A double-belt unwinding tension control device

Abstract

A dual-belt unwinding tension control device includes a frame, a first guide rail, a second guide rail, a speed regulating wheel, and a tension wheel. The first and second guide rails are installed on the frame at intervals. The speed regulating wheel is movably mounted on the first guide rail and is connected to a corresponding drive mechanism. The frame corresponding to the top of the first guide rail is symmetrically provided with two first steering wheels. The first fabric tape drawn from the warp beam passes through the first steering wheel at the front end, the speed regulating wheel, and the first steering wheel at the rear end before entering the drying drum. The frame corresponding to the top of the second guide rail is symmetrically provided with two second steering wheels. The tension wheel is slidably mounted on the second guide rail. The second fabric tape drawn from the warp beam passes through the second steering wheel at the front end, the tension wheel, and the second steering wheel at the rear end before entering the drying drum. This tension control device can stabilize the tension of the two fabric tapes and minimize tension fluctuations, reduce quality differences between the two fabric tapes, reduce frequent abnormal shutdowns of the fabric tapes, and improve production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tensioning strip materials, and more particularly to a double-belt unwinding tension control device. Background Art

[0002] Fabric strips are typically dyed using the warp-beam dyeing method, where two fabric strips are wound simultaneously around a warp beam. After dyeing, the strips are unwound from the beam and then wound onto a high-temperature drying drum for drying. After drying, the strips are cooled and subsequently dried. The unwinding process is as follows: After unwinding from the beam, the two strips pass over the same speed-regulating wheel before entering the drying drum. The speed-regulating wheel's high and low position controls the warp beam's speed, ensuring a continuous unwinding of the strips. Simultaneously, the weight of the speed-regulating wheel provides tension on the two strips, straightening them and ensuring they adhere tightly to the chute on the hot drying drum surface, promoting drying and shaping.

[0003] However, due to reasons such as different shrinkage of the fabric strips during dyeing, the two fabric strips exiting the warp beam are of unequal lengths. When passing the speed regulating wheel, the shorter fabric strip mainly bears the weight of the speed regulating wheel, while the longer fabric strip is in a relaxed state. This causes excessive tension on one side, causing the fabric strip to stretch, while the other side shrinks without tension, resulting in quality differences between the two sides. Sometimes the longer fabric strip will remain for a long time and trigger the broken tape automatic stop sensor, causing frequent shutdowns and affecting normal production. The tension-free side of the fabric strip jumps on the surface of the drying drum and cannot be stably fixed in the chute, making it impossible to shape the fabric strip into a stable curvature. Summary of the Invention

[0004] The present invention provides a double-belt unwinding tension control device, the main purpose of which is to overcome the shortcomings of the existing two belts on the same warp beam when unwinding, such as different belt lengths causing quality differences on both sides of the belts, frequent shutdowns, and inability to shape stable curved belts.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A double-belt unwinding tension control device comprises a frame, a first guide rail, a second guide rail, a speed regulating wheel, and a tension wheel. The first guide rail and the second guide rail are installed on the frame at intervals and in parallel. The speed regulating wheel is movably installed on the first guide rail, and the speed regulating wheel is correspondingly connected to a driving mechanism. Two first steering wheels are symmetrically provided on the frame corresponding to the top end of the first guide rail. The first cloth tape led out from the warp shaft passes through the first steering wheel at the front end, the speed regulating wheel and the first steering wheel at the rear end in sequence to enter the drying drum; two second steering wheels are symmetrically provided on the frame corresponding to the top end of the second guide rail, and the tension wheel can be freely slidably mounted on the second guide rail. The second cloth tape led out from the warp shaft passes through the second steering wheel at the front end, the tension wheel and the second steering wheel at the rear end in sequence to enter the drying drum.

[0007] Furthermore, the vertical plane where the central axis of each first steering wheel is located is tangent to both sides of the speed regulating wheel; the vertical plane where the central axis of each second steering wheel is located is tangent to both sides of the tension wheel.

[0008] Furthermore, the upper length of the second guide rail corresponding to the above-mentioned tension wheel is H1, and the lower length of the second guide rail corresponding to the below-mentioned tension wheel is H2; when the length of the first cloth tape is greater than the length of the second cloth tape, the tension wheel is at the upper position of the second guide rail, and the device can adjust the length of the first cloth tape - the length of the second cloth tape ≤ 2*H1; when the length of the first cloth tape is less than the length of the second cloth tape, the tension wheel is at the lower position of the second guide rail, and the device can adjust the length of the second cloth tape - the length of the first cloth tape ≤ 2*H2.

[0009] When the length difference between the first and second tapes is less than 2*H1 or less than 2*H2, production will not be interrupted. When the length difference between the first and second tapes is greater than 2*H1 or 2*H2, the equipment will automatically stop and cannot continue production.

[0010] Furthermore, the frame is also provided with a third guide rail located beside the second guide rail, an emergency buffer wheel is correspondingly provided at the lower part of the third guide rail, and two third steering wheels are provided on both sides of the upper part of the third guide rail. The first cloth belt led out from the first steering wheel at the rear end passes through the third steering wheel at the front end, the emergency buffer wheel and the third steering wheel at the rear end in sequence and then enters the drying drum; the second cloth belt led out from the second steering wheel at the rear end passes through the third steering wheel at the front end, the emergency buffer wheel and the third steering wheel at the rear end in sequence and then enters the drying drum.

[0011] Preferably, the above-mentioned driving mechanism includes a motor, a driving wheel, a belt and a driven wheel. The motor is fixedly mounted on the support frame through a motor bracket. The driving wheel and the driven wheel are respectively installed at positions corresponding to the top and bottom ends of the support frame and the first guide rail. The output shaft of the motor is connected to the driving wheel, and the driving wheel and the driven wheel are connected by the belt. The speed regulating wheel is fixedly connected to the belt through a connecting piece.

[0012] Furthermore, a highest point position sensor and a lowest point position sensor are respectively provided on the upper portion and the lower portion of the first guide rail.

[0013] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the beneficial effects produced by the present invention are:

[0014] The invention uses two independent tension control components to control the tension of the two fabric tapes respectively, so that the two fabric tapes are in a tensioned state. One of the tension components contains a speed regulating wheel, which is not only used to adjust the speed of the first fabric tape so that the warp beam unwinding matches the speed of the drying drum winding tape, but also serves as a reference for adjusting the second fabric tape; while the other tension component uses a tension wheel, which can slide freely along the second slide rail. When the length of the first fabric tape is greater than the length of the second fabric tape, the tension wheel slides along the upper part of the second slide rail. When the length of the first fabric tape is less than the length of the second fabric tape, the tension wheel slides along the lower part of the second slide rail. Therefore, the tension control device of the present invention can make the tension of the two fabric tapes equal, the tension fluctuation is small, the tension is stable, and the quality difference of the fabric tapes on both sides is reduced; and the fabric tapes can be stably wound in the inclined groove on the surface of the drying drum, and can be shaped into a fabric tape with a stable curvature; reduce the frequent abnormal shutdown of the fabric tape and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 Schematic diagram of the winding of two cloth tapes of the present invention. DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are described below with reference to the accompanying drawings. In order to fully understand the present invention, many details are described below, but for those skilled in the art, the present invention can be implemented without these details.

[0018] A double belt unwinding tension control device, referring to Figure 1 , including a frame 1, a first guide rail 20, a second guide rail 30, a speed regulating wheel 40, and a tension wheel 50. The first guide rail 20 and the second guide rail 30 are installed on the frame 1 in parallel and at intervals, and the speed regulating wheel 40 is movably installed on the first guide rail 20, and the speed regulating wheel 40 is correspondingly connected to a driving mechanism.

[0019] Reference Figure 1 The driving mechanism includes a motor 41, a driving pulley 42, a belt 43, and a driven pulley 44. The motor 41 is fixedly mounted on a support frame 46 via a motor bracket 45. The driving pulley 42 and the driven pulley 44 are respectively mounted on the support frame 46 at positions corresponding to the top and bottom ends of the first guide rail 2. The output shaft of the motor 41 is connected to the driving pulley 42, and the driving pulley 42 and the driven pulley 44 are connected via the belt 43. The speed regulating pulley 40 is fixedly connected to the belt 43 via a connector 401.

[0020] Reference Figure 1 and Figure 2Two first steering wheels 21 are symmetrically provided on the frame 1 corresponding to the top end of the first guide rail 20. The vertical plane where the central axis of each first steering wheel 21 lies is tangent to both sides of the speed regulating wheel. Two second steering wheels 31 are symmetrically provided on the frame 1 corresponding to the top end of the second guide rail 30. The tension wheel 50 is freely slidably mounted on the second guide rail 30. The vertical plane where the central axis of each second steering wheel 31 lies is tangent to both sides of the tension wheel 50.

[0021] Reference Figure 1 and Figure 2 A third guide rail 60 located next to the second guide rail 30 can also be installed on the frame of the present invention. An emergency buffer wheel 70 is correspondingly provided at the lower part of the third guide rail 60. The emergency buffer wheel 70 can provide a certain buffer space for repairing the cloth belt in emergency situations such as wire breakage.

[0022] Reference Figure 1 and Figure 2 Two third steering wheels 61 are provided on both sides of the upper part of the above-mentioned third guide rail 60. The two third steering wheels are preferably symmetrically arranged on both sides of the vertical plane where the central axis of the emergency buffer wheel is located, and the center distance between them is not less than the diameter of the emergency buffer wheel 70.

[0023] Reference Figure 2 , Figure 2 The drive mechanism is not shown. The first fabric tape drawn from the warp beam 2 sequentially passes through the first deflection wheel 21 at the front end, the speed regulating wheel 40, and the first deflection wheel 21 at the rear end. Under the weight of the speed regulating wheel 40, the first fabric tape on both sides is in a tensioned state and perpendicular to the side of the speed regulating wheel 30. The first fabric tape drawn from the rear first deflection wheel 21 then passes through the third deflection wheel 61 at the front end, the emergency buffer wheel 70, and the third deflection wheel 61 at the rear end before entering the drying drum 3. The second fabric tape drawn from the warp beam 2 sequentially passes through the second deflection wheel 31 at the front end, the tension wheel 50, and the second deflection wheel 31 at the rear end. Under the weight of the tension wheel 50, the second fabric tape on both sides is in a tensioned state and perpendicular to the side of the tension wheel 50. The second fabric tape drawn from the rear second deflection wheel 31 then passes through the third deflection wheel 61 at the front end, the emergency buffer wheel 70, and the third deflection wheel 61 at the rear end before entering the drying drum 3.

[0024] Reference Figure 2 The upper length of the second guide rail above the tension wheel 50 is H1, and the lower length of the second guide rail below the tension wheel 50 is H2. The total height of the second guide rail is H=H1+H2. When the machine is turned on and the tension wheel 4 is in the middle position, H1=H2=0.5H. Increasing the height of the guide rail H can improve the device's ability to adjust the length difference of the cloth tape.

[0025] When the length of the first cloth tape is greater than that of the second cloth tape, the tension wheel 50 is at the upper position of the second guide rail, and the device can adjust the length of the first cloth tape - the length of the second cloth tape ≤ 2*H1; when the length of the first cloth tape is less than the length of the second cloth tape, the tension wheel 50 is at the lower position of the second guide rail, and the device can adjust the length of the second cloth tape - the length of the first cloth tape ≤ 2*H2.

[0026] When the length difference between the first and second tapes is less than 2*H1 or less than 2*H2, production will not be interrupted. When the length difference between the first and second tapes is greater than 2*H1 or 2*H2, the equipment will automatically stop and cannot continue production.

[0027] Reference Figure 1 The upper and lower portions of the first guide rail 20 are equipped with a maximum position sensor 201 and a minimum position sensor 202, respectively. If a production anomaly occurs, such as when the warp beam 2 unwind motor is running too slowly, the speed regulating wheel 40 will rise to the maximum position sensing point, causing the drying drum to stop. If the warp beam 2 unwind motor is running too fast, the speed regulating wheel 40 will descend to the minimum position sensing point, causing the drying drum to stop. After the machine is shut down, the problem is manually inspected and, once resolved, production can be resumed.

[0028] The speed regulating wheel 40 and the tension wheel 50 of the present invention can both use gravity wheels to provide tension, but are not limited to the use of gravity wheels. They can also be other devices that can provide tension, such as levers.

[0029] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A double-belt unwinding tension control device, characterized by: The trolley assembly comprises a frame, a first guide rail, a second guide rail, a speed regulating wheel and a tension wheel. The first guide rail and the second guide rail are installed on the frame at intervals and in parallel. The speed regulating wheel is movably installed on the first guide rail, and the speed regulating wheel is correspondingly connected to a driving mechanism. Two first steering wheels are symmetrically provided on the frame corresponding to the top end of the first guide rail. The first cloth tape led out from the warp shaft passes through the first steering wheel at the front end, the speed regulating wheel and the first steering wheel at the rear end in sequence to enter the drying cylinder; two second steering wheels are symmetrically provided on the frame corresponding to the top end of the second guide rail. The tension wheel can be freely slidably mounted on the second guide rail. The second cloth tape led out from the warp shaft passes through the second steering wheel at the front end, the tension wheel and the second steering wheel at the rear end in sequence to enter the drying cylinder.

2. A double-belt unwinding tension control device according to claim 1, characterized in that: The vertical plane where the central axis of each first steering wheel is located is tangent to both sides of the speed regulating wheel; the vertical plane where the central axis of each second steering wheel is located is tangent to both sides of the tension wheel.

3. A double-belt unwinding tension control device according to claim 2, characterized in that: The upper length of the second guide rail corresponding to the tension wheel is H1, and the lower length of the second guide rail corresponding to the tension wheel is H2; when the length of the first cloth tape is greater than the length of the second cloth tape, the tension wheel is at the upper position of the second guide rail, and the device can adjust the length of the first cloth tape - the length of the second cloth tape ≤ 2*H1; when the length of the first cloth tape is less than the length of the second cloth tape, the tension wheel is at the lower position of the second guide rail, and the device can adjust the length of the second cloth tape - the length of the first cloth tape ≤ 2*H2.

4. A double-belt unwinding tension control device according to claim 3, characterized in that: When the first tape length minus the second tape length is less than 2*H1, or the second tape length minus the first tape length is less than 2*H2, production will not be interrupted. When the first tape length minus the second tape length is greater than 2*H1, or the second tape length minus the first tape length is greater than 2*H2, the equipment will automatically shut down and cannot continue production.

5. The double-belt unwinding tension control device according to claim 1, characterized in that: The frame is further provided with a third guide rail located beside the second guide rail, the lower part of the third guide rail is correspondingly provided with an emergency buffer wheel, and two third steering wheels are provided on both sides of the upper part of the third guide rail. The first cloth belt led out from the first steering wheel at the rear end passes through the third steering wheel at the front end, the emergency buffer wheel and the third steering wheel at the rear end in sequence before entering the drying drum; the second cloth belt led out from the second steering wheel at the rear end passes through the third steering wheel at the front end, the emergency buffer wheel and the third steering wheel at the rear end in sequence before entering the drying drum.

6. A double-belt unwinding tension control device according to claim 1, characterized in that: The driving mechanism includes a motor, a driving wheel, a belt and a driven wheel. The motor is fixedly mounted on a support frame through a motor bracket. The driving wheel and the driven wheel are respectively mounted on positions of the support frame corresponding to the top and bottom ends of the first guide rail. The output shaft of the motor is connected to the driving wheel, and the driving wheel and the driven wheel are connected by the belt. The speed regulating wheel is fixedly connected to the belt through a connecting piece.

7. The double-belt unwinding tension control device according to claim 1, characterized in that: The upper part and the lower part of the first guide rail are respectively provided with a highest point position sensor and a lowest point position sensor.

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