CN112947633A - Temperature control method and foamed sheet production equipment - Google Patents
Temperature control method and foamed sheet production equipment Download PDFInfo
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- CN112947633A CN112947633A CN202110367870.2A CN202110367870A CN112947633A CN 112947633 A CN112947633 A CN 112947633A CN 202110367870 A CN202110367870 A CN 202110367870A CN 112947633 A CN112947633 A CN 112947633A
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
The application provides a temperature control method and a foamed plate production device. The temperature control method comprises the steps of obtaining the detected temperatures of a material in a first system and a material in a second system; wherein the first system is used for conveying materials into the second system; and adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature so as to enable the temperature of the material output by the second system to be within a preset temperature range. The temperature control method can improve the accuracy of temperature control.
Description
Technical Field
The application relates to the field of production and processing, in particular to a temperature control method and foamed plate production equipment.
Background
In the field of production and processing, for example, in the preparation of polyurethane boards, it is necessary to premix the materials and then mix the materials to form foams. In the related technology, the temperature control in the premixing process and the temperature control in the foaming process are manually set and adjusted by the experience of workers, and the uncertainty of the temperature in the foaming process is increased by the temperature control mode, so that the processing yield of the plate is low.
The above information disclosed in this background section is only for enhancement of understanding of the background of the application and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
It is an object of the present application to improve the accuracy of temperature control in a production process.
In order to solve the technical problem, the following technical scheme is adopted in the application:
according to an aspect of the present application, there is provided a temperature control method including:
acquiring the detection temperatures of the material in the first system and the material in the second system; wherein the first system is used for conveying materials into the second system;
and adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature so as to enable the temperature of the material output by the second system to be within a preset temperature range.
According to an embodiment of the present application, obtaining the detected temperature of the material in the first system and the material in the second system includes:
acquiring the material temperature at the inlet of the second system;
said adjusting the temperature of the material in the first system and/or the temperature of the material in the second system in dependence on the detected temperature comprises:
when the temperature of the material at the inlet of the second system is outside a first temperature range, the temperature of the material in the first system is reduced or increased so that the temperature of the material flowing to the inlet of the second system is within the first temperature range.
According to an embodiment of the present application, the decreasing or increasing the temperature of the material in the first system when the temperature of the material at the inlet of the second system is outside a first temperature range to bring the temperature of the material flowing to the inlet of the second system within the first temperature range comprises:
acquiring the temperature of a material in a first system;
increasing or decreasing the temperature of the material within the first system until the temperature of the material in the first system is in a second temperature range.
According to an embodiment of the present application, the method further comprises:
acquiring the ambient temperature of the first system;
and determining the second temperature range according to the first temperature range and the temperature of the environment where the first system is located.
According to an embodiment of the present application, the obtaining the detected temperatures of the material in the first system and the material in the second system includes:
detecting a temperature of the material in the second system;
said adjusting the temperature of the material in the first system and/or the temperature of the material in the second system in dependence on the detected temperature comprises:
when the temperature of the material in the second system exceeds a third temperature range, the temperature of the material in the second system is reduced or increased so that the temperature of the material in the second system is within the third temperature range.
According to an embodiment of the application, the second system comprises a first unit and a second unit, the first unit being located between the first system and the second unit; the method further comprises the following steps:
acquiring the material temperature at the inlet of the second unit;
when the temperature of the material at the second unit is outside a fourth temperature range, adjusting the temperature of the material in the first unit so that the temperature of the material flowing to the second unit is within the fourth temperature range.
According to another aspect of the present application, there is provided a foamed sheet production apparatus including:
a premix system comprising a plurality of intermediate tanks for storing the material; wherein a plurality of said intermediate tanks are used for storing different materials;
the foaming system comprises a plurality of foaming machine charging tanks and a material mixing unit communicated with the plurality of foaming machine charging tanks, and the plurality of foaming machine charging tanks are communicated with the plurality of intermediate tanks in a one-to-one correspondence manner so as to correspondingly receive materials flowing out of the intermediate tanks; the material mixing unit is used for receiving and mixing the materials output by the plurality of foaming machine charging buckets and spraying the foaming materials;
the temperature control system comprises a controller, a temperature detection assembly and a temperature adjusting assembly, wherein the temperature detection assembly and the temperature adjusting assembly are electrically connected with the controller, the temperature detection assembly is used for collecting the temperature of materials in the premixing system and the foaming system, and the controller controls the temperature adjusting assembly to adjust the temperature of the materials in the premixing system and/or the foaming system according to the sampling result of the temperature detection assembly so that the temperature of the mixing assembly is within a preset temperature range;
and the press system is used for receiving the foaming material sprayed out by the material mixing unit and pressing the foaming material to form a plate.
According to an embodiment of the application, the temperature detection assembly comprises a first temperature sensor, and the first temperature sensor is used for detecting the temperature of the material at the inlet of the material tank of the foaming machine; the temperature adjusting assembly comprises a first temperature adjusting unit, and the first temperature adjusting unit is used for adjusting the temperature of the materials in the premixing system;
when the temperature of the material at the inlet of the foaming machine tank exceeds a first temperature range, the controller controls the first temperature adjusting unit to lower or raise the temperature of the material in the premixing system so that the temperature of the material flowing to the inlet of the foaming machine tank is within the first temperature range.
According to an embodiment of the present application, the temperature detection assembly further includes a second temperature sensor for detecting a temperature of the material in the intermediate tank;
the first temperature adjustment unit includes a first heat exchanger disposed in the intermediate tank; and correspondingly increasing or decreasing the temperature of the material in the intermediate tank by enabling the first heat exchanger to release heat or absorb heat to the material in the intermediate tank until the temperature of the material in the intermediate tank is in a second temperature range.
According to an embodiment of the application, the temperature detection assembly further comprises a third temperature sensor, wherein the third temperature sensor is used for detecting the temperature of the environment where the premixing system is located;
the second temperature range is determined according to the first temperature range and the temperature of the environment in which the premixing system is located.
According to an embodiment of the application, the temperature control system further comprises a first control valve, and the first control valve is installed on a pipeline between the outlet of the intermediate tank and the inlet of the material tank of the foaming machine; a first circulating pipeline is also arranged between the outlet of the intermediate tank and the inlet of the material tank of the foaming machine;
when the material temperature at the inlet of the foaming machine charging bucket exceeds the first temperature range, the controller controls the first control valve to be closed and controls the first circulating pipeline to be opened so as to enable the material between the outlet of the intermediate tank and the inlet of the foaming machine charging bucket to flow back to the intermediate tank.
According to an embodiment of the application, the temperature detection assembly comprises a fourth temperature sensor, and the fourth temperature sensor is used for detecting the temperature of the material in the foaming machine material tank; the temperature adjusting assembly comprises a second temperature adjusting unit, and the second temperature adjusting unit is used for adjusting the temperature of the material in the material tank of the foaming machine;
the temperature control system also comprises a second control valve, and the second control valve is arranged on a pipeline between the outlet of the material tank of the foaming machine and the inlet of the material mixing unit;
when the material temperature of the foaming machine material tank exceeds a third temperature range, the controller controls the second control valve to be closed and controls the second temperature adjusting unit to reduce or raise the temperature of the material in the foaming machine material tank so as to enable the material temperature of the foaming machine material tank to be within the third temperature range.
According to an embodiment of the application, the temperature detection assembly comprises a fifth temperature sensor, and the fifth temperature sensor is used for detecting the temperature of the material at the mixing unit;
when the temperature of the material at the mixing unit exceeds a fourth temperature range, the controller controls the second temperature adjusting unit to reduce or increase the temperature of the material in the material tank of the foaming machine, so that the temperature of the material flowing to the mixing unit is within the fourth temperature range.
According to an embodiment of the present application, the temperature detection assembly further includes a sixth temperature sensor, and the sixth temperature sensor is configured to detect a temperature of an environment where the foaming system is located;
according to an embodiment of the application, a second circulation pipeline is further arranged between the outlet of the foaming machine charging bucket and the inlet of the mixing unit;
and when the material temperature at the inlet of the mixing unit exceeds a fourth temperature range, the controller controls the second circulation pipeline to be opened so as to enable the material between the outlet of the foaming machine charging bucket and the inlet of the mixing unit to flow back to the foaming machine charging bucket.
According to an embodiment of the application, the foamed sheet production equipment further comprises an upper computer which is communicated with the temperature control system;
the upper computer is used for storing the temperature data detected by the temperature detection assembly and displaying the temperature data.
According to the temperature control method, the detected temperatures of the materials in the first system and the materials in the second system are obtained; and according to the detected temperature, the material temperature in the first system and/or the material temperature in the second system are/is adjusted, so that the first system and the second system have the automatic temperature adjusting function, the reliability of temperature control is improved, and the unreliability brought by manual temperature control is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The above and other objects, features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
Fig. 1 is a schematic view illustrating a connection structure of a part of a system of a foamed sheet production apparatus according to an embodiment.
FIG. 2 is a circuit block diagram illustrating a temperature control unit according to one embodiment.
FIG. 3 is a flow chart illustrating temperature control of the premix system according to one embodiment.
Fig. 4 is a schematic structural diagram illustrating a first temperature adjustment unit according to an embodiment.
Fig. 5 is a flow chart illustrating temperature control of a foaming system according to an embodiment.
FIG. 6 is a flow diagram illustrating a temperature control method according to one embodiment.
The reference numerals are explained below: 1. a premix system; 101. a first storage tank; 102. a second storage tank; 103. a third storage tank; 11. a preceding stage storage tank; 12. a premixing station; 13. an intermediate tank; 13A, a first intermediate tank; 13B, a second intermediate tank;
2. a foaming system; 21. a foaming machine material tank; 21A, a first foaming machine tank; 21B, a second foaming machine material tank; 22. a mixing unit;
3. a temperature control system; 301. a first temperature sensor; 302. a second temperature sensor; 303. a third temperature sensor; 304. a fourth temperature sensor; 305. a fifth temperature sensor; 306. a sixth temperature sensor; 31. a first temperature adjusting unit; 32. a second temperature adjustment unit; 311. a first control valve A; 312. a first control valve B; 321. a second circulation control valve; 322. a second control valve; 33. a controller; 313. a first heat exchanger; 323. a second heat exchanger; 35. a water tank.
Detailed Description
While this application is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail only some specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the application and is not intended to limit the application to that as illustrated herein.
Thus, a feature indicated in this specification is intended to describe one of the features of an embodiment of the application and does not imply that every embodiment of the application must have the described feature. Further, it should be noted that this specification describes many features. Although some features may be combined to show a possible system design, these features may also be used in other combinations not explicitly described. Thus, the combinations illustrated are not intended to be limiting unless otherwise specified.
In the embodiments shown in the drawings, directional references (such as up, down, left, right, front, and rear) are used to explain the structure and movement of the various elements of the present application not absolutely, but relatively. These descriptions are appropriate when the elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indication of these directions changes accordingly.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present application and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
The preferred embodiments of the present application will be further described in detail below with reference to the accompanying drawings of the present specification.
The embodiment provides a temperature control method which can be used in various production and processing systems. In the following examples, the application to a foamed sheet production apparatus is exemplified. The foamed sheet production apparatus is used to produce foamed sheets, such as polyurethane sheets. The polyurethane board is a board body formed by foaming a polyurethane foaming material and then pressing and molding the foaming material. The polyurethane foaming material is a high molecular polymer which is prepared by using isocyanate and polyether as main raw materials, mixing the raw materials under the action of various auxiliary agents such as a foaming agent, a catalyst, a flame retardant and the like, and foaming through a high-pressure spraying phenomenon.
First, a structural example of the foamed sheet production apparatus will be described.
Fig. 1 is a schematic view illustrating a connection structure of a part of a system of a foamed sheet production apparatus according to an embodiment. In one embodiment, the foamed sheet production equipment comprises a premixing system 1, a foaming system 2, a temperature control system 3 and a press system. The premix system 1 comprises a plurality of intermediate tanks 13 for storing the materials, wherein the plurality of intermediate tanks 13 are for storing different materials, respectively; the foaming system 2 comprises a plurality of foaming machine material tanks 21 and a material mixing unit 22 communicated with the plurality of foaming machine material tanks 21, wherein the plurality of foaming machine material tanks 21 are communicated with the plurality of intermediate tanks 13 in a one-to-one correspondence manner so as to correspondingly receive materials flowing out of the intermediate tanks 13; the mixing unit 22 is configured to receive and mix the material output from the plurality of foaming machine buckets 21, and to eject the foaming material. The temperature control system 3 comprises a controller 33, and a temperature detection component and a temperature adjustment component which are electrically connected with the controller 33, wherein the temperature detection component is used for collecting the temperature of the materials in the premixing system 1 and the foaming system 2, and the controller 33 controls the temperature adjustment component to adjust the temperature of the materials in the premixing system 1 and/or the foaming system 2 according to the sampling result of the temperature detection component, so that the temperature of the material mixing component is in a preset temperature range. The press system is used for receiving the foaming material sprayed by the material mixing unit 22 and pressing the foaming material to form a plate.
This application scheme foaming panel production facility is provided with temperature control system 3, temperature control system 3 is including controller 33, temperature detect component and temperature regulation subassembly, temperature detect component gathers the temperature of material in premixing system 1 and foaming system 2, thereby make controller 33 premix the temperature of material in system 1 and/or foaming system 2 according to this temperature control, make premixing system 1 and foaming system 2 all have the automatic temperature regulation function, improved the reliability to mixing unit temperature control from this, the compounding and the foaming validity of mixing unit have been improved, the unreliability that the artificial control temperature brought has been avoided, this application scheme has improved the success rate of panel foaming.
The premix system 1 comprises a feed unit comprising a plurality of tanks. Each storage tank correspondingly stores one material. The storage tank has a larger volume than the intermediate tank 13 and the foaming machine tank 21. Polyurethane foams are used herein as an example. The materials mainly comprise a material A, a material B and a material C, wherein the material A comprises monomer polyether, and the material B comprises isocyanate; the material C is a catalyst, and can be cyclopentane in particular. The storage tanks are three, namely a first storage tank 101, a second storage tank 102 and a third storage tank 103, which are respectively used for storing a large amount of materials A, B and C.
The premix system 1 further comprises a backing tank 11 for temporarily storing the material B, the backing tank 11 being adapted to temporarily store a part of the material B, and a premix station 12, an inlet of the premix station 12 being connected to an outlet of the backing tank 11 and to an outlet of the third tank 103, the premix station 12 being adapted to premix the material B and the material C. And mixing the material B and the material C to form a material D.
In one example, there are two intermediate tanks 13, namely a first intermediate tank 13A and a second intermediate tank 13B, wherein the inlet of the first intermediate tank 13A is connected with the outlet of the storage tank a for storing the material a; the inlet of the second intermediate tank 13B is connected to the outlet of the above-mentioned premixing station 12 for storing the material D.
The foaming system 2 includes a foaming machine bucket 21. Here, there are two foaming machine tanks 21, which are a first foaming machine tank 21A and a second foaming machine tank 21B, respectively; the first foamer can 21A is connected to an outlet of the first intermediate tank 13A for receiving the material a, and the second foamer can 21B is connected to an outlet of the second intermediate tank 13B for receiving the material B.
The outlet of the first foaming machine bucket 21A and the outlet of the second foaming machine bucket 21B are connected with the mixing unit to mix the material A and the material D in the mixing unit, and the mixing unit sprays the mixed materials at high pressure to form high molecular polymers.
In this embodiment, the premixing system 1 includes a first temperature control system 3, and the first temperature control system 3 is capable of automatically controlling the temperature of the materials in the premixing system 1 within a specified range. In the following embodiments, the intermediate tank 13 refers to any one of the first intermediate tank 13A and the second intermediate tank 13B described above.
Referring to fig. 2 and 3, fig. 2 is a circuit block diagram of a temperature control unit according to an embodiment. FIG. 3 is a flow chart illustrating temperature control of the premix system 1 according to one embodiment. In one embodiment, the temperature detecting assembly comprises a first temperature sensor 301, wherein the first temperature sensor 301 is used for detecting the temperature of the material at the inlet of the foaming machine bucket 21; the temperature adjusting assembly comprises a first temperature adjusting unit 31, and the first temperature adjusting unit 31 is used for adjusting the temperature of the materials in the premixing system 1; when the temperature of the material at the inlet of the expander tank 21 exceeds the first temperature range, the controller 33 controls the first temperature adjusting unit 31 to lower or raise the temperature of the material in the premixing system 1 so that the temperature of the material flowing to the inlet of the expander tank 21 is within the first temperature range.
The temperature of the material in the foaming machine bucket 21 should be maintained within the first temperature range to meet the mixing requirement. Therefore, when the temperature of the material delivered to the foaming machine bucket 21 exceeds the upper limit value of the first temperature range or is lower than the lower limit value of the first temperature range, the first temperature control system 3 is required to readjust the temperature of the material in the premixing system 1.
Here, the controller 33 acquires the temperature of the first temperature sensor 301 in real time or at every preset time period. The controller 33 may here be a PLC, MCU, single chip or dedicated temperature control chip.
It will be appreciated that when the temperature at the inlet of the expander tank 21 exceeds the upper limit of the first temperature range, the first temperature regulating unit 31 is required to lower the temperature of the material in the premixing system 1. When the temperature at the inlet of the foaming machine bucket 21 is lower than the lower limit value of the first temperature range, the first temperature adjusting unit 31 needs to raise the temperature of the material in the premixing system 1.
Through setting up temperature control system 3 in this embodiment for the temperature of premixing system 1 and foaming system 2 can be mutual, and when the temperature of premixing system 1 at foaming machine material jar 21 entrance exceeded first temperature range, adjustment self temperature, thereby the material temperature of guaranteeing to transmit to foaming machine material jar 21 entrance satisfies the operation requirement.
There are various ways to adjust the temperature of the material in the premix system 1. In one embodiment, the temperature detection assembly further comprises a second temperature sensor 302, the second temperature sensor 302 being configured to detect a temperature of the material in the intermediate tank 13; the first temperature adjusting unit 31 includes a first heat exchanger 313 provided in the intermediate tank 13; by causing the first heat exchanger 313 to emit or absorb heat to the material in the intermediate tank 13 to correspondingly raise or lower the temperature of the material in the intermediate tank 13 until the temperature of the material in the intermediate tank 13 is in the second temperature range.
Fig. 4 is a schematic structural view of the first temperature adjustment unit 31 and the intermediate tank 13 according to an embodiment. The second temperature sensor 302 may be disposed within the intermediate tank 13. Or may be disposed to be adhered to the outer wall of the intermediate tank 13. The first heat exchanger 313 may be a coil pipe fixed in the intermediate tank 13 and having a water passage inside. The temperature control system 3 may include a water tank 35, a heater, and a refrigeration system, and the water tank 35 is communicated with the first heat exchanger 313 through a water supply line. A water valve is arranged on the water supply pipeline; the water tank 35 can be used for containing tap water or water with a specific temperature. Illustratively, when the temperature of the materials in the intermediate tank 13 needs to be raised, tap water is heated by a heater and then is conveyed to the first heat exchanger 313; when the temperature of the material in the intermediate tank 13 needs to be lowered, the tap water is cooled and then sent to the first heat exchanger 313.
In another embodiment, the first heat exchanger 313 is filled with a refrigerant, and the first heat exchanger 313 is connected to a refrigeration system, and the first heat exchanger 313 serves as an evaporator of the refrigeration system to provide cooling energy for the material in the intermediate tank 13. By changing the flow direction of the refrigerant, the first heat exchanger 313 can be used as a condenser of the refrigeration system to provide heat for the material in the intermediate tank 13.
Because the pipeline between the premixing system 1 and the foaming system 2 is long, the material will have a certain heat loss when flowing to the foaming machine material tank 21 through the pipeline. Thus, in an embodiment, the temperature detection assembly further comprises a third temperature sensor 303, the third temperature sensor 303 being configured to detect a temperature of an environment in which the premixing system 1 is located; the second temperature range is determined based on the first temperature range and the temperature of the environment in which the premix system 1 is located.
In this embodiment, by combining the first temperature range and the second temperature range determined by the temperature of the environment where the premixing system 1 is located, the temperature flowing to the inlet of the material tank 21 of the foaming machine just meets the first temperature range through the temperature reduction in the pipeline conveying process under the condition that the temperature in the intermediate tank 13 is adjusted to be within the second temperature range, so as to meet the requirement of the foaming system 2 on the material temperature. Therefore, the reliability of the temperature of the material output by the premixing system 1 is improved, and the foaming effect of the foaming system 2 is improved.
In one embodiment, the temperature control system 3 further comprises a first control valve installed on a pipeline between the outlet of the intermediate tank 13 and the inlet of the foaming machine bucket 21; a first circulating pipeline is also arranged between the outlet of the intermediate tank 13 and the inlet of the foaming machine charging bucket 21; when the temperature of the material at the inlet of the foaming machine bucket 21 exceeds the first temperature range, the controller 33 controls the first control valve to be closed and controls the first circulation pipeline to be opened, so that the material between the outlet of the intermediate tank 13 and the inlet of the foaming machine bucket 21 flows back to the intermediate tank 13.
On a pipeline between the outlet of the intermediate tank 13 and the inlet of the foaming machine bucket 21, a first control valve a311 and a first control valve B312 may be provided, the first control valve a311 being located at the outlet of the intermediate tank 13, and the first control valve B312 being located at the inlet of the foaming machine bucket 21. When the material temperature at the inlet of the foaming machine bucket 21 exceeds a first temperature range, the first control valve A311 and the first control valve B312 can be correspondingly controlled to be closed at the same time; or the first control valve A311 is controlled to be closed firstly, and the first control valve B312 is controlled to be closed later.
It should be understood that the first circulation pipeline is provided with a first circulation control valve (not shown), when the first circulation control valve is opened, the first circulation pipeline is opened to return the material flowing to the inlet of the foaming machine material tank 21 to the intermediate tank 13, so as to readjust the temperature of the material, and ensure that the temperature of the material flowing to the foaming machine material tank 21 meets the use requirement. And conversely, when the first circulation control valve is closed, the first circulation pipeline is closed.
Referring to fig. 5, fig. 5 is a flow chart illustrating a temperature control of the foaming system 2 according to an embodiment. In one embodiment, the temperature sensing assembly includes a fourth temperature sensor 304, the fourth temperature sensor 304 is used for sensing the temperature of the material in the foaming machine bucket 21; the temperature adjusting assembly comprises a second temperature adjusting unit 32, and the second temperature adjusting unit 32 is used for adjusting the temperature of the material in the foaming machine bucket 21; the temperature control system 3 further comprises a second control valve 322, and the second control valve 322 is installed on a pipeline between the outlet of the foaming machine bucket 21 and the inlet of the mixing unit 22; when the material temperature of the foaming machine tank 21 is out of the third temperature range, the controller 33 controls the second control valve 322 to close and controls the second temperature adjusting unit 32 to lower or raise the temperature of the material in the foaming machine tank 21 so that the material temperature of the foaming machine tank 21 is within the third temperature range.
In a specific example, the second heat exchanger 323 has a water passage therein; and water with a specific temperature is introduced into the second water through pipeline, so that the temperature of the materials in the foaming machine material is increased or decreased until the temperature of the materials in the foaming machine material is within a third temperature range.
The fourth temperature sensor 304 may be disposed in the foaming machine material tank, or may be disposed to be attached to the outer wall of the foaming machine material tank 21. Here, the second heat exchanger 323 may be supplied with cold or hot water using the above-described water tank 35, a refrigeration system, and a heater. Illustratively, when the temperature of the material in the foaming machine material tank 21 needs to be raised, the water is heated and then is conveyed to the second heat exchanger 323; when the temperature of the material in the expander tank 21 needs to be lowered, the water is refrigerated and then sent to the second heat exchanger 323. The second heat exchanger 323 may have various forms, and may be fixed in the intermediate tank 13 in the form of a coil, for example.
In an embodiment, the temperature detecting assembly comprises a fifth temperature sensor 305, the fifth temperature sensor 305 is configured to detect a temperature of the material at the mixing unit 22; when the temperature of the material at the mixing unit 22 is out of the fourth temperature range, the controller 33 controls the second temperature adjusting unit 32 to lower or raise the temperature of the material in the foaming machine tank 21 so that the temperature of the material flowing to the mixing unit 22 is within the fourth temperature range.
Here, the material temperature at the compounding unit 22 may be the material temperature at the inlet of the compounding unit 22, or at the outlet or inside the compounding unit 22.
Based on the above-mentioned example, the mixing unit 22 mixes the materials a and D, and forms a high molecular polymer by spraying the mixed materials by high pressure. The mixing of the material A and the material D needs to meet a certain temperature condition, otherwise, the foaming cannot be successfully carried out. In this embodiment, the temperature of the material in the cell foamer can 21 should be maintained within the fourth temperature range to meet the foaming requirements. Therefore, when the temperature of the material fed to the expander tank 21 exceeds the upper limit value of the fourth temperature range or is lower than the lower limit value of the fourth temperature range, the second temperature regulating unit 32 is required to readjust the temperature of the material in the expander tank 21.
Because the pipeline between the foaming machine charging bucket 21 and the mixing unit is long, the materials have certain heat loss when flowing to the mixing unit through the pipeline. Therefore, in an embodiment, the temperature detecting assembly further includes a sixth temperature sensor 306, and the sixth temperature sensor 306 is configured to detect the temperature of the environment where the foaming system 2 is located; the third temperature range is determined based on the fourth temperature range and the temperature of the environment in which the foaming system 2 is located.
In this embodiment, by combining the second temperature range and the second temperature range determined by the temperature of the environment where the foaming system 2 is located, the temperature flowing to the inlet of the mixing unit just meets the fourth temperature range through the temperature reduction in the pipeline conveying process under the condition that the temperature in the foaming machine bucket 21 is adjusted to be within the third temperature range, so as to meet the requirement of the mixing unit on material mixing. Therefore, in the embodiment, the accuracy of controlling the temperature of the mixing unit 22 is improved, and the success rate of foaming of the foaming system 2 is improved.
In an embodiment, the second temperature control system 3 further comprises a second control valve 322, the second control valve 322 is installed on a pipeline between the outlet of the foaming machine bucket 21 and the inlet of the mixing unit 22; a second circulation pipeline is also arranged between the outlet of the foaming machine charging bucket 21 and the inlet of the mixing unit 22; when the temperature of the material at the inlet of the mixing unit 22 exceeds the third temperature range, the controller 33 controls the second control valve 322 to close and controls the two-circulation pipeline to open, so that the material between the outlet of the foaming machine tank 21 and the inlet of the mixing unit 22 flows back into the foaming machine tank 21.
Specifically, a second control valve 322A and a second control valve 322B may be disposed on a pipeline between the outlet of the foaming machine bucket 21 and the inlet of the mixing unit 22, the second control valve 322A is located at the outlet of the intermediate tank 13, and the second control valve 322B is located at the inlet of the foaming machine bucket 21. When the material temperature at the inlet of the mixing unit 22 exceeds the fourth temperature range, the second control valve 322A and the second control valve 322B can be correspondingly controlled to be closed at the same time; or the first control valve a311 is controlled to be closed first, and the second control valve 322B is controlled to be closed later.
It should be understood that the second circulation pipeline is provided with a second circulation control valve 321, when the second circulation control valve 321 is opened, the second circulation pipeline is opened to return the material which flows to the inlet of the mixing unit to the foaming machine bucket 21, so as to readjust the temperature of the material, and ensure that the temperature of the material flowing to the mixing unit meets the mixing requirement. Whereas when the second circulation control valve 321 is closed, the second circulation line is closed.
In one embodiment, the foamed sheet production equipment further comprises an upper computer which is communicated with the temperature control system 3; the upper computer is used for storing temperature data detected by all temperature sensors in the temperature detection assembly, and key temperature data in each system can be traced and inquired. The host computer can also be used for in process of production, shows temperature data, provides convenience for the control of site temperature.
In the following examples, examples of the temperature control method of the present application will be explained. It should be understood that the temperature control methods described below can be applied to a variety of production facilities/systems. For ease of understanding, the first system described below may be the premix system in the above embodiment, and the second system may be the foam system in the above embodiment; the first unit may be the foaming machine bucket in the above embodiment and the second unit may be the mixing unit in the above embodiment. The following examples of the temperature control method can be understood with reference to the above-described foamed sheet production apparatus.
Referring to fig. 6, fig. 6 is a flowchart illustrating a temperature control method according to an embodiment. In one embodiment, a method of temperature control, comprises:
s41, acquiring the detection temperature of the material in the first system and the material in the second system; wherein the first system is used for conveying materials into the second system;
and S42, adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature, so that the temperature of the material output by the second system is within a preset temperature range.
In one embodiment, the step of obtaining the detected temperatures of the material in the first system and the material in the second system S41 includes:
acquiring the material temperature at the inlet of the second system;
s42, adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature, comprising:
when the temperature of the material at the inlet of the second system is outside a first temperature range, the temperature of the material in the first system is reduced or increased so that the temperature of the material flowing to the inlet of the second system is within the first temperature range.
In one embodiment, the reducing or increasing the temperature of the material in the first system when the temperature of the material at the inlet of the second system is outside a first temperature range to bring the temperature of the material flowing to the inlet of the second system within the first temperature range comprises:
acquiring the temperature of a material in a first system;
increasing or decreasing the temperature of the material within the first system until the temperature of the material in the first system is in a second temperature range.
In an embodiment, the method further comprises:
acquiring the ambient temperature of the first system;
and determining the second temperature range according to the first temperature range and the temperature of the environment where the first system is located.
In one embodiment, the obtaining the detected temperatures of the material in the first system and the material in the second system at S41 includes:
detecting a temperature of the material in the second system;
s42, adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature, comprising:
when the temperature of the material in the second system exceeds a third temperature range, the temperature of the material in the second system is reduced or increased so that the temperature of the material in the second system is within the third temperature range.
In one embodiment, the second system comprises a first unit and a second unit, the first unit being located between the first system and the second unit; the method further comprises the following steps:
acquiring the material temperature at the inlet of the second unit;
when the temperature of the material at the second unit is outside a fourth temperature range, adjusting the temperature of the material in the first unit so that the temperature of the material flowing to the second unit is within the fourth temperature range.
According to the temperature control method, the detected temperatures of the materials in the first system and the materials in the second system are obtained; and according to the detected temperature, the material temperature in the first system and/or the material temperature in the second system are/is adjusted, so that the first system and the second system have the automatic temperature adjusting function, the reliability of temperature control is improved, and the unreliability brought by manual temperature control is avoided.
While the present application has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.
Claims (14)
1. A method of temperature control, comprising:
acquiring the detection temperatures of the material in the first system and the material in the second system; wherein the first system is used for conveying materials into the second system;
and adjusting the temperature of the material in the first system and/or the temperature of the material in the second system according to the detected temperature so as to enable the temperature of the material output by the second system to be within a preset temperature range.
2. The method of claim 1, wherein obtaining the sensed temperatures of the material in the first system and the material in the second system comprises:
acquiring the material temperature at the inlet of the second system;
said adjusting the temperature of the material in the first system and/or the temperature of the material in the second system in dependence on the detected temperature comprises:
when the temperature of the material at the inlet of the second system is outside a first temperature range, the temperature of the material in the first system is reduced or increased so that the temperature of the material flowing to the inlet of the second system is within the first temperature range.
3. The method of claim 2, wherein the reducing or increasing the temperature of the material in the first system when the temperature of the material at the inlet of the second system is outside a first temperature range to bring the temperature of the material flowing to the inlet of the second system within the first temperature range comprises:
acquiring the temperature of a material in a first system;
increasing or decreasing the temperature of the material within the first system until the temperature of the material in the first system is in a second temperature range.
4. The method of claim 3, further comprising:
acquiring the ambient temperature of the first system;
and determining the second temperature range according to the first temperature range and the temperature of the environment where the first system is located.
5. The method of claim 1, wherein obtaining the sensed temperatures of the material in the first system and the material in the second system comprises:
detecting a temperature of the material in the second system;
said adjusting the temperature of the material in the first system and/or the temperature of the material in the second system in dependence on the detected temperature comprises:
when the temperature of the material in the second system exceeds a third temperature range, the temperature of the material in the second system is reduced or increased so that the temperature of the material in the second system is within the third temperature range.
6. The method of claim 1, wherein the second system comprises a first unit and a second unit, the first unit being located between the first system and the second unit; the method further comprises the following steps:
acquiring the material temperature at the inlet of the second unit;
when the temperature of the material at the second unit is outside a fourth temperature range, adjusting the temperature of the material in the first unit so that the temperature of the material flowing to the second unit is within the fourth temperature range.
7. A foamed sheet production apparatus, characterized by comprising:
a premix system comprising a plurality of intermediate tanks for storing the material; wherein a plurality of said intermediate tanks are used for storing different materials;
the foaming system comprises a plurality of foaming machine charging tanks and a material mixing unit communicated with the plurality of foaming machine charging tanks, and the plurality of foaming machine charging tanks are communicated with the plurality of intermediate tanks in a one-to-one correspondence manner so as to correspondingly receive materials flowing out of the intermediate tanks; the material mixing unit is used for receiving and mixing the materials output by the plurality of foaming machine charging buckets and spraying the foaming materials;
the temperature control system comprises a controller, a temperature detection assembly and a temperature adjusting assembly, wherein the temperature detection assembly and the temperature adjusting assembly are electrically connected with the controller, the temperature detection assembly is used for collecting the temperature of materials in the premixing system and the foaming system, and the controller controls the temperature adjusting assembly to adjust the temperature of the materials in the premixing system and/or the foaming system according to the sampling result of the temperature detection assembly so that the temperature of the mixing assembly is within a preset temperature range;
and the press system is used for receiving the foaming material sprayed out by the material mixing unit and pressing the foaming material to form a plate.
8. The foamed sheet production apparatus according to claim 7, wherein the temperature detection assembly comprises a first temperature sensor for detecting the temperature of the material at the inlet of the material tank of the foaming machine; the temperature adjusting assembly comprises a first temperature adjusting unit, and the first temperature adjusting unit is used for adjusting the temperature of the materials in the premixing system;
when the temperature of the material at the inlet of the foaming machine tank exceeds a first temperature range, the controller controls the first temperature adjusting unit to lower or raise the temperature of the material in the premixing system so that the temperature of the material flowing to the inlet of the foaming machine tank is within the first temperature range.
9. The foamed sheet production apparatus according to claim 8, wherein the temperature detection assembly further comprises a second temperature sensor for detecting a temperature of the material in the intermediate tank;
the first temperature adjustment unit includes a first heat exchanger disposed in the intermediate tank; and correspondingly increasing or decreasing the temperature of the material in the intermediate tank by enabling the first heat exchanger to release heat or absorb heat to the material in the intermediate tank until the temperature of the material in the intermediate tank is in a second temperature range.
10. The foamed sheet production apparatus according to claim 8, wherein the temperature control system further comprises a first control valve installed on a pipeline between the outlet of the tundish and the inlet of the foaming machine bucket; a first circulating pipeline is also arranged between the outlet of the intermediate tank and the inlet of the material tank of the foaming machine;
when the material temperature at the inlet of the foaming machine charging bucket exceeds the first temperature range, the controller controls the first control valve to be closed and controls the first circulating pipeline to be opened so as to enable the material between the outlet of the intermediate tank and the inlet of the foaming machine charging bucket to flow back to the intermediate tank.
11. The foamed sheet production apparatus according to claim 7, wherein the temperature detection assembly includes a fourth temperature sensor for detecting a material temperature in the foaming machine material tank; the temperature adjusting assembly comprises a second temperature adjusting unit, and the second temperature adjusting unit is used for adjusting the temperature of the material in the material tank of the foaming machine;
the temperature control system also comprises a second control valve, and the second control valve is arranged on a pipeline between the outlet of the material tank of the foaming machine and the inlet of the material mixing unit;
when the material temperature of the foaming machine material tank exceeds a third temperature range, the controller controls the second control valve to be closed and controls the second temperature adjusting unit to reduce or raise the temperature of the material in the foaming machine material tank so as to enable the material temperature of the foaming machine material tank to be within the third temperature range.
12. The foamed sheet production apparatus according to claim 11, wherein the temperature detection assembly includes a fifth temperature sensor for detecting a temperature of the material at the mixing unit;
when the temperature of the material at the mixing unit exceeds a fourth temperature range, the controller controls the second temperature adjusting unit to reduce or increase the temperature of the material in the material tank of the foaming machine, so that the temperature of the material flowing to the mixing unit is within the fourth temperature range.
13. The foamed sheet production apparatus according to claim 12, further comprising a second circulation line between the outlet of the foaming machine bucket and the inlet of the mixing unit;
and when the material temperature at the inlet of the mixing unit exceeds a fourth temperature range, the controller controls the second circulation pipeline to be opened so as to enable the material between the outlet of the foaming machine charging bucket and the inlet of the mixing unit to flow back to the foaming machine charging bucket.
14. The foamed sheet production apparatus of claim 7, further comprising an upper computer in communication with the temperature control system;
the upper computer is used for storing the temperature data detected by the temperature detection assembly and displaying the temperature data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110367870.2A CN112947633A (en) | 2021-04-06 | 2021-04-06 | Temperature control method and foamed sheet production equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110367870.2A CN112947633A (en) | 2021-04-06 | 2021-04-06 | Temperature control method and foamed sheet production equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203485360U (en) * | 2013-09-04 | 2014-03-19 | 陕西荣昕石油工程技术有限公司 | Foaming system used in production of polyurethane foam heat-preserving pipe |
| CN205148664U (en) * | 2015-12-04 | 2016-04-13 | 山东博拓塑业股份有限公司 | PVC foaming board production line is with automatic compounding device of joining in marriage |
| KR101960422B1 (en) * | 2018-10-11 | 2019-03-20 | 최원영 | System for producing urethane foam |
| CN110561676A (en) * | 2019-09-18 | 2019-12-13 | 北京李尔岱摩斯汽车系统有限公司 | automatic detection system of foaming equipment |
| CN111688098A (en) * | 2020-07-07 | 2020-09-22 | 大连开元管道有限公司 | Super-large filling volume high-pressure foaming unit |
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2021
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203485360U (en) * | 2013-09-04 | 2014-03-19 | 陕西荣昕石油工程技术有限公司 | Foaming system used in production of polyurethane foam heat-preserving pipe |
| CN205148664U (en) * | 2015-12-04 | 2016-04-13 | 山东博拓塑业股份有限公司 | PVC foaming board production line is with automatic compounding device of joining in marriage |
| KR101960422B1 (en) * | 2018-10-11 | 2019-03-20 | 최원영 | System for producing urethane foam |
| CN110561676A (en) * | 2019-09-18 | 2019-12-13 | 北京李尔岱摩斯汽车系统有限公司 | automatic detection system of foaming equipment |
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