Ultra-wide polyester filament non-woven geotextile continuous production device

Abstract

The application relates to the technical field of geotextile production equipment, in particular to a continuous production device for super-wide polyester filament non-woven geotextile, which comprises a spun-bonded web forming unit, a needling reinforcement unit, a heat setting unit and a finished product winding unit which are sequentially connected along the material conveying direction; the finished product winding unit comprises two groups of side frames which are symmetrically arranged, and an expansion roller for winding the geotextile is arranged between the two groups of side frames; a rigid supporting roller is arranged on one side of the expansion roller below and close to the cloth feeding direction, and an elastic supporting roller is arranged on one side of the expansion roller below and close to the cloth discharging direction; a vertically arranged sliding track is fixedly arranged on each group of side frames, and a pneumatic clamping piece is slidingly assembled on the sliding track; a variable speed driving structure which is in transmission cooperation with the pneumatic clamping piece is arranged below the pneumatic clamping piece. With the increase of the diameter of the coiled material, the pneumatic clamping piece is lifted to change the effective radius of the friction transmission, the winding line speed of the geotextile is maintained to be approximately constant, and the fluctuation of the line speed caused by the increase of the diameter of the coiled material is reduced.

Description

Technical Field

[0001] This invention relates to the field of geotextile production equipment technology, specifically to a continuous production device for ultra-wide polyester filament nonwoven geotextile. Background Technology

[0002] Polyester filament nonwoven geotextiles, with their excellent tensile strength, impermeability, and aging resistance, are widely used in roadbed reinforcement, dam seepage prevention, municipal environmental protection, and water conservancy projects. Among these, ultra-wide polyester filament nonwoven geotextiles effectively reduce splicing gaps on-site, improving overall seepage prevention and protection effects, and represent the mainstream development direction in geotechnical engineering applications. Existing continuous production lines for polyester filament nonwoven geotextiles generally include four core processes: spunbonding, needle punching reinforcement, heat setting, and finished product winding. After forming, reinforcement, and heat setting, the fabric is continuously wound into shape by winding equipment. The stability and continuity of the winding process directly determine the appearance quality and mechanical property consistency of the finished geotextile.

[0003] Currently, almost all nonwoven fabric and geotextile winding equipment in the industry relies on electronic speed control systems for speed adjustment. This involves using tension sensors, encoders, and PLC controllers in conjunction with variable frequency motors to collect real-time signals of roll tension and roll diameter, and then adjusting the motor speed through program calculations to attempt to achieve constant linear speed and constant tension winding. While this type of electronic speed control structure can meet the winding needs of small-width fabrics in conventional dry and clean environments, it has inherent structural defects and extremely poor adaptability for the production scenarios of ultra-wide width, high-grammage polyester filament nonwoven geotextiles.

[0004] For example, patent CN116553270A discloses a high-speed winding device for anti-breakage nonwoven fabric. Its core speed regulation logic is electronically controlled tension closed-loop regulation, relying on multiple sets of sensing elements to provide real-time feedback of tension data, and cooperating with a frequency conversion speed regulation system to correct the winding speed. However, geotextile production workshops have a large amount of floating fiber dust, and sensor probes and signal contacts are prone to dust accumulation and blockage, resulting in distorted tension signal acquisition and delayed feedback. This leads to frequent problems such as disordered winding speed regulation and fluctuating tension, causing wrinkling, stretching deformation, and uneven tension in ultra-wide geotextile fabrics, which cannot meet the production requirements of high-standard engineering geotextiles. At the same time, the electronically controlled speed regulation system has a large number of components and complex circuitry, resulting in a high failure rate and high maintenance costs when working in a dusty environment for a long time, and poor stability in continuous production.

[0005] For example, patent CN216917907U discloses an easily adjustable nonwoven fabric winding device, which also adopts the traditional electronically controlled frequency conversion speed regulation mode, relying on manually preset program parameters to match different winding speeds. This method can only achieve staged speed regulation with fixed parameters and cannot adaptively and dynamically adjust according to real-time changes in the roll diameter. In the later stages of ultra-wide and large-diameter roll winding, the linear speed continuously increases and the tension increases sharply, which can easily lead to problems such as over-tightening of the roll, edge breakage, and fabric breakage causing machine shutdown. At the same time, the equipment adopts a double rigid support roller structure. When used with an electronically controlled speed regulation system, it can only achieve basic winding functions. After winding, it cannot unload the material automatically and requires manual assistance. The degree of automation is low and it cannot adapt to the continuous production rhythm of the assembly line.

[0006] For example, patent CN118877616A discloses a composite geomembrane winding device and method, which not only uses electronic speed control, but also relies entirely on electronic timing logic control for the linkage processes such as cutting and loosening rollers. In harsh working conditions with high dust levels in geotextile production, electrical switches and controllers are prone to failure, which can lead to inaccurate winding speed adjustment, uncontrolled tension, and disordered process sequence, resulting in loose rolls, frayed edges, and tearing of the fabric.

[0007] In summary, existing mainstream geotextile winding equipment relies on electronic speed control schemes for speed regulation, which generally suffers from core defects such as poor adaptability to dusty environments, signal acquisition distortion, lag in speed regulation response, unstable tension control, and high electrical failure rates. Furthermore, the supporting rigid support structure and electronic control timing structure are unsuitable for the automatic unloading and anti-loosening production requirements of ultra-wide geotextiles. Therefore, it is necessary to develop a continuous production device for ultra-wide polyester filament nonwoven geotextiles to adapt to harsh dusty conditions and achieve stable winding and automated, smooth unloading. Summary of the Invention

[0008] To address the problems in the existing technology, the present invention provides a continuous production device for ultra-wide polyester filament nonwoven geotextiles, which is adapted to harsh dust conditions and achieves stable winding and automated and smooth unloading.

[0009] The technical solution adopted by the present invention to solve its technical problem is a continuous production device for ultra-wide polyester filament nonwoven geotextile, which includes a spunbonding web forming unit, a needle punching reinforcement unit, a heat setting unit and a finished product winding unit connected in sequence along the material conveying direction. The finished product winding unit includes two symmetrically arranged sets of side frames, with an expansion roller for winding geotextile between the two sets of side frames. A rigid support roller is located below the expansion roller on the side closer to the fabric feeding direction, and an elastic support roller is located below the expansion roller on the side closer to the fabric discharge direction. The ends of the rigid and elastic support rollers are rotatably connected to their respective side frames. Each set of side frames is fixedly equipped with a vertically arranged sliding rail, on which a pneumatic clamping component is slidably mounted. The pneumatic clamping component is used to engage and limit the end of the expansion roller. Below the pneumatic clamping component is a variable speed drive structure that drives the pneumatic clamping component. This variable speed drive structure adaptively adjusts the rotational speed of the expansion roller according to the lifting height of the pneumatic clamping component. A pneumatic cutting assembly for cutting the geotextile is installed on the side of the expansion roller in the feeding direction.

[0010] Preferably, the pneumatic cutting assembly includes a movable blade, a cutting bracket connected between two sets of side frames above the movable blade, a number of pneumatic telescopic cylinders installed on the cutting bracket, the piston rod end of the pneumatic telescopic cylinders being fixedly connected to the upper end of the movable blade, and a cutting worktable connected between the two sets of side frames below the cutting bracket.

[0011] Preferably, the pneumatic clamping component includes a sliding base, a slider that slides with a sliding track connected to the side of the sliding base, a telescopic cylinder installed at the end of the sliding base away from the expansion roller, a spline sleeve rotatably connected inside the sliding base, a spline shaft slidably connected inside the spline sleeve, a snap-fit ​​connector fixedly connected at the end of the spline shaft near the expansion roller, the snap-fit ​​connector having a chamfered end face, snap-fit ​​grooves that mate with the snap-fit ​​connector being opened at both ends of the expansion roller shaft, the piston rod end of the telescopic cylinder being connected to the spline shaft through a rotating component; and a worm gear that drives the transmission structure is fixedly connected to the outside of the spline sleeve.

[0012] Preferably, a material dropping guide rail is provided on the side of the expansion roller away from the pneumatic cutting assembly. The material dropping guide rail includes two sets of symmetrically arranged guide plates. Each set of guide plates has a guide groove on its opposite surface for guiding the expansion roller. A horizontally arranged support rod is connected to the bottom of the guide plate. The bottom of the guide plate and the support rod are connected to a support frame.

[0013] Preferably, the upper inner side of the guide groove is provided with an anti-slip layer structure, and the lower inner side of the guide groove is designed to be smooth. When the expansion roller slides down along the material drop guide track, the end faces of the two ends of the expansion roller continuously rub against the anti-slip layer structure, and the expansion roller rotates by relying on the friction force, so that the outer geotextile roll is continuously wrapped and tightened.

[0014] Preferably, the anti-slip layer structure includes a hollow rubber strip, which is bonded to the upper inner side of the guide groove; the hollow rubber strip is filled with hydraulic oil, a damping regulating valve is installed on the side of the guide plate, and both ends of the hollow rubber strip are connected to the damping regulating valve.

[0015] Preferably, the variable speed drive structure includes a drive motor and a friction transmission disk connected to the output shaft of the drive motor. A friction wheel is provided below the axis of the friction transmission disk to drive the friction transmission disk. The friction wheel is coaxially connected to the transmission shaft. The upper end of the transmission shaft passes through the sliding base and is rotatably connected to the sliding base. A worm gear that meshes with the worm wheel is fixedly installed at the top of the transmission shaft. When the pneumatic clamping member rises, it causes the friction wheel to shift radially relative to the friction disk, reducing the transmission radius between the friction wheel and the friction transmission disk. A motor bracket is installed at the bottom of the drive motor. A truss is connected between the bottoms of the two sets of side frames. The truss is fixedly connected to the motor bracket.

[0016] Preferably, the top of the sliding track is provided with an energy storage and pressure supply component. The energy storage and pressure supply component is compressed and stored as the pneumatic clamping component moves upward. The energy storage and pressure supply component is connected to the pneumatic cutting assembly through the main delayed pressure relief valve. The pneumatic cutting assembly is connected to the telescopic cylinder through the secondary delayed pressure relief valve. After the clamping component rises to the limit height of the track, the air pressure is supplied through the main delayed pressure relief valve to first drive the pneumatic cutting assembly to cut the fabric. After the pneumatic cutting assembly cuts the fabric, the air pressure is then used through the secondary delayed pressure relief valve to drive the telescopic cylinder to release the clamping joint and release the expansion roller.

[0017] Preferably, the sliding base is provided with a support frame on the side near the expansion roller, and one end of the damping telescopic rod is connected to the side of the support frame near the pneumatic cutting assembly. The damping telescopic rod is connected to the side of the sliding base through an elastic hinge shaft. The support frame is provided with a groove for supporting the expansion roller shaft. After the support frame receives the falling expansion roller, the support frame swings towards the material drop guide rail and stretches the damping telescopic rod so that the lower end of the support frame aligns with the material drop guide rail.

[0018] The beneficial effects of this invention are: The present invention discloses a continuous production device for ultra-wide polyester filament nonwoven geotextiles. As the roll diameter increases, the pneumatic clamping component is raised to change the effective radius of friction transmission. It eliminates the need for tension sensors and frequency conversion control systems, and relies on mechanical structures to maintain an approximately constant geotextile winding speed. This reduces the linear speed fluctuation caused by the increase in roll diameter, automatically adapts to geotextiles of different thicknesses, and is suitable for nonwoven fabric production environments with high dust levels, thereby reducing equipment failure rates.

[0019] This invention features an energy storage and pressure supply component in conjunction with a two-stage delayed pressure relief valve. By utilizing the upward stroke of the clamping component corresponding to the roll diameter, air pressure is accumulated, automatically achieving a sequential linkage between cutting the fabric first and releasing the expansion roller, thus avoiding fabric pulling and roll loosening, and ensuring high synchronization of actions.

[0020] During the unloading process of this invention, the expansion roller falls onto the support frame, and the support frame swings to transport the expansion roller to the unloading guide track; the anti-slip structure on the upper part of the track rubs against the end face of the expansion roller, driving the expansion roller to rotate, thereby further tightening the roll material during the unloading stage and effectively preventing the geotextile from loosening and the edges from fraying. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is an isometric view of the present invention; Figure 2 This is an isometric view of the finished winding unit of the present invention; Figure 3 for Figure 2 Another perspective isometric drawing; Figure 4 This is an isometric view of the pneumatic clamping component of the present invention; Figure 5 This is a side view of the sliding base of the present invention; Figure 6 This is a side view of the sliding base after the support frame of the present invention has swung. Figure 7 This is a cross-sectional structural diagram of the sliding base of the present invention; Figure 8 This is a schematic diagram of the expansion roller end structure of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the variable speed drive structure of the present invention; Figure 10 This is a side view of the material unloading guide rail of the present invention. In the diagram: 1. Spunbond web forming unit; 2. Needle-punching reinforcement unit; 3. Heat setting unit; 4. Finished product winding unit; 5. Side frame; 6. Expansion roller; 7. Rigid support roller; 8. Elastic support roller; 9. Sliding track; 10. Pneumatic clamping component; 11. Sliding base; 12. Slider; 13. Telescopic cylinder; 14. Spline sleeve; 15. Spline shaft; 16. Snap-fit ​​connector; 17. Guide chamfer; 18. Snap-fit ​​groove; 19. Rotating component; 20. Worm gear; 21. Worm; 22. Variable speed drive structure; 23. Drive motor; 4. Friction drive disc; 25. Friction wheel; 26. Drive shaft; 27. Motor bracket; 28. Truss; 29. ​​Pneumatic cutting assembly; 30. Cutting bracket; 31. Pneumatic telescopic cylinder; 32. Movable blade; 33. Cutting worktable; 34. Energy storage and pressure supply component; 35. Support frame; 36. Track; 37. Damping telescopic rod; 38. Flexible hinge shaft; 39. Material drop guide rail; 40. Guide plate; 41. Guide groove; 42. Support rod; 43. Support frame; 44. Anti-slip layer structural component; 45. Damping regulating valve. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] As one embodiment of the present invention, such as Figures 1 to 3 As shown, the continuous production device for ultra-wide polyester filament nonwoven geotextile of the present invention includes a spunbond web forming unit 1, a needle punching reinforcement unit 2, a heat setting unit 3, and a finished product winding unit 4 connected in sequence along the material conveying direction. The finished product winding unit 4 includes two sets of symmetrically arranged side frames 5, with an expansion roller 6 for winding geotextile between the two sets of side frames 5; a rigid support roller 7 is provided below the expansion roller 6 on the side near the fabric feeding direction, and an elastic support roller 8 is provided below the expansion roller 6 on the side near the fabric discharge direction. The two ends of the rigid support roller 7 and the elastic support roller 8 are respectively rotatably connected to the corresponding side frame 5; a vertically arranged sliding rail 9 is fixed on each set of side frames 5, and a pneumatic clamping component 10 is slidably mounted on the sliding rail 9. The pneumatic clamping component 10 is used to clamp and limit the end of the expansion roller 6; a variable speed drive structure 22 is provided below the pneumatic clamping component 10 and is used to adaptively adjust the rotation speed of the expansion roller 6 according to the lifting height of the pneumatic clamping component 10; a pneumatic cutting component 29 for cutting geotextile is installed on the side of the expansion roller 6 in the feeding direction.

[0025] In use, polyester raw materials are sequentially passed through spunbonding unit 1 to form a long filament fiber web blank. The fiber web blank is then sent to needle punching and reinforcing unit 2 for needle punching and entanglement to form a non-woven geotextile. The geotextile is then conveyed to heat setting unit 3 to complete the heat setting process. The set continuous geotextile is then conveyed to finished product winding unit 4 for winding.

[0026] In the initial state of the finished winding unit 4, the expansion roller 6 is supported by the rigid support roller 7 and the elastic support roller 8. The end of the geotextile is pulled to the surface of the expansion roller 6, and the pneumatic clamping member 10 moves along the sliding track 9 and engages with and limits the two ends of the expansion roller 6. The variable speed drive structure 22 drives the expansion roller 6 to rotate, continuously winding the geotextile onto the expansion roller 6. As the geotextile is continuously wound, the outer diameter of the roll continues to increase, and the center height of the expansion roller 6 gradually rises, driving the pneumatic clamping members 10 on both sides to slide upward along the vertical sliding track 9. At this time, the rigid support roller 7 and the sliding track 9 work together to stably support the expansion roller 6 after winding the geotextile, and the elastic support roller 8 provides auxiliary support. The variable speed drive structure 22 drives the pneumatic clamping member 10 and adaptively adjusts the rotation speed of the expansion roller 6 according to the height change to compensate for the linear speed change caused by the increase in the roll diameter and maintain the stability of the geotextile winding linear speed. Once the geotextile roll reaches the preset specifications, the pneumatic cutting component 29 on the feeding side is activated to cut the continuously moving geotextile, completing the single roll geotextile winding operation.

[0027] When the roll material is wound, the pneumatic clamp 10 unlocks the expansion roller 6; the expansion roller 6 and the geotextile roll material together press down on the elastic support roller 8 on the discharge side, the elastic support roller 8 undergoes radial deformation under pressure, and the expansion roller 6 loses its rigid support constraint in the discharge direction; the expansion roller 6 tilts and rolls down to the discharge side under its own weight, completing the unloading transition.

[0028] To ensure the cutting stability of the pneumatic cutting assembly 29, as one embodiment of the present invention, such as Figure 2 , Figure 3 As shown, the pneumatic cutting assembly 29 includes a movable blade 32. Above the movable blade 32 is a cutting bracket 30 connected between two sets of side frames 5. Several sets of pneumatic telescopic cylinders 31 are installed on the cutting bracket 30. The piston rod end of the pneumatic telescopic cylinder 31 is fixedly connected to the upper end of the movable blade 32. Below the cutting bracket 30 is a cutting worktable 33 connected between the two sets of side frames 5.

[0029] In use, the geotextile is continuously conveyed from above the cutting workbench 33. When the roll material in the finished winding unit 4 reaches the predetermined roll diameter, the pneumatic telescopic cylinder 31 on the cutting bracket 30 receives the driving air source signal, and the piston rod extends downward, driving the movable blade 32 to move down synchronously. The movable blade 32 cooperates with the cutting workbench 33 below to cut the geotextile. After the cutting is completed, the piston rod of the pneumatic telescopic cylinder 31 retracts, driving the movable blade 32 to return to its original position, preparing for the next cutting operation.

[0030] To ensure the usability of the pneumatic clamping member 10, as one embodiment of the present invention, such as Figures 2 to 8 As shown, the pneumatic clamping component 10 includes a sliding base 11. A slider 12 that slides and engages with the sliding track 9 is connected to the side of the sliding base 11. A telescopic cylinder 13 is installed at the end of the sliding base 11 away from the expansion roller 6. A spline sleeve 14 is rotatably connected inside the sliding base 11. A spline shaft 15 is slidably connected inside the spline sleeve 14. A snap-fit ​​connector 16 is fixedly connected at the end of the spline shaft 15 near the expansion roller 6. A guide chamfer 17 structure is provided on the end face of the snap-fit ​​connector 16. Both ends of the roller shaft of the expansion roller 6 are provided with snap-fit ​​grooves 18 that engage with the snap-fit ​​connector 16. The piston rod end of the telescopic cylinder 13 is connected to the spline shaft 15 through a rotating component 19. A worm gear 20 that drives the transmission of the speed change drive structure 22 is fixedly connected to the outside of the spline sleeve 14.

[0031] In use, the sliding base 11 slides freely in the vertical direction along the sliding track 9 by relying on the slider 12, thereby automatically lifting up as the expansion roller 6 winds up and thickens. During the roller loading operation, the telescopic cylinder 13 pushes the spline shaft 15 to slide axially along the inside of the spline sleeve 14 through the rotating part 19, so that the snap joint 16 at the end of the spline shaft 15 is embedded into the snap groove 18 at the end of the expansion roller 6 shaft, completing the axial limiting and circumferential engagement at both ends of the expansion roller 6. The rotating part 19 ensures that the spline shaft 15 can move axially with the telescopic cylinder 13 and can rotate independently.

[0032] When the equipment is running, the output torque of the variable speed drive structure 22 acts on the worm gear 20. The worm gear 20 is fixed to the spline sleeve 14 as a whole, driving the spline sleeve 14 to rotate. The spline sleeve 14 is slidably engaged with the spline shaft 15. The torque is transmitted to the expansion roller 6 through the spline sleeve 14, the spline shaft 15, and the snap joint 16, driving the expansion roller 6 to rotate and complete the geotextile winding.

[0033] Before unloading after winding is completed, the telescopic cylinder 13 pulls the spline shaft 15 backward, the snap joint 16 disengages from the snap groove 18 at the end of the expansion roller 6, releases the clamping constraint on the expansion roller 6, and realizes the release of the expansion roller 6.

[0034] To facilitate material feeding from the expansion roller 6, as one embodiment of the present invention, such as... Figures 2 to 10 As shown, the expansion roller 6 is provided with a material dropping guide rail 39 on the side away from the pneumatic cutting assembly 29. The material dropping guide rail 39 includes two sets of symmetrically arranged guide plates 40. The two sets of guide plates 40 are provided with guide grooves 41 for guiding the expansion roller 6 on their opposite surfaces. The bottom of the guide plate 40 is connected to a horizontally arranged support rod 42. The bottom of the guide plate 40 and the support rod 42 are connected to a support frame 43.

[0035] When the pneumatic clamping component 10 releases the clamping constraint on both ends of the expansion roller 6, the expansion roller 6, together with the geotextile roll, loses its clamping support and falls downward into the guide groove 41 between the two sets of guide plates 40. The guide grooves 41 on both sides form left and right limits on the expansion roller 6, restricting the expansion roller 6 from lateral displacement. The expansion roller 6 slides down along the inclined path of the guide groove 41 by its own weight, completing the automatic unloading. The unloading work does not require a crane or manual assistance. It relies on the material drop guide rail 39 to limit and guide the expansion roller 6, and relies on its own weight to complete the unloading, reducing the intensity of manual labor and improving the level of automation.

[0036] The guide plate 40 is fixedly connected to the support frame 43 via the support rod 42. The support frame 43 fixes the entire set of unloading guide rails 39 to the side of the equipment frame to ensure the stability of the unloading position and continuously receive the expansion roller 6 released from the clamping position. The guide plates 40 on both sides and the guide groove 41 form a constraint space to prevent the expansion roller 6 from shifting left and right or leaving the track when it rolls down, and to prevent the heavy-duty expansion roller 6 from falling accidentally and causing a safety accident, thereby improving the safety of equipment operation.

[0037] To prevent the geotextile from loosening during the downward rolling of the expansion roller 6, as an embodiment of the present invention, such as... Figures 2 to 10 As shown, the upper inner side of the guide groove 41 is provided with an anti-slip layer structure 44, and the lower inner side of the guide groove 41 is designed to be smooth. When the expansion roller 6 slides down along the material drop guide track 39, the end faces of the expansion roller 6 continuously rub against the anti-slip layer structure 44, and the expansion roller 6 rotates by relying on the friction force, so that the outer geotextile roll is continuously wrapped and tightened.

[0038] In use, the expansion roller 6, together with the geotextile roll, is released from the pneumatic clamp 10 and falls into the guide groove 41, sliding down along the guide groove 41. The end faces of the two roller shafts of the expansion roller 6 first contact the anti-slip layer structure 44 on the upper inner side of the guide groove 41. During the downward movement, the anti-slip layer structure 44 generates frictional resistance with the end face of the expansion roller 6. The frictional force acts on the end of the roller shaft of the expansion roller 6, driving the expansion roller 6 to rotate in the opposite direction of rolling.

[0039] The expansion roller 6 rotates to continuously wrap the outer geotextile, preventing the geotextile from loosening when the expansion roller 6 rolls down. When the expansion roller 6 slides down to the smooth area at the bottom of the guide groove 41, the frictional resistance is greatly reduced, the rotation effect is weakened, and the roll material continues to slide down in a tight state until the unloading is completed.

[0040] To facilitate control of the downward sliding speed of the expansion roller 6, as one embodiment of the present invention, such as Figures 2 to 10 As shown, the anti-slip layer structure includes a hollow rubber strip, which is bonded to the upper inner side of the guide groove 41; the hollow rubber strip is filled with hydraulic oil, and a damping regulating valve 45 is installed on the side of the guide plate 40. Both ends of the hollow rubber strip are connected to the damping regulating valve 45.

[0041] When in use, when the end face of the expansion roller 6 presses against the hollow rubber belt, the hollow rubber belt undergoes elastic deformation, and the internal hydraulic oil circulates through the damping regulating valve 45 under the pressure. By adjusting the flow opening of the damping regulating valve 45, the flow resistance of the hydraulic oil can be changed, thereby adjusting the response speed of the hollow rubber belt under pressure deformation.

[0042] As the expansion roller 6 slides down the guide groove 41 and continuously contacts the hollow rubber belt, it relies on the friction between the rubber belt and the roller end face to provide the self-rotation driving force. For geotextile rolls of different weights and roll diameters, the damping regulating valve 45 is adjusted to change the buffer characteristics and friction contact pressure of the hollow rubber belt, so as to avoid excessive slippage speed causing the roll to be over-tightened and the fabric surface to be damaged.

[0043] To ensure the stability of the transmission drive structure 22, as one embodiment of the present invention, such as Figures 2 to 8As shown, the variable speed drive structure 22 includes a drive motor 23 and a friction transmission disk 24 connected to the output shaft of the drive motor 23. A friction wheel 25 is provided below the axis of the friction transmission disk 24 to drive the friction transmission disk 24. The friction wheel 25 is coaxially connected to the transmission shaft 26. The upper end of the transmission shaft 26 passes through the sliding base 11 and is rotatably connected to the sliding base 11. A worm 21 that meshes with the worm gear 20 is fixedly installed at the top of the transmission shaft 26. When the pneumatic clamping member 10 rises, it drives the friction wheel 25 to offset radially relative to the friction transmission disk 24, reducing the transmission radius between the friction wheel 25 and the friction transmission disk 24. A motor bracket 27 is installed at the bottom of the drive motor 23. A truss 28 is connected between the bottoms of the two sets of side frames 5. The truss 28 is fixedly connected to the motor bracket 27.

[0044] In use, the drive motor 23 continuously drives the friction transmission disk 24 to rotate at a constant speed. The friction transmission disk 24 transmits torque to the friction wheel 25. The friction wheel 25 drives the worm 21 to rotate through the transmission shaft 26. The worm 21 meshes with the worm wheel 20, thereby driving the spline sleeve 14 and expansion roller 6 inside the pneumatic clamping component 10 to rotate, so as to realize the winding of the geotextile.

[0045] As the geotextile continues to wind up, the outer diameter of the roll increases, causing the expansion roller 6 to rise. This, in turn, moves the sliding base 11, drive shaft 26, and friction wheel 25 upwards. The friction wheel 25 experiences a radial position shift relative to the friction drive disc 24, changing its effective friction drive radius. With the drive motor 23 maintaining a constant speed, the output speed of the friction wheel 25 automatically adjusts. As the roll diameter increases, the effective drive radius of the friction wheel 25 decreases, and the speed of the friction wheel 25 decreases, thereby reducing the rotational angular velocity of the expansion roller 6, compensating for the change in the roll radius, and maintaining a relatively constant geotextile winding speed.

[0046] The motor bracket 27 fixes the drive motor 23 on the truss 28. The truss 28 is mounted on the bottom of the two sets of side frames 5 to ensure that the drive motor 23 and the friction transmission disk 24 are fixed in position, providing a stable installation reference for the friction transmission pair.

[0047] To achieve timing control, as one embodiment of the present invention, such as Figures 2 to 3 As shown, the top of the sliding track 9 is provided with an energy storage and pressure supply component 34. The energy storage and pressure supply component 34 moves upward with the pneumatic clamping component 10 to compress and store pressure. The energy storage and pressure supply component 34 is connected to the pneumatic cutting component 29 through the main time-delay pressure relief valve. The pneumatic cutting component 29 is connected to the telescopic cylinder 13 through the secondary time-delay pressure relief valve. After the clamping component rises to the limit height of the track, the air pressure is supplied through the main time-delay pressure relief valve to first drive the pneumatic cutting component 29 to cut the fabric. After the pneumatic cutting component 29 cuts the fabric, the air pressure is then driven through the secondary time-delay pressure relief valve to drive the telescopic cylinder 13 to release the clamping connector 16 and release the expansion roller 6.

[0048] In use, the pneumatic clamping member 10 moves continuously upward along the sliding track 9 as the diameter of the geotextile roll increases, continuously compressing the energy storage and pressure supply member 34 during the upward movement to complete energy storage and air storage. When the pneumatic clamping member 10 moves to the limit height of the sliding track 9, the geotextile roll reaches the preset roll diameter, and the internal pressure of the energy storage and pressure supply member 34 reaches the release threshold. The airflow is first delivered to the pneumatic cutting assembly 29 through the main delayed pressure relief valve to start the cutting action. While the pneumatic cutting assembly 29 is working, as the air pressure in the pneumatic telescopic cylinder 31 rises to the pressure relief threshold of the secondary delayed pressure relief valve, the secondary delayed pressure relief valve delivers compressed air to the telescopic cylinder 13, driving the telescopic cylinder 13 to pull the spline shaft 15 back, and the snap joint 16 disengages from the snap groove 18 of the expansion roller 6 shaft, releasing the clamping constraint of the expansion roller 6 and completing the release of the roller.

[0049] The entire operation relies on pneumatic components and two-stage delay valves to achieve the timing logic of cutting the fabric first and then loosening the rollers, eliminating the need for electrical timing controllers such as PLCs and proximity switches. It should be noted that the energy storage and pressure supply component 34 can be an automatically reset pressure supply cylinder and connected to a one-way air intake connector to facilitate the subsequent automatic air intake and extension of the pressure supply cylinder. In order to adapt to the geotextile winding work of different roll diameters, the pressure relief opening threshold of the main delay pressure relief valve can be adjusted to achieve automatic opening at the corresponding roll diameter.

[0050] To facilitate the accurate descent of the expansion roller 6 onto the guide rail, as one embodiment of the present invention, such as... Figures 4 to 6 As shown, the sliding base 11 is provided with a support frame 35 on the side near the expansion roller 6. The side of the support frame 35 near the pneumatic cutting assembly 29 is connected to one end of the damping telescopic rod 37. The damping telescopic rod 37 is connected to the side of the sliding base 11 through an elastic hinge shaft 38. The support frame 35 is provided with a groove 36 for supporting the roller shaft of the expansion roller 6. After the support frame 35 receives the falling expansion roller 6, the support frame 35 swings towards the material drop guide rail 39 and stretches the damping telescopic rod 37, so that the lower end of the support frame 35 is connected to the material drop guide rail 39.

[0051] In use, when the telescopic cylinder 13 drives the snap-fit ​​connector 16 to retract and release the clamping constraint of the expansion roller 6, the expansion roller 6 falls downward and into the groove 36 of the support frame 35. The weight of the expansion roller 6 and the geotextile roll can drive the support frame 35 to swing around the elastic hinge axis 38 towards the material drop guide track 39. During the swing, the damping telescopic rod 37 is stretched first. After the damping telescopic rod 37 swings and extends to its limit, the end of the support frame 35 connects with the lower part of the material drop guide track 39, and the expansion roller 6 can disengage from the groove 36 and fall along the support frame 35 and roll into the material drop guide track 39, completing the unloading transfer.

[0052] After unloading is completed, the damping telescopic rod 37 retracts and swings back to pull the support frame 35 back to its initial standby position, waiting to receive the next expansion roller 6. It should be noted that the weight of the unloaded expansion roller 6 is insufficient to drive the support frame 35 to overcome the elastic force of the elastic hinge shaft 38 and swing, thereby ensuring the stability of the unloaded expansion roller 6.

[0053] In operation, the polyester raw material is sequentially spunbonded into a filament fiber web blank by the spunbonding web forming unit 1. The fiber web blank is needle-punched and entangled by the needle-punching reinforcement unit 2. After being heat-set by the heat-setting unit 3, a continuous and flat polyester filament nonwoven geotextile is formed. The formed geotextile is continuously conveyed to the finished product winding unit 4 for winding and collecting.

[0054] During the operation of the finished product winding unit 4, the expansion roller 6 is mounted between two sets of side frames 5, supported by the rigid support roller 7 on the lower feed side and the elastic support roller 8 on the discharge side. The rigid support roller 7 can effectively bear the winding load, suppress the bending deformation of the expansion roller 6, and ensure the flatness of the ultra-wide geotextile winding. The elastic support roller 8 normally assists in supporting the roller body, providing a structural foundation for subsequent unloading. When the equipment loads the roller, the telescopic cylinder 13 of the pneumatic clamping component 10 pushes the spline shaft 15 to move axially. With the help of the guide chamfer 17 at the end of the snap-fit ​​connector 16, it automatically centers and corrects the deviation, smoothly embedding into the snap-fit ​​groove 18 at the end of the expansion roller 6, realizing the axial limit and circumferential locking of the expansion roller 6.

[0055] During the winding operation, the drive motor 23 drives the friction transmission disk 24 to rotate, which in turn drives the friction wheel 25, transmission shaft 26, and worm gear 21 to rotate via friction transmission. The worm gear 20 then drives the spline sleeve 14 and spline shaft 15 to rotate and wind the expansion roller 6 to wind the geotextile. As winding continues, the outer diameter of the geotextile roll increases, causing the expansion roller 6 and pneumatic clamping device 10 to slide upward along the vertical sliding track 9. This reduces the effective transmission radius of the friction wheel 25 and friction transmission disk 24, automatically reducing the rotational angular velocity of the expansion roller 6, thereby compensating for the impact of the roll diameter change on the geotextile winding speed.

[0056] When the geotextile roll is wound to the preset size, the pneumatic clamp 10 moves upward to the limit position of the sliding track 9. During the upward movement, the pressure storage and supply component 34 is compressed to complete the pressure storage. After reaching the preset stroke, the pressure storage and supply component 34 supplies air first through the main delayed pressure relief valve, driving the pneumatic telescopic cylinder 31 to drive the movable blade 32 downward to complete the flat cutting of the geotextile. After the cutting is completed, the air pressure is delayed and conducted through the secondary delayed pressure relief valve, driving the telescopic cylinder 13 to retract, driving the clamping joint 16 to disengage from the clamping groove 18 of the expansion roller 6, releasing the clamping constraint on the expansion roller 6, realizing the pneumatic timing linkage of cutting the fabric first and then releasing the roller, avoiding fabric pulling and loosening of the roll.

[0057] After the clamping constraint is released, the fully loaded geotextile expansion roller 6 presses down on the discharge side elastic support roller 8 under its own weight, causing the elastic support roller 8 to undergo radial elastic deformation. This releases the rigid support limit, and the expansion roller 6 tilts and falls towards the discharge side under its own weight and the weight of the geotextile, falling into the support bracket 35 groove 36 on the side of the sliding base 11. The support bracket 35 is driven to swing by the weight of the roller body and the weight of the geotextile, which drives the damping telescopic rod 37 to extend and align with the lower discharge guide rail 39, allowing the expansion roller 6 to roll smoothly into the guide groove 41 between the two sets of guide plates 40.

[0058] As the expansion roller 6 slides down the guide groove 41, both ends of the roller shaft make frictional contact with the hollow elastic anti-slip layer structure on the upper part of the guide groove 41. The sliding friction drives the expansion roller 6 to rotate autonomously, performing secondary winding and tightening of the rolled geotextile, effectively preventing the roll material from loosening and fraying during unloading. The lower part of the guide groove 41 adopts a smooth structure to ensure smooth and unobstructed descent of the roller. At the same time, the hydraulic oil flow resistance inside the hollow elastic band can be adjusted through the damping regulating valve 45 to adapt to geotextile rolls of different weights and diameters, precisely controlling the friction force and the tightening effect of the roll material.

[0059] After the expansion roller 6 of the fabric roll is disengaged from the support frame 35, the damping telescopic rod 37 automatically retracts and swings back, causing the support frame 35 to automatically reset. After the equipment replaces the roll paper tube and re-clamps the expansion roller 6, a new round of continuous geotextile winding operation can be started, realizing the automated continuous production of the entire set of equipment.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous production apparatus for ultra-wide polyester filament nonwoven geotextiles, characterized in that, It includes a spunbond web forming unit (1), a needle punching reinforcement unit (2), a heat setting unit (3), and a finished product winding unit (4) connected sequentially along the material conveying direction; The finished product winding unit (4) includes two sets of side frames (5) arranged symmetrically, with an expansion roller (6) for winding geotextile between the two sets of side frames (5); a rigid support roller (7) is provided on the side of the expansion roller (6) near the fabric feeding direction, and an elastic support roller (8) is provided on the side of the expansion roller (6) near the fabric discharge direction. The two ends of the rigid support roller (7) and the elastic support roller (8) are rotatably connected to the corresponding side frame (5); each set of side frames (5) is fixedly provided with a vertically arranged sliding track (9). A pneumatic clamping component (10) is slidably mounted on the sliding track (9). The pneumatic clamping component (10) is used to clamp the end of the limiting expansion roller (6). A variable speed drive structure (22) is provided below the pneumatic clamping component (10) and is used to drive the pneumatic clamping component (10). The variable speed drive structure (22) is used to adaptively adjust the rotation speed of the expansion roller (6) according to the lifting height of the pneumatic clamping component (10). A pneumatic cutting component (29) for cutting geotextile is installed on one side of the expansion roller (6) in the feeding direction.

2. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 1, characterized in that, The pneumatic cutting assembly (29) includes a movable blade (32), a cutting bracket (30) connected between two sets of side frames (5) is provided above the movable blade (32), a number of pneumatic telescopic cylinders (31) are installed on the cutting bracket (30), the piston rod end of the pneumatic telescopic cylinder (31) is fixedly connected to the upper end of the movable blade (32), and a cutting worktable (33) connected between two sets of side frames (5) is provided below the cutting bracket (30).

3. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 2, characterized in that, The pneumatic clamping component (10) includes a sliding base (11), a slider (12) that slides and engages with the sliding rail (9) is connected to the side of the sliding base (11), a telescopic cylinder (13) is installed at the end of the sliding base (11) away from the expansion roller (6), a spline sleeve (14) is rotatably connected inside the sliding base (11), a spline shaft (15) is slidably connected inside the spline sleeve (14), a snap-fit ​​connector (16) is fixedly connected at the end of the spline shaft (15) near the expansion roller (6), a guide chamfer (17) structure is provided on the end face of the snap-fit ​​connector (16), and snap-fit ​​grooves (18) that engage with the snap-fit ​​connector (16) are provided at both ends of the roller shaft of the expansion roller (6), and the piston rod end of the telescopic cylinder (13) is connected to the spline shaft (15) through a rotating component (19); a worm gear (20) that drives the speed change drive structure (22) is fixedly connected to the outside of the spline sleeve (14).

4. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 3, characterized in that, The expansion roller (6) is provided with a material drop guide rail (39) on the side away from the pneumatic cutting assembly (29). The material drop guide rail (39) includes two sets of symmetrically arranged guide plates (40). The two sets of guide plates (40) are provided with guide grooves (41) for guiding the expansion roller (6) on their opposite sides. The bottom of the guide plate (40) is connected to a horizontally arranged support rod (42). The bottom of the guide plate (40) and the support rod (42) are connected to a support frame (43).

5. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 4, characterized in that, The upper inner side of the guide groove (41) is provided with an anti-slip layer structure (44), and the lower inner side of the guide groove (41) is designed to be smooth. When the expansion roller (6) slides down along the material drop guide track (39), the two end faces of the expansion roller (6) continuously rub against the anti-slip layer structure (44), and the expansion roller (6) rotates by friction, so that the outer geotextile roll is continuously wrapped and tightened.

6. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 5, characterized in that, The anti-slip layer structure includes a hollow rubber strip, which is bonded to the upper inner side of the guide groove (41); the hollow rubber strip is filled with hydraulic oil, and a damping regulating valve (45) is installed on the side of the guide plate (40); both ends of the hollow rubber strip are connected to the damping regulating valve (45).

7. A continuous production apparatus for ultra-wide polyester filament nonwoven geotextiles according to claim 6, characterized in that, The variable speed drive structure (22) includes a drive motor (23) and a friction transmission disk (24) connected to the output shaft of the drive motor (23). A friction wheel (25) is provided below the axis of the friction transmission disk (24) to drive the friction transmission disk (24). The friction wheel (25) is coaxially connected to the transmission shaft (26). The upper end of the transmission shaft (26) passes through the sliding base (11) and is rotatably connected to the sliding base (11). A worm (21) that meshes with the worm gear (20) is fixedly installed at the top of the transmission shaft (26). When the pneumatic clamp (10) rises, it drives the friction wheel (25) to offset radially relative to the friction transmission disk (24), reducing the transmission radius between the friction wheel (25) and the friction transmission disk (24). A motor bracket (27) is installed at the bottom of the drive motor (23). A truss (28) is connected between the bottoms of the two sets of side frames (5). The truss (28) is fixedly connected to the motor bracket (27).

8. The continuous production apparatus for ultra-wide polyester filament nonwoven geotextile according to claim 7, characterized in that, The sliding track (9) is provided with an energy storage and pressure supply component (34) at the top. The energy storage and pressure supply component (34) moves up with the pneumatic clamping component (10) to compress and store pressure. The energy storage and pressure supply component (34) is connected to the pneumatic cutting component (29) through the main time-delay pressure relief valve. The pneumatic cutting component (29) is connected to the telescopic cylinder (13) through the secondary time-delay pressure relief valve. After the clamping component rises to the limit height of the track, the air pressure is supplied through the main time-delay pressure relief valve to first drive the pneumatic cutting component (29) to cut the fabric. After the pneumatic cutting component (29) cuts the fabric, the air pressure is then driven through the secondary time-delay pressure relief valve to drive the telescopic cylinder (13) to release the clamping joint (16) and release the expansion roller (6).

9. A continuous production apparatus for ultra-wide polyester filament nonwoven geotextiles according to claim 8, characterized in that, The sliding base (11) is provided with a support frame (35) on the side near the expansion roller (6). The support frame (35) is connected to one end of the damping telescopic rod (37) on the side near the pneumatic cutting assembly (29). The damping telescopic rod (37) is connected to the side of the sliding base (11) through an elastic hinge shaft (38). The support frame (35) is provided with a groove (36) for supporting the roller shaft of the expansion roller (6). After the support frame (35) receives the falling expansion roller (6), the support frame (35) swings towards the material drop guide rail (39) and stretches the damping telescopic rod (37) so that the lower end of the support frame (35) is connected to the material drop guide rail (39).

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