Horizontal continuous annealing furnace threading device and threading method

Abstract

The application discloses a horizontal continuous annealing furnace threading device and a threading method, and particularly relates to the technical field of annealing furnace threading devices. The outer surface of the screw rod is threadedly connected with a threaded ring. The outer surface of the threaded ring is fixedly connected with a sliding rod. The inside of the furnace body is provided with a sliding groove. The two ends of the sliding rod are slidably arranged in the inner walls of the rectangular grooves on one side of the outer surfaces of the two semicircular covers. The two ends of the sliding rod are respectively provided with clamping devices. When threading is needed due to a broken strip in the furnace body, the motor is operated to control the rotation of the screw rod, the positions of the sliding rod and the two groove blocks at the two ends of the sliding rod are adjusted, the sliding rod is located at one end of the furnace body, the two sides of the strip steel are fixed by the clamping blocks on the outer surfaces of the groove blocks, the motor is operated again to control the rotation of the screw rod, the sliding rod and the strip steel are moved to the other end of the furnace body, and the threading is completed. The time required for threading is saved, and the efficiency of the annealing furnace during use is improved.

Description

Technical Field

[0001] This invention relates to the technical field of annealing furnace threading devices, and in particular to a horizontal continuous annealing furnace threading device and threading method. Background Technology

[0002] Continuous annealing furnaces are the most important equipment in silicon steel production lines. In production applications, continuous annealing is widely used. Continuous annealing transforms deformed grains back into uniform equiaxed grains, while eliminating work hardening and residual internal stress. It is a heat treatment process that restores the microstructure and properties of steel to their state before cold deformation.

[0003] After a strip breakage accident during production line startup or in a horizontal annealing furnace, it is necessary to thread the strip inside the furnace. Usually, it is necessary to wait for the furnace temperature to drop before manually threading the broken strip. The time spent waiting for the furnace temperature to drop is relatively long, which affects the efficiency of the annealing furnace operation. Summary of the Invention

[0004] This invention addresses the problem that after a strip breakage accident during production line startup or in a horizontal annealing furnace, strip threading is required in the furnace. This process typically involves waiting for the furnace temperature to drop before manually threading the broken strip, which is time-consuming and affects the efficiency of the annealing furnace. The invention provides a strip threading device and method for a horizontal continuous annealing furnace.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a belt-threading device for a horizontal continuous annealing furnace, comprising a motor, a furnace body disposed on one side of the motor, a traction device disposed on the outer surface of the furnace body, the traction device comprising a positioning plate, one side of the positioning plate being fixedly connected to one side of the furnace body, the motor being located on the outer surface of the positioning plate, a first pulley being fixedly connected to the output end of the motor, a belt being disposed on the outer surface of the first pulley, a rotating shaft being rotatably connected to one side of the positioning plate, a second pulley being fixedly connected to the outer surface of the rotating shaft, and a first gear being fixedly connected to the end of the rotating shaft away from the positioning plate. The outer surface of the first gear is meshed with a second gear, and one end of the second gear is fixedly connected to a screw. Semicircular covers are fixedly connected to both sides of the inner wall of the furnace body. A rectangular groove is opened on one side of the outer surface of the semicircular cover. The outer surface of the screw rotates on the inner wall of one semicircular cover. A threaded ring is threaded to the outer surface of the screw. A sliding rod is fixedly connected to the outer surface of the threaded ring. A sliding groove is opened inside the furnace body. The outer surface of the sliding rod slides on the inner wall of the sliding groove. The two ends of the sliding rod slide on the inner walls of the rectangular grooves on one side of the outer surface of the two semicircular covers. Clamping devices are respectively provided at the two ends of the sliding rod.

[0006] The aforementioned components achieve the following effects: By setting up a traction device, when the strip breaks during the annealing process and needs to be threaded, the motor can rotate forward through its output end, driving the first pulley to rotate. This, in turn, drives the shaft and the first gear to rotate via the belt and the second pulley. The first gear then drives the second gear and the screw to rotate, causing the threaded ring on the outer surface of the screw to move. This causes the sliding rod to slide along the inner wall of the slide groove and the inner wall of the rectangular groove, moving the clamping devices at both ends of the sliding rod to one end of the furnace body. The steel strip is then fixed by the clamping devices. Then, the motor rotates in the opposite direction through its output end, driving the screw to rotate. This causes the sliding rod to move the steel strip fixed by the clamping devices to the other end of the furnace body for threading the steel strip, saving the time required for threading and improving the efficiency of the annealing furnace.

[0007] Preferably, the semicircular cover and clamping device are made of high-temperature resistant material, and the motor is located on the outer surface of the positioning plate.

[0008] The effects achieved by the above components are as follows: by setting the semicircular cover to be made of high temperature resistant material, the semicircular cover can withstand the high temperature inside the furnace as much as possible and is not easily deformed; by setting the motor on the outer surface of the positioning plate, the motor is far away from the furnace body, minimizing the impact of the high temperature of the furnace body on the motor and preventing it from failing to operate normally.

[0009] Preferably, a positioning ring is fixedly connected to one side of the inner wall of one of the semicircular covers, and the end of the screw away from the second gear rotates on the inner wall of the positioning ring.

[0010] The effect achieved by the above components is that when the screw rotates, the end away from the second gear will rotate on the inner wall of the positioning ring. The positioning ring can limit the angle of the two ends of the screw as much as possible to avoid the angle of the screw from deviating and causing the sliding rod to be unable to move normally.

[0011] Preferably, a positioning rod is fixedly connected to the outer surface of the furnace body near the rotating shaft, and the end of the outer surface of the rotating shaft near the second gear rotates on the inner wall of the positioning rod.

[0012] The effect achieved by the above components is that by setting the positioning rod, the angle between the rotating shaft and the positioning plate can be limited as much as possible to avoid the angle deviation when the rotating shaft rotates and increase the stability when the rotating shaft rotates.

[0013] Preferably, the clamping device includes a groove block, one side of which is fixedly connected to one end of a sliding rod. A groove is formed on the outer surface of the groove block. Two round rods are slidably connected to the inner wall of the groove block. Clamping blocks are fixedly connected to the outer surfaces of the two round rods at their close ends. One side of the two clamping blocks slides on the inner wall of the groove. A cylinder is fixedly connected to the upper and lower ends of the outer surface of the groove block. The outer surface of the round rod slides on the inner wall of the cylinder. A spring is provided at the top end of the round rod. The upper and lower ends of the spring are fixedly connected to one end of the round rod and the inner wall of the cylinder away from the groove block, respectively.

[0014] The effect achieved by the above components is as follows: when the sliding rod drives the two slot blocks to one end of the furnace body, the two sides of the strip steel are respectively inserted between the two clamping blocks on the outer surface of the two slot blocks. When the strip steel is inserted between the two clamping blocks, it will push the two clamping blocks away from each other, causing the two round rods to slide in opposite directions on the inner walls of the slot blocks and cylinders and compress the springs inside the two cylinders respectively. When part of the strip steel is located between the two clamping blocks, the two springs will return to their original state and push the two round rods to move in the same direction respectively, pressing the side of the two clamping blocks that are close to each other onto the outer surface of the strip steel, thus clamping and fixing the strip steel on the outer surface of the slot blocks.

[0015] Preferably, the outer surfaces of the two clamping blocks are arc-shaped at the edge furthest from the slot block.

[0016] The effect achieved by the above-mentioned components is that by setting one edge of the outer surface of the two clamping blocks, it is easier for the user to insert the strip steel between the two clamping blocks from the curved side of the edge of the two clamping blocks.

[0017] Preferably, a plurality of rectangular strips are fixedly connected to one side of the clamping block, and the rectangular strips are linearly distributed on one side of the outer surface of the clamping block.

[0018] The effect achieved by the above components is that by setting rectangular bars, the friction between the outer surface of the strip and the outer surface of the clamping block can be increased, making it less likely for the strip to slip and fall when it is located between the two clamping blocks.

[0019] Preferably, a central rod is fixedly connected to one side of the inner wall of the cylinder, the central rod is located on the inner wall of the spring, and the inner wall of the cylinder slides on the outer surface of the central rod.

[0020] The effects achieved by the above components are as follows: by setting the central rod inside the spring, the internal shape of the spring can be fixed as much as possible to avoid the spring from deforming laterally and becoming unusable. When the round rod moves inside the cylinder, it will slide on the outer surface of the central rod. The angle between the round rod and the cylinder is further restricted by the central rod, which increases the stability of the round rod when it moves.

[0021] Preferably, two semicircular blocks are fixedly connected to one side of the groove block, and the two semicircular blocks, on the side away from the groove block, slide on the outer surface of the semicircular cover.

[0022] The effect achieved by the above components is that when the slot block is moved by the sliding rod, one side of the two semicircular blocks will slide on the outer surface of the semicircular cover, further limiting the angle between the slot block and the semicircular cover and minimizing the shaking of the slot block when it moves.

[0023] Preferably, it also includes a threading method for a horizontal continuous annealing furnace threading device, comprising the following steps: S1. The motor rotates forward through its output end, driving the first pulley to rotate. The belt and the second pulley drive the shaft and the first gear to rotate. The first gear drives the second gear and the screw to rotate, causing the threaded ring on the outer surface of the screw to move on the surface of the screw. This causes the sliding rod to slide on the inner wall of the slide groove and the inner wall of the rectangular groove, moving the groove blocks at both ends of the sliding rod to one end of the furnace body. S2. Insert both sides of the strip steel into the two clamping blocks on the outer surface of the two slot blocks respectively. When part of the strip steel is located between the two clamping blocks, the two springs will return to their original state and push the two round rods to move in the same direction. Press the side of the two clamping blocks that are close to each other onto the outer surface of the strip steel to clamp and fix the strip steel in the position on the outer surface of the slot blocks. S3. The operating motor rotates in the opposite direction through the motor's output end, driving the screw to rotate, which in turn causes the sliding rod to move the steel strip fixed on the outer surface of the slot block to the other end of the furnace body to thread the steel strip.

[0024] In summary, the beneficial effects of the present invention are as follows: By setting up a traction device and a clamping device, when the strip breaks inside the furnace and needs to be threaded, the operating motor controls the screw to rotate and adjust the position of the sliding rod and the two slot blocks at both ends of the sliding rod so that the sliding rod is located at one end of the furnace. Then, the two sides of the strip are fixed by the clamps on the outer surface of the slot blocks. Then, the operating motor controls the screw to rotate and drive the sliding rod and the strip to the other end of the furnace to complete the threading. This saves the time required for threading and improves the efficiency of the annealing furnace. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the furnace body of the present invention; Figure 3 This is the present invention. Figure 2 A magnified three-dimensional structural diagram of part A; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of the furnace body of the present invention; Figure 5 This is a three-dimensional structural diagram of the screw of the present invention; Figure 6 This is a three-dimensional structural diagram of the sliding rod of the present invention; Figure 7 This is a partial cross-sectional three-dimensional structural schematic diagram of the cylinder of the present invention; Figure 8 This is a three-dimensional structural diagram of the clamping block of the present invention; Figure 9 This is a three-dimensional structural diagram of the round rod of the present invention; Figure 10 This is a three-dimensional structural diagram of the central rod of the present invention.

[0026] Explanation of reference numerals in the attached figures: 1. Motor; 2. Traction device; 3. Clamping device; 4. Furnace body; 21. Positioning plate; 22. First pulley; 23. Belt; 24. Rotating shaft; 25. Second pulley; 26. First gear; 27. Second gear; 28. Screw; 29. ​​Slide groove; 210. Sliding rod; 211. Threaded ring; 212. Semicircular cover; 213. Rectangular groove; 214. Positioning ring; 215. Positioning rod; 31. Groove block; 32. Groove; 33. Round rod; 34. Cylinder; 35. Spring; 36. Center rod; 37. Clamping block; 38. Rectangular strip; 39. Semicircular block. Detailed Implementation

[0027] Reference Figure 1-6As shown, this embodiment discloses a belt threading device and method for a horizontal continuous annealing furnace, including a motor 1, a furnace body 4 disposed on one side of the motor 1, a traction device 2 disposed on the outer surface of the furnace body 4, the traction device 2 including a positioning plate 21, one side of the positioning plate 21 being fixedly connected to one side of the furnace body 4, the motor 1 being located on the outer surface of the positioning plate 21, a first pulley 22 being fixedly connected to the output end of the motor 1, a belt 23 being disposed on the outer surface of the first pulley 22, a rotating shaft 24 being rotatably connected to one side of the positioning plate 21, and a second pulley 25 being fixedly connected to the outer surface of the rotating shaft 24. A first gear 26 is fixedly connected to the end of the rotating shaft 24 away from the positioning plate 21. A second gear 27 is meshed with the outer surface of the first gear 26. A screw 28 is fixedly connected to one end of the second gear 27. Semicircular covers 212 are fixedly connected to both sides of the inner wall of the furnace body 4. A rectangular groove 213 is opened on one side of the outer surface of the semicircular cover 212. The outer surface of the screw 28 rotates on the inner wall of the semicircular cover 212. A threaded ring 211 is threadedly connected to the outer surface of the screw 28. A sliding rod 210 is fixedly connected to the outer surface of the threaded ring 211. The interior of the furnace body 4 has... The outer surface of the sliding rod 210 slides on the inner wall of the sliding groove 29. Both ends of the sliding rod 210 slide on the inner wall of a rectangular groove 213 located on one side of the outer surface of each of the two semi-circular covers 212. Clamping devices 3 are provided at both ends of the sliding rod 210. By providing the traction device 2, when the tape breaks during annealing and needs to be re-threaded, the motor 1 can rotate forward through its output end, driving the first pulley 22 to rotate. This rotation, via the belt 23 and the second pulley 25, drives the rotating shaft 24 and the first gear 26 to rotate. The first gear 26 then drives the second gear 27. The screw 28 rotates, causing the threaded ring 211 on the outer surface of the screw 28 to move on the surface of the screw 28, which in turn causes the sliding rod 210 to slide on the inner wall of the slide groove 29 and the inner wall of the rectangular groove 213. The clamping devices 3 at both ends of the sliding rod 210 are moved to one end of the furnace body 4, and the steel strip is fixed by the clamping devices 3. Then the motor 1 is operated to rotate in the opposite direction through the output end of the motor 1, which drives the screw 28 to rotate, causing the sliding rod 210 to move the steel strip fixed by the clamping devices 3 to the other end of the furnace body 4 for threading the steel strip, saving the time required for threading and improving the efficiency of the annealing furnace.

[0028] Reference Figure 1-10As shown, this embodiment discloses that the semicircular cover 212 and the clamping device 3 are made of high-temperature resistant material. The motor 1 is located on the outer surface of the positioning plate 21. By making the semicircular cover 212 of high-temperature resistant material, the semicircular cover 212 can withstand the high temperature inside the furnace body 4 as much as possible and is not easily deformed. By setting the motor 1 on the outer surface of the positioning plate 21, the motor 1 is far away from the furnace body 4, minimizing the impact of the high temperature of the furnace body 4 on the motor 1, which may cause it to malfunction. A positioning ring 214 is fixedly connected to one side of the inner wall of the semicircular cover 212. The end of the screw 28 away from the second gear 27 rotates on the inner wall of the positioning ring 214. When in motion, the end away from the second gear 27 will rotate on the inner wall of the positioning ring 214. The positioning ring 214 can limit the angle of both ends of the screw 28 as much as possible to avoid the angle of the screw 28 being deflected, which would prevent the sliding rod 210 from moving normally. A positioning rod 215 is fixedly connected to the side of the outer surface of the furnace body 4 near the rotating shaft 24. The end of the outer surface of the rotating shaft 24 near the second gear 27 rotates on the inner wall of the positioning rod 215. By setting the positioning rod 215, the angle between the rotating shaft 24 and the positioning plate 21 can be limited as much as possible to avoid the angle of the rotating shaft 24 being deflected when rotating, and to increase the stability of the rotating shaft 24 when rotating.

[0029] Reference Figure 1-10 As shown, this embodiment discloses a clamping device 3 including a groove block 31. One side of the groove block 31 is fixedly connected to one end of a sliding rod 210. A groove 32 is formed on the outer surface of the groove block 31. Two round rods 33 are slidably connected to the inner wall of the groove block 31. Clamping blocks 37 are fixedly connected to the ends of the outer surfaces of the two round rods 33 that are close to each other. One side of the two clamping blocks 37 slides on the inner wall of the groove 32. Cylinders 34 are fixedly connected to the upper and lower ends of the outer surface of the groove block 31. The outer surfaces of the round rods 33 slide on the inner wall of the cylinders 34. A spring 35 is provided at the top of the round rods 33. The upper and lower ends of the spring 35 are respectively connected to one end of the round rod 33 and the inner wall of the cylinder 34 away from the groove block 31. In a fixed connection, when the sliding rod 210 moves the two slot blocks 31 to one end of the furnace body 4, the two sides of the strip steel are respectively inserted between the two clamping blocks 37 on the outer surface of the two slot blocks 31. When the strip steel is inserted between the two clamping blocks 37, it will push the two clamping blocks 37 away from each other, causing the two round rods 33 to slide in opposite directions on the inner walls of the slot blocks 31 and the cylinder 34, and compress the springs 35 inside the two cylinders 34 respectively. When part of the strip steel is located between the two clamping blocks 37, the two springs 35 will return to their original state and push the two round rods 33 to move in the same direction, pressing the side of the two clamping blocks 37 that is close to each other onto the outer surface of the strip steel, thus clamping and fixing the position of the strip steel on the outer surface of the slot blocks 31.

[0030] Reference Figure 1-10As shown, this embodiment discloses that the outer surfaces of the two clamping blocks 37 are arc-shaped at the edges away from the groove block 31. By setting the outer surfaces of the two clamping blocks 37 at one edge, it is easier for the user to insert the strip steel between the two clamping blocks 37 from the arc-shaped edge. Several rectangular strips 38 are fixedly connected to one side of the clamping block 37. The rectangular strips 38 are linearly distributed on one side of the outer surface of the clamping block 37. By setting the rectangular strips 38, the friction between the outer surface of the strip steel and the outer surface of the clamping block 37 can be increased, making it less likely for the strip steel to slip and fall when it is between the two clamping blocks 37.

[0031] Reference Figure 1-10 As shown, this embodiment discloses a central rod 36 fixedly connected to one side of the inner wall of the cylinder 34. The central rod 36 is located on the inner wall of the spring 35. The inner wall of the round rod 33 slides on the outer surface of the central rod 36. By setting the central rod 36 inside the spring 35, the internal shape of the spring 35 can be fixed as much as possible to avoid the spring 35 from undergoing lateral deformation and becoming unusable. When the round rod 33 moves inside the cylinder 34, it will slide on the outer surface of the central rod 36. The central rod 36 further restricts the angle between the round rod 33 and the cylinder 34, increasing the stability of the round rod 33 when it moves. Two semicircular blocks 39 are fixedly connected to one side of the groove block 31. The side of the two semicircular blocks 39 away from the groove block 31 slides on the outer surface of the semicircular cover 212. When the groove block 31 is moved by the sliding rod 210, the side of the two semicircular blocks 39 will slide on the outer surface of the semicircular cover 212, further restricting the angle between the groove block 31 and the semicircular cover 212 to avoid the groove block 31 from shaking when it moves.

[0032] The working principle is as follows: When a strip breaks inside the furnace body 4 and needs to be re-threaded, the operating motor 1 rotates forward through its output end, driving the first pulley 22 to rotate. This rotation, via the belt 23 and the second pulley 25, drives the rotating shaft 24 and the first gear 26 to rotate. The first gear 26 then drives the second gear 27 and the screw 28 to rotate, causing the threaded ring 211 on the outer surface of the screw 28 to move. This causes the sliding rod 210 to slide along the inner wall of the groove 29 and the inner wall of the rectangular groove 213, moving the slot blocks 31 at both ends of the sliding rod 210 to one end of the furnace body 4. Subsequently, the two sides of the strip are inserted between the two clamping blocks 37 on the outer surface of the two slot blocks 31. When part of the strip is located between the two clamping blocks 37, the two springs 35 return to their original state and push the two round rods 33 to move in the same direction, pressing the side of the two clamping blocks 37 that is close to each other onto the strip. The outer surface clamps and fixes the steel strip on the outer surface of the slot block 31. Then, the motor 1 rotates in the opposite direction through its output end, driving the screw 28 to rotate. This causes the sliding rod 210 to move the steel strip fixed on the outer surface of the slot block 31 to the other end of the furnace body 4 for threading the steel strip. The semi-circular cover 212 is made of high-temperature resistant material so that it can withstand the high temperature inside the furnace body 4 as much as possible and is not easily deformed. At the same time, the motor 1 is located on the outer surface of the positioning plate 21, so that the motor 1 is far away from the furnace body 4, minimizing the impact of the high temperature of the furnace body 4 on the motor 1 and preventing it from failing to operate normally. When the screw 28 rotates, the end away from the second gear 27 will rotate on the inner wall of the positioning ring 214. The positioning ring 214 can limit the angle of the two ends of the screw 28 as much as possible to prevent the angle of the screw 28 from deflecting and causing the sliding rod 210 to fail to move normally.

[0033] The above description is merely a preferred embodiment of this application and is not intended to limit the application in any other way. Any person skilled in the art may modify or alter the disclosed technical content to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical essence of this application, without departing from the scope of the technical solution, shall still fall within the protection scope of this application. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood through specific circumstances.

Claims

1. A belt threading device for a horizontal continuous annealing furnace, characterized in that: The device includes a motor (1), a furnace body (4) is provided on one side of the motor (1), a traction device (2) is provided on the outer surface of the furnace body (4), the traction device (2) includes a positioning plate (21), one side of the positioning plate (21) is fixedly connected to one side of the furnace body (4), the motor (1) is located on the outer surface of the positioning plate (21), the output end of the motor (1) is fixedly connected to a first pulley (22), the outer surface of the first pulley (22) is provided with a belt (23), and a rotating shaft (24) is rotatably connected to one side of the positioning plate (21). A second pulley (25) is fixedly connected to the outer surface of the rotating shaft (24). A first gear (26) is fixedly connected to the end of the rotating shaft (24) away from the positioning plate (21). A second gear (27) is meshed with the outer surface of the first gear (26). A screw (28) is fixedly connected to one end of the second gear (27). Semicircular covers (212) are fixedly connected to both sides of the inner wall of the furnace body (4). A rectangular groove (213) is opened on one side of the outer surface of the semicircular cover (212). The outer surface of the screw (28) is within a semicircular cover. The inner wall of (212) rotates, and the outer surface of the screw (28) is threaded with a threaded ring (211). The outer surface of the threaded ring (211) is fixedly connected with a sliding rod (210). The furnace body (4) has a sliding groove (29) inside. The outer surface of the sliding rod (210) slides on the inner wall of the sliding groove (29). The two ends of the sliding rod (210) slide on the inner wall of the rectangular groove (213) on one side of the outer surface of the two semicircular covers (212). The two ends of the sliding rod (210) are respectively provided with clamping devices (3); the semicircular cover (212) rotates on the inner wall of the screw (28). The outer surface of the screw (28) is threaded with a threaded ring (211). The outer surface of the screw (211) is fixedly connected with a sliding rod (210). The inner wall of the screw (212) rotates on the inner wall of the screw (28). The outer surface of the screw (28) is threaded with a threaded ring (211). The outer surface of the screw (211) is fixedly connected with a sliding rod (210). The outer surface of the screw (212) rotates on the inner wall of the screw (28). The outer surface of the screw (28) is threaded with a threaded ring (211). The outer surface of the screw (211) is threaded with a sliding ring (211). The outer surface of the screw (212 ... The dome (212) and clamping device (3) are made of high temperature resistant material. The motor (1) is located on the outer surface of the positioning plate (21). A positioning ring (214) is fixedly connected to one side of the inner wall of one of the semi-circular domes (212). The end of the screw (28) away from the second gear (27) rotates on the inner wall of the positioning ring (214). A positioning rod (215) is fixedly connected to the outer surface of the furnace body (4) near the rotating shaft (24). The end of the outer surface of the rotating shaft (24) near the second gear (27) rotates on the inner wall of the positioning rod (215).The clamping device (3) includes a groove block (31), one side of which is fixedly connected to one end of a sliding rod (210). A groove (32) is formed on the outer surface of the groove block (31). Two round rods (33) are slidably connected to the inner wall of the groove block (31). Clamping blocks (37) are fixedly connected to the outer surfaces of the two round rods (33) at their closest points. One side of each clamping block (37) slides on the inner wall of the groove (32). A cylinder (34) is fixedly connected to the upper and lower ends of the outer surface of the groove block (31). The outer surface of the round rod (33) slides on the inner wall of the cylinder (34). A spring (35) is provided at the top of the round rod (33). The upper and lower ends of the spring (35) are respectively connected to the upper and lower ends of the round rod (33). One end is fixedly connected to the inner wall of the cylinder (34) away from the side of the groove block (31); the outer surfaces of the two clamping blocks (37) are arc-shaped at the edges away from the groove block (31); a number of rectangular strips (38) are fixedly connected to one side of the clamping block (37), and the rectangular strips (38) are linearly distributed on one side of the outer surface of the clamping block (37); a central rod (36) is fixedly connected to one side of the inner wall of the cylinder (34), and the central rod (36) is located on the inner wall of the spring (35), and the inner wall of the round rod (33) slides on the outer surface of the central rod (36); two semicircular blocks (39) are fixedly connected to one side of the groove block (31), and the two semicircular blocks (39) slide on the outer surface of the semicircular cover (212) on the side away from the groove block (31).

2. A method for threading a strap, characterized in that: The method for threading the belt in the threading device of the horizontal continuous annealing furnace according to claim 1 includes the following steps: S1. The motor (1) rotates in the forward direction through the output end of the motor (1) to drive the first pulley (22) to rotate. Through the belt (23) and the second pulley (25), the shaft (24) and the first gear (26) rotate. Through the first gear (26), the second gear (27) and the screw (28) rotate, causing the threaded ring (211) on the outer surface of the screw (28) to move on the surface of the screw (28), causing the sliding rod (210) to slide on the inner wall of the slide groove (29) and the inner wall of the rectangular groove (213), and moving the groove blocks (31) at both ends of the sliding rod (210) to one end of the furnace body (4). S2. Insert both sides of the strip steel into the two clamping blocks (37) on the outer surface of the two slot blocks (31). When part of the strip steel is between the two clamping blocks (37), the two springs (35) will return to their original state and push the two round rods (33) to move in the same direction. Press the side of the two clamping blocks (37) that are close to each other onto the outer surface of the strip steel. Clamp and fix the strip steel on the outer surface of the slot blocks (31). S3. The motor (1) rotates in the opposite direction through the output end of the motor (1) to drive the screw (28) to rotate, so that the sliding rod (210) drives the steel strip fixed on the outer surface of the slot block (31) to move to the other end of the furnace body (4) to thread the steel strip.

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