PVDF (Polyvinylidene Fluoride) granulation dehydrator

Abstract

The utility model discloses a PVDF (Polyvinylidene Fluoride) granulation dehydrator which comprises a support, a dehydration box is arranged on the support, the dehydration box is of a box body structure with an opening in the lower end, a feeding port is formed in the top of the dehydration box and connected with a feeding pipe, a vertical centrifugal barrel is arranged in the dehydration box, a sealing plate is arranged at the lower end of the centrifugal barrel, and a discharging port is formed in the sealing plate. The centrifugal barrel is a screen drum with meshes distributed in the side wall, a first driving mechanism used for driving the centrifugal barrel to rotate is arranged at the top of the dewatering box, a rotating shaft is coaxially arranged in the centrifugal barrel, the lower end of the rotating shaft is rotationally connected with a bearing seat arranged on the support, and a stirring barrel is coaxially arranged on the rotating shaft; a second driving mechanism used for driving the rotating shaft to rotate is arranged on the support 1, a horizontal beam is arranged on the support below the dewatering box, and an annular liquid receiving groove is formed in the horizontal beam. The centrifugal dewatering device is high in dewatering efficiency, high in centrifugal dewatering efficiency, good in equipment stability, low in noise and high in automation degree, reduces energy consumption of centrifugal dewatering, and saves labor intensity of workers in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of PVDF processing equipment, in particular to a PVDF granulation dehydrator. Background Art

[0002] Polyvinylidene fluoride, abbreviated as PVDF, is a highly non-reactive thermoplastic fluoropolymer. It can be synthesized by the polymerization reaction of 1,1-difluoroethylene. Soluble in strong polar solvents such as dimethylacetamide. It has excellent properties such as anti-aging, chemical resistance, weather resistance, and ultraviolet radiation resistance. It can be used as an engineering plastic for making corrosion-resistant equipment for sealing rings, capacitors, and also as coating materials, insulating materials, and ion exchange membrane materials, etc.

[0003] At present, after PVDF granulation, it needs to be dehydrated. Usually, a centrifugal dehydrator is used for dehydration. The centrifugal dehydrator drives the rotating drum to rotate at a high speed through a clutch. The material is added into the rotating drum from the upper part. Under the action of centrifugal force, it tends to the drum wall. The liquid phase passes through the filter cloth and the drum wall filter holes and is discharged, and the solid phase is intercepted in the rotating drum. After stopping, the material is discharged manually. Manual discharging is time-consuming and laborious. Moreover, the most critical component of the centrifugal dehydrator is the rotating hub. The larger the diameter of the rotating hub, the greater the dehydration processing capacity, but the manufacturing and operation costs are very high, which is uneconomical. In addition, during the centrifugal dehydration process, the PVDF pellets are easy to gather together, making it difficult to have a large feeding amount, resulting in low centrifugal dehydration efficiency. Summary of the Utility Model

[0004] The utility model provides a PVDF granulation dehydrator, which solves the problems of low dehydration efficiency, high manufacturing cost, and time-consuming and laborious discharging of the traditional PVDF centrifugal dehydrator.

[0005] The utility model provides a PVDF granulation dehydrator, including a bracket. A dehydration tank is arranged on the bracket. The dehydration tank is a box structure with an open lower end. The top of the dehydration tank is provided with a feed inlet, and the feed inlet is connected to a feed pipe. A vertical centrifugal cylinder is arranged in the dehydration tank. A sealing plate is arranged at the lower end of the centrifugal cylinder, and a discharge port is arranged on the sealing plate. The centrifugal cylinder is a sieve cylinder with its side wall covered with mesh holes. A first driving mechanism for driving the centrifugal cylinder to rotate is arranged at the top of the dehydration tank. A rotating shaft is coaxially arranged in the centrifugal cylinder. The lower end of the rotating shaft is rotatably connected to a bearing seat arranged on the bracket. A stirring barrel is coaxially arranged on the rotating shaft. A second driving mechanism for driving the rotating shaft to rotate is arranged on the bracket 1. A horizontal beam is arranged on the bracket below the dehydration tank, and an annular liquid receiving groove is arranged on the horizontal beam.

[0006] In the above technical solution, further, the stirring barrel is in the shape of a hexagonal frustum. An axial through hole is arranged along the axial direction of the stirring barrel. The stirring barrel is sleeved on the rotating shaft and fixed through the axial through hole. Six stirring blades are arranged on the six edge sides of the stirring barrel along the circumferential direction. The six stirring blades are arranged in an array along the axial direction of the stirring barrel.

[0007] In the above technical solution, further, a valve is provided at the discharge port, and the valve is an electric valve.

[0008] In the above technical scheme, further, the first driving mechanism includes a first motor and a motor seat, the motor seat is arranged on the top of the dehydration box, the first motor is arranged on the motor seat, and the output shaft of the first motor extends into the dehydration box and is fixedly connected to the centrifuge cylinder through a plurality of support rods; the second driving mechanism includes a second motor and a second coupling, the second motor is arranged on the bracket and is coaxially fixedly connected to the lower end of the rotating shaft through the second coupling.

[0009] In the above technical solution, further, two annular limit rings are coaxially arranged on the outer walls of the upper and lower ends of the centrifugal cylinder, an annular groove is arranged on the outer wall of each limit ring along the circumferential direction, a plurality of wheel seats are arranged along the circumferential direction on the outer side of each annular groove, a roller is arranged on each wheel seat, and each roller portion extends into the annular groove and rolls with the bottom surface of the annular groove.

[0010] In the above technical solution, further, a shock absorbing seat is provided at the bottom of the bracket.

[0011] It can be seen from the above technical solutions that the utility model provides a PVDF granulation and dehydration machine.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Add PVDF pellets into the centrifugal cylinder through the feed port, drive the centrifugal cylinder through the first driving mechanism to drive the PVDF pellets to perform centrifugal motion, so that the PVDF pellets and water stains are quickly separated under the action of centrifugal force, and drive the stirring barrel to rotate through the second driving mechanism to stir the PVDF pellets in the centrifugal cylinder, so that all sides of the PVDF pellets can face outward for centrifugal dehydration, the centrifugal dehydration efficiency is high, and the energy consumption of centrifugal dehydration is reduced;

[0014] 2. By setting a valve at the discharge port, the PVDF pellets in the centrifugal cylinder can be automatically discharged, which increases the discharge efficiency and saves labor intensity;

[0015] 3. By coaxially arranging two annular limiting rings on the upper and lower outer walls of the centrifugal cylinder and cooperating with the rollers arranged on the inner wall of the dehydration box to guide and limit, the stability of the rotation of the centrifugal cylinder is increased and the noise generation is reduced.

[0016] 4. By setting a shock-absorbing seat at the bottom of the bracket, the centrifugal cylinder is prevented from generating large shaking and noise during centrifugal rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] To more clearly illustrate the technical solution of the present utility model, the accompanying drawings required for use in the implementation cases will be briefly introduced below. Obviously, for those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings without creative labor.

[0018] Figure 1 It is a schematic diagram of the overall structure of a PVDF granulation dehydrator proposed by the present utility model;

[0019] Figure 2 Attached to the present utility model Figure 1 It is a partially enlarged schematic diagram of the structure at position I;

[0020] Figure 3 It is a three-dimensional structure schematic diagram of the stirring barrel and stirring blades of a PVDF granulation dehydrator proposed by the present utility model.

[0021] In the figure:

[0022] 1 - Support;

[0023] 2 - Dewatering tank; 21 - Feed inlet; 22 - Feed pipe; 23 - Horizontal beam;

[0024] 3 - Centrifugal cylinder; 30 - Sealing plate; 31 - Rotating shaft; 32 - Stirring barrel; 33 - Stirring blades; 301 - Discharge port; 302 - Valve;

[0025] 4 - First driving mechanism; 41 - First motor; 42 - Motor base; 43 - Support rod;

[0026] 5 - Second driving mechanism; 51 - Second motor; 52 - Second coupling;

[0027] 6 - Annular liquid receiving tank;

[0028] 7 - Limit ring; 71 - Annular groove; 72 - Wheel seat; 73 - Roller;

[0029] 8 - Shock absorber seat. Specific implementation manners

[0030] In order to enable those in the technical field to better understand the technical solution in the present utility model, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] Embodiment 1:

[0032] See Figures 1 - 3A PVDF granulation dehydration machine includes a bracket 1, which is a three-dimensional steel frame with four legs at the bottom. A dehydration box 2 is arranged on the bracket 1. The dehydration box 2 is a box structure with an upper end and surrounding parts closed and a lower end open. A feed port 21 is arranged on the top of the dehydration box 2, and the feed port 21 is connected to a feed pipe 22. A vertical centrifugal cylinder 3 is arranged in the dehydration box 2. A dehydration cavity is formed between the inner wall of the dehydration box 2 and the outer wall of the centrifugal cylinder 3. The upper end of the centrifugal cylinder 3 is arranged to be open, and the feed port 21 is located just above the open end of the centrifugal cylinder 3, so that the PVDF pellets can be easily fed from the centrifugal cylinder 3. The centrifugal cylinder 3 is opened and added into the centrifugal cylinder 3. A sealing plate 30 is provided at the lower end of the centrifugal cylinder 3 to seal the lower end. A discharge port 301 is provided on the sealing plate 30. The centrifugal cylinder 3 is a screen cylinder with mesh holes on the side wall, so that when the centrifugal cylinder 3 rotates at a high speed, the water stains in the centrifugal cylinder 3 can pass through the mesh holes on the centrifugal cylinder 3 and enter the dehydration cavity to quickly separate from the PVDF pellets. A first driving mechanism 4 for driving the centrifugal cylinder 3 to rotate is provided on the top of the dehydration box 2. The centrifugal cylinder 3 is driven by the first driving mechanism 4 to drive the PVDF pellets to perform centrifugal motion, so that the PVDF pellets and the water stains are separated. Under the action of centrifugal force, rapid separation is achieved. A rotating shaft 31 is coaxially arranged in the centrifugal cylinder 3. The lower end of the rotating shaft 31 is rotatably connected to a bearing seat arranged on the bracket 1. A stirring barrel 32 is coaxially arranged on the rotating shaft 31. The bracket 1 is provided with a second driving mechanism 5 for driving the rotating shaft 31 to rotate. The stirring barrel 32 is driven to rotate by the second driving mechanism 5 to stir the PVDF pellets in the centrifugal cylinder 3, so that all surfaces of the PVDF pellets can face outward for centrifugal dehydration. A horizontal beam 23 is arranged on the bracket 1 below the dehydration box 2. An annular liquid receiving tank 6 is arranged on the horizontal beam 23. The annular liquid receiving groove 6 is convenient for quickly collecting water stains separated from PVDF pellets to avoid wasting water resources. PVDF pellets are added into the centrifugal cylinder 3 through the feed port 21, and the centrifugal cylinder 3 is driven by the first driving mechanism 4 to drive the PVDF pellets to perform centrifugal motion, so that the PVDF pellets and the water stains are quickly separated under the action of centrifugal force. The stirring barrel 32 is driven by the second driving mechanism 5 to rotate to stir the PVDF pellets in the centrifugal cylinder 3, so that all sides of the PVDF pellets can face outward for centrifugal dehydration, the centrifugal dehydration efficiency is high, and the energy consumption of centrifugal dehydration is reduced.

[0033] In this embodiment, see Figure 1 , 3, preferably, the stirring barrel 32 is in the shape of a hexagonal frustum, which is convenient for stirring the PVDF pellets in the centrifugal cylinder 3. The stirring barrel 32 is provided with an axial through hole along the axial direction. The stirring barrel 32 is sleeved on the rotating shaft 31 and fixed through the axial through hole. Six stirring blades 33 are arranged on the six edge sides of the stirring barrel 32 along the circumferential direction. The six stirring blades 33 are arranged in an array along the axial direction of the stirring barrel 32. Through the stirring blades 33, the PVDF pellets at the upper and lower positions in the centrifugal cylinder 3 can be turned over and stirred, increasing the uniformity of the PVDF pellets in the centrifugal cylinder 3, making the weight distribution in the centrifugal cylinder 3 uniform, and preventing the centrifugal cylinder 3 from malfunctioning due to long-term uneven force.

[0034] In this embodiment, referring to Figure 1 , a valve 302 is provided at the discharge port 301. The valve 302 is preferably an electric valve, and the valve 302 is remotely controlled by a terminal controller to automatically discharge the PVDF pellets in the centrifugal cylinder 3, increasing the discharging efficiency and saving the labor intensity of workers.

[0035] In this embodiment, referring to Figure 1 , the first driving mechanism 4 includes a first motor 41 and a motor base 42. The motor base 42 is arranged on the top of the dehydration tank 2. The first motor 41 is arranged on the motor base 42. The first motor 41 is a servo motor. The output shaft of the first motor 41 extends into the dehydration tank 2 and is fixedly connected to the centrifugal cylinder 3 through a plurality of support rods 43. The plurality of support rods 43 are distributed radially along the output shaft of the first motor 41 and fixedly connect the output shaft of the first motor 41 to the inner side wall of the centrifugal cylinder 3, so that the centrifugal cylinder 3 can be driven to rotate coaxially during the rotation of the output shaft of the first motor 41; the second driving mechanism 5 includes a second motor 51 and a second coupling 52. The second motor 51 is a servo motor. The second motor 51 is arranged on the bracket 1 and is coaxially and fixedly connected to the lower end of the rotating shaft 31 through the second coupling 52. By driving the output shaft of the first motor 41 to drive the centrifugal cylinder 3 to rotate coaxially, it can rotate forward or backward, so that each irregular surface of the PVDF pellets has the opportunity to face the side wall of the centrifugal cylinder 3 to quickly separate the water stains. By driving the output shaft of the second motor 51 to drive the second coupling 52 and the rotating shaft 31 to rotate coaxially, the rotating shaft 31 drives the stirring barrel 32 to rotate during the rotation process, and the stirring barrel 32 drives the stirring blades 33 to rotate along the circumferential direction to stir the PVDF pellets in the centrifugal cylinder 3. In addition, the second motor 51 drives the output shaft to drive the stirring barrel 32 to rotate in the reverse direction, and the stirring barrel 32 drives the stirring blades 33 to rotate along the circumferential direction to reversely stir the PVDF pellets in the centrifugal cylinder 3, increasing the uniformity of the PVDF pellets, increasing the dehydration efficiency, and at the same time helping to increase the discharging speed of the pellets at the discharge port 301.

[0036] In this embodiment, referring to Figure 1 、 2Two annular limiting rings 7 are coaxially arranged on the outer walls of the upper and lower ends of the centrifugal cylinder 3. An annular groove 71 is arranged on the outer wall of each limiting ring 7 along the circumferential direction. A plurality of wheel seats 72 are arranged on the inner wall of the dehydration box 2 outside each annular groove 71 along the circumferential direction. A roller 73 is arranged on each wheel seat 72. Each roller 73 partially extends into the annular groove 71 and rolls with the bottom surface of the annular groove 71. During the rotation of the centrifugal cylinder 3, the multiple rollers 73 guide the rotation in the annular groove 71, thereby increasing the stability of the rotation of the centrifugal cylinder 3 and reducing the generation of noise.

[0037] In this embodiment, see Figure 1 A shock absorbing seat 8 is arranged at the bottom of the bracket 1. The shock absorbing seat 8 is an existing commercially available device. The shock absorbing seat 8 is arranged to prevent the centrifugal cylinder 3 from shaking greatly during the centrifugal rotation process.

[0038] It can be seen from the above technical scheme that when in use, PVDF pellets are added into the centrifugal cylinder 3 through the feed port 21, and then the first motor 41 is controlled by the controller to drive its output shaft to drive the centrifugal cylinder 3 to rotate coaxially. After dehydration for a certain period of time, the second motor 51 is driven by its output shaft to drive the second coupling 52 and the rotating shaft 31 to rotate coaxially. During the rotation of the rotating shaft 31, the stirring barrel 32 is driven to rotate. During the rotation of the stirring barrel 32, the stirring blades 33 are driven to rotate in a circumferential direction to stir the PVDF pellets in the centrifugal cylinder 3, and then the first motor 41 is continued to drive its output shaft to drive the centrifugal cylinder 3 to rotate coaxially for dehydration. After dehydration is completed, the valve 302 set at the discharge port 301 is opened by the terminal controller to discharge the PVDF pellets. At the same time, the second motor 51 is driven by its output shaft to drive the stirring barrel 32 to rotate in the opposite direction to gather the PVDF pellets at the discharge port 301 for auxiliary unloading.

[0039] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model disclosed herein. The present invention is intended to cover any variation, use or adaptation of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not disclosed in the present invention. The specification and examples are to be regarded as exemplary only, and the true scope of the present invention is indicated by the claims.

[0040] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The above-described embodiments of the present invention do not constitute a limitation on the scope of protection of the present invention.

Claims

1. A PVDF granulation dehydrator, characterized in that: The invention comprises a support (1), wherein a dehydration box (2) is arranged on the support (1), wherein the dehydration box (2) is a box structure with an open lower end, wherein a feed port (21) is arranged on the top of the dehydration box (2), wherein the feed port (21) is connected to a feed pipe (22), wherein a vertical centrifugal cylinder (3) is arranged in the dehydration box (2), wherein a sealing plate (30) is arranged at the lower end of the centrifugal cylinder (3), wherein a discharge port (301) is arranged on the sealing plate (30), wherein the centrifugal cylinder (3) is a sieve cylinder with side walls covered with mesh holes, and wherein a driving device (24) is arranged on the top of the dehydration box (2). A first driving mechanism (4) for rotating the centrifugal cylinder (3); a rotating shaft (31) is coaxially arranged inside the centrifugal cylinder (3); the lower end of the rotating shaft (31) is rotatably connected to a bearing seat arranged on the bracket (1); a stirring barrel (32) is coaxially arranged on the rotating shaft (31); a second driving mechanism (5) for driving the rotating shaft (31) to rotate is arranged on the bracket (1); a horizontal beam (23) is arranged on the bracket (1) below the dehydration box (2); and an annular liquid receiving groove (6) is arranged on the horizontal beam (23).

2. The PVDF granulation dehydrator according to claim 1, wherein, The stirring barrel (32) is in the shape of a hexagonal pyramid. An axial through hole is arranged along the axis direction of the stirring barrel (32). The stirring barrel (32) is sleeved on the rotating shaft (31) and fixed through the axial through hole. Six stirring blades (33) are arranged along the circumferential direction on the six edge sides of the stirring barrel (32). The six stirring blades (33) are distributed in an array along the axial direction of the stirring barrel (32).

3. The PVDF granulation dehydrator according to claim 1, characterized in that, The discharge port (301) is provided with a valve (302), and the valve (302) is an electric valve.

4. The PVDF granulation dehydrator according to claim 1, wherein, The first driving mechanism (4) comprises a first motor (41) and a motor seat (42); the motor seat (42) is arranged on the top of the dehydration box (2); the first motor (41) is arranged on the motor seat (42); the output shaft of the first motor (41) extends into the dehydration box (2) and is fixedly connected to the centrifugal cylinder (3) through a plurality of support rods (43); the second driving mechanism (5) comprises a second motor (51) and a second coupling (52); the second motor (51) is arranged on the bracket (1) and is coaxially fixedly connected to the lower end of the rotating shaft (31) through the second coupling (52).

5. A PVDF granulation dehydrator according to claim 1, characterized in that, Two annular limiting rings (7) are coaxially arranged on the outer walls of the upper and lower ends of the centrifugal cylinder (3); an annular groove (71) is arranged on the outer wall of each limiting ring (7) along the circumferential direction; a plurality of wheel seats (72) are arranged on the outer side of each annular groove (71) along the circumferential direction; a roller (73) is arranged on each wheel seat (72); each roller (73) partially extends into the annular groove (71) and rolls with the bottom surface of the annular groove (71).

6. The PVDF granulation dehydrator according to claim 1, wherein A shock-absorbing seat (8) is arranged at the bottom of the bracket (1).

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