CN2821008Y

CN2821008Y - Anchor clamp sheet

Info

Publication number: CN2821008Y
Application number: CN 200520096572
Authority: CN
Inventors: 彭学; 杨立中; 钟家林; 王柳平; 熊武; 包红星; 黄翰
Original assignee: Liuzhou OVM Machinery Co Ltd
Current assignee: Liuzhou OVM Machinery Co Ltd
Priority date: 2005-05-28
Filing date: 2005-05-28
Publication date: 2006-09-27
Anticipated expiration: 2015-05-28

Abstract

The utility model provides an anchor-device clamping sheet which relates to a prestressed anchor-device fitting used for architectural construction, and the wall of an inner hole of the prestressed anchor-device fitting is provided with inner teeth engaged with the outer surface of a steel stranded wire. The utility model is characterized in that along the direction from the big end of the anchor-device clamping sheet to the small end of the anchor-device clamping sheet, the diameter phiC of the tooth bottom of each inner tooth, the width delta of each tooth cusp and the tooth distance d are all kept unchanged, the heights of the inner teeth vary in a decreasing mode, the widths of the tooth bottoms vary in an increasing mode, the connecting line of the teeth cusps forms an inner cone of which the angle is alpha, and the numeric area of the alpha is that the alpha is larger than 0 DEG and smaller than 15 DEG; the inner teeth are arranged in parallel, and are parallel to both end surfaces of the clamping sheet; a circular arc R is used as the transition between the flat surface of the tooth bottom of each inner tooth and either of the two side surfaces of each tooth. The anchor-device clamping sheet can effectively reduce the damage to a prestressed tendon, and simultaneously, the pressure borne by the prestressed tendon is reduced, so the anchoring efficiency of an anchor device is improved and the engineering safety is increased.

Description

Anchor clipper

Technical field:

The utility model relates to the prestressed anchor accessory that a kind of building operations is used, particularly a kind of anchor clipper.

Background technology:

At present, the intermediate plate anchor is the most frequently used prestressed anchor, and most important part is exactly an intermediate plate in the intermediate plate anchor, and wherein the tooth form of intermediate plate is again the key factor that influences the intermediate plate quality.Because cooperating and influence that anchor slab is out of shape of intermediate plate and anchor slab inner conical surface, the chucking power of intermediate plate clamping presstressed reinforcing steel increases to little extreme direction gradually along the big end of intermediate plate, in order to reduce damage to presstressed reinforcing steel, the bore design of existing intermediate plate becomes straight hole+taper hole, wherein, the endoporus of intermediate plate small end is a taper hole, make the height of tooth in the intermediate plate small end taper hole reduce (seeing Fig. 3 and Fig. 4) gradually along the little extreme direction of intermediate plate outer cone, the direction that the interior tooth of this intermediate plate small end part increases along chucking power stings into that the degree of depth of presstressed reinforcing steel reduces gradually, thereby has reduced the damage of this part to presstressed reinforcing steel.But still there is following defective in this structure: because the thread form of intermediate plate small end inner cone section is imperfect, the width of cusp is wideer than the cusp width of remainder, (sees K among Fig. 4 ₄＜K ₃＜K ₂＜K ₁＜K ₀), make the interior tooth of this intermediate plate small end inner cone section part can not sting into presstressed reinforcing steel fully, when the presstressed reinforcing steel degree of injury is reduced to some extent, increased the compressive stress of intermediate plate small end to presstressed reinforcing steel, be extruded and cause stress concentrated thereby presstressed reinforcing steel occurs, cause presstressed reinforcing steel to destroy in advance.

The utility model content:

The technical problems to be solved in the utility model is: a kind of damage that can reduce presstressed reinforcing steel is provided, does not increase the anchor clipper of anchor clipper small end to the compressive stress of presstressed reinforcing steel again.

The technical scheme that solves its above-mentioned technical problem is: a kind of anchor clipper, the interior tooth that is meshed with the presstressed reinforcing steel external surface is arranged on its inner hole wall, it is characterized in that: along the big end of anchor clipper toward little extreme direction, root diameter φ C, cusp width δ and the tooth of tooth all remain unchanged apart from d in described, interior tooth height changes from high to low, the ascending variation of tooth bottom width degree, cusp line shape are the inner cone of α at an angle, and the span of this α is 0 °＜α＜15 °.

As another feature of the present utility model be: tooth is and is arranged in parallel in described, and is parallel to the intermediate plate both ends of the surface.

As another feature of the present utility model be: be the circular arc R transition in described between the two sides of sound of baby talk baseplane and tooth.

Because adopt said structure, the anchor clipper of the utility model is compared with existing intermediate plate, has following beneficial effect:

1, improve the anchoring efficient of ground tackle, increased the degree of safety of engineering:

Because the interior tooth of the anchor clipper of the utility model is along the big end of anchor clipper toward little extreme direction, its root diameter φ C and tooth remain unchanged apart from d, interior tooth height changes from high to low, be H＞h (referring to Fig. 1), line shape is the inner cone of α at an angle at the bottom of the interior cusp line of anchor clipper and the interior tooth, make intermediate plate small end bottom outlet bigger, i.e. φ D than hole, big bottom ₁＞φ D ₂(referring to Fig. 1); The tooth bottom width is changed from small to big along the big end of intermediate plate toward little extreme direction, i.e. L ₄＜L ₃＜L ₂＜L ₁＜L ₀(referring to Fig. 2), pressure-bearing surface strengthens gradually at the bottom of the tooth, the stress of intermediate plate small end is reduced, cusp width δ remain unchanged (referring to Fig. 2) simultaneously, interior tooth is stung into presstressed reinforcing steel easily, so this intermediate plate can reduce the presstressed reinforcing steel pressure when effectively reducing the presstressed reinforcing steel damage, thereby improve the anchoring efficient of ground tackle, increase the degree of safety of engineering;

2, anchoring is reliable:

Because being, the interior tooth of the anchor clipper of the utility model is arranged in parallel, and be parallel to intermediate plate both ends of the surface (referring to Fig. 1), compare with the spiral tooth form of existing intermediate plate, make the stressed more even of anchor clipper, thereby make the anchoring of anchor clipper more reliable perpendicular to tooth in the same circle of axis;

3, reduce stress and concentrate, it is safer that intermediate plate is used:

Because between the interior sound of baby talk baseplane of the anchor clipper of the utility model and the two sides of tooth be circular arc R transition (referring to Fig. 2), compare (referring to Fig. 4) at the bottom of the tooth of point with existing intermediate plate, it is concentrated effectively to reduce stress, makes the intermediate plate use safer.

Description of drawings:

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

The local enlarged diagram of the A portion of Fig. 2: Fig. 1;

Fig. 3: the structural representation of existing intermediate plate;

The local enlarged diagram of the B portion of Fig. 4: Fig. 3.

The specific embodiment:

Embodiment one:

A kind of anchor clipper has the interior tooth that is meshed with the steel strand external surface on its inner hole wall, along the big end of anchor clipper toward little extreme direction, root diameter φ C, cusp width δ and the tooth of described interior tooth all remain unchanged apart from d; Interior tooth height changes from high to low, and when the tooth height of the big end of intermediate plate is H, the tooth height of intermediate plate small end is h, then H＞h; Interior cusp line shape is the inner cone of α at an angle, and the span of this α is 0 °＜α＜15 °; Tooth is and is arranged in parallel and is parallel to the intermediate plate both ends of the surface, the ascending variation of tooth bottom width degree L, i.e. L in it in described ₄＜L ₃＜L ₂＜L ₁＜L ₀, (referring to Fig. 1, Fig. 2).

Can be circular arc R transition (referring to Fig. 2) between the two sides of sound of baby talk baseplane and tooth in described.

As a kind of conversion of the utility model embodiment, along the big end of anchor clipper toward little extreme direction, tooth bottom width degree also can be constant in it.

As another conversion of the utility model embodiment, described interior tooth also can be uneven spiral line type.

Claims

1, a kind of anchor clipper, the interior tooth that is meshed with the steel strand external surface is arranged on its inner hole wall, it is characterized in that: along the big end of anchor clipper toward little extreme direction, root diameter φ C, cusp width δ and the tooth of tooth all remain unchanged apart from d in described, interior tooth height changes from high to low, interior sound of baby talk point line shape is the inner cone of α at an angle, and the span of this α is 0 °＜α＜15 °.

2, anchor clipper according to claim 1 is characterized in that: along the big end of anchor clipper toward little extreme direction, and the ascending variation of tooth bottom width degree in it.

3, anchor clipper according to claim 1 and 2 is characterized in that: tooth is and is arranged in parallel in described, and is parallel to the intermediate plate both ends of the surface.

4, anchor clipper according to claim 3 is characterized in that: be the circular arc R transition in described between the two sides of sound of baby talk baseplane and tooth.

5, anchor clipper according to claim 1 and 2 is characterized in that: be the circular arc R transition in described between the two sides of sound of baby talk baseplane and tooth.