Mill lining plate based on high-toughness high-wear-resistance medium-low carbon CrNiMo alloy steel

Abstract

The mill lining plate comprises a lining plate body, the lining plate body is of an arc-shaped structure, a first side wall and a second side wall are arranged at the two ends of the lining plate body in the circumferential direction, at least two screw holes are formed in the first side wall, bolts are arranged in the screw holes, a T-shaped sliding groove is formed in the second side wall, and the T-shaped sliding groove is communicated with the first side wall and the second side wall. The screw head of the bolt is matched with the T-shaped sliding groove in shape. The bolts and the T-shaped sliding grooves are formed in the two sides of the lining plates correspondingly, the screwing-in depth of the bolts on one lining plate is adjusted before installation, then the bolts are inserted into the T-shaped sliding grooves of the adjacent lining plates to form limiting, and in the process, the reserved gap between the two lining plates is accurately adjusted through the screwing-in depth of the bolts; therefore, a deformation gap is provided for thermal expansion in the working process of the mill, and the lining plate can be prevented from being deformed and damaged due to thermal expansion.

Description

TECHNICAL FIELD

[0001] The utility model relates to mill parts, concretely relates to mill lining plate based on high toughness high wear resistance medium low carbon CrNiMo alloy steel. BACKGROUND

[0002] The mill is the key equipment that material is broken and is ground, is suitable for a variety of ore and other grindability material dry or wet type grinding, it passes through the steel ball in the cylinder as grinding medium, and the material is hit and grinds, makes it reach the fineness required.

[0003] The patent with the application number CN201710935211.8 discloses a kind of lining plate for ball mill, including lining plate main body, wear block and arch plate, the upper end of lining plate main body is equipped with clamping groove, lower end is equipped with limiting slot;Wear block is made of isosceles trapezoidal part and straight plate part, isosceles trapezoidal part is narrow on top and wide on bottom, and lower wide end is located on straight plate part, straight plate part is matched with clamping groove, and weight-reducing hole is formed in isosceles trapezoidal part;Two ends of arch plate are equipped with end plate, and the gap between middle part and lining plate main body is used as heat insulation layer.

[0004] Because heating occurs in the use process of mill, and the above-mentioned patent does not reserve deformation gap when lining plate is installed, and the reserved deformation gap cannot be changed according to deformation amount, so that deformation of lining plate may occur after heating in the use process. UTILITY MODEL CONTENTS

[0005] Based on the deficiency of using static pressure to compensate molten iron for the first and second riser structure in the prior art, the utility model provides a mill lining plate based on high toughness high wear resistance medium low carbon CrNiMo alloy steel.

[0006] The technical scheme adopted by the utility model to solve the above technical problems is:

[0007] The mill lining plate based on high toughness high wear resistance medium low carbon CrNiMo alloy steel includes lining plate body, the lining plate body is circular arc structure and has first side wall and second side wall at its circumferential two ends, at least two screw holes are provided at first side wall, and bolts are arranged in the screw holes, T-shaped sliding groove is provided at second side wall, and the shape of bolt head is consistent with that of T-shaped sliding groove. Since the lining plates inside the mill are made of multiple circular arc structures, a gap needs to be reserved between adjacent two lining plates, the bolt inserted into the T-shaped sliding groove of adjacent lining plate is formed to limit in the process of adjusting the depth of bolt screwed into one of the lining plates and setting bolts and T-shaped sliding grooves at two sides of the lining plate before installation, and the reserved gap between the two lining plates is accurately adjusted by the depth of bolt screwed in, so that deformation gap is provided for thermal expansion in the working process of the mill, and deformation and damage of the lining plate due to thermal expansion can be prevented.

[0008] As preferred, two mounting holes are arranged on the liner body, and the mounting bolt passes through the mounting hole and the cylinder of the mill and is locked by a nut. The arrangement of the mounting hole enables the liner to be firmly fixed on the cylinder of the mill, the two mounting holes disperse the stress, avoid stress concentration, and improve the service life of the liner.

[0009] As preferred, the mounting hole comprises a first hole section on the outer side and a second hole section on the inner side, the first hole section is cylindrical, and the second hole section is quadrangular frustum. The cylindrical first hole section facilitates the installation of the bolt, and the quadrangular frustum-shaped second hole section closely cooperates with the head of the bolt, effectively prevents the bolt from loosening in operation, and ensures the reliability of the connection.

[0010] As preferred, the four side walls of the second hole section are in the form of circular arcs. The circular arc-shaped side walls can reduce stress concentration, improve the fatigue resistance of the liner, closely fit the head of the bolt to the hole section, and enhance the connection strength.

[0011] As preferred, the head of the mounting bolt is matched with the shape of the second hole section. The precise cooperation of the head of the bolt with the shape of the hole section ensures the accuracy and stability of the installation, avoids the damage of the liner due to the loosening of the bolt, and prolongs the service life of the liner.

[0012] As preferred, the outer side wall of the liner body is provided with an abutting portion abutting against the inner side wall of the cylinder of the mill. The abutting portion closely fits the liner with the inner wall of the cylinder of the mill, reduces the gap therebetween, reduces noise, improves the supporting effect of the liner, and enhances the stability of the operation of the mill.

[0013] As preferred, a groove is arranged at the abutting portion, and a filler is arranged in the groove. The filler in the groove can absorb vibration and impact, further reduce noise, and the buffering effect of the filler can reduce the wear between the liner and the cylinder of the mill, prolong the service life of the two.

[0014] As preferred, the inner side wall of the liner body is provided with a curved surface with concave-convex alternation. The concave-convex alternation of the curved surface can increase the surface area of the liner, improve the wear resistance, and better grind and mix the materials during the operation of the mill, and improve the working efficiency of the mill.

[0015] As preferred, the liner body is made of high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel. The high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel has good toughness and wear resistance, can withstand high load impact and wear during the operation of the mill, prolongs the service life of the liner, reduces the replacement frequency, and reduces the maintenance cost.

[0016] Compared with the prior art, the application has the advantages that: the bolts and T-shaped sliding grooves are arranged on the two sides of the lining plate respectively, the depth of the bolt screwed into one of the lining plates is adjusted before installation, then the bolt is inserted into the T-shaped sliding groove of the adjacent lining plate to form a limit, the reserved gap between the two lining plates is accurately adjusted by the depth of the bolt screwed in, so that a deformation gap is provided for thermal expansion in the working process of the mill, and the deformation and damage of the lining plate due to thermal expansion can be prevented. BRIEF DESCRIPTION OF DRAWINGS

[0017] The application will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be regarded as limiting the scope of the application. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can include exaggerated display, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 is a perspective view of the application;

[0019] Figure 2 is a perspective view of the application;

[0020] Figure 3 is a side view of the lining plate after installation (use state diagram);

[0021] Figure 4 is a perspective view of the lining plate after installation (use state diagram);

[0022] In the drawings: 10, lining plate body; 101, first side wall; 1011, threaded hole; 102, second side wall; 1021, T-shaped sliding groove; 103, mounting hole; 1031, first hole section; 1032, second hole section; 104, fitting part; 1041, groove; 01, cylinder; 02, mounting bolt; 03, nut; 04, bolt. DETAILED DESCRIPTION

[0023] The preferred embodiments of the application will be described in detail below with reference to the drawings. Those skilled in the art will appreciate that these descriptions are only descriptive, exemplary and should not be interpreted as limiting the scope of protection of the application.

[0024] Embodiment:

[0025] The lining plate of the mill is based on high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel, such as Figures 1-4As shown, the lining plate body 10 is in a circular arc structure and has a first side wall 101 and a second side wall 102 at the circumferential two ends, at least two screw holes 1011 are arranged at the first side wall 101, and a bolt 04 is arranged in the screw hole 1011; a T-shaped sliding groove 1021 is arranged at the second side wall 102, and the shape of the head of the bolt 04 is consistent with the shape of the T-shaped sliding groove 1021. Since the lining plate inside the mill is composed of multiple circular arc structures, a gap needs to be reserved between adjacent two lining plates. According to the scheme, the bolt 04 and the T-shaped sliding groove 1021 are arranged at the two sides of the lining plate respectively, the depth of the bolt 04 screwed into one of the lining plates is adjusted before installation, and then the bolt 04 is inserted into the T-shaped sliding groove 1021 of the adjacent lining plate to form a limit. In this process, the reserved gap between the two lining plates is accurately adjusted by the depth of the bolt 04 screwed in, so that a deformation gap is provided for thermal expansion during the working process of the mill, and deformation and damage of the lining plate due to thermal expansion can be prevented.

[0026] As preferred, two mounting holes 103 are arranged on the lining plate body 10, and a mounting bolt 02 passes through the mounting hole 103 and the cylinder 01 of the mill and is locked by a nut 03. The arrangement of the mounting hole 103 enables the lining plate to be firmly fixed on the mill cylinder 01, the two mounting holes 103 are dispersedly stressed, stress concentration is avoided, and the service life of the lining plate is improved.

[0027] As preferred, the mounting hole 103 includes a first hole section 1031 at the outer side and a second hole section 1032 at the inner side, the first hole section 1031 is in a cylindrical shape, and the second hole section 1032 is in a quadrangular frustum shape. The first hole section 1031 in the cylindrical shape facilitates the installation of the bolt 02, and the second hole section 1032 in the quadrangular frustum shape is closely matched with the head of the bolt, which can effectively prevent the bolt from loosening during work and ensure the reliability of the connection.

[0028] As preferred, the four side walls of the second hole section 1032 are in a circular arc structure. The circular arc side walls can reduce stress concentration, improve the fatigue resistance of the lining plate, closely match the head of the bolt with the hole section, and enhance the connection strength.

[0029] As preferred, the head of the mounting bolt 02 is consistent with the shape of the second hole section 1032. The accurate matching of the shape of the head of the bolt with the hole section ensures the accuracy and stability of the installation, avoids damage of the lining plate due to loosening of the bolt, and prolongs the service life of the lining plate.

[0030] As preferred, the outer side wall of the lining plate body 10 is provided with an abutting portion 104 abutting against the inner side wall of the mill cylinder 01. The abutting portion 104 closely matches the lining plate with the inner wall of the mill cylinder 01, reduces the gap therebetween, reduces noise, improves the supporting effect of the lining plate, and enhances the stability of the mill operation.

[0031] As preferred, the abutting part 104 is provided with a groove 1041, and the groove 1041 is filled with a filler. The filler in the groove 1041 can absorb vibration and impact, further reducing noise, and the buffer effect of the filler can reduce the wear between the lining plate and the mill cylinder 01, prolonging the service life of both.

[0032] As preferred, the inner side wall of the lining plate body 10 is provided with a concave-convex alternating curved surface. The concave-convex alternating curved surface design can increase the surface area of the lining plate, improve its wear resistance, and at the same time, can better grind and mix the materials during the operation of the mill, improving the working efficiency of the mill.

[0033] As preferred, the lining plate body is made of high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel. The high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel has good toughness and wear resistance, can withstand high load impact and wear during the operation of the mill, prolong the service life of the lining plate, reduce the replacement frequency, and reduce the maintenance cost.

[0034] The above describes the mill lining plate based on high-toughness and high-wear-resistance medium-low-carbon CrNiMo alloy steel provided by the present application. The principles and implementation modes of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the present application and the core idea. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in many ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel, comprising a liner body, characterized in that, The liner body has an arc-shaped structure and has a first sidewall and a second sidewall at both ends of its circumference. The first sidewall has at least two screw holes and bolts are installed in the screw holes. The second sidewall has a T-shaped groove, and the bolt head matches the shape of the T-shaped groove.

2. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 1, characterized in that, The liner body has two mounting holes. The mounting bolts pass through the mounting holes and the mill cylinder and are locked in place by nuts.

3. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 2, characterized in that, The mounting hole includes a first hole section on the outside and a second hole section on the inside. The first hole section is cylindrical and the second hole section is frustum-shaped.

4. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 3, characterized in that, The four sidewalls of the second hole section have an arc-shaped structure.

5. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 4, characterized in that, The screw head of the mounting bolt matches the shape of the second hole section.

6. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 1, characterized in that, The outer wall of the liner body is provided with a contact part that abuts against the inner wall of the mill cylinder.

7. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 6, characterized in that, The mating part has a groove, and the groove is filled with a filler.

8. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 1, characterized in that, The inner wall of the lining plate has alternating concave and convex curved surfaces.

9. The mill liner based on high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel according to claim 1, characterized in that, The liner body is made of high-toughness, high-wear-resistant medium-low carbon CrNiMo alloy steel.

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