Rapid cooling device for polytetrafluoroethylene tube

Through the design of the cooling box, coolant spraying and discharge air drying mechanism, the problem of low cooling efficiency of polytetrafluoroethylene pipes is solved, and the effect of rapid cooling and automatic discharge is achieved.

CN223199366UActive Publication Date: 2025-08-08ZIBO KUNPENG ANTISEPSIS EQUIP CO LTD
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Patent Information

Application Number
CN202422515725.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-17
Publication Date
2025-08-08
Estimated Expiration
2034-10-17

AI Technical Summary

Technical Problem

The existing polytetrafluoroethylene pipe cooling device has low cooling efficiency through air cooling, resulting in low production efficiency.

Method used

The combination design of the cooling box, the coolant inclined spray box, the liquid extraction pump and the placement roller is adopted to make the polytetrafluoroethylene tube shake and rotate in the rolling state, and the cooling is quickly cooled by the spraying of the coolant. At the same time, the automatic rapid discharge and secondary air drying are achieved through the cooperation of the discharge mechanism and the discharge air drying mechanism.

Benefits of technology

The cooling efficiency of the polytetrafluoroethylene tube is improved, and the coolant is prevented from adhesion through secondary air drying, thereby achieving efficient cooling and discharge processes.

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Patent Text Reader

Abstract

The utility model discloses a rapid cooling device for a polytetrafluoroethylene tube, which relates to the technical field of polytetrafluoroethylene tube processing equipment and comprises a cooling mechanism, a discharging air-drying mechanism is arranged on the right side of the cooling mechanism, the cooling mechanism comprises a cooling box, and a feeding groove is formed in the front side of the top of the cooling box. A feeding groove is fixedly installed between the left side and the right side of the inner wall of the feeding groove, a discharging mechanism is arranged between the upper portions of the left side and the right side of the inner wall of the cooling box, a driving box is fixedly installed below the left side of the cooling mechanism, and a driving motor is fixedly installed behind the left side of the inner wall of the driving box; a rotating rod is movably mounted in front of the left side of the inner wall of the driving box. According to the cooling device, the cooling box, the cooling liquid slope spraying box, the liquid extraction pump and the placement rollers are matched with one another, so that the polytetrafluoroethylene pipe can shake and rotate between the two placement rollers in a rolling state, rapid cooling is conducted through spraying of cooling liquid, and the cooling efficiency is improved.
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Description

Technical Field

[0001] The utility model relates to the technical field of polytetrafluoroethylene tube processing equipment, in particular to a polytetrafluoroethylene tube rapid cooling device. Background Art

[0002] Polytetrafluoroethylene (PTFE) is a high molecular weight polymer made from tetrafluoroethylene (PTFE) as a monomer. It is white, waxy, translucent, and has excellent heat and cold resistance. It can be used for long periods of time at temperatures between -180°C and 260°C. This material is resistant to acids, alkalis, and various organic solvents. However, due to the high overall temperature of PTFE tubes during processing, they need to be quickly cooled. The existing technology has the following problems:

[0003] Because the existing polytetrafluoroethylene tube cooling device usually adopts the direct blowing method of air cooling for cooling, but since the polytetrafluoroethylene tube is relatively long, the heat dissipation area of the air cooling method cannot be concentrated for cooling, resulting in low cooling efficiency of the air cooling, affecting the production efficiency of the polytetrafluoroethylene tube. Utility Model Content

[0004] The utility model provides a polytetrafluoroethylene tube rapid cooling device to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A rapid cooling device for polytetrafluoroethylene tubes includes a cooling mechanism, a discharging and air-drying mechanism is provided on the right side of the cooling mechanism, the cooling mechanism includes a cooling box, a feed trough is provided on the top front side of the cooling box, a feed inclined plate is fixedly installed between the left and right sides of the inner wall of the feed trough, a discharging mechanism is provided between the upper left and right sides of the inner wall of the cooling box, and a drive box is fixedly installed on the lower left side of the cooling mechanism.

[0007] A driving motor is fixedly installed at the rear left side of the inner wall of the driving box, and a rotating rod is movably installed at the front left side of the inner wall of the driving box. The right end of the rotating rod and the right end of the output shaft of the driving motor both penetrate into the inner cavity of the cooling box and are fixedly installed with a placement roller. The output shaft of the driving motor is located in the inner cavity of the driving box and a rotating rod is fixedly installed on the outer wall of the rotating rod. The outer wall of the rotating rod is located in the inner cavity of the driving box and a gear 2 is fixedly installed. The gear 2 is meshed with the gear 1. The right ends of the two placement rollers are movably connected to the right side of the inner wall of the cooling box. A discharge hole that penetrates into the inner cavity is opened on the right side of the cooling box, and the discharge hole is located above the right side of the two placement rollers.

[0008] A further improvement of the technical solution of the present utility model is that: a coolant inclined spray box running through its inner cavity is fixedly installed on the rear side of the cooling box, and the coolant inclined spray box is located in the inner cavity of the cooling box and is evenly fixedly connected with a nozzle; a liquid pump is fixedly installed on the rear side of the cooling box, the output end of the liquid pump is fixedly connected to the rear side of the coolant inclined spray box, the input end of the liquid pump is fixedly connected to the inner cavity of the cooling box, a liquid adding pipe is fixedly connected to the right side of the rear end of the cooling box, and a visualization window is provided at the rightmost side of the rear end of the cooling box.

[0009] A further improvement of the technical solution of the present utility model is that: a heat conduction plate mounting groove is opened at the bottom center of the cooling box and passes through its inner cavity, a heat conduction plate is fixedly installed on the inner circle of the heat conduction plate mounting groove, and a plurality of hanging plates are evenly fixedly installed on the front and rear sides of the bottom of the cooling box, and the opposite surfaces of the hanging plates on the front and rear sides are fixedly connected with connecting rods, which are located below the heat conduction plate, and a heat conduction plate cooling fan is fixedly installed at the bottom center of the connecting rod.

[0010] A further improvement of the technical solution of the present utility model is that: the discharging mechanism includes a door-shaped connecting plate and a motor, the door-shaped connecting plate is fixedly installed between the opposite surfaces of the cooling box, the motor is fixedly installed on the upper left side of the cooling box, the output shaft of the motor passes through the horizontal part below the door-shaped connecting plate and is fixedly installed with a reciprocating screw, the outer wall of the reciprocating screw is threadedly installed with a movable plate, the front and rear sides of the movable plate are respectively overlapped with the opposite surfaces of the left and right sides of the door-shaped connecting plate at vertical positions, and a pipe pushing hanger is fixedly installed on the bottom of the movable plate, and the pipe pushing hanger is located above the gap between the opposite surfaces of the two placement rollers.

[0011] A further improvement of the technical solution of the present utility model is that the discharging and drying mechanism includes a discharge inclined plate, the discharge inclined plate is fixedly installed on the right side of the cooling box, the discharge hole is located above the left side of the discharge inclined plate, and a grid plate is fixedly installed on the front end of the discharge inclined plate, and a limit plate is fixedly installed on the front end of the grid plate.

[0012] A further improvement of the technical solution of the present utility model is that three C-shaped connecting rods are fixedly installed on the front side of the limiting plate, and an air-drying frame is fixedly installed on the rear end of the three C-shaped connecting rods. The air-drying frame is located directly above the grid plate, and a connecting long plate is fixedly installed between the left and right sides of the inner circle of the air-drying frame. Three six-blade air-drying fans are evenly fixedly installed on the bottom of the connecting long plate.

[0013] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0014] The utility model provides a rapid cooling device for polytetrafluoroethylene tubes. Through the mutual cooperation among a cooling box, a cooling liquid inclined spray box, a liquid pump, and a placement roller, the polytetrafluoroethylene tube can be swung and rotated between two placement rollers in a rolling state, and the cooling liquid is sprayed to quickly cool down the tube, thereby improving the cooling efficiency.

[0015] The utility model provides a device for rapidly cooling polytetrafluoroethylene tubes. Through the mutual cooperation between a discharging mechanism and a discharging air-drying mechanism, the polytetrafluoroethylene tubes rapidly cooled by a coolant can be automatically and rapidly discharged and subjected to secondary air-drying, thereby preventing the coolant from adhering and achieving a secondary cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cooling mechanism of the utility model structure;

[0018] Figure 3 This is a rear view schematic diagram of the cooling box of the utility model structure;

[0019] Figure 4 This is a schematic diagram of the discharging mechanism of the utility model structure;

[0020] Figure 5 This is a schematic diagram of the discharge and air-drying mechanism of the utility model structure.

[0021] In the figure: 1. Cooling mechanism; 11. Cooling box; 111. Coolant inclined spray box; 112. Liquid pump; 113. Liquid adding pipe; 114. Visualization window; 115. Heat conduction plate mounting slot; 116. Heat conduction plate; 117. Hanging plate; 118. Connecting rod; 119. Heat conduction plate cooling fan; 12. Feed chute; 13. Feed inclined plate; 14. Discharge mechanism; 141. Door-type connecting plate; 142. Motor; 14 3. Reciprocating screw; 144. Moving plate; 145. Push-tube hanger; 15. Drive box; 151. Drive motor; 152. Gear 1; 153. Turning rod; 154. Gear 2; 155. Placement roller; 16. Discharge hole; 2. Discharge air-drying mechanism; 21. Unloading inclined plate; 22. Grid plate; 23. Limiting plate; 24. C-type connecting rod; 25. Air-drying frame; 26. Connecting long plate; 27. Six-blade air-drying fan. DETAILED DESCRIPTION

[0022] To make the technical means, creative features, objectives and effects of this utility model easy to understand

[0023] Understand, the utility model is further described below in conjunction with specific implementation methods.

[0024] like Figure 1 、 Figure 2 As shown, the utility model provides a rapid cooling device for polytetrafluoroethylene tubes, including a cooling mechanism 1, a discharging and air-drying mechanism 2 is provided on the right side of the cooling mechanism 1, the cooling mechanism 1 includes a cooling box 11, a feeding trough 12 is provided on the top front side of the cooling box 11, a feeding inclined plate 13 is fixedly installed between the left and right sides of the inner wall of the feeding trough 12, a discharging mechanism 14 is provided between the upper left and right sides of the inner wall of the cooling box 11, a driving box 15 is fixedly installed on the lower left side of the cooling mechanism 1, a driving motor 151 is fixedly installed on the left rear side of the inner wall of the driving box 15, and a rotating rod 15 is movably installed on the left front side of the inner wall of the driving box 15 3. The right end of the rotating rod 153 and the right end of the output shaft of the driving motor 151 both penetrate the inner cavity of the cooling box 11 and are fixedly installed with a placement roller 155. The output shaft of the driving motor 151 is located on the outer wall of the inner cavity of the driving box 15 and the rotating rod 153 is fixedly installed. The outer wall of the rotating rod 153 is located in the inner cavity of the driving box 15 and a gear 2 154 is fixedly installed. The gear 2 154 is meshed with the gear 1 152. The right ends of the two placement rollers 155 are movably connected to the right side of the inner wall of the cooling box 11. A discharge hole 16 that penetrates the inner cavity is opened on the right side of the cooling box 11. The discharge hole 16 is located above the right side of the two placement rollers 155.

[0025] When the processed polytetrafluoroethylene tube needs to be cooled, it is only necessary to place the polytetrafluoroethylene tube horizontally on the feed inclined plate 13 so that it rolls down to the gap between the two placement rollers 155 in the inner cavity of the cooling box 11, and then start the drive motor 151 in the inner cavity of the drive box 15 to drive the gear 152 and one of the placement rollers 155 in the inner cavity of the cooling box 11 to rotate, and then cooperate with the engagement of gear 152 and gear 2 154 to drive the rotating rod 153 and the other placement roller 155 to rotate in opposite directions, so that the two placement rollers 155 rotate in the direction of the opposite surfaces, allowing the polytetrafluoroethylene tube to continuously swing and rotate in the gap between the two placement rollers 155, which is convenient for all-round cooling.

[0026] like Figure 3As shown, the rear side of the cooling box 11 is fixedly installed with a coolant inclined spray box 111 that runs through its inner cavity. The coolant inclined spray box 111 is located in the inner cavity of the cooling box 11 and is evenly fixedly connected with a nozzle. The rear side of the cooling box 11 is fixedly installed with a liquid pump 112. The output end of the liquid pump 112 is fixedly connected to the rear side of the coolant inclined spray box 111. The input end of the liquid pump 112 is fixedly connected to the inner cavity of the cooling box 11. A liquid adding pipe 113 is fixedly connected to the right side of the rear end of the cooling box 11. The cooling box 11 A visualization window 114 is provided on the far right side of the rear end of the cooling box 11. A heat conducting plate mounting groove 115 is provided at the bottom center of the cooling box 11, which passes through the inner cavity thereof. A heat conducting plate 116 is fixedly mounted on the inner circle of the heat conducting plate mounting groove 115. Several hanging plates 117 are evenly fixedly mounted on the front and rear sides of the bottom of the cooling box 11. The opposite surfaces of the hanging plates 117 on the front and rear sides are fixedly connected with connecting rods 118. The connecting rods 118 are located below the heat conducting plate 116. A heat conducting plate cooling fan 119 is fixedly mounted at the bottom center of the connecting rods 118.

[0027] The cooling liquid is injected into the inner cavity of the cooling box 11 in advance by using the liquid adding pipe 113, and the cooling liquid is prevented from hitting the placement roller 155 by observing the visual window 114. Then the liquid extraction pump 112 can be started to extract the cooling liquid from the inner cavity of the cooling box 11, and the cooling liquid inclined spray box 111 connected to its output end and a row of several nozzles located on the inclined surface of the inner cavity of the cooling box 11 are used to spray the cooling liquid on the polytetrafluoroethylene tube in a rotating and shaking state, thereby achieving rapid cooling, and the sprayed cooling liquid falls into the cooling box 11 for secondary recycling. The cooling liquid that becomes hot due to contact with the polytetrafluoroethylene tube is heat-dissipated through the metal heat-dissipating plate 116 on the inner circle of the heat-dissipating plate mounting groove 115, and then the heat-dissipating plate cooling fan 119 at the bottom of several connecting rods 118 is used to dissipate heat to prevent the cooling liquid temperature from being too high.

[0028] like Figure 4 、 Figure 5As shown, the discharging mechanism 14 includes a door-shaped connecting plate 141 and a motor 142. The door-shaped connecting plate 141 is fixedly installed between the opposite surfaces of the cooling box 11, and the motor 142 is fixedly installed on the upper left side of the cooling box 11. The output shaft of the motor 142 passes through the horizontal part below the door-shaped connecting plate 141 and is fixedly installed with a reciprocating screw 143. The outer wall of the reciprocating screw 143 is threadedly installed with a moving plate 144. The front and rear sides of the moving plate 144 are respectively overlapped with the opposite surfaces of the left and right sides of the door-shaped connecting plate 141 at right angles. A pipe pusher 145 is fixedly installed at the bottom of the moving plate 144. The pipe pusher 145 is located between the opposite surfaces of the two placement rollers 155. Above the gap, the discharging and drying mechanism 2 includes a discharge inclined plate 21, which is fixedly mounted on the right side of the cooling box 11, and the discharge hole 16 is located above the left side of the discharge inclined plate 21. A grid plate 22 is fixedly mounted on the front end of the discharge inclined plate 21, and a limit plate 23 is fixedly mounted on the front end of the grid plate 22. Three C-shaped connecting rods 24 are fixedly mounted on the front side of the limit plate 23, and a drying frame 25 is fixedly mounted on the rear end of the three C-shaped connecting rods 24. The drying frame 25 is located just above the grid plate 22, and a connecting long plate 26 is fixedly mounted between the left and right sides of the inner circle of the drying frame 25. Three six-leaf drying fans 27 are evenly fixedly mounted on the bottom of the connecting long plate 26.

[0029] After recording the time required for the polytetrafluoroethylene tube to cool down in advance, the motor 142 can be started after a certain period of continuous cooling to drive the reciprocating screw 143 to rotate, thereby cooperating with the threaded connection between the movable plate 144 and the reciprocating screw 143 to drive the tube-pushing boom 145 to push the polytetrafluoroethylene tube to the right side until it passes through the discharge hole 16 for discharge, and then the movable plate 144 will reset again under the left and right of the reciprocating screw 143, and the polytetrafluoroethylene tube will fall onto the discharge inclined plate 21 after passing through the discharge hole 16, and then It is allowed to roll naturally, and the limiting plate 23 on the front side of the grid plate 22 is used to limit the position so that the polytetrafluoroethylene tube is concentrated above the grid plate 22. Then the three six-blade air-drying fans 27 connected to the inner ring of the air-drying frame 25 below the long plate 26 are started, so that the coolant remaining on the outer wall of the polytetrafluoroethylene tube is dried by strong wind. The small amount of remaining coolant will also be discharged through the gap between the grid plates 22 to prevent accumulation. At the same time, the temperature of the polytetrafluoroethylene tube can be further reduced during air drying. Finally, the polytetrafluoroethylene tube can be directly taken out.

[0030] The working principle of the polytetrafluoroethylene tube rapid cooling device is described in detail below.

[0031] like Figure 1-5As shown, when the processed polytetrafluoroethylene tube needs to be cooled, it is only necessary to place the polytetrafluoroethylene tube horizontally on the feed inclined plate 13 so that it rolls down to the gap between the two placement rollers 155 in the inner cavity of the cooling box 11, and then start the driving motor 151 in the inner cavity of the driving box 15 to drive the gear 152 and one of the placement rollers 155 in the inner cavity of the cooling box 11 to rotate, and then cooperate with the engagement of the gear 152 and the gear 2 154 to drive the rotating rod 153 and the other placement roller 155 to rotate in the opposite direction, so that the two placement rollers 155 move in the direction of the opposite surface. Rotate, let the polytetrafluoroethylene tube shake and rotate continuously in the gap between the two placement rollers 155, and at the same time use the liquid adding pipe 113 to inject coolant into the inner cavity of the cooling box 11 in advance, and prevent the coolant from hitting the placement roller 155 by observing the visual window 114, then start the liquid extraction pump 112 to extract the coolant from the inner cavity of the cooling box 11, and use the coolant inclined spray box 111 connected to its output end and a row of several nozzles of the coolant inclined spray box 111 located on the inclined surface of the inner cavity of the cooling box 11 to spray the coolant on the polytetrafluoroethylene tube in the rotating and shaking state, so as to Rapid cooling is achieved, and the sprayed coolant falls into the cooling box 11 for secondary recycling. The coolant that becomes hot due to contact with the polytetrafluoroethylene tube conducts heat through the heat conducting plate 116 on the inner circle of the heat conducting plate mounting groove 115, and then uses the heat conducting plate cooling fan 119 at the bottom of the connecting rod 118 to dissipate heat to prevent the coolant temperature from being too high. After continuous cooling for a certain period of time, the motor 142 can be started to drive the reciprocating screw 143 to rotate, thereby cooperating with the threaded connection between the movable plate 144 and the reciprocating screw 143 to drive the tube pusher 145 to push the right side of the polytetrafluoroethylene tube until it penetrates. The material is discharged through the discharge hole 16, and then the movable plate 144 will be reset again on the left and right bottom of the reciprocating screw 143. After passing through the discharge hole 16, the polytetrafluoroethylene tube will fall on the discharge inclined plate 21, and then roll down naturally. The limiting plate 23 on the front side of the grid plate 22 is used to limit the position so that the polytetrafluoroethylene tube is concentrated above the grid plate 22, and then the three six-leaf air-drying fans 27 connected to the inner ring of the air-drying frame 25 under the long plate 26 are started, so that the coolant remaining on the outer wall of the polytetrafluoroethylene tube can be dried by strong wind, and the temperature of the polytetrafluoroethylene tube can be further reduced. Finally, the polytetrafluoroethylene tube can be directly taken out.

[0032] While the present invention has been generally described above, it is readily apparent to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A polytetrafluoroethylene tube rapid cooling device, comprising a cooling mechanism (1), characterized in that: A discharge air-drying mechanism (2) is provided on the right side of the cooling mechanism (1), and the cooling mechanism (1) includes a cooling box (11), a feed trough (12) is provided on the top front side of the cooling box (11), a feed inclined plate (13) is fixedly installed between the left and right sides of the inner wall of the feed trough (12), a discharge mechanism (14) is provided between the upper left and right sides of the inner wall of the cooling box (11), and a drive box (15) is fixedly installed at the lower left side of the cooling mechanism (1); A driving motor (151) is fixedly installed at the rear left side of the inner wall of the driving box (15), and a rotating rod (153) is movably installed at the front left side of the inner wall of the driving box (15). The right end of the rotating rod (153) and the right end of the output shaft of the driving motor (151) are both passed through the inner cavity of the cooling box (11) and fixedly installed with a placement roller (155). The output shaft of the driving motor (151) is located on the outer wall of the inner cavity of the driving box (15) and the rotating rod (153) is fixedly installed. The outer wall of the rotating rod (153) is located in the inner cavity of the driving box (15) and the part thereof is fixedly installed with a gear 2 (154). The gear 2 (154) is meshed with the gear 1 (152). The right ends of the two placement rollers (155) are both movably connected to the right side of the inner wall of the cooling box (11). A discharge hole (16) passing through the inner cavity is opened on the right side of the cooling box (11). The discharge hole (16) is located above the right side of the two placement rollers (155).

2. The polytetrafluoroethylene tube rapid cooling device according to claim 1, characterized in that: A coolant bevel spray box (111) is fixedly installed on the rear side of the cooling box (11) and runs through its inner cavity. The coolant bevel spray box (111) is located on the bevel of the inner cavity of the cooling box (11) and is evenly fixedly connected to a nozzle. A liquid extraction pump (112) is fixedly installed on the rear side of the cooling box (11). The output end of the liquid extraction pump (112) is fixedly connected to the rear side of the coolant bevel spray box (111). The input end of the liquid extraction pump (112) is fixedly connected to the inner cavity of the cooling box (11). A liquid adding pipe (113) is fixedly connected to the right side of the rear end of the cooling box (11). A visualization window (114) is provided on the rightmost side of the rear end of the cooling box (11).

3. The polytetrafluoroethylene tube rapid cooling device according to claim 2, characterized in that: A heat conducting plate mounting groove (115) is provided at the center of the bottom of the cooling box (11) and passes through the inner cavity thereof. A heat conducting plate (116) is fixedly mounted on the inner ring of the heat conducting plate mounting groove (115). A plurality of hanging plates (117) are evenly fixedly mounted on the front and rear sides of the bottom of the cooling box (11). The opposite surfaces of the hanging plates (117) on the front and rear sides are fixedly connected with connecting rods (118). The connecting rods (118) are located below the heat conducting plate (116). A heat conducting plate cooling fan (119) is fixedly mounted at the center of the bottom of the connecting rods (118).

4. The polytetrafluoroethylene tube rapid cooling device according to claim 1, characterized in that: The discharging mechanism (14) includes a door-shaped connecting plate (141) and a motor (142). The door-shaped connecting plate (141) is fixedly installed between opposite surfaces of the cooling box (11). The motor (142) is fixedly installed above the left side of the cooling box (11). The output shaft of the motor (142) passes through the horizontal part below the door-shaped connecting plate (141) and is fixedly installed with a reciprocating screw (143). The outer wall of the reciprocating screw (143) is threadedly installed with a movable plate (144). The front and rear sides of the movable plate (144) are respectively overlapped with the opposite surfaces of the left and right sides of the door-shaped connecting plate (141) at vertical positions. A pipe pusher (145) is fixedly installed at the bottom of the movable plate (144). The pipe pusher (145) is located above the gap between the opposite surfaces of the two placement rollers (155).

5. The polytetrafluoroethylene tube rapid cooling device according to claim 1, characterized in that: The discharge air-drying mechanism (2) comprises a discharge inclined plate (21), the discharge inclined plate (21) is fixedly mounted on the right side of the cooling box (11), the discharge hole (16) is located above the left side of the discharge inclined plate (21), a grid plate (22) is fixedly mounted on the front end of the discharge inclined plate (21), and a limit plate (23) is fixedly mounted on the front end of the grid plate (22).

6. The polytetrafluoroethylene tube rapid cooling device according to claim 5, characterized in that: Three C-shaped connecting rods (24) are fixedly installed on the front side of the limiting plate (23), and an air-drying frame (25) is fixedly installed on the rear end of the three C-shaped connecting rods (24). The air-drying frame (25) is located directly above the grid plate (22), and a connecting long plate (26) is fixedly installed between the left and right sides of the inner circle of the air-drying frame (25). Three six-leaf air-drying fans (27) are evenly fixedly installed on the bottom of the connecting long plate (26).