GHLS-I双向拉绳开关
用途：
双向拉绳开关广泛应用于钢铁、水泥、电厂、矿山等具有带式输送机的厂矿，该产品安装在胶带输送机的两侧，是用于胶带输送机紧急事故停机的一种保护开关，在开关操作距离内任何一点拉动钢丝绳，切断运行电路使全线停机，实现对胶带机及人身的保护。
工作原理：
当胶带运输现场发生紧急事故时，拉动系在吊耳上的钢丝绳，使机内的滑块与开关作用，发出停机型号。
双向拉绳开关分1型两种型号，1型动作后自动复位，（见图1）。2型动作后有自锁装置（锁定销），需要手动拉出复位后开关才能重新使用，（见图2）。本件为双向动作，拉绳臂两端均可安装拉绳，当胶带机运行出现故障需要停机时，现场工作人员拉动连接在拉绳上的拉绳，使转臂转过一定的角度，触动工作开关后能同时发出报警和停机两组信号，达到预防和控制设备及操作员的目的。
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主要技术指标
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产品型号
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动作角度
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极限角度
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动作力（kg）
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触点数量
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触点容量
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复位方式
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可靠性
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防护等级
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常开
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常闭
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GHLS-I
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30o
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75o
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10
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1
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1
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AC380V 5A
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自动
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>10万次
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IP65
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GHLS-II
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30o
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75o
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10
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1
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1
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AC380V 5A
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手动
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>10万次
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IP65
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FOR PRECISE MEASUREMENT OF
HEAT FLUXES
Heat Fluxes To 10 Btu/hr ft
Temperature Range to 18000F.
Rapid Response (0.1 Secs.)
Linear Output
Accuracy 5%
Negligible Thermal Resistance
No Power Supply Required
PRINCIPLE
The flow of heat to, or from a surface on which the transducer is placed creates a small temperature difference between the upper and lower surfaces of the transducer. These surfaces are in thermal contact with a miniature, high temperature thermopile which generates
a direct current signal from this temperature difference. The thermoelectric element yields signals which may be measured by a microvolt meter. Because each unit is self-powered, no excitation voltage is necessary. The thermal resistance introduced by the transducer is negligible for all practical purposes.
CALIBRATION
ITI Thermal Flux Meters are individually calibrated at a base temperature of 70 F. An absolute calibration technique is used to determine the meter constant to the required accuracy, and verified by calculation. A temperature correction curve for elevated temperatures is also provided.
SPECIFICATIONS
Temperature Range . .........................- 425 F. to 1800 F.
(2000 F. in Vacuum)
Maximum Flux Density..............................10 Btu/hr ft
Material................................................Stainless Steels
Time Constant.................................................0.1 Secs.
Size . . ............................................0.100”x 5/8”x 5/8”
Sensitivity......................................150 Btu/hr ft �Volt
Accuracy....................................................................5%
APPLICATION
The Model HT-50 Thermal Flux Meter is a solid state, flat-plate, metallic transducer designed to measure heat flow directly. This transducer is placed upon any surface through which the heat flow is to be measured.
The unit will measure heat flow to, or from any surface. In many cases, the transducers may also be installed internally within any barrier with no loss of accuracy.
Application areas include:
Furnace/Boiler Heat Flow
High Temperature Heat Transfer
Engine Heat Loss Measurements
Physical Property Determinations
Aeronautical and Space Technology
OPERATION
The transducer may be attached to the heat transfer surface by either clamp, or ceramic cement. The D.C. signal generated by the transducer from the heat flow is conducted to the readout by means of a cable. When the transducer attains equilibrium (app. 0.1 sec.) with
the surface, the generated voltage will be proportional to the heat flux. When this output voltage is multiplied by a specific calibration constant, which is supplied with each transducer, the resulting value will be heat loss/gain in terms of Btu/hr ft.
GHLS-I
GHLS-I双向拉绳开关
GHLSI
GHLS-I
GHLS-I双向拉绳开关
GHLSI
