Device for online fast measuring length of steel billet

Abstract

A device for online rapid measurement of the length of steel billets entering the furnace, belonging to the technical field of auxiliary equipment for steelmaking production, is used for online rapid measurement of the length of steel billets entering the furnace. The technical solution is as follows: two fixed supports are respectively fixed on both sides of the charging machine support arm. The upper end of the fixed supports has a horizontal fixed shaft. Two rotating arms are respectively composed of swing rods, connecting rods, and pushing rods. The rear end of the swing rods has a rotating shaft hole that is rotatably connected to the fixed shaft at the upper end of the fixed supports. The front ends of the two swing rods are respectively connected to both ends of a measuring ruler, which is opposite to the outer side of the billet conveying roller. The two ends of the two connecting rods are respectively fixedly connected to the rear ends of the two swing rods and one end of the two pushing rods. The rod bodies of the two pushing rods are respectively opposite to the upper surfaces of both sides of the charging machine support arm. Water pipe adapters and cooling water pipes are respectively provided on the rotating arms and the measuring ruler. This utility model can measure the length of steel billets before entering the furnace online, avoiding equipment accidents and eliminating safety hazards.

Description

Technical Field

[0001] This utility model relates to a device for online rapid measurement of the length of steel billets entering the furnace, belonging to the technical field of auxiliary equipment for steelmaking production. Background Technology

[0002] After steel billets produced in steelmaking are cut to specified lengths and widths, they undergo a series of subsequent processes and are directly conveyed to the charging port of the heating furnace via hot conveyor rollers. The charging machine's boom is used for alignment and loading. Alternatively, they can be transported by truck or hoisted from the stockyard to the charging port for alignment and loading. Once the billets are heated to the required process temperature, they are tapped from the heating furnace and rolled into the designated specifications by a rolling mill.

[0003] During steel loading operations, one side of the billet faces the charging port of the heating furnace. Due to various factors such as malfunction of the length-fixing equipment, system bugs, information transmission errors, and incorrect billet hoisting, the actual length of the billet before entering the furnace may not match the loading information. This can easily lead to major accidents in the heating furnace, such as the billet falling off the track, scraping against the furnace door and furnace wall. Oversized billets may also damage rolling mill equipment, such as rolling mill stand rolls and valves, or cause equipment damage due to excessive torque. At the same time, it will affect the yield of the production line. Therefore, it is necessary to accurately know the length of the billet before entering the furnace.

[0004] Existing billet length measuring devices mostly consist of fixed-length machines and require precision components such as laser rangefinders and sensors, significantly increasing equipment costs and maintenance. They are also difficult to adapt to high-temperature conditions and are rarely installed at the furnace front for on-site measurement of billet length. Furthermore, due to the rapid heat transfer, high billet temperature, and fast loading pace, it is impossible to manually remeasure each billet; only random checks and verification are possible. Moreover, due to the high labor intensity for workers and significant safety hazards in the working environment, mismeasurements frequently occur. Therefore, there is a strong need to design a device that can perform on-site measurement of billet length at the furnace front to solve the problem of billet length measurement. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an online rapid measurement device for the length of steel billets entering the furnace. This measuring device can quickly measure the length of steel billets before they enter the furnace online, solving the problem that existing measuring equipment is not suitable for on-site measurement, avoiding major equipment accidents caused by incorrect billet lengths, eliminating the disadvantages of high labor intensity and safety hazards associated with manual measurement, and ensuring the normal operation of safe production.

[0006] The technical solution to the above technical problem is:

[0007] A device for online rapid measurement of the length of steel billets entering a furnace includes fixed supports, rotating arms, a measuring scale, a water pipe adapter, and a cooling water pipe. Two fixed supports are respectively fixed to both sides of the steel loading machine support arm in front of the furnace door. Each of the two fixed supports has a horizontal fixed shaft at its upper end. The two rotating arms are each composed of a swing rod, a connecting rod, and a pushing rod. The rear ends of the two swing rods have rotating shaft holes that are rotatably connected to the fixed shafts at the upper ends of the two fixed supports. The front ends of the two swing rods are respectively connected to both ends of the measuring scale, which is placed horizontally. The ruler is opposite to the outer side of the billet conveying roller. The two connecting rods are located below the two swing rods and are in the same vertical plane. The upper ends of the two connecting rods are fixedly connected to the rear ends of the two swing rods. The two connecting rods and the two swing rods have an angle of less than 90 degrees. The lower ends of the two connecting rods are fixedly connected to one end of the two push rods. The two push rods are perpendicular to the two swing rods. The rods of the two push rods are opposite to the upper surfaces of both sides of the steel loading machine support arm. There are water pipe adapters on the rotating arm and the measuring ruler, and the water pipe adapters are connected to the cooling water pipes.

[0008] The aforementioned online rapid measurement device for the length of steel billets entering the furnace comprises a fixed support consisting of a base plate, a column, a fixed shaft, and a circular baffle. The base plate has anchor bolt holes, through which the fixing bolts fix the base plate to the feet on both sides of the steel loading machine support arm. The column is an upright rectangular column, with its lower end welded to the base plate. The fixed shaft is installed on the upper end of the column, and its end face has baffle fixing screw holes. The diameter of the circular baffle is larger than the outer diameter of the fixed shaft, and the circular baffle has through holes corresponding to the baffle fixing screw holes on the end face of the fixed shaft. The baffle bolts fix the circular baffle to the end face of the fixed shaft, and the circular baffle blocks the outside of the swing rod fitted on the fixed shaft.

[0009] In the aforementioned online rapid measurement device for the length of steel billets entering the furnace, the swing rod and connecting rod of the rotating arm are rectangular tubes. The rear end of the swing rod is welded to and connected to the upper end of the connecting rod. The push rod is a round tube, and its inner end is welded to and connected to the lower end of the connecting rod. Water pipe adapters are welded to the front end of the swing rod and the outer end face of the push rod, respectively. The water pipe adapters are connected to cooling water pipes. A sleeve is fitted on the outside of the push rod, and the inner diameter of the sleeve matches the outer diameter of the push rod. The sleeve and the push rod are in a rotating fit, and the sleeve is in rolling contact with the upper surface of the steel loading machine support arm.

[0010] In the aforementioned online rapid measurement device for the length of steel billets entering the furnace, a guide sleeve is welded to the front end of the swing rod of the rotating arm. The guide sleeve is a rectangular tube and is perpendicular to the swing rod. The inner diameter of the guide sleeve matches the outer diameter of the measuring ruler. The measuring ruler is inserted into the guide sleeve, and the measuring ruler and the guide sleeve are in a sliding fit.

[0011] The aforementioned online rapid measurement device for the length of steel billets entering the furnace comprises a measuring rod and a billet stop rod. Both the measuring rod and the billet stop rod are rectangular tubes, and are vertically welded together in an L-shape. The end openings of both the measuring rod and the billet stop rod are sealed with blind plates. The two ends of the measuring rod are respectively inserted into the inner holes of the guide sleeves at the front ends of the two rotating arms, with a sliding fit between the measuring rod and the guide sleeves. The side of the measuring rod has scale markings. The gap between the billet stop rod and the billet conveying roller is aligned. Water pipe adapters are welded to both the measuring rod and the billet stop rod, and the water pipe adapters are respectively connected to cooling water pipes.

[0012] The aforementioned online rapid measurement device for the length of steel billets entering the furnace includes a measuring scale collar and a guide sleeve collar at the connection between the measuring scale and the guide sleeve at the front end of the swing arm of the rotating arm. Both the measuring scale collar and the guide sleeve collar have rectangular inner holes, the dimensions of which match the external dimensions of the measuring scale and the guide sleeve, respectively. The rectangular inner holes of the measuring scale collar and the guide sleeve collar are fitted onto the outside of the measuring scale and the guide sleeve, respectively. The top surfaces of the measuring scale collar and the guide sleeve collar have tightening screw holes that communicate with the rectangular inner holes. Tightening bolts are connected to the outer walls of the measuring scale and the guide sleeve through these tightening screw holes. A spring is fitted onto the measuring scale between the measuring scale collar and the guide sleeve collar, with both ends of the spring connected to the measuring scale collar and the guide sleeve collar, respectively.

[0013] The aforementioned online rapid measurement device for the length of steel billets entering the furnace has an outwardly rectangular protrusion on the inner sidewall of one end of the guide sleeve. The inner sidewall of the guide sleeve inside the rectangular protrusion forms a rectangular groove. A slider is placed in the rectangular groove, and the size of the slider matches the rectangular groove. There is an adjustment screw hole on the rectangular protrusion, and a circular blind hole on the slider that corresponds to the adjustment screw hole on the rectangular protrusion. The adjustment bolt is connected to the circular blind hole on the slider through the adjustment screw hole on the rectangular protrusion.

[0014] The aforementioned device for rapidly measuring the length of steel billets entering the furnace also includes a camera. The camera is installed on the outside of the scale corresponding to the end of the measuring ruler, with the camera aligned with the scale indicator line of the measuring ruler. The camera has a display screen capable of showing the length of the steel billet.

[0015] The beneficial effects of this utility model are:

[0016] In this invention, the push rod at the lower part of the rotating arm is opposite to the upper surfaces of both sides of the steel loading machine support arm. When the steel loading machine support arm moves upward, it can drive the push rod to move upward. The push rod drives the swing rod to rotate around the fixed axis at the upper end of the column of the fixed support through the connecting rod. The front end of the swing rod of the rotating arm is connected to the guide sleeve, and the measuring scale is fitted inside the guide sleeve. When the swing rod of the rotating arm rotates, it can drive the measuring scale to move upward. The billet stop bar of the measuring scale is positioned with the front end of the billet, and the measuring rod of the measuring scale has a scale indicator to show the length of the billet. The rotating arm and the measuring scale are respectively equipped with water pipe adapters and cooling water pipes, and cooling water is supplied through the cooling water pipes and water pipes. The adapter enters the rotating arm and measuring scale for cooling circulation, preventing the rotating arm and measuring scale from being affected by the high temperature of the steel billet. The measuring scale collar and guide sleeve collar are fixedly connected to the measuring scale and guide sleeve, respectively. A spring is connected between the measuring scale collar and the guide sleeve collar. Adjusting the distance between the measuring scale collar and the guide sleeve collar can adjust the spring preload, which is used for the reset of the measuring scale. A slider is placed on the inner wall of the guide sleeve and slides in contact with the side wall of the measuring scale. The friction between the slider and the measuring scale can be adjusted by adjusting the bolt, so that the measuring scale slowly contacts and separates from the steel billet. The length of the steel billet measured by the measuring scale can be observed through the camera's display screen.

[0017] This utility model has a simple structure, and its measurement is simple, efficient, convenient and quick. It can quickly measure the length of steel billets before they enter the furnace online, solving the problem that existing measuring equipment is not suitable for on-site measurement. It avoids major equipment accidents caused by incorrect billet lengths, eliminates the drawbacks of manual measurement such as high labor intensity and safety hazards, and ensures the normal operation of safe production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural diagram of the fixed bracket;

[0020] Figure 3 This is a schematic diagram of the circular baffle structure on the fixed shaft end face of the fixed bracket;

[0021] Figure 4 This is a schematic diagram of the rotating arm;

[0022] Figure 5 This is a schematic diagram of the measuring ruler.

[0023] Figure 6 This is a structural schematic diagram of the measuring scale collar and the guide sleeve collar;

[0024] Figure 7 This is a partial structural diagram of the guide sleeve of the rotating arm;

[0025] Figure 8This is a schematic diagram of the slider's structure;

[0026] Figure 9 This is a structural diagram of the installation position of this utility model;

[0027] Figure 10 This is a schematic diagram showing the steel loading machine's support arm in its lowest position.

[0028] Figure 11 This is a schematic diagram illustrating the application of a steel loading machine with its support arm in the middle position.

[0029] Figure 12 This is a schematic diagram illustrating the application of the steel loading machine's support arm in aligning and measuring the length of the steel billet.

[0030] Figure 13 This is a schematic diagram illustrating the application of the steel loading machine's support arm in contact with the steel billet;

[0031] Figure 14 This is a schematic diagram showing the steel loading machine's support arm in its highest position.

[0032] The markings in the diagram are as follows: 1. Steel loading machine support arm; 2. Steel billet conveying roller; 3. Steel billet; 4. Heating furnace door; 5. Fixed bracket; 6. Rotating arm; 7. Measuring ruler; 8. Water pipe adapter; 9. Cooling water pipe; 10. Base plate; 11. Column; 12. Fixed shaft; 13. Circular baffle; 14. Anchor bolt hole; 15. Baffle fixing screw; 16. Through hole; 17. Swing rod; 18. Connecting rod; 19. Push rod; 20. Rotating shaft hole; 21. Sleeve; 22. Guide sleeve; 23. Measuring rod; 24. Steel billet stop bar; 25. Scale indicator line; 26. Measuring ruler collar; 27. Guide sleeve collar; 28. Rectangular inner hole; 29. ​​Tightening screw hole; 30. Spring; 31. Rectangular protrusion; 32. Rectangular groove; 33. Slider; 34. Adjusting screw hole; 35. Circular blind hole; 36. Camera. Detailed Implementation

[0033] This utility model consists of a fixed bracket 5, a rotating arm 6, a measuring ruler 7, a water pipe adapter 8, and a cooling water pipe 9.

[0034] Figure 1 , 2Figure 3 shows that two fixed brackets 5 are respectively fixed on both sides of the steel loading machine support arm 1 in front of the furnace door 4, used to support the rotating arm 6 and the measuring ruler 7. The fixed bracket 5 consists of a base plate 10, a column 11, a fixed shaft 12, and a circular baffle 13. The base plate 10 has anchor bolt holes 14, through which the fixing bolts fix the base plate 10 to the feet on both sides of the steel loading machine support arm 1. The column 11 is an upright rectangular column, and the lower end of the column 11 is welded to the base plate 10. The fixed shaft 12 is installed on the upper end of the column 11, and the end face of the fixed shaft 12 has baffle fixing screw holes 15. The diameter of the circular baffle 13 is larger than the outer diameter of the fixed shaft 12. The circular baffle 13 has a through hole 16 that corresponds to the baffle fixing screw hole 15 on the end face of the fixed shaft 12. The baffle bolts fix the circular baffle 13 to the end face of the fixed shaft 12. The circular baffle 13 blocks the outside of the rotating arm 6 fitted on the fixed shaft 12 to prevent the rotating arm 6 from detaching from the column 11.

[0035] Figure 1 , 4 The rotating arm 6 is composed of a swing rod 17, a connecting rod 18, and a push rod 19. The swing rod 17 and connecting rod 18 are rectangular tubes. The rear end of the swing rod 17 has a rotating shaft hole 20, which is rotatably connected to the fixed shaft 12 at the upper end of the fixed bracket 5. The rear end of the swing rod 17 is welded to and connected to the upper end of the connecting rod 18. The push rod 19 is a round tube, and its inner end is welded to and connected to the lower end of the connecting rod 18. A sleeve 21 is fitted around the outside of the push rod 19. The inner diameter of the sleeve 21 matches the outer diameter of the push rod 19, and the sleeve 21 and the push rod 19 are in a rotatable fit. The sleeve 21 is in rolling contact with the upper surface of the steel loading machine support arm 1. When the steel loading machine support arm 1 moves, the sleeve 21 pushes the push rod 19 to move. The push rod 19, through the connecting rod 18, drives the rotating shaft hole 20 of the swing rod 17 to swing around the fixed shaft 12 at the upper end of the fixed bracket 5, thereby moving the measuring ruler 7.

[0036] Figure 1 , 4 The display shows that water pipe adapters 8 are welded to the front end of the swing rod 17 and the outer end face of the push rod 19, respectively, and the water pipe adapters 8 are connected to the cooling water pipes 9. Cooling water enters the swing rod 17, connecting rod 18 and push rod 19 through the water pipe adapters 8 to circulate, thereby cooling the swing rod 17, connecting rod 18 and push rod 19 and preventing damage to the swing rod 17, connecting rod 18 and push rod 19 caused by the high temperature of the steel billet.

[0037] Figure 1 , 4The rotating arm 6 has a guide sleeve 22 welded to its front end of the swing rod 17. The guide sleeve 22 is a rectangular tube and is perpendicular to the swing rod 17. The inner diameter of the guide sleeve 22 matches the outer diameter of the measuring ruler 7. The measuring ruler 7 is inserted into the guide sleeve 22, and the measuring ruler 7 and the guide sleeve 22 are in a sliding fit. The rotating arm 6 moves the measuring ruler 7 through the guide sleeve 22.

[0038] Figure 1 , 5 The measuring ruler 7 consists of a measuring rod 23 and a billet stop 24. Both the measuring rod 23 and the billet stop 24 are rectangular tubes, vertically welded together in an L-shape. The end openings of both the measuring rod 23 and the billet stop 24 are sealed with blind flanges. Both ends of the measuring rod 23 are inserted into the inner holes of the guide sleeves 22 at the front ends of the two rotating arms 6, with a sliding fit between the measuring rod 23 and the guide sleeves 22. The side of the measuring rod 23 has scale lines 25 for measuring the length of the billet 3. The billet stop 24 is located in the gap between the billet conveying rollers 2 and can move up and down within this gap. When the billet 3 is conveyed along the billet conveying rollers 2, the billet stop 24 positions the billet 3 at its front end for measurement. Water pipe adapters 8 are welded to both the measuring rod 23 and the billet stop 24, and these adapters are connected to cooling water pipes 9. The cooling water is used to cool the measuring ruler 7.

[0039] Figure 1 , 6 The display shows that at the connection between the measuring scale 7 and the guide sleeve 22 at the front end of the swing arm 17 of the rotating arm 6, there are measuring scale collars 26 and guide sleeve collars 27, respectively. Both measuring scale collars 26 and guide sleeve collars 27 have rectangular inner holes 28. The dimensions of the rectangular inner holes 28 of the measuring scale collars 26 and guide sleeve collars 27 match the external dimensions of the measuring scale 7 and guide sleeve 22, respectively. The rectangular inner holes 28 of the measuring scale collars 26 and guide sleeve collars 27 are respectively fitted onto the outside of the measuring scale 7 and guide sleeve 22. The top surfaces of the measuring scale collars 26 and guide sleeve collars 27 have tightening screw holes 29 that communicate with the rectangular inner holes 28. The tightening bolts are tightened to the outer walls of the measuring scale 7 and guide sleeve 22 through the tightening screw holes 29, respectively. A spring 30 is fitted onto the measuring scale 7 between the measuring scale collar 26 and guide sleeve collar 27, with both ends of the spring 30 connected to the measuring scale collar 26 and guide sleeve collar 27, respectively. During use, the preload of the spring 30 can be adjusted by tightening the bolts to adjust the distance between the measuring scale collar 26 and the guide sleeve collar 27, which is used to reset the measuring scale 7.

[0040] Figure 7 , 8The guide sleeve 22 has an outwardly extending rectangular protrusion 31 on the inner wall of its inner bore. A rectangular groove 32 is formed on the inner side wall of the guide sleeve 22 inside the rectangular protrusion 31. A slider 33 is placed within the rectangular groove 32, and the size of the slider 33 matches the rectangular groove 32. The rectangular protrusion 31 has an adjusting screw hole 34, and the slider 33 has a circular blind hole 35 corresponding to the adjusting screw hole 34 on the rectangular protrusion 31. The adjusting bolt connects the adjusting screw hole 34 on the rectangular protrusion 31 to the circular blind hole 35 on the slider 33. In use, the slider 33 placed on the inner wall of the guide sleeve 22 slides in contact with the side wall of the measuring scale 7. The friction between the slider 33 and the measuring scale 7 can be adjusted by the adjusting bolt, allowing the measuring scale 7 to slowly adhere to and detach from the steel billet 3.

[0041] Figure 1 The camera 36 is mounted on the outside of the end of the measuring ruler 7, corresponding to the scale markings. The camera 36 is aligned with the scale indicator line 25 of the measuring ruler 7, and the camera 36 has a display screen capable of displaying the length of the billet 3. When measuring the length of the billet 3, the length of the billet 3 measured by the measuring ruler 7 can be observed through the display screen of the camera 36.

[0042] Figure 9 The device is located in front of the furnace door 4 of the heating furnace, installed above the steel charging machine support arm 1 and the billet conveying roller table 2, and is used to measure the length of the billet 3 before it enters the furnace. The sleeve 21 of the rotating arm 6 is tangent to the upper surface of the steel charging machine support arm 1 and can roll into contact with it as the steel charging machine support arm 1 moves horizontally. The rotating arm 6 can rotate with the lifting and lowering movement of the steel charging machine support arm 1.

[0043] Figure 10-14 The specific steps for measuring the length of steel billets before they enter the furnace using this invention are as follows:

[0044] The device is in its initial state: the steel loading machine support arm 1 is in its lowest position, the rotating arm 6 and the measuring ruler 7 are located below the billet conveying roller 2, and at this time the billet 3 can be conveyed normally on the billet conveying roller 2.

[0045] The operator issues an instruction to raise the steel loading machine support arm 1 to the middle position. At this time, the upper surface of the steel loading machine support arm 1 is still lower than the roller surface of the billet conveying roller table 2, and the rotating arm 6 and the measuring ruler 7 are located above the billet conveying roller table 2. The billet conveying roller table 2 is started to transport the billet 3 to the furnace door 4 of the heating furnace so that it contacts the billet stop bar 24 of the measuring ruler 7.

[0046] The loading machine support arm 1 is moved laterally a certain distance towards the billet 3 and aligned with the billet 3. The measuring ruler 7 adjusts its position adaptively under the action of the spring 30. At this time, the length dimension can be viewed on the display of the camera 36.

[0047] The operator issues an instruction to raise the steel loading machine support arm 1 so that it contacts the steel billet 3. At this time, the measuring ruler 7 is raised and separated from the steel billet 3. The steel loading machine support arm 1 is raised again. After it is in position, it is moved laterally to load the steel billet 3 into the furnace door 4 of the heating furnace. The steel loading machine support arm 1 is lowered to the lowest position and moved laterally to the original position to complete the length measurement of the steel billet 3.

[0048] An embodiment of this utility model is as follows:

[0049] The base plate 10 of the fixed bracket 5 has a length of 300mm, a width of 250mm, and a thickness of 50mm; the column 11 has a length of 150mm, a width of 100mm, and a height of 800mm; the fixed shaft 12 has a diameter of 40mm and a length of 50mm; and the circular baffle 13 has a diameter of 50mm and a thickness of 5mm.

[0050] The swing arm 17 of the rotating arm 6 has a length of 1100mm, a cross-sectional length of 50mm, a width of 50mm, and a diameter of 40mm for the rotating shaft hole 20.

[0051] The connecting rod 18 of the rotating arm 6 has a length of 580mm, a cross-sectional length of 50mm, and a width of 50mm;

[0052] The diameter of the push rod 19 of the rotating arm 6 is 40mm and the length is 300mm. The outer diameter of the sleeve 21 is 50mm, the inner diameter is 40mm and the length is 250mm.

[0053] The guide sleeve 22 has a length of 300mm, a cross-sectional length of 60mm, and a width of 60mm;

[0054] The measuring rod 23 of the measuring ruler 7 has a length of 3500mm, a cross-sectional length of 50mm, a width of 50mm, and a diameter of 40mm for the rotating shaft hole 20;

[0055] The length of the steel billet stop bar 24 of measuring ruler 7 is 700mm, the cross-sectional length is 50mm, and the width is 50mm;

[0056] The outer diameter of the measuring scale collar 26 is 100mm, and the length and width of the rectangular inner hole 28 are 50mm.

[0057] The outer diameter of the guide sleeve collar 27 is 100mm, and the length and width of the rectangular inner hole 28 are 60mm.

[0058] The diameter of spring 30 is 80mm and the length is 200mm;

[0059] The slider 33 has a length of 35mm, a width of 30mm, a thickness of 5mm, and a diameter of 6mm for the circular blind hole 35;

[0060] The model number of camera 36 is DS-2CD7.

Claims

1. A device for online rapid measurement of the length of steel billets entering the furnace, characterized in that: It includes a fixed bracket (5), a rotating arm (6), a measuring ruler (7), a water pipe adapter (8), and a cooling water pipe (9). The two fixed brackets (5) are fixed on both sides of the steel loading machine support arm (1) in front of the furnace door (4) of the heating furnace. The upper ends of the two fixed brackets (5) are respectively equipped with horizontal fixed shafts (12). The two rotating arms (6) are respectively composed of a swing rod (17), a connecting rod (18), and a push rod (19). The rear ends of the two swing rods (17) are respectively equipped with rotating shaft holes (20) that are rotatably connected to the fixed shafts (12) at the upper ends of the two fixed brackets (5). The front ends of the two swing rods (17) are respectively connected to the two ends of the measuring ruler (7). The measuring ruler (7) is placed horizontally and is connected to the billet conveyor. The two connecting rods (18) are located below the two swing rods (17) respectively and in the same vertical plane. The upper ends of the two connecting rods (18) are fixedly connected to the rear ends of the two swing rods (17). The two connecting rods (18) and the two swing rods (17) have an angle of less than 90 degrees. The lower ends of the two connecting rods (18) are fixedly connected to one end of the two push rods (19). The two push rods (19) are perpendicular to the two swing rods (17). The rod bodies of the two push rods (19) are respectively opposite to the upper surfaces of the two sides of the steel loading machine support arm (1). Water pipe adapters (8) are installed on the rotating arm (6) and the measuring ruler (7) respectively. The water pipe adapters (8) are connected to the cooling water pipes (9).

2. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 1, characterized in that: The fixed bracket (5) consists of a base plate (10), a column (11), a fixing shaft (12), and a circular baffle (13). The base plate (10) has anchor bolt holes (14). The fixing bolts fix the base plate (10) to the feet on both sides of the steel loading machine support arm (1) through the anchor bolt holes (14). The column (11) is an upright rectangular column. The lower end of the column (11) is welded to the base plate (10). The fixing shaft (12) is installed on the column (11). At the upper end of the fixed shaft (12), there is a baffle fixing screw hole (15) on the end face of the fixed shaft (12). The diameter of the circular baffle (13) is larger than the outer diameter of the fixed shaft (12). The circular baffle (13) has a through hole (16) that corresponds to the baffle fixing screw hole (15) on the end face of the fixed shaft (12). The baffle bolts fix the circular baffle (13) to the end face of the fixed shaft (12). The circular baffle (13) blocks the outside of the swing rod (17) mounted on the fixed shaft (12).

3. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 1, characterized in that: The swing rod (17) and connecting rod (18) of the rotating arm (6) are rectangular tubes. The rear end of the swing rod (17) is welded to the upper end of the connecting rod (18) and connected. The push rod (19) is a round tube. The inner end of the push rod (19) is welded to the lower end of the connecting rod (18) and connected. The front end of the swing rod (17) and the outer end face of the push rod (19) are respectively welded to water pipe adapters (8). The water pipe adapters (8) are respectively connected to the cooling water pipes (9). The push rod (19) is fitted with a sleeve (21). The inner diameter of the sleeve (21) matches the outer diameter of the push rod (19). The sleeve (21) and the push rod (19) are in rotational fit. The sleeve (21) and the upper surface of the steel loading machine support arm (1) are in rolling contact.

4. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 1, characterized in that: The swing rod (17) of the rotating arm (6) is welded with a guide sleeve (22) at the front end. The guide sleeve (22) is a rectangular tube and is perpendicular to the swing rod (17). The inner hole size of the guide sleeve (22) matches the outer size of the measuring ruler (7). The measuring ruler (7) is inserted into the guide sleeve (22), and the measuring ruler (7) and the guide sleeve (22) are in sliding fit.

5. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 4, characterized in that: The measuring ruler (7) consists of a measuring rod (23) and a billet stop (24). The measuring rod (23) and the billet stop (24) are rectangular tubes. The measuring rod (23) and the billet stop (24) are vertically welded together in an L-shape. The openings at the ends of the measuring rod (23) and the billet stop (24) are sealed with blind plates. The two ends of the measuring rod (23) are respectively inserted into the inner holes of the guide sleeves (22) at the front ends of the two rotating arms (6). The measuring rod (23) and the guide sleeves (22) are in sliding fit. The measuring rod (23) has scale indicator lines (25) on its side. The gap between the billet stop (24) and the billet conveying roller (2) is opposite. The measuring rod (23) and the billet stop (24) are respectively welded with water pipe adapters (8). The water pipe adapters (8) are respectively connected to the cooling water pipes (9).

6. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 5, characterized in that: The measuring scale (7) and the guide sleeve (22) at the front end of the swing rod (17) of the rotating arm (6) are respectively provided with a measuring scale collar (26) and a guide sleeve collar (27). The measuring scale collar (26) and the guide sleeve collar (27) are respectively provided with rectangular inner holes (28). The dimensions of the rectangular inner holes (28) of the measuring scale collar (26) and the guide sleeve collar (27) are respectively matched with the external dimensions of the measuring scale (7) and the guide sleeve (22). The rectangular inner holes (28) of the measuring scale collar (26) and the guide sleeve collar (27) are respectively The measuring scale (7) and guide sleeve (22) are fitted on the outside. The top surfaces of the measuring scale collar (26) and guide sleeve collar (27) are respectively connected to the rectangular inner hole (28) by tightening screw holes (29). The tightening bolts are tightened to the outer walls of the measuring scale (7) and guide sleeve (22) through the tightening screw holes (29). The spring (30) is fitted on the measuring scale (7) between the measuring scale collar (26) and guide sleeve collar (27). The two ends of the spring (30) are respectively connected to the measuring scale collar (26) and guide sleeve collar (27).

7. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 6, characterized in that: The inner wall of the guide sleeve (22) at one end has a rectangular protrusion (31) facing outward. The inner wall of the guide sleeve (22) forms a rectangular groove (32) on the inner side of the rectangular protrusion (31). A slider (33) is placed in the rectangular groove (32). The size of the slider (33) matches the rectangular groove (32). There is an adjustment screw hole (34) on the rectangular protrusion (31). There is a circular blind hole (35) on the slider (33) corresponding to the adjustment screw hole (34) on the rectangular protrusion (31). The adjustment bolt is connected to the circular blind hole (35) on the slider (33) through the adjustment screw hole (34) on the rectangular protrusion (31).

8. The device for online rapid measurement of the length of steel billets entering the furnace according to claim 1, characterized in that: It also has a camera (36), which is installed on the outside of the corresponding position at the end of the scale indicator line (25) of the measuring ruler (7). The camera (36) is opposite to the scale indicator line (25) of the measuring ruler (7). The camera (36) has a display screen that can display the length of the billet (3).

Images