CN2061930U

CN2061930U - Prestressed tension structure

Info

Publication number: CN2061930U
Application number: CN 90201952
Authority: CN
Inventors: 付敏华; 付平
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-02-17
Filing date: 1990-02-17
Publication date: 1990-09-12

Abstract

The utility model relates to a prestressed tension structure which is suitable for the box-shaped girder steel, especially the deformed repair of the downwarping of the main beam of the bridge-type (gate-type) crane, is it adopted the integral enclosed construction, the elements such as screw-shaped draw rods are all installed in the box body. The inner chamber of the rope head casting opening of the utility model is square conical contour in order to increase the stretching force and the safety performance of the tension structure, the anti-loosing panel of the sleeve and the steel cable safe hanging clamp is also added. The utility model not only enhances the safety performance and the ultimate stretching force, but also provided with beautiful appearance, and easy to be installed and the effect of dust-proof is good.

Description

Prestressed tension structure

The utility model is the pre-stress stretching device that a kind of box steel beam that is applicable to, especially bridge-type (gate-type) crane girder lower flexure strain is repaired.

In the prior art, " prestressed tensioner " of seeing bulletin on November 11st, 1987 (CN86209683) by two seat supports, globality is poor, and inconvenience is installed, and lacks the necessary security setting.

The purpose of this utility model is that above-mentioned technology is improved, and a kind of good integrity is provided, and is convenient to safety performance height, the prestressed tensioner that stretching force is big are installed.

The utility model adopts integrally closed box type construction, and parts such as thread are installed in the casing.Thread one end is hinged with being connected, and connecting hinge can slide in casing.Connect hinge and be fixed with that can to hold its inner chamber of many steel ropes be the pouring basin of rope end of square pyramidal shaped, to improve the stretching force of tensioner.Loosening for preventing pull-rod nut, tensioner is equipped with locking cage plate.The utility model has also been set up safety hanging clamp, causes the accident to avoid wire cable rupture to get rid of earthward.Safety hanging clamp is made of two clamping plates, is fixed on the base plate of crane girder.

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

Fig. 2 is that the A of Fig. 1 is to diagrammatic sketch;

Fig. 3 is a scheme of installation of the present utility model;

Fig. 4 is the structural representation of safety hanging clamp.

Embodiment of the present utility model: thread 2 one ends in the casing 1 are used bearing pin 3 and are connected hinge 4 connections.Have 2 webge slots on the connection hinge 4, it is that wedge shape, inner chamber are the pouring basin of rope end 5 of square pyramidal shaped that 2 profiles are housed in the groove.Dress is during steel rope, multistrand rope 8 alignment, firm and penetrate in the pouring basin of rope end 5 with the thin wire colligation near the fag end place, then fag end is broken curve 60 ° hook-shaped, dead admittedly with the Babbitt matal pouring, again pouring gate 5 is embedded in the webge slot that connects on the hinge 4, fixing with pressing plate 7 and bolt 6.The screwed end of thread stretches out casing 1.Swivel nut 9, by packing ring 10, one direction thrust bearing 11 and with the bearing location cover for seat 12 that casing fixes as one, thread is driven connects hinge to displacement, thus stretching wire rope 8, make the crane girder arch, reach the purpose of reparation.After the stretch-draw the locking cage plate 13 of interior hexagonal is enclosed within on the nut 9, and affixed with bolt 14, nut 15 and bearing location cover for seat 12.Locking cage plate 13 is welded with dust boot 16.During installation, casing 1 is welded on an end of crane girder base plate 17.Steel rope 8 one ends are fixed on and connect on the hinge 4, and the other end is walked around the dead sheave 26 that is welded on crane girder 17 base plates, and are fixed near the casing 1 the fixedly hinge 18.Upper and lower clamping plate 20, the 21 usefulness bolts 22 of safety hanging clamp 19 and nut 23 are fixing.In the corresponding groove 24 between steel wire penetrating two clamping plate, its groove depth is 2/3 of a wirerope diameter, and groove width is 2 times of wirerope diameter.Attaching parts 25 is fixed on safety hanging clamp on the crane girder base plate.3 to 5 of the general employings of safety hanging clamp are advisable.

The utility model has not only improved security performance and limit stretching force, and good looking appearance, is easy to install, and good dustproof effect is a kind of comparatively ideal lifting device girder Deformation Repair device.

Claims

1, a kind of prestressed tensioner that is used for the reparation of box steel beam, especially bridge-type (gate-type) crane girder lower flexure strain, constitute by thread 2, connection hinge 4, bearing pin 3, nut 9, steel rope 8 and pulley 26, it is characterized in that: inner chamber is that the pouring basin of rope end 5 of square pyramidal shaped is fixed on the connection hinge 4 that can slide in casing 1, locking cage plate 13 is enclosed within on the nut 9 and is affixed with bearing location cover for seat 12, and steel wire penetrating is fixed on the safety hanging clamp 19 on the crane girder base plate.

2, prestressed tensioner according to claim 1 is characterized in that the upper and lower clamping plate 20,21 of safety hanging clamp 19 have groove 24, and its groove depth is 2/3 of a wirerope diameter, and groove width is 2 times of wirerope diameter.