DE1942098B2 - PNEUMATICALLY BEATABLE PISTON DRIVE ON BOTH SIDES FOR ELECTRIC CIRCUIT BREAKERS - Google Patents

Description

I 942 09Ö

1 2

The invention relates to a pneumatic arrangement on both sides

beaulschlagharen piston drive for electrical pressure in the cylinder space of the movement dümplcis

siungssclialier with directly moved switching con - one of the gas pressure of the pneumatic drive

stroke and with a value determined with the piston on both sides of the system, the non-return

interacting motion damper, consisting of 5 valve pushed open, and part of the cooperative

Damping piston and cylinder. Pressed gas is discharged from this space,

With Kolbeiuinirieben this kind of motion has the consequence that the gas pressure in this damper the purpose, the high speed of the cylinder space suddenly decreases so strongly that the moving parts down to a harmless value - gas remaining in this space no longer add more before they hit a stop. io is able to move the moving parts with the switching contact. For this purpose, with a device known from the Swiss patent specification 227 424, the cylinder and the cylinder space of the motion damper * with one of the piston of the Movement damper and connected by a pas throttle channel, through which, when the pressure rises, a part of the force exerted in the switching contact and the gas mass is forced through when the pressure rises. For this, the load on the non-return valve can be achieved if part of the kinetic energy to be absorbed is wasted that the moving parts need with the switching contact. An other part of this energy is initially strongly decelerated by the adiabatic compression of the gas in motion over a short braking distance and then the pressure in the motion damping damper is converted into heat, which can suddenly be released to the surroundings by opening the check valve. So that the gas pressure in the cylinder chamber of the motion damper is reduced so much that the moving parts hit the stop with a practically zero Geiuitomatiseh of the moving parts with the speed.
Switching contact exerted driving force, i.e. the It is noted that these parts adapt from the German design kinetic energy, is known in this 25 script 1 11 3 498 tin motion damper, known device of the throttle channel with which its cylinder space with a to a lower- The high pressure side of the pneumatic system connecting pressure chamber leading to this cylinder chamber. closing:, loaded non-return valve open

It has now turned out that it is connected, although in the send channel. The return is

In many cases, both possibilities of the energy check valve are loaded by springs, so that this Bo

The conversion for the desired deceleration of the load does not depend on the moving parts or the

moving parts of the device are sufficient. Circumstances moving switch contact driving force dependent

can give, for which it is impossible, through which is. This well-known motion damper adapts itself

Arrangement of void Drnsselkanak and a good therefore the pressure of the drive gas, which at

To achieve a usable result depending on the heat. 35 a compressed gas driven by the extinguishing gas

'-HiIi-IiL- l'mviände lie /.Ii. With compressed gas switches, switches fluctuate very strongly k-i.nn, not at all.

• μ. Ih-i those aK gas / mn propulsion and in the drawing, the invention is in different

bicniscn (L - movable switching contacts as well as for the new embodiments, for example, illustrative

Ιΐ'Μ.Ίκ-η de · - Schalthogc-ns sulfur hexalluord light.

(ST ₁ - (IaS) is used. Hei such switches 40 Fig. 1 shows an axial section of a pneumatic

niul'i the speed of the switch contact large, table piston drive for the moving switch

From the I bib des l'cwcgiingsilaniplers, only km / lakl of an electrical circuit breaker with moving

-a. wiihund prevents grazing. that the gimg dampers according to the invention:

sJialikiMiiaki dutch the one in the motion damper. Fig. 2 shows an axial section of a first

>. \ μ hl ·) -. ■ L-Ii-- ¹ . staik compressed gas as by a 15 variant of the Bevvegiingsdämpfers according to Fig. 1 and

K (Ki / uiik k'jcwoiTen will. Particularly with dwell- Fig. 3 shows one, axial section of a second

dun ·. ¹ .mi SI ₍ gas jsi dieGclahr a turning back variant of this movement damper.

ΐ'ί'Ί ',. wi.il with this gas d.i · ratio (\. Γ only in Fig. 1 1 is a cylinder and 2 is a piston

> ■ in ·. ¹ ! '1 "I ¹ Hi, ils I. nanilieh mn I.Ofi isi. So ti; ι (Λ for the pneumatic drive of one with a KoI-

·]: · Ailial'.itiselieii Knnipi, - imi of the gas in the bath rod 3 coupled, not in the drawing

-.-- Hi ■ · ·· !, 1 π 11 -1L1 um.-Ine L'eiingc Tempcrakirstieg more detailed illustrated switching contact of an electrical

,! i.itiii 'im.I il-.li.illi inn a very small part of the circuit breaker. The cylinder covers 4, 5 are with

'■ tu ii .. iien I -ueii'ie in tub uiii'.

'.aiiu fimgs / ylinder rooms 8, 9 for free, in the

I) ■■ I 111: 1 ■ 111 π ι ■ lievi ill · vulüabe /Ui'.iimde. a .v> hen 2 ν orgesehi'iie steaming flask 10.il cindrin-

Piston drive of the initially gyn.imiicn All / u .-. Cliaf- when the piston 2 is a stop 12 b / w.

fen. in which everyone approaches the movement in a simple manner to limit its stroke. The damping

mniüsdämpler conditions are met. filling cylinder spaces 8, 9 are each via a channel 14,

According to the invention, this object is achieved with a

Ii) Si. that there is a steam chamber in the non-return 60 held in place by a spring 16, 17.

Can be connected to a space 20, 21 with a / ur outside valve 18, 19, the

a Nieilerdruekiauiii leading duct, which a / u through an opening 22, 23 with the outside air or

the loading / cylinder chamber closing is connected to a low-pressure chamber. Further

Has constant check valve, is connected and are the main cylinder chambers fi. 7 and the damping

dal '. the check valve by a pneumatic 65 cylinder chamber. 9 via channels 24. 25 and 26, 27 with

Ki en UIa-IeI is. see that in one with the high shut-off valves 28, 29 connected, which the main

(11IHk-CiIe of the pneumatic drive system connect / ylinderräumc 6, 7 either with the outside air resp.

'iiindi η, η Hardly bel'nulel. the low-pressure room or with a storage container

UT 30 iiiii Cius iinler connect high pressure and either shut off the damping cylinder rubble.) which is connected to the reservoir 30 ■■ knowing how to do it.

The spring 16, 17 of the check valve 18, I ¹ J is supported by a piston 31, 32 which is arranged heweglicli in a cylinder 33, 3-1. The ilen piston 31, 32 and therefore via the spring 16, 17 this check valve is a burdening gas pressure in the cylinder space 35, 3fi! equal to the drive pressure of the main piston 2, since this cylinder space 35, 36 is connected to the hydraulic pressure reservoir 30 via a line 37, 38. The load on the return valve 18, I ¹ J therefore always corresponds to the claw exerted on the main piston 2. The spring 16, J7 can be replaced by a rigid element.

In the state shown, the switch is switched on, and the Flaupti'yünderraum 7 and the Damping cylinder space 9 are then via the channels 25 and 27 and the shut-off valve 29 with the below High pressure reservoir 30 connected. Furthermore, the master cylinder space 6 is above the Channel 24 and the shut-off valve 28 with the outside air or the low-pressure space in connection, and tier damping cylinder space 8 is closed.

If the switch is to be switched off, the coupled shut-off valves 28, 29 are closed by one Angle of 60 'rotated so that the master cylinder space 6 and the damping cylinder space 8 with the Reservoir 30 connected, the master cylinder chamber 7 and the damping cylinder chamber 9 with the Outside air or the low-pressure chamber connected and the channel 27 to the damping cylinder chamber 9 is closed. The piston 2, 10, 11 and the with these through the piston rod 3 gc-Iktippe! '. E Switching contacts are then moved upwards with great force and accelerated until the The damping piston 11 penetrates into the damping cylinder space 9 and compresses the gas located therein. This compression puts such a great braking force on the moving Parts 2, 3, 10, 11 state that the speed of the same decreases almost to zero. Of the To this end, the pressure of the gas in the damping cylinder space 9 must rise to a value that is generally much higher as the pressure will be whichever on the damping piston 11 exerts a force that equal to that caused by the pressure of the gas in the storage container 30 claw exercised on the main piston 2 is. When this high value is detected, the check valve 19 is pushed open so that gas mis the damping cylinder space 9 is discharged and the pressure in this space suddenly drops sharply. It is ensured that before the check valve

ίο 19 is closed again, the pressure in the damping cylinder chamber 9 has fallen to a value at which the driving force is only slightly greater than that is the remaining braking force, the main piston is 2 mil slow against the Push announcement 13.

It is readily understood that the FJnchaltbewegung is braked in the same way by the motion damper 8, 10 up.- the check valve 18 when> ^J he approaches the stopper 12 Hauptkoiben. 2

In the variant according to FIG. 2, the piston 31 is 32 of the embodiment of FIG. 1 by a membrane 39 replaced by a rod 40 with is connected to the valve 41, and in FIG. 3, a bellows 42 is provided in place of the membrane 39.

Claims (1)

Claim: Piston drive that can be pneumatically pressurized on both sides for electrical circuit breakers with directly moving switching contact and with a motion damper that interacts with the piston on both sides and consists of damping pistons and damping cylinder, characterized in that the damping cylinder space (8, 9) in a manner known per se with one to the outside air or to a low-pressure room leading channel (14,15), which closes a to the damping cylinder space (8, 9) loaded check valve (18, 19) is connected and that the check valve (18, 19) is loaded by a pneumatic cushion, which is in one with the high pressure scite (30) of the pneumatic drive system connected space (35, 36) is located. In addition 1 Elatt drawings