Plastic powder gas purification device for plastic shell processing

Abstract

The invention discloses a plastic powder gas purification device for plastic shell processing, and relates to the technical field of purification devices.The plastic powder gas purification device comprises a barrel, a gas inlet pipe is arranged at the bottom of the barrel, an exhaust pipe is arranged on one side of the top of the barrel, filtering liquid is injected into the barrel, and a liquid drainage pipe is arranged on the side wall of the barrel; and a purification assembly for filtering plastic powder gas is arranged in the cylinder body. According to the plastic powder gas purification device for plastic shell processing, through double filtration of the filter liquid and the gas filter screen, the impurity content in plastic powder gas is effectively reduced, the filter liquid firstly captures most particulate matter, and the gas filter screen further filters the particulate matter, so that high cleanliness of the gas is ensured; through the movable design of the mounting rack and the gas filter screen and the rotary cleaning of the cleaning rod, the accumulation of particulate matters on the gas filter screen is effectively prevented, and meanwhile, the vibration function of the gas filter screen further improves the cleaning effect, reduces the problems of blockage and water stain, and ensures the continuous filtering efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of purification devices, in particular to a plastic powder gas purification device for plastic shell processing. 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 getting higher and higher. At present, there are some plastic powder gas purification devices for plastic shell processing on the market. These devices meet the production needs to a certain extent, but there are still some defects that cannot be ignored;

[0003] Defects of the prior art:

[0004] Low filtration efficiency: Although the existing plastic powder gas purification device adopts a combination of filtering liquid and gas filter, in actual application, the filtration efficiency is still low. Since large bubbles are generated when the gas passes through the filtering liquid, the gas cannot fully contact with 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 arranged at the bottom of the cylinder, an exhaust pipe is arranged at one side of the top of the cylinder, a filter liquid is injected into the cylinder, the outlet of the air inlet pipe extends to the inside of the cylinder, and the outlet is located below the liquid level of the filter liquid, a liquid discharge pipe is arranged on the side wall of the cylinder, and the liquid discharge pipe is located above the liquid level of the filter liquid, the other end of the liquid discharge pipe is connected to the annular frame through a pump body, and a purification component for filtering the plastic powder gas is arranged 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 rod, the bottom end of the reciprocating screw rod is rotatably connected to a positioning frame fixedly installed on the inner wall of the cylinder, the reciprocating screw rod is threadedly connected to a mounting frame, and the mounting frame is slidably installed in the cylinder in a vertical direction, and a gas filter screen for filtering plastic powder gas is fixedly connected to the bottom of the mounting frame.

[0009] As a further preferred embodiment of the present technical solution, a sliding groove is provided on the side wall of the reciprocating screw, and the reciprocating screw is slidably connected with a sliding sleeve and a sleeve rod through the sliding groove. A first damping spring sleeved on the reciprocating screw is provided between the sleeve rod and the sliding sleeve, 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 arranged around the bottom of the gas filter screen, and a protrusion that matches the wedge blocks is arranged at the end of the cleaning rod.

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

[0012] As a further preferred embodiment 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 sleeved on the outer wall of the fixing ring, and both ends of the second damping spring are fixedly connected to the toggle plate, limit blocks are arranged 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 preferred embodiment of the present technical solution, a sliding block is slidably connected to the positioning frame, a pulley is arranged on the top of the sliding block, connecting rods are rotatably connected on both sides of the sliding block, the other end of the connecting rods is slidably installed on the toggle plate through an axle seat in the vertical direction, a fixed plate is fixedly connected to the bottom of the gas filter, an inclined surface and a straight surface are arranged 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 preferred embodiment 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 tube is provided at the input end of the suction pump, and the other end of the one-way liquid inlet valve tube is connected to the bottom of the cylinder, a one-way liquid outlet valve tube is provided at the output end of the suction pump, and the other end of the one-way liquid outlet valve tube is connected to the annular frame, a delivery pipe is also connected between the annular frame and the cylinder, and an orifice 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, 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 port is also provided on the liquid filter net, and the drop port is located as a whole on the side of the liquid filter net away from the one-way liquid outlet valve tube; a collecting box is also installed on the annular frame, the collecting box is a container with a top opening, and the top opening of the collecting box is located below the drop port.

[0017] Compared with the prior art, 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 the 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 blockage 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 discharge 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, thereby 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 schematic diagram of the cylinder and the purification component in the present invention;

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

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

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

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

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

[0028] In the figure: 1, cylinder; 2, air inlet pipe; 3, exhaust pipe; 4, purification component; 41, servo motor; 42, reciprocating screw rod; 43, mounting frame; 44, gas filter; 45, slide groove; 46, sliding sleeve; 47, cleaning rod; 48, wedge block; 49, bump; 410, first damping spring; 411, positioning frame; 412, sleeve rod; 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 drawings of the specification. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Embodiment 1: Combination Figure 1-Figure 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 arranged at the bottom of the cylinder 1, the outlet of the air inlet pipe 2 extends to the inside of the cylinder 1, and the 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 arranged on one side of the top of the cylinder 1 for discharging the filtered gas, the cylinder 1 is injected with filtered liquid to further purify the gas entering through the air inlet pipe 2, a drain pipe 433 is arranged 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] A purification component 4 for filtering the plastic powder gas is arranged inside the cylinder 1. The purification component 4 is fixedly mounted on a servo motor 41 at the top of the cylinder 1. A reciprocating screw rod 42 is fixedly connected to the output end of the servo motor 41. The bottom end of the reciprocating screw rod 42 is rotatably connected to a positioning frame 411 fixedly mounted on the inner wall of the cylinder 1. A mounting frame 43 is threadedly connected to the reciprocating screw rod 42. The mounting frame 43 is slidably mounted in the cylinder 1 in the vertical direction to achieve up and down movement. A gas filter screen 44 for filtering the plastic powder gas is fixedly connected to the bottom of the mounting frame 43. The reciprocating screw rod 42 is driven to rotate synchronously by turning on the servo motor 41, and the reciprocating screw rod 42 is driven to rotate synchronously. 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 the gas filter 44 is submerged 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, so as to achieve the treatment of 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 to ensure the relative cleanliness of the surface of the gas filter 44, thereby improving the continuous filtering effect of the gas filter 44 on the dust-containing gas;

[0032] A sliding groove 45 is provided on the side wall of the reciprocating screw rod 42, and the reciprocating screw rod 42 is slidably connected with 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. A cleaning rod 47 is fixedly connected to the side wall of the sliding sleeve 46. Under the elastic force of the first damping spring 410, the sliding sleeve 46 and the cleaning rod 47 are pushed to move 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 are driven to rotate synchronously, so that the rotating cleaning rod 47 can realize continuous rotation and clean the surface of the gas filter 44, reduce the blockage of plastic particles, and improve the filtering effect of the gas filter 44. On the other hand, when the gas filter 44 is located in the filtering liquid, due to the intervention of the liquid, the rotation of the cleaning rod 47 can also scrub the surface of the gas filter 44, ensure that the gas filter 44 is relatively clean, and achieve the effect of continuous gas filtering;

[0033] Wedge blocks 48 are arranged around the bottom of the gas filter 44, and a protrusion 49 that is adapted to the wedge block 48 is arranged at the end of the cleaning rod 47. On the basis that the cleaning rod 47 rotates with the reciprocating screw rod 42, the protrusion 49 can rotate synchronously with the cleaning rod 47. After the protrusion 49 contacts the wedge block 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 block 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 block 48 will quickly collide with the surface of the gas filter 44, so that the gas The body filter 44 vibrates, and the vibration of the gas filter 44 can shake off the impurities attached to the mesh surface, 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, thereby ensuring the cleaning effect of the cleaning rod 47 on the gas filter 44. Finally, the water stains on the surface of the gas filter 44 after washing can be shaken off by vibration, thereby 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 sleeved on the reciprocating screw rod 42 is provided between the connecting plate 417 and the positioning frame 411 to provide an additional damping effect. The outer wall of the sleeve rod 412 is rotatably connected with a 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 and 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 to provide 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 side 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, and a pulley is provided on the top of the sliding block 420. The pulley is slidably connected 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, 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 located on the positioning frame 411 to slide to one side. The sliding block 420 drives the two toggle plates 416 located on the sleeve rod 412 to rotate 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, and the two toggle plates 416 are folded at the pulley position. When sliding on the inclined surface 414, the two toggle plates 416 are folded, and as they move downward, the toggle plates 416 move below the liquid surface 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 screen 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 plate 416 move upward. When the two toggle plates 416 move above the liquid surface 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 to the side of the drain pipe 433, and due to the action of the toggle plates 416, the liquid level of the filtered liquid can be 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 net 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, one end of the delivery pipe 429 is located above the liquid surface of the filtered liquid in the cylinder 1. When working, the mixed liquid containing sediment at the bottom of the cylinder 1 is sucked in through the one-way liquid inlet valve pipe 431 by turning on the suction pump 430, 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 net 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;

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

[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 filtering liquid. The particulate matter in the gas will contact the filtering liquid. The adhesion characteristics of the filtering liquid are used to capture plastic particles and impurities. These particles will float on the surface of the filtering 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 filtering 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 filtering liquid, the gas The body cannot fully contact with the filtering liquid, so the filtering 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 frame 43 can reciprocate along the length direction of the cylinder 1 to ensure that the gas filter 44 is always submerged in the filtering liquid. The gas filter 44 is made of washable material, which is a well-known technology and is therefore not described in detail. On the one hand, the particulate matter 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 particulate matter accumulated at the gas filter 44; on the other hand, the filtering 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-containing gas;

[0039] When the reciprocating screw rod 42 rotates, it will drive 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 filtering;

[0040] On the basis that the cleaning rod 47 rotates with the reciprocating screw rod 42, the protrusion 49 can rotate synchronously with the cleaning rod 47. When the protrusion 49 contacts the wedge block 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 block 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 block 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 out of contact with 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 water stains on the surface of the gas filter 44 after washing can be shaken off by vibration, 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 frame 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 surface 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 one side of the connecting rod 421 to be folded. When the pulley slides on the inclined surface 414, the two toggle plates 416 are folded. As the pulley moves downward, the toggle plates 416 move below the liquid surface 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 fixing 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 surface 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 state that is higher than the liquid surface of the filtered liquid and folded. At this time, the two toggle plates 416 can drive the plastic particles located on the liquid surface 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 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 net 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;

[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 tube 431, and the sucked mixed liquid is discharged from the one-way liquid outlet valve tube 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 scraper 426 with the reciprocating screw rod 42, the liquid below the one-way liquid outlet valve tube 432 can be The solid matter on the liquid filter 424 can be 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] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic powder gas purification device for plastic shell processing, comprising a cylinder (1), an air inlet pipe (2) is arranged at the bottom of the cylinder (1), an exhaust pipe (3) is arranged on one side of the top of the cylinder (1), a filtered liquid is injected into the cylinder (1), an outlet of the air inlet pipe (2) extends to the inside of the cylinder (1), and the outlet is located below the liquid level of the filtered liquid, characterized in that: A liquid discharge pipe (433) is arranged 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 arranged inside the cylinder (1); The purification component (4) is fixedly mounted on a servo motor (41) at the top of the cylinder (1); a reciprocating screw rod (42) is fixedly connected to the output end of the servo motor (41); a positioning frame (411) fixedly mounted on the inner wall of the cylinder (1) is rotatably connected to the bottom end of the reciprocating screw rod (42); a mounting frame (43) is threadedly connected to the reciprocating screw rod (42); and the mounting frame (43) is slidably mounted in the cylinder (1) in a vertical direction; and a gas filter (44) for filtering plastic powder gas is fixedly connected to the bottom of the mounting frame (43).

2. A plastic powder gas purification device for plastic shell processing according to claim 1, characterized in that: 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).

3. A plastic powder gas purification device for plastic shell processing according to claim 2, characterized in that: Wedge blocks (48) are arranged around the bottom of the gas filter (44), and a protrusion (49) adapted to the wedge blocks (48) is arranged at the end of the cleaning rod (47).

4. A plastic powder gas purification device for plastic shell processing according to claim 3, characterized in that: 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 arranged between the connecting plate (417) and the positioning frame (411).

5. A plastic powder gas purification device for plastic shell processing according to claim 4, characterized in that: A toggle plate (416) is rotatably connected to both sides of the outer wall of the sleeve rod (412), 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 arranged on both sides of the surface of the connecting plate (417), and the limiting blocks (434) are located at the inner side ends of the toggle plate (416).

6. A plastic powder gas purification device for plastic shell processing according to claim 5, characterized in that: A sliding block (420) is slidably connected to the positioning frame (411), a pulley is arranged on the top of the sliding block (420), connecting rods (421) are rotatably connected to both sides of the sliding block (420), and the other end of the connecting rod (421) is slidably mounted on the toggle plate (416) through an axle seat in a vertical direction, and a fixing plate (413) is fixedly connected to the bottom of the gas filter (44), and an inclined surface (414) and a straight surface (415) are arranged at the bottom of the fixing plate (413), and the pulley is slidably connected to the inclined surface (414) and the straight surface (415).

7. A plastic powder gas purification device for plastic shell processing according to claim 6, characterized in that: An annular frame (423) is provided at the top of the cylinder (1); a liquid filter screen (424) is provided inside the annular frame (423); a suction pump (430) is fixedly mounted 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); 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); the other end of the one-way liquid outlet valve pipe (432) is connected to the annular frame (423); a delivery pipe (429) is also connected between the annular frame (423) and the cylinder (1); one end of the delivery pipe (429) is located above the liquid level of the filtered liquid in the cylinder (1).

8. A plastic powder gas purification device for plastic shell processing according to claim 7, 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).

9. A plastic powder gas purification device for plastic shell processing according to claim 8, characterized in that: The liquid filter screen (424) is also provided with a feed opening (427), and the feed opening (427) is located as a whole on a side of the liquid filter screen (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 feed opening (427).

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