CN211292320U - Clamping piece type anchorage for closed cable Z-shaped steel wire test - Google Patents
Clamping piece type anchorage for closed cable Z-shaped steel wire test Download PDFInfo
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- CN211292320U CN211292320U CN201922130183.XU CN201922130183U CN211292320U CN 211292320 U CN211292320 U CN 211292320U CN 201922130183 U CN201922130183 U CN 201922130183U CN 211292320 U CN211292320 U CN 211292320U
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- clamping piece
- steel wire
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- shaped steel
- cable
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Abstract
The utility model discloses a clamping piece type anchorage device for Z-shaped steel wire test of a closed cable, which comprises a plurality of clamping pieces and an anchor cup, wherein all the clamping pieces form a circular truncated cone-shaped clamping piece assembly after being cohered, and steel wire anchoring holes matched with the Z-shaped steel wire are formed inside the circular truncated cone-shaped clamping piece assembly; the anchor cup is fastened on the truncated cone-shaped clamping piece component in a matching manner, and a gap is arranged between the bottom of the anchor cup and the top of the truncated cone-shaped clamping piece component. The utility model discloses utilize the tapering of anchor cup and clamping piece, under the tensioning action, the clamping piece produces great frictional resistance to Z shaped steel silk, produces the interlock effect to reach the effect of anchor. The anchoring problem of the mechanical property test of the closed cable steel wire is solved, and the anchor has the advantages of simple structure, low cost, convenient use and repeated use. The method can promote the relevant research on the mechanical property of the closed cable, the test result can provide a basis for the design of the closed cable, provide a theoretical basis for the safety assessment and the life prediction of the closed cable, and promote the popularization and the application of the closed cable in engineering.
Description
Technical Field
The utility model belongs to prestressing force cable field, concretely relates to airtight cable Z type clip formula ground tackle for wire test.
Background
With the requirement of modern building structures and bridge structures for large space and large span, some space structures with prestressed guys gradually show the advantages of spanning space and structure efficiency, and are widely applied to various engineering fields, such as stadiums, traffic hubs, bridge public buildings and the like, with the advantages of light weight, attractive appearance, large overall rigidity, good structural performance and the like. The prestressed structure is usually characterized in that a high-strength inhaul cable is introduced into a common space structure, the distribution of internal force and deformation of the traditional structure is changed by applying prestress, and the internal force and deformation under the action of load are offset, so that the stress of the structure is improved, and the bearing capacity of the structure is improved. For prestressed constructions, the stay is the most critical and core component.
The closed cable is also called a sealed steel wire rope or a Z-shaped cable, is used as a cable material with outstanding mechanical property and good weather resistance, and is widely applied to the fields of petroleum, hoisting and bridges. In the aspect of construction, the closed cable is widely and generally applied to foreign building engineering. The production process of the closed cable is complex, the technical requirement is high, the application in the building engineering of China is less, and the closed cable is mainly applied to the bridge engineering or the hoisting and petroleum fields. With the development of building structures towards large-span and super high-rise directions and higher requirements on guy cables, the closed guy cables are used in the building engineering in China, such as Zhengzhou Olympic center, national speed slide center, copper Olympic center and the like, and the closed guy cable has wide application prospects.
At present, most of engineering applications only pay attention to the overall macroscopic basic properties of the closed cable, such as breaking force, elastic modulus, lay length and the like, wherein the breaking force and the elastic modulus are mostly estimated according to tests or other types of cables, and in fact, the overall mechanical properties of the cables depend on the mechanical properties of steel wires formed by the cables and the interaction among the steel wires. However, due to the special section form and steel wire type of the closed cable, other types of cables cannot be referred to, and therefore, research on systems of the special-shaped steel wire and the closed cable is needed. However, because the existing test equipment and clamp mainly aim at high-strength steel wires (round) or stay cables with relatively smooth outer surfaces, and a series of tests such as tensile strength, fatigue and the like cannot be carried out on special-shaped steel wires, an anchorage device for a Z-shaped steel wire test of a closed cable needs to be researched for carrying out a series of tests on special-shaped steel wires.
The closed cable is widely applied to bridge structures as a guy cable with high technological content and excellent performance, and is beginning to be applied to building structures. However, only the overall macroscopic mechanical properties of the closed cable are focused on in the current engineering, and in fact, the mechanical properties of the cable are determined by the mechanical properties of the steel wires and the interaction between the steel wires, so that systematic research on the steel wires constituting the closed cable is necessary, wherein the research includes the development of tensile and fatigue tests. However, since the Z-shaped steel wire has a complicated cross-sectional form unlike the circular steel wire, it is necessary to develop a new anchoring tool for the Z-shaped steel wire.
Disclosure of Invention
The utility model discloses a solve the technical problem that exists among the well-known technique and provide an airtight cable Z shaped steel silk is experimental with clip formula ground tackle for airtight cable Z shaped steel silk is tensile, fatigue test, in order to obtain the mechanical properties and the fatigue property of Z shaped steel silk.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a clamping piece type anchorage device for a Z-shaped steel wire test of a closed cable comprises a plurality of clamping pieces and an anchor cup, wherein all the clamping pieces are clasped to form a circular truncated cone-shaped clamping piece assembly, and a steel wire anchoring hole matched with the Z-shaped steel wire is formed in the circular truncated cone-shaped clamping piece assembly; the anchor cup is fastened on the circular truncated cone-shaped clamping piece component in a matching manner, and a gap is formed between the bottom of the anchor cup and the top of the circular truncated cone-shaped clamping piece component.
The upper part of the inner side of the clamping piece is provided with a wedge-shaped gap, and the wedge-shaped gap is filled with a rubber pad.
And threads are arranged at the middle lower part of the inner side of the clamping piece.
In the circular truncated cone-shaped clamping piece component, a gap is arranged between two adjacent clamping pieces.
The gap between two adjacent clamping pieces is 2-3 mm.
The outside of the anchor cup is cylindrical.
And threads are arranged outside the anchor cup.
The rubber pad is adhered to the clip.
The utility model has the advantages and positive effects that: by utilizing the conicity of the anchor cup and the clamping piece, under the tensioning action, the clamping piece generates larger friction resistance to the Z-shaped steel wire to generate the occlusion action, thereby achieving the anchoring action. The utility model provides an airtight cable steel wire mechanical properties test's anchor problem, and this ground tackle simple structure, with low costs, convenient to use and repeatedly usable. The utility model discloses a provide and can promote the relevant research of airtight cable mechanical properties, the test result can provide the basis for the design of airtight cable, for the safety assessment and the life-span prediction of airtight cable provide the theoretical foundation, promote the popularization and the application of airtight cable in the engineering.
Drawings
Fig. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is a schematic three-dimensional structure diagram of the circular truncated cone-shaped clip assembly of the present invention;
FIG. 4 is a schematic longitudinal section of FIG. 1;
fig. 5 is a top view of fig. 1.
In the figure: 1. a clip; 2. an anchor cup; 3. a rubber pad; 4. a thread; 5. and (6) steel wire anchoring holes.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
referring to fig. 1 to 5, the clamping piece type anchorage for the closed cable Z-shaped steel wire test comprises a plurality of clamping pieces 1 and an anchor cup 2, wherein all the clamping pieces 1 are clasped to form a circular truncated cone-shaped clamping piece assembly, and a steel wire anchoring hole 5 matched with the Z-shaped steel wire is formed in the circular truncated cone-shaped clamping piece assembly; the anchor cup 2 is fastened on the truncated cone-shaped clamping piece component in a matching mode, a gap is formed between the bottom of the anchor cup 2 and the top of the truncated cone-shaped clamping piece component, namely the top surface of the truncated cone-shaped clamping piece component is larger than the bottom surface of a taper hole in the anchor cup 2, on one hand, the Z-shaped steel wire can be sufficiently clamped, and on the other hand, the anchor can be conveniently disassembled and assembled to be reused. When the anchor is used, the truncated cone-shaped clamping piece assembly and the Z-shaped steel wire are fixed in the anchor cup by pushing the truncated cone-shaped clamping piece assembly, and the truncated cone-shaped clamping piece assembly is further plugged into the anchor cup 2 by applying a pulling force to the Z-shaped steel wire. The inside of the anchor cup is provided with a taper angle, the angle of the taper angle is consistent with that of the clamping piece, the outer side of the clamping piece is ensured to be matched with the inner side of the anchor cup, and the outer surface of the clamping piece is fully contacted with the inner surface of the anchor cup in the stretching process.
In this embodiment, the anchor described above is further modified by:
the upper part of the inner side of the clamping piece 1 is provided with a wedge-shaped notch, and the rubber pad 3 is filled in the wedge-shaped notch to prevent the stress concentration of the clamping port, and the middle part of the Z-shaped steel wire is broken before the clamping end in the mechanical property test process, so that the real mechanical property of the Z-shaped steel wire cannot be obtained. The rubber pad 3 and the clamping piece 1 can be adhered by toughened glue.
The middle lower part of the inner side of the clamping piece 1 is provided with threads 4 to enhance the friction force between the clamping piece 1 and the Z-shaped steel wire and prevent slippage in the test process.
In the circular truncated cone-shaped clamping piece component, a gap is arranged between two adjacent clamping pieces 1, preferably 2-3 mm. On the one hand, the clamping pieces are limited mutually to prevent the steel wire anchoring from being further clamped, on the other hand, reasonable gaps are formed to ensure that the steel wire anchoring device is also applicable to Z-shaped steel wires with smaller specifications, and the universality of the anchoring device is improved.
The anchor cup 2 is cylindrical, so that the testing machine can clamp the anchor conveniently, threads can be arranged on the outer surface of the anchor cup of the anchor according to test requirements and the specification of a clamp of the testing machine, and the anchor cup is connected with the testing machine through the threads.
In this embodiment, the number of the clips 1 is preferably 2 to 6, and 3 clips are preferably used.
The working principle of the utility model is as follows:
the Z-shaped steel wire is anchored in the steel wire anchoring hole 5, the truncated cone-shaped clamping piece assembly is plugged in the anchor cup 2, the truncated cone-shaped clamping piece assembly is fixed in the anchor cup by applying pushing force to the truncated cone-shaped clamping piece assembly, pulling force is applied to the Z-shaped steel wire in a preloading stage, the truncated cone-shaped clamping piece assembly and the steel wire can move towards the front end of the anchor cup 2 and move to a certain depth, the clamping piece is limited to move continuously due to the cone angle inside the anchor cup 2, pressure can be generated on the clamping piece due to the cone angle of the anchor cup, meanwhile, the clamping piece can generate extrusion force on the Z-shaped steel wire, and the friction force between the Z-shaped steel wire and the clamping piece is increased, so that the anchoring effect of the.
The utility model discloses the centre gripping of airtight cable Z type steel wire of mainly used. The utility model discloses form according to Z type steel wire constitutes steel wire anchor hole at clamping piece anchor center, under the tensile action, the clamping piece is to the inside removal of anchor cup, because there is the cone angle inside the anchor cup, prevents the clamping piece inwards to remove and to the clamping piece pressure production, and the clamping piece will do all can transmit to Z type steel wire, increases extrusion force and frictional force between steel wire and the clamping piece, forms the interlock, realizes the anchor of Z type steel wire.
Adopt the utility model discloses should pay attention to following several aspects:
firstly, the method comprises the following steps: the steel wire anchoring holes are used for fully considering the specification of the existing Z-shaped steel wire and realizing the universality of the anchorage device; secondly, the method comprises the following steps: because the rubber pad can take place permanent deformation under higher pressure, the rubber pad is consumption type material, should change often in the experiment, in the condition, every experiment configuration rubber pad as far as possible.
The utility model discloses an extrusion force and frictional force between clamping piece and the Z shaped steel silk realize the anchor of Z shaped steel silk. The wedge-shaped notch and the rubber pad are arranged at the upper part of the clamping piece, so that the stress concentration phenomenon of the clamping end is reduced; the Z-shaped steel wires with different specifications are anchored by arranging gaps between the clamping pieces; the bottom of the anchor cup 2 and the top of the cone-shaped clamping piece assembly are provided with a gap, so that the anchor is convenient to disassemble and assemble, and the repeated utilization is realized.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the scope of the present invention.
Claims (8)
1. A clamping piece type anchorage device for a Z-shaped steel wire test of a closed cable is characterized by comprising a plurality of clamping pieces and an anchor cup, wherein all the clamping pieces form a circular truncated cone-shaped clamping piece assembly after being clasped, and a steel wire anchoring hole matched with the Z-shaped steel wire is formed inside the circular truncated cone-shaped clamping piece assembly;
the anchor cup is fastened on the circular truncated cone-shaped clamping piece component in a matching manner, and a gap is formed between the bottom of the anchor cup and the top of the circular truncated cone-shaped clamping piece component.
2. The clamping piece type anchorage device for the closed cable Z-shaped steel wire test as claimed in claim 1, wherein a wedge-shaped notch is arranged at the upper part of the inner side of the clamping piece, and a rubber pad is filled in the wedge-shaped notch.
3. The closed-cable Z-shaped steel wire test clip type anchorage device according to claim 1 or 2, wherein threads are arranged at the middle lower part of the inner side of the clip.
4. The closed-cable Z-shaped steel wire test clip-type anchorage device according to claim 1, wherein a gap is formed between two adjacent clips in the circular truncated cone-shaped clip assembly.
5. The closed cable Z-shaped steel wire test clip type anchorage device according to claim 4, wherein a gap between two adjacent clips is 2-3 mm.
6. The closed-cable Z-shaped steel wire test clip-type anchorage device as claimed in claim 2, wherein the outside of the anchorage cup is cylindrical.
7. The closed-cable Z-shaped steel wire test clip-type anchorage device as claimed in claim 2, wherein threads are arranged on the outside of the anchorage cup.
8. The closed-cable Z-shaped steel wire test clip-type anchorage device as claimed in claim 2, wherein the rubber pad is adhered to the clip.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201922130183.XU CN211292320U (en) | 2019-11-30 | 2019-11-30 | Clamping piece type anchorage for closed cable Z-shaped steel wire test |
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CN201922130183.XU CN211292320U (en) | 2019-11-30 | 2019-11-30 | Clamping piece type anchorage for closed cable Z-shaped steel wire test |
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CN211292320U true CN211292320U (en) | 2020-08-18 |
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CN201922130183.XU Expired - Fee Related CN211292320U (en) | 2019-11-30 | 2019-11-30 | Clamping piece type anchorage for closed cable Z-shaped steel wire test |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110823686A (en) * | 2019-11-30 | 2020-02-21 | 天津大学 | Clamping piece type anchorage for closed cable Z-shaped steel wire test |
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2019
- 2019-11-30 CN CN201922130183.XU patent/CN211292320U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110823686A (en) * | 2019-11-30 | 2020-02-21 | 天津大学 | Clamping piece type anchorage for closed cable Z-shaped steel wire test |
CN110823686B (en) * | 2019-11-30 | 2024-08-09 | 天津大学 | Clamping piece type anchorage for Z-shaped steel wire test of closed cable |
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CF01 | Termination of patent right due to non-payment of annual fee | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200818 Termination date: 20211130 |