CN211235317U - Device for testing bending fatigue resistance of wind deflection prevention jumper wire insulator - Google Patents
Device for testing bending fatigue resistance of wind deflection prevention jumper wire insulator Download PDFInfo
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- CN211235317U CN211235317U CN201921927644.XU CN201921927644U CN211235317U CN 211235317 U CN211235317 U CN 211235317U CN 201921927644 U CN201921927644 U CN 201921927644U CN 211235317 U CN211235317 U CN 211235317U
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Abstract
The utility model relates to a prevent wind device of partial patch cord insulator bending fatigue test, including frame and support frame, the frame includes horizontal part and vertical portion, and the support frame setting is subaerial in the horizontal part below, is equipped with hoisting mechanism on the horizontal part, is equipped with force sensor in the hoisting mechanism, the utility model has the advantages of: the anti-wind-bias jumper insulator is fixedly installed on the vertical portion, the other end of the anti-wind-bias jumper insulator is connected with the lifting mechanism, the tensile load of the lifting mechanism on the anti-wind-bias jumper insulator is acquired through the tension sensor in real time during testing, the stability of the load in the testing process is ensured, the anti-wind-bias jumper insulator only needs to be lifted and lowered by the lifting mechanism during testing, the swing fatigue test of the anti-wind-bias jumper insulator is achieved through the lifting and lowering of the anti-wind-bias jumper insulator, the overall testing effect is good, and the quick installation of the anti-wind-bias jumper insulator is facilitated.
Description
Technical Field
The utility model relates to a prevent wind device of partial patch cord insulator bending fatigue test.
Background
In recent years, current-guiding jumper wires on 500kV power transmission lines in a plurality of regions nationwide cause flashover under the influence of strong wind to cause tripping accidents, the frequency of the tripping accidents exceeds the acceptable limit of safe operation of a power system, and great harm is brought to the safe operation of the power lines. According to statistics, 500kV and above lines governed by the national network company in 2018 have wind-induced partial tripping for more than 100 times, and the range relates to Jiangsu, Zhejiang, Anhui, Hubei, Henan, Shandong, Shanxi, Beijing, Hebei, northeast and the like. The wind bias discharge has wide range, multiple times and great influence, and is most frequent in typhoon and frequent in typhoon areas in coastal regions. Different from lightning flashover and operation impact flashover, most of windage flashover occurs under working voltage, and reclosing generally cannot be successfully carried out, so that line outage is caused, and great loss is caused to national economy. According to the analysis of the recent windage yaw tripping accidents, the reasons for jumper windage yaw flashover mainly include the following points.
Strong winds are the most direct cause of flashover due to windage yaw of the jumper. The traditional jumper string insulator adopts conventional porcelain and glass, the insulator string inclines towards the direction of a tower under the condition that the wind speed exceeds the designed wind speed, the air gap distance between a lead and the tower is reduced, and flashover occurs when the air gap distance cannot meet the minimum discharge voltage requirement; the composite insulator is adopted for line climbing adjustment, and wind deflection check is not carried out, so that discharge can be caused even if the composite insulator is light in self weight and a heavy hammer swings in a large amplitude during wind deflection.
At present, the main solutions are as follows: 1. the windproof stay wire is reinforced, and the stay wire is fixed on a line hardware fitting to fix a lead, so that the windproof stay wire can play a good role in inhibiting wind deflection generated on the line. However, the line hardware is easy to be damaged by fatigue due to the inflexible rotation of windage yaw and long-time stress. Therefore, the windproof stay wire is additionally arranged, so that potential safety hazards exist in the operation of the line; 2. the heavy hammer is additionally arranged, but the effect of the additional arrangement of the heavy hammer is limited, so that the heavy hammer is not a main measure for fundamentally solving the problem of the hanging wind drift flashover; 3. adopting a windage yaw prevention insulator: the insulator has small windage yaw swing amplitude, and the electric clearance between a wire and a tower is increased; the installation is reliable, but the wire wind dances more seriously for 500kV and above lines because of the larger insulation outer dimension.
The 500kV line is still provided with the conventional jumper string due to the limitation of the bending resistance of the composite insulator core rod. The jumper string of the 500kV power transmission line is generally assembled by vertically hanging or additionally hanging a heavy hammer piece at home and abroad, and the assembly mode cannot fundamentally solve the problem of windage yaw flashover of the jumper; and coastal strong wind area probably adopts V type wire jumper cluster equipment mode, because it needs increase a antithetical couplet insulator, the wire jumper cross arm also need lengthen simultaneously to can cause the great increase of investment. Because the jumper string of the 500kV line is long and has large wind load, and the lead is in a four-split form, the vertically fixed wind deflection preventing jumper insulator string can form large bending moment at the fixed position of the iron tower.
The 500kV wind-proof bias jumper insulator is a product suitable for 500kV lines, the 500kV wind-proof bias jumper insulator needs to be subjected to a bending fatigue test, and compared with a 220kV wind-proof bias jumper insulator, the length and the weight of the 500kV wind-proof bias jumper insulator exceed the bearing range of the existing bending fatigue test equipment, so that the existing bending fatigue test equipment cannot test the 500kV wind-proof bias jumper insulator, the safety performance during testing is reduced, and the test result is easily influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is exactly to provide a prevent wind partial patch cord insulator bending fatigue test's device, solve current bending fatigue test device and can not adapt to 500kV prevent wind partial patch cord insulator bending fatigue test's technical problem.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme: the utility model provides a prevent wind device of partial wire jumper insulator bending fatigue test, includes frame and support frame, the frame includes horizontal part and vertical portion, the horizontal part sets up the top at vertical portion, the frame relies on vertical portion to install subaerial, the support frame sets up subaerial in the horizontal part below, sliding connection has the mechanism of lifting by crane on the horizontal part, it is equipped with force transducer on the mechanism to lift by crane, and the one end of the partial wire jumper insulator of preventing wind that needs the test is installed on vertical portion, and the other end that the partial wire jumper insulator of preventing wind that needs the test links to each other with the mechanism of lifting by crane.
Preferably, the vertical part comprises a vertical frame and a horizontal cross bar arranged on the frame, and the horizontal cross bar is provided with a connecting part for connecting the windage yaw jumper insulator.
Preferably, the connecting portion include stand and the fixed plate of setting on the stand, prevent wind one end of deviating from the wire jumper insulator and pass through bolt assembly and install on the fixed plate.
Preferably, the vertical portion further comprises a mounting plate and a foundation bolt, the mounting plate is arranged at the bottom end of the vertical frame, and the foundation bolt is arranged on the mounting plate.
Preferably, the horizontal part comprises a horizontal frame and a horizontal sliding rail, the hoisting mechanism is arranged on the horizontal sliding rail, and the horizontal sliding rail is provided with a limit switch.
Preferably, the hoisting mechanism comprises an electric hoist and a connecting rope, and the connecting rope is provided with a hoisting ring connected with the electric hoist.
Preferably, the support frame comprises a base and a support seat, the base is provided with a jack connected with the support seat, and the support seat is provided with a placing groove.
Preferably, a protection pad is arranged in the placing groove.
To sum up, the utility model has the advantages that: 1. one end of the wind-deflection-preventing jumper insulator is fixedly arranged on the vertical part, the other end of the wind-deflection-preventing jumper insulator is connected with the lifting mechanism, the tensile load of the lifting mechanism on the wind-deflection-preventing jumper insulator during the test is collected in real time through the tension sensor, the stability of the load during the test is ensured, the wind-deflection-preventing jumper insulator only needs to be lifted and lowered by the lifting mechanism during the test, the swinging fatigue test of the wind-deflection-preventing jumper insulator is realized through the lifting and lowering of the wind-deflection-preventing jumper insulator, the overall test effect is good, the wind-deflection-preventing jumper insulator is favorable for quick installation, the support frame is arranged, the wind-deflection-preventing jumper insulator can be supported, the contact with the ground during the lowering of the wind-deflection-preventing jumper insulator is reduced, the damage during the test of the wind-deflection-, the hoisting mechanism is connected to the horizontal part in a sliding manner and can be adjusted according to the wind deflection prevention jumper wire insulators with different lengths, so that the hoisting mechanism is suitable for bending fatigue resistance tests of the wind deflection prevention jumper wire insulators with different specifications;
2. the vertical part is set into a vertical frame and a horizontal cross rod, and the horizontal cross rod can not only realize the installation of the wind deflection prevention jumper wire insulator, but also improve the strength of the whole vertical part;
3. the connecting part is arranged into a structure of the upright post and the fixing plate, and one end of the wind deflection prevention jumper wire insulator is arranged on the fixing plate through the bolt assembly, so that the fixing quality of the wind deflection prevention jumper wire insulator can be improved, and the wind deflection prevention jumper wire insulator is convenient to install and disassemble;
4. through the arrangement of the mounting plate and the foundation bolts, the mounting plate can improve the contact area of the vertical frame and the ground, and the vertical frame can be stably fixed on the ground;
5. the horizontal part is arranged into the horizontal frame and the horizontal slide rail, the straightness of the sliding of the hoisting mechanism on the horizontal part can be ensured, the sliding displacement of the hoisting mechanism on the horizontal slide rail is limited by the limit switch, the safety performance of the wind-deflection-proof jumper wire insulator is tested in the process,
6. the hoisting mechanism is arranged into the electric hoist and the connecting rope, and the hoisting mechanism is connected with the electric hoist through the hoisting ring on the connecting rope, so that the integral installation efficiency is improved, the connecting rope can realize the stable fixation of the windage yaw jumper wire insulator, the fixation quality is improved, and the fixation quality of the windage yaw jumper wire insulator in the test process is ensured;
7. the supporting frame is arranged into a structure of the base and the supporting seat, so that the effect of supporting one end of the wind deflection prevention jumper wire insulator can be realized, the height of the supporting seat on the base can be adjusted through the jack arranged on the base, the vertical shaking test of the wind deflection prevention jumper wire insulator can be realized, and the wind deflection prevention jumper wire insulator can be effectively adjusted according to different types of wind deflection prevention jumper wire insulators;
8. the protection pad is arranged, and the anti-wind-bias jumper insulator can be protected in the descending process of the hoisting mechanism, so that the contact force between the anti-wind-bias jumper insulator and the placing groove is greatly reduced, and the anti-wind-bias jumper insulator is prevented from being damaged.
Drawings
The invention will be further explained with reference to the drawings:
fig. 1 is a schematic structural view of the device for testing bending fatigue resistance of the windage yaw jumper insulator of the present invention;
fig. 2 is a schematic structural view of the middle support frame of the present invention.
Reference numerals:
the device comprises a frame 1, a horizontal part 2, a horizontal frame 21, a horizontal sliding rail 22, a limit switch 23, a vertical part 3, a vertical frame 31, a horizontal cross bar 32, a connecting part 33, a vertical column 34, a fixing plate 35, a bolt assembly 36, a mounting plate 37, anchor bolts 38, a support frame 4, a base 41, a support seat 42, a jack 43, a placement groove 44, a protection pad 45, a lifting mechanism 5, an electric hoist 51, a connecting rope 52, a lifting ring 53, a tension sensor 6 and the ground 7.
Detailed Description
As shown in fig. 1 and 2, the device for testing bending fatigue resistance of the wind deflection prevention jumper insulator comprises a frame 1 and a support frame 4, wherein the frame 1 comprises a horizontal part 2 and a vertical part 3, the horizontal part 2 is arranged at the top end of the vertical part 3, the frame 1 is arranged on the ground 7 by means of the vertical part 3, the support frame 4 is arranged on the ground 7 below the horizontal part 2, a hoisting mechanism 5 is connected to the horizontal part 2 in a sliding manner, a tension sensor 6 is arranged on the hoisting mechanism 5, one end of the wind deflection prevention jumper insulator to be tested is arranged on the vertical part 3, and the other end of the wind deflection prevention jumper insulator to be tested is connected with the hoisting mechanism 5.
One end of the wind-deflection-preventing jumper insulator is fixedly arranged on the vertical part 3, the other end of the wind-deflection-preventing jumper insulator is connected with the lifting mechanism 5, and the tensile load of the lifting mechanism 5 on the wind-deflection-preventing jumper insulator during the test is collected in real time by the tension sensor 6, so that the stability of the load during the test is ensured, the wind-deflection-preventing jumper insulator only needs to be lifted and lowered by the lifting mechanism 5 during the test, the swinging fatigue test of the wind-deflection-preventing jumper insulator is realized by the lifting and lowering of the wind-deflection-preventing jumper insulator, the overall test effect is good, the fast installation of the wind-deflection-preventing jumper insulator is facilitated, the support frame 4 is arranged, the wind-deflection-preventing jumper insulator can be supported, the contact with the ground during the lowering of the wind-deflection-preventing jumper insulator can be reduced, and the damage during the, and secondly, the hoisting mechanism is connected to the horizontal part in a sliding manner and can be adjusted according to the wind deflection prevention jumper wire insulators with different lengths, so that the wind deflection prevention jumper wire insulators are suitable for bending fatigue resistance tests of the wind deflection prevention jumper wire insulators with different specifications.
The method for testing the 500kV wind deflection prevention jumper wire insulator by the device of the embodiment sequentially comprises the following steps: the method comprises the following steps: firstly, the 500kV wind-proof bias jumper is insulatedOne end of the flange is fixedly connected to the vertical part, then a rated bending load is applied to the other end of the 500kV wind deflection prevention jumper wire insulator, the bending deflection value y of the 500kV wind deflection prevention jumper wire insulator is tested after the insulator is kept for 1min1The rated bending load is 2.5 kN;
step two: then, the 500kV wind-deflection-prevention jumper wire insulator is installed and fixed on a hoisting mechanism to carry out a swing fatigue test, wherein the test amplitude is + y1/2，-y1/4, the frequency of vibration is 0.65Hz, and the frequency of vibration is 5 × 104Secondly, observing the 33 positions of the connecting parts of the core rod and the core body, and ensuring that no visible cracks are generated at the 33 positions of the connecting parts of the core rod and the core body;
repeating the first step, testing the bending deflection value y of the 500kV wind deflection prevention jumper wire insulator after the second fatigue test2If y is21.2y or less1And judging the 500kV windage yaw prevention jumper wire insulator to be a qualified product if y is the case2Greater than 1.2y1And judging that the 500kV windage yaw jumper wire insulator is a defective product.
Vertical portion 3 includes vertical frame 31 and the horizontal cross bar 32 of setting on the frame, be equipped with the connecting portion 33 of connecting windbreak inclined to one side jumper insulator on the horizontal cross bar 32, set vertical portion 3 to vertical frame 31 and horizontal cross bar 32, horizontal cross bar 32 can not only realize the installation of windbreak inclined to one side jumper insulator, can improve the intensity of whole vertical portion 3 moreover, connecting portion 33 includes stand 34 and sets up fixed plate 35 on stand 34, the one end of windbreak inclined to one side jumper insulator is passed through bolt assembly 36 and is installed on fixed plate 35, sets connecting portion 33 to the structure of stand 34 and fixed plate 35, and the one end of windbreak inclined to one side jumper insulator is passed through bolt assembly 36 and is installed on fixed plate 35, can improve the fixed quality of windbreak inclined to one side jumper insulator, and the installation dismantlement is convenient.
The vertical part 3 further comprises a mounting plate 37 and an anchor bolt 38, the mounting plate 37 is arranged at the bottom end of the vertical frame 31, the anchor bolt 38 is arranged on the mounting plate 37, the mounting plate 37 can improve the contact area of the vertical frame 31 and the ground through the arrangement of the mounting plate 37 and the anchor bolt 38, the vertical frame 31 can be stably fixed on the ground, the horizontal part 2 comprises a horizontal frame 21 and a horizontal slide rail 22, the hoisting mechanism 5 is arranged on the horizontal slide rail 22, a limit switch 23 is arranged on the horizontal slide rail 22, the horizontal part 2 is arranged into the horizontal frame 21 and the horizontal slide rail 22, the straightness of the hoisting mechanism 5 sliding on the horizontal part 2 can be ensured, the sliding displacement of the hoisting mechanism 5 on the horizontal slide rail 22 is limited through the limit switch 23, and the safety performance of the wind-proof bias jumper insulator in the test process is ensured.
The hoisting mechanism 5 comprises an electric hoist 51 and a connecting rope 52, a hoisting ring 53 connected with the electric hoist 51 is arranged on the connecting rope 52, the hoisting ring 53 on the connecting rope 52 is connected with the electric hoist 51, the integral installation efficiency is improved, the connecting rope 52 can realize the stable fixation of the windbreak off jumper insulator, the fixation quality is improved, the fixation quality of the windbreak off jumper insulator in the test process is ensured, the support frame 4 comprises a base 41 and a support seat 42, a jack 43 connected with the support seat 42 is arranged on the base 41, a placing groove 44 is arranged on the support seat 42, the support frame 4 is arranged into a structure of the base 41 and the support seat 42, the effect of supporting one end of the windbreak off jumper insulator can be realized, the height of the support seat 42 on the base 41 can be adjusted through the jack 43 arranged on the base 41, and the up-and-down shaking test of the windbreak jumper is realized, and can carry out effectual regulation according to the windage yaw jumper insulator of different models, be equipped with the protection pad 45 in the standing groove 44, can carry out the guard action to the windage yaw jumper insulator when lifting by crane 5 descends the in-process, the contact force of the windage yaw jumper insulator of significantly reducing and standing groove 44 to prevent the damage of windage jumper insulator.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.
Claims (8)
1. The utility model provides a prevent wind device of partial wind wire jumper insulator bending fatigue test which characterized in that: including frame and support frame, the frame includes horizontal part and vertical portion, the horizontal part sets up the top at vertical portion, the frame relies on vertical portion to install subaerial, the support frame sets up subaerial in the horizontal part below, sliding connection has the mechanism of lifting by crane on the horizontal part, it is equipped with force sensor to lift by crane in the mechanism, and the one end of the partial jumper wire insulator of preventing wind that needs the test is installed on vertical portion, and the other end that the partial jumper wire insulator of preventing wind that needs the test links to each other with the mechanism of lifting by crane.
2. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 1, is characterized in that: the vertical part comprises a vertical frame and a horizontal cross rod arranged on the frame, and a connecting part for connecting the windage yaw jumper wire insulator is arranged on the horizontal cross rod.
3. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 2, is characterized in that: the connecting portion include stand and the fixed plate of setting on the stand, prevent wind one end of deviating from the wire jumper insulator and pass through bolt assembly and install on the fixed plate.
4. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 2, is characterized in that: vertical portion still includes mounting panel and rag bolt, the mounting panel sets up in the bottom of vertical frame, rag bolt sets up on the mounting panel.
5. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 1, is characterized in that: the horizontal part comprises a horizontal frame and a horizontal sliding rail, the hoisting mechanism is arranged on the horizontal sliding rail, and a limit switch is arranged on the horizontal sliding rail.
6. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 5, is characterized in that: the hoisting mechanism comprises an electric hoist and a connecting rope, and the connecting rope is provided with a hoisting ring connected with the electric hoist.
7. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 1, is characterized in that: the support frame includes base and supporting seat, be equipped with the jack that links to each other with the supporting seat on the base, be equipped with the standing groove on the supporting seat.
8. The device for testing the bending fatigue resistance of the wind deflection preventing jumper wire insulator according to claim 7, is characterized in that: and a protection pad is arranged in the placing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921927644.XU CN211235317U (en) | 2019-11-08 | 2019-11-08 | Device for testing bending fatigue resistance of wind deflection prevention jumper wire insulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921927644.XU CN211235317U (en) | 2019-11-08 | 2019-11-08 | Device for testing bending fatigue resistance of wind deflection prevention jumper wire insulator |
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| Publication Number | Publication Date |
|---|---|
| CN211235317U true CN211235317U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921927644.XU Active CN211235317U (en) | 2019-11-08 | 2019-11-08 | Device for testing bending fatigue resistance of wind deflection prevention jumper wire insulator |
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| CN (1) | CN211235317U (en) |
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2019
- 2019-11-08 CN CN201921927644.XU patent/CN211235317U/en active Active
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