Tension roller device, furnace coil production line and production method of furnace coil production line

Abstract

The invention relates to a tension roller device which comprises a tension roller and a first driving mechanism, and the first driving mechanism is configured to enable the tension roller to have an active rotation mode and a passive rotation mode: in the active rotation mode, the first driving mechanism drives the tension roller to rotate actively; in the passive rotation mode, the tension roller is a passive tension roller. In addition, the invention further relates to a furnace coil production line adopting the tension roller device and a production method of the furnace coil production line. According to the tension roller device, the first driving mechanism is configured to enable the tension roller to have the active rotating mode and the passive rotating mode, the working flexibility of the tension roller can be improved, the tension roller can adapt to different production working conditions, particularly, the tension roller device can be better suitable for a furnace coil production line, and the tension roller can actively rotate during standby; and high temperature is uniformly distributed on the whole perimeter of the tension roller, so that the service life of the tension roller is effectively prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of steel rolling, and particularly relates to a tension roll device, a coil annealing and pickling line using the tension roll device, and a production method of the coil annealing and pickling line. Background Art

[0002] The coil annealing and pickling line has the advantages of short process, simplified process, few equipment, low investment, large range of producible products, flexible production, high product precision, etc., and has a wide application market in the industry. It is a classic technology for rolling strip steel, especially for rolling stainless steel with high temperature sensitivity. However, its output is far from that of conventional hot continuous rolling, and it is difficult to meet the requirements of large production capacity and high output. Therefore, it is only used in the stainless steel production field at present.

[0003] Currently, a tension roll for adjusting the tension during strip coiling is provided between the coiling furnace and the pinch roll. Since this tension roll is installed on the pinch roll base and is just arranged near the steel inlet and outlet of the coiling furnace, it is baked by the high temperature (about 1000°C) in the coiling furnace during the operation and standby of the tension roll. Especially for the medium and heavy plate production line that can both coil and flat roll, when the tension roll is in the standby position, the long-term baking will cause multiple life bottlenecks such as bearing burnout, seal failure, roll surface failure, bearing seat deformation, and roll deformation. Its service life is generally only about 4 months. Not to mention the high spare part cost, just replacing this device takes about 6 - 8 hours, which brings great inconvenience and challenges to the product quality and production efficiency of production enterprises. Summary of the Invention

[0004] The present invention relates to a tension roll device, a coil annealing and pickling line using the tension roll device, and a production method of the coil annealing and pickling line, which can at least solve some defects of the prior art.

[0005] The present invention relates to a tension roll device, including a tension roll and a first driving mechanism, and the first driving mechanism is configured to enable the tension roll to have an active rotation mode and a passive rotation mode: in the active rotation mode, the first driving mechanism drives the tension roll to actively rotate; in the passive rotation mode, the tension roll is configured as a passive tension roll.

[0006] As one of the embodiments, the first driving mechanism includes a driving unit and a transmission unit, and the transmission unit is respectively connected to the tension roll and the driving unit;

[0007] Wherein, the transmission unit includes a driving wheel and a driven wheel in transmission cooperation, the driving wheel is connected to the output shaft of the driving unit, and the driven wheel is connected to the roll shaft of the tension roll.

[0008] As one of the implementation manners, the transmission unit further includes a rotation direction transformation controller, which is respectively connected to the driven wheel and the roller shaft, and is used to control whether the roller shaft rotates following the driven wheel.

[0009] As one of the implementation manners, the rotation direction transformation controller includes a clutch. The driven part of the clutch is connected to the driven wheel, and the driving part of the clutch is connected to the roller shaft.

[0010] As one of the implementation manners, a double-channel oil rotary joint is arranged at the end of the roller shaft of the tension roller. An oil inlet channel and an oil return channel are arranged in the roller shaft. Both the oil inlet channel and the oil return channel are communicated with the rotation direction transformation controller and are also communicated with the double-channel oil rotary joint.

[0011] As one of the implementation manners, the drive unit adopts a torque motor.

[0012] As one of the implementation manners, the tension roller device further includes a second drive mechanism for driving the tension roller to move between a working position and a maintenance position.

[0013] The present invention also provides a coil annealing production line, which includes a coiling furnace, an inlet pinch roll and an outlet pinch roll. A tension roller device is arranged between the coiling furnace and the inlet pinch roll and / or between the coiling furnace and the outlet pinch roll. At least one group of the tension roller devices adopts the tension roller device as described above.

[0014] As one of the implementation manners, the coil annealing production line has a coil rolling production mode and a flat rolling production mode.

[0015] The present invention also provides a production method for the above-mentioned coil annealing production line. The method includes:

[0016] In the coil rolling production mode, the tension roller adopts a passive rotation mode, and in the flat rolling production mode, the tension roller adopts an active rotation mode.

[0017] The present invention has at least the following beneficial effects:

[0018] In the present invention, by configuring the first drive mechanism to enable the tension roller to have an active rotation mode and a passive rotation mode, the working flexibility of the tension roller can be improved, so that the tension roller can adapt to different production conditions. In particular, this kind of tension roller device can be better applied to the coil annealing production line. When the tension roller is on standby, it can rotate actively, so that the high temperature is evenly distributed on the entire circumference of the tension roller, effectively extending the service life of the tension roller. Description of the Drawings

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Is the front view of the tension roller device;

[0021] Figure 2 Is the axonometric view of the tension roller device;

[0022] Figure 3 Is the left view of the tension roller device;

[0023] Figure 4 Is Figure 1 The partial sectional view A - A in

[0024] Figure 5 Is Figure 1 The partial sectional view B - B in

[0025] Figure 6 Is Figure 5 The partial structural schematic diagram in

[0026] Figure 7 Is Figure 1 The partial sectional view C - C in Specific embodiments

[0027] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0028] Embodiment 1

[0029] As Figures 1-4 , the embodiment of the present invention provides a tension roller device, including a tension roller 1 and a first driving mechanism. The first driving mechanism is configured to enable the tension roller 1 to have an active rotation mode and a passive rotation mode: in the active rotation mode, the first driving mechanism drives the tension roller 1 to rotate actively; in the passive rotation mode, the tension roller 1 is configured as a passive tension roller, that is, the first driving mechanism does not output a force to the tension roller 1.

[0030] The above-mentioned tension roll device can be applied to a coil annealing line, for example, arranged between the coiling furnace and the entry pinch roll, and / or arranged between the coiling furnace and the exit pinch roll. In one embodiment, the above-mentioned coil annealing line is a production line that can perform both coil rolling and flat rolling. Preferably, in the coil rolling condition, the tension roll 1 adopts a passive rotation mode, and in the flat rolling condition, the tension roll 1 adopts an active rotation mode, which can ensure that the tension roll 1 has high working reliability, and can better protect the tension roll 1 and extend its service life.

[0031] Optionally, the above-mentioned first drive mechanism includes a drive unit and a transmission unit 22, and the transmission unit 22 is respectively connected to the tension roll 1 and the drive unit.

[0032] Among them, the above-mentioned drive unit includes but is not limited to using a motor 21; the above-mentioned transmission unit 22 can adopt transmission methods such as belt drive, chain drive, and gear drive, including a driving wheel 221 and a driven wheel 222. The driving wheel 221 is connected to the output shaft of the drive unit, and the driven wheel 222 is connected to the roll shaft 111 of the tension roll 1. Among them, the driving wheel 221 can be coaxially connected to the output shaft of the drive unit through a transmission shaft 241; in this embodiment, the driving wheel 221 and the driven wheel 222 are connected by a belt or a transmission chain, that is, the above-mentioned transmission unit 22 adopts a belt drive or a chain drive method.

[0033] Such as Figure 2 and Figure 4 , the roll shaft 111 of the tension roll 1 can be appropriately extended to facilitate the installation of the driven wheel 222.

[0034] Further preferably, such as Figure 2 , the above-mentioned transmission shaft 241 adopts a segmented splicing form, including but not limited to configuring two or more coupling boxes 242, which is convenient for disassembly and assembly and can improve the tolerance of installation precision errors, and also ensures the ability of this transmission design to be applied to on-site renovation projects to pass through existing equipment. The above-mentioned transmission shaft 241 can further be configured with one or more transmission bearing seats 243 to ensure its working reliability.

[0035] Preferably, by designing the above-mentioned transmission unit 22, the requirements for enabling the tension roll 1 to have an active rotation mode and a passive rotation mode are met. In one embodiment, such as Figure 2 and Figure 4 , the above-mentioned transmission unit 22 further includes a rotation direction change controller, and the rotation direction change controller is respectively connected to the driven wheel 222 and the roll shaft 111, and is used to control whether the roll shaft 111 rotates following the driven wheel 222.

[0036] Among them, the driven wheel 222 is connected to the roll shaft 111 of the tension roll 1 through a driven wheel bearing.

[0037] In one embodiment, the rotation direction conversion controller includes a clutch 23. The driven part of the clutch 23 is connected to the passive wheel 222, and the driving part of the clutch 23 is connected to the roller shaft 111. Optionally, the clutch 23 is key-connected to the roller shaft 111 of the tension roller 1; the connection between the clutch 23 and the passive wheel 222 is a fixed connection, including but not limited to being connected by connection screws and torque transmission pins.

[0038] In addition, the rotation direction conversion controller and the passive wheel 222 can be clamped on the shoulder of the roller shaft 111 through a spigot to prevent axial displacement of the rotation direction conversion controller and the passive wheel 222.

[0039] Optionally, the above rotation direction conversion controller / clutch 23 uses hydraulic oil as the working medium. In one embodiment, as Figure 4 shown, a dual-channel oil rotary joint 230 is provided at the end of the roller shaft 111 of the tension roller 1 to meet the normal oil supply and oil return in the two rotation modes of the tension roller 1, so as to realize that the torque output by the first driving mechanism can flexibly match the different functional requirements of the tension roller 1. Among them, an oil inlet channel and an oil return channel are provided in the roller shaft 111, and the oil inlet channel and the oil return channel are communicated with the above rotation direction conversion controller and the above dual-channel oil rotary joint 230.

[0040] In one embodiment, the above driving unit uses a torque motor 21. On the one hand, in the passive rotation mode of the tension roller 1, if the rotation direction conversion controller fails, the torque motor 21 will be in a power generation state under the action of the reverse rotation passive torque, and the situation of damage to the torque motor 21 will not occur; on the other hand, in the active rotation mode of the tension roller 1, the torque motor 21 can adaptively output the torque for driving the rotation of the tension roller 1 according to the shaft power of the load end. Once the tension roller 1 is jammed or the rotation direction conversion controller fails, the torque motor 21 will actively control the maximum output torque, so as to ensure that the motor 21 is not burned out due to overload, and it can also ensure that the failure of other transmission components will not deteriorate further, leaving a certain processing time for maintenance personnel to ensure the long life and high utilization rate of each transmission device.

[0041] Embodiment 2

[0042] The embodiment of the present invention provides a tension roller device. Among them, this tension roller device can be used to optimize the tension roller device in the first embodiment above, that is, it can be a further structural optimization based on the tension roller device in the first embodiment above.

[0043] As Figures 1-3, The tension roller device includes a tension roller 1 and a first driving mechanism. Further, it also includes a second driving mechanism for driving the tension roller 1 to move between a working position and a maintenance position, which facilitates operations such as inspection and maintenance of the tension roller 1.

[0044] In one embodiment, as Figure 2 and Figure 3 , the second driving mechanism includes a rocker arm and a rocker arm driving unit 33. The tension roller 1 is installed on the rocker arm, and the rocker arm driving unit 33 is connected to the rocker arm for driving the rocker arm to swing around a swing axis, thereby driving the tension roller 1 to swing to realize the movement of the tension roller 1 between the working position and the maintenance position. Among them, the swing axis is parallel to the axis of the tension roller 1 and has a spacing.

[0045] As Figure 2 , preferably, the above rocker arm includes two arm rods 31 arranged in parallel at intervals. The two side roller shafts 111 of the tension roller 1 are respectively rotatably installed on the two arm rods 31; the two arm rods 31 can be connected in series through a rocker arm connecting beam 32. Specifically, the two arm rods 31 are fixedly installed on the rocker arm connecting beam 32. In this case, the rocker arm connecting beam 32 can be connected to the rocker arm driving unit 33. Among them, the axis of the rocker arm connecting beam 32 coincides with the above swing axis; both ends of the rocker arm connecting beam 32 can be supported by rocker arm bearing seats.

[0046] When the transmission unit 22 of the first driving mechanism adopts a belt drive / chain drive mode, the above swing axis can be set to coincide with the axis of the driving wheel 221, which can avoid the loosening of the chain / belt during the swing of the tension roller 1 and can correspondingly improve the transmission accuracy.

[0047] The above rocker arm driving unit 33 can adopt linear driving devices such as hydraulic cylinders and air cylinders. The housing of the rocker arm driving unit 33 is hinged to the workshop foundation or installed on the tension roller frame, and the output end of the rocker arm driving unit 33 is hinged to the above rocker arm, for example, hinged to the above rocker arm connecting beam 32, and the axis of the hinge shaft is parallel to the above swing axis. Optionally, as Figure 2 and Figure 3 , one end of the rocker arm connecting beam 32 extends out of the corresponding side rocker arm bearing seat to form a rocker arm driving rod 321, and the rocker arm driving rod 321 is connected to the rocker arm driving unit 33.

[0048] In one embodiment, as Figure 3, the above-mentioned tension roll device further includes a locking mechanism for locking the swing arm in the maintenance position to ensure the safety of the maintenance operation of the tension roll 1. Optionally, the above-mentioned locking mechanism includes a pin cylinder 341 and a safety pin 342. The safety pin 342 is arranged at the output end of the pin cylinder 341. Correspondingly, a pin hole is arranged on the swing arm, including but not limited to arranging the pin hole on the above-mentioned swing arm drive rod 321; the installation position of the pin cylinder 341 obviously matches the position of the pin hole at the maintenance position.

[0049] Among them, preferably, as Figure 3 , the tension roll device includes a frame, and the above-mentioned swing arm bearing seat and other equipment can be installed on this frame, and the above-mentioned pin cylinder 341 can also be arranged on this frame.

[0050] Among them, preferably, as Figure 2 and Figure 3 , the swing arm drive rod 321 is designed as a flange structure, that is, it has a flange portion 3211, and the above-mentioned pin hole is arranged on this flange portion 3211, which can facilitate the cooperation with the above-mentioned safety pin 342, and correspondingly shorten the working stroke of the pin cylinder 341.

[0051] In one embodiment, a swing arm cooling structure is provided inside the swing arm connecting beam 32, which can compensate for the thermal expansion and contraction of materials at different temperatures and extend the service life of the swing arm. Optionally, as Figure 7 , a water cooling cavity is formed inside the swing arm connecting beam 32, and a cooling core tube 322 is arranged in this water cooling cavity. The outlet end of the cooling core tube 322 is communicated with the water cooling cavity. One end of the swing arm connecting beam 32 / swing arm drive rod 321 is provided with a swing arm rotary joint 33. A cooling water inlet communicated with the inlet end of the cooling core tube 322 and a cooling water outlet communicated with the water cooling cavity are arranged on the swing arm rotary joint 33. Among them, the above-mentioned cooling core tube 322 can adopt a multi-segment series connection structure, and the core tube segments can be connected through a flexible connector 3221.

[0052] Embodiment Three

[0053] The embodiment of the present invention provides a tension roll 1. Among them, this tension roll 1 can be used in the above-mentioned Embodiment One / Embodiment Two.

[0054] As Figures 4-6 , the above-mentioned tension roll 1 includes a roll body 10, a drive side shaft head and an operation side shaft head. Tension roll bearing seats are respectively configured on the drive side shaft head and the operation side shaft head. When applied to the above-mentioned Embodiment Two, the above-mentioned arm rod 31 can correspondingly be configured as a tension roll bearing seat, or a bearing seat upper cover is arranged on the shaft head 12, and a bearing seat base is arranged on the above-mentioned arm rod 31, and the two are assembled to form a split bearing seat.

[0055] Preferably, a heat-resistant and wear-resistant layer 101 is provided on the outer surface of the roll body 10, which can correspondingly extend the service life of the tension roll 1. The heat-resistant and wear-resistant layer 101 includes, but is not limited to, a surfacing layer structure, for example, it is made by surfacing with heat-resistant stainless steel material. Optionally, the thickness of the heat-resistant and wear-resistant layer 101 is in the range of 10-40 mm. For the heat-resistant and wear-resistant surfacing layer, its thickness can be controlled at about 25 mm.

[0056] Preferably, a roll body cooling structure is provided inside the roll body 10, which can cool the roll body 10 and greatly extend the service life of the tension roll 1, including the life of the roll body 10 and the life of the roller bearings 113 at both ends, etc.

[0057] In one embodiment, as Figure 4 and Figure 5 , the roll body cooling structure includes an inner bladder 13 provided inside the roll body 10 and enclosing a heat insulation zone with the inner wall of the roll body, and a flow guide 15 provided in the heat insulation zone. A cooling medium channel communicating with the heat insulation zone is provided on the drive side shaft head and / or the operating side shaft head.

[0058] Among them, the above cooling medium channel includes a medium supply channel and a medium return channel. By supplying a cooling medium into the heat insulation zone to take away the heat of the roll body 10, the cooling of the roll body 10 can be realized. Preferably, through the setting of the above flow guide 15, the cooling medium in the heat insulation zone is kept in a turbulent state, and this state can improve the heat exchange efficiency. In one embodiment, as Figure 5 , the above flow guide 15 adopts a spiral flow guide 15 to make the cooling medium flow spirally in the heat insulation zone; further preferably, the spiral angle α of the spiral flow guide 15 relative to the axis of the roll body 10 is 55-60°, which is beneficial to realizing the above turbulent state. In particular, the height h of the above heat insulation zone (that is, the distance between the inner bladder 13 and the roll body 10) is in the range of 60-80 mm. When the cooling medium is cooling water, the Reynolds coefficient Re of the cooling water can be made >4000, and the cooling water in this state is basically in a turbulent state, so as to improve the heat exchange efficiency.

[0059] The spiral flow guide 15 can be fixed on the inner bladder 13, or fixed on the roll body 10, or fixed to the inner bladder 13 and the roll body 10 respectively.

[0060] The above inner bladder 13 is preferably a closed hollow structure, which can not only reduce the weight of the tension roll 1, but also has a good heat insulation effect and can further extend the service life of the tension roll 1. Based on the multiple heat insulation structure of the roll body 10 - heat insulation zone - inner bladder 13 and the coupled cooling effect in the heat insulation zone, it can greatly ensure that the heat of the roll body 10 will not be transferred to the roller bearings 113 at both ends of the shaft head 12, thereby extending the life of the roll body 10, the shaft head 12 and the roller bearings 113.

[0061] In one embodiment, as Figures 4-6 , the above-mentioned medium supply channel includes a water inlet pipe 14, which extends into the roll body 10 through the drive side shaft head or the operating side shaft head and communicates with the above-mentioned heat insulation belt; further, the water inlet pipe 14 passes through the inner tank 13, so that the installation of the inner tank 13 can be realized through the water inlet pipe 14, and at the same time, the arrangement of the water inlet pipe 14 is also facilitated.

[0062] Among them, preferably, there is a gap between the inner tank 13 and the two end shaft heads 12 and correspondingly an end heat insulation cavity is enclosed. This gap can be the same as or different from the height of the heat insulation belt; the outlet end of the water inlet pipe 14 preferably extends into one of the end heat insulation cavities, and the above-mentioned medium return channel preferably communicates with the other end heat insulation cavity.

[0063] Optionally, as Figure 4 and Figure 5 , there is a gap between the water inlet pipe 14 and the inner wall of the corresponding side shaft head 12 to form the above-mentioned medium return channel. In this way, the water inlet and return water on the same side can facilitate the circulation management of the cooling water. Among them, a return water pipe is connected to the corresponding side shaft head 12, and the return water pipe communicates with the above-mentioned medium return channel.

[0064] Embodiment 4

[0065] The embodiment of the present invention provides a tension roll 1, among which, the tension roll 1 can be used in the above-mentioned Embodiments 1 to 3.

[0066] As Figure 5 and Figure 6 , the above-mentioned tension roll 1 includes a roll body 10, a drive side shaft head and an operating side shaft head. Roller bearings 113 and roller bearing seats 112 are assembled on both the drive side shaft head and the operating side shaft head. Among them, a roller rotary joint is connected to the drive side shaft head and / or the operating side shaft head.

[0067] In the structure where the tension roll bearing seat adopts a split bearing seat, the above-mentioned roller bearing seat 112 can correspondingly adopt the structural form of a bearing upper cover.

[0068] Optionally, at least one of the roller bearing seats 112 is a combined seal type bearing seat. A first seal structure is provided on one side of the combined seal type bearing seat close to the roll body 10, and a second seal structure is provided on the side far from the roll body 10.

[0069] In one embodiment, as Figure 5 and Figure 6 , the first seal structure includes a bearing skeleton oil seal 161, and the bearing skeleton oil seal 161 can be assembled to the bearing seat 112 through a split gland 162. Further, a waterproof cover 163 can be provided outside the split gland.

[0070] In one embodiment, as Figure 5 and Figure 6 , on one side of the combined sealed bearing housing away from the roll body 10, a limiting collar 114 is provided. The limiting collar 114 is fixedly connected to the corresponding shaft head 12 and abuts against the combined sealed bearing housing. The limiting collar 114 can not only limit the axial displacement of the bearing housing 112 and the roller bearing 113, but also play a role in waterproofing and dustproofing.

[0071] Preferably, as Figure 5 and Figure 6 , the second sealing structure includes a first inner seal 165. The first inner seal 165 includes, but is not limited to, a lip-type oil seal, which is pressed between the limiting collar 114 and the shaft head 12 (correspondingly, a sealing shoulder can be machined on the shaft head 12).

[0072] As Figure 5 and Figure 6 , a locking nut 164 can be screwed onto the corresponding shaft head 12. The locking nut 164 abuts against the corresponding roller bearing 113, which can not only limit the axial displacement of the roller bearing 113, but also play a sealing role.

[0073] Among them, when a roller rotary joint is connected to the corresponding shaft head 12, the roller rotary joint can be correspondingly configured as a mechanical seal and be part of the above second sealing structure.

[0074] In one embodiment, as Figure 5 and Figure 6 , the above roller rotary joint includes a sealing mandrel 15. The sealing mandrel 15 is fixedly connected to the corresponding shaft head 12. Further preferably, as Figure 5 and Figure 6 , the installation end of the sealing mandrel 15 adopts a stepped shaft inner ring wall. The large-diameter section 151 of the stepped shaft inner ring wall is closer to the roll body 10 than its small-diameter section. Preferably, the stepped surface of the stepped shaft inner ring wall abuts against the end face of the corresponding shaft head 12. An annular threaded hole is machined at the end of the corresponding shaft head. Threads are machined on the large-diameter section 151 and are screwed into the annular threaded hole.

[0075] Optionally, fasteners such as long bolts can be used to further fixedly connect the sealing mandrel 15 and the corresponding shaft head 12. Taking the long bolt as an example, the long bolt passes through the stepped surface of the above stepped shaft inner ring wall and the end face of the corresponding shaft head 12.

[0076] Further preferably, as Figure 5 and Figure 6, the second sealing structure includes a second inner seal 166 which is arranged between the outer wall of the sealing mandrel 15 and the large-diameter annular wall of the annular threaded hole. The second inner seal 166 includes, but is not limited to, a trapezoidal dust seal.

[0077] By the cooperation of the above first sealing structure and the second sealing structure, a multiple combined seal of protective seal + skeleton seal + lip seal + mechanical seal can be formed to ensure that the working environment of the roller bearing 113 is free of water and dust.

[0078] Such as Figure 5 and Figure 6 , preferably, there is a mandrel gap between the sealing mandrel 15 and the limiting collar 114.

[0079] Preferably, when applied to the tension roller 1 in the above-mentioned Embodiment 3, a water collecting tank 17 is formed in the mandrel gap. The above-mentioned medium return channel is communicated with the water collecting tank 17, and the water collecting tank 17 is communicated with a water return pipe. The return water with increased water temperature enters the water collecting tank 17 through the communication of the medium return channel, and then flows into the water return pipe.

[0080] Accordingly, a water return port communicated with the above-mentioned water collecting tank 17 is arranged on the sealing mandrel 15.

[0081] In one embodiment, such as Figure 5 and Figure 6 , in the mandrel gap, at least one lip water seal 167 is respectively arranged on both sides of the water collecting tank 17. Based on this design, during the rotation of the tension roller 1, the return water can be prevented from entering the bearing housing 112 and long-lasting life dry oil lubrication seal can be injected. Moreover, the dry oil contaminated by water can be directly discharged to the outside of the tension roller 1 through the water collecting tank 17.

[0082] Further preferably, such as Figure 5 and Figure 6, a plurality of lip seals 167 are respectively arranged on both sides of the collecting trough 17. Preferably, the lip seals 167 on both sides are designed to be symmetrically arranged with respect to the collecting trough 17. For each lip seal 167 between the collecting trough 17 and the roll body 10, preferably, taking the orientation of the roll body 10 relative to the collecting trough 17 as the reference direction, among the lip seals 167 between the collecting trough 17 and the roll body 10, the lip direction of the lip seal 167 closest to the collecting trough 17 is opposite to this reference direction, and the lip directions of the remaining lip seals 167 are the same as this reference direction. For example, when the roll body 10 is located on the left side of the collecting trough 17 (for example, when the corresponding shaft head 12 is the operating side shaft head), the lip seal 167 closest to the collecting trough 17 is a right lip seal, and the rest are all left lip seals. Taking the example that there are four lip seals 167 on the left and right sides of the collecting trough 17 respectively, from left to right, it is arranged in the form of "left left left right + right left right right" according to the lip direction. This arrangement strategy of the lip seal 167 can greatly ensure that water does not enter the bearing housing 112, and while ensuring the dry oil lubricated lip seal, the excess dry oil can enter the bearing for lubrication, thereby improving the working reliability of the tension roll 1.

[0083] Further preferably, a water seal partition 168 is provided between every two adjacent lip seals 167, which can preferably prevent the deformation of the lip seal.

[0084] Further preferably, in the above-mentioned arrangement structure of the lip seals 167 in the form of "left left left right + right left right right", the water seal partitions 168 are arranged from left to right according to the following strategy: 1 left-handed oil inlet water seal partition - 1 left-handed water seal partition - 1 through-core oil inlet water seal partition - 1 through-core oil inlet water seal partition - 1 right-handed water seal partition - 1 right-handed oil inlet water seal partition. This way forms a flexible water seal combination, which can obtain a better effect of preventing the deformation of the lip seal; among them, the left-handed oil inlet water seal partition, the through-core oil inlet water seal partition and the right-handed oil inlet water seal partition, in addition to preventing the deformation of the lip seal, are also responsible for leading the dry oil to the surface of each lip seal, extending its service life.

[0085] Optionally, as Figure 5 and Figure 6 , a core shaft end cover 115 is detachably connected to the outer end of the limit shaft collar 114. Among them, the outermost lip seal 167 can be pressed by this core shaft end cover 115. An inlet and / or outlet for cooling water can be provided on this core shaft end cover 115 to facilitate the design of the inlet and outlet of the cooling water.

[0086] Embodiment Five

[0087] An embodiment of the present invention provides a Steckel rolling production line, which includes a coiling furnace, an entry pinch roll, and an exit pinch roll. A tension roll device is arranged between the coiling furnace and the entry pinch roll and / or between the coiling furnace and the exit pinch roll. Among them, at least one set of the tension roll devices adopts the tension roll device in the above-mentioned Embodiment 1 / Embodiment 2, or adopts the tension roll 1 in the above-mentioned Embodiment 3 / Embodiment 4.

[0088] Among them, preferably, the above-mentioned Steckel rolling production line is a production line that can perform both coil rolling and flat rolling.

[0089] Correspondingly, a production method of the above-mentioned Steckel rolling production line is also provided, including:

[0090] In the coil rolling production mode, the tension roll 1 adopts a passive rotation mode, and in the flat rolling production mode, the tension roll 1 adopts an active rotation mode.

[0091] In the flat rolling mode, the tension roll 1 rotates actively and continuously, which can evenly distribute the high temperature over the entire circumference of the tension roll 1, effectively extending the service life of the tension roll 1.

[0092] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tension roller device, characterized in that: It includes a tension roller and a first driving mechanism, wherein the first driving mechanism is configured to enable the tension roller to have an active rotation mode and a passive rotation mode: in the active rotation mode, the first driving mechanism drives the tension roller to actively rotate; in the passive rotation mode, the tension roller is configured as a passive tension roller.

2. The tension roller device according to claim 1, characterized in that: The first driving mechanism includes a driving unit and a transmission unit, and the transmission unit is connected to the tension roller and the driving unit respectively; Wherein, the transmission unit comprises a driving wheel and a driven wheel which are matched with each other for transmission, the driving wheel is connected to the output shaft of the driving unit, and the driven wheel is connected to the roller shaft of the tension roller.

3. The tension roller device according to claim 2, characterized in that: The transmission unit further comprises a rotation direction conversion controller, which is respectively connected to the driven wheel and the roller shaft and is used to control whether the roller shaft rotates along with the driven wheel.

4. The tension roller device according to claim 3, characterized in that: The rotation direction conversion controller comprises a clutch, a driven part of the clutch is connected to the driven wheel, and an active part of the clutch is connected to the roller shaft.

5. The tension roller device according to claim 3, characterized in that: A dual-channel oil rotary joint is arranged at the roller shaft end of the tension roller, and an oil inlet channel and an oil return channel are arranged in the roller shaft. The oil inlet channel and the oil return channel are both connected to the rotation direction conversion controller and the dual-channel oil rotary joint.

6. The tension roller device according to claim 2, characterized in that: The driving unit adopts a torque motor.

7. The tension roller device according to claim 1, characterized in that: The tension roller device also includes a second driving mechanism for driving the tension roller to move between a working position and a maintenance position.

8. A furnace coil production line, comprising a coiling furnace, an inlet pinch roller and an outlet pinch roller, a tension roller device is arranged between the coiling furnace and the inlet pinch roller and / or between the coiling furnace and the outlet pinch roller, characterized in that: At least one group of the tension roller devices adopts the tension roller device according to any one of claims 1 to 7.

9. The furnace coil production line according to claim 8, characterized in that: The Steckel production line has a coil rolling production mode and a flat rolling production mode.

10. The production method of the furnace coil production line according to claim 9, characterized in that: The method comprises: In the coiling production mode, the tension roller adopts a passive rotation mode, and in the flat rolling production mode, the tension roller adopts an active rotation mode.

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