JP5788073B1 - Air valve device - Google Patents

Air valve device Download PDF

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JP5788073B1
JP5788073B1 JP2014224057A JP2014224057A JP5788073B1 JP 5788073 B1 JP5788073 B1 JP 5788073B1 JP 2014224057 A JP2014224057 A JP 2014224057A JP 2014224057 A JP2014224057 A JP 2014224057A JP 5788073 B1 JP5788073 B1 JP 5788073B1
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float
float body
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air
guide
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長谷川 寛
寛 長谷川
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Meiwa Kogyo Co Ltd
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Abstract

【課題】固形物が混在するか可能性がある農業用水の管路等に使用する空気弁装置において、固形物が弁の作動の障害とならない簡単な構造の弁装置を提供する。【解決手段】主弁口312を開閉する上方フロート体32と、上方フロート体32に設けた小弁口を開閉する下方フロート体4を備えたダブルフロートタイプの空気弁であって、主弁口を形成したフロート室の上蓋(円盤突出部311)から垂設した吊下縦杆313に、上方体を上下動自在に装着すると共に、中央にガイド筒部331を設けたガイド体を前記吊下縦杆に装着し、大径下部41と前記ガイド筒部に挿通する柱状上部42とを備えた下方フロート体4を、フロート室の底面板(円盤凸部)における管路と接続する流出入口の上方位置に、載置状態で組み込んでなる。【選択図】図1An object of the present invention is to provide a valve device having a simple structure in which a solid matter does not become an obstacle to the operation of a valve in an air valve device used for agricultural water pipes or the like in which solid matter may be mixed. A double float type air valve comprising an upper float body (32) for opening and closing a main valve port (312) and a lower float body (4) for opening and closing a small valve port provided in the upper float body (32). The upper body is mounted on a suspended vertical shaft 313 suspended from the upper lid (disc protruding portion 311) of the float chamber formed with the upper body so as to be movable up and down, and the guide body provided with a guide cylinder portion 331 in the center is suspended. A lower float body 4 mounted on a vertical shaft and provided with a large-diameter lower portion 41 and a columnar upper portion 42 inserted through the guide tube portion is connected to a conduit on a bottom plate (disk convex portion) of the float chamber. It is assembled in the upper position in a mounted state. [Selection] Figure 1

Description

本発明は、上下水道、農工業用水等の管路内の空気を吸排気する空気弁装置に関するものである。   The present invention relates to an air valve device that sucks and exhausts air in pipes such as water and sewage and agricultural and industrial water.

液流体(水及び汚水等で以下「水」という)の流通路である管路内に存在する空気は、水の流れを阻害する大きな要因となるので、空気弁を介して管路内の空気の吸排気を行い、且つ水の管路外への流出を阻止すると共に、管路内充水後の水中混入空気の排出を行うものである。これらの空気弁装置は、管路に接続したフロート室内にフロート体を収納し、フロート室内の水位によってフロート体を上下動させて、弁の開閉を行うものである。   The air present in the pipeline that is the flow path for liquid fluid (water and sewage, etc., hereinafter referred to as “water”) is a major factor that hinders the flow of water, and therefore the air in the pipeline via the air valve. In addition to preventing the outflow of water to the outside of the pipe, the air mixed in the pipe is discharged after filling the pipe. In these air valve devices, a float body is housed in a float chamber connected to a pipeline, and the float body is moved up and down by the water level in the float chamber to open and close the valve.

また通水時(フロート体の浮力で弁口が閉塞している状態)から空気排出を行う場合、水位が下がってもフロート室内の内圧によってフロート体が弁口を塞いだ吸い付き状態が発生するのを防止する手段として、ダブルフロートタイプ(特許文献1,特許文献2の図10)を採用するか、或いはフロート体をフロート室内に吊下げ中空保持して応動性を高めている(特許文献2,3)。   In addition, when air is discharged from water flow (when the valve opening is blocked by the float body), the float body closes the valve opening due to the internal pressure of the float chamber even if the water level drops. As a means for preventing this, a double float type (Patent Document 1, FIG. 10 of Patent Document 2) is adopted, or the float body is suspended and held hollow in the float chamber to enhance the responsiveness (Patent Document 2). , 3).

特開2003−97751号公報。Japanese Patent Application Laid-Open No. 2003-97751. 特許第3876349号公報。Japanese Patent No. 3876349. 特開2001−165341号公報。JP 2001-165341 A.

シングルフロートタイプの空気弁装置は、フロート体をフロート室内で吊り下げ保持しているので、吊下げ保持機構が必要となり、構造が複雑になってしまうと共に、フロート体が安定して上下動するために、フロート室の内壁にガイド部を備えているが、筒状体であるフロート室内壁にガイド部を形成しなければならない製造上の煩雑さがある。而も急速排気に際してフロート室に流入する水に混在する固形物・ゴミが、水没するフロート体とガイド部との間隙まで達し、当該間隙に固形物が挟まると、フロート体の動作に支障をきたす。   In the single float type air valve device, the float body is suspended and held in the float chamber, so a suspension holding mechanism is required, the structure becomes complicated, and the float body moves up and down stably. In addition, although the guide portion is provided on the inner wall of the float chamber, there is a manufacturing complexity that the guide portion must be formed on the float chamber wall that is a cylindrical body. However, the solid matter / dust mixed in the water flowing into the float chamber during rapid exhaust reaches the gap between the submerged float body and the guide part, and if the solid matter is caught in the gap, the operation of the float body is hindered. .

また従前のダブルフロートタイプにおいては、フロート室内にフロート体を中空保持するのに、椀状網体又は椀状枠体の保持部を採用しており、前記のシングルフロートタイプと同様に、急速排気時に水没する下方フロート体と前記保持部の間に固形物が挟まりやすくなってしまうので、固形物が含まれる農業用水管路や下水管路の空気抜き装置としては適当ではない。   In addition, the conventional double float type employs a cage-like net body or a cage-like frame holding part to hold the float body hollow in the float chamber, and as with the single float type, rapid exhaust Since solids are likely to be caught between the lower float body that is sometimes submerged and the holding unit, it is not suitable as an air vent for agricultural water pipes or sewage pipes containing solids.

そこで、構造が簡易であるダブルフロートタイプにおいて、固形物の目詰まりの原因となる下方フロート体の中空保持構造を採用しない新規な空気抜き装置を提案したものである。また下方フロート体の非中空保持構造(載置構造)を採用した際に生ずる下方フロート体の応動機能性低下を解決した装置を提案したものである。   Therefore, in the double float type having a simple structure, a novel air venting apparatus that does not employ the hollow holding structure of the lower float body that causes clogging of solid matter is proposed. The present invention also proposes a device that solves the lowering of the response functionality of the lower float that occurs when the non-hollow holding structure (mounting structure) of the lower float is adopted.

本発明の請求項1に係る空気弁装置は、管路と接続するフロート室に、フロート室上面に開口した主弁口を開閉する上方フロート体と、浮力で上方フロート体を押し上げると共に、上方フロート体に設けた小弁口の開閉を行う下方フロート体を内装し、下方フロート体が水面に浮いた状態で主弁口が閉塞される空気弁装置であって、主弁口を形成したフロート室の上蓋から垂設した吊下縦杆に、上方フロート体を上下動自在に装着すると共に、中央にガイド筒部を設けたガイド体を前記吊下縦杆に装着し、大径下部と前記ガイド筒部に挿通する柱状上部とを備えた下方フロート体を、フロート室底面板における管路と接続する流出入口の上方位置に、載置状態で組み込んでなることを特徴とするものである。 According to a first aspect of the present invention, an air valve device includes a float chamber connected to a pipe line, an upper float body that opens and closes a main valve opening that is open on the upper surface of the float chamber, and the upper float body is pushed up by buoyancy. An air valve device in which a lower float body that opens and closes a small valve opening provided in the body is installed, and the main valve opening is closed in a state where the lower float body floats on the water surface, and the float chamber in which the main valve opening is formed An upper float body is mounted on a hanging vertical shaft suspended from the upper lid of the suspension, and a guide body provided with a guide cylinder portion at the center is mounted on the hanging vertical shaft, and the lower part of the large diameter and the guide are mounted. The lower float body provided with the columnar upper part inserted in the cylinder part is assembled in a mounted state at a position above the outflow inlet connected to the conduit on the bottom plate of the float chamber.

而して前記装置を所定の管路の分岐路に接続すると、管路注水時の急速排気は、流出入口からフロート室内に管路内空気が侵入し、下方フロート体の外周空間を通過して開口した主弁口から排出され、水がフロート室に侵入すると下方フロート体がその浮力で浮かび上がり、柱状上部の上端が上方フロート体を押し上げ、フロート室に上部空間を残したまま、上方フロート体が主弁口を閉塞する。管路通水時の混入空気排気は、フロート室の内圧が低下せずに、上方フロート体が主弁口を塞いだ状態であっても、下方フロート体の上下動(水位の変動)で、小弁口を開閉して行われる。急速吸気に際しては、水位の低下と共にフロート室の内圧も低下し、上方フロート体が下降し、開口した主弁口から吸引される。   Thus, when the above apparatus is connected to a branch line of a predetermined pipe line, the quick exhaust during pipe water injection causes air in the pipe line to enter the float chamber from the outflow inlet and pass through the outer peripheral space of the lower float body. When the water is discharged from the opened main valve port and water enters the float chamber, the lower float body floats by its buoyancy, and the upper end of the columnar upper part pushes up the upper float body, leaving the upper space in the float chamber, and the upper float body Closes the main valve port. The mixed air exhaust during the passage of water through the pipe line is caused by the vertical movement of the lower float body (fluctuation of the water level) even when the upper float body blocks the main valve port without reducing the internal pressure of the float chamber. This is done by opening and closing the small valve opening. During rapid intake, the internal pressure of the float chamber decreases as the water level decreases, and the upper float body descends and is sucked from the opened main valve port.

特に本発明は、フロート室の上方にガイド筒部を備えたガイド体を設け、下方フロート体の柱状上部をガイド筒部に挿通したものであるから、下方フロート体は安定して上下動し、且つ前記下方フロート体の大径下部を相応の容量として、ガイド筒部と柱状上部の嵌合部分まで水位を上昇させず、水に含まれる固形分によって下方フロート体の上下動に支障をきたさない。   In particular, the present invention is provided with a guide body provided with a guide cylinder portion above the float chamber, and the columnar upper part of the lower float body is inserted into the guide cylinder portion, so that the lower float body stably moves up and down, Moreover, the lower float body has a large diameter lower part with a corresponding capacity, the water level is not raised to the fitting part between the guide cylinder part and the columnar upper part, and the vertical movement of the lower float body is not hindered by the solid content contained in the water. .

また本発明の請求項2記載の発明は、更に前記空気弁装置において、フロート室の底面板に、流出入口と対面する開口部を設けた脚支持の載置台を設け、前記載置台に下方フロート体を載置してなるもので、急速排気に際してのフロート室への空気及び水の流入が、載置台の周囲の開口箇所からの吹き出しと、載置台開口部からの下方フロート体の底面へ向けての吹き出しにより、フロート室内に速やかになされると共に、管路充水が進み、水がフロート室へ侵入すると、水が載置台開口部から下方フロート体の底面に衝突して、下方フロート体の上方移動がスムーズに行われる。   Further, in the air valve device according to the second aspect of the present invention, in the air valve device, the bottom plate of the float chamber is provided with a leg-supporting mounting table provided with an opening facing the outflow inlet, and the above-mentioned mounting table has a lower float. The air and water flow into the float chamber during rapid exhaust is directed to the blowout from the opening around the mounting table and to the bottom surface of the lower float body from the mounting table opening. As soon as the water is blown into the float chamber, the filling of the pipeline progresses and water enters the float chamber, the water collides with the bottom surface of the lower float body from the opening of the mounting table, and the lower float body The upward movement is performed smoothly.

また本発明の請求項3記載の発明は、前記各空気弁装置において、下方フロート体の大径下部を短円柱状に形成すると共に、底面に適宜間隔で脚部を設け、脚部位置より外周縁部をR状面に形成してなるもので、急速排気に際して流出入口又は載置台開口部から下方フロート体の底面に空気の流入による吹き上げがなされても、空気は下方フロート体の底面にある脚部間の間隙からR状面に添ってフロート室内を上昇するため、空気の流入時における下方フロート体の上方への跳ね上げを抑制すると共に、下方フロート体とフロート室の底面板又は載置台が接地面積の少ない脚部を以て接地することで、下方フロート体がフロート室の底面板又は載置台に吸着することを防ぎ、水の流入時における下方フロート体の応動機能性を高める。   According to a third aspect of the present invention, in each of the above air valve devices, the lower diameter large lower portion of the lower float body is formed in a short columnar shape, and leg portions are provided at appropriate intervals on the bottom surface. The peripheral edge is formed in an R-shaped surface, and even if air is blown up from the outflow inlet or the mounting table opening to the bottom surface of the lower float body at the time of rapid exhaust, the air is on the bottom surface of the lower float body In order to ascend the float chamber along the R-shaped surface from the gap between the leg portions, it is possible to suppress upward jumping of the lower float body at the time of inflow of air, and the bottom plate or mounting table of the lower float body and the float chamber By grounding with a leg portion having a small ground contact area, the lower float body is prevented from adsorbing to the bottom plate or mounting table of the float chamber, and the responsive function of the lower float body at the time of inflow of water is enhanced.

また本発明の請求項4記載の発明は、前記各空気弁装置において、ガイド体を、ガイド筒部とガイド筒部の上下中間部から周設した鍔状板部で構成し、鍔状板部を吊下縦杆の下端面に固着してなるもので、急速排気に際して流出入口又は載置台開口部からフロート室内に空気が侵入すると、空気は下方フロート体及び鍔状板部の外周空間を通過して主弁口から排出されるので、空気中に飛散固形物が存在しても、ガイド筒部と柱状上部の嵌合箇所への入り込みが阻止される。   According to a fourth aspect of the present invention, in each of the air valve devices, the guide body is constituted by a guide cylinder part and a bowl-like plate part provided around the upper and lower intermediate parts of the guide cylinder part, and the bowl-like plate part Is fixed to the lower end surface of the suspended vertical rod, and when air enters the float chamber from the outflow inlet or the mounting table opening during rapid exhaust, the air passes through the outer space of the lower float body and the bowl-shaped plate portion. Thus, even if there are scattered solids in the air, entry into the fitting portion between the guide tube portion and the columnar upper portion is prevented.

本発明の構成は上記のとおりで、構造が簡易なダブルフロートタイプの空気弁装置で、下方フロート体を、大径下部と柱状上部とを備えた形状として、水没しない柱状上部で下方フロート体の上下動をガイドするようにしたので、急速排気時に水に含まれる固形物(ゴミや汚物)が下方フロート体のガイド箇所に侵入して下方フロート体の上下動を阻害することなく、管路通水時の混入空気排気もスムーズに行われると共に、管路内への注排水に伴う急速吸排気にも十分に対応できたものである。   The structure of the present invention is as described above. In the double float type air valve device with a simple structure, the lower float body has a shape having a large diameter lower portion and a columnar upper portion, and the lower float body is not submerged in the columnar upper portion. Since the vertical movement is guided, the solid matter (dust and dirt) contained in the water during rapid exhaust enters the guide area of the lower float body and does not hinder the vertical movement of the lower float body. The mixed air exhaust during water is performed smoothly, and it can sufficiently cope with the quick intake and exhaust accompanying the pouring and draining into the pipe.

本発明の実施形態の全体の断面図。1 is an overall cross-sectional view of an embodiment of the present invention. 同分解斜視図(フロート室上部の構成部品)。The exploded perspective view (component of the upper part of a float chamber). 同底板部材の斜視図。The perspective view of the bottom plate member. 同上方部材の斜視図。The perspective view of the upper member. 同下方フロート体の下方斜視図。The lower perspective view of the lower float body. 同動作説明図(急速吸排気時)。The same operation explanatory drawing (at the time of rapid intake and exhaust). 同図(管路通水時)。The same figure (when water is passed through the pipeline).

次に本発明の実施形態について説明する。実施形態に示した空気弁装置は、フロート室Aの周側面を構成する側面体1の下方に連結する底板部材2と、上方に連結する上方部材3と、内置される下方フロート体4と、最上方に装着されるカバー体5とからなる。   Next, an embodiment of the present invention will be described. The air valve device shown in the embodiment includes a bottom plate member 2 connected to the lower side of the side body 1 constituting the peripheral side surface of the float chamber A, an upper member 3 connected to the upper side, a lower float body 4 placed inside, The cover body 5 is mounted on the uppermost side.

側面体1は、フロート室Aを形成する適宜径及び適宜高さを備えた円筒本体部11の上下端に連結用の上下フランジ部12,13を設けたものである。前記フランジ部12,13の所定位置には、ボルト孔を穿設してなる。   The side body 1 is provided with upper and lower flange portions 12 and 13 for connection at upper and lower ends of a cylindrical main body portion 11 having an appropriate diameter and an appropriate height for forming the float chamber A. Bolt holes are formed at predetermined positions of the flange portions 12 and 13.

底板部材2は、開閉弁を一体に組み込んだ例を示したもので下方から管路との接続部21、開閉弁部(内部は図示せず:開閉弁部は省略した構造でも良い)22、底面部23を設けたもので、開閉弁部22の外方には弁開閉を行う操作レバー221を付設してなる。   The bottom plate member 2 shows an example in which an on-off valve is integrated, and a connection portion 21 with a pipe line from below, an on-off valve portion (the inside is not shown: the on-off valve portion may be omitted) 22, A bottom portion 23 is provided, and an operation lever 221 for opening and closing the valve is provided outside the opening / closing valve portion 22.

底面部23は、フロート室Aの底面板を構成する円盤凸部231と、円盤凸部231の周囲に装着したパッキン232と、円盤凸部231の外周の外周板部233を備え、外周板部233は、所定位置にボルト孔を穿設し、前記下方フランジ部13と当接してボルト連結するものである。   The bottom surface portion 23 includes a disk convex portion 231 constituting a bottom plate of the float chamber A, a packing 232 mounted around the disk convex portion 231, and an outer peripheral plate portion 233 on the outer periphery of the disk convex portion 231. Reference numeral 233 denotes a bolt hole formed at a predetermined position and abutted against the lower flange portion 13 for bolt connection.

また円盤凸部231には、開閉弁と連通する流出入口234が設けられると共に、円盤凸部231より小径の載置台235を、載置台脚部236を介して前記円盤凸部231上に設ける。前記載置台235の中心には、載置台開口部237を設ける。尚前記載置台開口部237は、後述する下方フロート体4の脚部位置より内方の径となる。   The disk convex portion 231 is provided with an outflow inlet 234 communicating with the on-off valve, and a mounting table 235 having a smaller diameter than the disk convex portion 231 is provided on the disk convex portion 231 via the mounting table leg portion 236. In the center of the mounting table 235, a mounting table opening 237 is provided. The mounting opening 237 described above has an inner diameter from a leg position of the lower float body 4 to be described later.

上方部材3は、上蓋体31と上方フロート体32とガイド体33で構成され、上蓋体31は、底面部23と同様に円筒本体部11にパッキンを介在させて水密嵌合するもので、フロート室Aの上蓋311となる円盤突出部と、所定位置にボルト孔を穿設して、上方フランジ部12と当接してボルト連結する縁板部とを備えると共に、中央に主弁口312を穿設し、裏面に適宜間隔をあけて2本の吊下縦杆313を垂設してなる。   The upper member 3 includes an upper lid body 31, an upper float body 32, and a guide body 33, and the upper lid body 31 is watertightly fitted to the cylindrical main body portion 11 with a packing interposed like the bottom surface portion 23. A disk protruding portion serving as the upper lid 311 of the chamber A, a bolt hole formed at a predetermined position, an edge plate portion contacting the upper flange portion 12 to be connected to the bolt, and a main valve port 312 formed at the center. And two hanging downboards 313 are vertically suspended on the back surface at an appropriate interval.

上方フロート体32は、樹脂製で底面側を下方凹部321とした逆椀形状で、外周面に前記吊下縦杆313が嵌合する装着凹部322を設けて、吊下縦杆313の間に装着して上下動可能としたもので、上面には上蓋311に形成した主弁口312に収納される大きさの円錐台形状の突部323を設けて、前記突部323には、中央上下に貫通する小弁口324を設けてなる。   The upper float body 32 is made of resin and has a reverse saddle shape with a bottom recess 321 on the bottom side. The upper float body 32 is provided with a mounting recess 322 on the outer peripheral surface where the hanging vertical hook 313 is fitted. It is mounted so that it can be moved up and down. A frustoconical protrusion 323 having a size accommodated in a main valve port 312 formed on the upper lid 311 is provided on the upper surface, and the protrusion 323 has a central upper and lower protrusion. A small valve port 324 that penetrates through is provided.

ガイド体33は、樹脂製でガイド筒部331とガイド筒部331の上下中間部から周設した鍔状板部332で構成されるもので、鍔状板部332を吊下縦杆313の端面にビス止めするものである。また特にガイド筒部331の外周は前記上方フロート体32の底面側の下方凹部321より小径としてなる。   The guide body 33 is made of a resin and includes a guide tube portion 331 and a flange-shaped plate portion 332 that is provided around the upper and lower intermediate portions of the guide tube portion 331, and the end surface of the vertical rod 313 that suspends the flange-shaped plate portion 332. It is to screw. In particular, the outer periphery of the guide tube portion 331 has a smaller diameter than the lower recessed portion 321 on the bottom surface side of the upper float body 32.

前記の上方部材3は、フロート室Aを形成する側面体1内の所定位置に、下方フロート体4を内置して、側面体1に被冠装着するものである。   The upper member 3 has a lower float body 4 placed at a predetermined position in the side body 1 that forms the float chamber A, and is mounted on the side body 1 with a crown.

下方フロート体4は、適宜な重量と浮力を備えた樹脂製で、下方が短円柱状の大径下部41で、前記大径下部41の上方に柱状上部42を設けたものである。また前記大径下部41の底面には、適宜間隔で脚部43を設け、脚部位置より外周縁部をR状面44に形成したものである。   The lower float body 4 is made of a resin having an appropriate weight and buoyancy, the lower portion is a large-diameter lower portion 41 having a short cylindrical shape, and a columnar upper portion 42 is provided above the large-diameter lower portion 41. Further, leg portions 43 are provided at appropriate intervals on the bottom surface of the large-diameter lower portion 41, and an outer peripheral edge portion is formed on the R-shaped surface 44 from the position of the leg portion.

前記下方フロート体4は、載置台235の上に載置され、当該載置状態で柱状上部42がガイド筒部331に挿通した状態で組み込まれる。   The lower float body 4 is mounted on the mounting table 235 and is incorporated in a state where the columnar upper portion 42 is inserted through the guide tube portion 331 in the mounting state.

カバー体5は、上方部材3の上面に被冠して主弁口312の露出を防止するもので、上方部材3の上方に適宜な間隙を有せしめて装着するものである。   The cover body 5 is put on the upper surface of the upper member 3 to prevent the main valve port 312 from being exposed, and is mounted with an appropriate gap above the upper member 3.

而して前記実施形態に示した開閉弁付の空気弁装置は、農工業用水等の管路の分岐路に接続するもので、管路内への注水時の急速排気、排水時の急速吸気、通水時の混入空気排気を行うものである。   Thus, the air valve device with an on-off valve shown in the above embodiment is connected to a branch of a pipeline for agricultural and industrial water or the like. The mixed air is exhausted when water flows.

管路注水時の急速排気は、フロート室Aに空気が充たされており、上方フロート体32及び下方フロート体4が、その自重により下方に位置している状態で、流出入口234から空気がフロート室Aに入り込み、開口した主弁口312から外気に放出される。この流出入口234からフロート室Aへの空気の流入は、円盤凸部231と載置台235の間隙aからの吹き出しと、載置台開口部237を通過して載置台235と下方フロート体4の底面との間隙bからの吹き出しによってフロート室A内に侵入する。その際、間隙bからの流入空気は、R状面44に添って上昇して、下方フロート体4を上方へ跳ね上げて上方フロート体32を押し上げ、主弁口312を塞ぐことがなく、また空気流によって下方フロート体4が載置台235に押し付けられることもなくスムーズに主弁口312から排出される(図6)。   The quick exhaust during the water injection of the pipe line is that the float chamber A is filled with air, and the air flows from the inlet / outlet 234 while the upper float body 32 and the lower float body 4 are positioned below due to their own weight. The air enters the float chamber A and is released to the outside air from the opened main valve port 312. The inflow of air from the outlet / inlet 234 into the float chamber A is blown from the gap a between the disk convex portion 231 and the mounting table 235, passes through the mounting table opening 237, and the bottom surface of the mounting table 235 and the lower float body 4. The air enters the float chamber A by blowing out from the gap b. At that time, the inflow air from the gap b rises along the R-shaped surface 44, jumps up the lower float body 4 and pushes up the upper float body 32, and does not block the main valve port 312. The lower float body 4 is smoothly pushed out of the main valve port 312 without being pressed against the mounting table 235 by the air flow (FIG. 6).

次に管路充水が進み、水が流出入口234からフロート室A内に侵入すると、空気の流入と同様に間隙a,bからフロート室Aに入り込む。この流入水によって下方フロート体4が浮き上がり、柱状上部42の上端で上方フロート体32を押し上げ、フロート室A内に上部空間cを残したまま、上方フロート体32が主弁口312を閉塞する(図7)。   Next, when the filling of the pipeline proceeds and water enters the float chamber A from the outflow inlet 234, it enters the float chamber A through the gaps a and b in the same manner as the inflow of air. The lower float body 4 is lifted by this inflowing water, pushes up the upper float body 32 at the upper end of the columnar upper portion 42, and the upper float body 32 closes the main valve port 312 while leaving the upper space c in the float chamber A ( FIG. 7).

この際の水位dは、ガイド筒部331の下端より下方に位置するように、予め下方フロート体4の浮力を設定しておくもので、ガイド筒部331が水位dよりも上方にあるので、用水中に固形物(ゴミ等)が存在したとしても、フロート室A内に留まることになり、下方フロート体4の上下動を阻害することも、主弁口312や小弁口324にゴミが挟まって空気弁機能を損なうこともない。   At this time, the water level d is set in advance so that the buoyancy of the lower float body 4 is positioned below the lower end of the guide cylinder part 331, and the guide cylinder part 331 is above the water level d. Even if solids (dust etc.) exist in the irrigation water, they will remain in the float chamber A, and the vertical movement of the lower float body 4 may be obstructed. It does not impair the air valve function.

また管路内排水時の急速吸気においては、フロート室A内の溜水が流出入口234から管路へ排水されると共に、フロート室A内が減圧状態となるので、上方フロート体32と下方フロート体4が共に下降して主弁口312を開口し、且つ下方フロート体4で流出入口234を閉じることなく、急速吸気が実現する。   Further, in quick intake during drainage in the pipeline, the accumulated water in the float chamber A is drained from the outlet / inlet 234 to the pipeline and the inside of the float chamber A is in a decompressed state, so the upper float body 32 and the lower float The body 4 descends together to open the main valve port 312, and the quick intake is realized without closing the outflow inlet 234 with the lower float body 4.

次に管路通水時における混入空気排気は、図7に例示する通りフロート室A内の溜水で下方フロート体4が浮上した状態で、上方フロート体32で主弁口312が閉塞されている。この状態で水中混入空気がフロート室A内に侵入すると、フロート室A内の内圧が低下せず、上方フロート体32が主弁口312を塞いだ吸い付き状態であっても、下方フロート体4が下降して小弁口324を開口して外気に放出される。   Next, as shown in FIG. 7, the mixed air exhaust during the passage of water in the pipe line is such that the main valve port 312 is closed by the upper float body 32 in a state where the lower float body 4 is floated by the accumulated water in the float chamber A. Yes. If underwater air enters the float chamber A in this state, the internal pressure in the float chamber A does not decrease, and even if the upper float body 32 closes the main valve port 312, the lower float body 4 Descends and opens the small valve port 324 to be released to the outside air.

このように管路内への注排水に伴う急速吸排気や管路通水時の混入空気排気もスムーズになされるものである。   In this way, rapid intake / exhaust associated with pouring / draining into the pipeline and mixed air exhaust when passing through the pipeline are smoothly performed.

尚前記の実施形態は、開閉弁を一体に組み込んだ例を示しているが、特に開閉弁機構を備えずに、本発明装置を直接管路の分岐路に接続するようにしても良い。   Although the above embodiment shows an example in which the on-off valve is integrated, the apparatus of the present invention may be directly connected to the branch line of the pipe without providing the on-off valve mechanism.

1 側面体
11 円筒本体部
12 上方フランジ部
13 下方フランジ部
2 底板部材
21 接続部
22 開閉弁部
221 操作レバー
23 底面部
231 円盤凸部(底面板)
232 パッキン
233 外周板部
234 流出入口
235 載置台
236 載置台脚部
237 載置台開口部
3 上方部材
31 上蓋体
311 上蓋(円盤突出部)
312 主弁口
313 吊下縦杆
32 上方フロート体
321 下方凹部
322 装着凹部
323 突部
324 小弁口
33 ガイド体
331 ガイド筒部
332 鍔状板部
4 下方フロート体
41 大径下部
42 柱状上部
43 脚部
44 R状面
5 カバー体
DESCRIPTION OF SYMBOLS 1 Side body 11 Cylindrical main-body part 12 Upper flange part 13 Lower flange part 2 Bottom plate member 21 Connection part 22 On-off valve part 221 Operation lever 23 Bottom face part 231 Disc convex part (bottom board)
232 Packing 233 Outer peripheral plate portion 234 Outlet / inlet 235 Mounting table 236 Mounting table leg 237 Mounting table opening 3 Upper member 31 Upper lid body 311 Upper lid (disc protruding portion)
312 Main valve port 313 Suspended vertical rod 32 Upper float body 321 Lower concave portion 322 Mounting concave portion 323 Projection portion 324 Small valve port 33 Guide body 331 Guide cylinder portion 332 Vertical plate portion 4 Lower float body 41 Large diameter lower portion 42 Columnar upper portion 43 Leg 44 R-shaped surface 5 Cover body

Claims (4)

管路と接続するフロート室に、フロート室上面に開口した主弁口を開閉する上方フロート体と、浮力で上方フロート体を押し上げると共に、上方フロート体に設けた小弁口の開閉を行う下方フロート体を内装し、下方フロート体が水面に浮いた状態で主弁口が閉塞される空気弁装置であって、主弁口を形成したフロート室の上蓋から垂設した吊下縦杆に、上方フロート体を上下動自在に装着すると共に、中央にガイド筒部を設けたガイド体を前記吊下縦杆に装着し、大径下部と前記ガイド筒部に挿通する柱状上部とを備えた下方フロート体を、フロート室底面板における管路と接続する流出入口の上方位置に、載置状態で組み込んでなることを特徴とする空気弁装置。 An upper float body that opens and closes the main valve opening that opens to the upper surface of the float chamber, and a lower float that pushes up the upper float body by buoyancy and opens and closes the small valve opening provided on the upper float body. An air valve device in which the main valve port is closed while the lower float body is floated on the water surface, and is suspended upward from a suspended vertical shaft suspended from the upper lid of the float chamber in which the main valve port is formed. A float body is mounted so as to be movable up and down, and a guide body having a guide cylinder portion at the center is mounted on the suspended vertical shaft, and a lower float having a large-diameter lower portion and a columnar upper portion inserted through the guide cylinder portion An air valve device comprising a body mounted in a mounted state at a position above an outflow inlet connected to a pipe line in a bottom plate of a float chamber. フロート室の底面板に、流出入口と対面する開口部を設けた脚支持の載置台を設け、前記載置台に下方フロート体を載置してなる請求項1記載の空気弁装置。   The air valve device according to claim 1, wherein a leg-supporting mounting table provided with an opening facing the outflow inlet is provided on the bottom plate of the float chamber, and the lower float body is mounted on the mounting table. 下方フロート体の大径下部を短円柱状に形成すると共に、底面に適宜間隔で脚部を設け、脚部位置より外周縁部をR状面に形成してなる請求項1又は2記載の空気弁装置。   3. The air according to claim 1 or 2, wherein the lower float body is formed in a short cylindrical shape with a large-diameter lower portion, legs are provided at appropriate intervals on the bottom surface, and an outer peripheral edge is formed on the R-shaped surface from the leg position. Valve device. ガイド体を、ガイド筒部とガイド筒部の上下中間部から周設した鍔状板部で構成し、鍔状板部を吊下縦杆の下端面に固着してなる請求項1乃至3記載の何れかの空気弁装置。
The guide body is composed of a guide tube portion and a hook-like plate portion provided around the upper and lower intermediate portions of the guide tube portion, and the hook-like plate portion is fixed to the lower end surface of the suspended vertical hook. Any of the air valve devices.
JP2014224057A 2014-11-04 2014-11-04 Air valve device Active JP5788073B1 (en)

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