Hot air drying device

Abstract

The utility model relates to the technical field of strip steel production, and particularly discloses a hot air drying device which comprises an upper box body and a lower box body fixedly connected with the upper box body, a gap for strip steel to pass through is formed between the upper box body and the lower box body, an upper hot air pipeline is arranged on the upper box body, and a lower hot air pipeline is arranged on the lower box body. An upper main air inducing structure and an upper auxiliary air inducing structure which face the gap are sequentially arranged on the lower surface of the upper box body in the strip steel advancing direction, and a lower main air inducing structure and a lower auxiliary air inducing structure which face the gap are sequentially arranged on the upper surface of the lower box body in the strip steel advancing direction. The upper main air inducing structure and the lower main air inducing structure are attached to the upper surface and the lower surface of the strip steel correspondingly, and the problem that the strip steel drying efficiency is affected due to the fact that an upper air knife and a lower air knife installed in a traditional hot air drying device are not in contact with the surface of the strip steel and hot air can be blown to the surface of the strip steel, and residual water spots splash is solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of strip steel production, and particularly discloses a hot air drying device. BACKGROUND

[0002] In the production process of strip steel, alkali liquid needs to be sprayed on the upper and lower surfaces of the strip steel, and then the strip steel is brushed, so that the degreasing purpose is achieved. The steps include alkali liquid spraying and brushing, water cleaning, water flushing, hot air drying and insulating coating spraying.

[0003] The hot air drying is completed by a hot air drying device. For example, the hot air drying device disclosed in Chinese Patent No. CN212692405U comprises an upper box body and a lower box body, an internal passage is formed between the upper box body and the lower box body, an upper air knife is installed on the lower surface of the upper box body, and a lower air knife is installed on the upper surface of the lower box body. The strip steel travels between the upper box body and the lower box body, the upper air knife and the lower air knife are aligned with the upper and lower surfaces of the strip steel respectively, hot air is introduced into the upper box body and the lower box body during the travel of the strip steel, and the hot air is sprayed from the upper air knife and the lower air knife to blow against the upper and lower surfaces of the strip steel, so that the strip steel is dried.

[0004] Although the upper air knife and the lower air knife can guide the hot air, in the prior art, the upper air knife and the lower air knife are not in contact with the surface of the strip steel, so that in the process of blowing the hot air by the upper air knife and the lower air knife, the hot air blows against the surface of the strip steel, and the residual water stains on the surface of the strip steel are splashed, thereby affecting the drying efficiency of the strip steel.

[0005] Therefore, the inventor provides a hot air drying device to solve the above problems. CONTENT OF THE UTILITY MODEL

[0006] The utility model aims at solving the problem that the upper air knife and the lower air knife installed in the traditional hot air drying device are not in contact with the surface of the strip steel, the hot air blows against the surface of the strip steel, the residual water stains are splashed, and the drying efficiency of the strip steel is affected.

[0007] In order to achieve the above purpose, the basic scheme of the utility model provides a hot air drying device, which comprises an upper box body and a lower box body fixed to the upper box body, a gap for the strip steel to pass through is formed between the upper box body and the lower box body, an upper hot air pipeline is arranged on the upper box body, a lower hot air pipeline is arranged on the lower box body, a main air guide structure and a vice air guide structure facing the gap are sequentially arranged on the lower surface of the upper box body along the direction of the strip steel, a main air guide structure and a vice air guide structure facing the gap are sequentially arranged on the upper surface of the lower box body along the direction of the strip steel, and the main air guide structure of the upper box body and the main air guide structure of the lower box body respectively match the upper surface and the lower surface of the strip steel.

[0008] Further, the upper main air guide structure comprises an upper guide block detachably connected to the lower surface of the upper box, and upper main air guide plates detachably connected to the lower surface of the upper box on both sides of the upper guide block.

[0009] Further, the lower main air guide structure comprises a lower guide block detachably connected to the upper surface of the lower box, and lower main air guide plates detachably connected to the upper surface of the lower box on both sides of the lower guide block.

[0010] Further, the bottom end of the upper main air guide plate and the top end of the lower main air guide plate are inclined towards the same direction, and the inclination direction is opposite to the running direction of the strip.

[0011] Further, the inner side wall of the upper main air guide plate near the bottom end is attached to the outer wall of the upper guide block on the same side, and the inner side wall of the lower air guide plate near the top end is attached to the outer wall of the lower guide block on the same side.

[0012] Further, the upper main air guide structure comprises an upper guide block detachably connected to the lower surface of the upper box, and upper main air guide plates detachably connected to the lower surface of the upper box on both sides of the upper guide block.

[0013] Further, the lower main air guide structure comprises a lower guide block detachably connected to the upper surface of the lower box, and lower main air guide plates detachably connected to the upper surface of the lower box on both sides of the lower guide block.

[0014] The principle and effect of the present scheme are:

[0015] 1. Compared with the prior art, the upper main air guide structure installed in the present application separates the gap on the upper surface of the strip into two chambers, and the water stains can be removed through the upper main air guide structure, reducing the residual water stains on the surface of the strip. The lower main air guide structure installed in the present application also separates the gap on the lower surface of the strip into two chambers, and the water stains can be removed through the lower main air guide structure, reducing the residual water stains on the surface of the strip, enhancing the drying efficiency of the strip, and solving the problem that the upper air knife and the lower air knife installed in the traditional hot air drying device do not contact the surface of the strip, and the hot air blows on the surface of the strip, causing the residual water stains to splash and affect the drying efficiency of the strip.

[0016] 2、Compared with the prior art, the hot air blown by the upper main air guide plate can not only scrape off water stains, but also can control the hot air to escape only in a certain range, forming a chamber separated from the upper auxiliary air guide plate, and meanwhile, the bottom end of the upper main air guide plate is inclined towards the direction opposite to the running direction of the strip, so as to blow the water stains towards the entering direction of the strip, increase the heating time of the water stains, accelerate the drying of the upper surface of the strip, and the lower main air guide plate and the lower auxiliary air guide plate can accelerate the drying of the lower surface of the strip. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A schematic diagram of a hot air drying device according to an embodiment of the present application is shown;

[0019] Figure 2 A partial schematic diagram of a hot air drying device according to an embodiment of the present application is shown;

[0020] Figure 3 A top view of a hot air drying device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0021] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the present application will be described in detail below with reference to the drawings and preferred embodiments.

[0022] The reference signs in the drawings of the specification include: strip 1, upper box body 2, lower box body 3, upper guide block 4, upper main guide plate 5, upper auxiliary guide plate 6, upper air port 7, lower main guide plate 8, and lower auxiliary guide plate 9.

[0023] A hot air drying device, as shown in Figure 1 , Figure 2 and Figure 3 ,

[0024] includes an upper box body 2 and a lower box body 3 fixedly connected to the upper box body 2 by bolts. A gap for the strip 1 to pass through is formed between the upper box body 2 and the lower box body 3, and two support rollers are respectively installed on the two side walls of the top of the lower box body 3 along the running direction of the strip 1. During the running process of the strip 1 from left to right, the strip 1 is respectively supported by the two side support rollers.

[0025] The upper hot air duct is connected to the upper box body 2, penetrates into the upper box body 2, and forms a plurality of upper air outlets 7 on the lower surface of the upper box body 2 and facing the upper surface of the strip steel 1. The lower hot air duct is connected to the lower box body 3, penetrates into the lower box body 3, and forms a plurality of lower air outlets on the upper surface of the lower box body 3 and facing the lower surface of the strip steel 1.

[0026] The lower surface of the upper box body 2 is sequentially provided with an upper main air guide structure and an upper auxiliary air guide structure facing the gap along the running direction of the strip steel 1, and the upper main air guide structure and the upper auxiliary air guide structure are respectively attached to the upper surface and the lower surface of the strip steel 1.

[0027] Specifically, as shown in Figure 2 and Figure 3 , the upper main air guide structure includes an upper guide block 4 mounted on the lower surface of the upper box body 2 by bolts, and upper main air guide plates mounted on the lower surface of the upper box body 2 on both sides of the upper guide block 4 by bolts. In this embodiment, two sets of upper main air guide structures are installed. The upper auxiliary air guide structure includes an upper guide block 4 mounted on the lower surface of the upper box body 2 by bolts, and upper auxiliary air guide plates mounted on the lower surface of the upper box body 2 on both sides of the upper guide block 4 by bolts. In this embodiment, three sets of upper auxiliary air guide structures are installed.

[0028] The bottom end of the upper guide block 4 is conical and in line contact with the upper surface of the strip steel 1. The bottom end of the upper main air guide plate is inclined towards the left side and in line contact with the upper surface of the strip steel 1, and the inclined direction is opposite to the running direction of the strip steel 1, and the inner side wall of the upper main air guide plate near the bottom end is attached to the outer wall of the upper guide block 4 on the same side. The bottom end of the upper auxiliary air guide plate is inclined towards the left side, but does not contact the upper surface of the strip steel 1, and the inner side wall of the upper auxiliary air guide plate near the bottom end is attached to the outer wall of the upper guide block 4 on the same side.

[0029] The lower main air guide structure includes a lower guide block mounted on the upper surface of the lower box body 3 by bolts, and lower main air guide plates mounted on the upper surface of the lower box body 3 on both sides of the lower guide block by bolts. In this embodiment, two sets of lower main air guide structures are installed. The lower auxiliary air guide structure includes a lower guide block mounted on the upper surface of the lower box body 3 by bolts, a lower guide block mounted on the upper surface of the lower box body 3 on both sides of the lower guide block by bolts, and a lower auxiliary air guide plate mounted on the upper surface of the lower box body 3 on both sides of the lower guide block by bolts. In this embodiment, three sets of lower auxiliary air guide structures are installed.

[0030] The top end of the lower guide block is conical and in line contact with the lower surface of the strip steel 1. The bottom end of the lower main air guide plate is inclined towards the left and in line contact with the lower surface of the strip steel 1, the inclination direction is opposite to the running direction of the strip steel 1, and the inner side wall of the lower main air guide plate near the bottom end is in close contact with the outer wall of the lower guide block on the same side.

[0031] Further, as shown in Figure 3 The lengths of the upper main air guide plate, the upper auxiliary air guide plate, the lower main air guide plate and the lower auxiliary air guide plate are equal and greater than the width of the strip steel 1. The upper main air guide plate and the upper auxiliary air guide plate are arranged at equal distances, and the lower main air guide plate and the lower auxiliary air guide plate are also arranged at equal distances.

[0032] In the embodiment, the upper air outlet 7 and the lower air outlet on the inner side of the upper main air guide plate and the lower main air guide plate are formed with a plurality of partitions to reduce the area of the air outlet and enhance the strength of the air. The upper air outlet 7 and the lower air outlet on the inner side of the upper auxiliary air guide plate and the lower auxiliary air guide plate are not partitioned.

[0033] When the utility model is used, hot air is first introduced into the upper box 2 and the lower box 3;

[0034] The strip steel 1 enters the gap between the upper box 2 and the lower box 3 from the left side and passes out from the right side. The strip steel 1 is mainly supported by the upper guide block 4, the lower guide block and the supporting roller. During the running of the strip steel 1, hot air is blown out from the upper air outlet 7 and the lower air outlet;

[0035] The air blown out from the upper air outlet 7 is divided into two parts, one part is the hot air blown out from the upper main air guide plate, and the other part is the hot air blown out from the upper auxiliary air guide plate. The hot air blown out from the upper main air guide plate not only can scrape off water stains because the bottom end of the upper main air guide plate is in contact with the upper surface of the strip steel 1, but also can control the hot air to escape within a certain range to form a chamber separated from the upper auxiliary air guide plate. At the same time, the upper main air guide plate and the upper auxiliary air guide plate are inclined towards the same direction, which can blow the water stains towards the entering direction of the strip steel 1, increase the heating time of the water stains and accelerate the drying of the upper surface of the strip steel 1.

[0036] Similarly, the air blown out from the lower air outlet is also divided into two parts, which are the hot air blown out from the lower main air guide plate and the hot air blown out from the lower auxiliary air guide plate, and the lower main air guide plate and the lower auxiliary air guide plate form a chamber separated from each other to increase the heating time of the water stains and accelerate the drying of the lower surface of the strip steel 1.

[0037] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make minor changes or modifications to the disclosed technical content, or make equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, equivalent change or modification of the above embodiments, which does not depart from the technical solution of the present application, is still within the scope of the technical solution of the present application.

Claims

1. A hot air drying device, comprising an upper chamber and a lower chamber fixedly connected to the upper chamber, wherein a gap for passing through a strip of steel is formed between the upper chamber and the lower chamber, an upper hot air duct is provided on the upper chamber, and a lower hot air duct is provided on the lower chamber, characterized in that, The lower surface of the upper housing is provided with an upper main air intake structure and an upper auxiliary air intake structure facing the gap along the strip's travel direction. The upper surface of the lower housing is provided with a lower main air intake structure and a lower auxiliary air intake structure facing the gap along the strip's travel direction. The upper main air intake structure and the lower main air intake structure are respectively attached to the upper and lower surfaces of the strip.

2. The hot air drying apparatus according to claim 1, characterized in that, The upper main exhaust structure includes an upper guide block detachably connected to the lower surface of the upper housing, and upper main exhaust plates detachably connected to the lower surfaces of the upper housing on both sides of the upper guide block. The bottom ends of the upper guide block and the upper main exhaust plates are both attached to the upper surface of the strip steel.

3. The hot air drying apparatus according to claim 2, characterized in that, The lower main exhaust structure includes a lower guide block detachably connected to the upper surface of the lower housing, and lower main exhaust plates detachably connected to the upper surfaces of the lower housing on both sides of the lower guide block. The top ends of the lower guide block and the lower main exhaust plates are both attached to the lower surface of the strip steel.

4. A hot air drying apparatus according to claim 3, characterized in that, The bottom end of the upper main air intake plate and the top end of the lower main air intake plate are both inclined in the same direction, and the direction of inclination is opposite to the direction of the strip's travel.

5. A hot air drying apparatus according to claim 4, characterized in that, The inner sidewall of the upper main air intake plate near the bottom end is attached to the outer wall of the upper guide block on the same side, and the inner sidewall of the lower air intake plate near the top end is attached to the outer wall of the lower guide block on the same side.

6. A hot air drying apparatus according to claim 1, characterized in that, The upper auxiliary air intake structure includes an upper guide block detachably connected to the lower surface of the upper housing, and upper auxiliary air intake plates detachably connected to the lower surfaces of the upper housing on both sides of the upper guide block. The bottom end of the upper guide block is attached to the upper surface of the strip steel.

7. A hot air drying apparatus according to claim 6, characterized in that, The lower auxiliary air intake structure includes a lower guide block detachably connected to the upper surface of the lower housing, and lower auxiliary air intake plates detachably connected to the upper surfaces of the lower housing on both sides of the lower guide block. The top of the lower guide block is attached to the upper surface of the strip steel.

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