A plastic powder gas purification device for plastic shell processing

Abstract

The present invention discloses a plastic powder gas purification device for processing plastic shells, which relates to the technical field of purification devices and comprises a cylinder, an air inlet pipe is provided at the bottom of the cylinder, an exhaust pipe is provided on one side of the top of the cylinder, a filter liquid is injected into the cylinder, a drain pipe is provided on the side wall of the cylinder, and a purification component for filtering the plastic powder gas is provided inside the cylinder. The plastic powder gas purification device for processing plastic shells effectively reduces the impurity content in the plastic powder gas through dual filtration of the filter liquid and the gas filter. The filter liquid first captures most of the particulate matter, and the gas filter further filters to ensure high cleanliness of the gas. The movable design of the mounting frame and the gas filter, as well as the rotary cleaning of the cleaning rod, effectively prevents the accumulation of particulate matter on the gas filter. At the same time, the vibration function of the gas filter further improves the cleaning effect, reduces clogging and water stains, and ensures continuous filtration efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of purification devices, in particular to a plastic powder gas purification device for processing plastic shells. Background Art

[0002] In the process of plastic shell processing, the purification of plastic powder gas is a crucial link. With the rapid development of the plastic products industry, the purification requirements for plastic powder gas used in plastic shell processing are becoming increasingly higher. At present, there are some plastic powder gas purification devices for plastic shell processing on the market. These devices have met the production needs to a certain extent, but there are still some defects that cannot be ignored.

[0003] Defects of the existing technology:

[0004] Low filtration efficiency: Although existing plastic powder gas purification devices use a combination of filtering liquid and gas filter, in actual application, the filtration efficiency is still low. Because large bubbles are generated when the gas passes through the filtering liquid, the gas cannot fully contact the filtering liquid, so the filtering liquid can only filter out some plastic particles. In addition, the gas filter is prone to clogging after long-term use, affecting the filtration efficiency.

[0005] Imperfect cleaning mechanism: Although some devices are equipped with a cleaning mechanism, the cleaning effect is not ideal. The cleaning mechanism can often only clean some particles on the surface of the gas filter, but is powerless against particles that penetrate deep into the gas filter. This not only affects the continuous filtering effect of the gas filter, but also shortens the service life of the gas filter. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a plastic powder gas purification device for plastic shell processing, which solves the technical problems mentioned in the background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a plastic powder gas purification device for plastic shell processing, comprising a cylinder, an air inlet pipe is provided at the bottom of the cylinder, an exhaust pipe is provided on one side of the top of the cylinder, a filtered liquid is injected into the cylinder, the outlet of the air inlet pipe extends into the interior of the cylinder and is located below the liquid level of the filtered liquid, a drain pipe is provided on the side wall of the cylinder and is located above the liquid level of the filtered liquid, the other end of the drain pipe is connected to an annular frame through a pump body, and a purification component for filtering the plastic powder gas is provided inside the cylinder;

[0008] The purification component is fixedly installed on the servo motor on the top of the cylinder, and the output end of the servo motor is fixedly connected to a reciprocating screw. The bottom end of the reciprocating screw is rotatably connected to a positioning frame fixedly installed on the inner wall of the cylinder. The reciprocating screw is threadedly connected to a mounting frame, and the mounting frame is slidably installed in the cylinder in the vertical direction. The bottom of the mounting frame is fixedly connected to a gas filter for filtering plastic powder gas.

[0009] As a further optimization of this technical solution, a sliding groove is provided on the side wall of the reciprocating screw rod, and the reciprocating screw rod is slidingly connected to a sliding sleeve and a sleeve rod through the sliding groove. A first damping spring is provided between the sleeve rod and the sliding sleeve and is sleeved on the reciprocating screw rod, and a cleaning rod is fixedly connected to the side wall of the sliding sleeve.

[0010] As a further preferred embodiment of the present technical solution, wedge blocks are provided around the bottom of the gas filter, and a protrusion that is adapted to the wedge blocks is provided at the end of the cleaning rod.

[0011] As a further preferred embodiment of the present technical solution, the bottom end of the sleeve rod is rotatably connected to a connecting plate, and the connecting plate is slidably mounted on the positioning frame in the vertical direction, and a third damping spring mounted on the reciprocating screw rod is provided between the connecting plate and the positioning frame.

[0012] As a further optimization of the present technical solution, a toggle plate is rotatably connected to both sides of the outer wall of the sleeve rod, the other end of the toggle plate slides in contact with the inner wall of the cylinder, and the upper end of the toggle plate is higher than the liquid level of the filtered liquid, a fixing ring is fixedly connected to the connecting plate, the fixing ring and the sleeve rod are on the same axis, and the toggle plate is slidably installed on the fixing ring, a second damping spring is provided on the outer wall of the fixing ring, and both ends of the second damping spring are fixedly connected to the toggle plate, and limit blocks are provided on both sides of the surface of the connecting plate, and the limit blocks are located at the inner end of the toggle plate.

[0013] As a further optimization of the present technical solution, a sliding block is slidably connected to the positioning frame, a pulley is provided on the top of the sliding block, connecting rods are rotatably connected on both sides of the sliding block, and the other end of the connecting rod is slidably installed on the toggle plate through the axle seat, and a fixed plate is fixedly connected to the bottom of the gas filter, and an inclined surface and a straight surface are provided at the bottom of the fixed plate, and the pulley is slidably connected to the inclined surface and the straight surface.

[0014] As a further optimization of the present technical solution, an annular frame is provided on the top of the cylinder; a liquid filter screen is provided in the annular frame, a suction pump is fixedly installed on the side wall of the cylinder, a one-way liquid inlet valve pipe is provided at the input end of the suction pump, and the other end of the one-way liquid inlet valve pipe is connected to the bottom of the cylinder, a one-way liquid outlet valve pipe is provided at the output end of the suction pump, and the other end of the one-way liquid outlet valve pipe is connected to the annular frame, and a delivery pipe is also connected between the annular frame and the cylinder, and the pipe mouth at one end of the delivery pipe is located above the liquid level of the filtered liquid in the cylinder.

[0015] As a further preferred embodiment of the present technical solution, connecting rods are fixedly connected to both ends of the outer wall of the reciprocating screw, and a scraper is fixedly connected to the other end of the connecting rod, and the scraper is in contact with the surface of the liquid filter screen.

[0016] As a further optimization of the present technical solution, a drop-out port is further provided on the liquid filter net, and the drop-out port is located as a whole on the side of the liquid filter net away from the one-way liquid outlet valve tube; a collection box is also installed on the annular frame, and the collection box is a container with a top opening, and the top opening of the collection box is located below the drop-out port.

[0017] Compared with the existing technology, it has the following beneficial effects:

[0018] The double filtration of the filtering liquid and the gas filter effectively reduces the impurity content in the plastic powder gas. The filtering liquid first captures most of the particles, and the gas filter further filters to ensure high gas cleanliness. The movable design of the mounting frame and gas filter, as well as the rotating cleaning of the cleaning rod, effectively prevents the accumulation of particles on the gas filter. At the same time, the vibration function of the gas filter further improves the cleaning effect, reduces clogging and water stains, and ensures continuous filtration efficiency.

[0019] Through the linkage mechanism of the toggle plate and the sliding block, intelligent management of the filtered liquid is achieved. When the gas filter drives the fixed plate to move downward, the toggle plate folds into the liquid, effectively stirring and driving the plastic particles to move toward the drain pipe, ensuring the cleanliness of the filtered liquid and reducing the frequency of replacement. The combined use of the pump body and the liquid filter realizes the circulating filtration of the filtered liquid containing plastic particles. The rotation of the scraper not only cleans the liquid filter, but also pushes the filtered solids to the drop port for collection, realizing the effective recycling of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic plan view of the internal structure of the cylinder in the present invention;

[0022] Figure 3 It is a structural diagram of the cylinder and purification component in the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the mounting frame, gas filter, cleaning rod, toggle plate, fixed plate, and sliding block in the present invention;

[0024] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0025] Figure 6This is a schematic diagram of the disassembly of the structure of the reciprocating screw, the mounting frame, and the gas filter in the present invention;

[0026] Figure 7 It is a structural diagram of the sleeve rod, the toggle plate, the sliding block and the positioning frame in the present invention;

[0027] Figure 8 It is a structural diagram of the cylinder, annular frame, liquid filter screen, scraper and collection box in the present invention.

[0028] Figure: 1, cylinder; 2, air inlet pipe; 3, exhaust pipe; 4, purification assembly; 41, servo motor; 42, reciprocating screw; 43, mounting bracket; 44, gas filter; 45, slide; 46, sliding sleeve; 47, cleaning rod; 48, wedge; 49, bump; 410, first damping spring; 411, positioning bracket; 412, sleeve; 413, fixing plate; 414, inclined surface; 415, straight surface; 416, toggle plate; 417 , connecting plate; 418, fixing ring; 419, second damping spring; 420, sliding block; 421, connecting rod; 422, third damping spring; 423, annular frame; 424, liquid filter; 425, connecting rod; 426, scraper; 427, drop port; 428, collecting box; 429, delivery pipe; 430, suction pump; 431, one-way liquid inlet valve pipe; 432, one-way liquid outlet valve pipe; 433, discharge pipe; 434, limit block. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Combination Figures 1-8As shown, the present invention provides a technical solution: a plastic powder gas purification device for plastic shell processing, comprising a cylinder 1, an air inlet pipe 2 is provided at the bottom of the cylinder 1, the outlet of the air inlet pipe 2 extends to the interior of the cylinder 1, and this outlet is located below the liquid level of the filtered liquid to ensure that the gas can be pre-treated by the filtered liquid before entering the cylinder 1, an exhaust pipe 3 is provided on one side of the top of the cylinder 1 for discharging the filtered gas, filtered liquid is injected into the cylinder 1 to further purify the gas entering through the air inlet pipe 2, a drain pipe 433 is provided on the side wall of the cylinder 1, the drain pipe 433 is located above the liquid level of the filtered liquid, and is used to discharge the filtered liquid, the other end of the drain pipe 433 can be connected to the annular frame 423 through a pump body to ensure the recycling of the filtered liquid, the end of the drain pipe 433 is located above the liquid filter 424, and the liquid filter 424 is used to further filter impurities in the liquid to ensure the cleanliness of the filtered liquid;

[0031] The cylinder 1 is provided with a purification component 4 for filtering the plastic powder gas. The purification component 4 is fixedly mounted on a servo motor 41 at the top of the cylinder 1. The output end of the servo motor 41 is fixedly connected to a reciprocating screw 42. The bottom end of the reciprocating screw 42 is rotatably connected to a positioning frame 411 fixedly mounted on the inner wall of the cylinder 1. The reciprocating screw 42 is threadedly connected to a mounting frame 43. The mounting frame 43 is slidably mounted in the cylinder 1 in the vertical direction to achieve up and down movement. The bottom of the mounting frame 43 is fixedly connected to a gas filter 44 for filtering the plastic powder gas. By turning on the servo motor 41, the reciprocating screw 42 is driven to rotate synchronously, and the reciprocating screw 42 is driven The movable mounting frame 43 and the gas filter 44 are located in the cylinder 1 and move up and down, so that the gas filter 44 filters the plastic powder gas. The mounting frame 43 can move back and forth along the length direction of the cylinder 1 and submerge the gas filter 44 in the filtering liquid. On the one hand, the particles intercepted by the gas filter 44 will be brought into the filtering liquid during the downward movement of the gas filter 44, thereby processing the particles accumulated at the gas filter 44. On the other hand, the gas filter 44 can also be cleaned with the help of the filtering liquid, ensuring the relative cleanliness of the surface of the gas filter 44 and improving the continuous filtering effect of the gas filter 44 on the dust-laden gas.

[0032] The reciprocating screw rod 42 is provided with a sliding groove 45 on the side wall, and the reciprocating screw rod 42 is slidably connected to the sliding sleeve 46 and the sleeve rod 412 through the sliding groove 45. A first damping spring 410 is provided between the sleeve rod 412 and the sliding sleeve 46, which is sleeved on the reciprocating screw rod 42. The side wall of the sliding sleeve 46 is fixedly connected to the cleaning rod 47. Under the elastic action of the first damping spring 410, the sliding sleeve 46 and the cleaning rod 47 are pushed upward, so that the position of the cleaning rod 47 corresponds to the position of the gas filter 44. When the reciprocating screw rod 42 rotates, the sliding sleeve 46 and the cleaning rod 47 rotate synchronously, so that the rotating cleaning rod 47 can achieve continuous rotation and clean the surface of the gas filter 44, reducing the blockage of plastic particles and improving the filtering effect of the gas filter 44. On the other hand, when the gas filter 44 is located in the filtered liquid, due to the intervention of the liquid, the rotation of the cleaning rod 47 can also brush the surface of the gas filter 44, ensuring that the gas filter 44 is relatively clean and achieving the effect of continuous gas filtering;

[0033] Wedges 48 are provided around the bottom of the gas filter 44, and a protrusion 49 is provided at the end of the cleaning rod 47 that is adapted to the wedge 48. On the basis of the cleaning rod 47 rotating with the reciprocating screw 42, the protrusion 49 can rotate synchronously with the cleaning rod 47. After the protrusion 49 contacts the wedge 48, the protrusion 49 and the cleaning rod 47 as a whole will overcome the elastic force of the first damping spring 410 and move downward. After the protrusion 49 passes through the wedge 48, the first damping spring 410 resets and pushes the cleaning rod 47 and the protrusion 49 to move up quickly. At this time, the protrusion 49 after passing through the wedge 48 will quickly collide with the surface of the gas filter 44, causing the gas to The body filter 44 vibrates, and the vibration of the gas filter 44 can shake off impurities attached to the mesh surface, thereby improving the gas filtering effect of the gas filter 44 on the gas. Secondly, during the squeezing contact between the protrusion 49 and the wedge block 48, the bristles of the cleaning rod 47 can temporarily break away from the gas filter 44, so that some impurities between the bristles and the gas filter 44 can fall off, ensuring the cleaning effect of the cleaning rod 47 on the gas filter 44. Finally, the vibration can also shake off water stains on the surface of the gas filter 44 after washing, reducing the situation where the gas filter 44 is excessively wet and seriously sticky, thereby ensuring the efficiency of gas filtration.

[0034] The bottom end of the sleeve rod 412 is connected to the connecting plate 417 by rotation, and the connecting plate 417 is slidably installed on the positioning frame 411 in the vertical direction. A third damping spring 422 is provided between the connecting plate 417 and the positioning frame 411, which is sleeved on the reciprocating screw rod 42 to provide an additional damping effect. The outer wall of the sleeve rod 412 is rotatably connected to the toggle plate 416 on both sides. The other end of the toggle plate 416 slides in contact with the inner wall of the cylinder 1 to ensure that the toggle plate 416 can operate smoothly. It is worth noting that the upper end of the toggle plate 416 is higher than the liquid level of the filtered liquid, which can prevent the liquid from entering the mechanical part of the toggle plate 416. A fixing ring 418 is fixedly connected to the connecting plate 417, and the fixing ring 418 is connected to the sleeve rod. 412 are at the same axis, which ensures the stability of the structure. The toggle plate 416 is slidably installed on the fixed ring 418, and the outer wall of the fixed ring 418 is provided with a second damping spring 419. The two ends of the second damping spring 419 are fixedly connected to the toggle plate 416, providing a damping force for the movement of the toggle plate 416. Limit blocks 434 are provided on both sides of the surface of the connecting plate 417. The limit blocks 434 are located at the inner end of the toggle plate 416 to ensure that the toggle plate 416 moves within a specific range. A sliding block 420 is slidably connected to the positioning frame 411. A pulley is provided on the top of the sliding block 420. The pulley is in sliding connection with the inclined surface 414 and the straight surface 415, so that the gas filter 44 can drive the sliding sleeve 46 to move downward when it moves downward. Then, the first damping spring 410 is compressed. Under the elastic action of the first damping spring 410, the sleeve rod 412, the toggle plate 416, and the connecting plate 417 are pushed downward, and the third damping spring 422 is compressed, so that the upper end of the toggle plate 416 moves below the liquid surface of the filtered liquid. The gas filter 44 can drive the fixed plate 413 to move downward synchronously. Since the inclined surface 414 and the straight surface 415 slide in contact with the pulley, the fixed plate 413 pushes the sliding block 420 to slide to one side on the positioning frame 411. The sliding block 420 drives the two toggle plates 416 to rotate on the sleeve rod 412 through the connecting rod 421, and compresses the second damping spring 419, so that the two toggle plates 416 move to one side of the connecting rod 421 to fold. When sliding on the inclined surface 414, the two toggle plates 416 are folded and move downward, so that the toggle plates 416 move below the liquid level of the filtered liquid. At this time, the pulley moves from the inclined surface 414 to the position of the straight surface 415. When the mounting bracket 43, the gas filter 44, and the fixed plate 413 move upward, under the elastic force of the third damping spring 422 and the first damping spring 410, the connecting plate 417, the sleeve rod 412, and the toggle plates 416 move upward. When the two toggle plates 416 move above the liquid level of the filtered liquid, the pulley moves from the straight surface 415 to the inclined surface 414, and the elastic force of the second damping spring 419 pushes the two toggle plates 416 to rotate to the other side until they contact the limit block 434.At this time, the two toggle plates 416 are unfolded from a folded state above the liquid level of the filtered liquid. At this time, the two toggle plates 416 can drive the plastic particles located at the liquid level of the filtered liquid to move toward the side of the drain pipe 433. Due to the action of the toggle plates 416, the liquid level of the filtered liquid can be made higher than the drain pipe 433. At this time, the filtered liquid containing plastic particles is discharged through the drain pipe 433 to ensure the relative cleanliness of the filtered liquid, reduce the frequency of replacing the filtered liquid, and improve the filtering effect of the filtered liquid on the plastic powder gas. Then, the pump body transports the filtered liquid containing plastic particles into the annular frame 423, and then filters it through the liquid filter mesh 424. The plastic particles generated by the filtration are scraped into the drop port 427 by the scraper 426 and enter the collection box 428 for collection and treatment.

[0035] The top of the cylinder 1 is provided with an annular frame 423; a liquid filter screen 424 is provided in the annular frame 423, a suction pump 430 is fixedly installed on the side wall of the cylinder 1, a one-way liquid inlet valve pipe 431 is provided at the input end of the suction pump 430, and the other end of the one-way liquid inlet valve pipe 431 is connected to the bottom of the cylinder 1, a one-way liquid outlet valve pipe 432 is provided at the output end of the suction pump 430, and the other end of the one-way liquid outlet valve pipe 432 is connected to the annular frame 423, and a conveying line is also connected between the annular frame 423 and the cylinder 1. The pipe 429 has one end opening located above the liquid level of the filtered liquid in the cylinder 1. During operation, the suction pump 430 is turned on to draw in the mixed liquid containing sediment at the bottom of the cylinder 1 through the one-way liquid inlet valve pipe 431. The drawn mixed liquid is then discharged from the one-way liquid outlet valve pipe 432. The discharged mixed liquid falls on the liquid filter 424 to be filtered. The filtered liquid then falls inside the annular frame 423 and flows into the cylinder 1 through the delivery pipe 429.

[0036] Connecting rods 425 are fixedly connected at both ends of the outer wall of the reciprocating screw 42, and a scraper 426 is fixedly connected to the other end of the connecting rod 425, and the scraper 426 is in contact with the surface of the liquid filter 424; when the reciprocating screw 42 rotates, the rotation can also drive the scraper 426 to rotate through the connecting rod 425. During the rotation of the reciprocating screw 42, the scraper 426 can scrape away solid matter on the liquid filter 424 below the one-way liquid outlet valve pipe 432, thereby ensuring the speed at which the liquid output from the one-way liquid outlet valve pipe 432 falls through the liquid filter 424, thereby improving the effect of liquid circulation filtration and further improving the effect of liquid circulation filtration.

[0037] A drop port 427 is also provided on the liquid filter 424, and the drop port 427 is located as a whole on the side of the liquid filter 424 away from the one-way liquid outlet valve tube 432; a collecting box 428 is also installed on the annular frame 423, and the collecting box 428 is a container with a top opening, and the top opening of the collecting box 428 is located below the drop port 427; in the process of the scraper 426 rotating with the reciprocating screw 42, the scraper 426 can scrape away the solid matter on the liquid filter 424, and the scraper 426 can push the solid matter to move on the liquid filter 424, and the continuous rotation of the scraper 426 can push the solid matter on the liquid filter 424 to the drop port 427, so that the solid matter falls from the drop port 427 to the collecting box 428 for storage. Therefore, the rotation of the scraper 426 can not only clean the surface of the liquid filter 424, but also push the filtered solid matter to the drop port 427 for collection.

[0038] In an embodiment of the present invention, when processing plastic powder gas, we first introduce the unfiltered gas into the cylinder 1 through the air inlet pipe 2. After the gas enters the cylinder, it will first pass through the filter liquid. The particulate matter in the gas contacts the filter liquid, and the adhesion characteristics of the filter liquid are used to capture plastic particles and impurities. These particles will float on the surface of the filter liquid, thereby reducing the impurity content in the plastic powder gas after filtration. At the same time, the impurities will form suspended matter or sediment in the filter liquid, completing the first filtration of the gas. Next, the gas that has passed the first filtration will pass through the gas filter 44 in the process of moving toward the air inlet pipe 2. The gas filter 44 performs a second filtration on the plastic powder gas. Since large bubbles will be generated when the gas passes through the filter liquid, the gas will The body cannot fully contact with the filtered liquid, so the filtered liquid can only filter out some plastic particles, which requires a second filtration to further reduce the particulate matter in the gas. Finally, the mounting bracket 43 can reciprocate along the length direction of the cylinder 1 to ensure that the gas filter 44 is always submerged in the filtered liquid. The gas filter 44 is made of washable material, which is a well-known technology and will not be described in detail. On the one hand, the particulate matter intercepted by the gas filter 44 will be brought into the filtered liquid during the downward movement of the gas filter 44, thereby processing the particulate matter accumulated at the gas filter 44; on the other hand, the filtered liquid can also clean the gas filter 44 to ensure that its surface is relatively clean, thereby improving the effect of the gas filter 44 on continuous filtering of dust-laden gas.

[0039] When the reciprocating screw 42 rotates, it drives the sliding sleeve 46 and the cleaning rod 47 to rotate synchronously, so that the rotating cleaning rod 47 can continuously rotate and clean the surface of the gas filter 44, reducing the blockage of plastic particles, thereby improving the filtering effect of the gas filter 44. On the other hand, when the gas filter 44 is located in the filtering liquid, the intervention of the liquid enables the rotation of the cleaning rod 47 to scrub the surface of the gas filter 44, ensuring that the gas filter 44 is relatively clean and achieving the effect of continuous gas filtration.

[0040] On the basis of the rotation of the cleaning rod 47 with the reciprocating screw 42, the protrusion 49 can rotate synchronously with the cleaning rod 47. When the protrusion 49 contacts the wedge 48, the protrusion 49 and the cleaning rod 47 as a whole will overcome the elastic force of the first damping spring 410 and move downward. When the protrusion 49 passes through the wedge 48, the first damping spring 410 resets and pushes the cleaning rod 47 and the protrusion 49 to move upward quickly. At this time, the protrusion 49 after passing the wedge 48 will quickly collide with the surface of the gas filter 44, causing the gas filter 44 to vibrate. The vibration of the gas filter 44 can The attached impurities are shaken off, thereby improving the filtering effect of the gas filter 44 on the gas. Secondly, during the squeezing contact between the protrusion 49 and the wedge block 48, the bristles of the cleaning rod 47 can be temporarily separated from the gas filter 44, so that some impurities between the bristles and the gas filter 44 can fall off, ensuring the cleaning effect of the cleaning rod 47 on the gas filter 44. Finally, the vibration can also shake off the water stains on the surface of the gas filter 44 after washing, reducing the situation where the gas filter 44 is excessively wet and seriously sticky, thereby ensuring the efficiency of gas filtration.

[0041] In the process of the mounting bracket 43 and the gas filter 44 moving downward, the sliding sleeve 46 can be driven to move downward, so that the sliding sleeve 46 compresses the first damping spring 410. Under the elastic action of the first damping spring 410, the sleeve rod 412, the toggle plate 416, and the connecting plate 417 are pushed downward and the third damping spring 422 is compressed. In this way, the upper end of the toggle plate 416 moves below the liquid level of the filtered liquid, and the gas filter 44 can drive the fixed plate 413 to move downward synchronously. Since the inclined surface 414 and the straight surface 415 slide in contact with the pulley, the fixed plate 413 pushes the sliding block 420 to move in a fixed position. The sliding block 420 drives the two toggle plates 416 to rotate on the sleeve rod 412 through the connecting rod 421, and compresses the second damping spring 419. In this way, the two toggle plates 416 move to the side of the connecting rod 421 to fold. When the pulley slides on the inclined surface 414, the two toggle plates 416 fold and move downward to below the liquid level of the filtered liquid. At this time, the pulley moves from the inclined surface 414 to the position of the straight surface 415. When the mounting frame 43, the gas filter 44 and the fixed plate 413 move upward, Under the elastic force of the three damping springs 422 and the first damping spring 410, the connecting plate 417, the sleeve rod 412, and the toggle plate 416 move upward. When the two toggle plates 416 move above the liquid level of the filtered liquid, the pulley moves from the straight surface 415 to the inclined surface 414, and the elastic force of the second damping spring 419 pushes the two toggle plates 416 to rotate to the other side until they contact the limit block 434. Since the two toggle plates 416 are now unfolded from a state that is higher than the liquid level of the filtered liquid and folded, the two toggle plates 416 can drive the plastic particles located on the liquid level of the filtered liquid. The particles move toward the side of the drain pipe 433, and due to the action of the toggle plate 416, the liquid level of the filtered liquid can be made higher than the drain pipe 433. At this time, the filtered liquid containing plastic particles is discharged through the drain pipe 433 to ensure the relative cleanliness of the filtered liquid, reduce the frequency of replacing the filtered liquid, and improve the filtering effect of the filtered liquid on the plastic powder gas. Then the pump body transports the filtered liquid containing plastic particles into the annular frame 423, and then filters it through the liquid filter mesh 424. The plastic particles generated by the filtration are scraped into the drop port 427 by the scraper 426 and enter the collection box 428 for collection and processing;

[0042] In addition, by turning on the suction pump 430, the mixed liquid containing sediment at the bottom of the cylinder 1 is sucked in through the one-way liquid inlet valve pipe 431, and the sucked mixed liquid is discharged from the one-way liquid outlet valve pipe 432. The output mixed liquid can fall on the liquid filter screen 424 to be filtered, and the filtered liquid can fall inside the annular frame 423 and flow into the cylinder 1 through the delivery pipe 429. When the reciprocating screw rod 42 rotates, the rotation can also drive the scraper 426 to rotate through the connecting rod 425. During the rotation of the reciprocating screw rod 42, the scraper 426 can remove the liquid below the one-way liquid outlet valve pipe 432. The solid matter on the liquid filter 424 is scraped away, and the scraper 426 can push the solid matter to move on the liquid filter 424. The continuous rotation of the scraper 426 can push the solid matter on the liquid filter 424 to the drop port 427, so that the solid matter falls from the drop port 427 to the collection box 428 for storage. Therefore, the rotation of the scraper 426 can not only clean the surface of the liquid filter 424, but also push the filtered solid matter to the drop port 427 for collection, thereby ensuring the speed at which the liquid output by the one-way liquid outlet pipe 432 falls through the liquid filter 424, thereby improving the effect of liquid circulation filtration.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plastic powder gas purification device for processing plastic shells, comprising a cylinder (1), an air inlet pipe (2) provided at the bottom of the cylinder (1), an exhaust pipe (3) provided on one side of the top of the cylinder (1), a filtered liquid injected into the cylinder (1), an outlet of the air inlet pipe (2) extending into the interior of the cylinder (1), and the outlet being located below the liquid level of the filtered liquid, characterized in that: A liquid discharge pipe (433) is provided on the side wall of the cylinder (1), and the liquid discharge pipe (433) is located above the liquid surface of the filtered liquid. The other end of the liquid discharge pipe (433) is connected to the annular frame (423) through the pump body. A purification component (4) for filtering the plastic powder gas is provided inside the cylinder (1). The purification component (4) is fixedly mounted on a servo motor (41) at the top of the cylinder (1), the output end of the servo motor (41) is fixedly connected to a reciprocating screw (42), the bottom end of the reciprocating screw (42) is rotatably connected to a positioning frame (411) fixedly mounted on the inner wall of the cylinder (1), the reciprocating screw (42) is threadedly connected to a mounting frame (43), and the mounting frame (43) is slidably mounted in the cylinder (1) in the vertical direction, and a gas filter (44) for filtering plastic powder gas is fixedly connected to the bottom of the mounting frame (43); A sliding groove (45) is provided on the side wall of the reciprocating screw rod (42); the reciprocating screw rod (42) is slidably connected to a sliding sleeve (46) and a sleeve rod (412) through the sliding groove (45); a first damping spring (410) sleeved on the reciprocating screw rod (42) is provided between the sleeve rod (412) and the sliding sleeve (46); and a cleaning rod (47) is fixedly connected to the side wall of the sliding sleeve (46); Wedges (48) are provided around the bottom of the gas filter (44), and a protrusion (49) adapted to fit the wedges (48) is provided at the end of the cleaning rod (47); The bottom end of the sleeve rod (412) is rotatably connected to a connecting plate (417), and the connecting plate (417) is slidably mounted on the positioning frame (411) in the vertical direction. A third damping spring (422) sleeved on the reciprocating screw rod (42) is provided between the connecting plate (417) and the positioning frame (411); The outer wall of the sleeve rod (412) is rotatably connected to a toggle plate (416), the other end of the toggle plate (416) slides in contact with the inner wall of the cylinder (1), and the upper end of the toggle plate (416) is higher than the level of the filtered liquid. A fixing ring (418) is fixedly connected to the connecting plate (417), the fixing ring (418) and the sleeve rod (412) are coaxially located, and the toggle plate (416) is slidably mounted on the fixing ring (418). A second damping spring (419) is sleeved on the outer wall of the fixing ring (418), and both ends of the second damping spring (419) are fixedly connected to the toggle plate (416). Limiting blocks (434) are provided on both sides of the surface of the connecting plate (417), and the limiting blocks (434) are located at the inner end of the toggle plate (416).

2. The plastic powder gas purification device for plastic shell processing according to claim 1, characterized in that: A sliding block (420) is slidably connected to the positioning frame (411), a pulley is provided on the top of the sliding block (420), and connecting rods (421) are rotatably connected on both sides of the sliding block (420). The other end of the connecting rod (421) is slidably mounted on the toggle plate (416) through an axle seat in a vertical direction. The bottom of the gas filter (44) is fixedly connected to a fixed plate (413), and the bottom of the fixed plate (413) is provided with an inclined surface (414) and a straight surface (415), and the pulley is slidably connected to the inclined surface (414) and the straight surface (415).

3. The plastic powder gas purification device for plastic shell processing according to claim 2, characterized in that: An annular frame (423) is provided on the top of the cylinder (1); a liquid filter screen (424) is provided in the annular frame (423); a suction pump (430) is fixedly installed on the side wall of the cylinder (1); a one-way liquid inlet valve pipe (431) is provided at the input end of the suction pump (430), and the other end of the one-way liquid inlet valve pipe (431) is connected to the bottom of the cylinder (1); a one-way liquid outlet valve pipe (432) is provided at the output end of the suction pump (430), and the other end of the one-way liquid outlet valve pipe (432) is connected to the annular frame (423); a delivery pipe (429) is further connected between the annular frame (423) and the cylinder (1); and an end of the delivery pipe (429) is located above the liquid level of the filtered liquid in the cylinder (1).

4. The plastic powder gas purification device for plastic shell processing according to claim 3, characterized in that: Connecting rods (425) are fixedly connected to both ends of the outer wall of the reciprocating screw rod (42), and a scraper (426) is fixedly connected to the other end of the connecting rod (425), and the scraper (426) is in contact with the surface of the liquid filter screen (424).

5. The plastic powder gas purification device for plastic shell processing according to claim 4, characterized in that: The liquid filter (424) is also provided with a drop opening (427), and the drop opening (427) is located on the side of the liquid filter (424) away from the one-way liquid outlet valve tube (432); a collection box (428) is also installed on the annular frame (423), and the collection box (428) is a container with a top opening, and the top opening of the collection box (428) is located below the drop opening (427).

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