阅读说明：本技术 一种气体绝缘电力传输装置 (Gas-insulated power transmission device ) 是由 崔兆轩 林莘 陈圣 徐建源 庚振新 邢恩阳 叶维瀚 包鹏然 于 2021-01-21 设计创作，主要内容包括：一种气体绝缘电力传输装置,包括管道壳体、三支柱绝缘子、支撑嵌件、中心套筒、微粒捕捉器及中心导体；三支柱绝缘子位于管道壳体内部,三支柱绝缘子支腿端部设有转接凹槽且槽内表面设有内螺纹；支撑嵌件外表面设有外螺纹,支撑嵌件一端与三支柱绝缘子支腿螺接,另一端与管道壳体焊接；三支柱绝缘子中心设有中心导体穿装孔；中心套筒位于三支柱绝缘子与中心导体之间；三支柱绝缘子相邻支腿之间均设有加强支撑杆且整体构成三角支架结构,支腿外轮廓面采用平滑圆弧过渡表面；微粒捕捉器采用薄壁圆筒型结构且水平布设,筒体底部依次设有格栅结构和隔板以形成屏蔽间隔层,屏蔽间隔层所在位置形成低电场区；微粒捕捉器筒体上设有支撑嵌件穿装孔。(A gas-insulated power transmission device comprises a pipeline shell, a three-post insulator, a supporting insert, a central sleeve, a particle catcher and a central conductor; the three-post insulator is positioned in the pipeline shell, the end part of a supporting leg of the three-post insulator is provided with a switching groove, and the inner surface of the groove is provided with an internal thread; the outer surface of the supporting insert is provided with external threads, one end of the supporting insert is in threaded connection with the three-post insulator supporting leg, and the other end of the supporting insert is welded with the pipeline shell; the center of the three-pillar insulator is provided with a center conductor penetrating hole; the central sleeve is positioned between the three-pillar insulator and the central conductor; reinforcing support rods are arranged between adjacent support legs of the three-pillar insulator, the three-pillar insulator integrally forms a triangular support structure, and the outer contour surfaces of the support legs adopt smooth arc transition surfaces; the particle trap adopts a thin-wall cylindrical structure and is horizontally arranged, a grid structure and a partition plate are sequentially arranged at the bottom of the cylinder to form a shielding spacing layer, and a low electric field region is formed at the position of the shielding spacing layer; the particle catcher cylinder is provided with a support insert through hole.)

1. A gas insulated power transmission device characterized by: the device comprises a pipeline shell, a three-pillar insulator, a supporting insert, a central sleeve, a particle catcher and a central conductor; the pipeline shell is of a cylindrical structure, and connecting flanges are arranged at cylinder openings at two ends of the pipeline shell; the three-post insulator is positioned in the pipeline shell, the end parts of three support legs of the three-post insulator are respectively provided with a switching groove, and the inner surface of each switching groove is provided with an internal thread; the supporting insert is of a solid cylindrical structure, external threads are arranged on the outer surface of the supporting insert, one end of the supporting insert is in threaded connection with internal threads of a switching groove at the end part of a supporting leg of the three-post insulator through the external threads, and the other end of the supporting insert is fixedly connected with the inner surface of the pipeline shell in a welding mode; a central conductor through hole is formed in the center of the three-pillar insulator, and the three-pillar insulator is sleeved on the central conductor through hole; the central sleeve is sleeved on the central conductor and is positioned in the central conductor penetrating hole of the three-post insulator, the inner surface of the central sleeve is in clearance fit with the outer surface of the central conductor, and the outer surface of the central sleeve is in clearance fit with the inner surface of the central conductor penetrating hole of the three-post insulator; the particle catcher is fixedly arranged on the inner surface of the pipeline shell where the three-post insulator is located.

2. A gas insulated electric power transmission arrangement as claimed in claim 1, characterized in that: and reinforcing support rods are arranged between adjacent support legs of the three-post insulator, and the three reinforcing support rods integrally form a triangular support structure.

3. A gas insulated electric power transmission arrangement as claimed in claim 2, characterized in that: the three-post insulator is made of epoxy resin, and the supporting legs and the reinforcing supporting rods of the three-post insulator are manufactured in an integrated vacuum casting mode.

4. A gas insulated electric power transmission arrangement as claimed in claim 1, characterized in that: the outer contour surfaces of the three support legs of the three-pillar insulator are smooth arc transition surfaces.

5. A gas insulated electric power transmission arrangement as claimed in claim 1, characterized in that: the particle catcher is of a thin-wall cylindrical structure, when the particle catcher is horizontally arranged, a grid structure is arranged at the bottom of a cylinder of the particle catcher, a partition plate is arranged between the grid structure and a pipeline shell, a shielding spacing layer is formed between the cylinder and the partition plate at the position of the grid structure, a low electric field area is formed at the position of the shielding spacing layer, and when metal particles move to the low electric field area, the metal particles fall into the lower grid structure under the action of gravity to be caught.

6. A gas-insulated electric power transmission unit as claimed in claim 5, characterized in that: three support insert through holes are formed in the barrel of the particle catcher, and the support insert through holes correspond to the support inserts in position one to one.

Technical Field

The invention belongs to the technical field of high-voltage power transmission, and particularly relates to a gas-insulated power transmission device.

Background

Compared with the traditional overhead line or transmission cable, the gas insulated metal enclosed transmission line (GIL) has the advantages of large transmission capacity, flexible arrangement, small influence of severe environment and the like, and is more and more widely used in the current high-voltage transmission field.

However, in a conventional gas insulated metal enclosed power transmission line, the length of the conductive rod can reach dozens of kilometers, and a conventional three-post insulator applied to the power transmission line is easy to break or burst, so that accidents such as bus deformation or falling can be caused, and the reason is mainly reflected in that the mechanical performance of the conventional three-post insulator is insufficient. Therefore, the mechanical performance and the electrical insulation performance of the three-post insulator directly determine the overall operation reliability of the gas insulated metal enclosed transmission line.

In addition, in the conventional gas insulated metal enclosed power transmission line, a large amount of moving metal particles exist, and the moving metal particles can cause the insulation strength of the gas insulated metal enclosed power transmission line to be greatly reduced, and can further cause air gap breakdown and surface flashover caused by particles attached to the surfaces of the three-pillar insulators, and finally cause the overall electrical performance of the gas insulated metal enclosed power transmission line to be reduced.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides the gas-insulated power transmission device, which adopts the three-post insulator with the improved structure, further enhances the mechanical property of the three-post insulator, can effectively reduce the probability of breakage or explosion of the three-post insulator, and further improves the integral operation reliability of the gas-insulated metal-enclosed power transmission line; the particle catcher is additionally arranged in the device, a low electric field area can be formed in the area where the particle catcher is located, and metal particles are caught by the particle catcher when moving to the low electric field area, so that the insulation strength of the gas insulated metal closed power transmission line is ensured, and the electrical performance of the gas insulated metal closed power transmission line is finally improved.

In order to achieve the purpose, the invention adopts the following technical scheme: a gas-insulated power transmission device comprises a pipeline shell, a three-post insulator, a supporting insert, a central sleeve, a particle catcher and a central conductor; the pipeline shell is of a cylindrical structure, and connecting flanges are arranged at cylinder openings at two ends of the pipeline shell; the three-post insulator is positioned in the pipeline shell, the end parts of three support legs of the three-post insulator are respectively provided with a switching groove, and the inner surface of each switching groove is provided with an internal thread; the supporting insert is of a solid cylindrical structure, external threads are arranged on the outer surface of the supporting insert, one end of the supporting insert is in threaded connection with internal threads of a switching groove at the end part of a supporting leg of the three-post insulator through the external threads, and the other end of the supporting insert is fixedly connected with the inner surface of the pipeline shell in a welding mode; a central conductor through hole is formed in the center of the three-pillar insulator, and the three-pillar insulator is sleeved on the central conductor through hole; the central sleeve is sleeved on the central conductor and is positioned in the central conductor penetrating hole of the three-post insulator, the inner surface of the central sleeve is in clearance fit with the outer surface of the central conductor, and the outer surface of the central sleeve is in clearance fit with the inner surface of the central conductor penetrating hole of the three-post insulator; the particle catcher is fixedly arranged on the inner surface of the pipeline shell where the three-post insulator is located.

And reinforcing support rods are arranged between adjacent support legs of the three-post insulator, and the three reinforcing support rods integrally form a triangular support structure.

The three-post insulator is made of epoxy resin, and the supporting legs and the reinforcing supporting rods of the three-post insulator are manufactured in an integrated vacuum casting mode.

The outer contour surfaces of the three support legs of the three-pillar insulator are smooth arc transition surfaces.

The particle catcher is of a thin-wall cylindrical structure, when the particle catcher is horizontally arranged, a grid structure is arranged at the bottom of a cylinder of the particle catcher, a partition plate is arranged between the grid structure and a pipeline shell, a shielding spacing layer is formed between the cylinder and the partition plate at the position of the grid structure, a low electric field area is formed at the position of the shielding spacing layer, and when metal particles move to the low electric field area, the metal particles fall into the lower grid structure under the action of gravity to be caught.

Three support insert through holes are formed in the barrel of the particle catcher, and the support insert through holes correspond to the support inserts in position one to one.

The invention has the beneficial effects that:

according to the gas-insulated power transmission device, the three-post insulator with the improved structure is adopted, so that the mechanical performance of the three-post insulator is further enhanced, the probability of breakage or explosion of the three-post insulator can be effectively reduced, and the overall operation reliability of the gas-insulated metal-enclosed power transmission line is further improved; the particle catcher is additionally arranged in the device, a low electric field area can be formed in the area where the particle catcher is located, and metal particles are caught by the particle catcher when moving to the low electric field area, so that the insulation strength of the gas insulated metal closed power transmission line is ensured, and the electrical performance of the gas insulated metal closed power transmission line is finally improved.

Drawings

Fig. 1 is a perspective view of a gas insulated power transmission device of the present invention;

fig. 2 is an axial sectional view of a gas insulated power transmission device of the present invention;

fig. 3 is a perspective view of a three post insulator of the present invention;

FIG. 4 is a perspective view of the particle trap of the present invention;

in the figure, 1-pipeline shell, 2-three-post insulator, 3-supporting insert, 4-central sleeve, 5-particle trap, 6-central conductor, 21-supporting leg, 22-switching groove, 23-central conductor through hole, 24-reinforcing supporting rod, 51-cylinder, 52-grid structure, 53-clapboard, 54-supporting insert through hole.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in fig. 1 to 4, a gas insulated power transmission device includes a pipe housing 1, a three-post insulator 2, a support insert 3, a center sleeve 4, a particle trap 5, and a center conductor 6; the pipeline shell 1 is of a cylindrical structure, and connecting flanges are arranged at cylinder ports at two ends of the pipeline shell 1; the three-post insulator 2 is positioned inside the pipeline shell 1, the end parts of three support legs 21 of the three-post insulator 2 are respectively provided with a switching groove 22, and the inner surface of each switching groove 22 is provided with an internal thread; the supporting insert 3 is of a solid cylindrical structure, external threads are arranged on the outer surface of the supporting insert 3, one end of the supporting insert 3 is in threaded connection with internal threads of a supporting leg end switching groove 21 of the three-post insulator 2 through the external threads, and the other end of the supporting insert 3 is fixedly connected with the inner surface of the pipeline shell 1 in a welding mode; a central conductor penetrating hole 23 is formed in the center of the three-post insulator 2, and the three-post insulator 2 is sleeved on the central conductor 6 through the central conductor penetrating hole 23; the central sleeve 4 is sleeved on the central conductor 6 and is positioned in the central conductor penetrating hole 23 of the three-post insulator 2, the inner surface of the central sleeve 4 is in clearance fit with the outer surface of the central conductor 6, and the outer surface of the central sleeve 4 is in clearance fit with the inner surface of the central conductor penetrating hole 23 of the three-post insulator 2; the particle trap 5 is fixedly arranged on the inner surface of the pipe housing 1 where the three-post insulator 2 is located. Specifically, the central sleeve 4 can eliminate the gap between the central conductor penetrating hole 23 of the three-post insulator 2 and the central conductor 6, so that the stress area of the three-post insulator 2 can be increased, and the supporting effect of the three-post insulator 2 on the central conductor 6 can be enhanced.

Reinforcing support rods 24 are arranged between adjacent support legs 21 of the three-post insulator 2, and the three reinforcing support rods 24 integrally form a triangular support structure. Specifically, after the triangular support structure is integrally formed by the three reinforcing support rods 24, the mechanical performance of the three-post insulator 2 can be greatly improved, the maximum stress borne by the three-post insulator is correspondingly increased, and the three-post insulator 2 can be effectively prevented from deforming and the supporting leg 21 from being broken.

The three-post insulator 2 is made of epoxy resin, and the supporting legs 21 and the reinforcing supporting rods 23 of the three-post insulator 2 are manufactured in an integrated vacuum casting mode. Specifically, considering the cost in terms of material usage, since the triangular bracket structure is added to the three-post insulator 2, the volume of the leg portion 21 can be reduced accordingly, and therefore, there is no difference in material usage from before the structural improvement, and therefore, the cost of the three-post insulator 2 is unchanged before and after the structural improvement.

The outer contour surfaces of the three support legs 21 of the three-post insulator 2 are smooth arc transition surfaces. Specifically, after the outer contour surface of the supporting leg 21 adopts a smooth arc transition surface, the situation that the electric field intensity of the supporting leg 21 of the three-post insulator 2 close to the side surface of the pipeline shell 1 is too large is reduced to a certain extent, and meanwhile, the insulating property of the three-post insulator 2 is ensured within a reasonable range.

The particle catcher 5 is of a thin-wall cylindrical structure, when the particle catcher 5 is horizontally arranged, a grid structure 52 is arranged at the bottom of a cylinder body 51 of the particle catcher 5, a partition plate 53 is arranged between the grid structure 52 and the pipeline shell 1, a shielding spacing layer is formed between the cylinder body 51 and the partition plate 53 at the position of the grid structure 52, a low electric field region is formed at the position of the shielding spacing layer, and when metal particles move to the low electric field region, the metal particles fall into the grid structure 52 below under the action of gravity to be caught. Specifically, when the pipe housing 1 is in zero potential when contacting the ground, and is in the vicinity of the low electric field region formed by the particle trap 5, since the electric field suddenly decreases, the electric field force applied to the metal particles moving to the low electric field region also decreases accordingly, and at this time, under the action of gravity, the metal particles or the metal particles naturally fall into the lower grid structure 52 and cannot move continuously, so that the metal particles are trapped, and the problems of insulation breakdown and the like caused by the metal particles are also reduced.

Three supporting insert penetrating holes 54 are formed in the barrel of the particle catcher 5, and the supporting insert penetrating holes 54 correspond to the supporting inserts 3 in position one to one. Specifically, the particle trap 5 is matched with the support insert 3 through the support insert mounting hole 54 to realize good limiting, and the stability of the particle trap 5 in the using process is ensured.

When the device is actually installed, the three-post insulator 2 and the supporting insert 3 are assembled together outside the pipeline shell 1 to form a combined body, then the combined body and the matched particle trap 5 are sent to the specified position of the pipeline shell 1, and then the supporting insert 3 and the pipeline shell 1 are fixedly connected together in a welding mode. After the installation process is finished, the central sleeve 4 is firstly sleeved on the central conductor 6, and finally the central conductor 6 sleeved with the central sleeve 4 is inserted into the central conductor penetrating hole 23 of the three-post insulator 2, so that the assembly of the device is completed.

The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.