Vacuum drying device for polyethylene sheath material production

Abstract

The utility model relates to the technical field of drying, in particular to a vacuum drying device for polyethylene sheath material production, which comprises a shell, a stirrer, a vacuumizing device, a discharging device and a water steam pumping device, one end of the stirrer extends into the shell; the vacuumizing device is connected with the shell; the discharging device is arranged on the side, close to the ground, of the shell. The steam pumping device is arranged on the side, away from the ground, of the shell. The shell comprises a discharge port; and the discharge port corresponds to the discharge device. A traditional vacuum drying device is not provided with a moisture discharge system during drying, so that water vapor is adhered to the inner wall to form water drops, materials are easily adhered to moisture on the inner wall repeatedly, and the drying effect is poor. And when a large number of particles such as polyethylene sheath materials are dried, the particles are mixed with one another, moisture at the bottom is difficult to evaporate out, and the drying time is long. Compared with the prior art, the drying device is provided with the drainage structure, so that water can be drained from the interior of the drying device during drying, and the drying process is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to a vacuum drying device for producing polyethylene sheathing materials. Background Art

[0002] Vacuum drying is a drying method that places the material under negative pressure conditions and appropriately heats it to reach the boiling point under negative pressure or cools it down to make the material solidify and then dry it through the melting point. After the polyethylene sheath material has gone through processes such as pelletizing, it is usually necessary to remove the moisture in it to avoid excessive water content that makes the material too heavy and inconvenient to transport or water corroding the material, affecting transportation and storage. Polyethylene sheath materials will deform under high temperature conditions around 100°C. It takes 100°C for water to evaporate at room temperature. Vacuum drying can evacuate the inside of the device through a vacuum pump to place the polyethylene sheath material under negative pressure conditions, greatly reducing the boiling point of water, thereby reducing the temperature required for heating and drying, so that the properties of the material itself do not change during the water evaporation process.

[0003] Traditional vacuum drying devices do not have a water discharge system during the drying process, so water vapor adheres to the inner wall to form water droplets. When drying a large amount of material, it is easy to repeatedly get water on the inner wall, resulting in poor drying effect. In addition, the interior of the vacuum drying device is generally a cavity. When drying a large amount of granular materials such as polyethylene sheath materials, the particles are mixed together, and the water at the bottom is difficult to evaporate, so the drying time is long. Utility Model Content

[0004] In view of the technical problems of the prior art, the utility model provides a vacuum drying device for producing polyethylene sheathing materials.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A vacuum drying device for producing polyethylene sheathing materials comprises: a shell, a stirrer, a vacuum pumping device, a discharge device, and a water vapor extraction device; one end of the stirrer extends into the shell; the vacuum pumping device is connected to the shell; the discharge device is arranged on the side of the shell close to the ground; the water vapor extraction device is arranged on the side of the shell away from the ground; the shell comprises a discharge port; the discharge port corresponds to the discharge device.

[0007] Furthermore, the steam extraction device includes: a steam extraction pipe, a steam extraction pump, and a steam outlet pipe; the steam extraction pipe is connected to the side of the shell away from the ground; one end of the steam extraction pump is connected to the steam extraction pipe, and the other end is connected to the steam outlet pipe; a steam extraction valve is provided on the steam extraction pipe; the steam extraction valve is connected to the shell outside the shell; a screen net is provided inside the steam extraction pipe near one end of the shell.

[0008] Furthermore, the agitator includes: a stirring motor, a stirring rod, and a stirring blade; one end of the stirring rod is connected to the stirring motor, and the other end is arranged inside the shell; the stirring blade is arranged inside the shell; the stirring blade is arranged from one end of the stirring rod to the other end; the stirring blade is arranged along the circumference of the stirring rod.

[0009] Furthermore, the shell includes: an inlet plate, a temperature control plate, and an outlet; the inlet plate is arranged on the side of the shell away from the ground; the temperature control plate is arranged on both sides of the shell; the outlet is arranged on the side of the shell close to the ground; the outlet corresponds to the discharge device.

[0010] Furthermore, the discharge device includes: a sieve plate, a partition plate, a water absorption plate, and a discharge plate; the sieve plate is arranged on the side of the discharge port away from the ground; one end of the partition plate is connected to the sieve plate, and the other end is connected to the water absorption plate; the discharge plate is connected to the water absorption plate.

[0011] Furthermore, a steering shaft is provided at one end of the discharge plate, and a limiting plate is provided at the other end; the steering shaft is rotatably connected to the shell; a rotating opening is provided on the side of the shell close to the ground; the rotating opening corresponds to the limiting plate, so that the limiting plate does not conflict with the shell when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : A schematic diagram of the structure of the utility model;

[0013] Figure 2 : Sectional view of the structural part of the shell;

[0014] Figure 3 : Schematic diagram of the structure of the agitator;

[0015] Figure 4 : Schematic diagram of the explosion of the steam extraction pipe;

[0016] Figure 5 : Schematic diagram of the explosion of the discharge device.

[0017] In the figure: 1. Shell; 11. Feed plate; 12. Temperature control plate; 13. Discharge port; 14. Rotation port; 2. Agitator; 21. Stirring motor; 22. Stirring rod; 23. Stirring blade; 3. Vacuum extraction device; 31. Exhaust pipe; 311. Vacuum valve; 32. Vacuum pump; 33. Exhaust pipe; 4. Exhaust device; 41. Sieve plate; 411. Sieve plate handle; 42. Partition plate; 421. Partition plate handle; 43. Water absorption plate; 44. Discharge plate; 441. Steering shaft; 442. Limiting plate; 443. Discharge plate handle; 5. Water vapor extraction device; 51. Steam extraction pipe; 511. Steam extraction valve; 512. Sieve net; 52. Steam extraction pump; 53. Steam outlet pipe. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] according to Figure 1-5 The utility model provides a vacuum drying device for producing polyethylene sheathing materials, comprising: a shell 1, a stirrer 2, a vacuum pumping device 3, a discharge device 4, and a water vapor pumping device 5.

[0020] The vacuum device 3 includes: an air extraction pipe 31, a vacuum pump 32, and an air outlet pipe 33. The air extraction pipe 31 is connected to the housing 1. One end of the vacuum pump 32 is connected to the air extraction pipe 31, and the other end is connected to the air outlet pipe 33. A vacuum valve 311 is sleeved on the air extraction pipe 31. The vacuum valve 311 is connected to the housing 1 outside the housing 1. When the vacuum valve 311 is closed, moisture can be prevented from entering the vacuum pump 32 from the air extraction pipe 31 during the drying process, thereby avoiding problems such as damage to the vacuum pump 32 and low air extraction efficiency.

[0021] The steam extraction device 5 includes: a steam extraction pipe 51, a steam extraction pump 52, and a steam outlet pipe 53. The steam extraction pipe 51 is connected to the side of the shell 1 away from the ground. One end of the steam extraction pump is connected to the steam extraction pipe 51, and the other end is connected to the steam outlet pipe 53. A steam extraction valve 511 is sleeved on the steam extraction pipe 51. The steam extraction valve 511 is connected to the shell 1 outside the shell 1. A sieve net 512 is provided inside the steam extraction pipe 51 near one end of the shell 1. When extracting water vapor, the steam extraction valve 511 is opened, and the steam extraction pump 52 extracts steam, and water vapor is extracted from the steam extraction pipe 51. The material cannot enter the steam extraction pipe 51 due to the sieve net 512. After the steam extraction is completed, the steam extraction valve 511 is closed, and then the steam extraction pump 52 is closed to prevent air from entering the shell 1.

[0022] The agitator 2 includes: a stirring motor 21, a stirring rod 22, and a stirring blade 23. One end of the stirring rod 22 is connected to the stirring motor 21, and the other end is arranged inside the shell 1. The stirring blade 23 is arranged inside the shell 1. The stirring blade 23 is arranged from one end of the stirring rod 22 to the other end. The stirring blade 23 is arranged circumferentially along the stirring rod 22. By arranging the stirring blade 23 in this way, the material can be distributed at various positions inside the shell 1 when feeding. At the same time, the stirring range is large, and the material can be brought to any position of the internal cavity of the shell 1, and the stirring effect is good and uniform.

[0023] The housing 1 includes: an inlet plate 11, a temperature control plate 12, an outlet 13, and a rotating port 14. The outlet 13. The inlet plate 11 is arranged on the side of the housing 1 away from the ground. The temperature control plate 12 is arranged on both sides of the housing 1. The outlet 13 is arranged on the side of the housing 1 close to the ground. The outlet 13 corresponds to the discharge device 4.

[0024] The discharge device 4 includes: a sieve plate 41, a partition plate 42, a water absorption plate 43, and a discharge plate 44. The sieve plate 41 allows water to pass through but does not allow material to pass through. The sieve plate 41 is arranged on the side of the discharge port 13 away from the ground. One end of the partition plate 42 is connected to the sieve plate 41, and the other end is connected to the water absorption plate 43. The discharge plate 44 is connected to the water absorption plate 43. Before the equipment is started, the sieve plate handle 411 is pushed to make it contact with the shell 1, the partition plate handle 421 is pulled to make it away from the sieve plate 41, and the discharge plate 44 is pushed to be embedded in the shell 1 to close the inside of the shell 1. When the equipment is started, the material is squeezed and stirred, so that part of the water is left at the bottom. It is difficult for this water to be heated to a certain temperature, and the evaporated water vapor will be blocked by the material and is difficult to rise and re-condense into water droplets. This deposited water is difficult to be discharged through the water vapor extraction device 5, but can enter the water absorption plate 43 through the sieve plate 41 and then be discharged to the outside of the shell 1.

[0025] A steering shaft 441 is provided at one end of the discharge plate 44, and a limiting plate 442 is provided at the other end. The steering shaft 441 is rotatably connected to the shell 1. The rotating port 14 corresponds to the limiting plate 442, so that the limiting plate 442 does not conflict with the shell 1 when rotating. After the absorption of water is completed, the partition plate handle 421 is pushed to form a closed structure between the partition plate 42 and the shell 1, and the discharge plate handle 443 is pulled to be relatively away from the shell 1 around the steering shaft 441. Due to the existence of the rotating port 14, when the discharge plate 44 rotates, the end does not collide with the shell 1. During the rotation process, the bottom of the water absorption plate 43 rests on the limiting plate 442 to prevent it from falling off.

[0026] The working principle and use process of this utility model:

[0027] Before using the utility model, open the feed plate 11, add the material into the shell 1, close the feed plate 11, close the steam extraction valve 511 and the vacuum valve 311, push the sieve plate handle 411 and the discharge plate handle 443 to seal the shell 1. Open the vacuum valve 311, start the vacuum pump 32, and the air enters the exhaust pipe 31 and is discharged from the exhaust pipe 33. After a certain period of time, close the vacuum valve 311 to make the shell 1 under a certain pressure. Start the temperature control plate 12 to heat the inside of the shell 1 to a certain temperature, and start the stirring motor 21 at the same time to drive the stirring rod 22 to rotate, so that the stirring blade 23 is continuously stirred. After a certain period of time, open the steam extraction valve 511, start the steam extraction pump 52, and water vapor enters the steam extraction pipe 51 and is discharged from the steam outlet pipe 53. Then close the steam extraction valve 511 and the steam extraction pump 52 in turn, and repeat the cycle to extract water vapor. The moisture deposited at the bottom enters the water absorption plate 43 through the sieve plate 41. After the moisture is absorbed, push the partition plate handle 421 to seal the partition plate 42 and the shell 1. Pull the discharge plate handle 443 to take out the water absorption plate 43. When the drying is completed, the temperature inside the shell 1 is lowered to room temperature through the temperature control plate 12, and the vacuum valve 311 and the vacuum pump 32 are opened at the same time to allow air to slowly enter the shell 1 so that the atmospheric pressure inside the shell 1 returns to normal after a period of time. Finally, pull the sieve plate handle 411 and the partition plate handle 421 to discharge the material from the discharge device 4. During this process, the stirring rod 22 can be slightly rotated so that the stirring blade 23 drives the material to promote the discharge of the material.

[0028] In summary, the utility model provides a water vapor extraction device and a discharge device, so that the moisture in the drying process can be discharged from the inside of the equipment, which accelerates the drying process and prevents corrosion caused by moisture remaining on the inner wall for a long time.

[0029] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A vacuum drying device for the production of polyethylene sheathing materials, characterized in that: include: A housing (1), a stirrer (2), a vacuum device (3), a discharge device (4), and a water vapor extraction device (5); One end of the agitator (2) extends into the interior of the housing (1); The vacuum extraction device (3) is connected to the housing (1); The discharge device (4) is arranged on a side of the housing (1) close to the ground; The water vapor extraction device (5) is arranged on a side of the housing (1) away from the ground; The housing (1) comprises a discharge port (13); The discharge port (13) corresponds to the discharge device (4).

2. A vacuum drying device for producing polyethylene sheathing material as claimed in claim 1, characterized in that: The steam extraction device (5) comprises: a steam extraction pipe (51), a steam extraction pump (52), and a steam outlet pipe (53); The steam extraction pipe (51) is connected to a side of the shell (1) away from the ground; One end of the steam extraction pump is connected to the steam extraction pipe (51), and the other end is connected to the steam outlet pipe (53); The steam extraction pipe (51) is sleeved with a steam extraction valve (511); The steam extraction valve (511) is connected to the shell (1) outside the shell (1); A screening net (512) is provided inside the steam extraction pipe (51) at one end close to the shell (1).

3. A vacuum drying device for producing polyethylene sheathing material as claimed in claim 1, characterized in that: The stirrer (2) comprises: a stirring motor (21), a stirring rod (22), and a stirring blade (23); one end of the stirring rod (22) is connected to the stirring motor (21), and the other end is arranged inside the housing (1); The stirring blade (23) is arranged inside the housing (1); The stirring blade (23) is arranged from one end of the stirring rod (22) to the other end; The stirring blade (23) is arranged along the circumference of the stirring rod (22).

4. A vacuum drying device for producing polyethylene sheathing material as claimed in claim 1, characterized in that: The housing (1) comprises: an inlet plate (11), a temperature control plate (12), and an outlet (13); The feed plate (11) is arranged on a side of the housing (1) away from the ground; The temperature control plates (12) are arranged on both sides of the shell (1); The discharge port (13) is arranged on a side of the housing (1) close to the ground; The discharge port (13) corresponds to the discharge device (4).

5. A vacuum drying device for producing polyethylene sheathing material as claimed in claim 1, characterized in that: The discharge device (4) comprises: a sieve plate (41), a partition plate (42), a water absorption plate (43), and a discharge plate (44); The sieve plate (41) is arranged on a side of the discharge port (13) away from the ground; One end of the partition plate (42) is connected to the sieve plate (41), and the other end is connected to the water absorption plate (43); The discharge plate (44) is connected to the water absorption plate (43).

6. A vacuum drying device for producing polyethylene sheathing material as claimed in claim 5, characterized in that: The discharge plate (44) is provided with a steering shaft (441) at one end and a limiting plate (442) at the other end; The steering shaft (441) is rotatably connected to the housing (1); The housing (1) is provided with a rotating opening (14) on one side close to the ground; The rotation opening (14) corresponds to the limiting plate (442), so that the limiting plate (442) does not interfere with the housing (1) when rotating.

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