KR200342572Y1 - Ball valve lock - Google Patents

Ball valve lock Download PDF

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Publication number
KR200342572Y1
KR200342572Y1 KR20-2003-0036282U KR20030036282U KR200342572Y1 KR 200342572 Y1 KR200342572 Y1 KR 200342572Y1 KR 20030036282 U KR20030036282 U KR 20030036282U KR 200342572 Y1 KR200342572 Y1 KR 200342572Y1
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KR
South Korea
Prior art keywords
fixing
ball
opening
screw rod
spool line
Prior art date
Application number
KR20-2003-0036282U
Other languages
Korean (ko)
Inventor
김판곤
Original Assignee
김판곤
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Priority to KR20-2003-0036282U priority Critical patent/KR200342572Y1/en
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Publication of KR200342572Y1 publication Critical patent/KR200342572Y1/en

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Classifications

    • 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
    • F16K35/00—Means to prevent accidental or unauthorised actuation
    • F16K35/10—Means to prevent accidental or unauthorised actuation with locking caps or locking bars
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K31/602—Pivoting levers, e.g. single-sided
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)

Abstract

본 고안은 볼밸브의 잠금장치에 관한 것으로 보다 구체적인 것은 밸브몸체(1)의 통로(1a)에 구멍(2a)이 형성된 개폐용 볼(2)이 장치되고 볼이 장치된 상측으로 축잡이(1b)가 형성되어 그 속에 회전축(3)이 설치되어 회전축의 하단 연결부(3a)가 개폐용 볼(2)의 연결홈(2b)에 연결되고 회전축(3)의 상단(3b)은 축잡이 상단으로 돌출되어 작동레버(4)가 연결되어 고정너트(4a)가 체결되므로서 작동레버(4)를 회전시키면 개폐용 볼(2)이 일정각도로 회전되어 몸체(1)의 통로(1a)를 개폐하는 공지된 볼밸브에 있어서,The present invention relates to a locking device of a ball valve, and more specifically, an opening / closing ball 2 having a hole 2a formed in a passage 1a of the valve body 1 and having a ball holder 1b upwards. Is formed so that the rotating shaft (3) is installed therein, and the lower connecting portion (3a) of the rotating shaft is connected to the connecting groove (2b) of the opening and closing ball (2), and the upper end (3b) of the rotating shaft (3) is the upper end of the stem. When the operating lever 4 is rotated while the operating lever 4 is connected and the fixing nut 4a is fastened, the opening and closing ball 2 is rotated at an angle to open and close the passage 1a of the body 1. In the known ball valve,

축잡이 외측으로 횡안내관(6)을 형성하여 횡안내관 중심공(6a) 외측에 단턱(6b)을 만들어 외측으로 암나사(6c)를 형성하고 이곳에 내측에 고정돌기(7a)가 형성되고 그 고정돌기(7a) 부착부 둘레에 단턱(7b)이 형성되고 외주가 수나사(7c)로 되며 외측단에 돌출봉(7d)이 형성되어 그 외주에 길이방향으로 스풀라인(7e)이 형성된 고정나사봉(7)을 삽입하여 스풀라인(7e)이 형성된 외주에 환상의 간격(8)을 형성되게 지지링(9)을 끼워 지지링(9)의 외측에 형성된 요입홈(9a)에 횡안내관(6)의 입구 내측에 형성된 내향돌부(6e)가 결합되게 하고, 간격(8)을 통해 작동핸들(10)의 연결관(10a)이 투입되어 연결관이 작동나사봉의 스풀라인에 결합되도록 연결관의 내면에 고정나사봉의 스풀라인에 결합하는 스풀라인(10b)을 형성하고 고정나사봉(7)의 고정돌기(7a) 끝이 횡안내관(6)의 중심공(6a)을 통해 회전축(3)의 표면에 음각된 회전각도 제한용 요입홈(3c)의 일측에 형성된고정홈(3d)에 출입되게한 볼밸브의 잠금장치이다.A horizontal guide tube 6 is formed on the outside of the shaft holder to form a step 6b on the outside of the central hole 6a of the horizontal guide tube, thereby forming an external thread 6c, and a fixing protrusion 7a is formed therein. A step 7b is formed around the fixing protrusion 7a and the outer periphery is a male screw 7c, and a protruding rod 7d is formed at the outer end, and the spool line 7e is formed in the longitudinal direction at the outer periphery thereof. Inserting the threaded rod 7 into the outer periphery where the spool line 7e is formed, the support ring 9 is inserted so as to form a transverse guide in the recessed groove 9a formed on the outer side of the support ring 9. The inward protrusion 6e formed inside the inlet of the pipe 6 is coupled, and the connecting pipe 10a of the operating handle 10 is inserted through the gap 8 so that the connecting pipe is coupled to the spool line of the working screw rod. On the inner surface of the connecting pipe, a spool line 10b is formed to be coupled to the spool line of the fixing screw rod, and the end of the fixing protrusion 7a of the fixing screw rod 7 of the lateral guide tube 6 is formed. Deep-hole (6a) which is a lock on the ball valve to be accessible to the fixing groove (3d) formed at one side of the rotating shaft 3, the rotational angle restricting yaw iphom (3c) for engraving the surface of the via.

Description

볼밸브의 잠금장치{BALL VALVE LOCK}Ball Valve Locking Device {BALL VALVE LOCK}

본 고안은 볼밸브의 잠금장치에 관한 것으로 보다 구체적인 것은 밸브본체의 내부 통로에 통로를 개폐하는 개폐용 볼이 장치되고 상기 개폐용 볼에 연결되며 수동레버로 개폐용 볼을 작동시키는 회전축이 구비된 볼 밸브에 있어서 회전축의 표면에 고정홈을 형성하고 축잡이에 고정나사봉을 장치하여 축잡이에 설치된 고정나사봉을 특정의 작동핸들로 회전시켜서 고정나사봉의 고정돌기가 회전축의 고정홈에 투입되거나 이완되게 구성하므로서 볼밸브를 잠근상태에서 개폐작동을 임의로 할 수 없게한 잠금장치이다.The present invention relates to a locking device of the ball valve, and more specifically, the opening and closing ball for opening and closing the passage in the inner passage of the valve body is connected to the opening and closing ball and is provided with a rotating shaft for operating the opening and closing ball with a manual lever In the ball valve, a fixing groove is formed on the surface of the rotating shaft, and a fixing screw rod is mounted on the shaft holder to rotate the fixing screw rod installed on the shaft with a specific operation handle so that the fixing protrusion of the fixing screw rod is inserted into the fixing groove of the rotating shaft. It is a locking device that can not be opened and closed arbitrarily in a state in which the ball valve is locked because it is loosely configured.

종래의 볼 밸브 개폐장치는 몸체의 통로에 구멍이 있는 개폐용 볼을 장치하고 상기 개폐용 볼을 몸체에 형성한 축잡이 속으로 회전축을 설치하여 회전축의하단에 개폐용 볼에 결합하고 회전축의 상단은 축잡이 상측으로 노출시켜서 작동레버를 달아 작동레버를 회전시킴에 따라 개폐용 볼이 회전하여 통로를 개폐하도록 구성되어 있다.Conventional ball valve opening and closing device is equipped with opening and closing ball with a hole in the passage of the body and install the rotating shaft into the shaft holder formed the opening and closing ball in the body, coupled to the opening and closing ball at the bottom of the rotating shaft and the top of the rotating shaft It is configured to open and close the passage as the opening and closing ball rotates as the operating lever is rotated by operating the lever by exposing the shaft to the upper side.

따라서 이러한 볼밸브는 작동레버를 회전시킴에 따라 볼밸브가 피동되어 몸체의 통로를 열거나 닫기 때문에 개폐밸브를 폐쇄한 상태에서 작동레버를 열지 못하게 하는 장치가 없기 때문에 볼밸브를 잠근상태에서 임의로 개방하는 것을 방지할 수 없어 관계자가 지키지않으면 개폐밸브를 임의로 개방시킬 수 있고 이로인해 볼밸브의 무단 개방을 방지할 수 없는 결점이 있었다.Therefore, since the ball valve is driven by rotating the actuating lever to open or close the passage of the body, there is no device that prevents the actuating lever from being opened while the shut-off valve is closed. If it is not prevented by the concerned person, the on / off valve can be opened arbitrarily, which can prevent the unauthorized opening of the ball valve.

본 고안은 상기와 같은 불편을 해소시키기 위하여 볼밸브에 잠금장치를 설치하여 필요시 볼밸브를 달고 그 상태를 지속시킬 수 있게 한 것인데 이를 보다 상세히 도면에 의거 설명하면 다음과 같다.The present invention is to install the locking device to the ball valve in order to eliminate the inconvenience as described above to attach the ball valve if necessary to continue the state described in more detail as follows.

도 1은 본 고안의 사시도1 is a perspective view of the present invention

도 2는 본 고안의 분해사시도2 is an exploded perspective view of the present invention

도 3은 본 고안의 조립상태 단면도3 is a cross-sectional view of the assembled state of the present invention

도 4는 본 고안의 간격부 단면도이다.4 is a cross-sectional view of the spacing portion of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 밸브몸체 1a : 통로1: valve body 1a: passage

1b : 축잡이 2 : 개폐용볼1b: shaft holder 2: opening and closing ball

2a : 구멍 2b : 연결홈2a: hole 2b: connecting groove

3 : 회전축 3a : 연결부3: rotating shaft 3a: connecting portion

3b : 상단 3c,9a : 요입홈3b: top 3c, 9a: recessed groove

3d : 고정홈 4 : 작동레버3d: fixing groove 4: operating lever

4a : 고정너트 6 : 횡안내관4a: fixing nut 6: transverse guide tube

6a : 중심공 6b,7b : 단턱6a: center hole 6b, 7b: stepped

6c : 암나사 6e : 내향돌부6c: internal thread 6e: inward protrusion

7 : 고정나사봉 7a : 고정돌기7: fixing screw rod 7a: fixing protrusion

7c : 수나사 7d : 돌출봉7c: external thread 7d: protrusion bar

7e,10b : 스풀라인 8 : 간격7e, 10b: Spool line 8: Spacing

9 : 지지링 10 : 작동핸들9: support ring 10: operation handle

10a : 연결관10a: connector

밸브몸체(1)의 통로(1a)에 구멍(2a)이 형성된 개폐용 볼(2)이 장치되고 볼이 장치된 상측으로 축잡이(1b)가 형성되어 그 속에 회전축(3)이 설치되어 회전축의 하단 연결부(3a)가 개폐용 볼(2)의 연결홈(2b)에 연결되고 회전축(3)의 상단(3b)은 축잡이 상단으로 돌출되어 작동레버(4)가 연결되어 고정너트(4a)가 체결되므로서 작동레버(4)를 회전시키면 개폐용 볼(2)이 일정각도 회전되어 몸체(1)의 통로(1a)를 개폐하는 공지된 볼밸브에 있어서,An opening / closing ball 2 having a hole 2a formed in the passage 1a of the valve body 1 is provided, and a shaft 1b is formed on the upper side where the ball is installed, and a rotating shaft 3 is installed therein. Lower connection portion 3a is connected to the connection groove 2b of the opening and closing ball 2, and the upper end 3b of the rotary shaft 3 protrudes to the upper end of the shaft, and the operating lever 4 is connected to the fixing nut 4a. In the known ball valve for opening and closing the opening (2) of the ball (1) of the body (1) by rotating the operation lever (4) is rotated by a predetermined angle as being fastened,

축잡이 외측으로 횡안내관(6)을 형성하여 횡안내관 중심공(6a) 외측에단턱(6b)을 만들어 외측으로 암나사(6c)를 형성하고 이곳에 내측에 고정돌기(7a)가 형성되고 그 고정돌기(7a) 부착부 둘레에 단턱(7b)이 형성되고 외주가 수나사(7c)로 되며 외측단에 돌출봉(7d)이 형성되어 그 외주에 길이방향으로 스풀라인(7e)이 형성된 고정나사봉(7)을 삽입하여 스풀라인(7e)이 형성된 외주에 환상의 간격(8)이 형성되게 지지링(9)을 끼워 지지링(9)의 외측에 형성된 요입홈(9a)에 횡안내관(6)의 입구 내측에 형성된 내향돌부(6e)가 결합되게 하고, 간격(8)을 통해 작동핸들(10)의 연결관(10a)이 투입되어 연결관이 작동나사봉의 스풀라인에 결합되도록 연결관의 내면에 고정나사봉의 스풀라인에 결합하는 스풀라인(10b)을 형성하고 고정나사봉(7)의 고정돌기(7a) 끝이 횡안내관(6)의 중심공(6a)을 통해 회전축(3)의 표면에 음각된 회전각도 제한용 요입홈(3c)의 일측에 형성된 고정홈(3d)에 출입되게한 구성이다.A horizontal guide tube 6 is formed on the outside of the shaft holder to form a step 6b on the outside of the central hole 6a of the horizontal guide tube to form a female screw 6c on the outside, and a fixing protrusion 7a is formed therein. A step 7b is formed around the fixing protrusion 7a and the outer periphery is a male screw 7c, and a protruding rod 7d is formed at the outer end, and the spool line 7e is formed in the longitudinal direction at the outer periphery thereof. Insert the screw rod 7 and insert the support ring 9 so that the annular spacing 8 is formed on the outer circumference where the spool line 7e is formed, and then transversely guide the recessed groove 9a formed on the outside of the support ring 9. The inward protrusion 6e formed inside the inlet of the pipe 6 is coupled, and the connecting pipe 10a of the operating handle 10 is inserted through the gap 8 so that the connecting pipe is coupled to the spool line of the working screw rod. On the inner surface of the connecting pipe, a spool line 10b is formed to be coupled to the spool line of the fixing screw rod, and the end of the fixing protrusion 7a of the fixing screw rod 7 of the lateral guide tube 6 is formed. Deep-hole (6a) is configured to be accessible to a screw hole (3d) formed in one side of the rotating shaft 3, the rotational angle restricting yaw iphom (3c) for engraving the surface of the via.

이와같이 된 본 고안은 회전축(3)의 축잡이에 형성된 횡안내관(6)의 암나사(6c)에 나사결합된 고정나사봉(7)을 작동핸들(10)의 연결관(10a)으로 회전시켜서 고정돌기(7a) 끝이 외향하여 회전축(3)의 표면에 형성된 회전각도 제한용 요입홈(3c)에 위치되게 하면 작동레버로 회전축(3)을 돌려 개폐용 볼을 개방하여 회전시키거나 잠금쪽으로 회전시켜 통로를 개폐하게되며 볼밸브를 장기간 잠구어 놓아야할 때는 작동레버를 이용하여 개폐용 볼을 잠금쪽으로 돌려 개폐용 볼이 통로를 잠군상태에서 고정나사봉(7)을 작동핸들을 회전시켜 내향시키면 횡안내관(6)에서 작동나사봉(7)이 내측으로 더욱더 이동하여 고정나사봉(7)의 고정돌기(7a)가 회전축(3)의 고정홈(3d)에 투입되고 이 상태에서 작동핸들(10)을 분리하면 고정나사봉의 위치가 고정되어서 작동레버로 회전축을 회전시킬 수 없도록 잠구게 된다.The present invention thus achieved by rotating the fixing screw rod (7) screwed to the female screw (6c) of the transverse guide tube (6) formed on the shaft of the rotary shaft (3) by the connecting pipe (10a) of the operating handle (10) When the end of the fixing projection (7a) is located in the rotation angle limiting recess groove (3c) formed on the surface of the rotating shaft (3) outwards, turn the rotating shaft (3) with the operating lever to open the opening and closing ball to rotate or lock toward When the ball valve needs to be locked for a long time, turn the opening / closing ball to the lock side by using the operation lever to rotate the fixing screw rod (7) inward while the opening / closing ball locks the passage. When the operating screw rod (7) is moved further inward from the transverse guide tube (6), the fixing projection (7a) of the fixing screw rod (7) is put into the fixing groove (3d) of the rotating shaft (3) and operated in this state When the handle 10 is removed, the fixing screw rod is fixed in position and rotated by the operating lever. It will lock the shaft so that it cannot rotate.

특히, 본 고안의 고정나사봉(7)은 외측돌출봉(7d)의 표면에 스풀라인(7e)이 형성되어 있고 간격이 좁기때문에(약0.8mm이하) 간격(8)으로 투입되는 작동핸들(10)의 연결관(10a) 내면에 스풀라인과 같은 홈이 형성되어 있지 않으면 간격(8)으로 작동핸들의 연결관(10a)이 투입할 수가 없게되어 일반적인 렌치나 기구로 작동나사봉을 회전시킬 수 없게되고 이로인해 볼밸브 관리자만이 해당작동핸들을 갖이고 있으면서 필요시 고정나사봉(7)을 회전시킬 수 있게되는 효과를 얻을 수 있기때문에 볼밸브의 안전한 잠금장치를 제공할 수 있도록 되는 것이다.In particular, the fixed screw rod 7 of the present invention has a spool line (7e) formed on the surface of the outer protrusion rod (7d) and because the gap is narrow (about 0.8mm or less) operating handles are introduced into the interval (8) ( If there is no groove such as a spool line on the inner surface of the connecting pipe 10a of 10), the connecting pipe 10a of the operating handle cannot be inserted at intervals 8 so that the operating screw rod can be rotated with a general wrench or a mechanism. This makes it possible to provide a safe locking device for the ball valve because only the ball valve manager has the corresponding operation handle, and the fixing screw rod 7 can be rotated if necessary. .

Claims (1)

밸브몸체(1)의 통로(1a)에 구멍(2a)이 형성된 개폐용 볼(2)이 장치되고 볼이 장치된 상측으로 축잡이(1b)가 형성되어 그 속에 회전축(3)이 설치되어 회전축의 하단 연결부(3a)가 개폐용 볼(2)의 연결홈(2b)에 연결되고 회전축(3)의 상단(3b)은 축잡이 상단으로 돌출되어 작동레버(4)가 연결되어 고정너트(4a)가 체결되므로서 작동레버(4)를 회전시키면 개폐용 볼(2)이 일정각도 회전되어 몸체(1)의 통로(1a)를 개폐하는 공지된 볼밸브에 있어서,An opening / closing ball 2 having a hole 2a formed in the passage 1a of the valve body 1 is provided, and a shaft 1b is formed on the upper side where the ball is installed, and a rotating shaft 3 is installed therein. Lower connection portion 3a is connected to the connection groove 2b of the opening and closing ball 2, and the upper end 3b of the rotary shaft 3 protrudes to the upper end of the shaft, and the operating lever 4 is connected to the fixing nut 4a. In the known ball valve for opening and closing the opening (2) of the ball (1) of the body (1) by rotating the operation lever (4) is rotated by a predetermined angle as being fastened, 축잡이 외측으로 횡안내관(6)을 형성하여 횡안내관 중심공(6a) 외측에 단턱(6b)을 만들어 외측으로 암나사(6c)를 형성하고 이곳에 내측에 고정돌기(7a)가 형성되고 그 고정돌기(7a) 부착부 둘레에 단턱(7b)이 형성되고 외주가 수나사(7c)로 되며 외측단에 돌출봉(7d)이 형성되어 그 외주에 길이방향으로 스풀라인(7e)이 형성된 고정나사봉(7)을 삽입하여 스풀라인(7e)이 형성된 외주에 환상의 간격(8)이 형성되게 지지링(9)을 끼워 지지링(9)의 외측에 형성된 요입홈(9a)에 횡안내관(6)의 입구 내측에 형성된 내향돌부(6e)가 결합되게 하고, 간격(8)을 통해 작동핸들(10)의 연결관(10a)이 투입되어 연결관이 작동나사봉의 스풀라인에 결합되도록 연결관의 내면에 고정나사봉의 스풀라인에 결합하는 스풀라인(10b)을 형성하고 고정나사봉(7)의 고정돌기(7a) 끝이 횡안내관(6)의 중심공(6a)을 통해 회전축(3)의 표면에 음각된 회전각도 제한용 요입홈(3c)의 일측에 형성된 고정홈(3d)에 출입되게 구성한 볼밸브의 잠금장치.A horizontal guide tube 6 is formed on the outside of the shaft holder to form a step 6b on the outside of the central hole 6a of the horizontal guide tube, thereby forming an external thread 6c, and a fixing protrusion 7a is formed therein. A step 7b is formed around the fixing protrusion 7a and the outer periphery is a male screw 7c, and a protruding rod 7d is formed at the outer end, and the spool line 7e is formed in the longitudinal direction at the outer periphery thereof. Insert the screw rod 7 and insert the support ring 9 so that the annular spacing 8 is formed on the outer circumference where the spool line 7e is formed, and then transversely guide the recessed groove 9a formed on the outside of the support ring 9. The inward protrusion 6e formed inside the inlet of the pipe 6 is coupled, and the connecting pipe 10a of the operating handle 10 is inserted through the gap 8 so that the connecting pipe is coupled to the spool line of the working screw rod. On the inner surface of the connecting pipe, a spool line 10b is formed to be coupled to the spool line of the fixing screw rod, and the end of the fixing protrusion 7a of the fixing screw rod 7 of the lateral guide tube 6 is formed. Deep-hole (6a) fixing groove (3d) the ball locking device of the valve is configured to be in and out is formed at one side of the rotating shaft 3, the rotational angle restricting yaw iphom (3c) for engraving the surface of the via.
KR20-2003-0036282U 2003-11-20 2003-11-20 Ball valve lock KR200342572Y1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101003850B1 (en) 2010-04-29 2010-12-23 (주)케이.브이.에이. Switch locking apparatus of actuator for operating valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101003850B1 (en) 2010-04-29 2010-12-23 (주)케이.브이.에이. Switch locking apparatus of actuator for operating valve

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