A large grinding roller wheel replacement hanger and replacement method

Abstract

The present invention discloses a large grinding roller grinding wheel replacement hanger, which relates to the technical field of hangers, including a grinding wheel hanger, including a U-shaped channel steel, the U-shaped channel steel including an arcuate groove section and a straight groove section fixedly connected to both ends of the arcuate groove section, the two straight groove sections are parallel to each other and are both tangent to the circle where the arcuate groove section is located, the internal through groove of the arcuate groove section is connected to the internal through groove of the straight groove section, forming a clamping groove for accommodating the edge of the grinding wheel, the grinding wheel hanger is symmetrically provided with lifting holes on both sides, and at least three lifting ears are provided on any end face of the grinding wheel hanger, and the lifting ears are evenly distributed on the end face of the grinding wheel hanger. The grinding wheel hanger of the present invention can be well adapted to large grinding roller grinding wheels, making the lifting process safer. In addition, by hooking the lifting hole of the grinding wheel hanger, the grinding wheel hanger can be vertically lifted together with the grinding wheel, and by hooking the lifting ears of the grinding wheel hanger, the grinding wheel hanger can be horizontally lifted together with the grinding wheel, which is convenient for assembling and disassembling the grinding wheel.

Description

Technical Field

[0001] The invention relates to the technical field of slings, in particular to a sling for replacing a large grinding roller and a replacement method. Background Art

[0002] After a period of wear and tear on the working and backup rolls of a thick plate mill, they require surface grinding on a large roll grinder to remove the hardened layer and surface defects. The grinding wheels required for roll grinders are large and heavy. For example, the grinding wheel diameter of a 5000mm mill roll grinder reaches 1066mm, and a single grinding wheel weighs over 400kg. Together with the flange used by the grinding wheel, the total weight is close to 1 ton. Grinding wheels need to be replaced after a period of wear and tear. Safe handling of large grinding wheels during lifting and installation is a pressing issue.

[0003] The commonly used method at present is that multiple workers use slings and wire ropes to cooperate with cranes to lift and install. Due to the large size and weight of large grinding wheels, the workers have high labor intensity and low work efficiency, and there are safety hazards such as injuries and collisions. In addition, the hard contact between the grinding wheel and the crowbar, the ground, etc. during transportation and installation will also cause damage to the grinding wheel. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a large grinding roller and grinding wheel replacement hanger and a replacement method.

[0005] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0006] A large grinding roller wheel replacement hanger includes a grinding wheel hanger and a U-shaped channel steel. The U-shaped channel steel includes an arcuate groove section and straight groove sections fixedly connected to both ends of the arcuate groove section. The two straight groove sections are parallel to each other and are tangent to the circle where the arcuate groove section is located.

[0007] The inner through groove of the arc-shaped groove section is connected to the inner through groove of the straight groove section to form a clamping groove for accommodating the edge of the grinding wheel.

[0008] Hanging holes are symmetrically opened on both sides of the grinding wheel hanger, and at least three hanging ears are arranged on any end surface of the grinding wheel hanger. The hanging ears are evenly distributed on the end surface of the grinding wheel hanger.

[0009] As a preferred solution of the large grinding roller wheel replacement hanger described in the present invention, the arc of the arc-shaped groove segment is a semicircular arc, the spacing between the two straight groove segments is equal to the inner diameter of the arc-shaped groove segment, and the inner diameter of the arc-shaped groove segment is larger than the diameter of the assembly hole in the middle of the grinding wheel.

[0010] As a preferred solution of the large grinding roller wheel replacement hanger described in the present invention, the widths of the internal through grooves of the arc groove section and the straight groove section are equal, and the widths of the internal through grooves of the arc groove section and the straight groove section are greater than the width of the grinding wheel, and the difference between the two is 5 mm.

[0011] As a preferred solution of the large grinding roller and grinding wheel replacement hanger of the present invention, the height of the grinding wheel hanger is smaller than the outer diameter of the grinding wheel, and the difference between the height and the outer diameter is 50 mm.

[0012] As a preferred solution of the large grinding roller and grinding wheel replacement hanger of the present invention, the width of the grinding wheel hanger is greater than the outer diameter of the grinding wheel, and the difference between the width and the outer diameter is 5 mm.

[0013] As a preferred solution of the large grinding roller grinding wheel replacement hanger of the present invention, it further includes a fixing auxiliary tooling for vertically fixing the grinding wheel hanger, the fixing auxiliary tooling includes a base plate and two fixed slot arms fixedly arranged on the base plate, and the fixed slot arms are provided with internal through slots for accommodating the edges of the grinding wheel hanger.

[0014] The two fixing slot arms are symmetrically arranged on the bottom plate, and the inner through slots of the two fixing slot arms are aligned.

[0015] As a preferred solution of the large grinding roller and grinding wheel replacement hanger of the present invention, the height of the fixed slot arm is smaller than the height of the grinding wheel hanger, and the difference between the two is 5 mm.

[0016] As a preferred solution of the large grinding roller and grinding wheel replacement hanger of the present invention, the distance between the opposite sides of the two fixed groove arms is greater than the width of the grinding wheel hanger, and the difference between the two is 5 mm.

[0017] As a preferred solution of the large grinding roller and grinding wheel replacement hanger of the present invention, positioning bolt holes are provided on the bottom plate.

[0018] The present invention also discloses a method for replacing a large grinding roller grinding wheel, comprising the following steps:

[0019] S1: Use the lifting equipment to lift the grinding wheel to be replaced out of the roll grinder, place it flat on the ground, and loosen the locking nut on the flange in the middle of the grinding wheel;

[0020] S2: Hook the chain slings to the lifting ears on the end face of the grinding wheel sling, and use the lifting equipment to lift the grinding wheel sling horizontally and drive the grinding wheel sling to move so that the grinding wheel enters the grinding wheel sling horizontally;

[0021] S3: Lift the grinding wheel hoist to detach the flange in the middle of the grinding wheel, and then place the grinding wheel hoist together with the grinding wheel horizontally on the ground;

[0022] S4: Remove the chain sling connected to the end face of the grinding wheel sling, and hook the hooks to the lifting holes on both sides of the grinding wheel sling. Use the lifting equipment to vertically lift the grinding wheel sling together with the grinding wheel and move them, and then place them vertically in the fixed auxiliary tooling;

[0023] S5: The grinding wheel that needs to be replaced is lifted out of the grinding wheel sling by a sling and transported to the waste grinding wheel storage area. The new grinding wheel is then lifted out and transported back to the grinding wheel sling;

[0024] S6: Hook the lifting hook of the lifting device into the lifting holes on both sides of the grinding wheel lifting device, lift the grinding wheel lifting device together with the new grinding wheel using the lifting equipment, and then place it horizontally on the ground;

[0025] S7: Remove the slings connected to both sides of the grinding wheel sling, hook the hooks to the lifting ears on the end face of the grinding wheel sling, lift the grinding wheel sling together with the new grinding wheel by the lifting equipment, and align the assembly hole in the middle of the new grinding wheel with the flange on the ground. Then lower the grinding wheel sling so that the flange enters the assembly hole of the grinding wheel.

[0026] S8: Remove the hooks connected to the lifting ears, hook the hooks into the lifting holes on both sides of the grinding wheel hanger, then lift and move the grinding wheel hanger, and then place it vertically in the fixed auxiliary tooling;

[0027] S9: Use a sling to lift the assembled new grinding wheel, separate it from the grinding wheel sling, and transport it to the installation location of the roll grinder to complete the installation of the new grinding wheel.

[0028] The beneficial effects of the present invention are:

[0029] (1) The grinding wheel hanger of the present invention can be well adapted to large grinding roller grinding wheels, so that the grinding wheel can be stably placed in the grinding wheel hanger, making the lifting process safer, eliminating the safety hazards of being hit or collided by manual handling, and avoiding damage to the grinding wheel during disassembly and movement. In addition, the grinding wheel hanger can be vertically lifted together with the grinding wheel by hooking the lifting hole of the grinding wheel hanger, and can be horizontally lifted together with the grinding wheel by hooking the lifting ear of the grinding wheel hanger, which facilitates the assembly and disassembly of the grinding wheel and improves the efficiency of replacing the grinding wheel.

[0030] (2) The present invention coordinates the fixed auxiliary tooling with the grinding wheel hanger, so that the grinding wheel hanger can be fixedly placed in the fixed auxiliary tooling in a vertical direction, thereby facilitating the replacement and transportation of the grinding wheel.

[0031] (3) The grinding wheel hanger and the fixing auxiliary tooling in the present invention are simple in structure, easy to manufacture, and have lower cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 This is a schematic structural diagram of the grinding wheel hanger in the large grinding roller grinding wheel replacement hanger provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the fixed auxiliary tooling in the large grinding roller and grinding wheel replacement hanger provided by the present invention;

[0035] Among them: 1. Grinding wheel hanger; 2. Arc groove section; 3. Straight groove section; 4. Lifting hole; 5. Lifting ear; 6. Fixed auxiliary tooling; 7. Bottom plate; 8. Fixed groove arm; 9. Positioning bolt hole. DETAILED DESCRIPTION

[0036] In order to make the contents of the present invention more clearly understood, the present invention is further described below in detail based on specific implementation methods in conjunction with the accompanying drawings.

[0037] This embodiment provides a large grinding roller wheel replacement hanger, comprising a grinding wheel hanger 1 and a fixing auxiliary fixture 6. The grinding wheel hanger 1 allows the grinding wheel to be lifted vertically or horizontally, facilitating installation and removal of the flange in the middle of the grinding wheel. The fixing auxiliary fixture 6 secures the grinding wheel hanger 1 in a vertical position, facilitating removal of discarded grinding wheels from the grinding wheel hanger 1 and installation of new grinding wheels into the grinding wheel hanger 1 for subsequent installation.

[0038] Specifically, the grinding wheel hanger 1 includes a U-shaped channel steel, which includes an integrally formed arcuate channel section 2 and two straight channel sections 3. The arc of the arcuate channel section 2 is a semicircular arc, and one end of the two straight channel sections 3 is connected to the two ends of the arcuate channel section 2 respectively. The two straight channel sections 3 are parallel to each other and are tangent to the circle of the arcuate channel section 2.

[0039] Both the straight groove section 3 and the arcuate groove section 2 have internal through-grooves, and the inner and outer widths of the straight groove section 3 and the arcuate groove section 2 are equal, so that the outer end surface of the straight groove section 3 and the outer end surface of the arcuate groove section 2 lie in the same plane, and the inner end surface of the straight groove section 3 and the inner end surface of the arcuate groove section 2 also lie in the same plane. The arcuate groove section 2 communicates with the internal through-grooves in the straight groove section 3, forming a retaining groove for accommodating the edge of the grinding wheel.

[0040] It should be noted that the inner width D2 of the straight groove sections 3 and the arcuate groove sections 2 is greater than the thickness of the grinding wheel, and the width L of the grinding wheel hanger 1, that is, the distance between the two sides of the straight groove sections 3 that are separated from each other, is greater than the outer diameter of the grinding wheel, allowing the grinding wheel to be placed within the grinding wheel hanger 1. At the same time, to prevent the grinding wheel from shaking within the grinding wheel hanger 1 due to a large difference between the grinding wheel thickness and the inner width D2 of the groove section of the grinding wheel hanger 1, and a large difference between the width L of the grinding wheel hanger 1 and the outer diameter of the grinding wheel, in this embodiment, the inner width D2 of the groove section of the grinding wheel hanger 1 is set to 5 mm larger than the grinding wheel thickness, and the width L of the grinding wheel hanger 1 is set to 5 mm larger than the grinding wheel diameter. This makes the grinding wheel more stable after being placed in the grinding wheel hanger 1, and almost prevents shaking.

[0041] The inner diameter of the arc-shaped groove section 2 in the grinding wheel hanger 1 is larger than the diameter of the assembly hole in the middle of the grinding wheel, which facilitates the installation and removal of the flange in the middle of the grinding wheel.

[0042] The height H of the grinding wheel hanger 1, i.e., the distance between the lowest end of the arc-shaped groove section 2 and the upper end of the straight groove section 3, is less than the outer diameter of the grinding wheel, and the difference between the two is 50 mm. This height difference is to facilitate the cantilever crane to lift the grinding wheel out of the grinding wheel hanger 1.

[0043] In addition, hanging holes 4 are symmetrically provided on the left and right sides of the grinding wheel hanger 1. These two hanging holes 4 are respectively provided on the sides of the two straight groove sections 3 that are away from each other, and the two hanging holes 4 are aligned. The hoisting equipment can lift the grinding wheel hanger 1 by hooking the hooks to the two hanging holes 4, and ensure that the grinding wheel hanger 1 always remains vertically placed in the air. Three lifting ears 5 are provided on the front face of the grinding wheel hanger 1. These three lifting ears 5 are respectively provided in the middle of the front face of the arc-shaped groove section 2 and near the upper end of the two straight groove sections 3. The three lifting ears 5 are respectively located at the three vertices of the equilateral triangle. By hooking a chain lock with one ring and three hooks to the three lifting ears 5 respectively, the hanger can lift the grinding wheel hanger 1 and keep the grinding wheel hanger 1 horizontally placed in the air.

[0044] The fixed auxiliary tooling 6 includes a base plate 7 and two fixed slot arms 8 fixedly welded to the upper end surface of the base plate 7. Both fixed slot arms 8 are channel steels with internal through-slots formed therein. The width d of the internal through-slots is greater than the thickness of the grinding wheel hanger 1. The two fixed slot arms 8 are symmetrically and relatively arranged on the base plate 7, so that the internal through-slots of the two fixed slot arms 8 are aligned. The spacing between the opposing sides of the two fixed slot arms 8 is greater than the width of the grinding wheel hanger 1, so that the grinding wheel hanger 1 can be placed in the slot between the two fixed slot arms 8, so that the grinding wheel hanger 1 remains in an upright position. At the same time, to prevent the grinding wheel hanger 1 from shaking inside the fixed auxiliary tooling 6, the width l of the fixed auxiliary tooling 6, that is, the spacing between the opposing sides of the two fixed slot arms 8, is set to 5 mm greater than the grinding wheel width L in this embodiment.

[0045] The height h of the fixed auxiliary tooling 6 , that is, the height of the two fixed slot arms 8 , is set to be 5 mm smaller than the height H of the grinding wheel hanger 1 .

[0046] In addition, positioning bolt holes 9 are provided at the four corners of the bottom plate 7 , and the bottom plate 7 can be fixed to the ground by anchor bolts.

[0047] The following is an example of a large-scale grinding wheel in a steel mill. The wheel's outer diameter before use was 1066mm, the assembly hole in the middle of the wheel had a diameter of 508mm, and the wheel was 152mm thick. The wheel was replaced when it was worn to an outer diameter of 745mm.

[0048] Figure 1 It is a grinding wheel hanger 1, including an integrally formed arc-shaped groove section 2 and a straight groove section 3. The inner width D2 of the groove section is 157 mm, the height H of the grinding wheel hanger 1 is 1016 mm, the width of the grinding wheel hanger 1 is 1071 mm, and the inner diameter of the arc-shaped groove section 2 of the grinding wheel hanger 1 is 510 mm, which is larger than the diameter of the grinding wheel assembly hole. Figure 2 The fixing auxiliary tooling 6 includes a base plate 7 and two fixing slot arms 8 fixedly welded to the base plate 7. The height h of the fixing slot arms 8 is 1011 mm, and the width l of the fixing auxiliary tooling 6 is 1076 mm.

[0049] This embodiment also provides a method for replacing a large grinding roller grinding wheel, comprising the following steps:

[0050] S1: Use the lifting equipment to lift the grinding wheel to be replaced out of the roll grinder, place it flat on the ground, and loosen the locking nut on the flange in the middle of the grinding wheel;

[0051] S2: Hook the chain slings onto the lifting ears 5 on the end face of the grinding wheel sling 1, and use the lifting equipment to lift the grinding wheel sling 1 horizontally and drive the grinding wheel sling 1 to move so that the grinding wheel enters the grinding wheel sling 1 horizontally;

[0052] S3: Lift the grinding wheel hanger 1 to detach the flange in the middle of the grinding wheel, and then place the grinding wheel hanger 1 together with the grinding wheel horizontally on the ground;

[0053] S4: Remove the chain sling connected to the end face of the grinding wheel sling 1, and hook the hooks to the lifting holes 4 on both sides of the grinding wheel sling 1, use the lifting equipment to vertically lift and move the grinding wheel sling 1 together with the grinding wheel, and then vertically place it in the fixed auxiliary tooling 6;

[0054] S5: The grinding wheel to be replaced is lifted out of the grinding wheel sling 1 by a sling and transported to the waste grinding wheel storage area, and then the new grinding wheel is lifted out and transported back to the grinding wheel sling 1;

[0055] S6: Hook the lifting hook of the lifting device into the lifting holes 4 on both sides of the grinding wheel lifting device 1, lift the grinding wheel lifting device 1 together with the new grinding wheel by the lifting equipment, and then place it horizontally on the ground;

[0056] S7: Remove the slings connected to both sides of the grinding wheel sling 1, hook the hooks to the lifting ears 5 on the end surface of the grinding wheel sling 1, lift the grinding wheel sling 1 together with the new grinding wheel by the lifting equipment, and align the assembly hole in the middle of the new grinding wheel with the flange on the ground, then lower the grinding wheel sling 1 so that the flange enters the assembly hole of the grinding wheel;

[0057] S8: Remove the hooks connected to the lifting ears 5, hook the hooks into the lifting holes 4 on both sides of the grinding wheel hanger 1, then lift and move the grinding wheel hanger 1, and then vertically place it in the fixed auxiliary tooling 6;

[0058] S9: Use a sling to lift the assembled new grinding wheel, separate it from the grinding wheel sling 1, and transport it to the installation location of the roll grinder to complete the installation of the new grinding wheel.

[0059] By adopting the above-mentioned grinding roller wheel replacement lifting device and corresponding replacement precautions, the replacement efficiency of the grinding wheel is effectively improved, the lifting process is safer, the safety hazards of being hit or collided due to manual handling are eliminated, and damage to the grinding wheel during disassembly, assembly and movement is avoided.

[0060] In addition to the above embodiments, the present invention may also have other implementation methods; any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A method for replacing a large grinding roller grinding wheel, which is based on a large grinding roller grinding wheel replacement hanger, and is characterized by: The large grinding roller and grinding wheel replacement hanger includes: A grinding wheel hanger (1) comprises a U-shaped channel steel, wherein the U-shaped channel steel comprises an arcuate slot section (2) and straight slot sections (3) fixedly connected to both ends of the arcuate slot section (2), wherein the two straight slot sections (3) are parallel to each other and are both tangent to the circle on which the arcuate slot section (2) is located. The internal through groove of the arc-shaped groove section (2) is connected to the internal through groove of the straight groove section (3), forming a clamping groove for accommodating the edge of the grinding wheel. Hanging holes (4) are symmetrically provided on both sides of the grinding wheel hanger (1), and at least three hanging ears (5) are provided on any end face of the grinding wheel hanger (1), and the hanging ears (5) are evenly distributed on the end face of the grinding wheel hanger (1); It also includes a fixing auxiliary tool (6) for vertically fixing the grinding wheel hanger (1), the fixing auxiliary tool (6) including a base plate (7) and two fixing slot arms (8) fixedly arranged on the base plate (7), and an internal through slot for accommodating the edge of the grinding wheel hanger (1) is provided in the fixing slot arms (8); The method for replacing the large grinding roller grinding wheel comprises the following steps: S1: Use the lifting equipment to lift the grinding wheel to be replaced out of the roll grinder, place it flat on the ground, and loosen the locking nut on the flange in the middle of the grinding wheel; S2: hooking the chain slings onto the lifting ears (5) on the end faces of the grinding wheel sling (1), and using the lifting equipment to lift the grinding wheel sling (1) horizontally, and then driving the grinding wheel sling (1) to move, so that the grinding wheel enters the grinding wheel sling (1) horizontally; S3: Lift the grinding wheel sling (1) to detach the flange in the middle of the grinding wheel, and then place the grinding wheel sling (1) together with the grinding wheel horizontally on the ground; S4: Remove the chain sling connected to the end face of the grinding wheel sling (1), and hook the sling hook to the sling holes (4) on both sides of the grinding wheel sling (1), use the slinging equipment to vertically lift and move the grinding wheel sling (1) together with the grinding wheel, and then vertically place it in the fixed auxiliary tooling (6); S5: lifting the grinding wheel to be replaced from the grinding wheel sling (1) by a sling and transporting it to a waste grinding wheel storage area, then lifting the new grinding wheel to be replaced and transporting it to the grinding wheel sling (1); S6: hook the lifting hook of the lifting device into the lifting holes (4) on both sides of the grinding wheel lifting device (1), lift the grinding wheel lifting device (1) together with the new grinding wheel by the lifting equipment, and then place it horizontally on the ground; S7: Remove the slings connected to both sides of the grinding wheel sling (1), hook the hooks to the lifting ears (5) on the end surface of the grinding wheel sling (1), lift the grinding wheel sling (1) together with the new grinding wheel by the lifting equipment, and align the assembly hole in the middle of the new grinding wheel with the flange on the ground, then lower the grinding wheel sling (1) so that the flange enters the assembly hole of the grinding wheel; S8: Remove the hooks connected to the lifting ears (5), hook the hooks into the lifting holes (4) on both sides of the grinding wheel hanger (1), then lift and move the grinding wheel hanger (1), and then vertically place it in the fixed auxiliary tooling (6); S9: Use a sling to lift the assembled new grinding wheel, separate it from the grinding wheel sling (1), and transport it to the installation location of the roll grinder to complete the installation of the new grinding wheel.

2. The method for replacing a large grinding roller according to claim 1, wherein: The arc of the arc-shaped groove section (2) is a semicircular arc, the distance between the two straight groove sections (3) is equal to the inner diameter of the arc-shaped groove section (2), and the inner diameter of the arc-shaped groove section (2) is larger than the diameter of the assembly hole in the middle of the grinding wheel.

3. The method for replacing a large grinding roller according to claim 1, wherein: The widths of the internal through grooves of the arc-shaped groove section (2) and the straight groove section (3) are equal, and the widths of the internal through grooves of the arc-shaped groove section (2) and the straight groove section (3) are greater than the width of the grinding wheel, and the difference between the two is 5 mm.

4. The method for replacing a large grinding roller according to claim 1, wherein: The height of the grinding wheel hanger (1) is smaller than the outer diameter of the grinding wheel, and the difference between the two is 50 mm.

5. The method for replacing a large grinding roller according to claim 1, wherein: The width of the grinding wheel hanger (1) is greater than the outer diameter of the grinding wheel, and the difference between the width and the outer diameter is 5 mm.

6. The method for replacing a large grinding roller according to any one of claims 1 to 5, characterized in that: The two fixed slot arms (8) are symmetrically arranged on the bottom plate (7), and the internal through slots of the two fixed slot arms (8) are aligned.

7. The method for replacing a large grinding roller according to claim 6, wherein: The height of the fixed slot arm (8) is smaller than the height of the grinding wheel hanger (1), and the difference between the two is 5 mm.

8. The method for replacing a large grinding roller according to claim 6, wherein: The distance between the two opposite sides of the fixed slot arms (8) is greater than the width of the grinding wheel hanger (1), and the difference between the two is 5 mm.

9. The method for replacing a large grinding roller according to claim 6, wherein: Positioning bolt holes (9) are provided on the bottom plate (7).

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