CN202616128U

CN202616128U - Fixed contact of indoor high-voltage isolating switch

Info

Publication number: CN202616128U
Application number: CN 201220275552
Authority: CN
Inventors: 郁瑾
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-30
Filing date: 2012-05-30
Publication date: 2012-12-19
Anticipated expiration: 2022-05-30

Abstract

The utility model discloses a fixed contact of an indoor high-voltage isolating switch. The fixed contact comprises a plurality of pairs of contact fingers and a magnetic lock plate, wherein the contact fingers share the same contact seat, are integral type flat-bottom U-shaped pieces, and are parallelly arranged on two sides of a screw; and the magnetic lock plate is arranged on the outer side of the contact fingers. Compared with the prior art and aiming at the problems that a pressure welding type connecting structure is adopted on contact fingers and contact seats of the existing fixed contacts, machining and assembling requirements are high, the size and accuracy of orifice edge chamfers are difficult to control, and overlarge contact surface resistance is easy to cause, innovative improvement is made. According to the fixed contact, in response to the requirement that the suitable rated current of a product is larger than 4000A, enlargement of sectional areas of contact cutters, contact fingers and contact seats is considered conventionally, besides, the structure of the fixed contact is improved emphatically.

Description

A kind of indoor high-voltage isolating switch fixed contact

[technical field]

The utility model relates to a kind of indoor high-voltage isolating switch fixed contact.

[background technology]

In the high voltage isolator Chang Zuowei power transmission and distribution loop voltage is arranged and divide, close the usefulness of circuit and isolation under the non-loaded situation, and this function mainly is based on effective connection the between moving contact and the fixed contact.Said fixed contact is made up of fingertip and touch base two parts, and the fingertip that is stamped to form by copper coin divides independently two row, and flexible fastening is installed in the static contact seat side by side in pairs.During use, moving contact supports out the fingertip of both sides by operational shock, and both fully contact the realization conducting function.

Fig. 1, Fig. 2 show the structure of existing fixed contact.The fingertip 3 of both sides, magnetic padlock plate 2 and one-sided spring base 5, spring 6 are fixedly mounted on the touch base 4 through screw rod 7, and four pairs of fingertips are shared a touch base 4.Be provided with a spherical 31 at fingertip 3 towards the bottom of facing the wall and meditating of touch base 4, the circumference of hole 41 peristomas on this spherical and the touch base forms line and contact, utilizes the active force realization fingertip 3 of spring 6 and the electrical connection between the touch base 4.During operation, the gap of two row fingertips about moving contact 8 inserts by operation power from top to bottom struts the fingertip 3 of both sides, and both fully contact the realization conducting function.But; There is following problem in the fixed contact of this structure when practical application: the one, owing to the overall structure reason of fixed contact; Be difficult to adapted in the above heavy current disconnecting switches equipment of 4000A, the 2nd, in the fixed contact processing of fingertip and touch base ball type of contact surface and assembling require very high, the particularly bad control of aperture edge chamfering size accuracy on the touch base; If a point tolerance is arranged; The resistance that will cause assembling contact-making surface is bigger than normal, and causes switch the heating phenomenon to occur in running status, sometimes even burn out fingertip and touch base.

[summary of the invention]

For solving the problems referred to above that prior art exists; The utility model aims to provide a kind of indoor high-voltage isolating switch fixed contact; After existing indoor high-voltage isolating switch is equipped the fixed contact of this structure; Not only can make product be suitable for big current work occasion, but also have processing, assembling requires low advantage.

For realizing above-mentioned purpose; The utility model has adopted following technical scheme: this indoor high-voltage isolating switch fixed contact; Comprise many to sharing a touch base, being arranged side by side fingertip in the screw rod both sides; And the magnetic padlock plate that is positioned at the fingertip outside, it is characterized in that: said many be the flat U of integral type type spare to the fingertip that is arranged side by side.

During practical implementation, on the outer wall of said flat U type spare, be provided with the clamping plate that the outer wall shape with this flat U type spare is complementary with being close to formula.

During practical implementation, a joint face of said flat U type spare, clamping plate and touch base is linked into an integrated entity by securing member locking.

During practical implementation, have a connecting piece, an end of this brace is locked by securing member with a joint face of said flat U type spare, clamping plate and touch base and is linked into an integrated entity, and the other end of this brace is the stiff end of touch base.

During practical implementation, the top of said flat U type spare has five pairs of fingertips that are arranged side by side.

Beneficial effect: compared with prior art; The utility model adopts the compression joint type syndeton to fingertip in the existing fixed contact and touch base, and processing and assembling require high, and aperture edge chamfering size accuracy is difficult to control; Occur contact-making surface resistance problem bigger than normal easily, made the novelty improvement.The utility model is fit to the needs of rated current greater than 4000A from product, considers to strengthen the sectional area of contact knife, fingertip and touch base except that routine, emphatically the structure of fixed contact is improved.

The one, adopt the fingertip of all-in-one-piece flat U type spare structure; After the technical scheme that touch base and fingertip directly are connected through securing member; Solved the prior art spherical and contacted the problem of being brought, reached that contact is reliable, contact resistance is little and purpose such as difficult heating with aperture edge line.

The 2nd, after clamping plate are set up in flat U type spare periphery; Not only make the thickness attenuation relatively of fingertip; Help reducing manufacture difficulty and cost, and be in operation, have better affinity under the supplemental support of clamping plate between fingertip and moving contact; And this affinity helps to reduce contact resistance, prolongs fingertip useful life.

The 3rd, set up a bump contacted chip, an end of brace is locked by securing member with a joint face of said flat U type spare, clamping plate and touch base link into an integrated entity, increased area of dissipation.

For deepening understanding, make further detailed description through embodiment below in conjunction with accompanying drawing to the utility model.

[description of drawings]

Fig. 1 is the main TV structure sketch map of prior art fixed contact.

Fig. 2 is the left TV structure sketch map of Fig. 1.For clearly demonstrating, the cross-section structure of moving contact that increased picture in the figure, and associated components made broken section.

Fig. 3 is the main TV structure sketch map of an embodiment of the utility model.For clearly demonstrating, the touch base among this figure has been made broken section.

Fig. 4 is the left TV structure sketch map of Fig. 3.

Among Fig. 1, Fig. 2: nut 1, magnetic padlock plate 2, fingertip 3, spherical 31, touch base 4, hole 41, spring base 5, spring 6, screw rod 7, moving contact 8.

Among Fig. 3, Fig. 4: nut 1, fingertip 10, clamping plate 20, magnetic padlock plate 30, touch base 40, spring base 5, brace 50, spring 6, securing member 60, screw rod 7.

[embodiment]

Referring to Fig. 3, Fig. 4.Five pairs of fingertips 10 roughly are flat U type spare, and are integral element, and tripe is axially expanded along screw rod 7 in its bottom, help improving stability like this, enlarge contact-making surface.All-in-one-piece fingertip 10 adopts particular manufacturing craft to be stamped to form high conformity.Be complementary with flat U type spare outer wall shape, clamping plate 20 are close to flat U type spare outer wall.The waist of fingertip 10, clamping plate 20 and magnetic padlock plate 30 is by nut 1, spring base 5, spring 6, and the assembly that screw rod 7 constitutes is done elasticity locking, and processing, assembling are all very convenient, require low.

Touch base 40 is positioned at the bottom of fingertip 40, adopts the square copper section bar of 140x100x10 to process.This touch base 40 is compared with former touch base structure, and structure is simpler, area of dissipation is bigger, helps reducing the temperature rise of contact.Simultaneously, this touch base 40 can save the Surface Machining operation, and its reason is: original structure touch base 4 complex-shaped; Can only adopt casting technique to be shaped, influenced by the casting surface roughness, each face all will pass through processing just can reach instructions for use; And the square copper material that existing structure touch base 40 adopts is a section bar; It is all very smooth to draw the surface, therefore, just can use without processing after the intercepting.

As preferably, fingertip 10 can be selected various ways for use with being connected of touch base 40.One of them: utilize the top wall level of touch base 40 to be joint face, flat U type spare, clamping plate 20 are fixedly connected on this joint face through securing member 60, locking forms whole.For increasing area of dissipation; Can set up a bump contacted chip 50; These brace 50 rectangular shapes, its end is linked into an integrated entity by securing member 60 lockings with the joint face with said flat U type spare, clamping plate 20 and touch base 40, and its other end then is fixed on touch base 40 on the insulator of isolating switch.

The foregoing description only as explanation, explain the usefulness of the utility model, and should not limit the application's protection range.

Claims

1. indoor high-voltage isolating switch fixed contact; Comprise many to sharing a touch base (40), being arranged side by side fingertip (10) in screw rod (7) both sides; And the magnetic padlock plate (30) that is positioned at fingertip (10) outside, it is characterized in that: said many be the flat U of integral type type spare to the fingertip (10) that is arranged side by side.

2. static contact structure as claimed in claim 1 is characterized in that: on the outer wall of said flat U type spare, be provided with the clamping plate (20) that the outer wall shape with this flat U type spare is complementary with being close to formula.

3. static contact structure as claimed in claim 1 is characterized in that: a joint face of said flat U type spare, clamping plate (20) and touch base (40) is linked into an integrated entity by securing member (60) locking.

4. static contact structure as claimed in claim 3; It is characterized in that: have a connecting piece; One end of this brace (50) is linked into an integrated entity by securing member (60) locking with a joint face of said flat U type spare, clamping plate (20) and touch base (40), and the other end of this brace (50) is the stiff end of touch base (40).

5. like claim 1 or 4 described static contact structures, it is characterized in that: the top of said flat U type spare has the five pairs of fingertips (10) that are arranged side by side.