A continuous screen changer for plastic granulation production

Abstract

The present invention relates to a continuous wire screen changer for plastic granulation production, which belongs to the technical field of plastic production equipment. It includes an outer shell, a screen changing device is provided on the inner side of the outer shell, the screen changing device includes two filter screen plates, a lifting device is provided above the two filter screen plates, a material passing shell is provided on the outer side of the filter screen plates, a through hole is provided on the material passing shell, a heating pipe is provided inside the material passing shell, and a feeding device is provided on both sides of the screen changing device. The feeding device includes a circular connecting piece, the circular connecting piece is connected to the material passing shell by screws, square tubes are provided on the sides of the two adjacent circular connecting pieces, a circular tube is provided on the square tube, an inlet is provided on one side of the feeding device, and a discharge port is provided on the other side of the feeding device, the discharge port includes a discharge box, a transfer pipe is provided on the inner side of the discharge box, a short-range hydraulic telescopic rod is provided at one end of the transfer pipe, and an auxiliary discharge port is provided on the side of the discharge port. The present invention as a whole has the advantages that the screen changer does not need to be shut down and restarted during screen changing, and is not prone to wire breakage and other problems after screen changing.

Description

Technical Field

[0001] The invention relates to a continuous wire screen changer for plastic granulation production, belonging to the technical field of plastic production equipment. Background Art

[0002] The screen changer is an important component used to filter impurities in the raw materials during the production process of the granulator. It can screen out and intercept larger impurities in the raw materials through a small-aperture filter, and the raw materials with impurities removed can continue to the next processing. The raw materials that have been treated with impurities removal can reduce the occurrence of defective products and improve product quality. It can also screen out more smaller impurities in the raw materials by replacing the screen and selecting other mesh sizes.

[0003] At present, when replacing the screen or adding a secondary screen, the common screen changer needs to stop the machine and suspend work before cleaning it before replacing the screen. Not only is the replacement speed slow and troublesome to operate, but it also reduces production efficiency. In addition, during the screen changing process, the common screen changer causes air to enter the machine due to the filter leaving the screen changer. After the raw materials are mixed with air, they are prone to breakage and waste during extrusion, which increases production costs. After the machine is turned off and restarted, it takes a long time to preheat the machine before it can enter a normal working state. The preheating process not only consumes a lot of energy, but also takes a long time of production time, which is not conducive to industrial production. However, if the preheating step is omitted, the granulator will easily produce products of extremely poor quality when it is produced without preheating, which is difficult to use and sell normally, wasting resources and increasing production costs.

[0004] Patent document CN104015270B discloses a non-breaking wire die head device. In this solution, two slurry supply channels are set inside the device, and the two supply channels work together. When a problem occurs in one of the supply channels, the other supply channel is used to supply material, which can ensure that the slurry is always supplied in sufficient quantity and avoid the plastic wire breakage caused by material shortage. However, in this solution, one side of the output channel is blocked by a diverter plate. The strong pressure inside the device makes it difficult to completely close the diverter plate. After the diverter plate is pushed open by the raw material, air is easily introduced, resulting in broken wires. Summary of the Invention

[0005] In view of the defects in the above-mentioned prior art, the present invention provides a non-stop screen changer for plastic granulation production, which solves the problems of the screen changer needing to be shut down and restarted during the screen changing process and the easy occurrence of wire breakage after the screen changing.

[0006] The object of the present invention is achieved through the following technical scheme, a continuous wire screen changer for plastic granulation production: it includes a shell, the inner side of the shell is provided with a screen changing device, the screen changing device includes two filter plates, and the two filter plates are both provided with a lifting device, the outer side of the filter plate is provided with a material passing shell, the material passing shell is provided with a through hole, and the material passing shell is provided with a heating pipe. Both sides of the screen changing device are provided with a feeding device, and the feeding device includes a circular connecting piece, the circular connecting piece is connected to the material passing shell by screws, and two adjacent circular connecting pieces are provided with square tubes on the sides, the square tube is provided with a circular tube, and the circular tube is fixedly connected to the square tube, one side of the feeding device is provided with a feeding port, and the other side of the feeding device is provided with a discharging port, and the discharging port includes a discharging box, the inner side of the discharging box is provided with a transfer pipe, one end of the transfer pipe is provided with a short-range hydraulic telescopic rod, and the side of the discharging port is provided with an auxiliary discharging port, and the auxiliary discharging port is connected to the shell by screws.

[0007] Furthermore, the lifting device includes a support plate, a support column is provided under the support plate, the support column is connected to the feed shell by welding, the support plate is connected to the support column by screws, a hydraulic telescopic rod is provided on the support plate, the hydraulic telescopic rod is connected to the support plate by screws, the hydraulic telescopic rod is connected to the filter plate by a snap connection, so that the hydraulic telescopic rod can lift and lower the filter plate, and the support plate provides height support for the hydraulic telescopic rod.

[0008] Furthermore, the square tube includes a first square tube, a second square tube is provided on the side of the first square tube, a partition is provided between the first square tube and the second square tube, and a round tube is provided on both the first square tube and the second square tube, so that the partition divides the square tube into two parts, and the two round tubes are respectively connected to the two material transfer shells through the first square tube and the second square tube.

[0009] Furthermore, a first discharge hole is provided on the discharge box, a connecting circular plate is provided on the outside of the first discharge hole, a sealing cover is provided on one side of the discharge box, and a sealing ring is provided on the other side of the discharge box. The sealing cover and the sealing ring are connected to the discharge box by screws, and the connecting circular plate is used to connect the discharge box with other production equipment.

[0010] Furthermore, the transfer tube includes a main transfer tube, a first outflow hole is provided on one side of the main transfer tube, the first outflow hole is the same size as the first discharge hole, the other side of the main transfer tube is connected to the first square tube through a circular tube, and an auxiliary transfer tube is provided at one end of the main transfer tube to facilitate the connection of the main transfer tube to the first square tube and to send the slurry transported by the first square tube out of the first outflow hole.

[0011] Furthermore, the auxiliary transfer tube is connected to the main transfer tube by a snap buckle, a second outflow hole is provided at the bottom of the auxiliary transfer tube, and the side surface of the auxiliary transfer tube is connected to the second square tube by a round tube, so as to facilitate the connection between the auxiliary transfer tube and the second square tube and send the slurry transported by the second square tube out from the second outflow hole.

[0012] Furthermore, the auxiliary discharge port includes a mounting seat, a discharge box is provided on the mounting seat, a fixing plate is provided on the side of the discharge box, a second discharge hole is penetrated through the fixing plate, and the mounting seat and the fixing plate are connected by screws to facilitate fixing the auxiliary discharge port to the outer shell.

[0013] Furthermore, the discharge box is connected to the second outflow hole through a pipe, so as to facilitate the transportation of the slurry discharged from the second outflow hole into the discharge box.

[0014] Furthermore, a mounting plate is provided on the side of the short-range hydraulic telescopic rod, the mounting plate is connected to the shell by welding, and the mounting plate is connected to the short-range hydraulic telescopic rod by screws, so as to facilitate fixing the short-range hydraulic telescopic rod to the shell.

[0015] In summary, the present invention has the following advantages compared with the prior art:

[0016] 1. In the present invention, an auxiliary discharge port is added to the side of the screen changing box. When the filter screen is replaced, the position of the transfer pipe and the auxiliary transfer pipe is changed to allow the slurry to enter the auxiliary discharge port from the auxiliary transfer pipe and be output to other equipment. This can prevent air from mixing into the slurry during the screen changing process, resulting in broken wires and other waste, thereby reducing production costs.

[0017] 2. The device of the present invention is provided with dual channels. When changing the screen, one of the channels is blocked and the other channel is enabled, so that the screen can be changed without stopping the machine, avoiding the need for restarting the machine for preheating, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a partial structural diagram of the screen changing device of the present invention;

[0020] Figure 3 It is a schematic diagram of the partial structure of the feeding device of the present invention;

[0021] Figure 4 This is an exploded schematic diagram of the discharge port and auxiliary discharge port structure of the present invention;

[0022] Figure 5 This is a perspective diagram of the transfer tube structure of the present invention;

[0023] Figure 6It is a right side structural schematic diagram of the present invention.

[0024] In the figure: 1-housing, 2-screen changing device, 3-feeding device, 4-feeding port, 5-feeding port, 6-auxiliary feeding port;

[0025] 21- filter plate, 22- lifting device, 23- material shell, 31- circular connector, 32- square tube, 33- round tube, 51- discharge box, 52- adapter tube, 53- short-range hydraulic telescopic rod, 54- mounting plate, 61- mounting seat, 62- discharge box, 63- fixing plate, 64- second discharge hole;

[0026] 221-support plate, 222-support column, 223-hydraulic telescopic rod, 231-through hole, 232-heating tube, 321-first square tube, 322-second square tube, 323-partition, 511-first discharge hole, 512-connecting circular plate, 513-sealing cover, 514-sealing ring, 521-main transfer tube, 522-first outflow hole, 523-auxiliary transfer tube, 524-second outflow hole. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further specifically described below through specific embodiments, but the present invention is not limited to these embodiments.

[0028] Example 1

[0029] Combine Figure 1 and Figure 2 and Figure 6 As shown, a continuous wire screen changer for plastic granulation production includes a shell 1, a screen changing device 2 is provided inside the shell 1, the screen changing device 2 includes two filter plates 21, and a lifting device 22 is provided above the two filter plates 21. A material passing shell 23 is provided on the outside of the filter plates 21, and a through hole 231 is provided on the material passing shell 23. A heating pipe 232 is provided inside the material passing shell 23. A feeding device 3 is provided on both sides of the screen changing device 2, and the feeding device 3 includes a circular connecting piece 31. The circular connecting piece 31 is connected to the material passing shell 23. The two adjacent circular connectors 31 are connected by screws. Square tubes 32 are provided on the sides of the square tubes 32. A circular tube 33 is provided on the square tubes 32. The circular tubes 33 are fixedly connected to the square tubes 32. An inlet 4 is provided on one side of the feeding device 3, and a discharge port 5 is provided on the other side of the feeding device 3. The discharge port 5 includes a discharge box 51. A transfer tube 52 is provided on the inner side of the discharge box 51. A short-range hydraulic telescopic rod 53 is provided at one end of the transfer tube 52. An auxiliary discharge port 6 is provided on the side of the discharge port 5, and the auxiliary discharge port 6 is connected to the outer shell 1 by screws.

[0030] Combine Figure 1 and Figure 2As shown, the lifting device 22 includes a support plate 221, a support column 222 is provided below the support plate 221, the support column 222 is connected to the material transfer shell 23 by welding, the support plate 221 and the support column 222 are connected by screws, a hydraulic telescopic rod 223 is provided on the support plate 221, the hydraulic telescopic rod 223 is connected to the support plate 221 by screws, and the hydraulic telescopic rod 223 is connected to the filter plate 21 by a buckle, so that the hydraulic telescopic rod 223 can lift and lower the filter plate 21, and the support plate 222 provides height support for the hydraulic telescopic rod 223;

[0031] Combine Figure 3 As shown, the square tube 32 includes a first square tube 321, a second square tube 322 is provided on the side of the first square tube 321, a partition 323 is provided between the first square tube 321 and the second square tube 322, and a circular tube 33 is provided on both the first square tube 321 and the second square tube 322. The partition 323 divides the square tube 32 into two parts, and the two circular tubes 33 are respectively connected to the two feed shells 23 through the first square tube 321 and the second square tube 322;

[0032] Combine Figure 1 and Figure 4 As shown, the discharge box 51 is provided with a first discharge hole 511, and a connecting circular plate 512 is provided on the outer side of the first discharge hole 511. A sealing cover 513 is provided on one side of the discharge box 51, and a sealing ring 514 is provided on the other side of the discharge box 51. The sealing cover 513 and the sealing ring 514 are connected to the discharge box 51 by screws. The connecting circular plate 512 is used to connect the discharge box 51 with other production equipment, the sealing cover 513 is used to seal the transfer tube 52 and the discharge box 51, and the sealing ring 514 is used to seal the short-range hydraulic telescopic rod 53 and the discharge box 51.

[0033] Combine Figure 3 and Figure 5 As shown, the transfer pipe 52 includes a main transfer pipe 521, a first outflow hole 522 is provided on one side of the main transfer pipe 521, and the first outflow hole 522 is the same size as the first discharge hole 511. The other side of the main transfer pipe 521 is connected to the first square pipe 321 through the circular pipe 33. An auxiliary transfer pipe 523 is provided at one end of the main transfer pipe 521. The main transfer pipe 521 is connected to the first square pipe 321, and the slurry conveyed by the first square pipe 321 is discharged from the first outflow hole 522, and the slurry is sent to the outside of the discharge box 51 through the first discharge hole 511.

[0034] Combine Figure 3 and Figure 5As shown, the auxiliary transfer tube 523 is connected to the main transfer tube 521 by a snap fastener, a second outflow hole 524 is provided at the bottom of the auxiliary transfer tube 523, and the side of the auxiliary transfer tube 523 is connected to the second square tube 322 through the circular tube 33, so as to facilitate fixing the auxiliary discharge port 523 to the housing 1. When the main transfer tube 521 moves outward, the auxiliary transfer tube 523 moves outward accordingly and is connected to the second square tube 533 through the circular tube 33, thereby delivering the slurry to the auxiliary discharge port 6;

[0035] Combine Figure 1 and Figure 5 As shown, the auxiliary discharge port 6 includes a mounting base 61, a discharge box 62 is provided on the mounting base 61, a fixing plate 63 is provided on the side of the discharge box 62, and a second discharge hole 64 is penetrated through the fixing plate 63. The mounting base 61 and the fixing plate 63 are connected by screws. The auxiliary transfer tube 523 delivers the slurry into the discharge box 62, and then delivers it from the discharge box 62 to other equipment through the second discharge hole 64.

[0036] Combine Figure 5 As shown, the discharge box 62 is connected to the second outflow hole 524 through a pipe, so that the slurry in the auxiliary transfer tube 523 can be transported to the discharge box 62;

[0037] Combine Figure 1 and Figure 5 As shown, a mounting plate 54 is provided on the side of the short-range hydraulic telescopic rod 53, the mounting plate 54 is connected to the housing 1 by welding, the mounting plate 54 is connected to the short-range hydraulic telescopic rod 53 by screws, and the short-range hydraulic telescopic rod 53 is connected to the housing 1 through the mounting plate 54, which is convenient for firm fixation.

[0038] Working principle: When the present invention is in use, the raw material enters the housing 1 from the feed port 4, passes through the circular tube 33 and then enters the first square tube 321, passes through the circular connector 31 and enters the screen changing device 2, and after the impurities are sieved out by the filter plate 21, passes through the circular connector 31 at the output end of the screen changing device 2 and the first square tube 321 and enters the main transfer pipe 521, flows out from the first outflow hole 522 and is transferred to other equipment through the first discharge hole 511. When it is necessary to replace the filter screen of one of the filter plates 21, the lifting device 22 lifts the filter plate 21 through the hydraulic telescopic rod 223, closes a circular tube 33 at the feed port 4, and the slurry passes through the other circular tube 33 and the filter plate 21, and then is sent to the circular connector 31 and the filter plate 21 connected thereto. In the second square tube 322, the short-range hydraulic telescopic rod 53 is started, dragging the transfer tube 52 outward, the circular tube 33 connected to the first square tube 321 is separated from the main transfer tube 521 and is blocked by the outer wall of the transfer tube 52, the auxiliary transfer tube 523 is connected to the circular tube 33 connected to the second square tube 322, and the second outflow hole 524 is connected to the pipe below. The slurry enters the auxiliary transfer tube 523 through the second square tube 322 and the circular tube 33, and then enters the discharge box 62, and is finally transported to other equipment through the second discharge hole 64. After the filter is replaced, the lifting device 22 lowers the filter plate 21 back to its original position, and the short-range hydraulic telescopic rod 53 pushes the transfer tube 52 back. The slurry resumes its original route and is discharged from the first discharge hole 511.

[0039] The embodiments of the present invention are not limited to the above embodiments. Without departing from the spirit and scope of the present invention, ordinary technicians in this field can make various changes and improvements to the present invention in form and details, and these are all considered to fall within the scope of protection of the present invention.

Claims

1. A continuous screen changer for plastic granulation production, comprising a housing (1), characterized in that: A screen changing device (2) is provided on the inner side of the housing (1), and the screen changing device (2) includes two filter screen plates (21). A lifting device (22) is provided above the two filter screen plates (21). A material passing shell (23) is provided on the outer side of the filter screen plates (21). A through hole (231) is provided on the material passing shell (23). A heating pipe (232) is provided inside the material passing shell (23). A material feeding device (3) is provided on both sides of the screen changing device (2). The material feeding device (3) includes a circular connecting piece (31). The circular connecting piece (31) is connected to the material passing shell (23) by screws. Two adjacent circular connecting pieces are connected. A square tube (32) is provided on the side of the component (31), a round tube (33) is provided on the square tube (32), and the round tube (33) is fixedly connected to the square tube (32). A feed port (4) is provided on one side of the feeding device (3), and a discharge port (5) is provided on the other side of the feeding device (3). The discharge port (5) includes a discharge box (51), a transfer tube (52) is provided on the inner side of the discharge box (51), and a short-range hydraulic telescopic rod (53) is provided at one end of the transfer tube (52). An auxiliary discharge port (6) is provided on the side of the discharge port (5), and the auxiliary discharge port (6) is connected to the housing (1) by screws. The square tube (32) comprises a first square tube (321), a second square tube (322) is provided on the side of the first square tube (321), a partition (323) is provided between the first square tube (321) and the second square tube (322), and a circular tube (33) is provided on both the first square tube (321) and the second square tube (322); The discharge box (51) is provided with a first discharge hole (511), a connecting circular plate (512) is provided on the outside of the first discharge hole (511), a sealing cover (513) is provided on one side of the discharge box (51), and a sealing ring (514) is provided on the other side of the discharge box (51), and the sealing cover (513) and the sealing ring (514) are connected to the discharge box (51) by screws; The transfer tube (52) comprises a main transfer tube (521), one side of the main transfer tube (521) is provided with a first outflow hole (522), the first outflow hole (522) is the same size as the first discharge hole (511), the other side of the main transfer tube (521) is connected to the first square tube (321) via a circular tube (33), and one end of the main transfer tube (521) is provided with an auxiliary transfer tube (523); The auxiliary transfer tube (523) is connected to the main transfer tube (521) via a buckle; a second outflow hole (524) is provided at the bottom of the auxiliary transfer tube (523); and a side surface of the auxiliary transfer tube (523) is connected to the second square tube (322) via a circular tube (33).

2. The non-stop screen changer for plastic granulation production according to claim 1, characterized in that: The lifting device (22) comprises a support plate (221), a support column (222) is provided below the support plate (221), the support column (222) is connected to the material transfer shell (23) by welding, the support plate (221) and the support column (222) are connected by screws, a hydraulic telescopic rod (223) is provided on the support plate (221), the hydraulic telescopic rod (223) is connected to the support plate (221) by screws, and the hydraulic telescopic rod (223) is connected to the filter plate (21) by a snap fastener.

3. The non-stop screen changer for plastic granulation production according to claim 2, characterized in that: The auxiliary discharge port (6) comprises a mounting seat (61), a discharge box (62) is provided on the mounting seat (61), a fixing plate (63) is provided on the side of the discharge box (62), a second discharge hole (64) is penetrated through the fixing plate (63), and the mounting seat (61) and the fixing plate (63) are connected by screws.

4. The non-stop screen changer for plastic granulation production according to claim 3, characterized in that: The discharge box (62) is connected to the second outflow hole (524) via a pipeline.

5. The non-stop screen changer for plastic granulation production according to claim 4, characterized in that: A mounting plate (54) is provided on the side of the short-range hydraulic telescopic rod (53); the mounting plate (54) is connected to the housing (1) by welding; and the mounting plate (54) is connected to the short-range hydraulic telescopic rod (53) by screws.

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