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Explosion-proof thermal resistance Try to avoid installing thermal resistance near the dead end of valve elbow pipe
2012-4-9 10:46:09


隔爆热电阻作为温度测量和控制的传感器与显示仪表经常都是配套使用,以直接测量和控制生产过程中的气体、液体和蒸汽的温度。 Explosion-proof thermal resistance As a sensor and display instrument for temperature measurement and control, explosion-proof thermal resistance is often used together to directly measure and control the temperature of gas, liquid and steam in the production process. Do you know how to prevent explosion-proof thermal resistance? It is based on the principle of gap explosion protection, designed with sufficient strength of the junction box and other components, all parts that will generate sparks, arcs and dangerous temperatures are sealed in the junction box cavity, when the cavity explosion, it can pass through the joint surface The gap is extinguished and cooled, so that the flame and temperature after the explosion cannot be transmitted outside the cavity, thereby achieving the purpose of explosion protection.

的安装,应注意有利于测温准确,安全可考及维修方便,而且不影响设备运行和生产操作.要满足以上要求,在选择对热电阻的安装部位和插入深度时要注意以下几点:1、为了使热电阻的测量端与被测介质之间有充分的热交换,应合理选择测点位置,尽量避免在阀门,弯头及管道和设备的死角附近装设热电阻.2、带有保护套管的热电阻有传热和散热损失,为了减少测量误差,热电偶和防爆热电阻应该有足够的插入深度:(1)对于测量管道中心流体温度的热电阻,一般都应将其测量端插入到管道中心处(垂直安装或倾斜安装).如被测流体的管道直径是200毫米,那热电阻插入深度应选择100毫米;(2)对于高温高压和高速流体的温度测量(如主蒸汽温度),为了减小保护套对流体的阻力和防止保护套在流体作用下发生断裂,可采取保护管浅插方式或采用热套式热 For the installation of explosion-proof thermal resistors , attention should be paid to the accuracy of temperature measurement, safety and ease of maintenance, and without affecting the operation and production operations of the equipment. To meet the above requirements, pay attention to the installation location and insertion depth of thermal resistors. The following points: 1.In order to have sufficient heat exchange between the measuring end of the thermal resistance and the measured medium, the measurement point location should be selected reasonably, and the thermal resistance should be installed near the dead corner of the valve, elbow and pipeline and equipment as much as possible .2 The thermal resistance with protective sleeve has heat transfer and heat loss. In order to reduce the measurement error, the thermocouple and explosion-proof thermal resistance should have sufficient insertion depth: (1) For the thermal resistance measuring the fluid temperature in the center of the pipeline, the general The measuring end should be inserted into the center of the pipeline (vertical installation or inclined installation). If the pipe diameter of the fluid to be measured is 200 mm, the thermal resistance insertion depth should be 100 mm; (2) For high temperature, high pressure and high speed fluids Temperature measurement (such as the main steam temperature). In order to reduce the resistance of the protective sleeve to the fluid and prevent the protective sleeve from breaking under the action of the fluid, the protective tube can be inserted shallowly or a thermal jacket can be used. Shallow plug-in type thermal resistance protection sleeve, the depth of its insertion into the main steam pipe should not be less than 75mm; the standard insertion depth of the thermal jacket type thermal resistance is 100mm (3) If it is necessary to measure the temperature of the flue gas in the flue, The diameter of the channel is 4m, and the insertion depth of the thermal resistance is 1m. (4) When the insertion depth of the measurement original exceeds 1m, it should be installed as vertically as possible, or a support frame and a protective sleeve should be installed.


型号WZPK-136/WZPK2-136 WREK-236/WZPK2-236 WRNK-436/WZPK2-436 WZPK-166/WZPK2-166 WREK-266/WZPK2-266 WRNK-466/WZPK2-466 WZPK-176/WZPK2-176 WREK-276/WZPK2-276 WRNK-476/WZPK2-476 WZPK-196/WZPK2-196 WREK-296/WZPK2-296 WRNK-496/WZPK2-496 分度号Pt100 Pt100 Pt100 Pt100 测量范围-200~+500℃ -200~+500℃ -200~+500℃ -200~+500℃ 精度等级A级,B级Ⅰ级,B级A级,B级A级,B级测量端形式单支,双支单支,双支单支,双支单支,双支接线方式3线制或4线制3线制或4线制3线制或4线制3线制或4线制过程连接卡套螺纹M12×1.5 M16×1.5 卡套法兰卡套螺纹M12×1.5 M1×1.5 卡套法兰卡套螺纹M12×1.5 M16×1.5 卡套法兰卡套螺纹M12×1.5 M16×1.5 卡套法兰插入长度100,150,200,300 400,500,750,1000 100,150,200,300 400,500,750,1000 100,150,200,300 400,500,750,1000 100,150,200,300 400,500,750,1000 保护管材料质1Cr18Ni9Ti Explosion-proof thermal resistance model WZPK-136 / WZPK2-136 WREK-236 / WZPK2-236 WRNK-436 / WZPK2-436 WZPK-166 / WZPK2-166 WREK-266 / WZPK2-266 WRNK-466 / WZPK2-466 WZPK-176 / WZPK2-176 WREK-276 / WZPK2-276 WRNK-476 / WZPK2-476 WZPK-196 / WZPK2-196 WREK-296 / WZPK2-296 WRNK-496 / WZPK2-496 Graduation number Pt100 Pt100 Pt100 Pt100 Measurement range -200 ~ + 500 ℃ -200 ~ + 500 ℃ -200 ~ + 500 ℃ -200 ~ + 500 ℃ Accuracy class A, B, class I, B, class A, B, class A, and B measurement terminal type single, double Single, double, single, double, single, double branch connection mode 3-wire or 4-wire 3-wire or 4-wire 3-wire or 4-wire 3-wire or 4-wire process connection ferrule Thread M12 × 1.5 M16 × 1.5 Ferrule flange ferrule M12 × 1.5 M1 × 1.5 Ferrule flange ferrule thread M12 × 1.5 M16 × 1.5 Ferrule flange ferrule thread M12 × 1.5 M16 × 1.5 ferrule flange Insertion length 100, 150, 200, 300 400, 500, 750, 1000 100, 150, 200, 300 400, 500, 750, 1000 100, 150, 200, 300 400, 500, 750, 1000 100, 150, 200, 300 400, 500, 750, 1000 Protection tube material quality 1Cr18Ni9Ti