KR101155775B1 - Inspection method and inspection device for a ground electrical power equipment - Google Patents

Abstract

PURPOSE: An apparatus and method for inspecting a ground power facility are provided to easily check a connection fault of a contact rod by measuring inner temperatures of a bushing and an elbow connection member through a temperature measuring device. CONSTITUTION: The combination and deformation of a bushing(B) and an elbow connection member(L) are checked with the naked eye. Foreign materials are removed from the bushing and the elbow connection member by a cleaner(80). A component combination state is checked. Infrared energy is detected in the bushing and the elbow connection member by a temperature measuring device(50). The deformation of the bushing and the elbow connection member is checked by a deformation checking unit.

Description

INSPECTION METHOD AND INSPECTION DEVICE FOR A GROUND ELECTRICAL POWER EQUIPMENT}

The present invention relates to a ground power equipment inspection method and inspection apparatus, and more particularly, the ground power equipment inspection method to enable convenient and precise inspection of the bushings and elbow connection material of the ground power equipment using the inspection devices. And an inspection apparatus.

Power facilities, such as transformers and switchgear, are becoming underground so as not to disturb the aesthetics of the city and to impede traffic. Transformers and switchgear, which often require maintenance of underground power facilities, are installed in the form of boxes on the ground so that electricity can be supplied to the demand source.

Ground power equipment 2 such as a ground transformer used for transforming or opening underground lines, as shown in FIGS. 1 and 2, has an intermediate wall in the enclosure 6 with an opening and closing door 4 therebetween. It is divided into a high pressure side wall 8 and a low pressure side wall 10. A plurality of bushings (B) to which the underground cable 12 is connected to the high pressure side wall are installed by the fixed base plate 32.

In addition to the bushing B to which the elbow connecting member L is coupled, the high pressure side wall 8 is provided with a number of parking stands 14 to which the elbow connecting member L is mounted.

The above ground power equipment 2 is provided with an insertion fuse (Bayonet Fuse: F) in which insulating oil is filled to partially insulate each component and the connecting portion and a part of the ground power facility protrudes above the high-pressure side wall (8).

Hereinafter, the ground transformer will be described mainly, but the technical idea of the present invention can be applied to the ground breaker having a similar structure as described above.

The size and position of the bushing B and the parking stand 14 of the ground power equipment 2 such as the ground transformer and the ground breaker are specified by the KEPCO standard. In addition, the low pressure side wall 10 is provided with low pressure terminals 16 of A, B, C, and N poles to supply electricity to each consumer.

The underground cable 12 is connected to the bushing B by the elbow connecting member L as shown in FIGS. 1 and 2.

A contact rod 20 is provided at the center of the elbow connecting member L so as to be electrically connected to the contact terminal 36 in the bushing B. The contact rod 20 is connected to the underground cable 12 through the conductive layer 22 and the crimp terminal 24.

The elbow connecting member L is provided with an insulating layer 26 inside and a shielding layer 28 outside to protect the worker from high voltage electricity.

The elbow connecting member L is provided with a voltage detector 30 so as to check whether or not a load is applied to the elbow connecting member L. FIG.

The underground cable 12 connected to the elbow connecting member L not only supplies a low voltage of electricity to a customer through a transformer (not shown) inside the transformer, but also a loop circuit (not shown) that supplies electricity to a nearby transformer. Unstable).

In addition, a cable 13 for supplying electricity to the low pressure side wall 10 is connected to the low pressure terminal 16.

On the other hand, when cleaning the ground power equipment (2) in the past there is a power failure problem that inconveniences the consumer, there is a inconvenience that can not be timely cleaning.

Accordingly, the bushing B and the elbow connecting member L are left for a long time while the insulating oil leaked from the insertion fuse F is left, so that the bushing B and the elbow connecting member L made of rubber are shown in FIG. As shown in (a) (b), there is a problem of deformation due to the toxicity of insulating oil.

The bushing (B) and the elbow connecting member (L) is deformed by the insulating oil, or when the underground cable (12) is connected when the connection is poor, or the gap (G) is more and more wide open as the vibration continuously from the outside.

The ground power equipment 10 has a problem in that the gap (G) and the deformation part (a) (b) malfunctions when water, dust, and foreign matter flow into the bushing (B) and the elbow connection material (L).

In particular, when moisture enters the bushing (B) and the elbow connection material (L) through the deformation part (a) and the gap (G), the ground power equipment 2 will explode and will not supply electricity due to the explosion. I can't.

Since these ground power facilities (2) are mostly installed around the building in the road, sidewalk and apartment complex there is a problem that causes property loss and casualties when exploded.

That is, the deformed portion (a) and the gap (G) generated in the bushing (B) and the elbow connecting member (L) are unstable between the contact rod (20) provided with the insulator (20a) and the contact terminal (36). It increases the contact resistance and causes a high temperature spark, thereby damaging the insulation of the elbow connecting material (L).

As shown in (c) of FIG. 2, when the contact rod 20 comes into contact with the contact terminal at a contact area S of less than or equal to the allowable reference value, the insulator 20a of the contact rod 20 is burned by a spark. There is a problem that is damaged.

In addition, since the bushing (B) and the elbow connection member (L) are inspected regardless of the influence of ambient temperature, air pressure, humidity, wind, and sunlight, the actual value and the measured value have an error, and the ground power equipment 2 There is a problem that cannot be checked closely.

An object of the present invention is to facilitate the inspection of the ground power equipment in an uninterruptible state and to make the inspection accurate by using the inspection device.

Another object of the present invention is to make it possible to conveniently check the coupling failure of the bushing and the elbow connecting material using a measuring device that is a check device.

Still another object of the present invention is to make it possible to easily check the connection failure of the contact rod by measuring the internal temperature of the bushing and the elbow connecting member by using a temperature measuring device which is a checking device.

Still another object of the present invention is to make it possible to precisely check the deformation state through a method of contacting the bushing and the elbow connecting material to be inspected or by illuminating a laser using a strain checker which is an inspection device.

The present invention for achieving this object includes a basic inspection step for visually checking the coupling and deformation of the bushing and the elbow connecting member in the ground power equipment; A cleaning step of first cleaning the foreign matter on the bushing and the elbow connecting member with a vacuum cleaner after the basic inspection; In the ground power equipment inspection method comprising a component coupling measurement step of checking the component coupling state by measuring the distance from the fixed support plate of the bushing to the tip of the elbow connecting member after the cleaning by a measuring device,

A temperature measuring step of detecting temperature by detecting an infrared energy inside the bushing and the elbow connecting member with a temperature measuring device as a checking device; A deformation checking step of checking deformation by using a deformation checker as a checking device by contacting the external appearance of the bushing and the elbow connecting member or by shining a laser beam; After the deformation check step, characterized in that it further comprises a cleaning step of cleaning with a second cleaner.

After the deformation check step is characterized in that it further comprises a water washing step to wash by spraying the water inside the ground power equipment.

In addition, the present invention is a ground power equipment inspection device that can check the coupling and deformation state of the bushing and elbow connecting member in the ground power equipment using any one of temperature measurement, displacement measurement and reflected light measurement,
The inspection device is connected to a measuring base, a display window for measuring infrared energy measured by the measuring base and displaying a temperature, and a measurement base so as to accurately measure the temperature of a measuring part without being influenced by external temperature. It is characterized in that the temperature measuring instrument having a hollow cylinder of a predetermined length having a close contact hood is installed coupled to the adapter.

The inspection apparatus includes a contactor in contact with a deformation part, a displacement measuring device for measuring a displacement of the contactor, an LED installed while being electrically connected to a computer on the other side of the contactor, and a measurement range to be adjusted on one side of the LED. It is characterized in that it is a contact type strain checker having a setting screw installed, a protective case for protecting the displacement measuring instrument and a handle is formed, and a display plate installed to display the measured value on one side of the displacement measuring instrument.

The inspection apparatus includes a laser measuring instrument that is electrically connected to a computer for illuminating the laser and measuring the reflected light through a window of the measuring instrument case, and a laser type modification having a display plate installed to display the measured value on the upper portion of the measuring instrument case. Characterized in that it is a checker.

According to the present invention, since the bushing and the elbow connecting material can be cleaned with a vacuum cleaner in the uninterrupted state of the ground power equipment, the ground power equipment can be easily cleaned without causing inconvenience to life.

In addition, the measurement of the distance from the fixing base of the bushing to the tip of the elbow connecting member has the effect of quickly checking the coupling failure by using a measuring instrument.

In addition, if the hollow cylinder of a certain length is used in the temperature measuring device when measuring the temperature of the bushing and the elbow connection material, the temperature can be measured accurately without interference from ambient temperature, air pressure, humidity, wind, and sunlight. have.

In addition, since the inspection device checks whether the bushing and the elbow connection member are deformed by contact or non-contact method, there is an effect that can be conveniently checked.

In addition, because the strain checker using a linear variable differential transformer (LVDT) or a laser measuring device checks the bushing and the elbow connection material, there is an effect that can be checked precisely.

1 shows an open ground power installation according to the prior art.
FIG. 2 is a view showing separation and coupling of the elbow connecting member shown in FIG. 1. FIG.
Figure 3 is a block diagram showing a method of checking the elbow connection member of the ground power equipment according to the present invention.
4 is a view showing an inspection process of the elbow connecting member described in FIG.
FIG. 5 is an enlarged view of the cleaner which is the inspection apparatus shown in FIG. 4. FIG.
FIG. 6 is a view showing a measurer which is the inspection device shown in FIG. 4; FIG.
FIG. 7 is a diagram showing a temperature measuring instrument which is a check apparatus shown in FIG. 4. FIG.
8 is a view showing a contact deformation checker which is the inspection device shown in FIG. 4;
FIG. 9 is a view showing a laser deformation checker, which is the inspection device shown in FIG. 4; FIG.

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

In the ground power equipment inspection method according to the present invention, as shown in Figure 3 and 4, after the primary cleaning with a cleaner (80) for accurate inspection in addition to visual inspection, the bushing (B) and the elbow connecting member (L) The measuring device 40 to check the coupling failure of the, the temperature measuring device 50 to measure the temperature by detecting the infrared energy generated inside the bushing (B) and the elbow connecting member (L), and the bushing (B) and elbow connecting member (L) Is checked by using a check device (I) equipped with a strain checker (60) or the like for checking the deformation of the wheel.

After the deformation inspection using the inspection device (I), if the inside of the ground power equipment (2) is washed with a water sprayer and cleaned up to a second time with the vacuum cleaner (80), the bushing (B) and the elbow connecting member (L) Deformation check and cleaning of the above ground power equipment (2) is completed.

As shown in FIG. 5, the cleaner 80 encloses an insulating rod 82 connected to a driving device 83 and a driving device 83 having a suction fan (not shown), and suctions foreign substances 81. Suction tube 84 is formed to form a) and the insulating brush (82B) is installed at the end of the insulating rod (82) to rotate to shake off dust and the like.

The cleaner 80 operates the suction fan installed in the driving device 83, and the electric brush 82B shakes off the dust and foreign matter accumulated in the bushing B and the elbow connecting member L, and the dust and foreign matter are removed from the suction port. Inhaled via 81. Inhaled dust and debris are collected and disposed of.

As shown in FIG. 6, the measurer 40 is made of an insulating material that can withstand special high pressure in the form of vernier calipers.

In the coupling failure check using the measuring device 40, the measuring beacon 41a of the mother 41 is first brought into contact with the fixing base plate 32 of the bushing B, and the measuring beak 42a of the son 42 is connected to the elbow connecting member. If it is located at the tip of (L), the coupling state of the elbow connecting material (L) can be confirmed.

That is, when the measured value checked by the measuring device 40 and the acceptance reference value are compared, the coupling failure of the bushing B and the elbow connecting member L can be easily checked.

As shown in FIG. 7, the temperature measuring device 50 includes a measuring base 51, a display window 52 measuring the infrared energy measured by the measuring base 51, and displaying a temperature, and an influence of an external temperature. It includes a hollow cylinder 55 of a predetermined length having a close contact hood 54 is installed is coupled to the measuring base body 51 to connect the adapter 53 so as to accurately measure the temperature of the measurement site without receiving.

The measuring base 51 is provided with a lens or a detector (not shown) for easily measuring infrared energy.

The hollow cylinder 55 allows the temperature of the bushing B and the elbow connecting member L to be precisely measured without being affected by the external temperature.

The hollow cylinder 55 is provided with a connecting adapter 53 for easy coupling to the measuring base 51 and a close-up hood 54 for close contact with the measurement site.

The hood 54 of the hollow cylinder 55 is brought into close contact with the temperature measuring position of the bushing B and the elbow connecting member L, and the temperature measuring device 50 is operated.

Accordingly, the temperature measuring device 50 accurately measures the temperature by the hollow cylinder 55 without interference of surrounding air temperature, air pressure, humidity, wind, and sunlight.

As shown in FIG. 8, the contact deformation checker 60s using the LVDT includes a contactor 61 in contact with the deformation site, a displacement measuring device 62 that measures the displacement of the contactor 61, and a contactor ( The LED 64 is installed while being electrically connected to the computer 70 on the other side of the 61, the setting screw 66 is installed to adjust the measurement range on one side of the LED 64, and the displacement measuring device 62 ) And a protective case 68 having a handle 67 formed thereon, and a display panel 69 installed to display measured values on one side of the displacement measuring unit 62.

And the setting screw 66 can set the deformation | transmission tolerance reference value of the elbow connection material L. FIG. That is, the LED 64 is turned on if the deformation allowable range, and the LED 64 is turned off when it is out of the deformation allowable range.

The contact deformation checker 60s can measure 1-4 places of the elbow connection material L which is a rubber material so that it may not be pressed. That is, the LED 64 is turned on if the measured value is satisfactory based on the reference value, and the LED 64 is turned off if the measured value is bad based on the reference value.

The contact deformation checker 60s can be inspected by bringing the bushing B and the elbow connecting member L into contact with each other.

The display panel 69 provided in the contact deformation checker 60s may display the measured value digitally or display the decision according to the signal of the computer 70.

Alternatively, a dial gauge (not shown) may be installed and used in the contact deformation checker 60s without being limited to the display panel 69.

In addition, as shown in FIG. 9, the laser deformation checker 60r uses a computer to measure the irradiation of the laser 71 and the reflected light 72 through the window 74 of the measuring device case 73. 70 and a display panel 69 installed to display measurement values on the upper part of the measuring device case 73 and the laser measuring device 75 which is electrically connected to and installed.

The measuring device case 73 can be installed on a tripod 76, so that the deformation of the bushing B and the elbow connecting member L can be conveniently measured.

The laser deformation checker 60r performs zero adjustment of the laser measuring device 75, and then measures 1 to 4 locations of the elbow connecting member L, which is a rubber material, and the computer 70 determines the comparison with the preset reference value. It is displayed on the display panel 69.

If there is no abnormality in the measured value displayed on the display panel 69, the next work is performed.

The deformation checker 60 is displayed on the monitor and the display panel 69 of the computer 70 after judging the comparison with the reference value preset in the computer 70 at the time of inspection.

Hereinafter, the effect | action of this invention made as mentioned above is demonstrated.

First, open and close the door 4 of the ground power equipment 2, which is a ground transformer and a ground breaker, and visually inspects the basic state of the installed bushing B and the elbow connecting member L. (S10)

After the basic inspection of the bushing (B) and the elbow connecting member (L), the dust, spider web, foreign substances, etc. are removed using the cleaner 80. (S20)

Inlet 81 for removing dust and foreign matter on the bushing (B) and the elbow connection material (L) is made of an insulating material can safely clean the ground power equipment even in an uninterrupted state.

After the bushing B and the elbow connecting member L have been cleaned by the cleaner 80, the distance from the fixed base plate 32 of the bushing B to the tip of the elbow connecting member L is measured by the measurer 40. Measure the bonding state. (S30)

That is, when the measuring beacon 41a of the dam 41 is brought into contact with the fixed base plate 32 of the bushing B, and the measuring beak 42a of the son 42 is positioned at the tip of the elbow connecting member L, the elbow connecting member The binding state of (L) can be examined.

After checking the coupling state of the elbow connecting member (L) using the measuring device, the internal temperature is inspected through the infrared energy detected while the temperature measuring device 50 is in close contact with the bushing (B) or the elbow connecting member (L). S40)

When the temperature measuring device 50 is used, the hollow cylinder 55 is assembled to the temperature measuring device 50 using the adapter 53. The hollow cylinder 55 blocks the influence of the ambient temperature around the measurement site so that the temperature can be accurately measured. The hollow cylinder 55 can be brought into close contact with the bushing B or the elbow connecting member L using the hood 54 formed at the tip.

As described above, the measuring device 40 and the temperature measuring device 50 may be used to check whether the coupling of the elbow connecting member L is relaxed or a gap has occurred.

Thereafter, the deformation of the bushing B and the elbow connecting member L to be inspected is checked by the contact deformation checker 60s or the laser deformation checker 60r.

First, in the case of using the contact deformation checker 60s, when the contactor 61 is directly in contact with the bushing and the elbow connecting member L to be inspected, the displacement can be measured. The displacement measured by the contactor 61 can be calculated to check whether the bushing b and the elbow connecting member L are deformed.

That is, when the contact deformation checker 60s using LVDT contacts the bushing and the elbow connecting member L, the computer 70 compares the measured value and the reference value input through the contact. The result calculated by the computer 70 displays on the monitor and display panel 69 whether or not the bushing and the elbow connecting member L are deformed.

Accordingly, when insulating oil leaks through the replacement of the inserted fuse F or the inserted fuse F, the bushing B and the elbow connecting member L insulated with the insulating oil are deformed by the toxicity of the insulating oil.

The bushing B and the elbow connecting member L deformed by the insulating oil can be precisely checked for deformation by using the contact deformation checker 60s.

In addition, in the case of using the laser deformation checker 60r, when the laser beam is reflected on the bushing B and the elbow connecting member L to be inspected and the reflected light is measured, the inspection object can be inspected. It can be easily checked without doing so.

That is, the laser measuring instrument 75 illuminates the inspection portion of the bushing B and the elbow connecting member L in the laser measuring instrument 75, and the laser measuring instrument 75 which recognizes the reflected light is converted into an electric signal. The computer 70 that calculates the electric signal converted by the laser measuring device 75 compares the measured value with the set reference value, and then monitors and displays the monitor and display panel so that an operator can check whether the bushing B and the elbow connecting material L are deformed. 69).

After checking the deformation of the bushing (B) and the elbow connecting material (L) using the deformation checker 60 in the deformation check step (S50) described above, the inside of the ground power equipment 2 is secondarily Clean more.

And after the deformation check step (S50) it can be washed by further performing a water washing step (S51) to spray water into the water sprayer inside the ground power equipment (2). Water washing step (S51) may clean the bushing (B) and the elbow connection material (L) and the like.

50: temperature measuring instrument 51: measuring element
52: Display window 53: Adapter for connection
54: contact hood 55: hollow cylinder
60s: contact strain checker 60r: laser strain checker
61: contact 62: displacement measuring instrument
64: LED 66: setting screw
68: protective case 69: display panel
70: computer 71: laser
72: reflected light 73: measuring instrument case
74: window 75: laser measuring instrument

Claims (5)

A basic inspection step (S10) for visually checking the coupling and deformation of the bushing B and the elbow connecting member L in the ground power installation 2; A cleaning step (S20) of cleaning the foreign matter on the bushing B and the elbow connecting member L after the basic inspection with the cleaner 80; After the cleaning, the component coupling measurement step (S30) of checking the component engagement state by measuring the distance from the fixed support plate 32 of the bushing (B) to the tip of the elbow connecting member (L) by the measuring device (40) as the check device (I) In the ground power equipment inspection method comprising a,
A temperature measuring step (S40) of measuring temperature by detecting infrared energy inside the bushing (B) and the elbow connecting member (L) with a temperature measuring device (50) as a check device;
Deformation check step (S50) to check the deformation with the deformation checker (60) which is the inspection device (I) in contact with the appearance of the bushing (B) and the elbow connecting member (L);
After the deformation check step (S50) and the second step of cleaning with a cleaner (80) (S60) characterized in that it further comprises a ground power equipment check method. The method of claim 1,
After the deformation check step (S50), the ground power equipment check method further comprises a water washing step (S51) to be sprayed and washed with water inside the ground power equipment (2). In the ground power equipment inspection device (I), in which the coupling and deformation of the bushing (B) and the elbow connecting member (L) in the ground power equipment (2) can be checked using any one of temperature measurement, displacement measurement, and reflected light measurement. ,
The inspection device (I),
Measuring body 51, a display window 52 for measuring the infrared energy measured by the measuring body 51 to display the temperature, and a measuring instrument to accurately measure the temperature of the measurement site without being influenced by the external temperature Ground power equipment inspection device, characterized in that the temperature measuring instrument 50 having a hollow cylinder 55 of a predetermined length having a close contact hood 54 is installed to be coupled to the main body 51 by the connecting adapter 53. . The method of claim 3, wherein
The inspection device (I),
A contactor 61 in contact with the deformation part, a displacement measuring device 62 measuring the displacement of the contactor 61, and an LED 64 installed while being electrically connected to the computer 70 on the other side of the contactor 61; , A setting screw 66 installed on one side of the LED 64 to adjust the measuring range, a protective case 68 protecting the displacement measuring device 62, and a handle 67 formed thereon, and the displacement measuring device. And a contact deformation checker (60s) having a display panel (69) installed on one side of the (62) to display measured values. The method of claim 3, wherein
The inspection device (I),
The laser measuring device 75 and the measuring device case 73 which are electrically connected to the computer 70 so that the irradiation of the laser 71 and the reflected light 72 can be measured through the window 74 of the measuring device case 73. The ground power equipment inspection apparatus, characterized in that the laser deformation checker (60r) having a display panel 69 is installed to display the measured value on the top.

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