JPS62255671A - Control valve - Google Patents
Control valveInfo
- Publication number
- JPS62255671A JPS62255671A JP9587186A JP9587186A JPS62255671A JP S62255671 A JPS62255671 A JP S62255671A JP 9587186 A JP9587186 A JP 9587186A JP 9587186 A JP9587186 A JP 9587186A JP S62255671 A JPS62255671 A JP S62255671A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve seat
- valve body
- coating material
- casing
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 28
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 claims abstract description 9
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims description 17
- 229910000531 Co alloy Inorganic materials 0.000 claims description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 18
- 230000003628 erosive effect Effects 0.000 abstract description 9
- -1 titanium carbide nitride Chemical class 0.000 abstract description 6
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 239000010409 thin film Substances 0.000 abstract description 4
- 229910010293 ceramic material Inorganic materials 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 210000000481 breast Anatomy 0.000 abstract 1
- 239000010941 cobalt Substances 0.000 abstract 1
- 229910017052 cobalt Inorganic materials 0.000 abstract 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 229910000734 martensite Inorganic materials 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000006210 lotion Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229910001347 Stellite Inorganic materials 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 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 3
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910001105 martensitic stainless steel Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004580 weight loss Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- BLOIXGFLXPCOGW-UHFFFAOYSA-N [Ti].[Sn] Chemical compound [Ti].[Sn] BLOIXGFLXPCOGW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ｙＪ節弁に係り、特に蒸気原動所の起動バイ
パス弁、給水ＩＩＬ量調節弁、スプレ波間調節弁ならび
に給水ポンプ再循環弁に用いられるような高温高圧流体
の圧力、ｖｔ、♀を調節するのに好適な２１８Ｉ節弁に
関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a yJ node valve, and in particular to a start-up bypass valve of a steam power plant, a feedwater IIL quantity control valve, a spray wave interval control valve, and a feedwater pump recirculation valve. This invention relates to a 218I section valve suitable for adjusting the pressure, VT, and ♀ of a high-temperature, high-pressure fluid.
［従来の技術］
一般に、調節弁は入口流路および出口流路ならびに弁室
を備えるケーシングと、ケーシングの弁室内に形成され
る弁座を、ケーシングに支持され、ケーシングの弁室内
を弁座に対して接離する方向に移動可能とされる弁体と
を有してなり、入口流路から流入した流体の圧力、流量
を弁体と弁座との間に形成される可変絞り部によって連
続的にｙＪ節し、出口流路から排出可能としている。[Prior Art] Generally, a control valve includes a casing including an inlet flow path, an outlet flow path, and a valve chamber, and a valve seat formed in the valve chamber of the casing. The valve body is movable toward and away from the valve body, and the pressure and flow rate of the fluid flowing in from the inlet flow path are continuously controlled by the variable restrictor formed between the valve body and the valve seat. yJ node and can be discharged from the outlet flow path.
ところで、上記調節弁においては、流体の流速が弁体と
弁座との間に形成される可変絞り部で急激に上昇するこ
とから、流体中の異物あるいは流体そのものが弁体およ
び弁座に激しく衝突し、容易にこれらを浸食したり、ま
た時として局部的なキャビテーションを生じ、そこにキ
ャビテーションエロージョンを生じ、弁体と弁座の締切
部の間に流体の漏れを生じたり、弁体と弁座との間に形
成される絞り部面積の変化によって流量の調節特性を阻
害するおそれがある。By the way, in the above-mentioned control valve, since the flow velocity of the fluid increases rapidly at the variable restrictor formed between the valve body and the valve seat, foreign objects in the fluid or the fluid itself can violently attack the valve body and the valve seat. They collide with each other and easily erode them, and sometimes cause local cavitation, which causes cavitation erosion, causing fluid leakage between the valve body and valve seat shut-off, or between the valve body and valve seat. There is a risk that the flow rate adjustment characteristics may be impaired due to a change in the area of the throttle portion formed between the seat and the seat.
また、高温水を扱うｒＡｍ弁においては、水中に含まれ
る鉄イオン等の懸濁粒子の電荷と、弁体あるいは弁座の
全屈両面の静電力との相互作用等により、特に絞り部近
傍で鉄イオン等の懸濁粒子が金属表面に引き付けられ、
スケールとして弁体あるいは弁座の表面に付着、堆積す
る現象を生ずる。このスケールの付着により、弁体と弁
座の締切部の間に流体の漏れを生じたり、弁体と弁座と
の間に形成される絞り部面枯が減少し１時として排出流
量の大幅な不足を来たし、流量の調節が不可能となる。In addition, in rAm valves that handle high-temperature water, the electric charge of suspended particles such as iron ions contained in the water interacts with the electrostatic force on both sides of the valve body or valve seat, especially near the throttle part. Suspended particles such as iron ions are attracted to the metal surface,
This causes scale to adhere and accumulate on the surface of the valve body or valve seat. The adhesion of this scale may cause fluid leakage between the valve body and the valve seat shut-off, or reduce the surface dryness of the throttle area that forms between the valve body and the valve seat, resulting in a significant increase in the discharge flow rate. This causes a shortage and makes it impossible to adjust the flow rate.
そこで従来、絞り部近傍の浸食から弁体および弁座の接
液部表面を保護すべく、それらの表面に耐浸食性能の高
いステライト等のコバルト系合金を盛会溶接等により一
体形成させたり、弁体および弁座そのものを５ｔｌＳ４
４０Ｃ等のヤルテンサイト系熱処理硬化ステンレスｗ４
等で製作した調節弁が使用され、侵食賃の軽減を図って
いる。Conventionally, in order to protect the liquid-contact surfaces of the valve body and valve seat from erosion near the throttle part, cobalt alloys such as stellite, which have high corrosion resistance, are integrally formed on these surfaces by welding. body and valve seat itself 5tlS4
Jartensitic heat treated hardened stainless steel w4 such as 40C
A control valve manufactured by a manufacturer, etc., is used to reduce erosion costs.
［発明が解決しようとする問題点コ
しかしながら、近年において、上記原動所の設計圧力、
温度の上昇あるいはプラントの高頻度の起動停止Ｆ連用
化に伴い各調節弁の使用条件が厳しくなり、上記従来の
７Ａｆｔｆ弁では浸食に対する対応が困難となっている
。[Problems to be solved by the invention] However, in recent years, the design pressures of the above-mentioned power stations,
As the temperature rises or plants start and stop frequently, the operating conditions for each control valve become stricter, making it difficult to deal with erosion with the conventional 7Aftf valve.
また、高圧高温水を調節する７Ａ箇弁の弁体あるいは弁
座におけるスケールの付着、堆積の問題については、簡
便で有効な防止方法が未だ提案されていない。Furthermore, no simple and effective method for preventing scale adhesion and accumulation on the valve body or valve seat of the 7A valve that regulates high-pressure, high-temperature water has yet to be proposed.
本発明は、弁体と弁座の耐浸食性能を向上するとともに
、弁体と弁座に対するスケールの付着を防止し、長期に
亘って制御性の良好な７Ａ箇弁を提供することを目的と
する。The purpose of the present invention is to improve the corrosion resistance of the valve body and valve seat, prevent scale from adhering to the valve body and valve seat, and provide a 7A valve with good controllability over a long period of time. do.
［問題点を解決するための手段〕
本発明は、入口流路および出口流路ならびに弁室を備え
るケーシングと、ケーシングの弁室内に形成される弁座
と、ケーシングに支持され、ケーシングの弁室内を弁座
に対して接離する方向に移動可能とされる弁体とを有し
てなる調節弁において、弁座および弁体の表面に炭化チ
タン（ＴｉＣ）、炭窒化チタン（ＴｉＣＮ）、窒化チタ
ン（Ｔ Ｉ Ｎ）からなる複合多重コーティング材料を
被着するようにしたものである。[Means for Solving the Problems] The present invention provides a casing that includes an inlet flow path, an outlet flow path, and a valve chamber, a valve seat that is supported by the casing, and that is formed within the valve chamber of the casing. In this control valve, the valve body is movable toward and away from the valve seat, and the surfaces of the valve seat and the valve body are coated with titanium carbide (TiC), titanium carbonitride (TiCN), and nitride. A composite multi-coating material made of titanium (TIN) is applied.
［作用］
本発明によれば、弁座および弁体の表面が耐二ローショ
ン性の極めて高いセラミクス材料である複合多重コーテ
ィング材料によって形成されることになる。したがって
、弁体と弁座の耐浸食性能を格段に向上するとともに、
弁体と弁座に対するスケールの付着を防止し、長期に亘
ってきわめて制御性の良好なｙＪ節介を得ることが可能
となる。[Function] According to the present invention, the surfaces of the valve seat and the valve body are formed of a composite multi-coated material which is a ceramic material with extremely high lotion resistance. Therefore, the corrosion resistance of the valve body and valve seat is greatly improved, and
It is possible to prevent scale from adhering to the valve body and valve seat, and to obtain yJ articulation with extremely good controllability over a long period of time.
［実施例］
第１図は本発明の一実施例に係る［ｊ弁１０を示す断面
図である。調節弁１０は、入口流路１１および出口流路
１２ならびに弁室１３を備えるケーシング１４と、ケー
シング１４の内部に配設される弁座１５と、ケーシング
１４に支持され。[Embodiment] FIG. 1 is a sectional view showing a valve 10 according to an embodiment of the present invention. The control valve 10 is supported by a casing 14 including an inlet flow path 11, an outlet flow path 12, and a valve chamber 13, a valve seat 15 disposed inside the casing 14, and the casing 14.
弁座１５に対して接離する方向に移動可能とされる弁体
（弁体）１６とを有している。弁座１５はケーシング１
４に螺合状態で固定され、弁体１６の中間部を案内する
案内部１７を備えるとともに、入口波路１１と出口流路
１２とを連絡する締切部１８、懐部１９．排出孔部２０
を備えている。また、弁体１６は弁座１５の締切部１８
に密着可能とされる締切部２１と、弁座１５の締切部１
８との間に絞り部を形成し、且つその絞り部面積を弁開
度の変化とともに可変とする所定輪郭形状のプラグ部２
２を備えている。The valve body (valve body) 16 is movable toward and away from the valve seat 15. Valve seat 15 is casing 1
4, and includes a guide portion 17 that guides the intermediate portion of the valve body 16, and a closing portion 18 and a pocket portion 19 that connect the inlet wave path 11 and the outlet flow path 12. Discharge hole part 20
It is equipped with Further, the valve body 16 is connected to the closing portion 18 of the valve seat 15.
The closing portion 21 that can be brought into close contact with the valve seat 15 and the closing portion 1 of the valve seat 15
A plug portion 2 having a predetermined contour shape that forms a constriction portion between the plug portion 2 and the valve portion 8, and the area of the constriction portion is variable as the valve opening degree changes.
2.
なお、弁体１６のケーシング１４から突出する部分には
、弁開閉用７クチユエータが連結可能とされるねじ部２
３が備えられている。また、弁体１６の中間部分とケー
シング１４との間にはバッキング２４が配設されている
。また、ケーシング１４の下部には、ケーシング１４に
螺合されるブリーチねじ２５に背面支持されるパツキン
２６を介してブリーチブロック２７を配設されている。The portion of the valve body 16 that protrudes from the casing 14 has a threaded portion 2 to which a valve opening/closing valve 7 can be connected.
3 are provided. Further, a backing 24 is disposed between the intermediate portion of the valve body 16 and the casing 14. Further, a breech block 27 is disposed at the lower part of the casing 14 via a packing 26 supported on the back side by a breech screw 25 screwed into the casing 14 .
ブリーチブロック２７は、プラグ２８によって閉塞され
るドレン孔部２９を備えている。The bleach block 27 includes a drain hole 29 that is closed by a plug 28 .
しかして、弁座１５の締切部１８、懐部１９、排出孔部
２０を主とする流体接液部、弁体１６の締切部２１、プ
ラグ部２２を主とする流体接液部の夫々には、ステンレ
ス鋼からなる母材にステライト（ヘインズ社の商標）等
のコバルト系合金を盛会溶接して仕上げた下地、もしく
はＳ Ｕ Ｓ ４４００等のマルテンサイト系ステンレ
ス鋼を所定の硬度に熱処理して仕上げた下地の表面に、
化学蒸着法により炭化チタン（Ｔｉｃ）、炭窒化チタン
（ＴｉＣＮ）、窒化チタン（ＴｉＮ）、の３つのセラミ
クス材料を順次重ねた複合多重コーティング材料の薄膜
が１例えばｔＪＳＺ図に示すように強固に密着状態で形
成されている。Therefore, the fluid contact parts mainly include the shutoff part 18, pocket part 19, and discharge hole part 20 of the valve seat 15, and the fluid contact parts mainly include the shutoff part 21 and the plug part 22 of the valve body 16. The base material is made by welding a cobalt alloy such as Stellite (a trademark of Haynes Corporation) to a base material made of stainless steel, or by heat treating martensitic stainless steel such as SUS 4400 to a specified hardness. On the surface of the finished base,
A thin film of a composite multi-coating material in which three ceramic materials, titanium carbide (Tic), titanium carbonitride (TiCN), and titanium nitride (TiN) are sequentially layered by chemical vapor deposition, is firmly adhered as shown in the tJSZ diagram. formed in the state.
上記複合多重コーティング材料の化学蒸着法は、約７０
０〜！０５０℃の範囲に加熱密閉したレトルト内に被処
理品をセットし、ガス状のＴ ｉ Ｃｌ亭とＬ！ 、
ＣＨ４、Ｎ２ を供給し、順次、被処理品の表面に上記
複合多重コーティング材料を化学的に形成させるもので
ある。基本的な化学反応式は以下のとおりである。The chemical vapor deposition method of the above composite multiple coating material is about 70%
0~! The product to be processed is placed in a retort sealed and heated to a temperature of 050°C, and the gaseous T i Cl and L! ,
CH4 and N2 are supplied to chemically form the above-mentioned composite multi-layered coating material on the surface of the object to be treated. The basic chemical reaction formula is as follows.
Ｔ ｉ Ｃｌ、、＋ ＣＨ４→ＴｉＣ＋４ＨＣ交２Ｔｉ
Ｃ又４＋ Ｎ２＋ ３ Ｎ２＋ ＣＨ÷→２ＴｉＣＮ＋
８ＨＣ文 ＋１Ｉ２
２ＴＩＣ与＋Ｎ２＋ ４ Ｈ２→２ＴｉＮ＋８ＨＣ文こ
の化学蒸着法によるコーティング方法は、処理温度が高
いため、コーティング材料と被処理品の表面の間でＣ等
の原子の拡散が活発に生じ、強固な密着性が得られる。T i Cl,, + CH4→TiC+4HC cross 2Ti
C or 4+ N2+ 3 N2+ CH÷→2TiCN+
8HC sentence +1I2 2TIC +N2+ 4 H2→2TiN+8HC sentence This coating method using chemical vapor deposition has a high processing temperature, so atoms such as C actively diffuse between the coating material and the surface of the object to be treated, resulting in a strong Adhesion is obtained.
また、複雑な形状の被処理品にも均一な被膜が得られる
。上記複合多重コーティング材料を構成する各材料の物
性値は表１のとおりである。Moreover, a uniform coating can be obtained even on a workpiece having a complicated shape. Table 1 shows the physical properties of each material constituting the composite multi-layered coating material.
なお、前記ステライトとしては、例えば表２に示すよう
なステライト間、６、ステライト間。The stellites include, for example, stellites as shown in Table 2, 6, and stellites.
１２が用いられる。12 is used.
第３図は各種材料によってコーティングされた弁座およ
び弁体の表面硬度を示す線図である。この第３図によれ
ば、Ｓ Ｕ Ｓ ３１６の母材に盛会されたステライト
間、６の表面にコーティングされた前記第２図の複合多
重コーティング材料の表面硬度は、他の処理方法による
場合に比してきわめて硬く、実にＨｍ Ｖ ３５００
（マイクロビッカース硬度）以上の超高硬度であること
が認められる。FIG. 3 is a diagram showing the surface hardness of valve seats and valve bodies coated with various materials. According to this FIG. 3, the surface hardness of the composite multi-coated material shown in FIG. It is extremely hard compared to Hm V 3500.
(Micro Vickers hardness) or higher hardness is recognized.
第４図は高圧水による二ローション加速試験に基づく減
重量を示す線図である。この第４図によれば、５ＵＳ３
１Ｂの母材に盛会されたステライト間、６の表面に前記
第２図の複合多重コーティング材料をコーティングして
なる試験片の減重量は、０〜７０時間までＧａｇであり
、格段に高い耐浸食性使を有することが認められる。FIG. 4 is a diagram showing weight loss based on two lotion accelerated tests using high-pressure water. According to this figure 4, 5US3
The weight loss of the test piece formed by coating the surface of 6 with the composite multi-coating material shown in FIG. It is permitted to have a sex worker.
すなわち、上記第３図および第４図に認められるように
、弁座１５、弁体１６の各流体接液部に前記複合多重コ
ーティング材料の薄膜を形成してなる調節弁１０によれ
ば、絞り部における高速流体の衝突あるいは時として生
ずるキャビテーションからそれら弁座１５、弁体１６を
強力に保護し、浸食の発生を略完全に防止可能となるこ
とは明らかである。なお、第４図の高圧水によるエロー
ジョン加速試験は、試験片に短時間で故意に二ローショ
ン損傷を与えるため、鋭利なスリット部から超高圧水流
束を試験片の局部に激しく衝突させて損傷を加速させる
ようにしたテスト装置による比較試験であり損傷時間お
よび損傷量の絶対値は上記実施例に係るｙＪｆ！ｇ弁ｌ
Ｏにそのままあてはまるもにでないことは勿論である。That is, as seen in FIGS. 3 and 4 above, according to the control valve 10 in which a thin film of the composite multilayer coating material is formed on each of the fluid contact parts of the valve seat 15 and the valve body 16, the throttle It is clear that the valve seat 15 and the valve body 16 can be strongly protected from collisions of high-speed fluids or cavitation that sometimes occurs, and the occurrence of erosion can be almost completely prevented. In addition, in the accelerated erosion test using high-pressure water shown in Figure 4, in order to intentionally damage the specimen in a short period of time, a flux of ultra-high-pressure water is violently collided with the local part of the specimen from a sharp slit to cause damage. This is a comparative test using a test device that accelerates, and the absolute values of damage time and damage amount are yJf! according to the above example. g valve l
Of course, this does not directly apply to O.
次に、上記実施例の作用について説明する。Next, the operation of the above embodiment will be explained.
弁開閉アクチュエータの作動により、弁体１６が軸方向
に移動され、弁体１６のプラグ部２２が弁座１５の締切
部１８との間に所定間隙の絞り部を形成すると、入口流
路１１から弁室１３に流入する流体がその絞り部を通過
する際に、圧力あるいは流量を３１箇され、弁座１５の
懐部１９から排出孔部２０を経て出口流路１２へ排出さ
れる。When the valve body 16 is moved in the axial direction by the operation of the valve opening/closing actuator and the plug portion 22 of the valve body 16 forms a constriction portion with a predetermined gap between the plug portion 22 and the shutoff portion 18 of the valve seat 15, the flow from the inlet flow path 11 is caused. When the fluid flowing into the valve chamber 13 passes through the constriction part, the pressure or flow rate is increased and the fluid is discharged from the pocket part 19 of the valve seat 15 through the discharge hole part 20 to the outlet passage 12 .
ここで、上記絞り部によって急激に加速される高速流体
は、弁体１６のプラグ部２２と締ｖＪｆＩＩ２１に激し
く衝突し、さらに弁座１５の締切部１８、懐部１９にも
衝撃を与えるが、それらの波体接液部の表面は前述のよ
うに耐侵食性能の非常に高いステライト等のコバルト合
金、もしくは５ｔＪＳ４４０Ｃ等のマルテンサイト系ス
テンレス鋼の下地に超高硬度を有する前記複合多重コー
ティング材料の薄膜によって被覆されていることから、
容易に浸食されることがない。Here, the high-speed fluid that is rapidly accelerated by the throttle section violently collides with the plug section 22 of the valve body 16 and the closure section 21, and also gives an impact to the closure section 18 and pocket section 19 of the valve seat 15; As mentioned above, the surfaces of these corrugated bodies in contact with the liquid are made of a cobalt alloy such as Stellite, which has extremely high corrosion resistance, or a composite multi-coated material having ultra-high hardness on a base of martensitic stainless steel such as 5t JS440C. Because it is covered with a thin film,
Not easily eroded.
また、上記３１ｍ弁１０に供給される流体が高圧高温水
であり、鉄イオン等の懸濁粒子を含んでいる場合でも、
絞り部を形成する弁体１６のプラグ部２２．締ｖＪｆＸ
ｌ１２１、アルイハ弁座１５のｍＨｍ１８、懐部１９．
排出孔部２０の表面は、非凝着性が高く、不活性な無機
材料である前記複合多重コーティング材料で覆われてい
ることから、金属表面に生ずる静電力を抑えるとともに
、仮に弁体１６のプラグ部２２および締切部２１．もし
くは弁座１５の締切部１８等に鉄イオン等の懸濁粒子が
引付けられても前記複合多重コーティング材料の非凝着
性のため、容易にそれらに付着せず、流体中に含まれた
まま出口流路１２から排出されることとなり、スケール
の付着による流量の大幅な不足発生を防止することが可
能である。また、弁の全閉時においても、弁体１６の締
切部２１、あるいは弁座１５の締切部１８にスケールの
付着が生じに＜〈シたがって確実な締切性能を得ること
が可イハとなり、スケール付着物の１″ａみ込みによる
締切ｉ１ｇ、２１における二ローション損傷の発生を防
止することも可能となる。Furthermore, even if the fluid supplied to the 31m valve 10 is high-pressure, high-temperature water and contains suspended particles such as iron ions,
A plug portion 22 of the valve body 16 forming a throttle portion. Shut vJfX
l121, Aluha valve seat 15 mHm18, pocket 19.
The surface of the discharge hole section 20 is covered with the composite multilayer coating material, which is an inert inorganic material with high non-adhesive properties, so that it suppresses the electrostatic force generated on the metal surface and temporarily prevents the valve body 16 Plug portion 22 and closing portion 21. Alternatively, even if suspended particles such as iron ions are attracted to the shut-off portion 18 of the valve seat 15, due to the non-adhesive property of the composite multi-layered coating material, they do not easily adhere to them and are contained in the fluid. Since the water is discharged from the outlet channel 12 as it is, it is possible to prevent a significant shortage in the flow rate due to scale adhesion. Further, even when the valve is fully closed, scale does not adhere to the closing portion 21 of the valve body 16 or the closing portion 18 of the valve seat 15. Therefore, it is possible to obtain reliable closing performance. It is also possible to prevent damage to the two lotions at the closures i1g and 21 due to scale deposits penetrating 1''a.
すなわち、上記実施例によれば、流量の：Ａ箇時に、ブ
「座１５と弁体１６との間に形成される絞り部の存在に
よって生ずるエロージョンの発生とスケールの付着、堆
積現象を軽減することが可能となる。したがって、二ロ
ーションの発生によって弁座１５や弁体１６を頻繁に交
換したり、スケールの付着により流量の大幅な不足を生
じｍｍ不能に至ることがない。That is, according to the above embodiment, the occurrence of erosion and the adhesion and deposition of scale caused by the presence of the constriction portion formed between the valve seat 15 and the valve body 16 at point A of the flow rate are reduced. Therefore, there is no need to frequently replace the valve seat 15 or the valve body 16 due to the generation of two lotions, or there is no need to cause a significant shortage of flow rate due to scale adhesion, which may lead to failure.
［発明の効果］
以上のように、本発明は、入口を路および出口流路なら
びに弁室を備えるケーシングと、ケーシングの弁室内に
形成される弁座と、ケージ：／グに支持され、ケーシン
グの弁室内を弁座に対して接離する方向に移動可使とさ
れる弁体とを有してなるｗＡ節弁において、弁座および
弁体の表面に炭化チタン（Ｔｉｃ）、炭窒化チタン（Ｔ
ｉＣＮ）。[Effects of the Invention] As described above, the present invention provides a casing having an inlet passage, an outlet passage, and a valve chamber, a valve seat formed in the valve chamber of the casing, and a casing supported by a cage. In this wA-section valve, the valve body is movable toward and away from the valve seat within the valve chamber, and the surfaces of the valve seat and the valve body are coated with titanium carbide (Tic) and titanium carbonitride. (T
iCN).
窒化チタン（ＴｉＮ）からなる複合多重コーティング材
料を被着するようにしたものである。したがって、弁体
と弁座の耐浸食性能を格段に向上するとともに、弁体と
弁座に対するスケールの付着を確実に防止し、長期に亘
ってきわめて制御性の良好な調節弁を得ることが可能と
なる。A composite multi-coating material consisting of titanium nitride (TiN) is applied. Therefore, it is possible to significantly improve the corrosion resistance of the valve body and valve seat, to reliably prevent scale from adhering to the valve body and valve seat, and to obtain a control valve with extremely good controllability over a long period of time. becomes.
第１図は本発明の一実施例にかかる２ＩＩＷｉ弁を示す
断面図、第２図は本発明における複合多重コーティング
材料の被着状態を示す断面図、第３図は複合多重コーテ
ィング材料の表面硬度を示す線図、第４図は高圧水によ
るエロージョン加速試験の結果を示す線図である。
ｌＯ・・・調節弁、１１・・・入口流路、１２・・・出
口流路、１３・・・弁室、１４・・・ケーシング、１５
・・・弁座、１６・・・弁体。
代理人 弁理士 塩 川 修 治
菊 ］ 回
第 ２ 図Fig. 1 is a sectional view showing a 2IIWi valve according to an embodiment of the present invention, Fig. 2 is a sectional view showing the state of adhesion of the composite multi-coating material in the present invention, and Fig. 3 is the surface hardness of the composite multi-coating material. FIG. 4 is a diagram showing the results of an accelerated erosion test using high-pressure water. lO... Control valve, 11... Inlet channel, 12... Outlet channel, 13... Valve chamber, 14... Casing, 15
... Valve seat, 16... Valve body. Agent Patent Attorney Osamu Shiokawa Harukiku] Figure 2
Claims (2)
ーシングと、ケーシングの弁室内に形成される弁座と、
ケーシングに支持され、ケーシングの弁室内を弁座に対
して接離する方向に移動可能とされる弁体とを有してな
る調節弁において、弁座および弁体の表面に炭化チタン
（ＴｉＣ）、炭窒化チタン（ＴｉＣＮ）、窒化チタン（
ＴｉＮ）からなる複合多重コーティング材料を被着する
ことを特徴とする調節弁。(1) A casing including an inlet flow path, an outlet flow path, and a valve chamber, and a valve seat formed in the valve chamber of the casing;
In a control valve having a valve body supported by a casing and movable in a direction toward and away from a valve seat within a valve chamber of the casing, the surfaces of the valve seat and the valve body are made of titanium carbide (TiC). , titanium carbonitride (TiCN), titanium nitride (
A control valve characterized in that it is coated with a composite multi-coating material made of (TiN).
体を形成する母材の表面に硬化形成されてなるコバルト
合金系硬化材の表面に被着される特許請求の範囲第１項
に記載の調節弁。(2) The composite multilayer coating material is applied to the surface of a cobalt alloy-based hardened material formed by hardening on the surface of a base material forming the valve seat and the valve body. Control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9587186A JPS62255671A (en) | 1986-04-26 | 1986-04-26 | Control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9587186A JPS62255671A (en) | 1986-04-26 | 1986-04-26 | Control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62255671A true JPS62255671A (en) | 1987-11-07 |
| JPH0379591B2 JPH0379591B2 (en) | 1991-12-19 |
Family
ID=14149413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9587186A Granted JPS62255671A (en) | 1986-04-26 | 1986-04-26 | Control valve |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62255671A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552186A (en) * | 1991-08-22 | 1993-03-02 | Kobe Steel Ltd | Gear pump for molten resin |
| JPH07103351A (en) * | 1993-09-30 | 1995-04-18 | Okano Valve Seizo Kk | Valve seat of fluid valve including sea water and chloride |
| JP2004019918A (en) * | 2002-06-20 | 2004-01-22 | Toshiba Corp | Valve arrangement and method of manufacturing the valve arrangement |
| JP2012145130A (en) * | 2011-01-07 | 2012-08-02 | Ihara Science Corp | Piston valve |
| JP2014238143A (en) * | 2013-06-07 | 2014-12-18 | 株式会社東芝 | Valve device and valve device manufacturing method |
| CN106224593A (en) * | 2016-08-25 | 2016-12-14 | 宁波长壁流体动力科技有限公司 | A kind of reversal valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0828749A (en) * | 1994-07-22 | 1996-02-02 | Kubota Corp | Lining structure for fluid equipment |
-
1986
- 1986-04-26 JP JP9587186A patent/JPS62255671A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0552186A (en) * | 1991-08-22 | 1993-03-02 | Kobe Steel Ltd | Gear pump for molten resin |
| JPH07103351A (en) * | 1993-09-30 | 1995-04-18 | Okano Valve Seizo Kk | Valve seat of fluid valve including sea water and chloride |
| JP2004019918A (en) * | 2002-06-20 | 2004-01-22 | Toshiba Corp | Valve arrangement and method of manufacturing the valve arrangement |
| JP2012145130A (en) * | 2011-01-07 | 2012-08-02 | Ihara Science Corp | Piston valve |
| JP2014238143A (en) * | 2013-06-07 | 2014-12-18 | 株式会社東芝 | Valve device and valve device manufacturing method |
| CN106224593A (en) * | 2016-08-25 | 2016-12-14 | 宁波长壁流体动力科技有限公司 | A kind of reversal valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0379591B2 (en) | 1991-12-19 |
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