RU2151249C1 - Gear to stress bundles of strand reinforcement of ferroconcrete structures - Google Patents

Abstract

FIELD: construction industry. SUBSTANCE: gear to stress bundles of strand reinforcement of ferroconcrete structures includes hydraulic drive, anchor and stopping fittings, front and rear collet clamps of bundles of strand reinforcement placed correspondingly in anchor and stopping fittings, hydraulic cylinder with case and piston forming together with case chambers of forward and reverse strokes, device to press front collet clamps with guiding passages for strands placed between tension piston and anchor fitting that can come in the form of pressing piston forming together with case chamber of forward stroke. Pressing piston is made with guiding passages for strands and is arranged for interaction with front collet clamps. Stopping fitting is installed in tension piston. Gear is fitted with device for pressing and pressing-out of rear collet clamps fabricated, for instance, in the form of additional piston fastened to tension piston and mounted for movement with regard to tension piston of case with rest that interacts with additional case of pusher mounted for interaction with butts of rear collet clamps. Additional case and piston form pressing and pressing-out chambers of rear collet clamps. Case of gear rests against anchor fitting via transducer of stress of bundles. Extending guiding tubes are pressed into guiding passages. Indicator is used to check stress of bundles. EFFECT: increased accuracy of observance of technological mode with simultaneous reduction of time needed for auxiliary operations. 2 cl, 2 dwg

Description

 The proposal relates to the construction using reinforced concrete structures, mainly in the construction of bridges, as well as to devices used in the manufacture of reinforced concrete structures.

 A device for tensioning beams from strands of reinforced concrete structures is known, including a support, hydraulic actuator, anchor and retainer clips, front and rear collet clips, respectively, in the anchor and retainer clips, a hydraulic cylinder with a housing and a tension piston, a press-fit device between the tension piston and the anchor holder front collet clamps with guide channels of the strands and a device for pressing and unpressing the rear collet clamps [1].

 However, when using the known device, it is difficult to control the accuracy of the required value of the tension of the beams from the strand reinforcement, and the known device requires a lot of time to perform auxiliary operations for pressing and unpressing the rear collet clamps and passing the strands of the strand reinforcement through the device for beam tension.

 The technical result, which this technical solution is aimed at, is to increase the accuracy of compliance with the technological regime while reducing the time of auxiliary operations.

 The specified result is achieved due to the fact that the device for tensioning beams from the strand reinforcement of reinforced concrete structures, including a support, hydraulic drive, anchor and retainer clips, respectively located in the anchor and retainer clips front and rear collet clamps, a hydraulic cylinder with a housing and a tension piston, located between with a tension piston and an anchor clip, the device for pressing in the front collet clamps with the guide channels of the strands and the device for pressing in and pressing out the rear collet clamps, is equipped with but placed between the housing and the anchor yoke beams voltage sensor, and the locking clip is fixed on the tension piston.

 The device is also equipped with retractable guide tubes located in the directing channels of the strands of the front collet pressing device, and its device for pressing and extruding the rear collet clips is made in the form of an additional piston fixed to the piston of tension, mounted movably relative to the housing tension piston with a stop, and connected with the additional housing a pusher, and the additional housing and piston form the forward and reverse chambers, and the emphasis of the additional housing and sense Tel installed to interact respectively with front and rear ends of the rear collet.

 In FIG. 1 shows the inventive device, FIG. 2 - section along aa.

 A device for straining beams from strand reinforcement of reinforced concrete structures, includes a hydraulic actuator 1, anchor 2 and retainer 3 clips, respectively placed in the anchor 2 and retainer 3 holder, front 4 and rear 5 collet clamps of bundles 6 of strand reinforcement, a hydraulic cylinder with a housing 7, a tension piston 8, forming with the camera body a direct 9 and a reverse 10 stroke, located between the tension piston 8 and the anchor clip 2, a device for pressing in front collet clips 4 with guide channels of the strands, which can be made in Idea of the press-in piston 11, which forms a forward-running chamber 12 with the housing 7. The press-in piston 11 is made with the guide channels 13 of the strands and is arranged to interact with the front collet clamps 4. A locking clip 3 is installed in the tension piston 8.

 The device is equipped with a device for pressing and unpressing the rear collet clamps 5, made, for example, in the form of an additional piston 14 fastened to the tension piston 8, movably relative to the housing piston 15 with a stop 16, interacting with the rear end face of the retainer clip 3, and connected with the additional housing the pusher 17, installed with the possibility of interaction with the ends of the rear collet clamps 5. Additional housing 15 and the piston 14 form a chamber for mounting 18 and unpressing 19 of the rear collet imov. The housing 7 of the device is based on the anchor clip 2 through the sensor 20 of the beam voltage. In the guide channels 13 of the press-fit piston, retractable guide tubes 21 are placed. To control the voltage of the beams, a indicating device 22 is used.

 The device operates as follows.

 Anchor cage 2 is installed on the structure 23. Bundles 6 of the strand fittings are passed into the anchor cage 2. A collet clip 4 is put on each of the beams, which is held in the anchor cage in an unpressed state. Then, using a winch or other device (not shown), the hydraulic cylinder is brought to the structure, and bundles 6 are passed through the sliding guide tubes 21, guide channels 13 of the press fitting device, pusher 17 and collet clips 5 of the retainer clip 3. By applying pressure to the press fitting chamber 18 , by means of the stop 16 of the movable housing 15, the collet clips 5 are pressed in.

 Bunches 6 are tensioned to the desired value. The voltage in the beams is controlled by means of a indicating device 22 connected to the sensor 20. Then, by means of the press-in piston 11, collet clamps 4 are pressed in.

 By applying pressure to the extrusion chamber 19, by means of the pusher 17 of the movable housing 15, collet clamps 5 are extruded.

Thus, this technical solution will allow:
To increase the accuracy of compliance with the technological regime by increasing the accuracy of measuring voltage in the strands by placing a beam voltage sensor between the housing and the support and fixing the retainer clip on the tension piston.

 To reduce the time of auxiliary operations, especially when tensioning a large number of beams, by supplying the device with an additional piston fixed to the tension piston, a housing with a stop, and a pusher associated with the additional housing, by installing an emphasis of the additional housing and pusher with the possibility of interaction with the rear and front ends rear collet clamps, as well as due to the placement in the guide channels of the strands of the piston press-fit retractable guide tubes. This allows you to automate the spell and grip of the grip.

Literature
1. The patent of Germany N 2308216, MKI E 04 G 21/12, 74.

Claims (3)

 1. Device for straining beams from strand reinforcement of reinforced concrete structures, including a support, hydraulic actuator, anchor and retainer clips, front and rear collet clips, respectively, in the anchor and retainer clips, a hydraulic cylinder with a housing and a tension piston, located between the tension piston and the anchor holder mounting front collet clamps with guide channels of the strands and a device for pressing and unpressing the rear collet clamps, characterized in that it is provided arranged between the housing and the anchor clip with a beam voltage sensor, and the retainer clip is mounted on the tension piston.  2. A device for straining beams of strand reinforcement of reinforced concrete structures according to claim 1, characterized in that it is provided with retractable guide tubes located in the guide channels of the strands of the device for pressing in the front collet clamps.  3. A device for straining beams from strand reinforcement of reinforced concrete structures according to claim 1, characterized in that the device for pressing and unpressing the rear collet clamps is made in the form of an additional piston fixed to the piston, placed movably relative to the body tension piston with a stop, and associated with an additional the housing is a pusher, and the additional housing and the piston form the forward and reverse chambers, and the emphasis of the additional housing and the pusher are installed with the possibility of interaction with Responsibly with the rear and front ends of the rear collet clamps.

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