CN218711076U

CN218711076U - Flash spinning device

Info

Publication number: CN218711076U
Application number: CN202222266269.7U
Authority: CN
Inventors: 陈博屹; 史正云; 叶孔萌; 徐力博
Original assignee: Jiangsu Qingyun New Materials Co ltd
Current assignee: Jiangsu Qingyun New Materials Co ltd
Priority date: 2022-08-24
Filing date: 2022-08-26
Publication date: 2023-03-24
Anticipated expiration: 2032-08-26

Abstract

The utility model provides a flash distillation spinning device, it has solved solvent injection initial velocity and has adjusted the scheduling problem, it includes the spray tube and with the shower nozzle of spray tube intercommunication, the shower nozzle is close to the inside first cushion chamber that is provided with of one end of spray tube, first cushion chamber and spray tube intercommunication, the one end that the spray tube was kept away from to the shower nozzle is provided with spout and spout that communicate with first cushion chamber and is sealed by the spinneret, be provided with the second cushion chamber between spout and the first cushion chamber, be provided with pressure adjustment subassembly in the first cushion chamber, be provided with sensing component in the second cushion chamber. The utility model has the advantages of good solvent spraying initial speed adjusting effect, convenient assembly and disassembly, and the like.

Description

Flash spinning device

Technical Field

The utility model belongs to the technical field of the flash spinning, concretely relates to flash spinning device.

Background

Flash spinning is a spinning method in which a high molecular solution is positioned above the boiling point of a solvent and is extruded through a spinneret under high pressure to reach normal pressure. The flash evaporation spinning superfine fiber non-woven fabric is prepared through dissolving fiber forming polymer at high temperature and high pressure to prepare homogeneous spinning solution in certain concentration, high pressure feeding the homogeneous spinning solution into low pressure chamber, incomplete phase separation owing to slight pressure reduction, fast spinning solution passing through the spinning holes and fast expansion at the spinning nozzle to convert the solvent into steam to separate the steam from the polymer fast and form supersonic steam flow, and the polymer is cracked and stretched with the supersonic steam flow fast. However, in the actual production process, the initial speed of the solution spraying in the spray head needs to be controlled within a certain threshold range, otherwise the forming effect of the fiber is poor, but the existing flash spinning spray head lacks a corresponding pressure regulation and control means. In addition, the spinneret plate used by the existing spray head is inconvenient to assemble, and the specification of the spray hole cannot be flexibly disassembled and adjusted to meet the spinning requirements of different fibers.

In order to solve the defects of the prior art, people have long searched for and put forward various solutions. For example, the chinese patent document discloses a spinneret plate for flash spinning [202122009517.5], which comprises a hand positioning ring body, wherein a spinneret plate is fixedly arranged on the positioning ring body circumferentially and inwardly, a plurality of spinneret holes are arranged in order on the spinneret plate, one end of the spinneret plate is exposed out of the positioning ring body and forms an insertion positioning portion, the insertion positioning portion is detachably connected with a spinneret hole adjusting assembly arranged in the insertion positioning portion through an insertion positioning mechanism, the spinneret hole adjusting assembly is provided with a plurality of adjusting holes arranged in one-to-one correspondence with the spinneret holes, and the spinneret hole adjusting assembly is circumferentially provided with a fixing and clamping mechanism.

The inconvenient problem of spinneret dismouting has been solved to a certain extent to above-mentioned scheme, but this scheme still has a great deal of not enough, for example can't effectively restrict and adjust solution and spout a spinning initial velocity scheduling problem.

Disclosure of Invention

The utility model aims at the above-mentioned problem, provide a reasonable in design, the effectual flash distillation spinning device of solution initial speed control.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the utility model provides a flash spinning device, includes spray tube and the shower nozzle that communicates with the spray tube, and the shower nozzle is close to the inside first cushion chamber that is provided with of one end of spray tube, first cushion chamber and spray tube intercommunication, and the one end that the spray tube was kept away from to the shower nozzle is provided with the spout and the spout of communicating with first cushion chamber and is sealed by the spinneret, is provided with the second cushion chamber between spout and the first cushion chamber, is provided with the pressure adjustment subassembly in the first cushion chamber, is provided with sensing component in the second cushion chamber. The built-in pressure regulating assembly of shower nozzle restricts inside solution velocity of flow and pressure, and the cooperation sensing subassembly realizes feedback regulation, and effective control solution sprays the initial velocity in certain extent, guarantees fibre shaping quality.

In the above flash spinning apparatus, the nozzle includes a main seat body connected to the nozzle and a sub-seat body in threaded connection with the main seat body, the first buffer chamber is disposed between the main seat body and the sub-seat body, the nozzle is disposed at an end of the sub-seat body and is connected and fixed to the spinneret plate through a locking mechanism, and the second buffer chamber is disposed between the sub-seat body and the spinneret plate. The shower nozzle can be to main pedestal and divide the seat body to dismantle the separation, washs the maintenance to first cushion chamber, has prolonged the holistic life of shower nozzle.

In the flash evaporation spinning device, the locking mechanism comprises a locking step surface arranged at the nozzle, the edge of the spinneret plate is jointed and clamped with the locking step surface, the outer side of the end of the sub-base body is in threaded connection with a locking sleeve, and the locking sleeve is provided with a locking ring jointed and pressed with the spinneret plate. The locking mechanism realizes the quick assembly and disassembly of the spinneret plate, thereby adjusting the specification and form of the fiber in time.

In the above flash spinning device, the spinneret plate is provided with the spray holes which are distributed in central symmetry, the spray holes penetrate through the spinneret plate, the central axis of each spray hole is obliquely arranged relative to the spinneret plate, and the central axis of each spray hole is spirally distributed along the circumferential direction of the spinneret plate. The solution is sprayed out from the spray holes in an inclined mode, and compared with vertical spraying, the fibers of the non-woven fabric sprayed in a spiral mode are distributed more evenly.

In the above flash spinning device, the first buffer cavity includes a compression portion with a conical surface on the inner side and a flow guide portion with a cambered surface on the inner side, the flow guide portion is disposed on one side close to the nozzle, the compression portion is disposed on one side far away from the nozzle, and the pressure regulating assembly is communicated with the flow guide portion. The first buffer cavity guides the solution to flow and compress, and the first buffer cavity is matched with the second buffer cavity to realize rapid pressure reduction.

In the above flash spinning device, the pressure regulating assembly includes a pair of regulating plates concentrically mounted inside the flow guiding part, one of the regulating plates is a circular plate and the other regulating plate is an annular plate, the regulating plates respectively have regulating shafts extending to the outside of the nozzle, and the regulating shafts are connected with the speed changing assembly. The adjusting plates are concentrically arranged, and the pressure inside the flow guide part is accurately adjusted by independently adjusting the adjusting shafts.

In the above flash spinning device, the speed change assembly comprises a speed change gear fixed at the end of the regulating shaft, the speed change gear is respectively and sequentially meshed with a plurality of linkage gears for transmission, the speed change gear and the linkage gears are installed at two sides of the spray head, the linkage gears at two sides of the spray head are respectively meshed with a driving gear with a central axis matched with each other for transmission, and the center of the driving gear is fixedly connected with the driving shaft and externally connected with a hand wheel or a motor. The speed change assembly realizes the speed reduction rotation of the adjusting shaft, and avoids the damage of the pipe wall caused by the inertial impact of the solution on the spray pipe due to the over-high rotating speed.

In the flash spinning device, the inner side of the second buffer cavity is provided with an arc-shaped pressure relief part, and the pressure relief part is communicated with the nozzle. The pressure relief part uniformly conducts the solution to the spinneret plate, so that uniform filament discharge is ensured.

In the flash spinning device, the sensing assembly comprises a pressure sensor arranged in the second buffer cavity. The pressure sensor senses pressure change, and the pressure sensor and the motor feedback adjustment realize automatic pressure control, and maintain the initial speed of the solution within a certain threshold range.

In the flash spinning device, the spray pipe, the spray head and the spinneret plate are made of stainless steel. The stainless steel has better corrosion resistance, guarantees the service life of the spinning device, and is convenient to clean and maintain the inner cavity.

Compared with the prior art, the utility model has the advantages of: the pressure regulating assembly is matched with the sensing assembly to realize feedback regulation on the internal pressure of the nozzle, so that the initial speed of the solution jetted by the spinneret plate is effectively limited, and the fiber forming quality is ensured; the spinneret plate can be quickly assembled and disassembled through the locking mechanism, so that the specification of the spray hole of the spinneret plate is adjusted; the pressure regulating assembly is subjected to speed reduction regulation through the speed changing assembly, so that the pressure change of the spray pipe tends to be smooth, and the spray pipe is prevented from being damaged by inertial impact of solution.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a structural sectional view of the present invention;

fig. 3 is a partial cross-sectional view of the present invention;

fig. 4 is a schematic structural view of the pressure regulating assembly of the present invention;

fig. 5 is a schematic structural view of a spinneret plate according to the present invention;

in the figure, the nozzle 1, the nozzle 2, the nozzle 21, the main seat body 22, the sub-seat body 23, the first buffer cavity 3, the compression part 31, the flow guide part 32, the spinneret plate 4, the nozzle hole 41, the second buffer cavity 5, the pressure relief part 51, the pressure adjusting assembly 6, the adjusting plate 61, the speed changing assembly 62, the adjusting shaft 63, the speed changing gear 64, the linkage gear 65, the driving gear 66, the sensing assembly 7, the locking mechanism 8, the locking step surface 81, the locking sleeve 82 and the locking ring 83.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-2, a flash spinning device comprises a spray pipe 1 and a spray head 2 communicated with the spray pipe 1, wherein the spray pipe 1 is generally connected with a metering pump, a first buffer chamber 3 is arranged inside one end of the spray head 2 close to the spray pipe 1, the first buffer chamber 3 is communicated with the spray pipe 1, a nozzle 21 communicated with the first buffer chamber 3 is arranged at one end of the spray head 2 far away from the spray pipe 1, the nozzle 21 is sealed by a spinneret plate 4, and a second buffer chamber 5 is arranged between the nozzle 21 and the first buffer chamber 3. The polymer solution passes through the first buffer cavity 3 and the second buffer cavity 5 in sequence, is sprayed out from the spinneret plate 4 of the nozzle 21, and is subjected to the action of external hot air flow, and the solvent is quickly volatilized, so that the polymer is solidified into a fiber structure. A pressure adjusting assembly 6 is arranged in the first buffer cavity 3, and a sensing assembly 7 is arranged in the second buffer cavity 5. When the solvent passes through the first buffer cavity 3 in sequence, the pressure regulating component 6 limits the flow of the solvent, the solvent after the flow limitation is conducted to the second buffer cavity 5, and the sensing component 7 senses the flow of the solvent and the pressure of the inner wall of the sensing component 7.

The pressure regulating assembly 6 in the first buffer cavity 3 adjusts the solvent flow by controlling the size of the internal passage of the first buffer cavity 3 according to the flow change of the metering pump, the solvent flow sensed by the sensing assembly 7 and the dynamic regulation of the internal pressure of the spray head 2, and the pressure regulating assembly 6 comprises but is not limited to a pressure sensor, a flow sensor and a temperature sensor.

Specifically, the nozzle 2 includes a main seat body 22 connected to the nozzle 1 and a sub-seat body 23 in threaded connection with the main seat body 22, and the connection state is as shown in fig. 2, the first buffer chamber 3 is disposed between the main seat body 22 and the sub-seat body 23, the main seat body 22 and the sub-seat body 23 enclose the first buffer chamber 3, wherein the first buffer chamber 3 and the second buffer chamber 5 realize the processes of diversion, pressurization and depressurization, the solvent is discharged from the spinneret plate 4 and then is subjected to secondary depressurization to realize flash evaporation, the nozzle 21 is disposed at the end of the sub-seat body 23 and is connected and fixed to the spinneret plate 4 through the locking mechanism 8, and the second buffer chamber 5 is disposed between the sub-seat body 23 and the spinneret plate 4.

Furthermore, as can be seen from fig. 2, the locking mechanism 8 includes a locking step surface 81 disposed at the nozzle 21, the edge of the spinneret plate 4 is in fit and clamping connection with the locking step surface 81, the outer side of the end of the sub-base body 23 is in threaded connection with a locking sleeve 82, and the locking sleeve 82 is provided with a locking ring 83 in fit and pressing connection with the spinneret plate 4. The locking stepped surface 81 ensures the connection sealing performance of the spinneret plate 4 and the nozzle 21, and the locking sleeve 82 on the outer side, the spray pipe 1, the spray head 2 and the spinneret plate 4 are made of stainless steel.

Furthermore, the spinneret plate 4 is distributed with nozzle holes 41 which are distributed in a central symmetry manner, the nozzle holes 41 penetrate through the spinneret plate 4, the central axis of the nozzle holes 41 is inclined relative to the spinneret plate 4, the central axis of the nozzle holes 41 is spirally distributed along the circumferential direction of the spinneret plate 4, and the distribution state diagram is shown in fig. 5. The inclined directions of the spray holes 41 are consistent or the inclined directions of the adjacent spray holes 41 are opposite, so that the limiting position after spray condensation is in a net-shaped staggered arrangement, and the compactness is high.

Furthermore, the first buffer chamber 3 includes a compression portion 31 with a conical inner side and a flow guide portion 32 with a cambered inner side, the flow guide portion 32 is disposed on a side close to the nozzle 1, the compression portion 31 is disposed on a side far from the nozzle 1, and the pressure adjustment assembly 6 is communicated with the flow guide portion 32. The compression part 31 and the flow guide part 32 are connected into a whole, and the joint part is in smooth transition. The solvent flows into the flow guide part 32 and then is conducted to the second buffer chamber 5 through the compression part 31. The flow guide portion 32 and the compression portion 31 have circular cross sections and are fitted to the compression portion 31.

In addition, as shown in fig. 4, the pressure adjusting assembly 6 includes a pair of adjusting plates 61 concentrically installed inside the guide 32, wherein one of the adjusting plates 61 is a circular plate and the other adjusting plate 61 is an annular plate, the adjusting plates 61 respectively have adjusting shafts 63 extending to the outside of the head 2, and the adjusting shafts 63 are connected with a speed changing assembly. The adjusting shaft 63 drives the adjusting plate 61 to rotate under the driving of the speed changing assembly 62, and when the circular plate-shaped adjusting plate 61 is flush with the annular plate-shaped adjusting plate 61, the adjusting plate 61 is completely closed or completely communicated by the adjusting plate 61.

Meanwhile, fig. 3 is a partially enlarged schematic view of fig. 2, the pressure adjusting assembly 6 in fig. 4 is used for turning over the adjusting plate 61, the speed changing assembly 62 includes a speed changing gear 64 fixed at the end of the adjusting shaft 63, the speed changing gear 64 is respectively engaged with a plurality of linkage gears 65 for transmission, the speed changing gear 64 and the linkage gears 65 are installed at two sides of the spray head 2, the linkage gears 65 at two sides of the spray head 2 are respectively engaged with a driving gear 66 with a matched central axis, and the centers of the driving gears 66 are fixedly connected through a driving shaft 67 and externally connected with a hand wheel or a motor. The link gear 65 realizes the speed change transmission of the link gear 65 and the driving gear 66, and the driving gear 66 is connected with the same driving shaft 67, so that the speed change gear 64 and the adjusting shaft 63 synchronously rotate reversely.

If a motor is adopted to drive the driving shaft 67, the driving shaft 67 drives the driving gear 66, the linkage gear 65 and the speed change gear 64 to carry out variable speed transmission, the spray heads 2 on the two sides of the spray heads 2 synchronously and reversely rotate, and drive the circular plate and the annular plate to reversely rotate through the adjusting shaft 63, and the circular plate and the annular plate rotate to be flush to keep the diversion part 32 closed or communicated by adjusting the modulus and the gear number of the linkage gear 65 along with the rotation of the motor; or the circular plate and the annular plate are mutually vertical and one adjusting plate 61 is flush with the section of the flow guide part 32, so that the first buffer cavity 3 is kept in a semi-communication state; or the linkage gear 65 is separated manually or by an external electromagnetic push rod, so that each adjusting plate 61 rotates to a specified angle independently.

An arc-shaped relief portion 51 is provided inside the second buffer chamber 5, and the relief portion 51 communicates with the nozzle 21. The second buffer chamber 5 is opposite to the nozzle 21, and its relief 51 is flush with the port of the nozzle 21.

In summary, the principle of the present embodiment is: the built-in pressure adjustment subassembly 6 of first cushion chamber 3 of 2 inside of shower nozzles, the built-in sensing subassembly 7 of second cushion chamber 5 respond to the internal pressure and change, through the inside solvent flow of pressure adjustment subassembly 6 feedback adjustment shower nozzle 2 to the solvent initial velocity restriction with the injection of spinneret 4 is in certain extent, guarantees flash distillation fiber forming quality.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the nozzle 1, the nozzle 2, the nozzle 21, the main housing 22, the sub-housing 23, the first buffer chamber 3, the compressing portion 31, the guiding portion 32, the spinneret plate 4, the nozzle hole 41, the second buffer chamber 5, the relief portion 51, the pressure adjusting assembly 6, the adjusting plate 61, the speed changing assembly 62, the adjusting shaft 63, the speed changing gear 64, the linkage gear 65, the driving gear 66, the sensing assembly 7, the locking mechanism 8, the locking step surface 81, the locking sleeve 82, the locking ring 83, etc. are used more frequently herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any one of the additional limitations of the present invention.

Claims

1. The utility model provides a flash distillation spinning device, includes spray tube (1) and shower nozzle (2) with spray tube (1) intercommunication, its characterized in that, shower nozzle (2) be close to inside first cushion chamber (3) that is provided with of one end of spray tube (1), first cushion chamber (3) and spray tube (1) intercommunication, shower nozzle (2) keep away from one end of spray tube (1) be provided with spout (21) with first cushion chamber (3) intercommunication just spout (21) seal by spinneret (4), spout (21) and first cushion chamber (3) between be provided with second cushion chamber (5), first cushion chamber (3) in be provided with pressure adjustment subassembly (6), second cushion chamber (5) in be provided with sensing subassembly (7).

2. A flash spinning device according to claim 1, wherein said nozzle (2) comprises a main body (22) connected to said nozzle (1) and a sub-body (23) screwed to said main body (22), said first buffer chamber (3) is disposed between said main body (22) and said sub-body (23), said nozzle (21) is disposed at the end of said sub-body (23) and is connected to said spinneret (4) by a locking mechanism (8), and said second buffer chamber (5) is disposed between said sub-body (23) and said spinneret (4).

3. A flash spinning device according to claim 2, characterized in that said locking mechanism (8) comprises a locking step surface (81) arranged at the nozzle (21), the edge of said spinneret (4) is fit and clamped with said locking step surface (81), the outer side of the end of said sub-seat (23) is screw-connected with a locking sleeve (82), said locking sleeve (82) has a locking ring (83) fit and pressed with the spinneret (4).

4. A flash spinning device according to claim 2, characterized in that said spinneret (4) is provided with said nozzles (41) symmetrically distributed about the center, said nozzles (41) penetrate said spinneret (4), the central axis of said nozzles (41) is inclined with respect to said spinneret (4), and the central axis of said nozzles (41) is spirally distributed along the circumference of said spinneret (4).

5. A flash spinning device according to claim 1, characterized in that said first buffer chamber (3) comprises a compression part (31) with a conical inner side and a flow guiding part (32) with a cambered inner side, said flow guiding part (32) is arranged at the side close to the nozzle (1) and said compression part (31) is arranged at the side far from the nozzle (1), and said pressure regulating assembly (6) is communicated with said flow guiding part (32).

6. A flash spinning apparatus according to claim 5, characterized in that said pressure regulating assembly (6) comprises a pair of regulating plates (61) concentrically mounted inside the flow guiding portion (32), one of said regulating plates (61) being a circular plate and the other regulating plate (61) being an annular plate, said regulating plates (61) having regulating shafts (63) extending to the outside of the nozzle (2), said regulating shafts (63) being connected to a speed changing assembly (62).

7. A flash spinning device according to claim 6, characterized in that the speed change assembly (62) comprises a speed change gear (64) fixed at the end of the adjusting shaft (63), the speed change gear (64) is respectively meshed with a plurality of linkage gears (65) for transmission in sequence, the speed change gear (64) and the linkage gears (65) are installed at two sides of the nozzle (2), the linkage gears (65) at two sides of the nozzle (2) are respectively meshed with a driving gear (66) with a matched central axis, the centers of the driving gears (66) are fixedly connected through a driving shaft (67) and externally connected with a hand wheel or a motor.

8. A flash spinning device according to claim 1, characterized in that inside the second buffer chamber (5) is arranged a circular arc relief (51), and the relief (51) is connected to the nozzle (21).

9. A flash spinning device according to claim 8, characterized in that said sensing unit (7) comprises a pressure sensor arranged inside the second buffer chamber (5).

10. A flash spinning device according to claim 1, characterized in that the nozzle (1), the nozzle (2) and the spinneret (4) are made of stainless steel.