CN220146472U - Temperature adjusting device for MDO preheating roller - Google Patents
Temperature adjusting device for MDO preheating roller Download PDFInfo
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- CN220146472U CN220146472U CN202321610077.1U CN202321610077U CN220146472U CN 220146472 U CN220146472 U CN 220146472U CN 202321610077 U CN202321610077 U CN 202321610077U CN 220146472 U CN220146472 U CN 220146472U
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- 239000000498 cooling water Substances 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000010079 rubber tapping Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The utility model discloses a temperature adjusting device for an MDO preheating roller, which comprises a heat conducting oil heater, a heat conducting oil outflow pipe, a hot oil pump, a first communication pipe, a roller heat exchange mechanism and a heat conducting oil return pipe which are communicated in sequence and form a first circulation channel, and also comprises a refrigerator, a cooling water outflow pipe, a cooling pump, an oil cooler and a cooling water return pipe which are communicated in sequence and form a second circulation channel; the oil cooler is connected to the first communication pipe in a tapping way through an oil inlet pipe and an oil outlet pipe; the inlet end of the hot oil pump is also communicated with the outlet end of the roller heat exchange mechanism to form a third circulation channel among the roller heat exchange mechanism, the hot oil pump and the oil cooler; the system also comprises an upper computer which is respectively and electrically connected with the heat conduction oil heater, the hot oil pump, the refrigerator and the cooling pump. The device can flexibly control the temperature of the preheating roller, thereby effectively ensuring the quality of the film.
Description
Technical Field
The utility model belongs to the technical field of film production, and particularly relates to a temperature adjusting device for an MDO preheating roller.
Background
MDO is an English abbreviation for machine direction stretching of films, i.e., machine direction stretching. In general, the MDO process is to stretch a blown film or a film produced in a cast film line at a certain temperature and stretch ratio, then heat treat it, and then cool it to room temperature again. This process can be carried out either on-line during extrusion or off-line. Stretching the film in the machine direction can greatly improve the barrier properties, stiffness, flatness, tensile strength and open cell properties of the film. In addition, the MDO film has higher flatness, higher running speed and higher yield in the subsequent processing.
The MOD film is heated to a suitable temperature by passing it through a preheat roll prior to stretching. The design of the preheating process of the preheating roller by the MDO production enterprises is shown in figure 1, after the heat conduction oil is prepared by the heat conduction oil heater, the heat conduction oil is conveyed to a roller heat exchange mechanism (a spiral runner is arranged on the inner wall of the roller for heat exchange) of the production line through a heat oil pump, and after the heat conduction oil exchanges heat with the roller in the roller heat exchange mechanism (namely, the roller absorbs heat for heating and the heat conduction oil releases heat for cooling), the heat conduction oil flows back to the heat conduction oil heater for reheating, and is circulated until the temperature of the roller reaches the temperature required by preheating. But this device has the following drawbacks: (1) The phenomenon of overtemperature is easy to generate in the preheating process, and the temperature is difficult to be reduced after overtemperature, so that the quality of a film finished product is easy to be influenced; (2) Different products, such as blown films and cast films, vary widely in their properties and product ranges, and therefore the temperature required for the preheat roll. The conventional apparatus is easy to raise the temperature of the preheating roller, but has difficulty in lowering the temperature of the preheating roller. Therefore, the design can not realize flexible switching of preheating of different film products, and the waiting time during production is prolonged. Based on the defect, there is also a method of directly sending chilled water to a roller heat exchange mechanism after preparing the chilled water by a refrigerator and reducing the temperature of the roller by a heat exchange mode. On the one hand, the service life of the roller can be influenced by larger temperature difference transformation, on the other hand, difficulty exists in adjusting the working temperature required by the roller due to larger temperature difference, repeated tests are needed, and the waiting time in production is prolonged. Accordingly, in order to solve the above-mentioned problems, the present utility model has been made in view of the prior art to provide a temperature adjusting device for an MDO preheating roller.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a temperature adjusting device for an MDO preheating roller.
The utility model is implemented by the following technical scheme:
the temperature adjusting device for the MDO preheating roller comprises a heat conducting oil heater 1, a heat conducting oil outflow pipe 2, a heat oil pump 3, a first communication pipe 4, a roller heat exchange mechanism 5 and a heat conducting oil return pipe 6 which are communicated in sequence and form a first circulation channel, and further comprises a refrigerator 7, a cooling water outflow pipe 8, a cooling pump 9, an oil cooler 10 and a cooling water return pipe 11 which are communicated in sequence and form a second circulation channel; the oil cooler 10 is connected to the first communication pipe 4 in a tapping way through an oil inlet pipe 12 and an oil outlet pipe 13; the inlet end of the hot oil pump 3 is also communicated with the outlet end of the roller heat exchange mechanism 5 to form a second communicating pipe 14, so that a third circulating channel is formed among the roller heat exchange mechanism 5, the hot oil pump 3 and the oil cooler 10; the device also comprises an upper computer which is respectively and electrically connected with the heat conduction oil heater 1, the hot oil pump 3, the refrigerator 7 and the cooling pump 9. The oil cooler 10 of the present utility model may use a stainless steel tube-in-tube type oil cooler. The oil inlet pipe 12 and the oil outlet pipe 13 are both stainless steel hoses. The cooling water outflow pipe 8 and the cooling water return pipe 11 are connected by adopting a hard pipe and a hose. The upper computer can control the on and off of the heat conduction oil heater 1, the hot oil pump 3, the refrigerator 7 and the cooling pump 9.
Optionally, a filter 15 is disposed on the second communicating tube 14. The shell and tube oil cooler is suitable for cooling low-viscosity and cleaner oil. The filter 15 is added to filter the hot oil flowing through the tube-in-tube oil cooler.
Optionally, a temperature sensor is arranged in the roller heat exchange mechanism 5, and the temperature sensor is in communication connection with the upper computer. The temperature sensor is used for monitoring the temperature of the roller in real time and feeding back temperature information to the upper computer.
Optionally, the heat conduction oil outflow pipe 2 is provided with a first oil valve 16; the oil inlet pipe 12 and the oil outlet pipe 13 are respectively provided with a second oil valve 17; the heat conducting oil return pipe 6 is provided with a third oil valve 18; a fourth oil valve 20 is arranged at the pipeline of the first communication pipe 4 between the oil inlet pipe 12 and the oil outlet pipe 13; the second communicating pipe 14 is provided with a communicating valve 19. The first oil valve 16, the second oil valve 17, the third oil valve 18, the fourth oil valve 20 and the communication valve 19 can be connected with an upper computer and controlled by the upper computer.
Optionally, the cooling water outflow pipe 8 and the cooling water return pipe 11 are respectively provided with a cooling water valve 21; and the cooling water return pipe 11 is also provided with a pressure gauge and a thermometer. The pressure gauge and the temperature gauge may be used to detect the pressure and the temperature of the water in the cooling water return pipe 11, respectively. The cooling water valve 21 may be connected to the host computer and controlled by the host computer.
Optionally, an oil pressure gauge 22 is provided at the outlet end of the hot oil pump 3. The oil pressure gauge 22 detects the pressure of the hot oil pumped by the hot oil pump 3.
When in use, (1) the preheating-heating step (see figure 1): after the first oil valve 16, the third oil valve 18 and the fourth oil valve 20 are opened, the heat conduction oil heater 1 prepares heat conduction oil, and the heat conduction oil is conveyed to a roller heat exchange mechanism 5 on a production line through a heat conduction oil outflow pipe 2, a heat oil pump 3 and a first communication pipe 4 under the suction action of the heat oil pump 3; after heat exchange is carried out between the heat conduction oil and the roller in the roller heat exchange mechanism 5 (namely, the roller absorbs heat to raise the temperature and the heat conduction oil releases heat to lower the temperature), the heat conduction oil flows back to the heat conduction oil heater 1 through the heat conduction oil return pipe 6 to be heated again, and the circulation is carried out until the temperature of the roller reaches the temperature required by preheating. (2) a cooling link (see fig. 3): when the roller is required to be cooled, the communication valve 19, the second oil valve 17 and the cooling water valve 21 are opened, other valves are closed, and the refrigerator 7 and the cooling pump 9 are simultaneously opened. The hot oil pump 3 pumps heat conduction oil at the roller heat exchange mechanism 5 into the oil cooler 10 through the second communicating pipe 14 and the oil inlet pipe 12; meanwhile, the cooling pump 9 pumps cooling water prepared in the refrigerator 7 into the oil cooler 10 through the cooling water outflow pipe 8, the cooling water and the heat conduction oil exchange heat fully in the oil cooler 10, and the cooled heat conduction oil is sent to the roller heat exchange mechanism 5 again through the oil outlet pipe 13 and the first communication pipe 4 to exchange heat with the roller, so that the temperature of the roller is reduced; the heat transfer oil after absorbing the heat of the roller is pumped into the oil cooler 10 by the hot oil pump 3 again for cooling, and the circulation is performed until the temperature of the roller is reduced to the temperature required by the process.
Compared with the prior art, the utility model has the following beneficial effects: (1) According to the utility model, through the arrangement of the first circulation channel, the second circulation channel and the third circulation channel, the functions of cooling and preheating the roller can be flexibly switched, and the temperature requirements of different film products on the preheating roller can be met. (2) According to the utility model, the heat exchange and the cooling are carried out on the roller in a way of gradually cooling the heat conduction oil, the cooling process is stable, the service life of the roller is not influenced, the defect that the final roller temperature is determined by repeated experiments due to large temperature difference is avoided, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a heating system in the prior art and a preheating and heating link of the utility model;
FIG. 2 is a schematic view of the overall structure of the heating-cooling system of the present utility model;
FIG. 3 is a schematic diagram of a cooling element according to the present utility model;
in the figure: 1. the device comprises a heat conducting oil heater, a heat conducting oil outflow pipe, a heat oil pump, a first communication pipe, a roller heat exchange mechanism, a heat conducting oil backflow pipe, a refrigerator, a cooling water outflow pipe, a cooling pump, a cooling oil cooler, a cooling water return pipe, a cooling water inlet pipe, a cooling water outlet pipe, a second communication pipe, a filter, a first oil valve, a second oil valve, a third oil valve, a communication valve, a fourth oil valve, a cooling water valve and an oil pressure meter.
Detailed Description
The present utility model will be further described with reference to the drawings and examples, but the scope of the present utility model is not limited by the examples.
Example 1
As shown in fig. 1 to 3, a temperature adjusting device for an MDO preheating roller includes a conduction oil heater 1, a conduction oil outflow pipe 2, a heating oil pump 3, a first communication pipe 4, a roller heat exchange mechanism 5, and a conduction oil return pipe 6 which are sequentially communicated and constitute a first circulation passage, and further includes a refrigerator 7, a cooling water outflow pipe 8, a cooling pump 9, an oil cooler 10, and a cooling water return pipe 11 which are sequentially communicated and constitute a second circulation passage; the oil cooler 10 is connected to the first communication pipe 4 in a tapping way through an oil inlet pipe 12 and an oil outlet pipe 13; the inlet end of the hot oil pump 3 and the outlet end of the roller heat exchange mechanism 5 are also communicated with a second communicating pipe 14, so that a third circulation channel is formed among the roller heat exchange mechanism 5, the hot oil pump 3 and the oil cooler 10; the device also comprises an upper computer which is respectively and electrically connected with the heat conduction oil heater 1, the hot oil pump 3, the refrigerator 7 and the cooling pump 9. The oil cooler 10 of the present utility model uses a stainless steel tube-in-tube type oil cooler. The oil inlet pipe 12 and the oil outlet pipe 13 are both stainless steel hoses. The cooling water outflow pipe 8 and the cooling water return pipe 11 are connected by adopting a hard pipe and a hose. The upper computer can control the on and off of the heat conduction oil heater 1, the hot oil pump 3, the refrigerator 7 and the cooling pump 9.
Wherein a filter 15 is provided on the second communication pipe 14. The shell and tube oil cooler is suitable for cooling low-viscosity and cleaner oil. The filter 15 is added to filter the hot oil flowing through the tube-in-tube oil cooler.
Wherein, be provided with temperature sensor in roller heat transfer mechanism 5, temperature sensor is connected with the host computer communication. The temperature sensor is used for monitoring the temperature of the roller in real time and feeding back temperature information to the upper computer.
Wherein, the heat conduction oil outflow pipe 2 is provided with a first oil valve 16; the oil inlet pipe 12 and the oil outlet pipe 13 are respectively provided with a second oil valve 17; the conduction oil return pipe 6 is provided with a third oil valve 18; a fourth oil valve 20 is arranged at the pipeline of the first communication pipe 4 between the oil inlet pipe 12 and the oil outlet pipe 13; the second communication pipe 14 is provided with a communication valve 19. The first oil valve 16, the second oil valve 17, the third oil valve 18, the fourth oil valve 20 and the communication valve 19 are all arranged to be connected with an upper computer and controlled by the upper computer.
Wherein, the cooling water outflow pipe 8 and the cooling water return pipe 11 are provided with cooling water valves 21; and the cooling water return pipe 11 is also provided with a pressure gauge and a thermometer. The pressure gauge and the temperature gauge may be used to detect the pressure and the temperature of the water in the cooling water return pipe 11, respectively. The cooling water valve 21 is connected with the upper computer and controlled by the upper computer.
Wherein the outlet end of the hot oil pump 3 is provided with an oil pressure gauge 22. The oil pressure gauge 22 detects the pressure of the hot oil pumped by the hot oil pump 3.
When in use, (1) the preheating-heating step (see figure 1): after the first oil valve 16, the third oil valve 18 and the fourth oil valve 20 are opened, the heat conduction oil heater 1 prepares heat conduction oil, and the heat conduction oil is conveyed to a roller heat exchange mechanism 5 on a production line through a heat conduction oil outflow pipe 2, a heat oil pump 3 and a first communication pipe 4 under the suction action of the heat oil pump 3; after heat exchange is carried out between the heat conduction oil and the roller in the roller heat exchange mechanism 5 (namely, the roller absorbs heat to raise the temperature and the heat conduction oil releases heat to lower the temperature), the heat conduction oil flows back to the heat conduction oil heater 1 through the heat conduction oil return pipe 6 to be heated again, and the circulation is carried out until the temperature of the roller reaches the temperature required by preheating. (2) a cooling link (see fig. 3): when the roller is required to be cooled, the communication valve 19, the second oil valve 17 and the cooling water valve 21 are opened, other valves are closed, and the refrigerator 7 and the cooling pump 9 are simultaneously opened. The hot oil pump 3 pumps heat conduction oil at the roller heat exchange mechanism 5 into the oil cooler 10 through the second communicating pipe 14 and the oil inlet pipe 12; meanwhile, the cooling pump 9 pumps cooling water prepared in the refrigerator 7 into the oil cooler 10 through the cooling water outflow pipe 8, the cooling water and the heat conduction oil exchange heat fully in the oil cooler 10, and the cooled heat conduction oil is sent to the roller heat exchange mechanism 5 again through the oil outlet pipe 13 and the first communication pipe 4 to exchange heat with the roller, so that the temperature of the roller is reduced; the heat transfer oil after absorbing the heat of the roller is pumped into the oil cooler 10 by the hot oil pump 3 again for cooling, and the circulation is performed until the temperature of the roller is reduced to the temperature required by the process.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (6)
1. The utility model provides a temperature adjustment device for MDO preheats roller, includes heat conduction oil heater (1), heat conduction oil outlet pipe (2), hot oil pump (3), first communication pipe (4), roller heat transfer mechanism (5) and heat conduction oil back flow (6) that communicate in proper order and constitute first circulation passageway, its characterized in that: the system also comprises a refrigerator (7), a cooling water outflow pipe (8), a cooling pump (9), an oil cooler (10) and a cooling water return pipe (11) which are communicated in sequence and form a second circulation channel; the oil cooler (10) is connected to the first communication pipe (4) in a tapping way through an oil inlet pipe (12) and an oil outlet pipe (13); the inlet end of the hot oil pump (3) is also communicated with the outlet end of the roller heat exchange mechanism (5) to form a second communicating pipe (14), so that a third circulating channel is formed among the roller heat exchange mechanism (5), the hot oil pump (3) and the oil cooler (10); the intelligent cooling system further comprises an upper computer, wherein the upper computer is electrically connected with the heat conduction oil heater (1), the hot oil pump (3), the refrigerator (7) and the cooling pump (9) respectively.
2. The temperature adjustment device for an MDO pre-heating roller according to claim 1, wherein: the second communicating pipe (14) is provided with a filter (15).
3. The temperature adjustment device for an MDO pre-heating roller according to claim 1, wherein: the roller heat exchange mechanism (5) is provided with a temperature sensor, and the temperature sensor is in communication connection with the upper computer.
4. The temperature adjustment device for an MDO pre-heating roller according to claim 1, wherein: the heat conduction oil outflow pipe (2) is provided with a first oil valve (16); the oil inlet pipe (12) and the oil outlet pipe (13) are respectively provided with a second oil valve (17); the heat conduction oil return pipe (6) is provided with a third oil valve (18); a fourth oil valve (20) is arranged at the pipeline position of the first communication pipe (4) between the oil inlet pipe (12) and the oil outlet pipe (13); the second communicating pipe (14) is provided with a communicating valve (19).
5. The temperature adjustment device for an MDO pre-heating roller according to claim 1, wherein: the cooling water outflow pipe (8) and the cooling water return pipe (11) are respectively provided with a cooling water valve (21); and the cooling water return pipe (11) is also provided with a pressure gauge and a thermometer.
6. The temperature adjustment device for an MDO pre-heating roller according to claim 1, wherein: an oil pressure gauge (22) is arranged at the outlet end of the hot oil pump (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321610077.1U CN220146472U (en) | 2023-06-25 | 2023-06-25 | Temperature adjusting device for MDO preheating roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321610077.1U CN220146472U (en) | 2023-06-25 | 2023-06-25 | Temperature adjusting device for MDO preheating roller |
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| Publication Number | Publication Date |
|---|---|
| CN220146472U true CN220146472U (en) | 2023-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321610077.1U Active CN220146472U (en) | 2023-06-25 | 2023-06-25 | Temperature adjusting device for MDO preheating roller |
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| CN (1) | CN220146472U (en) |
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2023
- 2023-06-25 CN CN202321610077.1U patent/CN220146472U/en active Active
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