Novel combined vertical mill roller sleeve

Abstract

The utility model discloses a novel combined type vertical mill roller sleeve which comprises a roller body base body, an outer roller sleeve sub-block and a compression ring sub-block, the outer roller sleeve sub-blocks comprise outer roller sleeve sub-blocks A and outer roller sleeve sub-blocks B; a second wear-resistant layer is arranged on the outer surface of the outer roller sleeve block A; the outer roller sleeve block B comprises an outer roller sleeve base body, a plurality of first grooves and second grooves which are arranged at intervals are formed in the outer surface of the outer roller sleeve base body, first wear-resistant prefabricated bodies are embedded in the first grooves, and second wear-resistant prefabricated bodies are embedded in the second grooves. According to the utility model, different types of outer roller sleeve blocks can be selected according to on-site material grinding requirements, and all replacement or partial replacement can be selected according to the surface abrasion degree of the outer roller sleeve blocks, so that the working efficiency of roller sleeve replacement is improved, the labor intensity is reduced, and the operation reliability and safety are improved; the combined and detachable design is adopted, so that the roller body base body, the outer roller sleeve blocks and the pressing ring blocks can be independently manufactured, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill roller sleeves, in particular to a novel combined vertical mill roller sleeve. Background Art

[0002] During the operation of the vertical mill, the outer surface of its roller sleeve is in contact with the material and the grinding disc for a long time, and is squeezed and impacted by the grinding disc and the material. The grinding medium between the grinding roller and the grinding disc has a high hardness, and the grinding surface is easily worn. As the wear intensifies, the effective grinding area gradually decreases, causing the grinding efficiency of the vertical mill to continue to decline, and the power consumption increases accordingly. Due to the uneven wear of the grinding surface, there will even be impact and collision between the grinding roller and the liner. In severe cases, it will cause cracks or even breakage of the grinding roller and the liner, causing damage to the machine. Therefore, this requires that the surface of the roller sleeve has high strength and wear resistance.

[0003] The wear problem of roller sleeves of vertical mills has always been a problem that all kinds of vertical mills have. Generally, the surfacing cycle of roller sleeve wear-resistant layer is about 2000 hours. Severe wear of the wear-resistant layer will affect production quality and production efficiency. The existing measures are only to replace the roller as a whole or perform surfacing repair, and the maintenance cycle of the enterprise is often only a few days. If the roller is replaced as a whole, it requires the enterprise to store the roller sleeve as a spare part, and the on-site disassembly and assembly is difficult, and the professional and technical ability of the operator is high. In addition, the replaced old roller sleeve also needs surfacing repair, which will consume a lot of manpower and material resources, seriously affecting the production and overall benefits of the enterprise. If the roller sleeve surface surfacing repair is adopted, the existing measures, whether "offline surfacing" or "online surfacing", not only have high maintenance costs, but also cannot be completed during the maintenance period, which seriously affects the startup time of the enterprise and brings serious losses to the production of the enterprise. For the mill that has been shut down, timely resumption of operation can play its greatest value.

[0004] During on-site use, insufficient or drastic changes in air volume, insufficient or excessive feed volume, increased pressure difference in the mill, drastic changes in the speed of the powder selector, and drastic changes in system temperature will cause the mill vibration to intensify. The intensified mill vibration will increase the impact force of the grinding roller on the grinding disc, and the hard substances in the slag will intensify the chiseling wear of the wear-resistant layer of the grinding roller and the grinding disc, so that grooves will be formed in the wear-resistant layer of the grinding roller and the grinding disc, which will cause different degrees of wear in various areas of the outer surface of the roller sleeve, and the roller sleeve and the grinding disc retaining ring area, that is, the "R area" of the arc section of the large end flange of the roller sleeve, is often the most severely worn.

[0005] According to this characteristic, a new type of combined vertical mill roller sleeve is designed, which adopts the combined structure of "welding roller body + welding outer roller sleeve block", which can realize rapid assembly and disassembly. The outer roller sleeve is assembled on the roller body in a block structure. The roller body base is usually welded on the surface of the wear-resistant layer, and the outer roller sleeve contains the flange arc section "R zone" with the most serious wear. The current practice is only to weld the wear-resistant layer. The difference is that the thickness of the wear-resistant layer of the two is different. It is only by increasing the thickness of the wear-resistant layer of the outer roller sleeve to improve its wear resistance, which has great limitations.

[0006] Experiments have shown that although the number of overall replacements of the vertical mill roller sleeve can be reduced to a certain extent by optimizing the zoning design of the roller sleeve wear-resistant layer, the roller sleeve wear resistance has not been substantially improved because its wear resistance is mainly limited by the hardness of the cladding wire material. The problem of severe wear in the "R zone" of the arc segment of the large-end flange of the roller sleeve still exists. Instead, the frequency of replacement of the segmented outer roller sleeve is increased, the spare parts inventory of the outer roller sleeve cladding blocks is increased, and the maintenance cost is increased.

[0007] To sum up, how to further optimize the grinding roller structure, improve the strength and wear resistance of the outer roller sleeve blocks, select outer roller sleeve blocks of different types and wear resistance according to the on-site material grinding requirements, and make them able to be quickly disassembled and replaced, improve work efficiency, reduce labor intensity, and improve operational reliability and safety are the key issues to be solved in this utility model. Summary of the invention

[0008] The technical problem to be solved by the utility model is to provide a new type of combined vertical mill roller sleeve in view of the deficiencies of the above-mentioned prior art. The outer roller sleeves in the utility model adopt a block design, and different types of outer roller sleeve blocks can be selected according to the on-site material grinding requirements, that is, A outer roller sleeve block or B outer roller sleeve block can be selected, and full or partial replacement can be selected according to the degree of surface wear of the outer roller sleeve block, thereby improving the work efficiency of replacing the roller sleeve, reducing labor intensity, and improving operational reliability and safety. The combined and detachable design between the roller body base, the outer roller sleeve block and the pressure ring block enables the roller body base, the outer roller sleeve block and the pressure ring block to be prepared separately, thereby improving manufacturing efficiency.

[0009] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0010] A novel combined vertical mill roller sleeve comprises a roller body base, an outer roller sleeve block and a pressure ring block; the outer surface of the rear section of the roller body base has a wear-resistant structure, a plurality of outer roller sleeve blocks are respectively located on the outer surface of the front section of the roller body base and a plurality of outer roller sleeve blocks are spliced ​​to form a circular outer roller sleeve, a plurality of pressure ring blocks are wedge-shaped spliced ​​with the circular outer roller sleeve and the pressure ring block is connected to the roller body base through fasteners; the outer roller sleeve block comprises an A outer roller sleeve block and a B outer roller sleeve block; the outer surface of the A outer roller sleeve block is provided with a second wear-resistant layer; the B outer roller sleeve block comprises an outer roller sleeve base, a plurality of first grooves arranged at intervals are provided on the front section of the outer surface of the outer roller sleeve base, a plurality of second grooves arranged at intervals are provided on the rear section of the outer surface of the outer roller sleeve base, a first wear-resistant preform is embedded in the first groove, and a second wear-resistant preform is embedded in the second groove.

[0011] The above-mentioned new combined vertical mill roller sleeve belongs to a new combined cladding & metal-ceramic composite roller sleeve structure, which adopts two combination forms of "cladding roller body + cladding outer roller sleeve block" or "cladding roller body + metal-ceramic composite outer roller sleeve block". This scheme can achieve rapid assembly and disassembly. Among them, the roller body has a low degree of wear, and the roller body base is usually made of cast steel. The outer surface uses high-chromium alloy flux-cored wire to pass through the first wear-resistant layer through open arc cladding, and the hardness can reach 55-58HRC. The outer roller sleeve adopts a block structure including the most severely worn flange arc section "R zone". Different types of outer roller sleeve blocks can be selected according to the on-site material grinding requirements, that is, cladding outer roller sleeve blocks or metal-ceramic composite outer roller sleeve blocks.

[0012] A The outer roller sleeve block is usually made of cast steel and is cast in blocks. The outer surface is welded with a second wear-resistant layer by open arc welding with high chromium alloy flux-cored wire. The hardness can reach 55-58HRC. Due to the high degree of wear in this area, the wear-resistant layer partition can be optimized and the thickness of the second wear-resistant layer can be increased during design. B The outer roller sleeve block adopts the combination of "outer layer adhesive inlaid metal ceramic preform + high chromium cast iron matrix". The block casting method is used. The "lost foam" casting process is used to composite cast the two into one piece. Mass production is achieved through the "one box multiple molds" method. The outer roller sleeve matrix is ​​made of high chromium cast iron. The hardness can reach 58-61HRC after heat treatment, and the metal ceramic composite preform is formed by vacuum sintering, and the hardness can reach 68-71HRC.

[0013] The principle of the combined grinding roller structure is to separate the front and rear ends of the original existing grinding roller flange arc segment "R zone" as part of the outer roller sleeve block, and the contact surface between it and the roller body base adopts a wedge-shaped structure design. The rear section of the roller body base retains the original design and is tightly installed on the roller core with tolerance matching. The roller body base and the roller core are assembled in the vertical mill. When repairing, the roller body base does not need to be disassembled unless necessary. It is only necessary to disassemble and replace the outer roller sleeve block to quickly resume production, thereby improving the work efficiency of replacing the roller sleeve.

[0014] The outer roller sleeves are all designed in blocks, so that the weight of the outer roller sleeve blocks can be controlled and the labor intensity is reduced. The contact surfaces of the roller body base, the outer roller sleeve blocks and the pressure ring blocks are all wedge-shaped structures. Semi-U-shaped notches are set at both ends of the outer roller sleeve blocks to match the cylindrical pins on the outer surface of the roller body base to prevent the outer roller sleeve blocks from moving in the circumferential direction of the roller body base. The bottom of the outer roller sleeve block and the bottom plane of the middle step of the roller body base are matched and positioned with a V-shaped groove structure, and multiple outer roller sleeve blocks are spliced ​​together to form a circular outer roller sleeve. Multiple pressure ring blocks are wedge-shaped spliced ​​with the circular outer roller sleeve, and the pressure ring block and the roller body base are limited by positioning pins and locked by fasteners, so that the outer roller sleeve blocks are firmly fixed to the roller body base.

[0015] As a further improved technical solution of the utility model, the first wear-resistant preformed body and the second wear-resistant preformed body are both higher than the outer roller sleeve base body.

[0016] As a further improved technical solution of the utility model, the middle section of the roller body base is provided with a circle of middle section step bottom plane, the middle section step bottom plane is located between the front section outer surface and the rear section outer surface of the roller body base, and a circle of middle section step bottom plane grooves are also provided on the middle section step bottom plane; the first V-shaped protrusion at the bottom of the rear section of the outer roller sleeve block A is wedge-connected with the middle section step bottom plane groove; the second V-shaped protrusion at the bottom of the rear section of the outer roller sleeve block B is wedge-connected with the middle section step bottom plane groove; "upper pressure and lower clamping" is realized, that is, the tighter the wedge angle of the lower part of the pressure plate block is pressed, the tighter the bottom of the outer roller sleeve block is clamped, the fit is firm and the assembly is simple.

[0017] As a further improved technical solution of the utility model, the wear-resistant structure on the roller body base is a first wear-resistant layer; the outer surface of the rear section of the roller body base includes a first conical surface and a second conical surface, the first conical surface and the second conical surface constitute a two-stage variable cone surface, and the variable cone angle of the two-stage variable cone surface is 5 degrees; the outer surfaces of the first conical surface and the second conical surface are welded with a first wear-resistant layer, the angle between the first wear-resistant layer and the horizontal line is 15 degrees, the front end of the first wear-resistant layer is flush with the bottom plane of the middle step, and the tail end of the first wear-resistant layer is flush with the tail end of the roller body base, and the transition is smooth.

[0018] As a further improved technical solution of the utility model, the outer surface front section of the A outer roller sleeve block is an A flange arc section, the outer surface rear section is an A cone section, the A flange arc section and the A cone section are welded with a second wear-resistant layer, the second wear-resistant layer is flush with the first wear-resistant layer on the roller body substrate, and the tail end of the second wear-resistant layer is flush with the A rear section step surface of the A outer roller sleeve block. The angle between the second wear-resistant layer and the horizontal line is 15 degrees.

[0019] As a further improved technical solution of the utility model, the inner surface of the front section A and the outer surface A of the A outer roller sleeve block constitute a wedge-shaped cone surface, which is a V-shaped structure with a wedge angle of 65 degrees. The inner surface of the front section A and the outer surface A of the A outer roller sleeve block are wedge-shapedly spliced ​​with the inner surface of the pressure ring and the outer surface of the pressure ring block. The bottom of the rear section of the A outer roller sleeve block is provided with a first V-shaped protrusion for wedge-shaped clamping with the middle step bottom plane groove on the roller body base. The first V-shaped protrusion includes the A inner surface, the A rear section bottom plane and the A wedge-shaped cone surface. A plurality of groups of A squares are provided on the inner surface A of the A outer roller sleeve block. A first A semi-U-shaped notch is provided on the inner surface of the A end of one side of the A outer roller sleeve block, and a second A semi-U-shaped notch is provided on the inner surface of the A end of the other side. After the two adjacent A outer roller sleeve blocks are combined, the first A semi-U-shaped notch and the second A semi-U-shaped notch form a first U-shaped notch; a plurality of pin holes are evenly distributed in the circumferential direction of the outer surface of the front section of the roller body base, and cylindrical pins are embedded in the pin holes and the first U-shaped notch, and the inner diameter of the first U-shaped notch is larger than the outer diameter of the cylindrical pin, and a gasket for sealing is also filled between the first U-shaped notch and the middle step bottom plane card groove on the roller body base. The cylindrical pin is provided with a threaded hole for easy disassembly and assembly.

[0020] As a further improved technical solution of the utility model, in the B outer roller sleeve block, the outer surface front section of the outer roller sleeve base is a B flange arc section, the B flange arc section is provided with a plurality of first grooves arranged at intervals and one end of the first groove has an arc, the outer surface rear section of the outer roller sleeve base is a B cone section, the B cone section is provided with a plurality of second grooves arranged at intervals and one side of the second groove has serrations, the first groove and the second groove located in the same row are connected; the rear end of the second wear-resistant preform in the second groove is flush with the B rear section step surface of the outer roller sleeve base. The first wear-resistant preform is embedded in the B flange arc section, and the second wear-resistant preform is embedded in the B cone section. After casting, the flatness is controlled so that the angle between the plane of the wear-resistant preform and the horizontal line is 15 degrees, ensuring that it is flush with the first wear-resistant layer on the roller body base, and the rear end of the second wear-resistant preform is flush with the wedge-shaped bottom plane.

[0021] As a further improved technical solution of the utility model, the inner surface of the front section B and the outer surface B of the B outer roller sleeve block constitute a wedge-shaped cone surface, which is a V-shaped structure with a wedge angle of 65 degrees. The inner surface of the front section B and the outer surface B of the B outer roller sleeve block are in contact with the inner surface of the pressure ring and the outer surface of the pressure ring block. The bottom of the rear section of the B outer roller sleeve block is provided with a second V-shaped protrusion for wedge-shaped engagement with the bottom plane groove of the middle step on the roller body base. The second V-shaped protrusion includes the B inner surface, the bottom plane of the rear section B and the B wedge-shaped cone surface. A plurality of groups of B square grooves are provided on the B inner surface of the B outer roller sleeve block. The inner surface of the B end of one side of the block is provided with a first B semi-U-shaped notch, and the inner surface of the B end of the other side is provided with a second B semi-U-shaped notch. After the two adjacent B outer roller sleeve blocks are combined, the first B semi-U-shaped notch and the second B semi-U-shaped notch form a second U-shaped notch; the outer surface of the front section of the roller body base is evenly distributed with a plurality of pin holes in the circumferential direction, and the number of the pin holes is the same as that of the B outer roller sleeve block. Cylindrical pins are embedded in the pin holes and the second U-shaped notch, and the inner diameter of the second U-shaped notch is larger than the outer diameter of the cylindrical pin. A gasket for sealing is filled between the second U-shaped notch and the middle step bottom plane slot on the roller body base. The cylindrical pin is provided with a threaded hole for easy disassembly and assembly.

[0022] As a further improved technical solution of the utility model, the A outer roller sleeve block is formed by surfacing, and the A outer roller sleeve block is made of cast steel. The first wear-resistant preform and the second wear-resistant preform are both made of metal ceramic preforms, and the outer roller sleeve matrix is ​​made of high-chromium cast iron. The first wear-resistant preform and the second wear-resistant preform are arranged and used in combination in a certain order, with a layer of high-chromium cast iron matrix between every two rows of preforms, and the preforms are slightly higher than the outer roller sleeve matrix. The first wear-resistant preform is strip-shaped and has an arc at one end, and the curvature of its arc surface is connected to the outer surface front section of the outer roller sleeve block, which is the B flange arc section, to improve the firmness of the combination of the two. The second wear-resistant preform is a strip-shaped straight section with serrations on one side, and the outer surface front section connected to the outer roller sleeve block is the B conical section. The serrated structure of the preform can increase the contact surface with the outer roller sleeve matrix, thereby improving the firmness of the combination of the two.

[0023] As a further improved technical solution of the utility model, a plurality of roller threaded holes and locating pin holes for connecting with the pressure ring block are also arranged on the pitch circle of the front step end face of the roller body base; the inner surface of the pressure ring block contacts the inner surface of the step of the roller body base, and an installation gap is maintained between the inner plane of the pressure ring block and the front end face of the roller body base, and a plurality of countersunk bolt holes for connecting with the roller threaded holes on the roller body base through fastening bolts are arranged on the top plane pitch circle of the pressure ring block, and the fastening bolts are hexagonal cylindrical head screws, and a plurality of locating pin holes for connecting with the locating pin holes on the roller body base through locating pins are arranged on the top plane pitch circle of the pressure ring block, and the pressure ring inner surface and the pressure ring outer surface of the pressure ring block constitute a V-shaped wedge-shaped cone surface, and the wedge angle of the V-shaped wedge-shaped cone surface is 65 degrees, and the pressure ring inner surface and the pressure ring outer surface of the pressure ring block are used for wedge-shaped splicing with the front inner surface of the outer roller sleeve block.

[0024] The beneficial effects of the utility model are:

[0025] 1. The circular outer roller sleeve of the utility model adopts a multi-piece split assembly structure, that is, it includes multiple outer roller sleeve blocks. If damage occurs, only the corresponding outer roller sleeve block is removed separately for replacement, and no online maintenance or overall replacement is required. It can be quickly installed to reduce maintenance time, improve work efficiency, and reduce maintenance costs. At the same time, it can avoid the phenomenon that the grinding roller body is directly scrapped due to the wear of the roller sleeve.

[0026] 2. The utility model adopts a mechanical connection method of wedge-shaped structure between the outer roller sleeve blocks and the roller body, which has high connection strength and can withstand the working conditions of high-pressure operation of the grinding roller.

[0027] 3. Different types of outer roller sleeve blocks can be selected according to the on-site material grinding requirements, namely, the A outer roller sleeve block prepared by cast steel surfacing or the B outer roller sleeve block made of metal ceramic and high chromium cast iron. The two have different wear resistance, but the same installation form, strong interchangeability and versatility. In addition, since the outer roller sleeve blocks are small in size and can be stored, if the outer roller sleeve on the grinding roller is damaged, it can be replaced immediately, which has little impact on production.

[0028] 4. The surfacing layer (i.e. the second wear-resistant layer) on the outer surface of the A outer roller sleeve block can be surfacing or repaired separately after damage, which greatly improves the surfacing efficiency and reduces the surfacing and maintenance costs. And the surfacing repair can be reused, saving resources, improving the efficiency of roller sleeve replacement, reducing labor intensity, and improving operational reliability and safety.

[0029] 5. The B outer roller sleeve adopts the "lost foam" block casting process, which can reduce the weight of the casting, with high casting precision and precise size control. The casting processing allowance can be eliminated, the machining cost can be reduced, the casting surface finish is high, the grinding and cleaning time is reduced, and the repeatability is good. Through "one box multiple molds", batch production can be achieved, the yield rate can be improved, the manufacturing cycle can be shortened, and the production cost can be reduced.

[0030] 6. The B outer roller sleeve block is composed of a highly wear-resistant metal ceramic preform and a wear-resistant alloy, which has dual wear resistance and the toughness of metal materials;

[0031] 7. The metal ceramic preform is arranged in a strip-shaped mosaic, and the metal ceramic preform is slightly higher than the wear-resistant alloy substrate (i.e., the outer roller sleeve substrate). During operation and wear, different wear-resistant materials on the surface form a height difference, which helps to improve the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the structure of an existing integral vertical mill roller sleeve.

[0033] Figure 2 This is a schematic diagram of the structure of the combined vertical mill roller sleeve of the utility model.

[0034] Figure 2 (a) is a schematic diagram of the structure of the combined vertical grinding roller sleeve of the utility model.

[0035] Figure 2 (b) is a schematic structural diagram of the A outer roller sleeve blocks in the combined vertical mill roller sleeve of the utility model.

[0036] Figure 2 (c) is a schematic structural diagram of the B outer roller sleeve blocks in the combined vertical mill roller sleeve of the utility model.

[0037] Figure 3 It is a schematic structural diagram of the roller body base and the A outer roller sleeve block (one A outer roller sleeve block is hidden) formed by surfacing welding in the combined vertical mill roller sleeve of Example 1.

[0038] Figure 4 It is a schematic diagram of the roller body base and B outer roller sleeve block (one B outer roller sleeve block is hidden) formed by surfacing welding in the combined vertical mill roller sleeve of Example 2 and the structure.

[0039] Figure 5 It is a schematic diagram of the roller base structure of the utility model.

[0040] Figure 6 It is a schematic structural diagram of a circular outer roller sleeve formed by splicing multiple A outer roller sleeves in blocks in Example 1.

[0041] Figure 7It is a partial cross-sectional view of the roller body base and the A outer roller sleeve block formed by surfacing welding in the combined vertical mill roller sleeve of Example 1.

[0042] Figure 8 It is a schematic diagram of a partial cross-sectional view of the roller body base and the A outer roller sleeve block formed by surfacing welding in the combined vertical mill roller sleeve of Example 1.

[0043] Fig. 9 It is a schematic structural diagram of the A outer roller sleeve blocks of Example 1.

[0044] Fig.10 It is a schematic diagram of a partial cross-sectional view of the A outer roller sleeve block of Example 1.

[0045] Fig.11 It is a schematic structural diagram of a circular outer roller sleeve formed by splicing multiple B outer roller sleeves in blocks in Example 2.

[0046] Fig.12 It is a partial cross-sectional view of the roller body base and the B outer roller sleeve block formed by surfacing welding in the combined vertical mill roller sleeve of Example 2.

[0047] Fig.13 It is a schematic diagram of a partial cross-sectional view of the roller body base and the B outer roller sleeve block formed by surfacing welding in the combined vertical mill roller sleeve in Example 2.

[0048] Fig.14 It is a schematic diagram of the structure of the B outer roller sleeve blocks in Example 2.

[0049] Fig.15 It is a schematic diagram of the partial cross-sectional angle of the B outer roller sleeve block in Example 2.

[0050] Fig.16 It is a schematic diagram of the block structure of the pressure ring of the utility model. DETAILED DESCRIPTION

[0051] The specific implementation of the utility model is further described below according to the accompanying drawings:

[0052] See also Figure 1 As shown in the schematic diagram of the existing integral vertical mill roller sleeve structure, the conventional roller sleeve 1 is an integral structure, and the outer surface is finely processed and then the wear-resistant layer 2 is welded as a whole. Since the roller sleeve 1 is installed on the roller core and is installed inside the vertical mill, the on-site environmental conditions are poor, and the roller sleeve 1 and the roller core are tightly matched with tolerances. During maintenance, the roller sleeve 1 needs to be disassembled as a whole, which makes on-site disassembly and assembly difficult and requires high professional and technical capabilities of the operators. In addition, because it is an integral roller sleeve structure, it is difficult to repair the surface wear-resistant layer by welding in the later stage, and the work efficiency is low. In addition, the company is required to stock the roller sleeve 1 as a spare part, which is costly.

[0053] See also Figure 2 , Figure 3 and Figure 4 As shown in the schematic diagram of the structure of the combined vertical mill roller sleeve, the novel combined vertical mill roller sleeve adopts two combination forms of "roller body substrate formed by surfacing welding + outer roller sleeve block A formed by surfacing welding" in Example 1 or "roller body substrate formed by surfacing welding + outer roller sleeve block B formed by metal ceramic and high chromium cast iron composite" in Example 2, including a roller body substrate 101, an outer roller sleeve block 102, a pressure ring block 103, a cylindrical pin 104, a fastening bolt 105, a positioning pin 106, and a cushion block 107, wherein the contact surfaces of the roller body substrate 101, the outer roller sleeve block 102, and the pressure ring block 103 are all wedge-shaped structures, the outer roller sleeve block 102 and the pressure ring block 103 are both designed in blocks, the roller body substrate 101 can be surfacing welded separately, and the outer roller sleeve block 102 is divided into two structural forms, namely the A outer roller sleeve block 102-1 described in Example 1 and the B outer roller sleeve block 102-2 in Example 2.

[0054] The following is a detailed introduction to Examples 1-2.

[0055] Embodiment 1:

[0056] A new type of combined vertical mill roller sleeve, belonging to a new type of combined cladding wear-resistant roller sleeve, such as Figure 3 As shown, it includes a roller body base 101, multiple A outer roller sleeve blocks 102-1 and multiple pressure ring blocks 103; the rear section outer surface of the roller body base 101 has a wear-resistant structure, the multiple A outer roller sleeve blocks 102-1 are respectively located on the front section outer surface 1.3 of the roller body base 101 and the multiple A outer roller sleeve blocks 102-1 are spliced ​​to form a circular outer roller sleeve, the multiple pressure ring blocks 103 are wedge-shaped spliced ​​with the circular outer roller sleeve and the pressure ring blocks 103 are connected to the roller body base 101 by fasteners.

[0057] The outer surface of the roller body base 101 is welded with a first wear-resistant layer 3 (i.e., a wear-resistant structure), and the material of the roller body base 101 can be ZG20Mn, and the first wear-resistant layer 3 can be made of high chromium alloy. The A outer roller sleeve block 102-1 can be welded separately, and the outer surface of the A outer roller sleeve block 102-1 is also welded with a second wear-resistant layer 4, and the second wear-resistant layer 4 can be made of high chromium alloy. A plurality of cylindrical pins 104 are evenly arranged on the contact surface between the roller body base 101 and the A outer roller sleeve block 102-1, and the semi-U-shaped notches at both ends of the A outer roller sleeve block 102-1 are used to limit the displacement of the A outer roller sleeve block 102-1 in the circumferential direction of the outer surface of the roller body base 101. A cushion block 107 is arranged in the cavity at the bottom of the cylindrical pin 104, and the cushion block 107 is made of rubber block to seal and prevent materials from entering the cavity through the gap between the blocks. A first V-shaped protrusion is arranged at the bottom of the A outer roller sleeve block 102-1 to cooperate with the V-shaped groove on the bottom plane of the middle step of the roller body base 101 for positioning, and the wedge angle of the contact surface between the pressure ring block 103 and the A outer roller sleeve block 102-1 is used to press tightly, and then the pressure ring block 103 is locked by the fastening bolt 105, and the A outer roller sleeve block 102-1 is firmly fixed on the roller body base 101 by means of bolt torque, that is, a plurality of A outer roller sleeve blocks 102-1 are spliced ​​with each other to form a circular outer roller sleeve, a plurality of pressure ring blocks 103 are wedge-shapedly spliced ​​with the circular outer roller sleeve, and the pressure ring block 103 and the roller body base 101 are positioned by the locating pin 106, and are connected by the fastening bolt 105.

[0058] See also Figure 5 As shown in the structural schematic diagram of the roller body base 101, the roller body base 101 adopts a two-stage wedge-shaped structure design. The contact surface between the front section outer surface 1.3 of the roller body base 101 and the middle section step bottom plane 1.4 and the A outer roller sleeve block 102-1 is a wedge-shaped conical surface, which is a V-shaped structure. The middle section step bottom plane groove 1.9 is provided on the middle section step bottom plane 1.4 of the roller body base 101, that is, a V-shaped groove structure is adopted. The wedge angle of the wedge-shaped conical surface of the V-shaped groove is 15 degrees, so as to realize the wedge-shaped clamping connection with the first V-shaped protrusion at the bottom of the A outer roller sleeve block 102-1, as shown in FIG. Figure 8As shown, the wedge angle is 75 degrees, and a plurality of pin holes 1.5 are evenly distributed in the circumferential direction on the front section outer surface 1.3 of the wedge cone surface for installing cylindrical pins 104. The number of the pin holes 1.5 matches the number of the A outer roller sleeve block 102-1. The step inner surface 1.10 of the roller body base 101 contacts the inner surface 4.1 of the pressure ring block 103, which can realize the inner side limit of the pressure ring block 103 during the inward contraction and tightening process. The front section step end surface 1.6 of the roller body base 101 A plurality of roller threaded holes 1.7 are evenly arranged on the pitch circle for installing fastening bolts 105, and the roller threaded holes 1.7 match the countersunk bolt holes 4.7 of the pressure ring block 103, and a plurality of positioning pin holes 1.8 are synchronously arranged on the pitch circle of the front step end surface 1.6 of the roller body base 101 for installing positioning pins 106, and the positioning pins 106 are internal thread cylindrical pins, and the positioning pin holes 1.8 and the positioning pin holes 1.4.8 of the pressure ring block 103 are integrally drilled and reamed. The rear section outer surface of the roller body base 101 is the first section conical surface 1.1 and the second section conical surface 1.2. Due to the different degrees of wear of each area of ​​the roller surface, the roller surface wears less from the large end to the small end, so the first section conical surface 1.1 and the second section conical surface 1.2 adopt a two-stage variable cone design, and the variable cone angle is 5 degrees. The roller body adopts a double-layer structure. The roller body substrate 101 is a cast steel part. The outer surfaces of the first cone surface 1.1 and the second cone surface 1.2 are welded with a first wear-resistant layer 3 by open arc welding using a high-chromium alloy flux-cored welding wire. The hardness can reach 55-58HRC. After welding the first wear-resistant layer 3, the thickness and flatness of the wear-resistant layer are controlled. The angle between the wear-resistant surface and the horizontal line is 15 degrees. The front end of the first wear-resistant layer 3 is flush with the bottom plane 1.4 of the middle step, and the tail end of the first wear-resistant layer 3 is flush with the tail end of the roller body substrate 101, and the transition is smooth. Figure 7 shown.

[0059] See also Figure 6 , Fig. 9 and Fig.10As shown in the structural schematic diagram of the A outer roller sleeve block 102-1, the A outer roller sleeve block 102-1 adopts a block design to control the weight of the A outer roller sleeve block 102-1 within 20kg to reduce labor intensity. The inner surface of the A outer roller sleeve block 102-1 adopts a two-stage wedge-shaped structure design. The end faces of the two A end portions 2.10 of the A outer roller sleeve block 102-1 remove gaps respectively. The contact surfaces of the A front segment inner surface 2.9 and the A outer surface 2.11 of the A outer roller sleeve block 102-1 and the pressure ring inner surface 4.2 and the pressure ring outer surface 4.3 of the pressure ring block 103 are wedge-shaped conical surfaces and are matched with each other. They are V-shaped structures with a wedge angle of 65 degrees. During the pressing process of the pressure ring block 103, the wedge angle can be used to shrink the A outer roller sleeve block 102-1 to achieve the purpose of tightening. The contact surfaces of the A inner surface 2.1 and the A rear step surface 2.4 of the A outer roller sleeve block 102-1 with the roller body base 101 are wedge-shaped conical surfaces and are designed in a matching manner, forming a V-shaped structure with a wedge angle of 75 degrees. A first V-shaped protrusion is arranged at the bottom of the rear section of the A outer roller sleeve block 102-1, comprising an A inner surface 2.1, an A rear section bottom plane 2.6 and an A wedge-shaped conical surface 2.5. The contact surface between the first V-shaped protrusion and the groove 1.9 on the bottom plane of the middle step of the roller body base 101 is a wedge-shaped conical surface and is designed in a matching manner. It is a V-shaped structure with a wedge angle of 15 degrees. The first V-shaped protrusion is wedge-connected with the groove 1.9 on the bottom plane of the middle step of the roller body base 101. A plurality of groups of A square grooves 2.12 are arranged on the A inner surface 2.1 of the A outer roller sleeve block 102-1, which can reduce the contact surface with the roller body base 101. Generally speaking, the contact surface only needs to be ≥70% to meet the requirements. The arrangement of the A square grooves 2.12 can greatly reduce weight on the one hand, and avoid installation errors caused by deformation on the other hand. A first A semi-U-shaped notch 2.7 is provided on the inner surface of the A end 2.10 on one side of the A outer roller sleeve block 102-1, and a second A semi-U-shaped notch 2.8 is provided on the inner surface of the A end 2.10 on the other side. The notch formed by combining two adjacent A outer roller sleeve blocks 102-1 forms a first U-shaped notch, and a cylindrical pin 104 is embedded in the pin hole 1.5 on the front section outer surface 1.3 of the roller body base 101 and the U-shaped notch, and the inner diameter of the first U-shaped notch is larger than the outer diameter of the cylindrical pin 104, which is convenient for disassembly and assembly.

[0060] The base of the A outer roller sleeve block 102-1 is made of cast steel, and is cast in blocks. The outer surface is welded with a second wear-resistant layer 4 by open arc welding with a high chromium alloy flux-cored wire, and the hardness can reach 55-58HRC. Since the wear degree of this area is relatively high, the wear-resistant layer partition can be optimized and the thickness of the second wear-resistant layer 4 can be increased during design. The front section of the outer surface of the A outer roller sleeve block 102-1 is the A flange arc section 2.3, which is Fig.10The "R zone" in the figure is the lowest point of the roller sleeve and the grinding area with the material on the outside of the grinding disc. Although the "R zone" adopts the method of corner welding wear-resistant layer, due to the extrusion of the material between the roller sleeve and the grinding disc, the stress is concentrated in the "R zone", the wear-resistant layer has poor toughness and is prone to cracks. Therefore, if the size of the body flange is small, there will be a hidden danger of the wear-resistant layer in the "R zone" falling off. Therefore, the thickness of the surfacing wear-resistant layer in the "R zone" and the front section of the "R zone" should be reduced, the fillet radius of the "R zone" should be increased, and the thickness of the surfacing wear-resistant layer in the rear section of the "R zone" should be increased. The rear section of the "R zone" is the A conical surface section 2.2, and the A flange arc section 2.3 and the A conical surface section 2.2 are welded with a second wear-resistant layer 4. After welding the second wear-resistant layer 4, the flatness and thickness are controlled so that the angle between the wear-resistant surface and the horizontal line is 15 degrees, ensuring that it is flush with the first wear-resistant layer 3 on the roller body base 101, and at the same time, the tail end of the second wear-resistant layer 4 is flush with the step surface 2.4 of the A rear section.

[0061] See also Fig.16 As shown in the schematic diagram of the pressure ring block structure, the pressure ring block 103 adopts a block design, the two pressure ring end faces 4.6 of the pressure ring block 103 are respectively freed of gaps, the bottom plane 4.4 and the front step end face 1.6 of the roller body base 101 retain an installation gap, the inner surface 4.1 contacts the step inner surface 1.10 of the roller body base 101, and the inner side limit of the pressure ring block 103 during the inward contraction and tightening process can be achieved, and a plurality of sinker bolt holes 4.7 are evenly arranged on the pitch circle of the top plane 4.5. The bolt hole 4.7 of the sinker matches the roller threaded hole 1.7 of the roller body base 101, and is used to install the fastening bolt 105. The fastening bolt 105 adopts a hexagon socket head screw, and a plurality of positioning pin holes 4.8 are synchronously arranged on the pitch circle of the top plane 4.5 for installing the positioning pin 106. Two positioning pin holes 4.8 are arranged on each pressure ring. The positioning pin holes 4.8 and the positioning pin holes 1.8 on the front step end face 1.6 of the roller body base 101 are integrally drilled and reamed. The contact surface between the inner surface 4.2 and the outer surface 4.3 of the pressure ring block 103 and the A outer roller sleeve block 102-1 is a wedge-shaped cone surface and is designed in a matching manner. It is a V-shaped structure with a wedge angle of 65 degrees. During the pressing process of the pressure ring block 103, the wedge angle can be used to shrink the A outer roller sleeve block 102-1 inward to achieve the purpose of tightening.

[0062] See also Figure 7 The cylindrical pin 104 is used in conjunction with the pin hole 1.5 on the outer surface 1.3 of the front section of the roller body base 101 and the first A semi-U-shaped notch 2.7 and the second A semi-U-shaped notch 2.8 of the A outer roller sleeve block 102-1 to play a limiting role. After the cylindrical pin 104 is installed, the A outer roller sleeve block 102-1 can be prevented from moving in the circumferential direction. The height of the cylindrical pin 104 is lower than the U-shaped notch on the A outer roller sleeve block 102-1 to prevent interference with the installation of the A outer roller sleeve block 102-1. A threaded hole is provided on the cylindrical pin 104 for easy disassembly and assembly.

[0063] In the above embodiment, the A outer roller sleeve block 102-1 is formed by surfacing welding of cast steel.

[0064] The assembly process of this embodiment 1 is as follows: according to the welding requirements, firstly, a first wear-resistant layer 3 is built-up on the outer surface of the roller body base 101, and a second wear-resistant layer 4 is built-up on the outer surface of the A outer roller sleeve block 102-1, and then a plurality of A outer roller sleeve blocks 102-1 are respectively placed on the front section outer surface 1.3 of the roller body base 101, and a cylindrical pin 104 is installed in the pin hole 1.5, and the rear section V-shaped protrusions of the plurality of A outer roller sleeve blocks 102-1 are wedge-engaged with the groove 1.9 of the bottom plane of the middle section step of the roller body base 101 in sequence, and the A inner surface 2.1 and the A rear section step surface 2.4 of the A outer roller sleeve block 102-1 are connected to the roller body base 101. The front section outer surface 1.3 and the middle section step bottom plane 1.4 of the body base 101 are wedge-jointed, and finally the pressure ring inner surface 4.2 and the pressure ring outer surface 4.3 of multiple pressure ring blocks 103 are wedge-joined with the A front section inner surface 2.9 and the A outer surface 2.11 of the A outer roller sleeve block 102-1, and the positioning pin 106 is installed in the positioning pin hole of the pressure ring block 103 to align the countersunk bolt hole 4.7 on the pressure ring block 103 with the roller body threaded hole 1.7 of the roller body base 101, and connected with the fastening bolt 105, the pressure ring block 103 fastens the A outer roller sleeve block 102-1 to the roller body base 101. After assembly, there is a gap between the joint surfaces of every two A outer roller sleeve blocks 102-1, usually 1mm, so that the two A end faces 2.10 of each A outer roller sleeve block 102-1 are indented by 0.5mm on one side, that is, a gap of 0.5mm is removed. After assembly, there is a gap between the joint surfaces of every two pressure ring blocks 103, usually 2mm, so that the pressure ring end faces 4.6 of each pressure ring block 103 are indented by 1mm on one side, that is, a gap of 1mm is removed. There is a gap between the bottom plane 4.4 of the pressure ring block 103 and the front step end face 1.6 of the roller body base 101, usually 2mm, that is, 2mm is avoided. There is a gap between the bottom plane 2.6 of the A rear section of the A outer roller sleeve block 102-1 and the bottom face 1.4 of the middle step of the roller body base, usually 1mm, that is, 1mm is avoided. Figure 8 shown.

[0065] Embodiment 2:

[0066] A new type of combined vertical mill roller sleeve, belonging to a new type of combined metal-ceramic composite wear-resistant roller sleeve, such as Figure 4 As shown, it includes a roller body base 101, multiple B outer roller sleeve blocks 102-2 and multiple pressure ring blocks 103; the rear section outer surface of the roller body base 101 has a wear-resistant structure, the multiple B outer roller sleeve blocks 102-2 are respectively located on the front section outer surface 1.3 of the roller body base 101 and the multiple B outer roller sleeve blocks 102-2 are spliced ​​to form a circular outer roller sleeve, the multiple pressure ring blocks 103 are wedge-shaped spliced ​​with the circular outer roller sleeve and the pressure ring blocks 103 are connected to the roller body base 101 by fasteners.

[0067] B outer roller sleeve block 102-2 includes an outer roller sleeve base body, a front section of the outer surface of the outer roller sleeve base body is provided with a plurality of first grooves 120 arranged at intervals, a rear section of the outer surface of the outer roller sleeve base body is provided with a plurality of second grooves 121 arranged at intervals, a first wear-resistant preform 5 is embedded in the first groove 120, and a second wear-resistant preform 6 is embedded in the second groove 121.

[0068] The B outer roller sleeve block 102-2 can be prepared separately. The B outer roller sleeve block 102-2 and the B outer roller sleeve block 102-2 in Example 1 belong to two forms of outer roller sleeve blocks. Except for the different materials and wear resistance forms, the sizes of other installation matching surfaces are the same. On the basis of sharing the roller body base 101 and the pressure ring block 103, they can be installed interchangeably to improve manufacturing efficiency.

[0069] Among them, the outer surface of the roller body base 101 is welded with a first wear-resistant layer 3. The outer surface of the B outer roller sleeve block 102-2 is provided with a first groove 120 and a second groove 121 in a combined arrangement, and the size of the groove matches the shape of the metal ceramic preform, wherein one end of the first groove 120 is provided with an arc to embed the first wear-resistant preform 5, and one side of the second groove 121 is provided with a sawtooth to embed the second wear-resistant preform 6. The first wear-resistant preform 5 and the second wear-resistant preform 6 are made of metal ceramic preforms. A plurality of cylindrical pins 104 are evenly arranged on the contact surface between the roller body base 101 and the B outer roller sleeve block 102-2, and the semi-U-shaped notches at both ends of the B outer roller sleeve block 102-2 are used to limit the displacement of the B outer roller sleeve block 102-2 in the circumferential direction of the outer surface of the roller body base 101. A cushion block 107 is provided in the cavity at the bottom of the cylindrical pin 104, and the cushion block 107 is made of a rubber block to seal and prevent the material from entering the cavity through the gap between the blocks. A second V-shaped protrusion is set at the bottom of the B outer roller sleeve block 102-2 to cooperate with the V-shaped groove on the bottom plane of the middle step of the roller body base 101 for positioning, and the wedge angle of the contact surface between the pressure ring block 103 and the B outer roller sleeve block 102-2 is used to press, and then the pressure ring block 103 is locked by the fastening bolt 105, and the B outer roller sleeve block 102-2 is firmly fixed on the roller body base 101 by means of bolt torque, that is, multiple B outer roller sleeve blocks 102-2 are spliced ​​with each other to form a circular outer roller sleeve, multiple pressure ring blocks 103 are wedge-shaped spliced ​​with the circular outer roller sleeve, and the pressure ring block 103 and the roller body base 101 are positioned by the positioning pin 106, and are connected by the fastening bolt 105.

[0070] See also Figure 5As shown in the structural schematic diagram of the roller body base 101, the roller body base 101 adopts a two-stage wedge-shaped structure design. The contact surface between the front section outer surface 1.3 of the roller body base 101, the middle section step bottom plane 1.4 and the B outer roller sleeve block 102-2 is a wedge-shaped conical surface, which is a V-shaped structure. The middle section step bottom plane clamping groove 1.9 is arranged on the middle section step bottom plane 1.4 of the roller body base 101. The V-shaped clamping groove structure is adopted. The wedge angle of the wedge-shaped conical surface of the V-shaped clamping groove is 15 degrees, so as to realize the wedge-shaped clamping connection with the second V-shaped protrusion at the bottom of the B outer roller sleeve block 102-2. Fig.13 As shown, the wedge angle is 75 degrees, and a plurality of pin holes 1.5 are evenly distributed in the circumferential direction on the front section outer surface 1.3 of the wedge cone surface for installing cylindrical pins 104. The number of the pin holes 1.5 matches the number of the B outer roller sleeve block 102-2. The step inner surface 1.10 of the roller body base 101 contacts the inner surface 4.1 of the pressure ring block 103, which can realize the inner side limit of the pressure ring block 103 during the inward contraction and tightening process. The front section step end surface 1.6 of the roller body base 101 A plurality of roller threaded holes 1.7 are evenly arranged on the pitch circle for installing fastening bolts 105, and the roller threaded holes 1.7 match the countersunk bolt holes 4.7 of the pressure ring block 103, and a plurality of positioning pin holes 1.8 are synchronously arranged on the pitch circle of the front step end surface 1.6 of the roller body base 101 for installing positioning pins 106, and the positioning pins 106 are internal thread cylindrical pins, and the positioning pin holes 1.8 and the positioning pin holes 1.4.8 of the pressure ring block 103 are integrally drilled and reamed. The rear section outer surface of the roller body base 101 is the first section conical surface 1.1 and the second section conical surface 1.2. Due to the different degrees of wear of each area of ​​the roller surface, the roller surface wears less from the large end to the small end, so the first section conical surface 1.1 and the second section conical surface 1.2 adopt a two-stage variable cone design, and the variable cone angle is 5 degrees. The roller body adopts a double-layer structure. The roller body substrate 101 is a cast steel part. The outer surfaces of the first cone surface 1.1 and the second cone surface 1.2 are welded with a first wear-resistant layer 3 by open arc welding using a high-chromium alloy flux-cored welding wire. The hardness can reach 55-58HRC. After welding the first wear-resistant layer 3, the thickness and flatness of the wear-resistant layer are controlled. The angle between the wear-resistant surface and the horizontal line is 15 degrees. The front end of the first wear-resistant layer 3 is flush with the bottom plane 1.4 of the middle step, and the tail end of the first wear-resistant layer 3 is flush with the tail end of the roller body substrate 101, and the transition is smooth. Fig.12 shown.

[0071] See also Fig.11 , Fig.14 and Fig.15As shown in the structural schematic diagram of the B outer roller sleeve block 102-2, the B outer roller sleeve block 102-2 adopts a block design to control the weight of the B outer roller sleeve block 102-2 within 20kg to reduce labor intensity. The inner surface of the B outer roller sleeve block 102-2 adopts a two-stage design with a wedge structure. The end faces of the two B end portions 3.10 of the B outer roller sleeve block 102-2 remove gaps respectively. The contact surfaces of the B front segment inner surface 3.9 and the B outer surface 3.11 of the B outer roller sleeve block 102-2 and the pressure ring inner surface 4.2 and the pressure ring outer surface 4.3 of the pressure ring block 103 are wedge-shaped conical surfaces and are matched with each other. They are V-shaped structures with a wedge angle of 65 degrees. During the pressing process of the pressure ring block 103, the wedge angle can be used to shrink the B outer roller sleeve block 102-2 to achieve the purpose of tightening. The contact surfaces of the B inner surface 3.1 and the B rear step surface 3.4 of the B outer roller sleeve block 102-2 with the roller body base 101 are wedge-shaped conical surfaces and are designed in a matching manner, forming a V-shaped structure with a wedge angle of 75 degrees. A second V-shaped protrusion is arranged at the bottom of the rear section of the B outer roller sleeve block 102-2, including a B inner surface 3.1, a B rear section bottom plane 3.6 and a wedge-shaped conical surface 3.5. The contact surface with the groove 1.9 of the bottom plane of the middle step of the roller body base 101 is a wedge-shaped conical surface and is designed in a matching manner. It is a V-shaped structure with a wedge angle of 15 degrees. The second V-shaped protrusion is wedge-connected with the groove 1.9 of the bottom plane of the middle step of the roller body base 101. A plurality of groups of B square grooves 3.12 are arranged on the B inner surface 3.1 of the B outer roller sleeve block 102-2, which can reduce the contact surface with the roller body base 101. Generally speaking, the contact surface only needs to be ≥70% to meet the requirements. The arrangement of the B square grooves 3.12 can greatly reduce weight on the one hand, and avoid installation errors caused by deformation on the other hand. A first B semi-U-shaped notch 3.7 is provided on the inner surface of the B end 3.10 on one side of the B outer roller sleeve block 102-2, and a second B semi-U-shaped notch 3.8 is provided on the inner surface of the B end 3.10 on the other side. The notches of the two adjacent B outer roller sleeve blocks 102-2 are combined to form a U-shaped notch, and a cylindrical pin 104 is embedded in the pin hole 1.5 on the outer surface 1.3 of the front section of the roller body base 101 and the U-shaped notch, and the inner diameter of the U-shaped notch is larger than the outer diameter of the cylindrical pin 104, which is convenient for disassembly and assembly.

[0072] The B outer roller sleeve block 102-2 adopts the combination of "outer layer adhesive inlaid metal ceramic preform + high chromium cast iron matrix", adopts the block casting method, uses the "lost foam" casting process, and casts the two together into one, and realizes mass production through the "one box multiple molds" method. The outer roller sleeve matrix is ​​made of high chromium cast iron, and the hardness can reach 58-61HRC after heat treatment, while the metal ceramic composite preform is formed by vacuum sintering, and the hardness can reach 68-71HRC. The outer surface front section of the B outer roller sleeve block 102-2 is the B flange arc section 3.3, which is Fig.10The "R zone" in the figure is the lowest point of the roller sleeve and is also the grinding area with the material on the outside of the grinding disc. The rear section of the "R zone" is the B conical surface section 3.2, the B flange arc section 3.3 is inlaid with the first wear-resistant preform 5, and the B conical surface section 3.2 is inlaid with the second wear-resistant preform 6. The first and second wear-resistant preforms are arranged and used in combination in a certain order. A layer of high chromium cast iron matrix is ​​separated between each two rows of wear-resistant preforms, and the wear-resistant preforms are slightly higher than the outer roller sleeve matrix. The first wear-resistant preform 5 is strip-shaped and has an arc at one end. The curvature of its arc surface is connected with the curvature of the outer surface front section of the B outer roller sleeve block 102-2, which is the B flange arc section 3.3, to improve the firmness of the combination of the two. The second wear-resistant preform 6 is a strip-shaped straight section with serrations on one side. The outer surface front section connected to the B outer roller sleeve block 102-2 is the B conical surface section 3.2. The serrated structure of the preform can increase the contact surface with the outer roller sleeve base and improve the firmness of the combination of the two. After casting, the flatness is controlled so that the angle between the plane of the metal ceramic preform and the horizontal line is 15 degrees, ensuring that it is flush with the first wear-resistant layer 3 on the roller body base 101, and at the same time, the rear end of the second wear-resistant preform 6 is flush with the rear step surface 3.4.

[0073] See also Fig.16 As shown in the structural schematic diagram of the pressure ring block 103, the pressure ring block 103 adopts a block design, the gaps are removed from the two pressure ring end faces 4.6 of the pressure ring block 103, the bottom plane 4.4 and the front step end face 1.6 of the roller body base 101 retain the installation gap, the inner surface 4.1 contacts the step inner surface 1.10 of the roller body base 101, and the inner side limit of the pressure ring block 103 during the inward contraction and tightening process can be achieved, and a plurality of sinker bolt holes 4 are evenly arranged on the pitch circle of the top plane 4.5. .7, the sink bolt hole 4.7 matches the roller threaded hole 1.7 of the roller body base 101, and is used to install the fastening bolt 105. The fastening bolt 105 adopts a hexagon socket head screw, and a plurality of positioning pin holes 4.8 are synchronously arranged on the pitch circle of the top plane 4.5 for installing the positioning pin 106. Two positioning pin holes 4.8 are arranged on each pressure ring. The positioning pin holes 4.8 and the positioning pin holes 1.8 on the front step end face 1.6 of the roller body base 101 are integrally drilled and reamed. The contact surface between the inner surface 4.2 and the outer surface 4.3 of the pressure ring block 103 and the B outer roller sleeve block 102-2 is a wedge-shaped cone surface and is designed in a matching manner. It is a V-shaped structure with a wedge angle of 65 degrees. During the pressing process of the pressure ring block 103, the wedge angle can be used to shrink the B outer roller sleeve block 102-2 inward to achieve the purpose of tightening.

[0074] See also Fig.12The cylindrical pin 104 is used in conjunction with the pin hole 1.5 on the outer surface 1.3 of the front section of the roller body base 101 and the first B semi-U-shaped notch 3.7 and the second B semi-U-shaped notch 3.8 of the B outer roller sleeve block 102-2 to play a limiting role. After the cylindrical pin 104 is installed, the B outer roller sleeve block 102-2 can be prevented from moving in the circumferential direction. The height of the cylindrical pin 104 is lower than the U-shaped notch on the B outer roller sleeve block 102-2 to prevent interference with the installation of the B outer roller sleeve block 102-2. A threaded hole is provided on the cylindrical pin 104 for easy disassembly and assembly.

[0075] The assembly process of this embodiment 2 is as follows: according to the welding requirements, firstly, the first wear-resistant layer 3 is built-up on the outer surface of the roller body base 101, and the outer surface of the B outer roller sleeve block 102-2 is compositely cast with a metal ceramic preform by "using the lost foam" process, and then multiple B outer roller sleeve blocks 102-2 are respectively placed on the front section outer surface 1.3 of the roller body base 101, and a cylindrical pin 104 is installed in the pin hole 1.5, and the rear section second V-shaped protrusions of multiple B outer roller sleeve blocks 102-2 are wedge-connected with the bottom plane card groove 1.9 of the middle section step of the roller body base 101 in sequence, and the B inner surface 3.1 of the B outer roller sleeve block 102-2 and the B rear section step The surface 3.4 is wedge-jointed with the front outer surface 1.3 and the middle step bottom plane 1.4 of the roller body base 101, and finally the pressure ring inner surface 4.2 and the pressure ring outer surface 4.3 of multiple pressure ring blocks 103 are wedge-jointed with the B front inner surface 3.9 and the B outer surface 3.11 of the B outer roller sleeve block 102-2, and the positioning pin hole of the pressure ring block 103 is installed with the positioning pin 106 to align the countersunk bolt hole 4.7 on the pressure ring block 103 with the roller body threaded hole 1.7 of the roller body base 101, and connected with the fastening bolt 105, the pressure ring block 103 fastens the B outer roller sleeve block 102-2 to the roller body base 101. After assembly, there is a gap between the joint surfaces of every two B outer roller sleeve blocks 102-2, usually 1mm, so that the two B end faces 3.10 of each B outer roller sleeve block 102-2 are indented by 0.5mm on one side, that is, a gap of 0.5mm is removed. After assembly, there is a gap between the joint surfaces of every two pressure ring blocks 103, usually 2mm, so that the pressure ring end faces 4.6 of each pressure ring block 103 are indented by 1mm on one side, that is, a gap of 1mm is removed. There is a gap between the bottom plane 4.4 of the pressure ring block 103 and the front step end face 1.6 of the roller body base 101, usually 2mm, that is, 2mm is avoided. There is a gap between the bottom plane 3.6 of the B rear section of the B outer roller sleeve block 102-2 and the bottom face 1.4 of the middle step of the roller body base, usually 1mm, that is, 1mm is avoided. Fig.13 shown.

[0076] The manufacturing process of the B outer roller sleeve block 102-2 in the utility model includes the following steps:

[0077] (1) mixing the pre-treated and dried ceramic particles, alloy powder and binder in a certain proportion, pressing them into a specific shape through a special mold, drying and forming them to obtain a preform, and then preparing a high-hardness metal-ceramic composite preform by a vacuum sintering method;

[0078] (2) preparing a plurality of groups of metal ceramic preforms according to the method of step (1), wherein each group of metal ceramic preforms is an integrated structure in which a first wear-resistant preform and a second wear-resistant preform are fixedly connected to each other;

[0079] (3) Reusing the "lost foam" casting process, multiple groups of metal ceramic preforms are bonded to a foam plastic model with the same size and shape as the outer roller sleeve substrate by gluing and inlaying to form a model cluster. After being coated with refractory coating and dried, the preforms are buried in dry quartz sand for three-dimensional vibration molding. Molten liquid metal is poured into the casting sand box under negative pressure to heat and vaporize the foam plastic model, which is then replaced by liquid metal and cooled and solidified to form a one-time molded metal ceramic composite wear-resistant B outer roller sleeve block 102.

[0080] Furthermore, the ceramic particles in step (1) are one or a combination of any of aluminum oxide, zirconium oxide, silicon carbide, titanium carbide, tungsten carbide, and titanium nitride.

[0081] Furthermore, the alloy powder in step (1) is one of iron-based alloy powder, nickel-based alloy powder or cobalt-based alloy powder, or a combination of any of them.

[0082] Furthermore, the binder in step (1) is one or a combination of any of silica sol, water glass, aluminum sol, sodium carbonate, polyvinyl alcohol, and phenolic resin.

[0083] Furthermore, the liquid metal in step (3) is high chromium cast iron.

[0084] The circular outer roller sleeve of the utility model adopts a multi-piece split assembly structure. When damage occurs, only the corresponding piece needs to be disassembled separately for replacement. There is no need for online maintenance and overall replacement. It can be quickly installed to reduce maintenance time, improve work efficiency, and reduce maintenance costs. At the same time, it can avoid the phenomenon that the grinding roller body is directly scrapped due to the wear of the roller sleeve.

[0085] The utility model adopts a mechanical connection mode of wedge-shaped structure cooperation between the outer roller sleeve blocks and the roller body, which has high connection strength and can withstand the working conditions of high-pressure operation of the grinding roller.

[0086] The utility model can select different types of outer roller sleeve blocks according to the on-site material grinding requirements, that is, A outer roller sleeve blocks or B outer roller sleeve blocks, the wear resistance of the two is different, but the installation form is the same, the interchangeability and versatility are strong, and because the outer roller sleeve blocks are small in size and can be stored, if the outer roller sleeve on the grinding roller is damaged, it can be replaced immediately, which has little impact on production.

[0087] The surfacing layers of the outer roller sleeve of the utility model can be surfacing or repaired separately after being damaged, which greatly improves the surfacing efficiency and reduces the surfacing and maintenance costs. Moreover, the surfacing can be reused after repair, which saves resources, improves the efficiency of replacing the roller sleeve, reduces labor intensity, and improves the reliability and safety of operation.

[0088] The utility model adopts the "lost foam" block casting process for the B outer roller sleeve, which can reduce the weight of the casting, has high casting precision, precise size control, can eliminate casting processing allowance, reduce machining costs, have high casting surface finish, reduce grinding and cleaning time, and have good repeatability. Through "one box of multiple molds", batch production can be achieved, the yield rate can be improved, the manufacturing cycle can be shortened, and the production cost can be reduced.

[0089] The B outer roller sleeve block of the utility model is composed of a highly wear-resistant metal ceramic preform and a wear-resistant alloy, and has dual wear resistance and the toughness of metal materials;

[0090] The metal ceramic preform of the utility model is arranged in a strip-shaped mosaic, and the preform is slightly higher than the wear-resistant alloy substrate. When the wear occurs during operation, different wear-resistant materials on the surface form a height difference, which helps to improve the grinding efficiency.

[0091] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new type of combined vertical mill roller sleeve, characterized in that: It comprises a roller body base (101), an outer roller sleeve block (102) and a pressure ring block (103); the rear section outer surface of the roller body base (101) has a wear-resistant structure, a plurality of outer roller sleeve blocks (102) are respectively located on the front section outer surface (1.3) of the roller body base (101), and a plurality of outer roller sleeve blocks (102) are spliced ​​to form a circular outer roller sleeve, a plurality of pressure ring blocks (103) are wedge-shaped spliced ​​with the circular outer roller sleeve, and the pressure ring block (103) is connected to the roller body base (101) via a fastener; The outer roller sleeve block (102) comprises an A outer roller sleeve block (102-1) and a B outer roller sleeve block (102-2); A second wear-resistant layer (4) is provided on the outer surface of the outer roller sleeve block (102-1); The outer roller sleeve block B (102-2) comprises an outer roller sleeve base body, a front section of the outer surface of the outer roller sleeve base body is provided with a plurality of first grooves (120) arranged at intervals, a rear section of the outer surface of the outer roller sleeve base body is provided with a plurality of second grooves (121) arranged at intervals, a first wear-resistant preform (5) is embedded in the first groove (120), and a second wear-resistant preform (6) is embedded in the second groove (121).

2. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The first wear-resistant preform (5) and the second wear-resistant preform (6) are both higher than the outer roller sleeve base.

3. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The middle section of the roller body base (101) is provided with a circle of middle section step bottom plane (1.4), the middle section step bottom plane (1.4) is located between the front section outer surface (1.3) and the rear section outer surface of the roller body base (101), and a circle of middle section step bottom plane clamping grooves (1.9) are also provided on the middle section step bottom plane (1.4); A first V-shaped protrusion at the bottom of the rear section of the outer roller sleeve block (102-1) is wedge-engaged with a plane groove (1.9) at the bottom of the middle step; B a second V-shaped protrusion at the bottom of the rear section of the outer roller sleeve block (102-2) is wedge-engaged with a plane groove (1.9) at the bottom of the middle step.

4. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The wear-resistant structure on the roller body base (101) is a first wear-resistant layer (3); the outer surface of the rear section of the roller body base (101) comprises a first conical surface (1.1) and a second conical surface (1.2); the first conical surface (1.1) and the second conical surface (1.2) constitute a two-stage variable conical surface; the outer surfaces of the first conical surface (1.1) and the second conical surface (1.2) are welded with the first wear-resistant layer (3); the front end of the first wear-resistant layer (3) is flush with the bottom plane (1.4) of the middle step; the rear end of the first wear-resistant layer (3) is flush with the rear end of the roller body base (101), and the transition is smooth.

5. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The outer surface front section of the A outer roller sleeve block (102-1) is an A flange arc section (2.3), and the outer surface rear section is an A conical surface section (2.2). The A flange arc section (2.3) and the A conical surface section (2.2) are welded with a second wear-resistant layer (4). The second wear-resistant layer (4) is flush with the first wear-resistant layer (3) on the roller body base (101), and the tail end of the second wear-resistant layer (4) is flush with the A rear section step surface (2.4) of the A outer roller sleeve block (102-1).

6. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The A front section inner surface (2.9) and the A outer surface (2.11) of the A outer roller sleeve block (102-1) form a V-shaped wedge-shaped conical surface. The A front section inner surface (2.9) and the A outer surface (2.11) of the A outer roller sleeve block (102-1) are in contact with the pressure ring inner surface (4.2) and the pressure ring outer surface (4.3) of the pressure ring block (103). The rear section bottom of the A outer roller sleeve block (102-1) is provided with a first V-shaped protrusion for wedge-shaped clamping with the middle section step bottom plane clamping groove (1.9) on the roller body base (101). The first V-shaped protrusion includes the A inner surface (2.1), the A outer surface (2.11) and the A inner surface (2.2). A rear bottom plane (2.6) and an A wedge-shaped cone surface (2.5), a plurality of groups of A square grooves (2.12) are arranged on the A inner surface (2.1) of the A outer roller sleeve block (102-1), a first A semi-U-shaped notch (2.7) is opened on the inner surface of the A end (2.10) on one side of the A outer roller sleeve block (102-1), and a second A semi-U-shaped notch (2.8) is opened on the inner surface of the A end (2.10) on the other side, and after two adjacent A outer roller sleeve blocks (102-1) are combined, the first A semi-U-shaped notch (2.7) and the second A semi-U-shaped notch (2.8) form a first U-shaped notch; A plurality of pin holes (1.5) are evenly distributed in the circumferential direction of the front section outer surface (1.3) of the roller body base (101); cylindrical pins (104) are embedded in the pin holes (1.5) and the first U-shaped notch; the inner diameter of the first U-shaped notch is larger than the outer diameter of the cylindrical pin (104); and a gasket (107) for sealing is also filled between the first U-shaped notch and the middle section step bottom plane slot (1.9) on the roller body base (101).

7. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: In the B outer roller sleeve block (102-2), the outer surface front section of the outer roller sleeve base body is a B flange arc section (3.3), the B flange arc section (3.3) is provided with a plurality of first grooves (120) arranged at intervals, and one end of the first groove (120) has an arc, the outer surface rear section of the outer roller sleeve base body is a B cone section (3.2), the B cone section (3.2) is provided with a plurality of second grooves (121) arranged at intervals, and one side of the second groove (121) has serrations, and the first grooves (120) and the second grooves (121) located in the same row are connected; the rear end of the second wear-resistant preform (6) in the second groove (121) is flush with the B rear section step surface (3.4) of the outer roller sleeve base body.

8. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The front section inner surface (3.9) and the outer surface (3.11) of the B outer roller sleeve block (102-2) form a V-shaped wedge-shaped conical surface. The front section inner surface (3.9) and the outer surface (3.11) of the B outer roller sleeve block (102-2) are in contact with the inner surface (4.2) and the outer surface (4.3) of the pressure ring block (103). The rear section bottom of the B outer roller sleeve block (102-2) is provided with a second V-shaped protrusion for wedge-shaped engagement with the middle section step bottom plane groove (1.9) on the roller body base (101). The second V-shaped protrusion includes the inner surface (3.1), the B outer surface (3.11) and the inner surface (4.2) of the B outer roller sleeve block (102-2). The rear section bottom plane (3.6) and the B wedge-shaped cone surface (3.5), the B inner surface (3.1) of the B outer roller sleeve block (102-2) is provided with a plurality of groups of B square grooves (3.12), the inner surface of the B end (3.10) on one side of the B outer roller sleeve block (102-2) is provided with a first B semi-U-shaped notch (3.7), and the inner surface of the B end (3.10) on the other side is provided with a second B semi-U-shaped notch (3.8), and after two adjacent B outer roller sleeve blocks (102-2) are combined, the first B semi-U-shaped notch (3.7) and the second B semi-U-shaped notch (3.8) form a second U-shaped notch; A plurality of pin holes (1.5) are evenly distributed in the circumferential direction of the front section outer surface (1.3) of the roller body base (101); cylindrical pins (104) are embedded in the pin holes (1.5) and the second U-shaped notch; the inner diameter of the second U-shaped notch is larger than the outer diameter of the cylindrical pin (104); and a gasket (107) for sealing is filled between the second U-shaped notch and the middle section step bottom plane slot (1.9) on the roller body base (101).

9. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The A outer roller sleeve block (102-1) is formed by surfacing, and the A outer roller sleeve block (102-1) is made of cast steel; the first wear-resistant preform (5) and the second wear-resistant preform (6) are both made of metal ceramic preforms, and the outer roller sleeve matrix is ​​made of high-chromium cast iron.

10. The novel combined vertical mill roller sleeve according to claim 1 is characterized in that: The pitch circle of the front step end surface (1.6) of the roller body base (101) is also provided with a plurality of roller body threaded holes (1.7) and positioning pin holes (1.8) for connecting with the pressure ring block (103); the inner surface (4.1) of the pressure ring block (103) is in contact with the step inner surface (1.10) of the roller body base (101); and the pitch circle of the top plane (4.5) of the pressure ring block (103) is provided with a plurality of roller body threaded holes (1.7) and positioning pin holes (1.8) for connecting with the pressure ring block (103). ) is connected to the roller threaded hole (1.7) on the roller base (101), a plurality of positioning pin holes (4.8) for connecting to the positioning pin holes (1.8) on the roller base (101) through positioning pins (106) are arranged on the pitch circle of the top plane (4.5) of the pressure ring block (103), and the pressure ring inner surface (4.2) and the pressure ring outer surface (4.3) of the pressure ring block (103) form a V-shaped wedge-shaped cone surface.

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