Foreign matter blocking device of thickness gauge and rolling mill system

Abstract

The utility model provides a foreign matter blocking device of a thickness gauge and a rolling mill system, and relates to the technical field of steel rolling production equipment. The foreign matter blocking device comprises a main body, an air outlet piece and an air source, the main body is used for being arranged above a ray outlet of the thickness gauge and allowing rays of the thickness gauge to pass through, a slide way is formed on the top surface of the main body, and the slide way is obliquely arranged from the first end to the second end from top to bottom; the air outlet piece is arranged close to the first end and used for blowing air from the first end to the second end along the surface of the sliding way. The air source is connected with the air outlet piece and used for conveying high-pressure air to the air outlet piece. According to the foreign matter blocking device of the thickness gauge, foreign matters such as scale and strip steel fragments falling from strip steel can be received through the slide way, and the foreign matters are blown to the side through the air outlet piece, so that the foreign matters are prevented from blocking X-rays emitted from the ray outlet of the thickness gauge, the accuracy of strip steel thickness measurement is further improved, the quality control of products is facilitated, and the production efficiency is improved. And the practical value is high.

Description

Technical Field

[0001] This utility model relates to the technical field of steel rolling production equipment, and more specifically, to a foreign object blocking device for a thickness gauge and a rolling mill system. Background Technology

[0002] X-ray thickness gauges utilize the property that the change in X-ray intensity as X-rays penetrate a material being measured is related to the material's thickness, thereby determining the material's thickness. X-ray thickness gauges are commonly used in rolling mill thickness control systems to assist the mill in outputting strip steel of the required thickness.

[0003] In related technologies, thickness gauges are equipped with X-ray exits that emit X-rays vertically to measure the thickness of strip steel passing above the exit. However, during hot rolling production, large-sized iron oxide scale, strip fragments, and other foreign objects often fall onto the X-ray exit as the strip steel passes above it, obstructing the X-rays and causing abnormal strip thickness measurements. This, in turn, leads to problems such as abnormal AGC control actions on the rolling mill and strip steel products failing to meet quality requirements. Utility Model Content

[0004] The technical problem solved by this utility model is that foreign objects falling from the strip during the hot rolling process can block the X-ray exit of the thickness gauge, leading to abnormal strip thickness measurement.

[0005] To address the aforementioned problems, this utility model provides a foreign object blocking device for a thickness gauge, comprising a main body, an air outlet, and an air source. The main body is positioned above the ray outlet of the thickness gauge, allowing the ray from the thickness gauge to pass through. A slide is formed on the top surface of the main body, and the slide is inclined downwards from a first end to a second end. The air outlet is positioned near the first end of the slide and is used to blow air along the surface of the slide from the first end to the second end. The air source is connected to the air outlet and is used to supply high-pressure gas to the air outlet.

[0006] Optionally, the air outlet of the air outlet component has a slit-shaped structure and the length extension direction of the slit is consistent with the width direction of the slide.

[0007] Optionally, the width of the slide and the horizontal lateral length of the air outlet are both greater than the width of the ray outlet.

[0008] Optionally, the main body is a hollow structure with an open bottom.

[0009] Optionally, the main body is a right-angled trapezoidal structure, including a top plate, a front side plate, a rear side plate, a left side plate, and a right side plate. The top plate is inclined to serve as the slide, and the front side plate, the rear side plate, the left side plate, and the right side plate are respectively connected to the four sides of the top plate.

[0010] Optionally, the thickness of the top plate is less than 1 mm.

[0011] Optionally, the foreign object blocking device of the thickness gauge further includes a bracket, which is located on one side of the main body and is used to fix the air outlet component. The bracket is a telescopic structure for adjusting the height of the air outlet component.

[0012] Optionally, the air outlet is rotatably connected to the bracket.

[0013] Optionally, the bracket includes a vertical rod and a horizontal rod. The vertical rod includes an inner rod and an outer rod. The bottom end of the inner rod is inserted into the outer rod from the top end of the outer rod. The outer rod is provided with an adjusting bolt for fixing the inner rod. The horizontal rod is fixedly connected to the inner rod. The air outlet is rotatably connected to the horizontal rod by a clamp.

[0014] On the other hand, the present invention also provides a rolling mill system, including a thickness gauge, a roller for outputting strip steel, and a foreign object blocking device for the thickness gauge as described in any one of the above claims. The foreign object blocking device for the thickness gauge is located above the ray outlet of the thickness gauge and below the roller of the rolling mill system.

[0015] The foreign object blocking device of this thickness gauge can block the X-ray exit between the strip and the gauge, preventing foreign objects such as iron oxide scale and strip fragments from falling directly to the X-ray exit and instead causing them to fall onto the slide. By incorporating an air outlet, high-pressure gas from the air source is blown along the slide surface from the first end to the second end. The slide is tilted downwards from the first to the second end, causing foreign objects falling onto the slide surface to move or roll off towards the second end under the combined action of gravity and wind force. This prevents foreign objects from obstructing the X-rays emitted from the X-ray exit, thereby improving the accuracy of strip thickness measurement in the rolling mill system. Attached Figure Description

[0016] Figure 1 This is a front view of a foreign object blocking device of a thickness gauge according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 Side view of the foreign object blocking device of the thickness gauge;

[0018] Figure 3 for Figure 1 Top view of the foreign object blocking device of the thickness gauge;

[0019] Figure 4 This is a partial structural schematic diagram of a rolling mill system according to an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10-Main body; 11-Slide track; 12-Top plate; 13-Front side plate; 14-Left side plate; 15-Right side plate; 20-Air outlet; 21-Air outlet; 22-Air inlet; 30-Bracket; 311-Inner rod; 321-Outer rod; 313-Adjusting bolt; 32-Crossbar; 321-Clamp; 201-Upper arm; 202-Lower arm; 203-Connecting arm; 204-X-ray outlet; 205-Idler roller. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] It should be noted that in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Terms such as "top," "bottom," "front," "rear," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0024] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] In existing technologies, foreign objects falling from the strip can obstruct the X-ray exit of the thickness gauge, leading to abnormal strip thickness measurements.

[0026] To resolve the above technical issues, please refer to [link / reference]. Figures 1 to 3 On the one hand, this utility model embodiment provides a foreign object blocking device for a thickness gauge, including a main body 10, an air outlet 20, and an air source (not shown in the figure).

[0027] The main body 10 has a slide 11 formed on its top surface. The slide 11 is inclined from top to bottom from the first end to the second end. The air outlet 20 is located near the first end of the slide 11 and is used to blow air along the surface of the slide 11 from the first end to the second end. The air source is connected to the air outlet 20 and is used to deliver high-pressure gas to the air outlet 20.

[0028] It should be noted that the foreign object blocking device of this thickness gauge is positioned above the X-ray outlet 204 of the thickness gauge during use, while allowing the X-rays of the thickness gauge to pass through. Please refer to [link / reference]. Figure 4 Thickness gauges typically have a C-shaped frame structure, specifically including an upper arm 201 and a lower arm 202 vertically opposed to each other, and a connecting arm 203 connecting the upper arm 201 and the lower arm 202. An X-ray outlet 204 is located in the lower arm 202 for upward X-ray emission. The upper arm 201 is equipped with a detector to receive X-ray signals. When X-rays pass through the material to be tested located between the upper arm 201 and the lower arm 202, the intensity of the X-rays is attenuated to a certain extent. By analyzing the received X-ray intensity, the thickness of the measured material can be inferred. In the strip steel production process, the thickness gauge is located at the exit of the rolling mill system. The strip steel output from the rolling mill can be supported by rollers 205 and transported to the next process. During this process, the strip steel passes through the space between the upper arm 201 and the lower arm 202 of the thickness gauge and its thickness is measured by X-rays emitted from the X-ray outlet 204.

[0029] In this embodiment, the foreign object blocking device of the thickness gauge can be fixed on the lower arm 202 and block the X-ray exit 204, so that foreign objects such as iron oxide scale and strip fragments falling off the strip will not fall directly at the X-ray exit 204 and block the X-rays, but will fall onto the slide 11. The air outlet 20 blows air from the first end of the slide 11 to the second end. Since the slide 11 is inclined from top to bottom from the first end to the second end, under the combined action of gravity and wind, foreign objects falling on the surface of the slide 11 will move or roll off to the second end of the slide 11, avoiding foreign objects blocking the X-ray exit 204 and the strip, thereby improving the accuracy of strip thickness measurement.

[0030] It should be noted that the main body 10 will also block the X-rays emitted from the X-ray outlet 204. When the X-rays pass through the main body 10, the intensity of the X-rays will be attenuated due to the absorption and scattering of the X-rays by the material of the main body 10. When the position and material of the main body 10 remain unchanged, the attenuation intensity of the X-rays after passing through the main body 10 is a fixed value. By correcting the intensity of the X-rays received by the detector, it will not affect the thickness gauge's measurement of the strip thickness.

[0031] Furthermore, the air outlet 21 of the air outlet component 20 has a slit-shaped structure, and the length extension direction of the slit is consistent with the width direction of the slide 11. In the illustrated embodiment, the extension direction from the first end to the second end of the slide 11 is defined as the length direction of the slide 11, and the direction perpendicular to its length in the plane containing the slide 11 is defined as the width direction of the slide 11 (i.e., Figure 3 (Left and right directions). By designing the air outlet 21 as a slit structure, the airflow blown out of the air outlet 21 can form a high-speed airflow curtain, which has the advantages of strong wind and large blowing area. By setting the length extension direction of the slit to be consistent with the width direction of the slide 11, the airflow blown out of the air outlet 21 flows towards the second end of the slide 11 after landing on the surface of the slide 11, which is conducive to blowing foreign objects towards the second end at the optimal force angle; at the same time, the distance between each position of the air outlet 21 and the surface of the slide 11 is consistent, that is, the wind force of the airflow blown out of each position of the air outlet 21 when landing on the surface of the slide 11 is consistent, which is conducive to blowing away foreign objects that have landed at different positions on the surface of the slide 11.

[0032] Preferably, the width of the slide 11 and the horizontal length of the air outlet 21 are both greater than the width of the X-ray outlet 204. The X-ray outlet 204 is generally circular, and its width is its diameter. By setting the width of the slide 11 to be greater than the width of the X-ray outlet 204, the slide 11 can completely block the X-ray outlet 204, and foreign objects falling on both sides of the slide 11 will not obstruct the X-rays. By setting the horizontal length of the air outlet 21 to be greater than the width of the X-ray outlet 204, foreign objects falling on the slide 11 and located directly above the X-ray outlet 204 can be swept away by the airflow from the air outlet 21, preventing foreign objects on the slide 11 from obstructing the X-rays.

[0033] In some embodiments, the main body 10 can be a hollow structure with an open bottom. As mentioned earlier, the main body 10 also blocks the X-rays emitted from the X-ray outlet 204, causing the intensity of the X-rays to attenuate. To avoid the X-ray intensity being too low after passing through the main body 10, resulting in unstable X-ray intensity signals, the main body 10 is designed as a hollow structure with an open bottom, so that only the slide 11 at the top of the main body 10 blocks the X-rays, thereby reducing the attenuation intensity of the X-rays when passing through the main body 10 and improving measurement accuracy.

[0034] In the illustrated embodiment, the main body 10 can be a right-angled trapezoidal structure, with two opposite faces being right-angled trapezoids of equal size, and the other four faces connecting the two right-angled trapezoidal faces being rectangles. Specifically, the main body 10 includes a top plate 12, a front side plate 13, a rear side plate, a left side plate 14, and a right side plate 15. The front side plate 13 and the rear side plate respectively form two right-angled trapezoidal faces of the right-angled trapezoidal body. The top plate 12 forms a face connecting the hypotenuses of the two right-angled trapezoidal faces. The left side plate 14 and the right side plate 15 respectively form two faces connecting the parallel sides of the two right-angled trapezoidal faces. The bottom of the main body 10 is open. Thus, the top plate 12 is inclined to serve as the aforementioned slide 11. The front side plate 13, the rear side plate, the left side plate 14, and the right side plate 15 are respectively connected to the four sides of the top plate 12 to support the four sides of the top plate 12, so that the main body 10 can be stably placed on a plane, and the top plate 12 is not easily deformed or collapsed when receiving falling debris.

[0035] Preferably, the material of the main body 10 allows X-rays to pass through, and can be made of metals such as titanium alloy or aluminum alloy, which are lightweight, strong, and not easily deformed. The thickness of the top plate 12, i.e., the slide 11, is preferably less than 1 mm to further reduce the attenuation intensity of the X-rays when passing through the top plate 12 and improve the measurement accuracy.

[0036] Of course, in other embodiments, the main body 10 can also be other structures, as long as it can stably support the slide 11 and shield the strip steel and the radiation outlet 204. For example, the main body 10 may include an inclined top plate 12 and four legs, the top plate 12 forming the aforementioned slide 11, and the four legs distributed on the bottom side of the top plate 12 to support the top plate 12.

[0037] In some embodiments, an air outlet 20 has an air cavity formed within it, and an air outlet 21 communicates with the air cavity. The air outlet 20 also has an air inlet 22 communicating with the air cavity, and an air source is connected to the air inlet 22 via a pipe. Thus, high-pressure gas output from the air source enters the air cavity through the air inlet 22 and is then blown out through the air outlet 21. By setting the air cavity and the air outlet 21, the flow rate and shape of the airflow can be controlled. Gas filling the air cavity before being blown out through the air outlet 21 helps maintain a consistent airflow throughout the slit-shaped air outlet 21. The air source can be one of a booster pump, a compressed air unit, or a gas cylinder, or other equipment capable of generating high-pressure gas; no limitations are imposed here.

[0038] In some embodiments, the foreign object blocking device of the thickness gauge may further include a bracket 30, which is disposed on one side of the main body 10 and used to fix the air outlet component 20. The bracket 30 may be a telescopic structure for adjusting the height of the air outlet component 20. Furthermore, the air outlet component 20 is rotatably connected to the bracket 30. Thus, by operating the bracket 30 to extend or retract, the height position of the air outlet component 20 relative to the main body 10 can be adjusted; by operating the air outlet component 20 to rotate relative to the bracket 30, the airflow blowing angle of the air outlet 21 relative to the slide rail 11 can be adjusted. Depending on the structure of the thickness gauge, the placement position of the bracket 30 may be restricted, such as only being able to be placed at a position far from the main body 10 or on a horizontal plane not at the same height as the main body 10. In this case, the extension and retraction height of the bracket 30 and the rotation angle of the air outlet component 20 relative to the bracket 30 can be adjusted so that the air outlet 21 of the air outlet component 20 can always face the appropriate position of the slide rail 11 and blow at an appropriate blowing angle, improving the applicability of the air outlet component 20 in different external environments.

[0039] Specifically, in the illustrated embodiment, the bracket 30 may include a vertical rod and a horizontal rod 32. The vertical rod includes an inner rod 311 and an outer rod 312. The bottom end of the inner rod 311 is inserted into the outer rod 312 from the top end of the outer rod 312. The outer rod 312 is provided with an adjusting bolt 313 for fixing the inner rod 311. The horizontal rod 32 is fixedly connected to the inner rod 311. The air outlet 20 is rotatably connected to the horizontal rod 32 via a clamp 321. The inner rod 311 can slide up and down inside the body of the outer rod 312. The adjusting bolt 313 is threadedly connected to the outer rod 312. By tightening the adjusting bolt 313, the end of the adjusting bolt 313 abuts against the inner rod 311, thereby fixing the inner rod 311. When the height of the air outlet 20 needs to be adjusted, the adjusting bolt 313 can be loosened to control the inner rod 311 to slide up or down relative to the outer rod 312. After the inner rod 311 drives the crossbar 32 and the air outlet 20 to move up and down to a suitable position, the adjusting bolt 313 is tightened to fix the inner rod 311, thus completing the adjustment of the height of the air outlet 20. The air outlet 20 is connected to the crossbar 32 by several clamps 321. When the blowing angle of the air outlet 20 needs to be adjusted, the clamps 321 can be loosened to control the air outlet 20 to rotate relative to the crossbar 32 to a suitable position, and then the clamps 321 are tightened to fix the air outlet 20, thus completing the adjustment of the blowing angle of the air outlet 20.

[0040] Understandably, this embodiment does not limit the specific structure of the bracket 30 or the connection structure between the air outlet 20 and the bracket 30. In other embodiments, the bracket 30 may also be other structures that can realize telescopic function, such as a multi-point fixed slide rail structure; the air outlet 20 and the crossbar 32 may also be connected by other rotating structures, such as by a lockable rotary joint.

[0041] On the other hand, this utility model embodiment also provides a rolling mill system, including a thickness gauge, a support roller 205 for outputting strip steel, and a foreign object blocking device for the thickness gauge described in the above embodiment. The foreign object blocking device is located above the ray outlet 204 of the thickness gauge and below the support roller 205 of the rolling mill system. Since this rolling mill system adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0042] In summary, the foreign object blocking device of the thickness gauge of this utility model and the rolling mill system equipped with the foreign object blocking device can receive foreign objects such as iron oxide scale and strip fragments falling off the strip and blow them to the side through the air outlet 20, so as to avoid the foreign objects blocking the X-rays emitted from the X-ray outlet 204 of the thickness gauge, improve the accuracy of strip thickness measurement, and facilitate the quality control of product production, thus having great practical value.

[0043] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A foreign object blocking device for a thickness gauge, characterized in that, include: The main body (10) is used to be set above the ray outlet (204) of the thickness gauge and allows the ray of the thickness gauge to pass through. A slide (11) is formed on the top surface of the main body (10). The slide (11) is inclined from top to bottom from the first end to the second end. An air outlet (20) is disposed near the first end of the slide rail (11), and the air outlet (20) is used to blow air along the surface of the slide rail (11) from the first end to the second end; A gas source is connected to the air outlet (20) and is used to deliver high-pressure gas to the air outlet (20).

2. The foreign object blocking device for the thickness gauge according to claim 1, characterized in that, The air outlet (21) of the air outlet component (20) has a slit-shaped structure and the length extension direction of the slit is consistent with the width direction of the slide (11).

3. The foreign object blocking device for the thickness gauge according to claim 2, characterized in that, The width of the slide (11) and the length of the air outlet (21) are both greater than the width of the ray outlet (204).

4. The foreign object blocking device for the thickness gauge according to claim 1, characterized in that, The main body (10) is a hollow structure with an open bottom.

5. The foreign object blocking device for the thickness gauge according to claim 4, characterized in that, The main body (10) is a right-angled trapezoidal structure, including a top plate (12), a front side plate (13), a rear side plate, a left side plate (14), and a right side plate (15). The top plate (12) is inclined to serve as the slide (11). The front side plate (13), the rear side plate, the left side plate (14), and the right side plate (15) are respectively connected to the four sides of the top plate (12).

6. The foreign object blocking device for the thickness gauge according to claim 5, characterized in that, The thickness of the top plate (12) is less than 1 mm.

7. The foreign object blocking device for the thickness gauge according to claim 1, characterized in that, It also includes a bracket (30) located on one side of the main body (10) for fixing the air outlet (20). The bracket (30) is a telescopic structure for adjusting the height of the air outlet (20).

8. The foreign object blocking device for the thickness gauge according to claim 7, characterized in that, The air outlet (20) is rotatably connected to the bracket (30).

9. The foreign object blocking device for the thickness gauge according to claim 8, characterized in that, The bracket (30) includes a vertical rod and a horizontal rod (32). The vertical rod includes an inner rod (311) and an outer rod (312). The bottom end of the inner rod (311) is inserted into the outer rod (312) from the top end of the outer rod (312). The outer rod (312) is provided with an adjusting bolt (313) for fixing the inner rod (311). The horizontal rod (32) is fixedly connected to the inner rod (311). The air outlet (20) is rotatably connected to the horizontal rod (32) by a clamp (321).

10. A rolling mill system, characterized in that, The device includes a thickness gauge, a roller (205) for outputting strip steel, and a foreign object blocking device for the thickness gauge according to any one of claims 1-9, wherein the foreign object blocking device is located above the ray outlet (204) of the thickness gauge and below the roller (205) of the rolling mill system.

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