安全工程专业英语
English for Safety Engineering
试讲人：徐海丰
机械科学与工程学院
Unit Ten: Tag out and lock out
单元10：挂牌上锁
Control of Hazardous Energy
控制危险源
机械科学与工程学院
College of Mechanical Science and Engineering
1. Who needs training?
谁需要培训
2. What is hazardous energy?
什么是危险能量源
3. What is lockout/tagout?
什么是挂牌上锁
4. What lockout/tagout procedures are required?
挂牌锁定程序的要求
机械科学与工程学院
College of Mechanical Science and Engineering
Authorized employees –people who lock or tag out machines or
equipment to perform servicing.
授权人员－在维修设备时锁定和挂牌的人员
Affected employees –people who use machines or equipment on
which servicing is performed under lockout/tagout.
涉及人员－操作在维修时锁定挂牌设备的人员
Other employees –people who work in the area of locked out
machinery or equipment
其他员工－在锁定设备区域工作的人员
机械科学与工程学院
College of Mechanical Science and Engineering
Hazardous energy is one of the following:
危险能量源包括:
1. Electricity – live or stored
电－带电或蓄积的
2. Moving machinery parts
运动的机械部件
3. Stored mechanical
movement in machinery
设备中蓄积的机械能
机械科学与工程学院
College of Mechanical Science and Engineering
4. Stored heat (steam lines or hot
liquids)蓄积的热量（蒸汽或热水管道）
5. Chemicals in pipelines under
pressure or force of gravity带压或重
力作用的化学品管道
6. Any other active or stored
energy sources that could harm
其他可能伤害员工的蓄积能量
机械科学与工程学院
College of Mechanical Science and Engineering
Hazardous Energy Source Examples
危险能量源示例
Live electrical lines 带电导线
Electrical capacitors电容器
Lasers激光
Engines that move machinery parts
机械运动部件
Hydraulic lifts
液压机
Pneumatic (air pressure) lines
压缩空气管道
Springs弹簧
机械科学与工程学院
College of Mechanical Science and Engineering
Lockout/Tagout is important in
confined spaces since it is easy to
get trapped and hard to escape.
Pipelines leading into tanks must be
blanked off before entering the
space.
All electrical and mechanical
hazardous energy must be
addressed and locked out or tagged
as needed.
机械科学与工程学院
College of Mechanical Science and Engineering
机械科学与工程学院
College of Mechanical Science and Engineering
When is Lockout/Tag-out required?
When someone will be servicing or
repairing machinery or equipment
AND
the unexpected machinery start-up or
release of stored energy could cause
injury
The person working on this saw
obviously would not want someone
inadvertently starting up the saw.
正在修理锯子的人很明显不希
望有人会不经意的启动设备
机械科学与工程学院
College of Mechanical Science and Engineering
Service and Maintenance Examples
Installing, constructing,安装
adjusting, modifying, 调试
unjamming, cleaning, 清线清洁
lubrication, inspecting, 检修
setup - preparing for normal function
试机
These activities often require a worker
to place all or part of their body into
the machine’s hazard zone.
机械科学与工程学院
College of Mechanical Science and Engineering
Energy-isolating device?
A device that physically prevents transmission or release of energy
such as:
An electrical circuit breaker
电路闸门
A pipeline valve
管道阀门
A machine block
机械锁
机械科学与工程学院
College of Mechanical Science and Engineering
What is a Lockout Device?
A device that positively:
prevents a machine from being started up or turned
on,
prevents a machinery part from moving
prevents electrical energizing,
blocks a pipeline, steam line or air line.
“A lockout device is a usually a lock, key, valve or switch cover
that holds an energy isolating or control device in the off or safe
position until the lockout device is removed. Lockout must be
done according to an established procedure.”
机械科学与工程学院
College of Mechanical Science and Engineering
Electrical Lockout Devices
电气锁定装置
Locked out circuit breaker电路开关锁定
Locked out electrical panel
Locked out electrical plug电气插头锁定
电柜锁定
机械科学与工程学院
College of Mechanical Science and Engineering
Fluid & Gas Lockout Devices
“These lockout devices prevent the valves in air, water, gas or
steam lines from being opened.”
机械科学与工程学院
College of Mechanical Science and Engineering
Pipe Lockout Devices
“A physical block or break in a pipeline prevents steam, gas or
liquids from flowing through the pipe to the area where
maintenance work is being done. For example, the pipe to a
chemical tank must be blocked or disconnected before someone
goes in to do repair or maintenance.”
机械科学与工程学院
College of Mechanical Science and Engineering
Pneumatic(气动) Lockout Devices
“These
devices
prevent
compressed air from flowing
through lines and moving some
part of the machinery. The locks
prevent anyone from hooking up
( 挂 钩 , 联 系 ) the lines while
maintenance is being done.”
机械科学与工程学院
College of Mechanical Science and Engineering
Physical Blocks
Truck bed lockout
卡车车厢锁定
Punch press blocks
冲压机阻隔器
机械科学与工程学院
College of Mechanical Science and Engineering
Group Lockout Devices 多重锁定装置
Used when more than one person doing
maintenance or repair on same machine or
equipment.
Machinery or equipment can’t be started up
until all locks are removed.
Each person places and removes their own lock.
机械科学与工程学院
College of Mechanical Science and Engineering
Example of a bad lock out/ Tag out
挂牌上锁的错误示范
“This obviously not a
real lockout device
since it could be easily
removed.”
机械科学与工程学院
College of Mechanical Science and Engineering
Tags are warning devices only 警示装置
They don’t provide the same level of protection as lockout device
They can only be removed by an authorized person.
They must be legible, securely attached and resistant to degradation.
机械科学与工程学院
College of Mechanical Science and Engineering
Six Steps to Follow:
1.Notify affected employees that machine or
equipment will be shut down and locked out告知涉
及人员设备将要关闭并锁定
2. Shut down the machinery or equipment关闭设备
3. Isolate energy sources with energy-isolating
devices 隔离能量源
4. Lock out energy-isolating devices with assigned
locks锁定能量隔离装置
5. Release or restrain stored or residual energy
释放或控制蓄积或残余的能量
6. Test machinery to make sure it can’t start up
测试设备以确认不能启动
机械科学与工程学院
College of Mechanical Science and Engineering
Shutdown
关闭设备
Notify Employees
告知员工
Attach Lockout
设置锁定
Device
Equipment
Release Stored Energy
释放蓄积能量
Isolate Energy
隔离能量
Verify Lockout
确认锁定
Service &Maintenance
维护
机械科学与工程学院
College of Mechanical Science and Engineering
Key Points to Remember
– Hazardous energy is dangerous and deadly
– 危险能量源是致命的
– Lockout/tagout is used whenever unexpected startup or stored energy release could occur
– 挂牌锁定能够防止设备意外启动和储能管道释放
– Be sure to leave all lockout/tagout devices in place
and wait for instructions before using equipment
– 确认所有的挂牌锁定就位，才能进行维修检查操
作
机械科学与工程学院
College of Mechanical Science and Engineering
Thank you for your attentions!
谢谢！
机械科学与工程学院
College of Mechanical Science and Engineering