Discharging cooling structure of high-temperature furnace
By introducing an air-cooled structure into the high-temperature furnace discharge cooling mechanism, the problems of easy cracking of liquid-cooled structures and oxidation of graphite boats were solved, resulting in a longer service life and higher operational reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU HUIKE EQUIP CO LTD
- Filing Date
- 2026-03-17
- Publication Date
- 2026-04-14
AI Technical Summary
In existing high-temperature furnace discharge cooling mechanisms, liquid cooling structures are prone to weld cracking and leakage due to alternating thermal stress, and graphite boats are easily oxidized during discharge, affecting service life and product quality.
An air-cooled structure is added to the liquid-cooled structure. By using the shared wall of the air-cooled channel and the liquid-cooled channel and the airflow protection, the alternating thermal stress is reduced, a protective air curtain is formed, which blocks heat and oxygen and protects the liquid-cooled structure and the graphite boat.
It extends the service life of the liquid cooling structure, reduces the frequency of downtime maintenance, reduces parts replacement costs, and improves the service life of the discharge carrier and product quality.
Smart Images
Figure CN224121738U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high-temperature furnace cooling, and in particular to a high-temperature furnace discharge cooling mechanism. Background Technology
[0002] In high-temperature furnaces, graphite boats are typically used to carry products for high-temperature processing. When the graphite boat and the product it carries are discharged, they need to be cooled by a cooling mechanism. In the prior art, a liquid-cooled welding flange is installed at the discharge port of the high-temperature furnace. Heat exchange is carried out through the circulating coolant inside the liquid-cooled welding flange, thereby reducing the temperature.
[0003] However, liquid cooling structures are usually manufactured using welded structures. In actual operation, the liquid cooling structure directly faces the alternating action of high-temperature areas and rapid cooling of the coolant. Due to the thermal expansion and contraction of the metal materials, the flange body, weld metal, and the base material of the steel pipe or equipment shell have different degrees of freedom and rates of expansion and contraction due to differences in thickness, shape, and constraint. Uneven and constrained expansion and contraction within the structure, especially in the stress-concentrated weld area, generate alternating thermal stress with alternating directions and cyclical reciprocating. The weakest weld area is prone to microcracks initiating due to alternating thermal stress. After multiple hot and cold cycles, the cracks gradually expand, eventually causing through cracks and coolant leakage. The service life of traditional liquid cooling structures is only three to four months, requiring frequent shutdowns for replacement, which not only generates high maintenance costs but also poses production safety hazards.
[0004] Meanwhile, graphite boats are extremely sensitive to oxygen at high temperatures. If they are exposed to an oxygen-containing environment during the discharge process, they are prone to oxidation, which can lead to corrosion, shorten their service life, and affect the quality of the products they carry and production efficiency. Utility Model Content
[0005] The purpose of this invention is to provide a high-temperature furnace discharge cooling mechanism to solve the problems in the prior art where the liquid cooling structure is prone to weld cracking and leakage due to alternating thermal stress generated during discharge, and the graphite boat surface is easily oxidized at high temperatures during discharge.
[0006] The technical solution of this utility model is: a high-temperature furnace discharge cooling mechanism, comprising:
[0007] A liquid-cooled structure includes a liquid-cooling component and a liquid-inlet component that are fixedly connected to each other. The liquid-cooled structure has a liquid-cooling channel through which circulating coolant flows. The liquid-cooling channel includes a main liquid-cooling channel and a liquid-inlet channel that are connected by a liquid-cooling communication hole. The liquid-inlet channel is located inside the liquid-inlet component, and the main liquid-cooling channel is located inside the liquid-cooling component.
[0008] An air-cooled component is fixedly connected to a liquid-cooled structure. The air-cooled component and the liquid-cooled structure form an air-cooling channel. At least a portion of the air-cooling channel and the liquid-cooling channel share a wall surface. The shared wall surface at least partially covers the weld area between the liquid-cooled component and the liquid inlet component.
[0009] Gas is introduced into the air-cooled component, forming a protective air curtain on the inner side of the liquid-cooled structure near the discharge carrier.
[0010] Preferably, the air-cooling component is located on the side of the liquid inlet component away from the liquid-cooling component, the air-cooling component has an air inlet cavity, the liquid inlet component has an air-cooling cavity, and the air inlet cavity and the air-cooling cavity are interconnected through an air-cooling communication hole.
[0011] Preferably, at least part of the air-cooled cavity shares a wall with the liquid-cooled main channel.
[0012] Preferably, the liquid inlet component has several air outlets on its inner wall facing the discharge carrier, which communicate with the air-cooling chamber.
[0013] Preferably, the liquid cooling component, the liquid inlet component, and the air cooling component are all annular structures, the liquid cooling component, the liquid inlet component, and the air cooling component are coaxially arranged, and the inner diameter of the liquid cooling component is larger than the inner diameter of the liquid inlet component and the air cooling component.
[0014] Preferably, the air outlets are evenly distributed around the circumference of the inner diameter of the liquid inlet and face the center of the air-cooling device.
[0015] Preferably, there is a space between the inner wall of the high-temperature furnace discharge cooling mechanism and the discharge carrier.
[0016] Preferably, the gas blown out through the air outlet is dispersed on the outer peripheral wall of the discharge carrier to form at least two airflows, with part of the airflow blocking the heat of the heating section inside the high-temperature furnace and part of the airflow blocking the air from contacting the discharge carrier.
[0017] Preferably, the gas introduced into the air-cooling channel is an inert gas.
[0018] Preferably, both the liquid cooling main channel and the air cooling cavity are annular grooves and are arranged in parallel.
[0019] Compared with the prior art, the advantages of this utility model are:
[0020] By adding an air-cooling structure to the liquid-cooled structure, crack prevention is achieved through the shared wall of the air-cooling channel and the liquid-cooling channel, as well as the airflow to the weld area of the liquid-cooled structure, reducing the risk of scrapping the liquid-cooled structure. At the same time, a protective air curtain is formed for the discharge carrier, with part of the airflow blocking heat and part blocking oxygen, reducing the high-temperature oxidation of the discharge carrier, and improving the service life and operational reliability of the liquid-cooled structure and the discharge carrier. Attached Figure Description
[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0022] Figure 1 This is a schematic diagram of the high-temperature furnace discharge cooling mechanism described in this utility model;
[0023] Figure 2 This is an exploded view of the high-temperature furnace discharge cooling mechanism described in this utility model;
[0024] Figure 3 This is a cross-sectional view of the high-temperature furnace discharge cooling mechanism described in this utility model;
[0025] Figure 4 This is a schematic diagram of the liquid flow direction in the liquid cooling channel described in this utility model;
[0026] Figure 5 This is a schematic diagram of the gas flow direction in the air-cooled channel described in this utility model;
[0027] Figure 6 This is a schematic diagram showing the flow direction of substances in the liquid cooling channel and the air cooling channel of this utility model;
[0028] Figure 7 This is a schematic diagram of the high-temperature furnace discharge cooling mechanism of this utility model installed on the high-temperature furnace;
[0029] Figure 8 This is a schematic diagram showing the positions of the high-temperature furnace discharge cooling mechanism and the discharge carrier described in this utility model.
[0030] The components are as follows: 1. Liquid cooling structure; 11. Liquid cooling component; 101. Liquid cooling channel; 111. Liquid cooling main channel; 112. Liquid cooling connecting hole; 12. Liquid inlet component; 121. Liquid inlet and outlet channel; 2. Air cooling component; 3. Air cooling channel; 31. Air cooling cavity; 311. Air cooling connecting hole; 32. Air inlet cavity; 321. Air outlet; 4. Material discharge carrier. Detailed Implementation
[0031] The present invention will be further described in detail below with reference to specific embodiments:
[0032] like Figure 1 and Figure 2As shown, the high-temperature furnace discharge cooling mechanism includes a liquid cooling structure 1 and an air cooling component 2. The air cooling component 2 is located on the side of the liquid inlet 12 away from the liquid cooling component 11. The air cooling component 2 has at least one air inlet cavity 32, and the liquid inlet 12 has an air cooling cavity 31. The air inlet cavity 32 and the air cooling cavity 31 are interconnected through an air cooling connecting hole 311. At least part of the air cooling cavity 31 shares a wall with the main liquid cooling channel 111. The air cooling component 2 cools the weld area of the liquid cooling structure 1, reduces the amplitude of alternating thermal stress, thereby inhibiting the generation and propagation of thermal fatigue cracks, extending the service life of the liquid cooling structure 1, reducing the frequency of downtime maintenance, and thus reducing the replacement cost of parts.
[0033] like Figures 1-6 As shown, the liquid cooling structure 1 includes a liquid cooling component 11 and a liquid inlet component 12 fixedly connected to each other. The liquid cooling structure 1 has a liquid cooling channel 101, in which circulating coolant flows. The circulating coolant is a liquid with cooling function, such as water or oil. Preferably, the circulating coolant is water or a mixture of water and additives. The additives can be rust inhibitors, corrosion inhibitors, scale inhibitors, or antifreeze, etc. The liquid cooling channel 101 includes a main liquid cooling channel 111 and a liquid inlet / outlet channel 121 connected through a liquid cooling connecting hole 112. The liquid cooling connecting hole 112 is connected to an air cooling connecting hole. 311 The projections of the liquid inlet and outlet channels 121 on any plane parallel to the end face of the liquid inlet 12 do not overlap. The liquid inlet and outlet channels 121 are located on the periphery of the air-cooling channel 3 and are opened inside the liquid inlet 12. The main liquid cooling channel 111 is opened inside the liquid cooling component 11 and undertakes the main cooling function. The air-cooling component 2 is fixedly connected to the liquid cooling structure 1, and the air-cooling component 2 and the liquid cooling structure 1 form an air-cooling channel 3. At least a portion of the air-cooling channel 3 and the liquid cooling channel 101 share a wall surface, and the shared wall surface at least partially covers the liquid cooling component 11 and the liquid inlet 12. The weld area; gas is introduced into the air-cooling channel 3 and forms a protective air curtain on the inner side of the liquid-cooling structure 1 near the discharge carrier 4. The gas introduced into the air-cooling channel 3 is an inert gas such as nitrogen or argon. The inert gas forms a protective atmosphere around the discharge carrier 4, thereby reducing oxidation damage to the discharge carrier 4. The liquid inlet 12 has several air outlets 321 on the inner wall of the discharge carrier 4 that communicate with the air-cooling chamber 31. There is a space between the inner wall of the high-temperature furnace discharge cooling mechanism and the discharge carrier 4. The gas blown out through the air outlets 321 is distributed around the discharge carrier 4. The wall disperses to form at least two airflows. Part of the airflow blocks the heat from the heating section inside the high-temperature furnace, and part of the airflow blocks the air from contacting the discharge carrier 4. The airflow diffusing towards the heating section of the high-temperature furnace forms a thermal barrier, preventing the high-temperature heat radiation from the heating section from being directly transferred to the liquid cooling structure 1. The airflow diffusing away from the heating section of the high-temperature furnace further blocks the air from contacting the discharge carrier 4, reducing the oxidation rate on the surface of the discharge carrier 4 and extending the service life of the processing carrier. Thus, by increasing air cooling, the liquid cooling structure 1 is cooled down and the discharge carrier 4 is isolated from oxygen, achieving dual protection.
[0034] Example
[0035] like Figures 4-8 As shown, the high-temperature furnace discharge cooling mechanism is located at the discharge port of the high-temperature furnace and is used to cool and protect the liquid-cooled structure 1 and the discharge carrier 4. The circulating coolant is water, and the gas introduced into the air-cooled channel 3 is nitrogen. The liquid-cooled component 11, the liquid inlet component 12, and the air-cooled component 2 are all annular structures. In other embodiments, the liquid-cooled component 11, the liquid inlet component 12, and the air-cooled component 2 can be set as square, rhomboid, or other annular surrounding shapes. The liquid-cooled component 11, the liquid inlet component 12, and the air-cooled component 2 are made of 316L stainless steel, which has good welding performance and corrosion resistance. The air-cooled component 2 and the liquid-cooled component 11 are respectively located on both sides of the liquid inlet component 12. The edges where the cooling component 2 contacts the liquid inlet component 12 and the liquid cooling component 12 are welded together as a whole by full welding around the perimeter. The liquid cooling component 11, the liquid inlet component 12 and the air cooling component 2 are coaxially arranged, and the inner diameter of the liquid cooling component 11 is larger than the inner diameters of the liquid inlet component 12 and the air cooling component 2. The liquid cooling component 11 has a liquid cooling main channel 111 inside. The liquid inlet and outlet of the liquid inlet and outlet channel 121 are opened on the outer peripheral wall of the liquid inlet component 12. The liquid inlet component 12 has a liquid inlet and outlet channel 121 communicating with the liquid cooling main channel 111 and an air cooling cavity 31 inside. The liquid inlet and outlet channel 121 is located in the air cooling cavity. On the periphery of cavity 31, two corresponding liquid cooling connection holes 112 are formed on the opposite end faces of liquid cooling component 11 and liquid inlet component 12. The main liquid cooling channel 111 and the liquid inlet / outlet channel 121 are connected through the liquid cooling connection holes 112 to form a liquid cooling channel 101. Air cooling component 2 has an air inlet cavity 32, which is parallel to the liquid inlet / outlet channel 121. The opposite end faces of liquid inlet component 12 and liquid inlet component 12 are each provided with a corresponding air cooling connection hole 311. The air inlet cavity 32 and air cooling cavity 31 are connected through the air cooling connection hole 311 to form an air cooling channel 3. Both the liquid cooling connection hole 112 and the air cooling connection hole 311 are... The liquid cooling main channel 111 and the air cooling chamber 31 are both annular grooves and are arranged in parallel. The air outlets 321 are evenly distributed along the circumference of the inner diameter of the liquid inlet 12 and face the center of the air cooling device. The air outlets 321 are circular through holes, and there are 8 air outlets 321. The appropriate diameter of the air outlets 321 can limit the airflow speed and flow rate. The discharge carrier 4 is a graphite boat. The product carried by the discharge carrier 4 needs to be cooled by the cooling structure when it is discharged. There is a space of 20-30mm between the inner wall of the high temperature furnace discharge cooling mechanism and the discharge carrier 4 to ensure that a stable protective air curtain can be formed.
[0036] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.
Claims
1. A high-temperature furnace discharge cooling structure characterized by comprising: The application relates to a high-temperature furnace discharge cooling structure. The liquid cooling structure (1) is fixedly connected with the air cooling member (2), and the air cooling member (2) and the liquid cooling structure (1) form an air cooling channel (3); at least part of the air cooling channel (3) shares a wall surface with the liquid cooling channel (101); and the shared wall surface at least partially covers the welding seam area of the liquid cooling member (11) and the liquid inlet member (12). The air cooling channel (3) is filled with gas and forms a protective gas curtain on the inner side of the liquid cooling structure (1) close to the discharge carrier (4). The air cooling member (2) is arranged on the side of the liquid inlet member (12) away from the liquid cooling member (11), and the air cooling member (2) is provided with at least one air inlet cavity (32); the liquid inlet member (12) is provided with an air cooling cavity (31); and the air inlet cavity (32) and the air cooling cavity (31) are connected with each other through an air cooling communication hole (311).
2. The high-temperature furnace discharge cooling structure according to claim 1, characterized by: At least part of the air cooling cavity (31) shares a wall surface with the liquid cooling main channel (111).
3. The high-temperature furnace discharge cooling structure according to claim 2, characterized by: The liquid inlet member (12) is provided with a plurality of gas outlets (321) connected with the air cooling cavity (31) on the inner side wall facing the discharge carrier (4).
4. The high-temperature furnace discharge cooling structure according to claim 2, characterized by: The liquid cooling member (11), the liquid inlet member (12) and the air cooling member (2) are all annular structures, and the liquid cooling member (11), the liquid inlet member (12) and the air cooling member (2) are coaxially arranged, and the inner diameter of the liquid cooling member (11) is larger than the inner diameters of the liquid inlet member (12) and the air cooling member (2).
5. The high-temperature furnace discharge cooling structure according to claim 4, characterized by: The gas outlets (321) are uniformly distributed along the circumference of the inner diameter of the liquid inlet member (12) and are arranged towards the central position of the air cooling device.
6. The high-temperature furnace discharge cooling structure according to claim 5, characterized by: The high-temperature furnace discharge cooling structure has a space between the inner wall of the high-temperature furnace discharge cooling structure and the discharge carrier (4).
7. The high-temperature furnace discharge cooling structure according to claim 1, characterized by: The gas blown out through the gas outlets (321) is dispersed to form at least two air flows on the outer peripheral wall of the discharge carrier (4), part of the air flows block the heat of the heating section in the high-temperature furnace, and part of the air flows block the air from contacting the discharge carrier (4).
8. The high temperature furnace discharge cooling structure according to claim 6, characterized by: The gas filled in the air cooling channel (3) is inert gas.
9. The high temperature furnace discharge cooling structure according to claim 1, characterized by: The liquid cooling main channel (111) and the air cooling cavity (31) are both annular grooves and are arranged in parallel.
10. The high temperature furnace discharge cooling structure according to claim 1, characterized by: