JPH0269696A - Device for sealing rotating body shaft for reprocessing facility - Google Patents
Device for sealing rotating body shaft for reprocessing facilityInfo
- Publication number
- JPH0269696A JPH0269696A JP63220392A JP22039288A JPH0269696A JP H0269696 A JPH0269696 A JP H0269696A JP 63220392 A JP63220392 A JP 63220392A JP 22039288 A JP22039288 A JP 22039288A JP H0269696 A JPH0269696 A JP H0269696A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- slab
- rotating body
- liquid
- radiation
- 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.)
- Pending
Links
- 238000012958 reprocessing Methods 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 title claims description 9
- 239000007788 liquid Substances 0.000 claims abstract description 19
- 230000005855 radiation Effects 0.000 claims abstract description 14
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000007598 dipping method Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 description 18
- 230000000694 effects Effects 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002915 spent fuel radioactive waste Substances 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 229910052770 Uranium Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000622 liquid--liquid extraction Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- -1 mercury and gallium Chemical class 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Landscapes
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Extraction Or Liquid Replacement (AREA)
- Centrifugal Separators (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的］
（産業上の利用分野）
本発明は使用済核燃料の再処理施設で使用される例えば
遠心抽出機の縦形回転ボウルの軸シール装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a shaft sealing device for a vertical rotating bowl of a centrifugal extractor used in a spent nuclear fuel reprocessing facility, for example.
（従来の技術）
使用済核燃料の再処理施設においては例えばウランおよ
びプルトニウムを溶媒抽出するために第４図に示したよ
うな遠心抽出機が使用されている。(Prior Art) In spent nuclear fuel reprocessing facilities, for example, a centrifugal extractor as shown in FIG. 4 is used to extract uranium and plutonium with a solvent.
すなわち、第４図において、符号１はコンクリート製放
射線遮蔽スラブで、このスラブ１を境界として、その上
部に回転駆動部２と、下部に縦形回転体部３とに区分さ
れている。回転駆動部２はハウジング４の上部に駆動モ
ータ５が載置され、このモータ５にはカップリング６を
介して細長い回転軸７が接続されている。ハウジング４
内に位置している軸７の側面は上軸受８と下軸受９で抱
持され、これらの軸受８，９はボックス１０に支持され
ている。またスラブ１の上面とボックス１０の下端との
間にはベロー１１が介在されている。このベロー１１に
は送気システムとして気体の供給管１２が接続され、気
体は矢印方向に流される。一方、縦形回転体部３はスラ
ブ１を貫通した割７に接続した回転体としての回転ボウ
ル１３と、この回転ボウル１３を包囲したケーシング１
４とを備えている。That is, in FIG. 4, reference numeral 1 denotes a radiation shielding slab made of concrete, which is divided into a rotary drive section 2 at the upper part and a vertical rotating body section 3 at the lower part, with this slab 1 as a boundary. In the rotary drive section 2, a drive motor 5 is mounted on the upper part of a housing 4, and an elongated rotation shaft 7 is connected to the motor 5 via a coupling 6. housing 4
The side surface of the shaft 7 located inside is held by an upper bearing 8 and a lower bearing 9, and these bearings 8 and 9 are supported by a box 10. Further, a bellows 11 is interposed between the upper surface of the slab 1 and the lower end of the box 10. A gas supply pipe 12 is connected to the bellows 11 as an air supply system, and gas is caused to flow in the direction of the arrow. On the other hand, the vertical rotating body part 3 includes a rotating bowl 13 as a rotating body connected to a split 7 passing through the slab 1, and a casing 1 surrounding this rotating bowl 13.
4.
ケーシング１４の上部はスラブ１の下面に固定され、ケ
ーシング１４の下部には重液排出管１５と軽液排出管１
６が接続され、また内側部には重液相と軽液相とを区隔
する仕切り筒１７が設けられている。回転ボウル１３の
上部から重液相供給ノズル１８と軽液相供給ノズル１９
が挿入され、これらのノズル１８．１９の細端はケーシ
ング１４を貫通してそれぞれ図示していないタンクに接
続される。また、回転ボウル１３の上部側面には軽液相
流出孔２０が、一方正部側面には重液相流出孔２１がそ
れぞれ設けられている。The upper part of the casing 14 is fixed to the lower surface of the slab 1, and the lower part of the casing 14 has a heavy liquid discharge pipe 15 and a light liquid discharge pipe 1.
6 is connected, and a partition cylinder 17 is provided on the inner side to separate a heavy liquid phase and a light liquid phase. A heavy liquid phase supply nozzle 18 and a light liquid phase supply nozzle 19 are inserted from the top of the rotating bowl 13.
are inserted, and the narrow ends of these nozzles 18, 19 pass through the casing 14 and are respectively connected to a tank (not shown). Further, a light liquid phase outflow hole 20 is provided on the upper side surface of the rotating bowl 13, and a heavy liquid phase outflow hole 21 is provided on the front side surface.
しかして、上記構成の遠心式抽出機はモータ５を駆動し
、軸７の回転によって回転ボウル１３が回転する。そこ
で、重液相供給ノズル１８と軽液相供給ノズル１９から
それぞれ抽料および抽出剤を回転ボウル１３へ流入し液
々抽出を行う。この操作で液々抽出された組成の重液相
は下部の重液相排出管１５から流出する。一方、軽液相
は上部から仕切り筒１７とケーシング１４との間を流れ
軽液相排出管１６から流出する。Thus, in the centrifugal extractor having the above configuration, the motor 5 is driven, and the rotary bowl 13 is rotated by the rotation of the shaft 7. Therefore, the extraction material and the extractant flow into the rotating bowl 13 from the heavy liquid phase supply nozzle 18 and the light liquid phase supply nozzle 19, respectively, and liquid-liquid extraction is performed. The heavy liquid phase having the composition extracted in liquid by this operation flows out from the lower heavy liquid phase discharge pipe 15. On the other hand, the light liquid phase flows from the upper part between the partition tube 17 and the casing 14 and flows out from the light liquid phase discharge pipe 16.
ここで、軸７とスラブ１との間に隙間２２が必然的に生
じている。この隙間２２から抽料中の放射能の漏洩を防
止するためベロー１１を設け、かつ供給管１２から気体
を流し、軸シールしている。すなわち、軸７とスラブ１
との軸シールは供給管１２から気体を送気し、放射線レ
ベルの低い方（アンバーゾーンと云う）から高い方（レ
ッドゾーンと云う）へ空気が流れるようにした送気シス
テムを採り、この送気システムで放射能の漏洩を防止し
ている。Here, a gap 22 is inevitably created between the shaft 7 and the slab 1. A bellows 11 is provided to prevent radioactivity in the extracted material from leaking through this gap 22, and gas is flowed through the supply pipe 12 to seal the shaft. That is, shaft 7 and slab 1
The shaft seal uses an air supply system that supplies gas from the supply pipe 12 and allows the air to flow from the area with lower radiation levels (called the amber zone) to the area with higher radiation levels (called the red zone). The air system prevents the leakage of radioactivity.
（発明が解決しようとする課題）
再処理施設で縦形回転機器を用いる場合、上記した従来
技術による縦形回転ボウルを有する遠心抽出機では軸と
静止部との間で放射能の漏洩を防止するために、アンバ
ーゾーンからレッドゾーンへ気体を流入さぜる送気シス
テムを採用している。(Problems to be Solved by the Invention) When using vertical rotating equipment in a reprocessing facility, the above-mentioned conventional centrifugal extractor with a vertical rotating bowl has a problem in order to prevent leakage of radioactivity between the shaft and the stationary part. In addition, an air supply system is used that circulates gas from the amber zone to the red zone.
この送気システムはコスト、メンテナンス性。This air supply system is low cost and easy to maintain.
安全性などの点で問題がある。There are problems in terms of safety, etc.
本発明は上記のような事情に鑑みなされたもので、送気
システムを採ることなく、再処理用機器として良好なメ
ンテナンス性と信頼性を持ち、かつ低コストの再処理施
設用回転体の軸シール装置を提供することを目的とする
。The present invention was made in view of the above-mentioned circumstances, and it provides a rotor shaft for reprocessing facilities that does not require an air supply system, has good maintainability and reliability as reprocessing equipment, and is low cost. The purpose is to provide a sealing device.
［発明の構成］
（課題を解決するための手段）
本発明は放射線遮蔽スラブを境界として上下に区分され
、そのスラブの上部に回転駆動部が、該スラブの下部に
該回転駆動部の軸に接続して回転する縦形回転体が設け
られ、該軸と該スラブとの隙間をシールする再処理施設
用回転体の軸シール装置において、前記スラブの上面に
円環状容器を設け、この容器内に耐放射性液体を収容し
、この液体内にその先端部が没入されるように前記軸に
口字状円板を取着してなることを特徴とする。[Structure of the Invention] (Means for Solving the Problems) The present invention is divided into upper and lower parts with a radiation shielding slab as a boundary, a rotary drive section is provided in the upper part of the slab, and a rotary drive part is attached to the shaft of the rotary drive part in the lower part of the slab. In a shaft sealing device for a rotary body for a reprocessing facility, which is provided with a vertical rotary body that connects and rotates, and seals a gap between the shaft and the slab, an annular container is provided on the upper surface of the slab, and a ring-shaped container is provided in the container. It is characterized by containing a radiation-resistant liquid and having a mouth-shaped disc attached to the shaft so that its tip is immersed in the liquid.
（作 用）
軸に取着された一字状円板の先端部周囲が環状容器内の
液体中に完全に浸るように没入している。(Function) The circumference of the tip of the linear disc attached to the shaft is completely immersed in the liquid in the annular container.
したがって、軸が回転中は円板も液体中で回転し、この
円板と液体とでスラブの上下部空間がしゃ断され、スラ
ブの上下部には気体の流通を生じさせない。よって、ス
ラブを境界としたアンバーゾーンとレッドゾーンとを完
全に軸シールできる。このため、従来のように送気シス
テムの供給管から常に気体を流して軸シールする必要が
なく、運転コスト、メンテナンス性、安全性の点で大き
な効果を秦する。Therefore, while the shaft is rotating, the disc also rotates in the liquid, and the upper and lower spaces of the slab are cut off by this disc and the liquid, so that gas does not flow between the upper and lower parts of the slab. Therefore, it is possible to completely seal the amber zone and the red zone with the slab as a boundary. For this reason, there is no need to constantly flow gas from the supply pipe of the air supply system to seal the shaft as in the past, and this has great effects in terms of operating costs, ease of maintenance, and safety.
（実施例）
本発明に係る軸シール装置の一実施例を第１図を参照し
なから説明する。なお、第４図と同一部分には同一符号
で示し重複する部分の説明を省略する。(Embodiment) An embodiment of the shaft seal device according to the present invention will be described with reference to FIG. Note that the same parts as in FIG. 4 are designated by the same reference numerals, and the explanation of the overlapping parts will be omitted.
本発明が従来例と異なる点は従来例の送気システムとし
てのベロー１１および気体の供給管１２を削除し、その
代りにスラブ１の上面に円環状容器２３を設け、この容
器２３内に耐放射性液体２４を収容し、この液体２４内
にその先端部が完全に没入されるように軸７に口字状円
板２５を取着したことにある。The difference between the present invention and the conventional example is that the bellows 11 and gas supply pipe 12 as the air supply system of the conventional example are deleted, and instead, an annular container 23 is provided on the upper surface of the slab 1, and a A mouth-shaped disk 25 is attached to the shaft 7 so that a radioactive liquid 24 is contained and the tip thereof is completely immersed in the liquid 24.
この円板２５と液体２４によってスラブ１を隔界とする
アンバーゾーンとレッドゾーンに完全隔離される。The disc 25 and the liquid 24 completely isolate the zone into an amber zone and a red zone with the slab 1 as a boundary.
しかして、’１１１７に取着した円板２５とスラブ１に
設けた容器２３内の液体２４によってアンバーゾーンと
レッドゾーンの軸シールを行うことができる。Thus, the axial seal between the amber zone and the red zone can be achieved by the disk 25 attached to the '1117 and the liquid 24 in the container 23 provided in the slab 1.
そのため、軸７とスラブ１との隙間２２を流体シールで
き、オイルシールまたはメカニカルシールなどのように
軸７の運動を妨げることなく気密の保持を確実に行うこ
とができる。Therefore, the gap 22 between the shaft 7 and the slab 1 can be fluidly sealed, and airtightness can be reliably maintained without interfering with the movement of the shaft 7 unlike an oil seal or a mechanical seal.
第２図は第１図に於けるスラブ１と軸７との隙間２２に
位置した部分の軸７にネジ溝２６を設けた例を示してい
る。この例によれば＠７が回転することによる流体り学
的作用によってアンバーゾーンからレッドゾーンへと空
気が流れるようにすれば第１図の効果よりも二重の安全
性を確保することができる。また、特別な送気システム
を必要としない構造にすることができる。FIG. 2 shows an example in which a thread groove 26 is provided in the shaft 7 in a portion located in the gap 22 between the slab 1 and the shaft 7 in FIG. 1. According to this example, by allowing air to flow from the amber zone to the red zone due to the hydraulic action caused by the rotation of @7, it is possible to ensure double safety than the effect shown in Figure 1. . Furthermore, it is possible to create a structure that does not require a special air supply system.
第３図はスラブ１の貫通孔１ａの内面にネジ溝２７を設
けた例を示しており、この例は第２図に示した例と同等
の作用効果を奏する。FIG. 3 shows an example in which a screw groove 27 is provided on the inner surface of the through hole 1a of the slab 1, and this example has the same effect as the example shown in FIG. 2.
なお、耐放射性液体２４としては水銀、ガリウムなどの
低融点金属またはそれらの合金を使用する。Note that as the radiation-resistant liquid 24, low melting point metals such as mercury and gallium, or alloys thereof are used.
なあ、上記実施例では遠心式抽出殿の例で説明したが、
本発明ではこれに限ることなく、たとえば遠心清澄機の
ように回転体を使用する軸シールにも適用できることは
もちろんである。By the way, in the above example, the example of centrifugal extraction chamber was explained.
The present invention is not limited to this, and can of course be applied to a shaft seal that uses a rotating body, such as in a centrifugal clearer.
［発明の効果］
本発明によれば軸シールのための送気システムが不要と
なり、簡単な構造で完全にシールできるので運転コスト
の低減が計れ、またメンテナンス性および信頼性の向上
も計ることができる。[Effects of the Invention] According to the present invention, there is no need for an air supply system for shaft sealing, and a complete seal can be achieved with a simple structure, reducing operating costs and improving maintainability and reliability. can.
第１図は本発明に係る軸シール装置を組込んだ遠心抽出
器を示す縦断面図、第２図および第３図はスラブと軸と
にネジシール溝を設けた例をそれぞれ一部側面で示す縦
断面図、第４図は従来の軸シール装置を組込んだ遠心抽
出器を示す断面図である。
１・・・放射線遮蔽スラブ
２・・・回転駆動部
３・・・回転体部
４・・・ハウジング
５・・・駆動モータ
６・・・カップリング
７・・・軸。
９・・・下軸受。
１１・・・ベロー。
１３・・・回転ボウル。
１５・・・重液相排出管
１６・・・軽液相排出管
１７・・・仕切り筒
１８・・・重液相供給ノズル
９・・・軽液相供給ノズル
２０・・・軽液相流出孔
２１・・・重液相流出孔
２２・・・隙間。
２４・・・耐放射性液体。
２６・・・ネジ溝。
８・・・上軸受
１０・・・ボックス
１２・・・供給管
１４・・・ケーシング
２３・・・円環状容器
２５・・・口字状円板
２７・・・スラブ側ネジ溝
第２図
（８７３３）代理人FIG. 1 is a longitudinal cross-sectional view showing a centrifugal extractor incorporating a shaft sealing device according to the present invention, and FIGS. 2 and 3 are partial side views of an example in which a threaded seal groove is provided in a slab and a shaft, respectively. FIG. 4 is a cross-sectional view showing a centrifugal extractor incorporating a conventional shaft sealing device. 1...Radiation shielding slab 2...Rotary drive unit 3...Rotating body part 4...Housing 5...Drive motor 6...Coupling 7...Shaft. 9...Lower bearing. 11... Bellow. 13...Rotating bowl. 15... Heavy liquid phase discharge pipe 16... Light liquid phase discharge pipe 17... Partition tube 18... Heavy liquid phase supply nozzle 9... Light liquid phase supply nozzle 20... Light liquid phase outflow Hole 21...Heavy liquid phase outflow hole 22...Gap. 24...Radiation-resistant liquid. 26...Screw groove. 8... Upper bearing 10... Box 12... Supply pipe 14... Casing 23... Annular container 25... Mouth-shaped disc 27... Slab side thread groove (Fig. 2) 8733) Agent
Claims (1)
ラブの上部に回転駆動部が、該スラブの下部に該回転駆
動部の軸に接続して回転する縦形回転体が設けられ、該
軸と該スラブとの隙間をシールする再処理施設用回転体
の軸シール装置において、前記スラブの上面に円環状容
器を設け、この容器内に耐放射性液体を収容し、この液
体内にその先端部が没入されるように前記軸に■字状円
板を取着してなることを特徴とする再処理施設用回転体
の軸シール装置。It is divided into upper and lower parts with the radiation shielding slab as a boundary, and the upper part of the slab is provided with a rotary drive part, the lower part of the slab is provided with a vertical rotating body that connects to the shaft of the rotary drive part and rotates, and the shaft and the slab In a shaft sealing device for a rotating body for a reprocessing facility, an annular container is provided on the upper surface of the slab, a radiation-resistant liquid is contained in the container, and the tip thereof is immersed in the liquid. 1. A shaft sealing device for a rotating body for a reprocessing facility, characterized in that a ■-shaped disc is attached to the shaft so as to be attached to the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220392A JPH0269696A (en) | 1988-09-05 | 1988-09-05 | Device for sealing rotating body shaft for reprocessing facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220392A JPH0269696A (en) | 1988-09-05 | 1988-09-05 | Device for sealing rotating body shaft for reprocessing facility |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0269696A true JPH0269696A (en) | 1990-03-08 |
Family
ID=16750397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220392A Pending JPH0269696A (en) | 1988-09-05 | 1988-09-05 | Device for sealing rotating body shaft for reprocessing facility |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0269696A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2346679A (en) * | 1999-02-03 | 2000-08-16 | David Sharp | Controlled cooling of beverages |
| JP2004230210A (en) * | 2003-01-28 | 2004-08-19 | Mitsubishi Kakoki Kaisha Ltd | Extractor |
| JP2009297673A (en) * | 2008-06-16 | 2009-12-24 | Tsukishima Techno Mente Service Kk | Gas seal device |
| JP2017205707A (en) * | 2016-05-18 | 2017-11-24 | 月島機械株式会社 | Seal device and agitator |
-
1988
- 1988-09-05 JP JP63220392A patent/JPH0269696A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2346679A (en) * | 1999-02-03 | 2000-08-16 | David Sharp | Controlled cooling of beverages |
| JP2004230210A (en) * | 2003-01-28 | 2004-08-19 | Mitsubishi Kakoki Kaisha Ltd | Extractor |
| JP2009297673A (en) * | 2008-06-16 | 2009-12-24 | Tsukishima Techno Mente Service Kk | Gas seal device |
| JP2017205707A (en) * | 2016-05-18 | 2017-11-24 | 月島機械株式会社 | Seal device and agitator |
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