Gas-insulated power transmission mechanism

Abstract

The invention relates to the technical field of high-voltage power transmission lines, in particular to a gas insulation power transmission mechanism which comprises a power transmission pipeline, the power transmission pipeline is provided with a pipe cavity used for installing an insulator, the outer side of the pipe wall of the power transmission pipeline is connected with a collecting cover, the collecting cover is provided with a collecting cavity, and the pipe wall of the power transmission pipeline is provided with a collecting groove communicating the collecting cavity with the pipe cavity. The collecting tanks and the insulators are arranged at intervals; the gas insulation power transmission mechanism further comprises a magnetic force generating part, the magnetic force generating part is used for applying a magnetic field to the pipe cavity, and the charged particles in the pipe cavity penetrate through the collecting groove to enter the collecting cavity under the action of the magnetic field, so that the charged particles in the power transmission pipeline are captured, and the charged particles are prevented from being accumulated to the insulator.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage power transmission lines, and in particular to a gas-insulated power transmission mechanism. Background Art

[0002] Gas Insu lated Transmission-l ine (GIS) has the advantages of low loss, large transmission capacity, high reliability and easy grid interconnection. It can effectively solve the problem of transmission corridors under special terrain conditions and has broad application prospects in UHV AC and DC transmission networks.

[0003] The mechanical collisions during the production, transportation and assembly of gas-insulated switchgear, and the vibration and friction of the equipment during operation will inevitably produce metal dust or debris. In addition, the arc during the breaking process and the spark discharge that may exist during long-term operation will also cause ablation of metal parts, resulting in the presence of metal particles. The metal particles in the gas-insulated switchgear are mainly copper, aluminum and stainless steel materials in linear, spherical and powdered forms, and the size is generally in the millimeter level or even smaller. The insulated power transmission mechanism of the gas-insulated switchgear includes a power transmission pipeline and an insulator arranged in the power transmission pipeline. When the metal particles in the power transmission pipeline move in the power transmission pipeline and adhere to the surface of the insulator, it will cause local electric field distortion, change the original electric field distribution, and cause the charged particles in the power transmission pipeline to accelerate and accumulate on the surface of the insulator, causing the insulator to flash over along the surface. Therefore, a gas-insulated power transmission mechanism is needed that can prevent the charged particles in the power transmission pipeline from accumulating on the insulator. Summary of the invention

[0004] Based on this, the object of the present invention is to provide a gas-insulated power transmission mechanism capable of preventing charged particles in a power transmission pipeline from accumulating on an insulator, the gas-insulated power transmission mechanism comprising a power transmission pipeline, the power transmission pipeline having a tube cavity for installing an insulator, a collecting cover connected to the outer side of a tube wall of the power transmission pipeline, the collecting cover having a collecting cavity, a tube wall of the power transmission pipeline provided with a collecting groove connecting the collecting cavity and the tube cavity, the collecting groove being spaced apart from the insulator;

[0005] The gas-insulated power transmission mechanism further comprises a magnetic force generating element, which is used to apply a magnetic field to the lumen so that the charged particles in the lumen pass through the collecting slot and enter the collecting chamber under the action of the magnetic field.

[0006] As a preferred solution, the inner wall of the collection chamber has a porous structure.

[0007] As a preferred solution, the collecting cover comprises a porous ceramic layer and a metal reinforcement layer which are sequentially arranged from the inside to the outside.

[0008] As a preferred solution, the width of the collecting groove gradually increases from one end close to the lumen to another end close to the collecting groove.

[0009] As a preferred solution, the cross-sectional profile of the collecting tank is an isosceles trapezoidal structure.

[0010] As a preferred embodiment, the collecting chamber is a tunnel-shaped cavity parallel to the length direction of the collecting slot, a protrusion is fixed on the cavity wall of the collecting chamber facing the collecting slot, and the magnetic force generating element is connected to the protrusion.

[0011] As a preferred solution, the magnetic force generating element includes an N-pole permanent magnetic strip and an S-pole permanent magnetic strip which are sequentially arranged parallel to the length direction of the collecting slot.

[0012] As a preferred solution, the magnetic force generating member is an electromagnet fixed on two protrusions.

[0013] As a preferred solution, the collecting trough is arranged parallel to the axial direction of the power transmission pipeline.

[0014] As a preferred solution, the collecting groove is a semi-annular groove with the axis of the power transmission pipeline as its center line.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The gas-insulated power transmission mechanism of the present invention comprises a power transmission pipeline, the power transmission pipeline has a tube cavity for installing an insulator, a collecting cover is connected to the outer side of the tube wall of the power transmission pipeline, the collecting cover has a collecting cavity, the tube wall of the power transmission pipeline is provided with a collecting groove connecting the collecting cavity and the tube cavity, and the collecting groove and the insulator are arranged at intervals; the gas-insulated power transmission mechanism also comprises a magnetic force generating component, the magnetic force generating component is used to apply a magnetic field to the tube cavity, and the charged particles in the tube cavity pass through the collecting groove and enter the collecting cavity under the action of the magnetic field, thereby realizing the capture of the charged particles in the power transmission pipeline and preventing the charged particles from accumulating on the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a first axonometric view of the gas-insulated power transmission mechanism of the first embodiment of the present invention when the upper half of the power transmission pipeline is hidden;

[0018] Figure 2 It is a second axonometric view of the gas-insulated power transmission mechanism of the first embodiment of the present invention when the upper half of the power transmission pipeline is hidden;

[0019] Figure 3 A bottom view of the gas-insulated power transmission mechanism according to the first embodiment of the present invention, in which the upper half of the power transmission pipeline is hidden;

[0020] Figure 4 for Figure 3 Middle AA section view;

[0021] Figure 5 A schematic diagram of the movement paths of positively charged particles and negatively charged particles when they enter the collection chamber from the collection slot;

[0022] Figure 6 Schematic diagram of the movement path of positively charged particles after entering the collection chamber;

[0023] Figure 7 A first axonometric view of a gas-insulated power transmission mechanism according to a second embodiment of the present invention, in which the upper half of the power transmission pipeline is hidden;

[0024] Figure 8 A side view of a gas-insulated power transmission mechanism according to a second embodiment of the present invention, wherein the upper half of the power transmission pipeline is hidden;

[0025] Fig. 9 An axial cross-sectional view of a gas-insulated power transmission mechanism according to a second embodiment of the present invention, in which the upper half of the power transmission pipeline is hidden;

[0026] Fig.10 A radial cross-sectional view of a gas-insulated power transmission mechanism according to a second embodiment of the present invention, wherein the upper half of the power transmission pipeline is hidden;

[0027] In the figure, 1. power transmission pipeline, 11. tube cavity, 12. collecting trough, 2. collecting cover, 21. collecting cavity, 22. protrusion, 3. magnetic generating part, 31. N-pole permanent magnetic strip, 32. S-pole permanent magnetic strip, 4. insulator. DETAILED DESCRIPTION

[0028] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, which are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information.

[0030] Embodiment 1

[0031] like Figures 1 to 4As shown, a preferred embodiment of the gas-insulated power transmission mechanism of the present invention comprises a power transmission pipeline 1, the power transmission pipeline 1 has a lumen 11 for installing an insulator 4, a collecting hood 2 is connected to the outer side of the pipe wall of the power transmission pipeline 1, the collecting hood 2 has a collecting cavity 21, the pipe wall of the power transmission pipeline 1 is provided with a collecting groove 12 connecting the collecting cavity 21 and the lumen 11, and the collecting groove 12 is arranged at intervals from the insulator 4; the gas-insulated power transmission mechanism also comprises a magnetic force generating member 3, the magnetic force generating member 3 is used to apply a magnetic field to the lumen 11, under the action of the magnetic field, the charged particles in the lumen 11 pass through the collecting groove 12 and enter the collecting cavity 21, thereby realizing the capture of the charged particles in the power transmission pipeline 1 and preventing the charged particles from accumulating on the insulator 4.

[0032] The inner wall of the collecting chamber 21 has a porous structure. Figure 5 , Figure 6 As shown, if the inner wall of the collecting chamber 21 is a smooth surface, the charged particles entering the collecting chamber 21 from the collecting slot 12 will collide with the inner wall of the collecting chamber 21 under the action of the magnetic field and change the direction of movement after rebounding. After multiple collisions and changes of direction, the charged particles may return to the tube cavity 11 through the collecting slot 12 again, reducing the capture efficiency of the charged particles by the collecting chamber 21. In this embodiment, the inner wall of the collecting chamber 21 is set to a porous structure. After the charged particles enter the pores of the porous structure, they cannot escape from the pores of the porous structure again, thereby improving the capture effect of the charged particles. In this embodiment, the collecting chamber 21 is a tunnel-shaped cavity parallel to the slot length direction of the collecting slot 12. The cavity wall of the collecting chamber 21 facing the collecting slot 12 is fixed with a protrusion 22, and the magnetic force generating element 3 is connected to the protrusion 22. This arrangement is compact in structure, and the collecting cover 2 not only plays the role of enclosing the collecting chamber 21 with the tube wall of the power transmission pipeline 1, but also plays the role of reinforcing the slotted part of the power transmission pipeline 1. Among them, the higher the strength of the collecting hood 2, the better the reinforcement effect on the power transmission pipeline 1. In this embodiment, the collecting hood 2 includes a porous ceramic layer and a metal reinforcement layer arranged from the inside to the outside. The material of the porous ceramic layer can be selected from alumina ceramics, zirconia ceramics and other materials with high specific surface area and good thermal stability. The porous ceramic layer has a porous structure to achieve the capture of charged particles. The metal reinforcement layer is made of aluminum alloy or stainless steel. The metal reinforcement layer has good strength and toughness, which ensures that the collecting hood has high strength and certain toughness, thereby ensuring the comprehensive strength of the gas insulated transmission structure.

[0033] In this embodiment, the width of the collecting groove 12 gradually increases from one end close to the lumen 11 to one end close to the collecting groove 12. Specifically, the opening of the collecting groove 12 at one end facing the lumen 11 is the inlet, and the opening of the collecting groove 12 at one end facing the collecting cavity 21 is the outlet. The cross-sectional profile of the collecting groove 12 is an isosceles trapezoidal structure, the opening is the shorter top side of the isosceles trapezoidal structure, and the outlet is the longer bottom side of the isosceles trapezoidal structure. The isosceles trapezoidal structure is easy to process, which improves the production efficiency of the gas-insulated power transmission structure of this embodiment and reduces the processing cost of the gas-insulated power transmission structure of this embodiment. In other embodiments of the present invention, the cross-sectional shape of the two side walls of the collecting groove 12 can be arc-shaped. The positively charged particles entering the collecting tank 12 from the entrance move toward one side of the collecting tank 12 and into the collecting chamber 21 under the action of the magnetic field. The negatively charged particles entering the collecting tank 12 from the entrance move toward the other side of the collecting tank 12 and into the collecting chamber 21 under the action of the magnetic field. The structure of the collecting tank 12 with a narrow entrance and a wide exit can prevent the positively charged particles and the negatively charged particles from colliding with the wall of the collecting tank 12 when deflecting to one side of the collecting tank 12, thereby allowing the charged particles to smoothly enter the collecting chamber 21 and preventing the charged particles from rebounding into the lumen 11 after colliding with the wall of the collecting tank 12, thereby further improving the capture efficiency of the collecting chamber 21 for the charged particles.

[0034] The magnetic force generating member 3 may be a permanent magnet with high magnetic field strength, such as a neodymium iron boron magnet. In this embodiment, the magnetic force generating member 3 includes an N-pole permanent magnet strip 31 and an S-pole permanent magnet strip 32 arranged in sequence parallel to the length direction of the collecting tank 12. In other embodiments of the present invention, the magnetic force generating member 3 may be configured as an electromagnet fixed on the protrusion 22. When an electromagnet is used, the protrusion 22 is made of a formable material with strong insulating properties, such as polytetrafluoroethylene or epoxy resin.

[0035] The insulators 4 in the power transmission pipeline 1 are mostly of a basin-type structure, and the collecting groove 12 is arranged between two adjacent insulators 4. The number of the collecting grooves 12 can be one or more.

[0036] In this embodiment, the collecting tank 12 is arranged parallel to the axial direction of the power transmission pipeline 1, and the N-pole permanent magnetic strip 31 and the S-pole permanent magnetic strip 32 are both rectangular parallelepipeds.

[0037] Embodiment 2

[0038] In this embodiment, Figures 7 to 10As shown, the difference from the first embodiment is that the collecting slot 12 in this embodiment is arranged perpendicular to the axial direction of the power transmission pipeline 1, the collecting slot 12 is a semi-annular slot with the axis of the power transmission pipeline 1 as the center line, the N-pole permanent magnet strip 31 and the S-pole permanent magnet strip 32 are both semi-annular bodies, and when the magnetic force generating element 3 adopts an electromagnet, the protrusion 22 includes two protrusions arranged at intervals along the length direction of the collecting slot 12 and an arc beam arranged on the two protrusions, the arc beam and the two protrusions constitute a door-type frame structure, and the coil is wound on the outside of the arc beam. One or more collecting slots 12 can be set in the interval between the two insulators 4.

[0039] In summary, the gas-insulated power transmission mechanism of the present invention comprises a power transmission pipeline 1, the power transmission pipeline 1 has a tube cavity 11 for installing an insulator 4, a collecting cover 2 is connected to the outer side of the tube wall of the power transmission pipeline 1, the collecting cover 2 has a collecting cavity 21, the tube wall of the power transmission pipeline 1 is provided with a collecting groove 12 connecting the collecting cavity 21 and the tube cavity 11, and the collecting groove 12 is arranged at intervals from the insulator 4; the gas-insulated power transmission mechanism also comprises a magnetic force generating member 3, the magnetic force generating member 3 is used to apply a magnetic field to the tube cavity 11, and the charged particles in the tube cavity 11 are charged under the action of the magnetic field. The charged particles pass through the collecting groove 12 and enter the collecting chamber 21, thereby capturing the charged particles in the power transmission pipeline 1 and preventing the charged particles from accumulating on the insulator 4. In the process of capturing the charged particles, the magnetic field guides the charged particles to deflect toward the collecting chamber 21. After the particles enter the collecting chamber 21, some of them are captured by the porous inner wall of the collecting chamber 21, and the other part of the charged particles that are not captured will move deeper into the collecting chamber 21 under the action of the magnetic field until they hit the inner wall of the collecting chamber 21 again and are captured by the porous structure.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A gas insulated power transmission mechanism, characterized in that: The invention comprises a power transmission pipeline (1), the power transmission pipeline (1) having a tube cavity (11) for installing an insulator (4), a collecting cover (2) connected to the outer side of the tube wall of the power transmission pipeline (1), the collecting cover (2) having a collecting cavity (21), a collecting groove (12) connecting the collecting cavity (21) and the tube cavity (11) being provided on the tube wall of the power transmission pipeline (1), and the collecting groove (12) and the insulator (4) being arranged at intervals; The gas-insulated power transmission mechanism further comprises a magnetic force generating element (3), wherein the magnetic force generating element (3) is used to apply a magnetic field to the tube cavity (11), so that the charged particles in the tube cavity (11) pass through the collection slot (12) and enter the collection chamber (21) under the action of the magnetic field.

2. The gas-insulated power transmission mechanism according to claim 1, characterized in that: The inner wall of the collecting chamber (21) has a porous structure.

3. The gas-insulated power transmission mechanism according to claim 2, characterized in that: The collecting hood (2) comprises a porous ceramic layer and a metal reinforcement layer which are arranged in sequence from the inside to the outside.

4. The gas-insulated power transmission mechanism according to claim 1, characterized in that: The width of the collecting groove (12) gradually increases from one end close to the lumen (11) to one end close to the collecting groove (12).

5. The gas-insulated power transmission mechanism according to claim 4, characterized in that: The cross-sectional profile of the collecting tank (12) is an isosceles trapezoidal structure.

6. The gas-insulated power transmission mechanism according to claim 1, characterized in that: The collecting chamber (21) is a tunnel-shaped chamber parallel to the length direction of the collecting slot (12); a protrusion (22) is fixed to the portion of the chamber wall of the collecting chamber (21) facing the collecting slot (12); and the magnetic force generating element (3) is connected to the protrusion (22).

7. The gas-insulated power transmission mechanism according to claim 6, characterized in that: The magnetic force generating element (3) comprises an N-pole permanent magnetic strip (31) and an S-pole permanent magnetic strip (32) which are sequentially arranged parallel to the length direction of the collecting slot (12).

8. The gas-insulated power transmission mechanism according to claim 6, characterized in that: The magnetic force generating member (3) is an electromagnet fixed on two protruding parts.

9. The gas-insulated power transmission mechanism according to claim 1, characterized in that: The collecting trough (12) is arranged parallel to the axial direction of the power transmission pipeline (1).

10. The gas-insulated power transmission mechanism according to claim 1, characterized in that: The collecting groove (12) is a semi-annular groove with the axis of the power transmission pipeline (1) as its center line.

Images