SU727600A1 - Device for thermal treatment of large-diameter ferroconcrete tubular articles - Google Patents

Description

one

FIELD: production. It can be used for heat treatment of tubular products.

A device for the heat treatment of hollow concrete and reinforced concrete products, containing an open magnetic wire with a winding 1,

The closest to the described

The technical essence of the invention, the achieved result is a device for heat treatment of reinforced concrete tubular products of large diameter, including a telescopic induction heater in the form of a magnetic core with windings 2,

However, in the known devices, ish one-sided heating from the outside of the form, they are difficult to manufacture and during operation, especially when heat-treating large diameter pipes (1000 mm),

. „...- The purpose of the invention is to increase the intensity and uniformity of heating, to simplify the technology.

This goal is achieved by the fact that in the proposed Device for heat treatment of reinforced concrete tubular products of large diameter, I include a telescopic induction heater in the form of a magnetic duct with windings suspended on a U-shaped bracket made of a nonmagnetic material telescopically connected with it, the magnetic core is made of two symmetrical relatively walls of the product of telescopic cores with windings throughout

It is 0 long and equipped with upper and lower pivotal bridges connected by means of cables with the device lifting mechanism.

FIG. 1 gives the described device on a pipe, for example, vibro-hydropressed; FIG. 2 is a section A-A of FIG. 1; in fig. 3 - node I in FIG. 1 (with a tear); FIG. 4 20; and FIG. 1, (with cut); FIG. 5 - section bb of fig, 1.

Cores 1, 2 of electrical steel, telescopically interconnected and carrying winding 3 along their entire length, are suspended on a U-shaped bracket 4, Bracket 4 is telescopically connected with cores 1 and in working position

30 is not supported by a pipe.

Fixing the cores 1,2 against each other and on the bracket 4 is carried out with the help of locks Fixers 5, 6. The pivoting pins 7.8 in the working position are arranged horizontally, creating a closed loop of the magnetic circuit divided only by the wall of the product. Bottom pivoting bridges 8 with the help of cables 9 are connected with the lifting mechanism of the device. When the device is raised, the jumper 8 is set vertically along the cores 2. The jumpers 7 are rotated with the help of pushers when assembling the core telescope.

The principle of operation of the device is based on the law of electromagnetic induction, i-.e. induction of emf and current in krOtks13 amknutyh. with the main elements of the product (form, reinforcement, core, for example, vibro-hydro-pressed pipes) while penetrating the area limited by them by magnetic flux.

Thus, when using an induction device of this design, all steel elements in contact with the concrete act as heat generating elements and the products are accelerated by heating.

A device of this type can most effectively be used for heat treatment of pressure vibrohydropressed pipes, the concrete of which allows for accelerated high-temperature heating. The design of the device makes it possible to concentrate heat dissipation and heating on a definite cell, excluding short-circuited anchor rings from the magnetic flux coverage in the socket and in the hub part of the edelie. ;

The operation of the device is as follows.

The clamps 5 and 6 are installed so as to provide the required amount of separation of the cores 1 and 2 with the windings 3 relative to each other and relative to the bracket 4. The device in assembled form, suspended by means of cables 9 to the mechanism, such as a crane, is lowered onto the molded tubular product Yu,

727600

Moreover, one half of the device is inside, and the other outside the pipe. On the bracket 4, which rests on the shape of the product, cores 1.2 are suspended, which are installed and moved apart to a predetermined height of effective heating. With the full extension of the cores of the rotary jumper 7 and 8 is set in a horizontal position, completing the Q preparation of the magnetic circuit of the device. The windings 3 are supplied with voltage. I act according to H1, they create concentrated in the cores

1, 2 magnetic flux providing heat generation

5 in all short-circuited steel elements of the product at a given height. After warming up, the device is disconnected and lifted,

Bottom jumpers 8, connected

0 with cables 9, are rotated and assembled telescopically connected cores 1, 2 and bracket 4, the upper bridges 7 are rotated by means of pushers 11,

- - - - - ...; . -, .-. - -. h

Claims (1)

Invention Formula Heat Treatment Device - reinforced concrete. tubular products Large-diameter Q including a telescopic induction heater in the form of a magnetic circuit with windings, characterized in that, in order to increase the intensity and uniformity of heating, to simplify the technology, the magnetic circuit is suspended on a U-shaped bracket made of a nonmagnetic material telescopically connected with it from two symmetric with respect to the wall, the products of telescopic cores with windings along their entire length are provided with upper and lower rotary bridges connected by means of cables with a mechanism djema 5 devices. Sources of information taken by the HE in the examination 1, USSR Author's Certificate No. 283835, class, C 04 B 41/30, 1969, Q2. USSR author's certificate No. 462809, class, C 04 B 41/30, 1973 (prototype),