JPH0255016B2 - - Google Patents
Info
- Publication number
- JPH0255016B2 JPH0255016B2 JP61114430A JP11443086A JPH0255016B2 JP H0255016 B2 JPH0255016 B2 JP H0255016B2 JP 61114430 A JP61114430 A JP 61114430A JP 11443086 A JP11443086 A JP 11443086A JP H0255016 B2 JPH0255016 B2 JP H0255016B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- shaft sealing
- shaft
- fluid
- steam
- 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 - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims description 69
- 239000012530 fluid Substances 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 24
- 238000009833 condensation Methods 0.000 claims description 22
- 230000005494 condensation Effects 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
Landscapes
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Mechanical Sealing (AREA)
- Dairy Products (AREA)
- Confectionery (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はメカニカルシールが内蔵された軸封室
に蒸気と温水との気液混合高温軸封流体を軸封さ
れる軸封装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a shaft sealing device in which a high-temperature shaft sealing fluid, a gas-liquid mixture of steam and hot water, is sealed in a shaft sealing chamber in which a mechanical seal is built-in.
（従来の技術）
従来、例えばチヨコレートやクリームのような
食品用の撹拌槽及び発酵用撹拌槽等の軸封装置に
おいて、メカニカルシールを内蔵した軸封室を確
実に軸封するだけでなく、軸封部の殺菌を行う必
要があるため、軸封流体として蒸気と温水との気
液混合高流流体が使用される。(Prior art) Conventionally, in shaft sealing devices for stirring tanks for food products such as tyokolate and cream, stirring tanks for fermentation, etc., in addition to reliably sealing the shaft sealing chamber with a built-in mechanical seal, Since it is necessary to sterilize the sealing part, a high-flow gas-liquid mixed fluid of steam and hot water is used as the shaft sealing fluid.
ところで、前記高温の軸封流体によつて軸封を
行う場合、当然、軸封流体を常時殺菌可能な高温
領域（100℃近傍）に保持しなければならない。 By the way, when sealing the shaft using the high-temperature shaft sealing fluid, it is natural that the shaft sealing fluid must be maintained at a high temperature range (near 100° C.) where it can be sterilized at all times.
このように、軸封流体の温度を高温保持しなが
ら軸封するために、従来、軸封室内の流体温度を
温度センサによつて検出し、この検出信号を温度
調節器に入力し、該温度調節器の制御設定温度に
基づく出力信号に応じて、軸封流体供給系に介設
した電磁弁を開放し、高温の軸封流体を軸封室に
送り込んで軸封室の流体を殺菌可能な温度領域に
保持するように制御される軸封装置が知られてい
る。 In this way, in order to seal the shaft while maintaining the temperature of the shaft sealing fluid at a high temperature, conventionally the fluid temperature in the shaft sealing chamber is detected by a temperature sensor, this detection signal is input to a temperature controller, and the temperature is adjusted. In response to the output signal based on the controller's control setting temperature, a solenoid valve installed in the shaft sealing fluid supply system is opened, and high temperature shaft sealing fluid is sent into the shaft sealing chamber to sterilize the fluid in the shaft sealing chamber. A shaft seal device that is controlled to be maintained within a temperature range is known.
（発明が解決しようとする問題点）
しかし、前記従来の軸封装置では、軸封流体を
殺菌可能な高温領域に常時保持するのに温度セン
サ、温度調節器及び電磁弁等の制御機器類が必要
であり、かつ、これらの制御機器類を電気的に導
通制御する大掛りな制御回路を必要とし、制御系
が複雑化され高価格化する問題点を有している。(Problems to be Solved by the Invention) However, in the conventional shaft sealing device, control equipment such as a temperature sensor, a temperature controller, and a solenoid valve are required to constantly maintain the shaft sealing fluid in a high temperature region where it can be sterilized. In addition, it requires a large-scale control circuit to electrically control the conduction of these control devices, which poses the problem of complicating the control system and increasing its cost.
本発明は、このような従来技術の問題点を解決
するためになされたもので、制御系の簡略化と低
価格化が達成され、しかも確実な温度管理を実現
することができる気液混合高温軸封流体による軸
封装置を提供することを目的とする。 The present invention has been made in order to solve the problems of the conventional technology, and is a gas-liquid mixed high-temperature system that simplifies the control system and lowers the cost, and also realizes reliable temperature control. An object of the present invention is to provide a shaft sealing device using a shaft sealing fluid.
（問題点を解決するための手段）
本発明に係る軸封装置は、上記目的を達成する
ために、蒸気供給源と、この蒸気供給源から蒸気
が導入される軸封室と、この軸封室に温水還流路
を介して連通する凝縮タンクとを設けた軸封経路
を有し、前記凝縮タンクに温度調整トラツプを備
えてなり、前記軸封室が前記凝縮タンクから還流
された高温温水と前記蒸気供給源から導入される
蒸気との気液混合状態で高温軸封され、前記軸封
経路の流体温度を前記温度調整トラツプで検出し
て該温度調整トラツプがその制御設定温度に準じ
て開閉作動されるとともに、前記温度調整トラツ
プの開放時に、前記軸封経路の蒸気流通により軸
封経路内の流体温度が高温回復されるとともに、
前記温度調整トラツプの閉止時に前記流体の流通
と排出とが停止されるように構成してなる。(Means for Solving the Problems) In order to achieve the above object, the shaft sealing device according to the present invention includes a steam supply source, a shaft sealing chamber into which steam is introduced from the steam supply source, and a shaft sealing device for the shaft sealing device. It has a shaft sealing path that includes a condensation tank that communicates with the chamber via a hot water return path, and the condensation tank is equipped with a temperature adjustment trap, and the shaft sealing chamber is connected to the high temperature hot water returned from the condensation tank. A high-temperature shaft is sealed in a gas-liquid mixed state with steam introduced from the steam supply source, and the temperature adjustment trap detects the fluid temperature in the shaft sealing path, and the temperature adjustment trap opens and closes according to the control set temperature. When the temperature adjustment trap is opened, the temperature of the fluid in the shaft seal path is restored to a high temperature by the steam flow in the shaft seal path, and
The structure is configured such that the flow and discharge of the fluid are stopped when the temperature regulating trap is closed.
（作用）
本発明によれば、凝縮タンクに対応する温度調
整トラツプの開閉作動によつて、軸封経路内の軸
封流体が常時殺菌可能な高温領域に保持される。(Function) According to the present invention, the shaft seal fluid in the shaft seal path is maintained at a high temperature region where it can be sterilized at all times by opening and closing the temperature adjustment trap corresponding to the condensation tank.
（実施例）
図面は、本発明にかかる軸封装置の系統説明図
であり、図において１は撹拌槽で、内部に収容さ
れる食品等が撹拌機２の撹拌羽根２ａで撹拌さ
れ、この撹拌羽根２ａを取り付けた回転軸２ｂが
メカニカルシール（図示せず）を内蔵した軸封室
３を貫通し、この軸封室３に供給される軸封流体
によつて軸封される。(Example) The drawing is an explanatory diagram of the system of the shaft sealing device according to the present invention. A rotating shaft 2b with a blade 2a attached thereto passes through a shaft sealing chamber 3 containing a mechanical seal (not shown), and is sealed by a shaft sealing fluid supplied to the shaft sealing chamber 3.
軸封室３には、蒸気供給通路４を介して蒸気供
給源５から蒸気が供給される。即ち、弁体６（例
えば球形弁）を開放することで、ストレーナ７で
濾過された高温の蒸気が軸封室３に導入される。
蒸気供給通路４のストレーナ７の下流にレベルゲ
ージ８を設けたタンク９が介設され、蒸気供給通
路４で発生する凝結水を留め、この凝結水の貯溜
状態を、レベルゲージ８で目視判断して適ドレン
排出弁１０を開弁し、これにより蒸気供給通路４
の凝結水を排出する。 Steam is supplied to the shaft sealing chamber 3 from a steam supply source 5 via a steam supply passage 4 . That is, by opening the valve body 6 (for example, a spherical valve), high-temperature steam filtered by the strainer 7 is introduced into the shaft sealing chamber 3.
A tank 9 equipped with a level gauge 8 is interposed downstream of the strainer 7 in the steam supply passage 4 to retain condensed water generated in the steam supply passage 4, and visually judge the state of accumulation of this condensed water using the level gauge 8. to open the appropriate drain discharge valve 10, thereby opening the steam supply passage 4.
Drain the condensed water.
軸封室３は弁体１１（例えば球形弁）を介設し
た温水還流路１２を介して凝縮タンク１３の底部
に連通している。該凝結タンク１３はレベルゲー
ジ１４を有し、温度計１５を装備している。 The shaft sealing chamber 3 communicates with the bottom of the condensation tank 13 via a hot water return path 12 with a valve body 11 (for example, a spherical valve) interposed therein. The condensation tank 13 has a level gauge 14 and is equipped with a thermometer 15.
凝縮タンク１３の上部は弁体１６（例えば球形
弁）を介設した制御通路１７を介して温度調整ト
ラツプ１８に連通している。そして、制御通路１
７のドレン排出通路１９が分岐形成されている。
つまり、制御通路１７の凝結水はドレン排出通路
１９に介設した排出弁２０を開放することで排出
される。２１は圧力表示計で、弁体２２を介して
凝縮タンク１３の上蓋１３ａを貫通して取り付け
られている。そして、軸封室３の上部と凝縮タン
ク１３の上部近傍はエア抜き通路２３によつて連
通されており、凝縮タンク１３の上蓋１３ａを貫
通して取り付けられた排気通路２４に介設されて
いる排気弁２５を開放することにより、軸封室３
及び凝縮タンク１３のエア抜きがなされる。 The upper part of the condensing tank 13 communicates with a temperature regulating trap 18 via a control channel 17 with a valve body 16 (for example a spherical valve) interposed therein. And control passage 1
7 drain discharge passages 19 are formed into branches.
That is, the condensed water in the control passage 17 is discharged by opening the discharge valve 20 provided in the drain discharge passage 19. Reference numeral 21 denotes a pressure indicator, which is attached to the condensation tank 13 through a valve body 22 through the upper cover 13a. The upper part of the shaft sealing chamber 3 and the vicinity of the upper part of the condensation tank 13 are communicated with each other by an air vent passage 23, which is interposed in an exhaust passage 24 attached to the upper cover 13a of the condensation tank 13. By opening the exhaust valve 25, the shaft sealing chamber 3
And the air in the condensation tank 13 is vented.
また、凝縮タンク１３の底部を貫通して低温温
水排出弁２６を介設した排水通路２７が設けられ
ている。 Further, a drainage passage 27 is provided that penetrates the bottom of the condensation tank 13 and has a low-temperature hot water discharge valve 26 interposed therein.
次に、上記の軸封装置の作用を具体的に説明す
る。 Next, the operation of the shaft sealing device described above will be specifically explained.
蒸気供給通路４の弁体６を開弁状態に保持し
て、蒸気供給源５から高温の蒸気を軸封室３に導
入する。 The valve body 6 of the steam supply passage 4 is held in an open state, and high temperature steam is introduced into the shaft sealing chamber 3 from the steam supply source 5.
軸封室３に導入された蒸気は、開弁状態に保持
した弁体１１を介設している温水還流路１２を通
つて凝縮タンク１３内に導かれ、該タンク内で凝
結した温水が温水還流路１２を通つて軸封室３に
還流される。即ち、軸封経路に高温の軸封流体が
充満する。したがつて、図示されないメカニカル
シールを内蔵した軸封室３は蒸気と温水とよりな
る軸封流体、つまり気液混合高温軸封流体により
軸封され、軸封部の殺菌がなされる。 The steam introduced into the shaft sealing chamber 3 is guided into the condensation tank 13 through the hot water return path 12 interposed with the valve body 11 held in an open state, and the hot water condensed in the tank is converted into hot water. It is refluxed into the shaft sealing chamber 3 through the reflux path 12. That is, the shaft sealing path is filled with high temperature shaft sealing fluid. Therefore, the shaft sealing chamber 3 containing a mechanical seal (not shown) is sealed with a shaft sealing fluid made of steam and hot water, that is, a high-temperature shaft sealing fluid mixed with gas and liquid, and the shaft sealing portion is sterilized.
軸封室３に蒸気及び温水が導入されることで、
軸封室３に既存の空気は、エア抜き通路２３を通
つて凝縮タンク１３に導かれ、また凝縮タンク１
３内の空気は、凝縮タンク１３内の圧力が所定値
に達した時点で排気弁２５が開弁されることによ
り排気通路２４を通つて排気がなされる。勿論、
圧の表示計２１の目盛を読み取つて、圧力値の確
認がなされることはいうまでもない。 By introducing steam and hot water into the shaft sealing chamber 3,
The air existing in the shaft sealing chamber 3 is led to the condensation tank 13 through the air vent passage 23, and
The air in the condensing tank 13 is exhausted through the exhaust passage 24 by opening the exhaust valve 25 when the pressure in the condensing tank 13 reaches a predetermined value. Of course,
Needless to say, the pressure value is confirmed by reading the scale of the pressure indicator 21.
制御通路１７を介して温度調整トラツプ１８に
導かれている流体温度、つまり軸封経路における
凝縮タンク１３内の流体温度が、温度調整トラツ
プ１８の設定温度（例えば110℃）以下に低下す
ると、温度調整トラツプ１８がこの状態を検出し
て開放され、温度調整トラツプ１８を通つて、設
定温度以下になつた流体が排出される。 When the temperature of the fluid led to the temperature adjustment trap 18 via the control passage 17, that is, the temperature of the fluid in the condensation tank 13 in the shaft sealing path, falls below the set temperature of the temperature adjustment trap 18 (for example, 110°C), the temperature Regulating trap 18 detects this condition and is opened, allowing the fluid below the set temperature to be discharged through temperature regulating trap 18.
したがつて、蒸気供給源５から前述の軸封経
路、つまり軸封室３及び凝縮タンク１３にそれぞ
れ高温の蒸気が新たに流入し、この流通過程にお
いて軸封室３と凝縮タンク１３の流体温度を高温
に回復させる。 Therefore, high-temperature steam newly flows from the steam supply source 5 into the aforementioned shaft sealing path, that is, the shaft sealing chamber 3 and the condensing tank 13, and during this flow process, the fluid temperature in the shaft sealing chamber 3 and the condensing tank 13 decreases. to return to high temperature.
温度調整トラツプ１８が開放し、軸封室３及び
凝縮タンク１３に高温蒸気が流通して、軸封経路
内の流体温度が高温回復し、前記温度調整トラツ
プ１８の制御設定温度を超えると、温度調整トラ
ツプ１８は、閉成する。 When the temperature adjustment trap 18 opens and high-temperature steam flows into the shaft sealing chamber 3 and condensation tank 13, the fluid temperature in the shaft sealing path recovers to a high temperature and exceeds the control set temperature of the temperature adjustment trap 18. Regulating trap 18 is closed.
以後、凝縮タンク１３内の流体温度の変動に応
じて前述の作動が反復される。 Thereafter, the above-described operation is repeated in response to fluctuations in the fluid temperature within the condensation tank 13.
したがつて、軸封室３を、常時、気液混合高温
軸封流体により軸封して殺菌可能な高温領域に保
持することができる。 Therefore, the shaft sealing chamber 3 can always be kept in a high-temperature region where it can be sealed and sterilized by the gas-liquid mixed high-temperature shaft sealing fluid.
なお、凝縮タンク１３の底部を貫通して設けら
れている排水通路２７の低温温水排出弁２６を、
温度調整トラツプ１８の開閉作動に同期する電磁
弁で構成しておけば、低温温水排出時や、凝縮タ
ンク１３内の流体の高温回復が更に積極的になし
得ることもできる。 Note that the low temperature hot water discharge valve 26 of the drainage passage 27 provided through the bottom of the condensation tank 13 is
If it is configured with a solenoid valve that synchronizes with the opening/closing operation of the temperature adjustment trap 18, it is possible to more actively discharge low-temperature hot water and restore the fluid in the condensation tank 13 to a high temperature.
（発明の効果）
以上説明したように、本発明によれば、軸封室
を軸封する蒸気と温水との気液混合高温軸封流体
を殺菌可能な高温領域に保持する制御が、凝縮タ
ンクに対応する温度調整トラツプの開閉によつ
て、凝縮タンクから低温温水を排出することによ
りなされるから、従来の軸封装置と比較して制御
系の著しい簡略化と、これに伴なう低価格化が達
成され、しかも確実な温度管理下において軸封を
行うことができる。(Effects of the Invention) As explained above, according to the present invention, the control for maintaining the high-temperature shaft sealing fluid, which is a gas-liquid mixture of steam and hot water that seals the shaft sealing chamber, in a high-temperature region where sterilization is possible is carried out in the condensing tank. This is done by discharging low-temperature hot water from the condensing tank by opening and closing the corresponding temperature adjustment trap, which simplifies the control system significantly compared to conventional shaft sealing devices, and reduces costs accordingly. In addition, shaft sealing can be performed under reliable temperature control.
図面は本発明にかかる軸封装置の系統説明図で
ある。
３……軸封室、５……蒸気供給源、１２……温
水還流路、１３……凝縮タンク、１８……温度調
整トラツプ、２６……低温温水排出弁。
The drawing is a system explanatory diagram of the shaft sealing device according to the present invention. 3... Shaft sealed chamber, 5... Steam supply source, 12... Hot water return path, 13... Condensation tank, 18... Temperature adjustment trap, 26... Low temperature hot water discharge valve.
Claims (1)
と温水との気液混合高温軸封流体を軸封させる軸
封装置であつて、蒸気供給源と、この蒸気供給源
から蒸気が導入される軸封室と、この軸封室に温
水環流路を介して連通する凝縮タンクとを設けた
軸封経路を有し、前記凝縮タンクに温度調整トラ
ツプを備えてなり、前記軸封室が前記凝縮タンク
から還流された高温温水と前記蒸気供給源から導
入される蒸気との気液混合状態で高温軸封され、
前記軸封経路の流体温度を前記温度調整トラツプ
で検出して該温度調整トラツプがその制御設定温
度に準じて開閉作動されるとともに、前記温度調
整トラツプの開放時に、前記軸封経路の蒸気流通
により軸封経路内の流体温度が高温回復されると
ともに、前記温度調整トラツプの閉止時に前記流
体の流通と排出とが停止されるように構成してな
ることを特徴とする気液混合高温軸封流体による
軸封装置。1 A shaft sealing device that seals a high-temperature shaft sealing fluid, a vapor-liquid mixture of steam and hot water, in a shaft sealing chamber with a built-in mechanical seal, which comprises a steam supply source and a shaft into which steam is introduced from the steam supply source. The shaft sealing path includes a sealed chamber and a condensation tank communicating with the shaft sealed chamber via a hot water circulation path, the condensation tank is equipped with a temperature adjustment trap, and the shaft sealed chamber is connected to the condensation tank. The high-temperature shaft is sealed in a gas-liquid mixed state of high-temperature hot water refluxed from the steam supply source and steam introduced from the steam supply source,
The fluid temperature in the shaft seal path is detected by the temperature adjustment trap, and the temperature adjustment trap is opened and closed according to the control set temperature, and when the temperature adjustment trap is opened, the temperature adjustment trap is opened and closed by the steam flow in the shaft seal path. A gas-liquid mixed high-temperature shaft sealing fluid, characterized in that the temperature of the fluid in the shaft sealing path is restored to a high temperature, and the flow and discharge of the fluid are stopped when the temperature adjustment trap is closed. Shaft sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114430A JPS62269643A (en) | 1986-05-19 | 1986-05-19 | Shaft-sealing apparatus by high-temperature shaft-sealing fluid composed of mixture of gas and liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114430A JPS62269643A (en) | 1986-05-19 | 1986-05-19 | Shaft-sealing apparatus by high-temperature shaft-sealing fluid composed of mixture of gas and liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62269643A JPS62269643A (en) | 1987-11-24 |
| JPH0255016B2 true JPH0255016B2 (en) | 1990-11-26 |
Family
ID=14637520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61114430A Granted JPS62269643A (en) | 1986-05-19 | 1986-05-19 | Shaft-sealing apparatus by high-temperature shaft-sealing fluid composed of mixture of gas and liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62269643A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420917U (en) * | 1990-06-13 | 1992-02-21 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3839432B2 (en) * | 2003-10-30 | 2006-11-01 | 株式会社神鋼環境ソリューション | Contamination-resistant shaft seal device |
-
1986
- 1986-05-19 JP JP61114430A patent/JPS62269643A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420917U (en) * | 1990-06-13 | 1992-02-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62269643A (en) | 1987-11-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4394139A (en) | Direct contact condenser and separating method | |
| US4722321A (en) | Apparatus for the heat treatment of foods or meals with a sensor tube | |
| KR970028871A (en) | Treatment liquid supply method and treatment liquid supply device | |
| GB1480786A (en) | Respiratory humidifier | |
| US4111654A (en) | Autoclave apparatus and method for sterilization of articles | |
| US4539903A (en) | Filling apparatus | |
| US3967494A (en) | Method and apparatus for detecting entrapped air in a steam sterilizer | |
| JPH0255016B2 (en) | ||
| ATE9402T1 (en) | SOLAR HEATING SYSTEM AND VALVE. | |
| US5026524A (en) | Apparatus for subjecting a load to a constant temperature below 100° | |
| GB892277A (en) | Continuous digester | |
| US2665628A (en) | Apparatus for treating liquids | |
| US3831619A (en) | Apparatus for accurately maintaining small underpressures in a tank system which is connected to a gas suction installation | |
| US2343317A (en) | Apparatus for governing deaeration | |
| JPS57104664A (en) | Gasification method for liquid source | |
| JP2840910B2 (en) | Steam heating device | |
| JPH0251263U (en) | ||
| KR20230001885A (en) | A distillation type oxygen water production device capable of continuous production | |
| US4288404A (en) | Apparatus for automatically stabilizing a process of thermal treatment of liquid media | |
| CN209416807U (en) | A kind of asphalt test sample preparation device | |
| US4346673A (en) | Apparatus and method for metering and controlling a feed of hydrogen fluoride vapor | |
| CN109540647A (en) | A kind of asphalt test sample preparation device | |
| GB1332116A (en) | Kiln drying | |
| US1385631A (en) | Device for controlling pressure-processing | |
| GB726452A (en) | Heat treatment of liquids |