JPH08145290A - Fluid pressure transporting device - Google Patents
Fluid pressure transporting deviceInfo
- Publication number
- JPH08145290A JPH08145290A JP30687194A JP30687194A JPH08145290A JP H08145290 A JPH08145290 A JP H08145290A JP 30687194 A JP30687194 A JP 30687194A JP 30687194 A JP30687194 A JP 30687194A JP H08145290 A JPH08145290 A JP H08145290A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- arm
- valve
- float
- axis
- 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.)
- Granted
Links
Landscapes
- Mechanically-Actuated Valves (AREA)
- Float Valves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、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、蒸気配管系で発生した復水を一旦集め、こ
の復水をボイラ―や廃熱利用装置に送る装置として特に
適するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid pumping device for pumping liquid such as water and fuel. The liquid pressure-feeding device of the present invention is particularly suitable as a device for once collecting the condensate generated in the steam piping system and sending the condensate to the boiler or the waste heat utilization device.
【０００２】[0002]
【従来の技術】蒸気配管系で凝縮して発生した復水は、
まだ相当の熱量を有していることが多く、そのためエネ
ルギ―の有効活用のため、液体圧送装置を用いて復水を
回収し、この復水をボイラ―や廃熱利用装置に送って廃
熱を有効利用する復水回収システムが広く普及してい
る。2. Description of the Related Art Condensate generated by condensation in a steam piping system
It still has a considerable amount of heat, so for effective use of energy, condensed water is collected using a liquid pumping device, and this condensed water is sent to a boiler or waste heat utilization device to waste heat. Condensate recovery system that effectively uses water is widely used.
【０００３】復水回収システムに利用される液体圧送装
置は、復水を一旦密閉容器内に回収し、更に切替え弁を
切り換えて密閉容器内に蒸気等の高圧の作動流体を導入
し、この作動流体の圧力によって密閉容器内の復水を強
制的に排出するものである。そのため液体圧送装置を高
効率で稼働させるためには、密閉容器内にできるだけ多
量の復水を溜め、切替え弁を確実に切り換える必要があ
る。A liquid pumping device used in a condensate recovery system temporarily recovers condensate in a closed container, switches a switching valve, and introduces a high-pressure working fluid such as steam into the closed container, and operates this operation. Condensate in the closed container is forcibly discharged by the pressure of the fluid. Therefore, in order to operate the liquid pumping device with high efficiency, it is necessary to collect as much condensed water as possible in the closed container and reliably switch the switching valve.
【０００４】そこで液体圧送装置では、一般にコイルバ
ネを利用したスナップ機構が採用され、切替え弁の切り
換えを確実にすることが行なわれてきた。コイルバネを
利用したスナップ機構を内蔵する液体圧送装置には、例
えば米国特許５１４１４０５号に開示された構成があ
る。Therefore, a liquid pumping device generally employs a snap mechanism utilizing a coil spring to ensure switching of the switching valve. A liquid pressure-feeding device incorporating a snap mechanism using a coil spring has a configuration disclosed in US Pat. No. 5,141,405, for example.
【０００５】図６は従来技術の液体圧送装置のスナップ
機構の正面図である。前記した米国特許５１４１４０５
号に開示された液体圧送装置では、スナップ機構１００
は、フロ―トア―ム１０１、副ア―ム１０２及び圧縮状
態のコイルバネ１０３によって構成される。そしてフロ
―トア―ム１０１は支持部材１０５に対してピン１０６
によって揺動可能に固定され、先端にはフロ―ト１０８
が取り付けられている。FIG. 6 is a front view of a snap mechanism of a prior art liquid pumping device. US Pat. No. 5,141,405 mentioned above.
In the liquid pumping device disclosed in Japanese Patent No.
Is composed of a float arm 101, a sub arm 102, and a coil spring 103 in a compressed state. The float arm 101 is attached to the support member 105 by the pin 106.
It is swingably fixed by the
Is attached.
【０００６】副ア―ム１０２はフロ―トア―ム１０１と
同一のピン１０６で一端が支持部材１０５と結合され、
他端はばね受け部材１１６を介してピン１１０によって
コイルバネ１０３の一端と結合されている。副ア―ム１
０２の中間部にはピン１０７により弁軸操作棒１１１が
連結されている。この弁軸操作棒１１１は図示しない切
替え弁に連結されており、スナップ機構１００は弁軸操
作棒１１１を介して切替え弁とリンクされている。One end of the sub arm 102 is connected to the support member 105 by the same pin 106 as the float arm 101,
The other end is connected to one end of the coil spring 103 by a pin 110 via a spring receiving member 116. Sub Arm 1
A valve shaft operating rod 111 is connected to an intermediate portion of 02 by a pin 107. The valve shaft operating rod 111 is connected to a switching valve (not shown), and the snap mechanism 100 is linked to the switching valve via the valve shaft operating rod 111.
【０００７】また図６におけるコイルバネ１０３の他端
はばね受け部材１１５を介してピン１１２によってフロ
―トア―ム１０１と結合されている。従来技術の液体圧
送装置では、図示しない密閉容器内に復水が溜まるとフ
ロ―ト１０８が浮上し、このフロ―ト１０８の浮上に連
動してコイルバネ１０３のバネ受け部材１１５側が上方
向に移動し、コイルバネ１０３は圧縮変形する。そして
フロ―ト１０８が更に上昇し、コイルバネ１０３と副ア
―ム１０２が直線状に並び、なおもフロ―ト１０８が上
昇してコイルバネ１０３と副ア―ム１０２の角度が１８
０度を越えると、コイルバネ１０３は急激に変形を回復
し、コイルバネ１０３と副ア―ム１０２間の連結部（ピ
ン１１０）は下側にスナップ移動する。その結果、副ア
―ムに連結された弁軸操作棒１１１が下側に移動し、図
示しない切替え弁が急激に切り換えられる。The other end of the coil spring 103 in FIG. 6 is connected to the float arm 101 by a pin 112 via a spring receiving member 115. In the liquid pumping device of the prior art, the float 108 floats when condensed water is accumulated in a closed container (not shown), and the spring receiving member 115 side of the coil spring 103 moves upward in conjunction with the floating of the float 108. Then, the coil spring 103 is compressed and deformed. Then, the float 108 further rises, the coil spring 103 and the sub arm 102 are aligned in a straight line, and the float 108 still rises so that the angle between the coil spring 103 and the sub arm 102 is 18 degrees.
When it exceeds 0 degrees, the coil spring 103 rapidly recovers its deformation, and the connecting portion (pin 110) between the coil spring 103 and the sub arm 102 snaps downward. As a result, the valve shaft operating rod 111 connected to the sub arm moves downward, and the switching valve (not shown) is rapidly switched.
【０００８】[0008]
【発明が解決しようとする課題】従来技術の液体圧送装
置１００は、簡単な構成で比較的効率良く液体の圧送を
行うことができるものであるが、切替え弁を確実に切り
換えるだけの力を得るために、大きな浮力、即ち大きな
フロ―トを必要とする問題があった。これは、従来技術
の液体圧送装置１００では、ピン１０６とピン１１０及
びピン１１２で形成される三角形において、ピン１０６
とピン１１２間の距離がピン１０６とピン１１０間の距
離よりも長く、即ちピン１０６とピン１１２間の距離が
長いものであるために、副ア―ム１０２に伝達するフロ
―トア―ム１０１による浮力の拡大比が小さいためであ
る。またピン１０６とピン１１０間の距離が短いもので
あるために、弁軸操作棒１１１に伝達する副ア―ム１０
２による拡大比も小さいためである。The liquid pumping device 100 of the prior art is capable of pumping liquid relatively efficiently with a simple structure, but obtains a force sufficient to reliably switch the switching valve. Therefore, there is a problem that a large buoyancy, that is, a large float is required. This is because in the prior art liquid pumping device 100, in the triangle formed by the pins 106, 110 and 112, the pin 106
Since the distance between the pin 112 and the pin 112 is longer than the distance between the pin 106 and the pin 110, that is, the distance between the pin 106 and the pin 112 is longer, the floating arm 101 transmitting to the sub arm 102 causes This is because the expansion ratio of buoyancy is small. Further, since the distance between the pin 106 and the pin 110 is short, the auxiliary arm 10 that transmits to the valve shaft operating rod 111.
This is because the enlargement ratio by 2 is also small.
【０００９】本発明は、従来技術の上記した問題点に注
目し、小さな浮力であっても強力な力で切替え弁を切り
換えることができ、動作が確実な液体圧送装置を提供す
ることを目的とする。The present invention focuses on the above-mentioned problems of the prior art, and an object thereof is to provide a liquid pumping device capable of switching the switching valve with a strong force even if the buoyancy is small and the operation is reliable. To do.
【００１０】[0010]
【課題を解決するための技術的手段】本発明の特徴は、
作動流体導入口と作動流体排出口と圧送液体流入口及び
圧送液体排出口を有する密閉容器内にフロ―トと切替え
弁及びスナップ機構が内蔵され、スナップ機構は、密閉
容器内に支持された第１の軸と、前記第１の軸の周りに
回転するフロ―トア―ム及び副ア―ムと、前記第１の軸
から離れた点において前記フロ―トア―ムに支持されて
前記第１の軸と平行な第２の軸と、前記第１の軸から離
れた点において前記副ア―ムに支持されて前記第１の軸
と平行な第３の軸と、前記第２及び第３の軸の間に取り
付けられて両取り付け部が回転可能である圧縮コイルバ
ネを有し、前記フロ―トが前記フロ―トア―ムに連結さ
れ、前記切替え弁が弁軸操作棒を介して前記副ア―ムに
連結された液体圧送装置において、前記第１の軸と前記
第３の軸間の距離を前記第１の軸と前記第２の軸間の距
離よりも長くした液体圧送装置にある。The technical features of the present invention are as follows:
A sealed container having a working fluid inlet, a working fluid outlet, a pressure-feeding liquid inlet, and a pressure-feeding liquid outlet has a float, a switching valve, and a snap mechanism built-in. A first axis, a float arm and a sub-arm that rotates around the first axis, and a first arm supported by the float arm at a point away from the first axis. A second axis parallel to the first axis, a third axis parallel to the first axis supported by the sub-arm at a point distant from the first axis, and the second and third axes. Has a compression coil spring that is mounted between the shafts of both of which is rotatable, the float is connected to the float arm, and the switching valve is connected to the auxiliary shaft via a valve shaft operating rod. In a liquid pumping device connected to an arm, the distance between the first shaft and the third shaft. A liquid pumping device made longer than the distance between said first axis and said second axis.
【００１１】[0011]
【作用】本発明の液体圧送装置は、従来公知のそれと同
様にフロ―トの移動に応じてコイルバネがスナップ移動
し、切替え弁が切り換えられて密閉容器内に溜まった液
体を圧送する。即ち、密閉容器内に復水が溜まるとフロ
―トが浮上し、このフロ―トの浮上に連動してフロ―ト
ア―ムが第１の軸の周りに回転して、フロ―トア―ムと
コイルバネの連結部である第２の軸側が第１の軸と第３
の軸を結ぶ線に近付く方向に移動し、コイルバネは圧縮
変形する。そしてフロ―トが更に上昇し、第２の軸が第
１の軸と第３の軸を結ぶ線上に並び、なおもフロ―トが
上昇して第２の軸が第１の軸と第３の軸を結ぶ線を越え
ると、コイルバネは急激に変形を回復し、コイルバネと
副ア―ム間の連結部である第３の軸が、第１の軸と第２
の軸を結ぶ線に対して初期とは反対側にスナップ移動す
る。その結果、弁軸操作棒が移動し、切替え弁が急激に
切り換えられる。In the liquid pumping device of the present invention, the coil spring snaps in accordance with the movement of the float, and the switching valve is switched to pump the liquid accumulated in the closed container, similarly to the conventionally known device. That is, when condensate collects in the airtight container, the float floats up, and the float arm rotates around the first axis in conjunction with the floating of the float, and the float arm moves. And the second shaft side, which is the connecting portion of the coil spring, is connected to the first shaft and the third shaft.
The coil spring is compressed and deformed by moving in a direction approaching the line connecting the axes. Then the float further rises, the second shaft is aligned on the line connecting the first shaft and the third shaft, and the float still rises so that the second shaft becomes the first shaft and the third shaft. When it goes beyond the line connecting the axes of the coil spring, the coil spring recovers its deformation rapidly, and the third shaft, which is the connecting portion between the coil spring and the sub arm, is connected to the first shaft and the second shaft.
Snap to the side opposite to the initial line with respect to the line connecting the axes. As a result, the valve shaft operating rod moves and the switching valve is rapidly switched.
【００１２】そして本発明の液体圧送装置で採用するス
ナップ機構は、第１の軸と第３の軸間の距離を第１の軸
と第２の軸間の距離よりも長くしたものであるので、即
ち、第１の軸と第２の軸及び第３の軸で形成される三角
形において、第１の軸と第２の軸間の距離が短く、第１
の軸と第３の軸間の距離が長いものであるので、副ア―
ムに伝達するフロ―トア―ムによる浮力の拡大比が大き
くなり、また弁軸操作棒に伝達する副ア―ムによる拡大
比も大きくなる。従って、小さな浮力、即ち小さなフロ
―トを用いたものであっても強力な力で切替え弁を切り
換えることができる。The snap mechanism adopted in the liquid pressure-feeding device of the present invention has a distance between the first shaft and the third shaft longer than that between the first shaft and the second shaft. That is, in the triangle formed by the first axis, the second axis and the third axis, the distance between the first axis and the second axis is short,
Since the distance between the axis of and the third axis is long,
The expansion ratio of the buoyancy due to the float arm transmitted to the valve arm is increased, and the expansion ratio due to the sub arm transmitted to the valve shaft operating rod is also increased. Therefore, even if a small buoyancy, that is, a small float is used, the switching valve can be switched with a strong force.
【００１３】[0013]
【実施例】以下に本発明の具体的実施例について説明す
る。図１は本発明の具体的実施例の液体圧送装置の断面
図である。図２は、図１のスナップ機構の拡大断面図で
ある。図３は、図２のＡ−Ａ断面図である。図１におい
て、本実施例の液体圧送装置１は、密閉容器２内にフロ
―ト３、切替え弁４、スナップ機構５及び弁手段６が配
置されたものである。EXAMPLES Specific examples of the present invention will be described below. FIG. 1 is a sectional view of a liquid pumping device according to a specific embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of the snap mechanism of FIG. FIG. 3 is a sectional view taken along line AA of FIG. In FIG. 1, the liquid pressure-feeding device 1 of this embodiment has a closed container 2 in which a float 3, a switching valve 4, a snap mechanism 5, and a valve means 6 are arranged.
【００１４】順次説明すると、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。本実施例では密
閉容器２の本体部７は単なる容器であり、本実施例の特
徴的な構成要素は、概ね密閉容器２の蓋部８に設けられ
ている。即ち蓋部８には、４つの開口、具体的には作動
流体導入口１１，作動流体排出口１３，圧送液体流入口
１６，圧送液体排出口１７が設けられている。Explaining in sequence, the closed container 2 has a main body 7
The lid portion 8 is joined with a screw (not shown), and the liquid storage space 10 is formed inside. In this embodiment, the main body 7 of the closed container 2 is a simple container, and the characteristic components of this embodiment are generally provided on the lid 8 of the closed container 2. That is, the lid 8 is provided with four openings, specifically, a working fluid introduction port 11, a working fluid discharge port 13, a pressure-feeding liquid inflow port 16, and a pressure-feeding liquid discharge port 17.
【００１５】作動流体導入口１１の内側、言い換えると
密閉容器２内部側の位置に給気弁２０が取り付けられて
おり、作動流体排出口１３の内側には排気弁２１が取り
付けられている。ここで給気弁２０は、弁ケ―ス２２と
弁体２３及び昇降棒２４によって構成される。弁ケ―ス
２２は軸方向に貫通孔を有し、該貫通孔の上端面は弁座
２５として機能する。弁ケ―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。弁体２３は、半球状であり、昇降棒２４の先
端に一体的に取り付けられている。An air supply valve 20 is attached to the inside of the working fluid inlet 11, that is, a position inside the closed container 2, and an exhaust valve 21 is attached to the inside of the working fluid outlet 13. Here, the air supply valve 20 is composed of a valve case 22, a valve body 23, and a lifting 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 a valve seat 25. In the middle portion of the valve case 22, there are provided four openings 26 that communicate the above-mentioned through hole with the outside. The valve element 23 has a hemispherical shape and is integrally attached to the tip of the elevating rod 24.
【００１６】本実施例の液体圧送装置１では、給気弁２
０の弁ケ―ス２２の先端が、作動流体導入口１１の中に
ねじ込まれている。そして弁体２３は作動流体導入口１
１側にあり、昇降棒２４は弁ケ―ス２２の貫通孔を通っ
て密閉容器２側に抜け、連設板２７に当接するようにな
っている。連設板２７は、弁軸操作棒２８に連結されて
いる。さらに弁軸操作棒２８はスナップ機構５と連結さ
れている。In the liquid pumping apparatus 1 of this embodiment, the air supply valve 2
The tip of the 0 valve case 22 is screwed into the working fluid inlet 11. The valve body 23 is the working fluid inlet 1
On the first side, the elevating rod 24 passes through the through hole of the valve case 22 and comes out to the closed container 2 side so as to abut the continuous plate 27. The connecting plate 27 is connected to the valve shaft operating rod 28. Further, the valve shaft operating rod 28 is connected to the snap mechanism 5.
【００１７】排気弁２１は、弁ケ―ス２９と弁体３０と
昇降棒３１によって構成される。弁ケ―ス２９は軸方向
に貫通孔を有し、該貫通孔の内部に弁座３２があり、弁
座３２の下から昇降棒３１の先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。尚、弁軸操作棒
２８と昇降棒３１とはピン３３で連結されている。給気
弁２０と排気弁２１とで切替え弁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。The exhaust valve 21 is composed of a valve case 29, a valve body 30, and a lifting rod 31. The valve case 29 has a through hole in the axial direction, a valve seat 32 is inside the through hole, and a valve body 30 held and fixed to the tip of the elevating rod 31 comes into contact with the valve seat 32 from below. It opens and closes. The valve shaft operating rod 28 and the lifting rod 31 are connected by a pin 33. The supply valve 20 and the exhaust valve 21 constitute the switching valve 4, and when the supply valve 20 opens, the exhaust valve 21 closes, and when the supply valve 20 closes, the exhaust valve 21 opens.
【００１８】圧送液体流入口１６は蓋部８のほぼ中央に
あり、圧送液体排出口１７は密閉容器２の下部に相当す
る位置に設けられている。The pressure-feeding liquid inlet 16 is located substantially in the center of the lid portion 8, and the pressure-feeding liquid outlet 17 is provided at a position corresponding to the lower portion of the closed container 2.
【００１９】フロ―ト３は、レバ―３４及び軸３５を介
してブラケット３６によって支持されており、スナップ
機構５は、第１の軸３７を介してブラケット３８によっ
て支持されている。そしてブラケット３６とブラケット
３８は図示しないネジによって結合され密閉容器２の蓋
部８に一体的に取り付けられている。レバ―３４は、図
３の様に板を「Ｕ」字状に曲げ加工して作られたもので
あり、２枚の板が平行に対向している。そしてレバ―３
４の曲げ加工された部分にフロ―ト３が結合されてい
る。またレバ―３４の他端部には軸４０が取り付けられ
ている。The float 3 is supported by a bracket 36 via a lever 34 and a shaft 35, and the snap mechanism 5 is supported by a bracket 38 via a first shaft 37. The bracket 36 and the bracket 38 are joined by screws (not shown) and integrally attached to the lid portion 8 of the closed container 2. The lever 34 is made by bending a plate into a "U" shape as shown in FIG. 3, and two plates are opposed to each other in parallel. And lever-3
The float 3 is joined to the bent portion of 4. A shaft 40 is attached to the other end of the lever 34.
【００２０】ブラケット３６は上から見ると、図３の様
に「Ｌ」字状をした２枚の板よりなり、軸４１，４２及
び前記した軸３５が掛け渡されて連結されたものであ
る。軸３５はフロ―ト３の揺動軸を兼ねている。フロ―
ト３は軸３５を中心として上下に揺動する。また軸４
１，４２はそれぞれフロ―ト３の上下限のストッパを兼
用している。一方ブラケット３８も同様に、「Ｌ」字状
をした２枚の板よりなり、軸４３及び前記した第１の軸
３７が掛け渡されて連結されたものである。軸４３は下
記の副ア―ム５２のストッパ―を兼ねている。When viewed from above, the bracket 36 is composed of two plates having an "L" shape as shown in FIG. 3, and the shafts 41 and 42 and the shaft 35 are connected to each other. . The shaft 35 also serves as the swing shaft of the float 3. Flow
The gutter 3 swings up and down about the shaft 35. Also axis 4
Reference numerals 1 and 42 also serve as upper and lower limit stoppers for the float 3, respectively. On the other hand, similarly, the bracket 38 is also made up of two "L" -shaped plates, and the shaft 43 and the above-mentioned first shaft 37 are bridged and connected. The shaft 43 also serves as a stopper for the sub arm 52 described below.
【００２１】スナップ機構５は、フロ―トア―ム５１、
副ア―ム５２、圧縮状態のコイルバネ５４、バネ受け部
材５５及びバネ受け部材５６からなるものである。フロ
―トア―ム５１は、図３の様に平行に対向した２枚の板
よりなり、２枚の板の左端部には、溝５７が設けられて
いる。フロ―トア―ム５１は前記した第１の軸３７によ
って右端部が回転可能に支持されている。またフロ―ト
ア―ム５１の溝５７には前記したレバ―３４の軸４０が
嵌合している。そのためフロ―トア―ム５１は、フロ―
ト３の浮沈に追従し、第１の軸３７を中心として上下に
揺動する。The snap mechanism 5 includes a floating arm 51,
The sub arm 52 includes a coil spring 54 in a compressed state, a spring receiving member 55, and a spring receiving member 56. The float arm 51 is composed of two plates facing each other in parallel as shown in FIG. 3, and a groove 57 is provided at the left end portion of the two plates. The right end of the float arm 51 is rotatably supported by the first shaft 37 described above. The shaft 40 of the lever 34 is fitted in the groove 57 of the float arm 51. Therefore, the front arm 51 is
Following ups and downs of the girder 3, it swings up and down about the first shaft 37.
【００２２】フロ―トア―ム５１の右端部は下方に脹
れ、その下端部には、前記した第１の軸３７と平行な第
２の軸５８が掛け渡され、バネ受け部材５５が第２の軸
５８によって回転可能に支持されている。また、前記し
た第１の軸３７に副ア―ム５２の上端部が回転可能に支
持されている。副ア―ム５２は、図３の様に平行に対向
した２枚の板よりなり、夫々の板は逆「Ｌ」字状をして
いる。副ア―ム５２の下端部には、前記した第１及び第
２の軸３７，５８と平行な第３の軸５９が掛け渡され、
バネ受け部材５６が第３の軸５９によって回転可能に支
持されている。そして両バネ受け部材５５，５６の間に
圧縮状態のコイルバネ５４が取り付けられている。また
副ア―ム５２の上左端部に軸６０が掛け渡され、弁軸操
作棒２８の下端が連結されている。フロ―トア―ム５１
には、軸６０の動きを妨げないように、窓８１が開けら
れている。The right end of the float arm 51 expands downward, and the second shaft 58 parallel to the above-mentioned first shaft 37 is stretched over the lower end thereof, and the spring receiving member 55 is arranged at the first end. It is rotatably supported by two shafts 58. The upper end of the sub arm 52 is rotatably supported by the first shaft 37. The sub arm 52 is composed of two plates facing each other in parallel as shown in FIG. 3, and each plate has an inverted "L" shape. A third shaft 59, which is parallel to the first and second shafts 37 and 58, is stretched around the lower end of the sub arm 52.
The spring bearing member 56 is rotatably supported by the third shaft 59. The compressed coil spring 54 is attached between the spring receiving members 55 and 56. A shaft 60 is bridged over the upper left end of the sub arm 52, and the lower end of the valve shaft operating rod 28 is connected to the shaft 60. Front arm 51
A window 81 is opened in the shaft so as not to hinder the movement of the shaft 60.
【００２３】圧送液体排出口１７の液体溜空間１０側に
は、複座弁である弁手段６が設けられている。弁手段６
は、上下弁ケ―ス６１，６２と上下弁体６３，６４及び
排水弁軸７１とからなるものである。上弁ケ―ス６１と
下弁ケ―ス６２は図示しないネジによって固着され、上
弁ケ―ス６１が図示しないネジによって蓋部８に固着さ
れている。上弁ケ―ス６１には上弁座６６が形成され、
下弁ケ―ス６２には下弁座６７が形成されている。上弁
体６３に連結棒６５がねじ結合され、ナット６８で緩み
止めされている。上弁体６３の下部軸部に下弁体６４
が、連結管６９で一定間隔隔てられて、ねじ結合されて
いる。A valve means 6 which is a double-seat valve is provided on the liquid reservoir space 10 side of the pressure-feeding liquid discharge port 17. Valve means 6
Is composed of upper and lower valve cases 61 and 62, upper and lower valve bodies 63 and 64, and a drain valve shaft 71. The upper valve case 61 and the lower valve case 62 are fixed to each other by screws (not shown), and the upper valve case 61 is fixed to the lid portion 8 by screws (not shown). An upper valve seat 66 is formed on the upper valve case 61,
A lower valve seat 67 is formed on the lower valve case 62. A connecting rod 65 is screwed to the upper valve body 63, and is prevented from loosening by a nut 68. The lower valve body 64 is attached to the lower shaft of the upper valve body 63.
Are threadedly connected to each other by a connecting pipe 69 at regular intervals.
【００２４】連結棒６５の上端は軸７０によって揺動可
能に排水弁軸７１に連結され、さらに排水弁軸７１の上
端は、フロ―トア―ム５１に軸７２によって揺動可能に
連結されている。上下弁体６３，６４は、フロ―ト３の
上昇に応じて下方に移動し、液体溜空間１０と圧送液体
排出口１７とを連通すると共に、フロ―トの降下に応じ
て上方に移動し、図１に示す様に液体溜空間１０と圧送
液体排出口１７とを遮断するものである。The upper end of the connecting rod 65 is swingably connected to a drain valve shaft 71 by a shaft 70, and the upper end of the drain valve shaft 71 is swingably connected to a float arm 51 by a shaft 72. There is. The upper and lower valve bodies 63 and 64 move downward as the float 3 rises, connect the liquid reservoir space 10 and the pressure-feeding liquid discharge port 17, and move upward as the float descends. As shown in FIG. 1, the liquid storage space 10 and the pressure-feeding liquid discharge port 17 are shut off from each other.
【００２５】次に本実施例の液体圧送装置１の作用につ
いて、作動流体として蒸気を用いた場合の一連の動作手
順を追うことによって説明する。まず液体圧送装置１の
外部配管は、作動流体導入口１１が高圧の蒸気源に接続
され、作動流体排出口１３は、蒸気循環配管に接続され
る。また圧送液体流入口１６は、外部から液体溜空間１
０に向かって開く逆止弁（図示せず）を介して蒸気使用
装置等の負荷に接続される。一方圧送液体排出口１７
は、液体溜空間１０から外部に向かって開く逆止弁（図
示せず）を介してボイラ―等の液体圧送先へ接続され
る。Next, the operation of the liquid pressure-feeding device 1 of the present embodiment will be described by following a series of operation procedures when steam is used as the working fluid. First, in the external pipe of the liquid pumping device 1, the working fluid introduction port 11 is connected to a high-pressure steam source, and the working fluid discharge port 13 is connected to the steam circulation pipe. In addition, the pressure-feeding liquid inlet 16 is provided from the outside with the liquid storage space 1
It is connected to a load such as a steam using device via a check valve (not shown) which opens toward 0. Meanwhile, the pressure-feeding liquid discharge port 17
Is connected to a liquid pressure destination such as a boiler via a check valve (not shown) that opens outward from the liquid storage space 10.
【００２６】本実施例の液体圧送装置１の液体溜空間１
０内に復水が無い場合は、図１に示す様にフロ―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。また弁手
段６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内に溜まる。Liquid reservoir space 1 of liquid pumping device 1 of this embodiment
When there is no condensate in 0, the float 3 is located at the bottom as shown in FIG. At this time, the air supply valve 20 in the switching valve 4 is closed and the exhaust valve 21 is opened. Further, the valve means 6 is closed. When condensate is generated in the load of the steam using device or the like, the condensate flows down from the pressure-feeding liquid inlet 16 to the liquid pressure-feeding device 1 and is accumulated in the liquid reservoir space 10.
【００２７】液体溜空間１０内に溜まった復水によって
フロ―ト３が浮上すると、レバ―３４が軸３５を中心に
時計回り方向に回転し、排水弁軸７１との連結部である
軸７２が下方に移動し、排水弁軸７１及び連結棒６５を
介して上下弁体６３，６４が下方に移動し、弁手段６２
が開弁する。When the float 3 floats up due to the condensed water stored in the liquid storage space 10, the lever 34 rotates in the clockwise direction around the shaft 35, and the shaft 72 which is a connecting portion with the drain valve shaft 71. Moves downward, the upper and lower valve bodies 63, 64 move downward via the drain valve shaft 71 and the connecting rod 65, and the valve means 62
Opens.
【００２８】一方スナップ機構５側では、レバ―３４の
回転による軸４０の下方への移動に連動して、フロ―ト
ア―ム５１が第１の軸３７を中心に反時計回り方向に回
転し、コイルバネ５４との連結部である第２の軸５８が
右方に移動して第１の軸３７と第３の軸５９を結ぶ線に
近付き、コイルバネ５４は圧縮変形する。そしてフロ―
ト３が更に上昇し、第２の軸５８が第１の軸３７と第３
の軸５９を結ぶ線上に並び、なおもフロ―ト３が上昇し
て第２の軸５８が第１の軸３７と第３の軸５９を結ぶ線
よりも右方に移動すると、コイルバネ５４は急激に変形
を回復し、副ア―ム５２が時計回り方向に回転して第３
の軸５９が左方にスナップ移動する。その結果、副ア―
ム５２の軸６０に連結された弁軸操作棒２８が上側に移
動し、給気弁２０が開口されると共に排気弁２１が閉じ
られる。On the other hand, on the snap mechanism 5 side, the float arm 51 rotates counterclockwise about the first shaft 37 in conjunction with the downward movement of the shaft 40 by the rotation of the lever 34. The second shaft 58, which is the connecting portion with the coil spring 54, moves to the right to approach the line connecting the first shaft 37 and the third shaft 59, and the coil spring 54 is compressed and deformed. And flow
3 further rises, and the second shaft 58 and the third shaft 37
When the second shaft 58 moves to the right of the line connecting the first shaft 37 and the third shaft 59, the coil spring 54 becomes The deformation suddenly recovers, the sub arm 52 rotates clockwise, and the third arm
Axis 59 snaps to the left. As a result,
The valve shaft operating rod 28 connected to the shaft 60 of the valve 52 moves upward, the air supply valve 20 is opened, and the exhaust valve 21 is closed.
【００２９】作動流体導入口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、
液体溜空間１０に溜まった復水は、蒸気圧に押されて圧
送液体排出口１７から図示しない逆止弁を介して外部の
ボイラ―や廃熱利用装置へ排出される。When the working fluid introducing port 11 is opened, high-pressure steam is introduced into the closed container 2 to increase the internal pressure,
The condensed water stored in the liquid storage space 10 is pushed by the vapor pressure and is discharged from the pressure-feeding liquid discharge port 17 to an external boiler or a waste heat utilization device via a check valve (not shown).
【００３０】復水を排出した結果復水溜空間１０内の水
位が低下し、フロ―ト３が降下する。すると、レバ―３
４が軸３５を中心に反時計回り方向に回転し、排水弁軸
７１との連結部である軸７２が上方に移動し、先とは全
く逆の経路をたどり、弁手段６２が閉弁する。As a result of discharging the condensate, the water level in the condensate reservoir space 10 is lowered and the float 3 is lowered. Then Lever 3
4 rotates in the counterclockwise direction around the shaft 35, the shaft 72 that is the connecting portion with the drain valve shaft 71 moves upward, and follows a path that is completely opposite to the above, and the valve means 62 closes. .
【００３１】一方スナップ機構５側では、レバ―３４の
回転による軸４０の上方への移動に連動して、フロ―ト
ア―ム５１が第１の軸３７を中心に時計回り方向に回転
し、コイルバネ５４との連結部である第２の軸５８が左
方に移動して第１の軸３７と第３の軸５９を結ぶ線に近
付き、コイルバネ５４は圧縮変形する。そしてフロ―ト
３が更に降下し、第２の軸５８が第１の軸３７と第３の
軸５９を結ぶ線上に並び、なおもフロ―ト３が降下して
第２の軸５８が第１の軸３７と第３の軸５９を結ぶ線よ
りも左方に移動すると、コイルバネ５４は急激に変形を
回復し、副ア―ム５２が反時計回り方向に回転して第３
の軸５９が右方にスナップ移動する。その結果、副ア―
ム５２の軸６０に連結された弁軸操作棒２８が下側に移
動し、給気弁２０が閉じ、排気弁２１が開口する。On the other hand, on the side of the snap mechanism 5, the float arm 51 rotates clockwise about the first shaft 37 in conjunction with the upward movement of the shaft 40 due to the rotation of the lever 34, The second shaft 58, which is a connecting portion with the coil spring 54, moves to the left to approach the line connecting the first shaft 37 and the third shaft 59, and the coil spring 54 is compressed and deformed. Then, the float 3 is further lowered, the second shaft 58 is aligned on the line connecting the first shaft 37 and the third shaft 59, and the float 3 is still lowered and the second shaft 58 is moved to the first shaft 58. When it moves to the left of the line connecting the first shaft 37 and the third shaft 59, the coil spring 54 suddenly recovers from the deformation, and the sub arm 52 rotates counterclockwise to move the third shaft.
Axis 59 snaps to the right. As a result,
The valve shaft operating rod 28 connected to the shaft 60 of the valve 52 moves downward, the air supply valve 20 closes, and the exhaust valve 21 opens.
【００３２】以上の実施例では、フロ―ト３は、レバ―
３４を介してフロ―トア―ム５１に連結した。次にフロ
―ト３を直接フロ―トア―ムに連結する構成について説
明する。尚、以下に述べる実施例では、先の実施例と同
一の作用を行う部材に付いては同一の番号を付し、重複
説明を避けることとする。In the above embodiment, the float 3 is a lever.
It was connected to the front arm 51 through 34. Next, a structure in which the float 3 is directly connected to the float arm will be described. In the embodiments described below, members having the same functions as those of the previous embodiments are designated by the same reference numerals, and duplicate description will be avoided.
【００３３】図４は本発明の具体的実施例の液体圧送装
置で採用するスナップ機構の図２と同様な拡大断面図で
ある。図５は、図４のＢ−Ｂ断面図である。FIG. 4 is an enlarged sectional view similar to FIG. 2 of the snap mechanism adopted in the liquid pressure-feeding device of the specific embodiment of the present invention. FIG. 5 is a sectional view taken along line BB of FIG.
【００３４】フロ―ト３は、フロ―トア―ム５１及び第
１の軸３７を介してブラケット３６によって支持されて
おり、スナップ機構５は、前記した第１の軸３７を介し
てブラケット３６によって支持されている。そしてブラ
ケット３６は密閉容器の蓋部に一体的に取り付けられて
いる。ブラケット３６は上から見ると、図５の様に
「Ｌ」字状をした２枚の板よりなり、軸４３及び前記し
た第１の軸３７が掛け渡されて連結されたものである。
軸４３は下記の副ア―ム５２のストッパ―を兼ねてい
る。The float 3 is supported by the bracket 36 via the float arm 51 and the first shaft 37, and the snap mechanism 5 is supported by the bracket 36 via the above-mentioned first shaft 37. It is supported. The bracket 36 is integrally attached to the lid of the closed container. When viewed from above, the bracket 36 is composed of two "L" -shaped plates as shown in FIG. 5, and the shaft 43 and the above-mentioned first shaft 37 are bridged and connected.
The shaft 43 also serves as a stopper for the sub arm 52 described below.
【００３５】スナップ機構５は、フロ―トア―ム５１、
副ア―ム５２、圧縮状態のコイルバネ５４、バネ受け部
材５５及びバネ受け部材５６からなるものである。フロ
―トア―ム５１は、図５の様に板を「Ｕ」字状に曲げ加
工して作られたものであり、２枚の板が平行に対向して
いる。そしてフロ―トア―ム５１の曲げ加工された部分
にフロ―ト３が結合されている。フロ―ト３は前記した
第１の軸３７を中心として上下に揺動する。The snap mechanism 5 includes a floating arm 51,
The sub arm 52 includes a coil spring 54 in a compressed state, a spring receiving member 55, and a spring receiving member 56. The front arm 51 is made by bending a plate into a "U" shape as shown in FIG. 5, and two plates are opposed to each other in parallel. The float 3 is joined to the bent portion of the float arm 51. The float 3 swings up and down about the first shaft 37 described above.
【００３６】フロ―トア―ム５１の右端部は右下方に脹
れ、その右端部には、前記した第１の軸３７と平行な第
２の軸５８が掛け渡され、バネ受け部材５５が第２の軸
５８によって回転可能に支持されている。また、前記し
た第１の軸３７に副ア―ム５２の上端部が回転可能に支
持されている。副ア―ム５２は、図５の様に平行した２
枚の板よりなり、夫々の板は逆「Ｌ」字状をしている。
副ア―ム５２の下端部には、前記した第１及び第２の軸
３７，５８と平行な第３の軸５９が掛け渡され、バネ受
け部材５６が第３の軸５９によって回転可能に支持され
ている。そして両バネ受け部材５５，５６の間に圧縮状
態のコイルバネ５４が取り付けられている。また副ア―
ム５２の上中間部に軸６０が掛け渡され、弁軸操作棒２
８の下端が連結されている。The right end of the float arm 51 expands to the lower right, and a second shaft 58 parallel to the above-mentioned first shaft 37 is stretched over the right end of the float arm 51 to form a spring receiving member 55. It is rotatably supported by the second shaft 58. The upper end of the sub arm 52 is rotatably supported by the first shaft 37. The sub-arm 52 is parallel 2 as shown in FIG.
It consists of a number of plates, each plate having an inverted "L" shape.
A third shaft 59, which is parallel to the first and second shafts 37 and 58, is stretched around the lower end of the sub arm 52, and the spring receiving member 56 is rotatable by the third shaft 59. It is supported. The compressed coil spring 54 is attached between the spring receiving members 55 and 56. Also deputy
The shaft 60 is stretched over the upper middle portion of the valve 52, and the valve shaft operating rod 2
The lower ends of 8 are connected.
【００３７】本実施例のスナップ機構５の動作を説明す
る。フロ―ト３が浮上すると、フロ―トア―ム５１が第
１の軸３７を中心に時計回り方向に回転し、コイルバネ
５４との連結部である第２の軸５８が左方に移動して第
１の軸３７と第３の軸５９を結ぶ線に近付き、コイルバ
ネ５４は圧縮変形する。そしてフロ―ト３が更に上昇
し、第２の軸５８が第１の軸３７と第３の軸５９を結ぶ
線上に並び、なおもフロ―ト３が上昇して第２の軸５８
が第１の軸３７と第３の軸５９を結ぶ線よりも左方に移
動すると、コイルバネ５４は急激に変形を回復し、副ア
―ム５２が反時計回り方向に回転して第３の軸５９が右
方にスナップ移動する。その結果、副ア―ム５２の軸６
０に連結された弁軸操作棒２８が上側に移動する。The operation of the snap mechanism 5 of this embodiment will be described. When the float 3 floats, the float arm 51 rotates clockwise around the first shaft 37, and the second shaft 58, which is a connecting portion with the coil spring 54, moves to the left. When approaching the line connecting the first shaft 37 and the third shaft 59, the coil spring 54 is compressed and deformed. Then, the float 3 further rises, the second shaft 58 is lined up on the line connecting the first shaft 37 and the third shaft 59, and the float 3 still rises and the second shaft 58 rises.
When is moved to the left of the line connecting the first shaft 37 and the third shaft 59, the coil spring 54 suddenly recovers its deformation, and the sub arm 52 rotates counterclockwise to move the third shaft. The shaft 59 snaps to the right. As a result, the axis 6 of the sub arm 52
The valve shaft operating rod 28 connected to 0 moves upward.
【００３８】[0038]
【発明の効果】本発明の液体圧送装置では、第１の軸と
第３の軸間の距離を第１の軸と第２の軸間の距離よりも
長くしている。そのため第１の軸と第２の軸間の距離を
短く、第１の軸と第３の軸間の距離を長くでき、副ア―
ムに伝達するフロ―トア―ムによる浮力の拡大比が大き
くなり、また弁軸操作棒に伝達する副ア―ムによる拡大
比も大きくなる。そのため本発明の液体圧送装置は、小
さなフロ―トを用いたものであっても強力な力で切替え
弁を切り換えて、確実に液体を圧送できる優れた効果が
ある。In the liquid pumping device of the present invention, the distance between the first shaft and the third shaft is made longer than the distance between the first shaft and the second shaft. Therefore, the distance between the first axis and the second axis can be shortened, and the distance between the first axis and the third axis can be lengthened.
The expansion ratio of the buoyancy due to the float arm transmitted to the valve arm is increased, and the expansion ratio due to the sub arm transmitted to the valve shaft operating rod is also increased. Therefore, the liquid pumping device of the present invention has an excellent effect that the switching valve can be switched with a strong force to reliably pump the liquid even if a small float is used.
【図１】本発明の具体的実施例の液体圧送装置の断面図
である。FIG. 1 is a sectional view of a liquid pumping device according to a specific embodiment of the present invention.
【図２】図１のスナップ機構の拡大断面図である。FIG. 2 is an enlarged cross-sectional view of the snap mechanism of FIG.
【図３】図２のＡ−Ａ断面図である。FIG. 3 is a sectional view taken along line AA of FIG. 2;
【図４】本発明の具体的実施例の液体圧送装置で採用す
る他のスナップ機構の断面図である。FIG. 4 is a cross-sectional view of another snap mechanism used in the liquid pumping device according to the specific embodiment of the present invention.
【図５】図４のＢ−Ｂ断面図である。FIG. 5 is a sectional view taken along line BB of FIG. 4;
【図６】従来技術の液体圧送装置におけるスナップ機構
の断面図である。FIG. 6 is a cross-sectional view of a snap mechanism in a conventional liquid pumping device.
２ 密閉容器 ３ フロ―ト ４ 切替え弁 ５ スナップ機構 １１ 作動流体導入口 １３ 作動流体排出口 １６ 圧送液体流入口 １７ 圧送液体排出口 ２０ 給気弁 ２１ 排気弁 ２８ 弁軸操作棒 ３７ 第１の軸 ５１ フロ―トア―ム ５２ 副ア―ム ５４ 圧縮状態のコイルバネ ５８ 第２の軸 ５９ 第３の軸 2 Airtight container 3 Float 4 Switching valve 5 Snap mechanism 11 Working fluid inlet 13 Working fluid discharge port 16 Pressurized liquid inlet 17 Pressurized liquid discharge port 20 Air supply valve 21 Exhaust valve 28 Valve shaft operating rod 37 First shaft 51 Float Arm 52 Sub Arm 54 Compressed Coil Spring 58 Second Axis 59 Third Axis
Claims (1)
液体流入口及び圧送液体排出口を有する密閉容器内にフ
ロ―トと切替え弁及びスナップ機構が内蔵され、スナッ
プ機構は、密閉容器内に支持された第１の軸と、前記第
１の軸の周りに回転するフロ―トア―ム及び副ア―ム
と、前記第１の軸から離れた点において前記フロ―トア
―ムに支持されて前記第１の軸と平行な第２の軸と、前
記第１の軸から離れた点において前記副ア―ムに支持さ
れて前記第１の軸と平行な第３の軸と、前記第２及び第
３の軸の間に取り付けられて両取り付け部が回転可能で
ある圧縮コイルバネを有し、前記フロ―トが前記フロ―
トア―ムに連結され、前記切替え弁が弁軸操作棒を介し
て前記副ア―ムに連結された液体圧送装置において、前
記第１の軸と前記第３の軸間の距離を前記第１の軸と前
記第２の軸間の距離よりも長くしたことを特徴とする液
体圧送装置。1. A float, a switching valve, and a snap mechanism are built in a closed container having a working fluid inlet, a working fluid outlet, a pressure-feeding liquid inlet, and a pressure-feeding liquid outlet, and the snap mechanism is inside the closed container. A first shaft supported on the first shaft, a float arm and a sub-arm rotating about the first shaft, and a support on the float arm at a point distant from the first shaft. A second axis parallel to the first axis, a third axis parallel to the first axis supported by the sub-arm at a point away from the first axis, The float has a compression coil spring mounted between the second and third shafts and rotatable in both mounting portions.
In a liquid pumping device connected to a torch and the switching valve connected to the sub-arm via a valve shaft operating rod, the distance between the first shaft and the third shaft is set to the first shaft. The liquid pumping device is characterized in that it is longer than the distance between the shaft and the second shaft.
Priority Applications (20)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30687194A JP3273347B2 (en) | 1994-11-15 | 1994-11-15 | Liquid pumping device |
| US08/529,966 US5655888A (en) | 1994-10-14 | 1995-09-19 | Pump and combination pump and trap with snap-over mechanism and double-seal outlet valve |
| TW084110117A TW342423B (en) | 1994-10-14 | 1995-09-27 | Pump and over-center snap mechanism |
| AU33000/95A AU681540B2 (en) | 1994-10-14 | 1995-09-29 | Pump and over-centre snap link |
| DE1995635497 DE69535497T2 (en) | 1994-10-14 | 1995-10-11 | Pump and self-locking snap connection |
| EP02078275A EP1265013B1 (en) | 1994-10-14 | 1995-10-11 | Pump and over-center snap link |
| DK95202747T DK0709607T3 (en) | 1994-10-14 | 1995-10-11 | Pump and self-inhibiting snap connection |
| BR9504388A BR9504388A (en) | 1994-10-14 | 1995-10-11 | Pump and over-center spring linkage |
| DE1995634070 DE69534070T2 (en) | 1994-10-14 | 1995-10-11 | Pump and self-locking snap connection |
| DE1995629875 DE69529875T2 (en) | 1994-10-14 | 1995-10-11 | Pump and self-locking snap connection |
| EP02078276A EP1265014B1 (en) | 1994-10-14 | 1995-10-11 | Pump and over-center snap link |
| EP19950202747 EP0709607B1 (en) | 1994-10-14 | 1995-10-11 | Pump and over-center snap link |
| ES95202747T ES2194886T3 (en) | 1994-10-14 | 1995-10-11 | PUMP AND DISCENTRATED INSTANT CLOSURE CONNECTION. |
| NO954065A NO309624B1 (en) | 1994-10-14 | 1995-10-13 | Pump with snap joint device |
| KR1019950035491A KR0157722B1 (en) | 1994-10-14 | 1995-10-14 | Pump and combination pump and trap with snap-over mechanism and double seal outlet valve |
| CN95109585A CN1069956C (en) | 1994-10-14 | 1995-10-16 | Pump and over-center snap link |
| CA 2160629 CA2160629C (en) | 1994-10-14 | 1995-10-16 | Pump and over-center snap link |
| US08/735,302 US5755560A (en) | 1994-10-14 | 1996-10-22 | Pump and combination pump and trap with snap-over mechanism and double-seal outlet valve |
| AU16223/97A AU683200B2 (en) | 1994-10-14 | 1997-03-11 | Pump and over-center snap link |
| US08/908,849 US6244828B1 (en) | 1994-10-14 | 1997-08-08 | Pump and combination pump and trap with snap-over mechanism and double-seal outlet valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30687194A JP3273347B2 (en) | 1994-11-15 | 1994-11-15 | Liquid pumping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08145290A true JPH08145290A (en) | 1996-06-07 |
| JP3273347B2 JP3273347B2 (en) | 2002-04-08 |
Family
ID=17962258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30687194A Expired - Lifetime JP3273347B2 (en) | 1994-10-14 | 1994-11-15 | Liquid pumping device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3273347B2 (en) |
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