Para-aramid resin mixture collecting device for double-screw extruder

Abstract

The para-aramid resin mixture collecting device comprises an upper box body, the upper box body comprises an inlet fixedly connected with a discharging port of the double-screw extruder and two discharging ports located in the two sides of the lower portion of the inlet and communicated with the inlet, and the two discharging ports are each internally provided with an upper box body and a lower box body, the waste shunting baffle and the normal shunting baffle are communicated with the inlet; the foreign matter collecting box is connected with the discharging opening with the normal flow dividing baffle; and the connecting box is communicated with the discharge port with the waste shunting baffle plate and is used for receiving the normal mixture discharged by the upper box body and limiting the normal mixture to move towards the outlet direction of the connecting box. According to the device, unqualified polymers produced during abnormal production can be shunted, so that a normal mixture is prevented from being polluted.

Description

Technical Field

[0001] The present application relates to the technical field of resin processing auxiliary equipment, and in particular to a para-aramid resin mixture collecting device for a twin-screw extruder. Background Art

[0002] Poly(p-phenylene terephthalamide) (para-aramid) resin is the raw material for preparing para-aramid, a special fiber with high modulus, high strength and high temperature resistance, as well as aramid pulp with high dispersibility and high wear resistance. It can be used to produce para-aramid fiber with a specific modulus 2-3 times that of steel wire, a specific strength 5-6 times that of steel wire, and a high temperature resistance of 350°C, as well as aramid pulp, an ideal substitute for asbestos, and made into friction-resistant and high-temperature resistant insulating paper. Therefore, it is widely used in transportation, communication, aerospace, chemical industry and other fields.

[0003] At present, the synthesis of para-aramid resin in the industry is mainly synthesized by low-temperature polycondensation reaction in a twin-screw extruder. However, there are few studies on the collection device of the subsequent para-aramid resin mixture (the mixture referred to in this application is the mixed product of para-aramid resin and water). The existing resin mixture collection device for the subsequent twin-screw extruder cannot separate the unqualified polymers produced during production abnormalities when in use, causing contamination of the mixture.

[0004] Therefore, in view of the above technical problems, how to provide a mixture collection device that is easy to divert is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of the present application is to provide a para-aramid resin mixture collecting device for a twin-screw extruder, which facilitates the diversion of unqualified polymers produced when para-aramid production is abnormal to avoid contamination of normal mixtures.

[0006] To achieve the above-mentioned purpose, the present application provides a para-aramid resin mixture collecting device for a twin-screw extruder, comprising:

[0007] The upper box body comprises an inlet fixedly connected to the discharge port of the twin-screw extruder, and two discharge ports located on both sides below the inlet and connected to the inlet, wherein the two discharge ports are respectively provided with a waste diversion baffle and a normal diversion baffle movably inserted therein and used to block the communication with the inlet;

[0008] A foreign matter collection box connected to the discharge port having the normal flow diversion baffle;

[0009] The connecting box is connected to the discharge port having the waste diversion baffle, and is used for receiving the normal mixture discharged from the upper box body and limiting the normal mixture from moving toward the outlet of the connecting box.

[0010] Preferably, it further comprises a lower box body, the lower box body is located below the connection box, a first filter plate corresponding to the outlet of the connection box is arranged at the upper opening of the lower box body, and a splash shield plate extending into the interior of the lower box body is arranged on the side of the first filter plate;

[0011] Wherein, a drain plate is arranged inside the foreign matter collection box, a connecting pipe connecting the foreign matter collection box and the connecting box is arranged between the two, and the drain plate is arranged at the end of the connecting pipe located on the foreign matter collection box.

[0012] Preferably, the two discharge ports are arranged to be inclined downward, and the waste diversion baffle and the normal diversion baffle are respectively inserted into the two discharge ports at an inclined angle, and the inclination angle is 45°-90° with the horizontal plane, so that the mixture can flow completely down along the waste diversion baffle and / or the normal diversion baffle;

[0013] When either the waste diversion baffle or the normal diversion baffle is inserted into one of the discharge ports and contacts its bottom surface, the bottom edge of its upper end surface contacts the flow path surface of the other discharge port and is in the same plane, or is higher than the flow path surface of the other discharge port.

[0014] Preferably, the end of the communication pipeline located at the foreign matter collection box is higher than the end located at the connection box.

[0015] Preferably, at least two opposite first pins are provided on the lower box body, the first pins are arranged along the width direction of the lower box body and pass through the two side walls of the lower box body, the two opposite sides of the first filter plate are overlapped on the two first pins, and the other two opposite sides of the first filter plate are abutted against the two side walls of the lower box body.

[0016] Preferably, one of the two sides of the first filter plate overlapped with the first pin shaft is in contact with the side wall of the lower box body, and the splash shield is provided on the outer side of the other side, and the splash shield is opened at the upper part of the lower box body on the side facing away from the first filter plate to observe the internal situation of the lower box body.

[0017] Preferably, at least two opposite third pins are provided on the lower box body, and the third pins are located above the first pins. The side walls of the connecting box are provided with grooves that are engaged with the third pins, so that the connecting box and the upper box body can be stably placed on the lower box body.

[0018] Preferably, a second filter plate is arranged inside the lower box at a position corresponding to the first filter plate, and the second filter plate is at an angle of 20°-35° to the horizontal plane.

[0019] Preferably, a powder delivery pump is provided at the bottom of the lower box body, and the powder delivery pump delivers a portion of the mixture to a washing machine for washing, and delivers the other portion to the connecting box through a reflux pipeline, and finally flows back into the lower box body.

[0020] Preferably, the foreign matter collection box and the lower box body are made of polytetrafluoroethylene material.

[0021] Compared with the above background technology, the present application divides the material outlet into two outlets through the upper box body, corresponding to normal materials and abnormal materials respectively. The waste diversion baffle can flow the abnormal materials with production abnormalities into the foreign matter collection box, while the normal materials can enter the connection box through the normal diversion baffle. When the normal material is discharged through the outlet, the box structure of the connection box can be used to limit the overflow of the mixture, so that it can smoothly enter the lower box body; therefore, the collection device set in the above manner can divert the unqualified polymers produced during production abnormalities to avoid contaminating the normal mixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0023] FIG1 is a schematic structural diagram of a para-aramid resin mixture collecting device for a twin-screw extruder provided in an embodiment of the present application;

[0024] FIG2 is a schematic diagram of the structure of the upper box and the connection box provided in an embodiment of the present application;

[0025] FIG. 3 is a schematic diagram of the three-dimensional structure of the lower box provided in an embodiment of the present application.

[0026] In the figure: 1, upper box body 2, inlet 3, outlet 4, normal diversion baffle 5, waste diversion baffle 6, foreign matter collection box 7, connecting box 8, lower box body 9, drain plate 10, connecting pipe 11, third pin shaft 12, first pin shaft 13, reflux pipe 14, outlet 15, flushing pipe 16, second pin shaft 17, groove 18, first filter plate 19, splash guard 20, second filter plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] As shown in Figure 1, in this embodiment, a para-aramid resin mixture collecting device for a twin-screw extruder is provided, and the device includes an upper box body 1, a foreign matter collection box 6, a connecting box 7 and a lower box body 8. The upper box body 1 is fixedly connected to the discharge port 14 of the twin-screw extruder to receive the mixture discharged from the twin-screw extruder. The upper box body 1 includes an inlet 2 and two discharge ports 3. The inlet 2 is connected to the discharge port 14, and the two discharge ports 3 are located on both sides below the inlet 2 and communicated with each other, so that the mixture can be discharged through the two discharge ports 3.

[0031] It should be noted that the two discharge ports 3 are respectively provided with a waste diverter baffle 5 and a normal diverter baffle 4 which are movably inserted therein and used to block the connection with the inlet 2; please refer to Figure 1, in this embodiment, the waste diverter baffle 5 is located on the right and the normal diverter baffle 4 is located on the left. When the production is abnormal, the right waste diverter baffle 5 falls down and the left normal diverter baffle 4 is lifted up, and the abnormal polymer enters the foreign matter collection box 6; when the production is normal, the left diverter baffle falls down and the right waste diverter baffle 5 is lifted up, and the mixture enters the connecting box 7 through the flow channel and finally enters the lower box body 8; the normal diverter baffle 4 and the waste diverter baffle 5 can be pneumatically or electrically controlled according to the production situation. Pneumatic or electric control is a prior art and will not be described in detail herein.

[0032] Under this premise, the foreign matter collection box 6 is connected to the discharge port 3 with the normal diversion baffle 4 to receive abnormal polymers; the connection box 7 is connected to the discharge port 3 with the waste diversion baffle 5 to receive the normal mixture discharged from the upper box 1 and limit the normal mixture from moving toward the outlet direction of the connection box 7. In other words, since the mixture has a certain initial velocity when falling, in order to prevent the mixture from overflowing, the connection box 7 can play a certain buffering role on it and change the movement direction of the mixture so that it can smoothly enter the lower box 8.

[0033] The lower box body 8 is located below the connecting box 7 and is usually placed on the bottom surface. A first filter plate 18 corresponding to the outlet of the connecting box 7 is provided at the upper opening of the lower box body 8, which can effectively filter out block-shaped foreign matter in the mixture, and a splash-proof baffle 19 extending into the interior of the lower box body 8 is provided on the side of the first filter plate 18 to prevent the mixture from accidentally splashing out after entering the lower box body 8.

[0034] It should be pointed out that a drain plate 9 is provided inside the foreign object collection box 6, and a connecting pipe 10 connecting the foreign object collection box 6 and the connecting box 7 is provided between the two, and the drain plate 9 is arranged at the end of the connecting pipe 10 located on the foreign object collection box 6, so that the moisture inside the foreign object collection box 6 can enter the connecting box 7 and the lower box body 8 after being drained through the drain plate 9, without the need for secondary separation, thereby improving work production efficiency.

[0035] In summary of the above embodiments, the present application divides the material outlet into two discharge ports 3 through the upper box body 1, corresponding to normal materials and abnormal materials respectively, and the waste diversion baffle 5 can flow the abnormal materials with production abnormalities into the foreign matter collection box 6, while the normal materials can enter the connecting box 7 and the lower box body 8 through the normal diversion baffle 4, and filter the block foreign matter through the first filter plate 18 when entering the lower box body 8, so as to avoid the block mixture of the lower box body 8 from accumulating too much and causing overflow. When the normal material is discharged through the discharge port 3, the box structure of the connecting box 7 can be used to limit the overflow of the mixture, so that it can smoothly enter the lower box body 8; at the same time, a splash shield 19 extending into the lower box body 8 is provided on the side of the first filter plate 18, which can prevent the mixture from accidentally splashing out after entering the lower box body 8, further improving the protection effect. A drain plate 9 is provided inside the foreign matter collection box 6, and a connecting pipe 10 is provided between the foreign matter collection box 6 and the connecting box 7 to connect the two. The drain plate 9 is provided at the end of the connecting pipe 10 located on the foreign matter collection box 6, so that part of the drained water can flow back to the box below and enter the circulation system. Therefore, the collection device provided in the above manner can divert the unqualified polymer produced when the production is abnormal, and the device has the function of preventing splashing and separating the water in the foreign matter collection box 6.

[0036] In addition, in order to facilitate the mixture and abnormal polymer to fall in the discharge port 3, the two discharge ports 3 are tilted downward, and the tilt angle can meet the condition of falling by their own gravity. Similarly, the waste diversion baffle 5 and the normal diversion baffle 4 are also tilted and inserted into the two discharge ports 3, and the tilt angle is 45°-90° to the horizontal plane, preferably 60°-90°, so that the mixture or abnormal polymer can slide freely on the diversion baffle until it flows down completely.

[0037] It is worth noting that in order to make the materials discharged from the flow channel corresponding to each discharge port 3 purer, when either the waste diversion baffle 5 or the normal diversion baffle 4 is inserted into a discharge port 3 and contacts its bottom surface, the bottom edge of its upper end surface contacts the flow channel surface of another discharge port 3 and is in the same plane, or is higher than the flow channel surface of another discharge port 3. Taking the waste diversion baffle 5 as an example, when the waste diversion baffle 5 is inserted into the bottom of the discharge port 3, the normal diversion channel is closed, and the abnormal polymer will enter the foreign matter collection box 6 through another diversion channel. If the waste diversion baffle 5 is lower than the flow channel surface of the waste diversion channel, the flow channel surface of the waste diversion channel will form a step structure with the waste diversion baffle 5, so that more abnormal polymers will be hidden at the step structure. When normal diversion is performed, after the waste diversion baffle 5 is lifted, the hidden part of the abnormal polymer is easy to enter the normal diversion channel, resulting in a certain error in the material discharged from the discharge port 3, affecting the production quality.

[0038] In addition, the end of the connecting pipe 10 located at the foreign matter collecting box 6 is higher than the end located at the connecting box 7 , so that water can flow to the connecting box 7 and the lower box body 8 .

[0039] Please refer to Figures 1 and 3. At least two opposite first pins 12 are arranged on the lower box 8. The first pins 12 are arranged along the width direction of the lower box 8 and penetrate the two side walls of the lower box 8. The two opposite sides of the first filter plate 18 overlap on the two first pins 12 for easy disassembly and assembly. The other two opposite sides of the first filter plate 18 abut against the two side walls of the lower box 8. At this time, the two opposite sides of the first filter plate 18 can use the two side walls of the lower box 8 as splash-proof devices; and one of the two side edges of the first filter plate 18 overlapped with the first pins 12 abuts against the side wall of the lower box 8. At this time, the three sides of the first filter plate 18 all use the side wall of the lower box 8 as splash-proof devices, and a splash-proof baffle 19 is arranged outside the last side edge, so as to prevent splashing of the four side edges of the first filter plate 18, effectively preventing the mixture from accidentally splashing when entering the lower box 8.

[0040] The splash shield 19 is open at the top of the lower box 8 on the side away from the first filter plate 18, see FIG3 , through which the interior of the lower box 8 can be observed. Of course, a transparent glass or a transparent plastic plate can be added at the opening to further prevent the mixture in the lower box 8 from accidentally splashing out without affecting the observation.

[0041] 3, the upper end of the splash shield 19 is provided with a second pin 16 overlapped with the side wall of the lower box 8, which is convenient for disassembly and installation. A depression corresponding to the second pin 16 can also be provided on the side wall of the lower box 8, thereby limiting the position of the splash shield 19 and improving the stability of the splash shield 19 when placed.

[0042] In addition, at least two opposite third pins 11 are provided on the lower box body 8, and the third pins 11 are located above the first pins 12. The side wall of the connecting box 7 is provided with a groove 17 engaged with the third pins 11, please refer to Figure 2, so that the connecting box 7 and the upper box body 1 are stably placed on the lower box body 8. It should be noted that since the upper box body 1 is fixedly connected to the extruder, and the connecting box 7 is fixedly connected to the upper box body 1, 11 only needs to ensure that the connecting box 7 can be placed in place and has a certain supporting effect, and no more restrictions are made here.

[0043] It should be noted that the number of the first pin shaft 12 and the third pin shaft 11 can be set according to actual conditions and can be greater than two, and no further restrictions are made here.

[0044] A second filter plate 20 is arranged inside the lower box 8 and at a position corresponding to the first filter plate 18. The second filter plate 20 is 20°-35° with the horizontal plane and can be movably disassembled and cleaned to prevent small pieces of polymer from entering the powder delivery pump and causing production abnormalities.

[0045] The powder delivery pump is arranged at the bottom of the lower box 8, and the powder delivery pump delivers a portion of the mixture to the washing machine for washing, and the other portion is delivered to the connecting box 7 through the reflux pipeline 13, and finally refluxes to the lower box 8, so that the powder is mixed more evenly and fully. In addition, a flushing pipeline 15 is also arranged on the discharge port 14, which can flush down the polymer produced by the twin-screw extruder and improve the collection efficiency. The foreign matter collection box 6 and the lower box 8 of the present application are made of polytetrafluoroethylene material, which is resistant to acid corrosion.

[0046] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0047] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A para-aramid resin mixture collecting device for a twin-screw extruder, characterized in that: include: The upper box body comprises an inlet fixedly connected to the discharge port of the twin-screw extruder, and two discharge ports located on both sides below the inlet and connected to the inlet, wherein the two discharge ports are respectively provided with a waste diversion baffle and a normal diversion baffle movably inserted therein and used to block the communication with the inlet; A foreign matter collection box connected to the discharge port having the normal flow diversion baffle; The connecting box is connected to the discharge port having the waste diversion baffle, and is used for receiving the normal mixture discharged from the upper box body and limiting the normal mixture from moving toward the outlet of the connecting box.

2. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 1, characterized in that: It also includes a lower box body, the lower box body is located below the connection box, a first filter plate corresponding to the outlet of the connection box is arranged at the upper opening of the lower box body, and a splash shield plate extending into the interior of the lower box body is arranged on the side of the first filter plate; Wherein, a drain plate is arranged inside the foreign matter collection box, a connecting pipe connecting the foreign matter collection box and the connecting box is arranged between the two, and the drain plate is arranged at the end of the connecting pipe located on the foreign matter collection box.

3. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 2, characterized in that: The two discharge ports are arranged to be tilted downward, and the waste diversion baffle and the normal diversion baffle are respectively inserted into the two discharge ports at a tilted angle, and the tilted angle is 45°-90° with the horizontal plane, so that the mixture can flow completely down along the waste diversion baffle and / or the normal diversion baffle; When either the waste diversion baffle or the normal diversion baffle is inserted into one of the discharge ports and contacts its bottom surface, the bottom edge of its upper end surface contacts the flow path surface of the other discharge port and is in the same plane, or is higher than the flow path surface of the other discharge port.

4. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 2, characterized in that: The end of the communication pipeline located at the foreign matter collection box is higher than the end located at the connection box.

5. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 2, characterized in that: At least two opposite first pins are arranged on the lower box body, and the first pins are arranged along the width direction of the lower box body and pass through the two side walls of the lower box body. The two opposite sides of the first filter plate are overlapped on the two first pins, and the other two opposite sides of the first filter plate are abutted against the two side walls of the lower box body.

6. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 5, characterized in that: The first filter plate overlaps the two sides of the first pin, one of which is in contact with the side wall of the lower box, and the splash shield is arranged on the outer side of the other side, and the splash shield is opened at the upper part of the lower box on the side away from the first filter plate to observe the internal situation of the lower box.

7. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 5, characterized in that: At least two opposite third pins are arranged on the lower box body, and the third pins are located above the first pins. The side wall of the connecting box is provided with grooves engaged with the third pins, so that the connecting box and the upper box body can be stably placed on the lower box body.

8. The para-aramid resin mixture collecting device for a twin-screw extruder according to claim 2, characterized in that: A second filter plate is arranged inside the lower box at a position corresponding to the first filter plate, and the second filter plate is at an angle of 20°-35° with the horizontal plane.

9. The para-aramid resin mixture collecting device for a twin-screw extruder according to any one of claims 2 to 8, characterized in that: A powder delivery pump is provided at the bottom of the lower box body, and the powder delivery pump delivers a portion of the mixture to a washing machine for washing, and delivers the other portion to the connecting box through a reflux pipeline, and finally flows back into the lower box body.

10. The para-aramid resin mixture collecting device for a twin-screw extruder according to any one of claims 2 to 8, characterized in that: The foreign matter collecting box and the lower box body are made of polytetrafluoroethylene material.

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