An energy-saving hooded type spheroidizing annealing furnace and its usage method

Abstract

The present invention relates to the technical field of annealing furnaces, and in particular to an energy-saving hood-type spheroidizing annealing furnace and its usage method, which includes an annealing furnace body comprising a furnace body and a furnace cover installed on the furnace body; a heat conduction component including a fan installed on the furnace cover and a first heat conduction channel provided inside the furnace cover and communicating with the fan housing, a second heat conduction channel is provided inside the furnace body, and heat conduction insertion pipes and insertion holes are provided between the furnace cover and the furnace body. By providing the heat conduction insertion pipes and the insertion holes, the heat at the furnace cover is transferred to the bottom of the furnace body, 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 conduction insertion pipes may affect the convenience of covering the furnace cover, by setting the diameter of the insertion holes much larger than the diameter of the heat conduction insertion pipes, the need for precise positioning is avoided, making the covering of the furnace cover more convenient and improving the work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of annealing furnaces, and in particular to an energy-saving cover well type spheroidizing annealing furnace and its usage method. Background Art

[0002] At present, cover well type spheroidizing annealing furnaces are widely used in the heat treatment process of metal materials such as wire rods to improve the organizational structure and mechanical properties of the materials. Traditional cover well type spheroidizing annealing furnaces generally include main components such as a furnace body, a furnace cover, heating elements, and circulation fans. The furnace body is used to accommodate the wire rods to be processed, the furnace cover closes the furnace body during operation to maintain the internal protective atmosphere, the heating elements are usually arranged on the side walls or the furnace cover of the furnace body to provide the required heat, and the circulation fans are used to promote the uniform distribution of heat in the furnace to ensure that the temperatures of all parts of the wire rods are uniform during the annealing process, so as to obtain a good spheroidizing effect. However, there are still some deficiencies in the design and use of existing cover well type spheroidizing annealing furnaces.

[0003] In practical applications, due to the characteristic that heat naturally rises, most of the heat will accumulate near the top furnace cover of the annealing furnace, resulting in a lower temperature at the furnace bottom and unable to achieve an ideal heating effect. This non-uniform temperature distribution not only affects the spheroidizing quality of the wire rods, reduces the mechanical properties of the products, but also may lead to a decrease in production efficiency. In addition, there is also a certain amount of waste in the heat utilization of existing annealing furnaces, and the heat near the furnace cover cannot be effectively transferred to the furnace bottom, further exacerbating the non-uniformity of the temperature in the furnace. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention lies in that: there is also a certain amount of waste in the heat utilization of existing annealing furnaces, and the heat near the furnace cover cannot be effectively transferred to the furnace bottom, exacerbating the non-uniformity of the temperature in the furnace.

[0005] The above technical problem is solved by the following technical solutions: The present invention provides an energy-saving cover well type spheroidizing annealing furnace, which includes an annealing furnace body, and the annealing furnace body includes a furnace body and a furnace cover installed on the furnace body;

[0006] A heat conduction component, which includes a fan installed on the furnace cover, and a first heat conduction channel arranged inside the furnace cover and communicated with the fan housing. A second heat conduction channel is arranged in the furnace body, and a heat conduction insertion tube and an insertion hole are arranged between the furnace cover and the furnace body. The heat conduction insertion tube communicates the first heat conduction channel and the second heat conduction channel to guide the heat at the furnace cover to the bottom of the furnace body.

[0007] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: the first heat conduction channels and the second heat conduction channels correspond to each other one by one and are all provided with multiple ones, and are annularly and equidistantly distributed in the wall of the annealing furnace body.

[0008] Meanwhile, a plurality of heat conduction insertion tubes are also provided, and they correspond one by one to the first heat conduction channel and the second heat conduction channel.

[0009] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: the heat conduction insertion tube is arranged on the lower surface of the furnace cover, and it includes a tube body, a centering member installed at the lowermost end of the tube body, and an air bag installed on the outer wall of the tube body.

[0010] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: the centering member includes a plurality of receiving grooves annularly and equidistantly formed on the outer wall of the tube body, a pushing plate is arranged in the receiving groove, one end of the support rod of each pushing plate is located at the center of the tube body, a liftable conical rod is coaxially arranged in the tube body, each support rod is located on the outer wall of the conical rod, and a first spring for pushing it back into the interior of the tube body is arranged on the outer wall of each support rod. A ball is arranged at the bottom of the conical rod, and a limiting rod fixed to the interior of the tube body is arranged on the side surface of the conical rod.

[0011] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: the heat conduction insertion tube is inserted into the insertion hole, the insertion 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 the bottom surface of the insertion hole.

[0012] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: an inclined partition is arranged inside the tube body, which divides the tube body into upper and lower parts. The air bag surrounds the outer wall of the tube body, and one end of it communicates with the upper half part and the other end communicates with the lower half part.

[0013] In a preferred embodiment of the energy-saving cover 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 insertion hole.

[0014] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: a plurality of cavities are annularly and equidistantly arranged inside the housing of the blower, each cavity is provided with an air duct, the air duct communicates with an annular channel arranged inside the furnace cover, the upper ends of the respective heat conduction insertion tubes are communicated with the annular channel, and the first heat conduction channel includes the respective air ducts and the annular channel.

[0015] A plurality of the second introduction channels are provided, the upper ends of which are communicated with the insertion holes, and the lower ends are provided with air outlets at the bottom inside the furnace body.

[0016] In a preferred embodiment of the energy-saving cover well type spheroidizing annealing furnace of the present invention: The annealing furnace body further includes a lift provided on the side of the furnace body for separating or closing the furnace cover from the furnace body;

[0017] Heating elements are provided on the inner wall of the furnace body.

[0018] The above technical problem is also solved by the following technical solution: The present invention also proposes a use method of an energy-saving cover well type spheroidizing annealing furnace, including the energy-saving cover well type spheroidizing annealing furnace as described above, and including the following steps:

[0019] The lift drives the furnace cover to rise and open the furnace body, and then the wire rod and the material basket are put into the furnace body together by the trolley;

[0020] Subsequently, the lift drives the furnace cover to descend. When the furnace cover descends, its conical rod first contacts the bottom surface of the insertion hole, and as the furnace cover continues to slowly descend, the extrusion plates at various positions are synchronously pushed out, so as to perform centering operation in the insertion hole. At the same time, the insertion ducts at various positions operate simultaneously to achieve the axial centering between the furnace cover and the furnace body;

[0021] When the furnace cover is completely closed, formal processing is carried out;

[0022] During the processing, the fan inhales heat into the first heat conduction channel and enters the insertion duct. Inside the insertion duct, it passes through the airbag, so as to first blow the airbag to expand and fill the entire insertion hole, then enter the insertion hole, and finally enter the bottom of the furnace body along the second heat conduction channel until the processing is completed.

[0023] The beneficial effects of the present invention are as follows: By providing the heat conduction insertion tube and the insertion hole, the present invention transfers the heat at the furnace cover to the bottom of the furnace body, solves the problem of unsatisfactory bottom temperature of the furnace, and improves the quality and mechanical properties of the wire rod spheroidizing annealing. Although the setting of the heat conduction insertion tube may affect the convenience of closing the furnace cover, by setting the diameter of the insertion hole much larger than the diameter of the heat conduction insertion tube, the need for precise positioning is avoided, making the closing of the furnace cover more convenient and improving the working efficiency. By providing a centering member on the insertion duct, the axial centering between the furnace cover and the furnace body is achieved, and a first soft seal is formed by the inflation of the airbag, and a second hard seal is formed when the furnace cover is closed. This double-seal design ensures the effective transfer and uniform distribution of heat, prevents heat leakage, and improves the energy utilization efficiency. The centering member allows for fine adjustment of the position when the furnace cover is not completely closed, ensuring that the heat conduction insertion tube is accurately inserted into the insertion hole. This way of inserting first and then fine-tuning simplifies the operation process and reduces the failure and maintenance costs. In summary, through structural optimization and process improvement, the present invention solves the deficiencies of the existing cover well type spheroidizing annealing furnace in terms of the bottom temperature uniformity of the furnace, the convenience of closing the furnace cover, and the sealing performance, and provides a more efficient, reliable and energy-saving solution for the heat treatment of metal materials such as wire rods. Brief Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention. Among them:

[0025] Figure 1 is a schematic view of the external structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention Figure 1 ;

[0026] Figure 2 is a schematic view of the external structure of the energy-saving hood-type spheroidizing annealing furnace of the present invention Figure 2 ;

[0027] Figure 3 is a schematic sectional split structure diagram of the energy-saving hood-type spheroidizing annealing furnace of the present invention;

[0028] Figure 4 is a schematic sectional combined structure diagram of the energy-saving hood-type spheroidizing annealing furnace of the present invention;

[0029] Figure 5 is Figure 4 a schematic enlarged view of the structure at A in

[0030] Figure 6 is a schematic view of the structure of the furnace cover part of the present invention.

[0031] In the figure:

[0032] 1. Annealing furnace body; 11. Furnace body; 12. Furnace cover; 13. Lift; 14. Heating element; 2. Heat conduction component; 21. Fan; 211. Housing; 212. Cavity; 22. First heat conduction channel; 221. Air duct; 222. Annular channel; 23. Second heat conduction channel; 231. Air outlet; 24. Heat conduction insertion tube; 241. Tube body; 242. Centering part; 2421. Accommodation groove; 2422. Pushing plate; 2423. Support rod; 2424. Tapered rod; 2425. First spring; 2426. Ball; 2427. Limit rod; 243. Airbag; 244. Partition plate; 25. Insertion hole. Detailed Embodiments

[0033] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the detailed embodiments and the drawings.

[0034] The terms used in the present invention are those general terms that are currently widely used in the art in consideration of the functions of the present invention. However, these terms may vary according to the intention of those 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 such cases, 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 based on the meanings of the terms and the overall description of the present invention.

[0035] Referring to Figures 1-6 , this embodiment provides an energy-saving hood-type spheroidizing annealing furnace, including an annealing furnace body 1, which includes a furnace body 11 and a furnace cover 12 installed on the furnace body 11; a heat conduction component 2, which includes a fan 21 installed on the furnace cover 12, and a first heat conduction channel 22 provided inside the furnace cover 12 and communicating with the housing 211 of the fan 21. A second heat conduction channel 23 is provided in the furnace body 11, and a heat conduction insertion tube 24 and an insertion hole 25 are provided between the furnace cover 12 and the furnace body 11. The heat conduction insertion tube 24 communicates the first heat conduction channel 22 and the second heat conduction channel 23 for guiding the heat at the furnace cover 12 to the bottom of the furnace body 11. The annealing furnace body 1 further includes a lift 13 provided on the side of the furnace body 11 for separating or closing the furnace cover 12 from the furnace body 11; a heating element 14 is provided on the inner wall of the furnace body 11. The heat conduction insertion tube 24 is provided on the lower surface of the furnace cover 12, and includes a tube body 241, a centering member 242 installed at the lowermost end of the tube body 241, and an airbag 243 installed on the outer wall of the tube body 241.

[0036] 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 the wire rod waiting for processing materials, and the furnace cover 12 is used to close the furnace body 11 during operation to maintain the internal protective atmosphere and prevent external air from entering and affecting the annealing effect. The lift 13 is provided on the side of the furnace body 11 for controlling the lifting of the furnace cover 12. The lift 13 drives the furnace cover 12 to rise to open the furnace body 11, facilitating the placement of the wire rod and the material basket; descending makes the furnace cover 12 close with the furnace body 11 to prepare for processing. The heating element 14 is installed on the inner wall of the furnace body 11 for providing the heat required for annealing. The arrangement of the heating element 14 should ensure uniform distribution of heat in the furnace to improve the annealing effect.

[0037] The heat-conducting component 2 is the key to realizing the 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 provided inside the furnace cover 12 and communicating with the housing 211 of the fan 21. A second heat-conducting channel 23 is also provided inside the furnace body 11. A heat-conducting insertion tube 24 and an insertion hole 25 are arranged between the furnace cover 12 and the furnace body 11. The function of the heat-conducting insertion tube 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 and solve the problem of unsatisfactory furnace bottom temperature. The heat-conducting insertion tube 24 is located on the lower surface of the furnace cover 12 and includes a tube body 241, a centering member 242 installed at the lowermost end of the tube body 241, and an airbag 243 installed on the outer wall of the tube body 241. The centering member 242 ensures the axial alignment between the furnace cover 12 and the furnace body 11, laying the foundation for the subsequent airbag 243 to completely fill the entire insertion hole 25. The airbag 243 expands and fills the entire insertion hole 25 during the processing to ensure the efficiency and uniformity of heat transfer.

[0038] Refer to Figures 1-6 , the usage method of the energy-saving cover well type spheroidizing annealing furnace is explained as follows:

[0039] Step 1: The elevator 13 drives the furnace cover 12 to rise to open the furnace body 11, and then the wire rod and the material basket are put into the furnace body 11 together by the trolley. In this step, the function of the elevator 13 is to make the furnace cover 12 rise, so as to open the furnace body 11 and facilitate the putting of the wire rod and the material basket to be processed into the furnace.

[0040] Step 2: The elevator 13 drives the furnace cover 12 to descend. When the furnace cover 12 descends, its conical rod 2424 first contacts the bottom surface of the insertion hole 25, and as the furnace cover 12 continues to slowly descend, the extrusion plates 2422 are synchronously pushed out, so as to perform centering operation in the insertion hole 25. At the same time, the insertion ducts at each position operate simultaneously to achieve the axial alignment between the furnace cover 12 and the furnace body 11. In this step, the contact between the conical rod 2424 and the bottom surface of the insertion hole 25 and the pushing out of the extrusion plates 2422 are both to ensure the precise alignment between the furnace cover 12 and the furnace body 11, laying the foundation for the subsequent airbag 243 to completely fill the entire insertion hole 25 and also ensuring the uniformity of subsequent heat transfer.

[0041] Step 3: When the furnace cover 12 is completely closed, formal processing is carried out. At this time, the furnace cover 12 and the furnace body 11 are tightly closed, forming a closed protective atmosphere environment inside, and the heating element 14 starts to work to provide the heat required for the annealing process.

[0042] Step Four: During the processing, the fan 21 sucks heat into the first heat conduction channel 22 and enters the insertion catheter. Inside the insertion catheter, it passes through the airbag 243, thus first blowing up the airbag 243 to fill the entire insertion hole 25, then entering the insertion hole 25, and finally entering 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. The expansion of the airbag 243 ensures the efficiency and uniformity of heat transfer, ultimately achieving an increase in the bottom furnace temperature and solving the problem of unsatisfactory bottom furnace temperature in the prior art.

[0043] Its effects are as follows: (1) Improving the bottom furnace temperature uniformity: By setting the heat conduction insertion tube 24 and the insertion hole 25, the heat at the furnace cover 12 is effectively transferred to the bottom of the furnace body 11, solving the problem of unsatisfactory bottom furnace temperature in the prior art and improving the quality and mechanical properties of wire spheroidizing annealing.

[0044] (2) Simplifying the operation of covering the furnace cover 12: Although the setting of the heat conduction insertion tube 24 may originally affect the convenience of covering the furnace cover 12, by setting the diameter of the insertion hole 25 to be much larger than that of the heat conduction insertion tube 24, the need for precise positioning is avoided, making the operation of covering the furnace cover 12 more convenient and improving work efficiency.

[0045] (3) Double - seal guarantee: The setting of the centering part 242 on the insertion catheter realizes the axial centering between the furnace cover 12 and the furnace body 11. Also, the first soft seal is achieved through the expansion of the airbag 243, and the second hard seal is formed when the furnace cover 12 is covered on the furnace body 11. This double - seal design ensures the effective transfer and uniform distribution of heat inside the furnace, while preventing heat leakage and improving energy utilization efficiency.

[0046] (4) Precise centering adjustment: The design of the centering part 242 allows for fine adjustment of the position when the furnace cover 12 is not fully covered, ensuring that the heat conduction insertion tube 24 is accurately inserted into the insertion hole 25. This idea of first inserting and then fine - tuning not only ensures the correct connection between the heat conduction insertion tube 24 and the insertion hole 25, but also simplifies the operation process and reduces the failures and maintenance costs caused by inaccurate positioning.

[0047] 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 operation risk, and extends the service life of the equipment. The present invention effectively solves the deficiencies of the existing bell - type spheroidizing annealing furnace in terms of bottom furnace temperature uniformity, convenience of covering the furnace cover 12, and sealing performance, providing a more efficient, reliable, and energy - saving solution for the heat treatment of metal materials such as wires.

[0048] Refer to Figures 3-6, the first heat conduction channels 22 and the second heat conduction channels 23 are in one-to-one correspondence and there are multiple of each. They are annularly and equally spaced in the wall of the annealing furnace body 1. At the same time, there are also multiple heat conduction inserting pipes 24, which are in one-to-one correspondence with the first heat conduction channels 22 and the second heat conduction channels 23. Inside the housing 211 of the fan, multiple cavities 212 are annularly and equally spaced. Each cavity 212 is provided with an air duct 221. The air duct 221 is communicated with an annular channel 222 arranged inside the furnace cover 12. The upper ends of the respective heat conduction inserting pipes 24 are communicated with the annular channel 222. The first heat conduction channels 22 include the respective air ducts 221 and the annular channel 222. There are multiple second heat conduction channels 23, the upper ends of which are communicated with the insertion holes 25, and the lower ends are provided with air outlets 231 at the bottom inside the furnace body 11.

[0049] In this embodiment, the fan rotates to adsorb the heat near the furnace top into the housing 211. The heat enters the air ducts 221 along the respective cavities 212 inside the housing 211, and then converges into the annular channel 222 inside the furnace cover 12. The annular channel 222 evenly distributes the heat into each heat conduction inserting pipe 24. These heat conduction inserting pipes 24 correspond to the first heat conduction channels 22 and the second heat conduction channels 23, ensuring that the heat can be accurately transferred from the furnace cover 12 to the bottom of the furnace body 11, improving the uniformity of the furnace bottom temperature, and thus improving the quality and mechanical properties of the wire spheroidizing annealing.

[0050] Specifically in terms of structure, the first heat conduction channels 22 and the second heat conduction channels 23 are annularly and equally spaced in the wall of the annealing furnace body 1 and the quantities correspond. This layout makes the heat transfer more uniform during the transfer process, avoiding the situation of local overheating or too low temperature. The quantity of the heat conduction inserting pipes 24 also corresponds to them, ensuring that each heat conduction channel can effectively transfer heat and improving the heat transfer efficiency. There are multiple annularly and equally spaced cavities 212 inside the fan housing 211. Each cavity 212 is connected to an air duct 221. The air duct 221 conveys the heat to the annular channel 222 inside the furnace cover 12. The design of the annular channel 222 enables the heat to be evenly distributed into each heat conduction inserting pipe 24, further improving the temperature uniformity. The heat in the annular channel 222 is transferred through the respective heat conduction inserting pipes 24. The upper end of the second heat conduction channel 23 is connected to the insertion hole 25, and the lower end is provided with an air outlet 231 at the bottom of the furnace body 11, enabling the heat to be evenly distributed to the bottom of the furnace body 11, ensuring the stability of the temperature throughout the furnace, reducing energy waste, and improving the annealing efficiency.

[0051] In the present invention, in order to achieve the communication between the first heat conduction channel 22 on the furnace cover 12 and the second heat conduction channel 23 in the furnace body 11, a heat conduction insertion tube 24 and a socket hole 25 are specifically designed as connecting components. However, the introduction of the heat conduction insertion tube 24 may affect the covering operation of the furnace cover 12. Because the traditional furnace cover 12 does not require precise positioning for covering, but now in order to ensure that the heat conduction insertion tube 24 can be accurately inserted into the socket hole 25, precise positioning seems to be required, which undoubtedly increases the complexity of the operation. To solve this problem, we optimized the size of the socket hole 25 and set its diameter much larger than that of the heat conduction insertion tube 24. The advantage of this design is that even if there is a certain positional deviation during the covering process of the furnace cover 12, the heat conduction insertion tube 24 can still be smoothly inserted into the socket hole 25, thus avoiding the strict requirement for precise positioning and making the covering operation of the furnace cover 12 more convenient and efficient.

[0052] However, the increase in the diameter of the socket hole 25 may cause another problem, that is, the sealing performance between the heat conduction insertion tube 24 and the socket hole 25 may be affected. To solve this potential sealing problem, a centering member 242 is added to the insertion conduit. The function of the centering member 242 is to slightly adjust the position of the furnace cover 12 through its own structural design when the furnace cover 12 is not fully covered, ensuring that the heat conduction insertion tube 24 can be accurately aligned and inserted into the socket hole 25. During the actual operation process, when the furnace cover 12 descends, the heat conduction insertion tube 24 is first inserted into the socket hole 25, and then the position of the furnace cover 12 is finely adjusted through the adjustment function of the centering member 242 to achieve more precise centering. After the centering is completed, when in formal use, the airbag 243 expands to fill the entire socket hole 25, thus achieving the first soft seal. This soft seal effectively prevents heat from leaking around the socket 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 fully covered on the furnace body 11, a second hard seal is formed, further enhancing the sealing performance of the entire system. This design concept of double sealing not only ensures the sealing effect between the heat conduction insertion tube 24 and the socket 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 wire rods.

[0053] Refer to Figures 3-6, the centering member 242 includes a plurality of receiving grooves 2421 formed at equal intervals in a ring on the outer wall of the pipe body 241. A pushing plate 2422 is arranged in the receiving groove 2421. One end of the support rod 2423 of each pushing plate 2422 is located at the center of the pipe body 241. A liftable tapered rod 2424 is coaxially arranged in the pipe body 241. Each support rod 2423 is located on the outer wall of the tapered rod 2424, and a first spring 2425 for pushing it back into the pipe body 241 is arranged on the outer wall of each support rod 2423. A ball 2426 is arranged at the bottom of the tapered rod 2424, and a limiting rod 2427 fixed to the inside of the pipe body 241 is arranged on the side of the tapered rod 2424. The heat-conducting insertion tube 24 is inserted into the insertion hole 25. The insertion 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 pipe body 241 and contacts the bottom surface of the insertion hole 25.

[0054] It should be noted that the structure of the centering member 242 is exquisitely designed. A plurality of receiving grooves 2421 are formed at equal intervals in a ring on the outer wall of its pipe body 241. 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 pipe body 241, and a liftable tapered rod 2424 is coaxially arranged here. When the furnace cover 12 slowly descends, the tapered rod 2424 first contacts the bottom of the insertion hole 25 and is squeezed upward. As the tapered rod 2424 rises, it drives the support rods 2423 arranged at equal intervals in a ring around it to move outward against the inward thrust of the first spring 2425. The outward movement of the support rods 2423 further drives the pushing plates 2422 to move out of the receiving grooves 2421 and closely fit the inner wall of the insertion hole 25, realizing the precise 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 design of the ball 2426 at the bottom of the tapered rod 2424 helps to reduce the friction with the bottom surface of the insertion hole 25 and facilitates the adjustment of the position of the furnace cover 12 on the furnace body 11. The limiting rod 2427 fixed to the side limits the lifting of the tapered rod 2424 and supports it at the same time, ensuring the stability and reliability of the centering process.

[0055] Refer to Figures 3-6 , an inclined partition 244 is arranged inside the pipe body 241, which divides the pipe body 241 into upper and lower parts. The airbag 243 surrounds the outer wall of the pipe body 241, and one end of it communicates with the upper half and the other end communicates with the lower half. After the airbag 243 is inflated, it fills the space between the outer wall of the pipe body 241 and the inner wall of the insertion hole 25.

[0056] It should be noted that the interior of the tube body 241 of the heat-conducting insertion tube 24 is divided into upper and lower parts by an inclined partition 244, enabling hot air to flow along a predetermined path. The outer wall of the heat-conducting insertion tube 24 is surrounded by an airbag 243, and its two ends are respectively connected to the upper and lower parts of the tube body 241. After centering is completed, the hot air enters the upper half of the tube body 241 through the first heat-conducting channel 22, then flows into the airbag 243, causing the airbag 243 to expand and fill the space between the outer wall of the tube body 241 and the inner wall of the insertion hole 25 to form a seal. Subsequently, the hot air continues to pass through the airbag 243 into the lower half of the tube body 241 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 insertion part through the expansion of the airbag 243, preventing heat leakage and improving the energy utilization efficiency.

[0057] Referring to Figures 1-6 , a method for using an energy-saving hood-type spheroidizing annealing furnace, comprising the following steps:

[0058] Preparation stage: The elevator 13 drives the furnace cover 12 to rise, opening the furnace body 11. The wire and the material basket are placed into the furnace body 11 through the trolley.

[0059] Lowering and centering of the furnace cover 12: The elevator 13 drives the furnace cover 12 to descend. When the furnace cover 12 descends, the conical rod 2424 first contacts the bottom surface of the insertion hole 25. As the furnace cover 12 continues to slowly descend, the conical rod 2424 is pushed upward, driving the support rods 2423 arranged in an equidistant circular pattern around the periphery to move outward against the inward thrust of the first spring 2425. The outward movement of the support rods 2423 drives the extrusion plate 2422 to move out of the accommodation groove 2421 and fit against the inner wall of the insertion hole 25, achieving precise centering of the furnace cover 12 and the furnace body 11.

[0060] Fully closing the furnace cover 12: After centering is completed, the furnace cover 12 continues to descend until it completely covers the furnace body 11, forming a second hard seal.

[0061] Processing process: Start the fan to adsorb the heat near the furnace top into the housing 211. The heat enters the air duct 221 along the respective cavities 212 in the housing 211 and then converges into the annular channel 222 inside the furnace cover 12. The annular channel 222 evenly distributes the heat to each heat-conducting insertion tube 24. The hot air enters the upper half of the tube body 241 through the first heat-conducting channel 22, then flows into the airbag 243, causing the airbag 243 to expand and fill the space between the outer wall of the tube body 241 and the inner wall of the insertion hole 25 to form a first soft seal. Subsequently, the hot air passes through the airbag 243 into the lower half of the tube body 241 and reaches the bottom of the furnace body 11 through the second heat-conducting channel 23, realizing the effective transfer and uniform distribution of heat.

[0062] Completion of processing: During the processing, the temperature and atmosphere inside the furnace are continuously monitored to ensure the quality of wire spheroidizing annealing. After reaching the predetermined annealing time and temperature, heating and the blower are stopped, and the furnace body 11 is allowed to cool naturally or forced-cooled.

[0063] Taking out of the furnace: After the processing is completed, the elevator 13 drives the furnace cover 12 to rise and opens the furnace body 11. The annealed wire and the material basket are taken out by the trolley for subsequent processing or inspection.

[0064] In the whole working process, through ingenious structural design and optimization of operation steps, effective heat transfer and uniform distribution are achieved, the uniformity of the furnace bottom temperature is improved, and the quality and mechanical properties of wire spheroidizing annealing are improved. At the same time, through the double-seal design and precise adjustment of the centering piece 242, the reliability of the equipment and the energy utilization efficiency are ensured, and the operation difficulty and maintenance cost are reduced.

[0065] Finally, it should be noted that the methods and equipment described in detail above are only examples, and those skilled in the art can modify these examples in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An energy-saving hooded bell-type spheroidizing annealing furnace, characterized in that: including, an annealing furnace body (1), which includes a furnace body (11) and a furnace cover (12) installed on the furnace body (11); a heat conducting component (2), which includes a fan (21) installed on the furnace cover (12), and a first heat conducting channel (22) arranged inside the furnace cover (12) and communicating with the housing (211) of the fan (21). A second heat conducting channel (23) is arranged inside the furnace body (11). A heat conducting insertion tube (24) and an insertion hole (25) are arranged between the furnace cover (12) and the furnace body (11). The heat conducting insertion tube (24) communicates 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); wherein, the first heat conducting channels (22) and the second heat conducting channels (23) are in one-to-one correspondence and are both provided with a plurality of them, which are distributed in an annular and equally spaced manner in the wall of the annealing furnace body (1). At the same time, a plurality of heat conducting insertion tubes (24) are also provided, and they are in one-to-one correspondence with the first heat conducting channels (22) and the second heat conducting channels (23). The heat conducting insertion tube (24) is arranged on the lower surface of the furnace cover (12), and it includes a tube body (241), a centering member (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). The centering member (242) includes a plurality of receiving grooves (2421) opened on the outer wall of the tube body (241) in an annular and equally spaced manner. A pushing plate (2422) is arranged in the receiving groove (2421). One end of the 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). Each support rod (2423) is located on the outer wall of the conical rod (2424), and a first spring (2425) for pushing it back 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 surface of the conical rod (2424). An inclined partition plate (244) is arranged inside the tube body (241), which divides the tube body (241) into upper and lower parts. The air bag (243) surrounds the outer wall of the tube body (241), and one end of it communicates with the upper part and the other end communicates with the lower part.

2. The energy-saving cover well type spheroidizing annealing furnace according to claim 1, characterized in that: The heat conducting insertion tube (24) is inserted into the insertion hole (25). The insertion hole (25) is arranged on the upper surface of the furnace body (11), and the lower end of the conical rod (2424) protrudes from the lower end of the tube body (241) and contacts the bottom surface of the insertion hole (25).

3. The energy-saving well-type spheroidizing annealing furnace according to claim 1, wherein: 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 insertion hole (25).

4. The energy-saving bell-type spheroidizing annealing furnace according to claim 1, characterized in that: Inside the housing (211) of the fan (21), a plurality of cavities (212) are arranged at equal intervals in a ring shape. Each cavity (212) is provided with an air duct (221), and the air duct (221) is communicatively connected to an annular channel (222) inside the furnace cover (12). The upper ends of the respective heat conduction inserting pipes (24) are communicatively connected to the annular channel (222). The first heat conduction channel (22) includes the respective air ducts (221) and the annular channel (222). A plurality of the second heat conduction channels (23) are provided. Their upper ends are communicatively connected to the insertion holes (25), and their lower ends are provided with air outlets (231) at the inner bottom of the furnace body (11).

5. The energy-saving well-type spheroidizing annealing furnace according to claim 1, wherein: The annealing furnace body (1) further includes a lift (13) provided on the side of the furnace body (11) for separating or closing the furnace cover (12) and the furnace body (11). A heating element (14) is provided on the inner wall of the furnace body (11).

6. A method for using an energy-saving well-type spheroidizing annealing furnace, characterized in that: It includes the energy-saving cover well type spheroidizing annealing furnace according to any one of claims 1 to 5, and includes the following steps: The lift drives the furnace cover to rise to open the furnace body, and then the wire rod and the material basket are put into the furnace body together by the trolley. Subsequently, the lift drives the furnace cover to descend. When the furnace cover descends, its conical rod first contacts the bottom surface of the insertion hole, and as the furnace cover continues to slowly descend, the respective push plates are synchronously pushed out, so as to perform a centering operation in the insertion hole. At the same time, the insertion ducts at each position operate simultaneously to achieve the axial centering between the furnace cover and the furnace body. When the furnace cover is completely closed, formal processing is carried out. During the processing, the fan inhales heat into the first heat conduction channel and enters the insertion duct. Inside the insertion duct, it passes through the airbag, so as to first blow the airbag to expand and fill the entire insertion hole, then enter the insertion hole, and finally enter the bottom of the furnace body along the second heat conduction channel until the processing is completed.

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