JP3676484B2 - Liquid pumping device - Google Patents

Liquid pumping device Download PDF

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Publication number
JP3676484B2
JP3676484B2 JP05374596A JP5374596A JP3676484B2 JP 3676484 B2 JP3676484 B2 JP 3676484B2 JP 05374596 A JP05374596 A JP 05374596A JP 5374596 A JP5374596 A JP 5374596A JP 3676484 B2 JP3676484 B2 JP 3676484B2
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Japan
Prior art keywords
valve
air supply
liquid
port
exhaust valve
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JP05374596A
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Japanese (ja)
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JPH09222193A (en
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広谷  昌久
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Tlv Co Ltd
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Tlv Co Ltd
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Description

【0001】
【発明の属する技術分野】
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。
【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。
【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溜め、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。
【0004】
以下従来技術の液体圧送装置について説明する。図3は従来技術の液体圧送装置の一部断面斜視図である。また図4は、従来技術の液体圧送装置の切替え弁部分の拡大断面図である。図3において100は従来技術の液体圧送装置を示す。液体圧送装置100は、密閉容器101内にフロ―ト120、切替え弁130、スナップ機構140等が内蔵されたものである。
【0005】
密閉容器101は、底近くに圧送液体流入口102と、圧送液体排出口103が設けられ、それぞれに逆止弁105,106が取り付けられている。ここで逆止弁105は密閉容器101内への復水の流入を許す向きに取り付けられている。一方逆止弁106は、密閉容器101から外部への復水の圧送を許す向きに取り付けられている。
【0006】
また密閉容器101の頂部には作動流体導入口108と作動流体排出口109が設けられており、それぞれ図3,4の様に、給気弁110と排気弁111からなる切替え弁130が取り付けられている。ここで給気弁110,および排気弁111はいずれも昇降棒112,113を上下移動することによって弁の開閉を行うものであるが、給気弁110は昇降棒112を上げた時に開となり、排気弁111は昇降棒113を上げた時に閉となる。そして昇降棒112,113は連設板115によって並列に結合されており、連設板115を上下することにより給気弁110,排気弁111は同時に開閉される。
【0007】
従来技術の液体圧送装置100は、圧送液体流入口102が逆止弁105を介して蒸気の負荷に接続され、圧送液体排出口103が逆止弁106を介して廃熱利用装置に接続される。そして作動流体導入口108は高圧流体源に接続される。液体圧送装置100では、密閉容器101内に復水が無い場合は、フロ―ト120は下の位置にあり、連設板115は下がっている。そのため、給気弁110では、昇降棒112が下がり、昇降棒112の先端に固定された玉形の給気弁体122が給気弁口123を塞いでいる。一方排気弁111では、昇降棒113の先端に取り付けられた円板状の排気弁体127が排気弁口128を開口し、作動流体排出口109が開放されている。
【0008】
液体圧送装置100が接続される蒸気の負荷内で復水が発生すると、復水は逆止弁105から密閉容器101内に流れ込んで溜まる。そして、復水の量が増加するのに従って、フロ―ト120が上昇し、これに連れてア―ム118の一端が上昇する。そしてア―ム118が一定の位置を越えると、スナップ機構140が反転し、弁軸操作棒121が上に移動し、連設板115が持ち上げられる。
【0009】
すると給気弁110では、連設板115に取り付けられた昇降棒112が上昇し、給気弁体122が給気弁口123を開口し、作動流体導入口108が開放される。一方この時排気弁体127が排気弁口128を塞ぐので、作動流体排出口109は閉じられ、密閉容器101内の圧力が上昇し、当該圧力に押されて圧送液体排出口103から復水が圧送される。
【0010】
【発明が解決しようとする課題】
従来技術の液体圧送装置は、密閉容器内の液面の高さに応じて切替え弁を開閉することにより、効率良く液体の圧送を行うことができるものである。しかしながら、給気弁口を開閉する給気弁体と排気弁口を開閉する排気弁体の2つの弁体、この2つの弁体へ連結する2つの昇降棒、連設板等を必要とし、部品点数が多く構造が複雑であると言う問題点があった。
【0011】
本発明は、従来技術の上記した問題点に注目し、部品点数を減少して簡単な構造の液体圧送装置を提供することを課題とする。
【0012】
【課題を解決するための手段】
本発明の特徴は、密閉容器に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が設けられ、密閉容器内に作動流体導入口の給気弁口を開閉する給気弁体と作動流体排出口の排気弁口を開閉する排気弁体が内蔵され、密閉容器内に溜った液体の液面の高さに応じて、初めに排気弁口を開き給気弁口を閉じて圧送液体流入口から液体を流入させ、次いで排気弁口を閉じ給気弁口を開いて密閉容器内に溜った液体を圧送液体排出口から圧送する液体圧送装置において、給気弁口を開口させた給気弁座とこの給気弁口に対向して排気弁口を開口させた排気弁座を設け、両弁口の間に切替え弁を配置し、切替え弁の一側に排気弁口を開閉する排気弁体としての弁面を他側に給気弁口を開閉する給気弁体としての弁面を設けた液体圧送装置にある。
【0013】
【発明の実施の形態】
本発明の液体圧送装置は、従来公知のそれと同様に、密閉容器内に溜った液体の液面の高さに応じて、切替え弁を開閉することにより液体の圧送を行う。即ち、初めに切替え弁の一側に設けた排気弁体としての弁面が排気弁口を開き他側に設けた給気弁体としての弁面が給気弁口を閉じて圧送液体流入口から液体を流入させ、次いで排気弁体としての弁面が排気弁口を閉じ給気弁体としての弁面が給気弁口を開いて密閉容器内に溜った液体を圧送液体排出口から圧送する。
【0014】
そして本発明の液体圧送装置で採用する切替え弁は、密閉容器内に対向して設けた給気弁口と排気弁口の間に配され、一側に排気弁口を開閉する排気弁体としての弁面が他側に給気弁口を開閉する給気弁体としての弁面が設けられたものであるので、切替え弁へ連結するための連設板等を別途必要とせず、部品点数を減少して簡単な構造の液体圧送装置を作ることができる。
【0015】
【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。また図2は、図1の液体圧送装置の切替え弁部分の拡大断面図である。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及びスナップ機構5が配置されたものである。
【0016】
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。
【0017】
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口20を開口させた給気弁座21がねじ結合されており、この給気弁口20の下方に給気弁口20に対向して排気弁口22を開口させた排気弁座23がねじ結合されている。そして、給気弁口20と排気弁口22の間に切替え弁4が配置されている。ここで切替え弁4は、球状であり、下側に排気弁口22を開閉する排気弁体としての弁面24が上側に給気弁口20を開閉する給気弁体としての弁面25が設けられている。排気弁体としての弁面24が排気弁座23から離座して排気弁口22を開くと給気弁体としての弁面25は給気弁座21に着座して給気弁口20を閉じ、弁面24が排気弁口22を閉じると弁面25は給気弁口20を開く。そして切替え弁4はスナップ機構5と連結されている。
【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。
【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、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は夫々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。レバ―34は、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。レバ―34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の右端部には軸40が掛け渡され、連結棒28の下端が回転可能に支持されている。そして連結棒28の上端は、軸58によって回転可能に支持されている。
【0020】
ブラケット36は上から見ると、「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41,42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、前記した軸37が掛け渡されて連結されたものである。
【0021】
スナップ機構5は、主ア―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。主ア―ム51は、平行に対向した2枚の板よりなり、前記した軸37によって右端部が回転可能に支持されている。また主ア―ム51の左端部は前記した軸58によって回転可能に支持されている。そのため主ア―ム51は、レバ―34と連結棒28を介して、フロ―ト3の浮沈に追従し、軸37を中心として上下に揺動する。
【0022】
前記した軸58にバネ受け部材55が回転可能に支持されている。また、前記した軸37に副ア―ム52の中間部が回転可能に支持されている。副ア―ム52は、平行に対向した2枚の板よりなり、2枚の板の左側部には、軸59が掛け渡され、バネ受け部材56が軸59によって回転可能に支持されている。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。そして副ア―ム52の右端部に軸60が掛け渡され、切替え弁4が取り付けられている。
【0023】
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10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。
【0024】
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における排気弁体としての弁面24が排気弁口22を開き、給気弁体としての弁面25が給気弁口20を閉じている。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。
【0025】
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て軸40が下方へ移動し、連結棒28が下方へ移動して軸58が下方へ移動する。この軸58の下方への移動に連動して、主ア―ム51が軸37を中心に反時計回り方向に回転する。そして軸58が軸37と軸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、軸58が軸37と軸59を結ぶ線上に並び、なおもフロ―ト3が上昇して軸58が軸37と軸59を結ぶ線よりも下方に移動すると、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軸60が下方にスナップ移動する。その結果、軸60に連結された切替え弁4が下側へ移動し、給気弁体としての弁面25が給気弁口20を開き、排気弁体としての弁面24が排気弁口22を閉じる。
【0026】
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。
【0027】
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―34が軸35を中心に反時計回り方向に回転して軸40が上方へ移動し、連結棒28が上方へ移動して軸58が上方へ移動する。この軸58の上方への移動に連動して、主ア―ム51が軸37を中心に時計回り方向に回転する。そして、軸58が軸37と軸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、軸58が軸37と軸59を結ぶ線上に並び、なおもフロ―ト3が降下して軸58が軸37と軸59を結ぶ線よりも上方に移動すると、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軸60が上方にスナップ移動する。その結果、軸60に連結された切替え弁4が上側へ移動し、排気弁体としての弁面24が排気弁口22を開き、給気弁体としての弁面25が給気弁口20を閉じる。
【0028】
【発明の効果】
本発明の液体圧送装置では、密閉容器内に対向して設けた給気弁口と排気弁口の間に切替え弁を配置し、切替え弁の一側に排気弁口を開閉する排気弁体としての弁面を他側に給気弁口を開閉するの給気弁体としての弁面を設けている。そのため切替え弁へ連結するための連設板等を別途必要としない。そのため本発明の液体圧送装置は、部品点数を減少して構造を簡略化できる優れた効果がある。
【図面の簡単な説明】
【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。
【図2】図1の切替え弁部分の拡大断面図である。
【図3】従来技術の液体圧送装置の一部断面斜視図である。
【図4】図3の切替え弁部分の拡大断面図である。
【符号の説明】
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 給気弁口
22 排気弁口
24 排気弁体としての弁面
25 給気弁体としての弁面
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid pumping device that pumps liquid such as water or fuel. The liquid pressure feeding device of the present invention is particularly suitable as a device that once collects the condensate generated in the steam piping system and sends this condensate to a boiler or a waste heat utilization device.
[0002]
[Prior art]
Condensate generated by condensing in the steam piping system still often has a considerable amount of heat. Therefore, for effective use of energy, the condensate is recovered using a liquid pumping device. A condensate recovery system that effectively uses waste heat by sending it to boilers and waste heat utilization devices is widely used.
[0003]
The liquid pumping device used in the condensate recovery system temporarily stores condensate in a sealed container, and further switches the switching valve to introduce a high-pressure working fluid such as steam into the sealed container. Condensate in a sealed container is forcibly discharged.
[0004]
The prior art liquid pumping apparatus will be described below. FIG. 3 is a partial cross-sectional perspective view of a conventional liquid pumping apparatus. FIG. 4 is an enlarged cross-sectional view of a switching valve portion of a conventional liquid pumping device. In FIG. 3, reference numeral 100 denotes a conventional liquid pumping apparatus. The liquid pumping apparatus 100 includes a sealed container 101 in which a float 120, a switching valve 130, a snap mechanism 140, and the like are built.
[0005]
The hermetic container 101 is provided with a pressurized liquid inlet 102 and a pressurized liquid outlet 103 near the bottom, and check valves 105 and 106 are attached to each of them. Here, the check valve 105 is attached in a direction allowing the inflow of condensate into the sealed container 101. On the other hand, the check valve 106 is attached in a direction that allows the condensate to be pumped from the sealed container 101 to the outside.
[0006]
Further, a working fluid inlet 108 and a working fluid outlet 109 are provided at the top of the sealed container 101, and a switching valve 130 including an air supply valve 110 and an exhaust valve 111 is attached as shown in FIGS. ing. Here, the air supply valve 110 and the exhaust valve 111 both open and close by moving the elevating bars 112 and 113 up and down, but the air supply valve 110 is opened when the elevating bar 112 is raised, The exhaust valve 111 is closed when the elevating rod 113 is raised. The elevating rods 112 and 113 are coupled in parallel by the connecting plate 115, and the supply valve 110 and the exhaust valve 111 are simultaneously opened and closed by moving the connecting plate 115 up and down.
[0007]
In the liquid pressure feeding device 100 of the prior art, the pressure feeding liquid inlet 102 is connected to a vapor load via a check valve 105, and the pressure feeding liquid discharge port 103 is connected to a waste heat utilization device via a check valve 106. . The working fluid inlet 108 is connected to a high pressure fluid source. In the liquid pressure feeding device 100, when there is no condensate in the sealed container 101, the float 120 is in the lower position and the connecting plate 115 is lowered. Therefore, in the air supply valve 110, the elevating rod 112 is lowered, and a ball-shaped air supply valve body 122 fixed to the tip of the elevating rod 112 closes the air supply valve port 123. On the other hand, in the exhaust valve 111, a disc-shaped exhaust valve body 127 attached to the tip of the elevating rod 113 opens the exhaust valve port 128, and the working fluid discharge port 109 is opened.
[0008]
When condensate is generated within the steam load to which the liquid pressure feeding device 100 is connected, the condensate flows into the sealed container 101 from the check valve 105 and accumulates. As the amount of condensate increases, the float 120 rises, and one end of the arm 118 rises accordingly. When the arm 118 exceeds a certain position, the snap mechanism 140 is reversed, the valve shaft operating rod 121 moves upward, and the connecting plate 115 is lifted.
[0009]
Then, in the air supply valve 110, the raising / lowering rod 112 attached to the connecting plate 115 rises, the air supply valve body 122 opens the air supply valve port 123, and the working fluid introduction port 108 is opened. On the other hand, since the exhaust valve body 127 closes the exhaust valve port 128 at this time, the working fluid discharge port 109 is closed and the pressure in the hermetic container 101 rises, and the pressure is pushed by the pressure so that condensate is discharged from the pressure liquid discharge port 103. Pumped.
[0010]
[Problems to be solved by the invention]
The liquid pumping device of the prior art can efficiently pump the liquid by opening and closing the switching valve according to the height of the liquid level in the sealed container. However, it requires two valve bodies, an air supply valve body that opens and closes the air supply valve opening and an exhaust valve body that opens and closes the exhaust valve opening, two lifting rods connected to the two valve bodies, a connecting plate, etc. There is a problem that the number of parts is large and the structure is complicated.
[0011]
The present invention pays attention to the above-mentioned problems of the prior art, and an object thereof is to provide a liquid pumping device having a simple structure by reducing the number of parts.
[0012]
[Means for Solving the Problems]
A feature of the present invention is that the air supply port that opens and closes the air supply valve port of the working fluid introduction port in the airtight container is provided with the working fluid introduction port, the working fluid discharge port, the pressure liquid supply port, and the pressure liquid discharge port. An exhaust valve body that opens and closes the valve body and the exhaust valve port of the working fluid discharge port is built-in. Depending on the liquid level of the liquid accumulated in the sealed container, the exhaust valve port is opened first and the air supply valve port is opened. in closed by flowing fluid from the pumping liquid inlet, then a liquid pumping device for pumping accumulated in open closed air supply valve port and the exhaust-valve closed vessel liquid from pumping the liquid outlet, the air supply valve port An open air supply valve seat and an exhaust valve seat with an exhaust valve port opened opposite to the air supply valve port are provided, a switching valve is arranged between both valve ports, and the exhaust valve is located on one side of the switching valve liquid pressure having a valve face of the valve face as the air supply valve element that opens and closes the intake valve port to the other side of the exhaust valve member for opening and closing the mouth Apparatus is in.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The liquid pumping device of the present invention pumps the liquid by opening and closing the switching valve in accordance with the height of the liquid level of the liquid accumulated in the sealed container, as is conventionally known. That is, the valve surface as the exhaust valve body provided on one side of the switching valve first opens the exhaust valve port, and the valve surface as the air supply valve body provided on the other side closes the air supply valve port to press-feed liquid inlet Then, the valve surface as the exhaust valve body closes the exhaust valve port, the valve surface as the air supply valve body opens the air supply valve port, and the liquid accumulated in the sealed container is pumped from the pressure liquid discharge port To do.
[0014]
The switching valve employed in the liquid pressure feeding device of the present invention is disposed between an air supply valve port and an exhaust valve port provided facing each other in the sealed container, and serves as an exhaust valve body that opens and closes the exhaust valve port on one side. Since the valve face is provided with a valve face as an air supply valve body that opens and closes the air supply valve port on the other side, there is no need for a separate connecting plate for connecting to the switching valve, and the number of parts Thus, a liquid pumping device having a simple structure can be produced.
[0015]
【Example】
Specific examples of the present invention will be described below. FIG. 1 is a sectional view of a liquid pumping apparatus according to a specific embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a switching valve portion of the liquid pumping device of FIG. In FIG. 1, a liquid pumping apparatus 1 according to this embodiment is configured such that a float 3, a switching valve 4, and a snap mechanism 5 are disposed in a sealed container 2.
[0016]
If it demonstrates sequentially, the airtight container 2 will couple | bond the main-body part 7 and the cover part 8 with the screw which is not shown in figure, and the liquid storage space 10 is formed in the inside. In the present embodiment, the main body portion 7 of the sealed container 2 is a mere container, and the characteristic components of the present embodiment are generally provided in the lid portion 8 of the sealed container 2. That is, the lid portion 8 is provided with four openings, specifically, a working fluid introduction port 11, a working fluid discharge port 13, a pressure feed liquid inlet 16, and a pressure feed liquid discharge port 17.
[0017]
An air supply valve seat 21 having an air supply valve port 20 opened at a position inside the working fluid introduction port 11, in other words, on the inside of the sealed container 2 is screwed, and an air supply is provided below the air supply valve port 20. An exhaust valve seat 23 having an exhaust valve port 22 opened facing the valve port 20 is screwed. The switching valve 4 is disposed between the supply valve port 20 and the exhaust valve port 22. Here, the switching valve 4 is spherical, and a valve surface 24 as an exhaust valve body for opening and closing the exhaust valve port 22 on the lower side, and a valve surface 25 as an air supply valve body for opening and closing the air supply valve port 20 on the upper side. Is provided. When the valve surface 24 as the exhaust valve body is separated from the exhaust valve seat 23 and the exhaust valve port 22 is opened, the valve surface 25 as the air supply valve body is seated on the air supply valve seat 21 and the air supply valve port 20 is opened. When the valve surface 24 is closed and the exhaust valve port 22 is closed, the valve surface 25 opens the air supply valve port 20. The switching valve 4 is connected to a snap mechanism 5.
[0018]
The pumping liquid inlet 16 is located substantially at the center of the lid portion 8, and the pumping liquid discharge port 17 is provided at a position corresponding to the lower part of the sealed container 2.
[0019]
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 shaft 37. The bracket 36 and the bracket 38 are integrally attached to the lid portion 8 of the sealed container 2 by screws (not shown). The lever 34 is made by bending a plate into a “U” shape, and the two plates face each other in parallel. The float 3 is joined to the bent portion of the lever 34. A shaft 40 is stretched over the right end of the lever 34, and the lower end of the connecting rod 28 is rotatably supported. The upper end of the connecting rod 28 is rotatably supported by a shaft 58.
[0020]
When viewed from above, the bracket 36 is composed of two “L” -shaped plates, and the shafts 41 and 42 and the shaft 35 described above are spanned and connected. The shaft 35 also serves as the rocking shaft of the float 3. The float 3 swings up and down around the shaft 35. The shafts 41 and 42 also serve as upper and lower limit stoppers for the float 3 respectively. On the other hand, the bracket 38 is similarly composed of two “L” -shaped plates, and the above-described shaft 37 is spanned and connected.
[0021]
The snap mechanism 5 includes a main arm 51, a sub arm 52, a coil spring 54 in a compressed state, a spring receiving member 55, and a spring receiving member 56. The main arm 51 is composed of two plates opposed in parallel, and the right end portion is rotatably supported by the shaft 37 described above. The left end of the main arm 51 is rotatably supported by the shaft 58 described above. Therefore, the main arm 51 follows up and down of the float 3 via the lever 34 and the connecting rod 28 and swings up and down around the shaft 37.
[0022]
The spring receiving member 55 is rotatably supported on the shaft 58 described above. Further, the intermediate portion of the sub-arm 52 is rotatably supported on the shaft 37 described above. The sub-arm 52 is composed of two plates facing each other in parallel. A shaft 59 is stretched over the left side of the two plates, and a spring receiving member 56 is rotatably supported by the shaft 59. . A compressed coil spring 54 is attached between the spring receiving members 55 and 56. A shaft 60 is stretched over the right end portion of the sub-arm 52, and the switching valve 4 is attached.
[0023]
Next, the operation of the liquid pumping apparatus 1 of this embodiment will be described by following a series of operation procedures when steam is used as the working fluid. First, in the external piping of the liquid pumping apparatus 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 piping. Further, the pressure liquid inlet 16 is connected to a load such as a vapor using device via a check valve (not shown) that opens from the outside toward the liquid reservoir space 10. On the other hand, the pressure liquid discharge port 17 is connected to a liquid pressure destination such as a boiler through a check valve (not shown) that opens from the liquid reservoir space 10 to the outside.
[0024]
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 valve surface 24 as the exhaust valve body in the switching valve 4 opens the exhaust valve port 22, and the valve surface 25 as the air supply valve body closes the air supply valve port 20. When condensate is generated in a load such as a steam using device, the condensate flows down from the pumped liquid inlet 16 to the liquid pumped device 1 and accumulates in the liquid reservoir space 10.
[0025]
When the float 3 rises due to the condensate accumulated in the liquid reservoir space 10, the lever 34 rotates clockwise about the shaft 35, the shaft 40 moves downward, and the connecting rod 28 moves downward. As a result, the shaft 58 moves downward. In conjunction with the downward movement of the shaft 58, the main arm 51 rotates counterclockwise about the shaft 37. The shaft 58 approaches the line connecting the shaft 37 and the shaft 59, and the coil spring 54 is compressed and deformed. Then, the float 3 is further lifted, the shaft 58 is aligned on the line connecting the shaft 37 and the shaft 59, and the float 3 is still lifted and the shaft 58 is moved below the line connecting the shaft 37 and the shaft 59. As a result, the coil spring 54 suddenly recovers from deformation, the sub-arm 52 rotates clockwise, and the shaft 60 snaps downward. As a result, the switching valve 4 connected to the shaft 60 moves downward, the valve surface 25 as the supply valve body opens the supply valve port 20, and the valve surface 24 as the exhaust valve body opens to the exhaust valve port 22. Close.
[0026]
When the working fluid inlet 11 is opened, high-pressure steam is introduced into the hermetic container 2, the internal pressure rises, and the condensate accumulated in the liquid reservoir space 10 is pushed by the vapor pressure to be pumped liquid outlet. 17 is discharged to an external boiler or waste heat utilization device through a check valve (not shown).
[0027]
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, the lever 34 rotates counterclockwise about the shaft 35, the shaft 40 moves upward, the connecting rod 28 moves upward, and the shaft 58 moves upward. In conjunction with the upward movement of the shaft 58, the main arm 51 rotates clockwise about the shaft 37. Then, the shaft 58 approaches a line connecting the shaft 37 and the shaft 59, and the coil spring 54 is compressed and deformed. Then, the float 3 is further lowered so that the shaft 58 is arranged on a line connecting the shaft 37 and the shaft 59, and the float 3 is lowered so that the shaft 58 is moved above the line connecting the shaft 37 and the shaft 59. Then, the coil spring 54 rapidly recovers from deformation, the sub arm 52 rotates counterclockwise, and the shaft 60 snaps upward. As a result, the switching valve 4 connected to the shaft 60 moves upward, the valve surface 24 as the exhaust valve body opens the exhaust valve port 22, and the valve surface 25 as the air supply valve body opens the air supply valve port 20. close up.
[0028]
【The invention's effect】
In the liquid pumping device of the present invention, a switching valve is disposed between the air supply valve port and the exhaust valve port provided facing each other in the sealed container, and the exhaust valve body opens and closes the exhaust valve port on one side of the switching valve. The valve surface is provided as an air supply valve body for opening and closing the air supply valve port on the other side. Therefore, there is no need for a connecting plate or the like for connecting to the switching valve. Therefore, the liquid pumping apparatus of the present invention has an excellent effect that the number of parts can be reduced and the structure can be simplified.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid pumping apparatus according to a specific embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of a switching valve portion of FIG.
FIG. 3 is a partial cross-sectional perspective view of a prior art liquid pumping device.
4 is an enlarged cross-sectional view of the switching valve portion of FIG. 3;
[Explanation of symbols]
2 Sealed container 3 Float 4 Switching valve 5 Snap mechanism 11 Working fluid inlet 13 Working fluid outlet 16 Pressure liquid inlet 17 Pressure liquid outlet 20 Supply valve port 22 Exhaust valve port 24 Valve surface as an exhaust valve body 25 Valve face as supply valve

Claims (1)

密閉容器に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が設けられ、密閉容器内に作動流体導入口の給気弁口を開閉する給気弁体と作動流体排出口の排気弁口を開閉する排気弁体が内蔵され、密閉容器内に溜った液体の液面の高さに応じて、初めに排気弁口を開き給気弁口を閉じて圧送液体流入口から液体を流入させ、次いで排気弁口を閉じ給気弁口を開いて密閉容器内に溜った液体を圧送液体排出口から圧送する液体圧送装置において、給気弁口を開口させた給気弁座とこの給気弁口に対向して排気弁口を開口させた排気弁座を設け、両弁口の間に切替え弁を配置し、切替え弁の一側に排気弁口を開閉する排気弁体としての弁面を他側に給気弁口を開閉する給気弁体としての弁面を設けたことを特徴とする液体圧送装置。The airtight valve is provided with a working fluid inlet, a working fluid outlet, a pressure liquid inlet and a pressure liquid outlet, and the air supply valve body for opening and closing the air supply valve opening of the working fluid inlet and the working fluid exhaust in the airtight container. An exhaust valve body that opens and closes the outlet exhaust valve port is built-in, and according to the liquid level of the liquid accumulated in the sealed container, the exhaust valve port is opened first and the air supply valve port is closed to press-feed liquid inlet In a liquid pumping device that allows liquid to flow in, then closes the exhaust valve port and opens the air supply valve port to pump the liquid accumulated in the sealed container from the pressure liquid discharge port, the air supply valve with the air supply valve port opened Exhaust valve seat that has an exhaust valve seat that opens the exhaust valve port opposite the seat and this air supply valve port, places a switching valve between both valve ports, and opens and closes the exhaust valve port on one side of the switching valve liquid pressure, characterized in that a valve surface of the valve face of the body as the air supply valve element that opens and closes the intake valve port to the other side Apparatus.
JP05374596A 1996-02-15 1996-02-15 Liquid pumping device Expired - Fee Related JP3676484B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP05374596A JP3676484B2 (en) 1996-02-15 1996-02-15 Liquid pumping device

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Application Number Priority Date Filing Date Title
JP05374596A JP3676484B2 (en) 1996-02-15 1996-02-15 Liquid pumping device

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JPH09222193A JPH09222193A (en) 1997-08-26
JP3676484B2 true JP3676484B2 (en) 2005-07-27

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JP5312975B2 (en) * 2009-02-13 2013-10-09 株式会社テイエルブイ Liquid pumping device

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