CN110963679A - Cooling system and method for rapidly cooling 3D curved surface hot-bent glass - Google Patents
Cooling system and method for rapidly cooling 3D curved surface hot-bent glass Download PDFInfo
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- CN110963679A CN110963679A CN201911270348.1A CN201911270348A CN110963679A CN 110963679 A CN110963679 A CN 110963679A CN 201911270348 A CN201911270348 A CN 201911270348A CN 110963679 A CN110963679 A CN 110963679A
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- 238000001816 cooling Methods 0.000 title claims abstract description 204
- 239000011521 glass Substances 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000005457 ice water Substances 0.000 claims abstract description 142
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 128
- 238000013003 hot bending Methods 0.000 claims abstract description 52
- 238000010438 heat treatment Methods 0.000 claims abstract description 47
- 239000000498 cooling water Substances 0.000 claims description 133
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 229910002804 graphite Inorganic materials 0.000 claims description 28
- 239000010439 graphite Substances 0.000 claims description 28
- 238000010992 reflux Methods 0.000 claims description 12
- 230000006698 induction Effects 0.000 claims description 9
- 238000000137 annealing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 4
- 235000020679 tap water Nutrition 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 230000005674 electromagnetic induction Effects 0.000 abstract description 12
- 230000006978 adaptation Effects 0.000 abstract description 2
- 238000010304 firing Methods 0.000 abstract description 2
- 238000007493 shaping process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0305—Press-bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Induction Heating (AREA)
Abstract
The invention discloses a cooling system and a cooling method for rapidly cooling 3D curved-surface hot-bent glass. The cooling system is used for cooling 3D curved-surface hot bending glass and protecting hot bending equipment, and comprises an ice water cooling line (1), a cold water cooling line (2) and a cooling coil (3); the ice water cooling line (1) and the cold water cooling line (2) are both connected with the cooling coil (3). This cooling system and electromagnetic induction's glass hot-bending heating method perfect adaptation for the high-quality 3D curved surface hot-bending glass that adopts electromagnetic induction non-contact heating to carry out production can obtain quick cooling and stereotype after the hot-bending shaping, avoids curved surface hot-bending glass's excessively soft hot-bending, can effectively protect firing equipment simultaneously. The method of the invention adopts the cooling system to carry out cooling operation, has high cooling speed and effectively improves the hot bending forming production efficiency of the 3D curved glass.
Description
Technical Field
The invention relates to the technical field of glass hot bending, in particular to a cooling system and a cooling method for rapidly cooling 3D curved-surface hot-bent glass.
Background
In recent years, with the coming of 5G communication signals, the use of flexible OLED screens is becoming widespread, and the processing and production of 3D curved glass becomes an important industrial chain for manufacturing mobile phone screens. In the processing production of the 3D curved glass, the 3D curved glass is a big difficulty, the 3D curved glass is mainly limited by equipment productivity, yield, moulds, process control and the like, and the 3D curved glass development speed is limited due to the difficulty of the 3D curved glass in hot bending.
In the traditional 3D curved glass hot bending forming equipment, the heating devices of the equipment heat the graphite mould by means of electric heating tubes, infrared lamp tubes or local high-frequency radiation, so that the hot bending forming of the curved glass is achieved, and the design and the manufacture of the heating devices are key points influencing the production efficiency of the equipment. The electric heating tube has the advantages of low heating speed, complex structure, high failure rate and poor stability; although the heating speed of the infrared lamp tube is high, the temperature is difficult to control, and the radiation temperature is easy to lose, so that the temperature stability is poor; the local high-frequency radiation heating mode needs to consume a large amount of nitrogen to protect the graphite mold, consumes larger electric quantity and has higher cost. And electromagnetic induction can carry out non-contact heating to graphite mold fast, and heating efficiency is high, and the curved glass of heat of production is of high quality.
However, in the curved equipment of current traditional heat, need a plurality of stations to carry out progressively cooling down during the cooling, it is inefficient, and need a plurality of water pipe head to connect main water pipe and cold water board, cause the water pipe head to pile up and arrange densely, equipment is pleasing to the eye, and installation and debugging are troublesome. Moreover, the existing traditional hot bending equipment needs to adopt a large amount of cooling water for cooling when cooling, and the interface is easy to block when the water channels are too much, so that the water explosion pipe is easy to cause.
Therefore, from the consideration of production process and cost, the current cooling mode can not meet the requirement of rapid cooling of electromagnetic induction heating hot bending glass, and the current cooling mode greatly influences the production efficiency of the 3D curved surface glass hot bending machine and can not effectively meet the requirement of the future market.
Disclosure of Invention
The invention aims to provide a cooling system for rapidly cooling 3D curved-surface hot-bent glass, aiming at the defects or shortcomings in the prior art. This cooling system and electromagnetic induction's glass hot-bending heating method perfect adaptation for the high-quality 3D curved surface hot-bending glass that adopts electromagnetic induction non-contact heating to carry out production can obtain quick cooling and stereotype after the hot-bending shaping, avoids curved surface hot-bending glass's excessively soft hot-bending, can effectively protect firing equipment simultaneously.
The invention also aims to provide a cooling method for rapidly cooling the 3D curved-surface hot-bent glass by adopting the cooling system.
The purpose of the invention is realized by the following technical scheme.
A cooling system for rapidly cooling 3D curved-surface hot bent glass is used for cooling the 3D curved-surface hot bent glass and protecting hot bent equipment and comprises an ice water cooling line, a cold water cooling line and a cooling coil;
the ice water cooling line comprises an ice water machine and an ice water circulating water path; the ice water machine is provided with an ice water outlet and an ice water return port; the ice water circulating waterway comprises an ice water inlet waterway and an ice water return waterway; one end of the ice water inlet waterway is connected with the ice water outlet, and the other end of the ice water inlet waterway is connected with the water inlet end of the cooling coil; one end of the ice water reflux water channel is connected with the water outlet end of the cooling coil, and the other end of the ice water reflux water channel is connected with the ice water reflux port;
the cooling water cooling line comprises a cooling water tower and a cooling water circulating water path; the cooling water tower is provided with a cooling water outlet and a cooling water return port; the cooling water circulation waterway comprises a cooling water inlet waterway and a cooling water return waterway; one end of the cooling water inlet waterway is connected with the cooling water outlet, the other end of the cooling water inlet waterway is used for being connected with an inlet of a cooling water pipeline on the heating furnace body, and a cooling water inlet shunting pipeline connected with an inlet of the cooling coil is also arranged at the other end of the cooling water inlet waterway; one end of the cooling water backflow water channel is used for being connected with an outlet of a cooling water pipeline on the heating furnace body, the cooling water backflow water channel is further provided with a backflow water diversion pipeline connected with an outlet of the cooling coil, and the other end of the cooling water backflow water channel is connected with the cooling water backflow port.
Preferably, the water chiller comprises a compressor, a condenser, an evaporator and a water storage tank; the inside of the water storage tank is provided with a return water storage chamber and an ice water storage chamber;
one end of the condenser is connected with the return water storage chamber, and a drying filter and an expansion valve are arranged on a connecting pipeline; the other end of the condenser is connected with the inlet end of the compressor; the outlet end of the compressor is connected with the ice water storage chamber; the evaporator is connected with the condenser; the ice water reflux port is formed in the reflux water storage chamber; the ice water outlet is arranged on the ice water storage chamber.
More preferably, the return water storage chamber is further provided with a tap water replenishing port.
Preferably, a booster water pump is further arranged between the ice water outlet and the ice water circulating waterway.
Preferably, the cooling coil is a copper coil wound into turns.
Preferably, the ice water inlet water channel, the ice water return water channel, the cooling water inlet water diversion pipeline and the return water diversion pipeline are all provided with fluid valves.
Preferably, the ice water inlet water channel, the ice water return water channel, the cooling water inlet water channel and the cooling water return water channel are all provided with temperature detectors.
Preferably, the ice water inlet water channel, the ice water return water channel, the cooling water inlet water channel and the cooling water return water channel are all provided with pipe joints.
Preferably, ball valves are arranged on the end part of the ice water inlet water channel connected with the ice water outlet, the end part of the ice water return water channel connected with the ice water return port, the end part of the cooling water inlet water channel connected with the cooling water outlet and the end part of the cooling water return water channel connected with the cooling water return port.
Preferably, a flow meter is arranged on the cooling water inlet waterway.
A method for rapidly cooling 3D curved-surface hot-bending glass, wherein the 3D curved-surface hot-bending glass is subjected to hot-bending heating forming by adopting a variable-frequency induction current heating graphite mold and is cooled by adopting any one of the cooling systems, and the method comprises the following steps:
(1) the plane glass is placed and carried on the graphite mold, and the graphite mold is pushed into the heating furnace body and is positioned in the cooling coil;
(2) introducing cooling water with the temperature of 25 +/-5 ℃ into the cooling coil; vacuumizing, introducing variable frequency current into the cooling coil and generating an induction magnetic field, so that the graphite mold positioned in the cooling coil generates induction current to generate heat;
(3) adjusting the current frequency, and heating to a first temperature point which is 50-100 ℃ lower than the softening point temperature of the glass to soften the glass; in the process of adjusting the first temperature point, keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(4) continuously adjusting the current frequency to reach a second temperature point, and carrying out hot bending forming on the glass; in the process of adjusting the second temperature point, continuously keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(5) then adjusting the current frequency, and cooling to a third temperature point which is 100-200 ℃ lower than the annealing point temperature, so as to anneal the glass; in the process of adjusting the third temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(6) adjusting the current frequency to reach a fourth temperature point, and finishing the annealing of the product; in the process of adjusting the fourth temperature point, cooling water with the temperature of 25 +/-5 ℃ is introduced into the cooling coil;
(7) stopping inputting current to the cooling coil, stopping vacuumizing, and reducing the temperature to a fifth temperature point; in the process of adjusting the fifth temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(8) and opening the heating furnace body, pushing out the graphite mold, and taking down the molded curved glass.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the cooling lines of the cooling system are all connected with the cooling coil, and the cooling coil can be used as a coil for electromagnetic induction non-contact heating, so that the cooling system is perfectly matched with an electromagnetic induction non-contact heating mode, high-quality 3D curved-surface hot-bent glass produced by adopting electromagnetic induction non-contact heating can be rapidly cooled and shaped after hot-bent forming, and excessive softening and hot bending of the curved-surface hot-bent glass are avoided; and the cooling of the cooling coil is non-contact heat absorption cooling, a graphite mold is not required to be contacted, and no influence is caused on the graphite mold.
(2) In the cooling system, the double cooling effect of cooling water and ice water alternately is adopted, so that the temperature of the graphite mold and the curved glass after hot bending forming can be quickly reduced, and the production efficiency is accelerated; and the two cooling lines of the cooling water and the ice water are independent from each other and do not influence each other, and the used water flow is low.
(3) In the cooling system, the cooling effect of cooling water and ice water alternating is adopted, cooling can be rapidly carried out through ice water cooling, a multi-procedure water channel is not used for water inlet and outlet cooling, the installation of the pipe joint is reduced, the equipment is simpler and more attractive, the installation and debugging are easier, and the water consumption is reduced.
(4) In the cooling system, the cooling water and the ice water are alternately used for achieving a double cooling effect, the cooling water and the ice water can be used for injecting water into the cooling coil to prevent breakdown in the non-contact heating process of electromagnetic induction, and the cooling water can be used for cooling and protecting a cavity door plate and the like of the heating furnace body, so that heating equipment can be effectively protected, and the connection and installation of external water pipes are reduced.
(5) In the cooling system, a double cooling effect of cooling water and ice water alternately is adopted, and the cold water cooling line and the ice water cooling line are respectively provided with a pipe joint which can be used for being connected with a circulating cooling water pipeline for cooling the heating furnace body, so that the connection and the installation are convenient, and the requirement of cooling and protecting the parts comprising the heating furnace body can be met.
(6) The cooling method is matched with electromagnetic induction non-contact heating hot bending forming of the 3D curved glass, the hot bending equipment can be effectively protected in real time during hot bending work, and meanwhile, the 3D curved glass can be rapidly cooled and shaped after hot bending forming, so that the production efficiency of the 3D curved glass is improved, and the service life of the hot bending equipment is prolonged.
Drawings
FIG. 1 is a schematic diagram showing the overall structure of a cooling system for rapidly cooling 3D curved hot bent glass according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an ice water machine in an ice water cooling line of the cooling system for rapidly cooling 3D curved hot-bent glass according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an ice water circulation water path in an ice water cooling line of the cooling system for rapidly cooling 3D curved hot-bent glass according to the embodiment of the present invention;
FIG. 4 is a schematic diagram of a cooling tower in a cooling line of a cooling system for rapidly cooling 3D curved hot bent glass according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a cooling water circulation waterway in a cooling water cooling line of the cooling system for rapidly cooling 3D curved hot bent glass according to the embodiment of the present invention;
FIG. 6 is a schematic diagram of a cooling coil of the cooling system for rapidly cooling 3D curved hot bent glass according to the present invention in an exemplary embodiment;
the attached drawings are marked as follows: 1-an ice water cooling line, 11-an ice water machine, 1101-an ice water outlet, 1102-an ice water return port, 1103-a tap water replenishing port, 111-a compressor, 112-a condenser, 113-an evaporator, 114-a water storage tank, 115-a drying filter, 116-an expansion valve, 12-an ice water circulating water path, 121-an ice water inlet water path, 122-an ice water return water path, 13-a booster pump, 14 and 23-a fluid valve, 15 and 24-a temperature detector, 16 and 25-a pipe joint, 17 and 26-a ball valve, 2-a cold water cooling line, 21-a cooling water tower, 2101-a cooling water outlet, 2102-a cooling water return port, 22-a cooling water circulating water path, 221-a cooling water inlet water path, 2211-a cooling water inlet water flow path, 222-cooling water return waterway, 2221-return water shunt pipeline, 27-flowmeter, 3-cooling coil, 301-cooling coil water inlet end, and 302-cooling coil water outlet end.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, but the scope and implementation of the present invention are not limited thereto. In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", and the like are used for distinguishing the description only and for the purpose of facilitating the description of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have the specific order, be constructed in the specific order, and operate, and therefore, should not be construed as limiting the present invention, nor should be construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, a cooling system for rapidly cooling 3D curved hot-bent glass according to the embodiment is shown, and the cooling system is used for cooling the 3D curved hot-bent glass and protecting a hot-bending device. In this embodiment, the cooling system includes an ice water cooling line 1, a cold water cooling line 2, and a cooling coil 3, wherein, when performing the 3D curved glass hot bending molding operation, the graphite mold for holding glass is placed in the cooling coil 3, and the cooling coil 3 is supplied with a variable frequency current to perform electromagnetic induction and heat the graphite mold located therein, so as to heat the glass on the graphite mold, and at this time, the glass is automatically bent and deformed under the vacuum environment and by the gravity action of the upper mold of the graphite mold. The ice water cooling line 1 and the cold water cooling line 2 are both connected with the cooling coil 3, cooling liquid can be provided for the cooling coil 3 after hot bending forming operation and hot bending forming, the cooling coil 3 is prevented from being broken down, and the graphite mold and glass on the graphite mold can be cooled rapidly by adopting a double cooling effect of cooling water and ice water alternately, so that the hot bending production efficiency of 3D curved glass is improved, and the cooling water line 2 can also provide cooling water cooling protection for a heating furnace body for hot bending forming, so that the service life of hot bending equipment is effectively prolonged.
In particular, see fig. 2 and 3. In this embodiment, the ice water cooling line 1 includes an ice water machine 11 and an ice water circulation water path 12. The ice water machine 11 is provided with an ice water outlet 1101 and an ice water return port 1102; the ice water circulation water path 12 includes an ice water inlet water path 121 and an ice water return water path 122. One end of the ice water inlet water path 121 is connected to the ice water outlet 1101, and the other end is connected to the water inlet end of the cooling coil 3; one end of the ice water reflux water channel 122 is connected with the water outlet end of the cooling coil 3, and the other end is connected with the ice water reflux port 1102.
In this embodiment, the ice and water machine 11 includes a compressor 111, a condenser 112, an evaporator 113, and a water storage tank 114; the water tank 114 includes a return water storage chamber (not shown) and an ice water storage chamber (not shown). One end of the condenser 112 is connected to the return water storage chamber, and a drying filter 115 is disposed on the connecting pipeline for filtering impurities; in addition, an expansion valve 116 is disposed on the connection pipeline for throttling and depressurizing, adjusting the flow rate, and protecting the compressor 111 to prevent the compressor 111 from operating in an over-wet or over-hot environment. And the other end of the condenser 112 is connected to an inlet end of the compressor 111. The outlet end of the compressor 111 is connected with the ice water storage chamber, and a bent pipe which is connected with and surrounds the outlet end of the compressor 111 is arranged in the ice water storage chamber to ensure that the outlet water of the ice water storage chamber is ice water reaching the required temperature; the evaporator 113 is connected with the condenser 112, the evaporator 113 can exchange heat with the outside air to perform gasification heat absorption refrigeration, the condenser 112 is internally provided with an annular liquid pipeline, and the liquid in the pipeline can rapidly exchange heat with the air outside the pipe to release heat; the ice water reflux port 1102 is formed in the reflux water storage chamber; the ice water outlet 1101 is formed in the ice water storage chamber.
In addition, a tap water replenishing port 1103 is further formed in the return water storage chamber, so that water can be replenished to the water storage tank 14, and the phenomenon that the capacity of liquid in the water storage tank 14 is insufficient to influence the work of the cooling system is avoided.
In addition, a booster water pump 13 is further arranged between the ice water outlet 1101 and the ice water circulating water path 12, a water inlet end of the booster water pump 13 is communicated with the ice water outlet 1101, and a water outlet of the booster water pump 13 is communicated with a water inlet of the ice water circulating water path 12. The ice water in the water tank 14 can be pumped to the ice water circulation water path 12 by the booster water pump 13 and conveyed to the cooling coil 3 for circulation.
In operation, the compressor 111, the condenser 112 and the evaporator 113 in the ice and water machine 11 are operated, and ice and water are generated by refrigeration and stored in the water storage tank 14. Pumped by a booster pump 13, and conveyed by an ice water circulation water passage 12 to supply ice water to the cooling coil 3 for cooling.
Referring to fig. 4 and 5, in the present embodiment, the cooling water cooling line 2 includes a cooling water tower 21 and a cooling water circulation water path 22. The cooling water tower 21 is provided with a cooling water outlet 2101 and a cooling water return port 2102; the cooling water circulation water passage 22 includes a cooling water inlet water passage 221 and a cooling water return water passage 222. One end of the cooling water inlet water channel 221 is connected to the cooling water outlet 2101, the other end of the cooling water inlet water channel is used for being connected to an inlet of a cooling water pipeline on the heating furnace body, and a cooling water inlet branch channel 2211 connected to an inlet of the cooling coil 3 is further arranged at the other end of the cooling water inlet water channel; one end of the cooling water return path 222 is used to connect to an outlet of a cooling water line on the heating furnace body, and a return water bypass path 2221 connected to an outlet of the cooling coil 3 is further provided, and the other end of the cooling water return path 222 is connected to the cooling water return port 2102.
In this embodiment, the cooling water inlet flow dividing line 2211 is a flow dividing line formed on the cooling water inlet line 221, and the other end thereof is connected to the ice water inlet line 121 in a lap joint manner, i.e., shares a water inlet pipe with the ice water inlet line 121, so that the cooling water inlet line 221 is connected to the inlet of the cooling coil 3; the cooling water return water path 222 is an inflow water path opened on the cooling water return water path 222, and the other end of the cooling water return water path is overlapped with the ice water return water path 122, that is, the cooling water return water path and the ice water return water path 122 share an outlet water channel.
Referring to fig. 3 and 5, fluid valves (14, 23) are disposed on the ice water inlet path 121, the ice water return path 122, the cooling water inlet branch path 2211, and the return water branch path 2221. Temperature detectors (15, 24) are disposed on the ice water inlet water path 121, the ice water return water path 122, the cooling water inlet water path 221, and the cooling water return water path 222, respectively, and are used for monitoring the water temperature.
In addition, pipe joints (16, 25) are arranged on the ice water inlet water channel 121, the ice water return water channel 122, the cooling water inlet water channel 221 and the cooling water return water channel 222, the pipe joints (16, 25) on the ice water inlet water channel 121 and the cooling water inlet water channel 221 are arranged at the water outlet end, and the pipe joints (16, 25) on the ice water return water channel 122 and the cooling water return water channel 222 are arranged at the water inlet end, so that circulating cooling water pipelines comprising parts needing cooling on the heating furnace body can be conveniently butted, and the requirements of cooling and protecting the parts comprising the heating furnace body can be met.
Ball valves (17, 26) are arranged on the end part of the ice water inlet water channel 121 connected with the ice water outlet 1101, the end part of the ice water return water channel 122 connected with the ice water return port 1102, the end part of the cooling water inlet water channel 221 connected with the cooling water outlet 2101 and the end part of the cooling water return water channel 222 connected with the cooling water return port 2102, and are used for being manually opened and closed to realize the on-off of water flow.
The cooling water inlet water channel 221 is provided with a flow meter 27 for monitoring the water flow on the cooling water inlet water channel 221, preventing the water flow from being insufficient and ensuring the cooling efficiency.
Referring to fig. 6, in the present embodiment, the cooling coil 3 is a copper coil wound around a circle, and in the further hot bending process, a variable frequency current may be applied to the copper coil to induce a graphite mold to form an induced current, so as to perform hot bending of the 3D curved glass. Furthermore, one end of the cooling coil 3 is a water inlet end 301, and the other end is a water outlet end 302.
Example 2
A method for rapidly cooling 3D curved-surface hot-bending glass is provided, wherein the 3D curved-surface hot-bending glass is subjected to hot-bending heating forming by adopting a variable-frequency induction current heating graphite mold, and is cooled by adopting the cooling system of embodiment 1, and the method comprises the following steps:
(1) the plane glass is placed and carried on the graphite mold, and the graphite mold is pushed into the heating furnace body and is positioned in the cooling coil;
(2) introducing cooling water with the temperature of 25 +/-5 ℃ into the cooling coil; vacuumizing, introducing variable frequency current into the cooling coil and generating an induction magnetic field, so that the graphite mold positioned in the cooling coil generates induction current to generate heat;
(3) adjusting the current frequency, and heating to a first temperature point which is 50-100 ℃ lower than the softening point temperature of the glass to soften the glass; the first temperature point is controlled to be 700-800 ℃, and the time for adjusting the first temperature point is controlled to be 30-40 s; in the process of adjusting the first temperature point, keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(4) continuously adjusting the current frequency to reach a second temperature point, and performing hot bending on the glass; the second temperature point is controlled to be 750-900 ℃, and the time for adjusting the second temperature point is controlled to be 10-20 s; in the process of adjusting the second temperature point, continuously keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(5) then adjusting the current frequency, and cooling to a third temperature point which is 100-200 ℃ lower than the annealing point temperature, so as to anneal the glass; the third temperature point is controlled to be 200-300 ℃, and the time for adjusting the third temperature point is controlled to be 30-40 s; in the process of adjusting the third temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(6) adjusting the current frequency to reach a fourth temperature point, and finishing the annealing of the product; the fourth temperature point is controlled to be 300-400 ℃, and the time for adjusting the fourth temperature point is controlled to be 20-30 s; in the process of adjusting the fourth temperature point, cooling water with the temperature of 25 +/-5 ℃ is introduced into the cooling coil;
(7) stopping inputting current to the cooling coil, stopping vacuumizing, and reducing the temperature to a fifth temperature point; the fifth temperature point is controlled to be room temperature; in the process of adjusting the fifth temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(8) and opening the heating furnace body, pushing out the graphite mold, and taking down the molded curved glass.
In the cooling method, the cooling process and the hot bending operation are carried out simultaneously, and the cooling coil 3 and the heating furnace body are effectively protected in real time during the hot bending operation, so that the service life of hot bending equipment is prolonged; and cooling water and ice water are alternately or simultaneously used for cooling different parts according to different heating requirements. Moreover, after hot bending forming, 3D curved glass can be rapidly cooled and shaped, and the production efficiency of the 3D curved glass is improved.
The above embodiments are merely preferred embodiments of the present invention, and the technical solutions of the present invention are described in further detail, but the scope and implementation of the present invention are not limited thereto, and any changes, combinations, deletions, substitutions or modifications that do not depart from the spirit and principle of the present invention are included in the scope of the present invention.
Claims (9)
1. A cooling system for rapidly cooling 3D curved-surface hot-bent glass is used for cooling the 3D curved-surface hot-bent glass and protecting hot-bent equipment, and is characterized by comprising an ice water cooling line (1), a cold water cooling line (2) and a cooling coil (3);
the ice water cooling line (1) comprises an ice water machine (11) and an ice water circulating waterway (12); the ice water machine (11) is provided with an ice water outlet (1101) and an ice water return port (1102); the ice water circulating water path (12) comprises an ice water inlet water path (121) and an ice water return water path (122); one end of the ice water inlet water channel (121) is connected with the ice water outlet (1101), and the other end of the ice water inlet water channel is connected with the water inlet end of the cooling coil (3); one end of the ice water reflux water channel (122) is connected with the water outlet end of the cooling coil (3), and the other end of the ice water reflux water channel is connected with the ice water reflux port (1102);
the cooling water cooling line (2) comprises a cooling water tower (21) and a cooling water circulating water channel (22); the cooling water tower (21) is provided with a cooling water outlet (2101) and a cooling water return port (2102); the cooling water circulation water path (22) comprises a cooling water inlet water path (221) and a cooling water return water path (222); one end of the cooling water inlet water channel (221) is connected with the cooling water outlet (2101), the other end of the cooling water inlet water channel is used for being connected with an inlet of a cooling water pipeline on the heating furnace body, and a cooling water inlet water splitting pipeline (2211) connected with an inlet of the cooling coil (3) is further arranged at the other end of the cooling water inlet water channel; one end of the cooling water return water channel (222) is used for being connected with an outlet of a cooling water pipeline on the heating furnace body, a return water branch pipeline (2221) connected with an outlet of the cooling coil (3) is further arranged, and the other end of the cooling water return water channel (222) is connected with the cooling water return port (2102).
2. The cooling system for rapidly cooling 3D curved hot bent glass according to claim 1, wherein the water chiller (11) comprises a compressor (111), a condenser (112), an evaporator (113) and a water storage tank (114); the water storage tank (114) is internally provided with a return water storage chamber and an ice water storage chamber;
one end of the condenser (112) is connected with the return water storage chamber, and a drying filter (115) and an expansion valve (116) are arranged on a connecting pipeline; the other end of the condenser (112) is connected with the inlet end of the compressor (111); the outlet end of the compressor (111) is connected with the ice water storage chamber; the evaporator (113) is connected with the condenser (112); the ice water backflow port (1102) is formed in the backflow water storage chamber; the ice water outlet (1101) is formed in the ice water storage chamber.
3. The cooling system for rapidly cooling 3D curved hot bent glass according to claim 2, wherein the return water storage chamber is further provided with a tap water replenishing port (1103).
4. The cooling system for rapidly cooling 3D curved-surface hot bent glass according to any one of claims 1 to 3, wherein a booster pump (13) is further arranged between the ice water outlet (1101) and the ice water circulating water channel (12).
5. A cooling system for rapidly cooling 3D curved hot bent glass according to claim 1, characterized in that the cooling coil (3) is a copper coil wound into turns.
6. The cooling system for rapidly cooling 3D curved-surface hot bent glass according to claim 1, wherein fluid valves (14, 23) are arranged on the ice water inlet water path (121), the ice water return water path (122), the cooling water inlet water diversion pipeline (2211) and the return water diversion pipeline (2221); temperature detectors (15, 24) are arranged on the ice water inlet water path (121), the ice water return water path (122), the cooling water inlet water path (221) and the cooling water return water path (222); and pipe joints (16, 25) are arranged on the ice water inlet water channel (121), the ice water return water channel (122), the cooling water inlet water channel (221) and the cooling water return water channel (222).
7. The cooling system for rapidly cooling 3D curved-surface hot bent glass according to claim 1, wherein ball valves (17, 26) are arranged on the end part of the ice water inlet water channel (121) connected with the ice water outlet (1101), the end part of the ice water return water channel (122) connected with the ice water return port (1102), the end part of the cooling water inlet water channel (221) connected with the cooling water outlet (2101) and the end part of the cooling water return water channel (222) connected with the cooling water return port (2102).
8. The cooling system for rapidly cooling 3D curved-surface hot bent glass according to claim 1, wherein a flow meter (27) is arranged on the cooling water inlet water channel (221).
9. A method for rapidly cooling 3D curved-surface hot-bending glass, wherein the 3D curved-surface hot-bending glass is subjected to hot-bending heating forming by adopting a variable-frequency induction current heating graphite mold, and is characterized in that the cooling system of any one of claims 1 to 8 is adopted for cooling, and the method comprises the following steps:
(1) the plane glass is placed and carried on the graphite mold, and the graphite mold is pushed into the heating furnace body and is positioned in the cooling coil;
(2) introducing cooling water with the temperature of 25 +/-5 ℃ into the cooling coil; vacuumizing, introducing variable frequency current into the cooling coil and generating an induction magnetic field, so that the graphite mold positioned in the cooling coil generates induction current to generate heat;
(3) adjusting the current frequency, and heating to a first temperature point which is 50-100 ℃ lower than the softening point temperature of the glass to soften the glass; in the process of adjusting the first temperature point, keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(4) continuously adjusting the current frequency to reach a second temperature point, and carrying out hot bending forming on the glass; in the process of adjusting the second temperature point, continuously keeping the cooling coil filled with cooling water at 25 +/-5 ℃;
(5) then adjusting the current frequency, and cooling to a third temperature point which is 100-200 ℃ lower than the annealing point temperature, so as to anneal the glass; in the process of adjusting the third temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(6) adjusting the current frequency to reach a fourth temperature point, and finishing the annealing of the product; in the process of adjusting the fourth temperature point, cooling water with the temperature of 25 +/-5 ℃ is introduced into the cooling coil;
(7) stopping inputting current to the cooling coil, stopping vacuumizing, and reducing the temperature to a fifth temperature point; in the process of adjusting the fifth temperature point, introducing ice water with the temperature of minus 22 +/-5 ℃ into the cooling coil;
(8) and opening the heating furnace body, pushing out the graphite mold, and taking down the molded curved glass.
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