JP6738683B2 - Temporary valve fixing structure - Google Patents

Temporary valve fixing structure Download PDF

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JP6738683B2
JP6738683B2 JP2016156042A JP2016156042A JP6738683B2 JP 6738683 B2 JP6738683 B2 JP 6738683B2 JP 2016156042 A JP2016156042 A JP 2016156042A JP 2016156042 A JP2016156042 A JP 2016156042A JP 6738683 B2 JP6738683 B2 JP 6738683B2
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valve
valve rod
temporary fixing
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opening
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馬場　俊明
俊明 馬場
卓也 本郷
卓也 本郷
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Kubota Corp
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Description

本発明は、例えばバタフライ弁等の開閉用作動機を弁棒から取り外して開閉用作動機のメンテナンスを行う際に、弁棒を一時的に仮に固定するための仮固定構造に関する。 The present invention relates to a temporary fixing structure for temporarily temporarily fixing a valve stem when the opening/closing actuator such as a butterfly valve is removed from the valve stem to perform maintenance of the opening/closing actuator .

従来、図４０に示すように、バタフライ弁１５０の弁棒１５１の一端部には操作機１５２が設けられ、操作機１５２は、入力軸１５３と、入力軸１５３に入力された回転を減速して弁棒１５１に出力する減速用歯車機構１５４とを有している。 Conventionally, as shown in FIG. 40, an operating unit 152 is provided at one end of a valve rod 151 of a butterfly valve 150, and the operating unit 152 decelerates the input shaft 153 and the rotation input to the input shaft 153. And a reduction gear mechanism 154 for outputting to the valve rod 151.

Ｔ形状の操作ハンドル１５５を入力軸１５３に嵌合し、操作ハンドル１５５を回すことにより、入力軸１５３が回転し、入力軸１５３の回転が減速用歯車機構１５４で減速されて弁棒１５１に伝えられ、弁棒１５１が軸心周りに回動し、弁体１５６が回動して弁箱１５７内の流路を開閉する。 By fitting the T-shaped operation handle 155 to the input shaft 153 and turning the operation handle 155, the input shaft 153 rotates, and the rotation of the input shaft 153 is reduced by the reduction gear mechanism 154 and transmitted to the valve rod 151. Then, the valve rod 151 rotates around the axis, and the valve body 156 rotates to open and close the flow path in the valve box 157.

通常、弁体１５６は開状態又は閉状態で停止しており、このときの弁体１５６は弁棒１５１を介して操作機１５２によって拘束されているため、管路内に水が流れている場合（通水状態の場合）や水圧が負荷されている場合であっても、弁体１５６が不用意に回動することはない。 Normally, the valve body 156 is stopped in the open state or the closed state, and the valve body 156 at this time is restrained by the operating device 152 via the valve rod 151, so that water flows in the pipeline. The valve body 156 does not rotate carelessly (in a water-passing state) or when water pressure is applied.

しかしながら、操作機１５２のメンテナンスを行う場合、操作機１５２を弁棒１５１から取り外すと、弁体１５６の拘束が解除されてしまうので、弁体１５６が不用意に回動して、ウォーターハンマー等が発生する虞があった。このため、操作機１５２を弁棒１５１に取り付けたままでメンテナンスを行う必要があり、メンテナンス作業に多大な手間と時間を要するといった問題があった。 However, when performing maintenance on the operating device 152, if the operating device 152 is removed from the valve rod 151, the restraint of the valve body 156 is released, so the valve body 156 rotates carelessly and a water hammer or the like is removed. There was a risk of this occurring. For this reason, it is necessary to perform maintenance with the operating device 152 attached to the valve rod 151, and there is a problem that the maintenance work requires a great deal of labor and time.

上記問題の対策として、図４１に示すように、弁体１５６を全開位置および全閉位置に仮に固定する仮固定部材１６１を、弁箱１５７のボス部１６２と操作機１５２との間に設けたものがある。仮固定部材１６１は、円環状の部材であり、直径方向において互いに直交する第１固定孔１６４と第２固定孔（図示省略）とを有している。また、弁棒１５１の一端部には、直径方向に貫通する貫通孔１６６が形成されている。 As a measure against the above problem, as shown in FIG. 41, a temporary fixing member 161 for temporarily fixing the valve body 156 to the fully open position and the fully closed position is provided between the boss 162 of the valve box 157 and the operating device 152. There is something. The temporary fixing member 161 is an annular member, and has a first fixing hole 164 and a second fixing hole (not shown) that are orthogonal to each other in the diametrical direction. Further, a through hole 166 penetrating in the diameter direction is formed at one end of the valve rod 151.

これによると、弁体１５６が全開位置まで回動した場合、第１固定孔１６４と貫通孔１６６とが一直線上に配置されて連通するため、固定用棒１６７を第１固定孔１６４と貫通孔１６６とに挿通することにより、弁体１５６が全開位置で仮に固定される。 According to this, when the valve body 156 is rotated to the fully open position, the first fixing hole 164 and the through hole 166 are arranged and communicate with each other, so that the fixing rod 167 is connected to the first fixing hole 164 and the through hole. The valve body 156 is temporarily fixed at the fully opened position by inserting the valve body 166 into the valve body 166.

また、弁体１５６が全閉位置まで回動した場合、第２固定孔と貫通孔１６６とが一直線上に配置されて連通するため、固定用棒１６７を第２固定孔と貫通孔１６６とに挿通することにより、弁体１５６が全閉位置で仮に固定される。 Further, when the valve body 156 is rotated to the fully closed position, the second fixing hole and the through hole 166 are arranged and communicate with each other in a straight line, so that the fixing rod 167 is connected to the second fixing hole and the through hole 166. By inserting the valve body 156, the valve body 156 is temporarily fixed at the fully closed position.

このように弁体１５６を全開位置又は全閉位置で仮に固定した状態で、操作機１５２を弁棒１５１から取り外し、操作機１５２のメンテナンスを行うことができる。これにより、操作機１５２のメンテナンス作業の手間と時間を大幅に縮小することができるとともに、弁体１５６が不用意に回動することはなく、ウォーターハンマー等の発生を防止することができる。 Thus, with the valve body 156 temporarily fixed in the fully open position or the fully closed position, the operating device 152 can be removed from the valve rod 151 to perform maintenance of the operating device 152. As a result, the labor and time required for the maintenance work of the operating device 152 can be significantly reduced, and the valve body 156 can be prevented from rotating carelessly and the occurrence of a water hammer or the like can be prevented.

尚、上記のような仮固定部材を備えたバタフライ弁は例えば下記特許文献１に記載されている。 A butterfly valve provided with the temporary fixing member as described above is described in, for example, Patent Document 1 below.

特開２０１６−８４８２５JP, 2016-84825, A

しかしながら上記の従来形式では、仮固定部材１６１は弁箱１５７のボス部１６２と操作機１５２との間に設けられ、弁棒１５１が仮固定部材１６１を貫通して操作機１５２に接続されているため、仮固定部材１６１の高さＨに応じて弁棒１５１を長くする必要があり、その分、バタフライ弁１５０が全体的に大型化して重量も増加するといった問題がある。 However, in the above-described conventional type, the temporary fixing member 161 is provided between the boss portion 162 of the valve box 157 and the operating device 152, and the valve rod 151 penetrates the temporary fixing member 161 and is connected to the operating device 152. Therefore, it is necessary to lengthen the valve rod 151 according to the height H of the temporary fixing member 161, and there is a problem that the butterfly valve 150 becomes large in size and increases in weight accordingly.

本発明は、弁を小型軽量化できる弁棒の仮固定構造を目的とする。 An object of the present invention is to provide a temporary fixing structure for a valve rod that can reduce the size and weight of a valve.

上記目的を達成するために、本第１発明は、弁体が弁棒と一体に回動して弁箱内の流路を開閉し、
弁棒の一端部に、弁棒を回動させる開閉用作動機が着脱自在に設けられ、
弁棒の他端部が弁箱に形成された棒孔に回動自在に挿入された弁の弁棒を仮に固定する仮固定構造であって、
弁棒は、弁体に設けられた弁棒本体と、弁棒本体の他端部に設けられた調節部材とを有し、
調節部材は、弁棒本体の位置を軸心方向において調節するものであって、弁棒本体と一体に回動自在であり、
弁棒を回動方向において拘束する拘束手段が凸部と凹部とを有し、
凸部は弁箱に着脱自在に取り付けられて棒孔の開口部を外側から閉じる仮固定用カバー部材に設けられ、
凹部は調節部材に設けられ、
凸部と凹部とが弁棒の軸心方向において嵌脱自在であるものである。 In order to achieve the above object, the first aspect of the present invention is such that a valve body rotates integrally with a valve rod to open and close a flow path in a valve box,
An opening/closing actuator for rotating the valve rod is detachably provided at one end of the valve rod,
A temporary fixing structure for temporarily fixing the valve rod of the valve, the other end of which is rotatably inserted into a rod hole formed in the valve box,
The valve rod has a valve rod main body provided on the valve body and an adjusting member provided on the other end of the valve rod main body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
The restraint means for restraining the valve rod in the rotating direction has a convex portion and a concave portion,
The convex portion is detachably attached to the valve box and provided on the temporary fixing cover member that closes the opening of the rod hole from the outside.
The recess is provided in the adjustment member,
The convex portion and the concave portion can be freely inserted and removed in the axial direction of the valve rod .

これによると、仮固定用カバー部材を弁箱に取り付けることにより、凸部が凹部に嵌合し、調節部材が拘束手段によって回動方向において拘束され、調節部材を介して弁棒本体も回動方向において拘束される。この状態で、開閉用作動機を弁棒から取り外し、開閉用作動機のメンテナンスを行うことができる。この際、弁体が不用意に回動することはなく、ウォーターハンマー等の発生を防止することができる。 According to this, when the temporary fixing cover member is attached to the valve box, the convex portion fits into the concave portion, the adjusting member is restrained in the rotating direction by the restraining means, and the valve rod body also rotates through the adjusting member. Constrained in direction. In this state, the opening/closing actuator can be removed from the valve rod to perform maintenance of the opening/closing actuator. At this time, the valve body does not rotate carelessly, and the occurrence of a water hammer or the like can be prevented.

また、凹部が弁棒の調節部材に設けられているとともに、凸部が仮固定用カバー部材に設けられているため、拘束手段に応じて弁棒を長くする必要はなく、これにより弁を小型軽量化することができる。 Further, since the concave portion is provided on the valve rod adjusting member and the convex portion is provided on the temporary fixing cover member, it is not necessary to lengthen the valve rod according to the restraint means, and thus the valve can be made compact. The weight can be reduced.

本第２発明は、弁体が弁棒と一体に回動して弁箱内の流路を開閉し、
弁棒の一端部に、弁棒を回動させる開閉用作動機が着脱自在に設けられ、
弁棒の他端部が弁箱に形成された棒孔に回動自在に挿入された弁の弁棒を仮に固定する仮固定構造であって、
弁棒は、弁体に設けられた弁棒本体と、弁棒本体の他端部に着脱自在に設けられた調節部材とを有し、
調節部材は、弁棒本体の位置を軸心方向において調節するものであって、弁棒本体と一体に回動自在であり、
弁棒を回動方向において拘束する拘束手段が凸部と凹部とを有し、
凸部は弁箱に着脱自在に取り付けられて棒孔の開口部を外側から閉じる仮固定用カバー部材に設けられ、
凹部は弁棒本体の他端部に設けられ、
凸部と凹部とが弁棒の軸心方向において嵌脱自在であるものである。 In the second aspect of the invention, the valve body rotates integrally with the valve rod to open and close the flow path in the valve box,
An opening/closing actuator for rotating the valve rod is detachably provided at one end of the valve rod,
A temporary fixing structure for temporarily fixing the valve rod of the valve, the other end of which is rotatably inserted into a rod hole formed in the valve box,
The valve rod has a valve rod body provided on the valve body, and an adjusting member detachably provided on the other end of the valve rod body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
The restraint means for restraining the valve rod in the rotating direction has a convex portion and a concave portion,
The convex portion is detachably attached to the valve box and provided on the temporary fixing cover member that closes the opening of the rod hole from the outside.
The recess is provided at the other end of the valve stem body,
The convex portion and the concave portion can be freely inserted and removed in the axial direction of the valve rod .

これによると、調節部材を弁棒本体の他端部から取り外し、仮固定用カバー部材を弁箱に取り付けることにより、凸部が凹部に嵌合し、弁棒本体が拘束手段によって回動方向において拘束される。 According to this, by removing the adjusting member from the other end of the valve stem body and attaching the temporary fixing cover member to the valve box, the convex portion fits into the concave portion, and the valve stem body is rotated in the rotating direction by the restraining means. Be detained.

また、凹部が弁棒本体に設けられているとともに、凸部が仮固定用カバー部材に設けられているため、拘束手段に応じて弁棒を長くする必要はなく、これにより弁を小型軽量化することができる。 Further, since the concave portion is provided on the valve rod main body and the convex portion is provided on the temporary fixing cover member, it is not necessary to lengthen the valve rod according to the restraint means, thereby making the valve compact and lightweight. can do.

本第３発明における弁棒の仮固定構造は、仮固定用カバー部材は、凸部と凹部とが嵌合する拘束姿勢と、凸部と凹部とが離間する非拘束姿勢との表裏逆向きの姿勢で弁箱に取付可能であるものである。 In the temporary fixing structure for a valve rod according to the third aspect of the present invention, the temporary fixing cover member has a restrained posture in which the convex portion and the concave portion are fitted and a non-restrained posture in which the convex portion and the concave portion are separated from each other, and the front and back sides are opposite to each other. It can be attached to the valve box in a posture.

これによると、仮固定用カバー部材を拘束姿勢で弁箱に取り付けることにより、凸部が凹部に嵌合し、弁棒が回動方向において拘束される。このようにして弁棒を拘束した状態で、開閉用作動機を弁棒の一端部から取り外し、開閉用作動機のメンテナンスを行った後、開閉用作動機を弁棒の一端部に設ける。これにより、弁棒が開閉用作動機によって回動方向において拘束される。 According to this, when the temporary fixing cover member is attached to the valve box in the restraining posture, the convex portion fits into the concave portion, and the valve rod is restrained in the rotating direction. In this way, with the valve rod restrained, the opening/closing actuator is removed from one end of the valve rod, and after the maintenance of the opening/closing actuator, the opening/closing actuator is provided at one end of the valve rod. As a result, the valve rod is restrained in the rotating direction by the opening/closing actuator.

その後、仮固定用カバー部材を、一旦、弁箱から取り外し、表裏を逆向きにした後、非拘束姿勢で弁箱に取り付ける。これにより、凸部と凹部とが離間し、仮固定構造による弁棒の拘束が解除されるため、開閉用作動機を作動させることによって、弁棒を弁体と共に軸心周りに回動させ、弁体の開度を変えることができる。 After that, the temporary fixing cover member is once removed from the valve box, the front and back are reversed, and then attached to the valve box in a non-constrained posture. As a result, the convex portion and the concave portion are separated from each other, and the restraint of the valve rod by the temporary fixing structure is released.Therefore, by operating the opening/closing actuator, the valve rod is rotated around the axial center together with the valve body, The opening of the valve body can be changed.

以上のように本発明によると、弁棒が拘束手段によって回動方向において拘束されるため、弁棒が仮に（一時的に）固定され、この状態で、開閉用作動機を弁棒から取り外し、開閉用作動機のメンテナンスを行うことができる。この際、弁体が不用意に回動することはなく、ウォーターハンマー等の発生を防止することができる。 As described above, according to the present invention, since the valve stem is restrained in the rotation direction by the restraining means, the valve stem is temporarily (temporarily) fixed, and in this state, the opening/closing actuator is removed from the valve stem. Maintenance of the opening/closing actuator can be performed. At this time, the valve body does not rotate carelessly, and the occurrence of a water hammer or the like can be prevented.

また、仮固定用カバー部材を弁箱に取り付けることにより、弁棒が拘束手段によって回動方向において拘束され、これにより、弁棒が仮に（一時的に）固定され、この状態で、開閉用作動機を弁棒から取り外し、開閉用作動機のメンテナンスを行うことができる。 Further, by attaching the temporary fixing cover member to the valve box, the valve rod is restrained in the rotating direction by the restraining means, so that the valve rod is temporarily (temporarily) fixed, and in this state, the opening/closing operation is performed. The motive can be removed from the valve stem to maintain the opening/closing actuator.

また、拘束手段が弁棒の他端部と仮固定用カバー部材とに備えられているため、拘束手段に応じて弁棒を長くする必要はなく、これにより弁を小型軽量化することができる。 Further, since the restraint means is provided on the other end portion of the valve rod and the temporary fixing cover member, it is not necessary to lengthen the valve stem according to the restraint means, whereby the valve can be made smaller and lighter. ..

本発明の第１の実施の形態におけるバタフライ弁の断面図であって、通常運転時における全閉状態を示す。It is a sectional view of the butterfly valve in a 1st embodiment of the present invention, and shows a fully closed state at the time of normal operation. 図１におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁の通常運転時における第２弁棒の他端部とカバー部材との一部拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of the other end of the second valve rod and the cover member during normal operation of the butterfly valve. 同、バタフライ弁の第２弁棒の図である。FIG. 3 is a view of a second valve stem of the butterfly valve of the same. 図４におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁の断面図であって、仮固定用カバー部材を取り付けて、拘束手段で弁棒を拘束している状態を示す。FIG. 3 is a sectional view of the butterfly valve, showing a state in which a temporary fixing cover member is attached and the valve rod is restrained by the restraining means. 同、バタフライ弁に仮固定用カバー部材を取り付けたときの第２弁棒の他端部と仮固定用カバー部材との一部拡大断面図である。FIG. 7 is a partially enlarged cross-sectional view of the other end of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve. 同、バタフライ弁に取り付けられる仮固定用カバー部材の正面図である。FIG. 3 is a front view of the temporary fixing cover member attached to the butterfly valve. 図８におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 本発明の第２の実施の形態におけるバタフライ弁の第２弁棒の図である。It is a figure of the 2nd valve stem of the butterfly valve in a 2nd embodiment of the present invention. 図１０におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁に取り付けられる仮固定用カバー部材の正面図である。FIG. 3 is a front view of the temporary fixing cover member attached to the butterfly valve. 図１２におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁の断面図であって、仮固定用カバー部材を取り付けて、拘束手段で弁棒を拘束している状態を示す。FIG. 3 is a sectional view of the butterfly valve, showing a state in which a temporary fixing cover member is attached and the valve rod is restrained by the restraining means. 同、バタフライ弁に仮固定用カバー部材を取り付けたときの第２弁棒の他端部と仮固定用カバー部材との一部拡大断面図である。FIG. 7 is a partially enlarged cross-sectional view of the other end of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve. 本発明の第３の実施の形態におけるバタフライ弁に仮固定用カバー部材を拘束姿勢で取り付けたときの第２弁棒の他端部と仮固定用カバー部材との一部拡大断面図である。It is a partially expanded sectional view of the other end portion of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve in the restrained posture in the third embodiment of the present invention. 同、バタフライ弁に仮固定用カバー部材を非拘束姿勢で取り付けたときの第２弁棒の他端部と仮固定用カバー部材との一部拡大断面図である。FIG. 6 is a partially enlarged cross-sectional view of the other end of the second valve rod and the temporary fixing cover member when the temporary fixing cover member is attached to the butterfly valve in a non-constrained posture. 本発明の第４の実施の形態におけるバタフライ弁の断面図であって、通常運転時における全閉状態を示す。It is sectional drawing of the butterfly valve in the 4th Embodiment of this invention, Comprising: It shows a fully closed state at the time of normal operation. 同、バタフライ弁の通常運転時における第２弁棒の他端部とカバー部材と調節部材との一部拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of the other end of the second valve rod, the cover member, and the adjusting member during normal operation of the butterfly valve. 同、バタフライ弁の調節部材の調節板の正面図である。FIG. 4 is a front view of the adjusting plate of the adjusting member of the butterfly valve of the same. 図２０におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁の第２弁棒の他端面の図である。FIG. 5 is a view of the other end surface of the second valve rod of the butterfly valve of the same. 図２２におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 図２２におけるＹ−Ｙ矢視図である。It is a YY arrow line view in FIG. 同、バタフライ弁に通常運転時において取り付けられるカバー部材の正面図である。FIG. 5 is a front view of the cover member attached to the butterfly valve during normal operation. 図２５におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁のカバー部材と調節部材とを取り外し、バタフライ弁に仮固定用カバー部材を取り付けたときの第２弁棒の他端部と仮固定用カバー部材との一部拡大断面図である。FIG. 6 is a partially enlarged cross-sectional view of the other end of the second valve rod and the temporary fixing cover member when the cover member and the adjusting member of the butterfly valve are removed and the temporary fixing cover member is attached to the butterfly valve. .. 同、バタフライ弁に取り付けられる仮固定用カバー部材の正面図である。FIG. 3 is a front view of the temporary fixing cover member attached to the butterfly valve. 図２８におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 本発明の第５の実施の形態におけるバタフライ弁に取り付けられる仮固定用カバー部材の正面図である。It is a front view of a temporary fixing cover member attached to a butterfly valve in a 5th embodiment of the present invention. 図３０におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁のカバー部材を取り外し、バタフライ弁に仮固定用カバー部材を取り付けたときの第２弁棒の他端部と仮固定用カバー部材と調節部材との一部拡大断面図である。FIG. 5 is a partially enlarged cross-sectional view of the other end of the second valve rod, the temporary fixing cover member, and the adjusting member when the cover member of the butterfly valve is removed and the temporary fixing cover member is attached to the butterfly valve. 本発明の第６の実施の形態におけるバタフライ弁の一部拡大断面図であり、ギヤ式の拘束手段で弁棒を拘束した状態を示す。It is a partial expanded sectional view of the butterfly valve in a 6th embodiment of the present invention, and shows the state where a valve stem was restrained by gear type restraining means. 同、バタフライ弁の弁棒を拘束する拘束手段の外歯車の正面図である。FIG. 3 is a front view of the external gear of the restraint means that restrains the valve stem of the butterfly valve. 図３４におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁に取り付けられる仮固定用カバー部材の正面図である。FIG. 3 is a front view of the temporary fixing cover member attached to the butterfly valve. 図３６におけるＸ−Ｘ矢視図である。It is a XX arrow line view in FIG. 同、バタフライ弁の一部拡大断面図であり、外歯車を取り外して、弁棒の拘束を解除した状態を示す。FIG. 3 is a partially enlarged sectional view of the butterfly valve, showing a state in which the external gear is removed and the restraint of the valve rod is released. 本発明の第７の実施の形態におけるバタフライ弁の一部拡大断面図であり、拘束手段で弁棒を拘束している状態を示す。It is a partial expanded sectional view of the butterfly valve in the 7th Embodiment of this invention, and shows the state which has restrained the valve stem by the restraint means. 従来のバタフライ弁の操作機部分の拡大図である。It is an enlarged view of the operation machine part of the conventional butterfly valve. 従来の仮固定部材を備えたバタフライ弁の操作機部分の拡大断面図である。It is an expanded sectional view of the operation machine part of the butterfly valve provided with the conventional temporary fixing member.

以下、本発明における実施の形態を、図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（第１の実施の形態）
第１の実施の形態では、図１〜図３に示すように、１はバタフライ弁（弁の一例）であり、円筒状の弁箱２内に円盤状の弁体３が設けられ、弁体３が、弁棒４と一体に弁棒４の軸心周りに回動して、弁箱２内の流路５を開閉する。弁箱２の流入出口にはそれぞれ管路６が接続されている。 (First embodiment)
In the first embodiment, as shown in FIGS. 1 to 3, 1 is a butterfly valve (an example of a valve), a disc-shaped valve body 3 is provided in a cylindrical valve body 2, and a valve body is provided. 3 rotates integrally with the valve rod 4 around the axis of the valve rod 4 to open and close the flow path 5 in the valve box 2. Pipe lines 6 are connected to the inflow and outflow ports of the valve box 2, respectively.

弁棒４は、開閉用操作機７（開閉用作動機の一例）が接続されている駆動側の第１弁棒８と、開閉用操作機７が接続されていない非駆動側の第２弁棒９とに２分割されている。第１および第２弁棒８，９はそれぞれ弁体３に一体的に取り付けられている。 The valve rod 4 includes a drive-side first valve rod 8 to which an opening/closing operating device 7 (an example of an opening/closing actuator) is connected, and a non-driving-side second valve to which the opening/closing operating device 7 is not connected. It is divided into two, a rod 9 and a rod 9. The first and second valve rods 8 and 9 are integrally attached to the valve body 3.

弁箱２は第１ボス部１０と第２ボス部１１とを有している。第１ボス部１０には、弁箱２の内外に貫通する第１棒孔１２が形成され、第２ボス部１１には、弁箱２の内外に貫通する第２棒孔１３が形成されている。 The valve box 2 has a first boss portion 10 and a second boss portion 11. The first boss portion 10 is formed with a first rod hole 12 penetrating inside and outside the valve box 2, and the second boss portion 11 is formed with a second rod hole 13 penetrating inside and outside the valve box 2. There is.

弁棒４の一端部すなわち第１弁棒８が第１棒孔１２に回動自在に挿入され、弁棒４の他端部すなわち第２弁棒９が第２棒孔１３に回動自在に挿入されている。また、弁棒４の一端部すなわち第１弁棒８には、弁棒４を軸心周りに回動させる開閉用操作機７が接続されている。開閉用操作機７は、第１ボス部１０に、ボルト，ナット１４等を介して着脱自在に取り付けられており、回転自在なハンドル１５と、ハンドル１５の回転を減速して第１弁棒８に伝える減速機１６とを有している。 One end of the valve rod 4, that is, the first valve rod 8 is rotatably inserted into the first rod hole 12, and the other end of the valve rod 4, that is, the second valve rod 9 is rotatably inserted into the second rod hole 13. Has been inserted. Further, an opening/closing operating device 7 for rotating the valve rod 4 about its axis is connected to one end of the valve rod 4, that is, the first valve rod 8. The opening/closing operating device 7 is detachably attached to the first boss portion 10 via bolts, nuts 14 and the like, and has a rotatable handle 15 and the first valve rod 8 for decelerating the rotation of the handle 15. And a speed reducer 16 which is transmitted to

第１弁棒８の外周面と第１棒孔１２の内周面との間はＯリング等のシール部材１７でシールされている。また、第２弁棒９の外周面と第２棒孔１３の内周面との間はＯリング等のシール部材２９でシールされている。 The outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first rod hole 12 are sealed by a seal member 17 such as an O-ring. A seal member 29 such as an O-ring is provided between the outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second rod hole 13.

第２棒孔１３の開口部１３ａを外側から閉じるカバー部材２０が第２ボス部１１に着脱自在に取り付けられている。カバー部材２０は、円板状の部材であり、複数本のボルト等の連結具２１によって第２ボス部１１に取り付けられている。これら連結具２１は例えば９０°おきに４本設けられている。 The cover member 20 that closes the opening 13a of the second rod hole 13 from the outside is detachably attached to the second boss 11. The cover member 20 is a disk-shaped member and is attached to the second boss portion 11 by a connecting tool 21 such as a plurality of bolts. For example, four connecting tools 21 are provided at every 90°.

カバー部材２０にはシール溝２２が全周にわたり形成され、シール溝２２にＯリング等の円環状のシール部材２３が嵌め込まれている。シール部材２３によって、第２ボス部１１とカバー部材２０との接合部分がシールされている。 A seal groove 22 is formed over the entire circumference of the cover member 20, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22. The joint portion between the second boss portion 11 and the cover member 20 is sealed by the seal member 23.

図１，図３〜図５に示すように、弁棒４の他端部すなわち第２弁棒９の他端部には、弁棒４を回動方向において拘束するための溝部２５（凹部および第１拘束手段の一例）が直径方向にわたって一直線状に形成されている。 As shown in FIGS. 1 and 3 to 5, the other end portion of the valve rod 4, that is, the other end portion of the second valve rod 9 is provided with a groove portion 25 (recessed portion and An example of the first restraint means) is formed in a straight line over the diameter direction.

通常運転時においては、図１，図２に示すように、開閉用操作機７のハンドル１５を回すことにより、減速機１６がハンドル１５の回転を減速して第１弁棒８に伝え、第１弁棒８と第２弁棒９と弁体３とが一体に弁棒４の軸心周りに回動し、弁箱２内の流路５が開閉される。これにより、弁体３が全閉位置又は全開位置或いは全閉位置と全開位置との間の任意の開度に切り換えられ、この状態で、第１弁棒８が開閉用操作機７によって回動方向において拘束されるため、弁体３が不用意に開閉方向へ回動するのを防止することができる。 During normal operation, as shown in FIGS. 1 and 2, by rotating the handle 15 of the opening/closing operating device 7, the speed reducer 16 decelerates the rotation of the handle 15 and transmits it to the first valve stem 8. The 1st valve stem 8, the 2nd valve stem 9, and the valve body 3 rotate integrally around the axis of the valve stem 4, and the flow path 5 in the valve box 2 is opened and closed. As a result, the valve body 3 is switched to the fully closed position, the fully open position, or an arbitrary opening degree between the fully closed position and the fully open position, and in this state, the first valve rod 8 is rotated by the opening/closing operation device 7. Since the valve body 3 is constrained in the direction, it is possible to prevent the valve body 3 from inadvertently rotating in the opening/closing direction.

また、開閉用操作機７のメンテナンス（保守点検）を行う場合は、図１の仮想線で示すように、カバー部材２０を第２ボス部１１から取り外し、その代わりに、図６，図７に示すように、仮固定用カバー部材３１を第２ボス部１１に取り付ける。 Further, when performing maintenance (maintenance inspection) of the opening/closing operating device 7, the cover member 20 is removed from the second boss portion 11 as shown by the phantom line in FIG. 1, and instead, as shown in FIGS. As shown, the temporary fixing cover member 31 is attached to the second boss portion 11.

仮固定用カバー部材３１は、上記カバー部材２０と同様に、第２棒孔１３の開口部１３ａを外側から閉じる円板状の部材であり、上記連結具２１によって第２ボス部１１に着脱自在に取り付けられている。図８，図９に示すように、仮固定用カバー部材３１には、弁棒４を回動方向において拘束するための突片部３２（凸部および第２拘束手段の一例）が形成されている。突片部３２は、弁棒４の軸心方向において、第２弁棒９の溝部２５に嵌脱自在である。尚、溝部２５と突片部３２とで、弁棒４を回動方向において拘束する拘束手段が構成される。 Like the cover member 20, the temporary fixing cover member 31 is a disk-shaped member that closes the opening 13a of the second rod hole 13 from the outside, and is detachably attached to the second boss 11 by the connecting tool 21. Is attached to. As shown in FIGS. 8 and 9, the temporary fixing cover member 31 is provided with a protruding piece portion 32 (an example of a convex portion and a second restraining means) for restraining the valve rod 4 in the rotation direction. There is. The protruding piece portion 32 can be inserted into and removed from the groove portion 25 of the second valve rod 9 in the axial direction of the valve rod 4. The groove 25 and the protrusion 32 constitute a restraining means for restraining the valve rod 4 in the rotating direction.

また、仮固定用カバー部材３１にはシール溝２２が全周にわたり形成され、シール溝２２にＯリング等の円環状のシール部材２３が嵌め込まれている。 Further, the temporary fixing cover member 31 is formed with a seal groove 22 over the entire circumference thereof, and an annular seal member 23 such as an O ring is fitted into the seal groove 22.

以下に、開閉用操作機７のメンテナンスを行う際の手順を説明する。 Below, the procedure at the time of performing maintenance of the operating device 7 for opening and closing is demonstrated.

管路６に通水した状態で、開閉用操作機７のハンドル１５を回して弁体３を全閉位置にし、図１の仮想線で示すように、連結具２１を外して、カバー部材２０を第２ボス部１１から取り外し、その後、図６，図７に示すように、連結具２１を用いて、仮固定用カバー部材３１を第２ボス部１１に取り付ける。この際、仮固定用カバー部材３１の突片部３２を第２弁棒９の溝部２５に嵌合することにより、弁棒４（第１および第２弁棒８，９）が拘束手段（溝部２５および突片部３２）によって回動方向において拘束される。これにより、弁棒４が仮に（一時的に）固定され、この状態で、図６に示すように、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。この際、弁棒４が回動方向において拘束されているため、弁体３が不用意に全閉位置から開方向へ回動することはなく、ウォーターハンマー等の発生を防止することができる。 With the water flowing through the pipe line 6, the handle 15 of the opening/closing operating device 7 is turned to bring the valve element 3 to the fully closed position, and as shown by the phantom line in FIG. Is removed from the second boss portion 11, and then the temporary fixing cover member 31 is attached to the second boss portion 11 using the connecting tool 21, as shown in FIGS. 6 and 7. At this time, by fitting the protruding piece portion 32 of the temporary fixing cover member 31 into the groove portion 25 of the second valve rod 9, the valve rod 4 (first and second valve rods 8 and 9) is restraining means (the groove portion). 25 and the protrusion 32) are restrained in the rotational direction. Thereby, the valve rod 4 is temporarily (temporarily) fixed, and in this state, as shown in FIG. 6, the opening/closing operating device 7 is detached from the first boss portion 10 to be detached from the first valve rod 8. The maintenance of the opening/closing operating device 7 can be performed. At this time, since the valve rod 4 is restrained in the rotating direction, the valve body 3 does not carelessly rotate from the fully closed position to the opening direction, and the occurrence of a water hammer or the like can be prevented.

また、拘束手段を構成する溝部２５と突片部３２とのうち、溝部２５が第２弁棒９に備えられ、突片部３２が仮固定用カバー部材３１に備えられているため、拘束手段に応じて弁棒４を長くする必要はなく、これによりバタフライ弁１を小型軽量化することができる。 Further, among the groove portion 25 and the protruding piece portion 32 that form the restraining means, the groove portion 25 is provided in the second valve rod 9 and the protruding piece portion 32 is provided in the temporary fixing cover member 31, so that the restraining means is provided. Therefore, it is not necessary to lengthen the valve rod 4, and the butterfly valve 1 can be reduced in size and weight.

開閉用操作機７のメンテナンスを行った後、開閉用操作機７を第１ボス部１０に取り付けて第１弁棒８に接続し、これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。 After the maintenance of the opening/closing operating device 7, the opening/closing operating device 7 is attached to the first boss portion 10 and connected to the first valve rod 8, whereby the valve rod 4 is rotated by the opening/closing operating device 7. Constrained in direction.

その後、図６の仮想線で示すように、連結具２１を外して、仮固定用カバー部材３１を第２ボス部１１から取り外し、その後、図１の実線で示すように、連結具２１を用いて、カバー部材２０を第２ボス部１１に取り付ける。これにより、仮固定用カバー部材３１による弁棒４の拘束が解除されるため、開閉用操作機７のハンドル１５を回すことによって、弁棒４を弁体３と共に回動させ、弁体３の開度を変えることができる。 After that, as shown by the phantom line in FIG. 6, the connecting tool 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and thereafter, as shown by the solid line in FIG. Then, the cover member 20 is attached to the second boss portion 11. As a result, the restraint of the valve rod 4 by the temporary fixing cover member 31 is released. Therefore, by rotating the handle 15 of the opening/closing operating device 7, the valve rod 4 is rotated together with the valve body 3 and the valve body 3 is rotated. The opening can be changed.

上記第１の実施の形態では、開閉用操作機７のメンテナンスを行う際、弁体３を全閉位置にして、弁棒４を拘束しているが、弁体３を全開位置にして、弁棒４を拘束してもよい。尚、このように弁体３を全開位置にした場合の溝部２５の向きは、弁体３を全閉位置にした場合に比べて、弁棒４の回動方向に９０°ずれている。従って、弁体３を全開位置にして弁棒４を拘束する場合は、弁体３を全閉位置にして弁棒４を拘束する場合に比べて、仮固定用カバー部材３１を弁棒４の回動方向に９０°ずらした状態で第２ボス部１１に取り付ければよい。これにより、仮固定用カバー部材３１の突片部３２が、第２弁棒９の溝部２５と同方向になって、溝部２５に嵌合する。 In the first embodiment described above, when performing maintenance on the opening/closing operating device 7, the valve body 3 is in the fully closed position and the valve rod 4 is restrained, but the valve body 3 is in the fully open position and the valve is opened. The rod 4 may be restrained. The direction of the groove 25 when the valve body 3 is in the fully open position in this way is deviated by 90° in the rotational direction of the valve rod 4 compared to when the valve body 3 is in the fully closed position. Therefore, when the valve body 3 is fully opened and the valve stem 4 is restrained, the temporary fixing cover member 31 is attached to the valve stem 4 more than when the valve body 3 is fully closed and the valve stem 4 is restrained. It may be attached to the second boss portion 11 in a state of being displaced by 90° in the rotating direction. As a result, the protruding piece portion 32 of the temporary fixing cover member 31 is fitted in the groove portion 25 in the same direction as the groove portion 25 of the second valve rod 9.

上記第１の実施の形態では、第２弁棒９の他端部に溝部２５を設け、仮固定用カバー部材３１に突片部３２を設けたが、第２弁棒９の他端部に突片部３２を設け、仮固定用カバー部材３１に溝部２５を設けてもよい。 In the first embodiment, the groove 25 is provided at the other end of the second valve rod 9 and the protruding piece 32 is provided at the temporary fixing cover member 31, but the other end of the second valve rod 9 is provided. The protrusion 32 may be provided, and the groove 25 may be provided in the temporary fixing cover member 31.

（第２の実施の形態）
第２の実施の形態では、図１０，図１１に示すように、第２弁棒９の他端部には、弁棒４を回動方向において拘束するための複数個の孔部４０（凹部および第１拘束手段の一例）が形成されている。これら孔部４０は弁棒４の回動方向において例えば９０°おきに４個配設されている。 (Second embodiment)
In the second embodiment, as shown in FIGS. 10 and 11, at the other end of the second valve rod 9, a plurality of holes 40 (recesses) for restraining the valve rod 4 in the rotation direction are formed. And an example of the first restraint means). Four of these hole portions 40 are arranged, for example, at every 90° in the rotating direction of the valve rod 4.

また、図１２，図１３に示すように、仮固定用カバー部材３１には、弁棒４を回動方向において拘束するための複数本のピン４２（凸部および第２拘束手段の一例）が形成されている。これらピン４２は、弁棒４の回動方向において例えば９０°おきに４本配設されており、弁棒４の軸心方向において、孔部４０に嵌脱自在である。尚、孔部４０とピン４２とで、弁棒４を回動方向において拘束する拘束手段が構成される。 Further, as shown in FIGS. 12 and 13, the temporary fixing cover member 31 is provided with a plurality of pins 42 (an example of a convex portion and a second restraint means) for restraining the valve rod 4 in the rotation direction. Has been formed. Four of these pins 42 are arranged, for example, every 90° in the rotation direction of the valve rod 4, and can be inserted into and removed from the hole 40 in the axial direction of the valve rod 4. The hole 40 and the pin 42 constitute a restraint means that restrains the valve rod 4 in the rotation direction.

以下に、開閉用操作機７のメンテナンスを行う際の手順を説明する。 Below, the procedure at the time of performing maintenance of the operating device 7 for opening and closing is demonstrated.

弁体３を全閉位置にした状態で、第１の実施の形態と同様にカバー部材２０を第２ボス部１１から取り外し（図１の仮想線参照）、その後、図１４，図１５に示すように、仮固定用カバー部材３１を第２ボス部１１に取り付ける。この際、仮固定用カバー部材３１の各ピン４２を第２弁棒９の各孔部４０に嵌合することにより、弁棒４（第１および第２弁棒８，９）が拘束手段（孔部４０およびピン４２）によって回動方向において拘束される。これにより、弁棒４が仮に固定され、この状態で、図１４に示すように、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。 With the valve body 3 in the fully closed position, the cover member 20 is removed from the second boss portion 11 (see the phantom line in FIG. 1) as in the first embodiment, and then shown in FIGS. 14 and 15. As described above, the temporary fixing cover member 31 is attached to the second boss portion 11. At this time, by fitting each pin 42 of the temporary fixing cover member 31 into each hole 40 of the second valve rod 9, the valve rod 4 (first and second valve rods 8 and 9) is restraining means ( It is restrained in the rotation direction by the hole 40 and the pin 42). As a result, the valve rod 4 is temporarily fixed, and in this state, the opening/closing operating device 7 is detached from the first boss portion 10 and separated from the first valve rod 8 as shown in FIG. Can be maintained.

上記第２の実施の形態では、開閉用操作機７のメンテナンスを行う際、弁体３を全閉位置にして、弁棒４を拘束しているが、弁体３を全開位置にして、弁棒４を拘束してもよい。 In the second embodiment, when performing maintenance of the opening/closing operating device 7, the valve body 3 is in the fully closed position and the valve rod 4 is constrained, but the valve body 3 is in the fully open position and the valve is opened. The rod 4 may be restrained.

上記第２の実施の形態では、第２弁棒９の他端部に孔部４０を設け、仮固定用カバー部材３１にピン４２を設けたが、第２弁棒９の他端部にピン４２を設け、仮固定用カバー部材３１に孔部４０を設けてもよい。 In the second embodiment, the hole 40 is provided at the other end of the second valve rod 9 and the pin 42 is provided at the temporary fixing cover member 31, but the pin 42 is provided at the other end of the second valve rod 9. 42 may be provided, and the hole 40 may be provided in the temporary fixing cover member 31.

（第３の実施の形態）
第３の実施の形態は、先述した第１の実施の形態の変形例であって、図１６，図１７に示すように、仮固定用カバー部材４８は、突片部３２が溝部２５に嵌合する拘束姿勢と、突片部３２が溝部２５から離間する非拘束姿勢との表裏逆向きの姿勢で、連結具２１を用いて第２ボス部１１に取付可能である。 (Third Embodiment)
The third embodiment is a modification of the above-described first embodiment, and as shown in FIGS. 16 and 17, in the temporary fixing cover member 48, the protruding piece portion 32 is fitted in the groove portion 25. It can be attached to the second boss portion 11 by using the connecting tool 21 in a posture in which the restraining posture to be fitted and a non-constraining posture in which the projecting piece portion 32 is separated from the groove portion 25 are opposite to each other.

尚、シール溝２２は仮固定用カバー部材４８の表裏両面にそれぞれ形成されており、両シール溝２２にそれぞれシール部材２３が嵌め込まれている。 The seal grooves 22 are formed on both front and back surfaces of the temporary fixing cover member 48, and the seal members 23 are fitted in the seal grooves 22.

以下、上記構成における作用を説明する。 The operation of the above configuration will be described below.

通常運転時において、図１７に示すように、仮固定用カバー部材４８を非拘束姿勢にして第２ボス部１１に取り付けておく。これにより、突片部３２が外側に向いて溝部２５から離間しているため、弁棒４が回動方向において拘束されず、開閉用操作機７のハンドル１５を回すことにより、第１弁棒８と第２弁棒９と弁体３とが一体に弁棒４の軸心周りに回動し、弁箱２内の流路５が開閉される。 At the time of normal operation, as shown in FIG. 17, the temporary fixing cover member 48 is attached to the second boss portion 11 in an unrestrained posture. As a result, the protruding piece portion 32 faces the outside and is separated from the groove portion 25, so that the valve rod 4 is not restrained in the rotation direction, and the handle 15 of the opening/closing operating device 7 is rotated to cause the first valve rod portion to rotate. 8, the second valve rod 9 and the valve body 3 rotate integrally around the axis of the valve rod 4, and the flow path 5 in the valve box 2 is opened and closed.

開閉用操作機７のメンテナンスを行う際は、弁体３を全閉位置にした状態で、連結具２１を外して、仮固定用カバー部材４８を、第２ボス部１１から取り外し、表裏を逆向きにした後、図１６に示すように、拘束姿勢で第２ボス部１１に取り付ける。これにより、突片部３２が溝部２５に嵌合し、弁棒４が回動方向において拘束される。このようにして弁棒４を拘束した状態で、開閉用操作機７を第１弁棒８から取り外し、開閉用操作機７のメンテナンスを行った後、開閉用操作機７を第１弁棒８に設ける。これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。 When performing maintenance of the opening/closing operating device 7, with the valve body 3 in the fully closed position, the connecting tool 21 is removed, the temporary fixing cover member 48 is removed from the second boss portion 11, and the front and back are reversed. After being oriented, as shown in FIG. 16, it is attached to the second boss portion 11 in a restrained posture. As a result, the protruding piece portion 32 fits in the groove portion 25, and the valve rod 4 is restrained in the rotating direction. In this way, with the valve rod 4 restrained, the opening/closing operating device 7 is removed from the first valve rod 8 and the opening/closing operating device 7 is maintained. To be installed. As a result, the valve rod 4 is restrained in the turning direction by the opening/closing operating device 7.

その後、連結具２１を外して、仮固定用カバー部材４８を、第２ボス部１１から取り外し、表裏を逆向きにした後、図１７に示すように、非拘束姿勢で第２ボス部１１に取り付ける。これにより、突片部３２が溝部２５から離間し、弁棒４の拘束が解除されるため、開閉用操作機７のハンドル１５を回すことによって、弁棒４を弁体３と共に軸心周りに回動させ、弁体３の開度を変えることができる。 After that, the connecting tool 21 is removed, the temporary fixing cover member 48 is removed from the second boss portion 11, and the front and back sides are reversed. Then, as shown in FIG. Install. As a result, the protruding piece 32 is separated from the groove 25, and the restraint of the valve rod 4 is released. Therefore, by turning the handle 15 of the opening/closing operating device 7, the valve rod 4 is moved around the axial center together with the valve body 3. The opening degree of the valve body 3 can be changed by rotating the valve body 3.

上記第３の実施の形態では、先述した第１の実施の形態における突片部３２と溝部２５とを有する拘束手段を用いたが、第２の実施の形態（図１５参照）におけるピン４２と孔部４０とを有する拘束手段を用いてもよい。 In the third embodiment described above, the restraint means having the projecting piece portion 32 and the groove portion 25 in the first embodiment described above is used, but the pin 42 in the second embodiment (see FIG. 15) is used. You may use the restraint means which has the hole part 40.

（第４の実施の形態）
第４の実施の形態は、図１８，図１９に示すように、弁棒４は、弁体３に一体に設けられた弁棒本体２７と、弁棒本体２７の他端部に着脱自在に設けられた調節部材２８とを有している。弁棒本体２７が第１弁棒８と第２弁棒９とに２分割されている。 (Fourth Embodiment)
In the fourth embodiment, as shown in FIGS. 18 and 19, the valve rod 4 is detachably attached to the valve rod main body 27 integrally provided on the valve body 3 and the other end of the valve rod main body 27. The adjusting member 28 is provided. The valve stem body 27 is divided into a first valve stem 8 and a second valve stem 9.

第１弁棒８の外周面と第１棒孔１２の内周面との間には円筒状の第１ハウジング１８が設けられている。第１弁棒８の外周面と第１ハウジング１８の内周面との間および第１ハウジング１８の外周面と第１棒孔１２の内周面との間はそれぞれ、Ｏリング等のシール部材（図示省略）でシールされている。 A cylindrical first housing 18 is provided between the outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first rod hole 12. A seal member such as an O-ring is provided between the outer peripheral surface of the first valve rod 8 and the inner peripheral surface of the first housing 18, and between the outer peripheral surface of the first housing 18 and the inner peripheral surface of the first rod hole 12, respectively. It is sealed (not shown).

第２弁棒９の外周面と第２棒孔１３の内周面との間には円筒状の第２ハウジング１９が設けられている。第２弁棒９の外周面と第２ハウジング１９の内周面との間はＯリング等のシール部材（図示省略）でシールされており、第２ハウジング１９の外周面と第２棒孔１３の内周面との間はＯリング等のシール部材３０でシールされている。 A cylindrical second housing 19 is provided between the outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second rod hole 13. The outer peripheral surface of the second valve rod 9 and the inner peripheral surface of the second housing 19 are sealed by a seal member (not shown) such as an O-ring, and the outer peripheral surface of the second housing 19 and the second rod hole 13 are sealed. A seal member 30 such as an O-ring is used to seal a gap between the inner peripheral surface and the inner peripheral surface.

調節部材２８は、弁棒本体２７の位置を軸心方向Ａにおいて調節するものであって、弁棒本体２７と一体に回動自在である。すなわち、調節部材２８は、第２弁棒９とカバー部材２０との間に設けられた円形状の調節板５３と、調節板５３を第２弁棒９に連結する調節ボルト５４およびナット５５とを有している。 The adjusting member 28 adjusts the position of the valve stem body 27 in the axial direction A, and is rotatable integrally with the valve stem body 27. That is, the adjusting member 28 includes a circular adjusting plate 53 provided between the second valve rod 9 and the cover member 20, an adjusting bolt 54 and a nut 55 that connect the adjusting plate 53 to the second valve rod 9. have.

図２０，図２１に示すように、調節板５３には、中央部に貫通孔５６が形成され、貫通孔５６の周囲に複数個の孔部５７が形成されている。調節ボルト５４は貫通孔５６に挿通されて第２弁棒９に螺合されている。尚、孔部５７は例えば４５°おきに８個配設されている。 As shown in FIGS. 20 and 21, a through hole 56 is formed in the central portion of the adjusting plate 53, and a plurality of hole portions 57 are formed around the through hole 56. The adjusting bolt 54 is inserted into the through hole 56 and screwed to the second valve rod 9. Eight holes 57 are provided, for example, every 45°.

図２２〜図２４に示すように、弁棒４の他端部すなわち第２弁棒９の他端部には、弁棒４を回動方向において拘束するための溝部２５（凹部および第１拘束手段の一例）が直径方向にわたって一直線状に形成されている。さらに、第２弁棒９の他端部における径方向中心部には、溝部２５と連通している円形状の没入部５８が形成されている。 As shown in FIGS. 22 to 24, at the other end portion of the valve rod 4, that is, the other end portion of the second valve rod 9, a groove portion 25 (recessed portion and first restraint) for restraining the valve rod 4 in the rotation direction. (An example of means) is formed in a straight line in the diametrical direction. Further, a circular recess 58 communicating with the groove 25 is formed at the center of the other end of the second valve rod 9 in the radial direction.

図１９に示すように、ナット５５は調節ボルト５４に螺合されて没入部５８内に収められており、調節板５３は調節ボルト５４の頭部とナット５５との間に挟まれている。第２弁棒９の他端部には、複数本（図１９，図２２では２本）の止めねじ５９が設けられて突出しており、これら両止めねじ５９が調節板５３のいずれか２個の孔部５７に挿入されている。これにより、調節板５３は、止めねじ５９を介して、第２弁棒９と一体に、軸心周りに回動自在となっている。 As shown in FIG. 19, the nut 55 is screwed into the adjusting bolt 54 and is housed in the recess 58, and the adjusting plate 53 is sandwiched between the head of the adjusting bolt 54 and the nut 55. A plurality of (two in FIG. 19 and FIG. 22) setscrews 59 are provided and protrude at the other end of the second valve rod 9, and these two setscrews 59 are included in any two of the adjustment plates 53. Is inserted into the hole 57 of the. As a result, the adjusting plate 53 is rotatable around the shaft center integrally with the second valve rod 9 via the set screw 59.

図１９，図２５，図２６に示すように、第２棒孔１３の開口部１３ａを外側から閉じるカバー部材２０が第２ボス部１１に着脱自在に取り付けられている。カバー部材２０は、円板状の部材であり、複数本（図２５では４本）のボルト等の連結具２１によって第２ボス部１１に取り付けられている。 As shown in FIGS. 19, 25, and 26, a cover member 20 that closes the opening 13a of the second rod hole 13 from the outside is detachably attached to the second boss 11. The cover member 20 is a disk-shaped member, and is attached to the second boss portion 11 by a plurality of (four in FIG. 25) connecting members 21 such as bolts.

カバー部材２０にはシール溝２２が全周にわたり形成され、シール溝２２にＯリング等の円環状のシール部材２３が嵌め込まれている。シール部材２３によって、第２ボス部１１とカバー部材２０との接合部分がシールされている。また、カバー部材２０の内面には
円形状の没入部２４が形成されており、調節ボルト５４の頭部が没入部２４内に収められている。 A seal groove 22 is formed over the entire circumference of the cover member 20, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22. The joint portion between the second boss portion 11 and the cover member 20 is sealed by the seal member 23. A circular recess 24 is formed on the inner surface of the cover member 20, and the head of the adjusting bolt 54 is housed in the recess 24.

調節板５３とカバー部材２０との間および調節板５３と第２ボス部１１との間にはそれぞれ、円環状のシートからなるスラスト受け部材６０が設けられている。 A thrust receiving member 60 made of an annular sheet is provided between the adjusting plate 53 and the cover member 20 and between the adjusting plate 53 and the second boss portion 11, respectively.

通常運転時においては、図１８に示すように、開閉用操作機７のハンドル１５を回すことにより、減速機１６がハンドル１５の回転を減速して第１弁棒８に伝え、第１弁棒８と第２弁棒９と調節部材２８と弁体３とが一体に弁棒４の軸心周りに回動し、弁箱２内の流路５が開閉される。 During normal operation, as shown in FIG. 18, by turning the handle 15 of the opening/closing operating device 7, the speed reducer 16 decelerates the rotation of the handle 15 and transmits it to the first valve rod 8 and the first valve rod 8. 8, the second valve rod 9, the adjusting member 28, and the valve body 3 are integrally rotated around the axis of the valve rod 4, and the flow path 5 in the valve box 2 is opened and closed.

また、図１９の仮想線で示すように、連結具２１を外して、カバー部材２０を第２ボス部１１から取り外し、調節ボルト５４とナット５５を回すことによって、弁棒本体２７が軸心方向Ａに移動し、弁棒本体２７の位置を軸心方向Ａにおいて調節することができる。例えば、調節ボルト５４を一方向に回して第２弁棒９に締め込んだ場合、弁棒本体２７が調節板５３に接近する方向へ移動し、反対に、調節ボルト５４を他方向に回した場合、弁棒本体２７が調節板５３から遠ざかる方向へ移動する。 Further, as shown by the phantom line in FIG. 19, the connector 21 is removed, the cover member 20 is removed from the second boss portion 11, and the adjustment bolt 54 and the nut 55 are turned so that the valve rod main body 27 moves in the axial direction. By moving to A, the position of the valve stem body 27 can be adjusted in the axial direction A. For example, when the adjusting bolt 54 is turned in one direction and tightened into the second valve rod 9, the valve rod main body 27 moves in a direction approaching the adjusting plate 53, and conversely, the adjusting bolt 54 is turned in the other direction. In this case, the valve stem body 27 moves in a direction away from the adjusting plate 53.

これにより、弁棒本体２７と共に弁体３が軸心方向Ａに移動するため、軸心方向Ａにおいて、弁箱シートに対する弁体シートの位置を調節することができる。 As a result, the valve body 3 moves in the axial direction A together with the valve stem body 27, so that the position of the valve body seat with respect to the valve box seat in the axial direction A can be adjusted.

また、開閉用操作機７のメンテナンスを行う場合は、カバー部材２０を第２ボス部１１から取り外し、調節部材２８を取り外し、その代わりに、図２７に示すように、仮固定用カバー部材３１を第２ボス部１１に取り付ける。 Further, when performing maintenance of the opening/closing operating device 7, the cover member 20 is removed from the second boss portion 11, the adjusting member 28 is removed, and instead, the temporary fixing cover member 31 is provided as shown in FIG. It is attached to the second boss 11.

図２７〜図２９に示すように、仮固定用カバー部材３１は、上記カバー部材２０と同様に、第２棒孔１３の開口部１３ａを外側から閉じる円板状の部材であり、内面に没入部２４を有し、上記連結具２１によって第２ボス部１１に着脱自在に取り付けられている。仮固定用カバー部材３１には、弁棒４を回動方向において拘束するための突片部３２（凸部および第２拘束手段の一例）が形成されている。突片部３２は、弁棒４の軸心方向Ａにおいて第２弁棒９の溝部２５に嵌脱自在であり、没入部２４において径方向に２つに分断されている。尚、溝部２５と突片部３２とで、弁棒４を回動方向において拘束する拘束手段が構成される。 As shown in FIGS. 27 to 29, the temporary fixing cover member 31 is a disk-shaped member that closes the opening 13a of the second rod hole 13 from the outside, like the cover member 20 described above. It has a portion 24 and is detachably attached to the second boss portion 11 by the connecting tool 21. The temporary fixing cover member 31 is formed with a projecting piece portion 32 (an example of a convex portion and a second restraining means) for restraining the valve rod 4 in the rotation direction. The projecting piece portion 32 can be inserted into and removed from the groove portion 25 of the second valve rod 9 in the axial direction A of the valve rod 4, and is divided into two radially in the recessed portion 24. The groove 25 and the protrusion 32 constitute a restraining means for restraining the valve rod 4 in the rotating direction.

また、仮固定用カバー部材３１にはシール溝２２が全周にわたり形成され、シール溝２２にＯリング等の円環状のシール部材２３が嵌め込まれている。 Further, the temporary fixing cover member 31 is formed with a seal groove 22 over the entire circumference thereof, and an annular seal member 23 such as an O ring is fitted into the seal groove 22.

以下に、開閉用操作機７のメンテナンスを行う際の手順を説明する。 Below, the procedure at the time of performing maintenance of the operating device 7 for opening and closing is demonstrated.

管路６に通水した状態で、図１８に示すように、開閉用操作機７のハンドル１５を回して弁体３を全閉位置にし、連結具２１を外して、カバー部材２０を第２ボス部１１から取り外し、調節ボルト５４およびナット５５と調節板５３とを第２弁棒９から取り外すとともに、スラスト受け部材６０を取り外す。 With the water flowing through the pipe line 6, as shown in FIG. 18, the handle 15 of the opening/closing operating device 7 is turned to bring the valve element 3 to the fully closed position, the connecting tool 21 is removed, and the cover member 20 is moved to the second position. The thrust bolt 54, the nut 55, and the adjusting plate 53 are removed from the boss portion 11, the adjusting plate 53 is removed from the second valve rod 9, and the thrust receiving member 60 is removed.

その後、連結具２１を用いて、図２７に示すように、仮固定用カバー部材３１を第２ボス部１１に取り付ける。この際、仮固定用カバー部材３１の突片部３２を第２弁棒９の溝部２５（図２２参照）に嵌合することにより、弁棒４（第１および第２弁棒８，９）が拘束手段（溝部２５および突片部３２）によって回動方向において拘束される。これにより、弁棒４が仮に（一時的に）固定され、この状態で、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。この際、図２７に示すように、弁棒４が回動方向において拘束されているため、弁体３が不用意に全閉位置から開方向へ回動することはなく、ウォーターハンマー等の発生を防止することができる。 After that, the connecting member 21 is used to attach the temporary fixing cover member 31 to the second boss portion 11, as shown in FIG. 27. At this time, the protrusion 32 of the temporary fixing cover member 31 is fitted into the groove 25 of the second valve rod 9 (see FIG. 22), so that the valve rod 4 (first and second valve rods 8 and 9). Are restrained in the rotating direction by the restraining means (the groove portion 25 and the protruding piece portion 32). As a result, the valve rod 4 is temporarily (temporarily) fixed, and in this state, the opening/closing operating device 7 is removed from the first boss portion 10 and separated from the first valve rod 8 to perform maintenance of the opening/closing operating device 7. It can be performed. At this time, as shown in FIG. 27, since the valve rod 4 is restrained in the rotating direction, the valve body 3 does not rotate carelessly from the fully closed position to the opening direction, and a water hammer or the like is generated. Can be prevented.

また、拘束手段を構成する溝部２５と突片部３２とのうち、溝部２５が第２弁棒９に備えられ、突片部３２が仮固定用カバー部材３１に備えられているため、拘束手段に応じて弁棒４を長くする必要はなく、これによりバタフライ弁１を小型軽量化することができる。 Further, among the groove portion 25 and the protruding piece portion 32 that form the restraining means, the groove portion 25 is provided in the second valve rod 9 and the protruding piece portion 32 is provided in the temporary fixing cover member 31, so that the restraining means is provided. Therefore, it is not necessary to lengthen the valve rod 4, and the butterfly valve 1 can be reduced in size and weight.

開閉用操作機７のメンテナンスを行った後、開閉用操作機７を第１ボス部１０に取り付けて第１弁棒８に接続し、これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。 After the maintenance of the opening/closing operating device 7, the opening/closing operating device 7 is attached to the first boss portion 10 and connected to the first valve rod 8, whereby the valve rod 4 is rotated by the opening/closing operating device 7. Constrained in direction.

その後、連結具２１を外して、仮固定用カバー部材３１を第２ボス部１１から取り外し、その後、図１９に示すように、調節ボルト５４およびナット５５と調節板５３とを第２弁棒９に取り付けるとともに、スラスト受け部材６０を取り付け、連結具２１を用いて、カバー部材２０を第２ボス部１１に取り付ける。これにより、仮固定用カバー部材３１による弁棒４の拘束が解除されるため、図１８に示すように、開閉用操作機７のハンドル１５を回すことによって、弁棒４を弁体３と共に回動させ、弁体３の開度を変えることができる。 After that, the connecting tool 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and thereafter, as shown in FIG. 19, the adjusting bolt 54 and the nut 55 and the adjusting plate 53 are connected to the second valve rod 9. And the thrust receiving member 60, and the connecting member 21 is used to attach the cover member 20 to the second boss portion 11. Thereby, the restraint of the valve rod 4 by the temporary fixing cover member 31 is released. Therefore, as shown in FIG. 18, by rotating the handle 15 of the opening/closing operating device 7, the valve rod 4 is rotated together with the valve body 3. The opening degree of the valve body 3 can be changed by moving the valve body 3.

上記第４の実施の形態では、開閉用操作機７のメンテナンスを行う際、弁体３を全閉位置にして、弁棒４を拘束しているが、弁体３を全開位置にして、弁棒４を拘束してもよい。 In the fourth embodiment, when the maintenance of the opening/closing operating device 7 is performed, the valve body 3 is in the fully closed position and the valve rod 4 is restrained, but the valve body 3 is in the fully open position and the valve is opened. The rod 4 may be restrained.

（第５の実施の形態）
第５の実施の形態は上記第４の実施の形態の変形例であり、図２０，図２１に示すように、調節板５３には貫通孔５６と複数個（図２０では８個）の孔部５７とが形成されており、これら孔部５７は弁棒４を回動方向において拘束するための凹部および第１拘束手段の一例である。 (Fifth Embodiment)
The fifth embodiment is a modification of the fourth embodiment, and as shown in FIGS. 20 and 21, the adjustment plate 53 has through holes 56 and a plurality of holes (eight holes in FIG. 20). Portions 57 are formed, and these holes 57 are an example of a recess for restraining the valve rod 4 in the rotational direction and a first restraint means.

図３０〜図３２に示すように、仮固定用カバー部材３１には、弁棒４を回動方向において拘束するための複数本のピン６２（凸部および第２拘束手段の一例）が形成されている。これらピン６２は、９０°おきに４本配設され、弁棒４の軸心方向Ａにおいて、調節板５３の孔部５７に嵌脱自在である。尚、図２０に示すように、孔部５７の個数は、第２弁棒９に設けられた止めねじ５９の本数（図１９，図２２では２本）よりも多く、かつ、ピン６２の本数（図３０では４本）以上である。 As shown in FIGS. 30 to 32, the temporary fixing cover member 31 is formed with a plurality of pins 62 (an example of a convex portion and a second restraint means) for restraining the valve rod 4 in the rotation direction. ing. Four of these pins 62 are arranged at 90° intervals, and can be inserted into and removed from the hole 57 of the adjusting plate 53 in the axial direction A of the valve rod 4. As shown in FIG. 20, the number of holes 57 is greater than the number of setscrews 59 (two in FIGS. 19 and 22) provided on the second valve rod 9 and the number of pins 62. (4 in FIG. 30) or more.

また、孔部５７とピン６２とで、弁棒４を回動方向において拘束する拘束手段が構成される。 Further, the hole 57 and the pin 62 constitute a restraint means for restraining the valve rod 4 in the rotation direction.

以下に、開閉用操作機７のメンテナンスを行う際の手順を説明する。 Below, the procedure at the time of performing maintenance of the operating device 7 for opening and closing is demonstrated.

管路６に通水した状態で、開閉用操作機７のハンドル１５を回して弁体３を全閉位置にし、図１９の仮想線で示すように、連結具２１を外して、カバー部材２０を第２ボス部１１から取り外す。 With the water flowing through the pipe line 6, the handle 15 of the opening/closing operating device 7 is turned to bring the valve element 3 to the fully closed position, and as shown by the phantom line in FIG. Is removed from the second boss portion 11.

その後、図３２に示すように、調節部材２８を第２弁棒９に装着したままの状態で、連結具２１を用いて、仮固定用カバー部材３１を第２ボス部１１に取り付ける。この際、図２０の仮想線および図３２に示すように、仮固定用カバー部材３１のピン６２を、調節板５３の複数個の孔部５７のうちの止めねじ５９が挿入されていない孔部５７に嵌合することによって、調節板５３が拘束手段（孔部５７およびピン６２）によって回動方向において拘束される。 Then, as shown in FIG. 32, the temporary fixing cover member 31 is attached to the second boss portion 11 using the connecting tool 21 while the adjusting member 28 is still attached to the second valve rod 9. At this time, as shown in phantom lines in FIG. 20 and FIG. 32, the pin 62 of the temporary fixing cover member 31 is connected to the hole portion of the plurality of hole portions 57 of the adjusting plate 53 in which the set screw 59 is not inserted. By fitting the adjustment plate 53 into the adjustment member 57, the adjustment plate 53 is restrained in the rotation direction by the restraint means (the hole 57 and the pin 62).

この際、図１９および図２０の仮想線で示すように、第２弁棒９の止めねじ５９が調節板５３の孔部５７に挿入されているため、弁棒本体２７（第１弁棒８および第２弁棒９）が、調節板５３を介して拘束手段（図３２に示す孔部５７およびピン６２）により、回動方向において拘束される。これにより、弁棒４が仮に固定され、この状態で、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。 At this time, as shown by the phantom lines in FIGS. 19 and 20, the set screw 59 of the second valve rod 9 is inserted into the hole 57 of the adjusting plate 53, so that the valve rod main body 27 (the first valve rod 8). Also, the second valve rod 9) is restrained in the rotating direction by the restraining means (the hole portion 57 and the pin 62 shown in FIG. 32) via the adjusting plate 53. As a result, the valve rod 4 is temporarily fixed, and in this state, the opening/closing operating device 7 can be removed from the first boss portion 10 and detached from the first valve rod 8 to perform maintenance of the opening/closing operating device 7. ..

また、図３２に示すように、拘束手段を構成する孔部５７とピン６２とのうち、孔部５７が調節板５３に備えられ、ピン６２が仮固定用カバー部材３１に備えられているため、拘束手段に応じて弁棒４を長くする必要はなく、これによりバタフライ弁１を小型軽量化することができる。 Further, as shown in FIG. 32, of the holes 57 and the pins 62 that constitute the restraint means, the holes 57 are provided in the adjustment plate 53, and the pins 62 are provided in the temporary fixing cover member 31. It is not necessary to lengthen the valve rod 4 depending on the restraint means, and the butterfly valve 1 can be made smaller and lighter.

開閉用操作機７のメンテナンスを行った後、開閉用操作機７を第１ボス部１０に取り付けて第１弁棒８に接続し、これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。 After the maintenance of the opening/closing operating device 7, the opening/closing operating device 7 is attached to the first boss portion 10 and connected to the first valve rod 8, whereby the valve rod 4 is rotated by the opening/closing operating device 7. Constrained in direction.

その後、図３２の仮想線で示すように、連結具２１を外して、仮固定用カバー部材３１を第２ボス部１１から取り外し、その後、図１８，図１９に示すように、連結具２１を用いて、カバー部材２０を第２ボス部１１に取り付ける。これにより、仮固定用カバー部材３１による弁棒４の拘束が解除されるため、開閉用操作機７のハンドル１５を回すことによって、弁棒４を弁体３と共に回動させ、弁体３の開度を変えることができる。 Then, as shown by the phantom line in FIG. 32, the connector 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and then the connector 21 is removed as shown in FIGS. 18 and 19. The cover member 20 is attached to the second boss 11 by using the cover member 20. As a result, the restraint of the valve rod 4 by the temporary fixing cover member 31 is released. Therefore, by rotating the handle 15 of the opening/closing operating device 7, the valve rod 4 is rotated together with the valve body 3 and the valve body 3 is rotated. The opening can be changed.

また、本第５の実施の形態では、開閉用操作機７のメンテナンスを行う際、調節部材２８を第２弁棒９に着脱する必要が無く、調節部材２８を第２弁棒９に装着したままの状態で、開閉用操作機７のメンテナンスを行うことができるので、メンテナンス作業を迅速且つ容易に行うことができる。 Further, in the fifth embodiment, it is not necessary to attach/detach the adjusting member 28 to/from the second valve rod 9 when performing maintenance of the opening/closing operating device 7, and the adjusting member 28 is attached to the second valve rod 9. Since the maintenance of the operating device 7 for opening and closing can be performed in this state, the maintenance work can be performed quickly and easily.

上記第５の実施の形態では、開閉用操作機７のメンテナンスを行う際、弁体３を全閉位置にして、弁棒４を拘束しているが、弁体３を全開位置にして、弁棒４を拘束してもよい。 In the fifth embodiment, when performing maintenance of the opening/closing operating device 7, the valve body 3 is in the fully closed position and the valve rod 4 is constrained, but the valve body 3 is in the fully open position and the valve is opened. The rod 4 may be restrained.

（第６の実施の形態）
第６の実施の形態はギヤ式の拘束手段を用いて弁棒４を仮固定するものである。 (Sixth Embodiment)
In the sixth embodiment, the valve rod 4 is temporarily fixed using a gear type restraining means.

すなわち、第１の実施の形態と同様に、図４，図５に示すように、第２弁棒９の他端部に、溝部２５が直径方向にわたって一直線状に形成されている。また、図３３〜図３７に示すように、拘束手段は外歯車７１と内歯車７２とを有している。 That is, similar to the first embodiment, as shown in FIGS. 4 and 5, the groove 25 is formed in the other end of the second valve rod 9 in a straight line across the diameter direction. Further, as shown in FIGS. 33 to 37, the restraint means has an external gear 71 and an internal gear 72.

図３３〜図３５に示すように、外歯車７１は、外周に複数の歯を有する円板状の部材であり、第２弁棒９の他端部に着脱自在に取り付けられる。また、外歯車７１には突片部７３が設けられている。突片部７３は、弁棒４の軸心方向Ａにおいて、第２弁棒９の溝部２５に嵌脱自在である。 As shown in FIGS. 33 to 35, the external gear 71 is a disk-shaped member having a plurality of teeth on its outer circumference, and is detachably attached to the other end of the second valve rod 9. Further, the external gear 71 is provided with a protrusion 73. The protruding piece portion 73 can be inserted into and removed from the groove portion 25 of the second valve rod 9 in the axial direction A of the valve rod 4.

図３３，図３６，図３７に示すように、内歯車７２は、内周に複数の歯を有する円環状の部材であり、仮固定用カバー部材３１に設けられている。仮固定用カバー部材３１は、第２棒孔１３の開口部１３ａを外側から閉じる円板状の部材であり、複数本のボルト等の連結具２１によって第２ボス部１１に着脱自在に取り付けられている。尚、仮固定用カバー部材３１にはシール溝２２が全周にわたり形成され、シール溝２２にＯリング等の円環状のシール部材２３が嵌め込まれている。 As shown in FIGS. 33, 36, and 37, the internal gear 72 is an annular member having a plurality of teeth on its inner circumference, and is provided on the temporary fixing cover member 31. The temporary fixing cover member 31 is a disk-shaped member that closes the opening 13a of the second rod hole 13 from the outside, and is detachably attached to the second boss portion 11 by a connector 21 such as a plurality of bolts. ing. A seal groove 22 is formed over the entire circumference of the temporary fixing cover member 31, and an annular seal member 23 such as an O-ring is fitted in the seal groove 22.

以下、上記構成における作用を説明する。 The operation of the above configuration will be described below.

通常運転時においては、図３８に示すように、外歯車７１を第２弁棒９の他端部から取り外し、仮固定用カバー部材３１を第２ボス部１１に取り付けた状態にしておく。そして、開閉用操作機７のハンドル１５を回すことにより、第１弁棒８と第２弁棒９と弁体３とが一体に弁棒４の軸心周りに回動し、弁箱２内の流路５が開閉される。これにより、弁体３が全閉位置又は全開位置或いは全閉位置と全開位置との間の任意の開度に切り換えられ、この状態で、第１弁棒８が開閉用操作機７によって回動方向において拘束されるため、弁体３が不用意に開閉方向へ回動するのを防止することができる。 During normal operation, as shown in FIG. 38, the external gear 71 is removed from the other end of the second valve rod 9 and the temporary fixing cover member 31 is attached to the second boss 11. Then, by turning the handle 15 of the opening/closing operating device 7, the first valve rod 8, the second valve rod 9, and the valve body 3 are integrally rotated around the axis of the valve rod 4, and the inside of the valve box 2 is rotated. The channel 5 is opened and closed. As a result, the valve body 3 is switched to the fully closed position, the fully open position, or an arbitrary opening degree between the fully closed position and the fully open position, and in this state, the first valve rod 8 is rotated by the opening/closing operation device 7. Since the valve body 3 is constrained in the direction, it is possible to prevent the valve body 3 from inadvertently rotating in the opening/closing direction.

以下に、開閉用操作機７のメンテナンスを行う際の手順を説明する。 Below, the procedure at the time of performing maintenance of the operating device 7 for opening and closing is demonstrated.

管路６に通水した状態で、開閉用操作機７のハンドル１５を回して弁体３を全閉位置にし、図３８の仮想線で示すように、連結具２１を外して、仮固定用カバー部材３１を第２ボス部１１から一旦取り外す。 With the water flowing through the pipe line 6, the handle 15 of the opening/closing operating device 7 is turned to bring the valve element 3 to the fully closed position, and as shown by the phantom line in FIG. The cover member 31 is once removed from the second boss 11.

その後、図３３に示すように、外歯車７１の突片部７３を第２弁棒９の溝部２５に嵌め込んで、外歯車７１を第２弁棒９の他端部に取り付ける。その後、連結具２１を用いて、仮固定用カバー部材３１を第２ボス部１１に取り付ける。 Thereafter, as shown in FIG. 33, the protruding piece portion 73 of the external gear 71 is fitted into the groove portion 25 of the second valve rod 9, and the external gear 71 is attached to the other end portion of the second valve rod 9. After that, the connecting member 21 is used to attach the temporary fixing cover member 31 to the second boss portion 11.

これにより、外歯車７１と内歯車７２とが互いに歯合し、弁棒４（第１および第２弁棒８，９）が拘束手段（外歯車７１および内歯車７２）によって回動方向において拘束されるため、弁棒４が仮に（一時的に）固定され、この状態で、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。この際、弁棒４が回動方向において拘束されているため、弁体３が不用意に全閉位置から開方向へ回動することはなく、ウォーターハンマー等の発生を防止することができる。 As a result, the external gear 71 and the internal gear 72 mesh with each other, and the valve rod 4 (the first and second valve rods 8 and 9) is restrained in the rotating direction by the restraining means (the external gear 71 and the internal gear 72). Therefore, the valve rod 4 is temporarily (temporarily) fixed, and in this state, the opening/closing operating device 7 is detached from the first boss portion 10 and separated from the first valve rod 8, so that the opening/closing operating device 7 Maintenance can be performed. At this time, since the valve rod 4 is restrained in the rotating direction, the valve body 3 does not carelessly rotate from the fully closed position to the opening direction, and the occurrence of a water hammer or the like can be prevented.

また、拘束手段を構成する外歯車７１と内歯車７２とのうち、外歯車７１が着脱自在に第２弁棒９に備えられ、内歯車７２が仮固定用カバー部材３１に備えられているため、拘束手段に応じて弁棒４を長くする必要はなく、これによりバタフライ弁１を小型軽量化することができる。 Further, among the external gear 71 and the internal gear 72 that constitute the restraint means, the external gear 71 is detachably provided on the second valve rod 9, and the internal gear 72 is provided on the temporary fixing cover member 31. It is not necessary to lengthen the valve rod 4 depending on the restraint means, and the butterfly valve 1 can be made smaller and lighter.

また、上記のように外歯車７１と内歯車７２とを用いて弁棒４を拘束するため、弁体３を、全閉位置だけではなく、全開位置、或いは、全閉位置と全開位置との間の任意の開度で仮固定することができる。 Further, since the valve rod 4 is constrained by using the external gear 71 and the internal gear 72 as described above, the valve body 3 is not limited to the fully closed position, but the fully open position, or the fully closed position and the fully open position. It can be temporarily fixed at any opening.

上記のようにして開閉用操作機７のメンテナンスを行った後、通常運転を行うには、開閉用操作機７を第１ボス部１０に取り付けて第１弁棒８に接続し、これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。 After performing the maintenance of the opening/closing operating device 7 as described above, in order to perform the normal operation, the opening/closing operating device 7 is attached to the first boss portion 10 and connected to the first valve rod 8. The valve rod 4 is restrained in the rotating direction by the opening/closing operating device 7.

その後、図３３の仮想線で示すように、連結具２１を外して、仮固定用カバー部材３１を第２ボス部１１から取り外し、さらに外歯車７１を第２弁棒９の他端部から取り外す。その後、図３８に示すように、外歯車７１を取り外した状態で、連結具２１を用いて仮固定用カバー部材３１を第２ボス部１１に取り付ける。これにより、拘束手段による弁棒４の拘束が解除されるため、開閉用操作機７のハンドル１５を回すことによって、弁棒４を弁体３と共に回動させ、弁体３の開度を変えることができる。 After that, as shown by the phantom line in FIG. 33, the connecting tool 21 is removed, the temporary fixing cover member 31 is removed from the second boss portion 11, and the external gear 71 is removed from the other end portion of the second valve rod 9. .. After that, as shown in FIG. 38, with the external gear 71 removed, the temporary fixing cover member 31 is attached to the second boss portion 11 using the connector 21. As a result, the restraint of the valve rod 4 by the restraint means is released. Therefore, by rotating the handle 15 of the opening/closing operating device 7, the valve rod 4 is rotated together with the valve body 3 to change the opening degree of the valve body 3. be able to.

尚、上記第６の実施の形態では、図３８の実線で示すように、通常運転時において、仮固定用カバー部材３１を第２ボス部１１に取り付けているが、仮固定用カバー部材３１の代わりに、第１の実施の形態において図３に示したカバー部材２０を第２ボス部１１に取り付けてもよい。 In the sixth embodiment, as shown by the solid line in FIG. 38, the temporary fixing cover member 31 is attached to the second boss portion 11 during normal operation. Alternatively, the cover member 20 shown in FIG. 3 in the first embodiment may be attached to the second boss portion 11.

また、上記第６の実施の形態では、図３３に示すように、外歯車７１を第２弁棒９の他端部に着脱自在に取り付け、内歯車７２を仮固定用カバー部材３１に設けているが、内歯車７２を第２弁棒９の他端部に着脱自在に取り付け、外歯車７１を仮固定用カバー部材３１に設けてもよい。 Further, in the sixth embodiment, as shown in FIG. 33, the external gear 71 is removably attached to the other end of the second valve rod 9, and the internal gear 72 is provided on the temporary fixing cover member 31. However, the internal gear 72 may be detachably attached to the other end of the second valve rod 9 and the external gear 71 may be provided on the temporary fixing cover member 31.

（第７の実施の形態）
上記各実施の形態では、弁棒４の他端部と仮固定用カバー部材３１，４８とに拘束手段を設けたが、以下に説明する第７の実施の形態では、図３９に示すように、弁棒４の他端部と弁箱２の第２ボス部１１（弁箱２の弁棒４の他端部に面した部分の一例）とに拘束手段を設けている。 (Seventh embodiment)
In each of the above-mentioned embodiments, the restraining means is provided at the other end of the valve rod 4 and the temporary fixing cover members 31, 48, but in the seventh embodiment described below, as shown in FIG. Restraining means are provided at the other end of the valve rod 4 and the second boss portion 11 of the valve box 2 (an example of a portion of the valve box 2 facing the other end of the valve rod 4 ).

すなわち、拘束手段は仮固定用ボルト７６（凸部の一例）と仮固定用孔部７７（凹部の一例）とを有している。このうち、仮固定用孔部７７は弁棒４の他端部すなわち第２弁棒９の外周面に形成されている。また、第２ボス部１１にはねじ孔７８が形成され、仮固定用ボルト７６が、ねじ孔７８に螺合することによって、第２ボス部１１に着脱自在に設けられる。仮固定用ボルト７６の先端部と仮固定用孔部７７とは弁棒４の径方向において嵌脱自在である。 That is, the restraint means has the temporary fixing bolt 76 (an example of a convex portion) and the temporary fixing hole 77 (an example of a concave portion). Of these, the temporary fixing hole 77 is formed on the other end of the valve rod 4, that is, on the outer peripheral surface of the second valve rod 9. Further, a screw hole 78 is formed in the second boss portion 11, and a temporary fixing bolt 76 is detachably provided in the second boss portion 11 by being screwed into the screw hole 78. The tip end of the temporary fixing bolt 76 and the temporary fixing hole 77 can be inserted into and removed from the valve rod 4 in the radial direction.

尚、第２棒孔１３の開口部１３ａを閉じるカバー部材２０が第２ボス部１１に取り付けられている。 A cover member 20 that closes the opening 13 a of the second rod hole 13 is attached to the second boss 11.

以下、上記構成における作用を説明する。 The operation of the above configuration will be described below.

通常運転時においては、図３９の仮想線で示すように、仮固定用ボルト７６を第２ボス部１１から外しておくことで、開閉用操作機７のハンドル１５を回すことにより、第１弁棒８と第２弁棒９と弁体３とが一体に弁棒４の軸心周りに回動し、弁箱２内の流路５が開閉される。 During normal operation, as shown by the phantom line in FIG. 39, the temporary fixing bolt 76 is removed from the second boss portion 11 to rotate the handle 15 of the opening/closing operation device 7, thereby causing the first valve to move. The rod 8, the second valve rod 9, and the valve element 3 are integrally rotated around the axis of the valve rod 4, and the flow path 5 in the valve box 2 is opened and closed.

また、開閉用操作機７のメンテナンス（保守点検）を行う場合は、開閉用操作機７のハンドル１５を回して弁体３を例えば全閉位置にし、図３９の実線で示すように、仮固定用ボルト７６を第２ボス部１１に取り付けて、仮固定用ボルト７６の先端部を仮固定用孔部７７に嵌入する。これにより、弁棒４（第１および第２弁棒８，９）が拘束手段（仮固定用ボルト７６および仮固定用孔部７７）によって回動方向において拘束され、この状態で、開閉用操作機７を第１ボス部１０から取り外して第１弁棒８から離脱させ、開閉用操作機７のメンテナンスを行うことができる。 Further, when performing maintenance (maintenance inspection) of the opening/closing operating device 7, the handle 15 of the opening/closing operating device 7 is turned to set the valve body 3 to, for example, the fully closed position, and temporarily fixed as shown by the solid line in FIG. The bolt 76 is attached to the second boss 11, and the tip of the temporary fixing bolt 76 is fitted into the temporary fixing hole 77. As a result, the valve rod 4 (first and second valve rods 8 and 9) is restrained in the rotating direction by the restraining means (temporary fixing bolt 76 and temporary fixing hole 77), and in this state, the opening/closing operation is performed. It is possible to remove the machine 7 from the first boss portion 10 and separate it from the first valve rod 8 to perform maintenance of the opening/closing operation machine 7.

また、拘束手段を構成する仮固定用ボルト７６と仮固定用孔部７７とのうち、仮固定用ボルト７６が第２ボス部１１に着脱自在に備えられ、仮固定用孔部７７が第２弁棒９の外周面に備えられているため、拘束手段に応じて弁棒４を長くする必要はなく、これによりバタフライ弁１を小型軽量化することができる。 Further, of the temporary fixing bolts 76 and the temporary fixing holes 77 that constitute the restraint means, the temporary fixing bolts 76 are detachably provided in the second boss portion 11, and the temporary fixing hole portions 77 are the second. Since it is provided on the outer peripheral surface of the valve rod 9, it is not necessary to lengthen the valve rod 4 depending on the restraint means, and thereby the butterfly valve 1 can be made compact and lightweight.

開閉用操作機７のメンテナンスを行った後、開閉用操作機７を第１ボス部１０に取り付けて第１弁棒８に接続し、これにより、弁棒４が開閉用操作機７によって回動方向において拘束される。その後、図３９の仮想線で示すように、仮固定用ボルト７６を第２ボス部１１から外しておく。 After the maintenance of the opening/closing operating device 7, the opening/closing operating device 7 is attached to the first boss portion 10 and connected to the first valve rod 8, whereby the valve rod 4 is rotated by the opening/closing operating device 7. Constrained in direction. Then, as shown by the phantom line in FIG. 39, the temporary fixing bolt 76 is removed from the second boss portion 11.

上記第７の実施の形態では、開閉用操作機７のメンテナンスを行う際、弁体３を全閉位置にしたときに、第２弁棒９の仮固定用孔部７７の位置と第２ボス部１１のねじ孔７８の位置とが合致して、弁棒４を仮固定しているが、弁体３を全開位置にしたときに、第２弁棒９の仮固定用孔部７７の位置と第２ボス部１１のねじ孔７８の位置とが合致して、弁棒４を仮固定してもよい。 In the seventh embodiment, when performing maintenance of the opening/closing operating device 7, when the valve body 3 is in the fully closed position, the position of the temporary fixing hole 77 of the second valve rod 9 and the second boss. Although the valve rod 4 is temporarily fixed by matching the position of the screw hole 78 of the portion 11, the position of the temporary fixing hole portion 77 of the second valve rod 9 when the valve body 3 is in the fully open position. The valve rod 4 may be temporarily fixed by matching the position of the screw hole 78 of the second boss portion 11 with that of the second boss portion 11.

上記第７の実施の形態では、凹部を第２弁棒９に設け、凸部を第２ボス部１１に設けたが、凹部を第２ボス部１１に設け、凸部を第２弁棒９に設けてもよい。 In the seventh embodiment, the concave portion is provided in the second valve rod 9 and the convex portion is provided in the second boss portion 11. However, the concave portion is provided in the second boss portion 11, and the convex portion is provided in the second valve rod 9. May be provided.

上記各実施の形態では、開閉用作動機の一例として、ハンドル１５と減速機１６とを有する手動回転式の開閉用操作機７を挙げたが、モータ等を有する電動回転式のものを用いてもよい。 In each of the above-described embodiments, as an example of the opening/closing actuator, the manual rotary opening/closing operating machine 7 having the handle 15 and the speed reducer 16 has been described, but an electric rotary type operating machine having a motor or the like is used. Good.

上記各実施の形態では、第１弁棒８と第２弁棒９とに分割された分割構造の弁棒４を挙げたが、第１弁棒８と第２弁棒９とを接合した一本構造の弁棒であってもよい。 In each of the above-described embodiments, the valve rod 4 having the divided structure in which the first valve rod 8 and the second valve rod 9 are divided has been described, but the first valve rod 8 and the second valve rod 9 are joined together. The valve rod of this structure may be used.

上記各実施の形態では、弁の一例としてバタフライ弁１を挙げたが、バタフライ弁１に限定されるものではなく、例えばボール弁等にも適用することができる。 In each of the above embodiments, the butterfly valve 1 is given as an example of the valve, but the invention is not limited to the butterfly valve 1 and can be applied to, for example, a ball valve or the like.

１ バタフライ弁（弁）
２ 弁箱
３ 弁体
４ 弁棒
５ 流路
７ 開閉用操作機（開閉用作動機）
１３ 第２棒孔
１３ａ 第２棒孔の開口部
２５ 溝部（凹部、第１拘束手段）
２７ 弁棒本体
２８ 調節部材
３１ 仮固定用カバー部材
３２ 突片部（凸部、第２拘束手段）
４０ 孔部（凹部、第１拘束手段）
４２ ピン（凸部、第２拘束手段）
４８ 仮固定用カバー部材
５７ 孔部（凹部、第１拘束手段）
６２ ピン（凸部、第２拘束手段）
７１ 外歯車
７２ 内歯車
７６ 仮固定用ボルト（凸部）
７７ 仮固定用孔部（凹部）
Ａ 軸心方向 1 Butterfly valve (valve)
2 Valve box 3 Valve body 4 Valve rod 5 Flow path 7 Opening/closing actuator (opening/closing actuator)
13 Second Bar Hole 13a Second Bar Hole Opening 25 Groove (Recess, First Restraining Means)
27 Valve Bar Body 28 Adjusting Member 31 Temporary Fixing Cover Member 32 Projecting Piece (Convex Section, Second Restraining Means)
40 holes (recess, first restraint)
42 pins (projection, second restraint)
48 Temporary Fixing Cover Member 57 Hole (Concave, First Restraining Means)
62 pins (projection, second restraint)
71 External Gear 72 Internal Gear 76 Temporary Fixing Bolt (Projection)
77 Temporary fixing hole (recess)
A axis direction

Claims (3)

弁体が弁棒と一体に回動して弁箱内の流路を開閉し、
弁棒の一端部に、弁棒を回動させる開閉用作動機が着脱自在に設けられ、
弁棒の他端部が弁箱に形成された棒孔に回動自在に挿入された弁の弁棒を仮に固定する仮固定構造であって、
弁棒は、弁体に設けられた弁棒本体と、弁棒本体の他端部に設けられた調節部材とを有し、
調節部材は、弁棒本体の位置を軸心方向において調節するものであって、弁棒本体と一体に回動自在であり、
弁棒を回動方向において拘束する拘束手段が凸部と凹部とを有し、
凸部は弁箱に着脱自在に取り付けられて棒孔の開口部を外側から閉じる仮固定用カバー部材に設けられ、
凹部は調節部材に設けられ、
凸部と凹部とが弁棒の軸心方向において嵌脱自在であることを特徴とする弁棒の仮固定構造。 The valve body rotates together with the valve rod to open and close the flow path in the valve box,
An opening/closing actuator for rotating the valve rod is detachably provided at one end of the valve rod,
A temporary fixing structure for temporarily fixing the valve rod of the valve, the other end of which is rotatably inserted into a rod hole formed in the valve box,
The valve rod has a valve rod main body provided on the valve body and an adjusting member provided on the other end of the valve rod main body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
The restraint means for restraining the valve rod in the rotating direction has a convex portion and a concave portion,
The convex portion is detachably attached to the valve box and provided on the temporary fixing cover member that closes the opening of the rod hole from the outside.
The recess is provided in the adjustment member,
A temporary fixing structure for a valve rod, characterized in that the convex portion and the concave portion can be freely inserted and removed in the axial direction of the valve rod. 弁体が弁棒と一体に回動して弁箱内の流路を開閉し、
弁棒の一端部に、弁棒を回動させる開閉用作動機が着脱自在に設けられ、
弁棒の他端部が弁箱に形成された棒孔に回動自在に挿入された弁の弁棒を仮に固定する仮固定構造であって、
弁棒は、弁体に設けられた弁棒本体と、弁棒本体の他端部に着脱自在に設けられた調節部材とを有し、
調節部材は、弁棒本体の位置を軸心方向において調節するものであって、弁棒本体と一体に回動自在であり、
弁棒を回動方向において拘束する拘束手段が凸部と凹部とを有し、
凸部は弁箱に着脱自在に取り付けられて棒孔の開口部を外側から閉じる仮固定用カバー部材に設けられ、
凹部は弁棒本体の他端部に設けられ、
凸部と凹部とが弁棒の軸心方向において嵌脱自在であることを特徴とする弁棒の仮固定構造。 The valve body rotates together with the valve rod to open and close the flow path in the valve box,
An opening/closing actuator for rotating the valve rod is detachably provided at one end of the valve rod,
A temporary fixing structure for temporarily fixing the valve rod of the valve, the other end of which is rotatably inserted into a rod hole formed in the valve box,
The valve rod has a valve rod body provided on the valve body, and an adjusting member detachably provided on the other end of the valve rod body,
The adjusting member adjusts the position of the valve stem body in the axial direction, and is rotatable integrally with the valve stem body.
The restraint means for restraining the valve rod in the rotating direction has a convex portion and a concave portion,
The convex portion is detachably attached to the valve box and provided on the temporary fixing cover member that closes the opening of the rod hole from the outside.
The recess is provided at the other end of the valve stem body,
A temporary fixing structure for a valve rod, characterized in that the convex portion and the concave portion can be freely inserted and removed in the axial direction of the valve rod. 仮固定用カバー部材は、凸部と凹部とが嵌合する拘束姿勢と、凸部と凹部とが離間する非拘束姿勢との表裏逆向きの姿勢で弁箱に取付可能であることを特徴とする請求項１又は請求項２に記載の弁棒の仮固定構造。 The temporary fixing cover member is characterized in that it can be attached to the valve box in a reverse posture of a restraining posture in which the convex portion and the concave portion are fitted and a non-constraining posture in which the convex portion and the concave portion are separated from each other. The temporary fixing structure for the valve rod according to claim 1 or 2 .
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