JPS6319720B2 - - Google Patents
Info
- Publication number
- JPS6319720B2 JPS6319720B2 JP17454782A JP17454782A JPS6319720B2 JP S6319720 B2 JPS6319720 B2 JP S6319720B2 JP 17454782 A JP17454782 A JP 17454782A JP 17454782 A JP17454782 A JP 17454782A JP S6319720 B2 JPS6319720 B2 JP S6319720B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- hole
- liquid tank
- pump
- piping
- 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
- 239000007788 liquid Substances 0.000 claims description 51
- 238000007789 sealing Methods 0.000 claims description 11
- 230000002265 prevention Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は液と大気圧以上の圧力を有するガスと
を内部に溜めている液タンク内の液中に一部を浸
されたサブマージ型のポンプの軸封装置に関する
ものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a submerged pump that is partially immersed in liquid in a liquid tank that stores liquid and gas having a pressure higher than atmospheric pressure. The present invention relates to a shaft sealing device.
第１図にサブマージ型スクリユーポンプの全体
構造を示す。この図はポンプを液タンクに取付け
た時の概略構造を示している。この種のポンプに
於いては、メカニカルシールの様な高価な軸封構
造を用いず、軸１ａと取付台３との間から漏洩し
た液は液タンク７へ戻すことが可能であることか
ら図に示す様に軸受２と一体の軸封装置（ドレン
室５）を採用し漏洩液は貫通孔３ａから液タンク
７内へ戻す方法が簡便である為広く用いられてい
る。しかるに液タンク７に内圧がかかる場合、例
えば液が油などの可燃性物質であり、液タンク７
内の液を大気と隔離するために窒素ガス等で液タ
ンク内部に50〜100mmAqの内圧をかけており、こ
の場合貫通孔３ａから窒素ガスがドレン室５に逆
流し、その為ドレン室５に漏洩した液が外部（大
気）に流出されるという欠点があつた。この為、
第２図の左側に示す様に軸側に回転方向と逆のら
せん溝を設けたネジシール１ｂを採用することも
考えられるが、この方法は実験の結果あまり効果
がないことがわかつた。また、第２図の右側に示
す様に、ドレン室５の後流側にゴム製のオイルシ
ール６をシールカバー６ａを介して取付台３に取
付け、該オイルシール６を軸１ａに摺動させるこ
とにより大気への液の漏洩を防止することも考え
られるが、構造が複雑になること、高価であるこ
と、このオイルシールが摩耗品であることなどか
ら保守の頻度が増えるという欠点がある。
Figure 1 shows the overall structure of a submerged screw pump. This figure shows the schematic structure of the pump when it is attached to a liquid tank. In this type of pump, liquid leaking from between the shaft 1a and the mounting base 3 can be returned to the liquid tank 7 without using an expensive shaft seal structure such as a mechanical seal. As shown in the figure, a shaft sealing device (drain chamber 5) integrated with the bearing 2 is adopted, and leaked liquid is returned to the liquid tank 7 through the through hole 3a. This method is widely used because it is simple. However, if internal pressure is applied to the liquid tank 7, for example, the liquid is a flammable substance such as oil, and the liquid tank 7
In order to isolate the liquid inside from the atmosphere, an internal pressure of 50 to 100 mmAq is applied inside the liquid tank using nitrogen gas, etc. In this case, nitrogen gas flows back into the drain chamber 5 from the through hole 3a, and therefore There was a drawback that the leaked liquid was leaked to the outside (atmosphere). For this reason,
As shown on the left side of FIG. 2, it is conceivable to employ a screw seal 1b in which a helical groove is provided on the shaft side in the direction opposite to the direction of rotation, but experiments have shown that this method is not very effective. Further, as shown on the right side of FIG. 2, a rubber oil seal 6 is attached to the mounting base 3 via a seal cover 6a on the downstream side of the drain chamber 5, and the oil seal 6 is slid onto the shaft 1a. Although it is possible to prevent the liquid from leaking into the atmosphere, there are drawbacks such as the complicated structure, the high cost, and the fact that the oil seal is a wear item, which increases the frequency of maintenance.
なお、第１図，第２図において、１はポンプの
主ねじ、４は軸継手である。 In addition, in FIGS. 1 and 2, 1 is the main screw of the pump, and 4 is the shaft coupling.
本発明の目的は、安価でかつ液漏洩のないポン
プの軸封装置を提供することにある。
An object of the present invention is to provide a shaft sealing device for a pump that is inexpensive and free from liquid leakage.
本発明は、漏洩液排出用貫通孔にタンク内のガ
スが逆流しない様に配慮したものであつて、ポン
プの軸封部から漏洩する液を液タンクへ戻す配管
あるいは貫通孔を備えるものにおいて、前記液タ
ンク内のガスが前記配管あるいは貫通孔を経て前
記軸封部に流出するのを防止するために、前記配
管あるいは貫通孔の一部にガス流出防止手段を構
成したことを特徴とするものである。
The present invention is designed to prevent the gas in the tank from flowing back into the through hole for discharging leaked liquid, and is provided with piping or through holes for returning liquid leaking from the shaft sealing part of the pump to the liquid tank. In order to prevent the gas in the liquid tank from flowing out to the shaft sealing portion through the piping or through-hole, a gas outflow prevention means is configured in a part of the piping or through-hole. It is.
第３図は本発明装置の一実施例を備える液ポン
プの全体構造図であり、第１図，第２図と同一符
号を付した部分は同一部分である。この実施例で
は、取付台３に形成した貫通孔３ａに配管８を接
続し、その配管８の先端部を液タンク７内の液中
に浸すようにして配管８にガス流出防止手段を構
成したものである。この構造とすると貫通孔３ａ
は液タンク７内のガス圧力の如何にかかわらず常
に大気圧に維持され、したがつて、従来装置の欠
点を完全に解決することができ、液漏洩を確実に
防止できる。すなわち、液タンク７内のガス圧
は、前述したように通常50〜100ｍAqの内圧がか
けられているが、この程度の圧力では液が配管８
内を数10ｍAq〜数100ｍAq程度上昇するだけで
液タンク７内のガス圧とバランスがとれ、したが
つて液が配管８から液タンク７外に漏洩すること
はない。また、本発明では構造が極めて簡単であ
るから、安価な軸封装置を提供できる効果もあ
る。
FIG. 3 is an overall structural diagram of a liquid pump equipped with an embodiment of the device of the present invention, and parts given the same reference numerals as in FIGS. 1 and 2 are the same parts. In this embodiment, a pipe 8 is connected to a through hole 3a formed in a mounting base 3, and the tip of the pipe 8 is immersed in the liquid in a liquid tank 7, thereby forming a gas leak prevention means in the pipe 8. It is something. With this structure, the through hole 3a
is always maintained at atmospheric pressure regardless of the gas pressure in the liquid tank 7, thus completely solving the drawbacks of conventional devices and reliably preventing liquid leakage. In other words, the gas pressure in the liquid tank 7 is normally 50 to 100 mAq as described above, but at this level of pressure, the liquid will not flow into the pipe 8.
The gas pressure in the liquid tank 7 can be balanced by simply raising the inside of the tank by several tens of mAq to several hundred mAq, so that the liquid will not leak from the piping 8 to the outside of the liquid tank 7. Further, since the structure of the present invention is extremely simple, it is possible to provide an inexpensive shaft sealing device.
なお、本発明は上記実施例の他に、配管８ある
いは貫通孔３ａにＵシール部を形成するようにし
てもガス流出防止手段を構成することができる。
すなわち、第４図に示すようにＵ字形配管１０を
貫通孔３ａに接続すると、配管１０内に貯えられ
た液位差（配管１０内の低位の液面と高位の液面
との差）によつて液タンク７内のガスを封じるこ
とができる。この場合においても、低位の液面と
高位の液面との間に数10mm〜数100mmの液位差が
生じるだけで液が配管10から液タンク７外に漏洩
することはない。さらに、配管８を設けず、貫通
孔３ａを液ポンプのケーシング９に穿設し、該貫
通孔３ａの先端部を液タンク７の油中に浸すよう
しても同様の効果が得られるものである。 In addition to the above-described embodiments, the present invention can constitute a gas outflow prevention means by forming a U-seal portion in the pipe 8 or the through hole 3a.
That is, when the U-shaped pipe 10 is connected to the through hole 3a as shown in FIG. Therefore, the gas in the liquid tank 7 can be sealed. Even in this case, the liquid will not leak out of the liquid tank 7 from the piping 10, although only a difference in liquid level of several tens to hundreds of mm will occur between the lower liquid level and the higher liquid level. Furthermore, the same effect can be obtained even if the piping 8 is not provided, a through hole 3a is bored in the casing 9 of the liquid pump, and the tip of the through hole 3a is immersed in the oil in the liquid tank 7. be.
本発明によれば、簡便な方法で従来装置の欠点
を解決できるから、安価でかつ液漏洩のないポン
プの軸封装置を提供することができる。
According to the present invention, the drawbacks of conventional devices can be solved by a simple method, so that it is possible to provide a shaft sealing device for a pump that is inexpensive and free from liquid leakage.
第１図は従来装置を備えた液ポンプの全体構造
を示す縦断面図、第２図はポンプ軸封部分の拡大
断面図で、左側はネジシールを利用した例、右側
はオイルシールを利用した例を示す図、第３図は
本発明装置を備えた液ポンプの全体構造を示す縦
断面図、第４図は他の実施例の全体構造を示す断
面図である。
３ａ……貫通孔、７……液タンク、８，１０…
…配管。
Figure 1 is a longitudinal sectional view showing the overall structure of a liquid pump equipped with a conventional device, and Figure 2 is an enlarged sectional view of the pump shaft seal.The left side is an example using a screw seal, and the right side is an example using an oil seal. FIG. 3 is a longitudinal cross-sectional view showing the overall structure of a liquid pump equipped with the device of the present invention, and FIG. 4 is a cross-sectional view showing the overall structure of another embodiment. 3a...Through hole, 7...Liquid tank, 8, 10...
…Piping.
Claims (1)
に溜めている液タンクと、該液タンク内の液中に
一部を浸されるポンプと、該ポンプの軸封部から
漏洩する液を液タンクへ戻す配管あるいは貫通孔
を備えるものにおいて、前記液タンク内のガスが
前記配管あるいは貫通孔を経て前記軸封部に流出
するのを防止するために、前記配管あるいは貫通
孔の一部にガス流出防止手段を構成したことを特
徴とするポンプの軸封装置。 ２ 配管あるいは貫通孔の先端部を液タンク内の
液中に浸すことによりガス流出防止手段を構成し
たことを特徴とする特許請求の範囲第１項記載の
ポンプの軸封装置。 ３ 配管あるいは貫通孔の途中にＵシール部を形
成することによりガス流出防止手段を構成したこ
とを特徴とする特許請求の範囲第１項記載のポン
プの軸封装置。[Scope of Claims] 1. A liquid tank that stores a liquid and a gas having a pressure higher than atmospheric pressure, a pump that is partially immersed in the liquid in the liquid tank, and a shaft seal of the pump. In a device equipped with piping or a through hole for returning liquid leaking from a part to a liquid tank, in order to prevent gas in the liquid tank from flowing out to the shaft sealing part through the piping or through hole, A shaft sealing device for a pump, characterized in that a gas outflow prevention means is configured in a part of a through hole. 2. The shaft sealing device for a pump according to claim 1, wherein the gas outflow prevention means is constructed by immersing the tip of the piping or the through hole in the liquid in the liquid tank. 3. The shaft sealing device for a pump according to claim 1, wherein the gas outflow prevention means is constituted by forming a U-seal part in the middle of the piping or the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17454782A JPS5965598A (en) | 1982-10-06 | 1982-10-06 | Shaft seal device for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17454782A JPS5965598A (en) | 1982-10-06 | 1982-10-06 | Shaft seal device for pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5965598A JPS5965598A (en) | 1984-04-13 |
| JPS6319720B2 true JPS6319720B2 (en) | 1988-04-25 |
Family
ID=15980456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17454782A Granted JPS5965598A (en) | 1982-10-06 | 1982-10-06 | Shaft seal device for pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5965598A (en) |
-
1982
- 1982-10-06 JP JP17454782A patent/JPS5965598A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5965598A (en) | 1984-04-13 |
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