KR20190075527A - Valve trim device and valve trim device manufacturing method - Google Patents

Valve trim device and valve trim device manufacturing method Download PDF

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KR20190075527A
KR20190075527A KR1020170177178A KR20170177178A KR20190075527A KR 20190075527 A KR20190075527 A KR 20190075527A KR 1020170177178 A KR1020170177178 A KR 1020170177178A KR 20170177178 A KR20170177178 A KR 20170177178A KR 20190075527 A KR20190075527 A KR 20190075527A
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layer
welding
metal
strength
impact
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KR1020170177178A
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Korean (ko)
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김충호
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김충호
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00Details relating to contact between valve members and seats
    • F16K25/005Particular materials for seats or closure elements
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3033Ni as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24Selection of soldering or welding materials proper
    • B23K35/30Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
    • B23K35/3046Co as the principal constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/001Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14Metallic material, boron or silicon
    • C23C14/16Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/42Valve seats

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Lift Valve (AREA)

Abstract

The present invention relates to a valve trim sealing unit reinforcement structure and a reinforcement method thereof and, more specifically, to a valve trim sealing unit reinforcement structure and a method for reinforcing a sealing unit by using the same, wherein the valve trim sealing unit reinforcement structure comprises: a passage through which a fluid flows; and a welding layer formed on a sealing surface formed on a plug or a seatring controlling flow of the fluid by opening or closing the passage. The welding layer comprises: a shock absorption layer (120) formed of metal having shock absorption performance; and a strength reinforcement layer (140) formed of metal having rigidity on the shock absorption layer (120). Accordingly, a sealing unit can be reinforced to extend durability of a valve.

Description

밸브 트림 밀봉부 보강구조 및 보강방법{Valve trim device and valve trim device manufacturing method}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve trim sealing device,

본 발명은 밸브에 관한 것으로, 특히 밸브 트림 밀봉부의 수명을 연장하고 내 마모성을 부여할 수 있게 되는 밸브 트림 밀봉부 보강구조 및 보강방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve, and more particularly, to a valve trim seal reinforcement structure and a reinforcement method that can extend the service life of a valve trim seal and impart abrasion resistance.

일반적으로 유체를 제어하기 위해 밸브가 사용된다. 이러한 밸브는 다양한 형상 및 구조의 것이 있을 수 있는 바, 유체가 흐르는 통로와 상기 통로를 개방하거나 폐쇄함으로써 유체의 흐름을 제어하는 플러그를 포함한 구조가 있다. In general, valves are used to control the fluid. Such a valve may be of various shapes and configurations, including a passage through which the fluid flows and a plug that controls the flow of the fluid by opening or closing the passage.

상기 플러그는 폐쇄하고자 하는 통로의 입구에 설치되어 왕복운동을 하면서 상기 통로의 입구에 접함으로써 통로를 폐쇄하고 상기 입구에서 일정 간격 떨어짐으로써 통로를 개방시키게 된다. 통상적으로 상기 통로는 단면 원형을 이루게 형성되고 플러그 또한 단면 원형을 이루게 되는데, 이러한 구성에서는 플러그 단부 가장자리가 모따기 처리되어 밀봉면이 형성됨으로써 상기 밀봉면이 통로 입구에 접할 수 있게 형성되는 구조를 이룬다. 물론 통로의 입구도 모따기 처리되어 밀봉면이 형성됨으로써 플러그에 형성되는 밀봉면과 대응될 수 있다. 여기서, 상기 통로에 시트링(seatring)이 형성되는 경우 플러그에 형성된 밀봉면은 시트링에 형성되는 밀봉면에 접하게 된다.The plug is installed at an inlet of a passage to be closed and contacts the inlet of the passage while reciprocating, thereby closing the passage and opening the passage by a certain distance from the inlet. Typically, the passageway is formed to have a circular section and the plug also has a circular cross-section. In this configuration, the plug end edge is chamfered to form a sealing surface so that the sealing surface is formed to be in contact with the passage entrance. Of course, the entrance of the passageway can also be chamfered to form a sealing surface so as to correspond to the sealing surface formed in the plug. Here, when the seat ring is formed in the passage, the sealing surface formed on the plug is brought into contact with the sealing surface formed on the seat ring.

한편, 상기와 같은 밀봉구조에서 밀봉면은 고온 고압의 유체에 의한 마모 침식 및 밸브의 개폐과정에서 발생하는 충격에 의한 손상이 발생하게 된다. 이와 같이 마모 침식 및 충격에 의한 손상이 발생하게 되면 소망하는 밀봉 성능을 달성할 수 없음은 자명한바, 상기 밀봉면의 강성과 내마모성을 향상시켜 소망하는 밀봉성능을 유지할 수 있도록 함과 아울러 수명을 연장하도록 하여야 할 필요가 있다.On the other hand, in the above-described sealing structure, the sealing surface is subject to abrasion erosion due to high-temperature and high-pressure fluid, and damage due to shocks generated during opening and closing of the valve. As described above, if the abrasion is caused by erosion and impact, a desired sealing performance can not be achieved. As a result, it is possible to improve the rigidity and abrasion resistance of the sealing surface to maintain desired sealing performance, It is necessary to do.

대한민국 특허등록 제10-1091584호(2011. 12. 13. 공고)Korean Patent Registration No. 10-1091584 (Announcement of Dec. 13, 2011)

본 발명은 밀봉면의 강성과 내마모성을 향상시킴으로써 우수한 밀봉성능을 구현함과 아울러 수명을 연장시킬 수 있게 형성되는 밸브 트림 밀봉부 구조를 것에 그 목적이 있다.An object of the present invention is to provide a valve trim sealing structure which is formed to improve rigidity and abrasion resistance of a sealing surface, thereby realizing excellent sealing performance and prolonging the service life.

본 발명에서는 밀봉면에 각기 물성이 다르면서도 강성과 충격흡수성 및 내마모성을 부여할 수 있는 금속을 복수 층으로 용접한 다음 가공하여 상기 밀봉면에 강성과 충격흡수 성능 및 내마모성을 부여함으로써 상기의 목적을 달성한다.In the present invention, the sealing surface is formed by welding a plurality of layers of metals capable of imparting rigidity, impact absorbability, and abrasion resistance to each other with different physical properties, and then processing the sealing surface to impart rigidity, shock absorbing performance, and abrasion resistance to the sealing surface, .

본 발명에 따르면 밀봉면이 효과적으로 보강되는바, 충격흡수 성능 및 내마모성을 두루 갖춘 밸브 트림 밀봉부 구조를 달성할 수 있게 되고, 따라서 밀봉부의 내구성이 향상되는바, 결과적으로 밸브의 수명을 연장할 수 있게 된다.According to the present invention, since the sealing surface is effectively reinforced, it is possible to achieve the structure of the valve trim seal having the shock absorbing performance and the wear resistance, and as a result, the durability of the sealing portion is improved, .

도 1은 본 발명이 적용되는 밸브의 구조를 개략적으로 보여주는 예시도,
도 2는 본 발명이 적용되는 밸브의 구조를 개략적으로 보여주는 단면도,
도 3은 본 발명에 의한 밀봉부를 발췌하여 보여주는 예시도,
도 4는 본 발명에 의한 밀봉부 형성단계를 보여주는 예시도.
Fig. 1 is an exemplary view schematically showing the structure of a valve to which the present invention is applied,
2 is a sectional view schematically showing the structure of a valve to which the present invention is applied,
3 is an illustration showing an excerpt of a sealing portion according to the present invention,
4 is an exemplary view showing a step of forming a sealing portion according to the present invention;

본 발명은 밀봉면의 강성과 내마모성을 향상시킴으로써 우수한 밀봉성능을 구현함과 아울러 수명을 연장시킬 수 있게 형성되는 밸브 트림 밀봉부 구조를 얻기 위해, In order to obtain a valve trim sealing structure which is formed to improve the rigidity and wear resistance of a sealing surface to achieve excellent sealing performance and to prolong its service life,

유체가 흐르는 통로와 상기 통로를 개방하거나 폐쇄함으로써 유체의 흐름을 제어하는 플러그 또는 시트링에 형성되는 밀봉면에 용접층이 형성되되,A welding layer is formed on a sealing surface formed on a plug or a seat ring for controlling the flow of fluid by opening and closing the passage and a passage through which the fluid flows,

상기 용접층은 충격흡수 성능을 가진 금속으로 형성되는 충격흡수층과 상기 충격흡수층 위에 강성을 가진 금속으로 형성되는 강도보강층을 포함하여 밀봉부가 보강되는 밸브 트림 밀봉부 보강구조 및 그러한 보강구조를 형성하는 방법을 제안한다.Wherein the welding layer comprises a shock absorbing layer formed of a metal having impact absorbing capability and a strength reinforcing layer formed of a metal having rigidity on the impact absorbing layer to reinforce the sealing portion and a method of forming such reinforcing structure .

이하 본 발명을 첨부된 도면 도 1 내지 도 4를 참고로 하여 상세하게 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

도 1은 본 발명이 적용되는 밸브의 구조를 개략적으로 보여주는 예시도, 도 2는 본 발명이 적용되는 밸브의 구조를 개략적으로 보여주는 단면도, 도 3은 본 발명에 의한 밀봉부를 발췌하여 보여주는 예시도, 도 4는 본 발명에 의한 밀봉부 형성단계를 보여주는 예시도이다.FIG. 2 is a cross-sectional view schematically showing the structure of a valve to which the present invention is applied. FIG. 3 is an excerpt of a seal according to the present invention. FIG. 4 is an exemplary view showing a step of forming a sealing portion according to the present invention.

밸브는 주지된 바와 같이 유체가 흐르는 통로와 상기 통로를 개방하거나 폐쇄함으로써 유체의 흐름을 제어하는 플러그(100)를 포함하여 형성될 수 있다. 상기 플러그(100)가 통로를 막아주거나 개방하여 주는 지점, 즉 상기 플러그(100)와 통로 입구가 맞닿는 지점에는 밀봉면이 형성되게 된다. 그 결과 밸브 트림은 상기 밀봉면에 형성되게 된다. 그리고 상기 통로 입구에는 시트링(200)이 형성되어 상기 밀봉면과 대응될 수 있는데, 시트링(200)에도 플러그(100)에 형성되는 밀봉면과 마찬가지로 밀봉면이 형성되어 대응될 수 있다. 이와 같이 플러그(100)에 형성되는 밀봉면과 시트링(200)에 형성되는 밀봉면에 의해 밸브 트림 밀봉부(A)가 구성되게 되는 것이다. The valve may include a passage through which the fluid flows and a plug 100 that controls the flow of the fluid by opening or closing the passage as is well known. A sealing surface is formed at a point where the plug 100 closes or opens the passageway, that is, a point where the plug 100 contacts the passageway inlet. As a result, the valve trim is formed on the sealing surface. A seat ring 200 may be formed at the passageway entrance to correspond to the sealing surface, and the sealing ring 200 may be formed to have a sealing surface similar to a sealing surface formed in the plug 100. The valve trim seal A is formed by the sealing surface formed on the plug 100 and the sealing surface formed on the seat ring 200 as described above.

본 발명은 상기 밀봉면에 용접층이 형성됨으로써 밸브 트림 밀봉부(A)를 보강하게 된다. 상기 용접층은 플러그(100)에 형성된 밀봉면과 시트링(200)에 형성된 밀봉면에 모두 형성될 수 있고, 필요에 따라 어느 한쪽에만 형성되는 것도 가능하다. 시트링(200)이 구비되지 않은 경우 상기 통로 입구에 형성되는 밀봉면에 용접층이 형성되는 것도 가능함은 물론이다.In the present invention, a welding layer is formed on the sealing surface to reinforce the valve-trim sealing portion (A). The welding layer may be formed on both the sealing surface formed on the plug 100 and the sealing surface formed on the seat ring 200, and may be formed on only one of the sealing surfaces. It is of course possible to form a welding layer on the sealing surface formed at the passage entrance when the seat ring 200 is not provided.

상기 용접층은 충격흡수층(120)과 상기 충격흡수층(120) 위에 형성되는 강도보강층(140)을 포함한다. 그리고 상기 강도보강층(140) 위에 금속 물성이 증착되어 형성되는 층착코팅층(160)을 더 포함할 수 있다. The welding layer includes an impact absorbing layer 120 and a strength reinforcing layer 140 formed on the impact absorbing layer 120. And a layered coating layer 160 formed by depositing a metal layer on the strength-enhancing layer 140.

상기 충격흡수층(120)과 강도보강층(140)은 서로 다른 물성을 가진 금속으로 형성된다. 충격흡수층(120)은 일정한 정도 충격흡수 성능을 가진 금속으로 형성되고, 강도보강층(140)은 충격흡수층(120)에 비해 강성과 내마모성이 뛰어난 금속으로 형성되는 것이다. 예를 들면 상기 충격흡수층(120)은 니켈합금강(인코넬, inconel)으로 형성되고, 상기 강도보강층(140)은 코발트합금(스텔라이트, stellite)으로 형성되는 것이다. 그 결과 밀봉면의 강도가 보강됨과 아울러 일정한 정도의 충격을 흡수할 수 있고 밀봉면을 보강할 수 있게 된다.The impact absorbing layer 120 and the strength reinforcing layer 140 are formed of metals having different physical properties. The impact-absorbing layer 120 is formed of a metal having a certain degree of impact absorbing performance, and the strength-reinforcing layer 140 is formed of a metal having superior rigidity and abrasion resistance as compared with the impact- For example, the impact absorbing layer 120 is formed of nickel alloy steel (inconel), and the strength reinforcing layer 140 is formed of a cobalt alloy (stellite). As a result, the strength of the sealing surface is reinforced, a certain degree of impact can be absorbed, and the sealing surface can be reinforced.

상기 충격흡수층(120)은 복수 층으로 형성될 수 있다. 바람직한 용접법으로는 버터링용접인바, 버터링용접으로 1개 층을 형성하고 그 위해 동일한 버터링용접을 필요한 횟수만큼 반복하여 복수 층으로 형성하게 된다. 바람직하게는 3개 층 이상으로 형성되는 것이다. 용접 후 표면가공을 통해 최종적으로 2mm 이상의 두께로 강도보강층이 형성되게 한다.. The shock absorbing layer 120 may be formed of a plurality of layers. In the preferred welding method, one layer is formed by the buttering welding and the buttering welding, and the same buttering welding is repeated for the required number of times to form a plurality of layers. Preferably three or more layers. After the welding process, the final reinforcement layer is formed with a thickness of 2 mm or more.

마찬가지로 상기 강도보강층(140)도 복수 층으로 형성될 수 있다. 바람직한 용접법으로는 표면경화용접인바, 표면경화용접으로 1개 층을 형성하고 그 위해 동일한 표면경화용접을 필요한 횟수만큼 반복하여 복수 층으로 형성하게 된다. 바람직하게는 3개 층 이상으로 형성되는 것이고, 용접 후 표면가공을 통해 최종적으로 2mm이상의 두께로 강도보강층이 형성되게 한다. Similarly, the strength reinforcing layer 140 may be formed of a plurality of layers. In the preferred welding method, one layer is formed by surface hardening welding and surface hardening welding, and the same surface hardening welding is repeated for the required number of times to form a plurality of layers. Preferably three or more layers, and the strength reinforcing layer is finally formed to a thickness of 2 mm or more through surface processing after welding.

상기와 같이 충격흡수층(120)과 강도보강층(140)이 각각 복수 층으로 형성되는 구조에 따르면 소망하는 두께의 용접층을 얻는데 유리하다. 한 번에 소망하는 두께로 용접을 하게 되면 용접봉을 한 번에 많이 녹여서 형성하여야 함에 따른 어려움이 있는데, 그러한 문제를 해결할 수 있는 것이다. According to the structure in which the impact absorbing layer 120 and the strength reinforcing layer 140 are formed in a plurality of layers as described above, it is advantageous to obtain a welding layer having a desired thickness. If the welding is performed at a desired thickness at a time, there is a difficulty in forming the electrode by melting a lot of the welding electrode at a time, and such a problem can be solved.

증착코팅층(160)은 고 경도의 금속으로 형성하게 된다. 강도보강층(140)을 형성하는 금속보다 경도가 높은 금속을 선택하여 증착하게 되는데, 증착코팅층(160)의 두께는 대략 20㎛를 넘지 않게 형성하는 것이 바람직하다. 이러한 증착코팅층(160)은 충격흡수층(120)과 강도보강층(140)이 박리되는 것을 방지하여 주는 기능을 함과 아울러 강도보강층(140)을 보호하고 더욱 높은 강도로 표면을 형성하여 강도를 극대화하는 역할을 하게 된다.The deposition coating layer 160 is formed of a metal having a high hardness. A metal having a hardness higher than that of the metal forming the strength reinforcing layer 140 is selected and deposited. It is preferable that the thickness of the deposition coating layer 160 is formed not to exceed about 20 占 퐉. The vapor deposition coating layer 160 functions to prevent the impact absorbing layer 120 and the strength reinforcing layer 140 from being separated from each other and protects the strength reinforcing layer 140 and forms a surface with a higher strength to maximize the strength .

이상이 구조에 따르면 밸브의 개폐과정에서 발생하는 충격을 충격흡수층(120)이 흡수하여 파손을 방지하게 되고, 강도보강층(140)과 증착코팅층(160)에 의해 밀봉부의 강도가 보강됨으로써 내마모성이 확보되어 유체의 흐름에 의한 마모 침식에 견디는 능력이 향상된다.According to the above structure, the shock absorbing layer 120 absorbs impact generated during the opening and closing of the valve to prevent breakage, and the strength of the sealing portion is reinforced by the strength reinforcing layer 140 and the deposition coating layer 160, So that the ability to withstand abrasion erosion due to fluid flow is improved.

이하, 상기와 같이 밸브 트림 밀봉부(A)를 보강하는 방법을 설명한다.Hereinafter, a method of reinforcing the valve trim seal A as described above will be described.

먼저, 플러그와 시트링을 준비한다. 고온용 마르텐사이트(martensite) 계열의 스테인레스강, 예를 들면 SUH616을 사용하여 플러그와 시트링을 제작한다. 이때 담금질 및 뜨임을 하여 소망하는 물성으로 형성하는 열처리단계를 거치게 되는데, 담금질은 1020~1060℃, 뜨임은 650~680℃의 온도 조건에서 2시간 이상 충분한 시간을 들여 수행한다.First, prepare the plug and seat ring. A plug and a seat ring are manufactured using stainless steel of martensite series for high temperature, for example, SUH616. At this time, quenching and tempering are performed to form a desired physical property. Quenching is performed at a temperature of 1020 to 1060 ° C and tempering is performed at a temperature of 650 to 680 ° C for 2 hours or more.

이후, 플러그와 시트링에 형성되는 밀봉면의 표면을 정리한다. 황삭단계를 통해 황삭가공을 하여 표면을 비교적 거칠게 형성하게 된다. 표면을 비교적 거칠게 형성함으로써 용접과정에서 용접되는 금속이 밀봉면에 견고하게 잘 달라붙을 수 있게 된다. Then, the surfaces of the sealing surfaces formed on the plug and the seat ring are arranged. Roughing is performed through the roughing step to form a relatively rough surface. By forming the surface relatively rough, the metal being welded in the welding process can be firmly attached to the sealing surface.

이후 밀봉면에 충격흡수층형성단계로 돌입하여 충격흡수층(120)을 형성한다. 충격흡수층(120)은 충격흡수성능을 가진 금속, 예를 들면 니켈합금강(인코넬, inconel)으로 형성된 용접봉을 이용해 밀봉면에 용접을 함으로서 형성하게 된다. 용접방법은 버터링용접이 바람직하고, 1개 층을 형성한 다음 동일한 과정을 반복하여 복수 층으로 용접층을 형성하게 된다. 바람직하게는 3개 층 이상으로 용접층을 형성하는 것이다. And then enters the shock absorbing layer forming step on the sealing surface to form the shock absorbing layer 120. The impact absorbing layer 120 is formed by welding a sealing surface using a metal formed of a metal having impact absorbing capability, for example, a nickel alloy steel (inconel). The welding method is preferably buttering welding, and one layer is formed and then the same process is repeated to form a plurality of layers of welding layers. Preferably, the weld layer is formed in three or more layers.

상기 충격흡수층(120) 형성 과정에서 복수 층으로 형성되는 용접층의 전체 두께는 4mm이상으로 형성되는 것이 바람직하다. 필요한 충격흡수층(120)의 두께보다 두껍게 형성하는 것인바, 용접이 완료되면 표면을 가공하여 소망하는 두께로 충격흡수층(120)을 형성하게 된다. 바람직한 두께는 2~3mm 정도이나, 그에 한정되지는 않고 필요에 따라 조절할 수 있다. In the process of forming the impact absorbing layer 120, the total thickness of the welding layer formed in a plurality of layers is preferably 4 mm or more. Is formed thicker than the required thickness of the shock absorbing layer 120. When the welding is completed, the surface is processed to form the impact absorbing layer 120 with a desired thickness. The preferable thickness is about 2 to 3 mm, but it is not limited thereto and can be adjusted as needed.

충격흡수층(120)의 형성이 완료되면 강도보강층(140)을 충격흡수층(120) 위에 형성하게 된다. 강도보강층형성단계인바, 상기 강도보강층(140)은 충격흡수층(120)에 비해 높은 강성을 가진 금속, 예를 들면 코발트합금(스텔라이트, stellite)재질의 용접봉(ERCoCr-A STELLITE #6)을 이용해 용접을 하여서 형성하게 된다. 용접방법은 표면경화용접이 바람직하고, 1개 층을 형성한 다음 동일한 과정을 반복하여 복수 층으로 용접층을 형성하게 된다. 바람직하게는 3개 층 이상으로 용접층을 형성하는 것이다. When the formation of the shock absorbing layer 120 is completed, the strength reinforcing layer 140 is formed on the impact absorbing layer 120. The strength reinforcing layer 140 may be formed by using a metal having a higher rigidity than the impact absorbing layer 120 such as a cobalt alloy stellite electrode (ERCoCr-A STELLITE # 6) Welded. The welding method is preferably surface hardening welding, and one layer is formed and then the same process is repeated to form the welding layer in a plurality of layers. Preferably, the weld layer is formed in three or more layers.

상기 강도보강층(140) 형성 과정에서 복수 층으로 형성되는 용접층의 두께는 4mm이상으로 형성되는 것이 바람직하다. 필요한 강도보강층(140)의 두께보다 두껍게 형성하는 것인바, 용접이 완료되면 표면을 연마하여 소망하는 두께로 강도보강층(140)을 형성하게 된다. 이와 같이 형성되는 강도보강층(140)의 두께는 2~3mm 정도이나, 그에 한정되지는 않는다. The thickness of the welding layer formed in the plurality of layers in the process of forming the strength reinforcing layer 140 is preferably 4 mm or more. Is formed thicker than the required thickness of the strength reinforcing layer 140. When the welding is completed, the surface is polished to form the strength reinforcing layer 140 with a desired thickness. The thickness of the strength reinforcing layer 140 thus formed is about 2 to 3 mm, but the thickness is not limited thereto.

이상에 따라 강도보강층(140) 까지 형성이 완료되면 증착코팅층형성단계로 돌입한다. 이 단계에서는 상기 강도보강층(140) 위에 금속을 증착하여 층착코팅층(160)을 형성하게 된다. 증착방법으로는 물리증착법(PVD:Physical Vapor Deposition Process)을 사용한다. 이때 증착에 사용되는 금속 물성은 _Al,Ti,Cr,Si,C,N 등 이다. 상기 금속을 사용하는 이유로는 충분한 강성을 유지할 수 있기 때문이다. 한편, 증착코팅층(160)의 두께는 20㎛를 넘지 않도록 하는 것이 바람직하다. When the formation of the strength enhancement layer 140 is completed, the process proceeds to the deposition coating layer formation step. In this step, a metal is deposited on the strength-reinforcing layer 140 to form a layer-coating layer 160. A physical vapor deposition process (PVD) is used as a deposition method. Ti, Cr, Si, C, N and the like are used for the deposition. The reason for using the metal is that sufficient rigidity can be maintained. On the other hand, it is preferable that the thickness of the deposition coating layer 160 does not exceed 20 탆.

한편, 상기 강도보강층형성단계 이후 상기 증착코팅층형성단계 이전에 열처리단계 및 정삭 및 연마단계를 거칠 수 있다. Meanwhile, after the strength reinforcing layer forming step, the heat treatment step, finishing and polishing step may be performed before the deposition coating layer forming step.

열처리단계에서는 700~800℃의 온도로 30분 내지 1시간 동안 가열한 후 로에서 서서히 냉각하게 된다. 이를 통해 용접을 하여 형성되는 상기 충격흡수층(120)과 강도보강층(140)에 쌓여있는 응력을 제거할 수 있게 된다. In the heat treatment step, the mixture is heated at a temperature of 700 to 800 ° C for 30 minutes to 1 hour, and gradually cooled in the furnace. The stress accumulated in the impact absorbing layer 120 and the strength reinforcing layer 140 formed by welding can be removed.

정삭 및 연마단계에서는 밀봉면에 충격흡수층(120)과 강도보강층(140)에 의해 형성되는 용접층의 두께를 결정한다. 정삭하고 연마하는 과정을 통해 용접층을 소망하는 두께까지 깎아내고 소망하는 형상을 이루게 가공을 하게 된다. 플러그(100)와 시트링(200)에 형성된 밀봉면에 각각 형성된 용접층이 서로 딱 맞게 면접되도록 마무리 가공을 하는 것이다. In the finishing and polishing step, the thickness of the weld layer formed by the impact absorbing layer 120 and the strength reinforcing layer 140 is determined on the sealing surface. Through the finishing and polishing process, the welding layer is cut to a desired thickness and processed to have a desired shape. The welding process is performed so that the welding layers formed respectively on the sealing surfaces formed on the plug 100 and the seat ring 200 are in perfect fit with each other.

이상의 과정을 거쳐 본 발명에 의한 밸브 트림 밀봉부(A)가 보강된다. 이와 같이 보강됨으로써 마모 침식에 견디는 능력 및 충격에 견디는 능력이 극대화되게 되고, 그 결과 밸브의 수명이 연장될 뿐만 아니라 고온 고압의 가혹한 유체 흐름 조건 하에서도 안정적인 성능을 구현하게 된다. Through the above-described process, the valve trim sealing portion A according to the present invention is reinforced. As a result, it is possible to maximize the ability to withstand abrasion erosion and to withstand impact, thereby extending the service life of the valve and achieving stable performance even under conditions of high temperature and high pressure and severe fluid flow.

A : 밀봉부,
100 : 플러그, 120 : 충격흡수층,
140 : 강도보강층, 160 : 증착코팅층,
200 : 시트링.
A: seal,
100: plug, 120: shock absorbing layer,
140: strength reinforcing layer, 160: vapor deposition coating layer,
200: Seat ring.

Claims (9)

유체가 흐르는 통로와 상기 통로를 개방하거나 폐쇄함으로써 유체의 흐름을 제어하는 플러그 또는 시트링에 형성되는 밀봉면에 용접층이 형성되되,
상기 용접층은 충격흡수 성능을 가진 금속으로 형성되는 충격흡수층(120)과 상기 충격흡수층(120)위에 충격흡수층(120)을 형성하는 금속보다 강성이 큰 금속으로 형성되는 강도보강층(140)을 포함하여 밀봉부가 보강되는 밸브 트림 밀봉부 보강구조.
A welding layer is formed on a sealing surface formed on a plug or a seat ring for controlling the flow of fluid by opening and closing the passage and a passage through which the fluid flows,
The welding layer includes an impact absorbing layer 120 formed of a metal having shock absorbing capability and an intensity reinforcing layer 140 formed of a metal having a higher rigidity than the metal forming the impact absorbing layer 120 on the impact absorbing layer 120 Thereby reinforcing the seal portion.
제1 항에 있어서,
상기 강도보강층(140) 위에 금속이 증착되어 형성되는 층착코팅층(160)이 더 포함되는 밸브 트림 밀봉부 보강구조.
The method according to claim 1,
Wherein the strength-enhancing layer (140) further comprises a layer of coating (160) formed by depositing metal on the strength-enhancing layer (140).
제1 항에 있어서,
상기 충격흡수층(120)은 버터링용접으로 형성되는 복수의 니켈합금강 용접층인 밸브 트림 밀봉부 보강구조.
The method according to claim 1,
The impact absorbing layer (120) is a plurality of nickel alloy steel weld layers formed by buttering welding.
제1 항에 있어서,
상기 강도보강층(140)은 표면경화용접으로 형성되는 복수의 코발트합금 용접층인 밸브 트림 밀봉부 보강구조.
The method according to claim 1,
The strength-enhancing layer (140) is a plurality of cobalt alloy weld layers formed by surface hardening welding.
유체가 흐르는 통로와 상기 통로를 개방하거나 폐쇄함으로써 유체의 흐름을 제어하는 플러그 또는 시트링에 형성되는 밀봉면을 열처리하는 열처리단계,
상기 밀봉면을 황삭하여 표면을 정리하는 황삭단계,
상기 황삭단계에서 표면이 정리된 밀봉면에 충격흡수성능을 가진 금속을 용접하여 충격흡수층(120)을 형성하는 충격흡수층형성단계,
상기 충격흡수층(120) 위에 강성을 가진 금속을 용접하여 강도보강층(140)을 형성하는 강도보강층형성단계,를 포함하여 밸브 트림 밀봉부를 보강하는 밸브 트림 밀봉부 보강방법.
A heat treatment step of heat-treating a sealing surface formed on a plug or a seat ring for controlling the flow of fluid by opening and closing the passage,
A roughing step of roughing the sealing surface and arranging the surface,
An impact-absorbing layer forming step of forming an impact-absorbing layer 120 by welding a metal having an impact-absorbing performance to a sealing surface whose surfaces are arranged in the roughing step,
And forming a strength reinforcing layer (140) by welding a metal having a rigidity on the impact absorbing layer (120) to reinforce the valve trim sealing portion.
제5 항에 있어서,
상기 강도보강층(140) 위에 금속을 증착하여 층착코팅층(160)을 형성하는 증착코팅층형성단계,를 더 포함하는 밸브 트림 밀봉부 보강방법.
6. The method of claim 5,
And forming a deposition coating layer (160) by depositing a metal on the strength reinforcing layer (140).
제5 항에 있어서,
상기 충격흡수층(120)은 버터링용접으로 니켈합금강을 용접하여 용접층을 형성한 것이되, 상기 용접층은 버터링용접을 복수회 반복하여 복수의 층을 이루게 형성되는 밸브 트림 밀봉부 보강방법.
6. The method of claim 5,
Wherein the impact absorbing layer (120) is formed by welding nickel alloy steel by buttering welding to form a weld layer, wherein the weld layer is formed by a plurality of times of buttering welding to form a plurality of layers.
제5 항에 있어서,
상기 강도보강층(140)은 표면경화용접으로 코발트합금을 용접하여 용접층을 형성한 것이되, 상기 용접층은 표면경화용접을 복수회 반복하여 복수 층으로 형성되는 밸브 트림 밀봉부 보강구조.
6. The method of claim 5,
Wherein the strength reinforcing layer (140) is formed by welding a cobalt alloy by surface hardening welding to form a weld layer, wherein the weld layer is formed of a plurality of layers by repeating surface hardening welding a plurality of times.
제5 항에 있어서,
상기 강도보강층형성단계 이후 응력제거를 위한 열처리단계 및 소망하는 치수와 형상으로의 형성을 위한 정삭 및 연마단계,를 더 포함하는 밸브 트림 밀봉부 보강구조.
6. The method of claim 5,
A heat treatment step for removing stress after the strength reinforcing layer forming step, and a finishing and polishing step for forming a desired dimension and shape.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102100280B1 (en) 2019-12-10 2020-04-13 김충호 A method for manufacturing of valve trim for improving performance Using harsh conditions of Electric Power Plant and valve trim thereof
CN115092528A (en) * 2022-07-07 2022-09-23 中国工程物理研究院总体工程研究所 High-overload-resistant valve through-wall sealing connection structure

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KR101091584B1 (en) 2011-06-16 2011-12-13 김충호 Valve trim apparatus for prohibiting scale attatchment and manufacturing method thereof

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
KR101091584B1 (en) 2011-06-16 2011-12-13 김충호 Valve trim apparatus for prohibiting scale attatchment and manufacturing method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102100280B1 (en) 2019-12-10 2020-04-13 김충호 A method for manufacturing of valve trim for improving performance Using harsh conditions of Electric Power Plant and valve trim thereof
CN115092528A (en) * 2022-07-07 2022-09-23 中国工程物理研究院总体工程研究所 High-overload-resistant valve through-wall sealing connection structure
CN115092528B (en) * 2022-07-07 2024-04-02 中国工程物理研究院总体工程研究所 High overload resistant valve through-wall sealing connection structure

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