CN205508699U

CN205508699U - High voltage isolator's cloudy contact

Info

Publication number: CN205508699U
Application number: CN201620299596.4U
Authority: CN
Inventors: 闫淼江
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-12
Filing date: 2016-04-12
Publication date: 2016-08-24
Anticipated expiration: 2026-04-12

Abstract

The utility model discloses a high voltage isolator's cloudy contact. Cloudy contact includes: first electrically conductive arm, its front end forms a conic section, and this conic section's external diameter is the convergent form from the rear end to the front end, a taper ring is formed with angle and this conic section assorted mounting hole, a position circle sets up in combination department of this electrically conductive arm with this conic section, circumference evenly distributed is followed on this conic section's surface, just to a plurality of fingers that touch a plurality of rear ends of touching the finger are by this position circle restriction, wherein, this taper ring is in through this mounting hole suit in a plurality of peripherys of touching the finger, and will a plurality of touching indicates that the extrusion is in the space that forms each other with this conic section. The utility model discloses a contact subassembly is small, the contact is in large quantity, can satisfy the isolator's of heavy current service requirement, can effectively solve the problem that the contact generates heat.

Description

A kind of negative contact of high voltage isolator

Technical field

The utility model relates to a kind of high voltage isolator, in particular to a kind of high voltage isolator Negative contact.

Background technology

High voltage isolator is the electrical equipment that power system usage amount is maximum, it be used to folding have voltage and Uncharge circuit, in conversion operation mode；Or formation is evident that cut-off point will be examining in circuit Equipment of repairing is isolated with charging equipment, in order to the service work of electrical equipment is carried out safely and reliably, normally Operation is stably conducted electric current.

As a example by double-column horizontal open-type isolating switch: its structure is by current-carrying part, running part, absolutely Edge portion and operating mechanism are constituted, and running part is made up of connecting rod and rolling bearing and connector, insulation division Divide and be made up of support insulator etc..Described operating mechanism is connected with insulated part, wherein by running part Core component be current-carrying part, it includes the composition such as both sides contact, conductive arm, wire outlet seat and dust cover. Described current-carrying part is integrally fixed on insulated part, and the function of current-carrying part has two aspects, and one is conduction electricity Stream, two is to be rotatably assorted Contact Breaking/Making Operations action to realize the switching action of circuit by support insulator. Current-carrying part includes wire outlet seat and conductive arm and contact (negative contact and sun contact, or call left contact and the right side is touched Head) etc. constitute.

Described deciliter operating process is: the driving section that operating mechanism consists of connecting rod after receiving deciliter order Dividing and operating physical force passes to both sides support insulator, both sides support insulator, under the effect of driving torque, is made The rotation that the symmetry that deviates from mutually or be harmonious is contrary so that the both sides conductive arm being fixed thereon makees corresponding pendulum Dynamic so that the contact of conductive arm front end, both sides is mutually incorporated in centre or separates, both sides contact be incorporated into or Separate and be in compliance with the track that respective conductive arm front end swings and complete.

In existing self-operated type contacts Technology, apply and there is high conductivity, high elastic modulus alloy material, make Fingertip is applied in disconnecting switch.The bar type fingertip be made up of described material, and thus design is made Isolation switch contact is the most welcomed by the people with the performance characteristics such as high reliability, dust-proof good antifouling effect. This contact need not extension spring, utilizes the elastic force of fingertip self to provide contact, thus has simple in construction Feature, and eliminate the heating problem that back contact causes.

In above-mentioned self-operated type contacts Technology, the structure of contact is, fingertip is the most compacted and the good conductor system of being fixed on Become contact base on, the other end of its contact base simultaneously by conductive arm with bolt presses to constitute galvanic circle, Thus solve the heating problem of back contact.Wherein, the arrangement fixed form of fingertip mainly has following two kinds: Fingertip Symmetrical vertical is fixed on the left and right sides of conductive arm front end, or symmetry is horizontally fixed on the upper of conductive arm Lower both sides.

Owing to each fingertip of self-operated type bar type fingertip only has a contact point, and it is point cantact mode, but Owing to fingertip is arranged in the both sides of rectangular conductive arm, the positive contact of its coupling is rectangular configuration, the radial direction of contact Conductive contact then will be had a huge impact by angle slightly deviation.But point cantact mode is by electric current relatively There is in the case of little higher contact stabilization, and the effect that makes up of fingertip its own resilient makes it contact Effect makes moderate progress relative to strip fingertip, thus the impact of self-adjusting difference is relative to plane contact or two Point cantact is less.But, under big current conditions, point cantact mode is too small due to contact area, and fingertip connects Touch pressure is less it is difficult to ensure that contact reaches stable contact resistance when conductive contact, and the heating being potential is hidden Suffer from.But increase fingertip contact, it is necessary to making fingertip enlarged diameter, length increases, contact simultaneously The big abrasion dew copper that can accelerate again fingertip plated surface silver layer, and thus cause contact to generate heat.Therefore so that from The technology range of application of power formula bar type fingertip is restricted.

Theoretical according to electrotechnics, contact carrying electric current takes advantage of number of contacts equal to single contact electric current, it is evident that contact holds Carry electric current to increase with number of contacts and be incremented by, and wiper resistance increases with number of contacts and reduces, thus contact Caloric value then increases with number of contacts and declines in square multiple, thus increases number of contacts and can effectively reduce contact The heating temp of contact zone, and improve the ability of the conducting electric current of contact.But, owing to fingertip arrangement is right Claim array, i.e. contact arrangement is rectangular, be distributed in contact up and down or the column edge of the right and left, examining Consider to contact and fingertip radial alignment error big time, the fingertip contact size that may bring is unbalanced Problem.In order to make each fingertip have enough contacts, the most just require that fingertip has big resilience Amount, it is relatively big that bar type fingertip diameter typically does, and finger length is longer, so that its fingertip number is general relatively Few, it is only capable of meeting the disconnecting switch of less conducting electric current.If improved by increasing fingertip quantity Conducting electric current, will make contact oversize, then make the current-carrying part of disconnecting switch increase volume and weight, Also make insulating element and driving torque increase, and make disconnecting switch overall weight strengthen, be unfavorable for saving material Material, reduces cost.

The continuous lifting used along with power technology, the requirement of existing GB is also improving constantly.Industry supply and demand Both sides are common in the face of such a problem: although the contact contact resistance of self-operated type bar type fingertip is stable, structure Simply, reliability is high, good dustproof effect, but is only capable of meeting the isolation switch contact of carrying small area analysis, as Self-operated type bar type fingertip is applied in the disconnecting switch of big electric current by what？That is, at self-operated type bar type fingertip base Develop volume on plinth little, the structure of contact terminal that number of contacts is many, with meet big electric current disconnecting switch run want Ask.Further, simple in construction stable at contact resistance, cost is greatly lowered under conditions of reliability height, Improve service life, technique is widelyd popularize and commonly used.

Utility model content

Technical problem to be solved in the utility model is to provide the negative contact of a kind of high voltage isolator, i.e. There is provided a kind of volume little on the basis of existing self-operated type bar type fingertip, and contact point quantity be multiplied, Thus the structure of contact terminal that using effect is more reliable when load is bigger.

Technical problem to be solved in the utility model also resides in the moon providing such a high voltage isolator Contact, is easy to debugging and maintenance in installation and maintenance, with by more abundant for the technological merit of self-operated type bar type fingertip And be widely used in outdoor disconnector equipment.

To achieve these goals, the utility model provides the negative contact of a kind of high voltage isolator, its feature It is, including:

First conductive arm, its front end forms a cone section, and the outer rear end without leave forward end of this cone section is gradually-reducing shape；

One taper ring, is formed with the installing hole that angle matches with this cone section；

One centring ring, is arranged on the junction of this conductive arm and this cone section；

Multiple fingertips, are circumferentially evenly distributed on the outer surface of this cone section, and the rear end of the plurality of fingertip Limited by this centring ring；

Wherein, this taper ring is to be sleeved on the periphery of the plurality of fingertip by this installing hole, and by described Multiple fingertips are squeezed in the space mutually formed with this cone section.

In an embodiment of the present utility model, outside the conicoid of this installing hole of this taper ring is with this cone section Forming described space between surface, described space is uniform thickness and thickness and the thickness of described fingertip matches.

In an embodiment of the present utility model, the maximum gauge of the rear end of this cone section is less than this first conductive arm External diameter；And the junction between this cone section and this first conductive arm forms a chuck, this centring ring is logical Cross this chuck to be fixed on the rear end of this cone section, thus by the stop on axial location of the plurality of fingertip.

In an embodiment of the present utility model, the front end of this centring ring is formed with equally distributed multiple first Positioning tooth, forms one first locating slot between adjacent two described first positioning tooths.

In an embodiment of the present utility model, this conicoid of the front end of this installing hole is also formed with multiple Second positioning tooth, forms one second locating slot between adjacent two described second positioning tooths, and described second determines Position tooth is towards axle center.

In an embodiment of the present utility model, the quantity of described first locating slot, width and distributing position with Described second locating slot is mutually matched, and matches with the plurality of fingertip, thus limits each described fingertip In a defined location radially.

In an embodiment of the present utility model, the cone angle of this cone section and this installing hole is between 0～5 °.

In an embodiment of the present utility model, have between the periphery of this centring ring and the conicoid of this taper ring There is a gap.

In an embodiment of the present utility model, described first positioning tooth and described second positioning tooth are by radially Position cooperation relatively makes described first locating slot and described second locating slot one_to_one corresponding, thus by each described The assembly direction of fingertip and the axis of this conductive arm are maintained at same plane.

In an embodiment of the present utility model, this taper ring is non-magnetic taper ring, and this centring ring is that non-magnetic is fixed Position circle.

In an embodiment of the present utility model, the front end of the plurality of fingertip forms an inverted cone shape opening.

In an embodiment of the present utility model, the minimum diameter of this inverted cone shape opening is less than being electrically connected to one the The external diameter of the positive contact part on two conductive arms.

In an embodiment of the present utility model, described fingertip is for having resilient bar type fingertip.

To achieve these goals, the utility model also provides for the contact assembly of a kind of high voltage isolator, bag Including negative contact and sun contact, its feature is,

This negative contact is the negative contact described in the most each embodiment；

This sun contact includes one second conductive arm and is electrically connected to the positive contact part on this second conductive arm, should Sun contact part profile is round pie, and what this sun contact and this negative contact cooperatively formed this high voltage isolator can Guan Bi or the contact assembly of disjunction.

The utility model by have employed the Wedged structure of taper coupling in the fingertip rear end of negative contact, permissible Fingertip rear end the first conductive arm is made to realize the most reliably linear contact lay, thus in the situation of contact small volume Under, number of contacts can realize increasing considerably, thus improves the ability of the conducting electric current of contact.

It addition, the minimum diameter of inverted cone shape opening that the utility model surrounds also by multiple fingertips is less than being electrically connected It is connected to the external diameter of the positive contact part of the second conductive arm, fingertip can be strutted when sun contact is incorporated into negative contact, So that the elastic force that negative contact relies on rod fingertip self forms close conductive contact, this knot with sun contact Structure solves back contact heating problem.Further, owing to using circumference fingertip to avoid each to alignment error Impact on contact resistance, thus avoid the problem of maintenance debugging difficulty, and meet each fingertip and lead Cross-sectional area of conductor needed for galvanization amasss, thus greatly reduces maintenance debugging man-hour and difficulty.

Accompanying drawing explanation

For above and other purpose of the present utility model, feature, advantage can be become apparent with embodiment, Being described as follows of appended accompanying drawing:

Fig. 1 illustrates the perspective view of high voltage isolation switch contact structure of the present utility model；

Fig. 2 illustrates high voltage isolation switch contact structure of the present utility model section view in B-B direction along Fig. 3 Figure；

Fig. 3 illustrates high voltage isolation switch contact structure of the present utility model section view in A-A direction along Fig. 2 Figure；

Fig. 4 illustrates the structural perspective of centring ring in Fig. 2；

Fig. 5 illustrates the structure for amplifying profile of C portion in Fig. 2.

Detailed description of the invention

The contact assembly of high voltage isolator includes negative contact and sun contact, and the positive contact that matches of profile with Negative contact is typically use in pairs, and negative contact is fixedly connected on disconnecting switch side by the first conductive arm On wire outlet seat, sun contact is fixedly connected on opposite side wire outlet seat by the second conductive arm.The utility model master The improvement of negative contact to be related to, is shown in Fig. 1～Fig. 3, for ease of describing, below centered by contact, deviates from tactile After the direction of head is referred to as, before being referred to as towards the direction of contact.

Specifically, as shown in FIG. 1 to 3, in a preferred embodiment of the present utility model, contact assembly 100 include negative contact and sun contact.Wherein, negative contact includes the first conductive arm 10, taper ring 20, many Individual fingertip 30 and centring ring 40.The positive contact corresponding with this negative contact is by the second conductive arm 50 and is electrically connected Ground connection is arranged at the positive contact part 51 of the front end of this second conductive arm 50 and constitutes, this sun contact part 51 Profile is round pie.

This first conductive arm 10 can be cylindric, and its front end forms a cone section 11, and this cone section 11 further External diameter be to be gradually-reducing shape from rear end forward end, the top of this cone section 11 is directed towards front end.

This taper ring 20, in open column shape, is inside provided with the installing hole 21 that angle matches with this cone section 11. In one embodiment, the inner face of this taper ring 20 has relatively Small Taper, and i.e. its installing hole 21 is conicoid, The aperture of this installing hole 21 is gradually-reducing shape from rear end forward end.It is preferred that this cone section 11 and this installing hole The cone angle of 21 can be between 0～5 °.

In conjunction with Fig. 4, this centring ring 40 is in circular, and it is provided in this conductive arm 10 and this cone section 11 Junction.It is preferred that the maximum gauge of the rear end of this cone section 11 is less than the straight of this first conductive arm 10 Footpath, the junction between this cone section 11 and this conductive arm 10 is formed with a chuck 14.This centring ring 40 It is to be sleeved on the rear end of this cone section 11 by its endoporus 41, and is fixed on this cone section by this chuck 14 On the rear end of 11, in order to move at axial location at the assembling the plurality of fingertip of limit 30.

The plurality of fingertip 30 is the tool resilient bar type fingertip using self-operated type straight rod material to make, It has good electric conductivity.

In the utility model, the loss that the high-intensity magnetic field formed during in order to avoid contact conducting electric current causes, This taper ring 20 uses non-magnetic material, and this centring ring 40 is also adopted by non-magnetic material, and such as brass or non-magnetic are not Rust steel.

In the utility model, it is preferred that as shown in Figure 3 and Figure 4, the utility model is at this centring ring It was uniformly provided with the first positioning tooth 42 towards front, adjacent two institutes around one week on the end face of the front end of 40 State formation one first locating slot 43, the first locating slot 43 and fingertip 30 external diameter phase between the first positioning tooth 42 Coupling.And also it is uniformly provided with the second positioning tooth 22 at this taper ring 20 around its leading inside, described second Positioning tooth 22 also matches with fingertip 30 external diameter, forms one second between adjacent two the second positioning tooths 22 Locating slot 23, and described second positioning tooth 22 and described second locating slot 23 be all directed towards this taper ring 20 Axle center, the first described positioning tooth 42 and the described quantity of the second positioning tooth 22, distributing position, with And width matches, in order to contact installation and debugging.

When mounted, the plurality of fingertip 30 is circumferentially to be evenly distributed on the outer surface of this cone section 11, And the root of the rear end 32 of each described fingertip 30 is constrained to described first locating slot 43, coordinate this fixed Position circle 40 is stuck in this chuck 14 the axial location that can realize described fingertip 30.And this taper ring 20 is logical Cross this installing hole 21 to be wrapped on the periphery of the plurality of fingertip 30.Further, according to being arranged on this centring ring 40 pass through footpath with the mark on this taper ring 20, described first positioning tooth 42 with described second positioning tooth 22 Coordinate to relative position, make described first locating slot 43 and described second locating slot 23 one_to_one corresponding, thus Each described fingertip 30 can be limited and be in well-determined position radially, i.e. at described first positioning tooth 42 and second positioning tooth 22 restriction effect under, each described fingertip 30 can be fixed on by described first On the locus that locating slot 43 and described second locating slot 23 are limited, to realize each described fingertip The assembly direction of 30 is maintained at same plane with the axis of this conductive arm 10.Lead to this at this taper ring 20 When the rear end of electric arm 10 compresses, the rear end 32 of the plurality of fingertip is extruded to the tightest and forms self-locking, The rear end 32 of the most the plurality of fingertip is tightly fixed to the first conductive arm by this cone section and taper ring 20 On, thus between fingertip and conductive arm, define reliable and stable electrical contact.

In the utility model, when this taper ring 20 compresses to the rear end of this conductive arm 10, this taper ring The space of taper uniform thickness is formed between conicoid and the outer surface of this cone section 11 of this installing hole 21 of 20, The thickness in described space is that the thickness with described fingertip 30 matches.Further, outside due to this centring ring 40 Footpath is uncovered less than the rear end of this taper ring 20, and after installation is complete, this centring ring 40 is in this taper The internal back segment of circle 20, when this taper ring 20 compresses to the rear end of this conductive arm 10, this centring ring 40 And there is a gap 25, as shown in Figure 2 between this conicoid of the rear end of this taper ring 20.It is also preferred that the left This gap 25 is 0.5mm.And owing to gap 25 therebetween is less, it is thus possible to improve after contact The functions at conductive contact position, portion.After installation is complete, the rear end 32 of the plurality of fingertip 30 by This cone section 11, this taper ring 20 coordinate compression.

In the utility model, by the installing hole 21 of the taper outer surface of this cone section 11 He this taper ring 20 Conicoid constitute the Wedged structure of taper coupling, the plurality of fingertip 30 can be by this wedge Enter formula structure and form close installation with the first conductive arm, and the front end 31 of the plurality of fingertip 30 is formed One microcephaly inverted cone shape opening outwardly.It is preferred that the front end 31 of the plurality of fingertip 30 can be further It is bent to form a curved portions 311, and it is horn-like to surround formation, so can be easy to suitable for sun contact part 51 Profit import this inverted cone shape opening and with described fingertip 30 conductive contact.

In the utility model, the minimum diameter of described inverted cone shape opening is less than outside sun contact part 51 Footpath, so, when sun contact part 51 imports in the inverted cone shape opening that the plurality of fingertip 30 surrounds, by Fingertip 30 can be made to strut deformation in diameter difference, so that negative contact relies on elastic force and the sun of rod fingertip self Contact is formed closely, and the electrically conducting contact that can close or separate, the i.e. contact assembly of disconnecting switch.

It is preferred that after installation is complete, in the rear end 32 of described second locating slot 23 with described fingertip 30 Outer surface between leave gap 24 (with reference to Fig. 5), to avoid the described fingertip when assembling to be scratched.

To sum up, in the utility model, when being imported in negative contact by inverted cone shape opening due to sun contact, nothing Radial and axial centering need to be adjusted, can realize all fingertips deform uniformly have between fingertip identical Contact, it is entirely avoided contact two-part alignment error problem, thus the change of fingertip after contact importing Shape amplitude has only to meet its contact, it is not necessary to consider the uneven required deformation increased of fingertip contact Amount, therefore the deformation of fingertip is without very big, thus the length of fingertip and diameter can significantly reduce, and thus touch Exponential quantity can increase considerably.And in fingertip rear end owing to have employed the Wedged structure of taper coupling, can So that fingertip rear end realizes the most reliably linear contact lay with conductive arm.Thus in the situation of contact small volume Under, number of contacts can realize increasing considerably.Thus improve the ability of the conducting electric current of contact.

It addition, this structure of contact terminal of the present utility model not only solves back contact heating problem, and, by In using circumference fingertip to avoid each impact to alignment error on contact resistance, thus avoid The problem of maintenance debugging difficulty.

In above-mentioned disclosed each embodiment, it is not limited to the utility model, the technology of any this area Personnel, without departing from spirit and scope of the present utility model, when making various changes and amendment, all may be used It is protected in the utility model.Protection domain the most of the present utility model is when regarding appending claims institute Define in the range of standard.

Claims

1. the negative contact of a high voltage isolator, it is characterised in that including:

The negative contact of high voltage isolator the most according to claim 1, it is characterised in that this taper Forming described space between conicoid and the outer surface of this cone section of this installing hole of circle, described space is uniform thickness And the thickness of thickness and described fingertip matches.

The negative contact of high voltage isolator the most according to claim 2, it is characterised in that this cone section The maximum gauge of rear end less than the external diameter of this first conductive arm；And between this cone section and this first conductive arm Junction form a chuck, this centring ring is to be fixed on the rear end of this cone section by this chuck, thus will The stop on axial location of the plurality of fingertip.

The negative contact of high voltage isolator the most according to claim 3, it is characterised in that this location The front end of circle is formed with equally distributed multiple first positioning tooth, shape between adjacent two described first positioning tooths Become one first locating slot.

The negative contact of high voltage isolator the most according to claim 4, it is characterised in that this installation Be also formed with multiple second positioning tooth on this conicoid of the front end in hole, adjacent two described second positioning tooths it Between form one second locating slot, and described second positioning tooth is towards axle center.

The negative contact of high voltage isolator the most according to claim 5, it is characterised in that described The quantity of one locating slot, width are mutually matched with described second locating slot with distributing position, and with the plurality of Fingertip matches, thus limits each described fingertip in a defined location radially.

The negative contact of high voltage isolator the most according to claim 1, it is characterised in that this cone section With the cone angle of this installing hole is between 0～5 °.

The negative contact of high voltage isolator the most according to claim 5, it is characterised in that this location Between periphery and the conicoid of this taper ring of circle, there is a gap.

The negative contact of high voltage isolator the most according to claim 5, it is characterised in that described One positioning tooth and described second positioning tooth are coordinated by diametrically opposite position makes described first locating slot with described Second locating slot one_to_one corresponding, thus the axis of the assembly direction of each described fingertip with this conductive arm is kept At same plane.

The negative contact of high voltage isolator the most according to claim 1, it is characterised in that this taper Circle is non-magnetic taper ring, and this centring ring is non-magnetic centring ring.

The negative contact of 11. high voltage isolators according to claim 1, it is characterised in that described many The front end of individual fingertip forms an inverted cone shape opening.

The negative contact of 12. high voltage isolators according to claim 11, it is characterised in that should fall The minimum diameter of conical mouths is less than the external diameter of the positive contact part being electrically connected on one second conductive arm.

The negative contact of 13. high voltage isolators according to claim 1, it is characterised in that described tactile Refer to as having resilient bar type fingertip.