A modular segmented roller structure and method for high-pressure roller mills

Abstract

This invention discloses a modular segmented roller structure and method for high-pressure roller mills, belonging to the technical field of roller pressing equipment. The structure includes a roller shaft, multiple segmented roller bodies, and a connecting structure. Multiple mating bodies (I) are circumferentially distributed on the surface of the roller shaft, and mating bodies (II) are installed on the inner wall of the segmented roller bodies, with the two fitted together in a wedge-shaped fit. The connecting structure is located at both ends or between the roller shaft and the segmented roller bodies. This invention achieves rapid positioning and disassembly / reassembly of the segmented roller bodies through a wedge-shaped fit. The design with a 0-30° cone angle and a 0.05-0.15mm gap ensures connection strength and interchangeability. Optional hydraulic disassembly chambers or ejector pin structures further enhance disassembly convenience. This invention enables modular replacement of the segmented roller bodies without disassembling peripheral components such as reducers and bearings, significantly reducing maintenance intensity and downtime, and improving equipment uptime and operational economy.

Description

Technical Field

[0001] This invention belongs to the field of roller pressing equipment technology, specifically a modular segmented roller structure and method for high-pressure roller mills. Background Technology

[0002] High-pressure roller mills are efficient and energy-saving grinding equipment based on the principle of bed grinding. Currently, high-pressure roller mills are widely used in mining, cement, metallurgy, building materials, chemical and other industrial fields. A high-pressure roller mill consists of two opposing, synchronously rotating extrusion rollers, one fixed and one movable. Material is fed from above the rollers and continuously drawn into the gap between them by the extrusion rollers. Under pressure of approximately 100–300 MPa, it is formed into a dense cake and discharged.

[0003] The extrusion roll mainly consists of two parts: the roll shaft (roller core) and the roll sleeve (roller skin). The roll sleeve is located on the outer circumference of the roll shaft and is a key component that directly bears the impact of crushing and wear. It is subjected to high pressure, abrasive wear, and impact loads over a long period of time and is considered a wear part. Traditional roll sleeves mostly adopt an integral structure, which is fixed to the roll shaft by means of interference fit and heat fitting. To solve the above problems, the industry has begun to gradually adopt segmented roll sleeves. However, the existing structure generally has defects such as low connection strength, poor positioning accuracy, easy loosening during operation, and the need for a lot of auxiliary disassembly for assembly and disassembly, which restricts the equipment's operating rate and maintenance economy. Summary of the Invention

[0004] This invention addresses the technical challenges of insufficient connection strength and complex disassembly and assembly procedures in existing segmented roller sleeves by proposing a modular segmented roller body structure for high-pressure roller mills, combined with a hydraulically assisted rapid disassembly and assembly method.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A modular segmented roller structure for a high-pressure roller mill includes:

[0007] The roller shaft has multiple mating bodies distributed circumferentially on its surface.

[0008] Multiple segmented roller bodies are circumferentially distributed on the outside of the roller shaft. A second mating body is installed on the inner wall of the segmented roller body. The first mating body and the second mating body are installed in a wedge-shaped fit.

[0009] A connecting structure is provided at both ends or between the connecting roller shaft and the segmented roller body, for connecting the roller shaft and the segmented roller body.

[0010] In the modular segmented roller body structure for the high-pressure roller mill, the first mating body is an axial boss, and a wedge-shaped groove is formed between two adjacent axial bosses.

[0011] The second mating body is an axial protrusion that fits into a wedge-shaped groove.

[0012] In the modular segmented roller structure for the high-pressure roller mill, the width of the wedge groove gradually decreases along the depth direction, and the bottom surface of the wedge groove is an arc-shaped surface, a polygonal surface, or a plane.

[0013] The width of the axial protrusion gradually decreases along the side away from the split roller, and the bottom surface of the axial protrusion is an arc-shaped surface, a polygonal surface, or a plane.

[0014] In the modular segmented roller structure for the high-pressure roller mill, the cone angles on both sides of the first and second mating bodies are both 0-30°, and the mating clearance between each mating surface of the first and second mating bodies is 0.05-0.15mm.

[0015] In the modular segmented roller structure for the high-pressure roller mill, at least one surface of the wedge groove is provided with a disassembly oil cavity, and the end face of the roller shaft is provided with a connecting hole, which communicates with the disassembly oil cavity.

[0016] In the modular segmented roller body structure for the high-pressure roller mill, an installation chamber is provided at the bottom of the wedge groove, a piston is movably installed in the installation chamber, a settling groove is provided at the opening of the installation chamber and a sealing plate is installed, multiple ejector pins are installed on the side of the piston facing the segmented roller body, a through hole is provided on the sealing plate for the ejector pins to pass through, a return spring is installed on the outside of the ejector pin, the return spring is arranged between the sealing plate and the piston, and a position hole corresponding to and compatible with the position of the ejector pin is provided at the bottom of the mating body two.

[0017] The roller has a connecting hole that connects to the internal space of the installation chamber.

[0018] In the modular segmented roller structure for the high-pressure roller mill, the second mating body and the segmented roller body are detachably installed, and a connecting column is installed on the sealing plate or roller shaft. The connecting structure is set on the side of the second mating body facing the connecting column and is adapted to the connecting column.

[0019] In the modular split roller body structure for the high-pressure roller mill, the connecting structure includes an installation hole on the side of the mating body facing the connecting column, and a constraint plate is installed at the opening of the hole. A movable sleeve and a gasket and a spring are installed inside the installation hole. The spring is distributed between the gasket and the constraint plate. A constraint plate is provided at the root of the movable sleeve. The gasket is distributed between the constraint plate and the spring.

[0020] A second elastic top pin is radially installed on the constraint plate, and a first spiral groove is provided axially in the mounting hole. The depth of the first spiral groove near the connecting column is greater than the depth of the side away from the connecting column. The first spiral groove and the second elastic top pin are in sliding fit.

[0021] The inner wall of the movable sleeve is provided with a spiral groove 2 and the root of the spiral groove 2 is provided with an circumferential groove. The side of the connecting column is equipped with an elastic top pin 1, which slides in the spiral groove 2 and the circumferential groove.

[0022] In the modular segmented roller body structure for the high-pressure roller mill, the connection structure includes end-face fan-shaped flanges arranged on both sides of the roller shaft and the segmented roller body. The end face of the segmented roller body is provided with an inwardly concave stepped surface one, and the inner end face of the end-face fan-shaped flange is provided with an outwardly convex stepped surface two. The stepped surface one and the stepped surface two are mutually compatible.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In this invention, the circumferential positioning, shear load transfer, and rapid assembly / disassembly of the segmented roller sleeve are achieved through the connection interface between the wedge key of the segmented roller sleeve module and the wedge keyway of the roller shaft. The design of this connection interface directly affects the overall strength, rigidity, and service life of the roller sleeve. The design control requirements for the connection interface between the wedge-shaped mating body of the segmented roller and the wedge keyway of the roller shaft are as follows: the cone angles on both sides of the wedge key of the segmented roller sleeve module and the wedge keyway of the roller shaft are controlled within the range of 0-30°; the mating clearance of each mating surface of the wedge key and the wedge keyway is within the range of 0.05-0.15mm, facilitating the replacement of individual segmented roller bodies.

[0025] 2. This invention injects high-pressure oil into the disassembly oil passage of the segmented roller body set on the roller shaft using a manual or electric hydraulic oil pump. The high pressure pushes the segmented roller body out of the wedge-shaped keyway of the roller shaft. Each segmented roller body can be removed from the roller shaft one by one in a modular manner and replaced, which can realize a partial replacement mode or an overall online rapid replacement mode.

[0026] 3. Through the synergistic effect of the modular segmented roller structure and the hydraulic disassembly and assembly method, this invention can significantly reduce the labor intensity and workload of roller sleeve replacement operations, significantly improve the operating rate of high-pressure roller mill equipment, and reduce the operation and maintenance costs of the equipment.

[0027] 4. This invention uses a connecting structure to fix the roller shaft and the segmented roller body from the end face. A fan-shaped plate, resembling a limit-positioning and interlocking end-face flange, is provided on both sides of the roller shaft body and the segmented roller sleeve. Its function is to limit and constrain each segmented roller sleeve module in the axial direction, preventing axial movement. Simultaneously, the end-face flange module, through bolt assemblies, securely connects the end of the roller shaft body to the end of the segmented roller sleeve, reliably locking and fixing the segmented roller sleeve onto the roller shaft. The number of fan-shaped plate modules on the end-face flange is the same as the number of segmented roller sleeve modules. The bolts are preferably high-strength alloy steel bolts with a strength grade of 10.9 or higher. A special anti-loosening washer or anti-loosening thread structure is provided at the bolt holes.

[0028] 5. This invention uses a connecting structure to fix the roller shaft and the segmented roller body, eliminating the need for assembly and installation of the end face sector flange, thus saving the operation of disassembling and assembling the end face sector flange. Furthermore, the connecting holes can be sealed with plugs. During disassembly, hydraulic pressure causes the ejector pin to move the segmented roller body outward, overcoming the action of the elastic ejector pin, thereby completing the separation of the roller shaft and the segmented roller body. Attached Figure Description

[0029] Figure 1 This is a cross-sectional view of the overall structure of the present invention. Figure 1 .

[0030] Figure 2 This is a side view of the overall structure of the present invention.

[0031] Figure 3 This is a side view of the split roller.

[0032] Figure 4 This is the front view of the split roller body.

[0033] Figure 5 This is the front view of the roller.

[0034] Figure 6 This is a side view of the roller.

[0035] Figure 7 This is a cross-sectional view of the overall structure of the present invention. Figure 2 .

[0036] Figure 8 for Figure 7 A magnified view of a portion of point A in the middle.

[0037] Figure 9 This is a cross-sectional view of the overall structure of the present invention. Figure 3 .

[0038] Figure 10 for Figure 9 A magnified view of a section at point B.

[0039] Figure 11 This is a cross-sectional view of the connecting column.

[0040] Figure 12 This is a schematic diagram of the structure of the movable sleeve.

[0041] Figure 13 This is a cross-sectional view of the movable sleeve.

[0042] Figure 14 This is a cross-sectional view of the mounting holes.

[0043] In the diagram: 1. Roller shaft; 2. Split roller body; 3. Part 1; 4. Part 2; 5. Wedge groove; 6. Disassembly oil chamber; 7. Connecting hole; 8. Mounting chamber; 9. Piston; 10. Sinking groove; 11. Sealing plate; 12. Ejector pin; 13. Through-hole; 14. Return spring; 15. Position hole; 16. Connecting column; 17. Mounting hole; 18. Constraint plate; 19. Movable sleeve; 20. Gasket; 21. Spring; 22. Constraint disc; 23. Elastic top pin 1; 24. Spiral groove 1; 26. Spiral groove 2; 27. Circumferential groove; 28. Elastic top pin 2; 29. ​​End face fan-shaped flange. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0046] Example 1

[0047] like Figures 1 to 6 As shown, a modular segmented roller structure for a high-pressure roller mill includes:

[0048] Roller 1, with multiple assemblies 3 distributed circumferentially on the surface of roller 1;

[0049] Multiple segmented roller bodies 2 are circumferentially distributed on the outside of roller shaft 1. A mating body 4 is installed on the inner wall of the segmented roller body 2. The mating body 3 and the mating body 4 are installed in a wedge-shaped fit.

[0050] A connecting structure for connecting roller shaft 1 and segmented roller body 2.

[0051] The assemblies 3 are axial bosses, and wedge-shaped grooves 5 are formed between two adjacent axial bosses.

[0052] The second mating body 4 is an axial protrusion, which fits into the wedge-shaped groove 5.

[0053] The width of the wedge groove 5 gradually decreases along the depth direction, and the bottom surface of the wedge groove 5 is an arc-shaped surface, a polygonal surface, or a plane.

[0054] The width of the axial protrusion gradually decreases along the side away from the split roller body 2, and the bottom surface of the axial protrusion is an arc-shaped surface, a polygonal surface, or a plane.

[0055] The cone angles on both sides of the first mate 3 and the second mate 4 are both 0-30°, and the mating gap between each mating surface of the first mate 3 and the second mate 4 is 0.05-0.15mm.

[0056] At least one surface of the wedge groove 5 is provided with a disassembly oil cavity 6, and the end face of the roller 1 is provided with a connecting hole 7, which communicates with the disassembly oil cavity 6.

[0057] The connection structure includes end-face fan-shaped flanges 29 arranged on both ends of the roller shaft 1 and the segmented roller body 2. The end face of the segmented roller body 2 is provided with a concave stepped surface one, and the inner end face of the end-face fan-shaped flange 29 is provided with a convex stepped surface two. The stepped surface one and the stepped surface two are adapted to each other to achieve a tight fit with the end-face fan-shaped flange 29, and the torque is transmitted by the friction of the stepped mating surface.

[0058] During installation, the mating parts 4 of each segmented roller body 1 are placed around the roller shaft 1 in the pre-set wedge grooves 5 between two adjacent mating parts 3 on the roller body of the roller shaft 1. The segmented roller body 2 is positioned by the mating parts 4 of the segmented roller body 2 and the mating parts 3 of the roller shaft 1 in the wedge grooves. Then, the segmented roller body 2 is fixed to the roller shaft 1 by the fastening bolts provided on the end face fan-shaped flange 29. Each segmented roller body 2 finally forms a complete annular cylinder.

[0059] During disassembly, first loosen the bolts on the end face sector flange 29, remove the end face sector flanges 29 on both sides of the segmented roller body 2, and then connect the high-pressure oil pipe equipped with the hydraulic device to the connection hole 7 of the multiple disassembly-specific oil chambers 6 set on the roller shaft 1. Use the high-pressure oil injected by the hydraulic device to separate the mating body 4 of the segmented roller body 2 from the wedge groove 5 that fits on the roller shaft 1. Each segmented roller body 2 can then be removed from the surface of the roller shaft 1 one by one to replace the worn segmented roller body 2 without disassembling or assembling peripheral components such as reducers and bearings.

[0060] The segmented roller body 2 is made of alloy steel through casting or forging and precision machining, possessing high strength and high toughness, and capable of withstanding the enormous pressure and impact generated during roller mill operation. The radial thickness and axial length of the segmented roller body 2 are coordinated with the mating dimensions of the roller shaft 1.

[0061] The segmented roller body 2 and the roller shaft 1 are connected by a wedge-shaped keyway, which facilitates precise positioning and quick disassembly during assembly. At the same time, the torque is transmitted by the conical surface friction and the wedge locking force.

[0062] Roller 1 is forged from alloy steel and then precision machined, possessing high strength and toughness, capable of withstanding the enormous pressure and impact generated during roller mill operation. The radial dimensions and axial length of the shaft body are coordinated with the mating dimensions of the segmented roller body 2.

[0063] The two end faces of the roller shaft body 1 are provided with mating surfaces that are adapted to the end face fan-shaped flange 29, so as to achieve a tight fit with the end face fan-shaped flange 29, and transmit torque by the friction of the mating surfaces.

[0064] By using a wedge-shaped keyway as the connection interface between the segmented roller body 2 and the roller shaft 1, the circumferential positioning of the segmented roller shaft 1, the transmission of shear loads, and the quick assembly and disassembly are achieved. The design of the connection interface directly affects the overall strength, rigidity, and service life of the segmented roller body 2.

[0065] The disassembly and assembly steps are as follows:

[0066] 1) Disassembly methods and steps

[0067] ① Disassembly preparation: Stop the high-pressure roller mill and disconnect the power. Keep the moving roller and the fixed roller in a proper static state (do not remove the speed reducer or bearings, etc.). Clean the dust and debris from the end face of the roller shaft 1 and the outer surface of each segmented roller body 2.

[0068] ② Remove the end face sector flange 29: Use a torque wrench to loosen all the bolts on the worn end face sector flange 29 at both ends of the segmented roller body 2, and remove the end face sector flange 29.

[0069] ③ Hydraulic release: Connect the professional hydraulic tool to the dedicated disassembly connection holes 7 at both ends of the shaft body, inject high-pressure oil into the disassembly oil chamber 6 of the wedge groove 5 of the roller shaft 1 (the pressure of the selected hydraulic tool should generally reach more than 25Mpa), push the wedge mating surface (matting body 3) of the segmented roller body 2 through the wedge keyway surface of the shaft body, so that the segmented roller body 2 moves outward, and releases the wedge lock between the segmented roller body 2 and the shaft body of the roller shaft 1.

[0070] ④ Remove the worn segmented roller body 2: After a gap is formed between the worn segmented roller body 2 and the surface of the roller shaft 1, use a special lifting tool (such as a lifting ring or sling) to remove the single worn segmented roller body 2 radially from the roller shaft 1 and remove it to the outside of the high pressure roller mill body.

[0071] ⑤ Cyclic processing: Repeat the above disassembly process for all worn segmented roller bodies 2 that need to be replaced until all worn segmented roller bodies 2 that need to be disassembled are completely removed.

[0072] 2) Installation methods and steps

[0073] ①Prepare new segmented roller body 2: Based on the wear condition of the equipment, prepare the required new segmented roller body 2 in advance at the factory or warehouse. The size and curvature of the new segmented roller body 2 are precision machined and should be compatible with the mating surface of the roller shaft 1.

[0074] ② Surface cleaning and inspection of roller 1: Carefully clean and check the alignment of the outer circular surface of the roller 1 shaft body to be installed with the new module, remove oil stains, rust and attachments, and confirm that the outer surface of the wedge groove 5 that fixes the wedge key is undamaged.

[0075] ③ Place and install the new segmented roller body 2: Use a hoisting tool to align the new segmented roller body 2 with the predetermined position of the wedge groove 5 on the shaft of the roller 1, and gently place it so that the segmented roller body 2 contacts and fits into the wedge groove 5 of the roller 1.

[0076] ④ Fixing and locking the new segmented roller body 2: Install the end face fan-shaped flange 29 on both sides of the new segmented roller body 2. Install the anti-loosening washers and bolts and use a wrench to initially tighten the bolts. Finally, use a professional torque wrench to tighten the bolts of the end face fan-shaped flange 29 to the bolt pre-tightening torque.

[0077] ⑤ Install all modules in sequence: Assemble and fix the remaining new segmented rollers 2 on the circumference onto the roller shaft 1 one by one using the same method as above.

[0078] ⑥ Comprehensive inspection and trial run: After all the segmented roller bodies 2 are installed and locked, check whether the end fan-shaped flanges 29 and all bolts are secure. Manually rotate the extrusion rollers to ensure that there is no abnormal noise or interference during operation. Then, start a trial run for 1 hour, stop the machine to check and confirm that the segmented roller bodies 2 are self-locking and stable, and then resume normal production.

[0079] Example 2

[0080] Unlike Example 1, as follows: Figure 7 and 8 As shown, to avoid oil contamination, the segmented roller body 2 is not disassembled directly by disassembling the oil chamber 6. Specifically:

[0081] The bottom of the wedge-shaped groove 5 is provided with an installation chamber 8, and a piston 9 is movably installed in the installation chamber 8. A sink 10 is provided at the opening of the installation chamber 8 and a sealing plate 11 is installed. Multiple ejector pins 12 are installed on the side of the piston 9 facing the split roller body 2. A through hole 13 is provided on the sealing plate 11 for the ejector pins 12 to pass through. A return spring 14 is installed on the outside of the ejector pin 12. The return spring 14 is arranged between the sealing plate 11 and the piston 9. The bottom of the mating body 2 4 is provided with a position hole 15 that corresponds to and is compatible with the position of the ejector pin 12.

[0082] The roller 1 has a connecting hole 7 that connects to the internal space of the mounting chamber 8.

[0083] Connect the specialized hydraulic tooling to the dedicated connection holes at both ends of the shaft for disassembly. By moving the piston 9 and the ejector pin 12 on it outward, the mating body 2 4 is removed from the wedge groove 5.

[0084] Example 3

[0085] Based on Example 2, and unlike Example 1, the connecting structure is set between the roller shaft 1 and the split roller body 2, and the disassembly and assembly operations are completed in conjunction with the oil-free overflow operation method of Example 2:

[0086] like Figures 9 to 14 As shown, the second mating body 4 and the segmented roller body 2 are detachably installed. The second mating body 4 can be reused, and a connecting column 16 is installed on the sealing plate 11 or the roller shaft 1. The connecting structure is set on the side of the second mating body 4 facing the connecting column 16 and is adapted to the connecting column 16.

[0087] The connection structure includes a mounting hole 17 opened on the side of the mating body 2 4 facing the connecting post 16, and a constraint plate 18 is installed at the opening of the hole. A movable sleeve 19 and a gasket 20 and a spring 21 are installed in the mounting hole 17 and fitted on the outside of the movable sleeve 19. The spring 21 is distributed between the gasket 20 and the constraint plate 18. A constraint plate 22 is provided at the root of the movable sleeve 19, and the gasket 20 is distributed between the constraint plate 22 and the spring 21.

[0088] A second elastic top pin 28 is radially installed on the constraint plate 22. A spiral groove 24 is provided axially in the mounting hole 17. The depth of the spiral groove 24 on the side closer to the connecting column 16 is greater than the depth on the side farther from the connecting column 16. The spiral groove 24 and the second elastic top pin 28 are in sliding fit.

[0089] The inner wall of the movable sleeve 19 is provided with a spiral groove 26 and the root of the spiral groove 26 is provided with an annular groove 27. The side of the connecting column 16 is equipped with an elastic top pin 23, which slides in the spiral groove 26 and the annular groove 27.

[0090] During installation, by aligning the connecting column 16 and the movable sleeve 19, the mating body 2 4 is installed along the axial direction of the connecting column 16. The elastic top pin 23 will move along the spiral groove 26 until it enters the circumferential groove 27 and moves away from the spiral groove 26, so that the connecting column 16 and the mating body 2 4 are fitted together and installed. When the split roller body 2 is running, it will not tend to separate from the roller shaft 1.

[0091] During disassembly, a specialized hydraulic tool is connected to the dedicated disassembly connection holes at both ends of the shaft. The piston 9 and the ejector pin 12 on it move outward to separate the mating body 2 4 from the wedge groove 5. After the mating body 2 4 and the wedge groove 5 are separated, the elastic ejector pin 23 is in the circumferential groove 27, and the movable sleeve 19 and the connecting column 16 are in an axially stationary state. As the force exerted by the ejector pin 12 on the split roller body 2 continues to increase, the elastic ejector pin 28 on the movable sleeve 19 will move along the spiral groove 24 and continue to compress inward, rotating the adapter sleeve 25 by a certain angle, so that the elastic ejector pin 23 moves into the spiral groove 26. Then the spring 21 performs a reset action. After the connecting column 16 and the movable sleeve 19 are separated, the movable sleeve 19 will be reset under the action of the elastic ejector pin 28.

[0092] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made to the technical solutions and inventive concepts of the present invention should all be covered within the scope of protection of the present invention.

Claims

1. A modular split roller body structure for a high pressure roller mill, characterized in that, include: Roller (1), with multiple assemblies (3) distributed circumferentially on the surface of roller (1); Multiple segmented roller bodies (2) are circumferentially distributed on the outside of the roller shaft (1). A matching body two (4) is installed on the inner wall of the segmented roller body (2). The matching body one (3) and the matching body two (4) are installed in a wedge-shaped fit. A connecting structure is provided at both ends or between the connecting roller shaft (1) and the segmented roller body (2) for connecting the roller shaft (1) and the segmented roller body (2).

2. The modular segmented roller structure for a high-pressure roller mill according to claim 1, characterized in that, The first assembly (3) is an axial boss, and a wedge-shaped groove (5) is formed between two adjacent axial bosses. The second fitting body (4) is an axial protrusion, which fits into the wedge groove (5).

3. The modular segmented roller structure for a high-pressure roller mill according to claim 2, characterized in that, The width of the wedge groove (5) gradually decreases along the depth direction, and the bottom surface of the wedge groove (5) is an arc surface, a polygonal surface or a plane; The width of the axial protrusion gradually decreases along the side away from the split roller (2), and the bottom surface of the axial protrusion is an arc-shaped surface, a polygonal surface, or a plane.

4. The modular segmented roller body structure for a high-pressure roller mill according to claim 3, characterized in that, The cone angles on both sides of the first mate (3) and the second mate (4) are 0-30°, and the mating gaps of each mating surface of the first mate (3) and the second mate (4) are 0.05-0.15mm.

5. A modular segmented roller body structure for a high-pressure roller mill according to claim 3, characterized in that, The wedge groove (5) has a disassembly oil cavity (6) on at least one side, and the end face of the roller (1) has a connection hole (7) that communicates with the disassembly oil cavity (6).

6. The modular segmented roller structure for a high-pressure roller mill according to claim 3, characterized in that, The bottom of the wedge groove (5) is provided with an installation chamber (8), and a piston (9) is movably installed in the installation chamber (8). A sinker (10) is provided at the opening of the installation chamber (8) and a sealing plate (11) is installed. Multiple ejector pins (12) are installed on the side of the piston (9) facing the split roller body (2). A through hole (13) for the ejector pins (12) to pass through is provided on the sealing plate (11). A return spring (14) is installed on the outside of the ejector pin (12). The return spring (14) is arranged between the sealing plate (11) and the piston (9). The bottom of the mating body two (4) is provided with a position hole (15) that corresponds to and is compatible with the position of the ejector pin (12). The roller (1) has a connecting hole (7) and the internal space of the installation chamber (8) are connected.

7. A modular segmented roller body structure for a high-pressure roller mill according to claim 6, characterized in that, The second mating body (4) and the split roller body (2) are detachably installed, and a connecting column (16) is installed on the sealing plate (11) or the roller shaft (1). The connecting structure is set on the side of the second mating body (4) facing the connecting column (16) and is adapted to the connecting column (16).

8. A modular segmented roller body structure for a high-pressure roller mill according to claim 7, characterized in that, The connection structure includes a mounting hole (17) on the side of the mating body (4) facing the connecting column (16), and a constraint plate (18) is installed at the opening of the hole. A movable sleeve (19) and a gasket (20) and a spring (21) are installed in the mounting hole (17). The spring (21) is distributed between the gasket (20) and the constraint plate (18). A constraint plate (22) is provided at the root of the movable sleeve (19). The gasket (20) is distributed between the constraint plate (22) and the spring (21). A second elastic top pin (28) is radially installed on the constraint plate (22), and a first spiral groove (24) is provided axially in the mounting hole (17). The depth of the first spiral groove (24) near the connecting column (16) is greater than the depth of the side away from the connecting column (16). The first spiral groove (24) and the second elastic top pin (28) are in sliding fit. The inner wall of the movable sleeve (19) is provided with a spiral groove two (26) and the root of the spiral groove two (26) is provided with an annular groove (27). The side of the connecting column (16) is equipped with an elastic top pin one (23), which slides in the spiral groove two (26) and the annular groove (27).

9. A modular segmented roller body structure for a high-pressure roller mill according to claim 1, characterized in that, The connection structure includes end face fan-shaped flanges (29) arranged on both sides of the roller shaft (1) and the segmented roller body (2). The end face of the segmented roller body (2) is provided with an inwardly concave stepped surface one, and the inner end face of the end face fan-shaped flange (29) is provided with an outwardly convex stepped surface two. The stepped surface one and the stepped surface two are adapted to each other.

10. A method for disassembling and assembling a modular segmented roller structure for a high-pressure roller mill, characterized in that, The steps are as follows: 1) Disassembly methods and steps ① Disassembly preparation: Stop the high pressure roller mill and disconnect the power. Keep the moving roller and the fixed roller in a proper static state. Clean the dust and debris from the end face of the roller shaft (1) and the outer surface of each segmented roller body (2). ② Remove the end face sector flange (29): Use a torque wrench to loosen all the bolts on the end face sector flange (29) at both ends of the worn segmented roller body (2) and remove the end face sector flange (29). ③ Hydraulic release: Connect the professional hydraulic tool to the special connection holes (7) at both ends of the shaft body for disassembly, inject high pressure oil into the disassembly oil chamber (6) of the wedge groove (5) of the roller shaft (1), push the wedge mating surface of the split roller body 2, so that the split roller body (2) moves outward and releases the wedge lock between the split roller body (2) and the shaft body of the roller shaft (1); ④ Remove the worn segmented roller body (2): When a gap is formed between the worn segmented roller body (2) and the surface of the roller shaft (1), use a special lifting tool to remove the single worn segmented roller body (2) radially from the roller shaft (1) and remove it to the outside of the high pressure roller mill body; ⑤ Cyclic processing: Repeat the above disassembly operation for all worn segmented roller bodies (2) that need to be replaced until all worn segmented roller bodies (2) that need to be disassembled are completely removed; 2) Installation methods and steps ①Prepare new split roller body (2): Based on the wear condition of the equipment, prepare the required new split roller body (2) in advance in the factory or warehouse. The size and curvature of the new split roller body (2) are precisely machined to match the shaft body mating surface of the roller shaft (1); ② Surface cleaning and inspection of roller (1): Clean the outer surface of the roller (1) to be installed with the new module, and confirm that the outer surface of the wedge groove (5) is not damaged; ③ Place and install the new segmented roller body (2): Use a hoisting tool to align the new segmented roller body (2) with the predetermined position of the wedge groove (5) on the shaft of the roller shaft (1), and gently place it so that the segmented roller body (2) contacts and fits with the wedge groove (5) of the roller shaft (1); ④ Fixing and locking the new segmented roller body (2): Install the end face fan-shaped flange (29) on both sides of the new segmented roller body (2), install the anti-loosening washers and bolts on the assembly and use a wrench to initially tighten the bolts, and finally use a professional torque wrench to tighten the bolts of the end face fan-shaped flange (29) to the bolt pre-tightening torque. ⑤ Install all the petal roller bodies (2) in sequence: Assemble and fix the remaining new petal roller bodies (2) on the circumference one by one to the roller shaft (1) in the same way as above; ⑥ Comprehensive inspection and trial run: After all the segmented roller bodies (2) are installed and locked, check whether the end fan-shaped flange (29) and each bolt are secure. Manually rotate the extrusion roller to ensure that there is no abnormal noise or interference during operation. Then, start a trial run for 1 hour, stop the machine to check and confirm that the segmented roller body (2) is self-locking and stable, and then resume normal production.

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