气液两用电磁式燃气紧急切断阀的研制

发布时间：2018-01-08 02:31

本文关键词：气液两用电磁式燃气紧急切断阀的研制　出处：《北京化工大学》2016年硕士论文　论文类型：学位论文

【摘要】：随着城市燃气的快速发展,燃气用户大量增加,燃气事故也层出不穷,一旦发生事故,一方面会给人民生命及财产造成极大损失,另一方面会对社会的公共安全构成了不稳定因素,因此燃气用户户内安全备受关注。在北京的燃气事故中,以使用液化石油气瓶组作为燃料来源的餐饮业最为多发。北京市政府希望对这些用户进行治理,但此类型的供气方式缺少相应的燃气安全设备。因此,设计一种应用于以液化石油气瓶组作为燃料来源,保障燃气使用安全的阀门势在必行。针对此种使用环境,本文参考了其他阀门的结构及使用情况,通过研究、计算、分析及试验测试,设计出了一种气液两用的电磁式燃气紧急切断阀。本次设计根据阀门所处的工作环境,从总体系统入手,分自动控制和机械结构两部分进行。自动控制部分主要为：通过对原有电磁线圈的设计进行小幅修改,增加磁靴和导磁片使磁力大幅增强以满足使用要求。机械部分为全新设计：为满足在低压和高压下均能关闭并密封的需求,采用了阀杆和阀瓣不在同侧的反向关闭结构,同时为了满足高压下能开启阀瓣,设有先导阀；阀体、阀盖这两个主要承压件为满足防腐要求,采用铸铝(ZL101-T6)材质,通过壁厚计算进行设计以保证强度,由Pro/E建立三维模型,并使用其Mechanica模块进行分析,验证设计可靠；阀杆采用不锈钢(06Cr19Ni10)材质,通过运动行程计算出阀杆的长度及各结构的位置,由Pro/E建立三维模型,并使用其Mechanica模块进行形变分析,验证设计可行；阀瓣采用不锈钢+氟橡胶的材质,通过计算密封比压,并通过Pro/E及其Mechanica模块进行形变分析,验证密封满足是设计要求；通过Pro/E模拟进行装配,验证各零部件之间无冲突,使实际装配更加顺利。样机装配完成后,对其进行了基本性能、功能及耐用性方面的试验：基本性能测试,验证了阀门强度和致密性安全可靠；功能测试,验证了阀门完成设计动作不会出现问题；耐久性测试,验证了阀门在寿命期内可放心使用。本文根据需求方北京市市容市政管理委员会提出的功能需求,通过对气液两用电磁式燃气紧急切断阀的设计,实现此类使用环境的安全阀门从无到有的突破,为北京甚至全国的液化石油气瓶组的使用用户提供更安全的保障。
[Abstract]:With the rapid development of urban gas, the number of gas users increases greatly, and gas accidents emerge in endlessly. Once accidents occur, on the one hand, it will cause great loss of people's lives and property. On the other hand, it will constitute an unstable factor to the public safety of the society, so the safety of gas users in the household is of great concern. In the gas accident in Beijing. The catering industry that uses liquefied petroleum gas (LPG) as fuel source is the most common. The Beijing Municipal Government wants to treat these users, but this type of gas supply lacks the corresponding gas safety equipment. It is imperative to design a kind of valve which can be used as fuel source to ensure the safe use of gas. In view of this kind of service environment, this paper refers to the structure and application of other valves, and through the research. By calculation, analysis and test, a gas-liquid electromagnetic gas emergency cut-off valve is designed. According to the working environment of the valve, the design starts with the overall system. It is divided into two parts: automatic control and mechanical structure. The automatic control part is mainly: the design of the original electromagnetic coil is modified slightly. The mechanical part is completely new designed to meet the requirements of closing and sealing at low and high pressure. The reverse closing structure of the stem and disc is not on the same side, and the pilot valve is provided to meet the need of opening the disc under high pressure. In order to meet the requirements of anticorrosion, the valve body and bonnet are designed to ensure the strength through the calculation of wall thickness, and the three-dimensional model is established by Pro/E. The Mechanica module is used to analyze and verify the reliability of the design. The stem is made of stainless steel 06Cr19Ni10. The length of the stem and the position of each structure are calculated by the movement stroke, and the three-dimensional model is established by Pro/E. The Mechanica module is used for deformation analysis to verify the feasibility of the design. The disc is made of stainless steel fluorine rubber, the seal specific pressure is calculated, and the deformation analysis is carried out by Pro/E and its Mechanica module to verify that the seal meets the design requirements. The assembly is simulated by Pro/E to verify that there is no conflict between the components and make the actual assembly more smooth. After the prototype assembly is completed, the basic performance of the prototype is carried out. Functional and durability tests: basic performance tests verify the safety and reliability of valve strength and compactness; Function test, verify that the valve design action will not appear problems; The durability test verifies that the valve can be safely used in the life cycle. According to the functional requirements of the Beijing Municipal appearance Administration Committee on the demand side, the design of the gas-liquid dual-purpose electromagnetic gas emergency cut off valve is carried out in this paper. To achieve this kind of safety valve from scratch to the use of the environment to provide a more safe protection for the use of LPG cylinders in Beijing and even throughout the country.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH134

【参考文献】