Multi-tube high-temperature horizontal intermediate frequency induction heating furnace and accessories thereof

Abstract

The present application relates to metal bar processing technical field, specifically to a kind of multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories, multi-tube high-temperature horizontal medium-frequency induction heating furnace is fed using its accessories;The accessory includes a base, the base has two chains, a plurality of chain plates are connected between the two chains, each chain plate has a clamping hook, and a plurality of arc-shaped scrapers are provided on each clamping hook;Each clamping hook is connected by sliding assembly, rotating assembly and chain plate, under the action of sliding assembly, clamping hook can slide, and have corresponding first position and second position before and after sliding, when in first position, clamping hook is away from chain plate, and installation area is formed between them, when in second position, clamping hook is close to chain plate, clamping hook is used to clamp metal bar, arc-shaped scraper is wrapped on metal bar, under the action of rotating assembly, metal bar rotates around its own axis, so that the impurities adhered to the surface of metal bar can be scraped off by arc-shaped scraper.

Description

Technical Field

[0001] The present invention relates to the technical field of metal bar processing equipment, in particular to a multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories. Background Art

[0002] A medium-frequency induction heating furnace is a highly efficient and energy-saving device that uses the principle of electromagnetic induction to heat metals. It occupies an important position in the modern industrial field. Its core application scenarios cover key process links such as forging, heat treatment, smelting, and welding of metal bars. Its working principle is essentially to convert industrial frequency alternating current into medium-frequency alternating current in the frequency range of 300Hz to 20kHz, and to construct an alternating magnetic field through an induction coil to generate eddy current effects inside the metal bar workpiece, thereby achieving the purpose of rapid heating.

[0003] In related technologies, Chinese patent CN114688870B discloses an induction heating furnace, which sets corresponding gaps between heating coil turns according to different high-temperature production processes. On the premise that the furnace temperature meets the requirements of the high-temperature production process, it reduces local excessive burning of the heating element and extends the service life of the heating element.

[0004] However, there are some problems with existing metal bars when they are heated in a medium frequency induction heating furnace: before entering the heating process, the metal bars generally lack a systematic pre-treatment and cleaning process, which leads to impurities such as oxide scale, oil, dust, etc. attached to the surface of the metal bars. During the heating process, they are easily oxidized and fall off due to the high temperature and deposited inside the medium frequency induction heating furnace. On the one hand, this impurity deposition phenomenon will interfere with the uniform distribution of the temperature field in the medium frequency induction heating furnace and affect the heating effect; on the other hand, the accumulation of impurities will accelerate the corrosion loss of refractory materials in the medium frequency induction heating furnace, thereby increasing the operation and maintenance costs and downtime losses of industrial production. Summary of the Invention

[0005] Based on this, it is necessary to provide a multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories to address the problems of poor heating effect and impact on equipment operation reliability in the current metal bar heating process.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An accessory for a multi-tube high-temperature horizontal medium-frequency induction heating furnace, the accessory comprising a machine base, two chains arranged parallel and horizontally on the machine base, each of the chains forming a closed conveying loop; a plurality of chain plates are commonly connected between the two chains, the plurality of chain plates form a ring structure, and adjacent chain plates are hingedly connected; each of the chain plates is provided with a clamping hook, the clamping hook is a strip structure, and is parallel to the metal bar, the clamping hooks on adjacent chain plates are staggered along the inside and outside, and are in the same direction; each of the clamping hooks is provided with a plurality of arc-shaped scrapers, the plurality of arc-shaped scrapers are arranged at intervals along the extension direction of the clamping hook, and are fixedly connected, and can slide in a direction perpendicular to the chain plate, the arc The opening of the scraper faces the chain plate; each of the clamping hooks is connected to the chain plate through a sliding assembly, a rotating assembly and the chain plate. Under the action of the sliding assembly, the clamping hook can slide in a direction perpendicular to the chain plate, and has a corresponding first position and second position before and after sliding. When in the first position, the clamping hook is set away from the chain plate, and an installation area for placing the metal bar is formed between the two. When in the second position, the clamping hook is set close to the chain plate. The clamping hook is configured to clamp the metal bar, and the arc-shaped scraper is wrapped around the metal bar. Under the action of the rotating assembly, the metal bar can rotate around its own axis to scrape off impurities adhered to the surface of the metal bar through the arc-shaped scraper.

[0008] Furthermore, the sliding assembly includes a first ring groove and a second ring groove, the first ring groove is arranged on the machine base, and there are two of them, which are symmetrically arranged; the second ring groove is arranged on the machine base, and is located on the inner side of the first ring groove, and there are two of them, which are symmetrically arranged; each of the clamping hooks is provided with sliding rods on both sides along the length direction, and the two sliding rods on the same clamping hook located on the outer side of the chain plate are respectively slidably inserted into the two first ring grooves, and the two sliding rods on the same clamping hook located on the inner side of the chain plate are respectively slidably inserted into the two second ring grooves.

[0009] Furthermore, the slide bar is capable of rotating around its own axis; the rotating assembly includes a first ring rack and a second ring rack, the first ring rack is arranged on the machine base, and there are two of them, and they coincide with the trajectory of the first ring groove; the second ring rack is arranged on the machine base, and there are two of them, and they coincide with the trajectory of the second ring groove; each of the slide bars is fixedly sleeved with a first gear and a second gear, the first gears on the two slide bars on the same clamping hook on the outer side of the chain plate are respectively meshed with the two first ring racks, and the first gears on the two slide bars on the same clamping hook on the inner side of the chain plate are respectively meshed with the two second ring racks; each of the clamping hooks is provided with rotating teeth on both sides along the length direction. A movable rod, each of the rotating rods is fixedly sleeved with a third gear, and the third gear is meshed with the second gear; a transmission roller is arranged in parallel on each of the clamping hooks, and the transmission roller can elastically slide in a direction perpendicular to the chain plate, and can rotate around its own axis, and can frictionally transmit with the rotating rod, and the transmission roller can also form a stop fit with the chain plate; all the transmission rollers located on the outside of the chain plate are simultaneously sleeved with a first friction belt, and the first friction belt can simultaneously form friction transmission with the transmission roller and the metal bar; all the transmission rollers located on the inside of the chain plate are simultaneously sleeved with a second friction belt, and the second friction belt can simultaneously form friction transmission with the transmission roller and the metal bar.

[0010] Furthermore, the arc-shaped scraper blades are arranged at an angle; the multiple arc-shaped scrapers on the same clamping hook are divided into two groups, and the two groups of arc-shaped scrapers are arranged symmetrically.

[0011] Furthermore, the radius of the arc-shaped scraper is equal to the radius of the metal bar; when the clamping hook is in the second position, the arc-shaped scraper and the furnace mouth of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are coaxially arranged.

[0012] Furthermore, the radius of the hook end of the clamping hook is greater than the radius of the metal bar.

[0013] Furthermore, the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace also include two stepped loaders, which are configured to respectively transfer the metal bars to the installation areas on both sides of the chain plate located at the lower layer.

[0014] Furthermore, the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace also include a pusher, which is configured to push the metal bars on both sides of the chain plate located on the upper layer toward the multi-tube high-temperature horizontal medium-frequency induction heating furnace.

[0015] The present invention also provides a multi-tube high-temperature horizontal medium-frequency induction heating furnace, which uses an accessory of the multi-tube high-temperature horizontal medium-frequency induction heating furnace for loading. The multi-tube high-temperature horizontal medium-frequency induction heating furnace includes a furnace body, which is provided with two rows of furnace openings, and the furnace openings in different rows are staggered.

[0016] Furthermore, the furnace body is a two-section structure, and the furnace body on the side close to the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace is configured to preheat the metal bars; the furnace body on the side away from the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace is configured to heat the metal bars.

[0017] The beneficial effects of the present invention are:

[0018] The present invention relates to a multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories. The multi-tube high-temperature horizontal medium-frequency induction heating furnace adopts the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace for loading; the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are provided with a clamping hook and an arc-shaped scraper, and a sliding component and a rotating component matched therewith. When loading, under the action of the sliding component, the clamping hook is in a first position and is away from the chain plate. An installation area for placing metal bars is formed between the clamping hook and the chain plate, ensuring that the metal bars can enter the inner side of the clamping hook stably and with less resistance; when transporting materials, under the action of the sliding component, the clamping hook is in a second position and the clamping hook is close to the chain plate. Close to the chain plate and clamping the metal bar to ensure that the metal bar has a certain position to avoid affecting the subsequent furnace entry process. The arc scraper is wrapped on the metal bar. At the same time, under the action of the rotating assembly, the metal bar rotates around its own axis, so that the impurities adhering to the surface of the metal bar can be scraped off by the arc scraper to achieve the cleaning of the metal bar before entering the multi-tube high-temperature horizontal medium-frequency induction heating furnace, which is beneficial to reduce the deposition of impurities in the furnace. On the one hand, it is beneficial to reduce the interference with the uniform distribution of the temperature field in the furnace and ensure the heating effect of the metal bar. On the other hand, it is beneficial to reduce the corrosion loss of refractory materials in the furnace and ensure that the operation and maintenance costs of industrial production will not be too high.

[0019] Furthermore, by setting the arc scraper to extend obliquely, and the multiple arc scrapers on the same clamping hook are divided into two groups, the two groups of arc scrapers are symmetrically arranged. When transporting materials, on the one hand, impurities can be moved to the middle or both ends of the metal bar and piled up under the guidance of the arc scraper, which is conducive to reducing the trouble of cleaning impurities. On the other hand, the metal bar can ensure that its own middle and the middle of the two groups of arc scrapers are aligned under the guidance of the arc scraper, which not only avoids the situation where the metal bars are randomly distributed on the chain plate and cause uneven wear of the chain plate, but also ensures that all metal bars can enter the furnace at the same time during subsequent loading, avoiding the metal bars that enter the furnace first being heated for too long, causing waste, and the metal bars that enter the furnace later being heated for too short a time, affecting the subsequent processing process.

[0020] Furthermore, by setting the radius of the arc scraper to be equal to the radius of the metal rod, and when the clamping hook is in the second position, the arc scraper and the furnace mouth of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are coaxially arranged, thereby enabling the clamping and centering of the metal rod to be achieved, while ensuring the coaxiality between the metal rod and the furnace mouth, it is beneficial to improve the uniformity of the subsequent heating of the metal rod.

[0021] Furthermore, by setting the radius of the hook end of the clamping hook to be larger than the radius of the metal bar, it can be further ensured that the metal bar enters the inner side of the clamping hook stably and with less resistance during loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories during assembly provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional view of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided by an embodiment of the present invention, without the pusher and the stepped loader;

[0026] Figure 5 A schematic cross-sectional view of the accessories of a multi-tube high-temperature horizontal medium-frequency induction heating furnace without the pusher and the stepped loader provided in an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the three-dimensional structure of the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided by an embodiment of the present invention, without the pusher, stepped loader, and machine base;

[0028] Figure 7 A schematic diagram of the three-dimensional structure of the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided by an embodiment of the present invention, without the pusher, stepped loader, machine base, first friction belt and second friction belt;

[0029] Figure 8 A schematic diagram of a three-dimensional structure of a partial structure of an accessory of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention Figure 1 ;

[0030] Figure 9 A schematic diagram of the exploded structure of the accessories of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention;

[0031] Figure 10 A schematic diagram of a three-dimensional structure of a partial structure of an accessory of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention Figure 2 ;

[0032] Figure 11 A schematic side view of a portion of the structure of an accessory of a multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention;

[0033] Figure 12 for Figure 11 Middle AA section view;

[0034] Figure 13 for Figure 12 Schematic diagram of the locally enlarged structure at Z in the middle.

[0035] in:

[0036] 1. Machine base; 101. First chute; 102. Second chute; 2. Chain; 201. Chain link; 3. Chain plate; 4. Clamping hook; 401. Hook end; 402. Vertical section; 403. Third chute; 5. Curved scraper; 501. Vertical rod; 502. Crossbar; 601. First ring groove; 602. Second ring groove; 603. Sliding rod; 701. First ring rack; 702. Second ring rack; 703. First gear; 7 04. Second gear; 705. Rotating rod; 706. Third gear; 707. Drive roller; 7071. Slider; 7072. Compression spring; 708. First friction belt; 709. Second friction belt; 8. Step loader; 9. Pusher; 10. Furnace body; 1001. Furnace mouth; 11. Sprocket; 12. First drive motor; 13. Second drive motor; 14. First rotary wheel; 15. Second rotary wheel; 16. Metal bar. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0039] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0040] Refer to the following Figures 1 to 13 The multi-tube high-temperature horizontal medium-frequency induction heating furnace and its accessories provided in an embodiment of the present invention are described. It is particularly suitable for heating tungsten and molybdenum rods. Of course, it is also suitable for heating other metal rods 16.

[0041] The existing general tungsten-molybdenum rod online rolling heating furnace is a single-tube heating furnace, which can only hold 1 to 3 metal bars 16 at a time. The production efficiency is low and cannot meet the heating requirements of large quantities of metal bars 16 before rolling.

[0042] Based on this, in the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention, it is configured to include a furnace body 10, an induction coil, a heat-insulating material, a heating element, a lifting mechanism, a translation mechanism, a pushing mechanism and a loading mechanism, wherein the furnace body 10 is a horizontal square structure and can be made of an insulating material, epoxy bakelite, to prevent the furnace body 10 from being inductively heated during the induction heating process; two rows of furnace openings 1001 are opened through the front side wall of the furnace body 10, and each furnace opening 1001 can simultaneously process one or more metal bars 16 with overlapping axes, thereby improving the heating production efficiency of the metal bars 16; the two rows of furnace openings 1001 are arranged at intervals in the vertical direction, the furnace openings 1001 in the same row are arranged horizontally at equal intervals in the left-right direction, and the furnace openings 1001 in different rows are staggered, so that the spacing between the two rows of furnace openings 1001 in the vertical direction can be reduced, thereby reducing the volume of the furnace body 10, while improving space utilization, it is beneficial to reduce the manufacturing cost of the multi-tube high-temperature horizontal medium-frequency induction heating furnace. The multi-tube high-temperature horizontal medium-frequency induction heating furnace uses accessories for loading. For example, each row can be provided with five furnace openings 1001, with the leftmost furnace opening 1001 in the second row positioned to the right of the leftmost furnace opening 1001 in the first row. This allows for the continuous loading and unloading of ten metal bars 16 at a time, improving the continuity of production rhythm and enabling the entire production line to meet mass production requirements.

[0043] The induction coil is wound from T2 rectangular copper tube and undergoes an overall insulation coating process, including baking, wrapping, and painting, to enhance its insulation strength. It is secured with Bakelite columns to extend its service life. The insulation material utilizes heavy-duty zirconia bricks for the inner layer and hollow alumina sphere bricks for the outer layer. This rationally designed structure ensures excellent high-temperature structural strength, thermal stability, and chemical stability, enabling operation at temperatures up to 2000°C and under full load. The insulation and induction coil design ensure thermal field stability and excellent electrical and thermal efficiency, ensuring safe operation and energy conservation. The heating element, constructed from a solid tungsten block, features ten holes for inserting metal rods (16) for heating and insulation. Once heated to temperature, the rods are pushed out of the heating element for rolling, while a cold rod (16) is simultaneously introduced to continue heating. This sequential feeding and discharging process ensures continuous operation. The lifting mechanism is used to lift the positions of the two rows of furnace openings 1001; the translation mechanism and the lifting mechanism are used in conjunction with each other to ensure that the metal bars 16 are aligned with the furnace openings 1001 when entering and exiting; the pushing mechanism can quickly push the heated metal bars 16 out of the furnace body 10. In order to prevent other materials from being melted after passing through the high-temperature zone of the heating furnace, the pushing structure can be made of tungsten or molybdenum; the loading mechanism is used to automatically feed each metal bar 16 into the furnace opening 1001, thereby realizing automatic loading and pushing. The bottom of the furnace body 10 is equipped with a lifting and translation function, which makes the entire equipment easy to operate, has a low failure rate, saves operator costs, and can greatly improve production efficiency.

[0044] The above structure increases the heating furnace temperature from 1400-1600°C to 1900-2000°C, meeting the required tungsten rod rolling temperature. Furthermore, the system can simultaneously heat up to 10 rods, up from 1-3 at a time. This multi-tube heating furnace approach enables continuous production, improves production efficiency, and reduces labor costs.

[0045] It is understandable that a hydrogen protection system is also provided in the multi-tube high-temperature horizontal medium-frequency induction heating furnace: the hydrogen protection system with upper and lower air intake can effectively ensure the safety of the heating furnace during use, and protect the tungsten heating element from oxidation during material loading and unloading.

[0046] In the current single-tube heating furnace, when heating the metal bar 16, there is usually a lack of a systematic pre-treatment cleaning process before the metal bar 16 enters the furnace body 10. Impurities such as oxide scale, oil stains, and dust are often attached to its surface. During the heating process, these impurities are easily oxidized and fall off due to the high temperature, and are deposited inside the furnace body 10, resulting in the heat capacity of the deposited area being different from that of the surrounding furnace body 10 material, which in turn causes the temperature rise or fall rate of the deposited area to be different from that of other areas, thereby interfering with the uniform distribution of the temperature field, causing the metal bar 16 to be heated unevenly in different parts during the heating process, seriously affecting the heating effect, and may also cause the mechanical properties of the metal bar 16 to be inconsistent, and unable to meet production requirements. At the same time, oil stains will decompose at high temperatures to produce corrosive gases and liquids. These corrosive substances, combined with the chemical components in the dust, will have a continuous erosion effect on the refractory materials. Over time, the surface of the refractory materials will gradually be corroded and lost, and cracks and peeling will appear. The loss of refractory materials will not only reduce the thermal insulation performance of the heating furnace and increase energy consumption, but may also cause malfunctions in the multi-tube high-temperature horizontal medium-frequency induction heating furnace, requiring frequent maintenance and replacement, which will undoubtedly increase the operation and maintenance costs of industrial production. In addition, when the multi-tube high-temperature horizontal medium-frequency induction heating furnace is shut down for maintenance, the production process will be interrupted, resulting in downtime losses, affecting production efficiency and product output.

[0047] Based on this, the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in an embodiment of the present invention are configured to include a machine base 1, which is a box structure with an open top and is located on the front side of the furnace body 10. Two chains 2 are arranged horizontally and horizontally on the base 1. The chains 2 are arranged horizontally in the left-right direction as a whole, and the two chains 2 are arranged at intervals in the front-to-back direction. Each chain 2 includes a plurality of chain links 201. The multiple chain links 201 of the same chain 2 form a ring structure, and adjacent chain links 201 are hingedly connected. Two sprockets 11 are provided on the base 1. The two sprockets 11 are arranged horizontally in the left-to-right direction and at intervals. The axes of the sprockets 11 extend horizontally in the front-to-back direction. The sprockets 11 can rotate around their own axes. The sprocket 11 on the left forms a transmission cooperation with the left ends of the two chains 2, and the sprocket 11 on the right forms a transmission cooperation with the right ends of the two chains 2. A first drive motor 12 is also provided on the base 1. The first drive motor 12 is mounted on the front side wall of the base 1. The motor shaft of the first drive motor 12 is arranged horizontally and rearward. When installed, it is coaxial and fixedly inserted into the sprocket 11 on the right, ensuring that both chains 2 can form a closed conveying loop.

[0048] There are multiple chain plates 3 connected between the two chains 2. The multiple chain plates 3 form an annular structure, which coincides with the annular structure formed by multiple links 201 of the same chain 2. Adjacent chain plates 3 are hingedly connected, and the hinge points between adjacent chain plates 3 coincide with the hinge points between adjacent links 201, and are connected through the same hinge shaft, thereby ensuring that the chain plates 3 can synchronously follow the movement of the links 201. Each chain plate 3 is provided with a clamping hook 4, which is a J-shaped strip structure and has a hook end 401 and two vertical sections 402. The two vertical sections 402 are respectively arranged on both sides of the hook end 401 along its own length direction. When the clamping hook 4 is installed, the vertical section 402 is inserted into the chain plate 3, and the clamping hook 4 extends horizontally in the front-to-back direction. The clamping hooks 4 on adjacent chain plates 3 are staggered inside and outside to ensure consistency with the layout of the furnace mouth 1001, so as to facilitate the transportation of metal bars 16 to the furnace mouth 1001, and the hook ends 401 of the clamping hooks 4 on the upper chain plate 3 are all set to the right, and the hook ends 401 of the clamping hooks 4 on the lower chain plate 3 are all set to the left.

[0049] A plurality of arc-shaped scrapers 5 are provided on the inner side of the hook end 401 of each clamping hook 4. The plurality of arc-shaped scrapers 5 on the same clamping hook 4 are arranged horizontally at equal intervals in the front-to-back direction, and a vertical rod 501 is fixedly provided on the outer arc surface of each arc-shaped scraper 5. The vertical rod 501 extends in the up-down direction and passes through the clamping hook 4. The ends of the vertical rods 501 on the plurality of arc-shaped scrapers 5 on the same clamping hook 4 are commonly connected with a cross bar 502, thereby fixing the plurality of arc-shaped scrapers 5 on the same clamping hook 4 together. The cross bar 502 extends horizontally in the front-to-back direction and is located on the outside of the hook end 401 of the clamping hook 4; the opening of the arc-shaped scraper 5 faces the chain plate 3, ensuring that it can be wrapped in the metal in the subsequent process The plurality of arc scrapers 5 on the same clamping hook 4 can slide in a direction perpendicular to the chain plate 3, so as to facilitate adjustment of the relative position with the metal bar 16. When loading, the plurality of arc scrapers 5 on the same clamping hook 4 are set away from the metal bar 16 to avoid affecting the loading. When transporting, the plurality of arc scrapers 5 on the same clamping hook 4 are close to and wrapped around the metal bar 16. While limiting the metal bar 16, the plurality of arc scrapers 5 on the same clamping hook 4 can be cleaned of impurities adhering to the surface of the metal bar 16 by relative rotation with the metal bar 16.

[0050] Each clamping hook 4 is connected by a sliding assembly, a rotating assembly and a chain plate 3. Under the action of the sliding assembly, the clamping hook 4 can slide in a direction perpendicular to the chain plate 3, and has a corresponding first position and a second position before and after sliding. When loading, the clamping hook 4 on the lower chain plate 3 is in the first position, the clamping hook 4 is set away from the chain plate 3, and an installation area for placing the metal bar 16 is formed between the two, ensuring that the metal bar 16 can enter the inner side of the clamping hook 4 stably and with less resistance; when transporting, the clamping hook 4 on the upper chain plate 3 is in the second position The clamping hook 4 is arranged close to the chain plate 3, and the clamping hook 4 is configured to clamp the metal bar 16. The arc scraper 5 is wrapped around the metal bar 16. Under the action of the rotating assembly, the metal bar 16 can rotate around its own axis to scrape off impurities adhering to the surface of the metal bar 16 through the arc scraper 5, which is beneficial to reduce the deposition of impurities in the furnace. On the one hand, it is beneficial to reduce the interference with the uniform distribution of the temperature field in the furnace and ensure the heating effect of the metal bar 16. On the other hand, it is beneficial to reduce the corrosion loss of refractory materials in the furnace and ensure that the operation and maintenance costs of industrial production will not be too high.

[0051] It should be noted that when the clamping hook 4 is located on the lower chain plate 3 and is located on the upper side of the chain plate 3, the multiple arc-shaped scrapers 5 on the same clamping hook 4 will move downward under the action of their own weight, but since the clamping hook 4 is away from the metal bar 16, the multiple arc-shaped scrapers 5 on the same clamping hook 4 are also away from the metal bar 16, thereby avoiding affecting the loading; when the clamping hook 4 is located on the lower chain plate 3 and is located on the lower side of the chain plate 3, the multiple arc-shaped scrapers 5 on the same clamping hook 4 will move downward under the action of their own weight. At this time, since the clamping hook 4 is away from the metal bar 16, the multiple arc-shaped scrapers 5 on the same clamping hook 4 are also away from the metal bar 16, thereby avoiding affecting the loading.

[0052] It should also be noted that in order to ensure that when the clamping hook 4 is located on the upper chain plate 3, the multiple arc-shaped scrapers 5 on the same clamping hook 4 can always be wrapped around the metal bar 16, so as to avoid the influence of gravity or other external forces, which may affect the cleaning effect on the surface of the metal plate, two first slide grooves 101 and two second slide grooves 102 are provided on the machine base 1. The two first slide grooves 101 are symmetrically arranged on the front and rear inner walls of the machine base 1. The first slide groove 101 extends horizontally in the left and right directions. The first slide groove 101 is a U-shaped structure with an opening facing upward and is located above the upper chain plate 3. When the clamping hook 4 is located on the upper chain plate 3 and on the upper side of the chain plate 3, the two ends of the cross bar 502 on the multiple arc-shaped scrapers 5 on the same clamping hook 4 are slidably inserted into the two In the first slide groove 101, it is ensured that under the guidance of the first slide groove 101, the multiple arc scrapers 5 on the same clamping hook 4 can always be wrapped around the metal bar 16; the two second slide grooves 102 are symmetrically arranged on the front and rear inner walls of the machine base 1, and the second slide groove 102 extends horizontally in the left and right directions. The second slide groove 102 is a U-shaped structure with an opening facing downward and is located between the upper chain plate 3 and the lower chain plate 3. When the clamping hook 4 is located on the upper chain plate 3 and on the lower side of the chain plate 3, the two ends of the cross bar 502 on the multiple arc scrapers 5 on the same clamping hook 4 are respectively slidably inserted into the two second slide grooves 102, ensuring that under the guidance of the second slide groove 102, the multiple arc scrapers 5 on the same clamping hook 4 can always be wrapped around the metal bar 16.

[0053] Specifically, the sliding assembly is configured to include a first annular groove 601 and a second annular groove 602. There are two first annular grooves 601, which are respectively arranged on the front and rear outer side walls of the machine base 1 and both extend horizontally in the left and right directions as a whole. The trajectory of the first annular groove 601 is similar to the trajectory of the chain 2 and is located on the outside of the chain 2; the two second annular grooves 602 are respectively arranged on the front and rear outer side walls of the machine base 1 and both extend horizontally in the left and right directions as a whole. The trajectory of the second annular groove 602 is similar to the trajectory of the chain 2 and is located on the inside of the chain 2; each clamping hook 4 is provided with a sliding rod 603 on both side walls along the front and rear directions, and the sliding rod 603 extends horizontally in the front and rear directions, wherein the two sliding rods 603 on the same clamping hook 4 located on the outside of the chain plate 3 are slidably inserted into the two first annular grooves 601 respectively, With the support of the first annular groove 601, the clamping hook 4 has a determined position. Under the guidance of the first annular groove 601, when the same clamping hook 4 located on the outside of the chain plate 3 moves to the upper layer, it can approach the chain plate 3 and clamp the metal bar 16. When the same clamping hook 4 located on the outside of the chain plate 3 moves to the lower layer, it can move away from the chain plate 3 to avoid affecting the loading; the two sliding rods 603 on the same clamping hook 4 located on the inside of the chain plate 3 are slidably inserted into the two second annular grooves 602 respectively. With the support of the second annular groove 602, the clamping hook 4 has a determined position. Under the guidance of the second annular groove 602, when the same clamping hook 4 located on the inside of the chain plate 3 moves to the upper layer, it can approach the chain plate 3 and clamp the metal bar 16. When the same clamping hook 4 located on the inside of the chain plate 3 moves to the lower layer, it can move away from the chain plate 3 to avoid affecting the loading.

[0054] The horizontal section of the first annular groove 601 located on the upper side is arranged lower than the horizontal section of the same chain 2 located on the upper side, so that when the two sliding rods 603 on the same clamping hook 4 located on the outer side of the chain plate 3 slide to the horizontal section of the first annular groove 601 located on the upper side, under the guidance of the horizontal section, the clamping hook 4 located on the outer side of the chain plate 3 can approach the chain plate 3 and clamp the metal bar 16; the horizontal section of the first annular groove 601 located on the lower side is arranged lower than the horizontal section of the same chain 2 located on the upper side, so that when the two sliding rods 603 on the same clamping hook 4 located on the outer side of the chain plate 3 slide to the horizontal section of the first annular groove 601 located on the lower side, under the guidance of the horizontal section, the clamping hook 4 located on the outer side of the chain plate 3 can move away from the chain plate 3 to avoid affecting the loading; The horizontal section of the second ring groove 602 on the upper side is arranged higher than the horizontal section of the same chain 2 on the upper side, so that when the two sliding rods 603 on the same clamping hook 4 on the outside of the chain plate 3 slide to the horizontal section of the second ring groove 602 on the upper side, under the guidance of the horizontal section, the clamping hook 4 on the outside of the chain plate 3 can approach the chain plate 3 and clamp the metal bar 16; the horizontal section of the second ring groove 602 on the lower side is arranged higher than the horizontal section of the same chain 2 on the upper side, so that when the two sliding rods 603 on the same clamping hook 4 on the outside of the chain plate 3 slide to the horizontal section of the second ring groove 602 on the lower side, under the guidance of the horizontal section, the clamping hook 4 on the outside of the chain plate 3 can stay away from the chain plate 3 to avoid affecting the loading.

[0055] Specifically, the slide bar 603 can rotate around its own axis; the rotating assembly is configured to include a first ring rack 701 and a second ring rack 702, there are two first ring racks 701, which are respectively arranged on the front and rear outer walls of the machine base 1, and are both horizontally extended in the left and right directions as a whole, the trajectory of the first ring rack 701 coincides with the trajectory of the first ring groove 601, and the tooth surface is inward; there are two second ring racks 702, which are respectively arranged on the front and rear outer walls of the machine base 1, and are both horizontally extended in the left and right directions as a whole, the trajectory of the second ring teeth coincides with the trajectory of the second ring groove 602, and the tooth surface is outward; each slide bar 603 is fixedly sleeved with a first gear 703 and a second gear 704, which are located on the same clamping hook 4 on the outside of the chain plate 3 The first gears 703 on the two slide bars 603 are respectively engaged with the two first ring racks 701, and the first gears 703 on the two slide bars 603 on the same clamping hook 4 on the inner side of the chain plate 3 are respectively engaged with the two second ring racks 702. When the chain plate 3 moves following the chain 2, under the engagement of the first ring rack 701 and the first gear 703, the two slide bars 603 on the same clamping hook 4 on the outer side of the chain plate 3 can both rotate around their own axes, thereby driving the second gears 704 thereon to rotate. At the same time, under the engagement of the second ring rack 702 and the first gear 703, the two slide bars 603 on the same clamping hook 4 on the inner side of the chain plate 3 can both rotate around their own axes, thereby driving the second gears 704 thereon to rotate.

[0056] Each clamping hook 4 is provided with a rotating rod 705 on both side walls along the front-back direction. The rotating rod 705 extends horizontally along the front-back direction. Each rotating rod 705 is fixedly sleeved with a third gear 706. The third gear 706 meshes with the second gear 704. When the chain plate 3 moves following the chain 2, the third gear 706 can drive the rotating rod 705 to rotate around its own axis through the meshing between the third gear 706 and the second gear 704. Each clamping hook 4 is provided with a transmission roller 707 in parallel. Square sliders 7071 are rotatably provided at both ends of the transmission roller 707. Square third sliding grooves 403 are provided in parallel on the inner side walls of the vertical section 402. When the transmission roller 707 is installed, the two sliders 7071 are respectively slidably inserted into the two third sliding grooves 403. Under the geometric structure restriction of the square, the transmission roller 707 can slide in a direction perpendicular to the chain plate 3. At the same time, the transmission roller 707 can rotate around its own axis. A compression spring 70 is inserted in each third sliding groove 403. 72. The compression spring 7072 is connected between the slider 7071 and the clamping hook 4. Under the action of the compression spring 7072, the transmission roller 707 has a tendency to move toward the direction close to the chain plate 3. When the clamping hook 4 moves on the upper layer, under the guidance of the first annular groove 601 or the second annular groove 602, the clamping hook 4 moves toward the direction close to the chain plate 3, and synchronously drives the rotating rod 705 to move toward the direction close to the transmission roller 707, so that the rotating rod 705 and the transmission roller 707 are in friction contact, and then the rotating rod 705 can drive the transmission roller 707 to rotate around its own axis.

[0057] All the transmission rollers 707 located on the outside of the chain plate 3 are simultaneously sleeved with a first friction belt 708. The first friction belt 708 is an annular structure. When the clamping hook 4 moves on the upper layer, the clamping hook 4 moves toward the direction close to the chain plate 3. On the one hand, the metal bar 16 is pressed against the first friction belt 708, so that the metal bar 16 and the first friction belt 708 are in friction contact. On the other hand, it drives the rotating rod 705 to move toward the direction close to the transmission roller 707, and synchronously compresses the compression spring 7072. Under the action of the compression spring 7072, the transmission roller 707 rubs against the first friction belt 708, so that the rotation of the transmission roller 707 can drive the first friction belt 708 to rotate, and then drive the metal bar 16 to rotate, which facilitates the cleaning of impurities adhering to the surface of the metal bar 16 through relative rotation with the arc scraper 5. All the transmission rollers 707 located on the inner side of the chain plate 3 are simultaneously sleeved with a second friction belt 709, which is a ring structure. When the clamping hook 4 moves on the upper layer, the clamping hook 4 moves toward the direction close to the chain plate 3. On the one hand, the metal bar 16 is pressed against the second friction belt 709, so that the metal bar 16 and the second friction belt 709 are in friction contact. On the other hand, it drives the rotating rod 705 to move toward the direction close to the transmission roller 707, and synchronously compresses the compression spring 7072. Under the action of the compression spring 7072, the transmission roller 707 rubs against the second friction belt 709, so that the rotation of the transmission roller 707 can drive the second friction belt 709 to rotate, and then drive the metal bar 16 to rotate, which facilitates the cleaning of impurities adhering to the surface of the metal bar 16 through relative rotation with the arc scraper 5.

[0058] Thus, through the linkage cooperation of the sliding component and the rotating component, the impurities adhering to the surface of the metal bar 16 can be automatically cleaned.

[0059] In a further embodiment, in order to achieve both centralized collection of impurities and automatic centering of the metal bar 16, the arc scraper 5 is set at an angle; the multiple arc scrapers 5 on the same clamping hook 4 are divided into two groups, and the two groups of arc scrapers 5 are symmetrically set.

[0060] Specifically in this embodiment, the arc-shaped scraper blades 5 located on the rear side can be arranged to tilt from left to right and from back to front; the arc-shaped scraper blades 5 located on the front side are correspondingly arranged to tilt from left to right and from back to front. The two sets of arc-shaped scraper blades 5 form an eight-shaped structure, with the small mouth of the eight-shaped structure facing right. When the metal bar 16 moves on the chain plate 3, impurities such as oxide scale and dust attached to the surface fall off due to vibration or friction, and contact the arc-shaped scraper blades 5 under the action of gravity and inertia. The tilt angles of the two sets of arc-shaped scraper blades 5 form a component force directed toward the middle of the metal bar 16, so that the impurity particles are forced to change their trajectory when contacting the surface of the arc-shaped scraper blades 5. That is, they gather toward the middle of the metal bar 16 along the tangent direction of the arc-shaped scraper blade 5 and the composite path of the tilted component force, thereby accumulating in a specific area of ​​the metal bar 16 to form a concentrated body that is easy to clean, effectively solving the problem of equipment contamination and cleaning efficiency caused by scattered impurities. At the same time, when the metal bar 16 deviates on the chain plate 3, the number of contacts between it and the two groups of arc-shaped scrapers 5 changes. Since the normal force of the inclined surface of the arc-shaped scraper 5 has a horizontal component, this component will produce a lateral thrust on the metal bar 16. Among them, the group of arc-shaped scrapers 5 with a larger number of contacts produces a greater resultant force on the metal bar 16 toward the middle of the cross bar 502, thereby forcing the metal bar 16 to move toward the middle of the cross bar 502, thereby ensuring that the middle of the metal bar 16 and the middle of the two groups of arc-shaped scrapers 5 are aligned.

[0061] In other embodiments, during the induction heating process of the metal rod 16, if the metal rod 16 is not coaxial with the furnace mouth 1001, the alternating magnetic field distribution will be unbalanced. This is because the medium-frequency induction heating relies on the alternating magnetic field generated by the coil to excite eddy currents in the metal rod 16, and the symmetry of the magnetic field directly affects the eddy current distribution. When the metal rod 16 is offset from the axis of the furnace mouth 1001, the distance between each part of the coil and the rod will be different, and the magnetic field strength on the near side is higher than that on the far side, which makes the eddy current density unevenly distributed on the cross section of the rod, thereby causing regional deviations in the heating temperature field.

[0062] Based on this, in the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace provided in the embodiment of the present invention, the radius of the arc scraper 5 is set to be equal to the radius of the metal bar 16; when the clamping hook 4 is in the second position, the arc scraper 5 and the furnace mouth 1001 of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are coaxially arranged. In this way, a three-level coaxial positioning system of "furnace mouth 1001-arc scraper 5-metal bar 16" is constructed: the arc scraper 5 acts as an intermediate medium, and the point contact between its arc surface and the outer surface of the metal bar 16 forms a radial constraint, eliminating the offset freedom of the metal bar 16; at the same time, the coaxial relationship between the arc scraper 5 and the furnace mouth 1001 is transmitted to the metal bar 16 through a rigid connection, ensuring the coincidence of the axis of the metal bar 16 and the axis of the furnace mouth 1001.

[0063] When the axis of the metal bar 16 is coaxial with the axis of the furnace mouth 1001, the alternating magnetic lines of force generated by the coil are evenly distributed in a circular pattern centered on the axis of the metal bar 16. This ensures a consistent density of magnetic lines of force penetrating the cross-section of the metal bar 16. This symmetry ensures the same rate of change of magnetic flux across all parts of the metal bar 16. According to the law of electromagnetic induction, the eddy currents are evenly distributed across the cross-section of the metal bar 16, thereby achieving radial uniformity in the heating temperature field. Furthermore, the coaxial structure reduces magnetic field leakage and energy loss, allowing the electromagnetic field energy to act more concentratedly on the metal bar 16, further improving heating efficiency and temperature uniformity.

[0064] In other embodiments, to further ensure that the metal bar 16 enters the inner side of the clamping hook 4 stably and with less resistance, the radius of the hook end 401 of the clamping hook 4 is set to be larger than the radius of the metal bar 16 .

[0065] Specifically in this embodiment, when the clamping hook 4 is located at the lower layer, the geometric relationship between the hook end 401 and the radius of the metal bar 16 enables the clamping hook 4 to be located at the periphery of the metal bar 16, thereby avoiding affecting the entry of the metal bar 16.

[0066] In other embodiments, in order to facilitate the conveying of the metal rod 16 to the clamping hook 4 located on the lower layer, the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are configured to also include two stepped loaders 8, and the two stepped loaders 8 are arranged in the left and right directions, and the stepped loader 8 located on the left is configured to be able to convey the metal rod 16 to the clamping hook 4 on the upper side of the chain plate 3 located on the lower layer, and the stepped loader 8 located on the right is configured to be able to convey the metal rod 16 to the clamping hook 4 on the lower side of the chain plate 3 located on the lower layer.

[0067] It can be understood that the stepped loader 8 can adopt an automatic loader for round steel specially used in medium frequency furnaces as disclosed in patent document CN115872124A, or an automatic loader for round steel used in medium frequency furnaces as disclosed in patent document CN117516179B.

[0068] In other embodiments, in order to facilitate the transportation of the metal rod 16 from the clamping hook 4 to the furnace mouth 1001, the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are configured to also include a pushing machine 9. The pushing machine 9 has a frame, which is a door-shaped structure and is located on the front side of the machine base 1. A plurality of driving cylinders are arranged on the rear side wall of the horizontal part of the frame. The driving cylinders and the furnace mouth 1001 are arranged correspondingly, and the output shafts of the driving cylinders are arranged horizontally toward the rear. When in use, all the driving cylinders are started, and the output shafts of the driving cylinders are extended to synchronously push the metal rod 16 clamped by the clamping hook 4 on the upper side of the chain plate 3 and the clamping hook 4 on the lower side into the furnace mouth 1001.

[0069] It is understandable that the driving cylinder can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0070] In an embodiment in which the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace include both a stepped loader 8 and a pusher 9 , the pusher 9 is located between the stepped loader 8 and the machine base 1 .

[0071] In other embodiments, the furnace body 10 is a two-stage structure and is arranged in the front-to-back direction, wherein the furnace body 10 located at the front side is configured to preheat the metal rod 16, and the furnace body 10 located at the rear side is configured to formally heat the metal rod 16, thereby constructing a progressive heating path through segmented temperature management, fundamentally solving the problems of thermal stress concentration and energy loss caused by sudden temperature rise in traditional single-stage heating.

[0072] In a further embodiment, in order to realize the automatic advancement of the metal bar 16, the two furnace bodies 10 are arranged at intervals, and two second drive motors 13 are provided between the two furnace bodies 10. The two second drive motors 13 are arranged at intervals in the vertical direction and in the left and right directions. The motor shaft of the second drive motor 13 on the left is horizontally arranged to the right and corresponds to a row of furnace openings 1001 located below. A plurality of first runners 14 are fixedly sleeved on the motor shaft of the second drive motor 13. The plurality of first runners 14 are arranged axially and correspond to the furnace openings 1001; the second drive motor 13 on the right is arranged at intervals in the vertical direction and in the left and right directions. The motor shaft of the second drive motor 13 is arranged horizontally to the left and corresponds to a row of furnace openings 1001 located above. A plurality of first runners 14 are fixedly sleeved on the motor shaft of the second drive motor 13. The plurality of first runners 14 are arranged axially and correspond to the furnace openings 1001. A plurality of second runners 15 are also arranged between the two furnace bodies 10. The plurality of second runners 15 are arranged in the left and right directions. The axis of the second runner 15 is parallel to the axis of the motor shaft of the second drive motor 13. When installed, the second runner 15 and the first runner 14 are located on both sides of the same metal bar 16, thereby assisting the movement of the metal sheet.

[0073] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. An accessory for a multi-tube high-temperature horizontal medium-frequency induction heating furnace, characterized in that: The accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace include a machine base, on which two chains are parallel and horizontally arranged, and each chain forms a closed conveying loop; a plurality of chain plates are commonly connected between the two chains, and the plurality of chain plates form a ring structure, and the adjacent chain plates are hingedly connected; each chain plate is provided with a clamping hook, and the clamping hook is a strip structure and is parallel to the metal bar, and the clamping hooks on adjacent chain plates are staggered along the inside and outside and in the same direction; each clamping hook is provided with a plurality of arc scrapers, and the plurality of arc scrapers are arranged at intervals along the extension direction of the clamping hook, and are fixedly connected and can slide in a direction perpendicular to the chain plate, and the opening of the arc scraper faces the Chain plate; each of the clamping hooks is connected to the chain plate through a sliding assembly, a rotating assembly and the chain plate. Under the action of the sliding assembly, the clamping hook can slide in a direction perpendicular to the chain plate, and has a corresponding first position and second position before and after sliding. When in the first position, the clamping hook is set away from the chain plate, and an installation area for placing the metal bar is formed between the two. When in the second position, the clamping hook is set close to the chain plate. The clamping hook is configured to clamp the metal bar, and the arc-shaped scraper is wrapped around the metal bar. Under the action of the rotating assembly, the metal bar can rotate around its own axis to scrape off impurities adhered to the surface of the metal bar through the arc-shaped scraper.

2. The accessory of the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The sliding assembly includes a first ring groove and a second ring groove. The first ring groove is arranged on the machine base, and there are two of them, which are symmetrically arranged; the second ring groove is arranged on the machine base and is located on the inner side of the first ring groove. There are two of them, which are symmetrically arranged; each of the clamping hooks is provided with sliding rods on both sides along the length direction, and the two sliding rods on the same clamping hook located on the outer side of the chain plate are respectively slidably inserted into the two first ring grooves, and the two sliding rods on the same clamping hook located on the inner side of the chain plate are respectively slidably inserted into the two second ring grooves.

3. The accessory of the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 2, characterized in that: The sliding rod is capable of rotating around its own axis; the rotating assembly includes a first ring rack and a second ring rack, the first ring rack is arranged on the machine base, and there are two of them, and they coincide with the trajectory of the first ring groove; the second ring rack is arranged on the machine base, and there are two of them, and they coincide with the trajectory of the second ring groove; each of the sliding rods is fixedly sleeved with a first gear and a second gear, the first gears on the two sliding rods on the same clamping hook on the outer side of the chain plate are respectively meshed with the two first ring racks, and the first gears on the two sliding rods on the same clamping hook on the inner side of the chain plate are respectively meshed with the two second ring racks; each of the clamping hooks is provided with a rotating rod on both sides along the length direction. , each of the rotating rods is fixedly sleeved with a third gear, and the third gear is meshed with the second gear; each of the clamping hooks is provided with a transmission roller in parallel, and the transmission roller can not only elastically slide in a direction perpendicular to the chain plate, but also rotate around its own axis, and can frictionally transmit with the rotating rod, and the transmission roller can simultaneously form a stop fit with the chain plate; all the transmission rollers located on the outside of the chain plate are simultaneously sleeved with a first friction belt, and the first friction belt can simultaneously form friction transmission with the transmission roller and the metal bar; all the transmission rollers located on the inside of the chain plate are simultaneously sleeved with a second friction belt, and the second friction belt can simultaneously form friction transmission with the transmission roller and the metal bar.

4. The accessory of the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The arc-shaped scrapers are arranged obliquely; the multiple arc-shaped scrapers on the same clamping hook are divided into two groups, and the two groups of arc-shaped scrapers are arranged symmetrically.

5. The accessory for the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The radius of the arc-shaped scraper is equal to the radius of the metal bar; when the clamping hook is in the second position, the arc-shaped scraper and the furnace mouth of the multi-tube high-temperature horizontal medium-frequency induction heating furnace are coaxially arranged.

6. The accessory for the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The radius of the hook end of the clamping hook is greater than the radius of the metal bar.

7. The accessory for the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace also include two stepped loaders, which are configured to respectively transfer the metal bars to the installation areas on both sides of the chain plate located at the lower layer.

8. The accessory for the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 1, characterized in that: The accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace also include a pusher, which is configured to push the metal bars on both sides of the chain plate located on the upper layer toward the multi-tube high-temperature horizontal medium-frequency induction heating furnace.

9. A multi-tube high-temperature horizontal medium-frequency induction heating furnace, characterized in that: The accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace according to any one of claims 1 to 8 are used for loading. The multi-tube high-temperature horizontal medium-frequency induction heating furnace includes a furnace body, and two rows of furnace openings are provided on the furnace body, and the furnace openings in different rows are staggered.

10. The multi-tube high-temperature horizontal medium-frequency induction heating furnace according to claim 9, characterized in that: The furnace body has a two-section structure, and the furnace body on the side close to the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace is configured to preheat the metal bars; the furnace body on the side away from the accessories of the multi-tube high-temperature horizontal medium-frequency induction heating furnace is configured to heat the metal bars.

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