A hot rolling coiler mandrel

Abstract

The present invention belongs to the technical field of hot-rolled coil coiling machines, and in particular relates to a mandrel of a hot-rolled coil coiling machine, which includes a core shaft, a hollow shaft, a plurality of segment plates, and a plunger body disposed between the core shaft and the plurality of segment plates. A trapezoidal groove is formed in the shaft wall of the core shaft. The top of the plunger body is fixedly connected to the inner wall of the segment plate, and the bottom of the plunger body is slidably disposed at the bottom of the trapezoidal groove. It further includes: a plurality of pressure detection mechanisms. By setting up pressure detection mechanisms, lubricant spraying mechanisms, and mandrel diameter measuring mechanisms, the present invention can monitor the extrusion pressure between the segment plates and the hot-rolled coil in real time, automatically spray lubricant when the pressure is too high to reduce friction, reduce wear, avoid winding defects, and cool the equipment. It can also accurately measure the mandrel diameter to predict the wear trend, count the wear frequency of the segment plates, and alarm for maintenance when the wear risk is high, ensuring the stability and reliability of the equipment operation.

Description

Technical Field

[0001] The invention belongs to the technical field of coiling machines for hot-rolled coil plates, and particularly relates to a coiling drum of a hot-rolled coiling machine. Background Art

[0002] As an important industrial raw material, hot-rolled coil plates are widely used in various industries. With the rapid development of these industries, the demand for hot-rolled coil plates is also increasing continuously. During the production of hot-rolled coil plates, the coiling machine is an important auxiliary equipment in the rolling mill workshop.

[0003] The coiling machine is installed at the tail of the hot continuous rolling hot-rolled coil plate rolling line and is used to coil the hot-rolled coil plate products at the coiling temperature into finished coils for easy coiling, bundling, loading, unloading and transportation of the hot-rolled coil plates. The coiling drum is the core component of the coiling machine and plays a decisive role in the coiling process. For example, publication number: CN103894446B discloses a coiling drum of a hot-rolled coiling machine. The existing coiling drum is mainly composed of a mandrel and a plurality of segment plates. The segment plates are in direct contact with the surface of the hot-rolled coil plate. During the coiling process, it not only has to bear the coiling tension of the hot-rolled coil plate to ensure that the hot-rolled coil plate is tightly and stably wound around the coiling drum, but also has to cope with the huge frictional force generated by the high-speed movement of the hot-rolled coil plate. As production continues, the segment plates are subjected to high-intensity friction and tension for a long time, and the wear problem becomes more prominent. It not only affects the coiling quality of the coiling drum, resulting in poor coil shape of the hot-rolled coil plate and increasing the defective rate, but also reduces the service life of the coiling drum, causing a significant increase in the equipment maintenance cost.

[0004] Therefore, a coiling drum of a hot-rolled coiling machine is proposed. Summary of the Invention

[0005] The purpose of the invention is to provide a coiling drum of a hot-rolled coiling machine for the above problems.

[0006] To achieve the above purpose, the invention adopts the following technical solutions: A coiling drum of a hot-rolled coiling machine includes a mandrel, a hollow shaft, a plurality of segment plates, and a plunger body disposed between the mandrel and the plurality of segment plates. A trapezoidal groove is formed in the shaft wall of the mandrel. The top of the plunger body is fixedly connected to the inner wall of the segment plate, and the bottom of the plunger body is slidably disposed at the bottom of the trapezoidal groove. It further includes:

[0007] A plurality of pressure detection mechanisms are respectively disposed on the surfaces of the plurality of segment plates for detecting the extrusion force between the plurality of segment plates and the hot-rolled coil plate;

[0008] A lubricant spraying mechanism is disposed between one end of the mandrel and the plurality of segment plates for lubricating and cooling the surfaces of the plurality of segment plates;

[0009] The drum diameter measuring mechanism is fixedly arranged on the outer wall of the hollow shaft, and the pulling end of the drum diameter measuring mechanism is fixedly connected to the inner side surface of one of the sector plates;

[0010] The PLC controller is fixedly arranged on the side wall of the coiler. The pressure detection mechanism, the lubricant spraying mechanism and the drum diameter measuring mechanism are all electrically connected to the PLC controller.

[0011] Preferably, a fixed disk is fixedly arranged on the inner wall of one end of the hollow shaft. A square insertion rod is fixedly arranged in the middle of the fixed disk. A square slot which is in insertion fit with one end of the square insertion rod is arranged at one end of the core shaft. A driving connection disk is fixedly arranged at the end of the square insertion rod far away from the core shaft. A hydraulic cylinder connection head is fixedly arranged at the end of the core shaft far away from the driving connection disk.

[0012] Preferably, the pressure detection mechanism includes a fixed sleeve fixedly arranged inside the sector plate. An extrusion head is arranged inside the fixed sleeve. A sliding seal sleeve is arranged between the extrusion head and the fixed sleeve. One end of the extrusion head passes through the inside of the sector plate and extends outwards. An elastic telescopic rod is fixedly arranged inside the fixed sleeve. The movable end of the elastic telescopic rod is fixedly provided with a high-temperature ceramic pressure sensor which is in contact with one end of the extrusion head. An overpressure frequency counting mechanism is arranged inside the fixed sleeve.

[0013] Preferably, the overpressure frequency counting mechanism includes a touch switch fixedly arranged inside the fixed sleeve. The touch head of the touch switch can be in contact with the extrusion head. A pulse counter, a wireless communication module and a storage battery are fixedly arranged on the inner wall of the fixed sleeve. The touch switch is electrically connected to the pulse counter. The pulse counter, the wireless communication module and the storage battery are all electrically connected to the PLC controller.

[0014] Preferably, the lubricant spraying mechanism includes a high-temperature resistant elastic rubber tube fixedly arranged between the hydraulic cylinder connection head and the plurality of sector plates. The plurality of sector plates and the hydraulic cylinder connection head all adopt a hollow structure. A plurality of uniformly distributed spraying holes are arranged on the outer surface of the plurality of sector plates. A liquid supply pipe is fixedly arranged on one side of the hydraulic cylinder connection head. One end of the liquid supply pipe is fixedly provided with a lubricant rotary joint. The lubricant rotary joint is connected to an external lubricant pump body. Solenoid valves are arranged on the pipe walls of the plurality of high-temperature resistant elastic rubber tubes.

[0015] Preferably, the drum diameter measuring mechanism includes a high-temperature resistant measuring box body fixedly arranged on the outer wall of the hollow shaft. A measuring resistance rod is horizontally and fixedly arranged inside the high-temperature resistant measuring box body. A measuring conductive sleeve is slidably arranged on the rod wall of the measuring resistance rod. A sliding block is fixedly arranged on the outer wall of the measuring conductive sleeve, and both sides of the sliding block are slidably arranged with the inner walls on both sides of the high-temperature resistant measuring box body. Symmetrically fixed with two reset springs between one side of the sliding block and the inner wall of the high-temperature resistant measuring box body, and a pulling rope is fixedly arranged on the other side of the sliding block. One end of the pulling rope away from the sliding block extends to the outside of the high-temperature resistant measuring box body, and one end of the pulling rope is fixedly connected with the inner side surface of the sector plate.

[0016] Preferably, the bottom of the trapezoidal groove is an inclined surface, the bottom of the plunger body matches the bottom of the trapezoidal groove, a limiting rod is fixedly arranged inside the trapezoidal groove, and the plunger body is slidably connected with the limiting rod.

[0017] Preferably, both between the top of the plunger body and the inner side surface of the sector plate and between the fixed sleeve and the inner side surface of the sector plate are fixedly connected by bolts.

[0018] Compared with the existing technology, the beneficial effects of the present invention are as follows:

[0019] Through the set drum diameter measuring mechanism, the drum diameter can be accurately measured in real time. By using the correlation between the movement of the sector plate and the sliding of the measuring conductive sleeve on the measuring resistance rod, the resistance change is converted into an electric current signal and transmitted to the PLC controller. The movement distance of the sector plate is calculated through the internal program, so as to obtain the winding diameter of the drum. The staff can set the threshold in advance, predict the extrusion force and wear trend between the hot-rolled coil and the sector plate according to the drum diameter, and then adjust the equipment operation parameters. For example, when the diameter is large, the pressure detection threshold is reduced, and the lubrication protection measure is started in advance to ensure the stable coiling quality.

[0020] Through the set pressure detection mechanism, the pressure detection mechanism is distributed on the surface of the sector plate, and the extrusion force between the hot-rolled coil and the sector plate can be monitored in real time. When the high-temperature ceramic pressure sensor detects that the pressure value reaches the preset threshold, the PLC controller immediately starts the lubricant pump body, and conveys the lubricant between the hot-rolled coil and the sector plate through the lubricant spraying mechanism. This not only reduces the friction coefficient between the two, reduces equipment wear and extends the service life, but also avoids coiling defects caused by excessive friction, such as surface scratches and wrinkles. At the same time, the lubricant takes away heat and prevents material property changes and equipment deformation caused by too high temperature.

[0021] Through the set overpressure frequency counting mechanism, the frequency of the large extrusion wear of the sector plate can be counted. When the high-temperature ceramic pressure sensor detects excessive pressure, the extrusion head presses the touch switch to generate a pulse signal, and the pulse counter counts and transmits the result to the PLC controller. If the count reaches a certain value, the built-in alarm of the PLC controller is activated, reminding the staff to timely repair the sector plate with a high wear risk, avoiding the expansion of the fault, ensuring the continuous and stable operation of the equipment, and reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view of a coiler drum of a hot rolling coiler provided by the present invention;

[0023] Figure 2 is a schematic end face structure view of a coiler drum of a hot rolling coiler provided by the present invention;

[0024] Figure 3 is a perspective view of a cut-open coiler drum of a hot rolling coiler provided by the present invention;

[0025] Figure 4 is a perspective view of a pressure detection mechanism and an overpressure frequency counting mechanism of a coiler drum of a hot rolling coiler provided by the present invention;

[0026] Figure 5 is a perspective view of a fixed sleeve, an extrusion head and a sliding seal sleeve of a coiler drum of a hot rolling coiler provided by the present invention;

[0027] Figure 6 is a perspective view of a drum diameter measuring mechanism of a coiler drum of a hot rolling coiler provided by the present invention.

[0028] In the figure: 1 mandrel, 2 hollow shaft, 3 sector plate, 4 plunger body, 5 trapezoidal groove, 6 pressure detection mechanism, 61 fixed sleeve, 62 extrusion head, 63 sliding seal sleeve, 64 elastic telescopic rod, 65 high-temperature ceramic pressure sensor, 7 lubricant spraying mechanism, 71 high-temperature resistant elastic rubber tube, 72 spraying hole, 73 liquid supply pipe, 74 lubricant rotary joint, 75 solenoid valve, 8 drum diameter measuring mechanism, 81 high-temperature resistant measuring box body, 82 measuring resistance rod, 83 measuring conductive sleeve, 84 sliding block, 85 return spring, 86 pulling rope, 9 PLC controller, 10 fixed disk, 11 square insertion rod, 12 square slot, 13 driving connection disk, 14 hydraulic cylinder connection head, 15 overpressure frequency counting mechanism, 151 touch switch, 152 pulse counter, 153 wireless communication module, 154 storage battery, 16 limiting rod. DETAILED DESCRIPTION OF THE INVENTION

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0030] As shown Figures 1-6 in the figure, a coiler mandrel for a hot rolling mill includes a core shaft 1, a hollow shaft 2, a plurality of segment plates 3, and a plunger body 4 disposed between the core shaft 1 and the plurality of segment plates 3. A trapezoidal groove 5 is formed in the shaft wall of the core shaft 1. The top of the plunger body 4 is fixedly connected to the inner wall of the segment plate 3, and the bottom of the plunger body 4 is slidably disposed at the bottom of the trapezoidal groove 5. The bottom of the trapezoidal groove 5 is an inclined surface, and the bottom of the plunger body 4 is matched with the bottom of the trapezoidal groove 5. A limiting rod 16 is fixedly disposed inside the trapezoidal groove 5, and the plunger body 4 is slidably connected to the limiting rod 16. The limiting rod 16 can increase the connection stability between the plunger body 4 and the trapezoidal groove 5, so that the plunger body 4 and the trapezoidal groove 5 will not be separated. It further includes:

[0031] A fixed disk 10 is fixedly disposed on the inner wall of one end of the hollow shaft 2. A square insertion rod 11 is fixedly disposed in the middle of the fixed disk 10. A square insertion slot 12 is formed at one end of the core shaft 1 and is in plug-in fit with one end of the square insertion rod 11. A driving connection disk 13 is fixedly disposed at the end of the square insertion rod 11 away from the core shaft 1. A hydraulic cylinder connector 14 is fixedly disposed at the end of the core shaft 1 away from the driving connection disk 13. When the hydraulic cylinder system of the coiler is started, the hydraulic cylinder system precisely pulls or pushes the hydraulic cylinder connector 14 according to the instruction. As the hydraulic cylinder connector 14 moves, the core shaft 1 connected thereto moves smoothly in a straight line inside the hollow shaft 2. When the core shaft 1 moves, the limiting rod 16 at the bottom of the trapezoidal groove 5 will precisely pull or push the plunger body 4 downward or upward according to the moving direction of the core shaft 1. As a transmission component, the plunger body 4 pulls the segment plate 3 toward the core shaft 1 or pushes the segment plate 3 away from the core shaft 1 according to the action of the limiting rod 16.

[0032] A plurality of pressure detection mechanisms 6 are respectively arranged on the surfaces of a plurality of sector plates 3 for detecting the extrusion pressure between the plurality of sector plates 3 and the hot-rolled coil. The pressure detection mechanism 6 includes a fixed sleeve 61 fixedly arranged inside the sector plate 3. Both between the top of the plunger body 4 and the inner side surface of the sector plate 3 and between the fixed sleeve 61 and the inner side surface of the sector plate 3 are fixedly connected by bolts, so that the top of the plunger body 4 and the sector plate 3, and the fixed sleeve 61 and the sector plate 3 are detachable. When the sector plate 3 needs to be replaced due to large wear, the sector plate 3 can be directly disassembled, and at the same time, the pressure detection mechanism 6 is disassembled and removed together; an extrusion head 62 is arranged inside the fixed sleeve 61, and a sliding seal sleeve 63 is arranged between the extrusion head 62 and the fixed sleeve 61. One end of the extrusion head 62 passes through the inside of the sector plate 3 and extends outwards. An elastic telescopic rod 64 is fixedly arranged inside the fixed sleeve 61, and a high-temperature ceramic pressure sensor 65 in contact with one end of the extrusion head 62 is fixedly arranged at the mobile end of the elastic telescopic rod 64. The high-temperature ceramic pressure sensor 65 uses a high-temperature ceramic material to make the sensitive element. In an environment above 950 °C, the ceramic material has a stable structure and reliable performance, and can accurately measure the pressure, so that the high-temperature ceramic pressure sensor 65 is not interfered by high temperature. During the winding process, the hot-rolled coil will contact the extrusion head 62 on the surface of the sector plate 3, so that the extrusion head 62 is pressed into the inside of the fixed sleeve 61 under the action of external force. At the same time, the extrusion head 62 pushes the high-temperature ceramic pressure sensor 65 downwards, and the high-temperature ceramic pressure sensor 65 can indirectly detect the extrusion pressure of the hot-rolled coil on the sector plate 3; an overpressure frequency counting mechanism 15 is arranged inside the fixed sleeve 61. The overpressure frequency counting mechanism 15 includes a touch switch 151 fixedly arranged inside the fixed sleeve 61. The touch head of the touch switch 151 can be in contact with the extrusion head 62. A pulse counter 152, a wireless communication module 153 and a storage battery 154 are fixedly arranged on the inner wall of the fixed sleeve 61. The touch switch 151 is electrically connected to the pulse counter 152, and the pulse counter 152, the wireless communication module 153 and the storage battery 154 are all electrically connected to the PLC controller 9. The extrusion head 62 will squeeze the touch head of the touch switch 151, so that the touch head is pressed into the inside of the touch switch 151, and the touch switch 151 emits a pulse signal. The pulse counter 152 completes a counting action after receiving the pulse signal.

[0033] The lubricant spraying mechanism 7 is arranged between one end of the mandrel 1 and the multiple sector plates 3, and is used for lubricating and cooling the surfaces of the multiple sector plates 3. The lubricant spraying mechanism 7 includes a high-temperature resistant elastic rubber tube 71 fixedly arranged between the hydraulic cylinder connector 14 and the multiple sector plates 3. The high-temperature resistant elastic rubber tube 71 has strong elasticity and temperature resistance. When the sector plates 3 move, the high-temperature resistant elastic rubber tube 71 will freely expand and contract, and the flow of the lubricant is unobstructed. Both the multiple sector plates 3 and the hydraulic cylinder connector 14 adopt a hollow structure. A plurality of uniformly distributed spraying holes 72 are formed on the outer surfaces of the multiple sector plates 3. A liquid supply pipe 73 is fixedly arranged on one side of the hydraulic cylinder connector 14, and a lubricant rotary joint 74 is fixedly arranged at one end of the liquid supply pipe 73. The lubricant rotary joint 74 is connected to an external lubricant pump body. Electromagnetic valves 75 are arranged on the pipe walls of the multiple high-temperature resistant elastic rubber tubes 71. Starting the lubricant pump body can introduce the lubricant into the lubricant rotary joint 74 and the interior of the liquid supply pipe 73. After the lubricant enters the interior of the hydraulic cylinder connector 14, it is then discharged into the interior of the sector plates 3 through the liquid supply pipe 73. Finally, it is sprayed out through the multiple spraying holes 72 on the surfaces of the sector plates 3 and flows between the hot-rolled coil and the sector plates 3.

[0034] The reel diameter measuring mechanism 8 is fixedly arranged on the outer wall of the hollow shaft 2, and the pulling end of the reel diameter measuring mechanism 8 is fixedly connected to the inner side surface of one of the sector plates 3. The reel diameter measuring mechanism 8 includes a high-temperature resistant measuring box body 81 fixedly arranged on the outer wall of the hollow shaft 2. The high-temperature resistant measuring box body 81 is made of ceramic fiber material. Ceramic fiber is a commonly used high-temperature heat insulation material, such as zirconium-containing ceramic fiber, to avoid the influence of high-temperature conduction on the internal components during the process of winding the hot-rolled coil. A measuring resistance rod 82 is horizontally fixedly arranged inside the high-temperature resistant measuring box body 81. A measuring conductive sleeve 83 is slidably arranged on the rod wall of the measuring resistance rod 82. A sliding block 84 is fixedly arranged on the outer wall of the measuring conductive sleeve 83, and both sides of the sliding block 84 are slidably arranged on the inner side walls of both sides of the high-temperature resistant measuring box body 81. Two reset springs 85 are symmetrically and fixedly arranged between one side of the sliding block 84 and the inner wall of the high-temperature resistant measuring box body 81, and a pulling rope 86 is fixedly arranged on the other side of the sliding block 84. The end of the pulling rope 86 far away from the sliding block 84 extends to the outside of the high-temperature resistant measuring box body 81, and one end of the pulling rope 86 is fixedly connected to the inner side surface of the sector plate 3. When the sector plate 3 moves, the external force at one end of the pulling rope 86 is reduced or increased, so that the moving distance of the measuring conductive sleeve 83 on the measuring resistance rod 82 can be adjusted. When the sector plate 3 moves inward, the reset spring 85 applies an elastic force to the sliding block 84 to move it to the left. When the sector plate 3 moves outward, the sliding block 84 is made to move to the right against the elastic force of the reset spring 85.

[0035] The PLC controller 9 is fixedly installed on the side wall of the coiler. The pressure detection mechanism 6, the lubricant spraying mechanism 7, and the reel diameter measuring mechanism 8 are all electrically connected to the PLC controller 9.

[0036] The operating principle of the present invention is described as follows: The staff first installs the drive connection disk 13 on the drive shaft of the coiler and fixes it by means of bolt connection. Then, the hydraulic cylinder connector 14 is installed on the hydraulic cylinder system and fixed by means of a hydraulic rotary joint connection, which can achieve sealed transportation and hydraulic transmission, prevent fluid leakage, ensure the normal operation of the hydraulic cylinder system, and at the same time does not affect the rotation of the mandrel 1. During the installation of the hydraulic rotary joint, the supply pipe 73 passes through the inside of the hydraulic rotary joint and is connected to the external lubricant pump body through the lubricant rotary joint 74, and the installation is completed.

[0037] Before the hot-rolled coil winding operation, the staff needs to strictly follow the customer order information and product standards to accurately determine the final use and specification requirements of the hot-rolled coil. Different application scenarios have different requirements for the winding diameter of the hot-rolled coil. Taking the construction industry as an example, in order to consider the transportation convenience and the high efficiency of on-site construction, the hot-rolled coils used in this industry usually need to be controlled within a specific diameter range. The appropriate diameter can ensure that the coil will not be restricted due to its large size during transportation, and it is also convenient for handling and installation at the construction site. For the automotive manufacturing field, due to its extremely fine and complex subsequent processing technology, the diameter accuracy requirements for hot-rolled coils are extremely high. The precise winding diameter can ensure that the coil perfectly matches the molds and equipment in subsequent processes such as stamping and welding.

[0038] After determining the winding diameter requirements, the staff manually operates the PLC controller 9 to start the hydraulic cylinder system of the coiler. The hydraulic cylinder system, as the power source for the entire winding diameter adjustment, can accurately pull or push the hydraulic cylinder connector 14 according to the command. As the hydraulic cylinder connector 14 moves, the mandrel 1 connected to it moves smoothly in a straight line inside the hollow shaft 2. When the mandrel 1 moves, the limit rod 16 at the bottom of the trapezoidal groove 5 will accurately pull down or push up the plunger body 4 according to the moving direction of the mandrel 1. The plunger body 4, as a transmission component, pulls the sector plate 3 towards the mandrel 1 or pushes the sector plate 3 away from the mandrel 1 according to the action of the limit rod 16. Since a plunger body 4 is independently arranged between each sector plate 3 and the mandrel 1, this design ensures that during the movement of the mandrel 1, each sector plate 3 can move synchronously and stably. Through the coordinated action of each sector plate 3, the diameter of the reel can be accurately adjusted to fully meet the predetermined hot-rolled coil winding diameter requirements.

[0039] During the adjustment of the diameter of the reel, multiple sector plates 3 move synchronously, and one of the sector plates 3 is connected to one end of the pulling rope 86. When the sector plate 3 moves in the direction towards the mandrel 1, the external force exerted by the sector plate 3 on one end of the pulling rope 86 decreases. When the external force of the pulling rope 86 decreases, the elastic force applied by the return spring 85 to the sliding block 84 causes the sliding block 84 to move leftward inside the high-temperature resistant measuring box body 81. At the same time, the measuring conductive sleeve 83 moves leftward on the measuring resistance rod 82, causing the resistance value of the measuring resistance rod 82 connected in the circuit to decrease. Since a measuring circuit is set at both ends when the measuring resistance rod 82 is connected in the circuit, the measuring circuit amplifies and filters the measured current signal at both ends of the measuring resistance rod 82, and then sends it to the PLC controller 9 through the wireless communication module 153. After receiving the feedback electrical signal, the internal program of the PLC controller 9 can set the linear proportional correspondence relationship between the current value and the moving distance of the measuring conductive sleeve 83 through programming. For example, within the range of 30 mA to 40 mA, the PLC controller 9 will display the moving distance range of the measuring conductive sleeve 83 moving leftward on the display as 0 - 15 mm, which can indirectly measure the moving distance of the sector plate 3 towards the mandrel 1. When the sector plate 3 moves in the direction away from the mandrel 1, the sector plate 3 will act on one end of the pulling rope 86 outward, causing the sliding block 84 to move rightward against the elastic force of the return spring 85. At the same time, the measuring conductive sleeve 83 moves rightward on the measuring resistance rod 82, causing the resistance value of the measuring resistance rod 82 connected in the circuit to increase. The internal program of the PLC controller 9 again sets the linear proportional correspondence relationship between the current value and the moving distance of the measuring conductive sleeve 83 through programming. For example, within the range of 30 mA to 20 mA, the PLC controller 9 measures the moving distance of the measuring conductive sleeve 83 moving rightward as 0 - 15 mm, indirectly measuring the moving distance of the sector plate 3 away from the mandrel 1. Thus, it can measure the distance of the control sector plate 3 moving inwards or outwards, and then add the outer radius of the hollow shaft 2 and the thickness of the sector plate 3 (both the outer radius of the hollow shaft 2 and the thickness of the sector plate 3 are fixed values) to the moving distance of the sector plate 3. The final obtained data is the winding diameter of the reel (the common range is generally between 500 - 800 mm). The staff analyzes the diameter size of the reel and sets a threshold value inside the PLC controller 9 in advance. Generally, the larger the diameter of the hot rolling coiler reel, the greater the extrusion force between the hot rolled coil plate and the sector plate 3, and the greater the wear trend. On the contrary, the smaller the diameter of the hot rolling coiler reel, the smaller the wear trend. When the reel diameter is large, the staff appropriately reduces the set threshold value to detect in time the pressure changes that may cause excessive wear and initiate the lubrication protection measures in advance. Conversely, when the diameter of the hot rolling coiler reel is small, the set threshold value can be appropriately increased to slow down the initiation of the lubrication protection measures;

[0040] When it is necessary to wind the hot-rolled coil sheet, the staff manually operates the PLC controller 9 to start the coiler to work, so that the drive shaft of the coiler rotates and drives the mandrel 1 to rotate. Since the mandrel 1, the hollow shaft 2 and the multiple sector plates 3 are integrally arranged, they can rotate synchronously and wind the hot-rolled coil sheet on the surfaces of the multiple sector plates 3. During the winding process, the hot-rolled coil sheet will contact the extrusion head 62 on the surface of the sector plate 3, so that the extrusion head 62 is pressed into the interior of the fixed sleeve 61 under the action of an external force. At the same time, the extrusion head 62 pushes the high-temperature ceramic pressure sensor 65 downward, so that the high-temperature ceramic pressure sensor 65 moves downward against the elastic telescopic rod 64. At this time, the high-temperature ceramic pressure sensor 65 can indirectly detect the extrusion force of the hot-rolled coil sheet on the sector plate 3 (the greater the extrusion force, the greater the friction force and the greater the wear of the sector plate 3). The high-temperature ceramic pressure sensor 65 sends the detected pressure value to the PLC controller 9 through the wireless communication module 153 (the wireless communication module 153 uses a wireless Bluetooth transmission module, and a wireless Bluetooth receiving module corresponding to the wireless Bluetooth module is arranged inside the PLC controller 9). When the pressure value detected by the high-temperature ceramic pressure sensor 65 reaches the threshold preset inside the PLC controller 9, the PLC controller 9 will immediately start the lubricant pump body, and the lubricant pump body can introduce lubricant (synthetic high-boiling lubricant so that the lubricant will not be evaporated due to high temperature) into the lubricant rotary joint 74 and the liquid supply pipe 73. After the lubricant enters the interior of the hydraulic cylinder connector 14, it is then discharged into the interior of the sector plate 3 through the liquid supply pipe 73. Finally, it is sprayed out through the multiple spray holes 72 on the surface of the sector plate 3 and flows between the hot-rolled coil sheet and the sector plate 3. Since the multiple spray holes 72 are arranged on one side of the surface of the sector plate 3, with the high-speed forward rotation of the mandrel 1, the hollow shaft 2 and the multiple sector plates 3, the liquid flowing out of the surface of the sector plate 3 has a certain mass. According to Newton's first law, an object has the inertia to maintain its original motion state. In the case of high-speed rotation, the inertia of the liquid makes it tend to move away from the axis along the tangent direction. This tendency is manifested as centrifugal force, which can spread the lubricant better and evenly between the hot-rolled coil sheet and the sector plate 3 by virtue of the rotational force. Since a pressure detection mechanism 6 is arranged on the surface of each sector plate 3, during the winding process, the extrusion force of the hot-rolled coil sheet on the surface of each sector plate 3 is different. When the extrusion force received by the sector plate 3 reaches the threshold, the corresponding solenoid valve 75 is opened through the PLC controller 9. Moreover, for other sector plates 3 that do not reach the threshold, the solenoid valve 75 does not need to be turned on. The lubricant effectively reduces the friction coefficient between the hot-rolled coil sheet and the sector plate 3, helps to reduce the wear of the equipment and extend the service life. At the same time, it can also make the winding process smoother and avoid winding defects caused by excessive friction, such as surface scratches and wrinkles. In addition, the lubricant can take away part of the heat and play a cooling role, which helps to reduce the temperature of the coil sheet and the sector plate 3 and prevent problems such as material property changes and equipment deformation caused by too high temperature, and extends the service life;

[0041] When the pressure value detected by the high-temperature ceramic pressure sensor 65 reaches the threshold (indicating that the extrusion force on the sector plate 3 is too large, resulting in frictional wear), the extrusion head 62 will squeeze the touch head of the touch switch 151, causing the touch head to press into the interior of the touch switch 151. The touch head moves into the touch switch 151 against the elastic force of the elastic element. As the touch head moves, the moving contact connected to it also moves accordingly. When the touch head is pressed into a certain position, the moving contact contacts the static contact, thereby conducting the circuit. This conduction state generates a change in the electrical signal, and this signal can be received and recognized as a pulse signal by the pulse counter 152. After receiving the pulse signal, the pulse counter 152 completes a counting operation. Then, the pulse counter 152 sends the counting result to the PLC controller 9 through the wireless communication module 153 (the wireless communication module 153 uses a wireless Bluetooth transmission module, and a wireless Bluetooth receiving module corresponding to the wireless Bluetooth module is provided inside the PLC controller 9). The PLC controller 9 will display a counting operation on the display, so as to be able to count the frequency of each sector plate 3 being subjected to large extrusion wear. When the counting result reaches a certain value (for example, 100 times), it is very likely to indicate that the sector plate 3 at this position has a large degree of wear and there is a high risk of damage. The built-in alarm of the PLC controller 9 is activated to remind the staff to repair the sector plate 3 at this position.

[0042] 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 within the protection scope of the present invention.

Claims

1. A hot rolling coiler reel, comprising a mandrel (1), a hollow shaft (2), a plurality of sector plates (3), and a plunger body (4) arranged between the mandrel (1) and the plurality of sector plates (3), wherein the shaft wall of the mandrel (1) is provided with a trapezoidal groove (5), the top of the plunger body (4) is fixedly connected to the inner wall of the sector plate (3), and the bottom of the plunger body (4) is slidably arranged at the bottom of the trapezoidal groove (5), characterized in that: Also includes: A plurality of pressure detection mechanisms (6) are respectively arranged on the surfaces of the plurality of sector plates (3) and are used to detect the extrusion pressure between the plurality of sector plates (3) and the hot-rolled coil; a lubricant spraying mechanism (7), arranged between one end of the core shaft (1) and the plurality of sector plates (3), and used for lubricating and cooling the surfaces of the plurality of sector plates (3); A roll diameter measuring mechanism (8) is fixedly arranged on the outer wall of the hollow shaft (2), and a pulling end of the roll diameter measuring mechanism (8) is fixedly connected to the inner side surface of one of the sector plates (3); A PLC controller (9) is fixedly mounted on a side wall of the coiler, and the pressure detection mechanism (6), the lubricant spraying mechanism (7) and the coil diameter measuring mechanism (8) are all electrically connected to the PLC controller (9); A fixing plate (10) is fixedly provided on the inner wall of one end of the hollow shaft (2), a square plug rod (11) is fixedly provided in the middle of the fixing plate (10), one end of the mandrel (1) is provided with a square slot (12) which is plugged into and matched with one end of the square plug rod (11), one end of the square plug rod (11) away from the mandrel (1) is fixedly provided with a driving connection plate (13), and one end of the mandrel (1) away from the driving connection plate (13) is fixedly provided with a hydraulic cylinder connector (14); The lubricant spraying mechanism (7) comprises a high temperature resistant elastic rubber tube (71) fixedly arranged between the hydraulic cylinder connecting head (14) and the plurality of fan-shaped plates (3); the plurality of fan-shaped plates (3) and the hydraulic cylinder connecting head (14) are both hollow structures; the outer surfaces of the plurality of fan-shaped plates (3) are provided with a plurality of evenly distributed spray holes (72); a liquid supply pipe (73) is fixedly arranged on one side of the hydraulic cylinder connecting head (14); and a lubricant rotary joint (74) is fixedly arranged on one end of the liquid supply pipe (73); the lubricant rotary joint (74) is connected to an external lubricant pump body; and the tube walls of the plurality of high temperature resistant elastic rubber tubes (71) are each provided with an electromagnetic valve (75); The reel diameter measuring mechanism (8) comprises a high temperature resistant measuring box body (81) fixedly arranged on the outer wall of the hollow shaft (2), a measuring resistance rod (82) being fixedly arranged in the interior of the high temperature resistant measuring box body (81), a measuring conductive sleeve (83) being slidably arranged on the rod wall of the measuring resistance rod (82), a sliding block (84) being fixedly arranged on the outer wall of the measuring conductive sleeve (83), and two sides of the sliding block (84) being slidably arranged on the inner walls of two sides of the high temperature resistant measuring box body (81), two return springs (85) being symmetrically fixedly arranged between one side of the sliding block (84) and the inner wall of the high temperature resistant measuring box body (81), and a pulling rope (86) being fixedly arranged on the other side of the sliding block (84), one end of the pulling rope (86) away from the sliding block (84) extending to the outside of the high temperature resistant measuring box body (81), and one end of the pulling rope (86) being fixedly connected to the inner side surface of the sector plate (3); The roll diameter is accurately measured in real time by a roll diameter measuring mechanism (8). The resistance change is converted into a current signal and transmitted to a PLC controller (9) by utilizing the association between the movement of the sector plate (3) and the sliding of the measuring conductive sleeve (83) on the measuring resistor rod (82). The movement distance of the sector plate (3) is calculated by an internal program, thereby obtaining the roll winding diameter. The staff sets a preset threshold value of the pressure value in advance accordingly. When the diameter is large, the preset threshold value of the pressure value is reduced to start lubrication protection measures in advance. By setting a pressure detection mechanism (6), the squeezing force between the hot-rolled coil and the sector plate (3) is monitored in real time. When the detected pressure value reaches the preset threshold value, the PLC controller (9) immediately starts the lubricant pump body, and the lubricant is delivered to the space between the hot-rolled coil and the sector plate (3) through the lubricant spraying mechanism (7).

2. A hot rolling coiler reel according to claim 1, characterized in that: The pressure detection mechanism (6) comprises a fixed sleeve (61) fixedly arranged inside the sector plate (3), an extrusion head (62) being arranged inside the fixed sleeve (61), and a sliding sealing sleeve (63) being arranged between the extrusion head (62) and the fixed sleeve (61), one end of the extrusion head (62) passing through the interior of the sector plate (3) and extending outward, an elastic telescopic rod (64) being fixedly arranged inside the fixed sleeve (61), and a high-temperature ceramic pressure sensor (65) being arranged in contact with one end of the extrusion head (62) being fixedly arranged at the movable end of the elastic telescopic rod (64), and an overpressure frequency counting mechanism (15) being arranged inside the fixed sleeve (61).

3. A hot rolling coiler reel according to claim 2, characterized in that: The overpressure frequency counting mechanism (15) comprises a touch switch (151) fixedly arranged inside the fixed sleeve (61); a touch head of the touch switch (151) can be arranged in contact with the extrusion head (62); a pulse counter (152), a wireless communication module (153) and a storage battery (154) are fixedly arranged on the inner wall of the fixed sleeve (61); the touch switch (151) is electrically connected to the pulse counter (152); and the pulse counter (152), the wireless communication module (153) and the storage battery (154) are all electrically connected to the PLC controller (9).

4. The hot rolling coiler reel according to claim 1, characterized in that: The bottom of the trapezoidal groove (5) is an inclined surface, the bottom of the plunger body (4) matches the bottom of the trapezoidal groove (5), a limiting rod (16) is fixedly provided inside the trapezoidal groove (5), and the plunger body (4) is slidably connected to the limiting rod (16).

5. The hot rolling coiler reel according to claim 2, characterized in that: The top of the plunger body (4) and the inner side surface of the sector plate (3), as well as the fixing sleeve (61) and the inner side surface of the sector plate (3), are fixedly connected by bolts.

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