KR20170036272A - Pressure Measurement Apparatus of Load Break Switchgear - Google Patents

Pressure Measurement Apparatus of Load Break Switchgear Download PDF

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Publication number
KR20170036272A
KR20170036272A KR1020150135229A KR20150135229A KR20170036272A KR 20170036272 A KR20170036272 A KR 20170036272A KR 1020150135229 A KR1020150135229 A KR 1020150135229A KR 20150135229 A KR20150135229 A KR 20150135229A KR 20170036272 A KR20170036272 A KR 20170036272A
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KR
South Korea
Prior art keywords
case
gas
tank
ball
pressure
Prior art date
Application number
KR1020150135229A
Other languages
Korean (ko)
Inventor
김용숙
김태환
Original Assignee
이파워텍(주)
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 이파워텍(주) filed Critical 이파워텍(주)
Priority to KR1020150135229A priority Critical patent/KR20170036272A/en
Publication of KR20170036272A publication Critical patent/KR20170036272A/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
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/56—Gas reservoirs
    • H01H33/563—Gas reservoirs comprising means for monitoring the density of the insulating gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • 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
    • H02B13/045—Details of casing, e.g. gas tightness

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The present invention relates to a pressure measurement apparatus of a load break switch for overhead, comprising; a case communicably installed in the inner space of a load break switch tank in which insulating gas is to be filled; a spring installed inside the case, and one end of which is supported to the tank; a ball installed inside the case to come into contact with the other end of the spring, thereby receiving pushing power from the spring in an opposite direction to the tank; a gas guide tube an end of one side of which passes through the case to press the ball, and having an inlet hole formed in a portion thereof inserted inside the case such that the insulating gas leaked between the outer surface of the ball and the inner surface of the case is injected therethrough, and a gas flow path which is connected to the inlet hole formed long therein; and a pressure gauge connected to an end of the other side of the gas guide tube to measure the pressure of the insulating gas provided through the gas flow path. The present invention has an advantageous effect in that the amount of insulating gas filled in the tank is easily determined, and the refilling time of the insulating gas is thus easily determined.

Description

TECHNICAL FIELD [0001] The present invention relates to a pressure measurement apparatus for a load-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pressure measuring apparatus of a work load switch, and more particularly, to a pressure measuring apparatus of a work load switch separator capable of easily grasping an amount of insulated gas filled in a tank of a load switch.

Generally, the power supplied from the substation to the power supply side is supplied from 22,000V to 26,000V. In this case, the power company has to supply the load A load break switchgear (LBS) is installed and used. Insulating gas is filled in the load switch.

In addition, the load switch has core electrical and electronic components that require electrical insulation inside the tank. They are secured by the insulated gas filled in the tank, and the insulating gas has excellent insulating and Sulfur hexafluoride (SF6) gas is widely used.

However, when the insulating gas filled in the tank of the load switch breaks down and the pressure of the insulated gas drops below a certain value, it is necessary to check the insulated gas pressure, since the insulating ability and the sooting ability can not be sufficiently secured. There is a problem that check is not easy.

Application No. 10-2013-0160489 (Registration No. 10-1513212, entitled " Insulation structure of working load switch "

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a method and apparatus for measuring the pressure of insulated gas filled in a tank of a working load switch, And an object of the present invention is to provide a pressure measuring device of a work load switch that can know the filling time of an insulating gas through an amount.

According to an aspect of the present invention, there is provided a pressure measuring apparatus for a work load switch, comprising: a case installed to communicate with a tank internal space of a working load switch filled with an insulating gas; A spring installed inside the case and having one end supported by the tank; A ball installed in the case and being provided in contact with the other end of the spring to receive a pushing force from a spring in a direction opposite to the tank; An inlet hole through which the insulating gas leaking into the space between the outer surface of the ball and the inner surface of the case is inserted is formed in a portion of the case inserted into the case, A gas guide tube having a long gas flow path formed therein; A pressure gauge connected to the other end of the gas guide tube for measuring a pressure of the insulated gas supplied through the gas passage; A cap surrounding the outer surface of the case and penetrated by the gas guide tube; And a cover which is fixedly connected to the outer surface of the cap by being spirally connected and accommodates the gas guide tube therein and the pressure gauge is located at an end thereof.

Here, the gas guide pipe and the cover are bent downward at a predetermined angle, and an O-ring is provided between the case and the cap.

In the pressure measuring apparatus of the present invention, the pressure gauge of the insulated gas guided through the gas guide pipe is measured by the pressure gauge so that the amount of the insulated gas filled in the tank can be easily grasped There is an advantage that the filling timing of the insulating gas can be easily known through the amount of the insulated gas.

Further, since the pressure gauge can be seen from the lower side by bending the cover downward at a certain angle, it is advantageous that a person on the lower side can easily grasp the pressure value measured by the pressure gauge.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional view of a pressure measuring apparatus for a work load switch breaker according to the present invention. FIG.
FIG. 2A is a view showing a state where a pressure measuring device of a load switch for a working load according to the present invention is installed in a tank; FIG.
FIG. 2B is a view showing a state in which a cover is separated from a pressure measuring device of a load switch for a work according to the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a pressure measuring apparatus of a load switch for a work according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view of a pressure measuring apparatus for a work load switch according to the present invention, FIG. 2 (a) is a view showing a state where a pressure measuring apparatus of a work load switch for a work according to the present invention is installed in a tank, 1 is a view showing a state in which a cover is detached from a pressure measuring device of a load switch for a work according to the present invention.

A pressure measuring apparatus for a working load switch according to the present invention comprises a case (10), a spring (20) provided inside the case (10), a ball (30) A pressure gauge 50 for measuring the pressure of the insulated gas supplied through the gas guide pipe 40 and a pressure gauge 50 for measuring the pressure of the insulated gas supplied through the gas guide pipe 40, A cap 60 surrounding the outer surface of the case 10 and a cover 70 fixedly coupled to the outer surface of the cap 60. [

The case 10 is provided so as to communicate with the space inside the tank T of the working load switch. More specifically, an insulating gas is filled in the inner space of the tank T of the processing load switch, and a discharge port T1 is formed on one side of the tank T for discharging the insulating gas. And the inner surface of the end portion of the case 10 is screwed and fixed to the outer surface of the outlet T1 of the tank T. [

The spring 20 has a coil spring shape and is inserted into a space formed inside the case 10 and has one end supported at the end of the outlet T1 of the tank T. [

The ball 30 is installed in the inner space of the case 10 and is in contact with the other end of the spring 20 to receive an elastic force from the spring 20. More specifically, the ball 30 is provided with a pushing force from the spring 20 in a direction opposite to the tank T. [

The diameter of the ball 30 is formed to be slightly smaller than the diameter of the space formed in the case 10 so that the insulating gas may leak between the inner surface of the case 10 and the outer surface of the ball 30. [ .

One end of the gas guide pipe 40 passes through the through hole 11 formed in one side of the case 10 and pushes the ball 30. In other words, one end of the gas guide tube 40 presses the ball 30, which is being urged by the spring 20 in the direction opposite to the tank T, so that the ball 30 is slightly moved toward the tank T will be.

The gas guide pipe 40 is formed with an inlet hole 41 at a portion inserted into the case 10 and a gas flow passage 42 connected to the inlet hole 41 is formed long inside.

The insulating gas inside the tank T leaked between the outer surface of the ball 30 and the inner surface of the case 10 is injected into the gas guide pipe 40 through the inlet hole 41, The insulated gas injected into the gas guide pipe (40) flows through the gas channel (42).

In addition, the diameter of the gas guide pipe 40 is reduced to a portion inserted into the cap 60, and the diameter of the gas guide pipe 40 is extended from the portion outside the cap 60. That is, the diameter of the portion of the gas guide tube 40 that presses the ball 30 is small and the diameter of the portion connected to the pressure gauge 50 is large.

When the gas guide pipe 40 does not press the ball 30, the ball 30 seals the through hole 11 formed in the case 10 by the elastic force of the spring 20, So as not to leak outside the case (10).

The pressure gauge 50 is connected to the other end of the gas guide pipe 40 to measure the pressure of the insulated gas supplied through the gas channel 42. That is, the insulating gas supplied through the inlet hole 41 of the gas guide pipe 40 flows through the gas channel 42 and flows until it reaches the pressure gauge 50. The pressure gauge 50 measures the pressure of the insulating gas to determine the amount of the insulating gas filled in the tank T.

If the pressure value of the insulated gas measured by the pressure gauge 50 is small, it means that the amount of the insulated gas filled in the tank T is insufficient. Therefore, the insulated gas may be supplemented into the tank T.

The inner surface of the cap 60 is coupled to the outer surface of the case 10 so as to be fixed to the outer surface of the case 10 to surround the outer surface of the case 10 and the end of the cap 60 is in close contact with the outer surface of the tank T. One end of the cap 60 is penetrated by the gas guide pipe 40.

The cap 60 prevents the leaked insulating gas from spreading into the air when the insulating gas is leaked to the part because the connection between the outlet T1 of the tank T and the case 10 is not perfect. To install.

An O-ring 12 is installed between the case 10 and the cap 60 to make this function more certain. More specifically, an O-ring mounting groove is formed on the outer surface of the case 10, and an O-ring 12 is provided in the O-ring mounting groove, so that the insulating gas leaks into the gap between the case 10 and the cap 60 It completely blocks things.

The cover 70 is fixedly coupled to the outer surface of the cap 60 in a spiral manner. The cover 70 accommodates the gas guide tube 40 in a space formed therein and the pressure gauge 50 is positioned at an end thereof. That is, the cover 70 protects the pressure gauge 50 and the gas guide pipe 40 from various external factors and at the same time helps the connection between the pressure gauge 50 and the gas guide pipe 40.

More specifically, when the pressure gauge 50 is installed in the cover 70, the scale of the pressure gauge 50 is set so as to face the outside of the cover 70 without facing the inside of the cover 70. Therefore, the scale of the pressure gauge 50 can be grasped easily from the outside.

Meanwhile, the gas guide pipe 40 and the cover 70 may be bent downward at a predetermined angle. The reason why the gas guide pipe 40 and the cover 70 are bent in this way is to allow a person standing on the ground to read the pressure value measured by the pressure gauge 50 easily.

In other words, since the working load switch may be installed at a position spaced a certain distance from the ground, such as on the upper side of the telephone pole, it is not easy to read the pressure value measured by the pressure gauge 50 in this case.

However, if the portion indicating the pressure value of the pressure gauge 50 is facing the ground, the pressure value of the pressure gauge 50 can be easily read by a person standing on the floor gently shaking his / her head. For this reason, in the present invention, the gas guide pipe 40 and the cover 70 are slightly bent downward so that the portion indicating the pressure value of the pressure gauge 50 faces downward.

10: Case 11: Through hole
12: O-ring 20: spring
30: Ball 40: Gas guide tube
41: inlet hole 42: gas channel
50: pressure gauge 60: cap
70: cover
T: tank T1: outlet

Claims (5)

A case 10 installed so as to communicate with an internal space of a tank T of a working load switch for filling insulation gas;
A spring (20) installed inside the case (10) and having one end supported by the tank (T);
A ball 30 installed inside the case 10 and provided in contact with the other end of the spring 20 to receive a pushing force from the spring 20 in a direction opposite to the tank T;
One end of the ball 30 penetrating the case 10 presses the ball 30 and an inflow hole 41 through which an insulating gas leaked between the outer surface of the ball 30 and the inner surface of the case 10 is injected A gas guide pipe (40) formed in a portion inserted into the case (10) and having a gas flow path (42) connected to the inflow hole (41);
And a pressure gauge (50) connected to the other end of the gas guide pipe (40) and measuring the pressure of the insulated gas supplied through the gas flow path (42). Device.
The method according to claim 1,
And a cap (60) surrounding the outer surface of the case (10) and penetrating by the gas guide pipe (40).
The method of claim 2,
And a cover 70 fixed to the outer surface of the cap 60 so as to be spirally coupled and to receive the gas guide tube 40 and the pressure gauge 50 at an end thereof Characterized in that the pressure measuring device of the work load switch.
The method of claim 3,
Wherein the gas guide pipe (40) and the cover (70) are bent downward at a predetermined angle.
The method of claim 2,
Wherein an O-ring (12) is provided between the case (10) and the cap (60).
KR1020150135229A 2015-09-24 2015-09-24 Pressure Measurement Apparatus of Load Break Switchgear KR20170036272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150135229A KR20170036272A (en) 2015-09-24 2015-09-24 Pressure Measurement Apparatus of Load Break Switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150135229A KR20170036272A (en) 2015-09-24 2015-09-24 Pressure Measurement Apparatus of Load Break Switchgear

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KR20170036272A true KR20170036272A (en) 2017-04-03

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KR1020150135229A KR20170036272A (en) 2015-09-24 2015-09-24 Pressure Measurement Apparatus of Load Break Switchgear

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220159152A (en) * 2021-05-25 2022-12-02 한국전력공사 Gas injection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101513212B1 (en) 2013-12-20 2015-04-17 엘에스산전 주식회사 Insulation Structure of Load Break Switchgear

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101513212B1 (en) 2013-12-20 2015-04-17 엘에스산전 주식회사 Insulation Structure of Load Break Switchgear

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220159152A (en) * 2021-05-25 2022-12-02 한국전력공사 Gas injection device
KR20230109603A (en) * 2021-05-25 2023-07-20 한국전력공사 Gas injection device
KR20230109602A (en) * 2021-05-25 2023-07-20 한국전력공사 Gas injection device

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