A method for detecting the precision of on-line surfacing repair of a roller shell of a roller mill

Abstract

The present application relates to a kind of vertical mill grinding roller sleeve online surfacing repair precision detection method, belong to grinding roller surfacing detection technical field.Step one: before detection, check whether first scale, second scale and third scale are intact;Step two: clean the adhesive of grinding roller sleeve surface;Step three: first scale is measured from the big end of grinding roller and is recorded;Step four: second scale is measured from the small end of grinding roller and is recorded;Step five: third scale is measured from the big end of grinding roller sleeve surfacing protective layer and is recorded;Step six: the distance between grinding roller sleeve working cone surface and first scale, the distance between grinding roller sleeve working cone surface and second scale are all ≤10mm, and the distance between the outer diameter of grinding roller sleeve big end surfacing protective layer and third scale reaches the design size of grinding roller sleeve.The present application improves the measurement grinding roller sleeve online repair precision, reduces the size gap between original size after repair, ensures the precision of grinding roller sleeve online surfacing.

Description

Technical Field

[0001] This invention relates to a method for detecting the accuracy of online weld overlay repair of grinding roller sleeves in vertical mills, belonging to the field of grinding roller weld overlay detection technology. Background Technology

[0002] A vertical roller mill is a high-efficiency device for grinding blast furnace slag into slag powder. The slag powder, after being ground to a suitable level, can replace a portion of the cement clinker, significantly reducing production costs and improving the overall performance of cement. However, after a certain period of grinding operation, the grinding rollers and sleeves of the vertical roller mill experience severe wear, leading to decreased grinding efficiency, reduced production capacity, and increased energy consumption. Consequently, the grinding rollers require online welding repair.

[0003] Vertical mill grinding rollers are large in size, and repair is generally carried out by online welding. After welding, the dimensions of the repaired roller sleeve must be measured to ensure that the dimensions of the repaired roller are within the same range as the original dimensions. Currently, existing measurement methods and tools only measure the large end of the grinding roller, which is highly subjective and lacks accuracy. This results in large dimensional errors in the grinding roller, often causing excessive vibration, unstable operation, and passive production reduction after production starts. Therefore, a convenient and highly accurate online welding repair method for vertical mill roller sleeves is urgently needed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for online welding repair accuracy detection of grinding roller sleeves of vertical mills, which is convenient to operate, has high detection accuracy, and ensures stable operation of equipment.

[0005] The technical solution adopted by this invention to solve the above problems is as follows: a method for detecting the accuracy of online welding repair of grinding roller sleeves in vertical mills, wherein the detection method is based on a first scale, a second scale, and a third scale, and the detection method includes the following steps:

[0006] Step 1: Before testing, check whether the first, second, and third scales are intact;

[0007] Step 2: Clean the adhesive residue from the surface of the grinding roller sleeve to ensure that the surface of the grinding roller sleeve is clean and tidy;

[0008] Step 3: Measure and record the results using the first scale from the large end of the grinding roller;

[0009] Step 4: Measure and record the results using the second scale from the small end of the grinding roller;

[0010] Step 5: Measure and record the weld overlay protective layer at the large end of the self-grinding roller sleeve using the third scale.

[0011] Step Six: The distance between the working cone surface of the grinding roller sleeve and the first scale, and the distance between the working cone surface of the grinding roller sleeve and the second scale are both ≤10mm, and the distance between the outer diameter of the overlay protective layer at the large end of the grinding roller sleeve and the third scale meets the design dimensions of the grinding roller sleeve. The three scales are mutually verified to ensure the dimensional accuracy of the grinding roller sleeve after online repair.

[0012] The first scale includes a first short side and a first long side. The first short side is vertically arranged at one end of the first long side, and the two are arranged perpendicularly. A first locking block is provided on the top of the inner side of the first short side. An annular groove is opened on the large end face of the grinding roller sleeve. The first locking block is hooked into the annular groove, so that the first short side is in close contact with the large end face of the roller sleeve, thereby measuring the distance between the working cone surface of the grinding roller sleeve and the first long side.

[0013] The second scale includes a second short side and a second long side. The second short side is inclined at one end of the second long side. The second short side is attached to the end face of the small end of the grinding roller and the top of the second short side abuts against the outer diameter of the small end clamping part of the grinding roller, thereby measuring the distance between the working cone surface of the grinding roller sleeve and the second long side.

[0014] The angle between the second short side and the second long side is the designed angle between the small end face of the grinding roller and the working cone surface of the grinding roller sleeve.

[0015] The third ruler is a straight ruler, which is placed against the working cone surface of the grinding roller sleeve to measure the distance between the outer diameter of the weld overlay protective layer at the large end of the grinding roller sleeve and the third ruler.

[0016] The measuring ruler is placed close to the large end face of the grinding roller.

[0017] The length of the first long side and the length of the second long side are the length of the grinding roller.

[0018] The first and second long sides are respectively provided with scale lines.

[0019] Compared with existing technologies, the advantages of this invention are as follows: A method for detecting the accuracy of online welding repair of grinding roller sleeves in vertical mills involves cross-checking the weld protection layer at three locations: the large end of the grinding roller, the small end of the grinding roller, and the large end of the grinding roller sleeve. This verifies whether the dimensions after online repair meet the original design dimensions. This application improves the accuracy of measuring online repair of grinding roller sleeves, reduces the difference between the repaired and original dimensions, ensures the accuracy of online welding of grinding roller sleeves, achieves stable equipment operation, increases production capacity, and reduces energy consumption. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a grinding roller for a vertical mill according to an embodiment of the present invention;

[0021] Figure 2 for Figure 1A schematic diagram of the measurement taken at the large end of the self-grinding roller at point A using the first scale;

[0022] Figure 3 This is a schematic diagram of the first scale.

[0023] Figure 4 for Figure 1 A schematic diagram of the measurement taken at the small end of the self-grinding roller at point A using the second scale;

[0024] Figure 5 This is a schematic diagram of the second scale.

[0025] Figure 6 This is a schematic diagram showing the distance between the outer diameter of the weld overlay protective layer at the large end of the grinding roller and the third scale, measured using a measuring ruler.

[0026] In the figure, 1 is the first scale, 1.1 is the first short side, 1.2 is the first long side, 1.3 is the first clamping block, 2 is the second scale, 2.1 is the second short side, 2.2 is the second long side, 3 is the grinding roller, 3.1 is the annular groove, 3.2 is the weld overlay protective layer, 4 is the clamping part, and 5 is the scale line. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] This embodiment presents a method for detecting the accuracy of online welding repair of vertical mill grinding roller sleeves. The detection method is based on a first scale 1, a second scale 2, and a third scale. For example... Figure 3 As shown, the first scale 1 includes a first short side 1.1 and a first long side 1.2. The first short side 1.1 is vertically positioned at one end of the first long side 1.2, and the two are arranged perpendicularly. The angle between the first short side 1.1 and the first long side 1.2 is 90°. A first locking block 1.3 is provided at the top of the inner side of the first short side 1.1. Figure 1 , 2 As shown, an annular groove 3.1 is opened on the end face of the large end of the grinding roller 3. The first locking block 1.3 is hooked into the annular groove 3.1, so that the first short side 1.1 is in close contact with the end face of the large end of the grinding roller 3. Observe whether the generatrix of the working cone surface of the grinding roller sleeve is parallel to the first long side 1.2. Measure the distance between the working cone surface of the grinding roller sleeve and the first long side 1.2 by measuring ruler.

[0029] like Figure 5 As shown, the second scale 2 includes a second short side 2.1 and a second long side 2.2. The second short side 2.1 is inclined at one end of the second long side 2.2, and the included angle between them is 105°. The size of the included angle is the designed included angle between the small end face of the grinding roller and the working cone surface of the grinding roller sleeve. Figure 4 As shown, the second short side 2.1 is attached to the end face of the small end of the grinding roller, and the top of the second short side 2.1 abuts against the outer diameter of the clamping part 4 at the small end of the grinding roller. The distance between the working cone surface of the grinding roller sleeve and the second long side 2.2 is measured by measuring ruler.

[0030] The third ruler is a straight ruler. The third ruler is attached to the working cone surface of the grinding roller sleeve, and the measuring ruler is close to the large end of the grinding roller. The distance between the 3.2 outer diameter of the overlay protective layer at the large end of the grinding roller sleeve and the third ruler is measured through the measuring ruler.

[0031] The length of the first long side and the length of the second long side are the length of the grinding roller, and scale lines 5 are respectively provided on the first long side 1.2 and the second long side 2.2.

[0032] A method for detecting the accuracy of online weld overlay repair of vertical mill grinding roller sleeves includes the following steps:

[0033] Step 1: Before testing, check whether the first, second, and third scales are intact and ensure that there is no damage such as bending or wear on the scale.

[0034] Step 2: Clean the adhesive residue from the surface of the grinding roller sleeve to ensure that the surface of the grinding roller sleeve is clean and tidy.

[0035] Step 3: The first protrusion of the first scale is hooked into the annular groove, so that the first short side is in close contact with the large end face of the grinding roller. Then observe whether the generatrix of the working cone surface of the grinding roller sleeve is parallel to the first long side of the first scale. According to the length of the grinding roller, select 10 points evenly, measure the distance between the working cone surface of the grinding roller sleeve and the first long side with a measuring ruler and record it.

[0036] Step 4: With the second short side of the second ruler pressed tightly against the small end face of the grinding roller and the top of the second short side abutting against the outer diameter of the small end clamping part of the grinding roller, observe the fit between the second long side and the working cone surface of the grinding roller sleeve. Based on the length of the grinding roller, select 10 evenly spaced points, measure the distance between the working cone surface of the grinding roller sleeve and the second long side with a measuring ruler, and record the results.

[0037] Step 5: As Figure 6 As shown, the third scale is attached to the working cone surface of the grinding roller sleeve, and the measuring ruler is close to the large end of the grinding roller. The measuring ruler is used to measure the distance between the outer diameter of the weld protection layer of the large end of the grinding roller sleeve and the third scale. During the measurement, it is necessary to ensure that the measuring ruler is close to the end face of the large end of the grinding roller.

[0038] Step Six: The straight-line distance between the working cone surface of the grinding roller sleeve and the first long side is ≤10mm, and the straight-line distance between the working cone surface of the grinding roller sleeve and the second long side is ≤10mm. In addition, the straight-line distance from the outer diameter of the overlay protective layer at the large end of the grinding roller sleeve to the third scale meets the design size of the grinding roller sleeve. The three scales verify the test dimensions, ensuring the dimensional accuracy of the grinding roller sleeve after online repair.

[0039] This method, applied to the online welding repair of grinding roller sleeves, reduces vibration in the vertical mill, maintaining stable production. After welding and initial material feeding, a 12-hour break-in period is required before rapid pressurization and feeding, increasing specific surface area and hourly output. Taking a slag vertical mill with an annual output of 1 million tons as an example, assuming the same specific surface area for slag powder, and calculating 690 hours of initial production during the grinding roller welding phase, it can increase the hourly output of slag powder by 8 tons / hour and reduce power consumption by 2 kWh / ton of powder. With 5 welding operations per year, this translates to an increase in annual output of 27,600 tons and a reduction in annual power consumption of 55,200 kWh, with an estimated annual benefit of 1.4186 million yuan.

[0040] This application involves cross-checking the weld overlay protective layer at three points: the large end of the grinding roller, the small end of the grinding roller, and the large end of the grinding roller sleeve, to verify whether the dimensions after online repair meet the original design dimensions. This application improves the accuracy of measuring the online repair of the grinding roller sleeve, reduces the difference between the repaired and original dimensions, ensures the accuracy of online weld overlay on the grinding roller sleeve, achieves stable equipment operation, increases production capacity, and reduces energy consumption.

[0041] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.

Claims

1. A method for detecting the accuracy of online weld overlay repair of vertical mill grinding roller sleeves, characterized in that: The detection method is based on a first scale, a second scale, and a third scale, and includes the following steps: Step 1: Before testing, check whether the first, second, and third scales are intact; Step 2: Clean the adhesive residue from the surface of the grinding roller sleeve to ensure that the surface of the grinding roller sleeve is clean and tidy; Step 3: Measure and record the results using the first scale from the large end of the grinding roller; Step 4: Measure and record the results using the second scale from the small end of the grinding roller; Step 5: Measure and record the weld overlay protective layer at the large end of the self-grinding roller sleeve using the third scale. Step 6: The distance between the working cone surface of the grinding roller sleeve and the first scale, and the distance between the working cone surface of the grinding roller sleeve and the second scale are both ≤10mm, and the distance between the outer diameter of the overlay protective layer at the large end of the grinding roller sleeve and the third scale reaches the design size of the grinding roller sleeve. The three scales are mutually verified to ensure the dimensional accuracy of the grinding roller sleeve after online repair. The first scale includes a first short side and a first long side. The first short side is vertically arranged at one end of the first long side, and the two are arranged perpendicularly. A first locking block is provided on the top of the inner side of the first short side. An annular groove is opened on the large end face of the grinding roller sleeve. The first locking block is hooked into the annular groove so that the first short side is in close contact with the large end face of the roller sleeve, thereby measuring the distance between the working cone surface of the grinding roller sleeve and the first long side. The second scale includes a second short side and a second long side. The second short side is inclined at one end of the second long side. The second short side is attached to the end face of the small end of the grinding roller and the top of the second short side abuts against the outer diameter of the small end clamping part of the grinding roller, thereby measuring the distance between the working cone surface of the grinding roller sleeve and the second long side. The third ruler is a straight ruler, which is placed against the working cone surface of the grinding roller sleeve. The measuring ruler measures the distance between the outer diameter of the overlay protective layer at the large end of the grinding roller sleeve and the third ruler.

2. The method for detecting the accuracy of online welding repair of vertical mill grinding roller sleeves according to claim 1, characterized in that: The angle between the second short side and the second long side is the designed angle between the small end face of the grinding roller and the working cone surface of the grinding roller sleeve.

3. The method for detecting the accuracy of online welding repair of vertical mill grinding roller sleeves according to claim 1, characterized in that: The measuring ruler is placed close to the large end face of the grinding roller.

4. The method for detecting the accuracy of online welding repair of vertical mill grinding roller sleeves according to claim 1, characterized in that: The length of the first long side and the length of the second long side are the length of the grinding roller.

5. The method for detecting the accuracy of online welding repair of vertical mill grinding roller sleeves according to claim 1, characterized in that: The first and second long sides are respectively provided with scale lines.

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