JPH0379591B2 - - Google Patents

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Publication number
JPH0379591B2
JPH0379591B2 JP9587186A JP9587186A JPH0379591B2 JP H0379591 B2 JPH0379591 B2 JP H0379591B2 JP 9587186 A JP9587186 A JP 9587186A JP 9587186 A JP9587186 A JP 9587186A JP H0379591 B2 JPH0379591 B2 JP H0379591B2
Authority
JP
Japan
Prior art keywords
valve
valve seat
valve body
casing
control valve
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.)
Expired
Application number
JP9587186A
Other languages
Japanese (ja)
Other versions
JPS62255671A (en
Inventor
Takeshi Saito
Takeshi Suguro
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BAILEY JAPAN
Original Assignee
BAILEY JAPAN
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BAILEY JAPAN filed Critical BAILEY JAPAN
Priority to JP9587186A priority Critical patent/JPS62255671A/en
Publication of JPS62255671A publication Critical patent/JPS62255671A/en
Publication of JPH0379591B2 publication Critical patent/JPH0379591B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、調節弁に係り、特に蒸気原動所の起
動バイパス弁、給水流量調整弁、スプレ流量調節
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、流量を調節するのに好適
な調節弁に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control valve, particularly used in a startup bypass valve, a feedwater flow rate control valve, a spray flow rate control valve, and a feedwater pump recirculation valve in a steam power plant. The present invention relates to a control valve suitable for adjusting the pressure and flow rate of such 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内の圧力、流量を弁体と弁
座との間に形成される可変絞り部によつて連続的
に調節し、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 flow flowing from the inlet flow path is applied to the variable restrictor formed between the valve body and the valve seat. Therefore, it can be continuously adjusted and discharged from the outlet channel.

ところで、蒸気調節弁においては、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
キヤビテーシヨンを生じ、そこにキヤビテーシヨ
ンエロージヨンを生じ、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つて流量の調節特
性を阻害するおそれがある。
By the way, in a steam control valve, the flow velocity of the fluid increases rapidly at the variable restrictor formed between the valve body and the valve seat, so foreign objects in the fluid or the fluid itself can violently attack the valve body and the valve seat. They collide and easily erode them, and sometimes cause local cavitation, causing cavitation erosion there, causing fluid leakage between the valve body and the valve seat closure, Changes in the area of the constriction formed between the valve body and the valve seat may impede the flow rate adjustment characteristics.

また、高温水を扱う調節弁においては、水中に
含まれる鉄イオン等の懸濁粒子の電荷と、弁体あ
るいは弁座の金属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積が減少し、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 control valves that handle high-temperature water, the interaction between the electric charge of suspended particles such as iron ions contained in the water and the electrostatic force on both metal surfaces of the valve body or valve seat causes iron to be deposited, especially near the throttle part. Suspended particles such as ions are attracted to the metal surface, causing scale to adhere and accumulate on the surface of the valve body or valve seat. This scale buildup can cause fluid leakage between the valve body and the valve seat closure, reduce the area of the throttle area formed between the valve body and the valve seat, and sometimes cause a significant increase in the discharge flow rate. This results in a shortage and it becomes 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
を盛菌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SUS440C等のマルテンサイト
系熱処理硬化ステンレス鋼等で製作した調節弁が
使用され、浸食量の軽減を図つている。
Conventionally, in order to protect the liquid-contact surfaces of the valve body and valve seat from erosion near the throttle part, cobalt-based alloys such as stellite, which have high corrosion resistance, are integrally formed on these surfaces by welding. A control valve whose valve body and seat itself are made of martensitic heat-treated hardened stainless steel such as SUS440C is used to reduce the amount of corrosion.

[発明が解決しようとする問題点] しかしながら、近年において、蒸気原動所の設
計圧力、温度の上昇あるいはプラントの高頻度の
起動停止運用化に伴い各調節弁の使用条件が厳し
くなり、上記従来の調節弁では浸食に対する対応
が困難となつている。
[Problems to be Solved by the Invention] However, in recent years, the operating conditions for each control valve have become stricter due to increases in the design pressure and temperature of steam power plants and the frequent startup and shutdown of plants. It has become difficult for control valves to deal with erosion.

また、高圧高温水を調節する調節弁の弁体ある
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 a control 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、長期に亘つて制御性の良好な調節弁を提
供することを目的とする。
The present invention aims to provide a control valve that improves the corrosion resistance of the valve body and valve seat, prevents scale from adhering to the valve body and valve seat, and provides good controllability over a long period of time. .

[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イ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 includes a casing including an inlet flow path, an outlet flow path, and a valve chamber, a valve seat supported by the casing, and a valve seat formed in 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),
A composite multiple coating material consisting of titanium carbonitride (TiCN) and titanium nitride (TiN) is applied.

[作用] 本発明によれば、弁座および弁体の表面が耐エ
ロージヨン性の極めて高いセラミツクス材料であ
る複合多重コーテイング材料によつて形成される
ことになる。したがつて、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、長期に亘つてきわめ
て制御性の良好な調節弁を得ることが可能とな
る。
[Function] According to the present invention, the surfaces of the valve seat and the valve body are formed of a composite multiple coating material which is a ceramic material with extremely high erosion resistance. Therefore, it is possible to significantly improve the corrosion resistance of the valve body and valve seat, prevent scale from adhering to the valve body and valve seat, and obtain a control valve with extremely good controllability over a long period of time. becomes.

[実施例] 第1図は本発明の一実施例に係る調節弁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、弁
座15に対して接離する方向に移動可能とされる
弁体(弁棒)16とを有している。弁座15はケ
ーシング14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、
入口流路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18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22を備えている。
[Embodiment] FIG. 1 is a sectional view showing a control valve 10 according to an embodiment of the present invention. The control valve 10 has an inlet flow path 11
and a casing 14 including an outlet passage 12 and a valve chamber 13; a valve seat 15 disposed inside the casing 14; It has a valve body (valve stem) 16. The valve seat 15 is fixed to the casing 14 in a screwed state, and includes a guide portion 17 that guides the intermediate portion of the valve body 16.
It includes a closing portion 18 that connects the inlet flow path 11 and the outlet flow path 12, a pocket portion 19, and a discharge hole portion 20. Further, the valve body 16 forms a constricted portion between the shut-off portion 21 that can be brought into close contact with the shut-off portion 18 of the valve seat 15 and the shut-off portion 18 of the valve seat 15, and the area of the constricted portion is determined by the valve opening. The plug portion 22 has a predetermined contour shape that is variable as the shape changes.

なお、弁体16のケーシング14から突出する
部分には、弁開閉用アクチユエータが連結可能と
されるねじ部23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との間にはパツ
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ツク27を配設されている。
ブリーチブロツク27は、プラグ28によつて閉
塞されるドレン孔部29を備えている。
A portion of the valve body 16 that protrudes from the casing 14 is provided with a threaded portion 23 to which a valve opening/closing actuator can be connected. Further, a packing 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 by a breech screw 25 screwed into the casing 14.
Breach block 27 has a drain hole 29 which 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
盛金溶接して仕上げた下地、もしくはSUS440C
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多合重合コーテイング材料
の薄膜が、例えば第2図に示すように強固に密着
状態で形成されている。
Therefore, the closing portion 18, pocket portion 19 of the valve seat 15,
Each of the fluid contact parts mainly including the discharge hole 20, the shutoff part 21 of the valve body 16, and the plug part 22 is made of Stellite (a trademark of Haynes Co., Ltd.) on a base material made of stainless steel. ), etc., or SUS440C.
Three ceramic materials, titanium carbide (TiC), titanium carbonitride (TiCN), and titanium nitride (TiN), are applied by chemical vapor deposition to the surface of a base made of martensitic stainless steel, which has been heat-treated to a specified hardness. For example, as shown in FIG. 2, a thin film of a polypolymerized coating material is formed by sequentially overlapping layers in a tightly adhered state.

上記複合多重コーテイング材料の化学蒸着法
は、約700〜1050℃の範囲に加熱密閉したレトル
ト内に被処理品をセツトし、ガス状のTiCl4
H2、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イ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。
In the chemical vapor deposition method for the above-mentioned composite multiple coating materials, the workpiece is placed in a sealed retort heated to a temperature in the range of about 700 to 1050°C, and gaseous TiCl 4 and
H 2 , CH 4 , and N 2 are supplied to chemically form the above-mentioned composite multiple coating material on the surface of the object to be treated in sequence. The basic chemical reaction formula is as follows.

TiCl4+CH4→TiC+4HCl 2TiCl4+N2+3H2+CH4 →2TiCN+8HCl+H2 2TiCl4+N2+4H2→2TiN+8HCl この化学蒸着法によるコーテイング方法は、処
理温度が高いため、コーテイ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。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
ーテイ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。
TiCl 4 +CH 4 →TiC+4HCl 2TiCl 4 +N 2 +3H 2 +CH 4 →2TiCN+8HCl+H 2 2TiCl 4 +N 2 +4H 2 →2TiN+8HCl This chemical vapor deposition coating method requires high processing temperatures, so there is no In this case, active diffusion of atoms such as C occurs, and strong adhesion is obtained. 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 above composite multiple coating material.
It is as follows.

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No.6、ステライトNo.12が用
いられる。
As the stellite, for example, stellite No. 6 and stellite No. 12 as shown in Table 2 are used.

第3図は各種材料によつてコーテイングされた
弁座および弁体の表面強度を示す線図である。こ
の第3図によれば、SUS316の母材に盛金された
ステライトNo.6の表面にコーテイングされた前記
第2図の複合多重コーテイ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HmV3500(マイクロビツカース硬度)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 strength of the valve seat and valve body coated with various materials. According to this Fig. 3, the surface hardness of the composite multi-layered coating material shown in Fig. 2 coated on the surface of Stellite No. 6 deposited on the SUS316 base material is higher than that obtained by other treatment methods. It is extremely hard, and in fact, it is recognized to have an ultra-high hardness of HmV3500 (microvitkers hardness) or higher.

第4図は高圧水によるエロージヨン加速試験に
基づく減重量を示す線図である。この第4図によ
れば、SUS316の母材に盛金されたステライトNo.
6の表面に前記第2図の複合多重コーテイング材
料をコーテイングしてなる試験片の減重量は、0
〜70時間まで0mgであり、格段に高い耐浸食性能
を有することが認められる。
FIG. 4 is a diagram showing weight loss based on accelerated erosion test using high-pressure water. According to this Figure 4, Stellite No. 1 is deposited on the base material of SUS316.
The weight loss of the test piece obtained by coating the surface of No. 6 with the composite multiple coating material shown in FIG. 2 was 0.
0 mg for up to 70 hours, and it is recognized that it has extremely high corrosion resistance performance.

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イ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ヤビテーシヨ
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
ージヨン加速試験は、試験片に短時間で故意にエ
ロージヨン損傷を与えるため、鋭利なスリツト部
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調節弁10にそのままあては
まるものに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 multiple 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 the collision of high-speed fluid 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 cause erosion damage to the test piece in a short period of time, the ultra-high pressure water flux is violently collided with the local part of the test piece from a sharp slit to accelerate the damage. This was a comparative test using a testing device designed to allow the user to perform the same procedure, and it goes without saying that the absolute values of the damage time and amount of damage do not directly apply to the control valve 10 according to the above embodiment.

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.

弁開閉アクチユ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
いは流量を調節され、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。
Due to the operation of the valve opening/closing actuator, the valve body 16
is moved in the axial direction, and when the plug part 22 of the valve body 16 forms a constriction part with a predetermined gap between the plug part 22 of the valve body 16 and the shutoff part 18 of the valve seat 15, the fluid flowing into the valve chamber 13 from the inlet channel 11 passes through the constriction part. When passing through the chamber, the pressure or flow rate is adjusted and the fluid is discharged from the pocket 19 of the valve seat 15 to the outlet passage 12 via the discharge hole 20.

ここで、上記絞り部によつて急激に加速される
高速流体は、弁体16のプラグ部22と締切部2
1に激しく衝突し、さらに弁座15の締切部1
8、懐部19にも衝撃を与えるが、それらの流体
接液部の表面は前述のように耐浸食性能の非常に
高いステライト等のコバルト合金、もしくは
SUS440C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イン
グ材料の薄膜によつ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 constriction section moves between the plug section 22 of the valve body 16 and the shutoff section 2.
1 violently collides with the valve seat 15, and furthermore, the valve seat 15 is
8. Impact is also applied to the pocket 19, but the surface of those parts in contact with the fluid is made of cobalt alloy such as stellite, which has very high corrosion resistance as described above, or
Since the base of martensitic stainless steel such as SUS440C is coated with a thin film of the above-mentioned composite multi-layer coating material having ultra-high hardness,
Not easily eroded.

また、上記調節弁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、締切部21、あるいは弁座15の締切部
18、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
コーテイ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イング材料
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
生じにくくしたがつて確実な締切性能を得ること
が可能となり、スケール付着物の噛み込みによる
締切部18,21におけるエロージヨン損傷の発
生を防止することも可能となる。
Further, even if the fluid supplied to the control valve 10 is high-pressure, high-temperature water and contains suspended particles such as iron ions, the plug portion 22 of the valve body 16 forming the throttle portion, the shut-off portion 21, or The surfaces of the shutoff portion 18, pocket portion 19, and discharge hole portion 20 of the valve seat 15 are covered with the composite multi-coating material, which is an inert inorganic material with high non-adhesive properties, so that it does not adhere to the metal surface. In addition to suppressing the generated electrostatic force, even if suspended particles such as iron ions are attracted to the plug portion 22 and the shutoff portion 21 of the valve body 16 or the shutoff portion 18 of the valve seat 15, the non-resistance of the composite multiple coating material Due to its adhesive nature, it does not easily adhere to them and is discharged from the outlet channel 12 while remaining contained in the fluid, making it possible to prevent a significant shortage of flow rate due to scale adhesion. . In addition, even when the valve is fully closed, it is difficult for scale to adhere to the closing portion 21 of the valve body 16 or the closing portion 18 of the valve seat 15, making it possible to obtain reliable closing performance. It is also possible to prevent erosion damage in the closing portions 18, 21 due to jamming.

すなわち、上記実施例によれば、流量の調節時
に、弁座15と弁体16との間に形成される絞り
部の存在によつて生ずるエロージヨンの発生とス
ケールの付着、堆積現象を軽減することが可能と
なる。したがつて、エロージヨンの発生によつて
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調整不能
に至ることがない。
That is, according to the above embodiment, when adjusting the flow rate, it is possible to reduce the occurrence of erosion and the adhesion and accumulation of scale caused by the presence of the constriction portion formed between the valve seat 15 and the valve body 16. becomes possible. Therefore, there is no need to frequently replace the valve seat 15 or the valve body 16 due to the occurrence of erosion, or there is no possibility that the flow rate will be significantly insufficient due to scale adhesion, leading to the inability to adjust.

[発明の効果] 以上のように、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
る調節接において、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イング材
料を被着するようにしたものである。したがつ
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、長期に亘つ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。
[Effects of the Invention] As described above, the present invention includes 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 in the valve chamber of the casing. and a valve body that is movable toward and away from the valve seat, the surfaces of the valve seat and the valve body are coated with titanium carbide (TiC), titanium carbonitride (TiCN), and nitride. A composite multiple coating material made of titanium (TiN) is applied. Therefore, it is possible to significantly improve the erosion 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 possible.

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

第1図は本発明の一実施例にかかる調節弁を示
す断面図、第2図は本発明における複合多重コー
テイング材料の被着状態を示す断面図、第3図は
複合多重コーテイング材料の表面硬度を示す線
図、第4図は水によるエロージヨン加速試験の結
果を示す線図である。 10……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。
FIG. 1 is a cross-sectional view showing a control valve according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the state of application of the composite multiple coating material in the present invention, and FIG. 3 is a surface hardness of the composite multiple coating material. FIG. 4 is a diagram showing the results of an accelerated erosion test using water. 10... Control valve, 11... Inlet channel, 12...
Outlet flow path, 13... valve chamber, 14... casing,
15... Valve seat, 16... Valve body.

【表】【table】

【表】【table】

Claims (1)

【特許請求の範囲】 1 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(TiN)からなる
複合多重コーテイング材料を被着することを特徴
とする調節弁。 2 前記複合多重コーテイング材料が、弁座およ
び弁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。
[Claims] 1. A casing including an inlet flow path, an outlet flow path, and a valve chamber, a valve seat formed in the valve chamber of the casing, and a valve seat supported by the casing and in contact with the valve seat within the valve chamber of the casing. In a control valve having a valve body that is movable in the direction of separation, a composite material made of titanium carbide (TiC), titanium carbonitride (TiCN), and titanium nitride (TiN) is used on the surfaces of the valve seat and the valve body. A control valve characterized by being coated with multiple coating materials. 2. The control valve according to claim 1, wherein the composite multiple coating material is adhered to the surface of a cobalt alloy-based hardened material that is hardened and formed on the surface of a base material that forms the valve seat and the valve body. .
JP9587186A 1986-04-26 1986-04-26 Control valve Granted JPS62255671A (en)

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 JPS62255671A (en) 1987-11-07
JPH0379591B2 true 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 (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828749A (en) * 1994-07-22 1996-02-02 Kubota Corp Lining structure for fluid equipment

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2740700B2 (en) * 1991-08-22 1998-04-15 株式会社神戸製鋼所 Gear pump for molten resin
JP2637039B2 (en) * 1993-09-30 1997-08-06 岡野バルブ製造株式会社 Valve seats for fluids containing seawater and chloride
JP4220186B2 (en) * 2002-06-20 2009-02-04 株式会社東芝 Valve device and manufacturing method thereof
JP5829026B2 (en) * 2011-01-07 2015-12-09 イハラサイエンス株式会社 Piston valve
JP6157937B2 (en) * 2013-06-07 2017-07-05 株式会社東芝 Valve device and manufacturing method thereof
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0828749A (en) * 1994-07-22 1996-02-02 Kubota Corp Lining structure for fluid equipment

Also Published As

Publication number Publication date
JPS62255671A (en) 1987-11-07

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