Anti-backflushing nozzle structure of cloth dyeing machine

Abstract

The utility model relates to the technical field of dyeing machines, in particular to an anti-backflushing nozzle structure of a cloth dyeing machine, which comprises a spray head and a core seat, the spray head is arranged in an inner cavity of the core seat, and two ends of the core seat are respectively and fixedly connected with a machine head part of the cloth dyeing machine by arranging connecting flanges. A flow guide cavity is formed between the inner wall of the core seat and the outer wall of the spray head, a flange plate used for inputting dye liquor is arranged on the outer side wall of the core seat, a water inlet is formed in the flange plate, the water inlet is perpendicular to the core seat, and the water inlet is communicated with the flow guide cavity; and a flow guide assembly is arranged in the flow guide cavity. According to the utility model, the guide plate is arranged between the guide cavity and the water inlet to guide and distribute the dye liquor, so that the impact force of water flow can be effectively decomposed, the phenomenon of backflushing or backflow of the dye liquor is avoided, and the dye liquor is ensured to be stably sprayed on fabrics according to a normal direction.

Description

Technical Field

[0001] This utility model relates to the field of dyeing machine technology, and in particular to a nozzle structure for preventing backlash in a fabric dyeing machine. Background Technology

[0002] In the textile industry, dyeing machines are generally used to dye fabrics, giving them different colors. The nozzle is one of the main components of the dyeing machine; the nozzle sprays dye liquor, which is one of the main driving forces for conveying the fabric. The fabric enters the nozzle through the fabric inlet, and the dye liquor enters the nozzle through the solution inlet, then is sprayed out from the nozzle gaps to dye the fabric. Under the impact of the dye liquor, the fabric enters the fabric-laying mechanism, achieving fabric-liquid separation. It is then lifted back to the nozzle by the fabric lifting device, circulating within the dyeing machine. The separated dye liquor flows back to the collection tank, is then pumped back into the nozzle, achieving cyclic dyeing.

[0003] However, in existing dyeing machines with built-in nozzles, due to the vertical positioning of the water inlet and nozzle, some dye liquor does not flow onto the fabric in the normal direction after being sprayed out of the nozzle, but instead flows in the opposite direction. Furthermore, unreasonable nozzle shape, size, or angle design may lead to uneven dye liquor spraying, resulting in backflow. In addition, unstable pressure in the dyeing machine's supply system, such as excessively high or low pressure, will affect the normal spraying of dye liquor. When the pressure suddenly increases, the dye liquor may generate a reaction force due to excessive spraying speed, causing some dye liquor to backflow. Conversely, when the pressure is too low, the dye liquor cannot be fully sprayed out, which may also form backflow at the nozzle. These problems not only reduce the quality of dyed fabric but also increase the defect rate in the production process, and urgently need to be solved. Utility Model Content

[0004] In order to address the technical deficiencies mentioned in the background art, the purpose of this utility model is to provide a nozzle structure for preventing backflow in a dyeing machine, so as to solve the problems of backflow, uneven spraying and reflux of dye liquor caused by the inlet and nozzle setting method, self-design and unstable pressure of the liquid supply system in the existing built-in nozzles of dyeing machines mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A nozzle structure for preventing backflow in a fabric dyeing machine includes a nozzle and a core seat. The nozzle is built into the inner cavity of the core seat. Both ends of the core seat are fixedly connected to the head section of the fabric dyeing machine via connecting flanges. A flow guide cavity is formed between the inner wall of the core seat and the outer wall of the nozzle. A flange for inputting dye liquor is provided on the outer wall of the core seat. A water inlet is opened in the flange, which is perpendicular to the core seat and communicates with the flow guide cavity. A flow guide assembly is provided in the flow guide cavity. The flow guide assembly includes a flow guide plate and a connector. The flow guide plate is a rectangular plate structure and is vertically parallel between the nozzle and the water inlet. Multiple flow guide holes are equidistantly opened on the flow guide plate, and the multiple flow guide holes are respectively connected to the water inlet and the flow guide cavity. The connector is arranged around the perimeter of the flow guide plate and is fixedly connected to the inner side wall of the core seat.

[0007] Preferably, the guide hole located in the middle of the guide plate is a straight cylindrical hole structure, and the other guide holes located on both sides of the edge of the guide plate are obliquely arranged towards the middle position.

[0008] Preferably, the connector is an L-shaped sheet metal part, and both ends of the connector are fixed between the guide plate and the core seat by welding.

[0009] Preferably, the nozzle is a hollow tube with a fabric channel inside. The cross-section of the fabric channel is a circular channel adapted to the width of the fabric, and the inner wall of the fabric channel is provided with an upper dyeing liquid outlet and a lower dyeing liquid outlet facing the upper and lower surfaces of the fabric.

[0010] Preferably, the upper end of the nozzle is a fabric inlet and the lower end is a fabric outlet. The nozzle gradually expands outward toward the fabric outlet, and the fabric outlet has a pipe wall that bulges radially inward and forms an annular stop flange. The nozzle gradually expands outward toward the fabric inlet, and the fabric inlet has a pipe wall that bulges radially outward and forms an annular guide flange.

[0011] Preferably, multiple arc-shaped grooves are formed on the side wall of the stop flange near the fabric outlet end, and the arc-shaped grooves and the guide cavity form a multi-stage dye liquor nozzle.

[0012] Preferably, the guide flange extends radially outward from the inlet section of the inlet near the inlet, and has a guide slope that is concave and inclined towards the inlet direction. The guide slope is annular and forms a plurality of spaced-apart drainage grooves.

[0013] Preferably, an adjustment ring is provided on the inner wall of the core seat at the position corresponding to the guide flange. The opening of the adjustment ring is in the shape of a trumpet, and the adjustment ring is adapted to the nozzle.

[0014] In summary, the beneficial effects of this utility model are as follows:

[0015] The nozzle structure of this invention can guide and divert the dye liquor by using a guide plate with different structures on the guide plate between the nozzle and the water inlet, even when the pressure of the dyeing machine's liquid supply system is unstable. This effectively decomposes the impact force of the water flow, preventing backflow or reflux of the dye liquor and ensuring that the dye liquor is sprayed onto the fabric in the normal direction. At the same time, the streamlined design of the fabric channel inside the nozzle reduces the resistance to the flow of the dye liquor, ensuring that the dye liquor is sprayed evenly onto the fabric, greatly improving the quality of the dyed fabric and reducing defective products caused by uneven dye liquor spraying. This improves the adaptability and stability of the dyeing machine under different working conditions. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-backflow nozzle structure of the dyeing machine of this utility model;

[0017] Figure 2 This is a front view of the anti-backflow nozzle structure of the dyeing machine of this utility model;

[0018] Figure 3 yes Figure 2 A cross-sectional view of the AA plane;

[0019] Figure 4 yes Figure 2 A cross-sectional view of the BB plane.

[0020] Explanation of the reference numerals in the figure:

[0021] 1. Nozzle; 11. Fabric inlet; 12. Fabric outlet; 13. Stop flange; 131. Circular arc groove; 14. Guide flange; 141. Guide slope; 142. Drainage groove; 2. Core seat; 3. Guide cavity; 4. Flange; 41. Water inlet; 5. Guide assembly; 51. Guide plate; 511. Guide hole; 52. Connector; 6. Fabric channel; 7. Upper dye liquor outlet; 8. Lower dye liquor outlet; 9. Adjusting ring. Detailed Implementation

[0022] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0023] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0024] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0025] The following is in conjunction with the appendix Figure 1-4 The present invention provides a more detailed description of an embodiment of a nozzle structure for preventing backlash in a dyeing machine.

[0026] A nozzle structure for preventing backflow in a dyeing machine includes a nozzle 1 and a core seat 2. The nozzle 1 is built into the inner cavity of the core seat 2. The two ends of the core seat 2 are fixedly connected to the head part of the dyeing machine through connecting flanges. A flow guide cavity 3 is formed between the inner wall of the core seat 2 and the outer wall of the nozzle 1. A flange 4 for inputting dye liquor is provided on the outer wall of the core seat 2. A water inlet 41 is opened in the flange 4. The water inlet 41 is perpendicular to the core seat 2 and is connected to the flow guide cavity 3. A flow guiding assembly 5 is installed within the flow guiding cavity 3. The flow guiding assembly 5 includes a flow guiding plate 51 and a connector 52. The flow guiding plate 51 is a rectangular plate structure and is vertically and parallel to the nozzle 1 and the water inlet 41. Multiple flow guiding holes 511 are equidistantly opened on the flow guiding plate 51, and these holes connect the water inlet 41 and the flow guiding cavity 3 respectively. The connector 52 is arranged around the perimeter of the flow guiding plate 51 and is fixedly connected to the inner wall of the core seat 2. The flow guiding hole 511 located in the middle of the flow guiding plate 51 is a straight cylindrical hole structure, while the other flow guiding holes 511 located on both sides of the edge of the flow guiding plate 51 are angled towards the middle position. The connector 52 is an L-shaped sheet metal part, and its two ends are fixedly welded between the flow guiding plate 51 and the core seat 2 respectively.

[0027] Specifically, the core seat 2 is connected to the head section of the dyeing machine via connecting flanges at both ends. Suitable bolts, nuts, and other connecting parts 52 are used to ensure a secure connection. Sealant is applied or sealing rings are installed at the connection points to prevent dye leakage. During bolt tightening, the bolts should be tightened gradually in a diagonal pattern to ensure uniformity and sealing. When installing the flow guide assembly 5 into the core seat 2, the flow guide plate 51 must first be fixed to the flow guide cavity 3 of the core seat 2 via connecting parts 52. First, one end of the L-shaped sheet metal piece is welded to the edge of the flow guide plate 51, ensuring a secure weld with uniform seams and no cracks. Then, the flow guide plate 51 with the connecting parts 52 welded is placed into the flow guide cavity 3 of the core seat 2, ensuring that the flow guide plate 51 is vertically parallel to the nozzle 1 and the inlet 41, and that the flow guide holes 511 on the flow guide plate 51 are accurately positioned to effectively connect the inlet 41 and the flow guide cavity 3. Next, weld the other end of connector 52 to the inner wall of core seat 2, ensuring welding quality. Then, carefully insert nozzle 1 into the inner cavity of core seat 2, forming a flow guide cavity 3 between the outer wall of nozzle 1 and the inner wall of core seat 2. During placement, avoid collisions between nozzle 1 and core seat 2 to prevent damage. Simultaneously, check the orientation of the inlet 11 and outlet 12 of nozzle 1 to ensure smooth fabric passage. Next, install an adjusting ring on the inner wall of core seat 2 corresponding to the flow guide flange 14. The adjusting ring has a funnel-shaped opening that matches nozzle 1. After accurately installing the adjusting ring, check the uniformity of the gap between it and nozzle 1. Adjust as needed to ensure the stability of the dye liquor during flow. Finally, connect the dye liquor inlet pipe to the flange 4 on the outer wall of core seat 2. Ensure a tight connection and use sealing material to prevent dye liquor leakage. After the connection is completed, a comprehensive inspection of the entire installation structure is carried out to ensure that all components are firmly installed, tightly connected, and free from loosening, leakage, or other problems.

[0028] In this embodiment, as Figure 2 As shown, the nozzle 1 is a hollow tube and has a fabric channel 6 inside. The cross-section of the fabric channel 6 is a circular channel adapted to the width of the fabric, and the inner wall of the fabric channel 6 is provided with an upper dyeing liquid outlet 7 and a lower dyeing liquid outlet 8 facing the upper and lower surfaces of the fabric.

[0029] Specifically, by setting up a guide plate 51 within the circular fabric channel 6, the impact force of the dye liquor is effectively decomposed, avoiding backflow or reverse flow caused by uneven water flow. After being treated by the guide plate 51, the dye liquor enters the fabric channel 6 within the nozzle 1 through the guide cavity 3. Due to the streamlined design of the internal flow channel of the nozzle and the reasonable spray angle and opening size, the dye liquor can be sprayed onto the fabric evenly and stably, greatly improving the quality and effect of dyeing.

[0030] In this embodiment, as Figure 2As shown, the upper end of the nozzle 1 is the inlet 11 and the lower end is the outlet 12. The nozzle 1 gradually expands outward toward the outlet 12, and the outlet 12 has a pipe wall with a radially inward protruding and annular stop flange 13. The nozzle 1 gradually expands outward toward the inlet 11, and the inlet 11 has a pipe wall with a radially outward concave and annular guide flange 14.

[0031] Specifically, multiple arc-shaped through grooves 131 are opened on the side wall of the stop flange 13 near the end of the fabric outlet 12. The arc-shaped through grooves 131 and the guide cavity 3 form a multi-stage dye liquor nozzle. The guide flange 14 extends radially outward from the inlet section of the fabric inlet 11 near the inlet and has a guide slope 141 that is concave and inclined towards the inlet direction. The guide slope 141 is annular and forms multiple drainage grooves 142 that are spaced apart from each other.

[0032] Specifically, under the action of the guide plate 51, the impact force of the dye liquor is effectively decomposed, avoiding backflow or reflux caused by uneven water flow impact. After being treated by the guide plate 51, the dye liquor enters the fabric channel 6 inside the nozzle 1 through the guide cavity 3. The fabric channel 6 between the inlet 11 and outlet 12 at both ends of the nozzle 1 is designed as a streamlined type. At the same time, the opening size and spray angle between the guide flange 14 and the stop flange 13 and the core seat 2 are matched, so that the dye liquor can be sprayed onto the fabric evenly and stably, which greatly improves the quality and effect of dyeing the fabric.

[0033] It is worth noting that during the operation of the dyeing machine, it is necessary to closely observe the spraying of the dye liquor, the dyeing effect on the fabric, and the operating status of the equipment. The dye liquor should be monitored through the observation window or sensors to ensure it is sprayed evenly onto the fabric and to check for backflow or other abnormalities. If uneven spraying or other abnormalities are found, adjustments can be made according to the actual situation. For example, if unstable dye liquor pressure leads to poor dyeing results, the pressure regulating valve of the dyeing machine's supply system can be adjusted to maintain the pressure within a suitable range. Simultaneously, the adjusting ring 9, located on the inner wall of the core seat 2 corresponding to the guide flange 14, can be adjusted. This adjusting ring has a funnel-shaped opening and is adapted to the nozzle 1. By adjusting the installation position of the adjusting ring, the flow state of the dye liquor between the nozzle 1 and the core seat 2 can be optimized, ensuring that the dye liquor is sprayed stably and evenly onto the fabric.

[0034] It is worth noting that for lightweight fabrics such as silk and tulle, due to their soft texture and fine fibers, the requirements for the spray pressure and uniformity of the dye liquor are relatively high. This nozzle structure, through precisely designed guide holes 511 and streamlined fabric channels 6, allows the dye liquor to be sprayed onto the fabric in a gentle and uniform manner, avoiding damage to the fabric fibers due to excessive dye liquor impact. This ensures that lightweight fabrics, after dyeing, have vibrant colors and a soft texture, meeting the stringent dyeing quality requirements of high-end apparel fabrics. For heavier fabrics such as denim and canvas, a stronger dye liquor impact is needed to ensure sufficient penetration of the dye into the fabric. The multi-stage dye liquor nozzle structure and unique guide design of this nozzle structure provide sufficient spray pressure while ensuring dye liquor uniformity, allowing the dye liquor to penetrate deep into the fiber gaps of heavy fabrics, achieving uniform dyeing and high color fastness, meeting the needs of such fabrics in industrial production and daily use.

[0035] Furthermore, for fabrics with special functions such as waterproofing, antibacterial properties, and UV protection, the dyeing process must not only ensure uniform color but also prevent any impact on the fabric's original functionality. The nozzle structure in this invention, through stable dye spraying and uniform dyeing, minimizes damage to the special treatment layers of functional fabrics during the dyeing process, ensuring that the fabric retains its original functionality after dyeing, thus expanding its application in the production of functional textile products.

[0036] The working principle of this utility model;

[0037] During the dyeing process of the fabric dyeing machine, the power supply and control system of the fabric dyeing machine are turned on, and the pump is started so that the dye liquor is lifted from the water collection tank and enters the guide cavity 3 through the water inlet 41 of the flange 4. When the dye liquor or water is input into the guide cavity 3 through the water inlet 41, it first impacts the guide plate 51. At this time, the guide holes 511 on the guide plate 51 begin to play their role. The straight cylindrical hole structure in the middle guides part of the dye liquor to flow vertically downward and stably, while the inclined guide holes 511 on both sides guide the remaining dye liquor to the middle at a certain angle, so that the dye liquor converges and merges with each other when it flows out of the guide plate 51, forming a stable and concentrated dye liquor flow. Then, the fabric to be dyed is fed in from the fabric inlet 11 of the nozzle 1. When the fabric passes through the fabric channel 6 inside the nozzle 1, the upper dye liquor outlet 7 and the lower dye liquor outlet 8 set in the inner wall of the channel spray the dye liquor onto the upper and lower surfaces of the fabric at the same time, so as to achieve uniform dyeing of the fabric. Because the fabric channel 6 adopts a streamlined design, the resistance to the flow of dye liquor is reduced, allowing the dye liquor to cover the fabric more evenly. At the same time, the stop flange 13 and the arc groove 131 at the fabric outlet 12 of the nozzle 1 form a multi-stage dye liquor nozzle, further enhancing the impact of the dye liquor on the fabric and the dyeing effect. The guide flange 14 at the fabric inlet 11, its guide slope 141 and the drainage groove 142 can guide the fabric smoothly into the nozzle 1 and further guide the dye liquor.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A nozzle structure for preventing backlash in a fabric dyeing machine, comprising a nozzle and a core seat, wherein the nozzle is built into the inner cavity of the core seat, and both ends of the core seat are fixedly connected to the head portion of the fabric dyeing machine via connecting flanges, characterized in that... A flow guiding cavity is formed between the inner wall of the core seat and the outer wall of the nozzle. A flange for inputting dye solution is provided on the outer wall of the core seat. A water inlet is opened in the flange, which is perpendicular to the core seat and connected to the flow guiding cavity. A flow guiding assembly is provided in the flow guiding cavity. The flow guiding assembly includes a flow guiding plate and a connector. The flow guiding plate is a rectangular plate structure and is vertically parallel between the nozzle and the water inlet. Multiple flow guiding holes are equidistantly opened on the flow guiding plate, and the multiple flow guiding holes are respectively connected to the water inlet and the flow guiding cavity. The connector is arranged around the four edges of the flow guiding plate and is fixedly connected to the inner side wall of the core seat.

2. The anti-backflow nozzle structure for a dyeing machine according to claim 1, characterized in that, The guide hole located in the middle of the guide plate has a straight cylindrical structure, while the other guide holes located on both sides of the edge of the guide plate are obliquely arranged towards the middle position.

3. The anti-backflow nozzle structure for a dyeing machine according to claim 2, characterized in that, The connector is an L-shaped sheet metal part, and its two ends are fixed between the guide plate and the core seat by welding.

4. The anti-backflow nozzle structure for a dyeing machine according to claim 1, characterized in that, The nozzle is a hollow tube with a fabric channel inside. The cross-section of the fabric channel is a circular channel adapted to the width of the fabric, and the inner wall of the fabric channel is provided with an upper dyeing liquid outlet and a lower dyeing liquid outlet facing the upper and lower surfaces of the fabric.

5. The anti-backflow nozzle structure for a dyeing machine according to claim 4, characterized in that, The upper end of the nozzle is the inlet and the lower end is the outlet. The nozzle gradually expands outward toward the outlet, and the outlet has a pipe wall that bulges radially inward and forms an annular stop flange. The nozzle gradually expands outward toward the inlet, and the inlet has a pipe wall that bulges radially outward and forms an annular guide flange.

6. The anti-backflow nozzle structure for a dyeing machine according to claim 5, characterized in that, Multiple arc-shaped grooves are formed on the side wall of the stop flange near the fabric outlet end, and the arc-shaped grooves and the guide cavity form a multi-stage dye liquor nozzle.

7. The anti-backflow nozzle structure for a dyeing machine according to claim 5, characterized in that, The flow guide flange extends radially outward from the inlet section near the inlet and has a flow guide slope that is concave and inclined towards the inlet. The flow guide slope is annular and forms multiple spaced-apart drainage grooves.

8. The anti-backflow nozzle structure for a dyeing machine according to claim 6, characterized in that, An adjustment ring is provided on the inner wall of the core seat at the position corresponding to the flow guide flange. The opening of the adjustment ring is in the shape of a trumpet and is adapted to the nozzle.

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