CN1383170A

CN1383170A - Switch

Info

Publication number: CN1383170A
Application number: CN 02118427
Authority: CN
Inventors: E·杜尔尼; H·J·克莱斯; H·贝格
Original assignee: ABB Patent GmbH
Current assignee: ABB Patent GmbH
Priority date: 2001-04-26
Filing date: 2002-04-25
Publication date: 2002-12-04
Anticipated expiration: 2022-04-25
Also published as: DE10120447B4; CN1266725C; DE10120447A1

Abstract

The present invention discloses an electrical switch inserting into an insulating material such as castingresin or ceramic. A movable contact element is connected to a gearing passing through a tube insulation with one end open, wherein a sealing element is in the free hollow space. The sealing element is at least pressed against or glued to the inner surface of the insulating component for purposes of preventing dielectric leakage from a high potential to the earth potential.

Description

Switch

Technical field

The present invention relates to a kind of switch as described in the preamble according to claim 1.

Technical background

A kind of like this switch can be used as outdoor switch and is inserted in the earthenware, and the actuated element that wherein is used for the motion contact is passed down through a free space and guides to a transmission device.A kind of like this switch also can be a vacuum chamber in a similar fashion, and it has the electric current input and output part of arranging perpendicular to central axis; For making mobilizable contact action be provided with an actuated element, it is arranged on the longitudinal direction of central axis.If a kind of like this vacuum chamber is infused in the casting resin, to be provided with free space equally at the position of actuated element so, so that make actuated element can guide to mobilizable contact.

In order can easily core to be removed, the inner surface that free space enters the chamber in other words is designed to smooth.Opposite with outer wall, it can not be provided with gusset, around lath or similar structure because these structures all can make electric coverage lengthening.

Because climate reasons is in some country, for example China requires bigger leakage distance, this polarity part for being studied, and outer surface can satisfy; Inside does not then reach this length.The actuated element of being made by insulating material also has same requirement certainly.

Summary of the invention

Task of the present invention is to propose a kind of switch that starts listed kind, and the dielectric that wherein will get rid of on the free cavity inner wall is leaked.

This task will be finished by the described feature of claim 1 according to the present invention.

In free cavity, be provided with a potted component according to invention, its pressing or firmly stick on the inner surface at least.When selecting a kind of suitable tackifier, between inner surface and potted component, reach a kind of like this adhesion, on inwall, form leakage distance to stop or to get rid of.In addition if potted component sticks on the actuated element insecurely, then perhaps may be from high-voltage through the inner surface of free cavity to potted component, inside from the upper surface of potted component again, inner surface to the earth potential through free cavity forms a leakage distance then.The another one leakage paths is through drive link.Drive link and potted component by a kind of moulding are suitably certainly set up the leakage distance of a sufficient length.

If potted component is pasted firmly, so also can avoid leaking along drive link generation dielectric.

Under in the end a kind of situation, if potted component sticks on the inner surface and actuated element of free cavity securely, that just only need be designed into the axial width of potted component and make drive link or actuated element still can continue to move freely.The size of potted component is only pressed the dielectric breakdown strength design.

The favourable design of another kind of the present invention also can be with the foam filled free cavity of a kind of elastic foam to form potted component.Polarity part this moment complete filling foam not, so that guarantee the activity of the connection between moveable contact and electric current output, and stop foam to pierce in the gap between fixture and the movable part, the contact lever of vacuum chamber and reverse gap between the protection for example.

Also a shaped piece of being made by the rigid insulation material can be inserted in the inside, wherein this shaped piece pressing or paste the jail on the inner surface of free cavity securely.

The appended claims that other favourable technical scheme of the present invention and improvement project are seen other.

Especially this shaped piece deviates from the vacuum chamber side at it and has a lath that centers at least, and it can design according to one of claim 5 and later claim.Thereby obviously prolong along the inner surface of free cavity leakage distance through shaped piece.

The accompanying drawing that following basis illustrates four embodiment of the present invention carries out detailed narration and explanation to the present invention and other favourable technical scheme of the present invention and improvement project.

Description of drawings

Be illustrated as:

Fig. 1 to Fig. 4: represent a vertical section respectively by vacuum chamber with different sealing element.

Embodiment

Fig. 1 has represented a

vacuum chamber

10, and 11 have an electric current input component 12 in the top, and an electric current output 13 is arranged in its lower end.Stretch out a contact lever 14 from 10 li of vacuum chambers, an end of conductive strips 15 contact lever therewith is connected, and its other end then is fixed on the electric current output conductively.16 of actuated elements are connected movably on the contact lever 14, and this actuated element 16 is coupled mutually with a transmission device that is not shown specifically as yet.

Vacuum chamber 10 and electric current input and

output part

12 and 13 all are infused in casting resin 17 the insides together, wherein are connected with a cylindrical tube 18 in the lower end of vacuum chamber, and this cylindrical tube has surrounded a free cavity 19 or entered chamber 19.Enter chamber 19 through this makes actuated element 16 extend to movably contact lever 14 always.

The inner surface 20 of cylindrical tube 18 is smooth, and for fear of use a kind of foamed material 21 foam filled inner chambers 19 partly along this inner surface generation dielectric discharge, wherein between expanded material 21 and inner surface 20, be provided with suitable tackifier, so that form the joint of dielectric sealing there.What consider as foamed material 21 is a kind of elastic foam, is for example made by a kind of silicon rubber or another elastomer of suitable weather conditions.Can be with a kind of suitable subbing as tackifier.

For a film 23 of being made by elastomeric material is arranged between actuated element 16 and inner surface 20 by design shown in Figure 2, this film both had been cemented on the outer surface that also is cemented in actuated element 16 on the inner surface 20.The physical dimension of film 23 should guarantee its breakdown strength.

By the third form of implementation shown in Figure 3, potted component is exactly that a kind of its outer surface of usefulness of being made by the insulating properties material of rigidity firmly is bonded at profiled piece 24 on the inner surface 20.This profiled piece has the part 26 of a radial arrangement, and its side towards vacuum chamber 10 roughly is radial arrangement.Be connected with a cross section and be roughly Z-shaped bead 27 on this part, its 27a of first changes side 26a over to its inner surface.To connect one also be radially second portion 27b point to the outer 27a of first from vacuum chamber, and the free-ended cylindrical bead 27c that centers on drive link 16 is connected on this part 27b.As seen from Figure 3, cylindrical bead 27c asymmetricly is connected on the plate-like section 27b.

The 27a of first by two around

projection

40 and 41 surround, these two projections have different longitudinal lengths and with cylindrical bead 27c projection in the same direction.The long projection 41 that radially is positioned at the outside with respect to plate-like part 26a is asymmetric layout equally; On the figure left side this around projection 41 just directly lean against on the inner surface 20, and on a side relative, be provided with another one bead 25 with this side, it forms a groove 42 that has projection, the radial width of groove has a determined value b with position that the input and output lead is positioned at identical bus, as if this value is decreased to zero along circumference bus place over there, so bead 25 is superimposed together with projection 41.This depends on the interior profile of cylindrical tube 18.

The lath 43 that is designed to radial arrangement freely back to the end of vacuum chamber 10 of potted component or profiled piece 24, it has the radial width of asymmetric off-centre equally.

For form of implementation shown in Figure 4, profiled piece 24 has one on its outer surface around groove 28, the elastic seal ring 44 of the O shape loop-shaped of wherein just having packed into.This elastic seal ring 44 also forms engaging of a kind of dielectric sealing with inner surface 20.

For embodiment illustrated in figures 1 and 2, the outer surface of drive link 16 is designed to smooth, and for pressing Fig. 3 to form of implementation shown in Figure 4, this surface have at so-called connection position at least around gusset 16, see Fig. 3.

Claims

1. be inserted in the insulating material, the electric switch in casting resin or the pottery for example, its movably contact pass the tubulose insulating part that one one end opens wide and connect mutually with a transmission device through an actuated element, it is characterized in that, in the free cavity of insulating part, be provided with a potted component, its pressing or firmly stick on the inner surface of insulating part at least produces from high-voltage to earthy dielectric discharge via the inner surface of insulating part in order to avoiding.

2. according to the described switch of claim 1, it is characterized in that potted component flexibly and both also firmly pastes on the inner surface of insulating part, on the actuated element between high-voltage and the earth potential, produce dielectric discharge on actuated element to stop.

3. according to claim 1 or 2 described switches, it is characterized in that, for form potted component with a kind of flexible foam-filled should free cavity.

4. according to the described switch of claim 3, it is characterized in that foam is a kind of elastomer foam.

5. according to the described switch of claim 1, it is characterized in that potted component is a kind of shaped piece of being made by the non-elastic material of insulation, it firmly sticks on the inner surface of free cavity.

6. according to any described switch in the claim 1 to 5, it is characterized in that, potted component is the shaped piece made of rigid material by insulation, and is placed in around the elastic seal ring in the peripheral groove (O shape circle) for the sealing of insulating part inner surface is provided with one.

7. according to claim 5 or 6 described switches, it is characterized in that shaped piece has two axial component and radial components of being positioned on the different-diameter; On radial component deviate from the vacuum chamber side be provided with at least one around lath be used to increase leakage distance, be connected on the inner surface of free cavity to the outside free from flaw of this radial component simultaneously.

8. according to the described switch of claim 7, it is characterized in that inner axial component is longer than the axial component of outside vertically, and inner axial component exceeds exterior section deviating from the vacuum chamber side vertically.

9. according to the described switch of claim 8, it is characterized in that two laths pass through the cannelure formation of different depth.

10. according to the described switch of claim 9, it is characterized in that these laths see to have different length from a sagittal plane, and the radially outer batten wants specific diameter longer to inner batten.