Feeding detection device and heating furnace system

Abstract

The present invention discloses a feeding detection device and a heating furnace system, which relate to the field of steel rolling technology. The feeding detection device includes a frame, a feeding rack, a first rangefinder, a second rangefinder and a controller. The feeding rack is installed in the frame and is electrically connected to the controller. The first rangefinder and the second rangefinder are both installed on the frame and are relatively arranged on both sides of the feeding rack, and are both electrically connected to the controller. The first rangefinder is used to measure the first distance between it and the steel billet, and the second rangefinder is used to measure the second distance between it and the steel billet. The controller is used to judge the number of steel billets and whether the steel billets have quality defects based on the first and second distances, and control the feeding rack to pause when the number of steel billets is greater than one or the steel billets have quality defects. The feeding detection device provided by the present invention can accurately detect the number and quality defects of steel billets, ensure that the steel billets can smoothly enter the heating furnace, improve production efficiency, and be safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of steel rolling, and in particular to a feeding detection device and a heating furnace system. Background Art

[0002] Currently, during the steel rolling process, the steel billets on the feed rack must first be transferred to the conveyor rollers via a stepping mechanism, and then transported to the heating furnace via the conveyor rollers. However, in actual production, steel billets are long and strip-shaped, making it easy for two or more billets to be on the feed rack at the same time, or for a billet with quality defects to be on the feed rack. In either case, if the conveyor rollers continue to feed the billets into the heating furnace, they will collide with the furnace door, preventing the billets from entering the heating furnace smoothly. This not only affects production efficiency, but also easily damages equipment and may even cause safety accidents.

[0003] In view of this, it is particularly important to design and manufacture a feeding detection device and a heating furnace system that can detect the quantity and quality defects of steel billets, especially in steel rolling production. Summary of the Invention

[0004] The object of the present invention is to provide a feeding detection device that can accurately detect the quantity and quality defects of steel billets, ensure that the steel billets enter the heating furnace smoothly, improve production efficiency, and be safe and reliable.

[0005] Another object of the present invention is to provide a heating furnace system that can accurately detect the quantity and quality defects of steel billets, ensure that the steel billets enter the heating furnace smoothly, improve production efficiency, and be safe and reliable.

[0006] The present invention is achieved by adopting the following technical solutions.

[0007] A feeding detection device includes a frame, a feeding rack, a first distance meter, a second distance meter and a controller. The feeding rack is installed in the frame and electrically connected to the controller. The feeding rack is used to feed steel billets to a conveyor roller. The first distance meter and the second distance meter are both installed on the frame and arranged on both sides of the feeding rack relatively, and are both electrically connected to the controller. The first distance meter is used to measure a first distance between itself and the steel billet, and the second distance meter is used to measure a second distance between itself and the steel billet. The controller is used to judge the number of steel billets and whether the steel billets have quality defects based on the first distance and the second distance, and to control the feeding rack to pause when the number of steel billets is greater than one or the steel billets have quality defects.

[0008] Optionally, the controller includes a calculation module and a judgment module, the first rangefinder and the second rangefinder are both electrically connected to the calculation module, the calculation module is used to calculate the actual size of the steel billet based on the first spacing and the second spacing, the calculation module is electrically connected to the feeding rack through the judgment module, and the judgment module is used to judge the number of steel billets and whether the steel billets have quality defects based on the actual size of the steel billets.

[0009] Optionally, the calculation module is used to calculate the actual size through a calculation formula, wherein the calculation formula is: S0=S-S1-S2; wherein S0 is the actual size, S is the distance between the first rangefinder and the second rangefinder, S1 is the first distance, and S2 is the second distance.

[0010] Optionally, the judgment module is used to compare the actual size with the standard size of the steel billet; if the actual size is greater than or equal to twice the standard size, it is judged that the number of steel billets is greater than one; if the difference between the actual size and the standard size is greater than a preset length, it is judged that the steel billet has a bulging defect.

[0011] Optionally, the preset length ranges from 3 mm to 5 mm.

[0012] Optionally, the connecting line between the first rangefinder and the second rangefinder is located on a horizontal plane and is arranged perpendicular to the length direction of the steel billet.

[0013] Optionally, the connecting line between the first rangefinder and the second rangefinder is located on a vertical plane and is arranged perpendicular to the length direction of the steel billet.

[0014] Optionally, the feeding detection device also includes a third rangefinder and a fourth rangefinder installed on the frame, the third rangefinder and the fourth rangefinder are both arranged on the side of the feeding rack close to the first rangefinder, and are both electrically connected to the controller, the first rangefinder, the third rangefinder and the fourth rangefinder are arranged at equal intervals, the first rangefinder is used to measure the first distance between it and the head of the steel billet, the third rangefinder is used to measure the third distance between it and the middle of the steel billet, and the fourth rangefinder is used to measure the fourth distance between it and the tail of the steel billet, and the controller is used to judge the degree of bending of the steel billet based on the first distance, the third distance and the fourth distance, and control the feeding rack to pause when the degree of bending of the steel billet is greater than the preset bending degree.

[0015] Optionally, the controller is used to compare the average value of the first spacing and the fourth spacing with the third spacing; if the difference between the average value and the third spacing is greater than 50 mm, it is determined that the degree of bending of the steel billet is greater than a preset degree of bending.

[0016] A heating furnace system includes the above-mentioned feeding detection device, which includes a frame, a feeding rack, a first distance meter, a second distance meter and a controller. The feeding rack is installed in the frame and is electrically connected to the controller. The feeding rack is used to feed the steel billet to the conveyor roller. The first distance meter and the second distance meter are both installed on the frame and are relatively arranged on both sides of the feeding rack, and are both electrically connected to the controller. The first distance meter is used to measure a first distance between it and the steel billet, and the second distance meter is used to measure a second distance between it and the steel billet. The controller is used to judge the number of steel billets and whether the steel billets have quality defects based on the first distance and the second distance, and control the feeding rack to pause when the number of steel billets is greater than one or the steel billet has quality defects.

[0017] The feeding detection device and heating furnace system provided by the present invention have the following beneficial effects:

[0018] The feeding detection device provided by the present invention has a feeding rack installed in a frame and electrically connected to a controller. The feeding rack is used to feed steel billets to a conveyor roller. A first distance meter and a second distance meter are both installed on the frame and arranged on opposite sides of the feeding rack, and are both electrically connected to the controller. The first distance meter is used to measure a first distance between the first distance meter and the steel billet, and the second distance meter is used to measure a second distance between the first distance meter and the steel billet. The controller is used to determine the number of steel billets and whether the steel billets have quality defects based on the first and second distances, and to control the feeding rack to pause when the number of steel billets is greater than one or the steel billets have quality defects. Compared with the prior art, the feeding detection device provided by the present invention uses the first and second distance meters arranged on opposite sides of the feeding rack and the controller electrically connected to the feeding rack. Therefore, it can accurately detect the number and quality defects of steel billets, ensure that the steel billets can smoothly enter the heating furnace, improve production efficiency, and be safe and reliable.

[0019] The heating furnace system provided by the present invention includes a feeding detection device, which can accurately detect the quantity and quality defects of steel billets, ensure that the steel billets enter the heating furnace smoothly, improve production efficiency, and be safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic structural diagram of a heating furnace system provided in an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a feeding detection device provided in an embodiment of the present invention;

[0023] Figure 3 A block diagram of the structure of a feeding detection device provided in an embodiment of the present invention;

[0024] Figure 4 This is a mathematical model diagram of the feeding detection device provided in an embodiment of the present invention.

[0025] Icons: 10-heating furnace system; 100-feeding detection device; 110-frame; 120-feeding rack; 130-first distance meter; 140-second distance meter; 150-controller; 151-calculation module; 152-judgment module; 160-third distance meter; 170-fourth distance meter; 200-loading platform; 300-conveyor roller; 400-heating furnace; 500-billet. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of the present invention, it should be noted that the terms "inner," "outer," "upper," "lower," and "horizontal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and 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. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and should not be construed as indicating or implying relative importance.

[0030] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0032] First embodiment

[0033] Please refer to Figures 1 to 4 The present invention provides a heating furnace system 10 for steel rolling. The system can accurately detect the quantity and quality defects of steel billets 500, ensuring that the steel billets 500 smoothly enter the heating furnace 400, thereby improving production efficiency and ensuring safety and reliability.

[0034] It should be noted that the heating furnace system 10 includes a feeding detection device 100, a loading platform 200, a conveyor roller 300, and a heating furnace 400. The feeding detection device 100 is provided with a feeding platform 120, which is disposed at one end of the conveyor roller 300, and the heating furnace 400 is disposed at the other end of the conveyor roller 300. The steel billets 500 are long strips. During the feeding process of the steel billets 500, the steel billets 500 are first hoisted to the loading platform 200 by a crane, so that multiple steel billets 500 are stored in rows on the loading platform 200. The steel billets 500 on the loading platform 200 are then moved to the feeding platform 120 using a stepping mechanism. The steel billets 500 on the feeding platform 120 are then transported to the conveyor roller 300 using a steel separation stepping device. Finally, the steel billets 500 are transported into the heating furnace 400 using the conveyor roller 300.

[0035] Specifically, in the process of the stepping mechanism moving the steel billets 500 on the loading platform 200 to the feeding rack 120, the steel billets 500 may be transported overlappingly or side by side, resulting in more than one steel billet 500 being delivered to the feeding rack 120, or a steel billet 500 with quality defects may be delivered to the feeding rack 120. The feeding rack 120 is used to deliver the steel billets 500 to the conveyor roller 300. If the conveyor roller 300 delivers multiple steel billets 500 or steel billets 500 with quality defects into the heating furnace 400, the steel billets 500 will collide with the furnace door, making it impossible for the steel billets 500 to enter the heating furnace 400 smoothly, which will not only affect production efficiency, but also easily damage equipment and may even cause safety accidents. After such problems occur, they need to be hoisted by an overhead crane, but the width of the conveyor roller 300 is narrower than the overhead crane disk, making operation difficult and easily damaging the conveyor roller 300. Therefore, in this embodiment, the feeding detection device 100 is used to detect the number and quality defects of the steel billets 500 on the feeding rack 120. If it is found that the number of steel billets 500 is greater than one or the steel billets 500 have quality defects, the feeding rack 120 is controlled to pause and an alarm is issued to remind the operator to unload the steel billets 500 or remove them, thereby ensuring that the steel billets 500 are fed into the heating furnace 400 one by one, and that the quality of the steel billets 500 fed into the heating furnace 400 is qualified, and there will be no steel jamming in the furnace.

[0036] The feeding detection device 100 includes a frame 110, a feeder rack 120, a first distance meter 130, a second distance meter 140, and a controller 150. The feeder rack 120 is mounted within the frame 110 and electrically connected to the controller 150. The feeder rack 120 is used to feed the steel billets 500 to the conveyor roller 300. The first distance meter 130 and the second distance meter 140 are both mounted on the frame 110, oppositely positioned on either side of the feeder rack 120, and electrically connected to the controller 150. The first distance meter 130 measures a first distance between itself and the steel billets 500, while the second distance meter 140 measures a second distance between itself and the steel billets 500. The controller 150 determines the number of steel billets 500 and whether any of the steel billets 500 have quality defects based on the first and second distances. If the number of steel billets 500 exceeds one or if any of the steel billets 500 have quality defects, the controller 150 controls the feeder rack 120 to pause and alert the operator to conduct an inspection. If the number of steel billets 500 exceeds one, unloading is required to remove the excess steel billets 500 from the feed rack 120. If the steel billets 500 have quality defects, scrapping is required to replace the defective steel billets 500. In this way, the number and quality defects of the steel billets 500 can be accurately detected, ensuring that the steel billets 500 can enter the heating furnace 400 smoothly, improving production efficiency and ensuring safety and reliability.

[0037] The controller 150 includes a calculation module 151 and a judgment module 152. The first and second rangefinders 130 and 140 are both electrically connected to the calculation module 151. The first and second rangefinders 130 and 140 are configured to transmit their measured first and second spacings to the calculation module 151, which then calculates the actual size of the steel billets 500 based on the first and second spacings. The calculation module 151 is electrically connected to the feeder 120 via the judgment module 152. The judgment module 152 is configured to determine the number of steel billets 500 and whether any of the steel billets 500 have quality defects based on their actual sizes. The judgment module 152 then controls the feeder 120 to pause if it determines that there is more than one steel billet 500 or that any of the steel billets 500 have quality defects.

[0038] It is worth noting that the calculation module 151 is used to calculate the actual size through a calculation formula, wherein the calculation formula is: S0=S-S1-S2; where S0 is the actual size, S is the distance between the first rangefinder 130 and the second rangefinder 140, S1 is the first distance, and S2 is the second distance.

[0039] Furthermore, the judgment module 152 is used to compare the actual size and the standard size of the steel billet 500; if the actual size is greater than or equal to twice the standard size, it is judged that the number of steel billets 500 is greater than one, and multiple steel billets 500 are overlapped or arranged side by side. At this time, the judgment module 152 controls the feed rack 120 to pause for unloading processing; if the difference between the actual size and the standard size is greater than the preset length, it is judged that the steel billet 500 has a bulging defect. At this time, the judgment module 152 controls the feed rack 120 to pause for waste removal processing.

[0040] Specifically, the preset length ranges from 3 mm to 5 mm, with different preset lengths required for different types of steel billets 500. In this embodiment, the preset length is 4 mm. If the difference between the actual size and the standard size is greater than 4 mm, the steel billet 500 is determined to have a bulging defect and needs to be rejected. If the difference between the actual size and the standard size is less than or equal to 4 mm, the steel billet 500 is determined not to have a bulging defect and can continue to be conveyed. However, this is not limiting. In other embodiments, the preset length can be 3 mm or 5 mm, and there is no specific limitation on the preset length.

[0041] In this embodiment, the line connecting the first rangefinder 130 and the second rangefinder 140 is located on a horizontal plane and is arranged perpendicular to the length of the steel billets 500. This means that the feeding inspection device 100 is used to horizontally inspect the steel billets 500 for quantity and quality defects. Specifically, if the measured actual size is greater than or equal to twice the standard size, it is determined that multiple steel billets 500 are arranged side by side. If the difference between the measured actual size and the standard size is greater than a preset length, it is determined that the steel billets 500 have a horizontal bulging defect.

[0042] In this embodiment, the feeding detection device 100 further includes a third rangefinder 160 and a fourth rangefinder 170. Both the third rangefinder 160 and the fourth rangefinder 170 are mounted on the frame 110 and located on the side of the feeder 120 near the first rangefinder 130. Both the third rangefinder 160 and the fourth rangefinder 170 are electrically connected to the controller 150. The first, third, and fourth rangefinders 130, 160, and 170 are equally spaced. The first rangefinder 130 measures a first distance between itself and the head of the billet 500, the third rangefinder 160 measures a third distance between itself and the middle of the billet 500, and the fourth rangefinder 170 measures a fourth distance between itself and the tail of the billet 500. The controller 150 determines the degree of curvature of the billet 500 based on the first, third, and fourth distances. If the curvature of the billet 500 exceeds a predetermined degree, the feeder 120 is paused to alert the operator to conduct an inspection. Specifically, if the bending degree of the steel billet 500 is greater than the preset bending degree, it is determined that the steel billet 500 has a bending defect in the horizontal direction and needs to be rejected and the steel billet 500 with the bending defect needs to be replaced.

[0043] Furthermore, controller 150 is configured to compare the average of the first and fourth spacings with the third spacing. If the difference between the average and the third spacing is greater than 50 mm, the degree of curvature of billet 500 is determined to be greater than a predetermined curvature, billet 500 has a curvature defect, and needs to be rejected. If the difference between the average and the third spacing is less than or equal to 50 mm, the degree of curvature of billet 500 is determined to be less than the predetermined curvature, billet 500 does not have a curvature defect, and can continue to be conveyed. For ease of understanding, the third spacing is represented as S3 and the fourth spacing is represented as S4.

[0044] The feeding detection device 100 provided by an embodiment of the present invention has a feeding rack 120 installed in a frame 110 and electrically connected to a controller 150. The feeding rack 120 is used to feed the steel billet 500 to the conveyor roller 300. The first distance meter 130 and the second distance meter 140 are both installed on the frame 110 and are relatively arranged on both sides of the feeding rack 120, and are both electrically connected to the controller 150. The first distance meter 130 is used to measure a first distance between itself and the steel billet 500, and the second distance meter 140 is used to measure a second distance between itself and the steel billet 500. The controller 150 is used to judge the number of steel billets 500 and whether the steel billet 500 has quality defects based on the first distance and the second distance, and to control the feeding rack 120 to pause when the number of steel billets 500 is greater than one or the steel billet 500 has quality defects. Compared to the prior art, the feeding detection device 100 provided by the present invention utilizes a first rangefinder 130 and a second rangefinder 140 disposed on opposite sides of a feeding frame 120, and a controller 150 electrically connected to the feeding frame 120. Therefore, it can accurately detect the quantity and quality defects of the steel billets 500, ensuring that the steel billets 500 smoothly enter the heating furnace 400, thereby improving production efficiency and ensuring safety and reliability. This makes the heating furnace system 10 stable, durable, and highly efficient.

[0045] Second embodiment

[0046] The embodiment of the present invention provides a feeding detection device 100 . Compared with the first embodiment, the difference of this embodiment lies in that the first rangefinder 130 , the second rangefinder 140 , the third rangefinder 160 , and the fourth rangefinder 170 are arranged in different positions.

[0047] In this embodiment, the line connecting the first rangefinder 130 and the second rangefinder 140 is located on a vertical plane and is perpendicular to the length of the steel billet 500. This means that the feeding inspection device 100 is used to vertically inspect the steel billets 500 for quantity and quality defects. Specifically, if the measured actual size is greater than or equal to twice the standard size, it is determined that multiple steel billets 500 are stacked. If the difference between the measured actual size and the standard size is greater than a preset length, it is determined that the steel billet 500 has a bulging defect in the vertical direction.

[0048] Furthermore, the first rangefinder 130, the third rangefinder 160 and the fourth rangefinder 170 are all arranged above or below the feeding rack 120, and the controller 150 is used to judge the degree of bending of the steel billet 500 based on the first spacing, the third spacing and the fourth spacing. If the degree of bending of the steel billet 500 is greater than the preset bending degree, it is judged that the steel billet 500 has a bending defect in the vertical direction and needs to be rejected and replaced.

[0049] The beneficial effects of the feeding detection device 100 provided in the embodiment of the present invention are the same as those of the first embodiment, and will not be described in detail here.

[0050] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A feeding detection device, characterized in that: The invention comprises a frame (110), a feeding frame (120), a first distance meter (130), a second distance meter (140) and a controller (150), wherein the feeding frame (120) is installed in the frame (110) and is electrically connected to the controller (150), the feeding frame (120) is used to feed the steel billet (500) to the conveying roller (300), the first distance meter (130) and the second distance meter (140) are both installed in the frame (110), and are relatively arranged on both sides of the feeding frame (120), and are both connected to the controller (150) are electrically connected, the first distance meter (130) is used to measure a first distance between it and the steel billet (500), the second distance meter (140) is used to measure a second distance between it and the steel billet (500), the controller (150) is used to judge the number of the steel billets (500) and whether the steel billets (500) have quality defects based on the first distance and the second distance, and control the feeding rack (120) to pause when the number of the steel billets (500) is greater than one or the steel billet (500) has quality defects; The connecting line between the first rangefinder (130) and the second rangefinder (140) is located on a horizontal plane and is arranged perpendicular to the length direction of the steel billet (500); or the connecting line between the first rangefinder (130) and the second rangefinder (140) is located on a vertical plane and is arranged perpendicular to the length direction of the steel billet (500).

2. The feeding detection device according to claim 1, characterized in that: The controller (150) includes a calculation module (151) and a judgment module (152), the first distance meter (130) and the second distance meter (140) are both electrically connected to the calculation module (151), the calculation module (151) is used to calculate the actual size of the steel billet (500) according to the first spacing and the second spacing, the calculation module (151) is electrically connected to the feeding rack (120) through the judgment module (152), and the judgment module (152) is used to judge the quantity of the steel billets (500) and whether the steel billets (500) have quality defects according to the actual size of the steel billets (500).

3. The feeding detection device according to claim 2, characterized in that: The calculation module (151) is used to calculate the actual size through a calculation formula, wherein the calculation formula is: S0=S-S1-S2; In the formula, S0 is the actual size, S is the distance between the first rangefinder (130) and the second rangefinder (140), S1 is the first distance, and S2 is the second distance.

4. The feeding detection device according to claim 2, characterized in that: The judgment module (152) is used to compare the actual size with the standard size of the steel billet (500); if the actual size is greater than or equal to twice the standard size, it is judged that the number of the steel billets (500) is greater than one; if the difference between the actual size and the standard size is greater than a preset length, it is judged that the steel billet (500) has a bulging defect.

5. The feeding detection device according to claim 4, characterized in that: The preset length ranges from 3 mm to 5 mm.

6. The feeding detection device according to claim 1, characterized in that: The feeding detection device further comprises a third distance meter (160) and a fourth distance meter (170) mounted on the frame (110); the third distance meter (160) and the fourth distance meter (170) are both arranged on a side of the feeding frame (120) close to the first distance meter (130), and are both electrically connected to the controller (150); the first distance meter (130), the third distance meter (160) and the fourth distance meter (170) are arranged at equal intervals; the first distance meter (130) is used to measure the distance between the first distance meter (130) and the fourth distance meter (170); The first spacing between the heads of the steel billets (500), the third distance meter (160) is used to measure the third spacing between it and the middle of the steel billet (500), the fourth distance meter (170) is used to measure the fourth spacing between it and the tail of the steel billet (500), the controller (150) is used to judge the degree of bending of the steel billet (500) based on the first spacing, the third spacing and the fourth spacing, and control the feeding rack (120) to pause when the degree of bending of the steel billet (500) is greater than a preset bending degree.

7. The feeding detection device according to claim 6, characterized in that: The controller (150) is used to compare the average value of the first spacing and the fourth spacing with the third spacing; if the difference between the average value and the third spacing is greater than 50 mm, it is determined that the bending degree of the steel billet (500) is greater than the preset bending degree.

8. A heating furnace system, characterized in that: It comprises the feeding detection device according to any one of claims 1 to 7.

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