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JP6910793B2 - Pressure control valve - Google Patents
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JP6910793B2 - Pressure control valve - Google Patents

Pressure control valve Download PDF

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JP6910793B2
JP6910793B2 JP2016241395A JP2016241395A JP6910793B2 JP 6910793 B2 JP6910793 B2 JP 6910793B2 JP 2016241395 A JP2016241395 A JP 2016241395A JP 2016241395 A JP2016241395 A JP 2016241395A JP 6910793 B2 JP6910793 B2 JP 6910793B2
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elastic sheet
pressing
pressure
end opening
discharge port
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JP2018096110A (en
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田中 浩一
浩一 田中
友子 平賀
友子 平賀
良司 笠木
良司 笠木
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THE HIRAGA CORPORATION
Obayashi Corp
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Description

本発明は、主としてモルタルの充填時、特にせん断補強具が挿入された挿入穴への充填時に適用される圧力制御弁に関する。 The present invention relates mainly to a pressure control valve applied when filling mortar, particularly when filling an insertion hole into which a shear reinforcement is inserted.

鉄筋コンクリート構造物を構築するにあたっては、該構造物を構成する壁等に作用する面外せん断力を支持すべく、せん断補強筋を配置する場合があるが、耐震基準の見直し等によってより高いせん断耐力やせん断強さが望まれる場合には、既存の鉄筋コンクリート構造物に対してせん断補強が別途必要になる。 When constructing a reinforced concrete structure, shear reinforcements may be placed to support the out-of-plane shear force acting on the walls and the like that make up the structure, but higher shear strength is achieved by reviewing seismic standards. If shear strength is desired, shear reinforcement is required separately for existing reinforced concrete structures.

このようなせん断補強を行う手段として、「マルチプルナットバー」(登録商標)と呼ばれるせん断補強具を用いた耐震補強工法が知られている。 As a means for performing such shear reinforcement, a seismic retrofitting method using a shear reinforcement tool called "multiple nut bar" (registered trademark) is known.

かかるせん断補強具は、PC鋼棒とその両端近傍に取り付けられる円板状あるいはナット状の定着部材とで構成してあり、例えばボックスカルバートの側壁に設置する場合であれば、該側壁に挿入穴を水平に穿孔形成した後、その挿入穴にモルタルを充填し、しかる後、該モルタルに埋設する形でせん断補強具を挿入する。 Such a shear reinforcing tool is composed of a PC steel rod and a disk-shaped or nut-shaped fixing member attached in the vicinity of both ends thereof. After forming a horizontal hole, the insertion hole is filled with mortar, and then a shear reinforcing tool is inserted by embedding in the mortar.

このようにすると、モルタルが固化した後は、該モルタルとその周囲のコンクリート躯体とが一体化するため、挿入されたせん断補強具は、上述の例であれば、ボックスカルバートの側壁に作用する面外せん断力を支持し、あるいは該面外せん断力に抵抗する機能を発揮する。 In this way, after the mortar has solidified, the mortar and the concrete skeleton around it are integrated, so that the inserted shear reinforcement is the surface that acts on the side wall of the box culvert in the above example. It exerts a function of supporting the outer shear force or resisting the out-of-plane shear force.

一方、耐震補強すべき部位が、ボックスカルバートの頂板のように施工側から見て上方に位置する場合においては、その上方部位に上向きの挿入穴を穿孔形成し、次いで、その挿入穴にせん断補強具を挿入して仮固定するとともに、ホースやパイプ等からなる中空のエア抜き部材を、その上端が挿入穴の最上部直下に位置するように挿入穴に配置するとともに、該エア抜き部材が挿通される形で挿入穴の下端開口を底型枠で塞ぐ。 On the other hand, when the part to be seismically reinforced is located above the top plate of the box formwork when viewed from the construction side, an upward insertion hole is formed in the upper part, and then shear reinforcement is performed in the insertion hole. A hollow air bleeding member made of a hose, a pipe, etc. is placed in the insertion hole so that the upper end thereof is located directly below the uppermost part of the insertion hole, and the air bleeding member is inserted. Close the lower end opening of the insertion hole with the bottom formwork.

次に、底型枠に設けられた注入口を介してモルタルを上方に向けて注入するが、エア抜き部材からモルタルが流出してきたならば、それによって挿入穴への充填が完了したと確認できるので、この時点でモルタルの注入を終了する。 Next, the mortar is injected upward through the injection port provided in the bottom formwork, but if the mortar flows out from the air bleeding member, it can be confirmed that the filling of the insertion hole is completed. Therefore, the injection of mortar is finished at this point.

特開2010―185247号公報Japanese Unexamined Patent Publication No. 2010-185247 特開2014―114552号公報Japanese Unexamined Patent Publication No. 2014-114552 特開2015―028266号公報Japanese Unexamined Patent Publication No. 2015-028266

エア抜き部材は、挿入穴の上部に空気を残さないようにするという点で、モルタル注入時に必要不可欠なものではあるが、これを残置したままモルタルを固化させると、せん断補強具がその機能を十分に発揮できないおそれがある。 The air bleeding member is indispensable when injecting mortar in that it does not leave air above the insertion hole, but if the mortar is solidified while leaving it, the shear reinforcement will function. It may not be fully exerted.

そのため、モルタルが固化する前に、エア抜き部材を挿入穴から引抜き撤去せねばならないが、エア抜き部材を引き抜く際には、撤去に伴う体積減少分が空隙として挿入穴に残ることがないよう、加圧ポンプによるモルタルの加圧注入を継続し、エア抜き部材の撤去後は、これが挿通されていた底型枠のエア抜き口を速やかに塞いだ後、加圧ポンプを停止する必要がある。 Therefore, the air bleeding member must be pulled out from the insertion hole before the mortar solidifies, but when the air bleeding member is pulled out, the volume reduction due to the removal does not remain in the insertion hole as a gap. It is necessary to continue the pressure injection of the mortar by the pressure pump, and after removing the air bleeding member, promptly close the air bleeding port of the bottom form through which the mortar is inserted, and then stop the pressure pump.

ここで、エア抜き口を塞ぐ操作と加圧ポンプの停止操作のタイミングを合わせることは難しく、塞ぎ操作が遅れると、該エア抜き口を介して挿入穴からモルタルが流出して該挿入穴に空隙が形成され、加圧ポンプの停止操作が遅れると、モルタルの圧力が急激に上昇して加圧ポンプやそれに接続された配管類を破損させる事態を招く。 Here, it is difficult to match the timing of the operation of closing the air bleeding port and the operation of stopping the pressure pump, and if the closing operation is delayed, the mortar flows out from the insertion hole through the air bleeding port and a gap is formed in the insertion hole. If the pressure of the pressurizing pump is delayed and the pressure of the mortar rises sharply, the pressurizing pump and the piping connected to the pressurizing pump may be damaged.

そこで、本出願人は、加圧ポンプと底型枠の注入口とを連通接続する注入用部材内でモルタルの圧力が設定値を上回ったとき、該モルタルをリリーフ弁によって注入用部材の外側に排出するグラウト材充填システムを別途開発中である。 Therefore, when the pressure of the mortar exceeds the set value in the injection member that connects the pressurizing pump and the injection port of the bottom form, the applicant applies the mortar to the outside of the injection member by the relief valve. A separate grout filling system for discharging is under development.

しかしながら、リリーフ弁の内部空間をモルタルが通過する際、圧力変動等に起因した脱水現象によってモルタルに含まれていた砂がリリーフ弁内に堆積付着し、該砂が弁体と管路内面との間に入り込むなどして弁体の動きを阻害し、リリーフ弁が正常に作動しなくなるという問題や、これを防止しようとすると、リリーフ弁の分解清掃を頻繁に行わねばならないという問題を生じていた。 However, when the mortar passes through the internal space of the relief valve, the sand contained in the mortar accumulates and adheres to the relief valve due to the dehydration phenomenon caused by the pressure fluctuation and the like, and the sand adheres to the valve body and the inner surface of the pipeline. There was a problem that the relief valve did not operate normally due to obstruction of the movement of the valve body by getting in between, and in order to prevent this, there was a problem that the relief valve had to be disassembled and cleaned frequently. ..

本発明は、上述した事情を考慮してなされたもので、モルタル中の砂を原因とする作動不良の発生を防止可能な圧力制御弁を提供することを目的とする。 The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a pressure control valve capable of preventing the occurrence of malfunction due to sand in the mortar.

上記目的を達成するため、本発明に係る圧力制御弁は請求項1に記載したように、粒状体を含む流動物が圧送される配管に設けられた排出口の端部開口に一方の面が対向するように配置される不透水性の弾性シートと、該弾性シートの他方の面に一方の面が対向するように配置される押圧板及び該押圧板の他方の面に一端が連結又は当接されることで前記押圧板を介して前記弾性シートに押圧力を伝達可能な押圧バネが設けられた押圧機構とを備えてなり、前記排出口からの前記流動物の流出圧が予め定められた設定値以下のとき、前記弾性シートが前記押圧板を介して作用する前記押圧力で前記端部開口の周縁に押し付けられることにより、前記排出口からの前記流動物の流出が遮断されるとともに、前記流出圧が前記設定値を上回ったとき、該流出圧により、前記押圧板が押し戻されつつ、前記弾性シートが前記端部開口の周縁から離間することにより、該端部開口が全断面で開放されなおかつ前記弾性シートの面に沿って放射状に流れる形で前記排出口からの前記流動物の流出が許容されるようになっているものである。 In order to achieve the above object, as described in claim 1, the pressure control valve according to the present invention has one surface at the end opening of the discharge port provided in the pipe to which the fluid containing the granular material is pumped. An impermeable elastic sheet arranged so as to face each other, a pressing plate arranged so that one surface faces the other surface of the elastic sheet, and one end connected to or contacting the other surface of the pressing plate. It is provided with a pressing mechanism provided with a pressing spring capable of transmitting the pressing force to the elastic sheet via the pressing plate when in contact with the elastic sheet, and the outflow pressure of the fluid from the discharge port is predetermined. When the value is equal to or less than the set value, the elastic sheet is pressed against the peripheral edge of the end opening by the pressing force acting through the pressing plate, so that the outflow of the fluid from the discharge port is blocked. When the outflow pressure exceeds the set value, the elastic sheet is separated from the peripheral edge of the end opening while the pressing plate is pushed back by the outflow pressure, so that the end opening is opened in the entire cross section. The fluid is allowed to flow out from the discharge port in a form that is open and flows radially along the surface of the elastic sheet.

また、本発明に係る圧力制御弁は、前記流出圧が前記弾性シートの中央領域に作用するように該弾性シートを前記端部開口に対して配置することにより、前記弾性シートが前記端部開口の周縁から離間する際に該弾性シートがその中央領域を膨らませる形で弾性変形するように構成したものである。
また、本発明に係る圧力制御弁は請求項3に記載したように、粒状体を含む流動物が圧送される配管に設けられた排出口の端部開口に一方の面が対向するように配置される不透水性の弾性シートと、該弾性シートの他方の面に一方の面が対向するように配置される押圧板及び該押圧板の他方の面に一端が連結又は当接されることで前記押圧板を介して前記弾性シートに押圧力を伝達可能な押圧バネが設けられた押圧機構とを備えてなり、前記排出口からの前記流動物の流出圧が予め定められた設定値以下のとき、前記弾性シートが前記押圧板を介して作用する前記押圧力で前記端部開口の周縁に押し付けられることにより、前記排出口からの前記流動物の流出が遮断されるとともに、前記流出圧が前記設定値を上回ったとき、該流出圧により、前記押圧板が押し戻されつつ、前記弾性シートが前記端部開口の周縁から離間することにより、前記排出口からの前記流動物の流出が許容されるようになっている圧力制御弁であって、
ボックス状ケーシングの底部中央に設けられた雌ネジに螺合される雄ネジが形成された調整ロッド及び該調整ロッドが中央近傍から延びその反対側に前記押圧バネの他端が連結又は当接される調整板からなり前記調整ロッドの回動操作及びそれに伴う前記調整板の進退動作によって前記押圧バネの収縮状態を調整する押圧力調整機構と、前記排出口近傍に取り付けられ前記ボックス状ケーシングの開口縁部との間に前記弾性シートの周縁が狭着できるように構成された枠状保持部材とを備え、該枠状保持部材は、設置姿勢で下方となる位置に開き部位が形成されるように横断面を開断面としてあり、前記弾性シートが前記端部開口の周縁から離間した状態において該端部開口から流出した前記流動物が前記開き部位を介して外部に排出されるようになっているものである。
Further, in the pressure control valve according to the present invention, the elastic sheet is arranged with respect to the end opening so that the outflow pressure acts on the central region of the elastic sheet, so that the elastic sheet opens at the end. The elastic sheet is configured to be elastically deformed so as to inflate its central region when it is separated from the peripheral edge of the sheet.
Further, as described in claim 3, the pressure control valve according to the present invention is arranged so that one surface faces the end opening of the discharge port provided in the pipe to which the fluid containing the granular material is pressure-fed. By connecting or abutting one end to the impermeable elastic sheet to be formed, a pressing plate arranged so that one surface faces the other surface of the elastic sheet, and the other surface of the pressing plate. The elastic sheet is provided with a pressing mechanism provided with a pressing spring capable of transmitting the pressing force via the pressing plate, and the outflow pressure of the fluid from the discharge port is equal to or less than a predetermined set value. When the elastic sheet is pressed against the peripheral edge of the end opening by the pressing force acting through the pressing plate, the outflow of the fluid from the discharge port is blocked and the outflow pressure is reduced. When the set value is exceeded, the pressure plate is pushed back by the outflow pressure, and the elastic sheet is separated from the peripheral edge of the end opening, so that the outflow of the fluid from the discharge port is allowed. It is a pressure control valve that is designed to
An adjustment rod having a male screw screwed into a female screw provided in the center of the bottom of the box-shaped casing and the adjustment rod extending from the vicinity of the center, and the other end of the pressing spring is connected or abutted on the opposite side. A pressing pressure adjusting mechanism that adjusts the contraction state of the pressing spring by rotating the adjusting rod and moving the adjusting plate forward and backward, and an opening of the box-shaped casing attached near the discharge port. A frame-shaped holding member configured so that the peripheral edge of the elastic sheet can be narrowly fitted to the edge portion is provided, and the frame-shaped holding member is formed with an opening portion at a position lower in the installation posture. The cross section is an open cross section, and the fluid flowing out from the end opening is discharged to the outside through the opening portion in a state where the elastic sheet is separated from the peripheral edge of the end opening. Is what it is.

本発明に係る圧力制御弁においては、押圧バネによる押圧力が押圧板を介して弾性シートに伝達されるようになっており、配管内を流動物が流れる際、排出口からの流出圧が予め定められた設定値以下のときには、押圧板を介して作用する押圧力で、弾性シートが端部開口の周縁に押し付けられるため、排出口からの流動物の流出が遮断される。 In the pressure control valve according to the present invention, the pressing force by the pressing spring is transmitted to the elastic sheet via the pressing plate, and when the fluid flows through the pipe, the outflow pressure from the discharge port is preliminarily applied. When the value is equal to or less than the specified set value, the elastic sheet is pressed against the peripheral edge of the end opening by the pressing force acting through the pressing plate, so that the outflow of the fluid from the discharge port is blocked.

上述の設定値は、主として押圧バネによる押圧力で決定されるが、必要に応じて弾性シートの面内引張力が考慮される。 The above-mentioned set value is mainly determined by the pressing force of the pressing spring, but the in-plane tensile force of the elastic sheet is taken into consideration if necessary.

一方、流出圧が上述の設定値を上回ると、該流出圧によって押圧板が押し戻されるとともに、弾性シートが端部開口の周縁から離間するため、排出口からの流動物の流出が許容される。 On the other hand, when the outflow pressure exceeds the above-mentioned set value, the pressing plate is pushed back by the outflow pressure and the elastic sheet is separated from the peripheral edge of the end opening, so that the outflow of the fluid from the discharge port is allowed.

ここで、流出圧が設定値以下のときには、弾性シートが排出口の端部開口周縁に押し付けられることで、該端部開口近傍では液密状態となる。そのため、端部開口から水分が漏出して流動物が脱水されるといった事態が防止され、かくして排出口の端部開口近傍や弾性シートの一方の面への粒状体の堆積付着が抑制される(脱水防止作用)。 Here, when the outflow pressure is equal to or less than the set value, the elastic sheet is pressed against the peripheral edge of the end opening of the discharge port, so that the liquid-tight state is obtained in the vicinity of the end opening. Therefore, the situation where water leaks from the end opening and the fluid is dehydrated is prevented, and thus the deposition and adhesion of granules to the vicinity of the end opening of the discharge port and to one surface of the elastic sheet are suppressed ( Anti-dehydration effect).

一方、流出圧が設定値を上回ったときは、弾性シートが排出口の端部開口の周縁から離間して両者の間にスペースが生じ、この離間スペースを介して流動物が排出口から流出するが、その際の流出は、端部開口が全断面で開放されなおかつ弾性シートの面に沿って放射状に流れる形となるため、排出口の端部開口近傍や弾性シートの一方の面には粒状体が本来的に堆積付着しにくく、また遮断状態の間に粒状体がそれらの箇所に堆積付着していたとしても、該粒状体は、弾性シートの離間に伴う流動物の排出流によって速やかに洗い流される(洗浄作用)。 On the other hand, when the outflow pressure exceeds the set value, the elastic sheet is separated from the peripheral edge of the end opening of the discharge port to create a space between the two, and the fluid flows out from the discharge port through this separation space. However, the outflow at that time is such that the end opening is opened in the entire cross section and flows radially along the surface of the elastic sheet, so that the outflow is granular in the vicinity of the end opening of the discharge port or on one surface of the elastic sheet. Even if the body is inherently difficult to deposit and adhere to, and even if the granules are deposited and adhered to those parts during the blocking state, the granules are rapidly deposited by the discharge flow of the fluid accompanying the separation of the elastic sheet. It is washed away (cleaning action).

また、押圧機構は、弾性シートを挟んで排出口と反対の側に配置されるが、該弾性シートを不透水性の弾性シートで構成してあるため、排出口から流出した流動物が押圧機構に浸入して該押圧機構に粒状体が堆積付着するおそれがなくなり、かくして押圧機構の保守点検の負担を大幅に軽減することができる(隔離作用)。 Further, the pressing mechanism is arranged on the side opposite to the discharge port with the elastic sheet sandwiched between them. However, since the elastic sheet is composed of an impermeable elastic sheet, the fluid flowing out from the discharge port is pressed by the pressing mechanism. There is no possibility that granules will be deposited and adhered to the pressing mechanism by infiltrating into the pressing mechanism, and thus the burden of maintenance and inspection of the pressing mechanism can be significantly reduced (isolation action).

本発明の圧力制御弁は、鉄筋コンクリート構造物に穿孔された挿入穴にグラウト材を充填する際、加圧ポンプと挿入穴側の注入口とを連通接続する配管に設ける形の適用が典型例となるが、本発明はこのような適用例に限定されるものではなく、粒状体を含む流動物を圧送する際、配管、加圧ポンプといった圧送設備あるいは圧送機器が、急激な圧力上昇によって破損するのを防止する必要がある全てのケースに適用できるものであって、例えば連続地中壁やシールドトンネルを構築する際の掘削泥水を圧送する場合や浚渫土を圧送する場合にも適用可能である。 As a typical example, the pressure control valve of the present invention is provided in a pipe that connects a pressure pump and an injection port on the insertion hole side when filling an insertion hole drilled in a reinforced concrete structure with a grout material. However, the present invention is not limited to such an application example, and when a fluid containing granules is pumped, a pumping facility such as a pipe or a pressure pump or a pumping device is damaged by a sudden pressure rise. It can be applied to all cases where it is necessary to prevent the above, for example, when pumping excavated muddy water when constructing a continuous underground wall or shield tunnel, or when pumping dredged soil. ..

流動物とそれに含まれる粒状体は、主としてモルタルとそれに含まれる細骨材(砂)が該当するが、浚渫土や掘削泥水といったスラリーとそれに含まれる砂分も包摂される。 The fluid and the granules contained therein mainly correspond to mortar and the fine aggregate (sand) contained therein, but slurries such as dredged soil and drilling fluid and the sand contained therein are also included.

弾性シートは、その一方の面が排出口の端部開口に、他方の面が押圧板にそれぞれ対向するように配置されるとともに、流出圧が設定値以下のときには、押圧板によって端部開口の周縁に押し付けられ、流出圧が設定値を上回ったときには、押圧板を押し戻す形で端部開口の周縁から離間するように構成される限り、その配置形態は任意である。 The elastic sheet is arranged so that one surface of the elastic sheet faces the end opening of the discharge port and the other surface faces the pressing plate, and when the outflow pressure is equal to or less than the set value, the end opening is opened by the pressing plate. When the pressure plate is pressed against the peripheral edge and the outflow pressure exceeds the set value, the arrangement form is arbitrary as long as the pressing plate is configured to be separated from the peripheral edge of the end opening by pushing back.

ここで、上述した圧力制御弁に、ボックス状ケーシングの底部中央に設けられた雌ネジに螺合される雄ネジが形成された調整ロッド及び該調整ロッドが中央近傍から延びその反対側に押圧バネの他端が連結又は当接される調整板からなり調整ロッドの回動操作及びそれに伴う調整板の進退動作によって押圧バネの収縮状態を調整する押圧力調整機構と、排出口近傍に取り付けられボックス状ケーシングの開口縁部との間に弾性シートの周縁が狭着できるように構成された枠状保持部材とを別途備えるとともに、該枠状保持部材を、設置姿勢で下方となる位置に開き部位が形成されるように横断面を開断面とすることで、弾性シートが端部開口の周縁から離間した状態では、端部開口から流出した流動物が上述した開き部位を介して外部に排出されるように構成することができる。 Here, the pressure control valve described above has an adjusting rod in which a male screw screwed into a female screw provided in the center of the bottom of the box-shaped casing is formed, and the adjusting rod extends from the vicinity of the center and presses a spring on the opposite side. A push pressure adjustment mechanism that adjusts the contraction state of the pressing spring by rotating the adjusting rod and moving the adjusting plate forward and backward, and a box attached near the discharge port. A frame-shaped holding member configured so that the peripheral edge of the elastic sheet can be narrowly fitted to the opening edge of the shaped casing is separately provided, and the frame-shaped holding member is opened at a position lower in the installation posture. By making the cross section an open cross section so that Can be configured to

かかる構成によれば、調整ロッドの回動操作及びそれに伴う調整板の進退動作によって押圧バネの収縮状態を調整することができるため、押圧バネによる押圧力を可変に設定することが可能となる。 According to such a configuration, the contracted state of the pressing spring can be adjusted by the rotating operation of the adjusting rod and the accompanying advance / retreat operation of the adjusting plate, so that the pressing force by the pressing spring can be set variably.

また、弾性シートの周縁が枠状保持部材とボックス状ケーシングの開口縁部との間に狭着されるため、弾性シートの中央近傍が面外方向に自由に撓むことが可能となり、かくして上述した弾性シートの弾性挙動が確実に発揮されるとともに、流動物が押圧機構に飛散するのをボックス状ケーシングで防止することができるため、上述した隔離作用がより確実になり、押圧機構の保守点検がほぼ不要になる。 Further, since the peripheral edge of the elastic sheet is narrowly fitted between the frame-shaped holding member and the opening edge of the box-shaped casing, the vicinity of the center of the elastic sheet can be freely bent in the out-of-plane direction, thus described above. The elastic behavior of the elastic sheet is surely exhibited, and the box-shaped casing can prevent the fluid from scattering to the pressing mechanism. Therefore, the above-mentioned isolation action is more reliable, and maintenance and inspection of the pressing mechanism are performed. Is almost unnecessary.

本実施形態に係る圧力制御弁1の分解斜視図。An exploded perspective view of the pressure control valve 1 according to the present embodiment. 本実施形態に係る圧力制御弁1の縦断面図であり、(a)は分解図、(b)は組立が完了した全体図。It is a vertical cross-sectional view of the pressure control valve 1 according to this embodiment, (a) is an exploded view, and (b) is an overall view of completed assembly. 本実施形態に係る圧力制御弁1が適用されるグラウト材充填システムを示した概略図。The schematic diagram which showed the grout material filling system to which the pressure control valve 1 which concerns on this embodiment is applied. 本実施形態に係る圧力制御弁1の作用を示した説明図。The explanatory view which showed the operation of the pressure control valve 1 which concerns on this embodiment. 変形例に係る圧力制御弁の縦断面図。The vertical sectional view of the pressure control valve which concerns on a modification. 別の変形例に係る圧力制御弁61の縦断面図であり、(a)は分解図、(b)は組立が完了した全体図。It is a vertical cross-sectional view of the pressure control valve 61 according to another modification, (a) is an exploded view, and (b) is an overall view of the completed assembly. 変形例に係る圧力制御弁61の作用を示した説明図。The explanatory view which showed the operation of the pressure control valve 61 which concerns on the modification.

以下、本発明に係る圧力制御弁の実施の形態について、添付図面を参照して説明する。 Hereinafter, embodiments of the pressure control valve according to the present invention will be described with reference to the accompanying drawings.

図1は、本実施形態に係る圧力制御弁を示した分解斜視図、図2は同じく縦断面図である。これらの図に示すように、本実施形態に係る圧力制御弁1は、粒状体を含む流動物としてのモルタルが配管2内を圧送される際、該モルタルの圧力が予め定められた設定値を上回ったときに該モルタルを配管2に設けられた排出口3の端部開口4を介して外部に流出させるものであって、ボックス状ケーシング5、弾性シート6及び枠状保持部材7を、4本の連結ボルト8を用いて、端部開口4を取り囲むように設置された取付け部材9に取り付けて配置してある。 FIG. 1 is an exploded perspective view showing a pressure control valve according to the present embodiment, and FIG. 2 is a vertical cross-sectional view. As shown in these figures, the pressure control valve 1 according to the present embodiment sets a predetermined value for the pressure of the mortar when the mortar as a fluid containing granules is pumped into the pipe 2. When the mortar exceeds the limit, the mortar is discharged to the outside through the end opening 4 of the discharge port 3 provided in the pipe 2, and the box-shaped casing 5, the elastic sheet 6 and the frame-shaped holding member 7 are 4 The connecting bolt 8 of the book is used to attach and arrange the attachment member 9 installed so as to surround the end opening 4.

枠状保持部材7は、コの字部10の両端から湾曲部11,11をそれぞれ延設して該湾曲部の先端同士の間に開き部位である空きを形成することにより、全体の横断面が開断面となるように形成してあるとともに、ボックス状ケーシング5に形成された鍔状の開口縁部12との間に弾性シート6の周縁を湾曲部11,11にて狭着できるようになっている。 The frame-shaped holding member 7 has curved portions 11 and 11 extending from both ends of the U-shaped portion 10 to form a gap, which is an opening portion, between the tips of the curved portions, thereby forming an overall cross section. Is formed so as to have an open cross section, and the peripheral edge of the elastic sheet 6 can be narrowly fitted by the curved portions 11 and 11 with the flange-shaped opening edge portion 12 formed in the box-shaped casing 5. It has become.

弾性シート6は、不透水性を有する弾性素材で構成してあり、その一方の面の中央近傍が排出口3の端部開口4に対向するように配置してあるとともに、他方の面には、押圧板13の一方の面が対向するように該押圧板を配置してある。 The elastic sheet 6 is made of an elastic material having impermeable water, and is arranged so that the vicinity of the center of one surface faces the end opening 4 of the discharge port 3, and the other surface has an elastic sheet 6. , The pressing plate is arranged so that one surface of the pressing plate 13 faces each other.

押圧板13の他方の面には、突起16に一端を嵌め込む形で押圧バネ14の一端を当接させてあり、これらの押圧板13及び押圧バネ14は、該押圧板を介して押圧バネ14による押圧力を弾性シート6に伝達する押圧機構15として機能する。 One end of the pressing spring 14 is brought into contact with the other surface of the pressing plate 13 so that one end is fitted into the protrusion 16, and the pressing plate 13 and the pressing spring 14 are connected to the pressing spring 14 via the pressing plate. It functions as a pressing mechanism 15 that transmits the pressing force of 14 to the elastic sheet 6.

一方、押圧バネ14の他端は、調整板18に設けられた突起17に嵌め込む形で該調整板に当接させてあり、該調整板の反対側には、雄ネジが形成された調整ロッド19を該調整板の中央から延設してあるとともに、該雄ネジは、ボックス状ケーシング5の底部中央に設けられた雌ネジ21に螺合できるようになっており、これらの調整板18及び調整ロッド19は、該調整ロッドの回動操作及びそれに伴う調整板18の進退動作によって押圧バネ14の収縮状態を調整する押圧力調整機構20として機能する。 On the other hand, the other end of the pressing spring 14 is brought into contact with the adjusting plate in a form of being fitted into a protrusion 17 provided on the adjusting plate 18, and an adjustment with a male screw formed on the opposite side of the adjusting plate. The rod 19 extends from the center of the adjusting plate, and the male screw can be screwed into the female screw 21 provided at the center of the bottom of the box-shaped casing 5. These adjusting plates 18 The adjusting rod 19 functions as a pressing pressure adjusting mechanism 20 that adjusts the contracted state of the pressing spring 14 by the rotating operation of the adjusting rod and the accompanying advance / retreat operation of the adjusting plate 18.

ここで、弾性シート6は、排出口3からのモルタルの流出圧が、予め定められた設定値以下のとき、押圧板13を介して作用する押圧力で端部開口4の周縁に押し付けられることにより、排出口3からのモルタルの流出が遮断されるとともに、上記流出圧が設定値を上回ったとき、該流出圧により、押圧板13が押し戻されつつ、端部開口4の周縁から離間して排出口3からのモルタルの流出が許容されるようになっている。 Here, when the outflow pressure of the mortar from the discharge port 3 is equal to or less than a predetermined set value, the elastic sheet 6 is pressed against the peripheral edge of the end opening 4 by the pressing force acting through the pressing plate 13. As a result, the outflow of mortar from the discharge port 3 is blocked, and when the outflow pressure exceeds the set value, the pressing plate 13 is pushed back by the outflow pressure and separated from the peripheral edge of the end opening 4. The outflow of mortar from the discharge port 3 is allowed.

また、枠状保持部材7は、弾性シート6が端部開口4の周縁から離間した状態において、該端部開口から流出したモルタルが、湾曲部11,11の先端同士の間に形成された空きを介して外部に排出されるようになっている。 Further, in the frame-shaped holding member 7, when the elastic sheet 6 is separated from the peripheral edge of the end opening 4, the mortar flowing out from the end opening is vacant formed between the tips of the curved portions 11 and 11. It is designed to be discharged to the outside via.

なお、4本の連結ボルト8は、ボックス状ケーシング5の開口縁部12に設けられた4つのボルト挿通孔22、それらに対応する位置に設けられた弾性シート6のボルト挿通孔23及び枠状保持部材7のボルト挿通孔24に順次挿通された上、同じくボルト挿通孔22に対応する位置に設けられた4つのボルト孔25に螺着できるようになっている。 The four connecting bolts 8 include four bolt insertion holes 22 provided in the opening edge 12 of the box-shaped casing 5, bolt insertion holes 23 of the elastic sheet 6 provided at positions corresponding to them, and a frame shape. The holding member 7 is sequentially inserted into the bolt insertion holes 24, and can be screwed into four bolt holes 25 also provided at positions corresponding to the bolt insertion holes 22.

また、枠状保持部材7のコの字部10には、排出口3の端部開口4から流出するモルタルが上方に飛散することがないよう、該枠状保持部材及びその周囲の上方を覆う形で飛散防止板26を取り付けてある。 Further, the U-shaped portion 10 of the frame-shaped holding member 7 covers the frame-shaped holding member and its surroundings so that the mortar flowing out from the end opening 4 of the discharge port 3 does not scatter upward. A shatterproof plate 26 is attached in the form.

図3は、本実施形態に係る圧力制御弁1が適用されるグラウト材充填システム31を示したものであって、上述した配管2は、鉄筋コンクリート躯体32にほぼ鉛直上向きに形成された挿入穴33の開口34に設置された底型枠35の注入口36と加圧ポンプ37とを連通接続してあり、圧力制御弁1は、挿入穴33にせん断補強具38が挿入配置された状態で加圧ポンプ37から配管2に沿って圧送されてきたモルタルを注入口36から挿入穴33に注入するにあたり、配管2内のモルタルの圧力が設定値を上回ったとき、排出口3からのモルタルの流出を許容するとともに、配管2内のモルタルの圧力が設定値以下に戻ったときには、モルタルの流出を遮断する。 FIG. 3 shows a mortar material filling system 31 to which the pressure control valve 1 according to the present embodiment is applied, and the above-mentioned pipe 2 has an insertion hole 33 formed substantially vertically upward in the reinforced concrete skeleton 32. The injection port 36 of the bottom mold 35 installed in the opening 34 and the pressure pump 37 are connected in communication, and the pressure control valve 1 is added in a state where the shear reinforcing tool 38 is inserted and arranged in the insertion hole 33. When the mortar pumped from the pressure pump 37 along the pipe 2 is injected from the injection port 36 into the insertion hole 33, when the pressure of the mortar in the pipe 2 exceeds the set value, the mortar flows out from the discharge port 3. When the pressure of the mortar in the pipe 2 returns to the set value or less, the outflow of the mortar is blocked.

本実施形態に係る圧力制御弁1においては、押圧バネ14による押圧力が押圧板13を介して弾性シート6に伝達されるようになっており、配管2内をモルタルが流れる際、排出口3からの流出圧が予め定められた設定値以下のときには、図4(a)に示すように、押圧板13を介して作用する押圧力で、弾性シート6が排出口3の端部開口4の周縁に押し付けられるので、排出口3からのモルタルの流出は遮断される。 In the pressure control valve 1 according to the present embodiment, the pressing force of the pressing spring 14 is transmitted to the elastic sheet 6 via the pressing plate 13, and when the mortar flows through the pipe 2, the discharge port 3 is used. When the outflow pressure from the mortar is equal to or less than a predetermined set value, as shown in FIG. Since it is pressed against the peripheral edge, the outflow of mortar from the discharge port 3 is blocked.

設定値は、必要であれば弾性シート6の面内引張力を考慮しつつ、配管2や加圧ポンプ37が破損しないように適宜決定した上、その値に相当する荷重が押圧板13を介して弾性シート6に作用するように、押圧力調整機構20を操作して押圧バネ14の収縮状態を調整する。なお、調整ロッド19は、その先端に適当な治具(図示せず)を取り付けることで材軸回りに回せばよい。 The set value is appropriately determined so that the pipe 2 and the pressure pump 37 are not damaged while considering the in-plane tensile force of the elastic sheet 6 if necessary, and a load corresponding to the value is applied via the pressing plate 13. The pressing force adjusting mechanism 20 is operated to adjust the contracted state of the pressing spring 14 so as to act on the elastic sheet 6. The adjusting rod 19 may be rotated around the material axis by attaching an appropriate jig (not shown) to the tip thereof.

一方、流出圧が上述の設定値を上回ると、同図(b)に示すように、流出圧によって押圧板13が押し戻されるとともに、弾性シート6が排出口3の端部開口4の周縁から離間するので、排出口3からのモルタルの流出が許容される。 On the other hand, when the outflow pressure exceeds the above-mentioned set value, as shown in FIG. 3B, the pressing plate 13 is pushed back by the outflow pressure, and the elastic sheet 6 is separated from the peripheral edge of the end opening 4 of the discharge port 3. Therefore, the outflow of mortar from the discharge port 3 is allowed.

流出したモルタルは、適当な貯留槽(図示せず)を圧力制御弁1の直下に配置しておき、該貯留槽に貯まったモルタルを加圧ポンプ37の供給側に接続されたホッパー39に戻してやればよい。 For the mortar that has flowed out, an appropriate storage tank (not shown) is placed directly under the pressure control valve 1, and the mortar stored in the storage tank is returned to the hopper 39 connected to the supply side of the pressurizing pump 37. Just do it.

以上説明したように、本実施形態に係る圧力制御弁1によれば、流出圧が設定値以下のときには、弾性シート6が排出口3の端部開口4周縁に押し付けられることで、該端部開口近傍では液密状態となるので(図4(a))、端部開口4から水分が漏出してモルタルが脱水される事態が防止され、かくして排出口3の端部開口4近傍や弾性シート6の一方の面への砂の堆積付着が抑制される(脱水防止作用)。 As described above, according to the pressure control valve 1 according to the present embodiment, when the outflow pressure is equal to or less than the set value, the elastic sheet 6 is pressed against the peripheral edge of the end opening 4 of the discharge port 3, so that the end portion thereof. Since the liquid-tight state is formed in the vicinity of the opening (FIG. 4 (a)), the situation where water leaks from the end opening 4 and the mortar is dehydrated is prevented, and thus the vicinity of the end opening 4 of the discharge port 3 and the elastic sheet are prevented. Accumulation and adhesion of sand to one surface of 6 is suppressed (dehydration prevention action).

一方、流出圧が設定値を上回ったときは、弾性シート6が排出口3の端部開口4の周縁から離間して両者の間にスペースが生じ、この離間スペースを介してモルタルが排出口3から流出するが(同図(b))、その際の流出は、端部開口4が全断面で開放されなおかつ弾性シート6の面に沿って放射状に流れる形となるので、排出口3の端部開口4近傍や弾性シート6の一方の面には砂が本来的に堆積付着しにくく、また遮断状態の間に砂がそれらの箇所に堆積付着していたとしても、該砂は、弾性シート6の離間に伴うモルタルの排出流によって速やかに洗い流される(洗浄作用)。 On the other hand, when the outflow pressure exceeds the set value, the elastic sheet 6 is separated from the peripheral edge of the end opening 4 of the discharge port 3 to create a space between the two, and the mortar is discharged through the separation space of the discharge port 3. However, the outflow at that time is such that the end opening 4 is opened in the entire cross section and flows radially along the surface of the elastic sheet 6, so that the end of the discharge port 3 is discharged. Sand is inherently difficult to deposit and adhere to the vicinity of the opening 4 and one surface of the elastic sheet 6, and even if sand is deposited and adhered to those places during the blocking state, the sand is still the elastic sheet. It is quickly washed away by the discharge flow of mortar accompanying the separation of 6 (cleaning action).

また、本実施形態に係る圧力制御弁1によれば、不透水性を有する弾性シート6を挟んで排出口3と反対の側に押圧機構15や押圧力調整機構20を配置したので、排出口3から流出したモルタルが押圧機構15や押圧力調整機構20に浸入して該押圧機構や押圧力調整機構に粒状体が堆積付着するおそれがなくなり、押圧機構15や押圧力調整機構20の保守点検の負担を大幅に軽減することができる(隔離作用)。 Further, according to the pressure control valve 1 according to the present embodiment, since the pressing mechanism 15 and the pressing pressure adjusting mechanism 20 are arranged on the side opposite to the discharge port 3 with the elastic sheet 6 having impermeable water interposed therebetween, the discharge port There is no risk that the mortar flowing out of 3 will infiltrate the pressing mechanism 15 and the pressing pressure adjusting mechanism 20 and particles will be deposited and adhered to the pressing mechanism and the pressing pressure adjusting mechanism, and maintenance and inspection of the pressing mechanism 15 and the pressing pressure adjusting mechanism 20 will be performed. The burden on the body can be significantly reduced (isolation action).

また、本実施形態に係る圧力制御弁1によれば、調整ロッド19の回動操作及びそれに伴う調整板18の進退動作によって押圧バネ14の収縮状態を調整することができるので、該押圧バネによる押圧力を可変に設定することが可能となる。 Further, according to the pressure control valve 1 according to the present embodiment, the contracted state of the pressing spring 14 can be adjusted by the rotation operation of the adjusting rod 19 and the advancing / retreating operation of the adjusting plate 18 accompanying the rotation operation. The pressing force can be set variably.

また、弾性シート6の周縁が枠状保持部材7とボックス状ケーシング5の開口縁部12との間に狭着されるため、該弾性シートは、中央近傍が面外方向に自由に撓むことが可能となり、かくして上述した弾性シート6の弾性挙動が確実に発揮されるとともに、押圧機構15や押圧力調整機構20にモルタルが飛散するのをボックス状ケーシング5で防止することができるため、上述した隔離作用がより確実になり、押圧機構15や押圧力調整機構20の保守点検がほぼ不要になる。 Further, since the peripheral edge of the elastic sheet 6 is narrowly fitted between the frame-shaped holding member 7 and the opening edge portion 12 of the box-shaped casing 5, the elastic sheet is freely bent in the out-of-plane direction near the center. Thus, the elastic behavior of the elastic sheet 6 described above is surely exhibited, and the box-shaped casing 5 can prevent the mortar from scattering to the pressing mechanism 15 and the pressing pressure adjusting mechanism 20. The isolated action is more reliable, and maintenance and inspection of the pressing mechanism 15 and the pressing pressure adjusting mechanism 20 are almost unnecessary.

本実施形態では、枠状保持部材7及びその周囲の上方を覆う形で該枠状保持部材に飛散防止板26を設置したが、排出口3の端部開口4から流出するモルタルの飛散を懸念する必要がないのであれば、飛散防止板26を省略してもかまわない。 In the present embodiment, the shatterproof plate 26 is installed on the frame-shaped holding member 7 so as to cover the upper part of the frame-shaped holding member 7, but there is concern about the scattering of the mortar flowing out from the end opening 4 of the discharge port 3. If it is not necessary to do so, the shatterproof plate 26 may be omitted.

また、本実施形態では、押圧力調整機構20を構成するにあたり、ボックス状ケーシング5の底部中央に設けられた雌ネジ21に調整ロッド19の雄ネジを直接螺合させるようにしたが、これに代えて、図5に示すように、ハンドル53が取り付けられたスリーブ54を、ボックス状ケーシング5の底部中央に設けられた円孔55に回動自在に取り付けるとともに、該スリーブの内周面に形成された雌ネジ52に調整ロッド19の雄ネジを螺合してなる押圧力調整機構51を採用してもよい。 Further, in the present embodiment, in constructing the pressing force adjusting mechanism 20, the male screw of the adjusting rod 19 is directly screwed into the female screw 21 provided at the center of the bottom of the box-shaped casing 5. Instead, as shown in FIG. 5, the sleeve 54 to which the handle 53 is attached is rotatably attached to the circular hole 55 provided in the center of the bottom of the box-shaped casing 5, and is formed on the inner peripheral surface of the sleeve. A pressing force adjusting mechanism 51 formed by screwing the male screw of the adjusting rod 19 into the female screw 52 may be adopted.

かかる構成においては、ハンドル53でスリーブ54を回して調整ロッド19及び調整板18を該調整ロッドの材軸に沿って進退させることにより、押圧バネ14の収縮状態を調整することができる。 In such a configuration, the contracted state of the pressing spring 14 can be adjusted by turning the sleeve 54 with the handle 53 to move the adjusting rod 19 and the adjusting plate 18 forward and backward along the material axis of the adjusting rod.

なお、上記構成においては、調整ロッド19の材軸に沿った該調整ロッド及び調整板18の進退動作がスムーズに行われるよう、ボックス状ケーシング5の底部から2本のガイドロッド56,56を立設した上、該ガイドロッドを調整板18に設けた2つのガイド孔57,57にそれぞれ挿通してある。 In the above configuration, two guide rods 56, 56 are erected from the bottom of the box-shaped casing 5 so that the adjusting rod and the adjusting plate 18 can smoothly move forward and backward along the material shaft of the adjusting rod 19. After being installed, the guide rod is inserted into two guide holes 57 and 57 provided in the adjusting plate 18, respectively.

また、本実施形態では、モルタルが押圧機構15や押圧力調整機構20に飛散するのをボックス状ケーシング5で防止するようにしたが、弾性シートによる隔離作用でモルタルの飛散を十分に防止できるのであれば、ボックス状ケーシングを用いる必要はないし、押圧バネを適宜交換する等の方法で押圧力を可変にする必要がないのであれば、押圧力調整機構を備える必要もない。 Further, in the present embodiment, the box-shaped casing 5 prevents the mortar from scattering to the pressing mechanism 15 and the pressing pressure adjusting mechanism 20, but the separating action of the elastic sheet can sufficiently prevent the mortar from scattering. If so, it is not necessary to use a box-shaped casing, and if it is not necessary to make the pressing force variable by a method such as replacing the pressing spring as appropriate, it is not necessary to provide a pressing force adjusting mechanism.

図6に示した変形例に係る圧力制御弁61は、端部開口4を取り囲むように取付け部材67を設置するとともに該取付け部材に雌ネジ部66を突設し、反力板63、弾性シート6及び環状保持部材62を、それらに挿通された連結ボルト64を雌ネジ部66に螺着する形で配置できるようになっている。 In the pressure control valve 61 according to the modified example shown in FIG. 6, a mounting member 67 is installed so as to surround the end opening 4, and a female screw portion 66 is projected from the mounting member, and a reaction force plate 63 and an elastic sheet are provided. 6 and the annular holding member 62 can be arranged so that the connecting bolt 64 inserted therein is screwed onto the female screw portion 66.

環状保持部材62は、接着やボルト止め等の固着手段を適宜用いることで、弾性シート6をその周縁で保持できるようになっている。 The annular holding member 62 can hold the elastic sheet 6 on its peripheral edge by appropriately using a fixing means such as adhesion or bolting.

弾性シート6は上述の実施形態と同様、その一方の面の中央近傍が排出口3の端部開口4に対向するように配置してあるとともに、他方の面が押圧板13の一方の面に対向するように配置してあるが、本変形例では、押圧板13の反対側からその中央にてロッド状のガイド部材69が延設されており、該ガイド部材を反力板63の中央に形成されたガイド孔68に挿通してある。 Similar to the above-described embodiment, the elastic sheet 6 is arranged so that the vicinity of the center of one surface faces the end opening 4 of the discharge port 3, and the other surface is on one surface of the pressing plate 13. Although they are arranged so as to face each other, in this modified example, a rod-shaped guide member 69 extends from the opposite side of the pressing plate 13 at the center thereof, and the guide member is placed at the center of the reaction force plate 63. It is inserted through the formed guide hole 68.

また、押圧バネ14は、ガイド部材69が挿通される形で各端が押圧板13と反力板63の対向面にそれぞれ当接するように配置してあり、これらの押圧板13及び押圧バネ14は上述の実施形態と同様、該押圧板を介して押圧バネ14による押圧力を弾性シート6に伝達する押圧機構15として機能する。 Further, the pressing spring 14 is arranged so that each end abuts on the facing surface of the pressing plate 13 and the reaction force plate 63 so that the guide member 69 is inserted through the pressing spring 14, and the pressing plate 13 and the pressing spring 14 are respectively arranged. Functions as a pressing mechanism 15 that transmits the pressing force of the pressing spring 14 to the elastic sheet 6 via the pressing plate, as in the above-described embodiment.

本変形例に係る圧力制御弁61においては、実施形態と同様、押圧バネ14による押圧力が押圧板13を介して弾性シート6に伝達されるようになっており、配管2内をモルタルが流れる際、排出口3からの流出圧が予め定められた設定値以下のときには、図7(a)に示すように、押圧板13を介して作用する押圧力で、弾性シート6が排出口3の端部開口4の周縁に押し付けられるので、排出口3からのモルタルの流出は遮断される。なお、押圧バネ14による押圧力は、反力板63から反力をとる形で弾性シート6に載荷される。 In the pressure control valve 61 according to the present modification, as in the embodiment, the pressing force by the pressing spring 14 is transmitted to the elastic sheet 6 via the pressing plate 13, and the mortar flows in the pipe 2. When the outflow pressure from the discharge port 3 is equal to or less than a predetermined set value, the elastic sheet 6 is pressed by the pressing force acting through the pressing plate 13 as shown in FIG. Since it is pressed against the peripheral edge of the end opening 4, the outflow of mortar from the discharge port 3 is blocked. The pressing force of the pressing spring 14 is loaded on the elastic sheet 6 in the form of taking a reaction force from the reaction force plate 63.

一方、流出圧が上述の設定値を上回ると、同図(b)に示すように、流出圧により、反力板63のガイド孔68に挿通されたガイド部材69とともに、押圧板13が押し戻されつつ、弾性シート6が排出口3の端部開口4の周縁から離間するので、排出口3からのモルタルの流出が許容される。 On the other hand, when the outflow pressure exceeds the above-mentioned set value, the pressing plate 13 is pushed back together with the guide member 69 inserted into the guide hole 68 of the reaction force plate 63 by the outflow pressure, as shown in FIG. At the same time, since the elastic sheet 6 is separated from the peripheral edge of the end opening 4 of the discharge port 3, the outflow of mortar from the discharge port 3 is allowed.

以下、その他の構成や作用効果は、上述の実施形態と概ね同様であるので、ここでは詳細な説明を省略する。 Hereinafter, other configurations and actions and effects are substantially the same as those of the above-described embodiment, and therefore detailed description thereof will be omitted here.

1,61 圧力制御弁
2 配管
3 排出口
4 端部開口
5 ボックス状ケーシング
6 弾性シート
7 枠状保持部材
12 開口縁部
13 押圧板(押圧機構15)
14 押圧バネ(押圧機構15)
18 調整板(押圧力調整機構20)
19 調整ロッド(押圧力調整機構20)
21,52 雌ネジ
51 押圧力調整機構
1,61 Pressure control valve 2 Piping 3 Discharge port 4 End opening 5 Box-shaped casing 6 Elastic sheet 7 Frame-shaped holding member 12 Opening edge 13 Pressing plate (pressing mechanism 15)
14 Pressing spring (pressing mechanism 15)
18 Adjusting plate (pressing pressure adjusting mechanism 20)
19 Adjustment rod (push pressure adjustment mechanism 20)
21,52 Female screw 51 Pushing pressure adjustment mechanism

Claims (3)

粒状体を含む流動物が圧送される配管に設けられた排出口の端部開口に一方の面が対向するように配置される不透水性の弾性シートと、該弾性シートの他方の面に一方の面が対向するように配置される押圧板及び該押圧板の他方の面に一端が連結又は当接されることで前記押圧板を介して前記弾性シートに押圧力を伝達可能な押圧バネが設けられた押圧機構とを備えてなり、前記排出口からの前記流動物の流出圧が予め定められた設定値以下のとき、前記弾性シートが前記押圧板を介して作用する前記押圧力で前記端部開口の周縁に押し付けられることにより、前記排出口からの前記流動物の流出が遮断されるとともに、前記流出圧が前記設定値を上回ったとき、該流出圧により、前記押圧板が押し戻されつつ、前記弾性シートが前記端部開口の周縁から離間することにより、該端部開口が全断面で開放されなおかつ前記弾性シートの面に沿って放射状に流れる形で前記排出口からの前記流動物の流出が許容されるようになっていることを特徴とする圧力制御弁。 An impermeable elastic sheet arranged so that one surface faces the end opening of a discharge port provided in a pipe to which a fluid containing granules is pressure-fed, and one on the other surface of the elastic sheet. A pressing spring that can transmit pressing force to the elastic sheet via the pressing plate by connecting or abutting one end to the pressing plate arranged so that the surfaces of the pressing plates face each other and the other surface of the pressing plate. It is provided with a pressing mechanism provided, and when the outflow pressure of the fluid from the discharge port is equal to or less than a predetermined set value, the elastic sheet acts on the pressing plate with the pressing pressure. By being pressed against the peripheral edge of the end opening, the outflow of the fluid from the discharge port is blocked, and when the outflow pressure exceeds the set value, the pressing plate is pushed back by the outflow pressure. While the elastic sheet is separated from the peripheral edge of the end opening, the end opening is opened in the entire cross section and the fluid flows radially along the surface of the elastic sheet from the discharge port. A pressure control valve characterized in that the outflow of the pressure is allowed. 前記流出圧が前記弾性シートの中央領域に作用するように該弾性シートを前記端部開口に対して配置することにより、前記弾性シートが前記端部開口の周縁から離間する際に該弾性シートがその中央領域を膨らませる形で弾性変形するように構成した請求項1記載の圧力制御弁。By arranging the elastic sheet with respect to the end opening so that the outflow pressure acts on the central region of the elastic sheet, the elastic sheet is separated from the peripheral edge of the end opening. The pressure control valve according to claim 1, which is configured to elastically deform in a form that inflates the central region. 粒状体を含む流動物が圧送される配管に設けられた排出口の端部開口に一方の面が対向するように配置される不透水性の弾性シートと、該弾性シートの他方の面に一方の面が対向するように配置される押圧板及び該押圧板の他方の面に一端が連結又は当接されることで前記押圧板を介して前記弾性シートに押圧力を伝達可能な押圧バネが設けられた押圧機構とを備えてなり、前記排出口からの前記流動物の流出圧が予め定められた設定値以下のとき、前記弾性シートが前記押圧板を介して作用する前記押圧力で前記端部開口の周縁に押し付けられることにより、前記排出口からの前記流動物の流出が遮断されるとともに、前記流出圧が前記設定値を上回ったとき、該流出圧により、前記押圧板が押し戻されつつ、前記弾性シートが前記端部開口の周縁から離間することにより、前記排出口からの前記流動物の流出が許容されるようになっている圧力制御弁であって、
ボックス状ケーシングの底部中央に設けられた雌ネジに螺合される雄ネジが形成された調整ロッド及び該調整ロッドが中央近傍から延びその反対側に前記押圧バネの他端が連結又は当接される調整板からなり前記調整ロッドの回動操作及びそれに伴う前記調整板の進退動作によって前記押圧バネの収縮状態を調整する押圧力調整機構と、前記排出口近傍に取り付けられ前記ボックス状ケーシングの開口縁部との間に前記弾性シートの周縁が狭着できるように構成された枠状保持部材とを備え、該枠状保持部材は、設置姿勢で下方となる位置に開き部位が形成されるように横断面を開断面としてあり、前記弾性シートが前記端部開口の周縁から離間した状態において該端部開口から流出した前記流動物が前記開き部位を介して外部に排出されるようになっていることを特徴とする圧力制御弁。
An impermeable elastic sheet arranged so that one surface faces the end opening of a discharge port provided in a pipe to which a fluid containing granules is pressure-fed, and one on the other surface of the elastic sheet. A pressing spring that can transmit pressing force to the elastic sheet via the pressing plate by connecting or abutting one end to the pressing plate arranged so that the surfaces of the pressing plates face each other and the other surface of the pressing plate. It is provided with a pressing mechanism provided, and when the outflow pressure of the fluid from the discharge port is equal to or less than a predetermined set value, the elastic sheet acts on the pressing plate with the pressing pressure. By being pressed against the peripheral edge of the end opening, the outflow of the fluid from the discharge port is blocked, and when the outflow pressure exceeds the set value, the pressing plate is pushed back by the outflow pressure. A pressure control valve in which the elastic sheet is separated from the peripheral edge of the end opening so that the fluid can flow out from the discharge port.
An adjustment rod having a male screw screwed into a female screw provided in the center of the bottom of the box-shaped casing and the adjustment rod extending from the vicinity of the center, and the other end of the pressing spring is connected or abutted on the opposite side. A pressing pressure adjusting mechanism that adjusts the contraction state of the pressing spring by rotating the adjusting rod and moving the adjusting plate forward and backward, and an opening of the box-shaped casing attached near the discharge port. A frame-shaped holding member configured so that the peripheral edge of the elastic sheet can be narrowly fitted to the edge portion is provided, and the frame-shaped holding member is formed with an opening portion at a position lower in the installation posture. The cross section is an open cross section, and the fluid flowing out from the end opening is discharged to the outside through the opening portion in a state where the elastic sheet is separated from the peripheral edge of the end opening. A pressure control valve characterized by being present.
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