CN110936640B - Heating belt, organic glass annealing system and control method - Google Patents
Heating belt, organic glass annealing system and control method Download PDFInfo
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- CN110936640B CN110936640B CN201911260174.0A CN201911260174A CN110936640B CN 110936640 B CN110936640 B CN 110936640B CN 201911260174 A CN201911260174 A CN 201911260174A CN 110936640 B CN110936640 B CN 110936640B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
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Abstract
The invention provides a heating belt, an organic glass annealing system and a control method, relates to the technical field of organic glass material heat treatment, and mainly aims to provide a water circulation organic glass annealing system with a regular temperature distribution. The organic glass annealing system comprises a circulating system, a heating belt and a control system, wherein the control system controls the circulating system to work, the circulating system comprises a water storage device, a temperature regulating device and a power device, a water inlet and a water outlet of the heating belt are connected with the water storage device and are driven by the power device to realize the circulating flow of water, and the temperature regulating device heats or cools water contained in the water storage device. The heating belt comprises a water delivery pipe with openings at two ends, the water delivery pipe is spirally arranged by taking the water outlet as the center so as to form a coil pipe, and hot water and the water delivery pipe exchange heat; thereby the lateral wall interconnect of raceway makes the coil pipe be the banding, and the middle pipeline of this coil pipe structure is thin in the width direction, and the edge pipeline is thick, and the pipeline interval diminishes gradually.
Description
Technical Field
The invention relates to the technical field of organic glass material heat treatment, in particular to a heating belt, an organic glass annealing system and a control method.
Background
Annealing is an important link in the process of bonding and polymerizing organic glass, and the traditional annealing process for the organic glass adopts a heating belt to heat up, so that the strength of the bonding seam of the organic glass meets the requirement. Firstly, the resistance wire heating belt used in the prior art has an aging phenomenon after long-term use, and meanwhile, organic glass is used as a high polymer material, MMA contained in a monomer of the organic glass has a volatile property, so that resistance wire heating has a large potential safety hazard; in addition, the temperature rise curve of the resistance wire in the heating process is difficult to accurately control, so that strict temperature rise, heat preservation and temperature reduction curve processes cannot be realized (for organic glass materials, the annealing temperature curve has great influence on the quality of a bonding seam, and if the temperature cannot be accurately controlled, the bonding seam after annealing is likely to introduce a new residual stress problem); finally, due to the above reasons, the surface of the organic glass cannot form regular temperature distribution, so that the thermal stress is too large, and therefore, the conventional annealing system for the electric heating belt has a certain probability of cracking the sheet material in use, especially a large-sized organic glass sheet.
Therefore, based on the above problems, it is necessary to develop a new annealing system for organic glass.
Disclosure of Invention
The invention aims to provide a heating belt, an organic glass annealing system and a control method, which are used for solving the problem of irregular temperature distribution of the annealing system in the prior art, so that the risk of cracking of a plate is reduced.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a heating belt, which comprises a water pipe with openings at two ends, wherein the water pipe is spirally arranged by taking a water outlet as a center so as to form a coil pipe, hot water flows into the coil pipe through a water inlet of the water pipe and flows out through the water outlet so as to exchange heat with the coil pipe, so that the temperature of the water inlet is higher than that of the water outlet; the side wall of the water conveying pipe extends outwards so as to connect adjacent pipelines of the coil pipe to form a strip-shaped part; the contact surface of the inner side wall of the pipeline with the unit length in the edge area of the strip-shaped piece is larger than the contact surface of the inner diameter of the pipeline with the unit length in the central area, so that the heat exchange effect of the edge area of the strip-shaped piece is larger than that of the middle area.
The water delivery pipe inside the heating belt is spirally arranged from outside to inside, wherein the water inlet is close to the outside of the heating belt, the water outlet is positioned in the middle of the heating belt, and the input water can generate heat exchange with the external environment, so that the heating belt can generate step-like regular change of the internal and external temperatures when in use; the contact area of the inner diameter of the unit length water conveying pipe in the edge area is larger than the contact area of the inner side wall of the unit length water conveying pipe in the middle area, so that water in the water conveying pipe in the edge area can be fully subjected to heat exchange with a pipeline, the characteristics of high edge temperature and low intermediate temperature of the heating belt are further ensured, and the risk of cracking of the plate is reduced.
In the above technical solution, preferably, a space exists between adjacent pipes of the coil, wherein the space of the edge area is smaller than the space of the middle area.
By adjusting the layout of the pipelines, the density of the water conveying pipe positioned on the outer ring of the heating belt is higher than that of the water conveying pipe positioned inside the heating belt, so that the edge part of the heating belt has better heat energy.
In the above technical solution, preferably, the inner diameter of the pipe in the edge area of the band is larger than the inner diameter of the pipe in the middle area.
In unit length, the inner diameter of the water pipe in the edge area is larger than that of the water pipe in the middle area, so that the surface area of the water pipe in unit length is different, and the heat exchange efficiency between water and pipelines is influenced.
In the above technical solution, preferably, a heat conduction layer is disposed on a side of the band-shaped member close to the heating surface, and/or a heat insulation layer is disposed on a side of the band-shaped member close to the air surface.
The invention also provides an organic glass annealing system which comprises the heating belt and the circulating system, wherein the circulating system comprises a water storage device, a temperature adjusting device and a power device, the water inlet and the water outlet of the heating belt are connected with the water storage device and realize the circulating flow of water under the driving of the power device, and the temperature adjusting device heats or cools the water contained in the water storage device so as to adjust the temperature of the heating belt.
The water which is positioned in the water storage device and is regulated to the required temperature by the temperature regulating device circularly flows along the arrangement of the water conveying pipe in the heating zone under the driving of the power device. Compared with the traditional resistance wire heating belt annealing system, the temperature distribution is more regular and controllable, and potential safety hazards possibly generated by resistance type heating are avoided.
In the above technical solution, preferably, the temperature adjusting device includes a heating component and a cooling component, wherein the heating component is an electric heating component fixedly installed in the water storage device;
the cooling assembly comprises a water bath device and a backflow device, the water bath device is sleeved outside the water storage device, and cooling water circularly flows into the water bath device through the backflow device so as to cool water in the water storage device;
or, the cooling assembly comprises a water receiver containing cooling water and a communicating pipe, the communicating pipe is communicated with the water receiver and the water storage device, and the cooling water in the water receiver flows into the water storage device through the communicating pipe, so that the temperature of the water in the water storage device is reduced.
Heating water through an electric heating assembly, and annealing the organic glass through the water; in the annealing and cooling process, the water temperature needs to be reduced, and the cooling can be realized by low-temperature water bath cooling or a mode of mixing low-temperature liquid and high-temperature liquid; the temperature curve in the annealing process is more accurate and controllable by the heating and cooling mode.
In the above technical solution, preferably, the control system further includes a processor, a data acquisition device and an execution device, the processor is electrically connected to the processor, and the processor receives data acquired by the data acquisition device and starts the corresponding execution device according to the data, so as to adjust the working state of the circulation system.
In the above technical solution, preferably, the data acquisition device includes at least one of a temperature sensor, a pressure sensor and a flow indicator installed in the water storage device and/or the heating zone; the executing device comprises at least one of a flow controller and a valve which are arranged in the water storage device and the heating belt.
In the above technical solution, preferably, the processor is a PLC processor, and the processor is capable of determining a required temperature control curve and heating zone temperature distribution data and generating a temperature control command according to the temperature control curve, the heating zone temperature distribution data, and data received by the data acquisition device, so as to adjust a working state of the execution device.
The invention also provides a control method of the organic glass annealing system, which comprises the following steps:
(1) setting a temperature control curve and heating belt temperature distribution data, and generating a temperature control instruction containing control parameters based on the temperature control curve, the heating belt temperature distribution data and related data received by the data acquisition device;
(2) and controlling the circulation system to work based on the temperature control instruction.
Compared with the prior art, the invention provides the heating belt, the organic glass annealing system and the control method, wherein the heating belt realizes regular distribution of temperature along the width direction of the heating belt by controlling the arrangement, the pipe diameter and the like of the water conveying pipe; the organic glass annealing system adopts a water circulation heating mode to replace the traditional heating of a resistance wire heating belt, so that the danger caused by the aging, short circuit and other reasons of the resistance wire heating belt is avoided; meanwhile, a control system is added in the system, and the control system can acquire relevant data signals in real time and feed back the relevant data signals to the processor for processing, so that an annealing temperature curve is strictly controlled, new residual stress is prevented from being introduced into the plate in the annealing process, and the risk of plate cracking is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the distribution of water transport tubes in a heating zone according to the present invention;
FIG. 2 is a schematic cross-sectional view of a heating belt according to the present invention;
FIG. 3 is a schematic view of the temperature distribution across the width of the heating belt of FIG. 1;
fig. 4 is a schematic structural view of the plexiglass annealing system of the present invention.
Reference numerals: 1. a central region water delivery pipe; 2. a water delivery pipe at the edge area; 3. fixing glue; 4. a heat conductive layer; 5. an insulating layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate orientations or positional relationships based on those shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.
FIG. 1 is a schematic diagram of the distribution of water pipes in a heating zone according to the present invention; the positions of the water inlet and the water outlet are clearly marked in the figure, wherein the water inlet is positioned at the outer side of the heating belt which is spirally arranged, and the water outlet is positioned at the middle part of the heating belt.
FIG. 2 is a schematic cross-sectional view of a heating belt according to the present invention; the water pipe comprises a three-part structure, wherein the heat conduction layer is positioned on one side, close to a heating surface (organic glass needing annealing treatment), of the water pipe, and the heat insulation layer is positioned on one side, close to an air surface, of the water pipe, so that the one-way heat conduction function is met.
FIG. 3 is a schematic view showing a temperature distribution in the width direction of the heating belt in FIG. 1; because the temperature of the outer ring of the heating belt is higher than that of the inner ring, the temperature of the heating belt has the characteristics of high two sides and low middle, and the temperature of the heating belt at the moment is distributed in a bilateral symmetry mode in the width direction.
FIG. 4 is a schematic diagram of the construction of the plexiglass annealing system of the present invention; as can be clearly seen from the figure, water in the water storage device is driven by a pump (i.e. a power device) to circularly flow in the water conveying pipe in the heating zone, and a heating assembly is arranged in the water storage device; the cooling assembly comprises a water bath device and a reflux device, wherein the water bath device is sleeved outside the water storage device, and cooling water circularly flows into the water bath device through the reflux device so as to cool water in the water storage device; in the device, different sensors are installed at related components, signals received by the sensors are collected by a data acquisition card (namely a data collection device) and then are transmitted to a man-machine interaction platform, and a PLC controller controls corresponding execution devices to execute actions, so that the regulation and control of the organic glass annealing system are realized.
As shown in fig. 1 to 3, the present invention provides a heating belt, which includes a water pipe, the water pipe is spirally arranged in a coil structure with a water outlet as a center, and a side wall of the water pipe extends outward to connect adjacent pipes of the coil structure, thereby forming a belt-shaped member, and the belt-shaped member is a heating belt; the water inlet of the water pipe is positioned outside the heating belt, the water outlet of the water pipe extends outwards from the middle part of the coil pipe to the side edge of the heating belt, and hot water flows in through the water inlet of the water pipe and flows out of the water outlet of the water pipe and exchanges heat with the heating belt at the same time, so that the heating belt can supply heat to the to-be-heated objects.
Specifically, the heating belt is integrally similar to a mosquito coil structure. When the bonding seam of the organic glass needs to be annealed, the whole structure of the heating belt can be arranged to be strip-shaped, as shown in fig. 1. When the length of the seam between the organic glass to be annealed is 3000mm, the size of the heating belt is 3000mm × 450mm, at this time, the heating belt is divided into three areas in the width direction, the two side edge areas are high temperature areas, the width of the heating belt is 150mm, the central area is a relatively low temperature area, and the width of the heating belt is 150 mm.
It should be noted that the heating belt is symmetrical in temperature right and left in this case, as shown in fig. 3.
In order to further improve the heat exchange effect between the heating belt and water, and simultaneously ensure the stepped distribution of the temperature in the pipeline, and reduce the risk of cracking of the plate, as an optional implementation manner, the contact surface between the inner side wall of the edge area of the heating belt in the unit length of the water conveying pipe and the water is larger than the water conveying pipe in the central area of the heating belt.
Specifically, the inner diameter contact surface of the water delivery pipe with unit length in the edge region is larger than that of the water delivery pipe with unit length in the central region, and various different implementation modes are provided, such as:
the inner diameter of the water pipe at the edge area is larger than that of the water pipe at the central area: at the moment, the inner diameter of the water conveying pipe can be gradually reduced from the water inlet to the water outlet; or the inner diameter of the water pipe can be gradually reduced in a stepped manner, for example, the inner diameter is reduced by 1mm every 500mm, or the inner diameter of each circle of the water pipe is reduced by 1mm, or the inner diameters of the edge areas are the same, and the inner diameters of the middle areas are the same, as shown in fig. 2.
The above implementation is only used as a reference for one possible implementation and not as a limitation on the technical solution.
Because the temperature distribution of the heating belt is in a step-shaped distribution and a distance exists between adjacent water conveying pipes forming the heating belt, as an optional implementation mode, the distance between the edge areas of the coil pipe device is smaller than that between the middle areas of the coil pipe device, so that the density distribution of coil pipe pipelines is realized, and the edge parts of the heating belt have better heat energy.
In order to reduce the heat loss of the heating belt and ensure the efficiency of the one-way heat conduction function, as an optional embodiment, the heating belt is composed of a multilayer structure, as shown in fig. 2, wherein the middle part of the heating belt is in a structure of a fluid pipeline and a fixing adhesive 3 of the pipeline, a heat conduction layer 4 is arranged on one side close to the heating element, and a heat insulation layer 5 is arranged on one side close to the air surface.
Specifically, the heat conduction layer is made of a heat conduction silica gel pad with the heat conduction coefficient of 0.8-3W/Mk, and the heat insulation layer is made of a low-density silica gel material with the heat conduction coefficient of 0.12W/Mk, so that unidirectional temperature conduction is realized, and energy consumption loss is reduced.
Through the design, the heating belt with the temperature distributed in a step shape and low energy consumption can be provided.
As shown in fig. 4, the invention further provides an organic glass annealing system, which comprises any one of the heating belt and a circulating system, wherein the circulating system comprises a water storage device, a temperature adjusting device and a power device, the water storage device is used for storing water to be treated, a water inlet and a water outlet of the heating belt are both connected with the water storage device and are driven by the power device to realize circulating flow of the water, and the temperature adjusting device is used for heating or cooling the water contained in the water storage device, so that the water temperature in the heating belt meets the processing requirement. The water circulates between the heating zone and the water storage device under the driving of the driving device.
Compare with traditional resistance wire heating band annealing system, the device has avoided the potential safety hazard that ageing and MMA that the resistance-type heating probably produced volatilize etc. and lead to, and the device can strictly come accurate control temperature according to intensification, heat preservation and the cooling curve process in the annealing process simultaneously to effectively avoid panel because of stress problem fracture.
The drive means is a hydraulic pump. Simultaneously, in order to effectively control the liquid flow and the temperature difference in the heating zone, a hydraulic electromagnetic flow proportional valve is also installed: due to the effect of heat exchange, the closer the liquid in the heating belt is to the water outlet, the lower the temperature of the liquid is; and when the velocity of flow of liquid is very fast, the heat exchange rate of liquid is lower this moment, can reduce the difference in temperature between water inlet and the delivery port, on the contrary, when the velocity of flow of liquid is slower, fully carry out the heat exchange between liquid and the raceway this moment, therefore the pipeline liquid temperature that is close to delivery port department is lower. The electromagnetic flow proportional valve can effectively realize the control of the flow, and further realize the requirement of 3-10 ℃ of temperature difference between the middle area and the edge area of the heating belt.
As an optional embodiment, the temperature adjusting device comprises a heating component and a cooling component, wherein the heating component is an electric heating component fixedly installed in the water storage device; the cooling assembly comprises a water bath device and a reflux device, the water bath device is sleeved outside the water storage device, and cooling water circularly flows into the water bath device through the reflux device so as to cool water in the water storage device; or the cooling assembly comprises a water storage device and a communicating pipe, wherein the water storage device and the water storage device are filled with cooling water, and the communicating pipe is communicated with the water storage device and the cooling water in the water storage device flows into the water storage device through the communicating pipe, so that the water temperature in the water storage device is reduced.
Heating the liquid through an electric heating assembly, and annealing the organic glass through high-temperature liquid; in the annealing treatment process, the temperature of the heating zone needs to be reduced when the annealing treatment process enters a temperature reduction stage, namely the water temperature is reduced, and the annealing treatment process can be realized by cooling in a low-temperature water bath or mixing a low-temperature liquid and a high-temperature liquid.
The cooling assembly in fig. 4 is a water bath device and a backflow device, wherein the water bath device is arranged outside the water storage device, and the backflow assembly can realize the circulating flow of cooling water. The cooling water in the water bath device circularly flows under the action of the backflow component, the cooling water flows through the outer surface of the water storage device and exchanges heat with the water storage device, and the cooling water takes away the heat of the water in the water storage device in the circulating process, so that the temperature of the water in the water storage device is reduced. The temperature curve in the annealing process is more accurate and controllable by the heating and cooling mode.
The water in the water bath device is not communicated with the water in the water storage device.
It should be noted that when the cooling assembly includes a water reservoir containing cooling water and a communication pipe, a pump and a liquid electromagnetic proportional valve are additionally installed to control the flow rate and flow rate of the cooling liquid in the water reservoir flowing into the water storage device, and the water in the water reservoir is communicated with the water in the water storage device.
In order to conveniently control the work of the device and reduce errors possibly generated by manual operation, as an optional embodiment, the organic glass annealing system further comprises a control system, wherein the control system comprises a processor, a data acquisition device and an execution device which are electrically connected, and the processor receives data acquired by the data acquisition device and starts the corresponding execution device according to the data, so that the working state of the circulating system is adjusted.
The data acquisition device comprises at least one of a temperature sensor, a pressure sensor and a flow indicator which are arranged in the water storage device and/or the heating belt; the actuating device comprises at least one of a flow controller and a liquid electromagnetic proportional valve which are arranged in the water storage device and the heating belt, and the specific installation condition is shown in figure 4.
The processor is a PLC processor, can determine a required temperature control curve and heating belt temperature distribution data through the processor, and generates a temperature control instruction according to the temperature control curve, the heating belt temperature distribution data and the data received by the data acquisition device so as to adjust the working state of the execution device.
It should be noted that the control system further includes a human-computer interaction platform, through which the working condition of the system can be clearly seen, and at the same time, the user can also input relevant parameters (such as a temperature control curve) through the platform.
In the control system, the input of various parameters (such as temperature curve, pump, flow proportional valve and other control parameters) can be carried out through the interactive interface of the human-computer interaction platform, and then the parameters are transmitted to the PLC controller, and the PLC controller can control the valve, the silicon controlled voltage regulator, the switch, the pump and the like:
when water stored in the water storage device needs to be heated to a preset temperature, the control system is communicated with a power switch of the heating assembly and adjusts the voltage of the resistance wire through the silicon controlled voltage regulator, so that the control of the heating power of the resistance wire is realized; when the water temperature in the water storage device exceeds a preset value, the water storage device can be cooled in a natural cooling or cooling water cooling (namely, a cooling assembly) mode: when the cooling water is selected for cooling, the flow of the cooling water can be controlled by opening the 2/2 flow proportional valve and the liquid flow meter, and the water in the water storage device is cooled.
When the organic glass bonding seam needs to be annealed through the heating belt, the control system starts the pump to work and is communicated with the 2/2 flow proportional valve to realize the circulating flow of water in the heating belt. In order to realize the effect of temperature step distribution in the heating zone, the heating zone can realize the following effects by controlling the flow rate of circulating water in the pipeline through a control system besides carrying out various physical designs on an internal pipeline structure: the temperature difference between the middle area and the edge area of the heating belt can be increased by reducing the flow rate of the circulating water, and the temperature difference between the middle area and the edge area of the heating belt can be reduced by increasing the water circulation rate.
In addition, it should be noted that the control system has a feedback function, and can acquire signals at the water storage device and the heating zone in real time and feed the signals back to the control system, so that the feedback control of the whole system is realized.
The control system needs to control two temperatures simultaneously when in work: one is temperature increase and decrease at the heating zone, and the other is temperature distribution at the heating zone. The temperature curve is controlled by heating water through a resistance wire to raise the temperature and cooling water to lower the temperature through circulation; the temperature distribution of the heating belt is controlled by adjusting the water circulation speed, the water temperature and the structure of the heating belt.
The invention also provides a control method of the organic glass annealing system, which comprises the following steps:
(1) setting a temperature control curve and heating belt temperature distribution data, and generating a temperature control instruction containing control parameters based on the temperature control curve, the heating belt temperature distribution data and related data received by the data acquisition device;
(2) and controlling the circulation system to work based on the temperature control instruction.
When the data acquisition device detects that the temperature difference between the middle area temperature and the edge area temperature of the heating belt is large, the control system can drive the execution device to work, and the temperature difference is reduced by increasing the flow speed of liquid in the heating belt; conversely, the temperature difference is increased by decreasing the flow rate.
When the system is used, the input of relevant parameters can be firstly carried out through a human-computer interaction interface, and then the system is controlled to carry out automatic processing.
Compared with the traditional heating annealing equipment, the organic glass annealing system works based on water circulation heating, has higher safety, and simultaneously reduces the energy consumption of the system during working; meanwhile, the temperature control device with the temperature feedback system is adopted in the system to automatically control the temperature of the heating belt according to a set temperature curve, the internal pipeline layout of the heating belt is optimized, the middle temperature of the heating belt is low, the edge temperature of the heating belt is high, the annealing cracking risk of the organic glass plate is reduced, and the quality of the organic glass bonding polymerization seam is improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. The heating belt is characterized by comprising a water pipe with openings at two ends, wherein the water pipe is spirally arranged by taking a water outlet as a center so as to form a coil pipe, hot water flows into the coil pipe through a water inlet of the water pipe and flows out through the water outlet so as to exchange heat with the coil pipe, so that the temperature of the water inlet is higher than that of the water outlet; the side wall of the water conveying pipe extends outwards so as to connect adjacent pipelines of the coil pipe to form a strip-shaped part; the inner diameter of the unit length pipeline in the edge area of the strip-shaped piece is larger than that of the unit length pipeline in the central area, so that the heat exchange effect of the edge area of the strip-shaped piece is larger than that of the central area.
2. The heating belt according to claim 1, wherein there is a spacing between adjacent pipes of the water duct, wherein the spacing of the edge region is smaller than the spacing of the central region.
3. A heating belt according to claim 1, characterized in that the side of the belt-like element adjacent to the heating surface is provided with a heat conducting layer and/or the side of the belt-like element adjacent to the air surface is provided with a heat insulating layer.
4. An organic glass annealing system, which is characterized by comprising the heating belt and the circulating system of any one of claims 1 to 3, wherein the circulating system comprises a water storage device, a temperature adjusting device and a power device, the water inlet and the water outlet of the heating belt are both connected with the water storage device and are driven by the power device to realize the circulating flow of water, and the temperature adjusting device heats or cools the water contained in the water storage device to adjust the temperature of the heating belt.
5. The plexiglass annealing system of claim 4, wherein the temperature regulating device comprises a heating assembly and a cooling assembly, wherein the heating assembly is an electrical heating assembly fixedly mounted within the water storage device;
the cooling assembly comprises a water bath device and a backflow device, the water bath device is sleeved outside the water storage device, and cooling water circularly flows into the water bath device through the backflow device to cool water in the water storage device;
or, the cooling assembly comprises a water storage device and a communicating pipe, wherein the water storage device and the water storage device are communicated through the communicating pipe, and the cooling water in the water storage device flows into the water storage device through the communicating pipe so as to reduce the temperature of the water in the water storage device.
6. The organic glass annealing system of claim 4, further comprising a control system, wherein the control system comprises a processor, a data acquisition device and an execution device which are electrically connected, and the processor receives the data acquired by the data acquisition device and starts the corresponding execution device according to the data to adjust the working state of the circulation system.
7. The plexiglas annealing system of claim 6, wherein the data acquisition device includes at least one of a temperature sensor, a pressure sensor, and a flow indicator mounted in the water storage device and/or the heating belt; the executing device comprises at least one of a flow controller and a valve which are arranged in the water storage device and the heating belt.
8. The plexiglas annealing system of claim 6 wherein the processor is a PLC processor, by which the required temperature control curve and heating strip temperature distribution data can be determined and temperature control commands generated based on the temperature control curve, heating strip temperature distribution data and data received by the data acquisition device to adjust the operating state of the actuator.
9. A method of controlling a glazing annealing system comprising the glazing annealing system of claim 5, using the method of:
(1) setting a temperature control curve and heating belt temperature distribution data, and generating a temperature control instruction containing control parameters based on the temperature control curve, the heating belt temperature distribution data and related data received by the data acquisition device;
(2) and controlling the circulation system to work based on the temperature control instruction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP0104673B1 (en) * | 1982-09-24 | 1987-11-19 | Onofrio Rocchitelli | Heating device for the glass washing fluid of motor vehicles and the like |
| US20060132045A1 (en) * | 2004-12-17 | 2006-06-22 | Baarman David W | Heating system and heater |
| JP4929866B2 (en) * | 2006-06-16 | 2012-05-09 | 株式会社ノーリツ | Heat exchanger and hot water device provided with the same |
| CN201282570Y (en) * | 2008-07-09 | 2009-07-29 | 周书忠 | Electric heating apparatus |
| CN103476159A (en) * | 2013-09-10 | 2013-12-25 | 扬中市金元化工电力设备厂 | Electric heater band |
-
2019
- 2019-12-10 CN CN201911260174.0A patent/CN110936640B/en active Active
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