CN117864998A

CN117864998A - Method for quickly replacing roller body of pellet high-pressure roller mill

Info

Publication number: CN117864998A
Application number: CN202410202667.3A
Authority: CN
Inventors: 张进坤; 高万里; 廉波; 程猛; 刘帅; 张作程; 时光; 李光华; 王超
Original assignee: SD Steel Rizhao Co Ltd
Current assignee: SD Steel Rizhao Co Ltd
Priority date: 2024-02-23
Filing date: 2024-02-23
Publication date: 2024-04-12

Abstract

The invention relates to the technical field of equipment management and maintenance of a high-pressure roller mill at a sintered pellet inlet, and particularly discloses a method for rapidly replacing a roller body of the high-pressure roller mill.

Description

Method for quickly replacing roller body of pellet high-pressure roller mill

Technical Field

The invention relates to the technical field of equipment management and maintenance of a high-pressure roller mill at a sintered pellet inlet, in particular to a method for quickly replacing a roller body of the high-pressure roller mill.

Background

The high-pressure roller mill is a special mineral crushing processing device for the latest generation of metallurgical industry, and can realize the treatments of ore fineness, station time and monomer dissociation degree under the condition of extremely low energy consumption and running cost. In addition, the method can also be used for finely grinding mineral powder, increasing the specific surface area of the iron concentrate, improving the quality of the pellets which are successfully formed into pellets, and the like.

The existing pellet area is purchased with GRINDER ROLLER UNIT high-pressure roller mill with original inlet of German Hongburg, the roller body is phi 1200mm x 800mm, the treatment capacity is 300t/h, the high-pressure roller mill mainly comprises a motor, a planetary reducer, a roller system, a frame, a torque support, a hydraulic system, a reducer lubrication system, a feeding device, a roller cover, a control system and the like, and two roller shafts of the high-pressure roller mill are respectively driven by the motor through a universal coupling and the planetary reducer.

The surface quality of the extrusion roller of the high-pressure roller mill determines the crushing quality, and the extrusion roller of the high-pressure roller mill can be removed and reinstalled in every 1-2 years.

The pellet high-pressure roller mill is limited by the layout structure and the overhaul space, the extrusion roller of the high-pressure roller mill has large volume, heavy weight and small overhaul platform, and the overhaul special tool is omitted, so that the overhaul workload of the conventional method is large, the working hours are long, and the operation difficulty and the unsafe performance are increased. Meanwhile, the high-pressure roller mill has complex protection facilities, and once damaged, the high-pressure roller mill cannot recover normal operation for a long time.

Therefore, a method for rapidly replacing the roller body of the pellet high-pressure roller mill is needed to be designed, so that the problems of complicated replacement procedure, long replacement time and low efficiency of the extrusion roller of the pellet inlet high-pressure roller mill in the prior art are solved.

Disclosure of Invention

Aiming at the problems existing in the prior art, the invention aims to provide a method for quickly replacing the roller body of a pellet high-pressure roller mill, and the method is convenient and practical, reduces repeated labor and reduces safety risks by independently designing and manufacturing special tools and tools to quickly detach and rotate the squeeze roller and the planetary reducer.

The technical scheme adopted for solving the technical problems is as follows: a method for quickly replacing a roller body of a pellet high-pressure roller mill comprises the following steps:

s1, preparing before construction, mounting an electric hoist and manufacturing a tool;

s2, handling the operation procedure, and confirming power failure and hanging of the high-pressure roller mill and the roller body belt;

s3, disassembling a rotary controller on the locking disc protecting cover, loosening a nut of the rotary controller, removing a washer and a proximity switch, and fixing the proximity switch on the roller press in place;

s4, detaching the top and side roller covers, removing mounting pieces on the high-pressure roller mill frame by using a lifting belt and matching with an electric hoist, detaching the door and the lower side plate, lifting the frame, and placing the frame in a designated safety area;

s5, disassembling the labyrinth seal central lubrication system, pulling the high-pressure hose out of the bearing seat, binding the high-pressure hose on the top of the frame, placing the high-pressure hose at a high position and carrying out dust-proof treatment, and clearly marking the hose and the pipeline before starting to disassemble so as to quickly be reconnected to the matched port during reassembly;

s6, disassembling the water cooling system;

s7, disassembling the connector, the universal shaft and the locking disc protecting cover, loosening the universal shaft protecting cover, connecting the hoisting belt with the hoisting device to the universal shaft protecting cover, hoisting the universal shaft protecting cover out by using the electric hoist, and lowering the universal shaft protecting cover at a safe place;

loosening and removing the lock disk housing mounting assembly, removing the spacer plate, sliding the preassembled assembly back onto the bearing housing, loosening the corresponding bolts, nuts and removing the upper housing assembly;

s8, disassembling the universal shaft and the coupler;

s9, disassembling the hydraulic expansion sleeve for connecting the high-pressure roller mill with the speed reducer;

s10, separating the speed reducer from the high-pressure roller mill, fixing the speed reducer body by using a special shoulder pole tool, taking out a torque supporting pin shaft of the speed reducer by using a large hammer, moving the speed reducer away from the high-pressure roller mill by using a gap between a hydraulic jack and the speed reducer body, gradually separating the speed reducer from a shaft, and falling down after a certain distance is separated;

s11, disassembling the side baffle and the feeding device;

s12, dismantling the upper frame, connecting an electric hoist with an upper frame piece and tensioning a hoisting belt, dismantling a protective cover, dismantling nuts and washers, dismantling mounting parts of the intermediate piece at the top and bottom of the frame, arranging electric hoist equipment at a proper position and connecting the hoisting belt to a connecting point on the frame part, loosening and removing bolts and washers, lifting the intermediate piece and hoisting to a proper position, and before loosening the nuts, connecting the frame part to hoisting equipment to prevent the frame part from falling;

s13, lifting the movable roller and the fixed roller by using a special tool for lifting the bearing seat;

s14, cleaning accumulated materials in the frame and the cavity, replacing a sliding plate of a bearing seat on the frame, checking damage of a key groove of a roller bearing seat, cleaning dirt, and checking whether the thrust bearing is good;

s15, carrying out reloading on the moving and fixed rollers of the high-pressure roller mill;

s16, recovering the upper frame, recovering the auxiliary support, reinstalling the external sliding key and the external protection device, installing the upper frame in the opposite direction according to the disassembly sequence, installing all side plates on the inner side of the frame, placing the protective cover on the bearing seat and fixing the protective cover in place by using a gasket and a bolt, connecting the grease collecting box to the frame by using an angle piece and fixing the grease collecting box by using the gasket and the bolt;

s17, returning the side baffle plate and the feeding device;

s18, hoisting the high-pressure roller mill reducer by using a special shoulder pole tool for reinstallation;

s19, expanding the hydraulic expansion sleeve by using a tool;

s20, connecting a motor and a speed reducer with a universal shaft for reinstallation;

s21, recovering the universal shaft, the coupler and the locking disc protective cover, reversely installing the protective cover according to the original disassembly sequence, paying attention to the distance between the protective cover body and the motor, the speed reducer and the roller body by 10-15mm, installing all bolts of the protective cover completely, and screwing the bolts and the nuts;

s22, recovering the water cooling system, checking whether impurities or foreign matters exist in the water pumping pipe and the rotary elbow before the water pumping pipe and the rotary elbow are assembled again according to the drawing, and opening a circulating water valve to check whether leakage or water seepage exists at the relevant connecting part;

s23, recovering the central lubrication system of the labyrinth seal, and resetting the lubrication system according to the installation design drawing and related documents, and testing the central lubrication system until the lubricating oil is extruded, wherein the pressure of the lubrication system is normal;

s24, recovering the top and side roller covers of the high-pressure roller mill, recovering the top and side shields of the high-pressure roller mill by using an electric hoist, and screwing the connecting bolts;

s25, recovering the rotary controller on the locking disc protecting cover;

s26, after adjustment is completed, cleaning surrounding tools and instruments, and connecting a production post and a main control room for test run.

Specifically, the electric hoist in the step S1 is selectively provided with 2 sets of electric hoist with rated load of 20T at the top of a high-pressure roller mill frame according to the weight of a single roller body of the pellet high-pressure roller mill.

Specifically, the step S6 of disassembling the water cooling system includes: after stopping, all water inlet and return valves are closed to disconnect the water supply to the rollers and the bearing blocks, the high pressure roller mill rollers are rotated by using a slow maintenance driver until the pipe plugs are in the vertical top position, the pipe plugs and the sealing rings are detached, the preassembled hoses are screwed into the holes and led into the drain pipes by using bolts, the rollers are rotated 180 DEG by using a slow maintenance driver, the pipe plugs are now in the vertical top position, the pipe plugs are loosened for a few turns so as to enable air discharge, residual cooling water is discharged from the rollers, the hoses are removed from the rotary passages and the bearing blocks, and the rotary passages are detached and put into the bottom of the rack.

Specifically, the step S8 of removing the universal shaft and the coupling includes: the electric hoist is used for fastening the universal shaft through the hoisting belt to hoist the gravity center, a spanner is used for loosening connecting bolts between the universal shaft and the motor and between the universal shaft and the speed reducer, the universal shaft is required to be pushed inwards to form a space capable of being detached from the coupler, the universal shaft is hoisted and placed in a safe place outside a working area, and a proper cover is used for protecting the universal shaft from being polluted and damaged.

Specifically, the shoulder pole tool in the step S10 is made of hot rolled H-shaped steel HW200×200a and steel plates with delta=20mm, and is used for disassembling and assembling a speed reducer, a hoisting nose I and a hoisting nose II are designed above the H-shaped steel, a flame cutting machine is used for cutting a slide plate I and a slide plate II on the steel plates with delta=20mm, inner holes of the slide plate I and the slide plate II are matched with the H-shaped steel, two hoisting holes are respectively formed below the H-shaped steel, a 5-ton American bow-shaped shackle is arranged in the hoisting holes, and 3 tons of chain blocks are hung above the American bow-shaped shackle;

and checking whether the double-shoulder-pole-type hanging beam used for replacing the squeeze roller body is deformed or not, and whether corresponding hanging eyes, flat head bolts, gaskets and check blocks are or not complete.

The carrying pole type electric hoist lifting device comprises a lifting nose I and a lifting nose II, wherein the lifting nose I and the lifting nose II are connected with two electric hoists to lift a speed reducer at the same time, the hook heads are on the same horizontal line, the carrying pole type electric hoist and a cross beam of the electric hoist form an included angle of 90 degrees, a first sliding plate and a second sliding plate are moved to the upper part of the speed reducer, a 5-ton American bow-type shackle is installed, 4 3-ton electric hoists are hung above the speed reducer, an inner side electric hoist is used for lifting a lifting point above the speed reducer, an outer side electric hoist is used for lifting a belt below the electric hoist, and when four electric hoists are subjected to forces of the same magnitude at the same time, the hydraulic expansion sleeve starts to be detached;

all the ex-warehouse on the distance blocks are closed, the pistons on the three cylinders are prolonged by equal distances, and a distance block is placed between the translation and moving devices to fix the speed reducer in place, so that the speed reducer cannot rotate when one or more cylinders suddenly lower, and the speed reducer is fixed on the balance device by using the chain block to prevent the speed reducer from sliding or tipping over.

Specifically, the grease oil pipe connection and the cooling water connection are removed from the bearing seat in the step S13, the bolts and the nuts are connected to the spacer blocks, the pre-assembled spacer blocks are installed and screwed onto the bearing seat by screwing the pre-assembled spacer blocks, the adjusting bolts are screwed out from the spacer blocks until the pre-assembled spacer blocks tightly lean against the rollers, the nuts are used for fixing the position, the stop block is connected onto the bearing seat and screwed onto the stop block by using the washers and the flat head bolts, the special lifting beam is connected onto the bearing seat and screwed onto the special lifting beam by using the washers and the bolts, the lifting belt is connected onto the lifting beam, the roller with the bearing is lifted by an electric hoist by 0.5 meter, the protection plate is installed onto the bearing seat by using the installation piece, and the roller with the bearing is lifted and removed by transportation close to the ground.

Specifically, the fixed roller in the step S13 is lifted by 0.5 m and the protective plate is removed, the fixed roller is placed on the chassis, the movable roller is lifted by 0.5 m and the protective plate is removed, the movable roller is placed on the chassis, the movable roller slides upwards towards the flat cylinder, the transportation accessory is removed, the flat cylinder is fixed on the movable roller bearing seat by using the gasket and the bolt, the bearing seat and the flat cylinder are aligned, the flat cylinder is aligned with the end piece, the piston face of the flat cylinder must be at right angles to the key groove of the frame, the piston face of the flat cylinder must be parallel to the end piece, when the piston reaches balance in any shaft at 0 ℃, the flat cylinder is correctly aligned, and at this time, the flat cylinder and the bearing are perpendicular to a certain shaft.

Specifically, the step of expanding the hydraulic expansion sleeve in the step S19 is as follows: the shrink disk is slid onto the hub, the shrink disk must be loosened from the full length of the hub before the shaft is installed, the plug is removed from the connection of the tightening or loosening instructions, all oil leakage is collected, the pressure line is connected to the marked joint to be tightened, the shrink disk is tightened by applying hydraulic pressure, once the end faces of the outer ring and the inner ring are aligned, the correct tightening force is reached, the maximum allowed hydraulic pressure is 45MPa, the annular countersunk nut is tightened onto the outer ring by hand, the hydraulic pressure is released, then, due to the stored energy, the annular nut will be tightly pressed onto the outer ring, the plug is replaced, and the hydraulic oil is retained in the shrink disk.

Specifically, the proximity switch in step S3 is mounted on the locking disc cover, the proximity switch monitors the rotational movement of the roller by using an inductive proximity switch, the signal is used to monitor whether the roller is in a static state, if the roller is jammed during operation, the motor power supply is cut off by the proximity switch, overload of the driving element is prevented by this way, the proximity switch is assembled on the locking disc cover, the screw is screwed into the locking disc as a pulse sounder, the nut is lightly knocked into the inside of the cover, the cover is covered, the locking disc is rotated until the hexagonal screw is located at the center of the vacancy where the proximity switch is located, and the gap between the proximity switch and the hexagonal screw is ensured to be 3 to 8mm.

The invention has the following beneficial effects:

according to the method for quickly replacing the roller body of the pellet high-pressure roller mill, disclosed by the invention, the high-pressure roller mill extrusion roller is lifted in place by utilizing the parallel beam electric hoist above the high-pressure roller mill frame, the integral safe and quick lifting of the high-pressure roller mill extrusion roller is realized by independently designing and manufacturing the special lifting beam for lifting the bearing seat of the high-pressure roller mill, the speed reducer is manufactured and assembled by independently designing and manufacturing the special shoulder pole tool, the four hand chain hoists are simultaneously adjusted, the speed reducer is quickly and accurately aligned in the assembling and disassembling process, the shaft sleeve gap is small in the assembling and disassembling process of the speed reducer, the disassembling and assembling difficulty is high, the integral quick and efficient replacement of the operation area of the high-pressure roller mill extrusion roller is realized, the tool design is exquisite and efficient, the method is convenient and practical, the repeated labor is reduced, the operation man-hour is greatly reduced, the equipment and the working safety is improved, and the safety risk is reduced.

Drawings

FIG. 1 is a schematic view of the overall structure of the high pressure roller mill of the present invention.

Fig. 2 is a front view of the high pressure roller mill of the present invention.

Fig. 3 is a top view of the high pressure roller mill of the present invention.

Fig. 4 is a side view of the high pressure roller mill of the present invention.

Fig. 5 is an enlarged view at E in fig. 2.

Fig. 6 is an enlarged view at F in fig. 4.

Figure 7 is a schematic view of the removable structure of the lock disk housing.

Fig. 8 is a schematic view of the structure of a roll mantle of the high-pressure roll mill.

Fig. 9 is a schematic structural view of a lubrication system of a high pressure roller mill.

Fig. 10 is a schematic view of the structure of the high-pressure roller mill cooling system.

Fig. 11 is a schematic view of a disassembled structure of the cardan shaft shield of the high-pressure roller mill.

Fig. 12 is a schematic view of a disassembled structure of the locking disk.

Fig. 13 is a schematic view of a disassembled structure of the universal shaft.

FIG. 14 is a schematic view of the structure of the feeding device.

Fig. 15 is a schematic view of the structure of a high pressure mill side baffle.

Fig. 16 is a schematic view of the structure of the high-pressure roller mill frame.

Fig. 17 is a schematic view of the structure of the upper frame of the high-pressure roller mill.

Fig. 18 is a schematic structural view of a high pressure roller mill sling attachment.

Fig. 19 is a schematic view of a structure of lifting a squeeze roller of a high-pressure roller mill.

In the figure: 1-a lock disk protecting cover; 2-roller cover; 3-a lubrication system; 4-a cooling system; 5-a cardan shaft shield; 6-a feeding device; 7-a frame; 8-a roller body; 9-a motor; 10-a speed reducer;

101-a rotary controller; 102-locking the disc cover; 103-a separator;

201-end roller cover; 202-gate; 203-a top cover;

301-hose;

501-a cardan shaft; 502-universal shaft connecting bolts;

801-spacer blocks; 802-a stop; 803-threaded hooks; 804-hanging beam;

1001 double balance beams; 1002-electric hoist; 1003- "double shoulder pole" tooling; 1004-hoisting a nose I; 1005-hoisting a nose II; 1006-H section steel; 1007-skateboard one; 1008-second slide plate; 1009-American bow shackle; 1010-chain block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described in further detail below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one:

as shown in fig. 1 to 19, a method for rapidly replacing the whole roll body of a pellet high-pressure roller mill comprises the following steps:

(1) Work preparation before construction, installation of an electric hoist and manufacturing of a tool.

According to the weight 15 tons of a single roller body 8 (comprising a bearing pedestal and a bearing) of the pellet high-pressure roller mill, 2 sets of electric hoist 1002 with rated load of 20T are designed and installed in parallel at the top of a frame 7 of the high-pressure roller mill, one end of the electric hoist is positioned above a hoisting opening, the other end of the electric hoist is positioned above a squeeze roller of the high-pressure roller mill, and the squeeze roller of the disassembly and assembly can be subjected to one-time transportation of the hoisting opening or the frame 7 through the electric hoist, so that complex and potential safety hazards of multiple transportation are prevented. Before replacement construction, whether the electric hoist 1002 and each hanging point are normal and firm is checked.

A special shoulder pole tool 1003 for disassembling and assembling the speed reducer 10 is manufactured by adopting hot rolled H-shaped steel 1006HW200×200a and steel plates with delta=20mm. The H-shaped steel 1006 is respectively 500mm in the vertical horizontal projection of the electric hoist 1002, a lifting nose (a lifting nose I1004 and a lifting nose II 1005) is designed above the H-shaped steel 1006, the distance is the horizontal projection distance of the electric hoist 1002 vertical beam, a sliding plate (a sliding plate I1007 and a sliding plate II 1008) is cut on a steel plate with delta=20 mm by using a flame cutting machine, an inner hole of the sliding plate I1007 and the sliding plate II 1008 are matched with the H-shaped steel 1006, two lifting holes are respectively formed below the sliding plate I and II, a 5-ton American bow-shaped shackle 1009 is respectively arranged, and two sides of the H-shaped steel 1006 are blocked by the steel plates, so that the sliding plate is prevented from sliding out.

And independently designing and manufacturing a lifting beam special for lifting the bearing seat of the high-pressure roller mill, and checking whether lifting eyes, flat head bolts, gaskets and check blocks are complete or not.

(2) And various start-up procedures are handled. And (5) confirming power failure and card hanging of the high-pressure roller mill and the roller-2 belt.

(3) The rotary control 101 on the lock disk protecting cover 1 is detached. The nut of the rotary controller 101 is loosened, the washer and the proximity switch are removed, and the proximity switch on the roller press is fixed in place, so that the roller press cannot be damaged in subsequent reinstallation work.

(4) The top and side roll covers 2 are removed. The lifting belt is matched with an electric hoist to remove the mounting piece on the high-pressure roller mill frame 7, the door and the lower side plate are disassembled, lifted out of the frame 7 and placed in a designated safety area.

(5) The labyrinth seal central lubrication system 3 is disassembled. The high pressure hose 301 is pulled out of the bearing seat and is tied to the top of the frame 7, placed high and dust protected. Before disassembly begins, hose 301 and tubing are clearly marked so that they can be quickly reconnected to the mating port upon reassembly (e.g., recorded using a sign).

(6) The water cooling system 4 is disassembled. After stopping, all water inlet valves and water return valves are closed to cut off the water supply of the roller and the bearing seat. And rotating the roller of the high-pressure roller mill by using a slow-speed driver for maintenance until the pipe plug is in a vertical top position, and detaching the pipe plug and the sealing ring. The preassembled hose is screwed into the hole using a bolt and led into the drain pipe. The roller was rotated 180 ° using a slow maintenance drive. The plug is now in the vertical top position and is released a few turns to enable venting. The residual cooling water is drained from the rollers, the hose is removed from the swivel passage and the bearing housing, the swivel passage is removed and placed in the bottom of the frame 7.

(7) The coupler, cardan shaft 501 and lock disk cover 1 are disassembled. The cardan shaft protection cover 5 is loosened and the hoisting belt connection hoisting device or the standard hoisting device is connected to the cardan shaft protection cover 5. The cardan shaft shield 5 is lifted out using the electric hoist 1002 and lowered to a safe place.

The lock disk housing 1 mounting assembly is loosened and removed and the spacer removed. The preassembled components are slid back onto the bearing blocks, the corresponding bolts, nuts are loosened and the upper housing component is removed.

(8) The universal shaft 501 and the coupling are disassembled. The electric hoist 1002 is used for fastening the universal shaft 501 through a hoisting belt to hoist the gravity center, and a spanner is used for loosening connecting bolts between the universal shaft 501 and the motor 9 and between the universal shaft and the speed reducer 10. The cardan shaft 501 has to be pushed inwards to form a space from which it can be removed from the coupling. The cardan shaft 501 is lifted and placed outside the working area in a safe place, using a suitable cover to protect the cardan shaft 501 from contamination and damage.

(9) The disassembly high-pressure roller mill is connected with a hydraulic expansion sleeve with the speed reducer 10. The method comprises the steps of simultaneously lifting a lifting nose one 1004 and a lifting nose two 1005 of a special shoulder pole tool 1003 for disassembling and assembling the speed reducer by two electric hoists 1002, enabling the hook heads to be on the same horizontal line, enabling the tool to form an included angle of 90 degrees with a beam of the electric hoist 1002, moving a first slide plate 1007 and a second slide plate 1008 to the upper side of the speed reducer 10, installing a 5-ton American bow-type shackle 1009, hanging 4 3-ton hand chain hoists 1010 above the speed reducer 10, hanging the inner side hand chain hoists 1010 on lifting points above the speed reducer 10, enabling the outer side electric hoist 1002 to pass through the bottom of the speed reducer 10 through a lower lifting belt, and starting to disassemble a hydraulic expansion sleeve when the four hand chain hoists 1010 have the same force.

Closing all the ex-warehouse on the distance blocks, and extending the pistons on the three cylinders by equal distances. The placement of spacer blocks between the translation and play means secures the speed reducer 10 in position so that the speed reducer 10 cannot rotate when one or more cylinders suddenly drop. The speed reducer 10 is fixed to the balance device using the chain block 1010, preventing it from sliding or tipping over.

(10) The speed reducer 10 is separated from the high pressure roller mill. The speed reducer 10 body is fixed by using a special shoulder pole tool 1003, the torque supporting pin shaft of the speed reducer 10 is taken out by using a large hammer, the speed reducer 10 is moved to a direction far away from the high-pressure roller mill by utilizing a gap between the hydraulic jack and the speed reducer 10 body, the speed reducer 10 is gradually separated from the shaft, and the speed reducer 10 is laid down after being separated by a certain distance.

Thereby removing the other speed reducer 10.

(11) The side dams and feeding device 6 are removed. The electric block 1002 is positioned onto the side guards, and the bolts and washers are loosened and removed. The side guards are lifted out of the frame 7 and placed in an externally safe location; a suitable lifting device is attached to the feeder device 6 and the bolts and washers are removed. And the connection between the exhaust port and the inlet groove is detached. The feeding device 6 is lifted out and safely placed outside the working area.

(12) And (5) dismantling the upper rack. The electric hoist 1002 is coupled to the upper frame member and tightens the hoist belt. The protective cover is removed and nuts and washers removed and the mounting components of the intermediate pieces are removed at the top and bottom of the frame 7. The electric block 1002 equipment is placed in place and the hoist belt is attached to the attachment point on the frame member. The bolts and washers are loosened and removed, and the intermediate piece is lifted and lifted to a suitable position.

Note that: before the nuts are loosened, the frame part must be attached to the hoisting device to prevent the frame part from falling off.

(13) And lifting out the movable roller and the fixed roller by using a tool special for lifting the bearing seat.

The grease tube connection and the cooling water connection are removed from the bearing block. Bolts and nuts are attached to the spacer blocks. The preassembled spacer is installed and screwed onto the bearing housing using a screw. The adjusting bolt is screwed out of the spacer until it is tightly against the roller. The special lifting beam for lifting the bearing seat of the high-pressure roller mill with the lifting eye is mounted on the stop block by fixing the position through a nut, connecting the stop block to the bearing seat and screwing the stop block through a gasket and a flat head bolt. The special lifting beam is attached to the bearing housing and tightened using washers and bolts. The lifting belt was attached to the lifting beam, lifted by the electric hoist 1002, carefully lifted the bearing-carrying roller 0.5 meters to mount the protective plate to the bearing housing and screwed down using the mount. Carefully lift the roller with bearings and transport the removal hoisting device next to the ground.

(14) The accumulated materials in the frame 7 and the cavity are cleaned, the damage of the key groove of the roller bearing seat is checked, and dirt is cleaned to check whether the thrust bearing is perfect.

(15) And (5) carrying out the reloading of the high-pressure roller mill and the fixed roller. The fixed roller was first lifted 0.5 meters and the protective plate removed and the roller placed on the chassis. The movable roller was lifted 0.5 meters and the protective plate removed and the roller was placed on the chassis. The movable roller is slid upward toward the flat cylinder, and the transport accessory is removed. The flat cylinder is secured to the movable roller bearing housing using washers and bolts, the bearing housing and flat cylinder are aligned, and the flat cylinder is aligned with the end piece (the piston face of the flat cylinder must be at right angles to the frame keyway, and the piston face of the flat cylinder must be parallel to the end piece. When the piston is balanced in any axis at 0℃, it is indicated that the flat cylinder is properly aligned. At this point, the flat cylinder and support are perpendicular to one axis.

The intermediate piece is placed between the two rollers on the frame 7, mounted to the chassis using the mounting, lifted up and placed on the chassis.

(16) The upper frame is restored, the auxiliary support is restored, and the external sliding key and the external protection device are assembled. The upper frame is installed in the reverse direction in the order of disassembly, all side plates are installed inside the frame, and the protective cover is placed on the bearing seat and fixed in place using washers and bolts. The grease collecting box is attached to the frame with a horn and secured using washers and bolts. The grease collection box is placed on the frame corner piece.

(17) The side baffles and the feeding device 6 are assembled back. The feeding device 6 is positioned on the chassis using the electric hoist 1002, and is screwed down using bolts and washers. The thrust bolts are positioned onto the intermediate piece, the side dams are adjusted to ensure that the gap between the side dams and the feeding device housing is 1 mm, if the spacing is incorrect, the distance of the side dams is adjusted by tightening or loosening the nuts, the gap between the roller surface and the side dams is ensured to be 1 mm, and if the spacing is incorrect, the nuts are loosened. The side dams are gently pressed against the roller surface using thrust bolts. When the side baffle is abutted against the roller surface, the half circle of the bolt is pressed and tightly pressed towards the rotation. The existing clearance is ensured to be 1 mm, and the nut is tightly screwed.

(18) The high-pressure roller mill speed reducer 10 is assembled. Oil stains and dust on the hollow shaft and the extrusion roller shaft diameter of the speed reducer 10 are cleaned by gasoline, and burrs are removed. A hydraulic expansion sleeve coupler is sleeved outside the hollow shaft of the speed reducer 10. The special shoulder pole tool 1003 is hung by using the electric hoist 1002, and the axis of the speed reducer 10 is kept consistent with the squeeze roller bearing through the chain block 1010 and the frame type level meter.

The speed reducer 10 is slowly and evenly moved until a minimum play is achieved between the hollow shaft and the front side of the roller, the hollow shaft is precisely aligned with the roller in the vertical and horizontal planes, and the speed reducer 10 is slowly and evenly journaled onto the main pump journal until the end position is reached.

The speed reducer 10 body and the torsion frame are connected together through a pin shaft and a knuckle bearing.

(18) The hydraulic expansion sleeve Zhang Zhang is tight. The mounting areas of the shaft and hub must be completely grease free. The shrink disk is slid onto the hub. The shrink disk must be full length with the hub and be loosened prior to installation of the shaft. The plugs were removed from the "wrench" (screw down) and "Entspannen" (screw down) connections and all oil spills were collected. The pressure line was connected to a "wrench" (screw down) on the marked joint. The shrink disk is screwed down by applying hydraulic pressure. Once the end faces of the outer and inner rings are aligned (visually flush), the correct tightening force is achieved. The maximum allowable hydraulic pressure is 45MPa. The annular countersunk nut is screwed onto the outer ring by hand, releasing the hydraulic pressure. The ring nut will then be pressed tightly against the outer ring due to the stored energy. The plug screw is replaced and the hydraulic oil is retained in the shrink disk.

(20) The cardan shaft 201 is reinstalled. The input shaft of the speed reducer, the output shaft of the main motor and the flanges at two ends of the transmission shaft are cleaned by gasoline. The two flange plates are respectively sleeved on the input shafts of the two speed reducers 10 and the output shaft of the main motor 9. After the flat key on the flange plate is installed, the middle section universal joint transmission shaft can be positioned, and one end of the speed reducer 10 is installed first. And (5) screwing the connecting bolt of the universal joint transmission shaft bearing seat and the chassis by using a torque wrench. And tightening the bolt sets of the coupling flange of the speed reducer 10 and the universal joint transmission coupling flange. And filling lubricating oil into the universal joint transmission shaft. And electrifying the main motor, and tightening bolts of the main motor connecting flange and the universal joint transmission shaft connecting flange after confirming that no-load operation is possible.

(21) The cardan shaft 501, the coupling and the lock disk cover 1 are restored. And (3) reversely installing the protective cover according to the original disassembly sequence, paying attention to the fact that the protective cover body is 10-15mm away from the motor 9, the speed reducer 10 and the roller body 8, installing all bolts of the protective cover completely, and screwing the bolts and nuts.

(21) The water cooling system 4 is restored. According to the drawing, the water pipe, the rotary elbow and the corresponding rubber pipe are installed again, before the installation, whether impurities or foreign matters exist in the water pipe and the rotary elbow is checked, a circulating water valve is opened, and whether leakage or water seepage exists at the relevant connecting position is checked.

(23) The labyrinth-sealed central lubrication system 3 is restored. And (3) the centralized lubrication system 3 is tested according to the installation design drawing and related documents until the lubrication oil is extruded, and the pressure of the lubrication system is normal.

(24) The top and side roll covers of the high pressure mill are restored. And recovering the top and side shields of the high-pressure roller mill by using an electric hoist, and screwing the connecting bolts.

(25) The rotary controller 101 on the locking disc shield 1 is restored. An inductive proximity switch on the locking disc cover 102 monitors the rotational movement of the roller. This signal is used to monitor whether the roller is in a stationary state. If the roller jams during operation, the motor power is cut off by the proximity switch, in such a way that overload of the drive element is prevented. The proximity switch is assembled on the locking disc cover, a screw is screwed into the locking disc to serve as a pulse sounder, a nut is gently knocked into the cover, and the cover is covered. And rotating the locking disc until the hexagonal screw is positioned at the center of the gap where the proximity switch is positioned, and ensuring that the gap between the proximity switch and the hexagonal screw is 3 to 8mm.

(26) After the adjustment is finished, the surrounding tools and instruments are cleaned, and the production post and the main control room are contacted for trial run.

The present invention is not limited to the above embodiments, and any person who can learn the structural changes made under the teaching of the present invention can fall within the scope of the present invention if the present invention has the same or similar technical solutions.

The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.

Claims

1. The method for quickly replacing the roller body of the pellet high-pressure roller mill is characterized by comprising the following steps of:

s6, disassembling the water cooling system;

s8, disassembling the universal shaft and the coupler;

s11, disassembling the side baffle and the feeding device;

s17, returning the side baffle plate and the feeding device;

s19, expanding the hydraulic expansion sleeve by using a tool;

s25, recovering the rotary controller on the locking disc protecting cover;

2. The method for quickly replacing the roller bodies of the high-pressure roller mill according to claim 1, wherein the electric hoist in the step S1 is used for selectively installing 2 sets of electric hoist with rated load of 20T on the top of a frame of the high-pressure roller mill according to the weight of a single roller body of the high-pressure roller mill.

3. The method for rapid replacement of a roll body of a pellet high-pressure roller mill according to claim 1, wherein the step of disassembling the water cooling system in the step S6 is as follows: after stopping, all water inlet and return valves are closed to disconnect the water supply to the rollers and the bearing blocks, the high pressure roller mill rollers are rotated by using a slow maintenance driver until the pipe plugs are in the vertical top position, the pipe plugs and the sealing rings are detached, the preassembled hoses are screwed into the holes and led into the drain pipes by using bolts, the rollers are rotated 180 DEG by using a slow maintenance driver, the pipe plugs are now in the vertical top position, the pipe plugs are loosened for a few turns so as to enable air discharge, residual cooling water is discharged from the rollers, the hoses are removed from the rotary passages and the bearing blocks, and the rotary passages are detached and put into the bottom of the rack.

4. The method for quickly replacing the roll body of the pellet high-pressure roller mill according to claim 1, wherein the step of disassembling the universal shaft and the coupling in the step S8 is as follows: the electric hoist is used for fastening the universal shaft through the hoisting belt to hoist the gravity center, a spanner is used for loosening connecting bolts between the universal shaft and the motor and between the universal shaft and the speed reducer, the universal shaft is required to be pushed inwards to form a space capable of being detached from the coupler, the universal shaft is hoisted and placed in a safe place outside a working area, and a proper cover is used for protecting the universal shaft from being polluted and damaged.

5. The method for quickly replacing the roller body of the pellet high-pressure roller mill according to claim 1, wherein the shoulder pole tool in the step S10 is made of hot rolled H-shaped steel HW200×200a and steel plates with delta=20mm and used for disassembling and assembling a speed reducer, a first hoisting nose and a second hoisting nose are designed above the H-shaped steel, a first sliding plate and a second sliding plate are cut on the steel plates with delta=20mm by using a flame cutting machine, inner holes of the first sliding plate and the second sliding plate are matched with the H-shaped steel, two hoisting holes are formed below the H-shaped steel, a 5-ton American-type shackle is arranged in the hoisting holes, and 3 tons of chain blocks are hung above the American-type shackle;

6. The method for quickly replacing the roller body of the pellet high-pressure roller mill according to claim 5, wherein the shoulder pole tool is used for simultaneously lifting a speed reducer through a lifting nose I and a lifting nose II, the hook heads of the shoulder pole tool and a beam of the electric hoist form an included angle of 90 degrees, the first slide plate and the second slide plate are moved above the speed reducer, a 5 ton American bow-type shackle is arranged, 4 3 ton chain blocks are suspended above the speed reducer, an inner chain block is used for lifting a lifting point above the speed reducer, an outer chain block passes through the bottom of the speed reducer through a lower lifting belt, and when four chain blocks simultaneously exert the same force, the hydraulic expansion sleeve starts to be detached;

7. The method for quick replacement of the roll body of the pellet high pressure roll mill according to claim 1, wherein the grease pipe connection and the cooling water connection are removed from the bearing housing in the step S13, the bolts and nuts are connected to the spacer blocks, the pre-assembled spacer blocks are installed and screwed to the bearing housing by screwing the adjusting bolts from the spacer blocks until they tightly lean against the rollers, the special hanging beam is installed to the block by using the nut fixing position, the block is connected to the bearing housing and screwed to the bearing housing by using the washers and the flat head bolts, the special hanging beam is connected to the bearing housing and screwed to the same by using the washers and the bolts, the hanging strip is connected to the hanging beam, the protection plate is installed to the bearing housing by lifting the roller with the bearing by an electric hoist by lifting the protection plate by 0.5 m, the roller with the bearing is lifted by using the installation member, and the hanging device is removed by lifting the roller with the bearing and transporting the hanging device close to the ground.

8. The method for rapidly replacing the roll body of the pellet high-pressure roller mill according to claim 1, wherein the fixed roll in the step S13 is lifted by 0.5 m and the protective plate is removed, the fixed roll is placed on the bottom frame, the movable roll is lifted by 0.5 m and the protective plate is removed, the movable roll is placed on the bottom frame, the movable roll is slid upward toward the flat cylinder, the transport accessory is removed, the flat cylinder is fixed to the movable roll bearing seat by using a washer and a bolt, the bearing seat and the flat cylinder are aligned, the flat cylinder is aligned with the end piece, the piston face of the flat cylinder must be at right angle with the frame key groove, the piston face of the flat cylinder must be parallel with the end piece, and when the piston reaches balance in any axis at 0 ℃, the flat cylinder is indicated to be aligned correctly, and at this time, the flat cylinder and the bearing are perpendicular to a certain axis.

9. The method for rapidly replacing the roll body of the pellet high-pressure roller mill according to claim 1, wherein the step of expanding the hydraulic expansion sleeve in the step S19 is as follows: the shrink disk is slid onto the hub, the shrink disk must be loosened from the full length of the hub before the shaft is installed, the plug is removed from the connection of the tightening or loosening instructions, all oil leakage is collected, the pressure line is connected to the marked joint to be tightened, the shrink disk is tightened by applying hydraulic pressure, once the end faces of the outer ring and the inner ring are aligned, the correct tightening force is reached, the maximum allowed hydraulic pressure is 45MPa, the annular countersunk nut is tightened onto the outer ring by hand, the hydraulic pressure is released, then, due to the stored energy, the annular nut will be tightly pressed onto the outer ring, the plug is replaced, and the hydraulic oil is retained in the shrink disk.

10. The method according to claim 1, wherein the proximity switch in the step S3 is mounted on the locking disc cover, the proximity switch monitors the rotational movement of the roller using an inductive proximity switch, the signal is used to monitor whether the roller is in a stationary state, if the roller is jammed during operation, the motor is cut off by the proximity switch, overload of the driving element is prevented by this means, the proximity switch is mounted on the locking disc cover, the screw is screwed into the locking disc as a pulse generator, the nut is lightly tapped into the inside of the cover, the cover is closed, the locking disc is rotated until the hexagonal screw is in the center of the space where the proximity switch is located, and the clearance between the proximity switch and the hexagonal screw is ensured to be 3 to 8mm.