JP2007046738A

JP2007046738A - Liquid force feed apparatus

Info

Publication number: JP2007046738A
Application number: JP2005233254A
Authority: JP
Inventors: Masahisa Hiroya; 昌久広谷
Original assignee: TLV Co Ltd
Current assignee: TLV Co Ltd
Priority date: 2005-08-11
Filing date: 2005-08-11
Publication date: 2007-02-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid force feed apparatus rapidly switching opening and closing of a feed valve and a discharge valve by a simple structure with a reduced number of parts. <P>SOLUTION: A float 3 inside a sealed vessel 2 having a working fluid introduction port 11, a working fluid discharge port 13, a pressure feed liquid inflow port 16, and a pressure feed liquid discharge port 17, a switching valve 22 composed of the feed valve and the discharge valve, and a snap mechanism 5 having a coil spring 52, are incorporated in the liquid force feed apparatus 1. One end of the coil spring 52 is connected to the float 3. The other end of the coil spring 52 is connected to the switching valve 22 which also serves as the feed valve and the discharge valve. Because the switching valve 22 also serves as the feed valve and the discharge valve, either one of the feed valve and the discharge valve is eliminated, and the structure is simplified by reducing the number of part items. <P>COPYRIGHT: (C)2007,JPO&INPIT

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、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ートと、給気弁と排気弁からなる切替え弁と、コイルバネを有するスナップ機構が内蔵され、フロートにコイルバネの一端が連結された液体圧送装置において、コイルバネの他端に給気弁と排気弁を連結したものである。 A conventional liquid pumping device has a float, a switching valve composed of an air supply valve and an exhaust valve, and a coil spring in a sealed container having a working fluid introduction port, a working fluid discharge port, a pumping liquid inlet and a pumping liquid discharge port. In a liquid pumping apparatus having a snap mechanism built-in and one end of a coil spring connected to a float, an air supply valve and an exhaust valve are connected to the other end of the coil spring.

上記従来の液体圧送装置は、スナップ機構によって給気弁と排気弁の開閉を急激に切り換えるものであるので、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、給気弁と排気弁の２つの弁を必要とするために、部品点数が多くなるという問題点があった。
特開平１０−３０７９２号公報 Since the conventional liquid pumping apparatus switches the opening and closing of the air supply valve and the exhaust valve abruptly by the snap mechanism, the liquid can be efficiently pumped. However, since two valves, an air supply valve and an exhaust valve, are required, there is a problem that the number of parts increases.
JP-A-10-30792

解決しようとする課題は、部品点数を減少して簡単な構造で給気弁と排気弁の開閉を急激に切り換えることが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 capable of reducing the number of parts and switching the opening and closing of the air supply valve and the exhaust valve rapidly with a simple structure.

本発明は、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ートと、給気弁と排気弁からなる切替え弁と、コイルバネを有するスナップ機構が内蔵され、フロートにコイルバネの一端が連結された液体圧送装置において、コイルバネの他端に給気弁と排気弁を兼ねる切替え弁を連結したことを特徴とする。 The present invention provides a float in a sealed container having a working fluid introduction port, a working fluid discharge port, a pressurized liquid inlet and a pressurized liquid discharge port, a switching valve including an air supply valve and an exhaust valve, and a snap mechanism having a coil spring. In the liquid pumping apparatus which is built in and one end of the coil spring is connected to the float, a switching valve which serves as an air supply valve and an exhaust valve is connected to the other end of the coil spring.

本発明は、コイルバネの他端に給気弁と排気弁を兼ねる切替え弁を連結したものであるので、給気弁と排気弁のいずれか一方を不要にでき、部品点数を減少して簡単な構造で給気弁と排気弁の開閉を急激に切り換えることができるという優れた効果を生じる。 In the present invention, since the switching valve that serves as both the air supply valve and the exhaust valve is connected to the other end of the coil spring, either the air supply valve or the exhaust valve can be eliminated, and the number of parts can be reduced and simplified. The structure has an excellent effect that the supply valve and the exhaust valve can be opened and closed rapidly.

本発明の液体圧送装置は、従来公知のそれと同様に、フロートの移動に応じてコイルバネの一端が移動し、所定の位置でコイルバネの他端がスナップ移動することにより、給気弁と排気弁の開閉を急激に切り換えて密閉容器内に溜った液体を圧送する。そして本発明の液体圧送装置で採用する切替え弁は給気弁と排気弁を兼ねるものであるので、給気弁と排気弁のいずれか一方を不要にできる。そのため、部品点数を減少して簡単な構造で給気弁と排気弁の開閉を急激に切り換えることができる。 In the liquid pumping device of the present invention, the one end of the coil spring moves in accordance with the movement of the float, and the other end of the coil spring snaps at a predetermined position in the same manner as conventionally known. The liquid accumulated in the sealed container is pumped by switching the opening and closing rapidly. And since the switching valve employ | adopted with the liquid pumping apparatus of this invention serves as an air supply valve and an exhaust valve, either one of an air supply valve and an exhaust valve can be made unnecessary. Therefore, the number of parts can be reduced, and the opening and closing of the supply valve and the exhaust valve can be switched rapidly with a simple structure.

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は本発明の具体的実施例の液体圧送装置の断面図であり、密閉容器内に復水が無い場合を示す。図２は本発明の具体的実施例の液体圧送装置の断面図であり、スナップ移動が起こった後の状態を示す。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とスナップ機構５が配置されたものである。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には作動流体導入口１１と作動流体排出口１３が設けられ、本体部７には圧送液体流入口１６と圧送液体排出口１７が設けられている。 An embodiment showing a specific example of the above technical means will be described. FIG. 1 is a cross-sectional view of a liquid pumping apparatus according to a specific embodiment of the present invention, and shows a case where there is no condensate in a sealed container. FIG. 2 is a cross-sectional view of a liquid pumping apparatus according to a specific embodiment of the present invention, showing a state after a snap movement has occurred. The liquid pumping apparatus 1 of 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 fluid inlet 11 and a working fluid outlet 13, and the main body 7 is provided with a pressure liquid inlet 16 and a pressure liquid outlet 17.

作動流体導入口１１の内側に給気弁口２０が設けられ、作動流体排出口１３の内側に排気弁口２１が設けられている。給気弁口２０と排気弁口２１は給気弁と排気弁を兼ねる切替え弁４で開閉される。切替え弁４は給気弁口２０を開くと排気弁口２１を閉じ、給気弁口２０を閉じると排気弁口２１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。 An air supply valve port 20 is provided inside the working fluid introduction port 11, and an exhaust valve port 21 is provided inside the working fluid discharge port 13. The air supply valve port 20 and the exhaust valve port 21 are opened and closed by a switching valve 4 that serves both as an air supply valve and an exhaust valve. The switching valve 4 closes the exhaust valve opening 21 when the supply valve opening 20 is opened, and opens the exhaust valve opening 21 when the supply valve opening 20 is closed. The switching valve 4 is connected to the snap mechanism 5.

密閉容器２内に液位と共に浮上降下するフロート３が収容されている。密閉容器２の下部側壁に、密閉容器２内と圧送液体排出口１７との間を連通する排液弁口３２を開けた排液弁座３１がねじ結合されている。フロート３は、浮上降下によって排液弁座３１に直接離着座し、排液弁口３２を直接開閉する。排液弁口３２が開かれると密閉容器２内と圧送液体排出口１７が連通され、排液弁口３２が閉じられると密閉容器２内と圧送液体排出口１７が遮断される。フロート３には連結筒３３が溶接等により固着され、スナップ機構５に連結されている。 A float 3 that rises and falls with the liquid level is accommodated in the sealed container 2. A drain valve seat 31 having a drain valve port 32 that communicates between the inside of the sealed container 2 and the pressurized liquid discharge port 17 is screwed to the lower side wall of the sealed container 2. The float 3 is directly separated from the drainage valve seat 31 by rising and falling, and directly opens and closes the drainage valve port 32. When the drainage valve port 32 is opened, the inside of the sealed container 2 and the pressurized liquid discharge port 17 are communicated with each other, and when the drainage valve port 32 is closed, the inside of the sealed container 2 and the pressurized liquid discharge port 17 are shut off. A connecting cylinder 33 is fixed to the float 3 by welding or the like and is connected to the snap mechanism 5.

スナップ機構５は昇降棒５１と圧縮状態のコイルバネ５２とばね受け５４からなるものである。昇降棒５１は下部に連結筒受け５６，５７が固着され、上部にばね受け連結部材５８が固着され、上端にストッパ５９が固着されている。ばね受け５４は半球状で、ばね受け連結部材５８に回転可能に保持されている。そして、ばね受け５４と切替え弁４の間に圧縮状態のコイルバネ５２が取り付けられている。蓋部８に４本のローラ軸６０が掛け渡され、夫々のローラ軸６０の外周にガイドローラ６１が空転可能に取り付けられている。ガイドローラ６１は昇降棒５１の側方の両側に上下に位置する。 The snap mechanism 5 includes an elevating bar 51, a coil spring 52 in a compressed state, and a spring receiver 54. The elevating rod 51 has connecting tube receivers 56 and 57 fixed to the lower part, a spring receiver connecting member 58 fixed to the upper part, and a stopper 59 fixed to the upper end. The spring receiver 54 is hemispherical and is rotatably held by a spring receiver connecting member 58. A coil spring 52 in a compressed state is attached between the spring receiver 54 and the switching valve 4. Four roller shafts 60 are stretched over the lid portion 8, and guide rollers 61 are attached to the outer circumferences of the respective roller shafts 60 so as to be idled. The guide rollers 61 are vertically positioned on both sides of the lifting bar 51.

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。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、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 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 inlet 11 is connected to a high-pressure steam source, and the working fluid outlet 13 is connected to the steam circulation piping. The pressurized 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, and the pressurized liquid discharge port 17 extends from the liquid reservoir space 10 to the outside. It is connected to a liquid pumping destination such as a boiler via a check valve (not shown) that opens toward the front.

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に示す様にフロート３は底部に位置する。このとき、フロート３が排液弁座３１に着座し、排液弁口３２を閉じている。また切替え弁４は給気弁口２０を閉じ、排気弁口２１を開いている。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内に復水が溜ると、フロート３が排液弁座３１から離座して浮上し、排液弁口３２を開く。このとき、一次側圧力が二次側圧力より高い場合には、圧送液体排出口１７の図示しない逆止弁が開弁しているので、液体溜空間１０に溜った復水は圧送液体排出口１７から外部のボイラーや廃熱利用装置へ排出される。復水を排出した結果、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、排液弁座３１に着座して排液弁口３２を閉じる。 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 float 3 is seated on the drain valve seat 31 and the drain valve port 32 is closed. The switching valve 4 closes the supply valve port 20 and opens the exhaust valve port 21. 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 condensate accumulates in the liquid reservoir space 10, the float 3 moves away from the drain valve seat 31 and floats, and the drain valve port 32 is opened. At this time, when the primary side pressure is higher than the secondary side pressure, the check valve (not shown) of the pressure liquid discharge port 17 is opened, so that the condensate accumulated in the liquid reservoir space 10 is pumped to the pressure liquid discharge port. 17 is discharged to an external boiler or waste heat utilization device. As a result of discharging the condensate, when the water level in the condensate reservoir space 10 is lowered, the float 3 is lowered, seated on the drain valve seat 31 and the drain valve port 32 is closed.

一方、一次側圧力が二次側圧力より低い場合には、圧送液体排出口１７の図示しない逆止弁が閉弁している。そして、フロート３が更に浮上していくと、連結筒３３の上端上面が連結筒受け５６の下面に当接して昇降棒５１を上動させ、ばね受け５４が次第に上に上がる。そのため、コイルバネ５２は更に圧縮され、圧縮エネルギ―が蓄積される。更にフロート３が浮上するとばね受け５４と切替え弁４が水平方向に並ぶ。そして、更に僅かだけフロート３が浮上すると、ばね受け５４が切替え弁４よりも上側になり、コイルバネ５２の押圧力によって、切替え弁４が下方向に向かってスナップ移動し、図２に示す様に給気弁口２０が開かれると共に排気弁口２１が閉じられる。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、圧送液体排出口１７の図示しない逆止弁が開弁する。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から外部のボイラーや廃熱利用装置へ排出される。復水を排出した結果、復水溜空間１０内の水位が低下し、フロート３が降下すると、連結筒３３の上端下面が連結筒受け５７の上面に当接して昇降棒５１を下動させ、ばね受け５４が次第に下に下がる。そして、先とは全く逆の経路をたどり、図１に示す様に給気弁口２０が閉じられると共に排気弁口２１が開けられる。 On the other hand, when the primary side pressure is lower than the secondary side pressure, a check valve (not shown) of the pressure liquid discharge port 17 is closed. When the float 3 further floats, the upper surface of the upper end of the connecting tube 33 comes into contact with the lower surface of the connecting tube receiver 56 to move the lifting bar 51 upward, and the spring receiver 54 gradually rises. Therefore, the coil spring 52 is further compressed, and the compression energy is accumulated. When the float 3 further floats, the spring receiver 54 and the switching valve 4 are arranged in the horizontal direction. Then, when the float 3 further floats slightly, the spring receiver 54 comes above the switching valve 4, and the switching valve 4 snaps downward by the pressing force of the coil spring 52, as shown in FIG. The supply valve port 20 is opened and the exhaust valve port 21 is closed. When the working fluid introduction port 11 is opened, high-pressure steam is introduced into the sealed container 2, the internal pressure rises, and a check valve (not shown) of the pressure liquid discharge port 17 is opened. Condensate collected in the liquid storage space 10 is pushed by the vapor pressure and discharged from the pumped liquid discharge port 17 to an external boiler or waste heat utilization device. As a result of discharging the condensate, when the water level in the condensate reservoir space 10 is lowered and the float 3 is lowered, the lower surface of the upper end of the connecting tube 33 comes into contact with the upper surface of the connecting tube receiver 57 to move the lifting bar 51 downward, and The receptacle 54 is gradually lowered. Then, following the completely opposite path, the air supply valve port 20 is closed and the exhaust valve port 21 is opened as shown in FIG.

本発明の具体的実施例の液体圧送装置の断面図であり、密閉容器内に復水が無い場合を示す。It is sectional drawing of the liquid pumping apparatus of the specific Example of this invention, and shows the case where there is no condensate in an airtight container. 本発明の具体的実施例の液体圧送装置の断面図であり、スナップ移動が起こった後の状態を示す。It is sectional drawing of the liquid pumping apparatus of the specific Example of this invention, and shows the state after snap movement occurred.

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
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
２１排気弁口
２２切替え弁
３１排液弁座
３２排液弁口
５１昇降棒
５２コイルバネ
５４ばね受け
DESCRIPTION OF SYMBOLS 1 Liquid pressure feeder 2 Airtight 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 outlet 21 Exhaust valve opening 22 Switching valve 31 Drain Valve seat 32 Drain valve 51 Lifting rod 52 Coil spring 54 Spring holder

Claims

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ートと、給気弁と排気弁からなる切替え弁と、コイルバネを有するスナップ機構が内蔵され、フロートにコイルバネの一端が連結された液体圧送装置において、コイルバネの他端に給気弁と排気弁を兼ねる切替え弁を連結したことを特徴とする液体圧送装置。
Float in a sealed container having a working fluid introduction port, a working fluid discharge port, a pressure liquid inlet and a pressure liquid discharge port, a switching valve composed of an air supply valve and an exhaust valve, and a snap mechanism having a coil spring are incorporated, A liquid pumping apparatus in which one end of a coil spring is connected to the other end of the coil spring, and a switching valve serving as an air supply valve and an exhaust valve is connected to the other end of the coil spring.