JP2006239836A - Valve seat lapping device - Google Patents

Valve seat lapping device Download PDF

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JP2006239836A
JP2006239836A JP2005061277A JP2005061277A JP2006239836A JP 2006239836 A JP2006239836 A JP 2006239836A JP 2005061277 A JP2005061277 A JP 2005061277A JP 2005061277 A JP2005061277 A JP 2005061277A JP 2006239836 A JP2006239836 A JP 2006239836A
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valve seat
surface plate
valve
shaft
guide
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JP2005061277A
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Japanese (ja)
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Yozo Sano
陽三 佐野
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Chugoku Electric Power Co Inc
Chuden Plant Co Ltd
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Chugoku Electric Power Co Inc
Chuden Plant Co Ltd
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Priority to JP2005061277A priority Critical patent/JP2006239836A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To simply and easily carry out lapping of a valve seat. <P>SOLUTION: This valve seat lapping device has a surface plate 21 on which a polishing member 21a is provided, a surface plate shaft 22 projected from and provided on the surface plate 21 and a surface plate guide 23 to support the surface plate shaft 22 free to rotate and carries out lapping of the valve seat by polishing a seat surface 13 of the valve seat 13 with the polishing member 21a, and an axial slippage preventive guide 27 to prevent slippage of a rotation axis of the surface plate 21 against a center of the valve seat 13 is provided on the valve seat side against the surface plate 21. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、弁座摺り合わせ装置に関する。   The present invention relates to a valve seat sliding apparatus.

従来、発電所や化学プラント等では、流体の流れを制御するために、仕切弁や玉形弁，逆止弁等の種々の弁が用いられている。このような弁では、弁箱内に設けられている弁座や弁体が流体の流れによって摩耗や腐食を生じ、弁閉鎖時の密閉性が低下してしまうことがある。このような場合、密閉性を確保できるように弁座や弁体を所定の形状に加工することが行われる。例えば弁体については、特許文献１の玉形弁弁体シート面摺り合わせ装置を用いることで所定の形状に加工することができる。また、弁座については、図３に示す弁座摺り合わせ装置５０を用いることで所定の形状に加工することができる。なお、図３は玉形弁と玉形弁に用いる従来の弁座摺り合わせ装置を示しており、玉形弁については断面概略図を用いている。   Conventionally, in a power plant, a chemical plant, and the like, various valves such as a gate valve, a ball valve, and a check valve are used to control the flow of fluid. In such a valve, the valve seat and the valve body provided in the valve box may be worn or corroded by the flow of fluid, and the sealing performance when the valve is closed may be reduced. In such a case, the valve seat and the valve body are processed into a predetermined shape so as to ensure hermeticity. For example, the valve body can be processed into a predetermined shape by using the ball valve body seat surface rubbing apparatus of Patent Document 1. Further, the valve seat can be processed into a predetermined shape by using the valve seat sliding device 50 shown in FIG. In addition, FIG. 3 has shown the conventional valve seat sliding apparatus used for a ball-shaped valve and a ball-shaped valve, and uses cross-sectional schematic about the ball-shaped valve.

図３において、玉形弁１０では、球状の弁箱１１の内部にＳ字状流路１２が形成されており、Ｓ字状流路１２の中間部分にリング形状の弁座１３が形成されている。また、弁箱１１には、弁体を挿入するための弁体挿入口１４が設けられている。弁体挿入口１４のフランジ１５には、弁体等が取り付けられているボンネット（図示せず）を弁箱１１に取る付ける際に、ボンネットを容易に正しい位置に位置出しできるようにインロー部１５ａが形成されている。また、フランジ１５には、ボンネットをボルトで固定するためのボルト穴１５ｂが形成されている。   In FIG. 3, in the ball valve 10, an S-shaped flow path 12 is formed inside a spherical valve box 11, and a ring-shaped valve seat 13 is formed in an intermediate portion of the S-shaped flow path 12. Yes. The valve box 11 is provided with a valve element insertion port 14 for inserting a valve element. When attaching a bonnet (not shown) to which a valve body or the like is attached to the valve box 11 to the flange 15 of the valve body insertion port 14, the spigot portion 15 a can be easily positioned at the correct position. Is formed. Further, the flange 15 is formed with a bolt hole 15b for fixing the bonnet with a bolt.

弁座摺り合わせ装置５０では、弁体のシート面と対応したテーパ面が先端に形成されている定盤５１が用いられている。この定盤５１のテーパ面５１ａには、弁座１３のシート面１３ａを研磨する研磨部材例えばサンドペーパが貼付されている。この定盤５１には、リング状の弁座１３に設けられているシート面１３ａに対して、定盤５１に設けた研磨部材を回転させながら当接できるようにするための定盤軸５２が突設されている。この定盤軸５２は、定盤ガイド５３によって回転自在に保持されている。定盤ガイド５３はインロー部１５ａに嵌合するように形成されている。例えばインロー部１５ａの形状に合わせて定盤ガイド５３の形状が設定されており、あるいはインロー部１５ａの形状に合わせて定盤ガイド５３の定盤側の面から突設させて嵌合部が形成されている。   In the valve seat sliding apparatus 50, a surface plate 51 is used in which a tapered surface corresponding to the seat surface of the valve body is formed at the tip. A polishing member for polishing the seat surface 13 a of the valve seat 13, such as sandpaper, is attached to the tapered surface 51 a of the surface plate 51. The surface plate 51 has a surface plate shaft 52 for allowing the polishing member provided on the surface plate 51 to abut against the seat surface 13 a provided on the ring-shaped valve seat 13 while rotating. Projected. The surface plate shaft 52 is rotatably held by a surface plate guide 53. The surface plate guide 53 is formed so as to be fitted into the spigot portion 15a. For example, the shape of the surface plate guide 53 is set in accordance with the shape of the inlay portion 15a, or the fitting portion is formed by projecting from the surface of the surface plate guide 53 on the surface plate side in accordance with the shape of the inlay portion 15a. Has been.

このように構成された弁座摺り合わせ装置５０を用いて、弁座１３のシート面１３ａを所望の形状に加工する場合、図４に示すように弁体挿入口１４から定盤５１を挿入し、インロー部１５ａに定盤ガイド５３を嵌合させることで、弁箱１１に対して弁座摺り合わせ装置５０を正しい位置に設置する。その後、定盤５１を弁座１３に当接させて定盤軸５２を回転することにより弁座１３のシート面を研磨することで、弁座１３のシート面を弁体のシート面に対応させて所望の形状に加工することができる。   When the seat surface 13a of the valve seat 13 is processed into a desired shape by using the valve seat sliding device 50 configured as described above, a surface plate 51 is inserted from the valve element insertion port 14 as shown in FIG. By fitting the surface plate guide 53 to the inlay portion 15 a, the valve seat sliding device 50 is installed at a correct position with respect to the valve box 11. Then, the seat surface of the valve seat 13 is made to correspond to the seat surface of the valve body by polishing the seat surface of the valve seat 13 by bringing the surface plate 51 into contact with the valve seat 13 and rotating the surface plate shaft 52. Can be processed into a desired shape.

特開平８−２１６００８号公報JP-A-8-216008

ところで、玉形弁１０がプラント内に組み込まれている状態で弁座１３のシート面を研磨する場合、弁座摺り合わせ装置５０の定盤軸５２の軸方向は、玉形弁１０の取り付け状態に応じて水平方向や垂直方向など種々の方向とされる。ここで、定盤５１の回転軸と弁座１３の中心が一致しない状態で弁座摺り合わせ動作が行われる場合、例えば図５に示すように、インロー部１５ａに定盤ガイド５３を嵌合させたときの定盤５１の位置が定盤５１の重み等によって下がってしまうと、弁座１３の中心を基準とした研磨が行われなくなり、弁座１３のシート面を弁体のシート面に対応させて正しく研磨することができない。   By the way, when the seat surface of the valve seat 13 is polished in a state where the ball valve 10 is incorporated in the plant, the axial direction of the surface plate shaft 52 of the valve seat sliding device 50 is the mounting state of the ball valve 10. Depending on the direction, various directions such as a horizontal direction and a vertical direction are set. Here, when the valve seat sliding operation is performed in a state where the rotation axis of the surface plate 51 and the center of the valve seat 13 do not coincide with each other, for example, as shown in FIG. If the position of the surface plate 51 is lowered due to the weight of the surface plate 51 or the like, polishing based on the center of the valve seat 13 is not performed, and the seat surface of the valve seat 13 corresponds to the seat surface of the valve body. Can not be polished properly.

また、定盤５１の回転軸と弁座１３の中心が一致しない状態で弁座摺り合わせ動作が行われると、弁座１３と定盤５１のテーパ面５１ａを当接させたときに、定盤５１に加わる径方向の負荷がアンバランスとなって定盤５１の回転軸の偏芯を生じさせてしまうおそれがある。このような場合にも、弁座１３を正しく研磨することができない。   Further, when the valve seat sliding operation is performed in a state where the rotation axis of the surface plate 51 and the center of the valve seat 13 do not coincide with each other, the surface plate is brought into contact with the tapered surface 51a of the surface plate 51. The radial load applied to 51 may become unbalanced and cause the eccentricity of the rotating shaft of the surface plate 51. Even in such a case, the valve seat 13 cannot be polished correctly.

そこで、この発明では、簡単かつ容易に弁座の摺り合わせを行うことができる弁座摺り合わせ装置を提供するものである。   Therefore, the present invention provides a valve seat sliding device that can easily and easily slide the valve seats together.

この発明に係る弁座摺り合わせ装置は、研磨部材が設けられた定盤と、該定盤から突設して設けられた定盤軸と、該定盤軸を回転可能に支持する定盤ガイドを有し、定盤を弁座に当接させて回転することにより弁座のシート面を研磨部材で研磨して弁座摺り合わせを行う弁座摺り合わせ装置において、定盤に対して弁座側に、弁座の中心に対する定盤の回転軸のずれを防止する軸ずれ防止機構を設けたものである。また、定盤ガイドを弁座が設けられている弁箱に固定する定盤ガイド固定機構を設けたものである。さらに、定盤を弁座方向に押圧する押圧機構と、押圧機構による押圧力を調整する押圧力調整機構を設けたものである。   A valve seat sliding apparatus according to the present invention includes a surface plate provided with a polishing member, a surface plate shaft provided protruding from the surface plate, and a surface plate guide that rotatably supports the surface plate shaft. In a valve seat sliding apparatus for performing valve seat sliding by polishing the seat surface of the valve seat with a polishing member by rotating the surface plate in contact with the valve seat, the valve seat On the side, a shaft misalignment prevention mechanism for preventing the displacement of the rotation axis of the surface plate with respect to the center of the valve seat is provided. Further, a surface plate guide fixing mechanism for fixing the surface plate guide to a valve box provided with a valve seat is provided. Furthermore, a pressing mechanism for pressing the surface plate in the valve seat direction and a pressing force adjusting mechanism for adjusting the pressing force by the pressing mechanism are provided.

この発明によれば、軸ずれ防止機構によって、弁座の中心に対する定盤の回転軸のずれが防止されるので、弁座の摺り合わせを容易かつ精度良く行うことができる。また、定盤ガイド固定機構によって、定盤ガイドが弁箱に固定されているので、弁座摺り合わせ中に定盤ガイドが移動して定盤軸の保持位置が変動してしまうことを防止できる。さらに、定盤を弁座方向に押圧する押圧機構と、押圧機構による押圧力を調整する押圧力調整機構が設けられているので、所望の一定の押圧力で定盤を弁座に押しつけることが可能となり、作業者が押圧力を加える必要がない。このため、作業者の作業時間に制約を生じるような環境下であっても、容易に弁座の摺り合わせを行うことができる。   According to the present invention, the shaft misalignment preventing mechanism prevents the rotation axis of the surface plate from being displaced with respect to the center of the valve seat, so that the valve seat can be easily and accurately slid. In addition, since the surface plate guide is fixed to the valve box by the surface plate guide fixing mechanism, it is possible to prevent the surface plate guide from moving and changing the holding position of the surface plate shaft during the valve seat sliding. . Furthermore, since a pressing mechanism that presses the surface plate in the valve seat direction and a pressing force adjustment mechanism that adjusts the pressing force by the pressing mechanism are provided, the surface plate can be pressed against the valve seat with a desired constant pressing force. This is possible, and there is no need for the operator to apply a pressing force. For this reason, the valve seats can be easily slid even in an environment in which the working time of the operator is restricted.

以下、図を参照しながら、この発明の実施の一形態について説明する。図１において、玉形弁１０では、球状の弁箱１１の内部にＳ字状流路１２が形成されており、Ｓ字状流路１２の中間部分にリング形状の弁座１３が形成されている。また、弁箱１１には、弁体を挿入するための弁体挿入口１４が設けられている。弁体挿入口１４のフランジ１５には、弁体等が取り付けられているボンネット（図示せず）を弁箱１１に取る付ける際に、ボンネットを容易に正しい位置に位置出しできるようにインロー部１５ａが形成されている。また、フランジ１５には、ボンネットをボルトで固定するためのボルト穴１５ｂが形成されている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, in the ball valve 10, an S-shaped flow path 12 is formed inside a spherical valve box 11, and a ring-shaped valve seat 13 is formed in an intermediate portion of the S-shaped flow path 12. Yes. The valve box 11 is provided with a valve element insertion port 14 for inserting a valve element. When attaching a bonnet (not shown) to which a valve body or the like is attached to the valve box 11 to the flange 15 of the valve body insertion port 14, the spigot portion 15 a can be easily positioned at the correct position. Is formed. Further, the flange 15 is formed with a bolt hole 15b for fixing the bonnet with a bolt.

弁座摺り合わせ装置２０は、弁体のシート面と同様に形成されたテーパ面が先端に形成された定盤２１を用いて構成する。定盤２１のテーパ面２１ａには、弁座１３のシート面１３ａを研磨する研磨部材例えばサンドペーパを貼付する。また、定盤２１には、リング状の弁座１３に対して定盤２１を回転させながら当接できるようにするための定盤軸２２を突設して設ける。この定盤軸２２の外周面には、ストッパ２２ａを突設する。   The valve seat sliding device 20 is configured by using a surface plate 21 having a tapered surface formed at the tip, which is formed in the same manner as the seat surface of the valve body. A polishing member, such as sandpaper, for polishing the seat surface 13 a of the valve seat 13 is attached to the tapered surface 21 a of the surface plate 21. Further, the surface plate 21 is provided with a surface plate shaft 22 that protrudes from the ring-shaped valve seat 13 so that the surface plate 21 can contact the surface plate 21 while rotating. A stopper 22 a is projected from the outer peripheral surface of the surface plate shaft 22.

定盤ガイド２３は、インロー部１５ａに嵌合するように形成する。例えば、定盤ガイド２３の定盤側の面からインロー部１５ａの形状に合わせて突設させた嵌合部２３ａを形成する。なお、フランジ１５と定盤ガイド２３を挟持するようにして、定盤ガイド２３を弁箱１１に固定して取り付ける場合には、インロー部１５ａの形状に合わせて定盤ガイド２３の形状を設定するものとしても良い。   The surface plate guide 23 is formed so as to be fitted to the spigot portion 15a. For example, the fitting portion 23a is formed so as to protrude from the surface on the surface plate side of the surface plate guide 23 according to the shape of the spigot portion 15a. In addition, when fixing the surface plate guide 23 to the valve box 11 so as to sandwich the flange 15 and the surface plate guide 23, the shape of the surface plate guide 23 is set in accordance with the shape of the inlay portion 15a. It is good as a thing.

定盤ガイド２３には、定盤ガイド２３をインロー部１５ａに嵌合させた状態で弁箱１１に固定するための定盤ガイド固定機構を設ける。ここで、定盤ガイド２３を弁箱１１に固定する場合、フランジ１５のボルト穴１５ｂを利用すれば、弁箱１１の加工等を行うことなく容易に、定盤ガイド２３を固定できる。このように、フランジ１５のボルト穴１５ｂを利用する場合、定盤ガイド２３には、フランジ１５のボルト穴１５ｂと対向する位置にボルト穴２３ｂを形成する。また、フランジ１５のボルト穴１５ｂと対向する位置にボルトを立設するものとしても良い。   The surface plate guide 23 is provided with a surface plate guide fixing mechanism for fixing the surface plate guide 23 to the valve box 11 in a state where the surface plate guide 23 is fitted to the inlay portion 15a. Here, when the surface plate guide 23 is fixed to the valve box 11, if the bolt hole 15 b of the flange 15 is used, the surface plate guide 23 can be easily fixed without processing the valve case 11. As described above, when the bolt hole 15 b of the flange 15 is used, the bolt hole 23 b is formed in the surface plate guide 23 at a position facing the bolt hole 15 b of the flange 15. Moreover, it is good also as what stands a bolt in the position facing the bolt hole 15b of the flange 15. FIG.

さらに、定盤ガイド２３には、定盤軸２２を挿通するための軸穴２３ｈを形成して、軸穴２３ｈの内面側には、ねじを螺刻する。この軸穴２３ｈの中心は、定盤ガイド２３の嵌合部２３ａをインロー部１５ａに嵌合させて定盤ガイド２３を弁箱１１に固定したとき、弁座１３の中心と一致するように設定する。   Further, a shaft hole 23h for inserting the platen shaft 22 is formed in the surface plate guide 23, and a screw is screwed on the inner surface side of the shaft hole 23h. The center of the shaft hole 23h is set to coincide with the center of the valve seat 13 when the fitting portion 23a of the surface plate guide 23 is fitted to the spigot portion 15a and the surface plate guide 23 is fixed to the valve box 11. To do.

押圧力調整ねじ２４は、中空円筒状の形状として、円筒外面にねじを螺刻してねじ部２４ａを形成する。また、一方の端部に把持部２４ｂを設ける。この押圧力調整ねじ２４は、ねじ部２４ａを定盤ガイド２３の軸穴２３ｈに螺入させて、定盤ガイド２３に取り付ける。その後、軸穴２３ｈから突出したねじ部２４ａにリング状のストッパ２５を取り付ける。このようにして、定盤ガイド２３に押圧力調整ねじ２４を取り付ければ、押圧力調整ねじ２４の把持部２４ｂを回転させることで、ストッパ２５の位置を軸穴２３ｈの軸方向に進退させることができる。   The pressing force adjusting screw 24 has a hollow cylindrical shape and is screwed into the outer surface of the cylinder to form a screw portion 24a. In addition, a grip portion 24b is provided at one end. The pressing force adjusting screw 24 is attached to the surface plate guide 23 by screwing the screw portion 24 a into the shaft hole 23 h of the surface plate guide 23. Thereafter, a ring-shaped stopper 25 is attached to the screw portion 24a protruding from the shaft hole 23h. If the pressing force adjusting screw 24 is attached to the surface plate guide 23 in this way, the position of the stopper 25 can be advanced or retracted in the axial direction of the shaft hole 23h by rotating the grip portion 24b of the pressing force adjusting screw 24. it can.

定盤軸２２は、押圧力調整ねじ２４とストッパ２５を挿通するように取り付けて、定盤ガイド２３と押圧力調整ねじ２４によって回転自在に保持させる。ここで、定盤軸２２に形成されているストッパ２２ａとストッパ２５間には、コイルばね２６を挟持させる。   The surface plate shaft 22 is attached so that the pressing force adjusting screw 24 and the stopper 25 are inserted, and is held rotatably by the surface plate guide 23 and the pressing force adjusting screw 24. Here, a coil spring 26 is sandwiched between the stopper 22 a and the stopper 25 formed on the surface plate shaft 22.

定盤２１に対して弁座側には、弁座１３の中心に対する定盤２１の回転軸のずれを防止するための軸ずれ防止ガイド２７を設ける。この軸ずれ防止ガイド２７は、弁座１３に定盤２１を当接させて回転することにより弁座１３のシート面１３ａを研磨部材で研磨するときに、弁座１３の開口部分や弁座１３を設けた弁箱１１の開口部分に挿入されるものであり、許容可能な定盤２１のずれ量と、弁座１３の開口径あるいは弁座１３を設けた弁箱１１の開口部分の径とに基づいて、軸ずれ防止ガイド２７の径を設定する。すなわち、定盤２１を回転させたときのずれ量が許容可能なずれ量を超えるときには、軸ずれ防止ガイド２７が弁座１３の内面側あるいは弁座１３を設けた部分の弁箱１１と当接して、回転軸のずれが防止されるように軸ずれ防止ガイド２７を設定する。   On the valve seat side with respect to the surface plate 21, an axis deviation prevention guide 27 is provided for preventing the rotation axis of the surface plate 21 from deviating from the center of the valve seat 13. When the seat surface 13a of the valve seat 13 is polished with a polishing member by rotating the guide plate 27 with the surface plate 21 in contact with the valve seat 13, the opening portion of the valve seat 13 or the valve seat 13 is rotated. Are inserted into the opening portion of the valve box 11, and the allowable amount of deviation of the surface plate 21 and the opening diameter of the valve seat 13 or the diameter of the opening portion of the valve box 11 provided with the valve seat 13 are Based on the above, the diameter of the shaft misalignment prevention guide 27 is set. That is, when the shift amount when the surface plate 21 is rotated exceeds an allowable shift amount, the shaft misalignment prevention guide 27 comes into contact with the inner surface side of the valve seat 13 or the valve box 11 at the portion where the valve seat 13 is provided. Thus, the shaft misalignment prevention guide 27 is set so that the shaft misalignment is prevented.

定盤軸２２の回転は、モータ等（図示せず）を用いて行う。すなわち、モータの回転軸に定盤軸２２を連結して定盤軸２２を回転させる。また、モータの回転軸と定盤軸２２との間にギヤやベルト等の回転運動伝達手段を介在させれば、モータの回転速度とは異なる所望の速度で定盤２１を回転させることができる。   The surface plate shaft 22 is rotated using a motor or the like (not shown). That is, the platen shaft 22 is connected to the rotation shaft of the motor to rotate the platen shaft 22. Further, if a rotational movement transmitting means such as a gear or a belt is interposed between the rotation shaft of the motor and the surface plate shaft 22, the surface plate 21 can be rotated at a desired speed different from the rotation speed of the motor. .

次に、弁座摺り合わせ装置２０を用いて弁座１３の摺り合わせを行う場合の手順について図２を用いて説明する。弁座１３の摺り合わせを行う場合には、図２Ａに示すように、玉形弁１０の弁箱１１に形成された弁体挿入口１４から、弁座摺り合わせ装置２０の軸ずれ防止ガイド２７等を挿入する。次に、軸ずれ防止ガイド２７を図２Ｂに示すように、弁座１３の開口部分あるいは弁座１３を設けた弁箱１１の開口部分に挿入し、定盤ガイド２３をインロー部１５ａに嵌合させる。   Next, the procedure for sliding the valve seat 13 using the valve seat sliding apparatus 20 will be described with reference to FIG. When the valve seat 13 is slid, as shown in FIG. 2A, the shaft misalignment prevention guide 27 of the valve seat slider 20 is inserted from the valve element insertion port 14 formed in the valve box 11 of the ball valve 10. Insert etc. Next, as shown in FIG. 2B, the shaft misalignment prevention guide 27 is inserted into the opening portion of the valve seat 13 or the opening portion of the valve box 11 provided with the valve seat 13, and the surface plate guide 23 is fitted into the spigot portion 15a. Let

定盤ガイド２３は、インロー部１５ａから脱落しないよう図２Ｃに示すように、フランジ１５のボルト穴１５ｂと定盤ガイド２３のボルト穴２３ｂにボルト３１を挿通させて、ボルト３１とナット３２で弁箱１１に定盤ガイド２３を固定する。   As shown in FIG. 2C, the platen guide 23 is inserted into the bolt hole 15b of the flange 15 and the bolt hole 23b of the platen guide 23 so that the platen guide 23 does not fall off the inlay portion 15a. A platen guide 23 is fixed to the box 11.

その後、図２Ｄに示すように、押圧力調整ねじ２４の把持部２４ｂを回転して、押圧力調整ねじ２４を弁箱１１内にねじ込ませる。押圧力調整ねじ２４を弁箱１１内にねじ込むと、ストッパ２５が弁座方向に移動される。また、ストッパ２５が弁座方向に移動されると定盤軸２２も弁座方向に移動されて、弁座１３と定盤２１が当接する。また、弁座１３と定盤２１の当接後、さらに押圧力調整ねじ２４を弁箱１１内にねじ込むと、ストッパ２５は弁座方向に移動されるが、弁座１３と定盤２１が当接しているので、定盤軸２２に設けたストッパ２２ａの位置は移動しない。また、ストッパ２２ａとストッパ２５との間にはコイルバネ２６が設けられているので、押圧力調整ねじ２４が弁箱１１内にねじ込まれるに伴い、弁座１３を定盤２１で押圧する押圧力が大きくなる。   Thereafter, as shown in FIG. 2D, the gripping portion 24 b of the pressing force adjusting screw 24 is rotated to screw the pressing force adjusting screw 24 into the valve box 11. When the pressing force adjusting screw 24 is screwed into the valve box 11, the stopper 25 is moved in the valve seat direction. When the stopper 25 is moved in the valve seat direction, the surface plate shaft 22 is also moved in the valve seat direction so that the valve seat 13 and the surface plate 21 come into contact with each other. When the pressing force adjusting screw 24 is further screwed into the valve box 11 after contacting the valve seat 13 and the surface plate 21, the stopper 25 is moved in the valve seat direction, but the valve seat 13 and the surface plate 21 are in contact with each other. Since they are in contact with each other, the position of the stopper 22a provided on the surface plate shaft 22 does not move. Further, since the coil spring 26 is provided between the stopper 22a and the stopper 25, the pressing force that presses the valve seat 13 with the surface plate 21 as the pressing force adjusting screw 24 is screwed into the valve box 11 is applied. growing.

このように、押圧機構すなわちストッパ２２ａ，２５およびコイルバネ２６によって、定盤２１を弁座方向に押圧することができる。また、押圧力調整ねじ２４の把持部２４ｂを回転して、定盤ガイド２３に対し押圧力調整ねじ２４を進退させることで、ストッパ２５が定盤軸２２の軸方向に移動することから、押圧力調整機構である押圧力調整ねじ２４を用いて、所望の一定の押圧力で弁座１３を定盤２１で押圧することができる。   Thus, the surface plate 21 can be pressed in the valve seat direction by the pressing mechanism, that is, the stoppers 22a and 25 and the coil spring 26. Further, by rotating the grip portion 24b of the pressing force adjusting screw 24 and moving the pressing force adjusting screw 24 forward and backward with respect to the surface plate guide 23, the stopper 25 moves in the axial direction of the surface plate shaft 22. The valve seat 13 can be pressed by the surface plate 21 with a desired constant pressing force by using a pressing force adjusting screw 24 which is a pressure adjusting mechanism.

その後、図２Ｅに示すように、定盤軸２２を回転駆動部（図示せず）で回転させると、定盤２１のテーパ面２１ａに貼付されている研磨部材が弁座１３のシート面１３ａを研磨することとなり、弁座の摺り合わせを行うことができる。また、定盤５１の回転軸を弁座１３の中心から位置ずれさせるように力が加わっても、軸ずれ防止ガイド２７によって回転軸のずれが防止されるので、弁座の摺り合わせを精度良く行うことができる。また、軸ずれ防止ガイド２７は、定盤２１に対して弁座側に設けられており、軸ずれ防止ガイド２７と弁座１３や弁座１３を設けた部分の弁箱１１とによって軸ずれが防止されるので、構成が簡単で精度良く軸ずれを防止できる。なお、図２では、軸ずれ防止ガイド２７を弁座１３を設けた部分の弁箱１１と当接させる場合を示している。   Thereafter, as shown in FIG. 2E, when the platen shaft 22 is rotated by a rotation drive unit (not shown), the polishing member affixed to the tapered surface 21 a of the surface plate 21 causes the seat surface 13 a of the valve seat 13 to move. It will polish and a valve seat can be rubbed. Further, even if a force is applied so that the rotation axis of the surface plate 51 is displaced from the center of the valve seat 13, the axis deviation prevention guide 27 prevents the rotation axis from being displaced. It can be carried out. Further, the shaft misalignment prevention guide 27 is provided on the valve seat side with respect to the surface plate 21, and the shaft misalignment is prevented by the shaft misalignment prevention guide 27 and the valve box 11 where the valve seat 13 or the valve seat 13 is provided. Therefore, the configuration is simple and the shaft misalignment can be prevented with high accuracy. FIG. 2 shows a case where the shaft misalignment prevention guide 27 is brought into contact with the valve box 11 in the portion where the valve seat 13 is provided.

さらに、定盤ガイド２３は弁箱１１に固定されており、押圧力調整ねじ２４を調整することで、所望の一定の押圧力で弁座１３を定盤２１で押圧することができる。従って、作業者は弁座の摺り合わせ中に定盤ガイドを保持したり、定盤２１を弁座１３に押しつける操作を行う必要がない。このため、作業者の作業時間に制約を生じるような環境下、例えば高線量や高温等の環境下に設置されている玉形弁についても容易に弁座の摺り合わせを行うことができる。   Further, the surface plate guide 23 is fixed to the valve box 11, and the valve seat 13 can be pressed by the surface plate 21 with a desired constant pressing force by adjusting the pressing force adjusting screw 24. Therefore, it is not necessary for the operator to hold the surface plate guide or to press the surface plate 21 against the valve seat 13 during the sliding of the valve seat. For this reason, it is possible to easily slide the valve seats even in the case of a ball valve installed in an environment that restricts the working time of the operator, for example, in an environment such as a high dose or high temperature.

なお、上述の実施の形態では、玉形弁の弁座を研磨する場合について説明したが、リング状の弁座を用いる弁であれば、上述の玉形弁の場合と同様にして、弁座の摺り合わせを容易に行うことができる。   In the above-described embodiment, the case of polishing the valve seat of the spherical valve has been described. However, if the valve uses a ring-shaped valve seat, the valve seat is similar to the above-described case of the spherical valve. Can be easily performed.

以上のように、本発明に係る弁座摺り合わせ装置は、弁閉鎖時の密閉性を確保するために有用であり、玉形弁の弁座摺り合わせに好適である。   As described above, the valve seat sliding apparatus according to the present invention is useful for ensuring the sealing performance when the valve is closed, and is suitable for valve seat sliding of a ball valve.

玉形弁と弁座摺り合わせ装置を示す図である。It is a figure which shows a ball-shaped valve and a valve seat sliding apparatus. 弁座摺り合わせ手順を説明するための図である。It is a figure for demonstrating the valve seat sliding alignment procedure. 玉形弁と従来の弁座摺り合わせ装置を示す図である。It is a figure which shows a ball-shaped valve and the conventional valve seat sliding apparatus. 従来の弁座摺り合わせ動作を説明するための図である。It is a figure for demonstrating the conventional valve seat sliding operation | movement. 定盤の回転軸と弁座の中心が一致しない状態での弁座摺り合わせ動作を説明するための図である。It is a figure for demonstrating the valve seat sliding operation | movement in the state in which the rotating shaft of a surface plate and the center of a valve seat do not correspond.

符号の説明Explanation of symbols

１０・・・玉形弁、１１・・・弁箱、１２・・・Ｓ字状流路、１３・・・弁座、１３ａ・・・シート面、１４・・・弁体挿入口、１５・・・フランジ、１５ａ・・・インロー部、１５ｂ，２３ｂ・・・ボルト穴、２０，５０・・・弁座摺り合わせ装置、２１，５１・・・定盤、２１ａ，５１ａ・・・テーパ面、２２，５２・・・定盤軸、２２ａ，２５・・・ストッパ、２３，５３・・・定盤ガイド、２３ｈ・・・軸穴、２４・・・圧力調整ねじ、２４ａ・・・ねじ部、２４ｂ・・・把持部、２６・・・コイルバネ、２７・・・軸ずれ防止ガイド、３１・・・ボルト、３２・・・ナット、
DESCRIPTION OF SYMBOLS 10 ... Ball valve, 11 ... Valve box, 12 ... S-shaped flow path, 13 ... Valve seat, 13a ... Seat surface, 14 ... Valve body insertion port, 15. .... Flange, 15a ... Inlay part, 15b, 23b ... Bolt hole, 20, 50 ... Valve seat sliding device, 21, 51 ... Surface plate, 21a, 51a ... Tapered surface, 22, 52 ... Platen shaft, 22a, 25 ... Stopper, 23, 53 ... Platen guide, 23h ... Shaft hole, 24 ... Pressure adjusting screw, 24a ... Screw part, 24b ... gripping part, 26 ... coil spring, 27 ... shaft misalignment prevention guide, 31 ... bolt, 32 ... nut,

Claims (3)

研磨部材が設けられた定盤と、該定盤から突設して設けられた定盤軸と、該定盤軸を回転可能に支持する定盤ガイドを有し、前記定盤を弁座に当接させて回転することにより前記弁座のシート面を前記研磨部材で研磨して弁座摺り合わせを行う弁座摺り合わせ装置において、
前記定盤に対して弁座側に、前記弁座の中心に対する前記定盤の回転軸のずれを防止する軸ずれ防止機構を設けた
ことを特徴とする弁座摺り合わせ装置。 A platen provided with a polishing member; a platen shaft provided by projecting from the platen; and a platen guide for rotatably supporting the platen shaft, wherein the platen is used as a valve seat. In the valve seat sliding apparatus that polishes the seat surface of the valve seat with the polishing member and rotates the valve seat by contacting and rotating,
The valve seat sliding device characterized by providing the shaft-slip prevention mechanism which prevents the rotation of the rotating shaft of the surface plate with respect to the center of the valve seat on the valve seat side with respect to the surface plate. 前記定盤ガイドを前記弁座が設けられている弁箱に固定する定盤ガイド固定機構を設けた
ことを特徴とする請求項１記載の弁座摺り合わせ装置。 2. The valve seat sliding device according to claim 1, further comprising a surface plate guide fixing mechanism for fixing the surface plate guide to a valve box provided with the valve seat. 前記定盤を弁座方向に押圧する押圧機構と、
前記押圧機構による押圧力を調整する押圧力調整機構を設けた
ことを特徴とする請求項２記載の弁座摺り合わせ装置。
A pressing mechanism for pressing the surface plate in the valve seat direction;
The valve seat sliding device according to claim 2, further comprising a pressing force adjusting mechanism that adjusts a pressing force by the pressing mechanism.
JP2005061277A 2005-03-04 2005-03-04 Valve seat lapping device Pending JP2006239836A (en)

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KR101974790B1 (en) * 2018-10-05 2019-05-02 한전케이피에스 주식회사 Apparatus and method for lapping of valve plug
CN110202447A (en) * 2019-01-28 2019-09-06 上海烟草集团有限责任公司 Valve body maintenance frock
CN110185804A (en) * 2019-05-14 2019-08-30 佛山一精模具配件有限公司 A kind of resistance to compression pneumatic jack valve
KR20210085908A (en) * 2019-12-31 2021-07-08 한전산업개발 주식회사 Rapping device for valve seats for power plant boiler
KR102315241B1 (en) * 2019-12-31 2021-10-20 한전산업개발 주식회사 Rapping device for valve seats for power plant boiler

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