Granulator suitable for polytetrafluoroethylene production

Abstract

The utility model relates to the technical field of polytetrafluoroethylene production, in particular to a pelletizer suitable for polytetrafluoroethylene production, which comprises a pelletizer body, a discharge port arranged on the pelletizer body, a screening and cooling structure arranged below the discharge port, and a cutting mechanism arranged at the top of the screening and cooling structure and matched with the discharge port. The screening and cooling structure comprises a material receiving frame, a cold water jacket is connected to the top end of the material receiving frame, a plurality of screening areas are sequentially arranged on the cold water jacket from the side close to the discharging port to the side away from the discharging port, and a plurality of material guiding and cooling grooves are formed in each screening area. The specifications of the material guiding and cooling grooves in the multiple screening areas are sequentially increased from the side close to the discharging port to the side away from the discharging port, particles can be directly screened, cooling treatment is carried out while screening is carried out, the particles are not in direct contact with water in the cooling process, the phenomenon that the subsequent air drying operation procedure is increased due to the fact that the particles are in direct contact with the water is avoided, and the service life of the particles is prolonged. And cooling energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polytetrafluoroethylene production, in particular to a granulator suitable for polytetrafluoroethylene production. Background Art

[0002] Polytetrafluoroethylene, also known as Teflon, is commonly known as the "king of plastics". It is a high molecular polymer made by polymerizing tetrafluoroethylene as a monomer. It has excellent heat resistance and cold resistance and can be used for a long time at -180 to 260°C. This material is resistant to acids and alkalis, and various organic solvents. It is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance and its friction coefficient is extremely low. Therefore, it can be used as a lubricant and has become an ideal coating for the inner layer of easy-to-clean water pipes. In the production process, a granulator is required to make it into polytetrafluoroethylene particles. After searching, the Chinese patent with the publication number CN219190869U discloses a polytetrafluoroethylene granulator. When it is used, the hot-melt raw material is transported to the solid plate through the granulator body, and the electric push rod is started. The electric push rod pushes the mounting seat and the servo motor to slide, and the servo motor drives the cutting knife to rotate, and the hot-melt raw material extruded from the solid plate is cut into particles, which fall into the square tube and the cooling tank through the groove. Internally, by starting servo motor 2 and servo motor 3 at the same time, servo motor 2 drives the rotating shaft and stirring blades to rotate, and the stirring blades drive the particles to rotate, thereby accelerating the flow of particles and reducing the temperature of particles. Servo motor 3 drives the fan blades to rotate, and external natural wind is delivered to the interior of the cooling tank to further dissipate heat for the particles, thereby avoiding waste of water resources and improving the cooling effect. However, the cut particles are directly dropped into the square tube and the cooling tank for cooling. This cooling method adds a subsequent air-drying operation with high energy consumption. At the same time, it is not convenient to screen particles of different sizes. Since the cut particles may be of different sizes, screening operations are required later. For this reason, a granulator is designed that can directly screen the particles and cool them while screening. The particles are not in direct contact with water during the cooling process, thereby avoiding the increase of subsequent air-drying operations due to direct contact with water, and reducing cooling energy consumption. Utility Model Content

[0003] 1. Technical issues to be solved

[0004] In view of the shortcomings of the prior art, the utility model provides a granulator suitable for the production of polytetrafluoroethylene, which can directly screen the particles and cool them while screening. There is no direct contact with water during the cooling process, thus avoiding the increase of subsequent air-drying operations due to direct contact with water and reducing cooling energy consumption.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a granulator suitable for the production of polytetrafluoroethylene, comprising a granulator body, a discharge port is arranged on the granulator body, a screening and cooling structure is arranged below the discharge port, a cutting mechanism matched with the discharge port is arranged on the top of the screening and cooling structure, the screening and cooling structure comprises a material receiving rack, a cold water jacket is arranged on the top of the material receiving rack, a plurality of screening areas are arranged on the cold water jacket in sequence from the side close to the discharge port to the side far from the discharge port, a plurality of material guiding cooling grooves are arranged in each screening area, the specifications of the material guiding cooling grooves in the plurality of screening areas increase in sequence from the side close to the discharge port to the side far from the discharge port, a material receiving hopper is arranged below each of the screening areas, and a material diverting mechanism is arranged on the top of the cold water jacket.

[0007] Preferably, the material transfer mechanism comprises a conveyor belt wrapped around a material receiving frame, a plurality of material passing troughs are provided on the conveyor belt, a partition bar is provided between two adjacent material passing troughs, and side baffles are fixedly connected to both sides of the plurality of material passing troughs on the conveyor belt.

[0008] Preferably, it also includes a rotating drive component for driving the material receiving rack to rotate, the rotating drive component includes four transmission rollers rotatably connected at the four corners of the material receiving rack, the material receiving rack is mounted on the transmission rollers, and also includes a driving motor fixedly installed at the bottom of the material receiving rack, the output shaft of the driving motor is connected to one of the transmission rollers through a belt 1 transmission connection, and the transmission roller is connected to another transmission roller on the same side of the transmission roller through a belt 2 transmission connection.

[0009] Preferably, the material guiding cooling trough is inclined and the bottom of the material guiding cooling trough is arranged toward a side close to the discharge port.

[0010] Preferably, the cutting mechanism comprises a fixing frame fixedly mounted on the top of the material receiving frame, and a pelletizing knife in contact with the material discharge port is rotatably connected to the fixing frame via a pelletizing motor.

[0011] Preferably, a guide bar adapted to the material receiving hopper is provided at the bottom of the material receiving frame.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a granulator suitable for the production of polytetrafluoroethylene, which has the following beneficial effects:

[0014] The granulator suitable for polytetrafluoroethylene production can conveniently pelletize the polytetrafluoroethylene extruded from the discharge port on the granulator body through a cutting mechanism, and can screen and cool the particles through a screening cooling structure arranged below the discharge port. The cut particles are sequentially passed through a plurality of screening areas through a material-pickling mechanism, and the particles are sequentially passed through the material-guiding cooling grooves in the plurality of screening areas in steps from small to large specifications and fall into a receiving hopper below. Due to the arrangement of the cold water jacket, the particles are cooled at the top of the cold water jacket and when passing through the material-guiding cooling groove, and the particles do not contact water during the process. The granulator suitable for polytetrafluoroethylene production can directly screen the particles, and cool them while screening them. The particles do not directly contact water during the cooling process, thereby avoiding the increase of subsequent air-drying operation procedures due to direct contact with water, and reducing cooling energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model as a whole;

[0016] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 For this utility model Figure 2 A schematic diagram of the local enlarged structure at point A in the middle;

[0018] Figure 4 It is a schematic structural diagram of the utility model from another perspective.

[0019] Markings in the attached drawings: 1. Granulator body; 2. Discharge port; 3. Fixed frame; 4. Granulator motor; 5. Granulator knife; 6. Receiving rack; 7. Conveyor belt; 8. Driving roller; 9. Material chute; 10. Spacer bar; 11. Side baffle; 12. Cold water jacket; 13. Material guide cooling chute; 14. Receiving hopper; 15. Driving motor; 16. Belt 1; 17. Belt 2; 18. Guide strip. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example:

[0022] See also Figure 1-4A granulator suitable for the production of polytetrafluoroethylene includes a granulator body 1, a discharge port 2 is arranged on the granulator body 1, a screening cooling structure is arranged below the discharge port 2, a cutting mechanism adapted to the discharge port 2 is arranged on the top of the screening cooling structure, the screening cooling structure includes a receiving rack 6, a cold water jacket 12 is fixedly connected to the top of the receiving rack 6, a plurality of screening areas are arranged on the cold water jacket 12 from the side close to the discharge port 2 to the side far from the discharge port 2, a plurality of material guiding cooling grooves 13 are arranged in each screening area, and the specifications of the material guiding cooling grooves 13 in the plurality of screening areas increase in sequence from the side close to the discharge port 2 to the side far from the discharge port 2, a material receiving hopper 14 is arranged below each screening area, and a material diverting mechanism is arranged on the top of the cold water jacket 12.

[0023] Specifically, the material selection mechanism includes a conveyor belt 7 wrapped around the material receiving rack 6, a plurality of material troughs 9 are provided on the conveyor belt 7, a partition bar 10 is provided between two adjacent material troughs 9, and side baffles 11 are fixedly connected on both sides of the plurality of material troughs 9 on the conveyor belt 7. The material receiving rack 6 rotates, thereby driving the material troughs 9 and the plurality of partition bars 10 to rotate, and the particles are horizontally transported on the cold water jacket 12 through the side baffles 11, and the particles are conveniently dropped into the cold water jacket 12 below through the material troughs 9. The two side baffles 11 on both sides facilitate the shielding of the particles to avoid falling out from the sides of the material receiving rack 6, thereby ensuring that the particles are concentrated and fall into the plurality of material guiding cooling troughs 13 through the top of the cold water jacket 12.

[0024] Specifically, it also includes a rotary drive component for driving the material receiving rack 6 to rotate, and the rotary drive component includes four transmission rollers 8 rotatably connected to the four corners of the material receiving rack 6, and the material receiving rack 6 is mounted on the transmission rollers 8. It also includes a drive motor 15 fixedly installed at the bottom of the material receiving rack 6, and the output shaft of the drive motor 15 is connected to one of the transmission rollers 8 through a belt 16, and the transmission roller 8 is connected to another transmission roller 8 on the same side through a belt 2 17. Start the drive motor 15 to rotate the output shaft of the drive motor 15. Through the cooperation of the belt 1 16 and the belt 2 17, it is convenient to drive the two transmission rollers 8 to rotate, thereby improving the transmission stability of the material receiving rack 6, thereby ensuring the rotation of the material receiving rack 6.

[0025] Specifically, the material guiding cooling groove 13 is inclined and the bottom of the material guiding cooling groove 13 is arranged toward the side close to the discharge port 2. By arranging the material guiding cooling groove 13 in an inclined manner, the length of the cooling channel is increased, so that the cooling is more thorough.

[0026] Specifically, the cutting mechanism includes a fixed frame 3 fixedly installed on the top of the receiving frame 6, and a pelletizer 5 in contact with the discharge port 2 is rotatably connected to the fixed frame 3 through a pelletizer motor 4. The pelletizer motor 4 is started to drive the pelletizer knife 5 to rotate, so that the polytetrafluoroethylene particles extruded from the discharge port 2 can be cut off.

[0027] Specifically, a guide bar 18 adapted to the receiving hopper 14 is provided at the bottom of the receiving frame 6 . The setting of the guide bar 18 facilitates the guidance of the receiving hopper 14 .

[0028] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0029] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0030] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0031] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A granulator suitable for the production of polytetrafluoroethylene, comprising a granulator body (1), wherein the granulator body (1) is provided with a discharge port (2), characterized in that: A screening cooling structure is arranged below the discharge port (2), a cutting mechanism matched with the discharge port (2) is arranged on the top of the screening cooling structure, the screening cooling structure comprises a receiving rack (6), a cold water jacket (12) is arranged on the top of the receiving rack (6), a plurality of screening areas are arranged on the cold water jacket (12) from the side close to the discharge port (2) to the side far from the discharge port (2), each screening area is provided with a plurality of material guiding cooling grooves (13), the specifications of the material guiding cooling grooves (13) in the plurality of screening areas are increased in sequence from the side close to the discharge port (2) to the side far from the discharge port (2), a receiving hopper (14) is arranged below each of the screening areas, and a material dispensing mechanism is arranged on the top of the cold water jacket (12).

2. The granulator suitable for polytetrafluoroethylene production according to claim 1, characterized in that: The material-selecting mechanism comprises a conveyor belt (7) wrapped around a material receiving frame (6), a plurality of material-passing grooves (9) are provided on the conveyor belt (7), a partition bar (10) is provided between two adjacent material-passing grooves (9), and side baffles (11) are fixedly connected to both sides of the plurality of material-passing grooves (9) on the conveyor belt (7).

3. The granulator suitable for polytetrafluoroethylene production according to claim 2, characterized in that: It also includes a rotary drive assembly for driving the material receiving frame (6) to rotate, the rotary drive assembly includes four transmission rollers (8) rotatably connected to the four corners of the material receiving frame (6), the material receiving frame (6) is sleeved on the transmission rollers (8), and also includes a drive motor (15) fixedly installed at the bottom of the material receiving frame (6), the output shaft of the drive motor (15) is connected to one of the transmission rollers (8) through a belt 1 (16), and the transmission roller (8) is connected to another transmission roller (8) on the same side through a belt 2 (17).

4. The granulator suitable for polytetrafluoroethylene production according to claim 3, characterized in that: The material guiding cooling groove (13) is inclined and the bottom of the material guiding cooling groove (13) is arranged toward a side close to the material discharge port (2).

5. The granulator suitable for polytetrafluoroethylene production according to claim 4, characterized in that: The cutting mechanism comprises a fixed frame (3) fixedly mounted on the top of a material receiving frame (6), and a pelletizing knife (5) in contact with a material outlet (2) is rotatably connected to the fixed frame (3) via a pelletizing motor (4).

6. The granulator suitable for polytetrafluoroethylene production according to claim 5, characterized in that: The bottom of the material receiving frame (6) is provided with a guide bar (18) adapted to the material receiving hopper (14).

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