摘要
随着能源结构不断优化调整,天然气使用领域不断扩大,对燃气公司配套供气设施的快速建设和安全运行维护提出了更高要求。如何解决供气设施建设、抢维修过程中遇到的瓶颈,确保燃气设施得到安全、高效的建设和平稳的检、维修是燃气经营企业面临的迫切问题。为此,结合实际,从确保燃气管网安全、高效作业的角度出发,查找了燃气埋地阀门使用中存在的问题及设备缺陷,提出相应改进措施并通过实施应用证实了其适用性。研究结果表明:①导致燃气埋地阀门无法进行放散、置换、检测和锁定的主要原因是阀门功能设计不够完善以及阀门配套工具不匹配;②针对燃气管网及阀门存在的缺陷,采取设计放散短管及控制阀、设计制作筒套式配套锁具将阀门进行锁定等措施进行功能改进;③通过对燃气阀门功能进行改进和完善,不但能够放散燃气管道内天然气,而且能够从放散控制阀处对管道注入惰性气体进行置换和检测置换效果;④在对燃气管道进行风险作业时,采用筒套式锁具将阀门四方头操作部位进行隔离封锁,能够预防外来人员意外打开阀门,避免发生意外人身伤害事故。实施应用分析认为,采用该改进措施不仅减少了管道检、维修作业时的停气影响用户数量,缩短了停气用户的影响时间,还减少了检、维修作业时的人工成本和燃气放空损失,提高了燃气公司的经济、社会效益。
With the energy restructuring and upgrading and the constant expansion of gas-applied domain,some stricter requirements on the fast construction and safe maintenance of matching gas supply facilities are put forward for gas enterprises.The most pressing challenges facing most enterprises are how to break through one bottleneck in the construction,repair,and maintenance process of gas supply facilities,and how to ensure facility safe and efficient construction and smooth repair and maintenance.So,many problems and defects of buried valve during its service were found out so as to ensure the safe and efficient operation of gas pipelines.In addition,several corresponding improvement measures were made,and their applicability was verified.Results show that(1)the reasons why buried valve cannot be released,replaced,detected,and locked are incomplete function design and unmatched support tools;(to)for these defects from gas pipelines or valve,the functions should be improved by designing the releasing short string and control valve,and manufacturing the sleeve-type support lock for valve locking;(3)by means of perfecting valve functions,not only gas in pipelines can be released,but also the replacement can be conducted,and its result can be detected by injecting inert gas into pipelines through some releasing control valve;and(4)when risk operations are carried out on gas pipelines,it's necessary to adopt sleeve-type lock to isolate and block square-head operation position of valve so as to prevent the outsiders from turning on the valve accidentally,and avoid some accidental personal injury.It's deemed that to adopt these improvement measures may reduce user number influenced by discon tinuous gas supply during pipeline maintenance and repair,shorten time affecting users due to discontinuous gas supply,cut down labor cost and gas-releasing loss because of maintenance and repair,and increase both economical and social benefit for gas enterprises.
作者
彭峻峰
罗娜
唐波
Peng Junfeng;Lou Na;Tang Bo(Sichuan Chuangang Group Corporation,Limited,Chengdu,Sichuan 610017,China;Sichuan Shuyu Petroleum Construction&Installation Engineering Corporation Limited,Chengdu,Sichuan 610051,China)
出处
《天然气技术与经济》
2019年第5期62-66,共5页
Natural Gas Technology and Economy
关键词
燃气
埋地阀门
控制阀
锁定
功能
改进
Gas
Buried valve
Control valve
Locking
Function
Improvement
