JPH07317954A - Vacuum valve with impurity cutting structure - Google Patents

Vacuum valve with impurity cutting structure

Info

Publication number
JPH07317954A
JPH07317954A JP11794394A JP11794394A JPH07317954A JP H07317954 A JPH07317954 A JP H07317954A JP 11794394 A JP11794394 A JP 11794394A JP 11794394 A JP11794394 A JP 11794394A JP H07317954 A JPH07317954 A JP H07317954A
Authority
JP
Japan
Prior art keywords
valve
vacuum
valve seat
valve body
seat
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.)
Pending
Application number
JP11794394A
Other languages
Japanese (ja)
Inventor
Kaname Aozasa
要 青笹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP11794394A priority Critical patent/JPH07317954A/en
Publication of JPH07317954A publication Critical patent/JPH07317954A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent impurities held between a valve body and a valve seat, by providing cutter means to cut the impurities at the fluid passing part of a housing which has a fluid passing part and a valve seat, in a vacuum valve in a vacuum type sewerage system and the like. CONSTITUTION:A vacuum valve set in a house-inlet, in a vacuum type sewerage system, has a function to open and close a fluid passing part 28 provided between a sewerage suction pipe communicating to a houseinlet, and a vacuum sewerage pipe communicating to a vacuum source, and it has a valve seat 20, a main valve 24, a valve rod 29, a valve operating chamber, and the like. In this case, a seal rubber 91 and a tip seal presser 92 are provided immediately below the main valve 24 fixed to the tip of the valve rod 29, and cutter edges 94 and 95 are provided along the outer periphery of the tip seal presser 92, and the inner periphery of the valve seat 20 respectively. At the closing operation of the vacuum valve 2, the impurities attached to the seal parts of the main valve 24 and the valve seat 20 are cut by both cutter edges 94 and 95, and exhausted, so as to secure the airtightness of the seal parts.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は真空弁に係り、特に真空
式下水道システムに用いられて好適な夾雑物切断機構付
き真空弁に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum valve, and more particularly to a vacuum valve with a foreign matter cutting mechanism suitable for use in a vacuum sewer system.

【0002】[0002]

【従来の技術】真空式下水道は、図6に示す如く、真空
弁付き汚水ます1に家庭等からの汚水を流入せしめ、一
定量になった時点で真空弁2を開き、真空ステーション
3に設置されている真空ポンプ4により減圧されている
真空下水管5に汚水を吸引する。そして、この汚水を集
水タンク6まで搬送し、圧送ポンプ7により自然流下式
の下水道に圧送する。
2. Description of the Related Art As shown in FIG. 6, a vacuum type sewer system allows sewage from households to flow into a sewage tank 1 with a vacuum valve, and when a certain amount is reached, a vacuum valve 2 is opened and installed in a vacuum station 3. The sewage is sucked into the vacuum sewer pipe 5 whose pressure is reduced by the vacuum pump 4 which is operated. Then, this sewage is conveyed to the water collection tank 6 and is pressure-fed by the pressure feed pump 7 to the free-flowing type sewer.

【0003】このとき、真空弁2は、汚水ます1に連通
する汚水吸込み管1Aと、上記真空下水管5との間の連
絡部(流体通過部)を開閉するものであり、流体通過部
と弁座とを備えたハウジングと、ハウジング内に設けら
れて弁座に接離することにより、流体通過部を開閉する
弁体と、弁体を弁座に押圧する押圧手段と、押圧手段に
抗して弁体を弁座から離すための真空圧が作用する弁作
動室とを有して構成されている。
At this time, the vacuum valve 2 opens and closes a connecting portion (fluid passage portion) between the sewage suction pipe 1A communicating with the sewage tank 1 and the vacuum sewer pipe 5. A housing provided with a valve seat, a valve body provided in the housing to open and close the fluid passage portion by opening and closing the valve seat, a pressing means for pressing the valve body against the valve seat, and a resistance against the pressing means. And a valve working chamber to which a vacuum pressure for separating the valve body from the valve seat acts.

【0004】然るに、従来技術では、特開平5-240373号
公報に記載の如く、弁の作動時に弁体とケーシングとの
間の間隙に小石等の異物が噛み込むことによって弁体が
全閉できず、結果として全システムの真空度が低下して
真空式下水道が機能停止になることを防止するため、ケ
ーシング内壁を弁座の近傍から外方に膨らませるように
構成したものがある。
However, in the prior art, as described in Japanese Patent Application Laid-Open No. 5-240373, foreign matter such as pebbles is caught in the gap between the valve body and the casing when the valve is operated, so that the valve body can be fully closed. In some cases, the inner wall of the casing is inflated outward from the vicinity of the valve seat to prevent the vacuum system of the entire system from being lowered and the vacuum sewer system to stop functioning.

【0005】[0005]

【発明が解決しようとする課題】然しながら、従来技術
では、真空弁を通過する流体の中に含まれている例えば
糸状の細長い夾雑物(例えばワラ、紐、ビニルロープ
等)が、真空弁の閉作動時に、弁体と弁座との間にから
みつく等によって挟まった場合、これを排除することが
できない。このように、真空弁の流体通過部に夾雑物が
侵入して、これが弁体と弁座との間に挟まり続ける場合
には、弁体が全閉できず、真空弁の気密が妨げられる結
果、全システムの真空度が低下して真空式下水道が機能
停止となる。
However, in the prior art, for example, thread-like elongated impurities (eg straw, string, vinyl rope, etc.) contained in the fluid passing through the vacuum valve are closed. When the valve body and the valve seat are caught by entanglement or the like during operation, this cannot be eliminated. As described above, if foreign matter enters the fluid passage portion of the vacuum valve and continues to be sandwiched between the valve body and the valve seat, the valve body cannot be fully closed, and the airtightness of the vacuum valve is hindered. , The vacuum level of the entire system is reduced and the vacuum sewer system stops functioning.

【0006】本発明は、真空弁を通過する流体中に夾雑
物が混入していても、これらの夾雑物が弁体と弁座との
間に挟まることを防止することを目的とする。
An object of the present invention is to prevent foreign substances from being trapped between the valve body and the valve seat even if the foreign substances are mixed in the fluid passing through the vacuum valve.

【0007】[0007]

【課題を解決するための手段】請求項1に記載の本発明
は、流体通過部と弁座とを備えたハウジングと、ハウジ
ング内に設けられて弁座に接離することにより、流体通
過部を開閉する弁体と、弁体を弁座に押圧する押圧手段
と、押圧手段に抗して弁体を弁座から離すための真空圧
が作用する弁作動室とを有してなる真空弁において、前
記ハウジングの流体通過部に夾雑物切断用のカッター手
段を設けてなるようにしたものである。
The present invention according to claim 1 provides a housing having a fluid passage portion and a valve seat, and a fluid passage portion provided in the housing and brought into contact with and separated from the valve seat. A vacuum valve having a valve body for opening and closing the valve, a pressing means for pressing the valve body against the valve seat, and a valve working chamber on which a vacuum pressure acts to separate the valve body from the valve seat against the pressing means. In the above, the fluid passage portion of the housing is provided with a cutter means for cutting foreign matters.

【0008】請求項2に記載の本発明は、請求項1に記
載の本発明において更に、前記カッター手段が、弁体の
先端部と弁座の下流部とにカッター刃を設けることにて
構成されてなるようにしたものである。
According to a second aspect of the present invention, in addition to the first aspect of the present invention, the cutter means is provided with a cutter blade at a tip portion of the valve body and a downstream portion of the valve seat. It was designed to be done.

【0009】[0009]

【作用】請求項1に記載の本発明によれば下記の作用
がある。 真空弁を通過する流体の中に混入している夾雑物は、
その流体通過部に設けられているカッター手段により切
断される結果、真空弁の閉作動時にも、弁体と弁座との
間にからみつく等によって挟まることがなく、スムース
に弁下流側に流下するものとなる。これにより、真空弁
は必ず全閉して気密保持できる。
According to the present invention as set forth in claim 1, the following effects are obtained. The impurities mixed in the fluid passing through the vacuum valve are
As a result of being cut by the cutter means provided in the fluid passage part, even when the vacuum valve is closed, it does not get caught between the valve body and the valve seat due to entanglement, etc., and smoothly flows down to the downstream side of the valve. Will be things. This ensures that the vacuum valve is fully closed and can be kept airtight.

【0010】請求項2に記載の本発明によれば下記の
作用がある。 弁体の先端部と弁座の下流部とにカッター刃が設けら
れるから、真空弁の閉作動時に、弁体と弁座のシール部
に付着した夾雑物は、上記カッター刃により自動的に切
断されて排除され、当該シール部の気密が保持される。
切断された夾雑物は、真空弁の全閉までに弁下流側に流
下され、或いは次の弁開時に通過する流体(汚水)とと
もに弁下流側に流下されるものとなる。
The present invention according to claim 2 has the following effects. Since a cutter blade is provided at the tip of the valve body and the downstream portion of the valve seat, when the vacuum valve is closed, foreign matter adhering to the seal between the valve body and the valve seat is automatically cut by the cutter blade. Then, the airtightness of the seal portion is maintained.
The cut contaminants flow down to the valve downstream side by the time the vacuum valve is fully closed, or flow down to the valve downstream side together with the fluid (dirt water) that passes when the valve is opened next time.

【0011】[0011]

【実施例】図1は本発明の第1実施例が適用されてなる
汚水ますを示す模式図、図2は真空弁を示す模式図、図
3は真空弁の制御部を示す断面図、図4は真空弁の制御
部を示す他の断面図、図5は真空弁の要部拡大図、図6
は真空式下水道を示す模式図である。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing a wastewater tank to which the first embodiment of the present invention is applied, FIG. 2 is a schematic diagram showing a vacuum valve, FIG. 3 is a sectional view showing a control part of the vacuum valve, and FIG. 4 is another cross-sectional view showing the control part of the vacuum valve, FIG. 5 is an enlarged view of the main part of the vacuum valve, FIG.
[Fig. 3] is a schematic diagram showing a vacuum sewer system.

【0012】真空式下水道は、前述した図6に示した如
くに構成され、汚水ます1に真空弁2を設置している。
そして、真空弁2は、大気連通管8が導入する大気を付
与されて作動し、汚水ます1に連通する汚水吸込み管1
Aと真空源に連通する真空下水管5との間の流体通過部
28を開閉可能とする。
The vacuum sewer system is constructed as shown in FIG. 6 described above, and a vacuum valve 2 is installed in a wastewater tank 1.
The vacuum valve 2 is operated by being supplied with the atmosphere introduced by the atmosphere communication pipe 8 and communicates with the sewage tank 1.
The fluid passage 28 between A and the vacuum sewer pipe 5 communicating with the vacuum source can be opened and closed.

【0013】即ち、各家庭等から排出される汚水は、自
然流下式の汚水流入管10から汚水ます1に流れ込む。
そして、汚水が汚水ます1内に所定量溜ると、真空弁2
が開き、汚水ます1内の汚水は汚水吸込み管1Aから吸
込まれる。このとき、汚水ます1の内部には地上に立設
された通気管9を介して空気が供給され、汚水吸込み管
1Aに汚水とともに空気も吸込み、汚水はその二相流に
よって真空下水管5内を移動し、真空ポンプ場の集水タ
ンク6に集められ、ひいては圧送ポンプ7によって下水
処理場等へ送られる。
That is, the sewage discharged from each household or the like flows into the sewage masu 1 from the natural-flow-type sewage inflow pipe 10.
Then, when a predetermined amount of dirty water is accumulated in the dirty water tank 1, the vacuum valve 2
The sewage in the sewage tank 1 is sucked through the sewage suction pipe 1A. At this time, air is supplied to the inside of the sewage tank 1 through a ventilation pipe 9 which is erected on the ground, and the sewage suction pipe 1A also sucks the air together with the sewage, and the sewage flows in the vacuum sewer pipe 5 by its two-phase flow. Is moved to the sewage treatment plant or the like by the pressure pump 7.

【0014】真空弁2は、図1、図2に示す如く、第1
と第2の各ハウジング21、22をバンドクランプ23
によって一体化して構成されており、ハウジング21に
前述の流体通過部28と、弁座20とを備えている。ま
た、真空弁2は、ハウジング21内に設けられて弁座2
0に接離することにより流体通過部28を開閉する主弁
24(弁体)と、主弁24を弁座20に押圧する閉じ力
付与ばね26(押圧手段)と、閉じ力付与ばね26に抗
して主弁24を弁座20から離すための真空圧が作用す
る弁作動室25とを有している。また、真空弁2は、弁
作動室25に真空圧を付与することの制御を行なう制御
部27を有している。
The vacuum valve 2 is a first valve as shown in FIGS.
And the second housings 21 and 22 with the band clamp 23
The housing 21 is provided with the aforementioned fluid passage portion 28 and the valve seat 20. Further, the vacuum valve 2 is provided in the housing 21 and is installed in the valve seat 2
The main valve 24 (valve body) that opens and closes the fluid passage portion 28 by contacting and separating with 0, the closing force applying spring 26 (pressing means) that presses the main valve 24 against the valve seat 20, and the closing force applying spring 26. And a valve working chamber 25 against which a vacuum pressure acts to separate the main valve 24 from the valve seat 20. The vacuum valve 2 also has a control unit 27 that controls the application of vacuum pressure to the valve working chamber 25.

【0015】弁作動室25は主弁24と弁棒29を介し
て連結されているカップ状のローリングダイヤフラム付
きプランジャ30をスライド可能に収容する。
The valve working chamber 25 slidably accommodates a plunger 30 having a cup-shaped rolling diaphragm which is connected to the main valve 24 via a valve rod 29.

【0016】閉じ力付与ばね26は弁作動室25のプラ
ンジャ30より上室に内蔵されて、プランジャ30にば
ね力を及ぼし、主弁24に閉じ力を付与する。
The closing force applying spring 26 is built in the chamber above the plunger 30 of the valve operating chamber 25, exerts a spring force on the plunger 30 and applies a closing force to the main valve 24.

【0017】制御部27は、汚水ます1内の汚水レベル
の上昇時に弁作動室25に真空圧を付与して主弁24に
開き力を付与し、真空弁2を開状態として汚水吸込み管
1Aに真空下水管5を導通せしめる。
The control unit 27 applies a vacuum pressure to the valve working chamber 25 and an opening force to the main valve 24 when the level of the sewage in the sewage tank 1 rises, and opens the vacuum valve 2 to open the sewage suction pipe 1A. Then, the vacuum sewer pipe 5 is electrically connected.

【0018】然るに、真空弁2の制御部27は以下の如
くに構成されている。制御部27は、図3、図4に示す
如く、第1〜第5のシリンダ状のケース51〜55を通
しボルトで一体化して構成されている。通常第4のケー
ス54を真空弁15の第2ハウジング22にバンドクラ
ンプ36によって一体化される。
Therefore, the controller 27 of the vacuum valve 2 is constructed as follows. As shown in FIGS. 3 and 4, the control unit 27 is configured by integrating first to fifth cylindrical cases 51 to 55 with through bolts. Normally, the fourth case 54 is integrated with the second housing 22 of the vacuum valve 15 by the band clamp 36.

【0019】制御部27には、汚水ます1に連通する液
位検知管37がホース38を介して接続される液位検知
管接続口56を有している。液位検知管接続口56は第
1ケース51にダイヤフラム59を介して接続されてい
る。ダイヤフラム59には微小な貫通孔が設けられてお
り圧力が伝わるようになっている。
The control unit 27 has a liquid level detection pipe connection port 56 to which a liquid level detection pipe 37 communicating with the dirty water tank 1 is connected via a hose 38. The liquid level detection pipe connection port 56 is connected to the first case 51 via a diaphragm 59. A small through hole is provided in the diaphragm 59 so that pressure can be transmitted.

【0020】また、制御部27は、真空下水管5がホー
ス41を介して接続される真空圧接続口57を第3ケー
ス53に設けている。
The control section 27 also has a vacuum pressure connection port 57 in the third case 53 to which the vacuum sewer pipe 5 is connected via the hose 41.

【0021】また、制御部27は、大気連通管8がホー
ス44を介して接続される大気圧接続口58を第3ケー
ス53に設けている。
The control section 27 also has an atmospheric pressure connection port 58, which is connected to the atmosphere communication pipe 8 via the hose 44, in the third case 53.

【0022】尚、大気連通管8はホース46を介して、
弁作動室25のプランジャ30より下室にも連通されて
いる(図2参照)。このとき、弁作動室25のプランジ
ャ30より下室は、真空弁2の第1と第2の各ハウジン
グ21、22間に挟持される下室ハウジング47により
形成されており、下室ハウジング47にはチェック弁4
8が設けられ、下室ハウジング47の弁棒29貫通部回
りにはチェック弁カバー49が接合されている。
The atmosphere communication pipe 8 is connected via a hose 46,
The valve working chamber 25 is communicated with the lower chamber than the plunger 30 (see FIG. 2). At this time, the chamber below the plunger 30 of the valve operating chamber 25 is formed by the lower chamber housing 47 that is sandwiched between the first and second housings 21 and 22 of the vacuum valve 2. Check valve 4
8 is provided, and a check valve cover 49 is joined around the valve rod 29 penetrating portion of the lower chamber housing 47.

【0023】第1ケース51と第2ケース52は液位検
知ダイヤフラム60を介して接続されている。第1ケー
ス51の上部には液位検知ダイヤフラム60を手動で変
位できるようプランジャ61、バネ63、弾性体カバー
62で構成されるプッシュボタンを有している。第2ケ
ース52にはダイヤフラム60の下にプランジャ65
が、第3ケース53に設置した検知弁68に届くよう設
けている。第2ケース52と第3ケース53とが形成す
る圧力制御室としての上部部屋83に空気の漏洩を生じ
ないようにプランジャ65の部屋83への挿通部まわり
にはOリング67等の軸シールが設けられている。
The first case 51 and the second case 52 are connected via a liquid level detection diaphragm 60. A push button composed of a plunger 61, a spring 63, and an elastic cover 62 is provided on the upper part of the first case 51 so that the liquid level detection diaphragm 60 can be manually displaced. The second case 52 has a plunger 65 under the diaphragm 60.
However, it is provided so as to reach the detection valve 68 installed in the third case 53. A shaft seal such as an O-ring 67 is provided around the insertion portion of the plunger 65 into the chamber 83 so that air does not leak into the upper chamber 83 as a pressure control chamber formed by the second case 52 and the third case 53. It is provided.

【0024】検知弁68は、部屋83内に配設されてプ
ランジャ65により作動せしめられ、該部屋83内に真
空力を導入可能とする。即ち、第3ケース53は真空圧
接続口57に連通する通路57Aを備え、検知弁68は
通路57Aの部屋83への開口を開閉可能とするのであ
る。検知弁68は板バネ68Aの先端に通路57Aの開
口を閉塞可能とする舌片68Bを備え、板バネ68Aを
プランジャ61により弾性的に押込まれると舌片68B
を通路57Aの開口から離隔して該開口を開き、部屋8
3内に真空力を導入可能とするものである。尚、66は
プランジャ65の戻しバネである。
The detection valve 68 is disposed in the chamber 83 and is operated by the plunger 65 so that the vacuum force can be introduced into the chamber 83. That is, the third case 53 is provided with the passage 57A communicating with the vacuum pressure connection port 57, and the detection valve 68 can open and close the opening of the passage 57A to the chamber 83. The detection valve 68 is provided with a tongue piece 68B capable of closing the opening of the passage 57A at the tip of the leaf spring 68A, and when the leaf spring 68A is elastically pushed by the plunger 61, the tongue piece 68B.
Is separated from the opening of the passage 57A to open the opening, and the room 8
It is possible to introduce a vacuum force into the inside of 3. Reference numeral 66 is a return spring of the plunger 65.

【0025】第4ケース54と第5ケース55には弁座
72、73が設けられ、第4ケース54の上部部屋85
は大気に通路92を通じて連通しており、第5ケース5
5の下部部屋87は真空下水管に通路91を通じて連通
している。第4ケース54下部と第5ケース55上部で
作られる部屋86は真空弁本体の作動室25に通路93
を通じて連通している。両者の弁座72、73の間に設
けた弁体71は、上下することにより大気と真空のいず
れかを部屋86に導くよう3方弁としての役割を果たし
ている。弁体71は第3ケース53と第4ケース54と
の間に設けた3方弁ダイヤフラム70に連結され、ダイ
ヤフラム70の上部には圧縮バネ69が設けられ第5ケ
ース55の弁座73に押付けられている。第3ケース5
3には隔壁が設けられているが一部に連通口88があ
り、検知弁68が作動して開になったとき上部部屋83
に付与される真空圧を下部部屋84に通じるようになっ
ている。また、第3ケース53の上部部屋83にはニー
ドル弁74が設けられており、ニードル弁74を通って
大気が徐々に入ってくるようになっている。
Valve seats 72 and 73 are provided in the fourth case 54 and the fifth case 55, and an upper chamber 85 of the fourth case 54 is provided.
Communicates with the atmosphere through the passage 92, and the fifth case 5
The lower chamber 87 of No. 5 communicates with the vacuum sewer pipe through a passage 91. The chamber 86 formed by the lower part of the fourth case 54 and the upper part of the fifth case 55 has a passage 93 in the working chamber 25 of the vacuum valve body.
Through. The valve element 71 provided between the two valve seats 72 and 73 functions as a three-way valve so as to guide either the atmosphere or the vacuum to the chamber 86 by moving up and down. The valve body 71 is connected to a three-way valve diaphragm 70 provided between the third case 53 and the fourth case 54, and a compression spring 69 is provided above the diaphragm 70 and pressed against the valve seat 73 of the fifth case 55. Has been. Third case 5
3 is provided with a partition wall, but partly has a communication port 88, and when the detection valve 68 is activated and opened, the upper chamber 83
The vacuum pressure applied to the lower chamber 84 is communicated with the lower chamber 84. Further, a needle valve 74 is provided in the upper chamber 83 of the third case 53, and the atmosphere gradually enters through the needle valve 74.

【0026】真空弁の制御部27は以下の如く動作す
る。 汚水ます1内の液位が上昇すると、液位検知管37、
ホース38、液位検知ダイヤフラム上部室81の空気圧
力が上昇し、液位検出ダイヤフラム下部室82が大気に
連通しているため、圧力差を生じた液位検出ダイヤフラ
ム60を下方に変位させる。
The vacuum valve controller 27 operates as follows. When the liquid level in the wastewater masu 1 rises, the liquid level detection pipe 37,
Since the air pressure in the hose 38 and the liquid level detecting diaphragm upper chamber 81 rises and the liquid level detecting diaphragm lower chamber 82 communicates with the atmosphere, the liquid level detecting diaphragm 60 having a pressure difference is displaced downward.

【0027】液位検出ダイヤフラム60の下部に設け
たプランジャ65がダイヤフラム60の変位により押さ
れて下方に変位し第3ケース53の上部部屋83に設け
た検知弁68を下方に押し下げ開作動させる。
The plunger 65 provided in the lower portion of the liquid level detection diaphragm 60 is pushed by the displacement of the diaphragm 60 to be displaced downward, and the detection valve 68 provided in the upper chamber 83 of the third case 53 is pushed downward to be opened.

【0028】検知弁68の作動により第3ケース室8
3、84が真空になり、3方弁ダイヤフラム70の下方
室85が大気に連通していることから圧力差を生じたダ
イヤフラム70が下方に引上げられ、これに伴って弁体
71も上昇して第5ケース55の弁座73から第4ケー
ス54の弁座72に移動し、真空弁本体の作動室25に
通じる部屋86を真空状態にさせる。これにより真空弁
本体が開状態になり、タンク内の汚水が真空下水管5に
排出される。
By operating the detection valve 68, the third case chamber 8
The diaphragms 3 and 84 are evacuated and the lower chamber 85 of the three-way valve diaphragm 70 communicates with the atmosphere, so that the diaphragm 70 having a pressure difference is pulled downward, and the valve body 71 also rises accordingly. The chamber 86 that moves from the valve seat 73 of the fifth case 55 to the valve seat 72 of the fourth case 54 and communicates with the working chamber 25 of the vacuum valve body is brought into a vacuum state. As a result, the vacuum valve body is opened, and the dirty water in the tank is discharged to the vacuum sewer pipe 5.

【0029】タンク内の液体が排出されると、液位が
低下し、液位検出ダイヤフラム60の加圧が低下し、プ
ランジャ65に設けたバネ66により押し戻され、これ
に伴って検知バルブ68が最初の状態に閉じる。
When the liquid in the tank is discharged, the liquid level is lowered, the pressure of the liquid level detecting diaphragm 60 is lowered, and it is pushed back by the spring 66 provided on the plunger 65. Close to the initial state.

【0030】第3ケース53の部屋83にあった真空
はニードル弁74を通じて大気が取り入れられるため、
多少時間遅れが生じて大気状態になり、3方弁ダイヤフ
ラム70の両側の圧力差がなくなりバネ69に押されて
元の状態に戻り、弁体71も元の第5ケース55の弁座
73を閉じ、真空弁本体の作動室25に通じる部屋を大
気状態にさせる。これにより真空弁本体が閉状態にな
る。
Since the vacuum in the chamber 83 of the third case 53 is taken in by the atmosphere through the needle valve 74,
After a slight time lag, the atmosphere is restored, the pressure difference between the two sides of the three-way valve diaphragm 70 disappears, and the spring 69 pushes the valve back to its original state. The chamber is closed and the chamber communicating with the working chamber 25 of the vacuum valve body is brought to the atmospheric state. As a result, the vacuum valve body is closed.

【0031】然るに、本実施例において、真空弁2は、
図5に示す如く、弁棒29の先端部に固定される主弁2
4の直下にシールゴム91を設け、このシールゴム91
をシール押え92、ナット93により固定するものとし
ている。そして、主弁24の先端シール押え92の外周
に沿ってカッター刃94を設けるとともに、弁座20の
シール部下方の内周に沿ってカッター刃95を設けてい
る。本実施例のカッター刃94、95は、押切りカッタ
ーを構成し、鋼もしくはセラミックス等の硬質材料にて
構成される。尚、カッター刃94、95は、剪断カッタ
ーを構成するものであっても良い。
Therefore, in this embodiment, the vacuum valve 2 is
As shown in FIG. 5, the main valve 2 fixed to the tip of the valve rod 29
4 is provided with a seal rubber 91 immediately below the seal rubber 91.
Is fixed by a seal retainer 92 and a nut 93. A cutter blade 94 is provided along the outer circumference of the tip seal retainer 92 of the main valve 24, and a cutter blade 95 is provided along the inner circumference of the valve seat 20 below the seal portion. The cutter blades 94 and 95 of this embodiment constitute a press cutter and are made of a hard material such as steel or ceramics. In addition, the cutter blades 94 and 95 may constitute a shearing cutter.

【0032】以下、本実施例の作用について説明する。 真空弁2を通過する流体の中に混入している夾雑物
は、その流体通過部28に設けられているカッター刃9
4、95により切断される結果、真空弁2の閉作動時に
も、主弁24と弁座20との間にからみつく等によって
挟まることがなく、スムースに弁下流側に流下するもの
となる。これにより、真空弁2は必ず全閉して気密保持
でき、全システムの真空圧を確保して真空式下水道の機
能を維持する。
The operation of this embodiment will be described below. The contaminants mixed in the fluid passing through the vacuum valve 2 are the cutter blade 9 provided in the fluid passage portion 28.
As a result of being cut by 4, 95, even when the vacuum valve 2 is closed, it is not caught by the main valve 24 and the valve seat 20 due to entanglement or the like, and smoothly flows down to the downstream side of the valve. As a result, the vacuum valve 2 can be completely closed and kept airtight, the vacuum pressure of the entire system is ensured, and the function of the vacuum sewer is maintained.

【0033】主弁24の先端部と弁座20の下流部と
にカッター刃94、95が設けられるから、真空弁2の
閉作動時に、主弁24と弁座20のシール部に付着した
夾雑物は、上記カッター刃94、95により自動的に切
断されて排除され、当該シール部の気密が保持される。
切断された夾雑物は、真空弁2の全閉までに弁下流側に
流下され、或いは次の弁開時に通過する流体(汚水)と
ともに弁下流側に流下されるものとなる。
Since the cutter blades 94 and 95 are provided at the tip portion of the main valve 24 and the downstream portion of the valve seat 20, when the vacuum valve 2 is closed, the contaminants adhered to the seal portions of the main valve 24 and the valve seat 20. The object is automatically cut and removed by the cutter blades 94 and 95, and the airtightness of the seal portion is maintained.
The cut foreign matter is flowed down to the valve downstream side by the time the vacuum valve 2 is fully closed, or is flowed down to the valve downstream side together with the fluid (dirt water) that passes when the next valve is opened.

【0034】以上、本発明の実施例を図面により詳述し
たが、本発明の具体的な構成はこの実施例に限られるも
のではなく、本発明の要旨を逸脱しない範囲の設計の変
更等があっても本発明に含まれる。例えば、本発明のカ
ッター手段は、必ずしも弁体と弁座の両方に設けられ
ず、弁体と弁座のいずれか一方、もしくは弁体と弁座以
外の流体通過部に設けられるものであっても良い。ま
た、本発明の真空弁は、畜産関係用汚水収集システム等
にも適用できる。
The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific structure of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention are possible. Even if it exists, it is included in the present invention. For example, the cutter means of the present invention is not necessarily provided on both the valve body and the valve seat, but is provided on either one of the valve body and the valve seat, or a fluid passage portion other than the valve body and the valve seat. Is also good. The vacuum valve of the present invention can also be applied to a sewage collection system for livestock.

【0035】[0035]

【発明の効果】以上のように本発明によれば、真空弁を
通過する流体中に夾雑物が混入していても、これらの夾
雑物が弁体と弁座との間に挟まることを防止することが
できる。
As described above, according to the present invention, even if contaminants are mixed in the fluid passing through the vacuum valve, these contaminants are prevented from being caught between the valve body and the valve seat. can do.

【図面の簡単な説明】[Brief description of drawings]

【図1】図1は本発明の第1実施例が適用されてなる汚
水ますを示す模式図である。
FIG. 1 is a schematic diagram showing a wastewater tank to which a first embodiment of the present invention is applied.

【図2】図2は真空弁を示す模式図である。FIG. 2 is a schematic diagram showing a vacuum valve.

【図3】図3は真空弁の制御部を示す断面図である。FIG. 3 is a cross-sectional view showing a control unit of a vacuum valve.

【図4】図4は真空弁の制御部を示す他の断面図であ
る。
FIG. 4 is another cross-sectional view showing a control unit of the vacuum valve.

【図5】図5は真空弁の要部拡大図である。FIG. 5 is an enlarged view of a main part of a vacuum valve.

【図6】図6は真空式下水道を示す模式図である。FIG. 6 is a schematic diagram showing a vacuum sewer system.

【符号の説明】[Explanation of symbols]

2 真空弁 20 弁座 21、22 ハウジング 24 主弁(弁体) 25 弁作動室 26 閉じ力付与ばね(押圧手段) 94、95 カッター刃(カッター手段) 2 vacuum valve 20 valve seat 21, 22 housing 24 main valve (valve body) 25 valve working chamber 26 closing force applying spring (pressing means) 94, 95 cutter blade (cutter means)

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 流体通過部と弁座とを備えたハウジング
と、 ハウジング内に設けられて弁座に接離することにより、
流体通過部を開閉する弁体と、 弁体を弁座に押圧する押圧手段と、 押圧手段に抗して弁体を弁座から離すための真空圧が作
用する弁作動室とを有してなる真空弁において、 前記ハウジングの流体通過部に夾雑物切断用のカッター
手段を設けてなることを特徴とする夾雑物切断機構付き
真空弁。
1. A housing having a fluid passage portion and a valve seat; and a housing provided in the housing for contacting and separating from the valve seat.
It has a valve body that opens and closes the fluid passage portion, a pressing means that presses the valve body against the valve seat, and a valve working chamber in which a vacuum pressure acts to separate the valve body from the valve seat against the pressing means. A vacuum valve with a foreign matter cutting mechanism, characterized in that a cutter means for cutting foreign matter is provided in a fluid passage portion of the housing.
【請求項2】 前記カッター手段が、弁体の先端部と弁
座の下流部とにカッター刃を設けることにて構成されて
なる請求項1記載の夾雑物切断機構付き真空弁。
2. The vacuum valve with a foreign matter cutting mechanism according to claim 1, wherein the cutter means is configured by providing a cutter blade at a tip portion of the valve body and a downstream portion of the valve seat.
JP11794394A 1994-05-31 1994-05-31 Vacuum valve with impurity cutting structure Pending JPH07317954A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11794394A JPH07317954A (en) 1994-05-31 1994-05-31 Vacuum valve with impurity cutting structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11794394A JPH07317954A (en) 1994-05-31 1994-05-31 Vacuum valve with impurity cutting structure

Publications (1)

Publication Number Publication Date
JPH07317954A true JPH07317954A (en) 1995-12-08

Family

ID=14724072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11794394A Pending JPH07317954A (en) 1994-05-31 1994-05-31 Vacuum valve with impurity cutting structure

Country Status (1)

Country Link
JP (1) JPH07317954A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011252560A (en) * 2010-06-03 2011-12-15 Sekisui Chem Co Ltd Vacuum valve structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011252560A (en) * 2010-06-03 2011-12-15 Sekisui Chem Co Ltd Vacuum valve structure

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