JP6847400B2 - Incorrect lubrication prevention device for underground tanks - Google Patents

Incorrect lubrication prevention device for underground tanks Download PDF

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JP6847400B2
JP6847400B2 JP2019025321A JP2019025321A JP6847400B2 JP 6847400 B2 JP6847400 B2 JP 6847400B2 JP 2019025321 A JP2019025321 A JP 2019025321A JP 2019025321 A JP2019025321 A JP 2019025321A JP 6847400 B2 JP6847400 B2 JP 6847400B2
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valve body
valve
fuel oil
cam
underground tank
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JP2020132175A (en
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鈴木　尚彦
尚彦 鈴木
高之 布施
高之 布施
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Tatsuno Corp
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Description

本発明は、地下タンクへの誤注油防止装置に関し、特に、タンクローリから給油所の地下タンクへ荷卸しする燃料油の誤注油を防止する装置に関する。 The present invention relates to a device for preventing erroneous lubrication to an underground tank, and more particularly to a device for preventing erroneous lubrication of fuel oil to be unloaded from a tank truck to an underground tank at a gas station.

給油所に燃料油を配送するタンクローリは、複数のハッチ毎にガソリン、軽油、灯油を積み込み、給油所の地下タンクヘ荷卸しするときには、タンクローリ側の１本の吐出管を共用する。そのため、油種を間違えて荷卸しする可能性を否定できない。このような事態が発生すると、荷卸しされた燃料油が無駄になるだけでなく、混油した燃料油を販売することもできない。さらに、混油後の燃料油の後始末も容易ではない。 The tank lorry that delivers fuel oil to the gas station loads gasoline, light oil, and kerosene for each of a plurality of hatches, and shares one discharge pipe on the tank lorry side when unloading to the underground tank of the gas station. Therefore, the possibility of unloading the wrong oil type cannot be denied. When such a situation occurs, not only the unloaded fuel oil is wasted, but also the mixed fuel oil cannot be sold. Furthermore, it is not easy to clean up the fuel oil after the mixed oil.

そこで、本発明は、燃料油を給油所に荷卸しする際の地下タンクヘの誤注油を防止することを目的とする。 Therefore, an object of the present invention is to prevent erroneous lubrication to an underground tank when unloading fuel oil to a gas station.

上記目的を達成するため、本発明は、地下タンクへの誤注油防止装置であって、給油所の地下タンクから地上へ延設される注油管に設けられ、タンクローリから荷卸しされる燃料油の注油ホースが接続され、前記地下タンクから燃料油が溢れ出ることを防止する弁と、該弁の内部を所定の種類の燃料油が通過すると、一部が溶けることにより、前記弁体との係合が解かれ、付勢手段によって前記弁の弁体を閉方向へ移動させる弁体駆動手段と、外部から前記弁体駆動手段の状態を確認するためのサイトグラスとを備えることを特徴とする。 In order to achieve the above object, the present invention is an erroneous lubrication prevention device for an underground tank, which is a fuel oil provided in an lubrication pipe extending from an underground tank of a gas station to the ground and unloaded from a tank truck. A valve that is connected to a lubrication hose to prevent fuel oil from overflowing from the underground tank, and when a predetermined type of fuel oil passes through the inside of the valve, a part of the valve melts to engage with the valve body. It is characterized by comprising a valve body driving means for moving the valve body of the valve in the closing direction by the urging means and a sight glass for confirming the state of the valve body driving means from the outside. ..

本発明によれば、燃料油を給油所に荷卸しする際に、弁の内部を所定の種類の燃料油（荷卸ししようとしている燃料油とは異なる種類の燃料油）が通過すると、弁体駆動手段が弁体を閉方向へ移動させて地下タンクへ流れるのを妨げるため、地下タンクへの誤注油を防止することができる。また、サイトグラスによって所望の燃料油が供給されていないこと、又は混油が生じたことを確認することができる。 According to the present invention, when unloading fuel oil to a gas station, if a predetermined type of fuel oil (a type of fuel oil different from the fuel oil to be unloaded) passes through the inside of the valve, the valve body Since the driving means prevents the valve body from moving in the closing direction and flowing to the underground tank, it is possible to prevent erroneous lubrication to the underground tank. In addition, it can be confirmed that the desired fuel oil is not supplied or the mixed oil is generated by the sight glass.

例えば、前記弁体駆動手段は、前記弁体と一体の弁軸と当接するカムを備え、該カムの当接部が溶けることにより、前記弁体駆動手段と前記弁体との係合が解かれたり、前記弁体と一体の弁軸と当接するカムを回転させるための回転軸を備え、該回転軸の前記カムとの当接部が溶けることにより、前記弁体駆動手段と前記弁体との係合が解かれるように構成することができる。これにより、簡単な構成で、燃料油を給油所に荷卸しする際の地下タンクへの誤注油を防止することができる。また、溶けた部品の交換を容易に行うことができ、復帰作業が容易となる。 For example, the valve body drive means comprises a valve body and a valve shaft abutting cam integral, by abutment of the cam melts, the engagement between the valve body and the valve body drive means The valve body driving means and the valve are provided with a rotating shaft for rotating a cam that is unwound or that comes into contact with the valve shaft that is integrated with the valve body, and the contact portion of the rotating shaft with the cam melts. It can be configured to disengage from the body. As a result, it is possible to prevent erroneous lubrication to the underground tank when unloading the fuel oil to the gas station with a simple configuration. In addition, the melted parts can be easily replaced, and the restoration work becomes easy.

また、本発明は、地下タンクへの誤注油防止装置であって、給油所の地下タンクから地上へ延設される注油管に設けられ、タンクローリから荷卸しされる燃料油の注油ホースが接続され、前記地下タンクから燃料油が溢れ出ることを防止する弁と、該弁の内部を所定の種類の燃料油が通過すると、一部が膨潤することにより、前記弁体との係合が解かれ、付勢手段によって前記弁の弁体を閉方向へ移動させる弁体駆動手段と、外部から前記弁体駆動手段の状態を確認するためのサイトグラスとを備えることを特徴とする。本発明も上記発明と同様の効果を奏する。また、例えば、前記弁体駆動手段は、前記弁体と一体の弁軸を収容する孔部を有するカムを備え、該カムの孔部周辺が膨潤することにより、該弁体駆動手段と前記弁体との係合が解かれるように構成することができる。これにより、簡単な構成で、燃料油を給油所に荷卸しする際の地下タンクへの誤注油を防止することができる。また、膨潤した部品の交換を容易に行うことができ、復帰作業が容易となる。 Further, the present invention is an erroneous lubrication prevention device for an underground tank, which is provided in an lubrication pipe extending from the underground tank of a gas station to the ground, and is connected to a fuel oil lubrication hose unloading from a tank truck. a valve to prevent the exiting fuel oil overflows from the underground tank, the inside of the valve is predetermined type of fuel oil passing through, by partially swelling, the engagement between the front Kiben body solutions The valve body driving means for moving the valve body of the valve in the closing direction by the urging means and a sight glass for confirming the state of the valve body driving means from the outside are provided. The present invention also has the same effect as the above invention. Further, for example, the valve body driving means includes a cam having a hole for accommodating a valve shaft integrated with the valve body, and the valve body driving means and the valve are formed by swelling around the hole of the cam. It can be configured to disengage from the body. As a result, it is possible to prevent erroneous lubrication to the underground tank when unloading the fuel oil to the gas station with a simple configuration. In addition, the swollen parts can be easily replaced, and the restoration work becomes easy.

以上のように、本発明によれば、燃料油を給油所に荷卸しする際の地下タンクヘの誤注油を防止することができる。 As described above, according to the present invention, it is possible to prevent erroneous lubrication to the underground tank when unloading fuel oil to a gas station.

本発明に係る地下タンクへの誤注油防止装置の第１の実施形態を示す一部破断斜視図である。It is a partially broken perspective view which shows the 1st Embodiment of the erroneous lubrication prevention device to the underground tank which concerns on this invention. 図１の誤注油防止装置の弁開動作を説明するための一部破断斜視図であって、（ａ）は誤注油防止装置全体を、（ｂ）は弁体及びその近傍を示す図である。FIG. 1 is a partially broken perspective view for explaining the valve opening operation of the erroneous lubrication prevention device of FIG. 1, in which FIG. 1A shows the entire erroneous lubrication prevention device, and FIG. 1B shows the valve body and its vicinity. .. 図１の誤注油防止装置において、灯油を荷卸している際に誤ってガソリンが混ざった場合の動作を説明するための一部破断斜視図であって、（ａ）は誤注油防止装置全体を、（ｂ）は弁体及びその近傍を示す図である。FIG. 1 is a partially broken perspective view for explaining the operation when gasoline is mistakenly mixed when unloading kerosene in the erroneous lubrication prevention device of FIG. 1, and FIG. 1A is a partially broken perspective view of the entire erroneous lubrication prevention device. , (B) is a diagram showing a valve body and its vicinity. 本発明に係る地下タンクへの誤注油防止装置の動作を確認するためのサイトグラスを示す図であって、（ａ）はサイトグラスの取付位置を示す一部破断斜視図、（ｂ）はサイトグラスで誤注油防止装置のカムの状態を見た場合を示す正面図である。It is a figure which shows the sight glass for confirming the operation of the erroneous lubrication prevention device to the underground tank which concerns on this invention, (a) is a partially broken perspective view which shows the mounting position of a sight glass, (b) is a sight. It is a front view which shows the case where the state of the cam of the erroneous lubrication prevention device is seen with a glass. 本発明に係る地下タンクへの誤注油防止装置の第２の実施形態を示す一部破断斜視図であって、（ａ）は誤注油防止装置全体を、（ｂ）は弁体及びその近傍を示す図である。It is a partially broken perspective view which shows the 2nd Embodiment of the erroneous lubrication prevention device to the underground tank which concerns on this invention, (a) is the whole erroneous lubrication prevention device, (b) is a valve body and its vicinity. It is a figure which shows. 本発明に係る地下タンクへの誤注油防止装置の第３の実施形態を示す一部破断斜視図であって、（ａ）は誤注油防止装置全体を、（ｂ）は弁体及びその近傍を示す図である。It is a partially broken perspective view which shows the 3rd Embodiment of the erroneous lubrication prevention device to the underground tank which concerns on this invention, (a) is the whole erroneous lubrication prevention device, (b) is a valve body and its vicinity. It is a figure which shows.

次に、本発明を実施するための形態について、図面を参照しながら詳細に説明する。 Next, a mode for carrying out the present invention will be described in detail with reference to the drawings.

図１〜図４は、本発明に係る地下タンクへの誤注油防止装置（以下「誤注油防止装置」という。）の第１の実施形態を示し、この誤注油防止装置１は、燃料油の地下タンクへの荷卸しの際に、地下タンクから燃料油が溢れ出るのを防止したり、地震等の際に的確に荷卸し作業を停止するためのオーバーフロー防止装置を利用したものである。 1 to 4 show a first embodiment of an erroneous lubrication prevention device (hereinafter referred to as “erroneous lubrication prevention device”) for an underground tank according to the present invention, and the erroneous lubrication prevention device 1 is for fuel oil. It uses an overflow prevention device to prevent fuel oil from overflowing from the underground tank when unloading to the underground tank, and to stop the unloading work accurately in the event of an earthquake or the like.

誤注油防止装置１は、図１及び図２に示すように、弁の構成要素として、右端部が地下タンクの注油管３０に接続されると共に、左端部がタンクローリの注油ホース４０に接続される弁本体２と、弁本体２の内部に設けられる円板状の弁体４と、弁体４と一体に形成される弁軸９と、弁軸９の周囲に巻回され、弁体４を弁座７側に付勢するコイルばね３と、弁体４が接離する弁座７と、弁体４をコイルばね３の付勢力に対抗して弁座７に接離させるカム５を下端部に備える回転軸６と、回転軸６の上端部側に設けられた回動操作用の操作レバー８と、電源が入ることで回転軸６と操作レバー８とが一体化するよう設けられた励磁によるクラッチ機構（不図示）と、外部からカム５の状態を確認するサイトグラス１０等で構成される。 As shown in FIGS. 1 and 2, the erroneous lubrication prevention device 1 is connected to the lubrication pipe 30 of the underground tank at the right end and to the lubrication hose 40 of the tank lorry at the left end as a component of the valve. The valve body 2, the disc-shaped valve body 4 provided inside the valve body 2, the valve shaft 9 formed integrally with the valve body 4, and the valve body 4 are wound around the valve shaft 9. The lower end of the coil spring 3 that urges the valve seat 7 side, the valve seat 7 that the valve body 4 contacts and separates, and the cam 5 that causes the valve body 4 to contact and separate from the valve seat 7 against the urging force of the coil spring 3. The rotating shaft 6 provided in the portion, the operating lever 8 for rotating operation provided on the upper end side of the rotating shaft 6, and the rotating shaft 6 and the operating lever 8 are provided so as to be integrated when the power is turned on. It is composed of a clutch mechanism (not shown) by excitation and a sight glass 10 or the like for confirming the state of the cam 5 from the outside.

サイトグラス１０は、図４に示すように、カム５の状態を確認するために弁本体２に設けられ、誤注油防止装置１の弁が閉じた場合に、カム５の状態を見て、カム５の当接部５ａ（図１及び図２参照）が溶けている場合には、所望の燃料油が供給されていないこと、又は混油が生じたことを確認することができる。 As shown in FIG. 4, the sight glass 10 is provided on the valve body 2 to check the state of the cam 5, and when the valve of the erroneous lubrication prevention device 1 is closed, the state of the cam 5 is observed and the cam is checked. When the contact portion 5a (see FIGS. 1 and 2) of No. 5 is melted, it can be confirmed that the desired fuel oil has not been supplied or that mixed oil has occurred.

上記誤注油防止装置１がオーバーフロー防止装置として機能する際は、荷卸し時に、電源を入れて励磁されたクラッチ機構により回転軸６と操作レバー８とが一体化された状態で、操作レバー８を操作して回転軸６を回し、カム５により弁体４をコイルばね３の付勢力に抗して移動させて弁を開く。そして、地下タンクに設けられる油面計（不図示）が上限信号を検知すると、制御装置はクラッチ機構の励磁を解除して弁体４を弁座７に当接させて弁を閉じ、地下タンクが満タンになると燃料油のオーバーフローを防止して、正常に荷卸しを終了する。 When the erroneous lubrication prevention device 1 functions as an overflow prevention device, the operating lever 8 is operated in a state where the rotating shaft 6 and the operating lever 8 are integrated by the clutch mechanism excited by turning on the power at the time of unloading. By operating the rotating shaft 6, the cam 5 moves the valve body 4 against the urging force of the coil spring 3 to open the valve. Then, when the oil level gauge (not shown) provided in the underground tank detects the upper limit signal, the control device releases the excitation of the clutch mechanism, brings the valve body 4 into contact with the valve seat 7, closes the valve, and closes the underground tank. When the tank is full, the overflow of fuel oil is prevented and unloading is completed normally.

上記誤注油防止装置１は、さらに、弁体４を備えた弁軸９に当接するカム５の当接部５ａをガソリンで溶ける材料、例えば発泡スチロールで形成した。これにより、弁本体２の内部を灯油が流れている際には、図２に示すように、弁体４が開いて灯油が地下タンクに流れるが、誤って灯油にガソリンが混じった場合には、図３に示すように、カム５の当接部５ａが溶け、弁体４がコイルばね３の付勢力よって右方へ移動する。そして、弁体４が弁座７に当接することで弁が閉じられ、ガソリンが地下タンクに流入するのを防止する。この状態をサイトグラス１０で確認することができる。また、弁が閉じたことを給油所の事務所等に設けた報知器から出力することで、混油が生じたことを即座に給油所の係員等に知らせることができる。 In the erroneous lubrication prevention device 1, the contact portion 5a of the cam 5 that contacts the valve shaft 9 provided with the valve body 4 is further formed of a material that dissolves gasoline, for example, Styrofoam. As a result, when kerosene is flowing inside the valve body 2, the valve body 4 opens and kerosene flows into the underground tank as shown in FIG. 2, but if gasoline is mistakenly mixed with kerosene, As shown in FIG. 3, the contact portion 5a of the cam 5 melts, and the valve body 4 moves to the right by the urging force of the coil spring 3. Then, when the valve body 4 comes into contact with the valve seat 7, the valve is closed to prevent gasoline from flowing into the underground tank. This state can be confirmed with the sight glass 10. Further, by outputting the closing of the valve from a notification device provided in the office of the gas station or the like, it is possible to immediately notify the staff of the gas station or the like that the mixed oil has occurred.

尚、混油が生じてカム５の当接部５ａが溶けた後、カム５を新たなものに交換することで、誤注油防止装置１を元の状態に復帰させることができる。 After the mixed oil is generated and the contact portion 5a of the cam 5 is melted, the erroneous lubrication prevention device 1 can be returned to the original state by replacing the cam 5 with a new one.

次に、本発明に係る誤注油防止装置の第２の実施の形態について、図５を参照しながら説明する。 Next, a second embodiment of the erroneous lubrication prevention device according to the present invention will be described with reference to FIG.

この誤注油防止装置１１は、カム５と回転軸６の材料が上記誤注油防止装置１とは異なる。誤注油防止装置１１においては、当接部１５ａを含むカム１５全体をガソリンで溶けない材料で形成し、カム１５と係合する回転軸１６の下端部をガソリンで溶ける材料で形成した。これにより、誤って灯油にガソリンが混じった場合には、回転軸１６の下端部が溶け、回転軸１６の力がカム１５に伝達されなくなることで、上記誤注油防止装置１と同様に、弁体４がコイルばね３の付勢力よって右方へ移動する。そして、弁体４が弁座７に当接することで弁が閉じられ、ガソリンが地下タンクに流入するのを防止する。この状態をサイトグラス１０で確認することができる。 The material of the cam 5 and the rotating shaft 6 of the erroneous lubrication prevention device 11 is different from that of the erroneous lubrication prevention device 1. In the erroneous lubrication prevention device 11, the entire cam 15 including the contact portion 15a is made of a material that is insoluble in gasoline, and the lower end of the rotating shaft 16 that engages with the cam 15 is made of a material that is soluble in gasoline. As a result, if gasoline is mistakenly mixed with kerosene, the lower end of the rotating shaft 16 melts and the force of the rotating shaft 16 is not transmitted to the cam 15, so that the valve is similar to the above-mentioned erroneous lubrication prevention device 1. The body 4 moves to the right by the urging force of the coil spring 3. Then, when the valve body 4 comes into contact with the valve seat 7, the valve is closed to prevent gasoline from flowing into the underground tank. This state can be confirmed with the sight glass 10.

尚、混油が生じて回転軸１６の下端部が溶けた後、回転軸１６を新たなものに交換することで、誤注油防止装置１１を元の状態に復帰させることができる。 The erroneous lubrication prevention device 11 can be returned to the original state by replacing the rotary shaft 16 with a new one after the mixed oil is generated and the lower end portion of the rotary shaft 16 is melted.

次に、本発明に係る誤注油防止装置の第３の実施の形態について、図６を参照しながら説明する。 Next, a third embodiment of the erroneous lubrication prevention device according to the present invention will be described with reference to FIG.

この誤注油防止装置２１は、カム５の材料が上記誤注油防止装置１とは異なる。誤注油防止装置２１においては、カム２５の当接部２５ａをガソリンで溶ける材料で形成せず、回転軸６に当接する軸受部２５ｂをガソリンで膨潤する材料で形成した。これにより、誤って灯油にガソリンが混じった場合には、カム２５の軸受部２５ｂが膨潤し、当接部２５ａと回転軸６との間の係合状態が解け、回転軸６の力がカム２５に伝達されなくなることで、弁体４がコイルばね３の付勢力よって右方へ移動する。そして、弁体４が弁座７に当接することで弁が閉じられ、ガソリンが地下タンクに流入するのを防止する。この状態をサイトグラス１０で確認することができる。 The material of the cam 5 of the erroneous lubrication prevention device 21 is different from that of the erroneous lubrication prevention device 1. In the erroneous lubrication prevention device 21, the contact portion 25a of the cam 25 is not formed of a material that dissolves in gasoline, but the bearing portion 25b that contacts the rotating shaft 6 is formed of a material that swells with gasoline. As a result, when gasoline is mistakenly mixed with kerosene, the bearing portion 25b of the cam 25 swells, the engagement state between the contact portion 25a and the rotating shaft 6 is released, and the force of the rotating shaft 6 is applied to the cam. When the transmission to 25 is stopped, the valve body 4 moves to the right by the urging force of the coil spring 3. Then, when the valve body 4 comes into contact with the valve seat 7, the valve is closed to prevent gasoline from flowing into the underground tank. This state can be confirmed with the sight glass 10.

尚、混油が生じてカム２５の軸受部２５ｂが膨潤した後、カム２５を新たなものに交換することで、誤注油防止装置２１を元の状態に復帰させることができる。 After the mixed oil is generated and the bearing portion 25b of the cam 25 is swollen, the erroneous lubrication prevention device 21 can be returned to the original state by replacing the cam 25 with a new one.

尚、上記実施の形態においては、弁体駆動手段としてのカム５等の一部や回転軸６をガソリンで溶ける材料や膨潤する材料で形成したが、その他の構成を有する弁体駆動手段を用い、弁体駆動手段の構成要素の一部をガソリンで溶ける材料や膨潤する材料で形成してもよい。 In the above embodiment, a part of the cam 5 or the like as the valve body driving means and the rotating shaft 6 are made of a material that dissolves in gasoline or a material that swells, but a valve body driving means having another configuration is used. , A part of the components of the valve body driving means may be formed of a material that dissolves in gasoline or a material that swells.

また、上記実施の形態においては灯油を給油している場合に誤ってガソリンが混入した場合を例示したが、ガソリン以外の燃料油にのみ溶ける材料を用いて、ガソリン以外の燃料油の混油を防止することもできる。 Further, in the above embodiment, the case where gasoline is mistakenly mixed in when kerosene is being refueled has been illustrated, but a mixed oil of fuel oil other than gasoline is used by using a material that is soluble only in fuel oil other than gasoline. It can also be prevented.

１ 誤注油防止装置
２ 弁本体
３ コイルばね
４ 弁体
５ カム
５ａ 当接部
６ 回転軸
７ 弁座
８ 操作レバー
９ 弁軸
１０ サイトグラス
１１ 誤注油防止装置
１５ カム
１５ａ 当接部
１６ 回転軸
２１ 誤注油防止装置
２５ カム
２５ａ 当接部
２５ｂ 軸受部
３０ 注油管
４０ 注油ホース 1 False lubrication prevention device 2 Valve body 3 Coil spring 4 Valve body 5 Cam 5a Contact part 6 Rotating shaft 7 Valve seat 8 Operating lever 9 Valve shaft 10 Sight glass 11 False lubrication prevention device 15 Cam 15a Contact part 16 Rotating shaft 21 Wrong lubrication prevention device 25 Cam 25a Contact part 25b Bearing part 30 Lubrication pipe 40 Lubrication hose

Claims (5)

給油所の地下タンクから地上へ延設される注油管に設けられ、タンクローリから荷卸しされる燃料油の注油ホースが接続され、前記地下タンクから燃料油が溢れ出ることを防止する弁と、
該弁の内部を所定の種類の燃料油が通過すると、一部が溶けることにより、前記弁体との係合が解かれ、付勢手段によって前記弁の弁体を閉方向へ移動させる弁体駆動手段と、
外部から前記弁体駆動手段の状態を確認するためのサイトグラスとを備えることを特徴とする地下タンクへの誤注油防止装置。 A valve installed in the lubrication pipe extending from the underground tank of the gas station to the ground and connected to the fuel oil lubrication hose unloading from the tank truck to prevent the fuel oil from overflowing from the underground tank.
When a predetermined type of fuel oil passes through the inside of the valve, a part of the fuel oil melts, so that the engagement with the valve body is disengaged and the valve body of the valve is moved in the closing direction by an urging means. and drive means,
An erroneous lubrication prevention device for an underground tank, which comprises a sight glass for confirming the state of the valve body driving means from the outside. 給油所の地下タンクから地上へ延設される注油管に設けられ、タンクローリから荷卸しされる燃料油の注油ホースが接続され、前記地下タンクから燃料油が溢れ出ることを防止する弁と、
該弁の内部を所定の種類の燃料油が通過すると、一部が膨潤することにより、前記弁体との係合が解かれ、付勢手段によって前記弁の弁体を閉方向へ移動させる弁体駆動手段と、
外部から前記弁体駆動手段の状態を確認するためのサイトグラスとを備えることを特徴とする地下タンクへの誤注油防止装置。 A valve installed in the lubrication pipe extending from the underground tank of the gas station to the ground and connected to the fuel oil lubrication hose unloading from the tank truck to prevent the fuel oil from overflowing from the underground tank.
When a predetermined type of fuel oil passes through the inside of the valve, a part of the fuel oil swells to disengage the engagement with the valve body, and the valve body of the valve is moved in the closing direction by an urging means. body and drive means,
An erroneous lubrication prevention device for an underground tank, which comprises a sight glass for confirming the state of the valve body driving means from the outside. 前記弁体駆動手段は、前記弁体と一体の弁軸と当接するカムを備え、該カムの当接部が溶けることにより、前記弁体駆動手段と前記弁体との係合が解かれることを特徴とする請求項１に記載の地下タンクへの誤注油防止装置。 The valve body driving means includes a cam that comes into contact with the valve shaft integrated with the valve body, and the contact portion of the cam melts to disengage the valve body driving means from the valve body. The device for preventing erroneous lubrication to an underground tank according to claim 1. 前記弁体駆動手段は、前記弁体と一体の弁軸と当接するカムを回転させるための回転軸を備え、該回転軸の前記カムとの当接部が溶けることにより、前記弁体駆動手段と前記弁体との係合が解かれることを特徴とする請求項１に記載の地下タンクへの誤注油防止装置。 The valve body driving means includes a rotating shaft for rotating a cam that comes into contact with the valve shaft integrated with the valve body, and the valve body driving means is formed by melting the contact portion of the rotating shaft with the cam. The erroneous lubrication prevention device for an underground tank according to claim 1 , wherein the engagement with the valve body is disengaged. 前記弁体駆動手段は、前記弁体と一体の弁軸を収容する孔部を有するカムを備え、該カムの孔部周辺が膨潤することにより、該弁体駆動手段と前記弁体との係合が解かれることを特徴とする請求項２に記載の地下タンクへの誤注油防止装置。 The valve body driving means includes a cam having a hole for accommodating a valve shaft integrated with the valve body, and the periphery of the hole of the cam swells to engage the valve body driving means with the valve body. The device for preventing erroneous lubrication to an underground tank according to claim 2 , wherein the case is released.
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