A mill with simultaneous drive at both ends

Abstract

This invention discloses a rolling mill with simultaneous transmission at both ends, belonging to the field of textile printing and dyeing technology. The transmission components include a transmission belt assembly or a chain assembly; each transmission assembly includes a transmission belt, a tension pulley, and a tension adjustment device; the transmission belt in each transmission assembly is simultaneously wound around a first pulley and a second pulley located on the same side; the tension pulley adjusts the tension of the transmission belt through the tension adjustment device. This invention eliminates shear damage caused by single-end transmission at its source, significantly extends the service life of the roller adhesive layer, and avoids wrinkling and deformation of the fabric due to speed difference. Furthermore, the reaction force of the transmission belt / chain, with the bearing as the fulcrum, applies opposing constraint forces to the middle of the two rollers through leverage, actively counteracting the roller deflection deformation, making the pressure more uniform across the entire width, and greatly improving the lateral consistency of the rolling liquid. While solving the problem of simultaneous and stable transmission at both ends, it achieves uniform rolling from left to right.

Description

Technical Field

[0001] This invention relates to the field of textile printing and dyeing technology, and in particular to a rolling mill with simultaneous transmission at both ends. Background Technology

[0002] In the textile printing and dyeing process, the padding machine is a core piece of equipment. It is mainly used to squeeze fabrics impregnated with dye liquor or auxiliaries to remove excess liquid, control the liquid retention rate of the fabric, and promote the uniform penetration of the liquid into the fiber interior. The performance of the padding machine, especially the uniformity and stability of its applied pressure, directly determines the product quality of subsequent dyeing, washing, or finishing processes.

[0003] In traditional rolling mills, a single-sided drive system with one driving roller and one driven roller is typically used between the two rollers pressing against each other. This method has several drawbacks: First, because the driving roller drags the driven roller to rotate through friction, the rubber coating on the roller surface is subjected to continuous shear stress, leading to easy aging, wear, and even peeling of the rubber layer, which seriously affects the service life of the roller. Second, the "rubbing" type of drive generates additional shear force on the fabric, which can easily cause defects such as wrinkles and deformation, affecting the quality of the finished product.

[0004] Most existing technologies employ gear drives. However, if gear drives are used only at one end of the rolls, the radial force generated by the gear meshing will cause the driven roll to experience a thrust away from the driving roll, resulting in inconsistent pressure or gap between the two rolls and uneven transverse flow of the rolled liquid. If gear drives are used at both ends, the requirements for gear machining precision and assembly synchronization are extremely high. Any tiny error can cause the gears at both ends to "collise," generating severe vibration and noise, or even damaging the equipment, making it impossible for the driven roll to operate smoothly.

[0005] Furthermore, to address the unavoidable flexural deformation of rollers under immense working pressure, Chinese patent document CN119332428A discloses a "heavy-duty uniform rolling device and washing / dyeing equipment," which adjusts the support force in the middle of the roller by setting an additional mandrel and multiple independent pressure devices. However, this solution has significant drawbacks in practical applications: because multiple independent sliding mechanisms need to be set at the same end of the same roller (such as configuring independent bearing seats and pressure devices for the roller body bearing and mandrel bearing respectively), these mechanisms are prone to mechanical jamming due to inconsistent deformation after being subjected to force, leading to adjustment failure and making the pressure distribution even more unstable. Simultaneously, in this solution, the fabric always covers the same roller during operation, and the dye liquor can only penetrate from the front to the back. For thick fabrics or when using suspension systems such as disperse dyes, the fabric itself acts as a "filter," causing a large number of dye particles to be filtered onto the fabric surface, resulting in severe color differences between the front and back sides. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a rolling mill with simultaneous transmission at both ends, aiming to solve the problems of unstable transmission, difficulty in flexural adjustment and color difference between the front and back sides in the prior art.

[0007] To achieve the above-mentioned objectives, the present invention proposes a rolling mill with simultaneous transmission at both ends, comprising a frame, a first roll assembly, at least one set of second roll assemblies, a power unit, and a transmission assembly. The first roll assembly includes a first roll and a first bearing housing. The first roll is rotatably connected to the frame via a first end shaft and a first bearing at both ends, and is also connected to the power unit via a transmission connection. Each second roll assembly includes a second roll, a second bearing housing, and a second pressure device. The second roll is connected to the second bearing housing via a second end shaft and a second bearing at both ends. The second pressure device is configured to apply pressure to the second bearing housing to drive the second roll to press against the first roll. The transmission assembly is a transmission belt assembly, which includes at least a transmission belt, a first pulley, a second pulley, a tensioning pulley, and a tension adjusting device. The transmission belt assembly is divided into left and right groups, which are respectively disposed at the left and right ends of the first roll and the second roll. The transmission belt is one of a single / double-sided synchronous belt, a single / double-sided V-belt, or a planar transmission belt. The first pulley is disposed at the end of the first roll and is disposed on the inner or outer side of the first bearing housing; the second pulley is disposed at the end of the second roll and is disposed on the outer or inner side of the second bearing housing. The tensioning wheel abuts against the outer or inner side of the transmission belt and adjusts the tension of the transmission belt through the tension adjusting device; the tensioning wheel includes a first tensioning wheel and a second tensioning wheel.

[0008] Two or more of the tensioning pulleys abut the outer side of one end of the drive belt against one of the pulleys, and the inner side of the other end is fitted onto another pulley; Under tension, part of the pressure applied by the second pressure device is transmitted to the transmission belt through the second end shaft, and then to the first pulley and the second pulley through the transmission belt, generating a pushing or pulling force on the first pulley and the second pulley, and then transmitted to the first end shaft and the second end shaft through the first pulley and the second pulley; these two forces are respectively fulcrumped by the first bearing and the second bearing, and are transmitted to the middle position of the first roll and the second roll body through leverage; The transmission component can also be a chain component, wherein the chain, the first sprocket, and the second sprocket in the chain component correspond to the transmission belt, the first pulley, and the second pulley in the transmission belt component, respectively.

[0009] Optionally, the transmission belt, the first pulley, and the second pulley are all disposed on the outer sides of the first bearing housing and the second bearing housing. The first tensioning wheel is connected to the second bearing housing and moves forward and backward with the second bearing housing and the second pulley. Alternatively, the first tensioning wheel is rotatably connected to the second end shaft via a swing arm. The first tensioning wheel and the second tensioning wheel are respectively disposed at the upper and lower positions of the second pulley. The outer side of one end of the transmission belt is tensioned and abutted against the outer side of the second pulley by the first tensioning wheel and the second tensioning wheel. Meanwhile, the inner side of the other end of the transmission belt is sleeved on the first pulley. The second tensioning wheel is connected to the frame. A tension adjusting device is connected between the second tensioning wheel and the frame. The tension adjusting device is configured to adjust the tension of the transmission belt. The tension adjusting device is a pneumatic, hydraulic, spring device, or screw adjusting device. Under the adjustment action of the tension adjusting device, the second tensioning wheel can move back and forth to adjust the tension of the transmission belt.

[0010] Optionally, the outer side of one end of the transmission belt is tensioned and abutted against the outer side of the first pulley by a set of tensioning pulleys. At the same time, the inner side of the other end of the transmission belt is sleeved on the second pulley. The other set of tensioning pulleys is connected to the second bearing seat. As the second bearing seat and the second pulley move forward and backward, the tension adjustment device and the tensioning pulleys are configured to adjust the tension and automatically adjust the position of the tensioning pulleys to accommodate the changes in the tension of the transmission belt caused by the change in the distance between the first pulley and the second pulley during the forward and backward movement. This ensures that the transmission belt will not fall off the pulley or that a "tooth-backing" phenomenon will occur during the pressing process, thus eliminating the need for tooth alignment during the pressing process.

[0011] Optionally, the tension adjustment device further includes a swing arm and an abutment, the abutment being a support roller or a support member, and the tension wheel and / or the abutment being connected to a spacing fine-tuning device; The first tensioning pulley is rotatably connected to the frame or the first bearing seat. The outer side of the transmission belt is tensioned and abuts against the first pulley by the first tensioning pulley. Meanwhile, the inner side of the other end of the transmission belt is sleeved on the second pulley. The swing arm is coaxially mounted on the first end shaft with the first pulley, and the second tension wheel is rotatably connected to the first end shaft through the swing arm; The abutting member is connected to the second bearing seat via a connector and moves forward and backward with the second bearing seat. Under normal operating conditions, the abutting member is positioned to abut against the swing arm. During the pressing and separating process of the first roll and the second roll, the contacting member rolls or slides with the side of the swing arm, causing the swing arm and the second tensioning wheel to rotate around the first end shaft within a certain angle range, thereby driving the transmission belt on the second tensioning wheel to move, so as to automatically adapt to the change in the center distance between the first roll and the second roll; During the pressing process, the abutting member drives the swing arm and the second tensioning wheel to rotate around the first end shaft and move away from the first tensioning wheel; during the separation process, the transmission belt drives the swing arm and the second tensioning wheel to rotate around the first end shaft and move closer to the first tensioning wheel. The spacing fine-tuning device connected to the first tensioning wheel, or the spacing fine-tuning device connected to the abutment, is used to manually or automatically adjust the tension of the transmission belt or the maximum rotation angle of the swing arm, so as to ensure that the transmission belt or chain maintains a certain tension when the first roll and the second roll are in the pressing state.

[0012] Optionally, one or more of the support roller, or the first tensioning wheel, the second tensioning wheel, the first pulley, the second pulley, or the first sprocket, the second sprocket are connected to a pressure sensor. The pressure sensor is electrically connected to a pressure display and / or control device. The control device of the pressure sensor electrically controls the spacing fine-tuning device to automatically control the tension of the transmission belt or chain.

[0013] In one example, a pressure sensor is provided between the connector connected to the support roller and the second bearing seat, with one set at each of the left and right ends. The pressure sensor is a piezoelectric sensor. The spacing fine-tuning device is connected to an adjusting motor, cylinder, or hydraulic cylinder, which drives the spacing fine-tuning device to move.

[0014] By monitoring the detection signal of the pressure sensor or the tension data of the tension adjustment device, as well as the total pressure F1 and F2 of the bearing seats on both sides (i.e. the pressure of the second pressure device on the left and right sides), the pressures FA and FB at the left and right ends of the roller body, and the pressures Fa and Fb at the two end shafts (the support rollers or pulleys at both ends) can be obtained. Under the pressing state, the force of F1 is divided into Fa and FA, and the force of F2 is divided into Fb and FB, i.e., F1-Fa=FA, F2-Fb=FB.

[0015] The pressure sensor monitors the pressure at both ends of the support rollers in real time. The PLC collects F1, FA, Fa, F2, FB, and Fb signals in real time, and the HMI displays the pressure value, deviation alarm, and other information in real time. By combining the lever principle and roller deflection model with the PLC, the magnitude of the torque generated by the pressure on the middle of the roller can be calculated, and closed-loop regulation control can be achieved through the PLC to realize the pressure balance between the left, middle, and right sides of the two rollers.

[0016] Optionally, it also includes a left-right position adjustment device, wherein the second pressure device is mounted on the frame or the second bearing seat via the left-right position adjustment device; There are two second bearings at the same end, and the two second bearings share one second bearing housing; The left and right position adjustment device is configured to drive the second pressure device to move in a direction parallel to the axis of the second roll, so as to change the force application position of the second pressure device relative to the second bearing seat, adjust the force distribution of the second pressure device on the two bearings in the same second bearing seat, change the lever arm length of the force applied by the transmission belt to the second pulley, and achieve the effect of adjusting the force on the middle of the second roll. The left and right position adjustment device is connected to a displacement display or control device, which includes at least one of an electronic ruler, a displacement sensor, a digital display, a mechanical position display device, or a lead screw adjustment device.

[0017] Optionally, the second roll includes a second roll body and a second mandrel passing through the second roll body. The two ends of the second mandrel extend out of the second roll body. The two ends of the second roll body are respectively supported by the second bearing. The second roll body is tightly fitted or fixedly connected to the inner wall of the middle part of the second mandrel. A gap is formed between the inner walls of the two ends of the second roll body and the outer walls of the two ends of the second mandrel. The second pulley is disposed at the end of the second spindle and is located outside the second bearing, and the inner side of the transmission belt is sleeved on the second pulley; The first pulley is located on the outside of the first bearing, and the outside of the transmission belt is tensioned and abutted against the first pulley by the tensioner.

[0018] Optionally, the second roll assembly consists of N groups arranged circumferentially along the first roll, where N is an integer greater than or equal to 2; a reverse dyeing liquid application device is provided between two adjacent second rolls, the reverse dyeing liquid application device including a turning roller and a spray pipe, the turning roller being disposed between the fabric and the first roll, for making the reverse side of the fabric face the spray pipe, and the outlet of the spray pipe facing the reverse side of the fabric.

[0019] Optionally, the second roll assembly consists of N groups, where N is an integer greater than or equal to 2; a liquid limiting roller is disposed above at least one of the second rolls, the liquid limiting roller is press-fitted with the second roll in a disengaging manner, and the liquid limiting roller, the second roll, and the first roll form a second liquid storage area.

[0020] Optionally, a retaining ring is provided at both ends of the first roll surface. The retaining ring is coaxially arranged with the first roll, and its outer radius is greater than the roll body radius of the first roll and less than the distance from the center of the retaining ring to the outer circle of the shaft end of the second roll. The roll surface of each second roll is located between the retaining rings at the left and right ends.

[0021] The beneficial effects of this invention are: 1. The rolling mill of the present invention, which drives at both ends simultaneously, adopts synchronous belt / chain drive at both ends of the rolls. The driving and driven rolls are driven at the same time, and the transmission is smooth and slip-free. It eliminates the shear damage caused by single-end friction transmission from the root, significantly extends the service life of the roll adhesive layer, and avoids the fabric from wrinkling and deformation due to speed difference.

[0022] 2. The rolling mill of the present invention, which drives simultaneously at both ends, can also adjust the tension of the transmission belt or chain through the tension adjustment device to adjust the pressure and reaction force of the transmission belt or chain on the first pulley or first sprocket and the second pulley or second sprocket. The greater the tension of the transmission belt or chain, the greater the pressure or tension of the transmission belt or chain on the first pulley or first sprocket and the second pulley or second sprocket, and vice versa. This adjusts the torque of the first end shaft and the second end shaft on the middle of the first roll and the second roll, thereby adjusting the left-center-right uniformity of the first roll and the second roll.

[0023] 3. The rolling mill of the present invention, which drives at both ends simultaneously, can flexibly adjust the force application position of the pressure device through the left and right position adjustment device, accurately distribute the bearing force, adapt to fabrics of different widths and thicknesses, and the rolling uniformity is adjustable and controllable, and can realize automated closed-loop control.

[0024] 4. The rolling mill of the present invention, which drives at both ends simultaneously, adopts a mandrel-roller composite structure for the rolls, with a rigid connection in the middle and a pre-reserved gap at both ends. The pressure is applied to the middle part of the rolls, avoiding the bending deformation caused by the pressure on the rolls and making the pressure distribution more stable.

[0025] 5. The rolling mill of the present invention, which drives at both ends simultaneously, is equipped with a reverse dyeing liquor application device, so that the dyeing liquor can directly act on the reverse side of the fabric and penetrate inward, solving the color difference between the front and back sides of thick fabrics and disperse dye systems, and significantly improving dyeing uniformity and appearance quality.

[0026] 6. The rolling mill of the present invention, which drives at both ends simultaneously, has retaining rings at both ends of the rolls to effectively prevent dye liquor from overflowing axially, reduce material waste, avoid contamination of bearings and transmission components, reduce equipment maintenance frequency, and improve the stability of continuous production.

[0027] 7. The rolling mill with simultaneous transmission at both ends of the present invention has a simple transmission system structure, is easy to assemble and debug, has lower requirements for processing accuracy than gear transmission at both ends, has lower manufacturing cost, stronger versatility, and can be compatible with multiple sets of rolls, liquid limiting, liquid storage and other process expansions.

[0028] In summary, this invention solves the problem of simultaneous and stable transmission at both ends while achieving uniform rolling from left to right, demonstrating significant ingenuity. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the rolling mill with simultaneous transmission at both ends according to the present invention; Figure 2 This is a top view schematic diagram of the rolling mill structure of the present invention, which has simultaneous transmission at both ends; Figure 3 This is a side view of the rolling mill structure of the present invention, which has simultaneous transmission at both ends. Figure 1 ; Figure 4 This is a side view of the rolling mill structure of the present invention, which has simultaneous transmission at both ends. Figure 2 ; Figure 5 This is a side view of the rolling mill structure of the present invention, which has simultaneous transmission at both ends. Figure 3 ; Figure 6 This is a side view of the rolling mill structure of the present invention, which has simultaneous transmission at both ends. Figure 4 ; Figure 7 This is a schematic diagram of the pressing and separating states of the rolling mill with simultaneous transmission at both ends according to the present invention. Figure 8 This is a schematic diagram showing the installation positions of the transmission belt, first pulley, and second pulley of the rolling mill that drives simultaneously from both ends according to the present invention.

[0030] Explanation of reference numerals in the attached figures: 1. Frame; 21. First roll; 22. First bearing housing; 31. Second roll; 32. Second bearing housing; 33. Second pressure device; 4. Power unit; 51. Transmission belt; 52. Tensioner; 53. Tension adjustment device; 531. Support roller; 532. Swing arm; 61. First pulley; 62. Second pulley; 7. Left and right position adjustment device; 111. Turning roller; 112. Spray pipe; 12. Liquid limiting roller; 13. Second liquid storage area; 14. Material retaining ring; 15. First bearing; 16. Second bearing; 17. First slider; 18. First slide rail; 19. Second slider; 20. Second slide rail; 81. First tensioner; 82. Second tensioner; 83. First end shaft.

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Example 1 refer to Figure 1 In this embodiment, a rolling mill with simultaneous transmission at both ends includes a frame 1, a first roll assembly, a set of second roll assemblies, a power unit 4, and a transmission assembly.

[0035] The first roll assembly includes a first roll 21 and a first bearing housing 22. The first roll 21 is a drive roll, and its two ends are rotatably supported on the frame 1 by first bearings 15. The first bearings 15 are self-aligning roller bearings. The first bearing housing 22 is a split cast steel housing, which is fixed to the frame 1 by bolts to ensure support rigidity. The power unit 4 is a geared motor, which is directly connected to one end of the first roll 21 through a coupling to drive the first roll 21 to rotate at a uniform speed.

[0036] Each second roll assembly includes a second roll 31, a second bearing housing 32, and a second pressure device 33. The second roll 31 is a driven roll, supported at both ends by second bearings 16 on the second bearing housing 32. The second bearings 16 are tapered roller bearings, capable of simultaneously withstanding radial and axial forces. The second pressure device 33 is a single-acting cylinder, with the cylinder body hinged to the frame 1 at the end. The piston rod end vertically abuts against the top center of the second bearing housing 32, with the pressure direction vertically downward, driving the second roll 31 to stably press against the first roll 21.

[0037] The transmission assembly is a belt assembly, divided into left and right groups, symmetrically arranged at the left and right ends of the first roll 21 and the second roll 31 to achieve synchronous transmission at both ends. Each transmission assembly includes a belt 51, a tension pulley 52, and a tension adjustment device 53. The belt 51 is a polyurethane toothed synchronous belt, wound around both the first pulley 61 and the second pulley 62 on the same side. The first pulley 61 is fixed to the end of the first roll 21 by a key connection and set screw, located inside the first bearing seat 22; the second pulley 62 is fixed to the end of the second roll 31 in the same manner, located outside the second bearing seat 32.

[0038] Each set of the transmission components includes at least two tensioning pulleys 52, with the outer side of the transmission belt 51 abutting against one of the transmission belts 51 and the inner side sleeved on the other transmission belt 51. The tension adjusting device 53 has a locked state, in which the transmission belt 51 is pressed by the tensioning wheel 52 and maintains a tensioned engagement with the first pulley 61 and the second pulley without relative slippage; The pressure applied by the second pressure device 33 is transmitted to the second pulley via the second bearing seat 32 and the second end shaft, and then to the first pulley 61 via the tensioned transmission belt 51, so that the first end shaft 83 bears a force toward the second roll 31, and the second end bearing bears a force toward the first roll 21. The force on the first end shaft 83 is fulcrumd with the first bearing 15, and the force on the second end shaft is fulcrumd with the second bearing 16, together forming a bending moment that brings the middle parts of the first roll 21 and the second roll 31 closer to each other.

[0039] The positions of the first roll 21 and the second roll 31 can be interchanged.

[0040] In one example, one side of the transmission belt 51 is fitted onto the second pulley, and the other side is abutted against the first pulley 61 via a tensioner. The second pulley, tensioner, and transmission belt 51 are considered as a whole. The transmission belt 51 can rotate along the second pulley and the tensioner. At this time, the second roll 31 is pressed against the first roll 21. Part of the pressure of the second pressure device 33 is transmitted to the first pulley 61 through the transmission belt 51, and then to the first end shaft 83 through the first pulley 61. The reaction force of the first pulley 61 is simultaneously transmitted to the second end shaft through the transmission belt 51. These two forces are respectively fulcrumped by the first bearing 15 and the second bearing 16, and are transmitted to the middle position of the first roll 21 and the second roll 31 through leverage. The middle parts of the first roll 21 and the second roll 31 are simultaneously subjected to forces toward each other, causing the middle parts of the first roll 21 and the second roll 31 to move closer to each other, which can counteract part of the deformation of the two rolls.

[0041] It should be noted that the designations of the first roll 21 and the second roll 31 are merely artificial numbering for ease of understanding and are interchangeable.

[0042] The tensioning pulley 52 is an idler pulley, with its surface abutting against the outer side of the transmission belt 51. It is hinged to the frame 1 via a swing arm 532. The tension adjustment device 53 consists of an adjusting screw, a compression spring, and a locking nut. One end of the screw is connected to the swing arm 532 of the tensioning pulley 52, and the other end passes through a threaded hole on the frame 1. By rotating the screw, the pushing force of the tensioning pulley 52 against the transmission belt 51 is changed, achieving continuous and adjustable tension. After adjustment, the position is fixed by the locking nut to prevent loosening during operation.

[0043] It is understood that there are at least two tensioning pulleys, or more, as long as the purpose of tensioning the transmission belt 51 is achieved.

[0044] refer to Figure 8The transmission belt 51, the first pulley 61, and the second pulley 62 are all disposed on the outer side of the first bearing seat 22 and the second bearing seat 32. The first tensioning pulley 81 is connected to the second bearing seat 32 and moves forward and backward with the second bearing seat 32 and the second pulley 62. Alternatively, the first tensioning pulley 81 is rotatably connected to the second end shaft via a swing arm 532. The first tensioning pulley 81 and the second tensioning pulley 82 are respectively disposed at the upper and lower positions of the second pulley 62. The outer side of one end of the transmission belt 51 is connected by the first tensioning pulley 81 and the second tensioning pulley 82. The tensioning pulley 82 is located on the outside of the second pulley 62, while the inner side of the other end of the transmission belt 51 is sleeved on the first pulley 61. The second tensioning pulley 82 is connected to the frame 1, and the tension adjusting device 53 is connected between the second tensioning pulley 82 and the frame 1. The tension adjusting device 53 is configured to adjust the tension of the transmission belt 51. The tension adjusting device 53 is a pneumatic, hydraulic, spring, or screw adjusting device. Under the adjustment of the tension adjusting device 53, the second tensioning pulley 82 can move back and forth to adjust the tension of the transmission belt 51.

[0045] The first roll 21 is the driving roll and is connected to the power unit 4 for transmission. The second roll 31 is the driven roll. The diameter of the second pulley 62 is set so that the theoretical linear speed of the second roll 31 is not lower than the theoretical linear speed of the first roll 21.

[0046] Furthermore, the first roll 21 includes a first roll body and a first mandrel passing through the first roll body. The two ends of the first mandrel extend out of the first roll body and are integrally formed with the first end shaft 83. The two ends of the first roll body are respectively supported by the first bearing 15. The first roll body is tightly fitted or fixedly connected to the inner wall of the middle part of the first mandrel. A gap is formed between the inner walls of the two ends of the first roll body and the outer walls of the two ends of the first mandrel. The first pulley 61 is disposed at the end of the first end shaft 83 and is located outside the first bearing 15, and the inner side of the transmission belt 51 is sleeved on the first pulley 61; In the pressing state, the pressure of the second pressure device 33 is transmitted through the roller surface of the second roller 31 to the roller surface of the first roller 21, and then to the first bearings 15 at both ends of the first roller body. Under the action of bending moment, the middle part of the first roller body is subjected to a force away from the second roller body.

[0047] Since the transmission belt 51 is in a taut state, the transmission belt 51 applies a tension force toward the second end shaft to the first end shaft 83. Since the first end shaft 83 is integrally formed with the first mandrel, this force is transmitted through the first mandrel to the middle of the first roller body connected to the first mandrel, so that the middle of the first roller body is subjected to a force toward the second roller body. This force is used to counteract the force away from the second roller body generated by the pressure of the second pressure device 33 on the first roller body.

[0048] Under the pressure of the second pressure device 33, the second roller body is pressed against the first roller body, and the first roller body generates a reaction force on the second roller body. Under the action of bending moment, the middle part of the second roller body receives a force away from the first roller body.

[0049] Since the transmission belt 51 is under tension, the transmission belt 51 applies a thrust away from the first end shaft 83 to the second end shaft. This thrust is transmitted to the middle of the second roller body with the second bearing 16 as the fulcrum, so that the middle of the second roller body is subjected to a force toward the first roller body. This force is used to counteract the reaction force of the first roller body on the second roller body.

[0050] By adjusting the tension of the transmission belt 51 using the tension adjustment device 53, the force on the middle part of the first roller and the second roller can be adjusted, achieving uniform pressing from left to right.

[0051] Meanwhile, since both ends of the first roll 21 and the second roll 31 are connected by the transmission belt 51, the synchronous operation of the first roll 21 and the second roll 31 is ensured. There is no mutual shearing force between the roll surfaces of the first roll 21 and the second roll 31, which extends the roll life and also avoids the substrate between the first roll 21 and the second roll 31 from being affected by the shearing force of the two rolls, thus ensuring product quality.

[0052] Explanation: When multiple second rolls 31 are provided, the diameter of the first roll 21 is usually larger, and its load-bearing capacity is correspondingly increased. Since the multiple second rolls 31 are arranged around the first roll 21, the influence of each second roll 31 on the first roll 21 cancels each other out, resulting in a relatively small amount of flexural deformation of the first roll 21. To facilitate disassembly of the transmission belt 51, the transmission belt 51 is positioned outside the first bearing seat 22 and the second bearing seat 32. The first pulley 61 is sleeved inside the transmission belt 51, and its outer side is tensioned and abutted against the second pulley by the tensioning wheel. Based on the lever principle, the reaction force of the transmission belt 51 forces the middle of the second roll 31 to move towards the middle of the first roll 21 with the second bearing as the fulcrum. Simultaneously, the transmission belt 51 generates tension on the first pulley 61. Through the lever action with the first bearing as the fulcrum, the middle of the first roll 21 is also forced to generate a force towards the second roll 31, collectively forming a bending moment that brings the middles of the two rolls closer together. The load-bearing capacity of the first roll 21 can be increased by increasing the wall thickness of the first roll 21 or increasing the diameter of the first roll 21, so as to reduce the impact on the first roll 21.

[0053] It is understandable that when multiple second rolls 31 are provided, the tension or thrust of the transmission belt 51 on the second rolls 31 is manifested as the resultant force generated on the multiple second rolls 31.

[0054] When the transmission belt is a V-belt or a flat belt, there is a possibility of slippage between the V-belt or flat belt and the first pulley and the second pulley. Alternatively, the first roll and the second roll may have insufficient machining accuracy or their diameter may become smaller due to wear. There may also be a slight difference in the linear speed between the first roll and the second roll.

[0055] To address this issue, in this embodiment, the diameter ratio of the first pulley 61 to the second pulley is set to 1.00-1.01, so that the theoretical linear speed of the second roll 31 is slightly higher than that of the first roll 21, and the speed difference is controlled within the range of 0.1%-1%. The linear speed between the first roll and the second roll can be adjusted by adjusting the tension of the V-belt or the flat belt, thus avoiding the influence caused by the difference in linear speed between the first roll and the second roll.

[0056] Furthermore, the tension of the transmission belt or chain can be adjusted by the tension adjustment device to regulate the pressure and reaction force of the transmission belt or chain on the first pulley or first sprocket and the second pulley or second sprocket. The greater the tension of the transmission belt or chain, the greater the pressure or tension of the transmission belt or chain on the first pulley or first sprocket and the second pulley or second sprocket, and vice versa. This adjusts the torque of the first end shaft and the second end shaft on the middle of the first roll and the second roll, thereby adjusting the left-center-right uniformity of the first roll and the second roll.

[0057] During the clutch engagement process, the transmission belt 51 and the chain are kept taut by the automatic adjustment of the tension adjusting device 53 to cope with the change in the distance between the first pulley 61 and the second pulley during the clutch engagement process. For example, the tension adjusting device 53 is a spring, a pneumatic or hydraulic device. Through the pressure or tension of the spring, pneumatic or hydraulic device, the transmission belt 51 is kept at a certain tension during the clutch engagement process to avoid tooth disengagement during the clutch engagement process, so that tooth alignment is not required during the pressing process.

[0058] In one example, the tension adjusting device 53 includes a manual adjusting mechanism. The tensioning wheel 52 is an idler wheel, with its surface abutting against the outer side of the transmission belt 51, and is hinged to the frame via a swing arm 532. The tension adjusting device 53 consists of an adjusting screw, a tension spring, and a locking nut. One end of the screw is connected to the swing arm 532 of the tensioning wheel 52, and the other end passes through a threaded hole on the frame 1. By rotating the screw, the pushing force of the tensioning wheel 52 against the transmission belt 51 is changed, achieving continuous and adjustable tension. After adjustment, the position is fixed by the locking nut to prevent loosening during operation.

[0059] During the clutch engagement process, the distance between the first pulley 61 and the second pulley increases, the tension spring is stretched, and the tension wheel 52 swings with the swing arm 532 to automatically adapt to the change in the path of the transmission belt 51 between the first pulley 61 and the second pulley.

[0060] During the pressing process, the distance between the first pulley 61 and the second pulley shortens, the tension spring returns to its free state (or near free state), and at the same time the tension wheel 52 swings in the opposite direction with the swing arm 532 to automatically adapt to the change in the path of the transmission belt 51 between the first pulley 61 and the second pulley.

[0061] In one example, the tension adjusting device 53 includes a hydraulic adjusting device, the tensioning wheel 52 is an idler wheel, the wheel surface abuts against the outer side of the transmission belt 51, the bottom end of the hydraulic cylinder is connected to the frame, and the tensioning wheel 52 is rotatably connected to the output end of the hydraulic cylinder. By adjusting the pressure of the hydraulic cylinder, the tension of the transmission belt 51 can be adjusted.

[0062] During the clutch engagement process, the distance between the first pulley 61 and the second pulley increases, and the tensioning pulley 52 extends with the hydraulic cylinder to automatically adapt to the change in the path of the transmission belt 51 between the first pulley 61 and the second pulley.

[0063] During the pressing process, the distance between the first pulley 61 and the second pulley becomes shorter, and the tensioning wheel 52 is compressed by the hydraulic cylinder to automatically adapt to the change in the path of the transmission belt 51 between the first pulley 61 and the second pulley.

[0064] Example 2 refer to Figure 2 This embodiment optimizes the transmission structure based on embodiment 1, while the rest of the structure is exactly the same as that in embodiment 1.

[0065] Each transmission assembly is provided with two tensioning pulleys 52. The two tensioning pulleys 52 are symmetrically arranged on both sides of the transmission belt 51 between the first pulley 61 and the second pulley 62 on the same side. They respectively press the inner and outer sides of the transmission belt 51 against the wheel surface of the corresponding pulley, increase the wrap angle, and prevent tooth skipping and slippage during high-speed operation.

[0066] Two tensioning pulleys 52 are fixedly connected to the side wall bolts of the second bearing seat 32 via L-shaped brackets. They move up and down synchronously with the second bearing seat 32, so that the center distance and relative position of the transmission belt 51 and the pulley remain constant during the pressing and separating of the second roll 31. This fundamentally avoids the "tooth-hitting" phenomenon common in gear or synchronous belt drives and ensures that the rolling and disengaging actions and the transmission do not interfere with each other.

[0067] Optionally, the transmission assembly can be replaced with a chain assembly. Accordingly, the first pulley 61 is replaced with a first sprocket, the second pulley 62 is replaced with a second sprocket, the transmission belt 51 is replaced with a precision roller chain, and the tensioner 52 is replaced with a chain tensioner 52, which is suitable for heavy-load, high-torque, low-speed rolling conditions.

[0068] Example 3 Figure 3 An embodiment of a rolling mill with a baffle ring 14 and a guide structure is shown, which is suitable for conventional fabric padding and washing processes.

[0069] Both ends of the first roll 21 are coaxially mounted with retaining rings 14. The retaining rings 14 are made of wear-resistant rubber and are fixed to the first roll 21 by clamping fixtures. The outer diameter of the retaining rings 14 is 20mm-40mm larger than the diameter of the first roll 21 and smaller than the distance from the center of the retaining ring 14 to the outer circle of the shaft end of the second roll 31, ensuring that the second roll 31 does not interfere with the retaining rings 14 when pressing. The roll surface of the second roll 31 is strictly positioned between the left and right retaining rings 14, preventing the dye liquor from overflowing axially along the roll surface during operation, thus avoiding material waste and contamination of bearings and transmission components.

[0070] Alternatively, a first liquid storage area can be formed between the roller surfaces of each of the second rollers 31, the roller surface of the first roller 21, and the retaining ring to hold the dye or auxiliaries. For example, when using reactive dyes to dye cotton fabrics, the dye tank contains the reactive dye, and the first liquid storage area can be piped to and contain the alkali agent, avoiding the hydrolysis of the reactive dye under alkaline conditions in the dye tank caused by the simultaneous holding of the reactive dye and alkali agent in the dye tank in traditional processes.

[0071] For example, when dyeing polyester fabrics with disperse dyes, the disperse dye is placed in the tank, and the hand-feeling agent can be transported and placed in the first storage area through a pipeline. This avoids the interference problem caused by the simultaneous placement of silver ion disperse dyes and cationic hand-feeling agents in the tank in the traditional process.

[0072] The bottom of the second bearing housing 32 is bolted to the second slider 19. A corresponding vertical second slide rail 20 is installed on the frame 1. The slider and slide rail use a precision linear guide pair with a clearance ≤0.02mm, providing precise guidance for the lifting and pressing of the second roll 31, ensuring that the second roll 31 is always parallel to the first roll 21, with a parallelism error ≤0.05mm / m. The guide pair is equipped with a grease lubrication channel; regular grease application ensures smooth operation.

[0073] During operation, the fabric is impregnated in the feed trough and then enters between the first roller 21 and the second roller 31. It passes smoothly under the synchronous transmission at both ends without unilateral friction or dragging, effectively protecting the flatness of the fabric surface and the rubber layer of the rollers.

[0074] Example 4 exist Figure 4 In the example, this embodiment adds a left and right position adjustment device 7 to achieve precise adjustment of the lateral distribution of rolling pressure, adapting to fabrics of different widths and weights.

[0075] The second pressure device 33 is mounted on the frame 1 via a left-right position adjustment device 7. The left-right position adjustment device 7 consists of a slide table, a linear guide rail, a ball screw, and a handwheel. The slide table and the linear guide rail are slidably connected. One end of the ball screw is connected to the handwheel, and the other end is threaded into the slide table. Rotating the handwheel can drive the second pressure device 33 to move left and right in a direction parallel to the axis of the second roll 31, adjusting the stroke by ±100mm. This changes the force distribution on the two second bearings 16 within the same second bearing seat 32, and alters the lever arm length of the force applied by the transmission belt 51 to the second pulley, thereby adjusting the force on the middle of the second roll 31 and making the lateral distribution of the rolling pressure adjustable.

[0076] The left and right position adjustment device 7 is connected to the displacement display device, which is a digital electronic ruler installed on one side of the linear guide rail. It detects and displays the displacement of the slide table in real time with a display accuracy of 0.01mm, which facilitates precise manual positioning.

[0077] Furthermore, the left and right position adjustment device 7 can replace the handwheel with a servo adjustment motor. Simultaneously, a transverse uniformity detection device is installed on the discharge side of the rolling mill, employing an infrared online humidity sensor array to detect the transverse liquid content uniformity of the fabric in real time. After the detection signal is processed by the PLC, it automatically controls the servo adjustment motor to drive the second pressure device 33 to move, achieving automated closed-loop adjustment of the pressure position and ensuring that the overall uniformity meets the standards.

[0078] Furthermore, the left and right position adjustment device 7 is connected to an adjustment motor and also includes a uniformity detection device for detecting the transverse uniformity of the rolled product. The uniformity detection device is controlled and connected to the adjustment motor, and controls the operation of the adjustment motor according to its detection signal to drive the second pressure device 33 to move.

[0079] In this embodiment, the tension adjustment device 53 can independently fine-tune the tension of the left and right transmission belts 51 so that the tension difference between the two ends is ≤5%, ensuring the synchronization of the transmission at both ends.

[0080] Example 5 Figure 5 , Figure 7 An embodiment with reverse dye application and storage functions is disclosed, which is suitable for high uniformity processes such as heavy fabrics and double-sided dyeing of disperse dyes.

[0081] In this embodiment, two sets of second roll 31 assemblies are arranged circumferentially along the first roll 21 to form a double roll pressing structure. A reverse dyeing liquor application device is provided between adjacent second rolls 31, including a flipping roll 111 and a spray pipe 112. The flipping roll 111 is arranged between the fabric and the first roll 21, supporting the fabric and detaching it from the first roll 21. The spray pipe 112 is horizontally arranged on the reverse side of the fabric, with a fan-shaped nozzle installed on the pipe. The spray angle is 60°-90°, and the distance between the nozzle and the fabric is 10mm-80mm, achieving uniform spraying and allowing the dye liquor to penetrate from the reverse side to the front side, solving the problems of surface accumulation and color difference between the front and back sides.

[0082] A liquid limiting roller 12 is provided above one of the second rollers 31. The liquid limiting roller 12 can be engaged and disengaged from the second roller 31 by a cylinder. A second baffle plate is also provided on the end face between the liquid limiting roller 12, the second roller 31 and the first roller 21. The liquid limiting roller 12, the second roller 31, the first roller 21 and the second baffle plate form a second liquid storage area 13. The volume of the liquid storage area is set to 1L-5L according to the width. It is equipped with a liquid level sensor and an automatic liquid supply valve to maintain a stable liquid level and accurately control the liquid carry-over rate of the fabric.

[0083] The tension adjustment device 53 also includes a swing arm 532 and an abutting member, the abutting member being a support roller 531 or a support member, and the tension wheel 52 or / and the abutting member being connected to a spacing fine-tuning device; The first tensioning wheel 81 is rotatably connected to the frame 1 or the first bearing seat 22. The outer side of the transmission belt 51 is tensioned and abutted against the first pulley 61 by the first tensioning wheel 81. At the same time, the inner side of the other end of the transmission belt 51 is sleeved on the second pulley 62. The swing arm 532 is coaxially mounted on the first end shaft 83 with the first pulley 61, and the second tension wheel 82 is rotatably connected to the first end shaft 83 through the swing arm 532. The abutting member is connected to the second bearing seat 32 via a connector and moves forward and backward with the second bearing seat 32. Under normal operating conditions, the abutting member is positioned to abut against the swing arm 532. During the pressing and separating process of the first roll 21 and the second roll 31, the contact member rolls or slides between the side of the swing arm 532, causing the swing arm 532 and the second tension wheel 82 to rotate around the first end shaft 83 within a certain angle range, thereby driving the transmission belt 51 on the second tension wheel 82 to move, so as to automatically adapt to the change in the center distance between the first roll 21 and the second roll 31; During the pressing process, the abutting member drives the swing arm 532 and the second tensioning wheel 82 to rotate around the first end shaft 83 and move away from the first tensioning wheel 81; during the separation process, the transmission belt 51 drives the swing arm 532 and the second tensioning wheel 82 to rotate around the first end shaft 83 and move closer to the first tensioning wheel 81. The spacing fine-tuning device connected to the first tensioning wheel 81, or the spacing fine-tuning device connected to the abutment, is used to manually or automatically adjust the tension of the transmission belt 51 or the maximum rotation angle of the swing arm 532, so as to ensure that the transmission belt 51 or chain maintains a certain tension when the first roller 21 and the second roller 31 are in the pressing state.

[0084] In practical applications, since the running trajectory of the tangent point between the contacting member and the swing arm 532 is a curve, it is difficult for the first roller 21 and the second roller 31 to completely match during the engagement and disengagement process. Therefore, the situation during the engagement and disengagement process is not limited. It is only necessary to ensure that the transmission belt 51 or chain maintains a certain tension under the pressing state.

[0085] One or more of the following components are connected to a pressure sensor: the support roller 531, the first tensioning wheel 81, the second tensioning wheel 82, the first pulley 61, the second pulley 62, or the first sprocket and the second sprocket. The pressure sensor is electrically connected to a pressure display and / or control device. The control device of the pressure sensor electrically controls the spacing fine-tuning device to automatically control the tension of the transmission belt 51 or the chain.

[0086] In one example, a pressure sensor is provided between the connector connected to the support roller 531 and the second bearing seat 32, with one set at each of the left and right ends. The pressure sensor is a piezoelectric sensor. The spacing fine-tuning device is connected to an adjusting motor, cylinder, or hydraulic cylinder, which drives the spacing fine-tuning device to move.

[0087] By monitoring the detection signal of the pressure sensor or the tension data of the tension adjustment device 53, as well as the total pressure F1 and F2 of the bearing seats on both sides (i.e. the pressure of the second pressure device 33 on the left and right sides), the pressures FA and FB at the left and right ends of the roller body, and the pressures Fa and Fb at the two end shafts (at the support rollers 531 or pulleys 61 and 62 at both ends) can be obtained. Under the pressing state, the force of F1 is divided into Fa and FA, and the force of F2 is divided into Fb and FB, i.e., F1-Fa=FA, F2-Fb=FB.

[0088] The pressure sensor monitors the pressure at both ends of the support rollers 531 in real time. The PLC collects F1, FA, Fa, F2, FB, and Fb signals in real time, and the HMI displays the pressure value, deviation alarm, and other information in real time. By combining the lever principle and roller deflection model with the PLC, the magnitude of the torque generated by the pressure on the middle of the roller can be calculated, and closed-loop regulation control can be achieved through the PLC to realize the pressure balance between the first roller 21 and the second roller 31 on the left, center, and right sides.

[0089] During the pressing process, the support roller 531 drives the swing arm 532 and the second tensioning wheel 82 to rotate around the first end shaft 83 and move away from the first tensioning wheel 81; during the separation process, the transmission belt 51 drives the swing arm 532 and the second tensioning wheel 82 to rotate around the first end shaft 83 and move closer to the first tensioning wheel 81.

[0090] The spacing fine-tuning device connected to the first tensioner 81 is used to manually adjust the tension of the transmission belt 51, and no further operation is required after the adjustment is completed.

[0091] The spacing fine-tuning device connected to the support roller 531 is used to manually adjust the maximum rotation angle of the swing arm 532 so as to keep the path length of the transmission belt 51 consistent when the first roller 21 and the second roller are pressed or separated. No further operation is required after the adjustment is completed. Explanation: During the process of pressing the first roll 21 and the second roll together and separating them, the path length of the transmission belt 51 will first shorten (shorter than the path length of the transmission belt 51 when the first roll 21 and the second roll are pressed together), and then lengthen (reaching or exceeding the path length of the transmission belt 51 when the first roll 21 and the second roll are pressed together). The position of the support roller 531 is manually adjusted by the spacing fine-tuning device, thereby adjusting the maximum rotation angle of the swing arm 532 to ensure that the path length of the transmission belt 51 is consistent between the separated state and the pressed state of the first roll 21 and the second roll (the path length of the transmission belt 51 in the separated state is equal to or slightly less than the path length of the transmission belt 51 in the pressed state), and to ensure that the transmission belt 51 is in a taut state in the pressed state.

[0092] Since the second tensioning wheel 82 rotates around the first end shaft 83 within a certain angle range, the transmission belt 51 always maintains constant tension during the pressing and separating process, and will not loosen or fall off from each transmission belt 51. There is no need to perform tooth alignment during the pressing process, which is convenient for actual operation.

[0093] Since the first roll 21 and the second roll 31 are relative concepts, the first roll 21 can also have the same structure as the second roll 31. Therefore, the first pulley 61 is located at the end of the first mandrel and outside the first bearing, and the transmission belt 51 is sleeved on the first pulley 61.

[0094] The second pulley is located outside the second bearing, and the transmission belt 51 is tensioned and abutted against the second pulley by the tensioner.

[0095] A first liquid storage area is formed between the roll surface of each of the second rolls 31, the roll surface of the first roll 21, and the retaining ring.

[0096] Example 6 exist Figure 6 In the example, this embodiment is a simplified heavy-duty implementation, which is compact, highly reliable, and suitable for high-density fabrics and high-pressure rolling scenarios.

[0097] The first mandrel of the first roll 21 is mounted on the frame 1 at both ends. The first roll body and the middle of the first mandrel are fixed by an interference fit and a locking ring. The gap at both ends can freely release the bending stress of the roll body and avoid jamming. The second mandrel of the second roll 31 is equipped with a second pulley 62. The transmission belt 51 is sleeved on the pulley, and the tension is directly transmitted to the mandrel, which enhances the correction capability of the middle of the roll body.

[0098] The second bearing seat 32 has the first slider 17 fixed to its back, and the first slide rail 18 is installed on the frame 1. The linear guide rail provides smooth lifting without jamming, with a maximum lifting stroke of 30mm-50mm. The second pressure device 33 uses a hydraulic cylinder with a working pressure of 0.5MPa-2.0MPa, providing stable heavy-duty pressure.

[0099] The transmission assembly adopts a toothed synchronous belt combination transmission: the first pulley 61 is a synchronous pulley, and the second pulley 62 is a smooth flat pulley. The toothed synchronous belt meshes with the synchronous pulley for transmission, and the other side frictionally drives the flat pulley, which balances transmission accuracy and buffering and shock absorption performance, and reduces operating noise.

[0100] This embodiment retains the core effects of the material retaining ring 14 to prevent overflow and the synchronous transmission at both ends to offset deformation, simplifies the automatic control structure, reduces manufacturing costs and debugging difficulty, and is suitable for continuous production in printing and dyeing plants.

[0101] In summary, during installation, first fix the first roll 21 and the first bearing seat 22 to ensure that the levelness is ≤0.05mm / m; then install the second roll 31 and adjust it to be parallel to the first roll 21 through the guide rail pair.

[0102] The tension of the left and right transmission belts 51 is adjusted to be consistent by the tension adjustment device 53, and the deviation of the value is measured by the tension gauge and is not more than 5%.

[0103] First, run the machine unloaded to confirm that there are no top teeth or interference; then gradually increase the pressure to the working pressure and observe the uniformity of liquid application across the entire fabric width. If necessary, fine-tune the force application position using the left and right position adjustment device 7.

[0104] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A rolling mill with simultaneous drive at both ends, comprising a frame, a first roll assembly, at least one set of second roll assemblies, a power unit, and a transmission assembly; The first roll assembly includes a first roll and a first bearing housing. The first roll is rotatably connected to the frame via a first end shaft and a first bearing at both ends, and is also connected to the power unit via a transmission connection. Each second roll assembly includes a second roll, a second bearing housing, and a second pressure device. The second roll is connected to the second bearing housing via a second end shaft and a second bearing at both ends. The second pressure device is configured to apply pressure to the second bearing housing to drive the second roll to press against the first roll. Its features are, The transmission assembly is a transmission belt assembly, which includes at least a transmission belt, a first pulley, a second pulley, a tensioning pulley, and a tension adjusting device. The transmission belt assembly is divided into left and right groups, which are respectively disposed at the left and right ends of the first roll and the second roll. The transmission belt is one of a single / double-sided synchronous belt, a single / double-sided V-belt, or a planar transmission belt. The first pulley is disposed at the end of the first roll and is disposed on the inner or outer side of the first bearing housing; the second pulley is disposed at the end of the second roll and is disposed on the outer or inner side of the second bearing housing. The tensioning pulley rests against the outer or inner side of the transmission belt and adjusts the tension of the transmission belt through the tension adjusting device; the tensioning pulley includes a first tensioning pulley and a second tensioning pulley; Two or more of the tensioning pulleys abut the outer side of one end of the drive belt against one of the pulleys, and the inner side of the other end is fitted onto another pulley; Under tension, a portion of the pressure applied by the second pressure device is transmitted to the transmission belt via the second end shaft, and then to the first and second pulleys via the transmission belt, generating a pushing or pulling force on the first and second pulleys. This force is then transmitted to the first and second end shafts via the first and second pulleys. These two forces are respectively fulcrumped by the first and second bearings, and are transmitted to the middle positions of the first and second roll bodies through leverage, or one of the forces acts directly on the middle position of the corresponding roll body via its corresponding end shaft. The transmission component can also be a chain component, wherein the chain, the first sprocket, and the second sprocket in the chain component correspond to the transmission belt, the first pulley, and the second pulley in the transmission belt component, respectively.

2. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, The transmission belt, the first pulley, and the second pulley are all disposed on the outer sides of the first bearing seat and the second bearing seat. The first tensioning wheel is connected to the second bearing seat and moves forward and backward with the second bearing seat and the second pulley. Alternatively, the first tensioning wheel is rotatably connected to the second end shaft via a swing arm. The first tensioning wheel and the second tensioning wheel are respectively disposed at the upper and lower positions of the second pulley. The outer side of one end of the transmission belt is tensioned and abutted against the outer side of the second pulley by the first tensioning wheel and the second tensioning wheel. At the same time, the inner side of the other end of the transmission belt is sleeved on the first pulley. The second tensioning wheel is connected to the frame. A tension adjusting device is connected between the second tensioning wheel and the frame. The tension adjusting device is configured to adjust the tension of the transmission belt. The tension adjusting device is a pneumatic, hydraulic, spring device or a screw adjusting device. Under the adjustment action of the tension adjusting device, the second tensioning wheel can move back and forth to adjust the tension of the transmission belt.

3. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, One end of the transmission belt is tensioned and abutted against the outside of the first pulley by a set of tensioning pulleys. At the same time, the inner side of the other end of the transmission belt is sleeved on the second pulley. Another set of tensioning pulleys is connected to the second bearing seat. As the second bearing seat and the second pulley move forward and backward, the tension adjustment device and the tensioning pulleys are configured to adjust the tension and automatically adjust the position of the tensioning pulleys to accommodate the changes in the tension of the transmission belt caused by the change in the distance between the first pulley and the second pulley during the forward and backward movement. This ensures that the transmission belt will not fall off the pulleys or that a "tooth-backing" phenomenon will occur during the pressing process, thus eliminating the need for tooth alignment during the pressing process.

4. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, The tension adjustment device further includes a swing arm and an abutment, the abutment being a support roller or a support member, and the tension wheel and / or the abutment being connected to a spacing fine-tuning device; The first tensioning pulley is rotatably connected to the frame or the first bearing seat. The outer side of the transmission belt is tensioned and abuts against the first pulley by the first tensioning pulley. Meanwhile, the inner side of the other end of the transmission belt is sleeved on the second pulley. The swing arm is coaxially mounted on the first end shaft with the first pulley, and the second tension wheel is rotatably connected to the first end shaft through the swing arm; The abutting member is connected to the second bearing seat via a connector and moves forward and backward with the second bearing seat. Under normal operating conditions, the abutting member is positioned to abut against the swing arm. During the pressing and separating process of the first roll and the second roll, the contacting member rolls or slides with the side of the swing arm, causing the swing arm and the second tensioning wheel to rotate around the first end shaft within a certain angle range, thereby driving the transmission belt on the second tensioning wheel to move, so as to automatically adapt to the change in the center distance between the first roll and the second roll; During the pressing process, the abutting member drives the swing arm and the second tensioning wheel to rotate around the first end shaft and move away from the first tensioning wheel; During the separation process, the transmission belt drives the swing arm and the second tensioning wheel to rotate around the first end shaft and move closer to the first tensioning wheel; The spacing fine-tuning device connected to the first tensioning wheel, or the spacing fine-tuning device connected to the abutment, is used to manually or automatically adjust the tension of the transmission belt or the maximum rotation angle of the swing arm, so as to ensure that the transmission belt or chain maintains a certain tension when the first roll and the second roll are in the pressing state.

5. The rolling mill with simultaneous drive at both ends according to claim 2, 3, or 4, characterized in that, The support roller, or one or more of the first tensioning roller, the second tensioning roller, the first pulley, the second pulley, or the first sprocket, the second sprocket are connected to a pressure sensor. The pressure sensor is electrically connected to a pressure display and / or control device. The control device of the pressure sensor electrically controls the spacing fine-tuning device to automatically control the tension of the transmission belt or chain.

6. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, It also includes a left-right position adjustment device, and the second pressure device is mounted on the frame or the second bearing seat through the left-right position adjustment device; There are two second bearings at the same end, and the two second bearings share one second bearing housing; The left and right position adjustment device is configured to drive the second pressure device to move in a direction parallel to the axis of the second roll, so as to change the force application position of the second pressure device relative to the second bearing seat, adjust the force distribution of the second pressure device on the two bearings in the same second bearing seat, change the lever arm length of the force applied by the transmission belt to the second pulley, and achieve the effect of adjusting the force on the middle of the second roll. The left and right position adjustment device is connected to a displacement display or control device, which includes at least one of an electronic ruler, a displacement sensor, a digital display, a mechanical position display device, or a lead screw adjustment device.

7. The rolling mill with simultaneous transmission at both ends according to claim 4, characterized in that, The second roll includes a second roll body and a second mandrel passing through the second roll body. The two ends of the second mandrel extend out of the second roll body. The two ends of the second roll body are respectively supported by the second bearing. The second roll body is tightly fitted or fixedly connected to the inner wall of the middle part of the second mandrel. A gap is formed between the inner walls of the two ends of the second roll body and the outer walls of the two ends of the second mandrel. The second pulley is disposed at the end of the second spindle and is located outside the second bearing, and the inner side of the transmission belt is sleeved on the second pulley; The first pulley is located on the outside of the first bearing, and the outside of the transmission belt is tensioned and abutted against the first pulley by the tensioner.

8. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, The second roll assembly consists of N groups arranged circumferentially along the first roll, where N is an integer greater than or equal to 2; a reverse dyeing liquid application device is provided between two adjacent second rolls, the reverse dyeing liquid application device including a turning roller and a spray pipe, the turning roller being disposed between the fabric and the first roll, for making the reverse side of the fabric face the spray pipe, and the outlet of the spray pipe facing the reverse side of the fabric.

9. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, The second roll assembly consists of N groups, where N is an integer greater than or equal to 2; a liquid limiting roller is disposed above at least one of the second rolls, and the liquid limiting roller is press-fitted with the second roll in a disengaging manner, and the liquid limiting roller, the second roll, and the first roll form a second liquid storage area.

10. The rolling mill with simultaneous transmission at both ends according to claim 1, characterized in that, The first roll surface is provided with retaining rings at both ends. The retaining rings are coaxially arranged with the first roll. The outer radius of the retaining ring is greater than the roll body radius of the first roll and less than the distance from the center of the retaining ring to the outer circle of the shaft end of the second roll. The roll surface of each second roll is located between the retaining rings at the left and right ends.

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