Heating device of screw extruder
By designing a thermal oil reflux circulation heating and heat exchange system in the screw extruder, the waste heat in the high-temperature zone is used for heating in the low-temperature zone, which solves the problem of low thermal energy utilization in the existing technology and achieves more efficient thermal energy utilization and Lower production costs and energy consumption.
Patent Information
- Application Number
- CN202420781384.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-16
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-04-16
AI Technical Summary
The heat energy utilization rate of existing screw extruder heating devices is low, resulting in higher production costs and energy consumption.
Design a screw extruder heating device that utilizes the characteristics of the temperature gradually decreasing during the reflux circulation heating and heat exchange process of thermal oil to use the waste heat in the high-temperature area for heating in the low-temperature area and evenly heat through the serpentine channel.
It effectively improves the utilization rate of heat energy, reduces production costs and energy consumption, and extends the use time of thermal oil through the filter, reducing the frequency of oil changes.
Smart Images
Figure CN222387580U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screw extruders, in particular to a heating device for a screw extruder. Background Art
[0002] The extruder is used to make plastic pipes. After the material enters the screw extruder, it is plasticized by heating and rolling. The heating of the extruder has multiple temperature zones, which gradually decrease from the starting temperature of 190℃ to 220℃ to each temperature zone. The raw materials in the extruder are kept in a molten state by heating, and are continuously extruded by the screw head at a constant pressure, quantity, and temperature under pressure. In this process, improving the thermal energy utilization rate of the heating device can reduce production costs and energy consumption. The temperature of the thermal oil heating method is consistent with the hot melting temperature of the plastic raw materials. The temperature gradually decreases during the heat exchange process. The residual heat in the high temperature zone can heat the low temperature zone. After the heat exchange is completed, there is still residual temperature, which is heated by the hot oil reflux cycle. Through this setting, the thermal energy utilization rate can be effectively improved. For this reason, we provide a screw extruder heating device. Utility Model Content
[0003] The utility model aims to provide a screw extruder heating device, which utilizes hot oil reflux circulation heating and gradually reduces the temperature during heat exchange to utilize the waste heat in the high temperature zone to heat the low temperature zone, thereby effectively improving the utilization rate of thermal energy.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a screw extruder heating device, comprising a heating sleeve assembly sleeved on the extruder, wherein the input end of the heating sleeve assembly is connected to the output end of a heat transfer oil circulation heating system through an oil inlet pipe, and the output end of the heating sleeve assembly is connected to the input end of the heat transfer oil circulation heating system through an oil outlet pipe, and the heat transfer oil circulation heating system pumps heating oil to the heating sleeve assembly for circulation;
[0005] The heating sleeve assembly includes a heating sleeve 1 in the heating zone, a heating sleeve 2 in the constant temperature zone and a heating sleeve 3 in the insulation zone, which are arranged along the extrusion direction of the extruder. Serpentine channels are arranged on the heating sleeve 1, the heating sleeve 2 and the heating sleeve 3 around the circumference of the extruder, and the serpentine channels of the heating sleeve 1, the heating sleeve 2 and the heating sleeve 3 are connected end to end in sequence. The oil inlet pipe is connected to the head end of the serpentine channel of the heating sleeve 1, and the oil outlet pipe is connected to the tail end of the serpentine channel of the heating sleeve 3.
[0006] Preferably, the serpentine channel includes straight channels extending through the heating jacket 1, the heating jacket 2 and the heating jacket 3 in parallel along the axial direction and curved pipes connected to both ends of two adjacent straight channels, and the curved pipes are connected to the straight channels in an S-shaped direction.
[0007] Preferably, the bent pipe is a copper pipe.
[0008] Preferably, the serpentine channels of the heating jacket 1, the heating jacket 2 and the heating jacket 3 are connected end to end in sequence through straight pipes.
[0009] Preferably, a temperature meter is provided on the oil outlet pipe.
[0010] Preferably, a filter is provided on the oil outlet pipe.
[0011] The utility model provides a screw extruder heating device, which has the following beneficial effects:
[0012] The utility model arranges temperature zones of the heating sleeve assembly, and as the temperature gradually decreases during the heat exchange process, the heat transfer oil is gradually diverted from the high temperature zone to the low temperature zone, and the waste heat in the high temperature zone is used to heat and keep the materials in the low temperature zone warm. The heat transfer oil is evenly heated under the distribution of the serpentine channel, and the hot oil is refluxed and circulated for heating by the heat transfer oil circulation heating system, which effectively improves the utilization rate of thermal energy. After reflux, the heat transfer oil is circulated and filtered through the filter, which can increase the use time of the heat transfer oil and reduce the frequency of heat transfer oil changes. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 This is a schematic diagram of the structure of the heating sleeve assembly of the utility model;
[0015] Figure 3 This is an expanded view of the heating sleeve assembly of the utility model.
[0016] In the figure: 1. extruder; 2. heating sleeve assembly; 21. heating sleeve one; 22. heating sleeve two; 23. heating sleeve three; 24. serpentine channel; 241. straight channel; 242. elbow; 25. straight pipe; 3. oil inlet pipe; 4. thermal oil circulation heating system; 5. oil outlet pipe; 6. temperature meter; 7. filter. DETAILED DESCRIPTION
[0017] 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.
[0018] like Figure 1-3As shown, the utility model provides a technical solution: a screw extruder heating device, comprising a heating sleeve assembly 2 sleeved on an extruder 1, the input end of the heating sleeve assembly 2 is connected to the output end of a heat transfer oil circulation heating system 4 through an oil inlet pipe 3, the output end of the heating sleeve assembly 2 is connected to the input end of the heat transfer oil circulation heating system 4 through an oil outlet pipe 5, a temperature meter 6 and a filter 7 are arranged on the oil outlet pipe 5, and the heat transfer oil circulation heating system 4 pumps heating oil to the heating sleeve assembly 2 for circulation;
[0019] The heating sleeve assembly 2 includes a heating sleeve 1 21 in the heating zone, a heating sleeve 2 22 in the constant temperature zone, and a heating sleeve 3 23 in the heat preservation zone, which are arranged along the extrusion direction of the extruder 1. The heating sleeve 1 21, the heating sleeve 22, and the heating sleeve 3 23 are all provided with a serpentine channel 24 around the circumference of the extruder 1, and the serpentine channels 24 of the heating sleeve 1 21, the heating sleeve 22, and the heating sleeve 3 23 are connected end to end in sequence ... The pipes 25 are connected end to end in sequence, the oil inlet pipe 3 is connected to the head end of the serpentine channel 24 of the heating jacket 1 21, and the oil outlet pipe 5 is connected to the tail end of the serpentine channel 24 of the heating jacket 3 23. The serpentine channel 24 includes straight channels 241 arranged along parallel axes through the heating jacket 1 21, the heating jacket 22 and the heating jacket 3 23, and bent pipes 242 connected to the two ends of the adjacent straight channels 241. The bent pipe 242 is connected to the straight channel 241 in an S-shaped direction, and the bent pipe 242 is a copper pipe;
[0020] When in use, the hot oil is circulated in the heating sleeve assembly 2 through the heat transfer oil circulation heating system 4, and the refluxed hot oil is circulated and heated. The heating sleeve assembly 2 is set with temperature zones. As the temperature gradually decreases during the heat exchange process, the heat transfer oil is gradually diverted from the high temperature zone to the low temperature zone, and the waste heat in the high temperature zone is used to heat and keep the material in the low temperature zone warm. The heat transfer oil is evenly heated under the distribution of the serpentine channel 24. After reflux, the heat transfer oil is circulated and filtered through the filter 7, which can increase the use time of the heat transfer oil and reduce the frequency of oil change.
[0021] It should be noted that, in this article, relational terms such as first and second, etc. 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.
[0022] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A screw extruder heating device, characterized in that: It comprises a heating sleeve assembly (2) sleeved on an extruder (1), the input end of the heating sleeve assembly (2) being connected to the output end of a heat transfer oil circulation heating system (4) via an oil inlet pipe (3), the output end of the heating sleeve assembly (2) being connected to the input end of the heat transfer oil circulation heating system (4) via an oil outlet pipe (5), and the heat transfer oil circulation heating system (4) pumping heating oil into the heating sleeve assembly (2) for circulation; The heating sleeve assembly (2) comprises a heating sleeve 1 (21) in a heating zone, a heating sleeve 2 (22) in a constant temperature zone and a heating sleeve 3 (23) in a heat preservation zone, which are arranged along the extrusion direction of the extruder (1); a serpentine channel (24) is arranged on each of the heating sleeve 1 (21), the heating sleeve 2 (22) and the heating sleeve 3 (23) around the circumference of the extruder (1); and the serpentine channels (24) of the heating sleeve 1 (21), the heating sleeve 2 (22) and the heating sleeve 3 (23) are connected end to end in sequence; the oil inlet pipe (3) is connected to the head end of the serpentine channel (24) of the heating sleeve 1 (21), and the oil outlet pipe (5) is connected to the tail end of the serpentine channel (24) of the heating sleeve 3 (23).
2. A screw extruder heating device according to claim 1, characterized in that: The serpentine channel (24) comprises a straight channel (241) extending through the heating sleeve 1 (21), the heating sleeve 2 (22) and the heating sleeve 3 (23) along a parallel axis and a curved pipe (242) connected to both ends of two adjacent straight channels (241), wherein the curved pipe (242) is connected to the straight channel (241) in an S-shaped direction.
3. A screw extruder heating device according to claim 2, characterized in that: The bent pipe (242) is a copper pipe.
4. A screw extruder heating device according to claim 1, characterized in that: The serpentine channels (24) of the heating jacket 1 (21), the heating jacket 2 (22) and the heating jacket 3 (23) are connected end to end in sequence via a straight tube (25).
5. A screw extruder heating device according to claim 1, characterized in that: A temperature meter (6) is provided on the oil outlet pipe (5).
6. A screw extruder heating device according to claim 1, characterized in that: A filter (7) is provided on the oil outlet pipe (5).