Tool for measuring flatness of coil base of silicon steel high-temperature annealing furnace

Abstract

A flatness measuring tool for a silicon steel high-temperature annealing furnace platform is characterized in that a plurality of gas pipes are distributed on a platform surface of the furnace platform at intervals, the measuring tool comprises a base with a through hole in the middle, the inner diameter of the through hole is matched with the outer diameter of the gas pipe, and the bottom surface of the base is a plane matched with the platform surface; the longitudinal supporting frame is rotationally mounted on the base; the transverse sliding rail comprises a sliding rod parallel to the bottom face of the base, a connecting part is arranged on the sliding rod, and the connecting part is connected with the longitudinal supporting frame; the measuring assembly is slidably mounted on the sliding rod on one side of the connecting part, and a measuring head of the measuring assembly acts with a measuring point on the table top and is used for measuring the distance between the measuring point and the sliding rod; wherein the longitudinal support frame rotates relative to the base and is used for driving the measuring assembly to rotate around the through hole; the measuring assembly slides relative to the sliding rod and is used for changing the distance between the measuring assembly and the through hole. Therefore, reasonable distribution of measurement points is facilitated, the measurement precision is ensured, manpower is saved, and the measurement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of silicon steel manufacturing, in particular to a tool for measuring the flatness of a furnace table of a silicon steel high-temperature annealing furnace. Background Art

[0002] In the silicon steel production process, high temperature annealing is a very important process. Usually, silicon steel is placed vertically in a high temperature annealing furnace in a coiled form. The silicon steel is oriented silicon steel. The flatness of the furnace directly affects the quality of silicon steel products. Therefore, accurate measurement of the flatness of the furnace is very important.

[0003] The traditional furnace table measurement method is mainly to use a horizontal ruler or a laser level for measurement. When using a ruler for measurement, it is difficult to reasonably control the distribution of measurement points, the measurement accuracy is low, and no data for analysis can be obtained; when using a laser level for measurement, although reasonably distributed point data can be obtained, the laser beam has a certain width (about 1-2mm), which is restricted by human factors, resulting in low measurement accuracy, which can generally only be controlled within 1-2mm.

[0004] When using the above two measurement methods, the number of measurements and the amount of data are usually increased to improve the reliability of the measurement through repeated measurements. At the same time, different measurement personnel are set for the same data, and the measurement data is sampled regularly. These measurement methods are inconvenient to operate and consume a lot of manpower and time. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a tool for measuring the flatness of a silicon steel high-temperature annealing furnace, thereby facilitating the reasonable distribution of measurement points, ensuring measurement accuracy while saving manpower and improving measurement efficiency.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A tool for measuring the flatness of a furnace table of a silicon steel high-temperature annealing furnace, wherein a plurality of air pipes are spaced apart on the table surface of the furnace table, and each air pipe is perpendicular to the table surface. The measuring tool comprises:

[0008] A base, wherein a through hole is provided in the middle of the base, the inner diameter of the through hole matches the outer diameter of the air pipe, and the bottom surface of the base is a plane matching the table top;

[0009] A longitudinal support frame, the longitudinal support frame is rotatably mounted on the base;

[0010] A transverse slide rail, the transverse slide rail comprising a slide bar parallel to the bottom surface of the base, the slide bar being provided with a connecting portion, the connecting portion being connected to the longitudinal support frame;

[0011] A measuring component, wherein the measuring component is slidably mounted on a slide bar at one side of the connecting portion, and a measuring head of the measuring component acts on a measuring point on the table to measure a distance between the measuring point and the slide bar;

[0012] Wherein, the longitudinal support frame rotates relative to the base to drive the measuring component to rotate around the through hole; the measuring component slides relative to the sliding rod to change the distance between the measuring component and the through hole.

[0013] As a further improvement of the above technical solution:

[0014] The structure of the base is:

[0015] It comprises a bottom plate, a tubular mounting portion is arranged in the middle of the bottom plate, the inner hole of the mounting portion is a through hole, the through hole passes through the bottom plate, the axis of the through hole is perpendicular to the bottom surface of the base, and the longitudinal support frame is rotatably mounted on the mounting portion.

[0016] The structure of the longitudinal support frame is:

[0017] It includes a first connecting ring and a second connecting ring rotatably mounted on the base, and also includes multiple longitudinal slide rails perpendicular to the bottom surface of the base, the multiple longitudinal slide rails are evenly distributed in an array with the through hole as the center, one end of the multiple longitudinal slide rails is fixedly connected to the first connecting ring at the same time, and the other end of the multiple longitudinal slide rails is fixedly connected to the second connecting ring at the same time, the inner hole of the first connecting ring, the inner hole of the second connecting ring and the space between the multiple longitudinal slide rails form a channel for avoiding the trachea, and the multiple longitudinal slide rails are connected to the connecting part at the same time.

[0018] It also includes a bearing, the inner ring of the bearing is concentric with the through hole, and the longitudinal support frame is rotatably mounted on the base through the bearing.

[0019] The connecting portion is slidably matched with the longitudinal support frame, and further comprises a limiting member, wherein the connecting portion and the longitudinal support frame are simultaneously matched with the limiting member to limit the relative distance between the sliding rod and the table top.

[0020] The limiting member is a manual clamp, which is detachably fixedly connected to the longitudinal support frame, and one end of the manual clamp supports the connecting part so that the relative distance between the sliding rod and the table surface remains unchanged.

[0021] The connecting part includes an avoidance ring arranged on the sliding rod, the inner hole of the avoidance ring corresponds to the trachea, the outer circumference of the avoidance ring is provided with a plurality of perforations, the plurality of perforations are evenly distributed with the through hole as the center, and the plurality of perforations are slidably matched with the longitudinal support frame.

[0022] It also includes a balancing piece arranged on the sliding rod, and the balancing piece and the measuring component are respectively located on two sides of the connecting part.

[0023] The structure of the measuring component is:

[0024] It comprises a ruler seat slidably mounted on the slide rod, wherein the ruler seat is provided with a slide groove, a main ruler is slidably mounted in the slide groove, the axis of the main ruler is perpendicular to the bottom surface of the base, one end of the main ruler is a measuring head, and the measuring head is in the shape of a pen tip.

[0025] The slide groove is provided with a zero line corresponding to the scale on the main scale, and one side of the zero line is provided with a secondary scale corresponding to the scale on the main scale, and the secondary scale is ten degrees, twenty degrees or fifty degrees.

[0026] The beneficial effects of the utility model are as follows:

[0027] The utility model has a compact and reasonable structure and is easy to operate. A measuring tool is positioned and placed by arranging a base that matches the table top and the air pipe of the furnace table. A longitudinal support frame is rotatably installed on the base, and a measuring component is slidably installed on a transverse slide rail, so that the measuring points are easy to adjust, and the reasonable distribution of the measuring points is controllable, thereby improving the measuring accuracy. At the same time, the operation is simple and convenient for one person to operate, thus saving manpower and improving the measuring efficiency.

[0028] The utility model also has the following advantages:

[0029] (1) A plurality of longitudinal slide rails are evenly distributed in an array with the through hole as the center, so that the longitudinal support frame is a frame structure that is sleeved outside the trachea. On the one hand, the trachea is avoided to realize the rotation of the longitudinal support frame, and on the other hand, the support effect is ensured to increase the stability of the mechanism while making the measuring tool lightweight;

[0030] (2) The connection part and the longitudinal support frame are slidably matched to facilitate the adjustment of the distance between the slide bar and the table top, so that the slide bar avoids the air pipe when the longitudinal slide rail rotates, and is suitable for furnaces with air pipes of different heights.

[0031] (3) The perforations are evenly distributed with the through hole as the center, so that the contact area between the connecting part and the longitudinal support frame is uniform. While realizing longitudinal sliding, it can also ensure the limiting effect of the slide bar in the horizontal direction and improve the installation accuracy of the transverse slide rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the utility model.

[0033] Figure 2 It is a structural schematic diagram of the furnace table of the utility model.

[0034] Figure 3 for Figure 1 Exploded diagram.

[0035] Figure 4 It is a structural schematic diagram of the base of the utility model.

[0036] Figure 5 It is a structural schematic diagram of the longitudinal support frame of the utility model.

[0037] Figure 6 It is a structural schematic diagram of the transverse slide rail of the utility model.

[0038] Figure 7 This is a schematic structural diagram of the transverse slide rail of the utility model (from another perspective).

[0039] Figure 8 It is a schematic diagram of the structure of the measuring component of the utility model.

[0040] Fig. 9 for Figure 8 A partial enlarged view of point A in the middle.

[0041] in:

[0042] 1. Base; 10. Through hole; 11. Bottom plate; 12. Mounting part;

[0043] 2. Horizontal slide rail; 21. Balance member; 22. Connecting part; 2201. Avoidance ring; 2202. Perforation; 23. Slide rod; 24.

[0044] 3. Limiting parts;

[0045] 4. longitudinal support frame; 41. second connecting ring; 42. longitudinal slide rail; 4201, 4202, 43. first connecting ring;

[0046] 5. Measuring assembly; 51. Main ruler; 52. Slideway; 53. Ruler seat; 50. Measuring head;

[0047] 6. Bearing; 7. Furnace table; 70. Air pipe. DETAILED DESCRIPTION

[0048] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0049] Embodiment 1:

[0050] like Figure 1-Figure 3 As shown, in the present embodiment, the flatness measuring tool for the furnace table of silicon steel high temperature annealing furnace has a plurality of air pipes 70 spaced apart on the table top 7, each air pipe 70 being perpendicular to the table top, and the measuring tool comprises a base 1, a longitudinal support frame 4, a transverse slide rail 2 and a measuring assembly 5.

[0051] A base 1, a through hole 10 is provided in the middle of the base 1, the inner diameter of the through hole 10 matches the outer diameter of the air pipe 70, and the bottom surface of the base 1 is a plane matching the table top;

[0052] A longitudinal support frame 4, the longitudinal support frame 4 is rotatably mounted on the base 1;

[0053] A transverse slide rail 2, the transverse slide rail 2 includes a slide bar 23 parallel to the bottom surface of the base 1, and a connecting portion 22 is provided on the slide bar 23, and the connecting portion 22 is connected to the longitudinal support frame 4;

[0054] A measuring assembly 5, wherein the measuring assembly 5 is slidably mounted on a slide bar 23 on one side of the connecting portion 22, and a measuring head 50 of the measuring assembly 5 acts on a measuring point on the table to measure the distance between the measuring point and the slide bar 23;

[0055] The longitudinal support frame 4 rotates relative to the base 1 to drive the measuring component 5 to rotate around the through hole 10 ; the measuring component 5 slides relative to the slide bar 23 to change the distance between the measuring component 5 and the through hole 10 .

[0056] Specifically, the tabletop of the furnace table 7 is used to place the silicon steel coil, and the flatness of the furnace table refers to the flatness of the tabletop; the through hole 10 can be slightly larger than the outer diameter of the air pipe 70; the tabletop is usually circular, one of the multiple air pipes 70 is located at the center of the circle, and the rest are evenly distributed around the center of the circle; the air pipe 70 is used to provide the protective gas required for heat treatment;

[0057] During measurement, the through hole 10 of the base 1 is sleeved on the outside of the air pipe 70, and the base 1 is placed on the table. The base 1 plays a role in supporting and positioning the entire measuring tool. The position of the base 1 remains unchanged as a measurement reference, so that the reference of the measuring component 5 within the current measurement range is consistent;

[0058] The connecting portion 22 is connected to the longitudinal support frame 4 and is used to fix the position of the slide bar 23 on the longitudinal support frame 4 so that the relative distance between the measuring component 5 and the table surface remains unchanged, so as to determine the measuring reference height of the measuring component 5;

[0059] During measurement, the longitudinal support frame 4 drives the measuring assembly 5 to rotate through the transverse slide rail 2, and the measuring assembly 5 slides on the slide bar 23 of the transverse slide rail 2, so that the measuring point covers a circular or fan-shaped area centered on the current air pipe 70. By controlling the rotation angle of the measuring assembly 5 and the moving distance on the slide bar 23, multiple measuring points are arranged, and the distance data of each measuring point is measured in turn, thereby obtaining the flatness of the furnace table;

[0060] In addition, by putting the measuring tool on different air pipes 70, the measuring range of the measuring tool can cover a larger table area, thereby realizing the partitioned measurement of the table.

[0061] In this embodiment, a base 1 matching the table top of the furnace table 7 and the air pipe 70 is provided to position and place the measuring tool, a longitudinal support frame 4 is rotatably installed on the base 1, and a measuring component 5 is slidably installed on the transverse slide rail 2, so that the measuring point is easy to adjust, the reasonable distribution of the measuring points is controllable, and the measuring accuracy is improved. At the same time, the operation is simple and convenient for single-person operation, which saves manpower and improves the measurement efficiency.

[0062] The structure of the measuring tool of this embodiment perfectly matches the design of the furnace table 7, so that the measuring range can cover the entire table surface.

[0063] Embodiment 2:

[0064] Based on the first embodiment, the present embodiment further optimizes the assembly structure of the measuring tool.

[0065] like Figure 1-Figure 4 As shown, the structure of the base 1 is: it includes a bottom plate 11, a tubular structure mounting portion 12 is provided in the middle of the bottom plate 11, the inner hole of the mounting portion 12 is a through hole 10, the through hole 10 passes through the bottom plate 11, the axis of the through hole 10 is perpendicular to the bottom surface of the base 1, and the longitudinal support frame 4 is rotatably mounted on the mounting portion 12.

[0066] The longitudinal support frame 4 can be tubular and can be sleeved on the outside of the trachea 70. In order to make the measuring tool lightweight, Figure 1-Figure 5 The structure of the longitudinal support frame 4 of the present embodiment shown is, including a first connecting ring 43 and a second connecting ring 41 rotatably mounted on the base 1, and also including a plurality of longitudinal slide rails 42 perpendicular to the bottom surface of the base 1, the plurality of longitudinal slide rails 42 are evenly distributed in an array with the through hole 10 as the center, one end of the plurality of longitudinal slide rails 42 is simultaneously fixedly connected to the first connecting ring 43, the other end of the plurality of longitudinal slide rails 42 is simultaneously fixedly connected to the second connecting ring 41, the inner hole of the first connecting ring 43, the inner hole of the second connecting ring 41 and the space between the plurality of longitudinal slide rails 42 form a channel for avoiding the air pipe 70, and the plurality of longitudinal slide rails 42 are simultaneously connected to the connecting portion 22.

[0067] It also includes a bearing 6 , the inner ring of the bearing 6 is concentric with the through hole 10 , and the longitudinal support frame 4 is rotatably mounted on the base 1 through the bearing 6 .

[0068] Specifically, the inner ring of the bearing 6 is sleeved on the mounting portion 12 and fixedly connected to the mounting portion 12, and the outer ring of the bearing 6 is sleeved in the inner hole of the second connecting ring 41 and fixedly connected to the second connecting ring 41; a plurality of longitudinal slide rails 42 are evenly distributed in an array with the through hole 10 as the center, so that the longitudinal support frame 4 is a frame structure sleeved outside the air pipe 70 as a whole, on the one hand, avoiding the air pipe 70 to realize the rotation of the longitudinal support frame 4, and on the other hand, ensuring the support effect, increasing the stability of the mechanism, and making the measuring tool lightweight;

[0069] The longitudinal support frame 4 of the frame structure rotates around the axis of the through hole 10 .

[0070] In order to facilitate the adjustment of the distance between the slide bar 23 and the table, the slide bar 23 is allowed to avoid the air pipe 70 when rotating along the longitudinal slide rail 42, so as to adapt to a variety of furnaces 7 with air pipes 70 of different heights, such as Figure 1 , Figure 3 As shown, the connecting portion 22 is slidably matched with the longitudinal support frame 4, and also includes a limiting member 3. The connecting portion 22 and the longitudinal support frame 4 are simultaneously matched with the limiting member 3 to limit the relative distance between the sliding rod 23 and the table top.

[0071] Furthermore, the position limiting member 3 is a manual clamp, which is detachably fixedly connected to the longitudinal support frame 4, and one end of the manual clamp supports the connecting portion 22, so that the relative distance between the slide bar 23 and the table surface remains unchanged. Specifically, the manual clamp is installed on the longitudinal slide rail 42, and the connecting portion 22 is dragged from the bottom of the connecting portion 22, bearing the entire weight of the transverse slide rail 2, thereby ensuring that the vertical distance between the slide bar 23 and the table surface of the furnace table 7 remains unchanged.

[0072] Further, if Figure 1-Figure 3 , Figure 5 , Figure 6 As shown, the connecting portion 22 includes an escape ring 2201 disposed on the slide bar 23, the inner hole of the escape ring 2201 corresponds to the air pipe 70, and the outer periphery of the escape ring 2201 is provided with a plurality of perforations 2202, the plurality of perforations 2202 are evenly distributed around the through hole 10, and the plurality of perforations 2202 are slidably matched with the longitudinal support frame 4. Specifically, the perforations 2202 are slidably matched with the longitudinal slide rail 42, and the longitudinal slide rail 42 can be as follows Figure 5 The long strip plate shown can also be a rod with a circular cross-section. The perforations 2202 are evenly distributed with the through hole 10 as the center, so that the contact area between the connecting part 22 and the longitudinal support frame 4 is uniform. While realizing longitudinal sliding, it can also ensure the limiting effect of the slide rod 23 in the horizontal direction, thereby improving the installation accuracy of the transverse slide rail 2.

[0073] A first limit block 4202 and a second limit block 4201 are respectively provided at both ends of the longitudinal slide rail 42 to limit the sliding range of the through hole 2202 on the longitudinal slide rail 42 .

[0074] Further, if Figure 1 , Figure 6-Figure 7 As shown, it also includes a balance member 21 disposed on the slide bar 23, and the balance member 21 and the measuring assembly 5 are respectively located on both sides of the connecting portion 22. Specifically, the balance member 21 plays the role of a counterweight to ensure that the slide bar 23 is parallel to the bottom surface of the base 1, thereby reducing the measurement error.

[0075] Embodiment three:

[0076] The measuring component 5 may use a laser rangefinder to improve the measurement accuracy, but the cost is relatively high. Based on the above embodiments, this embodiment further improves the measurement accuracy of the measuring tool at a lower cost.

[0077] like Figure 3 , Figure 8-Figure 9 As shown, the structure of the measuring assembly 5 is as follows: it includes a ruler seat 53 slidably mounted on the slide rod 23, a slide groove 52 is provided on the ruler seat 53, a main ruler 51 is slidably mounted in the slide groove 52, the axis of the main ruler 51 is perpendicular to the bottom surface of the base 1, and one end of the main ruler 51 is a measuring head 50, which is in the shape of a pen tip.

[0078] Specifically, the ruler seat 53 is tubularly sleeved on the slide rod 23. There is a certain friction between the ruler seat 53 and the slide rod 23, so that the ruler seat 53 can be maintained at any position on the slide rod 23. The end of the slide rod 23 is provided with a limit portion 24 to prevent the ruler seat 53 from separating from the slide rod 23; there is also a certain friction between the slide groove 52 and the main ruler 51, so that the main ruler 51 will not slide relative to the main ruler 51 under the action of gravity; the pen-shaped measuring head 50 reduces the contact area with the table surface and improves the measurement accuracy.

[0079] Further, if Fig. 9 As shown, a zero line corresponding to the scale on the main scale 51 is provided on the slide groove 52, and a sub-scale corresponding to the scale on the main scale 51 is provided on one side of the zero line, and the sub-scale is ten degrees, twenty degrees or fifty degrees.

[0080] Specifically, the minimum scale on the main scale 51 is 1 mm, and a sub-scale is provided on the slide groove 52, so that the slide groove 52 has the function of a sub-scale. The measurement accuracy is accurate to more than 0.1 mm through the combination of the scale on the main scale 51 and the scale on the sub-scale; the length of the sub-scale of ten minutes is 9 mm, the length of the sub-scale of twenty minutes is 19 mm, and the length of the sub-scale of fifty minutes is 49 mm.

[0081] like Fig. 9 As shown, the sub-scale on the slide 52 is twenty-tenths, that is, the scale of the sub-scale is 0-20, and the spacing between each small grid is 0.95mm (each small grid differs from the minimum scale of the main scale 51 by 0.05mm). When reading, read the scale below the zero line on the main scale 51, and this value is the integer part of the last reading. Then find the line where the sub-scale is aligned with the scale line of the main scale 51, read the reading corresponding to the alignment line, and multiply this reading by 0.05mm. This reading is the decimal part. Add the integer part and the decimal part above to get the measurement result of a measuring point. Combine different data points on the same plane, find the maximum value, and get the flatness data.

[0082] The specific method of using the flatness measuring tool for the silicon steel high temperature annealing furnace of this embodiment is as follows:

[0083] Step 1: clean the table top of the furnace table 7 to be tested, fix the base 1 to the table top at the position of the air pipe 70 in the center of the furnace table 7, make the air pipe 70 pass through the through hole 10 in the center of the base 1, and pass through the middle part of the longitudinal support frame 4 to avoid the passage of the air pipe 70.

[0084] Step 2: Open the bolts and nuts of the limiter 3 (manual clamp), adjust the transverse slide rail 2 to a suitable height, and then tighten the bolts and nuts.

[0085] Step three, clean the surface of the measuring point, rotate the longitudinal support frame 4, slide the measuring assembly 5 so that the measuring assembly 5 is located above the measuring point, slide the main scale 51 of the measuring assembly 5 downward, and make the measuring head 50 contact the measuring point.

[0086] Step 4: Read the scale below the zero line on the main scale 51, and this value is the integer part of the last reading.

[0087] Step 5, find the line where the secondary scale on the slide 52 is aligned with the scale line of the main scale 51, read the reading corresponding to the alignment line, and multiply this reading by 0.05mm. This reading is the decimal part.

[0088] Step six, add the integer part and the decimal part above to get the measurement result of a measurement point.

[0089] Step 7: Measure the measurement data of multiple measurement points according to the above steps 3 to 6.

[0090] Step eight, integrating the data of each measuring point to obtain the flatness data of the furnace table 7.

[0091] During the above operation, the measurement time of each data can be controlled within 15 seconds, and the measurement accuracy can reach 0.05mm.

[0092] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the protection scope of the utility model.

Claims

1. A tool for measuring the flatness of a silicon steel high temperature annealing furnace, characterized in that: A plurality of air pipes (70) are spaced apart on the tabletop of the furnace table (7), and each air pipe (70) is perpendicular to the tabletop. The measuring tool comprises: A base (1), wherein a through hole (10) is provided in the middle of the base (1), the inner diameter of the through hole (10) matches the outer diameter of the air pipe (70), and the bottom surface of the base (1) is a plane matching the table top; A longitudinal support frame (4), wherein the longitudinal support frame (4) is rotatably mounted on the base (1); A transverse slide rail (2), the transverse slide rail (2) comprising a slide bar (23) parallel to the bottom surface of the base (1), the slide bar (23) being provided with a connecting portion (22), the connecting portion (22) being connected to the longitudinal support frame (4); A measuring component (5), the measuring component (5) being slidably mounted on a slide bar (23) on one side of the connecting portion (22), a measuring head (50) of the measuring component (5) acting on a measuring point on the table surface, and being used to measure the distance between the measuring point and the slide bar (23); The longitudinal support frame (4) rotates relative to the base (1) to drive the measuring component (5) to rotate around the through hole (10); the measuring component (5) slides relative to the sliding rod (23) to change the distance between the measuring component (5) and the through hole (10).

2. The tool for measuring the flatness of a silicon steel high temperature annealing furnace as claimed in claim 1, characterized in that: The structure of the base (1) is: The invention comprises a bottom plate (11), wherein a mounting portion (12) of a tubular structure is arranged in the middle of the bottom plate (11), the inner hole of the mounting portion (12) is a through hole (10), the through hole (10) passes through the bottom plate (11), the axis of the through hole (10) is perpendicular to the bottom surface of the base (1), and the longitudinal support frame (4) is rotatably mounted on the mounting portion (12).

3. The tool for measuring the flatness of a silicon steel high temperature annealing furnace platform as claimed in claim 1, characterized in that: The structure of the longitudinal support frame (4) is as follows: It comprises a first connecting ring (43) and a second connecting ring (41) rotatably mounted on the base (1), and also comprises a plurality of longitudinal slide rails (42) perpendicular to the bottom surface of the base (1), wherein the plurality of longitudinal slide rails (42) are evenly distributed in an array with the through hole (10) as the center, one end of the plurality of longitudinal slide rails (42) is simultaneously fixedly connected to the first connecting ring (43), and the other end of the plurality of longitudinal slide rails (42) is simultaneously fixedly connected to the second connecting ring (41), the inner hole of the first connecting ring (43), the inner hole of the second connecting ring (41) and the space between the plurality of longitudinal slide rails (42) form a passage for avoiding the air pipe (70), and the plurality of longitudinal slide rails (42) are simultaneously connected to the connecting portion (22).

4. The tool for measuring the flatness of a silicon steel high temperature annealing furnace platform as claimed in claim 1, characterized in that: It also includes a bearing (6), the inner ring of the bearing (6) is concentric with the through hole (10), and the longitudinal support frame (4) is rotatably mounted on the base (1) via the bearing (6).

5. The tool for measuring the flatness of a furnace table of a silicon steel high temperature annealing furnace according to claim 1, characterized in that: The connecting portion (22) is slidably matched with the longitudinal support frame (4), and also includes a limiting member (3). The connecting portion (22) and the longitudinal support frame (4) are simultaneously matched with the limiting member (3) to limit the relative distance between the sliding rod (23) and the table top.

6. The tool for measuring the flatness of a silicon steel high temperature annealing furnace platform as claimed in claim 5, characterized in that: The limiting member (3) is a manual clamp, which is detachably fixedly connected to the longitudinal support frame (4), and one end of the manual clamp supports the connecting portion (22) so that the relative distance between the sliding rod (23) and the table surface remains unchanged.

7. The tool for measuring the flatness of a furnace table of a silicon steel high temperature annealing furnace as claimed in claim 5, characterized in that: The connecting portion (22) includes an avoidance ring (2201) arranged on the sliding rod (23), the inner hole of the avoidance ring (2201) corresponds to the air pipe (70), and the outer periphery of the avoidance ring (2201) is provided with a plurality of perforations (2202), and the plurality of perforations (2202) are evenly distributed with the through hole (10) as the center, and the plurality of perforations (2202) are slidably matched with the longitudinal support frame (4).

8. The tool for measuring the flatness of a furnace table of a silicon steel high temperature annealing furnace according to claim 5, characterized in that: It also includes a balancing member (21) arranged on the sliding rod (23), and the balancing member (21) and the measuring component (5) are respectively located on two sides of the connecting portion (22).

9. The tool for measuring the flatness of a silicon steel high temperature annealing furnace platform according to any one of claims 1 to 8, characterized in that: The structure of the measuring component (5) is: The invention comprises a ruler seat (53) slidably mounted on the slide rod (23), the ruler seat (53) being provided with a slide groove (52), a main ruler (51) being slidably mounted in the slide groove (52), the axis of the main ruler (51) being perpendicular to the bottom surface of the base (1), one end of the main ruler (51) being a measuring head (50), and the measuring head (50) being in the shape of a pen tip.

10. The tool for measuring the flatness of a furnace table of a silicon steel high temperature annealing furnace according to claim 9, characterized in that: The slide groove (52) is provided with a zero line corresponding to the scale on the main scale (51), and one side of the zero line is provided with a secondary scale corresponding to the scale on the main scale (51), wherein the secondary scale is tenths, twentyths or fiftyths.

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