JPH0419476A - Valve seat structure for valve box and manufacture thereof - Google Patents
Valve seat structure for valve box and manufacture thereofInfo
- Publication number
- JPH0419476A JPH0419476A JP12493390A JP12493390A JPH0419476A JP H0419476 A JPH0419476 A JP H0419476A JP 12493390 A JP12493390 A JP 12493390A JP 12493390 A JP12493390 A JP 12493390A JP H0419476 A JPH0419476 A JP H0419476A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- amorphous alloy
- stellite
- box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000011888 foil Substances 0.000 claims description 20
- 238000005219 brazing Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 239000003779 heat-resistant material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229910001347 Stellite Inorganic materials 0.000 description 28
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 28
- 238000000034 method Methods 0.000 description 10
- 238000003466 welding Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000001465 metallisation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
ａ、 産業上の利用分野
本発明は、火力発電所や原子力発電所等において高温・
高圧条件下で使用される弁箱の弁座構造及びその製造方
法に関するものである。[Detailed description of the invention] a. Industrial application field The present invention is applicable to high temperature and
The present invention relates to a valve seat structure of a valve box used under high pressure conditions and a manufacturing method thereof.
ｂ、 従来の技術
火力発電所や原子力発電所では、高温・高圧のガスや蒸
気等の遮断装置として玉形弁が広く用いられている。第
５図は、この種の従来の玉形弁１を示すものであって、
この玉形弁１は、弁箱本体２と筒状部材３とを互いに溶
接結合して成る弁箱４と、この弁箱４内に一端側が摺動
自在に挿入配置された弁棒５とを具備している。上述の
弁箱本体２には人口ボート６及び出口ボート７が形成さ
れており、これら両ポート６．７は流体通路８を介して
互いに連通されている。そして、この流体通路８の途中
箇所に弁座９が配設されている。b. Conventional technology In thermal power plants and nuclear power plants, globe valves are widely used as cutoff devices for high temperature, high pressure gas, steam, etc. FIG. 5 shows a conventional globe valve 1 of this type,
This globe valve 1 includes a valve body 4 formed by welding a valve body body 2 and a cylindrical member 3 to each other, and a valve stem 5 having one end slidably inserted into the valve body 4. Equipped with An artificial boat 6 and an outlet boat 7 are formed in the above-mentioned valve body body 2, and these ports 6.7 are communicated with each other via a fluid passage 8. A valve seat 9 is disposed in the middle of this fluid passage 8.
方、弁棒５の他端にはハンドル１ｏが取付けられており
、このハンドル１０の回動により弁棒５が軸心方向（第
５図において矢印Ａ又はＢ方向に沿って移動されるよう
になっている。On the other hand, a handle 1o is attached to the other end of the valve stem 5, and rotation of the handle 10 moves the valve stem 5 in the axial direction (in the direction of arrow A or B in FIG. 5). It has become.
しかして、弁棒５が矢印Ａ方向に移動されてその先端５
ａが弁座９に密着係合されると、流体通路８が遮断（閉
塞）されて閉弁状態となり、また、弁棒５が矢印Ｂ方向
に移動されてその先端５ａが弁座９から離れた位置に配
置されると前記先端５ａと弁座９との間の間隙を介して
入口ポート６と出口ボート７とが互いに連通されて開弁
状態となるように構成されている。Thus, the valve stem 5 is moved in the direction of arrow A, and its tip 5
When a is closely engaged with the valve seat 9, the fluid passage 8 is blocked (occluded) and the valve is closed, and the valve stem 5 is moved in the direction of arrow B so that its tip 5a is separated from the valve seat 9. When placed in this position, the inlet port 6 and the outlet boat 7 are communicated with each other through the gap between the tip 5a and the valve seat 9, and the valve is in an open state.
ところで、この玉形弁１は高温・高圧の条件下で使用さ
れるものであり、閉弁時には弁座９及び弁棒５の先端５
ａに可成り大きな圧着力を作用させる必要がある関係上
、弁座９及び弁棒５の先端５ａを高硬度でかつ耐熱性に
富むように設計する必要がある。そこで、従来では、通
常、これらの部分をステライト等の如き超硬耐熱合金に
て構成するようにしている。By the way, this globe valve 1 is used under high temperature and high pressure conditions, and when the valve is closed, the valve seat 9 and the tip 5 of the valve stem 5
Since it is necessary to apply a fairly large pressure force to the valve seat 9, it is necessary to design the valve seat 9 and the tip 5a of the valve stem 5 to have high hardness and high heat resistance. Conventionally, therefore, these parts are usually constructed of a cemented carbide heat-resistant alloy such as Stellite.
なお、例えばステライト製の弁座９を構成するに当たっ
ては、弁箱本体２の弁座部１１にステライト材をアセチ
レンガス溶接或いは電気抵抗溶接等の手段にてステライ
ト材を溶融させて盛金し、しかる後にこの盛金した部分
を加工にて面取りを行なって弁棒５の先端５ａとの”す
り合せ″を行なうようにしていた。In order to construct the valve seat 9 made of Stellite, for example, the Stellite material is melted and deposited onto the valve seat portion 11 of the valve body body 2 by means such as acetylene gas welding or electric resistance welding. Thereafter, the metallized portion is chamfered to allow it to "grind" with the tip 5a of the valve stem 5.
Ｃ１発明が解決しようとする課題
しかしながら、上述の如き方法では、次のような問題点
があった。C1 Problems to be Solved by the Invention However, the above method has the following problems.
すなわち、弁箱本体２の弁座部１１は弁箱４の奥部にあ
るため、弁箱４の筒状部材３が小径の場合には、弁箱４
の弁棒挿入用穴１２の深さり、と、この穴１２の直径Ｌ
２との比が３倍以上になるとアセチレンガスの火炎が盛
金面に到達せず、従って盛金を行なうことが不可能とな
る。このため、やむなく弁箱４を弁箱本体２と筒状部材
３とに２分割し、弁箱本体２の弁座部１１に弁座９の形
成のための盛金作業を行なった後に、この弁箱本体２に
筒状部材３を溶接にて結合することにより弁箱４を構成
するようにしているのが実状である。そのため、部品点
数が多くなる上に、製造工数が多くなるといった大きな
問題点があった。That is, since the valve seat part 11 of the valve body body 2 is located at the inner part of the valve body 4, when the cylindrical member 3 of the valve body 4 has a small diameter, the valve seat 11 of the valve body 2
The depth of the valve stem insertion hole 12 and the diameter L of this hole 12
If the ratio to 2 is 3 times or more, the flame of the acetylene gas will not reach the metallization surface, and therefore, metallization will not be possible. For this reason, the valve box 4 had to be divided into two parts, the valve box main body 2 and the cylindrical member 3, and after performing the filling work for forming the valve seat 9 on the valve seat part 11 of the valve box main body 2. In reality, the valve body 4 is constructed by joining the cylindrical member 3 to the valve body body 2 by welding. Therefore, there were major problems such as an increase in the number of parts and the number of manufacturing steps.
また、弁座９と弁棒５の先端５ａとが互いに密着し得る
ように、盛金作業の後にこれら両者間の“すり合せ”作
業（研磨作業）を行なう必要があるため、製造作業が非
常に面倒であり、製造コストが著しく高くなってしまう
不都合があった。In addition, in order for the valve seat 9 and the tip 5a of the valve stem 5 to come into close contact with each other, it is necessary to perform "grinding" work (polishing work) between them after the metal filling work, which makes the manufacturing work extremely difficult. This has the disadvantage of being extremely troublesome and significantly increasing manufacturing costs.
本発明は、このような実状に鑑みてなされたものであっ
て、その目的は、弁箱を２分割する必要がなく、しかも
弁座の切削や“すり合せ”作業を行なう必要がなく、製
作容易で安価なものでありながら、高温・高圧状態の下
で剥離等の不都合を生じることなく弁座としての機能を
充分に果し得るような弁箱の弁座構造及びその製造方法
を提供することにある。The present invention was made in view of the above-mentioned circumstances, and its purpose is to eliminate the need to divide the valve box into two parts, eliminate the need to cut the valve seat, and eliminate the need for "grinding" work. To provide a valve seat structure of a valve box that is easy and inexpensive and can sufficiently perform the function as a valve seat without causing any inconvenience such as peeling under high temperature and high pressure conditions, and a method for manufacturing the same. There is a particular thing.
ｄ、 課題を解決するための手段
上述の目的を達成するために、本発明に係る弁箱の弁座
構造においては、弁箱の弁座部にアモルファス合金層を
介して超硬材料又は耐熱材料から成る弁座をろう付けす
るようにしている。d. Means for Solving the Problems In order to achieve the above-mentioned object, in the valve seat structure of the valve box according to the present invention, a cemented carbide material or a heat-resistant material is applied to the valve seat portion of the valve box via an amorphous alloy layer. The valve seat, which is made of
また、本発明に係る弁座構造の製造方法、によれば、所
定形状に予め成形された超硬材料又は耐熱材料から成る
弁座をアモルファス合金箔を介して弁箱の弁座部上に載
置し、前記弁座を前記アモルファス合金箔及び弁座部に
向けて加圧した状態の下で前記アモルファス合金箔を加
熱溶融させて冷却することにより、前記弁座を前記弁座
部にろう付けするようにしている。Further, according to the method for manufacturing a valve seat structure according to the present invention, a valve seat made of a carbide material or a heat-resistant material, which has been preformed into a predetermined shape, is mounted on the valve seat portion of the valve body via an amorphous alloy foil. brazing the valve seat to the valve seat portion by heating and melting the amorphous alloy foil and cooling it under a state in which the valve seat is placed under pressure toward the amorphous alloy foil and the valve seat portion; I try to do that.
以下、本発明の一実施例に付き第１図〜第４図を参照し
て説明する。なお、これらの図において、第５図と共通
する部分には同一の符号を付してその詳細な説明は省略
する。Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 4. In these figures, parts common to those in FIG. 5 are designated by the same reference numerals, and detailed explanation thereof will be omitted.
第１図は本発明を高温・高圧用玉形弁１に適用した実施
例を示すものである。本例では、弁箱本体部４ａと円筒
部４ｂとを一体成形して成る弁箱４が用いられており、
弁箱４の弁座部１１が弁箱本体部４ａに設けられている
。そして、この弁座部１１にはアモルファス合金（非晶
質合金）層１３を介してステライト片１４が弁座として
ろう付けされている。FIG. 1 shows an embodiment in which the present invention is applied to a globe valve 1 for high temperature and high pressure. In this example, a valve box 4 is used which is formed by integrally molding a valve box main body part 4a and a cylindrical part 4b,
A valve seat portion 11 of the valve box 4 is provided on the valve box main body portion 4a. A stellite piece 14 is brazed to the valve seat portion 11 via an amorphous alloy layer 13 as a valve seat.
ここで、弁箱４の弁座構造を更に詳細に説明すると、弁
箱４の弁箱本体部４ａに形成された流体通路８の角部に
環状の凹部１５が設けられており、この凹部１５の底面
１５ａ上にアモルファス合金層１３が接着結合されてい
る。さらに、このアモルファス合金層１３上には、予め
所定形状に成形された環状のステライト片１４が接着結
合されている。これによって、ステライト片１４がアモ
ルファス合金にてろう付けされ、このステライト片１４
が弁座となされている。Here, to explain the valve seat structure of the valve box 4 in more detail, an annular recess 15 is provided at a corner of the fluid passage 8 formed in the valve box main body 4a of the valve box 4. An amorphous alloy layer 13 is adhesively bonded to the bottom surface 15a of the substrate. Further, on this amorphous alloy layer 13, an annular stellite piece 14 previously formed into a predetermined shape is adhesively bonded. As a result, the stellite piece 14 is brazed with the amorphous alloy, and the stellite piece 14
is said to be the valve seat.
一方、弁棒５の先端５ａにも、予め所定形状（例えば円
錐台形状）に成形されたステライト片１６がアモルファ
ス合金層１７を介して同様に接着結合されている。そし
て、このようにアモルファス合金にて弁棒５の先端５ａ
にろう付けされたステライト片１６が前記ステライト片
１４（弁座）のシート面１４ａに密着係合されるように
構成されている。On the other hand, a stellite piece 16 previously formed into a predetermined shape (for example, a truncated cone shape) is also adhesively bonded to the tip 5a of the valve stem 5 via an amorphous alloy layer 17. In this way, the tip 5a of the valve stem 5 is made of amorphous alloy.
The stellite piece 16 soldered to the stellite piece 16 is tightly engaged with the seat surface 14a of the stellite piece 14 (valve seat).
次に、上述の如く弁箱４の弁座構造を製造する方法に付
き述べる。Next, a method of manufacturing the valve seat structure of the valve body 4 as described above will be described.
まず、第２図及び第３図に示すように、弁箱４の環状凹
部１５の底面１５ａ上に所定寸法に打ち抜き成形された
リング板状のアモルファス合金箔１８を載置すると共に
、予め所定の寸法・形状に成形した環状のステライト片
１４を前記アモルファス合金箔１８上に載置する０次い
で、下端にセラミック板１９が取付けられた重錘２０を
弁棒挿入用穴１２内に挿入してステライト片１４上に載
置し、この重錘２０の自重によって、ステライト片１４
及びアモルファス合金箔１８を弁箱４の環状凹部１５の
底面１５ａ と重錘２０の下端のセラミック板１９との
間に、加圧状態の下で挟持状態にする。そして、このよ
うにしてアモルファス合金箔１８． ステライト片１
４及び重錘２０が組込まれた弁箱４を第２図に示すよう
に加熱炉２１内の載置台２２上に載置して固定する。First, as shown in FIGS. 2 and 3, a ring plate-shaped amorphous alloy foil 18 punched to a predetermined size is placed on the bottom surface 15a of the annular recess 15 of the valve box 4, and a predetermined An annular stellite piece 14 molded to the desired size and shape is placed on the amorphous alloy foil 18.Next, a weight 20 with a ceramic plate 19 attached to the lower end is inserted into the valve rod insertion hole 12 to remove the stellite. The Stellite piece 14 is placed on the piece 14, and due to the weight of this weight 20, the stellite piece 14
The amorphous alloy foil 18 is held between the bottom surface 15a of the annular recess 15 of the valve body 4 and the ceramic plate 19 at the lower end of the weight 20 under pressure. In this way, the amorphous alloy foil 18. Stellite piece 1
The valve box 4 in which the valve body 4 and the weight 20 are assembled is placed and fixed on a mounting table 22 in a heating furnace 21, as shown in FIG.
しかる後に、加熱炉２１内を真空状態にし、加熱炉２１
内のヒーター２３により加熱炉２１内の温度を上げてア
モルファス合金箔１８のみを溶融させる。アモルファス
合金箔１８が溶融するのに伴い、アモルファス合金が弁
箱４の前記底面１５ａ及びステライト片Ｉ４の下面に付
着する （第３図参照）、このような状態になった時点
でヒーター２３による加熱を停止し、所定温度になる迄
自然放冷させる。そして、加熱炉２１内が所定温度にな
った時点で窒素ガスを加熱炉２１内に注入し、約１バー
ルの圧力条件下で急速冷却させる。これにより、アモル
ファス合金が固化されて前記底面１５ａ とステライト
片１４との間にアモルファス合金層１３（第１図参照）
が形成され、ステライト片１４はアモルファス合金にて
弁箱４の凹部（弁座部）１５にろう付けされる。After that, the inside of the heating furnace 21 is made into a vacuum state, and the heating furnace 21 is
The temperature inside the heating furnace 21 is raised by the heater 23 inside, and only the amorphous alloy foil 18 is melted. As the amorphous alloy foil 18 melts, the amorphous alloy adheres to the bottom surface 15a of the valve box 4 and the lower surface of the stellite piece I4 (see FIG. 3). When this state is reached, heating by the heater 23 is performed. is stopped and allowed to cool naturally until the specified temperature is reached. Then, when the inside of the heating furnace 21 reaches a predetermined temperature, nitrogen gas is injected into the heating furnace 21 to cause rapid cooling under a pressure condition of about 1 bar. As a result, the amorphous alloy is solidified, and an amorphous alloy layer 13 (see FIG. 1) is formed between the bottom surface 15a and the stellite piece 14.
is formed, and the stellite piece 14 is brazed to the recess (valve seat) 15 of the valve box 4 using an amorphous alloy.
次いで、前記底面１５ａ とアモルファス合金層１３と
の接合部分並びにアモルファス合金層１３とステライト
片１４との接合部分の結晶組織の大きなものやひずみの
あるものを常態化するために、焼ならし処理を行ない、
弁座の製造を終了する。Next, in order to normalize the large or distorted crystal structure of the joint portion between the bottom surface 15a and the amorphous alloy layer 13 and the joint portion between the amorphous alloy layer 13 and the stellite piece 14, a normalizing treatment is performed. conduct,
Ended manufacturing of valve seats.
以上においては、弁座の製造方法を概念的に述べたが以
下に本方法の具体例を示す。Although the method for manufacturing a valve seat has been conceptually described above, a specific example of this method will be shown below.
これら３種類の素材から成るアモルファス合金箔１８を
用いて第４図に示すような加熱パターンにて処理したと
ころ、何れの場合にもステライト片がアモルファス合金
にて完全な状態でろう付けされていることが確認された
。When the amorphous alloy foil 18 made of these three types of materials was processed in the heating pattern shown in FIG. 4, the stellite pieces were completely brazed with the amorphous alloy in each case. This was confirmed.
一方、弁棒５の先端５ａへのステライト片１６のろう付
けは、ステライト片１６をアモルファス合金箔を介して
弁棒５の先端に押し付けて加圧した状態の下で加熱炉に
て加熱して冷却することにより行なう。しかる後、弁箱
４と弁棒５とを組合せて玉形弁１を構成する。On the other hand, the stellite piece 16 is brazed to the tip 5a of the valve stem 5 by pressing the stellite piece 16 against the tip of the valve stem 5 through an amorphous alloy foil and heating it in a heating furnace under pressure. This is done by cooling. Thereafter, the valve body 4 and the valve stem 5 are combined to form the globe valve 1.
このようにして得られる玉形弁１によれば、弁箱４が一
体成形品であるため、従来のように弁箱本体２と筒状部
材３とを溶接結合する作業を必要とせず、従って部品点
数及び製造工数の削減を図ることができ、製造コストの
低減が可能となる。According to the globe valve 1 obtained in this manner, since the valve body 4 is an integrally molded product, there is no need for welding and joining the valve body body 2 and the cylindrical member 3 as in the conventional case. The number of parts and manufacturing man-hours can be reduced, and manufacturing costs can be reduced.
その上、ろう材としてアモルファス合金を用いるように
しているので、ろう付け強度が極めて強く、しかも高温
・高圧条件下での耐食性が非常に優れたものとなる。Furthermore, since an amorphous alloy is used as the brazing material, the brazing strength is extremely strong and corrosion resistance under high temperature and high pressure conditions is excellent.
また、弁座となるステライト片１４をアモルファス合金
箔１８にてろう付けするようにした方法によれば、極め
て簡単な操作により弁箱の弁座を構成することができる
と共に、このステライト片１４を予め所要の形状及び寸
法に成形しておくことによって、ろう付け後に“すり合
せ”のための面倒な研磨加工を行なう必要がなく、製造
作業がより一層容易となる。また、有機質バインダを使
用していないのでボイドの発生が殆どなく、しかもアモ
ルファス合金箔１８は溶融による収縮を生しることがな
く、さらにアモルファス合金箔１８の肉厚は薄（均一な
ので、ろう付け精度が良く、むらのないろう付け（接合
）を行なうことができる。従って、不良率の大巾な低減
を図ることができる。Further, according to the method in which the stellite piece 14 that becomes the valve seat is brazed with the amorphous alloy foil 18, the valve seat of the valve box can be constructed with an extremely simple operation, and the stellite piece 14 can be By forming the parts into the required shape and dimensions in advance, there is no need to perform troublesome polishing for "grinding" after brazing, making the manufacturing process even easier. In addition, since no organic binder is used, there are almost no voids, and the amorphous alloy foil 18 does not shrink due to melting. It is possible to perform brazing (joining) with high accuracy and uniformity.Therefore, it is possible to significantly reduce the defective rate.
なお、本実施例の場合には真空の加熱炉２１を加熱手段
として用いるようにしているので、次のような利点があ
る。すなわち、作業条件、例えば加熱温度及び保持時間
等を予め設定しておけば、常に同一処理条件を繰り返し
行なわしめることができるので、加熱炉２１の操作を全
て自動化することが可能である。また、真空中での加熱
のため、熱の伝達が輻射のみで行なわれることとなり、
他の加熱方法に比べて処理材の昇温の仕方は非常に緩や
かで、変形が非常に少ない。さらに、真空加熱によりろ
う付けしたものは、光輝性が保たれ、変形も可成り少な
いので、ろう付け処理後の加工や後処理工程を省略でき
る。In this embodiment, since the vacuum heating furnace 21 is used as the heating means, there are the following advantages. That is, if the working conditions, such as heating temperature and holding time, are set in advance, the same processing conditions can be repeated at all times, so it is possible to fully automate the operation of the heating furnace 21. In addition, since heating is performed in a vacuum, heat is transferred only by radiation.
Compared to other heating methods, the temperature of the treated material is raised very slowly, and there is very little deformation. Furthermore, since the material brazed by vacuum heating maintains its luster and is considerably less deformed, post-brazing processing and post-processing steps can be omitted.
さらに、本実施例においては、ろう付け処理後に焼なら
し処理を施すようにしているので、接合部分の針状化し
た結晶組織が常態化され、ステライト片１４の剥離強度
の向上が図られる。Furthermore, in this embodiment, since the normalizing treatment is performed after the brazing treatment, the acicular crystal structure of the joint portion is normalized, and the peel strength of the stellite pieces 14 is improved.
以上、本発明の一実施例に付き述べたが、本発明は既述
の実施例に限定されるものではなく、本発明の技術思想
に基いて各種の変形及び変更が可能である。Although one embodiment of the present invention has been described above, the present invention is not limited to the embodiment described above, and various modifications and changes can be made based on the technical idea of the present invention.
例えば、ろう材となるアモルファス合金の種類は必要に
応して各種の成分のものを使用可能であり、ステライト
以外の素材から成る超硬耐熱合金を弁座として用いるよ
うにしてもよい。また、加熱手段としては加熱炉２１に
限らず、電子ビーム等の如く各種の加熱手段を用いるこ
とが可能である。For example, the amorphous alloy used as the brazing filler material may have various components as required, and a heat-resistant cemented carbide made of a material other than stellite may be used as the valve seat. Further, the heating means is not limited to the heating furnace 21, and various heating means such as an electron beam or the like can be used.
ｅ、 発明の効果
以上の如く、本発明に係る弁箱の弁座構造は、弁箱の弁
座部にアモルファス合金層を介して超硬材料又は耐熱材
料から成る弁座部材をろう付けするようにしたものであ
るから、従来のように弁箱を２分割する必要がなくなり
、部品点数及び製造工数の低減を図ることができ、弁の
コストダウンが可能となる。しかも、ろう材となるアモ
ルファス合金の特質により、弁座部材のろう付け強度が
極めて強く、かつ、高温・高圧条件下でも極めて優れた
耐食性を有するような弁座構造を得ることができる。e. Effects of the Invention As described above, the valve seat structure of the valve box according to the present invention is such that a valve seat member made of a carbide material or a heat-resistant material is brazed to the valve seat portion of the valve box via an amorphous alloy layer. Therefore, it is no longer necessary to divide the valve box into two as in the conventional case, and the number of parts and manufacturing man-hours can be reduced, making it possible to reduce the cost of the valve. Furthermore, due to the characteristics of the amorphous alloy used as the brazing material, it is possible to obtain a valve seat structure in which the brazing strength of the valve seat member is extremely strong and has extremely excellent corrosion resistance even under high temperature and high pressure conditions.
また、本発明に係る弁座構造の製造方法によれば、予め
所要の形状及び寸法に成形された弁部をアモルファス合
金箔にてろう付けするようにしたものであるから、弁座
をむらな（均一にかつ確実にろう付けすることができる
上に、ろう付け処理後に弁座と弁棒との“すり合せ”の
ための研磨加工を行なう必要がなくなるため、極めて簡
単にかつ能率良く弁座の製造を行なうことができる。そ
の上、アモルファス合金箔による弁座のろう付けは、均
一にかつむらなくしかも強い接合強度をもって行なわれ
るので、不良品の発生率を大巾に低減することができ、
生産性を大巾に改善することができる。Furthermore, according to the method for manufacturing a valve seat structure according to the present invention, the valve part is pre-formed to the desired shape and dimensions and is brazed with amorphous alloy foil, so the valve seat can be formed evenly. (In addition to being able to braze uniformly and reliably, there is no need to perform polishing to "grind" the valve seat and valve stem after the brazing process, making it extremely easy and efficient to braze the valve seat.) In addition, since brazing of the valve seat with amorphous alloy foil is done evenly and evenly with strong joint strength, the incidence of defective products can be greatly reduced. ,
Productivity can be greatly improved.
第１図〜第４図は本発明の一実施例を説明するためのも
のであって、第１図は玉形弁の構造を示す断面図、第２
図は弁箱の弁座を製造する際の方法を示す概念図、第３
図は弁箱の弁座部の要部拡大断面図、第４図は加熱炉に
よる加熱パターンを示す特性図、第５図は従来例を示す
玉形弁の断面図である。
■・・・玉形弁、 ４・・・弁箱、５・・・弁
棒、 ５ａ・・・先端、１１・・・弁座部、
１３・・・アモルファス合金層、１４・・・弁座
としてのステライト片、１５・・・環状凹部、 １
５ａ・・・底面、１８・・・アモルファス合金箔、
２０・・・重錘、
２１・・・加熱炉、
２３・・・ヒーター
特
許
出
願
人
電
ヌＮ
興
業
株
式
東亜バルブ株式会社
（ほか４名）
第１
図
ｎ
第２図1 to 4 are for explaining one embodiment of the present invention, and FIG. 1 is a sectional view showing the structure of a globe valve, and FIG. 2 is a sectional view showing the structure of a globe valve.
The figure is a conceptual diagram showing the method for manufacturing the valve seat of the valve box.
4 is a characteristic diagram showing a heating pattern by a heating furnace, and FIG. 5 is a sectional view of a conventional globe valve. ■...Globe valve, 4...Valve box, 5...Valve stem, 5a...Tip, 11...Valve seat part,
13... Amorphous alloy layer, 14... Stellite piece as a valve seat, 15... Annular recess, 1
5a... Bottom surface, 18... Amorphous alloy foil, 20... Weight, 21... Heating furnace, 23... Heater patent applicant Dennu N Kogyo Co., Ltd. Toa Valve Co., Ltd. (and 4 others) Figure 1 n Figure 2
Claims (3)
材料又は耐熱材料から成る弁座をろう付けしたことを特
徴とする弁箱の弁座構造。(1) A valve seat structure for a valve box, characterized in that a valve seat made of a superhard material or a heat-resistant material is brazed to the valve seat portion of the valve box via an amorphous alloy layer.
から成る弁座をアモルファス合金箔を介して弁箱の弁座
部上に載置し、前記弁座を前記アモルファス合金箔及び
弁座部に向けて加圧した状態の下で前記アモルファス合
金箔を加熱溶融させて冷却することにより、前記弁座を
前記弁座部にろう付けするようにしたことを特徴とする
弁箱の弁座構造の製造方法。(2) A valve seat made of a carbide material or a heat-resistant material that has been preformed into a predetermined shape is placed on the valve seat portion of the valve box via an amorphous alloy foil, and the valve seat is placed between the amorphous alloy foil and the valve seat. The valve seat of the valve box is characterized in that the valve seat is brazed to the valve seat portion by heating and melting the amorphous alloy foil under pressure toward the valve body and cooling the amorphous alloy foil. Method of manufacturing the structure.
焼ならし処理を行なうようにしたことを特徴とする特許
請求の範囲第（２）項に記載の弁箱の弁座構造の製造方
法。(3) After the step of brazing the valve seat to the valve seat part,
A method of manufacturing a valve seat structure for a valve box according to claim 2, characterized in that a normalizing treatment is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12493390A JPH0419476A (en) | 1990-05-15 | 1990-05-15 | Valve seat structure for valve box and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12493390A JPH0419476A (en) | 1990-05-15 | 1990-05-15 | Valve seat structure for valve box and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0419476A true JPH0419476A (en) | 1992-01-23 |
Family
ID=14897763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12493390A Pending JPH0419476A (en) | 1990-05-15 | 1990-05-15 | Valve seat structure for valve box and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0419476A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136820A (en) * | 2001-07-24 | 2002-05-14 | Nippon Seisen Co Ltd | How to fix the filtration member |
| JP2004239330A (en) * | 2003-02-05 | 2004-08-26 | Toa Valve Co Ltd | Method for reforming manual valve to automatic valve |
| JP2012107593A (en) * | 2010-11-19 | 2012-06-07 | Hitachi Ltd | Steam turbine valve |
-
1990
- 1990-05-15 JP JP12493390A patent/JPH0419476A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002136820A (en) * | 2001-07-24 | 2002-05-14 | Nippon Seisen Co Ltd | How to fix the filtration member |
| JP2004239330A (en) * | 2003-02-05 | 2004-08-26 | Toa Valve Co Ltd | Method for reforming manual valve to automatic valve |
| JP2012107593A (en) * | 2010-11-19 | 2012-06-07 | Hitachi Ltd | Steam turbine valve |
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