CN2620738Y

CN2620738Y - Clamping piece

Info

Publication number: CN2620738Y
Application number: CN 03241513
Authority: CN
Inventors: 赵克政; 吴志勇; 张继文; 吴坚
Original assignee: Liuzhou OVM Machinery Co Ltd
Current assignee: Liuzhou OVM Machinery Co Ltd
Priority date: 2003-03-21
Filing date: 2003-03-21
Publication date: 2004-06-16
Anticipated expiration: 2013-03-21

Abstract

The utility model provides a clamping piece, and relates to an anchorage device clamping piece of a pre-stressing force type anchorage device used for construction, two pieces or three pieces type. The utility model is characterized in that the inner teeth of a clamping piece are a double-layer thread, the thickness of the tooth type of each layer thread is different, a thread pitch can be same and also can be different, the thinner and shallower teeth are arranged on the surface of the tooth top scappled of thick teeth, and the thinner and shallower teeth are circular arc shaped. Because the structure of the clamping piece of the utility model is adopted, the contact area between the clamping piece and a FRP tendon or a string is increased, thus the friction force between the clamping piece and the FRP tendon or the string is increased and the pressure intensity the clamping piece exerted on the FRP tendon or the string is reduced, the phenomenon that the pull scar of the surface of the FRP tendon or the string results in the slipped screw can be avoided, but also crushing the FRP tendon or the string can be avoided, and the reliability of the anchoring is improved.

Description

Intermediate plate

Technical field

The utility model relates to the anchor clipper of a kind of building operations with the prestressing force strand tapered anchorage.

Background technology

The prestressed anchor of consumption maximum is the intermediate plate anchor in the market, and this ground tackle is made up of common prestress wire, anchor plate, anchor slab and intermediate plate; Development along with prestressing technique, set about research both at home and abroad and replaced common prestress wire with fibre reinforced composites (FRP) muscle or rope, because shearing resistance and the compressive strength of FRP are lower, as still continue to use existing the structure intermediate plate, will produce following deficiency: the one, the shear strength of FRP muscle or rope is lower, the intermediate plate thread form is thinner triangle, the intermediate plate tooth directly contacts with FRP muscle or rope, when stressed, may pull FRP muscle or rope surface, cause the stripped thread phenomenon; The 2nd, the compressive strength of FRP muscle or rope is lower, under powerful chucking power, easily breaks FRP muscle or rope.

Technology contents

The technical problems to be solved in the utility model is: the anchoring of existing intermediate plate incompatibility fibre reinforced composites (FRP) muscle or rope, the intermediate plate thread form is thinner triangle, the intermediate plate tooth directly contacts with FRP muscle or rope, when stressed, may pull FRP muscle or rope surface, cause the stripped thread phenomenon and under powerful chucking power, easily break the problem of FRP muscle or rope.Provide a kind of and in stretching process, not only can avoid scratch presstressed reinforcing steel surface, but also can avoid breaking presstressed reinforcing steel, anchor clipper that anchorage reliability is high greatly because of cusp pressure.

The technical scheme that solves its above-mentioned technical problem is: a kind of anchor clipper, two or three-chip type, the interior tooth that it is characterized in that intermediate plate is double-deck screw thread, the tooth form thickness of each layer screw thread is inequality, the pitch of screw thread can be identical, also can be different, there is thinner and more shallow tooth on the surface of scabbling at the crest of coarse thread, and thin and shallow tooth is a circular arc.

Because tooth is double-deck screw thread in the anchor clipper of the utility model, the tooth form thickness of each layer screw thread is not quite similar, there is thinner and more shallow tooth on the surface of scabbling at the crest of coarse thread, this thin and shallow tooth is a circular arc, thereby increased contact area between intermediate plate and FRP muscle or the rope, increased the frictional force between intermediate plate and FRP muscle or the rope, reduced the pressure of intermediate plate to FRP muscle or rope, FRP muscle or rope surface both can have been avoided pulling, cause the stripped thread phenomenon, can avoid again breaking FRP muscle or rope, improve the reliability of anchoring.The utility model intermediate plate also is applicable to general guy of twisted steel cable.

Description of drawings:

Fig. 1: the utility model anchor clipper structural representation;

Fig. 2: embodiment one described clamping piece structure schematic diagram (one of A portion partial enlarged drawing of Fig. 1);

Fig. 3: embodiment two described clamping piece structure schematic diagrames (the A portion partial enlarged drawing of Fig. 1 two).

The specific embodiment:

Below, the technical characterictic to the utility model anchor clipper is further described in conjunction with the accompanying drawings and embodiments.

Embodiment one:

A kind of anchor clipper, two or three-chip type, the interior tooth of intermediate plate (1) is double-deck screw thread, the tooth form thickness and the pitch P of each layer screw thread ₁, P ₂All inequality, the coarse thread pitch P ₁Greater than the closely-pitched pitch P ₂, the surface of scabbling at the crest of first floor coarse thread (2) has the thinner and more shallow tooth of one deck (3) again, and thin and shallow tooth is shaped as circular arc.

Embodiment two:

A kind of anchor clipper, two or three-chip type, the interior tooth of intermediate plate (1) is double-deck screw thread, the tooth form thickness of each layer screw thread is inequality but pitch is identical, i.e. the coarse thread pitch P ₁With the closely-pitched pitch P ₃Equate that the surface of scabbling at the crest of first floor coarse thread (2) has the thinner and more shallow tooth of one deck (3) again, thin and shallow tooth is shaped as circular arc.

Claims

1, a kind of anchor clipper, two or three-chip type is characterized in that: the interior tooth of intermediate plate (1) is double-deck screw thread, and the tooth form thickness of each layer screw thread is inequality, there is thinner and more shallow tooth (3) on the surface of scabbling at the crest of first floor coarse thread (2), and thin and shallow tooth (3) is a circular arc.

2, intermediate plate as claimed in claim 1 is characterized in that: the pitch P of each layer screw thread of described intermediate plate (1) ₁, P ₂All inequality, the coarse thread pitch P ₁Greater than the closely-pitched pitch P ₂

3, intermediate plate as claimed in claim 1 is characterized in that: the pitch P of described intermediate plate (1) each layer screw thread ₁, P ₃Identical.