阅读说明：本技术 一种多腔室模块化自组装结构及加工方法 (Multi-cavity modular self-assembly structure and machining method ) 是由 浦仕遵 李宏梅 彭庆军 刘平林 陈永梅 范庆前 于 2021-06-22 设计创作，主要内容包括：本发明公开了一种多腔室模块化自组装结构及加工方法,该多腔室模块化自组装结构包括接地模块、高压端模块和若干中间模块；若干中间模块位于接地模块和高压端模块之间,若干中间模块之间,以及中间模块与接地模块和高压端模块之间均通过榫接方式可拆卸连接；该多腔室模块化自组装结构通过接地模块与空气间隙相接触,通过高压模块与下导弧臂相连接。该发明由于采用了自由组装式的模块化结构,能够任意组合灭弧腔室的数量,得到用于中低压电压等级线路的结构。相比于已有的一体化多腔室灭弧结构,该多腔室模块化自组装结构在加工过程中出错率低,且能够保证结构强度依然稳固,可以快速熄灭冲击电弧。(The invention discloses a multi-chamber modular self-assembly structure and a processing method, wherein the multi-chamber modular self-assembly structure comprises a grounding module, a high-voltage end module and a plurality of middle modules; the plurality of intermediate modules are positioned between the grounding module and the high-voltage end module, between the plurality of intermediate modules, and between the intermediate modules and the grounding module and between the intermediate modules and the high-voltage end module are detachably connected in a joggle mode; the multi-chamber modular self-assembly structure is in contact with the air gap through the grounding module and is connected with the lower arc guide arm through the high-voltage module. The invention adopts a freely assembled modular structure, so that the number of arc extinguishing chambers can be combined at will to obtain a structure for medium and low voltage grade lines. Compare in existing integration multi-chamber arc extinguishing structure, this multi-chamber modularization self-assembly structure error rate is low in the course of working, and can guarantee that structural strength is still firm, can extinguish the impact arc fast.)

1. A multi-chamber modular self-assembled structure, characterized by: the multi-chamber modular self-assembly structure comprises a grounding module, a high-voltage end module and a plurality of middle modules; the grounding module and the high-voltage end module are respectively positioned at the top and the bottom of the multi-chamber modular self-assembly structure, the plurality of intermediate modules are positioned between the grounding module and the high-voltage end module, between the plurality of intermediate modules, and between the intermediate modules and the grounding module and between the intermediate modules and the high-voltage end module are detachably connected in a joggle mode; this multicavity room modularization self-assembly structure is connected with the air gap through ground module, is connected with lower arc arm of leading through high-pressure module.

2. A multi-chamber modular self-assembled structure according to claim 1, wherein: the grounding module is integrally of a cylindrical structure, and a protruding tenon joint is arranged at the center of the bottom of the grounding module; the grounding module is internally provided with a layer of arc extinguishing basic unit and an arc introducing electrode, and the arc introducing electrode is vertically positioned above the arc extinguishing basic unit and is in contact with the arc extinguishing basic unit.

3. A multi-chamber modular self-assembled structure according to claim 1, wherein: the whole high-voltage module is of a cylindrical structure, and a joint slot is formed in the center of the top of the high-voltage module; the high-voltage module is internally provided with a layer of arc extinguishing basic unit and an arc leading-out electrode, and the arc leading-out electrode is vertically positioned below the arc extinguishing basic unit and is in contact with the arc extinguishing basic unit.

4. A multi-chamber modular self-assembled structure according to claim 1, wherein: each middle module is of a cylindrical structure, a protruding tenon joint is arranged at the center of the bottom of each middle module, and a joint slot is arranged at the center of the top of each middle module; the middle module is internally provided with a plurality of layers of arc extinguishing basic units which are longitudinally arranged at equal intervals.

5. A multi-chamber modular self-assembling structure according to any of claims 2-4, wherein: the arc extinguishing basic unit is composed of a plurality of surrounding spherical electrodes, and an arc extinguishing chamber with a three-stage necking structure extending outwards is formed between every two adjacent spherical electrodes.

6. A multi-chamber modular self-assembling structure according to any of claims 2 or 4, wherein: the section of the protruding tenon joint is circular, regular triangle, square or trapezoid.

7. A method of manufacturing a multi-chamber modular self-assembled structure according to any of claims 1-4, wherein: the processing method is based on processing and manufacturing by using a 3D printer and specifically comprises the following steps:

step 1, establishing an integral geometric model of the multi-chamber modular self-assembly structure in modeling software, dividing the integral geometric model into a high-voltage module geometric model, a grounding module geometric model and a middle module geometric model, setting a joint slot dent on the upper end surface of the high-voltage module geometric model, stretching a protruding tenon joint on the lower end surface of the grounding module geometric model, pulling the protruding tenon joint on the lower end surface of the middle module geometric model, and setting a joint slot dent on the upper end surface;

step 2, respectively importing the established geometric models of the high-voltage module, the grounding module and the middle module into a 3D printer, and inverting the geometric models of the grounding module and the middle module when importing the geometric models of the grounding module and the middle module so that the upper end with larger area faces downwards and the lower end with a protruding tenon joint faces upwards;

step 3, after the grounding module and the middle module are printed, micro-polishing the surface of the protruding tenon joint by using abrasive paper, and making a tenon joint direction mark to ensure that the electric arc transmission path has connectivity after the modules are in tenon joint;

and 4, joggling the high-voltage module, the grounding module and the middle module, filling epoxy resin glue at the joggling positions among the modules, putting the modules in an air drying box, and drying the epoxy resin glue.

Technical Field

The invention relates to the technical field of electric power, in particular to a multi-cavity modular self-assembly structure and a processing method.

Background

Along with the development of social economy, people have more and more large demand on electricity, and the requirements on technical and economic indexes of power grid operation of various voltage levels are increasingly improved. Accidents such as tripping, insulator flashover and the like caused by lightning strike on the line seriously threaten the safe operation of the power transmission and distribution line. The multi-chamber arc extinguishing structure is applied to lightning protection due to excellent arc extinguishing performance.

In recent years, scholars at home and abroad have developed a novel lightning protection device based on a multi-chamber structure. However, such devices are often integrated and are consumable: the structure suitable for lines with various voltage levels cannot be obtained by joggling different numbers of intermediate modules, and the field installation is heavy; since the impact arc is interrupted many times, the surface of the metal electrode is strongly burned, and the device cannot be used for a long time, so that the device in the current stage needs to be replaced at intervals, and a large amount of funds are needed. In addition, due to the integration of the whole device, the structural strength of the device becomes fragile and easy to break under a very high length, and the device cannot bear a large external force; and the processing is inconvenient, and the interruption rate and the error rate are high in the processing process.

Disclosure of Invention

In order to overcome the defects, the invention provides a multi-chamber modular self-assembly structure and a processing method thereof.

The technical scheme adopted by the invention is as follows:

a multi-chamber modular self-assembly structure comprises a grounding module, a high-voltage end module and a plurality of middle modules; the grounding module and the high-voltage end module are respectively positioned at the top and the bottom of the multi-chamber modular self-assembly structure, the plurality of intermediate modules are positioned between the grounding module and the high-voltage end module, between the plurality of intermediate modules, and between the intermediate modules and the grounding module and between the intermediate modules and the high-voltage end module are detachably connected in a joggle mode; the multi-chamber modular self-assembly structure is in contact with the air gap through the grounding module and is connected with the lower arc guide arm.

Furthermore, the grounding module is integrally of a cylindrical structure, and a protruding tenon joint is arranged at the center of the bottom of the grounding module; the grounding module is internally provided with a layer of arc extinguishing basic unit and an arc introducing electrode, and the arc introducing electrode is vertically positioned above the arc extinguishing basic unit and is in contact with the arc extinguishing basic unit.

Furthermore, the whole high-voltage module is of a cylindrical structure, and a joint slot is formed in the center of the top of the high-voltage module; the high-voltage module is internally provided with a layer of arc extinguishing basic unit and an arc leading-out electrode, and the arc leading-out electrode is vertically positioned below the arc extinguishing basic unit and is contacted with the arc extinguishing basic unit.

Furthermore, each middle module is of a cylindrical structure, a protruding tenon joint is arranged at the center of the bottom of each middle module, and a joint slot is arranged at the center of the top of each middle module; the middle module is internally provided with a plurality of layers of arc extinguishing basic units which are longitudinally arranged at equal intervals.

Furthermore, the arc extinguishing basic unit is composed of a plurality of spherical electrodes arranged in a surrounding mode, and an arc extinguishing chamber with a three-stage necking structure extending outwards is formed between every two adjacent spherical electrodes.

Further, the section of the protruding tenon joint is circular, regular triangle, square or trapezoid.

The method for processing the multi-cavity modular self-assembly structure is based on processing and manufacturing by using a 3D printer and specifically comprises the following steps of:

step 1, establishing an integral geometric model of the multi-chamber modular self-assembly structure in modeling software, dividing the integral geometric model into a high-voltage module geometric model, a grounding module geometric model and a middle module geometric model, setting a joint slot dent on the upper end surface of the high-voltage module geometric model, stretching a protruding tenon joint on the lower end surface of the grounding module geometric model, pulling the protruding tenon joint on the lower end surface of the middle module geometric model, and setting a joint slot dent on the upper end surface;

step 2, respectively importing the established geometric models of the high-voltage module, the grounding module and the middle module into a 3D printer, and inverting the geometric models of the grounding module and the middle module when importing the geometric models of the grounding module and the middle module so that the upper end with larger area faces downwards and the lower end with a protruding tenon joint faces upwards;

step 3, after the grounding module and the middle module are printed, micro-polishing the surface of the protruding tenon joint by using abrasive paper, and making a tenon joint direction mark to ensure that the electric arc transmission path has connectivity after the modules are in tenon joint;

and 4, joggling the high-voltage module, the grounding module and the middle module, filling epoxy resin glue at the joggling positions among the modules, putting the modules in an air drying box, and drying the epoxy resin glue.

The invention has the beneficial effects that:

the multi-cavity modular self-assembly structure can select the middle modules with different numbers and structures according to lines with different voltage grades, and is joggled with the high-voltage module and the grounding module to splice a complete arc extinguishing device. Compare in traditional structure, this multi-chamber modularization self-assembly structure can extinguish the impact arc fast guaranteeing, reduces under the condition of circuit trip rate, and the joggle mode can effectively promote overall structure's steadiness. In addition, the multi-cavity modular self-assembly structure can be processed in a modular mode, the processing mode is simplified, compared with the conventional integrated processing mode, the error rate is increased to the acceptable degree of batch processing, and the processing time is greatly reduced.

In practical application, when this multicavity room modularization self-assembly structure use number of times reaches a certain quantity, when needing to be changed, because be the joggle structure, convenient to detach, the staff can be changed with regard to several middle modules that the spherical electrode ablation is serious wherein, and need not change whole device, has fully saved work load, manpower and materials to and maintenance cost.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the present invention after detachment;

FIG. 3 is a schematic diagram of an arc extinguishing basic unit according to the present invention;

FIG. 4 is a schematic end view of a protruding dovetail joint of the present invention;

FIG. 5 is a graph of a quenching arc experiment;

in fig. 1-3, 1-grounding module, 2-high-voltage end module, 3-middle module, 4-protruding tenon joint, 5-arc extinguishing basic unit, 6-arc leading-in electrode, 7-joint slot, 8-arc leading-out electrode, 9-spherical electrode, and 10-arc extinguishing chamber.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1-2, the present invention provides a multi-chamber modular self-assembled structure including a ground module 1, a high voltage end module 2, and a number of intermediate modules 3. The grounding module 1 and the high-voltage end module 2 are respectively positioned at the top and the bottom of the multi-chamber modular self-assembly structure, the plurality of middle modules 3 are positioned between the grounding module 1 and the high-voltage end module 2, between the plurality of middle modules 3 and between the middle modules 3 and the grounding module 1 and the high-voltage end module 2, and the middle modules 3 and the grounding module 1 and the high-voltage end module 2 are detachably connected in a joggle mode. The multi-chamber modular self-assembly structure is in contact with the air gap through the grounding module 1 and is connected with the lower arc guide arm.

Take the line voltage class at 35kV and below as an example: the multi-chamber modular self-assembly structure selects a grounding module 1, a high-voltage end module 2 and three middle modules 3.

The grounding module 1, the high-voltage module and the middle module 3 are all of cylindrical structures, the height of the grounding module 1 is 2cm, the diameter of the grounding module is 6cm, the height of the high-voltage module is 2cm, the diameter of the high-voltage module is 6cm, the height of the middle module 3 is 12cm, and the diameter of the middle module is 6 cm. The bottom center of the grounding module 1 is provided with a protruding tenon joint 4, the grounding module 1 is internally provided with a layer of arc extinguishing basic unit 5 and an arc introducing electrode 6, and the arc introducing electrode 6 is vertically positioned above the arc extinguishing basic unit 5 and is contacted with the arc extinguishing basic unit 5. The top center of the high-voltage module is provided with a connector slot 7, the high-voltage module is internally provided with a layer of arc extinguishing basic unit 5 and an arc leading-out electrode 8, and the arc leading-out electrode 8 is vertically positioned below the arc extinguishing basic unit 5 and is in contact with the arc extinguishing basic unit 5. The center of the bottom of the middle module 3 is provided with a protruding tenon joint 4, and the center of the top is provided with a joint slot 7; the inside of the middle module 3 is provided with 4 layers of arc extinguishing basic units 5 which are arranged longitudinally at equal intervals.

For the arc-introducing electrode 6 and the arc-extracting electrode 8, the arc-introducing electrode 6 and the arc-extracting electrode 8 were each a cylindrical copper electrode having a diameter of 2mm and a height of 4 cm.

As shown in fig. 3, for the arc extinguishing basic unit 5 arranged inside the grounding module 1, the high voltage module and the middle module 3, it is specifically composed of 8 spherical electrodes 9 arranged around, and an arc extinguishing chamber 10 of a three-stage necking structure extending outward is formed between the adjacent spherical electrodes 9. Between the 8 spherical electrodes 9, there are 7 arc-extinguishing chambers 10, and the 8 th arc-extinguishing chamber 10 is arranged between the upper and lower basic units, and it functions to transmit the arc. The diameter of spherical electrode 9 is 4mm, and the electrode spacing is 2mm, and 3 grades of circular cone throat structures have been adopted to multi-chamber modularization self-assembly structure's experimental sample, and single circular cone throat structure bottom surface opening diameter is 4mm, goes up bottom surface opening diameter 1mm, and height 2 mm.

For the protruding dovetail joint 4 and the joint slot 7, the multi-chamber modular self-assembled structure gives the following various forms:

(1) the section of the protruding tenon joint 4 is circular, namely the protruding tenon joint 4 adopts a cylindrical structure; the height is 2cm and the cross-sectional radius is 1 cm.

(2) The section of the protruding tenon joint 4 is regular triangle, namely the protruding tenon joint 4 adopts a triangular prism structure; the height is 4cm, and the side length of a regular triangle of the cross section is 2 cm.

(3) The section of the protruding tenon joint 4 is rectangular, namely, the protruding tenon joint 4 adopts a regular quadrangular prism structure; the height is 6cm and the side length is 3 cm.

(4) The section of the protruding tenon joint 4 is isosceles trapezoid, namely the protruding tenon joint 4 adopts a quadrangular structure; the height of the prism is 10cm, the length of the upper bottom edge of the trapezoid is 4cm, the length of the lower bottom edge of the trapezoid is 6cm, and the height of the trapezoid is 3 cm.

The joint slot 7 is matched with the protruding tenon joint 4, so that no gap is left after the modules are connected. However, when the protruding tenon joint 4 is of a cylindrical structure, it is necessary to ensure that the spherical electrodes 9 of the arc extinguishing basic units 5 inside the grounding module 1, the high-voltage module and the middle module 3 are located on the same axis in the vertical direction after the modules are connected. As shown in fig. 4, there are several different height, shape joggle structures according to different voltage class lines. In a 10kV line, the tenon joint is in a cylinder shape, and in a 35kV line, the tenon joint is in a regular triangular prism shape; in a 110kV line, the tenon joint is in a cuboid shape; in a 220kV line, the tenon joint is in a quadrangular prism structure.

This multicavity modularization self-assembly structure's ground module 1, high-voltage terminal module 2 and middle module 3 add man-hour can be based on with 3D printer processing manufacturing, specifically carry out printer processing manufacturing according to following step:

step 1, in modeling software, firstly, an overall geometric model of the multi-chamber modular self-assembly structure is established. Then, the overall geometric model is split into a high-voltage module geometric model, a grounding module 1 geometric model and an intermediate module 3 geometric model, then, a joint slot 7 is arranged on the upper end face of the high-voltage module geometric model, a protruding tenon joint is stretched on the lower end face of the grounding module 1 geometric model, a protruding tenon joint 4 is pulled on the lower end face of the intermediate module 3 geometric model, and a joint slot 7 is arranged on the upper end face. The geometric model shapes and sizes of the modules and the tenon joints are different according to the circuits suitable for different voltage grades.

And 2, respectively importing the high-voltage module geometric model, the grounding module 1 geometric model and the middle module 3 geometric model into a 3D printer. It should be noted here that, when the 3D printer works, the printing model is from bottom to top, and the cross-sectional dimension of the protruding tenon joint 4 is much smaller than that of the module, so that the structure is very unstable during printing; the concrete expression is that the structure turns on one side and the product is scrapped when the printing is in the midway. Therefore, when the geometric models of the high-voltage module and the middle module 3 are introduced, the geometric models need to be inverted, the upper end with a large area faces downwards, and the lower end with the protruding tenon joint 4 faces upwards, so that the product is prevented from turning on one side during printing.

And 3, preparing for splicing when all the modules are printed. Due to the joggling method, the joggling joints are in interference fit, the splicing is possibly difficult, and after the grounding module 1 and the middle module 3 are printed, the surfaces of the protruding joggling joints 4 need to be micro-polished by abrasive paper. When the modules are joggled, the connectivity of the arc transmission path among the modules needs to be marked in advance, and the direction cannot be wrongly connected.

And 4, joggling the high-voltage module, the grounding module 1 and the middle module 3 to keep the structural integrity and the electrical insulation strength of the multi-cavity modular self-assembly structure, filling epoxy resin glue in the joggles among the modules, and putting the joggles in an air drying box to air-dry the epoxy resin glue.

According to the processing method, the ground module 1, the high-voltage module and the middle module 3 are subjected to joggling, a multi-cavity modular self-assembly structure with the overall size of 28cm can be formed, 160 arc extinguishing chambers 10 are arranged in the multi-cavity modular self-assembly structure, and the impact arc generated by the 35kV line due to lightning stroke can be reliably interrupted.

In order to further verify the arc extinguishing capability of the multi-chamber modular self-assembly structure, a quenching arc comparison test is carried out on the multi-chamber modular self-assembly structure and an integrally processed traditional structure with the same size and the same number of arc extinguishing chambers 10;

test equipment: a test platform is built by using equipment such as a surge current generator, a Rogowski coil, an ultra-high speed camera, a voltage divider, an oscilloscope and the like in a high-voltage test room. Before working, the impulse current generator charges the capacitor bank to the required voltage by the rectifying power supply, then sends a trigger pulse to break down the trigger ball gap, and the capacitor bank discharges through the resistor, the inductor and the tested object. The Rogowski coil is a non-contact current sensor, is realized based on an electromagnetic induction principle, and measures the magnitude of impact current in an experiment. The ultra-high speed camera has a small exposure time and can capture the motion condition of the impact arc in the experiment. The voltage divider adopts a capacitive voltage divider for measuring impulse voltage, and a grading ring is additionally arranged on the top of the voltage divider. The oscilloscope is used for recording the voltage and current waveforms at two ends of the tested object.

The test process comprises the following steps: a2 kA surge current of 8/20 μ s was applied to the test piece, and the kinetic characteristics and quenching characteristics of the arc at the shock quenching stage of the multi-chamber structure were observed. The multi-chamber modular self-assembled structure is graphically illustrated in fig. 5, along with a conventional structure of the same size and number of arc extinguishing chambers 10.

Test results were formed: because the multi-cavity modular self-assembly structure is only changed in structural splicing, the layout of the inner cavities is not changed, the physical characteristics of the multi-cavity modular self-assembly structure are the same as those of the traditional integrally processed structure with the same size and the same number of arc extinguishing cavities 10, and the arc extinguishing capability curve of the multi-cavity modular self-assembly structure is coincident with that of the traditional integrally processed structure with the same size and the same number of arc extinguishing cavities 10.

To sum up, this multi-chamber modularization self-assembly structure can select the middle module 3 of different numbers, structure to the circuit of different voltage grades, with high-voltage module and 1 looks joggles of ground connection module, splices out a complete arc control device. Compare in traditional structure, this multi-chamber modularization self-assembly structure can extinguish the impact arc fast guaranteeing, reduces under the condition of circuit trip rate, and the joggle mode can effectively promote overall structure's steadiness. In addition, the multi-cavity modular self-assembly structure can be processed in a modular mode, the processing mode is simplified, compared with the conventional integrated processing mode, the error rate is increased to the acceptable degree of batch processing, and the processing time is greatly reduced. In practical application, when this multicavity modularization self-assembly structure use number of times reaches a certain quantity, when needing to be changed, because be the joggle structure, convenient to detach, the staff can change with regard to several among them spherical electrode 9 serious middle module 3 of ablation, and need not change whole device, has fully saved work load, manpower and materials to and maintenance cost.