A para-aramid spinning powder feeding device

Abstract

This application provides a feeding device for para-aramid spinning powder, including a valve body, a valve body with an internal rotor, end caps at both ends, a motor, and a pulling mechanism. The rotor includes a shaft and blades; the end caps are provided with bearing seats, and the two ends of the shaft are mounted on the bearing seats via bearings; the motor output shaft passes through the rear end cap and is connected to the shaft. The pulling mechanism includes symmetrical guide blocks on both sides of the valve body and an inner sliding rod, the front end cap is connected to the two side fixing plates, one end of the sliding rod is connected to the fixing plate, and the other end is provided with a limiting ring; a telescopic sleeve is fitted over the sliding rod between the guide blocks and the limiting ring, and the two ends are sealed; the limiting ring is provided with a vent groove communicating with the telescopic sleeve. This device solves the problem of existing core-pulling unloading valves causing contamination and jamming due to exposed sliding parts in high-cleanliness and high-dust environments, and thus failing to operate stably for a long time, by using a sealed telescopic sleeve on the guide rod.

Description

Technical Field

[0001] This application relates to the field of spinning equipment technology, specifically to a para-aramid spinning powder feeding device. Background Technology

[0002] Para-aramid (PPTA) is a high-performance aromatic polyamide fiber with properties such as high strength and modulus, high temperature resistance, acid and alkali resistance, and lightweight. Para-aramid filaments are usually produced using a dry-jet wet spinning process. In this process, the stable feeding and sealed delivery of solid polymer powder (or intermediate powder) to the dissolving / mixing unit directly affects the fluctuation of the dopant concentration and the spinning quality.

[0003] In powder feeding and airlock isolation scenarios, existing technologies generally use a rotary valve in conjunction with a hopper to achieve quantitative discharge of fine powder and gas-solid isolation. However, when discharging fine-particle-size, loose, or easily agglomerated powders such as PPTA, agglomeration or material accumulation occurs between the impeller and the housing of the rotary valve. Especially during long-term operation or when the powder moisture content changes slightly, impeller jamming, poor discharge, or even complete blockage can easily occur.

[0004] Current rotary valves are difficult to clean and maintain. To address this issue, existing technologies have proposed a split / pull-out structure: the valve core and vanes are designed as modules that can be pulled out of the housing, eliminating the need for complete disassembly during cleaning and facilitating access to dead zones within the valve cavity. However, in spinning workshops where dust emissions are significant and negative pressure suction and strict cleanliness control are frequently employed, the sliding components used for extraction and repositioning in this pull-out structure are exposed or semi-exposed, easily attracting suspended dust. The grease, after absorbing dust, forms abrasive sludge, increasing pushing and pulling resistance, causing uneven strokes, and in severe cases, jamming and roughening, making long-term stable operation difficult. Utility Model Content

[0005] The purpose of this invention is to provide a feeding device for para-aramid spinning powder, which can solve the technical problem that existing core-pulling unloading valves, in high-cleanliness and high-dust environments such as para-aramid spinning, are contaminated and stuck due to exposed sliding parts, and cannot operate stably for a long time.

[0006] This application is achieved through the following technical solution, specifically: A feeding device for para-aramid spinning powder includes: a valve body, a rotor disposed within the valve body, end caps disposed at both ends of the valve body, a motor, and a pulling mechanism; the rotor includes a rotating shaft and a plurality of blades distributed circumferentially along the rotating shaft; the end caps are provided with bearing seats, and the two ends of the rotating shaft are respectively mounted in the bearing seats of the corresponding end caps via bearings; the output shaft of the motor passes through the end cap at the rear end of the valve body and is connected to the rotating shaft; The pull-out mechanism includes guide blocks symmetrically arranged on both sides of the valve body and slide rods slidably arranged within the guide blocks. A fixed plate extending to both sides is connected to the end cap at the front end of the valve body. One end of the slide rod is connected to the fixed plate, and a limit ring is installed at the other end. A telescopic sleeve is fitted on the outside of the slide rod between the guide block and the limit ring. The two ends of the telescopic sleeve are respectively sealed to the guide block and the limit ring. A vent groove communicating with the telescopic sleeve is provided on the limit ring.

[0007] In this solution, a telescopic sleeve, with its two ends sealed to a guide block and a limiting ring respectively, isolates the sliding stroke range of the slide rod from the external environment, forming an independent and clean sealed cavity. This prevents suspended PPTA dust in the spinning workshop environment from contacting the slide rod surface and its lubricant. Simultaneously, a ventilation groove on the limiting ring allows air inside the telescopic sleeve to circulate freely with the outside as it extends or compresses during the pulling motion. This balances the air pressure inside and outside the telescopic sleeve, preventing pulling resistance caused by negative or positive pressure. This ensures easy and smooth manual operation and protects the telescopic sleeve itself from pressure differential stress. This solution addresses the technical problem of existing core-pulling unloading valves in high-cleanliness, high-dust environments such as aramid spinning, where exposed sliding parts lead to contamination and jamming, hindering long-term stable operation.

[0008] As an improvement to the telescopic sleeve in this application, the telescopic sleeve is a bellows structure that is telescopic along its axial direction.

[0009] Furthermore, the two ends of the telescopic sleeve are detachably connected to the guide block and the limiting ring respectively via flanges.

[0010] As an improvement to the ventilation slot in this application, a filter screen is provided at the ventilation slot.

[0011] Furthermore, a protective cover is detachably provided at the end of the limiting ring away from the slide bar, and the protective cover covers the filter screen inside it.

[0012] Furthermore, the output shaft of the motor is connected to the rotating shaft via a coupling.

[0013] The beneficial effects of this application are as follows: The solution proposed in this application uses a telescopic sleeve with its two ends sealed to a guide block and a limiting ring, respectively, to isolate the sliding stroke range of the slide rod from the external environment, forming an independent and clean sealed cavity. This prevents suspended PPTA dust in the spinning workshop environment from contacting the slide rod surface and its lubricant. At the same time, the ventilation groove set on the limiting ring allows the air inside the telescopic sleeve to circulate freely with the outside when it extends or compresses during the pulling action. This balances the air pressure inside and outside the telescopic sleeve, avoiding the pulling resistance caused by negative or positive pressure inside, ensuring ease and smoothness during manual operation, and protecting the telescopic sleeve itself from damage due to pressure differential stress. This solves the technical problem of existing core-pulling unloading valves in high-cleanliness, high-dust environments such as aramid spinning, where exposed sliding parts lead to contamination and jamming, making long-term stable operation impossible.

[0014] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a para-aramid spinning powder feeding device in operation, as described in an embodiment of this application. Figure 2 This is a schematic diagram of the structure of a para-aramid spinning powder feeding device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of a para-aramid spinning powder feeding device in a clean state, as described in an embodiment of this application. Figure 4 This is a partially enlarged view of the limiting ring in the embodiments of this application.

[0016] Explanation of reference numerals in the attached figures: 1. Valve body; 2. Rotor; 21. Shaft; 22. Blade; 3. End cover; 4. Motor; 5. Pull-out mechanism; 51. Guide block; 52. Slide rod; 53. Fixing plate; 54. Limiting ring; 541. Vent groove; 542. Filter screen; 543. Protective cover; 55. Telescopic sleeve; 56. Flange; 6. Coupling. Detailed Implementation

[0017] The following will be combined with the appendix Figures 1-4The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0018] In view of the problems existing in the background technology or products, Figure 1 This illustration shows a structural schematic diagram of a para-aramid spinning powder feeding device in operation, according to an embodiment of this application. Figure 2 This paper shows a schematic diagram of a para-aramid spinning powder feeding device according to an embodiment of this application. Figure 3 A schematic diagram of a para-aramid spinning powder feeding device in a clean state, according to an embodiment of this application, is shown. Figures 1 to 3 As shown in the figure, this application provides a feeding device for para-aramid spinning powder, including: a valve body 1, a rotor 2 disposed in the valve body 1, end caps 3 disposed at both ends of the valve body 1, a motor 4, and a pulling mechanism 5; the rotor includes a rotating shaft 21 and a plurality of blades 22 distributed circumferentially along the rotating shaft 21; the end caps 3 are provided with bearing seats, and the two ends of the rotating shaft 21 are respectively mounted in the bearing seats of the corresponding end caps 3 through bearings; the output shaft of the motor 4 passes through the end cap 3 at the rear end of the valve body 1 and is connected to the rotating shaft 21; The pull-out mechanism 5 includes guide blocks 51 symmetrically arranged on both sides of the valve body 1 and slide rods 52 slidably arranged in the guide blocks 51. A fixing plate 53 extending to both sides is connected to the end cap 3 at the front end of the valve body 1. One end of the slide rod 52 is connected to the fixing plate 53, and a limit ring 54 is installed at the other end. A telescopic sleeve 55 is sleeved on the outside of the slide rod 52 between the guide blocks 51 and the limit ring 54. The two ends of the telescopic sleeve 55 are respectively sealed to the guide blocks 51 and the limit ring 54. The limit ring 54 is provided with a vent groove 541 communicating with the telescopic sleeve 55.

[0019] Specifically, the sliding stroke of the slide rod 52 is determined by the limiting ring 54, while the telescopic sleeve 55 ensures the isolation of the slide rod 52 from the external high-dust environment. Optionally, the telescopic sleeve 55 is made of a material with good sealing and wear resistance, such as silicone rubber or Teflon. The sealing connection between the telescopic sleeve 55 and the guide block 51 and the limiting ring 54 can be achieved using O-rings or other suitable sealing structures to ensure a good seal. The venting grooves 541 on the limiting ring 54 allow air to freely enter and exit during the extension and retraction of the telescopic sleeve 55, balancing the internal and external air pressure, preventing additional resistance from negative or positive pressure, ensuring smooth operation, and extending the service life of the telescopic sleeve 55. The venting grooves 541 are evenly distributed on the end face of the limiting ring 54.

[0020] Preferably, the output shaft of the motor 4 is connected to the rotating shaft 21 via a coupling 6. The coupling 6 is used to absorb axial, radial, and angular deviations between the output shaft of the motor 4 and the rotating shaft 21, avoiding damage to the rigid connection caused by installation errors or vibrations, while transmitting torque to ensure stable rotation of the rotor 2. The type of coupling 6 can be selected according to actual needs; for example, a flexible coupling can compensate for minor deviations between the motor 4 and the rotor 2, improving the stability of the system.

[0021] In one implementation, the telescopic sleeve 55 is a bellows structure that is axially expandable. The bellows structure, due to its multiple annular pleats, possesses excellent axial elasticity. When the slide rod 52 slides, the bellows can freely extend and compress within its elastic deformation range, thereby adapting to changes in the slide rod's stroke. This integrated structure also ensures its reliability as a sealing element, continuously and effectively isolating the slide rod's sliding area from the external dusty environment.

[0022] Preferably, both ends of the telescopic sleeve 55 are detachably connected to the guide block 51 and the limiting ring 54 respectively via flanges 56. By using bolts or clips to fix the flanges, the telescopic sleeve 55 can be quickly installed and disassembled, ensuring the reliability of the sealing connection. The sealing gasket between the flange faces prevents air or dust leakage. At the same time, in high dust environments, it is convenient to clean or replace damaged parts regularly, improving the adaptability and long-term stability of the device.

[0023] Figure 4 This is a partially enlarged view of the limiting ring in an embodiment of this application. For example... Figure 4 As shown, in one implementation, a filter 542 is provided at the ventilation slot 541. The filter 542 covers the opening of the ventilation slot 541, providing a channel for air circulation while blocking external dust particles. Its mesh size is small enough to allow gas to pass through but intercept solid pollutants, thereby improving the durability of the device in high-dust environments.

[0024] Preferably, a protective cover 543 is detachably provided at the end of the limiting ring 54 away from the slide rod 52, and the protective cover 543 covers the filter screen 542. The protective cover 543 is detachably fixed to the limiting ring 54 by threads or buckles. When the unloading valve is in operation, the protective cover 543 is fixed on the limiting ring 54, completely covering the filter screen 542 to prevent dust, liquid or other debris in the external environment from directly contacting and clogging or damaging the filter screen 542, ensuring that the internal sealing cavity of the telescopic sleeve 55 and the external ventilation channel are always clean and unobstructed. When the unloading valve is in cleaning mode, if it is necessary to clean or replace the filter screen 542, the operator can easily remove the protective cover 543 from the limiting ring 54 by unscrewing the threads or unfastening the buckles, making the maintenance of the filter screen 542 simple and quick.

[0025] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A feeding device for para-aramid spinning powder, comprising: The valve body (1), the rotor (2) disposed in the valve body (1), the end caps (3) disposed at both ends of the valve body (1), the motor (4), and the pull-out mechanism (5); the rotor (2) includes a rotating shaft (21) and multiple blades (22) distributed circumferentially along the rotating shaft (21); the end cap (3) is provided with a bearing seat, and the two ends of the rotating shaft (21) are respectively installed in the bearing seats of the corresponding end cap (3) through bearings; the output shaft of the motor (4) passes through the end cap (3) at the rear end of the valve body (1) and is connected to the rotating shaft (21); The characteristic feature is that the pull-out mechanism (5) includes guide blocks (51) symmetrically arranged on both sides of the valve body (1) and slide rods (52) slidably arranged in the guide blocks (51). The end cap (3) at the front end of the valve body (1) is connected to a fixing plate (53) extending to both sides. One end of the slide rod (52) is connected to the fixing plate (53), and the other end is equipped with a limiting ring (54). A telescopic sleeve (55) is sleeved on the outside of the slide rod (52) between the guide block (51) and the limiting ring (54). The two ends of the telescopic sleeve (55) are respectively sealed to the guide block (51) and the limiting ring (54). The limiting ring (54) is provided with a vent groove (541) communicating with the telescopic sleeve (55).

2. The para-aramid spinning powder feeding device according to claim 1, characterized in that, The telescopic sleeve (55) is a bellows structure that can extend and retract along its axial direction.

3. The para-aramid spinning powder feeding device according to claim 2, characterized in that, The two ends of the telescopic sleeve (55) are detachably connected to the guide block (51) and the limiting ring (54) respectively via flanges (56).

4. The para-aramid spinning powder feeding device according to claim 1, characterized in that, A filter screen (542) is provided at the ventilation slot (541).

5. The para-aramid spinning powder feeding device according to claim 4, characterized in that, The limiting ring (54) is detachably provided with a protective cover (543) at one end away from the slide bar (52), and the protective cover (543) covers the filter screen (542) therein.

6. The para-aramid spinning powder feeding device according to claim 1, characterized in that, The output shaft of the motor (4) is connected to the rotating shaft (21) via a coupling (6).

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