CN113001850B - High-temperature waste gas cold-heat exchange device of polyimide film casting machine - Google Patents

Abstract

The invention relates to the technical field of heat exchange devices, and provides a high-temperature waste gas cold and heat exchange device of a polyimide film casting machine, which comprises a bottom plate, baffle plates and a blast pipe, wherein the baffle plates are arranged on the bottom plate and close to two ends of the bottom plate; a heat exchange pipe is arranged in the air supply pipe, and a space is reserved between the heat exchange pipe and the air supply pipe; the heat exchanger is characterized in that two ends of the heat exchange tube extend out of the air supply tube, one end of the air supply tube is hermetically connected with the heat exchange tube, the other end of the air supply tube forms an air inlet, and a plurality of air outlet holes are formed in the air supply tube corresponding to the radiating fins. Compared with the existing heat exchange device, the high-temperature waste gas cold-heat exchange device for the polyimide film casting machine provided by the invention greatly improves the heat exchange efficiency.

Description

High-temperature waste gas cold-heat exchange device of polyimide film casting machine

Technical Field

The invention relates to the technical field of compensation air inlet, in particular to a high-temperature waste gas cold-heat exchange device of a polyimide film casting machine.

Background

Polyimide film is one of the earliest products of polyimide, and is used for slot insulation of motors and cable wrapping materials. Polyimide film's among the prior art preparation is usually extruded polyamide acid solution through the extruder to the casting machine, forms the membrane after through the casting of casting machine, stretching, and at the in-process of filming, the high temperature waste gas that produces need cool off fast so that handle or utilize, and current high temperature waste gas heat transfer is mainly realized through the fin of heat exchanger, and this kind of mode heat transfer effect is relatively poor, how to improve heat exchange efficiency, and people are studying always.

Disclosure of Invention

The invention aims to provide a high-temperature waste gas cold-heat exchange device so as to be convenient for quickly exchanging heat for high-temperature waste gas of a polyimide film casting machine.

The above object of the present invention can be achieved by the following technical solutions:

the invention provides a high-temperature waste gas cold and heat exchange device of a polyimide film casting machine, which comprises a bottom plate, wherein baffle plates are arranged on the bottom plate close to two ends of the bottom plate, a plurality of radiating fins are arranged between the baffle plates, and the high-temperature waste gas cold and heat exchange device also comprises an air supply pipe, wherein the air supply pipe penetrates through the baffle plates and the radiating fins and is connected with the baffle plates and the radiating fins; a heat exchange pipe is arranged in the air supply pipe, and a space is reserved between the heat exchange pipe and the air supply pipe; the heat exchanger is characterized in that two ends of the heat exchange tube extend out of the air supply tube, one end of the air supply tube is hermetically connected with the heat exchange tube, the other end of the air supply tube forms an air inlet, and a plurality of air outlet holes are formed in the air supply tube corresponding to the radiating fins.

In some embodiments of the invention, the heat sink is coupled to the baffle.

In some embodiments of the invention, the heat sink extends into the air supply pipe and is connected with the heat exchange pipe; and the heat dissipation sheet is provided with a ventilation opening.

In some embodiments of the present invention, a plurality of cooling fins located on the same cross section are circumferentially disposed on the air supply pipe; the radiating fins comprise a first radiating part and a second radiating part, the width of the first radiating part is larger than that of the second radiating part, and the second radiating part extends into the air supply pipe and is connected with the heat exchange pipe.

In some embodiments of the present invention, a central hole is formed on the heat dissipation plate, a plurality of fixing pieces are connected to an inner side surface of the heat dissipation plate, and are circumferentially arranged in the central hole, and a space is formed between every two adjacent fixing pieces; the fixing piece extends into the air supply pipe and is connected with the heat exchange pipe.

In some embodiments of the invention, the air supply duct is plural.

In some embodiments of the invention, the air supply duct is arranged in parallel with the bottom plate; the baffle is perpendicular to the bottom plate.

In some embodiments of the invention, the axis of the air outlet is perpendicular to the axis of the air supply pipe.

In some embodiments of the present invention, air outlets are disposed between adjacent cooling fins and between the cooling fins and the baffle.

In some embodiments of the present invention, the bottom plate is provided with fixing holes at both sides thereof.

When the high-temperature waste gas cold and heat exchange device of the polyimide film casting machine is used, two ends of a heat exchange tube are connected with a liquid supply device to form a liquid supply loop, the liquid supply device supplies cooling liquid such as cold water to the heat exchange tube, an air inlet of an air supply tube is connected with a fan, the fan is connected with a casting machine to guide high-temperature waste gas into the air supply tube, the high-temperature waste gas is discharged through an air outlet after passing through the air supply tube, in the process of discharging the high-temperature waste gas, the cooling liquid forms heat exchange on the high-temperature waste gas on the inner side, a cooling fin is in contact with the air supply tube on the outer side to dissipate the high-temperature waste gas, and the high-temperature waste gas is further subjected to heat exchange with the cooling fin after being discharged through the air outlet, so that the heat exchange efficiency is greatly improved compared with the existing heat exchange device.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a high-temperature exhaust gas heat-exchange device of a polyimide film casting machine according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a second partial schematic view of the structure of FIG. 1;

FIG. 4 is a schematic view of an arrangement of heat exchange tubes;

FIG. 5 is a second schematic structural diagram of a high-temperature exhaust gas heat-exchange device of a polyimide film casting machine according to an embodiment of the present invention;

FIG. 6 is a schematic view of the mounting structure of the heat sink of FIG. 5;

FIG. 7 is a schematic structural diagram of a heat sink in an embodiment;

FIG. 8 is a schematic view of a heat sink mounting structure;

FIG. 9 is a second schematic view of the mounting structure of the heat sink;

the reference numbers illustrate:

1. a base plate;

2. a baffle plate;

3. a heat sink; 3-1, a first heat sink portion; 3-2, a second heat sink; 3-3, a middle hole; 3-4, fixing a sheet;

4. an air supply pipe;

5. a heat exchange pipe;

6. an air outlet;

7. a vent;

8. and (7) fixing holes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1 to 3, the present invention provides a high temperature exhaust gas heat and cold exchanger for a polyimide film casting machine, which includes a bottom plate 1 and an air supply pipe 4, wherein two sides of the bottom plate are provided with fixing holes 8 for fixing the device, the bottom plate is provided with baffles 2 near two ends, and a common baffle can be integrally formed with the bottom plate, or can be fixed by welding or other existing methods without specific limitation; a plurality of radiating fins 3 are uniformly arranged between the two baffles, the blast pipe penetrates through the baffles and the radiating fins and is connected with the baffles and the radiating fins, and the blast pipe is arranged in parallel with the bottom plate; the baffle is perpendicular to the bottom plate; a heat exchange tube 5 is arranged in the blast tube, and a space is reserved between the heat exchange tube and the blast tube; two ends of the heat exchange tube extend out of the air supply tube, one end of the air supply tube is hermetically connected with the heat exchange tube, the other end of the air supply tube forms an air inlet, a plurality of air outlet holes 6 are formed in the air supply tube corresponding to the radiating fins, air outlet holes are formed between every two adjacent radiating fins in the embodiment and between the radiating fins and the baffle, and the air outlet holes are arranged in groups; and the axis of the air outlet is vertical to the axis of the air supply pipe.

In this embodiment, the fin is connected with the baffle to increase the fastness of fin, can also set up the fixed plate between the top of two baffles, be connected the top and the fixed plate of fin, in order to further increase the fastness of fin, can also set up the wind hole on the fixed plate of course so that the fin heat dissipation.

It should be noted that there are various ways for extending the air supply pipe from the two ends of the heat exchange pipe, fig. 1 is only one way, and the two ends of the heat exchange pipe can also vertically penetrate the heat exchange pipe, see fig. 4, for convenient use; the air supply pipe can be generally provided in plurality to improve the heat exchange efficiency and the firmness of the radiating fins.

When the high-temperature waste gas cold and heat exchange device of the polyimide film casting machine is used, the two ends of the heat exchange tube are connected with the liquid supply device to form a liquid supply loop, the liquid supply device supplies cooling liquid for the heat exchange tube, for example, cold water is supplied to the heat exchange tube, an air inlet of the blast pipe is connected with the fan, the fan is connected with the casting machine to guide high-temperature waste gas into the blast pipe, the high-temperature waste gas is discharged through the air outlet after entering the blast pipe, in the high-temperature waste gas discharging process, the cooling liquid forms heat exchange for the high-temperature waste gas on the inner side, the cooling fins are contacted with the blast pipe to form heat dissipation for the high-temperature waste gas on the outer side, and the high-temperature waste gas is further subjected to heat exchange with the cooling fins after being discharged through the air outlet, and therefore, the heat exchange efficiency is greatly improved compared with the existing heat exchange device.

The device can also be used in fixed ventilation devices or exhaust gas treatment devices.

The high-temperature waste gas cold-heat exchange device of the polyimide film casting machine has the following advantages:

1. the heat exchange efficiency is high: the above description is omitted for brevity;

2. the heat radiating fins are fixed firmly: the air supply pipe has a protection effect on the radiating fins while supplying air and exchanging heat, and the radiating fins are prevented from deforming under the influence of vibration and the like;

3. impact the fin when can prevent high temperature exhaust emission, prevent that the fin from receiving high temperature air current when the temperature is higher and assaulting and warping: the axis of the air outlet hole perpendicular to the axis of the air supply pipe is perpendicular to the radiating fins when high-temperature gas is exhausted, the radiating fins are not directly impacted, and in the running process of the high-temperature gas, gas on two sides of the radiating fins moves along with the radiating fins, so that the radiating fins are not easy to deform towards any side, and the radiating effect is prevented from being influenced by the deformation of the radiating fins.

Example two:

the second embodiment has substantially the same structure as the first embodiment, except that: the radiating fins extend into the air supply pipe and are connected with the heat exchange pipe; a plurality of ventilation openings 7 are formed in the radiating fins, and referring to fig. 6, for convenience of manufacturing, referring to fig. 5 and 6, a plurality of radiating fins on the same cross section can be circumferentially arranged on the air supply pipe;

this polyimide film casting machine high temperature waste gas cold and hot heat exchange device has two kinds of using-way:

the use mode 1 is the same as that of the embodiment 1, but the cooling liquid cools the high-temperature waste gas and simultaneously dissipates heat due to the connection of the cooling fins and the heat exchange tubes, so that the heat dissipation of the heat exchange fins is faster, and the heat exchange effect of the high-temperature waste gas is further improved;

in the use mode 2, one end of the heat exchange tube is connected with the fan, the fan is connected with the slobbering machine to guide high-temperature waste gas into the heat exchange tube, the high-temperature waste gas is discharged outwards through the other end of the heat exchange tube, and the air inlet of the blast pipe is connected with the high-pressure water supply device to atomize the liquid sprayed out of the air outlet, so that the high-pressure water and the cooling fins exchange heat with the high-temperature waste gas at the same time, the atomized liquid and the heat exchange fins exchange heat outside the blast pipe, and the high-pressure water exchanges heat with the cooling fins inside the blast pipe, so that the heat exchange effect is greatly improved.

Example three:

the third embodiment has substantially the same structure as the second embodiment, except that: the heat sink is not provided with a vent, but is designed as follows, referring to fig. 7, the heat sink comprises a first heat sink part 3-1 and a second heat sink part 3-2, the width of the first heat sink part is larger than that of the second heat sink part, and the second heat sink part extends into the air supply pipe and is connected with the heat exchange pipe.

Example four:

the third embodiment has substantially the same structure as the second embodiment, except that: the heat radiating fins are not provided with ventilation openings, and are designed as follows, referring to fig. 8 and 9, the heat radiating fins are provided with a plurality of middle holes 3-3, referring to fig. 8; the number of the radiating fins can be 1, and referring to fig. 9, a central hole is formed in the central position of each radiating fin; the inner side surface of each radiating fin is connected with a plurality of fixing pieces 3-4, the fixing pieces are circumferentially arranged in the middle hole, and a space is reserved between every two adjacent fixing pieces so as to facilitate the passage of gas or liquid; the fixing piece extends into the air supply pipe and is connected with the heat exchange pipe.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A high-temperature waste gas cold-heat exchange device of a polyimide film casting machine comprises a bottom plate (1), baffle plates (2) are arranged on the bottom plate near two ends, a plurality of radiating fins (3) are arranged between the baffle plates, and the device is characterized in that,

the air supply pipe (4) penetrates through the baffle and the radiating fins and is connected with the baffle and the radiating fins;

a heat exchange tube (5) is arranged in the air supply tube, and a space is reserved between the heat exchange tube and the air supply tube; the two ends of the heat exchange tube extend out of the air supply tube, one end of the air supply tube is hermetically connected with the heat exchange tube, the other end of the air supply tube forms an air inlet, and a plurality of air outlet holes (6) are formed in the air supply tube corresponding to the radiating fins;

the radiating fins extend into the air supply pipe and are connected with the heat exchange pipe;

the heat sink is provided with a vent (7).

2. The polyimide film casting machine high-temperature exhaust gas heat and cold exchanging device according to claim 1, wherein the heat radiating fins are connected with the baffle.

3. The polyimide film casting machine high-temperature exhaust gas heat and cold exchanging device according to claim 1, wherein the number of the air supply pipes is plural.

4. The polyimide film casting machine high-temperature exhaust gas heat and cold exchanging device according to claim 1, wherein the blast pipe is arranged in parallel with the bottom plate;

the baffle is perpendicular to the bottom plate.

5. The polyimide film casting machine high-temperature exhaust gas heat and cold exchanging device according to claim 4, wherein an axis of the air outlet is perpendicular to an axis of the air supply pipe.

6. The polyimide film casting machine high-temperature exhaust gas heat and cold exchanging device according to claim 1, wherein air outlet holes are formed between adjacent cooling fins and between the cooling fins and the baffle.

7. The polyimide film slobbering machine high-temperature exhaust gas heat and cold exchanging device according to claim 1, wherein fixing holes (8) are formed in two sides of the bottom plate.

8. A high-temperature waste gas cold-heat exchange device of a polyimide film casting machine comprises a bottom plate (1), baffle plates (2) are arranged on the bottom plate near two ends, a plurality of radiating fins (3) are arranged between the baffle plates, and the device is characterized in that,

the air supply pipe (4) penetrates through the baffle and the radiating fins and is connected with the baffle and the radiating fins;

a heat exchange tube (5) is arranged inside the air supply tube, and a space is reserved between the heat exchange tube and the air supply tube; the two ends of the heat exchange tube extend out of the air supply tube, one end of the air supply tube is hermetically connected with the heat exchange tube, the other end of the air supply tube forms an air inlet, and a plurality of air outlet holes (6) are formed in the air supply tube corresponding to the radiating fins;

a plurality of radiating fins positioned on the same cross section are circumferentially arranged on the blast pipe;

the radiating fin comprises a first radiating part (3-1) and a second radiating part (3-2), the width of the first radiating part is larger than that of the second radiating part, and the second radiating part extends into the air supply pipe and is connected with the heat exchange pipe.

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