Air uniformizing box device of color coating line curing oven

Abstract

The utility model provides an air distributing box device of a color coating line curing oven, which comprises an air box, an air inducing pipe and an air outlet arranged on the surface of the air box, and is characterized in that the air box is arranged in a prismatic table shape, and the air outlet is arranged on the larger upper bottom surface of the prismatic table. The air uniformizing box of the curing oven is arranged into the prismatic table shape from a cuboid, and the problem that air pressure at local positions of the edges is too large due to the fact that air flow in the box body impacts on the edges of the box body can be effectively solved. When hot air is conveyed into the air uniformizing box through the air inducing pipe, the vertical side face of the cuboid is changed into the trapezoid side face of the prismatic table, and the obtuse angle is formed between the trapezoid side face and the lower surface of the box body, so that hot air flow blown to the edge of the box body can be effectively guided and evacuated to the upper portion of the box body, and backflow is formed on the upper portion of the box body; therefore, hot air in the air uniformizing box is evenly blown out from the air outlet formed in the upper surface, and the problem that due to airflow collision, local air pressure is too large, and blowing of the air outlet is not uniform is solved.

Description

Technical Field

[0001] The utility model relates to a wind box purge device in a metal plate and strip color coating production line, in particular to a heat equalizing wind box purge device arranged on a curing furnace device in the color coating production line. Background Art

[0002] In the metal sheet and strip color coating production line, after the metal sheet and strip surface is painted with a color roller, the sheet and strip surface needs to be heated to air-dry and solidify the paint on its surface. The heating method currently used in the prior art is to introduce hot air into a rectangular bellows, and blow the hot air to the surface of the metal sheet and strip to be heated through multiple air outlets evenly arranged on the surface of the bellows to complete the process purpose of curing the paint on its surface.

[0003] In view of the fact that in the prior art, the bellows box is a rectangular parallelepiped, and the hot air is blown into the rectangular bellows through the fan, and the airflow forms a backflow collision at the edge of the box, thereby forming a relatively large air pressure at the edge of the box. Therefore, the air outlet near the edge of the box blows out a relatively large amount of air, while the air outlet in the middle of the box blows out a relatively small amount of air, which in turn causes the metal strips at the left and right edges of the bellows to heat up quickly and highly, resulting in uneven heating of the strips, and asynchronous volatilization of the paint to form color differences. At the same time, the air nozzle is a rigid air nozzle, which is easy to deform after being heated, and the hot air volume blown out is uneven, and the wind direction is not uniform, which further causes the uneven heating of the metal strip surface to form color spots and blocks. Utility Model Content

[0004] In order to solve the problem in the above-mentioned prior art that the air volume blown out of the air outlet is uneven due to the impact of air flow in the bellows and the deformation of the air outlet due to heat, which further affects the overall uneven heating of the metal plate and strip, causing color difference, color spots and color blocks in the paint on the surface of the plate and strip, the utility model provides a uniform wind box device for a color coating line curing furnace, comprising a bellows, an air duct, and an air outlet arranged on the surface of the bellows, characterized in that the uniform wind box is arranged in a prism shape, and the air outlet is arranged on the larger upper bottom surface of the prism.

[0005] This method of setting the heat-averaging air box of the curing furnace from a rectangular shape to a prism shape can effectively alleviate the problem of excessive air pressure at the edge caused by the air flow in the box colliding with the edge of the box. When the hot air is transported to the heat-averaging air box through the air duct, since the vertical side of the rectangular parallelepiped is changed to the trapezoidal side of the prism, and the trapezoidal side is set at an obtuse angle with the lower surface of the box, the hot air flow blown to the edge of the box can be effectively guided and evacuated to the upper position of the box, forming a backflow at the upper part of the box, so that the hot air in the air box is evenly blown out from the air outlet set on the upper surface, avoiding the problem in the prior art that when the hot air is directly blown to the vertical side of the rectangular bellows, it is directly bounced back and collides with the hot air that continues to blow, resulting in high local air pressure at the edge of the bellows, while low air pressure in the middle, resulting in a large amount of air blown out at the edge of the bellows and a small amount of air blown out in the middle.

[0006] Preferably, the side surface of the wind box along the length direction of the color coating line is arranged in a trapezoidal shape, and the side surface in the width direction of the wind box forms an angle of 150°-165° with the bottom surface of the wind box.

[0007] Preferably, the side surface of the equalizing air box along the width direction of the color coating line is arranged in a trapezoidal shape, and the side surface in the length direction of the air box forms an angle of 120°-150° with the bottom surface of the air box.

[0008] In view of the various factors such as the output of the color coating production line, the power of the bellows, the size of the air outlet, the air volume, the instantaneous air pressure, the position of the air inlet, etc., the inventor conducted many experiments and accidentally discovered that when the side of the bellows in the width direction is at an angle of 150°-165° with the bottom of the bellows, and the side of the bellows in the length direction is at an angle of 120°-150° with the bottom of the bellows, the hot air is transported to the prism box through the induced draft pipe and the evacuation effect is the best, which can most effectively alleviate the problem of local air pressure increase caused by air flow collision. At the same time, the induced draft pipe can be connected to any position on the side of the box to achieve the best drainage and evacuation effect.

[0009] Preferably, the air outlet is arranged in an inverted trumpet shape, and the air outlet consists of a trumpet mouth and a trumpet mouth.

[0010] The air outlet on the upper surface of the box is set to a trumpet-shaped structure with a large opening inside the box and a small opening outside. The hot air is introduced through the large trumpet mouth and gathered and blown out through the small trumpet mouth. The hot air is effectively gathered on a straight line along the width of the plate strip, and the blowing pressure and strength of the hot air are also increased, effectively solving the problems of scattered, ungathered and uneven hot air blown out in the prior art.

[0011] Preferably, the bell mouth of the air outlet is arranged at 120°-150° with the bottom surface of the bellows.

[0012] This setting of the bell mouth expansion angle can effectively balance the air intake volume at the bell mouth and the air outlet pressure at the bell mouth.

[0013] Preferably, the trumpet mouth of the air outlet is arranged with two bends, and both bends are 90° bends.

[0014] This structure with two bends at the bell mouth of the air outlet effectively enhances the physical strength of the bell mouth of the air outlet, avoiding the deformation of the single-layer bell mouth due to overheating of the hot air, which leads to uneven air discharge. The setting of two bends supports and reinforces the bell mouth structure of the air outlet, and the structural strength is significantly improved, which not only prevents deformation when exposed to heat, but also avoids the problem of the bellows being damaged by the bell mouth of the air outlet rubbing against the metal plate when the plate is uneven. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a color coating line curing furnace bellows device provided by the present invention;

[0016] Figure 2 This is a side view of a color coating line curing furnace bellows device provided by the present invention in the length direction of the color coating line;

[0017] Figure 3 This is a side view of a color coating line curing furnace bellows device provided by the present invention in the width direction of the color coating line;

[0018] Figure 4 This is a schematic diagram of the air outlet structure of a color coating line curing furnace provided by the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. This description is only used to explain the utility model, but not to limit the utility model.

[0020] With reference to the accompanying drawings, the implementation cases of the present invention are described below, so as to ensure that ordinary technicians in the field of the present invention can clearly understand the technical solution of the present invention.

[0021] like Figure 1 As shown, the present invention provides a uniform wind box device for a color coating line curing furnace, which includes a prism-shaped wind box 1, an air duct 2, and air outlets 4 arranged in a row on the upper bottom surface 3 of the wind box 1. The wind boxes 1 are arranged in pairs on the upper and lower surfaces of the metal strip, and the metal strip is sandwiched in an upper and lower manner. When the metal strip moves forward to the wind box 1, the upper and lower wind boxes 1 work at the same time, and the hot air is blown to the upper and lower surfaces of the metal strip through the air outlets 4 arranged on the surface, so as to cure and heat the paint on the strip surface.

[0022] like Figure 2 , 3 As shown, the side 5 of the bellows 1 along the length direction of the color coating line is arranged in a trapezoidal shape, and the side 6 in the width direction forms an angle of 150°-165° with the lower bottom surface 7 of the bellows 1. Similarly, the side 6 of the bellows 1 along the width direction of the color coating line is arranged in a trapezoidal shape, and the side 5 in the length direction forms an angle of 120°-150° with the lower bottom surface 7 of the bellows 1. The bellows 1 as a whole presents a prism structure.

[0023] like Figure 4 As shown, the air outlet 4 adopts an inverted trumpet-shaped setting structure, which includes a trumpet mouth 8 for introducing hot air and a trumpet mouth 9 for blowing out hot air, and the trumpet mouth 8 forms an angle of 120°-150° with the upper bottom surface 3 of the bellows. In addition, the trumpet mouth 9 is reinforced with a double bending structure 10, and both bends 10 are reinforced with 90° bends.

[0024] The color coating production line operates normally. After the metal strip is roller-coated and painted, it runs to the bellows device of the curing furnace. The hot air is transported to the bellows 1 through the duct 2. Since the side 5 in the length direction of the bellows 1 is set at an obtuse angle to the lower bottom surface 7, and the side 6 in the width direction is set at an obtuse angle to the lower bottom surface 7, the hot air transported into the bellows 1 is evacuated and guided to the upper position of the box body 1 after contacting the inclined side 5 and side 6, and passes through the air outlet 4 set on the upper bottom surface 3. Figure 1 As shown, the air outlets 4 are arranged linearly along the width direction of the production line, so the hot air is blown linearly from the air outlets 4 to the upper and lower surfaces of the metal strip. As the bellows 1 has multiple air outlets 4 arranged in parallel in the length direction of the color coating production line, the multiple air outlets 4 blow the metal strip forward and backward in succession during the continuous advancement of the metal strip, thereby achieving the effect of curing the paint on the surface of the strip.

[0025] The air outlet 4 is arranged in an inverted trumpet shape, consisting of an open trumpet mouth 8 and a closed trumpet mouth 9, wherein the trumpet mouth 8 is arranged in an open shape in order to be able to introduce a larger amount of hot air, and the trumpet mouth 9 is arranged in a closed shape in order to increase the hot air blowing pressure, so that the hot air in the box body 1 is blown to the surface of the metal strip with force and concentration, and the hot air is prevented from being scattered and unconcentrated. At the same time, the trumpet mouth 9 of the air outlet 4 adopts a double-bend 10 structure, and two reinforcing ribs 10 are added to the trumpet mouth 9 through two bends, which strengthens the physical strength of the trumpet mouth 9 in structure, and avoids deformation caused by long-term hot air blowing and the metal strip scratching the trumpet mouth 9 during operation.

[0026] like Figure 2 , 3As shown, the length side 5 and the width side 6 of the box body 1 can be a pure trapezoidal structure, or the side 5 and 6 can be vertically connected to the upper bottom surface 3 through shorter ribs 11 and 12 according to the needs of convenient processing. This arrangement is also within the protection scope of the present invention.

[0027] The above description is merely an exemplary description of the technical concept of the present invention, and a person skilled in the art of the present invention may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments shown in this specification and the accompanying drawings are not intended to limit the technical concept of the present invention, but are intended to illustrate the present invention, and the scope of the technical concept of the present invention is not limited to these embodiments. The scope of protection of the present invention shall be interpreted by the claims, and all technical concepts within the equivalent scope thereof shall be interpreted as included within the scope of the present invention.

Claims

1. A color coating line curing furnace wind box device, comprising a wind box, an air duct, and an air outlet arranged on the surface of the wind box, characterized in that The balancing air box is arranged in a prism shape, and the side surface of the balancing air box along the length direction of the color coating line is trapezoidal, and the side surface in the width direction of the air box forms an angle of 150°-165° with the bottom surface of the air box. The side surface of the balancing air box along the width direction of the color coating line is trapezoidal, and the side surface in the length direction of the air box forms an angle of 120°-150° with the bottom surface of the air box. The air outlet is arranged on the larger upper bottom surface of the prism, and the air outlet is arranged in an inverted trumpet shape, consisting of a trumpet mouth and a trumpet mouth.

2. The color coating line curing furnace bellows device according to claim 1, characterized in that The bell mouth of the air outlet is arranged at an angle of 120°-150° with the bottom surface of the bellows.

3. The color coating line curing furnace bellows device according to claim 1, characterized in that The trumpet mouth of the air outlet is arranged with two bends, and both bends are 90° bends.

Images