CN202658800U

CN202658800U - Anchoring clamping piece

Info

Publication number: CN202658800U
Application number: CN 201220200861
Authority: CN
Inventors: 林居章; 尹海宜; 马林; 邓宁
Original assignee: LIUZHOU VLM PRESTRESSED CO Ltd
Current assignee: LIUZHOU VLM PRESTRESSED CO Ltd
Priority date: 2012-05-08
Filing date: 2012-05-08
Publication date: 2013-01-09
Anticipated expiration: 2022-05-08

Abstract

The utility model discloses an anchoring clamping piece and relates to the technical field of anchorage devices. The anchoring clamping piece comprises a clamping piece body, an inner hole is arranged in the clamping piece body along an axial direction, left-hand thread teeth and right-hand thread teeth are arranged on the surface of the inner hole, the sections of the thread teeth are in a saw tooth shape or a triangular shape, tooth distance P of the right-hand thread teeth is in a range from 0.5mm to 2mm, tooth distance S of the left-hand thread teeth is in a range from 0.25mm to 2mm, tooth height K of the right-hand thread teeth is in a range from 0.3mm to 1.0mm, the tooth height H of the left-hand thread teeth is in a range from 0.1mm to 1.0mm, a spiral angle alpha of the right-hand thread teeth is in a range from 2 degrees to 45 degrees, and a spiral angle beta of the left-hand thread teeth is in a range from 2 degrees to 45 degrees. Compared with anchoring clamping pieces in prior art, the anchoring clamping piece has the advantages that the thread teeth with sections which are in the saw tooth shape or the triangular shape are utilized, a frictional force between the clamping piece and the surface of prestressed rib and a mechanical meshing capacity are increased, strength of the thread teeth in the inner hole of the clamping piece is effectively improved, when the clamping piece is tensioned, the self-anchorage performance is facilitated, the spiral angle of the thread teeth is in a range from 2 degrees to 45 degrees, frictional contact points between the clamping piece and the surface of the prestressed rib are increased, and damaged area of the prestressed rib caused by the clamping of the clamping piece during anchoring is reduced.

Description

Anchoring clamping plate

Technical field

The utility model relates to the ground tackle technical field, especially a kind of anchoring clamping plate for anchoring steel wire or steel strand.

Technical background

Prestressing technique is more and more widely used in modern construction engineering, be exactly the intermediate plate ground tackle and in the pre-stress construction process, adopt maximum, vital part in the intermediate plate ground tackle is exactly anchoring clamping plate, and one pair of anchoring clamping plate and a taper hole anchor ring form an anchoring unit the most basic; Its anchoring principle is exactly to utilize the intensity mechanical snap ability of anchoring clamping plate endoporus thread self to add that taper anchoring clamping plate and anchor ring taper hole cooperate self-lock force to come the anchoring prestress muscle; Present anchoring clamping plate is because the structural limitations of endoporus thread, when anchoring steel wire or steel strand, small end endoporus at anchoring clamping plate, ridge generally is almost vertically to cut into the presstressed reinforcing steel surface, thereby cause that the presstressed reinforcing steel failure stress increases, thereby produce the property sheared destruction at anchoring clamping plate small end endoporus, when not reaching the intensity of tension of prestressed tendon requirement, produce in advance fracture, especially stayed-cable bridge with intermediate plate anchor and some such as specific engineerings such as nuclear power plant containment shell engineerings in, because the ground tackle dynamic load is stressed, use common anchoring clamping plate to increase presstressed reinforcing steel damaged area, affect the intensity of prestressed material integral body, cause prestressed minimizing in the building prestressed concrete, increase potential safety hazard, affect the building engineering construction quality, reduce the application life of construction work.

The utility model content

The utility model provides a kind of anchoring clamping plate, the small end endoporus that it can solve existing anchoring clamping plate causes that destructive stress is concentrated, thereby the shearing destruction of anchoring clamping plate small end endoporus generation to presstressed reinforcing steel, when not reaching the intensity of tension of prestressed tendon requirement, produce in advance the problem of fracture.

In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: it includes the intermediate plate body that the up big and down small conical key by the two-chip type of five equilibrium or three-chip type forms, be provided with vertically endoporus in the intermediate plate body, described bore area is provided with left hand thread tooth and right-handed thread tooth, it is characterized in that: the cross section of described ridge is zigzag or triangle, the described right-handed thread sound of baby talk is 0.5mm～2mm apart from P, and the described left hand thread sound of baby talk is 0.25mm～2mm apart from S; The high K of the described right-handed thread sound of baby talk is 0.3mm～1.0mm, and the high H of the described left hand thread sound of baby talk is 0.1mm～1.0mm; The spiral angle α of described right-handed thread tooth is 2 °～45 °, and the spiral angle β of described left hand thread tooth is 2 °～45 °.

In the technique scheme, scheme is more specifically: the length L of described intermediate plate body is 25 mm～80mm; The described endoporus of described intermediate plate body is isometrical endoporus, and this diameter of bore φ is 5mm～35mm, and the taper hole length C of described endoporus small end is 5mm～20mm.

Owing to adopted technique scheme, the utility model compared with prior art has following beneficial effect:

1, owing to is processed with zigzag or triangle thread tooth at bore area, increase frictional force and the mechanical snap ability on intermediate plate and presstressed reinforcing steel surface, adopt zigzag or triangle thread tooth, the intensity of Effective Raise intermediate plate endoporus thread self, when being conducive to intermediate plate stretch-draw from the anchor performance.

2, the zigzag of the bore area of wedge shape intermediate plate or triangle thread tooth are the odontogenetic reticulate pattern threads of left hand thread tooth and right-handed thread, the spiral angle of ridge is 2 °～45 °, increased the CONTACT WITH FRICTION point on intermediate plate and presstressed reinforcing steel surface, reduced intermediate plate in the anchoring process to presstressed reinforcing steel Clamping damage area, higher more reliable anchoring property is especially arranged under low-stress state, eliminate safe hidden trouble, can be relieved be used in large-scale cable stayed bridge and other require greatly to improve the safety of presstressed reinforcing steel in structural engineering in the better building structure of safety.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the top view of Fig. 1.

Fig. 3 is the structural representation of the utility model key inboard.

Fig. 4 is the B-B sectional view of Fig. 2.

Fig. 5 is the I place enlarged drawing of Fig. 3.

Fig. 6 is the II place enlarged drawing of Fig. 4.

Fig. 7 is the III place enlarged drawing of Fig. 4.

Fig. 8 is the IV place enlarged drawing of Fig. 4.

The specific embodiment

Below in conjunction with the accompanying drawing example, the utility model is further described:

Such as Fig. 1, shown in Figure 2, the anchoring clamping plate of present embodiment includes the intermediate plate body 1 that the up big and down small conical key by the two-chip type of five equilibrium forms, the taper key adopts the alloy steel material manufacturing, through blanking, forge, fraising, the car male cone (strobilus masculinus), face work, tapping, groove milling, cut open, heat treatment, the operation machine-shapings such as surfacing, be provided with vertically endoporus 2 in the intermediate plate body, as shown in Figure 3, bore area is provided with left hand thread tooth 3-2 and right-handed thread tooth 3-1, the cross section of ridge 3 is zigzag, can increase like this frictional force and the mechanical snap ability on intermediate plate and presstressed reinforcing steel surface, adopt the saw-tooth thread tooth, the intensity of Effective Raise intermediate plate endoporus thread self, when being conducive to intermediate plate stretch-draw from the anchor performance, such as Fig. 4, Fig. 6 and shown in Figure 7, right-handed thread tooth 3-1 tooth is 2mm apart from P, and left hand thread tooth 3-2 tooth is 1.5mm apart from S, right-handed thread tooth 3-1 tooth apart from P can equal or can less than or can be greater than left hand thread tooth 3-2 tooth apart from S; The high K of the right-handed thread sound of baby talk is 1.0mm, and the high H of the left hand thread sound of baby talk is 1.0mm; As shown in Figure 5, the spiral angle α of right-handed thread tooth is 20 °, the spiral angle β of left hand thread tooth is 45 °, the spiral angle α of right-handed thread tooth can equal or can less than or can be greater than the spiral angle β of left hand thread tooth, the spiral angle of ridge has increased, namely increased the CONTACT WITH FRICTION point on intermediate plate and presstressed reinforcing steel surface, reduced intermediate plate in the anchoring process to presstressed reinforcing steel Clamping damage area, higher more reliable anchoring property is especially arranged under low-stress state, eliminate safe hidden trouble, can be relieved be used in large-scale cable stayed bridge and other require greatly to improve the safety of presstressed reinforcing steel in structural engineering in the better building structure of safety; The length L of intermediate plate body 1 is 50mm; The endoporus of intermediate plate body is isometrical endoporus, and this diameter of bore φ is 20mm, and as shown in Figure 8, the taper hole length C of endoporus small end is 20mm.

In above-described embodiment, zigzag still can be adopted in the cross section of ridge.

Claims

1. anchoring clamping plate, include the intermediate plate body that the up big and down small conical key by the two-chip type of five equilibrium or three-chip type forms, be provided with vertically endoporus in the intermediate plate body, described bore area is provided with left hand thread tooth and right-handed thread tooth, it is characterized in that: the cross section of described ridge is zigzag or triangle, the described right-handed thread sound of baby talk is 0.5mm～2mm apart from P, and the described left hand thread sound of baby talk is 0.25mm～2mm apart from S; The high K of the described right-handed thread sound of baby talk is 0.3mm～1.0mm, and the high H of the described left hand thread sound of baby talk is 0.1mm～1.0mm; The spiral angle α of described right-handed thread tooth is 2 °～45 °, and the spiral angle β of described left hand thread tooth is 2 °～45 °.

2. anchoring clamping plate according to claim 1, it is characterized in that: the length L of described intermediate plate body is 25 mm～80mm; The described endoporus of described intermediate plate body is isometrical endoporus, and this diameter of bore φ is 5mm～35mm, and the taper hole length C of described endoporus small end is 5mm～20mm.