A reduction annealing furnace for hot-dip galvanizing of steel strip

Abstract

The present application relates to the technical field of strip annealing, and discloses a reduction annealing furnace for hot-dip galvanizing of strip steel, comprising an annealing furnace body, a feed roller arranged at a feed end, and a discharge roller arranged at a discharge end of the annealing furnace body, and further comprising: a transmission unit, arranged in the annealing furnace body, for transporting the strip steel in the annealing furnace and performing annealing and reduction treatments in sequence; the transmission unit comprises: a first conveying roller, arranged at the bottom of the annealing furnace body and arranged relatively, a plurality of groups of the first conveying rollers are arranged equidistantly along the length direction of the annealing furnace body, and the problem in the prior art that after nodule substances appear on the conveying rollers in the annealing furnace body, the furnace needs to be stopped for inspection and the conveying rollers need to be replaced, which affects the annealing and reduction reaction of the strip steel, and the nodule conveying rollers can be replaced in time and the normal operation of the strip steel can be maintained to improve the efficiency of the annealing and reduction treatment of the strip steel.

Description

Technical Field

[0001] The present application relates to the technical field of strip steel annealing, and in particular to a reduction annealing furnace for hot-dip galvanizing of strip steel. Background Art

[0002] The galvanizing annealing furnace is mainly a device that anneals and galvanizes steel or aluminum materials at high temperatures. Its working principle is to place the material in the furnace at high temperature and then heat it to reach the required annealing temperature. Then, it is galvanized to give it a bright and anti-corrosion effect.

[0003] However, in the process of implementing relevant technical solutions, it was found that at least the following technical problems exist: since the carbon sleeve itself has a certain degree of tiny gaps, under high-temperature conditions, the surface roughness will gradually increase with the extension of use time, and the iron powder, silicon mud and other residues on the surface of the cold-rolled electrical steel will be oxidized and reduced in the high dew point and high hydrogen atmosphere in the furnace, and then melted and bonded to the surface of the carbon sleeve to accumulate to form nodules. The carbon sleeve furnace rollers with nodules will produce periodic imprints on the softer steel strip surface during high-temperature annealing, causing product degradation and scrapping. Summary of the invention

[0004] The present application provides a reduction annealing furnace for hot-dip galvanizing of steel strips, thereby solving the problem in the prior art that when nodules appear on the conveyor rollers in the annealing furnace body, the furnace needs to be stopped for inspection and the conveyor rollers need to be replaced, which affects the annealing reduction reaction of the steel strips. The application realizes timely replacement of the nodulated conveyor rollers and maintains the normal operation of the steel strips, thereby improving the efficiency of the annealing reduction treatment of the steel strips.

[0005] The present application provides a reduction annealing furnace for hot-dip galvanizing of steel strips, comprising an annealing furnace body, a feed roller arranged at a feed end of the annealing furnace body, and a discharge roller arranged at a discharge end of the annealing furnace body, and further comprising: a transmission unit arranged in the annealing furnace body, and used to transport the steel strips in the annealing furnace body and perform annealing and reduction treatments in sequence; the transmission unit comprises: a first conveying roller, arranged at the bottom of the annealing furnace body and arranged oppositely, and a plurality of groups of the first conveying rollers are arranged equidistantly along the length direction of the annealing furnace body; a second conveying roller, arranged at the top of the annealing furnace body, and a plurality of groups of the second conveying rollers are arranged equidistantly along the length direction of the annealing furnace body; a second conveying roller, arranged at the top of the annealing furnace body, and a plurality of groups of the second conveying rollers are arranged equidistantly along the length direction of the annealing furnace body; a first ... first conveying roller, arranged at the top of the annealing furnace body, and a first conveying roller, arranged at the top of the annealing furnace body, and a second conveying roller, arranged at the top of the annealing furnace body; a first conveying roller, arranged at the top of the annealing A roller changing assembly is provided between two adjacent groups of the first conveying rollers, and is used to replace the first conveying roller when a tumor is generated on the surface during high-temperature conveying; a second roller changing assembly is provided between the second conveying roller and the annealing furnace body, and is used to replace the second conveying roller when a tumor is generated on the surface during high-temperature conveying; the first roller changing assembly includes: a trigger mechanism, provided between two adjacent groups of the first conveying rollers, and is used to detect tumors formed on the surface of the first conveying roller and trigger the start; a switching assembly, provided on one side of the trigger mechanism, and is used to replace the first conveying roller with tumors formed on the surface, and to transfer the first conveying roller with tumors generated.

[0006] Furthermore, the second roller changing assembly includes: a conversion assembly connected to the second conveying roller, used to move the second conveying roller with a tumor away from the strip by rotating; a substitute assembly connected to the conversion assembly, used to replace the second conveying roller with a tumor and allow the strip to continue to be conveyed under the action of the substitute assembly; a trigger assembly, arranged on one side of the second conveying roller, used to control the start-up of the conversion assembly and the replacement assembly.

[0007] Furthermore, the trigger mechanism includes: a fixed block, arranged between two adjacent groups of the first conveying rollers; a trigger plate, arranged on one side of the first conveying roller, and a first ball is arranged between the trigger plate and the first conveying roller; and a first elastic member, arranged between the trigger plate and the fixed block.

[0008] Furthermore, the switching assembly includes: a first switching track, which is arranged on both sides of the first conveying roller in the length direction, and the first switching track is provided with a plurality of first tooth grooves in the length direction, and a first gear is meshingly connected in the first tooth groove, and the first gear is driven by a first power device and moves along the trajectory of the first switching track; a first replacement roller, which is coaxially connected to the first gear, and is used to follow the first gear to move along the first tooth groove and replace the first conveying roller with a tumor; a first limiting groove, which is arranged on the rear side of the first switching track; a second switching track, which is connected to the first switching track, and the second switching track is provided with a plurality of second tooth grooves in the length direction, and a limiting member is arranged between the first switching track and the second switching track; a second gear, which is coaxially connected to the first conveying roller, and the second gear is meshingly connected to the second tooth groove, and the second gear is driven by the second power device; a second limiting groove, which is arranged on the rear side of the second switching track.

[0009] Furthermore, the limiting member includes: a limiting block, which is arranged in the first switching track, and a limiting track is formed between the side wall of the limiting block close to the second switching track and the second switching track; a second elastic member, which is arranged between the annealing furnace body and the limiting block, and is used to control the extension and retraction of the limiting block to make the first gear move forward and the second gear move along the trajectory of the second switching track.

[0010] Furthermore, a receiving plate is provided between the two groups of the first conveying rollers, and the receiving plate is used to receive the collected debris.

[0011] Furthermore, the conversion assembly includes: a conversion wheel, connected to the second conveying roller, and the conversion wheel is provided with multiple groups of connecting plates along its circumferential direction, and the connecting plates are coaxially connected to the second conveying roller, the number of the connecting plates is greater than the number of the second conveying rollers, and the conversion wheel is driven by a third power device; a second replacement roller, arranged on the connecting plate, used to rotate the second conveying roller with a tumor 180 degrees following the conversion wheel so that the second replacement roller replaces the second conveying roller to convey the strip.

[0012] Furthermore, the conversion assembly also includes: a moving column, which is provided with two groups and is respectively arranged on two groups of second conveying rollers in symmetrical and horizontal positions, and the moving column is driven by a fourth power device; a limiting slide is opened on a connecting plate symmetrically arranged in the horizontal position of the conversion wheel, and the limiting slide matches the diameter of the moving column; the fourth power device drives the moving column to move along the limiting slide, so that the second conveying rollers located at both ends of the diameter of the conversion wheel move toward each other toward the center of the circle.

[0013] Furthermore, the trigger assembly includes: a support plate, arranged between two adjacent groups of the connecting plates; a trigger rod, arranged on both sides of the support plate, and a second ball is arranged between the trigger rod and the second conveying roller; and a third elastic member, arranged between the trigger rod and the support plate.

[0014] Furthermore, the replacement component includes: a replacement plate, which is rotatably arranged on the conversion wheel, and the replacement plate and the bottom of the annealing furnace body are in a vertical state, the replacement plate is driven by a fifth power device, a slide groove is provided on the replacement plate, and an avoidance groove for avoiding the moving column is provided on the side of the replacement plate close to the slide groove; a third replacement roller, which is respectively arranged at both ends of the replacement plate, and the third replacement roller is located inside the slide groove.

[0015] The technical solution provided by this application has at least the following technical effects or advantages:

[0016] (1) The present application adopts a first roller changing assembly. After the first ball is used to detect the presence of nodules on the first conveyor roller and confirm the position of the first conveyor roller, the first conveyor roller is controlled to move to a position away from the strip to avoid it, and at the same time, the first replacement roller is moved to the position of the strip to continue conveying the strip. Therefore, the problem of the existing first conveyor roller having to be stopped for inspection and then replaced after the presence of nodules is solved, which affects the efficiency of the annealing and reduction treatment of the strip.

[0017] (2) The present application adopts a second roller replacement assembly, which detects whether there is a nodule on the second conveyor roller through the second ball. If it appears, the conversion wheel is controlled to replace the second conveyor roller with the second replacement roller and the third replacement roller, and the second conveyor roller continues to convey the strip after the replacement. Therefore, the problem of the existing second conveyor roller having a nodule and needing to stop the furnace for inspection before replacing the second conveyor roller is effectively solved, which affects the efficiency of the annealing and reduction treatment of the strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall isometric structure of the first embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the overall front view of the structure of the first embodiment of the present application;

[0020] Figure 3 It is a schematic structural diagram of a partial cross section of the first replacement component in the first embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of a partially exploded structure of the first replacement component in Example 1 of the present application;

[0022] Figure 5 Based Figure 4 The enlarged structural diagram at A in the middle;

[0023] Figure 6 This is a schematic diagram of the front view of the first replacement component in Embodiment 1 of the present application;

[0024] Figure 7 for Figure 6A schematic diagram of the structure in which the first conveying roller moves to the end of the second switching track after a tumor occurs;

[0025] Figure 8 for Figure 6 A schematic structural diagram of the first replacement roller moving along the first switching track;

[0026] Fig. 9 It is a schematic structural diagram of another angle section of the first replacement component in the first embodiment of the present application;

[0027] Fig.10 This is a schematic diagram of the structure of the second roller changing assembly in the second embodiment of the present application;

[0028] Fig.11 for Fig.10 The enlarged structural diagram at B in the middle;

[0029] Fig.12 This is a schematic diagram of the structure of the second conveying roller and the conversion wheel in the second embodiment of the present application from a front view;

[0030] Fig.13 for Fig.12 A schematic diagram of the structure after the intermediate conversion wheel rotates 180 degrees and two sets of second conveying rollers symmetrically positioned on the horizontal position of the conversion wheel move;

[0031] Fig.14 for Fig.13 Schematic diagram of the structure in which the middle replacement plate is rotated 90 degrees;

[0032] Fig.15 for Fig.14 A schematic diagram of the structure after the third replacement roller moves;

[0033] Fig.16 for Fig.12 A schematic diagram of the structure of the intermediate transfer wheel from the front view;

[0034] Fig.17 for Fig.13 Schematic diagram of the structure in which the second conveying roller on the intermediate transfer wheel moves along the limiting slideway.

[0035] In the figure: 100, annealing furnace body; 101, receiving plate; 200, transmission unit; 10, first conveying roller; 20, second conveying roller; 1, first roller replacement assembly; 11, trigger mechanism; 111, fixed block; 112, trigger plate; 113, first ball; 114, first elastic member; 12, switching assembly; 121, first switching track; 122, first tooth groove; 123, first gear; 124, first replacement roller; 125, first limiting groove; 126, second switching track; 127, second tooth groove; 128, second gear ; 129, second limiting groove; 2, second roller changing assembly; 21, conversion assembly; 211, conversion wheel; 212, connecting plate; 213, second replacement roller; 214, moving column; 215, limiting slide; 22, substitute assembly; 221, replacement plate; 222, slide; 223, avoidance groove; 224, third replacement roller; 23, trigger assembly; 231, support plate; 232, trigger rod; 233, second ball; 234, third elastic member; 3, limiting member; 31, limiting block; 32, limiting track; 33, second elastic member. DETAILED DESCRIPTION

[0036] The embodiment of the present application discloses a reduction annealing furnace for hot-dip galvanizing of strip steel. The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0038] Embodiment 1

[0039] Reference Figure 1-Figure 3A reduction annealing furnace for hot-dip galvanizing of steel strips, comprising an annealing furnace body 100, a feed roller arranged at the feed end of the annealing furnace body 100, and a discharging roller arranged at the discharging end of the annealing furnace body 100, and also comprising a transmission unit 200 arranged in the annealing furnace body 100 for transporting the steel strips in the annealing furnace body 100 and performing annealing and reduction treatments in sequence, the transmission unit 200 comprising first conveying rollers 10 rotatably arranged at the bottom of the annealing furnace body 100 and arranged oppositely, the first conveying rollers 10 are equidistantly arranged in a plurality of groups along the length direction of the annealing furnace body 100, and a second conveying roller 10 is rotatably arranged at the top of the annealing furnace body 100. Conveying rollers 20, and multiple groups of second conveying rollers 20 are equidistantly arranged along the length direction of the annealing furnace body 100, a first roller changing assembly 1 is arranged between two adjacent groups of the first conveying rollers 10 for replacing the first conveying roller 10 when a tumor is generated on the surface during high-temperature conveying, the first roller changing assembly 1 includes a trigger mechanism 11 arranged between two adjacent groups of the first conveying rollers 10 for detecting tumors formed on the surface of the first conveying roller 10 and triggering the start, and a switching assembly 12 is arranged on one side of the trigger mechanism 11 for replacing the first conveying roller 10 with tumors formed on the surface and transferring the first conveying roller 10 with tumors generated;

[0040] The first conveying roller 10 and the second conveying roller 20 can rotate on their own, which belongs to the prior art and will not be described in detail here. On the basis of the first conveying roller 10 and the second conveying roller 20 rotating on their own, the first conveying roller 10 and the second conveying roller 20 can be driven to transfer again;

[0041] The generated nodules refer to the fact that the iron powder, silicon mud and other residues on the surface of the steel strip are oxidized and reduced in the annealing furnace body 100 under the high temperature environment of the first conveyor roller 10 and the second conveyor roller 20, and the nodules are accumulated on the surface of the first conveyor roller 10 and the second conveyor roller 20 to form nodules. After the nodules are formed, the diameters of the first conveyor roller 10 and the second conveyor roller 20 are larger than the normal diameter of the center of the circle, so that in the process of conveying the strip, the surface of the strip is imprinted, resulting in defective or even scrapped products, affecting the quality of the reduction annealing of the strip.

[0042] Reference Figure 3-Figure 9The trigger mechanism 11 includes a fixed block 111 arranged between two adjacent groups of the first conveying rollers 10, and the two sides of the fixed block 111 are respectively installed on the side walls of the reduction furnace body. A receiving plate 101 is also provided between the two groups of the first conveying rollers 10, and the receiving plate 101 is used to receive the collected debris. A trigger plate 112 is movably connected to one side of the first conveying roller 10, and a first ball 113 is provided between the trigger plate 112 and the first conveying roller 10, and the first ball 113 is in tangential contact with the surface of the first conveying roller 10. A first elastic member 114 is fixedly connected between the trigger plate 112 and the fixed block 111, and the first elastic member 114 is preferably a spring. Both sides of the fixed block 111 are provided with a trigger plate 112 for generating a first elastic member on the first conveying roller 10. The pressure sensor is subjected to the pressure brought by the first elastic member 114 after the tumor is formed, so that the pressure sensor transmits an electrical signal. The pressure sensor is not marked in the figure, and a telescopic rod is fixedly connected between the trigger plate 112 and the fixed plate. The first elastic member 114 is sleeved on the outside of the telescopic rod. The telescopic rod can prevent the first elastic member 114 from deforming during use, causing the first ball 113 to be out of tangency with the surface of the first conveyor roller 10, so that the first conveyor roller 10 cannot react sensitively and accurately after the tumor is formed on the surface, thereby affecting the replacement of the first conveyor roller 10 and affecting the quality of the reduction annealing of the strip. Since the reduction furnace is in a high temperature state, the parts used in it are all made of high temperature resistant materials;

[0043] The switching assembly 12 includes a first switching track 121 arranged on both sides of the first conveying roller 10 in the length direction, and a plurality of groups of first tooth grooves 122 are arranged in the length direction of the first switching track 121, and a first gear 123 is meshedly connected in the first tooth groove 122, and the first gear 123 is driven by a first power device and moves along the trajectory of the first switching track 121. The first power device is preferably a motor, and a high-temperature protection cover is provided on the outside of the first power device, so that the first power device can play a high-temperature resistant role in use. The first gear 123 is coaxially connected with a first replacement roller 124 for following the first gear 123 to move along the first tooth groove 122 and replace the tumored first conveying roller 10, and the first gear 123 is symmetrically arranged on both sides of the first switching track 121, and the number of the first replacement rollers 124 matches the number of the first gears 123, because the number of the first conveying rollers 10 is two groups, and any one of the two groups of first conveying rollers 10 is When a surface tumor problem occurs, a single replacement can be achieved, so that the annealing and reduction treatment of the strip steel by the annealing furnace body 100 is not affected, and when the tumor problem occurs in both groups of first conveying rollers 10, they can also be replaced at the same time, so that the treatment of the strip steel in the annealing furnace body 100 can continue, thereby improving the annealing and reduction efficiency of the strip steel. The rear side of the first switching track 121 is fixedly connected with a first limiting groove 125, the first switching track 121 is connected with a second switching track 126, and a plurality of groups of second tooth grooves 127 are provided in the length direction of the second switching track 126, and a limiting member 3 is provided between the first switching track 121 and the second switching track 126, the first conveying roller 10 is coaxially connected with a second gear 128, and the second gear 128 is meshed with the second tooth groove 127, the second gear 128 is driven by a second power device, and the second power device is preferably a motor, and the rear side of the second switching track 126 is fixedly connected with a second limiting groove 129;

[0044] The thickness of the first gear 123 and the first switching track 121 are both smaller than the thickness of the second gear 128 and the second switching track 126, so that when the first gear 123 moves in the first switching track 121, it will not interfere with the second switching track 126, so that the first gear 123 and the second gear 128 do not interfere with each other;

[0045] It should be noted that the first power device and the second power device are respectively provided with a limit plate and a limit groove identical to the first switching track 121 and the second switching track 126 between the annealing furnace body 100, so that the running tracks of the first power device and the second power device are identical to the first switching track 121 and the second switching track 126;

[0046] The limiting member 3 includes a limiting block 31 slidably disposed in the first switching track 121, and a limiting track 32 is formed between the limiting block 31 and the side wall of the second switching track 126 and the second switching track 126. A second elastic member 33 for controlling the extension and contraction of the limiting block 31 to advance the first gear 123 and move the second gear 128 along the track of the second switching track 126 is provided between the annealing furnace body 100 and the limiting block 31. The second elastic member 33 is preferably a spring;

[0047] It should be noted that there are three groups of first conveyor rollers 10, and a trigger assembly 23 and a switching assembly 12 are provided between each group, so that any group of first conveyor rollers 10 can be replaced if there is a problem, thereby not affecting the annealing reduction treatment of the strip steel.

[0048] When any first conveying roller 10 in any group has a tumor on its surface:

[0049] Because the first ball 113 contacts the surface of the first conveying roller 10, when the first ball 113 moves to the tumor position of the first conveying roller 10 (the diameter of the first conveying roller 10 after the tumor is larger than the diameter of the first conveying roller 10 without the tumor), the first ball 113 contacts the tumor position, so that the first ball 113 moves in the direction of compressing the second elastic member 33, so that the telescopic rod contracts, the first elastic member 114 is compressed, and the pressure sensor is subjected to pressure. After the pressure sensor is subjected to pressure, the electrical signal is transmitted to the controller, and the controller can control the corresponding first power device and the second power device to start. If the left side of the fixed block 111 is subjected to pressure, the first power device on the left side is controlled to start and run to the position of the first conveying roller 10 on the left side, and the first conveying roller 10 on the left side with the tumor is driven by the second power device to move to a position away from the original first conveying roller 10, thereby avoiding interference;

[0050] Reference Figure 6-Figure 9First, the first power device and the second power device are started together, the first power device drives the first gear 123 to mesh with the first tooth groove 122 and move along the first switching track 121, so that the first gear 123 moves along the first switching track 121 with the first replacement roller 124, and at the same time, the second power device drives the second gear 128 to mesh with the second tooth groove 127, so that the second gear 128 moves along the second switching track 126 with the first conveying roller 10, and the second gear 128 is limited by the limiting track 32, so that the second gear 128 can move along the second switching track 126 with the first conveying roller 10. The second switching track 126 moves until it moves to the end of the second switching track 126, and the first gear 123 gradually contacts the limit block 31 when moving toward the original first conveying roller 10, and squeezes the second elastic member 33, so that the limit block 31 releases the blocking effect on the first gear 123, until the first gear 123 moves with the first replacement roller 124 to a position tangent to the strip steel, that is, the first replacement roller 124 replaces the original first conveying roller 10, and the limit block 31 is extended into the first switching track 121 again under the action of the elastic restoring force of the second elastic member 33;

[0051] The second gear 128 moves the first conveyor roller 10 to the end position of the second switching track 126, which can not only prevent interference with the first replacement roller 124 but also keep it away from the original position of the first conveyor roller 10, so that when the first replacement roller 124 that replaces the first conveyor roller 10 continues to convey the strip, it will not interfere with the first conveyor roller 10 after the tumor is formed, and due to the setting of the first limiting groove 125 and the second limiting groove 129, the first replacement roller 124 and the first conveyor roller 10 can move more smoothly in the first switching track 121 and the second switching track 126.

[0052] When any two first conveying rollers 10 in any group have surface tumors:

[0053] Because the first balls 113 are elastically provided on both sides of the fixed block 111, when the two groups of first balls 113 are subjected to the force of squeezing the first elastic member 114, that is, the surfaces of the first conveying rollers 10 of the two adjacent groups are both tumor-like, the first power device and the second power device on both sides can be controlled to start at the same time, and after starting, the first replacement rollers 124 are respectively moved toward each other, that is, the first gear 123 brings the first replacement rollers 124 to move toward the position of the first conveying roller 10, and at the same time, the first conveying roller 10 with the tumor follows the second gear 128 and moves along the track of the second switching track 126, so that the first conveying roller 10 moves in the direction away from the conveying strip until it is separated from the strip, so that the first replacement roller 124 replaces the original position of the first conveying roller 10 and continues to convey the strip, and the first conveying roller 10 with the tumor can be moved to not contact the strip;

[0054] And the first replacement roller 124 is always in a position close to the first conveyor roller 10, so the temperature of the first replacement roller 124 is the same as the temperature of the first conveyor roller 10, which meets the requirements of conveying the steel strip. It can solve the tedious process of closing the annealing furnace body 100 after a tumor forms on the surface of the first conveyor roller 10, then checking which conveyor roller has a problem, and then replacing the conveyor roller, and raising the temperature of the replaced conveyor roller to the temperature required for conveying the steel strip. This not only saves the time of replacing the conveyor roller, but also effectively improves the efficiency of the annealing reduction treatment of the steel strip.

[0055] Embodiment 2

[0056] Reference Figure 1-Figure 2 , Figure 10-11 and Fig.15 A second roller changing assembly 2 is provided between the second conveying roller 20 and the annealing furnace body 100, which is used to replace the second conveying roller 20 when a tumor is generated on the surface thereof during conveying at high temperature. The second roller changing assembly 2 includes a conversion assembly 21 connected to the second conveying roller 20 and used to rotate the second conveying roller 20 with the tumor away from the strip steel. The conversion assembly 21 is connected to a substitute assembly 22 for replacing the second conveying roller 20 with the tumor and allowing the strip steel to continue to be conveyed under the action of the substitute assembly 22. A trigger assembly 23 for controlling the conversion assembly 21 and the replacement assembly to start is provided on one side of the second conveying roller 20;

[0057] The second conveying roller 20 can also rotate by itself, and transmits the strip steel to move by rotating, which belongs to the prior art and will not be described in detail here;

[0058] The conversion assembly 21 includes a conversion wheel 211 connected to the second conveying roller 20, and the conversion wheel 211 is provided with a plurality of connecting plates 212 along its circumferential direction, and the connecting plates 212 are coaxially connected to the second conveying roller 20, the number of the connecting plates 212 is greater than the number of the second conveying rollers 20, the conversion wheel 211 is driven by a third power device, and the third power device is preferably a motor, and the connecting plate 212 is also provided with a second replacement roller 213 for rotating the second conveying roller 20 with a tumor by 180 degrees following the conversion wheel 211 so that the second replacement roller 213 replaces the second conveying roller 20 to convey the strip steel;

[0059] Reference Figure 12-Figure 17The conversion assembly 21 further includes a moving column 214, and the moving column 214 is provided with two groups. The moving column 214 is respectively arranged on two groups of second conveying rollers 20 symmetrically and horizontally, and the moving column 214 is driven by a fourth power device, and the fourth power device is preferably a telescopic rod. A limited slideway 215 is provided on the connecting plate 212 symmetrically arranged at the horizontal position of the conversion wheel 211, and the limited slideway 215 matches the diameter of the moving column 214. The fourth power device drives the moving column 214 to move along the limited slideway 215, so that the second conveying rollers 20 located at both ends of the diameter of the conversion wheel 211 move toward each other toward the center of the circle;

[0060] The trigger assembly 23 includes a support plate 231 disposed between two adjacent groups of the connecting plates 212, a trigger rod 232 is disposed on both sides of the support plate 231, and a second ball 233 is rollingly connected between the trigger rod 232 and the second conveying roller 20, and a third elastic member 234 is fixedly connected between the trigger rod 232 and the support plate 231, and the third elastic member 234 is preferably a spring;

[0061] The replacement assembly 22 includes a replacement plate 221 rotatably arranged on the conversion wheel 211, and the replacement plate 221 is in a vertical state with the bottom of the annealing furnace body 100, and the replacement plate 221 is driven by a fifth power device, and the fifth power device is preferably a motor, and a slide groove 222 is provided on the replacement plate 221, and a side of the replacement plate 221 close to the slide groove 222 is provided with an avoidance groove 223 for avoiding the moving column 214, and third replacement rollers 224 are rotatably arranged at both ends of the replacement plate 221, and the third replacement rollers 224 are located inside the slide groove 222;

[0062] It should be noted that the second conveying roller 20 can also rotate on its own, and the operation is the same as the first conveying roller 10 described above, and the conversion wheel 211 is only used to rotate the position of the second conveying roller 20 to exchange the position;

[0063] The second conveying roller 20 and the conversion wheel 211 are both provided with multiple groups along the length direction of the annealing furnace body 100, which can be used to convey the strip steel and complete the annealing reduction process, and the second conveying roller 20 is arranged along the circumferential direction of the conversion wheel 211, which can not only support the strip steel for conveying, but also realize uniform high-temperature treatment of the strip steel, and the second replacement roller 213 and the third replacement roller 224 are both in the same environment, which can also help to keep the temperature similar when replacing the second conveying roller 20, so as not to affect the re-conveying of the strip steel;

[0064] Here is an example of a case where any one of the second conveying rollers 20 in any group has a tumor problem:

[0065] The plurality of groups of second balls 233 are in contact with the outer wall of the second conveying roller 20 respectively. When a tumor appears on the outer wall of the second conveying roller 20, the diameter of the second conveying roller 20 becomes larger, so that the second balls 233 are moved in the direction of squeezing the third elastic member 234, thereby squeezing the trigger rod 232. After squeezing, the third power device is started, driving the conversion wheel 211 to rotate 180 degrees, and rotating the second conveying roller 20 originally located at the top to the bottom, so that the second conveying roller 20 is rotated until it is not in contact with the strip steel, and the second replacement roller 213 originally located at the bottom is rotated 180 degrees and rotated to the top of the conversion wheel 211 and contacts the strip steel. In the process of the rotation of the conversion wheel 211, the second conveying roller 20 and the second replacement roller 213 are always in contact with the strip steel, so that they can also play a supporting role for the strip steel during the conversion process, and do not affect the conveying of the strip steel;

[0066] After the conversion is completed, the positions of the two groups of second conveying rollers 20 originally located at the horizontal position of the conversion wheel 211 do not change. At this time, the fourth power device is started, driving the moving column 214 to move along the limiting slide 215, that is, driving the second conveying roller 20 to move toward the center of the circle, so that the two groups of second conveying rollers 20 located in the horizontal direction are separated from the strip steel, and at the same time, the replacement plate 221 is driven by the fifth power device to rotate 90 degrees, from the original vertical state to the horizontal state. During the rotation process, the avoidance groove 223 can avoid the moving column 214, thereby causing interference problems. After the horizontal state, the third replacement roller 224 is controlled to move in the slide groove 222, that is, to move in the direction away from the center of the circle. The way the third replacement roller 224 moves in the slide groove 222 is the same as the way the second conveying roller 20 moves, which is not marked in the figure, until the second conveying roller 20 position in the horizontal position is replaced, thereby completing the replacement of the entire second conveying roller 20;

[0067] Similarly, no matter which second conveying roller 20 in a group has a nodule problem, the second replacement roller 213 and the third replacement roller 224 will replace all the second conveying rollers 20 in the group so as not to affect the conveying and annealing reduction treatment of the strip.

[0068] How this application works:

[0069] When any first conveying roller 10 in any group has a tumor on its surface:

[0070] The first ball 113 contacts the surface of the first conveying roller 10, and the tumorous part contacts the first ball 113, so that the first ball 113 moves in the direction of compressing the second elastic member 33, so that the telescopic rod contracts, and the first elastic member 114 is compressed, so that the first power device and the second power device are started, so that the first gear 123 moves the first replacement roller 124 along the first switching track 121, and at the same time, the second gear 128 moves the first conveying roller 10 along the second switching track 126, so that the first replacement roller 124 replaces the original first conveying roller 10 and continues to convey the strip steel, and the first conveying roller 10 moves to the end of the second switching track 126;

[0071] When any two first conveying rollers 10 in any group have surface tumors:

[0072] The two groups of first balls 113 are both subjected to the force to squeeze the first elastic member 114, and the first power device and the second power device on both sides can be controlled to start at the same time, and after starting, the first replacement rollers 124 are respectively moved toward each other until they move to the position of the original first conveying roller 10 and replace the first conveying roller 10 to convey the strip steel, and the first conveying roller 10 moves toward the second switching track 126 together to complete the replacement;

[0073] When any second conveying roller 20 in any group has a tumor problem:

[0074] The second ball 233 contacts the outer wall of the second conveying roller 20, and the second ball 233 is subjected to the force of squeezing the third elastic member 234, starting the third power device, driving the conversion wheel 211 to rotate 180 degrees, so that the second replacement roller 213 replaces the second conveying roller 20, and the second conveying roller 20 located at the horizontal position of the conversion roller moves toward each other along the limiting slide 215 (towards the center of the conversion wheel 211). After the movement is completed, the replacement plate 221 rotates 90 degrees, so that the third replacement roller 224 is transferred to the horizontal position of the conversion wheel 211, and the third replacement roller 224 moves in the opposite direction until it moves to be tangent to the strip, thereby continuing the conveying of the strip.

[0075] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0076] What has been described above is only a preferred specific implementation manner of the embodiments of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present application within the technical scope disclosed in the present application, which should be covered by the protection scope of the present application.

Claims

1. A reduction annealing furnace for hot-dip galvanizing of steel strips, comprising an annealing furnace body (100), a feed roller arranged at a feed end of the annealing furnace body (100), and a discharge roller arranged at a discharge end of the annealing furnace body (100), characterized in that: Also includes: The transmission unit (200) is arranged in the annealing furnace body (100) and is used to transport the steel strip in the annealing furnace body (100) and perform annealing and reduction treatment in sequence; The transmission unit (200) comprises: First conveying rollers (10) are arranged at the bottom of the annealing furnace body (100) and are arranged opposite to each other. A plurality of first conveying rollers (10) are arranged in equal intervals along the length direction of the annealing furnace body (100); Second conveying rollers (20) are arranged on the top of the annealing furnace body (100), and a plurality of groups of second conveying rollers (20) are arranged at equal intervals along the length direction of the annealing furnace body (100); A first roller replacement assembly (1) is arranged between two adjacent groups of the first conveying rollers (10) and is used to replace the first conveying rollers (10) when nodules are formed on the surface thereof during high-temperature conveying; A second roller replacement assembly (2) is arranged between the second conveying roller (20) and the annealing furnace body (100) and is used to replace the second conveying roller (20) when nodules are generated on the surface thereof during conveying at high temperature; The first roller changing assembly (1) comprises: A trigger mechanism (11) is disposed between two adjacent groups of the first conveying rollers (10) and is used to detect the formation of tumors on the surface of the first conveying rollers (10) and trigger the start; A switching assembly (12) is arranged on one side of the trigger mechanism (11) and is used to replace the first conveying roller (10) with a tumor formed on the surface and to transfer the first conveying roller (10) with the tumor formed on the surface; The second roller changing assembly (2) comprises: A conversion assembly (21) is connected to the second conveying roller (20) and is used to move the second conveying roller (20) with a tumor away from the strip by rotating; A substitute component (22) is connected to the conversion component (21) and is used to replace the second conveying roller (20) with a tumor and allow the strip to continue to be conveyed under the action of the substitute component (22); A trigger assembly (23), arranged on one side of the second conveying roller (20), for controlling the start-up of the conversion assembly (21) and the replacement assembly; The conversion component (21) comprises: A conversion wheel (211) is connected to the second conveying roller (20), and the conversion wheel (211) is provided with a plurality of groups of connecting plates (212) along its circumferential direction, and the connecting plates (212) are coaxially connected to the second conveying roller (20), the number of the connecting plates (212) is greater than the number of the second conveying roller (20), and the conversion wheel (211) is driven by a third power device; A second replacement roller (213) is arranged on the connecting plate (212) and is used to rotate the second conveying roller (20) with a tumor by 180 degrees by following the conversion wheel (211) so that the second replacement roller (213) replaces the second conveying roller (20) to convey the strip steel; The conversion component (21) further comprises: The movable columns (214) are provided with two groups, which are respectively arranged on two groups of second conveying rollers (20) at symmetrical and horizontal positions, and the movable columns (214) are driven by a fourth power device; A limiting slideway (215) is provided on a connecting plate (212) symmetrically arranged at a horizontal position of the conversion wheel (211), and the limiting slideway (215) matches the diameter of the moving column (214); The fourth power device drives the moving column (214) to move along the limiting slideway (215), so that the second conveying rollers (20) located at both ends of the diameter of the conversion wheel (211) move towards each other in the direction of the center of the circle; The trigger component (23) comprises: A support plate (231) is disposed between two adjacent groups of the connecting plates (212); A trigger rod (232) is arranged on both sides of the support plate (231), and a second ball (233) is arranged between the trigger rod (232) and the second conveying roller (20); A third elastic member (234) is disposed between the trigger rod (232) and the support plate (231); A replacement plate (221) is rotatably disposed on the conversion wheel (211), and the replacement plate (221) and the bottom of the annealing furnace body (100) are in a vertical state, the replacement plate (221) is driven by a fifth power device, a slide groove (222) is provided on the replacement plate (221), and an avoidance groove (223) for avoiding the moving column (214) is provided on one side of the replacement plate (221) close to the slide groove (222); The third replacement roller (224) is respectively arranged at two ends of the replacement plate (221), and the third replacement roller (224) is located inside the slide groove (222).

2. A reduction annealing furnace for hot-dip galvanizing of steel strip according to claim 1, characterized in that: The trigger mechanism (11) comprises: A fixed block (111) is arranged between two adjacent groups of the first conveying rollers (10); A trigger plate (112) is arranged on one side of the first conveying roller (10), and a first rolling ball (113) is arranged between the trigger plate (112) and the first conveying roller (10); The first elastic member (114) is arranged between the trigger plate (112) and the fixing block (111).

3. A reduction annealing furnace for hot-dip galvanizing of steel strip according to claim 1, characterized in that: The switching component (12) comprises: A first switching track (121) is arranged on both sides of the first conveying roller (10) in the length direction, and a plurality of first tooth grooves (122) are arranged in the length direction of the first switching track (121), and a first gear (123) is meshedly connected in the first tooth groove (122), and the first gear (123) is driven by a first power device and moves along the track of the first switching track (121); A first replacement roller (124) is coaxially connected to the first gear (123) and is used to follow the first gear (123) to move along the first tooth groove (122) and replace the first conveying roller (10) with a tumor; A first limiting groove (125) is provided on the rear side of the first switching track (121); A second switching track (126) is connected to the first switching track (121), and a plurality of second tooth grooves (127) are provided in the length direction of the second switching track (126), and a stopper (3) is provided between the first switching track (121) and the second switching track (126); A second gear (128) is coaxially connected to the first conveying roller (10), and the second gear (128) is meshedly connected to the second tooth groove (127), and the second gear (128) is driven by a second power device; The second limiting groove (129) is arranged on the rear side of the second switching track (126).

4. A reduction annealing furnace for hot-dip galvanizing of steel strip according to claim 3, characterized in that: The limiting member (3) comprises: A limit block (31) is disposed in the first switching track (121), and a limit track (32) is formed between the side wall of the limit block (31) close to the second switching track (126) and the second switching track (126); The second elastic member (33) is disposed between the annealing furnace body (100) and the limit block (31) and is used to control the limit block (31) to extend and retract so that the first gear (123) moves forward and the second gear (128) moves along the track of the second switching track (126).

5. A reduction annealing furnace for hot-dip galvanizing of steel strip according to claim 3, characterized in that: A receiving plate (101) is also provided between the two groups of the first conveying rollers (10), and the receiving plate (101) is used for receiving the collected debris.

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