CN108845234A - Grounded screen condition detecting device and the detection method for applying it - Google Patents

Grounded screen condition detecting device and the detection method for applying it Download PDF

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Publication number
CN108845234A
CN108845234A CN201811030187.4A CN201811030187A CN108845234A CN 108845234 A CN108845234 A CN 108845234A CN 201811030187 A CN201811030187 A CN 201811030187A CN 108845234 A CN108845234 A CN 108845234A
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CN
China
Prior art keywords
grounded screen
magnetic
roll bending
plastic roll
condition detecting
Prior art date
Application number
CN201811030187.4A
Other languages
Chinese (zh)
Inventor
梅红伟
李宗�
王黎明
Original Assignee
清华大学深圳研究生院
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 清华大学深圳研究生院 filed Critical 清华大学深圳研究生院
Priority to CN201811030187.4A priority Critical patent/CN108845234A/en
Publication of CN108845234A publication Critical patent/CN108845234A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks

Abstract

The present invention provides a kind of grounded screen condition detecting device, and for detecting electric power pylon connecting state of grounding network, the grounded screen condition detecting device includes magnetic plastic roll bending, power supply module and magnetic stripe;The present invention also provides a kind of detection methods of grounded screen detection device described in application, using electrical conductor to the absorption principle of magnetic powder, the grounded screen for forming current distribution generates suction-operated to the magnetic powder in suspension inside the magnetic plastic roll bending seal chamber, develop the color situation for the observation magnetic plastic roll bending upper surface, and the place for white lines occur illustrates that there are grounding grids immediately below corresponding magnetic plastic roll bending.Device and method of the present invention are operated convenient for experiment operator, it can be achieved that in the case where not excavating grounded screen, fast and accurately detect grounded screen position, network and fracture defect.

Description

Grounded screen condition detecting device and the detection method for applying it

Technical field

The present invention relates to a kind of detection technique field more particularly to a kind of grounded screen condition detecting device and using its inspection Survey method.

Background technique

Currently, being proposed more with the continuous improvement of domestic transmission line of electricity voltage class to the safe operation of electric system High requirement.And wherein, iron tower of power transmission line ground integrity operates normally a weight of reliability as electric system is influenced Factor is wanted to attract wide attention, in electric power pylon, grounded screen is often used as the critical facility of Lighting Protection Measures, power transmission line Can road lightning protection play a role, and depend primarily on the performance quality of steel tower earthing or grounding means.Electric system mostly uses greatly common zinc-plated Pressure conductor of the carbon steel as grounded screen, using zinc-coated flat steel sheet or angle steel by the way that grounded screen is formed by welding and is buried in ground. But since the burn into earth current of construction technology defect and metal in the soil is to the electrodynamic action of grounding grids Etc. factors, cause the ground connection diffusing performance of steel tower grounded screen to be locally deteriorated.

At this stage, steel tower grounded screen drawing often goes out the phenomenon that active, often through the ground connection of measurement steel tower grounded screen Resistance judges the quality of steel tower grounded screen performance.But the ground resistance of steel tower grounded screen cannot judge that steel tower grounded screen is broken Location of fault.

Summary of the invention

In view of this, it is necessary to provide a kind of simple, quick detection steel tower grounded screen sub-surface conductors position and networks Detection device and application its detection method.

The present invention provides a kind of grounded screen condition detecting device, described for detecting electric power pylon connecting state of grounding network Grounded screen condition detecting device include magnetic plastic roll bending, power supply module and magnetic stripe, the magnetic plastic roll bending includes more A compact arranged seal chamber, each seal chamber are independent space, keep sealing each other, each of described close Seal intracavitary filling suspending liquid.

It further, include magnetic powder, white oil, titanium dioxide in the suspension, the magnetic powder is by ferriferrous oxide material It magnetizes.

Further, the magnetic powder is black, and the dispersed-powder is distributed in the suspension, the magnetic Powder can move in the suspension under the magnetic force.

Further, the power supply module includes power supply, two power leads, two electricity folders and is serially connected with a wherein electricity Switch on the conducting wire of source, the two described power lead one end are connected to the positive and negative anodes of power supply, and the other end is connected to It is described two electricity folder in one of them.

Further, the seal chamber at least side is made of transparent material, and the magnetic plastic roll bending is flexible material Material is made.

Further, the seal chamber is in honeycomb structure.

The present invention also provides a kind of detection method of grounded screen condition detecting device described in application, the method and step It is as follows:

S1 disconnects two lower guide body lines between the grounded screen and the electric power pylon, and in the ground connection Two contacts that are electrically connected are formed on the net;

At least one described magnetic plastic roll bending is laid in around the electric power pylon by S2, covers the grounded screen Area to be tested;

S3 carries out magnetically attractive clearing processing to magnetic plastic roll bending upper surface;

The power supply module is serially connected with described two contacts that are electrically connected by S4 respectively;

S5, setting size of current are aA, and energization disconnects the power supply module switch after t seconds;

S6 determines the state of the grounded screen according to the colour developing situation of the magnetic plastic roll bending.

Further, the detection method of the grounded screen state measurement equipment further includes:According to the magnetic plastic roll bending Colour developing situation draw the grounded screen grid chart, the grid chart is with described two contacts that are electrically connected in the magnetic plastic film The line between subpoint on plate establishes rectangular co-ordinate using subpoint described in one of them as coordinate origin as X-axis System.

Further, the magnetically attractive clearing processing method of the detection method step 3 of the grounded screen condition detecting device is: The upper surface that magnetic stripe is placed in the magnetic plastic roll bending is mobile, and the magnetic powder is attracted by magnetic stripe to the magnetic plastic film Plate upper surface is mobile, until magnetically attractive clearing processing is completed in the magnetic plastic roll bending upper surface when black is all presented.

Further, the electric current of the detection method step 5 of the grounded screen condition detecting device is direct current, The range of a is 10~20A, and the range of the t is 5~10s.

Grounded screen condition detecting device provided by the invention and application its detection method using electrical conductor to magnetic powder Grounded screen two lower guide body lines are accessed direct currents by absorption principle, form the grounded screen of current distribution to being covered in earth's surface Magnetic powder in the magnetic plastic roll bending suspension of side generates suction-operated, and white occurs in observation magnetic plastic roll bending colour developing situation The place of striped illustrates that there are grounding grids immediately below corresponding magnetic plastic roll bending, show the place of black, illustrate to correspond to Magnetic plastic roll bending immediately below no ground net conductor or this section of conductor be broken.Method and apparatus provided by the invention is convenient for Experiment operator operation can be realized in the case where not excavating grounded screen and fast and accurately detect grounded screen position, grid Structure and fracture defect.

Detailed description of the invention

Fig. 1 is the magnetic plastic roll bending structural schematic diagram in one embodiment of the invention.

Fig. 2 is the signal of the detection method using the grounded screen condition detecting device in one embodiment of the invention Figure.

Fig. 3 is that the effect of the detection method using the grounded screen condition detecting device in one embodiment of the invention is shown It is intended to.

Fig. 4 is that the process of the detection method using the grounded screen condition detecting device in one embodiment of the invention is shown It is intended to.

Main element symbol description

The present invention that the following detailed description will be further explained with reference to the above drawings.

Specific embodiment

In order to be more clearly understood that the above objects, features, and advantages of the embodiment of the present invention, with reference to the accompanying drawing and The present invention will be described in detail for specific embodiment.It should be noted that in the absence of conflict, the embodiment party of the application Feature in formula can be combined with each other.

Embodiment in the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, described reality The mode of applying is some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ability Domain those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention The range of embodiment protection.

Unless otherwise defined, all technical and scientific terms used herein and the technology for belonging to the embodiment of the present invention The normally understood meaning of the technical staff in field is identical.Term as used herein in the specification of the present invention is intended merely to The purpose of specific embodiment is described, it is not intended that in the limitation embodiment of the present invention.

Grounded screen condition detecting device 200 in an embodiment of the present invention includes magnetic plastic roll bending 100, power supply module 50 and magnetic stripe (not shown).The grounded screen condition detecting device 200 is used for the case where not excavating grounded screen 30 Under, realize the circuit network and energization situation for fast and accurately detecting 30 area to be tested of grounded screen.

Referring to Fig. 1, Fig. 1 is 100 structural schematic diagram of magnetic plastic roll bending in an embodiment of the present invention, institute The magnetic plastic roll bending 100 stated includes multiple compact arranged seal chambers 10, and in the present embodiment, the seal chamber 10 is in Honeycomb structure, in other embodiments of the present invention, the cross section of 10 structure of seal chamber is circle, rectangle, polygon Shape or other shapes.Each seal chamber 10 is independent space, keeps sealing each other.Each seal chamber Filling suspending liquid 20 in 10 include magnetic powder, white oil, titanium dioxide in the suspension 20, in other embodiments of the present invention, It is not excluded for also being included as the other compositions realizing certain specific function and adding, or substitution ingredient in the suspension 20.Its In, the magnetic powder is magnetized by ferriferrous oxide material, can be moved under the magnetic force, and the magnetic powder is not being received In the case where magnetic-adsorption, it is uniformly distributed in the suspension 20.In the present embodiment, the magnetic powder is black Color can also select other color magnetic powders in other embodiments of the present invention.At least side of seal chamber 10 is transparent Material is made, specifically, at least seal chamber 10 of one side in the upper and lower surfaces of the magnetic plastic roll bending 100 Material is all transparent material, and the magnetic plastic roll bending 100 is in use, select transparent side as the magnetic plastic roll bending Upper surface, in order to observe change in location of the magnetic powder in the suspension 20.The magnetic plastic roll bending 100 are fabricated from a flexible material, in order to carry.

Also referring to Fig. 1 and Fig. 2, the power supply module 50 includes the power lead 503, two of power supply 501, two electricity Folder (not shown) and the switch 502 being serially connected on a wherein power lead, two described 503 one end of power lead are separately connected In the positive and negative anodes of power supply 501, the other end is connected to one of them in the electricity folder (not shown), the switch 502 For controlling electric current output, the electricity folder (not shown) is used to clamp the grounded screen 30.In the present embodiment, described Power supply module 50 be DC power supply, the power supply module 50 has two kinds of constant current, constant pressure output modes, and both of which It can free switching;In addition, the power supply module 50 has overcurrent, overheat, over-voltage multiple protective circuit, meets the present invention and carry out Grounded screen detection needs.Exist in present embodiment, the output size of current range is 10~20A, and conduction time maintains 5 ~10s generates damage to the grounded screen 30 to prevent overlong time.

Several lower guide body lines 301, institute are connected between the grounded screen 30 and the electric power pylon (not shown) The lower guide body line 301 stated can be power transmission line, or draw what thunder equipment (lightning conducter, lightning rod etc.) was connected with grounding body Mainly there are independent grounding downlead, the reinforcing bar of steel reinforced concrete pole, shaft tower steel etc. in part for shaft tower.The grounded screen Condition detecting device 200 under two between the grounded screen 30 and the electric power pylon (not shown) in use, by drawing Conductor lines 301 disconnect, and in forming two contacts 302 that are electrically connected in the grounded screen 30, by the magnetic plastic described at least one The area to be tested of the tiling covering of film plate 100 grounded screen 30, with magnetic stripe (not shown) to the magnetic plastic film Plate 100 carries out magnetically attractive clearing processing, makes the upper surface of the magnetic plastic roll bending 100 that black all be presented.By described two Power lead 503 is connected to the contact 302 that is wherein electrically connected described in one, and the grounded screen condition detecting device 200 is made to go here and there It is connected in the grounded screen 30.Setting output DC current size is aA, and the range of a is 10~20A, described in closure Switch 502, energization disconnects the switch 502 after t seconds, the range of the t is 5~10s.The observation magnetic plastic The colour developing situation of roll bending 100 is recorded the colour developing situation of the magnetic plastic roll bending 100 accordingly, and is drawn according to colour developing situation The energization grid chart of the corresponding grounded screen 30.Specifically, the grid chart is with described two contacts 302 that are electrically connected Line between the subpoint on the magnetic plastic roll bending 100 as X-axis, using the subpoint described in one of them as Coordinate origin establishes rectangular coordinate system, and the region of white lines 60 is presented on the magnetic plastic roll bending 100 to using solid line It draws, indicates that the corresponding grounded screen 30 in the region is energized state, the region of display black shading 70 is drawn with dotted line Or do not draw, it is disconnected to illustrate that the region occurs without 30 electrical conductor of grounded screen described in the corresponding grounded screen 30 or this section It splits.

Referring to Fig. 2, Fig. 2 be an embodiment of the present invention in actually detected schematic diagram, the grounded screen 30 be to Detection zone, the grounded screen 30 are embedded under ground surface 40, and the magnetic plastic roll bending 100 is laid in the ground surface On 40, the magnetic plastic roll bending 100 is made to cover the area to be tested of the grounded screen 30.

Referring to Fig. 3, Fig. 3 is the effect diagram in an embodiment of the present invention, Fig. 3 A is to handle by magnetically attractive clearing The colour developing situation of the magnetic plastic roll bending 100 afterwards, the upper surface of the magnetic plastic roll bending 100 is all shown as described Black shading 70.Fig. 3 B is the colour developing situation of magnetic plastic roll bending 100 described after the grounded screen 30 is powered:Described in appearance The place of white lines 60 illustrate that there are the grounded screens 30 to lead immediately below the corresponding magnetic plastic roll bending 100 Body, and there is no fractures for 30 conductor of grounded screen described in this section;The place of the display black shading 70, illustrates corresponding It is broken immediately below the magnetic plastic roll bending 100 without 30 conductor of grounded screen or this section of conductor.

Referring to Fig. 4, Fig. 4 is one of an embodiment of the present invention application grounded screen condition detecting device The flow diagram of detection method.This method specifically includes following steps:

S1 disconnects two lower guide body lines 301 between the grounded screen 30 and the electric power pylon (not shown), and In two contacts 302 that are electrically connected of formation in the grounded screen 30.

In the present embodiment, the lower guide body line 301 is to draw the part that thunder equipment is connected with grounding body, to transmission of electricity Mainly there are independent grounding downlead, the reinforcing bar of steel reinforced concrete pole, shaft tower steel etc. for steel tower.

At least one described magnetic plastic roll bending 100 is laid in around the electric power pylon (not shown) by S2, covers institute State the area to be tested of grounded screen 30.

S3 carries out magnetically attractive clearing processing to 100 upper surface of magnetic plastic roll bending.

In the present embodiment, the magnetically attractive clearing processing method is:Magnetic stripe (not shown) is placed in the magnetic plastic The upper surface of roll bending 100 is mobile, and the magnetic powder is attracted by magnetic stripe to 100 upper surface of the magnetic plastic roll bending movement, until institute Magnetically attractive clearing processing is completed when black is all presented in 100 upper surface of magnetic plastic roll bending stated.

The power supply module 50 is serially connected with described two contacts 302 that are electrically connected by S4 respectively.

In the present embodiment, the series-mounting is:By the electricity folder (not shown) point of two power leads 503 Two contacts 302 that are electrically connected are not clamped.

S5, setting size of current are aA, and energization disconnects the switch 502 after t seconds.

In the present embodiment, the electric current is DC current, and the range of the t is 5~10s, and the range of a is 10 ~20A.

S6 determines the state of the grounded screen 30 according to the colour developing situation of the magnetic plastic roll bending 100.

S7, according to the colour developing situation of the magnetic plastic roll bending 100 draw grounded screen 30 grid chart, the grid chart with Described two lines of the contact 302 between the subpoint on the magnetic plastic roll bending 100 that are electrically connected are as X-axis, with wherein one A subpoint establishes rectangular coordinate system as coordinate origin.

Specifically, the region that white lines 60 is presented on the magnetic plastic roll bending 100 indicates to be somebody's turn to do to depicted as solid lines is applied The corresponding grounded screen 30 in region is energized state, shows that the region of black shading 70 is drawn or do not drawn, explanation with dotted line The region is broken without the corresponding grounded screen 30 or this section of 30 conductor of grounded screen.

In the present embodiment, when the grounded screen 30 accesses electric current, the magnetic powder is powered by the grounded screen 30 The attraction of conductor, the magnetic powder in the suspension 20 above 30 electrical conductor of grounded screen can be by table on the suspension 20 It is mobile towards the 30 electrical conductor direction of grounded screen, the white lines is formed in 100 upper surface of magnetic plastic roll bending 60.Embodiment of above is only to illustrate the technical solution of the embodiment of the present invention rather than limits, although preferably implementing referring to above The embodiment of the present invention is described in detail in mode, those skilled in the art should understand that, it can be to of the invention real The technical solution for applying example is modified or equivalent replacement should not all be detached from the embodiment of the present invention technical solution spirit and scope.

Claims (10)

1. a kind of grounded screen condition detecting device, for detecting electric power pylon connecting state of grounding network, which is characterized in that described Grounded screen condition detecting device includes magnetic plastic roll bending, power supply module and magnetic stripe, and the magnetic plastic roll bending includes multiple Compact arranged seal chamber, each seal chamber are independent space, keep sealing, each sealing each other Intracavitary filling suspending liquid.
2. grounded screen condition detecting device according to claim 1, which is characterized in that include magnetic in the suspension Powder, white oil, titanium dioxide, the magnetic powder are magnetized by ferriferrous oxide material.
3. grounded screen condition detecting device according to claim 2, which is characterized in that the magnetic powder is black, described Dispersed-powder be distributed in the suspension, the magnetic powder can move in the suspension under the magnetic force It is dynamic.
4. grounded screen condition detecting device according to claim 1, which is characterized in that the power supply module includes electricity Source, two power leads, two switches electricity folder and be serially connected on a wherein power lead, the two described power lead one end The positive and negative anodes of power supply are connected to, the other end is connected to one of them in described two electricity folders.
5. grounded screen condition detecting device according to claim 1, which is characterized in that the seal chamber at least side is Transparent material is made, and the magnetic plastic roll bending is made of flexible material.
6. grounded screen condition detecting device according to claim 1, which is characterized in that the seal chamber is in honeycomb knot Structure.
7. a kind of detection method for applying the grounded screen condition detecting device as described in any one of claims 1 to 6, special Sign is that the method and step is as follows:
S1 disconnects two lower guide body lines between the grounded screen and the electric power pylon, and in shape in the grounded screen At two contacts that are electrically connected;
At least one described magnetic plastic roll bending is laid in around the electric power pylon, covers the to be checked of the grounded screen by S2 Survey region;
S3 carries out magnetically attractive clearing processing to magnetic plastic roll bending upper surface;
The power supply module is serially connected with described two contacts that are electrically connected by S4 respectively;
S5, setting size of current are aA, and energization disconnects the power supply module switch after t seconds;
S6 determines the state of the grounded screen according to the colour developing situation of the magnetic plastic roll bending.
8. the detection method of grounded screen condition detecting device according to claim 7, which is characterized in that the method is also Including:The grounded screen grid chart is drawn according to the colour developing situation of the magnetic plastic roll bending, the grid chart is with described two Line of the contact between the subpoint on the magnetic plastic roll bending be electrically connected as X-axis, is made with subpoint described in one of them For coordinate origin, rectangular coordinate system is established.
9. the detection method of grounded screen condition detecting device according to claim 7, which is characterized in that the step 3 Magnetically attractive reset processing method be:The upper surface that magnetic stripe is placed in the magnetic plastic roll bending is mobile, and the magnetic powder is inhaled by magnetic stripe It is mobile to guide magnetic plastic roll bending upper surface into, until magnetically attractive is completed when black is all presented in magnetic plastic roll bending upper surface Clearing processing.
10. the detection method of grounded screen condition detecting device according to claim 7, which is characterized in that the step 5 Electric current be direct current, the range of a is 10~20A, and the range of the t is 5~10s.
CN201811030187.4A 2018-09-05 2018-09-05 Grounded screen condition detecting device and the detection method for applying it CN108845234A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2077547U (en) * 1990-04-24 1991-05-22 山西省电力公司大同第一热电厂 Displaying board of magnetic detector of defects
CN102628903A (en) * 2012-04-19 2012-08-08 河北省电力公司超高压输变电分公司 Method for detecting conductor position and grid structure of transformer station grounding network
CN203858320U (en) * 2014-06-09 2014-10-01 国家电网公司 Grounding grid corrosion and breakpoint detection system based on threshold value comparison
US20150022216A1 (en) * 2013-07-18 2015-01-22 San Diego Gas & Electric company c/o Sempra Energy Ground potential rise with depth sensing
CN105158643A (en) * 2015-09-24 2015-12-16 国网山西省电力公司临汾供电公司 Remote control detecting device for corrosion state of grounding grid horizontal voltage-sharing conductor of substation
CN108120763A (en) * 2017-11-27 2018-06-05 江阴市永兴机械制造有限公司 A kind of high-frequency impulse magnetic powder inspection method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2077547U (en) * 1990-04-24 1991-05-22 山西省电力公司大同第一热电厂 Displaying board of magnetic detector of defects
CN102628903A (en) * 2012-04-19 2012-08-08 河北省电力公司超高压输变电分公司 Method for detecting conductor position and grid structure of transformer station grounding network
US20150022216A1 (en) * 2013-07-18 2015-01-22 San Diego Gas & Electric company c/o Sempra Energy Ground potential rise with depth sensing
CN203858320U (en) * 2014-06-09 2014-10-01 国家电网公司 Grounding grid corrosion and breakpoint detection system based on threshold value comparison
CN105158643A (en) * 2015-09-24 2015-12-16 国网山西省电力公司临汾供电公司 Remote control detecting device for corrosion state of grounding grid horizontal voltage-sharing conductor of substation
CN108120763A (en) * 2017-11-27 2018-06-05 江阴市永兴机械制造有限公司 A kind of high-frequency impulse magnetic powder inspection method

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