Device for tensioning reinforcement


(57) Abstract:

The invention relates to construction and is intended for the manufacture of prestressed concrete products. The device consists of a cylinder with the rod, which is semi-automatic clamp. The hydraulic cylinder is connected with the stop-guides, resisting the seizure of the valve. Point blank-guides placed punch, interacting through a compression spring with wedges capture and sponges semi-automatic clamp. Semi-automatic clamp, moving with the rod from the base plate, captures the armature carries her and pulls. For anchoring the valve taut punch under the influence of the compression force of the spring supressive wedges into the sleeve grip. Cylinder with end guides, moving from the base plate, the punch reveal sponge semi-automatic clamp and the device is removed from the valve. 3 Il.

The invention relates to the construction and designed for manufacturing korotkomernyh prestressed concrete products in pipeline and flow-aggregation methods for their production.

A device for tensioning reinforcement, including hydrohealth is that forming a compound, keeping it separate from not combining each of the other nodes, each of which performs only the function of gidrotartrat, yoke, bearing with guide rods. This design decision leads to an increase in size, weight, complexity of the installation process. For installation and tensioning forms and pallets require conversion and installation of additional supports under the traverse rod. To connect a device with a pull-up element (valve) uses a special anchoring sleeve attached at its end, and a capture complex design. After anchoring with stretched element (valve) and tension fixation of the valve is carried out using pads installed under the anchor sleeve.

It is also known a device for tensioning reinforcement, including the body of the hydraulic cylinder with a rod gripper with self-locking jaws and the locking nut [2].

The disadvantage of this device is the design complexity of the engagement, having an external thread for sleeve, the locking taut armature. The rod has a through groove, i.e., bifurcated fork tip. Such a decision device leads to a reduction of service life, increase trudelle valve, including the emphasis made in the form of guides, a power cylinder and two semi-automatic clamp, one of which is the rod of the hydraulic cylinder and is designed to capture the reinforcement in tension, the second is the emphasis at the entrance of the valve in the device and serves for anchoring reinforcement and fixing it taut.

The disadvantage of this device is that for anchoring rebar in tension using a sophisticated and expensive semi-automatic clamp. Due to the remoteness of one clip from another flow valves increases as a piece of rebar needed for gripping and tensioning, trimmed and goes to waste.

The technical problem of the invention is to simplify the design of the device, the use of capture simple design with possibility of simultaneous anchoring to the fitting and fixing her taut without additional operations, as well as the exclusion or reduction of the waste valve, formed after the tension and excluding the changeover Park forms.

The problem is solved in such a way that the device for tensioning the valve containing the cylinder with the rod and poloautomaticke the surrounding springs with hydraulic poisona, located in the stop-guide interoperable with semi-automatic clamp and gripper fittings, made in the form of a sleeve with clamping wedges, while another guides placed in the focus of the capture sleeve valve.

The proposed device is different from the known fact that it has connected through a compression spring with hydraulic punch located at the end of the guides, with the possibility of interaction with semi-automatic clamp and grip the valve that allows the use of grips reinforcement in the form of a sleeve with clamping wedges, and place a stop-guides-blank sleeve grip, resulting in no readjustment of the Park forms and pallets to install special stops and ensures the fixation of the valve after the tension without the use of additional devices.

The offset of the semi-automatic clamp, located in the rod of the hydraulic cylinder, the rod end side of the grip reinforcement reduces waste valve, which is formed after the tension.

In Fig.1 shows a device for tensioning the valve when it is installed on the valve; Fig.2 is the same, in the process of tension reinforcement; Fig.3 - the same, with the liberation of the 2, having a penetration hole in which is located a semi-automatic clip 3. With the hydraulic cylinder 1 are connected to the end rails 4, which abuts the grip 5, made in the form of a sleeve 6 and pins 7. In the end rails 4 posted by the punch 8, communicating via the compression spring 9 on the one hand with the wedges 7 grips 5, and on the other with sponges semi-automatic clamp 3.

The device operates as follows.

The valve 10 is put on the grip 5 and rests in the base plate II. Then to the valve 10 and the grip 5 wear the device so that the end of the armature 10 has entered the semi-automatic clamp 3, is fixed in the stem 2 of the cylinder 1 and the fence-rails 4 ran into the sleeve 6 capture 5 (Fig.1). Through the nozzle 12 into the cavity of the cylinder 1 serves the oil. The rod 2 is moved from the base plate II together with semi-automatic clamp 3, getting jammed it and dragging the valve (Fig. 2). In this direction of movement of the wedges 7 capture 5 reveals, passing through the valve 10. After pulling (tension) of the valve 10 to a predetermined length stops the oil flow through the nozzle 12. Wedges 7 capture 5 compression spring 9 through the punch 8 closes the valve 10, Ankara and locking her in a tight SOS is t base plate II and capture 5 (Fig.3). Emphasis-guides 4 rest against the punch 8, moving it to semi-automatic clamp 3, and, resting on the jaws of the clamp, reveal them, freeing the device from the valve 10. After that, the device is removed from stretched and fixed fittings.

Sources of information taken into account when compiling

1. USSR author's certificate 863817, class E 04 G 21/12, BI N 34, 1981.

2. USSR author's certificate 1165761, class E 04 G 21/12, B. I. N 25, 1985.

3. USSR author's certificate 444868, class E 04 G 21/12, B. I. N 36, 1974 (prototype).

Device for tensioning the valve containing the cylinder with the rod and semi-automatic clamp and fence-rails placed in them by the seizure of the valve, characterized in that it is provided by the United compressive springs with hydraulic cylinder, a plunger located in the stop-guide interoperable with semi-automatic clamp and gripper fittings, made in the form of a sleeve with clamping wedges, while another guides placed in the focus of the capture sleeve valve.


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SUBSTANCE: drum around which wire for fastening reinforcing rods is wound is mounted in shaft arranged in housing. Annular recess is formed along edge of opening of housing. Diameter of said recess exceeds that of lower part of housing. At side of opening of housing drum has flange arranged in said annular recess. On inner peripheral surface of opening of drum boss there is dent for preventing drum separation from its mounting shaft. On outer edge surface of shaft there is mounting recess for engaging dent.

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