JPH0116766Y2 - - Google Patents
Info
- Publication number
- JPH0116766Y2 JPH0116766Y2 JP12015985U JP12015985U JPH0116766Y2 JP H0116766 Y2 JPH0116766 Y2 JP H0116766Y2 JP 12015985 U JP12015985 U JP 12015985U JP 12015985 U JP12015985 U JP 12015985U JP H0116766 Y2 JPH0116766 Y2 JP H0116766Y2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- valve
- solenoid
- exhaust pipe
- ring burner
- 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
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000007789 gas Substances 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- 238000004880 explosion Methods 0.000 description 8
- 239000000725 suspension Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は雰囲気炉の炉圧調整装置に関するもの
で、特に炉内負圧を迅速に回復させ、各扉部のパ
ツキン部分等からの外気（特に酸素）の吸込みに
よる炉内雰囲気の乱れ及び爆発等を防止するもの
である。[Detailed description of the invention] [Industrial field of application] The present invention relates to a furnace pressure regulating device for an atmosphere furnace. This is to prevent disturbances in the atmosphere inside the furnace and explosions caused by inhalation of oxygen (especially oxygen).
従来、ガス浸炭等に使用される雰囲気炉におい
ては被処理品の炉内装入位置の差による硬化層の
不均一及び負圧になつて炉内への外気流入による
炉内雰囲気の乱れあるいは爆発等の危険を防止す
るため、炉内雰囲気が１時間あたり、５〜10回置
換えられるようにエンドサーミツクガス等のキヤ
リアーガスを大量に供給し、炉内圧を保つてい
る。
Conventionally, in atmosphere furnaces used for gas carburizing, etc., the hardened layer is uneven due to the difference in the insertion position of the workpiece into the furnace, and negative pressure is created and outside air flows into the furnace, resulting in turbulence in the furnace atmosphere or explosions. To prevent this risk, a large amount of carrier gas such as endothermic gas is supplied to maintain the furnace pressure so that the atmosphere inside the furnace is replaced 5 to 10 times per hour.
その場合には使用済の排ガスを排気筒より流出
させて燃焼させている（実願昭58−185324号）。 In that case, the spent exhaust gas is discharged from the exhaust stack and burned (Utility Application No. 185324-1981).
上記従来の方法にあつては炉内が負圧となるこ
とはほとんどあり得ない。 In the conventional method described above, it is almost impossible for the inside of the furnace to become under negative pressure.
しかしながら、近時、変成炉を使用せず、雰囲
気炉内に直接、炭化水素ガス等の原料ガスを供給
する方法が提供されている（特開昭59−222571
号、特願昭59−281499号）。 However, recently, a method has been proposed to directly supply raw material gas such as hydrocarbon gas into an atmosphere furnace without using a shift furnace (Japanese Patent Laid-Open No. 59-222571
No. 59-281499).
この方法にあつては雰囲気炉内に供給されるガ
ス量は上記従来の方法に位べて極めて少く経済的
であるが、被処理品の装入、移動等のための入口
扉、中間扉、出口扉の開閉に伴い、炉内が負圧に
なり、上記各扉部のパツキン部分等から外気（特
に酸素）を吸込み、炉内雰囲気が乱され、爆発等
の危険がある。 In this method, the amount of gas supplied into the atmosphere furnace is extremely small compared to the above-mentioned conventional method, and it is economical. As the exit door opens and closes, the inside of the furnace becomes negative pressure, and outside air (particularly oxygen) is sucked in through the gaskets of each door, disturbing the atmosphere inside the furnace and creating a risk of explosion.
また、上記パツキン部分等はもともと外気の吸
込み等を予定していないものであり、密着等して
炉内負圧の回復に時間を要するとともに、炉構
造、パツキン等を負圧に耐える構造とする等の負
圧対策を必要とするものであつた。 Additionally, the gaskets and other parts mentioned above were not originally intended to draw in outside air, so it takes time to recover the negative pressure inside the furnace due to close contact, etc., and the furnace structure, gaskets, etc. must be designed to withstand negative pressure. Negative pressure measures such as these were required.
本考案は上記各問題点を解決するものであり、
予め熱処理サイクルにしたがつて、炉内負圧が想
定される時間に排気筒上方に設けれ開閉弁を開放
し、同時に開口部に設けたリングバーナーに着火
して流入外気中の酸素の燃焼を図り、炉内雰囲気
の乱れ及び爆発等を防止とするとともに、迅速な
負圧回復を行なうとするものである。
This invention solves each of the above problems,
According to the heat treatment cycle in advance, at the time when negative pressure inside the furnace is expected, the on-off valve installed above the exhaust stack is opened, and at the same time, the ring burner installed at the opening is ignited to burn the oxygen in the inflowing outside air. This is intended to prevent turbulence in the furnace atmosphere, explosions, etc., and to quickly restore negative pressure.
本考案は上記問題点を解決するため、排気筒上
端を外方になだらかに彎曲及び起立させて太径部
が構成され、該太径部の内部には上記彎曲部に載
置する開閉弁が設けられ、該開閉弁中央に吊杆が
設けられ、排気筒側に略中央部を軸支した支持杆
の一端に上記吊杆が軸止めされ、他端に排気筒側
に設けたソレノイドのプランジヤーが連結され、
上記太径部上方には燃焼口を内方としたリングバ
ーナーが設けられ、上記ソレノイドによる開閉弁
の開放とリングバーナーの着火を同期させた構成
としたものである。
In order to solve the above-mentioned problems, the present invention has a large-diameter part formed by gently curving the upper end of the exhaust pipe outward and standing up, and an on-off valve placed on the curved part is installed inside the large-diameter part. A suspension rod is provided at the center of the opening/closing valve, the suspension rod is pivoted at one end of a support rod whose approximately central portion is pivotally supported on the exhaust pipe side, and the other end is a plunger of a solenoid provided on the exhaust pipe side. are connected,
A ring burner with a combustion port facing inward is provided above the large diameter portion, and the opening of the on-off valve by the solenoid is synchronized with the ignition of the ring burner.
本考案では炉内負圧が想定される場合、具体的
には被処理品の装入、移送等のため、入口扉、中
間扉、出口扉が各々開き、閉じはじめた時（扉開
のリミツトスイツチが外れた時）ソレノイドに通
電されてそのプランジヤーが引かれ、開閉弁が吊
上げられて開放される。
In this invention, when negative pressure inside the furnace is assumed, specifically when the inlet door, intermediate door, and outlet door open and begin to close (the door opening limit switch is When the solenoid is disconnected), the solenoid is energized and its plunger is pulled, lifting the on-off valve and opening it.
同時にリングバーナーに着火が行われ、流入外
気中の酸素が燃焼させられ炉内には酸素を含んだ
空気が流入することがなく、炉内雰囲気の乱れ及
び爆発等が防止されるものである。 At the same time, the ring burner is ignited and the oxygen in the inflowing outside air is combusted, so that no oxygen-containing air flows into the furnace, thereby preventing disturbances in the atmosphere inside the furnace and explosions.
もつとも、上記爆発は760℃以上の加熱処理室
では生せず、それ以下の温度となつた場合あるい
は焼入れベステイブル等でCOあるいはH2に一定
割合の空気が混合した場合に生ずるものである。 However, the explosion described above does not occur in a heat treatment chamber at temperatures above 760°C, but occurs when the temperature is lower than that, or when a certain proportion of air is mixed with CO or H 2 in quenched vestables, etc.
図面実施例のごとく、排気筒１の上端が外方に
なだらかに彎曲及び起立させられて太径部１ａが
構成される。
As in the embodiment shown in the drawings, the upper end of the exhaust pipe 1 is gently curved outward and raised to form a large diameter portion 1a.
つぎに、該太径部１ａの内部には上記彎曲部に
載置する開閉弁２が設けられる。さらに、該開閉
弁２中央には吊杆３が設けられる。 Next, an on-off valve 2 placed on the curved portion is provided inside the large diameter portion 1a. Further, a suspension rod 3 is provided at the center of the on-off valve 2.
なお、開閉弁２は吊杆３により上方を押えられ
ることなく上方にスライド自在とされ、炉内が必
要以上に加圧状態となつた場合に排ガスが自動排
出するよう構成されている。 The opening/closing valve 2 is configured to be able to slide upward without being pressed upwardly by the suspension rod 3, and to automatically discharge exhaust gas when the inside of the furnace becomes pressurized more than necessary.
つぎに、排気筒１側に略中央部を軸支４した支
持杆５の一端に上記吊杆３の一端が軸止め６さ
れ、他端に排気筒１側に設けたソレノイド７のプ
ランジヤー８が軸止め９により連結される。 Next, one end of the suspension rod 3 is fixed 6 to one end of a support rod 5 whose approximately central portion is supported 4 on the exhaust pipe 1 side, and a plunger 8 of a solenoid 7 provided on the exhaust pipe 1 side is attached to the other end. They are connected by a shaft stop 9.
さらに、上記太径部１ａ上方には燃焼口１０を
内方としたリングバーナー１１が設けられる。な
お、該リングバーナー１１にはソレノイドバルブ
１２を介してブタンガス等を適時に供給できるよ
う構成されている。 Furthermore, a ring burner 11 with a combustion port 10 located inside is provided above the large diameter portion 1a. Note that the ring burner 11 is configured to be able to supply butane gas or the like through a solenoid valve 12 in a timely manner.
そして、さらに、上記ソレノイド７による開閉
弁２の開放とリングバーナー１１の着火が同期さ
せられる。 Further, the opening of the on-off valve 2 by the solenoid 7 and the ignition of the ring burner 11 are synchronized.
すなわち、具体的にはパイロツトバーナー１３
が常時あるいは適宜に着火され、必要に応じてソ
レノイド７への通電とソレノイドバルブ１２への
通電が同時に行われるよう構成される。 That is, specifically, the pilot burner 13
The solenoid 7 is ignited at all times or as appropriate, and the solenoid 7 and the solenoid valve 12 are energized at the same time as necessary.
なお、ソレノイドバルブ１２への通電をソレノ
イド７への通電より少し早めてリングバーナー１
１を先に着火してもよい。 Note that the ring burner 1 is energized by energizing the solenoid valve 12 a little earlier than the energizing of the solenoid 7.
1 may be ignited first.
なお、上記開閉弁２の開放時間及びリングバー
ナー１１の着火時間はタイマー等で制御される。 Note that the opening time of the on-off valve 2 and the ignition time of the ring burner 11 are controlled by a timer or the like.
上記構成の本考案は炉内負圧の想定時間に開閉
弁２の開放とリングバーナー１１への着火を行え
ば各扉部のパツキン部分等から酸素を含んだ外気
が流入することがなく、炉内には酸素を含まず、
炉内雰囲気を乱すことのない外気が迅速に導入さ
れ、爆発等の危険もなく、炉内負圧を迅速に回復
させることができるものである。 In the present invention having the above structure, if the on-off valve 2 is opened and the ring burner 11 is ignited at the expected time of negative pressure inside the furnace, outside air containing oxygen will not flow into the furnace from the packing part of each door. It contains no oxygen,
Outside air can be quickly introduced without disturbing the atmosphere inside the furnace, and the negative pressure inside the furnace can be quickly restored without any risk of explosion or the like.
上記のごとく、本考案によれば、炉内負圧を迅
速に回復させ、各扉部のパツキン部分等から外気
（特に酸素）の吸い込み等による炉内雰囲気の乱
れ及び爆発等を防止できるものであり、特に変成
炉等を使用せず、供給するガス量が極めて少い雰
囲気炉に最適である効果を得ることができるもの
である。
As mentioned above, according to the present invention, the negative pressure inside the furnace can be quickly restored, and it is possible to prevent disturbances in the atmosphere inside the furnace and explosions due to the intake of outside air (particularly oxygen) from the gaskets of each door. In particular, it is possible to obtain an effect that is most suitable for an atmospheric furnace that does not use a shift furnace or the like and requires an extremely small amount of gas to be supplied.
図面は本考案の一実施例を示すもので、第１図
は一部切欠斜視図、第２図は開閉弁の閉じ状態を
示す一部切欠正面図、第３図は開閉弁の開放状態
を示す一部切欠正面図である。
１……排気筒、１ａ……太径部、２……開閉
弁、３……吊杆、４……軸支、５……支持杆、７
……ソレノイド、８……プランジヤー。
The drawings show one embodiment of the present invention; Fig. 1 is a partially cutaway perspective view, Fig. 2 is a partially cutaway front view showing the on-off valve in the closed state, and Fig. 3 is a partially cutaway front view showing the on-off valve in the open state. It is a partially cutaway front view shown. 1...Exhaust pipe, 1a...Large diameter part, 2...Opening/closing valve, 3...Hanging rod, 4...Spindle support, 5...Support rod, 7
...Solenoid, 8...Plunger.
Claims (1)
せて太径部が構成され、該太径部の内部には上記
彎曲部に載置する開閉弁が設けられ、該開閉弁中
央に吊杆が設けられ、排気筒側に略中央部を軸支
した支持杆の一端に上記吊杆が軸止めされ、他端
に排気筒側に設けたソレノイドのプランジヤーが
連結され、上記太径部上方には燃焼口を内方とし
たリングバーナーが設けられ、上記ソレノイドに
よる開閉弁の開放とリングバーナーの着火を同期
させたことを特徴とする雰囲気炉の炉圧調整装
置。 A large diameter part is formed by gently curving the upper end of the exhaust pipe outward and standing up; an on-off valve placed on the curved part is provided inside the large diameter part, and a hanging rod is provided in the center of the on-off valve. The hanging rod is fixed to one end of a support rod which has a substantially central portion pivotally supported on the exhaust pipe side, and the plunger of a solenoid provided on the exhaust pipe side is connected to the other end. 1. A furnace pressure adjustment device for an atmospheric furnace, characterized in that a ring burner with a combustion port facing inward is provided, and the opening of the on-off valve by the solenoid and the ignition of the ring burner are synchronized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12015985U JPH0116766Y2 (en) | 1985-08-05 | 1985-08-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12015985U JPH0116766Y2 (en) | 1985-08-05 | 1985-08-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6228868U JPS6228868U (en) | 1987-02-21 |
| JPH0116766Y2 true JPH0116766Y2 (en) | 1989-05-17 |
Family
ID=31008217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12015985U Expired JPH0116766Y2 (en) | 1985-08-05 | 1985-08-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0116766Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4950334A (en) * | 1986-08-12 | 1990-08-21 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Gas carburizing method and apparatus |
| JP2683908B2 (en) * | 1988-03-31 | 1997-12-03 | 同和鉱業株式会社 | Atmosphere oxidation prevention method |
-
1985
- 1985-08-05 JP JP12015985U patent/JPH0116766Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6228868U (en) | 1987-02-21 |
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