Vacuum dehumidification device suitable for PET sheet production

Abstract

The utility model discloses a vacuum dehumidification device suitable for PET sheet production, which comprises a filter tank, the upper end and the lower end of the filter tank are respectively provided with a top cover and a bottom cover, the upper end of one side of the filter tank is in butt joint with a pump set through an air outlet pipe, and the lower end of one side of the filter tank is provided with an air inlet pipe. And a filtering assembly is arranged on an annular plate fixed on the inner wall of the filtering tank. Dust is filtered through a net body between an upper circular plate and a lower circular plate during working through a filtering assembly, then the dust enters an air outlet pipe and a pump set through two ports designed in the upper circular plate, after working is finished or working is conducted for a long time, the pump set can be closed, a motor on a top cover is started to enable a driving shaft to rotate, and the driving shaft drives brush strips to rotate through a rotating head; the two brush strips can clean the surface of the net body, falling dust can fall to the bottom cover to be collected and then discharged, in this way, it is avoided that the dehumidification efficiency is reduced due to the fact that filter screen holes are blocked, meanwhile, manual cleaning is not needed within a period of time, and convenience is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum dehumidification, in particular to a vacuum dehumidification device suitable for the production of PET sheets. Background Art

[0002] PET sheet is a thermoplastic with high dimensional stability, excellent mechanical strength and good creep resistance. It is chemical resistant, has very low moisture absorption and is a good electrical insulator. PET sheet also performs well in wear-resistant applications, with a tough, hard surface that is easy to process and polish. In addition, PET sheet has the characteristics of high transparency, no water ripples, no crystallization points, no directionality, no whiteness, strong oil and chemical resistance, good toughness and rigidity, and good impact resistance. It also has a good blocking property, high transparency, high impact resistance, good cold resistance, and is not easy to be broken.

[0003] At present, in the production of PET sheets, a vacuum pump and a Roots pump are needed to extract moisture from the raw materials. At the same time, in order to prevent the pump group from being damaged by dust in the air, a filtering mechanism is also installed in the air intake pipe. For example, patent announcement No. CN219441208U discloses a vacuum dehumidification device for PET sheet production. A filter element body is provided to filter the air inside the filter tank, so that foreign particles in the air are adsorbed on the surface of the filter element body to prevent foreign particles from entering the interior of the vacuum pump and the Roots pump, causing damage to the vacuum pump and the Roots pump, thereby improving the service life of the vacuum pump and the Roots pump. An air intake pipe is provided to input the air output by the external PET extruder main machine into the interior of the filter tank, and an air outlet is provided to input the filtered air into the interior of the air supply pipe.

[0004] However, the above scheme still has room for improvement. Since the dehumidification mechanism is used almost every day during production, the filter element can easily block a lot of dust and cause the mesh to be blocked, which can easily cause the dehumidification efficiency to decrease. Some dust may even pass through the mesh due to negative pressure extrusion and cause damage to the unit. Manual cleaning requires disassembly and replacement, which is very inconvenient and inefficient. Therefore, it is necessary to design a vacuum dehumidification device with a self-cleaning filter to solve the problem.

[0005] Therefore, in view of this, the existing structure and defects are studied and improved, and a vacuum dehumidification device suitable for PET sheet production is proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a vacuum dehumidification device suitable for PET sheet production to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: it includes a filter tank, wherein a top cover and a bottom cover are respectively installed at the upper and lower ends of the filter tank, the upper end of one side of the filter tank is connected to a pump group through an air outlet pipe, and the lower end of one side of the filter tank is provided with an air inlet pipe, and a filter assembly is provided on a ring plate fixed to the inner wall of the filter tank, and the filter assembly includes an upper circular plate and a lower circular plate, the upper circular plate is placed in the ring plate and is connected to the lower circular plate with a mesh body, a drive shaft is rotatably connected between the upper and lower circular plates, the top of the drive shaft is connected to the motor shaft installed on the top cover, and the bottom of the drive shaft is connected to a rotating head, the rotating head is rotatably installed at the bottom of the lower circular plate and is connected to brush strips on both sides, and the brush strips are in contact with the outer wall of the mesh body.

[0008] Furthermore, the two brush strips are fixed on both sides of the circular sleeve, and the circular sleeve is sleeved on the outside of the rotating head and fixed with bolts.

[0009] Furthermore, the top end of the driving shaft is butted against a spline sleeve that is rotatably connected to the upper circular plate, a spline shaft is meshed inside the spline sleeve, and the spline shaft is fixedly butted against the shaft of the motor.

[0010] Furthermore, a sealing ring is bonded to the outer wall of the upper circular plate, and the sealing ring is in close contact with the inner wall of the ring plate.

[0011] Furthermore, a row of vertical rods are annularly fixed on the top of the upper circular plate, the vertical rods are inserted from the bottom rod holes of the pressure rods, and the pressure rods are fixed to the bottom of the top cover, and the pressure rods are fitted with the top surface of the upper circular plate.

[0012] Furthermore, the diameter of the upper circular plate is larger than that of the lower circular plate, and the mesh body has a funnel-shaped appearance.

[0013] Furthermore, the bottom cover is designed to be conical in appearance, and a sealing valve is installed at the outlet at the bottom of the bottom cover, and the bottom cover is threadedly sealed to the filter tank.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model uses a filtering component. When working, the dust is filtered by the mesh between the upper circular plate and the lower circular plate, and then enters the air outlet pipe and the pump group through two openings designed on the upper circular plate. When the work is finished or after working for a long time, the pump group can be turned off, and the motor on the top cover is started to rotate the drive shaft. The drive shaft drives the brush bar to rotate through the rotating head. The two brush bars can clean the surface of the mesh body, and the fallen dust will fall to the bottom cover for collection and discharge. This avoids the reduction of dehumidification efficiency due to clogging of the filter mesh holes. At the same time, no manual cleaning is required for a period of time, which is very convenient.

[0016] 2. In the utility model, the upper circular plate is larger than the lower circular plate, so the mesh body is funnel-shaped, which makes it easier for the cleaned dust to fall off, and the bottom cover is designed in a cone shape, so that the fallen dust is concentrated at the outlet, and finally the sealing valve is opened to discharge the dust for centralized treatment. Finally, the threaded installation of the bottom cover also facilitates disassembly to clean the inside. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a vacuum dehumidification device suitable for PET sheet production;

[0018] Figure 2 This is a schematic diagram of the internal structure of a vacuum dehumidification device suitable for PET sheet production;

[0019] Figure 3 This is a three-dimensional structural schematic diagram of a filter assembly of a vacuum dehumidification device suitable for PET sheet production, and the main body of the device is in an alarm state.

[0020] Figure 4 This is a schematic diagram of the internal structure of a vacuum dehumidification device filter assembly suitable for PET sheet production;

[0021] Figure 5 This is a schematic diagram of the three-dimensional structure of a ring plate of a vacuum dehumidification device suitable for PET sheet production.

[0022] In the figure: 1. filter tank; 11. top cover; 12. bottom cover; 13. outlet pipe; 14. inlet pipe; 15. ring plate; 16. motor; 17. sealing valve; 18. pressure rod; 2. pump group; 3. filter assembly; 31. upper circular plate; 32. lower circular plate; 33. mesh body; 34. drive shaft; 35. rotating head; 36. brush strip; 37. round sleeve; 39. spline shaft; 310. sealing ring; 311. vertical rod. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] Embodiment 1, as Figure 1-Figure 5As shown, it includes a filter tank 1, and the upper and lower ends of the filter tank 1 are respectively equipped with a top cover 11 and a bottom cover 12, the upper end of one side of the filter tank 1 is connected to the pump group 2 through the air outlet pipe 13, and the lower end of one side of the filter tank 1 is provided with an air inlet pipe 14. The ring plate 15 fixed to the inner wall of the filter tank 1 is provided with a filter assembly 3, and the filter assembly 3 includes an upper circular plate 31 and a lower circular plate 32. The upper circular plate 31 is placed in the ring plate 15 and is connected to the lower circular plate 32 with a mesh body 33. A driving shaft 34 is rotatably connected between the upper circular plate 31 and the lower circular plate 32. The top of the driving shaft 34 is connected to the shaft of the motor 16 installed on the top cover 11, and the bottom of the driving shaft 34 is connected to a rotating head 35. The rotating head 35 is rotatably installed at the bottom of the lower circular plate 32 and is connected with brush strips 36 on both sides. The brush strips 36 are fitted with the outer wall of the mesh body 33.

[0025] As mentioned above, through the filter component 3, the pump group 2 is started during operation, and moisture enters the interior of the filter tank 1 through the air inlet pipe 14, and filters the dust through the mesh body 33 between the upper circular plate 31 and the lower circular plate 32, and then enters the air outlet pipe 13 and the pump group 2 through the two openings designed on the upper circular plate 31. After the work is completed or after working for a long time, the pump group 2 can be turned off, and the motor 16 on the top cover 11 is started to rotate the drive shaft 34. The drive shaft 34 drives the brush bar 36 to rotate through the rotating head 35. The two brush bars 36 can clean the surface of the mesh body 33, and the fallen dust will fall to the bottom cover 12 for collection and discharge. This avoids the reduction of dehumidification efficiency due to clogging of the filter mesh holes. At the same time, no manual cleaning is required for a period of time, which is very convenient.

[0026] Two brush strips 36 are fixed on both sides of the circular sleeve 37. The circular sleeve 37 is sleeved on the outside of the rotating head 35 and fixed with bolts. The top end of the driving shaft 34 is connected to the spline sleeve 38 that is rotatably connected to the upper circular plate 31. The spline sleeve 38 is meshed with a spline shaft 39 inside, and the spline shaft 39 is fixedly connected to the shaft of the motor 16.

[0027] As mentioned above, in the disassembly and assembly design, it is convenient to disassemble and replace the brush strip 36, so as to avoid the brush strip 36 being damaged and unable to clean the outer wall of the mesh body 33 well. When the motor 16 is started, the spline shaft 39 can rotate, and through the engagement, the spline sleeve 38 and the drive shaft 34 can be driven to rotate for cleaning. In this way, the drive is very stable, and when disassembling, the top cover 11 can be directly removed and picked up to take the filter assembly 3, which is very convenient.

[0028] A circle of sealing ring 310 is bonded to the outer wall of the upper circular plate 31, and the sealing ring 310 is tightly attached to the inner wall of the ring plate 15. A row of vertical rods 311 are annularly fixed to the top of the upper circular plate 31. The vertical rods 311 are inserted from the bottom rod holes of the pressure rods 18, and the pressure rods 18 are fixed to the bottom of the top cover 11, and the pressure rods 18 are in contact with the top surface of the upper circular plate 31.

[0029] As mentioned above, in the overall installation design of the filter mechanism, the upper circular plate 31 is placed in the recess of the ring plate 15 during installation. At this time, the sealing ring 310 can increase the sealing performance. Then, after the top cover 11 is covered, the vertical rod 311 is inserted from the bottom rod hole of the pressure rod 18, and the pressure rod 18 fits the top surface of the upper circular plate 31. At the same time, a rubber pad can be added to the bottom surface of the pressure rod 18 to increase the tightness, so that the upper circular plate 31 cannot rotate and move up and down to complete the installation. This installation is very stable and avoids the use of screws to install the filter assembly 3 alone, which is convenient for subsequent disassembly and maintenance.

[0030] The diameter of the upper circular plate 31 is larger than that of the lower circular plate 32 , and the mesh body 33 is designed in a funnel shape. The bottom cover 12 is designed in a conical shape, and a sealing valve 17 is installed at the outlet at the bottom of the bottom cover 12 , and the bottom cover 12 is threadedly sealed to the filter tank 1 .

[0031] As described above, in the appearance design of the net body 33, the upper circular plate 31 is larger than the lower circular plate 32, so the net body 33 is funnel-shaped, so that the cleaned dust is easier to fall, and the bottom cover 12 is designed in a cone shape, so that the fallen dust is concentrated at the outlet, and finally the sealing valve 17 is opened to discharge the dust for centralized treatment. Finally, the threaded installation of the bottom cover 12 is also convenient for disassembly to clean the inside

[0032] Working principle: When working, start the vacuum pump and Roots pump equipment in the pump group 2, and the moisture enters the filter tank 1 through the air inlet pipe 14, and filters the dust through the mesh body 33 between the upper circular plate 31 and the lower circular plate 32, and then enters the outlet pipe 13 and the pump group 2 through the two openings designed on the upper circular plate 31 for vacuum dehumidification. When installing, put the round sleeve 37 on the outside of the rotating head 35 and fix it with bolts, then put the upper circular plate 31 in the recess of the ring plate 15, at this time, the mesh body 33 and the lower circular plate 32 pass through the ring plate 15, and then cover the top cover 11, and the vertical rod 311 is inserted from the bottom rod hole of the pressure rod 18, and the pressure rod 18 is fitted with the top surface of the upper circular plate 31 to complete the fixation, and at the same time, the flower The key shaft 39 is inserted into the spline sleeve 38 to form an engagement. When working, the pump group 2 is started, and the moisture enters the interior of the filter tank 1 through the air inlet pipe 14, and filters the dust through the mesh body 33 between the upper circular plate 31 and the lower circular plate 32, and then enters the air outlet pipe 13 and the pump group 2 through the two openings designed on the upper circular plate 31. After the work is finished or after working for a long time, the pump group 2 can be closed, and the motor 16 on the top cover 11 is started to rotate the drive shaft 34. The drive shaft 34 drives the brush strip 36 to rotate through the rotating head 35. The two brush strips 36 can clean the surface of the mesh body 33, and the fallen dust will fall to the bottom cover 12 for collection. Finally, the sealing valve 17 is opened to discharge the dust for centralized treatment.

[0033] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A vacuum dehumidification device suitable for PET sheet production, comprising a filter tank (1), characterized in that: The filter tank (1) is provided with a top cover (11) and a bottom cover (12) at the upper and lower ends respectively; the upper end of one side of the filter tank (1) is connected to a pump unit (2) via an air outlet pipe (13); the lower end of one side of the filter tank (1) is provided with an air inlet pipe (14); and a filter assembly (3) is provided on a ring plate (15) fixed to the inner wall of the filter tank (1); The filter assembly (3) comprises an upper circular plate (31) and a lower circular plate (32); the upper circular plate (31) is placed in the ring plate (15) and is connected to the lower circular plate (32) with a mesh body (33); a drive shaft (34) is rotatably connected between the upper circular plate (31) and the lower circular plate (32); the top of the drive shaft (34) is butted against the shaft of a motor (16) mounted on the top cover (11); and the bottom of the drive shaft (34) is butted against a rotating head (35); the rotating head (35) is rotatably mounted on both sides of the bottom of the lower circular plate (32) and is connected to brush strips (36); the brush strips (36) are in contact with the outer wall of the mesh body (33).

2. A vacuum dehumidification device suitable for PET sheet production according to claim 1, characterized in that: The two brush strips (36) are fixed on both sides of a circular sleeve (37), and the circular sleeve (37) is sleeved on the outside of the rotating head (35) and fixed with bolts.

3. A vacuum dehumidification device suitable for PET sheet production according to claim 1, characterized in that: The top end of the driving shaft (34) is butted against a spline sleeve (38) rotatably connected to the upper circular plate (31), a spline shaft (39) is meshed inside the spline sleeve (38), and the spline shaft (39) is fixedly butted against the shaft of the motor (16).

4. A vacuum dehumidification device suitable for PET sheet production according to claim 1, characterized in that: A sealing ring (310) is bonded to the outer wall of the upper circular plate (31), and the sealing ring (310) is in close contact with the inner wall of the ring plate (15).

5. A vacuum dehumidification device suitable for PET sheet production according to claim 1, characterized in that: A row of vertical rods (311) is fixed in a ring shape on the top of the upper circular plate (31). The vertical rods (311) are inserted from the bottom rod holes of the pressure rods (18). The pressure rods (18) are fixed to the bottom of the top cover (11). The pressure rods (18) are in contact with the top surface of the upper circular plate (31).

6. A vacuum dehumidification device suitable for PET sheet production according to claim 5, characterized in that: The diameter of the upper circular plate (31) is larger than that of the lower circular plate (32), and the mesh body (33) has a funnel-shaped appearance.

7. A vacuum dehumidification device suitable for PET sheet production according to claim 1, characterized in that: The bottom cover (12) has a conical appearance, and a sealing valve (17) is installed at the outlet at the bottom of the bottom cover (12), and the bottom cover (12) is threadedly sealed to the filter tank (1).

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