闸板

Ram sealing surface than the valve seat to seal a broad margin, and to ensure that the valve is not in use before the sealing of the bottom line and the gate valve seat bottom line sealing surface at the same level, so that the valve in the use of a certain period of time after not even wear Will reduce the need to ensure the sealing surface width.

闸板密封面比阀座密封面宽出一定的余量，并保证阀门在未使用前闸板密封面底线与阀座密封面底线在同一高度，使阀门在使用一定时间后即使磨损也不会减少必须保证的密封面宽度。

Hydraulic cylinder piston rod connects gate ,the operation principle of manual hydraulic knife gate valve is that through manually handle , manual- driven hydraulic pump makes hydraulic fluid in the upper and lower chamber of hydraulic cylinder to drive gate opened and closed to achieve valve's open and closed.

手动液压刀闸阀由是由液压缸活塞杆连接阀门闸板，其操作原理手动驱动液压泵手柄把液压油通过手动换向阀压入液压缸的上下腔来带动活塞杆做上下动作，从而带动闸板的启闭来达到阀门开关作用。

According to the structural feature of parallel single disk gate valve,the strength and rigidity of body will be calculated with finite element method,and with cylindroid shell theory .

根据主闸阀结构特点，分别用有限元法和椭圆柱板壳理论公式计算了阀体的强度与刚度，并进行了分析对比，同时对闸板的刚度进行了校核。

Shut off the lower pipe ram, open the choke line and test the next ram and choke line.

关下部钻杆闸板，开放喷阀，试压第二个闸板和放喷泉管线。

Small moment: As the damper plate weight is light, the damper plate and the guide rail and the rubber packing friction drag is small, therefore causes the hand wheel operation moment of force will be small

力矩小：由于闸板重量轻，闸板与导轨及橡胶密封条的摩擦阻力小，故使得手轮操作力矩小

Moments of force are small: Because the damper plate weight is light, the damper plate and the guide rail and the rubber packing friction drag is small, therefore causes the handwheel operation moment of force to be small

力矩小：由于闸板重量轻，闸板与导轨及橡胶密封条的摩擦阻力小，故使得手轮操作力矩小

When closed-depending on the type of ram selected-they will seal around the drillpipe, seal off the open hole, or in emergencies shear the drillpipe and seai off the hole, The basic concept of the ram BOP has not changed in 50 years.

当关闭时-取决于被选择的闸板的类型-它们会封闭钻井管，封锁开放的孔洞，或者在紧急情况下切断钻井管并封住孔洞。闸板防喷器的基本概念在五十年内没有改变过。

Along with the stem of the gate valve for linear motion, and called the lift rod valve gate valve is also called the next shot.

闸阀的闸板随阀杆一起作直线运动的，叫升降杆闸阀亦叫明杆闸阀。

Heating projects, commonly used is clearly one gate valve wedge bar (Z41H-16C) and dark pole wedge single slide valve (Z45T-10), the former station mounted on the primary side of heat, which is installed thermal station in the secondary side.

供热工程中，常用的是明杆楔式单闸板闸阀(Z41H-16C)和暗杆楔式单闸板闸阀(Z45T-10)，前者装在热力站内一次侧，后者装在热力站内二次侧。

When it is over temperature, the bypass flue's gate valve open a few, and air preheating chamber gate valve shut down a few.

主烟道和加热腔烟道上的闸板阀受预热箱内温度控制，超温时，主烟道闸板打开一定开度，加热腔闸板适当关闭，实现温度调节。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。