A device for detecting micro cracks in hot-rolled strip steel

Abstract

The present invention discloses a hot-rolled strip micro crack detection device, comprising a shell, a control component is provided on the top of the shell, and a scanning component is provided on the bottom of the shell; through the cooperation of the control component and the scanning component, the scanning component is controlled to move left and right to detect the micro cracks of the hot-rolled strip, thereby preventing unqualified hot-rolled strip from entering the market, ensuring product quality, and saving resources. In addition, dust blowing pipes are provided on both sides of the connection seat of the scanning component, and the air outlet ends of the dust blowing pipes are all facing the scanner, which can remove dust and reduce temperature, avoiding the influence of iron oxide on the detection results, and avoiding the problem of deviation in the measurement results of the scanner and reduced life due to high temperature, ensuring that the detection value is always accurate and reliable.

Description

Technical Field

[0001] The invention relates to the field of metallurgical detection equipment, and in particular to a hot-rolled strip steel micro crack detection device. Background Art

[0002] Hot-rolled strip refers to strips and plates produced by hot rolling. Hot-rolled strip can be used directly as hot-rolled steel plates, or it can be supplied as cold-rolled steel as billets. It is widely used in the fields of automobiles, motors, chemicals, shipbuilding, etc. It can also be used as billets for cold rolling, welded pipes, and cold-bent steel. In the production process of hot-rolled strip, the raw materials must first be heated and then rolled. A large amount of iron oxide scale and crack defects will be generated during the heating and rolling process. Since the surface of the strip is protected by iron oxide scale, microscopic crack defects cannot be observed by the naked eye, and these microscopic cracks are the main reason for the deterioration of the quality of the strip. Because the temperature of the strip is high during hot rolling and the strip size is large, it is impossible to perform microscopic crack detection manually during rolling production. Therefore, hot-rolled strip is not microscopically inspected during traditional production, resulting in unqualified hot-rolled steel strips with microscopic cracks entering the market. During the production and processing of unqualified hot-rolled strip, if it encounters ultra-deep drawing or excessive bending angle, it will often crack at these cracks. Therefore, the existence of micro cracks becomes a barrier to the processing of hot-rolled strip, and timely detection and adjustment of the process are required to prevent it, so as to improve the quality of the hot-rolled strip. Summary of the invention

[0003] The present invention provides a hot-rolled steel strip micro crack detection device, aiming to solve the problem that hot-rolled steel strip micro cracks cannot be detected, the existence of cracks causes poor steel strip quality, and the hot-rolled steel strip with cracks is prone to cracking during processing.

[0004] The present invention is a hot-rolled strip micro crack detection device, comprising a shell with two ends opened in the Y direction, a control component is arranged on the top of the shell, and a scanning component is arranged on one side of the bottom of the shell;

[0005] A fixed frame is provided on the inner side of the shell along the X direction, a hollow movable frame is slidably connected to the outer side of the fixed frame away from the scanning component, an elastic member is provided in the inner cavity of the movable frame, a guide wheel is provided at the end of the elastic member away from the fixed frame, an X-direction partition is provided on the inner side of the shell below the fixed frame, a roller is provided at the end of the partition away from the guide wheel, and a threaded rod is provided at the front opening end of the shell below the partition;

[0006] The control assembly includes a control box, an air guide assembly is arranged in the control box, the air guide assembly includes an air pump, the air outlet end of the air pump is connected to the cavity of the hollow air guide plate, the air outlet end of the air guide plate is connected to one side of the transmission box through two air blowing pipes, the air blowing pipes are respectively provided with a forward valve and a reverse valve, a transmission rod is vertically arranged in the transmission box, the transmission rod is provided with a plurality of fan blades, the other side of the transmission box is connected to the filter box, the air outlet end of the filter box is provided with an air guide pipe passing through the control box, and the air guide pipe is connected to the scanning assembly through a rubber tube serpentinely wound around the movable frame and the outer periphery of the partition from top to bottom; The top of the transmission rod passes through the shell, and a driven rod parallel to the transmission rod is provided on the outside of the shell near the air pump. The tops of the transmission rod and the driven rod are both provided with pulleys. The transmission rod and the driven rod are connected by a belt provided on the outer periphery of the pulley. The bottom end of the driven rod passes through the shell and is connected to the threaded rod by meshing with a bevel gear. The two ends of the threaded rod are respectively provided with a first proximity switch and a second proximity switch, and the first proximity switch and the second proximity switch are electrically connected to the signal input end of the PLC programmable controller, and the signal output end of the PLC programmable controller is electrically connected to the forward valve and the reverse valve.

[0007] The scanning assembly includes a connecting block, which is connected to the threaded rod. A connecting seat is fixedly provided at the bottom of the connecting block. Both the connecting block and the connecting seat are provided with cavities, and gas from the air guide assembly is introduced through a connecting pipe. A supporting block is connected to the bottom of the connecting seat, and a scanner is provided at the bottom of the supporting block. A plurality of dust blowing pipes are evenly and equidistantly provided on both sides of the connecting seat, the air inlet ends of the dust blowing pipes are connected to the cavity in the connecting seat, and the air outlet ends of the dust blowing pipes are all facing the scanner.

[0008] Preferably, a support assembly is also provided at the bottom of the shell, and the support assembly includes a support plate, which is fixedly connected to the back of the shell, and movable columns are symmetrically provided at the bottom of the support plate. The bottom of the movable column is embedded in an inverted T-shaped support seat, and an electric telescopic rod is provided at the embedded end of the movable column.

[0009] Preferably, a plurality of baffles are arranged at intervals above and below the inner wall of the filter box, a gap is reserved between the free end of the baffle and the inner wall of the filter box, and a plurality of filter screens are clamped between adjacent baffles.

[0010] Preferably, the rubber tube is a flexible hose.

[0011] Preferably, the elastic member is a spring, and the spring always maintains a pre-tightening force on the rubber tube.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The hot-rolled strip micro crack detection device provided by the present invention realizes the hot-rolled strip micro crack detection through the cooperation of the control component and the scanning component. The transmission rod drives the driven rod, and the driven rod drives the threaded rod to control the scanning component to move left and right, so as to achieve the purpose of detecting the micro cracks of the hot-rolled strip without blind spots. The whole process of detection will not cause damage to the finished hot-rolled strip, which greatly avoids the unqualified hot-rolled strip from entering the market, ensures product quality, and saves resources.

[0014] 2. In the hot-rolled strip micro-crack detection device provided by the present invention, multiple dust blowing pipes are evenly and equidistantly provided on both sides of the connection seat of the scanning component, and the air outlet ends of the dust blowing pipes are all facing the scanner, which can remove dust and reduce temperature, thereby avoiding the influence of iron oxide on the detection result, and avoiding the problem of deviation in the measurement result and shortening the life of the scanner due to high temperature, thereby ensuring that the detection value is always accurate and reliable.

[0015] 3. The hot-rolled strip micro-crack detection device provided by the present invention has an elastic part in the movable frame cavity, and the air guide pipe of the control component is connected with the scanning component through a flexible rubber tube that is serpentinely wound around the movable frame and the outer side of the partition from top to bottom. The elastic force generated by the elastic part always gives the rubber tube a pre-tightening force to prevent the rubber tube from knotting and clogging, thereby ensuring that the air in the rubber tube can be stably transported when the connecting block moves, completing continuous dust removal and cooling during scanning, and ensuring the accuracy of the scanning results.

[0016] 4. The hot-rolled strip micro-crack detection device provided by the present invention has an electric telescopic rod at the bottom of the movable column, which can not only support the shell but also adjust the height of the shell to meet the detection requirements of hot-rolled strips of different specifications and improve the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the hot-rolled strip micro crack detection device of the present invention;

[0018] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 A top view of the control box of the present invention;

[0020] Figure 4 It is a schematic diagram of the structure of the air guide plate of the present invention;

[0021] In the figure: 1-shell; 2-support plate; 3-movable column; 4-inverted T-shaped support seat; 5-electric telescopic rod; 6-connecting block; 7-partition; 8-rubber tube; 9-fixed frame; 10-movable frame; 11-guide wheel; 12-elastic member; 13-control box; 14-air guide pipe; 15-filter box; 16-transmission box; 17-transmission rod; 18-driven rod; 19-air guide plate; 20-air pump; 21-connecting seat; 22-threaded rod; 23-connecting pipe; 24-dust blowing pipe; 25-support block; 26-cavity; 27-roller; 28-scanner; 29-baffle; 30-filter; 31-fan blade; 32-forward valve; 33-reverse valve; 34-first proximity switch; 35-second proximity switch. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] like Figure 1-4As shown, the present invention is a device for detecting micro cracks in hot-rolled strip steel, comprising a shell 1 with openings at both ends in the Y direction, a control assembly is provided on the top of the shell 1 for driving air flow and realizing the movement and cleaning of the scanning assembly, and a scanning assembly is provided on one side of the bottom of the shell 1. A fixed frame 9 is provided on the inner side of the shell 1 along the X direction, and a hollow movable frame 10 is slidably connected to the outer side of the fixed frame 9 away from the scanning assembly, a spring is provided in the inner cavity of the movable frame 10, and a guide wheel 11 is provided at the end of the spring away from the fixed frame 9, an X-direction partition 7 is provided on the inner side of the shell 1 below the fixed frame 9, a roller 27 is provided at the end of the partition 7 away from the guide wheel 11, and a threaded rod 22 is provided at the front open end of the shell 1 below the partition 7; the control assembly comprises a control box 13, and an air guide assembly is provided in the control box 13, and the air guide assembly comprises an air pump 20, and the air outlet end of the air pump 20 is connected to the cavity 26 of the hollow air guide plate 19, and the air outlet end of the air guide plate 19 is connected to the transmission box 16 through two air blowing pipes. One side is connected, and a forward valve 32 and a reverse valve 33 are respectively arranged on the air blowing pipe, and both the forward valve 32 and the reverse valve 33 are solenoid valves. A transmission rod 17 is vertically arranged in the transmission box 16, and three fan blades 31 are arranged on the transmission rod 17. The other side of the transmission box 16 is connected to the filter box 15, and four baffles 29 are arranged at intervals on the upper and lower inner walls of the filter box 15. A gap is reserved between the free end of the baffle 29 and the inner wall of the filter box 15, and three filter screens 30 are clamped between adjacent baffles 29. The air outlet end of the filter box 15 is provided with an air guide pipe 14 passing through the control box 13, and the air guide pipe 14 is connected to the scanning component through a flexible rubber tube 8 serpentinely wound around the movable frame 10 and the outer periphery of the partition 7 from top to bottom. The spring always keeps the pre-tightening force on the rubber tube 8 to prevent the rubber tube 8 from being knotted and blocked, thereby ensuring that when the connecting block 6 moves, the air in the rubber tube 9 can be stably transported, completing the continuous cleaning of the scanner 28 and ensuring the accuracy of the scanning result; the top of the transmission rod 17 passes through the shell 1, and the outside of the shell 1 close to the air pump 20 is provided with a driven rod 18 parallel to the transmission rod 17, and the tops of the transmission rod 17 and the driven rod 18 are both provided with pulleys, and the transmission rod 17 and the driven rod 18 are connected by a belt arranged on the outer periphery of the pulley, and the bottom end of the driven rod 18 passes through the shell 1 and is meshed with the threaded rod 22 through a bevel gear, and the transmission rod 17 drives the driven rod 18, and the driven rod 18 drives the threaded rod 22. Rod 22 controls the left and right movement of the scanning component; a first proximity switch 34 and a second proximity switch 35 are respectively provided at both ends of the threaded rod 22, the first proximity switch 34 and the second proximity switch 35 are electrically connected to the signal input end of the PLC programmable controller, and the signal output end of the PLC programmable controller is electrically connected to the forward valve 32 and the reverse valve 33; the scanning component includes a connecting block 6, the connecting block 6 is connected to the threaded rod 22, a connecting seat 21 is fixedly provided at the bottom of the connecting block 6, a cavity is provided inside the connecting block 6 and the connecting seat 21, and gas of the air guide component is introduced through the connecting pipe 23, a supporting block 25 is connected to the bottom of the connecting seat 21, and a scanner 28 is provided at the bottom of the supporting block 25;Four dust blowing pipes 24 are evenly and evenly arranged on both sides of the connection seat 21. The air inlet end of the dust blowing pipe 24 is connected to the cavity in the connection seat 21, and the air outlet end of the dust blowing pipe 24 is facing the scanner 28, so as to achieve the purpose of dust removal and cooling during scanning, which not only avoids the influence of iron oxide on the detection results, but also avoids the problem of deviation of the measurement results of the scanner and reduction of life caused by high temperature, so as to ensure that the detection value is always accurate and reliable; a support component is also arranged at the bottom of the shell 1, and the support component includes a support plate 2, which is fixedly connected to the back of the shell 1, and a movable column 3 is symmetrically arranged at the bottom of the support plate 2, and the bottom of the movable column 3 is embedded in the inverted T-shaped support seat 4, and the embedded end of the movable column 3 is provided with an electric telescopic rod 5, which can not only support the shell 1, but also adjust the height of the shell 1, so as to meet the detection requirements of hot-rolled strip steel of different specifications and improve the practicality of the equipment. ;

[0024] During the inspection, the hot-rolled steel coil to be inspected is first placed on a self-driven roller, and the steel coil is automatically rotated by driving the roller, so that the steel coil is within the detection range of the hot-rolled steel micro crack detection device, and then the electric telescopic rod 5 is adjusted to adjust the height of the hot-rolled steel micro crack detection device to meet the scanning range of the scanner 28. The air pump 20 is turned on, and the air pump 20 provides X-direction power for the scanner 28, as well as an air source for dust removal and cooling of the steel strip. The forward valve 32 is turned on, and the power generated by the rotation of the fan blade 31 is output by the transmission rod 17. The rotation direction of the output shaft of the transmission rod 17 is controlled by the forward valve 32 or the reverse valve 33. The output shaft of the transmission rod 17 transmits the power to the driven rod 18 connected to its belt, and the driven rod 18 then transmits the power to the threaded rod 22 meshed with the bevel gear. The rotation direction of the driven rod 18 and the threaded rod 22 changes with the rotation direction of the output shaft of the transmission rod 17, thereby driving the connecting block 6 to move left and right, and realizing the left and right movement of the scanner 28. When the forward valve 32 is opened, the scanner 28 moves to the right. During the scanning process, when the second proximity switch 35 detects the proximity signal and feeds back to the PLC programmable controller, the PLC programmable controller controls the forward valve 32 to close, and the reverse valve 33 to open. At this time, the scanner 28 moves to the left. When the first proximity switch 34 detects the proximity signal and feeds back to the PLC programmable controller, the PLC programmable controller controls the reverse valve 33 to close, and the forward valve 32 to open. The scanner is repeatedly controlled to move left and right, and a comprehensive scanning and detection of micro cracks in the hot-rolled strip steel coil is performed to ensure that unqualified hot-rolled steel strip with micro cracks does not enter the market. The gas after driving the fan blades 31 is filtered by the filter box 15 and then output through the air guide pipe 14 to the rubber tube 8, and then blown out by the dust blowing pipes 24 on both sides of the connecting seat 21 to cool and clean the steel coil. The rubber tube 8 is a flexible hose. The elastic force generated by the guide wheel 11 and the spring always gives the rubber tube 8 a pre-tightening force to prevent the rubber tube 8 from knotting and clogging, ensuring that the air in the rubber tube 9 can be stably transported to complete continuous dust removal and cooling during scanning.

Claims

1. A hot-rolled strip micro crack detection device, characterized in that: The invention comprises a shell (1) with openings at both ends in the Y direction, a control component being provided at the top of the shell (1), and a scanning component being provided at one side of the bottom of the shell (1); a support component being further provided at the bottom of the shell (1), and comprising a support plate (2), the support plate (2) being fixedly connected to the back of the shell (1), and movable columns (3) being symmetrically provided at the bottom of the support plate (2), the bottom of the movable columns (3) being embedded in an inverted T-shaped support seat (4), and an electric telescopic rod (5) being provided at the embedded end of the movable columns (3); A fixed frame (9) is provided on the inner side of the shell (1) along the X direction, a hollow movable frame (10) is slidably connected to the outer side of the fixed frame (9) away from the scanning component, an elastic member (12) is provided in the inner cavity of the movable frame (10), a guide wheel (11) is provided at the end of the elastic member (12) away from the fixed frame (9), an X-direction partition (7) is provided on the inner side of the shell (1) below the fixed frame (9), a roller (27) is provided at the end of the partition (7) away from the guide wheel (11), and a threaded rod (22) is provided at the front opening end of the shell (1) below the partition (7); The control assembly comprises a control box (13), wherein an air guide assembly is arranged in the control box (13), wherein the air guide assembly comprises an air pump (20), wherein an air outlet end of the air pump (20) is connected to a cavity (26) of a hollow air guide plate (19), wherein an air outlet end of the air guide plate (19) is connected to one side of a transmission box (16) via two air blowing pipes, wherein the air blowing pipes are respectively provided with a forward valve (32) and a reverse valve (33), and a transmission rod (17) is vertically arranged in the transmission box (16). ), a transmission rod (17) is provided with a plurality of fan blades (31), the other side of the transmission box (16) is connected to a filter box (15), an air duct (14) passing through the control box (13) is provided at the air outlet end of the filter box (15), the air duct (14) and the scanning assembly are connected through a rubber tube (8) serpentinely wound around the outer periphery of the movable frame (10) and the partition (7) from top to bottom; a plurality of baffles (29) are arranged at intervals on the inner wall of the filter box (15), and the baffles (29) A gap is reserved between the free end and the inner wall of the filter box (15), and a plurality of filter screens (30) are clamped between adjacent baffles (29); the top of the transmission rod (17) passes through the housing (1), and a driven rod (18) parallel to the transmission rod (17) is provided on the outside of the housing (1) near the air pump (20), and pulleys are provided at the tops of the transmission rod (17) and the driven rod (18), and the transmission rod (17) and the driven rod (18) are connected by a belt provided on the outer periphery of the pulley, and the bottom end of the driven rod (18) passes through the housing (1) and is meshed with the threaded rod (22) by a bevel gear; a first proximity switch (34) and a second proximity switch (35) are provided at both ends of the threaded rod (22), respectively, and the first proximity switch (34) and the second proximity switch (35) are electrically connected to the signal input end of the PLC programmable controller, and the signal output end of the PLC programmable controller is electrically connected to the forward valve (32) and the reverse valve (33); The scanning assembly comprises a connecting block (6), the connecting block (6) being connected to a threaded rod (22), a connecting seat (21) being fixedly arranged at the bottom of the connecting block (6), a cavity being arranged inside the connecting block (6) and the connecting seat (21), and gas of the air guide assembly being introduced through a connecting pipe (23), a supporting block (25) being connected at the bottom of the connecting seat (21), and a scanner (28) being arranged at the bottom of the supporting block (25); a plurality of dust blowing pipes (24) being evenly and equidistantly arranged on both sides of the connecting seat (21), an air inlet end of the dust blowing pipe (24) being connected to the cavity inside the connecting seat (21), and an air outlet end of the dust blowing pipe (24) facing the scanner (28).

2. A hot rolled strip micro crack detection device as claimed in claim 1, characterized in that: The rubber tube (8) is a flexible hose.

3. A hot rolled strip micro crack detection device as claimed in claim 2, characterized in that: The elastic member (12) is a spring, and the spring always maintains a pre-tightening force on the rubber tube (8).

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