JP4994966B2 - Liquid pumping device - Google Patents

Liquid pumping device Download PDF

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JP4994966B2
JP4994966B2 JP2007159488A JP2007159488A JP4994966B2 JP 4994966 B2 JP4994966 B2 JP 4994966B2 JP 2007159488 A JP2007159488 A JP 2007159488A JP 2007159488 A JP2007159488 A JP 2007159488A JP 4994966 B2 JP4994966 B2 JP 4994966B2
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liquid
valve
inlet
check valve
power transmission
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JP2008309288A (en
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昌久 広谷
知美 久保
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Tlv Co Ltd
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Description

本発明は、温水や燃料等の液体を圧送する液体圧送装置に関するものである。本発明の液体圧送装置は、各種蒸気使用装置で発生した復水をボイラーや廃熱利用箇所に送る装置として特に適するものである。   The present invention relates to a liquid pumping device that pumps liquid such as hot water or fuel. The liquid pressure feeding device of the present invention is particularly suitable as a device for sending condensate generated in various steam using devices to a boiler or a waste heat utilization site.

従来の液体圧送装置は、密閉容器に作動蒸気導入口と作動蒸気排出口と液体流入口及び液体排出口が設けられ、作動蒸気導入口に給気弁が設けられ、作動蒸気排出口に排気弁が設けられ、液体流入口に密閉容器への液体の流れだけを許容する流入側逆止弁が設けられ、液体排出口に液体圧送先への流体の流れだけを許容する圧送側逆止弁が設けられ、密閉容器内に配置されたフロートの昇降に応じてスナップ機構を動作させて動力伝達軸をスナップ移動させることにより、動力伝達軸に連結された給気弁と排気弁の開閉を切り換えて、初めに排気弁を開き給気弁を閉じることにより流入側逆止弁を介して液体を密閉容器内に流入させ、次いで排気弁を閉じ給気弁を開くことにより密閉容器内に溜った液体を圧送側逆止弁を介して液体圧送先へ圧送するものである。 In a conventional liquid pumping device, a closed container is provided with a working steam inlet, a working steam outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working steam inlet, and an exhaust valve is provided at the working steam outlet. An inlet check valve that allows only the flow of liquid to the sealed container at the liquid inlet, and a pressure check valve that allows only the fluid flow to the liquid destination at the liquid outlet. By switching the power supply shaft and the exhaust valve connected to the power transmission shaft by switching the power transmission shaft by snapping the power transmission shaft by operating the snap mechanism according to the lift of the float arranged in the sealed container First, the exhaust valve is opened and the air supply valve is closed to allow the liquid to flow into the sealed container through the inflow side check valve. Then, the liquid accumulated in the sealed container is closed by closing the exhaust valve and opening the air supply valve. To the liquid pumping destination via the check valve on the pumping side. It is intended to send.

上記従来の液体圧送装置は、排気弁を開き給気弁を閉じたときに、密閉容器内の復水が再蒸発するために密閉容器内の蒸気の排気に時間が掛かり、流入側逆止弁の開弁が遅れて密閉容器内への液体の流入が遅い問題点があった。密閉容器内への液体の流入が遅いと、単位時間当たりの液体圧送能力が小さくなる。
特開平８−１４５２９０ When the above-mentioned conventional liquid pumping device opens the exhaust valve and closes the air supply valve, the condensate in the sealed container re-evaporates, so it takes time to exhaust the steam in the sealed container, and the inflow side check valve However, there was a problem that the flow of liquid into the sealed container was slow due to the delay of the valve opening. If the flow of the liquid into the sealed container is slow, the liquid pumping capacity per unit time becomes small.
JP-A-8-145290

解決しようとする課題は、排気弁を開き給気弁を閉じたときに、流入側逆止弁を素早く開弁させて密閉容器内の復水の再蒸発を防止できる液体圧送装置を提供することである。   The problem to be solved is to provide a liquid pumping device that can quickly open the inflow side check valve and prevent re-evaporation of the condensate in the sealed container when the exhaust valve is opened and the air supply valve is closed. It is.

本発明は、密閉容器に作動蒸気導入口と作動蒸気排出口と液体流入口及び液体排出口が設けられ、作動蒸気導入口に給気弁が設けられ、作動蒸気排出口に排気弁が設けられ、液体流入口に密閉容器への液体の流れだけを許容する流入側逆止弁が設けられ、液体排出口に液体圧送先への流体の流れだけを許容する圧送側逆止弁が設けられ、密閉容器内に配置されたフロートの昇降に応じてスナップ機構を動作させて動力伝達軸をスナップ移動させることにより、動力伝達軸に連結された給気弁と排気弁の開閉を切り換えて、初めに排気弁を開き給気弁を閉じることにより流入側逆止弁を介して液体を密閉容器内に流入させ、次いで排気弁を閉じ給気弁を開くことにより密閉容器内に溜った液体を圧送側逆止弁を介して液体圧送先へ圧送する液体圧送装置において、動力伝達軸のスナップ移動により排気弁を開き給気弁を閉じたときに動力伝達軸で流入側逆止弁を開くように駆動することを特徴とする。 In the present invention, the closed vessel is provided with a working steam inlet, a working steam outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working steam inlet, and an exhaust valve is provided at the working steam outlet. The liquid inlet has an inflow check valve that allows only the flow of liquid to the sealed container, and the liquid discharge port has a pressure check valve that only allows the flow of fluid to the liquid pressure destination. By operating the snap mechanism in response to the lifting and lowering of the float arranged in the sealed container and snapping the power transmission shaft, the supply valve and exhaust valve connected to the power transmission shaft are switched between opening and closing. Opening the exhaust valve and closing the air supply valve causes the liquid to flow into the sealed container via the inflow side check valve, and then closing the exhaust valve and opening the air supply valve causes the liquid accumulated in the sealed container to be pumped. Liquid to be pumped to liquid pumping destination via check valve In feeding device, and drives to open the inlet-side check valve in the power transmission shaft when closing the air supply valve to open the exhaust valve by a snap movement of the power transmission shaft.

本発明は、排気弁を開き給気弁を閉じたときに、流入側逆止弁を素早く開いて密閉容器内の蒸気を短時間に排気することにより、密閉容器内へ液体を素早く流入させることができ、単位時間当たりの液体圧送能力を大きくできるという優れた効果を生じる。   In the present invention, when the exhaust valve is opened and the air supply valve is closed, the inflow check valve is quickly opened to exhaust the vapor in the sealed container in a short time, thereby allowing the liquid to quickly flow into the sealed container. This produces an excellent effect that the liquid pumping capacity per unit time can be increased.

本発明の液体圧送装置は、動力伝達軸のスナップ移動により排気弁を開き給気弁を閉じたときに動力伝達軸で流入側逆止弁を開くように駆動するものである。そのため、排気弁を開き給気弁を閉じたときに流入側逆止弁を素早く開くことができ、密閉容器内の蒸気と液体流入口側の液体とを置換させて密閉容器内の復水の再蒸発を防止することができる。そのため、密閉容器内の蒸気を短時間に排気して密閉容器内へ液体を素早く流入させることができる。   The liquid pumping device of the present invention is driven to open the inflow check valve on the power transmission shaft when the exhaust valve is opened and the air supply valve is closed by snap movement of the power transmission shaft. Therefore, when the exhaust valve is opened and the air supply valve is closed, the inflow check valve can be opened quickly, and the condensate in the sealed container is replaced by replacing the vapor in the sealed container with the liquid on the liquid inlet side. Re-evaporation can be prevented. Therefore, the vapor in the sealed container can be exhausted in a short time to allow the liquid to flow into the sealed container quickly.

上記の技術的手段の具体例を示す実施例を説明する（図１参照）。本実施例の液体圧送装置１は密閉容器２内にフロート３と切替え弁４及びスナップ機構５が配されたものである。密閉容器２は本体部７と蓋部８が図示しないネジによって結合され、内部に液体溜空間１０が形成されたものである。蓋部８には作動蒸気導入口１１，作動蒸気排出口１３，液体流入口１６，液体排出口１７が設けられている。   An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The liquid pumping apparatus 1 according to the present embodiment has a float 3, a switching valve 4, and a snap mechanism 5 arranged in a sealed container 2. The sealed container 2 has a main body portion 7 and a lid portion 8 connected by screws (not shown), and a liquid reservoir space 10 is formed inside. The lid 8 is provided with a working steam inlet 11, a working steam outlet 13, a liquid inlet 16, and a liquid outlet 17.

作動蒸気導入口１１の内側に給気弁２０が取り付けられ、作動蒸気排出口１３の内側に排気弁２１が取り付けられている。給気弁２０は弁ケース２２と弁体２３及び昇降棒２４によって構成される。弁ケース２２は軸方向に貫通孔を有し、貫通孔の上端面は弁座２５として機能する。弁ケース２２の中間部には前記した貫通孔と外部とを連通する４つの開口２６が設けられている。給気弁２０の弁ケース２２の先端は作動蒸気導入口１１の中にねじ込まれている。弁体２３は球状で作動蒸気導入口１１側にあり、昇降棒２４の上端が当接することにより開閉される。昇降棒２４は弁ケース２２の貫通孔を通って密閉容器２側に抜け、連接板２７に当接するようになっている。連接板２７は動力伝達軸２８に連結され、動力伝達軸２８はスナップ機構５と連結されている。排気弁２１は弁ケース２９と弁体３０と昇降棒３１によって構成される。弁ケース２９は軸方向に貫通孔を有し、貫通孔の内部に弁座３２があり、弁座３２の下から昇降棒３１の上端に保持固定された弁体３０が当接して開閉を行うものである。昇降棒３１の下端はピンで動力伝達軸２８に連結されている。給気弁２０と排気弁２１で切替え弁４が構成され、給気弁２０が開くと排気弁２１は閉じ、給気弁２０が閉じると排気弁２１は開く。 An intake valve 20 is attached inside the working steam inlet 11, and an exhaust valve 21 is attached inside the working steam outlet 13. The air supply valve 20 includes a valve case 22, a valve body 23, and an elevating rod 24. The valve case 22 has a through hole in the axial direction, and the upper end surface of the through hole functions as the valve seat 25. Four openings 26 are provided in the middle portion of the valve case 22 so as to communicate the above-described through holes with the outside. The tip of the valve case 22 of the air supply valve 20 is screwed into the working steam inlet 11. The valve body 23 is spherical and is on the working steam inlet 11 side, and is opened and closed when the upper end of the elevating rod 24 contacts. The lifting / lowering rod 24 passes through the through hole of the valve case 22 to the closed container 2 side and comes into contact with the connecting plate 27. The connecting plate 27 is connected to a power transmission shaft 28, and the power transmission shaft 28 is connected to the snap mechanism 5. The exhaust valve 21 includes a valve case 29, a valve body 30, and an elevating rod 31. The valve case 29 has a through hole in the axial direction, and has a valve seat 32 inside the through hole. The valve body 30 held and fixed to the upper end of the lifting rod 31 from below the valve seat 32 makes contact and opens and closes. Is. The lower end of the elevating bar 31 is connected to the power transmission shaft 28 by a pin. The switching valve 4 is constituted by the air supply valve 20 and the exhaust valve 21, and when the air supply valve 20 is opened, the exhaust valve 21 is closed, and when the air supply valve 20 is closed, the exhaust valve 21 is opened.

フロート３はフロートアーム３４と揺動軸３５を介してブラケット３６によって支持されている。ブラケット３６は図示しないネジによって密閉容器２の蓋部８に一体的に取り付けられている。スナップ機構５はフロートアーム３４と副アーム３７及び圧縮状態のコイルバネ３８によって構成される。フロートアーム３４は平行に対向した２枚の板よりなり、左端にフロート３が固着され、右側部が揺動軸３５によって回転可能に支持されている。従って、フロート３は揺動軸３５を中心として上下に揺動する。フロートアーム３４の中央部に揺動軸３５と平行な第１の軸３９が掛け渡されている。第１の軸３９に第１バネ受け部材４０が回転可能に支持されている。また、揺動軸３５には副アーム３７が回転可能に支持されている。副アーム３７は平行に対向した２枚の板よりなり、左端部に揺動軸３５と平行な第２の軸４１が掛け渡されている。第２の軸４１に第２バネ受け部材４２が回転可能に支持されている。第１及び第２のバネ受け部材４０，４２の間に圧縮状態のコイルバネ３８が配置されている。   The float 3 is supported by a bracket 36 via a float arm 34 and a swing shaft 35. The bracket 36 is integrally attached to the lid portion 8 of the sealed container 2 by screws (not shown). The snap mechanism 5 includes a float arm 34, a sub arm 37, and a coil spring 38 in a compressed state. The float arm 34 is composed of two parallel opposing plates, the float 3 is fixed to the left end, and the right side portion is rotatably supported by the swing shaft 35. Accordingly, the float 3 swings up and down around the swing shaft 35. A first shaft 39 parallel to the swing shaft 35 is stretched around the center of the float arm 34. A first spring receiving member 40 is rotatably supported on the first shaft 39. A sub arm 37 is rotatably supported on the swing shaft 35. The sub arm 37 is composed of two plates facing each other in parallel, and a second shaft 41 parallel to the swing shaft 35 is stretched over the left end portion. A second spring receiving member 42 is rotatably supported on the second shaft 41. A coil spring 38 in a compressed state is disposed between the first and second spring receiving members 40 and 42.

フロートアーム３４には半円状に長孔４３が設けられ、長孔４３内に揺動軸３５と平行なストッパー軸４４がブラケット３６によって支持されている。ストッパー軸４４は副アーム３７の回転範囲を規制する。副アーム３７の右端部に揺動軸３５と平行な連結軸４５が貫通して取り付けられ、連結軸４５に動力伝達軸２８の下端が連結されている。揺動軸３５と平行でフロートアーム３４の揺動範囲を規制するストッパー軸５１，５２がブラケット３６によって支持されている。   The float arm 34 is provided with a semicircular elongated hole 43, and a stopper shaft 44 parallel to the swing shaft 35 is supported by the bracket 36 in the elongated hole 43. The stopper shaft 44 regulates the rotation range of the sub arm 37. A connecting shaft 45 that is parallel to the swing shaft 35 is attached to the right end of the sub arm 37 so as to pass therethrough, and the lower end of the power transmission shaft 28 is connected to the connecting shaft 45. Stopper shafts 51 and 52 that are parallel to the swing shaft 35 and restrict the swing range of the float arm 34 are supported by the bracket 36.

蒸気使用装置等の負荷に接続される液体流入口１６に外部から液体溜空間１０に向かって開く流入側逆止弁６０が設けられる。ボイラー等の液体圧送先へ接続される液体排出口１７に液体溜空間１０から外部に向かって開く圧送側逆止弁６１が設けられる。流入側逆止弁６０は液体流入口１６の内側に位置し、上部がピン６２により回転可能に蓋部８に取り付けられている。流入側逆止弁６０の上端に右方向に伸びる右延長部が形成され、連接板２７の右端に下方に伸びる下延長部が形成されている。流入側逆止弁６０の右延長部の上面に連接板２７の下延長部の下面が当接するようになっている。そのため、動力伝達軸２８のスナップ移動により排気弁２１が開かれ給気弁２０が閉じられるときに、流入側逆止弁６０が開かれるように駆動される。また、動力伝達軸２８のスナップ移動により排気弁２１が閉じられ給気弁２０が開かれると、流入側逆止弁６０が閉じる。   An inflow check valve 60 that opens from the outside toward the liquid storage space 10 is provided at the liquid inlet 16 connected to a load such as a steam using device. A pressure-feed-side check valve 61 that opens from the liquid reservoir space 10 to the outside is provided at the liquid discharge port 17 connected to a liquid pressure-feed destination such as a boiler. The inflow side check valve 60 is located inside the liquid inflow port 16, and the upper part is attached to the lid portion 8 so as to be rotatable by a pin 62. A right extension extending rightward is formed at the upper end of the inflow check valve 60, and a lower extension extending downward is formed at the right end of the connecting plate 27. The lower surface of the lower extension of the connecting plate 27 is in contact with the upper surface of the right extension of the inflow side check valve 60. Therefore, when the exhaust valve 21 is opened and the air supply valve 20 is closed by the snap movement of the power transmission shaft 28, the inflow side check valve 60 is driven to be opened. Further, when the exhaust valve 21 is closed by the snap movement of the power transmission shaft 28 and the air supply valve 20 is opened, the inflow side check valve 60 is closed.

次に本実施例の液体圧送装置１の作用について説明する。まず液体圧送装置１の外部配管は作動蒸気導入口１１が高圧の蒸気源に接続され、作動蒸気排出口１３は蒸気循環配管に接続される。液体流入口１６は蒸気使用装置等の負荷に接続され、液体排出口１７はボイラー等の液体圧送先へ接続される。   Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described. First, the external piping of the liquid pumping apparatus 1 has a working steam inlet 11 connected to a high-pressure steam source, and a working steam discharge port 13 connected to a steam circulation pipe. The liquid inlet 16 is connected to a load such as a steam using device, and the liquid outlet 17 is connected to a liquid pressure destination such as a boiler.

本実施例の液体圧送装置１の液体溜空間１０内に復水が無い場合は、図１に示すようにフロート３は底部に位置する。このとき、切替え弁４における給気弁２０が閉じられ、排気弁２１が開かれている。また、流入側逆止弁６０が開かれ、圧送側逆止弁６１が閉じられている。そして、蒸気使用装置等の負荷内で復水が発生すると、復水は圧送液体流入口１６から液体圧送装置１に流下して、液体溜空間１０内に溜る。液体溜空間１０内に溜った復水によってフロート３が浮上すると、フロートアーム３４が揺動軸３５を中心に時計回り方向に回転し、コイルバネ３８との連結部である第１の軸３９が上方に移動して揺動軸３５と第２の軸４１を結ぶ線の延長線上に近付き、コイルバネ３８が圧縮変形する。そしてフロート３が更に浮上して第１の軸３９が揺動軸３５と第２の軸４１を結ぶ線の延長線上を越えると、コイルバネ３８が急激に変形を回復し、副アーム３７が反時計回り方向に回転して連結軸４５が上方にスナップ移動する。その結果、連結軸４５に連結された動力伝達軸２８が上側にスナップ移動し、給気弁２０が開かれると共に排気弁２１が閉じられる。   When there is no condensate in the liquid reservoir space 10 of the liquid pumping apparatus 1 of this embodiment, the float 3 is located at the bottom as shown in FIG. At this time, the supply valve 20 in the switching valve 4 is closed and the exhaust valve 21 is opened. Further, the inflow side check valve 60 is opened, and the pressure-feed side check valve 61 is closed. When condensate is generated in a load such as a steam using device, the condensate flows down from the pumping liquid inlet 16 to the liquid pumping device 1 and accumulates in the liquid reservoir space 10. When the float 3 rises due to the condensate accumulated in the liquid reservoir space 10, the float arm 34 rotates clockwise about the swing shaft 35, and the first shaft 39, which is a connecting portion with the coil spring 38, moves upward. To the extension line of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 is compressed and deformed. When the float 3 further floats and the first shaft 39 exceeds the extension of the line connecting the oscillating shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 is counterclockwise. The connecting shaft 45 is snapped upward by rotating in the turning direction. As a result, the power transmission shaft 28 connected to the connection shaft 45 snaps upward, and the air supply valve 20 is opened and the exhaust valve 21 is closed.

給気弁２０が開かれて作動蒸気導入口１１が開放されると、密閉容器２内に高圧蒸気が導入され、内部の圧力が上昇し、流入側逆止弁６０が閉じられ、圧送側逆止弁６１が開かれる。液体溜空間１０に溜った復水は、蒸気圧に押されて圧送液体排出口１７から圧送側逆止弁６１を介して外部のボイラーや廃熱利用装置へ排出される。復水の排出によって復水溜空間１０内の水位が低下すると、フロート３が降下して、フロートアーム３４が揺動軸３５を中心に反時計回り方向に回転し、コイルバネ３８との連結部である第１の軸３９が下方に移動して揺動軸３５と第２の軸４１を結ぶ線の延長線上に近付き、コイルバネ３８が圧縮変形する。そしてフロート３が更に降下して第１の軸３９が揺動軸３５と第２の軸４１を結ぶ線の延長線上を越えると、コイルバネ３８が急激に変形を回復し、副アーム３７が時計回り方向に回転して連結軸４５が下方にスナップ移動する。その結果、連結軸４５に連結された動力伝達軸２８が下側にスナップ移動し、給気弁２０が閉じられ排気弁２１が開かれると共に流入側逆止弁６０が開かれる。給気弁２０が閉じられ排気弁２１が開かれると共に流入側逆止弁６０が開かれると、密閉容器２内の蒸気と液体流入口１６側の復水との置換により密閉容器内の復水の再蒸発が防止される。これにより、密閉容器２内の蒸気を短時間に排気して密閉容器２内へ液体を素早く流入させることができる。   When the air supply valve 20 is opened and the working steam inlet 11 is opened, high-pressure steam is introduced into the sealed container 2, the internal pressure rises, the inflow check valve 60 is closed, and the pump-side reverse The stop valve 61 is opened. The condensate collected in the liquid storage space 10 is pushed by the vapor pressure and discharged from the pumped liquid discharge port 17 to the external boiler or the waste heat utilization device through the pumping side check valve 61. When the water level in the condensate reservoir space 10 is lowered due to the discharge of the condensate, the float 3 descends, and the float arm 34 rotates counterclockwise about the swing shaft 35, which is a connecting portion with the coil spring 38. The first shaft 39 moves downward and approaches an extended line connecting the swing shaft 35 and the second shaft 41, and the coil spring 38 is compressed and deformed. When the float 3 further descends and the first shaft 39 exceeds the extension of the line connecting the swing shaft 35 and the second shaft 41, the coil spring 38 suddenly recovers from deformation and the sub arm 37 rotates clockwise. The connecting shaft 45 snaps downward by rotating in the direction. As a result, the power transmission shaft 28 connected to the connection shaft 45 snaps downward, the supply valve 20 is closed, the exhaust valve 21 is opened, and the inflow side check valve 60 is opened. When the supply valve 20 is closed, the exhaust valve 21 is opened, and the inflow side check valve 60 is opened, the condensate in the sealed container is replaced by the replacement of the steam in the sealed container 2 and the condensate on the liquid inlet 16 side. Re-evaporation is prevented. Thereby, the vapor | steam in the airtight container 2 can be exhausted in a short time, and a liquid can be made to flow in into the airtight container 2 quickly.

本発明の実施例の液体圧送装置の断面図。Sectional drawing of the liquid pumping apparatus of the Example of this invention.

符号の説明Explanation of symbols

１ 液体圧送装置
２ 密閉容器
３ フロート
４ 切替え弁
５ スナップ機構
１０ 液体溜空間
１１ 作動蒸気導入口
１３ 作動蒸気排出口
１６ 液体流入口
１７ 液体排出口
２０ 給気弁
２１ 排気弁
２８ 動力伝達軸
６０ 流入側逆止弁
６１ 圧送側逆止弁
DESCRIPTION OF SYMBOLS 1 Liquid pumping apparatus 2 Airtight container 3 Float 4 Switching valve 5 Snap mechanism 10 Liquid storage space 11 Working steam inlet 13 Working steam outlet 16 Liquid inlet 17 Liquid outlet 20 Supply valve 21 Exhaust valve 28 Power transmission shaft 60 Inflow Side check valve 61 Pressure-feed side check valve

Claims (1)

密閉容器に作動蒸気導入口と作動蒸気排出口と液体流入口及び液体排出口が設けられ、作動蒸気導入口に給気弁が設けられ、作動蒸気排出口に排気弁が設けられ、液体流入口に密閉容器への液体の流れだけを許容する流入側逆止弁が設けられ、液体排出口に液体圧送先への流体の流れだけを許容する圧送側逆止弁が設けられ、密閉容器内に配置されたフロートの昇降に応じてスナップ機構を動作させて動力伝達軸をスナップ移動させることにより、動力伝達軸に連結された給気弁と排気弁の開閉を切り換えて、初めに排気弁を開き給気弁を閉じることにより流入側逆止弁を介して液体を密閉容器内に流入させ、次いで排気弁を閉じ給気弁を開くことにより密閉容器内に溜った液体を圧送側逆止弁を介して液体圧送先へ圧送する液体圧送装置において、動力伝達軸のスナップ移動により排気弁を開き給気弁を閉じたときに動力伝達軸で流入側逆止弁を開くように駆動することを特徴とする液体圧送装置。 The closed container is provided with a working steam inlet, a working steam outlet, a liquid inlet and a liquid outlet, a supply valve is provided at the working steam inlet, an exhaust valve is provided at the working steam outlet, and a liquid inlet An inlet check valve that allows only the flow of liquid to the sealed container is provided, and a pressure check valve that allows only the flow of fluid to the liquid pressure destination is provided at the liquid discharge port. The power transmission shaft is snapped by operating the snap mechanism according to the rise and fall of the arranged float, thereby switching the supply valve and exhaust valve connected to the power transmission shaft to open and close, and then opening the exhaust valve first. By closing the air supply valve, the liquid flows into the sealed container via the inflow side check valve, and then closing the exhaust valve and opening the air supply valve causes the liquid accumulated in the sealed container to flow through the pressure side check valve. A liquid pumping device that pumps to a liquid pumping destination There, the liquid pumping apparatus, characterized in that the drive to open the inlet-side check valve in the power transmission shaft when closing the air supply valve to open the exhaust valve by a snap movement of the power transmission shaft.
JP2007159488A 2007-06-15 2007-06-15 Liquid pumping device Expired - Fee Related JP4994966B2 (en)

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JP5208779B2 (en) * 2009-01-15 2013-06-12 株式会社テイエルブイ Liquid pumping device
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JP2010185553A (en) * 2009-02-13 2010-08-26 Tlv Co Ltd Liquid force feed device
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