Film-drawing drying oven with external hot air system

Abstract

The utility model relates to the technical field of drying boxes, in particular to a film-drawing drying box with an external hot air system. Comprising a heat preservation box body, a hot air system and a plenum chamber, the plenum chamber is located in the heat preservation box body, and the hot air system is located at the top of the heat preservation box body and communicates with the plenum chamber; a film inlet and a film outlet are formed in the two opposite sides of the heat preservation box body respectively, the plenum chamber comprises an upper plenum chamber and a lower plenum chamber which are communicated through a connecting air pipe, air flows out of the upper plenum chamber and the lower plenum chamber oppositely, a gap is formed between the upper plenum chamber and the lower plenum chamber, and the gap is flush with the film outlet; the hot air system comprises a circulating air pipeline, one end of the circulating air pipeline is provided with a fresh air opening, the other end of the circulating air pipeline is connected with a fan, a heater and a filter are arranged between the fresh air opening and the fan, and an outlet of the fan is communicated with the connecting air pipe. The hot air system is arranged on the top of the heat preservation box body instead of inside, so that the occupied area is smaller, and installation and use in narrow space are facilitated; and the structure is compact and the installation is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying box technical field, concretely is a hot -blast system external pull film drying oven. BACKGROUND

[0002] Conventional pull film drying oven such as Figure 1 As shown, the hot -blast system of conventional pull film drying oven is built -in, namely static pressure box 104, fan room 103, heater 102 and filter 101 are all in the inside of drying oven, and two fans 105 are installed on the both sides of frame 100 and occupy the operation space on both sides, and the built -in mode of hot -blast system leads to the limited inside space of conventional drying oven, can only select the low -grade thin filter, resulting in the unideal filtering effect, and the filter is difficult to install, and overall, the conventional pull film air box is large in floor space, is not suitable for installation operation in the narrow space, and the space for installing drying oven is limited in the process of drying pull film, therefore, an urgent need exists for a pull film drying oven which can be normally installed and used in the narrow space. CONTENT OF UTILITY MODEL

[0003] The problem to be solved is to provide a pull film air box with more compact structure and less floor space.

[0004] To achieve the above object, the utility model provides the following technical scheme: a hot -blast system external pull film drying oven, including heat preservation box, hot -blast system and static pressure box, static pressure box is located in the inside of heat preservation box, and the hot -blast system is located at the top of heat preservation box and is communicated with static pressure box, heat preservation box opposite both sides are equipped with film inlet and film outlet respectively, static pressure box includes upper static pressure box and lower static pressure box that are communicated through connecting air pipe, upper static pressure box and lower static pressure box are opposite air outlet, and there is a gap between the two, the gap is flush with film outlet, the hot -blast system includes circulating air pipe, and the circulating air pipe one end is equipped with fresh air opening, and the other end is connected with fan, and the fresh air opening is equipped with heater and filter between the fan, and the fan outlet is communicated with connecting air pipe.

[0005] Preferably, heat preservation box top is equipped with rack one and rack two, and the heater and filter are all installed on rack one, and the fan is installed on rack two, and the circulating air pipe is sequentially penetrated through heater and filter and connected with fan.

[0006] Preferably, upper static pressure box is hung in the inner wall of heat preservation box top and the air outlet side faces downward, and lower static pressure box is installed in the inner wall of heat preservation box bottom and the air outlet side faces upward.

[0007] Preferably, heat preservation box further includes frame, and the inner side plate is installed in the inner side of frame, and the outer sealing plate is installed on the outer side of frame, and the heat preservation cotton is installed between the inner side plate and outer sealing plate, and the heat preservation box top is equipped with air inlet and air return.

[0008] Preferably, the air return is communicated with air return, and the air return is located on the end of circulating air pipe different from fan.

[0009] Compared with the prior art, this utility model provides a film drying oven with an external hot air system, which has the following advantages: This utility model includes an insulated box body, a hot air system, and a static pressure box. The static pressure box is located inside the insulated box body, and the hot air system is located on the top of the insulated box body and communicates with the static pressure box. The way that the hot air system is located on the top of the insulated box body instead of inside it occupies less space and is suitable for installation in small spaces; moreover, the structure of this solution is compact and easier to install, and the choice of filter is not limited by the installation space. A larger filter with better filtration effect can be selected; the insulated box body is an integral piece, assembled from a frame, inner side panels, outer sealing panels, and insulation cotton, and can be installed directly on the ground. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this conventional drying oven;

[0011] Figure 2 This is a front structural diagram of the present invention;

[0012] Figure 3 This is a schematic diagram of the insulation box structure of this utility model;

[0013] Figure 4 This is a schematic diagram of the frame structure of this utility model;

[0014] Figure 5 This is a schematic diagram of the rear structure of this utility model;

[0015] Figure 6 This is a schematic diagram of the hot air system structure of this utility model;

[0016] Figure 7 This is a schematic diagram of the static pressure box structure of this utility model;

[0017] Explanation of reference numerals in the attached drawings: 1. Insulated box body; 11. Frame; 12. Inner side panel; 13. Outer sealing panel; 14. Insulation cotton; 15. Air inlet; 16. Return air inlet; 17. Membrane inlet; 18. Membrane outlet; 2. Hot air system; 21. Fan; 22. Heater; 23. Filter; 24. Circulating air duct; 25. Frame 1; 26. Frame 2; 27. Fresh air inlet; 28. Exhaust air outlet; 29. ​​Supply air outlet; 3. Static pressure box; 31. Upper static pressure box; 32. Lower static pressure box; 33. Connecting air duct; 34. Air valve actuator; 35. Hot air inlet. Detailed Implementation

[0018] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0019] As described in the background art, in confined production environments, existing film stretching ovens occupy a large area and space. Therefore, this utility model designs a film stretching oven with a smaller footprint. The hot air system 2 of this utility model's film stretching oven is located on the outside of the insulated chamber, not inside. Figures 2-7 The film drying oven shown includes an insulated box body 1, a hot air system 2, and a static pressure chamber 3. The static pressure chamber 3 is located inside the insulated box body 1, and the hot air system 2 is located at the top of the insulated box body 1 and is connected to the static pressure chamber 3. The insulated box body 1 includes a frame 11, with an inner side plate 12 installed at the bottom of the frame 11 and an outer sealing plate 13 installed on the outside of the frame 11. Insulation cotton 14 is installed between the inner side plate 12 and the outer sealing plate 13. The top of the insulated box body 1 is provided with an air inlet 15 and an air return outlet 16. The front and rear sides of the insulated box body 1 are respectively provided with a film inlet 17 and a film outlet 18. The film to be dried enters the insulated box body 1 through the film inlet 17, is dried in the static pressure chamber 3, and is discharged through the film outlet 18. The installation process of the insulated box body 1 is as follows: First, the frame 11 is welded together. After the frame 11 is welded together, the inner side plate 12 is welded to the inside of the frame 11. Then, insulation cotton 14 is laid in the hollow layer on the outside of the frame 11. Finally, the outer sealing plate 13 is welded to the outside of the frame 11.

[0020] The static pressure chamber 3 includes an upper static pressure chamber 31 and a lower static pressure chamber 32, which are connected by a connecting air duct 33. The connecting air duct 33 is equipped with an air valve actuator 34 and a hot air inlet 35. The upper static pressure chamber 31 and the lower static pressure chamber 32 have air outlets facing each other with a gap between them. The gap is flush with the film outlet 18 to allow the film to pass through smoothly. The upper static pressure chamber 31 is suspended on the inner wall of the top of the insulation box 1 with its air outlet side facing down, and the lower static pressure chamber 32 is installed on the inner wall of the bottom of the insulation box 1 with its air outlet side facing up. Both the upper static pressure chamber 31 and the lower static pressure chamber 32 are equipped with guide plates and air distribution plates, and perforated plates are provided on the air outlet surfaces. Hot air is blown onto both sides of the film through the oppositely arranged perforated plates for drying. The installation process of the static pressure box 3 is as follows: First, the upper static pressure box 31, the lower static pressure box 32, and the connecting air duct 33 are welded together; then the upper static pressure box 31 is suspended from the inner wall of the top of the insulation box 1 by four M20 screw rods, and the lower static pressure box 32 is seated on the inner wall of the bottom of the insulation box 1 by four M20 screw rods; after that, the connecting air duct 33 is connected to the upper static pressure box 31 and the lower static pressure box 32, and its hot air inlet 35 is connected to the air inlet 15. The air valve actuator 34 is installed on the connecting air duct 33.

[0021] The hot air system 2 includes a fan 21, a heater 22, a filter 23, a circulating air duct 24, a fresh air inlet 27, an exhaust outlet 28, and a supply air outlet 29. The heater 22 and the filter 23 are fixed to the top of the insulation box 1 via a frame 1 25, and the fan 21 is fixed to the top of the insulation box 1 via a frame 26. Both the frame 1 25 and the frame 26 are located on the top of the insulation box 1. One end of the circulating air duct 24 is an exhaust outlet 28, and the other end is connected to the fan 21. The exhaust outlet 28 is connected to the return air inlet 16. The outlet of the fan 21 is the supply air outlet 29, which is connected to the hot air inlet 35 via the air inlet 15. That is, the outlet of the fan 21 is connected to the connecting duct 33. A fresh air inlet 27 is provided between the exhaust outlet 28 and the fan 21 in the circulating air duct 24. Between the fresh air inlet 27 and the fan 21 are the heater 22 and the filter 23. Since there is sufficient space between the heater 22 and the static pressure box 3, a filter with good filtration effect is selected for the filter 23, and even though it is relatively large, there is enough space to accommodate it. The first end of the circulating air duct 24 is connected to the return air inlet 16, then passes through the heater 22 and the filter 23 in sequence, and finally connects to the fan 21. The fan 21 delivers the filtered hot air into the static pressure box 3. The installation process of the hot air system 2 is as follows: First, weld the outer shell of the filter 23, all pipes of the circulating air duct 24, frame one 25, and frame two 26 together; then, bolt frame one 25 and frame two 26 to the top of the insulation box 1, and connect the fan 21, heater 22, and filter 23 to the respective pipes of the circulating air duct 24.

[0022] When using, follow the above installation steps to complete the installation of the oven; after installation, power on and test. First turn on the fan 21, then start the heater 22. Hot air is sent into the connecting air pipe 33 of the static pressure box 3 through the circulating air pipe 24. The hot air is then distributed to the upper static pressure box 31 and the lower static pressure box 32 through the connecting air pipe 33. Both the upper static pressure box 31 and the lower static pressure box 32 are equipped with guide plates and air distribution plates. The air outlet surface is equipped with a perforated plate. After the hot air is jetted through the perforated plate, it mixes and converges, and blows towards the film at a uniform speed and steadily, which makes the wind speed and temperature uniformity better. Through the centrifugal force of the fan 21, the hot air inside the insulation box 1 enters the circulating air duct 24 through the return air inlet 16 of the insulation box 1. The circulating air duct 24 is equipped with an exhaust outlet 28 and a fresh air inlet 27. The exhaust outlet 28 discharges a small amount of hot air, and the fresh air inlet 27 draws in a small amount of fresh air. The large amount of hot air that is not discharged mixes with the fresh air and is then heated by the heater 22 before being sent to the filter 23. The filtered hot air is then sent to the static pressure box 3 inside the insulation box 1 by the fan 21. This process is repeated to form a circulating hot air system, continuously blowing hot air onto the surface of the film, thereby achieving a drying effect. This invention places the hot air system 2 externally on the top of the insulated box 1, and the static pressure box 3 is connected to the hot air system 2 and installed inside the insulated box 1. The insulated box of this invention is easy to install, saving time and effort. The hot air system is externally placed on the top of the insulated box, making full use of the high space and achieving the requirement of small footprint. Due to the large space at the top, a higher grade filter can be selected to improve the filtration accuracy.

[0023] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A film drying oven with an external hot air system, comprising an insulated chamber (1), a hot air system (2), and a static pressure chamber (3), characterized in that: The static pressure box (3) is located inside the insulation box (1), and the hot air system (2) is located on the top of the insulation box (1) and connected to the static pressure box (3). The insulation box (1) is provided with a film inlet (17) and a film outlet (18) on opposite sides. The static pressure box (3) includes an upper static pressure box (31) and a lower static pressure box (32) connected by a connecting air duct (33). The upper static pressure box (31) and the lower static pressure box (32) have air outlets opposite each other and there is a gap between them. The gap is flush with the film outlet (18). The hot air system (2) includes a circulating air duct (24). One end of the circulating air duct (24) is provided with a fresh air inlet (27) and the other end is connected to a fan (21). A heater (22) and a filter (23) are provided between the fresh air inlet (27) and the fan (21). The outlet of the fan (21) is connected to the connecting air duct (33).

2. The film drying oven with an external hot air system as described in claim 1, characterized in that: The top of the insulation box (1) is provided with frame one (25) and frame two (26). The heater (22) and filter (23) are both installed on frame one (25), and the fan (21) is installed on frame two (26). The circulating air duct (24) passes through the heater (22) and filter (23) in sequence and is connected to the fan (21).

3. The film drying oven with an external hot air system as described in claim 2, characterized in that: The upper static pressure box (31) is suspended on the inner wall of the top of the insulation box (1) with the air outlet side facing down, and the lower static pressure box (32) is installed on the inner wall of the bottom of the insulation box (1) with the air outlet side facing up.

4. The film drying oven with an external hot air system as described in claim 1, characterized in that: The insulated box (1) also includes a frame (11), an inner side plate (12) is installed on the inner side of the frame (11), an outer sealing plate (13) is installed on the outer side of the frame (11), and insulation cotton (14) is installed between the inner side plate (12) and the outer sealing plate (13); the top of the insulated box (1) is provided with an air inlet (15) and an air return outlet (16).

5. The film drying oven with an external hot air system as described in claim 4, characterized in that: There is an exhaust vent (28) connected to the return air vent (16), and the exhaust vent (28) is located at one end of the circulating air duct (24) that is different from the fan (21).

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