Energy-saving cover well type spheroidizing annealing furnace and using method thereof

Abstract

The invention relates to the technical field of annealing furnaces, in particular to an energy-saving cover well type spheroidizing annealing furnace and a using method thereof.The energy-saving cover well type spheroidizing annealing furnace comprises an annealing furnace body which comprises a furnace body and a furnace cover installed on the furnace body; the heat conduction component comprises a fan installed on the furnace cover and a first heat conduction channel arranged in the furnace cover and communicated with a fan shell, a second heat conduction channel is arranged in the furnace body, and a heat conduction insertion pipe and an insertion hole are arranged between the furnace cover and the furnace body. And by arranging the heat conduction insertion pipe and the insertion hole, heat at the furnace cover is transferred to the bottom of the furnace body, the problem that the temperature of the furnace bottom is not ideal is solved, and the quality and mechanical performance of wire rod spheroidizing annealing are improved. Although the arrangement of the heat conduction insertion pipe may influence the convenience of covering the furnace cover, the diameter of the insertion hole is set to be far greater than the diameter of the heat conduction insertion pipe, so that the requirement of accurate positioning is avoided, the furnace cover is more convenient to cover, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of annealing furnaces, in particular to an energy-saving hood-type spheroidizing annealing furnace and a use method thereof. Background Art

[0002] At present, the hood-type spheroidizing annealing furnace is widely used in the heat treatment process of metal materials such as wires to improve the organizational structure and mechanical properties of the materials. The traditional hood-type spheroidizing annealing furnace usually includes the main components such as the furnace body, the furnace cover, the heating element, and the circulating fan. The furnace body is used to accommodate the wire to be treated. The furnace cover closes the furnace body during operation to maintain the internal protective atmosphere. The heating element is usually arranged on the side wall or the furnace cover of the furnace body to provide the required heat. The circulating fan is used to promote the uniform distribution of heat in the furnace to ensure that the temperature of each part of the wire is uniform during the annealing process, so as to obtain a good spheroidizing effect. However, the existing hood-type spheroidizing annealing furnace still has some shortcomings in design and use.

[0003] In actual applications, due to the natural rise of heat, most of the heat will gather near the top cover of the annealing furnace, resulting in a low temperature at the bottom of the furnace, which cannot achieve the ideal heating effect. This uneven temperature distribution not only affects the spheroidization quality of the wire, reduces the mechanical properties of the product, but also may lead to a decrease in production efficiency. In addition, the existing annealing furnace also has a certain waste in heat utilization, and cannot effectively transfer the heat near the cover to the bottom of the furnace, further exacerbating the uneven temperature in the furnace. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing annealing furnace also has a certain waste in heat utilization and cannot effectively transfer the heat near the furnace cover to the furnace bottom, which aggravates the unevenness of the temperature in the furnace.

[0005] The above technical problem is solved by the following technical solution: The present invention proposes an energy-saving hood-type spheroidizing annealing furnace, comprising an annealing furnace body, which comprises a furnace body and a furnace cover installed on the furnace body; A heat-conducting component includes a fan installed on the furnace cover, and a first heat-conducting channel arranged inside the furnace cover and connected to the fan housing, a second heat-conducting channel is arranged inside the furnace body, and a heat-conducting plug and a plug hole are arranged between the furnace cover and the furnace body. The heat-conducting plug connects the first heat-conducting channel and the second heat-conducting channel to guide the heat at the furnace cover to the bottom of the furnace body.

[0006] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: the first heat conduction channel and the second heat conduction channel correspond to each other and are provided with a plurality of channels, which are distributed in the wall of the annealing furnace body at equal intervals in an annular manner. At the same time, a plurality of heat-conducting inserts are provided, and correspond one-to-one to the first heat-conducting channels and the second heat-conducting channels.

[0007] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: the heat-conducting insert is arranged on the lower surface of the furnace cover, which includes a tube body, a centering piece installed at the lower end of the tube body, and an air bag installed on the outer wall of the tube body.

[0008] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: the centering member includes a plurality of accommodating grooves opened at equal intervals in an annular manner on the outer wall of the tube body, and a pushing plate is arranged in the accommodating groove, and one end of the support rod of each of the pushing plates is located at the center of the tube body, and a liftable conical rod is coaxially arranged in the tube body, and each of the support rods is located on the outer wall of the conical rod, and a first spring for pushing it to be retracted into the tube body is arranged on the outer wall of each of the support rods, a ball is arranged at the bottom of the conical rod, and a limit rod fixed to the inside of the tube body is arranged on the side of the conical rod.

[0009] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: the heat-conducting plug is inserted into the plug hole, the plug hole is arranged on the upper surface of the furnace body, and the lower end of the conical rod protrudes from the lower end of the tube body and contacts with the bottom surface of the plug hole.

[0010] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: an inclined partition is arranged inside the tube body, which divides the tube body into two parts, the air bag surrounds the outer wall of the tube body, and one end thereof is connected to the upper half, and the other end is connected to the lower half.

[0011] In a preferred embodiment of the energy-saving hood-well type spheroidizing annealing furnace of the present invention: after the air bag is inflated, it fills the space between the outer wall of the tube body and the inner wall of the plug hole.

[0012] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: a plurality of cavities are arranged in an annular manner at equal intervals inside the housing of the fan, each cavity is provided with an air duct, the air duct is connected to an annular channel arranged inside the furnace cover, the upper end of each of the heat-conducting inserts is connected to the annular channel, and the first heat-conducting channel includes each of the air ducts and the annular channel. The second inlet passages are provided with a plurality of them, the upper ends of which are connected with the plug-in holes, and the lower ends of which are provided with air outlets at the inner bottom of the furnace body.

[0013] In a preferred embodiment of the energy-saving hood-type spheroidizing annealing furnace of the present invention: the annealing furnace body further comprises a lifter arranged on the side of the furnace body, which is used to separate or cover the furnace cover from the furnace body; A heating element is arranged on the inner wall of the furnace body.

[0014] The above technical problem is also solved by the following technical solution: The present invention also proposes a method for using an energy-saving hood-well type spheroidizing annealing furnace, including the energy-saving hood-well type spheroidizing annealing furnace, and comprising the following steps: The lifter drives the furnace cover to rise and open the furnace body, and then the wire and material basket are placed into the furnace body through the trolley; Then the lifter drives the furnace cover to descend. When the furnace cover descends, its conical rod first contacts the bottom surface of the plug-in hole, and as the furnace cover continues to slowly descend, each squeezing and pushing plate is pushed out synchronously, so as to perform the centering operation in the plug-in hole. At the same time, the plug-in guide tubes at various positions are operated simultaneously to realize the centering of the axis between the furnace cover and the furnace body. When the furnace cover is completely closed, formal processing begins; During the processing, the fan absorbs heat into the first heat conduction channel and enters the plug-in duct, passing through the airbag in the plug-in duct, thereby first blowing the airbag to fill the entire plug-in hole, then entering the plug-in hole, and finally entering the bottom of the furnace body along the second heat conduction channel until the processing is completed.

[0015] The beneficial effects of the present invention are as follows: the present invention transfers the heat at the furnace cover to the bottom of the furnace body by setting a heat-conducting insert and a plug hole, thereby solving the problem of unsatisfactory furnace bottom temperature and improving the quality and mechanical properties of wire spheroidizing annealing. Although the setting of the heat-conducting insert may affect the convenience of closing the furnace cover, by setting the plug hole diameter much larger than the heat-conducting insert diameter, the need for precise positioning is avoided, making the furnace cover easier to close and improving work efficiency. A centering piece is set on the plug-in conduit to achieve the centering of the furnace cover and the furnace body, and the first soft seal is formed by setting the air bag to expand, and the second hard seal is formed by closing the furnace cover. This double sealing design ensures effective heat transfer and uniform distribution, prevents heat leakage, and improves energy utilization efficiency. The centering piece allows fine-tuning of the position when the furnace cover is not completely closed to ensure that the heat-conducting insert is accurately inserted into the plug hole. This method of inserting first and then fine-tuning simplifies the operation process and reduces failures and maintenance costs. In summary, the present invention solves the shortcomings of the existing hood-type spheroidizing annealing furnace in terms of furnace bottom temperature uniformity, furnace cover closing convenience and sealing performance through structural optimization and process improvement, and provides a more efficient, reliable and energy-saving solution for the heat treatment of metal materials such as wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention. Among them: Figure 1 The schematic diagram of the appearance structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention is shown in FIG. Figure 1 ; Figure 2 The schematic diagram of the appearance structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the cross-sectional structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention; Figure 5 for Figure 4 A schematic diagram of the structure enlargement in the middle; Figure 6 It is a structural schematic diagram of the furnace cover part of the present invention.

[0017] In the figure: 1. Annealing furnace body; 11. Furnace body; 12. Furnace cover; 13. Elevator; 14. Heating element; 2. Heat-conducting component; 21. Fan; 211. Shell; 212. Cavity; 22. First heat-conducting channel; 221. Air duct; 222. Annular channel; 23. Second heat-conducting channel; 231. Air outlet; 24. Heat-conducting insert; 241. Tube body; 242. Centering piece; 2421. Accommodating groove; 2422. Push plate; 2423. Support rod; 2424. Conical rod; 2425. First spring; 2426. Ball; 2427. Limit rod; 243. Air bag; 244. Partition; 25. Connecting hole. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below in conjunction with specific implementation methods and drawings.

[0019] The terms used in the present invention are those general terms currently widely used in the art in consideration of the functions of the present invention, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as a general description based on the meaning of the terms and the present invention.

[0020] Reference Figure 1-Figure 6The present embodiment provides an energy-saving hood-type spheroidizing annealing furnace, comprising an annealing furnace body 1, which comprises a furnace body 11 and a furnace cover 12 installed on the furnace body 11; a heat-conducting component 2, which comprises a fan 21 installed on the furnace cover 12, and a first heat-conducting channel 22 connected to a housing 211 of the fan 21 arranged inside the furnace cover 12, a second heat-conducting channel 23 arranged inside the furnace cover 12, a heat-conducting insert 24 and a plug hole 25 arranged between the furnace cover 12 and the furnace body 11, and the heat-conducting insert 24 connects the first heat-conducting channel 22 and the second heat-conducting channel 23 to guide the heat at the furnace cover 12 to the bottom of the furnace body 11. The annealing furnace body 1 also includes a lift 13 arranged on the side of the furnace body 11, which is used to separate or cover the furnace cover 12 from the furnace body 11; a heating element 14 is arranged on the inner wall of the furnace body 11. The heat-conducting insert 24 is disposed on the lower surface of the furnace cover 12 , and includes a tube body 241 , a centering piece 242 installed at the lowermost end of the tube body 241 , and an air bag 243 installed on the outer wall of the tube body 241 .

[0021] In this embodiment, the annealing furnace body 1 includes a furnace body 11 and a furnace cover 12. The furnace body 11 is the main structure for accommodating wire materials waiting to be processed, and the furnace cover 12 is used to close the furnace body 11 during operation to maintain the internal protective atmosphere and prevent the outside air from entering and affecting the annealing effect. The elevator 13 is arranged on the side of the furnace body 11, and is used to control the lifting and lowering of the furnace cover 12. The elevator 13 drives the furnace cover 12 to rise and open the furnace body 11, which is convenient for putting in the wire and material basket; when it is lowered, the furnace cover 12 is covered with the furnace body 11, ready for processing. The heating element 14 is installed on the inner wall of the furnace body 11 to provide the heat required for annealing. The arrangement of the heating element 14 should ensure the uniform distribution of heat in the furnace to improve the annealing effect.

[0022] The heat-conducting component 2 is the key to achieve heat transfer from the furnace cover 12 to the bottom of the furnace body 11. It includes a fan 21 installed on the furnace cover 12, and a first heat-conducting channel 22 connected to the fan 21 housing 211 arranged inside the furnace cover 12. A second heat-conducting channel 23 is also arranged inside the furnace body 11. The heat-conducting insert 24 and the plug hole 25 are arranged between the furnace cover 12 and the furnace body 11. The function of the heat-conducting insert 24 is to connect the first heat-conducting channel 22 and the second heat-conducting channel 23, so as to guide the heat accumulated at the furnace cover 12 to the bottom of the furnace body 11, solving the problem of unsatisfactory furnace bottom temperature. The heat-conducting insert 24 is located on the lower surface of the furnace cover 12, including a tube body 241, a centering piece 242 installed at the lower end of the tube body 241, and an air bag 243 installed on the outer wall of the tube body 241. The centering piece 242 ensures the axial centering between the furnace cover 12 and the furnace body 11, paving the way for the subsequent air bag 243 to completely fill the entire plug hole 25; the air bag 243 expands and fills the entire plug hole 25 during the processing, ensuring the efficiency and uniformity of heat transfer.

[0023] Reference Figure 1-Figure 6, Explanation of the use of energy-saving hood-type spheroidizing annealing furnace: Step 1: The lifter 13 drives the furnace cover 12 to rise and open the furnace body 11, and then the wire and the material basket are placed into the furnace body 11 through the trolley. In this step, the lifter 13 is used to raise the furnace cover 12, thereby opening the furnace body 11, so as to facilitate the placement of the wire and the material basket to be processed into the furnace.

[0024] Step 2: The lifter 13 drives the furnace cover 12 to descend. When the furnace cover 12 descends, its tapered rod 2424 first contacts the bottom surface of the plug hole 25, and as the furnace cover 12 continues to slowly descend, each squeezing and pushing plate 2422 is pushed out synchronously, so as to perform a centering operation in the plug hole 25. At the same time, the plugging guide tubes at various positions are operated simultaneously to achieve the centering of the furnace cover 12 and the furnace body 11. In this step, the contact between the tapered rod 2424 and the bottom surface of the plug hole 25 and the push-out of the squeezing and pushing plate 2422 are to ensure the precise centering between the furnace cover 12 and the furnace body 11, to pave the way for the subsequent air bag 243 to completely fill the entire plug hole 25, and also to ensure the uniformity of subsequent heat transfer.

[0025] Step 3: When the furnace cover 12 is completely covered, formal processing is carried out. At this time, the furnace cover 12 and the furnace body 11 have been tightly covered, and a closed protective atmosphere environment is formed inside. The heating element 14 starts to work to provide the required heat for the annealing process.

[0026] Step 4: During the processing, the fan 21 absorbs the heat into the first heat conduction channel 22 and enters the plug-in conduit, passes through the airbag 243 in the plug-in conduit, and first blows the airbag 243 to fill the entire plug-in hole 25, then enters the plug-in hole 25, and finally enters the bottom of the furnace body 11 along the second heat conduction channel 23 until the processing is completed. In this step, the function of the fan 21 is to transfer the heat at the furnace cover 12 to the bottom of the furnace body 11 through the heat conduction channel, and the expansion of the airbag 243 ensures the efficiency and uniformity of heat transfer, and finally realizes the increase of the furnace bottom temperature, solving the problem of unsatisfactory furnace bottom temperature in the prior art.

[0027] The effects are as follows: (1) improving the uniformity of furnace bottom temperature: by providing the heat-conducting insert 24 and the plug hole 25, the heat at the furnace cover 12 is effectively transferred to the bottom of the furnace body 11, thereby solving the problem of unsatisfactory furnace bottom temperature in the prior art and improving the quality and mechanical properties of the wire spheroidizing annealing.

[0028] (2) Simplifying the closing operation of the furnace cover 12: Although the setting of the heat-conducting insert 24 may originally affect the convenience of closing the furnace cover 12, by setting the diameter of the plug hole 25 to be much larger than the diameter of the heat-conducting insert 24, the need for precise positioning is avoided, making the closing operation of the furnace cover 12 easier and improving work efficiency.

[0029] (3) Double sealing guarantee: The centering piece 242 is arranged on the plug-in conduit to realize the axial centering between the furnace cover 12 and the furnace body 11. The first soft seal is realized by the expansion of the air bag 243. The furnace cover 12 covers the furnace body 11 to form a second hard seal. This double sealing design ensures the effective transfer and uniform distribution of heat in the furnace, while preventing heat leakage and improving energy utilization efficiency.

[0030] (4) Accurate centering adjustment: The design of the centering piece 242 allows for fine adjustments to the position when the furnace cover 12 is not fully closed, ensuring that the heat transfer plug 24 is accurately inserted into the plug hole 25. This idea of ​​inserting first and then fine-tuning not only ensures the correct connection between the heat transfer plug 24 and the plug hole 25, but also simplifies the operation process and reduces failures and maintenance costs caused by inaccurate positioning.

[0031] Through the above design, the present invention not only improves the heating efficiency and temperature uniformity of the annealing furnace, but also enhances the reliability and safety of the equipment, reduces the operating risk, and prolongs the service life of the equipment. The present invention effectively solves the deficiencies of the existing hood-type spheroidizing annealing furnace in terms of furnace bottom temperature uniformity, furnace cover 12 closing convenience, and sealing performance, and provides a more efficient, reliable, and energy-saving solution for the heat treatment of metal materials such as wire rods.

[0032] Reference Figure 3-Figure 6 The first heat-conducting channel 22 and the second heat-conducting channel 23 correspond to each other and are provided with a plurality of them, which are distributed in an annular manner at equal intervals in the wall of the annealing furnace body 1. At the same time, a plurality of heat-conducting inserts 24 are also provided, which correspond to the first heat-conducting channel 22 and the second heat-conducting channel 23. A plurality of cavities 212 are provided in an annular manner at equal intervals inside the housing 211 of the fan, and each cavity 212 is provided with an air duct 221, which is connected to the annular channel 222 provided inside the furnace cover 12, and the upper end of each heat-conducting insert 24 is connected to the annular channel 222. The first heat-conducting channel 22 includes each air duct 221 and the annular channel 222. The second heat-conducting channel 23 is provided with a plurality of them, and the upper end thereof is connected to the plug hole 25, and the lower end is provided with an air outlet 231 at the bottom of the furnace body 11.

[0033] In this embodiment, the fan rotates to absorb the heat near the furnace top into the shell 211, and the heat enters the air duct 221 along the cavities 212 in the shell 211, and then merges into the annular channel 222 inside the furnace cover 12. The annular channel 222 evenly distributes the heat to each heat-conducting insert 24. These heat-conducting inserts 24 correspond to the first heat-conducting channel 22 and the second heat-conducting channel 23, ensuring that the heat can be accurately transferred from the furnace cover 12 to the bottom of the furnace body 11, thereby improving the uniformity of the furnace bottom temperature, thereby improving the quality and mechanical properties of the wire spheroidizing annealing.

[0034] In terms of specific structure, the first heat-conducting channel 22 and the second heat-conducting channel 23 are distributed in an annular manner with equal spacing in the wall of the annealing furnace body 1, and the number corresponds. This layout makes the heat more uniform during the transfer process, avoiding local overheating or low temperature. The number of heat-conducting inserts 24 also corresponds to it, ensuring that each heat-conducting channel can effectively transfer heat, thereby improving the efficiency of heat transfer. There are multiple annular cavities 212 with equal spacing in the fan housing 211, and each cavity 212 is connected to an air duct 221. The air duct 221 transports heat to the annular channel 222 in the furnace cover 12. The design of the annular channel 222 allows the heat to be evenly distributed to each heat-conducting insert 24, further improving the uniformity of temperature. The heat in the annular channel 222 is transferred through each heat-conducting insert 24. The upper end of the second heat-conducting channel 23 is connected to the plug hole 25, and the lower end is provided with an air outlet 231 at the bottom of the furnace body 11, so that the heat can be evenly distributed to the bottom of the furnace body 11, ensuring the stability of the temperature in the entire furnace, reducing energy waste, and improving annealing efficiency.

[0035] In the present invention, in order to achieve the connection between the first heat-conducting channel 22 on the furnace cover 12 and the second heat-conducting channel 23 in the furnace body 11, a heat-conducting insert 24 and a plug hole 25 are specially designed as connecting parts. However, the introduction of the heat-conducting insert 24 may affect the closing operation of the furnace cover 12, because the closing of the traditional furnace cover 12 does not require precise positioning, but now in order to ensure that the heat-conducting insert 24 can be accurately inserted into the plug hole 25, it seems that precise positioning is required, which undoubtedly increases the complexity of the operation. In order to solve this problem, we optimize the size of the plug hole 25 and set its diameter to be much larger than the diameter of the heat-conducting insert 24. The advantage of this design is that even if there is a certain position deviation during the closing process of the furnace cover 12, the heat-conducting insert 24 can be smoothly inserted into the plug hole 25, thereby avoiding the strict requirements for precise positioning, making the closing operation of the furnace cover 12 more convenient and efficient.

[0036] However, the increase in the diameter of the plug hole 25 may cause another problem, that is, the sealing performance between the heat-conducting plug 24 and the plug hole 25 may be affected. In order to solve this potential sealing problem, we add a centering piece 242 to the plug-in conduit. The function of the centering piece 242 is to make a slight adjustment to the position of the furnace cover 12 through its own structural design when the furnace cover 12 is not completely covered, so as to ensure that the heat-conducting plug 24 can be accurately aligned and inserted into the plug hole 25. In the actual operation process, when the furnace cover 12 is lowered, the heat-conducting plug 24 is first inserted into the plug hole 25, and then the position of the furnace cover 12 is fine-tuned through the adjustment of the centering piece 242 to achieve more accurate centering. After the centering is completed, the air bag 243 expands and fills the entire plug hole 25 when it is officially used, thereby realizing the first soft seal, which effectively prevents heat from leaking around the plug hole 25 and ensures that heat can be efficiently transferred from the furnace cover 12 to the bottom of the furnace body 11. In addition, when the furnace cover 12 is completely covered on the furnace body 11, a second hard seal is formed, further enhancing the sealing performance of the entire system. This double sealing design concept not only ensures the sealing effect between the heat-conducting plug 24 and the plug hole 25, but also improves the heat utilization efficiency and temperature uniformity of the entire annealing furnace, providing a more reliable and energy-saving solution for the spheroidizing annealing of metal materials such as wires.

[0037] Reference Figure 3-Figure 6 The centering member 242 includes a plurality of receiving grooves 2421 annularly and evenly spaced on the outer wall of the tube body 241, and a pushing plate 2422 is arranged in the receiving groove 2421. One end of a support rod 2423 of each pushing plate 2422 is located at the center of the tube body 241. A liftable conical rod 2424 is coaxially arranged in the tube body 241, and each support rod 2423 is located on the outer wall of the conical rod 2424. A first spring 2425 for pushing the support rod 2423 to be retracted into the tube body 241 is arranged on the outer wall of each support rod 2423, and a ball 2426 is arranged at the bottom of the conical rod 2424, and a limiting rod 2427 fixed to the inside of the tube body 241 is arranged on the side of the conical rod 2424. The heat conducting insert 24 is inserted into the insert hole 25 , which is arranged on the upper surface of the furnace body 11 , and the lower end of the tapered rod 2424 protrudes from the lower end of the tube body 241 and contacts the bottom surface of the insert hole 25 .

[0038] It should be noted that the structure design of the centering member 242 is exquisite. The outer wall of the tube body 241 is provided with a plurality of receiving grooves 2421 at equal intervals in an annular shape. A pushing plate 2422 is arranged in the groove. One end of the support rod 2423 of each pushing plate 2422 is concentrated at the center of the tube body 241, where a lifting conical rod 2424 is coaxially arranged. When the furnace cover 12 slowly descends, the conical rod 2424 first contacts the bottom of the plug hole 25 and is squeezed upward. As the conical rod 2424 rises, it drives the support rods 2423 arranged in an annular shape at equal intervals around it to overcome the inward thrust of the first spring 2425 and move outward. The outward movement of the support rod 2423 drives the pushing plate 2422 to move out of the receiving groove 2421 and fit closely to the inner wall of the plug hole 25, so as to realize the accurate centering of the furnace cover 12 and the furnace body 11. This centering method not only improves the centering accuracy, but also ensures the uniformity of subsequent heat transfer. The ball bearing 2426 at the bottom of the tapered rod 2424 helps to reduce friction with the bottom surface of the plug hole 25, making it easier to adjust the position of the furnace cover 12 on the furnace body 11. The side-fixed limit rod 2427 limits the lifting and lowering of the tapered rod 2424 while supporting it, ensuring the stability and reliability of the centering process.

[0039] Reference Figure 3-Figure 6 An inclined partition 244 is provided inside the tube body 241, which divides the tube body 241 into two parts, an airbag 243 surrounds the outer wall of the tube body 241, and one end of the airbag 243 is connected to the upper part, and the other end is connected to the lower part. After the airbag 243 is inflated, it fills the space between the outer wall of the tube body 241 and the inner wall of the plug hole 25.

[0040] It should be noted that the interior of the tube body 241 of the heat-conducting insert 24 is divided into two parts, upper and lower, by the inclined partition 244, so that the hot air can flow along a predetermined path. The outer wall of the heat-conducting insert 24 surrounds the airbag 243, and its two ends are connected to the upper and lower parts of the tube body 241 respectively. After the alignment is completed, the hot air enters the upper part of the tube body 241 through the first heat-conducting channel 22, and then flows into the airbag 243, so that the airbag 243 expands and fills the space between the outer wall of the tube body 241 and the inner wall of the plug hole 25 to form a seal. Subsequently, the hot air continues to enter the lower part of the tube body 241 through the airbag 243, and reaches the bottom of the furnace body 11 through the second heat-conducting channel 23. This process not only realizes the effective transfer of heat, but also ensures the sealing of the plug-in part through the expansion of the airbag 243, prevents heat leakage, and improves energy utilization efficiency.

[0041] Reference Figure 1-Figure 6 , a method for using an energy-saving hood-type spheroidizing annealing furnace, comprising the following steps: Preparation stage: The lift 13 drives the furnace cover 12 to rise and open the furnace body 11. The wire and material basket are placed into the furnace body 11 through a trolley.

[0042] The furnace cover 12 is lowered and aligned: the lift 13 drives the furnace cover 12 to lower. When the furnace cover 12 is lowered, the conical rod 2424 first contacts the bottom surface of the plug hole 25. As the furnace cover 12 continues to slowly lower, the conical rod 2424 is squeezed and moved upward, driving the support rods 2423 arranged in a circular shape with equal spacing around to move outward to overcome the inward thrust of the first spring 2425. The outward movement of the support rods 2423 drives the squeezing and pushing plates 2422 to move out of the receiving groove 2421 and fit the inner wall of the plug hole 25, so as to achieve accurate alignment of the furnace cover 12 and the furnace body 11.

[0043] The furnace cover 12 is completely covered: after the centering is completed, the furnace cover 12 continues to descend until it is completely covered on the furnace body 11, forming a second hard seal.

[0044] Processing process: Start the fan to absorb the heat near the furnace top into the shell 211. The heat enters the air duct 221 along the cavities 212 in the shell 211, and then flows into the annular channel 222 inside the furnace cover 12. The annular channel 222 evenly distributes the heat to each heat-conducting plug 24. The hot air enters the upper half of the tube body 241 through the first heat-conducting channel 22, and then flows into the air bag 243, causing the air bag 243 to expand and fill the space between the outer wall of the tube body 241 and the inner wall of the plug hole 25, forming the first soft seal. Subsequently, the hot air enters the lower half of the tube body 241 through the air bag 243, and reaches the bottom of the furnace body 11 through the second heat-conducting channel 23, realizing effective heat transfer and uniform distribution.

[0045] Finishing the process: During the process, the temperature and atmosphere in the furnace are continuously monitored to ensure the quality of the wire spheroidizing annealing. After reaching the predetermined annealing time and temperature, the heating and the fan are stopped, and the furnace body 11 is allowed to cool naturally or forcibly.

[0046] Out of the furnace: After processing is completed, the lift 13 drives the furnace cover 12 to rise and open the furnace body 11. The annealed wire and material basket are taken out by the trolley for subsequent processing or inspection.

[0047] In the whole workflow, the effective transfer and uniform distribution of heat are achieved through the ingenious structural design and optimization of the operation steps, the uniformity of the furnace bottom temperature is improved, and the quality and mechanical properties of the wire spheroidizing annealing are improved. At the same time, the double sealing design and the precise adjustment of the centering piece 242 ensure the reliability and energy efficiency of the equipment, and reduce the difficulty of operation and maintenance costs.

[0048] Finally, it should be pointed out that the methods and devices described in detail above are only embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. An energy-saving hood-type spheroidizing annealing furnace, characterized in that: include, An annealing furnace body (1), comprising a furnace body (11) and a furnace cover (12) mounted on the furnace body (11); A heat-conducting component (2), comprising a fan (21) mounted on the furnace cover (12), and a first heat-conducting channel (22) arranged inside the furnace cover (12) and connected to a housing (211) of the fan (21); a second heat-conducting channel (23) is arranged inside the furnace body (11); a heat-conducting insert (24) and a plug hole (25) are arranged between the furnace cover (12) and the furnace body (11); the heat-conducting insert (24) connects the first heat-conducting channel (22) and the second heat-conducting channel (23) for conducting heat at the furnace cover (12) to the bottom of the furnace body (11); The first heat conducting channel (22) and the second heat conducting channel (23) correspond to each other one by one and are provided in plurality, and are distributed in an annular manner at equal intervals in the wall of the annealing furnace body (1). At the same time, a plurality of heat-conducting inserts (24) are provided, and correspond one-to-one to the first heat-conducting channels (22) and the second heat-conducting channels (23).

2. The energy-saving hood-type spheroidizing annealing furnace according to claim 1 is characterized in that: The heat-conducting insert (24) is arranged on the lower surface of the furnace cover (12), and comprises a tube body (241), a centering piece (242) installed at the lowermost end of the tube body (241), and an air bag (243) installed on the outer wall of the tube body (241).

3. The energy-saving hood-type spheroidizing annealing furnace according to claim 2 is characterized in that: The centering member (242) comprises a plurality of receiving grooves (2421) formed in an annular manner and at equal intervals on the outer wall of the tube body (241), wherein a pushing plate (2422) is arranged in the receiving groove (2421), and one end of a support rod (2423) of each pushing plate (2422) is located at the center of the tube body (241), and a liftable conical rod (2424) is coaxially arranged in the tube body (241), and each support rod (2423) is located on the outer wall of the conical rod (2424), and a first spring (2425) for pushing the support rod (2423) to be retracted into the tube body (241) is arranged on the outer wall of each support rod (2423), a ball (2426) is arranged at the bottom of the conical rod (2424), and a limiting rod (2427) fixed to the inside of the tube body (241) is arranged on the side of the conical rod (2424).

4. The energy-saving hood-type spheroidizing annealing furnace according to claim 3 is characterized in that: The heat-conducting plug (24) is inserted into the plug hole (25), the plug hole (25) is arranged on the upper surface of the furnace body (11), and the lower end of the tapered rod (2424) protrudes from the lower end of the tube body (241) and contacts the bottom surface of the plug hole (25).

5. The energy-saving hood-type spheroidizing annealing furnace according to claim 3 or 4, characterized in that: An inclined partition (244) is provided inside the tube body (241) to divide the tube body (241) into an upper and lower part. The airbag (243) surrounds the outer wall of the tube body (241), and one end thereof is connected to the upper part, and the other end is connected to the lower part.

6. The energy-saving hood-type spheroidizing annealing furnace according to claim 5 is characterized in that: After the air bag (243) is inflated, it fills the space between the outer wall of the tube body (241) and the inner wall of the plug hole (25).

7. The energy-saving hood-type spheroidizing annealing furnace according to claim 1 is characterized in that: A plurality of cavities (212) are arranged in an annular manner at equal intervals inside the shell (211) of the fan (21); each of the cavities (212) is provided with an air duct (221); the air duct (221) is connected to an annular channel (222) arranged inside the furnace cover (12); the upper end of each of the heat-conducting inserts (24) is connected to the annular channel (222); the first heat-conducting channel (22) includes each of the air ducts (221) and the annular channel (222); A plurality of second heat-conducting channels (23) are provided, the upper ends of which are connected to the plug-in holes (25), and the lower ends of which are provided with air outlets (231) at the bottom of the furnace body (11).

8. The energy-saving hood-type spheroidizing annealing furnace according to claim 1 is characterized in that: The annealing furnace body (1) further comprises a lifter (13) arranged on the side of the furnace body (11) and used for separating or closing the furnace cover (12) with the furnace body (11); A heating element (14) is arranged on the inner wall of the furnace body (11).

9. A method for using an energy-saving hood-type spheroidizing annealing furnace, characterized in that: The invention comprises the energy-saving hood-type spheroidizing annealing furnace according to any one of claims 1 to 8, and comprises the following steps: The lift drives the furnace cover to rise and open the furnace body, and then the wire and material basket are placed into the furnace body through the trolley; Then the lifter drives the furnace cover to descend. When the furnace cover descends, its conical rod first contacts the bottom surface of the plug-in hole, and as the furnace cover continues to slowly descend, each squeezing and pushing plate is pushed out synchronously, so as to perform the centering operation in the plug-in hole. At the same time, the plug-in guide tubes at various positions are operated simultaneously to realize the centering of the axis between the furnace cover and the furnace body. When the furnace cover is completely closed, formal processing begins; During the processing, the fan absorbs heat into the first heat conduction channel and enters the plug-in duct, passing through the airbag in the plug-in duct, thereby first blowing the airbag to fill the entire plug-in hole, then entering the plug-in hole, and finally entering the bottom of the furnace body along the second heat conduction channel until the processing is completed.

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