CN217757545U

CN217757545U - Steel coil annealing furnace

Info

Publication number: CN217757545U
Application number: CN202220879612.2U
Authority: CN
Inventors: 恽建刚; 肖万林; 李观军; 裘旗威
Original assignee: Ningbo Yinyi Kechuang New Material Co ltd
Current assignee: Ningbo Yinyi Kechuang New Material Co ltd
Priority date: 2022-04-17
Filing date: 2022-04-17
Publication date: 2022-11-08
Anticipated expiration: 2032-04-17

Abstract

Coil of strip annealing stove, including stove top, inner cover and heating mantle, the inner cover sets up on the stove top, the heating mantle sets up the outer lane of inner cover, be provided with the heating resistor silk on the inner wall of heating mantle, the stove top portion has a convection plate, and the coil of strip sets up on the convection plate, be provided with the through-hole in the middle of the convection plate, still be provided with several on the convection plate and extend to from the edge the guiding gutter of through-hole, the stove top with be provided with protective gas in the enclosure space that the inner cover encloses. Before use, the steel coil is placed on the convection plate, then the inner cover is covered, and the heating cover is covered outside the inner cover, so that the equipment is assembled.

Description

Steel coil annealing furnace

Technical Field

The invention relates to a steel coil annealing furnace.

Background

The steel coil annealing furnace used at present refers to fig. 1 and comprises a heating cover 1, an inner cover 2 and a furnace platform 3, wherein the inner cover is arranged on the furnace platform, the heating cover 1 is arranged on an outer ring of the inner cover, a heating resistance wire is arranged on the furnace platform, and the heating resistance wire is also arranged on the inner wall of the heating cover. The top of the furnace platform is a furnace bottom plate.

When the annealing furnace is used, a steel coil needing annealing is arranged on the bottom plate of the furnace, the inner cover is hoisted to the furnace platform, and finally the heating cover is hoisted to the outer ring of the inner cover. And starting the heating resistance wire, heating the inner cover to red through the heating cover by means of thermal radiation, and heating the steel coil by the inner cover by means of thermal radiation. The furnace platform heats the bottom of the steel coil through a heating furnace bottom plate.

The steel coil annealing furnace with the structure has the biggest problem that the heating temperature of the heating resistance wire on the furnace platform is very high, so that the contact part of the bottom of a steel coil and a furnace bottom plate is easy to soften, the dead weight of the steel coil is very large, and the deformation of the bottom of the steel coil can be caused once the steel coil is softened, so that the edge quality of the steel coil is influenced. Another problem is that in order to make the heat generated by the resistance heater on the furnace platform be uniformly transferred to the bottom of the steel coil, the furnace bottom plate needs to be a steel plate with a height of more than 10cm, which greatly increases the cost, and therefore needs to be improved. In addition, two circles of heating resistance belts are arranged on the furnace platform, so that the furnace bottom plate is partially suspended, is locally stressed and is easy to deform, the loss of the furnace bottom plate is increased, and the bottom end quality of a steel coil is influenced.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the steel coil annealing furnace, the bottom of a steel coil cannot deform, and the cost is greatly reduced.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a coil of strip annealing furnace, includes stove top, inner cover and heating mantle, the inner cover sets up on the stove top the heating mantle sets up the outer lane of inner cover, be provided with the heating resistor silk on the inner wall of heating mantle, the stove top portion has a convection plate, and the coil of strip sets up on the convection plate, be provided with the through-hole in the middle of the convection plate, still be provided with several on the convection plate and extend to from the edge the guiding gutter of through-hole, the stove top with be provided with protective gas in the enclosure space that the inner cover encloses. Before use, the steel coil is placed on the convection plate, then the inner cover is covered, and the heating cover is covered outside the inner cover, so that the equipment is assembled. When the electric heating cover is in operation, the heating cover is electrified, and the inner cover is heated by the two heating resistance wires on the inner wall of the heating cover through heat radiation. The inner cover heats the top and the periphery of the steel coil by thermal radiation. Meanwhile, the protective gas in the inner cover is also heated, and the protective gas can transfer heat to the bottom of the steel coil through the diversion trench to heat the bottom of the steel coil. Compared with the prior art, the steel coil annealing furnace with the structure has the advantages that the heating resistance wire is removed from the bottom, so that a soaking steel plate is not needed, the structure is simplified, and the cost is greatly reduced. And because the bottom does not have the heating resistor silk, the coil of strip bottom temperature equals the temperature of protective gas at most, consequently also can not appear the bottom because the too high problem that causes the softening deformation of temperature. Meanwhile, the heating resistance wire is not required to be arranged on the furnace platform, so that the furnace platform does not have the problem of suspension and is not easy to deform.

Among the above-mentioned technical scheme, preferred, the convection current board includes the steel sheet, the top welding of steel sheet has several water conservancy diversion pieces, form between the water conservancy diversion piece the guiding gutter, the through-hole is located the steel sheet intermediate position.

In the above technical solution, preferably, there are two steel plates, and the flow guide block on the lower steel plate is tightly attached to the bottom of the upper steel plate. The two steel plates can realize double convection, so that the shielding gas can convect more conveniently.

In the above technical solution, preferably, the shielding gas is a nitrogen-hydrogen mixture, and the shielding gas is ignited after being led out from the heating cover by the drainage tube.

Among the above-mentioned technical scheme, preferred, still include an intake pipe, the intake pipe is used for charging into protective gas, the export of intake pipe is located through-hole department in the middle of the convection current board.

The utility model has the advantages that: compared with the prior art, the steel coil annealing furnace with the structure has the advantages that the heating resistance wire is removed from the bottom, so that a soaking steel plate is not needed, the structure is simplified, and the cost is greatly reduced. And because the bottom does not have the heating resistor silk, the coil of strip bottom temperature equals the temperature of protective gas at most, consequently also can not appear the bottom because the too high problem that causes the softening deformation of temperature.

Drawings

Fig. 1 is a schematic diagram of the present invention.

FIG. 2 is a schematic view of a convection plate.

Fig. 3 is a schematic view of an upper steel plate of the convection plate.

Fig. 4 is a schematic view of the lower steel plate of the convection plate.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

referring to fig. 1 to 4, the steel coil annealing furnace comprises a furnace platform 1, an inner cover 2 and a heating cover 3, wherein the inner cover 2 is arranged on the furnace platform 1, and the heating cover 3 is arranged on the outer ring of the inner cover 2.

The heating furnace is characterized in that heating resistance wires are arranged on the inner wall of the heating cover 3, a convection plate 4 is arranged at the top of the furnace platform 1, a steel coil is arranged on the convection plate 4, a through hole 4a is formed in the middle of the convection plate 4, and a plurality of flow guide grooves 4b extending from the edge to the through hole 4a are further formed in the convection plate 4.

In particular, the convection plate 4 comprises two

steel plates

41 and 42. Referring to fig. 3, 20 flow guide blocks 4c with the same shape and size are welded on the top surface of the steel plate 4 at the top, the flow guide blocks 4c are uniformly distributed along the circumferential direction of the steel plate 41, and the flow guide grooves 4b are formed between the flow guide blocks 4 c. The top of the steel plate 42 at the top is welded with 20 flow guide blocks 4c with the same shape and size, the flow guide blocks 4c are uniformly distributed along the circumferential direction of the steel plate 41, and the flow guide grooves 4b are formed between the flow guide blocks 4 c.

The top surface what function welding of steel sheet 42 that is located the below has 15 water conservancy diversion blocks 4d that the shape size is all the same, and water conservancy diversion block 4d is along steel sheet 42's circumference evenly distributed, form between the water conservancy diversion block 4d the guiding gutter 4b. The flow guide block 4d is closely attached to the bottom of the steel plate 41 located above. Two steel sheets can realize double convection, so that the protective gas can convect more conveniently.

And a closed space enclosed by the furnace platform 1 and the inner cover 2 is internally provided with protective gas. The protective gas is a nitrogen-hydrogen mixed gas, and the protective gas further comprises a drainage tube 5, wherein the drainage tube 5 is used for leading out the protective gas from the heating cover 3 and then igniting the protective gas.

The convection plate is characterized by further comprising an air inlet pipe 6, wherein the air inlet pipe 6 is used for filling protective gas, and an outlet of the air inlet pipe 6 is located at a through hole 4a in the middle of the convection plate 4.

Before use, the steel coil is placed on the convection plate, then the inner cover is covered, and the heating cover is covered outside the inner cover, so that the equipment is assembled. When the electric heating cover is in operation, the heating cover is electrified, and the inner cover is heated by the two heating resistance wires on the inner wall of the heating cover through heat radiation. The inner cover heats the top and the periphery of the steel coil by thermal radiation. Meanwhile, the protective gas in the inner cover is also heated, and the protective gas can transfer heat to the bottom of the steel coil through the diversion trench to heat the bottom of the steel coil. Compared with the prior art, the steel coil annealing furnace with the structure has the advantages that the heating resistance wire is removed from the bottom, so that a soaking steel plate is not needed, the structure is simplified, and the cost is greatly reduced. And because the bottom does not have the heating resistor silk, the coil of strip bottom temperature equals the temperature of protective gas at most, consequently also can not appear the bottom because the too high problem that causes the softening deformation of temperature.

Claims

1. Coil of strip annealing stove, including stove top, inner cover and heating mantle, the inner cover sets up on the stove top, the heating mantle sets up the outer lane of inner cover, be provided with heating resistor silk, its characterized in that on the inner wall of heating mantle: the furnace platform top has a convection plate, and the coil of strip sets up on the convection plate, be provided with the through-hole in the middle of the convection plate, still be provided with several on the convection plate and extend to from the edge the guiding gutter of through-hole, be provided with protective gas in the closed space that the furnace platform encloses with the inner cover.

2. The steel coil annealing furnace according to claim 1, wherein: the convection plate comprises a steel plate, a plurality of flow guide blocks are welded at the top of the steel plate, the flow guide grooves are formed between the flow guide blocks, and the through holes are located in the middle of the steel plate.

3. The steel coil annealing furnace according to claim 2, characterized in that: the number of the steel plates is two, and the flow guide blocks on the steel plates positioned below are tightly attached to the bottoms of the steel plates positioned above.

4. The steel coil annealing furnace according to claim 1, wherein: the protective gas is a nitrogen-hydrogen mixed gas, and the protective gas is ignited after being led out from the heating cover by the drainage tube.

5. The steel coil annealing furnace according to claim 1, wherein: the convection plate is characterized by further comprising an air inlet pipe, wherein the air inlet pipe is used for filling protective gas, and an outlet of the air inlet pipe is located at the through hole in the middle of the convection plate.