Double-surface hot air vertical opposite jet flow hot air circulation vertical continuous heat treatment furnace for strip

Abstract

The utility model relates to the technical field of metal heat treatment equipment, in particular to a strip double-surface hot air vertical opposite jet flow hot air circulation vertical continuous heat treatment furnace, and aims at solving the problem that a traditional heat treatment furnace is prone to generating temperature gradient in the heating process, so that strips are heated unevenly. According to the technical scheme, flow guide protection parts are arranged in a furnace shell, each flow guide protection part comprises a flow guide protection outer container and a jet flow interlayer plate, a channel allowing strips to pass through is formed, one end of each flow guide protection part is connected with a draught fan, continuous closed-loop circulating jet flow hot air circulation is formed, an air outlet of the draught fan circulates downwards or upwards, and each flow guide protection part independently controls the temperature. The strip heat treatment device achieves the technical effects that the heating uniformity of the strip during heat treatment is improved, and therefore the product quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of metal heat treatment equipment, and in particular to a vertical continuous heat treatment furnace with hot air circulation and vertically opposite hot air jets on both surfaces of a strip. Background Art

[0002] Currently, heat treatment technology for metal strips plays a vital role in the industrial sector. Proper heat treatment of metal strips can improve their mechanical properties and surface quality. However, while traditional heat treatment methods, such as horizontal or single-sided heating techniques, are widely used in various heat treatment applications, they are increasingly unable to meet the high-quality and efficient production requirements of modern industry due to issues such as uneven heating, high energy consumption, and low production efficiency. In recent years, evolving market demands and technological advancements have placed higher demands on the quality and efficiency of metal strip heat treatment, prompting the industry to seek more advanced and efficient heat treatment equipment and technologies.

[0003] In the prior art, in order to address the quality and efficiency issues of heat treatment of metal strips, the industry generally adopts vertical or horizontal heat treatment furnaces for heating, among which horizontal furnaces are widely used due to their simple structure and easy operation. However, for the pursuit of higher quality heat treatment processes, simple horizontal or single-sided heating has shown its shortcomings. In comparison, although vertical heat treatment furnaces can improve the heat treatment effect to a certain extent, there is still much room for improvement in heating uniformity and energy conservation. In addition, whether it adopts a vertical or horizontal design, traditional heat treatment equipment generally has the problem of uneven temperature distribution, especially in long-term or large-scale production processes, this problem is particularly prominent, affecting the quality of the final product. Utility Model Content

[0004] In order to improve the uniformity of heating of a strip during heat treatment, the present application provides a vertical continuous heat treatment furnace with hot air circulation and vertically opposite hot air jets on both surfaces of the strip.

[0005] The present application provides a vertical continuous heat treatment furnace for strips with hot air circulation and vertical hot air jets on both surfaces, which adopts the following technical solutions:

[0006] A vertical continuous heat treatment furnace with hot air circulation and vertically opposite hot air jets on both surfaces of a strip, comprising a furnace shell, inlets and outlets for the strip to pass through being provided at both ends of the furnace shell in the length direction, a flow guide protection piece being provided inside the furnace shell, a flow guide protection piece being provided on each side of the inlet and outlet, a channel for the strip to pass through being formed between the two flow guide protection pieces, the length direction of the flow guide protection piece being consistent with the length direction of the furnace shell; a fan being connected to one end of the flow guide protection piece.

[0007] By adopting the above technical solution, the strip passes through the two guide protection parts, and the airflow of the fan blows towards the strip after passing through the guide protection parts, realizing continuous circulation vertical jet heating on the two surfaces of the strip, realizing continuous circulation vertical jet heating on the two surfaces of the strip, significantly improving the heat conduction efficiency and temperature uniformity.

[0008] Optionally, the flow-guiding protection component includes a flow-guiding protection outer liner and a jet barrier plate. The two flow-guiding protection outer liner are respectively arranged on both sides of the inlet and outlet and installed on the inner wall of the furnace shell. The sides of the two flow-guiding protection outer liner close to each other are respectively connected to the jet barrier plates. The flow-guiding protection outer liner and the jet barrier plates form a jet chamber. The strip passes between the two jet barrier plates. The fan is installed on the flow-guiding protection outer liner, and the air outlet of the fan is connected to the jet chamber. The airflow of the fan passes through the jet chamber and is blown out from the air outlet of the jet barrier plate.

[0009] By adopting the above technical solution, the strip passes through the two jet interlayer plates, and the air flow from the fan passes through the jet chamber and is blown out from the jet outlet of the jet interlayer plate, implementing continuous circulation vertical jet heating on the two surfaces of the strip passing continuously, thereby improving the uniformity of heating of the strip and the product quality.

[0010] Optionally, the air outlet is a circular hole, a long waist hole or a slit structure.

[0011] By adopting the above technical solution, different structures of air nozzles are selected according to different process temperature requirements, and the hot air jet effect is optimized, thereby improving the uniformity of strip heating.

[0012] Optionally, the air nozzle is a slit-type structure, and multiple air nozzles are arranged in sequence along the length direction of the jet isolation plate. Multiple slit plates are arranged in each air nozzle, and multiple slit plates are arranged in sequence in the air nozzle to form an air nozzle with a slit-type structure.

[0013] By adopting the above technical solution, the air nozzle adopts a slit structure and is arranged in sequence along the length direction of the jet interlayer plate, which can distribute the hot air more evenly, further improve the uniformity of heating of the strip, and thus improve product quality.

[0014] Optionally, wind gathering plates are provided on both sides of the air outlet in the vertical direction, and the wind gathering plates are installed on the jet barrier plate. The two wind gathering plates at the same air outlet approach each other in the direction approaching the strip.

[0015] By adopting the above technical solution, the wind gathering plate arranged on the jet interlayer plate can effectively gather the hot air, so that the hot air is blown toward the strip more concentratedly, thereby achieving rapid heating of the strip.

[0016] Optionally, the air suction port of the fan is located between two jet interlayer plates, and the air outlet of the fan is located in the jet chamber to form a continuous closed-loop jet hot air circulation.

[0017] By adopting the above technical solution, the fan delivers air flow to the air jet chamber, and the hot air is blown vertically to the passing strip through the air jet outlet on the jet interlayer plate, and finally moves along the strip to the air suction port of the fan, forming a continuous closed-loop jet hot air circulation, which improves the uniformity of heating of the strip and thus improves product quality.

[0018] Optionally, the fan is installed at the top or bottom of the length of the guide protection member to form a circulation mode with the fan outlet facing downward or upward.

[0019] By adopting the above technical solution, the fan is installed at the top or bottom of the guide protection member in the length direction, forming a downward or upward circulation mode with the fan outlet, thereby achieving uniform distribution of hot air in the furnace and improving the uniformity of strip heating.

[0020] Optionally, the fan is a cross-flow fan.

[0021] By adopting this technical solution, the crossflow fan's diameter can be kept within a relatively small range, thereby reducing the furnace width and improving the overall compactness of the heat treatment furnace. The crossflow fan, combined with the flow guide protection, ensures uniform heating on both sides of the strip, improving the quality and efficiency of the heat treatment.

[0022] Optionally, each of the flow guide protection components is independently temperature controlled.

[0023] By adopting the above technical solution, each flow guide protection part is independently temperature-controlled, achieving precise control of double-sided heating of the strip, further improving the uniformity of strip heating and improving product quality.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. The strip passes between two guide guards, and the airflow from the fan blows towards the strip after passing through the guide guards, realizing continuous circulation vertical jet heating on both surfaces of the strip, significantly improving heat conduction efficiency and temperature uniformity;

[0026] 2. The fan delivers air to the air jet chamber. The hot air passes through the air jets on the jet interlayer plate and blows vertically toward the passing strip. Finally, it moves along the strip toward the air suction port of the fan, forming a continuous closed-loop hot air jet circulation, which improves the uniformity of strip heating and thus improves product quality.

[0027] 3. The use of cross-flow fans allows the fan diameter to be controlled within a smaller range, thereby reducing the furnace width and improving the overall compactness of the heat treatment furnace. The cross-flow fans, combined with the flow guide protection, ensure uniform heating on both sides of the strip, improving the quality and efficiency of the heat treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a vertical continuous heat treatment furnace in which hot air is sprayed vertically toward each other on both surfaces of a strip in an embodiment of the present application.

[0029] Figure 2 It is a cross-sectional view used to reflect the internal structure of the furnace shell in the embodiment of the present application.

[0030] Figure 3 It is a cross-sectional view used to illustrate the specific structure of the flow guide protection component in the embodiment of the present application.

[0031] Explanation of the accompanying reference numerals: 1. furnace shell; 11. inlet and outlet; 2. guide protection member; 21. guide protection outer liner; 22. jet barrier plate; 221. air outlet; 222. slit plate; 223. air gathering plate; 3. fan; 4. air jet chamber; 5. strip. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 This application is described in further detail.

[0033] The embodiment of the present application discloses a vertical continuous heat treatment furnace with hot air circulation and vertical hot air jets on both surfaces of a strip. Figure 1 and Figure 2 The embodiment of the present application provides a vertical continuous heat treatment furnace with hot air circulation and vertically opposite hot air jets on both surfaces of a strip, comprising a furnace shell 1, two flow guide protection members 2 and a fan 3. In this embodiment, the length direction of the furnace shell 1 is vertical to form a vertical furnace; an inlet and outlet 11 is provided at both ends of the length direction of the furnace shell 1 for the strip 5 to pass through, and two flow guide protection members 2 are respectively installed on both sides of the inlet and outlet 11, and each flow guide protection member 2 is connected to a fan 3. When in use, the strip 5 enters the interior of the furnace shell 1 from the inlet and outlet 11 on one side of the furnace shell 1 and passes between the two flow guide protection members 2. At this time, the fan 3 transports airflow to the flow guide protection members 2, and finally blows air toward the strip 5 through the flow guide protection members 2, realizing continuous circulation vertical jet heating on both surfaces of the strip 5, and realizing continuous circulation vertical jet heating on both surfaces of the strip 5, significantly improving heat conduction efficiency and temperature uniformity.

[0034] Reference Figure 2 and Figure 3The flow guide protection part 2 is specifically a flow guide muffle, which includes a flow guide protection outer shell 21 and a jet barrier plate 22. The two flow guide protection outer shells 21 are respectively installed on both sides of the inlet and outlet 11 of the furnace shell 1 by bolts, and the flow guide protection outer shells 21 wrap the insulation furnace lining. At this time, the two flow guide protection outer shells 21 are set with an opening on one side close to each other.

[0035] Specifically, the flow-guiding protective outer liner 21 utilizes a corrugated plate structure, which enhances its rigidity and provides improved insulation, reducing heat loss. The outer liner can be made of heat-resistant steel, and its thickness can be adjusted within a range of 1-2 mm based on actual heating requirements to ensure excellent heat resistance and mechanical strength. Furthermore, the peaks and troughs of the corrugated plate can be designed to enhance the insulation effect based on actual heating requirements.

[0036] Reference Figure 2 and Figure 3 The jet barrier plate 22 is installed on one side of the opening of the guide protection outer liner 21. The guide protection outer liner 21 and the jet barrier plate 22 located on the same side of the inlet and outlet 11 form a jet chamber 4. The heater is installed in the jet chamber 4 by horizontal insertion. The heater can be an electric heater or a natural gas burner; a channel for the strip 5 to pass through is formed between the two jet barrier plates 22.

[0037] Reference Figure 2 and Figure 3 The jet barrier plate 22 comprises two parallel structural plates, which can be made of a heat-resistant alloy with excellent high-temperature resistance. The design specifications of the jet barrier plate 22 are adjusted according to the material of the strip 5 and the desired heat treatment effect. For example, the size and shape of the air nozzle 221 can be adjusted according to the specific process conditions. The air nozzle 221 can be a circular hole, a long waist hole, or a slit structure. The circular hole design is used to enhance the localized blowing effect of the hot air, while the long waist hole design ensures an overall uniform airflow distribution, allowing the hot air to blow evenly across the surface of the strip 5. The design flexibility of the air nozzle 221 provides a way to adapt to different strip 5 materials and sizes, thereby optimizing the overall heat treatment process.

[0038] In this embodiment, the air nozzle 221 is a slit-type structure, and multiple air nozzles 221 are arranged in sequence along the length direction of the jet isolation plate 22. Multiple slit plates 222 are arranged in each air nozzle 221, and multiple slit plates 222 are arranged in sequence in the air nozzle 221 to form an air nozzle 221 with a slit-type structure.

[0039] Air concentrators 223 are provided on either side of the air outlet 221 in the vertical direction. These concentrators 223 are integrally formed on the jet barrier plate 22. The two concentrators 223 at the same air outlet 221 are positioned toward each other as they approach the strip 5. The concentrators 223 on the jet barrier plate 22, mounted on both sides of the jet barrier plate 22, enhance the jet flow and distribute the hot air more evenly from the air outlet 221 toward the strip 5. The shape of the concentrators 223 can be customized to meet the jet flow requirements, such as using an arc or rectangle to better control the direction and speed of the airflow.

[0040] Reference Figure 2 and Figure 3 , one end of the flow guide protection member 2 is connected to a fan 3. In the present embodiment, the fan 3 is a cross-flow fan. Specifically, the cross-flow fan includes a motor and a blade system. The motor adopts a high-efficiency and energy-saving DC motor or AC motor to ensure long-term stable operation. The design of the blades takes into account the principles of airflow dynamics, and the airflow distribution is optimized by adjusting the angle and shape of the blades. The installation method of the fan 3 can be selected to be installed on the top or bottom of the flow guide protection outer tank 21 according to the specific furnace body structure. During installation, it should be ensured that the axis of the fan 3 is consistent with the center line of the spray chamber 4, so that the airflow enters evenly and is blown evenly toward the strip 5. The air intake of the fan 3 is located between the two jet interlayer plates 22, and the air outlet of the fan 3 is located in the spray chamber 4 to form a continuous closed-loop circulation jet hot air cycle.

[0041] Each flow guide protection member 2 is independently temperature-controlled, and each of the two air injection chambers 4 is provided with an independent temperature-controlled zone, thereby realizing a set of cross-flow fans and a set of heating systems.

[0042] The implementation principle of a vertical continuous heat treatment furnace with hot air circulation and vertically opposite hot air jets on both surfaces of a strip in an embodiment of the present application is as follows: when in use, the strip 5 enters the interior of the furnace shell 1 from the inlet and outlet 11 on one side of the furnace shell 1, and passes between the two jet partition plates 22. At this time, the fan 3 delivers air flow to the jet chamber 4, and the hot air passes through the jet port 221 on the jet partition plate 22 and blows vertically toward the passing strip 5, and finally moves along the strip 5 toward the air suction port of the fan 3, forming a continuous closed-loop circulation jet hot air circulation, realizing continuous circulation vertical jet heating of the two surfaces of the strip 5, and significantly improving the heat conduction efficiency and temperature uniformity.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A vertical continuous heat treatment furnace with hot air circulation and vertical hot air jets on both surfaces of a strip, comprising a furnace shell (1), wherein both ends of the furnace shell (1) in the longitudinal direction are provided with inlets and outlets (11) for the strip (5) to pass through, characterized in that: A flow guide protection member (2) is provided in the furnace shell (1), and a flow guide protection member (2) is provided on each side of the inlet and outlet (11). A channel for the strip (5) to pass through is formed between the two flow guide protection members (2), and the length direction of the flow guide protection member (2) is consistent with the length direction of the furnace shell (1); one end of the flow guide protection member (2) is connected to a fan (3).

2. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 1, characterized in that: The flow guide protection member (2) comprises a flow guide protection outer liner (21) and a jet barrier plate (22). The two flow guide protection outer liner (21) are respectively arranged on both sides of the inlet and outlet (11) and installed on the inner wall of the furnace shell (1). The two sides of the flow guide protection outer liner (21) close to each other are respectively connected to the jet barrier plate (22). The flow guide protection outer liner (21) and the jet barrier plate (22) form a jet chamber (4). The strip (5) passes between the two jet barrier plates (22). The fan (3) is installed on the flow guide protection outer liner (21), and the air outlet of the fan (3) is connected to the jet chamber (4). The airflow of the fan (3) passes through the jet chamber (4) and is blown out from the air outlet (221) of the jet barrier plate (22).

3. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 2, characterized in that: The air jet (221) is a circular hole, a long waist hole or a slit structure.

4. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 3, characterized in that: The air jet (221) is a slit-type structure, and a plurality of the air jets (221) are sequentially arranged along the length direction of the jet barrier plate (22), and a plurality of slit plates (222) are arranged in each of the air jets (221), and the plurality of slit plates (222) are sequentially arranged in the air jet (221) to form an air jet (221) with a slit-type structure.

5. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 4, characterized in that: Wind gathering plates (223) are provided on both sides of the air outlet (221) in the vertical direction. The air gathering plates (223) are installed on the jet barrier plate (22). The two air gathering plates (223) at the same air outlet (221) are close to each other in the direction close to the strip (5).

6. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 2, characterized in that: The air intake of the fan (3) is located between two jet interlayer plates (22), and the air outlet of the fan (3) is located in the jet chamber (4), so as to form a continuous closed-loop jet hot air circulation.

7. The vertical continuous heat treatment furnace for strips with hot air circulation and vertical hot air jets on both surfaces according to claim 1, characterized in that: The fan (3) is installed at the top or bottom of the length of the guide protection member (2) to form a circulation mode in which the air outlet of the fan (3) is directed downward or upward.

8. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 7, characterized in that: The fan (3) is a cross-flow fan.

9. The vertical continuous heat treatment furnace for strip materials with hot air circulation and vertical hot air jets on both surfaces according to claim 1, characterized in that: Each of the flow guide protection components (2) is independently temperature controlled.

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