High pressure roller mill with quick maintenance function

Abstract

The utility model relates to a high pressure roller mill with quick maintenance function belongs to high pressure roller mill technical field, specifically, it relates to a high pressure roller mill with quick maintenance function. The utility model provides a high pressure roller mill with quick maintenance function to reduce the overhaul workload, shorten the downtime overhaul time, reduce the maintenance cost, reduce the workshop construction investment cost. The utility model includes two opposite arrangement side frame body, its characterized in that: two side frame body lower part all with the hinge joint of bed, and two side frame body upper part both sides are connected with each other through the tension device, two roller systems are arranged in two side frame body inside respectively, and one material flow circulation channel is formed between two roller systems, and the feeding device is equipped above the channel, and each roller system includes the main shaft and a plurality of split roller tire, and the split roller tire is fixed on the main shaft, and is combined into the cylindrical working roller surface along the circumferential direction of the main shaft, and two roller systems are connected with the driving device.

Description

Technical Field

[0001] This utility model belongs to the technical field of high pressure roller mills, specifically, it relates to a high pressure roller mill with a rapid maintenance function. Background Technology

[0002] High-pressure roller mills have gained widespread recognition and application as grinding equipment in the metallurgical pelletizing industry or crushing equipment in the mineral processing industry. With the increasing number of application cases of high-pressure roller mills, users are accumulating more and more experience, and are paying increasing attention to the later maintenance and operating rate of the equipment during the application process.

[0003] The roller system is the component of a high-pressure roller mill that requires the most maintenance; in fact, its maintenance and replacement are arguably the main factors affecting the mill's operating rate. However, conventional high-pressure roller mills have several drawbacks in terms of roller system maintenance and replacement. Firstly, in conventional high-pressure roller mills, the rollers are fixed to the main shaft as a single unit using a heat-fitting method. When the rollers become worn and unusable, the entire roller system must be replaced. There are two main methods for replacing the entire roller system: one is to return the entire roller system to the factory, where the supplier disassembles the original rollers, bearings, and other components, heat-fits new rollers onto the original main shaft, reinstalls the bearings and other components, and finally transports the roller system back to the user's site for installation. This method is cumbersome and severely impacts equipment operating rates. The other method is for the supplier to manufacture a completely new roller system, including the main shaft, rollers, bearings, and all other components, and transport it to the user's site to directly replace the damaged rollers. This method significantly shortens replacement time and is the most commonly used method in practice, but it requires the manufacture of a complete roller system, resulting in capital tied up and wasted resources. Secondly, when replacing the roller system, the reducer must first be removed from the old roller system, and then installed on the new roller system after it has been installed. In ordinary high-pressure roller mills, the reducer is fixedly connected to one end of the roller system's main shaft via a locking disc. The coaxiality of the reducer and main shaft needs to be achieved by adjusting the tightening torque of the locking disc bolts. This connection method requires installation personnel to have certain experience, and the installation process also involves a certain element of luck. Even under favorable conditions, completing the locking of a pair of roller system locking discs takes at least three days. Finally, replacing the roller system in an ordinary high-pressure roller mill is almost equivalent to completely disassembling and reassembling the entire equipment; the steps are cumbersome and labor-intensive. In short, from removing the old roller system to installing the new roller system and restoring normal operation, an ordinary high-pressure roller mill takes at least two weeks, severely impacting the equipment's operating rate. Utility Model Content

[0004] This utility model addresses the aforementioned problems and overcomes the shortcomings of existing technologies by providing a high-pressure roller mill with rapid maintenance capabilities, thereby reducing maintenance workload, shortening downtime for maintenance, lowering maintenance costs, and reducing investment costs in factory construction.

[0005] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a high-pressure roller mill with rapid maintenance function, comprising two opposing side frames, characterized in that: the lower parts of both side frames are hinged to the machine base, and the upper sides of the two side frames are connected to each other by a tensioning device; two roller systems are respectively arranged inside the two side frames, forming a material flow channel between the two roller systems, and a feeding device is provided above the channel; each roller system includes a main shaft and multiple segmented rollers, the segmented rollers are fixed on the main shaft and combined along the circumferential direction of the main shaft to form a cylindrical working roller surface; both roller systems are connected to a drive device.

[0006] In a preferred embodiment of this utility model, the driving device includes a reducer, a universal coupling, and a motor. The motor output shaft is connected to the reducer input shaft via the universal coupling. Each driving device can drive the connected roller system to rotate. The transition flange is connected between the reducer and the main shaft of the roller system and consists of a shaft end flange, a cross key, and a transmission end flange. The shaft end flange is fixed to the input end of the main shaft of the roller system and is concentric with the main shaft through a stop. The transmission end flange is fixed to the output end of the reducer. The cross key passes through the main shaft, the shaft end flange, and the transmission end flange, connecting the three.

[0007] As another preferred embodiment of this utility model, a flipping maintenance device is provided on the outer side of the side frame. The flipping maintenance device includes a movable base, a flipping frame, a primary flipping device, a secondary flipping device, and a support beam. The movable base is connected to the machine base through the support beam, and the flipping frame is hinged on the movable base. The two ends of the primary flipping device are respectively connected to the flipping frame and the side frame. The two ends of the secondary flipping device are respectively connected to the movable base and the flipping frame. The flipping frame is installed on the side frame through a fixing device.

[0008] As a third preferred embodiment of this utility model, a transition wear-resistant strip is provided between adjacent segmented rollers, and the transition wear-resistant strip is made of tungsten carbide powder metallurgy material; the segmented rollers are provided with holes for installing studs, and the studs and holes are clearance fit, with a clearance of 0.04 to 0.07 mm on one side.

[0009] As a fourth preferred embodiment of this utility model, the side frame is an integral frame structure that can be rotated around the detachable main pin shaft mounted on the base.

[0010] As a fifth preferred embodiment of this utility model, the base is provided with a main pin hole and a fixed pin hole on both the left and right sides; the main pin hole is used to install the main pin and serve as the hinge point for the flipping of the side frame; the fixed pin hole is used to install the fixed pin to restrict the flipping of the side frame.

[0011] As a sixth preferred embodiment of this utility model, the main shaft end of the roller system is provided with a stop, a threaded hole and a keyway structure, and is connected to the drive device through a detachable adapter flange.

[0012] As a seventh preferred embodiment of this utility model, the cross-section of the segmented roller is fan-shaped, and multiple individually detachable segmented rollers are bolted to the outer surface of the main shaft along the circumferential direction of the roller system to form a cylindrical working roller surface.

[0013] As the eighth preferred embodiment of this utility model, the lower part of the movable base is provided with multiple sets of rollers, and one or two sets of rollers serve as drive wheels, powered by an electric motor or hydraulic motor; the primary flipping device and the secondary flipping device are hydraulic cylinders, pneumatic cylinders or electric push rods.

[0014] Compared with the prior art, this utility model has the following advantages: the connection of the adapter flange can realize the quick disassembly or installation of the reducer and the main shaft of the high-pressure roller mill. Compared with the locking disc connection method of ordinary high-pressure roller mill, the disassembly and assembly process is faster and can save more than 60% of the time. The flipping maintenance device can make the side frame and the roller system unfold outward, forming an open maintenance space on the upper part of the roller system. With the split roller tire structure, the quick disassembly and replacement of one or more split roller tires can be realized. Compared with the overall replacement of ordinary high-pressure roller mill tires, this utility model not only achieves online maintenance, but also saves more than 50% of maintenance time, eliminates the need for main shaft spare parts, reduces capital investment, and lowers maintenance costs. The segmented roller structure reduces the lifting capacity requirements of the high-pressure roller mill workshop, especially for large high-pressure roller mills, significantly reducing the initial investment in infrastructure and equipment such as factory buildings and cranes. The gap fit between the pins and holes in the segmented roller allows for online replacement of individual pins, improving the flexibility of roller surface wear maintenance and extending the service life of the segmented roller. Attached Figure Description

[0015] To make the technical solution and beneficial effects of this utility model clearer, the following description, in conjunction with the accompanying drawings, further illustrates this utility model. However, the specific structural forms shown in the drawings do not constitute a limitation on this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a utility model Figure 1 The structure shown is viewed from direction AA.

[0018] Figure 3 This is a schematic diagram of the installation structure of the roller system component of this utility model.

[0019] Figure 4This is a utility model Figure 3 View of the structure shown from direction B.

[0020] Figure 5 This is a schematic diagram of the drive device of this utility model.

[0021] Figure 6 This is a schematic diagram of the installation structure of the adapter flange of this utility model.

[0022] Figure 7 This is a schematic diagram of the installation structure of the flip-over maintenance device of this utility model.

[0023] Figure 8 This is a schematic diagram of step one of the maintenance methods of this utility model.

[0024] Figure 9 This is a schematic diagram of step two of the maintenance method of this utility model.

[0025] Figure 10 This is a schematic diagram of step three of the maintenance method of this utility model.

[0026] In the diagram, the markings are as follows: 1 is the side frame, 2 is the machine base, 3 is the tensioning device, 4 is the roller system, 4-1 is the main shaft, 4-2 is the segmented roller, 4-3 is the fastening bolt, 4-4 is the transition wear-resistant strip, 4-5 is the reinforcing key, 4-6 is the stud, 5 is the drive device, 5-1 is the reducer, 5-2 is the universal coupling, 5-3 is the motor, 6 is the adapter flange, 6-1 is the shaft end flange, 6-2 is the cross key, 6-3 is the transmission end flange, 7 is the feeding device, 8 is the tilting and maintenance device, 8-1 is the support beam, 8-2 is the movable base, 8-3 is the primary tilting device, 8-4 is the tilting frame, 8-5 is the secondary tilting device, 8-6 is the fixing device, 9 is the upper pin, 10 is the fixed pin, and 11 is the main pin. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings. The embodiments described below are for illustrative purposes only and are not intended to limit the scope of the invention.

[0028] like Figure 1As shown, this utility model discloses a high-pressure roller mill with rapid maintenance function, comprising a side frame 1, a base 2, a tensioning device 3, a roller system 4, a drive device 5, a transition flange 6, a feeding device 7, and a tilting and maintenance device 8. Each side frame 1, tensioning device 3, roller system 4, drive device 5, and transition flange 6 is present in pairs and arranged in pairs on the left and right sides of the equipment. The two side frames 1 are arranged facing each other, and their lower parts are hinged to the base 2 via a main pin 11. Each side frame 1 can rotate and tilt around its main pin 11. The upper parts of the two side frames 1 are connected to each other via the tensioning device 3, which is a telescopic structure used to provide tension force on the side frames during high-pressure crushing of materials.

[0029] Each roller system 4 consists of a main shaft 4-1 and multiple segmented rollers 4-2. Several segmented rollers 4-2 are bolted and fixed to the main shaft 4-1 by fastening bolts 4-3, together forming a cylindrical working roller surface for the roller mill. Each segmented roller 4-2 can be disassembled and replaced individually. A reinforcing key 4-5 is provided between the main shaft 4-1 and each segmented roller 4-2. A transition wear-resistant strip 4-4, made of tungsten carbide powder metallurgy material, is inserted between adjacent segmented rollers 4-2 to fill the gaps between them and withstand transitional wear. Each segmented roller 4-2 has several mounting holes, in which studs 4-6 are installed. The studs 4-6 and the holes are clearance-fitted, with a clearance of 0.04–0.07 mm on one side. Two roller systems 4 are respectively horizontally arranged inside two side frames 1 and mounted on the side frames 1 by bearings. Two roller systems 4 are arranged at intervals to each other, forming a vertical material flow channel between them. A feeding device 7 is provided above to supply the material to be processed into the channel.

[0030] The drive unit 5 includes a reducer 5-1, a universal coupling 5-2, and a motor 5-3. The output shaft of the motor 5-3 is connected to the input shaft of the reducer 5-1 via the universal coupling 5-2, thereby driving the reducer to operate. The output end of the reducer 5-1 is connected to the main shaft 4-1 of the roller system 4 via the adapter flange 6, realizing power output to the roller system 4. The adapter flange 6 consists of a shaft end flange 6-1, a cross key 6-2, and a transmission end flange 6-3. The shaft end flange 6-1 is fixedly fitted onto the input end of the main shaft 4-1, and the two are concentrically positioned by the stop at the end of the main shaft. The transmission end flange 6-3 is fixedly connected to the output shaft end of the reducer 5-1. The cross key 6-2 passes through the main shaft 4-1, the shaft end flange 6-1, and the transmission end flange 6-3 in sequence, fastening the three together as one unit. By adopting the connection structure of the aforementioned adapter flange 6, compared with the ordinary high-pressure roller mill's method of connecting the reducer and the main shaft with a locking disc, the alignment, installation, and disassembly of the reducer 5-1 and the main shaft 4-1 can be completed more quickly and conveniently.

[0031] The overturning maintenance device 8 is arranged on the outside of the side frame 1, and is used to overturn the side frame along with the roller system to the outside of the equipment during maintenance. The overturning maintenance device 8 includes a support beam 8-1, a movable base 8-2, a primary overturning device 8-3, an overturning frame 8-4, a secondary overturning device 8-5, and a fixing device 8-6. One end of the support beam 8-1 is connected to the machine base 2, and the other end is connected to the movable base 8-2 to support the overturning maintenance device. The overturning frame 8-4 is mounted on the movable base 8-2 by a hinged pivot, and can rotate and overturn around the hinge axis on the movable base 8-2. The two ends of the primary overturning device 8-3 are pivotally connected to the overturning frame 8-4 and the side frame 1, respectively, and are used to drive the side frame to perform a first overturning movement relative to the machine base. The two ends of the secondary overturning device 8-5 are pivotally connected to the movable base 8-2 and the overturning frame 8-4, respectively, and are used to drive the overturning frame to perform a second overturning movement relative to the movable base. The tilting frame 8-4 is installed and fixed to the outer surface of the side frame 1 by the fixing device 8-6, which is used to lock the two together during the tilting process.

[0032] The side frame 1 is an integral frame structure that can be rotated around the detachable main pin 11 mounted on the base 2. With the side frame 1 vertically mounted as the 0° reference, its rotation range is from 10° inward to 110° outward.

[0033] Furthermore, the base 2 has main pin holes and fixed pin holes on both the left and right sides. The main pin holes are used to install the main pin 11, which serves as the hinge fulcrum for the side frame 1 to rotate; the fixed pin holes are used to install the fixed pin 10 to restrict the rotation movement of the side frame 1 in a non-maintenance state.

[0034] Furthermore, a main shaft 4-1 is installed in the roller system 4. The shaft end of the main shaft 4-1 is provided with a stop for coaxial positioning, a threaded hole for connection and fastening, and a keyway structure for transmitting torque. The main shaft 4-1 is connected to the drive device 5 through a detachable adapter flange 6.

[0035] Furthermore, the cross-section of the segmented roller 4-2 is fan-shaped. Multiple segmented rollers 4-2 are detachably fixed to the outer surface of the main shaft 4-1 along the circumferential direction of the roller system 4-1 by bolts 4-3, forming a cylindrical working roller surface.

[0036] Furthermore, the tilting and maintenance device 8 is equipped with a support beam 8-1, a movable base 8-2, a tilting frame 8-4, a primary tilting device 8-3, and a secondary tilting device 8-5. The movable base 8-2 has multiple sets of rollers installed on its lower part, with one or two sets of rollers serving as drive wheels, powered by a motor or hydraulic motor, enabling the movable base 8-2 and the entire tilting and maintenance device 8 to move and position near the machine base. The primary tilting device 8-3 and the secondary tilting device 8-5 can use hydraulic cylinders, pneumatic cylinders, or electric push rods as drive actuators.

[0037] When the high-pressure roller mill is operating normally, facing the front of the equipment, the left side frame 1 serves as the fixed roller side, and the right side frame 1 serves as the moving roller side. By installing a fixing pin 10 in the fixing pin hole at the lower part of the left side frame 1, the rotation of this side frame can be restricted to ensure the stability of the equipment operation. When the high-pressure roller mill is put into operation, the material enters the feeding device 7 from above, falls through the material channel onto the two opposing cylindrical working roller surfaces composed of multiple segmented rollers 4-2. The drive device 5 drives the two sets of working roller surfaces to rotate inwards relative to each other, generating high-pressure extrusion on the incoming material, causing the material to be crushed and discharged from below. The tensioning device 3 tensions the upper part connecting the two side frames 1 to resist the outward pushing force generated when the material is rolled, ensuring the required working pressure at the center between the two working roller surfaces.

[0038] When rapid maintenance of the high-pressure roller mill of this utility model is required, the steps of the following specific embodiments can be followed, in conjunction with the appendix. Figures 8-10 As shown: (1) such as Figure 1 , Figure 2 and Figure 6 As shown, when the equipment is shut down and the roller system 4 and the working roller surface composed of multiple segmented rollers 4-2 need to be inspected and replaced, firstly, the overturning inspection device 8 is moved to the designated position outside the side frame 1 and reliably connected and fixed to the machine base 2 through the support beam 8-1. At the same time, the fastening device of the adapter flange 6 is removed, and the connection between the shaft end flange 6-1 and the transmission end flange 6-3 is disconnected, so that the reducer 5-1 is quickly separated from the roller system 4, and the reducer 5-1 can be quickly removed.

[0039] (2) For example Figure 8 and Figure 9As shown, the secondary tilting device 8-5 on the tilting maintenance device 8 is activated, extending the telescopic rod of the secondary tilting device 8-5 and pushing the tilting frame 8-4 from a horizontal position towards the side frame 1 to tilt and raise it to an angle of approximately 48° to 52°. Subsequently, the primary tilting device 8-3 is activated, extending its telescopic rod. The joint bearing at the head of the telescopic rod is connected and fixed to the side frame 1 via a pin. The upper pin 9 above the side frame 1 and the lower fixing pin 10 are removed. Then, the telescopic rod of the primary tilting device 8-3 is retracted, causing the side frame 1 to tilt outwards around the main pin 11 on the machine base 2 until the side frame 1 is completely against the tilting frame 8-4. The tilting frame 8-4 is then fixed and locked to the side frame 1 using bolts or latches, completing the first tilt.

[0040] (3) such as Figure 9 and Figure 10 As shown, disassemble the main pin shaft 11 to release the hinge connection between the side frame 1 and the base 2. Then, retract the telescopic rod of the secondary flipping device 8-5, which will drive the flipping frame 8-4 together with the side frame 1 to continue to flip outward to a horizontal position around the hinge point on the movable base 8-2, completing the second flipping.

[0041] (4) such as Figure 10 As shown, after the above steps (1) to (3), the roller system 4 and the split roller 4-2, which were originally located inside the middle of the high-pressure roller mill, have been rotated and unfolded to the outside of the equipment along with the side frame. At this time, a spacious maintenance space is formed on the upper part of the roller system 4, and the internal parts of the equipment are fully exposed, which provides the conditions for maintenance and replacement.

[0042] (5) such as Figure 3 , Figure 4 and Figure 10 As shown, when inspecting and replacing the segmented roller 4-2, transition wear-resistant strip 4-4, and stud 4-6, it is only necessary to remove the fastening bolt 4-3 corresponding to the part to be replaced above the unfolded working surface to remove the corresponding part and replace it with a new one.

[0043] (6) For example Figure 10 As shown, when the entire roller system 4 needs to be inspected and replaced, it is only necessary to remove the connecting bolts and bearing half-caps at the bearing of the roller system 4 above the unfolded working surface to disassemble and replace the entire roller system 4.

[0044] (7) If the equipment is not available for on-site maintenance and replacement, the side frame 1 and roller system 4 can be transported to a suitable work position for maintenance and replacement by utilizing the movable function of the overturning maintenance device 8.

[0045] (8) After the maintenance and replacement are completed, the above steps (3) to (1) are performed in reverse order to reset the side frame 1 and the roller system 4 and complete the reassembly, restoring the normal working state of the high pressure roller mill.

[0046] Due to the adoption of the above technical solutions, this utility model has significant beneficial effects: The dedicated adapter flange structure allows for quick disassembly or installation of the reducer and the main shaft of the high-pressure roller mill, ensuring reliable centering and reducing the debugging time for connecting the reducer and the main shaft by more than 60%; By integrating a tilting maintenance device into the equipment, the side frame and roller system can be quickly unfolded outwards, creating a spacious maintenance space above the roller system. Combined with the segmented roller structure, this enables online replacement of single or multiple rollers, saving more than 50% of maintenance time compared to traditional methods, and eliminating the need for a spare main shaft, thus reducing spare parts costs; The segmented roller structure also reduces the lifting capacity requirements of the high-pressure roller mill, especially for large high-pressure roller mills, significantly reducing investment in infrastructure and equipment such as factory buildings and cranes; Furthermore, the clearance fit design between the studs and holes on the segmented roller allows for individual online replacement of the studs, further improving the flexibility of roller surface maintenance and extending the service life of the segmented roller.

[0047] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A high-pressure roller mill with rapid maintenance function, comprising two opposing side frames (1), characterized in that: The lower parts of the two side frames (1) are hinged to the base (2), and the upper sides of the two side frames (1) are connected to each other by a tensioning device (3); the two roller systems (4) are respectively set inside the two side frames (1), and a material flow channel is formed between the two roller systems (4), and a feeding device (7) is provided above the channel; each roller system (4) includes a main shaft (4-1) and multiple segmented rollers (4-2), the segmented rollers (4-2) are fixed on the main shaft (4-1), and are combined into a cylindrical working roller surface along the circumferential direction of the main shaft (4-1); both roller systems (4) are connected to the drive device (5).

2. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: The drive device (5) includes a reducer, a universal coupling (5-2) and a motor (5-3). The output shaft of the motor (5-3) is connected to the input shaft of the reducer via the universal coupling (5-2). Each drive device (5) can drive the roller system (4) connected to it to rotate. The transition flange (6) is connected between the reducer and the main shaft (4-1) of the roller system (4). It consists of a shaft end flange (6-1), a cross key (6-2) and a transmission end flange (6-3). The shaft end flange (6-1) is fixed at the input end of the main shaft (4-1) of the roller system (4) and the locating flange (6-1) is concentric with the main shaft (4-1) through a stop. The transmission end flange (6-3) is fixed at the output end of the reducer. The cross key (6-2) passes through the main shaft (4-1), the shaft end flange (6-1) and the transmission end flange (6-3), connecting the three together.

3. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: A flipping maintenance device (8) is provided on the outside of the side frame (1). The flipping maintenance device (8) includes a movable base (8-2), a flipping frame (8-4), a primary flipping device (8-3), a secondary flipping device (8-5), and a support beam (8-1). The movable base (8-2) is connected to the machine base (2) through the support beam (8-1). The flipping frame (8-4) is hinged on the movable base (8-2). The two ends of the primary flipping device (8-3) are respectively connected to the flipping frame (8-4) and the side frame (1). The two ends of the secondary flipping device (8-5) are respectively connected to the movable base (8-2) and the flipping frame (8-4). The flipping frame (8-4) is installed on the side frame (1) through a fixing device (8-6).

4. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: A transition wear-resistant strip (4-4) is provided between adjacent segmented rollers (4-2), and the transition wear-resistant strip (4-4) is made of tungsten carbide powder metallurgy material; holes for installing studs (4-6) are provided on the segmented rollers (4-2), and the studs (4-6) and the holes are clearance fit, with a clearance of 0.04 to 0.07 mm on one side.

5. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: The side frame (1) is an integral frame structure that can be rotated around the detachable main pin (11) mounted on the base (2).

6. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: The base (2) is provided with a main pin (11) hole and a fixed pin (10) hole on both the left and right sides; the main pin (11) hole is used to install the main pin (11) as the hinge point for the flipping of the side frame (1); the fixed pin (10) hole is used to install the fixed pin (10) to restrict the flipping of the side frame (1).

7. A high-pressure roller mill with rapid maintenance function according to claim 1, characterized in that: The main shaft (4-1) of the roller system (4) is provided with a stop, threaded hole and keyway structure at the shaft end, and is connected to the drive device (5) through a detachable adapter flange (6).

8. A high-pressure roller mill with rapid maintenance function according to claim 3, characterized in that: The movable base (8-2) is provided with multiple sets of rollers at its lower part, and one or two sets of rollers serve as drive wheels, powered by a motor (5-3) or a hydraulic motor; the primary flipping device (8-3) and the secondary flipping device (8-5) are hydraulic cylinders, pneumatic cylinders or electric push rods.

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