CN218050305U - Cover for baking bag - Google Patents

Abstract

The utility model discloses a cover for baking and covering a bag. This be built by contract includes steel construction and refractory material layer, the steel construction comprises barrel, steel pipe and the lower crown plate and the well crown plate that weld sealed together the air chamber, this air chamber intercommunication compressed air pipe. And an air inlet pipe which is uniformly distributed in an annular shape is arranged on the lower annular plate, and the air inlet pipe introduces air in the air cavity into the steel ladle. The middle ring plate is also provided with gas inlet pipes which are uniformly distributed in a ring shape, and the gas inlet pipes are communicated with the gas pipes through gas ring pipes to introduce the gas into the steel ladle. The gas inlet pipe is inserted into the air inlet pipe, and the gas and the air are mixed and combusted, so that the baking efficiency is improved. The refractory material layer is positioned on the lower surface of the lower annular plate and the inner surface of the steel pipe, high-temperature gas and the steel structure are isolated and baked, and the high-temperature refractory material layer can preheat air in the air cavity and the air inlet pipe. The utility model discloses seal the ladle and toast, high temperature tail gas is concentrated by the tail gas pipeline and is taken away and recycle, the energy saving.

Description

Cover for baking bag

Technical Field

The utility model discloses be applied to the casting trade, relate to the ladle and toast, specifically be a be used for ladle to toast the be built by contract.

Background

In the casting industry, ladle baking is a necessary process flow, a new ladle needs to bake and evaporate moisture and crystal water in a ladle refractory material, a used ladle needs to be baked to a high temperature, the phenomenon that molten metal is seriously cooled, particularly the pouring of a steel casting, the ladle baking is poor, the pouring temperature of molten steel cannot be guaranteed, frozen steel can be formed in the ladle, the trouble is brought to ladle cleaning, and a ladle refractory material layer is scrapped when the temperature is serious.

The ladle baking is realized by introducing a heat source from a ladle opening or by adopting a special baking device. Publication number CN110918959a discloses a ladle roaster, which adds a heat-insulating layer, adopts a special burner, and utilizes the residual heat of a ladle cover during roasting to heat air. The exhaust inlet of the lower ladle cover is pulled by the gas pressure to generate negative pressure, external air is automatically sucked into the interlayer channel of the ladle cover, and the external air and the gas are fully mixed and combusted in the burner after being preheated. The publication number CN201500778U provides a steel ladle baking device, an air preheating device is arranged on a ladle cover, a burner is arranged at the bottom of the ladle cover, the burner is communicated with a gas pipe and the air preheating pipe, and hot air and gas are mixed and combusted, so that the baking effect is ensured. The notice number CN213317646U discloses a fire-resistant roaster ladle cover, which comprises an outer frame component and fire-resistant cotton, wherein the fire-resistant cotton is integrated with the outer frame component through F-shaped high-temperature-resistant steel nails, and the ladle cover has no roasting function and has a good heat insulation function. Publication number CN112944344a provides an oxygen jet multistage dispersion combustion roaster, a metal structure burner with a four-layer sleeve structure is arranged in the center of a ladle cover, a primary compressed air channel, a primary coal gas channel, a secondary combustion air channel and a secondary coal gas channel are respectively arranged from inside to outside, an oxygen jet orifice is fixed outside the metal structure burner, and oxygen high-speed jet flow is utilized to strengthen the bottom heating of a ladle and reduce the temperature difference between the top and the bottom of the ladle. Publication number CN203330390U discloses a ladle baking device, a central baking device is arranged in the center of a ladle cover, central burners are arranged in the center of the central baking device, peripheral burners are uniformly distributed around the central burners, and the peripheral burners are located in the central baking device. The disadvantage of the above patent application is that the utilization of the waste heat of the high temperature tail gas of the baking bag is not considered. Publication No. CN211135509U discloses a ladle baking device, wherein a heat storage box is arranged on a heat storage ladle cover, baking tail gas and cold air exchange heat in the heat storage box, and the air is heated and then sprayed out from a burner together with coal gas for combustion to bake a ladle.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be: the baking bag cover is used for sealing the baking bag, and concentrated high-temperature tail gas is pumped away to realize waste heat utilization.

The utility model adopts the technical proposal that: it includes steel construction and refractory material layer to bake chartered plane, the steel construction includes the barrel in the outside, the steel pipe at center and welds the sealing connection the lower crown plate and the middle crown plate of barrel and steel pipe, the cavity that above-mentioned parts formed is the air chamber, this air chamber intercommunication compressed air pipe. And the lower annular plate is provided with air inlet pipes which are uniformly distributed in an annular manner, and the air inlet pipes are communicated with an air cavity. The middle ring plate is provided with gas inlet pipes which are uniformly distributed in an annular mode, the gas inlet pipes are inserted into the air inlet pipes and are communicated with the gas pipes through gas ring pipes.

Furthermore, the refractory material layer is positioned on the lower surface of the lower ring plate and the inner surface of the steel pipe, and the high-temperature gas and the steel structure are isolated and baked, so that the steel structure is protected. When the steel ladle is baked, the red refractory material layer can preheat the air in the air cavity and the air inlet pipe, and the full combustion of coal gas is facilitated.

Furthermore, a lifting claw is fixed on the lower surface of the lower ring plate, and the lifting claw is in an inverted Y shape, an inverted L shape, an inverted T shape or an inverted 6 shape. The inner surface of the steel pipe is fixed with a fixed block, and the fixed block is a flat plate, a threaded steel head or an angle steel head. The lifting claw and the fixing block enable the refractory material and the structural member to be integrated.

Further, the gas pipe is provided with a three-way pipe fitting which is respectively communicated with the gas main pipe and the nitrogen pipe. The nitrogen pipe is mainly used for purging the gas pipe.

Furthermore, a conical cap corresponding to the upper cover body is arranged at an outlet at the upper end of the steel pipe, and the conical cap and the cover body are matched and sealed.

Furthermore, the gas ring pipe is replaced by an upper ring plate, the upper ring plate is welded and sealed on the upper part of the middle ring plate and connected with the cylinder and the steel pipe to form a gas cavity, and the gas inlet pipe and the gas pipe are communicated with the gas cavity.

Furthermore, to facilitate hoisting of the ladle cover, rib plates which are uniformly distributed on the circumference are welded on the steel plate at the top of the ladle cover, and the rib plates are symmetrically welded with hoisting rings.

The utility model has the advantages that: the utility model discloses seal the ladle and toast, concentrate high temperature tail gas and recycle, the energy saving accomplishes the waste heat and recycles.

Drawings

FIG. 1 is a schematic front view of the structure of embodiment 1;

FIG. 2 is a schematic front view of the structure of embodiment 2;

FIG. 3 is a schematic front view showing the structure of embodiment 3;

FIG. 4 is a schematic top view of the structure of FIG. 3;

FIG. 5 is a schematic view of the usage of the present invention;

reference numerals: 1-steel ladle, 2-refractory material, 3-cylinder, 4-lower ring plate, 5-air cavity, 6-middle ring plate, 7-coal gas cavity, 8-upper ring plate, 9-rib plate, 10-cover body, 11-outlet, 12-steel tube, 13-lifting ring, 14-coal gas valve, 15-coal gas tube, 16-compressed air tube, 17-air valve, 18-lifting claw, 19-air inlet tube, 20-coal gas inlet tube, 21-fixed block, 22-refractory cotton, 23-conical cap and 24-coal gas annular tube.

Detailed Description

The following upper and lower parts refer to the state of the present invention, i.e., the upper and lower relative positions of the drawings. The inner and outer portions are closer to the center than to the center of the bag cover, and farther from the center than to the center. The following mounting, arranging and connecting means fixed connection, which may be welding, or fastening means or other fixed connection means, unless otherwise specified.

Example 1.

The structure of the baking bag cover of the embodiment is shown in figure 1, and the arrows in the figure indicate the flowing direction of the gas. The ladle cover comprises a steel structure and a refractory material layer, wherein the steel structure comprises a barrel body 3, a lower ring plate 4, a middle ring plate 6, an upper ring plate 8, a steel pipe 12 and the like. The cylinder 3 is positioned on the outer side of the ladle cover, the steel pipe 12 is positioned in the center of the ladle cover, the upper ring plate 8, the middle ring plate 6 and the lower ring plate 4 are respectively welded with the cylinder 3 and the steel pipe 12 in a sealing mode, a coal gas cavity 7 is formed between the upper ring plate 8 and the middle ring plate 6, the coal gas cavity 7 is communicated with a coal gas pipe 15 through a coal gas valve 14, and a three-way pipe fitting is arranged on the coal gas pipe 15 and is respectively communicated with a coal gas main pipe and a nitrogen gas pipe. An air cavity 5 is formed between the middle annular plate 6 and the lower annular plate 4, and the air cavity 5 is communicated with a compressed air pipe 16 through an air valve 17. The circular holes are uniformly distributed in an annular mode and processed on the lower ring plate 4, the circular holes are welded and sealed with air inlet pipes 19, the air inlet pipes 19 are communicated with the air cavity 5, and compressed air can be introduced into a steel ladle. The middle ring plate 6 is also provided with circular and evenly distributed round holes, the round holes are welded and sealed with a gas inlet pipe 20, the gas inlet pipe 20 is communicated with a gas cavity 7, and gas is introduced into the steel ladle. The gas inlet pipe 20 is inserted into the air inlet pipe 19, and the gas can be quickly mixed with the air when entering the ladle. On the steel sheet at the ladle cover top, namely the upper surface of upper ring plate 8, for the convenience handling, weld the gusset 9 of a plurality of circumference equipartitions, strengthen upper ring plate 8, symmetrical welding rings 13 on gusset 9, see figure 4.

The refractory material layer mainly refers to the refractory materials 2 distributed on the lower surface of the lower ring plate 4 and the inner surface of the steel pipe 12, and the refractory materials 2 are used for isolating high-temperature gas from the steel structure, so that the steel structure is protected, the steel structure is prevented from being heated and deformed or oxidized, and the service life of the ladle cover is prolonged. In order to reduce the cost of the refractory materials and facilitate the manufacture of the refractory material layer, knotted refractory materials are mostly adopted in the refractory material layer. In order to prevent the refractory from falling off, the hanging claws 18 are fixed to the lower surface of the lower ring plate 4, and the fixing blocks 21 are fixed to the inner surface of the steel pipe 12. The lifting claw 18 can be in an inverted Y shape, an inverted L shape, an inverted T shape, an inverted 6 shape and the like, and the fixed block 21 can be a flat plate block, a threaded steel head, an angle steel head and the like. The hanging claws 18 and the fixing blocks 21 integrate the refractory 2 with the lower ring plate 4 and the steel pipe 12.

When the ladle is baked, the ladle 1 is hung to a ladle baking station, then the ladle baking cover is hung above a ladle opening of the ladle, the gas valve 14 is opened, gas is ignited at the lower end of the gas inlet pipe 20, then the air valve 17 is opened, and compressed air wraps the gas at the lower end of the compressed air pipe 16, so that the gas and the air can be quickly mixed, and a combustion supporting effect is achieved. The gas valve 14 and the air valve 17 are adjusted so that the gas is sufficiently burned. Then covering the steel ladle 1 by using a ladle cover, and feeding all the fire seedlings generated by gas combustion into the steel ladle 1 for ladle drying. And finally, rotating or descending the cover body 10 at the ladle drying station to the position above the ladle cover outlet 11, wherein the cover body 10 is communicated with a tail gas pipeline provided with a high-temperature resistant exhaust fan. The height between the cover body 10 and the outlet 11 is adjusted, so that the amount of cold air pumped into the tail gas pipeline can be adjusted, and the temperature of the tail gas of the baking bag in the tail gas pipeline can be adjusted.

The air chamber 5 of this embodiment is under, and the coal gas chamber is last, and air chamber 5 and refractory 2 contact, and when the temperature rise of refractory 2, accessible lower crown plate 4 and compressed air pipe 16 conduct heat for the air in air chamber 5 and the compressed air pipe 16, increase the air temperature, are favorable to the combustion-supporting of coal gas, improve the baking efficiency of ladle. Meanwhile, it can also be understood that the passing cold air helps to cool the high-temperature refractory 2 so that the refractory 2 is consistently in a high-strength state.

High temperature tail gas in the tail gas pipeline can send into the alloy feed bin and be used for toasting of alloy dry, also can send into workshop heating system and be used for the workshop heating, perhaps sends into the intensification that the workshop bathhouse is used for the bath water, also can send into the station that sprays paint, in a word, the utility model discloses can realize high temperature tail gas's heat and recycle, the energy saving.

Example 2.

For stations with far residual heat transmission or baking stations with high temperature, such as casting slow cooling pits or tempering furnaces, in order to prevent heat loss, as shown in figure 2, refractory cotton 22 is stuffed in the position where the ladle cover covers the ladle opening of the ladle, so that the blowing-out of high-temperature tail gas is avoided. A sealing conical cap 23 is arranged at the upper end of the outlet 11 of the steel pipe, the conical cap 23 corresponds to the cover body 10, and when the cover body 10 descends to be in contact with the conical cap 23, conical sealing is formed, so that cold air can be prevented from entering a tail gas pipeline, and the high temperature of the package drying tail gas can be kept.

Example 3.

The ladle cover in the embodiment 1 is provided with a coal gas cavity 7, when coal gas is ignited before baking the ladle, a three-way pipe fitting arranged on a coal gas pipe 15 is adopted, nitrogen is introduced for cleaning, air in the coal gas cavity 7 is cleaned, and the condition that the fed coal gas is ignited and is exploded is avoided. This operation is not cumbersome and dangerous. For this reason, the structure of embodiment 1 is modified as shown in fig. 3 and 4. The gas cavity 7 is removed and changed into a gas ring pipe 24, and the gas ring pipe 24 is fixed on the rib plate 9 and communicated with a gas pipe 15 and a gas inlet pipe 20. The structure can directly ignite coal gas without nitrogen purging, and is safe and simple. Rib plates 9 which are uniformly distributed on the circumference are welded on a steel plate at the top of the ladle cover, namely the upper surface of the middle ring plate 6, and hanging rings 13 are symmetrically welded on the rib plates 9.

Figure 5 is only the explanation the utility model discloses another usage, at the exhaust duct upper shed, with the movable plate shutoff, through adjusting movable plate's opening degree, the cold air volume that the adjustment got into exhaust duct realizes the regulation to exhaust duct internal tail gas temperature.

The utility model discloses can realize the closure of ladle and toast, concentrate high temperature tail gas and recycle, the energy saving is reducing carbon emission's current, and the economic benefits and the social of production are obvious.

The applicant starts to adopt the structure of the embodiment 1, removes the upper ring plate 8, changes the structure of the embodiment 3 by adding the gas ring pipe 24, adds the conical cap 23 of the embodiment 2, and adopts the automatic monitoring technology to control the opening degree of the movable plate on the tail gas pipeline and control the temperature of the tail gas. The collected tail gas is used for alloy baking, or furnace charge baking of an intermediate frequency furnace, or preheating of a slow cooling pit, or bathing in a workshop, so that the fuel power cost is saved, and the labor condition is improved.

Claims (7)

1. The utility model provides a dry by fire a packet flap, includes steel construction and refractory material layer, its characterized in that: the steel structure comprises a cylinder body (3) at the outer side, a steel pipe (12) at the center, and a lower annular plate (4) and an intermediate annular plate (6) which are welded and sealed to connect the cylinder body (3) and the steel pipe (12), the components form an air cavity (5), and the air cavity (5) is communicated with a compressed air pipe (16); the lower annular plate (4) is provided with air inlet pipes (19) which are uniformly distributed in an annular manner, and the air inlet pipes (19) are communicated with the air cavity (5); the middle ring plate (6) is provided with gas inlet pipes (20) which are uniformly distributed in a ring shape, the gas inlet pipes (20) are inserted into the air inlet pipe (19) and are communicated with the gas pipe (15) through a gas ring pipe (24).

2. A bakery cover according to claim 1, characterized in that: the refractory material layer is positioned on the lower surface of the lower ring plate (4) and the inner surface of the steel pipe (12) and used for isolating and baking high-temperature gas and the steel structure.

3. A bakery cover according to claim 2, characterized in that: a lifting claw (18) is fixed on the lower surface of the lower ring plate (4), and the shape of the lifting claw (18) is an inverted Y shape, an inverted L shape, an inverted T shape or an inverted 6 shape; the inner surface of the steel pipe (12) is fixedly provided with a fixed block (21), and the fixed block (21) is a flat plate, a threaded steel head or an angle steel head.

4. A bakery cover according to claim 1, characterized in that: the gas pipe (15) is provided with a three-way pipe which is respectively communicated with the gas main pipe and the nitrogen pipe.

5. A bakery cover according to claim 1, characterized in that: and a conical cap (23) corresponding to the upper cover body (10) is arranged at an outlet (11) at the upper end of the steel pipe (12).

6. A bakery cover according to claim 1, characterized in that: the gas ring pipe (24) is replaced by an upper ring plate (8), the upper ring plate (8) is welded and connected with the cylinder body (3) and the steel pipe (12) on the upper part of the middle ring plate (6) to form a gas cavity (7), and the gas inlet pipe (20) and the gas pipe (15) are communicated with the gas cavity (7).

7. A bakery cover according to claim 1 or 6, characterized in that: rib plates (9) which are uniformly distributed on the circumference are welded on the steel plate at the top of the ladle cover, and hanging rings (13) are symmetrically welded on the rib plates (9).

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