SU1638019A1 - Tunnel chamber - Google Patents

Abstract

The invention relates to the production of building materials and products, namely, devices for their heat treatment. The purpose of the invention is to reduce heat loss. The tunnel chamber contains a tunnel 1 formed by a base 2, walls 3 and an overlap 4 supported on them, which in the temperature rise zone above the first post has an opening 17. A variable volume chamber 18 is installed above the opening, made in the form of furs, compressed and uncompressed by a hydraulic cylinder 27 through the levers 26. The chamber 18 is covered with a hermetic cap 23, the closed space under which is connected by an air duct 32 to the ducts 33 of the thermal curtain 34 at the entrance to the chamber and the bottom of the tunnel 1 at the first post. The space between the base 2, the walls 3 and the bottom of the form-trolley 6 at the entrance and exit from the chamber is blocked by elastic diaphragms 15. 2 Cp f-ly, 7 ill.

Description

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The invention relates to the production of building materials and products, namely, devices for their heat treatment.

The purpose of the invention is to reduce heat loss,

1 shows a tunnel chamber, a longitudinal section; in figure 2. - type A in FIG. 1; 3-7 shows a tunnel chamber, a schematic diagram of the operation.

The tunnel chamber of the thermal-moisture treatment of concrete and reinforced concrete products includes conditionally divided zones of temperature increase, isothermal exposure and cooling of tunnel 1 formed by walls 3 supported on base 2 and ceiling 4. Rail tracks 5 are laid on base 2, along which cameras move from post to post forms-trolleys 6 with concrete and reinforced concrete products 7. At the ends 8, the chamber is equipped with curtain doors 9, which open for the passage of form-trolleys being rolled into it and pushed out of it 6. dix steam pipe 10 for supplying the heat medium therein, providing a predetermined temperature-humidity heat treatment regime product 7.

At the ends 8 of the chamber, pushers 11c are located outside its telescopic rods 12, designed to move along the form-carriage tunnel. Between the rail tracks 5 in the base 2 there are made grooves 13.14 for the passage of the rods 12. The space between the base 2, the walls 3 and the bottom of the form-trolley 6 at the entrance and exit of the chamber is blocked by elastic diaphragms 15 made of elastic elastic material, for example, rubberized conveyor belt. There are several rows of such diaphragms like a comb. Also, across the grooves 14, the same diaphragm 16 is installed, deviating downwards during the passage of the rod 12. The overlap 4 in the temperature increase zone above the first post is made with an opening 17. At its edge, the variable volume chamber 18 is installed on the overlap 4, made in the form of bellows, including a light rotary insulated shield 19 with a shaft 20 fixed on it and corrugated gas-tight walls 21 with a heater 22 of elastic material (for example, two layers of rubberized tape with an interlayer of foam rubber between them), seal They are articulated with shield 19 and overlapping 4 along the contour of opening 17. Chamber 18 is covered with an airtight cap 23, through which shaft 25 ends 25 supporting the bearings 24 and 20 levers 26 are articulated with shaft 19, which under the action of the driving cylinder 27 depresses and compresses the bellows in which the ropes 30, which are mounted on the brackets 28, with the counterweights 31 suspended on them, are fastened on them. The brackets 28 are mounted on the camera. A closed space under the hood 23 is connected by a duct 32 to the ducts 33 of the thermal curtain 34 at the entrance to the chamber and the bottom of the tunnel 1 at the first post. On duct 32, a switch 35 is installed, which overlaps the duct and communicates it to the thermal curtain 34, then to the bottom of the chamber.

The tunnel, the camera works as follows.

In the initial position, before entering the chamber of the next form-trolley 6 with freshly molded concrete or reinforced concrete product 7 and removing the product having undergone thermo-humidity treatment from the chamber, all posts in the chamber are filled with forms-trolleys 6, curtain doors 9 are closed, walls 21 of chamber 18 variable volume is compressed and its insulated shield 19 is located in a level with overlapping 4 chambers, switch 35 blocks the duct 32 and rods 12 of the pushers 11 are outside the chamber.

At the next movement of the carriage forms 6 through the chamber, the carriage form 6 is first removed from the cooling zone. For this, the telescopic rod 12, the pusher 11, at the chamber exit, is driven through the strobe 14 into the chamber and it captures the two extreme forms of the trolley 6. When moving along the strobe 14, the rod 12 deflects the diaphragm 16 down.

Then open the curtain door 9 at the exit of the chamber and at the same time move the two form-trolleys 6 by one pitch by the pusher 11.

The diaphragms 15, tightly clamped to the bottoms / and sides of the form-trolley 6, prevent the penetration of cold outside air into the chamber from below.

Through a narrow slot formed by the moving form-trolley 6 and the overlap 4 in the end 8 of the chamber, the outside air is sucked into the space created between the forms-trolleys 6 in their rupture. This flow, directed towards the inside of the chamber, prevents movement due to convection over the top of the hot vapor-air mixture from the isothermal holding zone through the cooling zone to the outlet of the chamber.

After moving the two form trolleys 6 to the exit step of the extreme chamber, the curtain doors 9 exit the chamber and the rod 12 pusher 11 at the entrance to the chamber with the doors 9 closed pushes the train of the form trolleys 6 one step closer to the shape of the trolley, standing at the exit of the chamber. At the same time, the vapor-air mixture from the isothermal holding zone is sucked into the vacant space at the first post due to the vacuum created there.

Then the rod 12 of the pusher 11 is returned to its original position. It captures the next form-trolley 6 received with heat treatment with a freshly molded product 7. The curtain doors 9 are opened at the entrance to the chamber and by turning the switch 35 they inform the air duct 32 coming from the cap 23 with the air curtain 34. At the same time, by acting with the driving hydraulic cylinder 27, the levers 26 turn the shield 19 on the shaft 20 and the fur of the chamber 18 are diluted. The volume of this chamber increases, the vapor-air mixture of the first and partially the second post rises and fills this volume.

With the counterbalance 31 suspended on the rope 30, a slight effort is expended to lift the shield 19, mainly to overcome the forces of friction and air resistance.

When breeding mechs, partially heated air from under cap 23 is displaced and, through duct 32 through duct 33, creates an air curtain at the entrance to the chamber and fills a volume in the temperature increase zone equal to chamber volume 18. Convective removal of hot air and air-vapor mixture opening 8 on top of the camera does not occur. The diaphragms 15 and 16 prevent the entry of cold air into the chamber from the outside.

Upon completion of pushing the trolley 6 into the tunnel chamber, the curtain doors 9 are closed and the walls 21 are compressed into variable volume chambers 18. Hot air and the vapor-air mixture are squeezed out of it under the ceiling 4, displaces partly and then into the duct 32 heated by the heat transfer fencing tunnel 1 air in the released volume under the cap 23, reported

switch 35 with tunnel 1.

Thus, when the proposed tunnel chamber is operated, heat removal from it along the ends is excluded.

In addition, in such a chamber, where the vapor-air mixture is constantly in contact at the first post with a heated ceiling, which in the proposed device serves as a variable-volume chamber shield, moisture is not condensed on it.

dropping drops onto a freshly molded and smoothed surface of concrete products. This additionally ensures the high quality of such products.

Claims (3)

Invention Formula 1, Tunnel chamber for heat and moisture treatment of concrete and reinforced concrete products with zones of temperature rise, isothermal exposure and cooling, including enclosing structures in the form of an overlap, supported on side walls mounted on the base, a rail track for moving form-carts and a steam line, characterized in that in order to reduce heat loss, it is equipped with a chamber in the form of bellows installed over the overlap of variable volume, mechanisms for their dilution and compression, and communicated through the overlap with the temperature rise zone, as well as elastic diaphragms located at the chamber inlet and outlet, blocking the gap between the enclosure of the chamber and the forms-trolleys. 2. A chamber according to claim 1, characterized in that the mechanism for breeding and compressing the bellows is made in the form of a lever system with a drive and a cable block system with counter-load. 3. The chamber according to claim 1, characterized in that the closed volume above the bellows is provided with an air duct with a switch that informs it alternately with a thermal curtain at the entrance to the chamber and the bottom of the chamber under the furs. 1638019 21 19 Qud A I v. "Ld-o -: -.-.- :: .. A. °. У .: Л о.;. hTKTV / V --J. About .. o / h oh, -. - OU.- - / S F J2 / f 16 FIG. g 23 18 I / T1 .g . 1.1 3x -Uzshz22 zonach / deputy helper a- iuvaiujcrnji- ipi UJU / itf / f / L U4Gb UU-JUflUn n temperament / chickens extract gfog.j cooling y g--: - | | aj | dTi and about od | about q / 75 9 23 -79 //  . .   about . . . - ".- -    -; 3x -U Y aj / g Fg / g7