WO2021052001A1 - Exhaust system for deep well-type direct current grounding electrode - Google Patents

Exhaust system for deep well-type direct current grounding electrode Download PDF

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WO2021052001A1
WO2021052001A1 PCT/CN2020/103934 CN2020103934W WO2021052001A1 WO 2021052001 A1 WO2021052001 A1 WO 2021052001A1 CN 2020103934 W CN2020103934 W CN 2020103934W WO 2021052001 A1 WO2021052001 A1 WO 2021052001A1
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deep well
exhaust
grounding electrode
exhaust pipe
exhaust system
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PCT/CN2020/103934
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French (fr)
Chinese (zh)
Inventor
胡上茂
张义
屈路
刘刚
廖民传
贾磊
蔡汉生
李立浧
饶宏
胡泰山
冯瑞发
刘浩
梅琪
祁汭晗
施健
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南方电网科学研究院有限责任公司
中国南方电网有限责任公司
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Publication of WO2021052001A1 publication Critical patent/WO2021052001A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor

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  • the present invention relates to the technical field of direct current transmission, in particular to a deep well type direct current ground electrode exhaust system.
  • the particle size and ratio of coke particles are key technologies in the filling process of deep-well DC grounding electrode engineering.
  • Coke as the main filling material for the gap between the downhole feed rod and the wall of the deep well, is an important part of the grounding electrode.
  • the feed conductor has ion conduction during the dispersion process.
  • the interaction system of coke and water will be accompanied by the production of gas. If the gas cannot be smoothly discharged from the downhole feed system, the gas will be The form of bubbles is attached to the feed system; as the amount of gas continues to increase, the grounding resistance will increase correspondingly, which will eventually lead to the failure of the grounding electrode.
  • the embodiment of the present invention provides a deep well type DC grounding electrode exhaust system, which can effectively fill the diffuse flow section of the deep well, while effectively exhausting the exhaust gas, and improving the service life of the exhaust system.
  • the first embodiment of the present invention provides a deep well type DC ground electrode exhaust system, the filling system is located in the deep well; the filling system includes: exhaust pipe, coke particles and geotextile;
  • the exhaust pipe is fixed on the outer side of the deep well type DC grounding electrode extending downhole; the length of the exhaust pipe is greater than the total depth of the deep well; the exhaust pipe is distributed with exhaust holes on the wall of the exhaust pipe;
  • the geotextile is wrapped around the outside of the exhaust hole.
  • the total depth of the well body of the deep well is not less than 1000m, and the well diameter is not less than 340mm.
  • the exhaust port of the exhaust pipe extends beyond the wellhead of the deep well, and the extension distance is not less than 0.5m;
  • the particle size of the coke particles is 0.125mm-0.180mm.
  • the specification of the geotextile is 200g/m2.
  • a deep-well type DC ground electrode exhaust system provided by the embodiment of the present invention has the following beneficial effects:
  • Filling between the wall of the deep well and the deep well type DC grounding electrode with coke particles can increase the contact area between the feed rod and the formation, accelerate the flow efficiency, and reduce the corrosion rate of the feed rod;
  • the particle size range of the coke particles is 80-120 Mesh (particle size 0.125mm-0.180mm), which can effectively ensure the contact area of the feed rod and the stratum, and ensure the efficiency of diffusion;
  • the geotextile is wrapped on the outside of the exhaust hole, which can effectively exhaust gas while preventing fine coke particles
  • the amount of 0.1-0.2mm coke particles entering the exhaust pipe through the geotextile is less than 10g/h, which has a good filtering effect and can ensure the exhaust system Effective exhaust; so as to effectively exhaust at the same time, prevent the exhaust blockage caused by the bottom coke particles, and further improve the service life of the exhaust system.
  • FIG. 1 is a schematic structural diagram of a deep well type DC grounding electrode exhaust system provided by Embodiment 1 of the present invention.
  • FIG. 1 it is a schematic structural diagram of a deep well type DC grounding electrode exhaust system provided by an embodiment of the present invention.
  • the filling system is located in the deep well; the filling system includes: exhaust pipe 1, coke particles 2 and geotextile 3;
  • the exhaust pipe 1 is fixed on the outside of the deep well type DC grounding electrode 4 extending down the well; the length of the exhaust pipe 1 is greater than the total depth of the deep well; the exhaust pipe 1 has exhaust holes distributed on the pipe wall;
  • Coke particles 2 are filled between the wall of the deep well and the deep well type DC ground electrode 4;
  • the geotextile 3 is wrapped around the outside of the exhaust hole.
  • the total depth of the well body of the deep well is not less than 1000m, and the well diameter is not less than 340mm.
  • the exhaust port of the exhaust pipe 1 extends beyond the wellhead of the deep well, and the extension distance is not less than 0.5m;
  • the particle size of the coke particles 2 ranges from 0.125 mm to 0.180 mm. That is, the particle size of the coke particles 2 is less than or equal to 0.180 mm and greater than or equal to 0.125 mm.
  • the specification of the geotextile 3 is 200 g/m 2 .
  • a deep-well type DC ground electrode exhaust system provided by the embodiment of the present invention has the following beneficial effects:
  • Filling between the wall of the deep well and the deep well type DC grounding electrode with coke particles can increase the contact area between the feed rod and the formation, accelerate the flow efficiency, and reduce the corrosion rate of the feed rod;
  • the particle size range of the coke particles is 80-120 Mesh (particle size 0.125mm-0.180mm), which can effectively ensure the contact area of the feed rod and the stratum, and ensure the efficiency of diffusion;
  • the geotextile is wrapped on the outside of the exhaust hole, which can effectively exhaust gas while preventing fine coke particles
  • the exhaust device when 200g/m2 geotextile is used, the amount of 0.1-0.2mm coke particles entering the exhaust pipe through the geotextile is less than 10g/h, which has a good filtering effect and can ensure the exhaust system Effective exhaust; thus, while effectively exhausting, it prevents exhaust blockage caused by coke particles at the bottom, and further improves the service life of the exhaust system.
  • the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separate. Units can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the connection relationship between the modules indicates that they have a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative work.

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Abstract

An exhaust system for a deep well-type direct current grounding electrode. A filling system is located in a deep well, and comprises: an exhaust pipe (1), coke particles (2) and a geotextile (3). The exhaust pipe (1) is fixed to the outer side of a deep well-type direct current grounding electrode (4) that extends underground, and the length of the exhaust pipe (1) is greater than the total depth of the deep well. Exhaust holes are distributed on the pipe wall of the exhaust pipe (1). The coke particles (2) are filled between the well wall of the deep well and the deep well-type direct current grounding electrode (4). The geotextile (3) is wrapped on the outer side of the exhaust holes. According to a method for constructing the exhaust system of the deep well-type direct current grounding electrode, loose flow sections of the deep well can be effectively filled, and the service life of the exhaust system is improved while efficiently exhausting gas.

Description

一种深井型直流接地极的排气系统Exhaust system of deep well type DC grounding electrode 技术领域Technical field
本发明涉及直流输电技术领域，尤其涉及一种深井型直流接地极的排气系统。The present invention relates to the technical field of direct current transmission, in particular to a deep well type direct current ground electrode exhaust system.
背景技术Background technique
焦炭颗粒粒径及配比是深井型直流接地极工程填充过程中的关键技术。焦炭作为井下馈电棒与所述深井的井壁之间空隙的主要填充料，是接地极的重要组成部分。在实际工作中，馈电导体在散流过程存在离子导电情况，在离子导电过程中，焦炭与水的作用系统会伴随着气体的产生，若气体不能通畅地排出井下馈电系统，气体将以气泡的形式附着于馈电系统中；随着气体量的不断增加，接地电阻会相应增加，最终导致接地极失效。The particle size and ratio of coke particles are key technologies in the filling process of deep-well DC grounding electrode engineering. Coke, as the main filling material for the gap between the downhole feed rod and the wall of the deep well, is an important part of the grounding electrode. In actual work, the feed conductor has ion conduction during the dispersion process. In the process of ion conduction, the interaction system of coke and water will be accompanied by the production of gas. If the gas cannot be smoothly discharged from the downhole feed system, the gas will be The form of bubbles is attached to the feed system; as the amount of gas continues to increase, the grounding resistance will increase correspondingly, which will eventually lead to the failure of the grounding electrode.
因此需要一种深井型直流接地极的排气系统，提高排气系统的使用寿命。Therefore, a deep well type DC grounding electrode exhaust system is needed to improve the service life of the exhaust system.
发明内容Summary of the invention
本发明实施例提供一种深井型直流接地极的排气系统，能够有效地填充深井散流段，在有效排气的同时，提高排气系统的使用寿命。The embodiment of the present invention provides a deep well type DC grounding electrode exhaust system, which can effectively fill the diffuse flow section of the deep well, while effectively exhausting the exhaust gas, and improving the service life of the exhaust system.
本发明实施例一提供了一种深井型直流接地极的排气系统，所述填充系统位于深井中；所述填充系统包括：排气管、焦炭颗粒和土工布；The first embodiment of the present invention provides a deep well type DC ground electrode exhaust system, the filling system is located in the deep well; the filling system includes: exhaust pipe, coke particles and geotextile;
所述排气管固定于延伸至井下的深井型直流接地极外侧；所述排气管的长度大于所述深井的总深度；所述排气管的管壁分布排气孔；The exhaust pipe is fixed on the outer side of the deep well type DC grounding electrode extending downhole; the length of the exhaust pipe is greater than the total depth of the deep well; the exhaust pipe is distributed with exhaust holes on the wall of the exhaust pipe;
所述焦炭颗粒填充于所述深井的井壁和深井型直流接地极之间；The coke particles are filled between the wall of the deep well and the deep well type DC ground electrode;
所述土工布包覆于所述排气孔的外侧。The geotextile is wrapped around the outside of the exhaust hole.
作为上述方案的改进，所述深井的井体的总深度不小于1000m，井径不小于 340mm。As an improvement of the above scheme, the total depth of the well body of the deep well is not less than 1000m, and the well diameter is not less than 340mm.
作为上述方案的改进，所述排气管的排气口伸出所述深井的井口，且伸出距离不小于0.5m；As an improvement of the above solution, the exhaust port of the exhaust pipe extends beyond the wellhead of the deep well, and the extension distance is not less than 0.5m;
作为上述方案的改进，所述焦炭颗粒的粒径为0.125mm-0.180mm。As an improvement of the above solution, the particle size of the coke particles is 0.125mm-0.180mm.
作为上述方案的改进，所述土工布的规格为200g/m2。As an improvement of the above solution, the specification of the geotextile is 200g/m2.
本发明实施例提供的一种深井型直流接地极的排气系统，与现有技术相比，具有如下有益效果：Compared with the prior art, a deep-well type DC ground electrode exhaust system provided by the embodiment of the present invention has the following beneficial effects:
通过焦炭颗粒对深井的井壁和深井型直流接地极之间进行填充，能够增大馈电棒与地层接触面积，加快散流效率，降低馈电棒腐蚀速率；焦炭颗粒的粒径范围为80-120目(粒径为0.125mm-0.180mm)，能够有效保证馈电棒与地层接触面积，保证散流效率；通过土工布包覆于排气孔的外侧，在有效排气的同时能够防止细小焦炭颗粒透过排气装置，当采用200g/m2的土工布时，0.1-0.2mm的焦炭颗粒透过土工布进入排气管的数量小于10g/h，具有很好的过滤效果，可保证排气系统有效排气；从而在有效排气的同时，防止底部焦炭颗粒的造成的排气堵塞，进一步提高排气系统的使用寿命。Filling between the wall of the deep well and the deep well type DC grounding electrode with coke particles can increase the contact area between the feed rod and the formation, accelerate the flow efficiency, and reduce the corrosion rate of the feed rod; the particle size range of the coke particles is 80-120 Mesh (particle size 0.125mm-0.180mm), which can effectively ensure the contact area of the feed rod and the stratum, and ensure the efficiency of diffusion; the geotextile is wrapped on the outside of the exhaust hole, which can effectively exhaust gas while preventing fine coke particles Through the exhaust device, when 200g/m2 geotextile is used, the amount of 0.1-0.2mm coke particles entering the exhaust pipe through the geotextile is less than 10g/h, which has a good filtering effect and can ensure the exhaust system Effective exhaust; so as to effectively exhaust at the same time, prevent the exhaust blockage caused by the bottom coke particles, and further improve the service life of the exhaust system.
附图说明Description of the drawings
图1是本发明实施例一提供的一种深井型直流接地极的排气系统的结构示意图。FIG. 1 is a schematic structural diagram of a deep well type DC grounding electrode exhaust system provided by Embodiment 1 of the present invention.
具体实施方式detailed description
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
参见图1，是本发明实施例提供的一种深井型直流接地极的排气系统的结构示意图，填充系统位于深井中；填充系统包括：排气管1、焦炭颗粒2和土工布3；Referring to Figure 1, it is a schematic structural diagram of a deep well type DC grounding electrode exhaust system provided by an embodiment of the present invention. The filling system is located in the deep well; the filling system includes: exhaust pipe 1, coke particles 2 and geotextile 3;
排气管1固定于延伸至井下的深井型直流接地极4外侧；排气管1的长度大于深井的总深度；排气管1的管壁分布排气孔；The exhaust pipe 1 is fixed on the outside of the deep well type DC grounding electrode 4 extending down the well; the length of the exhaust pipe 1 is greater than the total depth of the deep well; the exhaust pipe 1 has exhaust holes distributed on the pipe wall;
焦炭颗粒2填充于深井的井壁和深井型直流接地极4之间； Coke particles 2 are filled between the wall of the deep well and the deep well type DC ground electrode 4;
土工布3包覆于排气孔的外侧。The geotextile 3 is wrapped around the outside of the exhaust hole.
进一步的，深井的井体的总深度不小于1000m，井径不小于340mm。Further, the total depth of the well body of the deep well is not less than 1000m, and the well diameter is not less than 340mm.
进一步的，排气管1的排气口伸出深井的井口，且伸出距离不小于0.5m；Further, the exhaust port of the exhaust pipe 1 extends beyond the wellhead of the deep well, and the extension distance is not less than 0.5m;
进一步的，焦炭颗粒2的粒径范围为0.125mm-0.180mm。即焦炭颗粒2的粒径小于等于0.180mm，大于等于0.125mm。Further, the particle size of the coke particles 2 ranges from 0.125 mm to 0.180 mm. That is, the particle size of the coke particles 2 is less than or equal to 0.180 mm and greater than or equal to 0.125 mm.
进一步的，土工布3的规格为200g/m 2。 Further, the specification of the geotextile 3 is 200 g/m 2 .
本发明实施例提供的一种深井型直流接地极的排气系统，与现有技术相比，具有如下有益效果：Compared with the prior art, a deep-well type DC ground electrode exhaust system provided by the embodiment of the present invention has the following beneficial effects:
通过焦炭颗粒对深井的井壁和深井型直流接地极之间进行填充，能够增大馈电棒与地层接触面积，加快散流效率，降低馈电棒腐蚀速率；焦炭颗粒的粒径范围为80-120目(粒径为0.125mm-0.180mm)，能够有效保证馈电棒与地层接触面积，保证散流效率；通过土工布包覆于排气孔的外侧，在有效排气的同时能够防止细小焦炭颗粒透过排气装置，当采用200g/m2的土工布时，0.1-0.2mm的焦炭颗粒透过土工布进入排气管的数量小于10g/h，具有很好的过滤效果，可保证排气系统有效排气；从而在有效排气的同时，防止底部焦炭颗粒的造成的排气堵塞，进一步提高排气系统的使用寿命。Filling between the wall of the deep well and the deep well type DC grounding electrode with coke particles can increase the contact area between the feed rod and the formation, accelerate the flow efficiency, and reduce the corrosion rate of the feed rod; the particle size range of the coke particles is 80-120 Mesh (particle size 0.125mm-0.180mm), which can effectively ensure the contact area of the feed rod and the stratum, and ensure the efficiency of diffusion; the geotextile is wrapped on the outside of the exhaust hole, which can effectively exhaust gas while preventing fine coke particles Through the exhaust device, when 200g/m2 geotextile is used, the amount of 0.1-0.2mm coke particles entering the exhaust pipe through the geotextile is less than 10g/h, which has a good filtering effect and can ensure the exhaust system Effective exhaust; thus, while effectively exhausting, it prevents exhaust blockage caused by coke particles at the bottom, and further improves the service life of the exhaust system.
需说明的是，以上所描述的装置实施例仅仅是示意性的，其中所述作为分离 部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。另外，本发明提供的装置实施例附图中，模块之间的连接关系表示它们之间具有通信连接，具体可以实现为一条或多条通信总线或信号线。本领域普通技术人员在不付出创造性劳动的情况下，即可以理解并实施。It should be noted that the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physically separate. Units can be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments. In addition, in the drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that they have a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art can understand and implement it without creative work.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。The above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered This is the protection scope of the present invention.

Claims (5)

  1. 一种深井型直流接地极的排气系统，其特征在于，所述填充系统位于深井中；所述填充系统包括：排气管、焦炭颗粒和土工布；A deep-well type DC grounding electrode exhaust system, characterized in that the filling system is located in the deep well; the filling system includes: an exhaust pipe, coke particles and geotextile;
    所述排气管固定于延伸至井下的深井型直流接地极外侧；所述排气管的长度大于所述深井的总深度；所述排气管的管壁分布排气孔；The exhaust pipe is fixed on the outer side of the deep well type DC grounding electrode extending downhole; the length of the exhaust pipe is greater than the total depth of the deep well; the exhaust pipe is distributed with exhaust holes on the wall of the exhaust pipe;
    所述焦炭颗粒填充于所述深井的井壁和深井型直流接地极之间；The coke particles are filled between the wall of the deep well and the deep well type DC ground electrode;
    所述土工布包覆于所述排气孔的外侧。The geotextile is wrapped around the outside of the exhaust hole.
  2. 如权利要求1所述的一种深井型直流接地极的排气系统，其特征在于，所述深井的井体的总深度不小于1000m，井径不小于340mm。The exhaust system of a deep well type DC grounding electrode according to claim 1, wherein the total depth of the well body of the deep well is not less than 1000m, and the well diameter is not less than 340mm.
  3. 如权利要求2所述的一种深井型直流接地极的排气系统，其特征在于，所述排气管的排气口伸出所述深井的井口，且伸出距离不小于0.5m；The exhaust system of a deep well type DC grounding electrode according to claim 2, wherein the exhaust port of the exhaust pipe extends out of the wellhead of the deep well, and the extending distance is not less than 0.5m;
  4. 如权利要求3所述的一种深井型直流接地极的排气系统，其特征在于，所述焦炭颗粒的粒径为0.125mm-0.180mm。The exhaust system of a deep well type DC grounding electrode according to claim 3, wherein the particle size of the coke particles is 0.125mm-0.180mm.
  5. 如权利要求4所述的一种深井型直流接地极的排气系统，其特征在于，所述土工布的规格为200g/m 2。 The exhaust system of a deep well type DC grounding electrode according to claim 4, wherein the specification of the geotextile is 200 g/m 2 .
PCT/CN2020/103934 2019-09-20 2020-07-24 Exhaust system for deep well-type direct current grounding electrode WO2021052001A1 (en)

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