Novel vertical rolling mill

Abstract

The utility model provides a novel vertical rolling mill, which relates to the technical field of rolling mills, and comprises a rolling mill stand, and further comprises mounting brackets, a main motor, a connecting shaft lifting cylinder, a main speed reducer, a lifting piece, a telescopic connecting shaft and a roller system which are symmetrically arranged along the central axis of the rolling mill stand, the main motor is arranged on the side portion of the rolling mill rack through an installation support, the main speed reducer is arranged on the top of the rolling mill rack, the output end of the main motor is connected with the input end of the main speed reducer, the output end of the main speed reducer is connected with one end of the telescopic connecting shaft, and the other end of the telescopic connecting shaft is connected with the output end of the rolling mill rack. The other end of the telescopic connecting shaft is connected with the roller system, and the roller system is arranged on the rolling mill rack in a sliding mode and abuts against the extending end of an AWC hydraulic cylinder fixedly installed on the rolling mill rack. The device has the advantages of being stable in structure and small in total weight.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill technology, and more specifically, to a novel vertical rolling mill. Background Technology

[0002] A vertical roll mill is a device used to roll slabs in the width direction to control the edge quality of the slabs.

[0003] Common vertical rolling mills, such as roughing vertical rolling mills, have main drive structures with either a side-mounted main motor or a top-mounted main motor. The former is more stable, but its structure is complex and heavy due to the main reducer having its own connecting shaft balancing hydraulic cylinder, resulting in a large overall weight of the equipment. The latter, with its top-mounted motor, has a higher overall height, which reduces the structural stability of the equipment. Utility Model Content

[0004] The problem this invention aims to solve is how to balance structural stability and low overall equipment weight.

[0005] To address the aforementioned problems, in a first aspect, this utility model provides a novel vertical roll mill, comprising a mill stand, and further comprising a mounting bracket symmetrically arranged along the central axis of the mill stand, a main motor, a shaft lifting cylinder, a main reducer, a lifting component, a retractable shaft, and a roll system. The main motor is mounted on the mill stand via the mounting bracket. The shaft lifting cylinder, the lifting component, and the retractable shaft are located inside the mounting bracket. The main reducer is located at the top of the mounting bracket. The output end of the main motor is connected to the input end of the main reducer. The output end of the main reducer is connected to one end of the retractable shaft. The other end of the retractable shaft is connected to the roll system. The roll system is slidably disposed on the mill stand and abuts against the extended end of an AWC hydraulic cylinder fixedly mounted on the mill stand. The shaft lifting cylinder is fixed relative to the mill stand and vertically arranged, and the extended end of the shaft lifting cylinder is fixedly connected to the lifting component. The other end of the retractable shaft is disposed on the stroke trajectory of the lifting component.

[0006] Optionally, the retractable connecting shaft includes a connecting shaft body, an upper shaft head, and a lower shaft head that are rotatably connected in sequence. The upper shaft head is connected to the output end of the main reducer, and the lower shaft head is connected to the roll drive of the roll system. A connecting shaft flange is fixed on the connecting shaft body, and the connecting shaft flange is arranged on the stroke trajectory of the lifting member.

[0007] Optionally, the shaft lifting cylinder is mounted on the mounting bracket.

[0008] Optionally, the lifting component includes a slider, a base, and a fork. The base is fixedly connected to the extended end of the connecting shaft lifting cylinder. The slider and the fork are respectively fixed to both ends of the base. The slider is slidably connected to the mounting bracket. The connecting shaft flange is disposed on the stroke trajectory of the fork.

[0009] The flange is located near the lower shaft head.

[0010] Optionally, the fork head has a fork-shaped structure. Along the transmission direction of the connecting shaft body, the fork head is located below the connecting shaft flange, and its fork opening dimension is greater than the shaft diameter of the connecting shaft body below the connecting shaft flange, but smaller than the diameter of the connecting shaft flange.

[0011] Optionally, the mounting bracket is provided with a sliding groove, and the slider slides in cooperation with the sliding groove.

[0012] Optionally, a roll sleeve is fixedly connected to the lower shaft head, and the roll sleeve covers the rolls of the roll system.

[0013] Optionally, the fork head is provided with an elastic protective pad on the side near the connecting flange.

[0014] In this invention, the main motor is mounted on the mill frame via a mounting bracket, and the main reducer is mounted on top of the mounting bracket, meaning the main motor is positioned on the side of the bottom of the main reducer (corresponding to the lower side of the main reducer in the figure). This means the main motor is positioned sideways relative to the roll system. Compared to the method of sequentially mounting the main reducer and main motor above the roll system, the center of gravity of the equipment in this embodiment is lowered, resulting in a more stable structure. Furthermore, in this embodiment, a telescopic connecting shaft is provided. The output end of the main reducer is connected to one end of the telescopic connecting shaft, and the other end of the telescopic connecting shaft is connected to the roll system. The roll system is slidably mounted on the mill frame and abuts against the extended end of the AWC hydraulic cylinder fixedly mounted on the mill frame. Therefore, when adjusting the roll opening degree of the roll system via the AWC hydraulic cylinder, the telescopic connecting shaft can adaptively extend and retract, facilitating the adjustment of the opening degree. Further, since the connecting shaft is fixedly mounted relative to the mill frame... The lifting cylinder has a lifting member fixedly connected to its extended end. The other end of the retractable connecting shaft is positioned on the stroke trajectory of the lifting member. Therefore, when the rolls of the rolling mill rotate, it is not necessary to connect the retractable connecting shaft to the lifting member, nor is it necessary to activate the lifting function of the connecting shaft lifting cylinder. When changing the retractable connecting shaft or changing rolls, the lifting member is retracted by activating the connecting shaft lifting cylinder. This retraction of the lifting member lifts the retractable connecting shaft to its shortest length. After the retractable connecting shaft and the rolling mill are disconnected, it is ensured that the other end of the retractable connecting shaft is disengaged from the connection position with the rolling mill, thereby allowing for the replacement of the retractable connecting shaft and / or rolls. Therefore, the hydraulic system of the connecting shaft lifting cylinder does not require backup pressure follow-up, and the main reducer does not need to have a hydraulic lifting device, resulting in a simpler structure and a relatively smaller overall weight. Compared with the prior art where the main reducer has a built-in hydraulic lifting device, the overall height of the vertical roll mill of this invention is also reduced, further improving equipment stability. Attached Figure Description

[0015] Figure 1 This illustration shows the main structural schematic of a novel vertical roll mill according to an embodiment of the present invention;

[0016] Figure 2 This illustration shows a partial structural design excluding the roll system in an embodiment of the present invention.

[0017] Figure 3 An embodiment of the present invention is shown. Figure 1 A partially enlarged structural diagram;

[0018] Figure 4 This diagram illustrates the structural arrangement of the lifting component and the connecting flange in an embodiment of the present invention.

[0019] Figure 5An enlarged structural schematic diagram of the AWC hydraulic cylinder and bearing housing in an embodiment of this utility model is shown;

[0020] Figure 6 This diagram illustrates the structure of the balanced hydraulic cylinder in an embodiment of the present invention, which is achieved through the cooperation of a bracket and a bearing seat.

[0021] Figure 7 A schematic diagram of the connection between the balance hydraulic cylinder and the bracket in an embodiment of this utility model is shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Mill stand; 2. Mounting bracket; 3. Main motor; 4. Shaft lifting cylinder; 5. Coupling; 6. Main reducer; 7. Lifting component; 71. Slider; 72. Base; 73. Fork head; 8. Telescopic shaft; 81. Shaft body; 811. Shaft flange; 82. Upper shaft head; 83. Lower shaft head; 9. Bearing housing; 10. AWC hydraulic cylinder; 11. Balance hydraulic cylinder; 12. Roll system; 13. Roll sleeve; 14. Slide groove; 15. Mounting part; 16. Bracket; 17. Guide rod; 18. Stop assembly. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] It should be noted that relational terms such as "first" and "second" in this utility model are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0027] Reference Figure 1 As shown in the figure, this utility model embodiment proposes a novel vertical roll mill, including a mill stand 1, and further including a mounting bracket 2, a main motor 3, a shaft lifting cylinder 4, a main reducer 6, a lifting component 7, a telescopic connecting shaft 8, and a roll system 12, all symmetrically arranged along the central axis of the mill stand 1. The main motor 3 is mounted on the mill stand 1 via the mounting bracket 2. The shaft lifting cylinder 4, the lifting component 7, and the telescopic connecting shaft 8 are located inside the mounting bracket 2. The main reducer 6 is located at the top of the mounting bracket 2, and the output end of the main motor 3 is connected to the input end of the main reducer 6. The output end of the speed machine 6 is connected to one end of the retractable connecting shaft 8, and the other end of the retractable connecting shaft 8 is connected to the roll system 12. The roll system 12 is slidably disposed on the mill frame 1 and abuts against the extended end of the AWC hydraulic cylinder 10 fixedly installed on the mill frame 1. The connecting shaft lifting cylinder 4 is fixed relative to the mill frame 1 and is vertically disposed, and the extended end of the connecting shaft lifting cylinder 4 is fixedly connected to the lifting member 7. The other end of the retractable connecting shaft 8 is disposed on the stroke trajectory of the lifting member 7, so that the other end of the retractable connecting shaft 8 is disengaged from the connection position with the roll system 12.

[0028] Specifically, a pair of components are provided for mounting bracket 2, main motor 3, connecting shaft lifting cylinder 4, main reducer 6, lifting component 7, telescopic connecting shaft 8, and roll system 12, and in... Figure 1 The rolls are symmetrically arranged on the left and right sides along the central axis, corresponding to the vertically arranged rolls on the left and right sides respectively. An opening (i.e., the distance between the roll grooves of the two rolls) is formed between the two rolls. During operation, the power of the main motor 3 is input to the main reducer 6 through the coupling 5, and then output from the output end of the main reducer 6 through the speed change of the main reducer 6. This power is then transmitted to the roll system 12 via the telescopic connecting shaft 8, driving the rolls of the roll system 12 to rotate, thereby achieving torque transmission. Additionally, the AWC hydraulic cylinder 10 is used for horizontal rolling. The AWC hydraulic cylinder 10 directly contacts the end face of the bearing housing 9, applying a rolling force towards the rolling center (i.e., the centerline of the mill stand 1) to the bearing housing 9. The opening is adjusted first, and then the rolling force is applied. The rolls are installed inside the bearing housing 9 (e.g., ...). Figure 5 (As shown).

[0029] In practical application, compared to existing technologies, this embodiment features a main motor 3 mounted on the rolling mill frame 1 via a mounting bracket 2, and a main reducer 6 positioned on top of the mounting bracket 2, meaning the main motor 3 is located on the side of the bottom of the main reducer 6 (corresponding to...). Figure 1 The main reducer 6 is located on the lower side, meaning the main motor 3 is positioned sideways relative to the roll system 12. Compared to the method of sequentially placing the main reducer 6 and the main motor 3 above the roll system 12, the center of gravity of the equipment in this embodiment is lowered, thus making its structure more stable. Correspondingly, in this embodiment, a telescopic connecting shaft 8 is provided. The output end of the main reducer 6 is connected to one end of the telescopic connecting shaft 8, and the other end of the telescopic connecting shaft 8 is connected to the roll system 12. The roll system 12 is slidably mounted on the mill frame 1 and abuts against the extended end of the AWC hydraulic cylinder 10 fixedly installed on the mill frame 1. Therefore, when adjusting the opening degree of the rolls in the roll system 12 via the AWC hydraulic cylinder 10, the telescopic connecting shaft 8 can adaptively extend and retract, facilitating the adjustment of the opening degree. Furthermore, since the connecting shaft lifting cylinder 4 is fixedly mounted relative to the mill frame 1, and its extended end is fixedly connected to the lifting member 7, the other end of the telescopic connecting shaft 8... The end is set on the travel trajectory of the lifting member 7. Therefore, when the rolls of the roll system 12 rotate, it is not necessary to connect the telescopic connecting shaft 8 to the lifting member 7, nor is it necessary to activate the lifting function of the connecting shaft lifting cylinder 4. When replacing the telescopic connecting shaft 8 and changing the roll, the lifting member 7 is driven to retract by activating the connecting shaft lifting cylinder 4. Thus, the telescopic connecting shaft 8 can be lifted by the retraction of the lifting member 7, so that it can be retracted to its shortest length. After the telescopic connecting shaft 8 and the roll system 12 are disconnected, it can be ensured that the other end of the telescopic connecting shaft 8 is disconnected from the connection position of the roll system 12, thereby replacing the telescopic connecting shaft 8 and / or the roll. Therefore, the hydraulic system of the connecting shaft lifting cylinder 4 does not need to be backed up and followed, and the main reducer 6 does not need to be equipped with a hydraulic lifting device, so its structure is simpler and the overall weight is relatively smaller. Compared with the prior art where the main reducer is equipped with a hydraulic lifting device, the total height of the vertical roll mill of the present invention is also reduced, further improving the stability of the equipment.

[0030] The main reducer in this invention has a simple structure, and the main motor bracket (mounting bracket 2) can be made as small as possible. Practical experience has proven that the structural design of this invention is reasonable, the operation is stable, the structure is compact, and the total weight of the equipment is small.

[0031] like Figure 1 and Figure 3As an optional embodiment of this utility model, the retractable connecting shaft 8 includes a connecting shaft body 81, an upper shaft head 82, and a lower shaft head 83 that are rotatably connected in sequence. The upper shaft head 82 is connected to the output end of the main reducer 6, and the lower shaft head 83 is fixedly connected to the roll sleeve 13. The roll sleeve 13 covers the rolls of the roll system 12. A connecting shaft flange 811 is fixed on the connecting shaft body 81. The connecting shaft flange 811 is arranged on the stroke trajectory of the lifting member 7. The connecting shaft flange 811 is lifted by the lifting member 7 to achieve the lifting of the connecting shaft.

[0032] Specifically, the telescopic connecting shaft 8, as a connecting shaft, mainly undertakes the function of transmitting the torque output of the main reducer 6 to the roll system 12. The lifting member 7 is located below the connecting shaft flange 811 of the telescopic connecting shaft 8. The connecting shaft lifting cylinder 4 drives the lifting member 7 to move upward, and the length of the telescopic connecting shaft 8 will become shorter. Thus, during operation, the telescopic connecting shaft 8 extends and retracts with the opening degree under its own weight, and its length is variable. At this time, it is not necessary to start the lifting function. When changing the telescopic connecting shaft 8 and / or changing the roll (roll), because the upper space is limited, it is necessary to raise the length of the telescopic connecting shaft 8 to shorten it to the shortest length, so as to ensure that the telescopic connecting shaft 8 can be completely disengaged from the roll.

[0033] As an optional embodiment of this utility model, the output shaft of the main motor 3 is connected to the input end of the main reducer 6 through a coupling 5, thereby inputting power into the main reducer 6. The coupling 5 is preferably a drum-shaped gear coupling.

[0034] As an optional embodiment of this utility model, the shaft lifting cylinder 4 is mounted on the mounting bracket 2.

[0035] In practical application, the shaft lifting cylinder 4 can be externally mounted. Preferably, the shaft lifting cylinder 4 is mounted on the mounting bracket 2 nearby and can be mounted on the side of the rolling mill frame 1. This eliminates the need for a separate bracket to mount the shaft lifting cylinder 4 and facilitates subsequent guidance of the movement of the lifting component 7.

[0036] like Figure 2 and Figure 3 As shown, in an optional embodiment of the present invention, the lifting member 7 includes a slider 71, a base 72 and a fork 73. The base 72 is fixedly connected to the extended end of the connecting shaft lifting cylinder 4. The slider 71 and the fork 73 are respectively fixed to the two ends of the base 72. The slider 71 is slidably connected to the mounting bracket 2. The connecting shaft flange 811 is arranged on the lifting stroke trajectory of the fork 73.

[0037] In practical applications, this embodiment, such as Figure 4As shown, from left to right are slider 71, base 72 and fork 73. Slider 71 can guide linear motion, base 72 is a connecting part fixed to the extended end of the connecting shaft lifting cylinder 4, and fork 73 is a part that supports the movement of connecting shaft flange 811. This satisfies the requirement that the retractable connecting shaft 8 is driven to retract by the connecting shaft lifting cylinder 4, so as to realize the lifting of the retractable connecting shaft 8. The lifting function can be activated when changing rollers and / or changing connecting shafts.

[0038] The connecting flange 811 is located close to the lower shaft head 83, so that the telescopic connecting shaft 8 can be lifted directly from the position close to the lower shaft head 83.

[0039] like Figure 3 and Figure 4 As shown, in an optional embodiment of the present invention, the fork head 73 is a fork-shaped structure. The fork head 73 of the fork-shaped structure is disposed below the connecting flange 811 of the connecting shaft body, and the fork opening size is larger than the diameter of the shaft body below the connecting flange 811, but smaller than the diameter of the connecting flange 811.

[0040] The lifting component 7 is located below the connecting flange 811 of the connecting shaft body. During normal operation, the connecting shaft rotates within the fork of the lifting component 7, and the fork does not need to move. The opening size of the fork is between the diameter of the shaft body and the diameter of the connecting flange 811. When changing rollers or connecting shafts, after adjusting the verticality of the telescopic connecting shaft 8, the lifting cylinder pulls the fork, which can lift the connecting flange 811, thereby realizing the telescopic extension of the connecting shaft.

[0041] like Figure 3 As shown, in an optional embodiment of the present invention, the mounting bracket 2 is provided with a sliding groove 14, and the slider 71 slides in cooperation with the sliding groove 14.

[0042] In practical application, the slider 71 cooperates with the groove 14 opened on the mounting bracket 2, so that when the lifting member 7 moves linearly with the extended end of the connecting shaft lifting cylinder 4, the slider 71 slides in the groove 14 to guide the linear movement of the lifting member 7.

[0043] like Figure 2 , Figure 3 As shown, in an optional embodiment of the present invention, the rolls of the roll system 12 pass through the upper and lower bearing seats 9 and are suspended from the mill frame 1 by wheels or sliders on the bearing seats 9. The bearing seats 9 are in contact with the extended end of the AWC hydraulic cylinder 10. A roll sleeve 13 is sleeved on the top of the rolls and the roll sleeve 13 is fixedly connected to the lower shaft head 83.

[0044] In practical application, the top of the roll is provided with a roll sleeve 13. The roll and the roll sleeve 13 are connected by a shaft hole (the shaft sleeve is set inside the roll sleeve 13 and can rotate together). The top of the roll sleeve 13 is connected to the lower shaft head 83 so that the roll gap opening (i.e. the distance between the roll grooves of the two rolls) can be adapted to the size of the roll gap opening while transmitting power.

[0045] like Figure 5 In addition, each roll is equipped with an AWC hydraulic cylinder 10 at the upper and lower bearings. The AWC hydraulic cylinder 10 is fixedly installed on the mill stand 1. As mentioned above, during rolling, the AWC hydraulic cylinder 10 applies a rolling force toward the center. The extended end of the AWC hydraulic cylinder 10 acts on the end face of the bearing seat 9 through the connecting assembly. The bearing seat 9 is slidably installed on the mill stand 1. The connecting assembly can be a spherical pad. The AWC hydraulic cylinder 10 is equipped with a displacement sensor, which measures the size of the roll gap opening and feeds it back to the electrical control system. That is, a total of 4 AWC hydraulic cylinders 10 can be provided.

[0046] like Figure 6 and Figure 7 In addition, a balancing hydraulic cylinder 11 is provided between every two AWC hydraulic cylinders 10. The balancing hydraulic cylinder 11 is also fixedly mounted on the rolling mill stand 1. The cylinder head of the balancing hydraulic cylinder 11 is connected to the bearing seat 9 through a bracket 16. The balancing hydraulic cylinder 11 can apply a balancing force to the bearing seat 9 through the bracket 16 to adjust the gap between parts during the roll opening adjustment process, improve the rolling effect, and pull back the bearing seat 9. The balancing hydraulic cylinder 11 is fixed on the rolling mill stand 1, and its extended end is connected to the bracket 16. By pulling the bracket 16, the gap between the bearing seat 9 and the cylinder head of the AWC hydraulic cylinder 10 is eliminated. Both the rolling force and the balancing force act on the bearing seat 9.

[0047] like Figure 6 and Figure 7 Like bearing housing 9, bracket 16 rests on mill stand 1 via wheels or sliders. The bracket 16 and bearing housing 9 are fitted with a groove (or stop).

[0048] Specifically, the bearing housing 9 and the bracket 16 are connected by a stop assembly 18. The stop assembly 18 includes a locking hook 1 set on the bearing housing 9 and a locking hook 2 set on the bracket 16. The locking hook 1 and the locking hook 2 are engaged with each other. A guide rod 17 is also fixed on the bracket 16. The guide rod 17 is slidably connected to the mill frame 1 to improve the effect of the balance hydraulic cylinder 11.

[0049] like Figure 3 As shown, in an optional embodiment of this utility model, the extended end of the connecting shaft lifting cylinder 4 is detachably connected to the base 72 via the mounting part 15.

[0050] In practical application, the mounting part 15 can be a U-shaped structure with the opening of the U-shaped structure facing the extended end of the connecting shaft lifting cylinder 4. The extended end extends into the opening of the U-shaped structure, and the two are fixed by a pin. The bottom of the U-shaped structure is fixed to the base 72. By removing the pin, the lifting part 7 and the mounting part 15 can be disassembled, which makes it easier to replace the lifting part 7.

[0051] As an optional embodiment of this utility model, the fork head 73 is provided with an elastic protective pad on the side near the connecting flange 811.

[0052] In practical application, this embodiment provides an elastic protective pad on the side of the fork head 73 near the connecting flange 811. The elastic protective pad (not shown in the figure) can be made of elastic material, such as silicone material, which can prevent hard collision between the fork head 73 and the connecting flange 811, thereby protecting the fork head 73 and the connecting flange 811.

[0053] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

[0054] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A new vertical roll mill characterized in that, The rolling mill stand (1) comprises a mounting bracket (2), a main motor (3), an arbor lifting cylinder (4), a main speed reducer (6), a lifting piece (7), a telescopic arbor (8) and a roller system (12) which are symmetrically arranged along the central axis of the rolling mill stand (1), the main motor (3) is mounted on the rolling mill stand (1) through the mounting bracket (2), the arbor lifting cylinder (4), the lifting piece (7) and the telescopic arbor (8) are located inside the mounting bracket (2), the main speed reducer (6) is arranged at the top of the mounting bracket (2), the output end of the main motor (3) is connected with the input end of the main speed reducer (6), the output end of the main speed reducer (6) is connected with one end of the telescopic arbor (8), the other end of the telescopic arbor (8) is connected with the roller system (12), the roller system (12) is slidingly arranged on the rolling mill stand (1) and abuts against the extending end of the AWC hydraulic cylinder (10) fixedly arranged on the rolling mill stand (1), the arbor lifting cylinder (4) is fixed relative to the rolling mill stand (1) and vertically arranged, and the extending end of the arbor lifting cylinder (4) is fixedly connected with the lifting piece (7), and the other end of the telescopic arbor (8) is arranged on the stroke track of the lifting piece (7).

2. The new vertical roll mill according to claim 1, characterized in that, The telescopic arbor (8) comprises an arbor body (81), an upper shaft head (82) and a lower shaft head (83) which are rotationally connected in sequence, the upper shaft head (82) is connected with the output end of the main speed reducer (6), the lower shaft head (83) is drivingly connected with the roller of the roller system (12), and the arbor flange (811) is fixedly arranged on the telescopic arbor (8).

3. The new vertical roll mill according to claim 2, characterized in that, The arbor lifting cylinder (4) is mounted on the mounting bracket (2).

4. The new vertical roll mill according to claim 2, characterized in that, The lifting piece (7) comprises a sliding block (71), a base body (72) and a fork head (73), the base body (72) is fixedly connected with the extending end of the arbor lifting cylinder (4), the sliding block (71) and the fork head (73) are respectively fixed on both ends of the base body (72), the sliding block (71) is slidingly connected with the mounting bracket (2), and the arbor flange (811) is arranged on the stroke track of the fork head (73).

5. The new vertical roll mill according to claim 4, characterized in that, The position of the arbor flange (811) is close to the lower shaft head (83).

6. A new vertical roll mill according to claim 4 or 5, characterized in that, The fork head (73) is in a fork structure, and along the transmission direction of the arbor body (81), the fork head (73) is arranged below the arbor flange (811), the fork opening size of the fork head (73) is greater than the shaft diameter of the arbor body (81) below the arbor flange (811) and is less than the diameter of the arbor flange (811).

7. A new vertical roll mill according to claim 4 or 5, characterized in that, A sliding groove (14) is formed in the mounting bracket (2), and the sliding block (71) is slidingly matched with the sliding groove (14).

8. The new vertical roll mill according to claim 2, characterized in that, The lower shaft head (83) is fixedly connected with a roller sleeve (13), and the roller sleeve (13) sleeves the roller of the roller system (12).

9. A new vertical roll mill according to any one of claims 4 or 5, characterized in that, The extension end of the kingpin lifting cylinder (4) is detachably connected with the base body (72) through a mounting portion (15).

10. The new vertical roll mill according to claim 4, characterized in that, The fork head (73) is provided with an elastic protective pad on the side close to the kingpin flange (811).

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