CN112505503A - Alternating current withstand voltage special line testing device and using method - Google Patents
Alternating current withstand voltage special line testing device and using method Download PDFInfo
- Publication number
- CN112505503A CN112505503A CN202011347068.9A CN202011347068A CN112505503A CN 112505503 A CN112505503 A CN 112505503A CN 202011347068 A CN202011347068 A CN 202011347068A CN 112505503 A CN112505503 A CN 112505503A
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- Prior art keywords
- wire
- aluminum foil
- outer cover
- alternating current
- tested
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 39
- 239000011888 foil Substances 0.000 claims abstract description 39
- 238000001125 extrusion Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 6
- 239000005030 aluminium foil Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a testing device for an alternating current withstand voltage special line, which comprises a clamping bracket, a shielding device and a line to be tested, wherein the clamping bracket is provided with a mounting hole, and the line to be tested penetrates through the mounting hole and the shielding device; the clamping support is provided with an extrusion plate with adjustable height. By arranging the aluminum foil outer cover expanding structure, the shielding effect on the wire to be tested is achieved, corona discharge generated by the wire can be eliminated by the aluminum foil outer cover, and the corona prevention capability of the aluminum foil expanding structure on the wire is tested under the condition that the wire passes through alternating current. And through setting up the structure that can fix the wiring plate spare, whether the electric current that conveniently tests through the wiring board through waiting to examine the line receives the influence that the lead wire is too long, leads to the condition that experimental voltage can not rise to expected experimental value. Through setting up the fixed knot structure to waiting to survey the line, guarantee that the wire rod is in a stable state among the whole test process to the structure at aluminum foil dustcoat center is arranged in with the wire rod that awaits measuring through setting up, guarantee the stability of aluminum foil dustcoat to the wire rod shielding effect.
Description
Technical Field
The invention relates to the technical field of power testing, in particular to a testing device for an alternating current withstand voltage power transmission line.
Background
In the field test of 500kV equipment, the situation that the capacity of the voltage-resistant equipment is full and the voltage is not added to an expected test value often occurs. The reason is that the high voltage lead is too long and the surface is not smooth to generate corona, which seriously affects the quality factor Q value, so that the test voltage cannot rise to the expected test value. Generally, an aluminum foil paper expanding shell configured by a manufacturer adopts an expanding connecting wire as a shield to increase the diameter of a conductor and avoid corona discharge of the conductor. However, the aluminum foil paper expanding shell is made of spiral steel wires as a framework, and then an aluminum foil or an aluminum foil with a plastic film on the surface is covered outside the framework to form a cylindrical structure. When the expanded diameter conductor is used in a field test, the connection part of the expanded diameter conductor and equipment is easily damaged due to the poor toughness of the outer covering material. In the test process, the expanded diameter conductor can shake due to high wind, and is easy to damage, so that certain potential safety hazards exist.
Disclosure of Invention
The invention aims to provide a testing device for an alternating current withstand voltage special line, which is used for testing the power transmission effect of a conductor by an aluminum foil expanding shell.
In order to achieve the purpose, the invention provides the following technical scheme: the testing device for the alternating-current voltage-withstanding special line comprises a clamping support, a shielding device and a line to be tested, wherein a mounting hole is formed in the clamping support, and the line to be tested penetrates through the mounting hole and the shielding device;
and the clamping support is provided with an extrusion plate with adjustable height.
Preferably, the clamping bracket includes:
the mounting hole is formed in the vertical bracket;
the pair of cross rods are arranged at two ends of the vertical support, threaded holes are formed in the cross rods at the lower sides of the vertical support, rotating screws are connected in the threaded holes in a screwed mode, and the extrusion plates are arranged at the upper ends of the rotating screws.
Preferably, the lower end of the rotating screw is symmetrically provided with insulating heads.
Preferably, the extrusion plate and the upper cross rod are both provided with a limiting groove.
Preferably, the shielding device is provided with an aluminum foil outer cover, steel wires are embedded in the aluminum foil outer cover, and the steel wires are spirally arranged in a surrounding manner; annular PVC pipes are arranged in the aluminum foil outer cover at intervals; the two ends of the aluminum foil outer cover are provided with openings, a cross-shaped fixing frame is arranged at the center of the cross-shaped fixing frame, and the wire to be measured penetrates through the connecting bolt.
The invention provides a using method which is carried out according to the following steps
A. The wire to be measured penetrates through the connecting bolts at the two sides, and the telescopic length of the aluminum foil outer cover is adjusted according to the length of the wire to be measured arranged in the aluminum foil outer cover;
B. one end of a wire to be tested penetrates through the mounting hole, the extrusion plate and the upper cross rod clamp the wiring board by rotating the insulation head, and the wiring board is electrically connected with the wire to be tested;
C. fixing redundant wires to be tested through the limiting grooves, and screwing screws in the connecting bolts to complete extrusion and fixation of the wires to be tested;
D. the test voltage at the terminal block is observed to rise to the expected test value for the line to be tested.
Compared with the prior art, the invention has the beneficial effects that: by arranging the aluminum foil outer cover expanding structure, the shielding effect on the wire to be tested is achieved, corona discharge generated by the wire can be eliminated by the aluminum foil outer cover, and the corona prevention capability of the aluminum foil expanding structure on the wire is tested under the condition that the wire passes through alternating current. And through setting up the structure that can fix the wiring plate spare, whether the electric current that conveniently tests through the wiring board through waiting to examine the line receives the influence that the lead wire is too long, leads to the condition that experimental voltage can not rise to expected experimental value.
Through setting up the fixed knot structure to waiting to survey the line, guarantee that the wire rod is in a stable state among the whole test process to the structure at aluminum foil dustcoat center is arranged in with the wire rod that awaits measuring through setting up, guarantee the stability of aluminum foil dustcoat to the wire rod shielding effect.
Through setting up the spiral height-adjusting structure to the stripper plate, guarantee that the wiring board homoenergetic of unidimensional, model can obtain fixedly to through the external insulation system in screw rod structure lower extreme, in order to avoid the operation process, the user appears dangerously because of being too close apart from the test structure.
Drawings
Fig. 1 is a schematic structural diagram of an ac withstand voltage dedicated line testing apparatus according to the present invention.
Fig. 2 is a schematic cross-sectional view of a shielding apparatus of the ac withstand voltage dedicated line testing apparatus according to the present invention.
1. Clamping a bracket; 2. a shielding device; 3. a line to be tested; 4. mounting holes; 5. a pressing plate; 6. a threaded hole; 7. rotating the screw; 8. an insulating head; 9. a limiting groove; 10. an aluminum foil outer cover; 11. an annular steel wire; 12. PVC pipes; 13. a cross-shaped fixing frame; 14. and connecting the bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: alternating current withstand voltage private line testing arrangement is including clamping support 1, shield assembly 2 and 3 lines that await measuring, and the line 3 that awaits measuring chooses bare copper line for use. The mounting hole 4 has been seted up on the clamping support 1, and treats that the measuring line 3 passes mounting hole 4 and shield assembly 2, shields the measuring line 3 of overlength through shield assembly 2 to reach and prevent corona discharge, so that carry out subsequent test. The clamping support 1 is provided with an extrusion plate 5 with adjustable height, and the wiring board is fixed through the extrusion effect of the extrusion plate 5. The wiring board is connected with the wire 3 to be tested, and the power transmission effect of the wire 3 to be tested under the condition that the shielding device 2 for preventing corona discharge exists can be tested in the process of electrifying the wire 3 to be tested.
Clamping support 1 includes:
the mounting hole 4 is formed in the vertical bracket;
and the pair of cross rods are arranged at the two ends of the vertical bracket, so that the clamping bracket 1 is integrally formed into a C shape. The threaded hole 6 is opened at the downside horizontal pole, and threaded connection has the rotation screw rod 7 in the threaded hole 6, and stripper plate 5 sets up in rotating the upper end of screw rod 7, and stripper plate 5 can rotate for rotating 7 levels of screw rod. Like this at the rotatory in-process that rotates screw rod 7, displacement about the stripper plate 5 can be accomplished under the prerequisite of not wholly pivoted, and the direction of spacing groove 9 just can not change, and the butt joint line board that also can be stable simultaneously carries out the centre gripping fixed. The lower extreme symmetry of rotating screw rod 7 is provided with insulating head 8, avoids the operation to rotate the in-process of screw rod 7, and the problem of unexpected electric shock takes place.
Limiting grooves 9 are formed in the extrusion plate 5 and the upper side cross rod, and the overlong wire 3 to be tested is fixed through the limiting grooves 9. Meanwhile, a vertically arranged round hole can be formed in the cross rod at the lower side, and a round rod capable of being inserted into the vertical round hole is fixed on the lower side wall of the extrusion plate 5, so that the extrusion plate 5 can be adjusted in height in the rotating process of the rotating screw 7, the user does not need to manually stir the extrusion plate, and the two limiting grooves 9 are ensured to be in the same direction all the time.
The shielding device 2 is provided with an aluminum foil outer cover 10, and the aluminum foil outer cover 10 can be extended when needed, so that the shielding distance is prolonged; the steel wires 11 are embedded in the aluminum foil outer cover 10, the steel wires 11 are spirally arranged in a surrounding manner, a framework for supporting the aluminum foil outer cover 10 is formed by the spirally arranged steel wires 11, and when the aluminum foil outer cover 10 extends, the spiral steel wires 11 also extend; be equipped with annular PVC pipe 12 in the aluminium foil dustcoat 10, and annular PVC pipe 12 is the interval setting, annular PVC pipe 12 through the interval setting props up aluminium foil dustcoat 10, make aluminium foil dustcoat 10 can keep cylindricly constantly, when aluminium foil dustcoat 10 extension and shorten, interval between annular PVC pipe 12 will also change, steel wire 11 through PVC pipe 12 and spiral setting increases the durability of whole hole enlargement connecting wire, avoid its damage when aluminium foil dustcoat 10 is flexible repeatedly.
The two ends of the aluminum foil outer cover 10 are provided with cross-shaped fixing frames 13, and meanwhile, the fixing frames in a shape of Chinese character mi can be arranged to fix the connecting bolts 14. The center of the cross-shaped fixing frame 13 is provided with a connecting bolt 14, and the wire 3 to be measured passes through the connecting bolt 14, so that the wire 3 to be measured can be ensured to be arranged at the center of the aluminum foil outer cover 10. The inner diameter of the connecting bolt 14 is far larger than the diameter of the wire 3 to be measured, and the connecting bolt 14 is provided with internal threads, so that the wire 3 to be measured can be extruded and fixed by screwing a screw in the connecting bolt 14.
The invention also provides a using method: according to the following steps
A. The wire 3 to be measured penetrates through the connecting bolts 14 on the two sides, and the telescopic length of the aluminum foil outer cover 10 is adjusted according to the length of the wire 3 to be measured arranged in the aluminum foil outer cover 10; at the same time, the elongated aluminum foil housing 10 can be bent to facilitate its placement in different operating environments.
B. One end of a wire 3 to be tested penetrates through the mounting hole 4, the extrusion plate 5 and the upper cross rod clamp the wiring board by rotating the insulation head 8, and the wiring board is electrically connected with the wire 3 to be tested;
C. the redundant wires 3 to be tested are fixed through the limiting grooves 9, and screws are screwed in the connecting bolts 14, so that the wires 3 to be tested are extruded and fixed. Therefore, the wire 3 to be measured cannot shake accidentally during operation, and the stability of the wire is ensured.
D. And electrifying the wire 3 to be tested, and observing whether the test voltage at the wiring board rises to an expected test value or not, thereby achieving the reliable and convenient-to-operate alternating current voltage withstand test process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Alternating current withstand voltage private line testing arrangement, its characterized in that: the device comprises a clamping support (1), a shielding device (2) and a wire (3) to be tested, wherein a mounting hole (4) is formed in the clamping support (1), and the wire (3) to be tested penetrates through the mounting hole (4) and the shielding device (2);
the clamping support (1) is provided with an extrusion plate (5) with adjustable height.
2. The alternating current withstand voltage dedicated line testing device according to claim 1, characterized in that: the clamping bracket (1) comprises
The mounting hole (4) is formed in the vertical bracket;
the pair of cross rods are arranged at two ends of the vertical support, threaded holes (6) are formed in the cross rods at the lower sides of the vertical support, rotating screws (7) are screwed in the threaded holes (6), and the extrusion plates (5) are arranged at the upper ends of the rotating screws (7).
3. The alternating current withstand voltage dedicated line testing device according to claim 2, characterized in that: and the lower end of the rotating screw rod (7) is symmetrically provided with insulating heads (8).
4. The alternating current withstand voltage dedicated line testing device according to claim 2, characterized in that: the extrusion plate (5) and the upper side cross rod are both provided with limit grooves (9).
5. The alternating current withstand voltage dedicated line testing device according to claim 1, characterized in that: the shielding device (2) is provided with an aluminum foil outer cover (10), steel wires (11) are embedded into the aluminum foil outer cover (10), and the steel wires (11) are spirally arranged in a surrounding manner; annular PVC pipes (12) are arranged in the aluminum foil outer cover (10), and the annular PVC pipes (12) are arranged at intervals; the aluminum foil outer cover is characterized in that cross-shaped fixing frames (13) are arranged at openings at two ends of the aluminum foil outer cover (10), connecting bolts (14) are arranged at the centers of the cross-shaped fixing frames (13), and the wires to be measured (3) penetrate through the connecting bolts (14).
6. A method for using the apparatus for testing an alternating current withstand voltage dedicated line according to any one of claims 1 to 5, characterized in that: according to the following steps
A. The wire (3) to be measured penetrates through the connecting bolts (14) at the two sides, and the telescopic length of the aluminum foil outer cover (10) is adjusted according to the length of the wire (3) to be measured which is arranged in the aluminum foil outer cover (10);
B. one end of a wire (3) to be measured penetrates through the mounting hole (4), the extrusion plate (5) and the upper cross rod clamp the wiring board by rotating the insulation head (8), and the wiring board is electrically connected with the wire (3) to be measured;
C. redundant wires (3) to be measured are fixed through a limiting groove (9), and screws are screwed in connecting bolts (14) to complete extrusion and fixation of the wires (3) to be measured;
D. for the current supply of the line (3) to be tested, it is observed whether the test voltage at the terminal block rises to the expected test value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347068.9A CN112505503A (en) | 2020-11-26 | 2020-11-26 | Alternating current withstand voltage special line testing device and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347068.9A CN112505503A (en) | 2020-11-26 | 2020-11-26 | Alternating current withstand voltage special line testing device and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112505503A true CN112505503A (en) | 2021-03-16 |
Family
ID=74967896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011347068.9A Pending CN112505503A (en) | 2020-11-26 | 2020-11-26 | Alternating current withstand voltage special line testing device and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112505503A (en) |
-
2020
- 2020-11-26 CN CN202011347068.9A patent/CN112505503A/en active Pending
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