CN210037979U - Simple testing device for grounding resistance of distribution transformer - Google Patents
Simple testing device for grounding resistance of distribution transformer Download PDFInfo
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- CN210037979U CN210037979U CN201920413216.9U CN201920413216U CN210037979U CN 210037979 U CN210037979 U CN 210037979U CN 201920413216 U CN201920413216 U CN 201920413216U CN 210037979 U CN210037979 U CN 210037979U
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- 238000012360 testing method Methods 0.000 title claims abstract description 37
- 238000013016 damping Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- -1 Super P Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000002134 carbon nanofiber Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
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Abstract
The utility model relates to a testing arrangement especially relates to a join in marriage simple and easy testing arrangement of transformer ground resistance. It includes: a wire wheel disc and a simple grounding post; a lead with two ends capable of being stretched and provided with conductive chucks is arranged in the lead wheel disc, and one end of the lead is connected with the simple grounding column; the simple grounding column is hollow, an opening at the upper part of an inner cavity of the simple grounding column is a wire access port, the bottom end of the inner cavity of the simple grounding column is sealed, and the simple grounding column is divided into an insulating section at the upper part and a conductive section at the lower part; the conductive section is provided with a pinhole; a conductive diaphragm is arranged in the inner cavity of the conductive section, and a conductive needle and a conductive base which are matched with each other are arranged on the surface of the conductive diaphragm; one end of the conductive needle is fixedly connected with the conductive diaphragm through the conductive base, and the other end of the conductive needle is positioned in the pinhole; and the conductive needle penetrates through the conductive diaphragm to be outwardly pierced after the diaphragm is opened. The utility model is flexible and convenient to install and use, and has extremely high portability compared with the existing testing device and testing method; the device has strong universality and can be used in most cases.
Description
Technical Field
The utility model relates to a testing arrangement especially relates to a join in marriage simple and easy testing arrangement of transformer ground resistance.
Background
Many electrical devices require a reliable ground connection and have stringent requirements on the ground resistance of the grounding device, including functional grounding, protective grounding, anti-induced voltage grounding, and anti-lightning grounding. Therefore, whether the grounding resistance of the grounding device is qualified or not directly affects the safe and stable operation of the electrical equipment, and the grounding resistance of the grounding device needs to be tested periodically, especially when new equipment is put into operation.
If the grounding resistance of the grounding device needs to be tested in the daily maintenance process, the grounding device needs to be tested after power failure in many times, and a grounding electrode needs to be arranged at a far position in the testing process, so that the testing is very inconvenient, and a simple grounding resistance testing method needs to be found.
The invention discloses a device and a method for measuring the grounding resistance of a flexible graphite grounding body and accelerating corrosion test, as disclosed in 2018, 11, 20.A patent application publication number is CN108845185A, and the device comprises a containing barrel, wherein a stainless steel foil is arranged in the containing barrel, the stainless steel foil bears a corrosion medium, a flexible graphite grounding electrode is embedded in the corrosion medium, the end part of the flexible graphite grounding body is connected with one end of a lead, a precise ammeter and a variable standard resistor are connected in series outside the containing barrel in a conducting way, then the constant voltage source and an alternating current power supply are connected in parallel, a switch element is connected, and the other end of the lead is connected with the stainless steel foil to form a loop. This can indeed produce good test results, but its applicability is poor, and the equipment setup is cumbersome.
Disclosure of Invention
Need have a power failure to equipment and shut down, set up the loaded down with trivial details scheduling problem of process when solving current test earthing device's ground resistance, the utility model provides a join in marriage and become simple and easy testing arrangement of ground resistance. It mainly realizes the following several purposes: the test convenience of the distribution grounding resistance is improved, and the power is not required to be shut down and cut off during the test; secondly, the flexibility of the test is improved through the device, so that the device has stronger universality; and thirdly, the safety of the test process is ensured, and potential safety hazards are reduced.
In order to achieve the above purpose, the utility model adopts the following technical scheme.
A simple testing device for distribution transformer grounding resistance comprises:
a wire wheel disc and a simple grounding post;
a lead with two ends capable of being stretched and provided with conductive chucks is arranged in the lead wheel disc, and one end of the lead is connected with the simple grounding column;
the simple grounding column is hollow, an opening at the upper part of an inner cavity of the simple grounding column is a wire access port, the bottom end of the inner cavity of the simple grounding column is sealed, and the simple grounding column is divided into an insulating section at the upper part and a conductive section at the lower part;
the conductive section is provided with a pinhole;
a conductive diaphragm is arranged in the inner cavity of the conductive section, and a conductive needle and a conductive base which are matched with each other are arranged on the surface of the conductive diaphragm;
one end of the conductive needle is fixedly connected with the conductive diaphragm through the conductive base, and the other end of the conductive needle is positioned in the pinhole;
and the conductive needle penetrates through the conductive diaphragm to be outwardly pierced after the diaphragm is opened.
Preferably, the upper end of the conductive diaphragm in the inner cavity of the simple grounding column is also provided with a conductive core column, and the conductive core column is provided with a conductive joint for connecting a conductive chuck; the side wall of the conductive core column is provided with an insulating handle which penetrates out of the side wall of the insulating section of the simple grounding column to form a holding part, and the side surface of the insulating section is correspondingly provided with an opening which is matched with the holding part of the insulating handle to move; the conductive core column can be driven to move up and down through the holding part.
Preferably, the upper end of the conductive diaphragm is opened to form a diaphragm opening which is fixedly connected with the side wall of the inner cavity of the simple grounding post; the lower end of the conductive core column is aligned with the diaphragm opening.
Preferably, the simple distribution transformer grounding resistance testing device further comprises a middle-range bracket.
Preferably, the middle-range bracket comprises a stringing head, a connecting rod and a chassis; the stringing head, the connecting rod and the chassis are insulated.
Preferably, the stringing head is provided with a stringing hole for passing a wire; two ends of the stringing hole are opened, and the opening is rounded; anti-skid teeth are arranged at two ends of the stringing hole close to the opening.
Preferably, the upper end of the connecting rod is fixedly connected with the bottom end of the stringing head; the lower end of the connecting rod is rotatably connected with the chassis through a damping bearing.
The utility model has the advantages that:
1) the device is flexible and convenient to install and use, and has extremely high portability compared with the existing testing device and testing method;
2) the device has strong universality and can be used in most cases;
3) through the reasonable setting of structure, reduce the potential safety hazard, it is safer to use.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic cross-sectional view of a simple grounding stud;
FIG. 3 is a schematic view of portion A of FIG. 2;
FIG. 4 is a schematic cross-sectional view of a wire sheave;
FIG. 5 is a schematic cross-sectional view of a mid-range stent;
in the figure: the device comprises a simple grounding post 1, an insulating section 11, a conductive section 12, a conductive diaphragm 13, a conductive core column 14, a conductive joint 141, an insulating handle 15, a holding part 16, a pinhole 17, a conductive needle 18, a conductive base 19, a wire wheel disc 2, a wire 21, a conductive chuck 22, a middle-range support 3, a wire stringing head 31, a wire stringing hole 311, a chamfer 312, an anti-skidding tooth 313, a connecting rod 32, a chassis 33, a damping bearing 34 and a grounding device to be tested 4.
Detailed Description
The invention is described in further detail below with reference to specific embodiments and drawings. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Moreover, references to embodiments of the invention in the following description are generally only to be considered as examples of the invention, and not as all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.
Examples
A simple testing device for distribution transformer grounding resistance comprises:
the simple grounding column 1 plays a role of a movable grounding electrode, and the simple grounding column 1 and the lead wheel disc 2 form a closed conductive loop through the ground;
a lead 21 is wound in the lead wheel disc 2, two ends of the lead 21 can be pulled out, conductive chucks 22 are arranged at two ends of the lead 21, two ends of the lead 21 are respectively connected with the grounding device to be tested 4 and the simple grounding column 1, and the two ends of the lead 21 can also be directly connected with the two grounding devices to be tested 4 for measurement;
the outer side of the lead 21 is coated with insulating glue or other common insulating materials, the inner core of the lead 21 is connected with the conductive chuck 22, and the outer side of the conductive chuck 22 is also coated with insulating glue or other common insulating materials;
the simple grounding post 1 is hollow, and an opening at the upper part of an inner cavity of the simple grounding post is a lead 21 access port and the bottom end of the simple grounding post is sealed;
the simple grounding pole 1 is further divided into a conductive section 12 and an insulating section 11, the conductive section 12 is arranged at the lower end of the insulating section 11 and is inserted underground, and the conductive section 12 and the insulating section 11 are connected in a seamless mode;
the simple grounding pole 1 can be distinguished by coating insulating paint on the surface of a conductive metal material and not coating the insulating paint;
the outer surface of the conductive section 12 is provided with a conductive protective layer;
the simple grounding post 1 is characterized in that uniform and dense pinholes 17 are arranged on the surface of the conductive section 12, and the pinholes 17 are through holes;
the aperture of the pinhole 17 is less than or equal to 1mm, so that soil can be effectively prevented from entering the simple grounding column 1;
the inner cavity of the conductive section 12 of the simple grounding post 1 is provided with a conductive diaphragm 13 with high elasticity, high toughness and good conductivity;
the conductive diaphragm 13 can be a high-elasticity high-toughness diaphragm modified by acetylene black, Ketjen black, Super P, vapor-grown carbon fiber and the like;
the inner cavity of the insulation section 11 at the upper end of the conductive diaphragm 13 is provided with a conductive core column 14, the upper end of the conductive core column 14 is provided with a conductive joint 141, and the conductive joint 141 is used for being clamped by matching with a conductive chuck 22 so that the conductive core column 14 is connected with the lead 21;
the side of the conductive core column 14 is provided with an insulating handle 15, the insulating handle 15 penetrates out of the side of the insulating section 11 of the conductive core column 14 to form a holding part 16, the side of the insulating section 11 is correspondingly provided with an opening matched with the insulating handle 15 to hold the holding part 16, and a user can drive the conductive core column 14 in the inner cavity to move up and down through the holding part 16.
The upper end of the conductive diaphragm 13 is opened to form a diaphragm opening, the opening faces the conductive core column 14 and is fixedly connected with the side wall of the inner cavity of the simple grounding column 1, and the lower end of the conductive diaphragm 13 is folded;
the outer surface of the conductive diaphragm 13 is provided with a conductive base 19 and conductive needles 18, the number of the conductive base 19, the number of the conductive needles 18 and the number of the pinholes 17 of the simple grounding post 1 are equal, the conductive base 19 and the conductive needles 18 are matched with each other, one end of each conductive needle 18 is fixedly arranged on the outer surface of the conductive diaphragm 13 through one conductive base 19, and the other end of each conductive needle is just positioned in the pinhole 17;
the conductive core column 14 is inserted into the conductive diaphragm 13 downwards to prop the conductive diaphragm 13 open, the conductive needle 18 is inserted out of the simple grounding column 1 from the pinhole 17 under the limit of the pinhole 17, and the contact area of the simple grounding column 1 and soil and the installation stability of the simple grounding column 1 are greatly improved.
The simple testing device for the distribution transformer grounding resistance further comprises a middle-range bracket 3, and the middle-range bracket 3 supports the middle-section lead 21 when the lead 21 is erected in a long distance, so that the lead 21 is prevented from falling down, and potential safety hazards are reduced;
the middle-range bracket 3 comprises a stringing head 31, a connecting rod 32 and a chassis 33;
the stringing head 31, the connecting rod 32 and the chassis 33 are all made of insulating materials.
The stringing head 31 is provided with a through hole type stringing hole 311, and the stringing hole 311 is used for passing through a conducting wire 21;
the openings at the two ends of the wire hole 311 are chamfered 312 to prevent the insulation sheet outside the lead 21 from being worn;
the stringing head 31 is of a flip open-close type, which is convenient for installing the lead 21;
the upper end of the connecting rod 32 is fixedly connected with the bottom of the stringing head 31, and the lower end of the connecting rod 32 is rotatably connected with the chassis 33;
the connecting rod 32 and the chassis 33 are rotatably connected through a damping bearing 34, the chassis 33 can rotate in a certain range around the damping bearing 34 after being connected through the damping bearing 34 and keep stable after rotating, angle adjustment is achieved, and the chassis is further convenient to use on slopes and the like.
When in use:
firstly, searching a prescription in a proper range of a grounding device 4 to be tested, conveniently inserting a test point of a simple grounding column 1, firstly, gradually stretching a second end of a lead 21 to be near the grounding device 4 to be tested, in the process, if the distance is too far, and the influence of environmental factors such as slopes and puddles exists in the process, properly erecting a middle-range bracket 3 to support the lead 21, finally, tensioning the lead 21, carefully connecting a first end of the lead 21 to the grounding device 4 to be tested, then pulling out a second end of the lead 21 in a lead wheel disc 2, clamping a conductive chuck 22 at the end to a conductive joint 141 at the upper end of a conductive core column 14 in an inner cavity of the simple grounding column 1 to form connection, then inserting the simple grounding column 1 into the test point, but not inserting the test point firstly and then connecting the simple grounding column 1 to avoid the danger of electric shock, electric leakage and the like, and finally, moving the conductive core column 14 downwards through an insulating handle 15 to, and (3) inserting the conductive pin 18 into the test point soil through the pin hole 17, forming a closed loop by the grounding device 4 to be tested and the simple grounding column 1 through the ground, and detecting through a clamp type grounding resistance tester.
Claims (7)
1. The utility model provides a join in marriage simple and easy testing arrangement of transformer ground resistance which characterized in that includes:
a wire wheel disc and a simple grounding post;
a lead with two ends capable of being stretched and provided with conductive chucks is arranged in the lead wheel disc, and one end of the lead is connected with the simple grounding column;
the simple grounding column is hollow, an opening at the upper part of an inner cavity of the simple grounding column is a wire access port, the bottom end of the inner cavity of the simple grounding column is sealed, and the simple grounding column is divided into an insulating section at the upper part and a conductive section at the lower part;
the conductive section is provided with a pinhole;
a conductive diaphragm is arranged in the inner cavity of the conductive section, and a conductive needle and a conductive base which are matched with each other are arranged on the surface of the conductive diaphragm;
one end of the conductive needle is fixedly connected with the conductive diaphragm through the conductive base, and the other end of the conductive needle is positioned in the pinhole;
and the conductive needle penetrates through the conductive diaphragm to be outwardly pierced after the diaphragm is opened.
2. The simple testing device for the grounding resistance of the distribution transformer of claim 1, wherein a conductive core column is further arranged at the upper end of the conductive diaphragm in the inner cavity of the simple grounding column, and the conductive core column is provided with a conductive joint for connecting a conductive chuck; the side wall of the conductive core column is provided with an insulating handle which penetrates out of the side wall of the insulating section of the simple grounding column to form a holding part, and the side surface of the insulating section is correspondingly provided with an opening which is matched with the holding part of the insulating handle to move; the conductive core column can be driven to move up and down through the holding part.
3. The simple testing device for the distribution transformer grounding resistance according to claim 2, wherein the upper end of the conductive diaphragm is opened to form a diaphragm opening which is fixedly connected with the side wall of the inner cavity of the simple grounding post; the lower end of the conductive core column is aligned with the diaphragm opening.
4. The simple testing device for the grounding resistance of the distribution transformer of claim 1, wherein the simple testing device for the grounding resistance of the distribution transformer further comprises a middle-range bracket.
5. The simple distribution transformer ground resistance testing device according to claim 4, wherein the middle-range bracket comprises a wire stringing head, a connecting rod and a chassis; the stringing head, the connecting rod and the chassis are insulated.
6. The simple distribution transformer ground resistance testing device according to claim 5, wherein the stringing head is provided with a stringing hole for passing a lead; two ends of the stringing hole are opened, and the opening is rounded; anti-skid teeth are arranged at two ends of the stringing hole close to the opening.
7. The simple testing device for the grounding resistance of the distribution transformer of claim 5, wherein the upper end of the connecting rod is fixedly connected with the bottom end of the stringing head; the lower end of the connecting rod is rotatably connected with the chassis through a damping bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920413216.9U CN210037979U (en) | 2019-03-28 | 2019-03-28 | Simple testing device for grounding resistance of distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920413216.9U CN210037979U (en) | 2019-03-28 | 2019-03-28 | Simple testing device for grounding resistance of distribution transformer |
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| Publication Number | Publication Date |
|---|---|
| CN210037979U true CN210037979U (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920413216.9U Active CN210037979U (en) | 2019-03-28 | 2019-03-28 | Simple testing device for grounding resistance of distribution transformer |
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| CN (1) | CN210037979U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189518A (en) * | 2021-05-21 | 2021-07-30 | 唐敏敏 | Lightning protection grounding monitoring device for high-voltage power transmission tower |
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2019
- 2019-03-28 CN CN201920413216.9U patent/CN210037979U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113189518A (en) * | 2021-05-21 | 2021-07-30 | 唐敏敏 | Lightning protection grounding monitoring device for high-voltage power transmission tower |
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