Hot air circulation heating device in drying oven

Abstract

The utility model relates to the field of drying oven heating devices for film belt production, in particular to a hot air circulation heating device in a drying oven, which comprises a hot air unit, an air inlet pipeline assembly, an air outlet pipe, an air return pipeline, a hot air heating mechanism, a hot air pipe and an air cap assembly. An air inlet pipeline assembly is installed at the air inlet end of the hot air unit, one end of the air inlet pipeline assembly is connected with the air inlet end of the hot air unit, the other end of the air inlet pipeline assembly extends into the drying oven, and an air outlet pipe is installed at the air outlet end of the hot air unit. According to the hot air circulation heating device, hot air in the drying oven can be recycled, energy consumption is reduced, meanwhile, the novel heating pipeline structural design is adopted, the heating effect is guaranteed, and meanwhile the uniform and controllable heating effect on the film belt is achieved.

Description

Technical Field

[0001] The utility model relates to the field of oven heating devices for film strip production, in particular to a hot air circulation heating device in an oven. Background Art

[0002] During the production process of the film tape, the film tape needs to be cooled and shaped through a cold water tank and then enter the oven for drying. Currently, the drying and heating device and the air inlet of the heating device in the oven equipment are arranged outside the oven equipment, and the hot air duct outlet is arranged in the oven and directly aimed at the lower side of the film tape for drying. When in use, the heating device heats the external air and then sends it into the oven to heat the film tape. However, this method has two problems. One is that directly heating the external air consumes more energy. The other is that the hot air duct outlet is directly aimed at the lower side of the film tape. The heated airflow can easily cause the film tape to be unevenly heated and deformed. At the same time, water on the film tape can easily drip into the hot air duct, affecting the heating effect. Utility Model Content

[0003] The purpose of the utility model is to provide a hot air circulation heating device in an oven. The overall structural design is scientific. When used, the hot air circulation heating device can circulate the hot air in the oven, reducing energy consumption. At the same time, a new heating pipeline structure design is adopted to ensure the heating effect while effectively preventing the direct blowing damage of the heated airflow to the film tape.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A hot air circulation heating device in an oven comprises a hot air unit, an air inlet duct assembly, an air outlet duct, a return air duct, a hot air heating mechanism, a hot air duct and a hood assembly, wherein the hot air unit is installed outside the oven, an air inlet duct assembly is installed at the air inlet end of the hot air unit, one end of the air inlet duct assembly is connected to the air inlet end of the hot air unit, and the other end of the air inlet duct assembly extends into the oven, an air outlet duct is installed at the air outlet end of the hot air unit, and a return air duct is installed at the outer end of the air outlet duct, the lower air inlet end of the hot air heating mechanism is connected to the return air duct, a hot air duct is installed at the upper air outlet end of the hot air heating mechanism, and the hood assembly is movably arranged on the upper part of the hot air duct and in contact with the hot air duct.

[0006] The hot air unit includes a hot air motor, a body support, a vortex fan, a first docking seat and a second docking seat. The body support is installed outside the oven, and the hot air motor is installed on the body support. The hot air motor is fixedly installed and connected to the body support. The vortex fan is assembled at the working end of the hot air motor, and the first docking seat is installed on the air inlet side of the vortex fan. The air inlet duct assembly is installed on the first pair of seats, and the second docking seat is installed on the return air side of the vortex fan. The air outlet pipe is installed on the second docking seat.

[0007] The intake pipe assembly includes a first intake pipe, a universal adapter tube, an intermediate pipeline and an intake support pipe. One end of the intake support pipe is connected to the first pair of seats, the bottom of the intermediate pipeline is installed at the other end of the intake support pipe and is connected to the intake support pipe, and a universal adapter tube is installed on the upper part of the intermediate pipeline. The first intake pipe is connected to the intermediate pipeline through the universal adapter tube.

[0008] Furthermore, the universal transfer tube is made of a metal hose capable of plastic deformation.

[0009] The hot air heating mechanism includes a lower distribution box, an upper junction box, a first heating tube group and a second heating tube group. The lower side of the lower distribution box is connected to the return air duct. The lower parts of the first heating tube group and the second heating tube group are assembled on the lower distribution box and connected to the lower distribution box. The upper junction box is installed on the upper parts of the first heating tube group and the second heating tube group. The bottom of the hot air pipe is connected to the upper junction box.

[0010] The structures of the lower distribution box and the upper junction box are the same, and they include a first branch pipe, a second branch pipe, a main pipe and an air collecting box. The air collecting box is a trapezoidal three-dimensional box structure, and an air collecting chamber is arranged in the air collecting box. The first branch pipe and the second branch pipe are assembled on one side of the air collecting box and are connected to the air collecting chamber in the air collecting box, and the main pipe is installed on the other side of the air collecting box and is connected to the air collecting chamber in the air collecting box.

[0011] The first heating tube group and the second heating tube group have the same structure, and both include a flow tube and an annular heating sleeve. The upper part of the flow tube is connected to the upper junction box, and the lower part of the flow tube is connected to the lower branch box. A heating cavity is opened in the annular heating sleeve, and a heating wire is arranged in the heating cavity. The flow tube is installed in the heating cavity in the annular heating sleeve.

[0012] The hood assembly includes an annular clamping part, a transition connecting frame and a hood body. The annular clamping part is clamped on the hot air pipe and is in active contact with the hot air pipe. A transition connecting frame is installed on the upper part of the annular clamping part. The transition connecting frame is fixedly connected to the annular clamping part. The hood body is installed on the upper part of the transition connecting frame. The hood body is a circular structure as a whole, and a circular countersunk groove is opened on the hood body. The circular countersunk groove is arranged corresponding to the top of the hot air pipe, and the diameter of the circular countersunk groove is larger than the diameter of the pipe opening at the top of the hot air pipe.

[0013] The beneficial effects of the utility model are as follows: the overall structural design of the hot air circulation heating device in the oven of the utility model is scientific, and compared with the existing hot air circulation heating device in the oven, it has the following technical characteristics and advantages:

[0014] 1. The hot air circulation heating device in the oven of the utility model is provided with an adjustable hood fitting at the outlet of the hot air duct (hot air pipe). When in use, the hood fitting can prevent the hot air flow in the hot air duct from blowing directly to the film strip, thereby preventing the film strip from being heated unevenly and deformed. At the same time, the hood fitting is buckled above the outlet of the hot air pipe, which can prevent water on the film strip from dripping into the hot air pipe, thereby ensuring the heating effect of the hot air pipe;

[0015] 2. The first air inlet pipe in the hot air circulation heating device in the oven of the utility model can be adjusted in position and angle through a universal adapter tube. The first air inlet pipe is arranged in the oven. When the hot air unit is working, the heated air in the oven can be sucked in through the first air inlet pipe to circulate the heated air flow. This structural layout can effectively reduce the consumption of heating energy, reduce the heating energy cost in the oven, and meet the production and use needs of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the hot air circulation heating device of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the hot air unit in the utility model;

[0018] Figure 3 It is a structural schematic diagram of the air intake duct assembly in the utility model;

[0019] Figure 4 It is a structural schematic diagram of the hot air heating mechanism in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the lower shunt box and the upper junction box in the utility model;

[0021] Figure 6 It is a structural schematic diagram of the first heating tube group and the second heating tube group in the utility model;

[0022] Figure 7 It is a structural schematic diagram of the hood assembly in the utility model;

[0023] The numbers in the figure are: 1-hot air unit, 2-air inlet duct assembly, 3-air outlet duct, 4-return air duct, 5-hot air heating mechanism, 6-hot air duct, 7-hood assembly, 11-hot air motor, 12-vortex fan, 13-first docking seat, 14-second docking seat, 21-first air inlet pipe, 22-universal adapter pipe, 23-intermediate pipeline, 24-air inlet support pipe, 51-lower branch box, 52-upper junction box, 53-first heating pipe group, 54-second heating pipe group, 521-first branch pipe, 522-second branch pipe, 523-main pipeline, 524-wind collecting box, 531-flow pipe, 532-annular heating sleeve, 71-annular clamping piece, 72-transition connecting frame, 73-hood body. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it can be directly or indirectly connected to the other element. When an element is referred to as "connected to" another element, it can be directly or indirectly connected to the other element. The terms "left" and "right" used to indicate orientation in this application document are based on the specific structure shown in the accompanying drawings and do not constitute a limitation on the structure.

[0025] Specific embodiment 1: As shown in the specification of the utility model Figure 1 As shown, the utility model provides a hot air circulation heating device in an oven, which mainly includes a hot air unit 1, an air inlet duct assembly 2, an air outlet duct 3, a return air duct 4, a hot air heating mechanism 5, a hot air duct 6 and a hood assembly 7. The hot air unit 1 is used to provide circulation and transportation for heated air. When installed, the hot air unit 1 is installed outside the oven, and an air inlet duct assembly 2 for air intake is installed at the air inlet end of the hot air unit 1. One end of the air inlet duct assembly 2 is connected to the air inlet end of the hot air unit 1, and the other end of the air inlet duct assembly 2 is connected to the air inlet end of the hot air unit 1. One end goes deep into the interior of the oven and sucks in the heated air inside the oven for circulation. An outlet pipe 3 is installed at the outlet end of the hot air unit 1, and a return air duct 4 is installed at the outer end of the outlet pipe 3. The hot air heating mechanism 5 is used to heat the airflow. During installation, the lower air inlet end of the hot air heating mechanism 5 is connected with the return air duct 4, and a hot air duct 6 for air outlet is installed at the upper air outlet end of the hot air heating mechanism 5. The hood assembly 7 is movably and adjustably arranged on the upper part of the hot air duct 6 to protect the hot air duct 6 from water dripping and prevent hot air from directly blowing the film belt.

[0026] As the specification in this utility model Figure 2 As shown, the hot air unit 1 for providing circulation and transportation of heated air comprises a hot air motor 11, a body support, a vortex fan 12, a first docking seat 13 and a second docking seat 14, wherein the body support is used to install and support the hot air motor 11. During installation, the body support is installed outside the oven, and the hot air motor 11 is installed on the body support. The hot air motor 11 is fixedly installed and connected to the body support. The vortex fan 12 is assembled at the working end of the hot air motor 11. At the same time, a first docking seat 13 is installed on the air inlet side of the vortex fan 12, an air inlet duct assembly 2 is installed on the first docking seat, a second docking seat 14 is installed on the return air side of the vortex fan 12, and an air outlet pipe 3 is installed on the second docking seat 14.

[0027] As the specification in this utility model Figure 3 As shown, the intake pipe assembly 2 for air intake includes a first intake pipe 21, a universal adapter tube 22, an intermediate pipeline 23 and an intake support tube 24, wherein, during installation, one end of the intake support tube 24 for supporting the intermediate pipeline 23 is connected to the first pair of seats, the bottom of the intermediate pipeline 23 is installed at the other end of the intake support tube 24 and is connected to the intake support tube 24, and a universal adapter tube 22 that can be freely adjusted in direction is installed on the upper part of the intermediate pipeline 23. When in use, the universal adapter tube 22 can adopt a metal hose that can be plastically deformed, and the first intake pipe 21 for air intake is connected to the intermediate pipeline 23 through the universal adapter tube 22.

[0028] As the specification in this utility model Figure 4 As shown, the hot air heating mechanism 5 for heating the heated air in the oven includes a lower manifold box 51, an upper manifold box 52, a first heating tube group 53 and a second heating tube group 54, wherein, during installation, the lower manifold box 51 is used to dock the lower parts of the first heating tube group 53 and the second heating tube group 54, the upper manifold box 52 is used to dock the upper parts of the first heating tube group 53 and the second heating tube group 54, the lower side of the lower manifold box 51 is installed and connected with the return air duct 4, the lower parts of the first heating tube group 53 and the second heating tube group 54 are assembled on the lower manifold box 51 and connected with the lower manifold box 51, the upper manifold box 52 is connected with the upper parts of the first heating tube group 53 and the second heating tube group 54, and the bottom of the hot air duct 6 for heating gas outflow is installed and connected with the upper manifold box 52.

[0029] As the specification in this utility model Figure 5 , Instruction Manual Figure 6As shown, the structures of the lower branch box 51 and the upper junction box 52 are the same, and the two include a first branch pipe 521, a second branch pipe 522, a main pipe 523 and an air collecting box 524. The air collecting box 524 is a trapezoidal three-dimensional box structure as a whole, and an air collecting chamber is arranged in the air collecting box 524. When installed, the first branch pipe 521 and the second branch pipe 522 are assembled on one side of the air collecting box 524 and are connected to the air collecting chamber in the air collecting box 524, and the main pipe 523 is assembled on the other side of the air collecting box 524 and is connected to the air collecting chamber in the air collecting box 524. The chambers are interconnected, and the first heating tube group 53 and the second heating tube group 54 have the same structure, and both include a flow tube 531 and an annular heating sleeve 532. The flow tube 531 is used for heating the air flow. During installation, the upper part of the flow tube 531 is connected to the upper junction box 52, and the lower part of the flow tube 531 is connected to the lower branch box 51. A heating cavity is opened in the annular heating sleeve 532, and a heating wire for heating the flow tube 531 is arranged in the heating cavity. The flow tube 531 is installed in the heating cavity in the annular heating sleeve 532.

[0030] As the specification in this utility model Figure 7 As shown, the above-mentioned hood assembly 7 includes an annular clamping member 71, a transition connecting frame 72 and a hood body 73, wherein the annular clamping member 71 is used to adapt and clamp with the hot air pipe 6. When installed, the annular clamping member 71 is clamped on the hot air pipe 6 and is in active contact with the hot air pipe 6. A transition connecting frame 72 for supporting the hood body 73 is installed on the upper part of the annular clamping member 71. The transition connecting frame 72 is fixedly connected to the annular clamping member 71, and the hood body 73 is installed on the upper part of the transition connecting frame 72. The hood body 73 is a circular structure as a whole, and a circular countersunk groove is opened on the inner side of the hood body 73. The circular countersunk groove is arranged corresponding to the top of the hot air pipe 6, and the diameter of the circular countersunk groove is larger than the diameter of the pipe opening at the top of the hot air pipe 6.

[0031] The installation and use process of the hot air circulation heating device in the oven of the utility model is as follows: 1. The installation process is as follows:

[0032] First, the installer can install the hot air unit 1. During the specific installation, the operator can install the body support outside the oven, install the hot air motor 11 on the body support, and assemble the vortex fan 12 at the working end of the hot air motor 11. At the same time, the first docking seat 13 is installed on the air inlet side of the vortex fan 12, and the lower part of the air inlet duct assembly 2 is installed on the first docking seat, and the second docking seat 14 is installed on the return air side of the vortex fan 12. The air outlet pipe 3 is installed on the second docking seat 14. When installing the air intake duct assembly 2, the installer can connect one end of the air intake support pipe 24 to the first pair of seats, install the bottom of the intermediate pipeline 23 at the other end of the air intake support pipe 24, install the universal transfer pipe 22 on the upper part of the intermediate pipeline 23, connect the first air intake pipe 21 to the intermediate pipeline 23 through the universal transfer pipe 22, and then install the hot air heating mechanism 5. Specifically, the lower side of the lower shunt box 51 can be connected to the return air duct 4, and the first heating mechanism 5 can be connected to the return air duct 4. The lower parts of the tube group 53 and the second heating tube group 54 are assembled on the lower manifold box 51 and connected to the lower manifold box 51, and the upper manifold box 52 is connected to the upper parts of the first heating tube group 53 and the second heating tube group 54. The bottom of the hot air pipe 6 for heating gas outflow is installed and connected to the upper manifold box 52. When the first heating tube group 53 and the second heating tube group 54 are installed, the upper part of the flow tube 531 can be installed and connected to the upper manifold box 52, and the lower part of the flow tube 531 can be installed and connected to the lower part. The flow box 51 is installed and connected, and then the flow pipe 531 is installed in the heating cavity in the annular heating sleeve 532, and finally the hood assembly 7 can be installed. Specifically, the annular clamping member 71 in the hood assembly 7 can be clamped on the hot air pipe 6 and movably contacted with the hot air pipe 6, and a transition connecting frame 72 is installed on the upper part of the annular clamping member 71, and a hood body 73 is installed on the upper part of the transition connecting frame 72. The hood body 73 is arranged corresponding to the top of the hot air pipe 6; the installation process of the utility model is now completed;

[0033] 2. In specific use, the operator can control the hot air motor 11 in the hot air unit 1 to work, and the hot air motor 11 can drive the vortex fan 12 to work. At this time, the vortex fan 12 can inhale the drying air in the oven through the first air inlet pipe 21 in the air inlet pipe assembly 2, and enter the return air duct 4 through the air outlet pipe 3. The return air duct 4 is connected with the lower branch box 51 in the hot air heating mechanism 5. At this time, the airflow enters the lower branch box 51 and enters the first heating pipe group 53 and the second heating pipe group 53 through the first branch pipe 521 and the second branch pipe 522 on the lower branch box 51. In the flow tube 531 in the heating tube group 54, at this time, the annular heating sleeve 532 outside the flow tube 531 heats the flow tube 531 and the air flow in the flow tube 531, and the heated air flow enters the upper junction box 52 and enters the hot air pipe 6 through the main pipe 523, and flows out between the top of the hot air pipe 6 and the hood body 73. At this time, the hood body 73 buckled on the top of the hot air pipe 6 can effectively prevent the hot air from directly acting on the membrane belt and causing damage to the membrane belt. At the same time, it can also prevent water on the membrane belt from dripping into the hot air duct, ensuring the heating effect of the hot air pipe 6. The above shows and describes the basic principles, main features and advantages of the utility model. The technicians in this industry should understand that the utility model is not limited to the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A hot air circulation heating device in an oven, characterized in that: The invention comprises a hot air unit (1), an air inlet duct assembly (2), an air outlet duct (3), a return air duct (4), a hot air heating mechanism (5), a hot air duct (6) and a hood assembly (7). The air inlet duct assembly (2) is installed at the air inlet end of the hot air unit (1); one end of the air inlet duct assembly (2) is connected to the air inlet end of the hot air unit (1), and the other end of the air inlet duct assembly (2) extends into the interior of the oven; the air outlet duct (3) is installed at the air outlet end of the hot air unit (1); the return air duct (4) is installed at the outer end of the air outlet duct (3); the lower air inlet end of the hot air heating mechanism (5) is connected to the return air duct (4); the hot air duct (6) is installed at the upper air outlet end of the hot air heating mechanism (5); the hood assembly (7) is movably arranged on the upper part of the hot air duct (6) and in contact with the hot air duct (6).

2. The hot air circulation heating device in an oven according to claim 1, characterized in that: The hot air unit (1) comprises a hot air motor (11), a machine body support, a vortex fan (12), a first docking seat (13) and a second docking seat (14); the hot air motor (11) is mounted on the machine body support, the vortex fan (12) is assembled at the working end of the hot air motor (11), the first docking seat (13) is mounted on the air inlet side of the vortex fan (12), the air inlet duct assembly (2) is mounted on the first docking seat, the second docking seat (14) is mounted on the return air side of the vortex fan (12), and the air outlet pipe (3) is mounted on the second docking seat (14).

3. The hot air circulation heating device in an oven according to claim 1, characterized in that: The air intake pipe assembly (2) comprises a first air intake pipe (21), a universal transfer pipe (22), an intermediate pipe (23) and an air intake support pipe (24); one end of the air intake support pipe (24) is connected to the first pair of seats; the bottom of the intermediate pipe (23) is installed at the other end of the air intake support pipe (24) and is connected to the air intake support pipe (24); a universal transfer pipe (22) is installed on the upper part of the intermediate pipe (23); the first air intake pipe (21) is connected to the intermediate pipe (23) via the universal transfer pipe (22).

4. The hot air circulation heating device in an oven according to claim 3, characterized in that: The universal transfer tube (22) is made of a plastically deformable metal hose.

5. The hot air circulation heating device in an oven according to claim 1, characterized in that: The hot air heating mechanism (5) comprises a lower flow box (51), an upper junction box (52), a first heating tube group (53) and a second heating tube group (54); the lower side of the lower flow box (51) is connected to the return air duct (4); the lower parts of the first heating tube group (53) and the second heating tube group (54) are mounted on the lower flow box (51) and connected to the lower flow box (51); the upper junction box (52) is mounted on the upper parts of the first heating tube group (53) and the second heating tube group (54); and the bottom of the hot air duct (6) is connected to the upper junction box (52).

6. The hot air circulation heating device in an oven according to claim 5, characterized in that: The lower branch box (51) and the upper junction box (52) have the same structure, and both include a first branch pipe (521), a second branch pipe (522), a main pipe (523) and an air collecting box (524). An air collecting chamber is provided in the air collecting box (524). The first branch pipe (521) and the second branch pipe (522) are installed on one side of the air collecting box (524) and are connected to the air collecting chamber in the air collecting box (524). The main pipe (523) is installed on the other side of the air collecting box (524) and is connected to the air collecting chamber in the air collecting box (524).

7. The hot air circulation heating device in an oven according to claim 5, characterized in that: The first heating tube assembly (53) and the second heating tube assembly (54) have the same structure, and both include: A flow tube (531) and an annular heating sleeve (532), wherein the upper portion of the flow tube (531) is connected to the upper junction box (52), and the lower portion of the flow tube (531) is connected to the lower junction box (51). A heating cavity is provided in the annular heating sleeve (532), a heating wire is provided in the heating cavity, and the flow tube (531) is installed in the heating cavity in the annular heating sleeve (532).

8. The hot air circulation heating device in an oven according to claim 1, characterized in that: The hood assembly (7) comprises an annular clamping member (71), a transition connecting frame (72) and a hood body (73); the annular clamping member (71) is clamped on the hot air pipe (6) and is in active contact with the hot air pipe (6); a transition connecting frame (72) is installed on the upper part of the annular clamping member (71); and a hood body (73) is installed on the upper part of the transition connecting frame (72); the hood body (73) is a circular structure as a whole, and a circular countersunk groove is opened on the hood body (73); the circular countersunk groove is arranged corresponding to the top of the hot air pipe (6) and the diameter of the circular countersunk groove is larger than the diameter of the top pipe opening of the hot air pipe (6).

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