Prepolymer melt filtering device

Abstract

The invention provides a prepolymer melt filtering device and relates to a filtering device, the prepolymer melt filtering device comprises a vertical cavity and at least two layers of filtering units located in the vertical cavity, each layer of filtering unit comprises a rotary drum set, a partition plate set and a filtering drum set which are sequentially distributed from top to bottom, and a melt inlet is formed in the top end of the vertical cavity; the melt inlet is vertically aligned to one side of the rotary drum set, the partition plate set comprises two partition plate bodies which face the rotary drum set and are distributed in a flaring shape, the top ends of the two partition plate bodies are hinged to the interior of the vertical cavity, and the two partition plate bodies are pushed by the jacking set so that arc-shaped holding claws at the bottom ends of the two partition plate bodies can abut against and be connected to the bottom side of the filter drum set in a holding mode; according to the invention, a filtering and grading structure is adopted, impurities can be automatically cleaned in time, the purpose of avoiding blockage is achieved, the filtering efficiency is improved, and meanwhile, the production cost during filtering can be reduced due to reasonable combination of the structure.

Description

Technical Field

[0001] The invention relates to a filtering device, in particular to a prepolymer melt filtering device. Background Art

[0002] In the plastics, rubber and other industries, prepolymer melts often contain impurities or incompletely reacted monomers, and efficient filtering devices are required to improve product quality. In practical applications, existing prepolymer melt filtration devices generally suffer from low filtration efficiency due to clogging of the filter medium, especially when filtering high-temperature viscous melts, due to the deposition of impurities, too low flow rate or too high resistance, which in turn affects the continuity and stability of filtration. Therefore, how to reduce clogging and improve filtration effect by improving the fluidity of the fluid has become a technical problem;

[0003] Based on this, a patent for a melt filter element that can prevent clogging (publication number CN211585535U) uses the filter element in a rotating state to improve the filtration efficiency and reduce clogging. However, although centrifugal force can slow down the clogging, as the production continues for a long time, the accumulation of impurities cannot be cleaned up in a timely and effective manner, which will still reduce the filtration efficiency, and the shutdown for cleaning is also time-consuming and labor-intensive, and the production cost of driving the filter element to rotate and filter all the time is also high. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a prepolymer melt filtration device, which adopts a filtering and grading structure and can automatically clean impurities in time to avoid blockage and improve the filtration efficiency. At the same time, the reasonable structural combination can also reduce the production cost during filtration.

[0005] The present invention provides the following technical solutions:

[0006] A prepolymer melt filtering device comprises a vertical cavity and at least two layers of filtering units located in the vertical cavity, each layer of filtering units comprises a drum group, a baffle group and a filter drum group which are sequentially distributed from top to bottom, a melt inlet is arranged at the top of the vertical cavity, and the melt inlet is vertically aligned on one side of the drum group so that the entering melt drives the drum group to rotate around the center, so that the rotating drum group driven by fluid can provide power for subsequent driving, so as to save driving cost;

[0007] The partition group includes two groups of partition bodies that are distributed in an expanded shape toward the rotating drum group. The top ends of the two groups of partition bodies are hingedly installed in the vertical cavity, and are pushed by the top pressure group so that the arc-shaped claws at the bottom ends thereof abut against and embrace the bottom side of the filter drum group. Both ends of the partition body and the filter drum group abut against the inner wall of the vertical cavity, which is used to separate the vertical cavity into a pre-discharge chamber located on the upper layer and a post-discharge chamber located on the lower layer. The post-discharge chamber of each layer of filter unit is connected with the pre-discharge chamber of the filter unit of the next layer, and the filter drum group of each layer of filter unit is vertically aligned with the filter drum group of the next layer. One side of the unit's rotating drum group is so that the melt transitioning between the two layers of filter units drives the rotating drum group of the next layer of filter units to rotate around the center. At this point, the fluid-driven rotating drum group can provide power for the drive of each layer to save driving costs. Also, because the top end of the partition body is hingedly installed in the vertical cavity, and its bottom end is pushed by the top pressure group to embrace the outside of the filter drum group, when it is necessary to transition the melt between the two layers of filter units, it is only necessary to adjust the top pressure group to make the partition body rotate backwards to achieve a passing gap between the bottom end of the partition body and the filter drum group.

[0008] Preferably, the filter cartridge group includes a cylindrical filter screen plate and mounting tubes connected to both ends of the filter screen plate, the mounting tube is connected to the inner tube of the filter screen plate, and is installed in the vertical cavity, and the mounting tube at one end is connected to the level outlet through a rotating joint, and the mounting tube at the other end is sealed and connected to a rotating shaft, and a driven pulley is connected to the rotating shaft, and the driven pulley is driven to rotate by the rotating drum group through a belt. At this point, when the rotating drum group is driven to rotate by the incoming melt, one end of the rotating drum group can drive the filter cartridge group to rotate through the cooperation of the driving pulley, the belt, and the driven pulley. At this time, centrifugal force can be provided for filtration without electric drive to avoid The filtrate entering the filter screen plate from the pre-discharge chamber can be filtered out through the rotary joint at one end. When the filtration efficiency is reduced after long-term use, the top pressure group can be adjusted to create a gap between the partition body and the filter screen plate, so that the melt in the pre-discharge chamber with too many impurities can fall into the filter unit of the next layer through the gap. Moreover, since the arc-shaped claws at the bottom end of the partition body are abutted and embraced on the bottom side of the filter cartridge group, when the filter cartridge group rotates, the joints between the arc-shaped claws and the arc surface and the plane of the partition body can also act as scrapers to scrape off impurities adhering to the outside of the filter cartridge group when the filter cartridge group rotates.

[0009] Preferably, the drum group includes a central drum installed in a vertical cavity and a plurality of groups of blades evenly arranged around the central drum. The melt inlet is vertically aligned on one side of the central drum so that the incoming melt falls onto the blades to drive the blades and the central drum to rotate. One end of the central drum extends out of the vertical cavity and is connected to a driving pulley. The driving pulley is driven and connected to the driven pulley through a belt, and the inner wall of the vertical cavity abuts against both ends of the central drum and the blades to separate the vertical chamber into a working chamber facing the filter drum group and a feed chamber facing away from the filter drum group, so as to ensure that the melt entering from the melt inlet can be pressed on the blades as much as possible to provide power for the rotation of the blades.

[0010] Preferably, it also includes a controller and an alarm. A liquid level sensor for detecting the liquid level of the melt in the pre-discharge chamber is also provided on the partition body. The liquid level sensor is arranged flush with the bottom position of the blade rotation. When the melt level in the pre-discharge chamber submerges the liquid level sensor, the controller triggers the alarm to remind the operator to observe the liquid level to adjust the top pressure group to avoid excessive melt in the pre-discharge chamber causing a rotation burden on the drum group. At this time, the filtering unit of the next layer acts as a secondary filtration effect to improve the filtering efficiency.

[0011] Preferably, the pushing group is a pushing rod, which is threadedly connected to the vertical cavity, and one end of the pushing rod extending into the vertical cavity is pressed against the back side of the partition body. This structure is set for manual operation, which can reduce the cost of the structure, and the human operation is not frequent, so the labor cost is not high.

[0012] Preferably, the pushing group is a pushing cylinder, which is installed on the vertical cavity, and its driving end extends into the vertical cavity to press against the back side of the partition body, and the pushing cylinder is electrically connected to the controller. When the controller triggers the alarm, the pushing cylinder is also synchronously driven to make the pushing rod of the pushing cylinder move away from the partition body, and the partition body rotates under gravity to create a gap between the bottom end of the partition body and the filter cartridge group.

[0013] Preferably, a heating tube group is also installed in the partition body, so that the melt entering the pre-release chamber can be kept in a heated and molten state.

[0014] Preferably, the bottom end of the vertical cavity is an inclined surface inclined toward the slag discharge port, and a filter plate driven to rotate by a motor is provided on the inner side of the slag discharge port. When the motor drives the filter plate to seal at the slag discharge port, it is used to filter the bottom layer of the vertical cavity. When the motor drives the filter plate to rotate along the inner wall of the vertical cavity to separate from the slag discharge port, it is convenient to discharge slag from the slag discharge port.

[0015] The beneficial effects of the present invention are as follows: the prepolymer melt filtering device provided by the present invention adopts a filtering and grading structure, which can automatically clean impurities in time to avoid clogging and improve filtering efficiency. At the same time, the reasonable structural combination can also reduce the production cost during filtering, and the rotating drum group driven by fluid can provide power for the drive of each layer to save driving costs. At the same time, because the top of the partition body is hingedly installed in the vertical cavity, and the top pressure group pushes so that the bottom end is connected to the outside of the filter drum group, when the melt needs to be transferred between the two layers of filtering units, it is only necessary to adjust the top pressure group to make the partition body rotate backwards to achieve a passing gap between the bottom end of the partition body and the filter drum group.

[0016] When the rotating drum group is driven to rotate by the incoming melt, one end of the rotating drum group can drive the filter drum group to rotate through the cooperation of the active pulley, the belt and the driven pulley. At this time, centrifugal force can be provided for filtration without electric drive to avoid blockage and improve the filtration efficiency. The filtrate entering the filter screen plate drum from the pre-discharge chamber can be filtered out through the rotating joint at one end. When the filtration efficiency is reduced after long-term use, the top pressure group can be adjusted to make a gap between the partition body and the filter screen plate, so that the melt in the pre-discharge chamber with too many impurities can fall into the filter unit of the next layer through the gap. Moreover, since the arc-shaped claws at the bottom end of the partition body are abutted and embraced on the bottom side of the filter drum group, when the filter drum group rotates, the connection between the arc-shaped claws and the arc surface and the plane of the partition body can also act as a scraper to scrape off the impurities adhering to the outside of the filter drum group when the filter drum group rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural cross-sectional view of the present invention;

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle and upper filter units;

[0020] Figure 3 is a side view of the drum assembly;

[0021] Figure 4 is a side view of the filter cartridge group;

[0022] Markings in the figure:

[0023] 1. Vertical chamber; 2. Rotating drum group; 3. Partition group; 4. Filter drum group; 5. Melt inlet; 6. Top pressure group; 7. Pre-discharge chamber; 8. Post-discharge chamber; 9. Liquid level sensor; 10. Heating tube group; 11. Inclined surface; 12. Slag discharge port; 13. Motor; 14. Filter plate; 21. Center rotating drum; 22. Blades; 23. Active pulley; 31. Partition body; 32. Arc claws; 41. Filter screen plate; 42. Mounting tube; 43. Rotating joint; 44. Rotating shaft; 45. Driven pulley. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figure 1-4 As shown, a prepolymer melt filtering device, in this embodiment, comprises a vertical chamber 1 and two layers of filtering units located in the vertical chamber 1, each layer of filtering units comprises a drum group 2, a baffle group 3 and a filter drum group 4 which are sequentially distributed from top to bottom, a melt inlet 5 is provided at the top of the vertical chamber 1, and the melt inlet 5 is vertically aligned to one side of the drum group 2, so that the entering melt drives the drum group 2 to rotate around the center, so that the rotating drum group 2 driven by fluid can provide power for subsequent driving, so as to save driving cost;

[0026] The partition group 3 includes two groups of partition bodies 31 distributed in an expanded shape toward the rotating drum group 2. The top ends of the two groups of partition bodies 31 are installed in the vertical cavity 1 through pin shaft transfer, and are pushed by the top pressure group 6 so that the arc-shaped claws 32 at the bottom ends thereof abut against and embrace the bottom side of the filter drum group 4. Both ends of the partition body 31 and the filter drum group 4 abut against the inner wall of the vertical cavity 1, and are used to separate the vertical cavity 1 into a pre-discharge chamber 7 located on the upper layer and a post-discharge chamber 8 located on the lower layer, and the post-discharge chamber 8 of each layer of the filter unit is connected with the pre-discharge chamber 7 of the filter unit of the next layer, and the filter drum group 4 of each layer of the filter unit is vertically aligned with the filter drum group 4 of the next layer. One side of the rotary drum group 2 of the filter unit is so that the melt transitioning between the two layers of filter units drives the rotary drum group 2 of the next layer of filter unit to rotate around the center. At this point, the fluid-driven rotating drum group 2 can provide power for the drive of each layer to save driving costs. Also, because the top end of the partition body 31 is hingedly installed in the vertical cavity 1, and is pushed by the top pressure group 6 so that its bottom end is embraced outside the filter drum group 4, when it is necessary to transition the melt between the two layers of filter units, it is only necessary to adjust the top pressure group 6 to make the partition body 31 rotate backwards, so as to achieve a passing gap between the bottom end of the partition body 31 and the filter drum group 4.

[0027] The filter cartridge group 4 includes a cylindrical filter screen plate 41 and a mounting tube 42 connected to both ends of the filter screen plate 41. The mounting tube 42 is connected to the inner tube of the filter screen plate 41, and is installed in the vertical chamber 1. The mounting tube 42 at one end is connected to the level outlet through a rotating joint 43, and the mounting tube 42 at the other end is sealed and connected to a rotating shaft 44. A driven pulley 45 is connected to the rotating shaft 44, and the driven pulley 45 is driven to rotate by the rotating drum group 2 through a belt. At this point, when the rotating drum group 2 is driven to rotate by the incoming melt, one end of the rotating drum group 2 can drive the filter cartridge group 4 to rotate through the cooperation of the driving pulley 23, the belt, and the driven pulley 45. At this time, no electric drive is required to provide centrifugal force for filtration to avoid clogging. The filter efficiency is improved, and the filtrate entering the filter screen plate 41 from the pre-discharge chamber 7 can be filtered out through the rotary joint 43 at one end. When the filtration efficiency is reduced after long-term use, the top pressure group 6 can be adjusted to form a gap between the partition body 31 and the filter screen plate 41, so that the melt in the pre-discharge chamber 7 with too many impurities can fall into the filter unit of the next layer through the gap. Moreover, since the arc-shaped claws 32 at the bottom end of the partition body 31 are abutted and embraced on the bottom side of the filter cartridge group 4, when the filter cartridge group 4 rotates, the connection between the arc-shaped claws 32 and the arc surface and the plane of the partition body 31 can also act as a scraper, so as to scrape off the impurities adhering to the outside of the filter cartridge group 4 when the filter cartridge group rotates.

[0028] The drum group 2 includes a central drum 21 installed in the vertical cavity 1 and a plurality of blades 22 uniformly arranged around the central drum 21. The melt inlet 5 is vertically aligned with one side of the central drum 21 so that the incoming melt falls onto the blades 22 to drive the blades 22 and the central drum 21 to rotate. One end of the central drum 21 extends out of the vertical cavity 1 and is connected to a driving pulley 23. The driving pulley 23 is driven and connected to a driven pulley 45 through a belt, and the inner wall of the vertical cavity 1 abuts against both ends of the central drum 21 and the blades 22, so that the vertical chamber is divided into a working chamber facing the filter drum group 4 and a feeding chamber facing away from the filter drum group 4, so as to ensure that the melt entering from the melt inlet 5 can be pressed on the blades 22 as much as possible to provide power for the rotation of the blades 22.

[0029] Example 2

[0030] like Figure 1-3As shown, a prepolymer melt filtering device, in this embodiment, is further limited based on embodiment 1, wherein it also includes a controller and an alarm, and a liquid level sensor 9 for detecting the liquid level of the melt in the pre-discharge chamber 7 is also provided on the partition body 31, and the liquid level sensor 9 is arranged at the same level as the bottom position of the rotation of the blade 22. When the melt level in the pre-discharge chamber 7 submerges the liquid level sensor 9, the controller triggers the alarm to remind the operator to observe the liquid level to adjust the top pressure group 6 to avoid excessive melt in the pre-discharge chamber 7 causing a rotation burden on the drum group 2. At this time, the filtering unit of the next layer acts as a secondary filtering effect to improve the filtering efficiency.

[0031] The pushing group 6 is a pushing cylinder, which is installed on the vertical cavity 1. The driving end thereof extends into the vertical cavity 1 and is pressed against the back side of the partition body 31. The pushing cylinder is electrically connected to the controller. When the controller triggers the alarm, the pushing cylinder is also synchronously driven, so that the pushing rod of the pushing cylinder moves away from the partition body 31. The partition body 31 rotates under gravity so that a gap appears between the bottom end of the partition body 31 and the filter cartridge group 4.

[0032] Example 3

[0033] like Figure 1-3 As shown, a prepolymer melt filtration device, in this embodiment, different from Example 2, the push group 6 is a push rod, the push rod is threadedly connected in the vertical cavity 1, and the end thereof extending into the vertical cavity 1 is pressed against the back side of the partition body 31. This structure is set for manual operation, which can reduce the cost of the structure, and the operation by personnel is not frequent, so the labor cost is not high.

[0034] A heating tube group 10 is also installed in the partition body 31 so that the melt entering the pre-leakage chamber 7 can be kept in a heated and molten state.

[0035] The bottom end of the vertical cavity 1 is an inclined surface 11 inclined toward the slag discharge port 12. A filter plate 14 driven to rotate by a motor 13 is arranged on the inner side of the slag discharge port 12. When the motor 13 drives the filter plate 14 to seal at the slag discharge port 12, it is used to filter the bottom layer of the vertical cavity 1. When the motor 13 drives the filter plate 14 to rotate along the inner wall of the vertical cavity 1 to separate from the slag discharge port 12, it is convenient to discharge slag from the slag discharge port 12.

[0036] The working principle of the present invention is as follows: a prepolymer melt filtering device provided by the present invention adopts a filtering and grading structure, which can automatically clean impurities in time to avoid clogging and improve filtering efficiency. At the same time, the reasonable structural combination can also reduce the production cost during filtering, and the rotating drum group 2 driven by fluid can provide power for the drive of each layer to save driving cost. At the same time, because the top end of the partition body 31 is hingedly installed in the vertical cavity 1, and is pushed by the top pressure group 6 so that its bottom end is connected to the outside of the filter drum group 4, when it is necessary to transfer the melt between the two layers of filtering units, it is only necessary to adjust the top pressure group 6 so that the partition body 31 rotates in the opposite direction to achieve a passing gap between the bottom end of the partition body 31 and the filter drum group 4.

[0037] When the rotating drum group 2 is driven to rotate by the incoming melt, one end of the rotating drum group 2 can drive the filter drum group 4 to rotate through the cooperation of the active pulley 23, the belt, and the driven pulley 45. At this time, centrifugal force can be provided for filtration without electric drive to avoid blockage and improve the filtration efficiency. The filtrate entering the filter screen plate 41 from the pre-discharge chamber 7 can be filtered out through the rotary joint 43 at one end. When the filtration efficiency is reduced after long-term use, the top pressure group 6 can be adjusted to make a gap between the partition body 31 and the filter screen plate 41, so that the melt in the pre-discharge chamber 7 with too many impurities can fall into the filter unit of the next layer through this gap. In addition, since the arc-shaped claws 32 at the bottom end of the partition body 31 are against and embraced on the bottom side of the filter drum group 4, when the filter drum group 4 rotates, the connection between the arc-shaped claws 32 and the arc surface and the plane of the partition body 31 can also act as a scraper to scrape off the impurities adhered to the outside of the filter drum group 4 when the filter drum group rotates.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prepolymer melt filtration device, characterized in that: The invention comprises a vertical chamber (1) and at least two layers of filter units located in the vertical chamber (1), each layer of the filter units comprising a rotating drum group (2), a baffle group (3) and a filter drum group (4) which are sequentially arranged from top to bottom, a melt inlet (5) is arranged at the top of the vertical chamber (1), the melt inlet (5) is vertically aligned on one side of the rotating drum group (2) so that the entering melt drives the rotating drum group (2) to rotate around the center, the baffle group (3) comprises two groups of baffle bodies (31) which are arranged in an expanded shape toward the rotating drum group (2), the top ends of the two groups of baffle bodies (31) are hingedly installed in the vertical chamber (1), and are pushed by a top pressure group (6) so that the arc-shaped bottom ends thereof are The claws (32) abut against and embrace the bottom side of the filter cartridge group (4), and both ends of the partition body (31) and the filter cartridge group (4) abut against the inner wall of the vertical cavity (1), so as to separate the vertical cavity (1) into a pre-discharge chamber (7) located at the upper layer and a post-discharge chamber (8) located at the lower layer, and the post-discharge chamber (8) of each layer of filter units is connected with the pre-discharge chamber (7) of the filter unit of the next layer, and the filter cartridge group (4) of each layer of filter units is vertically aligned with one side of the rotating drum group (2) of the filter unit of the next layer, so that the melt transitioning between the two layers of filter units drives the rotating drum group (2) of the filter unit of the next layer to rotate around the center.

2. A prepolymer melt filtration device according to claim 1, characterized in that: The filter cartridge group (4) comprises a cylindrical filter screen plate (41) and mounting tubes (42) connected to both ends of the filter screen plate (41); the mounting tube (42) is connected to the inner cylinder of the filter screen plate (41) and is installed in the vertical chamber (1); the mounting tube (42) at one end is connected to the level outlet via a rotary joint (43); the mounting tube (42) at the other end is sealed and connected to a rotating shaft (44); a driven pulley (45) is connected to the rotating shaft (44); the driven pulley (45) is driven to rotate by the rotating cartridge group (2) via a belt.

3. A prepolymer melt filtration device according to claim 2, characterized in that: The drum assembly (2) comprises a central drum (21) installed in a vertical cavity (1) and a plurality of blades (22) uniformly arranged around the central drum (21). The melt inlet (5) is vertically aligned with one side of the central drum (21) so that the incoming melt falls onto the blades (22) to drive the blades (22) and the central drum (21) to rotate. One end of the central drum (21) extends out of the vertical cavity (1) and is connected to a driving pulley (23). The driving pulley (23) is connected to the driven pulley (45) through a belt. The inner wall of the vertical cavity (1) abuts against both ends of the central drum (21) and the blades (22) so that the vertical cavity is divided into a working chamber facing the filter drum assembly (4) and a feeding chamber facing away from the filter drum assembly (4).

4. A prepolymer melt filtration device according to claim 3, characterized in that: It also includes a controller and an alarm. The partition body (31) is also provided with a liquid level sensor (9) for detecting the liquid level of the melt in the pre-leakage chamber (7). The liquid level sensor (9) is arranged flush with the bottom end position of the blade (22) when rotating. When the melt level in the pre-leakage chamber (7) submerges the liquid level sensor (9), the controller triggers the alarm to sound an alarm.

5. A prepolymer melt filtration device according to claim 3 or 4, characterized in that: The push group (6) is a push rod, which is threadedly connected to the vertical cavity (1), and one end of the push rod that extends into the vertical cavity (1) is pressed against the back side of the partition body (31).

6. A prepolymer melt filtration device according to claim 4, characterized in that: The pushing group (6) is a pushing cylinder, which is installed on the vertical cavity (1). The driving end of the pushing cylinder extends into the vertical cavity (1) to press against the back side of the partition body (31). The pushing cylinder is electrically connected to the controller. When the controller triggers the alarm, the pushing cylinder is also synchronously driven to make the pushing rod of the pushing cylinder move away from the partition body (31). The partition body (31) rotates under gravity so that a gap appears between the bottom end of the partition body (31) and the filter cartridge group (4).

7. A prepolymer melt filtration device according to claim 3, 4 or 6, characterized in that: A heating tube group (10) is also installed in the partition body (31).

8. A prepolymer melt filtration device according to claim 1, characterized in that: The bottom end of the vertical cavity (1) is an inclined surface (11) inclined toward a slag discharge port (12). A filter plate (14) driven to rotate by a motor (13) is arranged on the inner side of the slag discharge port (12). When the motor (13) drives the filter plate (14) to seal at the slag discharge port (12), it is used to filter the bottom layer of the vertical cavity (1). When the motor (13) drives the filter plate (14) to rotate along the inner wall of the vertical cavity (1) to separate from the slag discharge port (12), it is convenient to discharge slag from the slag discharge port (12).

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