Intermediate distributor device and carbon fiber pre-oxidation furnace
By designing the circulating air distribution chamber and inclined air guide wall in a carbon fiber pre-oxidation furnace, the distribution of air outlets is adjusted, the problem of insufficient wind field uniformity is solved, the uniformity of wind field and temperature field is achieved, and the product consistency is improved Sex and safety.
Patent Information
- Application Number
- CN202421011189.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-10
AI Technical Summary
In the existing carbon fiber pre-oxidation furnace, the structure of the intermediate distributor leads to insufficient wind field uniformity, resulting in weakening of wind force at different locations, affecting the temperature uniformity and product consistency in the furnace chamber.
An intermediate distributor device is designed, using a circulating air distribution chamber and an inclined air guide wall. Non-uniformly distributed air outlet holes are provided on the air outlet side wall. Through the design of the inclined air guide wall and the air outlet side wall, the output is gradually reduced. The number and spacing of air holes are adjusted to adjust the flow rate and make the wind field more uniform.
It effectively improves the uniformity of the air flow velocity at the outlet of the intermediate distributor, ensures the uniformity of the wind field, and prevents excessive temperatures in local areas and fires.
Smart Images
Figure CN222187829U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of carbon fiber production equipment, in particular to an intermediate distributor device and a carbon fiber pre-oxidation furnace. Background Art
[0002] The preoxidation furnace is an important equipment in the carbon fiber production process. The preoxidation furnace adopts a hot air circulation structure. The intermediate distributor in this structure plays an important role in the uniformity of the wind field and temperature field in the furnace cavity. Good uniformity of the wind field and temperature field can ensure the consistency of the product during the preoxidation yarn production process, and at the same time prevent the temperature in the local area of the furnace cavity from being too high, causing a fire.
[0003] In the prior art, for example, a Chinese invention patent with publication number CN114411286A disclosed on April 29, 2022, a carbon fiber pre-oxidation furnace with airflow from the middle to the two ends, wherein the central distributor disclosed therein is provided with a plurality of air guide plates to blow the wind from the middle to the two ends;
[0004] However, the inventors found that this structural form would result in inconsistent air volume blowing toward both sides due to the distance from the air inlet. After the air outlet farther from the air inlet changes direction through the air guide plate, the wind force would weaken, thereby affecting the uniformity of the wind field. Utility Model Content
[0005] In view of at least one of the above technical problems, the utility model provides an intermediate distributor device and a carbon fiber pre-oxidation furnace, which adopt structural improvements to improve the uniformity of the wind field.
[0006] According to a first aspect of the utility model, an intermediate distributor device is provided, a shell, wherein the shell has a circulating air distribution chamber inside, wherein the circulating air distribution chamber has an air inlet, an inclined air guide wall, and an air outlet side wall, wherein a starting end of the inclined air guide wall is connected to one side of the air inlet and extends in a direction away from the air inlet, and the other end of the inclined air guide wall is inclined in a direction toward the other side of the air inlet, and one end of the air outlet side wall is connected to the other side of the air inlet, and the other end extends in a direction away from the air inlet and is connected to an end of the inclined air guide wall away from the air inlet;
[0007] There are a plurality of air outlet holes distributed on the air outlet side wall, and the plurality of air outlet holes are arranged in a decreasing direction from away from the air inlet to close to the air inlet.
[0008] In some embodiments of the present invention, the circulating air distribution chamber is arranged in a right-angled triangle, the inclined air guide wall is on the hypotenuse, and the air inlet and the air outlet side wall are on the right-angled side.
[0009] In some embodiments of the utility model, the plurality of air outlet holes are evenly distributed in several areas on the air outlet side wall along the direction toward the air inlet, the air outlet holes in each area are evenly arranged, and the spacing between the air outlet holes in the area gradually increases in the direction toward the air inlet.
[0010] In some embodiments of the present invention, the plurality of air outlet holes are arranged in a plurality of rows on the air outlet side wall, and the distance between two adjacent rows gradually increases toward the direction close to the air inlet.
[0011] In some embodiments of the utility model, the plurality of air outlet holes are arranged in multiple rows on the air outlet side wall, the spacing between each row is the same, and the spacing between two adjacent air outlet holes in each row gradually increases towards the direction close to the air inlet.
[0012] According to the second aspect of the utility model, a carbon fiber pre-oxidation furnace is also provided, comprising:
[0013] A main chamber, wherein the main chamber has an intermediate distributor as described in any one of the first aspects;
[0014] A side furnace, one end of which is in communication with a side of the main chamber away from the middle distributor, and the other end of which is in communication with an air inlet of the middle distributor;
[0015] a fan, arranged in the side furnace, for blowing the airflow sucked from the main chamber into the intermediate distributor;
[0016] Wherein, the air outlet side wall of the intermediate distributor is arranged toward the main chamber.
[0017] In some embodiments of the present invention, the intermediate distributor is vertically arranged to the main chamber, and the length of the air outlet side wall is adapted to the width of the main chamber.
[0018] In some embodiments of the present invention, the main chamber adopts an end-to-end hot air circulation structure, and the intermediate distributor is located at one end of the main chamber.
[0019] In some embodiments of the utility model, the main chamber adopts a hot air circulation structure from the middle to both ends, the intermediate distributor is located in the middle of the main chamber, and two intermediate distributors are provided, and the air outlet side walls of the two intermediate distributors discharge air in opposite directions.
[0020] In some embodiments of the present invention, the main chamber adopts a top-to-bottom hot air circulation structure, and the intermediate distributor is located at the top of the main chamber.
[0021] The beneficial effects of the utility model are as follows: the utility model can achieve a certain uniform distribution effect on the circulating air entering the circulating air distribution chamber through the design of the inclined side wall in the circulating air distribution chamber, and the air outlet holes on the air outlet side wall are arranged non-uniformly, so that the number of orifice plates gradually decreases from away from the air inlet, which can effectively reduce the flow velocity at the air outlet side wall close to the air inlet and increase the flow velocity on the air outlet side wall away from the air inlet, thereby ensuring the uniformity of the air flow velocity at the outlet of the intermediate distributor device. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 This is a schematic diagram of the structure of the intermediate distributor device in the embodiment of the utility model;
[0024] Figure 2 This is a front view of the air outlet side wall in the embodiment of the utility model;
[0025] Figure 3 It is a structural schematic diagram of a carbon fiber pre-oxidation furnace in an embodiment of the utility model. DETAILED DESCRIPTION
[0026] 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 of the embodiments.
[0027] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.
[0029] like Figure 1 to Figure 2 The intermediate distributor device shown comprises a shell, wherein a circulating air distribution chamber 1 is provided inside the shell, wherein the circulating air distribution chamber 1 comprises an air inlet 11, an inclined air guide wall 12 and an air outlet side wall 13, wherein a starting end of the inclined air guide wall 12 is connected to one side of the air inlet 11 and extends in a direction away from the air inlet 11, and the other end of the inclined air guide wall 12 is inclined in a direction away from the air inlet 11, and one end of the air outlet side wall 13 is connected to the other side of the air inlet 11, and the other end extends in a direction away from the air inlet 11 and is connected to an end of the inclined air guide wall 12 away from the air inlet 11; it should be pointed out here that in the embodiments of the present utility model, the shell has various composition forms, such as being formed by sheet metal or welding. The circulating air distribution chamber 1 is formed by bending or stamping the steel plate, or by casting; the inclined air guide wall 12 is set so that the process airflow blown vertically from the air inlet 11 is gradually changed in direction by the inclined air guide wall 12 in its blowing direction, that is, in the width direction of the air inlet 11, the wind blown in from the air inlet 11 closest to the inclined air guide wall 12 is changed in direction, and as the remaining process airflow continues to blow forward, the inclined surface of the inclined air guide wall 12 changes the wind direction in turn toward the direction of the air outlet side wall 13. In the embodiment of the utility model, a plurality of air outlet holes 13a are distributed on the air outlet side wall 13, and the plurality of air outlet holes 13a are gradually arranged from away from the air inlet 11 to close to the air inlet 11. Of course, it should be pointed out here that in the embodiment of the utility model, the air outlet hole 13a can be round or square or any structural form that can pass the airflow.
[0030] In the above embodiment, the design of the inclined side wall in the circulating air distribution chamber 1 can achieve a certain uniform distribution effect on the circulating air entering the circulating air distribution chamber 1, and the air outlet holes 13a on the air outlet side wall 13 are arranged non-uniformly, so that the number of orifice plates gradually decreases from away from the air inlet 11, which can effectively reduce the flow velocity at the air outlet side wall 13 close to the air inlet 11 and increase the flow velocity on the air outlet side wall 13 away from the air inlet 11, thereby ensuring the uniformity of the air flow velocity at the outlet of the intermediate distributor device.
[0031] On the basis of the above embodiments, in some embodiments of the present utility model, the circulating air distribution chamber 1 is arranged in a right triangle, the inclined air guide wall 12 is on the hypotenuse, and the air inlet 11 and the air outlet side wall 13 are on the right angle side. In specific implementation, the width of the air inlet 11 is usually smaller than the length of the air outlet side wall 13. That is, the airflow blown in through the air inlet 11 changes direction after passing through the inclined air guide wall 12 and blows toward the air outlet side wall 13.
[0032] In the embodiment of the utility model, the general inventive concept is to adjust the air volume on the air outlet side wall 13 from the direction away from the air inlet 11 to the direction close to the air inlet 11, so that the uniformity of the air flow blown in from the air inlet 11 when it is blown out from the air outlet side wall 13 is improved. Since the air volume near the air inlet 11 is large, and the air volume far from the air inlet 11 is small, the air outlet holes 13a on the air outlet side wall 13 are arranged oppositely, so that the air volume is relatively large at the place with small air volume, and the air volume is relatively small at the place with large air volume, so that the air volume on the entire air outlet side wall 13 tends to be evenly arranged; it should be pointed out here that the multiple air outlet holes 13a pointed out in the utility model are arranged gradually less from the direction away from the air inlet 11 to the direction close to the air inlet 11. It does not only refer to the setting of reducing the number or spacing of the air outlet holes 13a, but also refers to the setting of reducing the diameter of the air outlet holes 13a. The following are some specific arrangements of the air outlet holes 13a that are convenient for processing and manufacturing. Of course, it should be pointed out here that those skilled in the art can also make improvements to the present application based on the inventive concept of the present invention, such as setting the air outlet side wall 13 to a flared shape, and gradually increasing the number of air outlet holes 13a, or setting the air outlet side wall 13 to first increase and then decrease, and the corresponding air outlet holes 13a to first gradually increase and then gradually decrease, etc., all of which aim to ensure the uniformity of the air outlet at the air outlet side wall 13, and thus ensure the uniformity of the wind field.
[0033] like Figure 2 As shown in , in some embodiments of the utility model, a plurality of air outlet holes 13a are evenly distributed in a plurality of regions on the air outlet side wall 13 in a direction toward the air inlet 11, and the air outlet holes 13a in each region are evenly arranged, and the spacing between the air outlet holes 13a in the region gradually increases in the direction toward the air inlet 11. That is, the entire air outlet side wall 13 is divided into a plurality of equally divided regions along the length direction, and the air outlet holes 13a in each region are evenly spaced. Figure 2 In the figure, the right side is the direction away from the air inlet 11, and the air volume there is small, so the spacing of the air outlet holes 13a in the area closest to the direction away from the air outlet is arranged to be smaller, so as to increase the air volume of the air outlet side wall 13. The leftmost side is close to the air inlet 11, and the spacing of the air outlet holes 13a in the area close to the air inlet 11, i.e., the leftmost area, is set to the maximum, which can reduce the air volume there. In this way, the spacing of the air outlet holes 13a in each area from right to left gradually increases, so that the air volume area of the entire air outlet side wall 13 is uniform, and finally the technical effect of uniform wind field is achieved. Of course, it should be pointed out here that the spacing of the air outlet holes 13a can be a horizontal spacing or a vertical spacing, and those skilled in the art can choose according to their needs.
[0034] In some embodiments of the utility model, a plurality of air outlet holes 13a are arranged in multiple columns on the air outlet side wall 13, and the distance between two adjacent columns gradually increases towards the direction close to the air inlet 11. This refers to the same row spacing and changed column spacing. In another embodiment of the utility model, a plurality of air outlet holes 13a are arranged in multiple columns on the air outlet side wall 13, the same spacing between each column, and the distance between two adjacent air outlet holes 13a in each column gradually increases towards the direction close to the air inlet 11. This refers to the same column spacing and changed row spacing. The purpose of the above settings is to facilitate processing and manufacturing.
[0035] The present invention also provides a carbon fiber preoxidation furnace in an embodiment, including a main chamber 2, a side furnace 3 and a fan 4, as shown in FIG. Figure 3 As shown in: the main chamber 2 has the above-mentioned intermediate distributor; the main chamber 2 here refers to the chamber through which the precursor passes during the pre-oxidation process of carbon fiber. One end of the side furnace 3 is connected to the side of the main chamber 2 away from the intermediate distributor, and the other end is connected to the air inlet 11 of the intermediate distributor; the fan 4 is arranged in the side furnace 3, and is used to blow the airflow sucked from the main chamber 2 into the intermediate distributor; wherein the air outlet side wall 13 of the intermediate distributor is arranged toward the main chamber 2. Through such an arrangement, the fan 4 blows the process airflow into the main chamber 2 through the intermediate distributor, and the process airflow flows into the side furnace 3 after passing through the main chamber 2, and then is blown into the intermediate distributor again under the action of the fan 4 in the side furnace 3, thereby forming a circulating airflow.
[0036] In some embodiments of the present invention, Figure 3 As shown in , the middle distributor is arranged vertically with the main chamber 2, and the length of the air outlet side wall 13 is arranged to match the width of the main chamber 2. In this way, the process airflow evenly blown out from the air outlet side wall 13 flows along the length direction of the main chamber 2, thereby improving the uniformity of the wind field in the main chamber 2; of course, it should be pointed out here that in the pre-oxidation furnace, there are many circulation modes of the process airflow, and the middle distributor in the embodiment of the utility model can be applied to a variety of circulation modes of the process airflow. Specifically, in some embodiments of the utility model, the main chamber 2 adopts an end-to-end hot air circulation structure, and the middle distributor is located at one end of the main chamber 2; in some other embodiments of the utility model, the main chamber 2 adopts a hot air circulation structure from the middle to both ends, the middle distributor is located in the middle of the main chamber 2, and two are provided, and the air outlet side walls 13 of the two middle distributors are discharged in opposite directions; in some other embodiments of the utility model, the main chamber 2 adopts a top-to-bottom hot air circulation structure, and the middle distributor is located at the top of the main chamber 2.
[0037] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. An intermediate distributor device, characterized in that: The invention comprises a shell, wherein the shell has a circulating air distribution chamber inside, wherein the circulating air distribution chamber has an air inlet, an inclined air guide wall and an air outlet side wall, wherein the starting end of the inclined air guide wall is connected to one side of the air inlet and extends in a direction away from the air inlet, the other end of the inclined air guide wall is inclined in a direction toward the other side of the air inlet, one end of the air outlet side wall is connected to the other side of the air inlet, the other end extends in a direction away from the air inlet and is connected to the end of the inclined air guide wall away from the air inlet; There are a plurality of air outlet holes distributed on the air outlet side wall, and the plurality of air outlet holes are arranged in a decreasing direction from away from the air inlet to close to the air inlet.
2. The intermediate distributor device according to claim 1, characterized in that The circulating air distribution chamber is arranged in a right-angled triangle, the inclined air guide wall is located on the hypotenuse, and the air inlet and the air outlet side wall are located on the right-angled side.
3. The intermediate distributor device according to claim 1, characterized in that The plurality of air outlet holes are evenly distributed in several areas on the air outlet side wall in a direction toward the air inlet. The air outlet holes in each area are evenly arranged, and the spacing between the air outlet holes in the area gradually increases in the direction toward the air inlet.
4. The intermediate distributor device according to claim 1, characterized in that The plurality of air outlet holes are arranged in a plurality of rows on the air outlet side wall, and the distance between two adjacent rows gradually increases toward the direction close to the air inlet.
5. The intermediate distributor device according to claim 1, characterized in that The plurality of air outlet holes are arranged in a plurality of rows on the air outlet side wall, the spacing between each row is the same, and the spacing between two adjacent air outlet holes in each row gradually increases in the direction close to the air inlet.
6. A carbon fiber preoxidation furnace, characterized in that: include: A main chamber having an intermediate distributor as claimed in any one of claims 1 to 5; A side furnace, one end of which is in communication with a side of the main chamber away from the middle distributor, and the other end of which is in communication with an air inlet of the middle distributor; a fan, arranged in the side furnace, for blowing the airflow sucked from the main chamber into the intermediate distributor; Wherein, the air outlet side wall of the intermediate distributor is arranged toward the main chamber.
7. The carbon fiber preoxidation furnace according to claim 6, characterized in that: The intermediate distributor is arranged perpendicularly to the main chamber, and the length of the air outlet side wall is arranged to match the width of the main chamber.
8. The carbon fiber preoxidation furnace according to claim 6, characterized in that: The main chamber adopts an end-to-end hot air circulation structure, and the intermediate distributor is located at one end of the main chamber.
9. The carbon fiber preoxidation furnace according to claim 6, characterized in that: The main chamber adopts a hot air circulation structure from the middle to both ends. The middle distributor is located in the middle of the main chamber, and two of them are provided, and the air outlet side walls of the two middle distributors discharge air in opposite directions.
10. The carbon fiber preoxidation furnace according to claim 6, characterized in that: The main chamber adopts a top-to-bottom hot air circulation structure, and the intermediate distributor is located at the top of the main chamber.