A drying device for all-cotton fabric

Abstract

This utility model relates to the technical field of fabric production equipment, specifically a drying device for all-cotton fabric, including an airflow fluffing mechanism. The airflow fluffing mechanism includes: an airflow blowing assembly, including an air duct and nozzles connected to the air duct, the nozzles being linearly arrayed along the axis of the air duct; a pulse airflow generating assembly, including: an airflow chamber connected to an external high-pressure air source, and a turntable provided inside the airflow chamber, the turntable being driven to rotate by a first motor outside the airflow chamber; and a sealing assembly, including a magnetic sealing block slidably disposed at the inlet end of the air duct, controlling the communication state between the air duct and the airflow chamber. The pulse airflow generated by the airflow fluffing mechanism impacts the surface and fiber gaps of the squeezed and compacted all-cotton fabric, generating vibration and local stretching, effectively breaking the tight bonding between fibers, making the fabric fluffy, and significantly improving its air permeability and internal porosity.

Description

Technical Field

[0001] This utility model relates to the technical field of fabric production equipment, specifically a drying device for all-cotton fabrics. Background Technology

[0002] In the fabric production process, after dyeing or washing, the fabric needs to be dried. Existing fabric drying devices, such as the Chinese utility model patent with authorization announcement number CN221376206U, divide the interior of the drying device into a draining chamber and a drying chamber. The fabric is first squeezed and drained by the extrusion rollers in the draining chamber, and then enters the drying chamber for drying. Compared with ordinary drying devices where the fabric directly enters the drying chamber, this technical solution greatly reduces the moisture content of the fabric before entering the drying chamber, improves production efficiency, and reduces energy consumption.

[0003] However, the drying device in this technical solution still has shortcomings when processing all-cotton fabrics:

[0004] Compared to synthetic fibers and blended fabrics, pure cotton fabrics have extremely high hydrophilicity. Cotton fibers contain a large number of hydrophilic groups, which easily form a strong capillary water film between the fibers after compression, tightly "bonding" the fibers into a compacted state. In addition, pure cotton fabrics have low resilience; cotton fibers undergo significant plastic deformation after compression and are difficult to automatically spring back to their fluffy structure. Therefore, after pure cotton fabrics are squeezed and dehydrated by extrusion rollers, the wet fibers form a dense layer under mechanical compression, resulting in fiber compaction and reduced porosity. During subsequent drying operations, the fabric's air permeability decreases sharply, and the compacted layer hinders the penetration of hot air, thus reducing drying efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a drying device for all-cotton fabrics to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A drying device for all-cotton fabric includes a draining chamber and a drying chamber. A squeezing roller is provided in the draining chamber. The device is characterized in that at least one airflow fluffing mechanism is provided directly behind the squeezing roller in the draining chamber. The airflow fluffing mechanism includes:

[0008] An airflow purging assembly includes an air passage and nozzles communicating with the air passage, the nozzles being arranged in a linear array along the axis of the air passage;

[0009] The pulsed airflow generating component includes:

[0010] An airflow chamber is connected to an external high-pressure air source, and a turntable is provided inside the airflow chamber. The turntable is driven to rotate by a first motor outside the airflow chamber.

[0011] A sealing assembly includes a magnetic sealing block that is slidably disposed at the inlet end of the airway, controlling the communication state between the airway and the airflow chamber;

[0012] The turntable drives the sealing block to periodically change the connection state between the air passage and the airflow chamber through magnetic force.

[0013] Preferably, the sealing block includes a sealing block body and a sealing ring disposed on the sealing block body, and the sealing ring is opposite to the stepped surface disposed at the airway inlet end, and a first permanent magnet is embedded in the sealing block body;

[0014] The turntable end face is embedded with a second permanent magnet in a ring array. The cross-section of the second permanent magnet is arc-shaped, and the forward projection of the second permanent magnet can completely cover the first permanent magnet. The first permanent magnet and the second permanent magnet are magnetically attracted to each other.

[0015] Preferably, the sealing block is slidably disposed within the air passage via a linear ball bearing-guide rail assembly, and the linear ball bearing-guide rail assembly is provided in three sets.

[0016] Preferably, a spring is fitted onto one end of the guide rail of the linear ball bearing-guide rail assembly, and the spring is located at the end away from the air passage inlet.

[0017] Preferably, the air passage is located inside the cylinder and is far from the center of the cylinder, and the nozzle is mounted on the cylinder; the airflow chamber is located at one end near the cylinder.

[0018] Preferably, one end of the cylinder passes through the side wall of the drain chamber and is connected to a second motor via a gear set, and the cylinder is rotatably connected to the side wall of the drain chamber.

[0019] Preferably, the gear set includes a first gear, which is fixedly mounted on a cylinder and meshes with a second gear, which is fixedly connected to the drive shaft of the second motor.

[0020] Preferably, the first motor is an adjustable speed motor;

[0021] The drain chamber is equipped with a speed sensor, which is used to measure the speed of the cotton fabric after it exits the squeeze roller. The speed sensor is electrically connected to the control unit.

[0022] The control unit adjusts the rotation speed of the first motor in real time according to the speed measured by the speed sensor, so as to keep the number of pulse airflow impacts on the cotton fabric per unit length constant when it passes under the airflow fluffing mechanism.

[0023] The beneficial effects achieved by this utility model are as follows:

[0024] 1. The pulsed airflow generated by the airflow fluffing mechanism impacts the surface and fiber gaps of the compressed and compacted cotton fabric, producing vibration and local stretching, effectively breaking the tight bond between fibers, making the fabric fluffy, and significantly improving its breathability and internal porosity.

[0025] 2. On the other hand, pulsed airflow loosens the entire fabric through non-mechanical contact, avoiding fiber breakage, surface fuzzing, or stretching deformation caused by mechanical action. Attached Figure Description

[0026] Figure 1 This utility model is shown in the internal structure diagram after one side plate is cut open.

[0027] Figure 2 A schematic diagram of the overall structure of the airflow fluffing mechanism of this utility model;

[0028] Figure 3 This utility model Figure 2 The right view after removing the first motor, the second motor, and the second gear;

[0029] Figure 4 This utility model Figure 3 Sectional view at point AA;

[0030] Figure 5 This utility model Figure 3 An exploded view of a cylinder after being sectioned in half;

[0031] Figure 6 A schematic diagram of the structure of the sealing block of this utility model.

[0032] In the diagram: 1. Receiving roller; 2. Guide roller; 3. Conveying roller; 4. Drying chamber; 5. Heating device; 6. Fan; 7. Draining chamber; 8. Extrusion roller; 9. Airflow fluffing mechanism; 901. Nozzle; 902. Air passage; 903. Cylinder; 904. Airflow chamber; 905. Turntable; 906. First motor; 907. Sealing block; 908. First permanent magnet; 909. Second permanent magnet; 910. Sealing ring; 911. Spring; 912. Gear set; 913. Second motor; 914. Stepped surface. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides a technical solution:

[0035] See Figure 1 A drying device for all-cotton fabric includes a take-up roller 1 for winding up the all-cotton fabric, a guide roller 2 for guiding the all-cotton fabric, and a conveyor roller 3 for conveying the all-cotton fabric. It also includes a draining chamber 7 and a drying chamber 4. The drying chamber 4 is equipped with a heating device 5 and a fan 6. The fan 6 is used to drive the gas flow in the drying chamber 4 and discharge the evaporated water vapor. The draining chamber 7 is equipped with a squeezing roller 8. The structure and connection relationship between the structures described above are all existing technologies of existing fabric drying devices. For specific settings, please refer to the utility model patent with authorization announcement number CN220981849U or the utility model patent with authorization announcement number CN221376206U. The innovation of this application is that the draining chamber 7 is also equipped with an airflow fluffing mechanism 9. The pulsating airflow sprayed by the airflow fluffing mechanism 9 acts on the all-cotton fabric to solve the problem of fiber caking and decreased porosity of the all-cotton fabric.

[0036] At least one airflow fluffing mechanism 9 is provided along the moving direction of the cotton fabric and is located directly behind the squeeze roller 8. It is used to fluff the cotton fabric after squeezing and dehydration. The airflow fluffing mechanism 9 includes:

[0037] See Figure 4 or Figure 5 The airflow purging assembly includes an air passage 902 and a nozzle 901 communicating with the air passage 902. The nozzle 901 is arranged linearly along the axis of the air passage 902. The air passage 902 is arranged along the width direction of the cotton fabric moving in this drying device. The surface roughness of the inner wall of the air passage 902 should be as small as possible to reduce pressure drop.

[0038] The pulsed airflow generating component includes:

[0039] The airflow chamber 904 is connected to an external high-pressure air source through an air source interface. The pressure inside the airflow chamber 904 is regulated by a pressure regulating valve. The air pressure inside the airflow chamber 904 is adjusted according to parameters such as the fabric weight, fabric thickness, yarn count and twist, and fabric structure of the actual dried cotton fabric. A turntable 905 is provided inside the airflow chamber 904. The turntable 905 is driven to rotate by a first motor 906 outside the airflow chamber 904. Specifically, an exemplary configuration can be achieved using the following existing technology: the rotating shaft of the first motor 906 passes through the side wall of the airflow chamber 904 and is fixedly connected to the turntable 905. A rotary seal is formed between the rotating shaft of the first motor 906 and the side wall of the airflow chamber 904. The rotary seal between the rotating shaft of the first motor 906 and the side wall of the airflow chamber 904 can adopt sealing technologies commonly used in existing centrifugal compressor shaft seal technology, such as floating ring seals, dry gas seals, or labyrinth seals.

[0040] The sealing assembly includes a magnetic sealing block 907, which is slidably disposed at the inlet end of the air passage 902 and can slide along the axial direction of the air passage 902 to control the communication state between the air passage 902 and the airflow chamber 904.

[0041] The turntable 905 drives the sealing block 907 to periodically change the connection state between the airway 902 and the airflow chamber 904 through magnetic force.

[0042] See Figure 4 , Figure 6 The sealing block 907 includes a sealing block body and a sealing ring 910 disposed on the sealing block body. The sealing ring 910 is opposite to the stepped surface 914 disposed at the inlet end of the air passage 902. A first permanent magnet 908 is embedded on the sealing block body.

[0043] See Figure 4 , Figure 5 The turntable 905 has a ring array of embedded second permanent magnets 909 on its end face. The cross-section of the second permanent magnet 909 is arc-shaped, and the forward projection of the second permanent magnet 909 can completely cover the first permanent magnet 908. The first permanent magnet 908 and the second permanent magnet 909 are magnetically attracted to each other. During the rotation of the turntable 905, the first permanent magnet 908 can be completely within the forward projection of the second permanent magnet 909 for a period of time. At this time, the magnetic attraction is at its maximum, and the sealing block 907 moves axially and squeezes and fits against the platform at the inlet end of the air passage 902. The step surface 914 cuts off the connection between the air passage 902 and the airflow cavity 904. Then, as it rotates, the first permanent magnet 908 is completely offset from the second permanent magnet 909. For a period of time, the gap between the two sets of second permanent magnets 909 in the ring array is closed. Under the action of the air pressure in the airflow cavity 904, the sealing block 907 moves away from the inlet of the air passage 902, and the air passage 902 is connected to the airflow cavity 904. The first permanent magnet 908 and the second permanent magnet 909 can be made of samarium cobalt permanent magnets, neodymium iron boron, alnico permanent magnets, etc.

[0044] See Figure 4 , Figure 6 The sealing block 907 is slidably disposed in the air passage 902 via a linear ball bearing-guide rail assembly. There are three sets of linear ball bearing-guide rail assemblies. One end of the guide rail of the linear ball bearing-guide rail is fixedly connected to the stepped surface 914 at the inlet of the air passage 902. The three sets of linear ball bearing-guide rails are provided to ensure that the sealing block 907 moves linearly along the axial direction of the air passage 902.

[0045] A spring 911 is fitted onto one end of the guide rail of the linear ball bearing-guide rail assembly. The spring 911 is located at the end away from the inlet of the air passage 902.

[0046] An air passage 902 is located inside a cylinder 903, and the air passage 902 is far from the center of the cylinder 903. A nozzle 901 is mounted on the cylinder 903. An airflow chamber 904 is located at one end of the cylinder 903.

[0047] See Figure 2 One end of the cylinder 903 passes through the side wall of the drain chamber 7 and is connected to the second motor 913 via the gear set 912. The cylinder 903 is rotatably connected to the side wall of the drain chamber 7.

[0048] Specifically, the gear set 912 includes a first gear, which is fixedly mounted on a cylinder 903 and meshes with a second gear. The second gear is fixedly connected to the drive shaft of a second motor 913. By controlling the rotation of the second motor 913, the cylinder 903 is rotated via the gear set 912, thereby adjusting the angle of the nozzle as a whole. The angle between the nozzle axis and the vertical plane is adjusted according to the thickness of the cotton fabric to be dried, so that the angle is between 10 and 60 degrees. It should be noted that this angle tilts the nozzle in the direction of the cotton fabric movement. The thicker the cotton fabric to be dried, the smaller the angle of the nozzle should be, thereby increasing the vertical tangential airflow. Conversely, the thinner the cotton fabric, the larger the angle should be. The optimal correspondence between the thickness of the cotton fabric and the nozzle angle can be determined experimentally before mass production.

[0049] The first motor 906 is an adjustable speed motor, such as a frequency converter motor or a servo motor;

[0050] The drain chamber 7 is equipped with a speed sensor, which is used to measure the speed of the cotton fabric after it exits the squeeze roller 8. For example, the speed sensor can be a laser Doppler speed sensor (such as Polytec LSV series or Micro-Epsilon), or other types of speed sensors can be selected.

[0051] The speed sensor is electrically connected to the control unit;

[0052] The control component adjusts the rotational speed of the first motor 906 in real time based on the speed measured by the speed sensor, thereby ensuring a constant number of pulsed airflow impacts per unit length of cotton fabric as it passes under the airflow fluffing mechanism 9. The frequency δ (times / meter) of the pulsed airflow can be set according to the following formula.

[0053]

[0054] n: The number of second permanent magnets 909 on turntable 905;

[0055] N: First motor speed 906 (rpm):

[0056] v: The speed at which the cotton fabric passes under the airflow fluffing mechanism 9.

[0057] Using this utility model:

[0058] Adjust the nozzle to a suitable angle according to the thickness of the cotton fabric to be dried; after being squeezed by the extrusion roller 8, the cotton fabric moves to the airflow fluffing mechanism 9. The first motor 906 drives the turntable 905 to rotate at a constant speed. When a second permanent magnet 909 on the turntable 905 rotates to align with the first permanent magnet 908 on the sealing block 907, the strong magnetic attraction overcomes the gas pressure in the airflow cavity 904, pulling the sealing block 907 toward the step surface 914 at the entrance of the air passage 902, and forming a reliable seal by pressing the sealing ring 910, cutting off the connection between the air passage 902 and the airflow cavity 904; as the turntable 905 continues to rotate, the second permanent magnet 909 and the first permanent magnet 908 are misaligned, the magnetic attraction weakens rapidly, and the high-pressure gas in the airflow cavity 904 pushes the sealing block 907 away from the step surface 914, opening the airflow channel. High-pressure gas rushes into the air passage 902 and is ejected at high speed from the nozzle 901, impacting the moving cotton fabric below. The turntable 905 rotates continuously and drives the sealing block 907 to periodically change the connection between the air passage 902 and the airflow chamber 904, thereby forming a pulsed airflow at the nozzle 901. The pulsed airflow impacts the surface of the compressed and compacted cotton fabric and the gaps between fibers, generating vibration and local stretching, effectively breaking the tight bond between fibers, making the fabric fluffy, and significantly improving its breathability and internal porosity.

[0059] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying device for all-cotton fabric, comprising a draining chamber (7) and a drying chamber (4), wherein the draining chamber (7) is provided with a squeezing roller (8), characterized in that, At least one airflow fluffing mechanism (9) is provided directly behind the extrusion roller (8) in the draining chamber (7), and the airflow fluffing mechanism (9) includes: An airflow purging assembly includes an air passage (902) and a nozzle (901) communicating with the air passage (902), the nozzle (901) being arranged in a linear array along the axis of the air passage (902); The pulsed airflow generating component includes: An airflow chamber (904) is connected to an external high-pressure air source, and a turntable (905) is provided inside the airflow chamber (904). The turntable (905) is driven to rotate by a first motor (906) outside the airflow chamber (904). The sealing assembly includes a magnetic sealing block (907) that is slidably disposed at the inlet end of the air passage (902) to control the communication state between the air passage (902) and the airflow chamber (904); The turntable (905) drives the sealing block (907) to periodically change the connection state between the air passage (902) and the airflow chamber (904) by magnetic force.

2. The drying device for all-cotton fabric according to claim 1, characterized in that, The sealing block (907) includes a sealing block body and a sealing ring (910) provided on the sealing block body, and the sealing ring (910) is opposite to the stepped surface (914) provided at the inlet end of the air passage (902), and a first permanent magnet (908) is embedded on the sealing block body. The turntable (905) has a ring array of embedded second permanent magnets (909) on its end face. The cross-section of the second permanent magnet (909) is arc-shaped, and the forward projection of the second permanent magnet (909) can completely cover the first permanent magnet (908). The first permanent magnet (908) and the second permanent magnet (909) are magnetically attracted to each other.

3. The drying device for all-cotton fabric according to claim 2, characterized in that, The sealing block (907) is slidably disposed in the air passage (902) via a linear ball bearing-guide rail assembly, and the linear ball bearing-guide rail assembly is provided in three sets.

4. The drying device for all-cotton fabric according to claim 3, characterized in that, A spring (911) is fitted onto one end of the guide rail of the linear ball bearing-guide rail assembly, and the spring (911) is located at the end away from the inlet of the air passage (902).

5. The drying device for all-cotton fabric according to claim 1, characterized in that, The air passage (902) is located inside the cylinder (903) and is located away from the center of the cylinder (903). The nozzle (901) is mounted on the cylinder (903). The airflow chamber (904) is located at one end of the cylinder (903).

6. The drying device for all-cotton fabric according to claim 5, characterized in that, One end of the cylinder (903) passes through the side wall of the drain chamber (7) and is connected to the second motor (913) via a gear set (912). The cylinder (903) is rotatably connected to the side wall of the drain chamber (7).

7. A drying device for all-cotton fabric according to claim 6, characterized in that, The gear set (912) includes a first gear, which is fixedly mounted on the cylinder (903) and meshes with a second gear, which is fixedly connected to the drive shaft of the second motor (913).

8. The drying device for all-cotton fabric according to claim 1, characterized in that, The first motor (906) is an adjustable speed motor; The drain chamber (7) is equipped with a speed sensor, which is used to measure the speed of the cotton fabric after it exits the squeezing roller (8). The speed sensor is electrically connected to the control unit. The control unit adjusts the rotation speed of the first motor (906) in real time according to the speed measured by the speed sensor, so as to keep the number of pulse airflow impacts on the cotton fabric per unit length constant when it passes under the airflow fluffing mechanism (9).

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