CN216473332U

CN216473332U - Circulating air annealing furnace

Info

Publication number: CN216473332U
Application number: CN202121895479.1U
Authority: CN
Inventors: 毛志强; 李世轩; 朱咸中
Original assignee: Suzhou Longray Thermal Technology Co Ltd
Current assignee: Suzhou Longray Thermal Technology Co Ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-05-10
Anticipated expiration: 2031-08-13

Abstract

A circulating air annealing furnace comprising: the furnace body is internally provided with a hearth; the fluid director is positioned in the hearth and comprises a horizontal section and vertical sections connected with the two ends of the horizontal section, one end of each vertical section, which is far away from the horizontal section, is connected with the furnace body, a working area is enclosed between the fluid director and the inner wall of the hearth, and the vertical sections are provided with outlets communicated with the working area; the circulating fan is arranged on the furnace body and comprises an air outlet and an air inlet, wherein the air outlet is positioned in the fluid director; the heating device is positioned in the fluid director; the air flow distributor is connected with the circulating fan and comprises an air inlet cylinder extending into the working area, and a plurality of air nozzles communicated with the air inlet are arranged on the air inlet cylinder. The air director can intensively and orderly deliver hot air to the working area, so that the circulating air speed and the heating speed are greatly improved; because the circulating fan is provided with the airflow distributor which is provided with a plurality of air nozzles communicated with the air inlet, the centralized backflow of the airflow is avoided, and the uniform heating of the material is ensured.

Description

Circulating air annealing furnace

Technical Field

The utility model relates to the technical field of heat treatment equipment, in particular to a circulating air annealing furnace.

Background

The annealing furnace is a heat treatment device for heating metal parts to a certain temperature for annealing, and is frequently applied when processing the metal parts such as aluminum foils, aluminum coils and the like. With the continuous development of science and technology, the requirement on the annealing quality of metal parts is higher and higher, and the temperature uniformity of an annealing furnace is an important factor influencing the annealing quality. The temperature of each part in the furnace body is often very uneven in the working state of the existing annealing furnace, and the reason is that the production efficiency and the production quality are low because the convection treatment is not carried out by adopting an effective means in the structure of the annealing furnace.

Accordingly, there is a need for improvements in the art that overcome the deficiencies in the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a circulating air annealing furnace, which is convenient for materials to be heated quickly and uniformly.

The purpose of the utility model is realized by the following technical scheme: a circulating air annealing furnace comprising: the furnace body is internally provided with a hearth; the fluid director is positioned in the hearth and comprises a horizontal section and vertical sections connected to two ends of the horizontal section, one end of each vertical section, which is far away from the horizontal section, is connected with the furnace body, a working area is enclosed between the fluid director and the inner wall of the hearth, and the vertical section is provided with an outlet communicated with the working area; the circulating fan is arranged on the furnace body and comprises an air outlet and an air inlet, wherein the air outlet is positioned in the fluid director; the heating device is positioned in the fluid director; and the airflow distributor is connected with the circulating fan and comprises an air inlet cylinder extending into the working area, and a plurality of air nozzles communicated with the air inlet are arranged on the air inlet cylinder.

Further, the air inlet cylinder gradually increases in diameter from one end close to the circulating fan to the other end, and the air nozzle is located at a position where the air inlet cylinder is close to the outer edge.

Further, the air inlet cylinder is located in the middle of the top of the working area.

Furthermore, the air outlets of the circulating fan are multiple and face the two end portions of the horizontal section respectively, and the heating devices are multiple and correspond to the air outlets respectively.

Furthermore, a bearing device for bearing the materials to be thermally treated is arranged in the working area, and the outlet of the vertical section is positioned below the bearing device.

Furthermore, the bearing device comprises a plurality of bearing upright columns fixed on the bottom wall of the hearth and a cross beam horizontally fixed on the bearing upright columns, and a material tray for accommodating materials to be heated is arranged on the cross beam.

Furthermore, the number of the bearing devices is multiple, and the circulating fan and the heating device are arranged at each bearing device.

Furthermore, the horizontal section is formed by matching two horizontal guide plates which are horizontally arranged relative to the furnace body, or the horizontal section is formed by matching the horizontal guide plates and the top wall of the hearth.

Furthermore, the vertical section is formed by enclosing two vertical guide plates which are vertically arranged relative to the furnace body, or the vertical section is formed by matching the vertical guide plates with the side wall of the hearth.

Further, the air outlet of the circulating fan is positioned in the horizontal section, and the flow guider further comprises a transition section which is obliquely connected between the horizontal section and the vertical section so as to form a chamfer angle between the horizontal section and the vertical section.

Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the fluid director connected with the air outlet of the circulating fan is arranged, so that the fluid director can intensively and orderly send the air flow heated by the heating device to the working area, and the air flow is absorbed and circulated by the air inlet, thus greatly improving the circulating air speed and increasing the temperature rise speed; and because the circulating fan is provided with the airflow distributor, the airflow distributor is dispersedly provided with a plurality of air nozzles communicated with the air inlet, thereby avoiding the centralized backflow of the airflow and ensuring the uniform heating of the materials.

Drawings

FIG. 1 is a schematic side view of a circulating air lehr of the present invention.

FIG. 2 is a schematic front view of the circulating air lehr of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and 2, a circulating air annealing furnace according to a preferred embodiment of the present invention includes: a furnace body 100 having a furnace chamber 11 therein; the fluid director 200 is positioned in the hearth 11 and comprises a horizontal section 21 and vertical sections 22 connected with two ends of the horizontal section 21, one end of the vertical section 22 far away from the horizontal section 21 is connected with the furnace body 100, a working area 300 is enclosed between the fluid director 200 and the inner wall of the hearth 11, and the vertical section 22 is provided with an outlet communicated with the working area 300; the circulating fan 400 is arranged on the furnace body 100 and comprises an air outlet 41 and an air inlet 42 for backflow, wherein the air outlet 41 is positioned in the flow guider 200; a heating device 600 positioned within the fluid director 200; the airflow distributor 800, connected to the circulating fan 400, includes an air inlet cylinder 81 extending into the working area 300, and the air inlet cylinder 81 is provided with a plurality of air nozzles communicated with the air inlets 42.

According to the utility model, the fluid director 200 connected with the air outlet 41 of the circulating fan 400 is arranged, so that the fluid director 200 can intensively and orderly send the air flow heated by the heating device 600 to the working area 300, and the air flow is absorbed and circulated by the air inlet 42, thus greatly improving the circulating air speed and increasing the temperature rise speed; and because the air flow distributor 800 is arranged on the circulating fan 400, a plurality of air nozzles communicated with the air inlet 42 are dispersedly arranged on the air flow distributor 800, thereby avoiding the concentrated backflow of air flow and ensuring that the material is uniformly heated.

Further, the fluid director 200 is made of a high temperature resistant material. In this embodiment, the horizontal section 21 may be formed by two horizontal baffles 211 horizontally arranged relative to the furnace body 100, or the horizontal section 21 may be formed by the horizontal baffles 211 and the top wall of the furnace 11 to guide the airflow. The end of the vertical section 22 remote from the horizontal section 21 meets the bottom wall of the furnace 11 for support. The outlet of the vertical section 22 is located close to the bottom wall of the furnace 11. The vertical section 22 can be enclosed by two vertical baffles 221 vertically arranged with respect to the furnace body 100, or the vertical section 22 can be formed by the vertical baffles 221 and the side wall of the furnace 11 to guide the airflow.

Further, the circulating fan 400 is fixed on the top wall of the hearth 11, and the air outlet 41 of the circulating fan 400 is positioned in the horizontal section 21. Preferably, the air outlets 41 are provided in a plurality and respectively face to two ends of the horizontal section 21, so that the air flow flowing out from the circulating fan 400 can flow to the two vertical sections 22 along the two ends of the horizontal section 21. Preferably, in order to make the air flow smoothly, a transition section 23 is provided between the horizontal section 21 and the vertical section 22, and the transition section 23 is obliquely received between the horizontal section 21 and the vertical section 22 to form a chamfer, so as to better guide the air flow flowing out from the horizontal section 21 into the vertical section 22.

Further, the heating device 600 is fixed on the top wall of the furnace 11, and its heating end extends into the horizontal section 21. The number of the heating devices 600 is plural, and the heating devices correspond to the air outlet 41 of the flow guider 200, and the air flow flowing from the air outlet 41 of the circulating fan 400 to the horizontal section 21 can be heated by the heating devices 600 and then sent into the vertical section 22. In the present embodiment, the heating device 600 is embodied as an electric heater.

Further, the air inlet cylinder 81 is located at the top middle position of the working area 300, and a plurality of air nozzles (not shown) communicated with the air inlet 42 can prevent the air flow from being concentrated at one point in the shape of Λ to flow back to the circulating fan 400. Preferably, the diameter of the air inlet cylinder 81 gradually increases from one end close to the circulating fan 400 to the other end, so that the air inlet cylinder 81 expands outwards of the working area 300 along the horizontal direction, and the air nozzles are dispersedly arranged at the positions of the air inlet cylinder 81 close to the outer edge, so as to further ensure that the top corners of the working area 300 can be sufficiently heated, and the heating uniformity of the working area 300 is improved.

Further, the annealing furnace further comprises a carrying device 500, the carrying device 500 comprises a plurality of carrying columns 51 fixed on the bottom wall of the hearth 11 and two beams 52 horizontally fixed on the carrying columns 51, the beams 52 are used for carrying the material trays 53 filled with the materials, and the two beams are respectively positioned on two sides of the material trays 53. By arranging the carrying device 500, a certain distance is formed between the tray 53 and the bottom wall of the hearth 11, and the tray 53 is partially suspended in the working area 300, so that the heating efficiency of the bottom of the material is improved.

Further, the annealing furnace further comprises a spraying device 700 positioned below the carrying device 500, the outlets of the two vertical sections 22 are communicated with the spraying device 700, and the two spraying devices 700 are positioned at two sides of the bottom of the working area 300 and are oppositely arranged. The injection apparatus 700 includes a first injection head 71 and a second injection head 72 connected at the vertical section 22, and the air flow flowing into the vertical section 22 may flow out from the first injection head 71 and the second injection head 72. In this embodiment, the first nozzle 71 is located below the second nozzle 72, the first nozzle 71 is disposed along the horizontal direction, and can eject horizontal airflow to sufficiently and uniformly heat the bottom of the material on the carrying device 500, thereby avoiding uneven heating of the bottom of the material due to the shielding of the tray 53. The second nozzle 72 is inclined upward relative to the first nozzle 71, and is capable of blowing an air flow upward from the bottom of the material to heat the peripheral side and the top of the material. The first spray head 71 and the second spray head 72 which spray airflow in different directions are adopted, so that the airflow flowing out of the vertical section 22 can be divided into a plurality of strands of airflow and move towards different directions of the hearth 11, the airflow movement direction can be adjusted according to the charging condition of the hearth 11, the airflow movement and the heat convection at the dead angle position of the hearth 11 are enhanced, the local high temperature of the material caused by concentrated air outlet is avoided, and the problem of the uniformity of the thermal field of the hearth 11 is solved by combining the circulating fan 400. Preferably, the air inlet 42 is located right above the carrying device 500, so that the air flow flows back upwards uniformly around the material, thereby further ensuring uniform heating around and at the top of the material.

Preferably, the first spray head 71 and the second spray head 72 adopt a valve structure capable of controlling flow and on-off, so as to selectively control on-off and flow of the first spray head 71 or the second spray head 72 according to different materials.

Further, in this embodiment, the carrying device 500 is provided in a plurality and arranged side by side, so that the annealing furnace can heat treat a plurality of materials at the same time. Each bearing device 500 is provided with a circulating fan 400, a heating device 600 and an injection device 700 so as to provide sufficient heat for the air flow in the flow guider 200, ensure the heating efficiency, and simultaneously ensure that the air flow at each material position flows uniformly and orderly, and ensure that the materials are heated uniformly.

Furthermore, the annealing furnace also comprises a furnace door 900 for opening and closing the furnace body 100, and the furnace door 900 adopts a furnace door with a plug body so as to improve the tightness of the furnace door 900 and the furnace body 100.

The working process of the utility model is as follows: placing the tray 53 filled with the material to be heat-treated on a bearing device 500 in the furnace body 100; starting the circulating fan 400 and the heating device 600, blowing the air flow from the circulating fan 400 to the heating device 600, and allowing the air flow heated by the heating device 600 to flow to the vertical section 22 along the two ends of the horizontal section 21 of the flow guider 200; the air flow is guided to the bottom of the furnace 11 through the vertical section 22 and is sprayed to the working area 300 by the first spray head 71 and/or the second spray head 72 to heat the material in the working area 300, and in the process, the air inlet 42 of the circulating fan 400 can suck the air flow back from the working area, so that the air flow is circulated, and the temperature in the working area 300 tends to be uniform.

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.

Claims

1. A kind of circulating wind annealer, characterized by comprising:

a furnace body (100) having a furnace chamber (11) therein;

the flow guider (200) is positioned in the hearth (11) and comprises a horizontal section (21) and vertical sections (22) connected to two ends of the horizontal section (21), one end, far away from the horizontal section (21), of each vertical section (22) is connected with the furnace body (100), a working area (300) is enclosed between the flow guider (200) and the inner wall of the hearth (11), and the vertical sections (22) are provided with outlets communicated with the working area (300);

the circulating fan (400) is arranged on the furnace body (100) and comprises an air outlet (41) and an air inlet (42) for backflow, wherein the air outlet (41) is positioned in the flow guider (200);

a heating device (600) located within the flow director (200);

and the airflow distributor (800) is connected with the circulating fan (400) and comprises an air inlet cylinder (81) extending into the working area (300), and a plurality of air nozzles communicated with the air inlet (42) are arranged on the air inlet cylinder (81).

2. The circulating air annealing furnace according to claim 1, wherein the diameter of the air inlet drum (81) is gradually increased from one end near the circulating fan (400) to the other end, and the tuyere is positioned at a position near the outer edge of the air inlet drum (81).

3. The circulating air lehr of claim 2 wherein the air inlet drum (81) is located at a top intermediate position of the work zone (300).

4. The circulating air annealing furnace according to claim 1, wherein the circulating fan (400) has a plurality of outlets (41) facing the two ends of the horizontal section (21), and the heating devices (600) have a plurality of outlets (41) corresponding to the outlets (41).

5. A circulating air lehr according to claim 1 wherein a carrier (500) is provided in the working zone (300) for carrying the material to be heat treated, the outlet of the vertical section (22) being located below the carrier (500).

6. A circulating air annealing furnace according to claim 5, characterized in that the carrier means (500) comprises a plurality of carrier posts (51) fixed to the bottom wall of the hearth (11) and a cross beam (52) horizontally fixed to the carrier posts (51), and that the trays (53) containing the material to be heated are placed on the cross beam (52).

7. The circulating air annealing furnace according to claim 5, characterized in that the carrying device (500) is provided in plurality, and the circulating fan (400) and the heating device (600) are provided at each carrying device (500).

8. The circulating air annealing furnace according to claim 1, characterized in that the horizontal section (21) is formed by matching two horizontal deflectors (211) horizontally arranged relative to the furnace body (100), or the horizontal section (21) is formed by matching the horizontal deflectors (211) with the top wall of the hearth (11).

9. The circulating air annealing furnace according to claim 1, characterized in that the vertical section (22) is enclosed by two vertical baffles (221) arranged vertically with respect to the furnace body (100), or the vertical section (22) is formed by the vertical baffles (221) and the side walls of the furnace chamber (11) in cooperation.

10. The circulating air lehr of claim 1, wherein the air outlet (41) of the circulating fan (400) is located in the horizontal section (21), and the flow director (200) further includes a transition section (23) that is received obliquely between the horizontal section (21) and the vertical section (22) to form a chamfer between the horizontal section (21) and the vertical section (22).