Efficient cooling device of sheet extruder
By designing the snake-shaped cooling tube and inner roller body in the cooling device of the sheet extruder, the temperature imbalance caused by insufficient flow rate and quantity of coolant in the prior art is solved, and an efficient and uniform cooling effect is achieved.
Patent Information
- Application Number
- CN202421470776.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-25
- Publication Date
- 2025-05-20
- Estimated Expiration
- 2034-06-25
AI Technical Summary
The existing sheet extruder cooling device cannot uniformly cool the pressure rollers when the cooling liquid flow rate and quantity are insufficient, resulting in local temperature imbalance and cooling effect reduction.
An efficient cooling device including an outer roller body and an inner roller body is designed. A snake-shaped cooling tube is arranged on the inner wall of the outer roller body. The coolant flows through the serpentine cooling tube in one direction. The inner roller body increases the number of flow channels and increases the fluid flow rate and exchange rate.
The 360° uniform heat exchange of the coolant is achieved, the temperature balance of the outer roller body is ensured, and efficient cooling is achieved by only a small amount of coolant is required, which improves cooling efficiency and energy-saving effect.
Smart Images
Figure CN222886213U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cooling of sheet extruders, and particularly relates to an efficient cooling device for a sheet extruder. Background Technique
[0002] In the process of manufacturing medical auxiliary sheets, plastic particles need to be pre-treated, and then heated and melted and extruded according to a corresponding die head to form sheets of corresponding sizes. During the sheet extrusion process, a colloidal substance is presented, and the colloidal substance needs to be cooled and formed during the extrusion process by a pressure roller.
[0003] Normally, circulating water is set inside the pressure roller. In this cooling roller, the cooling fluid enters from one end and flows out from the other end. Since the drum of the cooling roller is large and the cooling roller is always in a rotating state, in order to achieve good cooling effect, more cooling fluid and faster flow rate are required inside the roller. If there is less cooling fluid inside the roller, when the roller rotates, the cooling fluid is always at the bottom of the roller and cannot cool the upper pressure roller. Therefore, it is very difficult to ensure that all fluids can evenly cool the roller wall during the fluid circulation process, which may cause local fluid temperature imbalance and reduce the cooling effect. Content of the Utility Model
[0004] (1) Technical Problems to be Solved
[0005] In view of the deficiencies of the prior art, the utility model provides an efficient cooling device for a sheet extruder, which solves the problems put forward in the above background technique.
[0006] (2) Technical Solutions
[0007] To achieve the above object, the utility model is realized through the following technical solutions: An efficient cooling device for a sheet extruder includes an outer roller body. Water inlet shaft sections and water outlet shaft sections are arranged at both ends of the outer roller body. A serpentine cooling pipe is arranged on the inner annular wall of the outer roller body. The serpentine cooling pipe is arranged in a loop along the axial length of the outer roller body. Cooling inlet pipes and cooling outlet pipes connected to the inlet and outlet of the serpentine cooling pipe are arranged at the water inlet shaft sections and water outlet shaft sections.
[0008] Preferably, an inner roller body is coaxially arranged inside the outer roller body. An axial through channel is provided at the center of the inner roller body. One end of the inner roller body is fixed to the water inlet shaft section, and the water inlet shaft section is communicated with the axial through channel. The space between the inner roller body and the outer roller body is a swirling channel. A plurality of water inlet holes are opened on one end surface of the inner roller body close to the water inlet shaft section. A drain pipe is arranged along the axial direction inside the inner roller body. Both ends of the drain pipe are respectively connected to the water inlet holes and the water outlet shaft section.
[0009] Preferably, the plurality of water inlet holes are distributed at equal angles around the center of the axial through channel.
[0010] (III) Beneficial effects
[0011] The utility model provides a high-efficiency cooling device for a sheet extruder. It has the following beneficial effects:
[0012] 1. The sheet extruder has an efficient cooling device. The coolant fluid flows in one direction from the inside of the serpentine cooling tube. The coolant fluid in this flow channel can be completely replaced within a certain period of time depending on the flow rate of the fluid. There is no phenomenon that the local liquid cannot be replaced.
[0013] 2. The sheet extruder has an efficient cooling device. Since the serpentine cooling pipes are densely attached to the inner wall of the outer roller, no matter how the outer roller rotates, the coolant can evenly exchange heat with the outer roller, making the temperature of the outer roller 360 degrees balanced. At the same time, only a small amount of coolant is needed to cool the outer roller, and the utilization efficiency of the coolant is high, which is relatively energy-saving.
[0014] 3. The efficient cooling device of the sheet extruder increases the number of flow channels between the outer roller and the inner roller by adding an inner roller inside the outer roller, dividing the space of the single-pass cooling roller into multiple local spaces, increasing the flow rate and stroke of the fluid inside, speeding up the exchange of the fluid, and achieving a better cooling effect. Brief Description of the Figures
[0015] Figure 1 It is a half-section axonometric drawing of the utility model;
[0016] Figure 2 is the external axonometric drawing of the utility model;
[0017] Figure 3 An anatomical diagram of one end of the outer roller body of the utility model close to the water inlet shaft section;
[0018] Figure 4 An anatomical diagram of one end of the outer roller body of the utility model close to the water outlet shaft section;
[0019] Figure 5 This is a schematic diagram of the water flow direction between the inner roller and the outer roller of the utility model.
[0020] In the figure: 1 outer roller body, 2 water inlet, 3 water outlet, 4 serpentine cooling pipe, 5 cooling inlet pipe, 6 cooling outlet pipe, 7 inner roller body, 8 axial channel, 9 convolution channel, 10 water inlet hole, 11 drainage pipe. Specific implementation method
[0021] The utility model embodiment provides a high-efficiency cooling device for a sheet extruder, such as Figures 1-5As shown, it includes an outer roller body 1. Water inlet shaft sections 2 and water outlet shaft sections 3 are arranged at both ends of the outer roller body 1. The water inlet shaft sections 2 and the water outlet shaft sections 3 are rotatably connected through bearing seats. The water inlet and outlet channels at the centers of the water inlet shaft sections 2 and the water outlet shaft sections 3 are arranged and installed through the central holes of the bearing seats via water pipes.
[0022] As Figure 1 shown, a serpentine cooling pipe 4 is arranged on the inner wall of the outer roller body 1. The serpentine cooling pipe 4 is arranged in a circle along the inner wall of the outer roller body 1 for 360°. The serpentine cooling pipe 4 is arranged in a back-and-forth "s" shape along the axial length of the outer roller body 1. Cooling inlet pipes 5 and cooling outlet pipes 6 connected to the inlets and outlets of the serpentine cooling pipe 4 are arranged at the water inlet shaft sections 2 and the water outlet shaft sections 3. The inlet end of the cooling inlet pipe 5 is connected to the water pipe of the water inlet channel, and the cooling outlet pipe 6 is connected to the water pipe of the water outlet channel.
[0023] The coolant fluid flows unidirectionally inside the serpentine cooling pipe 4. The coolant fluid in this flow channel can be completely replaced within a certain time according to the flow rate of the fluid, and there is no phenomenon that local liquid cannot be replaced.
[0024] Since the serpentine cooling pipe 4 is densely attached to the inner wall of the outer roller body 1, no matter how the outer roller body 1 rotates, the coolant can uniformly exchange heat with the outer roller body 1, making the temperature of the outer roller body 1 balanced at 360°. At the same time, only a small amount of coolant is required to cool down the outer roller body 1, and the utilization efficiency of the coolant is high, which is relatively energy-saving.
[0025] An inner roller body 7 is coaxially arranged inside the outer roller body 1. An axial through hole, the axial center channel 8, is provided at the center of the inner roller body 7. One end of the inner roller body 7 is fixed to the water inlet shaft section 2, and the water inlet shaft section 2 is communicated with the axial center channel 8. The space between the inner roller body 7 and the outer roller body 1 is the swirling channel 9. The space between the port of the inner roller body 7 and the water outlet shaft section 3 is the return channel connecting the axial center channel 8 and the swirling channel 9. The overall cross-sectional area of the swirling channel 9 is smaller than the cross-sectional area of the axial center channel 8. A plurality of water inlet holes 10 are opened on one end face of the inner roller body 7 close to the water inlet shaft section 2. The plurality of water inlet holes 10 are equally angularly distributed around the center of the axial center channel 8. A drain pipe 11 is arranged along the axial direction inside the inner roller body 7. Both ends of the drain pipe 11 are respectively connected to the water inlet holes 10 and the water outlet shaft section 3.
[0026] As Figure 5 shown, the second part of the coolant fluid flows into the axial center channel 8 from the Figure 5 water inlet shaft section 2 in the middle, then flows backward into the swirling channel 9 through the front-end return channel of the inner roller body 7. Since the space of the swirling channel 9 is small and the flow rate of the axial center channel 8 is large, the flow velocity and pressure in the swirling channel 9 will be greatly increased, and the liquid will enter the drain pipe 11 through the plurality of water inlet holes 10 and finally be discharged. Compared with a single-pass cooling roller, adding the inner roller body 7 speeds up the circulation of the fluid.
[0027] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.
Claims
1. An efficient cooling device for a sheet extruder, characterized in that: The invention comprises an outer roller body (1), wherein two ends of the outer roller body (1) are provided with a water inlet shaft section (2) and a water outlet shaft section (3), a serpentine cooling pipe (4) is arranged on the inner ring wall of the outer roller body (1), and the serpentine cooling pipe (4) is arranged to circulate back and forth along the axial length of the outer roller body (1), and a cooling inlet pipe (5) and a cooling outlet pipe (6) connected to the inlet and outlet of the serpentine cooling pipe (4) are arranged at the water inlet shaft section (2) and the water outlet shaft section (3).
2. The efficient cooling device for a sheet extruder according to claim 1, characterized in that: An inner roller body (7) is coaxially arranged inside the outer roller body (1); an axial channel (8) is axially penetrated at the center of the inner roller body (7); one end of the inner roller body (7) is fixed to the water inlet shaft section (2), and the water inlet shaft section (2) and the axial channel (8) are penetrated; the space between the inner roller body (7) and the outer roller body (1) is a swirling channel (9); a plurality of water inlet holes (10) are provided on one end surface of the inner roller body (7) close to the water inlet shaft section (2); a drainage pipe (11) is provided inside the inner roller body (7) along its axial direction; and the two ends of the drainage pipe (11) are respectively connected to the water inlet hole (10) and the water outlet shaft section (3).
3. The efficient cooling device for a sheet extruder according to claim 2, characterized in that: The plurality of water inlet holes (10) are distributed at equal angles around the center of the axial channel (8).