CN219528164U

CN219528164U - High-strength steel strand extrusion type anchorage device

Info

Publication number: CN219528164U
Application number: CN202320575322.3U
Authority: CN
Inventors: 刘建英; 韦建宏; 黄振桂; 郑琪; 郑波
Original assignee: Liuzhou Qm Construction Machinery Co ltd
Current assignee: Liuzhou Qm Construction Machinery Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-08-15
Anticipated expiration: 2033-03-22

Abstract

The utility model discloses a high-strength steel strand extrusion type anchorage device, which relates to the technical field of anchoring the end part of a steel strand in prestressed concrete construction, and comprises an extrusion spring and an extrusion sleeve, wherein an inward protruding groove is punched at the intersection of one end surface of the extrusion sleeve and the inner wall of the extrusion sleeve, the groove is symmetrically arranged, the groove is arranged on the protruding inner wall of the groove edge of the inner wall of the extrusion sleeve, and the extrusion spring is arranged in the extrusion sleeve.

Description

High-strength steel strand extrusion type anchorage device

Technical Field

The utility model relates to the technical field of anchoring ends of steel strands in prestressed concrete construction, in particular to a high-strength steel strand extrusion type anchorage device.

Background

Along with the development and progress of structural design and material science and the continuous innovation of construction process, the prestressed steel strands are gradually developed towards the high strength direction to reduce the number of steel strands in each prestressed tendon in order to adapt to the requirements of a large-span and heavy-load prestressed structure. The existing prestress steel strand adopted in China is of 1860MPa level in strength, and application of 2400MPa high-strength steel strand in engineering is lacking. Under the existing raw materials and the existing technical level, the development of 2400 MPa-level steel strands is the main development direction for increasing the strength of the steel strands and further improving the breaking force of the steel strands. The steel strand with the strength of 2400MPa is produced in China, a clamping piece type anchorage device is developed and produced by the manufacturer and used as a fixed end anchorage device of 2400MPa, the clamping piece type anchorage device is used as a fixed end anchorage device of 2400MPa, the problems of complex construction operation, high cost, easy slipping and the like exist, the existing extrusion type anchorage device is used as a fixed end anchorage device of 2400MPa, the existing extrusion type anchorage device is in a commonly used structure form at present, the existing extrusion type anchorage device consists of an extrusion sleeve and an extrusion spring, outer chamfer angles are formed on the peripheral end face of the extrusion sleeve, the inner wall of the extrusion sleeve is a cylindrical cavity, and the extrusion sleeve and the extrusion spring are separated before use, so that the following defects exist: 1. the compression spring is large in brittleness and is easy to break in the process of shipment, so that the anchoring efficiency coefficient of the compression spring is affected. 2. Before extrusion, the extrusion spring is sleeved into the steel strand, and the steel strand is threaded into the extrusion sleeve to be extruded, so that the workers are time-consuming to install the extrusion spring, the extrusion spring is easy to break, and reliable anchoring of the steel strand cannot be guaranteed.

Disclosure of Invention

The utility model aims to solve the problem of time and labor waste in installation when the existing extrusion type anchorage serving as a fixed end anchorage of a steel strand with the strength of 2400MPa is used.

In order to solve the problems, the utility model adopts the technical scheme that the novel extrusion sleeve comprises an extrusion spring and an extrusion sleeve, wherein at least two inwards protruding grooves are punched at the intersection of one end surface of the extrusion sleeve and the inner wall of the extrusion sleeve, the grooves are symmetrically arranged, the grooves are positioned on the groove edge of the inner wall of the extrusion sleeve and protrude out of the inner wall, and the extrusion spring is arranged in the extrusion sleeve.

Among the above-mentioned high strength steel strand extrusion formula ground tackle technical scheme, more specific technical scheme can also be: the groove edges of the groove on the inner wall of the extrusion sleeve are obliquely arranged on the inner wall of the extrusion sleeve.

Further, the grooves are two, three, four or five.

Further, the inner diameter r of the extrusion sleeve is phi 18.4-phi 18.6mm, and the distance L of the groove extending to the inner wall of the extrusion sleeve is 1-2 mm.

Further: the two end faces of the periphery of the extrusion sleeve are respectively provided with an outer chamfer, the length H of the straight edge of the outer chamfer is 8mm, and the length H of the extrusion sleeve is 58-59 mm.

Due to the adoption of the technical scheme, compared with the prior art, the utility model has the following beneficial effects:

1. because at least two inward protruding grooves are punched at the intersection of one end face of the extrusion sleeve and the inner wall of the extrusion sleeve, the end opening of the extrusion sleeve is reduced by the inward protruding grooves, and the extrusion spring arranged in the extrusion sleeve is prevented from being separated from the extrusion sleeve when the steel stranded wire passes through the extrusion spring.

2. The extrusion strength is high, the fracture is not easy to occur, and the anchoring reliability is good; the extrusion spring is installed in a factory, and can be directly sleeved on the steel strand for extrusion during construction, so that the process of sleeving the extrusion spring on the steel strand is omitted, the working efficiency is high, the extrusion labor intensity is reduced, and the injury of fingers is avoided during the installation of workers; the extrusion length is short, the extrusion efficiency is high, the service life of the extrusion die can be effectively prolonged, and the construction cost is low.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic view of the structure of the squeeze jacket of the present utility model.

Fig. 3 is an a-direction view of fig. 2.

Fig. 4 is a schematic view of the extruded structure of the present utility model.

FIG. 5 is a schematic view of the structure of the present utility model fed into an extrusion die.

Description of sequence number:

the extrusion die comprises an extrusion spring 1, an extrusion sleeve 2, an end face 2-1, a groove 2-2, an outer chamfer 2-3, a steel strand 3 and an extrusion die 4.

Detailed Description

The utility model is further described in detail below with reference to the examples of the drawings:

the utility model as shown in fig. 1-3 comprises a compression spring 1 and a compression sleeve 2, wherein three inwards protruding grooves 2-2 are punched at the intersection of the end face 2-1 of the extending end of a steel strand 3 of the compression sleeve 2 and the inner wall of the compression sleeve 2, the grooves are symmetrically arranged in an equilateral triangle shape, the grooves are positioned on the protruding inner wall of the groove edge of the inner wall of the compression sleeve, the groove edge is obliquely arranged on the inner wall of the compression sleeve 2, and the compression spring 1 is arranged in the compression sleeve 2; the inner diameter r of the extrusion sleeve is phi 18.4-phi 18.6mm, the distance L of the groove extending to the inner wall of the extrusion sleeve is 1-2 mm, which is equivalent to the inward protruding groove to reduce the port of the end, so that the extrusion spring arranged in the extrusion sleeve is prevented from being separated from the extrusion sleeve when the steel stranded wire passes through the extrusion spring; the two end surfaces of the periphery of the extrusion sleeve are respectively provided with an outer chamfer 2-3, the length H of the straight edge of the outer chamfer is 8mm, and the length H of the extrusion sleeve is 58-59 mm.

Workers in factories already install the extrusion spring 1 in the extrusion sleeve, the extrusion spring is protected by the extrusion sleeve, and the extrusion spring is not easy to break in the process of shipment. During extrusion, as shown in fig. 4 and 5, the steel strand can be directly penetrated from the end without the groove and extended from the end with the groove, the steel strand is extruded by the extrusion spring, and the steel strand provided with the utility model is sent into the extrusion die 4 for extrusion. The extrusion anchor device with the structure has the advantages of short extrusion length, high extrusion efficiency, effectively prolonged service life of the extrusion die and low construction cost.

The utility model is applicable to steel strands:

1) Monofilament with strength of 2400MPa and 1X 7 wire structure phi 15.2-phi 21.6mm is sprayed, filled with epoxy steel stranded wire and galvanized steel stranded wire.

2) The strength is 1860MPa, phi 21.8mm, phi 28.6mm of the large-diameter steel strand with the 1X 19 wire structure.

Claims

1. The utility model provides a high strength steel strand wires extrusion formula ground tackle, includes extrusion spring and extrusion cover, its characterized in that: at least two inwards protruding grooves are punched at the intersection of one end face of the extrusion sleeve and the inner wall of the extrusion sleeve, the grooves are symmetrically arranged, the grooves are located on the groove edge of the inner wall of the extrusion sleeve and protrude out of the inner wall, and the extrusion spring is arranged in the extrusion sleeve.

2. The high strength steel strand extrusion anchor of claim 1, wherein: the groove edges of the groove on the inner wall of the extrusion sleeve are obliquely arranged on the inner wall of the extrusion sleeve.

3. The high strength steel strand extrusion anchor of claim 1 or 2, wherein: the grooves are two or three or four or five.

4. The high strength steel strand extrusion anchor of claim 1 or 2, wherein: the inner diameter r of the extrusion sleeve is phi 18.4-phi 18.6, and the distance L of the groove extending towards the inner wall of the extrusion sleeve is 1-2 mm.

5. The high strength steel strand extrusion anchor of claim 1 or 2, wherein: the two end faces of the periphery of the extrusion sleeve are respectively provided with an outer chamfer, the length H of the straight edge of the outer chamfer is 8mm, and the length H of the extrusion sleeve is 58-59 mm.