Epoxy coiled material hot air drying and heating device

Abstract

The utility model belongs to the technical field of epoxy coiled material drying equipment, and discloses an epoxy coiled material hot air drying and heating device which comprises a fan, an air inlet pipeline, a hot steam exchanger and an air outlet pipeline, an air inlet of the hot steam exchanger is connected with the air inlet pipeline, the air inlet pipeline is connected with the fan, and an air outlet of the hot steam exchanger is connected with the air outlet pipeline. A fresh air buffering and homogenizing mechanism is arranged in the air inlet pipeline and comprises a first buffering plate and a second buffering plate which are sequentially distributed at intervals in the fresh air conveying direction, a plurality of first ventilation holes are evenly distributed in the first buffering plate at intervals, and a plurality of second ventilation holes are evenly distributed in the second buffering plate at intervals. By means of partition of the first buffer plate and the second buffer plate, the circulation speed of fresh air is effectively reduced, the fresh air is dispersed, heat exchange is more sufficient, energy waste is reduced, and therefore it is guaranteed that heat distribution of hot air is more uniform, and the drying quality of products is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of epoxy coil drying equipment, and particularly relates to a hot air drying and heating device for epoxy coil. Background Art

[0002] In the manufacturing process of epoxy coils, the surface of the coils needs to be dried after being coated with epoxy resin, which helps to quickly volatilize the solvent in the coating, solidify the material, and ensure that the quality and performance of the epoxy coils are up to standard. In the prior art, a fan is usually used to provide fresh air for the drying equipment, and the fresh air is heat exchanged through a heat steam exchanger to generate hot air. Since the fresh air introduced by the fan enters in a whole stream and flows at a relatively fast speed, the heat exchange with the hot steam is incomplete when passing through the heat steam exchanger, resulting in energy waste, and the heat of the generated hot air is uneven, affecting the quality of the product drying. Therefore, there is an urgent need to provide a hot air drying and heating device for epoxy coils to make the heat exchange more sufficient, reduce energy waste, and improve the uniformity of the hot air heat distribution, thereby improving the drying quality of the product. Utility Model Content

[0003] In view of the deficiencies in the background technology, the utility model provides a hot air drying and heating device for epoxy coils, which makes heat exchange more sufficient, reduces energy waste, improves the uniformity of hot air heat distribution, and improves product drying quality.

[0004] To achieve the above objectives, the technical solutions of this utility model are as follows:

[0005] A hot air drying and heating device for epoxy coils, characterized in that it includes a fan, an air inlet duct, a heat steam exchanger and an air outlet duct, the air inlet of the heat steam exchanger is connected to the air inlet duct, the air inlet duct is connected to the fan, the air outlet of the heat steam exchanger is connected to the air outlet duct, a fresh air buffering and equalizing mechanism is provided in the air inlet duct, the fresh air buffering and equalizing mechanism includes a first buffer plate and a second buffer plate that are sequentially spaced along the fresh air conveying direction, a plurality of first ventilation holes are evenly spaced on the first buffer plate, and a plurality of second ventilation holes are evenly spaced on the second buffer plate.

[0006] Preferably, the air inlet duct includes a first duct and a second duct, the second duct is a hollow frustum-shaped structure with a trumpet-shaped vertical cross-section, and the end with a larger diameter is connected to the air inlet of the heat steam exchanger, and the other end is connected to the first duct.

[0007] Preferably, the first buffer plate is fixedly arranged in the first pipe, and the second buffer plate is fixedly arranged at the end of the second pipe with a smaller diameter, and its vertical cross-section is a frustum-shaped structure matching the second pipe.

[0008] Preferably, the second ventilation holes include a central hole group and side hole groups symmetrically distributed on the upper and lower sides of the central hole group, and the air outlet direction of the side hole group on each side is consistent with the inclination direction of the second pipe side wall on the corresponding side.

[0009] Preferably, a wing plate is provided at one end of the first pipe close to the second pipe, and the wing plate is assembled and connected to the second buffer plate.

[0010] Preferably, the heat steam exchanger includes a shell, four groups of heat dissipation tubes evenly spaced and parallel to each other in the shell, and a first cavity and a second cavity respectively located at both ends of the four groups of heat dissipation tubes. The first cavity and the second cavity form an S-shaped steam loop through the four groups of heat dissipation tubes. The upper side of the first cavity is connected to an air inlet pipe, and the lower side is connected to an air outlet pipe.

[0011] Preferably, the first cavity is divided into three parts by two first partitions arranged inside it, which are the air inlet cavity, the middle cavity and the air outlet cavity from top to bottom. The second cavity is divided into the upper cavity and the lower cavity by the second partition arranged inside it. One side of the air inlet cavity is connected to the air inlet pipe, and the other side is connected to the upper cavity through a group of heat dissipation pipes on the upper side. The middle cavity is connected to the upper cavity and the lower cavity respectively through the two groups of heat dissipation pipes in the middle. One side of the air outlet cavity is connected to the air outlet pipe, and the other side is connected to the lower cavity through a group of heat dissipation pipes on the lower side.

[0012] Preferably, the air inlet duct and the air inlet of the heat steam exchanger, and the air outlet duct and the air outlet of the heat steam exchanger are both assembled and connected via two flanges.

[0013] Preferably, a sealing gasket is provided between each corresponding two flanges.

[0014] Preferably, the air outlet duct is a hollow frustum-shaped structure with a trumpet-shaped vertical cross-section, and the end with a larger diameter is connected to the air outlet of the heat steam exchanger.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention utilizes the partitions of the first buffer plate and the second buffer plate to effectively reduce the circulation speed of the fresh air and disperse it so that it enters the hot steam heat exchanger more evenly to achieve heat exchange, and the structural design of the second ventilation hole and the second pipe can effectively avoid the existence of ventilation dead corners, ensure that the heat exchange of each heat dissipation pipe in the hot steam exchanger is more sufficient, reduce energy waste, and thus ensure that the heat distribution of the hot air discharged from the hot steam heat exchanger is more uniform, so as to improve the drying quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0019] Figure 3 This is a schematic cross-sectional view of the heat steam exchanger of the present utility model;

[0020] Figure 4 This is a schematic diagram of a partial cross-sectional side view of a heat steam exchanger of the present invention;

[0021] In the figure: 1. fan, 2. air inlet duct, 201. first duct, 202. second duct, 203. wing plate, 3. heat steam exchanger, 301. shell, 302. heat pipe, 303. air inlet pipe, 304. air outlet pipe, 305. first partition, 306. air inlet cavity, 307. middle cavity, 308. air outlet cavity, 309. second partition, 3010. upper cavity, 3011. lower cavity, 3012. heat dissipating fin, 4. air outlet duct, 5. first buffer plate, 501. first ventilation hole, 6. second buffer plate, 601. center hole group, 602. side hole group, 7. flange, 8. sealing gasket, 9. bolt, 10. screw. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] In the description of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In this utility model, unless otherwise specified or limited, the terms "disposed," "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed or detachable connections, mechanical connections, direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0025] like Figure 1 As shown, a hot air drying and heating device for epoxy coils includes a fan 1, an air inlet duct 2, a heat steam exchanger 3, and an air outlet duct 4. The air inlet of the heat steam exchanger is connected to the air inlet duct, the air inlet duct is connected to the fan, and the air outlet of the heat steam exchanger is connected to the air outlet duct. The fan transports outside air into the air inlet duct to form fresh air. After entering the heat steam exchanger, the fresh air exchanges heat with the hot steam, raising the air temperature. The air is then discharged through the air outlet duct, providing hot air for drying the epoxy coils. A fresh air buffering and homogenizing mechanism is provided in the air inlet duct to reduce the delivery speed of the fresh air and disperse the entire air stream so that it enters the heat steam heat exchanger more evenly for heat exchange. This ensures more complete heat exchange and reduces energy waste, thereby ensuring a more uniform heat distribution of the hot air discharged from the heat steam heat exchanger, thereby improving the drying quality of the product. Specifically, the fresh air buffering and homogenizing mechanism includes a first buffer plate 5 and a second buffer plate 6 that are spaced apart in sequence along the fresh air conveying direction. A plurality of first ventilation holes 501 are evenly spaced apart on the first buffer plate, and a plurality of second ventilation holes are evenly spaced apart on the second buffer plate. The two buffer plates are used to block and disperse the fresh air, and the fresh air passes through the first ventilation holes and the second ventilation holes in sequence and then enters the heat steam exchanger.

[0026] The air inlet duct includes a first duct 201 and a second duct 202. The second duct is a hollow frustum-shaped structure with a trumpet-shaped vertical cross-section. The end with a larger diameter is connected to the air inlet of the heat steam exchanger, and the other end is connected to the first duct. The inner diameter of the first duct is smaller than the inner diameter of either end of the second duct. When the fresh air enters the second duct from the first duct, the circulation speed slows down. The first buffer plate is fixedly arranged in the first duct. The air outlet direction of the first ventilation hole is parallel to the central axis of the first duct. The second buffer plate is fixedly arranged at the end with a smaller diameter of the second duct, and its vertical cross-section is a frustum-shaped structure matching the second duct. The second ventilation hole includes a central hole group 601 and a side hole group 602 symmetrically distributed on the upper and lower sides of the central hole group. The air outlet direction of the side hole group on each side is consistent with the inclination direction of the side wall of the second duct on the corresponding side. The fresh air passing through the second buffer plate can fill the entire second duct and enter the heat steam exchanger more dispersedly and evenly, avoiding concentrated entry from the middle of the second duct, resulting in waste of hot steam in the heat dissipation pipes on the upper and lower sides of the heat exchanger, resulting in waste of resources. The specific fresh air input, delivery and output flow direction can be referred to Figure 1 In addition, combined with Figure 2 As shown, in order to facilitate the installation and manufacturing of the first buffer plate and the second buffer plate, as well as subsequent maintenance, a wing plate 203 is provided at one end of the first pipe close to the second pipe. The wing plate and the second buffer plate are assembled and connected with screws 10, which facilitates the disassembly and assembly between the first pipe and the second pipe. The wing plate and the first pipe are an integrated structure, which effectively improves their connection strength and stability.

[0027] Combine Figure 1 、 Figure 3 and Figure 4 As shown, the heat steam exchanger includes a housing 301, four groups of heat pipes 302 evenly spaced parallel to each other within the housing, and a first cavity and a second cavity located at either end of the four groups of heat pipes. The first cavity and the second cavity form an S-shaped steam loop through the four groups of heat pipes. The upper side of the first cavity is connected to an inlet pipe 303, and the lower side is connected to an outlet pipe 304. Flanges 7 are provided at the ends of the inlet and outlet pipes to facilitate connection to external steam supply and steam recovery equipment. In this embodiment, each group of heat pipes includes 20 heat pipes, evenly divided into two rows of 10 pipes each. Each heat pipe is evenly spaced on the outside with heat dissipation fins 3012 to improve heat transfer efficiency. In actual use, the number and arrangement of heat pipes in each group can be adjusted as needed. The first cavity is divided into three parts by two first partitions 305 disposed therein: an inlet cavity 306, a middle cavity 307, and an outlet cavity 308, from top to bottom. The second cavity is divided into an upper cavity 3010 and a lower cavity 3011 by a second partition 309 disposed therein. The inlet cavity is connected to the inlet pipe on one side and communicates with the upper cavity via the topmost set of heat pipes on the other side. The middle cavity communicates with the upper and lower cavities via the two middle sets of heat pipes, respectively. The outlet cavity is connected to the outlet pipe on one side and communicates with the lower cavity via the bottommost set of heat pipes on the other side. During operation, hot steam enters the inlet cavity through the inlet port, passes through the topmost set of heat pipes (the first set of heat pipes), enters the upper cavity, then enters the middle cavity through the next set of heat pipes (the second set of heat pipes), enters the lower cavity through the next set of heat pipes (the third set of heat pipes), and finally enters the outlet cavity through the bottommost heat pipe (the fourth set of heat pipes), where it is discharged through the outlet cavity, achieving recycling. The fresh air entering from the air inlet duct passes through the gaps between the heat dissipation tubes, contacts the heat dissipation tubes and heat dissipation fins to achieve heat exchange, so that the air temperature of the fresh air is increased to achieve heating, and finally the hot air is discharged from the air outlet duct.

[0028] To facilitate assembly, disassembly, and maintenance of the air inlet and outlet ducts and the heat steam exchanger, the air inlet and outlet ducts are connected to the heat steam exchanger's air inlet and outlet, respectively, via two flanges 7. These flanges are secured with bolts 9, and a sealing gasket 8 is positioned between each flange to ensure a tight seal. The outlet duct is a hollow frustum with a bell-shaped vertical cross-section. Its larger end is connected to the heat steam exchanger's outlet, increasing the speed of hot air delivery. In this embodiment, the heat steam radiator's housing is rectangular, so the second duct and the outlet duct are both hollow rectangular frustums, while the first duct is a hollow cuboid.

[0029] The working principle of this utility model is as follows:

[0030] like Figure 1 As shown, when working, the fan 1 converts the external air into fresh air and sends it into the air inlet duct 2. After being dispersed by the first buffer plate 5, it is transported to the second duct 202 and then blocked by the second buffer plate 6. The fresh air continues to disperse and flows in a trumpet shape, filling the entire second duct 202, and then enters the heat steam exchanger 3, flows between the heat dissipation tubes 302, and fully exchanges heat with each group of heat dissipation tubes 302 and the heat dissipation fins 3012 to achieve air heating. The heated hot air is discharged from the air outlet duct 4 and enters the drying equipment.

[0031] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that come within the meaning and range of equivalents of the claims be included in the present invention.

Claims

1. A hot air drying and heating device for epoxy coils, characterized by: It includes a fan, an air inlet duct, a heat steam exchanger and an air outlet duct, the air inlet of the heat steam exchanger is connected to the air inlet duct, the air inlet duct is connected to the fan, and the air outlet of the heat steam exchanger is connected to the air outlet duct. A fresh air buffering and equalizing mechanism is provided in the air inlet duct, and the fresh air buffering and equalizing mechanism includes a first buffer plate and a second buffer plate which are sequentially spaced along the fresh air conveying direction, a plurality of first ventilation holes are evenly spaced on the first buffer plate, and a plurality of second ventilation holes are evenly spaced on the second buffer plate.

2. The hot air drying and heating device for epoxy coiled material according to claim 1, characterized in that: The air inlet duct includes a first duct and a second duct. The second duct is a hollow frustum-shaped structure with a trumpet-shaped vertical cross-section. The end with a larger diameter is connected to the air inlet of the heat steam exchanger, and the other end is connected to the first duct.

3. The hot air drying and heating device for epoxy coiled material according to claim 2, characterized in that: The first buffer plate is fixedly arranged in the first pipe, and the second buffer plate is fixedly arranged at the end of the second pipe with a smaller diameter, and its vertical cross-section is a frustum-shaped structure matching the second pipe.

4. The hot air drying and heating device for epoxy coiled material according to claim 3, characterized in that: The second ventilation holes include a central hole group and side hole groups symmetrically distributed on the upper and lower sides of the central hole group. The air outlet direction of the side hole group on each side is consistent with the inclination direction of the second pipe side wall on the corresponding side.

5. The hot air drying and heating device for epoxy coiled material according to claim 3, characterized in that: A wing plate is provided at one end of the first pipe close to the second pipe, and the wing plate is assembled and connected to the second buffer plate.

6. The hot air drying and heating device for epoxy coiled material according to claim 1, characterized in that: The heat steam exchanger includes a shell, four groups of heat dissipation tubes evenly spaced and distributed in parallel in the shell, and a first cavity and a second cavity respectively located at both ends of the four groups of heat dissipation tubes. The first cavity and the second cavity form an S-shaped steam loop through the four groups of heat dissipation tubes. The upper side of the first cavity is connected to an air inlet pipe, and the lower side is connected to an air outlet pipe.

7. The hot air drying and heating device for epoxy coiled material according to claim 6, characterized in that: The first cavity is divided into three parts by two first partitions arranged inside it, which are the air inlet cavity, the middle cavity and the air outlet cavity from top to bottom. The second cavity is divided into an upper cavity and a lower cavity by a second partition arranged inside it. One side of the air inlet cavity is connected to the air inlet pipe, and the other side is connected to the upper cavity through a group of heat dissipation pipes on the upper side. The middle cavity is connected to the upper cavity and the lower cavity respectively through the two groups of heat dissipation pipes in the middle. One side of the air outlet cavity is connected to the air outlet pipe, and the other side is connected to the lower cavity through a group of heat dissipation pipes on the lower side.

8. The hot air drying and heating device for epoxy coiled material according to claim 1, characterized in that: The air inlet duct and the air inlet of the heat steam exchanger, as well as the air outlet duct and the air outlet of the heat steam exchanger are both assembled and connected via two flanges.

9. The hot air drying and heating device for epoxy coiled material according to claim 8, characterized in that: A sealing gasket is provided between each corresponding two flanges.

10. The hot air drying and heating device for epoxy coiled material according to claim 1, characterized in that: The air outlet duct is a hollow frustum-shaped structure with a trumpet-shaped vertical cross section, and the end with a larger diameter is connected to the air outlet of the heat steam exchanger.

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