Polytetrafluoroethylene vacuum special oven

Abstract

The utility model discloses a polytetrafluoroethylene special oven of vacuumizing, including chassis, bearing frame and drying cylinder, the both sides of chassis are welded with a side support board respectively, and one of side support boards is fixed with servo motor. Advantageous effect: be provided with chassis, bearing frame, side support board, servo motor, inclination adjustment frame, drying cylinder, displacement sensor, slope, PLC controller, start servo motor work through servo controller, promote servo motor according to the fixed angle of rotation angle counterclockwise rotation, and then servo motor output end drives chassis counterclockwise through inclination adjustment frame, make the drying cylinder on bearing frame lean to left side, when the displacement of displacement sensor detection reaches the preset value of PLC controller, and then the hydraulic cylinder of slope is started by PLC controller and stretches, makes the contact block of hydraulic cylinder top and bearing frame bottom meet, adopts this mode, can realize the drying cylinder discharge end inclination of horizontal arrangement, reaches the effect of full discharge.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically to a vacuum drying oven for polytetrafluoroethylene. Background Technology

[0002] PTFE is widely used in many industrial fields due to its excellent corrosion resistance, high temperature resistance and insulation properties. However, its unique physical and chemical properties also require drying equipment to have specific performance characteristics. Vacuum rake dryers are drying equipment specifically designed for processing special materials such as polytetrafluoroethylene (PTFE). Vacuum rake dryers are needed for PTFE drying because the equipment can operate under vacuum conditions, significantly reducing the boiling point of water and achieving drying at lower temperatures, thereby protecting the heat-sensitive components in PTFE from damage. Vacuum rake dryers are widely used in the production of PTFE pipes.

[0003] However, the rake dryers commonly found on the market are usually placed horizontally or vertically, which makes it easy for material residue to remain when the dryer discharges. This residue is difficult for workers to clean and recycle, affecting the subsequent drying process. Therefore, it is necessary to solve this technical problem. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a special vacuum drying oven for polytetrafluoroethylene, which has the advantages of convenient and thorough material discharge, thereby solving the problems mentioned in the background technology.

[0006] (II) Technical Solution

[0007] To achieve the aforementioned advantages of convenient and thorough material discharge, the specific technical solution adopted by this utility model is as follows: A special vacuum drying oven for polytetrafluoroethylene includes a base frame, a support frame, and a drying cylinder. A side support plate is welded to each side of the base frame, and a servo motor is fixed to one of the side support plates. A PLC controller is mounted on the surface of one of the side support plates. A tilt adjustment frame is fixed to the output end of the servo motor, and the support frame is bolted to the top of the tilt adjustment frame. Two bearing seats are fixed to the top of the support frame, and a drying cylinder is installed between the two bearing seats. A stirring shaft is connected inside the drying cylinder via bearings, and both ends of the stirring shaft are respectively connected to two... The drying cylinder is rotatably connected to a shaft seat. A heating shell is fitted on the outer surface of the drying cylinder, and several annular heaters are installed at equal intervals inside the heating shell. The upper right end of the drying cylinder is connected to a feed nozzle, and the lower left end of the drying cylinder is connected to a discharge nozzle. The upper left end of the drying cylinder is connected to a filter cover, and a vacuum pipe connected to an external vacuum pump is provided on the filter cover. A geared motor is fixed to the right end of the support frame, and the output end of the geared motor is fixedly connected to the stirring shaft through a coupling. A displacement sensor and a ramp are installed sequentially from left to right on the top surface of the base frame. A hydraulic cylinder is fixedly installed on the ramp, and a contact block is fixed to the top of the hydraulic cylinder.

[0008] Furthermore, the surface of the stirring shaft is provided with several sets of stirring rods at equal intervals, and the periphery of the several sets of stirring rods is provided with a stirring frame connected to the stirring shaft. The stirring frame of the stirring shaft is provided with stirring scrapers that are in contact with the inner wall of the drying cylinder.

[0009] Furthermore, a connecting shaft is fixed to the side of the tilt adjustment frame, and the connecting shaft is rotatably connected to another side support plate through a bearing seat. The axis of the connecting shaft is on the same straight line as the axis of the servo motor output end.

[0010] Furthermore, two pins are inserted and installed on one of the support plates of the base frame, and two slots are opened on the side of the support frame corresponding to the pins, with one end of each pin being inserted into the two slots opened on the side of the support frame.

[0011] Furthermore, the output terminal of the PLC controller is electrically connected to the hydraulic cylinder, and the displacement sensor is electrically connected to the PLC controller.

[0012] Furthermore, two sets of hydraulic cylinders and contact blocks are provided, and both sets of hydraulic cylinders and contact blocks are installed at an angle on the slope surface of the ramp.

[0013] Furthermore, a filter screen is installed at the connection between the filter cover and the drying cylinder, and the filter cover is connected to the vacuum pipe. The feed nozzle of the drying cylinder forms an inlet for powdered or granular polytetrafluoroethylene, and the discharge nozzle of the drying cylinder forms an outlet for powdered or granular polytetrafluoroethylene.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a special vacuum drying oven for polytetrafluoroethylene, which has the following beneficial effects:

[0016] (1) This utility model is equipped with a base frame, a support frame, a side support plate, a servo motor, an angle adjustment frame, a drying cylinder, a displacement sensor, a ramp, and a PLC controller. The servo motor is started by the servo controller, which causes the servo motor to rotate counterclockwise by a fixed angle according to the set rotation angle. Then, the output end of the servo motor drives the base frame to rotate counterclockwise through the angle adjustment frame, so that the drying cylinder on the support frame tilts to the left. When the displacement detected by the displacement sensor reaches the preset value of the PLC controller, the PLC controller starts the hydraulic cylinder of the ramp to extend, so that the contact block at the top of the hydraulic cylinder connects with the bottom of the support frame. In this way, the discharge end of the horizontally arranged drying cylinder can be tilted to achieve the effect of full discharge and facilitate the subsequent drying process of materials.

[0017] (2) This utility model uses a heating shell installed on the outer surface of the drying cylinder, and several annular heaters are installed at equal intervals inside the heating shell. The two ends of the stirring shaft inside the drying cylinder are rotatably connected to two shaft seats. As the geared motor drives the stirring shaft fixed at its output end to rotate, it causes several sets of stirring rods on the surface of the stirring shaft and several sets of stirring frames fixed around the stirring rods to rotate, so that the powdered or granular polytetrafluoroethylene is evenly dispersed and stirred in the drying cylinder. Combined with the several annular heaters evenly arranged inside the heating shell, it is easy to connect the vacuum pipe on the filter cover to the external vacuum pump. While ensuring the uniform dispersion of polytetrafluoroethylene, it also achieves the full drying of polytetrafluoroethylene. Moreover, the vacuum method is beneficial to protect the heat-sensitive components in PTFE from damage, which is beneficial to improving the production quality of subsequent polytetrafluoroethylene products. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the external structure of a polytetrafluoroethylene vacuum drying oven according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of a polytetrafluoroethylene vacuum drying oven according to an embodiment of the present invention;

[0021] Figure 3 This is a left view of the entire application.

[0022] In the picture:

[0023] 1. Base frame; 2. Bearing frame; 3. Side support plate; 4. Servo motor; 5. Tilt adjustment frame; 6. Shaft seat; 7. Drying cylinder; 8. Stirring shaft; 9. Discharge nozzle; 10. Heating shell; 11. Filter cover; 12. Vacuum pipe; 13. Gear motor; 14. Slope; 15. Hydraulic cylinder; 16. Displacement sensor; 17. Feed nozzle; 18. PLC controller; 19. Contact block; 20. Ring heater; 21. Stirring scraper; 22. Stirring rod; 23. Slot; 24. Pin; 25. Connecting shaft. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0025] According to an embodiment of this utility model, a special vacuum drying oven for polytetrafluoroethylene is provided.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-3As shown, the PTFE vacuum drying oven according to an embodiment of this utility model includes a base frame 1, a support frame 2, and a drying cylinder 7. A side support plate 3 is welded to each side of the base frame 1, and a servo motor 4 is fixed on one of the side support plates 3. A PLC controller 18 is mounted on the surface of one of the side support plates 3. An angle adjustment frame 5 is fixed to the output end of the servo motor 4, and the support frame 2 is bolted to the top of the angle adjustment frame 5. Two bearing seats 6 are fixed to the top of the support frame 2, and the drying cylinder 7 is installed between the two bearing seats 6. A stirring shaft 8 is connected to the drying cylinder 7 via bearings, and both ends of the stirring shaft 8 are rotatably connected to the two bearing seats 6. A heating shell 10 is fitted onto the outer surface of the drying cylinder 7, and several annular heaters 20 are installed at equal intervals inside the heating shell 10. A feed nozzle 17 is connected to the upper right end of the drying cylinder 7, and a discharge nozzle 9 is connected to the lower left end of the drying cylinder 7. The upper part of the left end of the drying cylinder 7 is connected to a filter cover 11, and a vacuum pipe 12 connected to an external vacuum pump is provided on the filter cover 11. A geared motor 13 is fixed to the right end of the support frame 2, and the output end of the geared motor 13 is fixedly connected to the stirring shaft 8 through a coupling. A displacement sensor 16 and a ramp 14 are installed sequentially from left to right on the top surface of the base frame 1. A hydraulic cylinder 15 is fixedly installed on the ramp 14, and a contact block 19 is fixed to the top of the hydraulic cylinder 15. In order to meet the temperature control requirements during the drying stage, this device is also equipped with a temperature sensor and a temperature controller corresponding to the annular heater 20 of the heating shell 10. The temperature data fed back to the temperature controller by the temperature sensor facilitates the control of the power supply of the annular heater 20 to achieve the effect of temperature control. The specific details are known prior art and will not be described in detail. The contents of the vacuum rake dryer not described in detail in this specification are known prior art to those skilled in the art.

[0027] In one embodiment, a plurality of stirring rods 22 are evenly spaced on the surface of the stirring shaft 8, and a stirring frame connected to the stirring shaft 8 is provided around the plurality of stirring rods 22. A stirring scraper 21 connected to the inner wall of the drying cylinder 7 is provided on the stirring frame of the stirring shaft 8. With this structure, combined with a plurality of annular heaters 20 evenly spaced inside the heating shell 10, the polytetrafluoroethylene is fully dried while ensuring uniform dispersion of polytetrafluoroethylene.

[0028] In one embodiment, a connecting shaft 25 is fixed to the side of the tilt adjustment frame 5, and the connecting shaft 25 is rotatably connected to another side support plate 3 through a bearing seat. The axis of the connecting shaft 25 is on the same straight line as the axis of the output end of the servo motor 4. With this structure, the tilt adjustment frame 5 can rotate reliably.

[0029] In one embodiment, two pins 24 are inserted and installed on one of the support plates of the base frame 1. Two slots 23 are opened on the side of the support frame 2 corresponding to the pins 24. One end of the two pins 24 is inserted into the two slots 23 opened on the side of the support frame 2. With this structure, it is easy to insert and support the horizontally arranged drying cylinder 7.

[0030] In one embodiment, the output of the PLC controller 18 is electrically connected to the hydraulic cylinder 15, and the displacement sensor 16 is electrically connected to the PLC controller 18. In this way, the hydraulic cylinder 15 can be automatically activated to provide support for the support frame 2 during the tilting phase.

[0031] In one embodiment, two sets of hydraulic cylinders 15 and contact blocks 19 are provided, and both sets of hydraulic cylinders 15 and contact blocks 19 are installed at an angle on the slope surface of the ramp 14. The extension and retraction of the two hydraulic cylinders 15 may be asynchronous, but the extension length of the two hydraulic cylinders 15 is the same.

[0032] In one embodiment, a filter screen is installed at the connection between the filter cover 11 and the drying cylinder 7, and the filter cover 11 is connected to the vacuum pipe 12. The feed nozzle 17 of the drying cylinder 7 forms an inlet for powdered or granular polytetrafluoroethylene, and the discharge nozzle 9 of the drying cylinder 7 forms an outlet for powdered or granular polytetrafluoroethylene. This structure facilitates the drying of powdered or granular polytetrafluoroethylene and reduces the loss of material during the vacuuming stage.

[0033] Working principle: First, powdered or granular polytetrafluoroethylene (PTFE) is fed into the drying cylinder 7 through the feed nozzle 17, and the feed nozzle 17 and discharge nozzle 9 are sealed. Then, the vacuum pipe 12 on the filter cover 11 is connected to an external vacuum pump to evacuate the drying cylinder 7. During drying, the geared motor 13 drives the fixed stirring shaft 8 at its output end to rotate, causing several sets of stirring rods 22 on the surface of the stirring shaft 8 and the stirring frame fixed around the stirring rods 22 to rotate, so that the powdered or granular PTFE is evenly dispersed and stirred in the drying cylinder 7. Combined with several annular heaters 20 evenly arranged in the heating shell 10, the PTFE is fully dried while ensuring uniform dispersion. When discharging, the traction side support... The pin 24 inserted on plate 3 disengages from the slot 23 on the side of the support frame 2. The servo motor 4 is started by the servo controller, causing the servo motor 4 to rotate counterclockwise by a fixed angle according to the set rotation angle. Then, the output end of the servo motor 4 drives the base frame 1 to rotate counterclockwise through the tilt adjustment frame 5, causing the drying cylinder 7 on the support frame 2 to tilt to the left. When the displacement detected by the displacement sensor 16 reaches the preset value of the PLC controller 18, the PLC controller 18 starts the hydraulic cylinder 15 of the ramp 14 to extend, so that the contact block 19 at the top of the hydraulic cylinder 15 contacts the bottom of the support frame 2, providing support for the tilted drying cylinder 7, until the dried powdery or granular polytetrafluoroethylene is discharged through the discharge nozzle 9.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum drying oven for PTFE, comprising a base frame (1), a bearing frame (2) and a drying cylinder (7), characterized in that, A side support plate (3) is welded to each side of the base frame (1), and a servo motor (4) is fixed on one of the side support plates (3). A PLC controller (18) is installed on the surface of one of the side support plates (3). An angle adjustment bracket (5) is fixed to the output end of the servo motor (4), and a bearing frame (2) is fixed to the top of the angle adjustment bracket (5) by bolts. Two bearing seats (6) are fixed to the top of the bearing frame (2), and a drying cylinder (7) is installed between the two bearing seats (6). A stirring shaft (8) is connected to the drying cylinder (7) through bearings, and the two ends of the stirring shaft (8) are rotatably connected to the two bearing seats (6) respectively. A heating shell (10) is fitted on the outer surface of the drying cylinder (7), and the heating shell (10) is evenly spaced inside. The drying cylinder (7) is equipped with several annular heaters (20). The upper right end of the drying cylinder (7) is connected to the feed nozzle (17), and the lower left end of the drying cylinder (7) is connected to the discharge nozzle (9). The upper left end of the drying cylinder (7) is connected to the filter cover (11), and the filter cover (11) is equipped with a vacuum pipe (12) connected to an external vacuum pump. The right end of the support frame (2) is fixed with a reduction motor (13), and the output end of the reduction motor (13) is fixedly connected to the stirring shaft (8) through a coupling. The top surface of the base frame (1) is equipped with a displacement sensor (16) and a ramp (14) from left to right. A hydraulic cylinder (15) is fixedly installed on the ramp (14), and a contact block (19) is fixed on the top of the hydraulic cylinder (15).

2. The PTFE vacuum oven of claim 1, wherein, The surface of the stirring shaft (8) is provided with a number of stirring rods (22) at equal intervals, and the periphery of the number of stirring rods (22) is provided with a stirring frame connected to the stirring shaft (8). The stirring frame of the stirring shaft (8) is provided with a stirring scraper (21) that is connected to the inner wall of the drying cylinder (7).

3. The PTFE vacuum-only oven of claim 1, wherein, The tilt adjustment frame (5) has a connecting shaft (25) fixed on its side, and the connecting shaft (25) is rotatably connected to another side support plate (3) through a bearing seat. The axis of the connecting shaft (25) is on the same straight line as the axis of the output end of the servo motor (4).

4. The PTFE vacuum oven of claim 1, wherein, Two pins (24) are inserted and installed on one of the support plates of the base frame (1). Two slots (23) are opened on the side of the support frame (2) corresponding to the pins (24). One end of the two pins (24) is inserted into the two slots (23) opened on the side of the support frame (2).

5. The PTFE vacuum oven of claim 1, wherein, The output terminal of the PLC controller (18) is electrically connected to the hydraulic cylinder (15), and the displacement sensor (16) is electrically connected to the PLC controller (18).

6. The PTFE vacuum oven of claim 1, wherein, Two sets of hydraulic cylinders (15) and contact blocks (19) are provided, and both sets of hydraulic cylinders (15) and contact blocks (19) are installed at an incline on the slope surface of the ramp (14).

7. The PTFE vacuum oven of claim 1, wherein, A filter screen is installed at the connection between the filter cover (11) and the drying cylinder (7), and the filter cover (11) is connected to the vacuum pipe (12). The feed nozzle (17) of the drying cylinder (7) forms a feed port for powdery or granular polytetrafluoroethylene, and the discharge nozzle (9) of the drying cylinder (7) forms a discharge port for powdery or granular polytetrafluoroethylene.

Images