阅读说明：本技术 一种球磨机的滑履磨损修复方法 (Method for repairing wear of sliding shoe of ball mill ) 是由 潘光庆 李庆文 张长安 吴埌 于 2019-11-20 设计创作，主要内容包括：一种球磨机的滑履磨损修复方法,属于球磨机维修技术领域。包括设置在球磨机磨筒端部的滑履(8),在磨筒的内壁以及其端部的腹板(3)的内壁上分别通过衬板固定螺栓(2)固定有衬板,其特征在于：包括如下步骤：步骤a,打磨滑履(8)；步骤b,修补滑履(8)的厚度缺陷；步骤c,对滑履(8)进行防渗处理；步骤d,结构胶补强；步骤e,安装加强板(4)；步骤f,安装新的衬板。通过本申请的球磨机的滑履磨损修复方法,克服了传统采用热熔焊接技术修复滑履时所存在的花费巨大且工期长的缺陷,大大降低了因修补而造成的球磨机无法正常而造成的经济损失。(A method for repairing the abrasion of a sliding shoe of a ball mill belongs to the technical field of ball mill maintenance. Including setting up slipper (8) at ball mill tube end portion, be fixed with the welt through welt fixing bolt (2) respectively on the inner wall of mill tube and web (3) of tip, its characterized in that: the method comprises the following steps: step a, polishing a sliding shoe (8); b, repairing the thickness defect of the slipper (8); c, performing anti-seepage treatment on the sliding shoe (8); d, reinforcing the structural adhesive; step e, mounting a reinforcing plate (4); and f, installing a new lining plate. The method for repairing the wear of the sliding shoe of the ball mill overcomes the defects of huge cost and long construction period existing when the sliding shoe is repaired by adopting a hot-melt welding technology in the prior art, and greatly reduces the economic loss caused by the incapability of normal ball mill due to repair.)

1. The utility model provides a crawler shoe abrasion repair method of ball mill, includes and sets up crawler shoe (8) at ball mill tube end portion, is fixed with the welt through welt fixing bolt (2) respectively on the inner wall of mill tube and web (3) of tip, its characterized in that: the method comprises the following steps:

step a, taking down the lining plate, cleaning the inner surface and the outer surface of the sliding shoe (8) to be repaired, and removing the edges, burrs and corrosion defects of the inner surface and the outer surface of the sliding shoe (8);

b, checking the thickness of the sliding shoe (8), finding out the position of the sliding shoe (8) with the thickness smaller than the preset thickness, and performing thickness repair on the position with the thickness defect, so as to repair the position with the thickness defect to be larger than or equal to the preset thickness;

c, performing anti-seepage treatment on the position subjected to thickness restoration on the surface of the sliding shoe (8);

d, after the position with the thickness defect on the inner wall of the sliding shoe (8) is subjected to thickness repair, the thickness repair position is reinforced by structural adhesive again;

e, fixing the reinforcing plate (4) with the inner surface of the sliding shoe (8) and the inner surface of the web plate (3) through the reinforcing plate fixing bolt (5);

and f, arranging an accommodating groove for accommodating the reinforcing plate (4) on the outer side of the lining plate, fixing the lining plate through the lining plate fixing bolt (2) again, and correspondingly enabling the reinforcing plate (4) to enter the corresponding accommodating groove after the lining plate is fixed again.

2. The method for repairing wear of a shoe of a ball mill according to claim 1, characterized in that: the reinforcing plate (4) comprises two mutually perpendicular plate surfaces, and the two mutually perpendicular plate surfaces of the reinforcing plate (4) are respectively attached to the inner surface of the sliding shoe (8) and the inner surface of the web plate (3) and then fixed through reinforcing plate fixing bolts (5).

3. The method for repairing wear of a shoe of a ball mill according to claim 1, characterized in that: the reinforcing plate (4) is made of a high-strength steel plate with the thickness of 20-30 mm.

4. The method for repairing wear of a shoe of a ball mill according to claim 1, characterized in that: in the step e, at least 24 reinforcing plates (4) are fixed side by side along the inner circumference of the grinding cylinder.

5. The method for repairing wear of a shoe of a ball mill according to claim 1, characterized in that: in step b, the predetermined thickness is 30 mm.

6. The method for repairing wear of a shoe of a ball mill according to claim 1, characterized in that: in the step b, the cold welding technology is adopted to carry out thickness repair on the position with the thickness defect.

Technical Field

A method for repairing the abrasion of a sliding shoe of a ball mill belongs to the technical field of ball mill maintenance.

Background

The ball mill is the core equipment of the whole cement grinding system, and is related to the running efficiency of the whole powder system. The ball mill is composed of a horizontal cylinder, a feeding and discharging hollow shaft, a grinding head and the like, wherein the cylinder is a long grinding cylinder, a grinding body is arranged in the grinding cylinder, the cylinder of the grinding cylinder is made of a steel plate, and a lining plate is generally fixed on the inner wall of the grinding cylinder in order to improve the wear resistance of the grinding cylinder.

During the operation of the ball mill, the lining plate in the grinding cylinder has high wear-resisting property, but can also cause abrasion. Once the lining plate is worn, the grinding body contacts the inner wall of the shoe and wears the shoe as a gap occurs due to the wear of the lining plate. Once the abrasion of the sliding shoe is not found and maintained in time, the sliding shoe is designed to be slightly worn, oil leakage and material leakage accidents occur to affect the production, and a great production safety accident is caused by the breakage of a mill cylinder.

In the prior art, a repair method of wear of a sliding shoe of a ball mill generally adopts a factory return off-line repair method, and when the ball mill is returned to the factory for repair, a hot-melt welding technology is firstly used for completely welding and repairing a wear point, and then a lathe is used for machining a grinding cylinder so as to ensure the running precision of the grinding cylinder. Because the volume and the weight of the grinding cylinder are large, the traditional off-line repair mode is difficult to disassemble and assemble, inconvenient to transport, huge in cost and long in construction period, and the thermal deformation and the thermal stress concentration caused by the hot-melting welding are difficult to control and eliminate, so that certain potential safety hazards exist.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art, can realize the online repair of the slide shoe, and overcomes the defects of huge cost and long construction period in the traditional off-line repair of the slide shoe when the slide shoe is returned to a factory.

The technical scheme adopted by the invention for solving the technical problems is as follows: the method for repairing the abrasion of the sliding shoe of the ball mill comprises the steps of arranging the sliding shoe at the end part of a grinding cylinder of the ball mill, and fixing lining plates on the inner wall of the grinding cylinder and the inner wall of a web plate at the end part of the grinding cylinder through lining plate fixing bolts respectively, and is characterized in that: the method comprises the following steps:

step a, taking down the lining plate, cleaning the inner surface and the outer surface of the sliding shoe to be repaired, and removing the corners, burrs and corrosion defects of the inner surface and the outer surface of the sliding shoe;

b, checking the thickness of the sliding shoe, finding out the position of the sliding shoe, which is smaller than the preset thickness, and performing thickness repair on the position with the thickness defect, so as to repair the position with the thickness defect to be larger than or equal to the preset thickness;

c, performing anti-seepage treatment on the position subjected to thickness restoration on the surface of the sliding shoe;

d, after the position with the thickness defect on the inner wall of the sliding shoe is subjected to thickness repair, reinforcing the position subjected to thickness repair by using structural adhesive again;

e, fixing the reinforcing plate with the inner surface of the sliding shoe and the inner surface of the web plate respectively through reinforcing plate fixing bolts;

and f, arranging a containing groove for containing the reinforcing plate on the outer side of the lining plate, fixing the lining plate through the lining plate fixing bolt again, and enabling the reinforcing plate to correspondingly enter the corresponding containing groove after the lining plate is fixed.

Preferably, the reinforcing plate comprises two mutually perpendicular plate surfaces, and the two mutually perpendicular plate surfaces of the reinforcing plate are respectively attached to the inner surface of the slipper and the inner surface of the web plate and then fixed through a reinforcing plate fixing bolt.

Preferably, the reinforcing plate is made of a high-strength steel plate with the thickness of 20-30 mm.

Preferably, in said step e, at least 24 reinforcing plates are fixed side by side along the inner circumference of the grinding cylinder.

Preferably, in step b, the predetermined thickness is 30 mm.

Preferably, in the step b, a cold welding technique is used to perform thickness repair on the position with the thickness defect.

Compared with the prior art, the invention has the beneficial effects that:

1. through the slipper abrasion repairing method of the ball mill, the defects that the cost is huge and the construction period is long when the slipper is repaired by adopting a hot-melt welding technology in the prior art are overcome, the repairing cost is lower than 1/3 of the traditional repairing scheme, compared with the traditional welding repairing scheme, the whole construction period is reduced by 1/3, and the economic loss caused by the fact that the ball mill cannot be normal due to repairing is greatly reduced.

2. When the thickness is repaired, the cold welding technology is adopted, so that the defects that the thermal deformation and the thermal stress concentration are difficult to control and eliminate when the hot welding repair is adopted in the prior art are overcome.

3. The structural adhesive is used for reinforcing the mounting position of the reinforcing plate fixing bolt, and the structural adhesive has certain effects of reducing vibration and noise, so that noise pollution during operation of the mill can be effectively reduced.

4. The wear grooves of the inner walls of the sliding shoe and the web are filled with the metal wear-resistant glue, so that the requirements on the strength, the sealing and the running precision of the ball mill are met, and the original use state is basically achieved.

Drawings

FIG. 1 is a flow chart of a method for repairing wear of a slipper of a ball mill.

FIG. 2 is a schematic view of a method for repairing wear of a slipper of a ball mill.

Wherein: 1. the grinding machine comprises an end lining plate 2, a lining plate fixing bolt 3, a web plate 4, a reinforcing plate 5, a reinforcing plate fixing bolt 6, glue injection points 7, welding points 8, a sliding shoe 9, a grinding cylinder wall 10 and a grinding cylinder lining plate.

Detailed Description

FIGS. 1-2 illustrate preferred embodiments of the present invention, and the present invention will be further described with reference to FIGS. 1-2.

As shown in fig. 2, a sliding shoe 8 is arranged at the end of a cylinder wall 9 of a grinding cylinder, a lining plate 10 of the grinding cylinder is fixed on the inner wall of the cylinder wall 9 of the grinding cylinder through a lining plate fixing bolt 2, and an end lining plate 1 is fixed on the inner wall of a web 3 at the end of the grinding cylinder through a lining plate fixing bolt 2, as shown in fig. 1, the method for repairing the wear of the sliding shoe of the ball mill comprises the following steps:

step 1001, disassembling a grinding cylinder lining plate 10 and an end part lining plate 1 and grinding a sliding shoe 8;

dismantling a grinding cylinder lining plate 10 and an end part lining plate 1 in a grinding cylinder, cleaning the inner surface and the outer surface of the sliding shoe 8 to be repaired, and removing the defects of corners, burrs, corrosion and the like of the inner surface and the outer surface of the sliding shoe 8.

Step 1002, repairing the thickness defect of the slipper 8;

and (3) checking the thickness of the sliding shoe 8, finding out the position of the sliding shoe 8 with the thickness less than 30mm, and performing thickness repair on the position of the sliding shoe 8 with the thickness less than 30mm by using a cold welding technology, wherein the sliding shoe 8 with the thickness defect is repaired by at least 30mm, which is shown as a welding point 7 in figure 2. Due to the adoption of the cold welding technology, the defects that the thermal deformation and the thermal stress concentration are difficult to control and eliminate when the hot welding repair is adopted in the prior art are overcome.

Step 1003, performing anti-seepage treatment on the slide shoe 8;

and (3) performing anti-seepage treatment on the position (welding point 7) subjected to the over-thickness repair on the surface of the sliding shoe 8 by using a vacuum infiltration technology to ensure that the surface of the repaired position does not leak.

Step 1004, filling and reinforcing the thickness defect position of the sliding shoe 8;

after the position of the inner wall of the slipper 8 with the thickness defect is repaired by a cold welding technology, structural glue is used for reinforcing the outside of the corresponding welding point 7, see the glue injection point 6 in fig. 2, so that the height of the glue injection point 6 is parallel and level with the inner surface of the slipper 8, and the structural glue has the effect of reducing vibration and noise, and the noise pollution during the operation of a mill can be effectively reduced.

Step 1005, manufacturing and mounting the reinforcing plate 4;

the reinforcing plate 4 is made of a high-strength steel plate with the thickness of 20-30 mm, and the reinforcing plate 4 comprises two mutually perpendicular plate surfaces, and the cross section of the reinforcing plate is L-shaped.

When the reinforcing plate 4 is attached, two mutually perpendicular plate surfaces thereof are respectively attached to the inner surface of the shoe 8 and the inner surface of the web 3, and the two mutually perpendicular plate surfaces of the reinforcing plate 4 are respectively fixed to the inner surface of the shoe 8 and the inner surface of the web 3 by the reinforcing plate fixing bolt 5. And the width of the reinforcing plates 4 is set according to the inner perimeter of the grinding cylinder wall 9, so that at least 24 reinforcing plates 4 are arranged side by side along the inner circumference of the grinding cylinder.

Step 1006, manufacturing and installing a new grinding cylinder lining plate 10 with a containing groove and an end part lining plate 1;

preparing the grinding cylinder liner plate 10 and the end part liner plate 1 again, arranging accommodating grooves corresponding to the fixing positions of the reinforcing plates 4 on the outer surfaces of the grinding cylinder liner plate 10 and the end part liner plate 1, fixing the grinding cylinder liner plate 10 and the end part liner plate 1 through the liner plate fixing bolts 2, and after the liner plate fixing bolts 2 are fixed, correspondingly enabling the fixed reinforcing plates 4 to enter the corresponding accommodating grooves.

After the slipper 8 is repaired by the slipper abrasion repairing method of the ball mill, the repairing cost is lower than 1/3 of the traditional repairing scheme, compared with the traditional welding repairing scheme, the whole construction period is reduced by 1/3, and the economic loss caused by the fact that the ball mill cannot be normal due to repairing is greatly reduced.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.