CN215496329U

CN215496329U - Conducting rod

Info

Publication number: CN215496329U
Application number: CN202120634449.9U
Authority: CN
Inventors: 陆建军
Original assignee: Guangdong Anpei Power Co ltd
Current assignee: Guangdong Anpei Power Co ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2022-01-11
Anticipated expiration: 2031-03-29

Abstract

The utility model discloses a conducting rod, belonging to the technical field of transformers, comprising a conductor, an inner insulating part, an outer insulating part and a fastening component, wherein the conductor is embedded into the inner insulating part, the oil tank is provided with a mounting hole, the upper end of the conductor passes through the mounting hole to be connected with the outer insulating part, the inner insulating part and the outer insulating part respectively form a seal with the oil tank, the fastening component comprises a combination nut and a lantern ring sleeved outside the combination nut, the combination nut comprises a left half nut and a right half nut which are mutually spliced, the combination nut is in threaded connection with the middle part of the conductor, the combination nut is pressed against the outer side of the outer insulating part, the outer insulating part is pressed by adopting a spliced combination nut, the installation of the nut is not limited by the size of the upper end part of the conductor, only the left half nut and the right half nut are directly spliced on the middle part of the conductor, the lantern ring is sleeved and the combination nut is fixed, and the combination nut is rotated to press the outer insulating part, the structure and the assembly process of the conducting rod are greatly simplified.

Description

Conducting rod

Technical Field

The utility model relates to the technical field of transformers and power equipment with liquid filled in a container, in particular to a conducting rod.

Background

The conducting rod of the oil-immersed transformer is a fitting for connecting the internal and external conducting pieces of the oil tank body of the transformer, because the conducting rod is required to be detachable, the connection between the existing conducting rod and the inside and the outside of the oil tank is threaded, the contact surfaces are all in plane connection, the part of the conducting rod penetrating through the tank body is generally a cylinder, in order to ensure that the connecting parts at the two ends of the conducting rod have enough contact area, the size of the connecting parts at the two ends is larger than the diameter of the middle cylinder, the two ends of the conducting rod are both required to be provided with insulating parts, the insulation between the conducting rod and the tank body is ensured, the external insulating part is pressed on the oil tank through a nut, but because the two ends of the conducting rod are large and the middle is small under the conventional structure, the nut is difficult to assemble, therefore, a connecting terminal at the upper end of the conducting rod is generally required to be arranged to be detachable, the structure of the existing conducting rod is complex, and the assembling and disassembling process is complicated, and poor sealability and structural strength.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a conducting rod.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a conducting rod comprises a conductor, an inner insulating part, an outer insulating part and a fastening assembly, wherein the conductor is embedded into the inner insulating part, a mounting hole is formed in an oil tank relative to the conductor, the upper end of the conductor penetrates through the mounting hole to be connected with the outer insulating part, and the inner insulating part and the outer insulating part are respectively sealed with the oil tank;

the electric conductor middle part is equipped with connecting thread, fastening components includes combination nut and the lantern ring of cover establishing in the combination nut outside, and combination nut includes left half nut and the right half nut of mutual amalgamation, and the connecting thread threaded connection on combination nut and the electric conductor to combination nut supports and presses in the outer insulating part outside, and the internal diameter of lantern ring is greater than the diameter of electric conductor upper end.

Preferably, the outer side of the combined nut is circumferentially provided with an external thread, and the inner side of the lantern ring is provided with an internal thread matched with the external thread.

Preferably, the inner insulating part is provided with a guide sleeve, the guide sleeve is wrapped outside the conductor, and the guide sleeve penetrates through the mounting hole and protrudes out of the oil tank;

the inner insulation piece is provided with a first sealing piece facing one side of the inner wall of the oil tank, and the outer insulation piece is provided with a second sealing piece facing one side of the outer wall of the oil tank.

Preferably, an axially-penetrating through hole is formed in the outer insulating part, the through hole comprises a fastening section and a sealing section, the upper end of the guide sleeve is inserted into the fastening section of the through hole, an annular accommodating cavity is formed between the sealing section of the through hole and the electric conductor, and a third sealing part is arranged in the annular accommodating cavity.

Preferably, the outer insulator is provided with an annular caulking groove, and the combined nut is accommodated in the annular caulking groove.

Preferably, the upper end of the conductor is provided with a wiring terminal, and the wiring terminal and the conductor are integrated;

and a plurality of groups of fastening bayonets are circumferentially arranged on the outer side of the inner insulator, and the fasteners penetrate through the fastening bayonets to fix the inner insulator and the conductor on the inner wall of the oil tank.

The utility model has the beneficial effects that: aiming at the structure that the two ends of the conductor are large and the middle is small in the prior art, the split combined nut is adopted to compress the outer insulating part, so that the installation of the nut is not limited by the size of the upper end part of the conductor any more, when the conducting rod is assembled, only the left half nut and the right half nut are required to be directly split on the middle part of the conductor, the lantern ring is sleeved, the combined nut is fixed, and the combined nut is rotated to compress the outer insulating part, so that the structure and the assembling process of the conducting rod are greatly simplified compared with the prior art; can directly be with binding post integrated into one piece of conducting rod upper end on the conducting rod, compare in current detachable binding post, reduced the resistance of junction, can be not more than under the prerequisite of mounting hole diameter at the binding post width simultaneously, increase binding post's area as far as, increase outside wiring and binding post's area of contact avoids the contact not in place, increase resistance.

Drawings

FIG. 1 is a schematic partial cross-sectional view of example 1 of the present invention;

FIG. 2 is a front view of a fastener assembly in an embodiment of the utility model;

FIG. 3 is a perspective view of a fastener assembly in an embodiment of the utility model;

FIG. 4 is an exploded view of a fastener assembly in an embodiment of the utility model;

FIG. 5 is a schematic view showing the installation of the electric conductor and the inner insulating member in example 2 of the present invention;

FIG. 6 is a front view of an inner insulating member in embodiment 2 of the present invention;

FIG. 7 is a schematic sectional view of an inner insulating member in example 2 of the present invention;

fig. 8 is a partial cross-sectional view schematically illustrating embodiment 2 of the present invention.

In the figure, 10, a conductor; 11. connecting the convex disc; 12. a wiring terminal; 20. an inner insulating member; 21. a guide sleeve; 22. a first annular seal groove; 23. fastening a bayonet; 30. an outer insulator; 31. a second annular seal groove; 32. a fastening section; 33. a sealing section; 34. an annular caulking groove; 41. a combination nut; 42. a left half nut; 43. a right half nut; 45. an external thread; 46. a collar; 47. an internal thread; 51. a first seal member; 52. a second seal member; 53. a third seal member; 60. and an oil tank.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in fig. 1-4, the present invention provides a conducting rod, which comprises a conductive body 10, an inner insulating member 20, an outer insulating member 30 and a fastening assembly, wherein the conductive body 10 is embedded in the inner insulating member 20, the inner insulating member 20 is integrally formed on the conductive body 10, a connecting convex plate 11 is arranged at the lower end of the conductive body 10, the connecting convex plate 11 is embedded in the inner insulating member 20, the structural strength of the connection between the conductive body 10 and the inner insulating member 20 is improved by the connecting convex plate 11, a mounting hole is arranged on the oil tank 60 opposite to the conductive body 10, the upper end of the conductive body 10 passes through the mounting hole to be connected with the outer insulating member 30, the conductive body 10 passes through the outer insulating member 30, the inner insulating member 20 and the outer insulating member 30 respectively form a seal with the oil tank 60, the seal between the conductive body 10 and the tank 60 is improved by double seals, after one of the seals fails, the seal of the tank 60 is maintained by the other, the leakage of oil is avoided;

the middle part of the electric conductor 10 is provided with a connecting thread, the fastening assembly comprises a combined nut 41 and a lantern ring 46 sleeved on the outer side of the combined nut 41, the combined nut 41 comprises a left half nut 42 and a right half nut 43 which are spliced with each other, the combined nut 41 is in threaded connection with the connecting thread on the electric conductor 10, the combined nut 41 is pressed on the outer side of the outer insulating part 30, and the inner diameter of the lantern ring 46 is larger than the diameter of the upper end of the electric conductor 10.

Specifically, aiming at the structure that the two ends of the electric conductor 10 are large and the middle is small in the prior art, the split combined nut 41 is adopted to press the outer insulating part 30, so that the installation of the nut is not limited by the size of the upper end part of the electric conductor 10, when the conducting rod is assembled, only the left half nut 42 and the right half nut 43 are required to be directly split on the middle part of the electric conductor 10, the lantern ring 46 is sleeved, the combined nut 41 is fixed, the combined nut 41 is rotated to press the outer insulating part 30, and compared with the prior art, the structure and the assembling process of the conducting rod are greatly simplified; can directly be with binding post 12 integrated into one piece of conducting rod upper end on the conducting rod, compare in current detachable binding post 12, reduced the resistance of junction, can be not more than under the prerequisite of mounting hole diameter at binding post 12 width simultaneously, increase binding post 12's area as far as, increase outside wiring and binding post 12's area of contact avoids the contact not in place, increase resistance.

Further, the outer side circumference of the combined nut 41 is provided with an external thread 45, the inner side of the lantern ring 46 is provided with an internal thread 47 matched with the external thread 45, after the nut sleeve is sleeved on the combined nut 41, the external thread 45 is embedded in the internal thread 47, through the arrangement of the external thread 45 and the internal thread 47, the stability of the nut sleeve on the combined nut 41 is improved, and the nut sleeve is prevented from falling off accidentally by an external force and leading to the loosening of the external insulation part 30.

Furthermore, the inner insulating part 20 is provided with a guide sleeve 21, the guide sleeve 21 is wrapped outside the electric conductor 10, the guide sleeve 21 passes through the mounting hole and protrudes out of the oil tank 60, insulation is formed between the electric conductor 10 and the tank body of the oil tank 60 through the guide sleeve 21, and the guide sleeve 21 is gradually reduced from the lower end of the electric conductor 10 to the upper end, namely the outer diameter of the upper end of the guide sleeve 21 is smaller than that of the lower end, so that the guide sleeve 21 is more convenient to insert;

a first sealing element 51 is arranged on one side of the inner insulating part 20 facing the inner wall of the oil tank 60, and a second sealing element 52 is arranged on one side of the outer insulating part 30 facing the outer wall of the oil tank 60;

the one side that interior insulator 20 faced the oil tank 60 inner wall is equipped with first annular seal groove 22, first sealing member 51 sets up in first annular seal groove 22, outer insulator 30 is equipped with second annular seal groove 31 towards the one side of oil tank 60 outer wall, second sealing member 52 sets up in second annular seal groove 31, first sealing member 51 and second sealing member 52 are the elastic sealing ring, form double seal in the box inside and outside both sides of oil tank 60 respectively through first sealing member 51 and second sealing member 52, after one of them layer sealed the failure, through the leakproofness of another layer holding oil tank 60 box, avoid fluid seepage.

Further, an axially-penetrating through hole is formed in the outer insulating part 30, the through hole comprises a fastening section 32 and a sealing section 33, the upper end of the guide sleeve 21 is inserted into the fastening section 32 of the through hole, an annular accommodating cavity is formed between the sealing section 33 of the through hole and the electric conductor 10, a third sealing part 53 is arranged in the annular accommodating cavity, the third sealing part 53 is an elastic sealing ring, and in the screwing process of the combination nut 41, the third sealing part 53 is extruded to be deformed and filled in the annular accommodating cavity, and sealing is formed between the outer insulating part 30 and the electric conductor 10.

The assembling method of the conducting rod comprises the following steps:

s1, firstly, embedding the first sealing element 51 into the first annular sealing groove 22 of the inner insulating part 20, after one end, provided with the wiring terminal 12, of the electric conductor 10 penetrates through the mounting hole from the inner side of the oil tank 60, fixing the inner insulating part 20 and the electric conductor 10 on the inner wall of the oil tank 60 through the fastening bayonet 23 matched with the fastening fastener, and sealing the first sealing element 51 between the inner insulating part 20 and the inner wall of the oil tank 60;

s2, after the second sealing element 52 is sleeved into the electric conductor 10 from the outer side of the oil tank 60, the outer insulating element 30 is sleeved from the upper end of the electric conductor 10, and the second sealing element 52 is embedded into the second annular sealing groove 31 of the outer insulating element 30;

s3, sleeving the third sealing element 53 into the electric conductor 10, embedding the third sealing element into the annular accommodating cavity, splicing and sleeving the left half nut 42 and the right half nut 43 on the electric conductor 10, sleeving the lantern ring 46 from the upper end of the electric conductor 10, and tightly sleeving the left half nut 42 and the right half nut 43 to form the combined nut 41;

s4, turning the combination nut 41 to push the outer insulator 30 against the outer wall of the oil tank 60, after the combination nut 41 is screwed, the second sealing element 52 forms a seal between the outer insulator 30 and the outer wall of the oil tank 60, and the third sealing element 53 forms a seal between the outer insulator 30 and the electrical conductor 10, thereby completing the assembly.

Through changing the structure of current conducting rod, change the assembly methods, overcome prior art conducting rod and changeed the loaded down with trivial details problem of joining in marriage, improved the convenience of loading and unloading.

Example 2

As shown in fig. 5-8, the present embodiment is different from the above embodiments in that an annular caulking groove 34 is formed on the outer insulator, a combination nut 41 is accommodated in the annular caulking groove 34, a terminal 12 is arranged at the upper end of the electric conductor 10, and the terminal 12 is integrated with the electric conductor 10;

the outer circumference of the inner insulator is provided with a plurality of groups of fastening bayonets 23, fastening bolts penetrate through the fastening bayonets 23 to fix the inner insulator 20 on the inner wall of the oil tank 60, compress the first sealing element 51 and enable the first sealing element to be sealed between the inner insulator 20 and the tank body of the oil tank 60, the fastening bayonets 23 are U-shaped bayonets, and when the second sealing element 52 is damaged, the inner insulator 20 and the tank body of the oil tank 60 are still sealed, so that the damaged second sealing element 52 can be replaced by detaching the outer insulator 30. Compared with the existing conducting rod, the insulating parts for fixing and supporting the conductor 10 are arranged on the inner side and the outer side of the oil tank 60, so that the connecting structure strength of the conductor 10 and the tank body of the oil tank 60 is improved.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, and the scope of protection is still within the scope of the utility model.

Claims

1. The conducting rod is characterized by comprising a conductor (10), an inner insulating part (20), an outer insulating part (30) and a fastening assembly, wherein the conductor (10) is embedded into the inner insulating part (20), a mounting hole is formed in an oil tank (60) relative to the conductor (10), the upper end of the conductor (10) penetrates through the mounting hole to be connected with the outer insulating part (30), and the inner insulating part (20) and the outer insulating part (30) are respectively sealed with the oil tank (60);

the middle part of the electric conductor (10) is provided with connecting threads, the fastening assembly comprises a combined nut (41) and a sleeve ring (46) sleeved on the outer side of the combined nut (41), the combined nut (41) comprises a left half nut (42) and a right half nut (43) which are mutually spliced, the combined nut (41) is in threaded connection with the connecting threads on the electric conductor (10), and the combined nut (41) is abutted against the outer side of the outer insulating part (30).

2. The conducting rod as claimed in claim 1, characterized in that the outside of the combined nut (41) is circumferentially provided with an external thread (45), and the inside of the collar (46) is provided with an internal thread (47) which is matched with the external thread (45).

3. The conducting rod as claimed in claim 1, wherein the inner insulating part (20) is provided with a guide sleeve (21), the guide sleeve (21) is wrapped outside the conductor (10), and the guide sleeve (21) passes through the mounting hole and protrudes out of the oil tank (60);

a first sealing element (51) is arranged on one side, facing the inner wall of the oil tank (60), of the inner insulating part (20), and a second sealing element (52) is arranged on one side, facing the outer wall of the oil tank (60), of the outer insulating part (30).

4. The conducting rod according to claim 3, characterized in that the outer insulating part (30) is provided with an axially extending through hole, the through hole comprises a sealing section (33), an annular accommodating cavity is formed between the sealing section (33) of the through hole and the conductor (10), and a third sealing element (53) is arranged in the annular accommodating cavity.

5. The conducting rod according to claim 3, characterized in that the outer insulating part is provided with an annular caulking groove (34), and the combination nut (41) is received in the annular caulking groove (34).

6. The conducting rod according to claim 1, characterized in that the upper end of the conductor (10) is provided with a connecting terminal (12), and the connecting terminal (12) is integrated with the conductor (10);

and a plurality of groups of fastening bayonets (23) are arranged on the outer side of the inner insulating part in the circumferential direction, and the fastening piece penetrates through the fastening bayonets (23) to fix the inner insulating part (20) on the inner wall of the oil tank (60).