CN1747088A

CN1747088A - Fast involute grounding switch with ultrahigh-voltage

Info

Publication number: CN1747088A
Application number: CN 200510044514
Authority: CN
Inventors: 王光顺; 王雪霖
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-08-26
Filing date: 2005-08-26
Publication date: 2006-03-15
Anticipated expiration: 2025-08-26
Also published as: CN1329933C

Abstract

The invention is used in ultra high- voltage or extreme high -voltage power line network. A folded connecting lever is mounted on the power output shaft of gearbox. There is a moving contact on the top of the folded connecting lever.

Description

Fast involute grounding switch with ultrahigh-voltage

Technical field

The present invention relates to a kind of high voltage ground switch, in particular for the fast involute grounding switch with ultrahigh-voltage of superhigh pressure or extra-high voltage grid.

Background technology

Earthed switch is the common equipment that is applied in high pressure or the ultra-high voltage transformer station, its operation principle is to utilize of being arranged on each phase line can vertically revolve the connecting rod that turn 90 degrees to connect the termination, the terminal ground connection of connecting rod, the top is a moving contact, when needs maintenance circuit, drive link makes decides the contact short circuit on moving contact and the circuit, so just can be with line-to-ground.The connecting rod of existing earthed switch is the straight-bar of fixing, and the rotation connecting rod makes it upwards turn over 90 degree moving contact is inserted decide contact terminal during landing operation, and maintenance finishes and connecting rod is rotated down 90 again and spends and get final product.But because connecting rod is a straight-bar, connecting rod one end is suspended in the high-altitude during separating brake action knot speed, and pillar will bear bigger torsion, the stability that influence is used; Simultaneously, because the quality of connecting rod is bigger, feed motion is slow, in case the easily long-time arcing discharge of charged ground connection is bigger to the infringement of equipment.

Summary of the invention

The purpose of this invention is to provide that a kind of landing operation is rapid, rational in infrastructure, the fast involute grounding switch with ultrahigh-voltage of long service life.

For achieving the above object, the present invention adopts following technical scheme:

Fast involute grounding switch with ultrahigh-voltage of the present invention comprises

Gear box is installed with connecting rod on the power output shaft of this gear box, and the top of connecting rod has moving contact, it is characterized in that:

Described connecting rod comprises auxiliary arm and the actuating arm that is hinged in a parallel manner on the gear box and is hinged on auxiliary arm and folding arm, the transmission case on actuating arm top, the end of actuating arm is fixedly connected on the power output shaft, and the end of auxiliary arm is hinged on the gear housing; Be provided with driving gear, driven gear and idler gear in the transmission case, idler gear meshes with driving gear and driven gear simultaneously; The top of auxiliary arm is fixedly connected on the gear shaft of driving gear, and the top of actuating arm is hinged on the gear shaft of driven gear, and an end of folding arm is fixedly connected on the gear shaft of driven gear, and another top has moving contact.

Above-mentioned auxiliary arm and actuating arm respectively have two, are installed in the both sides of gear box respectively abreast.

Above-mentioned auxiliary arm and actuating arm also can respectively have one, are installed in a side of gear box abreast.

After adopting technique scheme, fast involute grounding switch with ultrahigh-voltage of the present invention has following advantage:

1, adopt the structure of folding arm, the inertial impact force when having reduced separating brake action knot speed greatly, thus helping increasing the service life improves the accuracy of action.

2, because moving contact press involute path operation, so the movement velocity in switch on of moving contact later stage improves greatly, the arcing time when helping reducing charged ground connection, minimizing is to the infringement of equipment.

3, starting power is little, and when motor-driven, the starting power curve can prolong the useful life of motor near the characteristic curve of motor.

Description of drawings

Fig. 1 is the connecting rod movement locus schematic diagram of one embodiment of the present of invention;

Fig. 2 is the structural representation of one embodiment of the present of invention;

Fig. 3 is the right view of shaft portion.

Embodiment

As shown in Figure 3, fast involute grounding switch with ultrahigh-voltage of the present invention comprises the gear box 1 that is installed on the pedestal, and this gear box 1 is connected with power set, is installed with connecting rod on the power output shaft of gear box 1, and the top of connecting rod has moving contact 2.Described connecting rod comprises auxiliary arm 41 and the actuating arm 43 that is hinged in a parallel manner on the gear box and is hinged on auxiliary arm 41 and the folding arm 42 on actuating arm 43 tops, transmission case 10.The end of actuating arm 43 is fixedly connected on the power output shaft 8, and the end of auxiliary arm 41 is hinged on the gear housing; Be provided with driving gear 411, driven gear 431 and idler gear 421 in the transmission case 10, idler gear 421 meshes with driving gear 411 and driven gear 43 1 simultaneously, simultaneously, the top of auxiliary arm 41 is fixedly connected on the gear shaft of driving gear 411, promptly auxiliary arm 41 nails are dead on the gear shaft of driving gear 411 with pin, it can not be rotated relatively.The top of actuating arm 43 is hinged on the gear shaft of driven gear 431, be that actuating arm 43 is installed on the gear shaft of driven gear 431, but can rotate freely at this gear shaft, one end of folding arm 42 is fixedly connected on the gear shaft of driven gear 431, also being fixed with pin to rotate it relatively, and another top has moving contact 2.

As shown in Figure 2, above-mentioned auxiliary arm 41 and actuating arm 43 respectively have two, are installed in the both sides of gear box 9 and transmission case 10 respectively abreast, and the lower end of folding arm 42 is divided into two forks, is connected to the gear shaft two ends of driven gear 431.

Certainly, auxiliary arm 41 and actuating arm 43 also can respectively be provided with one, are installed in a side of gear box 9.

As shown in Figure 1, the movement velocity of moving contact 2 depends on the diameter ratio of driving gear 411 and driven gear 431, if when selecting the diameter ratio of driving gear 411 and driven gear 431 to be 3: 1, auxiliary arm 41 and actuating arm 43 revolve and turn 90 degrees, folding arm 42 just can rotate 270 degree, and moving contact 2 is moved by involute path.Compare with traditional straight-bar type earthed switch, the movement velocity of moving contact 2 after arriving striking point A is enhanced about more than once than traditional approach, moving contact arrival A point rear-guard swing arm turns over angle [alpha] again and just arrives closing position, and will turning over 2 α again, traditional earthed switch just can arrive closing position, as shown in Figure 1, what solid line was represented among the figure is the running orbit of ultra high voltage high speed grounding switch, and what dotted line was represented is the running orbit of traditional earthed switch.Thereby ultra high voltage high speed grounding switch of the present invention significantly reduces the arcing time, effectively reduces the extent of damage to fixed contact 11 and insulation column 12.

Certainly, the diameter of driving gear 411 and driven gear 431 is than also doing suitable adjustment as required.

In order to improve the gear reliability of operation, can in transmission case 10, pour into lubricating oil.

If do not consider the lubricated of gear, also transmission case 10 can be set, get final product and only passive supporting bracket is set in the both sides of driving gear 411, driven gear 431, idler gear 421.

In order to guarantee the electric conductivity of connecting rod, flexible conductor is set between folding arm 42, auxiliary arm 41 and actuating arm 43 connects.

Claims

1, fast involute grounding switch with ultrahigh-voltage comprises

Gear box (1) is installed with connecting rod on the power output shaft of this gear box (1), and the top of connecting rod has moving contact (2), it is characterized in that:

Described connecting rod comprises auxiliary arm (41) and the actuating arm (43) that is hinged in a parallel manner on the gear box and is hinged on auxiliary arm (41) and the folding arm (42) on actuating arm (43) top, transmission case (10), the end of actuating arm (43) is fixedly connected on the power output shaft (8), and the end of auxiliary arm (41) is hinged on the gear housing; Be provided with driving gear (411), driven gear (431) and idler gear (421) in the transmission case (10), idler gear (421) meshes with driving gear (411) and driven gear (431) simultaneously; The top of auxiliary arm (41) is fixedly connected on the gear shaft of driving gear (411), the top of actuating arm (43) is hinged on the gear shaft of driven gear (431), one end of folding arm (42) is fixedly connected on the gear shaft of driven gear (431), and another top has moving contact (2).

2, fast involute grounding switch with ultrahigh-voltage according to claim 1 is characterized in that: auxiliary arm (41) and actuating arm (43) respectively have two, are installed in the both sides of gear box (1) respectively abreast.

3, fast involute grounding switch with ultrahigh-voltage according to claim 1 is characterized in that: auxiliary arm (41) and actuating arm (43) respectively have one, are installed in a side of gear box (1) abreast.