CN112808976B - A method for casting and wrapping a multi-channel copper coil with aluminum liquid and a special casting device thereof - Google Patents
A method for casting and wrapping a multi-channel copper coil with aluminum liquid and a special casting device thereof Download PDFInfo
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- CN112808976B CN112808976B CN202110152269.1A CN202110152269A CN112808976B CN 112808976 B CN112808976 B CN 112808976B CN 202110152269 A CN202110152269 A CN 202110152269A CN 112808976 B CN112808976 B CN 112808976B
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- 239000010949 copper Substances 0.000 title claims abstract description 131
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 130
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 76
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000005266 casting Methods 0.000 title claims abstract description 76
- 239000007788 liquid Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000007872 degassing Methods 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002893 slag Substances 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 6
- 238000005282 brightening Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 abstract description 5
- 230000008018 melting Effects 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 238000001816 cooling Methods 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 8
- 239000001257 hydrogen Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 150000002431 hydrogen Chemical class 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 241000669298 Pseudaulacaspis pentagona Species 0.000 description 1
- 241000519995 Stachys sylvatica Species 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- WPPDFTBPZNZZRP-UHFFFAOYSA-N aluminum copper Chemical compound [Al].[Cu] WPPDFTBPZNZZRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 description 1
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 description 1
- 229940112669 cuprous oxide Drugs 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010862 gear shaping Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明公开了一种铝液浇铸包裹多路铜盘管的方法及其专用浇铸装置；属于铜管蒸发器技术领域；该方法包括下述步骤：(1)将预制好的铜盘管装入浇铸模具中，将浇铸模具外侧的铜盘管其中一端接头连接高压水源，高压水源输出管内的水压不小于1.3MPa，备用；(2)将铝材熔炼成铝液，备用；(3)启动高压水源并保持高压水的输出，当铜盘管另一端有高压水流出时，将熔炼好的铝液浇入浇铸模具中，铜盘管内的高压水瞬间气化并喷出，当铜盘管内输出的水由高压蒸气变为高压液态水时，浇铸完成；本发明旨在提供一种工艺科学、操作简便且效率高的铝液浇铸包裹多路铜盘管的方法及其专用浇铸装置；用于铝液浇铸铜盘管。
The invention discloses a method for casting and wrapping a multi-channel copper coil with aluminum liquid and a special casting device thereof; the method belongs to the technical field of copper tube evaporators; the method comprises the following steps: (1) placing a prefabricated copper coil into a casting mold, connecting one end joint of the copper coil outside the casting mold to a high-pressure water source, the water pressure in the output pipe of the high-pressure water source being not less than 1.3 MPa, and the method is kept in standby mode; (2) melting aluminum material into aluminum liquid, and the method is kept in standby mode; (3) starting the high-pressure water source and maintaining the output of the high-pressure water, when high-pressure water flows out from the other end of the copper coil, pouring the melted aluminum liquid into the casting mold, the high-pressure water in the copper coil is instantly vaporized and sprayed out, and when the water output from the copper coil changes from high-pressure steam to high-pressure liquid water, the casting is completed; the invention aims to provide a method for casting and wrapping a multi-channel copper coil with aluminum liquid and a special casting device thereof with scientific process, simple operation and high efficiency; the method is used for casting copper coils with aluminum liquid.
Description
Technical Field
The invention relates to a casting process, in particular to a method for casting and wrapping a plurality of copper coils by using molten aluminum. The invention also relates to a special casting device based on the method.
Background
The existing copper-aluminum composite technology mainly comprises brazing, surface mounting and screw locking, copper plugging and copper embedding, forging technology (cold forging) and gear shaping CRIMPED FIN technology. The hot casting technology is not adopted, because when the copper pipe is cast by the aluminum liquid at 660-720 ℃, the copper pipe is broken due to hydrogen diseases when the internal and surface of the copper pipe are more than or equal to 370 ℃, and the casting cannot be successfully performed.
When copper is heated (not less than 370 ℃) in a reducing atmosphere containing hydrogen or carbon monoxide, hydrogen H 2 or carbon monoxide CO easily reacts with cuprous oxide (Cu 2 O) at a grain boundary to generate high-pressure steam or carbon dioxide gas, and the copper can be broken. This phenomenon is often referred to as "hydrogen disease" of copper.
Disclosure of Invention
The invention aims at overcoming the defects of the prior art, and provides a method for casting and wrapping a plurality of copper coils by using molten aluminum, which is scientific in process, simple and convenient to operate and high in efficiency.
The latter aim of the present invention is to provide a special casting device based on the above method.
The former technical scheme of the invention is realized by a method for casting and wrapping a plurality of copper coils by aluminum liquid, which comprises the following steps:
(1) Filling the prefabricated copper coil into a casting mold, connecting one end joint of the copper coil outside the casting mold with a high-pressure water source, and keeping the water pressure in an output pipe of the high-pressure water source at least 1.3MPa for later use;
(2) Smelting aluminum material into aluminum liquid for later use;
(3) And starting a high-pressure water source and keeping the output of the high-pressure water, pouring molten aluminum into a casting mold when the high-pressure water flows out from the other end of the copper coil, instantly gasifying and spraying the high-pressure water in the copper coil, and finishing casting when the water output in the copper coil is changed from high-pressure steam into high-pressure liquid water.
In the method for casting and wrapping the multipath copper coil by using the aluminum liquid, in the step (1), the copper coil is prefabricated by bending copper coils with various shapes according to the pipe diameter and the pipe number of a required round pipe or special pipe, the adjacent clearance of the copper coils is not less than 5mm, stainless steel or copper joints are brazed at two ends of the copper coils, the copper coils are integrally immersed into oxidation brightening liquid for 1-3 minutes, and the copper coils are obtained after water washing is taken out, heated, dehumidified and air-dried.
In the method for casting and wrapping the multi-path copper coil by the aluminum liquid, in the step (1), when the inner diameter of the copper coil is 1-3mm, the water pressure in the high-pressure water source output pipe is 2-5MPa, the water flow in the copper coil is 200-850ml/min, the smaller the water pressure is, the larger the water flow is, when the inner diameter of the copper coil is 3-6mm, the water pressure in the high-pressure water source output pipe is 1.5-2MPa, the water flow in the copper coil is 850-3650ml/min, the smaller the water pressure is, the larger the water flow is, and when the inner diameter of the copper coil is 6-20mm, the water pressure in the high-pressure water source output pipe is 1.3-1.5MPa, the water flow in the copper coil is 3650-8250ml/min, and the smaller the water pressure is, and the larger the water flow is.
In the method for casting and wrapping the multipath copper coil pipe with the aluminum liquid, in the step (2), the aluminum material is smelted into the aluminum liquid, namely, the smelting furnace is heated, the aluminum material is added into the smelting furnace, the temperature is continuously increased to enable the aluminum material to be molten into the aluminum liquid, when the temperature of the smelting furnace is increased to 660-680 ℃, deslagging and degassing powder of the aluminum liquid are poured into the smelting furnace, the stirring is uniform, the temperature is continuously increased, and when the temperature is increased to 690-720 ℃, aluminum slag is fished out, so that the aluminum liquid is obtained.
In the method for casting and wrapping the multipath copper coil pipe by using the molten aluminum, in the step (3), the molten aluminum is poured into a casting mold for 6-10 seconds.
In the method for casting and wrapping the multipath copper coil by the aluminum liquid, in the step (2), the consumption of slag removal and degassing powder of the aluminum liquid is 0.1-0.4% of the capacity of the aluminum liquid.
The special casting device based on the aluminum liquid casting and wrapping method for the multipath copper coil pipe comprises a casting die, wherein through holes matched with connectors at two ends of the copper coil pipe are formed in the casting die, the outer diameters of the connectors at two ends of the copper coil pipe are matched with the inner diameters of the through holes, fastening nuts are connected to the connectors at the outer sides of the through holes in a threaded mode, the connectors are fixed in the corresponding through holes through the fastening nuts, and the connectors at two ends of the copper coil pipe are connected with an adjustable pressure circulating cooling system through quick connectors respectively.
In the special casting device, the casting die comprises a bottom plate fixed on an external support, a limiting boss matched with the outer contour of a product to be molded is arranged on the bottom plate, a plurality of side plates which are vertically arranged and detachably connected are attached to the outer wall of the limiting boss, and the through hole is formed in one side plate.
In the special casting device, the pressure-adjustable circulating cooling system comprises a condensation recovery tower, an adjustable high-pressure water pump is connected with a water storage chamber at the bottom of the condensation recovery tower in a conducting manner through a connecting pipe, an air inlet end of the condensation recovery tower is connected with a quick connector at one end connector of a copper coil in a conducting manner through an air outlet pipe, and a water outlet end of the adjustable high-pressure water pump is connected with a quick connector at the other end connector of the copper coil in a conducting manner through a water inlet pipe.
In the special casting device, the water thermometer is arranged on the connecting pipe, the steam thermometer is arranged on the air outlet pipe, and the glass rotor flow regulator and the pressure gauge are sequentially arranged on the water inlet pipe along the water flow direction.
After the process and the special device are adopted, the technology for solving the problem of cracking caused by 'hydrogen disease' when the copper pipe is cast by the aluminum liquid in a water-cooling way is adopted to manufacture finished products, and the technology is widely used for the most efficient and rapid heat absorption, heat release and heat exchange equipment, metalology and metal process which are needed by industry, electronics industry and civil use, and has the advantages of quick cooling period, simplicity, low cost, environmental protection, energy saving, long service life and the like.
Drawings
The invention is described in further detail below in connection with the embodiments in the drawings, but is not to be construed as limiting the invention in any way.
FIG. 1 is a schematic view of the structure of the device of the present invention;
FIG. 2 is a schematic side view of a casting mold;
fig. 3 is a schematic top view of the casting mold.
The device comprises a casting mould, a 1a, a bottom plate, a 1b, a limit boss, a 1c, a side plate, a2, a through hole, a3, a fastening nut, a 4, a quick connector, a 5, an adjustable pressure circulating cooling system, a 5a, a condensation recovery tower, a 5b, a connecting pipe, a 5c, an adjustable high-pressure water pump, a 5d, an air outlet pipe, a 5e, a water inlet pipe, a 6, a water thermometer, a 7, a steam thermometer, an 8, a glass rotor flow regulator, a 9 and a pressure gauge.
Detailed Description
The invention discloses a method for casting and wrapping a multipath copper coil by using aluminum liquid, which comprises the following steps:
(1) And bending copper coils with various shapes according to the pipe diameters and the pipe numbers of the required round pipes or special pipes, wherein the adjacent clearance of the copper coils is not less than 5mm, and brazing stainless steel or copper joints at two ends of the copper coils. The caliber of the braze welding joint is required to be larger than or equal to that of the inlet, otherwise, excessive internal pressure can occur, so that instantaneous water shortage and temperature rise are caused, and hydrogen diseases occur to cause the cracking of the copper pipe.
After brazing, the whole is immersed in the oxidation brightening liquid for 1-3 minutes, and the oxidation brightening liquid is used for removing the oxide remained on the surface of the copper pipe, so that the heat conductivity coefficient (401W/MK) of the welded joint of the copper pipe and the surface of the copper pipe is optimal. After soaking, taking out and washing, heating, dehumidifying and air-drying, so as to avoid the phenomenon that steam is generated during casting to cause gaps between the surface of the copper pipe and the aluminum liquid, and obtain the copper coil.
The prefabricated copper coil is arranged in a casting mould, one end of the copper coil outside the casting mould is connected with a high-pressure water source, when the inner diameter of the copper coil is 1-3mm, the water pressure in an output pipe of the high-pressure water source is 2-5MPa, the water flow in the copper coil is 200-850ml/min, the smaller the water pressure is, the larger the water flow is, when the lower limit value of the water pressure is taken out, the water flow is the upper limit value, when the inner diameter of the copper coil is 3-6mm, the water pressure in the output pipe of the high-pressure water source is 1.5-2MPa, the water flow in the copper coil is 850-3650ml/min, the smaller the water pressure is, the larger the water flow is, when the lower limit value of the water pressure is taken out, the upper limit value of the water flow is taken out, when the water pressure is 6-20mm, the water flow in the copper coil is 3650-8250ml/min, and when the lower limit value of the water pressure is taken out, the upper limit value of the water flow is kept.
(2) Heating the melting furnace, adding the aluminum material into the melting furnace, continuously heating to melt the aluminum material into aluminum liquid, pouring slag and degassing powder of the aluminum liquid into the melting furnace when the temperature of the melting furnace is increased to 660-680 ℃, stirring uniformly, continuously heating, and fishing out the aluminum slag when the temperature is increased to 690-720 ℃ to obtain the aluminum liquid. The consumption of the slag removing and degassing powder of the aluminum liquid is 0.1-0.4% of the capacity of the aluminum liquid. The aluminum liquid deslagging and degassing powder is the prior art, and the conventional aluminum liquid deslagging and degassing powder can be adopted, and is not described herein. The slag removal and degassing powder of the aluminum liquid has the functions of separating and removing residues and part of hydrogen H 2 in the aluminum liquid, improving the purity of the aluminum liquid, enabling the surface of the cast finished product aluminum product to be smooth, free of pores, white spots and scales, and achieving the best specific heat capacity coefficient (0.88 x 103J/KG ℃).
(3) And starting a high-pressure water source and keeping the output of the high-pressure water, when the high-pressure water flows out from the other end of the copper coil, pouring the smelted aluminum liquid into a casting mould for 6-10 seconds, and instantly gasifying and spraying the high-pressure water in the copper coil, wherein when the water output in the copper coil is changed from high-pressure steam into high-pressure liquid water, the casting is completed.
Referring to fig. 1 to 3, the special casting device based on the method for casting and wrapping the multipath copper coil by using the aluminum liquid comprises a casting die 1, wherein through holes 2 matched with connectors at two ends of the copper coil are formed in the casting die 1, the outer diameters of the connectors at two ends of the copper coil are matched with the inner diameters of the through holes 2, fastening nuts 3 are connected to the connectors at the outer sides of the through holes 2 in a threaded manner, the connectors are fixed in the corresponding through holes 2 through the fastening nuts 3, and the connectors at two ends of the copper coil are respectively connected with a pressure-adjustable circulating cooling system 5 through quick connectors 4.
Preferably, the casting mold 1 comprises a bottom plate 1a fixed on an external support, a limiting boss 1b matched with the outer contour of a product to be molded is arranged on the bottom plate 1a, a plurality of side plates 1c which are vertically arranged and detachably connected are attached to the outer wall of the limiting boss 1b, and the through hole 2 is formed in one side plate 1 c.
The pressure-adjustable circulating cooling system 5 comprises a condensation recovery tower 5a, wherein an adjustable high-pressure water pump 5c is connected to a water storage chamber at the bottom of the condensation recovery tower 5a in a conducting manner through a connecting pipe 5b, the air inlet end of the condensation recovery tower 5a is connected to a quick connector 4 at a connector at one end of a copper coil in a conducting manner through an air outlet pipe 5d, and the water outlet end of the adjustable high-pressure water pump 5c is connected to a quick connector 4 at the connector at the other end of the copper coil in a conducting manner through a water inlet pipe 5 e.
Further, in order to intuitively observe key parameters such as water pressure, water temperature, steam temperature and the like during casting in real time, a water thermometer 6 is arranged on the connecting pipe 5b, a steam thermometer 7 is arranged on the air outlet pipe 5d, and a glass rotor flow regulator 8 and a pressure gauge 9 are sequentially arranged on the water inlet pipe 5e along the water flow direction.
The device of the invention can be used for automatic casting or manual casting. During automatic casting, the related detection components and execution components, such as an adjustable high-pressure water pump, a water thermometer, a steam thermometer, a glass rotor flow regulator and a pressure gauge. It is also obvious to those skilled in the art that the present invention needs to be replaced with a related model which is conventional in the art and can be connected with a control terminal (a PLC or a single chip microcomputer, etc. conventional in the art) to output or receive a signal.
During operation, the copper coil pipe brazing connector is well connected with the casting mold, the connector is connected with the pressure-adjustable circulating cooling system, the system is started, after the water pressure in the copper coil pipe is stable, molten aluminum is injected into the casting mold within 6-10 seconds, high-pressure water flow is rapidly cooled to below 370 ℃ when passing through the inside of the high-temperature copper pipe, so that the high-pressure water flow can not generate hydrogen disease reaction, and the copper pipe is instantly subjected to heat absorption, cooling and protection, so that the copper pipe can not deform, crack and deteriorate, the copper pipe is heated, water in the flow pipe is instantly gasified and enters the condensation recovery tower, and steam is recycled after condensation. When the water storage chamber at the bottom of the condensation recovery tower is insufficient in water quantity, tap water is supplemented through an external pipeline. The whole process realizes zero sewage discharge. When the water at the water outlet is changed into liquid from gasification, the cooling work in the copper pipe is completed, and the copper pipe casting is successfully cast by the aluminum liquid. Through experimental dissection of aluminum-copper castings, the surface of a copper pipe in the aluminum piece is bright like new, the joint of copper and aluminum is seamlessly and fully bonded, and the appearance of the aluminum piece is smooth and regular.
Screening experiments
Four spring-shaped red copper coils with an inner diameter of 1.0mm, an outer diameter of 2.0mm, an inner diameter of 3mm, an outer diameter of 4mm, an inner diameter of 6mm, an outer diameter of 8mm, an inner diameter of 20mm and an outer diameter of 22mm, each copper coil having a length of 1m, were prepared. Screening experiments are carried out on different water pump pressures, different water flow rates in the pipe and different casting aluminum liquid time. The specific experimental results are shown in tables 1 to 4:
TABLE 1 statistical data table of experimental results for copper pipe with 2.0MM outside diameter and 1.0MM inside diameter
As shown in the data of the table, when the pressure is not less than 3.2MPa and the water flow in the copper pipe is not less than 200ml/min, the casting can be successfully performed.
TABLE 2 statistical data table of experimental results of copper pipe with 4MM outer diameter and 3MM inner diameter
As shown in the data of the table, when the pressure is not less than 2.0MPa and the water flow in the copper pipe is not less than 850ml/min, the casting can be successfully performed.
TABLE 3 statistical data table of experimental results for copper pipe with 8MM outside diameter and 6MM inside diameter
As shown in the data of the table, when the pressure is not less than 1.5MPa and the water flow in the copper pipe is not less than 3650ml/min, the casting can be successfully performed.
TABLE 4 statistical data table of experimental results of copper pipe with outer diameter of 22MM and inner diameter of 20MM
As shown in the data of the table, when the pressure is not less than 1.3MPa and the water flow in the copper pipe is not less than 8250ml/min, the casting can be successfully performed.
The above experiments were performed with the flow values at the beginning of the experiment all being fully on the glass rotor flow regulator, i.e. without restriction, in order to find the optimal value.
From the above experimental analysis, it was found that the smaller the inner diameter of the copper tube, the larger the required pressure value was. At the beginning of the experiment, the research and development personnel consider that the smaller the inner diameter of the copper pipe is, the smaller the required water pressure is, and only the water in the copper pipe can flow into the pipe.
In addition, in the experimental process, the research and development personnel consider that the temperature of the steam output in the copper pipe can be lowered as long as the water pressure is large enough, and the copper pipe with all pipe diameters can be commonly used. That is, the higher the water pressure, the better and safer the water pressure, and the higher the success rate. However, according to the experimental data, after the pressure reaches a certain value, the pressure is continuously increased, the temperature of the steam output in the copper pipe is basically unchanged, the final effect of the experiment is not substantially influenced, and only the energy consumption is increased. This is also unexpected to the developer.
The above examples are provided for convenience of description of the present invention and are not to be construed as limiting the invention in any way, and any person skilled in the art will make partial changes or modifications to the invention by using the disclosed technical content without departing from the technical features of the invention.
Claims (5)
1. A method for casting and wrapping a plurality of copper coils by aluminum liquid, which is characterized by comprising the following steps:
(1) The prefabricated copper coil is arranged in a casting mould, one end joint of the copper coil outside the casting mould is connected with a high-pressure water source, wherein the inner diameter of the copper coil is 1mm, the water pressure in an output pipe of the high-pressure water source is not less than 3.2MPa, the water flow in a copper pipe is not less than 200ml/min, or the inner diameter of the copper coil is 3mm, the water pressure in the output pipe of the high-pressure water source is not less than 2MPa, the water flow in the copper pipe is not less than 850ml/min, or the inner diameter of the copper coil is 6mm, the water pressure in the output pipe of the high-pressure water source is not less than 1.5MPa, the water flow in the copper pipe is not less than 3650ml/min, or the inner diameter of the copper coil is 20mm, the water pressure in the output pipe of the high-pressure water source is not less than 1.3MPa, and the water flow in the copper pipe is not less than 8250ml/min;
(2) Smelting aluminum material into aluminum liquid for later use;
(3) And starting a high-pressure water source and keeping the output of the high-pressure water, pouring molten aluminum into a casting mold when the high-pressure water flows out from the other end of the copper coil, instantly gasifying and spraying the high-pressure water in the copper coil, and finishing casting when the water output in the copper coil is changed from high-pressure steam into high-pressure liquid water.
2. The method for casting and wrapping the multipath copper coil by using the aluminum liquid is characterized in that in the step (1), the copper coil is prefabricated by bending copper coils with various shapes according to the pipe diameter and the pipe number of round pipes or special pipes, the adjacent gap of the copper coils is not less than 5mm, stainless steel or copper joints are brazed at two ends of the copper coils, the copper coils are integrally immersed into oxidation brightening liquid for 1-3 minutes, and the copper coils are obtained after water washing is taken out, heated, dehumidified and air-dried.
3. The method for casting and wrapping the multi-channel copper coil pipe by using the aluminum liquid is characterized in that in the step (2), the aluminum material is smelted into the aluminum liquid, namely, a furnace is heated, the aluminum material is added into the furnace, the temperature is continuously increased to enable the aluminum material to be molten into the aluminum liquid, when the temperature of the furnace is increased to 660-680 ℃, slag removal and degassing powder of the aluminum liquid are poured into the furnace, the stirring is uniform, the temperature is continuously increased, and when the temperature is increased to 690-720 ℃, aluminum slag is fished out, so that the aluminum liquid is obtained.
4. The method for casting and wrapping a plurality of copper coils with molten aluminum according to claim 1, wherein in the step (3), the molten aluminum is poured into the casting mold for 6 to 10 seconds.
5. A method of casting and wrapping a multi-path copper coil with aluminum liquid according to claim 3, wherein the amount of the aluminum liquid slag removing and degassing powder in the step (2) is 0.1-0.4% of the aluminum liquid capacity.
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