Quick change device for para-aramid spinneret plate assembly

Abstract

The utility model relates to the technical field of chemical fiber spinning equipment, in particular to a quick-changing device for a para-aramid spinneret plate assembly. The device comprises an assembly shell, a spinneret plate assembly, a connecting piece and an end cover which are connected in sequence, wherein the spinneret plate assembly is embedded in the assembly shell; the connecting piece comprises a positioning base face and a connecting boss, the positioning base face is inserted into the upper end of the assembly shell in a sealed mode through an inserting part, and a clamping groove is formed in the outer side face of the connecting boss. A connecting groove matched with the connecting boss is formed in the end cover, a clamping block protruding in the radial direction is arranged at the bottom of the side face of the connecting groove, and the connecting piece and the end cover are clamped and fixed through the clamping block and the clamping groove. Modularization of core components of the spinneret plate assembly is achieved, a clamping groove and clamping block connecting structure is adopted to replace a traditional thread structure, installation and replacement of the spinneret plate are simpler and faster, sealing performance is greatly improved, and production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chemical fiber spinning equipment technical field, especially a kind of para-aramid jet plate assembly quick-change device. BACKGROUND

[0002] In the field of high polymer melt spinning, due to the particularity of the material, the spinneret used is prone to problems such as material leakage, hole blockage, winding, broken filament, and flooding of the plate, which must be replaced to continue spinning production. The traditional spinneret assembly is usually fixed by screw connection. This method requires multiple turns to fix and has special requirements for tightening torque. It can only be operated with a special torque wrench. The spinneret assembly replacement efficiency is low, and the sealing reliability is poor. In addition, the production process has certain requirements for the temperature of the spinneret assembly body. If not operated in time, the component temperature may be too low, which may cause the material entering the spinneret to solidify and block the hole, making it impossible to use, and it can only be replaced again. The traditional spinneret assembly structure is easily corroded by the corrosive contact medium material, and the threaded part is also easily worn out due to repeated disassembly and assembly, resulting in loss of effective connection and fastening ability, and can only be scrapped, resulting in large component loss. The special torque wrench is also easily corroded by the corrosive medium on site, resulting in a very short service life and large loss. In summary, the traditional spinneret assembly structure has a high replacement frequency, poor spinning stability, and the production yield and quality of the product are affected to a certain extent.

[0003] To solve the above problems, some solutions have been proposed in the market. For example, Chinese patent document CN10760941U discloses a spinneret assembly capable of improving the quality of ultrafine denier yarn, which adopts a design with a round bowl-shaped bottom at the upper end to optimize the flow path of the spinning solution and reduce the phenomenon of filament aggregation. However, this solution does not solve the problems of filter screen blockage and difficult disassembly of the spinneret. Chinese patent document CN212104215U discloses a spinneret with an air layer assembly, which aims to improve the spinning conditions by introducing a small amount of air. Although this design improves the spinning quality to a certain extent, it does not solve the problems of frequent disassembly and inconvenient maintenance.

[0004] Therefore, the existing technology still has many deficiencies, especially in the aspects of convenient replacement and maintenance, there is no ideal solution. Based on the deficiencies in the prior art, it is of great significance to provide a para-aramid jet plate assembly quick-change device with simple structure, convenient operation and effective improvement of replacement success rate. UTILITY MODEL CONTENTS

[0005] In order to solve the problems of complicated operation, long time consumption and poor sealing performance of the existing aramid fiber spinneret assembly during replacement of the spinneret, the utility model provides a kind of fast replacement device of alignment aramid fiber spinneret assembly, and the traditional threaded connection is replaced by the connection of clamping groove and clamping block, so that the installation and replacement of spinneret become more simple and fast, and reliable sealing can be achieved.

[0006] The technical solutions of the utility model for solving the problems are as follows:

[0007] A kind of fast replacement device of alignment aramid fiber spinneret assembly, including sequentially connected assembly shell, spinneret assembly, connecting piece and end cover;The assembly shell is a cylindrical structure, and a disassembly groove suitable for embedding the spinneret assembly is provided inside, and the spinneret assembly is embedded with the assembly shell through the disassembly groove;The connecting piece includes a positioning base surface, and the lower surface of the positioning base surface is provided with a plug-in part, and the plug-in part is sealingly plugged into the upper end of the assembly shell, and the upper surface of the positioning base surface is provided with a connecting boss, and the outer side of the connecting boss is provided with a clamping groove;The end cover is provided with a connecting groove matched with the connecting boss inside, and the side bottom of the connecting groove is provided with a radially protruding clamping block, and the connecting piece and the end cover are fixed by clamping the clamping block and the clamping groove.

[0008] In some embodiments of the utility model, the plug-in part is a positioning boss, and the upper end of the disassembly groove is provided with a sealing base surface matched with the lower end surface of the positioning boss, and the height of the sealing base surface is lower than the height of the upper end surface of the assembly shell.

[0009] In some embodiments of the utility model, the bottom end surface of the assembly shell is provided with a first mounting hole, and the positioning base surface is provided with a second mounting hole corresponding to the first mounting hole, and the second mounting hole and the first mounting hole are fixedly connected by a fastener.

[0010] In some embodiments of the utility model, the bottom end surface of the assembly shell is further provided with an assembly auxiliary hole.

[0011] In some embodiments of the utility model, the height of the clamping block is less than the height of the connecting groove.

[0012] In some embodiments of the utility model, the upper surface of the connecting boss is provided with a sealing step, and the sealing step includes a first step and a second step, and a sealing element is arranged in the space limited by the second step and the first step.

[0013] In some embodiments of the utility model, the clamping groove is L-shaped, including an axial portion and a circumferential portion, the length of the circumferential portion is greater than the length of the axial portion, the axial portion provides a path for axial movement of the clamping groove and the clamping block, and the circumferential portion provides a path for circumferential movement of the clamping groove and cooperates with the clamping block in a clearance fit.

[0014] In some embodiments of the utility model, the both sides of the entrance of the axial part are equipped with guide bevels, and / or the upper side of the end of the circumferential part is rounded.

[0015] In some embodiments of the utility model, the inside of the end cover is further equipped with a first groove and a second groove, the first groove matches the first step, and the second groove matches the second step.

[0016] In some embodiments of the utility model, the sealing member is an O-shaped sealing ring.

[0017] In some embodiments of the utility model, the number of the clamping grooves and the clamping blocks is greater than or equal to 3.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The alignment aramid fiber spinneret assembly quick change device provided by the utility model realizes the modularization of the core component of the spinneret assembly, avoids the phenomenon that the traditional structure spinneret assembly is easy to scatter, is contaminated and damaged, and plays a good protection role on the core component; the clamping groove and clamping block connecting structure is adopted to replace the traditional thread structure, not only avoids the tediousness of multiple turns of tightening and the loss of special tools, makes the installation and replacement of the spinneret more simple and fast, but also avoids the phenomenon that the multiple turns of tightening of the traditional thread structure cause the misalignment or damage of the sealing member, leads to unreliable sealing, greatly improves the sealing capacity, ensures the good sealing between the spinneret assembly and the system, reduces the material leakage probability, reduces the spinneret assembly replacement probability, improves the production efficiency, and effectively reduces the production cost.

[0020] 2. The alignment aramid fiber spinneret assembly quick change device provided by the utility model is very convenient to clean or replace due to the detachable design between each component, not only helps to maintain the long-term stable operation of the equipment, but also reduces the maintenance cost, greatly simplifies the complex operation steps in the traditional spinneret replacement process, reduces the equipment downtime, and improves the production efficiency; not only suitable for the aramid fiber production field, but also suitable for other chemical fiber production equipment which needs to frequently replace or clean the spinneret, can greatly improve the production efficiency and product quality, and has important significance for the development of the high polymer melt spinning field. DRAWINGS

[0021] Figure 1 It is a front view cross-sectional structure schematic view of the alignment aramid fiber spinneret assembly quick change device of an embodiment of the utility model.

[0022] Figure 2 It is an explosion structure schematic view of the alignment aramid fiber spinneret assembly quick change device of an embodiment of the utility model.

[0023] Figure 3 Figure 1 is a structural schematic diagram of a connecting piece of a quick-change device for a parison aramid fiber spinneret assembly according to an embodiment of the present application.

[0024] Figure 4 Figure 2 is a structural schematic diagram of the connecting piece of the quick-change device for the parison aramid fiber spinneret assembly according to the embodiment of the present application when an end cover is inverted.

[0025] Reference signs:

[0026] 1 - assembled housing; 2 - spinneret assembly; 3 - connecting piece; 4 - end cover; 11 - disassembly groove; 111 - sealing base surface; 12 - first mounting hole; 13 - assembly auxiliary hole; 31 - positioning base surface; 32 - connecting boss; 33 - sealing member; 34 - positioning boss; 35 - sealing step; 311 - second mounting hole; 321 - clamping groove; 321a - guide inclined surface; 351 - first step; 352 - second step; 41 - connecting groove; 42 - first groove; 43 - second groove; 411 - clamping block. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0028] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are merely used to cooperate with the content disclosed in the present application, to enable those skilled in the art to understand and read, and are not used to limit the implementation conditions of the present application, and therefore do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" used in the present application are merely for the convenience of clear description, and are not used to limit the implementation range of the present application. The change or adjustment of the relative relationship, without substantially changing the technical content, is also considered as the implementation scope of the present application.

[0029] The present application provides a kind of parison aramid fiber spinneret assembly quick-change device, refer to Figure 1 、 Figure 2 And Figure 4, including sequentially connected assembly shell 1, spinneret assembly 2, connecting piece 3 and end cover 4;The assembly shell 1 is the structure of cylinder, is equipped with the decomposition groove 11 suitable for the embedding of spinneret assembly 2, spinneret assembly 2 is embedded with assembly shell 1 through decomposition groove 11;The connecting piece 3 includes positioning base surface 31, the lower surface of positioning base surface 31 is equipped with the plug-in part, and is sealed and plugged on the upper end of assembly shell 1 through the plug-in part, the upper surface of positioning base surface 31 is equipped with connecting boss 32, the outer side of connecting boss 32 is equipped with the clamping groove 321;The inside of end cover 4 is equipped with the connecting groove 41 matched with connecting boss 32, the side bottom of connecting groove 41 is equipped with the radially protruding clamping block 411, and connecting piece 3 is fixed with end cover 4 through the clamping block 411 and L-shaped clamping groove 321.The quick-change device for the alignment aramid fiber spinneret assembly provided in the utility model, spinneret assembly 2 is embedded in the inside of assembly shell 1, the upper end of assembly shell 1 is sealed and plugged with the positioning base surface of connecting piece 3 through the plug-in part, by inserting connecting boss 32 into end cover 4, connecting boss 32 and connecting groove 41 are nested with each other, connecting piece 3 is rotated by a certain angle, so that clamping groove 321 and clamping block 411 in the inside of end cover 4 are clamped, the fixation of assembly is realized, the structure is simple, and the operation is convenient, the replacement success rate can be effectively improved, the replacement process of spinneret is simplified, the replacement efficiency is improved, and the sealing property and reliability of equipment are enhanced, the accessory tool loss is reduced, and production cost is reduced.In the utility model, the spinneret assembly 2 is the core, is used to extrude high molecular polymer solution to form fiber, usually includes spinneret and matched filter sealing kit;The assembly shell 1 is frame, is used to accommodate spinneret assembly 2 and is assembled with connecting piece 3;Connecting piece 3 is designed with clamping groove 32, is convenient for being connected and disassembled with the clamping block 411 on end cover 4, and has good sealing performance;The shape and structure of end cover 4 are not specially limited, and the corresponding functions are met, can be connected with the predetermined device of chemical fiber spinning equipment, and is communicated with polymer solution pipeline system on equipment, in some specific embodiments of the utility model, the end cover 4 is the structure of cylinder.In the utility model, the decomposition groove 11 is usually set to match the external structure of spinneret assembly 2, so that spinneret assembly 2 and assembly shell 1 are embedded, so that the fixation of spinneret assembly 2 and the sealing between spinneret assembly 2 and assembly shell 1 are ensured.In the utility model, the connecting piece 3 is equipped with the through hole in the center in the axial direction, so that polymer solution passes through connecting piece 3 and enters spinneret assembly 2.

[0030] In some embodiments of the utility model, refer to Figure 1 And Figure 2The plug-in part is a positioning boss 34, the upper end of the disassembly groove 11 is provided with a sealing base surface 111 matched with the lower end surface of the positioning boss 34, the height of the sealing base surface 111 is lower than the height of the upper end surface of the assembled shell 1, the lower end surface of the positioning boss 34 is matched with the sealing base surface 111, the displacement of the spinneret assembly 2 can be prevented, the good sealing between the spinneret assembly 2 and the connecting piece 2 is ensured, and the phenomenon that the spinneret assembly 2 is easily scattered and contaminated in the traditional structure is avoided. The height of the sealing base surface 111 of the disassembly groove 11 is lower than the height of the upper end surface of the assembled shell 1, so that space is provided for the positioning boss 34 to be inserted into the assembled shell 1.

[0031] In some embodiments of the utility model, the bottom end surface of the assembled shell 1 is provided with a first mounting hole 12, the positioning base surface 31 is provided with a second mounting hole 311 corresponding to the first mounting hole 12, the second mounting hole 311 is fixedly connected with the first mounting hole 12 through a fastener, the assembled shell 1 and the connecting piece 3 are fixed through the fastener passing through the first mounting hole 12 and the second mounting hole 311, the connection is more reliable, loosening or falling off in the use process is avoided, and disassembly is facilitated. The number of the first mounting hole 12 and the second mounting hole 311 is greater than or equal to 4, and can be adjusted according to process requirements, for example, can be 4-24, and the fastener can be a bolt, a screw or a pin. Figure 2 And Figure 3 The first mounting hole 12 is 8, uniformly distributed along the circumference of the center line of the end surface of the assembled shell 1, the second mounting hole 311 is also 8, and is correspondingly distributed with the first mounting hole 12, so that each part of the structure can bear similar load, and the stability and durability of the structure are improved. In some preferred embodiments of the utility model, the bottom end surface of the assembled shell 1 is also provided with an assembly auxiliary hole 13 for fixing the assembled shell 1 on a matching tool during assembly, so that the assembled shell 1 does not rotate when the screw of the second mounting hole 311 is tightened, and Figure 2 The bottom end surface of the assembled shell 1 is provided with four assembly auxiliary holes 13.

[0032] In some embodiments of the utility model, referring to Figures 1 to 4 The height of the clamping block 411 is less than the height of the connecting groove 41, so that the clamping block 411 can slide after being inserted into the clamping groove 321, and clamping is realized.

[0033] In some embodiments of the utility model, referring to Figures 1 to 3The upper surface of the connecting boss 32 is provided with a sealing step 35, the sealing step 35 comprises a first step 351 and a second step 352, a sealing element 33 is arranged in the platform formed by the second step 352 and the first step 351, the sealing step structure can improve the connection precision and reliability, and improve the sealing performance, prevent the polymer solution from leaking, and the sealing element 33 is deformed during assembly, thereby playing a sealing role, so that the spinneret assembly 2 is in closed communication with the polymer solution pipeline on the equipment, and the stability and sealing performance of the spinneret under a high-temperature and high-pressure environment are ensured. Figure 3 The first step 351 and the connecting boss 32 are concentric ring structures, and the diameter of the first step 351 is smaller than that of the connecting boss 32, and the connecting boss 32 is provided with a through circular hole at the center, so that the polymer solution can pass through.

[0034] In some embodiments of the utility model, reference Figures 1 to 3 The clamping groove 321 is L-shaped and comprises an axial part and a circumferential part, the length of the circumferential part is greater than that of the axial part, the axial part provides a path for the axial movement of the clamping groove 321, and the circumferential part provides a path for the circumferential movement of the clamping groove 321 and is in gap cooperation with the clamping block 411; the L-shaped clamping groove 321 is arranged so that the clamping can be realized by rotating the connecting piece 3, the operation is convenient, the disassembly is convenient, the axial force is generated by the sliding of the L-shaped clamping groove 321 on the end cover 4, the sealing element 33 on the sealing step 35 on the connecting piece 3 is deformed, the sealing groove formed by the connecting piece 3 and the end cover 4 is filled, a sealing effect is achieved, and the good sealing performance of the whole assembly is ensured. The two sides of the inlet of the axial part are provided with guide inclined surfaces 321a, so that the clamping groove 321 and the clamping block 411 are aligned and slide; and the upper side of the end of the circumferential part is provided with a fillet, stress concentration is reduced, assembly and clamping are facilitated, the abrasion rate is reduced, and the service life is prolonged.

[0035] In some embodiments of the utility model, reference Figures 1 to 4 The first recess 42 is matched with the first step 351, and the second recess 43 is matched with the second step 352, so that the polymer solution is sealed during installation.

[0036] In some embodiments of the utility model, reference Figures 1 to 3 The sealing element 33 is an O-shaped sealing ring, which is simple in structure and good in sealing effect. The material of the O-shaped sealing ring should be suitable for the process medium, and the O-shaped sealing ring should have good elasticity.

[0037] In some embodiments of the utility model, reference Figures 1 to 4, the number of the clamping grooves 321 and the clamping blocks 411 is greater than or equal to 3. The number of the clamping grooves 321 and the clamping blocks 411 is greater than or equal to 3, which can be adjusted according to process requirements, for example, it can be 3-10, in some specific embodiments of the present application, referring to Figure 3 and Figure 4 , the number of the clamping grooves 321 and the clamping blocks 411 is 4. Preferably, referring to Figure 3 and Figure 4 , the clamping grooves 321 are evenly distributed along the circumference of the outer side of the connecting boss 32, and the clamping blocks 411 are evenly distributed along the circumference of the inner side of the connecting recess 41, which can ensure that each part of the structure bears similar load, improving the stability and durability of the structure.

[0038] Working principle: the alignment aramid fiber jet plate assembly quick-change device provided by the utility model, referring to Figures 1 to 4 , before use, the jet plate assembly 2 is loaded into the assembly shell 1, and is embedded with the assembly shell 1 through the disassembly groove 11, then the connecting piece 3 is buckled on the assembly shell 1, the positioning boss 34 provided on the lower surface of the positioning base surface 31 is inserted into the assembly shell 1 and cooperates with the sealing base surface 111 at the upper end of the disassembly groove 11, so that the jet plate assembly 2 is fixed, then the assembly shell is fixed on the matched tooling through the auxiliary mounting hole 13, then the second mounting hole 311 distributed around the positioning base surface 31 is corresponded with the first mounting hole 12 at the lower end surface of the assembly shell 1, the first mounting hole 12 and the second mounting hole 311 are connected and fixed by using the matched screw, so that the assembly shell 1 and the connecting piece 3 are assembled together to form a modular whole, which can prevent the jet plate assembly 2 from being scattered, dislocated and sent to the equipment for installation and use; when in use, the end cover 4 is first fixedly connected with the predetermined device on the equipment, then the sealing piece 33 is sleeved on the sealing step 35 of the connecting piece 3, then the upper end of the connecting piece 3 is inserted into the end cover 4, a certain angle is rotated to make the clamping block 411 and the axial part of the L-shaped clamping groove 321 align, then the connecting piece 3 is hung by the clamping block 411 inside the end cover 4 through radial rotation, clamping is realized, in the process, the sealing piece 33 is deformed to form a sealing effect, the jet plate assembly 2 is in closed communication with the polymer solution pipeline system on the equipment, and the assembly is completed.

[0039] When the jet plate assembly needs to be replaced after being used for a period of time, only the modular whole (i.e. the assembly shell 1 + the jet plate assembly 2 + the connecting piece 3) containing the jet plate assembly 2 is disassembled by rotating the connecting piece 3, which is convenient and efficient, improves the jet plate replacement speed, ensures the sealing property and stability of the whole equipment, and thus improves the continuity of the spinning process and the fiber quality.

[0040] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the present application should be covered by the claims of the present application.

Claims

1. A rapid exchange device for a para-aramid spinneret assembly, characterized by, The application relates to a nozzle assembly, which comprises an assembly shell (1), a spinneret assembly (2), a connecting piece (3) and an end cover (4) connected in sequence; the assembly shell (1) is in a cylindrical structure, and is internally provided with a disassembling groove (11) suitable for embedding the spinneret assembly (2); the spinneret assembly (2) is embedded with the assembly shell (1) through the disassembling groove (11); the connecting piece (3) comprises a positioning base surface (31), the lower surface of the positioning base surface (31) is provided with a plug-in part, the plug-in part is tightly plugged on the upper end of the assembly shell (1), the upper surface of the positioning base surface (31) is provided with a connecting boss (32), and the outer side of the connecting boss (32) is provided with a clamping groove (321); the inner side of the end cover (4) is provided with a connecting groove (41) matched with the connecting boss (32), the side bottom of the connecting groove (41) is provided with a radially protruding clamping block (411), and the connecting piece (3) and the end cover (4) are clamped and fixed through the clamping block (411) and the clamping groove (321).

2. The para-aramid spinneret assembly quick-change device of claim 1, wherein, The plug-in part is a positioning boss (34), the upper end of the disassembling groove (11) is provided with a sealing base surface (111) matched with the lower end surface of the positioning boss (34), and the height of the sealing base surface (111) is lower than the height of the upper end surface of the assembly shell (1).

3. The para-aramid spinneret assembly quick-change device of claim 1, wherein, The bottom end surface of the assembly shell (1) is provided with a first mounting hole (12), the positioning base surface (31) is provided with a second mounting hole (311) corresponding to the first mounting hole (12), and the second mounting hole (311) is fixedly connected with the first mounting hole (12) through a fastener.

4. The para-aramid spinneret assembly quick-change device of claim 3, wherein, The bottom end surface of the assembly shell (1) is further provided with an assembly auxiliary hole (13).

5. The para-aramid spinneret assembly quick change device of claim 1, wherein, The height of the clamping block (411) is smaller than the height of the connecting groove (41).

6. The para-aramid spinneret assembly quick-change device of claim 1, wherein, The upper surface of the connecting boss (32) is provided with a sealing step (35), the sealing step (35) comprises a first step (351) and a second step (352), and a sealing piece (33) is arranged in the space formed by limiting the first step (351) and the second step (352).

7. The para-aramid spinneret assembly quick-change device of claim 1, wherein, The clamping groove (321) is L-shaped, and comprises an axial part and a circumferential part; the length of the circumferential part is greater than the length of the axial part; the axial part provides a path for axial movement of the clamping groove (321); and the circumferential part provides a path for circumferential movement of the clamping groove (321) and gap-fitting with the clamping block (411).

8. The para-aramid spinneret assembly quick-change device of claim 7, wherein, The entrances of the axial part are provided with guide inclined surfaces (321a) on both sides; and / or the upper side of the end of the circumferential part is a rounded corner.

9. The para-aramid spinneret assembly quick-change device of claim 6, wherein, The inner side of the end cover (4) is further provided with a first groove (42) and a second groove (43); the first groove (42) is matched with the first step (351); and the second groove (43) is matched with the second step (352); and / or the sealing piece (33) is an O-shaped sealing ring.

10. The para-aramid spinneret assembly quick-change device of claim 1, wherein, The number of the clamping groove (321) and the clamping block (411) is greater than or equal to 3.

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