论文总字数：18769字

摘 要

目前，我国城市民用室内燃气工程的实际施工过程中，在燃气立管设在室内还是室外，表后管的明装与暗装，以及管材的选用等方面，高层建筑的燃气设计问题也随之而来。

本设计主要是针对开发区进行燃气管网的规划，该设计采用天然气为气源，燃气管道主要采用PE管。首先根据城市的面积及人口情况对开发区的燃气需用量进行确定，然后根据用气量及规划要求进行管网设计。在设计燃气管网时，应全面考虑经济、技术等方面因素，选择经济合理的最佳方案。因此本设计选用了低压管网系统。

根据管网的布置和流量，经过水力计算的一系列步骤确定管径；再将管径作为已知条件，再选取调压设施以及用户燃具后满足供应的压力要求，设计具有一定的技术性和经济性。本设计的主要内容还包括：气源性质计算，庭院燃气管网和室内燃气管道的水力计算，施工图设计，管道的选材、施工、防腐和验收等。

关键词：天然气 管网 用气量 管径

Problems and Countermeasures of the safe operation of City gas pipeline network

ABSTRACT

At present, in the actual construction process of our country civil indoor gas engineering, in the gas pipe in indoor or outdoor table, after the tube installed and concealed, and the selection of pipe and gas, design of high-rise buildings has followed.

The theme of this paper is to design the gas network in the development zone, taking the natural gas as the gas source, the PE pipe as the main gas pipeline. Firstly, according to the city area and the demographic situation of the development zone to determine the amount of gas needed; and secondly to design the network according to the gas consumption and the requirements of the plan. In the design of gas pipeline network, the economic, technological and other factors should be considered Comprehensively; finally, choose the best economical solution. therefore this design has selected low pressure pipe system.

In the above pipe network system, used the region to adjust the pressure to stand to the region air feed way. According to pipe network arrangement and current capacity, process water power computation a series of steps definite caliber; Again the caliber took the datum, after selects the accent to press the facility as well as the user again burns has satisfies the supply the pressure request. The design has the very good technical nature and the efficiency.The design of the main content includes: air properties calculation, the courtyard gas network and indoor gas pipeline hydraulic calculation and pipe materials, construction, anti-corrosion and acceptance, etc.

Key Words: The Natural gas The pipe network Gas consumption Diameter

目 录

摘要 I

ABSTRACT II

第一章 绪论 1

第二章 设计基础资料 2

2.1设计依据 2

2.2工程名称 2

2.3建筑概况 2

2.4设计参数 2

2.5用户灶具及热水器选择 3

第三章 庭院管道设计 4

3.1庭院调压柜的选择和选址 4

3.2管材选用 4

3.3管道布置 4

3.4设计计算 5

3.4.1绘制管道水力计算图 5

3.4.2流量计算 6

3.4.3 水力计算过程 8

第四章 室内管道计算 10

4.1 引入管 10

4.1.1 设置位置 10

4.1.2 坡度要求 10

4.1.3 补偿方式 10

4.2管材选用 11

4.3设计计算 11

4.3.1编号 12

4.3.2流量计算 12

4.3.3根据计算流量预选管径并计算阻力损失 12

4.2管材防腐 14

第五章 调压装置与布线要求 16

5.1 调压器的选择 16

5.2调压器的选型 16

5.3 调压装置的设置要求 17

5.4 布线的依据和要求 17

第六章 室内燃气管道安装施工说明 19

6.1 安装准备 19

6.2 预制加工 19

6.3 干管安装 19

6.4 燃气引入管安装 20

6.5 立管安装 21

6.6 支管安装 21

6.7 气表安装 21

6.8 室内燃气管道试压 22

参考文献 23

附录一：庭院管道计算表

附录二：室内燃气管道水力计算表

附录三：各栋楼引入管管径计算表

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