KR101776397B1 - Press gauge for protecive valve device - Google Patents

Press gauge for protecive valve device Download PDF

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Publication number
KR101776397B1
KR101776397B1 KR1020150127873A KR20150127873A KR101776397B1 KR 101776397 B1 KR101776397 B1 KR 101776397B1 KR 1020150127873 A KR1020150127873 A KR 1020150127873A KR 20150127873 A KR20150127873 A KR 20150127873A KR 101776397 B1 KR101776397 B1 KR 101776397B1
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KR
South Korea
Prior art keywords
main body
pressure
path
pressure gauge
inflow
Prior art date
Application number
KR1020150127873A
Other languages
Korean (ko)
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KR20170030365A (en
Inventor
고승용
Original Assignee
고승용
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Publication date
Application filed by 고승용 filed Critical 고승용
Priority to KR1020150127873A priority Critical patent/KR101776397B1/en
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Application granted granted Critical
Publication of KR101776397B1 publication Critical patent/KR101776397B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
    • G01L19/06—Means for preventing overload or deleterious influence of the measured medium on the measuring device or vice versa
    • G01L19/0618—Overload protection
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F16K47/023—Means in valves for absorbing fluid energy for preventing water-hammer or noise for preventing water-hammer, e.g. damping of the valve movement
    • 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
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/04—Devices damping pulsations or vibrations in fluids
    • F16L55/045—Devices damping pulsations or vibrations in fluids specially adapted to prevent or minimise the effects of water hammer
    • F16L55/05—Buffers therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L7/00—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements
    • G01L7/02—Measuring the steady or quasi-steady pressure of a fluid or a fluent solid material by mechanical or fluid pressure-sensitive elements in the form of elastically-deformable gauges

Abstract

The present invention relates to a valve device for protecting a pressure gauge, and more particularly, to a valve device for protecting a pressure gauge from being damaged by a variable pressure (shock wave), which is used to measure a pressure of a hole, A pressure gauge protection valve device capable of reducing the cost of equipment can be connected to one side of the outer circumference of the conduit through which the air and the fluid flow, and a supply passage for receiving the pressure of the inside of the conduit is formed in the lower portion. And a storage portion connected to the inflow passage and the supply passage is formed at one end of the inflow passage, and a main body having an inlet And an adjusting tube portion having an inner space portion and a space portion of the adjusting tube portion, An elastic spring for urging the pressing plate against one side of the pressing plate, and a rod portion which is fastened to one end of the pressing plate to be inserted into the inflow path of the main body is formed on one side of the pressing plate, And a pressure gauge connected to the main body of the main body and measuring the pressure of the air introduced into the main body. The main body of the main body includes a head portion located at a storage portion of the main body, to be.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure gauge protection valve device,

The present invention relates to a valve device for protecting a pressure gauge, and more particularly, to a valve device for protecting a pressure gauge from being damaged by a variable pressure (shock wave), which is used to measure a pressure of a hole, And more particularly, to a valve device for protecting a pressure gauge capable of reducing equipment cost.

Generally, a valve is a general term for a device having a movable mechanism capable of opening and closing a passage to pass, block, or control fluid, and is used for piping.

The name is divided into gate valve, grooved valve, check valve, etc., and the type is again connected end face (screw type, flange type, weld type, etc.), valve body (globe type, stream type, Y type, , Valve discs (solid discs, split discs, etc.), valve disc guides (top guide type), valve discs (double disc type, single port type, etc.), valve body and lid connection (screw bonnet type, bolt bonnet type, , Valve seat (single valve type, internal screw type), structure (bellows type, direct acting type, etc.) and equipment (vertical installation, horizontal installation, etc.) .

On the other hand, a valve having a pressure gauge for periodically checking the pressure of the fluid flow is generally used in such a valve.

In order to ensure various directions of the pressure gauge for periodically checking the pressure, the flow of the needle 110 and the graduation 120 indicated by the needle 110 by an internal pressure reaction, as shown in Figs. 1A and 1B, And a pressure tube 220 communicating with the inside of the housing 100 is formed in the inside of the housing 100. The pressure gauge 210 is formed on the outer circumferential surface of the housing 100, A connector 200a is vertically protruded downward and a screw 210 is formed on an outer circumferential surface of the housing 100 and a pressure tube 220 communicating with the inside of the housing 100 is formed. The second connector 200b is horizontally projected rearward and is vertically installed at the upper part of the pipe by using the screw part 210 formed on the outer circumferential surface of the first contactor 200a to measure the pressure of gas or fluid flowing in the pipe And have.

As described above, the first connector and the second connector are formed on the pressure gauge, and the pressure of the gas or fluid flowing through the channel can be measured by being coupled to the pipe in various forms. However, since the pressure of the flowing fluid changes abnormally, water hammer occurs, the shock wave due to the pressure fluctuation damages the pressure gauge, and the gauge scale returns to '0', so that the operation is not performed again.

Korea Utility Model Registration Application No. 2014-0011946.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a pressure gauge protection valve device capable of preventing breakage by variable pressure (shock wave) generated in a pipeline, The purpose is to provide.

To achieve the above object, according to the present invention, there is provided an air-conditioner comprising: a supply path formed at a lower portion thereof, which is coupled to one side of an outer circumference of a duct through which air and a fluid flow, And a central portion of the main body is formed with an inflow path connecting to the supply path and a storage portion connected to the inflow path and the supply path is connected to one end of the inflow path, And a pressure plate provided on a surface portion connected to the inflow path of the main body and an elastic spring for pressing the pressure plate against one side of the pressure plate, And the other end of the rod portion is located in the storage portion of the main body And a pressure gauge for measuring a pressure of the air flowing into the delivery path, the pressure gauge valve being connected to the control valve, ≪ / RTI >

In addition, a regulating pressure plate is provided on one side of the inside of the space portion of the regulating tube portion, and a regulating pressure plate is provided to adjust the elasticity ratio of the elastic spring, which is formed by threading, .

In addition, the adjusting tube portion is formed with a coupling rod portion protruding from one side of the adjusting tube portion so as to be inserted into the inflow groove of the main body, an inlet hole communicating with the space portion of the adjusting tube portion is formed at the center of the coupling rod portion, And a guide portion connected to the inlet pipe of the control pipe portion is formed at one end of the coupling rod portion of the main body so that the rod portion of the control portion is inserted into the inlet pipe of the control pipe portion.

In addition, a sealing cap may be further provided on one side surface of the storage unit of the main body, and a sealing stopper may be formed to have a through hole penetrating to the outside and being detachably coupled to the through hole to seal the storage unit of the main body.

A second pressure gauge is installed at one side of the storage unit of the main body to measure the variable pore pressure. The second pressure gauge is connected to one end of the induction delivery path to measure the variable pore pressure .

As described above, the valve apparatus for protecting a pressure gauge according to the present invention prevents a pressure gauge for measuring a pressure of a hole, which is fed through a pipe, from being damaged by a variable pressure (shock wave) Can be reduced.

Further, by providing the second pressure gauge in the main body of the present invention, it is possible to measure static pressure and variable pressure of air or fluid flowing in the pipeline.

Figures 1A and 1B are perspective views showing a conventional pressure gauge and pipeline.
2 is an exploded perspective view showing a valve apparatus for protecting a pressure gauge according to the present invention.
3 is an assembled sectional view showing a valve apparatus for protecting a pressure gauge according to the present invention.
4 is another embodiment showing a valve apparatus for protecting a pressure gauge according to the present invention.
5 shows another embodiment of the adjustment tube of the present invention.
Figures 6a and 6b show an operational embodiment of Figure 5;
7 is another embodiment of a valve apparatus for protecting a pressure gauge according to the present invention.
8A and 8B show another embodiment of the valve apparatus for protecting a pressure gauge according to the present invention.
9A and 9B are operational views showing a valve apparatus for protecting a pressure gauge according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

2 to 3, the valve apparatus 1 for protecting a pressure gauge according to the present invention comprises a supply passage 12, which is tightly coupled to one side of the outer circumference of a conduit through which air and fluid flow, A feed path 14 for feeding the inflow pressure is formed in the upper part and an inflow path 15 connected to the feed path 12 is formed in the center part and at one end of the inflow path 15, The main body 10 has a main body 10 formed with a storage part 16 connected to the main body 10 and the supply path 12 and a main body 10 connected to an inlet path 15 of the main body 10, The control tube portion 20 having the space portion 22 and the space portion 22 of the control tube portion 20 are provided with the pressure plate 30 provided on the surface portion connected to the inflow passage 15 of the main body 10, 30) is provided at one side thereof with an elastic spring (40) for bringing the pressure plate (30) into close contact with the pressure plate (30) A rod portion 52 to be inserted into the inflow path 15 of the main body 10 is formed and the other end of the rod portion 52 is connected to a head portion And a sealing part 56 is provided on the outer periphery of both ends of the rod part 52. The control part 50 is fastened to the delivery path 14 of the main body 10 and is connected to the delivery path 14 And a pressure gauge 60 for measuring the inflow pressure.

The main body 10 is connected to a pressure gauge 60 for measuring the pressure of the main body 10 to send the pressure of the air and the fluid flowing in the inside of the pipe to the pressure gauge 60 to measure the pore pressure inside the pipe, The pressure gauge 60 can be detachably attached to the delivery path 14 of the main body 10 so that the pressure gauge 60 can be easily replaced when the pressure gauge 60 is broken. It is preferable that the lower part is also detachably attached to the pipeline.

The air and fluid pressure flowing into the pipeline are introduced into the supply path 12 of the main body 10 and connected to the pipeline of the main body 10, The fluid is sent to the delivery path 12 of the main body 12 through the inflow channel 15 of the main body 10 and measures the fluid pressure and the air flowing through the inside of the channel by the pressure gauge 60.

As described above, the air and the fluid flowing inside the pipe can be supplied while maintaining a constant pressure, but when the pore pressure is varied due to the external environment (shock wave), the pressure is transmitted to the pressure gauge 60, It is preferable that the control unit 50 is installed in the inflow path 15 and the storage unit 16 of the main body 10 in order to prevent the main body 60 from being damaged.

That is, when the pore pressure higher than the proper pressure generated in the pipeline is supplied from the supply path 12 of the main body 10 connected to the pipeline, the controller 50 controls the head part 54 of the control part 50, The load is transmitted to the rod portion 52 of the control unit 50 inserted in the inflow path 15 of the main body 10 so that the head portion 54 of the control portion 50 is moved To seal the pressure gauge 60 so that a high pore pressure introduced into the inflow path 15 is prevented from entering.

The control unit 50 guides and blocks the air to the discharge path 14 of the main body 10 according to the pressure of the air introduced from the pipeline, 50 on both sides of the rod section 52 of the control section 50 in order to induce a proper pneumatic pressure to the delivery path 14 of the main body 10 through the outer circumferential surface of the rod section 52 of the control section 50, It is preferable that a portion 56 is provided.

The control unit 50 is moved in accordance with the air and fluid pressure of the fluid flowing in the pipe and is supplied to the main body 10 so as to supply and block the pneumatic pressure to the delivery path 14 of the main body 10. [ And a control tube 20 connected to the inflow passage 16 of the main body 10 and having a space 22 therein is installed on one side of the outer circumference of the main body 10. In the space 22 of the control tube 20, A pressure plate 30 provided on a surface portion connected to the inflow passage 15 of the main body 10 and an elastic spring 40 for closely contacting the pressure plate 30 are installed on one side of the pressure plate 30, There is an effect that it can be controlled by restoring and adjusting the pressure ratio.

4, in order to control the elasticity ratio of the elastic spring 40 according to the ratio of the air and the fluid flowing into the channel, the controller 50 controls the space portion 22 of the adjustment tube portion 20 A screw 24 is formed on an inner side of the adjusting tube 20 and is connected to the screw 24 to rotate the adjusting screw 20 to adjust the elasticity of the elastic spring 40 inserted in the space 22 of the adjusting tube 20, It is preferable that the second electrode 70 is provided.

That is, the elasticity ratio of the elastic spring 40 can be controlled by the control platen 70 as described above, so that the control of the control unit 50 can be controlled by the elastic spring 40, There is an effect that can be used.

Further, the pressure gauge protection valve device 1 according to the present invention can be used in various ways depending on the pipeline, so that the facility cost can be reduced.

As described above, the control unit 50 is moved in accordance with the air and fluid pressure of the air flowing from the supply path 12 of the main body 10, so that it can operate more precisely and quickly, The control tube portion 20 is formed with a coupling rod portion 26 protruding from one side of the control tube portion 20 so as to be inserted into the inflow path 15 of the main body 10, An inlet hole 26-2 is formed at the center of the control tube 20 to be connected to the space 22 of the control tube 20 and the body 10 is connected to one end of the coupling rod 26 of the control tube 20, A guide portion 26-4 corresponding to the feed path 14 of the control tube portion 20 and connected to the inlet hole 26-2 of the control tube portion 20 is formed so that the rod portion of the control portion 50 It is preferable to be made to be inserted into the inflow hole 26-2.

6A, the proper pneumatic pressure of the air and the fluid flowing into the pipeline flows into the supply passage 12 of the main body 10, flows into the storage portion 16 of the main body 10, The proper pneumatic pressure is introduced between the rod 52 of the control part 50 and the inflow hole 26-2 of the control tube 20 to be supplied to the pressure plate 30 to the delivery passage 14 of the main body 10 through the guide portion 26-4 of the control tube portion 20 and is fastened to the delivery path 14 of the main body 10 The pressure gauge 60 measures an appropriate pressure, and as shown in FIG. 6B, a pore pressure higher than a proper pore pressure of air and fluid flowing in the pipe flows into the supply passage 12 of the main body 10 The high inflow pressure that flows into the reservoir 16 of the main body 10 flows into the inflow hole 26-2 of the control tube 20 and the rod 52 of the controller 50, And is supplied to the rear surface of the pressure plate 30 provided in the space portion 22 of the control tube portion 20 so as to press the presser plate 30 and press the rod into the rod portion of the control unit 50 connected to the pressure plate 30, The head 52 of the control unit 50 moves so that the high pore pressure is supplied to the pressure gauge 60 by sealing the inlet hole 26-2 of the control tube 20 Thereby preventing the pressure gauge 60 from being broken.

By directly pressurizing the pressure plate 30 installed in the space portion of the control tube portion 20 rather than the operation of pushing the head portion 54 of the control portion 50 when the pressure is higher than the appropriate pressure, It is possible to control it more quickly and accurately.

As shown in FIG. 7, in order to easily replace the control unit 50, which is moved by the air and fluid pressure of the fluid flowing in the pipe, as described above, the storage unit 16 of the main body 10 And a sealing stopper 80 formed on the side surface of the body 10 so as to seal the storage portion 16 of the body 10 by forming a through hole 17 penetrating to the outside and being detachably coupled to the through hole 17 desirable.

It is possible to measure the proper pneumatic pressure of the air and the fluid flowing in the pipe through the pressure gauge 60. However, since a high pneumatic pressure is not supplied to protect the pressure gauge 60, An induction delivery path 16-2 is formed at one side of the storage part 16 of the main body 10 so as to allow the head part 54 of the control part 50 to be inserted therein, And a second pressure gauge 90 connected to one end of the induction delivery path 16-2 for measuring the variable pore pressure.

That is, as shown in FIG. 8A, an appropriate pneumatic pressure of air and fluid flowing into the pipeline flows into the supply passage 12 of the main body 10, and the air and the air stored in the reservoir 16 of the main body 10 The fluid is sent to the delivery path 12 of the main body 10 through the inflow path 15 of the main body 10 to measure the air and the fluid pressure flowing through the inside of the pipeline by the pressure gauge 60, The high pressure of the air and the fluid flowing into the main body 10 flows into the supply path 12 of the main body 10 and the pore pressure is transmitted to the head part 54 of the control part 50 as shown in FIG. The rod portion 52 of the control portion 50 inserted in the inflow path 15 of the main body 10 is transferred to the head portion 54 of the control portion 50 to the inflow path 15 of the main body 10 The pressure gauge 60 is sealed by sealing the inflow high pore pressure so that the head portion 54 of the control unit 50 A high pore pressure can be measured by the second pressure gauge 90 by supplying the high pore pressure to the induction delivery path 16-2 while being separated from the induction delivery path 16-2, .

As described above, the valve apparatus 1 for protecting a pressure gauge according to the present invention allows the pressure gauge to be protected when a high pressure is applied due to variable air pressure (shock wave) , A feed path (12) is formed at a lower portion to receive the pore pressure, and a feed path (14) for feeding the introduced pore pressure is formed at the upper portion, and an inflow path And a main body 10 having a storage part 16 formed at one end of the inflow path 15 with the inflow path 15 and the supply path 12 connected to each other, And a control tube 20 connected to the inflow passage 15 of the main body 10 and having a space 22 therein is installed on one side of the outer circumference of the main body 10, (15) of the main body (10) is formed in a space portion (22) of the main body An elastic spring 40 is installed on one side of the pressure plate 30 to closely contact the pressure plate 30 and one end of the elastic plate 40 is fastened to the pressure plate 30, The other end of the rod portion 52 is provided with a head portion 54 positioned in the storage portion 16 of the main body 10, A control section 50 having a sealing section 56 is installed on the outer periphery of both ends of the rod section 52. The control section 50 is tightly coupled to the delivery path 14 of the main body 10, And a pressure gauge 60 for measuring the pressure.

The pressure gauge protection valve device 1 of the present invention is installed in the pipeline as described above and the optimum pneumatic pressure of the air and fluid flowing in the pipeline is supplied to the supply path 12 of the main body 10 The air and the fluid stored in the storage part 16 of the main body 10 are sent to the delivery path 14 of the main body 10 through the inflow path 15 of the main body 10, 60 and the air and the fluid pressure in the duct are measured and the high pressure of the air and the fluid flowing in the duct flows into the supply path 12 of the main body 10. As shown in Figure 9B, The pneumatic pressure is transmitted to the head portion 54 of the control unit 50 so that the rod portion 52 of the control unit 50 inserted in the inflow path 15 of the main body 10 is transferred to the head 50 of the control unit 50, (54) is sealed so that a high pore pressure introduced into the inflow path (15) of the main body (10) can not be introduced Thereby protecting the pressure gauge 60.

As described above, the valve apparatus for protecting a pressure gauge according to the present invention prevents a pressure gauge for measuring a pressure of a hole to be fed through a pipe from being damaged by a variable pressure (shock wave) The second pressure gauge is installed in the main body, so that it is possible to measure static pressure and variable pressure of air or fluid flowing in the pipeline.

1: Valve unit for pressure gauge protection
10: main body 12: supply path
14: transmission path 15: inflow path
16: storage part 16-2: induction transmission path
17: Through the hole
20: regulating tube 22:
24: thread 26:
26-2: Inflow hole 26-4:
30: Platen
40: Elastic spring
50: control unit 52:
54: head part 56: sealing part
60: Pressure gauge
70: Adjustable pressure plate
80: sealing cap
90: Second pressure gauge

Claims (5)

A supply passage connected to one side of the outer circumference of the pipe through which the air and the fluid flow passes is formed at a lower portion to receive the pore pressure inside the pipe, a feed passage for feeding the introduced pore pressure is formed at the upper portion, A main body having a storage part connected to the inflow path and the supply path at one end of the inflow path;
A control tube part connected to an inlet path of the main body at one side of the outer periphery of the main body and having an inner space formed in the space part;
A pressure plate installed in a space portion of the regulating tube portion, the pressure plate being connected to a flow path of the main body;
An elastic spring for pressing the pressure plate against one side of the pressure plate;
A rod portion formed in the inflow passage of the main body is coupled to one end of the pressure plate and the other end of the rod portion is provided with a head portion located in the storage portion of the main body, Wow;
And a pressure gauge coupled to the main body of the main body to measure the pressure of the air introduced into the main body,
The control tube
A coupling rod portion in which one side of the control tube portion is protruded to be inserted into the inlet of the main body is formed and an inlet hole communicating with the space portion of the control tube portion is formed in a center portion of the coupling rod portion, Wherein an induction part corresponding to a delivery path of the main body and connected to an inflow hole of the control tube part is formed so that the rod part of the control part is inserted into the inflow hole of the control tube part.
The method of claim 1, wherein
Wherein a pressure adjusting plate is provided on one side of an inner side of the space portion of the adjusting tube portion so as to adjust the elasticity ratio of the elastic spring which is formed by a screw thread and is coupled with the screw thread to rotate, Protective valve device.
delete The method according to claim 1,
Further comprising a sealing stopper formed at one side surface of the storage portion of the main body and having a through hole formed therethrough so as to be detachably coupled to the through hole to seal the storage portion of the main body.
The method according to claim 1,
And a second pressure gauge connected to one end of the induction delivery path and measuring a variable pore pressure is provided at one side of the storage part of the main body, and an induction delivery path is formed so that the head part of the control part is recessed. Protective valve device.
KR1020150127873A 2015-09-09 2015-09-09 Press gauge for protecive valve device KR101776397B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150127873A KR101776397B1 (en) 2015-09-09 2015-09-09 Press gauge for protecive valve device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150127873A KR101776397B1 (en) 2015-09-09 2015-09-09 Press gauge for protecive valve device

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KR20170030365A KR20170030365A (en) 2017-03-17
KR101776397B1 true KR101776397B1 (en) 2017-09-07

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Publication number Priority date Publication date Assignee Title
KR102308565B1 (en) * 2017-04-17 2021-10-06 명성효다계기 주식회사 Pressure gauge with button-type protection switch
CN109374196A (en) * 2018-10-10 2019-02-22 南京佳业检测工程有限公司 A kind of online pressure-detecting device of pressure pipeline
CN114659698B (en) * 2022-03-06 2024-04-09 淮安市格洋浩瑞电子科技有限公司 Impact-resistant high-stability flat membrane type pressure sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100895610B1 (en) 2009-02-16 2009-05-06 김병운 A gas valve assembly for welding machine
KR101466919B1 (en) * 2013-10-16 2014-12-03 주식회사 협성히스코 Pressure leakage cutoff automatic valve for pressure gauge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5990421B2 (en) 2012-07-20 2016-09-14 新光電気工業株式会社 Wiring substrate, manufacturing method thereof, and semiconductor package

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100895610B1 (en) 2009-02-16 2009-05-06 김병운 A gas valve assembly for welding machine
KR101466919B1 (en) * 2013-10-16 2014-12-03 주식회사 협성히스코 Pressure leakage cutoff automatic valve for pressure gauge

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