CN201273030Y

CN201273030Y - Portable steel stranded wire clamper

Info

Publication number: CN201273030Y
Application number: CNU2008201590468U
Authority: CN
Inventors: 廖宏; 李世秋; 廖细雄; 孙鑫鹏; 陈迎春; 伍灿良; 陈建宇; 李欣; 伍森智; 颜阳
Original assignee: Hunan No6 Engineering Co Ltd
Current assignee: Hunan No6 Engineering Co Ltd
Priority date: 2008-11-05
Filing date: 2008-11-05
Publication date: 2009-07-15
Anticipated expiration: 2018-11-05

Abstract

A portable steel strand clamp comprises a wedge anchor table (1) and an anchor ring (2) of circular cone form which is composed of two half anchor rings, wherein when in use, the anchor ring (2) clamps a steel strand (3) to be arranged in a corresponding circular cone inner hole (4) of the wedge anchor table (1); the height (alpha) of the anchor ring (2) made from rigid alloy is lower than the height (b) of the wedge anchor table (1) made from rigid alloy; the equivalent friction angle (beta) of the circular cone inner hole (4) of the wedge anchor table (1) is 7.5 to 8.5 degrees; the inner hole (5) of the anchor ring (2) for clamping the steel strand (3) is a cylinder strength hole, with convex patters (6) on the hole wall. The portable steel strand clamp is adaptive to the conditions that the effectively section of steel strand is reduced and the steel strand has bite marks; the anchor ring can be detached and exchange easily; the portable steel strand clamp has good clamp property, anchoring and releasing property, high durability, and simple operation.

Description

Portable steel strand anchor clamps

Technical field

The utility model relates to field engineering or testing machine stretch-draw steel strand anchor clamps in the building operations, belongs to steel strand anchoring field.

Background technology

In the existing steel strand extension test test, there is following problem in ordinary steel twisted wire anchor clamps: (1) anchor clamps volume, weight are bigger, easy stripped thread, fracture of wire when stretch-draw; (2) contact surface of the flank of tooth of anchor clamps and steel strand is limited, and is the tangent line contact; (3) profile of tooth of plain clamp is excessive, the spacing 3mm of tooth and tooth-5mm, and sharp-pointed degree deficiency, 80 °-90 ° of profile of tooth angles, tooth depth 2mm-3mm is difficult to the steel strand of nipping, and based on this reason, causes plain clamp to be difficult to the folder steel strand; (4) notch sensitivity is big, and the position that crushes, scar place can produce stress and concentrate, and test specimen can break in advance in herein, thereby, influenced the success rate and the degree of accuracy of test of elongation rate; (5) except that above defective, existing other anchor clamps change, clamping is anti-skidding, steel strand stretch out and still have certain problem aspect the segment length control.

The utility model content

The technical problems to be solved in the utility model is, defective at prior art exists designs a kind of portable steel strand anchor clamps, has good gripping performance, loose anchor performance, higher durability, flexible adjustment of steel strand and anchor ring change conveniently the characteristics of simple operation.

The technical solution of the utility model is, described portable steel strand anchor clamps comprise wedge shape anchor platform and the truncated cone anchor ring that is combined into by two and half sheet anchor rings, and described anchor ring clamping steel strand in use is placed in the corresponding truncated cone endoporus of wedge shape anchor platform; Its design feature is, the height a of the anchor ring made from carbide alloy is less than the height b of the wedge shape anchor platform made from carbide alloy; The equivalent friction angle β of the tapered bore of described wedge shape anchor platform is 7.5 °-8.5 °, and described anchor ring is that cylindrical straight hole and hole wall are provided with burr in order to the endoporus of clamping steel strand.

Below the utility model made further specify.

Referring to Fig. 1 to Fig. 3, portable steel strand anchor clamps described in the utility model comprise wedge shape anchor platform 1 and the truncated cone anchor ring 2 (referring to Fig. 4 to Fig. 6) that is combined into by two and half sheet anchor rings, and described anchor ring 2 clamping steel strand 3 in use is placed in the corresponding truncated cone endoporus 4 of wedge shape anchor platform 1; Its design feature is, the height a of the anchor ring made from carbide alloy 2 is less than the height b of the wedge shape anchor platform made from carbide alloy 1; As Fig. 2, the equivalent friction angle β of the truncated cone endoporus 4 of described wedge shape anchor platform 1 is 7.5 °-8.5 °, and described anchor ring 2 is provided with burr 6 in order to the endoporus 5 of clamping steel strand 3 for cylindrical straight hole and hole wall.

As Fig. 4, also can make two and half sheet anchor rings involutory better at the one or both ends of described anchor ring 2 tie wire 7.

Know-why of the present utility model is, the taper type hole by described wedge shape anchor platform during anchoring puts on the powerful internal pressure of anchor ring, and steel strand radially are pressed into anchor ring and obtain enough big resistances.Wedge shape anchor platform can be adjusted at position in the stretch-draw jack draw-in groove according to the steel strand extension elongation.Usually, clip material and anchor ring material are having under the lubricated situation, its confficient of static friction f=0.12, equivalent friction angle β=6.8 °; In the utility model, anchor clamps can be from pine greater than equivalent friction angle the time to consider the wedge shape anchor platform angle of wedge, therefore the equivalent friction angle β that determines the truncated cone endoporus 4 of wedge shape anchor platform 1 is 7.5 °-8.5 °, and this angle has been tested and shown, can automatic loose anchor.

These anchor clamps can carry out on common LYWJ2-100t universal testing machine, thereby have widened the function of use of the omnipotent machine of LYWJ2-100t; Can make test method more near the anchorage style of steel strand in the engineering reality, promptly it has found a more reasonable test methods for the tension test of steel strand; On the basis of this sleeve clamp, need only and change the test that individual part can be finished other gauge steel twisted wire; Problems such as the net sectional area that can adapt to steel strand reduces, bite mark.

As known from the above, the utility model is a kind of portable steel strand anchor clamps, its anchor ring is conveniently replaced, have good gripping performance, loose anchor performance and durability, simple operation, cost is lower, it is for expanding the detectability of test room, popularize the Building technology of prestressed reinforced concrete, energy-saving and cost-reducing for construction work, guarantee that construction engineering quality provides advantage.

Description of drawings

Fig. 1 is the application state sectional structure schematic diagram of the utility model-kind of embodiment;

Fig. 2 is the sectional structure schematic diagram of anchor platform shown in Figure 1, and wherein b is a wedge shape anchor platform height;

Fig. 3 is that A shown in Figure 2 is to view;

Fig. 4 is the main TV structure schematic diagram of anchor ring among Fig. 1, and wherein a is the height of anchor ring;

Fig. 5 be among Fig. 4 B to view;

Fig. 6 be among Fig. 5 C-C to sectional structure chart.

In the drawings:

1-wedge shape anchor platform, 2-anchor ring, 3-steel strand,

4-truncated cone endoporus, 5-endoporus, 6-burr,

7-steel wire.

The specific embodiment

Extremely shown in Figure 6 as Fig. 1, portable steel strand anchor clamps described in the utility model comprise wedge shape anchor platform 1 and the truncated cone anchor ring 2 that is combined into by two and half sheet anchor rings, and described anchor ring 2 clamping steel strand 3 in use is placed in the corresponding truncated cone endoporus 4 of wedge shape anchor platform 1; Its design feature is, the height a of the anchor ring made from carbide alloy 2 is less than the height b of the wedge shape anchor platform made from carbide alloy 1; As Fig. 2, the equivalent friction angle β of the truncated cone endoporus 4 of described wedge shape anchor platform 1 is 7.5 °, and described anchor ring 2 is provided with the burr 6 of annular for cylindrical straight hole and hole wall in order to the endoporus 5 of clamping steel strand 3.

Wedge shape anchor platform 1 profile size design is the trapezoidal draw-in groove that is slightly less than special-purpose stretch-draw jack; Less port diameter=the 20mm of the truncated cone endoporus 4 of wedge shape anchor platform 1 is than large port diameter=30mm; Anchor ring 2 is than small end diameter=16mm, wall thickness 1mm, and than outside diameter=26mm, wall thickness 5mm, the diameter=14mm of endoporus 5.Anchor ring can be adjusted extrusion position according to the steel strand diameter in the truncated cone endoporus 4 of wedge shape anchor platform 1.

Claims

1, a kind of portable steel strand anchor clamps comprise wedge shape anchor platform (1) and the truncated cone anchor ring (2) that is combined into by two and half sheet anchor rings, and described anchor ring (2) clamping steel strand (3) in use is placed in the corresponding truncated cone endoporus (4) of wedge shape anchor platform (1); It is characterized in that the height (a) of the anchor ring made from carbide alloy (2) is less than the height (b) of the wedge shape anchor platform made from carbide alloy (1), the equivalent friction angle (β) of the truncated cone endoporus (4) of described wedge shape anchor platform (1) is 7.5 ⁰-8.5 ⁰, described anchor ring (2) is provided with burr (6) in order to the endoporus (5) of clamping steel strand (3) for cylindrical straight hole and hole wall.

2, according to the described portable steel strand of claim 1 anchor clamps, it is characterized in that, at the one or both ends tie wire (7) of described anchor ring (2).