SU17969A1 - Lacquer Furnace Furnace of Metal Products - Google Patents

Description

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The present invention relates to furnaces for lacquering metal products by heating these furnaces with gas, which is supplied to the furnace space by means of metal burners with an adjustable air supply.

A complete and completely satisfactory threefold coating of metal products strongly heated from 275 to 400 ° C of metal products with varnish-fernise usually requires adherence to a number of specific operating conditions of the furnace. In this regard, in particular, the perfect uniformity of temperature (in all parts of the furnace chamber), the ability to change this temperature quickly and easily, the need to keep the furnace outlet open almost throughout the operation and at the same time keep high temperature in the working chamber, etc.:

In order to achieve the possible perfect temperature uniformity throughout the furnace chamber is independent); from its size; The burners in the proposed gas oven are located throughout the furnace hearth. At the same time, in order to prevent suction in the open furnace of cold air, front air. it has the appearance of a chamber equipped with lattice walls of bricks and burners with an independent regulator of air inflow into them and gdsa

In the schematic drawing of FIG. I depicts a top view of the hearth; FIG. 2 is a vertical section of the furnace in - / in FIG. 1; FIG. 3 - then ike, according to C D in FIG. one; FIG. 4 is a vertical section of the burner and FIG. 5 is horizontal, its resolution along P-5 in FIG. four.

The oven device is as follows. The hearth 1 of the furnace space 2 has a chamber 3, where a gas supply pipe 4 is installed, into which the burners 5 are screwed. Air in the latter comes from chamber 3. To prevent the cold air from being drawn into the furnace and protecting it from cooling The burners 5 are enclosed in washers b (Fig. 4), pressed by rams 6a from the bottom to the hearth 1. The grid 7 of each burner 5 enters the chamber 2 of the furnace through the 8 holes located in the hearth, placed in a checkerboard pattern throughout the hearth of the furnace. To regulate the air required for the flow of air into the burner 5, there is a cup 9, which, when rotated to one side or the other, its openings 9a are disconnected from or opened in the bushing 10.

depending on the required amount of air. Fastened to the outer ring 15, the inner gas pipe 16 (Fig. 4) with a screw 17 and plugs 10 of the burners 5 serve to better mix air with gas and are provided with radial slots 11. The gas inflow to the burners is controlled by means of gas in the gas supply tube ( Fig. 4) a valve1 19 connected by a common rod 20 with an adjustment knob 20a at its other end. In order to protect the furnace from cooling in the open position of its door and to maintain a uniform temperature in its front part, it is installed at the entrance with a closer, than burners 5a, arrangement of the burner 5a and with their independent inclusion into the gas supply pipe. To give the air flowing to the furnace space 2, heated to the desired temperature, in the correct direction; the burners 5a, the latter are enclosed in the chamber 13, whose inner wall 13a, which is in direct contact with the furnace space, is laid out in the form of a lattice, of bricks laid, flat, and the outer wall 136 is also made of bricks, resiliently laid on the edge, with how both of these walls overlap with a cast iron solid board 138 (Fig. 2). Thus, by placing burners 5a in chamber 13 and uniformly towards the back of the furnace space 2, slope upward of the roof 14, cold, inward, the entrance through the slots of the wall 136 and being heated to the required temperature, "preferably up to 350 ° C, is sucked through the slots of the wall 13a into the furnace space 2. From the latter, in the form of a waste, it goes back through the roof 14, as shown by the arrows in FIG. 2, into the exhaust, and a pipe 12 with a slider for regulating the amount of waste products of combustion and gas.

The described gas furnace operates as follows. The preheating of the furnace, as well as the necessary heating of the metal products 21 to a certain temperature before the first coating with fernise, takes place with the help of a gas supply pipe with burners 5. The next cycle, i.e. The first, second and third coating of the products with an fernise and then drying them in a furnace occurs by switching on the burners 5a, at which point the burners 5 turn off completely or with their own valves 19 and open up for the gas in pipe 4 to a small extent. necessary and not harmful for the conduct of the process of fire. The burners are lit. 5 and 5a, as usual, from separate gas pipes 18 (Figs. 1, 2 and 4), having small, continuous-fired burners that exit into wells 8 under the grid and freely ignite the gas when it leaves the burners by turning them on valve 19 into the pipe 4.

; The subject of the patent.

1. Furnace for varnishing-ferniz metal products, heated by gas supplied into the furnace space through metal burners with adjustable air supply, characterized in that the burners communicated with a common gas supply pipe are placed throughout the furnace hearth and that In order to prevent cold air from being sucked into an open furnace, the front of the furnace is arranged in the form of a chamber 13, provided with lattice walls 13a and 135 and burners 5a.

2. In the furnace mentioned in paragraph 1, use conventional flue gas tubes 18, which give constant fire, installed at each burner, and valves 19, connected by a common rod 20 for simultaneous control of the gas inflow.