KR20120044613A - Ball of ball-valve thermal spray coating - Google Patents

Ball of ball-valve thermal spray coating Download PDF

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Publication number
KR20120044613A
KR20120044613A KR1020100105997A KR20100105997A KR20120044613A KR 20120044613 A KR20120044613 A KR 20120044613A KR 1020100105997 A KR1020100105997 A KR 1020100105997A KR 20100105997 A KR20100105997 A KR 20100105997A KR 20120044613 A KR20120044613 A KR 20120044613A
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South Korea
Prior art keywords
ball
valve
spray coating
coating layer
thermal spray
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KR1020100105997A
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Korean (ko)
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정선구
김덕보
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주식회사 두산이노텍
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Priority to KR1020100105997A priority Critical patent/KR20120044613A/en
Publication of KR20120044613A publication Critical patent/KR20120044613A/en

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    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0657—Particular coverings or materials

Abstract

PURPOSE: A ball for a thermal spray coated ball valve is provided to extend service life by obtaining surface hardness and durability as forming a thermal spray coating layer on the ball surface of a ball valve. CONSTITUTION: A ball for a thermal spray coated ball valve comprises a valve body, a ball(4), and a pair of valve seats. A passage in which fluid flows is formed inside the valve body. The ball is rotatably coupled in the valve body and controls fluid flow by rotating depending on operation of a handle. A thermal coating layer(9) by plasma spray is formed on a ball surface to increase surface hardness and durability. The valve seats are embedded in the valve body and rotatably support the ball.

Description

용사코팅된 개폐밸브용 볼{ball of ball-valve thermal spray coating}Ball of ball-valve thermal spray coating

본 발명은 관로(管路) 내에 개폐가능하게 설치되어 유체 흐름을 자동 또는 수동으로 단속할 수 있도록 한 개폐밸브용 볼에 관한 것이다.The present invention relates to a ball for an on-off valve which is installed to be openable and openable in a pipeline so that fluid flow can be controlled automatically or manually.

더욱 상세하게는, 볼 표면에 내마모성, 내박리성, 내부식성을 갖도록 용사코팅층을 형성하여 볼 표면에서의 경도를 증대시켜 내구성을 확보하고, 볼 및 밸브시트의 상호 접촉부위에서의 기밀이 유지될 수 있도록 한 용사코팅된 개폐밸브용 볼에 관한 것이다.More specifically, the spray coating layer is formed on the surface of the ball to have wear resistance, peeling resistance, and corrosion resistance, thereby increasing hardness at the surface of the ball to ensure durability, and airtightness at the mutual contact portion of the ball and the valve seat can be maintained. The invention relates to a ball for a thermally coated on / off valve.

도 1에 도시된 일반적인 개폐밸브는, 대칭형으로 분할형성되어 조립되는 밸브몸체(1,2)와,The general on-off valve shown in Figure 1, the valve body (1, 2) is divided into a symmetrical form and assembled,

밸브몸체(1,2) 내에 형성되는 밸브실(3)에 회전가능하게 설치되며, 내부에 통로가 관통형성된 볼(4)과,A ball (4) rotatably installed in the valve chamber (3) formed in the valve body (1, 2) and having a passage formed therein;

볼(4) 외측면을 회전가능하게 지지하는 한 쌍의 밸브시트(5,6)와,A pair of valve seats 5 and 6 rotatably supporting the outer surface of the ball 4,

볼(4) 외측면에 형성된 요홈(4a)에 고정되며 손잡이(7)의 회전조작에 따라 볼(4)을 90도 범위내에서 회전시키는 밸브스템(8)을 포함한다.It is fixed to the groove (4a) formed on the outer surface of the ball (4) includes a valve stem (8) for rotating the ball (4) within a 90 degree range in accordance with the rotation operation of the handle (7).

전술한 바와 같은 개폐밸브(10)는, 사용자에 의해 손잡이(7)를 조작함에 따라 밸브실(3)에 결합된 개폐용 볼(4)이 한 쌍의 밸브시트(5,6)에 대해 접촉된 상태에서 90도 범위내에서 회전되므로 유체 흐름을 허용하거나, 또는 차단할 수 있는 구조를 갖는다.As described above, the opening / closing valve 10 is contacted with the pair of valve seats 5 and 6 by the opening / closing ball 4 coupled to the valve chamber 3 as the user operates the handle 7 by the user. It rotates within a range of 90 degrees in the set state, and thus has a structure that allows or blocks the flow of fluid.

한편, 볼의 개폐시 볼과 밸브시트의 상호 접촉부위를 밀폐시켜 기밀을 유지할 수 있도록 이들의 외측면에 코팅층을 형성하여 볼과 밸브시트의 내마모성을 확보하게 된다. 즉 개폐밸브를 이루는 밸브시트의 외측면에 니켈, 크롬, 텡스텐, 코발트 등의 미립자로 된 금속혼합물을 분사시켜 코팅층을 형성하거나, PVD코팅(TiN,TiAlN)한 후, 후가공으로 코팅층의 외측면을 표면 연마하게 된다.On the other hand, when the opening and closing of the ball to seal the mutual contact between the ball and the valve seat to form a coating layer on the outer surface to maintain the airtight to ensure the wear resistance of the ball and the valve seat. In other words, a metal layer made of fine particles such as nickel, chromium, tungsten, and cobalt is sprayed on the outer surface of the valve seat forming the open / close valve to form a coating layer, or after PVD coating (TiN, TiAlN), the outer surface of the coating layer by post processing. Surface polishing.

이때 볼과 밸브시트의 외측면에 코팅된 코팅층은 밸브시트 및 볼의 잦은 개폐로 인해 이송되는 유체가 고온일 경우 개폐밸브의 온도가 상승하게 된다. 고온으로 상승시 코팅층이 팽창되어 박리현상이 발생되며, 코팅층의 외측면을 표면 연마한 후 반드시 후가공 공정을 거쳐야 한다. 즉 볼과 밸브시트의 외측면만을 코팅할 수 있어 볼과 밸브시트의 내측면을 코팅할 수 없는 단점을 갖는다.In this case, the coating layer coated on the outer surface of the ball and the valve seat has a high temperature of the on-off valve when the fluid to be transferred is high due to frequent opening and closing of the valve seat and the ball. When the temperature rises to a high temperature, the coating layer expands and peeling occurs. The surface of the coating layer must be ground and then subjected to a post-processing process. That is, since only the outer surface of the ball and the valve seat can be coated, the inner surface of the ball and the valve seat cannot be coated.

전술한 바와 같이 밸브시트의 내열성 및 내마모성이 현저하게 떨어져 개폐밸브의 사용수명이 단축되고, 볼 및 밸브시트의 마찰이 증가되어 작동부의 회전토크가 커지게 되므로 액츄에이터를 소형화시켜야 된다. 또한 코팅층의 외측면을 매끄럽게 가공하는 후가공 공정을 거치게 되어 생산성이 떨어지는 단점을 갖는다.As described above, since the heat resistance and wear resistance of the valve seat are remarkably reduced, the service life of the on-off valve is shortened, the friction of the ball and the valve seat is increased, and the rotational torque of the operating part is increased, so the actuator must be miniaturized. In addition, there is a disadvantage in that the productivity is reduced by going through a post-processing process for smoothly processing the outer surface of the coating layer.

한편, 밸브시트 및 볼의 외측면에 화학증착 방식에 의한 플라즈마-CVD코팅층을 형성하였으나, 이 경우 볼을 제작시 볼이 수축되어 정확한 사이즈와 오차로 인해 유체의 누설이 발생될 수 있다. 이로 인해 개폐밸브를 재가공시 제작비용이 증가되며, 볼에 코팅층을 형성할 경우 볼의 정확한 사이즈를 제작하기가 어려운 단점을 갖는다.Meanwhile, although the plasma-CVD coating layer was formed on the outer surface of the valve seat and the ball by the chemical vapor deposition method, in this case, the ball may be contracted when the ball is manufactured, and fluid leakage may occur due to the correct size and error. As a result, the manufacturing cost is increased when the on-off valve is reworked, and when the coating layer is formed on the ball, it is difficult to manufacture the correct size of the ball.

또한, 볼을 황동으로 주조하여 볼 형태로 갖도록 성형한 후, 이를 선반가공에 의해 볼의 형상을 원형으로 가공하며, 원형의 볼 외측면에 회전축 결합홈을 절삭 가공하며, 유체가 통과되는 관통공을 형성하며, 2차로 볼 외측면 및 내측면을 스테인레스스틸(STS)재로서 코팅할 경우, 개폐밸브의 원가비용 및 제작비용이 상승되며, 볼의 표면이 매끄럽지 못하며, 장시간 사용시 코팅층이 벗겨져 유체가 누설되는 단점을 갖는다.In addition, the ball is cast in brass to be shaped to have a ball shape, which is then processed into a circular shape by lathe machining, and a rotating shaft coupling groove is cut on the outer surface of the circular ball, and a through hole through which a fluid passes. In the case of coating the outer side and the inner side of the ball with stainless steel (STS), the cost and manufacturing cost of the valve are increased, the surface of the ball is not smooth, and the coating layer is peeled off for a long time. Has the disadvantage of leaking.

한편, 볼 표면을 연마부재에 의해 연마할 경우, 작업자가 직접 볼을 파지한 상태에서 연마포지가 다수개 겹쳐진 연마부재(연마석을 말함)를 소정속도로 회전시키고, 연마부재의 접촉에 의해 볼을 연마하게 된다. 이로 인해 능숙한 숙련자가 아니면 표면이 균일하게 연마되지않고, 광택에 의한 조도가 표면마다 차이가 발생하여 불량품으로 처리되는 단점을 갖는다.On the other hand, when the ball surface is polished by the polishing member, the polishing member (referred to as abrasive stone) in which a plurality of polishing cloths are stacked is rotated at a predetermined speed while the worker grips the ball directly, and the ball is contacted by the polishing member. Polishing As a result, the surface is not uniformly polished unless the skilled person is skilled, and the roughness caused by the gloss is different for each surface, so that the surface is treated as a defective product.

한편, 볼 표면을 연마부재의 접촉에 의해 연마할 경우, 볼과 연마부재의 상호 마찰접촉으로 인해 연마후 자화되어 볼에 잔류되는 자기를 탈자기에 의해 제거(degaussing)하게 된다. 즉 잔류자기는 먼지, 금속가루 등을 끌어당겨 볼의 오염, 표면손상 및 부식을 초래함에 따라 볼 연마후 마무리 작업공정으로 반드시 탈자시켜야 된다.On the other hand, when the surface of the ball is polished by the contact of the polishing member, the magnetization after magnetization due to the frictional contact between the ball and the polishing member is degaussing by the demagnetizer. That is, residual magnetism must be demagnetized as a finishing process after grinding the ball, as it attracts dust and metal powder and causes contamination, surface damage and corrosion of the ball.

본 발명의 실시예는, 관로 내에 개폐가능하게 설치되는 개폐밸브의 볼 표면에 내마모성, 내박리성 및 내부식성을 갖도록 용사코팅층을 형성하여 볼 표면의 내구성을 확보할 수 있도록 한 용사코팅된 개폐밸브용 볼과 관련된다.Embodiment of the present invention, the spray-coated on-off valve to ensure the durability of the ball surface by forming a spray coating layer to have abrasion resistance, peeling resistance and corrosion resistance on the ball surface of the opening and closing valve that is installed in the pipeline Related to the dragon ball.

본 발명의 실시예는, 볼과 밸브시트의 상호 접촉부위에서의 내마모성이 유지되어 사용수명을 연장하고, 접촉부위에서의 기밀이 유지되므로 유체의 누설을 방지할 수 있도록 한 용사코팅된 개폐밸브용 볼과 관련된다.Embodiment of the present invention, and the spray-coated on-off valve ball for maintaining the wear resistance at the contact portion of the ball and the valve seat to extend the service life, the airtight at the contact portion to prevent the leakage of fluid and Related.

본 발명의 실시예는, 볼 연마시 연마로 인한 연마무늬가 표면에 생성되지않고, 볼에 잔류자기(磁氣) 생성을 최소화(0.5?1가우스(gauss) 정도임)하여 자기 잔류로 인해 볼을 부식시키거나, 유체 흐름을 간섭하는 것을 방지할 수 있도록 한 용사코팅된 개폐밸브용 볼과 관련된다.In the embodiment of the present invention, the polishing pattern is not generated on the surface when the ball is polished, and the residual magnetic field is minimized (about 0.5 to 1 gauss) on the ball so that the ball remains due to the magnetic residue. Associated with a spray coated ball valve for preventing corrosion and interference with fluid flow.

본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼은,The thermally coated ball valve for thermal spraying according to an embodiment of the present invention,

내부에 유체가 흐르는 통로가 형성되는 밸브몸체와, 밸브몸체 내에 회전가능하게 결합되며 손잡이의 조작에 따라 회전되어 유체 흐름을 단속하는 볼과, 밸브몸체에 내설되어 볼을 회전가능하게 지지하는 한 쌍의 밸브시트를 포함하는 개폐밸브용 볼에 있어서,A valve body in which a fluid flow path is formed therein, a ball rotatably coupled in the valve body and rotated according to the manipulation of the handle to interlock fluid flow, and a pair built in the valve body to rotatably support the ball. In the ball for valves containing a valve seat of,

볼의 표면에 표면경도 및 내구성을 증대시킬 수 있도록 플라즈마 용사에 의한 용사코팅층이 형성된다.The spray coating layer by the plasma spray is formed on the surface of the ball to increase the surface hardness and durability.

더욱 바람직한 실시예에 의하면, 전술한 용사코팅층은 100?1500㎛ 두께범위내로 형성될 수 있다.According to a more preferred embodiment, the above spray coating layer may be formed in a thickness range of 100 ~ 1500㎛.

전술한 바와 같이 구성되는 본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼은 아래와 같은 이점을 갖는다.The thermal spray coated ball valve for opening and closing according to the embodiment of the present invention configured as described above has the following advantages.

가스관, 상수도 배관 등의 관로 내에 개폐가능하게 설치되는 개폐밸브의 볼 표면에 용사코팅층을 형성하여 볼 표면의 경도 및 내구성을 확보하여 사용수명을 연장할 수 있다.The spray coating layer is formed on the ball surface of the on-off valve that can be opened and closed in a pipeline such as a gas pipe, a water pipe, and the like to secure the hardness and durability of the ball surface, thereby extending its service life.

또한, 볼과 밸브시트의 상호 접촉부위에서의 내마모성이 유지되어 기밀이 유지되므로 접촉부위의 틈새를 통한 유체의 누설을 방지할 수 있다.In addition, since the wear resistance at the contact portion of the ball and the valve seat is maintained and airtight, it is possible to prevent the leakage of fluid through the gap of the contact portion.

또한, 볼 연마시 연마로 인한 연마무늬(미세한 돌출부를 말함)가 표면에 생성되지않아 표면 가공정밀도를 높이고 볼에 잔류자기(磁氣) 생성을 최소화하여 자기 잔류로 인해 볼을 부식시키거나, 유체 흐름을 간섭하는 것을 방지할 수 있다.In addition, when the ball is polished, a polishing pattern (referring to a minute protrusion) due to polishing is not generated on the surface, thereby increasing the surface processing precision and minimizing the generation of residual magnetic on the ball, thereby corroding the ball due to magnetic residue, Interfering with the flow can be prevented.

도 1은 일반적인 개폐밸브의 단면도,
도 2는 본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼의 단면도,
도 3은 본 발명의 실시예에 의한 용사코팅된 개폐밸브의 개략도,
도 4는 본 발명의 실시예에 의한 개폐밸브용 볼을 연마하는 연마장치의 개략도이다.1 is a cross-sectional view of a general on-off valve,
Figure 2 is a cross-sectional view of the thermal spray coating ball valve for opening and closing according to an embodiment of the present invention,
3 is a schematic view of the thermally coated on-off valve according to an embodiment of the present invention,
4 is a schematic view of a polishing apparatus for polishing a ball for an on / off valve according to an embodiment of the present invention.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는 것이다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to describe in detail enough to enable those skilled in the art to easily practice the invention, and therefore It does not mean that the technical spirit and scope of the present invention is limited.

도 2 및 도 3에 도시된 본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼은,The thermal spray coated ball valve for opening and closing according to the embodiment of the present invention shown in Figure 2 and 3,

내부에 유체가 흐르는 통로가 형성되는 밸브몸체(1,2)와, 밸브몸체(1,2) 내에 회전가능하게 결합되며 손잡이(7)의 조작에 따라 회전되어 유체 흐름을 단속하는 볼(4)과, 밸브몸체(1,2)에 내설되어 볼(4)을 회전가능하게 지지하는 한 쌍의 밸브시트(5,6)를 포함하는 개폐밸브용 볼에 있어서,The valve body (1,2) is formed in the passage of the fluid flow therein, and the ball (4) rotatably coupled in the valve body (1,2) and rotated to control the fluid flow by operating the handle (7) And a pair of valve seats (5, 6) which are built into the valve bodies (1, 2) and rotatably support the ball (4).

볼(4)의 표면에 표면경도 및 내구성을 증대시킬 수 있도록 플라즈마 용사에 의한 용사코팅층(9)이 형성된다.On the surface of the ball 4, a thermal spray coating layer 9 by plasma spraying is formed to increase the surface hardness and durability.

전술한 개폐밸브(10)의 볼(4)의 용사코팅층(9)은 100?1500㎛ 두께범위내로 형성될 수 있다.The thermal spray coating layer 9 of the ball 4 of the opening and closing valve 10 may be formed in a thickness range of 100 ~ 1500㎛.

이때, 용사코팅층(9)은 텡스텐 분말과 볼(4)의 상호 접착력을 높이고 용사코팅층(9)의 기공율이 감소되도록, 텡스텐 분말을 1000?3000℃의 불활성가스(산소, 질소, 아르곤 등)를 열원으로 이용한 플라즈마 용사에 의해 용융상태로 볼(4)의 표면에 600?1000m/s속도로서 분사시켜 100?1500㎛두께를 갖도록 형성된다. 볼(4) 표면에 대한 용사코팅층의 코팅방법에 대한 기술내용 자체는 당해분야에서 사용되는 것이므로 이들의 상세한 설명은 생략한다.At this time, the thermal spray coating layer 9 is a tungsten powder inert gas (oxygen, nitrogen, argon, etc.) of 1000 ~ 3000 ℃ to increase the mutual adhesion between the tungsten powder and the ball 4 and to reduce the porosity of the thermal spray coating layer (9) ) Is sprayed at the surface of the ball 4 at a speed of 600 to 1000 m / s in a molten state by a plasma spray using a heat source to form a thickness of 100 to 1500 µm. Since the technical content itself of the coating method of the thermal spray coating layer on the surface of the ball 4 is used in the art, detailed description thereof will be omitted.

이하에서, 본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼의 사용예를 첨부된 도면을 참조하여 상세하게 설명한다.In the following, with reference to the accompanying drawings an example of the use of the spray-coated on-off valve ball according to an embodiment of the present invention will be described in detail.

도 2 및 도 3에서와 같이, 전술한 개폐밸브(10)의 볼(4) 표면에 형성되는 용사코팅층(9)에 의해 밸브몸체(1,2)에 대한 볼(4)의 개폐시 저마찰력, 내마모성, 내부식성 요건이 충족되므로 볼(4) 표면에서의 표면경도 및 내마모성, 내박리성, 내부식성의 내구성이 증대된다. 또한 밸브몸체(1,2)에 대한 볼(4)의 잦은 계폐동작에도 밸브시트(5,6) 및 볼(4)의 상호접촉부위에서의 기밀상태가 유지되므로 유체 누설을 방지할 수 있다.As shown in Figures 2 and 3, the low friction force during opening and closing of the ball 4 to the valve body (1, 2) by the thermal spray coating layer 9 formed on the surface of the ball (4) of the opening and closing valve 10 described above Since the wear resistance and corrosion resistance requirements are satisfied, the surface hardness and wear resistance, peeling resistance and corrosion resistance durability at the surface of the ball 4 are increased. In addition, even in the frequent closing operation of the ball (4) to the valve body (1, 2) it is possible to prevent the fluid leakage because the airtight state at the mutual contact portion of the valve seat (5, 6) and the ball (4) is maintained.

도 4에서와 같이 개폐밸브(10)의 볼(4)을 연마하는 연마장치는, 회전척(13)에 결합되고 볼(4)의 관통공(4b)에 끼워져 지지하는 지지편(11)이 구비된 고정척(12)과, 심압대(15)에 결합되고 볼(4)을 가압하여 지지하는 가압구(14)와, 볼(4) 표면을 연마하도록 구동모터(미도시됨)에 의해 회전되는 연마석(16)(일 예로서 그라인더, 다이아몬드숫돌 등을 말함)이 고정되는 왕복대(17)와, 왕복대(17)를 회전시키는 턴테이블(18)을 포함한다.As shown in FIG. 4, the polishing apparatus for polishing the ball 4 of the on-off valve 10 includes a support piece 11 coupled to the rotary chuck 13 and fitted into and supported by the through-hole 4b of the ball 4. A fixed chuck 12 provided therein, a pressure port 14 coupled to the tail stock 15 to press and support the ball 4, and a drive motor (not shown) to polish the surface of the ball 4; A carriage 17 on which the polished stone 16 to be rotated (namely, for example, grinder, diamond grindstone, etc.) is fixed, and a turntable 18 for rotating the carriage 17.

전술한 고정척(12) 및 심압대(15)에 의해 회전가능하게 지지되는 볼(4)이 회전척(13)에 의해 회전되므로, 왕복대(17)에 고정된 연마석(16)의 회전(구동모터에의해 회전됨)에 의해 볼(4) 표면을 연마하게 된다.Since the ball 4 rotatably supported by the above-described fixed chuck 12 and tailstock 15 is rotated by the rotary chuck 13, the rotation of the abrasive stone 16 fixed to the carriage 17 ( Rotated by a drive motor) to polish the surface of the ball 4.

이와 같이 텐테이블(18)을 따라 움직이는 왕복대(17)에 고정되어 구동모터에 의해 회전되는 연마석(16)에 의해 회전되는 볼(4)을 연마하게 되므로, 볼(4) 표면이 균일한 외경면을 갖도록 연마할 수 있고, 이로 인해 볼(4) 표면의 조도가 균일하게 된다.As such, the ball 4 rotated by the abrasive stone 16 fixed to the carriage 17 moving along the tentable 18 and rotated by the drive motor is polished, so that the surface of the ball 4 has a uniform outer diameter surface. It can be polished so that the surface roughness of the ball 4 is uniform.

한편, 도면에는 미도시되었으나, 볼(4)의 연마가공 중 또는 연마가공 후에 마찰으로 인해 자화되어 볼(4)에 잔류되는 자기를 탈자기(degaussing machine)와 볼(4)의 상호 접촉에 의해 탈자(볼에 잔류되는 자기를 유체 흐름을 간섭하지않도록 0.5?1gauss 정도를 유지함)시킬 수 있다. 이때 탈자기에 의해 볼(4)의 잔류자기를 탈자시키는 기술내용(잔류자기를 코일에서 발생되는 자계에 의해 탈자하는 것임) 자체는 당해분야에서 사용되는 것이므로 이들의 상세한 설명은 생략한다.On the other hand, although not shown in the drawings, the magnetization magnetized due to friction during or after grinding of the ball 4 and remains in the ball 4 by mutual contact between the degaussing machine and the ball 4 Demagnetization (keeping 0.5-1gauss of magnetism remaining in the ball so as not to interfere with fluid flow) can be achieved. At this time, the technical content of demagnetizing the residual magnetic of the ball (4) by demagnetizer (to demagnetize the residual magnetic by the magnetic field generated in the coil) itself is used in the art, so their detailed description is omitted.

전술한 바와 같은 본 발명의 실시예에 의한 용사코팅된 개폐밸브용 볼에 의하면, 가스관, 상수도 배관 등의 관로 내에 개폐가능하게 설치되는 개폐밸브의 볼 표면에 용사코팅층을 형성하여 볼 표면의 경도 및 내구성을 확보하며, 볼 및 밸브시트의 상호 접촉부위에서의 내마모성이 유지되므로 기밀을 유지할 수 있다. 또한 볼 연마시 연마로 인한 연마무늬가 생성되지않아 표면 가공정밀도를 높이고 볼에 잔류되는 자기(磁氣) 생성을 최소화하여 자기 잔류로 인해 볼을 부식시키거나, 유체 흐름을 간섭하는 것을 방지할 수 있다.According to the thermal spray coated on-off valve ball according to an embodiment of the present invention as described above, by forming a spray coating layer on the ball surface of the on-off valve that can be opened and closed in the pipeline, such as gas pipes, water supply pipes, etc. It ensures durability and maintains airtightness at the mutual contact portion of the ball and valve seat, thereby maintaining airtightness. In addition, the polishing pattern is not generated when grinding the ball, which increases the surface processing accuracy and minimizes the generation of magnetic residue remaining on the ball, thereby preventing the ball from corroding or interfering with the fluid flow. have.

1,2; 밸브몸체(valve body)
3; 밸브실
4; 볼(ball)
5,6; 밸브시트(valve sheet)
7; 손잡이
8; 밸브스템(valve stem)
9; 용사코팅층(thermal spray coating layer)
10; 개폐밸브1,2; Valve body
3; Valve chamber
4; Ball
5,6; Valve sheet
7; handle
8; Valve stem
9; Thermal spray coating layer
10; Valve

Claims (2)

내부에 유체가 흐르는 통로가 형성되는 밸브몸체와, 상기 밸브몸체 내에 회전가능하게 결합되며 손잡이의 조작에 따라 회전되어 유체 흐름을 단속하는 볼과, 상기 밸브몸체에 내설되어 상기 볼을 회전가능하게 지지하는 한 쌍의 밸브시트를 포함하는 개폐밸브용 볼에 있어서:
상기 볼의 표면에 표면경도 및 내구성을 증대시킬 수 있도록 플라즈마 용사에 의한 용사코팅층이 형성되는 것을 특징으로 하는 용사코팅된 개폐밸브용 볼.A valve body having a passage through which a fluid flows is formed, a ball rotatably coupled to the valve body, and rotated according to a manipulation of a handle to control the flow of fluid, and installed in the valve body to rotatably support the ball. In a ball valve for an on / off valve comprising a pair of valve seats:
Thermal spray coating ball for the thermal spray coating characterized in that the spray coating layer formed by the thermal spraying on the surface of the ball to increase the surface hardness and durability. 제1항에 있어서, 상기 용사코팅층은 100?1500㎛ 두께범위내로 형성되는 것을 특징으로 하는 용사코팅된 개폐밸브용 볼.According to claim 1, wherein the thermal spray coating layer is a spray coating ball valve for the spray coating, characterized in that formed in the thickness range of 100 ~ 1500㎛.
KR1020100105997A 2010-10-28 2010-10-28 Ball of ball-valve thermal spray coating KR20120044613A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108843810A (en) * 2017-04-12 2018-11-20 成立 Magnetic control multi gear valve ahead of gas stove
WO2019107590A1 (en) * 2017-11-28 2019-06-06 주식회사 대한시브이디 Ball having improved wear resistance and ball valve using same
KR20200128176A (en) * 2018-03-29 2020-11-11 빅톨릭 컴패니 Integrated control and check valve assembly for wet piping systems
KR102207652B1 (en) 2020-05-04 2021-01-26 한대용 Lubricative sintered metal seat
US11439855B2 (en) 2016-08-11 2022-09-13 Victaulic Company Modular valve assembly
US11517779B2 (en) 2017-01-06 2022-12-06 Victaulic Company Control valve assembly with test, drain and adjustable pressure relief valve
KR102481582B1 (en) * 2022-06-21 2022-12-27 (주)큐블락 Ball for ball valve
US11781658B2 (en) 2019-09-20 2023-10-10 Victaulic Company Ball valve assembly

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11439855B2 (en) 2016-08-11 2022-09-13 Victaulic Company Modular valve assembly
US11826591B2 (en) 2016-08-11 2023-11-28 Victaulic Company Modular valve assembly
US11517779B2 (en) 2017-01-06 2022-12-06 Victaulic Company Control valve assembly with test, drain and adjustable pressure relief valve
CN108843810A (en) * 2017-04-12 2018-11-20 成立 Magnetic control multi gear valve ahead of gas stove
WO2019107590A1 (en) * 2017-11-28 2019-06-06 주식회사 대한시브이디 Ball having improved wear resistance and ball valve using same
KR20200128176A (en) * 2018-03-29 2020-11-11 빅톨릭 컴패니 Integrated control and check valve assembly for wet piping systems
CN112219050A (en) * 2018-03-29 2021-01-12 维特利公司 Valve assembly with integrated control and check functions for wet-type spray fire extinguishing system
US11402028B2 (en) 2018-03-29 2022-08-02 Victaulic Company Combination control and check valve assembly for a wet piping system
CN112219050B (en) * 2018-03-29 2022-12-30 维特利公司 Valve assembly with integrated control and check functions for wet-type spray fire-extinguishing system
US11781658B2 (en) 2019-09-20 2023-10-10 Victaulic Company Ball valve assembly
KR102207652B1 (en) 2020-05-04 2021-01-26 한대용 Lubricative sintered metal seat
KR102481582B1 (en) * 2022-06-21 2022-12-27 (주)큐블락 Ball for ball valve

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