CN220772402U - High-voltage switch static contact grip strength detector - Google Patents
High-voltage switch static contact grip strength detector Download PDFInfo
- Publication number
- CN220772402U CN220772402U CN202321833223.7U CN202321833223U CN220772402U CN 220772402 U CN220772402 U CN 220772402U CN 202321833223 U CN202321833223 U CN 202321833223U CN 220772402 U CN220772402 U CN 220772402U
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- China
- Prior art keywords
- static contact
- voltage switch
- hand wheel
- arm rod
- contact
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- 230000003068 static effect Effects 0.000 title claims abstract description 36
- 239000000523 sample Substances 0.000 claims abstract description 13
- 238000009413 insulation Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000032683 aging Effects 0.000 abstract description 2
- 238000004880 explosion Methods 0.000 description 11
- 238000005538 encapsulation Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Abstract
The utility model discloses a grip strength detector for a static contact of a high-voltage switch, which comprises a detection head, a grounding device, an insulating arm rod and an operating hand wheel, wherein the detection head is connected with the grounding device; the probe is conical and is arranged at the front end of the insulation arm rod; the rotation center of the operation hand wheel is fixed at the tail end of the insulation arm rod; the tail end of the probe is provided with a grounding device. According to the utility model, in the process of overhauling the high-voltage switch, fatigue and aging of the O-shaped grip spring of the static contact in the high-voltage switch can be timely detected, the conditions of insufficient grip and insufficient adhesion pressure in the cooperation of the movable contact and the static contact are improved, the overhauling efficiency of the high-voltage switch is improved, and the safety and reliability of an underground power supply system are improved.
Description
Technical Field
The utility model belongs to the technical field of electric power detection, and particularly relates to a grip strength detector for a static contact of a high-voltage switch.
Background
In the underground power supply system, electrical equipment such as a high-voltage switch incoming line cabinet, a contact cabinet, a high-voltage permanent magnet power distribution device, a high-voltage permanent magnet starter, a mining mobile substation and the like are arranged at a mining face power distribution point, and the inner structures of the electrical equipment are connected by a movable contact and a static contact no matter whether a high-explosion switch is advanced or not, and the functions and the types of the electrical equipment are all the same. The good and bad running states of the movable contact and the static contact directly influence the safe and reliable running of the whole power supply system. The movable contact and the fixed contact in the high-explosion switch are ensured to run in a sound state, and the movable contact and the fixed contact are important links for guaranteeing underground safe power supply.
In maintenance work, because of the internal structural reasons of the underground high-voltage switch and the movable transformer substation high-voltage switch, the static contact is embedded at the innermost side of the high-voltage switch shell, the outside of the static contact is encapsulated by the closed insulating table, only 1/4 of the edge of the outermost O-shaped holding clamp spring can be seen by external observation, whether the static contact of the high-voltage switch is aged or not and whether the O-shaped holding spring is tired or not is lowered or not can not be easily found by observing the appearance, and after the movable contact is inserted into the static contact, whether the contact pressure of the static contact and the movable contact can be met or not can not be confirmed.
When the contact pressure of the movable contact and the static contact does not reach the standard, virtual connection is caused, and under the high-voltage and high-current running state, arc light is easy to strike, so that arc short circuit is caused. The light person burns out the electric equipment, causes branch power failure, and the heavy person causes override trip, causes underground large-scale power failure, and even causes underground electric fire.
Under the prior art condition, to eliminate the hidden danger of virtual connection caused by the fact that the contact adhesion pressure of the movable contact and the fixed contact does not reach the standard, the high-voltage switch must be disassembled periodically, the external packaging insulating table of the fixed contact is disassembled, the appearance inspection is carried out, the insertion test of the movable contact and the fixed contact is carried out, and the good contact between the movable contact and the fixed contact is confirmed. The side of the high-explosion switch power supply and the load side are totally provided with 6 groups of static contacts, each group of static contact encapsulation insulating platforms are provided with 4 fixing bolts, and 24 fixing bolts are required to be removed when the 6 groups of static contact encapsulation insulating platforms are removed; before the fixed contact encapsulation insulating table is disassembled, the residual fixing bolts of the rear cavity end cover 10 of the high-explosion switch wiring must be disassembled firstly, the insulating table encapsulation bolts are extremely difficult to disassemble due to the narrow space, only the bolts are disassembled, the time is required to be approximately 1 hour, the recovery installation time is added, and the time required to check the state of the fixed contact of the high-explosion switch is 2 to 3 hours. In the underground central and mining area substation, the number of the high-explosion switches is large, if the high-explosion switches are disassembled and inspected according to the original process, all the high-explosion switch static contacts in all the substation are inspected once, the production is stopped for 2 to 3 days, the maintenance time is long, and the normal production of a mine is influenced.
Disclosure of Invention
The utility model provides a grip strength detector for a static contact of a high-voltage switch. In the process of overhauling the high-voltage switch, the fatigue aging of the O-shaped grip spring of the static contact inside the high-voltage switch can be timely detected, the conditions of insufficient grip and insufficient adhesion pressure in the cooperation of the movable contact and the static contact are improved, the overhauling efficiency of the high-voltage switch is improved, and the safety and the reliability of an underground power supply system are improved.
The utility model adopts the technical scheme that: a grip strength detector of a high-voltage switch static contact comprises a detection head, a grounding device, an insulating arm rod and an operating hand wheel; the probe is conical and is arranged at the front end of the insulation arm rod; the rotation center of the operation hand wheel is fixed at the tail end of the insulation arm rod; the tail end of the probe is provided with a grounding device.
Further, the operating hand wheel is semicircular, and an insulating layer is arranged on the outer surface of the operating hand wheel.
Further, the grounding device is a grounding wire, and the grounding wire adopts a grounding flat copper wire.
The utility model has the beneficial effects that: when detecting the inside static contact of high explosion switch, need not to disassemble the inside static contact of high explosion switch, only need use to paint the conductive paste with the probe then insert the static contact root of being surveyed, each 30 degrees of rotation about the operation hand wheel is gripped to both hands, and the operator can feel the resistance of moving contact inserted the static contact and the resistance when rotatory operation hand wheel directly perceivedly to whether the whole grip of static contact and paste sticiss the pressure and satisfy the requirement is preliminarily judged. The detector is pulled out, the friction condition of the conductive paste on the surface of the probe is observed, and whether the whole holding force, the sticking pressure and the contact area of the static contact are required or not is confirmed again according to the force intensity of the probe pulled out and the friction trace of the conductive paste, so that the sound state of the static contact can be accurately judged; the original overhaul process is changed, the overhaul quality of key places and key power supply equipment is improved, the overhaul time is saved, and the phenomenon that key parts are not overhauled due to insufficient overhaul time is avoided.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the hand wheel of the present utility model;
FIG. 3 is a cross-sectional view of the operating handwheel;
in the figure: 1-detecting head, 2-earthing device, 3-insulating arm lever, 4-operating hand wheel, 5-insulating layer.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, the utility model discloses a grip strength detector for a static contact of a high-voltage switch, which comprises a detecting head 1, a grounding device 2, an insulating arm rod 3 and an operating hand wheel 4, wherein the detecting head 1 is conical and is arranged at the front end of the insulating arm rod 3; the operating hand wheel 4 is semicircular, and the rotation center of the operating hand wheel is fixed at the tail end of the insulating arm rod 3. The insulating arm rod 3 adopts a polyvinyl chloride epoxy resin insulating rod, the withstand voltage reaches more than 10KV, two ends of the insulating arm rod respectively use two M6 crisscross bolts to connect the detecting head 1 with the operating hand wheel 4, and the personal safety of operators is ensured. The tail end of the probe is provided with a grounding device 2, the grounding device 2 is a grounding wire, and a grounding flat copper wire is adopted. In the detection process, the other end of the grounded flat copper wire is connected with a grounding system at the position of the detected high-explosion switch, so that the personal safety of an operator in the detection process can be ensured even if the high-voltage main loop fails to discharge sufficiently, and the grounding protection function is realized. The semicircular operation hand wheel is made of a galvanized steel pipe with phi 12, an insulating layer 5 on the outer surface is wound by a polyvinyl chloride high-voltage insulating tape for 6 layers, and each layer is resistant to pressure of 3000V, so that the pressure resistance of the operation hand wheel reaches 18000V, and the operation hand wheel is safe and attractive.
When the utility model is used, the surface of the probe is coated with the conductive paste, then the probe is inserted into the root of the static contact, and the two hands are tightly held by the tail hand wheel to rotate for 30 degrees, so that an operator can intuitively feel the resistance of the moving contact inserted into the static contact and the resistance when the manual wheel disc is rotated, and the whole holding power and the sticking compacting force of the static contact can be preliminarily judged to meet the requirements. And (3) pulling out the detector, observing the friction condition of the conductive paste on the surface of the probe, and determining whether the whole holding force, the sticking pressure and the contact area of the static contact meet the requirements again according to the force of pulling out the detector head and the friction trace of the conductive paste. Through the two steps, whether the static contact is aged or not can be accurately judged, and once timely replacement is found, the safety and reliability of a power supply system are ensured.
The utility model has excellent insulation and voltage resistance and reliable grounding assembly, and can be used as a discharging rod. The novel power supply system can discharge a power supply bus in the power supply system, can discharge bare charged bodies which cannot be contacted by an original discharging rod due to narrow space, and has the advantages that compared with the original discharging rod, the safety and the light durability are remarkably improved in terms of the ground withstand voltage level, the volume and the weight.
Claims (3)
1. The utility model provides a high tension switch static contact grip detector which characterized in that: the device comprises a detecting head, a grounding device, an insulating arm rod and an operating hand wheel; the probe is conical and is arranged at the front end of the insulation arm rod; the rotation center of the operation hand wheel is fixed at the tail end of the insulation arm rod; the tail end of the probe is provided with a grounding device.
2. The high voltage switch stationary contact grip detector of claim 1, wherein: the operating hand wheel is semicircular, and an insulating layer is arranged on the outer surface of the operating hand wheel.
3. The high voltage switch stationary contact grip detector of claim 1, wherein: the grounding device is a grounding wire, and the grounding wire adopts a grounding flat copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833223.7U CN220772402U (en) | 2023-07-13 | 2023-07-13 | High-voltage switch static contact grip strength detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321833223.7U CN220772402U (en) | 2023-07-13 | 2023-07-13 | High-voltage switch static contact grip strength detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220772402U true CN220772402U (en) | 2024-04-12 |
Family
ID=90604790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321833223.7U Active CN220772402U (en) | 2023-07-13 | 2023-07-13 | High-voltage switch static contact grip strength detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220772402U (en) |
-
2023
- 2023-07-13 CN CN202321833223.7U patent/CN220772402U/en active Active
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