CN215005706U

CN215005706U - High-voltage bushing contact finger type measuring terminal

Info

Publication number: CN215005706U
Application number: CN202121054185.6U
Authority: CN
Inventors: 龙腾; 辛万鹏; 田捷元; 马金华
Original assignee: Bushing Beijing hv Electric Co ltd
Current assignee: Bushing Beijing hv Electric Co ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2021-12-03
Anticipated expiration: 2031-05-18

Abstract

The utility model provides a high-tension bushing touches finger formula measuring terminal. The terminal comprises a terminal cap, a copper core, an insulator which is arranged outside the copper core in a close fit mode, and a shell which is arranged outside the insulator in a close fit mode; the copper core extends into the terminal cap, and a contact finger is arranged at the contact part of the copper core and the terminal cap. The utility model discloses realize the electrical contact with touching the finger. The contact fingers are made of alloy copper, have strong elastic deformation and can bear large deformation force without damage. The contact finger surface is silvered, so that the contact finger can bear larger current than the traditional measuring terminal, and can bear large current to the ground in a short time.

Description

High-voltage bushing contact finger type measuring terminal

Technical Field

The utility model relates to a high-tension bushing touches finger formula measuring terminal belongs to electrical bushing technical field.

Background

With the development of the power industry, the design requirements of the high-voltage insulating bushing are more and more strict, including the design and the type selection of structural parts and components. The measuring terminal is an important part of the bushing for high voltage bushings, which shoulder the task of measuring the main insulation properties of the bushing. In the market, the style of measuring terminal is single, and the structure is various, and the structure is general more complicated, and the cooperation has the defect all the time, if seepage, generate heat, inefficacy etc. these problems need to be solved urgently.

Disclosure of Invention

The utility model aims at the problem that above-mentioned exists provides a high-tension bushing touches finger formula measuring terminal to touch and indicate to realize electrical contact. The contact fingers are made of alloy copper, have strong elastic deformation and can bear large deformation force without damage. The contact finger surface is silvered, so that the contact finger can bear larger current than the traditional measuring terminal, and can bear large current to the ground in a short time.

The above purpose is realized by the following technical scheme:

a high-voltage bushing finger-touching type measuring terminal comprises a terminal cap, a copper core, an insulator which is arranged outside the copper core in a close fit mode, and a shell which is arranged outside the insulator in a close fit mode; the copper core extends into the terminal cap, and a contact finger is arranged at the contact part of the copper core and the terminal cap.

The high-voltage bushing contact finger type measuring terminal is characterized in that the contact fingers are embedded on the copper core and protrude outwards relative to the copper core.

The high-voltage bushing touches finger formula measurement terminal, it inlays to touch the finger the terminal cap the inside with the position that the copper core corresponds just touch the finger for terminal cap inside is inside protruding.

The high-voltage bushing contact finger type measuring terminal is characterized in that a through hole is formed in the middle of the copper core along the axial direction, and a step matched with the insulator is machined outside the copper core.

The high-voltage bushing touch finger type measuring terminal is characterized in that the lower part of the terminal cap is of an internal thread structure and is used for being connected with the shell in a threaded fit mode.

The high-voltage bushing contact finger type measuring terminal is characterized in that a first O-shaped sealing ring is arranged between the copper core and the insulator, a second O-shaped sealing ring is arranged at the bottom of the insulator, and a rectangular sealing ring is arranged between the shell and the terminal cap.

Has the advantages that:

1. the electrical contact is realized with a finger. The contact fingers are made of alloy copper, have strong elastic deformation and can bear large deformation force without damage. The contact finger surface is silvered, so that the contact finger can bear larger current than the traditional measuring terminal, and can bear large current to the ground in a short time. The insulating part of the measuring terminal is tightly matched with the inner copper core and the outer shell, namely the size of the copper core of the matching part is slightly larger than the insulating inner hole, and the size of the outer diameter of the insulating part is slightly larger than the inner hole of the shell. The sealing function is achieved by pressing in under pressure, and in order to prevent slight leakage, sealing rings are additionally arranged among different materials. The pressure of 0.4MPa is satisfied.

2. The utility model discloses installation easy operation, it is efficient, touch to indicate to be prefabricated good of inlaying, direct screw in terminal cap can realize electrical contact, realizes the safe ground connection of whole terminal.

3. The utility model discloses an alloy copper touches and indicates that the current-carrying capacity is big, when short circuit to ground, can bear certain heavy current and do not destroy in the terminal short time. The alloy copper contact finger is wear-resistant and good in elastic deformation, and the problem of poor contact or failure can not occur after repeated plugging and unplugging.

4. The utility model discloses a selection and the novel structure of sealing method effectively prevent to come from the little infiltration of the inside gas of casing flange or oil.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

In the figure: 1. a copper core; 2. an insulator; 3. a terminal cap; 4. a housing; 5.1, a contact finger; 5. a contact finger; 6. a first O-ring seal; 7. a rectangular sealing ring; 8. and a second O-shaped sealing ring.

Detailed Description

As shown in fig. 1: the high-voltage bushing contact finger type measuring terminal comprises a terminal cap 3, a copper core 1, an insulator 2 and a shell 4, wherein the insulator 2 is installed on the outer side of the copper core in a close fit mode; the inside of the terminal cap is provided with a step-shaped structure matched with the copper core, the insulator and the shell, and a contact finger 5 is arranged at the contact part of the copper core, which extends into the terminal cap, and the terminal cap.

As shown in fig. 1, the high voltage bushing finger type measuring terminal has the contact finger embedded on the copper core and protruding outward relative to the copper core.

Example 2:

as shown in fig. 2, this embodiment is different from embodiment 1 in that the high-voltage bushing finger-type measurement terminal is embedded in the terminal cap at a position corresponding to the copper core and the finger protrudes inward relative to the inside of the terminal cap.

The utility model provides a copper core 1 is the copper product matter, and the centre is the through-hole, is equipped with the step, inserts in insulating, with insulating close-fitting, and have the sealing washer between insulating. The upper end of the contact finger is provided with a groove, and the upper end of the contact finger is provided with a polished rod. The central through hole needs to be penetrated with an outgoing line from the sleeve and welded firmly; the insulator 2 is made of polytetrafluoroethylene and is tightly matched with the copper core, a sealing ring is arranged at the matching position of the insulator and the copper core, and the insulator is also tightly matched with the shell; the terminal cap 3 has two forms, one with an internal slot for inserting a contact finger, and the other with a smooth inner wall. The lower end is an internal thread structure and is in threaded fit with the shell. Silver plating or tin plating is carried out on the contact part; the shell 4 is made of copper materials and is in close fit with the insulation, and a threaded hole is formed in the shell and is connected with the sleeve flange through a bolt; the contact finger 5 is made of an alloy copper material and has better elastic deformation, is embedded into a groove formed in the terminal cap, is in an inward convex form and is electrically contacted with a copper core of the polished rod, or is embedded into a groove formed in the copper core, is in an outward convex form and is electrically contacted with the copper core of the polished rod; the first O-shaped sealing ring realizes the sealing effect between the copper core and the insulation; the rectangular sealing ring realizes the sealing effect between the terminal cap and the shell and prevents rainwater from entering; a second O-shaped sealing ring: and sealing the terminal and the sleeve is realized.

The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, but also comprises the technical scheme consisting of the equivalent replacement of the technical features. The present invention is not to be considered as the best thing, and belongs to the common general knowledge of the technicians in the field.

Claims

1. The utility model provides a high-voltage bushing touches finger formula measurement terminal which characterized by: the terminal comprises a terminal cap, a copper core, an insulator which is arranged outside the copper core in a close fit mode, and a shell which is arranged outside the insulator in a close fit mode; the copper core extends into the terminal cap, and a contact finger is arranged at the contact part of the copper core and the terminal cap.

2. The high voltage bushing finger contact measurement terminal of claim 1, wherein: the contact fingers are embedded on the copper core and protrude outwards relative to the copper core.

3. The high voltage bushing finger contact measurement terminal of claim 1, wherein: the contact finger is embedded in the terminal cap at a position corresponding to the copper core, and the contact finger protrudes inwards relative to the inside of the terminal cap.

4. A high voltage bushing finger contact measurement terminal as claimed in claim 1, 2 or 3, wherein: and a through hole is formed in the middle of the copper core along the axial direction, and a step matched with the insulator is machined outside the copper core.

5. A high voltage bushing finger contact measurement terminal as claimed in claim 1, 2 or 3, wherein: the lower part of the terminal cap is of an internal thread structure and is used for being connected with the shell in a threaded fit mode.

6. A high voltage bushing finger contact measurement terminal as claimed in claim 1, 2 or 3, wherein: a first O-shaped sealing ring is arranged between the copper core and the insulator, a second O-shaped sealing ring is arranged at the bottom of the insulator, and a rectangular sealing ring is arranged between the shell and the terminal cap.