A double-layer sealing ring and nozzle assembly for spinning

Abstract

This invention relates to the field of spinning assembly technology, specifically disclosing a double-layer sealing ring and a nozzle assembly for spinning. The double-layer sealing ring includes an upper sealing ring, a lower sealing ring, and a sleeve fixedly connected between the upper and lower sealing rings. The upper sealing ring, lower sealing ring, and sleeve form an installation cavity. The nozzle assembly includes the double-layer sealing ring. A support distribution net, several filter cloths, and a metal pressure ring of matching dimensions are installed within the installation cavity of the double-layer sealing ring. The filter cloths are located between the support distribution net and the metal pressure ring, and the dimensions of the filter cloths, support distribution net, and metal pressure ring stacked together match the dimensions of the installation cavity. The technical solution provided by this invention solves the problem that existing technologies still require the sequential installation of multiple independent parts on-site, resulting in long installation times for individual spinning machine spinnerets, which in turn significantly increases the overall time required for batch installation of spinnerets, severely impacting spinning efficiency.

Description

Technical Field

[0001] This invention relates to the field of spinning component technology, specifically to a double-layer sealing ring and nozzle assembly for spinning. Background Technology

[0002] Spinning, also known as chemical fiber forming, is a process in the manufacture of chemical fibers. It involves preparing certain polymer compounds into a colloidal solution or melting them into a melt, then using a metering pump to deliver the solution or melt to a spinneret, where it is extruded through the fine orifices to form chemical fibers. Spinning is mainly divided into two categories: solution spinning and melt spinning.

[0003] Solution spinning involves dissolving a fiber-forming polymer in a solvent to prepare a spinning solution of suitable concentration. This solution is then extruded through micro-holes into a coagulation bath or hot gas environment, where the polymer precipitates into solid filaments. After stretching, setting, washing, and drying, the finished fiber is obtained. Currently, solution spinning includes wet spinning, dry spinning, and wet-dry spinning. Wet spinning, also known as wet spinning, is a chemical fiber spinning method where the fiber-forming polymer is dissolved in a solvent, extruded through spinnerets, and fed into a coagulation bath to form fibers. Fiber-forming polymers suitable for wet spinning have decomposition temperatures below their melting points or are prone to discoloration upon heating, and are soluble in suitable solvents. The main process flow of wet spinning is: preparing the spinning solution – extruding the solution through spinnerets to form a fine stream – solidifying the solution stream into nascent fibers – packaging the nascent fibers or directly performing post-processing.

[0004] In wet spinning, either a vertical or horizontal spinning machine can be selected based on the density of the spinning solution and the coagulation bath. For example, when the density of the spinning solution is less than that of the coagulation bath, a vertical spinning machine can be used. The spinneret is positioned at the bottom of the coagulation bath. After the spinning solution is sprayed into the coagulation bath from the spinneret, the density difference between the spinning solution and the coagulation bath causes the spinning solution to float in the coagulation bath. This facilitates the upward movement of the spinning solution and its coagulation into nascent fibers. The nascent fibers are then wound up at the surface of the coagulation bath or directly subjected to post-processing.

[0005] Spinning assemblies typically consist of multiple parts, including a spinneret, gaskets, a spinneret plate, filter cloth, and a distribution plate. When installing the spinning assembly, the spinneret plate, gaskets, filter cloth, and distribution plate must be inserted into the spinneret in sequence and overlapped neatly. Then, the spinneret is connected to the bell-shaped base. The entire installation process is time-consuming. Furthermore, during the installation of the spinneret assembly in a vertical spinning machine, because the bell-shaped base is vertically oriented, the spinneret must be inverted and placed on the base for connection. However, during this inverted installation process, the gaskets, filter cloth, and other parts pre-installed in the spinneret are prone to loosening and displacement. Additionally, during the tightening of the spinneret's threads relative to the bell-shaped base, the gaskets, filter cloth, and other parts are also prone to displacement and misalignment. Therefore, the airtightness of the spinning assembly after installation is difficult to guarantee, leading to problems such as leakage and poor filtration of the spinning solution during spinning, severely affecting the normal operation of the spinning process.

[0006] To address the issues of time-consuming installation and poor sealing in spinneret assembly installation, utility model patent CN204251775U discloses an embedded spinning assembly, including a spinneret plate, a spiral head, a distribution plate, a multi-layer combined filter screen, a spinneret head jacket, a gasket, and a spinneret head. The spinneret plate, distribution plate, gasket, and multi-layer combined filter screen are located within an embedded groove in the spinneret head, and the spiral head and spinneret head are detachably and sealed together. This technical solution, by setting an embedded groove within the spinneret head, allows for direct placement of components such as the spinneret plate and distribution plate into the embedded groove, eliminating the need for neatly overlapping these components and shortening installation time. Furthermore, during the connection between the spiral head and the spinneret head, the embedded groove's limiting effect reduces the likelihood of displacement or misalignment of components such as the distribution plate compared to traditional installation methods.

[0007] However, the aforementioned existing technologies still have the following drawbacks:

[0008] 1. On-site installation requires sequentially placing components such as the spinneret, distribution plate, gaskets, and multi-layer combined filter screen into the embedded groove of the spinneret, and then connecting the spiral head to the spinneret to secure these components. This entire installation process is time-consuming, hindering efforts to further shorten the on-site installation time of the spinneret assembly. Furthermore, in actual wet spinning production, dozens or even hundreds of spinneret assemblies on the production line typically need to be replaced and installed at regular intervals. Therefore, the time-consuming installation of each spinneret assembly significantly increases the total installation time, and prolonged downtime of the spinning machine severely impacts the efficiency of the spinning operation.

[0009] 2. In the prior art, after the spinneret and other parts are placed into the embedded groove of the spinneret in sequence, during the process of connecting the spiral head and the spinneret, since the spinneret and other parts are not fixed relative to the embedded groove, the operator needs to manually press and fix the spinneret and other parts in the embedded groove to prevent the spinneret and other parts from being displaced or misaligned during the connection of the spiral head and the spinneret. Manual pressing is not only inconvenient to operate, but also cannot guarantee the stability of pressing. Summary of the Invention

[0010] The present invention aims to provide a double-layer sealing ring and a nozzle assembly for spinning, in order to solve the technical problem that the existing technology still requires the sequential installation of multiple independent parts on site, which leads to a long installation time for the spinneret assembly of a single spinning machine, and thus a significant increase in the overall time for batch installation of spinnerets, seriously affecting spinning efficiency.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A double-layer sealing ring for spinning includes a sealing ring body made of flexible material. The sealing ring body includes an upper sealing ring, a lower sealing ring, and a sleeve located between the upper and lower sealing rings. One end of the sleeve is fixedly connected to the upper sealing ring, and the other end of the sleeve is fixedly connected to the lower sealing ring. The upper sealing ring, the lower sealing ring, and the sleeve form an installation cavity. The installation cavity is used to install parts such as filter cloth and distribution plate, and the size of the installation cavity matches the size of all parts stacked together.

[0013] The principles and advantages of this scheme are:

[0014] In practical applications, after a period of use, components such as the filter cloth and mounting plate need to be removed from the spinneret and replaced with new parts for spinning operations to ensure smooth operation. Therefore, before disassembling the old parts and replacing them with new ones, the new parts are first installed in the mounting cavity of the sealing ring body. Specifically, the filter cloth, distribution plate, and other components are stacked together in sequence, and then the neatly stacked parts are inserted into the mounting cavity of the sealing ring body from the middle of the upper or lower sealing ring to connect the parts to the sealing ring body. When it is necessary to replace the parts inside the spinneret, simply remove the old parts from the spinneret, install the sealing ring body with the new parts installed into the spinneret cap, and connect the spinneret cap and the machine base. After the spinneret cap and the machine base are connected, the spinneret cap presses the sealing ring body firmly against the machine base.

[0015] 1. During the operation of the parts inside the spinneret, another batch of parts is installed into the mounting cavity of the sealing ring body according to the above steps. The sealing ring body fixes multiple parts into one piece. When the parts that have been used for a period of time are removed from the spinneret to replace another batch of parts, the sealing ring body with the parts installed can be directly installed into the spinneret cap, and then the spinneret cap can be reconnected to the trumpet-shaped base. Compared with installing the new parts into the spinneret cap one by one in sequence and stacking them neatly, this solution can significantly shorten the parts installation time of a single spinning machine, thereby significantly shortening the parts replacement time of the entire spinning machine, that is, effectively shortening the downtime of the entire spinning machine, so as to ensure spinning efficiency and increase spinning output.

[0016] 2. Since the dimensions of the mounting cavity match the dimensions of all parts stacked together, after the neatly stacked parts are installed into the mounting cavity, the stacked parts will contact the inner wall of the sealing ring body and be positioned by the sealing ring body. Therefore, after the parts are installed into the spinneret along with the sealing ring body, during the process of inverting the spinneret onto the machine base and tightly connecting the spinneret to the machine base by threads, there will be no relative displacement between the parts. This ensures that the parts inside the sealing ring body can effectively filter and distribute the raw liquid during the spinning process, thereby ensuring the smooth progress of the spinning operation.

[0017] 3. Connect the upper and lower sealing rings together using a sleeve, and install the part into the mounting cavity enclosed by the upper and lower sealing rings and the sleeve. At this point, the sealing ring body and the part are connected as one unit, and the sealing ring body always wraps around the edge of the part. The part and the sealing ring body will not undergo relative displacement during installation, meaning that the sealing ring body is always between the part and the spinneret. After installation, the sealing ring body is still between the part and the machine base. Therefore, the sealing ring body can ensure the sealing between the part and the spinneret and the machine base, avoiding leakage problems during spinning operations, without the need to use separate sealing rings, further simplifying the installation steps.

[0018] 4. This solution uses an integrated sealing ring body to fix multiple parts together, which shortens the installation time, ensures smooth spinning operation, and avoids leakage during spinning. The original spinneret can be used for installation without the need for adaptive modifications. Compared with the existing technology that designs and uses spinnerets with new structures, this solution avoids the waste of the original spinneret and is more conducive to saving resources and controlling costs.

[0019] 5. The sealing ring body is made of flexible material, meaning it can undergo elastic deformation. This not only facilitates the placement of neatly stacked parts into the mounting cavity of the sealing ring body for securing multiple parts, but also creates a seal between the parts and the spinneret after installation, preventing leakage during spinning. Furthermore, parts removed from the spinneret after a period of use can be taken out of the sealing ring body, cleaned, and reinstalled for continued use, avoiding resource waste and helping to control production costs.

[0020] In fact, before proposing this solution, the applicant had used aluminum alloy and other metal materials to press various parts of the spinning assembly together by machine, with the aluminum alloy forming an edging to fix the parts. However, this solution only facilitated the installation of new parts into the spinneret, but did not allow the removal of old parts from the edging. In other words, parts edged with aluminum alloy and other metal materials could only be used once, resulting in a significant waste of resources. To save resources and control production costs, the applicant improved the metal edging by designing one end of the metal edging as open and making the upper and lower ends of the metal edging detachable, thus enabling the recycling of old parts. However, the above methods are not only structurally complex and difficult to manufacture, but also still require a separate sealing ring between the metal edging, the spinneret, and the machine base to ensure the sealing of the spinning process. From an installation perspective, it is still not convenient or quick enough. Later, the applicant abandoned the structural improvement and reverted to the original metal edging structure, attempting to improve the material by using a flexible sealing ring body to replace the rigid metal edging. They found that this not only achieved the goal of fixing parts to improve installation convenience, but also allowed the flexible sealing ring body to directly seal the parts, spinneret cap, and machine base, achieving unexpectedly good results.

[0021] Preferably, as an improvement, the sealing ring body is made of one of the following materials: silicone rubber, EPDM rubber, and nitrile rubber.

[0022] Using this solution, silicone rubber, EPDM rubber, and nitrile rubber, in addition to their flexibility, also possess excellent heat resistance and oil resistance. This ensures that the sealing ring body maintains its original strength and volume under long-term immersion in the raw liquid, thereby effectively fixing the parts within its installation cavity, ensuring good filtration and distribution of the raw liquid to the parts, and guaranteeing good sealing between the parts and the spinneret and machine base to prevent leakage during the spinning process.

[0023] Preferably, as an improvement, the sealing ring body is made of silicone rubber material.

[0024] This solution uses silicone rubber to make the sealing ring body. Compared with EPDM and nitrile rubber, silicone rubber has higher flexibility while ensuring heat resistance and oil resistance. Therefore, the silicone rubber sealing ring body is easier to handle when installing and removing parts, ensuring that the structure of the parts and the sealing ring body is not damaged while installing and removing parts.

[0025] Preferably, as an improvement, the sealing ring body is integrally formed, and the outer diameters of the upper sealing ring, the lower sealing ring, and the sleeve are the same.

[0026] This design incorporates a one-piece molding of the sealing ring body. Compared to other fixing methods such as bonding, the one-piece molding provides better structural strength, a longer service life, and helps control equipment costs. The upper sealing ring, lower sealing ring, and sleeve have the same outer diameter; that is, their outer circumferential surfaces are the same. This ensures sufficient space in the mounting cavity while also saving on manufacturing materials.

[0027] Preferably, as an improvement, the width of the upper sealing ring and the lower sealing ring is 8% to 12% of the outer diameter.

[0028] In this design, the width of the upper and lower sealing rings is set to 8%–12% of their outer diameter. This ensures that neatly stacked parts can be inserted into the mounting cavity through either the upper or lower sealing ring, while also providing good restraint for the parts. This ensures the parts are consistently held in place by the sealing rings throughout the installation and spinning process, guaranteeing optimal spinning performance. If the width of the upper and lower sealing rings exceeds 12% of their outer diameter, their inner diameter will be significantly smaller than the part's diameter. This makes inserting the parts into the mounting cavity through the sealing rings difficult, hindering ease of installation. Furthermore, the effective diameter of the sealing rings will decrease, leading to poor flow uniformity of the spinning solution as it passes through the sealing rings, thus affecting the uniformity of the yarn thickness and consequently impacting the spinning effect. If the width of the upper and lower sealing rings is less than 8% of their outer diameter, although it is easier to install the parts into the mounting cavity, the small width of the upper and lower sealing rings cannot provide a good limiting effect on the parts in the mounting cavity during installation and use. This can easily lead to displacement or even dislocation of the parts, which is not conducive to ensuring the sealing performance.

[0029] Preferably, as an improvement, the thickness of the upper sealing ring, the lower sealing ring, and the sleeve is 1mm to 3mm.

[0030] This design sets the thickness of the upper sealing ring, lower sealing ring, and sleeve to 1mm–3mm. This ensures the sealing ring maintains a good shape—the upper and lower sealing rings are horizontal, and the sleeve is vertical—preventing the sealing ring from collapsing. This allows the inner wall of the sealing ring to always be in contact with the outer wall of the component, and the outer wall of the sealing ring to always be in contact with the inner wall of the spinneret and the outer edge of the machine base, guaranteeing a tight seal during the spinning process and preventing leakage. Furthermore, the sealing ring containing the component can be pressed firmly against the outer edge of the machine base with relatively little force, further ensuring a tight seal during the spinning process.

[0031] Before adopting this solution, the applicant attempted to design the thickness of the sealing ring body to be 0.5mm in order to reduce the internal space occupied by the spinneret. However, since the sealing ring body is made of flexible material, when the thickness is too small, the sealing ring body cannot maintain its shape and will collapse. This not only makes installation difficult but also fails to guarantee a complete fit between the sealing ring body and the part for a good seal. Therefore, the applicant tried designing the thickness of the sealing ring body to be 5mm. While this maintained a good shape, the larger thickness required greater pressure from the spinneret to press it firmly against the outer edge of the machine base, thus requiring the operator to apply more force to tighten the spinneret onto the machine base for effective installation. Therefore, a thicker sealing ring body was inconvenient to install. After multiple trials, the applicant found that designing the thickness of the sealing ring body to be 1mm to 3mm not only maintained its good shape but also facilitated installation while ensuring a good seal after installation.

[0032] A spinning nozzle assembly includes the aforementioned double-layer sealing ring for spinning. A support distribution mesh, several filter cloths, and a metal pressure ring are installed in its mounting cavity. The filter cloths are located between the support distribution mesh and the metal pressure ring, and the filter cloths, support distribution mesh, and metal pressure ring have the same size.

[0033] The principles and advantages of this scheme are:

[0034] In actual use, first, several filter cloths are neatly stacked. Then, the stacked filter cloths are placed on the support and distribution net, and the metal pressure ring is pressed onto the filter cloths, so that several filter cloths are clamped between the support and distribution net and the metal pressure ring. Then, the filter cloths, along with the support and distribution net and the metal pressure ring, are placed into the mounting cavity to form the nozzle assembly. After the nozzle assembly in the spinning machine has been used for a period of time, it is removed from the spinneret. Then, a new jet plate and nozzle assembly are installed into the spinneret in sequence. The spinneret is then installed upside down on the trumpet-shaped base, so that the nozzle assembly is pressed tightly against the outer edge of the base.

[0035] 1. The nozzle assembly in this solution is a pre-fixed, integrated structure. When replacing the nozzle assembly, simply remove the old one and install the new one. Compared to sequentially placing the support distribution mesh, filter cloth, and other spinning components into the spinneret and stacking them neatly, the integrated nozzle assembly in this solution improves installation convenience and shortens installation time. Especially when replacing nozzle assemblies for a large number of spinning machines, this solution significantly reduces overall installation time, effectively minimizing downtime and improving spinning efficiency.

[0036] 2. By setting up a support distribution net and a metal pressure ring, and placing the filter cloth between the support distribution net and the metal pressure ring, the rigid metal distribution net and the metal pressure ring can support the soft filter cloth, making it easy to install the filter cloth together with the support filter net and the metal pressure ring into the installation cavity, and preventing the filter cloth from shifting or wrinkling during installation, thus ensuring the filtering effect of the nozzle assembly on the raw liquid during the spinning process.

[0037] 3. By designing the filter cloth, support distribution mesh, and metal pressure ring to be the same size, after the filter cloth, support distribution mesh, and metal pressure ring are stacked together and installed into the mounting cavity, the outer walls of the filter cloth, support distribution mesh, and metal pressure ring can all contact the inner wall of the mounting cavity, thereby being positioned by the mounting cavity. This prevents displacement or misalignment among the filter cloth, support distribution mesh, and metal pressure ring during installation and subsequent use, further ensuring the filtration and distribution effects of the nozzle assembly on the raw liquid.

[0038] Preferably, as an improvement, the outer wall of the sealing ring body and the inner wall of the spinneret are fitted with a clearance.

[0039] This design utilizes a gap fit between the outer wall of the sealing ring body and the inner wall of the spinneret. Compared to the traditional method where the sealing ring body is tightened inside the spinneret, this design not only facilitates the installation of the sealing ring body into the spinneret but also allows for easy removal of the spinneret assembly from the spinneret after use. Because the outer edge of the machine base has a certain width, and the spinneret is threaded to the outer wall of the machine base, even with a gap between the outer wall of the sealing ring body and the inner wall of the spinneret, the sealing ring body still ensures the sealing of the nozzle assembly when the spinneret presses it firmly against the outer edge of the machine base, thus preventing leakage during spinning.

[0040] Preferably, as an improvement, the metal pressure ring has a cross-shaped structure in the middle, and the cross-shaped structure is fixedly connected to the metal pressure ring.

[0041] This design incorporates a cross-shaped structure in the center of the metal pressure ring, which is then fixedly connected to the metal pressure ring. On one hand, the cross-shaped structure increases the contact area between the metal pressure ring and the filter cloth, thereby enhancing the support and clamping effect of the metal pressure ring on the filter cloth. On the other hand, the cross-shaped structure improves the structural strength of the metal pressure ring, ensuring that it does not deform during the installation process connecting the filter cloth and the support distribution mesh into the mounting cavity. This ensures that the metal pressure ring remains in close contact with the filter cloth, providing excellent support and guaranteeing effective filtration of the raw liquid.

[0042] Preferably, as an improvement, the support distribution net includes several layers of distribution plates that are stacked and fixed together, each layer of distribution plate has a different opening size, and the opening size of the distribution plate gradually decreases towards the side closer to the filter cloth.

[0043] This design incorporates a distribution network consisting of several overlapping and fixed distribution plates. Each layer has a different aperture size, with the aperture size decreasing towards the filter cloth. This multi-layered distribution system distributes the raw liquid after filtration through the filter cloth, improving the uniformity of the liquid flow from the spray plate and enhancing the spinning effect. Furthermore, the different aperture sizes on each layer, with the aperture size decreasing towards the filter cloth (i.e., the largest aperture on the side furthest from the filter cloth), result in the strongest structural strength for this distribution plate. This provides excellent support for the inner distribution plates and filter cloth, preventing deformation during installation and ensuring the overall installation effect of the nozzle assembly. Attached Figure Description

[0044] Figure 1 This is a cross-sectional view of the sealing ring body in an embodiment of the present invention.

[0045] Figure 2 This is a top view of the sealing ring body in an embodiment of the present invention.

[0046] Figure 3 This is a cross-sectional view of the metal pressure ring, filter cloth, and support distribution mesh in an embodiment of the present invention.

[0047] Figure 4 This is a top view of the metal pressure ring in an embodiment of the present invention.

[0048] Figure 5 This is a top view of the supporting distribution network in an embodiment of the present invention.

[0049] Figure 6 This is a cross-sectional view of the nozzle assembly in an embodiment of the present invention. Detailed Implementation

[0050] The following detailed description illustrates the specific implementation method:

[0051] The reference numerals in the accompanying drawings include: upper sealing ring 1, sleeve 2, lower sealing ring 3, metal pressure ring 4, first layer filter cloth 5, second layer filter cloth 6, support distribution net 7, mounting cavity 8, cross-shaped structure 9.

[0052] Example 1

[0053] As attached Figure 1 and Figure 2 As shown, a double-layer sealing ring for spinning includes a sealing ring body, which comprises an upper sealing ring 1, a lower sealing ring 3, and a sleeve 2 located between the upper sealing ring 1 and the lower sealing ring 3. The upper end of the sleeve 2 is connected to the upper sealing ring 1, and the lower end of the sleeve 2 is connected to the lower sealing ring 3. The upper sealing ring 1, the lower sealing ring 3, and the sleeve 2 form an installation cavity 8, which is used to install parts such as filter cloth. The dimensions of the installation cavity 8 match the dimensions of all parts stacked together. In this embodiment, the sealing ring body is made of silicone rubber and is integrally molded. The upper sealing ring 1, the lower sealing ring 3, and the sleeve 2 have the same outer diameter, the thickness of the upper sealing ring 1, the lower sealing ring 3, and the sleeve 2 is 1 mm, and the width of the upper sealing ring 1 and the lower sealing ring 3 is 8% to 12% of their outer diameter.

[0054] This embodiment also describes a spinning nozzle assembly, including the aforementioned double-layer sealing ring for spinning. The mounting cavity 8 of the sealing ring body contains, in sequence, a support and distribution mesh 7, several filter cloths, and a metal pressure ring 4. Figures 3 to 6 As shown, in this embodiment, the filter cloth has two layers: a first layer 5 and a second layer 6. The first and second layers are overlapped and stacked together, held between a support distribution net 7 and a metal pressure ring 4. The first layer 5 contacts the metal pressure ring 4, and the second layer 6 contacts the support distribution net 7. The dimensions of the first layer 5, the second layer 6, the metal pressure ring 4, and the support distribution net 7 are identical. The metal pressure ring 4 has a cross-shaped structure 9 in the middle, and the cross-shaped structure 9 and the metal pressure ring 4 are integrally formed. The support distribution net 7 includes several layers of distribution plates welded together. The opening size of each distribution plate is different, and the opening size of the distribution plates gradually decreases towards the second layer 6. After the nozzle assembly is installed in the spinneret cap, the outer wall of the sealing ring body and the inner wall of the spinneret cap are fitted with a clearance fit.

[0055] The specific implementation process is as follows:

[0056] Overlap the first layer of filter cloth 5 and the second layer of filter cloth 6, keeping the first layer of filter cloth 5 above the second layer of filter cloth 6; place the first layer of filter cloth 5 and the second layer of filter cloth 6 on the support distribution net 7, ensuring that the second layer of filter cloth 6 and the support distribution net 7 are in contact with the smallest contact opening of the distribution plate; place the technical pressure ring on the first layer of filter cloth 5, and after checking that the above parts are completely and neatly overlapped, pick up the overlapping metal pressure ring 4, the first layer of filter cloth 5, the second layer of filter cloth 6 and the support distribution net 7, and place the above parts into the mounting cavity 8 from the upper sealing ring 1 of the sealing ring body, thus completing the installation and fixing of the nozzle assembly.

[0057] After the nozzle assembly in the spinning machine has been used for a certain period of time, the filtration and distribution performance of its filter cloth and support distribution net 7 will decrease. At this time, it is necessary to remove the old nozzle assembly in the spinning machine. Specifically, rotate the spinneret relative to the machine base to disconnect the threaded connection between the spinneret and the machine base. Take out the nozzle assembly that has been used for a period of time from the spinneret, then put another nozzle assembly into the spinneret, then turn the spinneret upside down on the machine base, and re-thread the spinneret and the machine base. At this time, the nozzle assembly is pressed against the outer edge of the machine base by the spinneret, and the inner wall of the sealing ring body contacts the inner wall of the spinneret and the top of the outer edge of the machine base, thus achieving a seal between the nozzle assembly, the spinneret, and the machine base.

[0058] Clean the disassembled nozzle assemblies. Specifically, remove the metal pressure ring 4, the first layer filter cloth 5, the second layer filter cloth 6, and the support distribution net 7 from the mounting cavity 8 of the sealing ring body, and clean and dry these parts. Then, during normal operation of the spinning machine, repeat the above steps to install the metal pressure ring 4, the first layer filter cloth 5, the second layer filter cloth 6, and the support distribution net 7 into the mounting cavity 8 of the sealing ring body, completing the assembly of a new batch of nozzle assemblies. The spinning operation of the spinning machine and the assembly of the nozzle assemblies are carried out simultaneously. When the spinning machine is stopped for nozzle assembly replacement, the assembled nozzle assembly can be directly replaced into the spinning machine to improve the overall processing efficiency of the spinning operation.

[0059] This solution uses a sealing ring to fix multiple parts together to form an integrated nozzle assembly, which increases the ease of replacement and installation of the nozzle assembly. It can effectively shorten the installation time of the nozzle assembly of a single spinning machine, thereby significantly reducing the overall time for replacing the nozzle assembly of all spinning machines and improving spinning efficiency. This solution is particularly suitable for the replacement and installation of nozzle assemblies for large-scale spinning machines.

[0060] Table 1: The Influence of the Thickness of the Sealing Ring Body on Its Shape Maintenance and Part Installation and Sealing Performance

[0061]

[0062] Experimental data shows that the optimal thickness of the sealing ring body is 1mm to 3mm. At this thickness, the sealing ring body can maintain a good shape and facilitate the installation of parts, with an installation time of about 2 minutes. After installation, during use, the sealing ring body with this thickness can effectively fix the parts and prevent displacement or misalignment between the two parts, thereby ensuring the sealing performance of the nozzle assembly. This ensures that all spinning machines are basically leak-free after 24 hours of spinning.

[0063] Based on the experimental data of Examples 1-3 and Comparative Example 1 in Table 1, when the thickness of the sealing ring body is less than 1 mm, the sealing ring body will collapse, causing the mounting cavity 8 to deform. At this time, although the parts can be installed into the mounting cavity 8 of the sealing ring body relatively easily, the sealing ring body cannot play a good role in fixing the parts, which makes it easy for the parts to be displaced and misaligned during installation and use, thus affecting the sealing performance of the nozzle assembly. Consequently, 11% of the spinning machines leaked liquid after 24 hours of spinning operation.

[0064] Based on the experimental data of Examples 1-3 and Comparative Example 2 in Table 1, when the thickness of the sealing ring is greater than 3mm, although the sealing ring body can maintain a relatively good shape to ensure that its mounting cavity 8 does not deform, the excessive thickness of the sealing ring will make the sealing ring body relatively difficult to deform. Therefore, it is not convenient to install the parts into the mounting cavity 8 of the sealing ring body, which will increase the installation time of the parts. Furthermore, due to the thickness of the sealing ring body, when the spinneret fixes it on the trumpet-shaped machine base, it cannot press it tightly. As a result, the sealing performance between the nozzle assembly, the spinneret, and the machine base will be negatively affected, resulting in 5% of the spinning machines leaking liquid after 24 hours of spinning operation.

[0065] In summary, designing the thickness of the sealing ring body to be 1mm to 3mm not only facilitates the installation of parts into the mounting cavity 8, shortening installation time and improving spinning efficiency, but also ensures that the sealing ring body maintains a good shape to secure the parts effectively, preventing displacement or misalignment during installation and use. This guarantees the sealing performance of the nozzle assembly itself and reduces leakage. Furthermore, the 1mm to 3mm thick sealing ring body is easily pressed and fixed onto the flared base by the spinneret during installation, ensuring a tight seal between the nozzle assembly, the spinneret, and the base, further reducing leakage during spinning.

[0066] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A double-layer sealing ring for spinning, characterized in that: The device includes a sealing ring body made of flexible material, comprising an upper sealing ring, a lower sealing ring, and a sleeve located between the upper and lower sealing rings. One end of the sleeve is fixedly connected to the upper sealing ring, and the other end of the sleeve is fixedly connected to the lower sealing ring. The upper sealing ring, the lower sealing ring, and the sleeve form an installation cavity for mounting parts, including a support distribution mesh, a filter cloth, and a metal pressure ring. The dimensions of the installation cavity match the dimensions of all parts stacked together. The mounting cavity of the sealing ring body can pre-accommodate and fix the parts as a whole when replacing them, so that the sealing ring body with the old parts can be directly removed from the machine base, while the sealing ring body with the new parts can be installed as a whole into the spinneret and connected to the spinneret and the machine base.

2. The double-layer sealing ring for spinning according to claim 1, characterized in that: The sealing ring body is made of one of the following materials: silicone rubber, EPDM rubber, and nitrile rubber.

3. The double-layer sealing ring for spinning according to claim 2, characterized in that: The sealing ring body is integrally formed, and the outer diameters of the upper sealing ring, the lower sealing ring, and the sleeve are the same.

4. The double-layer sealing ring for spinning according to claim 3, characterized in that: The width of the upper and lower sealing rings is 8% to 12% of their own outer diameter.

5. A double-layer sealing ring for spinning according to claim 4, characterized in that: The thickness of the upper sealing ring, the lower sealing ring, and the sleeve is 1mm to 3mm.

6. A spinning nozzle assembly, characterized in that: The invention includes a double-layer sealing ring for spinning as described in any one of claims 1 to 5, wherein a support distribution net, a plurality of filter cloths and a metal pressure ring are installed in the mounting cavity, the plurality of filter cloths are located between the support distribution net and the metal pressure ring, and the plurality of filter cloths, the support distribution net and the metal pressure ring are of the same size.

7. A spinning nozzle assembly according to claim 6, characterized in that: The outer wall of the sealing ring body and the inner wall of the spinneret are fitted with a clearance.

8. A spinning nozzle assembly according to claim 7, characterized in that: The metal pressure ring has a cross-shaped structure in the middle, and the cross-shaped structure is fixedly connected to the metal pressure ring.

9. A spinning nozzle assembly according to claim 8, characterized in that: The support distribution net includes several layers of distribution plates that are stacked and fixed together. The opening size of each layer of distribution plate is different, and the opening size of the distribution plate gradually decreases towards the side closer to the filter cloth.

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