A cotton web foreign fiber removal device and its spray valve assembly and nozzle plate

Abstract

This application discloses a foreign fiber removal device for cotton webs, along with its spray valve assembly and nozzle plate, relating to the field of textile machinery. The device includes a frame and a feeding conveyor belt, a foreign fiber detection component, and a spray valve assembly mounted on the frame. The feeding conveyor belt receives and transports the cotton web output from the carding machine. The spray valve assembly ejects foreign fibers from the cotton web as it is transported by the feeding conveyor belt. The spray valve assembly includes a nozzle plate, an air pipe, and a solenoid valve. The nozzle plate is elongated and has interconnected nozzle holes and air inlets, with multiple sets of nozzle holes and air inlets arranged in a one-to-one correspondence. Through the unique design of the nozzle plate and spray valve assembly, this device can precisely eject airflow to eject foreign fibers, effectively removing foreign fiber impurities from the cotton web and achieving online removal of foreign fibers from the cotton web.

Description

Technical Field

[0001] This application relates to the technical field of textile machinery and equipment, and in particular to a cotton web foreign fiber removal device and its spray valve assembly and nozzle plate. Background Technology

[0002] All-cotton spunlace nonwoven fabric, also known as pure cotton spunlace nonwoven fabric, is made from natural pure cotton fibers. The process involves opening and loosening the cotton, then using a high-precision carding machine, a web-laying machine, and a drafting machine to form a web. Under pressure, numerous needle-like water jets are formed, which cause the cotton fibers to entangle into a fabric through a spunlace machine. It is mainly used in medical and hygiene products, household hygiene products, and personal care products such as pure cotton face towels and soft towels.

[0003] The production process of all-cotton spunlace nonwoven fabric in the post-bleaching process mainly includes the following steps: material preparation, cleaning, opening, carding, debleaching, drying, opening, carding, cross-laying, multi-roller drafting, spunlace, tumble drying, drying, and finished product winding. The carding process is as follows: the pure cotton fibers after opening and loosening are further loosened into single fibers using a carding machine, and impurities (such as cottonseed hulls, short fibers, and dust) are removed from the fibers by the carding machine's needle cloth, straightening and arranging the disordered fibers into parallel lines. The carded fibers are output from the carding machine in the form of a uniform thin cotton web (usually less than 1 mm thick). At the same time, impurities such as broken seeds and short fibers left over from the cleaning process are removed during this process.

[0004] However, in actual production, due to the limitations of the carding machine's design (by combing cotton fibers and removing short fibers, broken seeds, and other cotton-derived impurities), it is difficult for the carding machine to effectively remove non-cotton foreign fiber impurities between cotton fibers. These unremoved foreign fibers enter the cross-laying and hydroentangling processes with the cotton web, easily causing product quality defects and hygiene and safety risks; moreover, once foreign fibers are mixed into the web, they are extremely difficult to separate. To effectively overcome this limitation of the carding machine, a dedicated foreign fiber removal mechanism needs to be installed at the rear end of the carding machine's cotton web outlet (before entering the cross-laying process). Utility Model Content

[0005] In view of the above-mentioned defects or improvement needs of the prior art, the purpose of this application is to provide a cotton web foreign fiber removal device and its spray valve assembly and nozzle plate to improve the problems of the prior art in the background art.

[0006] To achieve the above objectives, according to one aspect of this application, a nozzle plate is provided. The nozzle plate is elongated and has interconnected nozzle holes and air inlets. Multiple sets of nozzle holes and air inlets are provided in a one-to-one correspondence. In the multiple sets of nozzle holes and air inlets, multiple nozzle holes are arranged at equal intervals along the length direction of the nozzle plate, and multiple air inlets are evenly divided into two rows along the width direction of the nozzle plate. The two rows of air inlets are staggered along the length direction of the nozzle plate. In each row of air inlets, multiple air inlets are arranged at equal intervals along the length direction of the nozzle plate.

[0007] Furthermore, the diameter of the nozzle orifice is set to 1mm-5mm.

[0008] Furthermore, the spacing between two adjacent nozzle holes is set to 4mm-10mm.

[0009] According to another aspect of this application, based on a nozzle plate as described above, this application proposes a spray valve assembly, which includes a nozzle plate, air pipes, and solenoid valves. The air pipes are configured as multiple pipes, each corresponding to a plurality of air inlets, and the outlet end of the air pipe is connected to the inlet of the air inlet. The solenoid valves are configured as multiple valves, and the plurality of air inlets are evenly divided into multiple groups along the length direction of the nozzle plate, with each group containing at least one air inlet. Each solenoid valve is connected to a group of air inlets through an air pipe and controls the opening and closing of the air passage of that group of air inlets.

[0010] According to another aspect of this application, based on the spray valve assembly described above, this application proposes a foreign fiber removal device for cotton web, which includes a frame and a feeding conveyor belt, a foreign fiber detection assembly, and a spray valve assembly mounted on the frame. The feeding conveyor belt has a fixed impurity collection channel with openings at the top and bottom. The upper opening of the impurity collection channel is its inlet, and the lower opening is its outlet. The plane where the inlet of the impurity collection channel is located is below the conveying surface of the feeding conveyor belt. The foreign fiber detection assembly and the spray valve assembly are located above the feeding conveyor belt and the impurity collection channel, and the detection end of the foreign fiber detection assembly and the ejection end of the spray valve assembly are both arranged facing the inlet of the impurity collection channel.

[0011] Furthermore, the foreign fiber detection component includes a camera module, a light source module, an image processing module, and a light source control module. The camera module is fixedly mounted on the frame with its shooting end facing the feeding end of the feeding conveyor belt. The light source module is adjustablely rotatably mounted on the frame, and the light source illumination range of the light source module is adapted to overlap with the shooting range of the camera module.

[0012] Furthermore, a feeding pipe and a feeding fan are connected to the outlet of the impurity collection channel. The feeding fan is fixedly installed on the frame. The feeding pipe is located between the impurity collection channel and the feeding fan. The negative pressure inlet of the feeding fan is connected to the outlet of the impurity collection channel through the feeding pipe, and the positive pressure outlet is arranged downwards.

[0013] Furthermore, the cross-sectional area of ​​the impurity collection channel opening gradually decreases from top to bottom.

[0014] In summary, this application includes at least one of the following beneficial technical effects:

[0015] 1. Multiple nozzle holes are evenly distributed along the length of the nozzle plate, ensuring uniform intensity (such as impact force and coverage density) of the ejected airflow (or fluid) on the target surface. Multiple air inlets are evenly divided into two rows along the width of the nozzle plate, with the two rows staggered along the length of the nozzle plate. Compared to a single-row layout, this effectively improves processing capacity and coverage width, increasing the number of air inlets (or increasing the total air intake area) within a limited space, thereby increasing the air intake per unit time and meeting the needs of high-flow-rate operations.

[0016] 2. When the foreign fiber detection component detects and identifies foreign fibers in the cotton web, the control system can control the opening position and number of solenoid valves in the spray valve assembly according to the position of the foreign fiber detected by the foreign fiber detection component and the speed of the cotton web movement. This precisely controls the air passage opening and closing of each group of air inlets and nozzles, quickly responds and sprays out high-pressure airflow, promptly knocking the foreign fibers out of the cotton web on the feeding conveyor belt. It also enables the sprayed airflow to act more accurately on the location of the foreign fibers, avoiding spraying deviation caused by pressure fluctuations, and achieving precise striking of foreign fibers in the cotton web.

[0017] 3. The group control method of the spray valve assembly can operate simultaneously in different areas. On the one hand, for wide materials or high-speed moving cotton webs, it can effectively cover the entire detection area, greatly improving the removal efficiency of foreign fibers. On the other hand, it can flexibly adjust the control strategy and blowing parameters of the solenoid valve according to different production needs and foreign fiber distribution. Thus, for cotton webs of different widths or different transmission speeds, a good foreign fiber removal effect can be achieved by reasonably setting parameters such as grouping and blowing time, adapting to a variety of production scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the nozzle plate in Embodiment 1 of this application;

[0020] Figure 2 This is a top view of the nozzle plate in Embodiment 1 of this application;

[0021] Figure 3 yes Figure 2 Cross-sectional view of the middle nozzle plate along line AA;

[0022] Figure 4 This is a schematic diagram of the overall structure of the spray valve assembly in Embodiment 2 of this application;

[0023] Figure 5 yes Figure 4 An enlarged schematic diagram of part A in the middle;

[0024] Figure 6 This is a schematic diagram of the overall structure of the foreign fiber removal device for the cotton web in Embodiment 3 of this application;

[0025] Figure 7 This is a partial structural schematic diagram to illustrate the relationship between the components of the foreign fiber removal device in Embodiment 3 of this application;

[0026] Figure 8 This is a side view of the foreign fiber removal device for the cotton web in Embodiment 3 of this application (with some unrelated structures hidden, such as the electrical control box), when the feeding conveyor belt is located at its starting point.

[0027] Figure 9 This is a side view of the foreign fiber removal device in Embodiment 3 of this application when the feeding conveyor belt is at its conveying end point.

[0028] Reference numerals: 1. Frame; 11. Beam; 12. Support leg; 2. Feeding conveyor belt; 3. Transmission assembly; 31. First drive component; 32. Mounting bracket; 33. Second drive component; 4. Foreign fiber detection assembly; 41. Camera module; 42. Light source module; 5. Spray valve assembly; 51. Nozzle plate; 511. Nozzle hole; 512. Air inlet; 52. Air pipe; 53. Solenoid valve; 6. Impurity collection channel; 7. Feeding pipe; 8. Feeding fan. Detailed Implementation

[0029] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-9 The present application will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the application. Example

[0030] like Figure 1-3As shown, this application provides a nozzle plate 51, which is elongated and has interconnected nozzle holes 511 and air inlets 512. Multiple sets of nozzle holes 511 and air inlets 512 are provided, each corresponding to the other. In the multiple sets of nozzle holes 511 and air inlets 512, the nozzle holes 511 are arranged at equal intervals along the length of the nozzle plate 51, and the air inlets 512 are evenly divided into two rows along the width of the nozzle plate 51. The two rows of air inlets 512 are staggered along the length of the nozzle plate 51. In each row of air inlets 512, multiple air inlets 512 are arranged at equal intervals along the length of the nozzle plate 51.

[0031] Reference Figure 1 and Figure 3 On the one hand, the nozzle plate 51 is designed as a long strip, and the nozzle holes 511 are evenly spaced along the length direction, which can directly match the long strip-shaped working area (such as the surface of strip materials or sheet materials in the production line, the surface of cotton web in this embodiment). This design can avoid the "blind spot" when multiple short nozzle plates 51 are spliced ​​together, ensuring full-length coverage of the target area (such as the width direction of the material), and continuous and uninterrupted operation can be completed without additional adjustment of the nozzle plate 51 position.

[0032] On the other hand, the multiple nozzle holes 511 and the nozzle plate 51 are evenly distributed along the length direction, which can ensure that the intensity of the ejected airflow (or fluid) on the target surface (such as impact force and coverage density) is uniform. The multiple air inlets 512 are evenly divided into two rows along the width direction of the nozzle plate 51, and the two rows of air inlets 512 are staggered along the length direction of the nozzle plate 51. Compared with a single row layout, this can effectively improve the processing capacity and coverage width. By increasing the number of air inlets 512 (or increasing the total air intake area) within a limited width space, the air intake per unit time can be increased, thereby meeting the requirements of high flow rate operations.

[0033] Furthermore, refer to Figure 1 and Figure 3 Since the nozzle holes 511 and the air inlets 512 are one-to-one, each nozzle hole 511 has an independent air inlet channel, avoiding the "air competition" problem when multiple nozzles share the air inlet channel (such as a certain nozzle hole 511 getting a higher flow rate because it is closer to the air inlet, resulting in insufficient flow rate for other nozzle holes 511); this design can ensure that the working parameters of each nozzle (such as airflow speed and direction) are independently controllable, and can be adjusted individually according to actual needs (such as only maintaining the corresponding air inlet 512 when there is a partial blockage, without affecting the overall operation).

[0034] Furthermore, the diameter of the nozzle orifice 511 is preferably 1mm-5mm. Within this diameter range, the nozzle orifice 511 can more effectively match the shape of impurities such as foreign fibers, resulting in a better impact on these impurities. The diameter of the air inlet 512 is larger than that of the nozzle orifice 511, so as to accelerate and concentrate the airflow, enabling the airflow to be ejected from the nozzle orifice 511 at high speed and with precision.

[0035] Furthermore, the spacing between two adjacent nozzle holes 511 is preferably 4mm-10mm to simplify processing and assembly; at the same time, the equally spaced layout makes the force on the nozzle plate 51 more uniform (such as the fixing force during installation and the reaction force of airflow impact), reducing the risk of deformation after long-term use. Example

[0036] Reference Figure 4 and Figure 5 This application discloses a spray valve assembly, which includes a solenoid valve 53, an air pipe 52, and a nozzle plate 51 as described in Example 1.

[0037] In this embodiment, multiple air pipes 52 are configured, and the number of air inlets 512 corresponds to the number of air pipes 52. Each air pipe 52 corresponds one-to-one with a plurality of air inlets 512 on the nozzle plate 51, and the outlet end of each air pipe 52 is connected to the inlet of each air inlet 512. By independently connecting each air pipe 52 to the air inlet 512 and the solenoid valve 53, pressure fluctuations in multiple shared air paths can be avoided from affecting each other. When two adjacent solenoid valves 53 do not open simultaneously, if they share an air path, the solenoid valve 53 that opens later may experience insufficient blowing pressure due to the pressure drop of the first group to open; while independent air paths ensure that the blowing pressure of each group remains stable within ±5% of the set value.

[0038] Reference Figure 4 and Figure 5 Multiple solenoid valves 53 are provided, and multiple air inlets 512 are evenly divided into multiple groups along the length of the nozzle plate 51. Each group has at least one air inlet 512. Each solenoid valve 53 is connected to a group of air inlets 512 through an air pipe 52 and controls the air passage of that group of air inlets 512 accordingly. By dividing the air inlets 512 into multiple groups along the length of the nozzle plate 51, and each group being controlled by an independent solenoid valve 53, specific areas can be selectively activated according to actual needs. For example, when processing wide-width materials, if only some areas contain foreign fibers or impurities, only the solenoid valve 53 of the corresponding area can be opened to reduce ineffective blowing and lower energy consumption.

[0039] Furthermore, if a certain air tube or a group of air tubes 52 is blocked by a foreign object, only the group of solenoid valves 53 needs to be closed for maintenance; if a certain solenoid valve 53 is damaged, the operator can directly replace the corresponding module without disassembling the entire spray valve assembly 5, thus effectively improving the usability of the spray valve assembly 5.

[0040] It should be noted that, in this embodiment of the application, only one air tube and one solenoid valve are shown in the figure for ease of display. In reality, each air inlet corresponds to one air tube, and every two, four, or N air tubes correspond to one solenoid valve, with the value of N adapting to the actual specifications of the solenoid valve. Example

[0041] Reference Figures 6-9 This application discloses a foreign fiber removal device for cotton webs (hereinafter referred to as "this device" or "cotton web foreign fiber removal device"), which includes a frame 1 and a feeding conveyor belt 2, a transmission assembly 3, a foreign fiber detection assembly 4, a spray valve assembly 5 as described in Embodiment 2, and a control system mounted on the frame 1. The feeding conveyor belt 2 is mounted on the frame 1 via the transmission assembly 3 and is used to receive and transport the cotton web output from the carding machine. The foreign fiber detection assembly 4 and the spray valve assembly 5 are both located above the feeding conveyor belt 2. The foreign fiber detection assembly 4 is used to detect, identify, and locate foreign fibers in the cotton web on the feeding conveyor belt 2, and the spray valve assembly 5 is used to eject the detected foreign fibers from the cotton web. The feeding conveyor belt 2, the transmission assembly 3, the foreign fiber detection assembly 4, and the spray valve assembly 5 are all electrically connected to the control system. The cotton web foreign fiber removal device is located at the rear end of the carding machine and is used to remove foreign fibers from the cotton web output at the outlet, effectively removing non-cotton foreign fiber impurities from the cotton web and continuously transporting the cotton web.

[0042] Specifically, refer to Figure 6 and Figure 7 In this embodiment, the frame 1 is preferably a portal frame, which includes a horizontally arranged beam 11, two sets of support legs 12 fixed at both ends of the beam 11 for supporting the beam 11, and a number of support rods and reinforcing members disposed between the two sets of support legs 12. The support legs 12 are arranged vertically, the beam 11 is located at the top of the support legs 12, and the length direction of the beam 11 is the length direction of the frame 1, the width direction of the beam 11 is the width direction of the frame 1, and the width direction of the feeding conveyor belt 2 is parallel to the length direction of the frame 1.

[0043] A feeding conveyor belt for transporting cotton web is adaptively installed between the cotton web foreign fiber removal equipment and the carding machine according to the actual site area. The feeding conveyor belt connects the cotton web foreign fiber removal equipment and the carding machine and provides stable transmission of the cotton web. The speed at which the feeding conveyor belt transports the material is consistent with the speed at which the cotton web is output from the carding machine.

[0044] Furthermore, refer to Figure 6 and Figure 8The frame 1 is located behind the unloading end of the feeding conveyor belt, and the feeding conveyor belt 2 and the transmission assembly 3 are both located below the frame beam 11 of the frame 1. The feeding conveyor belt 2 includes a transmission belt, active and driven idlers for supporting the transmission belt and materials and adjusting the tension of the transmission belt, a drive assembly for providing power to drive the transmission belt, and a support structure for supporting the feeding conveyor belt 2. The drive assembly of the feeding conveyor belt 2 is electrically connected to the control system. The length direction of the transmission belt and the support is consistent with the width direction of the frame 1, and the width direction of the transmission belt is consistent with the length direction of the frame 1. The transmission belt transports materials along the width direction of the frame 1. The feeding conveyor belt 2 is driven and installed between the two sets of support legs 12 of the frame 1 through the transmission assembly 3. It can move up and down in the vertical direction with the transmission assembly 3 or move horizontally along the width direction of the frame 1 to stably receive the cotton web at the unloading end of the feeding conveyor belt when the cotton web foreign fiber removal equipment is started, and to effectively pull and transport the cotton web.

[0045] Furthermore, an impurity collection channel 6 with openings at the top and bottom is fixedly provided on the outer side of the feeding end of the feeding conveyor belt. The upper opening of the impurity collection channel 6 is its inlet and the lower opening is its outlet. The impurity collection channel 6 is designed to be narrow, and its opening cross-sectional area gradually decreases from top to bottom. Moreover, the plane where the inlet of the impurity collection channel 6 is located is below the conveying surface of the feeding conveyor belt 2.

[0046] Reference Figure 6 and Figure 7 The foreign fiber detection component 4 includes a camera module 41, a light source module 42, an image processing module, and a light source control module.

[0047] Specifically, the camera module 41 includes an industrial camera and a camera mounting bracket fixedly mounted on the frame beam 11 of the frame 1. In this embodiment, the industrial cameras are preferably four groups, which are equally spaced along the length of the frame beam 11 and symmetrical with respect to the center line of the frame beam 11. The industrial cameras are fixedly connected to the frame beam 11 by the camera mounting bracket, with the shooting ends of the industrial cameras arranged vertically downwards. Multiple sets of observation ports for shooting by the industrial cameras are opened through the frame beam 11, and transparent light-transmitting plates are fixedly installed at the observation ports.

[0048] The light source module 42 includes an LED light strip and a light strip mounting profile. The LED light strip is locked and fixed between the two sets of support legs 12 of the frame 1 through the light strip mounting profile, and the light source of the LED light strip shines downward. The horizontal tilt angle of the LED light strip is adjusted through the light strip mounting profile. The light source control module consists of a light source control board and related controllers. The light source control board and related controllers are connected to the light source signal of the LED light strip. The control system is bidirectionally connected to the light source control module. The control system of the cotton web foreign fiber removal equipment realizes the opening and closing of the light source of the LED light strip and the brightness adjustment through the light source control module.

[0049] In a preferred embodiment of this application, the image processing module is an embedded processing unit that carries and runs an AI deep learning inference engine (i.e., an "AI module," which includes a hardware board and software code), such as an NVIDIA Jetson Nano, NVIDIA Jetson Orin Nano, iDSP intelligent processing module, or similar modules. The AI ​​module detects foreign fibers in cotton in real time based on a deep learning model, outputs the location, type, and confidence level of the foreign fibers, and generates a removal command to the image processing module; the image processing module is directly connected to an industrial camera and communicates bidirectionally with the control system.

[0050] Furthermore, an acrylic background plate is fixedly installed on the outer side of the feed inlet of the impurity collection channel 6 for use with the camera module 41 and the light source module 42. The acrylic background plate is a rectangular plate, with its length direction consistent with the length direction of the frame 1 and its width direction consistent with the width direction of the frame 1. The acrylic background plate can be used in conjunction with LED light strips to provide the industrial camera with a clean, consistent, and non-reflective background, reducing interference from ambient light and stray light. This allows foreign fibers in the cotton web, whose color is similar to but slightly different from cotton, to be clearly highlighted, forming sufficient contrast and making it easier for the camera algorithm to identify the foreign fibers.

[0051] The control system includes a host computer and a data information interaction module. The host computer and the data information interaction module are bidirectionally connected and provide a human-machine interface. The data information interaction module is bidirectionally connected to the LED light source control module, and its output is connected to the spray valve assembly 5. The image processing module analyzes each frame of the acquired cotton web in real time based on the high-resolution image and speed information, detects and locates foreign objects, and performs preliminary logical judgments based on the recognition results of the AI ​​module (such as the type, location, and confidence level of the foreign object, whether it reaches the activation threshold of the spray valve assembly 5). It then generates a high-speed control signal to the control system. The data information interaction module can receive the detection results from the AI ​​module and trigger the spray valve assembly 5 to eject the foreign fibers.

[0052] Furthermore, operators can set parameters (such as sensitivity, cotton cleaning level, equipment start-up and shutdown) through the control system, monitor the equipment's operating status (output, fault information, foreign fiber removal rate statistics, real-time image display, etc.), view historical data, perform system configuration and maintenance, and interact with the cloud platform for global scheduling and optimization.

[0053] Furthermore, refer to Figure 6 and Figure 7 At the same time, combined Figure 4The spray valve assembly 5 includes a nozzle plate 51, an air pipe 52, and a solenoid valve 53. Both the nozzle plate 51 and the solenoid valve 53 are fixedly mounted above the feeding conveyor belt 2. The nozzle plate 51 has a nozzle hole 511, an air guide chamber, and an air inlet 512. The solenoid valve 53 is connected to the air inlet end of the air pipe 52. The air outlet end of the air pipe 52 is connected to the inlet of the air inlet 512. The outlet of the air inlet 512 is connected to the inlet of the nozzle hole 511 through the air guide chamber, and the outlet of the nozzle hole 511 faces the feed inlet of the impurity collection channel 6. By controlling the opening and closing of the solenoid valve 53, the airflow between the air inlet 512, the air guide chamber, and the nozzle hole 511 can be interrupted. Therefore, when the foreign fiber detection assembly 4 detects and identifies foreign fibers in the cotton web, the airflow is controlled to spray out from the outlet of the nozzle hole 511, thus expelling the foreign fibers from the cotton web.

[0054] When the foreign fiber detection component 4 detects and identifies foreign fibers in the cotton web, the control system can control the opening position and number of solenoid valves 53 in the spray valve component 5 according to the position of the foreign fibers detected by the foreign fiber detection component 4 and the speed of the cotton web movement. It can precisely control the air passage opening and closing of each group of air inlets 512 and nozzle holes 511, quickly respond and spray high-pressure airflow, and promptly knock the foreign fibers out of the cotton web on the feeding conveyor belt 2. It can also make the sprayed airflow more accurately act on the location of the foreign fibers, avoid spraying deviation caused by pressure fluctuations, and achieve precise strike on the foreign fibers in the cotton web. At the same time, the group control method can work simultaneously in different areas. On the one hand, for wide materials or high-speed moving cotton webs, it can effectively cover the entire detection area, greatly improving the foreign fiber removal efficiency. On the other hand, it can also flexibly adjust the control strategy and spraying parameters of the solenoid valve 53 according to different production needs and foreign fiber distribution. Thus, for cotton webs of different widths or different transmission speeds, good foreign fiber removal effect can be achieved by reasonably setting parameters such as grouping and spraying time, adapting to various production scenarios.

[0055] Furthermore, refer to Figure 6 and Figure 7 The outlet of the impurity collection channel 6 is connected to a discharge pipe 7 and a discharge fan 8. The discharge fan 8 is fixedly installed on the frame 1. The discharge pipe 7 is preferably a bendable threaded pipe, located between the impurity collection channel 6 and the discharge fan 8. The negative pressure inlet of the discharge fan 8 is connected to the outlet of the impurity collection channel 6 through the discharge pipe 7, and the positive pressure outlet is arranged downwards. When the foreign fiber detection component 4 detects foreign fibers, the discharge fan 8 can cooperate with the spray valve component 5 to provide negative pressure suction, sucking up the foreign fibers and impurity-containing cotton in the impurity collection channel 6 and the discharge pipe 7, and efficiently guiding the aforementioned foreign fibers and impurity-containing cotton away from the device.

[0056] In the operation of the foreign fiber removal device for cotton web disclosed in this application embodiment, the carding machine, the feeding conveyor belt and this device are started. The feeding conveyor belt is used to receive and transport the cotton web output from the carding machine outlet, so that the cotton web is steadily transported forward. Then, before the cotton web output from the carding machine reaches the feeding conveyor belt 2, the feeding conveyor belt 2 is driven to its starting point. The feeding conveyor belt 2 receives, pulls, and transmits the cotton web from the unloading end of the feeding conveyor belt. The transmission speed of the feeding conveyor belt 2, the transmission speed of the feeding conveyor belt, and the speed of the cotton web output from the carding machine are controlled to be consistent, so as to avoid cotton web breakage or accumulation and wrinkling problems due to changes in the load and transmission speed during the transmission process. At the same time, the feeding conveyor belt and the feeding conveyor belt 2 continuously convey the cotton web forward. The first foreign fiber detection component 4 detects, identifies, and locates foreign fibers in the cotton web. The first spray valve component 5 knocks out the detected foreign fibers. The foreign fibers and impurities are carried away from the production line through the first impurity collection channel 6, the first hose, and the first fan. This effectively removes foreign fiber impurities from the cotton web, which helps to reduce problems such as uneven web thickness and water spunlace needle hole blockage caused by foreign fibers in subsequent processes, thereby reducing product quality defects and hygiene and safety risks.

[0057] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A nozzle plate, characterized in that: The nozzle plate (51) is elongated and has interconnected nozzle holes (511) and air inlets (512). Multiple sets of nozzle holes (511) and air inlets (512) are provided in a one-to-one correspondence. In the multiple sets of nozzle holes (511) and air inlets (512), the multiple nozzle holes (511) are arranged at equal intervals along the length direction of the nozzle plate (51), and the multiple air inlets (512) are evenly divided into two rows along the width direction of the nozzle plate (51). The two rows of air inlets (512) are staggered along the length direction of the nozzle plate (51). In each row of air inlets (512), the multiple air inlets (512) are arranged at equal intervals along the length direction of the nozzle plate (51).

2. A nozzle plate according to claim 1, characterized in that: The diameter of the nozzle orifice (511) is set to 1mm-5mm.

3. A nozzle plate according to claim 2, characterized in that: The spacing between two adjacent nozzle holes (511) is set to 4mm-10mm.

4. A spray valve assembly, based on the nozzle plate according to any one of claims 1-3, characterized in that: The system includes a nozzle plate (51), air pipes (52), and solenoid valves (53). The air pipes (52) are configured as multiple pipes, each corresponding to a plurality of air inlets (512). The outlet of each air pipe (52) is connected to the inlet of each air inlet (512). The solenoid valves (53) are configured as multiple valves. The multiple air inlets (512) are evenly divided into multiple groups along the length of the nozzle plate (51). Each group of air inlets (512) has at least one air inlet. Each solenoid valve (53) is connected to a group of air inlets (512) through the air pipes (52) and controls the air passage of that group of air inlets (512).

5. A cotton web foreign fiber removal device, based on the spray valve assembly of claim 4, characterized in that: Includes a frame (1) and a feeding conveyor belt (2), a foreign fiber detection component (4) and a spray valve component (5) mounted on the frame (1). The feeding conveyor belt (2) is fixedly provided with an impurity collection channel (6) with openings at the top and bottom. The upper opening of the impurity collection channel (6) is its inlet and the lower opening is its outlet. The plane where the inlet of the impurity collection channel (6) is located is below the conveying surface of the feeding conveyor belt (2). The foreign fiber detection component (4) and the spray valve component (5) are located above the feeding conveyor belt (2) and the impurity collection channel (6), and the detection end of the foreign fiber detection component (4) and the ejection end of the spray valve component (5) are both arranged facing the feed inlet of the impurity collection channel (6).

6. The foreign fiber removal device for cotton web according to claim 5, characterized in that: The foreign fiber detection component (4) includes a camera module (41), a light source module (42), an image processing module, and a light source control module. The camera module (41) is fixedly installed on the frame (1) and the shooting end of the camera module (41) is arranged facing the feeding end of the feeding conveyor belt (2). The light source module (42) is adjustablely rotatably installed on the frame (1), and the light source illumination range of the light source module (42) is suitable to overlap with the shooting range of the camera module (41).

7. The foreign fiber removal device for cotton web according to claim 5, characterized in that: The discharge port of the impurity collection channel (6) is connected to a discharge pipe (7) and a discharge fan (8). The discharge fan (8) is fixedly installed on the frame (1). The discharge pipe (7) is located between the impurity collection channel (6) and the discharge fan (8). The negative pressure inlet of the discharge fan (8) is connected to the discharge port of the impurity collection channel (6) through the discharge pipe (7), and the positive pressure discharge port is arranged downwards.

8. The foreign fiber removal device for cotton web according to claim 7, characterized in that: The cross-sectional area of ​​the opening of the impurity collection channel (6) gradually decreases from top to bottom.

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