Device for tensioning reinforcement

 

(57) Abstract:

Usage: in the field of construction for the manufacture of prestressed concrete structures. The inventive device for tensioning the valve includes a housing, a cylinder with the rod and grip the valve, it is provided located in a housing with an emphasis in stock crossmember installed it parallel to and equidistant from its longitudinal axis by a pair of punches, and the capture is made in the form of a sleeve with an outer annular groove and located along the axis of the cylinder in the casing, the casing is made holes for the punches and the slot to install the bushings. In addition, the coupling can be performed with a longitudinal slot, equal in width to the diameter of the sleeve hole. 1 C.p. f-crystals, 5 Il.

The invention relates to the field of construction and is intended for the manufacture of prestressed concrete structures, such as: hollow-core floor slabs, slabs and roofs and ceilings, with flow-aggregate and convernor methods for their production.

A device for tensioning reinforcement, including the emphasis made in the form of guides, in which is mounted a grip, and werenot in the manufacture, and waste valves that cut off after the operation of the tension.

Closest to the present invention is a device for tensioning reinforcement, including the body of the hydraulic cylinder with a rod gripper with self-locking jaws [2].

The disadvantage of this device is the design complexity of the engagement, having an external thread for sleeve, the locking taut armature, and that rests directly on the support rod has a through groove, i.e., bifurcated fork tip. Such design features of the device does not provide axial perception of effort on the rod, lead to reduced durability, increase of labor required for its operation.

The technical problem is to simplify the tensioning armature mechanically, reducing the complexity of the installation device in tension, and increase its reliability and durability.

This objective is achieved in that the device for tension reinforcement, comprising a casing, a cylinder with the rod and grip the valve, it is provided with a located in the housing with an emphasis in stock crossmember installed it parallel to and equidistant from its longitudinal axis PA is e chassis, in the end of the body with holes for the punches and the slot to install the bushings.

The sleeve device can be performed with a longitudinal slot equal in width to the diameter of the sleeve hole.

The device differs from the well-known fact that in case it introduced an intermediate link, the traverse with the punches. Running head plate with the punches with emphasis in the support plate by a pair of plungers located on a traverse parallel to and equidistant from its longitudinal axis and with an emphasis crossmember in the stock cylinder on its axis provides precise axial perception of effort on the stock, which increases the reliability and durability of the hydraulic cylinder and the device in General.

The capture is in the form of a sleeve with an annular groove to facilitate the reliability of fixing of reinforcement in the process of its tension, thus the performance of the longitudinal slots in the sleeve width equal to the diameter of the holes makes it easy to wear the sleeve on the valve after installation of end anchors to the valve. The design of the grip excluded threaded connection, which facilitates installation and removal of the device when the tension.

In Fig. 1 shows the device of Fig. 2 - section a-a of Fig. 1, powernotes In Fig. 4.

The device consists of a housing 1 connected to cylinder 2 in which is placed the rod 3. The shaft 3 abuts against the yoke 4 with the attached punches 5. At the end of the body 1 is placed the sleeve 6. For ease of installation sleeve on the valve, it can be done with a longitudinal slot.

The device operates as follows.

To the valve 7 with an emphasis in the anchor 8 is placed the sleeve 6. Through the axial hole in the end of the body 1, the sleeve 6 with the armature 7 is introduced into engagement with the housing 1 of the device by means of an annular groove of the sleeve 6. When this yoke 4 punches 5 abuts against the support plate 9. And the stem 3 of the cylinder 2 in the yoke 4. Through the fitting 10 into the cavity of the cylinder 2 serves oil. The cylinder 2 is moved from the base plate 9 together with the sleeve 6. In this case, the sleeve 6, resting on the anchor 8, moves a valve 7, pulling her. Upon reaching the desired tension in the valve 7, the oil flow through the nozzle 10 is stopped and the valve is fixed. Then deliver the oil through the nozzle 11 and the rod 2 with the head plate 4 and punches 5 removed from the base plate 9. The device is then removed from the sleeve 6 and carry out concreting. After hardening of the concrete, the sleeve is removed and sent for re-use is ture, characterized in that it has located in the housing with an emphasis in stock crossmember installed it parallel to and equidistant from its longitudinal axis by a pair of punches, and the capture is made in the form of a sleeve with an outer annular groove and located along the axis of the cylinder in the casing, the casing is made holes for the punches and the slot to install the bushings.

2. The device under item 1, characterized in that the sleeve is made with a longitudinal slot, equal in width to the diameter of the sleeve hole.

 

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