An inclined wedge structure and a self-lubricating hot rolling coil

Abstract

The present invention discloses a slanted wedge structure and a self-lubricating hot-rolled roll, belonging to the field of mechanical technology. The roll comprises a pyramidal shaft, a sector plate, a slanted wedge structure, and a support structure. The sector plate is slidably connected to the outside of the pyramidal shaft via the slanted wedge structure, and the end of the pyramidal shaft is connected to the support structure. The slanted wedge structure comprises a carbon fiber plate, a steel liner, and a heat shield. The carbon fiber plate is fixedly connected to the pyramidal shaft, the heat shield is fixedly connected to the sector plate, and the steel liner is fixedly connected to the heat shield via screws. A channel is provided along the long axis of the pyramidal shaft; a through hole is provided on the contact surface between the pyramidal shaft and the carbon fiber plate; the carbon fiber plate has a through hole that matches the pyramidal shaft; the steel liner has a through hole that matches the carbon fiber plate; and ventilation slots are provided on the surface of the steel liner that contacts the heat shield. The present invention utilizes the heat shield to isolate most of the heat. Further, through holes and grooves are provided in the pyramidal shaft, the carbon fiber plate, and the steel liner to allow a cooling medium to pass through to cool the roll, thereby improving the operating performance of the self-lubricating hot-rolled roll.

Description

Technical Field

[0001] The present invention belongs to the field of mechanical technology, and more particularly relates to an inclined wedge structure and a self-lubricating hot rolling coil. Background Art

[0002] Coilers are crucial equipment on strip production lines, winding extra-long metal strips into coils. The coiler, the core component, has expansion and contraction capabilities: it coils the strip when expanded and unloads it when contracted. As demands for aluminum strip coil quality increase, the coiler drum of non-self-lubricating aluminum hot-rolling coilers requires regular addition of high-temperature grease to ensure lubrication of the internal sliding surfaces during expansion and contraction. As the coiler rotates at high speeds to coil the strip, the grease inside the coiler can easily spill onto the aluminum coil, affecting coil quality and increasing the cost of subsequent grease removal. Grease can also spill onto surrounding equipment and into pits, causing significant pollution.

[0003] For example, patent CN108144987A discloses a new type of plunger-type hot-rolled coiler. It includes an expansion and contraction cylinder, a connector, a hollow main shaft, an extension shaft, a wedge-shaped tie rod, a sector plate, a front wear plate, a plunger steel sleeve, a tail wear plate, and end wear plates. It also includes an open-loop water channel cooling system. However, this patent utilizes an oil lubrication system, which is unsuitable for aluminum coils with high coiling requirements. Therefore, the use of self-lubricating wear-resistant materials is an effective solution.

[0004] After searching, patent CN211052195U discloses a self-lubricating pyramidal shaft reel, which includes a pyramidal main shaft, a hollow shaft sleeve and a fan-shaped plate. The pyramidal main shaft passes through the hollow shaft sleeve, and the fan-shaped plate is slidingly connected to the outside of the pyramidal main shaft. The reel also includes a self-lubricating wear-resistant plate and a self-lubricating wear-resistant sleeve; the self-lubricating wear-resistant sleeves are respectively installed in the inner holes at both ends of the hollow shaft sleeve, and they cooperate with the outer cylindrical surface of the pyramidal main shaft and can slide relatively; the fan-shaped plate and the pyramidal main shaft are slidingly connected through a dovetail structure and a self-lubricating wear-resistant plate is provided between the sliding surfaces of the two, and one end face of the self-lubricating wear-resistant plate is slidingly connected to one end face of the hollow shaft sleeve.

[0005] However, the reel is a cold-rolled reel and is not suitable for hot-rolled environments. Moreover, the reel does not have a ventilation structure. During use, heat cannot be discharged in time, which affects the service life of the reel. Summary of the Invention

[0006] 1. Problem to be solved

[0007] In response to the problem that existing self-lubricating reels are not suitable for hot rolling environments, the present invention provides a bevel wedge structure and a self-lubricating hot rolling reel including the bevel wedge structure. The bevel wedge structure adopts a self-lubricating wear-resistant plate, and the reel using the bevel wedge structure has stable performance in a hot rolling environment.

[0008] 2. Technical solution

[0009] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0010] A wedge structure for a hot-rolled coil, comprising:

[0011] The carbon fiber plate has a contour structure, a mounting hole is opened on the contour structure, and has a relative sliding friction surface;

[0012] The heat insulation plate is placed in the sliding groove of the reel sector plate and contacts the inner wall of the sliding groove, and can block the heat transfer of the metal strip with a temperature of not less than 200°C wound on the outer side of the reel sector plate; preferably, it can block the heat of the metal strip with a temperature of not less than 200°C, 260°C, 300°C, 400°C, 500°C, and 600°C wound on the outer side of the reel sector plate;

[0013] A steel lining plate is placed between the heat insulation plate and the carbon fiber plate. The steel lining plate is fixed to the heat insulation plate and can move relatively along the sliding friction surface under the driving action of the sector plate.

[0014] A self-lubricating hot rolling coil with the above-mentioned inclined wedge structure also includes a pyramid shaft, a fan-shaped plate and a support structure. The fan-shaped plate is slidably connected to the outside of the pyramid shaft through the inclined wedge structure, and the end of the pyramid shaft is connected to the support structure.

[0015] The wedge structure comprises:

[0016] The carbon fiber plate has a contour structure, a mounting hole is opened on the contour structure, and has a relative sliding friction surface;

[0017] The heat insulation plate is placed in the sliding groove of the reel sector plate and contacts the inner wall of the sliding groove, which can block the heat transfer of the metal strip with a temperature of not less than 200°C wound on the outer side of the reel sector plate;

[0018] A steel lining plate is placed between the heat insulation plate and the carbon fiber plate. The steel lining plate is fixed to the heat insulation plate and can move relatively along the sliding friction surface under the driving action of the sector plate.

[0019] The carbon fiber plate is fixedly connected to the pyramid axis, the heat insulation plate is fixedly connected to the fan-shaped plate, a steel lining plate is provided on the heat insulation plate, and the steel lining plate is fixedly connected to the heat insulation plate by screws.

[0020] Furthermore, a channel is opened on the pyramid axis, and the channel starts from the end of the pyramid axis and is opened along the long axis direction of the pyramid axis; a through hole is opened on the contact surface between the pyramid axis and the carbon fiber plate, and a through hole adapted to the pyramid axis is opened on the carbon fiber plate; a through hole adapted to the through hole of the carbon fiber plate is opened on the steel lining plate, and a ventilation groove is opened on the surface of the contact side of the steel lining plate and the insulation plate for discharging heat.

[0021] Furthermore, two through holes are provided on the carbon fiber plate, the straight-line distance between the through holes is greater than the displacement distance of the reel, and the through holes are connected by a groove.

[0022] Furthermore, the carbon fiber plate adopts carbon fiber self-lubricating wear-resistant material.

[0023] The friction coefficient of the carbon fiber plate is 0.15-0.2, the tensile strength at 260° C. is 186 MPa, the bending strength is 310 MPa, and the elastic modulus is 32400 MPa.

[0024] Furthermore, a mounting pin is provided on the carbon fiber plate, and the carbon fiber plate is fixed on the pyramid axis through the mounting pin.

[0025] A wear-resistant strip is provided at the contact surface between the sector plate and the pyramid shaft, and the wear-resistant strip is fixed to the side surface of the pyramid shaft by screws. Furthermore, a through hole is provided on the wear-resistant strip for heat dissipation.

[0026] Furthermore, front end wedges are provided on both sides of the heat insulation board and the steel lining board, which are made of the same material as the heat insulation board and are used to prevent the heat of the steel coil from being transferred from the side to the carbon fiber board.

[0027] Furthermore, the inclined wedge structure is dovetail-shaped, a dovetail groove is provided on the fan-shaped plate, a dovetail portion adapted to the dovetail groove is provided on the pyramid shaft, the dovetail portion is placed in the dovetail groove, a pin hole is provided on the inclined surface of the dovetail groove, and the carbon fiber plate is fixed to the pyramid shaft by means of an installation pin.

[0028] The end of the pyramidal shaft is connected to the supporting structure, which refers to the supporting structure in patent CN212264209U, and includes a pull rod, which is arranged in the inner hole of the pyramidal shaft and slides with the inner hole; it also includes a bearing, a support sleeve, a transparent cover, a sleeve and a shaft sleeve; the bearing is arranged on the outer circle of the end of the pyramidal shaft, the support sleeve is sleeved outside the shaft, the sleeve is arranged on the pull rod through the shaft sleeve, and is fixed to the right end face of the pyramidal shaft by a fastener, the transparent cover is sleeved outside the sleeve, and is connected to the support sleeve by a fastener.

[0029] Furthermore, the thermal conductivity of the heat insulation plate and the front end wedge is less than or equal to 0.26 W / mk.

[0030] Furthermore, the hardness of the steel liner is not less than HV550. The hot-rolled coil of the present invention utilizes a self-lubricating carbon fiber plate instead of lubricating oil to prevent lubricating oil from overflowing and contaminating the aluminum strip. Furthermore, considering that the coil is used in a hot-rolling environment, where temperature significantly affects the performance of the carbon fiber plate, the present invention first utilizes a heat shield to isolate most of the heat from the steel coil, and then further provides an air inlet channel within the pyramid shaft and the self-lubricating carbon fiber plate to achieve cooling of the coil.

[0031] The hot rolling drum is not only suitable for hot rolling aluminum strips, but also for hot rolling of metal strips such as steel strips, copper strips, and titanium strips. The cooling method can be air cooling, water cooling, steam cooling, etc.

[0032] 3. Beneficial effects

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) A self-lubricating hot rolling reel of the present invention is provided with a heat insulation plate between the carbon fiber plate and the fan-shaped plate. The heat insulation plate is made of a material with a thermal conductivity of less than or equal to 0.26 W / mk, which isolates most of the heat, avoids the performance degradation of the carbon fiber plate due to the high hot rolling temperature, and improves the operating stability of the reel structure.

[0035] (2) A self-lubricating hot rolling drum of the present invention has channels respectively provided on the pyramid shaft, the carbon fiber plate and the steel lining plate. Heat is transferred from the fan-shaped plate inward, sequentially through the heat insulation plate, the steel lining plate and the carbon fiber plate, and then into the channel of the pyramid shaft through the through hole. Air flow can also be introduced from the channel of the pyramid shaft to promote heat dissipation of the drum by using air flow in the opposite direction.

[0036] (3) A self-lubricating hot-rolled reel of the present invention has two or more through holes on the surface of the carbon fiber plate, and the through holes are connected by grooves. Iron chips or particles generated during use are transferred to the grooves during continuous sliding. Under the action of the circulating airflow, the iron chips are carried out of the reel contact surface, which is beneficial to improving the service life of the reel;

[0037] (4) The carbon fiber plate and wear-resistant strip of the present invention adopt carbon fiber self-lubricating wear-resistant material, which can separate carbon particles at the end of the main fiber bundle to achieve long-term self-lubrication, low friction coefficient, and strong mechanical properties. While no additional lubrication structure is required, the wear rate at this location is reduced, allowing the reel to maintain a high-precision state for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that these drawings are designed for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, unless otherwise specified, these drawings are intended only to conceptually illustrate the structures described herein and are not necessarily drawn to scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Schematic diagram of the assembly of the hot-rolled coil of the present invention;

[0041] Figure 2 This is a schematic diagram of the inclined wedge structure of the present invention;

[0042] Figure 3This is a cross-sectional view of the inclined wedge structure of the present invention;

[0043] Figure 4 This is a cross-sectional view of the pyramid axis of the present invention;

[0044] Figure 5 This is a schematic structural diagram of the self-lubricating carbon fiber plate of the present invention;

[0045] Figure 6 This is a schematic diagram of the steel liner structure of the present invention;

[0046] In the figure: 1, pyramid axis; 11, channel;

[0047] 2: Sector plate;

[0048] 3: wedge structure; 31, carbon fiber plate; 311, through hole; 312, mounting hole; 313, mounting pin; 32, heat shield; 33, steel liner; 331, ventilation slot; 34, front wedge; 35, wear strip; 36, screw;

[0049] 4: Support structure. DETAILED DESCRIPTION

[0050] The following detailed description of exemplary embodiments of the present invention refers to the accompanying drawings, which form a part of the description, and in which exemplary embodiments of the present invention that can be implemented are shown as examples. Although these exemplary embodiments are described in sufficient detail to enable those skilled in the art to implement the present invention, it should be understood that other embodiments can be implemented and various changes can be made to the present invention without departing from the spirit and scope of the present invention. The following more detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but is merely for illustration and does not limit the description of the features and characteristics of the present invention, so as to propose the best way to perform the present invention and be sufficient to enable those skilled in the art to implement the present invention. Therefore, the scope of the present invention is limited only by the appended claims.

[0051] Example 1

[0052] The hot rolling coil of Example 1 is used for hot rolling of aluminum strips, and its structure is as follows: Figure 1-6 shown.

[0053] A hot rolling coil comprises a pyramid shaft 1, a sector plate 2, an inclined wedge structure 3 and a support structure 4, wherein the sector plate 2 is slidably connected to the outside of the pyramid shaft 1 through the inclined wedge structure 3. Figure 1As shown, the inclined wedge structure 3 includes a carbon fiber plate 31, a steel lining plate 33 and a heat insulation plate 32. The carbon fiber plate 31 is fixedly connected to the pyramid axis 1, and the heat insulation plate 32 is fixedly connected to the fan-shaped plate 2. A steel lining plate 33 is provided on the heat insulation plate 32. The steel lining plate 33 is fixedly connected to the heat insulation plate 32 by screws 36. When the fan-shaped plate 2 slides on the pyramid axis 1, the carbon fiber plate 31 and the steel lining plate 33 are slidably connected.

[0054] A steel lining plate 33 is provided between the carbon fiber plate 31 and the heat insulation plate 32 , and the steel lining plate 33 is utilized to reduce the wear of the heat insulation plate 32 and to increase the service life of the heat insulation plate.

[0055] Front end wedges 34 are provided on both sides of the heat insulation board 32 and the steel lining board 33. The front end wedges 34 are made of the same material as the heat insulation board 32 and are used to prevent the heat of the steel coil from being transferred from the side to the carbon fiber board 31.

[0056] The inclined wedge structure 3 is dovetail-shaped, a dovetail groove is provided on the fan-shaped plate 2, and a dovetail portion adapted to the dovetail groove is provided on the pyramid shaft 1. The dovetail portion is placed in the dovetail groove, and a pin hole is provided on the inclined surface of the dovetail groove. The carbon fiber plate 31 is fixed to the pyramid shaft 1 by the mounting pin 312.

[0057] The inclined wedge structure 3 is a dovetail connection structure formed by a dovetail groove and a dovetail portion, which can withstand greater torque and the reel can withstand greater tension; at the same time, the sliding surface is provided with a carbon fiber plate 31, which has a low friction coefficient, can withstand compressive stress, and has strong mechanical properties.

[0058] The present application realizes efficient heat transfer by selecting carbon fiber plates 31, steel lining plates 33 and heat insulation plates 32 made of suitable materials. The carbon fiber plates 31 not only need a suitable friction coefficient at the sliding surface, but also need to consider the compressive stress on the carbon fiber plates 31 when the metal belt is wound. Therefore, the carbon fiber plates 31 also have certain tensile strength and bending strength. The present application adopts carbon fiber plates 31 made of Saint-Gobain WearComp material. The friction coefficient of this material is 0.15-0.2, the tensile strength at 260°C is 186Mpa, the bending strength is 310Mpa, and the elastic modulus is 32400Mpa. However, when the temperature is higher than 260°C, the material strength decreases significantly, and the rolling temperature of hot-rolled steel strips, such as hot-rolled aluminum strips, is 500-600°C. In order to ensure the performance of the carbon fiber plates 31, the operating temperature of the carbon fiber plates 31 needs to be reduced to 260°C. Therefore, the present application uses DOTHERM with a thermal conductivity less than or equal to 0.26W / mk. The heat insulation board 32 is made of 800M material to isolate most of the heat. The side portion of the steel liner 33 not covered by the heat insulation board 32 adopts a front end wedge 34 made of the same material as the heat insulation board 32. The steel liner 33 is made of 42CrMo with a hardness of not less than HV550. While insulating, it ensures the stable operation of the drum structure.

[0059] However, the effect of the heat insulation plate 32 is limited, so the present application opens through holes and grooves on the pyramid shaft 1, the carbon fiber plate 31 and the steel lining plate 33 to pass cooling medium to further cool the drum.

[0060] like Figure 2-6 As shown, a channel 11 is provided on the pyramid axis 1, and the channel 11 starts from the end of the pyramid axis 1 and is provided along the long axis direction of the pyramid axis 1; a through hole 311 is provided on the contact surface between the pyramid axis 1 and the carbon fiber plate 31, and a through hole 311 adapted to the pyramid axis 1 is provided on the carbon fiber plate 31; a through hole adapted to the carbon fiber plate 31 is provided on the steel lining plate 33, and a ventilation groove 331 is provided on the surface of the contact side of the steel lining plate 33 and the insulation plate 32 for discharging airflow.

[0061] The reel in Example 1 is used for winding aluminum strips. Since aluminum strips are mostly used in food, packaging and other fields, their surface cleanliness requirements are high. The traditional method of adding lubricating oil will cause abnormal wear of the reel due to untimely addition of lubricating oil and excessive lubricating oil overflowing onto the steel coil, affecting the quality of the steel coil. In addition, adding lubricating oil also requires the unit to be shut down regularly. Therefore, the present application adopts carbon fiber plate 31 to effectively solve the problem of grease overflow affecting the quality of aluminum strips. In addition, the carbon fiber plate 31 has higher mechanical properties and high machining efficiency.

[0062] However, the reel adopted in this manner in the prior art is generally used in cold rolling technology, such as patent CN211052195U. The design of the reel does not need to consider the impact of ambient temperature on the use of the reel. Therefore, when it is used in high-temperature hot rolling conditions, it will often cause damage to the equipment due to the inability to dissipate heat in time. Therefore, the present application opens a channel 11 on the pyramidal axis 1, and the channel 11 starts from the end of the pyramidal axis 1 and is opened along the long axis direction of the pyramidal axis 1; a through hole is opened on the contact surface between the pyramidal axis 1 and the carbon fiber plate 31, and a through hole 311 is opened on the carbon fiber plate 31 to match the pyramidal axis 1; a ventilation groove 331 is opened on the surface of the steel lining plate 33 on the contact side with the carbon fiber plate 31 for dissipating heat. During actual use, since the reel of the present application is used for hot rolling of aluminum strips, the hot-rolled aluminum strips are wrapped around the outer periphery of the reel, and the heat is transmitted inward from the fan-shaped plate 2, through the heat insulation plate 32, the steel lining plate 33, and the carbon fiber plate 31 in turn, and is transmitted into the channel 11 of the pyramidal axis 1 through the through hole 311. In order to further promote heat dissipation, air flow is introduced from the channel 11 of the pyramidal axis 1, and the air flow in the opposite direction will promote the heat dissipation of the reel. The air flow passes through the channel 11 of the pyramidal axis 1, through the through hole 311 opened on the carbon fiber plate 31, and is discharged from the ventilation groove 331 of the steel lining plate 33, thereby achieving the heat dissipation effect.

[0063] like Figure 5As shown, four mounting holes 312 and two through holes 311 are provided on the carbon fiber plate 31 , wherein the straight-line distance between the through holes 311 is greater than the distance of the reel displacement, and the through holes 311 are connected by grooves.

[0064] Due to the relative sliding of the carbon fiber plate 31 and the steel lining plate 33 during the expansion and contraction of the drum, the through hole 311 on the carbon fiber plate 31 and the ventilation groove 331 on the steel lining plate 33 and the through hole on the pyramid axis 1 are displaced, resulting in poor airflow. Therefore, the present application opens two through holes 311 on the carbon fiber plate 31, and the position between the two through holes 311 is determined according to the maximum displacement of the drum. A groove is opened between the through holes 311, and the two through holes 311 are connected by the groove, so that airflow flows between the two through holes 311. When the ventilation groove 331 on the steel lining plate 33 and the through hole 311 opened on the carbon fiber plate 31 are misaligned during use, the airflow enters the ventilation groove 331 on the steel lining plate 33 through the groove, thereby achieving the effect of heat dissipation.

[0065] It is worth noting that after the reel is used for a long time, wear and tear will inevitably occur on the contact sliding surface. If the worn iron filings or particles are not discharged in time, it is easy to cause an increase in the friction coefficient, increase wear, and affect the service life of the reel. In severe cases, it may cause it to get stuck and become unusable. Therefore, a through hole 311 and a groove connecting the through hole 311 are opened on the carbon fiber plate 31. Some iron filings or particles generated during use are transferred to the groove during the continuous sliding process. Under the action of the circulating airflow, the iron filings are brought out of the contact surface of the reel, which is beneficial to improving the service life of the reel.

[0066] To ensure smooth airflow, the present application designs the size of the airflow channel, wherein the channel diameter of the pyramid axis 1 is 50 mm, the diameter of the through hole 311 of the carbon fiber plate is 4 to 5 mm, the length of the groove is greater than the maximum displacement of the reel, which is set to 60 mm in Example 1, the diameter of the ventilation groove 331 of the steel lining plate 33 is 9 mm, and the diameter of the through hole 311 of the carbon fiber plate is smaller than the channel diameter of the pyramid axis 1, thereby increasing the airflow speed and taking away heat and particulate matter faster.

[0067] The carbon fiber plate 31 is made of a self-lubricating, wear-resistant carbon fiber material. This material separates carbon particles at the end of the main fiber bundle, achieving long-term self-lubrication. This material has a low friction coefficient and strong mechanical properties. This reduces the wear rate at this location without the need for additional lubrication, allowing the reel to maintain high precision for extended periods. However, the use of self-lubricating, wear-resistant carbon fiber material is relatively expensive, and wear is inevitable during use. By adjusting the thickness of the steel liner 33, the reel's performance can be restored. When the sector plate 2 slides relative to the pyramid axis 1, the steel liner 33 and the self-lubricating carbon fiber plate 35 slide against each other.

[0068] A mounting pin 312 is provided on the carbon fiber plate 31, and the carbon fiber plate 31 is fixed to the pyramid shaft 1 through the stepped mounting pin 312. Since carbon fiber is a self-lubricating and wear-resistant material, in order to reduce costs, a thinner carbon fiber plate 31 is applied. The thickness of the carbon fiber plate in the embodiment is 10 mm, but the traditional method of fixing with screws 36 has the problem that the screws 36 are too high, even exceeding the thickness of the carbon fiber plate, resulting in the carbon fiber plate and the steel lining plate 33 being unable to fit tightly and achieve sliding.

[0069] like Figure 3 As shown, a wear-resistant strip 35 is provided at the contact surface between the sector plate 2 and the pyramid shaft 1. The wear-resistant strip 35 is fixed to the side of the pyramid shaft 1 by a screw 36. When the reel is rolled up, the sector plate 2 moves downward. Therefore, a wear-resistant strip 35 is provided on the side sliding surface between the sector plate 2 and the pyramid shaft 1 to improve the service life of the reel. A through hole is opened on the wear-resistant strip 35, and air flow is dispersed from the through hole of the wear-resistant strip 35.

[0070] The end of the pyramidal shaft 1 is connected to the support structure 4, which refers to the support structure 4 in patent CN212264209U, and includes a pull rod, which is arranged in the inner hole of the pyramidal shaft 1 and slides with the inner hole; it also includes a bearing, a support sleeve, a transparent cover, a sleeve and a shaft sleeve; the bearing is arranged on the outer circle of the end of the pyramidal shaft 1, the support sleeve is sleeved outside the shaft, the sleeve is arranged on the pull rod through the shaft sleeve, and is fixed to the right end face of the pyramidal shaft 1 by a fastener, the transparent cover is sleeved outside the sleeve, and is connected to the support sleeve by a fastener.

[0071] Example 2

[0072] The hot rolling drum of Example 2 is used for hot rolling of steel coils, and its structure is as shown in Example 1. When the steel coils are hot rolled, since the cleanliness of the surface of the steel coils is lower than that of the aluminum strips, air flow can be introduced through the channel of the pyramid axis 1, and cooling water and water vapor mixture can also be introduced to cool the drum.

Claims

1. A wedge structure (3) for a hot-rolled coil, characterized in that: include: A carbon fiber plate (31) has a contour structure, a mounting hole (312) is provided on the contour structure, and the carbon fiber plate (31) has a relative sliding friction surface; The heat insulation plate (32) is placed in the sliding groove of the reel sector plate (2) and contacts the inner wall of the sliding groove, and can block the heat transfer of the metal strip with a temperature not lower than 200° C. wound on the outer side of the reel sector plate (2); A steel lining plate (33) is placed between the heat insulation plate (32) and the carbon fiber plate (31), and the steel lining plate (33) is fixedly connected to the heat insulation plate (32). The steel lining plate (33) and the heat insulation plate (32) move relatively along the sliding friction surface under the driving action of the sector plate (2).

2. The wedge structure (3) of the hot rolling coil according to claim 1, characterized in that: The thermal conductivity of the heat insulation board (32) is less than or equal to 0.26 W / mk.

3. The wedge structure (3) of the hot rolling coil according to claim 1, characterized in that: More than two through holes (311) are provided on the sliding friction surface of the carbon fiber plate (31), the straight-line distance between the through holes (311) is greater than the displacement distance of the reel, and the through holes (311) are connected by grooves.

4. The wedge structure (3) of the hot rolling coil according to claim 1, characterized in that: The carbon fiber plate (31) is provided with a mounting pin (313), and the carbon fiber plate is fixed on the pyramid shaft (1) via the mounting pin (313).

5. The wedge structure (3) of the hot rolling coil according to claim 3, characterized in that: The steel lining plate (33) is provided with a through hole adapted to the carbon fiber plate (31), and a ventilation groove (331) is provided on the contact surface between the steel lining plate (33) and the heat insulation plate (32).

6. A self-lubricating hot rolling coil, comprising a pyramid shaft (1), a sector plate (2), an inclined wedge structure (3) and a support structure (4), wherein the sector plate (2) is slidably connected to the outside of the pyramid shaft (1) through the inclined wedge structure (3), and the end of the pyramid shaft (1) is connected to the support structure (4), characterized in that: The inclined wedge structure (3) comprises: A carbon fiber plate (31) has a contour structure, a mounting hole (312) is provided on the contour structure, and the carbon fiber plate (31) has a relative sliding friction surface; The heat insulation plate (32) is placed in the sliding groove of the reel sector plate (2) and contacts the inner wall of the sliding groove, and can block the heat transfer of the metal strip with a temperature not lower than 200° C. wound on the outer side of the reel sector plate (2); A steel lining plate (33) is placed between the heat insulation plate (32) and the carbon fiber plate (31), and the steel lining plate (33) is fixedly connected to the heat insulation plate (32). The steel lining plate (33) and the heat insulation plate (32) move relative to each other along the sliding friction surface under the driving action of the fan-shaped plate (2).

7. The self-lubricating hot rolling coil according to claim 6, characterized in that: The pyramid axis (1) is provided with a channel (11) along the long axis direction, and a through hole (311) is provided on the contact surface between the pyramid axis (1) and the carbon fiber plate (31); the carbon fiber plate (31) is provided with a through hole (311) adapted to the pyramid axis (1); the steel lining plate (33) is provided with a through hole adapted to the carbon fiber plate (31), and a ventilation groove (331) is provided on the contact surface between the steel lining plate (33) and the heat insulation plate (32).

8. The self-lubricating hot rolling coil according to claim 7, characterized in that: More than two through holes (311) are provided on the carbon fiber plate (31), the straight-line distance between the through holes (311) is greater than the displacement distance of the reel, and the through holes (311) are connected by grooves.

9. The self-lubricating hot rolling coil according to claim 8, characterized in that: The carbon fiber plate (31) is provided with a mounting pin (313), and the carbon fiber plate (31) is fixed on the pyramid shaft (1) via the mounting pin (313).

10. The self-lubricating hot rolling coil according to claim 9, characterized in that: Front end wedges (34) are provided on both sides of the heat insulation board (32) and the steel lining board (33).

11. The self-lubricating hot rolling coil according to claim 10, characterized in that: The thermal conductivity of the front end wedge (34) and the heat insulation plate (32) is less than or equal to 0.26 W / mk.

12. The self-lubricating hot rolling coil according to claim 11, characterized in that: A wear-resistant strip (35) is provided at the contact surface between the sector plate (2) and the pyramid shaft (1), and the wear-resistant strip (35) is fixed on the side surface of the pyramid shaft (1).

13. The self-lubricating hot rolling coil according to claim 12, characterized in that: A through hole (311) is provided on the wear-resistant strip (35).

14. The self-lubricating hot rolling coil according to claim 13, characterized in that: The wear-resistant strip (35) is made of carbon fiber self-lubricating wear-resistant material.

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