RU5817U1 - DEVICE FOR TENSIONING ARMATURES IN PRELIMINARY STRESSED REINFORCED CONCRETE STRUCTURES - Google Patents

Abstract

Device for straining strands of strand reinforcement in prestressed concrete structures, including a hydraulic actuator, front and rear collet clamps, anchor and retainer clips, a hydraulic cylinder with a housing and pistons for tensioning and pressing in collet clamps, characterized in that it is equipped with a collet pressing sleeve that interacts with the tension piston clamps placed between the retainer clip and the sleeve of the press-off with a removable stop, fastened to the hydraulic cylinder body by tubular guides of beams straight Eve reinforcement breakup sleeve is arranged coaxially with the tubular guide pushers with a cylindrical inner surface within which reinforcement beams pryadevoy placed, wherein the pushers are made of different height, and the thickness of the removable abutment greater than the height of each pusher.

Description

Device.for reinforcement tension in prestressed concrete structures.

The proposal relates to construction using prestressed reinforced concrete structures, mainly in the construction of bridges, and t used in the manufacture of reinforced concrete

Known devices for tension nysHfoe strand reinforcement in prestressed concrete structures, including- roujeej hydraulic actuator, front and rear collet clamps, anchor and

retainer clips, guide} an e-cylinder with a body and pistons for tensioning and pressing in collet clamps,

And the introductory device has the following disadvantages. It has a large number of parts. When pressing collet clamps, it is an admixture for the greater inconvenience, which requires a lot of time to be eliminated.

 /. .

The purpose of the invention is to simplify the design while reducing labor costs during its operation. This goal is achieved due to the fact that the device for tensioning bundles of strand reinforcement in prestressed concrete structures, including a hydraulic actuator, anchor and retainer clips, a hydraulic cylinder with a housing and tension pistons and press-fit

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collet clamps, it is interconnected with the piston and the tension collet pressing sleeve located between the retaining clamp with a removable stop, fastened to the hydraulic cylinder body by tubular guides of strand reinforcement beams, the compression sleeve is made with placed cylindrical tubes CDOCHO the surfaces inside which the bundles of strand reinforcement are placed, the pushers are made high-height, and the thickness of the removable stop is greater than the heights of each pusher.

In Fig., The claimed device is presented. A device for straining strands of strand reinforcement in prestressed concrete structures includes a hydraulic actuator 1, front 2 and rear 3 collets, anchor 4 and retaining clips 5, a hydraulic cylinder with a housing & and tension pistons 7 and press-fit S collet clamps 2,3, the device is equipped

intermodeystukschey with a tension piston 7 sleeve 9 extrusion

, collet clamps, removable stop 10, placed between the locking

cage 5 and sleeve 9 and tubular guides 11 of the beams 12 of strand reinforcement, which are fastened to the housing 6- The sleeve 9 of the distributor is made with: pushers 13 arranged coaxially with the tube guide 3.1 with cylindrical inner surfaces 14, inside of which bundles 12 of the strand reinforcement are placed Pushers 13 made of different heights, and the thickness of the removable stop 10 is made greater than the height of each of the pushers 13,

The device operates as follows.

The bundles of n 5-core reinforcement are embedded in the structure 15 and passed into the anchor clip 4, Then a collet clip 2 is put on each of the bundles, which is held in the unpressed state in the anchor clip 4, Then, using a winch or other device not shown in the drawing) hydraulic cylinder, to

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design 15, let the bundles 12 pass through the tubular guides 11, On the bundles set stopper 5 and collet clamps 3. The housing 6 is supported} t on the structure 15 Ivzhdu the sleeve of the pressing and the retainer clip set removable stop 10, the device is ready to work

After turning on the hydraulic actuator and supplying the working fluid to the chamber 16 of the forward stroke of the tension piston,

the tension of the beams 12 comes to the required length (voltage) - The magnitude of the displacement of the piston is recorded by means of a ruler or a special device for remote measurement of displacement. Reinforcement strand tension completed.

Then, the working fluid is supplied to the forward piston chamber 17 of the press-in piston and the collet clamp 2 is clamped, in the anchor support 4. After the collet clamp 2 is clamped, the working fluid is fed into the reciprocating piston chamber 18 of the press-in piston S and the piston S is moved to its original position.

The collet clamps are pressed out from the retainer clip 5. For this, the detachable stop is removed and the tension piston is extended relative to the housing 6. In this case, the pushers having different heights push one collet clamps out of the retainer sleeve.

Therefore, this technical solution ALLOW

- simplify the process of extruding collet clamps

- to reduce labor costs and increase the reliability of work on the voltage of strands of straight armature in prestressed concrete and concrete structures.

- {,. - i.

Sources of information

. German Patent N23O8216, IKI EO4G 21/12, 74 Applicant / zT, Sitnikov

Claims (1)

Device for straining strands of strand reinforcement in prestressed concrete structures, including a hydraulic actuator, front and rear collet clamps, anchor and retainer clips, a hydraulic cylinder with a housing and pistons for tensioning and pressing in collet clamps, characterized in that it is equipped with a collet pressing sleeve that interacts with the tension piston clamps placed between the retainer clip and the sleeve of the press-off with a removable stop, fastened to the hydraulic cylinder body by tubular guides of beams straight Eve reinforcement breakup sleeve is arranged coaxially with the tubular guide pushers with a cylindrical inner surface within which reinforcement beams pryadevoy placed, wherein the pushers are made of different height, and the thickness of the removable abutment greater than the height of each pusher.