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expansion loop
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  膨胀环
     Abstract The lower tube plate of internal heat exchanger was connected to converter shell by an expansion loop to simplify structure, gurantee strength and regidity of shell and compensate for differential stress betwen shell and tubes due to heat expansion.
     内换热器的下管板与转化器壳体采用膨胀环连接,以简化结构,保证壳体强度和刚度,有效补偿壳体与管子之间由于热膨胀而产生的温差应力。
短句来源
     Formula for approximative stress calculation of expansion loop is described with a design case cited.
     介绍了膨胀环应力近似计算公式及设计实例。
短句来源
  相似匹配句对
     On the Earth expansion
     地球膨胀说提出、发展及其主要事实依据
短句来源
     The Transmission Loop
     传输环路
短句来源
     It is characteristic of expansion.
     这种改造的特点是它的扩张性。
短句来源
     Stability Analysis of the Control Loop with Refrigeration Evaporator and Thermal Expansion Valve
     制冷蒸发器与热力膨胀阀调节回路的稳定性分析
     Stability analysis of Refrigeration of Evaporator and thermo Expansion Valve Control Loop
     制冷蒸发器与热力膨胀阀调节回路的稳定性分析
短句来源
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  expansion loop
Two rate-conversion methods including the compression/expansion loop and the optical delay line structure are discussed and compared relating to the power budget and the optical signal-to-noise ratio.
      
Two guides on both sides of each expansion loop ensure proper alignment.
      
Expansion loop shall provide adequate expansion of the main straight runs of the system within the stress limits specified in ASME B31.1.
      
As shown in Diagram 6, steadwater separators are best located after an expansion loop to maximize vaporfliquid contacting time.
      


The central drain pipe is an essential device for large size floating roof tanks. The basic requirements for the drain pipe are: capable of heaving freely with the pontoon, reliable sealing in its swivels and flexible rotation,. corrosion resistant in crude oil and rainwater. However, some faults with all kinds of drain pipes took place during its operation due to the different structures and different service environments, one of the faults is the leakage of dynamic seal on the swivel. The analyzing results...

The central drain pipe is an essential device for large size floating roof tanks. The basic requirements for the drain pipe are: capable of heaving freely with the pontoon, reliable sealing in its swivels and flexible rotation,. corrosion resistant in crude oil and rainwater. However, some faults with all kinds of drain pipes took place during its operation due to the different structures and different service environments, one of the faults is the leakage of dynamic seal on the swivel. The analyzing results of the leakage showed that the swivel was compressed due to mishandling in its installation and uneven settlement of tank foundation during operation, that the seal is not applicable to the crude oil stored and the tank volume, and that the structure of drain pipe is not reasonable. Improvements are put forward, which are altering the tensional state of dynamic seal of swivel, and connecting the swivel with expansion loop at water-level for localized pipe section. The investigation indicated that drain pipe with swivel is suitable for large size oil tanks, while drain pipe with metal hose is applicable to product oil tanks.

浮顶中央排水管是大型浮顶储罐必备的排水装置,对其总的要求是能随浮盘自由升降,直管连接处密封可靠,且转动灵活,装置本身能耐储液和雨水腐蚀。由于其各类产品结构各异,应用条件不尽相同,排水管在运行中均存在程度不同的问题,旋转接头式排水管动密封点的泄漏则是发生在运行中的主要问题之一。分析表明,泄漏的原因有:①未严格按照施工规范安装,以及运行期间储罐基础发生不均匀沉降,导致旋转接头受到挤压;②接头密封与储液和罐容不匹配;③排水管的结构不合理。提出了改进措施:改善旋转接头动密封点的受力状况;在局部管段采用水平面内门形补偿器结构连接旋转接头。调研结果表明,根据实际运行的储液和罐容情况,大型原油储罐宜采用旋转接头式浮顶排水管,成品油储罐宜采用金属软管式排水管。

The II-type and O-type expansion loops are the common compensators used in compensating the thermal deformation of steam injection pipeline of heavy oil recovery in oilfield. However, the defects exist in the structures' design of the two compensators. For the former,more supports will be needed,and more heat will lose;while the later,the rupture and leakage are easier to occur. The natural compensating method (the new compensating method)which,by adopting overlong pipe in longitudinal piping section,uses...

The II-type and O-type expansion loops are the common compensators used in compensating the thermal deformation of steam injection pipeline of heavy oil recovery in oilfield. However, the defects exist in the structures' design of the two compensators. For the former,more supports will be needed,and more heat will lose;while the later,the rupture and leakage are easier to occur. The natural compensating method (the new compensating method)which,by adopting overlong pipe in longitudinal piping section,uses the L-type and Z-type expansion loops formed at angle pipe and barrier,is introduced. It can compensate the thermal deformation of pipe with the unsteady deformation of unsteady condition of the pipe when the pipe is forced. The calculation for the longitudinal piping section has been made,the conclusion is that the strength of pipe is enough to compensate the deformation. Meanwhile,the economic evaluation of capital investment and energy saving have been made for the three expansion loops of steam injection pipeline.

目前油田稠油热采注汽管网的热变形主要采用方形补偿器和球形补偿器两种补偿方法。方形补偿器支承较多,热损失大,能源浪费多;而球形补偿器质量不稳定,易出现爆漏等现象。新研制的一种补偿方法——自然补偿法,利用管道的转弯和避开障碍物形成的L型和Z型补偿,在直杆段采用超长杆件,利用受压时的失稳状态的失稳形变来满足管道的热变形。针对直管段进行了实例计算,得出,在整个管道受力变形过程中管道强度足够,该补偿方法安全可行。并且,对采用以上三种补偿的注汽管道的基建投资和节能效益进行了经济评价。

Abstract The lower tube plate of internal heat exchanger was connected to converter shell by an expansion loop to simplify structure, gurantee strength and regidity of shell and compensate for differential stress betwen shell and tubes due to heat expansion. Formula for approximative stress calculation of expansion loop is described with a design case cited. The converter has a top to bottom core post for catalyst beds supporting. The structure is simple and advantageous to gas distribution...

Abstract The lower tube plate of internal heat exchanger was connected to converter shell by an expansion loop to simplify structure, gurantee strength and regidity of shell and compensate for differential stress betwen shell and tubes due to heat expansion. Formula for approximative stress calculation of expansion loop is described with a design case cited. The converter has a top to bottom core post for catalyst beds supporting. The structure is simple and advantageous to gas distribution and load bearing of sheel.

内换热器的下管板与转化器壳体采用膨胀环连接,以简化结构,保证壳体强度和刚度,有效补偿壳体与管子之间由于热膨胀而产生的温差应力。介绍了膨胀环应力近似计算公式及设计实例。转化器内部用一根中心立柱支撑,结构简单,有利于气体分布和转化器壳体受力。

 
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