JPH06229372A - Foot valve - Google Patents

Foot valve

Info

Publication number
JPH06229372A
JPH06229372A JP5034572A JP3457293A JPH06229372A JP H06229372 A JPH06229372 A JP H06229372A JP 5034572 A JP5034572 A JP 5034572A JP 3457293 A JP3457293 A JP 3457293A JP H06229372 A JPH06229372 A JP H06229372A
Authority
JP
Japan
Prior art keywords
foot valve
foot
liquid
pump
check valve
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
JP5034572A
Other languages
Japanese (ja)
Inventor
Yoshio Miyake
良男 三宅
Kouji Isemoto
耕司 伊勢本
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.)
Ebara Corp
Original Assignee
Ebara Corp
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 Ebara Corp filed Critical Ebara Corp
Priority to JP5034572A priority Critical patent/JPH06229372A/en
Publication of JPH06229372A publication Critical patent/JPH06229372A/en
Pending legal-status Critical Current

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  • Check Valves (AREA)
  • Details Of Valves (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

PURPOSE:To provide a foot valve capable of preventing malfunction of a check valve, and of protecting a pump located on the upstream side of the foot valve from wear and choking. CONSTITUTION:In a foot valve 1 provided in order to prevent the water pumped up in a piping by a pump, etc., from reversely flowing into a water reservoir, and to prevent a foreign matters from entering, a foot valve body part 2 provided with a cylindrical part 2a, a conical part 2b extending from the cylindrical part 2a downward, an inlet port 2c provided to the cylindrical part 2a, and an exhaust port 2c provided at the lower part of the cylindrical part 2b, a check valve 3 provided in the foot valve body part 2, and an upstream riser pipe 5 provided in the foot valve body part 2 and extending from the suction side of the check valve 3 downward, are provided.

Description

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

【0001】[0001]

【産業上の利用分野】本発明はフート弁に係り、特にポ
ンプ等により汲み上げられた配管内の水が、貯水槽に逆
流するのを防ぐとともに異物の混入を防ぐために取り付
けられたフート弁に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foot valve, and more particularly to a foot valve attached to prevent water in a pipe drawn by a pump or the like from flowing back into a water storage tank and preventing foreign matter from entering.

【0002】[0002]

【従来の技術】従来、図6に示すように、ポンプ31の
吸込配管32の下端にフート弁33を設け、このフート
弁33によって吸込配管32の落水を防止している。こ
のフート弁33は、図7に示されるように上下動可能な
弁体35を有した逆流防止弁34と、異物の混入を防ぐ
ストレーナ36とを一体化したものであった。
2. Description of the Related Art Conventionally, as shown in FIG. 6, a foot valve 33 is provided at the lower end of a suction pipe 32 of a pump 31, and the foot valve 33 prevents the suction pipe 32 from falling. The foot valve 33 was formed by integrating a check valve 34 having a vertically movable valve element 35 as shown in FIG. 7 and a strainer 36 for preventing foreign matter from entering.

【0003】一方、液体中のスラリーを連続的に分離す
るサイクロンセパレータは従来から知られている。従
来、図8に示すように、サイクロンセパレータ41は、
ポンプ31の吐出口に接続されて使用されている。固液
混合液42をポンプ31でサイクロンセパレータ41を
介して圧送し、サイクロンセパレータ41によって固体
粒子を分離し下側に排出するとともに固体粒子が取り除
かれた清澄液はサイクロンセパレータ41の上方より分
離されて圧送されるようになっている。
On the other hand, a cyclone separator which continuously separates a slurry in a liquid is conventionally known. Conventionally, as shown in FIG. 8, the cyclone separator 41 is
It is used by being connected to the discharge port of the pump 31. The solid-liquid mixed liquid 42 is pumped by the pump 31 through the cyclone separator 41, the solid particles are separated by the cyclone separator 41 and discharged downward, and the clear liquid from which the solid particles have been removed is separated from above the cyclone separator 41. Are sent under pressure.

【0004】[0004]

【発明が解決しようとする課題】上述したように従来の
フート弁は逆流防止弁と異物の混入を防ぐストレーナと
を一体にしたものであった。このため、比較的大きな異
物の吸い込みは防げるが、砂や泥等の混入を防ぐことが
できない上に、混入する異物によっては逆流防止弁が動
作不良を起こすことがあった。
As described above, the conventional foot valve has the check valve and the strainer for preventing foreign matter from being integrated. Therefore, it is possible to prevent the inhalation of a relatively large foreign matter, but it is not possible to prevent the mixing of sand, mud and the like, and the check valve may malfunction due to the foreign matter mixed.

【0005】またストレーナのスリットより小さな異物
は配管に吸い込んでしまうため、フート弁とは別に異物
除去装置を設ける必要があった。
Further, since foreign matter smaller than the slit of the strainer is sucked into the pipe, it is necessary to provide a foreign matter removing device in addition to the foot valve.

【0006】一方、上述したように液体中のスラリーを
連続的に分離するサイクロンセパレータをポンプの吐出
口に設置するという方法では、スラリー液の固液分離は
できるが、ポンプの摩耗を避けることができないという
問題点があった。
On the other hand, in the method in which the cyclone separator for continuously separating the slurry in the liquid is installed at the discharge port of the pump as described above, solid-liquid separation of the slurry liquid can be performed, but abrasion of the pump can be avoided. There was a problem that it could not be done.

【0007】本発明は上述の事情に鑑みなされたもの
で、逆流防止弁の動作不良を防止することができるとと
もにフート弁の上流側にあるポンプを摩耗及び閉塞から
保護することができるフート弁を提供することを目的と
する。
The present invention has been made in view of the above circumstances, and provides a foot valve capable of preventing malfunction of the check valve and protecting the pump upstream of the foot valve from wear and blockage. The purpose is to provide.

【0008】[0008]

【課題を解決するための手段】前述した目的を達成する
ため、本発明のフート弁は、ポンプ等により汲み上げら
れた配管内の水が貯水槽に逆流するのを防ぐとともに異
物の混入を防ぐために取り付けられたフート弁におい
て、円筒部と該円筒部より下方に延びる円錐部と前記円
筒部に設けられた吸込口と前記円錐部の下部に設けられ
た排出口とを備えたフート弁本体部と、前記フート弁本
体部内に設けられた逆止弁と、前記フート弁本体部内に
設けられるとともに前記逆止弁の吸込側より下方に延び
る上流上昇管とを備えたことを特徴とするものである。
In order to achieve the above-mentioned object, the foot valve of the present invention is intended to prevent the water in the pipe pumped up by a pump or the like from flowing back into the water storage tank and preventing the entry of foreign matter. In the attached foot valve, a foot valve main body section having a cylindrical portion, a conical portion extending downward from the cylindrical portion, a suction port provided in the cylindrical portion, and a discharge port provided in a lower portion of the conical portion. A check valve provided in the foot valve main body, and an upstream rising pipe provided in the foot valve main body and extending downward from a suction side of the check valve. .

【0009】[0009]

【作用】前述した構成からなる本発明によれば、固液混
合液は吸込口よりフート弁本体部内に吸い込まれ、円筒
部の壁に近い部分を回転しながら円錐部へ進み、液中の
粒子は遠心力により周壁部の方へ集められ円錐面に沿っ
て流下し、排出口から下流として連続的に流出する。一
方、粒子を分離した液は中心付近の上昇渦部を上昇して
上流上昇管を通って逆止弁を通過して吸込配管に至り、
この吸込配管からポンプに吸い込まれポンプにより昇圧
されて圧送される。
According to the present invention having the above-mentioned structure, the solid-liquid mixed liquid is sucked into the foot valve main body through the suction port and advances to the conical portion while rotating the portion near the wall of the cylindrical portion, and the particles in the liquid are Are collected by the centrifugal force toward the peripheral wall, flow down along the conical surface, and continuously flow out downstream from the outlet. On the other hand, the liquid from which the particles have been separated rises in the rising vortex part near the center, passes through the upstream rising pipe, passes the check valve, and reaches the suction pipe,
It is sucked into the pump through this suction pipe and the pressure is increased by the pump and is sent under pressure.

【0010】[0010]

【実施例】以下、本発明に係るフート弁を図1及び図2
を参照して説明する。図1は、本発明のフート弁を示す
断面図であり、フート弁1は円筒部2aと円筒部2aよ
り下方に延びる円錐部2bとを備えたフート弁本体部2
を備えている。円筒部2aには、図2(図1のII−II線
断面図)に示されるように、外周部から接線方向に延び
る2個の吸込口2cが開口している。そして、円筒部2
aの上部には吐出開口2dが形成され、円錐部2bの下
端には排出口2eが形成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A foot valve according to the present invention will be described below with reference to FIGS.
Will be described with reference to. FIG. 1 is a cross-sectional view showing a foot valve according to the present invention. The foot valve 1 has a foot valve main body portion 2 having a cylindrical portion 2a and a conical portion 2b extending downward from the cylindrical portion 2a.
Is equipped with. As shown in FIG. 2 (a sectional view taken along the line II-II in FIG. 1), the cylindrical portion 2a is provided with two suction ports 2c extending tangentially from the outer peripheral portion. And the cylindrical portion 2
A discharge opening 2d is formed in the upper part of a, and a discharge port 2e is formed in the lower end of the conical portion 2b.

【0011】またフート弁本体部2の円筒部2a内に
は、その上部に、弁体4を備えた逆止弁3が設けられて
おり、この逆止弁3の吸込側より下方に上流上昇管5が
延設されている。
A check valve 3 having a valve body 4 is provided in the upper portion of the cylindrical portion 2a of the foot valve body 2, and the check valve 3 rises upstream from a suction side thereof. The pipe 5 is extended.

【0012】次に、前述のように構成されたフート弁の
作用を説明する。吸込口2cよりフート弁本体部2内に
吸い込まれた固液混合液は、図1の矢印で示されるよう
に円筒部2aの壁に近い部分を回転しながら円錐部2b
に進み、液中の粒子は遠心力により周壁部の方へ集めら
れ円錐面に沿って流下し、排出口2eから下流として連
続的に流出する。一方、粒子を分離した清澄液は、図1
の矢印で示されるように中心付近の上昇渦部を上昇して
上流上昇管5を通って逆止弁4を通過し、更に吐出開口
2dを通過して吸込配管6に至る。
Next, the operation of the foot valve constructed as described above will be described. The solid-liquid mixed liquid sucked into the foot valve main body 2 through the suction port 2c rotates the portion near the wall of the cylindrical portion 2a as shown by the arrow in FIG. 1 while rotating the conical portion 2b.
The particles in the liquid are collected by the centrifugal force toward the peripheral wall portion, flow down along the conical surface, and continuously flow out as a downstream from the discharge port 2e. On the other hand, the clarified liquid from which the particles have been separated is shown in FIG.
As indicated by the arrow, the rising vortex portion near the center is raised, passes through the upstream rising pipe 5 and the check valve 4, and further passes through the discharge opening 2d to reach the suction pipe 6.

【0013】従って、本実施例によれば、固液混合液は
フート弁本体部2内で分離され、固体と若干の液体は排
出口2eから外部へ排出され、清澄液のみが上流上昇管
5を通って逆止弁4を通過しポンプに流入する。そのた
め、逆止弁4が異物噛み込みにより動作不良を起こすこ
とを防止することができる。またポンプ等の機器類に到
る前に、スラリー液を固体と液体に分離することができ
るため、これらポンプ等の機器類を特別な材質や構造と
する必要がなく、コスト低減を図ることができる。
Therefore, according to the present embodiment, the solid-liquid mixed liquid is separated in the foot valve main body 2, the solid and some liquid are discharged to the outside through the discharge port 2e, and only the clear liquid is supplied to the upstream riser pipe 5. Through the check valve 4 and into the pump. Therefore, the check valve 4 can be prevented from malfunctioning due to foreign matter being caught. Further, since the slurry liquid can be separated into a solid and a liquid before reaching the devices such as pumps, it is not necessary to make the devices such as pumps special materials or structures, and the cost can be reduced. it can.

【0014】次に前述のように構成されたフート弁の使
用方法を図3乃至図5を参照して説明する。図3に示す
フート弁の使用方法では、フート弁1は吸込配管6の下
端に設置されており、吸込配管6はポンプ10に接続さ
れている。フート弁本体部2の排出口2eは貯水槽11
内に開口している。本実施例においては、貯水槽11内
の固液混合液12はフート弁本体部2内に吸い込まれ個
体と液体に分離される。そして、分離された後、固形物
及び若干の液体は、円錐部2bの下部の排出口2eから
貯水槽11に戻され、清澄液だけが吐出開口2dを通っ
て吸込配管6を介してポンプ10に吸い上げられる。
Next, a method of using the foot valve configured as described above will be described with reference to FIGS. 3 to 5. In the method of using the foot valve shown in FIG. 3, the foot valve 1 is installed at the lower end of the suction pipe 6, and the suction pipe 6 is connected to the pump 10. The outlet 2e of the foot valve body 2 is a water tank 11.
It has an opening inside. In this embodiment, the solid-liquid mixed liquid 12 in the water storage tank 11 is sucked into the foot valve main body 2 and separated into solid and liquid. Then, after being separated, the solid matter and some liquid are returned to the water storage tank 11 from the discharge port 2e at the lower portion of the conical portion 2b, and only the clarified liquid passes through the discharge opening 2d and the suction pipe 6 and the pump 10 Is sucked up by.

【0015】図4に示すフート弁の使用方法では、貯水
槽11に隣接して貯留タンク13が設置されており、フ
ート弁本体部2の排出口2eには排出管14が接続され
ており、フート弁1によって分離された固形物及び若干
の液体は貯留タンク13に排出されるようになってい
る。その他の構成は図3の使用例と同様である。
In the method of using the foot valve shown in FIG. 4, a storage tank 13 is installed adjacent to the water storage tank 11, and a discharge pipe 14 is connected to the discharge port 2e of the foot valve body 2. The solid matter and some liquid separated by the foot valve 1 are discharged to the storage tank 13. Other configurations are similar to those of the usage example of FIG.

【0016】図5に示すフート弁の使用方法では、フー
ト弁本体部2の排出口2eに接続された排出管14の途
中にスラリーポンプ15が設置されている。従ってフー
ト弁1によって固液分離され排出口2eから排出された
固形物及び若干の液体は、スラリーポンプ15により強
制的に貯留タンク13に排出されるもので、高い分離性
能が求められる場合に好適に使用される。その他の構成
は図3の使用例と同様である。
In the method of using the foot valve shown in FIG. 5, the slurry pump 15 is installed in the middle of the discharge pipe 14 connected to the discharge port 2e of the foot valve main body 2. Therefore, the solid material and a small amount of liquid which are solid-liquid separated by the foot valve 1 and are discharged from the discharge port 2e are forcibly discharged to the storage tank 13 by the slurry pump 15, which is suitable when high separation performance is required. Used for. Other configurations are similar to those of the usage example of FIG.

【0017】[0017]

【発明の効果】以上説明したように本発明によれば、固
液混合液は逆止弁の吸込側で固液分離され、清澄な液体
のみが逆止弁及び逆止弁の先に送水される。従って、逆
止弁を通過するのは分離された清澄な液体のみになるた
め、逆止弁には固体(砂や泥)が行かないため、これら
固体の噛み込みによる動作不良を起こすことがない。
As described above, according to the present invention, the solid-liquid mixed liquid is solid-liquid separated on the suction side of the check valve, and only clear liquid is sent to the check valve and the tip of the check valve. It Therefore, since only the separated clear liquid passes through the check valve, solids (sand or mud) do not go into the check valve, so that malfunctions due to the trapping of these solids do not occur. .

【0018】また本発明によれば、ポンプ等の機器に到
る前に固体と液体に分離されるため、ポンプ等の機器類
に固液混合液に対して強い耐摩耗性材料等を使用しなく
て済み、また特別の構造にする必要がない。しかも、本
発明によれば、ストレーナ等によるポンプ保護と異な
り、清掃メンテナンスが不要で、連続使用に耐えること
ができる。
Further, according to the present invention, since it is separated into a solid and a liquid before reaching a device such as a pump, a wear-resistant material which is strong against a solid-liquid mixed liquid is used for the device such as a pump. It is unnecessary, and there is no need for a special structure. Moreover, according to the present invention, unlike pump protection using a strainer or the like, cleaning maintenance is unnecessary and continuous use can be endured.

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

【図1】本発明に係るフート弁の一実施例を示す断面図
である。
FIG. 1 is a sectional view showing an embodiment of a foot valve according to the present invention.

【図2】図1のII−II線断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.

【図3】本発明に係るフート弁の使用方法を示す説明図
である。
FIG. 3 is an explanatory view showing a method of using the foot valve according to the present invention.

【図4】本発明に係るフート弁の使用方法を示す説明図
である。
FIG. 4 is an explanatory view showing a method of using the foot valve according to the present invention.

【図5】本発明に係るフート弁の使用方法を示す説明図
である。
FIG. 5 is an explanatory view showing a method of using the foot valve according to the present invention.

【図6】従来のフート弁の使用方法を示す説明図であ
る。
FIG. 6 is an explanatory view showing a method of using a conventional foot valve.

【図7】従来のフート弁の断面図である。FIG. 7 is a cross-sectional view of a conventional foot valve.

【図8】従来のサイクロンセパレータの使用方法を示す
説明図である。
FIG. 8 is an explanatory diagram showing a method of using a conventional cyclone separator.

【符号の説明】[Explanation of symbols]

1 フート弁 2 フート弁本体部 3 逆止弁 4 弁体 5 上流上昇管 6 吸込配管 10 ポンプ 11 貯水槽 13 貯留タンク 14 排出管 15 スラリーポンプ 1 foot valve 2 foot valve main body 3 check valve 4 valve body 5 upstream riser pipe 6 suction pipe 10 pump 11 water tank 13 storage tank 14 discharge pipe 15 slurry pump

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 ポンプ等により汲み上げられた配管内の
水が貯水槽に逆流するのを防ぐとともに異物の混入を防
ぐために取り付けられたフート弁において、円筒部と該
円筒部より下方に延びる円錐部と前記円筒部に設けられ
た吸込口と前記円錐部の下部に設けられた排出口とを備
えたフート弁本体部と、前記フート弁本体部内に設けら
れた逆止弁と、前記フート弁本体部内に設けられるとと
もに前記逆止弁の吸込側より下方に延びる上流上昇管と
を備えたことを特徴とするフート弁。
1. A foot valve mounted to prevent water in a pipe drawn up by a pump or the like from flowing back into a water tank and to prevent foreign matter from entering, a cylindrical portion and a conical portion extending below the cylindrical portion. And a foot valve main body having an inlet provided in the cylindrical portion and an outlet provided in a lower portion of the conical portion, a check valve provided in the foot valve main body, and the foot valve main body A foot valve, comprising: an upstream ascending pipe provided inside the portion and extending downward from a suction side of the check valve.
JP5034572A 1993-01-29 1993-01-29 Foot valve Pending JPH06229372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5034572A JPH06229372A (en) 1993-01-29 1993-01-29 Foot valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5034572A JPH06229372A (en) 1993-01-29 1993-01-29 Foot valve

Publications (1)

Publication Number Publication Date
JPH06229372A true JPH06229372A (en) 1994-08-16

Family

ID=12418048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5034572A Pending JPH06229372A (en) 1993-01-29 1993-01-29 Foot valve

Country Status (1)

Country Link
JP (1) JPH06229372A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967130A2 (en) 1994-09-26 1999-12-29 Denso Corporation Vehicular anti-theft system
WO2012053231A1 (en) * 2010-10-20 2012-04-26 日本オイルポンプ株式会社 Pump device
JP5582549B2 (en) * 2010-10-20 2014-09-03 日本オイルポンプ株式会社 Pump device
JPWO2014073054A1 (en) * 2012-11-07 2016-09-08 日本オイルポンプ株式会社 Pump device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0967130A2 (en) 1994-09-26 1999-12-29 Denso Corporation Vehicular anti-theft system
WO2012053231A1 (en) * 2010-10-20 2012-04-26 日本オイルポンプ株式会社 Pump device
JP5582549B2 (en) * 2010-10-20 2014-09-03 日本オイルポンプ株式会社 Pump device
US9422926B2 (en) 2010-10-20 2016-08-23 Nippon Oil Pump Co., Ltd. Pump device
JPWO2014073054A1 (en) * 2012-11-07 2016-09-08 日本オイルポンプ株式会社 Pump device

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