WO2021168960A1 - Système de surveillance en ligne pour une performance de refroidissement d'un milieu de trempe - Google Patents

Système de surveillance en ligne pour une performance de refroidissement d'un milieu de trempe Download PDF

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Publication number
WO2021168960A1
WO2021168960A1 PCT/CN2020/081332 CN2020081332W WO2021168960A1 WO 2021168960 A1 WO2021168960 A1 WO 2021168960A1 CN 2020081332 W CN2020081332 W CN 2020081332W WO 2021168960 A1 WO2021168960 A1 WO 2021168960A1
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WO
WIPO (PCT)
Prior art keywords
quenching medium
cooling performance
monitoring system
online monitoring
control unit
Prior art date
Application number
PCT/CN2020/081332
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English (en)
Chinese (zh)
Inventor
聂晓霖
朱国靖
左永平
Original Assignee
南京科润工业介质股份有限公司
南京科润工业技术有限公司
南京科润新材料技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 南京科润工业介质股份有限公司, 南京科润工业技术有限公司, 南京科润新材料技术有限公司 filed Critical 南京科润工业介质股份有限公司
Publication of WO2021168960A1 publication Critical patent/WO2021168960A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity

Definitions

  • the invention relates to an online monitoring system for the cooling performance of a quenching medium, which belongs to the technical field of metal processing oil.
  • cooling curve method is the most intuitive and effective test method to reflect the cooling capacity of the quenching medium. Since the 1960s, the cooling characteristic curve method has been tested all over the world, and is committed to forming relevant standards.
  • the cooling curve method generally uses a probe equipped with a thermocouple, heated in a tubular air furnace, and then transferred to the medium to be measured, and the cooling process is recorded.
  • the most commonly used probes include nickel alloy central temperature probes in the United States, Sweden, and the United Kingdom, surface temperature silver probes in Japan, and central temperature silver probes in France.
  • nickel alloy probes have been recommended by the International Organization for Standardization (IFHT). It is an international standard, namely ISO 9950:1995 "Industrial quenching oil-Determination of cooling characteristics-Nickel-alloy probe test method".
  • the above-mentioned cooling curve method is only used in the laboratory to test the cooling performance of the quenching medium.
  • the performance indicators are very different, and the quality is uneven, and the quenching medium will undergo dynamic changes in performance during the use process.
  • the inability of enterprises to effectively monitor the cooling performance of the quenching medium in a timely manner will ultimately affect the product quality and batch stability of my country's equipment manufacturing industry.
  • the timeliness of feedback is poor, and the maintenance and control of the processing fluid cannot be performed in time, which affects the quality of processed products.
  • the present invention provides an online monitoring system for the cooling performance of the quenching medium, which can monitor the cooling performance of the quenching medium on the production site in real time.
  • An on-line monitoring system for the cooling performance of a quenching medium comprising a measurement sensor placed in the quenching medium.
  • the measurement sensor is composed of an induction coil and a standard probe placed in the geometric center of the induction coil; it also includes an induction heating electrically connected to the induction coil
  • the power supply and the control unit connected with the standard probe through the cable, and the control unit is connected with the induction heating power supply through the cable at the same time.
  • the standard probe is a probe specified by the GB/T 30823 standard or the SH/T 0220 standard.
  • the cross-sectional diameter of the wire used in the induction coil is 3-8mm
  • the inner diameter of the coil is 15-25mm
  • the number of turns of the coil is 6-12
  • the height of the coil is 80-150mm.
  • the induction coil is wound with dense ends and sparse middle, that is, the interval between adjacent turns at both ends of the induction coil is 0.1 ⁇ 0.2mm, and the interval between adjacent turns in the middle of the induction coil is 3 ⁇ 5mm .
  • the induction heating power supply is connected to 380V three-phase alternating current.
  • the induction heating power supply has a circulating cooling unit.
  • control unit includes a wireless communication module, and the control unit is connected to the remote control terminal through the wireless communication module.
  • control unit is located in the industrial site, it has a display screen, the display screen can display the relevant data of the quenching medium monitored in real time, the control unit may also include an alarm module, such as a horn, when the control unit monitors the quenching through the measuring sensor When the cooling performance of the medium cannot meet the use requirements, promptly alert the operators at the industrial site to replace the quenching medium.
  • alarm module such as a horn
  • the working principle of the on-line monitoring system for the cooling performance of the quenching medium of the present invention The entire measuring sensor is placed in the quenching tank containing the quenching medium at the industrial site, and the control unit controls the induction power supply to start heating.
  • the induction heating power supply When it is switched on (the input power of the induction heating power supply is greater than 8KW at this time), the surface temperature of the standard probe exceeds the Leidenfrost temperature of the measured medium and a stable vapor film is formed on the surface of the standard probe.
  • the standard probe In the presence of the vapor film, the standard probe can be heated up to 850°C as a whole), and finally when the overall temperature of the standard probe in the quenching medium reaches 850°C (in the quenching process, the workpiece generally starts to contact the quenching medium and start to be quenched), the control unit controls the induction heating
  • the power supply stops heating, the quenching medium cools down the standard probe, the control unit collects the real-time temperature of the standard probe, and calculates the cooling performance of the quenching medium in combination with the time parameter, and displays the corresponding data on the display screen, and at the same time passes the collected information through
  • the wireless communication module is transmitted to the remote control terminal.
  • the system of the present invention uses electromagnetic induction immersion heating method for heating, which solves the problem that the existing quenching medium cooling characteristic test cannot be detected online.
  • the measurement sensor of the system of the present invention is directly placed in the quenching tank containing the quenching medium.
  • the cooling performance of the on-site quenching medium is monitored in real time, so as to assist the on-site operators in the effective operation and maintenance of the quenching medium, thereby improving the quality stability of the quenching product.
  • Figure 1 is a system schematic diagram of the online monitoring system for quenching medium cooling performance of the present invention
  • Figure 2 is a schematic diagram of the structure of the induction coil.
  • the online monitoring system for the cooling performance of the quenching medium of the present invention includes a measuring sensor 1 placed in the quenching medium 6.
  • the measuring sensor 1 consists of an induction coil 2 and a standard probe 3 placed in the geometric center of the induction coil 2.
  • the composition, that is, the standard probe 3 and the induction coil 2 are fixed together to form the measuring sensor 1 immersed in the medium 6 to be measured, and the measuring sensor 1 is directly placed in the quenching tank 7 containing the quenching medium 6 in the industrial site for online monitoring; the quenching of the present invention
  • the online monitoring system for medium cooling performance also includes an induction heating power supply 4 electrically connected to the induction coil 2 and a control unit 5 connected to the standard probe 3 through a cable.
  • the control unit 5 is simultaneously connected to the induction heating power supply 4 through a cable; wherein, the present invention
  • the standard probe 3 used is a nickel alloy probe specified by the GB/T 30823 standard.
  • the wire turns at both ends of the induction coil 2 used in the online monitoring system of the present invention are dense (that is, the vertical distance between adjacent wires at both ends of the coil is 0.1 ⁇ 0.2mm), and the wire turns in the middle are sparse (that is, adjacent wires in the middle of the coil).
  • the vertical distance of the induction coil 2 is 3 ⁇ 5mm
  • the winding method of the induction coil 2 is to compensate the upper and lower parts of the coil, so that the two ends of the standard probe 3 have greater specific surface power, and the heating temperature at both ends of the compensation is caused by the fast cooling speed. The problem of unevenness.
  • the induction coil 2 requires that the cross-sectional diameter A of the wire is 3 ⁇ 8mm, the inner diameter B of the coil (the circle enclosed by the wire) is 15 ⁇ 25mm, the number of turns of the coil is 6 ⁇ 12, and the height of the coil C is 80. ⁇ 150mm, so as to ensure the uniformity of the temperature of the entire standard probe 3.
  • the thermocouple in the standard probe reflects the overall temperature of the standard probe (rather than the local temperature at the thermocouple), the measurement result is more accurate.
  • the induction heating power supply 4 of the present invention is connected to a 380V three-phase alternating current, with an effective output power> 8Kw, can output a high-frequency oscillating current, and the working frequency range is 30KHz-100KHz.
  • the induction heating power supply 4 can ensure the specific surface power of the surface of the standard probe 3, the output oscillation power of the induction heating power supply 4 is greater than 20Kw, and the effective output power is greater than 8Kw.
  • the induction heating power supply 4 is equipped with a circulating cooling unit 9.
  • the circulating cooling unit 9 adopts dual-channel water cooling or oil cooling to cool the induction heating power supply 4 to prevent the IGBT driver and related components from overheating and damage.
  • the induction heating power supply 4 can adjust the output oscillating current of the induction heating power supply 4 through the control unit 5, thereby adjusting the heating speed. According to the heat exchange capacity of the quenching medium, select the appropriate heating current output, and can also control the induction heating power supply according to the event trigger 4 start and stop, you can start the monitoring of the quenching medium at any time as needed. You can set a fixed time or cycle for monitoring, or you can set trigger events based on the process, such as quenching transfer, furnace door opening, etc.
  • the data acquisition module in the control unit 5 records the heating and cooling process of the standard probe 3, and calculates the key characteristic indexes such as the vapor film formation temperature, upper characteristic temperature, lower characteristic temperature, and maximum cooling rate of the quenching medium, so as to obtain the quenching medium Cooling performance.
  • the control unit 5 of the present invention is located at an industrial site and includes a wireless communication module.
  • the control unit 5 is connected to a remote control terminal through the wireless communication module.
  • the control unit also has a display screen 8.
  • the display screen 8 can display relevant data of the quenching medium monitored in real time
  • the control unit 5 may also include an alarm module, such as a horn.
  • the online monitoring system of the present invention uses electromagnetic induction to provide high specific surface power, and standard probe 3 is immersed in liquid for heating and cooling, thereby realizing online monitoring of quenching medium cooling performance.

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Control Of Heat Treatment Processes (AREA)

Abstract

L'invention concerne un système de surveillance en ligne pour une performance de refroidissement d'un milieu de trempe. Le système comprend un capteur de mesure (1) disposé dans un milieu de trempe (6). Le capteur de mesure (1) est composé d'une bobine d'induction (2) et d'une sonde standard (3) disposée au centre géométrique de la bobine d'induction (2). Le système comprend en outre une alimentation électrique de chauffage par induction (4) connectée électriquement à la bobine d'induction (2) et une unité de commande (5) connectée à la sonde standard (3) au moyen d'un câble et l'unité de commande (5) est connectée à l'alimentation électrique de chauffage par induction (4) au moyen du câble. Le système de surveillance en ligne peut surveiller la performance de refroidissement du milieu de trempe (6) en temps réel sur le site de production.
PCT/CN2020/081332 2020-02-27 2020-03-26 Système de surveillance en ligne pour une performance de refroidissement d'un milieu de trempe WO2021168960A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010123123.XA CN111398336B (zh) 2020-02-27 2020-02-27 一种淬火介质冷却性能的在线监测系统
CN202010123123.X 2020-02-27

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Publication Number Publication Date
WO2021168960A1 true WO2021168960A1 (fr) 2021-09-02

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CN114354680A (zh) * 2021-12-08 2022-04-15 东风汽车集团股份有限公司 一种pag淬火介质冷却性能分析方法

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US20100210026A1 (en) * 2009-02-17 2010-08-19 Christopher Hintz Alkalinity Determination
CN202189025U (zh) * 2011-06-03 2012-04-11 南京科润工业介质有限公司 多功能淬火介质冷却特性测试仪
CN103115941A (zh) * 2013-01-25 2013-05-22 上海交通大学 一种新型闭式导热系数测试装置
CN104597080A (zh) * 2015-01-27 2015-05-06 河海大学常州校区 基于ZigBee的淬火介质冷却性能测试系统及测试方法
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CN207650133U (zh) * 2017-12-28 2018-07-24 南京科润新材料技术有限公司 一种基于android系统下的冷却特性测试装置

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CN106566919A (zh) * 2015-10-10 2017-04-19 十堰双齐科技有限公司 一种在线对pag水基淬火介质冷却性能进行监控的装置
US11014148B2 (en) * 2016-09-23 2021-05-25 Afc-Holcroft, Llc Method for measuring and continuously monitoring the heat transfer characteristics of a fluid in a system
CN109387534B (zh) * 2018-10-26 2020-12-08 西安建筑科技大学 一种淬火液毒性试验装置及方法
CN212301382U (zh) * 2020-02-27 2021-01-05 南京科润工业介质股份有限公司 一种淬火介质热稳定性的测试装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1196654A (zh) * 1997-03-14 1998-10-21 白光株式会社 加热器－传感器复合装置
US20100210026A1 (en) * 2009-02-17 2010-08-19 Christopher Hintz Alkalinity Determination
CN202189025U (zh) * 2011-06-03 2012-04-11 南京科润工业介质有限公司 多功能淬火介质冷却特性测试仪
CN103115941A (zh) * 2013-01-25 2013-05-22 上海交通大学 一种新型闭式导热系数测试装置
CN104597080A (zh) * 2015-01-27 2015-05-06 河海大学常州校区 基于ZigBee的淬火介质冷却性能测试系统及测试方法
CN204882428U (zh) * 2015-07-08 2015-12-16 天津市热处理研究所有限公司 一种用于淬火介质的检测系统
CN206291973U (zh) * 2016-12-27 2017-06-30 南京科润新材料技术有限公司 一种高频无线淬火介质温度采集系统
CN207650133U (zh) * 2017-12-28 2018-07-24 南京科润新材料技术有限公司 一种基于android系统下的冷却特性测试装置

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