JP6822909B2

JP6822909B2 - Check valve device

Info

Publication number: JP6822909B2
Application number: JP2017128318A
Authority: JP
Inventors: 佳郎杉山; 良治淺野; 菅原　宏; 宏菅原
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2017-06-30
Filing date: 2017-06-30
Publication date: 2021-01-27
Anticipated expiration: 2037-06-30
Also published as: JP2019011810A

Description

本発明は、地中構造体のウイープホールに設置される逆止弁装置に関する。 The present invention relates to a check valve device installed in a weep hole of an underground structure.

下水管等の既設管の老朽化対策として、既設管内周を更生管でライニングして更生した場合、既設管の外側の水圧により既設管のヒビ割れを介して更生管が径方向内側に膨れる現象（盤膨れ）が発生することがある。
その対策として既設管と更生管との間にモルタル等の裏込め材を充填し、既設管と更生管との間に付着性を高めているが、外水圧が高い場合には裏込め材の既設管、更生管からの剥離が生じ、更生管が膨らんだりする現象を防ぎきれない。 As a measure against the deterioration of existing pipes such as sewage pipes, when the inner circumference of the existing pipe is lined with a rehabilitation pipe and rehabilitated, the rehabilitation pipe swells inward in the radial direction due to the water pressure outside the existing pipe through cracks in the existing pipe. (Board swelling) may occur.
As a countermeasure, a backfill material such as mortar is filled between the existing pipe and the rehabilitation pipe to improve the adhesion between the existing pipe and the rehabilitation pipe, but when the external water pressure is high, the backfill material is used. It is not possible to prevent the phenomenon that the rehabilitation pipe swells due to peeling from the existing pipe and the rehabilitation pipe.

そこで、更生管と既設管を貫通するウイープホール（水抜き穴）を形成し、外水圧の上昇時に外水を、ウイープホールを介して更生管内の水路に逃がすことにより外水圧を抑えているが、単にウイープホールを形成しただけでは、更生管の水路から下水等がウイープホールを介して外部に漏れてしまう。 Therefore, a weep hole (drainage hole) that penetrates the rehabilitation pipe and the existing pipe is formed, and when the external water pressure rises, the external water is released to the water channel inside the rehabilitation pipe through the weep hole to suppress the external water pressure. If only the weep hole is formed, sewage or the like leaks from the channel of the rehabilitation pipe to the outside through the weep hole.

特許文献１は、ウイープホールに設置される逆止弁装置を開示している。この逆止弁装置は、外水圧が上昇した時に開くことによって、外水を更生管の水路へ逃がす。これにより、裏込め材の剥離を防止し、外水圧による既設管や更生管の変形を防止する。一方、更生管の水路の内圧が高まった時には、逆止弁装置が閉じることによって、水路内の水がウイープホールを通って地中へ流出するのを防止する。 Patent Document 1 discloses a check valve device installed in a weep hole. This check valve device opens when the external water pressure rises to allow the external water to escape to the water channel of the rehabilitation pipe. This prevents peeling of the backfill material and prevents deformation of the existing pipe and rehabilitation pipe due to external water pressure. On the other hand, when the internal pressure of the water channel of the rehabilitation pipe increases, the check valve device closes to prevent the water in the water channel from flowing out to the ground through the weep hole.

特許文献２にも、地中構造体のウイープホールに設置された逆止弁装置が開示されている。この逆止弁装置も、特許文献１の逆止弁装置と同様に動作する。 Patent Document 2 also discloses a check valve device installed in a weep hole of an underground structure. This check valve device also operates in the same manner as the check valve device of Patent Document 1.

特開２００６−１８１８６２号公報Japanese Unexamined Patent Publication No. 2006-181862 特開２００６−１６８６２号公報Japanese Unexamined Patent Publication No. 2006-16862

特許文献１、２の逆止弁装置では、逆止弁装置の弁体の動作領域に水路を流れる水に含まれる砂等の異物が堆積することがあり、逆止弁装置の機能を損なう可能性があった。 In the check valve devices of Patent Documents 1 and 2, foreign matter such as sand contained in the water flowing through the water channel may accumulate in the operating region of the valve body of the check valve device, which may impair the function of the check valve device. There was sex.

上記課題を解決するために、本発明は、水路を有する地中構造体のウイープホール内に設置される逆止弁装置において、
上記ウイープホール内に設置されるとともに流路を有する弁ボデイと、上記弁ボデイに形成され上記水路側を向く主弁座と、この主弁座に接離する主弁体とを有し、上記水路に向かう流れを許容し逆方向の流れを禁じる主逆止弁と、
上記主弁体の動作領域より上記ウイープホールの開口側に配置され、上記水路に向かう流れを許容しつつ、上記水路から上記主弁体の動作領域への異物侵入を規制する保護手段と、
を備えたことを特徴とする。 In order to solve the above problems, the present invention provides a check valve device installed in a weep hole of an underground structure having a water channel.
A valve body installed in the weep hole and having a flow path, a main valve seat formed in the valve body and facing the water channel side, and a main valve body in contact with and separated from the main valve seat, and the water channel A main check valve that allows the flow toward and prohibits the flow in the opposite direction,
A protective means that is arranged on the opening side of the weep hole from the operating region of the main valve body and regulates foreign matter from entering the operating region of the main valve body from the water channel while allowing the flow toward the water channel.
It is characterized by being equipped with.

上記構成によれば、主弁体の動作領域に異物が侵入するのを規制するため、主弁体の正常な動作を維持できる。その結果、地中の外水圧による地中構造体への悪影響を無くしつつ、地中構造体の水路からの水の流出を禁じる役割を、長期にわたって維持することができる。 According to the above configuration, since foreign matter is restricted from entering the operating region of the main valve body, normal operation of the main valve body can be maintained. As a result, it is possible to maintain the role of prohibiting the outflow of water from the water channel of the underground structure for a long period of time while eliminating the adverse effect on the underground structure due to the external water pressure in the ground.

好ましくは、上記保護手段が副逆止弁を含み、この副逆止弁は、上記ウイープホールの開口端部に配置され、上記水路を向く副弁座と、この副弁座に接離する副弁体とを有し、上記水路に向かう流れを許容し逆方向の流れを禁じる。
上記構成によれば、副逆止弁を用いることにより、確実に主逆止弁の弁体の動作領域での異物堆積を防止することができる。また、副逆止弁がウイープホールの開口端部に配置されているので、この副逆止弁の副弁体の動作領域への異物堆積を回避ないしは抑制でき、副逆止弁の正常な動作を確保することができる。 Preferably, the protective means includes a secondary check valve, which is located at the open end of the weep hole and faces the water channel and a secondary valve that is in contact with and detached from the secondary valve seat. It has a body and allows the flow toward the waterway and prohibits the flow in the opposite direction.
According to the above configuration, by using the secondary check valve, it is possible to reliably prevent foreign matter from accumulating in the operating region of the valve body of the main check valve. Further, since the secondary check valve is arranged at the open end of the weep hole , it is possible to avoid or suppress the accumulation of foreign matter in the operating region of the secondary check valve of the secondary check valve, and the normal operation of the secondary check valve can be performed. Can be secured.

好ましくは、上記副逆止弁が上記主逆止弁と上記弁ボデイを共有し、上記弁ボデイが筒形状をなして上記ウイープホールと同軸に配置され、その開口端部が上記地中構造体の内周において上記水路に臨んでおり、上記副弁座と上記副弁体が上記弁ボデイの開口端部に配置されている。
上記構成によれば、主逆止弁と副逆止弁が弁ボデイを共有しているので、逆止弁装置の構成の簡略化を図ることができるとともに、ユニット化された逆止弁装置をウイープホールへ作業性良く装着することができる。 Preferably, the sub-check valve shares the valve body with the main check valve, the valve body has a tubular shape and is arranged coaxially with the weep hole, and the open end portion thereof is of the underground structure. It faces the water channel on the inner circumference, and the sub-valve seat and the sub-valve body are arranged at the open end of the valve body.
According to the above configuration, since the main check valve and the sub check valve share the valve body, the configuration of the check valve device can be simplified and the unitized check valve device can be used. It can be installed in the weep hole with good workability.

好ましくは、上記副弁座が上記弁ボデイの上記水路に臨む先端面から後退した位置にあり、上記弁ボデイの開口端部内周と上記副弁座により形成される浅い凹部に上記副弁体が収容されている。
上記構成によれば、副弁体が水路の流れに晒されず、安定した動作を確保できる。また、副弁体が水路内の流れを乱すこともない。 Preferably, the sub-valve seat is located at a position retracted from the tip surface of the valve body facing the water channel, and the sub-valve body is placed in a shallow recess formed by the inner circumference of the opening end of the valve body and the sub-valve seat. It is contained.
According to the above configuration, the auxiliary valve body is not exposed to the flow of the water channel, and stable operation can be ensured. In addition, the auxiliary valve body does not disturb the flow in the water channel.

一形態では、上記弁ボデイは、上記流路の中央に配置された中央支持部を有し、上記副弁座がこの中央支持部の周囲に形成されており、上記副弁体が弾性材料からなり、その中央部が上記中央支持部に固定されており、その周辺部が弾性変形により上記副弁座から離れることにより上記水路に向かう流れを許容し、上記周辺部が上記副弁座に接することにより、逆方向の流れを禁じる。
上記構成によれば、副逆止弁を簡単な構成とすることができ、水路内の異物による悪影響を最小限にすることができる。 In one form, the valve body has a central support portion located in the center of the flow path, the sub-valve seat is formed around the central support portion, and the sub-valve body is made of an elastic material. The central portion thereof is fixed to the central support portion, and the peripheral portion thereof is separated from the sub-valve seat by elastic deformation to allow the flow toward the water channel, and the peripheral portion is in contact with the sub-valve seat. By doing so, the flow in the opposite direction is prohibited.
According to the above configuration, the secondary check valve can be made a simple configuration, and the adverse effect of foreign matter in the water channel can be minimized.

他の形態では、上記副弁体は板バネからなり、上記水路の上流側の一端が上記弁ボデイに固定され、上記水路の下流側の他端が自由端となっている。
上記構成によれば、副逆止弁を簡単な構成とすることができ、水路内の異物による悪影響を最小限にすることができる。また、副弁体を水路の上流側で固定したので、開いた時に水路からの水の流入を防ぐことができる。 In another form, the auxiliary valve body is made of a leaf spring, one end on the upstream side of the water channel is fixed to the valve body, and the other end on the downstream side of the water channel is a free end.
According to the above configuration, the secondary check valve can be made a simple configuration, and the adverse effect of foreign matter in the water channel can be minimized. Further, since the auxiliary valve body is fixed on the upstream side of the water channel, it is possible to prevent the inflow of water from the water channel when it is opened.

さらに他の形態では、上記副弁体は、上記水路の上流側の一端が上記弁ボデイに回動可能に支持され、上記水路の下流側の他端が自由端となっている。
上記構成によれば、副逆止弁を簡単な構成とすることができ、水路内の異物による悪影響を最小限にすることができる。また、副弁体を水路の上流側で固定したので、開いた時に水路からの水の流入を防ぐことができる。 In still another form, in the auxiliary valve body, one end on the upstream side of the water channel is rotatably supported by the valve body, and the other end on the downstream side of the water channel is a free end.
According to the above configuration, the secondary check valve can be made a simple configuration, and the adverse effect of foreign matter in the water channel can be minimized. Further, since the auxiliary valve body is fixed on the upstream side of the water channel, it is possible to prevent the inflow of water from the water channel when it is opened.

さらに他の形態では、上記弁ボデイは、上記流路の中央に配置された中央支持部を有し、上記副弁座がこの中央支持部の周囲に形成されており、上記副弁体は上記中央支持部に、上記弁ボデイの軸線方向に移動可能に支持されている。 In yet another form, the valve body has a central support portion located in the center of the flow path, the sub-valve seat is formed around the central support portion, and the sub-valve body is the above-mentioned sub-valve body. A central support portion is movably supported in the axial direction of the valve body.

さらに他の形態では、上記保護手段は上記ウイープホールの開口を覆う扁平なフードを含み、このフードは、上記水路の下流側だけが開放されている。
上記構成によれば、保護手段の構成を簡略化することができる。 In yet another form, the protective means includes a flat hood that covers the opening of the weep hole, the hood being open only on the downstream side of the channel.
According to the above configuration, the configuration of the protective means can be simplified.

上記保護手段は、上記ウイープホールの開口端部に配置されてフィルタを含むことを特徴とする請求項１に記載の逆止弁装置。
上記構成によれば、保護手段の構成を簡略化することができる。 The check valve device according to claim 1, wherein the protective means is arranged at an open end of the weep hole and includes a filter.
According to the above configuration, the configuration of the protective means can be simplified.

さらに他の形態では、上記主逆止弁の上記主弁体は、上記ウイープホールの軸線方向に移動可能であり、上記主弁体の上記水路側の面には、上記保護手段として弾性材料からなる閉塞部材が取り付けられており、この閉塞部材は、上記弁ボデイの内周に接することにより、少なくとも上記主弁体の動作領域において上記流路を塞いでおり、上記主弁体が上記主弁座から離れた時に、上記閉塞部材の外周部の少なくとも一部が、上記水路に向かう水の圧力により径方向内方向に弾性変形して上記弁ボデイの内周から離れ、上記水路への水の流れを許容する。
上記構成によれば、保護手段の構成を簡略化することができる。 In still another form, the main valve body of the main check valve is movable in the axial direction of the weep hole, and the surface of the main valve body on the waterway side is made of an elastic material as the protective means. A closing member is attached, and the closing member is in contact with the inner circumference of the valve body to block the flow path at least in the operating region of the main valve body, and the main valve body is the main valve seat. When separated from, at least a part of the outer peripheral portion of the closing member is elastically deformed in the radial inward direction due to the pressure of water toward the water channel and separated from the inner circumference of the valve body, and the flow of water to the water channel. Tolerate.
According to the above configuration, the configuration of the protective means can be simplified.

本発明の他の態様は、水路を有する地中構造体のウイープホール内に設置される逆止弁装置において、
上記ウイープホール内に設置されるとともに流路を有する弁ボデイと、上記弁ボデイに固定された弁体とを有し、上記弁体は、弾性材料からなり、その中央を含む部位が周方向に複数に分割され、これら分割部分の上記水路と反対側の面は、中央に向かって傾斜した受圧面として提供され、上記分割部分の上記受圧面が上記水路に向かう水の圧力を受けた時には、上記分割部分が互いに径方向に離れて上記流路を開き、これにより上記水路に向かう流れを許容し、上記分割部分の上記水路側の面が水圧を受けた時には、上記分割部分が互いに接することにより上記流路の閉じ状態を維持し、これにより逆方向の流れを禁じることを特徴とする。
上記構成によれば、逆止弁装置の弁体の分割部分を径方向に弾性変形することにより流路を開閉するため、異物堆積の影響を受けずに長期にわたって正常な動作を確保することができる。 Another aspect of the present invention is in a check valve device installed in a weep hole of an underground structure having a water channel.
It has a valve body installed in the weep hole and having a flow path, and a valve body fixed to the valve body. The valve body is made of an elastic material and has a plurality of portions including the center thereof in the circumferential direction. The surface of these divided portions opposite to the water channel is provided as a pressure receiving surface inclined toward the center, and when the pressure receiving surface of the divided portion receives the pressure of water toward the water channel, the above The divided portions are separated from each other in the radial direction to open the flow path, thereby allowing the flow toward the water channel, and when the surface of the divided portion on the water channel side receives water pressure, the divided portions come into contact with each other. It is characterized in that the closed state of the flow path is maintained, thereby prohibiting the flow in the reverse direction.
According to the above configuration, since the flow path is opened and closed by elastically deforming the divided portion of the valve body of the check valve device in the radial direction, normal operation can be ensured for a long period of time without being affected by foreign matter accumulation. it can.

本発明によれば、水路中の異物による影響を受けずに逆止弁装置の正常な動作を確保することができる。その結果、地中の外水圧による地中構造体への悪影響を無くしつつ、地中構造体の水路からの水の流出を禁じる役割を、長期にわたって維持することができる。 According to the present invention, the normal operation of the check valve device can be ensured without being affected by foreign matter in the water channel. As a result, it is possible to maintain the role of prohibiting the outflow of water from the water channel of the underground structure for a long period of time while eliminating the adverse effect on the underground structure due to the external water pressure in the ground.

本発明の第１実施形態に係る逆止弁装置を示す断面図であり、（Ａ）は閉じ状態、（Ｂ）は開き状態をそれぞれ示す。It is sectional drawing which shows the check valve device which concerns on 1st Embodiment of this invention, (A) shows the closed state, (B) shows the open state respectively. 本発明の第２実施形態に係る逆止弁装置を示す断面図であり、（Ａ）は閉じ状態、（Ｂ）は開き状態をそれぞれ示す。It is sectional drawing which shows the check valve device which concerns on 2nd Embodiment of this invention, (A) shows the closed state, (B) shows the open state respectively. 本発明の第３実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 3rd Embodiment of this invention. 本発明の第４実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 4th Embodiment of this invention. 本発明の第５実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 5th Embodiment of this invention. 本発明の第６実施形態に係る逆止弁装置を示す断面図であり、（Ａ）は閉じ状態、（Ｂ）は開き状態をそれぞれ示す。It is sectional drawing which shows the check valve device which concerns on 6th Embodiment of this invention, (A) shows the closed state, (B) shows the open state respectively. 本発明の第７実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 7th Embodiment of this invention. 本発明の第８実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 8th Embodiment of this invention. 本発明の第９実施形態に係る逆止弁装置を示す断面図であり、（Ａ）は閉じ状態、（Ｂ）は開き状態をそれぞれ示す。It is sectional drawing which shows the check valve device which concerns on 9th Embodiment of this invention, (A) shows the closed state, (B) shows the open state respectively. 本発明の第１０実施形態に係る逆止弁装置を示す断面図である。It is sectional drawing which shows the check valve device which concerns on 10th Embodiment of this invention.

以下、本発明の実施形態を図面にしたがって説明する。
［第１実施形態］
図１は、地中の下水道管等の老朽化した既設管２を、その内部に更生管３を配置することにより更生した状態を示す。既設管２と更生管３との間には裏込め材４が充填されている。既設管２と更生管３と裏込め材４により、本実施形態の地中構造体１が構成されている。更生管３の内部空間が、下水等の水が流れる水路５として提供される。図１において水の流れ方向を符号Ｆで示す。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 shows a state in which an old existing pipe 2 such as an underground sewer pipe is rehabilitated by arranging a rehabilitation pipe 3 inside the existing pipe 2. A backfill material 4 is filled between the existing pipe 2 and the rehabilitation pipe 3. The underground structure 1 of the present embodiment is composed of the existing pipe 2, the rehabilitation pipe 3, and the backfill material 4. The internal space of the rehabilitation pipe 3 is provided as a water channel 5 through which water such as sewage flows. In FIG. 1, the water flow direction is indicated by reference numeral F.

上記地中構造体１の上部または側部には、径方向に貫通する直管状のウイープホール管６が貫通している。ウイープホール管６の内部通路がウイープホール６ａとして提供される。ウイープホール管６の水路５側の開口端６ａは、更生管３の内周と一致している。ウイープホール管６は既設管２の外周から径方向外方向に突出しており、この突出端部には多数の穴が形成されており、地中の水（外水）をウイープホール６ａへ導くことができるようになっている。 A straight tubular weep hole pipe 6 penetrating in the radial direction penetrates the upper portion or the side portion of the underground structure 1. The internal passage of the weep hole tube 6 is provided as the weep hole 6a. The opening end 6a of the weep hole pipe 6 on the water channel 5 side coincides with the inner circumference of the rehabilitation pipe 3. The weep hole pipe 6 protrudes radially outward from the outer circumference of the existing pipe 2, and a large number of holes are formed at the protruding end portion, so that underground water (outside water) can be guided to the weep hole 6a. It has become like.

上記ウイープホール６ａ内には、逆止弁装置７が装着されている。この逆止弁装置７は、主逆止弁８と副逆止弁９（保護手段）とを１つのユニットに組み込むことにより構成されている。逆止弁装置７は、主逆止弁８と副逆止弁９が共有する略円筒形状の弁ボデイ１０を備えている。弁ボデイ１０内の流路１０ａは、上記ウイープホール６ａの一部として提供される。 A check valve device 7 is mounted in the weep hole 6a. The check valve device 7 is configured by incorporating a main check valve 8 and a sub check valve 9 (protective means) into one unit. The check valve device 7 includes a substantially cylindrical valve body 10 shared by the main check valve 8 and the sub-check valve 9. The flow path 10a in the valve body 10 is provided as part of the weep hole 6a.

弁ボデイ１０は、円筒形状の弁筐１１と、主弁座部材１２と、弁座押さえ１３と、副弁座部材１４とを備えている。弁筐１１の外周には雄ねじ１１ａが形成されており、この雄ねじ１１ａをウイープホール管６の開口端部の内周の雌ねじ６ｂに螺合することにより、弁匡１１がウイープホール管６の開口端部に取り付けられている。弁筐１１の水路５側の端には径方向外方向に張り出した環状の鍔部１１ｂが形成されており、この鍔部１１ｂがウイープホール管６と更生管３の貫通穴３ａを覆っている。 The valve body 10 includes a cylindrical valve housing 11, a main valve seat member 12, a valve seat retainer 13, and a sub valve seat member 14. A male screw 11a is formed on the outer circumference of the valve housing 11, and by screwing the male screw 11a into the female screw 6b on the inner circumference of the opening end of the weep hole pipe 6, the valve box 11 is formed at the opening end of the weep hole pipe 6. It is attached to. An annular flange portion 11b projecting outward in the radial direction is formed at the end of the valve housing 11 on the water channel 5 side, and this flange portion 11b covers the through hole 3a of the weep hole pipe 6 and the rehabilitation pipe 3.

主弁座部材１２は円筒形状をなし、弁筐１１の奥端部（水路５の反対側の端部）に装着されている。具体的には、主弁座部材１２の外周には環状の係止凸部１２ａが形成されており、この係止凸部１２ａが弁筐１１の内周に形成された環状の係止段差１１ｃに係止されている。弁筐１１の内周には雌ねじ１１ｄが形成されており、この雌ねじ１１ｄに螺合された弁座押さえ１３が上記主弁座部材１２の係止凸部１２ａを押し付けることにより、主弁座部材１２が弁筐１１に組み付けられている。 The main valve seat member 12 has a cylindrical shape and is attached to the inner end portion (the end portion on the opposite side of the water channel 5) of the valve housing 11. Specifically, an annular locking convex portion 12a is formed on the outer periphery of the main valve seat member 12, and the annular locking step 11c formed on the inner circumference of the valve housing 11 by the locking convex portion 12a. Is locked in. A female screw 11d is formed on the inner circumference of the valve housing 11, and the valve seat retainer 13 screwed into the female screw 11d presses the locking convex portion 12a of the main valve seat member 12 to press the main valve seat member 12. 12 is assembled to the valve housing 11.

主弁座部材１２には、主逆止弁８の環状の主弁座１２ｘが形成されている。主弁座１２ｘは水路５側を向き傾斜するとともに凹曲面をなしている。
主弁座部材１２は、流路１０ａの中央に位置する中央支持部１２ｂを有し、この中央支持部１２ｂは、放射状に延びる複数の架橋部１２ｃにより主弁座部材１２の内周と連なっている。 The main valve seat member 12 is formed with an annular main valve seat 12x of the main check valve 8. The main valve seat 12x is inclined toward the water channel 5 side and has a concave curved surface.
The main valve seat member 12 has a central support portion 12b located at the center of the flow path 10a, and the central support portion 12b is connected to the inner circumference of the main valve seat member 12 by a plurality of cross-linking portions 12c extending radially. There is.

副弁座部材１４は、更生管３の内周と略一致する位置に配置され、弁ボデイ１０の開口端部を構成している。副弁座部材１４は、その外周に形成された雄ねじ１４ａが弁筐１１の雌ねじ１１ｄに螺合することにより、弁筐１１に取り付けられている。 The auxiliary valve seat member 14 is arranged at a position substantially coincide with the inner circumference of the rehabilitation pipe 3 and constitutes the open end portion of the valve body 10. The auxiliary valve seat member 14 is attached to the valve housing 11 by screwing the male screw 14a formed on the outer periphery thereof into the female screw 11d of the valve housing 11.

副弁座部材１４は、その先端面から後退した位置に円環部１４ｂと流路１０ａの中心に位置する中央支持部１４ｃと、この円環部１４ｂと中央支持部１４ｃとを連ねる放射状に延びた複数の架橋部１４ｄとを有している。円環部１４ｂと架橋部１４ｄの水路５を向く面が、副逆止弁９の副弁座１４ｘとして提供される。副弁座１４ｘは、平坦面からなり弁ボデイ１０の中心軸線に直交している。 The auxiliary valve seat member 14 extends radially so as to connect the annular portion 14b and the central support portion 14c located at the center of the flow path 10a at a position retracted from the tip surface thereof, and the annular portion 14b and the central support portion 14c. It also has a plurality of cross-linked portions 14d. The surfaces of the annular portion 14b and the cross-linking portion 14d facing the water channel 5 are provided as the secondary check valve seat 14x of the secondary check valve 9. The auxiliary valve seat 14x is formed of a flat surface and is orthogonal to the central axis of the valve body 10.

上記主弁座部材１２の中央支持部１２ｂには、主逆止弁８の主弁体２０と、ゴムからなる付勢部材２１と、ワッシャ２２が、この順序で水路５に向かって支持されている。具体的には、中央支持部１２ｂと、主弁体２０と、付勢部材２１と、ワッシャ２２の中央をボルト２５が貫通しており、このボルト２５の先端部にナット２６が螺合されている。これらボルト２５とナット２６の締め付けにより、付勢部材２１は若干弾性変形している。 On the central support portion 12b of the main valve seat member 12, the main valve body 20 of the main check valve 8, the urging member 21 made of rubber, and the washer 22 are supported toward the water channel 5 in this order. There is. Specifically, the bolt 25 penetrates the center of the central support portion 12b, the main valve body 20, the urging member 21, and the washer 22, and the nut 26 is screwed into the tip portion of the bolt 25. There is. By tightening the bolt 25 and the nut 26, the urging member 21 is slightly elastically deformed.

主弁体２０は奥に向かって凸の球殻形状をなしており、付勢部材２１の弾性力により、その周縁部が上記主弁座１２ｘに着座している。この状態で、主弁体２０の中央部が主弁座部材１２の中央支持部１２ｂに当たっている。 The main valve body 20 has a spherical shell shape that is convex toward the back, and the peripheral portion thereof is seated on the main valve seat 12x due to the elastic force of the urging member 21. In this state, the central portion of the main valve body 20 is in contact with the central support portion 12b of the main valve seat member 12.

上記副弁座部材１４の中央支持部１４ｃには、副逆止弁９の副弁体３０が支持されている。副弁体３０は、ゴム製（例えばシリコンゴム製）で円形の板形状をなし、その中央部には凸部３０ａが形成されている。この凸部３０ａが中央支持部１４ｂの穴を貫通し、その突出端部が樹脂製またはゴム製の固定板３１に接着または溶着されることにより、副弁座部材１４の中央が、中央支持部１４ｃに固定されている。副弁体３０は副弁座１４ｘに実質的に接した状態を維持するのに十分な形状保持性を有している。副弁体３０は、副弁座部材１４の内周と副弁座１４ｘとで画成された浅い凹部１４ｅに収容されている。 The sub-valve body 30 of the sub-check valve 9 is supported by the central support portion 14c of the sub-valve seat member 14. The auxiliary valve body 30 is made of rubber (for example, made of silicon rubber) and has a circular plate shape, and a convex portion 30a is formed in the central portion thereof. The convex portion 30a penetrates the hole of the central support portion 14b, and the protruding end portion thereof is adhered or welded to the fixing plate 31 made of resin or rubber, so that the center of the auxiliary valve seat member 14 becomes the central support portion. It is fixed at 14c. The sub-valve body 30 has sufficient shape retention to maintain a state in which it is substantially in contact with the sub-valve seat 14x. The sub-valve body 30 is housed in a shallow recess 14e defined by the inner circumference of the sub-valve seat member 14 and the sub-valve seat 14x.

上記構成において、逆止弁装置７にいずれの方向からも流体圧が付与されない状態では、図１（Ａ）に示すように、主逆止弁８の主弁体２０が主弁座１２ｘに着座しており、副逆止弁９の副弁体３０が副弁座１４ｘに着座している。 In the above configuration, when fluid pressure is not applied to the check valve device 7 from any direction, the main valve body 20 of the main check valve 8 is seated on the main valve seat 12x as shown in FIG. 1 (A). The sub-valve body 30 of the sub-check valve 9 is seated on the sub-valve seat 14x.

地中構造体１の外からの水圧が上昇して、外水がウイープホール６ａに流入した時には、この外水の圧力で図１（Ｂ）に示すように主弁体２０が弁座１２ｘから離れ、副弁体３０も弾性変形して副弁座１４ｘから離れるので、上記外水は逆止弁装置７を通って水路５へ放出することができる。その結果、高圧の外水が既設管２を圧迫したり、既設管２のヒビ割れを通って裏打ち材４や更生管３を圧迫しなので、地中構造体１の変形や、既設管２、裏打ち材４、更生管３間の剥離を防ぐことができる。 When the water pressure from the outside of the underground structure 1 rises and the outside water flows into the weep hole 6a, the pressure of the outside water causes the main valve body 20 to separate from the valve seat 12x as shown in FIG. 1 (B). Since the sub-valve body 30 is also elastically deformed and separated from the sub-valve seat 14x, the outside water can be discharged to the water channel 5 through the check valve device 7. As a result, the high-pressure outside water presses the existing pipe 2, or the backing material 4 and the rehabilitation pipe 3 are pressed through the cracks of the existing pipe 2, so that the underground structure 1 is deformed and the existing pipe 2 It is possible to prevent peeling between the backing material 4 and the rehabilitation pipe 3.

上記とは逆に水路５内の圧が上昇した時には、図１（Ａ）に示すように、副弁体３０が副弁座１４ｘに押し付けられ、副逆止弁９の閉じ状態を維持される。また、主逆止弁８の閉じ状態も維持される。その結果、水路５内の下水等が既設管２の外に漏れるのを禁じることができる。 Contrary to the above, when the pressure in the water channel 5 rises, as shown in FIG. 1A, the sub-valve body 30 is pressed against the sub-valve seat 14x, and the closed state of the sub-check valve 9 is maintained. .. Further, the closed state of the main check valve 8 is also maintained. As a result, it is possible to prevent the sewage in the water channel 5 from leaking to the outside of the existing pipe 2.

外水流入時を除き、上記副弁体３０が閉じられていて主弁体２０の動作領域に水路５内の水が入り込まないので、水路５内の水に混入している砂や塵埃等の異物が主弁体２０の動作領域に運ばれて堆積することがない。その結果、主逆止弁８の正常な動作を長期にわたって維持することができる。 Except when the outside water flows in, the sub-valve body 30 is closed and the water in the water channel 5 does not enter the operating region of the main valve body 20, so that sand, dust, etc. mixed in the water in the water channel 5 Foreign matter is not carried to the operating region of the main valve body 20 and accumulated. As a result, the normal operation of the main check valve 8 can be maintained for a long period of time.

副弁体３０は、弁ボデイ１０において水路５に臨む開口端部に設置されているので、副弁体３０の動作領域に異物が堆積するのを抑制ないしは回避することができる。
副弁体３０は、弁ボデイ１０の浅い凹部１４ｅに収容されているので、水路５の流れの影響を受けずに副弁座１４ｘへの着座状態を安定して維持できる。また、副弁体３０が水路５の円滑な流れを乱すこともない。 Since the auxiliary valve body 30 is installed at the open end portion of the valve body 10 facing the water channel 5, it is possible to suppress or avoid the accumulation of foreign matter in the operating region of the auxiliary valve body 30.
Since the sub-valve body 30 is housed in the shallow recess 14e of the valve body 10, the seated state on the sub-valve seat 14x can be stably maintained without being affected by the flow of the water channel 5. Further, the auxiliary valve body 30 does not disturb the smooth flow of the water channel 5.

次に、本発明の他の実施形態について図面を参照しながら説明する。これら実施形態において先行する実施形態に対応する構成については、同番号または類似番号を付してその詳細な説明を省略する。 Next, other embodiments of the present invention will be described with reference to the drawings. The configurations corresponding to the preceding embodiments in these embodiments are designated by the same number or similar numbers, and detailed description thereof will be omitted.

［第２実施形態］
図２に示す第２実施形態の逆止弁装置７Ａの基本構成は第１実施形態の逆止弁装置７と同じであるが、主逆止弁８Ａ、副逆止弁９Ａ、弁ボデイ１０Ａの構造が異なる。
本実施形態では、弁筐１１に螺合される副弁座部材１４Ａが、主弁座部材１２の押さえを兼ねている。主弁座部材１２の主弁座１２ｘは逆止弁装置７Ａの中心軸線と直交した平坦な面となっている。主逆止弁８Ａの主弁体２０Ａは円形の平板状をなしている。付勢部材２１は中央支持部１２ｂの奥側に配置されている。副逆止弁９Ａの副弁体３０Ａは、中央が厚肉をなして副弁座部材１４Ａの中央支持部１４ｃに固定されている。 [Second Embodiment]
The basic configuration of the check valve device 7A of the second embodiment shown in FIG. 2 is the same as that of the check valve device 7 of the first embodiment, but the main check valve 8A, the sub check valve 9A, and the valve body 10A. The structure is different.
In the present embodiment, the sub valve seat member 14A screwed into the valve housing 11 also serves as a presser for the main valve seat member 12. The main valve seat 12x of the main valve seat member 12 has a flat surface orthogonal to the central axis of the check valve device 7A. The main valve body 20A of the main check valve 8A has a circular flat plate shape. The urging member 21 is arranged on the back side of the central support portion 12b. The sub-valve body 30A of the sub-check valve 9A has a thick center and is fixed to the central support portion 14c of the sub-valve seat member 14A.

上記逆止弁装置７Ａでは、外水圧が上昇すると、図２（Ｂ）に示すように、主弁体２０Ａが付勢部材２１の圧縮を伴って主弁座１２ｘから離れ、副弁体３０Ａの周辺部が弾性変形して副弁座１４ｘから離れ、これにより外水が水路５に放出される。 In the check valve device 7A, when the external water pressure rises, as shown in FIG. 2B, the main valve body 20A separates from the main valve seat 12x with the compression of the urging member 21, and the sub-valve body 30A The peripheral portion is elastically deformed and separated from the sub-valve seat 14x, whereby the outside water is discharged into the water channel 5.

主逆止弁としては第１，第２実施形態に制約されずあらゆるタイプの逆止弁を採用することができる。以下に説明する第３〜第８実施形態では、上記主逆止弁８，８Ａのいずれかを組み込んでいる。 As the main check valve, any type of check valve can be adopted without being restricted by the first and second embodiments. In the third to eighth embodiments described below, any of the main check valves 8 and 8A is incorporated.

［第３実施形態］
図３に示す第３実施形態の逆止弁装置７Ｂでは、副逆止弁９Ｂの副弁体３０Ｂが板バネからなる。副弁体３０Ｂの一端（水路５の上流側の端）が副弁座部材１４に固定され、他端（水路５の下流側の端）が自由端となっている。副弁体３０Ｂは、通常は副弁座１４ｘに接しており、外水圧により想像線で示すように弾性変形して副弁座１４ｘから離れ、外水の水路５への放水を可能にする。副弁体３０Ｂは上流側の端が固定されているので、開いた時に水路５の水が流入するのを防止できる。 [Third Embodiment]
In the check valve device 7B of the third embodiment shown in FIG. 3, the sub-valve body 30B of the sub-check valve 9B is made of a leaf spring. One end (upstream end of the water channel 5) of the auxiliary valve body 30B is fixed to the auxiliary valve seat member 14, and the other end (downstream end of the water channel 5) is a free end. The sub-valve body 30B is normally in contact with the sub-valve seat 14x, and is elastically deformed by the external water pressure as shown by an imaginary line to separate from the sub-valve seat 14x and enable the discharge of external water to the water channel 5. Since the end of the auxiliary valve body 30B on the upstream side is fixed, it is possible to prevent the water in the water channel 5 from flowing in when the auxiliary valve body 30B is opened.

［第４実施形態］
図４に示す第４実施形態の逆止弁装置７Ｃでは、副逆止弁９Ｃの副弁体３０Ｃが剛性の板からなる。副弁体３０Ｃの一端（水路５の上流側の端）が副弁座部材１４に回動可能に支持され、他端（水路５の下流側の端）が自由端となっている。副弁座部材１４には、副弁体３０Ｃの回動を規制するストッパ部１４ｓが形成されている。
副弁体３０Ｃは外水圧により想像線で示すように回動して副弁座１４ｘから離れ、外水の水路５への放水を可能にする。副弁体３０Ｃは上流側の端が回動可能に支持されているので、開いた時に水路５の水が流入するのを防止できる。 [Fourth Embodiment]
In the check valve device 7C of the fourth embodiment shown in FIG. 4, the sub-valve body 30C of the sub-check valve 9C is made of a rigid plate. One end (the end on the upstream side of the water channel 5) of the auxiliary valve body 30C is rotatably supported by the auxiliary valve seat member 14, and the other end (the end on the downstream side of the water channel 5) is a free end. The auxiliary valve seat member 14 is formed with a stopper portion 14s that regulates the rotation of the auxiliary valve body 30C.
The sub-valve body 30C rotates as shown by an imaginary line due to the external water pressure and separates from the sub-valve seat 14x to enable discharge of external water to the water channel 5. Since the end of the auxiliary valve body 30C on the upstream side is rotatably supported, it is possible to prevent the water in the water channel 5 from flowing in when the auxiliary valve body 30C is opened.

［第５実施形態］
図５に示す第５実施形態の逆止弁装置７Ｄでは、副逆止弁９Ｄの副弁体３０Ｄが剛性の板からなる。副弁体３０Ｄは中央に支軸３５を有し、この支軸３５が副弁座部材１４Ａの中央支持部１４ｃを貫通することにより、副弁座部材１４Ａに軸方向移動可能に支持されている。支軸３５には、副弁体３０Ｄを副弁座１４ｘ方向に付勢するゴム製の付勢部材３６が取り付けられている。 [Fifth Embodiment]
In the check valve device 7D of the fifth embodiment shown in FIG. 5, the sub-valve body 30D of the sub-check valve 9D is made of a rigid plate. The sub-valve body 30D has a support shaft 35 in the center, and the support shaft 35 is supported by the sub-valve seat member 14A so as to be movable in the axial direction by penetrating the central support portion 14c of the sub-valve seat member 14A. .. A rubber urging member 36 that urges the sub-valve body 30D in the sub-valve seat 14x direction is attached to the support shaft 35.

副弁座１４ｘは副弁座部材１４Ａの先端面から後退しており、これにより浅い凹部１４ｅが形成されている。副弁体３０Ｄはこの凹部１４ｅに収容されている。
副弁体３０Ｄは外水圧により想像線で示すように軸方向移動して副弁座１４ｘから離れ、外水の水路５への放水を可能にする。 The sub-valve seat 14x is retracted from the tip surface of the sub-valve seat member 14A, whereby a shallow recess 14e is formed. The auxiliary valve body 30D is housed in the recess 14e.
The auxiliary valve body 30D moves in the axial direction as shown by an imaginary line due to the external water pressure and separates from the auxiliary valve seat 14x, enabling the discharge of external water to the water channel 5.

［第６実施形態］
図６に示す第６実施形態の逆止弁装置７Ｅでは、第１〜第５実施形態の副逆止弁を備えていない。本実施形態では保護手段として扁平なフード４０を備えている。このフード４０は、弁ボデイ１０Ｅの開口（ウイープホール６ａの開口）を覆うようにして、水路５の上流側と両側で弁筐１１の先端面に固定され、下流側が開放されている。 [Sixth Embodiment]
The check valve device 7E of the sixth embodiment shown in FIG. 6 does not include the secondary check valve of the first to fifth embodiments. In this embodiment, a flat hood 40 is provided as a protective means. The hood 40 is fixed to the tip surface of the valve housing 11 on the upstream side and both sides of the water channel 5 so as to cover the opening of the valve body 10E (the opening of the weep hole 6a), and the downstream side is open.

外水圧が上昇して主逆止弁８Ａが開いた時には、フード４０の下流側の開放端４１から外水を水路５へ放出することができる。
フード４０の上流側と両側が塞がれているので、水路５内の水が弁ボデイ１０Ｅの開口に入ってくるのを抑制することができ、主逆止弁８Ａの動作領域に異物が入り込むのを抑制することができる。 When the outside water pressure rises and the main check valve 8A opens, the outside water can be discharged to the water channel 5 from the open end 41 on the downstream side of the hood 40.
Since the upstream side and both sides of the hood 40 are blocked, it is possible to prevent water in the water channel 5 from entering the opening of the valve body 10E, and foreign matter enters the operating region of the main check valve 8A. Can be suppressed.

［第７実施形態］
図７に示す第７実施形態の逆止弁装置７Ｆでは、弁ボデイ１０Ｆの弁座押さえ１３Ｆは、中央支持部１３ａと、中央支持部１３ａから放射状に延びて弁座押さえ１３Ｆの内周まで延びる架橋部１３ｂとを有している。これら中央支持部１３ａと架橋部１３ｂの水路５側の面にはフィルタ５０（保護手段）が配置されているフィルタ５０は弁ボデイ１０Ｆの先端面と面一をなしている。 [7th Embodiment]
In the check valve device 7F of the seventh embodiment shown in FIG. 7, the valve seat retainer 13F of the valve body 10F extends radially from the central support portion 13a and the central support portion 13a to the inner circumference of the valve seat retainer 13F. It has a cross-linked portion 13b. A filter 50 (protective means) is arranged on the surfaces of the central support portion 13a and the cross-linking portion 13b on the water channel 5 side, and the filter 50 is flush with the tip surface of the valve body 10F.

ボルト２５が、主弁座部材１２の中央支持部１２ｂ、主弁体２０、付勢部材２１、弁座押さえ１３Ｆの中央支持部１３ａ，フィルタ５０の中央部およびワッシャ５１を順に貫通しており、その先端部に螺合されたナット２６で締め付けることにより、フィルタ５０が固定されている。 The bolt 25 penetrates the central support portion 12b of the main valve seat member 12, the main valve body 20, the urging member 21, the central support portion 13a of the valve seat retainer 13F, the central portion of the filter 50, and the washer 51 in this order. The filter 50 is fixed by tightening with a nut 26 screwed to the tip portion thereof.

外水圧が上昇して主逆止弁８が開いた時には、外水をフィルタ５０から水路５へ放出することができる。フィルタ５０は、水路５を流れる水に混在している異物が主逆止弁８の主弁体２０の動作範囲に侵入するのを規制することができる。
本実施形態ではフィルタ５０としてパンチングメタルを用いたが、不織布等であってもよい。 When the outside water pressure rises and the main check valve 8 opens, the outside water can be discharged from the filter 50 to the water channel 5. The filter 50 can regulate foreign matter mixed in the water flowing through the water channel 5 from entering the operating range of the main valve body 20 of the main check valve 8.
In this embodiment, punching metal is used as the filter 50, but a non-woven fabric or the like may be used.

［第８実施形態］
図８に示す第８実施形態の逆止弁装置７Ｇでは、主逆止弁８Ａと弁ボデイ１０Ｅが図６に示す第６実施形態と同様の構成を有している。本実施形態では、主逆止弁８Ａの水路５側の面にシリコンゴム等の弾性材料からなる円柱形状の閉塞部材６０（保護手段）が取付られている。 [8th Embodiment]
In the check valve device 7G of the eighth embodiment shown in FIG. 8, the main check valve 8A and the valve body 10E have the same configuration as that of the sixth embodiment shown in FIG. In the present embodiment, a cylindrical closing member 60 (protective means) made of an elastic material such as silicon rubber is attached to the surface of the main check valve 8A on the water channel 5 side.

図８（Ａ）に示すように、上記閉塞部材６０の外周部は、弁ボデイ１０Ｅの弁座押さえ１３の内周に接しており、弁ボデイ１０Ｅの流路を塞いでいる。これにより、水路５を流れる水が主弁体２０Ａの動作領域に侵入するのを阻止し、この動作領域に異物が堆積するのを防止することができる。
外水圧が上昇した時には、図８（Ｂ）に示すように主逆止弁８Ａが開き、この外水圧により閉塞部材６０の外周部の少なくとも一部が径方向内方向に弾性変形する。その結果、閉塞部材６０の外周部と弁ボデイ１０Ｅの内周との間に形成された通路６１を介して、外水を水路５へ放出することができる。 As shown in FIG. 8A, the outer peripheral portion of the closing member 60 is in contact with the inner circumference of the valve seat retainer 13 of the valve body 10E, and blocks the flow path of the valve body 10E. As a result, it is possible to prevent the water flowing through the water channel 5 from entering the operating region of the main valve body 20A and prevent foreign matter from accumulating in this operating region.
When the external water pressure rises, the main check valve 8A opens as shown in FIG. 8B, and the external water pressure causes at least a part of the outer peripheral portion of the closing member 60 to elastically deform in the radial and inward directions. As a result, the outside water can be discharged to the water channel 5 through the passage 61 formed between the outer peripheral portion of the closing member 60 and the inner circumference of the valve body 10E.

［第９実施形態］
図９に示す第９実施形態の逆止弁装置７Ｈは、カップ形状の弁ボデイ７０と、この弁ボデイ７０内に収容された弾性材料からなる弁体７５とを備えている。弁ボデイ７０は、ウイープホール管６にねじ込まれる周壁７１と、ウイープホール管６の先端を覆う鍔部７２と、周壁７１の奥端に連なる底壁７３とを有しており、底壁７３には通口７３ａが形成されている。 [9th Embodiment]
The check valve device 7H of the ninth embodiment shown in FIG. 9 includes a cup-shaped valve body 70 and a valve body 75 made of an elastic material housed in the valve body 70. The valve body 70 has a peripheral wall 71 screwed into the weep hole pipe 6, a flange portion 72 covering the tip of the weep hole pipe 6, and a bottom wall 73 connected to the inner end of the peripheral wall 71, and is passed through the bottom wall 73. The mouth 73a is formed.

上記弁体７５は略円柱形状をなし、弁ボデイ７０の周壁７１と底部７３に固定されている。弁体７５の中央を含む部位（図９において破線の内側の部位）は、中心軸線を通る切断面により、周方向に複数に分割されている。これら分割部分７５ａの奥側の面（水路５と反対側の面）は、中央に向かって傾斜した受圧面７５ｘとして提供されており、これら受圧面７５ｘにより、円錐形状の凹部７６が形成されている。弁体７５の水路５側の面は弁ボデイ７０の中心軸線と直交する平坦面をなし、弁ボデイ７０の先端面と面一をなしている。 The valve body 75 has a substantially cylindrical shape and is fixed to the peripheral wall 71 and the bottom 73 of the valve body 70. The portion including the center of the valve body 75 (the portion inside the broken line in FIG. 9) is divided into a plurality of portions in the circumferential direction by a cut surface passing through the central axis. The inner surface (the surface opposite to the water channel 5) of these divided portions 75a is provided as a pressure receiving surface 75x inclined toward the center, and these pressure receiving surfaces 75x form a conical recess 76. There is. The surface of the valve body 75 on the water channel 5 side forms a flat surface orthogonal to the central axis of the valve body 70, and is flush with the tip surface of the valve body 70.

外水圧が上昇した時、この水圧が分割部分７５ａの受圧面７５ｘに付与され、これにより、図９（Ｂ）に示すように分割部分７５ａが径方向外方向に弾性変形し、その結果、弁体７５の中央に通路７７が形成され、外水の水路５への流れを許容する。
水路５の内圧が上昇した時には、この水圧が弁体７５の分割部分７５ａの水路５側の平坦面に付与されるが、分割部分７５ａを径方向に押し広げる力が生じないため、閉じ状態を維持され、水路５から外部への水の流出を禁じることができる。 When the external water pressure rises, this water pressure is applied to the pressure receiving surface 75x of the split portion 75a, which causes the split portion 75a to elastically deform in the radial and outward directions as shown in FIG. 9B, resulting in a valve. A passage 77 is formed in the center of the body 75 to allow the flow of outside water to the water channel 5.
When the internal pressure of the water channel 5 rises, this water pressure is applied to the flat surface of the split portion 75a of the valve body 75 on the water channel 5 side, but the force to expand the split portion 75a in the radial direction is not generated, so that the closed state is closed. It is maintained and can prevent the outflow of water from the channel 5.

上述したように弁体７５の分割部分７５ａは主として径方向に弾性変形し、その動作領域が弁体７５の内部にあるので、この動作領域に水路５からの異物が堆積することはなく、長期にわたって正常な動作を維持できる。 As described above, the divided portion 75a of the valve body 75 is elastically deformed mainly in the radial direction, and the operating region thereof is inside the valve body 75. Therefore, foreign matter from the water channel 5 does not accumulate in this operating region, and a long period of time Normal operation can be maintained throughout.

［第１０実施形態］
図１０に示す第１０実施形態の逆止弁装置７Ｊでは、第１実施形態と同じ弁ボデイ７０が用いられている。弁体８０は、弁ボデイ７０の底壁７３の水路５側の面に固定された環状板部８１と、この環状部８１の内周に連なり周方向に配置された複数の分割片８２（分割部分）とを有している。これら分割片８２は中心軸線を通る分割面により分割されている。これら分割片８２は水路５方向に向けて中心軸線に近づくように傾斜しており、この分割片８２の奥側の面が第１受圧面８２ｘとして提供され、水路５側の面が第２受圧面８２ｙとして提供される。 [10th Embodiment]
In the check valve device 7J of the tenth embodiment shown in FIG. 10, the same valve body 70 as that of the first embodiment is used. The valve body 80 includes an annular plate portion 81 fixed to the surface of the bottom wall 73 of the valve body 70 on the water channel 5 side, and a plurality of divided pieces 82 (divided) arranged in the circumferential direction along the inner circumference of the annular portion 81. Part) and. These division pieces 82 are divided by a division surface passing through the central axis. These divided pieces 82 are inclined so as to approach the central axis toward the water channel 5, and the surface on the back side of the divided pieces 82 is provided as the first pressure receiving surface 82x, and the surface on the water channel 5 side is the second pressure receiving surface. Provided as surface 82y.

外水圧が上昇した時、この水圧が弁体８０の分割片８２の第１受圧面８２ｘに付与され、これにより、分割片８２が径方向外方向に弾性変形して開き、外水の水路５への流れを許容する。
水路５の内圧が上昇した時には、この水圧が弁体８２の分割片８２の第２受圧面８２ｙに付与され、これにより分割片８２が径方向内方向に弾性変形して閉じ、水路５から外部への水の流出を禁じることができる。 When the outside water pressure rises, this water pressure is applied to the first pressure receiving surface 82x of the split piece 82 of the valve body 80, whereby the split piece 82 elastically deforms and opens in the radial and outward directions, and the water channel 5 of the outside water 5 Allow the flow to.
When the internal pressure of the water channel 5 rises, this water pressure is applied to the second pressure receiving surface 82y of the split piece 82 of the valve body 82, whereby the split piece 82 elastically deforms inward in the radial direction and closes, and is external from the water channel 5. The outflow of water to the water can be prohibited.

上述したように弁体８０の分割片８２は主として径方向に弾性変形するので、この動作領域に水路５からの異物が堆積することはなく、長期にわたって正常な動作を維持することができる。 As described above, since the split piece 82 of the valve body 80 is elastically deformed mainly in the radial direction, foreign matter from the water channel 5 does not accumulate in this operating region, and normal operation can be maintained for a long period of time.

本発明は、前記実施形態に限られず、その趣旨を逸脱しない範囲内で種々の改変をなすことができる。
ウイープホールは更生管と裏打ち材を貫通し、その外端が既設管の内周に位置していてもよい。この場合、更生管と裏打ち材により地中構造体が構成される。
ウイープホールは既設管と更生管と裏打ち材からなる地中構造体と異なるあらゆる地中構造体に形成されていてもよい。 The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
The weep hole may penetrate the rehabilitation pipe and the lining material, and its outer end may be located on the inner circumference of the existing pipe. In this case, the underground structure is composed of the rehabilitation pipe and the lining material.
The weep hole may be formed in any underground structure different from the underground structure composed of the existing pipe, the rehabilitation pipe and the lining material.

本発明は、水路を有する地中構造体のウイープホールに設置される逆止弁装置に適用可能である。 The present invention is applicable to a check valve device installed in a weep hole of an underground structure having a water channel.

１地中構造体
２既設管
３更生管
４裏打ち材
５水路
６ウイープホール管
６ａウイープホール
７，７Ａ，７Ｂ，７Ｃ，７Ｄ，７Ｅ，７Ｆ，７Ｇ，７Ｈ，７Ｊ逆止弁装置
８，８Ａ主逆止弁
９，９Ａ，９Ｂ，９Ｃ，９Ｄ副逆止弁（保護手段）
１０，１０Ａ，１０Ｅ，１０Ｆ弁ボデイ
１０ａ流路
１２ｘ主弁座
１４ｃ中央支持部
１４ｅ浅い凹部
１４ｘ副弁座
２０，２０Ａ主弁体
３０，３０Ａ，３０Ｂ，３０Ｃ，３０Ｄ副弁体
４０フード（保護手段）
５０フィルタ（保護手段）
６０閉塞部材（保護手段）
７０弁ボデイ
７５弁体
７５ａ分割部分
７５ｘ受圧面
８０弁体
８２分割片（分割部分）
８２ｘ受圧面 1 Underground structure 2 Existing pipe 3 Rehabilitation pipe 4 Backing material 5 Waterway 6 Weep hole pipe 6a Weep hole 7, 7A, 7B, 7C, 7D, 7E, 7F, 7G, 7H, 7J Check valve device 8, 8A Main check valve Valves 9, 9A, 9B, 9C, 9D Secondary check valve (protective means)
10, 10A, 10E, 10F Valve body 10a Flow path 12x Main valve seat 14c Central support 14e Shallow recess 14x Sub valve seat 20, 20A Main valve body 30, 30A, 30B, 30C, 30D Sub valve body 40 Hood (protective means) )
50 filters (protective measures)
60 Closing member (protective means)
70 Valve body 75 Valve body 75a Divided part 75 x Pressure receiving surface 80 Valve body 82 Divided piece (divided part)
82x pressure receiving surface

Claims

In a check valve device installed in a weep hole of an underground structure having a waterway
A valve body installed in the weep hole and having a flow path, a main valve seat formed in the valve body and facing the water channel side, and a main valve body in contact with and separated from the main valve seat, and the water channel A main check valve that allows the flow toward and prohibits the flow in the opposite direction,
A protective means that is arranged on the opening side of the weep hole from the operating region of the main valve body and regulates foreign matter from entering the operating region of the main valve body from the water channel while allowing the flow toward the water channel.
With
Wherein said protection means secondary check valve, the Fukugyaku check valve is disposed at the open end of the Uipuhoru, a sub valve seat facing the waterways, and toward and away from the sub-valve body to the sub valve seat A check valve device having a check valve device that allows a flow toward the water channel and prohibits a flow in the opposite direction.

The secondary check valve shares the valve body with the main check valve,
The valve body has a tubular shape and is arranged coaxially with the weep hole, and its open end faces the water channel at the inner circumference of the underground structure.
The check valve device according to claim 1 , wherein the sub-valve seat and the sub-valve body are arranged at an open end portion of the valve body.

The sub-valve seat is located at a position retracted from the tip surface of the valve body facing the water channel, and the sub-valve body is housed in the inner circumference of the opening end of the valve body and the shallow recess formed by the sub-valve seat. The check valve device according to claim 2 , wherein the check valve device is provided.

The valve body has a central support portion arranged in the center of the flow path, and the auxiliary valve seat is formed around the central support portion.
The sub-valve body is made of an elastic material, the central portion thereof is fixed to the central support portion, and the peripheral portion thereof is separated from the sub-valve seat by elastic deformation to allow a flow toward the water channel, and the peripheral portion is allowed. The check valve device according to claim 2 or 3 , wherein the portion is in contact with the sub-valve seat to prohibit the flow in the reverse direction.

Claim 2 or 3 is characterized in that the sub-valve body is made of a leaf spring, one end on the upstream side of the water channel is fixed to the valve body, and the other end on the downstream side of the water channel is a free end. The check valve device described in.

Said sub-valve element is upstream of the one end of the waterway is rotatably supported in the valve body, according to claim 2 or 3, characterized in that downstream of the other end of the waterway is a free end The check valve device described in.

The valve body has a central support portion arranged in the center of the flow path, and the auxiliary valve seat is formed around the central support portion.
The check valve device according to claim 2 or 3 , wherein the sub-valve body is movably supported by the central support portion in the axial direction of the valve body.

In a check valve device installed in a weep hole of an underground structure having a waterway
A valve body installed in the weep hole and having a flow path, a main valve seat formed in the valve body and facing the water channel side, and a main valve body in contact with and separated from the main valve seat, and the water channel A main check valve that allows the flow toward and prohibits the flow in the opposite direction,
A protective means that is arranged on the opening side of the weep hole from the operating region of the main valve body and regulates foreign matter from entering the operating region of the main valve body from the water channel while allowing the flow toward the water channel.
With
The protective means includes a flat hood that covers the opening of the weep hole, and the hood is a check valve device in which only the downstream side of the water channel is open.

In a check valve device installed in a weep hole of an underground structure having a waterway
A valve body installed in the weep hole and having a flow path, a main valve seat formed in the valve body and facing the water channel side, and a main valve body in contact with and separated from the main valve seat, and the water channel A main check valve that allows the flow toward and prohibits the flow in the opposite direction,
A protective means that is arranged on the opening side of the weep hole from the operating region of the main valve body and regulates foreign matter from entering the operating region of the main valve body from the water channel while allowing the flow toward the water channel.
With
The main valve body of the main check valve is movable in the axial direction of the weep hole, and a closing member made of an elastic material is attached to the waterway side surface of the main valve body as the protective means. By contacting the inner circumference of the valve body, the closing member closes the flow path at least in the operating region of the main valve body.
When the main valve body is separated from the main valve seat, at least a part of the outer peripheral portion of the closing member is elastically deformed in the radial inward direction due to the pressure of water toward the water channel from the inner circumference of the valve body. A check valve device that is separated and allows the flow of water into the water channel.