CN113977053B - Rapid cooling device for welding electrode and application method of rapid cooling device - Google Patents
Rapid cooling device for welding electrode and application method of rapid cooling device Download PDFInfo
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- CN113977053B CN113977053B CN202111402549.XA CN202111402549A CN113977053B CN 113977053 B CN113977053 B CN 113977053B CN 202111402549 A CN202111402549 A CN 202111402549A CN 113977053 B CN113977053 B CN 113977053B
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- cooling device
- air inlet
- rapid cooling
- drainage tube
- furnace body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
Abstract
The invention discloses a rapid cooling device for a welding electrode and a use method thereof. The device can effectively solve the problem of long cooling time existing in the existing cooling device.
Description
Technical Field
The invention belongs to the technical field of cooling devices, and particularly relates to a rapid cooling device and a cooling method for a welding electrode.
Background
Vacuum consumable arc melting is the most main production mode of titanium alloy melting at home and abroad, and because titanium reacts with O, N in air at high temperature, the titanium and titanium alloy melting and cooling processes must be isolated from air. At present, high-end titanium and titanium alloy electrodes are mostly welded in vacuum, vacuum and argon flushing cooling are adopted after welding is finished, and after the temperature of the electrodes is less than 300 ℃, furnace opening is carried out for checking, cleaning and welding scar. The vacuum cooling time is usually more than 2 hours, the argon flushing cooling time is more than 1 hour, the electrode is not reacted with air to change color after the furnace is opened, the cooling process prolongs the production period, and the production efficiency of titanium and titanium alloy cast ingots is reduced. In order to improve the production efficiency and shorten the argon-flushing cooling time to 5-10min, the mode can cause local oxidation discoloration of the electrode, so that the local oxygen content in the ingot casting product is increased, and the quality control of titanium and titanium alloy ingots is affected.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rapid cooling device for a welding electrode and a use method thereof, and the device can effectively solve the problem of long cooling time of the conventional cooling device.
In order to achieve the above purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a welding electrode's quick cooling device, includes drainage tube, air inlet pipeline and exhaust pipeline, and air inlet pipeline's both ends communicate with drainage tube and furnace body respectively, and exhaust pipeline's both ends communicate with furnace body and the end of drainage tube respectively, and the drainage tube includes shrink section and expansion section, is provided with the heat exchanger on the expansion section, and the drainage tube front end is provided with the toper nozzle.
Optimally, the diameter of the conical nozzle is 0.5-2mm, and the length-diameter ratio is less than 2-3:1.
Optimally, the conical nozzle is connected with an argon gas source, and the inlet pressure of the argon gas source is more than or equal to 0.2Mpa.
Optimally, the diameter of the air inlet pipeline is more than or equal to 15mm, and the diameter of the air outlet pipeline is 1.5-2 times of the diameter of the air inlet pipeline.
Optimally, an air inlet valve is arranged on the air inlet pipeline, and an air outlet valve is arranged on the air outlet pipeline.
Optimally, the air inlet pipeline is connected with the upper part of the furnace body, and the air outlet pipeline is connected with the lower part of the furnace body.
Optimally, the length-diameter ratio of the contraction section is less than 2-3.5:1, and the length-diameter ratio of the expansion section is less than 30:1.
Optimally, the tail end of the heat exchanger is connected with a cooling fan.
In the scheme, the heat exchanger is a fin heat exchanger, the drainage tube mainly utilizes the venturi principle, heated argon is cooled through the expansion section and the heat exchanger, gas forms a temperature difference, continuous circulation of gas is promoted, heat exchange is continuously carried out in the circulation process, and the purpose of cooling the electrode is achieved.
The application method of the rapid cooling device of the welding electrode comprises the following steps:
(1) After the welding is finished, closing other valves on the furnace body, and then opening an air inlet valve and an air outlet valve;
(2) Argon is filled into the drainage tube through the conical nozzle, and the argon circulates among the drainage tube, the exhaust pipeline, the furnace body and the air inlet pipeline, and radiates heat through the heat exchanger in the circulation process.
The beneficial effects of the invention are as follows:
1. the device is connected with an argon gas source, and argon realizes full-closed circulation, so that pollutants are prevented from being brought into other mechanical drainage modes to influence the quality of titanium products.
2. The size design of each part in the device is reasonable, the pressure difference mode is formed by utilizing the gas flow and the gas cooling volume reduction, the system can still circularly flow for 2-5min after the argon filling is stopped, the system can effectively strengthen the heat transfer of the electrode, and the cooling time is reduced to 5-10min from 1-2 h.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
reference numerals: 1. a drainage tube; 2. an air intake line; 3. an exhaust line; 4. a constriction section; 5. an expansion section; 6. a heat exchanger; 7. a conical nozzle; 8. a heat radiation fan.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the drawings.
In one embodiment of the present invention, as shown in fig. 1, there is provided a rapid cooling device for a welding electrode, comprising a drain tube 1, an intake pipe 2 and an exhaust pipe 3, wherein the diameter of the intake pipe 2 is preferably 20mm, and the diameter of the exhaust pipe 3 is preferably 2 times the diameter of the intake pipe 2.
Two ends of the air inlet pipeline 2 are respectively communicated with the drainage tube 1 and the furnace body, two ends of the air outlet pipeline 3 are respectively communicated with the furnace body and the tail ends of the drainage tube 2, the drainage tube 1 comprises a contraction section 4 and an expansion section 5, optimally, the length-diameter ratio of the contraction section 4 is 2:1, and the length-diameter ratio of the expansion section 5 is less than 30:1; the expansion section 5 is provided with a heat exchanger 6, and optimally, the tail end of the heat exchanger 6 is connected with a heat radiation fan 8. The front end of the drainage tube 1 is provided with a conical nozzle 7. Optimally, the diameter of the conical nozzle 7 is 1mm and the aspect ratio is less than 3:1. Optimally, the conical nozzle 7 is connected with an argon gas source, and the inlet pressure of the argon gas source is 0.3Mpa. Optimally, an air inlet valve is arranged on the air inlet pipeline 2, and an air outlet valve is arranged on the air outlet pipeline. Optimally, the air inlet pipeline 2 is connected with the upper part of the furnace body, and the air outlet pipeline 3 is connected with the lower part of the furnace body.
The application method of the rapid cooling device for the welding electrode comprises the following steps:
(1) The electrode rod is provided with an auxiliary electrode, the consumable electrode is hoisted in, the consumable electrode is fixedly positioned in the center of the fixture, the cleaning crucible is sealed with the upper furnace chamber, the upper furnace chamber is sealed in a descending manner, vacuum is started, a vacuum pump valve, an exhaust valve and an air inlet valve are opened, the system is evacuated, the vacuum welding pressure requirement (less than 5 pa) of the titanium and titanium alloy electrode is met, and then the exhaust valve and the air inlet valve are closed;
(2) Lowering the electrode rod, starting a power supply, starting arc melting to form a small amount of molten pool, stopping the power supply and lowering the electrode rod, welding an auxiliary electrode with a consumable electrode, closing a vacuum pump valve, sequentially opening an air inlet valve and an air outlet valve, and starting a heat exchanger fan;
(3) Confirming that the pressure of an argon main pipe is more than 0.3MPa, opening an argon inlet valve, injecting argon through a nozzle, a throat, an expansion section, a heat exchanger and an air outlet pipe, entering the lower side of an electrode in the furnace, and forming argon closed circulation under the drainage effect of a venturi device through an air inlet pipeline by welding heated parts; continuously circulating the heated argon for 2-5min after the heated argon passes through the expansion section and the heat exchanger to be cooled; the vacuum in the furnace is 0.3-5pa, argon is filled to 10000-50000pa, and the argon filling time lasts for 3-5min; the system realizes closed self-circulation cooling, and the cooling time is reduced from 1 to 2 hours to 5 to 10 minutes.
(4) After stopping argon filling, closing an argon inlet valve, keeping the inlet valve and an exhaust valve open, and after the system is continuously cooled for 5-10min, finishing electrode cooling, wherein the electrode temperature is less than 300 ℃; closing the air inlet valve and the air outlet valve, opening the vacuum valve to empty, lifting the upper furnace chamber, removing electrode scars, taking out the fixing clamp, and providing the condition of sealing the furnace for smelting.
Claims (5)
1. The rapid cooling device for the welding electrode is characterized by comprising a drainage tube (1), an air inlet pipeline (2) and an exhaust pipeline (3), wherein two ends of the air inlet pipeline (2) are respectively communicated with the drainage tube (1) and a furnace body, two ends of the exhaust pipeline (3) are respectively communicated with the furnace body and the tail end of the drainage tube (2), the drainage tube (1) comprises a contraction section (4) and an expansion section (5), a heat exchanger (6) is arranged on the expansion section (5), and a conical nozzle (7) is arranged at the front end of the drainage tube (1); the diameter of the conical nozzle (7) is 0.5-2mm, and the length-diameter ratio is less than 2-3:1; the conical nozzle (7) is connected with an argon gas source, and the inlet pressure of the argon gas source is more than or equal to 0.2Mpa; the diameter of the air inlet pipeline (2) is more than or equal to 15mm, and the diameter of the air outlet pipeline (3) is 1.5-2 times of the diameter of the air inlet pipeline (2); the length-diameter ratio of the contraction section (4) is smaller than 2-3.5:1, and the length-diameter ratio of the expansion section (5) is smaller than 30:1.
2. The rapid cooling device for welding electrodes according to claim 1, characterized in that the air inlet pipe (2) is provided with an air inlet valve and the air outlet pipe is provided with an air outlet valve.
3. The rapid cooling device for welding electrodes according to claim 1, characterized in that the air intake pipe (2) is connected to the upper part of the furnace body and the air exhaust pipe (3) is connected to the lower part of the furnace body.
4. The rapid cooling device for welding electrodes according to claim 1, characterized in that the heat exchanger (6) is connected at its end with a cooling fan (8).
5. Use of the rapid cooling device for welding electrodes according to any of claims 1-4, characterized in that it comprises the following steps:
(1) After welding is completed, closing other valves on the furnace body, and then opening an air inlet valve and an air outlet valve;
(2) Argon is filled into the drainage tube (1) through the conical nozzle (7), and the argon circulates among the drainage tube (1), the exhaust pipeline (3), the furnace body and the air inlet pipeline (2), and heat is dissipated through the heat exchanger (6) in the circulation process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111402549.XA CN113977053B (en) | 2021-11-24 | 2021-11-24 | Rapid cooling device for welding electrode and application method of rapid cooling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111402549.XA CN113977053B (en) | 2021-11-24 | 2021-11-24 | Rapid cooling device for welding electrode and application method of rapid cooling device |
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| Publication Number | Publication Date |
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| CN113977053A CN113977053A (en) | 2022-01-28 |
| CN113977053B true CN113977053B (en) | 2023-05-09 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| LV13528B (en) * | 2006-09-25 | 2007-03-20 | Ervins Blumbergs | Method and apparatus for continuous producing of metallic tifanium and titanium-bases alloys |
| US8402784B2 (en) * | 2008-03-13 | 2013-03-26 | Machflow Energy, Inc. | Cylindrical Bernoulli heat pumps |
| JP2015081508A (en) * | 2013-10-21 | 2015-04-27 | カルソニックカンセイ株式会社 | Cooling device |
| CN105180638B (en) * | 2015-08-03 | 2017-05-10 | 天华化工机械及自动化研究设计院有限公司 | Venturi type powered coal cooling method with inert gas circulation |
| CN108866345A (en) * | 2018-07-27 | 2018-11-23 | 东北大学 | A kind of vacuum electroslag remelting furnace melting high-cleanness, high steel ingot method |
| CN210068419U (en) * | 2019-04-04 | 2020-02-14 | 湖北泰盛化工有限公司 | Cooling water circulation vacuum unit |
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