公司立足常州地区经营产品涵盖铝艺围墙护栏、锌钢企业护栏、各式铝艺阳台护栏、铝艺大门、铝艺楼梯扶手、门窗系统,车库门、新型阳光房等多领域。

示例图片三
网站首页 > 新闻资讯 > 业界资讯

燃煤热风炉压力表的作用、机构及原理

2018-11-10 16:22:29 常州市星火铝艺制品有限公司 阅读

工业燃煤热风炉压力表的作用.压力表是一种测量压力大小的仪表,可用来测量热风炉内实际的压力值,压力表指针的变化可以反映燃烧及负荷的变化。司炉人员根据压力表的指示数来调节燃烧,使之适应外界负荷的变化,将热风炉压力控制在允许的范围内,达到安全运行的目的。因此,压力表也是热风炉上不可缺少的安全附件,司炉人员将压力表比喻成“眼睛”。

The function of pressure gauge in industrial coal-fired hot-blast stove. Pressure gauge is a kind of instrument for measuring pressure. It can be used to measure the actual pressure value in hot-blast stove. The change of pressure gauge pointer can reflect the change of combustion and load. The fireman adjusts the combustion according to the indicator of the pressure gauge to adapt to the change of external load, and controls the pressure of the hot blast stove within the allowable range, so as to achieve the goal of safe operation. Therefore, the pressure gauge is also an indispensable safety accessory to the hot blast stove. The fireman compares the pressure gauge to "eyes". 2、工业燃煤热风炉压力表的机构及原理

2. The mechanism and principle of industrial coal fired hot blast stove pressure gauge.

工业热风炉上普遍使用的压力表,主要是弹簧管式压力表,它由表盘、弹簧弯管、连杆、扇形齿轮、小齿轮、中心轴、指针等零件组成。

Pressure gauges commonly used in industrial hot stoves are mainly spring tube pressure gauges, which are composed of dial, spring elbow, connecting rod, sector gear, pinion, central shaft, pointer and other parts.

弹簧管由金属管制成,管子截面呈扁平圆形,它的一端固定在支撑坐上,并与管接头相通;另一端是封闭的自由端,与连杆链接。连杆的另一端连接扇形齿轮,扇形齿轮又与中心轴上的小齿轮相衔接。压力表的指针,固定在中心轴上。

The spring tube is made of metal tube, its cross section is flat and circular, one end of which is fixed on the support seat and connected with the pipe joint; the other end is a closed free end which is connected with the connecting rod. The other end of the connecting rod is connected with the fan-shaped gear, and the fan gear is connected with the pinion on the central shaft. The pointer of the pressure gauge is fixed on the center shaft.

当被测介质压力作用于弹簧管的内壁时,弹簧管扁平圆形截面就有膨胀成圆形的趋势,从而由固定端开始逐渐向外伸张,也就是使自由端向外移动,在经过连杆带动扇形齿轮与小齿轮转动,使指针向顺时针方向偏转一个角度,这时指针在压力表表盘上指示的刻度值,就是热风炉内压力降低时,弹簧弯管力图恢复原状,加上游丝的牵制,使指针返回到相应的位置。当压力消失后,弹簧管恢复到原来的形状,指针也就回到始点。

When the measured medium pressure acts on the inner wall of the spring tube, the flat circular section of the spring tube expands into a circular one, which gradually extends outward from the fixed end, i.e. the free end moves outward, and the fan-shaped gear and pinion rotate through the connecting rod, so that the pointer deflects clockwise. At this time, the calibration value indicated by the pointer on the pressure gauge dial is that when the pressure in the hot blast stove decreases, the spring elbow tries to restore the original state, plus the restraint of the hairspring, so that the pointer returns to the corresponding position. When the pressure is gone, the spring tube returns to its original shape and the pointer returns to its starting point.

3、对压力表的要求

3. Requirements for pressure gauge

(1)每台热风炉必须装有与锅筒蒸汽空间直接相连的压力表,在给水管的调节阀前、可分为省煤器出口、过热器出口与主汽阀之间,都应装有压力表。

(1) Each hot blast stove must be equipped with a pressure gauge directly connected with the steam space of the drum. Pressure gauges should be installed before the regulating valve of the water supply pipe, which can be divided into the economizer outlet, the superheater outlet and the main steam valve.

(2)对于额定蒸汽压力小于2.5Mpa的热风炉,压力表精确度不低于2.5级;对于额定蒸汽压力大于或等于2.5Mpa的热风炉,压力表的精确度不应低于1.5级。对于热水热风炉,压力表的精确度不应低于2.5级。

(2) For stoves with rated steam pressure less than 2.5 Mpa, the accuracy of pressure gauge should not be less than 2.5 grade; for stoves with rated steam pressure greater than or equal to 2.5 Mpa, the accuracy of pressure gauge should not be less than 1.5 grade. For hot water hot stove, the accuracy of pressure gauge should not be lower than level 2.5.

(3)压力表的表盘刻度极限值为工作压力的1.5—3.0倍,最好选用2倍。

(3) the dial gauge limit of the pressure gauge is 1.5 to 3 times the working pressure, and the best choice is 2 times.

(4)压力表的表盘大小,应保证司炉人员能清楚地看到压力指示值。

(4) the dial gauge of the pressure gauge should ensure that the stoker can clearly see the pressure indication value.

(5)压力表装置的校验和维护,应符合国家计量部常州铝艺大门的规定。压力表装用前应校验,并在刻度盘上划红线指出工作压力或是选用标有红色箭头的定位压力表,装用后一般每半年至少校验一次,校验后应封印。

(5) the calibration and maintenance of the pressure gauge shall comply with the requirements of the metrological Department of the state. Pressure gauges should be checked before installation, and red lines should be drawn on the dial to indicate the working pressure or select the positioning pressure gauges marked with red arrows. After installation, pressure gauges should be checked at least once every six months and sealed after verification.

(6)压力表出现这些状况时应该停止使用:有限止钉的压力表在无压力时,指针转动后不能回到限止钉处;没有限止钉的压力表在无压力时,指针离零位的数值超过压力表规定的允许误差;表面玻璃破碎或是表盘刻度模糊不清;封印损坏或是超过校验有效期限;表内泄漏或是指针跳动;其他影响压力表准确的缺陷。

(6) Pressure gauges should stop using when these conditions occur: pressure gauges with limited stop pins can not return to the limit pins after the pointer rotates without pressure; pressure gauges with unlimited stop pins can exceed the allowable error specified by the pressure gauge when there is no pressure; surface glass is broken or dial calibration is blurred. The seal is damaged or exceeds the validity period of the calibration; the leakage of the meter or the jump of the pointer; other defects affecting the accuracy of the pressure gauge.

来源:无锡海腾钢管 
版权所有@转载请注明:http://www.wxhtgg.com/PipeKnowledgeshow.asp?id=248



标签:   常州铝艺大门 铝艺大门 常州铝艺护栏 铝艺护栏 热风炉