KR100994798B1 - Built in type gas cutoff apparatus - Google Patents

Built in type gas cutoff apparatus Download PDF

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Publication number
KR100994798B1
KR100994798B1 KR1020100039487A KR20100039487A KR100994798B1 KR 100994798 B1 KR100994798 B1 KR 100994798B1 KR 1020100039487 A KR1020100039487 A KR 1020100039487A KR 20100039487 A KR20100039487 A KR 20100039487A KR 100994798 B1 KR100994798 B1 KR 100994798B1
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KR
South Korea
Prior art keywords
gas
fixed
built
magnet
blocking
Prior art date
Application number
KR1020100039487A
Other languages
Korean (ko)
Inventor
손재선
이기환
Original Assignee
주식회사 충남도시가스
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
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Priority to KR1020100039487A priority Critical patent/KR100994798B1/en
Application granted granted Critical
Publication of KR100994798B1 publication Critical patent/KR100994798B1/en

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    • 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
    • F16K1/00—Lift 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
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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
    • F16K35/06—Means to prevent accidental or unauthorised actuation using a removable actuating or locking member, e.g. a key
    • 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
    • F16K35/16—Means to prevent accidental or unauthorised actuation with locking member actuated by magnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations
    • F17D5/02—Preventing, monitoring, or locating loss

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The present invention relates to a built-in gas shutoff device with a built-in shutoff device to prevent large leakage of gas and illegal use of gas at the outlet side of the meter for detecting city gas usage.
The present invention is fixed to the outlet pipe of the gas meter with a hook nut, but is fixed to the lower portion of the pipe while being fixed to the inner side of the connection pipe is provided with a body installed, the barrier wall is installed on the upper side of the body When the blocking cap is moved to the upper portion, the blocking wall and the blocking cap are in close contact with each other to prevent gas leakage, and the fixing rod of the blocking cap is inserted into the support fixed to the inside of the body to be moved up and down, but the fixing rod is lower than the support. At the spring, the fastener is fixed to the lower side of the support, but the screw rod is screwed to the center of the fastener, and the circular blade is fixed to the upper side of the fastener on the upper part of the screw rod, but the iron piece is outward of the circular blade. By fixing.

Description

Built-in gas cutoff apparatus

The present invention relates to a built-in gas shutoff device with a built-in shutoff device to prevent large leakage of gas and illegal use of gas at the outlet side of the meter for detecting the usage of city gas.

Meter 1 for detecting the city gas usage is installed on the outdoor side of the gas pipe line as shown in Figure 1 to display the gas usage by the number of the display unit 2, the meter 1 This gas is supplied to the room through the connection pipe 3 and used as heating or cooking fuel.

Indoor gas pipes are connected to boilers or stoves. When moving or when people do not live, the gas pipes are blocked with a closing cap to prevent gas leakage. Open the cap and connect the gas equipment to the gas pipe.

However, applying and removing the closing cap should be done by a skilled person by applying to the city gas supplier. However, in some households, gas users may open the closing cap arbitrarily and attempt to connect the gas equipment. This is often caused by removing the cap and not acting with the closing cap. In this case, a gas leakage or a safety accident occurs due to an arbitrary operation of the valve.

Therefore, if a sudden gas leak occurs, such as when gas is not normally supplied at the rear of the gas meter and the gas pipe is not closed with a closing cap, the gas passage is forcibly blocked by moving the internal blocking cap with gas pressure. In order to prevent leakage, and when gas leakage occurs as described above, a fuse ball for preventing a gas leak by moving an internal blocking cap is installed between a gas meter and a gas device.

In addition, city gas must be used after paying a fee. However, when long-term payments are delinquent, the city gas company restricts the use of the gas by installing a sealing device on the gas pipe, but a city gas company official cannot check the sealing device frequently. In some cases, the gas users arbitrarily unseal the sealing device and connect the gas.

It solves the trouble of separately installing a fuse ball that blocks gas leakage when gas leaks to the gas pipe connected to the city gas meter, and seals it with a sealing device because it does not pay gas usage fee. This is to solve the problem of releasing the device and using gas.

The present invention is to move the blocking cap when the gas leakage to the inside of the connecting pipe of the gas meter to block the gas leakage while forcibly blocking the gas supply to move the blocking cap non-contact by using a magnet to block the gas supply It is made so that the outlet pipe of the gas meter is fixed with a hook nut, but is fixed to the lower portion of the connection pipe while being provided with a body having a cylindrical installation inside the connection pipe, the barrier wall to the upper side of the body When the blocking cap is moved to the upper portion of the blocking wall and the blocking cap is in close contact with the gas leakage is prevented, the fixing rod of the blocking cap is inserted into the support fixed to the inner side of the body to be moved up and down but the fixing rod The spring on the lower side of the earth, and fasten the fixture to the lower side of the support. The fastener is to secure a piece of iron to the outside of the ring-wing sikidoe secure the circular blade and the screw rod to be screwed in the center, the screw rod upper part.

Here, the iron piece fixed to the outside of the circular blade has a form surrounding the outer side of the connector tube and pulls the iron piece with a magnet key having a magnet built therein so that the rotation can be made in a non-contact manner. By rotating the left and right circular blades are fixed to the outside by turning the left and right while the screw rod is inserted into the fixture to move up and down to rotate the blade to push the blocking cap or push.

The present invention is to move the shut-off cap automatically to block the gas leakage in the case of the leakage of gas from the indoor side to the outlet pipe of the gas meter for detecting the use of the city gas while the magnet of the connection pipe By moving the blocking cap installed on the inside to forcibly cut off the gas supply, it is not possible to unseal the gas and use the gas freely unless the gas meter is damaged from the outside.

In particular, since the sealing operation of the gas is made by using a magnet from the outside, the sealing can not be released without holding the magnetic key to solve the problem of illegal release.

1 is a perspective view of a gas meter
Figure 2 is a gas meter connector perspective view
3 is an assembled cross-sectional view of the present invention.
4 is an exploded perspective view of the present invention
5 is a cross-sectional view of the installation state of the present invention
Figure 6 is a cross-sectional view of the gas leak state of the present invention
7 is a plan view of the magnet key inserted state of the present invention
8 is a cross-sectional view of the magnetic key of the present invention inserted
9 is a cross-sectional view of the seal made of a magnetic key of the present invention
10 is a front view of a circular wing of the present invention
11 is a cross-sectional view of a circular wing embodiment of the present invention
12 is a perspective view of a magnetic key embodiment of the present invention
Figure 13 is a cross-sectional view of a magnetic key embodiment of the present invention
Figure 14 is a plan view of the magnet key of the present invention inserted into the outer tube
15 is a plan view showing a state in which the magnetic key of the present invention is opened and narrowed

The present invention is to install a gas shutoff device to automatically seal the gas leakage when the gas leaks into the inner side of the connecting pipe coupled to the outlet side of the gas meter to detect the amount of gas used by using a magnet in a non-contact manner By doing so, the trouble of installing a fuse ball to prevent gas leakage and the problem of illegally releasing the gas seal are solved.

In the present invention, the gas meter is connected to the indoor gas pipe through the connection pipe connected to the outlet side after receiving the gas is metered to supply the gas to the gas equipment, but when the gas leaks into the inside of the connection pipe When gas pressure is required by blocking the gas supply by moving to pressure, the sealing cap is made to block the gas supply by moving the blocking cap to the upper portion in a non-contact manner to fix the gas supply.

The present invention is installed inside the outlet pipe of the gas meter, so that the position is not confirmed from the outside, as well as to be sealed in a non-contact manner using a magnet, the user can not be unlawfully sealed to improve the reliability of the gas seal On the other hand, it prevents gas accidents by automatically shutting off the gas supply when a gas leak occurs.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a gas meter (1) that is installed outdoors to detect the amount of city gas, the gas meter (1) to prevent gas leakage while the gas seal is made but the gas seal is a non-contact type using a magnetic field of the magnet To be done.

The present invention is built in the gas meter (1) to automatically block the gas leakage to the inside of the outlet side of the connection pipe (3) while the built-in blocking device to make the gas seal.

The blocking device of the present invention has a cylindrical body and is provided with a body 10 is fitted into the inside of the connecting pipe (3), the body 10 has a blocking wall 11 protrudes in the upper side while the lower side The fixing jaw 12 is formed to the outside, and the fixing rod 31 of the blocking cap 30 is fitted to the inside of the body 10 by fixing the support 20 so that the support 20 is outside. The gas is passed through, and the upper portion of the blocking cap 30 is in close contact with the blocking wall 11 while extrapolating the spring 32 to the outside of the fixing rod 31 from the lower side of the support 20, Fixing the fixture 40 to the lower side of the support 20, the screw rod 60 is screwed into the center of the fixture 40, while allowing the gas to pass through the outside of the fixture 40, the fixture ( The circular blade 50 is fixed to the upper portion of the screw rod 60 protruding to the upper portion of the 40 while iron outward of the circular blade 50 70 is configured by having a fixed inserted.

The body 10 of the present invention has a cylindrical shape and forms a blocking wall 11 protruding inwardly on the upper side, and a fixing jaw 12 protruding outwardly on the lower side, and the body 10 is a connection pipe. When the fitting jaw 12 is fitted between the lower side of the connecting pipe 3 and the protruding jaw 1a when the inner side of the protruding jaw 1a is fitted into the inside of the 3, the connecting pipe 3 is compressed. The hook nut 4 is tightened to fix the body 10.

That is, the connection pipe (3) is to raise the lower side on the protruding jaw (1a) of the meter (1), and then the fixing of the connection pipe (3) by tightening the hook nut (4) with the packing (5) In the present invention, the fixing jaw 12 of the body 10 is sandwiched between the protruding jaw 1a and the connection pipe 3, and then fixed by the hook nut 4 to make the body ( 10 is maintained without being separated from the inside of the connection pipe 3, the case in which the gas leaks through the outside of the body 10 by fitting the packing (10a) to the outside of the body (10) Get rid of it.

In the present invention, the reason why the body 10 is fixed while being pressed on the lower side of the connecting pipe 3 is to prevent the body 10 from moving inside the connecting pipe 3 by gas pressure. It is known to fix the connecting pipe 3 by screwing the hook nut 4 on the outside of the connecting pipe 3 to the outside of the protruding jaw 1a.

The blocking wall 11 of the present invention is formed to protrude inward from the upper side of the body 10, the lower side of the blocking wall 11 is in close contact with the upper side of the blocking cap 30 to prevent gas leakage, The lower side of the blocking wall 11 is to have a rounded form to be in close contact with the upper portion of the blocking cap 30, the upper portion of the blocking cap 30 to have a rounded shape, such as mushrooms, the blocking cap ( If the 30 rises, the upper portion of the blocking cap 30 and the lower portion of the blocking wall 11 meet to prevent gas leakage.

In the present invention, the supporter 20 and the fixture 40 are fixed to the inside of the body 10 up and down, respectively, but the supporter 20 allows the gas to flow outward while at the center of the blocking cap 30. Fixing rod 31 fixed to the lower center is inserted to move up and down, and screw rod 60 is screwed into the fixture 40, so that the screw rod 60 is rotated, the tip of the screw rod 60 This moves to the upper or lower to move the blocking cap 30 up and down with a circular blade (50).

Spring 32 is extrapolated to the lower side of the support 20 to the fixing rod 31 fitted to the support 20 of the present invention, but usually the blocking cap 30 by the elastic force of the spring 32 as shown in FIG. In order to keep the spring 32 in contact with the support 20, the expanded state, and the gas pressure is increased only when the gas leaks to push the blocking cap 30 to the upper portion, the spring 32 only Since the compression cap 30 is in close contact with the lower portion of the blocking wall 11 while being compressed, gas leakage is blocked.

That is, since the abrupt pressure change does not occur when the gas is normally combusted in the gas machine, the blocking cap 30 maintains the lowered state by the tension of the spring 32 so that there is no problem in gas supply. When a sudden gas leak occurs due to loosening of a pipe, a gas machine, or a closing cap, the inner pressure of the connecting pipe 3 is lowered, and the blocking cap 30 is a spring 32 as shown in FIG. By crimping and rising), the blocking cap 30 is in close contact with the blocking wall 11, whereby the gas supply is blocked.

In this way, when the blocking cap 30 is in close contact with the blocking wall 11, a gas leak occurs and a large gas pressure difference is generated. When the cause of the gas leak is removed by repair or maintenance, the connection pipe Since the difference in the internal gas pressure of (3) disappears, the blocking cap 30 is moved downward by the restoring force of the spring 32, whereby the gas supply is normally performed through the blocking wall 30.

Therefore, the present invention is to provide a normal gas supply using the blocking cap 30, but when a gas leak occurs to block the gas wall by blocking the blocking wall 11 with the blocking cap 30.

Meanwhile, the present invention allows the screw rod 60 to be raised or lowered by rotating the screw rod 60 fitted to the fixture 40 fixed to the inner side of the body 10, and is sealed to prevent gas supply. While raising the rod 60 as shown in FIG. 8 while the circular blade 50 is located on the upper side of the fastener 40 and fixed to the tip of the screw rod 60 pushes the fixing rod 31 of the blocking cap 30 Ascending, forcibly compresses the spring 32 and the blocking cap 30 blocks the blocking wall 11 to seal the gas.

Screw rod 60 of the present invention to install a circular blade 50 from the upper side of the fixture 40, so that the gas flow through the circular blade 50 is made smoothly, formed in a circular shape to the inside of the body 10 In the up and down movement can be made freely.

In the present invention, the circular blade 50 may be installed in a very circular shape or a half moon symmetrically on both sides, so that the screw rod 60 screwed to the fixture 40 rotates when the circular blade 50 is rotated. When the screw rod 60 is rotated, the circular blade 50 moves up and down, and the gas is allowed to flow normally through the hole formed in the circular blade 50.

In the circular blade 50 of the present invention to form a coupling groove 51 to the outside, the coupling groove 51 is fitted to the iron piece 70, so that the iron piece 70 is fixed by the rotary blade 50 and the adhesive, etc. On the other hand, the iron piece 70 is to have a circular or semi-circular in the shape of the circular wing 50, it is fitted into the coupling groove 51 formed on the outside of the circular wing 50 to be fixed.

And in the present invention, when the coupling protrusion 52 formed to protrude inside the coupling groove 51 of the circular blade 50 is fitted to the iron piece 70 is separated from the circular blade 50 only the iron piece 70 is not rotated Without, the circular blade 50 and the iron piece 70 is rotated at the same time.

In the present invention, the rotation is made by using the magnet 81 on the outside of the connection pipe 3 without touching the circular blade 50, hands or tools, in the present invention, the connection pipe 3 and the hook nut ( 4) The back is made of brass that does not adhere to the magnet, and the body 10, the blocking cap 30, and the support 20, the fastener 40, and the circular wing 50 are made of plastic to the magnet. It is manufactured so as not to stick, but only the iron piece 70 is made of a magnetic material to react with the magnetic field of the magnet 81 so that the iron piece 70 is pulled toward the magnet (81).

The present invention has the form of a circular ring and one side is cut so that the rotation is made around the hinge (82) while having a magnet key (80) with a magnet 81 inward to the outside of the connector (3) When the magnet key 80 is rotated in the state in which the magnet key 80 is inserted in the state, the circular blade 50 in which the iron piece 70 is fixed by the pulling force of the magnet 81 is rotated, and the circular blade 50 of the Since the rotation of the screw rod 60 is made according to the rotation, the circular blade 80 can be vertically moved by rotating the screw rod 60 using the magnet key 80.

The magnet key 80 has a form of a circular ring is to be spread around the hinge 82 installed on one side or to form a circular shape, it is fixed by inserting a magnet 81 in the plastic case 83 When the magnet key 80 is opened to one side and opened to the outside of the connecting pipe 3 and gradually turned in a state of maintaining a circular ring, the magnet 81 is pulled from the inside of the connecting pipe 3. Since the iron piece 70 is rotated, the circular blade 50 is moved up and down while eventually raising or lowering the screw rod 60.

Here, the magnet key 80 rotates the circular blade 50 by applying a pulling force to the iron piece 70 fixed to the outside of the circular blade 50 by using the magnet 81 inside. This is done.

The magnet key 80 provides a pulling force in the form of wrapping around the outside of the connector 3 regardless of the shape of the magnet 81 inserted therein or the shape of the magnet key 80 itself, thereby pulling the circular blade 50. It should be able to rotate.

When the circular rod 50 is raised by rotating the screw rod 60 by using the magnet key 80, the circular blade 50 pushes the fixing rod 31 upward to forcibly press the spring 32 to shut off. Gas blocking is achieved by moving the cap 30 upward so that the cap 30 is in close contact with the blocking wall 11.

Since the gas supply is cut off using the magnet key 80 as described above, no one can resume the gas supply without using the magnet key 80. This can be useful when shutting down the supply.

In order to release the seal in the state of gas sealing, the magnet key 80 is formed to surround the outside of the connecting pipe 3, and then the magnet key 80 is rotated in the direction of loosening the screw, thereby rotating the circular blade 50. It is lowered by the screw coupling of the screw rod 60, and because of this the circular blade 50 is unable to press the fixing rod 31 of the blocking cap 30, the blocking cap 30 by the restoring force of the spring (32) The gas supply will be normal as it is returned.

Therefore, when the gas fee is not paid, the gas is sealed using the magnet key 80, and the sealed state is not exposed to the outside, and even if the seal is illegally released, the seal could not be released.

1: meter 3: connector
10: body 11: barrier wall
20: support 30: blocking cap
31: fixed rod 32: spring
40: fixture 50: rotary blade
60: screw rod 70: iron piece
80: magnet key 81: magnet

Claims (6)

It is inserted into the connecting pipe (3) of the gas meter (1) and is provided with a cylindrical body (10) formed by protruding the blocking wall 11 inward on the upper side,
Fixing the support 20 and the fixture 40 up and down inside the body 10 to allow the gas to be discharged through the holes formed in the fixture 40 and the support 20,
Insert the fixing rod 31 fixed to the blocking cap 30 in the center of the support 20 to move up and down, but the blocking cap 30 is in close contact with the blocking wall 11 from the upper side,
Extrapolating the spring 32 to the outside of the fixing rod 31 in the lower side of the support 20,
The screw rod 60 is screwed to the center of the fixture 40 fixed to the lower side of the support 20, but the circular blade 50 is fixed to the upper side of the screw rod 60 while the circular blade 50 ) Is positioned above the fixture 40,
Fixing the iron piece 70 on the outside of the circular blade 50,
The magnet key 80 is inserted into the outer side of the connecting pipe 3, but the magnet key 80 has a magnet 81 embedded therein so that the iron piece 70 can be pulled by the magnet 81. Built-in gas shutoff device, characterized in that configured to rotate the circular blade (50). The method of claim 1, wherein the cylindrical body 10 is fixed to the body 10 in a state in which the fixing jaw 12 is fitted to the lower side of the connecting pipe 3 by forming a fixing jaw 12 protruding from the lower side to the outside. And a packing (10a) is inserted between the outer side of the body (10) and the connection pipe (3). According to claim 1, The blocking cap 30 is inserted into the support 20 is moved up and down when the contact with the blocking wall 11 is moved to the top and the spring 32 is compressed and raised, the blocking cap 30 ) Is built up by the gas pressure is rapidly released when the gas leaks close to the blocking wall (11), when the gas leakage is cut off by the restoring force of the spring (32). According to claim 1, the screw rod 60 is screwed to the fastener 40 is moved up and down by screwing when the rotary blade 50 is rotated, when the screw rod 60 is moved to the upper rotary blade ( Built-in gas shutoff device, characterized in that 50 to push up the fixing rod 31 of the blocking cap (30) to the top. According to claim 1, wherein the rotary blades 50 to form a coupling groove 51 to the outside to allow the iron piece 70 is fitted, the iron piece 70 is characterized in that the fixing blades and the rotating blades 50 and the adhesive Built-in gas shutoff device. According to claim 1, wherein the magnet key (80) fitted to the outside of the connector (3) has a circular ring shape and is opened around the hinge 82, the magnet key 80 is a built-in magnet 81 Built-in gas shutoff device, characterized in that the magnetic field to hold the iron piece 70 is magnetically rotated by a non-contact.
KR1020100039487A 2010-04-28 2010-04-28 Built in type gas cutoff apparatus KR100994798B1 (en)

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Application Number Priority Date Filing Date Title
KR1020100039487A KR100994798B1 (en) 2010-04-28 2010-04-28 Built in type gas cutoff apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100039487A KR100994798B1 (en) 2010-04-28 2010-04-28 Built in type gas cutoff apparatus

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KR100994798B1 true KR100994798B1 (en) 2010-11-17

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KR1020100039487A KR100994798B1 (en) 2010-04-28 2010-04-28 Built in type gas cutoff apparatus

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101622980B1 (en) * 2014-06-30 2016-05-20 서울도시가스 주식회사 Apparatus for prevent inflow of water into gas pipe
CN112253825A (en) * 2020-10-22 2021-01-22 华光阀门有限公司 Exhaust valve capable of improving exhaust efficiency
CN113989986A (en) * 2021-10-27 2022-01-28 深圳市捷先数码科技股份有限公司 Mechanical key device for gear-driven fluid meter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116673U (en) 1982-12-20 1984-08-07 陸田　外一 constant flow valve
KR200276229Y1 (en) 2002-03-05 2002-05-18 조연환 Safety apparatus of gas line

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59116673U (en) 1982-12-20 1984-08-07 陸田　外一 constant flow valve
KR200276229Y1 (en) 2002-03-05 2002-05-18 조연환 Safety apparatus of gas line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101622980B1 (en) * 2014-06-30 2016-05-20 서울도시가스 주식회사 Apparatus for prevent inflow of water into gas pipe
CN112253825A (en) * 2020-10-22 2021-01-22 华光阀门有限公司 Exhaust valve capable of improving exhaust efficiency
CN112253825B (en) * 2020-10-22 2022-05-17 华光阀门有限公司 Exhaust valve capable of improving exhaust efficiency
CN113989986A (en) * 2021-10-27 2022-01-28 深圳市捷先数码科技股份有限公司 Mechanical key device for gear-driven fluid meter

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