最新二保焊机安全操作规程复习课程

二氧化碳气体保护焊安全操作规程

1.作业前，二氧化碳气体应预热15min。开气时，操作人员必须站在瓶嘴的侧面。

2.作业前，应检查并确认焊丝的进给机构、电线的连接部分、二氧化碳气体的供应系统及

冷却水循环系统合乎要求，焊枪冷却水系统不得漏水。

3.二氧化碳气体瓶宜放阴凉处，其最高温度不得超过30℃。

4.二氧化碳气体预热器端的电压，不得大于36V，作业后，应切断电源。

5.焊接操作及配合人员必须按规定穿戴劳动防护用品。并必须采取防止触电、高空坠落、

瓦斯中毒和火灾等事故的安全措施。

6.现场使用的电焊机，应设有防雨、防潮、防晒的机棚，并应装设相应的消防器材。

7.高空焊接或切割时，必须系好安全带，焊接周围和下方应采取防火措施，并应有专人监

护。

8.当需施焊受压容器、密封容器、油桶、管道、沾有可燃气体和溶液的工作时，应先消除

容器及管道内压力，消除可燃气体和溶液，然后冲洗有毒、有害、易燃物质；对存有残余油脂的容器，应先有蒸汽、碱水冲洗，并打开盖口，确认容器清洗干净后，再灌满清水方可进行焊接。在容器内焊接应采取防止触电、中毒和窒息的措施。焊、割密封容器应留出气孔，必要时在进、出气口处装设通风设备；容器内照明电压不得超过12V，焊工与焊件间应绝缘；容器处应设专人监护。严禁在已喷涂过油漆和塑料的容器内焊接。

9.对承压状态的压力容器及管道、带电设备、承载结构的受力部位和装有易燃、易爆物品

的容器严禁进行焊接和切割。

10.焊接铜、铝、锌、锡等有色金属时，应通风良好，焊接人员应戴防毒面罩、呼吸滤清器

或采取其他防毒措施。

11.当消除焊缝焊渣时，应戴防护眼镜，头部应避开敲击焊渣飞溅方向。

雨天不得在露天电焊。在潮湿地带作业时，操作人员应站在铺有绝缘物品的地方，并应穿绝

缘鞋。Unit 3 Friendship

Key to Exercises

Opener

Suggested answers for reference

1. I like the second best. You know why? Because the quotation tells me that a real

friend is there when you are sad, when you are emotionally hurt, providing you with sympathy and comfort.

2. I like the third best. You know why? Because what I can learn from the quotation

is that experience will teach you that to have real friends is more important than to have more friends.

3. I like the fourth best. You know why? Because the quotation tells me that it is a

miracle to have a real friend who trusts and supports you when others are against you.

4. I like the fifth best. You know why? Because what I can learn from the quotation

is that nothing can be more important than being honest in making friends.

5. I like the sixth best. You know why? Because the quotation tells me that a true

friend is unforgettable, remaining in your heart as you journey through life.

Reading & Interacting

I. Understanding the Text

1. Text Organization

1.1

12.