CN214255414U

CN214255414U - Bi-pass sleeve

Info

Publication number: CN214255414U
Application number: CN202022877532.7U
Authority: CN
Inventors: 李国强; 周顺彪
Original assignee: XIAMEN HUANYUAN ELECTRIC POWER TECHNOLOGY CO LTD
Current assignee: Xiamen Huanyuan Power Technology Co.,Ltd.
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-09-21
Anticipated expiration: 2030-12-04

Abstract

The utility model relates to the technical field of electrical equipment, concretely relates to bi-pass sleeve pipe, including insulator, this internal high voltage conductor and the shielding net of being provided with of insulator, its characterized in that: the insulation body is T-shaped, the shielding net is sleeved in the high-voltage conductor, the insulation body comprises a first end face and a second end face, the high-voltage conductor is connected with the cable and cable accessories in an L shape from the first end face to the second end face, the bi-pass sleeve is provided with a blocking face close to the lower side of the first end face in a surrounding mode, and when the integral structure is designed, the grounding shielding net is additionally arranged at the position with high electric field intensity and the thickness of the insulation layer is increased through calculation and simulation. The electric field structure is adjusted through the grounding shielding net, the whole electric field intensity of the connecting end of the grounding shielding net and the switch is reduced, the electrical performance requirement is met, a small phase distance is kept, the miniaturization requirement is met, the probability of surface phase-to-phase faults is met, and the power supply requirements of looped networks such as national power grids, southern power grids, cities and factories are met.

Description

Bi-pass sleeve

Technical Field

The utility model relates to the technical field of electrical equipment, concretely relates to bi-pass sleeve pipe.

Background

In medium-voltage distribution networks, medium-voltage network switch equipment is characterized in that the external insulation medium mainly comprises air insulation, gas insulation and solid insulation.

A gas insulated metal enclosed switchgear (C-GIS for short) is a novel switchgear used in 10-35 kV or higher voltage power transmission and distribution system to receive or distribute electric energy and perform control, protection, measurement, monitoring, communication and other functions under normal operation and fault conditions of the power system. The insulation technology and the sealing technology of SF6 of GIS are organically combined with the manufacturing technology of air-Insulated metal-enclosed switchgear, each high-voltage element is arranged in a box-shaped sealed container, so that insulating Gas with lower pressure is filled in the box-shaped sealed container, and a complete set of series products manufactured by modern processing means are called cabinet type Gas-Insulated metal-enclosed switchgear, which is called C-GIS (Gas Insulated switchgear for short), and commonly called an inflatable cabinet is called a C-GIS and an inflatable ring main unit as a general name.

The C-GIS is a product of the development of low-pressure gas insulation, composite insulation and solid insulation technologies. The product has small volume (1/4), is maintenance-free, is not influenced by the external use environment, and is particularly suitable for being used in severe environments such as high altitude, high humidity, high dust and the like. The core component is an insulating part.

The double-pass sleeve meets the requirements of the looped network cabinet access line adopting the gas insulation medium on the ground and the interphase insulation performance.

The main drawbacks with the conventional solutions are:

1. the product has large volume, heavy weight and large occupied area;

2. the discharge is easy to occur under the conditions of humidity and dirt due to the restriction of the use environment;

3. because of the restriction of the use environment, the maintenance-free operation can not be realized;

4. the conditions of use are limited by altitude.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bi-pass sleeve pipe, it mainly adjusts the electric field structure through the ground connection shielding net, will with the whole electric field intensity reduction of switch link, satisfies the electrical property requirement, keeps less looks interval simultaneously, satisfies the miniaturization requirement, the probability scheduling technical problem of the alternate trouble in surface.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

the utility model provides a bi-pass sleeve pipe, includes insulator, be provided with high voltage conductor and shielding net in the insulator, insulator is T shape, shielding net cover is located in the high voltage conductor, insulator includes first terminal surface and second terminal surface, high voltage conductor certainly first terminal surface arrives the second terminal surface is personally submitted L shape and is connected with cable and cable accessories, the bi-pass sleeve pipe is close to first terminal surface downside ring and is equipped with the shutoff face.

Further, the shutoff face is provided with mounting nut, mounting nut is connected with the shielding net, the bi-pass sleeve pipe still includes the third terminal surface, the third terminal surface is the installation face, the mounting hole has been seted up on the installation face, insulator's material is epoxy, insulator adopts the automatic pressure gel forming technology shaping of epoxy, clearance has between shielding net and the high-voltage conductor

Furthermore, the gap is filled with an insulator, the insulator and the insulating body are integrally formed, and the outer surface of the insulating body is subjected to sand blasting treatment.

Bi-pass sleeve pipe, have following advantage:

when the whole structure is designed, the grounding shielding net is additionally arranged at the position with high electric field intensity and the thickness of the insulating layer is increased through calculation and simulation. The electric field structure is adjusted through the grounding shielding net, the whole electric field intensity of the connecting end of the grounding shielding net and the switch is reduced, the electrical performance requirement is met, meanwhile, a small phase distance is kept, the miniaturization requirement is met, and the probability of surface interphase faults is met.

Drawings

Fig. 1 is a cross-sectional view of a two-way bushing according to an embodiment of the present invention.

Figure 2 is a first side partial cross-sectional view of a two-way cannula of an embodiment of the present invention.

Figure 3 is a second side view of a two-way cannula of an embodiment of the present invention.

Description of reference numerals: 1. an epoxy resin insulating layer; 2. a shielding mesh; 3. a conductor; 4. a conductor first end face; 5. a mounting surface; 6. plugging the surface; 7. a second end surface of the conductor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-3, the present embodiment discloses a two-way bushing, which includes an insulating body, and a high-voltage conductor 3 and a shielding net 2 are disposed in the insulating body, and is characterized in that: the high-voltage conductor is characterized in that the insulation body is T-shaped, the shielding net 2 is sleeved in the high-voltage conductor 3, the insulation body comprises a first conductor end face 4 and a second conductor end face 7, the high-voltage conductor 3 is connected with a cable and cable accessories in an L shape from the first conductor end face 4 to the second conductor end face 7, and a blocking face 6 is annularly arranged on the lower side of the bi-pass sleeve close to the first end face.

From the above description, the extremely uneven electric field is changed into a slightly uneven electric field through the shielding net 2, the safety margin is improved due to the shielding effect, and the straight-through sleeve of the solid cabinet can safely pass through the metal plate; the electric field structure is adjusted through the high-voltage shielding net 2, the overall electric field intensity is reduced, the electrical performance requirement is met, meanwhile, the relative SF6 gas switch phase distance is unchanged, the miniaturization requirement is met, and the probability of phase-to-phase faults is reduced.

The plugging surface is provided with a mounting nut, and the mounting nut is connected with the shielding net 2.

The double-pass sleeve further comprises a third end face, the third end face is a mounting face 5, and mounting holes are formed in the mounting face 5.

The insulation body is made of epoxy resin, the epoxy resin insulation layer 1 is formed, and the insulation body is formed by adopting an epoxy resin automatic pressure gel forming process.

From the above description, it can be known that the through casing pipe of the solid cabinet is formed into an integral structure through the epoxy resin automatic pressure gel forming process, so that the mechanical performance of the through casing pipe of the solid cabinet can be obviously improved, meanwhile, the precision of the forming through the epoxy resin automatic pressure gel forming process is higher, the size accuracy of the insulating body can be improved, the matching between a mechanism and a box body is facilitated, the contact resistance is reduced, the interchangeability is high, the number of possible partial discharge nodes is small, the service life is long, the cost is low, the weight is light, the installation is labor-saving and convenient, and the requirement of an installer is low.

More specifically the straight-through sleeve of solid cabinet still includes the high-voltage electrified display, the high-voltage electrified display passes through ground nut and is connected with shielding net 2. It can be known from the above description that, because of the adoption of the shielding net 2 structure, when the high-voltage conductor 3 is electrified, the induction capacitor generates a low-voltage electric signal, and the prompting and warning effects are achieved by connecting the high-voltage electrified display, and the switch device does not need to be specially configured with a high-voltage sensor, so that the structural simplification is realized.

The above description shows that, by adopting the epoxy resin automatic pressure gel forming process (APG), the overall mechanical performance is significantly improved, the dimensional accuracy of the product is improved by the accurate dimensional control of the die, which is beneficial to improving the matching of the conductive circuit, reducing the contact resistance and improving the interchangeability. In the whole scheme, the phase distance is small (the switch is miniaturized), the interchangeability is good, the installation is convenient, and the reliability is high.

A gap is formed between the shielding net 2 and the high-voltage conductor 3, an insulator is filled in the gap, the insulator and the insulating body are integrally formed, and the outer surface of the insulating body is subjected to sand blasting treatment.

From the above description, it can be known that, through the sand blasting treatment, the surface of the insulator obtains certain cleanliness and different roughness due to the impact and cutting action of the abrasive on the surface of the insulator, so that the mechanical properties of the surface of the insulator are improved, thereby improving the fatigue resistance of the insulator, increasing the adhesion between the insulator and the coating, prolonging the durability of the coating, and being beneficial to the leveling and decoration of the coating.

The outgoing end of the bi-pass sleeve adopts a shielding net 2 structure, one is used for indicating the electrified state of the switch, when the high-voltage conductor 3 is electrified, the induction capacitor generates a low-voltage electric signal, and the prompting and warning effects are achieved by connecting a high-voltage electrified display, and meanwhile, the bi-pass sleeve can also be used for opening and locking a switch cabinet in a five-prevention way; secondly, the extremely uneven electric field is changed into a slightly uneven electric field through the shielding net 2, the electric field intensity of the part is reduced, the sleeve can safely penetrate through the metal plate under the shielding effect to form different compartments, the conductor 3 is connected with the cable and cable accessories to output current, the other end face of the conductor 3 is connected with the movable end of the arc extinguish chamber of the circuit breaker, and the double-pass sleeve is fixed through the mounting nut. When the whole structure is designed, the grounding shielding net 2 is additionally arranged at the position with high electric field intensity and the thickness of the insulating layer is increased through calculation and simulation. Through the electric field structure of ground connection shielding net 2 adjustment, will with the whole electric field intensity reduction of switch link, satisfy the electrical property requirement, keep less looks interval simultaneously, satisfy the miniaturization requirement, the probability of the alternate trouble in surface.

The mutual position degree of the conductors 3 and the partial discharge capacity of the grounding shielding net 2 are controlled in production, the electrical aging of the insulator is reduced, the service life of the product is greatly prolonged, and the two schemes of the bi-pass bushing with the rated voltage of 12kV and the current value of 630A/1250A meet the power supply requirements of looped networks such as national power grids, southern power grids, cities and factories.

The above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; these modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention, and therefore, all other embodiments obtained by those skilled in the art without any creative effort fall within the protection scope of the present invention.

Claims

1. The utility model provides a bi-pass sleeve pipe, includes insulator, this internal high voltage conductor and the shielding net of being provided with of insulator, its characterized in that: the high-voltage conductor is characterized in that the insulating body is T-shaped, the shielding net is sleeved in the high-voltage conductor, the insulating body comprises a first end face and a second end face, the high-voltage conductor is connected with a cable and a cable accessory in an L shape from the first end face to the second end face, and a blocking face is annularly arranged on the lower side, close to the first end face, of the bi-pass sleeve.

2. Two-way bushing according to claim 1, characterized in that the blocking surface is provided with a mounting nut, which is connected with a shielding mesh.

3. The double-pass bushing according to claim 1, further comprising a third end surface, wherein the third end surface is a mounting surface, and the mounting surface is provided with mounting holes.

4. The double-pass bushing of claim 1, wherein the material of the insulator is epoxy resin, and the insulator is formed by an automatic pressure gel molding process using epoxy resin.

5. Double-pass bushing according to claim 1, characterized in that there is a gap between the shielding mesh and the high-voltage conductor.

6. The double-pass bushing of claim 5, wherein the gap is filled with an insulator, the insulator and the insulator body being integrally formed.

7. Two-way bushing according to claim 1, characterized in that the outer surface of the insulating body is sandblasted.