Cylinder assembly for guide roller of rolling mill

Abstract

The utility model provides an air cylinder assembly for a material guide roller of a rolling mill. The air cylinder assembly comprises an air cylinder body, an anti-vibration assembly and a sealing assembly. A piston rod which ascends and descends in the vertical direction is slidably arranged in the cylinder body in a penetrating manner; the anti-seismic assembly comprises an anti-seismic base, and the anti-seismic base is connected to the bottom of the air cylinder body and fixedly connected with the ground. The sealing assembly is arranged on the piston rod in a sleeving mode and used for blocking a gap between the piston rod and the air cylinder body. According to the air cylinder assembly for the material guiding roller of the rolling mill, the sealing assembly is additionally arranged between the piston rod and the air cylinder body, a gap between the air cylinder body and the piston rod is blocked, water vapor in the environment is prevented from entering the air cylinder body, and the service life of the air cylinder body is prolonged; the part, exposed in the environment, of the piston rod makes contact with water to generate rust, when the piston rod retreats from the air cylinder body, the sealing assembly forcibly peels off the rust on the periphery of the piston rod, the rust is prevented from entering the air cylinder body, and the fault occurrence rate is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rolling equipment, and particularly relates to a cylinder assembly for a mill charging roller. Background Art

[0002] The charging roller, also known as the pinch roll, is arranged at the entrance of the coiler. Its main functions include introducing the head of the strip into the entrance guide plate of the coiler to ensure that the strip can smoothly enter the entrance of the coiler; when the tail end of the strip is thrown out of the finishing mill, applying the required tension to the strip, and obtaining a good coil shape by horizontally adjusting the pinch roll. Generally, the charging roller of the mill is adjusted in height by a cylinder assembly for the mill charging roller installed on the ground.

[0003] When the cylinder assembly for the mill charging roller works, it is greatly affected by the working environment. In an environment with a large amount of water vapor, the water vapor will enter the interior of the cylinder, corrode the piston rod and the interior of the cylinder, affect the normal operation of the cylinder, cause the cylinder to vibrate due to corrosion, and the cylinder is easily damaged during operation. The cylinder needs to be frequently replaced within a production cycle, which seriously affects the work efficiency. A large number of cylinders need to be purchased or produced, increasing the production cost, and the frequent replacement of the cylinder increases the labor intensity of the employees. Summary of the Utility Model

[0004] An embodiment of the utility model provides a cylinder assembly for a mill charging roller, aiming to solve the technical problems in the prior art that excessive water vapor in the environment causes the piston rod to be corroded, the frequent replacement of the cylinder affects the production cost and the work efficiency.

[0005] To achieve the above object, the technical solution adopted by the utility model is:

[0006] Provide a cylinder assembly for a mill charging roller, including:

[0007] A cylinder body, inside which a piston rod that moves up and down along the vertical direction is slidably inserted;

[0008] An earthquake-resistant assembly, including an earthquake-resistant seat, the earthquake-resistant seat is connected to the bottom of the cylinder body and fixedly connected to the ground; and

[0009] A sealing assembly, sleeved on the piston rod, for sealing the gap between the piston rod and the cylinder body.

[0010] In a possible implementation manner, the earthquake-resistant assembly further includes:

[0011] A shock-absorbing column, erected on the top of the earthquake-resistant seat;

[0012] A shock-absorbing tube, arranged at the bottom of the cylinder body and inserted into and cooperated with the shock-absorbing column up and down; and

[0013] An elastic member is sleeved on the outer peripheries of the shock-absorbing column and the shock-absorbing tube, and two ends of the elastic member are respectively connected to the bottom of the cylinder body and the anti-seismic seat.

[0014] In a possible implementation manner, the sealing assembly includes:

[0015] A sealing housing with an open bottom, a perforation is provided in the middle of the sealing housing, and the perforation is in sliding fit with the piston rod;

[0016] A first sealing ring is arranged inside the sealing housing and is coaxially arranged with the piston rod, and the inner ring of the first sealing ring is in sliding fit with the piston rod; and

[0017] A second sealing ring is arranged inside the sealing housing and is coaxially arranged below the first sealing ring, and the second sealing ring is in sealing abutment with the top of the cylinder body.

[0018] In a possible implementation manner, the top surface of the first sealing ring is divided into a first annular surface and a second annular surface from the inside, the first annular surface is flush with the top end surface of the sealing housing, and the inner ring edge of the first annular surface is in contact with the piston rod, and the second annular surface is gradually inclined outward from top to bottom and abuts against the inner wall of the sealing housing.

[0019] In a possible implementation manner, the bottom surface of the second sealing ring forms an inverted V-shaped sealing groove;

[0020] A limiting retaining ring is provided at the top of the cylinder body, the limiting retaining ring is coaxially arranged with the piston rod, and the limiting retaining ring can be inserted into and cooperated with the sealing groove up and down.

[0021] In a possible implementation manner, an external thread is provided on the outer periphery of the top of the cylinder body, and an internal thread corresponding to the external thread is provided on the inner wall of the bottom of the sealing housing, and the external thread is in threaded fit with the internal thread.

[0022] In a possible implementation manner, a fireproof ring is provided on the upper side of the sealing housing.

[0023] In a possible implementation manner, a connecting plate is provided at the top of the piston rod, the plate surface of the connecting plate is perpendicular to the horizontal direction, and a mounting hole is formed in the connecting plate, and the mounting hole is used for connecting with a material guiding roller.

[0024] In a possible implementation manner, the cylinder assembly for the mill material guiding roller further includes a fixing frame, and the fixing frame is fixedly connected to the ground; the cylinder body is installed inside the fixing frame, and a reinforcing ring is provided on the outer periphery of the cylinder body, and the reinforcing ring is detachably connected to the fixing frame.

[0025] In a possible implementation, a piston plate is provided at the bottom of the piston rod. The piston plate divides the interior of the cylinder body into a first chamber and a second chamber from top to bottom. The piston rod is disposed in the first chamber, and the second chamber is used to push the piston plate upward. A boss is formed at the bottom of the second chamber.

[0026] A U-shaped buffer channel is further opened at the bottom of the second chamber. One end of the buffer channel is communicated with the bottom of the second chamber, and the other end is communicated with the top of the boss.

[0027] Compared with the prior art, the cylinder assembly for the mill feeding roller provided by the present utility model adds a sealing component between the piston rod and the cylinder body to block the gap between the cylinder body and the piston rod, preventing water vapor in the environment from entering the cylinder body and affecting the normal operation of the cylinder body, thus prolonging the service life of the cylinder body; when the part of the piston rod exposed in the environment comes into contact with water and rusts, when the piston rod retracts into the cylinder body, the sealing component forcibly peels off the rust on the outer periphery of the piston rod, and the rust is blocked outside the cylinder body by the sealing component, preventing the rust from entering the cylinder body, reducing the failure rate, reducing the number of cylinder bodies used, and lowering the usage cost; a buffer seat is provided at the bottom of the cylinder body to offset the force directly applied to the ground by the cylinder body through the buffer seat, preventing the reaction force of the ground from damaging the cylinder body and the piston rod, and prolonging the service life of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0029] Figure 1 It is the front view structural schematic diagram of the cylinder assembly for the mill feeding roller provided in the first embodiment of the present utility model;

[0030] Figure 2 For Figure 1 the cross-sectional view of the sealing component used in

[0031] Figure 3 For Figure 2 the enlarged view of the first sealing ring in

[0032] Figure 4 For Figure 1 the assembly sectional view of the sealing component and the cylinder body in

[0033] Figure 5 For Figure 1Schematic diagram of the structure of the cylinder body adopted;

[0034] Figure 6 Assembly schematic diagram of the cylinder body and the fixing bracket adopted in the first embodiment of the present utility model;

[0035] Figure 7 is Figure 1 Assembly sectional view of the cylinder body and the buffer valve adopted;

[0036] Figure 8 Assembly sectional view of the cylinder body and the buffer valve adopted in the second embodiment of the present utility model;

[0037] Figure 9 Assembly schematic diagram of the cylinder body and the seismic component adopted in the second embodiment of the present utility model.

[0038] Explanation of the reference numerals in the drawings:

[0039] 1. Cylinder body; 11. Piston rod; 12. External thread; 13. Limit retaining ring; 14. Reinforcing ring; 15. Buffer ring groove; 16. Buffer channel; 17. Piston plate; 171. Piston protrusion;

[0040] 2. Seismic component; 21. Seismic base; 22. Shock-absorbing column; 23. Shock-absorbing tube; 24. Elastic member;

[0041] 3. Sealing component; 31. Sealing housing; 32. First sealing ring; 321. First ring surface; 322. Second ring surface; 33. Second sealing ring; 331. Sealing groove;

[0042] 4. Fireproof ring;

[0043] 5. Connecting plate; 51. Mounting hole;

[0044] 6. Fixing bracket. Detailed implementation manners

[0045] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0046] It should be noted that the orientation or positional relationship indicated by terms such as "length", "width", "height", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the utility model.

[0047] It should also be noted that unless otherwise clearly specified and defined, terms such as "install", "connect", "join", "fix", "set", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In addition, the meanings of "a plurality" and "several" are two or more, unless otherwise clearly and specifically defined.

[0049] Please refer to Figures 1 to 8 , and now the cylinder assembly for the mill feeding roller provided by the present utility model will be described. The cylinder assembly for the mill feeding roller includes a cylinder body 1, a shock-resistant assembly 2, and a sealing assembly 3. A piston rod 11 that moves up and down in the vertical direction is slidably inserted inside the cylinder body 1; the shock-resistant assembly 2 includes a shock-resistant seat 21, and the shock-resistant seat 21 is connected to the bottom of the cylinder body 1 and fixedly connected to the ground; the sealing assembly 3 is sleeved on the piston rod 11 and is used to seal the gap between the piston rod 11 and the cylinder body 1.

[0050] During specific implementation, the cylinder body 1 is forged from 27SiMn, and after annealing and rough machining, it is subjected to quenching and tempering treatment, with a hardness of HB250 - 280.

[0051] Compared with the prior art, the cylinder assembly for the mill loading roller provided in this embodiment is provided with a sealing assembly 3 between the piston rod 11 and the cylinder body 1 to block the gap between the cylinder body 1 and the piston rod 11, preventing water vapor in the environment from entering the cylinder body 1 and affecting the normal operation of the cylinder body 1, thus extending the service life of the cylinder body 1; when the part of the piston rod 11 exposed to the environment comes into contact with water and rusts, when the piston rod 11 retracts into the cylinder body 1, the sealing assembly 3 forcibly peels off the rust on the outer periphery of the piston rod 11, and the rust is blocked outside the cylinder body 1 by the sealing assembly 3, preventing the rust from entering the cylinder body 1, reducing the failure rate, reducing the number of cylinder bodies 1 used, and lowering the usage cost; a buffer seat is provided at the bottom of the cylinder body 1 to offset the force exerted by the cylinder body 1 directly on the ground through the buffer seat, preventing the reaction force of the ground from damaging the cylinder body 1 and the piston rod 11, and extending the service life of the cylinder body 1.

[0052] In some embodiments, referring to Figure 8 , the seismic component 2 further includes a shock-absorbing column 22, a shock-absorbing tube 23, and an elastic member 24. The shock-absorbing column 22 is erected on the top of the seismic seat 21; the shock-absorbing tube 23 is provided at the bottom of the cylinder body 1 and is inserted into and cooperated with the shock-absorbing column 22 up and down; the elastic member 24 is sleeved on the outer peripheries of the shock-absorbing column 22 and the shock-absorbing tube 23, and both ends of the elastic member 24 are respectively connected to the bottom of the cylinder body 1 and the seismic seat 21.

[0053] This embodiment provides an implementation manner of the seismic component 2. The elastic member 24, the shock-absorbing column 22, and the shock-absorbing tube 23 jointly support the cylinder body 1. When the loading roller connected to the piston rod 11 feeds the material, the loading roller exerts a downward force on the piston rod 11, and the piston rod 11 and the cylinder body 1 as a whole move downward. Due to the setting of the elastic member 24, the elastic member 24 is compressed by the force, offsetting the impact received by the cylinder body 1 and reducing the damage to the cylinder body 1. After the material feeding is completed, the elastic member 24 resumes its original state, driving the cylinder body 1 to reset. When the shock-absorbing column 22 is squeezed, it slides up and down with the shock-absorbing tube 23 to guide the telescopic direction of the elastic member 24, ensuring that the cylinder body 1 does not tilt and ensuring the normal use of the cylinder body 1.

[0054] Optionally, the elastic member 24 is selected as a helical spring. The spring has good deformation continuity, high elasticity, and certain strength, meeting the requirements for being the elastic member 24. The elastic member 24 can also be other components, such as a conical spring, as long as it can offset the force received by the cylinder body. They will not be listed one by one here.

[0055] In some embodiments, referring to Figure 2 and Figure 4, the sealing assembly 3 includes a sealing housing 31, a first sealing ring 32 and a second sealing ring 33. The bottom of the sealing housing 31 is open, and a perforation is provided in the middle of the sealing housing 31, and the perforation is slidably matched with the piston rod 11; the first sealing ring 32 is arranged inside the sealing housing 31 and is coaxially arranged with the piston rod 11, and the inner ring of the first sealing ring 32 is slidably matched with the piston rod 11; the second sealing ring 33 is arranged inside the sealing housing 31 and is coaxially arranged below the first sealing ring 32, and the second sealing ring 33 is in sealing contact with the top of the cylinder body 1. A double-layer seal is arranged in the sealing housing 31 to seal the gap between the piston rod 11 and the cylinder body 1. The first sealing ring 32 isolates rust and water vapor outside the sealing housing 31. The second sealing ring 33 is arranged below the first sealing ring 32 to block the water vapor and rust leaked by the first sealing ring 32, greatly improving the protection effect on the cylinder body 1 and preventing rust and water vapor from entering the inside of the cylinder body 1 and damaging the cylinder body 1.

[0056] During specific implementation, the first sealing ring 32 is a waterproof ring, the second sealing ring 33 is a dust-proof ring, and both the first sealing ring 32 and the second sealing ring 33 are made of rubber rings or silicone rings.

[0057] During specific implementation, corresponding installation positions are arranged inside the sealing housing 31 to

[0058] In some embodiments, refer to Figure 3 , the top surface of the first sealing ring 32 is divided into a first ring surface 321 and a second ring surface 322 from the inside. The first ring surface 321 is flush with the top end surface of the sealing housing 31, and the inner ring edge of the first ring surface 321 is in contact with the piston rod 11. The second ring surface 322 gradually inclines outward from top to bottom and is in contact with the inner wall of the sealing housing 31. The part where the first ring surface 321 is located can block the gap between the perforation and the piston rod 11, directly isolating most of the rust and water vapor outside the piston rod 11. A small amount of water vapor or rust entering the sealing housing 31 is intercepted by the second sealing ring 32, realizing efficient protection of the cylinder body. The second ring surface 322 is in contact with the sealing housing 31 to ensure the relative fixation of the first sealing ring 32 and the sealing housing 31 and prevent the first sealing ring 32 from detaching from the sealing housing 31.

[0059] During specific implementation, an annular gap is formed between the perforation and the piston rod 11, and the area where the first ring surface 321 is located is filled in the annular gap to isolate rust and water vapor outside the sealing housing 31, realizing the first layer of sealing.

[0060] In some embodiments, refer to Figure 2, the bottom surface of the second sealing ring 33 forms a sealing groove 331 in an inverted V shape; a limiting retaining ring 13 is provided at the top of the cylinder body 1, and the limiting retaining ring is coaxially arranged with the piston rod 11. The limiting retaining ring 13 can be inserted into and cooperated with the sealing groove 331 up and down. The V-shaped sealing groove 331 can be aligned with the limiting retaining ring 13 up and down to seal in the circumferential direction of the piston rod 11, further improving the sealing effect on the gap between the cylinder body 1 and the piston rod 11.

[0061] In some embodiments, referring to Figure 5 and Figure 9 , an external thread 12 is provided on the outer periphery of the top of the cylinder body 1, and an internal thread corresponding to the external thread 12 is provided on the inner wall of the bottom opening of the sealing housing 31. The external thread 12 is in threaded cooperation with the internal thread. The cooperation of the external thread 12 and the internal thread enables the sealing housing 31 and the cylinder body 1 to be connected by a lock nut, with high connection strength, simple disassembly and assembly, and reduced operation difficulty for employees; the way of threaded cooperation between the internal thread and the external thread 12 can initially isolate water vapor and further improve the protection of the cylinder body 1.

[0062] In some embodiments, referring to Figure 6 , a fireproof ring 4 is provided on the upper side of the sealing housing 31. As a safeguard, the fireproof ring 4 can reduce the probability of safety accidents and prevent fire from occurring at the piston rod 11.

[0063] In some embodiments, referring to Figure 1 and Figure 5 , a connecting plate 5 is provided at the top of the piston rod 11. The plate surface of the connecting plate 5 is perpendicular to the horizontal direction, and an installation hole 51 is formed on the connecting plate 5 for connecting with the material guiding roller. The connecting plate 5 is arranged at the top of the piston rod 11 to provide an installation component for the material guiding roller. The installation hole 51 allows the material guiding roller to pass through to realize the material guiding operation. The settings of the connecting plate 5 and the installation hole 51 ensure the normal operation of the material guiding roller.

[0064] In some embodiments, referring to Figure 6 , the cylinder assembly for the material guiding roller of the rolling mill further includes a fixing frame 6, and the fixing frame 6 is fixedly connected to the ground; the cylinder body 1 is installed inside the fixing frame 6, and a reinforcing ring 14 is provided on the outer periphery of the cylinder body 1. The reinforcing ring 14 is detachably connected to the fixing frame 6. The fixing frame 6 can fix the cylinder body 1 to keep the cylinder body relatively fixed with the ground and ensure the normal progress of the material guiding work. The reinforcing ring 14 increases the contact area with the fixing frame 6 and facilitates the connection with the fixing frame 6.

[0065] Specifically in implementation, a support rod is provided on the fixing frame 6, and a plurality of protrusions are uniformly provided on the outer periphery of the reinforcing ring 14, and the protrusions correspond to the support rods one by one. When installing the cylinder body 1, the protrusions are clamped with the support rods up and down, and then the cylinder body 1 is fixed on the fixing frame 6.

[0066] In some embodiments, referring toFigure 8 At the bottom of the piston rod 11, there is a piston plate 17. The piston plate 17 divides the inside of the cylinder body 1 into a first chamber and a second chamber from top to bottom. The piston rod 17 is arranged in the first chamber, and the second chamber is used to push the piston plate 17 to move upward. A boss is formed at the bottom of the second chamber; a U-shaped buffer channel 16 is also opened at the bottom of the second chamber. One end of the buffer channel 16 is communicated with the bottom of the second chamber, and the other end is communicated with the top of the boss. The top position of the boss is higher than the bottom of the second chamber. When the piston rod 11 is forced to descend under force, the piston plate 17 descends, and the air is compressed downward under pressure. It enters from the higher end of the buffer channel 16 (i.e., the end communicated with the boss) and comes out from the bottom of the second chamber (i.e., the end communicated with the second chamber). During the gas compression process, the gas is discharged from the bottom of the second chamber and buffers the piston plate 17 above, realizing the protection of the piston plate 17 and reducing the damage of the piston rod 11.

[0067] As another setting method of the buffer channel 16, refer to Figure 7 , a buffer ring groove 15 is opened at the bottom of the second chamber; a U-shaped buffer channel 16 is also opened at the bottom of the second chamber. One end of the buffer channel 16 is communicated with the buffer ring groove 15, and the other end is communicated with the inner cavity of the second chamber. The bottom position of the buffer ring groove 15 is lower than the bottom surface position of the second chamber.

[0068] When the piston rod 11 is forced to descend under force, the piston plate 17 descends, and the air is compressed downward under pressure. It enters from the higher end of the buffer channel 16 and comes out from the buffer ring groove 15. During the gas compression process, the gas is discharged from the buffer ring groove 15 and buffers the piston plate 17 above the buffer ring groove 15. The gas ejected from the buffer ring groove 15 holds back the piston rod 11, avoiding the direct collision of the piston rod 11 with the cylinder body 1 and reducing the probability of damage to the cylinder body 1 or the piston rod 11.

[0069] During specific implementation, a piston protrusion 171 is arranged on the lower surface of the piston plate 17 corresponding to the buffer ring groove 15. The buffer ring groove 15 is an inverted frustum-shaped groove, and the piston protrusion 171 is an inverted frustum-shaped protrusion. The piston protrusion 171 is adapted to the buffer ring groove 15.

[0070] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cylinder assembly for a rolling mill feed roller, characterized in that: include: The cylinder body has a piston rod slidingly inserted therein and moving up and down in the vertical direction; An anti-vibration assembly, comprising an anti-vibration seat, the anti-vibration seat being connected to the bottom of the cylinder body and fixed to the ground; and The sealing assembly is sleeved on the piston rod and is used for sealing the gap between the piston rod and the cylinder body.

2. The cylinder assembly for the feed roller of a rolling mill according to claim 1, characterized in that: The anti-seismic assembly also includes: A shock-absorbing column, erected on the top of the anti-seismic seat; A shock-absorbing tube is arranged at the bottom of the cylinder body and is plugged and matched with the shock-absorbing column in an up-and-down manner; and The elastic member is sleeved on the outer circumference of the shock absorbing column and the shock absorbing tube, and the two ends of the elastic member are respectively connected to the bottom of the cylinder body and the anti-vibration seat.

3. The cylinder assembly for the rolling mill feed roller according to claim 1, characterized in that: The sealing assembly comprises: A sealing shell with an opening at the bottom, wherein a through hole is provided in the middle of the sealing shell, and the through hole is in sliding cooperation with the piston rod; A first sealing ring is disposed inside the sealing housing and is coaxially arranged with the piston rod, wherein an inner ring of the first sealing ring is slidably matched with the piston rod; and The second sealing ring is arranged inside the sealing shell and coaxially arranged below the first sealing ring. The second sealing ring is in sealing contact with the top of the cylinder body.

4. The cylinder assembly for the guide roller of a rolling mill as claimed in claim 3, characterized in that: The top surface of the first sealing ring is divided into a first annular surface and a second annular surface from the inside. The first annular surface is flush with the top end surface of the sealing shell, and the inner ring edge of the first annular surface is in contact with the piston rod. The second annular surface gradually tilts outward from top to bottom and abuts against the inner wall of the sealing shell.

5. The cylinder assembly for the guide roller of a rolling mill as claimed in claim 3, characterized in that: The bottom surface of the second sealing ring forms an inverted V-shaped sealing groove; A limit stop ring is provided on the top of the cylinder body. The limit stop is coaxially arranged with the piston rod. The limit stop ring can be plugged and matched with the sealing groove up and down.

6. The cylinder assembly for the guide roller of a rolling mill as claimed in claim 3, characterized in that: The top periphery of the cylinder body is provided with an external thread, and the bottom inner wall of the sealing shell is provided with an internal thread corresponding to the external thread, and the external thread is threadably matched with the internal thread.

7. The cylinder assembly for the guide roller of a rolling mill as claimed in claim 3, characterized in that: A fireproof ring is arranged on the upper side of the sealed shell.

8. The cylinder assembly for the material guide roller of a rolling mill according to claim 1, characterized in that: A connecting plate is arranged on the top of the piston rod, the plate surface of the connecting plate is perpendicular to the horizontal direction, and a mounting hole is formed on the connecting plate, and the mounting hole is used to connect with the feed guide roller.

9. The cylinder assembly for the guide roller of a rolling mill according to claim 1, characterized in that: The cylinder assembly for the rolling mill feed roller also includes a fixing frame, which is fixed to the ground; the cylinder body is installed inside the fixing frame, and a reinforcement ring is provided on the outer periphery of the cylinder body, and the reinforcement ring is detachably connected to the fixing frame.

10. The cylinder assembly for the guide roller of a rolling mill according to claim 1, characterized in that: A piston plate is provided at the bottom of the piston rod, and the piston plate divides the interior of the cylinder body into a first chamber and a second chamber from top to bottom. The piston rod is provided in the first chamber, and the second chamber is used to push the piston plate to move upward, and a boss is formed at the bottom of the second chamber; A U-shaped buffer channel is also provided at the bottom of the second cavity, one end of the buffer channel is communicated with the bottom of the second cavity, and the other end of the buffer channel is communicated with the top of the boss.

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