A hot air circulating device

Abstract

The utility model belongs to the production technical field of hole membrane, concretely is a kind of hot air circulation device, including oven main body, the inside of oven main body is evenly provided with first pipeline and second pipeline, the second pipeline is movably inserted in the inside of first pipeline, the outside of first pipeline and second pipeline is evenly provided with multiple air outlet holes at equal distance, and two groups the first pipeline and second pipeline between membrane are provided with;By setting electric telescopic rod, when hot air fan starts, the telescopic of electric telescopic rod can be controlled, the second pipeline is intermittently shrunk to the inside of first pipeline, so that air outlet hole can be intermittently blocked, so that the purpose of intermittent heating can be realized, prevent hot air from blowing to membrane continuously and cause the damage of membrane, by the back and forth shrinkage of second pipeline, the wind direction of hot air can also be changed, so that the temperature in the inside of oven main body is more uniform.

Description

Technical Field

[0001] This utility model belongs to the field of porous membrane production technology, specifically a hot air circulation device. Background Technology

[0002] Polytetrafluoroethylene (PTFE) microporous membranes are high-performance membrane materials with tiny pores, commonly used in applications such as filtration, separation, and air permeation. They are made of polytetrafluoroethylene, which has excellent chemical stability, high temperature resistance, aging resistance, and low friction properties, making it an ideal material in many industrial and scientific research fields. High-temperature ovens are required in the production process of PTFE microporous membranes.

[0003] For example, Chinese patent CN212826391U provides a circulating air system for an expander, comprising an intake duct, a fan, and an outlet duct connected in sequence; the fan is located outside the oven, while the intake and outlet ducts are located inside the oven; the outlet duct includes a first horizontal pipe and a first inclined pipe connected in sequence, with one end of the first inclined pipe connected to a first connecting part of the fan; the intake duct includes a second horizontal pipe and a second inclined pipe connected in sequence, with one end of the second inclined pipe connected to a second connecting part of the fan; the first and second connecting parts are located outside the oven, and their outer surfaces are both covered with an insulation layer. This circulating air system for an expander reduces heat loss during airflow by placing the outlet and intake ducts inside the oven, and the insulation layer covering the outer surfaces of the first and second connecting parts further reduces heat loss.

[0004] The above technical solution still has some problems in actual use. For example, when in use, the first horizontal pipe and the second horizontal pipe are fixed, and their lengths are also fixed. During the air outlet process, the air direction and the range involved are also fixed. This results in the temperature inside the oven being uneven when the film passes under the two pipes, which causes damage to the film.

[0005] Therefore, a hot air circulation device is proposed to address the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies and solve the problem of uneven temperature inside existing ovens, which causes damage to the film, a hot air circulation device is proposed.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The hot air circulation device of this utility model includes an oven body. The oven body has a first pipe and a second pipe arranged at both the top and bottom. The second pipe is movably inserted into the inside of the first pipe. The outside of the first pipe and the second pipe are provided with multiple air outlets at equal intervals. A thin film is provided between the two sets of first pipes and second pipes. Hot air blowers are installed on the top and bottom surfaces of the oven body. The air outlet of the hot air blower is connected to one end of the first pipe through a conveying pipe.

[0008] Preferably, a fixing ring is fixedly sleeved on the outer surface of one end of the second pipe, and a connecting plate is fixedly installed on the outer circumferential surface of the fixing ring. An electric telescopic rod is fixedly connected between one side surface of the connecting plate and one side inner wall of the oven body.

[0009] Preferably, a connecting rod is fixedly connected to one side surface of the connecting plate, and a plurality of actuating plates are provided on the outer surface of the connecting rod.

[0010] Preferably, the actuating plates are equidistantly mounted on the outer surface of the connecting rod, and the actuating plates are rectangular in shape.

[0011] Preferably, support legs are fixedly installed at the four corners of the bottom surface of the oven body, and support pads are fixedly installed on the bottom surface of each support leg.

[0012] Preferably, the front surface of the oven body is fitted with an inspection door via a hinge, and the inspection door has an observation window inside.

[0013] The beneficial effects of this utility model are: This utility model provides a hot air circulation device. By setting an electric telescopic rod, when the hot air blower is started, the extension and retraction of the electric telescopic rod can be controlled to drive the second pipe to retract intermittently into the first pipe, so that the air outlet can be intermittently blocked, thereby achieving the purpose of intermittent heating and preventing hot air from continuously blowing on the film and causing damage to the film. The back and forth retraction of the second pipe can also change the direction of the hot air, thereby making the internal temperature of the oven body more uniform.

[0014] This utility model provides a hot air circulation device. By setting a toggle plate and a connecting rod, when the electric telescopic rod drives the second pipe to retract back and forth, it can also synchronously drive the connecting rod and the toggle plate to move back and forth inside the oven body. During the movement, it can move the hot air inside the oven body, so that the hot air can be more evenly distributed inside the oven body, thereby further improving the drying effect on the film. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a three-dimensional view of the entire utility model; Figure 2 This is a schematic diagram of the internal structure of the oven in this utility model; Figure 3 This is a schematic diagram of the bottom structure of the oven in this utility model; Figure 4 This is a schematic diagram of the first and second pipe structures in this utility model.

[0016] Legend: 1. Oven body; 2. Inspection door; 3. Observation window; 4. Film; 5. Support legs; 6. Support feet; 7. Hot air blower; 8. Conveying pipe; 9. First pipe; 10. Second pipe; 11. Air outlet; 12. Fixing ring; 13. Connecting plate; 14. Electric telescopic rod; 15. Actuating plate; 16. Connecting rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Specific implementation examples are given below.

[0019] Please see Figure 1 - Figure 4 This utility model provides a hot air circulation device, including an oven body 1. The oven body 1 has a first pipe 9 and a second pipe 10 arranged on both the upper and lower sides. The second pipe 10 is movably inserted into the first pipe 9. The exterior of the first pipe 9 and the second pipe 10 are provided with multiple air outlets 11 at equal intervals. A thin film 4 is provided between the two sets of first pipes 9 and second pipes 10. A hot air blower 7 is installed on the top and bottom surfaces of the oven body 1. The air outlet of the hot air blower 7 is connected to one end of the first pipe 9 through a conveying pipe 8. A fixing ring 12 is fixedly sleeved on the outer surface of one end of the second pipe 10. A connecting plate 13 is fixedly installed on the outer circumference of the fixing ring 12. An electric telescopic rod 14 is fixedly connected between one side surface of the connecting plate 13 and one side inner wall of the oven body 1.

[0020] During operation, when the film 4 needs to be dried, the two hot air blowers 7 are started first. During the start of the two hot air blowers 7, the generated hot air can be transported to the inside of the first pipe 9 through the conveying pipe 8 and enter the inside of the second pipe 10. Finally, it is sprayed into the inside of the oven body 1 through the air outlet 11. That is, when the film 4 passes between the two sets of second pipes 10 and the first pipe 9, both sides of the film 4 can be dried at the same time.

[0021] Furthermore, when the hot air blower 7 is started, the extension and retraction of the electric telescopic rod 14 can be controlled to cause the second pipe 10 to retract intermittently into the first pipe 9. Since the distance between the air outlets 11 on the first pipe 9 and the second pipe 10 is the same, and the opening direction of the air outlets 11 on the first pipe 9 and the second pipe 10 is consistent, the air outlets 11 can be intermittently blocked, thereby achieving the purpose of intermittent heating and preventing hot air from continuously blowing onto the film 4 and causing damage to the film 4. The back-and-forth retraction of the second pipe 10 can also change the direction of the hot air, thereby making the internal temperature of the oven body 1 more uniform.

[0022] The air outlet area can be adjusted by interlocking the first pipe 9 and the second pipe 10, allowing for flexible adjustment of the air outlet flow rate. Figure 4 As shown, when the first pipe 9 and the second pipe 10 are pre-set to have two overlapping air outlets, the telescopic rod 14 can be moved slightly to adjust the opening and closing of four holes at the same time. Therefore, by pre-setting the number of overlapping air outlets of the first pipe 9 and the second pipe 10, the air flow rate can be flexibly adjusted.

[0023] Support legs 5 are fixedly installed at the four corners of the bottom surface of the oven body 1, and support pads 6 are fixedly installed on the bottom surface of the support legs 5. An inspection door 2 is installed on the front surface of the oven body 1 via a hinge, and an observation window 3 is provided inside the inspection door 2.

[0024] During operation, the inspection door 2 and the observation window 3 can seal the inside of the oven body 1 to prevent heat loss, and the observation window 3 can also be used to conveniently observe the drying process inside the oven body 1.

[0025] Furthermore, such as Figure 1-4 As shown, a connecting rod 16 is fixedly connected to one side surface of the connecting plate 13. Multiple actuating plates 15 are provided on the outer surface of the connecting rod 16. The actuating plates 15 are equidistantly sleeved on the connecting rod 16 and have a rectangular structure.

[0026] During operation, as the electric telescopic rod 14 drives the second pipe 10 to retract back and forth, it can also simultaneously drive the connecting rod 16 and the agitator plate 15 to move back and forth inside the oven body 1. During the movement, it can agitate the hot air inside the oven body 1, so that the hot air can be more evenly distributed inside the oven body 1, thereby further improving the drying effect on the film 4.

[0027] like Figure 2 and Figure 3 As shown, when the first pipe 9 and the second pipe 10 are installed, the orientation of the air outlet 11 can be changed according to the actual usage requirements. When the orientation of the air outlet 11 is opposite to that of the film 4, the hot air does not directly act on the film when it enters the drying oven, which is suitable for films with a smaller thickness. Conversely, it is suitable for films with a thicker thickness.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A hot air circulation device, comprising an oven body (1), characterized in that: The oven body (1) is provided with a first pipe (9) and a second pipe (10) on both the top and bottom. The second pipe (10) is movably inserted into the first pipe (9). The first pipe (9) and the second pipe (10) are provided with multiple air outlets (11) at equal intervals on the outside. A thin film (4) is provided between the two sets of the first pipe (9) and the second pipe (10). A hot air blower (7) is installed on the top and bottom surfaces of the oven body (1). The air outlet of the hot air blower (7) is connected to one end of the first pipe (9) through a conveying pipe (8).

2. The hot air circulation device according to claim 1, characterized in that: A fixing ring (12) is fixedly sleeved on the outer surface of one end of the second pipe (10). A connecting plate (13) is fixedly installed on the outer circumference of the fixing ring (12). An electric telescopic rod (14) is fixedly connected between one side surface of the connecting plate (13) and one side inner wall of the oven body (1).

3. A hot air circulation device according to claim 2, characterized in that: A connecting rod (16) is fixedly connected to one side surface of the connecting plate (13), and a plurality of toggle plates (15) are provided on the outer surface of the connecting rod (16).

4. A hot air circulation device according to claim 3, characterized in that: The actuating plate (15) is installed at equal intervals on the outer surface of the connecting rod (16), and the actuating plate (15) is rectangular.

5. A hot air circulation device according to claim 4, characterized in that: Support legs (5) are fixedly installed at the four corners of the bottom surface of the oven body (1), and support pads (6) are fixedly installed on the bottom surface of the support legs (5).

6. A hot air circulation device according to claim 5, characterized in that: The front surface of the oven body (1) is fitted with an inspection door (2) via a hinge, and an observation window (3) is provided inside the inspection door (2).

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