JPH0410560Y2 - - Google Patents
Info
- Publication number
- JPH0410560Y2 JPH0410560Y2 JP1985073148U JP7314885U JPH0410560Y2 JP H0410560 Y2 JPH0410560 Y2 JP H0410560Y2 JP 1985073148 U JP1985073148 U JP 1985073148U JP 7314885 U JP7314885 U JP 7314885U JP H0410560 Y2 JPH0410560 Y2 JP H0410560Y2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- pump cylinder
- molten metal
- cylinder
- electric heater
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
- 229910052751 metal Inorganic materials 0.000 claims description 41
- 239000002184 metal Substances 0.000 claims description 41
- 230000008018 melting Effects 0.000 claims description 29
- 238000002844 melting Methods 0.000 claims description 29
- 238000003756 stirring Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 230000009970 fire resistant effect Effects 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は溶融炉側部に該炉との連通孔を介して
設けられたポンプシリンダ内周壁に溶融金属を付
着しないようにする金属溶湯攪拌装置に関する。[Detailed description of the invention] [Industrial application field] The present invention is a molten metal stirring method that prevents molten metal from adhering to the inner circumferential wall of a pump cylinder provided on the side of a melting furnace through a communication hole with the furnace. Regarding equipment.
アルミニウム、銅、亜鉛などの金属溶融炉で
は、炉内の溶湯を攪拌しないと、溶融時間が長く
なり、加熱すべき温度が高くなる外に、酸化物の
発生量が多くなる。従つて溶湯を攪拌することが
重要である。アルミニウムの場合、攪拌によつて
炉内での酸化物の発生量、溶融時間が共に約10％
減少することが認められている。
In a furnace for melting metals such as aluminum, copper, and zinc, if the molten metal in the furnace is not stirred, the melting time becomes longer, the temperature at which it must be heated becomes higher, and the amount of oxides generated increases. Therefore, it is important to stir the molten metal. In the case of aluminum, both the amount of oxide generated in the furnace and the melting time are reduced by approximately 10% due to stirring.
It is recognized that the
第２図は本出願人が提案した機械的攪拌装置の
概略構成を示す。同図において、溶融炉１の側壁
下部には、該炉との連通孔２を内設した耐火物に
よる中間体３が設けられ、この中間体３の上方部
にはポンプシリンダ４が取り付けられる。該ポン
プシリンダは内壁を耐火材料５で内張りし、この
外周には耐熱金属製筒体６が取り付けられ、該筒
体にはポンプシリンダ４の内温度測定用サーモカ
ツプル７が接触して装着される。上記ポンプシリ
ンダ４の上方端は、外気と負圧との自動切換バル
ブ９、サイクロン１０、フイルタ１１などを介在
させた通気管１２によつて真空ブロワ１３に接続
される。真空ブロア１３はモータ１４によつて駆
動され、ポンプシリンダ４内に溶融炉１から溶油
を吸入し、この吸入の所定時間後に、通気管１２
を介設する自動切換バルブ９が切り換わつて、外
気をポンプシリンダ４に導入する。この導入され
た外気のために、ポンプシリンダ４内に吸い上げ
られた溶湯は自重で溶融炉１内に戻り、該炉に滞
留している溶湯に対流が生じ、溶湯が攪拌され
る。 FIG. 2 shows a schematic configuration of a mechanical stirring device proposed by the applicant. In the figure, a refractory intermediate body 3 having a communication hole 2 with the furnace is provided at the lower part of the side wall of a melting furnace 1, and a pump cylinder 4 is attached to the upper part of this intermediate body 3. The inner wall of the pump cylinder is lined with a refractory material 5, and a heat-resistant metal cylinder 6 is attached to the outer periphery of the pump cylinder, and a thermocouple 7 for measuring the internal temperature of the pump cylinder 4 is attached in contact with the cylinder. . The upper end of the pump cylinder 4 is connected to a vacuum blower 13 through a ventilation pipe 12 with an automatic switching valve 9 between outside air and negative pressure, a cyclone 10, a filter 11, etc. interposed therebetween. The vacuum blower 13 is driven by a motor 14 and sucks molten oil from the melting furnace 1 into the pump cylinder 4, and after a predetermined time of this suction, the vent pipe 12
The automatic switching valve 9 provided therein switches to introduce outside air into the pump cylinder 4. Due to this introduced outside air, the molten metal sucked up into the pump cylinder 4 returns to the melting furnace 1 by its own weight, and convection occurs in the molten metal staying in the furnace, causing the molten metal to be stirred.
アルミニウムを例にとつて溶融動作を説明する
と、アルミニウムは融点が660℃なので、溶融炉
１からポンプシリンダ４内に導入された溶湯の温
度は融点660℃より幾分低下する。この温度が低
下して固体化した溶融アルミニウムはポンプシリ
ンダ４の内周壁に付着する。上記溶湯の固体化を
避けるため、電気ヒータ８の温度を融点660℃よ
りあまり高くすると、溶融金属の酸化がはげしく
なるという問題点が生じる。
To explain the melting operation using aluminum as an example, since aluminum has a melting point of 660°C, the temperature of the molten metal introduced into the pump cylinder 4 from the melting furnace 1 is slightly lower than the melting point of 660°C. The molten aluminum solidified by this temperature drop adheres to the inner circumferential wall of the pump cylinder 4. In order to avoid solidification of the molten metal, if the temperature of the electric heater 8 is set too high above the melting point of 660° C., a problem arises in that the oxidation of the molten metal increases.
更にポンプシリンダ４の壁面には、次の場合に
酸化物が付着する。溶融炉１表面で発生した酸化
物１５′が溶湯の吸引・吐出の際に、ポンプシリ
ンダ壁内に付着する場合、溶湯１６を外部に取り
出し、溶融炉１内の溶湯水位が連通孔２の入口付
近まで下がつた状態でポンプシリンダ４の吸入が
行われ、溶融炉１表面の金属酸化物１５をポンプ
シリンダ４内に吸入する場合などである。 Furthermore, oxides adhere to the wall surface of the pump cylinder 4 in the following cases. If oxides 15' generated on the surface of the melting furnace 1 adhere to the inside of the pump cylinder wall when the molten metal is sucked and discharged, the molten metal 16 is taken out to the outside and the molten metal water level in the melting furnace 1 is lowered to the entrance of the communication hole 2. This is the case, for example, when the pump cylinder 4 is sucked into the pump cylinder 4 while the metal oxide 15 on the surface of the melting furnace 1 is sucked into the pump cylinder 4.
従来は、作業者がサーモカツプル７でポンプシ
リンダ４の内壁温度を検出し、電気ヒータ８の加
熱をオン・オフによつて調整していたので、一定
した温度に保持することが出来なかつた。 Conventionally, an operator detected the inner wall temperature of the pump cylinder 4 using a thermocouple 7 and adjusted the heating of the electric heater 8 by turning it on and off, making it impossible to maintain a constant temperature.
本考案はポンプシリンダの内壁温度を所定の目
標温度に昇温するとともに、その温度を一定温
度、すなわち温度の変動が目標温度の上下ででき
る限り小さい範囲内となるように保持することが
できる金属溶湯攪拌装置を提供することを課題と
する。 This invention is a metal that can raise the inner wall temperature of the pump cylinder to a predetermined target temperature and maintain that temperature at a constant temperature, that is, the temperature fluctuation is within the smallest possible range above and below the target temperature. An object of the present invention is to provide a molten metal stirring device.
金属溶融炉内の溶湯を汲い上げた後に該炉内に
排出するポンプシリンダを備えるものにおいて、
上記ポンプシリンダはこのポンプシリンダの内壁
を耐火材料で内張りした耐熱金属製筒体から成る
と共に上記ポンプシリンダの外周にはこのポンプ
シリンダの内壁面を加熱する電気ヒータが巻装さ
れる外に上記ポンプシリンダの温度を測定するサ
ーモカツプルが接触して装着され、該サーモカツ
プルの検出温度信号と温度設定器における溶融金
属の溶融温度より高い設定温度信号との偏差信号
が入力されて上記ポンプシリンダ内の温度を上記
設定温度となるように上記電気ヒータの電流値を
調整する制御手段とを備えて構成したことを特徴
とする金属溶湯攪拌装置。
A metal melting furnace equipped with a pump cylinder that pumps up molten metal and then discharges it into the furnace,
The pump cylinder is made of a heat-resistant metal cylinder whose inner wall is lined with a fire-resistant material, and an electric heater is wrapped around the outer circumference of the pump cylinder to heat the inner wall surface of the pump cylinder. A thermocouple for measuring the temperature of the cylinder is attached in contact with the cylinder, and a deviation signal between the detected temperature signal of the thermocouple and a set temperature signal higher than the melting temperature of the molten metal in the temperature setting device is inputted, and the temperature inside the pump cylinder is inputted. A molten metal stirring device comprising: a control means for adjusting the current value of the electric heater so that the temperature becomes the set temperature.
本考案は、上記ポンプシリンダを内周を耐火材
料で内張りした耐熱金属製筒体で形成し、このポ
ンプシリンダの外周に電気ヒータを設け、この加
熱の制御手段を調整して、ポンプシリンダの温度
を、溶融金属の融点例えばアルミニウムの場合に
は、その融点660℃より20〜50℃高い値となるよ
うに電気ヒータの電流を制御する。融点より20〜
50℃高く制御するのは、これ以上高い温度に制御
するとポンプシリンダ内の溶融金属が酸化するこ
とになり、融点以下に制御すると固体化してポン
プシリンダ内壁に付着するので、これを避けるた
めである。従つて、ポンプシリンダ内溶湯の吸
引・吐出作業が効率よく行われる。
In the present invention, the pump cylinder is formed of a heat-resistant metal cylinder whose inner periphery is lined with a fire-resistant material, an electric heater is provided on the outer periphery of the pump cylinder, and the heating control means is adjusted to control the temperature of the pump cylinder. The electric current of the electric heater is controlled so that the melting point of the molten metal, for example, in the case of aluminum, is 20 to 50°C higher than the melting point of 660°C. 20~ from melting point
The reason for controlling the temperature higher than 50℃ is to avoid the fact that if the temperature is higher than this, the molten metal inside the pump cylinder will oxidize, and if it is controlled below the melting point, it will solidify and adhere to the inner wall of the pump cylinder. . Therefore, suction and discharge of the molten metal within the pump cylinder can be performed efficiently.
以下、本考案の実施例を図面を参照して説明す
る。第１図は本考案実施例の電気回路で第２図に
示された本出願人が提案した溶湯攪拌装置におけ
るポンプシリンダの内壁温度を調整する電気回路
図である。同図において、８は第２図に示された
溶融炉１に連通して設けたポンプシリンダ４を加
熱する電気ヒータである。端子２０に加えられた
交流電圧は整流器２１を介してサイリスタを備え
たチヨツプ部２２に加えられると共に、チヨツプ
部２２を構成するサイリスタの通流率制御回路２
３の出力もチヨツプ部２２に加えられる。通流率
を制御されたチヨツプ部２２を介した電流は電気
ヒータ８に加えられる。従来方式の構成を示す第
２図のポンプシリンダ４に接触して装着されたサ
ーモカツプル７が測定したポンプシリンダ４の検
出温度信号は比較器２５に加えられると共に、温
度設定器２４の設定温度信号も比較器２５に加え
られ、その偏差信号は通流率制御回路２３へ加え
られる。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an electrical circuit diagram of an embodiment of the present invention for adjusting the inner wall temperature of a pump cylinder in the molten metal stirring apparatus proposed by the applicant shown in FIG. 2. In the figure, reference numeral 8 denotes an electric heater that heats the pump cylinder 4 provided in communication with the melting furnace 1 shown in FIG. The AC voltage applied to the terminal 20 is applied to the chop section 22 equipped with a thyristor via a rectifier 21, and is also applied to the conduction rate control circuit 2 of the thyristor that constitutes the chop section 22.
The output of No. 3 is also applied to the chop section 22. A current is applied to the electric heater 8 through the chop section 22 whose conduction rate is controlled. The detection temperature signal of the pump cylinder 4 measured by the thermocouple 7 mounted in contact with the pump cylinder 4 in FIG. is also applied to the comparator 25, and its deviation signal is applied to the conduction rate control circuit 23.
次に動作を説明する。 Next, the operation will be explained.
サーモカツプル７はポンプシリンダ４に接触配
設されているので、該サーモカツプルはポンプシ
リンダ４内部の溶湯温度を検出する。この検出温
度信号と設定温度信号との偏差記号は、通流率制
御回路２３において、上記偏差信号に応じてチヨ
ツプ部２２のサイリスタの通流率を制御する。従
つて通流率制御回路２３には、サーモカツプル７
の検出温度が設定温度より大きいときは、偏差信
号は負となるので、チヨツプ部２２から電気ヒー
タ８に加えられる電流は小となる。逆に、サーモ
カツプル７の検出温度が設定温度より低いとき
は、偏差信号は正となつて、チヨツプ部２２の出
力電流は大となり、電気ヒータに加えられる電流
は大となる。従つて、溶融金属がアルミニウムの
場合は、アルミニウムの融点が660℃であるから、
温度設定器２４の設定温度信号を680℃に調整す
れば、ポンプシリンダ４の内壁温度も680℃に保
持することができる。 Since the thermocouple 7 is arranged in contact with the pump cylinder 4, the thermocouple detects the temperature of the molten metal inside the pump cylinder 4. The deviation symbol between the detected temperature signal and the set temperature signal is used in the conduction rate control circuit 23 to control the conduction rate of the thyristor of the chop section 22 according to the deviation signal. Therefore, the conduction rate control circuit 23 includes a thermocouple 7.
When the detected temperature is higher than the set temperature, the deviation signal becomes negative, so the current applied from the chop section 22 to the electric heater 8 becomes small. Conversely, when the temperature detected by the thermocouple 7 is lower than the set temperature, the deviation signal becomes positive, the output current of the chop section 22 becomes large, and the current applied to the electric heater becomes large. Therefore, if the molten metal is aluminum, since the melting point of aluminum is 660℃,
By adjusting the set temperature signal of the temperature setting device 24 to 680°C, the inner wall temperature of the pump cylinder 4 can also be maintained at 680°C.
なお、本考案は上記チヨツプ部に限定されるも
のではなく、サーモカツプルの検出信号と設定温
度信号との偏差信号に応じて電気ヒータの電流が
制御される手段であれば差支えない。 It should be noted that the present invention is not limited to the above-mentioned tip portion, and any means may be used as long as the current of the electric heater is controlled according to the deviation signal between the detection signal of the thermocouple and the set temperature signal.
以上説明のように、本考案はサーモカツプルを
用いて内周を耐火材料で内張りした耐熱金属製筒
体で形成したポンプシリンダ内の溶融金属温度を
測定し、この検出温度信号と、温度設定器の設定
温度信号との偏差信号を制御手段に加え、該制御
手段の出力信号に応じて上記ポンプシリンダの加
熱用電気ヒータを通電し、しかも、上記温度設定
器には、内壁の温度範囲を溶融金属の融点よりも
所定温度高い一定範囲値に設定するように構成し
たので、ポンプシリンダの内壁温度を目標温度近
辺の小さい変動幅の範囲内に制御ができて、溶融
炉内に投入された冷材の溶湯を吸い込んだポンプ
シリンダは、吸い込んだ溶湯の温度が冷材の融点
より、所定温度大きいので、ポンプシリンダ内周
壁に固体化して付着することがないばかりでな
く、吸い込んだ溶湯が酸化して付着成長すること
がないという効果を有する。
As explained above, the present invention uses a thermocouple to measure the molten metal temperature inside a pump cylinder formed of a heat-resistant metal cylinder whose inner periphery is lined with a fire-resistant material, and uses this detected temperature signal and a temperature setting device. A deviation signal from a set temperature signal is applied to the control means, and the electric heater for heating the pump cylinder is energized in accordance with the output signal of the control means, and the temperature setting device is provided with a temperature range within which the temperature of the inner wall is melted. Since the configuration is configured to set the temperature within a certain range, which is higher than the melting point of the metal, the inner wall temperature of the pump cylinder can be controlled within a small fluctuation range around the target temperature, and the temperature of the coolant input into the melting furnace can be controlled within a small fluctuation range around the target temperature. The temperature of the molten metal sucked into the pump cylinder is higher than the melting point of the cold material by a predetermined temperature, so not only does it not solidify and adhere to the inner peripheral wall of the pump cylinder, but the molten metal sucked in does not oxidize. This has the effect of preventing adhesion and growth.
また、ポンプシリンダの内方を炭化珪素質耐火
物で内張りした断熱材を外囲して、電気ヒータを
設け、この電気ヒータにより上記断熱材の部分の
内面温度を所定温度まで加熱する公知の装置に比
べると、本考案は上記断熱材の代りに、耐熱金属
製筒体で形成したので、ポンプシリンダの内面温
度をヒータの加熱によつて極めて容易かつ確実に
保持できる効果がある。 Furthermore, there is a known device in which an electric heater is provided around the inside of the pump cylinder with a heat insulating material lined with a silicon carbide refractory, and the electric heater heats the inner surface temperature of the heat insulating material to a predetermined temperature. Compared to the above, the present invention uses a heat-resistant metal cylindrical body instead of the above-mentioned heat insulating material, so it has the effect of being able to maintain the inner surface temperature of the pump cylinder extremely easily and reliably by heating the pump cylinder.
第１図は本考案実施例の電気回路図、第２図は
本出願人が提案した方式の金属溶湯攪拌装置の概
略構成図である。
１……溶融炉、２……ノズル、４……ポンプシ
リンダ、５……耐火材料、６……ステンレス製筒
体、７……サーモカツプル、８……電気ヒータ、
２０……AC電源、２１……整流器、２２……チ
ヨツプ部、２３……通流率制御回路、２４……温
度設定器、２５……比較器。
FIG. 1 is an electric circuit diagram of an embodiment of the present invention, and FIG. 2 is a schematic diagram of a molten metal stirring apparatus proposed by the applicant. 1... Melting furnace, 2... Nozzle, 4... Pump cylinder, 5... Refractory material, 6... Stainless steel cylinder, 7... Thermocouple, 8... Electric heater,
20... AC power supply, 21... Rectifier, 22... Chip section, 23... Conductivity control circuit, 24... Temperature setting device, 25... Comparator.
Claims (1)
排出するポンプシリンダを備えるものにおいて、
上記ポンプシリンダはこのポンプシリンダの内壁
を耐火材料で内張りした耐熱金属製筒体から成る
と共に上記ポンプシリンダの外周にはこのポンプ
シリンダの内壁面を加熱する電気ヒータが巻装さ
れる外に上記ポンプシリンダの温度を測定するサ
ーモカツプルが接触して装着され、上記サーモカ
ツプルの検出温度信号と温度設定器における溶融
金属の溶融温度より高い設定温度信号との偏差信
号が入力されて上記ポンプシリンダ内の温度を上
記設定温度となるように上記電気ヒータの電流値
を調整する制御手段を備えて構成したことを特徴
とする金属溶湯攪拌装置。 In a metal melting furnace equipped with a pump cylinder that sucks up molten metal and then discharges it into the furnace,
The pump cylinder is made of a heat-resistant metal cylinder whose inner wall is lined with a fire-resistant material, and an electric heater is wrapped around the outer circumference of the pump cylinder to heat the inner wall surface of the pump cylinder. A thermocouple that measures the temperature of the cylinder is attached in contact with the cylinder, and a deviation signal between the detected temperature signal of the thermocouple and a set temperature signal higher than the melting temperature of the molten metal in the temperature setting device is input, and the temperature inside the pump cylinder is inputted. A molten metal stirring device comprising: a control means for adjusting a current value of the electric heater so that the temperature reaches the set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985073148U JPH0410560Y2 (en) | 1985-05-17 | 1985-05-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985073148U JPH0410560Y2 (en) | 1985-05-17 | 1985-05-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61189200U JPS61189200U (en) | 1986-11-26 |
| JPH0410560Y2 true JPH0410560Y2 (en) | 1992-03-16 |
Family
ID=30612233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985073148U Expired JPH0410560Y2 (en) | 1985-05-17 | 1985-05-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0410560Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185730A (en) * | 1982-04-23 | 1983-10-29 | Shinmei Eng Kk | Control device for stirrer for molten metal |
| JPS5913015A (en) * | 1982-07-14 | 1984-01-23 | Shinmei Eng Kk | Stirrer for molten metal |
-
1985
- 1985-05-17 JP JP1985073148U patent/JPH0410560Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58185730A (en) * | 1982-04-23 | 1983-10-29 | Shinmei Eng Kk | Control device for stirrer for molten metal |
| JPS5913015A (en) * | 1982-07-14 | 1984-01-23 | Shinmei Eng Kk | Stirrer for molten metal |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61189200U (en) | 1986-11-26 |
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