KR20130019696A - Valve having functions for preventing miscontrol - Google Patents

Valve having functions for preventing miscontrol Download PDF

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Publication number
KR20130019696A
KR20130019696A KR1020110081810A KR20110081810A KR20130019696A KR 20130019696 A KR20130019696 A KR 20130019696A KR 1020110081810 A KR1020110081810 A KR 1020110081810A KR 20110081810 A KR20110081810 A KR 20110081810A KR 20130019696 A KR20130019696 A KR 20130019696A
Authority
KR
South Korea
Prior art keywords
valve
plug
contact
bracket
handle
Prior art date
Application number
KR1020110081810A
Other languages
Korean (ko)
Inventor
곽희섭
김태옥
송양용
Original Assignee
한국전력공사
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
Application filed by 한국전력공사 filed Critical 한국전력공사
Priority to KR1020110081810A priority Critical patent/KR20130019696A/en
Publication of KR20130019696A publication Critical patent/KR20130019696A/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/80—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
    • H01H33/82—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/03—Avoiding erroneous switching

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

Abstract

The present invention relates to a valve having a misoperation prevention function, wherein a valve having a misoperation prevention function according to the present invention is a handle having a locking hole as a handle for closing or opening the valve by moving down or up by rotation. ; A bracket surrounding the handle, the bracket having a through hole; A plug external to the bracket, the plug having a locking pin passing through the through hole; A spring contained in the plug, the spring pushing the plug in the direction in which the handle is located; A solenoid coil for moving the plug in a direction opposite to the direction in which the spring pushes the plug when the solenoid coil is excited; And a power and control cable for exciting the solenoid coil, wherein the spring pushes the plug in such that the locking pin is inserted into the locking hole through the through hole when the valve is closed.

Description

VALVE HAVING FUNCTIONS FOR PREVENTING MISCONTROL}

The present invention relates to a valve having a misoperation prevention function, and more particularly to a valve having a function of allowing a live or running valve to be opened if desired without being misoperated.

SF 6 Gas is filled and used inside GIS (Gas Insulator Switchgear) operating in power system with excellent insulation performance and excellent extinguishing ability during breaker operation.

GIS is a key device that receives power from substations, connects the grids, and supplies power converted to appropriate voltages through large transformers. Therefore, GIS maintains performance and recovers its functions through regular overhauls and repairs in the event of equipment failure. Due to the nature of substation power supply, such precise inspection and repair should be interrupted by only a part of the equipment (applicable equipment), and recovery of sulfur hexafluoride gas (SF 6 Gas) being filled in the equipment is opened by opening the valve of the equipment. It has the specificity of the work to be done afterwards.

SF 6 Gas recovery should only recover the gas of the equipment.In the situation where several equipments are mixed in a narrow space, the piping for SF 6 Gas is complicated and the valve of the equipment is separate from the gas tank. It is installed in the) and due to the misunderstanding of the valve for the electric machine (work object) and live equipment, not only large power failure but also worker safety accident occurs.

This accident causes power supply disruption due to substation total power outage and delay of recovery time, which causes loss of electricity sales and disrupts the production activities of the national economy.

In addition, many valves such as gas insulated switchgear, peripheral pressure, and air pressure are used for instantaneous inspection of substations, but it is not possible to visually check the indication of opening and closing. In addition, there have been frequent cases of progression of equipment failure due to inaccurate grasping and closing of the valve during the instantaneous period.

An object of the present invention is to provide a function to automatically determine whether the operation target device is live or running in order to prevent operation errors due to misunderstanding of the valve during SF 6 gas recovery, so that the live or operating valve is not opened. It is to provide a valve with a tamper-evident function and a fully open / close display device that can be distinguished even from a distance during instantaneous.

Furthermore, it is an object of the present invention to develop a gas compartment with a pressure alarm function so that a quick section can be identified in case of a failure using such a valve.

According to an aspect of the present invention, the present invention relates to a valve having a malfunction prevention function, in order to achieve the above object, the valve having a malfunction prevention function according to the present invention is moved downward or upward by rotation. A handle for closing or opening the valve, the handle having a locking hole; A bracket surrounding the handle, the bracket having a through hole; A plug external to the bracket, the plug having a locking pin passing through the through hole; A spring contained in the plug, the spring pushing the plug in the direction in which the handle is located; A solenoid coil for moving the plug in a direction opposite to the direction in which the spring pushes the plug when the solenoid coil is excited; And a power and control cable for exciting the solenoid coil, wherein the spring pushes the plug so that the locking pin is inserted into the locking hole through the through hole when the valve is closed.

According to an embodiment of the present invention, the valve with a misoperation prevention function according to the present invention further includes a limit switch having a contact point for transmitting an electrical signal inside the bracket, while the handle is moved up or down The contact may be turned on or off by changing the angle formed between the limit switch and the bracket.

According to an embodiment of the present invention, the valve with a misoperation prevention function according to the present invention may further include a control panel including a release button forcibly exciting the solenoid coil.

According to an embodiment of the present invention, a valve having a misoperation prevention function according to the present invention includes a control panel including a lamp indicating a case in which the contact is on and a case in which the contact is off. It may further include.

According to an embodiment of the present invention, the valve with a misoperation prevention function according to the present invention further includes a limit switch having a contact point for transmitting an electrical signal inside the bracket, while the handle is moved up or down By changing the angle between the limit switch and the bracket, the contact is turned on or off, and the control panel displays a case where the contact is on and a case where the contact is off. It may further include a lamp.

According to an embodiment of the present invention, the valve with a misoperation prevention function according to the present invention, the valve is a valve of SF 6 Gas of the gas insulated switchgear, the solenoid coil is a work object to be recovered SF 6 Gas It can be excited in a truce state.

According to an aspect of the present invention, the present invention relates to a valve monitoring system using a SCADA system, the valve monitoring system using a SCADA system according to the present invention includes a valve having a malfunction prevention function according to the present invention; A monitor for graphically displaying the gas compartment diagram; And collecting a state in which the contact is on or off through an RTU, and displaying the state in which the contact is on or off in the gas compartment diagram and displaying the state on the monitor. It may include.

The present invention makes it possible to prevent false operation of the valve due to human mistake and mistake and to monitor the valve visually remotely or directly on site.

FIG. 1 illustrates an example in which a valve having a misoperation prevention function according to the present invention is applied to a GIS SF 6 gas valve, and shows a closed state of the valve.
2 is a schematic diagram of a valve and gas pressure monitoring system using a valve and a Supervisory Control And Data Acquisition (SCADA) system according to the present invention.

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

The valve having a misoperation prevention function according to the present invention inserts a locking pin into a locking hole formed in the valve in order to prevent the user from opening the valve by misoperation while the valve is closed. To prevent it from rotating. The state in which the locking pin is inserted into the locking hole formed in the valve is defined as the locked state of the valve.

FIG. 1 illustrates an example in which a valve having a misoperation prevention function according to the present invention is applied to a GIS SF 6 gas valve, and shows a closed state of the valve.

Referring to FIG. 1, in general, even when the handle 3 of the valve is rotated clockwise, the valve is no longer rotated and the valve is closed when stopped, and the valve is rotated by rotating the handle 3 of the valve counterclockwise. It becomes an open state.

The valve according to the invention comprises a handle 3, a bracket 10, a plug 5, a spring 9, a solenoid coil 6, and a power and control cable 1.

The handle 3 closes or opens the valve by moving down or up by rotation, and has a locking hole 4. The bracket 10 surrounds the handle 3 and has a through hole 11. The plug 5 is external to the bracket 10 and has a locking pin 8 passing through the through hole 11. The spring 9 is inside the plug 5 and pushes the plug 5 in the direction in which the handle 3 is present. The spring 9 pushes the plug so that the locking pin 8 is inserted into the locking hole 4 through the through hole 11 when the valve is closed. The solenoid coil 6 moves the plug 5 in the direction opposite to the direction in which the spring 9 pushes the plug 5 when excited. The power and control cables are cables that provide control signals and power for exciting the solenoid coil 6. The cover 7 houses the solenoid coil 6 and the plug 5, and the plug 5 houses the spring 9 and the locking pin 8.

In the present invention, the spring 9 is kept in a state of always pushing the locking pin 8. By the action of this spring 9, the locking pin 8 is forced from the spring 9 into the locking hole 4 while the valve is closed and the valve is locked. In this state, the valve does not move even if it is rotated counterclockwise to open the valve. According to an embodiment, the locking pin 8 may be implemented using a plunger.

The locking pin 8 inserted into the locking hole 4 by the force of the spring 9 is moved to the left together when the solenoid coil 6 fixed to the bracket 10 is excited and the plug 5 moves to the left. It moves out of the locking hole 4. Thus, when the solenoid coil 6 is excited and the locking pin 6 is pulled out of the locking hole 4, the valve is unlocked. At this time, the handle 3 of the valve is rotated counterclockwise so that the valve Can be left open.

The solenoid coil 6 is excited through the power supply and control cable 1, and the conditions for exciting the solenoid coil 6 can be determined in various ways depending on the application and the application in which the valve is installed. For example, when the valve according to the present invention is applied to a valve of SF 6 Gas of a gas insulated switchgear, in order to prevent the misoperation of the valve during SF 6 Gas recovery for maintenance of the gas insulated switchgear, i) SF When the work subject to recover 6 gas is in the state of cease-fire (i.e. no electricity supply), and ii) the valve is forcibly operated to check or measure the state of the machine by drawing a small amount of SF 6 gas without doing work. When it is necessary to open, may be determined as a condition for exciting the solenoid coil (6).

On the other hand, in order to be able to forcibly open the valve, the solenoid coil 6 can be excited by pressing the release button of the control panel 2.

The valve according to the present invention may further include a limit switch 12.

The limit switch 12 has a contact point for transmitting an electrical signal inside the bracket 10. The handle 3 moves downward or upward to change the angle between the limit switch 12 and the bracket, so that the contact is turned on or off.

The control panel 2 may include a lamp (closed indicator lamp) for indicating that the valve is closed and a lamp (open indicator lamp) for indicating that the valve is opened, in addition to a release button forcibly exciting the solenoid coil 6. Can be. In some embodiments, a red lamp may be used as the closing display lamp and a green lamp may be used as the opening display lamp. When the valve is closed, the handle moves downward and pushes the limit switch 12, so that the angle between the limit switch and the bracket is narrowed and the contact of the limit switch 12 is turned on to turn on the red lamp. When opening the valve, as the handle moves upward, the angle between the limit switch and the bracket is widened so that the contacts of the limit switch 12 are turned off to turn on the green lamp.

2 is a schematic diagram of a valve and gas pressure monitoring system using a valve and a SCADA system according to the present invention.

A valve monitoring system using a valve and a SCADA system according to the present invention includes a monitor for displaying a gas compartment diagram graphically; And collecting the state in which the contact of the limit switch 12 is turned on or off through the RTU, and the state in which the contact of the limit switch 12 is turned on or off in the gas compartment. It includes a computer that is shown in the figure and displayed on a monitor.

The computer graphically displays the gas compartment diagram 14 on the feedstock command console monitor.

The valve monitoring by the valve monitoring system is performed by linking the opening / closing indication limit switch contact state (13) of the valve with the valve of the monitor gas block diagram through the RTU (remote location equipment) to display the alarm and the color of the valve when opening and closing, for example, green (16). By changing to

The valve and gas pressure monitoring system further includes a gas pressure monitoring function in addition to the valve monitoring function by the valve monitoring system. The gas pressure monitoring can be performed by linking the alarm contact of the GIS gas manometer with the gas compartment diagram 14 of the monitor to change the pressure drop alarm and the color 15 of the gas compartment.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

It will be understood from the foregoing description that the foregoing and equivalents thereof may be embodied in various forms. Therefore, while the description of the invention has been described in connection with specific embodiments, the true scope of the invention includes the following claims and any equivalents that may be contemplated per se to those skilled in the art, as described herein. It is not intended to be limited to the particular embodiment.

1: power and control cable 2: control panel
3: handle 4: locking hole
5: plug 6: solenoid coil
7: cover 8: locking pin
9: spring 10: bracket
11: Through Hole 12: Limit Switch
13: Open / close display of valve Limit switch
14: Gas compartment diagram of the feed station commander console monitor
15: Pressure drop alarm and gas color change indication
16: Display valve color change in monitor gas block diagram

Claims (7)

In the valve provided with a misoperation prevention function,
A handle for closing or opening the valve by moving down or up by rotation, comprising: a handle having a locking hole;
A bracket surrounding the handle, the bracket having a through hole;
A plug external to the bracket, the plug having a locking pin passing through the through hole;
A spring contained in the plug, the spring pushing the plug in the direction in which the handle is located;
A solenoid coil for moving the plug in a direction opposite to the direction in which the spring pushes the plug when the solenoid coil is excited; And
A power and control cable for exciting the solenoid coil,
And the spring pushes the plug so that the locking pin is inserted into the locking hole through the through hole when the valve is closed. The method of claim 1,
It further includes a limit switch having a contact for transmitting an electrical signal inside the bracket,
And the contact point is turned on or off by changing an angle formed between the limit switch and the bracket while the handle is moved up or down. The method of claim 1,
And a control panel including a release button for forcibly exciting the solenoid coil. The method of claim 2,
And a control panel including a lamp for indicating when the contact is on and when the contact is off. The method of claim 3, wherein
It further includes a limit switch having a contact for transmitting an electrical signal inside the bracket,
The contact is turned on or off by changing the angle between the limit switch and the bracket while the handle is moved up or down,
The control panel further comprises a lamp for indicating when the contact is on (on) and when the contact is off (off). 6. The method according to any one of claims 1 to 5,
The valve is a valve of SF 6 Gas of the gas insulation opening device,
The solenoid coil is a valve having an erroneous operation prevention function, characterized in that the excitation in the state in which the work object to be recovered SF 6 Gas is interrupted. A valve monitoring system using a SCADA system,
A valve according to any one of claims 2 to 5;
A monitor for graphically displaying the gas compartment diagram; And
And collecting a state in which the contact is turned on or off through an RTU, and displaying the state in which the contact is turned on or off in the gas compartment diagram and displaying the state on the monitor. and,
The valve is a valve monitoring system, characterized in that the valve of the gas insulation opening device SF 6 Gas.
KR1020110081810A 2011-08-17 2011-08-17 Valve having functions for preventing miscontrol KR20130019696A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110081810A KR20130019696A (en) 2011-08-17 2011-08-17 Valve having functions for preventing miscontrol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110081810A KR20130019696A (en) 2011-08-17 2011-08-17 Valve having functions for preventing miscontrol

Publications (1)

Publication Number Publication Date
KR20130019696A true KR20130019696A (en) 2013-02-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110081810A KR20130019696A (en) 2011-08-17 2011-08-17 Valve having functions for preventing miscontrol

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KR (1) KR20130019696A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109167290A (en) * 2018-08-22 2019-01-08 中电投东北能源科技有限公司 Confined space operation prevents the braking error-proof device and control method of maloperation
KR102448686B1 (en) * 2022-04-05 2022-09-29 주식회사 비오에이 Fire truck PTO emergency control device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109167290A (en) * 2018-08-22 2019-01-08 中电投东北能源科技有限公司 Confined space operation prevents the braking error-proof device and control method of maloperation
CN109167290B (en) * 2018-08-22 2023-10-20 中电投东北能源科技有限公司 Brake error preventing device for preventing misoperation in limited space operation and control method
KR102448686B1 (en) * 2022-04-05 2022-09-29 주식회사 비오에이 Fire truck PTO emergency control device

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