JPH0719370A - Fluid control valve - Google Patents

Abstract

PURPOSE:To carry out the initial water passing for internal cleaning after the completion of piping work with a fluid control valve incorporated and without using an alternate pipe. CONSTITUTION:A valve body 10 which comes into action according to a difference between the secondary pressure and a load against it together with a valve seat 3 to control the pressure and flow rate of fluid is held at the maximum valve opening position by a manual forcibly valve opening mechanism 31 so that the initial passing water may run without a solid foreign matter being caught in a valve seat, 3 and the valve body 10.

Description

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

【０００１】[0001]

【産業上の利用分野】本発明は主に戸別給水・給湯設備
に使用される流体制御弁、詳しくは強制開弁機構または
バイパス機構、およびこれに加えて強制閉止機構を具え
た減圧弁、減圧定流量弁または定流量弁に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid control valve mainly used for door-to-door water supply / hot water supply equipment, more specifically, a forced valve opening mechanism or bypass mechanism, and a pressure reducing valve and pressure reducing valve equipped with a forced closing mechanism. It relates to a constant flow valve or a constant flow valve.

【０００２】[0002]

【従来の技術】例えば、集合住宅の戸別給水・給湯設備
においては一住戸への配管に仕切弁、流体制御弁、止水
栓、量水器、仕切弁を順に設置している。そして、こら
らの弁を組込んだ配管を施工完了した後の初期通水時に
配管内に残存している固形異物が流体制御弁や量水器に
引掛かって損傷させたり正常な機能を損なわせたりする
ことがある。2. Description of the Related Art For example, in a water supply and hot water supply system for each house of an apartment house, a sluice valve, a fluid control valve, a water stopcock, a water meter, and a sluice valve are sequentially installed in a pipe to one dwelling unit. Then, during the initial water flow after the construction of the pipes incorporating these valves is completed, the solid foreign matter remaining in the pipes may be caught in the fluid control valve or the water meter, causing damage or impairing its normal function. It may happen.

【０００３】そこで、図１２に示すように配管１０１に
仕切弁１０２，減圧弁代用管１０３，止水栓１０４，量
水器代用管１０５，仕切弁１０６を順に設置し、仕切弁
１０２，１０６，止水栓１０４を全開状態として初期通
水を行ない配管１０１の内部を清掃して異形異物を流出
除去してから代用管１０３，１０５を外して減圧弁１０
７，量水器１０８を設置している。Therefore, as shown in FIG. 12, a sluice valve 102, a pressure reducing valve substitute pipe 103, a water stopper 104, a water meter substitute pipe 105, and a sluice valve 106 are installed in this order in the sluice valve 102, 106, With the water shut-off plug 104 fully opened, initial water is passed to clean the inside of the pipe 101 to remove and remove irregular foreign matter, and then the substitute pipes 103 and 105 are removed to reduce the pressure.
7. A water meter 108 is installed.

【０００４】このため、代用管１０３，１０５の設置と
取外し、減圧弁１０７および量水器１０８の設置という
二重の工事が一住戸の配管１０１につき二個所ずつ必要
となり、設備工事を煩雑なものとしているばかりか工費
が嵩む、工期短縮が困難である、という問題がある。ま
た、配管が量水器をもたない場合であっても減圧弁のよ
うな流体制御弁に代用管が必要であってこれらの問題を
抱えている。For this reason, it is necessary to carry out the double work of installing and removing the substitute pipes 103 and 105, and installing the pressure reducing valve 107 and the water meter 108 in two places per pipe 101 of one dwelling unit, which complicates the facility work. In addition to the above, there are problems that the construction cost is high and it is difficult to shorten the construction period. Further, even when the pipe does not have a water meter, a substitute pipe is required for a fluid control valve such as a pressure reducing valve, and these problems are held.

【０００５】更に、減圧弁１０７がストレーナを具えて
いるときはその清掃や交換を行なうとき、或いは減圧弁
１０７自身またはその二次側に設置されている量水器１
０８などの機器の保守点検を行なうときに水の流れを停
止させる必要があり、そのために配管１０１に止水栓１
０４が設置されなければならないので配管構造の簡単化
および設備費用の低減を計ることができない。Further, when the pressure reducing valve 107 is equipped with a strainer, when cleaning or replacing the strainer, or the water meter 1 installed on the pressure reducing valve 107 itself or its secondary side.
It is necessary to stop the flow of water when performing maintenance and inspection of equipment such as 08.
Since 04 must be installed, simplification of the piping structure and reduction of equipment cost cannot be achieved.

【０００６】[0006]

【発明が解決しようとする課題】本発明は、配管を施工
完了して初期通水を行ない配管内の残存異物を除去清掃
するにあたって、異物が引掛かりやすい流体制御弁の代
りに代用管を設置しているため工事が煩雑であるととも
に工費低減、工期短縮が困難である、という点およびこ
れに加えて配管内の機器の清掃や部品交換、保守点検を
行なうため止水栓が必要であり配管構造簡単化、設備費
用低減が計れない、という点を解決しようとするもので
ある。SUMMARY OF THE INVENTION According to the present invention, a substitute pipe is installed in place of a fluid control valve where foreign matter is apt to be caught when the foreign matter in the pipe is removed and cleaned by completing the construction of the pipe and performing initial water passage. The construction is complicated and it is difficult to reduce the construction cost and the construction period.In addition to this, a water stopcock is required to clean the equipment inside the pipe, replace parts, and perform maintenance inspection. It aims to solve the problem that the structure cannot be simplified and the facility cost cannot be reduced.

【０００７】[0007]

【課題を解決するための手段】本発明は流体の入口から
出口に至る流路に設けた弁座と、二次側流体圧力とこれ
に対抗する荷重即ちばね力または一次側圧力との差に応
じて作動する弁体とを具え、これらの弁座と弁体とが協
働して流体の圧力、流量のいずれかまたは両方を制御す
る流体制御弁を組込んだ配管に派生する前記課題を解決
する手段を流体制御弁自身に具えさせ、これによって初
期通水時の流体制御弁保護のための代用管を不要として
配管工事の簡単化、工費節減、工期短縮を計り、更に加
えて配管内機器の清掃や部品交換、保守点検時の通水停
止のための止水栓を不要として配管構造簡単化、設備費
用低減を計る、という目的を達成させることとした。According to the present invention, there is provided a valve seat provided in a flow path from a fluid inlet to an outlet, and a difference between a secondary side fluid pressure and a load or spring force or a primary side pressure opposing thereto. A valve body that operates in accordance with the above, and the valve seat and the valve body cooperate with each other to solve the above-mentioned problem derived from a pipe incorporating a fluid control valve for controlling either or both of fluid pressure and flow rate. By providing a solution to the fluid control valve itself, this eliminates the need for a substitute pipe to protect the fluid control valve during initial water flow, simplifying piping work, reducing construction costs, and shortening the construction period. It was decided to achieve the objectives of simplifying the piping structure and reducing facility costs by eliminating the need for a water stopcock for cleaning equipment, replacing parts, and stopping water flow during maintenance and inspection.

【０００８】即ち、本発明は第一の手段として、弁体を
開弁位置に保持する手動の強制開弁機構を具えさせ、或
いはこれに加えて流路の一次側を閉止する手動の閉止機
構を具えさせた。尚、一次側にストレーナが設置されて
いるときは、その入口側に閉止機構が配置される。That is, according to the present invention, as a first means, a manual forced valve opening mechanism for holding the valve element in the valve opening position is provided, or in addition to this, a manual closing mechanism for closing the primary side of the flow path. I was equipped with. When the strainer is installed on the primary side, the closing mechanism is arranged on the inlet side.

【０００９】また、本発明は第二の手段として、流路の
一次側と二次側とを弁座を通ることなく接続する側流路
を設けて流路の一次側と二次側とを弁座と側流路のいず
れかを経由して連通させる手動の流路切換機構を具えさ
せ、或いはこの流路切換機構を三位置方向切換弁とし
た。尚、一次側にストレーナが設置されているときは、
その入口側に流路切換機構が配置される。Further, as a second means of the present invention, a side flow passage for connecting the primary side and the secondary side of the flow passage without passing through the valve seat is provided to connect the primary side and the secondary side of the flow passage. A manual flow passage switching mechanism that communicates via either the valve seat or the side flow passage is provided, or this flow passage switching mechanism is a three-position directional switching valve. If a strainer is installed on the primary side,
A flow path switching mechanism is arranged on the inlet side.

【００１０】更に、本発明は第三の手段として、流路の
一次側と二次側とを弁座を通ることなく接続する側流路
を設けて流路の一次側と側流路とにそれぞれを各別に閉
止する手動の閉止機構を具えさせた。尚、一次側にスト
レーナが設置されるときは、その入口側に一次側の閉止
機構が配置される。尚また、側流路にストレーナが設置
されることもある。Further, according to the present invention, as a third means, a side flow passage for connecting the primary side and the secondary side of the flow passage without passing through the valve seat is provided to connect the primary side and the side flow passage. It was equipped with a manual closure mechanism to close each separately. When the strainer is installed on the primary side, the closing mechanism on the primary side is arranged on the inlet side. In addition, a strainer may be installed in the side channel.

【００１１】[0011]

【作用】本発明の流体制御弁は配管に施工の際に組込ま
れるものであり、内部清掃のための初期通水を行なうと
き、第一の手段の場合は強制開弁機構によって弁体を最
大の開弁位置に保持させ、第二の手段の場合は流路切換
機構により弁座側を閉じて側流路を開き、第三の手段の
場合には一次側の閉止機構により弁座側を閉じる。これ
により正規の流路または一時的に開かれた側流路を固形
異物が引掛かることなく初期通水が流れる。The fluid control valve of the present invention is incorporated in the pipe at the time of construction, and when performing initial water passage for internal cleaning, in the case of the first means, the valve opening is maximized by the forced valve opening mechanism. In the case of the second means, the valve seat side is closed by the flow path switching mechanism to open the side flow path, and in the case of the third means, the valve seat side is closed by the primary side closing mechanism. close. As a result, the initial water flow flows without the solid foreign matter being caught in the regular flow path or the temporarily opened side flow path.

【００１２】また、清掃、部品交換、保守点検を行なう
とき、第一および第三の手段の場合は閉止機構により、
第二の手段の場合は流路切換弁により流体の流れを停止
させる。Further, when performing cleaning, replacement of parts, and maintenance / inspection, in the case of the first and third means, a closing mechanism is used.
In the case of the second means, the flow of the fluid is stopped by the flow path switching valve.

【００１３】[0013]

【実施例１】図１，２，３は請求項１，２，３に記載の
第一発明の実施例を示すものであって、弁本体１の内部
に形成された流路２の中間部にシート面が下向きの弁座
３が設けられ、その上方である一次室５は流路２の一次
通路６と連通し下方である二次室７は二次通路８と連通
している。二次室７にはディスク形の弁体１０が装入さ
れており、この弁体１０を固着して弁座孔４，一次室５
を貫通し上方へ延びる弁体ステム１１が一次室５の上方
において弁本体１に貫通形成したピストンガイド孔１２
に液密に嵌装されたピストン１３に結合されている。ま
た、弁体１０から二次室７を貫通して下方へ延びる案内
棒１４が弁本体１の下ふた体１５の案内孔１６に挿入さ
れているとともに、弁体１０と下ふた体１５との間に圧
縮コイルばねからなる閉弁ばね１７が装入されている。Embodiment 1 FIGS. 1, 2 and 3 show an embodiment of the first invention described in claims 1, 2 and 3, wherein an intermediate portion of a flow path 2 formed inside a valve body 1 is shown. Is provided with a valve seat 3 having a seat surface facing downward, and a primary chamber 5 located above the valve seat 3 communicates with a primary passage 6 of the flow passage 2 and a secondary chamber 7 located below communicates with a secondary passage 8. A disk-shaped valve body 10 is inserted in the secondary chamber 7, and the valve body 10 is fixed to fix the valve seat hole 4 and the primary chamber 5.
A piston guide hole 12 formed by penetrating the valve body 1 above the primary chamber 5 to extend upward through the valve body stem 11.
Is connected to a piston 13 which is fitted in a liquid-tight manner. In addition, a guide rod 14 extending downward from the valve body 10 through the secondary chamber 7 is inserted into a guide hole 16 of the lower lid body 15 of the valve body 1, and the valve body 10 and the lower lid body 15 are connected to each other. A valve closing spring 17 made up of a compression coil spring is inserted between them.

【００１４】弁本体１の上方にはばねケース１８が取付
けられており、それらに外側周縁部を挟み固定したダイ
ヤフラム１９の中心下面に重ねてボルト２０により固着
したナット状のダイヤフラムステム２１がピストン１３
の上面へ開口した嵌入孔２２に先端を孔底に接触させて
嵌入している。A spring case 18 is mounted above the valve main body 1, and a nut-shaped diaphragm stem 21 is secured to the piston 13 by a bolt 20 so as to be superposed on the central lower surface of a diaphragm 19 having an outer peripheral edge sandwiched therebetween.
The fitting hole 22 opened to the upper surface is fitted with the tip in contact with the hole bottom.

【００１５】減圧弁においてダイヤフラムと弁体とはス
テムによって直結されており、これらが常に一体に動く
ようになっているのが普通であるが、本実施例のように
弁体１０と一体に動く弁体ステム１１およびダイヤフラ
ム１９と一体に動くダイヤフラムステム２１を互いに嵌
合して別体に動くように構成すると、ダイヤフラム１９
に初期通水時、耐圧・気密試験時或いは万一の一次側か
らの漏洩時の高圧流体が働いて弁体１０の閉弁ストロー
クよりも大きく動いても、弁体１０はこのダイヤフラム
１９に引張られることなく閉弁ばね１７のばね力のみで
弁座３に接触し喰込みを生じることがなくなる。In the pressure reducing valve, the diaphragm and the valve body are directly connected by the stem, and normally these are always moved together, but as in this embodiment, they are moved together with the valve body 10. If the diaphragm stem 21 that moves integrally with the valve body stem 11 and the diaphragm 19 are fitted together and move separately, the diaphragm 19
Even when the high pressure fluid acts during initial water flow, pressure resistance / airtightness test, or leakage from the primary side, the valve body 10 is pulled by the diaphragm 19 even if it moves more than the valve closing stroke of the valve body 10. It is prevented that the valve seat 3 comes into contact with the valve seat 3 only by the spring force of the valve closing spring 17 without being bitten.

【００１６】また、正常な閉弁時においても閉弁終期に
は閉弁ばね１７のばね力のみで弁座３に着座し、二次側
流体圧力が急激に上昇した場合であっても衝撃なく閉弁
させることができる、という利点がある。Further, even when the valve is normally closed, at the end of the valve closing, the valve seat 3 is seated only by the spring force of the valve closing spring 17, and even if the secondary side fluid pressure rises sharply, there is no impact. There is an advantage that the valve can be closed.

【００１７】また、ばねケース１８の中心軸線上に調節
ねじ２３が配置され、その上端部はばねケース１８の上
方へ突出してロックナット２４により固定されていると
ともにキャップ２５がかぶせられている。ばねケース１
８は平面非円形であって、調節ねじ２３に螺装した上ば
ね受２６を内接させて上下可動としている。An adjusting screw 23 is arranged on the central axis of the spring case 18, and the upper end of the adjusting screw 23 projects upward from the spring case 18, is fixed by a lock nut 24, and is covered with a cap 25. Spring case 1
Reference numeral 8 is a non-circular plane, and an upper spring receiver 26 screwed on the adjusting screw 23 is inscribed therein to be movable up and down.

【００１８】上ばね受２６とダイヤフラム１９の上面に
重ねた下ばね受２７との間には圧縮コイルばねからなる
調節ばね２８が嵌入されており、弁本体１の上面とダイ
ヤフラム１９の下面との間のダイヤフラム室２９は二次
通路８と圧力検出路３０によって接続されている。An adjusting spring 28, which is a compression coil spring, is fitted between the upper spring bearing 26 and the lower spring bearing 27 which is superposed on the upper surface of the diaphragm 19, and serves to connect the upper surface of the valve body 1 and the lower surface of the diaphragm 19. The diaphragm chamber 29 in between is connected to the secondary passage 8 by the pressure detection passage 30.

【００１９】以上の構成は二次側流体圧力をダイヤフラ
ム１９で検知し対抗する調節ばね２８のばね力と不均衡
を生じたときダイヤフラム１９の動きに連動して弁体１
０が開閉動作を行なうものであり、実公昭４６−５７５
４号公報などに見られるように広く知られた減圧弁と同
じ働きをする。With the above construction, when the secondary side fluid pressure is detected by the diaphragm 19 and an imbalance occurs with the spring force of the adjusting spring 28 which opposes it, the valve body 1 is interlocked with the movement of the diaphragm 19.
No. 0 is for opening and closing operation.
It has the same function as a widely known pressure reducing valve as seen in Japanese Patent No. 4 publication.

【００２０】次に、本発明に係る手動の強制開弁機構３
１について説明すると、本実施例では調節ねじ２３に貫
通形成した差込孔３２と、この差込孔３２に挿入される
押棒３３と調節ねじ２３にねじ嵌合する雌ねじ部３４と
を有する冶具本体３５につまみ３６を取付けた開弁冶具
３７とによって構成されている。尚、差込孔３２の下端
にはシールプラグ３８が軸心方向可動に密嵌してあり、
このシールプラグ３８はダイヤフラム１９が破れたとき
流体が差込孔３２を通って外部に流出するのを防止する
ものである。Next, the manual forced valve opening mechanism 3 according to the present invention.
1 will be described. In this embodiment, a jig main body having an insertion hole 32 penetratingly formed in the adjustment screw 23, a push rod 33 inserted into the insertion hole 32, and a female screw portion 34 screw-fitted to the adjustment screw 23. The valve opening jig 37 includes a knob 35 and a knob 36 attached thereto. A seal plug 38 is tightly fitted to the lower end of the insertion hole 32 so as to be movable in the axial direction.
The seal plug 38 prevents fluid from flowing out through the insertion hole 32 when the diaphragm 19 is broken.

【００２１】このような強制開弁機構３１を具えた本実
施例の減圧弁は、配管施工時に代用管を用いることなく
最初から配管に組込むものである。そして、キャップ２
５を外して調整ねじ２３を回し上ばね受２６を下降させ
ることにより調節ばね２８を圧縮し、閉弁ばね１７のば
ね力にうち勝ってダイヤフラムステム２１がピストン１
３を押下げ弁体１０を最大開度に開かせる。次に、開弁
治具３７の押棒３３を差込孔３２に挿入し雌ねじ部３４
を調整ねじ２３にねじ込むと、押棒３３の先端がシール
プラグ３８をボルト２０の頭に接触させてダイヤフラム
１９、ダイヤフラムステム２１、ピストン１３、弁体ス
テム１２、弁体１０を最大開度位置に保持する（図２参
照）。The pressure reducing valve of this embodiment provided with such a forced valve opening mechanism 31 is built into the pipe from the beginning without using a substitute pipe when constructing the pipe. And cap 2
5, the adjusting screw 23 is rotated and the upper spring receiver 26 is lowered to compress the adjusting spring 28, which overcomes the spring force of the valve closing spring 17 and causes the diaphragm stem 21 to move to the piston 1
3 is pushed down and the valve body 10 is opened to the maximum opening degree. Next, the push rod 33 of the valve opening jig 37 is inserted into the insertion hole 32, and the female screw portion 34
When the screw is screwed into the adjusting screw 23, the tip of the push rod 33 brings the seal plug 38 into contact with the head of the bolt 20 to hold the diaphragm 19, the diaphragm stem 21, the piston 13, the valve body stem 12, and the valve body 10 at the maximum opening position. (See FIG. 2).

【００２２】この状態で初期通水し配管の内部清掃を行
なうとき、通水圧力が高くても弁体１０は最大開度を保
持しているので弁座３との隙間は大きく、従って金属屑
のような固形異物は引掛かることなく流れて配管外部に
流出除去されることとなるのである。In this state, when the initial passage of water is carried out to clean the inside of the pipe, the valve element 10 maintains the maximum opening even if the water pressure is high, so that the gap with the valve seat 3 is large, and accordingly, the metal scrap. Such solid foreign matter flows without being caught and flows out of the pipe to be removed.

【００２３】内部清掃を完了して初期通水を停止したと
き、開弁治具３７を調節ねじ２３から外し、そして調節
ねじ２３を前記の反対方向へ回して調節ばね２８が所定
の設定荷重となる位置に上ばね受２６を上昇させ、キャ
ップ２５をかぶせて図１の状態とし本来の減圧弁として
働かせる。When the internal cleaning is completed and the initial water supply is stopped, the valve opening jig 37 is removed from the adjusting screw 23, and the adjusting screw 23 is rotated in the opposite direction to set the adjusting spring 28 to a predetermined set load. The upper spring support 26 is raised to the position, and the cap 25 is covered to bring it to the state shown in FIG.

【００２４】更に、本発明に係る手動の閉止機構４０に
ついて説明すると、本実施例では一次通路６に形成した
弁口４１と、弁本体１に螺装固定した閉止キャップ４２
に貫通螺装したねじ杆４３の先端に設けられた閉止弁体
４４とを具えた構成とされている。Further, the manual closing mechanism 40 according to the present invention will be described. In this embodiment, the valve opening 41 formed in the primary passage 6 and the closing cap 42 screwed to the valve body 1 are fixed.
And a shut-off valve body 44 provided at the tip of a threaded rod 43 threaded through.

【００２５】閉止弁体４４は一次通路６の上流側から弁
口４１に出し入れされて流路２を開閉するものであり、
弁口４１の下流側には弁本体１に螺装したストレーナプ
ラグ４７に取付けた筒状のストレーナ４８が装入されて
いる（図２参照）。The shut-off valve element 44 is inserted into and removed from the valve port 41 from the upstream side of the primary passage 6 to open and close the flow passage 2,
A cylindrical strainer 48 attached to a strainer plug 47 screwed into the valve body 1 is inserted downstream of the valve port 41 (see FIG. 2).

【００２６】このような閉止機構４０を具えた本実施例
の減圧弁は、閉止弁体４４を閉止キャップ４２に接する
位置まで後退させて初期通水を行ない且つ本来の減圧弁
として働かせるものである。そして、ストレーナ４８の
清掃や交換、減圧弁自身または他の機器の保守点検を行
なうときはねじ杆４３を閉止キャップ４２に深くねじ込
むことにより閉止弁体４４を弁口４１に密に嵌入して流
路２を閉鎖し、流体の流れを停止させる。In the pressure reducing valve of this embodiment having the closing mechanism 40 as described above, the closing valve body 44 is retracted to a position in contact with the closing cap 42 to perform initial water flow and to function as an original pressure reducing valve. . When the strainer 48 is to be cleaned or replaced, or the pressure reducing valve itself or other equipment is to be maintained and inspected, the threaded rod 43 is deeply screwed into the closing cap 42 to tightly fit the closing valve body 44 into the valve opening 41 and flow. The passage 2 is closed and the fluid flow is stopped.

【００２７】配管内機器の清掃や部品交換、保守点検を
完了したとき、ねじ杆４３を前記の反対方向へ回して閉
止弁体４４を弁口４１から抜出して図２の状態に戻す。When the cleaning, replacement of parts, and maintenance / inspection of the equipment in the pipe are completed, the screw rod 43 is turned in the opposite direction to withdraw the shut-off valve element 44 from the valve opening 41 and return it to the state of FIG.

【００２８】閉止機構４０はストレーナ４８の入口側に
配置されているので、流路２を閉鎖してストレーナプラ
グ４７を外したときの流体流出量が少ない、という利点
をもつが、一次通路６がストレーナをもたないときは任
意の個所に設置される。Since the closing mechanism 40 is arranged on the inlet side of the strainer 48, it has the advantage that the fluid outflow amount is small when the flow path 2 is closed and the strainer plug 47 is removed. If it does not have a strainer, it will be installed anywhere.

【００２９】[0029]

【実施例２】図４は請求項１，２，３に記載の第一発明
における強制開弁機構の異なる実施例を示すものであっ
て、図示しない調節ばねのばね荷重を調節する調節ねじ
が開弁位置保持用の押棒を挿通する差込孔を有しておら
ず、弁本体１の下ふた体５１に挿入された案内棒５３を
用いて開弁させることを特徴としている。[Embodiment 2] FIG. 4 shows a different embodiment of the forced valve opening mechanism according to the first aspect of the present invention, wherein an adjusting screw for adjusting the spring load of an adjusting spring (not shown) is provided. It is characterized in that it does not have an insertion hole through which a push rod for holding the valve opening position is inserted, and that the valve is opened using a guide rod 53 inserted in the lower lid body 51 of the valve body 1.

【００３０】即ち、この強制開弁機構５０は下ふた体５
１に貫通形成した案内孔５２に密に挿入した弁体１０の
案内棒５３の先端に設けられた雄ねじ部５４と、下ふた
体５１に設けた取付ねじ孔５５にねじ込まれる雄ねじ５
６および雄ねじ部５４を緩く嵌込んだくぼみ５７を有す
るプラグ体５８と雄ねじ部５４にねじ嵌合するねじ孔５
９を有し取付ねじ孔５５に緩く嵌入するナット体６０と
を一体且つ反対向きに形成してなる開弁治具６１とによ
って構成されている。That is, the forced valve opening mechanism 50 is provided in the lower lid body 5.
1. A male screw portion 54 provided at the tip of the guide rod 53 of the valve body 10 that is tightly inserted in the guide hole 52 formed through the first body 1, and a male screw 5 that is screwed into the mounting screw hole 55 provided in the lower lid body 51.
6 and a plug body 58 having a recess 57 into which the male screw portion 54 is loosely fitted, and a screw hole 5 for screw-fitting into the male screw portion 54.
9 and a nut body 60 that is loosely fitted into the mounting screw hole 55 and is integrally formed in the opposite direction.

【００３１】このような強制開弁機構５０を具えた本実
施例の減圧弁を配管施工時に配管に組込んで初期通水を
行なうとき、開弁治具６１のねじ孔５９を雄ねじ部５４
にねじ込んで回すと弁体１０が引張られて開弁ばね１７
を圧縮し弁座３から離れる。弁体１０にはストッパ６２
が設けてあり、これが下ふた体５１に接するまで弁体１
０を引張ることができ、ナット体６０の先端面が取付ね
じ孔５５の奥面に接することによって弁体１０を最大開
度位置に保持する（図４のＡ）。When the pressure reducing valve of this embodiment having such a forced valve opening mechanism 50 is incorporated into the pipe at the time of construction of the pipe for initial water passage, the screw hole 59 of the valve opening jig 61 is screwed into the male screw portion 54.
When it is screwed in and turned, the valve body 10 is pulled and the valve opening spring 17
Is compressed and separated from the valve seat 3. A stopper 62 is provided on the valve body 10.
The valve body 1 is provided until it comes into contact with the lower lid body 51.
0 can be pulled, and the tip end surface of the nut body 60 contacts the inner surface of the mounting screw hole 55 to hold the valve body 10 at the maximum opening position (A in FIG. 4).

【００３２】内部清掃を終ったときナット体６０を雄ね
じ部５４から外して開弁治具６１の向きを変え、プラグ
体５８を取付ねじ孔５５にねじ込んで案内孔５２を閉鎖
し流体の万一の漏れをなくした状態で本来の減圧弁とし
て働かせる（図４のＢ）。When the internal cleaning is finished, the nut body 60 is removed from the male screw portion 54, the direction of the valve opening jig 61 is changed, and the plug body 58 is screwed into the mounting screw hole 55 to close the guide hole 52 and close the fluid. It works as an original pressure reducing valve in the state where the leak of (1) is eliminated (B in FIG. 4).

【００３３】尚、本実施例においても実施例１のように
二次側流体圧力検知用のダイヤフラムと弁体１０とを直
結させない構造を採用することにより、初期通水が高圧
であってもダイヤフラムが弁体１０に拘束されることな
く動くので破損する心配をなくす。また本実施例の減圧
弁も実施例１と同様の閉止機構、ストレーナを具えてい
る。Even in this embodiment, as in the first embodiment, by adopting a structure in which the secondary side fluid pressure detecting diaphragm and the valve body 10 are not directly connected to each other, even if the initial water flow is high pressure, the diaphragm is Since it moves without being restricted by the valve body 10, there is no fear of damage. The pressure reducing valve of this embodiment also has the same closing mechanism and strainer as in the first embodiment.

【００３４】[0034]

【実施例３】図５は請求項１，２，３に記載の第一発明
における強制開弁機構の更に異なる実施例を示すもので
あって、実施例２と同様に弁体を引張って開弁させるも
のである。[Third Embodiment] FIG. 5 shows a further different embodiment of the forced valve opening mechanism according to the first aspect of the present invention as defined in claims 1, 2 and 3. It is what makes me speak.

【００３５】即ち、この強制開弁機構６４は下ふた体６
５にふた体カバー６６をねじ嵌合により取付けて弁体１
０の案内棒６７をこれらに貫通させ、案内棒６７のふた
体カバー６６からの突出端にレバー６８の先端部を着脱
可能に取付けた構成であり、開弁ばね１７はふた体カバ
ー６６とその内部において案内棒６７に装着したばね受
６９との間に装入されている。That is, the forced valve opening mechanism 64 is provided in the lower lid body 6.
5 by attaching the lid body cover 66 by screw fitting to the valve body 1
The guide rod 67 of No. 0 is pierced through them, and the tip end portion of the lever 68 is detachably attached to the projecting end of the guide rod 67 from the lid cover 66. It is inserted between the spring bearing 69 mounted on the guide rod 67 inside.

【００３６】このような強制開弁機構６４を具えた本実
施例の減圧弁を配管施工時に配管に組込んで初期通水を
行なうとき、レバー６８をその先端をふた体カバー６６
の下面に押し当てて回動することにより閉弁ばね１７を
圧縮して案内棒６７を引下げ弁体１０を弁座３から離
し、レバー６８を持ったまま開弁状態を維持するか、ま
たはレバー６８を回転モーメントが生じない案内棒６７
と同一軸心上に放置して弁体１０を最大開度位置に保持
する（図５のＡ）。When the pressure reducing valve of this embodiment having such a forced valve opening mechanism 64 is installed in the pipe at the time of construction of the pipe for initial water passage, the lever 68 is covered with the body cover 66.
The valve closing spring 17 is compressed by pushing it against the lower surface of the valve to lower the guide rod 67 to separate the valve body 10 from the valve seat 3 and maintain the valve open state while holding the lever 68, or 68 is a guide rod 67 that does not generate a rotation moment
Then, the valve body 10 is left at the same axis as the above and the valve body 10 is held at the maximum opening position (A in FIG. 5).

【００３７】内部清掃を終ったときレバー６８を前記の
反対方向へ回動してふた体カバー６６から離し自由な状
態とし、本来の減圧弁として働かせる（図５のＢ）。When the internal cleaning is finished, the lever 68 is rotated in the opposite direction to be separated from the lid cover 66 to be in a free state, so that it functions as an original pressure reducing valve (B in FIG. 5).

【００３８】尚、本実施例の減圧弁も実施例１のように
二次側流体圧力検知用のダイヤフラムと弁体１０とを直
結させない構造とされ、また実施例１と同様の閉止機
構、ストレーナを具えている。The pressure reducing valve of the present embodiment is also constructed such that the diaphragm for detecting the secondary fluid pressure and the valve body 10 are not directly connected to each other as in the first embodiment, and the closing mechanism and strainer similar to those of the first embodiment are used. It is equipped with

【００３９】前記実施例２，３のように下ふた体５１，
６５の側から弁体１０を強制開弁させるとその機構が小
形、簡単化できる利点がある。As in the second and third embodiments, the lower lid body 51,
Forcibly opening the valve body 10 from the side of 65 has the advantage that the mechanism can be made compact and simple.

【００４０】[0040]

【実施例４】図６，７は請求項４，５，６に記載の第二
発明の実施例を示すもので、弁本体１の流路２に設けた
弁座３と協動して一次通路６と二次通路８とを連直また
は遮断する弁体１０と弁体ステム１１を介して一体のピ
ストン１３が二次側流体圧力検知用のダイヤフラム１９
と一体のダイヤフラムステム２１と互いに嵌合して別体
に動くようになっていること、ばねケース１８の内部の
調節ばね２８のばね力が調節ねじ２３と上ばね受２６と
によって調節されること、一次通路６にはストレーナプ
ラグ４７に取付けたストレーナ４８が装入されているこ
とは実施例１と同じである。尚、本実施例では弁体１０
の案内棒１４を挿入した下ふた体１５の案内孔１６に閉
弁ばね１７を装入した。[Embodiment 4] FIGS. 6 and 7 show an embodiment of the second invention described in claims 4, 5, and 6, which cooperates with a valve seat 3 provided in a flow passage 2 of a valve body 1 to perform a primary operation. A piston 13 integrated via a valve body 10 and a valve body stem 11 for connecting or disconnecting the passage 6 and the secondary passage 8 forms a diaphragm 19 for detecting a secondary side fluid pressure.
A diaphragm stem 21 that is integral with the above is fitted together so as to move separately, and the spring force of an adjusting spring 28 inside the spring case 18 is adjusted by an adjusting screw 23 and an upper spring receiver 26. As in the first embodiment, a strainer 48 attached to a strainer plug 47 is inserted in the primary passage 6. In this embodiment, the valve body 10
The valve closing spring 17 was inserted into the guide hole 16 of the lower lid body 15 into which the guide rod 14 of FIG.

【００４１】本発明に係る側流路７１はストレーナ４８
の上流側で一次通路６を二次室７に連直させて設けられ
ている。また、流路切換え機構７２は一次通路６のスト
レーナ４８の入口に形成した流路弁口７３およびこれと
同一軸心上で対向させて側流路７１の入口に形成した側
流路弁口７４と、弁本体１に螺装固定した案内プラグ７
５のねじ孔７６に貫通螺装した弁軸７７およびその先端
に設けたプランジャ形弁体７８とからなる直動スプール
弁構造の三位置方向切換弁で構成されている。The side channel 71 according to the present invention is a strainer 48.
The primary passage 6 is connected to the secondary chamber 7 on the upstream side of the. The flow path switching mechanism 72 includes a flow path valve port 73 formed at the inlet of the strainer 48 of the primary path 6 and a side flow path valve port 74 formed at the inlet of the side flow path 71 so as to face the same on the same axis. And a guide plug 7 screwed and fixed to the valve body 1.
5 is composed of a valve shaft 77 threaded through the screw hole 76 of No. 5 and a plunger type valve body 78 provided at the tip of the valve shaft 77.

【００４２】このような側流路７１と流路切換機構７２
とを具えた本実施例の減圧弁を配管施工時に配管に組込
んで初期通水を行なうとき、弁軸７７の案内プラグ７５
からの突出端に工具を係合して回しながら弁軸７７を前
進させ、弁体７８を流路弁口７３にほぼ完全に嵌入して
ストレーナ４８の入口を閉鎖することにより一次通路６
を二次室７と弁座３を経ることなく側流路７１によって
連通する（図７のＡ）。このとき、初期通水が高圧であ
ってもダイヤフラム１９は弁体１０と別体に動き、弁体
１０は閉弁ばね１７のばね力によってのみ弁座３に接触
しているので喰付きを生じないばかりか、固形異物の当
り面への付着が防止される。Such a side channel 71 and a channel switching mechanism 72
The guide plug 75 of the valve shaft 77 is installed when the pressure reducing valve of this embodiment including
The valve shaft 77 is moved forward while the tool is engaged with the projecting end of the primary shaft 6 by rotating the valve shaft 78, and the valve body 78 is almost completely fitted into the flow path valve port 73 to close the inlet of the strainer 48.
Are communicated with the secondary chamber 7 by the side flow passage 71 without passing through the valve seat 3 (A in FIG. 7). At this time, even if the initial water flow is high, the diaphragm 19 moves separately from the valve body 10, and the valve body 10 is in contact with the valve seat 3 only by the spring force of the valve closing spring 17, so that biting occurs. Not only does it prevent solid foreign matter from adhering to the contact surface.

【００４３】内部清掃を終ったとき弁軸７７を前記の反
対方向へ回して後退させ、弁体７８を側流路弁口７４に
ほぼ完全に嵌入させることによって側流路７１を閉鎖
し、流体がストレーナ４８から一次室５、弁座口４、二
次室７へと流れる本来の減圧弁として働かせる（図７の
Ｂ）。When the internal cleaning is completed, the valve shaft 77 is rotated in the opposite direction to retreat, and the valve body 78 is almost completely fitted into the side flow passage valve port 74 to close the side flow passage 71. Acts as an original pressure reducing valve flowing from the strainer 48 to the primary chamber 5, the valve seat opening 4, and the secondary chamber 7 (B in FIG. 7).

【００４４】ストレーナ４８の清掃や交換、減圧弁自身
または他の機器の保守点検を行なうときは、弁体７８を
少し前進させて二つの弁口７３，７４の両方に嵌入して
これらを閉鎖することにより流体の流れを停止させる
（図７のＣ）。When the strainer 48 is to be cleaned or replaced, and the pressure reducing valve itself or other equipment is to be maintained and inspected, the valve body 78 is slightly advanced to fit into both the two valve openings 73 and 74 to close them. This stops the fluid flow (C in FIG. 7).

【００４５】この実施例によると、スプール弁構造の切
換弁をねじによって所定位置に固定する構成であるので
切換えと流路保持とが確実に行なわれる、という利点が
ある。According to this embodiment, since the switching valve having the spool valve structure is fixed to the predetermined position with the screw, there is an advantage that the switching and the flow passage are surely performed.

【００４６】[0046]

【実施例５】図８は請求項４，５，６に記載の第二発明
における流路切換機構の異なる実施例を示すものであっ
て、この流路切換機構８０は実施例４と同様に一次通路
６のストレーナ４８の入口に形成した流路弁座８１およ
びこれと同一軸心上で対向させて側流路７１の入口に形
成した側流路弁座８２と、弁本体１に螺装固定した案内
キャップ８３のねじ孔８４に貫通螺装した弁軸８５とを
具えているが、弁体部分が弁軸８５の一次通路６に突出
した先端部分の段部８５ａとストッパ８５ｂとの間に軸
心方向可動に嵌装支持された二つのディスク形の弁体８
６，８７およびそれらの間に嵌入した圧縮コイルばねか
らなる押ばね８８とからなる点で相違している。Fifth Embodiment FIG. 8 shows a different embodiment of the flow path switching mechanism according to the second aspect of the present invention as defined in claims 4, 5, and 6, and this flow path switching mechanism 80 is the same as that of the fourth embodiment. A flow passage valve seat 81 formed at the inlet of the strainer 48 of the primary passage 6 and a side flow passage valve seat 82 formed at the inlet of the side flow passage 71 so as to face the same on the same axis as the flow passage valve seat 81 are screwed to the valve body 1. Although the valve shaft 85 is threaded through the screw hole 84 of the fixed guide cap 83, the valve body portion is provided between the stepped portion 85a and the stopper 85b of the tip portion protruding into the primary passage 6 of the valve shaft 85. Two disc-shaped valve bodies 8 fitted and supported in the axially movable manner
6, 87 and a pressing spring 88 formed of a compression coil spring fitted between them, which is a difference.

【００４７】このような側流路７１と遊動弁構造の三位
置方向切換弁からなる流路切換機構８０とを具えた本実
施例の減圧弁を配管施工時に配管に組込んで初期通水を
行なうとき、弁軸８５の案内キャップ８３からの突出端
を指先でつまんで回しながら弁体８５を前進させ、先端
側の弁体８６を流路弁座８１に押し当てるとともに基端
側の弁体８７を段部８５ａで押ばね８８を圧縮しながら
弁体８６に接近させることにより、ストレーナ４８の入
口を閉鎖するとともに側流路７１を開放して一次通路６
と二次室７とを側流路７１により連通する（図８の
Ａ）。The pressure reducing valve of this embodiment having such a side flow passage 71 and a flow passage switching mechanism 80 consisting of a three-position directional switching valve having a floating valve structure is incorporated in the pipe at the time of construction of the pipe for initial water passage. When performing, the valve body 85 is advanced while pinching the protruding end of the valve shaft 85 from the guide cap 83 with a fingertip, and the valve body 86 on the front end side is pressed against the flow path valve seat 81 and the valve body on the base end side is pressed. By bringing 87 closer to the valve body 86 while compressing the pressing spring 88 at the stepped portion 85a, the inlet of the strainer 48 is closed and the side flow passage 71 is opened to open the primary passage 6
And the secondary chamber 7 are communicated with each other by the side channel 71 (A in FIG. 8).

【００４８】内部清掃を終ったとき弁軸８５を前記の反
対方向へ回して後退させ、先端側の弁体８６をストッパ
８５ｂで押して流路弁座８１から離すとともに基端側の
弁体８７を側流路弁座８２に押ばね８８の圧縮により押
し当てることによって側流路７１を閉鎖し、流体がスト
レーナ４８から一次室、弁座口を通って二次室７へと流
れる本来の減圧弁として働かせる（図８のＢ）。When the internal cleaning is completed, the valve shaft 85 is rotated in the opposite direction to retreat, the valve body 86 on the tip side is pushed by the stopper 85b to be separated from the flow path valve seat 81, and the valve body 87 on the base side is moved. The original pressure reducing valve that closes the side flow passage 71 by pressing it against the side flow passage valve seat 82 by the compression of the pressing spring 88, and causes the fluid to flow from the strainer 48 to the secondary chamber 7 through the primary chamber and the valve seat opening. Work as (B in Fig. 8).

【００４９】ストレーナ４８の清掃や交換、減圧弁自身
または他の機器の保守点検を行なうときは、弁軸８５を
少し前進させてストッパ８５ａ，段部８５ｂをそれぞれ
流路弁座８１，側流路弁座８２の内部に位置させること
により、これらに弁体８６，８７が押ばね８８のばね力
で押し当てられて閉鎖することとなり流体の流れを停止
させる（図８のＣ）。When the strainer 48 is cleaned or replaced, and the pressure reducing valve itself or other equipment is maintained and inspected, the valve shaft 85 is moved slightly forward so that the stopper 85a and the stepped portion 85b are respectively connected to the passage valve seat 81 and the side passage. By locating the valve element inside the valve seat 82, the valve elements 86 and 87 are pressed against them by the spring force of the pressing spring 88 to close them, and the flow of fluid is stopped (C in FIG. 8).

【００５０】この実施例によると、遊動弁構造の切換弁
をねじによって所定位置に固定する構成であるので切換
えと流路形成とが確実に行なわれるとともに、反対向き
の弁体８６，８７を押ばね８８によって対向する二つの
弁座８１，８２にそれぞれ押し当てる構成であるので流
路閉鎖が確実に行なわれる、という利点がある。According to this embodiment, since the switching valve having the floating valve structure is fixed to the predetermined position with the screw, the switching and the flow passage formation are surely performed, and the valve bodies 86 and 87 in the opposite directions are pushed. Since the spring 88 presses the two opposing valve seats 81 and 82 against each other, there is an advantage that the flow passage is reliably closed.

【００５１】[0051]

【実施例６】図９は請求項４，５，６に記載の第二発明
における流路切換機構の更に異なる実施例を示すもので
あって、一次通路６の図示しないストレーナの上流側で
一次通路６を二次室７に連通する側流路９０が設けら
れ、その分岐個所に設置された流路切換機構９１はボー
ル弁構造の三位置方向切換弁で構成されている。[Sixth Embodiment] FIG. 9 shows a further different embodiment of the flow path switching mechanism according to the second aspect of the present invention, wherein the primary passage 6 is provided upstream of a strainer (not shown). A side flow passage 90 that connects the passage 6 to the secondary chamber 7 is provided, and the flow passage switching mechanism 91 installed at the branching portion is formed of a three-position directional switching valve having a ball valve structure.

【００５２】このような側流路９０と流路切換機構９１
とを具えた本実施例の減圧弁を配管施工時に配管に組込
んで初期通水を行なうとき、手動で弁体９２を回転させ
てストレーナ入口側を閉鎖するとともにその弁通路９３
により一次通路６と側流路９０とを連通させる。また、
内部清掃を終ったとき図示の位置として側流路９０を閉
鎖し、流体がストレーナから一次室５、弁座口を通って
二次室７へと流れる本来の減圧弁として働かせる。更
に、ストレーナの清掃や交換、減圧弁自身または他の機
器の保守点検を行なうときは一次通路６の切換弁入口を
閉鎖することにより流体の流れを停止させる。Such a side channel 90 and a channel switching mechanism 91
When the pressure reducing valve of the present embodiment having the above is incorporated into the pipe at the time of installing the pipe for initial water passage, the valve body 92 is manually rotated to close the strainer inlet side and the valve passage 93 thereof.
Thus, the primary passage 6 and the side flow passage 90 are communicated with each other. Also,
When the internal cleaning is completed, the side flow passage 90 is closed at the position shown in the figure, and the fluid acts as an original pressure reducing valve that flows from the strainer to the secondary chamber 7 through the primary chamber 5 and the valve seat opening. Further, when cleaning or replacing the strainer, or performing maintenance and inspection of the pressure reducing valve itself or other equipment, the switching valve inlet of the primary passage 6 is closed to stop the fluid flow.

【００５３】この実施例によると、流路切換機構９１が
手動のボール弁構造であって回転させるだけで流路の開
閉と切換えができ、構成および操作がきわめて簡単であ
る。According to this embodiment, the flow path switching mechanism 91 has a manual ball valve structure, and the flow path can be opened and closed and switched simply by rotating it, and the construction and operation are extremely simple.

【００５４】尚、実施例５，６の側流路７１，９０およ
び流路切換機構８０，９１を具えた減圧弁本来の構造は
実施例４に示したものと同じである。The original structure of the pressure reducing valve including the side flow passages 71 and 90 and the flow passage switching mechanisms 80 and 91 of the fifth and sixth embodiments is the same as that shown in the fourth embodiment.

【００５５】[0055]

【実施例７】図１０，１１は請求項７，８，９に記載の
第三発明の実施例を示すもので、弁本体１の流路２に設
けた弁座３と協働して一次通路６と二次通路８とを連通
または遮断する弁体１０と弁体ステム１１を介して一体
のピストン１３が二次側流体圧力検知用のダイヤフラム
１９と一体のダイヤフラムステム２１と互いに嵌合して
別体に動くようになっていること、ばねケース１８の内
部の調節ばね２８のばね力が調節ねじ２３と上ばね受２
６とによって調節されること、一次通路６にはストレー
ナプラグ４７に取付けたストレーナ４８が嵌入されてい
るとともにその入口側に手動の閉止機構４０が配置され
ていることは実施例１と同じである。尚、図１０，１１
の図１，２と同一の個所には実施例１と同じ符号を付
し、その説明は省略する。[Embodiment 7] FIGS. 10 and 11 show an embodiment of the third invention described in claims 7, 8 and 9, in which the primary operation is performed in cooperation with the valve seat 3 provided in the flow passage 2 of the valve body 1. An integral piston 13 is fitted through a valve body 10 and a valve body stem 11 that connect or block the passage 6 and the secondary passage 8 to a diaphragm stem 21 that is integral with a diaphragm 19 for detecting a secondary side fluid pressure. The spring force of the adjusting spring 28 inside the spring case 18 is different from that of the adjusting screw 23 and the upper spring receiver 2.
6 and that the strainer 48 attached to the strainer plug 47 is fitted in the primary passage 6 and the manual closing mechanism 40 is arranged on the inlet side thereof as in the first embodiment. . Incidentally, FIGS.
The same parts as those in FIGS.

【００５６】本発明に係る側流路９４は閉止機構４０の
上流側で一次通路６を二次室７に連通させて設けられて
いる。また、手動の閉止機構９５は側流路９５の入口に
形成した側流路弁口９６と、この弁口９６に対向させて
弁本体１に貫通螺装した弁軸９７およびその先端に形成
され側流路弁口９６を塞ぐ側流路弁体９８とからなる構
成である。更に、この閉止機構９５を全開とした状態で
側流路弁口９６と側流路弁体９８との間に筒状のストレ
ーナ９９が設置されており、このストレーナ９９は側流
路弁体９８に取外し可能に装着されている。The side passage 94 according to the present invention is provided on the upstream side of the closing mechanism 40 so that the primary passage 6 communicates with the secondary chamber 7. Further, the manual closing mechanism 95 is formed at the side flow passage valve port 96 formed at the inlet of the side flow passage 95, the valve shaft 97 which is screwed through the valve body 1 so as to face the valve port 96, and the tip thereof. This is a configuration including a side flow passage valve body 98 that closes the side flow passage valve port 96. Further, a cylindrical strainer 99 is installed between the side flow passage valve port 96 and the side flow passage valve body 98 with the closing mechanism 95 fully opened, and the strainer 99 has the side flow passage valve body 98. It is detachably attached to.

【００５７】このようなストレーナ４８，９９，閉止機
構４０，９５，側流路９４を具えた本実施例の減圧弁を
配管施工時に配管に組込んで初期通水を行なうとき、一
次通路６の閉止機構４０のねじ杆４３を回して閉止弁体
４４を弁口４１に嵌入し一次通路６を閉鎖するものであ
り、内部清掃用の水は側流路弁口９６からストレーナ９
９を通って側流路９４から二次室７へ流れる。When the pressure reducing valve of this embodiment having the strainers 48, 99, the closing mechanisms 40, 95, and the side flow passages 94 is installed in the pipes at the time of construction of the pipes for initial water passage, the primary passages 6 are The screw rod 43 of the closing mechanism 40 is turned to fit the closing valve body 44 into the valve opening 41 to close the primary passage 6, and the water for internal cleaning is supplied from the side passage valve opening 96 to the strainer 9
Flows through the side channel 94 to the secondary chamber 7 through 9.

【００５８】内部清掃を終ったとき側流路９４の閉止機
構９５の弁軸９７を回してストレーナ９９と一緒に弁本
体１から抜取り、ストレーナ９９を外して再び弁本体１
に螺装して側流路弁体９８を側流路弁口９６に密着させ
ることにより側流路９４を閉鎖するとともに、ねじ杆４
３を前記の反対方向へ回して閉止弁体４４を弁口４１か
ら離して一次通路６を開放することにより、流体がスト
レーナ４８から一次室５、弁座口４、二次室７へと流れ
る本来の減圧弁として働かせる。When the internal cleaning is completed, the valve shaft 97 of the closing mechanism 95 of the side flow path 94 is rotated to remove it together with the strainer 99 from the valve body 1, the strainer 99 is removed, and the valve body 1 is again removed.
The side flow path valve body 98 is screwed onto the side flow path valve port 96 to close the side flow path valve 94, and the side flow path 94 is closed.
The fluid flows from the strainer 48 to the primary chamber 5, the valve seat 4, and the secondary chamber 7 by rotating 3 in the opposite direction to separate the closing valve element 44 from the valve opening 41 and open the primary passage 6. It works as an original pressure reducing valve.

【００５９】ストレーナ４８の清掃や交換、減圧弁自身
または他の機器の保守点検を行なうときはねじ杆４３を
ねじ込んで一次通路６を閉鎖し流体の流れを停止させ
る。When the strainer 48 is to be cleaned or replaced, and the pressure reducing valve itself or other equipment is to be maintained and inspected, the screw rod 43 is screwed in to close the primary passage 6 and stop the fluid flow.

【００６０】この実施例によると、施工完了時の内部清
掃のための初期通水を行なった後は不用となる側流路９
４を専用の閉止機構９５で閉鎖し、部品の清掃や交換或
いは保守点検を行なうため一次通路６を一次的に閉鎖す
る専用の閉止機構４０を別に設けたので、誤操作の心配
なく流路の開閉と切換えが行なえる、という利点があ
る。また、側流路９４にストレーナ９９を設けたことに
より上流から運ばれる固形異物が除去され、弁座３や弁
体１０に付着するという心配が完全になくなり、更に図
示のようにストレーナ９９と弁軸９７とを縦に配置し上
向きの弁軸９７に中空部９７ａを設けると、固形異物が
この中空部９７ａに落下してストレーナ９９を目詰まり
させる、という心配がなくなる。According to this embodiment, the side flow passage 9 is unnecessary after the initial water flow for cleaning the interior at the completion of construction.
4 is closed by a dedicated closing mechanism 95, and a dedicated closing mechanism 40 for temporarily closing the primary passage 6 for cleaning, replacement or maintenance / inspection of the parts is additionally provided, so that the flow passage can be opened and closed without the risk of erroneous operation. There is an advantage that can be switched. Further, by providing the strainer 99 in the side flow path 94, solid foreign matter carried from the upstream is removed, and there is no fear of sticking to the valve seat 3 or the valve body 10. Further, as shown in the drawing, the strainer 99 and the valve When the shaft 97 and the valve 97 are arranged vertically and the hollow portion 97a is provided in the upward valve shaft 97, there is no fear that solid foreign matter will drop into the hollow portion 97a and clog the strainer 99.

【００６１】尚、前記各実施例は減圧弁に対して強制開
弁機構３１，５０，６４，閉止機構４０，９５，流路切
換機構７２，８０，９１を設けたものであるが、減圧定
流量弁、定流量弁に設けて同じ目的を達成させることが
できる。また、前記各実施例は一次通路６にストレーナ
４８を具えているが、これを具えていないものにも閉止
機構４０を設置して目的を達成させることができる。In each of the above embodiments, the pressure reducing valve is provided with the forced opening mechanisms 31, 50, 64, the closing mechanisms 40, 95, and the flow path switching mechanisms 72, 80, 91. The same purpose can be achieved by providing the flow valve and the constant flow valve. Further, in each of the above-described embodiments, the strainer 48 is provided in the primary passage 6, but the closing mechanism 40 can be installed even in a device without the strainer 48 to achieve the purpose.

【００６２】[0062]

【発明の効果】以上の説明から明かなように、手動の強
制開弁機構によって弁体を開弁位置に固定するか、また
は弁座をバイパスする側流路を開くことによって、配管
施工完了後の内部清掃用初期通水を弁座などに固形異物
を引掛からせることなく行なうことが可能となり、この
ため代用管が不要となって配管工事の簡単化、工費節
減、工期短縮が計れるものである。As is clear from the above description, the valve body is fixed at the valve open position by the manual forced valve opening mechanism, or the side flow passage that bypasses the valve seat is opened so that the pipe construction is completed. It is possible to perform the initial water flow for internal cleaning of the valve without trapping solid foreign matter on the valve seat, etc. Therefore, a substitute pipe is not required, which simplifies the piping work, saves the construction cost, and shortens the construction period. is there.

【００６３】また、正規の流路と側流路とを流路切換機
構または閉止機構でともに閉鎖することにより配管内機
器の清掃や部品交換、保守点検を行なうことが可能とな
り、このため通水停止のための止水栓が不要となって配
管構造簡単化、設備費用低減が計れるものであって、殊
に集合住宅の戸別給水、給湯設備など多数個が設置され
る配管系に有利である。Further, by closing both the regular flow passage and the side flow passage by the flow passage switching mechanism or the closing mechanism, it becomes possible to clean the equipment in the pipe, replace the parts, and perform maintenance and inspection. It is possible to simplify the piping structure and reduce the equipment cost by eliminating the need for a water stopper for stopping, and it is particularly advantageous for a piping system where multiple units such as water supply for each house and hot water supply in an apartment house are installed. .

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

【図１】第一発明の実施例の縦断面図。FIG. 1 is a vertical sectional view of an embodiment of the first invention.

【図２】図１の横断面図。2 is a cross-sectional view of FIG.

【図３】図１の実施例の強制開弁時の縦断面図。FIG. 3 is a vertical cross-sectional view of the embodiment of FIG. 1 at the time of forced valve opening.

【図４】第一発明の異なる実施例であって、Ａは強制開
弁時、Ｂは通常使用時の縦断面部分図。FIG. 4 is a vertical sectional partial view showing a different embodiment of the first invention, in which A is forcibly opened and B is for normal use.

【図５】第一発明の更に異なる実施例であって、Ａは強
制開弁時、Ｂは通常使用時の縦断面部分図。FIG. 5 is a vertical sectional partial view showing a further different embodiment of the first invention, in which A is forcibly opened and B is for normal use.

【図６】第二発明の実施例の縦断面図。FIG. 6 is a vertical sectional view of an embodiment of the second invention.

【図７】図６の実施例の流路切換え機構の動作を説明す
る横断面部分図。7 is a partial cross-sectional view for explaining the operation of the flow path switching mechanism of the embodiment of FIG.

【図８】第二発明における流路切換機構の異なる実施例
の動作を説明する横断面部分図。FIG. 8 is a partial cross-sectional view for explaining the operation of a different embodiment of the flow path switching mechanism in the second invention.

【図９】第二発明における流路切換機構の更に異なる実
施例の縦断面部分図。FIG. 9 is a partial vertical cross-sectional view of a further different embodiment of the flow path switching mechanism in the second invention.

【図１０】第三発明の実施例の縦断面図。FIG. 10 is a vertical sectional view of an embodiment of the third invention.

【図１１】図１０の横断面部分図。11 is a partial cross-sectional view of FIG.

【図１２】従来の配管の一例の配置図。FIG. 12 is a layout diagram of an example of conventional piping.

【符号の説明】[Explanation of symbols]

１ 弁本体， ２ 流路， ３ 弁座， ６ 一次通
路， ８ 二次通路，１０ 弁体， １９ ダイヤフラ
ム， ３１，５０，６４ 強制開弁機構， ４０，９５
閉止機構， ４８，９９ ストレーナ， ７１，９
０，９４ 側流路，７２，８０，９１ 流路切換機構，1 valve body, 2 flow paths, 3 valve seats, 6 primary passages, 8 secondary passages, 10 valve bodies, 19 diaphragms, 31, 50, 64 forced valve opening mechanism, 40, 95
Closing mechanism, 48,99 strainer, 71,9
0,94 side flow path, 72,80,91 flow path switching mechanism,

フロントページの続き (72)発明者 北川 明博 東京都大田区多摩川２丁目２番13号株式会 社ベン内 (72)発明者 加藤 文隆 福島県いわき市好間工業団地13番１株式会 社ベンいわき技術センター内 (72)発明者 佐々木 実 福島県いわき市好間工業団地13番１株式会 社ベンいわき技術センター内 (72)発明者 北田 隆 福島県いわき市好間工業団地13番１株式会 社ベンいわき技術センター内Continued Front Page (72) Inventor Akihiro Kitagawa 2-21-13 Tamagawa, Ota-ku, Tokyo Ben Corporation (72) Inventor Fumitaka Kato 13-1 Yoshima Industrial Park, Iwaki, Fukushima Ben Iwaki Inside the Technology Center (72) Inventor Minoru Sasaki 13-1 Stock Company, Yoshima Industrial Park, Iwaki City, Fukushima Ben In the Iwaki Technology Center (72) Inventor Takashi Kitada 13-1 Stock Company, Iwaki City, Fukushima Prefecture Ben Iwaki Technical Center

Claims (9)

【特許請求の範囲】[Claims] 【請求項１】 流体の入口から出口に至る流路に設けた
弁座と、二次側流体圧力とこれに対抗する荷重との差に
応じて作動する弁体とを具え、前記弁座と弁体とが協働
して流体の圧力、流量を制御する流体制御弁において、
前記弁体を開弁位置に保持する手動の強制開弁機構を具
えたことを特徴とする流体制御弁。1. A valve seat, which is provided in a flow path from an inlet to an outlet of a fluid, and a valve body which operates in response to a difference between a secondary side fluid pressure and a load against the secondary side fluid pressure. In a fluid control valve that cooperates with a valve body to control the pressure and flow rate of fluid,
A fluid control valve comprising a manual forced valve opening mechanism for holding the valve element in a valve opening position. 【請求項２】 請求項１の記載の構成に加えて、前記流
路の一次側に流路を閉止する手動の閉止機構を具えたこ
とを特徴とする流体制御弁。2. The fluid control valve according to claim 1, further comprising a manual closing mechanism for closing the flow passage on the primary side of the flow passage. 【請求項３】 請求項１記載の構成に加えて、前記流路
の一次側にストレーナおよびその入口側に配置されて流
路を閉止する手動の閉止機構を具えたことを特徴とする
流体制御弁。3. The fluid control system according to claim 1, further comprising a strainer on the primary side of the flow passage and a manual closing mechanism arranged on the inlet side of the flow passage to close the flow passage. valve. 【請求項４】 流体の入口から出口に至る流路に設けた
弁座と、二次側流体圧力とこれに対抗する荷重との差に
応じて作動する弁体とを具え、前記弁座と弁体とが協働
して流体の圧力、流量を制御する流体制御弁において、
前記流路の一次側と二次側とを前記弁座を通ることなく
接続する側流路と、前記一次側と二次側とを前記弁座と
側流路のいずれかを経由して連通させる手動の流路切換
機構とを具えたことを特徴とする流体制御弁。4. A valve seat, which is provided in a flow path from a fluid inlet to an outlet, and a valve body which operates in accordance with a difference between a secondary side fluid pressure and a load against the secondary side fluid pressure. In a fluid control valve that cooperates with a valve body to control the pressure and flow rate of fluid,
A side flow passage that connects the primary side and the secondary side of the flow passage without passing through the valve seat, and communicates the primary side and the secondary side via either the valve seat or the side flow passage. A fluid control valve comprising a manual flow path switching mechanism for controlling the fluid flow. 【請求項５】 流路切換機構が三位置方向切換弁である
請求項４記載の流体制御弁。5. The fluid control valve according to claim 4, wherein the flow path switching mechanism is a three-position directional switching valve. 【請求項６】 請求項４，５いずれか記載の構成に加え
て、前記流路の一次側にストレーナを具え、前記流路切
換機構を前記ストレーナの入口側に配置させたことを特
徴とする流体制御弁。6. In addition to the structure according to any one of claims 4 and 5, a strainer is provided on the primary side of the flow passage, and the flow passage switching mechanism is arranged on the inlet side of the strainer. Fluid control valve. 【請求項７】 流体の入口から出口に至る流路に設けた
弁座と、二次側流体圧力とこれに対抗する荷重との差に
応じて作動する弁体とを具え、前記弁座と弁体とが協働
して流体の圧力、流量を制御する流体制御弁において、
前記流路の一次側と二次側とを前記弁座を通ることなく
接続する側流路と、前記流路の一次側および側流路をそ
れぞれ各別に閉止する手動の閉止機構とを具えたことを
特徴とする流体制御弁。7. A valve seat provided in a flow path from a fluid inlet to an outlet, and a valve element that operates in response to a difference between a secondary side fluid pressure and a load against the secondary side fluid pressure. In a fluid control valve that cooperates with a valve body to control the pressure and flow rate of fluid,
A side flow passage that connects the primary side and the secondary side of the flow passage without passing through the valve seat, and a manual closing mechanism that individually closes the primary side and the side flow passage of the flow passage, respectively. A fluid control valve characterized in that 【請求項８】 請求項６記載の構成に加えて、前記流路
の一次側にストレーナを具え、前記一次側の閉止機構を
前記ストレーナの入口側に配置させたことを特徴とする
流体制御弁。8. The fluid control valve according to claim 6, further comprising a strainer on the primary side of the flow passage, and the closing mechanism on the primary side is arranged on the inlet side of the strainer. . 【請求項９】 請求項６，７いずれか記載の構成に加え
て、前記側流路にストレーナを具えたことを特徴とする
流体制御弁。9. A fluid control valve according to any one of claims 6 and 7, further comprising a strainer in the side flow passage.