SU679554A1 - Steaming apparatus - Google Patents

Description

(54) PASSING DEVICE

The invention relates to paring production of reinforced concrete and concrete products, namely, devices dp steam-gas processing of concrete products in order to accelerate their hardening.

A steam device is known that includes a chamber of mist and a vertical collector pipe with Laval nozzles installed at the corners of the chamber. L

A disadvantage of this device is the small area of active mixing of the medium over the chamber area, as a result of which dead congestive zones are formed in the middle part of the chamber.

The closest technical solution to the invention is a steam device comprising a double chamber with pairwise and symmetrically arranged steam / emitting and suction collectors, connected respectively to supply and recycle pipelines and forming an ejection circulation system 2 ..

The drawback of the device is the large vapor pressure loss between the injector located in the outburst and the openings of the steam outlet pipe, the separation of the vapor-gas medium along the chamber width, since the perforated suction pipes and steam supply pipes are located at different heights on the same longitudinal wall of the chamber, the vapor-gas medium path in the chamber, near the longitudinal walls, in the space between the steamed products and the chamber body. The middle part of the chamber in which the bulk of the products is placed is a stagnant zone.

An increase in the number of exhaust and suction pipes on one wall further limits the volume of active vapor circulation.

The purpose of the invention is to increase the heating uniformity.

This is achieved by the fact that in a steaming device that includes a single chamber with pairs and symmetrically

arranged steam supply and suction collectors, connected respectively by the supply and recirculation pipelines, and defying the ejection circulation system, the steam suction collectors are fitted with gates and diffusers installed alternately, each with a steam supply manifold nozzle pipeline installed switch. At the same time, the steaming device is equipped with nozzles for installation on suction collectors. By this. An increase in the intensity of the circulation of nara is achieved throughout the entire volume of the steam chamber, between the products and in the blind holes of the products, thereby ensuring that the optimal conditions for the heat treatment of hardening concrete are strictly observed.

The drawing shows the proposed steaming device.

The steaming device includes a temporal chamber 1, a lid 2 with a water seal, the steam supply collectors 3 with steam discharge nozzles 4 are directed.

along the side walls of the chamber, the supply pipe 5, the return pipe 6 with a hydraulic lock capacitor, a steam supply switch 7 interlocked with the valves 8 holes 9 connecting the collectors of the steam pump to the chamber 1. The collectors 10 communicate with each other by a recirculation pipe 11. B openings 9 of the collectors 10 Insert the nozzles 12, the second ends of which establish between the DN of the blind holes of the products, and, if necessary, between the products.

For more massive products, nozzles 12 have certain dimensions; universal pipes are used for atypical parts, the length of which is determined by the deepest blind holes. The pipes 12 are made flexible. For longer, straight holes, the portion of the nozzle that enters the hole may be made of Plastic or other children Tubes.

The nozzles 4 of the steam supply manifolds are installed in the diffusers 13, the inlets for the low-pressure one, among which are connected to the headers Yu from the steam pump. In the steaming chambers of highly Exhaust products, the nozzles 4 and the ib collectors are installed at the end walls, with a greater number of holes 9 (with a total cross section of up to 12% of the total flow through all the holes in the end wall) are on the same line at the height of 30 -0 mm from the bottom of the chamber to the bottom edge of the holes. The holes with a total area of up to 7% are located on the upper line (at a distance of 30 mm-45 mm from cover 2 to the upper edge of the holes). Osal holes are distributed approximately uniformly over the area of the end wall of chamber 1, with an increase in their concentration in the areas of the gaps between the products. The system of automatic control of steam supply to the chamber and the ventilation system of the chamber during cooling Denin are not shown in the drawing.

Steaming device works in a short way.

With the open 1 flask 2, the chamber 1 is loaded with the items to be steamed so that between the lower product and the floor of the camera 1 is the distance 7О-ЮОмм, between the products mm, between the top product and the cover 5О-1ОО mm, the distance between the nozzles 4 and the products not 1OO mm. The steam is supplied, which by the switch 7 through the pipeline 5 is directed to the nozzles 4 of one of the collectors 3, while the openings 9 of the adjacent collector 1O are closed, the opposite of which is open. From the nozzles, 4 pairs are directed along the side walls to the opposite end wall of chamber 1. When the steam leaves the nozzles 4 in dp || Fusors: 13 tons of vacuum collector 1 O; which is transferred through the recirculation pipe 11 to the collector 10 on the opposite wall of chamber 1. In it through air openings 9 and nozzles 12 air is drawn in and cooled steam from the air outlets, as well as from gaps between the products, where the newly arrived hot steam.

After the chamber acquires an optimum temperature and holds for the calculated Time, the steam flow in chamber 1 is reversed by switch 7 and the shutters 8 interlocked with it, while the temperature and humidity regime of the chamber becomes more even.

After the steaming has finished, the products are neither cooled, the chamber is ventilated and discharged.

The advantage of the proposed installation is the creation of a more uniform temperature and safety regime.