SU1399125A1 - Apparatus for heat treatment of ferroconcrete structures - Google Patents

Abstract

The invention relates to the production of building structures and products, mainly precast concrete in thermoforms, cassettes, and the like. The aim of the invention is to intensify heat exchange and increase the uniformity of heating products. The device for heat treatment of reinforced concrete structures consists of a thermal compartment of a thermoform with cavities formed by longitudinal and transverse ribs and an upper metal sheet. The bottom metal sheet seals the bottom of the steam compartment and provides for the collection of condensate in the water seal installed at the lowest points of the thermoform. A steam distribution comb with an ejector from the main steam line is connected through locking and regulating devices with steam discharge devices that can be used as nozzles, in the walls of which tangentially directed channels with screw thread are formed. 4 il. § (L s

Description

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The invention relates to the production of building structures and products, mainly precast concrete in thermoforms, cassettes, and the like.

The purpose of the invention is to intensify heat transfer and increase the uniformity of heating products.

Figure 1 shows the heat supply scheme of the device proposed; figure 2 - steam device; in fig. 3 shows section A-A in FIG. Fig. 4 is a diagram of the movement of steam flows in the cavity of the steam compartment.

The device comprises a thermoform I, having a steam compartment with cavities 2, formed by longitudinal 3 and transverse A ribs and upper metal sheet 5 of thermoform 1.

The bottom metal sheet 6 seals the bottom of the steam compartment and collects condensate in the hydraulic seal 7 installed in the lowest point of the thermoforme 1. Thermoform 1 also includes a steam distribution comb 8 with an ejector 9, communicating with the main steam line 10 through locking and regulating devices 11 nozzles 12 - with percussion devices 13, placed in the cavity 2 of the steam compartment of the thermoform I. Steam outlets 13 are made in the form of an equipped nozzle 12 with steam nozzle 1 in the walls of which Channels 15 located in one or several rows with screw thread 16 are tangentially directed to nozzle 12. Channels 15 can be made confused with diffuser with screw thread 16 on the diffuser part and also have different diameters.

The device works as follows.

The steam through the main steam line 10 through the ejector 9 enters in the required amount in the cavity 2 of the steam compartment of the thermoform 1, where the molded concrete products are located. Then, with the help of locking-regulating devices, 11 pairs of nozzles 12, starting from the most distant cavities 2, are fed into steam-exhaust devices 13 equipped with I 5 channels with screw thread 16. When pulled out of pressure 15, the steam acquires a vortex motion and rushes through the entire volume of the lanes 2 to the places of concentration of the mass of concrete, i.e. to the longitudinal 3 and transverse 4 edges of the thermoform 1 filled with concrete, giving out heat (due to the circulation of steam jets on the respective surfaces) and heating the upper metal sheet 5 of the thermoform 1 with a thin layer of concrete on it (due to the general ejector circulator vapor-air environment) The selection of steam parameters and areas of living sections of channels 15 of steam outlets 13 ensures uniform heating of the product with an unevenly distributed mass. Tangentially directed channels 15 in combination with the vortex movement of steam jets ensure removal of the condensate film from the internal surfaces of the cavities 2 of the thermoform 1 and thus provide, with continuous mutual mixing of these jets, better heat transfer from the vapor medium.

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Claims (1)

Invention Formula The device dp of heat treatment of reinforced concrete structures, including a steam compartment with cavities, a main steam line, a steam distribution comb with an ejector, steam discharge devices and a hydraulic lock, is characterized in that, in order to intensify heat exchange and increase the uniformity of heating of products, steam steam devices are located the cavity of the steam compartment and made in the form of nozzles, in the walls of which are formed tangentially directed to the nozzle channels with screw thread. 1 A A /four X oJ g / g / /, Lu Phi2.