SU1237445A1 - Apparatus for extrusion of tubular articles - Google Patents

Description

The invention relates to the manufacture of reinforced concrete conical hollow high-strength racks of power transmission towers and contact lines of electrified railways and can be used in construction and in the production of construction materials.

The aim of the invention is to provide the possibility of manufacturing long conical products.

Fig. 1 shows a device for pressing tubular products prior to pressing; Fig. 2 is the same after pressing; on fig.Z - core, cross section; Fig. 4 shows the core seals in the armature carcass caps; figure 5 - jack with the cable-shaped elements of the form; Fig. 6 illustrates a removable mechanism for rotating the core in the cavity of the product.

A device for pressing tubular products consists of a vertically movable core 1 and a vertical outer shape, connected by flanges 2. The shape contains several sections, each with its wall 3 and steam jacket 4, the flanges 5 and 6 of the shape are connected to radial-longitudinal ribs 7 of stiffness. The walls of the 3 sections are also supported by transverse ribs 8. The upper flange 5 is supported by channel bars 9. In the ribs 7 and 8, holes are made for the passage of steam from the top downwards along a helical line. On the cross member 10 on the bottom flange 6, the end of the core is supported before pressing. The armature has an upper 11 and lower 12 caps.

The core 1 consists of an axial thick-walled tube 13, to which the radial ribs 14 are attached, the joint ш, на is not near the lower end of the core, and the diaphragm 15 with openings for the passage of steam and water enclosed in a conical shell 16. Its outer side should be very smooth.

In the caps 1 and 12, the reinforcement cage consists of a hose 17 with air or pressurized water held in the groove of caps II and 12 by rings 18 and 19 made of durable rubber, which they allow to stretch.

The jack 20 is suspended from the transport trolley on chains x 21. In the cylinder of the jack with the cover 22 there is a piston with a rod 23, sealed with the cuff 24. The cylinder 21 is made with legs 25 on which the frame 26 is fixed, bearing

five

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five

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You are 27 with beams 28. The end of the rod 23 is provided with a spherical protrusion 29, with which the depression in the tip 30 is aligned.

The removable mechanism for rotating the core has a second stage worm gear shaft 32 protruding from the housing 31, a matching worm gear 34, and a wheel 35 sitting on its shaft engages a screw screw 36 connected via a coupling with a reversing electric motor 37. The housing 31 has feet 38.

The device works as follows.

The armature is lowered into the cleaned and oiled vertical outer mold and the lower armature cover 12 is secured with the keys. Armor frame tensioned. The crossmember 10 is fixed. A vertically movable core 1 is immersed in a mold, resting it on the cross member 10. A hose of a concrete pump is attached to a hole in the lower part of the mold and the mold is filled with concrete mix with simultaneous action of vibrators on the mold.

The tip 30 is inserted into the core and the 2D jack is pointed at the axis of the core, the crossmember 10 is removed. Combine the protrusion 29 with a hollow in the tip. Cable-shaped elements 27 with beams 28 are deflected and brought under the channel bars 9 reinforcing the upper end of the form. Steam is fed into the jackets of the 4 forms and into the core 1. The oil is loaded onto the jack, its rod 23 slowly lowers together with the core, presses the mixture and squeezes out excess water from the mixture. It flows through the sewer. The 2D jack presses on the core 1 for some time after stopping the release of water from the mixture, and the steam in the jacket and in the core treats the concrete thermally.

Then the 2D jack is disconnected, its shafts are lifted, the cable elements 27 are pulled out from under the channels 9 and the jack is moved to another shape. Disable steam in the core and let cold water flow through it. A detachment mechanism for rotation of the latter is installed on the core by the end of the shaft 32, resting paws 38 into the walls of the mold. The core is rotated at a small angle clockwise and counterclockwise from the reversing electric motor 37 several times until it is separated from the surface of the product cavity. The core is removed from it and a steam coil is introduced into the cavity. Continue heat treatment. Then, a thermosamage of the product from the walls of the mold is carried out and removed from the mold by a hoist.

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Claims (2)

1. DEVICE FOR PRESSING TUBULAR PRODUCTS, containing a vertical outer shape, in the cavity of which along its longitudinal axis there is a vertically movable core with a hydraulic mechanism for its longitudinal movements, characterized in that, in order to enable the manufacture of long conical products, it is equipped with a removable rotation mechanism core, the hydraulic mechanism of the longitudinal displacements of the latter is made in the form of a jack, the shape is a composite of sections in contact with the ends, the diameter of the upper The end of each section exceeds the diameter of its lower end, the upper and lower bases of the external form are interconnected by cable-stayed elements, a removable core rotation mechanism is supported on the upper base of the form. 2. The device by π. 1, characterized in that the outer form is made with a steam jacket and perforation to drain excess water. fig 1