CN213459246U

CN213459246U - I-shaped rail composite insulator assembly for urban rail transit and insulator thereof

Info

Publication number: CN213459246U
Application number: CN202022389724.3U
Authority: CN
Inventors: 马民; 刘娟; 简阳; 卢涛
Original assignee: Shenzhen Yinxing Insulator Electrified Railway Equipment Co ltd
Current assignee: Shenzhen Yinxing Insulator Electrified Railway Equipment Co ltd
Priority date: 2020-10-25
Filing date: 2020-10-25
Publication date: 2021-06-15
Anticipated expiration: 2030-10-25

Abstract

A composite insulator assembly of a I-shaped rail for urban rail transit and an insulator thereof are disclosed, wherein the assembly comprises an upper metal piece, a lower metal piece and an insulating core rod, a blind hole is arranged in the center of the upper end of the insulating core rod, and a first high-voltage-resistant insulating glue layer with a first preset thickness is arranged between a threaded connector and the inner bottom surface of the blind hole; the lower metal part comprises a lower rectangular connecting plate, the length and the width of the lower rectangular connecting plate are larger than the diameter of the insulating core rod, a first convex ring is arranged in the center of the connecting plate, the inner diameter of the first convex ring is matched with the outer diameter of the lower end of the insulating core rod, and the first convex ring is in compression joint with the lower end of the insulating core rod; a second high-voltage-resistant insulating glue layer with a second preset thickness is arranged between the end surface of the lower end of the insulating core rod and the upper bottom surface of the first convex ring; the upper rectangular connecting plate and the lower rectangular connecting plate are perpendicular to each other. The utility model discloses have and to satisfy high requirement, can satisfy insulator mechanical strength and each item electrical property index again.

Description

I-shaped rail composite insulator assembly for urban rail transit and insulator thereof

Technical Field

The utility model belongs to the technical field of insulator technique and specifically relates to an urban rail transit is with I-shaped rail composite insulator subassembly and insulator thereof.

Background

The insulator is a special insulating material, is used in an urban rail transit light rail DC750V system, and plays important roles of making a locomotive and a conducting bar overhead, supporting, insulating, fixing and the like. The mounting height of the insulator structure for the existing subway DC1500V system is more than 120mm (the mounting height refers to the height of the main body of the insulator, except for the connecting part of an upper metal part or/and a lower metal part), while the mounting height of the insulator for the light rail is required to be short (the mounting height is generally required to be less than 80 mm) due to the limitation of the locomotive structure and the mounting space, and the insulator can meet the requirement that the mechanical strength and various electrical performance indexes of the insulator are almost the same as the level of the insulator of the subway. If the traditional ceramic insulator is made to be too short, the mechanical strength and the electrical performance of the traditional ceramic insulator can not meet the requirements, and if the traditional composite insulator is made to be too short, the mechanical strength can meet the requirements, but the electrical performance can not meet the requirements.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems, the utility model discloses provide one kind to the society and can satisfy the high requirement, highly between 60mm-70mm, again can satisfy insulator mechanical strength and each item electric performance index's urban rail transit uses word rail composite insulator subassembly and insulator.

The technical scheme of the utility model is that: the composite insulator assembly comprises an upper metal part, a lower metal part and an insulating core rod, wherein the upper metal part is arranged at the upper end of the insulating core rod, the lower metal part is arranged at the lower end of the insulating core rod, and the upper metal part comprises a threaded connector which is exposed out of an upper rectangular connecting plate of the insulating core rod and is connected with the insulating core rod; a blind hole is formed in the center of the upper end of the insulation core rod, the threaded connector is in threaded connection with the blind hole, and a first high-voltage-resistant insulation glue layer with a first preset thickness is arranged between the threaded connector and the inner bottom surface of the blind hole; the lower metal part comprises a lower rectangular connecting plate, the length and the width of the lower rectangular connecting plate are larger than the diameter of the insulating core rod, a first convex ring is arranged in the center of the connecting plate, the inner diameter of the first convex ring is matched with the outer diameter of the lower end of the insulating core rod, and the first convex ring is in compression joint with the lower end of the insulating core rod; a second high-voltage-resistant insulating glue layer with a second preset thickness is arranged between the end surface of the lower end of the insulating core rod and the upper bottom surface of the first convex ring; the upper rectangular connecting plate and the lower rectangular connecting plate are perpendicular to each other.

As right the utility model discloses an improvement, first high voltage resistant insulating glue film with the high voltage resistant insulating glue film of second is the same, all is the insulating glue of the resistant power frequency breakdown voltage more than or equal to 2 ten thousand volts of per millimeter.

As an improvement to the invention, said first predetermined thickness and said second predetermined thickness are chosen between 1-3 mm.

As the improvement of the utility model, a groove is arranged on the lower bottom surface of the upper rectangular connecting plate, and the upper end of the insulating core rod is sleeved in the groove.

As right the utility model discloses an improvement, the threaded connection head center is equipped with the pressure release through-hole with first high-pressure resistant insulating glue layer intercommunication.

As right the utility model discloses an it is right to be equipped with the gold piece locating hole on the first bulge loop of gold piece down the lower part of insulating plug be equipped with the plug locating hole that the gold piece locating hole corresponds gold piece locating hole and plug locating hole are equipped with the locating pin.

As an improvement, the outer wall of the middle upper part of the insulating core rod is provided with at least one circle of core rod convex ring.

As an improvement, the sealing step is arranged on the outer side of the upper bottom surface of the upper rectangular connecting plate.

The utility model also provides an industrial word rail composite insulator for urban rail transit includes foretell industrial word rail composite insulator subassembly for urban rail transit.

The utility model discloses owing to adopted last gold part to stretch in insulating plug, down gold part cover is on insulating plug, and just between last gold and insulating plug to and be equipped with high pressure resistant insulating glue layer down between gold and the insulating plug. Thus, the utility model discloses an its structure mounting height of insulator can be less than 67mm, is convenient for install in narrow and small space to still solved among the prior art insulator mounting structure and be subject to the problem that the product electrical property index descends that the space is little and arouse. Through tests, the electric performance of the utility model is that the creepage distance is more than or equal to 180 mm; the peak value of the nominal lightning impulse withstand voltage is more than or equal to 50 kV; the effective value of the power frequency dry withstand voltage is more than or equal to 40 kV; the effective value of the power frequency wet withstand voltage is more than or equal to 20 kV; the salt density of the artificial pollution withstand voltage is 0.35mg/cm²/. gtoreq.4 kV. Mechanical properties: the maximum horizontal vertical line direction working load is 2kN, and the breaking load is 6 kN; the maximum horizontal working load along the line direction is 2kN, and the breaking load is 6 kN; the maximum vertical working load was 1.5kN, and the breaking load was 4.5 kN. The fastening anti-loosening torque of the upper hardware fitting and the lower hardware fitting is not less than 100 N.m.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the composite insulator assembly of the present invention.

Fig. 2 is a schematic view of a top view structure of an embodiment of the insulator of the present invention.

FIG. 3 is a schematic sectional view A-A of FIG. 2.

Fig. 4 is a schematic sectional structure view of B-B in fig. 2.

Fig. 5 is a schematic perspective view of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 1 discloses a composite insulator assembly for a word rail for urban rail transit, which includes an upper metal part 1, a lower metal part 2 and an insulating core rod 3, wherein the upper metal part 1 is arranged at the upper end of the insulating core rod 3, the lower metal part 2 is arranged at the lower end of the insulating core rod 3, and the upper metal part 1 includes a threaded connector 12 which is exposed out of an upper rectangular connecting plate 11 of the insulating core rod 3 and is connected with the insulating core rod 3; a blind hole 31 is formed in the center of the upper end of the insulating core rod 3, and the threaded connector 12 is in threaded connection with the blind hole 31, so that the length of the upper metal part 1 after being connected with the insulating core rod 3 can be shortened, and in order to meet the electrical performance, a first high-voltage-resistant insulating glue layer 321 with a first preset thickness is arranged between the threaded connector 12 and the inner bottom surface of the blind hole 31; the lower metal part 2 comprises a lower rectangular connecting plate 21 with the length and width larger than the diameter of the insulating core rod 3, a first convex ring 211 is arranged in the center of the lower rectangular connecting plate 21, the inner diameter of the first convex ring 211 is matched with the outer diameter of the lower end 32 of the insulating core rod 3, and the first convex ring 211 is in compression joint with the lower end 32 of the insulating core rod 3, so that the length of the insulating core rod 3 connected with the lower metal part 2 can be met; foretell last gold, insulating plug and the connected mode of gold down can make the utility model discloses the main part height H of the insulator of making is less than 67mm, in order to guarantee electric property the terminal surface of the lower extreme 32 of insulating plug 3 with be equipped with the resistant high-pressure insulation glue film 22 of second of predetermined thickness between the last bottom surface of first bulge loop 211, go up rectangle connecting plate 11 with rectangle connecting plate 21 mutually perpendicular sets up down. The utility model discloses in, first high voltage resistant insulating glue layer 321 is the same with the high voltage resistant insulating glue layer 22 of second, and its electrical property satisfies the insulating glue of the resistant power frequency breakdown voltage more than or equal to 2 ten thousand volts of per millimeter. The coating thickness, i.e. said first predetermined thickness and said second predetermined thickness, is chosen between 1-3 mm. When 1mm is selected, the basic requirements are met, and if a thickness of 2mm or 3mm or a thickness between 2 and 3mm is adopted, the electrical performance is better. The utility model provides a first high pressure resistant insulating glue layer 321 and the high pressure resistant insulating glue layer 22 of second, the high pressure insulating glue layer that uses can adopt the model of Shenzhen electric railway equipment Limited of silver star insulator in the market to be YX-BO 1's high pressure resistant insulating glue. The high-voltage-resistant insulating adhesive is divided into a component A and a component B, is prepared when in use, can be surface-dried about 4 hours after being coated, and is completely cured after 24 hours.

Preferably, a groove 111 is formed in the lower bottom surface of the upper rectangular connecting plate 11, and the upper end 31 of the insulating core rod 3 is sleeved in the groove 111, so that the mechanical strength of the insulating core rod 3 can be improved.

Because insulating plug 3 is the material of two kinds of differences with last gold 1, when the thermal expansion, the expansion coefficient of both is different, when not adopting pressure release space 131, the insulator when being heated, goes up gold 1 and can strut insulating plug broken, so the utility model discloses in, threaded connection head 13 center is equipped with the pressure release through-hole 131 with first high pressure resistant insulating glue layer 321 intercommunication, can directly arrange out in insulating well stick 3 pressure gas outside last gold 1.

Preferably, the insulating core rod 3 is an epoxy glass fiber rod.

Preferably, a metal positioning hole 2111 is provided in the first collar 211 of the lower metal fitting 2, a mandrel positioning hole 34 corresponding to the metal positioning hole 2111 is provided in the lower portion of the insulating mandrel 3, and positioning pins 212 are provided in the metal positioning hole 2111 and the mandrel positioning hole 34. By adopting the structure, the precision of the height H of the insulator can be accurately controlled so as to meet the design requirement of the insulator.

Preferably, at least one mandrel convex ring 35 is arranged on the outer wall of the middle upper part of the insulating mandrel 3, in the embodiment, the mandrel convex ring 35 is two rings, and the purpose of arranging the mandrel convex ring 35 is to improve the insulation breakdown level inside the mandrel.

Preferably, a connecting plate convex ring 214 is arranged on the outer ring of the connecting plate 21 of the lower metal part 2. The purpose of the connecting plate protrusion ring 214 and the recess 2112 is to enhance the adhesion between the silicone skirt 4 and the lower metal part 2, so as to prevent the silicone skirt 4 from bubbling due to moisture.

Preferably, a lower metal connecting hole 215 is formed at each of both ends of the connecting plate 21 of the lower metal 2 in the length direction, for connecting with other objects during installation. An upper metal connecting hole 1211 for connecting other objects is formed on the outer connecting head 12 of the upper metal 1. And a sealing step 112 is arranged on the outer side of the upper bottom surface of the upper rectangular connecting plate 11 and is used for being in sealing connection with the silica gel umbrella skirt 4.

Referring to fig. 2-5, the present invention relates to a composite insulator for urban rail transit, which comprises the above composite insulator assembly for urban rail transit.

Specifically, the urban rail composite insulator for the urban rail transit is formed by injection molding of three layers of silica gel sheds 4 on an urban rail composite insulator assembly, and heel parts 41 of the silica gel sheds 4 cover the surfaces of the insulating core rod 3 and the lower metal part 2 except for the lower bottom surface 2113.

Preferably, the thickness of the heel 41 of the silica gel umbrella skirt 4 is larger than the thickness of the outer edge 42 of the silica gel umbrella skirt 4, and the silica gel umbrella skirt 4 is in a thinner state.

All equivalent changes made by the contents of the specification and the drawings of the utility model are included in the scope of the claims of the utility model without departing from the idea of the utility model.

Claims

1. The utility model provides a city is rail composite insulator subassembly for track traffic, includes metal (1), lower metal (2) and insulating plug (3), it establishes to go up metal (1) the upper end of insulating plug (3), establish down metal (2) the lower extreme of insulating plug (3), its characterized in that: the upper metal part (1) comprises an upper rectangular connecting plate (11) exposed out of the insulating core rod (3) and a threaded connector (12) connected with the insulating core rod (3); a blind hole (31) is formed in the center of the upper end of the insulating core rod (3), the threaded connector (12) is in threaded connection with the blind hole (31), and a first high-voltage-resistant insulating glue layer (321) with a first preset thickness is arranged between the threaded connector (12) and the inner bottom surface of the blind hole (31); the lower metal part (2) comprises a lower rectangular connecting plate (21) with the length and width larger than the diameter of the insulating core rod (3), a first convex ring (211) is arranged in the center of the connecting plate (21), the inner diameter of the first convex ring (211) is matched with the outer diameter of the lower end (32) of the insulating core rod (3), and the first convex ring (211) is in compression joint with the lower end (32) of the insulating core rod (3); a second high-voltage-resistant insulating glue layer (22) with a second preset thickness is arranged between the end surface of the lower end (32) of the insulating core rod (3) and the upper bottom surface of the first convex ring (211); the upper rectangular connecting plate (11) and the lower rectangular connecting plate (21) are perpendicular to each other.

2. The composite insulator assembly for an urban rail transit rail according to claim 1, wherein: the first high-voltage-resistant insulating glue layer (321) and the second high-voltage-resistant insulating glue layer (22) are the same and are insulating glue with power frequency breakdown voltage of 2 kilovolts or more per millimeter.

3. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: said first predetermined thickness and said second predetermined thickness are chosen between 1-3 mm.

4. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: a groove (111) is formed in the lower bottom face of the upper rectangular connecting plate (11), and the upper end of the insulating core rod (3) is sleeved in the groove (111).

5. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: and a pressure relief through hole (131) communicated with the first high-voltage-resistant insulating glue layer (321) is formed in the center of the threaded connector (12).

6. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: a metal part positioning hole (2111) is formed in the first convex ring (211) of the lower metal part (2), a mandrel positioning hole (34) corresponding to the metal part positioning hole (2111) is formed in the lower portion of the insulating mandrel (3), and positioning pins (212) are arranged in the metal part positioning hole (2111) and the mandrel positioning hole (34).

7. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: and at least one circle of mandrel convex ring (35) is arranged on the outer wall of the middle upper part of the insulating mandrel (3).

8. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: the insulating core rod (3) is an epoxy glass fiber rod.

9. The composite insulator assembly for the urban rail transit rail according to claim 1 or 2, wherein: and a sealing step (112) is arranged on the outer side of the upper bottom surface of the upper rectangular connecting plate (11).

10. The utility model provides an urban rail transit is with I-shaped rail composite insulator which characterized in that: the composite insulator assembly for the urban rail transit rail comprises the composite insulator assembly for the urban rail transit rail according to any one of claims 1 to 9.