CN116408004A - High temperature resistant black spandex continuous polymerization reactor feed inlet self-cleaning mechanism - Google Patents

Abstract

The invention discloses a self-cleaning mechanism for a feed port of a high-temperature-resistant black spandex continuous polymerization reactor, which includes a tubular feeder, and the inside of the feeder is equipped with a first feed channel and a second feed channel arranged inside and outside; The outlet end of the feeder is equipped with an anti-glue component. The anti-glue component includes a rotatable scraper body. The scraper body is equipped with an auxiliary scraper. One end of the auxiliary scraper contacts the scraper body. The other end of the auxiliary scraper One end is elastically connected with the outer wall of the feeder. In the present invention, the scraper main body is stirred and scratched at the outlet end of the feeder, and the scraper main body is cleaned by the auxiliary scraper, which can reduce the situation of gelling, avoid the material from blocking the channel, and make the material enter the reactor. Avoid irregular pressure fluctuations in the process, improve the uniformity of product quality, reduce the frequency of cleaning during production, and improve production efficiency.

Description

High temperature resistant black spandex continuous polymerization reactor feed inlet self-cleaning mechanism

technical field

The invention belongs to the technical field of spandex polymerization, and in particular relates to a self-cleaning mechanism for a feed port of a high-temperature-resistant black spandex continuous polymerization reactor.

Background technique

The polyurethane solution used in the production of spandex yarn is realized through a two-step reaction: in the first step, the two main raw materials, diisocyanate (MDI) and polytetramethylene ether glycol (PTMEG), are first mixed in a certain molar ratio Transported to the prepolymerization reactor for mixing, prepolymerization, and cooling to generate isocyanate-terminated low-molecular-weight prepolymers; in the second step, the prepolymers were transported to the chain extension reactor while adding solvent dimethylacetamide ( DMAC) and chain extender, chain terminator for chain growth reaction, by adjusting the stoichiometry of mixed amines, the chain extension reaction of polymer molecules is stopped in time, so as to obtain the ideal polyurethane polymer solution, that is, spandex spinning Silk stock solution.

In the prior art, the second reactor of the core equipment used to realize the above-mentioned second step reaction is provided with a feed pipe, and the feed pipe is used to dissolve the prepolymer solution in the first step reaction (the prepolymer is dissolved in the solution in DMAC) into the second reactor. However, the traditional feeding pipe has always had defects, mainly in the violent reaction between the prepolymer solution (referred to as PPs) and the diamine mixture solution (referred to as Anmine) at the moment of flowing out from the outlet end of the feeding pipe, making the feeder The gel (condensate) phenomenon often occurs at the discharge end of the feed pipe, and the gelation process is slow and does not stop, which makes the gel continue to increase during the production process, blocking the feed channel, and making the material enter the reactor. Fluctuations in the flow rate occur in the medium, which affects the uniformity of product quality, and the continuous occurrence of gel greatly shortens the cleaning cycle of the equipment, resulting in the fact that the production often has to be stopped for cleaning due to the blockage of the feed pipe, which will affect the product quality. As well as production efficiency, harmful solid waste will be generated during cleaning and discharge.

In order to overcome the deficiencies of the prior art, people have been exploring and proposing various solutions, for example: the invention patent with the notification number CN102391452B relates to a reactor feed pipe for the continuous polymerization of spandex, including the feed pipe Body, mixed amine feed pipe, prepolymer feed pipe, end face flange cover and manual scraper system; this invention is manually operated with a handle, which can make the scraper take the mixed amine pipe as the center of rotation, and at the same time push and pull the handle, Make the scraper reciprocate back and forth along the mixed amine tube. It is this movement that keeps the end face of the feed pipe inserted into the reactor in a disturbed environment from time to time, which can prevent the continuous generation of gelatin during production. However, this invention requires manual operation and is still prone to gumming during use. The utility model with the notification number CN216964534U relates to an anti-coagulation device for the feed port of the spandex continuous reactor, including the main feed pipe and the auxiliary feed pipe, which are realized by a specially designed sleeve-type stirring head driven by a telescopic rotating control part. Reciprocating rotation and advance and retreat can effectively prevent the generation of condensate at the reactor inlet, thereby ensuring the normal progress of the chain extension reaction in the reactor, and overcoming the low production efficiency caused by the frequent shutdown and cleaning of the traditional reactor inlet due to blockage disadvantages. However, the device has a complex structure, is not easy to process, and easily causes wear of the main feeding pipe and the auxiliary feeding pipe, which affects the service life of the reactor.

Contents of the invention

The purpose of the present invention is to provide a self-cleaning mechanism for the feeding port of a high-temperature-resistant black spandex continuous polymerization reactor with simple structure, easy processing, and low feeder wear rate, which can reduce the situation of gelling, avoid material blocking the passage, and It can avoid irregular pressure fluctuations in the feeding process and improve the uniformity of product quality.

The technical scheme that the present invention takes for realizing the above object is:

The self-cleaning mechanism of the feed port of the high-temperature-resistant black spandex continuous polymerization reactor includes a tubular feeder, and the inside of the feeder is equipped with a first feed channel and a second feed channel set inside and outside; the outlet of the feeder The end is equipped with anti-glue components;

The anti-glue assembly includes a rotatable scraper body, the scraper body is equipped with an auxiliary scraper, one end of the auxiliary scraper is used to abut against the scraper body, the other end of the auxiliary scraper is connected to the feeder

The outer wall of the device is elastically connected.

Using the above technical scheme, the diamine mixture solution (Anmine for short) is fed through the first feeding channel set in the inner layer, and the prepolymer solution (PPs for short) is fed through the second feeding channel set in the outer layer. After the material is put in for a certain period of time, the outlet end of the feeder is stirred and scratched by the rotatable scraper main body in the anti-glue assembly, which can reduce the gelation and avoid physically blocking the passage inside the feeder. In addition, one end of the auxiliary scraper can be intermittently contacted with the outer surface of the scraper main body, which can clean the scraper main body, prevent materials from adhering to the surface of the scraper main body, and further reduce the chance of material sticking. In addition, the rotation of the main body of the scraper and the connection of the auxiliary scraper with the feeder through elastic parts can generate a certain vibration at the outlet end of the feeder, which helps to improve the fluidity of the material at the outlet end of the feeder and prevents the material from Adhering to the inner wall of the feeder or the surface of the anti-glue component; and in the process of vibration energy transmission, it can avoid irregular pressure fluctuations when the material enters the reactor, and improve the uniformity of product quality . Through the setting of the anti-glue component, the frequency of cleaning can be reduced in production, the problem of parking for cleaning can be avoided, and the production efficiency can be greatly improved.

According to one embodiment of the present invention, the anti-glue assembly includes a rotating shaft, an annular baffle and a connecting ring; Matching; the rotating shaft is set inside the first feeding channel, the annular baffle is sleeved outside the rotating shaft, and one end of the rotating shaft is connected to the main body of the scraper; the annular baffle is equipped with a gap for connecting with the second feeding channel matched with the outlet port.

Further, the annular baffle is attached to the outlet end of the feeder, and is used to block the second feeding channel, and the material can be discharged through the gap provided thereon. The notch is positioned away from the auxiliary scraper.

Thus, the scraper body is connected to the rotating shaft, and the end of the rotating shaft away from the scraper body is connected to the output end of the servo motor. In this way, the automatic rotation of the scraper body can be realized, or the scraper body can be programmed to rotate according to actual needs.

The setting of the annular baffle separates the outlet ports of two different materials (PPs and Anmine) from each other, thereby reducing the probability of materials mixing at the outlet port of the feeder. Moreover, the size of the gap on the annular baffle can also be set according to the actual situation, so as to control the feeding rate of PPs, so that it can be fed in a certain proportion with Anmine, which is conducive to the positive progress of the continuous reaction of spandex and reduces material waste .

The gap on the annular baffle is set away from the auxiliary scraper, which can prevent the material from adhering to the surface of the auxiliary scraper during feeding and reduce the probability of material mixing. Since one end of the auxiliary scraper is elastically connected to the outer wall of the feeder through an elastic member, when the rotating shaft drives the scraper body to rotate, the auxiliary scraper scrapes against different areas of the surface of the scraper body to avoid material or jelly Adhesion. In addition, during the abutment, mutual movement and detachment process between the auxiliary scraper and the scraper main body, the elastic member transmits part of the vibration energy to the outer wall of the feed pipe, which can improve the uniformity and fluidity of the material inside the feeder.

The anti-glue component is connected with the outer wall of the feeder through the connecting ring body, which can improve the stability of the overall structure and prevent parts such as the main body of the scraper from falling off. The rotating shaft drives the main body of the scraper to rotate, and the auxiliary scraper scrapes against the surface of the main body of the scraper. The vibration energy generated during this process can be transmitted to the annular baffle, the connecting ring, and further to the feeder. On the one hand, it promotes the flow of materials Flow and prevent adhesion. On the other hand, through collision and knocking between different parts, it can also improve the fit between different parts in the anti-glue assembly and prevent parts from being misaligned.

Further, the rotating shaft can drive the scraper main body to move back and forth along the axis.

According to an embodiment of the present invention, the edge of the scraper main body is provided with a stepped portion, and the stepped portion matches the inner wall of the first feeding channel and the inner diameter of the annular baffle.

Thus, the step on the main body of the scraper fits the inner wall of the first feed channel and the inner diameter of the annular baffle. The fit tightness of the outlet end of the device to prevent material leakage. In addition, the cooperation between the scraper body and the ring-shaped baffle can reduce the contact area between the scraper body and the feeder during rotation, especially to avoid direct contact between the scraper body and the outer wall of the feeder, thereby preventing the feeding The wear of the outer wall of the reactor helps to ensure the stability of the connection between the anti-glue component and the feeder, especially the probability of the connection ring falling off is greatly reduced, and the self-cleaning process of the reactor feed port is ensured.

Further, the width of the scraper main body gradually decreases radially from the inside to the outside, forming sharp corners at the outer edge of the scraper main body. In this way, the material in the first feed channel will less spread to the two ends of the scraper body when flowing through the surface of the scraper body, thereby reducing the probability of mixing with the material in the second feed channel , so as to prevent the phenomenon of gelling.

Further, at least the part of the side of the main body of the scraper that cooperates with the auxiliary scraper is a curved surface. In this way, the contact between the auxiliary scraper and the side of the main body of the scraper can be facilitated, and during the contact process, the elastic member connected to the auxiliary scraper is not uniformly stressed, which can avoid elastic fatigue and ensure the service life.

Further, the end of the scraper body away from the feeder is provided with a guiding slope or a guiding curved surface, which helps to guide the flow of materials and reduce the range of material splashing.

According to an embodiment of the present invention, the end of the auxiliary scraping strip away from the scraper main body is connected to the connecting ring body through a spring, and the length direction of the auxiliary scraping strip intersects the radial direction of the connecting ring body.

Further, the inside of the connecting ring body is fixedly connected with a short guiding rod extending inward, one end of the short guiding rod is connected to the inner wall of the connecting ring body, the other end of the short guiding rod extends inward along the direction intersecting the radial direction, and the spring Sleeved on the outside of the short guide rod.

Therefore, through the cooperation of the spring and the short guide rod, the extending direction of the auxiliary scraping strip can be ensured, and the elastic connection between the auxiliary scraping strip and the outer wall of the feeder can be realized through the connecting ring body.

According to one embodiment of the present invention, the side of the connecting ring body away from the scraper main body is provided with an extension section for matching with the outer wall of the feeder; the inner wall of the extension section is provided with an annular rib, and the feeder The outer wall is configured with a ring groove, and the ring-shaped convex rib can be embedded in the ring groove.

On the one hand, the setting of the ring-shaped ribs cooperates with the ring groove to ensure the connection between the connecting ring body and the outer wall of the feeder, and on the other hand, it also seals the outlet end of the feeder to prevent the material from extending along the connecting ring body. segments flow outward.

Further, the end of the extension section is provided with a fastening jaw, and the outer wall of the feeder is provided with a locking ring, and the fastening jaw can be engaged inside the locking ring.

Therefore, the contact area between the connecting ring body and the outer wall of the feeder can be enlarged through the extension section, and the tightness of the connection between the connecting ring body and the feeder can be improved through the cooperation of the fastening jaws and the locking ring, so as to avoid the The glued components came off by accident. In addition, the setting of the fastening jaws leaves a certain space between the extension of the connecting ring and the outer wall of the feeder, which helps to dissipate excess vibration energy and avoid excessive local temperature at the outlet of the feeder , reduce the impact of anti-glue components on materials.

According to one embodiment of the present invention, the outer wall of the feeder is provided with a positioning ring, the inner wall of the positioning ring is threadedly matched with the outer wall of the feeder, and the outer wall of the positioning ring is fitted with the inner wall of the fastening jaw.

The outer wall of the positioning ring is provided with a first rib, the inner wall of the fastening jaw is provided with a first groove, and the first rib is engaged in the first groove. One end of the positioning ring abuts against the inner wall of the extension section, and the other end abuts against the inner wall of the locking ring.

In this way, the extension section on the connecting ring body, the locking ring and the positioning ring form a multi-layer wrapped structure, which can improve the connection tightness between the three. On the one hand, it can prevent the connecting ring body from falling off, and on the other hand, it helps the connection The transmission efficiency of the vibration energy generated at the end of the ring body to the locking ring and the positioning ring can realize the transmission and consumption of vibration energy in a short time, thereby improving the stability of the outlet end of the feeder and reducing the impact of the anti-glue component on the feed. The impact of the feeding process can avoid irregular pressure fluctuations and improve the uniformity of product quality.

Further, the outer wall of the positioning ring is surrounded by a plurality of sliding grooves extending along the axis, and the inner wall of the fastening jaw is configured with a second protrusion for matching with the sliding grooves. Thus, the positioning and matching of the positioning ring and the fastening jaw can be realized through the cooperation of the slide groove and the second protrusion, preventing the connecting ring body from shifting, misaligning or falling off. In addition, the cooperation between the chute and the second protrusion further expands the contact area between the fastening jaw and the positioning ring, which helps to transmit the vibration energy of the extension section to the outer wall of the feeder, thereby improving the fluidity of the internal material.

Further, the side of the positioning ring close to the outlet end of the feeder includes a plurality of ring bodies with successively increasing outer diameters, and the plurality of ring bodies are all attached to the inner wall of the fastening jaw.

Thus, the contact area between the positioning ring and the fastening jaw can be further enlarged, and the connecting ring body can be prevented from falling.

According to one embodiment of the present invention, the inside of the locking ring is provided with an avoidance groove; the inside of the avoidance groove is provided with an elastic abutment ring, and the elastic abutment ring is sleeved on the outer wall of the feeder, and elastically The abutment ring and the end of the positioning ring are arranged in close contact.

In this way, the energy generated by the rotation of the main body of the scraper in the anti-glue assembly and the vibration energy generated by the auxiliary scraper are transmitted to the extension of the connecting ring and the positioning ring, and the elastic abutment ring can drive the positioning ring to adjust the position, and at the same time Due to its elastic force, the positioning ring can be reset automatically.

Compared with the prior art, the present invention has the following beneficial effects:

1. The anti-glue component has a simple structure, easy processing and good adaptability.

2. After the material is put in for a certain period of time, the outlet end of the feeder is stirred and scratched by the rotatable scraper main body in the anti-glue assembly, which can reduce the gelation and avoid physical blockage of the inner channel of the feeder; The main body of the scraper cooperates with the auxiliary scraper to prevent the material from adhering to the surface of the main body of the scraper and further reduce the chance of the material becoming glued.

3. The rotation of the main body of the scraper and the auxiliary scraper are connected to the feeder through elastic parts, which can generate a certain vibration at the outlet end of the feeder, which helps to improve the fluidity of the material at the outlet end of the feeder and prevents the material from Adhering to the inner wall of the feeder or the surface of the anti-glue component; and in the process of vibration energy transmission, it can avoid irregular pressure fluctuations when the material enters the reactor, and improve the uniformity of product quality .

4. The extension section on the connecting ring body cooperates with the locking ring and the positioning ring to improve the stability of the anti-glue assembly and avoid falling off.

Therefore, the present invention is a self-cleaning mechanism for the feeding port of a high-temperature-resistant black spandex continuous polymerization reactor with simple structure, easy processing, and low feeder wear rate, which can reduce the situation of gelling, avoid material blocking the passage, and can Improve the uniformity of product quality.

Description of drawings

Fig. 1 is the structural representation of the feeder of the high temperature resistant black spandex continuous polymerization reactor according to embodiment 1 of the present invention;

Fig. 2 is the cross-sectional structure schematic diagram of a kind of angle of feeder shown in Fig. 1;

Fig. 3 is the sectional structural representation of another angle of feeder shown in Fig. 1;

Fig. 4 is the front view of the outlet end of the feeder shown in Fig. 1;

Fig. 5 is a partial enlarged structural schematic diagram of part A in Fig. 4;

Fig. 6 is a schematic structural view of the anti-glue assembly of the feeder shown in Fig. 1;

Fig. 7 is a schematic diagram of the cooperative structure of the scraper main body and the rotating shaft in the anti-gluing assembly shown in Fig. 6;

Fig. 8 is a partially enlarged schematic diagram of part B in Fig. 7;

Fig. 9 is a schematic diagram of the cooperative structure of the scraper body and the rotating shaft in the anti-glue assembly according to Embodiment 2 of the present invention;

Figure 10 is a front view of the main body of the scraper shown in Figure 9;

Fig. 11 is a schematic structural view of a feeder for a high-temperature-resistant black spandex continuous polymerization reactor according to Example 3 of the present invention;

Fig. 12 is a schematic cross-sectional structure diagram of an angle of the feeder shown in Fig. 11;

Fig. 13 is a schematic cross-sectional structure diagram of another angle of the feeder shown in Fig. 11;

Fig. 14 is a schematic diagram of the disassembly structure of the connecting ring body, the positioning ring and the locking member in the anti-gluing assembly shown in Fig. 11;

FIG. 15 is a schematic structural diagram of the connecting ring shown in FIG. 14 .

Reference numerals: first feeding pipe 10; first feeding part 11; first feeding channel 12; second feeding tube 13; second feeding part 14; second feeding channel 15; partition 16; Scraper main body 21; step portion 211; guiding curved surface 212; rotating shaft 22; annular baffle 23; gap 231; connecting ring body 24; auxiliary scraping strip 25; spring 26; guiding short rod 27; extension section 30; annular convex Rib 31; Fastening jaw 32; First groove 33; Second bump 34; Locking ring 40; First bump 41; Rib 51; chute 52; ring body 53.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Example 1

Figures 1 to 8 schematically show the self-cleaning mechanism of the feeding port of a high-temperature-resistant black spandex continuous polymerization reactor according to an embodiment of the present invention. As shown in the figure, the reactor is provided with a tubular feeder, the feeder includes a hollow first feed pipe 10 and a second feed pipe 13, the first feed pipe 10 is sleeved on the second feed pipe 13, the inside of the first feeding tube 10 is the first feeding channel 12, and between the inner wall of the second feeding tube 13 and the outer wall of the second feeding tube 13 is the second feeding channel 15. The first feeding pipe 10 is provided with a first feeding part 11, and the first feeding part 11 communicates with the first feeding channel 12 for the feeding of the diamine mixture Anmine, and in the first feeding channel 12 A partition 16 is provided, and the partition 16 is arranged on the side of the first feeding part 11 away from the outlet end to block the reverse flow of the diamine mixture Anmine; the second feeding pipe 13 is provided with a second feeding part 14, the second The second feeding part 14 communicates with the second feeding channel 15 for feeding the prepolymer PPs.

The outlet end of the feeder is equipped with an anti-glue assembly, which includes a scraper main body 21 , a rotating shaft 22 , an annular baffle 23 and a connecting ring 24 . The scraper main body 21 and the rotating shaft 22 can be fixedly connected by means of welding, etc., and the end of the rotating shaft 22 far away from the scraper main body 21 is connected to the output end of the servo motor. In this way, the scraper main body 21 can be driven to rotate automatically through the rotating shaft 22, and the rotating shaft 22 can also drive the scraper main body 21 to move back and forth along the axis. Both the rotating shaft 22 and the annular baffle 23 are arranged inside the connecting ring body 24 , the outer wall of the annular baffle 23 is connected with the inner wall of the connecting ring body 24 , and the connecting ring body 24 is connected with the outer wall of the feeder. In some embodiments, the annular baffle 23 can be formed integrally with the connecting ring body 24 . The rotating shaft 22 is arranged inside the first feeding channel 12, the annular baffle 23 is sleeved on the outside of the rotating shaft 22, and one end of the rotating shaft 22 is connected with the scraper main body 21; the annular baffle 23 is configured with a gap 231 for Cooperate with the outlet end of the second feeding channel 15 . The annular baffle 23 is attached to the outlet end of the second feed pipe 13 for partially blocking the second feed passage 15 .

When the prepolymer PPs and the diamine mixture Anmine need to be mixed, the prepolymer PPs is injected into the second feed channel 15 through the second feeding part 14, and discharged through the gap 231 on the annular baffle 23 ; The diamine mixture Anmine is injected into the first feed channel 12 through the first feed portion 11 . The anti-glue component corresponds to the position of the outlet end of the feeder. After mixing one end for a while, the main body of the scraper is rotated by the rotating shaft 22 to stir the discharge end of the feeder to reduce the situation of gelation and prevent the material from blocking the channel. It prevents irregular pressure fluctuations during the process of materials entering the reactor, improves the uniformity of product quality, reduces the frequency of cleaning during production, and improves production efficiency.

In addition, the scraper body 21 is provided with an auxiliary scraper 25 . Specifically, one end of the auxiliary scraping strip 25 is used to abut against the scraper main body 21, the other end of the auxiliary scraping strip 25 is connected to the connecting ring body 24 through a spring 26, and the length direction of the auxiliary scraping strip 25 is connected to the connecting ring body 24. radial intersection. The inside of the connecting ring body 24 is provided with a guide short rod 27, one end of the guide short rod 27 is connected with the inner wall of the connecting ring body 24, and the other end of the guide short rod 27 extends inwardly along the direction intersecting with the radial direction, and the spring 26 is sleeved On the outside of the short guide rod 27. Through the cooperation of the spring 26 and the guide rod 27, the extension direction of the auxiliary scraper 25 can be ensured, and the elastic connection between the auxiliary scraper 25 and the outer wall of the feeder can be realized through the connecting ring 24.

The rotating shaft 22 rotates under the drive of the servo motor. During this process, the auxiliary scraper 25 can intermittently abut against the side of the rotating scraper main body 21 - move and scratch - disengage, and clean the scraper main body during this process. 21 surface to avoid adhesion of materials or jelly. One end of the auxiliary scraper 25 is elastically connected to the outer wall of the feeder through the spring 26 and the connecting ring 24, and when the rotating shaft 22 drives the scraper main body 21 to rotate, the auxiliary scraper 25 can be scratched by the action of the spring 26 Different areas on the surface of the blade main body 21 are not in contact with a certain point of the scraper main body 21 to enlarge the cleaning area. In addition, the spring 26 transmits part of the vibration energy to the outer wall of the feed pipe during the process of the auxiliary scraper 25 abutting against the scraper main body 21-moving with each other-detaching, which can improve the uniformity and fluidity of the material inside the feeder.

Further, the scraper main body 21 is a sheet-like structure, and at least a side surface of the scraper main body 21 that matches the auxiliary scraper strip 25 is a curved surface. In this way, the contact between the auxiliary scraper 25 and the side of the scraper main body 21 is facilitated, and during the contact process, the elastic member connected to the auxiliary scraper 25 is stressed unevenly, so that elastic fatigue can be avoided and the service life can be ensured. Edges on both sides of the scraper main body 21 are provided with stepped portions 211 , and the stepped portions 211 match the inner wall of the first feed channel 12 and the inner diameter of the annular baffle 23 . Thus, the stepped portion 211 on the scraper main body 21 fits closely with the inner wall of the first feed channel 12 and the inner diameter of the annular baffle 23, on the one hand, it can avoid cleaning dead angles, and on the other hand, it can also improve the annular baffle. The bonding tightness of plate 23 and the outlet end of the feeder prevents material from leaking.

Example 2

Figure 9 and Figure 10 schematically show the scraper main body 21 in the self-cleaning mechanism of the feeding port of the high temperature resistant black spandex continuous polymerization reactor according to another embodiment of the present invention, the difference from Example 1 is:

The width of the scraper body 21 gradually decreases radially from the inside to the outside, forming a sharp corner at the outer edge of the scraper body 21 . In this way, the material in the first feed channel 12 will spread less to the two ends of the scraper main body 21 during the flow through the surface of the scraper main body 21, thereby reducing its contact with the second feed channel 15. The probability of material mixing, so as to prevent gelation.

In addition, the thickness of the scraper main body 21 gradually decreases along the outlet end of the feeder in the direction away from the feeder, forming a guiding curved surface 212, which helps guide the flow of the diamine mixture Anmine and reduces the range of material splashing.

Example 3

Figures 11 to 15 schematically show the self-cleaning mechanism of the feeding port of the high-temperature-resistant black spandex continuous polymerization reactor according to another embodiment of the present invention, the difference from Example 1 is:

The side of the connecting ring 24 away from the scraper main body 21 is equipped with an extension section 30 for matching with the outer wall of the feeder; the inner wall of the extension section 30 is equipped with an annular rib 31, and the outer wall of the feeder is equipped with a ring Groove, the annular rib 31 can fit in the annular groove. The setting of the annular rib 31, on the one hand, cooperates with the ring groove to ensure the connection between the connecting ring body 24 and the outer wall of the feeder, and on the other hand, also seals the outlet end of the feeder, which can prevent the material from flowing along the connecting ring body. The extension 30 of 24 flows outwardly.

A plurality of fastening jaws 32 are disposed around the end of the extension section 30 , and a locking ring 40 is disposed on the outer wall of the feeder, and the fastening jaws 32 can be engaged in the locking ring 40 . The inner wall of the locking ring 40 is surrounded by a plurality of first protrusions 41 , and the first protrusions 41 can just be engaged between two adjacent fastening jaws 32 .

Thus, the contact area between the connecting ring body 24 and the outer wall of the feeder can be enlarged through the extension section 30, and the connection between the connecting ring body 24 and the feeder can be improved through the cooperation of the fastening jaw 32 and the locking ring 40. The tightness prevents the anti-glue components from falling off accidentally.

The outer wall of the feeder is equipped with a locating ring 50, the inwall of the locating ring 50 is threadedly matched with the outer wall of the feeder, the outer wall of the locating ring 50 fits with the inwall of the fastening jaw 32, and one end of the locating ring 50 is connected to the The inner wall of the extension section 30 abuts against, and the other end abuts against the inner wall of the locking ring 40 .

The outer wall of the positioning ring 50 is surrounded by a first rib 51 , the inner wall of the fastening jaw 32 is configured with a first groove 33 , and the first rib 51 is engaged in the first groove 33 .

Further, the outer wall of the positioning ring 50 is surrounded by a plurality of sliding grooves 52 extending along the axis, and the inner wall of the fastening jaw 32 is configured with a second protrusion 34 for matching with the sliding grooves 52 . As shown in the figure, the chute 52 is arranged as a triangle with an inclined surface, and the second protrusion 34 is arranged as a matching triangular protrusion. In this way, on the one hand, the chute 52 is convenient to cooperate with the second protrusion 34, and on the other hand On the one hand, it can also prevent the fastening jaws 32 from coming off. The positioning cooperation between the positioning ring 50 and the fastening jaw 32 is realized through the cooperation between the sliding groove 52 and the second protrusion 34 , preventing displacement, dislocation or falling off. In this embodiment, the sliding groove 52 is arranged on the first rib 51 , and in other embodiments, the sliding groove 52 can also be arranged at other positions of the positioning ring 50 . In addition, in other embodiments, the chute 52 can be arranged in an arc shape, and the inner diameter of the chute 52 can be gradually reduced along the direction close to the outlet end of the feeder. The direction of the outlet end of the feeder is gradually reduced.

In addition, the side of the positioning ring 50 close to the outlet of the feeder includes a plurality of rings 53 with increasing outer diameters, and the plurality of rings 53 are all attached to the inner wall of the fastening jaw 32 . Thus, the contact area between the positioning ring 50 and the fastening jaw 32 is further enlarged, and the connecting ring body 24 can be prevented from falling.

The interior of the locking ring 40 is provided with an escape groove 42; the interior of the escape groove 42 is provided with an elastic abutment ring 43, and the elastic abutment ring 43 is sleeved on the outer wall of the feeder, and the elastic abutment ring 43 is fitted to the end of the positioning ring 50 .

In this way, after the energy generated by the rotation of the scraper main body 21 in the anti-glue assembly and the vibration energy generated by the auxiliary scraper 25 are transmitted to the extension section 30 of the connecting ring body 24 and the positioning ring 50, the elastic abutment ring 43 can drive the positioning The position of the ring 50 is adjusted, and at the same time, due to its elastic force, the positioning ring 50 can be automatically reset.

Conventional operations in the operation steps of the present invention are well known to those skilled in the art and will not be repeated here.

The embodiments described above have described the technical solutions of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. All done within the principle scope of the present invention Any modification, supplement or substitution in a similar manner shall be included within the protection scope of the present invention.

Claims (7)

1. The self-cleaning mechanism of the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor comprises a tubular feeder, wherein a first feed channel (12) and a second feed channel (15) which are sleeved inside and outside are arranged inside the feeder; an outlet end of the feeder is provided with an anti-adhesive assembly; it is characterized in that the method comprises the steps of,

the anti-adhesive bonding assembly comprises a rotatable scraper main body (21), wherein the scraper main body (21) is provided with an auxiliary scraping strip (25), one end of the auxiliary scraping strip (25) is used for being abutted to the scraper main body (21), and the other end of the auxiliary scraping strip (25) is elastically connected with the outer wall of the feeder.

2. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 1, characterized in that,

the anti-adhesive assembly comprises a rotating shaft (22), an annular baffle (23) and a connecting ring body (24);

the rotating shaft (22) and the annular baffle (23) are arranged in the connecting ring body (24), and the connecting ring body (24) is matched with the outer wall of the feeder; the rotary shaft (22) is arranged in the first feeding channel (12), the annular baffle (23) is sleeved outside the rotary shaft (22), and one end of the rotary shaft (22) is connected with the scraper main body (21); the annular baffle (23) is provided with a notch (231) for cooperation with the outlet end of the second feed channel (15).

3. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 2, characterized in that,

the edge of the scraper main body (21) is provided with a step part (211), and the step part (211) is matched with the inner wall of the first feeding channel (12) and the inner diameter of the annular baffle plate (23).

4. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 2, characterized in that,

one end, far away from the scraping plate main body (21), of the auxiliary scraping strip (25) is connected with the connecting ring body (24) through a spring (26), and the length direction of the auxiliary scraping strip (25) is intersected with the radial direction of the connecting ring body (24).

5. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 2, characterized in that,

an extension section (30) is arranged on one side of the connecting ring body (24) away from the scraper main body (21), an annular rib (31) is arranged on the inner wall of the extension section (30), an annular groove is arranged on the outer wall of the feeder, and the annular rib (31) can be embedded in the annular groove;

the end of the extension section (30) is provided with a fastening clamping jaw (32), the outer wall of the feeder is provided with a locking ring (40), and the fastening clamping jaw (32) can be clamped inside the locking ring (40).

6. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 5, characterized in that,

the outer wall of the feeder is provided with a positioning ring (50), the inner wall of the positioning ring (50) is matched with the outer wall of the feeder, and the outer wall of the positioning ring (50) is attached to the inner wall of the fastening clamping jaw (32);

the outer wall of the positioning ring (50) is circumferentially provided with a first convex rib (51), the inner wall of the fastening clamping jaw (32) is provided with a first groove (33), and the first convex rib (51) is clamped in the first groove (33).

7. The self-cleaning mechanism for the feed inlet of the high-temperature-resistant black spandex continuous polymerization reactor according to claim 6, characterized in that,

an empty-avoiding groove (42) is arranged in the locking ring (40); the inside of keeping away empty groove (42) is provided with elasticity butt ring (43), elasticity butt ring (43) cover is established on the outer wall of feeder, and elasticity butt ring (43) with the tip laminating of holding ring (50) sets up.

Images