointly act to fasten the plastic geogrid.
After both ends of the steel-plastic geogrid are clamped by the clamps, one clamp placing frame 1 is fixed on a tensile test pedestal, and the other clamp placing frame 1 is connected with a stretcher through a connecting structure 2 at the back of the clamp placing frame, so that the steel-plastic geogrid can be subjected to tensile test through action of the stretcher.
The thickness of the pressed block 5 of the first clamp 3 is smaller than that of the pressed block 5 of the second clamp 4. Since the second clamp 4 is only used for clamping the wire, whereas the first clamp 3 is used for clamping the wire and wrapping the plastic-like material of the wire. The arrangement is to enable the bottom surface of the steel-plastic geogrid to be just horizontally placed on the pressed block 5 of the first clamp 3 when the steel wire is horizontally placed on the pressed block 5 of the second clamp 4, so that the steel-plastic geogrid clamped by the two clamps is kept on the same stress surface as much as possible in the tensioning process without other deformation.
The bottom of the pressed block 5 of the first clamp 3 is provided with a cushion block 16, the heights of steel wires in the steel-plastic geogrids of different types from the bottom surface of the steel-plastic geogrid are different, and at the moment, the heights of the pressed block 5 can be adjusted by arranging different numbers of cushion blocks 16 at the bottom of the pressed block 5 of the first clamp 3 so as to adapt to the steel-plastic geogrids of different types.
The front side and the rear side of the clamp placement frame 1 are both of an open structure, and the operation is convenient in the process of placing the steel-plastic geogrid and rotating the screw rod 10.
The front side and the rear side of the bottom of the fixture placement frame 1 are provided with flange plates 13 which extend outwards, and threaded holes 14 are formed in the flange plates 13. Because in the 2 anchor clamps that are used in tensile test process place frame 1, have 1 to fix on the test pedestal, in order to make things convenient for anchor clamps to place the fixed of frame 1, so be provided with flange 13, the screw passes behind the screw hole 14 on the flange 13 can be with anchor clamps place frame 1 and fix on the test pedestal.
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. Thus facilitating the fixing, dismounting and replacement of the pressed block 5. The threaded counter bore 15 ensures that the top surface of the screw fixing the pressed block 5 is lower than the surface of the pressed block 5.
The top connecting block 9 is fixedly connected with the inner top wall of the clamp placement frame 1, and the first clamp 3 and the second clamp 4 are prevented from toppling in the steel-plastic geogrid placement process. Simultaneously, in the process of clamping the steel wires and the steel-plastic geogrid, after the pressing blocks 6 of the 2 clamps are lifted upwards, the clamps can move upwards integrally, and the steel-plastic geogrid is conveniently placed in the steel-plastic geogrid.
The top of the top connecting block 9 is fixedly connected with a mounting block 17, and the mounting block 17 is fixedly connected with the top of the clamp placing frame 1 through a bolt 18. This facilitates the installation, removal and replacement of the upper pressing member.
The upper support arm 8 and the lower support 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 outside the square block 19. The rotating screw rod 10 drives the upper support arm 8 and the lower support arm 7 to deflect. After the adjusting nut 11 is screwed down, the surface of the adjusting nut is in contact with the surface of the square block 19, so that the locking force of the adjusting nut is improved, and the clamp is prevented from loosening. And because the screw rod penetrating holes are formed in the pin shaft, the strength of the pin shaft is reduced, and the square block 19 is arranged to increase the volume of the pin shaft and strengthen the strength of the pin shaft.
Claims (4)
1. A anchor clamps for steel-plastic geogrid tensile test, its characterized in that: the clamp comprises 2 clamp placing frames (1) which are identical in structure and are oppositely arranged, wherein a connecting structure (2) is arranged on the outer side plate of the 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 arranged inside each clamp placing frame (1) from inside to outside, the structures of the first clamp (3) and the second clamp (4) comprise pressure blocks (5) fixed at the inner bottom of the clamp placing frame (1), a pressure applying member is arranged above the pressure blocks (5), the pressure applying member comprises pressure applying blocks (6) positioned at the bottommost part, 2 lower supporting arms (7) are symmetrically arranged at the top of the pressure applying blocks (6) in a rotating mode, the other end of each lower supporting arm (7) is hinged with one end of each upper supporting arm (8), the other end of each upper supporting arm (8) is in rotating connection with a top connecting block (9), 1 screw rod (10) penetrates between the connecting ends of the 2 upper supporting arms and the lower supporting arms, one end of each screw rod (10) is provided with an adjusting nut (11), the pressure applying blocks (5) and the pressure applying surfaces (6) of the first clamp (3) are uniformly provided with pressure applying blocks (6) on the pressure applying surfaces of the pressure applying blocks (6) and the pressure applying surfaces (12) which are provided with pressure applying surfaces;
the thickness of the pressed block (5) of the first clamp (3) is smaller than that of the pressed block (5) of the second clamp (4), and a cushion block (16) is arranged at the bottom of the pressed block (5) of the first clamp (3);
screw thread 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;
the top connecting block (9) is fixedly connected with the inner top wall of the clamp placing frame (1), the top of the top connecting block (9) is fixedly connected with the mounting block (17), and the mounting block (17) is fixedly connected with the top of the clamp placing frame (1) through the bolt (18).
2. The clamp for steel-plastic geogrid tensile testing according to claim 1, wherein: the front side and the rear side of the clamp placing frame (1) are both open structures.
3. The clamp for steel-plastic geogrid tensile testing according to claim 1, wherein: the fixture placing frame is characterized in that flange plates (13) extending outwards are arranged on the front side and the rear side of the bottom of the fixture placing frame (1), and threaded holes (14) are formed in the flange plates (13).
4. The clamp for steel-plastic geogrid tensile testing according to claim 1, wherein: the upper support arm (8) and the lower support 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) at 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 CN112683660A (en) | 2021-04-20 |
| CN112683660B true CN112683660B (en) | 2023-09-26 |
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Family Applications (1)
| 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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112683660B (en) |
Citations (7)
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|---|---|---|---|---|
| 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 |
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| 钢塑土工格栅拉伸强度测试中夹持方法的研究;戚晶磊;;中国水运(第07期);168-170 * |
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| CN112683660A (en) | 2021-04-20 |
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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 |