CN211478601U - Lightning arrester direct current leakage current test branch line contact device - Google Patents
Lightning arrester direct current leakage current test branch line contact device Download PDFInfo
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- CN211478601U CN211478601U CN201921883787.5U CN201921883787U CN211478601U CN 211478601 U CN211478601 U CN 211478601U CN 201921883787 U CN201921883787 U CN 201921883787U CN 211478601 U CN211478601 U CN 211478601U
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Abstract
The utility model discloses a lightning arrester direct current leakage current test branch line contact device, it includes insulation board I, insulation board II, the set screw, 2 conductive screw, 2 contact pieces, straining spring, insulation board I, insulation board II connects together through set screw and forms the support, it has 2 spouts to open on insulation board II, 2 conductive screw one end respectively with insulation board I on the conducting rod swing joint, the other end passes 2 spouts respectively and sets up in insulation board II one side, conductive screw can move in the spout and be used for adjusting the interval between 2 conductive screw, 2 contact pieces respectively the activity set up on 2 conductive screw's the other end, straining spring connects between 2 conductive screw, conductive screw is overlapped and is equipped with 2 stop nuts and is located insulation board II both sides respectively; this device is guaranteeing to contact well simultaneously, enables the branch device and can not receive wind, uneven waiting factor influence of ground and empty, has reduced and has emptyd the person that leads to, the risk of equipment damage.
Description
Technical Field
The utility model relates to an experimental branch line contact device of arrester direct current leakage current belongs to the power equipment high-voltage testing field.
Background
The arrester is a necessary device for protecting electrical equipment from high transient overvoltage during lightning stroke, limiting follow current time and limiting follow current amplitude, wherein the arrester operated in the power grid is mainly a zinc oxide arrester. The metal oxide arrester needs to carry out preventive tests regularly so as to discover the hidden danger of the arrester in time and ensure the reliable action of the arrester when bearing overvoltage. The preventive tests of the lightning arresters of all voltage classes are carried out by our teams for nearly hundred times every year, and a large amount of labor and material cost is consumed.
The lightning arrester pre-test project comprises insulation resistance, leakage current under direct current 1mA voltage U1mA and 0.75U1mA, and lightning arrester discharge counter test; the leakage current measurement under 0.75U1mA is greatly influenced by the interference of an on-site electromagnetic field, and in order to reduce the interference, the on-site test needs to keep the high-voltage line and the measurement line at a vertical angle as much as possible.
Generally, an overhead trolley and an insulating rod are generally adopted for wiring in a direct current leakage current test of an arrester with the voltage of more than 110kV, and certain personal risks and equipment risks exist in both methods. The novel method adopted by the existing test wiring is to adopt a fixing device for wiring, namely the fixing device is fixed on the ground, and the high-voltage test output line and the measuring line are close to an included angle of 90 degrees by the principle that the insulating rod supports and the cross arm fixes the outgoing line, so that the aims of reducing interference and reducing test cost are fulfilled.
However, the fixing devices used at present are too simple and present a great risk for field use. For example, the contact position of the fixing device of the branch line and the lightning arrester flange needs to ensure good metal contact, so that the obvious discharge condition is avoided, meanwhile, the device of the branch line is ensured not to topple over, and the occurrence of damage equipment, short circuit grounding of adjacent interval electrified equipment and even personal casualty accidents is avoided.
Disclosure of Invention
To prior art's defect, the utility model provides an experimental branch line contact device of arrester direct current leakage current aims at improving the contact member of experimental branch line device, ensures that device and arrester flange contact are good, reduces equipment, personal risk simultaneously.
The utility model discloses an insulation board I, insulation board II, set screw, 2 conductive screw, 2 contact pieces, take-up spring, insulation board I, insulation board II links together through set screw and forms the support, it has 2 spouts to open on insulation board II, 2 conductive screw one end respectively with the conducting rod swing joint on the insulation board I, the other end passes 2 spouts setting respectively in II one sides of insulation board, conductive screw can remove the interval that is used for adjusting between 2 conductive screw in the spout, 2 contact pieces activity sets up respectively on the other end of 2 conductive screw, take-up spring connects between 2 conductive screw, conducting rod and high-voltage output line are connected, every conductive screw goes up the cover and is equipped with 2 stop nut and is located II both sides of insulation board respectively.
The contact piece is fixed on the nut, and the nut is sleeved on the other end of the conductive screw and is in threaded fit with the conductive screw.
One end of each conductive screw is provided with a connecting ring, one end of each conductive rod is provided with a hanging buckle, the connecting rings are connected with the hanging buckles, and the other ends of the conductive rods are connected with the high-voltage output lines.
The fixed screw is a screw wrapped with an insulating material.
The device further comprises a fixing plate and a connecting sleeve, wherein the connecting sleeve is fixed on the insulating plate I through the fixing plate.
This device still includes tripod, flexible insulator spindle, horizontal pole, and flexible insulator spindle is fixed on the A-frame, and horizontal pole one end is passed through universal joint and is fixed on flexible insulator spindle top, and insulation board I passes through the connecting sleeve and fixes on the horizontal pole other end, and high voltage output line passes the horizontal pole and sets up in it, and high voltage output line one end is connected with the conducting rod on the insulation board I, and the other end is connected with check out test set, and it constitutes the branch device.
The length of the sliding groove is 1-2 cm.
During the use, install this arrester direct current leakage current test branch line contact device on conventional branch line device, perhaps install on the branch line device that comprises tripod, flexible insulator spindle, horizontal pole, and the contact piece of this device and high voltage output line and arrester become 90 contained angles, put 2 contact pieces in arrester flange both sides, let the contact piece press from both sides tight arrester flange through straining spring's shrink, ensure that the contact is good firm, then start detection device and test.
The utility model has the advantages and the technical effect:
the utility model discloses the device can press from both sides tight arrester flange, when guaranteeing that the contact is good, enables the branch line device and can not receive wind, the influence of factors such as the ground inequality and empty, has reduced the risk that the person, the equipment that lead to empty, and this device simple structure, convenient to use, and stability are good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor;
FIG. 1 is a schematic view of a contact device according to the present invention;
FIG. 2 is a schematic top view of the insulating plate II;
FIG. 3 is a schematic view of the present apparatus and branch apparatus and the state of use;
in the figure: 1-an insulating board I; 2-insulating board II; 3-fixing the screw rod; 4-a conductive screw; 5-a contact sheet; 6-tensioning a spring; 7-a chute; 8-a conductive rod; 9-a limit nut; 10-fixing the plate; 11-a connecting sleeve; 12-tripod; 13-telescopic insulating rod; 14-a cross-bar; 15-universal joint.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the scope of the present invention is not limited to the above description.
Example 1: the branch contact device for the lightning arrester direct current leakage current test comprises an insulation board I1, an insulation board II 2, a fixing screw 3, 2 conductive screws 4, 2 contact pieces 5 and a tension spring 6, wherein the insulation board I1 and the insulation board II 2 are connected together through the fixing screw 3 to form a support, 2 sliding grooves 7 are formed in the insulation board II 2, one ends of the 2 conductive screws 4 are respectively provided with a connecting ring, one end of each conductive rod 8 is provided with a hanging buckle, the connecting ring at one end of each conductive screw 4 is connected with the hanging buckle of the conductive rod 8 on the insulation board I1, the other end 4 of each conductive screw 4 penetrates through the sliding groove 7 to be arranged on one side of the insulation board II 2, the 2 conductive screws 4 move in the sliding grooves 7 to adjust the distance between the 2 conductive screws, the contact pieces 5 are welded and fixed on nuts, and the nuts are sleeved on the other; the tensioning spring 6 is connected among the 2 conductive screw rods 4, the other end of the conductive rod 8 is connected with a high-voltage output line, and each conductive screw rod 4 is sleeved with 2 limiting nuts 9 and respectively positioned on two sides of the insulating plate II 2; the length of the sliding chute 4 is 2 cm;
example 2: the structure of the device of the embodiment is the same as that of embodiment 1, and is different from that of embodiment 1 in that the device further comprises a fixing plate 10, a connecting sleeve 11, a tripod 12, a telescopic insulating rod 13 and a cross rod 14, wherein the connecting sleeve 11 is fixed on an insulating plate I1 through the fixing plate in a welding mode; the telescopic insulating rod is fixed on the triangular support, one end of the cross rod is fixed on the top end of the telescopic insulating rod through a universal joint 15, the insulating plate I1 is fixed on the other end of the cross rod through a connecting sleeve 11, a high-voltage output line penetrates through the cross rod and is arranged in the cross rod, one end of the high-voltage output line is connected with the conducting rod on the insulating plate I1, the other end of the high-voltage output line is connected with detection equipment, and the length of the sliding groove 4 is.
The device takes a lightning arrester direct current leakage current test as an example, and comprises the following use steps:
(1) after the two contact pieces are checked to be normal, the two contact pieces are fixed on the conductive screw;
(2) checking the conditions of deformation and dislocation of the conducting rod, the fixed rod, the insulating plate and the tension spring;
(3) connecting and fixing the contact device on the branch device;
(4) connecting the high-voltage output line of the branch line device to the tail part of the conductive rod 8 of the contact device;
(5) raising the branch line device to a proper height to make the contact piece and the flange in a straight line;
(6) pushing the contact piece to enable the contact piece to clamp the lightning arrester flange;
(7) and (5) operating a leakage current test instrument of the lightning arrester.
220kV and 500kV voltage class transformer substations are selected for field tests.
(1) 220kV lightning arrester direct current leakage current test
According to the test result, when the 220kV lightning arrester is tested, the labor cost and the test time can be reduced by using the branch line device, and the test result is not influenced by adopting the contact device.
(2) Direct current leakage current test of 500kV lightning arrester
According to the test result, when the 500kV lightning arrester is tested, the labor cost is doubled after the developed branch line device is used, and the test result is not influenced by using the contact device of the embodiment.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an experimental branch line contact device of arrester direct current leakage current which characterized in that: comprises an insulation board I (1), an insulation board II (2), a fixing screw rod (3), 2 conductive screw rods (4), 2 contact pieces (5) and a tension spring (6), wherein the insulation board I (1) and the insulation board II (2) are connected together through the fixing screw rod (3) to form a support, 2 sliding grooves (7) are formed in the insulation board II (2), one ends of the 2 conductive screw rods (4) are respectively movably connected with a conductive rod (8) on the insulation board I (1), the other ends of the 2 conductive screw rods (4) penetrate through the 2 sliding grooves (7) to be arranged on one side of the insulation board II (2), the conductive screw rods (4) move in the sliding grooves (7) to adjust the distance between the 2 conductive screw rods, the 2 contact pieces (5) are respectively arranged on the other ends of the 2 conductive screw rods (4), the tension spring (6) is connected between the 2 conductive screw rods (4), the conductive rods (8) are connected, each conductive screw rod (4) is sleeved with 2 limiting nuts (9) and is respectively positioned on two sides of the insulating plate II (2).
2. The arrester dc leakage current test branch line contact device according to claim 1, characterized in that: the contact piece (5) is fixed on the nut, and the nut is sleeved on the other end of the conductive screw rod (4) and is in threaded fit with the conductive screw rod.
3. The arrester dc leakage current test branch line contact device according to claim 1, characterized in that: one end of the conductive screw rod (4) is provided with a connecting ring, one end of the conductive rod (8) is provided with a hanging buckle, the connecting ring is connected with the hanging buckle, and the other end of the conductive rod (8) is connected with a high-voltage output line.
4. The arrester dc leakage current test branch line contact device according to claim 1, characterized in that: the fixed screw is a screw wrapped with an insulating material.
5. The arrester dc leakage current test branch line contact device according to claim 1, characterized in that: the device also comprises a fixing plate (10) and a connecting sleeve (11), wherein the connecting sleeve (11) is fixed on the insulating plate I (1) through the fixing plate.
6. The arrester dc leakage current test branch line contact device according to claim 5, characterized in that: this device still includes tripod, flexible insulator spindle, horizontal pole, and flexible insulator spindle is fixed on the A-frame, and horizontal pole one end is passed through universal joint and is fixed on flexible insulator spindle top, and insulation board I (1) is fixed on the horizontal pole other end through adapter sleeve (11), and high voltage output line passes the horizontal pole and sets up in it, and high voltage output line one end is connected with the conducting rod on insulation board I (1), and the other end is connected with check out test set.
7. The arrester dc leakage current test branch line contact device according to claim 1, characterized in that: the length of the sliding chute (7) is 1-2 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921883787.5U CN211478601U (en) | 2019-11-04 | 2019-11-04 | Lightning arrester direct current leakage current test branch line contact device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921883787.5U CN211478601U (en) | 2019-11-04 | 2019-11-04 | Lightning arrester direct current leakage current test branch line contact device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211478601U true CN211478601U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921883787.5U Active CN211478601U (en) | 2019-11-04 | 2019-11-04 | Lightning arrester direct current leakage current test branch line contact device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211478601U (en) |
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2019
- 2019-11-04 CN CN201921883787.5U patent/CN211478601U/en active Active
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