CN205282374U - A contact support, a contact assembly using the support, and a vacuum interrupter - Google Patents

Abstract

The utility model discloses a contact support piece, a contact assembly using the support piece, and a vacuum interrupter. The contact assembly includes a conductive rod and a contact piece fixed on its end. The contact piece is provided with evenly spaced grooves along the circumferential direction and split petals between two adjacent grooves. The back of the contact piece and the A support is fixed between the conductive rods, and the support includes a conductive ring fixed on the conductive rod. The conductive ring has an outer peripheral surface arranged between the outer peripheral edge of the contact piece and the groove bottom of the groove and the contact piece On the contact end surface of the back conductive contact, there is an escape groove extending along the same direction as the corresponding part of the groove of the contact piece and not narrower than the groove on the contact end surface. The support plays a reinforcing role on the back of the contact piece, so that the central part of the contact piece is directly fixed on the conductive rod, and the split part is supported by the solid part between the adjacent avoidance grooves of the conductive ring, which ensures The overall structural strength of the entire contact assembly.

Description

A contact support, a contact assembly using the support, and a vacuum interrupter

technical field

The utility model relates to a contact support piece, a contact assembly using the support piece, and a vacuum interrupter.

Background technique

At present, there are two types of contact structures for 12kV series vacuum interrupters, one is a transverse magnetic field contact, and the other is a longitudinal magnetic field contact. Among them, there are spiral or Swastika-shaped grooves on the contact piece where the transverse magnetic field comes out. This type of groove makes the breaking ability of the transverse magnetic field better than that of the longitudinal magnetic field, which is conducive to the miniaturization and low cost of the vacuum interrupter. More and more manufacturers favor. However, the structural strength of the transverse magnetic field contact and the generated magnetic induction are contradictory, that is, the longer the path of the slot on the transverse magnetic field contact, the stronger the magnetic induction, but the lower the structural strength of the contact. The electrical life under the short-circuit breaking current will be shorter, so the transverse magnetic field contacts used in the existing vacuum interrupter have the defects of poor magnetic induction performance and poor structural strength.

Utility model content

The purpose of the utility model is to provide a contact support which improves the structural strength of the contact, and also provide a contact assembly using the support and a vacuum interrupter using the contact assembly.

In order to achieve the above purpose, the technical solution of the contact support in the utility model is as follows:

The contact support includes a conductive ring used to be sleeved and fixed on the conductive rod. The conductive ring has an outer peripheral surface for being arranged between the outer peripheral edge of the contact piece and the groove bottom of the groove and for connecting with the contact piece. The contact end surface of the back conductive contact is provided with an escape groove for extending along the same direction as the corresponding part of the groove of the contact piece and not narrower than the groove.

The escape groove runs through the two end faces of the conductive ring.

The conductive ring is a machined or punched stainless steel plate.

The technical scheme of the contact assembly in the utility model is as follows:

The contact assembly includes the conductive rod and the contact piece fixed on the end. The contact piece is provided with grooves evenly spaced along the circumference and a split valve between two adjacent grooves, and defines the contact piece. The end face of one end connected to the conductive rod is the back, and the end face used to cooperate with the other contact assembly is the front. A support is fixed between the back of the contact piece and the conductive rod, and the support includes a sleeve fixed on the conductive rod. Conductive ring, the conductive ring has an outer peripheral surface arranged between the outer peripheral edge of the contact piece and the groove bottom of the groove and a contact end surface in conductive contact with the back side of the contact piece, and the contact end surface is provided with a groove with the contact piece The corresponding part extends along the same direction and is not narrower than the escape groove of the groove.

The escape groove runs through the two end faces of the conductive ring.

The outer peripheral edge of the support member is located at half of the groove depth of the groove on the contact piece.

Both the supporting piece and the conductive rod and between the supporting piece and the contact piece are welded and fixedly connected.

The technical scheme of the vacuum interrupter in the utility model is as follows:

Vacuum interrupter, including two contact assemblies for opening and closing relative to each other in the axial direction. The contact assembly includes a conductive rod and a contact piece fixed on its end. The groove and the split between two adjacent grooves, and define the end face of the contact piece connected to the conductive rod as the back, and the end face used to cooperate with another contact assembly as the front, the back of the contact piece and the A support is fixed between the conductive rods, and the support includes a conductive ring fixed on the conductive rod. The conductive ring has an outer peripheral surface arranged between the outer peripheral edge of the contact piece and the groove bottom of the groove and the contact piece On the contact end surface of the back conductive contact, there is an escape groove extending along the same direction as the corresponding part of the groove of the contact piece and not narrower than the groove on the contact end surface.

The escape groove runs through the two end faces of the conductive ring.

The outer peripheral edge of the support member is located at half of the groove depth of the groove on the contact piece.

In the utility model, the supporting member plays a reinforcing role on the back of the contact piece, so that the central part of the contact piece is directly fixed on the conductive rod, and the split part is supported by the solid part between the adjacent avoidance grooves of the conductive ring. And because the outer diameter of the conductive ring is smaller than that of the contact piece, the impact of the avoidance groove on the conductive ring on the structural strength will be smaller than that of the groove on the contact piece, which ensures the structural strength of the support itself In this way, after the groove on the contact piece is deepened, the parting part will still be supported by the conductive piece, which ensures the overall structural strength of the entire contact assembly and avoids the problem of the overhang of the parting part of the contact piece. At the same time, the avoidance groove on the conductive ring will make the current flow track between the support member and the contact piece maintain the original track, and will not be directly transmitted between the central part of the conductive ring and the central part of the contact piece. It is ensured that the current intensity of the split part of the contact piece is not lost, and the induced magnetic field intensity of the contact piece is not lost.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a vacuum interrupter of the present invention;

Fig. 2 is a schematic diagram of the cooperative structure of the support member and the contact piece in Fig. 1;

Fig. 3 is a schematic structural diagram of the support in Fig. 1 .

detailed description

The embodiment of the vacuum interrupter in the utility model: as shown in Fig. 1 to Fig. 3, it includes two contact assemblies which are relatively separated and closed along the axial direction. 2 and contact sheet 3 constitute.

The structure of the conductive rod 1 and the contact piece 3 is the same as that of the traditional transverse magnetic field contact assembly. The end of the conductive rod 1 is provided with a shaft end thinner than the middle part, and the shaft end is inserted and welded at the center of the disc-shaped contact piece 3, and the end face of the contact piece 3 that is connected to the shaft end of the conductive rod 1 is defined as The back side and the opposite end are the front side, so that the opening and closing of the entire vacuum interrupter can be realized through the relative opening and closing of the two contact assemblies along the axial direction. The outer circumference of the contact piece 3 is provided with four helical grooves 31 uniformly distributed in the axial direction. The solid parts between the adjacent grooves 31 are split petals 32, and these split petals 32 can drive the shrinking arc to rotate through the contact piece 3, so that the heat generated by the arc can be dispersed to avoid the ablation of the contact piece 3 .

The supporting member 2 is a circular conductive ring 21 formed from a stainless steel plate by flat machining (ie, machining) or punching and flanging (ie, stamping). The conductive ring 21 is a regular circular ring, and the internal control coaxial welding of the conductive ring 21 is fixed on the outer circumference of the shaft end of the conductive rod. The edge of the ring 21 is provided with avoidance grooves 22 corresponding to the various types of grooves 31. The direction and width of the avoidance grooves 22 are the same as those of the type grooves 31. The solid part between the adjacent avoidance grooves 22 is the conductive contact finger that matches the split 32 of the contact piece. Contact the end face.

In the above embodiments, the avoidance groove is a straight through groove, and in other embodiments, the avoidance groove may also be a half-through groove that is opened on the front side of the conductive ring and closed on the back side. In addition, the avoidance groove may be shorter than the type groove. The shape of the escape groove also changes with the shape of the groove on the contact piece, that is, when the groove is a swastika groove, the escape groove is also a matching swastika groove.

In the above-mentioned embodiments, the support is welded and fixed between the conductive rod and the contact piece. In other embodiments, the support can also be fixed between the conductive rod and the contact piece by means of threaded connection, crimping, interference fit, etc. between.

Embodiment of the contact assembly in the present invention: the structure of the contact assembly in this embodiment is the same as that of the above embodiment, so it will not be repeated here.

Embodiment of the contact support in the present invention: the structure of the contact support in this embodiment is the same as that of the contact support in the above embodiment, so it will not be repeated here.

Claims (10)

1. contact strut member, it is characterized in that, comprise the conduction ring being fixed on conducting rod for being set with, conduction ring has for setting the periphery between the edge, neighboring and the bottom land of type groove of contact blade and for conducting electricity the contact end face contacted with the back side of contact blade, contact end face is offered for moving towards, along same, the escape groove extending and not being narrower than described type groove with the type groove corresponding part of contact blade.

2. contact strut member according to claim 1, it is characterised in that, escape groove runs through the two ends end face of conduction ring.

3. contact strut member according to claim 1 and 2, it is characterised in that, conduction ring is the stainless steel plate that machining or stamping-out become.

4. contact assembly, comprise contact blade fixing on conducting rod and termination thereof, point lobe that contact blade is provided with circumferentially type groove uniformly at intervals and is between adjacent amphitypy groove, and the end face defining one end that contact blade is connected with conducting rod is the back side, end face for coordinating with another contact assembly is front, it is characterized in that, it is fixed with strut member between the back side of contact blade and conducting rod, strut member comprises the conduction ring that suit is fixed on conducting rod, the contact end face that conduction ring has the periphery being arranged between the edge, neighboring of contact blade and the bottom land of type groove and contacts with the back side conduction of contact blade, contact end face is offered the type groove corresponding part with contact blade extend along same trend, and it is not narrower than the escape groove of described type groove.

5. contact assembly according to claim 4, it is characterised in that, escape groove runs through the two ends end face of conduction ring.

6. contact assembly according to claim 4 or 5, it is characterised in that, the neighboring of strut member is along groove depth 1/2nd place of the type groove being on contact blade.

7. contact assembly according to claim 4 or 5, it is characterised in that, all weld between strut member with conducting rod and between strut member with contact blade and it is connected.

8. vacuum interrupter, comprise two contact assemblies for relative deciliter vertically, contact assembly comprises contact blade fixing on conducting rod and termination thereof, point lobe that contact blade is provided with circumferentially type groove uniformly at intervals and is between adjacent amphitypy groove, and the end face defining one end that contact blade is connected with conducting rod is the back side, end face for coordinating with another contact assembly is front, it is characterized in that, it is fixed with strut member between the back side of contact blade and conducting rod, strut member comprises the conduction ring that suit is fixed on conducting rod, the contact end face that conduction ring has the periphery being arranged between the edge, neighboring of contact blade and the bottom land of type groove and contacts with the back side conduction of contact blade, contact end face is offered the type groove corresponding part with contact blade extend along same trend, and it is not narrower than the escape groove of described type groove.

9. vacuum interrupter according to claim 8, it is characterised in that, escape groove runs through the two ends end face of conduction ring.

10. vacuum interrupter according to claim 8 or claim 9, it is characterised in that, the neighboring of strut member is along groove depth 1/2nd place of the type groove being on contact blade.