Device and method for measuring thickness of casting blank

Abstract

The invention belongs to the technical field of continuous casting light and heavy reduction, and particularly relates to a device and method for measuring the thickness of a casting blank. Comprising a support, a first measuring plate, a second measuring plate and a measuring plate adjusting part, the measuring plate adjusting part is in sliding connection with the support, the first measuring plate and the second measuring plate are vertically parallel, and one end of the first measuring plate and one end of the second measuring plate are coupled with the measuring plate adjusting part. During use, a casting blank to be measured is placed between the other end of the first measuring plate and the other end of the second measuring plate, and the distance between the first measuring plate and the second measuring plate is adjusted through the measuring plate adjusting component, so that the casting blank to be measured is measured. And the distance between the first measuring plate and the second measuring plate is the same as the thickness of the casting blank to be measured. By adjusting the distance between the lengthened measuring plates, online accurate measurement of the thickness of the hot casting blank is achieved, meanwhile, scalding and burning are prevented, and the safety risk is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of billet thickness measurement, and specifically relates to a device and a method for measuring billet thickness, and more particularly to a device and a method for measuring billet thickness in a continuous casting line at a medium or long distance. Background Art

[0002] In order to ensure the good internal quality of the ingot, most domestic and foreign steel mills use light and heavy reduction technology during continuous casting. Through mathematical models, the liquid phase hole of the ingot is accurately calculated, and a specific reduction amount is set at a specific straightening machine, so as to achieve the goal of improving the internal quality of the ingot. During continuous casting production, especially for ingots that have been subjected to light or heavy pressure reduction, it is necessary to measure the thickness to determine whether the reduction amount reaches the target value set by the process. At present, the thickness of ingots subjected to light or heavy pressure reduction is often measured with a caliper after the ingots are cooled to room temperature off the line. However, this is likely to cause the outflow of abnormally reduced ingots due to untimely measurement. In addition, there are also simple instruments for online measurement of ingots. For example, the prior art "CN212567220U" proposes a special tool for online measurement of the thickness of ingots subjected to light pressure reduction. The tool requires the user to hold the ingot in close proximity to measure the thickness of the ingot, with the measuring head parallel to the ingot, and the thickness of the ingot is measured by telescoping the sleeve. However, the tool cannot measure the ingot at medium or long distances, and cannot ensure a safe distance between the user and the hot ingot. Therefore, the user cannot stay for a long time, and the measurement accuracy cannot be guaranteed. At the same time, there are also safety risks in close contact with the ingot. Summary of the invention

[0003] The purpose of the present invention is to solve the problem that the online instrument for measuring the billet in the prior art cannot ensure the safe distance between the user and the hot billet, thereby affecting the measurement accuracy and posing a safety risk. Therefore, a device and a method for measuring the thickness of the billet are proposed. The measuring device of the present invention can adjust the distance between the lengthened measuring plates so that the user can keep the hands and face at a safe distance from the hot billet surface during operation, and the thickness can be measured by making the measuring plates directly contact the billet, thereby achieving accurate online measurement of the thickness of the hot billet, while preventing scalds and burns and reducing safety risks.

[0004] A first aspect of the present invention provides a device for measuring the thickness of a cast billet, the device comprising a bracket, a first measuring plate, a second measuring plate and a measuring plate adjusting component, the measuring plate adjusting component being slidably connected to the bracket, the first measuring plate and the second measuring plate being parallel up and down, and one end of the first measuring plate and the second measuring plate being coupled to the measuring plate adjusting component, and the other ends of the first measuring plate and the second measuring plate being away from the measuring plate adjusting component. When in use, the cast billet to be measured is placed between the other ends of the first measuring plate and the second measuring plate, and the distance between the first measuring plate and the second measuring plate is adjusted by the measuring plate adjusting component so that the distance between the first measuring plate and the second measuring plate is the same as the thickness of the cast billet to be measured.

[0005] Preferably, the first measuring plate is detachably fixed to the measuring plate adjusting component, and the second measuring plate is movable up and down on the measuring plate adjusting component.

[0006] More preferably, the measuring plate adjusting component has a hollow structure, the hollow structure is provided with a slide groove, and a measuring plate fixing component and a movable plate are installed inside the hollow structure, the measuring plate fixing component is used to fix the second measuring plate, the lower end of the measuring plate fixing component is in contact with the movable plate, the measuring plate fixing component and the movable plate are both clearance-matched with the hollow structure, and the measuring plate fixing component is moved along the slide groove of the hollow structure by moving the movable plate, and drives the second measuring plate to move up and down.

[0007] Further preferably, the measuring plate adjusting component is provided with a through hole, which is located below the movable plate, and the bolt passes through the through hole and contacts the lower surface of the movable plate. When in use, the bolt is rotated to move the movable plate and the measuring plate fixing component along the slide groove of the hollow structure and drive the second measuring plate to move up and down.

[0008] Further preferably, the measuring plate fixing component includes a fixing frame and two side plates provided with holes, and the two side plates are respectively fixed to the fixing frame through the holes of the side plates and the hollow part of the fixing frame, the two side edges of the side plates are respectively in contact with the two inner walls of the hollow structure, and the bottom edges of the two side plates are in contact with the upper surface of the movable plate. When in use, one end of the second measuring plate is fixed to the hollow part of the fixing frame through the holes of the side plates, and the movable plate is moved to make the side plate move up and down along the slide groove of the hollow structure, thereby driving the second measuring plate to move up and down.

[0009] Further preferably, the bracket includes a base, a screw stud, a screw nut and a sliding sleeve, one end of the screw stud is connected to the base, the screw nut is sleeved on the screw stud, and the screw nut can move up and down, the sliding sleeve is slidably fitted with the screw stud, and the sliding sleeve is connected to the measuring plate adjustment component through a connecting rod.

[0010] More preferably, a measuring rod is installed on the second measuring plate, and the bottom end of the measuring rod is at the same level as the lower surface of the second measuring plate. When in use, the scale corresponding to the bottom end of the measuring rod is used as the reading data.

[0011] More preferably, the other ends of the first measuring plate and the second measuring plate are both equipped with laser lights.

[0012] The second aspect of the present invention proposes a method for measuring the thickness of a cast billet using the above-mentioned measuring device, the method comprising: placing the bracket at a certain distance from the cast billet to be measured, the upper end of the first measuring plate contacts the lower surface of the cast billet to be measured, and adjusting the position of the second measuring plate by a measuring plate adjusting component so that the lower end of the second measuring plate contacts the upper surface of the cast billet to be measured, and the distance between the first measuring plate and the second measuring plate is the thickness of the cast billet to be measured.

[0013] The third aspect of the present invention proposes a method for measuring the thickness of a cast billet using the above-mentioned measuring device, the method comprising: placing a bracket at a certain distance from the cast billet to be measured, the upper end of a first measuring plate being located below the lower surface of the cast billet to be measured, and a first laser ray emitted by a laser lamp installed on the first measuring plate being at the same level as the lower surface of the cast billet to be measured; adjusting the position of the second measuring plate by a measuring plate adjusting component so that a second laser ray emitted by a laser lamp installed on the second measuring plate is at the same level as the upper surface of the cast billet to be measured, and measuring the distance between the first laser ray and the second laser ray.

[0014] In the device and method for measuring the thickness of a casting billet described in the present invention, at least the following are provided:

[0015] Beneficial effects:

[0016] (1) In the present invention, the device for measuring the thickness of the ingot is mainly composed of a fixing bracket, a long measuring plate for measuring the ingot to be measured, and an adjusting component for adjusting the thickness between the measuring plates. The thickness of the ingot at a medium distance is measured by directly contacting the ingot through the measuring plate. The user can always keep a safe distance from the online hot high-temperature ingot, so that the user's hands and face can keep a safe distance from the surface of the hot ingot during operation, thereby preventing scalds and burns and reducing safety risks. At the same time, the ingot thickness measurement of the continuous casting online can be realized, and the measurement error is controlled within ±1mm. It can judge whether the light and heavy pressure parameters are abnormal, thereby solving the problem that the ingot with abnormal pressure may flow out due to untimely thickness measurement;

[0017] (2) In a preferred embodiment, when measuring the thickness of the ingot online at a long distance, a laser lamp is installed on the measuring plate, and the ingot thickness is positioned and measured by the beam of the laser lamp. The device is easy to disassemble and move, and is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of a device for measuring the thickness of a casting in one embodiment of the present invention;

[0019] Figure 2 A three-dimensional partial enlarged view of a device for measuring the thickness of a casting slab according to an embodiment of the present invention;

[0020] Figure 3 It is a schematic structural diagram of a device for measuring the thickness of a casting slab according to an embodiment of the present invention;

[0021] Figure 4 A schematic diagram of the structure of a sliding sleeve and a connecting rod in one embodiment of the present invention, A is a top view, B is a front view, and C is a side view;

[0022] Figure 5 A three-dimensional perspective view of a measuring plate adjustment component according to an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of the structure of a measuring plate adjusting component according to an embodiment of the present invention, A is a front view, B is a side view, and C is a top view;

[0024] Figure 7 A three-dimensional stereogram of a measuring plate fixing component according to an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the structure of a measuring plate fixing component according to an embodiment of the present invention, A is a top view, B is a main view, and C is a side view;

[0026] Fig. 9 This is a schematic diagram of the structure among the first measuring plate, the second measuring plate, the measuring rod and the laser lamp in one embodiment of the present invention.

[0027] Reference numerals

[0028] 1. Bracket; 2. First measuring plate; 3. Second measuring plate; 4. Measuring plate adjusting component; 5. Hollow structure; 6. Measuring plate fixing component; 7. Moving plate; 8. Bolt; 9. Base; 10. Screw stud; 11. Screw nut; 12. Sliding sleeve; 13. Connecting rod; 14. Laser light; 15. Ruler; 16. Measuring rod; 17. Fixing bolt; 18. Fixing frame; 19. Side plate. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] The first aspect of the present invention provides a device for measuring the thickness of a casting, such as Figures 1-2 As shown, the device includes a bracket 1, a first measuring plate 2, a second measuring plate 3 and a measuring plate adjusting component 4, the measuring plate adjusting component 4 is slidably connected to the bracket 1, the first measuring plate 2 and the second measuring plate 3 are parallel to each other, and one end of the first measuring plate 2 and the second measuring plate 3 are coupled to the measuring plate adjusting component 4, and the other ends of the first measuring plate 2 and the second measuring plate 3 are away from the measuring plate adjusting component 4. When in use, the billet to be measured is placed between the other ends of the first measuring plate 2 and the second measuring plate 3, and the distance between the first measuring plate 2 and the second measuring plate 3 is adjusted by the measuring plate adjusting component 4, so that the distance between the first measuring plate 2 and the second measuring plate 3 is the same as the thickness of the billet to be measured.

[0031] In a specific embodiment of the device of the present invention, Figure 3 As shown, the bracket 1 includes a base 9, a screw stud 10, a screw nut 11 and a sliding sleeve 12. One end of the screw stud 10 is connected to the base 9. Specifically, the base 9 is provided with a screw hole. The bottom of the screw stud 10 is screwed into the base 9. The screw nut 11 is sleeved on the screw stud 10, and the screw nut 11 can move up and down on the outer wall of the screw stud 10; the sliding sleeve 12 is hollow, and the sliding sleeve 12 and the screw stud 10 are slidably matched, and the sliding sleeve 12 can move up and down on the outer wall of the screw stud 10.

[0032] like Figure 4 As shown, one end of the connecting rod 13 is fixed to the side wall of the sliding sleeve 12 by welding, and a screw hole matching the bolt 8 is processed on the front of the connecting rod 13. During the actual installation process, the bolt 8 is passed through the screw hole on the connecting rod 13.

[0033] In a specific embodiment of the device of the present invention, the first measuring plate 2 is detachably fixed to the measuring plate adjusting component 4, and the second measuring plate 3 is movable up and down on the measuring plate adjusting component 4. In this article, the material of the first measuring plate 2 and the second measuring plate 3 is 304, the length is 1.5 to 2.0 m, and the thickness is 10 mm.

[0034] In a preferred embodiment of the device of the present invention, Figure 3 , 5 As shown in Figures 6 and 7, the upper part of the measuring plate adjusting component 4 has a hollow structure 5, and the hollow structure 5 is provided with a slide groove. Specifically, the hollow structure 5 is a hollow rectangular parallelepiped structure without the top wall and two side walls. The measuring plate fixing component 6 and the moving plate 7 are installed inside the hollow structure 5. The measuring plate fixing component 6 is used to fix the second measuring plate 3. The lower end of the measuring plate fixing component 6 is in contact with the moving plate 7. The measuring plate fixing component 6 and the moving plate 7 are both clearance-matched with the hollow structure 5. By moving the moving plate 7, the measuring plate fixing component 6 moves along the slide groove of the hollow structure 5, and drives the second measuring plate 3 to move up and down. The clearance fit here means that the outer diameter of the moving plate 7 and the measuring plate fixing component 6 is smaller than the inner diameter of the two side walls of the hollow structure 5 at the upper part of the measuring plate adjusting component 4. The two side walls of the hollow structure 5 can be understood as slide rails. Applying external force can make the moving plate 7 and the measuring plate fixing component 6 slide in the hollow structure 5.

[0035] The measuring plate adjusting component 4 has a rectangular hole in the middle, such as Figure 6 As shown, the connecting rod 13 can be inserted, and at the same time, a through hole with the same diameter as the bolt 8 is processed at the center position of the upper and lower surfaces of the rectangular hole; a through hole is drilled at the lower part of the measuring plate adjusting component 4 and at the same position as the through holes on the upper and lower surfaces of the rectangular hole, and the bolt 8 passes through the through hole at the lower part of the measuring plate adjusting component 4 and the through holes on the upper and lower surfaces of the rectangular hole in sequence until the bolt 8 contacts the lower surface of the moving plate 7. In this article, the bolt 8 is 0.3 to 0.6 mm long. When in use, the bolt 8 is rotated to move the moving plate 7 and the measuring plate fixing component 6 along the inner wall of the hollow structure 5, and drive the second measuring plate 3 to move up and down, and can measure the ingot with a thickness ranging from 135 mm to 400 mm.

[0036] The front end of the lower part of the measuring plate adjusting component 4 is provided with a groove, such as Figure 6 As shown, two holes are provided at the groove, the first measuring plate 2 is inserted into the groove, and the fixing bolts 17 are screwed into the two holes at the groove to fix the first measuring plate 2 at the lower part of the measuring plate adjusting component 4.

[0037] In a specific embodiment of the device of the present invention, Figures 7-8As shown, the measuring plate fixing component 6 includes a fixing frame 18 and two side plates 19 with holes, and the two side plates 19 are respectively fixed to the fixing frame 18 through the holes of the side plates 19 and the hollow part of the fixing frame 18, the two side edges of the side plates 19 are respectively in contact with the two inner walls of the hollow structure 5, and the bottom edges of the two side plates 19 are in contact with the upper surface of the movable plate 7. When in use, one end of the second measuring plate 3 passes through the hole of the side plate 19 and is fixed to the hollow part of the fixing frame 18, and the movable plate 7 is moved so that the side plate 19 moves up and down along the slide groove of the hollow structure 5, thereby driving the second measuring plate 3 to move up and down. Specifically, in this article, the fixing frame 18 is a rectangular tube, and the second measuring plate 3 can be inserted and fixed; the side plate 19 is a rectangular sheet, which can increase the contact area with the hollow structure 5. When the measuring plate fixing component 6 and the movable plate 7 move up and down, the second measuring plate 3 will not have a large angle of forward or backward tilt, ensuring the parallelism of the first measuring plate 2 and the second measuring plate 3.

[0038] In a specific embodiment of the device of the present invention, Figure 3 As shown, a scale 15 is installed on the measuring plate adjustment component 4, and the zero scale line of the scale 15 is at the same level as the upper surface of the first measuring plate 2; Fig. 9 As shown, a measuring rod 16 is installed on the second measuring plate 3, and the bottom end of the measuring rod 16 is at the same level as the lower surface of the second measuring plate 3. When in use, the scale corresponding to the bottom end of the measuring rod 16 is used as the reading data.

[0039] In a specific embodiment of the device of the present invention, when it is necessary to measure a remote online hot cast billet, that is, when the first measuring plate 2 and the second measuring plate 3 cannot directly contact the online cast billet, Fig. 9 As shown, a laser lamp 14 is installed at the other end of the first measuring plate 2 and the second measuring plate 3. Specifically, a hole is bored at the front end center of the other end of the first measuring plate 2 and the second measuring plate 3 for the laser lamp 14 to be inserted. Two laser beams emitted by the laser lamp 14 are parallel to the first measuring plate 2 and the second measuring plate 3 respectively, and the distance between the two laser beams is equal to the distance between the first measuring plate 2 and the second measuring plate 3 + 10 mm.

[0040] The second aspect of the present invention proposes a method for measuring the thickness of a cast billet using the above-mentioned measuring device, the method comprising: placing the bracket 1 at a position having a certain distance from the cast billet to be measured, the upper end of the first measuring plate 2 contacts the lower surface of the cast billet to be measured, adjusting the position of the second measuring plate 3 by the measuring plate adjusting component 4 so that the lower end of the second measuring plate 3 contacts the upper surface of the cast billet to be measured, measuring the distance between the first measuring plate 2 and the second measuring plate 3, and the distance between the first measuring plate 2 and the second measuring plate 3 is the thickness of the cast billet to be measured.

[0041] The third aspect of the present invention proposes a method for measuring the thickness of a cast billet using the above-mentioned measuring device, the method comprising: placing the bracket 1 at a certain distance from the cast billet to be measured, the upper end of the first measuring plate 2 is located below the lower surface of the cast billet to be measured, and the first laser ray emitted by the laser lamp 14 installed on the first measuring plate 2 is at the same level as the lower surface of the cast billet to be measured; adjusting the position of the second measuring plate 3 by the measuring plate adjusting component 4 so that the second laser ray emitted by the laser lamp 14 installed on the second measuring plate 3 is at the same level as the upper surface of the cast billet to be measured, and the distance between the first laser ray and the second laser ray is the thickness of the cast billet to be measured.

[0042] The experimental methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials are obtained from conventional commercial channels or prepared by conventional methods unless otherwise specified.

[0043] Example 1

[0044] A device for measuring the thickness of a cast billet, such as Figures 1 to 9 As shown, the device includes a bracket 1, a first measuring plate 2, a second measuring plate 3 and a measuring plate adjusting component 4, the first measuring plate 2 and the second measuring plate 3 are parallel to each other; the bracket 1 includes a base 9, a screw stud 10, a screw nut 11 and a sliding sleeve 12, the base 9 has a screw hole, the bottom of the screw stud 10 is screwed into the base 9, the screw nut 11 is sleeved on the screw stud 10, and the screw nut 11 can be rotated on the screw stud 10 to move up and down, the sliding sleeve 12 is a hollow structure, and the sliding sleeve 12 and the screw stud 10 are slidably matched, and one end of the connecting rod 13 is fixed to the side wall of the sliding sleeve 12 by welding;

[0045] The upper part of the measuring plate adjusting component 4 has a hollow structure 5, and the hollow structure 5 is a hollow rectangular parallelepiped structure with the top wall and two side walls removed. A measuring plate fixing component 6 and a movable plate 7 are arranged inside the hollow structure 5. The lower end of the measuring plate fixing component 6 contacts the movable plate 7. The measuring plate fixing component 6 includes a fixing frame 18 and two side plates 19 with holes, and the two side plates 19 are respectively fixed to the fixing frame 18 through the holes of the side plates 19 and the hollow part of the fixing frame 18. The two side edges of the side plates 19 are respectively in contact with the two inner walls of the hollow structure 5, and the bottom edges of the two side plates 19 are in contact with the upper surface of the movable plate 7. When in use, one end of the second measuring plate 3 passes through the hole of the side plate 19 to be fixed to the hollow part of the fixing frame 18, and the movable plate 7 is moved so that the side plates 19 are moved along The sliding groove of the hollow structure 5 moves up and down, thereby driving the second measuring plate 3 to move up and down; the middle part of the measuring plate adjusting component 4 has a rectangular hole for the connecting rod 13 to be inserted, and a through hole with the same diameter as the bolt 8 is processed at the center position of the upper and lower surfaces of the rectangular hole; the front end of the lower part of the measuring plate adjusting component 4 is provided with a groove, and two holes are set at the groove. The first measuring plate 2 is inserted into the groove, and the fixing bolt 17 is screwed into the two holes at the groove to fix the first measuring plate 2 to the lower part of the measuring plate adjusting component 4. At the bottom of the measuring plate adjusting component 4, a through hole is provided at the same position as the through hole on the upper and lower surfaces of the rectangular hole. The bolt 8 passes through the through hole at the bottom of the measuring plate adjusting component 4 and the through holes on the upper and lower surfaces of the rectangular hole in sequence until the bolt 8 contacts the lower surface of the moving plate 7;

[0046] A scale 15 is installed on the measuring plate adjusting component 4, and the zero scale line of the scale 15 is at the same level as the upper surface of the first measuring plate 2. A measuring rod 16 is installed on the second measuring plate 3, and the bottom end of the measuring rod 16 is at the same level as the lower surface of the second measuring plate 3.

[0047] Method for measuring the thickness of online ingots of casting streams on both sides: Place the device described in Example 1 behind the fire cutting machine without any equipment obstruction, on a flat ground 0.5 to 2.0 m away from the online ingot, with the first measuring plate 2 located below the lower surface of the ingot, rotate the screw nut 11, and stop when the first measuring plate 2 contacts the lower surface of the ingot. Initially, the position of the second measuring plate 3 is higher than the upper surface of the ingot, rotate the bolt 8 to move the movable plate 7 and the measuring plate fixing component 6 downward, and stop when the second measuring plate 3 contacts the upper surface of the ingot. At this time, the distance between the first measuring plate 2 and the second measuring plate 3 is the actual thickness of the ingot, and the reading is the scale value corresponding to the lower surface of the second measuring plate 3.

[0048] Example 2

[0049] The device described in Example 1 is implemented, except that Figure 3As shown, a hole is bored at the front center of the other end of the first measuring plate 2 and the second measuring plate 3 for the laser lamp 14 to be inserted.

[0050] Method for measuring thickness of online ingot with non-two-sided casting stream: Place the device described in Example 2 on a flat ground behind the fire cutting machine without any equipment blocking it, with the first measuring plate 2 located below the lower surface of the ingot, rotate the screw nut 11, and stop when the laser beam emitted by the laser lamp 14 located on the first measuring plate 2 just hits the lower surface of the ingot, rotate the bolt 8 to move the movable plate 7 and the measuring plate fixing component 6, and stop when the laser beam emitted by the laser lamp 14 located on the second measuring plate 3 just hits the upper surface of the ingot. At this time, the two laser beams are parallel to the lower surface of the second measuring plate 3 and the upper surface of the first measuring plate 2, and the distance between the two laser beams (the scale scale corresponding to the lower surface of the second measuring plate 3 + 10 mm) is the thickness of the ingot.

[0051] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A device for measuring the thickness of a cast slab, characterized in that: The device comprises a bracket (1), a first measuring plate (2), a second measuring plate (3) and a measuring plate adjusting component (4); the measuring plate adjusting component (4) is slidably connected to the bracket (1); the first measuring plate (2) and the second measuring plate (3) are parallel to each other in the vertical direction; one end of each of the first measuring plate (2) and the second measuring plate (3) is coupled to the measuring plate adjusting component (4); the other ends of each of the first measuring plate (2) and the second measuring plate (3) are away from the measuring plate adjusting component (4); when in use, a casting to be measured is placed between the other ends of the first measuring plate (2) and the second measuring plate (3); and the distance between the first measuring plate (2) and the second measuring plate (3) is adjusted by the measuring plate adjusting component (4) so ​​that the distance between the first measuring plate (2) and the second measuring plate (3) is the same as the thickness of the casting to be measured.

2. The device for measuring the thickness of a casting according to claim 1, characterized in that: The first measuring plate (2) is detachably fixed to the measuring plate adjusting component (4), and the second measuring plate (3) is movable up and down on the measuring plate adjusting component (4).

3. The device for measuring the thickness of a casting according to claim 2, characterized in that: The measuring plate adjusting component (4) has a hollow structure (5) having a slide groove, and a measuring plate fixing component (6) and a movable plate (7) are installed inside the hollow structure (5). The measuring plate fixing component (6) is used to fix the second measuring plate (3). The lower end of the measuring plate fixing component (6) is in contact with the movable plate (7). The measuring plate fixing component (6) and the movable plate (7) are both in clearance fit with the hollow structure (5). By moving the movable plate (7), the measuring plate fixing component (6) moves along the slide groove of the hollow structure (5), and drives the second measuring plate (3) to move up and down.

4. The device for measuring the thickness of a casting according to claim 3, characterized in that: The measuring plate adjusting component (4) is provided with a through hole, which is located below the movable plate (7). A bolt (8) passes through the through hole and contacts the lower surface of the movable plate (7). When in use, the bolt (8) is rotated to move the movable plate (7) and the measuring plate fixing component (6) along the slide groove of the hollow structure (5), thereby driving the second measuring plate (3) to move up and down.

5. The device for measuring the thickness of a casting according to claim 4, characterized in that: The measuring plate fixing component (6) comprises a fixing frame (18) and two side plates (19) provided with holes, and the two side plates (19) are respectively fixed to the fixing frame (18) through the holes of the side plates (19) and the hollow part of the fixing frame (18), the two side edges of the side plates (19) are respectively in contact with the two inner walls of the hollow structure (5), and the bottom edges of the two side plates (19) are in contact with the upper surface of the movable plate (7). When in use, one end of the second measuring plate (3) passes through the hole of the side plate (19) and is fixed to the hollow part of the fixing frame (18), and the movable plate (7) is moved so that the side plate (19) moves up and down along the slide groove of the hollow structure (5), thereby driving the second measuring plate (3) to move up and down.

6. The device for measuring the thickness of a casting according to claim 5, characterized in that: The support (1) comprises a base (9), a screw stud (10), a screw nut (11) and a sliding sleeve (12); one end of the screw stud (10) is connected to the base (9); the screw nut (11) is sleeved on the screw stud (10), and the screw nut (11) can move up and down; the sliding sleeve (12) is slidably matched with the screw stud (10); and the sliding sleeve (12) is connected to the measuring plate adjustment component (4) via a connecting rod (13).

7. The device for measuring the thickness of a casting according to claim 6, characterized in that: A measuring rod (16) is mounted on the second measuring plate (3), the bottom end of the measuring rod (16) being at the same level as the lower surface of the second measuring plate (3); when in use, the scale corresponding to the bottom end of the measuring rod (16) is used as the reading data.

8. The device for measuring the thickness of a casting slab according to claim 7, characterized in that: The other ends of the first measuring plate (2) and the second measuring plate (3) are both equipped with laser lamps (14).

9. A method for measuring the thickness of a casting according to any one of claims 1 to 7, characterized in that: The method includes: The support (1) is placed at a certain distance from the cast billet to be measured, the upper end of the first measuring plate (2) contacts the lower surface of the cast billet to be measured, and the position of the second measuring plate (3) is adjusted by a measuring plate adjusting component (4) so ​​that the lower end of the second measuring plate (3) contacts the upper surface of the cast billet to be measured, and the distance between the first measuring plate (2) and the second measuring plate (3) is the thickness of the cast billet to be measured.

10. A method for measuring the thickness of a casting according to the device of claim 8, characterized in that: The method includes: The support (1) is placed at a certain distance from the cast billet to be measured, the upper end of the first measuring plate (2) is located below the lower surface of the cast billet to be measured, and the first laser beam emitted by the laser lamp (14) installed on the first measuring plate (2) is located at the same level as the lower surface of the cast billet to be measured; The position of the second measuring plate (3) is adjusted by a measuring plate adjusting component (4) so ​​that a second laser beam emitted by a laser lamp (14) mounted on the second measuring plate (3) is at the same level as the upper surface of the ingot to be measured, and the distance between the first laser beam and the second laser beam is the thickness of the ingot to be measured.

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