KR101459579B1 - Manual valve opening degree detecting apparatus and method thereof - Google Patents

Manual valve opening degree detecting apparatus and method thereof Download PDF

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Publication number
KR101459579B1
KR101459579B1 KR1020140060577A KR20140060577A KR101459579B1 KR 101459579 B1 KR101459579 B1 KR 101459579B1 KR 1020140060577 A KR1020140060577 A KR 1020140060577A KR 20140060577 A KR20140060577 A KR 20140060577A KR 101459579 B1 KR101459579 B1 KR 101459579B1
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KR
South Korea
Prior art keywords
valve
valve opening
opening degree
value
hole
Prior art date
Application number
KR1020140060577A
Other languages
Korean (ko)
Inventor
박종규
허응무
이정수
송정관
노준래
Original Assignee
주식회사 씨노텍
뉴토크코리아주식회사
주식회사 은광이노텍
송정관
노준래
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Application filed by 주식회사 씨노텍, 뉴토크코리아주식회사, 주식회사 은광이노텍, 송정관, 노준래 filed Critical 주식회사 씨노텍
Priority to KR1020140060577A priority Critical patent/KR101459579B1/en
Application granted granted Critical
Publication of KR101459579B1 publication Critical patent/KR101459579B1/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
    • F16K1/16—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 with pivoted closure-members
    • F16K1/18—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 with pivoted closure-members with pivoted discs or flaps
    • F16K1/22—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 with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
    • 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
    • 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
    • F16K27/0209—Check valves or pivoted valves
    • F16K27/0218—Butterfly valves
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/0041—Electrical or magnetic means for measuring valve parameters

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

The present invention relates to an apparatus for detecting an opening degree of a manual valve which includes an opening degree detector attached on a valve of a pipe to be rotated with the valve to measure and output an opening degree value of the valve; a signal cable having one side connected to the opening degree detector and the other side connected to a converter to transfer the opening degree value of the valve outputted from the opening degree detector to the converter; and a converter including a first signal input unit receiving the opening degree value of the valve from the signal cable, a first process unit converting the opening degree value of the valve into a digital signal, and a first display unit displaying the digital signal outputted from the first process unit. According to the present invention, an apparatus and method for detecting an opening degree of a manual valve, wherein a user may easily check an opening degree of a valve inside a manhole on the ground without directly entering inside the manhole, may be provided.

Description

[0001] The present invention relates to a manual valve opening degree detecting apparatus and method,

The present invention relates to an apparatus and a method for detecting a manual valve opening, and more particularly, to a manual valve opening detecting apparatus and method for controlling a supply amount of a water, gas, oil, An opening detector for detecting the opening state of the manual valve so that the valve opening degree can be easily checked on the ground without entering the manhole, and a converter for allowing the user to visually confirm the opening degree of the manual valve. And more particularly, to a device and method for detecting a degree of opening of a valve in a manhole easily on the ground.

The present invention relates to an apparatus and a method for detecting a manual valve opening degree.

As a background of the present invention, as disclosed in Korean Utility Model Registration No. 0269034, a valve opening value indicator is formed directly on the valve, so that the user can directly check the opening value of the valve disk .

1A and 1B, the conventional valve opening display device is installed in a valve located in a manhole. When a valve operation is required, the user first enters the manhole directly to check the opening of the valve, There is a problem that the valve opening / closing operation must be performed as much as desired.

In order to do this, the user must first check whether the inside of the manhole is inundated and the remaining harmful gas before entering the manhole, and because it is necessary to perform preliminary work for drainage and discharge of the leachate etc., There is a problem.

Therefore, it is a reality that the valve operation is generally performed by the user's experience. In this case, when the valve opening value is not precisely known, the gear and shaft of the manual valve are disengaged or ruptured There is a problem that the valve is easily broken and the operation of the valve becomes impossible to stop the supply of the water, gas, and oil, resulting in complaints of the consumer, and the cost of repairing the valve is increased.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a manual valve opening degree detecting apparatus and method capable of easily checking a valve opening state in a manhole on the ground without a user entering the manhole will be.

It is a further object of the present invention to provide a method and a system for comparing a manhole route information and a manhole route information provided in a pipeline supply system using a GPS transceiver with location information of a geographic information system (GIS) And an apparatus and method for detecting an opening degree.

It is still another object of the present invention to provide a manual valve opening degree detecting apparatus and method capable of storing a valve opening value and confirming a valve opening value at a desired position by inputting a retrieval value, .

It is still another object of the present invention to provide an apparatus and method for detecting a manual valve opening degree, which can easily confirm the valve opening value in a portable terminal through a manual valve opening value checking application.

It is still another object of the present invention to provide an apparatus and method for detecting a manual valve opening degree capable of easily attaching and detaching an opening detector to an existing valve.

According to an aspect of the present invention, there is provided an apparatus for detecting a manual valve opening degree, the apparatus comprising: an opening degree detector mounted on a valve and rotating together with the valve to measure and output a valve opening value; A signal cable, one side of which is connected to the opening detector, the other side of which is connected to a converter, and which transmits a valve opening value output from the opening detector to a converter; A first signal input unit receiving a valve opening value from the signal cable; a first process unit converting a valve opening value into a digital signal; and a first display unit displaying a digital signal output from the first process unit; A gateway device for a portable terminal interface having a wired or wireless transmission / reception function, which is connected to the other side of the signal cable, receives a valve opening value from the opening detector, and can check a valve opening value in a manual valve opening value confirmation application installed in the portable terminal ; Wherein the valve is configured such that when the valve handle is rotated, the stem and the disk connected to the stem turn together to open and close the piping; Wherein the opening detector includes a potential meter, a holder, a first bracket, and a second bracket, wherein the potential meter comprises: A shaft received in the holder and rotating with the holder; A head for measuring a resistance value depending on a rotating angle of the shaft by a principle of a variable resistor; Wherein the holder includes a shaft receiving portion having a diameter corresponding to the diameter of the shaft and fixed when the shaft is received; A fixing plate formed at a lower end of the shaft accommodating portion in a plate shape and having a first bolt hole and being engaged with the valve indicator by a bolt inserted into the first bolt hole and rotated together with the valve indicator; Wherein the first bracket is formed with a porthole, the potential meter is inserted and fixed by a first nut, and a first hole having an elongated hole is formed, Wherein the second hole is fixed to the first bracket by a bolt passing through the first hole and the second hole and one side of the second bracket is fixed to the pipe, Further comprising at least one of a GPS transmitting / receiving unit, a memory unit, a key input unit, a first Bluetooth transmitting / receiving unit, and a first charging and discharging power supply circuit, wherein the first signal input unit And at least two input terminals capable of receiving input.

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As described above, according to the present invention, it is possible to provide a manual valve opening degree detecting apparatus and method which can easily confirm the valve opening state in the manhole on the ground without the user directly entering the manhole.

In addition, according to the present invention, it is possible to detect the position of the manhole by comparing the channel line information and the manhole location provided in the pipeline supply system using the GPS transceiver with the position information of the geographic information system (GIS) Apparatus and method.

Also, according to the present invention, it is possible to provide a manual valve opening degree detecting apparatus and method capable of storing a valve opening value, inputting a retrieval value, and confirming a valve opening value at a desired position, have.

In addition, according to the present invention, it is possible to provide a manual valve opening degree detecting apparatus and method which can easily confirm a valve opening value in a portable terminal through a manual valve opening value checking application.

Further, according to the present invention, it is possible to provide a manual valve opening degree detecting apparatus and method that can easily attach and detach an opening degree detector to an existing valve.

Figs. 1A to 1B are views showing a conventional method of observing the valve opening value.
2 is a view illustrating a manual valve opening degree detecting apparatus according to a preferred embodiment of the present invention.
3 is a view illustrating a manual valve opening degree detecting apparatus according to another preferred embodiment of the present invention.
4A is an exploded perspective view of an opening detector according to a preferred embodiment of the present invention.
4B is a front view of an opening detector according to a preferred embodiment of the present invention.
4C is an assembled view of an opening detector according to a preferred embodiment of the present invention.
5A is a block diagram of a converter according to a preferred embodiment of the present invention.
5B is a block diagram of a gateway device for a portable terminal interface according to a preferred embodiment of the present invention.
6 is an installation view of an opening detector according to a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

2 is a view illustrating a manual valve opening degree detecting apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the manual valve opening detecting apparatus 100 of the present invention includes an opening detector 110, a signal cable 120, and a converter 130.

The opening degree detector 110 may be mounted on the valve 30 or the valve indicator 40 to measure and output the valve opening value while rotating together with the valve 30 when the valve 30 is opened or closed.

4A, the opening detector 110 includes a potential meter 111, a first nut 112, a holder 113, a first bracket 114, a second bracket 115, a bolt 116, 2 nut (117).

The potential meter 111 is generally a variable resistor used to adjust the volume of a radio or the like. The potential meter 111 is inserted into a port hole 114a formed in the first bracket 114 and fixed by a first nut 112 at a lower end of the first bracket 114, And a shaft 111b.

The holder 113 includes a shaft receiving portion 113a, a fixing plate 113b, and a first bolt hole 113c.

The shaft receiving portion 113a has a diameter corresponding to the diameter of the shaft 111b, so that the shaft 111b is received and fixed.

The fixing plate 113b is formed at the lower end of the shaft accommodating portion 113a and is provided with a first bolt hole 113c. The fixing plate 113b is fastened to the valve indicator 40 by a bolt 116 inserted into the first bolt hole 113c.

6, when the valve 30 is rotated by a normal butterfly valve, the stem 30b and the disk 30c connected to the stem 30b turn together to open and close the valve 30 . In addition, the butterfly valve is generally provided with a valve indicator 40 that rotates together with the stem 30b, so that the opening state of the pipe can be visually confirmed easily.

A holder 113 is coupled to the valve indicator 40.

The potential meter 111 includes a head 111a and a shaft 111b.

The shaft 111b is fixed to the holder 113 and rotates together.

The resistance of the head 111a varies depending on the angle at which the shaft 111b rotates due to the principle of variable resistance, and the resistance value can be measured, thereby measuring the opening value of the valve 30.

A signal cable 120 is connected to the head 111a to transmit resistance value data through the signal cable 120. [

The first bracket 114 has a rectangular plate shape and has a porthole 114a on one side and a first hole 114b in the form of a long hole on the side of the porthole 114a.

The second bracket 115 is bent in a U-shape, and has a second hole 115a formed in an upper surface thereof and a second bolt hole 115b formed in a lower surface thereof.

The first bracket 114 and the second bracket 115 are positioned such that the first hole 114b and the second hole 115a partially overlap each other and the first hole 114b and the second hole 115a The at least one bolt 116 is fastened. Since the first hole 114b and the second hole 115a are each in the shape of an elongated hole, the fastening position of the bolt 116 can be freely adjusted according to the position where the second bracket 115 is fixed.

A bolt 116 is inserted through the second bolt hole 115b to be coupled to a portion of the body of the valve 30 or the body of the pipe 20 that does not rotate together with the valve, Is fixed.

One side of the signal cable 120 is connected to the opening detector 110 and the other side is connected to the converter 130 to transmit the valve opening value output from the opening detector 110 to the converter 130. The signal cable 120 is waterproof coated and protected from groundwater or leachate.

The converter 130 includes a first signal input unit 131, a first process unit 132, and a first display unit 133.

The first signal input unit 131 receives the valve opening value from the signal cable 120 and transmits the valve opening value to the first process unit 132.

The first signal input unit 131 includes at least two input terminals (not shown) capable of receiving a pressure value of the pipeline. A pressure sensor (not shown) is installed in the pipeline to measure the pressure value of the pipeline and transmit the pressure value to the input terminal (not shown).

The first process unit 132 converts the valve opening value received from the first signal input unit 131 into a digital signal through an MCU (Micro Controller Unit) and outputs the digital signal.

The first display unit 133 displays the valve opening value output from the first process unit 132. The first display unit 133 may be an LCD touch screen or the like.

The converter 130 includes at least one of a GPS transceiver 134, a memory 135, a key input 136, a first Bluetooth transceiver 137, and a first charging and discharging power circuit 138 Or more.

The GPS transmission / reception unit 134 compares the channel line information provided in the channel supply system and the position of the manhole 10 with the position information of the geographic information system (GIS) of each medium, so that the position of the manhole 10 can be easily found.

The memory unit 135 stores the valve opening value converted by the first processing unit 132 together with position information of the manhole. A slot for an external memory card is formed in the memory unit 135, and an SD memory card or the like can be inserted and used for storage.

The key input unit 136 is an input device for storing the valve opening value in the memory unit 135 and searching for information such as the stored valve opening value or the like. The user may directly store the opening value through the key input unit 136, And the result of the valve opening value or the like can be seen through the first display unit 133. [

The first Bluetooth transceiver unit 137 functions to transmit the valve opening value to the outside through the Bluetooth to a short range wireless communication device that allows the valve opening value to be confirmed through the portable terminal 50 such as a mobile phone or a notebook computer.

The first charging and discharging power supply circuit 138 is a circuit that can operate semi-permanently using only the internal battery without external power supply. At this time, the battery uses rechargeable battery.

In addition, the manual valve opening degree detecting apparatus 100 may further include a gateway device 140 for a portable terminal interface.

The gateway device 140 for the portable terminal interface is connected to the other side of the signal cable 120 and receives the valve opening value from the opening detector 110. In the manual valve opening value confirmation application installed in the portable terminal 50, And a wired or wireless transmitting / receiving function is provided so that the value can be confirmed.

5B, the portable terminal interface gateway device 140 includes a second signal input unit 141, a second process unit 142, a second display unit 143, a second Bluetooth transceiver 147, And a second charge and discharge power supply circuit 148.

The second signal input unit 141 receives the valve opening value from the signal cable 120.

The second signal input unit 141 includes at least two input terminals (not shown) capable of receiving characteristic values such as the pressure of the pipeline in addition to the valve opening value.

The second process unit 142 converts the valve opening value received from the second signal input unit 141 into a digital signal through an MCU (Micro Controller Unit) and outputs the digital signal.

The second display unit 143 displays the valve opening value output from the second process unit 142. The second display unit 143 may be an LCD touch screen or the like.

The second Bluetooth transceiver 147 functions to transmit the valve opening value to the outside through the Bluetooth to a short range wireless communication device that allows the valve opening value to be confirmed through the portable terminal 50 such as a mobile phone or a notebook computer.

The second charging and discharging power supply circuit 148 is a circuit that can operate semi-permanently using only the internal battery without external power supply. At this time, the battery uses rechargeable battery.

The manual valve opening value verification application is installed in the portable terminal 50 and includes a surrounding manhole search module and a map selection module.

The nearby manhole search module receives the position information of the manhole 10 around the user through GPS and receives the position of the manhole 10 and the valve opening value in the manhole 10 and displays the value on the portable terminal 50.

The map selection module displays the position of the manhole 10 on the map and displays the valve opening value in the manhole 10 on the portable terminal 50 when the user selects one of them.

In another aspect of the present invention, there is provided a method for detecting a manual valve opening degree, the method comprising: (a) measuring an opening degree of a valve while rotating an opening detector attached to a valve of the pipe, (C) transmitting a valve opening value from the signal cable at the first signal input part provided in the converter, and (c) detecting a valve opening value from the signal cable at the first signal input part provided in the converter, And converting the digital signal into a digital signal in the first process unit, and displaying the digital signal on the first display unit.

The step (c) includes the steps of: (c ') receiving a valve opening value from the signal cable at a second input unit of the gateway device for a portable terminal interface, converting the valve opening value into a digital signal at a second process unit, May be replaced with a displaying step.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

10 manhole 20 pipe
30 valve 30a valve handle
30b stem 30c disk
40 Valve Indicator 50 Portable Terminal
100 Manual valve opening detector
110 degree detector
111 Potential Meter 111a Head
111b shaft 112 first nut
113 holder 113a shaft receiving portion
113b fixing plate 113c first bolt hole
114 first bracket 114a pothole
114b first hole 115 second bracket
115a second hole 115b second bolt hole
116 Volts 117 Second nut
120 signal cable 130 converter
131 first signal input unit 132 first process unit
133 first display section 134 GPS transmission / reception section
135 memory unit 136 key input unit
137 first Bluetooth transmitting / receiving unit 138 first charging and discharging power supply circuit
140 Gateway Device for Portable Terminal Interface
141 second signal input unit 142 second process unit
143 Second display part 147 Second Bluetooth transmitting / receiving part
148 Second charging and discharging power supply circuit

Claims (7)

An opening detector attached to the valve and rotating together with the valve to measure and output the valve opening value;
A signal cable, one side of which is connected to the opening detector, the other side of which is connected to a converter, and which transmits a valve opening value output from the opening detector to a converter;
A first signal input unit receiving a valve opening value from the signal cable; a first process unit converting a valve opening value into a digital signal; and a first display unit displaying a digital signal output from the first process unit;
A gateway device for a portable terminal interface having a wired or wireless transmission / reception function, which is connected to the other side of the signal cable, receives a valve opening value from the opening detector, and can check a valve opening value in a manual valve opening value confirmation application installed in the portable terminal ; Lt; / RTI >
The valve is configured such that when the valve handle is rotated, the stem and the disk connected to the stem turn together to open and close the piping; Wherein the valve is a butterfly valve including a valve indicator rotated together with the stem and exposed to the outside,
Wherein the opening detector includes a potential meter, a holder, a first bracket and a second bracket,
The potentiometer may include: a shaft received in the holder and rotating together with the holder; A head for measuring a resistance value depending on a rotating angle of the shaft by a principle of a variable resistor; , Wherein:
Wherein the holder has a shaft receiving portion having a diameter corresponding to the diameter of the shaft and fixed when the shaft is received; A fixing plate formed at a lower end of the shaft accommodating portion in a plate shape and having a first bolt hole and being engaged with the valve indicator by a bolt inserted into the first bolt hole and rotating together with the valve indicator; , Wherein:
Wherein the first bracket is formed with a porthole, the potentiometer is inserted and fixed by a first nut, and a first hole of an elongated hole is formed,
The second bracket is provided with a second hole having an elongated hole shape and is fixed to the first bracket by bolts passing through the first hole and the second hole and one side of the second bracket is fixed to the pipe. and,
The transducer further includes at least one of a GPS transceiver, a memory, a key input, a first Bluetooth transceiver, and a first charging and discharging power supply circuit.
Wherein the first signal input unit includes at least two input terminals capable of receiving a pressure value of the piping. delete delete delete delete delete delete
KR1020140060577A 2014-05-20 2014-05-20 Manual valve opening degree detecting apparatus and method thereof KR101459579B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101547817B1 (en) 2015-04-09 2015-08-27 뉴토크코리아주식회사 Electric actuator having detecting and removing function for foreign substance
CN110185841A (en) * 2019-07-05 2019-08-30 金陵科技学院 It is a kind of can be with the butterfly valve and measurement method of measurement position
KR102035850B1 (en) * 2018-05-25 2019-11-08 지에스칼텍스 주식회사 Electronic sealing device for oil tank car
KR102150699B1 (en) * 2020-05-08 2020-09-01 서일석 Water valve control system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09217848A (en) * 1996-02-15 1997-08-19 Nohmi Bosai Ltd Emergency cutoff device for gas piping
JP2003042336A (en) * 2001-07-30 2003-02-13 Sumida Tekko Kk Valve opening meter and gate opening meter
KR20100001705A (en) * 2008-06-27 2010-01-06 주식회사알피엠텍 Detecting device for valve opening-closing
KR20100025600A (en) * 2008-08-28 2010-03-10 한국과학기술연구원 Wireless sensor platforms accessible to mobile terminals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09217848A (en) * 1996-02-15 1997-08-19 Nohmi Bosai Ltd Emergency cutoff device for gas piping
JP2003042336A (en) * 2001-07-30 2003-02-13 Sumida Tekko Kk Valve opening meter and gate opening meter
KR20100001705A (en) * 2008-06-27 2010-01-06 주식회사알피엠텍 Detecting device for valve opening-closing
KR20100025600A (en) * 2008-08-28 2010-03-10 한국과학기술연구원 Wireless sensor platforms accessible to mobile terminals

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101547817B1 (en) 2015-04-09 2015-08-27 뉴토크코리아주식회사 Electric actuator having detecting and removing function for foreign substance
KR102035850B1 (en) * 2018-05-25 2019-11-08 지에스칼텍스 주식회사 Electronic sealing device for oil tank car
CN110185841A (en) * 2019-07-05 2019-08-30 金陵科技学院 It is a kind of can be with the butterfly valve and measurement method of measurement position
KR102150699B1 (en) * 2020-05-08 2020-09-01 서일석 Water valve control system

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